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 #include <sys/cdefs.h> 23 #ifndef lint 24 __RCSID("$NetBSD: print-atm.c,v 1.11 2024/09/02 16:15:30 christos Exp $"); 25 #endif 26 27 /* \summary: Asynchronous Transfer Mode (ATM) printer */ 28 29 #include <config.h> 30 31 #include "netdissect-stdinc.h" 32 33 #define ND_LONGJMP_FROM_TCHECK 34 #include "netdissect.h" 35 #include "extract.h" 36 #include "addrtoname.h" 37 #include "atm.h" 38 #include "llc.h" 39 40 /* start of the original atmuni31.h */ 41 42 /* 43 * Copyright (c) 1997 Yen Yen Lim and North Dakota State University 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by Yen Yen Lim and 57 North Dakota State University 58 * 4. The name of the author may not be used to endorse or promote products 59 * derived from this software without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 63 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 64 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 65 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 66 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 67 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 69 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 70 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 71 * POSSIBILITY OF SUCH DAMAGE. 72 */ 73 74 /* Based on UNI3.1 standard by ATM Forum */ 75 76 /* ATM traffic types based on VPI=0 and (the following VCI */ 77 #define VCI_PPC 0x05 /* Point-to-point signal msg */ 78 #define VCI_BCC 0x02 /* Broadcast signal msg */ 79 #define VCI_OAMF4SC 0x03 /* Segment OAM F4 flow cell */ 80 #define VCI_OAMF4EC 0x04 /* End-to-end OAM F4 flow cell */ 81 #define VCI_METAC 0x01 /* Meta signal msg */ 82 #define VCI_ILMIC 0x10 /* ILMI msg */ 83 84 /* Q.2931 signalling messages */ 85 #define CALL_PROCEED 0x02 /* call proceeding */ 86 #define CONNECT 0x07 /* connect */ 87 #define CONNECT_ACK 0x0f /* connect_ack */ 88 #define SETUP 0x05 /* setup */ 89 #define RELEASE 0x4d /* release */ 90 #define RELEASE_DONE 0x5a /* release_done */ 91 #define RESTART 0x46 /* restart */ 92 #define RESTART_ACK 0x4e /* restart ack */ 93 #define STATUS 0x7d /* status */ 94 #define STATUS_ENQ 0x75 /* status ack */ 95 #define ADD_PARTY 0x80 /* add party */ 96 #define ADD_PARTY_ACK 0x81 /* add party ack */ 97 #define ADD_PARTY_REJ 0x82 /* add party rej */ 98 #define DROP_PARTY 0x83 /* drop party */ 99 #define DROP_PARTY_ACK 0x84 /* drop party ack */ 100 101 /* Information Element Parameters in the signalling messages */ 102 #define CAUSE 0x08 /* cause */ 103 #define ENDPT_REF 0x54 /* endpoint reference */ 104 #define AAL_PARA 0x58 /* ATM adaptation layer parameters */ 105 #define TRAFF_DESCRIP 0x59 /* atm traffic descriptors */ 106 #define CONNECT_ID 0x5a /* connection identifier */ 107 #define QOS_PARA 0x5c /* quality of service parameters */ 108 #define B_HIGHER 0x5d /* broadband higher layer information */ 109 #define B_BEARER 0x5e /* broadband bearer capability */ 110 #define B_LOWER 0x5f /* broadband lower information */ 111 #define CALLING_PARTY 0x6c /* calling party number */ 112 #define CALLED_PARTY 0x70 /* called party number */ 113 114 #define Q2931 0x09 115 116 /* Q.2931 signalling general messages format */ 117 #define PROTO_POS 0 /* offset of protocol discriminator */ 118 #define CALL_REF_POS 2 /* offset of call reference value */ 119 #define MSG_TYPE_POS 5 /* offset of message type */ 120 #if 0 121 #define MSG_LEN_POS 7 /* offset of message length */ 122 #define IE_BEGIN_POS 9 /* offset of first information element */ 123 124 /* format of signalling messages */ 125 #define TYPE_POS 0 126 #define LEN_POS 2 127 #define FIELD_BEGIN_POS 4 128 #endif 129 130 /* end of the original atmuni31.h */ 131 132 133 #define OAM_CRC10_MASK 0x3ff 134 #define OAM_PAYLOAD_LEN 48 135 #define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */ 136 #define OAM_CELLTYPE_FUNCTYPE_LEN 1 137 138 static const struct tok oam_f_values[] = { 139 { VCI_OAMF4SC, "OAM F4 (segment)" }, 140 { VCI_OAMF4EC, "OAM F4 (end)" }, 141 { 0, NULL } 142 }; 143 144 static const struct tok atm_pty_values[] = { 145 { 0x0, "user data, uncongested, SDU 0" }, 146 { 0x1, "user data, uncongested, SDU 1" }, 147 { 0x2, "user data, congested, SDU 0" }, 148 { 0x3, "user data, congested, SDU 1" }, 149 { 0x4, "VCC OAM F5 flow segment" }, 150 { 0x5, "VCC OAM F5 flow end-to-end" }, 151 { 0x6, "Traffic Control and resource Mgmt" }, 152 { 0, NULL } 153 }; 154 155 #define OAM_CELLTYPE_FM 0x1 156 #define OAM_CELLTYPE_PM 0x2 157 #define OAM_CELLTYPE_AD 0x8 158 #define OAM_CELLTYPE_SM 0xf 159 160 static const struct tok oam_celltype_values[] = { 161 { OAM_CELLTYPE_FM, "Fault Management" }, 162 { OAM_CELLTYPE_PM, "Performance Management" }, 163 { OAM_CELLTYPE_AD, "activate/deactivate" }, 164 { OAM_CELLTYPE_SM, "System Management" }, 165 { 0, NULL } 166 }; 167 168 #define OAM_FM_FUNCTYPE_AIS 0x0 169 #define OAM_FM_FUNCTYPE_RDI 0x1 170 #define OAM_FM_FUNCTYPE_CONTCHECK 0x4 171 #define OAM_FM_FUNCTYPE_LOOPBACK 0x8 172 173 static const struct tok oam_fm_functype_values[] = { 174 { OAM_FM_FUNCTYPE_AIS, "AIS" }, 175 { OAM_FM_FUNCTYPE_RDI, "RDI" }, 176 { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" }, 177 { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" }, 178 { 0, NULL } 179 }; 180 181 static const struct tok oam_pm_functype_values[] = { 182 { 0x0, "Forward Monitoring" }, 183 { 0x1, "Backward Reporting" }, 184 { 0x2, "Monitoring and Reporting" }, 185 { 0, NULL } 186 }; 187 188 static const struct tok oam_ad_functype_values[] = { 189 { 0x0, "Performance Monitoring" }, 190 { 0x1, "Continuity Check" }, 191 { 0, NULL } 192 }; 193 194 #define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1 195 196 static const struct tok oam_fm_loopback_indicator_values[] = { 197 { 0x0, "Reply" }, 198 { 0x1, "Request" }, 199 { 0, NULL } 200 }; 201 202 static const struct uint_tokary oam_celltype2tokary[] = { 203 { OAM_CELLTYPE_FM, oam_fm_functype_values }, 204 { OAM_CELLTYPE_PM, oam_pm_functype_values }, 205 { OAM_CELLTYPE_AD, oam_ad_functype_values }, 206 /* uint2tokary() does not use array termination. */ 207 }; 208 209 /* 210 * Print an RFC 1483 LLC-encapsulated ATM frame. 211 */ 212 static u_int 213 atm_llc_print(netdissect_options *ndo, 214 const u_char *p, int length, int caplen) 215 { 216 int llc_hdrlen; 217 218 llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL); 219 if (llc_hdrlen < 0) { 220 /* packet not known, print raw packet */ 221 if (!ndo->ndo_suppress_default_print) 222 ND_DEFAULTPRINT(p, caplen); 223 llc_hdrlen = -llc_hdrlen; 224 } 225 return (llc_hdrlen); 226 } 227 228 /* 229 * Given a SAP value, generate the LLC header value for a UI packet 230 * with that SAP as the source and destination SAP. 231 */ 232 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03) 233 234 /* 235 * This is the top level routine of the printer. 'p' points 236 * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp, 237 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 238 * is the number of bytes actually captured. 239 */ 240 void 241 atm_if_print(netdissect_options *ndo, 242 const struct pcap_pkthdr *h, const u_char *p) 243 { 244 u_int caplen = h->caplen; 245 u_int length = h->len; 246 uint32_t llchdr; 247 u_int hdrlen = 0; 248 249 ndo->ndo_protocol = "atm"; 250 251 /* Cisco Style NLPID ? */ 252 if (GET_U_1(p) == LLC_UI) { 253 if (ndo->ndo_eflag) 254 ND_PRINT("CNLPID "); 255 ndo->ndo_ll_hdr_len += 1; 256 isoclns_print(ndo, p + 1, length - 1); 257 return; 258 } 259 260 /* 261 * Must have at least a DSAP, an SSAP, and the first byte of the 262 * control field. 