13745 lines
360 KiB
C
13745 lines
360 KiB
C
/*-
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* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
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* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <netinet/sctp_os.h>
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#include <sys/proc.h>
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_sysctl.h>
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#include <netinet/sctp_header.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_output.h>
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#include <netinet/sctp_uio.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_auth.h>
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#include <netinet/sctp_timer.h>
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#include <netinet/sctp_asconf.h>
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#include <netinet/sctp_indata.h>
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#include <netinet/sctp_bsd_addr.h>
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#include <netinet/sctp_input.h>
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#include <netinet/sctp_crc32.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/udp.h>
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#endif
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#include <netinet/udp_var.h>
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#include <machine/in_cksum.h>
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#define SCTP_MAX_GAPS_INARRAY 4
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struct sack_track {
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uint8_t right_edge; /* mergable on the right edge */
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uint8_t left_edge; /* mergable on the left edge */
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uint8_t num_entries;
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uint8_t spare;
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struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
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};
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const struct sack_track sack_array[256] = {
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{0, 0, 0, 0, /* 0x00 */
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{{0, 0},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 1, 0, /* 0x01 */
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{{0, 0},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x02 */
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{{1, 1},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 1, 0, /* 0x03 */
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{{0, 1},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x04 */
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{{2, 2},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x05 */
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{{0, 0},
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{2, 2},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x06 */
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{{1, 2},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 1, 0, /* 0x07 */
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{{0, 2},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x08 */
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{{3, 3},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x09 */
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{{0, 0},
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{3, 3},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x0a */
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{{1, 1},
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{3, 3},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x0b */
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{{0, 1},
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{3, 3},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x0c */
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{{2, 3},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x0d */
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{{0, 0},
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{2, 3},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x0e */
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{{1, 3},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 1, 0, /* 0x0f */
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{{0, 3},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x10 */
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{{4, 4},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x11 */
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{{0, 0},
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{4, 4},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x12 */
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{{1, 1},
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{4, 4},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x13 */
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{{0, 1},
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{4, 4},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x14 */
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{{2, 2},
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{4, 4},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 3, 0, /* 0x15 */
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{{0, 0},
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{2, 2},
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{4, 4},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x16 */
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{{1, 2},
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{4, 4},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x17 */
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{{0, 2},
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{4, 4},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x18 */
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{{3, 4},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x19 */
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{{0, 0},
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{3, 4},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x1a */
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{{1, 1},
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{3, 4},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x1b */
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{{0, 1},
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{3, 4},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x1c */
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{{2, 4},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x1d */
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{{0, 0},
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{2, 4},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x1e */
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{{1, 4},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 1, 0, /* 0x1f */
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{{0, 4},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x20 */
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{{5, 5},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x21 */
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{{0, 0},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x22 */
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{{1, 1},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x23 */
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{{0, 1},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x24 */
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{{2, 2},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 3, 0, /* 0x25 */
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{{0, 0},
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{2, 2},
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{5, 5},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x26 */
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{{1, 2},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x27 */
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{{0, 2},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x28 */
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{{3, 3},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 3, 0, /* 0x29 */
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{{0, 0},
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{3, 3},
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{5, 5},
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{0, 0}
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}
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},
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{0, 0, 3, 0, /* 0x2a */
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{{1, 1},
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{3, 3},
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{5, 5},
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{0, 0}
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}
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},
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{1, 0, 3, 0, /* 0x2b */
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{{0, 1},
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{3, 3},
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{5, 5},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x2c */
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{{2, 3},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 3, 0, /* 0x2d */
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{{0, 0},
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{2, 3},
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{5, 5},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x2e */
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{{1, 3},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x2f */
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{{0, 3},
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{5, 5},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 1, 0, /* 0x30 */
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{{4, 5},
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{0, 0},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x31 */
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{{0, 0},
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{4, 5},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x32 */
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{{1, 1},
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{4, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x33 */
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{{0, 1},
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{4, 5},
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{0, 0},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x34 */
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{{2, 2},
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{4, 5},
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{0, 0},
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{0, 0}
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}
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},
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{1, 0, 3, 0, /* 0x35 */
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{{0, 0},
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{2, 2},
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{4, 5},
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{0, 0}
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}
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},
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{0, 0, 2, 0, /* 0x36 */
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{{1, 2},
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|
{4, 5},
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|
{0, 0},
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{0, 0}
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}
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},
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{1, 0, 2, 0, /* 0x37 */
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{{0, 2},
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|
{4, 5},
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{0, 0},
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{0, 0}
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}
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},
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|
{0, 0, 1, 0, /* 0x38 */
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{{3, 5},
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|
{0, 0},
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|
{0, 0},
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|
{0, 0}
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}
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|
},
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|
{1, 0, 2, 0, /* 0x39 */
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|
{{0, 0},
|
|
{3, 5},
|
|
{0, 0},
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|
{0, 0}
|
|
}
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|
},
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|
{0, 0, 2, 0, /* 0x3a */
|
|
{{1, 1},
|
|
{3, 5},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
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|
{1, 0, 2, 0, /* 0x3b */
|
|
{{0, 1},
|
|
{3, 5},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x3c */
|
|
{{2, 5},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x3d */
|
|
{{0, 0},
|
|
{2, 5},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x3e */
|
|
{{1, 5},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 1, 0, /* 0x3f */
|
|
{{0, 5},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x40 */
|
|
{{6, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x41 */
|
|
{{0, 0},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x42 */
|
|
{{1, 1},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x43 */
|
|
{{0, 1},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x44 */
|
|
{{2, 2},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x45 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x46 */
|
|
{{1, 2},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x47 */
|
|
{{0, 2},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x48 */
|
|
{{3, 3},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x49 */
|
|
{{0, 0},
|
|
{3, 3},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 3, 0, /* 0x4a */
|
|
{{1, 1},
|
|
{3, 3},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x4b */
|
|
{{0, 1},
|
|
{3, 3},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x4c */
|
|
{{2, 3},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x4d */
|
|
{{0, 0},
|
|
{2, 3},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x4e */
|
|
{{1, 3},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x4f */
|
|
{{0, 3},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x50 */
|
|
{{4, 4},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x51 */
|
|
{{0, 0},
|
|
{4, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 3, 0, /* 0x52 */
|
|
{{1, 1},
|
|
{4, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x53 */
|
|
{{0, 1},
|
|
{4, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 3, 0, /* 0x54 */
|
|
{{2, 2},
|
|
{4, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 4, 0, /* 0x55 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{4, 4},
|
|
{6, 6}
|
|
}
|
|
},
|
|
{0, 0, 3, 0, /* 0x56 */
|
|
{{1, 2},
|
|
{4, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x57 */
|
|
{{0, 2},
|
|
{4, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x58 */
|
|
{{3, 4},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x59 */
|
|
{{0, 0},
|
|
{3, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 3, 0, /* 0x5a */
|
|
{{1, 1},
|
|
{3, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x5b */
|
|
{{0, 1},
|
|
{3, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x5c */
|
|
{{2, 4},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x5d */
|
|
{{0, 0},
|
|
{2, 4},
|
|
{6, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x5e */
|
|
{{1, 4},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x5f */
|
|
{{0, 4},
|
|
{6, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x60 */
|
|
{{5, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x61 */
|
|
{{0, 0},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x62 */
|
|
{{1, 1},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x63 */
|
|
{{0, 1},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x64 */
|
|
{{2, 2},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x65 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{5, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x66 */
|
|
{{1, 2},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x67 */
|
|
{{0, 2},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x68 */
|
|
{{3, 3},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x69 */
|
|
{{0, 0},
|
|
{3, 3},
|
|
{5, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 3, 0, /* 0x6a */
|
|
{{1, 1},
|
|
{3, 3},
|
|
{5, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x6b */
|
|
{{0, 1},
|
|
{3, 3},
|
|
{5, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x6c */
|
|
{{2, 3},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x6d */
|
|
{{0, 0},
|
|
{2, 3},
|
|
{5, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x6e */
|
|
{{1, 3},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x6f */
|
|
{{0, 3},
|
|
{5, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x70 */
|
|
{{4, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x71 */
|
|
{{0, 0},
|
|
{4, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x72 */
|
|
{{1, 1},
|
|
{4, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x73 */
|
|
{{0, 1},
|
|
{4, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x74 */
|
|
{{2, 2},
|
|
{4, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 3, 0, /* 0x75 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{4, 6},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x76 */
|
|
{{1, 2},
|
|
{4, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x77 */
|
|
{{0, 2},
|
|
{4, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x78 */
|
|
{{3, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x79 */
|
|
{{0, 0},
|
|
{3, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 2, 0, /* 0x7a */
|
|
{{1, 1},
|
|
{3, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x7b */
|
|
{{0, 1},
|
|
{3, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x7c */
|
|
{{2, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 2, 0, /* 0x7d */
|
|
{{0, 0},
|
|
{2, 6},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 0, 1, 0, /* 0x7e */
|
|
{{1, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 0, 1, 0, /* 0x7f */
|
|
{{0, 6},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0x80 */
|
|
{{7, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0x81 */
|
|
{{0, 0},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x82 */
|
|
{{1, 1},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0x83 */
|
|
{{0, 1},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x84 */
|
|
{{2, 2},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x85 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x86 */
|
|
{{1, 2},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0x87 */
|
|
{{0, 2},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x88 */
|
|
{{3, 3},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x89 */
|
|
{{0, 0},
|
|
{3, 3},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0x8a */
|
|
{{1, 1},
|
|
{3, 3},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x8b */
|
|
{{0, 1},
|
|
{3, 3},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x8c */
|
|
{{2, 3},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x8d */
|
|
{{0, 0},
|
|
{2, 3},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x8e */
|
|
{{1, 3},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0x8f */
|
|
{{0, 3},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x90 */
|
|
{{4, 4},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x91 */
|
|
{{0, 0},
|
|
{4, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0x92 */
|
|
{{1, 1},
|
|
{4, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x93 */
|
|
{{0, 1},
|
|
{4, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0x94 */
|
|
{{2, 2},
|
|
{4, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0x95 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{4, 4},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0x96 */
|
|
{{1, 2},
|
|
{4, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x97 */
|
|
{{0, 2},
|
|
{4, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x98 */
|
|
{{3, 4},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x99 */
|
|
{{0, 0},
|
|
{3, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0x9a */
|
|
{{1, 1},
|
|
{3, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x9b */
|
|
{{0, 1},
|
|
{3, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x9c */
|
|
{{2, 4},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0x9d */
|
|
{{0, 0},
|
|
{2, 4},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0x9e */
|
|
{{1, 4},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0x9f */
|
|
{{0, 4},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xa0 */
|
|
{{5, 5},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xa1 */
|
|
{{0, 0},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xa2 */
|
|
{{1, 1},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xa3 */
|
|
{{0, 1},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xa4 */
|
|
{{2, 2},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0xa5 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{5, 5},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xa6 */
|
|
{{1, 2},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xa7 */
|
|
{{0, 2},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xa8 */
|
|
{{3, 3},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0xa9 */
|
|
{{0, 0},
|
|
{3, 3},
|
|
{5, 5},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{0, 1, 4, 0, /* 0xaa */
|
|
{{1, 1},
|
|
{3, 3},
|
|
{5, 5},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0xab */
|
|
{{0, 1},
|
|
{3, 3},
|
|
{5, 5},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xac */
|
|
{{2, 3},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0xad */
|
|
{{0, 0},
|
|
{2, 3},
|
|
{5, 5},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xae */
|
|
{{1, 3},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xaf */
|
|
{{0, 3},
|
|
{5, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xb0 */
|
|
{{4, 5},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xb1 */
|
|
{{0, 0},
|
|
{4, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xb2 */
|
|
{{1, 1},
|
|
{4, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xb3 */
|
|
{{0, 1},
|
|
{4, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xb4 */
|
|
{{2, 2},
|
|
{4, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0xb5 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{4, 5},
|
|
{7, 7}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xb6 */
|
|
{{1, 2},
|
|
{4, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xb7 */
|
|
{{0, 2},
|
|
{4, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xb8 */
|
|
{{3, 5},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xb9 */
|
|
{{0, 0},
|
|
{3, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xba */
|
|
{{1, 1},
|
|
{3, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xbb */
|
|
{{0, 1},
|
|
{3, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xbc */
|
|
{{2, 5},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xbd */
|
|
{{0, 0},
|
|
{2, 5},
|
|
{7, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xbe */
|
|
{{1, 5},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xbf */
|
|
{{0, 5},
|
|
{7, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0xc0 */
|
|
{{6, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xc1 */
|
|
{{0, 0},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xc2 */
|
|
{{1, 1},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xc3 */
|
|
{{0, 1},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xc4 */
|
|
{{2, 2},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xc5 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xc6 */
|
|
{{1, 2},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xc7 */
|
|
{{0, 2},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xc8 */
|
|
{{3, 3},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xc9 */
|
|
{{0, 0},
|
|
{3, 3},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xca */
|
|
{{1, 1},
|
|
{3, 3},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xcb */
|
|
{{0, 1},
|
|
{3, 3},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xcc */
|
|
{{2, 3},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xcd */
|
|
{{0, 0},
|
|
{2, 3},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xce */
|
|
{{1, 3},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xcf */
|
|
{{0, 3},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xd0 */
|
|
{{4, 4},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xd1 */
|
|
{{0, 0},
|
|
{4, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xd2 */
|
|
{{1, 1},
|
|
{4, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xd3 */
|
|
{{0, 1},
|
|
{4, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xd4 */
|
|
{{2, 2},
|
|
{4, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 4, 0, /* 0xd5 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{4, 4},
|
|
{6, 7}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xd6 */
|
|
{{1, 2},
|
|
{4, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xd7 */
|
|
{{0, 2},
|
|
{4, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xd8 */
|
|
{{3, 4},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xd9 */
|
|
{{0, 0},
|
|
{3, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xda */
|
|
{{1, 1},
|
|
{3, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xdb */
|
|
{{0, 1},
|
|
{3, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xdc */
|
|
{{2, 4},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xdd */
|
|
{{0, 0},
|
|
{2, 4},
|
|
{6, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xde */
|
|
{{1, 4},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xdf */
|
|
{{0, 4},
|
|
{6, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0xe0 */
|
|
{{5, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xe1 */
|
|
{{0, 0},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xe2 */
|
|
{{1, 1},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xe3 */
|
|
{{0, 1},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xe4 */
|
|
{{2, 2},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xe5 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{5, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xe6 */
|
|
{{1, 2},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xe7 */
|
|
{{0, 2},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xe8 */
|
|
{{3, 3},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xe9 */
|
|
{{0, 0},
|
|
{3, 3},
|
|
{5, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 3, 0, /* 0xea */
|
|
{{1, 1},
|
|
{3, 3},
|
|
{5, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xeb */
|
|
{{0, 1},
|
|
{3, 3},
|
|
{5, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xec */
|
|
{{2, 3},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xed */
|
|
{{0, 0},
|
|
{2, 3},
|
|
{5, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xee */
|
|
{{1, 3},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xef */
|
|
{{0, 3},
|
|
{5, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0xf0 */
|
|
{{4, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xf1 */
|
|
{{0, 0},
|
|
{4, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xf2 */
|
|
{{1, 1},
|
|
{4, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xf3 */
|
|
{{0, 1},
|
|
{4, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xf4 */
|
|
{{2, 2},
|
|
{4, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 3, 0, /* 0xf5 */
|
|
{{0, 0},
|
|
{2, 2},
|
|
{4, 7},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xf6 */
|
|
{{1, 2},
|
|
{4, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xf7 */
|
|
{{0, 2},
|
|
{4, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0xf8 */
|
|
{{3, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xf9 */
|
|
{{0, 0},
|
|
{3, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 2, 0, /* 0xfa */
|
|
{{1, 1},
|
|
{3, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xfb */
|
|
{{0, 1},
|
|
{3, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0xfc */
|
|
{{2, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 2, 0, /* 0xfd */
|
|
{{0, 0},
|
|
{2, 7},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{0, 1, 1, 0, /* 0xfe */
|
|
{{1, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
},
|
|
{1, 1, 1, 0, /* 0xff */
|
|
{{0, 7},
|
|
{0, 0},
|
|
{0, 0},
|
|
{0, 0}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
int
|
|
sctp_is_address_in_scope(struct sctp_ifa *ifa,
|
|
struct sctp_scoping *scope,
|
|
int do_update)
|
|
{
|
|
if ((scope->loopback_scope == 0) &&
|
|
(ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
|
|
/*
|
|
* skip loopback if not in scope *
|
|
*/
|
|
return (0);
|
|
}
|
|
switch (ifa->address.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (scope->ipv4_addr_legal) {
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = &ifa->address.sin;
|
|
if (sin->sin_addr.s_addr == 0) {
|
|
/* not in scope , unspecified */
|
|
return (0);
|
|
}
|
|
if ((scope->ipv4_local_scope == 0) &&
|
|
(IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
|
|
/* private address not in scope */
|
|
return (0);
|
|
}
|
|
} else {
|
|
return (0);
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (scope->ipv6_addr_legal) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
/*
|
|
* Must update the flags, bummer, which means any
|
|
* IFA locks must now be applied HERE <->
|
|
*/
|
|
if (do_update) {
|
|
sctp_gather_internal_ifa_flags(ifa);
|
|
}
|
|
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
|
|
return (0);
|
|
}
|
|
/* ok to use deprecated addresses? */
|
|
sin6 = &ifa->address.sin6;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/* skip unspecifed addresses */
|
|
return (0);
|
|
}
|
|
if ( /* (local_scope == 0) && */
|
|
(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
|
|
return (0);
|
|
}
|
|
if ((scope->site_scope == 0) &&
|
|
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
|
|
return (0);
|
|
}
|
|
} else {
|
|
return (0);
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
static struct mbuf *
|
|
sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
|
|
{
|
|
#if defined(INET) || defined(INET6)
|
|
struct sctp_paramhdr *parmh;
|
|
struct mbuf *mret;
|
|
uint16_t plen;
|
|
#endif
|
|
|
|
switch (ifa->address.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
|
|
break;
|
|
#endif
|
|
default:
|
|
return (m);
|
|
}
|
|
#if defined(INET) || defined(INET6)
|
|
if (M_TRAILINGSPACE(m) >= plen) {
|
|
/* easy side we just drop it on the end */
|
|
parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
|
|
mret = m;
|
|
} else {
|
|
/* Need more space */
|
|
mret = m;
|
|
while (SCTP_BUF_NEXT(mret) != NULL) {
|
|
mret = SCTP_BUF_NEXT(mret);
|
|
}
|
|
SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (SCTP_BUF_NEXT(mret) == NULL) {
|
|
/* We are hosed, can't add more addresses */
|
|
return (m);
|
|
}
|
|
mret = SCTP_BUF_NEXT(mret);
|
|
parmh = mtod(mret, struct sctp_paramhdr *);
|
|
}
|
|
/* now add the parameter */
|
|
switch (ifa->address.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
{
|
|
struct sctp_ipv4addr_param *ipv4p;
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = &ifa->address.sin;
|
|
ipv4p = (struct sctp_ipv4addr_param *)parmh;
|
|
parmh->param_type = htons(SCTP_IPV4_ADDRESS);
|
|
parmh->param_length = htons(plen);
|
|
ipv4p->addr = sin->sin_addr.s_addr;
|
|
SCTP_BUF_LEN(mret) += plen;
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
{
|
|
struct sctp_ipv6addr_param *ipv6p;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = &ifa->address.sin6;
|
|
ipv6p = (struct sctp_ipv6addr_param *)parmh;
|
|
parmh->param_type = htons(SCTP_IPV6_ADDRESS);
|
|
parmh->param_length = htons(plen);
|
|
memcpy(ipv6p->addr, &sin6->sin6_addr,
|
|
sizeof(ipv6p->addr));
|
|
/* clear embedded scope in the address */
|
|
in6_clearscope((struct in6_addr *)ipv6p->addr);
|
|
SCTP_BUF_LEN(mret) += plen;
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
return (m);
|
|
}
|
|
if (len != NULL) {
|
|
*len += plen;
|
|
}
|
|
return (mret);
|
|
#endif
|
|
}
|
|
|
|
|
|
struct mbuf *
|
|
sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
|
|
struct sctp_scoping *scope,
|
|
struct mbuf *m_at, int cnt_inits_to,
|
|
uint16_t * padding_len, uint16_t * chunk_len)
|
|
{
|
|
struct sctp_vrf *vrf = NULL;
|
|
int cnt, limit_out = 0, total_count;
|
|
uint32_t vrf_id;
|
|
|
|
vrf_id = inp->def_vrf_id;
|
|
SCTP_IPI_ADDR_RLOCK();
|
|
vrf = sctp_find_vrf(vrf_id);
|
|
if (vrf == NULL) {
|
|
SCTP_IPI_ADDR_RUNLOCK();
|
|
return (m_at);
|
|
}
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
struct sctp_ifa *sctp_ifap;
|
|
struct sctp_ifn *sctp_ifnp;
|
|
|
|
cnt = cnt_inits_to;
|
|
if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
|
|
limit_out = 1;
|
|
cnt = SCTP_ADDRESS_LIMIT;
|
|
goto skip_count;
|
|
}
|
|
LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
|
|
if ((scope->loopback_scope == 0) &&
|
|
SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
|
|
/*
|
|
* Skip loopback devices if loopback_scope
|
|
* not set
|
|
*/
|
|
continue;
|
|
}
|
|
LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifap->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifap->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
|
|
continue;
|
|
}
|
|
if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
|
|
continue;
|
|
}
|
|
cnt++;
|
|
if (cnt > SCTP_ADDRESS_LIMIT) {
|
|
break;
|
|
}
|
|
}
|
|
if (cnt > SCTP_ADDRESS_LIMIT) {
|
|
break;
|
|
}
|
|
}
|
|
skip_count:
|
|
if (cnt > 1) {
|
|
total_count = 0;
|
|
LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
|
|
cnt = 0;
|
|
if ((scope->loopback_scope == 0) &&
|
|
SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
|
|
/*
|
|
* Skip loopback devices if
|
|
* loopback_scope not set
|
|
*/
|
|
continue;
|
|
}
|
|
LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifap->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifap->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
|
|
continue;
|
|
}
|
|
if (sctp_is_address_in_scope(sctp_ifap,
|
|
scope, 0) == 0) {
|
|
continue;
|
|
}
|
|
if ((chunk_len != NULL) &&
|
|
(padding_len != NULL) &&
|
|
(*padding_len > 0)) {
|
|
memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
|
|
SCTP_BUF_LEN(m_at) += *padding_len;
|
|
*chunk_len += *padding_len;
|
|
*padding_len = 0;
|
|
}
|
|
m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
|
|
if (limit_out) {
|
|
cnt++;
|
|
total_count++;
|
|
if (cnt >= 2) {
|
|
/* two from each
|
|
* address */
|
|
break;
|
|
}
|
|
if (total_count > SCTP_ADDRESS_LIMIT) {
|
|
/* No more addresses */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
struct sctp_laddr *laddr;
|
|
|
|
cnt = cnt_inits_to;
|
|
/* First, how many ? */
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
continue;
|
|
}
|
|
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
|
|
/*
|
|
* Address being deleted by the system, dont
|
|
* list.
|
|
*/
|
|
continue;
|
|
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
|
|
/*
|
|
* Address being deleted on this ep don't
|
|
* list.
|
|
*/
|
|
continue;
|
|
}
|
|
if (sctp_is_address_in_scope(laddr->ifa,
|
|
scope, 1) == 0) {
|
|
continue;
|
|
}
|
|
cnt++;
|
|
}
|
|
/*
|
|
* To get through a NAT we only list addresses if we have
|
|
* more than one. That way if you just bind a single address
|
|
* we let the source of the init dictate our address.
|
|
*/
|
|
if (cnt > 1) {
|
|
cnt = cnt_inits_to;
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
continue;
|
|
}
|
|
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
|
|
continue;
|
|
}
|
|
if (sctp_is_address_in_scope(laddr->ifa,
|
|
scope, 0) == 0) {
|
|
continue;
|
|
}
|
|
if ((chunk_len != NULL) &&
|
|
(padding_len != NULL) &&
|
|
(*padding_len > 0)) {
|
|
memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
|
|
SCTP_BUF_LEN(m_at) += *padding_len;
|
|
*chunk_len += *padding_len;
|
|
*padding_len = 0;
|
|
}
|
|
m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
|
|
cnt++;
|
|
if (cnt >= SCTP_ADDRESS_LIMIT) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
SCTP_IPI_ADDR_RUNLOCK();
|
|
return (m_at);
|
|
}
|
|
|
|
static struct sctp_ifa *
|
|
sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
|
|
uint8_t dest_is_loop,
|
|
uint8_t dest_is_priv,
|
|
sa_family_t fam)
|
|
{
|
|
uint8_t dest_is_global = 0;
|
|
|
|
/* dest_is_priv is true if destination is a private address */
|
|
/* dest_is_loop is true if destination is a loopback addresses */
|
|
|
|
/**
|
|
* Here we determine if its a preferred address. A preferred address
|
|
* means it is the same scope or higher scope then the destination.
|
|
* L = loopback, P = private, G = global
|
|
* -----------------------------------------
|
|
* src | dest | result
|
|
* ----------------------------------------
|
|
* L | L | yes
|
|
* -----------------------------------------
|
|
* P | L | yes-v4 no-v6
|
|
* -----------------------------------------
|
|
* G | L | yes-v4 no-v6
|
|
* -----------------------------------------
|
|
* L | P | no
|
|
* -----------------------------------------
|
|
* P | P | yes
|
|
* -----------------------------------------
|
|
* G | P | no
|
|
* -----------------------------------------
|
|
* L | G | no
|
|
* -----------------------------------------
|
|
* P | G | no
|
|
* -----------------------------------------
|
|
* G | G | yes
|
|
* -----------------------------------------
|
|
*/
|
|
|
|
if (ifa->address.sa.sa_family != fam) {
|
|
/* forget mis-matched family */
|
|
return (NULL);
|
|
}
|
|
if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
|
|
dest_is_global = 1;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
|
|
/* Ok the address may be ok */
|
|
#ifdef INET6
|
|
if (fam == AF_INET6) {
|
|
/* ok to use deprecated addresses? no lets not! */
|
|
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
|
|
return (NULL);
|
|
}
|
|
if (ifa->src_is_priv && !ifa->src_is_loop) {
|
|
if (dest_is_loop) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
|
|
return (NULL);
|
|
}
|
|
}
|
|
if (ifa->src_is_glob) {
|
|
if (dest_is_loop) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
|
|
return (NULL);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* Now that we know what is what, implement or table this could in
|
|
* theory be done slicker (it used to be), but this is
|
|
* straightforward and easier to validate :-)
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
|
|
ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
|
|
dest_is_loop, dest_is_priv, dest_is_global);
|
|
|
|
if ((ifa->src_is_loop) && (dest_is_priv)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
|
|
return (NULL);
|
|
}
|
|
if ((ifa->src_is_glob) && (dest_is_priv)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
|
|
return (NULL);
|
|
}
|
|
if ((ifa->src_is_loop) && (dest_is_global)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
|
|
return (NULL);
|
|
}
|
|
if ((ifa->src_is_priv) && (dest_is_global)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
|
|
return (NULL);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
|
|
/* its a preferred address */
|
|
return (ifa);
|
|
}
|
|
|
|
static struct sctp_ifa *
|
|
sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
|
|
uint8_t dest_is_loop,
|
|
uint8_t dest_is_priv,
|
|
sa_family_t fam)
|
|
{
|
|
uint8_t dest_is_global = 0;
|
|
|
|
/**
|
|
* Here we determine if its a acceptable address. A acceptable
|
|
* address means it is the same scope or higher scope but we can
|
|
* allow for NAT which means its ok to have a global dest and a
|
|
* private src.
|
|
*
|
|
* L = loopback, P = private, G = global
|
|
* -----------------------------------------
|
|
* src | dest | result
|
|
* -----------------------------------------
|
|
* L | L | yes
|
|
* -----------------------------------------
|
|
* P | L | yes-v4 no-v6
|
|
* -----------------------------------------
|
|
* G | L | yes
|
|
* -----------------------------------------
|
|
* L | P | no
|
|
* -----------------------------------------
|
|
* P | P | yes
|
|
* -----------------------------------------
|
|
* G | P | yes - May not work
|
|
* -----------------------------------------
|
|
* L | G | no
|
|
* -----------------------------------------
|
|
* P | G | yes - May not work
|
|
* -----------------------------------------
|
|
* G | G | yes
|
|
* -----------------------------------------
|
|
*/
|
|
|
|
if (ifa->address.sa.sa_family != fam) {
|
|
/* forget non matching family */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
|
|
ifa->address.sa.sa_family, fam);
|
|
return (NULL);
|
|
}
|
|
/* Ok the address may be ok */
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
|
|
dest_is_loop, dest_is_priv);
|
|
if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
|
|
dest_is_global = 1;
|
|
}
|
|
#ifdef INET6
|
|
if (fam == AF_INET6) {
|
|
/* ok to use deprecated addresses? */
|
|
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
|
|
return (NULL);
|
|
}
|
|
if (ifa->src_is_priv) {
|
|
/* Special case, linklocal to loop */
|
|
if (dest_is_loop)
|
|
return (NULL);
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* Now that we know what is what, implement our table. This could in
|
|
* theory be done slicker (it used to be), but this is
|
|
* straightforward and easier to validate :-)
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
|
|
ifa->src_is_loop,
|
|
dest_is_priv);
|
|
if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
|
|
return (NULL);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
|
|
ifa->src_is_loop,
|
|
dest_is_global);
|
|
if ((ifa->src_is_loop == 1) && (dest_is_global)) {
|
|
return (NULL);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
|
|
/* its an acceptable address */
|
|
return (ifa);
|
|
}
|
|
|
|
int
|
|
sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
|
|
{
|
|
struct sctp_laddr *laddr;
|
|
|
|
if (stcb == NULL) {
|
|
/* There are no restrictions, no TCB :-) */
|
|
return (0);
|
|
}
|
|
LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
|
|
__func__);
|
|
continue;
|
|
}
|
|
if (laddr->ifa == ifa) {
|
|
/* Yes it is on the list */
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
int
|
|
sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
|
|
{
|
|
struct sctp_laddr *laddr;
|
|
|
|
if (ifa == NULL)
|
|
return (0);
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
|
|
__func__);
|
|
continue;
|
|
}
|
|
if ((laddr->ifa == ifa) && laddr->action == 0)
|
|
/* same pointer */
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
|
|
static struct sctp_ifa *
|
|
sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
|
|
sctp_route_t * ro,
|
|
uint32_t vrf_id,
|
|
int non_asoc_addr_ok,
|
|
uint8_t dest_is_priv,
|
|
uint8_t dest_is_loop,
|
|
sa_family_t fam)
|
|
{
|
|
struct sctp_laddr *laddr, *starting_point;
|
|
void *ifn;
|
|
int resettotop = 0;
|
|
struct sctp_ifn *sctp_ifn;
|
|
struct sctp_ifa *sctp_ifa, *sifa;
|
|
struct sctp_vrf *vrf;
|
|
uint32_t ifn_index;
|
|
|
|
vrf = sctp_find_vrf(vrf_id);
|
|
if (vrf == NULL)
|
|
return (NULL);
|
|
|
|
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
|
|
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
|
|
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
|
|
/*
|
|
* first question, is the ifn we will emit on in our list, if so, we
|
|
* want such an address. Note that we first looked for a preferred
|
|
* address.
|
|
*/
|
|
if (sctp_ifn) {
|
|
/* is a preferred one on the interface we route out? */
|
|
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
|
|
(non_asoc_addr_ok == 0))
|
|
continue;
|
|
sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
|
|
dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (sctp_is_addr_in_ep(inp, sifa)) {
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* ok, now we now need to find one on the list of the addresses. We
|
|
* can't get one on the emitting interface so let's find first a
|
|
* preferred one. If not that an acceptable one otherwise... we
|
|
* return NULL.
|
|
*/
|
|
starting_point = inp->next_addr_touse;
|
|
once_again:
|
|
if (inp->next_addr_touse == NULL) {
|
|
inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
|
|
resettotop = 1;
|
|
}
|
|
for (laddr = inp->next_addr_touse; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
|
|
/* address is being deleted */
|
|
continue;
|
|
}
|
|
sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
if (resettotop == 0) {
|
|
inp->next_addr_touse = NULL;
|
|
goto once_again;
|
|
}
|
|
inp->next_addr_touse = starting_point;
|
|
resettotop = 0;
|
|
once_again_too:
|
|
if (inp->next_addr_touse == NULL) {
|
|
inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
|
|
resettotop = 1;
|
|
}
|
|
/* ok, what about an acceptable address in the inp */
|
|
for (laddr = inp->next_addr_touse; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
|
|
/* address is being deleted */
|
|
continue;
|
|
}
|
|
sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
if (resettotop == 0) {
|
|
inp->next_addr_touse = NULL;
|
|
goto once_again_too;
|
|
}
|
|
/*
|
|
* no address bound can be a source for the destination we are in
|
|
* trouble
|
|
*/
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
|
|
static struct sctp_ifa *
|
|
sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
sctp_route_t * ro,
|
|
uint32_t vrf_id,
|
|
uint8_t dest_is_priv,
|
|
uint8_t dest_is_loop,
|
|
int non_asoc_addr_ok,
|
|
sa_family_t fam)
|
|
{
|
|
struct sctp_laddr *laddr, *starting_point;
|
|
void *ifn;
|
|
struct sctp_ifn *sctp_ifn;
|
|
struct sctp_ifa *sctp_ifa, *sifa;
|
|
uint8_t start_at_beginning = 0;
|
|
struct sctp_vrf *vrf;
|
|
uint32_t ifn_index;
|
|
|
|
/*
|
|
* first question, is the ifn we will emit on in our list, if so, we
|
|
* want that one.
|
|
*/
|
|
vrf = sctp_find_vrf(vrf_id);
|
|
if (vrf == NULL)
|
|
return (NULL);
|
|
|
|
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
|
|
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
|
|
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
|
|
|
|
/*
|
|
* first question, is the ifn we will emit on in our list? If so,
|
|
* we want that one. First we look for a preferred. Second, we go
|
|
* for an acceptable.
|
|
*/
|
|
if (sctp_ifn) {
|
|
/* first try for a preferred address on the ep */
|
|
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
|
|
continue;
|
|
if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
|
|
sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
}
|
|
/* next try for an acceptable address on the ep */
|
|
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
|
|
continue;
|
|
if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
|
|
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
}
|
|
|
|
}
|
|
/*
|
|
* if we can't find one like that then we must look at all addresses
|
|
* bound to pick one at first preferable then secondly acceptable.
|
|
*/
|
|
starting_point = stcb->asoc.last_used_address;
|
|
sctp_from_the_top:
|
|
if (stcb->asoc.last_used_address == NULL) {
|
|
start_at_beginning = 1;
|
|
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
|
|
}
|
|
/* search beginning with the last used address */
|
|
for (laddr = stcb->asoc.last_used_address; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
|
|
/* address is being deleted */
|
|
continue;
|
|
}
|
|
sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
stcb->asoc.last_used_address = laddr;
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
if (start_at_beginning == 0) {
|
|
stcb->asoc.last_used_address = NULL;
|
|
goto sctp_from_the_top;
|
|
}
|
|
/* now try for any higher scope than the destination */
|
|
stcb->asoc.last_used_address = starting_point;
|
|
start_at_beginning = 0;
|
|
sctp_from_the_top2:
|
|
if (stcb->asoc.last_used_address == NULL) {
|
|
start_at_beginning = 1;
|
|
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
|
|
}
|
|
/* search beginning with the last used address */
|
|
for (laddr = stcb->asoc.last_used_address; laddr;
|
|
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
|
|
if (laddr->ifa == NULL) {
|
|
/* address has been removed */
|
|
continue;
|
|
}
|
|
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
|
|
/* address is being deleted */
|
|
continue;
|
|
}
|
|
sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/* on the no-no list */
|
|
continue;
|
|
}
|
|
stcb->asoc.last_used_address = laddr;
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
if (start_at_beginning == 0) {
|
|
stcb->asoc.last_used_address = NULL;
|
|
goto sctp_from_the_top2;
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static struct sctp_ifa *
|
|
sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
|
|
struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
int non_asoc_addr_ok,
|
|
uint8_t dest_is_loop,
|
|
uint8_t dest_is_priv,
|
|
int addr_wanted,
|
|
sa_family_t fam,
|
|
sctp_route_t * ro
|
|
)
|
|
{
|
|
struct sctp_ifa *ifa, *sifa;
|
|
int num_eligible_addr = 0;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 sin6, lsa6;
|
|
|
|
if (fam == AF_INET6) {
|
|
memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
|
|
(void)sa6_recoverscope(&sin6);
|
|
}
|
|
#endif /* INET6 */
|
|
LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
|
|
(non_asoc_addr_ok == 0))
|
|
continue;
|
|
sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
#ifdef INET6
|
|
if (fam == AF_INET6 &&
|
|
dest_is_loop &&
|
|
sifa->src_is_loop && sifa->src_is_priv) {
|
|
/*
|
|
* don't allow fe80::1 to be a src on loop ::1, we
|
|
* don't list it to the peer so we will get an
|
|
* abort.
|
|
*/
|
|
continue;
|
|
}
|
|
if (fam == AF_INET6 &&
|
|
IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
|
|
IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
|
|
/* link-local <-> link-local must belong to the same
|
|
* scope. */
|
|
memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
|
|
(void)sa6_recoverscope(&lsa6);
|
|
if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
|
|
continue;
|
|
}
|
|
}
|
|
#endif /* INET6 */
|
|
|
|
/*
|
|
* Check if the IPv6 address matches to next-hop. In the
|
|
* mobile case, old IPv6 address may be not deleted from the
|
|
* interface. Then, the interface has previous and new
|
|
* addresses. We should use one corresponding to the
|
|
* next-hop. (by micchie)
|
|
*/
|
|
#ifdef INET6
|
|
if (stcb && fam == AF_INET6 &&
|
|
sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
|
|
if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
|
|
== 0) {
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET
|
|
/* Avoid topologically incorrect IPv4 address */
|
|
if (stcb && fam == AF_INET &&
|
|
sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
|
|
if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
if (stcb) {
|
|
if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
|
|
continue;
|
|
}
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/*
|
|
* It is restricted for some reason..
|
|
* probably not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
if (num_eligible_addr >= addr_wanted) {
|
|
return (sifa);
|
|
}
|
|
num_eligible_addr++;
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
|
|
struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
int non_asoc_addr_ok,
|
|
uint8_t dest_is_loop,
|
|
uint8_t dest_is_priv,
|
|
sa_family_t fam)
|
|
{
|
|
struct sctp_ifa *ifa, *sifa;
|
|
int num_eligible_addr = 0;
|
|
|
|
LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((ifa->address.sa.sa_family == AF_INET6) &&
|
|
(stcb != NULL) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
|
|
(non_asoc_addr_ok == 0)) {
|
|
continue;
|
|
}
|
|
sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL) {
|
|
continue;
|
|
}
|
|
if (stcb) {
|
|
if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
|
|
continue;
|
|
}
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/*
|
|
* It is restricted for some reason..
|
|
* probably not yet added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
num_eligible_addr++;
|
|
}
|
|
return (num_eligible_addr);
|
|
}
|
|
|
|
static struct sctp_ifa *
|
|
sctp_choose_boundall(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
sctp_route_t * ro,
|
|
uint32_t vrf_id,
|
|
uint8_t dest_is_priv,
|
|
uint8_t dest_is_loop,
|
|
int non_asoc_addr_ok,
|
|
sa_family_t fam)
|
|
{
|
|
int cur_addr_num = 0, num_preferred = 0;
|
|
void *ifn;
|
|
struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
|
|
struct sctp_ifa *sctp_ifa, *sifa;
|
|
uint32_t ifn_index;
|
|
struct sctp_vrf *vrf;
|
|
#ifdef INET
|
|
int retried = 0;
|
|
#endif
|
|
|
|
/*-
|
|
* For boundall we can use any address in the association.
|
|
* If non_asoc_addr_ok is set we can use any address (at least in
|
|
* theory). So we look for preferred addresses first. If we find one,
|
|
* we use it. Otherwise we next try to get an address on the
|
|
* interface, which we should be able to do (unless non_asoc_addr_ok
|
|
* is false and we are routed out that way). In these cases where we
|
|
* can't use the address of the interface we go through all the
|
|
* ifn's looking for an address we can use and fill that in. Punting
|
|
* means we send back address 0, which will probably cause problems
|
|
* actually since then IP will fill in the address of the route ifn,
|
|
* which means we probably already rejected it.. i.e. here comes an
|
|
* abort :-<.
|
|
*/
|
|
vrf = sctp_find_vrf(vrf_id);
|
|
if (vrf == NULL)
|
|
return (NULL);
|
|
|
|
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
|
|
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
|
|
emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
|
|
if (sctp_ifn == NULL) {
|
|
/* ?? We don't have this guy ?? */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
|
|
goto bound_all_plan_b;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
|
|
ifn_index, sctp_ifn->ifn_name);
|
|
|
|
if (net) {
|
|
cur_addr_num = net->indx_of_eligible_next_to_use;
|
|
}
|
|
num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
|
|
inp, stcb,
|
|
non_asoc_addr_ok,
|
|
dest_is_loop,
|
|
dest_is_priv, fam);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
|
|
num_preferred, sctp_ifn->ifn_name);
|
|
if (num_preferred == 0) {
|
|
/*
|
|
* no eligible addresses, we must use some other interface
|
|
* address if we can find one.
|
|
*/
|
|
goto bound_all_plan_b;
|
|
}
|
|
/*
|
|
* Ok we have num_eligible_addr set with how many we can use, this
|
|
* may vary from call to call due to addresses being deprecated
|
|
* etc..
|
|
*/
|
|
if (cur_addr_num >= num_preferred) {
|
|
cur_addr_num = 0;
|
|
}
|
|
/*
|
|
* select the nth address from the list (where cur_addr_num is the
|
|
* nth) and 0 is the first one, 1 is the second one etc...
