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freebsd-skq/sys/netinet/sctp_output.c
markj 85037a09f3 Support MSG_DONTWAIT in send*(2). 
As it does for recv*(2), MSG_DONTWAIT indicates that the call should
not block, returning EAGAIN instead.  Linux and OpenBSD both implement
this, so the change makes porting easier, especially since we do not
return EINVAL or so when unrecognized flags are specified.

Submitted by:	Greg V <greg@unrelenting.technology>
Reviewed by:	tuexen
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D18728
2019-01-04 17:31:50 +00:00

13853 lines
361 KiB
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <netinet/sctp_os.h>
#include <sys/proc.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_header.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_auth.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_indata.h>
#include <netinet/sctp_bsd_addr.h>
#include <netinet/sctp_input.h>
#include <netinet/sctp_crc32.h>
#if defined(INET) || defined(INET6)
#include <netinet/udp.h>
#endif
#include <netinet/udp_var.h>
#include <machine/in_cksum.h>
#include <netinet/in_kdtrace.h>
#define SCTP_MAX_GAPS_INARRAY 4
struct sack_track {
uint8_t right_edge; /* mergable on the right edge */
uint8_t left_edge; /* mergable on the left edge */
uint8_t num_entries;
uint8_t spare;
struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
};
const struct sack_track sack_array[256] = {
{0, 0, 0, 0, /* 0x00 */
{{0, 0},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x01 */
{{0, 0},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x02 */
{{1, 1},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x03 */
{{0, 1},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x04 */
{{2, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x05 */
{{0, 0},
{2, 2},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x06 */
{{1, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x07 */
{{0, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x08 */
{{3, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x09 */
{{0, 0},
{3, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x0a */
{{1, 1},
{3, 3},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x0b */
{{0, 1},
{3, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x0c */
{{2, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x0d */
{{0, 0},
{2, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x0e */
{{1, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x0f */
{{0, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x10 */
{{4, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x11 */
{{0, 0},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x12 */
{{1, 1},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x13 */
{{0, 1},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x14 */
{{2, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x15 */
{{0, 0},
{2, 2},
{4, 4},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x16 */
{{1, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x17 */
{{0, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x18 */
{{3, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x19 */
{{0, 0},
{3, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x1a */
{{1, 1},
{3, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x1b */
{{0, 1},
{3, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x1c */
{{2, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x1d */
{{0, 0},
{2, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x1e */
{{1, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x1f */
{{0, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x20 */
{{5, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x21 */
{{0, 0},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x22 */
{{1, 1},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x23 */
{{0, 1},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x24 */
{{2, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x25 */
{{0, 0},
{2, 2},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x26 */
{{1, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x27 */
{{0, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x28 */
{{3, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x29 */
{{0, 0},
{3, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x2a */
{{1, 1},
{3, 3},
{5, 5},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x2b */
{{0, 1},
{3, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x2c */
{{2, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x2d */
{{0, 0},
{2, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x2e */
{{1, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x2f */
{{0, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x30 */
{{4, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x31 */
{{0, 0},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x32 */
{{1, 1},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x33 */
{{0, 1},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x34 */
{{2, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x35 */
{{0, 0},
{2, 2},
{4, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x36 */
{{1, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x37 */
{{0, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x38 */
{{3, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x39 */
{{0, 0},
{3, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x3a */
{{1, 1},
{3, 5},
{0, 0},
{0, 0}
}
},
{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 *paramh;
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 */
paramh = (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);
paramh = 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 *)paramh;
paramh->param_type = htons(SCTP_IPV4_ADDRESS);
paramh->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 *)paramh;
paramh->param_type = htons(SCTP_IPV6_ADDRESS);
paramh->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;
struct sctp_sndinfo sndinfo;
struct sctp_prinfo prinfo;
struct sctp_authinfo authinfo;
int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
int found;
/*
* Independent of how many mbufs, find the c_type inside the control
* structure and copy out the data.
