346 lines
10 KiB
C
346 lines
10 KiB
C
/* Copyright (c) 2001 NETLAB, Temple University
|
|
* Copyright (c) 2001 Protocol Engineering Lab, University of Delaware
|
|
*
|
|
* Jerry Heinz <gheinz@astro.temple.edu>
|
|
* John Fiore <jfiore@joda.cis.temple.edu>
|
|
* Armando L. Caro Jr. <acaro@cis.udel.edu>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. 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.
|
|
*
|
|
* 3. Neither the name of the University nor of the Laboratory may be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-sctp.c,v 1.13.2.2 2003/11/16 08:51:44 guy Exp $ (NETLAB/PEL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include "sctpHeader.h"
|
|
#include "sctpConstants.h"
|
|
#include <assert.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h" /* must come after interface.h */
|
|
#include "ip.h"
|
|
#ifdef INET6
|
|
#include "ip6.h"
|
|
#endif
|
|
|
|
void sctp_print(const u_char *bp, /* beginning of sctp packet */
|
|
const u_char *bp2, /* beginning of enclosing */
|
|
u_int sctpPacketLength) /* ip packet */
|
|
{
|
|
const struct sctpHeader *sctpPktHdr;
|
|
const struct ip *ip;
|
|
#ifdef INET6
|
|
const struct ip6_hdr *ip6;
|
|
#endif
|
|
const u_char *cp;
|
|
const void *endPacketPtr;
|
|
u_short sourcePort, destPort;
|
|
int chunkCount;
|
|
const struct sctpChunkDesc *chunkDescPtr;
|
|
const void *nextChunk;
|
|
|
|
sctpPktHdr = (const struct sctpHeader*) bp;
|
|
endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength;
|
|
|
|
if( (u_long) endPacketPtr > (u_long) snapend)
|
|
endPacketPtr = (const void *) snapend;
|
|
ip = (struct ip *)bp2;
|
|
#ifdef INET6
|
|
if (IP_V(ip) == 6)
|
|
ip6 = (const struct ip6_hdr *)bp2;
|
|
else
|
|
ip6 = NULL;
|
|
#endif /*INET6*/
|
|
cp = (const u_char *)(sctpPktHdr + 1);
|
|
if (cp > snapend)
|
|
{
|
|
printf("[|sctp]");
|
|
return;
|
|
}
|
|
|
|
if (sctpPacketLength < sizeof(struct sctpHeader))
|
|
{
|
|
(void)printf("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) {
|
|
(void)printf("%s.%d > %s.%d: sctp",
|
|
ip6addr_string(&ip6->ip6_src),
|
|
sourcePort,
|
|
ip6addr_string(&ip6->ip6_dst),
|
|
destPort);
|
|
} else
|
|
#endif /*INET6*/
|
|
{
|
|
(void)printf("%s.%d > %s.%d: sctp",
|
|
ipaddr_string(&ip->ip_src),
|
|
sourcePort,
|
|
ipaddr_string(&ip->ip_dst),
|
|
destPort);
|
|
}
|
|
fflush(stdout);
|
|
|
|
if (vflag < 2)
|
|
return;
|
|
|
|
/* 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++)
|
|
{
|
|
u_short align;
|
|
const u_char *chunkEnd;
|
|
|
|
chunkEnd = ((const u_char*)chunkDescPtr + EXTRACT_16BITS(&chunkDescPtr->chunkLength));
|
|
|
|
align=EXTRACT_16BITS(&chunkDescPtr->chunkLength) % 4;
|
|
if (align != 0)
|
|
align = 4 - align;
|
|
|
|
nextChunk = (const void *) (chunkEnd + align);
|
|
|
|
printf("\n\t%d) ", chunkCount+1);
|
|
switch (chunkDescPtr->chunkID)
|
|
{
|
|
case SCTP_DATA :
|
|
{
|
|
const struct sctpDataPart *dataHdrPtr;
|
|
|
|
printf("[DATA] ");
|
|
|
|
if ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
|
|
== SCTP_DATA_UNORDERED)
|
|
printf("(U)");
|
|
|
|
if ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
|
|
== SCTP_DATA_FIRST_FRAG)
|
|
printf("(B)");
|
|
|
|
if ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
|
|
== SCTP_DATA_LAST_FRAG)
|
|
printf("(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) )
|
|
printf(" ");
|
|
|
|
dataHdrPtr=(const struct sctpDataPart*)(chunkDescPtr+1);
|
|
|
|
printf("[TSN: %u] ", EXTRACT_32BITS(&dataHdrPtr->TSN));
|
|
printf("[SID: %u] ", EXTRACT_16BITS(&dataHdrPtr->streamId));
|
|
printf("[SSEQ %u] ", EXTRACT_16BITS(&dataHdrPtr->sequence));
|
|
printf("[PPID 0x%x] ", EXTRACT_32BITS(&dataHdrPtr->payloadtype));
|
|
fflush(stdout);
|
|
|
|
if (vflag) /* if verbose output is specified */
|
|
{ /* at the command line */
|
|