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
|
|
|
|
sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
|
|
dest_is_priv, cur_addr_num, fam, ro);
|
|
|
|
/* if sctp_ifa is NULL something changed??, fall to plan b. */
|
|
if (sctp_ifa) {
|
|
atomic_add_int(&sctp_ifa->refcount, 1);
|
|
if (net) {
|
|
/* save off where the next one we will want */
|
|
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
|
|
}
|
|
return (sctp_ifa);
|
|
}
|
|
/*
|
|
* plan_b: Look at all interfaces and find a preferred address. If
|
|
* no preferred fall through to plan_c.
|
|
*/
|
|
bound_all_plan_b:
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
|
|
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
|
|
sctp_ifn->ifn_name);
|
|
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
|
|
/* wrong base scope */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
|
|
continue;
|
|
}
|
|
if ((sctp_ifn == looked_at) && looked_at) {
|
|
/* already looked at this guy */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
|
|
continue;
|
|
}
|
|
num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
|
|
dest_is_loop, dest_is_priv, fam);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2,
|
|
"Found ifn:%p %d preferred source addresses\n",
|
|
ifn, num_preferred);
|
|
if (num_preferred == 0) {
|
|
/* None on this interface. */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
|
|
continue;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2,
|
|
"num preferred:%d on interface:%p cur_addr_num:%d\n",
|
|
num_preferred, (void *)sctp_ifn, cur_addr_num);
|
|
|
|
/*
|
|
* Ok we have num_eligible_addr set with how many we can
|
|
* use, this may vary from call to call due to addresses
|
|
* being deprecated etc..
|
|
*/
|
|
if (cur_addr_num >= num_preferred) {
|
|
cur_addr_num = 0;
|
|
}
|
|
sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
|
|
dest_is_priv, cur_addr_num, fam, ro);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (net) {
|
|
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
|
|
cur_addr_num);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
|
|
}
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
return (sifa);
|
|
}
|
|
#ifdef INET
|
|
again_with_private_addresses_allowed:
|
|
#endif
|
|
/* plan_c: do we have an acceptable address on the emit interface */
|
|
sifa = NULL;
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
|
|
if (emit_ifn == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
|
|
goto plan_d;
|
|
}
|
|
LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
|
|
#ifdef INET
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin.sin_addr) != 0)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
|
|
(non_asoc_addr_ok == 0)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
|
|
continue;
|
|
}
|
|
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
|
|
continue;
|
|
}
|
|
if (stcb) {
|
|
if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
|
|
sifa = NULL;
|
|
continue;
|
|
}
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/*
|
|
* It is restricted for some reason..
|
|
* probably not yet added.
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
|
|
sifa = NULL;
|
|
continue;
|
|
}
|
|
}
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
goto out;
|
|
}
|
|
plan_d:
|
|
/*
|
|
* plan_d: We are in trouble. No preferred address on the emit
|
|
* interface. And not even a preferred address on all interfaces. Go
|
|
* out and see if we can find an acceptable address somewhere
|
|
* amongst all interfaces.
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
|
|
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
|
|
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
|
|
/* wrong base scope */
|
|
continue;
|
|
}
|
|
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
|
|
#ifdef INET
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
|
|
(non_asoc_addr_ok == 0))
|
|
continue;
|
|
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
|
|
dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (sifa == NULL)
|
|
continue;
|
|
if (stcb) {
|
|
if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
|
|
sifa = NULL;
|
|
continue;
|
|
}
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, sifa)))) {
|
|
/*
|
|
* It is restricted for some
|
|
* reason.. probably not yet added.
|
|
*/
|
|
sifa = NULL;
|
|
continue;
|
|
}
|
|
}
|
|
goto out;
|
|
}
|
|
}
|
|
#ifdef INET
|
|
if (stcb) {
|
|
if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
|
|
stcb->asoc.scope.ipv4_local_scope = 1;
|
|
retried = 1;
|
|
goto again_with_private_addresses_allowed;
|
|
} else if (retried == 1) {
|
|
stcb->asoc.scope.ipv4_local_scope = 0;
|
|
}
|
|
}
|
|
#endif
|
|
out:
|
|
#ifdef INET
|
|
if (sifa) {
|
|
if (retried == 1) {
|
|
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
|
|
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
|
|
/* wrong base scope */
|
|
continue;
|
|
}
|
|
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
|
|
struct sctp_ifa *tmp_sifa;
|
|
|
|
#ifdef INET
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
|
|
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin.sin_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
|
|
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
|
|
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
|
|
continue;
|
|
}
|
|
#endif
|
|
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
|
|
(non_asoc_addr_ok == 0))
|
|
continue;
|
|
tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
|
|
dest_is_loop,
|
|
dest_is_priv, fam);
|
|
if (tmp_sifa == NULL) {
|
|
continue;
|
|
}
|
|
if (tmp_sifa == sifa) {
|
|
continue;
|
|
}
|
|
if (stcb) {
|
|
if (sctp_is_address_in_scope(tmp_sifa,
|
|
&stcb->asoc.scope, 0) == 0) {
|
|
continue;
|
|
}
|
|
if (((non_asoc_addr_ok == 0) &&
|
|
(sctp_is_addr_restricted(stcb, tmp_sifa))) ||
|
|
(non_asoc_addr_ok &&
|
|
(sctp_is_addr_restricted(stcb, tmp_sifa)) &&
|
|
(!sctp_is_addr_pending(stcb, tmp_sifa)))) {
|
|
/*
|
|
* It is restricted
|
|
* for some reason..
|
|
* probably not yet
|
|
* added.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
|
|
(IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
|
|
sctp_add_local_addr_restricted(stcb, tmp_sifa);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
atomic_add_int(&sifa->refcount, 1);
|
|
}
|
|
#endif
|
|
return (sifa);
|
|
}
|
|
|
|
|
|
|
|
/* tcb may be NULL */
|
|
struct sctp_ifa *
|
|
sctp_source_address_selection(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
sctp_route_t * ro,
|
|
struct sctp_nets *net,
|
|
int non_asoc_addr_ok, uint32_t vrf_id)
|
|
{
|
|
struct sctp_ifa *answer;
|
|
uint8_t dest_is_priv, dest_is_loop;
|
|
sa_family_t fam;
|
|
#ifdef INET
|
|
struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
|
|
#endif
|
|
|
|
/**
|
|
* Rules:
|
|
* - Find the route if needed, cache if I can.
|
|
* - Look at interface address in route, Is it in the bound list. If so we
|
|
* have the best source.
|
|
* - If not we must rotate amongst the addresses.
|
|
*
|
|
* Cavets and issues
|
|
*
|
|
* Do we need to pay attention to scope. We can have a private address
|
|
* or a global address we are sourcing or sending to. So if we draw
|
|
* it out
|
|
* zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
|
|
* For V4
|
|
* ------------------------------------------
|
|
* source * dest * result
|
|
* -----------------------------------------
|
|
* <a> Private * Global * NAT
|
|
* -----------------------------------------
|
|
* <b> Private * Private * No problem
|
|
* -----------------------------------------
|
|
* <c> Global * Private * Huh, How will this work?
|
|
* -----------------------------------------
|
|
* <d> Global * Global * No Problem
|
|
*------------------------------------------
|
|
* zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
|
|
* For V6
|
|
*------------------------------------------
|
|
* source * dest * result
|
|
* -----------------------------------------
|
|
* <a> Linklocal * Global *
|
|
* -----------------------------------------
|
|
* <b> Linklocal * Linklocal * No problem
|
|
* -----------------------------------------
|
|
* <c> Global * Linklocal * Huh, How will this work?
|
|
* -----------------------------------------
|
|
* <d> Global * Global * No Problem
|
|
*------------------------------------------
|
|
* zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
|
|
*
|
|
* And then we add to that what happens if there are multiple addresses
|
|
* assigned to an interface. Remember the ifa on a ifn is a linked
|
|
* list of addresses. So one interface can have more than one IP
|
|
* address. What happens if we have both a private and a global
|
|
* address? Do we then use context of destination to sort out which
|
|
* one is best? And what about NAT's sending P->G may get you a NAT
|
|
* translation, or should you select the G thats on the interface in
|
|
* preference.
|
|
*
|
|
* Decisions:
|
|
*
|
|
* - count the number of addresses on the interface.
|
|
* - if it is one, no problem except case <c>.
|
|
* For <a> we will assume a NAT out there.
|
|
* - if there are more than one, then we need to worry about scope P
|
|
* or G. We should prefer G -> G and P -> P if possible.
|
|
* Then as a secondary fall back to mixed types G->P being a last
|
|
* ditch one.
|
|
* - The above all works for bound all, but bound specific we need to
|
|
* use the same concept but instead only consider the bound
|
|
* addresses. If the bound set is NOT assigned to the interface then
|
|
* we must use rotation amongst the bound addresses..
|
|
*/
|
|
if (ro->ro_rt == NULL) {
|
|
/*
|
|
* Need a route to cache.
|
|
*/
|
|
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
|
|
}
|
|
if (ro->ro_rt == NULL) {
|
|
return (NULL);
|
|
}
|
|
fam = ro->ro_dst.sa_family;
|
|
dest_is_priv = dest_is_loop = 0;
|
|
/* Setup our scopes for the destination */
|
|
switch (fam) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
/* Scope based on outbound address */
|
|
if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
|
|
dest_is_loop = 1;
|
|
if (net != NULL) {
|
|
/* mark it as local */
|
|
net->addr_is_local = 1;
|
|
}
|
|
} else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
|
|
dest_is_priv = 1;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
/* Scope based on outbound address */
|
|
if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
|
|
SCTP_ROUTE_IS_REAL_LOOP(ro)) {
|
|
/*
|
|
* If the address is a loopback address, which
|
|
* consists of "::1" OR "fe80::1%lo0", we are
|
|
* loopback scope. But we don't use dest_is_priv
|
|
* (link local addresses).
|
|
*/
|
|
dest_is_loop = 1;
|
|
if (net != NULL) {
|
|
/* mark it as local */
|
|
net->addr_is_local = 1;
|
|
}
|
|
} else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
|
|
dest_is_priv = 1;
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
|
|
SCTP_IPI_ADDR_RLOCK();
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
/*
|
|
* Bound all case
|
|
*/
|
|
answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
|
|
dest_is_priv, dest_is_loop,
|
|
non_asoc_addr_ok, fam);
|
|
SCTP_IPI_ADDR_RUNLOCK();
|
|
return (answer);
|
|
}
|
|
/*
|
|
* Subset bound case
|
|
*/
|
|
if (stcb) {
|
|
answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
|
|
vrf_id, dest_is_priv,
|
|
dest_is_loop,
|
|
non_asoc_addr_ok, fam);
|
|
} else {
|
|
answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
|
|
non_asoc_addr_ok,
|
|
dest_is_priv,
|
|
dest_is_loop, fam);
|
|
}
|
|
SCTP_IPI_ADDR_RUNLOCK();
|
|
return (answer);
|
|
}
|
|
|
|
static int
|
|
sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
|
|
{
|
|
struct cmsghdr cmh;
|
|
int tlen, at, found;
|
|
struct sctp_sndinfo sndinfo;
|
|
struct sctp_prinfo prinfo;
|
|
struct sctp_authinfo authinfo;
|
|
|
|
tlen = SCTP_BUF_LEN(control);
|
|
at = 0;
|
|
found = 0;
|
|
/*
|
|
* Independent of how many mbufs, find the c_type inside the control
|
|
* structure and copy out the data.
|
|
*/
|
|
while (at < tlen) {
|
|
if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
|
|
/* There is not enough room for one more. */
|
|
return (found);
|
|
}
|
|
m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
|
|
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
|
|
/* We dont't have a complete CMSG header. */
|
|
return (found);
|
|
}
|
|
if (((int)cmh.cmsg_len + at) > tlen) {
|
|
/* We don't have the complete CMSG. */
|
|
return (found);
|
|
}
|
|
if ((cmh.cmsg_level == IPPROTO_SCTP) &&
|
|
((c_type == cmh.cmsg_type) ||
|
|
((c_type == SCTP_SNDRCV) &&
|
|
((cmh.cmsg_type == SCTP_SNDINFO) ||
|
|
(cmh.cmsg_type == SCTP_PRINFO) ||
|
|
(cmh.cmsg_type == SCTP_AUTHINFO))))) {
|
|
if (c_type == cmh.cmsg_type) {
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
|
|
return (found);
|
|
}
|
|
/* It is exactly what we want. Copy it out. */
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), (int)cpsize, (caddr_t)data);
|
|
return (1);
|
|
} else {
|
|
struct sctp_sndrcvinfo *sndrcvinfo;
|
|
|
|
sndrcvinfo = (struct sctp_sndrcvinfo *)data;
|
|
if (found == 0) {
|
|
if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
|
|
return (found);
|
|
}
|
|
memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
|
|
}
|
|
switch (cmh.cmsg_type) {
|
|
case SCTP_SNDINFO:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
|
|
return (found);
|
|
}
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
|
|
sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
|
|
sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
|
|
sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
|
|
sndrcvinfo->sinfo_context = sndinfo.snd_context;
|
|
sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
|
|
break;
|
|
case SCTP_PRINFO:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
|
|
return (found);
|
|
}
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
|
|
if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
|
|
sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
|
|
} else {
|
|
sndrcvinfo->sinfo_timetolive = 0;
|
|
}
|
|
sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
|
|
break;
|
|
case SCTP_AUTHINFO:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
|
|
return (found);
|
|
}
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
|
|
sndrcvinfo->sinfo_keynumber_valid = 1;
|
|
sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
|
|
break;
|
|
default:
|
|
return (found);
|
|
}
|
|
found = 1;
|
|
}
|
|
}
|
|
at += CMSG_ALIGN(cmh.cmsg_len);
|
|
}
|
|
return (found);
|
|
}
|
|
|
|
static int
|
|
sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
|
|
{
|
|
struct cmsghdr cmh;
|
|
int tlen, at;
|
|
struct sctp_initmsg initmsg;
|
|
#ifdef INET
|
|
struct sockaddr_in sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 sin6;
|
|
#endif
|
|
|
|
tlen = SCTP_BUF_LEN(control);
|
|
at = 0;
|
|
while (at < tlen) {
|
|
if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
|
|
/* There is not enough room for one more. */
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
|
|
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
|
|
/* We dont't have a complete CMSG header. */
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
if (((int)cmh.cmsg_len + at) > tlen) {
|
|
/* We don't have the complete CMSG. */
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
if (cmh.cmsg_level == IPPROTO_SCTP) {
|
|
switch (cmh.cmsg_type) {
|
|
case SCTP_INIT:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
|
|
if (initmsg.sinit_max_attempts)
|
|
stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
|
|
if (initmsg.sinit_num_ostreams)
|
|
stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
|
|
if (initmsg.sinit_max_instreams)
|
|
stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
|
|
if (initmsg.sinit_max_init_timeo)
|
|
stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
|
|
if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
|
|
struct sctp_stream_out *tmp_str;
|
|
unsigned int i;
|
|
#if defined(SCTP_DETAILED_STR_STATS)
|
|
int j;
|
|
#endif
|
|
|
|
/* Default is NOT correct */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
|
|
stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_MALLOC(tmp_str,
|
|
struct sctp_stream_out *,
|
|
(stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
|
|
SCTP_M_STRMO);
|
|
SCTP_TCB_LOCK(stcb);
|
|
if (tmp_str != NULL) {
|
|
SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
|
|
stcb->asoc.strmout = tmp_str;
|
|
stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
|
|
} else {
|
|
stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
|
|
}
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
|
|
stcb->asoc.strmout[i].chunks_on_queues = 0;
|
|
stcb->asoc.strmout[i].next_mid_ordered = 0;
|
|
stcb->asoc.strmout[i].next_mid_unordered = 0;
|
|
#if defined(SCTP_DETAILED_STR_STATS)
|
|
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
|
|
stcb->asoc.strmout[i].abandoned_sent[j] = 0;
|
|
stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
|
|
}
|
|
#else
|
|
stcb->asoc.strmout[i].abandoned_sent[0] = 0;
|
|
stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
|
|
#endif
|
|
stcb->asoc.strmout[i].sid = i;
|
|
stcb->asoc.strmout[i].last_msg_incomplete = 0;
|
|
stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
|
|
stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
|
|
}
|
|
}
|
|
break;
|
|
#ifdef INET
|
|
case SCTP_DSTADDRV4:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
memset(&sin, 0, sizeof(struct sockaddr_in));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(struct sockaddr_in);
|
|
sin.sin_port = stcb->rport;
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
|
|
if ((sin.sin_addr.s_addr == INADDR_ANY) ||
|
|
(sin.sin_addr.s_addr == INADDR_BROADCAST) ||
|
|
IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
|
|
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
|
|
*error = ENOBUFS;
|
|
return (1);
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SCTP_DSTADDRV6:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
memset(&sin6, 0, sizeof(struct sockaddr_in6));
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6.sin6_port = stcb->rport;
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
|
|
IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
#ifdef INET
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
|
|
in6_sin6_2_sin(&sin, &sin6);
|
|
if ((sin.sin_addr.s_addr == INADDR_ANY) ||
|
|
(sin.sin_addr.s_addr == INADDR_BROADCAST) ||
|
|
IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
|
|
*error = EINVAL;
|
|
return (1);
|
|
}
|
|
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
|
|
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
|
|
*error = ENOBUFS;
|
|
return (1);
|
|
}
|
|
} else
|
|
#endif
|
|
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
|
|
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
|
|
*error = ENOBUFS;
|
|
return (1);
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
at += CMSG_ALIGN(cmh.cmsg_len);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct sctp_tcb *
|
|
sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
|
|
uint16_t port,
|
|
struct mbuf *control,
|
|
struct sctp_nets **net_p,
|
|
int *error)
|
|
{
|
|
struct cmsghdr cmh;
|
|
int tlen, at;
|
|
struct sctp_tcb *stcb;
|
|
struct sockaddr *addr;
|
|
#ifdef INET
|
|
struct sockaddr_in sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 sin6;
|
|
#endif
|
|
|
|
tlen = SCTP_BUF_LEN(control);
|
|
at = 0;
|
|
while (at < tlen) {
|
|
if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
|
|
/* There is not enough room for one more. */
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
|
|
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
|
|
/* We dont't have a complete CMSG header. */
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
if (((int)cmh.cmsg_len + at) > tlen) {
|
|
/* We don't have the complete CMSG. */
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
if (cmh.cmsg_level == IPPROTO_SCTP) {
|
|
switch (cmh.cmsg_type) {
|
|
#ifdef INET
|
|
case SCTP_DSTADDRV4:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
memset(&sin, 0, sizeof(struct sockaddr_in));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(struct sockaddr_in);
|
|
sin.sin_port = port;
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
|
|
addr = (struct sockaddr *)&sin;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SCTP_DSTADDRV6:
|
|
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
memset(&sin6, 0, sizeof(struct sockaddr_in6));
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6.sin6_port = port;
|
|
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
|
|
#ifdef INET
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
|
|
in6_sin6_2_sin(&sin, &sin6);
|
|
addr = (struct sockaddr *)&sin;
|
|
} else
|
|
#endif
|
|
addr = (struct sockaddr *)&sin6;
|
|
break;
|
|
#endif
|
|
default:
|
|
addr = NULL;
|
|
break;
|
|
}
|
|
if (addr) {
|
|
stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
|
|
if (stcb != NULL) {
|
|
return (stcb);
|
|
}
|
|
}
|
|
}
|
|
at += CMSG_ALIGN(cmh.cmsg_len);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static struct mbuf *
|
|
sctp_add_cookie(struct mbuf *init, int init_offset,
|
|
struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
|
|
{
|
|
struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
|
|
struct sctp_state_cookie *stc;
|
|
struct sctp_paramhdr *ph;
|
|
uint8_t *foo;
|
|
int sig_offset;
|
|
uint16_t cookie_sz;
|
|
|
|
mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
|
|
sizeof(struct sctp_paramhdr)), 0,
|
|
M_NOWAIT, 1, MT_DATA);
|
|
if (mret == NULL) {
|
|
return (NULL);
|
|
}
|
|
copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
|
|
if (copy_init == NULL) {
|
|
sctp_m_freem(mret);
|
|
return (NULL);
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
|
|
M_NOWAIT);
|
|
if (copy_initack == NULL) {
|
|
sctp_m_freem(mret);
|
|
sctp_m_freem(copy_init);
|
|
return (NULL);
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
/* easy side we just drop it on the end */
|
|
ph = mtod(mret, struct sctp_paramhdr *);
|
|
SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
|
|
sizeof(struct sctp_paramhdr);
|
|
stc = (struct sctp_state_cookie *)((caddr_t)ph +
|
|
sizeof(struct sctp_paramhdr));
|
|
ph->param_type = htons(SCTP_STATE_COOKIE);
|
|
ph->param_length = 0; /* fill in at the end */
|
|
/* Fill in the stc cookie data */
|
|
memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
|
|
|
|
/* tack the INIT and then the INIT-ACK onto the chain */
|
|
cookie_sz = 0;
|
|
for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
|
|
cookie_sz += SCTP_BUF_LEN(m_at);
|
|
if (SCTP_BUF_NEXT(m_at) == NULL) {
|
|
SCTP_BUF_NEXT(m_at) = copy_init;
|
|
break;
|
|
}
|
|
}
|
|
for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
|
|
cookie_sz += SCTP_BUF_LEN(m_at);
|
|
if (SCTP_BUF_NEXT(m_at) == NULL) {
|
|
SCTP_BUF_NEXT(m_at) = copy_initack;
|
|
break;
|
|
}
|
|
}
|
|
for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
|
|
cookie_sz += SCTP_BUF_LEN(m_at);
|
|
if (SCTP_BUF_NEXT(m_at) == NULL) {
|
|
break;
|
|
}
|
|
}
|
|
sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (sig == NULL) {
|
|
/* no space, so free the entire chain */
|
|
sctp_m_freem(mret);
|
|
return (NULL);
|
|
}
|
|
SCTP_BUF_LEN(sig) = 0;
|
|
SCTP_BUF_NEXT(m_at) = sig;
|
|
sig_offset = 0;
|
|
foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
|
|
memset(foo, 0, SCTP_SIGNATURE_SIZE);
|
|
*signature = foo;
|
|
SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
|
|
cookie_sz += SCTP_SIGNATURE_SIZE;
|
|
ph->param_length = htons(cookie_sz);
|
|
return (mret);
|
|
}
|
|
|
|
|
|
static uint8_t
|
|
sctp_get_ect(struct sctp_tcb *stcb)
|
|
{
|
|
if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
|
|
return (SCTP_ECT0_BIT);
|
|
} else {
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
static void
|
|
sctp_handle_no_route(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
int so_locked)
|
|
{
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
|
|
|
|
if (net) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
|
|
if (net->dest_state & SCTP_ADDR_CONFIRMED) {
|
|
if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
|
|
stcb, 0,
|
|
(void *)net,
|
|
so_locked);
|
|
net->dest_state &= ~SCTP_ADDR_REACHABLE;
|
|
net->dest_state &= ~SCTP_ADDR_PF;
|
|
}
|
|
}
|
|
if (stcb) {
|
|
if (net == stcb->asoc.primary_destination) {
|
|
/* need a new primary */
|
|
struct sctp_nets *alt;
|
|
|
|
alt = sctp_find_alternate_net(stcb, net, 0);
|
|
if (alt != net) {
|
|
if (stcb->asoc.alternate) {
|
|
sctp_free_remote_addr(stcb->asoc.alternate);
|
|
}
|
|
stcb->asoc.alternate = alt;
|
|
atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
|
|
if (net->ro._s_addr) {
|
|
sctp_free_ifa(net->ro._s_addr);
|
|
net->ro._s_addr = NULL;
|
|
}
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb, /* may be NULL */
|
|
struct sctp_nets *net,
|
|
struct sockaddr *to,
|
|
struct mbuf *m,
|
|
uint32_t auth_offset,
|
|
struct sctp_auth_chunk *auth,
|
|
uint16_t auth_keyid,
|
|
int nofragment_flag,
|
|
int ecn_ok,
|
|
int out_of_asoc_ok,
|
|
uint16_t src_port,
|
|
uint16_t dest_port,
|
|
uint32_t v_tag,
|
|
uint16_t port,
|
|
union sctp_sockstore *over_addr,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
int so_locked SCTP_UNUSED
|
|
#else
|
|
int so_locked
|
|
#endif
|
|
)
|
|
/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
|
|
{
|
|
/**
|
|
* Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
|
|
* WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
|
|
* - fill in the HMAC digest of any AUTH chunk in the packet.
|
|
* - calculate and fill in the SCTP checksum.
|
|
* - prepend an IP address header.
|
|
* - if boundall use INADDR_ANY.
|
|
* - if boundspecific do source address selection.
|
|
* - set fragmentation option for ipV4.
|
|
* - On return from IP output, check/adjust mtu size of output
|
|
* interface and smallest_mtu size as well.
|
|
*/
|
|
/* Will need ifdefs around this */
|
|
struct mbuf *newm;
|
|
struct sctphdr *sctphdr;
|
|
int packet_length;
|
|
int ret;
|
|
#if defined(INET) || defined(INET6)
|
|
uint32_t vrf_id;
|
|
#endif
|
|
#if defined(INET) || defined(INET6)
|
|
struct mbuf *o_pak;
|
|
sctp_route_t *ro = NULL;
|
|
struct udphdr *udp = NULL;
|
|
#endif
|
|
uint8_t tos_value;
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so = NULL;
|
|
#endif
|
|
|
|
if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
|
|
sctp_m_freem(m);
|
|
return (EFAULT);
|
|
}
|
|
#if defined(INET) || defined(INET6)
|
|
if (stcb) {
|
|
vrf_id = stcb->asoc.vrf_id;
|
|
} else {
|
|
vrf_id = inp->def_vrf_id;
|
|
}
|
|
#endif
|
|
/* fill in the HMAC digest for any AUTH chunk in the packet */
|
|
if ((auth != NULL) && (stcb != NULL)) {
|
|
sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
|
|
}
|
|
if (net) {
|
|
tos_value = net->dscp;
|
|
} else if (stcb) {
|
|
tos_value = stcb->asoc.default_dscp;
|
|
} else {
|
|
tos_value = inp->sctp_ep.default_dscp;
|
|
}
|
|
|
|
switch (to->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
{
|
|
struct ip *ip = NULL;
|
|
sctp_route_t iproute;
|
|
int len;
|
|
|
|
len = SCTP_MIN_V4_OVERHEAD;
|
|
if (port) {
|
|
len += sizeof(struct udphdr);
|
|
}
|
|
newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
|
|
if (newm == NULL) {
|
|
sctp_m_freem(m);
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_ALIGN_TO_END(newm, len);
|
|
SCTP_BUF_LEN(newm) = len;
|
|
SCTP_BUF_NEXT(newm) = m;
|
|
m = newm;
|
|
if (net != NULL) {
|
|
m->m_pkthdr.flowid = net->flowid;
|
|
M_HASHTYPE_SET(m, net->flowtype);
|
|
} else {
|
|
m->m_pkthdr.flowid = mflowid;
|
|
M_HASHTYPE_SET(m, mflowtype);
|
|
}
|
|
packet_length = sctp_calculate_len(m);
|
|
ip = mtod(m, struct ip *);
|
|
ip->ip_v = IPVERSION;
|
|
ip->ip_hl = (sizeof(struct ip) >> 2);
|
|
if (tos_value == 0) {
|
|
/*
|
|
* This means especially, that it is not set
|
|
* at the SCTP layer. So use the value from
|
|
* the IP layer.
|
|
*/
|
|
tos_value = inp->ip_inp.inp.inp_ip_tos;
|
|
}
|
|
tos_value &= 0xfc;
|
|
if (ecn_ok) {
|
|
tos_value |= sctp_get_ect(stcb);
|
|
}
|
|
if ((nofragment_flag) && (port == 0)) {
|
|
ip->ip_off = htons(IP_DF);
|
|
} else {
|
|
ip->ip_off = htons(0);
|
|
}
|
|
/* FreeBSD has a function for ip_id's */
|
|
ip_fillid(ip);
|
|
|
|
ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
|
|
ip->ip_len = htons(packet_length);
|
|
ip->ip_tos = tos_value;
|
|
if (port) {
|
|
ip->ip_p = IPPROTO_UDP;
|
|
} else {
|
|
ip->ip_p = IPPROTO_SCTP;
|
|
}
|
|
ip->ip_sum = 0;
|
|
if (net == NULL) {
|
|
ro = &iproute;
|
|
memset(&iproute, 0, sizeof(iproute));
|
|
memcpy(&ro->ro_dst, to, to->sa_len);
|
|
} else {
|
|
ro = (sctp_route_t *) & net->ro;
|
|
}
|
|
/* Now the address selection part */
|
|
ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
|
|
|
|
/* call the routine to select the src address */
|
|
if (net && out_of_asoc_ok == 0) {
|
|
if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
|
|
sctp_free_ifa(net->ro._s_addr);
|
|
net->ro._s_addr = NULL;
|
|
net->src_addr_selected = 0;
|
|
if (ro->ro_rt) {
|
|
RTFREE(ro->ro_rt);
|
|
ro->ro_rt = NULL;
|
|
}
|
|
}
|
|
if (net->src_addr_selected == 0) {
|
|
/* Cache the source address */
|
|
net->ro._s_addr = sctp_source_address_selection(inp, stcb,
|
|
ro, net, 0,
|
|
vrf_id);
|
|
net->src_addr_selected = 1;
|
|
}
|
|
if (net->ro._s_addr == NULL) {
|
|
/* No route to host */
|
|
net->src_addr_selected = 0;
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
|
|
} else {
|
|
if (over_addr == NULL) {
|
|
struct sctp_ifa *_lsrc;
|
|
|
|
_lsrc = sctp_source_address_selection(inp, stcb, ro,
|
|
net,
|
|
out_of_asoc_ok,
|
|
vrf_id);
|
|
if (_lsrc == NULL) {
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
ip->ip_src = _lsrc->address.sin.sin_addr;
|
|
sctp_free_ifa(_lsrc);
|
|
} else {
|
|
ip->ip_src = over_addr->sin.sin_addr;
|
|
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
|
|
}
|
|
}
|
|
if (port) {
|
|
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
|
|
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
|
|
udp->uh_dport = port;
|
|
udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip)));
|
|
if (V_udp_cksum) {
|
|
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
|
|
} else {
|
|
udp->uh_sum = 0;
|
|
}
|
|
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
|
|
} else {
|
|
sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
|
|
}
|
|
|
|
sctphdr->src_port = src_port;
|
|
sctphdr->dest_port = dest_port;
|
|
sctphdr->v_tag = v_tag;
|
|
sctphdr->checksum = 0;
|
|
|
|
/*
|
|
* If source address selection fails and we find no
|
|
* route then the ip_output should fail as well with
|
|
* a NO_ROUTE_TO_HOST type error. We probably should
|
|
* catch that somewhere and abort the association
|
|
* right away (assuming this is an INIT being sent).
|
|
*/
|
|
if (ro->ro_rt == NULL) {
|
|
/*
|
|
* src addr selection failed to find a route
|
|
* (or valid source addr), so we can't get
|
|
* there from here (yet)!
|
|
*/
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
if (ro != &iproute) {
|
|
memcpy(&iproute, ro, sizeof(*ro));
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
|
|
(uint32_t) (ntohl(ip->ip_src.s_addr)));
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
|
|
(uint32_t) (ntohl(ip->ip_dst.s_addr)));
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
|
|
(void *)ro->ro_rt);
|
|
|
|
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
|
|
/* failed to prepend data, give up */
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
sctp_m_freem(m);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
|
|
if (port) {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
|
|
SCTP_STAT_INCR(sctps_sendswcrc);
|
|
#endif
|
|
if (V_udp_cksum) {
|
|
SCTP_ENABLE_UDP_CSUM(o_pak);
|
|
}
|
|
} else {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
m->m_pkthdr.csum_flags = CSUM_SCTP;
|
|
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
|
|
SCTP_STAT_INCR(sctps_sendhwcrc);
|
|
#endif
|
|
}
|
|
#ifdef SCTP_PACKET_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
|
|
sctp_packet_log(o_pak);
|
|
#endif
|
|
/* send it out. table id is taken from stcb */
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
|
|
so = SCTP_INP_SO(inp);
|
|
SCTP_SOCKET_UNLOCK(so, 0);
|
|
}
|
|
#endif
|
|
SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 0);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
}
|
|
#endif
|
|
SCTP_STAT_INCR(sctps_sendpackets);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
|
|
if (ret)
|
|
SCTP_STAT_INCR(sctps_senderrors);
|
|
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
|
|
if (net == NULL) {
|
|
/* free tempy routes */
|
|
RO_RTFREE(ro);
|
|
} else {
|
|
/* PMTU check versus smallest asoc MTU goes
|
|
* here */
|
|
if ((ro->ro_rt != NULL) &&
|
|
(net->ro._s_addr)) {
|
|
uint32_t mtu;
|
|
|
|
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
|
|
if (net->port) {
|
|
mtu -= sizeof(struct udphdr);
|
|
}
|
|
if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
|
|
sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
|
|
net->mtu = mtu;
|
|
}
|
|
} else if (ro->ro_rt == NULL) {
|
|
/* route was freed */
|
|
if (net->ro._s_addr &&
|
|
net->src_addr_selected) {
|
|
sctp_free_ifa(net->ro._s_addr);
|
|
net->ro._s_addr = NULL;
|
|
}
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
{
|
|
uint32_t flowlabel, flowinfo;
|
|
struct ip6_hdr *ip6h;
|
|
struct route_in6 ip6route;
|
|
struct ifnet *ifp;
|
|
struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
|
|
int prev_scope = 0;
|
|
struct sockaddr_in6 lsa6_storage;
|
|
int error;
|
|
u_short prev_port = 0;
|
|
int len;
|
|
|
|
if (net) {
|
|
flowlabel = net->flowlabel;
|
|
} else if (stcb) {
|
|
flowlabel = stcb->asoc.default_flowlabel;
|
|
} else {
|
|
flowlabel = inp->sctp_ep.default_flowlabel;
|
|
}
|
|
if (flowlabel == 0) {
|
|
/*
|
|
* This means especially, that it is not set
|
|
* at the SCTP layer. So use the value from
|
|
* the IP layer.
|
|
*/
|
|
flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
|
|
}
|
|
flowlabel &= 0x000fffff;
|
|
len = SCTP_MIN_OVERHEAD;
|
|
if (port) {
|
|
len += sizeof(struct udphdr);
|
|
}
|
|
newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
|
|
if (newm == NULL) {
|
|
sctp_m_freem(m);
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_ALIGN_TO_END(newm, len);
|
|
SCTP_BUF_LEN(newm) = len;
|
|
SCTP_BUF_NEXT(newm) = m;
|
|
m = newm;
|
|
if (net != NULL) {
|
|
m->m_pkthdr.flowid = net->flowid;
|
|
M_HASHTYPE_SET(m, net->flowtype);
|
|
} else {
|
|
m->m_pkthdr.flowid = mflowid;
|
|
M_HASHTYPE_SET(m, mflowtype);
|
|
}
|
|
packet_length = sctp_calculate_len(m);
|
|
|
|
ip6h = mtod(m, struct ip6_hdr *);
|
|
/* protect *sin6 from overwrite */
|
|
sin6 = (struct sockaddr_in6 *)to;
|
|
tmp = *sin6;
|
|
sin6 = &tmp;
|
|
|
|
/* KAME hack: embed scopeid */
|
|
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
if (net == NULL) {
|
|
memset(&ip6route, 0, sizeof(ip6route));
|
|
ro = (sctp_route_t *) & ip6route;
|
|
memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
|
|
} else {
|
|
ro = (sctp_route_t *) & net->ro;
|
|
}
|
|
/*
|
|
* We assume here that inp_flow is in host byte
|
|
* order within the TCB!
|
|
*/
|
|
if (tos_value == 0) {
|
|
/*
|
|
* This means especially, that it is not set
|
|
* at the SCTP layer. So use the value from
|
|
* the IP layer.
|
|
*/
|
|
tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
|
|
}
|
|
tos_value &= 0xfc;
|
|
if (ecn_ok) {
|
|
tos_value |= sctp_get_ect(stcb);
|
|
}
|
|
flowinfo = 0x06;
|
|
flowinfo <<= 8;
|
|
flowinfo |= tos_value;
|
|
flowinfo <<= 20;
|
|
flowinfo |= flowlabel;
|
|
ip6h->ip6_flow = htonl(flowinfo);
|
|
if (port) {
|
|
ip6h->ip6_nxt = IPPROTO_UDP;
|
|
} else {
|
|
ip6h->ip6_nxt = IPPROTO_SCTP;
|
|
}
|
|
ip6h->ip6_plen = (uint16_t) (packet_length - sizeof(struct ip6_hdr));
|
|
ip6h->ip6_dst = sin6->sin6_addr;
|
|
|
|
/*
|
|
* Add SRC address selection here: we can only reuse
|
|
* to a limited degree the kame src-addr-sel, since
|
|
* we can try their selection but it may not be
|
|
* bound.
|
|
*/
|
|
bzero(&lsa6_tmp, sizeof(lsa6_tmp));
|
|
lsa6_tmp.sin6_family = AF_INET6;
|
|
lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
|
|
lsa6 = &lsa6_tmp;
|
|
if (net && out_of_asoc_ok == 0) {
|
|
if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
|
|
sctp_free_ifa(net->ro._s_addr);
|
|
net->ro._s_addr = NULL;
|
|
net->src_addr_selected = 0;
|
|
if (ro->ro_rt) {
|
|
RTFREE(ro->ro_rt);
|
|
ro->ro_rt = NULL;
|
|
}
|
|
}
|
|
if (net->src_addr_selected == 0) {
|
|
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
|
/* KAME hack: embed scopeid */
|
|
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
/* Cache the source address */
|
|
net->ro._s_addr = sctp_source_address_selection(inp,
|
|
stcb,
|
|
ro,
|
|
net,
|
|
0,
|
|
vrf_id);
|
|
(void)sa6_recoverscope(sin6);
|
|
net->src_addr_selected = 1;
|
|
}
|
|
if (net->ro._s_addr == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
|
|
net->src_addr_selected = 0;
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
|
|
} else {
|
|
sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
|
|
/* KAME hack: embed scopeid */
|
|
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
if (over_addr == NULL) {
|
|
struct sctp_ifa *_lsrc;
|
|
|
|
_lsrc = sctp_source_address_selection(inp, stcb, ro,
|
|
net,
|
|
out_of_asoc_ok,
|
|
vrf_id);
|
|
if (_lsrc == NULL) {
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
|
|
sctp_free_ifa(_lsrc);
|
|
} else {
|
|
lsa6->sin6_addr = over_addr->sin6.sin6_addr;
|
|
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
|
|
}
|
|
(void)sa6_recoverscope(sin6);
|
|
}
|
|
lsa6->sin6_port = inp->sctp_lport;
|
|
|
|
if (ro->ro_rt == NULL) {
|
|
/*
|
|
* src addr selection failed to find a route
|
|
* (or valid source addr), so we can't get
|
|
* there from here!
|
|
*/
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
/*
|
|
* XXX: sa6 may not have a valid sin6_scope_id in
|
|
* the non-SCOPEDROUTING case.
