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 #define NETDISSECT_REWORKED 23 #ifdef HAVE_CONFIG_H 24 #include "config.h" 25 #endif 26 27 #include <tcpdump-stdinc.h> 28 29 #include "interface.h" 30 #include "extract.h" 31 #include "addrtoname.h" 32 #include "ethertype.h" 33 #include "ether.h" 34 35 const struct tok ethertype_values[] = { 36 { ETHERTYPE_IP, "IPv4" }, 37 { ETHERTYPE_MPLS, "MPLS unicast" }, 38 { ETHERTYPE_MPLS_MULTI, "MPLS multicast" }, 39 { ETHERTYPE_IPV6, "IPv6" }, 40 { ETHERTYPE_8021Q, "802.1Q" }, 41 { ETHERTYPE_8021Q9100, "802.1Q-9100" }, 42 { ETHERTYPE_8021QinQ, "802.1Q-QinQ" }, 43 { ETHERTYPE_8021Q9200, "802.1Q-9200" }, 44 { ETHERTYPE_VMAN, "VMAN" }, 45 { ETHERTYPE_PUP, "PUP" }, 46 { ETHERTYPE_ARP, "ARP"}, 47 { ETHERTYPE_REVARP, "Reverse ARP"}, 48 { ETHERTYPE_NS, "NS" }, 49 { ETHERTYPE_SPRITE, "Sprite" }, 50 { ETHERTYPE_TRAIL, "Trail" }, 51 { ETHERTYPE_MOPDL, "MOP DL" }, 52 { ETHERTYPE_MOPRC, "MOP RC" }, 53 { ETHERTYPE_DN, "DN" }, 54 { ETHERTYPE_LAT, "LAT" }, 55 { ETHERTYPE_SCA, "SCA" }, 56 { ETHERTYPE_TEB, "TEB" }, 57 { ETHERTYPE_LANBRIDGE, "Lanbridge" }, 58 { ETHERTYPE_DECDNS, "DEC DNS" }, 59 { ETHERTYPE_DECDTS, "DEC DTS" }, 60 { ETHERTYPE_VEXP, "VEXP" }, 61 { ETHERTYPE_VPROD, "VPROD" }, 62 { ETHERTYPE_ATALK, "Appletalk" }, 63 { ETHERTYPE_AARP, "Appletalk ARP" }, 64 { ETHERTYPE_IPX, "IPX" }, 65 { ETHERTYPE_PPP, "PPP" }, 66 { ETHERTYPE_MPCP, "MPCP" }, 67 { ETHERTYPE_SLOW, "Slow Protocols" }, 68 { ETHERTYPE_PPPOED, "PPPoE D" }, 69 { ETHERTYPE_PPPOES, "PPPoE S" }, 70 { ETHERTYPE_EAPOL, "EAPOL" }, 71 { ETHERTYPE_RRCP, "RRCP" }, 72 { ETHERTYPE_MS_NLB_HB, "MS NLB heartbeat" }, 73 { ETHERTYPE_JUMBO, "Jumbo" }, 74 { ETHERTYPE_LOOPBACK, "Loopback" }, 75 { ETHERTYPE_ISO, "OSI" }, 76 { ETHERTYPE_GRE_ISO, "GRE-OSI" }, 77 { ETHERTYPE_CFM_OLD, "CFM (old)" }, 78 { ETHERTYPE_CFM, "CFM" }, 79 { ETHERTYPE_IEEE1905_1, "IEEE1905.1" }, 80 { ETHERTYPE_LLDP, "LLDP" }, 81 { ETHERTYPE_TIPC, "TIPC"}, 82 { ETHERTYPE_GEONET_OLD, "GeoNet (old)"}, 83 { ETHERTYPE_GEONET, "GeoNet"}, 84 { ETHERTYPE_CALM_FAST, "CALM FAST"}, 85 { ETHERTYPE_AOE, "AoE" }, 86 { 0, NULL} 87 }; 88 89 static inline void 90 ether_hdr_print(netdissect_options *ndo, 91 const u_char *bp, u_int length) 92 { 93 register const struct ether_header *ep; 94 uint16_t ether_type; 95 96 ep = (const struct ether_header *)bp; 97 98 ND_PRINT((ndo, "%s > %s", 99 etheraddr_string(ndo, ESRC(ep)), 100 etheraddr_string(ndo, EDST(ep)))); 101 102 ether_type = EXTRACT_16BITS(&ep->ether_type); 103 if (!ndo->ndo_qflag) { 104 if (ether_type <= ETHERMTU) 105 ND_PRINT((ndo, ", 802.3")); 106 else 107 ND_PRINT((ndo, ", ethertype %s (0x%04x)", 108 tok2str(ethertype_values,"Unknown", ether_type), 109 ether_type)); 110 } else { 111 if (ether_type <= ETHERMTU) 112 ND_PRINT((ndo, ", 802.3")); 113 else 114 ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type))); 115 } 116 117 ND_PRINT((ndo, ", length %u: ", length)); 118 } 119 120 /* 121 * Print an Ethernet frame. 122 * This might be encapsulated within another frame; we might be passed 123 * a pointer to a function that can print header information for that 124 * frame's protocol, and an argument to pass to that function. 125 */ 126 void 127 ether_print(netdissect_options *ndo, 128 const u_char *p, u_int length, u_int caplen, 129 void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg) 130 { 131 struct ether_header *ep; 132 u_int orig_length; 133 u_short ether_type; 134 u_short extracted_ether_type; 135 136 if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) { 137 ND_PRINT((ndo, "[|ether]")); 138 return; 139 } 140 141 if (ndo->ndo_eflag) { 142 if (print_encap_header != NULL) 143 (*print_encap_header)(ndo, encap_header_arg); 144 ether_hdr_print(ndo, p, length); 145 } 146 orig_length = length; 147 148 length -= ETHER_HDRLEN; 149 caplen -= ETHER_HDRLEN; 150 ep = (struct ether_header *)p; 151 p += ETHER_HDRLEN; 152 153 ether_type = EXTRACT_16BITS(&ep->ether_type); 154 155 recurse: 156 /* 157 * Is it (gag) an 802.3 encapsulation? 