The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2001 NETLAB, Temple University |
| 2 | * Copyright (c) 2001 Protocol Engineering Lab, University of Delaware |
| 3 | * |
| 4 | * Jerry Heinz <gheinz@astro.temple.edu> |
| 5 | * John Fiore <jfiore@joda.cis.temple.edu> |
| 6 | * Armando L. Caro Jr. <acaro@cis.udel.edu> |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 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. |
| 18 | * |
| 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. |
| 22 | * |
| 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 |
| 33 | * SUCH DAMAGE. |
| 34 | */ |
| 35 | |
| 36 | #ifndef lint |
| 37 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 38 | "@(#) $Header: /tcpdump/master/tcpdump/print-sctp.c,v 1.21 2007-09-13 18:03:49 guy Exp $ (NETLAB/PEL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 39 | #endif |
| 40 | |
| 41 | #ifdef HAVE_CONFIG_H |
| 42 | #include "config.h" |
| 43 | #endif |
| 44 | |
| 45 | #include <tcpdump-stdinc.h> |
| 46 | |
| 47 | #include "sctpHeader.h" |
| 48 | #include "sctpConstants.h" |
| 49 | #include <assert.h> |
| 50 | |
| 51 | #include <stdio.h> |
| 52 | #include <string.h> |
| 53 | |
| 54 | #include "interface.h" |
| 55 | #include "addrtoname.h" |
| 56 | #include "extract.h" /* must come after interface.h */ |
| 57 | #include "ip.h" |
| 58 | #ifdef INET6 |
| 59 | #include "ip6.h" |
| 60 | #endif |
| 61 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 62 | #define CHAN_HP 6704 |
| 63 | #define CHAN_MP 6705 |
| 64 | #define CHAN_LP 6706 |
| 65 | |
| 66 | static const struct tok ForCES_channels[] = { |
| 67 | { CHAN_HP, "ForCES HP" }, |
| 68 | { CHAN_MP, "ForCES MP" }, |
| 69 | { CHAN_LP, "ForCES LP" }, |
| 70 | { 0, NULL } |
| 71 | }; |
| 72 | |
| 73 | static inline int isForCES_port(u_short Port) |
| 74 | { |
| 75 | if (Port == CHAN_HP) |
| 76 | return 1; |
| 77 | if (Port == CHAN_MP) |
| 78 | return 1; |
| 79 | if (Port == CHAN_LP) |
| 80 | return 1; |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 85 | void sctp_print(const u_char *bp, /* beginning of sctp packet */ |
| 86 | const u_char *bp2, /* beginning of enclosing */ |
| 87 | u_int sctpPacketLength) /* ip packet */ |
| 88 | { |
| 89 | const struct sctpHeader *sctpPktHdr; |
| 90 | const struct ip *ip; |
| 91 | #ifdef INET6 |
| 92 | const struct ip6_hdr *ip6; |
| 93 | #endif |
| 94 | const void *endPacketPtr; |
| 95 | u_short sourcePort, destPort; |
| 96 | int chunkCount; |
| 97 | const struct sctpChunkDesc *chunkDescPtr; |
| 98 | const void *nextChunk; |
| 99 | const char *sep; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 100 | int isforces = 0; |
| 101 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 102 | |
| 103 | sctpPktHdr = (const struct sctpHeader*) bp; |
| 104 | endPacketPtr = (const u_char*)sctpPktHdr+sctpPacketLength; |
| 105 | |
| 106 | if( (u_long) endPacketPtr > (u_long) snapend) |
| 107 | endPacketPtr = (const void *) snapend; |
| 108 | ip = (struct ip *)bp2; |
| 109 | #ifdef INET6 |
| 110 | if (IP_V(ip) == 6) |
| 111 | ip6 = (const struct ip6_hdr *)bp2; |
| 112 | else |
| 113 | ip6 = NULL; |
| 114 | #endif /*INET6*/ |
| 115 | TCHECK(*sctpPktHdr); |
| 116 | |
| 117 | if (sctpPacketLength < sizeof(struct sctpHeader)) |
| 118 | { |
| 119 | (void)printf("truncated-sctp - %ld bytes missing!", |
| 120 | (long)sctpPacketLength-sizeof(struct sctpHeader)); |
| 121 | return; |
| 122 | } |
| 123 | |
| 124 | /* sctpPacketLength -= sizeof(struct sctpHeader); packet length */ |