|
|
*/
|
|
bzero(&lsa6_storage, sizeof(lsa6_storage));
|
|
lsa6_storage.sin6_family = AF_INET6;
|
|
lsa6_storage.sin6_len = sizeof(lsa6_storage);
|
|
lsa6_storage.sin6_addr = lsa6->sin6_addr;
|
|
if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
|
|
sctp_m_freem(m);
|
|
return (error);
|
|
}
|
|
/* XXX */
|
|
lsa6_storage.sin6_addr = lsa6->sin6_addr;
|
|
lsa6_storage.sin6_port = inp->sctp_lport;
|
|
lsa6 = &lsa6_storage;
|
|
ip6h->ip6_src = lsa6->sin6_addr;
|
|
|
|
if (port) {
|
|
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
|
|
sctp_handle_no_route(stcb, net, so_locked);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
|
|
sctp_m_freem(m);
|
|
return (EHOSTUNREACH);
|
|
}
|
|
udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
|
|
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
|
|
udp->uh_dport = port;
|
|
udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip6_hdr)));
|
|
udp->uh_sum = 0;
|
|
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
|
|
} else {
|
|
sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
|
|
}
|
|
|
|
sctphdr->src_port = src_port;
|
|
sctphdr->dest_port = dest_port;
|
|
sctphdr->v_tag = v_tag;
|
|
sctphdr->checksum = 0;
|
|
|
|
/*
|
|
* We set the hop limit now since there is a good
|
|
* chance that our ro pointer is now filled
|
|
*/
|
|
ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
|
|
ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
|
|
|
|
#ifdef SCTP_DEBUG
|
|
/* Copy to be sure something bad is not happening */
|
|
sin6->sin6_addr = ip6h->ip6_dst;
|
|
lsa6->sin6_addr = ip6h->ip6_src;
|
|
#endif
|
|
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
|
|
if (net) {
|
|
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
|
/* preserve the port and scope for link
|
|
* local send */
|
|
prev_scope = sin6->sin6_scope_id;
|
|
prev_port = sin6->sin6_port;
|
|
}
|
|
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
|
|
/* failed to prepend data, give up */
|
|
sctp_m_freem(m);
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
|
|
if (port) {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
|
|
SCTP_STAT_INCR(sctps_sendswcrc);
|
|
#endif
|
|
if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
|
|
udp->uh_sum = 0xffff;
|
|
}
|
|
} else {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
|
|
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
|
|
SCTP_STAT_INCR(sctps_sendhwcrc);
|
|
#endif
|
|
}
|
|
/* send it out. table id is taken from stcb */
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
|
|
so = SCTP_INP_SO(inp);
|
|
SCTP_SOCKET_UNLOCK(so, 0);
|
|
}
|
|
#endif
|
|
#ifdef SCTP_PACKET_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
|
|
sctp_packet_log(o_pak);
|
|
#endif
|
|
SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 0);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
}
|
|
#endif
|
|
if (net) {
|
|
/* for link local this must be done */
|
|
sin6->sin6_scope_id = prev_scope;
|
|
sin6->sin6_port = prev_port;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
|
|
SCTP_STAT_INCR(sctps_sendpackets);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
|
|
if (ret) {
|
|
SCTP_STAT_INCR(sctps_senderrors);
|
|
}
|
|
if (net == NULL) {
|
|
/* Now if we had a temp route free it */
|
|
RO_RTFREE(ro);
|
|
} else {
|
|
/* PMTU check versus smallest asoc MTU goes
|
|
* here */
|
|
if (ro->ro_rt == NULL) {
|
|
/* Route was freed */
|
|
if (net->ro._s_addr &&
|
|
net->src_addr_selected) {
|
|
sctp_free_ifa(net->ro._s_addr);
|
|
net->ro._s_addr = NULL;
|
|
}
|
|
net->src_addr_selected = 0;
|
|
}
|
|
if ((ro->ro_rt != NULL) &&
|
|
(net->ro._s_addr)) {
|
|
uint32_t mtu;
|
|
|
|
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
|
|
if (mtu &&
|
|
(stcb->asoc.smallest_mtu > mtu)) {
|
|
sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
|
|
net->mtu = mtu;
|
|
if (net->port) {
|
|
net->mtu -= sizeof(struct udphdr);
|
|
}
|
|
}
|
|
} else if (ifp) {
|
|
if (ND_IFINFO(ifp)->linkmtu &&
|
|
(stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
|
|
sctp_mtu_size_reset(inp,
|
|
&stcb->asoc,
|
|
ND_IFINFO(ifp)->linkmtu);
|
|
}
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
#endif
|
|
default:
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
|
|
((struct sockaddr *)to)->sa_family);
|
|
sctp_m_freem(m);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
|
|
return (EFAULT);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
struct mbuf *m, *m_last;
|
|
struct sctp_nets *net;
|
|
struct sctp_init_chunk *init;
|
|
struct sctp_supported_addr_param *sup_addr;
|
|
struct sctp_adaptation_layer_indication *ali;
|
|
struct sctp_supported_chunk_types_param *pr_supported;
|
|
struct sctp_paramhdr *ph;
|
|
int cnt_inits_to = 0;
|
|
int ret;
|
|
uint16_t num_ext, chunk_len, padding_len, parameter_len;
|
|
|
|
/* INIT's always go to the primary (and usually ONLY address) */
|
|
net = stcb->asoc.primary_destination;
|
|
if (net == NULL) {
|
|
net = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if (net == NULL) {
|
|
/* TSNH */
|
|
return;
|
|
}
|
|
/* we confirm any address we send an INIT to */
|
|
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
|
|
(void)sctp_set_primary_addr(stcb, NULL, net);
|
|
} else {
|
|
/* we confirm any address we send an INIT to */
|
|
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
|
|
#ifdef INET6
|
|
if (net->ro._l_addr.sa.sa_family == AF_INET6) {
|
|
/*
|
|
* special hook, if we are sending to link local it will not
|
|
* show up in our private address count.
|
|
*/
|
|
if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
|
|
cnt_inits_to = 1;
|
|
}
|
|
#endif
|
|
if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
|
|
/* This case should not happen */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
|
|
return;
|
|
}
|
|
/* start the INIT timer */
|
|
sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
|
|
|
|
m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
|
|
if (m == NULL) {
|
|
/* No memory, INIT timer will re-attempt. */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
|
|
return;
|
|
}
|
|
chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
|
|
padding_len = 0;
|
|
/* Now lets put the chunk header in place */
|
|
init = mtod(m, struct sctp_init_chunk *);
|
|
/* now the chunk header */
|
|
init->ch.chunk_type = SCTP_INITIATION;
|
|
init->ch.chunk_flags = 0;
|
|
/* fill in later from mbuf we build */
|
|
init->ch.chunk_length = 0;
|
|
/* place in my tag */
|
|
init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
|
|
/* set up some of the credits. */
|
|
init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
|
|
SCTP_MINIMAL_RWND));
|
|
init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
|
|
init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
|
|
init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
|
|
|
|
/* Adaptation layer indication parameter */
|
|
if (inp->sctp_ep.adaptation_layer_indicator_provided) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
|
|
ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
|
|
ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
|
|
ali->ph.param_length = htons(parameter_len);
|
|
ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* ECN parameter */
|
|
if (stcb->asoc.ecn_supported == 1) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
|
|
ph->param_type = htons(SCTP_ECN_CAPABLE);
|
|
ph->param_length = htons(parameter_len);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* PR-SCTP supported parameter */
|
|
if (stcb->asoc.prsctp_supported == 1) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
|
|
ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
|
|
ph->param_length = htons(parameter_len);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* Add NAT friendly parameter. */
|
|
if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
|
|
ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
|
|
ph->param_length = htons(parameter_len);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* And now tell the peer which extensions we support */
|
|
num_ext = 0;
|
|
pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
|
|
if (stcb->asoc.prsctp_supported == 1) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
|
|
if (stcb->asoc.idata_supported) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
|
|
}
|
|
}
|
|
if (stcb->asoc.auth_supported == 1) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
|
|
}
|
|
if (stcb->asoc.asconf_supported == 1) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
|
|
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
|
|
}
|
|
if (stcb->asoc.reconfig_supported == 1) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
|
|
}
|
|
if (stcb->asoc.idata_supported) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
|
|
}
|
|
if (stcb->asoc.nrsack_supported == 1) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
|
|
}
|
|
if (stcb->asoc.pktdrop_supported == 1) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
|
|
}
|
|
if (num_ext > 0) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
|
|
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
|
|
pr_supported->ph.param_length = htons(parameter_len);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* add authentication parameters */
|
|
if (stcb->asoc.auth_supported) {
|
|
/* attach RANDOM parameter, if available */
|
|
if (stcb->asoc.authinfo.random != NULL) {
|
|
struct sctp_auth_random *randp;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
|
|
parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
|
|
/* random key already contains the header */
|
|
memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* add HMAC_ALGO parameter */
|
|
if (stcb->asoc.local_hmacs != NULL) {
|
|
struct sctp_auth_hmac_algo *hmacs;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
|
|
parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
|
|
stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
|
|
hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
|
|
hmacs->ph.param_length = htons(parameter_len);
|
|
sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* add CHUNKS parameter */
|
|
if (stcb->asoc.local_auth_chunks != NULL) {
|
|
struct sctp_auth_chunk_list *chunks;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
|
|
parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
|
|
sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
|
|
chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
|
|
chunks->ph.param_length = htons(parameter_len);
|
|
sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
}
|
|
}
|
|
/* now any cookie time extensions */
|
|
if (stcb->asoc.cookie_preserve_req) {
|
|
struct sctp_cookie_perserve_param *cookie_preserve;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
|
|
cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
|
|
cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
|
|
cookie_preserve->ph.param_length = htons(parameter_len);
|
|
cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
|
|
stcb->asoc.cookie_preserve_req = 0;
|
|
chunk_len += parameter_len;
|
|
}
|
|
if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
|
|
uint8_t i;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
if (stcb->asoc.scope.ipv4_addr_legal) {
|
|
parameter_len += (uint16_t) sizeof(uint16_t);
|
|
}
|
|
if (stcb->asoc.scope.ipv6_addr_legal) {
|
|
parameter_len += (uint16_t) sizeof(uint16_t);
|
|
}
|
|
sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
|
|
sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
|
|
sup_addr->ph.param_length = htons(parameter_len);
|
|
i = 0;
|
|
if (stcb->asoc.scope.ipv4_addr_legal) {
|
|
sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
|
|
}
|
|
if (stcb->asoc.scope.ipv6_addr_legal) {
|
|
sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
|
|
}
|
|
padding_len = 4 - 2 * i;
|
|
chunk_len += parameter_len;
|
|
}
|
|
SCTP_BUF_LEN(m) = chunk_len;
|
|
/* now the addresses */
|
|
/*
|
|
* To optimize this we could put the scoping stuff into a structure
|
|
* and remove the individual uint8's from the assoc structure. Then
|
|
* we could just sifa in the address within the stcb. But for now
|
|
* this is a quick hack to get the address stuff teased apart.
|
|
*/
|
|
m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
|
|
m, cnt_inits_to,
|
|
&padding_len, &chunk_len);
|
|
|
|
init->ch.chunk_length = htons(chunk_len);
|
|
if (padding_len > 0) {
|
|
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
|
|
ret = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
(struct sockaddr *)&net->ro._l_addr,
|
|
m, 0, NULL, 0, 0, 0, 0,
|
|
inp->sctp_lport, stcb->rport, htonl(0),
|
|
net->port, NULL,
|
|
0, 0,
|
|
so_locked);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
|
|
}
|
|
|
|
struct mbuf *
|
|
sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
|
|
int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
|
|
{
|
|
/*
|
|
* Given a mbuf containing an INIT or INIT-ACK with the param_offset
|
|
* being equal to the beginning of the params i.e. (iphlen +
|
|
* sizeof(struct sctp_init_msg) parse through the parameters to the
|
|
* end of the mbuf verifying that all parameters are known.
|
|
*
|
|
* For unknown parameters build and return a mbuf with
|
|
* UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
|
|
* processing this chunk stop, and set *abort_processing to 1.
|
|
*
|
|
* By having param_offset be pre-set to where parameters begin it is
|
|
* hoped that this routine may be reused in the future by new
|
|
* features.
|
|
*/
|
|
struct sctp_paramhdr *phdr, params;
|
|
|
|
struct mbuf *mat, *op_err;
|
|
char tempbuf[SCTP_PARAM_BUFFER_SIZE];
|
|
int at, limit, pad_needed;
|
|
uint16_t ptype, plen, padded_size;
|
|
int err_at;
|
|
|
|
*abort_processing = 0;
|
|
mat = in_initpkt;
|
|
err_at = 0;
|
|
limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
|
|
at = param_offset;
|
|
op_err = NULL;
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
|
|
phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
|
|
while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
|
|
/* wacked parameter */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
limit -= SCTP_SIZE32(plen);
|
|
/*-
|
|
* All parameters for all chunks that we know/understand are
|
|
* listed here. We process them other places and make
|
|
* appropriate stop actions per the upper bits. However this
|
|
* is the generic routine processor's can call to get back
|
|
* an operr.. to either incorporate (init-ack) or send.
|
|
*/
|
|
padded_size = SCTP_SIZE32(plen);
|
|
switch (ptype) {
|
|
/* Param's with variable size */
|
|
case SCTP_HEARTBEAT_INFO:
|
|
case SCTP_STATE_COOKIE:
|
|
case SCTP_UNRECOG_PARAM:
|
|
case SCTP_ERROR_CAUSE_IND:
|
|
/* ok skip fwd */
|
|
at += padded_size;
|
|
break;
|
|
/* Param's with variable size within a range */
|
|
case SCTP_CHUNK_LIST:
|
|
case SCTP_SUPPORTED_CHUNK_EXT:
|
|
if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_SUPPORTED_ADDRTYPE:
|
|
if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_RANDOM:
|
|
if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_SET_PRIM_ADDR:
|
|
case SCTP_DEL_IP_ADDRESS:
|
|
case SCTP_ADD_IP_ADDRESS:
|
|
if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
|
|
(padded_size != sizeof(struct sctp_asconf_addr_param))) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
/* Param's with a fixed size */
|
|
case SCTP_IPV4_ADDRESS:
|
|
if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_IPV6_ADDRESS:
|
|
if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_COOKIE_PRESERVE:
|
|
if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_HAS_NAT_SUPPORT:
|
|
*nat_friendly = 1;
|
|
/* fall through */
|
|
case SCTP_PRSCTP_SUPPORTED:
|
|
if (padded_size != sizeof(struct sctp_paramhdr)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_ECN_CAPABLE:
|
|
if (padded_size != sizeof(struct sctp_paramhdr)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_ULP_ADAPTATION:
|
|
if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_SUCCESS_REPORT:
|
|
if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
|
|
goto invalid_size;
|
|
}
|
|
at += padded_size;
|
|
break;
|
|
case SCTP_HOSTNAME_ADDRESS:
|
|
{
|
|
/* We can NOT handle HOST NAME addresses!! */
|
|
int l_len;
|
|
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
|
|
*abort_processing = 1;
|
|
if (op_err == NULL) {
|
|
/* Ok need to try to get a mbuf */
|
|
#ifdef INET6
|
|
l_len = SCTP_MIN_OVERHEAD;
|
|
#else
|
|
l_len = SCTP_MIN_V4_OVERHEAD;
|
|
#endif
|
|
l_len += sizeof(struct sctp_chunkhdr);
|
|
l_len += plen;
|
|
l_len += sizeof(struct sctp_paramhdr);
|
|
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (op_err) {
|
|
SCTP_BUF_LEN(op_err) = 0;
|
|
/*
|
|
* pre-reserve space for ip
|
|
* and sctp header and
|
|
* chunk hdr
|
|
*/
|
|
#ifdef INET6
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
|
|
#else
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
|
|
#endif
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
|
|
}
|
|
}
|
|
if (op_err) {
|
|
/* If we have space */
|
|
struct sctp_paramhdr s;
|
|
|
|
if (err_at % 4) {
|
|
uint32_t cpthis = 0;
|
|
|
|
pad_needed = 4 - (err_at % 4);
|
|
m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
|
|
err_at += pad_needed;
|
|
}
|
|
s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
|
|
s.param_length = htons(sizeof(s) + plen);
|
|
m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
|
|
err_at += sizeof(s);
|
|
phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
|
|
if (phdr == NULL) {
|
|
sctp_m_freem(op_err);
|
|
/*
|
|
* we are out of memory but
|
|
* we still need to have a
|
|
* look at what to do (the
|
|
* system is in trouble
|
|
* though).
|
|
*/
|
|
return (NULL);
|
|
}
|
|
m_copyback(op_err, err_at, plen, (caddr_t)phdr);
|
|
}
|
|
return (op_err);
|
|
break;
|
|
}
|
|
default:
|
|
/*
|
|
* we do not recognize the parameter figure out what
|
|
* we do.
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
|
|
if ((ptype & 0x4000) == 0x4000) {
|
|
/* Report bit is set?? */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
|
|
if (op_err == NULL) {
|
|
int l_len;
|
|
|
|
/* Ok need to try to get an mbuf */
|
|
#ifdef INET6
|
|
l_len = SCTP_MIN_OVERHEAD;
|
|
#else
|
|
l_len = SCTP_MIN_V4_OVERHEAD;
|
|
#endif
|
|
l_len += sizeof(struct sctp_chunkhdr);
|
|
l_len += plen;
|
|
l_len += sizeof(struct sctp_paramhdr);
|
|
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (op_err) {
|
|
SCTP_BUF_LEN(op_err) = 0;
|
|
#ifdef INET6
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
|
|
#else
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
|
|
#endif
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
|
|
}
|
|
}
|
|
if (op_err) {
|
|
/* If we have space */
|
|
struct sctp_paramhdr s;
|
|
|
|
if (err_at % 4) {
|
|
uint32_t cpthis = 0;
|
|
|
|
pad_needed = 4 - (err_at % 4);
|
|
m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
|
|
err_at += pad_needed;
|
|
}
|
|
s.param_type = htons(SCTP_UNRECOG_PARAM);
|
|
s.param_length = htons(sizeof(s) + plen);
|
|
m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
|
|
err_at += sizeof(s);
|
|
if (plen > sizeof(tempbuf)) {
|
|
plen = sizeof(tempbuf);
|
|
}
|
|
phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
|
|
if (phdr == NULL) {
|
|
sctp_m_freem(op_err);
|
|
/*
|
|
* we are out of memory but
|
|
* we still need to have a
|
|
* look at what to do (the
|
|
* system is in trouble
|
|
* though).
|
|
*/
|
|
op_err = NULL;
|
|
goto more_processing;
|
|
}
|
|
m_copyback(op_err, err_at, plen, (caddr_t)phdr);
|
|
err_at += plen;
|
|
}
|
|
}
|
|
more_processing:
|
|
if ((ptype & 0x8000) == 0x0000) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
|
|
return (op_err);
|
|
} else {
|
|
/* skip this chunk and continue processing */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
|
|
at += SCTP_SIZE32(plen);
|
|
}
|
|
break;
|
|
|
|
}
|
|
phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
|
|
}
|
|
return (op_err);
|
|
invalid_size:
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
|
|
*abort_processing = 1;
|
|
if ((op_err == NULL) && phdr) {
|
|
int l_len;
|
|
#ifdef INET6
|
|
l_len = SCTP_MIN_OVERHEAD;
|
|
#else
|
|
l_len = SCTP_MIN_V4_OVERHEAD;
|
|
#endif
|
|
l_len += sizeof(struct sctp_chunkhdr);
|
|
l_len += (2 * sizeof(struct sctp_paramhdr));
|
|
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (op_err) {
|
|
SCTP_BUF_LEN(op_err) = 0;
|
|
#ifdef INET6
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
|
|
#else
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
|
|
#endif
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
|
|
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
|
|
}
|
|
}
|
|
if ((op_err) && phdr) {
|
|
struct sctp_paramhdr s;
|
|
|
|
if (err_at % 4) {
|
|
uint32_t cpthis = 0;
|
|
|
|
pad_needed = 4 - (err_at % 4);
|
|
m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
|
|
err_at += pad_needed;
|
|
}
|
|
s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
|
|
s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
|
|
m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
|
|
err_at += sizeof(s);
|
|
/* Only copy back the p-hdr that caused the issue */
|
|
m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
|
|
}
|
|
return (op_err);
|
|
}
|
|
|
|
static int
|
|
sctp_are_there_new_addresses(struct sctp_association *asoc,
|
|
struct mbuf *in_initpkt, int offset, struct sockaddr *src)
|
|
{
|
|
/*
|
|
* Given a INIT packet, look through the packet to verify that there
|
|
* are NO new addresses. As we go through the parameters add reports
|
|
* of any un-understood parameters that require an error. Also we
|
|
* must return (1) to drop the packet if we see a un-understood
|
|
* parameter that tells us to drop the chunk.
|
|
*/
|
|
struct sockaddr *sa_touse;
|
|
struct sockaddr *sa;
|
|
struct sctp_paramhdr *phdr, params;
|
|
uint16_t ptype, plen;
|
|
uint8_t fnd;
|
|
struct sctp_nets *net;
|
|
int check_src;
|
|
#ifdef INET
|
|
struct sockaddr_in sin4, *sa4;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 sin6, *sa6;
|
|
#endif
|
|
|
|
#ifdef INET
|
|
memset(&sin4, 0, sizeof(sin4));
|
|
sin4.sin_family = AF_INET;
|
|
sin4.sin_len = sizeof(sin4);
|
|
#endif
|
|
#ifdef INET6
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(sin6);
|
|
#endif
|
|
/* First what about the src address of the pkt ? */
|
|
check_src = 0;
|
|
switch (src->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (asoc->scope.ipv4_addr_legal) {
|
|
check_src = 1;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (asoc->scope.ipv6_addr_legal) {
|
|
check_src = 1;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
break;
|
|
}
|
|
if (check_src) {
|
|
fnd = 0;
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
sa = (struct sockaddr *)&net->ro._l_addr;
|
|
if (sa->sa_family == src->sa_family) {
|
|
#ifdef INET
|
|
if (sa->sa_family == AF_INET) {
|
|
struct sockaddr_in *src4;
|
|
|
|
sa4 = (struct sockaddr_in *)sa;
|
|
src4 = (struct sockaddr_in *)src;
|
|
if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *src6;
|
|
|
|
sa6 = (struct sockaddr_in6 *)sa;
|
|
src6 = (struct sockaddr_in6 *)src;
|
|
if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
if (fnd == 0) {
|
|
/* New address added! no need to look further. */
|
|
return (1);
|
|
}
|
|
}
|
|
/* Ok so far lets munge through the rest of the packet */
|
|
offset += sizeof(struct sctp_init_chunk);
|
|
phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
|
|
while (phdr) {
|
|
sa_touse = NULL;
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
switch (ptype) {
|
|
#ifdef INET
|
|
case SCTP_IPV4_ADDRESS:
|
|
{
|
|
struct sctp_ipv4addr_param *p4, p4_buf;
|
|
|
|
phdr = sctp_get_next_param(in_initpkt, offset,
|
|
(struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
|
|
if (plen != sizeof(struct sctp_ipv4addr_param) ||
|
|
phdr == NULL) {
|
|
return (1);
|
|
}
|
|
if (asoc->scope.ipv4_addr_legal) {
|
|
p4 = (struct sctp_ipv4addr_param *)phdr;
|
|
sin4.sin_addr.s_addr = p4->addr;
|
|
sa_touse = (struct sockaddr *)&sin4;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
case SCTP_IPV6_ADDRESS:
|
|
{
|
|
struct sctp_ipv6addr_param *p6, p6_buf;
|
|
|
|
phdr = sctp_get_next_param(in_initpkt, offset,
|
|
(struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
|
|
if (plen != sizeof(struct sctp_ipv6addr_param) ||
|
|
phdr == NULL) {
|
|
return (1);
|
|
}
|
|
if (asoc->scope.ipv6_addr_legal) {
|
|
p6 = (struct sctp_ipv6addr_param *)phdr;
|
|
memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
|
|
sizeof(p6->addr));
|
|
sa_touse = (struct sockaddr *)&sin6;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
sa_touse = NULL;
|
|
break;
|
|
}
|
|
if (sa_touse) {
|
|
/* ok, sa_touse points to one to check */
|
|
fnd = 0;
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
sa = (struct sockaddr *)&net->ro._l_addr;
|
|
if (sa->sa_family != sa_touse->sa_family) {
|
|
continue;
|
|
}
|
|
#ifdef INET
|
|
if (sa->sa_family == AF_INET) {
|
|
sa4 = (struct sockaddr_in *)sa;
|
|
if (sa4->sin_addr.s_addr ==
|
|
sin4.sin_addr.s_addr) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6) {
|
|
sa6 = (struct sockaddr_in6 *)sa;
|
|
if (SCTP6_ARE_ADDR_EQUAL(
|
|
sa6, &sin6)) {
|
|
fnd = 1;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
if (!fnd) {
|
|
/* New addr added! no need to look further */
|
|
return (1);
|
|
}
|
|
}
|
|
offset += SCTP_SIZE32(plen);
|
|
phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Given a MBUF chain that was sent into us containing an INIT. Build a
|
|
* INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
|
|
* a pullup to include IPv6/4header, SCTP header and initial part of INIT
|
|
* message (i.e. the struct sctp_init_msg).
|
|
*/
|
|
void
|
|
sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
|
|
struct sctp_nets *src_net, struct mbuf *init_pkt,
|
|
int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_init_chunk *init_chk,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id, uint16_t port, int hold_inp_lock)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
|
|
struct sctp_init_ack_chunk *initack;
|
|
struct sctp_adaptation_layer_indication *ali;
|
|
struct sctp_supported_chunk_types_param *pr_supported;
|
|
struct sctp_paramhdr *ph;
|
|
union sctp_sockstore *over_addr;
|
|
struct sctp_scoping scp;
|
|
#ifdef INET
|
|
struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
|
|
struct sockaddr_in *src4 = (struct sockaddr_in *)src;
|
|
struct sockaddr_in *sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
|
|
struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
struct sockaddr *to;
|
|
struct sctp_state_cookie stc;
|
|
struct sctp_nets *net = NULL;
|
|
uint8_t *signature = NULL;
|
|
int cnt_inits_to = 0;
|
|
uint16_t his_limit, i_want;
|
|
int abort_flag;
|
|
int nat_friendly = 0;
|
|
struct socket *so;
|
|
uint16_t num_ext, chunk_len, padding_len, parameter_len;
|
|
|
|
if (stcb) {
|
|
asoc = &stcb->asoc;
|
|
} else {
|
|
asoc = NULL;
|
|
}
|
|
if ((asoc != NULL) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
|
|
if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
|
|
/*
|
|
* new addresses, out of here in non-cookie-wait
|
|
* states
|
|
*
|
|
* Send an ABORT, without the new address error
|
|
* cause. This looks no different than if no
|
|
* listener was present.
|
|
*/
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
"Address added");
|
|
sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
return;
|
|
}
|
|
if (src_net != NULL && (src_net->port != port)) {
|
|
/*
|
|
* change of remote encapsulation port, out of here
|
|
* in non-cookie-wait states
|
|
*
|
|
* Send an ABORT, without an specific error cause.
|
|
* This looks no different than if no listener was
|
|
* present.
|
|
*/
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
"Remote encapsulation port changed");
|
|
sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
return;
|
|
}
|
|
}
|
|
abort_flag = 0;
|
|
op_err = sctp_arethere_unrecognized_parameters(init_pkt,
|
|
(offset + sizeof(struct sctp_init_chunk)),
|
|
&abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
|
|
if (abort_flag) {
|
|
do_a_abort:
|
|
if (op_err == NULL) {
|
|
char msg[SCTP_DIAG_INFO_LEN];
|
|
|
|
snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
}
|
|
sctp_send_abort(init_pkt, iphlen, src, dst, sh,
|
|
init_chk->init.initiate_tag, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
return;
|
|
}
|
|
m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (m == NULL) {
|
|
/* No memory, INIT timer will re-attempt. */
|
|
if (op_err)
|
|
sctp_m_freem(op_err);
|
|
return;
|
|
}
|
|
chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
|
|
padding_len = 0;
|
|
|
|
/*
|
|
* We might not overwrite the identification[] completely and on
|
|
* some platforms time_entered will contain some padding. Therefore
|
|
* zero out the cookie to avoid putting uninitialized memory on the
|
|
* wire.
|
|
*/
|
|
memset(&stc, 0, sizeof(struct sctp_state_cookie));
|
|
|
|
/* the time I built cookie */
|
|
(void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
|
|
|
|
/* populate any tie tags */
|
|
if (asoc != NULL) {
|
|
/* unlock before tag selections */
|
|
stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
|
|
stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
|
|
stc.cookie_life = asoc->cookie_life;
|
|
net = asoc->primary_destination;
|
|
} else {
|
|
stc.tie_tag_my_vtag = 0;
|
|
stc.tie_tag_peer_vtag = 0;
|
|
/* life I will award this cookie */
|
|
stc.cookie_life = inp->sctp_ep.def_cookie_life;
|
|
}
|
|
|
|
/* copy in the ports for later check */
|
|
stc.myport = sh->dest_port;
|
|
stc.peerport = sh->src_port;
|
|
|
|
/*
|
|
* If we wanted to honor cookie life extensions, we would add to
|
|
* stc.cookie_life. For now we should NOT honor any extension
|
|
*/
|
|
stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
stc.ipv6_addr_legal = 1;
|
|
if (SCTP_IPV6_V6ONLY(inp)) {
|
|
stc.ipv4_addr_legal = 0;
|
|
} else {
|
|
stc.ipv4_addr_legal = 1;
|
|
}
|
|
} else {
|
|
stc.ipv6_addr_legal = 0;
|
|
stc.ipv4_addr_legal = 1;
|
|
}
|
|
stc.ipv4_scope = 0;
|
|
if (net == NULL) {
|
|
to = src;
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
{
|
|
/* lookup address */
|
|
stc.address[0] = src4->sin_addr.s_addr;
|
|
stc.address[1] = 0;
|
|
stc.address[2] = 0;
|
|
stc.address[3] = 0;
|
|
stc.addr_type = SCTP_IPV4_ADDRESS;
|
|
/* local from address */
|
|
stc.laddress[0] = dst4->sin_addr.s_addr;
|
|
stc.laddress[1] = 0;
|
|
stc.laddress[2] = 0;
|
|
stc.laddress[3] = 0;
|
|
stc.laddr_type = SCTP_IPV4_ADDRESS;
|
|
/* scope_id is only for v6 */
|
|
stc.scope_id = 0;
|
|
if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
|
|
(IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
|
|
stc.ipv4_scope = 1;
|
|
}
|
|
/* Must use the address in this case */
|
|
if (sctp_is_address_on_local_host(src, vrf_id)) {
|
|
stc.loopback_scope = 1;
|
|
stc.ipv4_scope = 1;
|
|
stc.site_scope = 1;
|
|
stc.local_scope = 0;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
{
|
|
stc.addr_type = SCTP_IPV6_ADDRESS;
|
|
memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
|
|
stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
|
|
if (sctp_is_address_on_local_host(src, vrf_id)) {
|
|
stc.loopback_scope = 1;
|
|
stc.local_scope = 0;
|
|
stc.site_scope = 1;
|
|
stc.ipv4_scope = 1;
|
|
} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
|
|
IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
|
|
/*
|
|
* If the new destination or source
|
|
* is a LINK_LOCAL we must have
|
|
* common both site and local scope.
|
|
* Don't set local scope though
|
|
* since we must depend on the
|
|
* source to be added implicitly. We
|
|
* cannot assure just because we
|
|
* share one link that all links are
|
|
* common.
|
|
*/
|
|
stc.local_scope = 0;
|
|
stc.site_scope = 1;
|
|
stc.ipv4_scope = 1;
|
|
/*
|
|
* we start counting for the private
|
|
* address stuff at 1. since the
|
|
* link local we source from won't
|
|
* show up in our scoped count.
|
|
*/
|
|
cnt_inits_to = 1;
|
|
/* pull out the scope_id from
|
|
* incoming pkt */
|
|
} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
|
|
IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
|
|
/*
|
|
* If the new destination or source
|
|
* is SITE_LOCAL then we must have
|
|
* site scope in common.
|
|
*/
|
|
stc.site_scope = 1;
|
|
}
|
|
memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
|
|
stc.laddr_type = SCTP_IPV6_ADDRESS;
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
goto do_a_abort;
|
|
break;
|
|
}
|
|
} else {
|
|
/* set the scope per the existing tcb */
|
|
|
|
#ifdef INET6
|
|
struct sctp_nets *lnet;
|
|
#endif
|
|
|
|
stc.loopback_scope = asoc->scope.loopback_scope;
|
|
stc.ipv4_scope = asoc->scope.ipv4_local_scope;
|
|
stc.site_scope = asoc->scope.site_scope;
|
|
stc.local_scope = asoc->scope.local_scope;
|
|
#ifdef INET6
|
|
/* Why do we not consider IPv4 LL addresses? */
|
|
TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
|
|
if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
|
|
if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
|
|
/*
|
|
* if we have a LL address, start
|
|
* counting at 1.
|
|
*/
|
|
cnt_inits_to = 1;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
/* use the net pointer */
|
|
to = (struct sockaddr *)&net->ro._l_addr;
|
|
switch (to->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)to;
|
|
stc.address[0] = sin->sin_addr.s_addr;
|
|
stc.address[1] = 0;
|
|
stc.address[2] = 0;
|
|
stc.address[3] = 0;
|
|
stc.addr_type = SCTP_IPV4_ADDRESS;
|
|
if (net->src_addr_selected == 0) {
|
|
/*
|
|
* strange case here, the INIT should have
|
|
* did the selection.
|
|
*/
|
|
net->ro._s_addr = sctp_source_address_selection(inp,
|
|
stcb, (sctp_route_t *) & net->ro,
|
|
net, 0, vrf_id);
|
|
if (net->ro._s_addr == NULL)
|
|
return;
|
|
|
|
net->src_addr_selected = 1;
|
|
|
|
}
|
|
stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
|
|
stc.laddress[1] = 0;
|
|
stc.laddress[2] = 0;
|
|
stc.laddress[3] = 0;
|
|
stc.laddr_type = SCTP_IPV4_ADDRESS;
|
|
/* scope_id is only for v6 */
|
|
stc.scope_id = 0;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)to;
|
|
memcpy(&stc.address, &sin6->sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
stc.addr_type = SCTP_IPV6_ADDRESS;
|
|
stc.scope_id = sin6->sin6_scope_id;
|
|
if (net->src_addr_selected == 0) {
|
|
/*
|
|
* strange case here, the INIT should have
|
|
* done the selection.
|
|
*/
|
|
net->ro._s_addr = sctp_source_address_selection(inp,
|
|
stcb, (sctp_route_t *) & net->ro,
|
|
net, 0, vrf_id);
|
|
if (net->ro._s_addr == NULL)
|
|
return;
|
|
|
|
net->src_addr_selected = 1;
|
|
}
|
|
memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
|
|
sizeof(struct in6_addr));
|
|
stc.laddr_type = SCTP_IPV6_ADDRESS;
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
/* Now lets put the SCTP header in place */
|
|
initack = mtod(m, struct sctp_init_ack_chunk *);
|
|
/* Save it off for quick ref */
|
|
stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
|
|
/* who are we */
|
|
memcpy(stc.identification, SCTP_VERSION_STRING,
|
|
min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
|
|
memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
|
|
/* now the chunk header */
|
|
initack->ch.chunk_type = SCTP_INITIATION_ACK;
|
|
initack->ch.chunk_flags = 0;
|
|
/* fill in later from mbuf we build */
|
|
initack->ch.chunk_length = 0;
|
|
/* place in my tag */
|
|
if ((asoc != NULL) &&
|
|
((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
|
|
/* re-use the v-tags and init-seq here */
|
|
initack->init.initiate_tag = htonl(asoc->my_vtag);
|
|
initack->init.initial_tsn = htonl(asoc->init_seq_number);
|
|
} else {
|
|
uint32_t vtag, itsn;
|
|
|
|
if (hold_inp_lock) {
|
|
SCTP_INP_INCR_REF(inp);
|
|
SCTP_INP_RUNLOCK(inp);
|
|
}
|
|
if (asoc) {
|
|
atomic_add_int(&asoc->refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
new_tag:
|
|
vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
|
|
if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
|
|
/*
|
|
* Got a duplicate vtag on some guy behind a
|
|
* nat make sure we don't use it.
|
|
*/
|
|
goto new_tag;
|
|
}
|
|
initack->init.initiate_tag = htonl(vtag);
|
|
/* get a TSN to use too */
|
|
itsn = sctp_select_initial_TSN(&inp->sctp_ep);
|
|
initack->init.initial_tsn = htonl(itsn);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_add_int(&asoc->refcnt, -1);
|
|
} else {
|
|
vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
|
|
initack->init.initiate_tag = htonl(vtag);
|
|
/* get a TSN to use too */
|
|
initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
|
|
}
|
|
if (hold_inp_lock) {
|
|
SCTP_INP_RLOCK(inp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
}
|
|
}
|
|
/* save away my tag to */
|
|
stc.my_vtag = initack->init.initiate_tag;
|
|
|
|
/* set up some of the credits. */
|
|
so = inp->sctp_socket;
|
|
if (so == NULL) {
|
|
/* memory problem */
|
|
sctp_m_freem(m);
|
|
return;
|
|
} else {
|
|
initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
|
|
}
|
|
/* set what I want */
|
|
his_limit = ntohs(init_chk->init.num_inbound_streams);
|
|
/* choose what I want */
|
|
if (asoc != NULL) {
|
|
if (asoc->streamoutcnt > asoc->pre_open_streams) {
|
|
i_want = asoc->streamoutcnt;
|
|
} else {
|
|
i_want = asoc->pre_open_streams;
|
|
}
|
|
} else {
|
|
i_want = inp->sctp_ep.pre_open_stream_count;
|
|
}
|
|
if (his_limit < i_want) {
|
|
/* I Want more :< */
|
|
initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
|
|
} else {
|
|
/* I can have what I want :> */
|
|
initack->init.num_outbound_streams = htons(i_want);
|
|
}
|
|
/* tell him his limit. */
|
|
initack->init.num_inbound_streams =
|
|
htons(inp->sctp_ep.max_open_streams_intome);
|
|
|
|
/* adaptation layer indication parameter */
|
|
if (inp->sctp_ep.adaptation_layer_indicator_provided) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
|
|
ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
|
|
ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
|
|
ali->ph.param_length = htons(parameter_len);
|
|
ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* ECN parameter */
|
|
if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
|
|
((asoc == NULL) && (inp->ecn_supported == 1))) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
|
|
ph->param_type = htons(SCTP_ECN_CAPABLE);
|
|
ph->param_length = htons(parameter_len);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* PR-SCTP supported parameter */
|
|
if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
|
|
((asoc == NULL) && (inp->prsctp_supported == 1))) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
|
|
ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
|
|
ph->param_length = htons(parameter_len);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* Add NAT friendly parameter */
|
|
if (nat_friendly) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
|
|
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
|
|
ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
|
|
ph->param_length = htons(parameter_len);
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* And now tell the peer which extensions we support */
|
|
num_ext = 0;
|
|
pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
|
|
if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
|
|
((asoc == NULL) && (inp->prsctp_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
|
|
if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
|
|
((asoc == NULL) && (inp->idata_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
|
|
}
|
|
}
|
|
if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
|
|
((asoc == NULL) && (inp->auth_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
|
|
}
|
|
if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
|
|
((asoc == NULL) && (inp->asconf_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
|
|
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
|
|
}
|
|
if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
|
|
((asoc == NULL) && (inp->reconfig_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
|
|
}
|
|
if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
|
|
((asoc == NULL) && (inp->idata_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
|
|
}
|
|
if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
|
|
((asoc == NULL) && (inp->nrsack_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
|
|
}
|
|
if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
|
|
((asoc == NULL) && (inp->pktdrop_supported == 1))) {
|
|
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
|
|
}
|
|
if (num_ext > 0) {
|
|
parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
|
|
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
|
|
pr_supported->ph.param_length = htons(parameter_len);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
}
|
|
/* add authentication parameters */
|
|
if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
|
|
((asoc == NULL) && (inp->auth_supported == 1))) {
|
|
struct sctp_auth_random *randp;
|
|
struct sctp_auth_hmac_algo *hmacs;
|
|
struct sctp_auth_chunk_list *chunks;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
/* generate and add RANDOM parameter */
|
|
randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
|
|
parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
|
|
SCTP_AUTH_RANDOM_SIZE_DEFAULT;
|
|
randp->ph.param_type = htons(SCTP_RANDOM);
|
|
randp->ph.param_length = htons(parameter_len);
|
|
SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
/* add HMAC_ALGO parameter */
|
|
hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
|
|
parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
|
|
sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
|
|
(uint8_t *) hmacs->hmac_ids);
|
|
hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
|
|
hmacs->ph.param_length = htons(parameter_len);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
/* add CHUNKS parameter */
|
|
chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
|
|
parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
|
|
sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
|
|
chunks->chunk_types);
|
|
chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
|
|
chunks->ph.param_length = htons(parameter_len);
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
}
|
|
SCTP_BUF_LEN(m) = chunk_len;
|
|
m_last = m;
|
|
/* now the addresses */
|
|
/*
|
|
* To optimize this we could put the scoping stuff into a structure
|
|
* and remove the individual uint8's from the stc structure. Then we
|
|
* could just sifa in the address within the stc.. but for now this
|
|
* is a quick hack to get the address stuff teased apart.
|
|
*/
|
|
scp.ipv4_addr_legal = stc.ipv4_addr_legal;
|
|
scp.ipv6_addr_legal = stc.ipv6_addr_legal;
|
|
scp.loopback_scope = stc.loopback_scope;
|
|
scp.ipv4_local_scope = stc.ipv4_scope;
|
|
scp.local_scope = stc.local_scope;
|
|
scp.site_scope = stc.site_scope;
|
|
m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
|
|
cnt_inits_to,
|
|
&padding_len, &chunk_len);
|
|
/* padding_len can only be positive, if no addresses have been added */
|
|
if (padding_len > 0) {
|
|
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
|
|
chunk_len += padding_len;
|
|
SCTP_BUF_LEN(m) += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
/* tack on the operational error if present */
|
|
if (op_err) {
|
|
parameter_len = 0;
|
|
for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
|
|
parameter_len += SCTP_BUF_LEN(m_tmp);
|
|
}
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
SCTP_BUF_NEXT(m_last) = op_err;
|
|
while (SCTP_BUF_NEXT(m_last) != NULL) {
|
|
m_last = SCTP_BUF_NEXT(m_last);
|
|
}
|
|
chunk_len += parameter_len;
|
|
}
|
|
if (padding_len > 0) {
|
|
m_last = sctp_add_pad_tombuf(m_last, padding_len);
|
|
if (m_last == NULL) {
|
|
/* Houston we have a problem, no space */
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
chunk_len += padding_len;
|
|
padding_len = 0;
|
|
}
|
|
/* Now we must build a cookie */
|
|
m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
|
|
if (m_cookie == NULL) {
|
|
/* memory problem */
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
/* Now append the cookie to the end and update the space/size */
|
|
SCTP_BUF_NEXT(m_last) = m_cookie;
|
|
parameter_len = 0;
|
|
for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
|
|
parameter_len += SCTP_BUF_LEN(m_tmp);
|
|
if (SCTP_BUF_NEXT(m_tmp) == NULL) {
|
|
m_last = m_tmp;
|
|
}
|
|
}
|
|
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
|
|
chunk_len += parameter_len;
|
|
|
|
/*
|
|
* Place in the size, but we don't include the last pad (if any) in
|
|
* the INIT-ACK.
