761 lines
21 KiB
C
761 lines
21 KiB
C
/* Copyright (c) 2001 NETLAB, Temple University
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* Copyright (c) 2001 Protocol Engineering Lab, University of Delaware
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*
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* Jerry Heinz <gheinz@astro.temple.edu>
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* John Fiore <jfiore@joda.cis.temple.edu>
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* Armando L. Caro Jr. <acaro@cis.udel.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h" /* must come after interface.h */
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#include "ip.h"
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#ifdef INET6
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#include "ip6.h"
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#endif
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/* Definitions from:
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*
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* SCTP reference Implementation Copyright (C) 1999 Cisco And Motorola
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of Cisco nor of Motorola may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the SCTP reference Implementation
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*
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*
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* Please send any bug reports or fixes you make to one of the following email
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* addresses:
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*
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* rstewar1@email.mot.com
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* kmorneau@cisco.com
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* qxie1@email.mot.com
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorperated into the next SCTP release.
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*/
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/* The valid defines for all message
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* types know to SCTP. 0 is reserved
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*/
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#define SCTP_DATA 0x00
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#define SCTP_INITIATION 0x01
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#define SCTP_INITIATION_ACK 0x02
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#define SCTP_SELECTIVE_ACK 0x03
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#define SCTP_HEARTBEAT_REQUEST 0x04
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#define SCTP_HEARTBEAT_ACK 0x05
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#define SCTP_ABORT_ASSOCIATION 0x06
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#define SCTP_SHUTDOWN 0x07
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#define SCTP_SHUTDOWN_ACK 0x08
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#define SCTP_OPERATION_ERR 0x09
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#define SCTP_COOKIE_ECHO 0x0a
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#define SCTP_COOKIE_ACK 0x0b
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#define SCTP_ECN_ECHO 0x0c
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#define SCTP_ECN_CWR 0x0d
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#define SCTP_SHUTDOWN_COMPLETE 0x0e
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#define SCTP_FORWARD_CUM_TSN 0xc0
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#define SCTP_RELIABLE_CNTL 0xc1
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#define SCTP_RELIABLE_CNTL_ACK 0xc2
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static const struct tok sctp_chunkid_str[] = {
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{ SCTP_DATA, "DATA" },
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{ SCTP_INITIATION, "INIT" },
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{ SCTP_INITIATION_ACK, "INIT ACK" },
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{ SCTP_SELECTIVE_ACK, "SACK" },
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{ SCTP_HEARTBEAT_REQUEST, "HB REQ" },
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{ SCTP_HEARTBEAT_ACK, "HB ACK" },
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{ SCTP_ABORT_ASSOCIATION, "ABORT" },
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{ SCTP_SHUTDOWN, "SHUTDOWN" },
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{ SCTP_SHUTDOWN_ACK, "SHUTDOWN ACK" },
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{ SCTP_OPERATION_ERR, "OP ERR" },
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{ SCTP_COOKIE_ECHO, "COOKIE ECHO" },
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{ SCTP_COOKIE_ACK, "COOKIE ACK" },
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{ SCTP_ECN_ECHO, "ECN ECHO" },
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{ SCTP_ECN_CWR, "ECN CWR" },
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{ SCTP_SHUTDOWN_COMPLETE, "SHUTDOWN COMPLETE" },
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{ SCTP_FORWARD_CUM_TSN, "FOR CUM TSN" },
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{ SCTP_RELIABLE_CNTL, "REL CTRL" },
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{ SCTP_RELIABLE_CNTL_ACK, "REL CTRL ACK" },
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{ 0, NULL }
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};
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/* Data Chuck Specific Flags */
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#define SCTP_DATA_FRAG_MASK 0x03
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#define SCTP_DATA_MIDDLE_FRAG 0x00
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#define SCTP_DATA_LAST_FRAG 0x01
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#define SCTP_DATA_FIRST_FRAG 0x02
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#define SCTP_DATA_NOT_FRAG 0x03
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#define SCTP_DATA_UNORDERED 0x04
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#define SCTP_ADDRMAX 60
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#define CHAN_HP 6704
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#define CHAN_MP 6705
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#define CHAN_LP 6706
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/* the sctp common header */
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struct sctpHeader{
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uint16_t source;
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uint16_t destination;
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uint32_t verificationTag;
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uint32_t adler32;
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};
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/* various descriptor parsers */
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struct sctpChunkDesc{
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uint8_t chunkID;
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uint8_t chunkFlg;
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uint16_t chunkLength;
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};
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struct sctpParamDesc{
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uint16_t paramType;
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uint16_t paramLength;
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};
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struct sctpRelChunkDesc{
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struct sctpChunkDesc chk;
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uint32_t serialNumber;
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};
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struct sctpVendorSpecificParam {
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struct sctpParamDesc p; /* type must be 0xfffe */
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uint32_t vendorId; /* vendor ID from RFC 1700 */
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uint16_t vendorSpecificType;
