1 /* 2 * Copyright (c) 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 /* \summary: Asynchronous Transfer Mode (ATM) printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <netdissect-stdinc.h> 29 30 #include "netdissect.h" 31 #include "extract.h" 32 #include "addrtoname.h" 33 #include "atm.h" 34 #include "llc.h" 35 36 /* start of the original atmuni31.h */ 37 38 /* 39 * Copyright (c) 1997 Yen Yen Lim and North Dakota State University 40 * All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by Yen Yen Lim and 53 North Dakota State University 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 59 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 60 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 61 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 62 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 63 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 65 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 66 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 67 * POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 /* Based on UNI3.1 standard by ATM Forum */ 71 72 /* ATM traffic types based on VPI=0 and (the following VCI */ 73 #define VCI_PPC 0x05 /* Point-to-point signal msg */ 74 #define VCI_BCC 0x02 /* Broadcast signal msg */ 75 #define VCI_OAMF4SC 0x03 /* Segment OAM F4 flow cell */ 76 #define VCI_OAMF4EC 0x04 /* End-to-end OAM F4 flow cell */ 77 #define VCI_METAC 0x01 /* Meta signal msg */ 78 #define VCI_ILMIC 0x10 /* ILMI msg */ 79 80 /* Q.2931 signalling messages */ 81 #define CALL_PROCEED 0x02 /* call proceeding */ 82 #define CONNECT 0x07 /* connect */ 83 #define CONNECT_ACK 0x0f /* connect_ack */ 84 #define SETUP 0x05 /* setup */ 85 #define RELEASE 0x4d /* release */ 86 #define RELEASE_DONE 0x5a /* release_done */ 87 #define RESTART 0x46 /* restart */ 88 #define RESTART_ACK 0x4e /* restart ack */ 89 #define STATUS 0x7d /* status */ 90 #define STATUS_ENQ 0x75 /* status ack */ 91 #define ADD_PARTY 0x80 /* add party */ 92 #define ADD_PARTY_ACK 0x81 /* add party ack */ 93 #define ADD_PARTY_REJ 0x82 /* add party rej */ 94 #define DROP_PARTY 0x83 /* drop party */ 95 #define DROP_PARTY_ACK 0x84 /* drop party ack */ 96 97 /* Information Element Parameters in the signalling messages */ 98 #define CAUSE 0x08 /* cause */ 99 #define ENDPT_REF 0x54 /* endpoint reference */ 100 #define AAL_PARA 0x58 /* ATM adaptation layer parameters */ 101 #define TRAFF_DESCRIP 0x59 /* atm traffic descriptors */ 102 #define CONNECT_ID 0x5a /* connection identifier */ 103 #define QOS_PARA 0x5c /* quality of service parameters */ 104 #define B_HIGHER 0x5d /* broadband higher layer information */ 105 #define B_BEARER 0x5e /* broadband bearer capability */ 106 #define B_LOWER 0x5f /* broadband lower information */ 107 #define CALLING_PARTY 0x6c /* calling party number */ 108 #define CALLED_PARTY 0x70 /* called party nmber */ 109 110 #define Q2931 0x09 111 112 /* Q.2931 signalling general messages format */ 113 #define PROTO_POS 0 /* offset of protocol discriminator */ 114 #define CALL_REF_POS 2 /* offset of call reference value */ 115 #define MSG_TYPE_POS 5 /* offset of message type */ 116 #define MSG_LEN_POS 7 /* offset of mesage length */ 117 #define IE_BEGIN_POS 9 /* offset of first information element */ 118 119 /* format of signalling messages */ 120 #define TYPE_POS 0 121 #define LEN_POS 2 122 #define FIELD_BEGIN_POS 4 123 124 /* end of the original atmuni31.h */ 125 126 static const char tstr[] = "[|atm]"; 127 128 #define OAM_CRC10_MASK 0x3ff 129 #define OAM_PAYLOAD_LEN 48 130 #define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */ 131 #define OAM_CELLTYPE_FUNCTYPE_LEN 1 132 133 static const struct tok oam_f_values[] = { 134 { VCI_OAMF4SC, "OAM F4 (segment)" }, 135 { VCI_OAMF4EC, "OAM F4 (end)" }, 136 { 0, NULL } 137 }; 138 