|
|
*/
|
|
initack->ch.chunk_length = htons(chunk_len);
|
|
|
|
/*
|
|
* Time to sign the cookie, we don't sign over the cookie signature
|
|
* though thus we set trailer.
|
|
*/
|
|
(void)sctp_hmac_m(SCTP_HMAC,
|
|
(uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
|
|
SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
|
|
(uint8_t *) signature, SCTP_SIGNATURE_SIZE);
|
|
/*
|
|
* We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
|
|
* here since the timer will drive a retranmission.
|
|
*/
|
|
if (padding_len > 0) {
|
|
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
|
|
sctp_m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
if (stc.loopback_scope) {
|
|
over_addr = (union sctp_sockstore *)dst;
|
|
} else {
|
|
over_addr = NULL;
|
|
}
|
|
|
|
(void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
|
|
0, 0,
|
|
inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
|
|
port, over_addr,
|
|
mflowtype, mflowid,
|
|
SCTP_SO_NOT_LOCKED);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_prune_prsctp(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_sndrcvinfo *srcv,
|
|
int dataout)
|
|
{
|
|
int freed_spc = 0;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if ((asoc->prsctp_supported) &&
|
|
(asoc->sent_queue_cnt_removeable > 0)) {
|
|
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
|
|
/*
|
|
* Look for chunks marked with the PR_SCTP flag AND
|
|
* the buffer space flag. If the one being sent is
|
|
* equal or greater priority then purge the old one
|
|
* and free some space.
|
|
*/
|
|
if (PR_SCTP_BUF_ENABLED(chk->flags)) {
|
|
/*
|
|
* This one is PR-SCTP AND buffer space
|
|
* limited type
|
|
*/
|
|
if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
|
|
/*
|
|
* Lower numbers equates to higher
|
|
* priority so if the one we are
|
|
* looking at has a larger or equal
|
|
* priority we want to drop the data
|
|
* and NOT retransmit it.
|
|
*/
|
|
if (chk->data) {
|
|
/*
|
|
* We release the book_size
|
|
* if the mbuf is here
|
|
*/
|
|
int ret_spc;
|
|
uint8_t sent;
|
|
|
|
if (chk->sent > SCTP_DATAGRAM_UNSENT)
|
|
sent = 1;
|
|
else
|
|
sent = 0;
|
|
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
|
|
sent,
|
|
SCTP_SO_LOCKED);
|
|
freed_spc += ret_spc;
|
|
if (freed_spc >= dataout) {
|
|
return;
|
|
}
|
|
} /* if chunk was present */
|
|
} /* if of sufficient priority */
|
|
} /* if chunk has enabled */
|
|
} /* tailqforeach */
|
|
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
|
|
/* Here we must move to the sent queue and mark */
|
|
if (PR_SCTP_BUF_ENABLED(chk->flags)) {
|
|
if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
|
|
if (chk->data) {
|
|
/*
|
|
* We release the book_size
|
|
* if the mbuf is here
|
|
*/
|
|
int ret_spc;
|
|
|
|
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
|
|
0, SCTP_SO_LOCKED);
|
|
|
|
freed_spc += ret_spc;
|
|
if (freed_spc >= dataout) {
|
|
return;
|
|
}
|
|
} /* end if chk->data */
|
|
} /* end if right class */
|
|
} /* end if chk pr-sctp */
|
|
} /* tailqforeachsafe (chk) */
|
|
} /* if enabled in asoc */
|
|
}
|
|
|
|
int
|
|
sctp_get_frag_point(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc)
|
|
{
|
|
int siz, ovh;
|
|
|
|
/*
|
|
* For endpoints that have both v6 and v4 addresses we must reserve
|
|
* room for the ipv6 header, for those that are only dealing with V4
|
|
* we use a larger frag point.
|
|
*/
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
ovh = SCTP_MIN_OVERHEAD;
|
|
} else {
|
|
ovh = SCTP_MIN_V4_OVERHEAD;
|
|
}
|
|
if (stcb->asoc.idata_supported) {
|
|
ovh += sizeof(struct sctp_idata_chunk);
|
|
} else {
|
|
ovh += sizeof(struct sctp_data_chunk);
|
|
}
|
|
if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
|
|
siz = asoc->smallest_mtu - ovh;
|
|
else
|
|
siz = (stcb->asoc.sctp_frag_point - ovh);
|
|
/*
|
|
* if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
|
|
*/
|
|
/* A data chunk MUST fit in a cluster */
|
|
/* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
|
|
/* } */
|
|
|
|
/* adjust for an AUTH chunk if DATA requires auth */
|
|
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
|
|
siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
|
|
|
|
if (siz % 4) {
|
|
/* make it an even word boundary please */
|
|
siz -= (siz % 4);
|
|
}
|
|
return (siz);
|
|
}
|
|
|
|
static void
|
|
sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
|
|
{
|
|
/*
|
|
* We assume that the user wants PR_SCTP_TTL if the user provides a
|
|
* positive lifetime but does not specify any PR_SCTP policy.
|
|
*/
|
|
if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
|
|
sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
|
|
} else if (sp->timetolive > 0) {
|
|
sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
|
|
sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
|
|
} else {
|
|
return;
|
|
}
|
|
switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
|
|
case CHUNK_FLAGS_PR_SCTP_BUF:
|
|
/*
|
|
* Time to live is a priority stored in tv_sec when doing
|
|
* the buffer drop thing.
|
|
*/
|
|
sp->ts.tv_sec = sp->timetolive;
|
|
sp->ts.tv_usec = 0;
|
|
break;
|
|
case CHUNK_FLAGS_PR_SCTP_TTL:
|
|
{
|
|
struct timeval tv;
|
|
|
|
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
|
|
tv.tv_sec = sp->timetolive / 1000;
|
|
tv.tv_usec = (sp->timetolive * 1000) % 1000000;
|
|
/*
|
|
* TODO sctp_constants.h needs alternative time
|
|
* macros when _KERNEL is undefined.
|
|
*/
|
|
timevaladd(&sp->ts, &tv);
|
|
}
|
|
break;
|
|
case CHUNK_FLAGS_PR_SCTP_RTX:
|
|
/*
|
|
* Time to live is a the number or retransmissions stored in
|
|
* tv_sec.
|
|
*/
|
|
sp->ts.tv_sec = sp->timetolive;
|
|
sp->ts.tv_usec = 0;
|
|
break;
|
|
default:
|
|
SCTPDBG(SCTP_DEBUG_USRREQ1,
|
|
"Unknown PR_SCTP policy %u.\n",
|
|
PR_SCTP_POLICY(sp->sinfo_flags));
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
sctp_msg_append(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct mbuf *m,
|
|
struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
|
|
{
|
|
int error = 0;
|
|
struct mbuf *at;
|
|
struct sctp_stream_queue_pending *sp = NULL;
|
|
struct sctp_stream_out *strm;
|
|
|
|
/*
|
|
* Given an mbuf chain, put it into the association send queue and
|
|
* place it on the wheel
|
|
*/
|
|
if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
|
|
/* Invalid stream number */
|
|
SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_now;
|
|
}
|
|
if ((stcb->asoc.stream_locked) &&
|
|
(stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_now;
|
|
}
|
|
strm = &stcb->asoc.strmout[srcv->sinfo_stream];
|
|
/* Now can we send this? */
|
|
if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
/* got data while shutting down */
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
|
|
error = ECONNRESET;
|
|
goto out_now;
|
|
}
|
|
sctp_alloc_a_strmoq(stcb, sp);
|
|
if (sp == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
error = ENOMEM;
|
|
goto out_now;
|
|
}
|
|
sp->sinfo_flags = srcv->sinfo_flags;
|
|
sp->timetolive = srcv->sinfo_timetolive;
|
|
sp->ppid = srcv->sinfo_ppid;
|
|
sp->context = srcv->sinfo_context;
|
|
sp->fsn = 0;
|
|
if (sp->sinfo_flags & SCTP_ADDR_OVER) {
|
|
sp->net = net;
|
|
atomic_add_int(&sp->net->ref_count, 1);
|
|
} else {
|
|
sp->net = NULL;
|
|
}
|
|
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
|
|
sp->sid = srcv->sinfo_stream;
|
|
sp->msg_is_complete = 1;
|
|
sp->sender_all_done = 1;
|
|
sp->some_taken = 0;
|
|
sp->data = m;
|
|
sp->tail_mbuf = NULL;
|
|
sctp_set_prsctp_policy(sp);
|
|
/*
|
|
* We could in theory (for sendall) sifa the length in, but we would
|
|
* still have to hunt through the chain since we need to setup the
|
|
* tail_mbuf
|
|
*/
|
|
sp->length = 0;
|
|
for (at = m; at; at = SCTP_BUF_NEXT(at)) {
|
|
if (SCTP_BUF_NEXT(at) == NULL)
|
|
sp->tail_mbuf = at;
|
|
sp->length += SCTP_BUF_LEN(at);
|
|
}
|
|
if (srcv->sinfo_keynumber_valid) {
|
|
sp->auth_keyid = srcv->sinfo_keynumber;
|
|
} else {
|
|
sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
|
|
}
|
|
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
|
|
sctp_auth_key_acquire(stcb, sp->auth_keyid);
|
|
sp->holds_key_ref = 1;
|
|
}
|
|
if (hold_stcb_lock == 0) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
}
|
|
sctp_snd_sb_alloc(stcb, sp->length);
|
|
atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
|
|
TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
|
|
stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
|
|
m = NULL;
|
|
if (hold_stcb_lock == 0) {
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
}
|
|
out_now:
|
|
if (m) {
|
|
sctp_m_freem(m);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
|
|
static struct mbuf *
|
|
sctp_copy_mbufchain(struct mbuf *clonechain,
|
|
struct mbuf *outchain,
|
|
struct mbuf **endofchain,
|
|
int can_take_mbuf,
|
|
int sizeofcpy,
|
|
uint8_t copy_by_ref)
|
|
{
|
|
struct mbuf *m;
|
|
struct mbuf *appendchain;
|
|
caddr_t cp;
|
|
int len;
|
|
|
|
if (endofchain == NULL) {
|
|
/* error */
|
|
error_out:
|
|
if (outchain)
|
|
sctp_m_freem(outchain);
|
|
return (NULL);
|
|
}
|
|
if (can_take_mbuf) {
|
|
appendchain = clonechain;
|
|
} else {
|
|
if (!copy_by_ref &&
|
|
(sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
|
|
) {
|
|
/* Its not in a cluster */
|
|
if (*endofchain == NULL) {
|
|
/* lets get a mbuf cluster */
|
|
if (outchain == NULL) {
|
|
/* This is the general case */
|
|
new_mbuf:
|
|
outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (outchain == NULL) {
|
|
goto error_out;
|
|
}
|
|
SCTP_BUF_LEN(outchain) = 0;
|
|
*endofchain = outchain;
|
|
/* get the prepend space */
|
|
SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
|
|
} else {
|
|
/* We really should not get a NULL
|
|
* in endofchain */
|
|
/* find end */
|
|
m = outchain;
|
|
while (m) {
|
|
if (SCTP_BUF_NEXT(m) == NULL) {
|
|
*endofchain = m;
|
|
break;
|
|
}
|
|
m = SCTP_BUF_NEXT(m);
|
|
}
|
|
/* sanity */
|
|
if (*endofchain == NULL) {
|
|
/* huh, TSNH XXX maybe we
|
|
* should panic */
|
|
sctp_m_freem(outchain);
|
|
goto new_mbuf;
|
|
}
|
|
}
|
|
/* get the new end of length */
|
|
len = (int)M_TRAILINGSPACE(*endofchain);
|
|
} else {
|
|
/* how much is left at the end? */
|
|
len = (int)M_TRAILINGSPACE(*endofchain);
|
|
}
|
|
/* Find the end of the data, for appending */
|
|
cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
|
|
|
|
/* Now lets copy it out */
|
|
if (len >= sizeofcpy) {
|
|
/* It all fits, copy it in */
|
|
m_copydata(clonechain, 0, sizeofcpy, cp);
|
|
SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
|
|
} else {
|
|
/* fill up the end of the chain */
|
|
if (len > 0) {
|
|
m_copydata(clonechain, 0, len, cp);
|
|
SCTP_BUF_LEN((*endofchain)) += len;
|
|
/* now we need another one */
|
|
sizeofcpy -= len;
|
|
}
|
|
m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (m == NULL) {
|
|
/* We failed */
|
|
goto error_out;
|
|
}
|
|
SCTP_BUF_NEXT((*endofchain)) = m;
|
|
*endofchain = m;
|
|
cp = mtod((*endofchain), caddr_t);
|
|
m_copydata(clonechain, len, sizeofcpy, cp);
|
|
SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
|
|
}
|
|
return (outchain);
|
|
} else {
|
|
/* copy the old fashion way */
|
|
appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
if (appendchain == NULL) {
|
|
/* error */
|
|
if (outchain)
|
|
sctp_m_freem(outchain);
|
|
return (NULL);
|
|
}
|
|
if (outchain) {
|
|
/* tack on to the end */
|
|
if (*endofchain != NULL) {
|
|
SCTP_BUF_NEXT(((*endofchain))) = appendchain;
|
|
} else {
|
|
m = outchain;
|
|
while (m) {
|
|
if (SCTP_BUF_NEXT(m) == NULL) {
|
|
SCTP_BUF_NEXT(m) = appendchain;
|
|
break;
|
|
}
|
|
m = SCTP_BUF_NEXT(m);
|
|
}
|
|
}
|
|
/*
|
|
* save off the end and update the end-chain position
|
|
*/
|
|
m = appendchain;
|
|
while (m) {
|
|
if (SCTP_BUF_NEXT(m) == NULL) {
|
|
*endofchain = m;
|
|
break;
|
|
}
|
|
m = SCTP_BUF_NEXT(m);
|
|
}
|
|
return (outchain);
|
|
} else {
|
|
/* save off the end and update the end-chain position */
|
|
m = appendchain;
|
|
while (m) {
|
|
if (SCTP_BUF_NEXT(m) == NULL) {
|
|
*endofchain = m;
|
|
break;
|
|
}
|
|
m = SCTP_BUF_NEXT(m);
|
|
}
|
|
return (appendchain);
|
|
}
|
|
}
|
|
|
|
static int
|
|
sctp_med_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
int *num_out,
|
|
int *reason_code,
|
|
int control_only, int from_where,
|
|
struct timeval *now, int *now_filled, int frag_point, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
);
|
|
|
|
static void
|
|
sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
|
|
uint32_t val SCTP_UNUSED)
|
|
{
|
|
struct sctp_copy_all *ca;
|
|
struct mbuf *m;
|
|
int ret = 0;
|
|
int added_control = 0;
|
|
int un_sent, do_chunk_output = 1;
|
|
struct sctp_association *asoc;
|
|
struct sctp_nets *net;
|
|
|
|
ca = (struct sctp_copy_all *)ptr;
|
|
if (ca->m == NULL) {
|
|
return;
|
|
}
|
|
if (ca->inp != inp) {
|
|
/* TSNH */
|
|
return;
|
|
}
|
|
if (ca->sndlen > 0) {
|
|
m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
|
|
if (m == NULL) {
|
|
/* can't copy so we are done */
|
|
ca->cnt_failed++;
|
|
return;
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(m, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
} else {
|
|
m = NULL;
|
|
}
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if (stcb->asoc.alternate) {
|
|
net = stcb->asoc.alternate;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
|
|
/* Abort this assoc with m as the user defined reason */
|
|
if (m != NULL) {
|
|
SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
|
|
} else {
|
|
m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
|
|
0, M_NOWAIT, 1, MT_DATA);
|
|
SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
|
|
}
|
|
if (m != NULL) {
|
|
struct sctp_paramhdr *ph;
|
|
|
|
ph = mtod(m, struct sctp_paramhdr *);
|
|
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + ca->sndlen));
|
|
}
|
|
/*
|
|
* We add one here to keep the assoc from dis-appearing on
|
|
* us.
|
|
*/
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
|
|
/*
|
|
* sctp_abort_an_association calls sctp_free_asoc() free
|
|
* association will NOT free it since we incremented the
|
|
* refcnt .. we do this to prevent it being freed and things
|
|
* getting tricky since we could end up (from free_asoc)
|
|
* calling inpcb_free which would get a recursive lock call
|
|
* to the iterator lock.. But as a consequence of that the
|
|
* stcb will return to us un-locked.. since free_asoc
|
|
* returns with either no TCB or the TCB unlocked, we must
|
|
* relock.. to unlock in the iterator timer :-0
|
|
*/
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
goto no_chunk_output;
|
|
} else {
|
|
if (m) {
|
|
ret = sctp_msg_append(stcb, net, m,
|
|
&ca->sndrcv, 1);
|
|
}
|
|
asoc = &stcb->asoc;
|
|
if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
|
|
/* shutdown this assoc */
|
|
if (TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->sent_queue) &&
|
|
sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
|
|
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
|
|
goto abort_anyway;
|
|
}
|
|
/* there is nothing queued to send, so I'm
|
|
* done... */
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
/* only send SHUTDOWN the first time
|
|
* through */
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
|
|
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
|
|
sctp_stop_timers_for_shutdown(stcb);
|
|
sctp_send_shutdown(stcb, net);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
|
|
net);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
added_control = 1;
|
|
do_chunk_output = 0;
|
|
}
|
|
} else {
|
|
/*
|
|
* we still got (or just got) data to send,
|
|
* so set SHUTDOWN_PENDING
|
|
*/
|
|
/*
|
|
* XXX sockets draft says that SCTP_EOF
|
|
* should be sent with no data. currently,
|
|
* we will allow user data to be sent first
|
|
* and move to SHUTDOWN-PENDING
|
|
*/
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
|
|
asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
|
|
}
|
|
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
|
|
if (TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->sent_queue) &&
|
|
(asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
|
|
struct mbuf *op_err;
|
|
char msg[SCTP_DIAG_INFO_LEN];
|
|
|
|
abort_anyway:
|
|
snprintf(msg, sizeof(msg),
|
|
"%s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb,
|
|
op_err, SCTP_SO_NOT_LOCKED);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
goto no_chunk_output;
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
|
|
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
|
|
|
|
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
|
|
(stcb->asoc.total_flight > 0) &&
|
|
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
|
|
do_chunk_output = 0;
|
|
}
|
|
if (do_chunk_output)
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
|
|
else if (added_control) {
|
|
int num_out, reason, now_filled = 0;
|
|
struct timeval now;
|
|
int frag_point;
|
|
|
|
frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
|
|
(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
|
|
&reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
no_chunk_output:
|
|
if (ret) {
|
|
ca->cnt_failed++;
|
|
} else {
|
|
ca->cnt_sent++;
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
|
|
{
|
|
struct sctp_copy_all *ca;
|
|
|
|
ca = (struct sctp_copy_all *)ptr;
|
|
/*
|
|
* Do a notify here? Kacheong suggests that the notify be done at
|
|
* the send time.. so you would push up a notification if any send
|
|
* failed. Don't know if this is feasible since the only failures we
|
|
* have is "memory" related and if you cannot get an mbuf to send
|
|
* the data you surely can't get an mbuf to send up to notify the
|
|
* user you can't send the data :->
|
|
*/
|
|
|
|
/* now free everything */
|
|
sctp_m_freem(ca->m);
|
|
SCTP_FREE(ca, SCTP_M_COPYAL);
|
|
}
|
|
|
|
static struct mbuf *
|
|
sctp_copy_out_all(struct uio *uio, int len)
|
|
{
|
|
struct mbuf *ret, *at;
|
|
int left, willcpy, cancpy, error;
|
|
|
|
ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
|
|
if (ret == NULL) {
|
|
/* TSNH */
|
|
return (NULL);
|
|
}
|
|
left = len;
|
|
SCTP_BUF_LEN(ret) = 0;
|
|
/* save space for the data chunk header */
|
|
cancpy = (int)M_TRAILINGSPACE(ret);
|
|
willcpy = min(cancpy, left);
|
|
at = ret;
|
|
while (left > 0) {
|
|
/* Align data to the end */
|
|
error = uiomove(mtod(at, caddr_t), willcpy, uio);
|
|
if (error) {
|
|
err_out_now:
|
|
sctp_m_freem(at);
|
|
return (NULL);
|
|
}
|
|
SCTP_BUF_LEN(at) = willcpy;
|
|
SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
|
|
left -= willcpy;
|
|
if (left > 0) {
|
|
SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
|
|
if (SCTP_BUF_NEXT(at) == NULL) {
|
|
goto err_out_now;
|
|
}
|
|
at = SCTP_BUF_NEXT(at);
|
|
SCTP_BUF_LEN(at) = 0;
|
|
cancpy = (int)M_TRAILINGSPACE(at);
|
|
willcpy = min(cancpy, left);
|
|
}
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
|
|
struct sctp_sndrcvinfo *srcv)
|
|
{
|
|
int ret;
|
|
struct sctp_copy_all *ca;
|
|
|
|
SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
|
|
SCTP_M_COPYAL);
|
|
if (ca == NULL) {
|
|
sctp_m_freem(m);
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
memset(ca, 0, sizeof(struct sctp_copy_all));
|
|
|
|
ca->inp = inp;
|
|
if (srcv) {
|
|
memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
|
|
}
|
|
/*
|
|
* take off the sendall flag, it would be bad if we failed to do
|
|
* this :-0
|
|
*/
|
|
ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
|
|
/* get length and mbuf chain */
|
|
if (uio) {
|
|
ca->sndlen = (int)uio->uio_resid;
|
|
ca->m = sctp_copy_out_all(uio, ca->sndlen);
|
|
if (ca->m == NULL) {
|
|
SCTP_FREE(ca, SCTP_M_COPYAL);
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
} else {
|
|
/* Gather the length of the send */
|
|
struct mbuf *mat;
|
|
|
|
ca->sndlen = 0;
|
|
for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
|
|
ca->sndlen += SCTP_BUF_LEN(mat);
|
|
}
|
|
}
|
|
ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
|
|
SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
|
|
SCTP_ASOC_ANY_STATE,
|
|
(void *)ca, 0,
|
|
sctp_sendall_completes, inp, 1);
|
|
if (ret) {
|
|
SCTP_PRINTF("Failed to initiate iterator for sendall\n");
|
|
SCTP_FREE(ca, SCTP_M_COPYAL);
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
|
|
return (EFAULT);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
|
|
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
sctp_toss_old_asconf(struct sctp_tcb *stcb)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
struct sctp_asconf_chunk *acp;
|
|
|
|
asoc = &stcb->asoc;
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
|
|
/* find SCTP_ASCONF chunk in queue */
|
|
if (chk->rec.chunk_id.id == SCTP_ASCONF) {
|
|
if (chk->data) {
|
|
acp = mtod(chk->data, struct sctp_asconf_chunk *);
|
|
if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
|
|
/* Not Acked yet */
|
|
break;
|
|
}
|
|
}
|
|
TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_clean_up_datalist(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_tmit_chunk **data_list,
|
|
int bundle_at,
|
|
struct sctp_nets *net)
|
|
{
|
|
int i;
|
|
struct sctp_tmit_chunk *tp1;
|
|
|
|
for (i = 0; i < bundle_at; i++) {
|
|
/* off of the send queue */
|
|
TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
|
|
asoc->send_queue_cnt--;
|
|
if (i > 0) {
|
|
/*
|
|
* Any chunk NOT 0 you zap the time chunk 0 gets
|
|
* zapped or set based on if a RTO measurment is
|
|
* needed.
|
|
*/
|
|
data_list[i]->do_rtt = 0;
|
|
}
|
|
/* record time */
|
|
data_list[i]->sent_rcv_time = net->last_sent_time;
|
|
data_list[i]->rec.data.cwnd_at_send = net->cwnd;
|
|
data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
|
|
if (data_list[i]->whoTo == NULL) {
|
|
data_list[i]->whoTo = net;
|
|
atomic_add_int(&net->ref_count, 1);
|
|
}
|
|
/* on to the sent queue */
|
|
tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
|
|
if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
|
|
struct sctp_tmit_chunk *tpp;
|
|
|
|
/* need to move back */
|
|
back_up_more:
|
|
tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
|
|
if (tpp == NULL) {
|
|
TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
|
|
goto all_done;
|
|
}
|
|
tp1 = tpp;
|
|
if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
|
|
goto back_up_more;
|
|
}
|
|
TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
|
|
} else {
|
|
TAILQ_INSERT_TAIL(&asoc->sent_queue,
|
|
data_list[i],
|
|
sctp_next);
|
|
}
|
|
all_done:
|
|
/* This does not lower until the cum-ack passes it */
|
|
asoc->sent_queue_cnt++;
|
|
if ((asoc->peers_rwnd <= 0) &&
|
|
(asoc->total_flight == 0) &&
|
|
(bundle_at == 1)) {
|
|
/* Mark the chunk as being a window probe */
|
|
SCTP_STAT_INCR(sctps_windowprobed);
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC2, 3);
|
|
#endif
|
|
data_list[i]->sent = SCTP_DATAGRAM_SENT;
|
|
data_list[i]->snd_count = 1;
|
|
data_list[i]->rec.data.chunk_was_revoked = 0;
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
|
|
sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
|
|
data_list[i]->whoTo->flight_size,
|
|
data_list[i]->book_size,
|
|
(uint32_t) (uintptr_t) data_list[i]->whoTo,
|
|
data_list[i]->rec.data.tsn);
|
|
}
|
|
sctp_flight_size_increase(data_list[i]);
|
|
sctp_total_flight_increase(stcb, data_list[i]);
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
|
|
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
|
|
asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
|
|
}
|
|
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
|
|
(uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
|
|
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
|
|
/* SWS sender side engages */
|
|
asoc->peers_rwnd = 0;
|
|
}
|
|
}
|
|
if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
|
|
(*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
|
|
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
|
|
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
|
|
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
|
|
(chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
|
|
(chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
|
|
(chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
|
|
(chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
|
|
(chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
|
|
/* Stray chunks must be cleaned up */
|
|
clean_up_anyway:
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
|
|
asoc->fwd_tsn_cnt--;
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
} else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
|
|
/* special handling, we must look into the param */
|
|
if (chk != asoc->str_reset) {
|
|
goto clean_up_anyway;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_can_we_split_this(struct sctp_tcb *stcb,
|
|
uint32_t length,
|
|
uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
|
|
{
|
|
/*
|
|
* Make a decision on if I should split a msg into multiple parts.
|
|
* This is only asked of incomplete messages.
|
|
*/
|
|
if (eeor_on) {
|
|
/*
|
|
* If we are doing EEOR we need to always send it if its the
|
|
* entire thing, since it might be all the guy is putting in
|
|
* the hopper.
|
|
*/
|
|
if (goal_mtu >= length) {
|
|
/*-
|
|
* If we have data outstanding,
|
|
* we get another chance when the sack
|
|
* arrives to transmit - wait for more data
|
|
*/
|
|
if (stcb->asoc.total_flight == 0) {
|
|
/*
|
|
* If nothing is in flight, we zero the
|
|
* packet counter.
|
|
*/
|
|
return (length);
|
|
}
|
|
return (0);
|
|
|
|
} else {
|
|
/* You can fill the rest */
|
|
return (goal_mtu);
|
|
}
|
|
}
|
|
/*-
|
|
* For those strange folk that make the send buffer
|
|
* smaller than our fragmentation point, we can't
|
|
* get a full msg in so we have to allow splitting.
|
|
*/
|
|
if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
|
|
return (length);
|
|
}
|
|
if ((length <= goal_mtu) ||
|
|
((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
|
|
/* Sub-optimial residual don't split in non-eeor mode. */
|
|
return (0);
|
|
}
|
|
/*
|
|
* If we reach here length is larger than the goal_mtu. Do we wish
|
|
* to split it for the sake of packet putting together?
|
|
*/
|
|
if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
|
|
/* Its ok to split it */
|
|
return (min(goal_mtu, frag_point));
|
|
}
|
|
/* Nope, can't split */
|
|
return (0);
|
|
|
|
}
|
|
|
|
static uint32_t
|
|
sctp_move_to_outqueue(struct sctp_tcb *stcb,
|
|
struct sctp_stream_out *strq,
|
|
uint32_t goal_mtu,
|
|
uint32_t frag_point,
|
|
int *giveup,
|
|
int eeor_mode,
|
|
int *bail,
|
|
int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
/* Move from the stream to the send_queue keeping track of the total */
|
|
struct sctp_association *asoc;
|
|
struct sctp_stream_queue_pending *sp;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_data_chunk *dchkh = NULL;
|
|
struct sctp_idata_chunk *ndchkh = NULL;
|
|
uint32_t to_move, length;
|
|
int leading;
|
|
uint8_t rcv_flags = 0;
|
|
uint8_t some_taken;
|
|
uint8_t send_lock_up = 0;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
asoc = &stcb->asoc;
|
|
one_more_time:
|
|
/* sa_ignore FREED_MEMORY */
|
|
sp = TAILQ_FIRST(&strq->outqueue);
|
|
if (sp == NULL) {
|
|
if (send_lock_up == 0) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
}
|
|
sp = TAILQ_FIRST(&strq->outqueue);
|
|
if (sp) {
|
|
goto one_more_time;
|
|
}
|
|
if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
|
|
(stcb->asoc.idata_supported == 0) &&
|
|
(strq->last_msg_incomplete)) {
|
|
SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
|
|
strq->sid,
|
|
strq->last_msg_incomplete);
|
|
strq->last_msg_incomplete = 0;
|
|
}
|
|
to_move = 0;
|
|
if (send_lock_up) {
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
send_lock_up = 0;
|
|
}
|
|
goto out_of;
|
|
}
|
|
if ((sp->msg_is_complete) && (sp->length == 0)) {
|
|
if (sp->sender_all_done) {
|
|
/*
|
|
* We are doing differed cleanup. Last time through
|
|
* when we took all the data the sender_all_done was
|
|
* not set.
|
|
*/
|
|
if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
|
|
SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
|
|
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
|
|
sp->sender_all_done,
|
|
sp->length,
|
|
sp->msg_is_complete,
|
|
sp->put_last_out,
|
|
send_lock_up);
|
|
}
|
|
if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
}
|
|
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
|
|
TAILQ_REMOVE(&strq->outqueue, sp, next);
|
|
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
|
|
if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
|
|
(strq->chunks_on_queues == 0) &&
|
|
TAILQ_EMPTY(&strq->outqueue)) {
|
|
stcb->asoc.trigger_reset = 1;
|
|
}
|
|
if (sp->net) {
|
|
sctp_free_remote_addr(sp->net);
|
|
sp->net = NULL;
|
|
}
|
|
if (sp->data) {
|
|
sctp_m_freem(sp->data);
|
|
sp->data = NULL;
|
|
}
|
|
sctp_free_a_strmoq(stcb, sp, so_locked);
|
|
/* we can't be locked to it */
|
|
if (send_lock_up) {
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
send_lock_up = 0;
|
|
}
|
|
/* back to get the next msg */
|
|
goto one_more_time;
|
|
} else {
|
|
/*
|
|
* sender just finished this but still holds a
|
|
* reference
|
|
*/
|
|
*giveup = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
}
|
|
} else {
|
|
/* is there some to get */
|
|
if (sp->length == 0) {
|
|
/* no */
|
|
*giveup = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
} else if (sp->discard_rest) {
|
|
if (send_lock_up == 0) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
}
|
|
/* Whack down the size */
|
|
atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
|
|
if ((stcb->sctp_socket != NULL) &&
|
|
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
|
|
atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
|
|
}
|
|
if (sp->data) {
|
|
sctp_m_freem(sp->data);
|
|
sp->data = NULL;
|
|
sp->tail_mbuf = NULL;
|
|
}
|
|
sp->length = 0;
|
|
sp->some_taken = 1;
|
|
*giveup = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
}
|
|
}
|
|
some_taken = sp->some_taken;
|
|
re_look:
|
|
length = sp->length;
|
|
if (sp->msg_is_complete) {
|
|
/* The message is complete */
|
|
to_move = min(length, frag_point);
|
|
if (to_move == length) {
|
|
/* All of it fits in the MTU */
|
|
if (sp->some_taken) {
|
|
rcv_flags |= SCTP_DATA_LAST_FRAG;
|
|
} else {
|
|
rcv_flags |= SCTP_DATA_NOT_FRAG;
|
|
}
|
|
sp->put_last_out = 1;
|
|
if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
|
|
rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
|
|
}
|
|
} else {
|
|
/* Not all of it fits, we fragment */
|
|
if (sp->some_taken == 0) {
|
|
rcv_flags |= SCTP_DATA_FIRST_FRAG;
|
|
}
|
|
sp->some_taken = 1;
|
|
}
|
|
} else {
|
|
to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
|
|
if (to_move) {
|
|
/*-
|
|
* We use a snapshot of length in case it
|
|
* is expanding during the compare.
|
|
*/
|
|
uint32_t llen;
|
|
|
|
llen = length;
|
|
if (to_move >= llen) {
|
|
to_move = llen;
|
|
if (send_lock_up == 0) {
|
|
/*-
|
|
* We are taking all of an incomplete msg
|
|
* thus we need a send lock.
|
|
*/
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
if (sp->msg_is_complete) {
|
|
/* the sender finished the
|
|
* msg */
|
|
goto re_look;
|
|
}
|
|
}
|
|
}
|
|
if (sp->some_taken == 0) {
|
|
rcv_flags |= SCTP_DATA_FIRST_FRAG;
|
|
sp->some_taken = 1;
|
|
}
|
|
} else {
|
|
/* Nothing to take. */
|
|
*giveup = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
}
|
|
}
|
|
|
|
/* If we reach here, we can copy out a chunk */
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* No chunk memory */
|
|
*giveup = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
}
|
|
/*
|
|
* Setup for unordered if needed by looking at the user sent info
|
|
* flags.
|
|
*/
|
|
if (sp->sinfo_flags & SCTP_UNORDERED) {
|
|
rcv_flags |= SCTP_DATA_UNORDERED;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
|
|
(sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
|
|
rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
|
|
}
|
|
/* clear out the chunk before setting up */
|
|
memset(chk, 0, sizeof(*chk));
|
|
chk->rec.data.rcv_flags = rcv_flags;
|
|
|
|
if (to_move >= length) {
|
|
/* we think we can steal the whole thing */
|
|
if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
}
|
|
if (to_move < sp->length) {
|
|
/* bail, it changed */
|
|
goto dont_do_it;
|
|
}
|
|
chk->data = sp->data;
|
|
chk->last_mbuf = sp->tail_mbuf;
|
|
/* register the stealing */
|
|
sp->data = sp->tail_mbuf = NULL;
|
|
} else {
|
|
struct mbuf *m;
|
|
|
|
dont_do_it:
|
|
chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
|
|
chk->last_mbuf = NULL;
|
|
if (chk->data == NULL) {
|
|
sp->some_taken = some_taken;
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
*bail = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
/* Pull off the data */
|
|
m_adj(sp->data, to_move);
|
|
/* Now lets work our way down and compact it */
|
|
m = sp->data;
|
|
while (m && (SCTP_BUF_LEN(m) == 0)) {
|
|
sp->data = SCTP_BUF_NEXT(m);
|
|
SCTP_BUF_NEXT(m) = NULL;
|
|
if (sp->tail_mbuf == m) {
|
|
/*-
|
|
* Freeing tail? TSNH since
|
|
* we supposedly were taking less
|
|
* than the sp->length.
|
|
*/
|
|
#ifdef INVARIANTS
|
|
panic("Huh, freing tail? - TSNH");
|
|
#else
|
|
SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
|
|
sp->tail_mbuf = sp->data = NULL;
|
|
sp->length = 0;
|
|
#endif
|
|
|
|
}
|
|
sctp_m_free(m);
|
|
m = sp->data;
|
|
}
|
|
}
|
|
if (SCTP_BUF_IS_EXTENDED(chk->data)) {
|
|
chk->copy_by_ref = 1;
|
|
} else {
|
|
chk->copy_by_ref = 0;
|
|
}
|
|
/*
|
|
* get last_mbuf and counts of mb usage This is ugly but hopefully
|
|
* its only one mbuf.
|
|
*/
|
|
if (chk->last_mbuf == NULL) {
|
|
chk->last_mbuf = chk->data;
|
|
while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
|
|
chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
|
|
}
|
|
}
|
|
if (to_move > length) {
|
|
/*- This should not happen either
|
|
* since we always lower to_move to the size
|
|
* of sp->length if its larger.
|
|
*/
|
|
#ifdef INVARIANTS
|
|
panic("Huh, how can to_move be larger?");
|
|
#else
|
|
SCTP_PRINTF("Huh, how can to_move be larger?\n");
|
|
sp->length = 0;
|
|
#endif
|
|
} else {
|
|
atomic_subtract_int(&sp->length, to_move);
|
|
}
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
leading = sizeof(struct sctp_data_chunk);
|
|
} else {
|
|
leading = sizeof(struct sctp_idata_chunk);
|
|
}
|
|
if (M_LEADINGSPACE(chk->data) < leading) {
|
|
/* Not enough room for a chunk header, get some */
|
|
struct mbuf *m;
|
|
|
|
m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
|
|
if (m == NULL) {
|
|
/*
|
|
* we're in trouble here. _PREPEND below will free
|
|
* all the data if there is no leading space, so we
|
|
* must put the data back and restore.
|
|
*/
|
|
if (send_lock_up == 0) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
}
|
|
if (sp->data == NULL) {
|
|
/* unsteal the data */
|
|
sp->data = chk->data;
|
|
sp->tail_mbuf = chk->last_mbuf;
|
|
} else {
|
|
struct mbuf *m_tmp;
|
|
|
|
/* reassemble the data */
|
|
m_tmp = sp->data;
|
|
sp->data = chk->data;
|
|
SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
|
|
}
|
|
sp->some_taken = some_taken;
|
|
atomic_add_int(&sp->length, to_move);
|
|
chk->data = NULL;
|
|
*bail = 1;
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
to_move = 0;
|
|
goto out_of;
|
|
} else {
|
|
SCTP_BUF_LEN(m) = 0;
|
|
SCTP_BUF_NEXT(m) = chk->data;
|
|
chk->data = m;
|
|
M_ALIGN(chk->data, 4);
|
|
}
|
|
}
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
|
|
} else {
|
|
SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_idata_chunk), M_NOWAIT);
|
|
}
|
|
if (chk->data == NULL) {
|
|
/* HELP, TSNH since we assured it would not above? */
|
|
#ifdef INVARIANTS
|
|
panic("prepend failes HELP?");
|
|
#else
|
|
SCTP_PRINTF("prepend fails HELP?\n");
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
#endif
|
|
*bail = 1;
|
|
to_move = 0;
|
|
goto out_of;
|
|
}
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
|
|
chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_data_chunk));
|
|
} else {
|
|
sctp_snd_sb_alloc(stcb, sizeof(struct sctp_idata_chunk));
|
|
chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_idata_chunk));
|
|
}
|
|
chk->book_size_scale = 0;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->pad_inplace = 0;
|
|
chk->no_fr_allowed = 0;
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
if (rcv_flags & SCTP_DATA_UNORDERED) {
|
|
/* Just use 0. The receiver ignores the values. */
|
|
chk->rec.data.mid = 0;
|
|
} else {
|
|
chk->rec.data.mid = strq->next_mid_ordered;
|
|
if (rcv_flags & SCTP_DATA_LAST_FRAG) {
|
|
strq->next_mid_ordered++;
|
|
}
|
|
}
|
|
} else {
|
|
if (rcv_flags & SCTP_DATA_UNORDERED) {
|
|
chk->rec.data.mid = strq->next_mid_unordered;
|
|
if (rcv_flags & SCTP_DATA_LAST_FRAG) {
|
|
strq->next_mid_unordered++;
|
|
}
|
|
} else {
|
|
chk->rec.data.mid = strq->next_mid_ordered;
|
|
if (rcv_flags & SCTP_DATA_LAST_FRAG) {
|
|
strq->next_mid_ordered++;
|
|
}
|
|
}
|
|
}
|
|
chk->rec.data.sid = sp->sid;
|
|
chk->rec.data.ppid = sp->ppid;
|
|
chk->rec.data.context = sp->context;
|
|
chk->rec.data.doing_fast_retransmit = 0;
|
|
|
|
chk->rec.data.timetodrop = sp->ts;
|
|
chk->flags = sp->act_flags;
|
|
|
|
if (sp->net) {
|
|
chk->whoTo = sp->net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
} else
|
|
chk->whoTo = NULL;
|
|
|
|
if (sp->holds_key_ref) {
|
|
chk->auth_keyid = sp->auth_keyid;
|
|
sctp_auth_key_acquire(stcb, chk->auth_keyid);
|
|
chk->holds_key_ref = 1;
|
|
}
|
|
chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
|
|
sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
|
|
(uint32_t) (uintptr_t) stcb, sp->length,
|
|
(uint32_t) ((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
|
|
chk->rec.data.tsn);
|
|
}
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
dchkh = mtod(chk->data, struct sctp_data_chunk *);
|
|
} else {
|
|
ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
|
|
}
|
|
/*
|
|
* Put the rest of the things in place now. Size was done earlier in
|
|
* previous loop prior to padding.