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uint16_t vendorSpecificLen;
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};
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/* Structures for the control parts */
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/* Sctp association init request/ack */
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/* this is used for init ack, too */
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struct sctpInitiation{
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uint32_t initTag; /* tag of mine */
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uint32_t rcvWindowCredit; /* rwnd */
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uint16_t NumPreopenStreams; /* OS */
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uint16_t MaxInboundStreams; /* MIS */
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uint32_t initialTSN;
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/* optional param's follow in sctpParamDesc form */
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};
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struct sctpV4IpAddress{
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struct sctpParamDesc p; /* type is set to SCTP_IPV4_PARAM_TYPE, len=10 */
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uint32_t ipAddress;
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};
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struct sctpV6IpAddress{
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struct sctpParamDesc p; /* type is set to SCTP_IPV6_PARAM_TYPE, len=22 */
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uint8_t ipAddress[16];
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};
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struct sctpDNSName{
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struct sctpParamDesc param;
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uint8_t name[1];
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};
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struct sctpCookiePreserve{
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struct sctpParamDesc p; /* type is set to SCTP_COOKIE_PRESERVE, len=8 */
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uint32_t extraTime;
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};
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struct sctpTimeStamp{
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uint32_t ts_sec;
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uint32_t ts_usec;
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};
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/* wire structure of my cookie */
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struct cookieMessage{
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uint32_t TieTag_curTag; /* copied from assoc if present */
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uint32_t TieTag_hisTag; /* copied from assoc if present */
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int32_t cookieLife; /* life I will award this cookie */
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struct sctpTimeStamp timeEnteringState; /* the time I built cookie */
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struct sctpInitiation initAckISent; /* the INIT-ACK that I sent to my peer */
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uint32_t addressWhereISent[4]; /* I make this 4 ints so I get 128bits for future */
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int32_t addrtype; /* address type */
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uint16_t locScope; /* V6 local scope flag */
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uint16_t siteScope; /* V6 site scope flag */
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/* at the end is tacked on the INIT chunk sent in
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* its entirety and of course our
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* signature.
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*/
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};
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/* this guy is for use when
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* I have a initiate message gloming the
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* things together.
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*/
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struct sctpUnifiedInit{
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struct sctpChunkDesc uh;
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struct sctpInitiation initm;
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};
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struct sctpSendableInit{
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struct sctpHeader mh;
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struct sctpUnifiedInit msg;
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};
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/* Selective Acknowledgement
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* has the following structure with
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* a optional ammount of trailing int's
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* on the last part (based on the numberOfDesc
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* field).
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*/
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struct sctpSelectiveAck{
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uint32_t highestConseqTSN;
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uint32_t updatedRwnd;
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uint16_t numberOfdesc;
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uint16_t numDupTsns;
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};
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struct sctpSelectiveFrag{
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uint16_t fragmentStart;
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uint16_t fragmentEnd;
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};
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struct sctpUnifiedSack{
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struct sctpChunkDesc uh;
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struct sctpSelectiveAck sack;
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};
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/* for both RTT request/response the
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* following is sent
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*/
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struct sctpHBrequest {
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uint32_t time_value_1;
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uint32_t time_value_2;
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};
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/* here is what I read and respond with to. */
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struct sctpHBunified{
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struct sctpChunkDesc hdr;
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struct sctpParamDesc hb;
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};
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/* here is what I send */
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struct sctpHBsender{
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struct sctpChunkDesc hdr;
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struct sctpParamDesc hb;
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struct sctpHBrequest rtt;
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int8_t addrFmt[SCTP_ADDRMAX];
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uint16_t userreq;
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};
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/* for the abort and shutdown ACK
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* we must carry the init tag in the common header. Just the
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* common header is all that is needed with a chunk descriptor.
