1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 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: Ethernet 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 "ethertype.h" 34 #include "ether.h" 35 36 const struct tok ethertype_values[] = { 37 { ETHERTYPE_IP, "IPv4" }, 38 { ETHERTYPE_MPLS, "MPLS unicast" }, 39 { ETHERTYPE_MPLS_MULTI, "MPLS multicast" }, 40 { ETHERTYPE_IPV6, "IPv6" }, 41 { ETHERTYPE_8021Q, "802.1Q" }, 42 { ETHERTYPE_8021Q9100, "802.1Q-9100" }, 43 { ETHERTYPE_8021QinQ, "802.1Q-QinQ" }, 44 { ETHERTYPE_8021Q9200, "802.1Q-9200" }, 45 { ETHERTYPE_VMAN, "VMAN" }, 46 { ETHERTYPE_PUP, "PUP" }, 47 { ETHERTYPE_ARP, "ARP"}, 48 { ETHERTYPE_REVARP, "Reverse ARP"}, 49 { ETHERTYPE_NS, "NS" }, 50 { ETHERTYPE_SPRITE, "Sprite" }, 51 { ETHERTYPE_TRAIL, "Trail" }, 52 { ETHERTYPE_MOPDL, "MOP DL" }, 53 { ETHERTYPE_MOPRC, "MOP RC" }, 54 { ETHERTYPE_DN, "DN" }, 55 { ETHERTYPE_LAT, "LAT" }, 56 { ETHERTYPE_SCA, "SCA" }, 57 { ETHERTYPE_TEB, "TEB" }, 58 { ETHERTYPE_LANBRIDGE, "Lanbridge" }, 59 { ETHERTYPE_DECDNS, "DEC DNS" }, 60 { ETHERTYPE_DECDTS, "DEC DTS" }, 61 { ETHERTYPE_VEXP, "VEXP" }, 62 { ETHERTYPE_VPROD, "VPROD" }, 63 { ETHERTYPE_ATALK, "Appletalk" }, 64 { ETHERTYPE_AARP, "Appletalk ARP" }, 65 { ETHERTYPE_IPX, "IPX" }, 66 { ETHERTYPE_PPP, "PPP" }, 67 { ETHERTYPE_MPCP, "MPCP" }, 68 { ETHERTYPE_SLOW, "Slow Protocols" }, 69 { ETHERTYPE_PPPOED, "PPPoE D" }, 70 { ETHERTYPE_PPPOES, "PPPoE S" }, 71 { ETHERTYPE_EAPOL, "EAPOL" }, 72 { ETHERTYPE_RRCP, "RRCP" }, 73 { ETHERTYPE_MS_NLB_HB, "MS NLB heartbeat" }, 74 { ETHERTYPE_JUMBO, "Jumbo" }, 75 { ETHERTYPE_LOOPBACK, "Loopback" }, 76 { ETHERTYPE_ISO, "OSI" }, 77 { ETHERTYPE_GRE_ISO, "GRE-OSI" }, 78 { ETHERTYPE_CFM_OLD, "CFM (old)" }, 79 { ETHERTYPE_CFM, "CFM" }, 80 { ETHERTYPE_IEEE1905_1, "IEEE1905.1" }, 81 { ETHERTYPE_LLDP, "LLDP" }, 82 { ETHERTYPE_TIPC, "TIPC"}, 83 { ETHERTYPE_GEONET_OLD, "GeoNet (old)"}, 84 { ETHERTYPE_GEONET, "GeoNet"}, 85 { ETHERTYPE_CALM_FAST, "CALM FAST"}, 86 { ETHERTYPE_AOE, "AoE" }, 87 { ETHERTYPE_MEDSA, "MEDSA" }, 88 { 0, NULL} 89 }; 90 91 static inline void 92 ether_hdr_print(netdissect_options *ndo, 93 const u_char *bp, u_int length) 94 { 95 register const struct ether_header *ep; 96 uint16_t length_type; 97 98 ep = (const struct ether_header *)bp; 99 100 ND_PRINT((ndo, "%s > %s", 101 etheraddr_string(ndo, ESRC(ep)), 102 etheraddr_string(ndo, EDST(ep)))); 103 104 length_type = EXTRACT_16BITS(&ep->ether_length_type); 105 if (!ndo->ndo_qflag) { 106 if (length_type <= ETHERMTU) { 107 ND_PRINT((ndo, ", 802.3")); 108 length = length_type; 109 } else 110 ND_PRINT((ndo, ", ethertype %s (0x%04x)", 111 tok2str(ethertype_values,"Unknown", length_type), 112 length_type)); 113 } else { 114 if (length_type <= ETHERMTU) { 115 ND_PRINT((ndo, ", 802.3")); 116 length = length_type; 117 } else 118 ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", length_type))); 119 } 120 121 ND_PRINT((ndo, ", length %u: ", length)); 122 } 123 124 /* 125 * Print an Ethernet frame. 