| 125 | /* is now only as long as the payload */ |
| 126 | |
| 127 | sourcePort = EXTRACT_16BITS(&sctpPktHdr->source); |
| 128 | destPort = EXTRACT_16BITS(&sctpPktHdr->destination); |
| 129 | |
| 130 | #ifdef INET6 |
| 131 | if (ip6) { |
| 132 | (void)printf("%s.%d > %s.%d: sctp", |
| 133 | ip6addr_string(&ip6->ip6_src), |
| 134 | sourcePort, |
| 135 | ip6addr_string(&ip6->ip6_dst), |
| 136 | destPort); |
| 137 | } else |
| 138 | #endif /*INET6*/ |
| 139 | { |
| 140 | (void)printf("%s.%d > %s.%d: sctp", |
| 141 | ipaddr_string(&ip->ip_src), |
| 142 | sourcePort, |
| 143 | ipaddr_string(&ip->ip_dst), |
| 144 | destPort); |
| 145 | } |
| 146 | fflush(stdout); |
| 147 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 148 | if (isForCES_port(sourcePort)) { |
| 149 | printf("[%s]", tok2str(ForCES_channels, NULL, sourcePort)); |
| 150 | isforces = 1; |
| 151 | } |
| 152 | if (isForCES_port(destPort)) { |
| 153 | printf("[%s]", tok2str(ForCES_channels, NULL, destPort)); |
| 154 | isforces = 1; |
| 155 | } |
| 156 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 157 | if (vflag >= 2) |
| 158 | sep = "\n\t"; |
| 159 | else |
| 160 | sep = " ("; |
| 161 | /* cycle through all chunks, printing information on each one */ |
| 162 | for (chunkCount = 0, |
| 163 | chunkDescPtr = (const struct sctpChunkDesc *) |
| 164 | ((const u_char*) sctpPktHdr + sizeof(struct sctpHeader)); |
| 165 | chunkDescPtr != NULL && |
| 166 | ( (const void *) |
| 167 | ((const u_char *) chunkDescPtr + sizeof(struct sctpChunkDesc)) |
| 168 | <= endPacketPtr); |
| 169 | |
| 170 | chunkDescPtr = (const struct sctpChunkDesc *) nextChunk, chunkCount++) |
| 171 | { |
| 172 | u_int16_t chunkLength; |
| 173 | const u_char *chunkEnd; |
| 174 | u_int16_t align; |
| 175 | |
| 176 | TCHECK(*chunkDescPtr); |
| 177 | chunkLength = EXTRACT_16BITS(&chunkDescPtr->chunkLength); |
| 178 | if (chunkLength < sizeof(*chunkDescPtr)) { |
| 179 | printf("%s%d) [Bad chunk length %u]", sep, chunkCount+1, chunkLength); |
| 180 | break; |
| 181 | } |
| 182 | |
| 183 | TCHECK2(*((u_int8_t *)chunkDescPtr), chunkLength); |
| 184 | chunkEnd = ((const u_char*)chunkDescPtr + chunkLength); |
| 185 | |
| 186 | align=chunkLength % 4; |
| 187 | if (align != 0) |
| 188 | align = 4 - align; |
| 189 | |
| 190 | nextChunk = (const void *) (chunkEnd + align); |
| 191 | |
| 192 | printf("%s%d) ", sep, chunkCount+1); |
| 193 | switch (chunkDescPtr->chunkID) |
| 194 | { |
| 195 | case SCTP_DATA : |
| 196 | { |
| 197 | const struct sctpDataPart *dataHdrPtr; |
| 198 | |
| 199 | printf("[DATA] "); |
| 200 | |
| 201 | if ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED) |
| 202 | == SCTP_DATA_UNORDERED) |
| 203 | printf("(U)"); |
| 204 | |
| 205 | if ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG) |
| 206 | == SCTP_DATA_FIRST_FRAG) |
| 207 | printf("(B)"); |
| 208 | |
| 209 | if ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG) |
| 210 | == SCTP_DATA_LAST_FRAG) |
| 211 | printf("(E)"); |
| 212 | |
| 213 | if( ((chunkDescPtr->chunkFlg & SCTP_DATA_UNORDERED) |
| 214 | == SCTP_DATA_UNORDERED) |
| 215 | || |
| 216 | ((chunkDescPtr->chunkFlg & SCTP_DATA_FIRST_FRAG) |
| 217 | == SCTP_DATA_FIRST_FRAG) |
| 218 | || |
| 219 | ((chunkDescPtr->chunkFlg & SCTP_DATA_LAST_FRAG) |
| 220 | == SCTP_DATA_LAST_FRAG) ) |
| 221 | printf(" "); |
| 222 | |
| 223 | dataHdrPtr=(const struct sctpDataPart*)(chunkDescPtr+1); |
| 224 | |
| 225 | printf("[TSN: %u] ", EXTRACT_32BITS(&dataHdrPtr->TSN)); |