263 */ 264 265 /* 266 * Extract the presumed LLC header into a variable, for quick 267 * testing. 268 * Then check for a header that's neither a header for a SNAP 269 * packet nor an RFC 2684 routed NLPID-formatted PDU nor 270 * an 802.2-but-no-SNAP IP packet. 271 */ 272 llchdr = GET_BE_U_3(p); 273 if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) && 274 llchdr != LLC_UI_HDR(LLCSAP_ISONS) && 275 llchdr != LLC_UI_HDR(LLCSAP_IP)) { 276 /* 277 * XXX - assume 802.6 MAC header from Fore driver. 278 * 279 * Unfortunately, the above list doesn't check for 280 * all known SAPs, doesn't check for headers where 281 * the source and destination SAP aren't the same, 282 * and doesn't check for non-UI frames. It also 283 * runs the risk of an 802.6 MAC header that happens 284 * to begin with one of those values being 285 * incorrectly treated as an 802.2 header. 286 * 287 * So is that Fore driver still around? And, if so, 288 * is it still putting 802.6 MAC headers on ATM 289 * packets? If so, could it be changed to use a 290 * new DLT_IEEE802_6 value if we added it? 291 */ 292 if (ndo->ndo_eflag) 293 ND_PRINT("%08x%08x %08x%08x ", 294 GET_BE_U_4(p), 295 GET_BE_U_4(p + 4), 296 GET_BE_U_4(p + 8), 297 GET_BE_U_4(p + 12)); 298 /* Always cover the full header. */ 299 ND_TCHECK_LEN(p, 20); 300 p += 20; 301 length -= 20; 302 caplen -= 20; 303 hdrlen += 20; 304 } 305 ndo->ndo_ll_hdr_len += hdrlen; 306 ndo->ndo_ll_hdr_len += atm_llc_print(ndo, p, length, caplen); 307 } 308 309 /* 310 * ATM signalling. 311 */ 312 static const struct tok msgtype2str[] = { 313 { CALL_PROCEED, "Call_proceeding" }, 314 { CONNECT, "Connect" }, 315 { CONNECT_ACK, "Connect_ack" }, 316 { SETUP, "Setup" }, 317 { RELEASE, "Release" }, 318 { RELEASE_DONE, "Release_complete" }, 319 { RESTART, "Restart" }, 320 { RESTART_ACK, "Restart_ack" }, 321 { STATUS, "Status" }, 322 { STATUS_ENQ, "Status_enquiry" }, 323 { ADD_PARTY, "Add_party" }, 324 { ADD_PARTY_ACK, "Add_party_ack" }, 325 { ADD_PARTY_REJ, "Add_party_reject" }, 326 { DROP_PARTY, "Drop_party" }, 327 { DROP_PARTY_ACK, "Drop_party_ack" }, 328 { 0, NULL } 329 }; 330 331 static void 332 sig_print(netdissect_options *ndo, 333 const u_char *p) 334 { 335 uint32_t call_ref; 336 337 if (GET_U_1(p + PROTO_POS) == Q2931) { 338 /* 339 * protocol:Q.2931 for User to Network Interface 340 * (UNI 3.1) signalling 341 */ 342 ND_PRINT("Q.2931"); 343 ND_PRINT(":%s ", 344 tok2str(msgtype2str, "msgtype#%u", GET_U_1(p + MSG_TYPE_POS))); 345 346 /* 347 * The call reference comes before the message type, 348 * so if we know we have the message type, which we 349 * do from the caplen test above, we also know we have 350 * the call reference. 351 */ 352 call_ref = GET_BE_U_3(p + CALL_REF_POS); 353 ND_PRINT("CALL_REF:0x%06x", call_ref); 354 } else { 355 /* SSCOP with some unknown protocol atop it */ 356 ND_PRINT("SSCOP, proto %u ", GET_U_1(p + PROTO_POS)); 357 } 358 } 359 360 /* 361 * Print an ATM PDU (such as an AAL5 PDU). 362 */ 363 void 364 atm_print(netdissect_options *ndo, 365 u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length, 366 u_int caplen) 367 { 368 ndo->ndo_protocol = "atm"; 369 if (ndo->ndo_eflag) 370 ND_PRINT("VPI:%u VCI:%u ", vpi, vci); 371 372 if (vpi == 0) { 373 switch (vci) { 374 375 case VCI_PPC: 376 sig_print(ndo, p); 377 return; 378 379 case VCI_BCC: 380 ND_PRINT("broadcast sig: "); 381 return; 382 383 case VCI_OAMF4SC: /* fall through */ 384 case VCI_OAMF4EC: 385 oam_print(ndo, p, length, ATM_OAM_HEC); 386 return; 387 388 case VCI_METAC: 389 ND_PRINT("meta: "); 390 return; 391 392 case VCI_ILMIC: 393 ND_PRINT("ilmi: "); 394 snmp_print(ndo, p, length); 395 return; 396 } 397 } 398 399 switch (traftype) { 400 401 case ATM_LLC: 402 default: 403 /* 404 * Assumes traffic is LLC if unknown. 