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*/
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struct sctpUnifiedAbort{
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struct sctpChunkDesc uh;
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};
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struct sctpUnifiedAbortLight{
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struct sctpHeader mh;
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struct sctpChunkDesc uh;
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};
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struct sctpUnifiedAbortHeavy{
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struct sctpHeader mh;
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struct sctpChunkDesc uh;
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uint16_t causeCode;
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uint16_t causeLen;
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};
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/* For the graceful shutdown we must carry
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* the tag (in common header) and the highest consequitive acking value
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*/
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struct sctpShutdown {
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uint32_t TSN_Seen;
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};
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struct sctpUnifiedShutdown{
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struct sctpChunkDesc uh;
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struct sctpShutdown shut;
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};
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/* in the unified message we add the trailing
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* stream id since it is the only message
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* that is defined as a operation error.
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*/
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struct sctpOpErrorCause{
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uint16_t cause;
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uint16_t causeLen;
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};
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struct sctpUnifiedOpError{
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struct sctpChunkDesc uh;
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struct sctpOpErrorCause c;
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};
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struct sctpUnifiedStreamError{
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struct sctpHeader mh;
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struct sctpChunkDesc uh;
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struct sctpOpErrorCause c;
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uint16_t strmNum;
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uint16_t reserved;
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};
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struct staleCookieMsg{
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struct sctpHeader mh;
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struct sctpChunkDesc uh;
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struct sctpOpErrorCause c;
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uint32_t moretime;
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};
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/* the following is used in all sends
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* where nothing is needed except the
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* chunk/type i.e. shutdownAck Abort */
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struct sctpUnifiedSingleMsg{
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struct sctpHeader mh;
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struct sctpChunkDesc uh;
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};
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struct sctpDataPart{
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uint32_t TSN;
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uint16_t streamId;
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uint16_t sequence;
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uint32_t payloadtype;
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};
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struct sctpUnifiedDatagram{
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struct sctpChunkDesc uh;
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struct sctpDataPart dp;
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};
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struct sctpECN_echo{
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struct sctpChunkDesc uh;
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uint32_t Lowest_TSN;
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};