| 226 | printf("[SID: %u] ", EXTRACT_16BITS(&dataHdrPtr->streamId)); |
| 227 | printf("[SSEQ %u] ", EXTRACT_16BITS(&dataHdrPtr->sequence)); |
| 228 | printf("[PPID 0x%x] ", EXTRACT_32BITS(&dataHdrPtr->payloadtype)); |
| 229 | fflush(stdout); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 230 | if (isforces) { |
| 231 | const u_char *payloadPtr; |
| 232 | u_int chunksize = sizeof(struct sctpDataPart)+ |
| 233 | sizeof(struct sctpChunkDesc); |
| 234 | payloadPtr = (const u_char *) (dataHdrPtr + 1); |
| 235 | if (EXTRACT_16BITS(&chunkDescPtr->chunkLength) < |
| 236 | sizeof(struct sctpDataPart)+ |
| 237 | sizeof(struct sctpChunkDesc)+1) { |
| 238 | /* Less than 1 byte of chunk payload */ |
| 239 | printf("bogus ForCES chunk length %u]", |
| 240 | EXTRACT_16BITS(&chunkDescPtr->chunkLength)); |
| 241 | return; |
| 242 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 243 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 244 | forces_print(payloadPtr, EXTRACT_16BITS(&chunkDescPtr->chunkLength)- chunksize); |
| 245 | } else if (vflag >= 2) { /* if verbose output is specified */ |
| 246 | /* at the command line */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 247 | const u_char *payloadPtr; |
| 248 | |
| 249 | printf("[Payload"); |
| 250 | |
| 251 | if (!suppress_default_print) { |
| 252 | payloadPtr = (const u_char *) (++dataHdrPtr); |
| 253 | printf(":"); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 254 | if (EXTRACT_16BITS(&chunkDescPtr->chunkLength) < |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 255 | sizeof(struct sctpDataPart)+ |
| 256 | sizeof(struct sctpChunkDesc)+1) { |
| 257 | /* Less than 1 byte of chunk payload */ |
| 258 | printf("bogus chunk length %u]", |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 259 | EXTRACT_16BITS(&chunkDescPtr->chunkLength)); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 260 | return; |
| 261 | } |
| 262 | default_print(payloadPtr, |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 263 | EXTRACT_16BITS(&chunkDescPtr->chunkLength) - |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 264 | (sizeof(struct sctpDataPart)+ |
| 265 | sizeof(struct sctpChunkDesc))); |
| 266 | } else |
| 267 | printf("]"); |
| 268 | } |
| 269 | break; |
| 270 | } |
| 271 | case SCTP_INITIATION : |
| 272 | { |
| 273 | const struct sctpInitiation *init; |
| 274 | |
| 275 | printf("[INIT] "); |
| 276 | init=(const struct sctpInitiation*)(chunkDescPtr+1); |
| 277 | printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag)); |
| 278 | printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit)); |
| 279 | printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams)); |
| 280 | printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams)); |
| 281 | printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN)); |
| 282 | |
| 283 | #if(0) /* ALC you can add code for optional params here */ |
| 284 | if( (init+1) < chunkEnd ) |
| 285 | printf(" @@@@@ UNFINISHED @@@@@@%s\n", |
| 286 | "Optional params present, but not printed."); |
| 287 | #endif |
| 288 | break; |
| 289 | } |
| 290 | case SCTP_INITIATION_ACK : |
| 291 | { |
| 292 | const struct sctpInitiation *init; |
| 293 | |
| 294 | printf("[INIT ACK] "); |
| 295 | init=(const struct sctpInitiation*)(chunkDescPtr+1); |
| 296 | printf("[init tag: %u] ", EXTRACT_32BITS(&init->initTag)); |
| 297 | printf("[rwnd: %u] ", EXTRACT_32BITS(&init->rcvWindowCredit)); |
| 298 | printf("[OS: %u] ", EXTRACT_16BITS(&init->NumPreopenStreams)); |