126 * This might be encapsulated within another frame; we might be passed 127 * a pointer to a function that can print header information for that 128 * frame's protocol, and an argument to pass to that function. 129 * 130 * FIXME: caplen can and should be derived from ndo->ndo_snapend and p. 131 */ 132 u_int 133 ether_print(netdissect_options *ndo, 134 const u_char *p, u_int length, u_int caplen, 135 void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg) 136 { 137 const struct ether_header *ep; 138 u_int orig_length; 139 u_short length_type; 140 u_int hdrlen; 141 int llc_hdrlen; 142 struct lladdr_info src, dst; 143 144 if (caplen < ETHER_HDRLEN) { 145 ND_PRINT((ndo, "[|ether]")); 146 return (caplen); 147 } 148 if (length < ETHER_HDRLEN) { 149 ND_PRINT((ndo, "[|ether]")); 150 return (length); 151 } 152 153 if (ndo->ndo_eflag) { 154 if (print_encap_header != NULL) 155 (*print_encap_header)(ndo, encap_header_arg); 156 ether_hdr_print(ndo, p, length); 157 } 158 orig_length = length; 159 160 length -= ETHER_HDRLEN; 161 caplen -= ETHER_HDRLEN; 162 ep = (const struct ether_header *)p; 163 p += ETHER_HDRLEN; 164 hdrlen = ETHER_HDRLEN; 165 166 src.addr = ESRC(ep); 167 src.addr_string = etheraddr_string; 168 dst.addr = EDST(ep); 169 dst.addr_string = etheraddr_string; 170 length_type = EXTRACT_16BITS(&ep->ether_length_type); 171 172 recurse: 173 /* 174 * Is it (gag) an 802.3 encapsulation? 175 */ 176 if (length_type <= ETHERMTU) { 177 /* Try to print the LLC-layer header & higher layers */ 178 llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst); 179 if (llc_hdrlen < 0) { 180 /* packet type not known, print raw packet */ 181 if (!ndo->ndo_suppress_default_print) 182 ND_DEFAULTPRINT(p, caplen); 183 llc_hdrlen = -llc_hdrlen; 184 } 185 hdrlen += llc_hdrlen; 186 } else if (length_type == ETHERTYPE_8021Q || 187 length_type == ETHERTYPE_8021Q9100 || 188 length_type == ETHERTYPE_8021Q9200 || 189 length_type == ETHERTYPE_8021QinQ) { 190 /* 191 * Print VLAN information, and then go back and process 192 * the enclosed type field. 193 */ 194 if (caplen < 4) { 195 ND_PRINT((ndo, "[|vlan]")); 196 return (hdrlen + caplen); 197 } 198 if (length < 4) { 199 ND_PRINT((ndo, "[|vlan]")); 200 return (hdrlen + length); 201 } 202 if (ndo->ndo_eflag) { 203 uint16_t tag = EXTRACT_16BITS(p); 204 205 ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag))); 206 } 207 208 length_type = EXTRACT_16BITS(p + 2); 209 if (ndo->ndo_eflag && length_type > ETHERMTU) 210 ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", length_type))); 211 p += 4; 212 length -= 4; 213 caplen -= 4; 214 hdrlen += 4; 215 goto recurse; 216 } else if (length_type == ETHERTYPE_JUMBO) { 217 /* 218 * Alteon jumbo frames. 219 * See 220 * 221 * http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01 222 * 223 * which indicates that, following the type field, 224 * there's an LLC header and payload. 