const u_char *payloadPtr;
|
|
|
|
printf("[Payload");
|
|
|
|
if (!xflag && !qflag) {
|
|
payloadPtr = (const u_char *) (++dataHdrPtr);
|
|
printf(":");
|
|
if (htons(chunkDescPtr->chunkLength) <
|
|
sizeof(struct sctpDataPart)+
|
|
sizeof(struct sctpChunkDesc)+1) {
|
|
printf("bogus chunk length %u]",
|
|
htons(chunkDescPtr->chunkLength));
|
|
return;
|
|
}
|
|
default_print(payloadPtr,
|
|
htons(chunkDescPtr->chunkLength) -
|
|
(sizeof(struct sctpDataPart)+
|
|
sizeof(struct sctpChunkDesc)+1));
|
|
} else
|
|
printf("]");
|
|
}
|
|
break;
|
|
}
|
|
case SCTP_INITIATION :
|
|
{
|
|
const struct sctpInitiation *init;
|
|
|
|
printf("[INIT] ");
|
|
init=(const struct sctpInitiation*)(chunkDescPtr+1);
|
|
printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag));
|
|
printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit));
|
|
printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams));
|
|
printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams));
|
|
printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN));
|
|
|
|
#if(0) /* ALC you can add code for optional params here */
|
|
if( (init+1) < chunkEnd )
|
|
printf(" @@@@@ UNFINISHED @@@@@@%s\n",
|
|
"Optional params present, but not printed.");
|
|
#endif
|
|
break;
|
|
}
|
|
case SCTP_INITIATION_ACK :
|
|
{
|
|
const struct sctpInitiation *init;
|
|
|
|
printf("[INIT ACK] ");
|
|
init=(const struct sctpInitiation*)(chunkDescPtr+1);
|
|
printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag));
|
|
printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit));
|
|
printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams));
|
|
printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams));
|
|
printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN));
|
|
|
|
#if(0) /* ALC you can add code for optional params here */
|
|
if( (init+1) < chunkEnd )
|
|
printf(" @@@@@ 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_long *dupTSN;
|
|
|
|
printf("[SACK] ");
|
|
sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1);
|
|
printf("[cum ack %u] ", EXTRACT_32BITS(&sack->highestConseqTSN));
|
|
printf("[a_rwnd %u] ", EXTRACT_32BITS(&sack->updatedRwnd));
|
|
printf("[#gap acks %u] ", EXTRACT_16BITS(&sack->numberOfdesc));
|
|
printf("[#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++)
|
|
printf("\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_long*)frag, tsnNo=0;
|
|
(const void *) dupTSN < nextChunk && tsnNo<EXTRACT_16BITS(&sack->numDupTsns);
|
|
dupTSN++, tsnNo++)
|
|
printf("\n\t\t[dup TSN #%u: %u] ", tsnNo+1,
|
|
EXTRACT_32BITS(dupTSN));
|
|
|
|
break;
|
|
}
|
|
case SCTP_HEARTBEAT_REQUEST :
|
|
{
|
|
const struct sctpHBsender *hb;
|
|
|
|
hb=(const struct sctpHBsender*)chunkDescPtr;
|
|
|
|
printf("[HB REQ] ");
|
|
|
|
break;
|
|
}
|
|
case SCTP_HEARTBEAT_ACK :
|
|
printf("[HB ACK] ");
|
|
break;
|
|
case SCTP_ABORT_ASSOCIATION :
|
|
printf("[ABORT] ");
|
|
break;
|
|
case SCTP_SHUTDOWN :
|
|
printf("[SHUTDOWN] ");
|
|
break;
|
|
case SCTP_SHUTDOWN_ACK :
|
|
printf("[SHUTDOWN ACK] ");
|
|
break;
|
|
case SCTP_OPERATION_ERR :
|
|
printf("[OP ERR] ");
|
|
break;
|
|
case SCTP_COOKIE_ECHO :
|
|
printf("[COOKIE ECHO] ");
|
|
break;
|
|
case SCTP_COOKIE_ACK :
|
|
printf("[COOKIE ACK] ");
|
|
break;
|
|
case SCTP_ECN_ECHO :
|
|
printf("[ECN ECHO] ");
|
|
break;
|
|
case SCTP_ECN_CWR :
|
|
printf("[ECN CWR] ");
|
|
break;
|
|
case SCTP_SHUTDOWN_COMPLETE :
|
|
printf("[SHUTDOWN COMPLETE] ");
|
|
break;
|
|
case SCTP_FORWARD_CUM_TSN :
|
|
printf("[FOR CUM TSN] ");
|
|
break;
|
|
case SCTP_RELIABLE_CNTL :
|
|
printf("[REL CTRL] ");
|
|
break;
|
|
case SCTP_RELIABLE_CNTL_ACK :
|
|
printf("[REL CTRL ACK] ");
|
|
break;
|
|
default :
|
|
printf("[Unknown chunk type: 0x%x]", chunkDescPtr->chunkID);
|
|
return;
|
|
}
|
|
}
|
|
}
|