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struct sctpCWR{
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struct sctpChunkDesc uh;
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uint32_t TSN_reduced_at;
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};
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static const struct tok ForCES_channels[] = {
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{ CHAN_HP, "ForCES HP" },
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{ CHAN_MP, "ForCES MP" },
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{ CHAN_LP, "ForCES LP" },
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{ 0, NULL }
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};
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/* data chunk's payload protocol identifiers */
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#define SCTP_PPID_IUA 1
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#define SCTP_PPID_M2UA 2
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#define SCTP_PPID_M3UA 3
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#define SCTP_PPID_SUA 4
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#define SCTP_PPID_M2PA 5
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#define SCTP_PPID_V5UA 6
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#define SCTP_PPID_H248 7
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#define SCTP_PPID_BICC 8
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#define SCTP_PPID_TALI 9
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#define SCTP_PPID_DUA 10
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#define SCTP_PPID_ASAP 11
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#define SCTP_PPID_ENRP 12
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#define SCTP_PPID_H323 13
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#define SCTP_PPID_QIPC 14
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#define SCTP_PPID_SIMCO 15
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#define SCTP_PPID_DDPSC 16
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#define SCTP_PPID_DDPSSC 17
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#define SCTP_PPID_S1AP 18
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#define SCTP_PPID_RUA 19
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#define SCTP_PPID_HNBAP 20
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#define SCTP_PPID_FORCES_HP 21
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#define SCTP_PPID_FORCES_MP 22
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#define SCTP_PPID_FORCES_LP 23
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#define SCTP_PPID_SBC_AP 24
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#define SCTP_PPID_NBAP 25
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/* 26 */
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#define SCTP_PPID_X2AP 27
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static const struct tok PayloadProto_idents[] = {
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{ SCTP_PPID_IUA, "ISDN Q.921" },
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{ SCTP_PPID_M2UA, "M2UA" },
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{ SCTP_PPID_M3UA, "M3UA" },
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{ SCTP_PPID_SUA, "SUA" },
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{ SCTP_PPID_M2PA, "M2PA" },
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{ SCTP_PPID_V5UA, "V5.2" },
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{ SCTP_PPID_H248, "H.248" },
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{ SCTP_PPID_BICC, "BICC" },
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{ SCTP_PPID_TALI, "TALI" },
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{ SCTP_PPID_DUA, "DUA" },
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{ SCTP_PPID_ASAP, "ASAP" },
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{ SCTP_PPID_ENRP, "ENRP" },
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{ SCTP_PPID_H323, "H.323" },
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{ SCTP_PPID_QIPC, "Q.IPC" },
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{ SCTP_PPID_SIMCO, "SIMCO" },
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{ SCTP_PPID_DDPSC, "DDPSC" },
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{ SCTP_PPID_DDPSSC, "DDPSSC" },
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{ SCTP_PPID_S1AP, "S1AP" },
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{ SCTP_PPID_RUA, "RUA" },
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{ SCTP_PPID_HNBAP, "HNBAP" },
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{ SCTP_PPID_FORCES_HP, "ForCES HP" },
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{ SCTP_PPID_FORCES_MP, "ForCES MP" },
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{ SCTP_PPID_FORCES_LP, "ForCES LP" },
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{ SCTP_PPID_SBC_AP, "SBc-AP" },
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{ SCTP_PPID_NBAP, "NBAP" },