|
|
*/
|
|
|
|
#ifdef SCTP_ASOCLOG_OF_TSNS
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
|
|
asoc->tsn_out_at = 0;
|
|
asoc->tsn_out_wrapped = 1;
|
|
}
|
|
asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
|
|
asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
|
|
asoc->tsn_out_at++;
|
|
#endif
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
dchkh->ch.chunk_type = SCTP_DATA;
|
|
dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
|
|
dchkh->dp.tsn = htonl(chk->rec.data.tsn);
|
|
dchkh->dp.sid = htons(strq->sid);
|
|
dchkh->dp.ssn = htons((uint16_t) chk->rec.data.mid);
|
|
dchkh->dp.ppid = chk->rec.data.ppid;
|
|
dchkh->ch.chunk_length = htons(chk->send_size);
|
|
} else {
|
|
ndchkh->ch.chunk_type = SCTP_IDATA;
|
|
ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
|
|
ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
|
|
ndchkh->dp.sid = htons(strq->sid);
|
|
ndchkh->dp.reserved = htons(0);
|
|
ndchkh->dp.mid = htonl(chk->rec.data.mid);
|
|
if (sp->fsn == 0)
|
|
ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
|
|
else
|
|
ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
|
|
sp->fsn++;
|
|
ndchkh->ch.chunk_length = htons(chk->send_size);
|
|
}
|
|
/* Now advance the chk->send_size by the actual pad needed. */
|
|
if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
|
|
/* need a pad */
|
|
struct mbuf *lm;
|
|
int pads;
|
|
|
|
pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
|
|
lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
|
|
if (lm != NULL) {
|
|
chk->last_mbuf = lm;
|
|
chk->pad_inplace = 1;
|
|
}
|
|
chk->send_size += pads;
|
|
}
|
|
if (PR_SCTP_ENABLED(chk->flags)) {
|
|
asoc->pr_sctp_cnt++;
|
|
}
|
|
if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
|
|
/* All done pull and kill the message */
|
|
if (sp->put_last_out == 0) {
|
|
SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
|
|
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
|
|
sp->sender_all_done,
|
|
sp->length,
|
|
sp->msg_is_complete,
|
|
sp->put_last_out,
|
|
send_lock_up);
|
|
}
|
|
if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
send_lock_up = 1;
|
|
}
|
|
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
|
|
TAILQ_REMOVE(&strq->outqueue, sp, next);
|
|
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
|
|
if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
|
|
(strq->chunks_on_queues == 0) &&
|
|
TAILQ_EMPTY(&strq->outqueue)) {
|
|
stcb->asoc.trigger_reset = 1;
|
|
}
|
|
if (sp->net) {
|
|
sctp_free_remote_addr(sp->net);
|
|
sp->net = NULL;
|
|
}
|
|
if (sp->data) {
|
|
sctp_m_freem(sp->data);
|
|
sp->data = NULL;
|
|
}
|
|
sctp_free_a_strmoq(stcb, sp, so_locked);
|
|
}
|
|
asoc->chunks_on_out_queue++;
|
|
strq->chunks_on_queues++;
|
|
TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
|
|
asoc->send_queue_cnt++;
|
|
out_of:
|
|
if (send_lock_up) {
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
}
|
|
return (to_move);
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_fill_outqueue(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_stream_out *strq;
|
|
int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
|
|
int giveup;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
asoc = &stcb->asoc;
|
|
switch (net->ro._l_addr.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
goal_mtu = net->mtu;
|
|
break;
|
|
}
|
|
/* Need an allowance for the data chunk header too */
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
goal_mtu -= sizeof(struct sctp_data_chunk);
|
|
} else {
|
|
goal_mtu -= sizeof(struct sctp_idata_chunk);
|
|
}
|
|
|
|
/* must make even word boundary */
|
|
goal_mtu &= 0xfffffffc;
|
|
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
|
|
while ((goal_mtu > 0) && strq) {
|
|
giveup = 0;
|
|
bail = 0;
|
|
moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point,
|
|
&giveup, eeor_mode, &bail, so_locked);
|
|
stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
|
|
|
|
if ((giveup) || bail) {
|
|
break;
|
|
}
|
|
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
|
|
if (strq == NULL) {
|
|
break;
|
|
}
|
|
total_moved += moved_how_much;
|
|
goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
|
|
goal_mtu &= 0xfffffffc;
|
|
}
|
|
if (bail)
|
|
*quit_now = 1;
|
|
|
|
stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
|
|
|
|
if (total_moved == 0) {
|
|
if ((stcb->asoc.sctp_cmt_on_off == 0) &&
|
|
(net == stcb->asoc.primary_destination)) {
|
|
/* ran dry for primary network net */
|
|
SCTP_STAT_INCR(sctps_primary_randry);
|
|
} else if (stcb->asoc.sctp_cmt_on_off > 0) {
|
|
/* ran dry with CMT on */
|
|
SCTP_STAT_INCR(sctps_cmt_randry);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
sctp_fix_ecn_echo(struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_stream_queue_pending *sp;
|
|
unsigned int i;
|
|
|
|
if (net == NULL) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
|
|
if (sp->net == net) {
|
|
sctp_free_remote_addr(sp->net);
|
|
sp->net = NULL;
|
|
}
|
|
}
|
|
}
|
|
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
|
|
if (chk->whoTo == net) {
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
sctp_med_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
int *num_out,
|
|
int *reason_code,
|
|
int control_only, int from_where,
|
|
struct timeval *now, int *now_filled, int frag_point, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
/**
|
|
* Ok this is the generic chunk service queue. we must do the
|
|
* following:
|
|
* - Service the stream queue that is next, moving any
|
|
* message (note I must get a complete message i.e. FIRST/MIDDLE and
|
|
* LAST to the out queue in one pass) and assigning TSN's. This
|
|
* only applys though if the peer does not support NDATA. For NDATA
|
|
* chunks its ok to not send the entire message ;-)
|
|
* - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
|
|
* fomulate and send the low level chunks. Making sure to combine
|
|
* any control in the control chunk queue also.
|
|
*/
|
|
struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
|
|
struct mbuf *outchain, *endoutchain;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
|
|
/* temp arrays for unlinking */
|
|
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
|
|
int no_fragmentflg, error;
|
|
unsigned int max_rwnd_per_dest, max_send_per_dest;
|
|
int one_chunk, hbflag, skip_data_for_this_net;
|
|
int asconf, cookie, no_out_cnt;
|
|
int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
|
|
unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
|
|
int tsns_sent = 0;
|
|
uint32_t auth_offset = 0;
|
|
struct sctp_auth_chunk *auth = NULL;
|
|
uint16_t auth_keyid;
|
|
int override_ok = 1;
|
|
int skip_fill_up = 0;
|
|
int data_auth_reqd = 0;
|
|
|
|
/*
|
|
* JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
|
|
* destination.
|
|
*/
|
|
int quit_now = 0;
|
|
|
|
*num_out = 0;
|
|
*reason_code = 0;
|
|
auth_keyid = stcb->asoc.authinfo.active_keyid;
|
|
if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
|
|
eeor_mode = 1;
|
|
} else {
|
|
eeor_mode = 0;
|
|
}
|
|
ctl_cnt = no_out_cnt = asconf = cookie = 0;
|
|
/*
|
|
* First lets prime the pump. For each destination, if there is room
|
|
* in the flight size, attempt to pull an MTU's worth out of the
|
|
* stream queues into the general send_queue
|
|
*/
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC2, 2);
|
|
#endif
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
hbflag = 0;
|
|
if (control_only)
|
|
no_data_chunks = 1;
|
|
else
|
|
no_data_chunks = 0;
|
|
|
|
/* Nothing to possible to send? */
|
|
if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
|
|
(asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
|
|
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
|
|
TAILQ_EMPTY(&asoc->send_queue) &&
|
|
sctp_is_there_unsent_data(stcb, so_locked) == 0) {
|
|
nothing_to_send:
|
|
*reason_code = 9;
|
|
return (0);
|
|
}
|
|
if (asoc->peers_rwnd == 0) {
|
|
/* No room in peers rwnd */
|
|
*reason_code = 1;
|
|
if (asoc->total_flight > 0) {
|
|
/* we are allowed one chunk in flight */
|
|
no_data_chunks = 1;
|
|
}
|
|
}
|
|
if (stcb->asoc.ecn_echo_cnt_onq) {
|
|
/* Record where a sack goes, if any */
|
|
if (no_data_chunks &&
|
|
(asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
|
|
/* Nothing but ECNe to send - we don't do that */
|
|
goto nothing_to_send;
|
|
}
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
|
|
sack_goes_to = chk->whoTo;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
|
|
if (stcb->sctp_socket)
|
|
max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
|
|
else
|
|
max_send_per_dest = 0;
|
|
if (no_data_chunks == 0) {
|
|
/* How many non-directed chunks are there? */
|
|
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
|
|
if (chk->whoTo == NULL) {
|
|
/*
|
|
* We already have non-directed chunks on
|
|
* the queue, no need to do a fill-up.
|
|
*/
|
|
skip_fill_up = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
}
|
|
if ((no_data_chunks == 0) &&
|
|
(skip_fill_up == 0) &&
|
|
(!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
/*
|
|
* This for loop we are in takes in each net, if
|
|
* its's got space in cwnd and has data sent to it
|
|
* (when CMT is off) then it calls
|
|
* sctp_fill_outqueue for the net. This gets data on
|
|
* the send queue for that network.
|
|
*
|
|
* In sctp_fill_outqueue TSN's are assigned and data
|
|
* is copied out of the stream buffers. Note mostly
|
|
* copy by reference (we hope).
|
|
*/
|
|
net->window_probe = 0;
|
|
if ((net != stcb->asoc.alternate) &&
|
|
((net->dest_state & SCTP_ADDR_PF) ||
|
|
(!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
|
|
(net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, net, 1,
|
|
SCTP_CWND_LOG_FILL_OUTQ_CALLED);
|
|
}
|
|
continue;
|
|
}
|
|
if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
|
|
(net->flight_size == 0)) {
|
|
(*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
|
|
}
|
|
if (net->flight_size >= net->cwnd) {
|
|
/* skip this network, no room - can't fill */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, net, 3,
|
|
SCTP_CWND_LOG_FILL_OUTQ_CALLED);
|
|
}
|
|
continue;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
|
|
}
|
|
sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
|
|
if (quit_now) {
|
|
/* memory alloc failure */
|
|
no_data_chunks = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* now service each destination and send out what we can for it */
|
|
/* Nothing to send? */
|
|
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
|
|
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
|
|
TAILQ_EMPTY(&asoc->send_queue)) {
|
|
*reason_code = 8;
|
|
return (0);
|
|
}
|
|
if (asoc->sctp_cmt_on_off > 0) {
|
|
/* get the last start point */
|
|
start_at = asoc->last_net_cmt_send_started;
|
|
if (start_at == NULL) {
|
|
/* null so to beginning */
|
|
start_at = TAILQ_FIRST(&asoc->nets);
|
|
} else {
|
|
start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
|
|
if (start_at == NULL) {
|
|
start_at = TAILQ_FIRST(&asoc->nets);
|
|
}
|
|
}
|
|
asoc->last_net_cmt_send_started = start_at;
|
|
} else {
|
|
start_at = TAILQ_FIRST(&asoc->nets);
|
|
}
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->whoTo == NULL) {
|
|
if (asoc->alternate) {
|
|
chk->whoTo = asoc->alternate;
|
|
} else {
|
|
chk->whoTo = asoc->primary_destination;
|
|
}
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
}
|
|
}
|
|
old_start_at = NULL;
|
|
again_one_more_time:
|
|
for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
|
|
/* how much can we send? */
|
|
/* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
|
|
if (old_start_at && (old_start_at == net)) {
|
|
/* through list ocmpletely. */
|
|
break;
|
|
}
|
|
tsns_sent = 0xa;
|
|
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
|
|
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
|
|
(net->flight_size >= net->cwnd)) {
|
|
/*
|
|
* Nothing on control or asconf and flight is full,
|
|
* we can skip even in the CMT case.
|
|
*/
|
|
continue;
|
|
}
|
|
bundle_at = 0;
|
|
endoutchain = outchain = NULL;
|
|
no_fragmentflg = 1;
|
|
one_chunk = 0;
|
|
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
|
|
skip_data_for_this_net = 1;
|
|
} else {
|
|
skip_data_for_this_net = 0;
|
|
}
|
|
switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
mtu = net->mtu - SCTP_MIN_OVERHEAD;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
mtu = net->mtu;
|
|
break;
|
|
}
|
|
mx_mtu = mtu;
|
|
to_out = 0;
|
|
if (mtu > asoc->peers_rwnd) {
|
|
if (asoc->total_flight > 0) {
|
|
/* We have a packet in flight somewhere */
|
|
r_mtu = asoc->peers_rwnd;
|
|
} else {
|
|
/* We are always allowed to send one MTU out */
|
|
one_chunk = 1;
|
|
r_mtu = mtu;
|
|
}
|
|
} else {
|
|
r_mtu = mtu;
|
|
}
|
|
error = 0;
|
|
/************************/
|
|
/* ASCONF transmission */
|
|
/************************/
|
|
/* Now first lets go through the asconf queue */
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
|
|
if (chk->rec.chunk_id.id != SCTP_ASCONF) {
|
|
continue;
|
|
}
|
|
if (chk->whoTo == NULL) {
|
|
if (asoc->alternate == NULL) {
|
|
if (asoc->primary_destination != net) {
|
|
break;
|
|
}
|
|
} else {
|
|
if (asoc->alternate != net) {
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
if (chk->whoTo != net) {
|
|
break;
|
|
}
|
|
}
|
|
if (chk->data == NULL) {
|
|
break;
|
|
}
|
|
if (chk->sent != SCTP_DATAGRAM_UNSENT &&
|
|
chk->sent != SCTP_DATAGRAM_RESEND) {
|
|
break;
|
|
}
|
|
/*
|
|
* if no AUTH is yet included and this chunk
|
|
* requires it, make sure to account for it. We
|
|
* don't apply the size until the AUTH chunk is
|
|
* actually added below in case there is no room for
|
|
* this chunk. NOTE: we overload the use of "omtu"
|
|
* here
|
|
*/
|
|
if ((auth == NULL) &&
|
|
sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
|
|
stcb->asoc.peer_auth_chunks)) {
|
|
omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
|
|
} else
|
|
omtu = 0;
|
|
/* Here we do NOT factor the r_mtu */
|
|
if ((chk->send_size < (int)(mtu - omtu)) ||
|
|
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
|
|
/*
|
|
* We probably should glom the mbuf chain
|
|
* from the chk->data for control but the
|
|
* problem is it becomes yet one more level
|
|
* of tracking to do if for some reason
|
|
* output fails. Then I have got to
|
|
* reconstruct the merged control chain.. el
|
|
* yucko.. for now we take the easy way and
|
|
* do the copy
|
|
*/
|
|
/*
|
|
* Add an AUTH chunk, if chunk requires it
|
|
* save the offset into the chain for AUTH
|
|
*/
|
|
if ((auth == NULL) &&
|
|
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
|
|
stcb->asoc.peer_auth_chunks))) {
|
|
outchain = sctp_add_auth_chunk(outchain,
|
|
&endoutchain,
|
|
&auth,
|
|
&auth_offset,
|
|
stcb,
|
|
chk->rec.chunk_id.id);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
}
|
|
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
|
|
(int)chk->rec.chunk_id.can_take_data,
|
|
chk->send_size, chk->copy_by_ref);
|
|
if (outchain == NULL) {
|
|
*reason_code = 8;
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
/* update our MTU size */
|
|
if (mtu > (chk->send_size + omtu))
|
|
mtu -= (chk->send_size + omtu);
|
|
else
|
|
mtu = 0;
|
|
to_out += (chk->send_size + omtu);
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
if (chk->rec.chunk_id.can_take_data)
|
|
chk->data = NULL;
|
|
/*
|
|
* set hb flag since we can use these for
|
|
* RTO
|
|
*/
|
|
hbflag = 1;
|
|
asconf = 1;
|
|
/*
|
|
* should sysctl this: don't bundle data
|
|
* with ASCONF since it requires AUTH
|
|
*/
|
|
no_data_chunks = 1;
|
|
chk->sent = SCTP_DATAGRAM_SENT;
|
|
if (chk->whoTo == NULL) {
|
|
chk->whoTo = net;
|
|
atomic_add_int(&net->ref_count, 1);
|
|
}
|
|
chk->snd_count++;
|
|
if (mtu == 0) {
|
|
/*
|
|
* Ok we are out of room but we can
|
|
* output without effecting the
|
|
* flight size since this little guy
|
|
* is a control only packet.
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
|
|
/*
|
|
* do NOT clear the asconf flag as
|
|
* it is used to do appropriate
|
|
* source address selection.
|
|
*/
|
|
if (*now_filled == 0) {
|
|
(void)SCTP_GETTIME_TIMEVAL(now);
|
|
*now_filled = 1;
|
|
}
|
|
net->last_sent_time = *now;
|
|
hbflag = 0;
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
(struct sockaddr *)&net->ro._l_addr,
|
|
outchain, auth_offset, auth,
|
|
stcb->asoc.authinfo.active_keyid,
|
|
no_fragmentflg, 0, asconf,
|
|
inp->sctp_lport, stcb->rport,
|
|
htonl(stcb->asoc.peer_vtag),
|
|
net->port, NULL,
|
|
0, 0,
|
|
so_locked))) {
|
|
/* error, we could not
|
|
* output */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
|
|
if (from_where == 0) {
|
|
SCTP_STAT_INCR(sctps_lowlevelerrusr);
|
|
}
|
|
if (error == ENOBUFS) {
|
|
asoc->ifp_had_enobuf = 1;
|
|
SCTP_STAT_INCR(sctps_lowlevelerr);
|
|
}
|
|
/* error, could not output */
|
|
if (error == EHOSTUNREACH) {
|
|
/*
|
|
* Destination went
|
|
* unreachable
|
|
* during this send
|
|
*/
|
|
sctp_move_chunks_from_net(stcb, net);
|
|
}
|
|
*reason_code = 7;
|
|
break;
|
|
} else {
|
|
asoc->ifp_had_enobuf = 0;
|
|
}
|
|
/*
|
|
* increase the number we sent, if a
|
|
* cookie is sent we don't tell them
|
|
* any was sent out.
|
|
*/
|
|
outchain = endoutchain = NULL;
|
|
auth = NULL;
|
|
auth_offset = 0;
|
|
if (!no_out_cnt)
|
|
*num_out += ctl_cnt;
|
|
/* recalc a clean slate and setup */
|
|
switch (net->ro._l_addr.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
mtu = net->mtu - SCTP_MIN_OVERHEAD;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
mtu = net->mtu;
|
|
break;
|
|
}
|
|
to_out = 0;
|
|
no_fragmentflg = 1;
|
|
}
|
|
}
|
|
}
|
|
if (error != 0) {
|
|
/* try next net */
|
|
continue;
|
|
}
|
|
/************************/
|
|
/* Control transmission */
|
|
/************************/
|
|
/* Now first lets go through the control queue */
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
|
|
if ((sack_goes_to) &&
|
|
(chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
|
|
(chk->whoTo != sack_goes_to)) {
|
|
/*
|
|
* if we have a sack in queue, and we are
|
|
* looking at an ecn echo that is NOT queued
|
|
* to where the sack is going..
|
|
*/
|
|
if (chk->whoTo == net) {
|
|
/* Don't transmit it to where its
|
|
* going (current net) */
|
|
continue;
|
|
} else if (sack_goes_to == net) {
|
|
/* But do transmit it to this
|
|
* address */
|
|
goto skip_net_check;
|
|
}
|
|
}
|
|
if (chk->whoTo == NULL) {
|
|
if (asoc->alternate == NULL) {
|
|
if (asoc->primary_destination != net) {
|
|
continue;
|
|
}
|
|
} else {
|
|
if (asoc->alternate != net) {
|
|
continue;
|
|
}
|
|
}
|
|
} else {
|
|
if (chk->whoTo != net) {
|
|
continue;
|
|
}
|
|
}
|
|
skip_net_check:
|
|
if (chk->data == NULL) {
|
|
continue;
|
|
}
|
|
if (chk->sent != SCTP_DATAGRAM_UNSENT) {
|
|
/*
|
|
* It must be unsent. Cookies and ASCONF's
|
|
* hang around but there timers will force
|
|
* when marked for resend.
|
|
*/
|
|
continue;
|
|
}
|
|
/*
|
|
* if no AUTH is yet included and this chunk
|
|
* requires it, make sure to account for it. We
|
|
* don't apply the size until the AUTH chunk is
|
|
* actually added below in case there is no room for
|
|
* this chunk. NOTE: we overload the use of "omtu"
|
|
* here
|
|
*/
|
|
if ((auth == NULL) &&
|
|
sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
|
|
stcb->asoc.peer_auth_chunks)) {
|
|
omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
|
|
} else
|
|
omtu = 0;
|
|
/* Here we do NOT factor the r_mtu */
|
|
if ((chk->send_size <= (int)(mtu - omtu)) ||
|
|
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
|
|
/*
|
|
* We probably should glom the mbuf chain
|
|
* from the chk->data for control but the
|
|
* problem is it becomes yet one more level
|
|
* of tracking to do if for some reason
|
|
* output fails. Then I have got to
|
|
* reconstruct the merged control chain.. el
|
|
* yucko.. for now we take the easy way and
|
|
* do the copy
|
|
*/
|
|
/*
|
|
* Add an AUTH chunk, if chunk requires it
|
|
* save the offset into the chain for AUTH
|
|
*/
|
|
if ((auth == NULL) &&
|
|
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
|
|
stcb->asoc.peer_auth_chunks))) {
|
|
outchain = sctp_add_auth_chunk(outchain,
|
|
&endoutchain,
|
|
&auth,
|
|
&auth_offset,
|
|
stcb,
|
|
chk->rec.chunk_id.id);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
}
|
|
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
|
|
(int)chk->rec.chunk_id.can_take_data,
|
|
chk->send_size, chk->copy_by_ref);
|
|
if (outchain == NULL) {
|
|
*reason_code = 8;
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
/* update our MTU size */
|
|
if (mtu > (chk->send_size + omtu))
|
|
mtu -= (chk->send_size + omtu);
|
|
else
|
|
mtu = 0;
|
|
to_out += (chk->send_size + omtu);
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
if (chk->rec.chunk_id.can_take_data)
|
|
chk->data = NULL;
|
|
/* Mark things to be removed, if needed */
|
|
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
|
|
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
|
|
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
|
|
(chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
|
|
(chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
|
|
(chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
|
|
(chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
|
|
if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
|
|
hbflag = 1;
|
|
}
|
|
/* remove these chunks at the end */
|
|
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
|
|
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
|
|
/* turn off the timer */
|
|
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
inp, stcb, net,
|
|
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
|
|
}
|
|
}
|
|
ctl_cnt++;
|
|
} else {
|
|
/*
|
|
* Other chunks, since they have
|
|
* timers running (i.e. COOKIE) we
|
|
* just "trust" that it gets sent or
|
|
* retransmitted.
|
|
*/
|
|
ctl_cnt++;
|
|
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
|
|
cookie = 1;
|
|
no_out_cnt = 1;
|
|
} else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
|
|
/*
|
|
* Increment ecne send count
|
|
* here this means we may be
|
|
* over-zealous in our
|
|
* counting if the send
|
|
* fails, but its the best
|
|
* place to do it (we used
|
|
* to do it in the queue of
|
|
* the chunk, but that did
|
|
* not tell how many times
|
|
* it was sent.
|
|
*/
|
|
SCTP_STAT_INCR(sctps_sendecne);
|
|
}
|
|
chk->sent = SCTP_DATAGRAM_SENT;
|
|
if (chk->whoTo == NULL) {
|
|
chk->whoTo = net;
|
|
atomic_add_int(&net->ref_count, 1);
|
|
}
|
|
chk->snd_count++;
|
|
}
|
|
if (mtu == 0) {
|
|
/*
|
|
* Ok we are out of room but we can
|
|
* output without effecting the
|
|
* flight size since this little guy
|
|
* is a control only packet.
|
|
*/
|
|
if (asconf) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
|
|
/*
|
|
* do NOT clear the asconf
|
|
* flag as it is used to do
|
|
* appropriate source
|
|
* address selection.
|
|
*/
|
|
}
|
|
if (cookie) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
|
|
cookie = 0;
|
|
}
|
|
/* Only HB or ASCONF advances time */
|
|
if (hbflag) {
|
|
if (*now_filled == 0) {
|
|
(void)SCTP_GETTIME_TIMEVAL(now);
|
|
*now_filled = 1;
|
|
}
|
|
net->last_sent_time = *now;
|
|
hbflag = 0;
|
|
}
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
(struct sockaddr *)&net->ro._l_addr,
|
|
outchain,
|
|
auth_offset, auth,
|
|
stcb->asoc.authinfo.active_keyid,
|
|
no_fragmentflg, 0, asconf,
|
|
inp->sctp_lport, stcb->rport,
|
|
htonl(stcb->asoc.peer_vtag),
|
|
net->port, NULL,
|
|
0, 0,
|
|
so_locked))) {
|
|
/* error, we could not
|
|
* output */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
|
|
if (from_where == 0) {
|
|
SCTP_STAT_INCR(sctps_lowlevelerrusr);
|
|
}
|
|
if (error == ENOBUFS) {
|
|
asoc->ifp_had_enobuf = 1;
|
|
SCTP_STAT_INCR(sctps_lowlevelerr);
|
|
}
|
|
if (error == EHOSTUNREACH) {
|
|
/*
|
|
* Destination went
|
|
* unreachable
|
|
* during this send
|
|
*/
|
|
sctp_move_chunks_from_net(stcb, net);
|
|
}
|
|
*reason_code = 7;
|
|
break;
|
|
} else {
|
|
asoc->ifp_had_enobuf = 0;
|
|
}
|
|
/*
|
|
* increase the number we sent, if a
|
|
* cookie is sent we don't tell them
|
|
* any was sent out.
|
|
*/
|
|
outchain = endoutchain = NULL;
|
|
auth = NULL;
|
|
auth_offset = 0;
|
|
if (!no_out_cnt)
|
|
*num_out += ctl_cnt;
|
|
/* recalc a clean slate and setup */
|
|
switch (net->ro._l_addr.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
mtu = net->mtu - SCTP_MIN_OVERHEAD;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
mtu = net->mtu;
|
|
break;
|
|
}
|
|
to_out = 0;
|
|
no_fragmentflg = 1;
|
|
}
|
|
}
|
|
}
|
|
if (error != 0) {
|
|
/* try next net */
|
|
continue;
|
|
}
|
|
/* JRI: if dest is in PF state, do not send data to it */
|
|
if ((asoc->sctp_cmt_on_off > 0) &&
|
|
(net != stcb->asoc.alternate) &&
|
|
(net->dest_state & SCTP_ADDR_PF)) {
|
|
goto no_data_fill;
|
|
}
|
|
if (net->flight_size >= net->cwnd) {
|
|
goto no_data_fill;
|
|
}
|
|
if ((asoc->sctp_cmt_on_off > 0) &&
|
|
(SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
|
|
(net->flight_size > max_rwnd_per_dest)) {
|
|
goto no_data_fill;
|
|
}
|
|
/*
|
|
* We need a specific accounting for the usage of the send
|
|
* buffer. We also need to check the number of messages per
|
|
* net. For now, this is better than nothing and it disabled
|
|
* by default...
|
|
*/
|
|
if ((asoc->sctp_cmt_on_off > 0) &&
|
|
(SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
|
|
(max_send_per_dest > 0) &&
|
|
(net->flight_size > max_send_per_dest)) {
|
|
goto no_data_fill;
|
|
}
|
|
/*********************/
|
|
/* Data transmission */
|
|
/*********************/
|
|
/*
|
|
* if AUTH for DATA is required and no AUTH has been added
|
|
* yet, account for this in the mtu now... if no data can be
|
|
* bundled, this adjustment won't matter anyways since the
|
|
* packet will be going out...
|
|
*/
|
|
data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
|
|
stcb->asoc.peer_auth_chunks);
|
|
if (data_auth_reqd && (auth == NULL)) {
|
|
mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
|
|
}
|
|
/* now lets add any data within the MTU constraints */
|
|
switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (net->mtu > SCTP_MIN_V4_OVERHEAD)
|
|
omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
|
|
else
|
|
omtu = 0;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (net->mtu > SCTP_MIN_OVERHEAD)
|
|
omtu = net->mtu - SCTP_MIN_OVERHEAD;
|
|
else
|
|
omtu = 0;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
omtu = 0;
|
|
break;
|
|
}
|
|
if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
|
|
(skip_data_for_this_net == 0)) ||
|
|
(cookie)) {
|
|
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
|
|
if (no_data_chunks) {
|
|
/* let only control go out */
|
|
*reason_code = 1;
|
|
break;
|
|
}
|
|
if (net->flight_size >= net->cwnd) {
|
|
/* skip this net, no room for data */
|
|
*reason_code = 2;
|
|
break;
|
|
}
|
|
if ((chk->whoTo != NULL) &&
|
|
(chk->whoTo != net)) {
|
|
/* Don't send the chunk on this net */
|
|
continue;
|
|
}
|
|
if (asoc->sctp_cmt_on_off == 0) {
|
|
if ((asoc->alternate) &&
|
|
(asoc->alternate != net) &&
|
|
(chk->whoTo == NULL)) {
|
|
continue;
|
|
} else if ((net != asoc->primary_destination) &&
|
|
(asoc->alternate == NULL) &&
|
|
(chk->whoTo == NULL)) {
|
|
continue;
|
|
}
|
|
}
|
|
if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
|
|
/*-
|
|
* strange, we have a chunk that is
|
|
* to big for its destination and
|
|
* yet no fragment ok flag.
|
|
* Something went wrong when the
|
|
* PMTU changed...we did not mark
|
|
* this chunk for some reason?? I
|
|
* will fix it here by letting IP
|
|
* fragment it for now and printing
|
|
* a warning. This really should not
|
|
* happen ...
|
|
*/
|
|
SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
|
|
chk->send_size, mtu);
|
|
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
|
|
((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
struct sctp_data_chunk *dchkh;
|
|
|
|
dchkh = mtod(chk->data, struct sctp_data_chunk *);
|
|
dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
|
|
}
|
|
if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
|
|
((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
|
|
/* ok we will add this one */
|
|
|
|
/*
|
|
* Add an AUTH chunk, if chunk
|
|
* requires it, save the offset into
|
|
* the chain for AUTH
|
|
*/
|
|
if (data_auth_reqd) {
|
|
if (auth == NULL) {
|
|
outchain = sctp_add_auth_chunk(outchain,
|
|
&endoutchain,
|
|
&auth,
|
|
&auth_offset,
|
|
stcb,
|
|
SCTP_DATA);
|
|
auth_keyid = chk->auth_keyid;
|
|
override_ok = 0;
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
} else if (override_ok) {
|
|
/* use this data's
|
|
* keyid */
|
|
auth_keyid = chk->auth_keyid;
|
|
override_ok = 0;
|
|
} else if (auth_keyid != chk->auth_keyid) {
|
|
/* different keyid,
|
|
* so done bundling */
|
|
break;
|
|
}
|
|
}
|
|
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
|
|
chk->send_size, chk->copy_by_ref);
|
|
if (outchain == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
|
|
if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
}
|
|
*reason_code = 3;
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
/* upate our MTU size */
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
/* unsigned subtraction of mtu */
|
|
if (mtu > chk->send_size)
|
|
mtu -= chk->send_size;
|
|
else
|
|
mtu = 0;
|
|
/* unsigned subtraction of r_mtu */
|
|
if (r_mtu > chk->send_size)
|
|
r_mtu -= chk->send_size;
|
|
else
|
|
r_mtu = 0;
|
|
|
|
to_out += chk->send_size;
|
|
if ((to_out > mx_mtu) && no_fragmentflg) {
|
|
#ifdef INVARIANTS
|
|
panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
|
|
#else
|
|
SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
|
|
mx_mtu, to_out);
|
|
#endif
|
|
}
|
|
chk->window_probe = 0;
|
|
data_list[bundle_at++] = chk;
|
|
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
|
|
break;
|
|
}
|
|
if (chk->sent == SCTP_DATAGRAM_UNSENT) {
|
|
if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
|
|
} else {
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
|
|
}
|
|
if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
|
|
((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
|
|
/*
|
|
* Count number of
|
|
* user msg's that
|
|
* were fragmented
|
|
* we do this by
|
|
* counting when we
|
|
* see a LAST
|
|
* fragment only.
|
|
*/
|
|
SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
|
|
}
|
|
if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
|
|
if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
|
|
data_list[0]->window_probe = 1;
|
|
net->window_probe = 1;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* Must be sent in order of the
|
|
* TSN's (on a network)
|
|
*/
|
|
break;
|
|
}
|
|
} /* for (chunk gather loop for this net) */
|
|
} /* if asoc.state OPEN */ no_data_fill:
|
|
/* Is there something to send for this destination? */
|
|
if (outchain) {
|
|
/* We may need to start a control timer or two */
|
|
if (asconf) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
|
|
stcb, net);
|
|
/*
|
|
* do NOT clear the asconf flag as it is
|
|
* used to do appropriate source address
|
|
* selection.
|
|
*/
|
|
}
|
|
if (cookie) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
|
|
cookie = 0;
|
|
}
|
|
/* must start a send timer if data is being sent */
|
|
if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
|
|
/*
|
|
* no timer running on this destination
|
|
* restart it.
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
}
|
|
if (bundle_at || hbflag) {
|
|
/* For data/asconf and hb set time */
|
|
if (*now_filled == 0) {
|
|
(void)SCTP_GETTIME_TIMEVAL(now);
|
|
*now_filled = 1;
|
|
}
|
|
net->last_sent_time = *now;
|
|
}
|
|
/* Now send it, if there is anything to send :> */
|
|
if ((error = sctp_lowlevel_chunk_output(inp,
|
|
stcb,
|
|
net,
|
|
(struct sockaddr *)&net->ro._l_addr,
|
|
outchain,
|
|
auth_offset,
|
|
auth,
|
|
auth_keyid,
|
|
no_fragmentflg,
|
|
bundle_at,
|
|
asconf,
|
|
inp->sctp_lport, stcb->rport,
|
|
htonl(stcb->asoc.peer_vtag),
|
|
net->port, NULL,
|
|
0, 0,
|
|
so_locked))) {
|
|
/* error, we could not output */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
|
|
if (from_where == 0) {
|
|
SCTP_STAT_INCR(sctps_lowlevelerrusr);
|
|
}
|
|
if (error == ENOBUFS) {
|
|
SCTP_STAT_INCR(sctps_lowlevelerr);
|
|
asoc->ifp_had_enobuf = 1;
|
|
}
|
|
if (error == EHOSTUNREACH) {
|
|
/*
|
|
* Destination went unreachable
|
|
* during this send
|
|
*/
|
|
sctp_move_chunks_from_net(stcb, net);
|
|
}
|
|
*reason_code = 6;
|
|
/*-
|
|
* I add this line to be paranoid. As far as
|
|
* I can tell the continue, takes us back to
|
|
* the top of the for, but just to make sure
|
|
* I will reset these again here.
|
|
*/
|
|
ctl_cnt = bundle_at = 0;
|
|
continue; /* This takes us back to the
|
|
* for() for the nets. */
|
|
} else {
|
|
asoc->ifp_had_enobuf = 0;
|
|
}
|
|
endoutchain = NULL;
|
|
auth = NULL;
|
|
auth_offset = 0;
|
|
if (!no_out_cnt) {
|
|
*num_out += (ctl_cnt + bundle_at);
|
|
}
|
|
if (bundle_at) {
|
|
/* setup for a RTO measurement */
|
|
tsns_sent = data_list[0]->rec.data.tsn;
|
|
/* fill time if not already filled */
|
|
if (*now_filled == 0) {
|
|
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
|
|
*now_filled = 1;
|
|
*now = asoc->time_last_sent;
|
|
} else {
|
|
asoc->time_last_sent = *now;
|
|
}
|
|
if (net->rto_needed) {
|
|
data_list[0]->do_rtt = 1;
|
|
net->rto_needed = 0;
|
|
}
|
|
SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
|
|
sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
|
|
}
|
|
if (one_chunk) {
|
|
break;
|
|
}
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
|
|
}
|
|
}
|
|
if (old_start_at == NULL) {
|
|
old_start_at = start_at;
|
|
start_at = TAILQ_FIRST(&asoc->nets);
|
|
if (old_start_at)
|
|
goto again_one_more_time;
|
|
}
|
|
/*
|
|
* At the end there should be no NON timed chunks hanging on this
|
|
* queue.
|
|
*/
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
|
|
}
|
|
if ((*num_out == 0) && (*reason_code == 0)) {
|
|
*reason_code = 4;
|
|
} else {
|
|
*reason_code = 5;
|
|
}
|
|
sctp_clean_up_ctl(stcb, asoc, so_locked);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
|
|
{
|
|
/*-
|
|
* Prepend a OPERATIONAL_ERROR chunk header and put on the end of
|
|
* the control chunk queue.
|
|
*/
|
|
struct sctp_chunkhdr *hdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct mbuf *mat, *last_mbuf;
|
|
uint32_t chunk_length;
|
|
uint16_t padding_length;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
|
|
if (op_err == NULL) {
|
|
return;
|
|
}
|
|
last_mbuf = NULL;
|
|
chunk_length = 0;
|
|
for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
|
|
chunk_length += SCTP_BUF_LEN(mat);
|
|
if (SCTP_BUF_NEXT(mat) == NULL) {
|
|
last_mbuf = mat;
|
|
}
|
|
}
|
|
if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
|
|
sctp_m_freem(op_err);
|
|
return;
|
|
}
|
|
padding_length = chunk_length % 4;
|
|
if (padding_length != 0) {
|
|
padding_length = 4 - padding_length;
|
|
}
|
|
if (padding_length != 0) {
|
|
if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
|
|
sctp_m_freem(op_err);
|
|
return;
|
|
}
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(op_err);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->send_size = (uint16_t) chunk_length;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = op_err;
|
|
chk->whoTo = NULL;
|
|
chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
hdr = mtod(op_err, struct sctp_chunkhdr *);
|
|
hdr->chunk_type = SCTP_OPERATION_ERROR;
|
|
hdr->chunk_flags = 0;
|
|
hdr->chunk_length = htons(chk->send_size);
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
int
|
|
sctp_send_cookie_echo(struct mbuf *m,
|
|
int offset,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
/*-
|
|
* pull out the cookie and put it at the front of the control chunk
|
|
* queue.
|
|
*/
|
|
int at;
|
|
struct mbuf *cookie;
|
|
struct sctp_paramhdr parm, *phdr;
|
|
struct sctp_chunkhdr *hdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
uint16_t ptype, plen;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
/* First find the cookie in the param area */
|
|
cookie = NULL;
|
|
at = offset + sizeof(struct sctp_init_chunk);
|
|
for (;;) {
|
|
phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
|
|
if (phdr == NULL) {
|
|
return (-3);
|
|
}
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
if (ptype == SCTP_STATE_COOKIE) {
|
|
int pad;
|
|
|
|
/* found the cookie */
|
|
if ((pad = (plen % 4))) {
|
|
plen += 4 - pad;
|
|
}
|
|
cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
|
|
if (cookie == NULL) {
|
|
/* No memory */
|
|
return (-2);
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
at += SCTP_SIZE32(plen);
|
|
}
|
|
/* ok, we got the cookie lets change it into a cookie echo chunk */
|
|
/* first the change from param to cookie */
|
|
hdr = mtod(cookie, struct sctp_chunkhdr *);
|
|
hdr->chunk_type = SCTP_COOKIE_ECHO;
|
|
hdr->chunk_flags = 0;
|
|
/* get the chunk stuff now and place it in the FRONT of the queue */
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(cookie);
|
|
return (-5);
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
|
|
chk->send_size = plen;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = cookie;
|
|
chk->whoTo = net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
|
|
struct mbuf *m,
|
|
int offset,
|
|
int chk_length,
|
|
struct sctp_nets *net)
|
|
{
|
|
/*
|
|
* take a HB request and make it into a HB ack and send it.
|
|
*/
|
|
struct mbuf *outchain;
|
|
struct sctp_chunkhdr *chdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
|
|
if (net == NULL)
|
|
/* must have a net pointer */
|
|
return;
|
|
|
|
outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
|
|
if (outchain == NULL) {
|
|
/* gak out of memory */
|
|
return;
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
chdr = mtod(outchain, struct sctp_chunkhdr *);
|
|
chdr->chunk_type = SCTP_HEARTBEAT_ACK;
|
|
chdr->chunk_flags = 0;
|
|
if (chk_length % 4) {
|
|
/* need pad */
|
|
uint32_t cpthis = 0;
|
|
int padlen;
|
|
|
|
padlen = 4 - (chk_length % 4);
|
|
m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(outchain);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
chk->send_size = chk_length;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = outchain;
|
|
chk->whoTo = net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
void
|
|
sctp_send_cookie_ack(struct sctp_tcb *stcb)
|
|
{
|
|
/* formulate and queue a cookie-ack back to sender */
|
|
struct mbuf *cookie_ack;
|
|
struct sctp_chunkhdr *hdr;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
|
|
cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (cookie_ack == NULL) {
|
|
/* no mbuf's */
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(cookie_ack);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
chk->send_size = sizeof(struct sctp_chunkhdr);
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = cookie_ack;
|
|
if (chk->asoc->last_control_chunk_from != NULL) {
|
|
chk->whoTo = chk->asoc->last_control_chunk_from;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
} else {
|
|
chk->whoTo = NULL;
|
|
}
|
|
hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
|
|
hdr->chunk_type = SCTP_COOKIE_ACK;
|
|
hdr->chunk_flags = 0;
|
|
hdr->chunk_length = htons(chk->send_size);
|
|
SCTP_BUF_LEN(cookie_ack) = chk->send_size;
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return;
|
|
}
|
|
|
|
|
|
void
|
|
sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/* formulate and queue a SHUTDOWN-ACK back to the sender */
|
|
struct mbuf *m_shutdown_ack;
|
|
struct sctp_shutdown_ack_chunk *ack_cp;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (m_shutdown_ack == NULL) {
|
|
/* no mbuf's */
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(m_shutdown_ack);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
chk->send_size = sizeof(struct sctp_chunkhdr);
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = m_shutdown_ack;
|
|
chk->whoTo = net;
|
|
if (chk->whoTo) {
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
}
|
|
ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
|
|
ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
|
|
ack_cp->ch.chunk_flags = 0;
|
|
ack_cp->ch.chunk_length = htons(chk->send_size);
|
|
SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/* formulate and queue a SHUTDOWN to the sender */
|
|
struct mbuf *m_shutdown;
|
|
struct sctp_shutdown_chunk *shutdown_cp;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
|
|
/* We already have a SHUTDOWN queued. Reuse it. */
|
|
if (chk->whoTo) {
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = NULL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (chk == NULL) {
|
|
m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (m_shutdown == NULL) {
|
|
/* no mbuf's */
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(m_shutdown);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_SHUTDOWN;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
chk->send_size = sizeof(struct sctp_shutdown_chunk);
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = m_shutdown;
|
|
chk->whoTo = net;
|
|
if (chk->whoTo) {
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
}
|
|
shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
|
|
shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
|
|
shutdown_cp->ch.chunk_flags = 0;
|
|
shutdown_cp->ch.chunk_length = htons(chk->send_size);
|
|
shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
|
|
SCTP_BUF_LEN(m_shutdown) = chk->send_size;
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
} else {
|
|
TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
chk->whoTo = net;
|
|
if (chk->whoTo) {
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
}
|
|
shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
|
|
shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
}
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
|
|
{
|
|
/*
|
|
* formulate and queue an ASCONF to the peer. ASCONF parameters
|
|
* should be queued on the assoc queue.