*/
found = 0;
tot_len = SCTP_BUF_LEN(control);
for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
rem_len = tot_len - off;
if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
/* There is not enough room for one more. */
return (found);
}
m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
/* We dont't have a complete CMSG header. */
return (found);
}
if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
/* We don't have the complete CMSG. */
return (found);
}
cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
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 (cpsize > INT_MAX) {
return (found);
}
if (cmsg_data_len < (int)cpsize) {
return (found);
}
/* It is exactly what we want. Copy it out. */
m_copydata(control, cmsg_data_off, (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 (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
return (found);
}
m_copydata(control, cmsg_data_off, 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 (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
return (found);
}
m_copydata(control, cmsg_data_off, 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 (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
return (found);
}
m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
sndrcvinfo->sinfo_keynumber_valid = 1;
sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
break;
default:
return (found);
}
found = 1;
}
}
}
return (found);
}
static int
sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
{
struct cmsghdr cmh;
struct sctp_initmsg initmsg;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
tot_len = SCTP_BUF_LEN(control);
for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
rem_len = tot_len - off;
if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
/* There is not enough room for one more. */
*error = EINVAL;
return (1);
}
m_copydata(control, off, 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 ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
/* We don't have the complete CMSG. */
*error = EINVAL;
return (1);
}
cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
if (cmh.cmsg_level == IPPROTO_SCTP) {
switch (cmh.cmsg_type) {
case SCTP_INIT:
if (cmsg_data_len < (int)sizeof(struct sctp_initmsg)) {
*error = EINVAL;
return (1);
}
m_copydata(control, cmsg_data_off, 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 (cmsg_data_len < (int)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, cmsg_data_off, 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 (cmsg_data_len < (int)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, cmsg_data_off, 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;
}
}
}
return (0);
}
#if defined(INET) || defined(INET6)
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;
struct sctp_tcb *stcb;
struct sockaddr *addr;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
tot_len = SCTP_BUF_LEN(control);
for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
rem_len = tot_len - off;
if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
/* There is not enough room for one more. */
*error = EINVAL;
return (NULL);
}
m_copydata(control, off, 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 ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
/* We don't have the complete CMSG. */
*error = EINVAL;
return (NULL);
}
cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
if (cmh.cmsg_level == IPPROTO_SCTP) {
switch (cmh.cmsg_type) {
#ifdef INET
case SCTP_DSTADDRV4:
if (cmsg_data_len < (int)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, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
addr = (struct sockaddr *)&sin;
break;
#endif
#ifdef INET6
case SCTP_DSTADDRV6:
if (cmsg_data_len < (int)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, cmsg_data_off, 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);
}
}
}
}
return (NULL);
}
#endif
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) {
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
m->m_pkthdr.csum_flags = CSUM_SCTP;
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
#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_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
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
if (port) {
UDPSTAT_INC(udps_opackets);
}
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 {
if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
uint32_t mtu;
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
if (mtu > 0) {
if (net->port) {
mtu -= sizeof(struct udphdr);
}
if ((stcb != NULL) && (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);
sctp_m_freem(m);
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 = htons((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.
*/
memset(&lsa6_tmp, 0, 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);
sctp_m_freem(m);
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);
sctp_m_freem(m);
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.
*/
memset(&lsa6_storage, 0, 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) {
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
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 {
m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
/* 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_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
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);
if (port) {
UDPSTAT_INC(udps_opackets);
}
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) &&
((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
uint32_t mtu;
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
if (mtu > 0) {
if (net->port) {
mtu -= sizeof(struct udphdr);
}
if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
}
net->mtu = mtu;
}
} 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 error;
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");
if ((error = 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, "Gak send error %d\n", error);
if (error == ENOBUFS) {
stcb->asoc.ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
stcb->asoc.ifp_had_enobuf = 0;
}
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;
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, &params, 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 += sizeof(struct sctp_gen_error_cause);
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,
* SCTP, and chunk header.
*/
#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_gen_error_cause cause;
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;
}
cause.code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
cause.length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
m_copyback(op_err, err_at, sizeof(struct sctp_gen_error_cause), (caddr_t)&cause);
err_at += sizeof(struct sctp_gen_error_cause);
SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
if (SCTP_BUF_NEXT(op_err) == NULL) {
sctp_m_freem(op_err);
return (NULL);
}
}
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 += 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((uint16_t)sizeof(struct sctp_paramhdr) + plen);
m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)&s);
err_at += sizeof(struct sctp_paramhdr);
SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
if (SCTP_BUF_NEXT(op_err) == 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;
}
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, &params, 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, &params, 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;
if (plen != sizeof(struct sctp_ipv4addr_param)) {
return (1);
}
phdr = sctp_get_next_param(in_initpkt, offset,
(struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
if (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;
if (plen != sizeof(struct sctp_ipv6addr_param)) {
return (1);
}
phdr = sctp_get_next_param(in_initpkt, offset,
(struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
if (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, &params, 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)
{
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;
struct timeval now;
#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;
int error;
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(stcb) != 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(&now);
stc.time_entered.tv_sec = now.tv_sec;
stc.time_entered.tv_usec = now.tv_usec;
/* 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(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
(SCTP_GET_STATE(stcb) == 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 (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 {
SCTP_INP_INCR_REF(inp);
SCTP_INP_RUNLOCK(inp);
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));
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;
}
if ((error = 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))) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
if (error == ENOBUFS) {
if (asoc != NULL) {
asoc->ifp_had_enobuf = 1;
}
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
if (asoc != NULL) {
asoc->ifp_had_enobuf = 0;
}
}
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;
}
ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
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) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(SCTP_GET_STATE(stcb) == 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(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
/*
* only send SHUTDOWN the first time
* through
*/
if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
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(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
}
SCTP_ADD_SUBSTATE(stcb, 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 * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
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);
asoc->ctrl_queue_cnt--;
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
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);
asoc->ctrl_queue_cnt--;
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
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);
asoc->ctrl_queue_cnt--;
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
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 uint32_t
sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
uint32_t space_left, 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 (space_left >= 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 (space_left);
}
}
/*-
* 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 <= space_left) ||
((length - space_left) < 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 space_left. Do we wish
* to split it for the sake of packet putting together?