139 static const struct tok atm_pty_values[] = { 140 { 0x0, "user data, uncongested, SDU 0" }, 141 { 0x1, "user data, uncongested, SDU 1" }, 142 { 0x2, "user data, congested, SDU 0" }, 143 { 0x3, "user data, congested, SDU 1" }, 144 { 0x4, "VCC OAM F5 flow segment" }, 145 { 0x5, "VCC OAM F5 flow end-to-end" }, 146 { 0x6, "Traffic Control and resource Mgmt" }, 147 { 0, NULL } 148 }; 149 150 #define OAM_CELLTYPE_FM 0x1 151 #define OAM_CELLTYPE_PM 0x2 152 #define OAM_CELLTYPE_AD 0x8 153 #define OAM_CELLTYPE_SM 0xf 154 155 static const struct tok oam_celltype_values[] = { 156 { OAM_CELLTYPE_FM, "Fault Management" }, 157 { OAM_CELLTYPE_PM, "Performance Management" }, 158 { OAM_CELLTYPE_AD, "activate/deactivate" }, 159 { OAM_CELLTYPE_SM, "System Management" }, 160 { 0, NULL } 161 }; 162 163 #define OAM_FM_FUNCTYPE_AIS 0x0 164 #define OAM_FM_FUNCTYPE_RDI 0x1 165 #define OAM_FM_FUNCTYPE_CONTCHECK 0x4 166 #define OAM_FM_FUNCTYPE_LOOPBACK 0x8 167 168 static const struct tok oam_fm_functype_values[] = { 169 { OAM_FM_FUNCTYPE_AIS, "AIS" }, 170 { OAM_FM_FUNCTYPE_RDI, "RDI" }, 171 { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" }, 172 { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" }, 173 { 0, NULL } 174 }; 175 176 static const struct tok oam_pm_functype_values[] = { 177 { 0x0, "Forward Monitoring" }, 178 { 0x1, "Backward Reporting" }, 179 { 0x2, "Monitoring and Reporting" }, 180 { 0, NULL } 181 }; 182 183 static const struct tok oam_ad_functype_values[] = { 184 { 0x0, "Performance Monitoring" }, 185 { 0x1, "Continuity Check" }, 186 { 0, NULL } 187 }; 188 189 #define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1 190 191 static const struct tok oam_fm_loopback_indicator_values[] = { 192 { 0x0, "Reply" }, 193 { 0x1, "Request" }, 194 { 0, NULL } 195 }; 196 197 static const struct tok *oam_functype_values[16] = { 198 NULL, 199 oam_fm_functype_values, /* 1 */ 200 oam_pm_functype_values, /* 2 */ 201 NULL, 202 NULL, 203 NULL, 204 NULL, 205 NULL, 206 oam_ad_functype_values, /* 8 */ 207 NULL, 208 NULL, 209 NULL, 210 NULL, 211 NULL, 212 NULL, 213 NULL 214 }; 215 216 /* 217 * Print an RFC 1483 LLC-encapsulated ATM frame. 218 */ 219 static u_int 220 atm_llc_print(netdissect_options *ndo, 221 const u_char *p, int length, int caplen) 222 { 223 int llc_hdrlen; 224 225 llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL); 226 if (llc_hdrlen < 0) { 227 /* packet not known, print raw packet */ 228 if (!ndo->ndo_suppress_default_print) 229 ND_DEFAULTPRINT(p, caplen); 230 llc_hdrlen = -llc_hdrlen; 231 } 232 return (llc_hdrlen); 233 } 234 235 /* 236 * Given a SAP value, generate the LLC header value for a UI packet 237 * with that SAP as the source and destination SAP. 238 */ 239 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03) 240 241 /* 242 * This is the top level routine of the printer. 'p' points 243 * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp, 244 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 245 * is the number of bytes actually captured. 246 */ 247 u_int 248 atm_if_print(netdissect_options *ndo, 249 const struct pcap_pkthdr *h, const u_char *p) 250 { 251 u_int caplen = h->caplen; 252 u_int length = h->len; 253 uint32_t llchdr; 254 u_int hdrlen = 0; 255 256 if (caplen < 1 || length < 1) { 257 ND_PRINT((ndo, "%s", tstr)); 258 return (caplen); 259 } 260 261 /* Cisco Style NLPID ? */ 262 if (*p == LLC_UI) { 263 if (ndo->ndo_eflag) 264 ND_PRINT((ndo, "CNLPID ")); 265 isoclns_print(ndo, p + 1, length - 1, caplen - 1); 266 return hdrlen; 267 } 268 269 /* 270 * Must have at least a DSAP, an SSAP, and the first byte of the 271 * control field. 272 */ 273 if (caplen < 3 || length < 3) { 274 ND_PRINT((ndo, "%s", tstr)); 275 return (caplen); 276 } 277 278 /* 279 * Extract the presumed LLC header into a variable, for quick 280 * testing. 