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
struct mbuf *m_asconf;
|
|
int len;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
|
|
if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
|
|
(!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
|
|
/* can't send a new one if there is one in flight already */
|
|
return;
|
|
}
|
|
/* compose an ASCONF chunk, maximum length is PMTU */
|
|
m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
|
|
if (m_asconf == NULL) {
|
|
return;
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
sctp_m_freem(m_asconf);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_ASCONF;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
|
|
chk->data = m_asconf;
|
|
chk->send_size = len;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->whoTo = net;
|
|
if (chk->whoTo) {
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
}
|
|
TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_asconf_ack(struct sctp_tcb *stcb)
|
|
{
|
|
/*
|
|
* formulate and queue a asconf-ack back to sender. the asconf-ack
|
|
* must be stored in the tcb.
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_asconf_ack *ack, *latest_ack;
|
|
struct mbuf *m_ack;
|
|
struct sctp_nets *net = NULL;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
/* Get the latest ASCONF-ACK */
|
|
latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
|
|
if (latest_ack == NULL) {
|
|
return;
|
|
}
|
|
if (latest_ack->last_sent_to != NULL &&
|
|
latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
|
|
/* we're doing a retransmission */
|
|
net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
|
|
if (net == NULL) {
|
|
/* no alternate */
|
|
if (stcb->asoc.last_control_chunk_from == NULL) {
|
|
if (stcb->asoc.alternate) {
|
|
net = stcb->asoc.alternate;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
} else {
|
|
net = stcb->asoc.last_control_chunk_from;
|
|
}
|
|
}
|
|
} else {
|
|
/* normal case */
|
|
if (stcb->asoc.last_control_chunk_from == NULL) {
|
|
if (stcb->asoc.alternate) {
|
|
net = stcb->asoc.alternate;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
} else {
|
|
net = stcb->asoc.last_control_chunk_from;
|
|
}
|
|
}
|
|
latest_ack->last_sent_to = net;
|
|
|
|
TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
|
|
if (ack->data == NULL) {
|
|
continue;
|
|
}
|
|
/* copy the asconf_ack */
|
|
m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
|
|
if (m_ack == NULL) {
|
|
/* couldn't copy it */
|
|
return;
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
/* no memory */
|
|
if (m_ack)
|
|
sctp_m_freem(m_ack);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
|
|
chk->whoTo = net;
|
|
if (chk->whoTo) {
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
}
|
|
chk->data = m_ack;
|
|
chk->send_size = ack->len;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
|
|
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
|
|
chk->asoc->ctrl_queue_cnt++;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_chunk_retransmission(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
/*-
|
|
* send out one MTU of retransmission. If fast_retransmit is
|
|
* happening we ignore the cwnd. Otherwise we obey the cwnd and
|
|
* rwnd. For a Cookie or Asconf in the control chunk queue we
|
|
* retransmit them by themselves.
|
|
*
|
|
* For data chunks we will pick out the lowest TSN's in the sent_queue
|
|
* marked for resend and bundle them all together (up to a MTU of
|
|
* destination). The address to send to should have been
|
|
* selected/changed where the retransmission was marked (i.e. in FR
|
|
* or t3-timeout routines).
|
|
*/
|
|
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
|
|
struct sctp_tmit_chunk *chk, *fwd;
|
|
struct mbuf *m, *endofchain;
|
|
struct sctp_nets *net = NULL;
|
|
uint32_t tsns_sent = 0;
|
|
int no_fragmentflg, bundle_at, cnt_thru;
|
|
unsigned int mtu;
|
|
int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
|
|
struct sctp_auth_chunk *auth = NULL;
|
|
uint32_t auth_offset = 0;
|
|
uint16_t auth_keyid;
|
|
int override_ok = 1;
|
|
int data_auth_reqd = 0;
|
|
uint32_t dmtu = 0;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
tmr_started = ctl_cnt = bundle_at = error = 0;
|
|
no_fragmentflg = 1;
|
|
fwd_tsn = 0;
|
|
*cnt_out = 0;
|
|
fwd = NULL;
|
|
endofchain = m = NULL;
|
|
auth_keyid = stcb->asoc.authinfo.active_keyid;
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC3, 1);
|
|
#endif
|
|
if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
|
|
(TAILQ_EMPTY(&asoc->control_send_queue))) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
|
|
asoc->sent_queue_retran_cnt);
|
|
asoc->sent_queue_cnt = 0;
|
|
asoc->sent_queue_cnt_removeable = 0;
|
|
/* send back 0/0 so we enter normal transmission */
|
|
*cnt_out = 0;
|
|
return (0);
|
|
}
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
|
|
(chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
|
|
(chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
|
|
if (chk->sent != SCTP_DATAGRAM_RESEND) {
|
|
continue;
|
|
}
|
|
if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
|
|
if (chk != asoc->str_reset) {
|
|
/*
|
|
* not eligible for retran if its
|
|
* not ours
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
ctl_cnt++;
|
|
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
|
|
fwd_tsn = 1;
|
|
}
|
|
/*
|
|
* Add an AUTH chunk, if chunk requires it save the
|
|
* offset into the chain for AUTH
|
|
*/
|
|
if ((auth == NULL) &&
|
|
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
|
|
stcb->asoc.peer_auth_chunks))) {
|
|
m = sctp_add_auth_chunk(m, &endofchain,
|
|
&auth, &auth_offset,
|
|
stcb,
|
|
chk->rec.chunk_id.id);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
}
|
|
m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
|
|
break;
|
|
}
|
|
}
|
|
one_chunk = 0;
|
|
cnt_thru = 0;
|
|
/* do we have control chunks to retransmit? */
|
|
if (m != NULL) {
|
|
/* Start a timer no matter if we succeed or fail */
|
|
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
|
|
} else if (chk->rec.chunk_id.id == SCTP_ASCONF)
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
|
|
chk->snd_count++; /* update our count */
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
|
|
(struct sockaddr *)&chk->whoTo->ro._l_addr, m,
|
|
auth_offset, auth, stcb->asoc.authinfo.active_keyid,
|
|
no_fragmentflg, 0, 0,
|
|
inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
|
|
chk->whoTo->port, NULL,
|
|
0, 0,
|
|
so_locked))) {
|
|
SCTP_STAT_INCR(sctps_lowlevelerr);
|
|
return (error);
|
|
}
|
|
endofchain = NULL;
|
|
auth = NULL;
|
|
auth_offset = 0;
|
|
/*
|
|
* We don't want to mark the net->sent time here since this
|
|
* we use this for HB and retrans cannot measure RTT
|
|
*/
|
|
/* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
|
|
*cnt_out += 1;
|
|
chk->sent = SCTP_DATAGRAM_SENT;
|
|
sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
|
|
if (fwd_tsn == 0) {
|
|
return (0);
|
|
} else {
|
|
/* Clean up the fwd-tsn list */
|
|
sctp_clean_up_ctl(stcb, asoc, so_locked);
|
|
return (0);
|
|
}
|
|
}
|
|
/*
|
|
* Ok, it is just data retransmission we need to do or that and a
|
|
* fwd-tsn with it all.
|
|
*/
|
|
if (TAILQ_EMPTY(&asoc->sent_queue)) {
|
|
return (SCTP_RETRAN_DONE);
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
|
|
/* not yet open, resend the cookie and that is it */
|
|
return (1);
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(20, inp, stcb, NULL);
|
|
#endif
|
|
data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
|
|
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
|
|
if (chk->sent != SCTP_DATAGRAM_RESEND) {
|
|
/* No, not sent to this net or not ready for rtx */
|
|
continue;
|
|
}
|
|
if (chk->data == NULL) {
|
|
SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
|
|
chk->rec.data.tsn, chk->snd_count, chk->sent);
|
|
continue;
|
|
}
|
|
if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
|
|
(chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
|
|
struct mbuf *op_err;
|
|
char msg[SCTP_DIAG_INFO_LEN];
|
|
|
|
snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
|
|
chk->rec.data.tsn, chk->snd_count);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
|
|
so_locked);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (SCTP_RETRAN_EXIT);
|
|
}
|
|
/* pick up the net */
|
|
net = chk->whoTo;
|
|
switch (net->ro._l_addr.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
mtu = net->mtu - SCTP_MIN_OVERHEAD;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* TSNH */
|
|
mtu = net->mtu;
|
|
break;
|
|
}
|
|
|
|
if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
|
|
/* No room in peers rwnd */
|
|
uint32_t tsn;
|
|
|
|
tsn = asoc->last_acked_seq + 1;
|
|
if (tsn == chk->rec.data.tsn) {
|
|
/*
|
|
* we make a special exception for this
|
|
* case. The peer has no rwnd but is missing
|
|
* the lowest chunk.. which is probably what
|
|
* is holding up the rwnd.
|
|
*/
|
|
goto one_chunk_around;
|
|
}
|
|
return (1);
|
|
}
|
|
one_chunk_around:
|
|
if (asoc->peers_rwnd < mtu) {
|
|
one_chunk = 1;
|
|
if ((asoc->peers_rwnd == 0) &&
|
|
(asoc->total_flight == 0)) {
|
|
chk->window_probe = 1;
|
|
chk->whoTo->window_probe = 1;
|
|
}
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC3, 2);
|
|
#endif
|
|
bundle_at = 0;
|
|
m = NULL;
|
|
net->fast_retran_ip = 0;
|
|
if (chk->rec.data.doing_fast_retransmit == 0) {
|
|
/*
|
|
* if no FR in progress skip destination that have
|
|
* flight_size > cwnd.
|
|
*/
|
|
if (net->flight_size >= net->cwnd) {
|
|
continue;
|
|
}
|
|
} else {
|
|
/*
|
|
* Mark the destination net to have FR recovery
|
|
* limits put on it.
|
|
*/
|
|
*fr_done = 1;
|
|
net->fast_retran_ip = 1;
|
|
}
|
|
|
|
/*
|
|
* if no AUTH is yet included and this chunk requires it,
|
|
* make sure to account for it. We don't apply the size
|
|
* until the AUTH chunk is actually added below in case
|
|
* there is no room for this chunk.
|
|
*/
|
|
if (data_auth_reqd && (auth == NULL)) {
|
|
dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
|
|
} else
|
|
dmtu = 0;
|
|
|
|
if ((chk->send_size <= (mtu - dmtu)) ||
|
|
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
|
|
/* ok we will add this one */
|
|
if (data_auth_reqd) {
|
|
if (auth == NULL) {
|
|
m = sctp_add_auth_chunk(m,
|
|
&endofchain,
|
|
&auth,
|
|
&auth_offset,
|
|
stcb,
|
|
SCTP_DATA);
|
|
auth_keyid = chk->auth_keyid;
|
|
override_ok = 0;
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
} else if (override_ok) {
|
|
auth_keyid = chk->auth_keyid;
|
|
override_ok = 0;
|
|
} else if (chk->auth_keyid != auth_keyid) {
|
|
/* different keyid, so done bundling */
|
|
break;
|
|
}
|
|
}
|
|
m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
|
|
if (m == NULL) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
/* Do clear IP_DF ? */
|
|
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
/* upate our MTU size */
|
|
if (mtu > (chk->send_size + dmtu))
|
|
mtu -= (chk->send_size + dmtu);
|
|
else
|
|
mtu = 0;
|
|
data_list[bundle_at++] = chk;
|
|
if (one_chunk && (asoc->total_flight <= 0)) {
|
|
SCTP_STAT_INCR(sctps_windowprobed);
|
|
}
|
|
}
|
|
if (one_chunk == 0) {
|
|
/*
|
|
* now are there anymore forward from chk to pick
|
|
* up?
|
|
*/
|
|
for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
|
|
if (fwd->sent != SCTP_DATAGRAM_RESEND) {
|
|
/* Nope, not for retran */
|
|
continue;
|
|
}
|
|
if (fwd->whoTo != net) {
|
|
/* Nope, not the net in question */
|
|
continue;
|
|
}
|
|
if (data_auth_reqd && (auth == NULL)) {
|
|
dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
|
|
} else
|
|
dmtu = 0;
|
|
if (fwd->send_size <= (mtu - dmtu)) {
|
|
if (data_auth_reqd) {
|
|
if (auth == NULL) {
|
|
m = sctp_add_auth_chunk(m,
|
|
&endofchain,
|
|
&auth,
|
|
&auth_offset,
|
|
stcb,
|
|
SCTP_DATA);
|
|
auth_keyid = fwd->auth_keyid;
|
|
override_ok = 0;
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
} else if (override_ok) {
|
|
auth_keyid = fwd->auth_keyid;
|
|
override_ok = 0;
|
|
} else if (fwd->auth_keyid != auth_keyid) {
|
|
/* different keyid,
|
|
* so done bundling */
|
|
break;
|
|
}
|
|
}
|
|
m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
|
|
if (m == NULL) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
/* Do clear IP_DF ? */
|
|
if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
|
|
no_fragmentflg = 0;
|
|
}
|
|
/* upate our MTU size */
|
|
if (mtu > (fwd->send_size + dmtu))
|
|
mtu -= (fwd->send_size + dmtu);
|
|
else
|
|
mtu = 0;
|
|
data_list[bundle_at++] = fwd;
|
|
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
|
|
break;
|
|
}
|
|
} else {
|
|
/* can't fit so we are done */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* Is there something to send for this destination? */
|
|
if (m) {
|
|
/*
|
|
* No matter if we fail/or succeed we should start a
|
|
* timer. A failure is like a lost IP packet :-)
|
|
*/
|
|
if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
|
|
/*
|
|
* no timer running on this destination
|
|
* restart it.
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
tmr_started = 1;
|
|
}
|
|
/* Now lets send it, if there is anything to send :> */
|
|
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
|
|
(struct sockaddr *)&net->ro._l_addr, m,
|
|
auth_offset, auth, auth_keyid,
|
|
no_fragmentflg, 0, 0,
|
|
inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
|
|
net->port, NULL,
|
|
0, 0,
|
|
so_locked))) {
|
|
/* error, we could not output */
|
|
SCTP_STAT_INCR(sctps_lowlevelerr);
|
|
return (error);
|
|
}
|
|
endofchain = NULL;
|
|
auth = NULL;
|
|
auth_offset = 0;
|
|
/* For HB's */
|
|
/*
|
|
* We don't want to mark the net->sent time here
|
|
* since this we use this for HB and retrans cannot
|
|
* measure RTT
|
|
*/
|
|
/* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
|
|
|
|
/* For auto-close */
|
|
cnt_thru++;
|
|
if (*now_filled == 0) {
|
|
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
|
|
*now = asoc->time_last_sent;
|
|
*now_filled = 1;
|
|
} else {
|
|
asoc->time_last_sent = *now;
|
|
}
|
|
*cnt_out += bundle_at;
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xC4, bundle_at);
|
|
#endif
|
|
if (bundle_at) {
|
|
tsns_sent = data_list[0]->rec.data.tsn;
|
|
}
|
|
for (i = 0; i < bundle_at; i++) {
|
|
SCTP_STAT_INCR(sctps_sendretransdata);
|
|
data_list[i]->sent = SCTP_DATAGRAM_SENT;
|
|
/*
|
|
* When we have a revoked data, and we
|
|
* retransmit it, then we clear the revoked
|
|
* flag since this flag dictates if we
|
|
* subtracted from the fs
|
|
*/
|
|
if (data_list[i]->rec.data.chunk_was_revoked) {
|
|
/* Deflate the cwnd */
|
|
data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
|
|
data_list[i]->rec.data.chunk_was_revoked = 0;
|
|
}
|
|
data_list[i]->snd_count++;
|
|
sctp_ucount_decr(asoc->sent_queue_retran_cnt);
|
|
/* record the time */
|
|
data_list[i]->sent_rcv_time = asoc->time_last_sent;
|
|
if (data_list[i]->book_size_scale) {
|
|
/*
|
|
* need to double the book size on
|
|
* this one
|
|
*/
|
|
data_list[i]->book_size_scale = 0;
|
|
/*
|
|
* Since we double the booksize, we
|
|
* must also double the output queue
|
|
* size, since this get shrunk when
|
|
* we free by this amount.
|
|
*/
|
|
atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
|
|
data_list[i]->book_size *= 2;
|
|
|
|
|
|
} else {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
|
|
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
|
|
asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
|
|
}
|
|
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
|
|
(uint32_t) (data_list[i]->send_size +
|
|
SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
|
|
sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
|
|
data_list[i]->whoTo->flight_size,
|
|
data_list[i]->book_size,
|
|
(uint32_t) (uintptr_t) data_list[i]->whoTo,
|
|
data_list[i]->rec.data.tsn);
|
|
}
|
|
sctp_flight_size_increase(data_list[i]);
|
|
sctp_total_flight_increase(stcb, data_list[i]);
|
|
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
|
|
/* SWS sender side engages */
|
|
asoc->peers_rwnd = 0;
|
|
}
|
|
if ((i == 0) &&
|
|
(data_list[i]->rec.data.doing_fast_retransmit)) {
|
|
SCTP_STAT_INCR(sctps_sendfastretrans);
|
|
if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
|
|
(tmr_started == 0)) {
|
|
/*-
|
|
* ok we just fast-retrans'd
|
|
* the lowest TSN, i.e the
|
|
* first on the list. In
|
|
* this case we want to give
|
|
* some more time to get a
|
|
* SACK back without a
|
|
* t3-expiring.
|
|
*/
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
|
|
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
|
|
}
|
|
}
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(21, inp, stcb, NULL);
|
|
#endif
|
|
} else {
|
|
/* None will fit */
|
|
return (1);
|
|
}
|
|
if (asoc->sent_queue_retran_cnt <= 0) {
|
|
/* all done we have no more to retran */
|
|
asoc->sent_queue_retran_cnt = 0;
|
|
break;
|
|
}
|
|
if (one_chunk) {
|
|
/* No more room in rwnd */
|
|
return (1);
|
|
}
|
|
/* stop the for loop here. we sent out a packet */
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sctp_timer_validation(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct sctp_nets *net;
|
|
|
|
/* Validate that a timer is running somewhere */
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
|
|
/* Here is a timer */
|
|
return;
|
|
}
|
|
}
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
/* Gak, we did not have a timer somewhere */
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
|
|
if (asoc->alternate) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
|
|
} else {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
|
|
}
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_chunk_output(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
int from_where,
|
|
int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
/*-
|
|
* Ok this is the generic chunk service queue. we must do the
|
|
* following:
|
|
* - See if there are retransmits pending, if so we must
|
|
* do these first.
|
|
* - Service the stream queue that is next, moving any
|
|
* message (note I must get a complete message i.e.
|
|
* FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
|
|
* TSN's
|
|
* - Check to see if the cwnd/rwnd allows any output, if so we
|
|
* go ahead and fomulate and send the low level chunks. Making sure
|
|
* to combine any control in the control chunk queue also.
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_nets *net;
|
|
int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
|
|
unsigned int burst_cnt = 0;
|
|
struct timeval now;
|
|
int now_filled = 0;
|
|
int nagle_on;
|
|
int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
|
|
int un_sent = 0;
|
|
int fr_done;
|
|
unsigned int tot_frs = 0;
|
|
|
|
asoc = &stcb->asoc;
|
|
do_it_again:
|
|
/* The Nagle algorithm is only applied when handling a send call. */
|
|
if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
|
|
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
|
|
nagle_on = 0;
|
|
} else {
|
|
nagle_on = 1;
|
|
}
|
|
} else {
|
|
nagle_on = 0;
|
|
}
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
|
|
un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
|
|
|
|
if ((un_sent <= 0) &&
|
|
(TAILQ_EMPTY(&asoc->control_send_queue)) &&
|
|
(TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
|
|
(asoc->sent_queue_retran_cnt == 0) &&
|
|
(asoc->trigger_reset == 0)) {
|
|
/* Nothing to do unless there is something to be sent left */
|
|
return;
|
|
}
|
|
/*
|
|
* Do we have something to send, data or control AND a sack timer
|
|
* running, if so piggy-back the sack.
|
|
*/
|
|
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
|
|
sctp_send_sack(stcb, so_locked);
|
|
(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
|
|
}
|
|
while (asoc->sent_queue_retran_cnt) {
|
|
/*-
|
|
* Ok, it is retransmission time only, we send out only ONE
|
|
* packet with a single call off to the retran code.
|
|
*/
|
|
if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
|
|
/*-
|
|
* Special hook for handling cookiess discarded
|
|
* by peer that carried data. Send cookie-ack only
|
|
* and then the next call with get the retran's.
|
|
*/
|
|
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
|
|
from_where,
|
|
&now, &now_filled, frag_point, so_locked);
|
|
return;
|
|
} else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
|
|
/* if its not from a HB then do it */
|
|
fr_done = 0;
|
|
ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
|
|
if (fr_done) {
|
|
tot_frs++;
|
|
}
|
|
} else {
|
|
/*
|
|
* its from any other place, we don't allow retran
|
|
* output (only control)
|
|
*/
|
|
ret = 1;
|
|
}
|
|
if (ret > 0) {
|
|
/* Can't send anymore */
|
|
/*-
|
|
* now lets push out control by calling med-level
|
|
* output once. this assures that we WILL send HB's
|
|
* if queued too.
|
|
*/
|
|
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
|
|
from_where,
|
|
&now, &now_filled, frag_point, so_locked);
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(8, inp, stcb, NULL);
|
|
#endif
|
|
sctp_timer_validation(inp, stcb, asoc);
|
|
return;
|
|
}
|
|
if (ret < 0) {
|
|
/*-
|
|
* The count was off.. retran is not happening so do
|
|
* the normal retransmission.
|
|
*/
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(9, inp, stcb, NULL);
|
|
#endif
|
|
if (ret == SCTP_RETRAN_EXIT) {
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
if (from_where == SCTP_OUTPUT_FROM_T3) {
|
|
/* Only one transmission allowed out of a timeout */
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(10, inp, stcb, NULL);
|
|
#endif
|
|
/* Push out any control */
|
|
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
|
|
&now, &now_filled, frag_point, so_locked);
|
|
return;
|
|
}
|
|
if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
|
|
/* Hit FR burst limit */
|
|
return;
|
|
}
|
|
if ((num_out == 0) && (ret == 0)) {
|
|
/* No more retrans to send */
|
|
break;
|
|
}
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_auditing(12, inp, stcb, NULL);
|
|
#endif
|
|
/* Check for bad destinations, if they exist move chunks around. */
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
|
|
/*-
|
|
* if possible move things off of this address we
|
|
* still may send below due to the dormant state but
|
|
* we try to find an alternate address to send to
|
|
* and if we have one we move all queued data on the
|
|
* out wheel to this alternate address.
|
|
*/
|
|
if (net->ref_count > 1)
|
|
sctp_move_chunks_from_net(stcb, net);
|
|
} else {
|
|
/*-
|
|
* if ((asoc->sat_network) || (net->addr_is_local))
|
|
* { burst_limit = asoc->max_burst *
|
|
* SCTP_SAT_NETWORK_BURST_INCR; }
|
|
*/
|
|
if (asoc->max_burst > 0) {
|
|
if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
|
|
if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
|
|
/* JRS - Use the congestion
|
|
* control given in the
|
|
* congestion control module */
|
|
asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
|
|
sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
|
|
}
|
|
SCTP_STAT_INCR(sctps_maxburstqueued);
|
|
}
|
|
net->fast_retran_ip = 0;
|
|
} else {
|
|
if (net->flight_size == 0) {
|
|
/* Should be decaying the
|
|
* cwnd here */
|
|
;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
burst_cnt = 0;
|
|
do {
|
|
error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
|
|
&reason_code, 0, from_where,
|
|
&now, &now_filled, frag_point, so_locked);
|
|
if (error) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
|
|
sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
|
|
sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
|
|
}
|
|
break;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
|
|
|
|
tot_out += num_out;
|
|
burst_cnt++;
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
|
|
if (num_out == 0) {
|
|
sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
|
|
}
|
|
}
|
|
if (nagle_on) {
|
|
/*
|
|
* When the Nagle algorithm is used, look at how
|
|
* much is unsent, then if its smaller than an MTU
|
|
* and we have data in flight we stop, except if we
|
|
* are handling a fragmented user message.
|
|
*/
|
|
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
|
|
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
|
|
if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
|
|
(stcb->asoc.total_flight > 0)) {
|
|
/* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
|
|
break;
|
|
}
|
|
}
|
|
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
|
|
TAILQ_EMPTY(&asoc->send_queue) &&
|
|
sctp_is_there_unsent_data(stcb, so_locked) == 0) {
|
|
/* Nothing left to send */
|
|
break;
|
|
}
|
|
if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
|
|
/* Nothing left to send */
|
|
break;
|
|
}
|
|
} while (num_out &&
|
|
((asoc->max_burst == 0) ||
|
|
SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
|
|
(burst_cnt < asoc->max_burst)));
|
|
|
|
if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
|
|
if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
|
|
SCTP_STAT_INCR(sctps_maxburstqueued);
|
|
asoc->burst_limit_applied = 1;
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
|
|
sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
|
|
}
|
|
} else {
|
|
asoc->burst_limit_applied = 0;
|
|
}
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
|
|
sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
|
|
tot_out);
|
|
|
|
/*-
|
|
* Now we need to clean up the control chunk chain if a ECNE is on
|
|
* it. It must be marked as UNSENT again so next call will continue
|
|
* to send it until such time that we get a CWR, to remove it.
|
|
*/
|
|
if (stcb->asoc.ecn_echo_cnt_onq)
|
|
sctp_fix_ecn_echo(asoc);
|
|
|
|
if (stcb->asoc.trigger_reset) {
|
|
if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
|
|
goto do_it_again;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
int
|
|
sctp_output(
|
|
struct sctp_inpcb *inp,
|
|
struct mbuf *m,
|
|
struct sockaddr *addr,
|
|
struct mbuf *control,
|
|
struct thread *p,
|
|
int flags)
|
|
{
|
|
if (inp == NULL) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
if (inp->sctp_socket == NULL) {
|
|
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
return (sctp_sosend(inp->sctp_socket,
|
|
addr,
|
|
(struct uio *)NULL,
|
|
m,
|
|
control,
|
|
flags, p
|
|
));
|
|
}
|
|
|
|
void
|
|
send_forward_tsn(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct sctp_tmit_chunk *chk, *at, *tp1, *last;
|
|
struct sctp_forward_tsn_chunk *fwdtsn;
|
|
struct sctp_strseq *strseq;
|
|
struct sctp_strseq_mid *strseq_m;
|
|
uint32_t advance_peer_ack_point;
|
|
unsigned int cnt_of_space, i, ovh;
|
|
unsigned int space_needed;
|
|
unsigned int cnt_of_skipped = 0;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
|
|
/* mark it to unsent */
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
/* Do we correct its output location? */
|
|
if (chk->whoTo) {
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = NULL;
|
|
}
|
|
goto sctp_fill_in_rest;
|
|
}
|
|
}
|
|
/* Ok if we reach here we must build one */
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
asoc->fwd_tsn_cnt++;
|
|
chk->copy_by_ref = 0;
|
|
/*
|
|
* We don't do the old thing here since this is used not for on-wire
|
|
* but to tell if we are sending a fwd-tsn by the stack during
|
|
* output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
|
|
*/
|
|
chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = asoc;
|
|
chk->whoTo = NULL;
|
|
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
sctp_fill_in_rest:
|
|
/*-
|
|
* Here we go through and fill out the part that deals with
|
|
* stream/seq of the ones we skip.
|
|
*/
|
|
SCTP_BUF_LEN(chk->data) = 0;
|
|
TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
|
|
if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
|
|
(at->sent != SCTP_DATAGRAM_NR_ACKED)) {
|
|
/* no more to look at */
|
|
break;
|
|
}
|
|
if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
|
|
/* We don't report these */
|
|
continue;
|
|
}
|
|
cnt_of_skipped++;
|
|
}
|
|
if (asoc->idata_supported) {
|
|
space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
|
|
(cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
|
|
} else {
|
|
space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
|
|
(cnt_of_skipped * sizeof(struct sctp_strseq)));
|
|
}
|
|
cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
|
|
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
ovh = SCTP_MIN_OVERHEAD;
|
|
} else {
|
|
ovh = SCTP_MIN_V4_OVERHEAD;
|
|
}
|
|
if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
|
|
/* trim to a mtu size */
|
|
cnt_of_space = asoc->smallest_mtu - ovh;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
|
|
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
|
|
0xff, 0, cnt_of_skipped,
|
|
asoc->advanced_peer_ack_point);
|
|
}
|
|
advance_peer_ack_point = asoc->advanced_peer_ack_point;
|
|
if (cnt_of_space < space_needed) {
|
|
/*-
|
|
* ok we must trim down the chunk by lowering the
|
|
* advance peer ack point.
|
|
*/
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
|
|
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
|
|
0xff, 0xff, cnt_of_space,
|
|
space_needed);
|
|
}
|
|
cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
|
|
if (asoc->idata_supported) {
|
|
cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
|
|
} else {
|
|
cnt_of_skipped /= sizeof(struct sctp_strseq);
|
|
}
|
|
/*-
|
|
* Go through and find the TSN that will be the one
|
|
* we report.
|
|
*/
|
|
at = TAILQ_FIRST(&asoc->sent_queue);
|
|
if (at != NULL) {
|
|
for (i = 0; i < cnt_of_skipped; i++) {
|
|
tp1 = TAILQ_NEXT(at, sctp_next);
|
|
if (tp1 == NULL) {
|
|
break;
|
|
}
|
|
at = tp1;
|
|
}
|
|
}
|
|
if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
|
|
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
|
|
0xff, cnt_of_skipped, at->rec.data.tsn,
|
|
asoc->advanced_peer_ack_point);
|
|
}
|
|
last = at;
|
|
/*-
|
|
* last now points to last one I can report, update
|
|
* peer ack point
|
|
*/
|
|
if (last) {
|
|
advance_peer_ack_point = last->rec.data.tsn;
|
|
}
|
|
if (asoc->idata_supported) {
|
|
space_needed = sizeof(struct sctp_forward_tsn_chunk) +
|
|
cnt_of_skipped * sizeof(struct sctp_strseq_mid);
|
|
} else {
|
|
space_needed = sizeof(struct sctp_forward_tsn_chunk) +
|
|
cnt_of_skipped * sizeof(struct sctp_strseq);
|
|
}
|
|
}
|
|
chk->send_size = space_needed;
|
|
/* Setup the chunk */
|
|
fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
|
|
fwdtsn->ch.chunk_length = htons(chk->send_size);
|
|
fwdtsn->ch.chunk_flags = 0;
|
|
if (asoc->idata_supported) {
|
|
fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
|
|
} else {
|
|
fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
|
|
}
|
|
fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
fwdtsn++;
|
|
/*-
|
|
* Move pointer to after the fwdtsn and transfer to the
|
|
* strseq pointer.
|
|
*/
|
|
if (asoc->idata_supported) {
|
|
strseq_m = (struct sctp_strseq_mid *)fwdtsn;
|
|
strseq = NULL;
|
|
} else {
|
|
strseq = (struct sctp_strseq *)fwdtsn;
|
|
strseq_m = NULL;
|
|
}
|
|
/*-
|
|
* Now populate the strseq list. This is done blindly
|
|
* without pulling out duplicate stream info. This is
|
|
* inefficent but won't harm the process since the peer will
|
|
* look at these in sequence and will thus release anything.
|
|
* It could mean we exceed the PMTU and chop off some that
|
|
* we could have included.. but this is unlikely (aka 1432/4
|
|
* would mean 300+ stream seq's would have to be reported in
|
|
* one FWD-TSN. With a bit of work we can later FIX this to
|
|
* optimize and pull out duplicates.. but it does add more
|
|
* overhead. So for now... not!
|
|
*/
|
|
i = 0;
|
|
TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
|
|
if (i >= cnt_of_skipped) {
|
|
break;
|
|
}
|
|
if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
|
|
/* We don't report these */
|
|
continue;
|
|
}
|
|
if (at->rec.data.tsn == advance_peer_ack_point) {
|
|
at->rec.data.fwd_tsn_cnt = 0;
|
|
}
|
|
if (asoc->idata_supported) {
|
|
strseq_m->sid = htons(at->rec.data.sid);
|
|
if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
|
|
strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
|
|
} else {
|
|
strseq_m->flags = 0;
|
|
}
|
|
strseq_m->mid = htonl(at->rec.data.mid);
|
|
strseq_m++;
|
|
} else {
|
|
strseq->sid = htons(at->rec.data.sid);
|
|
strseq->ssn = htons((uint16_t) at->rec.data.mid);
|
|
strseq++;
|
|
}
|
|
i++;
|
|
}
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_sack(struct sctp_tcb *stcb, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
/*-
|
|
* Queue up a SACK or NR-SACK in the control queue.
|
|
* We must first check to see if a SACK or NR-SACK is
|
|
* somehow on the control queue.
|
|
* If so, we will take and and remove the old one.