| 299 | printf("[MIS: %u] ", EXTRACT_16BITS(&init->MaxInboundStreams)); |
| 300 | printf("[init TSN: %u] ", EXTRACT_32BITS(&init->initialTSN)); |
| 301 | |
| 302 | #if(0) /* ALC you can add code for optional params here */ |
| 303 | if( (init+1) < chunkEnd ) |
| 304 | printf(" @@@@@ UNFINISHED @@@@@@%s\n", |
| 305 | "Optional params present, but not printed."); |
| 306 | #endif |
| 307 | break; |
| 308 | } |
| 309 | case SCTP_SELECTIVE_ACK: |
| 310 | { |
| 311 | const struct sctpSelectiveAck *sack; |
| 312 | const struct sctpSelectiveFrag *frag; |
| 313 | int fragNo, tsnNo; |
| 314 | const u_char *dupTSN; |
| 315 | |
| 316 | printf("[SACK] "); |
| 317 | sack=(const struct sctpSelectiveAck*)(chunkDescPtr+1); |
| 318 | printf("[cum ack %u] ", EXTRACT_32BITS(&sack->highestConseqTSN)); |
| 319 | printf("[a_rwnd %u] ", EXTRACT_32BITS(&sack->updatedRwnd)); |
| 320 | printf("[#gap acks %u] ", EXTRACT_16BITS(&sack->numberOfdesc)); |
| 321 | printf("[#dup tsns %u] ", EXTRACT_16BITS(&sack->numDupTsns)); |
| 322 | |
| 323 | |
| 324 | /* print gaps */ |
| 325 | for (frag = ( (const struct sctpSelectiveFrag *) |
| 326 | ((const struct sctpSelectiveAck *) sack+1)), |
| 327 | fragNo=0; |
| 328 | (const void *)frag < nextChunk && fragNo < EXTRACT_16BITS(&sack->numberOfdesc); |
| 329 | frag++, fragNo++) |
| 330 | printf("\n\t\t[gap ack block #%d: start = %u, end = %u] ", |
| 331 | fragNo+1, |
| 332 | EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentStart), |
| 333 | EXTRACT_32BITS(&sack->highestConseqTSN) + EXTRACT_16BITS(&frag->fragmentEnd)); |
| 334 | |
| 335 | |
| 336 | /* print duplicate TSNs */ |
| 337 | for (dupTSN = (const u_char *)frag, tsnNo=0; |
| 338 | (const void *) dupTSN < nextChunk && tsnNo<EXTRACT_16BITS(&sack->numDupTsns); |
| 339 | dupTSN += 4, tsnNo++) |
| 340 | printf("\n\t\t[dup TSN #%u: %u] ", tsnNo+1, |
| 341 | EXTRACT_32BITS(dupTSN)); |
| 342 | |
| 343 | break; |
| 344 | } |
| 345 | case SCTP_HEARTBEAT_REQUEST : |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 346 | printf("[HB REQ] "); |
| 347 | break; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 348 | case SCTP_HEARTBEAT_ACK : |
| 349 | printf("[HB ACK] "); |
| 350 | break; |
| 351 | case SCTP_ABORT_ASSOCIATION : |
| 352 | printf("[ABORT] "); |
| 353 | break; |
| 354 | case SCTP_SHUTDOWN : |
| 355 | printf("[SHUTDOWN] "); |
| 356 | break; |
| 357 | case SCTP_SHUTDOWN_ACK : |
| 358 | printf("[SHUTDOWN ACK] "); |
| 359 | break; |
| 360 | case SCTP_OPERATION_ERR : |
| 361 | printf("[OP ERR] "); |
| 362 | break; |
| 363 | case SCTP_COOKIE_ECHO : |
| 364 | printf("[COOKIE ECHO] "); |
| 365 | break; |
| 366 | case SCTP_COOKIE_ACK : |
| 367 | printf("[COOKIE ACK] "); |
| 368 | break; |
| 369 | case SCTP_ECN_ECHO : |
| 370 | printf("[ECN ECHO] "); |
| 371 | break; |
| 372 | case SCTP_ECN_CWR : |
| 373 | printf("[ECN CWR] "); |
| 374 | break; |
| 375 | case SCTP_SHUTDOWN_COMPLETE : |
| 376 | printf("[SHUTDOWN COMPLETE] "); |
| 377 | break; |
| 378 | case SCTP_FORWARD_CUM_TSN : |
| 379 | printf("[FOR CUM TSN] "); |
| 380 | break; |
| 381 | case SCTP_RELIABLE_CNTL : |
| 382 | printf("[REL CTRL] "); |
| 383 | break; |
| 384 | case SCTP_RELIABLE_CNTL_ACK : |
| 385 | printf("[REL CTRL ACK] "); |
| 386 | break; |
| 387 | default : |
| 388 | printf("[Unknown chunk type: 0x%x]", chunkDescPtr->chunkID); |
| 389 | return; |
| 390 | } |
| 391 | |
| 392 | if (vflag < 2) |
| 393 | sep = ", ("; |
| 394 | } |
| 395 | return; |
| 396 | |
| 397 | trunc: |
| 398 | printf("[|sctp]"); |
| 399 | return; |
| 400 | } |