225 */ 226 /* Try to print the LLC-layer header & higher layers */ 227 llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst); 228 if (llc_hdrlen < 0) { 229 /* packet type not known, print raw packet */ 230 if (!ndo->ndo_suppress_default_print) 231 ND_DEFAULTPRINT(p, caplen); 232 llc_hdrlen = -llc_hdrlen; 233 } 234 hdrlen += llc_hdrlen; 235 } else { 236 if (ethertype_print(ndo, length_type, p, length, caplen, &src, &dst) == 0) { 237 /* type not known, print raw packet */ 238 if (!ndo->ndo_eflag) { 239 if (print_encap_header != NULL) 240 (*print_encap_header)(ndo, encap_header_arg); 241 ether_hdr_print(ndo, (const u_char *)ep, orig_length); 242 } 243 244 if (!ndo->ndo_suppress_default_print) 245 ND_DEFAULTPRINT(p, caplen); 246 } 247 } 248 return (hdrlen); 249 } 250 251 /* 252 * This is the top level routine of the printer. 'p' points 253 * to the ether header of the packet, 'h->len' is the length 254 * of the packet off the wire, and 'h->caplen' is the number 255 * of bytes actually captured. 256 */ 257 u_int 258 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 259 const u_char *p) 260 { 261 return (ether_print(ndo, p, h->len, h->caplen, NULL, NULL)); 262 } 263 264 /* 265 * This is the top level routine of the printer. 'p' points 266 * to the ether header of the packet, 'h->len' is the length 267 * of the packet off the wire, and 'h->caplen' is the number 268 * of bytes actually captured. 269 * 270 * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header 271 * before the Ethernet header. 272 */ 273 u_int 274 netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 275 const u_char *p) 276 { 277 /* 278 * Fail if we don't have enough data for the Hilscher pseudo-header. 279 */ 280 if (h->len < 4 || h->caplen < 4) { 281 ND_PRINT((ndo, "[|netanalyzer]")); 282 return (h->caplen); 283 } 284 285 /* Skip the pseudo-header. */ 286 return (4 + ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL)); 287 } 288 289 /* 290 * This is the top level routine of the printer. 'p' points 291 * to the ether header of the packet, 'h->len' is the length 292 * of the packet off the wire, and 'h->caplen' is the number 293 * of bytes actually captured. 294 * 295 * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte 296 * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF 297 * before the Ethernet header. 298 */ 299 u_int 300 netanalyzer_transparent_if_print(netdissect_options *ndo, 301 const struct pcap_pkthdr *h, 302 const u_char *p) 303 { 304 /* 305 * Fail if we don't have enough data for the Hilscher pseudo-header, 306 * preamble, and SOF. 307 */ 308 if (h->len < 12 || h->caplen < 12) { 309 ND_PRINT((ndo, "[|netanalyzer-transparent]")); 310 return (h->caplen); 311 } 312 313 /* Skip the pseudo-header, preamble, and SOF. */ 314 return (12 + ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL)); 315 } 316 317 /* 318 * Prints the packet payload, given an Ethernet type code for the payload's 319 * protocol. 320 * 321 * Returns non-zero if it can do so, zero if the ethertype is unknown. 