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk, *a_chk;
|
|
struct sctp_sack_chunk *sack;
|
|
struct sctp_nr_sack_chunk *nr_sack;
|
|
struct sctp_gap_ack_block *gap_descriptor;
|
|
const struct sack_track *selector;
|
|
int mergeable = 0;
|
|
int offset;
|
|
caddr_t limit;
|
|
uint32_t *dup;
|
|
int limit_reached = 0;
|
|
unsigned int i, siz, j;
|
|
unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
|
|
int num_dups = 0;
|
|
int space_req;
|
|
uint32_t highest_tsn;
|
|
uint8_t flags;
|
|
uint8_t type;
|
|
uint8_t tsn_map;
|
|
|
|
if (stcb->asoc.nrsack_supported == 1) {
|
|
type = SCTP_NR_SELECTIVE_ACK;
|
|
} else {
|
|
type = SCTP_SELECTIVE_ACK;
|
|
}
|
|
a_chk = NULL;
|
|
asoc = &stcb->asoc;
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if (asoc->last_data_chunk_from == NULL) {
|
|
/* Hmm we never received anything */
|
|
return;
|
|
}
|
|
sctp_slide_mapping_arrays(stcb);
|
|
sctp_set_rwnd(stcb, asoc);
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id.id == type) {
|
|
/* Hmm, found a sack already on queue, remove it */
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt--;
|
|
a_chk = chk;
|
|
if (a_chk->data) {
|
|
sctp_m_freem(a_chk->data);
|
|
a_chk->data = NULL;
|
|
}
|
|
if (a_chk->whoTo) {
|
|
sctp_free_remote_addr(a_chk->whoTo);
|
|
a_chk->whoTo = NULL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (a_chk == NULL) {
|
|
sctp_alloc_a_chunk(stcb, a_chk);
|
|
if (a_chk == NULL) {
|
|
/* No memory so we drop the idea, and set a timer */
|
|
if (stcb->asoc.delayed_ack) {
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL,
|
|
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
} else {
|
|
stcb->asoc.send_sack = 1;
|
|
}
|
|
return;
|
|
}
|
|
a_chk->copy_by_ref = 0;
|
|
a_chk->rec.chunk_id.id = type;
|
|
a_chk->rec.chunk_id.can_take_data = 1;
|
|
}
|
|
/* Clear our pkt counts */
|
|
asoc->data_pkts_seen = 0;
|
|
|
|
a_chk->flags = 0;
|
|
a_chk->asoc = asoc;
|
|
a_chk->snd_count = 0;
|
|
a_chk->send_size = 0; /* fill in later */
|
|
a_chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
a_chk->whoTo = NULL;
|
|
|
|
if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
|
|
/*-
|
|
* Ok, the destination for the SACK is unreachable, lets see if
|
|
* we can select an alternate to asoc->last_data_chunk_from
|
|
*/
|
|
a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
|
|
if (a_chk->whoTo == NULL) {
|
|
/* Nope, no alternate */
|
|
a_chk->whoTo = asoc->last_data_chunk_from;
|
|
}
|
|
} else {
|
|
a_chk->whoTo = asoc->last_data_chunk_from;
|
|
}
|
|
if (a_chk->whoTo) {
|
|
atomic_add_int(&a_chk->whoTo->ref_count, 1);
|
|
}
|
|
if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
|
|
highest_tsn = asoc->highest_tsn_inside_map;
|
|
} else {
|
|
highest_tsn = asoc->highest_tsn_inside_nr_map;
|
|
}
|
|
if (highest_tsn == asoc->cumulative_tsn) {
|
|
/* no gaps */
|
|
if (type == SCTP_SELECTIVE_ACK) {
|
|
space_req = sizeof(struct sctp_sack_chunk);
|
|
} else {
|
|
space_req = sizeof(struct sctp_nr_sack_chunk);
|
|
}
|
|
} else {
|
|
/* gaps get a cluster */
|
|
space_req = MCLBYTES;
|
|
}
|
|
/* Ok now lets formulate a MBUF with our sack */
|
|
a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
|
|
if ((a_chk->data == NULL) ||
|
|
(a_chk->whoTo == NULL)) {
|
|
/* rats, no mbuf memory */
|
|
if (a_chk->data) {
|
|
/* was a problem with the destination */
|
|
sctp_m_freem(a_chk->data);
|
|
a_chk->data = NULL;
|
|
}
|
|
sctp_free_a_chunk(stcb, a_chk, so_locked);
|
|
/* sa_ignore NO_NULL_CHK */
|
|
if (stcb->asoc.delayed_ack) {
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL,
|
|
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
} else {
|
|
stcb->asoc.send_sack = 1;
|
|
}
|
|
return;
|
|
}
|
|
/* ok, lets go through and fill it in */
|
|
SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
|
|
space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
|
|
if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
|
|
space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
|
|
}
|
|
limit = mtod(a_chk->data, caddr_t);
|
|
limit += space;
|
|
|
|
flags = 0;
|
|
|
|
if ((asoc->sctp_cmt_on_off > 0) &&
|
|
SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
|
|
/*-
|
|
* CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
|
|
* received, then set high bit to 1, else 0. Reset
|
|
* pkts_rcvd.
|
|
*/
|
|
flags |= (asoc->cmt_dac_pkts_rcvd << 6);
|
|
asoc->cmt_dac_pkts_rcvd = 0;
|
|
}
|
|
#ifdef SCTP_ASOCLOG_OF_TSNS
|
|
stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
|
|
stcb->asoc.cumack_log_atsnt++;
|
|
if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
|
|
stcb->asoc.cumack_log_atsnt = 0;
|
|
}
|
|
#endif
|
|
/* reset the readers interpretation */
|
|
stcb->freed_by_sorcv_sincelast = 0;
|
|
|
|
if (type == SCTP_SELECTIVE_ACK) {
|
|
sack = mtod(a_chk->data, struct sctp_sack_chunk *);
|
|
nr_sack = NULL;
|
|
gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
|
|
if (highest_tsn > asoc->mapping_array_base_tsn) {
|
|
siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
|
|
} else {
|
|
siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
|
|
}
|
|
} else {
|
|
sack = NULL;
|
|
nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
|
|
gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
|
|
if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
|
|
siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
|
|
} else {
|
|
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
|
|
}
|
|
}
|
|
|
|
if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
|
|
offset = 1;
|
|
} else {
|
|
offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
|
|
}
|
|
if (((type == SCTP_SELECTIVE_ACK) &&
|
|
SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
|
|
((type == SCTP_NR_SELECTIVE_ACK) &&
|
|
SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
|
|
/* we have a gap .. maybe */
|
|
for (i = 0; i < siz; i++) {
|
|
tsn_map = asoc->mapping_array[i];
|
|
if (type == SCTP_SELECTIVE_ACK) {
|
|
tsn_map |= asoc->nr_mapping_array[i];
|
|
}
|
|
if (i == 0) {
|
|
/*
|
|
* Clear all bits corresponding to TSNs
|
|
* smaller or equal to the cumulative TSN.
|
|
*/
|
|
tsn_map &= (~0U << (1 - offset));
|
|
}
|
|
selector = &sack_array[tsn_map];
|
|
if (mergeable && selector->right_edge) {
|
|
/*
|
|
* Backup, left and right edges were ok to
|
|
* merge.
|
|
*/
|
|
num_gap_blocks--;
|
|
gap_descriptor--;
|
|
}
|
|
if (selector->num_entries == 0)
|
|
mergeable = 0;
|
|
else {
|
|
for (j = 0; j < selector->num_entries; j++) {
|
|
if (mergeable && selector->right_edge) {
|
|
/*
|
|
* do a merge by NOT setting
|
|
* the left side
|
|
*/
|
|
mergeable = 0;
|
|
} else {
|
|
/*
|
|
* no merge, set the left
|
|
* side
|
|
*/
|
|
mergeable = 0;
|
|
gap_descriptor->start = htons((selector->gaps[j].start + offset));
|
|
}
|
|
gap_descriptor->end = htons((selector->gaps[j].end + offset));
|
|
num_gap_blocks++;
|
|
gap_descriptor++;
|
|
if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
|
|
/* no more room */
|
|
limit_reached = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (selector->left_edge) {
|
|
mergeable = 1;
|
|
}
|
|
}
|
|
if (limit_reached) {
|
|
/* Reached the limit stop */
|
|
break;
|
|
}
|
|
offset += 8;
|
|
}
|
|
}
|
|
if ((type == SCTP_NR_SELECTIVE_ACK) &&
|
|
(limit_reached == 0)) {
|
|
|
|
mergeable = 0;
|
|
|
|
if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
|
|
siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
|
|
} else {
|
|
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
|
|
}
|
|
|
|
if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
|
|
offset = 1;
|
|
} else {
|
|
offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
|
|
}
|
|
if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
|
|
/* we have a gap .. maybe */
|
|
for (i = 0; i < siz; i++) {
|
|
tsn_map = asoc->nr_mapping_array[i];
|
|
if (i == 0) {
|
|
/*
|
|
* Clear all bits corresponding to
|
|
* TSNs smaller or equal to the
|
|
* cumulative TSN.
|
|
*/
|
|
tsn_map &= (~0U << (1 - offset));
|
|
}
|
|
selector = &sack_array[tsn_map];
|
|
if (mergeable && selector->right_edge) {
|
|
/*
|
|
* Backup, left and right edges were
|
|
* ok to merge.
|
|
*/
|
|
num_nr_gap_blocks--;
|
|
gap_descriptor--;
|
|
}
|
|
if (selector->num_entries == 0)
|
|
mergeable = 0;
|
|
else {
|
|
for (j = 0; j < selector->num_entries; j++) {
|
|
if (mergeable && selector->right_edge) {
|
|
/*
|
|
* do a merge by NOT
|
|
* setting the left
|
|
* side
|
|
*/
|
|
mergeable = 0;
|
|
} else {
|
|
/*
|
|
* no merge, set the
|
|
* left side
|
|
*/
|
|
mergeable = 0;
|
|
gap_descriptor->start = htons((selector->gaps[j].start + offset));
|
|
}
|
|
gap_descriptor->end = htons((selector->gaps[j].end + offset));
|
|
num_nr_gap_blocks++;
|
|
gap_descriptor++;
|
|
if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
|
|
/* no more room */
|
|
limit_reached = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (selector->left_edge) {
|
|
mergeable = 1;
|
|
}
|
|
}
|
|
if (limit_reached) {
|
|
/* Reached the limit stop */
|
|
break;
|
|
}
|
|
offset += 8;
|
|
}
|
|
}
|
|
}
|
|
/* now we must add any dups we are going to report. */
|
|
if ((limit_reached == 0) && (asoc->numduptsns)) {
|
|
dup = (uint32_t *) gap_descriptor;
|
|
for (i = 0; i < asoc->numduptsns; i++) {
|
|
*dup = htonl(asoc->dup_tsns[i]);
|
|
dup++;
|
|
num_dups++;
|
|
if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
|
|
/* no more room */
|
|
break;
|
|
}
|
|
}
|
|
asoc->numduptsns = 0;
|
|
}
|
|
/*
|
|
* now that the chunk is prepared queue it to the control chunk
|
|
* queue.
|
|
*/
|
|
if (type == SCTP_SELECTIVE_ACK) {
|
|
a_chk->send_size = (uint16_t) (sizeof(struct sctp_sack_chunk) +
|
|
(num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
|
|
num_dups * sizeof(int32_t));
|
|
SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
|
|
sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
|
|
sack->sack.a_rwnd = htonl(asoc->my_rwnd);
|
|
sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
|
|
sack->sack.num_dup_tsns = htons(num_dups);
|
|
sack->ch.chunk_type = type;
|
|
sack->ch.chunk_flags = flags;
|
|
sack->ch.chunk_length = htons(a_chk->send_size);
|
|
} else {
|
|
a_chk->send_size = (uint16_t) (sizeof(struct sctp_nr_sack_chunk) +
|
|
(num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
|
|
num_dups * sizeof(int32_t));
|
|
SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
|
|
nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
|
|
nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
|
|
nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
|
|
nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
|
|
nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
|
|
nr_sack->nr_sack.reserved = 0;
|
|
nr_sack->ch.chunk_type = type;
|
|
nr_sack->ch.chunk_flags = flags;
|
|
nr_sack->ch.chunk_length = htons(a_chk->send_size);
|
|
}
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
|
|
asoc->my_last_reported_rwnd = asoc->my_rwnd;
|
|
asoc->ctrl_queue_cnt++;
|
|
asoc->send_sack = 0;
|
|
SCTP_STAT_INCR(sctps_sendsacks);
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
struct mbuf *m_abort, *m, *m_last;
|
|
struct mbuf *m_out, *m_end = NULL;
|
|
struct sctp_abort_chunk *abort;
|
|
struct sctp_auth_chunk *auth = NULL;
|
|
struct sctp_nets *net;
|
|
uint32_t vtag;
|
|
uint32_t auth_offset = 0;
|
|
uint16_t cause_len, chunk_len, padding_len;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
/*-
|
|
* Add an AUTH chunk, if chunk requires it and save the offset into
|
|
* the chain for AUTH
|
|
*/
|
|
if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
|
|
stcb->asoc.peer_auth_chunks)) {
|
|
m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
|
|
stcb, SCTP_ABORT_ASSOCIATION);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
} else {
|
|
m_out = NULL;
|
|
}
|
|
m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (m_abort == NULL) {
|
|
if (m_out) {
|
|
sctp_m_freem(m_out);
|
|
}
|
|
if (operr) {
|
|
sctp_m_freem(operr);
|
|
}
|
|
return;
|
|
}
|
|
/* link in any error */
|
|
SCTP_BUF_NEXT(m_abort) = operr;
|
|
cause_len = 0;
|
|
m_last = NULL;
|
|
for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
|
|
cause_len += (uint16_t) SCTP_BUF_LEN(m);
|
|
if (SCTP_BUF_NEXT(m) == NULL) {
|
|
m_last = m;
|
|
}
|
|
}
|
|
SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
|
|
chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
|
|
padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
|
|
if (m_out == NULL) {
|
|
/* NO Auth chunk prepended, so reserve space in front */
|
|
SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
|
|
m_out = m_abort;
|
|
} else {
|
|
/* Put AUTH chunk at the front of the chain */
|
|
SCTP_BUF_NEXT(m_end) = m_abort;
|
|
}
|
|
if (stcb->asoc.alternate) {
|
|
net = stcb->asoc.alternate;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
/* Fill in the ABORT chunk header. */
|
|
abort = mtod(m_abort, struct sctp_abort_chunk *);
|
|
abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
|
|
if (stcb->asoc.peer_vtag == 0) {
|
|
/* This happens iff the assoc is in COOKIE-WAIT state. */
|
|
vtag = stcb->asoc.my_vtag;
|
|
abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
|
|
} else {
|
|
vtag = stcb->asoc.peer_vtag;
|
|
abort->ch.chunk_flags = 0;
|
|
}
|
|
abort->ch.chunk_length = htons(chunk_len);
|
|
/* Add padding, if necessary. */
|
|
if (padding_len > 0) {
|
|
if ((m_last == NULL) ||
|
|
(sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
|
|
sctp_m_freem(m_out);
|
|
return;
|
|
}
|
|
}
|
|
(void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
|
|
(struct sockaddr *)&net->ro._l_addr,
|
|
m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
|
|
stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
|
|
stcb->asoc.primary_destination->port, NULL,
|
|
0, 0,
|
|
so_locked);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
}
|
|
|
|
void
|
|
sctp_send_shutdown_complete(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
int reflect_vtag)
|
|
{
|
|
/* formulate and SEND a SHUTDOWN-COMPLETE */
|
|
struct mbuf *m_shutdown_comp;
|
|
struct sctp_shutdown_complete_chunk *shutdown_complete;
|
|
uint32_t vtag;
|
|
uint8_t flags;
|
|
|
|
m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (m_shutdown_comp == NULL) {
|
|
/* no mbuf's */
|
|
return;
|
|
}
|
|
if (reflect_vtag) {
|
|
flags = SCTP_HAD_NO_TCB;
|
|
vtag = stcb->asoc.my_vtag;
|
|
} else {
|
|
flags = 0;
|
|
vtag = stcb->asoc.peer_vtag;
|
|
}
|
|
shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
|
|
shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
|
|
shutdown_complete->ch.chunk_flags = flags;
|
|
shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
|
|
SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
|
|
(void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
|
|
(struct sockaddr *)&net->ro._l_addr,
|
|
m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
|
|
stcb->sctp_ep->sctp_lport, stcb->rport,
|
|
htonl(vtag),
|
|
net->port, NULL,
|
|
0, 0,
|
|
SCTP_SO_NOT_LOCKED);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, uint32_t vtag,
|
|
uint8_t type, struct mbuf *cause,
|
|
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
struct mbuf *o_pak;
|
|
struct mbuf *mout;
|
|
struct sctphdr *shout;
|
|
struct sctp_chunkhdr *ch;
|
|
#if defined(INET) || defined(INET6)
|
|
struct udphdr *udp;
|
|
int ret;
|
|
#endif
|
|
int len, cause_len, padding_len;
|
|
#ifdef INET
|
|
struct sockaddr_in *src_sin, *dst_sin;
|
|
struct ip *ip;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *src_sin6, *dst_sin6;
|
|
struct ip6_hdr *ip6;
|
|
#endif
|
|
|
|
/* Compute the length of the cause and add final padding. */
|
|
cause_len = 0;
|
|
if (cause != NULL) {
|
|
struct mbuf *m_at, *m_last = NULL;
|
|
|
|
for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
|
|
if (SCTP_BUF_NEXT(m_at) == NULL)
|
|
m_last = m_at;
|
|
cause_len += SCTP_BUF_LEN(m_at);
|
|
}
|
|
padding_len = cause_len % 4;
|
|
if (padding_len != 0) {
|
|
padding_len = 4 - padding_len;
|
|
}
|
|
if (padding_len != 0) {
|
|
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
|
|
sctp_m_freem(cause);
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
padding_len = 0;
|
|
}
|
|
/* Get an mbuf for the header. */
|
|
len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
len += sizeof(struct ip);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
len += sizeof(struct ip6_hdr);
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
#if defined(INET) || defined(INET6)
|
|
if (port) {
|
|
len += sizeof(struct udphdr);
|
|
}
|
|
#endif
|
|
mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
|
|
if (mout == NULL) {
|
|
if (cause) {
|
|
sctp_m_freem(cause);
|
|
}
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(mout, max_linkhdr);
|
|
SCTP_BUF_LEN(mout) = len;
|
|
SCTP_BUF_NEXT(mout) = cause;
|
|
M_SETFIB(mout, fibnum);
|
|
mout->m_pkthdr.flowid = mflowid;
|
|
M_HASHTYPE_SET(mout, mflowtype);
|
|
#ifdef INET
|
|
ip = NULL;
|
|
#endif
|
|
#ifdef INET6
|
|
ip6 = NULL;
|
|
#endif
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
src_sin = (struct sockaddr_in *)src;
|
|
dst_sin = (struct sockaddr_in *)dst;
|
|
ip = mtod(mout, struct ip *);
|
|
ip->ip_v = IPVERSION;
|
|
ip->ip_hl = (sizeof(struct ip) >> 2);
|
|
ip->ip_tos = 0;
|
|
ip->ip_off = 0;
|
|
ip_fillid(ip);
|
|
ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
|
|
if (port) {
|
|
ip->ip_p = IPPROTO_UDP;
|
|
} else {
|
|
ip->ip_p = IPPROTO_SCTP;
|
|
}
|
|
ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
|
|
ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
|
|
ip->ip_sum = 0;
|
|
len = sizeof(struct ip);
|
|
shout = (struct sctphdr *)((caddr_t)ip + len);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
src_sin6 = (struct sockaddr_in6 *)src;
|
|
dst_sin6 = (struct sockaddr_in6 *)dst;
|
|
ip6 = mtod(mout, struct ip6_hdr *);
|
|
ip6->ip6_flow = htonl(0x60000000);
|
|
if (V_ip6_auto_flowlabel) {
|
|
ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
|
|
}
|
|
ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
|
|
if (port) {
|
|
ip6->ip6_nxt = IPPROTO_UDP;
|
|
} else {
|
|
ip6->ip6_nxt = IPPROTO_SCTP;
|
|
}
|
|
ip6->ip6_src = dst_sin6->sin6_addr;
|
|
ip6->ip6_dst = src_sin6->sin6_addr;
|
|
len = sizeof(struct ip6_hdr);
|
|
shout = (struct sctphdr *)((caddr_t)ip6 + len);
|
|
break;
|
|
#endif
|
|
default:
|
|
len = 0;
|
|
shout = mtod(mout, struct sctphdr *);
|
|
break;
|
|
}
|
|
#if defined(INET) || defined(INET6)
|
|
if (port) {
|
|
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
|
|
sctp_m_freem(mout);
|
|
return;
|
|
}
|
|
udp = (struct udphdr *)shout;
|
|
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
|
|
udp->uh_dport = port;
|
|
udp->uh_sum = 0;
|
|
udp->uh_ulen = htons((uint16_t) (sizeof(struct udphdr) +
|
|
sizeof(struct sctphdr) +
|
|
sizeof(struct sctp_chunkhdr) +
|
|
cause_len + padding_len));
|
|
len += sizeof(struct udphdr);
|
|
shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
|
|
} else {
|
|
udp = NULL;
|
|
}
|
|
#endif
|
|
shout->src_port = sh->dest_port;
|
|
shout->dest_port = sh->src_port;
|
|
shout->checksum = 0;
|
|
if (vtag) {
|
|
shout->v_tag = htonl(vtag);
|
|
} else {
|
|
shout->v_tag = sh->v_tag;
|
|
}
|
|
len += sizeof(struct sctphdr);
|
|
ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
|
|
ch->chunk_type = type;
|
|
if (vtag) {
|
|
ch->chunk_flags = 0;
|
|
} else {
|
|
ch->chunk_flags = SCTP_HAD_NO_TCB;
|
|
}
|
|
ch->chunk_length = htons((uint16_t) (sizeof(struct sctp_chunkhdr) + cause_len));
|
|
len += sizeof(struct sctp_chunkhdr);
|
|
len += cause_len + padding_len;
|
|
|
|
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
|
|
sctp_m_freem(mout);
|
|
return;
|
|
}
|
|
SCTP_ATTACH_CHAIN(o_pak, mout, len);
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (port) {
|
|
if (V_udp_cksum) {
|
|
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
|
|
} else {
|
|
udp->uh_sum = 0;
|
|
}
|
|
}
|
|
ip->ip_len = htons(len);
|
|
if (port) {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
|
|
SCTP_STAT_INCR(sctps_sendswcrc);
|
|
#endif
|
|
if (V_udp_cksum) {
|
|
SCTP_ENABLE_UDP_CSUM(o_pak);
|
|
}
|
|
} else {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
mout->m_pkthdr.csum_flags = CSUM_SCTP;
|
|
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
|
|
SCTP_STAT_INCR(sctps_sendhwcrc);
|
|
#endif
|
|
}
|
|
#ifdef SCTP_PACKET_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
|
|
sctp_packet_log(o_pak);
|
|
}
|
|
#endif
|
|
SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
ip6->ip6_plen = (uint16_t) (len - sizeof(struct ip6_hdr));
|
|
if (port) {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
|
|
SCTP_STAT_INCR(sctps_sendswcrc);
|
|
#endif
|
|
if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
|
|
udp->uh_sum = 0xffff;
|
|
}
|
|
} else {
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_sendnocrc);
|
|
#else
|
|
mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
|
|
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
|
|
SCTP_STAT_INCR(sctps_sendhwcrc);
|
|
#endif
|
|
}
|
|
#ifdef SCTP_PACKET_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
|
|
sctp_packet_log(o_pak);
|
|
}
|
|
#endif
|
|
SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
|
|
break;
|
|
#endif
|
|
default:
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
|
|
dst->sa_family);
|
|
sctp_m_freem(mout);
|
|
SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
|
|
return;
|
|
}
|
|
SCTP_STAT_INCR(sctps_sendpackets);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh,
|
|
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
}
|
|
|
|
void
|
|
sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
|
|
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_UNUSED
|
|
#endif
|
|
)
|
|
{
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_heartbeat_chunk *hb;
|
|
struct timeval now;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if (net == NULL) {
|
|
return;
|
|
}
|
|
(void)SCTP_GETTIME_TIMEVAL(&now);
|
|
switch (net->ro._l_addr.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
break;
|
|
#endif
|
|
default:
|
|
return;
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_heartbeat_chunk);
|
|
|
|
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
/* Now we have a mbuf that we can fill in with the details */
|
|
hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
|
|
memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
|
|
/* fill out chunk header */
|
|
hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
|
|
hb->ch.chunk_flags = 0;
|
|
hb->ch.chunk_length = htons(chk->send_size);
|
|
/* Fill out hb parameter */
|
|
hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
|
|
hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
|
|
hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
|
|
hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
|
|
/* Did our user request this one, put it in */
|
|
hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
|
|
hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
|
|
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
|
|
/*
|
|
* we only take from the entropy pool if the address is not
|
|
* confirmed.
|
|
*/
|
|
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
|
|
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
|
|
} else {
|
|
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
|
|
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
|
|
}
|
|
switch (net->ro._l_addr.sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
memcpy(hb->heartbeat.hb_info.address,
|
|
&net->ro._l_addr.sin.sin_addr,
|
|
sizeof(net->ro._l_addr.sin.sin_addr));
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
memcpy(hb->heartbeat.hb_info.address,
|
|
&net->ro._l_addr.sin6.sin6_addr,
|
|
sizeof(net->ro._l_addr.sin6.sin6_addr));
|
|
break;
|
|
#endif
|
|
default:
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
return;
|
|
break;
|
|
}
|
|
net->hb_responded = 0;
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
stcb->asoc.ctrl_queue_cnt++;
|
|
SCTP_STAT_INCR(sctps_sendheartbeat);
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
|
|
uint32_t high_tsn)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_ecne_chunk *ecne;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
if (net == NULL) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
|
|
/* found a previous ECN_ECHO update it if needed */
|
|
uint32_t cnt, ctsn;
|
|
|
|
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
|
|
ctsn = ntohl(ecne->tsn);
|
|
if (SCTP_TSN_GT(high_tsn, ctsn)) {
|
|
ecne->tsn = htonl(high_tsn);
|
|
SCTP_STAT_INCR(sctps_queue_upd_ecne);
|
|
}
|
|
cnt = ntohl(ecne->num_pkts_since_cwr);
|
|
cnt++;
|
|
ecne->num_pkts_since_cwr = htonl(cnt);
|
|
return;
|
|
}
|
|
}
|
|
/* nope could not find one to update so we must build one */
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
SCTP_STAT_INCR(sctps_queue_upd_ecne);
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_ECN_ECHO;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_ecne_chunk);
|
|
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
|
|
stcb->asoc.ecn_echo_cnt_onq++;
|
|
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
|
|
ecne->ch.chunk_type = SCTP_ECN_ECHO;
|
|
ecne->ch.chunk_flags = 0;
|
|
ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
|
|
ecne->tsn = htonl(high_tsn);
|
|
ecne->num_pkts_since_cwr = htonl(1);
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
void
|
|
sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
|
|
struct mbuf *m, int len, int iphlen, int bad_crc)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_pktdrop_chunk *drp;
|
|
struct sctp_tmit_chunk *chk;
|
|
uint8_t *datap;
|
|
int was_trunc = 0;
|
|
int fullsz = 0;
|
|
long spc;
|
|
int offset;
|
|
struct sctp_chunkhdr *ch, chunk_buf;
|
|
unsigned int chk_length;
|
|
|
|
if (!stcb) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if (asoc->pktdrop_supported == 0) {
|
|
/*-
|
|
* peer must declare support before I send one.
|
|
*/
|
|
return;
|
|
}
|
|
if (stcb->sctp_socket == NULL) {
|
|
return;
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
len -= iphlen;
|
|
chk->send_size = len;
|
|
/* Validate that we do not have an ABORT in here. */
|
|
offset = iphlen + sizeof(struct sctphdr);
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
|
|
sizeof(*ch), (uint8_t *) & chunk_buf);
|
|
while (ch != NULL) {
|
|
chk_length = ntohs(ch->chunk_length);
|
|
if (chk_length < sizeof(*ch)) {
|
|
/* break to abort land */
|
|
break;
|
|
}
|
|
switch (ch->chunk_type) {
|
|
case SCTP_PACKET_DROPPED:
|
|
case SCTP_ABORT_ASSOCIATION:
|
|
case SCTP_INITIATION_ACK:
|
|
/**
|
|
* We don't respond with an PKT-DROP to an ABORT
|
|
* or PKT-DROP. We also do not respond to an
|
|
* INIT-ACK, because we can't know if the initiation
|
|
* tag is correct or not.
|
|
*/
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
offset += SCTP_SIZE32(chk_length);
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
|
|
sizeof(*ch), (uint8_t *) & chunk_buf);
|
|
}
|
|
|
|
if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
|
|
min(stcb->asoc.smallest_mtu, MCLBYTES)) {
|
|
/*
|
|
* only send 1 mtu worth, trim off the excess on the end.
|
|
*/
|
|
fullsz = len;
|
|
len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
|
|
was_trunc = 1;
|
|
}
|
|
chk->asoc = &stcb->asoc;
|
|
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
jump_out:
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
|
|
if (drp == NULL) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
goto jump_out;
|
|
}
|
|
chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
|
|
sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
|
|
chk->book_size_scale = 0;
|
|
if (was_trunc) {
|
|
drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
|
|
drp->trunc_len = htons(fullsz);
|
|
/*
|
|
* Len is already adjusted to size minus overhead above take
|
|
* out the pkt_drop chunk itself from it.
|
|
*/
|
|
chk->send_size = (uint16_t) (len - sizeof(struct sctp_pktdrop_chunk));
|
|
len = chk->send_size;
|
|
} else {
|
|
/* no truncation needed */
|
|
drp->ch.chunk_flags = 0;
|
|
drp->trunc_len = htons(0);
|
|
}
|
|
if (bad_crc) {
|
|
drp->ch.chunk_flags |= SCTP_BADCRC;
|
|
}
|
|
chk->send_size += sizeof(struct sctp_pktdrop_chunk);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
if (net) {
|
|
/* we should hit here */
|
|
chk->whoTo = net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
} else {
|
|
chk->whoTo = NULL;
|
|
}
|
|
drp->ch.chunk_type = SCTP_PACKET_DROPPED;
|
|
drp->ch.chunk_length = htons(chk->send_size);
|
|
spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
|
|
if (spc < 0) {
|
|
spc = 0;
|
|
}
|
|
drp->bottle_bw = htonl(spc);
|
|
if (asoc->my_rwnd) {
|
|
drp->current_onq = htonl(asoc->size_on_reasm_queue +
|
|
asoc->size_on_all_streams +
|
|
asoc->my_rwnd_control_len +
|
|
stcb->sctp_socket->so_rcv.sb_cc);
|
|
} else {
|
|
/*-
|
|
* If my rwnd is 0, possibly from mbuf depletion as well as
|
|
* space used, tell the peer there is NO space aka onq == bw
|
|
*/
|
|
drp->current_onq = htonl(spc);
|
|
}
|
|
drp->reserved = 0;
|
|
datap = drp->data;
|
|
m_copydata(m, iphlen, len, (caddr_t)datap);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
void
|
|
sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_cwr_chunk *cwr;
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
SCTP_TCB_LOCK_ASSERT(stcb);
|
|
if (net == NULL) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
|
|
if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
|
|
/* found a previous CWR queued to same destination
|
|
* update it if needed */
|
|
uint32_t ctsn;
|
|
|
|
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
|
|
ctsn = ntohl(cwr->tsn);
|
|
if (SCTP_TSN_GT(high_tsn, ctsn)) {
|
|
cwr->tsn = htonl(high_tsn);
|
|
}
|
|
if (override & SCTP_CWR_REDUCE_OVERRIDE) {
|
|
/* Make sure override is carried */
|
|
cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_ECN_CWR;
|
|
chk->rec.chunk_id.can_take_data = 1;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->send_size = sizeof(struct sctp_cwr_chunk);
|
|
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = net;
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
|
|
cwr->ch.chunk_type = SCTP_ECN_CWR;
|
|
cwr->ch.chunk_flags = override;
|
|
cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
|
|
cwr->tsn = htonl(high_tsn);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
static int
|
|
sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
|
|
uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
|
|
{
|
|
uint16_t len, old_len, i;
|
|
struct sctp_stream_reset_out_request *req_out;
|
|
struct sctp_chunkhdr *ch;
|
|
int at;
|
|
int number_entries = 0;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
/* get to new offset for the param. */
|
|
req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
|
|
(stcb->asoc.strmout[i].chunks_on_queues == 0) &&
|
|
TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
|
|
number_entries++;
|
|
}
|
|
}
|
|
if (number_entries == 0) {
|
|
return (0);
|
|
}
|
|
if (number_entries == stcb->asoc.streamoutcnt) {
|
|
number_entries = 0;
|
|
}
|
|
if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
|
|
number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
|
|
}
|
|
len = (uint16_t) (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
|
|
req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
|
|
req_out->ph.param_length = htons(len);
|
|
req_out->request_seq = htonl(seq);
|
|
req_out->response_seq = htonl(resp_seq);
|
|
req_out->send_reset_at_tsn = htonl(last_sent);
|
|
at = 0;
|
|
if (number_entries) {
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
|
|
(stcb->asoc.strmout[i].chunks_on_queues == 0) &&
|
|
TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
|
|
req_out->list_of_streams[at] = htons(i);
|
|
at++;
|
|
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
|
|
if (at >= number_entries) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
|
|
}
|
|
}
|
|
if (SCTP_SIZE32(len) > len) {
|
|
/*-
|
|
* Need to worry about the pad we may end up adding to the
|
|
* end. This is easy since the struct is either aligned to 4
|
|
* bytes or 2 bytes off.
|
|
*/
|
|
req_out->list_of_streams[number_entries] = 0;
|
|
}
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->book_size = len + old_len;
|
|
chk->book_size_scale = 0;
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
|
|
int number_entries, uint16_t * list,
|
|
uint32_t seq)
|
|
{
|
|
uint16_t len, old_len, i;
|
|
struct sctp_stream_reset_in_request *req_in;
|
|
struct sctp_chunkhdr *ch;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
|
|
/* get to new offset for the param. */
|
|
req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
len = (uint16_t) (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
|
|
req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
|
|
req_in->ph.param_length = htons(len);
|
|
req_in->request_seq = htonl(seq);
|
|
if (number_entries) {
|
|
for (i = 0; i < number_entries; i++) {
|
|
req_in->list_of_streams[i] = htons(list[i]);
|
|
}
|
|
}
|
|
if (SCTP_SIZE32(len) > len) {
|
|
/*-
|
|
* Need to worry about the pad we may end up adding to the
|
|
* end. This is easy since the struct is either aligned to 4
|
|
* bytes or 2 bytes off.
|
|
*/
|
|
req_in->list_of_streams[number_entries] = 0;
|
|
}
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->book_size = len + old_len;
|
|
chk->book_size_scale = 0;
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
return;
|
|
}
|
|
|
|
static void
|
|
sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
|
|
uint32_t seq)
|
|
{
|
|
uint16_t len, old_len;
|
|
struct sctp_stream_reset_tsn_request *req_tsn;
|
|
struct sctp_chunkhdr *ch;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
|
|
/* get to new offset for the param. */
|
|
req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
len = sizeof(struct sctp_stream_reset_tsn_request);
|
|
req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
|
|
req_tsn->ph.param_length = htons(len);
|
|
req_tsn->request_seq = htonl(seq);
|
|
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->send_size = len + old_len;
|
|
chk->book_size = SCTP_SIZE32(chk->send_size);
|
|
chk->book_size_scale = 0;
|
|
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
|
|
uint32_t resp_seq, uint32_t result)
|
|
{
|
|
uint16_t len, old_len;
|
|
struct sctp_stream_reset_response *resp;
|
|
struct sctp_chunkhdr *ch;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
|
|
/* get to new offset for the param. */
|
|
resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
len = sizeof(struct sctp_stream_reset_response);
|
|
resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
|
|
resp->ph.param_length = htons(len);
|
|
resp->response_seq = htonl(resp_seq);
|
|
resp->result = ntohl(result);
|
|
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->book_size = len + old_len;
|
|
chk->book_size_scale = 0;
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
|
|
struct sctp_stream_reset_list *ent,
|
|
int response)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_chunkhdr *ch;
|
|
|
|
asoc = &stcb->asoc;
|
|
|
|
/*
|
|
* Reset our last reset action to the new one IP -> response
|
|
* (PERFORMED probably). This assures that if we fail to send, a
|
|
* retran from the peer will get the new response.
|
|
*/
|
|
asoc->last_reset_action[0] = response;
|
|
if (asoc->stream_reset_outstanding) {
|
|
return;
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return;
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->book_size = sizeof(struct sctp_chunkhdr);
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
chk->book_size_scale = 0;
|
|
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return;
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
/* setup chunk parameters */
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
if (stcb->asoc.alternate) {
|
|
chk->whoTo = stcb->asoc.alternate;
|
|
} else {
|
|
chk->whoTo = stcb->asoc.primary_destination;
|
|
}
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
ch->chunk_type = SCTP_STREAM_RESET;
|
|
ch->chunk_flags = 0;
|
|
ch->chunk_length = htons(chk->book_size);
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
sctp_add_stream_reset_result(chk, ent->seq, response);
|
|
/* insert the chunk for sending */
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
}
|
|
|
|
void
|
|
sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
|
|
uint32_t resp_seq, uint32_t result,
|
|
uint32_t send_una, uint32_t recv_next)
|
|
{
|
|
uint16_t len, old_len;
|
|
struct sctp_stream_reset_response_tsn *resp;
|
|
struct sctp_chunkhdr *ch;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
|
|
/* get to new offset for the param. */
|
|
resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
len = sizeof(struct sctp_stream_reset_response_tsn);
|
|
resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
|
|
resp->ph.param_length = htons(len);
|
|
resp->response_seq = htonl(resp_seq);
|
|
resp->result = htonl(result);
|
|
resp->senders_next_tsn = htonl(send_una);
|
|
resp->receivers_next_tsn = htonl(recv_next);
|
|
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->book_size = len + old_len;
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
chk->book_size_scale = 0;
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
return;
|
|
}
|
|
|
|
static void
|
|
sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
|
|
uint32_t seq,
|
|
uint16_t adding)
|
|
{
|
|
uint16_t len, old_len;
|
|
struct sctp_chunkhdr *ch;
|
|
struct sctp_stream_reset_add_strm *addstr;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
|
|
/* get to new offset for the param. */
|
|
addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
len = sizeof(struct sctp_stream_reset_add_strm);
|
|
|
|
/* Fill it out. */
|
|
addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
|
|
addstr->ph.param_length = htons(len);
|
|
addstr->request_seq = htonl(seq);
|
|
addstr->number_of_streams = htons(adding);
|
|
addstr->reserved = 0;
|
|
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->send_size = len + old_len;
|
|
chk->book_size = SCTP_SIZE32(chk->send_size);
|
|
chk->book_size_scale = 0;
|
|
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
|
|
uint32_t seq,
|
|
uint16_t adding)
|
|
{
|
|
uint16_t len, old_len;
|
|
struct sctp_chunkhdr *ch;
|
|
struct sctp_stream_reset_add_strm *addstr;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
|
|
|
|
/* get to new offset for the param. */
|
|
addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
|
|
/* now how long will this param be? */
|
|
len = sizeof(struct sctp_stream_reset_add_strm);
|
|
/* Fill it out. */
|
|
addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
|
|
addstr->ph.param_length = htons(len);
|
|
addstr->request_seq = htonl(seq);
|
|
addstr->number_of_streams = htons(adding);
|
|
addstr->reserved = 0;
|
|
|
|
/* now fix the chunk length */
|
|
ch->chunk_length = htons(len + old_len);
|
|
chk->send_size = len + old_len;
|
|
chk->book_size = SCTP_SIZE32(chk->send_size);
|
|
chk->book_size_scale = 0;
|
|
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
|
|
return;
|
|
}
|
|
|
|
int
|
|
sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_chunkhdr *ch;
|
|
uint32_t seq;
|
|
|
|
asoc = &stcb->asoc;
|
|
asoc->trigger_reset = 0;
|
|
if (asoc->stream_reset_outstanding) {
|
|
return (EALREADY);
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->book_size = sizeof(struct sctp_chunkhdr);
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
chk->book_size_scale = 0;
|
|
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
|
|
/* setup chunk parameters */
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
if (stcb->asoc.alternate) {
|
|
chk->whoTo = stcb->asoc.alternate;
|
|
} else {
|
|
chk->whoTo = stcb->asoc.primary_destination;
|
|
}
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
ch->chunk_type = SCTP_STREAM_RESET;
|
|
ch->chunk_flags = 0;
|
|
ch->chunk_length = htons(chk->book_size);
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
seq = stcb->asoc.str_reset_seq_out;
|
|
if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
|
|
seq++;
|
|
asoc->stream_reset_outstanding++;
|
|
} else {
|
|
m_freem(chk->data);
|
|
chk->data = NULL;
|
|
sctp_free_a_chunk(stcb, chk, so_locked);
|
|
return (ENOENT);
|
|
}
|
|
asoc->str_reset = chk;
|
|
/* insert the chunk for sending */
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
|
|
if (stcb->asoc.send_sack) {
|
|
sctp_send_sack(stcb, so_locked);
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_send_str_reset_req(struct sctp_tcb *stcb,
|
|
uint16_t number_entries, uint16_t * list,
|
|
uint8_t send_in_req,
|
|
uint8_t send_tsn_req,
|
|
uint8_t add_stream,
|
|
uint16_t adding_o,
|
|
uint16_t adding_i, uint8_t peer_asked)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_chunkhdr *ch;
|
|
int can_send_out_req = 0;
|
|
uint32_t seq;
|
|
|
|
asoc = &stcb->asoc;
|
|
if (asoc->stream_reset_outstanding) {
|
|
/*-
|
|
* Already one pending, must get ACK back to clear the flag.
|
|
*/
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
|
|
return (EBUSY);
|
|
}
|
|
if ((send_in_req == 0) && (send_tsn_req == 0) &&
|
|
(add_stream == 0)) {
|
|
/* nothing to do */
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
if (send_tsn_req && send_in_req) {
|
|
/* error, can't do that */
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
} else if (send_in_req) {
|
|
can_send_out_req = 1;
|
|
}
|
|
if (number_entries > (MCLBYTES -
|
|
SCTP_MIN_OVERHEAD -
|
|
sizeof(struct sctp_chunkhdr) -
|
|
sizeof(struct sctp_stream_reset_out_request)) /
|
|
sizeof(uint16_t)) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->book_size = sizeof(struct sctp_chunkhdr);
|
|
chk->send_size = SCTP_SIZE32(chk->book_size);
|
|
chk->book_size_scale = 0;
|
|
|
|
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
return (ENOMEM);
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
|
|
/* setup chunk parameters */
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
if (stcb->asoc.alternate) {
|
|
chk->whoTo = stcb->asoc.alternate;
|
|
} else {
|
|
chk->whoTo = stcb->asoc.primary_destination;
|
|
}
|
|
atomic_add_int(&chk->whoTo->ref_count, 1);
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
ch->chunk_type = SCTP_STREAM_RESET;
|
|
ch->chunk_flags = 0;
|
|
ch->chunk_length = htons(chk->book_size);
|
|
SCTP_BUF_LEN(chk->data) = chk->send_size;
|
|
|
|
seq = stcb->asoc.str_reset_seq_out;
|
|
if (can_send_out_req) {
|
|
int ret;
|
|
|
|
ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
|
|
if (ret) {
|
|
seq++;
|
|
asoc->stream_reset_outstanding++;
|
|
}
|
|
}
|
|
if ((add_stream & 1) &&
|
|
((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
|
|
/* Need to allocate more */
|
|
struct sctp_stream_out *oldstream;
|
|
struct sctp_stream_queue_pending *sp, *nsp;
|
|
int i;
|
|
#if defined(SCTP_DETAILED_STR_STATS)
|
|
int j;
|
|
#endif
|
|
|
|
oldstream = stcb->asoc.strmout;
|
|
/* get some more */
|
|
SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
|
|
(stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
|
|
SCTP_M_STRMO);
|
|
if (stcb->asoc.strmout == NULL) {
|
|
uint8_t x;
|
|
|
|
stcb->asoc.strmout = oldstream;
|
|
/* Turn off the bit */
|
|
x = add_stream & 0xfe;
|
|
add_stream = x;
|
|
goto skip_stuff;
|
|
}
|
|
/*
|
|
* Ok now we proceed with copying the old out stuff and
|
|
* initializing the new stuff.
