1 /* Copyright (c) 2001 NETLAB, Temple University
2 * Copyright (c) 2001 Protocol Engineering Lab, University of Delaware
4 * Jerry Heinz <gheinz@astro.temple.edu>
5 * John Fiore <jfiore@joda.cis.temple.edu>
6 * Armando L. Caro Jr. <acaro@cis.udel.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor of the Laboratory may be used
20 * to endorse or promote products derived from this software without
21 * specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 static const char rcsid[] _U_ =
38 "@(#) $Header: /tcpdump/master/tcpdump/print-sctp.c,v 1.16.2.5 2007/09/13 18:04:58 guy Exp $ (NETLAB/PEL)";
45 #include <tcpdump-stdinc.h>
47 #include "sctpHeader.h"
48 #include "sctpConstants.h"
54 #include "interface.h"
55 #include "addrtoname.h"
56 #include "extract.h" /* must come after interface.h */
62 void sctp_print(const u_char *bp, /* beginning of sctp packet */
63 const u_char *bp2, /* beginning of enclosing */
64 u_int sctpPacketLength) /* ip packet */
66 const struct sctpHeader *sctpPktHdr;
69 const struct ip6_hdr *ip6;
71 const void *endPacketPtr;
72 u_short sourcePort, destPort;
74 const struct sctpChunkDesc *chunkDescPtr;
75 const void *nextChunk;
78 sctpPktHdr = (const struct sctpHeader*) bp;
79 endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength;
81 if( (u_long) endPacketPtr > (u_long) snapend)
82 endPacketPtr = (const void *) snapend;
83 ip = (struct ip *)bp2;
86 ip6 = (const struct ip6_hdr *)bp2;
92 if (sctpPacketLength < sizeof(struct sctpHeader))
94 (void)printf("truncated-sctp - %ld bytes missing!",
95 (long)sctpPacketLength-sizeof(struct sctpHeader));
99 /* sctpPacketLength -= sizeof(struct sctpHeader); packet length */
100 /* is now only as long as the payload */
102 sourcePort = EXTRACT_16BITS(&sctpPktHdr->source);
103 destPort = EXTRACT_16BITS(&sctpPktHdr->destination);
107 (void)printf("%s.%d > %s.%d: sctp",
108 ip6addr_string(&ip6->ip6_src),
110 ip6addr_string(&ip6->ip6_dst),
115 (void)printf("%s.%d > %s.%d: sctp",
116 ipaddr_string(&ip->ip_src),
118 ipaddr_string(&ip->ip_dst),
127 /* cycle through all chunks, printing information on each one */
129 chunkDescPtr = (const struct sctpChunkDesc *)
130 ((const u_char*) sctpPktHdr + sizeof(struct sctpHeader));
131 chunkDescPtr != NULL &&
133 ((const u_char *) chunkDescPtr + sizeof(struct sctpChunkDesc))
136 chunkDescPtr = (const struct sctpChunkDesc *) nextChunk, chunkCount++)
138 u_int16_t chunkLength;
139 const u_char *chunkEnd;
142 TCHECK(*chunkDescPtr);
143 chunkLength = EXTRACT_16BITS(&chunkDescPtr->chunkLength);
144 if (chunkLength < sizeof(*chunkDescPtr)) {
145 printf("%s%d) [Bad chunk length %u]", sep, chunkCount+1, chunkLength);
149 TCHECK2(*((u_int8_t *)chunkDescPtr), chunkLength);
150 chunkEnd = ((const u_char*)chunkDescPtr + chunkLength);
152 align=chunkLength % 4;
156 nextChunk = (const void *) (chunkEnd + align);
158 printf("%s%d) ", sep, chunkCount+1);
159 switch (chunkDescPtr->chunkID)
163 const struct sctpDataPart *dataHdrPtr;
167 if ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
168 == SCTP_DATA_UNORDERED)
171 if ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
172 == SCTP_DATA_FIRST_FRAG)
175 if ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
176 == SCTP_DATA_LAST_FRAG)
179 if( ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED)
180 == SCTP_DATA_UNORDERED)
182 ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG)
183 == SCTP_DATA_FIRST_FRAG)
185 ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG)
186 == SCTP_DATA_LAST_FRAG) )
189 dataHdrPtr=(const struct sctpDataPart*)(chunkDescPtr+1);
191 printf("[TSN: %u] ", EXTRACT_32BITS(&dataHdrPtr->TSN));
192 printf("[SID: %u] ", EXTRACT_16BITS(&dataHdrPtr->streamId));
193 printf("[SSEQ %u] ", EXTRACT_16BITS(&dataHdrPtr->sequence));
194 printf("[PPID 0x%x] ", EXTRACT_32BITS(&dataHdrPtr->payloadtype));