281 * Then check for a header that's neither a header for a SNAP 282 * packet nor an RFC 2684 routed NLPID-formatted PDU nor 283 * an 802.2-but-no-SNAP IP packet. 284 */ 285 llchdr = EXTRACT_24BITS(p); 286 if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) && 287 llchdr != LLC_UI_HDR(LLCSAP_ISONS) && 288 llchdr != LLC_UI_HDR(LLCSAP_IP)) { 289 /* 290 * XXX - assume 802.6 MAC header from Fore driver. 291 * 292 * Unfortunately, the above list doesn't check for 293 * all known SAPs, doesn't check for headers where 294 * the source and destination SAP aren't the same, 295 * and doesn't check for non-UI frames. It also 296 * runs the risk of an 802.6 MAC header that happens 297 * to begin with one of those values being 298 * incorrectly treated as an 802.2 header. 299 * 300 * So is that Fore driver still around? And, if so, 301 * is it still putting 802.6 MAC headers on ATM 302 * packets? If so, could it be changed to use a 303 * new DLT_IEEE802_6 value if we added it? 304 */ 305 if (caplen < 20 || length < 20) { 306 ND_PRINT((ndo, "%s", tstr)); 307 return (caplen); 308 } 309 if (ndo->ndo_eflag) 310 ND_PRINT((ndo, "%08x%08x %08x%08x ", 311 EXTRACT_32BITS(p), 312 EXTRACT_32BITS(p+4), 313 EXTRACT_32BITS(p+8), 314 EXTRACT_32BITS(p+12))); 315 p += 20; 316 length -= 20; 317 caplen -= 20; 318 hdrlen += 20; 319 } 320 hdrlen += atm_llc_print(ndo, p, length, caplen); 321 return (hdrlen); 322 } 323 324 /* 325 * ATM signalling. 326 */ 327 static const struct tok msgtype2str[] = { 328 { CALL_PROCEED, "Call_proceeding" }, 329 { CONNECT, "Connect" }, 330 { CONNECT_ACK, "Connect_ack" }, 331 { SETUP, "Setup" }, 332 { RELEASE, "Release" }, 333 { RELEASE_DONE, "Release_complete" }, 334 { RESTART, "Restart" }, 335 { RESTART_ACK, "Restart_ack" }, 336 { STATUS, "Status" }, 337 { STATUS_ENQ, "Status_enquiry" }, 338 { ADD_PARTY, "Add_party" }, 339 { ADD_PARTY_ACK, "Add_party_ack" }, 340 { ADD_PARTY_REJ, "Add_party_reject" }, 341 { DROP_PARTY, "Drop_party" }, 342 { DROP_PARTY_ACK, "Drop_party_ack" }, 343 { 0, NULL } 344 }; 345 346 static void 347 sig_print(netdissect_options *ndo, 348 const u_char *p) 349 { 350 uint32_t call_ref; 351 352 ND_TCHECK(p[PROTO_POS]); 353 if (p[PROTO_POS] == Q2931) { 354 /* 355 * protocol:Q.2931 for User to Network Interface 356 * (UNI 3.1) signalling 357 */ 358 ND_PRINT((ndo, "Q.2931")); 359 ND_TCHECK(p[MSG_TYPE_POS]); 360 ND_PRINT((ndo, ":%s ", 361 tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]))); 362 363 /* 364 * The call reference comes before the message type, 365 * so if we know we have the message type, which we 366 * do from the caplen test above, we also know we have 367 * the call reference. 368 */ 369 call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]); 370 ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref)); 371 } else { 372 /* SCCOP with some unknown protocol atop it */ 373 ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS])); 374 } 375 return; 376 377 trunc: 378 ND_PRINT((ndo, " %s", tstr)); 379 } 380 381 /* 382 * Print an ATM PDU (such as an AAL5 PDU). 383 */ 384 void 385 atm_print(netdissect_options *ndo, 386 u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length, 387 u_int caplen) 388 { 389 if (ndo->ndo_eflag) 390 ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci)); 391 392 if (vpi == 0) { 393 switch (vci) { 394 395 case VCI_PPC: 396 sig_print(ndo, p); 397 return; 398 399 case VCI_BCC: 400 ND_PRINT((ndo, "broadcast sig: ")); 401 return; 402 403 case VCI_OAMF4SC: /* fall through */ 404 case VCI_OAMF4EC: 405 oam_print(ndo, p, length, ATM_OAM_HEC); 406 return; 407 408 case VCI_METAC: 409 ND_PRINT((ndo, "meta: ")); 410 return; 411 412 case VCI_ILMIC: 413 ND_PRINT((ndo, "ilmi: ")); 414 snmp_print(ndo, p, length); 415 return; 416 } 417 } 418 419 switch (traftype) { 420 421 case ATM_LLC: 422 default: 423 /* 424 * Assumes traffic is LLC if unknown. 