|
|
*/
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
|
|
stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
|
|
stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
|
|
stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
|
|
stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
|
|
stcb->asoc.strmout[i].sid = i;
|
|
stcb->asoc.strmout[i].state = oldstream[i].state;
|
|
/* FIX ME FIX ME */
|
|
/* This should be a SS_COPY operation FIX ME STREAM
|
|
* SCHEDULER EXPERT */
|
|
stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
|
|
/* now anything on those queues? */
|
|
TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
|
|
TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
|
|
}
|
|
|
|
}
|
|
/* now the new streams */
|
|
stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
|
|
for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
|
|
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
|
|
stcb->asoc.strmout[i].chunks_on_queues = 0;
|
|
#if defined(SCTP_DETAILED_STR_STATS)
|
|
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
|
|
stcb->asoc.strmout[i].abandoned_sent[j] = 0;
|
|
stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
|
|
}
|
|
#else
|
|
stcb->asoc.strmout[i].abandoned_sent[0] = 0;
|
|
stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
|
|
#endif
|
|
stcb->asoc.strmout[i].next_mid_ordered = 0;
|
|
stcb->asoc.strmout[i].next_mid_unordered = 0;
|
|
stcb->asoc.strmout[i].sid = i;
|
|
stcb->asoc.strmout[i].last_msg_incomplete = 0;
|
|
stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
|
|
stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
|
|
}
|
|
stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
|
|
SCTP_FREE(oldstream, SCTP_M_STRMO);
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
}
|
|
skip_stuff:
|
|
if ((add_stream & 1) && (adding_o > 0)) {
|
|
asoc->strm_pending_add_size = adding_o;
|
|
asoc->peer_req_out = peer_asked;
|
|
sctp_add_an_out_stream(chk, seq, adding_o);
|
|
seq++;
|
|
asoc->stream_reset_outstanding++;
|
|
}
|
|
if ((add_stream & 2) && (adding_i > 0)) {
|
|
sctp_add_an_in_stream(chk, seq, adding_i);
|
|
seq++;
|
|
asoc->stream_reset_outstanding++;
|
|
}
|
|
if (send_in_req) {
|
|
sctp_add_stream_reset_in(chk, number_entries, list, seq);
|
|
seq++;
|
|
asoc->stream_reset_outstanding++;
|
|
}
|
|
if (send_tsn_req) {
|
|
sctp_add_stream_reset_tsn(chk, seq);
|
|
asoc->stream_reset_outstanding++;
|
|
}
|
|
asoc->str_reset = chk;
|
|
/* insert the chunk for sending */
|
|
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
asoc->ctrl_queue_cnt++;
|
|
if (stcb->asoc.send_sack) {
|
|
sctp_send_sack(stcb, SCTP_SO_LOCKED);
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
|
|
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
/* Don't respond to an ABORT with an ABORT. */
|
|
if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
|
|
if (cause)
|
|
sctp_m_freem(cause);
|
|
return;
|
|
}
|
|
sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
return;
|
|
}
|
|
|
|
void
|
|
sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
|
|
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
return;
|
|
}
|
|
|
|
static struct mbuf *
|
|
sctp_copy_resume(struct uio *uio,
|
|
int max_send_len,
|
|
int user_marks_eor,
|
|
int *error,
|
|
uint32_t * sndout,
|
|
struct mbuf **new_tail)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
|
|
(M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
|
|
if (m == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
|
|
*error = ENOBUFS;
|
|
} else {
|
|
*sndout = m_length(m, NULL);
|
|
*new_tail = m_last(m);
|
|
}
|
|
return (m);
|
|
}
|
|
|
|
static int
|
|
sctp_copy_one(struct sctp_stream_queue_pending *sp,
|
|
struct uio *uio,
|
|
int resv_upfront)
|
|
{
|
|
sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
|
|
resv_upfront, 0);
|
|
if (sp->data == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
|
|
return (ENOBUFS);
|
|
}
|
|
sp->tail_mbuf = m_last(sp->data);
|
|
return (0);
|
|
}
|
|
|
|
|
|
|
|
static struct sctp_stream_queue_pending *
|
|
sctp_copy_it_in(struct sctp_tcb *stcb,
|
|
struct sctp_association *asoc,
|
|
struct sctp_sndrcvinfo *srcv,
|
|
struct uio *uio,
|
|
struct sctp_nets *net,
|
|
int max_send_len,
|
|
int user_marks_eor,
|
|
int *error)
|
|
{
|
|
/*-
|
|
* This routine must be very careful in its work. Protocol
|
|
* processing is up and running so care must be taken to spl...()
|
|
* when you need to do something that may effect the stcb/asoc. The
|
|
* sb is locked however. When data is copied the protocol processing
|
|
* should be enabled since this is a slower operation...
|
|
*/
|
|
struct sctp_stream_queue_pending *sp = NULL;
|
|
int resv_in_first;
|
|
|
|
*error = 0;
|
|
/* Now can we send this? */
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
/* got data while shutting down */
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
|
|
*error = ECONNRESET;
|
|
goto out_now;
|
|
}
|
|
sctp_alloc_a_strmoq(stcb, sp);
|
|
if (sp == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
*error = ENOMEM;
|
|
goto out_now;
|
|
}
|
|
sp->act_flags = 0;
|
|
sp->sender_all_done = 0;
|
|
sp->sinfo_flags = srcv->sinfo_flags;
|
|
sp->timetolive = srcv->sinfo_timetolive;
|
|
sp->ppid = srcv->sinfo_ppid;
|
|
sp->context = srcv->sinfo_context;
|
|
sp->fsn = 0;
|
|
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
|
|
|
|
sp->sid = srcv->sinfo_stream;
|
|
sp->length = (uint32_t) min(uio->uio_resid, max_send_len);
|
|
if ((sp->length == (uint32_t) uio->uio_resid) &&
|
|
((user_marks_eor == 0) ||
|
|
(srcv->sinfo_flags & SCTP_EOF) ||
|
|
(user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
|
|
sp->msg_is_complete = 1;
|
|
} else {
|
|
sp->msg_is_complete = 0;
|
|
}
|
|
sp->sender_all_done = 0;
|
|
sp->some_taken = 0;
|
|
sp->put_last_out = 0;
|
|
resv_in_first = sizeof(struct sctp_data_chunk);
|
|
sp->data = sp->tail_mbuf = NULL;
|
|
if (sp->length == 0) {
|
|
*error = 0;
|
|
goto skip_copy;
|
|
}
|
|
if (srcv->sinfo_keynumber_valid) {
|
|
sp->auth_keyid = srcv->sinfo_keynumber;
|
|
} else {
|
|
sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
|
|
}
|
|
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
|
|
sctp_auth_key_acquire(stcb, sp->auth_keyid);
|
|
sp->holds_key_ref = 1;
|
|
}
|
|
*error = sctp_copy_one(sp, uio, resv_in_first);
|
|
skip_copy:
|
|
if (*error) {
|
|
sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
|
|
sp = NULL;
|
|
} else {
|
|
if (sp->sinfo_flags & SCTP_ADDR_OVER) {
|
|
sp->net = net;
|
|
atomic_add_int(&sp->net->ref_count, 1);
|
|
} else {
|
|
sp->net = NULL;
|
|
}
|
|
sctp_set_prsctp_policy(sp);
|
|
}
|
|
out_now:
|
|
return (sp);
|
|
}
|
|
|
|
|
|
int
|
|
sctp_sosend(struct socket *so,
|
|
struct sockaddr *addr,
|
|
struct uio *uio,
|
|
struct mbuf *top,
|
|
struct mbuf *control,
|
|
int flags,
|
|
struct thread *p
|
|
)
|
|
{
|
|
int error, use_sndinfo = 0;
|
|
struct sctp_sndrcvinfo sndrcvninfo;
|
|
struct sockaddr *addr_to_use;
|
|
#if defined(INET) && defined(INET6)
|
|
struct sockaddr_in sin;
|
|
#endif
|
|
|
|
if (control) {
|
|
/* process cmsg snd/rcv info (maybe a assoc-id) */
|
|
if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
|
|
sizeof(sndrcvninfo))) {
|
|
/* got one */
|
|
use_sndinfo = 1;
|
|
}
|
|
}
|
|
addr_to_use = addr;
|
|
#if defined(INET) && defined(INET6)
|
|
if ((addr) && (addr->sa_family == AF_INET6)) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)addr;
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
|
|
in6_sin6_2_sin(&sin, sin6);
|
|
addr_to_use = (struct sockaddr *)&sin;
|
|
}
|
|
}
|
|
#endif
|
|
error = sctp_lower_sosend(so, addr_to_use, uio, top,
|
|
control,
|
|
flags,
|
|
use_sndinfo ? &sndrcvninfo : NULL
|
|
,p
|
|
);
|
|
return (error);
|
|
}
|
|
|
|
|
|
int
|
|
sctp_lower_sosend(struct socket *so,
|
|
struct sockaddr *addr,
|
|
struct uio *uio,
|
|
struct mbuf *i_pak,
|
|
struct mbuf *control,
|
|
int flags,
|
|
struct sctp_sndrcvinfo *srcv
|
|
,
|
|
struct thread *p
|
|
)
|
|
{
|
|
unsigned int sndlen = 0, max_len;
|
|
int error, len;
|
|
struct mbuf *top = NULL;
|
|
int queue_only = 0, queue_only_for_init = 0;
|
|
int free_cnt_applied = 0;
|
|
int un_sent;
|
|
int now_filled = 0;
|
|
unsigned int inqueue_bytes = 0;
|
|
struct sctp_block_entry be;
|
|
struct sctp_inpcb *inp;
|
|
struct sctp_tcb *stcb = NULL;
|
|
struct timeval now;
|
|
struct sctp_nets *net;
|
|
struct sctp_association *asoc;
|
|
struct sctp_inpcb *t_inp;
|
|
int user_marks_eor;
|
|
int create_lock_applied = 0;
|
|
int nagle_applies = 0;
|
|
int some_on_control = 0;
|
|
int got_all_of_the_send = 0;
|
|
int hold_tcblock = 0;
|
|
int non_blocking = 0;
|
|
uint32_t local_add_more, local_soresv = 0;
|
|
uint16_t port;
|
|
uint16_t sinfo_flags;
|
|
sctp_assoc_t sinfo_assoc_id;
|
|
|
|
error = 0;
|
|
net = NULL;
|
|
stcb = NULL;
|
|
asoc = NULL;
|
|
|
|
t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
|
|
if (inp == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
if (i_pak) {
|
|
SCTP_RELEASE_PKT(i_pak);
|
|
}
|
|
return (error);
|
|
}
|
|
if ((uio == NULL) && (i_pak == NULL)) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
|
|
atomic_add_int(&inp->total_sends, 1);
|
|
if (uio) {
|
|
if (uio->uio_resid < 0) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
sndlen = (unsigned int)uio->uio_resid;
|
|
} else {
|
|
top = SCTP_HEADER_TO_CHAIN(i_pak);
|
|
sndlen = SCTP_HEADER_LEN(i_pak);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
|
|
(void *)addr,
|
|
sndlen);
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
|
|
(inp->sctp_socket->so_qlimit)) {
|
|
/* The listener can NOT send */
|
|
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
|
|
error = ENOTCONN;
|
|
goto out_unlocked;
|
|
}
|
|
/**
|
|
* Pre-screen address, if one is given the sin-len
|
|
* must be set correctly!
|
|
*/
|
|
if (addr) {
|
|
union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
|
|
|
|
switch (raddr->sa.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
port = raddr->sin.sin_port;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
port = raddr->sin6.sin6_port;
|
|
break;
|
|
#endif
|
|
default:
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
|
|
error = EAFNOSUPPORT;
|
|
goto out_unlocked;
|
|
}
|
|
} else
|
|
port = 0;
|
|
|
|
if (srcv) {
|
|
sinfo_flags = srcv->sinfo_flags;
|
|
sinfo_assoc_id = srcv->sinfo_assoc_id;
|
|
if (INVALID_SINFO_FLAG(sinfo_flags) ||
|
|
PR_SCTP_INVALID_POLICY(sinfo_flags)) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
if (srcv->sinfo_flags)
|
|
SCTP_STAT_INCR(sctps_sends_with_flags);
|
|
} else {
|
|
sinfo_flags = inp->def_send.sinfo_flags;
|
|
sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
|
|
}
|
|
if (sinfo_flags & SCTP_SENDALL) {
|
|
/* its a sendall */
|
|
error = sctp_sendall(inp, uio, top, srcv);
|
|
top = NULL;
|
|
goto out_unlocked;
|
|
}
|
|
if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
/* now we must find the assoc */
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
SCTP_INP_RLOCK(inp);
|
|
stcb = LIST_FIRST(&inp->sctp_asoc_list);
|
|
if (stcb) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
} else if (sinfo_assoc_id) {
|
|
stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
|
|
if (stcb != NULL) {
|
|
hold_tcblock = 1;
|
|
}
|
|
} else if (addr) {
|
|
/*-
|
|
* Since we did not use findep we must
|
|
* increment it, and if we don't find a tcb
|
|
* decrement it.
|
|
*/
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_INCR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
|
|
if (stcb == NULL) {
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
} else {
|
|
hold_tcblock = 1;
|
|
}
|
|
}
|
|
if ((stcb == NULL) && (addr)) {
|
|
/* Possible implicit send? */
|
|
SCTP_ASOC_CREATE_LOCK(inp);
|
|
create_lock_applied = 1;
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
|
|
/* Should I really unlock ? */
|
|
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
|
|
}
|
|
if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
|
|
(addr->sa_family == AF_INET6)) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_INCR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
/* With the lock applied look again */
|
|
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
|
|
if ((stcb == NULL) && (control != NULL) && (port > 0)) {
|
|
stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
|
|
}
|
|
if (stcb == NULL) {
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
} else {
|
|
hold_tcblock = 1;
|
|
}
|
|
if (error) {
|
|
goto out_unlocked;
|
|
}
|
|
if (t_inp != inp) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
|
|
error = ENOTCONN;
|
|
goto out_unlocked;
|
|
}
|
|
}
|
|
if (stcb == NULL) {
|
|
if (addr == NULL) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
|
|
error = ENOENT;
|
|
goto out_unlocked;
|
|
} else {
|
|
/* We must go ahead and start the INIT process */
|
|
uint32_t vrf_id;
|
|
|
|
if ((sinfo_flags & SCTP_ABORT) ||
|
|
((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
|
|
/*-
|
|
* User asks to abort a non-existant assoc,
|
|
* or EOF a non-existant assoc with no data
|
|
*/
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
|
|
error = ENOENT;
|
|
goto out_unlocked;
|
|
}
|
|
/* get an asoc/stcb struct */
|
|
vrf_id = inp->def_vrf_id;
|
|
#ifdef INVARIANTS
|
|
if (create_lock_applied == 0) {
|
|
panic("Error, should hold create lock and I don't?");
|
|
}
|
|
#endif
|
|
stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
|
|
inp->sctp_ep.pre_open_stream_count,
|
|
inp->sctp_ep.port,
|
|
p);
|
|
if (stcb == NULL) {
|
|
/* Error is setup for us in the call */
|
|
goto out_unlocked;
|
|
}
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
|
|
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
|
|
/* Set the connected flag so we can queue
|
|
* data */
|
|
soisconnecting(so);
|
|
}
|
|
hold_tcblock = 1;
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
} else {
|
|
SCTP_PRINTF("Huh-3? create lock should have been on??\n");
|
|
}
|
|
/* Turn on queue only flag to prevent data from
|
|
* being sent */
|
|
queue_only = 1;
|
|
asoc = &stcb->asoc;
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
|
|
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
|
|
|
|
/* initialize authentication params for the assoc */
|
|
sctp_initialize_auth_params(inp, stcb);
|
|
|
|
if (control) {
|
|
if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
|
|
sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
|
|
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
|
|
hold_tcblock = 0;
|
|
stcb = NULL;
|
|
goto out_unlocked;
|
|
}
|
|
}
|
|
/* out with the INIT */
|
|
queue_only_for_init = 1;
|
|
/*-
|
|
* we may want to dig in after this call and adjust the MTU
|
|
* value. It defaulted to 1500 (constant) but the ro
|
|
* structure may now have an update and thus we may need to
|
|
* change it BEFORE we append the message.
|
|
*/
|
|
}
|
|
} else
|
|
asoc = &stcb->asoc;
|
|
if (srcv == NULL)
|
|
srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
|
|
if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
|
|
if (addr)
|
|
net = sctp_findnet(stcb, addr);
|
|
else
|
|
net = NULL;
|
|
if ((net == NULL) ||
|
|
((port != 0) && (port != stcb->rport))) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
} else {
|
|
if (stcb->asoc.alternate) {
|
|
net = stcb->asoc.alternate;
|
|
} else {
|
|
net = stcb->asoc.primary_destination;
|
|
}
|
|
}
|
|
atomic_add_int(&stcb->total_sends, 1);
|
|
/* Keep the stcb from being freed under our feet */
|
|
atomic_add_int(&asoc->refcnt, 1);
|
|
free_cnt_applied = 1;
|
|
|
|
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
|
|
if (sndlen > asoc->smallest_mtu) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
|
|
error = EMSGSIZE;
|
|
goto out_unlocked;
|
|
}
|
|
}
|
|
if (SCTP_SO_IS_NBIO(so)
|
|
|| (flags & MSG_NBIO)
|
|
) {
|
|
non_blocking = 1;
|
|
}
|
|
/* would we block? */
|
|
if (non_blocking) {
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
|
|
if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
|
|
(stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
|
|
if (sndlen > SCTP_SB_LIMIT_SND(so))
|
|
error = EMSGSIZE;
|
|
else
|
|
error = EWOULDBLOCK;
|
|
goto out_unlocked;
|
|
}
|
|
stcb->asoc.sb_send_resv += sndlen;
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
hold_tcblock = 0;
|
|
} else {
|
|
atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
|
|
}
|
|
local_soresv = sndlen;
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
|
|
error = ECONNRESET;
|
|
goto out_unlocked;
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
create_lock_applied = 0;
|
|
}
|
|
/* Is the stream no. valid? */
|
|
if (srcv->sinfo_stream >= asoc->streamoutcnt) {
|
|
/* Invalid stream number */
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
|
|
(asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
|
|
/*
|
|
* Can't queue any data while stream reset is underway.
|
|
*/
|
|
if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
|
|
error = EAGAIN;
|
|
} else {
|
|
error = EINVAL;
|
|
}
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
|
|
goto out_unlocked;
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
queue_only = 1;
|
|
}
|
|
/* we are now done with all control */
|
|
if (control) {
|
|
sctp_m_freem(control);
|
|
control = NULL;
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
|
|
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
|
|
if (srcv->sinfo_flags & SCTP_ABORT) {
|
|
;
|
|
} else {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
|
|
error = ECONNRESET;
|
|
goto out_unlocked;
|
|
}
|
|
}
|
|
/* Ok, we will attempt a msgsnd :> */
|
|
if (p) {
|
|
p->td_ru.ru_msgsnd++;
|
|
}
|
|
/* Are we aborting? */
|
|
if (srcv->sinfo_flags & SCTP_ABORT) {
|
|
struct mbuf *mm;
|
|
int tot_demand, tot_out = 0, max_out;
|
|
|
|
SCTP_STAT_INCR(sctps_sends_with_abort);
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
/* It has to be up before we abort */
|
|
/* how big is the user initiated abort? */
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (hold_tcblock) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
hold_tcblock = 0;
|
|
}
|
|
if (top) {
|
|
struct mbuf *cntm = NULL;
|
|
|
|
mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
|
|
if (sndlen != 0) {
|
|
for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
|
|
tot_out += SCTP_BUF_LEN(cntm);
|
|
}
|
|
}
|
|
} else {
|
|
/* Must fit in a MTU */
|
|
tot_out = sndlen;
|
|
tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
|
|
if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
|
|
/* To big */
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
|
|
error = EMSGSIZE;
|
|
goto out;
|
|
}
|
|
mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
|
|
}
|
|
if (mm == NULL) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
|
|
error = ENOMEM;
|
|
goto out;
|
|
}
|
|
max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
|
|
max_out -= sizeof(struct sctp_abort_msg);
|
|
if (tot_out > max_out) {
|
|
tot_out = max_out;
|
|
}
|
|
if (mm) {
|
|
struct sctp_paramhdr *ph;
|
|
|
|
/* now move forward the data pointer */
|
|
ph = mtod(mm, struct sctp_paramhdr *);
|
|
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + tot_out));
|
|
ph++;
|
|
SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
|
|
if (top == NULL) {
|
|
error = uiomove((caddr_t)ph, (int)tot_out, uio);
|
|
if (error) {
|
|
/*-
|
|
* Here if we can't get his data we
|
|
* still abort we just don't get to
|
|
* send the users note :-0
|
|
*/
|
|
sctp_m_freem(mm);
|
|
mm = NULL;
|
|
}
|
|
} else {
|
|
if (sndlen != 0) {
|
|
SCTP_BUF_NEXT(mm) = top;
|
|
}
|
|
}
|
|
}
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
free_cnt_applied = 0;
|
|
/* release this lock, otherwise we hang on ourselves */
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
|
|
/* now relock the stcb so everything is sane */
|
|
hold_tcblock = 0;
|
|
stcb = NULL;
|
|
/*
|
|
* In this case top is already chained to mm avoid double
|
|
* free, since we free it below if top != NULL and driver
|
|
* would free it after sending the packet out
|
|
*/
|
|
if (sndlen != 0) {
|
|
top = NULL;
|
|
}
|
|
goto out_unlocked;
|
|
}
|
|
/* Calculate the maximum we can send */
|
|
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
|
|
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
|
|
if (non_blocking) {
|
|
/* we already checked for non-blocking above. */
|
|
max_len = sndlen;
|
|
} else {
|
|
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
|
|
}
|
|
} else {
|
|
max_len = 0;
|
|
}
|
|
if (hold_tcblock) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
hold_tcblock = 0;
|
|
}
|
|
if (asoc->strmout == NULL) {
|
|
/* huh? software error */
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
|
|
error = EFAULT;
|
|
goto out_unlocked;
|
|
}
|
|
/* Unless E_EOR mode is on, we must make a send FIT in one call. */
|
|
if ((user_marks_eor == 0) &&
|
|
(sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
|
|
/* It will NEVER fit */
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
|
|
error = EMSGSIZE;
|
|
goto out_unlocked;
|
|
}
|
|
if ((uio == NULL) && user_marks_eor) {
|
|
/*-
|
|
* We do not support eeor mode for
|
|
* sending with mbuf chains (like sendfile).
|
|
*/
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
if (user_marks_eor) {
|
|
local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
|
|
} else {
|
|
/*-
|
|
* For non-eeor the whole message must fit in
|
|
* the socket send buffer.
|
|
*/
|
|
local_add_more = sndlen;
|
|
}
|
|
len = 0;
|
|
if (non_blocking) {
|
|
goto skip_preblock;
|
|
}
|
|
if (((max_len <= local_add_more) &&
|
|
(SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
|
|
(max_len == 0) ||
|
|
((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
|
|
/* No room right now ! */
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
|
|
while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
|
|
((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
|
|
(unsigned int)SCTP_SB_LIMIT_SND(so),
|
|
inqueue_bytes,
|
|
local_add_more,
|
|
stcb->asoc.stream_queue_cnt,
|
|
stcb->asoc.chunks_on_out_queue,
|
|
SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
|
|
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
|
|
}
|
|
be.error = 0;
|
|
stcb->block_entry = &be;
|
|
error = sbwait(&so->so_snd);
|
|
stcb->block_entry = NULL;
|
|
if (error || so->so_error || be.error) {
|
|
if (error == 0) {
|
|
if (so->so_error)
|
|
error = so->so_error;
|
|
if (be.error) {
|
|
error = be.error;
|
|
}
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto out_unlocked;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
|
|
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
|
|
asoc, stcb->asoc.total_output_queue_size);
|
|
}
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto out_unlocked;
|
|
}
|
|
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
|
|
}
|
|
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
|
|
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
|
|
} else {
|
|
max_len = 0;
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
}
|
|
skip_preblock:
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
goto out_unlocked;
|
|
}
|
|
/*
|
|
* sndlen covers for mbuf case uio_resid covers for the non-mbuf
|
|
* case NOTE: uio will be null when top/mbuf is passed
|
|
*/
|
|
if (sndlen == 0) {
|
|
if (srcv->sinfo_flags & SCTP_EOF) {
|
|
got_all_of_the_send = 1;
|
|
goto dataless_eof;
|
|
} else {
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (top == NULL) {
|
|
struct sctp_stream_queue_pending *sp;
|
|
struct sctp_stream_out *strm;
|
|
uint32_t sndout;
|
|
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
if ((asoc->stream_locked) &&
|
|
(asoc->stream_locked_on != srcv->sinfo_stream)) {
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
|
|
strm = &stcb->asoc.strmout[srcv->sinfo_stream];
|
|
if (strm->last_msg_incomplete == 0) {
|
|
do_a_copy_in:
|
|
sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
|
|
if ((sp == NULL) || (error)) {
|
|
goto out;
|
|
}
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
if (sp->msg_is_complete) {
|
|
strm->last_msg_incomplete = 0;
|
|
asoc->stream_locked = 0;
|
|
} else {
|
|
/*
|
|
* Just got locked to this guy in case of an
|
|
* interrupt.
|
|
*/
|
|
strm->last_msg_incomplete = 1;
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
asoc->stream_locked = 1;
|
|
asoc->stream_locked_on = srcv->sinfo_stream;
|
|
}
|
|
sp->sender_all_done = 0;
|
|
}
|
|
sctp_snd_sb_alloc(stcb, sp->length);
|
|
atomic_add_int(&asoc->stream_queue_cnt, 1);
|
|
if (srcv->sinfo_flags & SCTP_UNORDERED) {
|
|
SCTP_STAT_INCR(sctps_sends_with_unord);
|
|
}
|
|
TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
|
|
stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
} else {
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
if (sp == NULL) {
|
|
/* ???? Huh ??? last msg is gone */
|
|
#ifdef INVARIANTS
|
|
panic("Warning: Last msg marked incomplete, yet nothing left?");
|
|
#else
|
|
SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
|
|
strm->last_msg_incomplete = 0;
|
|
#endif
|
|
goto do_a_copy_in;
|
|
|
|
}
|
|
}
|
|
while (uio->uio_resid > 0) {
|
|
/* How much room do we have? */
|
|
struct mbuf *new_tail, *mm;
|
|
|
|
if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
|
|
max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
|
|
else
|
|
max_len = 0;
|
|
|
|
if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
|
|
(max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
|
|
(uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
|
|
sndout = 0;
|
|
new_tail = NULL;
|
|
if (hold_tcblock) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
hold_tcblock = 0;
|
|
}
|
|
mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
|
|
if ((mm == NULL) || error) {
|
|
if (mm) {
|
|
sctp_m_freem(mm);
|
|
}
|
|
goto out;
|
|
}
|
|
/* Update the mbuf and count */
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
/*
|
|
* we need to get out. Peer probably
|
|
* aborted.
|
|
*/
|
|
sctp_m_freem(mm);
|
|
if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
|
|
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
|
|
error = ECONNRESET;
|
|
}
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
goto out;
|
|
}
|
|
if (sp->tail_mbuf) {
|
|
/* tack it to the end */
|
|
SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
|
|
sp->tail_mbuf = new_tail;
|
|
} else {
|
|
/* A stolen mbuf */
|
|
sp->data = mm;
|
|
sp->tail_mbuf = new_tail;
|
|
}
|
|
sctp_snd_sb_alloc(stcb, sndout);
|
|
atomic_add_int(&sp->length, sndout);
|
|
len += sndout;
|
|
if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
|
|
sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
|
|
}
|
|
/* Did we reach EOR? */
|
|
if ((uio->uio_resid == 0) &&
|
|
((user_marks_eor == 0) ||
|
|
(srcv->sinfo_flags & SCTP_EOF) ||
|
|
(user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
|
|
sp->msg_is_complete = 1;
|
|
} else {
|
|
sp->msg_is_complete = 0;
|
|
}
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
}
|
|
if (uio->uio_resid == 0) {
|
|
/* got it all? */
|
|
continue;
|
|
}
|
|
/* PR-SCTP? */
|
|
if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
|
|
/* This is ugly but we must assure locking
|
|
* order */
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
|
|
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
|
|
if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
|
|
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
|
|
else
|
|
max_len = 0;
|
|
if (max_len > 0) {
|
|
continue;
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
hold_tcblock = 0;
|
|
}
|
|
/* wait for space now */
|
|
if (non_blocking) {
|
|
/* Non-blocking io in place out */
|
|
goto skip_out_eof;
|
|
}
|
|
/* What about the INIT, send it maybe */
|
|
if (queue_only_for_init) {
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
|
|
/* a collision took us forward? */
|
|
queue_only = 0;
|
|
} else {
|
|
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
|
|
queue_only = 1;
|
|
}
|
|
}
|
|
if ((net->flight_size > net->cwnd) &&
|
|
(asoc->sctp_cmt_on_off == 0)) {
|
|
SCTP_STAT_INCR(sctps_send_cwnd_avoid);
|
|
queue_only = 1;
|
|
} else if (asoc->ifp_had_enobuf) {
|
|
SCTP_STAT_INCR(sctps_ifnomemqueued);
|
|
if (net->flight_size > (2 * net->mtu)) {
|
|
queue_only = 1;
|
|
}
|
|
asoc->ifp_had_enobuf = 0;
|
|
}
|
|
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
|
|
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
|
|
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
|
|
(stcb->asoc.total_flight > 0) &&
|
|
(stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
|
|
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
|
|
|
|
/*-
|
|
* Ok, Nagle is set on and we have data outstanding.
|
|
* Don't send anything and let SACKs drive out the
|
|
* data unless we have a "full" segment to send.
|
|
*/
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
|
|
sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
|
|
}
|
|
SCTP_STAT_INCR(sctps_naglequeued);
|
|
nagle_applies = 1;
|
|
} else {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
|
|
if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
|
|
sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
|
|
}
|
|
SCTP_STAT_INCR(sctps_naglesent);
|
|
nagle_applies = 0;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
|
|
|
|
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
|
|
nagle_applies, un_sent);
|
|
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
|
|
stcb->asoc.total_flight,
|
|
stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
|
|
}
|
|
if (queue_only_for_init)
|
|
queue_only_for_init = 0;
|
|
if ((queue_only == 0) && (nagle_applies == 0)) {
|
|
/*-
|
|
* need to start chunk output
|
|
* before blocking.. note that if
|
|
* a lock is already applied, then
|
|
* the input via the net is happening
|
|
* and I don't need to start output :-D
|
|
*/
|
|
if (hold_tcblock == 0) {
|
|
if (SCTP_TCB_TRYLOCK(stcb)) {
|
|
hold_tcblock = 1;
|
|
sctp_chunk_output(inp,
|
|
stcb,
|
|
SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
|
|
}
|
|
} else {
|
|
sctp_chunk_output(inp,
|
|
stcb,
|
|
SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
|
|
}
|
|
if (hold_tcblock == 1) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
hold_tcblock = 0;
|
|
}
|
|
}
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
/*-
|
|
* This is a bit strange, but I think it will
|
|
* work. The total_output_queue_size is locked and
|
|
* protected by the TCB_LOCK, which we just released.
|
|
* There is a race that can occur between releasing it
|
|
* above, and me getting the socket lock, where sacks
|
|
* come in but we have not put the SB_WAIT on the
|
|
* so_snd buffer to get the wakeup. After the LOCK
|
|
* is applied the sack_processing will also need to
|
|
* LOCK the so->so_snd to do the actual sowwakeup(). So
|
|
* once we have the socket buffer lock if we recheck the
|
|
* size we KNOW we will get to sleep safely with the
|
|
* wakeup flag in place.
|
|
*/
|
|
if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
|
|
min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
|
|
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
|
|
asoc, (size_t)uio->uio_resid);
|
|
}
|
|
be.error = 0;
|
|
stcb->block_entry = &be;
|
|
error = sbwait(&so->so_snd);
|
|
stcb->block_entry = NULL;
|
|
|
|
if (error || so->so_error || be.error) {
|
|
if (error == 0) {
|
|
if (so->so_error)
|
|
error = so->so_error;
|
|
if (be.error) {
|
|
error = be.error;
|
|
}
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto out_unlocked;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
|
|
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
|
|
asoc, stcb->asoc.total_output_queue_size);
|
|
}
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
goto out_unlocked;
|
|
}
|
|
}
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
goto out_unlocked;
|
|
}
|
|
if (sp) {
|
|
if (sp->msg_is_complete == 0) {
|
|
strm->last_msg_incomplete = 1;
|
|
if (stcb->asoc.idata_supported == 0) {
|
|
asoc->stream_locked = 1;
|
|
asoc->stream_locked_on = srcv->sinfo_stream;
|
|
}
|
|
} else {
|
|
sp->sender_all_done = 1;
|
|
strm->last_msg_incomplete = 0;
|
|
asoc->stream_locked = 0;
|
|
}
|
|
} else {
|
|
SCTP_PRINTF("Huh no sp TSNH?\n");
|
|
strm->last_msg_incomplete = 0;
|
|
asoc->stream_locked = 0;
|
|
}
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
if (uio->uio_resid == 0) {
|
|
got_all_of_the_send = 1;
|
|
}
|
|
} else {
|
|
/* We send in a 0, since we do NOT have any locks */
|
|
error = sctp_msg_append(stcb, net, top, srcv, 0);
|
|
top = NULL;
|
|
if (srcv->sinfo_flags & SCTP_EOF) {
|
|
/*
|
|
* This should only happen for Panda for the mbuf
|
|
* send case, which does NOT yet support EEOR mode.
|
|
* Thus, we can just set this flag to do the proper
|
|
* EOF handling.
|
|
*/
|
|
got_all_of_the_send = 1;
|
|
}
|
|
}
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
dataless_eof:
|
|
/* EOF thing ? */
|
|
if ((srcv->sinfo_flags & SCTP_EOF) &&
|
|
(got_all_of_the_send == 1)) {
|
|
SCTP_STAT_INCR(sctps_sends_with_eof);
|
|
error = 0;
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
if (TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->sent_queue) &&
|
|
sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
|
|
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
|
|
goto abort_anyway;
|
|
}
|
|
/* there is nothing queued to send, so I'm done... */
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
struct sctp_nets *netp;
|
|
|
|
/* only send SHUTDOWN the first time through */
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
|
|
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
|
|
sctp_stop_timers_for_shutdown(stcb);
|
|
if (stcb->asoc.alternate) {
|
|
netp = stcb->asoc.alternate;
|
|
} else {
|
|
netp = stcb->asoc.primary_destination;
|
|
}
|
|
sctp_send_shutdown(stcb, netp);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
|
|
netp);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
}
|
|
} else {
|
|
/*-
|
|
* we still got (or just got) data to send, so set
|
|
* SHUTDOWN_PENDING
|
|
*/
|
|
/*-
|
|
* XXX sockets draft says that SCTP_EOF should be
|
|
* sent with no data. currently, we will allow user
|
|
* data to be sent first and move to
|
|
* SHUTDOWN-PENDING
|
|
*/
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
|
|
asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
|
|
}
|
|
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
|
|
if (TAILQ_EMPTY(&asoc->send_queue) &&
|
|
TAILQ_EMPTY(&asoc->sent_queue) &&
|
|
(asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
|
|
struct mbuf *op_err;
|
|
char msg[SCTP_DIAG_INFO_LEN];
|
|
|
|
abort_anyway:
|
|
if (free_cnt_applied) {
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
free_cnt_applied = 0;
|
|
}
|
|
snprintf(msg, sizeof(msg),
|
|
"%s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb,
|
|
op_err, SCTP_SO_LOCKED);
|
|
/* now relock the stcb so everything
|
|
* is sane */
|
|
hold_tcblock = 0;
|
|
stcb = NULL;
|
|
goto out;
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
|
|
}
|
|
}
|
|
}
|
|
skip_out_eof:
|
|
if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
|
|
some_on_control = 1;
|
|
}
|
|
if (queue_only_for_init) {
|
|
if (hold_tcblock == 0) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
hold_tcblock = 1;
|
|
}
|
|
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
|
|
/* a collision took us forward? */
|
|
queue_only = 0;
|
|
} else {
|
|
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
|
|
SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
|
|
queue_only = 1;
|
|
}
|
|
}
|
|
if ((net->flight_size > net->cwnd) &&
|
|
(stcb->asoc.sctp_cmt_on_off == 0)) {
|
|
SCTP_STAT_INCR(sctps_send_cwnd_avoid);
|
|
queue_only = 1;
|
|
} else if (asoc->ifp_had_enobuf) {
|
|
SCTP_STAT_INCR(sctps_ifnomemqueued);
|
|
if (net->flight_size > (2 * net->mtu)) {
|
|
queue_only = 1;
|
|
}
|
|
asoc->ifp_had_enobuf = 0;
|
|
}
|
|
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
|
|
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
|
|
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
|
|
(stcb->asoc.total_flight > 0) &&
|
|
(stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
|
|
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
|
|
/*-
|
|
* Ok, Nagle is set on and we have data outstanding.
|
|
* Don't send anything and let SACKs drive out the
|
|
* data unless wen have a "full" segment to send.
|
|
*/
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
|
|
sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
|
|
}
|
|
SCTP_STAT_INCR(sctps_naglequeued);
|
|
nagle_applies = 1;
|
|
} else {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
|
|
if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
|
|
sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
|
|
}
|
|
SCTP_STAT_INCR(sctps_naglesent);
|
|
nagle_applies = 0;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
|
|
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
|
|
nagle_applies, un_sent);
|
|
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
|
|
stcb->asoc.total_flight,
|
|
stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
|
|
}
|
|
if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
|
|
/* we can attempt to send too. */
|
|
if (hold_tcblock == 0) {
|
|
/* If there is activity recv'ing sacks no need to
|
|
* send */
|
|
if (SCTP_TCB_TRYLOCK(stcb)) {
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
|
|
hold_tcblock = 1;
|
|
}
|
|
} else {
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
|
|
}
|
|
} else if ((queue_only == 0) &&
|
|
(stcb->asoc.peers_rwnd == 0) &&
|
|
(stcb->asoc.total_flight == 0)) {
|
|
/* We get to have a probe outstanding */
|
|
if (hold_tcblock == 0) {
|
|
hold_tcblock = 1;
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
|
|
} else if (some_on_control) {
|
|
int num_out, reason, frag_point;
|
|
|
|
/* Here we do control only */
|
|
if (hold_tcblock == 0) {
|
|
hold_tcblock = 1;
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
|
|
(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
|
|
&reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
|
|
queue_only, stcb->asoc.peers_rwnd, un_sent,
|
|
stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
|
|
stcb->asoc.total_output_queue_size, error);
|
|
|
|
out:
|
|
out_unlocked:
|
|
|
|
if (local_soresv && stcb) {
|
|
atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
|
|
}
|
|
if (create_lock_applied) {
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
}
|
|
if ((stcb) && hold_tcblock) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
if (stcb && free_cnt_applied) {
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
}
|
|
#ifdef INVARIANTS
|
|
if (stcb) {
|
|
if (mtx_owned(&stcb->tcb_mtx)) {
|
|
panic("Leaving with tcb mtx owned?");
|
|
}
|
|
if (mtx_owned(&stcb->tcb_send_mtx)) {
|
|
panic("Leaving with tcb send mtx owned?");
|
|
}
|
|
}
|
|
#endif
|
|
if (top) {
|
|
sctp_m_freem(top);
|
|
}
|
|
if (control) {
|
|
sctp_m_freem(control);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* generate an AUTHentication chunk, if required
|
|
*/
|
|
struct mbuf *
|
|
sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
|
|
struct sctp_auth_chunk **auth_ret, uint32_t * offset,
|
|
struct sctp_tcb *stcb, uint8_t chunk)
|
|
{
|
|
struct mbuf *m_auth;
|
|
struct sctp_auth_chunk *auth;
|
|
int chunk_len;
|
|
struct mbuf *cn;
|
|
|
|
if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
|
|
(stcb == NULL))
|
|
return (m);
|
|
|
|
if (stcb->asoc.auth_supported == 0) {
|
|
return (m);
|
|
}
|
|
/* does the requested chunk require auth? */
|
|
if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
|
|
return (m);
|
|
}
|
|
m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
|
|
if (m_auth == NULL) {
|
|
/* no mbuf's */
|
|
return (m);
|
|
}
|
|
/* reserve some space if this will be the first mbuf */
|
|
if (m == NULL)
|
|
SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
|
|
/* fill in the AUTH chunk details */
|
|
auth = mtod(m_auth, struct sctp_auth_chunk *);
|
|
bzero(auth, sizeof(*auth));
|
|
auth->ch.chunk_type = SCTP_AUTHENTICATION;
|
|
auth->ch.chunk_flags = 0;
|
|
chunk_len = sizeof(*auth) +
|
|
sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
|
|
auth->ch.chunk_length = htons(chunk_len);
|
|
auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
|
|
/* key id and hmac digest will be computed and filled in upon send */
|
|
|
|
/* save the offset where the auth was inserted into the chain */
|
|
*offset = 0;
|
|
for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
|
|
*offset += SCTP_BUF_LEN(cn);
|
|
}
|
|
|
|
/* update length and return pointer to the auth chunk */
|
|
SCTP_BUF_LEN(m_auth) = chunk_len;
|
|
m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
|
|
if (auth_ret != NULL)
|
|
*auth_ret = auth;
|
|
|
|
return (m);
|
|
}
|
|
|
|
#ifdef INET6
|
|
int
|
|
sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
|
|
{
|
|
struct nd_prefix *pfx = NULL;
|
|
struct nd_pfxrouter *pfxrtr = NULL;
|
|
struct sockaddr_in6 gw6;
|
|
|
|
if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
|
|
return (0);
|
|
|
|
/* get prefix entry of address */
|
|
ND6_RLOCK();
|
|
LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
|
|
if (pfx->ndpr_stateflags & NDPRF_DETACHED)
|
|
continue;
|
|
if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
|
|
&src6->sin6_addr, &pfx->ndpr_mask))
|
|
break;
|
|
}
|
|
/* no prefix entry in the prefix list */
|
|
if (pfx == NULL) {
|
|
ND6_RUNLOCK();
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
|
|
return (0);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
|
|
|
|
/* search installed gateway from prefix entry */
|
|
LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
|
|
memset(&gw6, 0, sizeof(struct sockaddr_in6));
|
|
gw6.sin6_family = AF_INET6;
|
|
gw6.sin6_len = sizeof(struct sockaddr_in6);
|
|
memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
|
|
sizeof(struct in6_addr));
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
|
|
if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
|
|
ND6_RUNLOCK();
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
|
|
return (1);
|
|
}
|
|
}
|
|
ND6_RUNLOCK();
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
|
|
{
|
|
#ifdef INET
|
|
struct sockaddr_in *sin, *mask;
|
|
struct ifaddr *ifa;
|
|
struct in_addr srcnetaddr, gwnetaddr;
|
|
|
|
if (ro == NULL || ro->ro_rt == NULL ||
|
|
sifa->address.sa.sa_family != AF_INET) {
|
|
return (0);
|
|
}
|
|
ifa = (struct ifaddr *)sifa->ifa;
|
|
mask = (struct sockaddr_in *)(ifa->ifa_netmask);
|
|
sin = &sifa->address.sin;
|
|
srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
|
|
|
|
sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
|
|
gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
|
|
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
|
|
SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
|
|
if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
|
|
return (1);
|
|
}
|
|
#endif
|
|
return (0);
|
|
}
|