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/* 26 */
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{ SCTP_PPID_X2AP, "X2AP" },
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{ 0, NULL }
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};
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static inline int isForCES_port(u_short Port)
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{
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if (Port == CHAN_HP)
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return 1;
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if (Port == CHAN_MP)
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return 1;
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if (Port == CHAN_LP)
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return 1;
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return 0;
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}
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void sctp_print(netdissect_options *ndo,
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const u_char *bp, /* beginning of sctp packet */
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const u_char *bp2, /* beginning of enclosing */
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u_int sctpPacketLength) /* ip packet */
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{
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const struct sctpHeader *sctpPktHdr;
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const struct ip *ip;
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#ifdef INET6
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const struct ip6_hdr *ip6;
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#endif
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const void *endPacketPtr;
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u_short sourcePort, destPort;
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int chunkCount;
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const struct sctpChunkDesc *chunkDescPtr;
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const void *nextChunk;
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|
const char *sep;
|
|
int isforces = 0;
|
|
|
|
|
|
sctpPktHdr = (const struct sctpHeader*) bp;
|
|
endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength;
|
|
|
|
if( (u_long) endPacketPtr > (u_long) ndo->ndo_snapend)
|
|
endPacketPtr = (const void *) ndo->ndo_snapend;
|
|
ip = (struct ip *)bp2;
|
|
#ifdef INET6
|
|
if (IP_V(ip) == 6)
|
|
ip6 = (const struct ip6_hdr *)bp2;
|
|
else
|
|
ip6 = NULL;
|
|
#endif /*INET6*/
|
|
ND_TCHECK(*sctpPktHdr);
|
|
|
|
if (sctpPacketLength < sizeof(struct sctpHeader))
|
|
{
|
|
ND_PRINT((ndo, "truncated-sctp - %ld bytes missing!",
|
|
(long)sctpPacketLength-sizeof(struct sctpHeader)));
|
|
return;
|
|
}
|
|
|
|
/* sctpPacketLength -= sizeof(struct sctpHeader); packet length */
|
|
/* is now only as long as the payload */
|
|
|
|
sourcePort = EXTRACT_16BITS(&sctpPktHdr->source);
|
|
destPort = EXTRACT_16BITS(&sctpPktHdr->destination);
|
|
|
|
#ifdef INET6
|
|
if (ip6) {
|
|
ND_PRINT((ndo, "%s.%d > %s.%d: sctp",
|
|
ip6addr_string(ndo, &ip6->ip6_src),
|
|
sourcePort,
|
|
ip6addr_string(ndo, &ip6->ip6_dst),
|
|
destPort));
|
|
} else
|
|
#endif /*INET6*/
|
|
{
|
|
ND_PRINT((ndo, "%s.%d > %s.%d: sctp",
|
|
ipaddr_string(ndo, &ip->ip_src),
|
|
sourcePort,
|
|
ipaddr_string(ndo, &ip->ip_dst),
|
|
destPort));
|
|
}
|
|
|
|
if (isForCES_port(sourcePort)) {
|
|
ND_PRINT((ndo, "[%s]", tok2str(ForCES_channels, NULL, sourcePort)));
|
|
isforces = 1;
|
|
}
|
|
if (isForCES_port(destPort)) {
|
|
ND_PRINT((ndo, "[%s]", tok2str(ForCES_channels, NULL, destPort)));
|
|
isforces = 1;
|
|
}
|
|
|
|
if (ndo->ndo_vflag >= 2)
|
|
sep = "\n\t";
|
|
else
|
|
sep = " (";
|
|
/* cycle through all chunks, printing information on each one */
|
|
for (chunkCount = 0,
|
|
chunkDescPtr = (const struct sctpChunkDesc *)
|
|
((const u_char*) sctpPktHdr + sizeof(struct sctpHeader));
|
|
chunkDescPtr != NULL &&
|
|
( (const void *)
|
|
((const u_char *) chunkDescPtr + sizeof(struct sctpChunkDesc))
|
|
<= endPacketPtr);
|
|
|
|
chunkDescPtr = (const struct sctpChunkDesc *) nextChunk, chunkCount++)
|
|
{
|
|
uint16_t chunkLength;
|
|
const u_char *chunkEnd;
|
|
uint16_t align;
|
|
|
|
ND_TCHECK(*chunkDescPtr);
|
|
chunkLength = EXTRACT_16BITS(&chunkDescPtr->chunkLength);
|
|
if (chunkLength < sizeof(*chunkDescPtr)) {
|
|
ND_PRINT((ndo, "%s%d) [Bad chunk length %u]", sep, chunkCount+1, chunkLength));
|
|
break;
|
|
}
|
|
|
|
ND_TCHECK2(*((uint8_t *)chunkDescPtr), chunkLength);
|
|
chunkEnd = ((const u_char*)chunkDescPtr + chunkLength);
|
|
|
|
align=chunkLength % 4;
|
|
if (align != 0)
|
|
align = 4 - align;
|
|
|
|
nextChunk = (const void *) (chunkEnd + align);
|
|
|
|
ND_PRINT((ndo, "%s%d) ", sep, chunkCount+1));
|
|
ND_PRINT((ndo, "[%s] ", tok2str(sctp_chunkid_str, "Unknown chunk type: 0x%x",
|
|
chunkDescPtr->chunkID)));
|
|
switch (chunkDescPtr->chunkID)
|
|
{
|
|
case SCTP_DATA :
|
|
{
|
|
const struct sctpDataPart *dataHdrPtr;
|
|
uint32_t ppid;
|
|
const u_char *payloadPtr;
|
|
u_int payload_size;
|
|
|
|
if ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
|
|
== SCTP_DATA_UNORDERED)
|
|
ND_PRINT((ndo, "(U)"));
|
|
|
|
if ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
|
|
== SCTP_DATA_FIRST_FRAG)
|
|
ND_PRINT((ndo, "(B)"));
|
|
|
|
if ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
|
|
== SCTP_DATA_LAST_FRAG)
|
|
ND_PRINT((ndo, "(E)"));
|
|
|
|
if( ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
|
|
== SCTP_DATA_UNORDERED)
|
|
||
|
|
((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
|
|
== SCTP_DATA_FIRST_FRAG)
|
|
||
|
|
((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
|
|
== SCTP_DATA_LAST_FRAG) )
|
|
ND_PRINT((ndo, " "));
|
|
|
|
dataHdrPtr=(const struct sctpDataPart*)(chunkDescPtr+1);
|
|
|
|
ppid = EXTRACT_32BITS(&dataHdrPtr->payloadtype);
|
|
ND_PRINT((ndo, "[TSN: %u] ", EXTRACT_32BITS(&dataHdrPtr->TSN)));
|
|
ND_PRINT((ndo, "[SID: %u] ", EXTRACT_16BITS(&dataHdrPtr->streamId)));
|
|
ND_PRINT((ndo, "[SSEQ %u] ", EXTRACT_16BITS(&dataHdrPtr->sequence)));
|
|
ND_PRINT((ndo, "[PPID %s] ",
|
|
tok2str(PayloadProto_idents, "0x%x", ppid)));
|
|
|
|
if (!isforces) {
|
|
isforces = (ppid == SCTP_PPID_FORCES_HP) ||
|
|
(ppid == SCTP_PPID_FORCES_MP) ||
|
|
(ppid == SCTP_PPID_FORCES_LP);
|
|
}
|
|
|
|
payloadPtr = (const u_char *) (dataHdrPtr + 1);
|
|
if (EXTRACT_16BITS(&chunkDescPtr->chunkLength) <
|
|
sizeof(struct sctpDataPart) + sizeof(struct sctpChunkDesc) + 1) {
|
|
ND_PRINT((ndo, "bogus chunk length %u]", EXTRACT_16BITS(&chunkDescPtr->chunkLength)));
|
|
return;
|
|
}
|
|
|
|
payload_size = EXTRACT_16BITS(&chunkDescPtr->chunkLength) -
|
|
(sizeof(struct sctpDataPart) + sizeof(struct sctpChunkDesc));
|
|
|
|
if (isforces) {
|
|
forces_print(ndo, payloadPtr, payload_size);
|
|
} else if (ndo->ndo_vflag >= 2) { /* if verbose output is specified */
|
|
/* at the command line */
|
|
switch (ppid) {
|
|
case SCTP_PPID_M3UA :
|
|
m3ua_print(ndo, payloadPtr, payload_size);
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, "[Payload"));
|
|
if (!ndo->ndo_suppress_default_print) {
|
|
ND_PRINT((ndo, ":"));
|
|
ND_DEFAULTPRINT(payloadPtr, payload_size);
|
|
}
|
|
ND_PRINT((ndo, "]"));
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case SCTP_INITIATION :
|
|
{
|
|
const struct sctpInitiation *init;
|
|
|
|
init=(const struct sctpInitiation*)(chunkDescPtr+1);
|
|
ND_PRINT((ndo, "[init tag: %u] ", EXTRACT_32BITS(&init->initTag)));
|
|
ND_PRINT((ndo, "[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit)));
|
|
ND_PRINT((ndo, "[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams)));
|
|
ND_PRINT((ndo, "[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams)));
|
|
ND_PRINT((ndo, "[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN)));
|
|
|
|
#if(0) /* ALC you can add code for optional params here */
|
|
if( (init+1) < chunkEnd )
|
|
ND_PRINT((ndo, " @@@@@ UNFINISHED @@@@@@%s\n",
|
|
"Optional params present, but not printed."));
|
|
#endif
|
|
break;
|
|
}
|
|
case SCTP_INITIATION_ACK :
|
|
{
|
|
const struct sctpInitiation *init;
|
|
|
|
init=(const struct sctpInitiation*)(chunkDescPtr+1);
|
|
ND_PRINT((ndo, "[init tag: %u] ", EXTRACT_32BITS(&init->initTag)));
|
|
ND_PRINT((ndo, "[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit)));
|
|
ND_PRINT((ndo, "[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams)));
|
|
ND_PRINT((ndo, "[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams)));
|
|
ND_PRINT((ndo, "[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN)));
|
|
|
|
#if(0) /* ALC you can add code for optional params here */
|
|
if( (init+1) < chunkEnd )
|
|
ND_PRINT((ndo, " @@@@@ UNFINISHED @@@@@@%s\n",
|
|
"Optional params present, but not printed."));
|
|
#endif
|
|
break;
|
|
}
|
|
case SCTP_SELECTIVE_ACK:
|
|
{
|
|
const struct sctpSelectiveAck *sack;
|
|
const struct sctpSelectiveFrag *frag;
|
|
int fragNo, tsnNo;
|
|
const u_char *dupTSN;
|
|
|
|
sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1);
|
|
ND_PRINT((ndo, "[cum ack %u] ", EXTRACT_32BITS(&sack->highestConseqTSN)));
|
|
ND_PRINT((ndo, "[a_rwnd %u] ", EXTRACT_32BITS(&sack->updatedRwnd)));
|
|
ND_PRINT((ndo, "[#gap acks %u] ", EXTRACT_16BITS(&sack->numberOfdesc)));
|
|
ND_PRINT((ndo, "[#dup tsns %u] ", EXTRACT_16BITS(&sack->numDupTsns)));
|
|
|
|
|
|
/* print gaps */
|
|
for (frag = ( (const struct sctpSelectiveFrag *)
|
|
((const struct sctpSelectiveAck *) sack+1)),
|
|
fragNo=0;
|
|
(const void *)frag < nextChunk && fragNo < EXTRACT_16BITS(&sack->numberOfdesc);
|
|
frag++, fragNo++)
|
|
ND_PRINT((ndo, "\n\t\t[gap ack block #%d: start = %u, end = %u] ",
|
|
fragNo+1,
|
|
EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentStart),
|
|
EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentEnd)));
|
|
|
|
|
|
/* print duplicate TSNs */
|
|
for (dupTSN = (const u_char *)frag, tsnNo=0;
|
|
(const void *) dupTSN < nextChunk && tsnNo<EXTRACT_16BITS(&sack->numDupTsns);
|
|
dupTSN += 4, tsnNo++)
|
|
ND_PRINT((ndo, "\n\t\t[dup TSN #%u: %u] ", tsnNo+1,
|
|
EXTRACT_32BITS(dupTSN)));
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ndo->ndo_vflag < 2)
|
|
sep = ", (";
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|sctp]"));
|
|
}
|