322 */ 323 324 int 325 ethertype_print(netdissect_options *ndo, 326 u_short ether_type, const u_char *p, 327 u_int length, u_int caplen, 328 const struct lladdr_info *src, const struct lladdr_info *dst) 329 { 330 switch (ether_type) { 331 332 case ETHERTYPE_IP: 333 ip_print(ndo, p, length); 334 return (1); 335 336 case ETHERTYPE_IPV6: 337 ip6_print(ndo, p, length); 338 return (1); 339 340 case ETHERTYPE_ARP: 341 case ETHERTYPE_REVARP: 342 arp_print(ndo, p, length, caplen); 343 return (1); 344 345 case ETHERTYPE_DN: 346 decnet_print(ndo, p, length, caplen); 347 return (1); 348 349 case ETHERTYPE_ATALK: 350 if (ndo->ndo_vflag) 351 ND_PRINT((ndo, "et1 ")); 352 atalk_print(ndo, p, length); 353 return (1); 354 355 case ETHERTYPE_AARP: 356 aarp_print(ndo, p, length); 357 return (1); 358 359 case ETHERTYPE_IPX: 360 ND_PRINT((ndo, "(NOV-ETHII) ")); 361 ipx_print(ndo, p, length); 362 return (1); 363 364 case ETHERTYPE_ISO: 365 if (length == 0 || caplen == 0) { 366 ND_PRINT((ndo, " [|osi]")); 367 return (1); 368 } 369 isoclns_print(ndo, p + 1, length - 1); 370 return(1); 371 372 case ETHERTYPE_PPPOED: 373 case ETHERTYPE_PPPOES: 374 case ETHERTYPE_PPPOED2: 375 case ETHERTYPE_PPPOES2: 376 pppoe_print(ndo, p, length); 377 return (1); 378 379 case ETHERTYPE_EAPOL: 380 eap_print(ndo, p, length); 381 return (1); 382 383 case ETHERTYPE_RRCP: 384 rrcp_print(ndo, p, length, src, dst); 385 return (1); 386 387 case ETHERTYPE_PPP: 388 if (length) { 389 ND_PRINT((ndo, ": ")); 390 ppp_print(ndo, p, length); 391 } 392 return (1); 393 394 case ETHERTYPE_MPCP: 395 mpcp_print(ndo, p, length); 396 return (1); 397 398 case ETHERTYPE_SLOW: 399 slow_print(ndo, p, length); 400 return (1); 401 402 case ETHERTYPE_CFM: 403 case ETHERTYPE_CFM_OLD: 404 cfm_print(ndo, p, length); 405 return (1); 406 407 case ETHERTYPE_LLDP: 408 lldp_print(ndo, p, length); 409 return (1); 410 411 case ETHERTYPE_LOOPBACK: 412 loopback_print(ndo, p, length); 413 return (1); 414 415 case ETHERTYPE_MPLS: 416 case ETHERTYPE_MPLS_MULTI: 417 mpls_print(ndo, p, length); 418 return (1); 419 420 case ETHERTYPE_TIPC: 421 tipc_print(ndo, p, length, caplen); 422 return (1); 423 424 case ETHERTYPE_MS_NLB_HB: 425 msnlb_print(ndo, p); 426 return (1); 427 428 case ETHERTYPE_GEONET_OLD: 429 case ETHERTYPE_GEONET: 430 geonet_print(ndo, p, length, src); 431 return (1); 432 433 case ETHERTYPE_CALM_FAST: 434 calm_fast_print(ndo, p, length, src); 435 return (1); 436 437 case ETHERTYPE_AOE: 438 aoe_print(ndo, p, length); 439 return (1); 440 441 case ETHERTYPE_MEDSA: 442 medsa_print(ndo, p, length, caplen, src, dst); 443 return (1); 444 445 case ETHERTYPE_LAT: 446 case ETHERTYPE_SCA: 447 case ETHERTYPE_MOPRC: 448 case ETHERTYPE_MOPDL: 449 case ETHERTYPE_IEEE1905_1: 450 /* default_print for now */ 451 default: 452 return (0); 453 } 454 } 455 456 457 /* 458 * Local Variables: 459 * c-style: whitesmith 460 * c-basic-offset: 8 461 * End: 462 */ 463 464