*/
if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
/* Its ok to split it */
return (min(space_left, 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 space_left,
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 deferred 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, space_left, 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);
}
leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
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, 1, 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);
}
}
SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), 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;
}
sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
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;
uint32_t space_left, moved, total_moved;
int bail, giveup;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
total_moved = 0;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
space_left = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
/* TSNH */
space_left = net->mtu;
break;
}
/* Need an allowance for the data chunk header too */
space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
/* must make even word boundary */
space_left &= 0xfffffffc;
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
giveup = 0;
bail = 0;
while ((space_left > 0) && (strq != NULL)) {
moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
&giveup, eeor_mode, &bail, so_locked);
stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
if ((giveup != 0) || (bail != 0)) {
break;
}
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
total_moved += moved;
space_left -= moved;
if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
} else {
space_left = 0;
}
space_left &= 0xfffffffc;
}
if (bail != 0)
*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) ||
(SCTP_GET_STATE(stcb) == 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(stcb) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(stcb) == 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)) {
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) {
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 = 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->rec.chunk_id.id = SCTP_OPERATION_ERROR;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 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;
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 param, *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, &param, sizeof(param));
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->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->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))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
return (error);
} else {
asoc->ifp_had_enobuf = 0;
}
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(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
(SCTP_GET_STATE(stcb) == 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 */
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
return (error);
} else {
asoc->ifp_had_enobuf = 0;
}
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;
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;
int error;
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;
}
}
if ((error = 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))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
stcb->asoc.ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
stcb->asoc.ifp_had_enobuf = 0;
}
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;
int error;
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);
if ((error = 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))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
stcb->asoc.ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
stcb->asoc.ifp_had_enobuf = 0;
}
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;
#endif
int ret, 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 = htons(IP_DF);
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) {
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
mout->m_pkthdr.csum_flags = CSUM_SCTP;
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(o_pak);
}
#endif
SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
break;
#endif
#ifdef INET6
case AF_INET6:
ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
if (port) {
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
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 {
mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(o_pak);
}
#endif
SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
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;
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
if (port) {
UDPSTAT_INC(udps_opackets);
}
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
if (ret) {
SCTP_STAT_INCR(sctps_senderrors);
}
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(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(SCTP_GET_STATE(stcb) == 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 = SCTP_DATA_CHUNK_OVERHEAD(stcb);
sp->data = sp->tail_mbuf = NULL;
if (sp->length == 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) &&
SCTP_IS_LISTENING(inp)) {
/* 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 defined(INET) || defined(INET6)
if ((stcb == NULL) && (control != NULL) && (port > 0)) {
stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
}
#endif
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(stcb, 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 | MSG_DONTWAIT)) != 0
) {
non_blocking = 1;
}
/* would we block? */
if (non_blocking) {
uint32_t amount;
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 * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (user_marks_eor == 0) {
amount = sndlen;
} else {
amount = 1;
}
if ((SCTP_SB_LIMIT_SND(so) < (amount + 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(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == 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(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(SCTP_GET_STATE(stcb) == 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(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == 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 * SCTP_DATA_CHUNK_OVERHEAD(stcb));
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 * SCTP_DATA_CHUNK_OVERHEAD(stcb));
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 * SCTP_DATA_CHUNK_OVERHEAD(stcb));
}
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 (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;
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
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 * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
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) == SCTP_STATE_OPEN) {
/* a collision took us forward? */
queue_only = 0;
} else {
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
SCTP_SET_STATE(stcb, 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;
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.
*/
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
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(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
struct sctp_nets *netp;
/* only send SHUTDOWN the first time through */
if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
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(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != 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)) {
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
}
SCTP_ADD_SUBSTATE(stcb, 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) == SCTP_STATE_OPEN) {
/* a collision took us forward? */
queue_only = 0;
} else {
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
SCTP_SET_STATE(stcb, 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;
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 *);
memset(auth, 0, 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);
}
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