405 */ 406 atm_llc_print(ndo, p, length, caplen); 407 break; 408 409 case ATM_LANE: 410 lane_print(ndo, p, length, caplen); 411 break; 412 } 413 } 414 415 struct oam_fm_loopback_t { 416 nd_uint8_t loopback_indicator; 417 nd_uint32_t correlation_tag; 418 nd_byte loopback_id[12]; 419 nd_byte source_id[12]; 420 nd_byte unused[16]; 421 }; 422 423 struct oam_fm_ais_rdi_t { 424 nd_uint8_t failure_type; 425 nd_byte failure_location[16]; 426 nd_byte unused[28]; 427 }; 428 429 void 430 oam_print(netdissect_options *ndo, 431 const u_char *p, u_int length, u_int hec) 432 { 433 uint32_t cell_header; 434 uint16_t vpi, vci, cksum, cksum_shouldbe, idx; 435 uint8_t cell_type, func_type, payload, clp; 436 const struct tok *oam_functype_str; 437 438 union { 439 const struct oam_fm_loopback_t *oam_fm_loopback; 440 const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi; 441 } oam_ptr; 442 443 ndo->ndo_protocol = "oam"; 444 cell_header = GET_BE_U_4(p + hec); 445 cell_type = (GET_U_1((p + ATM_HDR_LEN_NOHEC + hec)) >> 4) & 0x0f; 446 func_type = GET_U_1((p + ATM_HDR_LEN_NOHEC + hec)) & 0x0f; 447 448 vpi = (cell_header>>20)&0xff; 449 vci = (cell_header>>4)&0xffff; 450 payload = (cell_header>>1)&0x7; 451 clp = cell_header&0x1; 452 453 ND_PRINT("%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u", 454 tok2str(oam_f_values, "OAM F5", vci), 455 vpi, vci, 456 tok2str(atm_pty_values, "Unknown", payload), 457 clp, length); 458 459 if (!ndo->ndo_vflag) { 460 return; 461 } 462 463 ND_PRINT("\n\tcell-type %s (%u)", 464 tok2str(oam_celltype_values, "unknown", cell_type), 465 cell_type); 466 467 oam_functype_str = uint2tokary(oam_celltype2tokary, cell_type); 468 if (oam_functype_str == NULL) 469 ND_PRINT(", func-type unknown (%u)", func_type); 470 else 471 ND_PRINT(", func-type %s (%u)", 472 tok2str(oam_functype_str, "none", func_type), 473 func_type); 474 475 p += ATM_HDR_LEN_NOHEC + hec; 476 477 switch (cell_type << 4 | func_type) { 478 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK): 479 oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN); 480 ND_TCHECK_SIZE(oam_ptr.oam_fm_loopback); 481 ND_PRINT("\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x", 482 tok2str(oam_fm_loopback_indicator_values, 483 "Unknown", 484 GET_U_1(oam_ptr.oam_fm_loopback->loopback_indicator) & OAM_FM_LOOPBACK_INDICATOR_MASK), 485 GET_BE_U_4(oam_ptr.oam_fm_loopback->correlation_tag)); 486 ND_PRINT("\n\tLocation-ID "); 487 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) { 488 if (idx % 2) { 489 ND_PRINT("%04x ", 490 GET_BE_U_2(&oam_ptr.oam_fm_loopback->loopback_id[idx])); 491 } 492 } 493 ND_PRINT("\n\tSource-ID "); 494 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) { 495 if (idx % 2) { 496 ND_PRINT("%04x ", 497 GET_BE_U_2(&oam_ptr.oam_fm_loopback->source_id[idx])); 498 } 499 } 500 break; 501 502 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS): 503 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI): 504 oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN); 505 ND_TCHECK_SIZE(oam_ptr.oam_fm_ais_rdi); 506 ND_PRINT("\n\tFailure-type 0x%02x", 507 GET_U_1(oam_ptr.oam_fm_ais_rdi->failure_type)); 508 ND_PRINT("\n\tLocation-ID "); 509 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) { 510 if (idx % 2) { 511 ND_PRINT("%04x ", 512 GET_BE_U_2(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])); 513 } 514 } 515 break; 516 517 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK): 518 /* FIXME */ 519 break; 520 521 default: 522 break; 523 } 524 525 /* crc10 checksum verification */ 526 cksum = GET_BE_U_2(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN) 527 & OAM_CRC10_MASK; 528 cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN); 529 530 ND_PRINT("\n\tcksum 0x%03x (%scorrect)", 531 cksum, 532 cksum_shouldbe == 0 ? "" : "in"); 533 } 534
Indexes created Fri Oct 02 00:25:19 UTC 2026