425 */ 426 atm_llc_print(ndo, p, length, caplen); 427 break; 428 429 case ATM_LANE: 430 lane_print(ndo, p, length, caplen); 431 break; 432 } 433 } 434 435 struct oam_fm_loopback_t { 436 uint8_t loopback_indicator; 437 uint8_t correlation_tag[4]; 438 uint8_t loopback_id[12]; 439 uint8_t source_id[12]; 440 uint8_t unused[16]; 441 }; 442 443 struct oam_fm_ais_rdi_t { 444 uint8_t failure_type; 445 uint8_t failure_location[16]; 446 uint8_t unused[28]; 447 }; 448 449 void 450 oam_print (netdissect_options *ndo, 451 const u_char *p, u_int length, u_int hec) 452 { 453 uint32_t cell_header; 454 uint16_t vpi, vci, cksum, cksum_shouldbe, idx; 455 uint8_t cell_type, func_type, payload, clp; 456 457 union { 458 const struct oam_fm_loopback_t *oam_fm_loopback; 459 const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi; 460 } oam_ptr; 461 462 463 ND_TCHECK(*(p+ATM_HDR_LEN_NOHEC+hec)); 464 cell_header = EXTRACT_32BITS(p+hec); 465 cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f; 466 func_type = (*(p+ATM_HDR_LEN_NOHEC+hec)) & 0x0f; 467 468 vpi = (cell_header>>20)&0xff; 469 vci = (cell_header>>4)&0xffff; 470 payload = (cell_header>>1)&0x7; 471 clp = cell_header&0x1; 472 473 ND_PRINT((ndo, "%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u", 474 tok2str(oam_f_values, "OAM F5", vci), 475 vpi, vci, 476 tok2str(atm_pty_values, "Unknown", payload), 477 clp, length)); 478 479 if (!ndo->ndo_vflag) { 480 return; 481 } 482 483 ND_PRINT((ndo, "\n\tcell-type %s (%u)", 484 tok2str(oam_celltype_values, "unknown", cell_type), 485 cell_type)); 486 487 if (oam_functype_values[cell_type] == NULL) 488 ND_PRINT((ndo, ", func-type unknown (%u)", func_type)); 489 else 490 ND_PRINT((ndo, ", func-type %s (%u)", 491 tok2str(oam_functype_values[cell_type],"none",func_type), 492 func_type)); 493 494 p += ATM_HDR_LEN_NOHEC + hec; 495 496 switch (cell_type << 4 | func_type) { 497 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK): 498 oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN); 499 ND_TCHECK(*oam_ptr.oam_fm_loopback); 500 ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x", 501 tok2str(oam_fm_loopback_indicator_values, 502 "Unknown", 503 oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK), 504 EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag))); 505 ND_PRINT((ndo, "\n\tLocation-ID ")); 506 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) { 507 if (idx % 2) { 508 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx]))); 509 } 510 } 511 ND_PRINT((ndo, "\n\tSource-ID ")); 512 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) { 513 if (idx % 2) { 514 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->source_id[idx]))); 515 } 516 } 517 break; 518 519 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS): 520 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI): 521 oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN); 522 ND_TCHECK(*oam_ptr.oam_fm_ais_rdi); 523 ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type)); 524 ND_PRINT((ndo, "\n\tLocation-ID ")); 525 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) { 526 if (idx % 2) { 527 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx]))); 528 } 529 } 530 break; 531 532 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK): 533 /* FIXME */ 534 break; 535 536 default: 537 break; 538 } 539 540 /* crc10 checksum verification */ 541 ND_TCHECK2(*(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN), 2); 542 cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN) 543 & OAM_CRC10_MASK; 544 cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN); 545 546 ND_PRINT((ndo, "\n\tcksum 0x%03x (%scorrect)", 547 cksum, 548 cksum_shouldbe == 0 ? "" : "in")); 549 550 return; 551 552 trunc: 553 ND_PRINT((ndo, "[|oam]")); 554 return; 555 } 556