197 if (vflag >= 2) /* if verbose output is specified */
198 { /* at the command line */
199 const u_char *payloadPtr;
203 if (!suppress_default_print) {
204 payloadPtr = (const u_char *) (++dataHdrPtr);
206 if (htons(chunkDescPtr->chunkLength) <
207 sizeof(struct sctpDataPart)+
208 sizeof(struct sctpChunkDesc)+1) {
209 /* Less than 1 byte of chunk payload */
210 printf("bogus chunk length %u]",
211 htons(chunkDescPtr->chunkLength));
214 default_print(payloadPtr,
215 htons(chunkDescPtr->chunkLength) -
216 (sizeof(struct sctpDataPart)+
217 sizeof(struct sctpChunkDesc)));
223 case SCTP_INITIATION :
225 const struct sctpInitiation *init;
228 init=(const struct sctpInitiation*)(chunkDescPtr+1);
229 printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag));
230 printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit));
231 printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams));
232 printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams));
233 printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN));
235 #if(0) /* ALC you can add code for optional params here */
236 if( (init+1) < chunkEnd )
237 printf(" @@@@@ UNFINISHED @@@@@@%s\n",
238 "Optional params present, but not printed.");
242 case SCTP_INITIATION_ACK :
244 const struct sctpInitiation *init;
246 printf("[INIT ACK] ");
247 init=(const struct sctpInitiation*)(chunkDescPtr+1);
248 printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag));
249 printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit));
250 printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams));
251 printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams));
252 printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN));
254 #if(0) /* ALC you can add code for optional params here */
255 if( (init+1) < chunkEnd )
256 printf(" @@@@@ UNFINISHED @@@@@@%s\n",
257 "Optional params present, but not printed.");
261 case SCTP_SELECTIVE_ACK:
263 const struct sctpSelectiveAck *sack;
264 const struct sctpSelectiveFrag *frag;
266 const u_char *dupTSN;
269 sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1);
270 printf("[cum ack %u] ", EXTRACT_32BITS(&sack->highestConseqTSN));
271 printf("[a_rwnd %u] ", EXTRACT_32BITS(&sack->updatedRwnd));
272 printf("[#gap acks %u] ", EXTRACT_16BITS(&sack->numberOfdesc));
273 printf("[#dup tsns %u] ", EXTRACT_16BITS(&sack->numDupTsns));
277 for (frag = ( (const struct sctpSelectiveFrag *)
278 ((const struct sctpSelectiveAck *) sack+1)),
280 (const void *)frag < nextChunk && fragNo < EXTRACT_16BITS(&sack->numberOfdesc);
282 printf("\n\t\t[gap ack block #%d: start = %u, end = %u] ",
284 EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentStart),
285 EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentEnd));
288 /* print duplicate TSNs */
289 for (dupTSN = (const u_char *)frag, tsnNo=0;
290 (const void *) dupTSN < nextChunk && tsnNo<EXTRACT_16BITS(&sack->numDupTsns);
291 dupTSN += 4, tsnNo++)
292 printf("\n\t\t[dup TSN #%u: %u] ", tsnNo+1,
293 EXTRACT_32BITS(dupTSN));
297 case SCTP_HEARTBEAT_REQUEST :
299 const struct sctpHBsender *hb;
301 hb=(const struct sctpHBsender*)chunkDescPtr;
307 case SCTP_HEARTBEAT_ACK :
310 case SCTP_ABORT_ASSOCIATION :
314 printf("[SHUTDOWN] ");
316 case SCTP_SHUTDOWN_ACK :
317 printf("[SHUTDOWN ACK] ");
319 case SCTP_OPERATION_ERR :
322 case SCTP_COOKIE_ECHO :
323 printf("[COOKIE ECHO] ");
325 case SCTP_COOKIE_ACK :
326 printf("[COOKIE ACK] ");
329 printf("[ECN ECHO] ");
332 printf("[ECN CWR] ");
334 case SCTP_SHUTDOWN_COMPLETE :
335 printf("[SHUTDOWN COMPLETE] ");
337 case SCTP_FORWARD_CUM_TSN :
338 printf("[FOR CUM TSN] ");
340 case SCTP_RELIABLE_CNTL :
341 printf("[REL CTRL] ");
343 case SCTP_RELIABLE_CNTL_ACK :
344 printf("[REL CTRL ACK] ");
347 printf("[Unknown chunk type: 0x%x]", chunkDescPtr->chunkID);