158 */ 159 if (ether_type <= ETHERMTU) { 160 /* Try to print the LLC-layer header & higher layers */ 161 if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep), 162 &extracted_ether_type) == 0) { 163 /* ether_type not known, print raw packet */ 164 if (!ndo->ndo_eflag) { 165 if (print_encap_header != NULL) 166 (*print_encap_header)(ndo, encap_header_arg); 167 ether_hdr_print(ndo, (u_char *)ep, orig_length); 168 } 169 170 if (!ndo->ndo_suppress_default_print) 171 ND_DEFAULTPRINT(p, caplen); 172 } 173 } else if (ether_type == ETHERTYPE_8021Q || 174 ether_type == ETHERTYPE_8021Q9100 || 175 ether_type == ETHERTYPE_8021Q9200 || 176 ether_type == ETHERTYPE_8021QinQ) { 177 /* 178 * Print VLAN information, and then go back and process 179 * the enclosed type field. 180 */ 181 if (caplen < 4 || length < 4) { 182 ND_PRINT((ndo, "[|vlan]")); 183 return; 184 } 185 if (ndo->ndo_eflag) { 186 uint16_t tag = EXTRACT_16BITS(p); 187 188 ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag))); 189 } 190 191 ether_type = EXTRACT_16BITS(p + 2); 192 if (ndo->ndo_eflag && ether_type > ETHERMTU) 193 ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", ether_type))); 194 p += 4; 195 length -= 4; 196 caplen -= 4; 197 goto recurse; 198 } else if (ether_type == ETHERTYPE_JUMBO) { 199 /* 200 * Alteon jumbo frames. 201 * See 202 * 203 * http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01 204 * 205 * which indicates that, following the type field, 206 * there's an LLC header and payload. 207 */ 208 /* Try to print the LLC-layer header & higher layers */ 209 if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep), 210 &extracted_ether_type) == 0) { 211 /* ether_type not known, print raw packet */ 212 if (!ndo->ndo_eflag) { 213 if (print_encap_header != NULL) 214 (*print_encap_header)(ndo, encap_header_arg); 215 ether_hdr_print(ndo, (u_char *)ep, orig_length); 216 } 217 218 if (!ndo->ndo_suppress_default_print) 219 ND_DEFAULTPRINT(p, caplen); 220 } 221 } else { 222 if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) { 223 /* ether_type not known, print raw packet */ 224 if (!ndo->ndo_eflag) { 225 if (print_encap_header != NULL) 226 (*print_encap_header)(ndo, encap_header_arg); 227 ether_hdr_print(ndo, (u_char *)ep, orig_length); 228 } 229 230 if (!ndo->ndo_suppress_default_print) 231 ND_DEFAULTPRINT(p, caplen); 232 } 233 } 234 } 235 236 /* 237 * This is the top level routine of the printer. 'p' points 238 * to the ether header of the packet, 'h->ts' is the timestamp, 239 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 240 * is the number of bytes actually captured. 241 */ 242 u_int 243 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 244 const u_char *p) 245 { 246 ether_print(ndo, p, h->len, h->caplen, NULL, NULL); 247 248 return (ETHER_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->ts' is the timestamp, 254 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 255 * is the number of bytes actually captured. 256 * 257 * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header 258 * before the Ethernet header. 259 */ 260 u_int 261 netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 262 const u_char *p) 263 { 264 /* 265 * Fail if we don't have enough data for the Hilscher pseudo-header. 266 */ 267 if (h->len < 4 || h->caplen < 4) { 268 ND_PRINT((ndo, "[|netanalyzer]")); 269 return (h->caplen); 270 } 271 272 /* Skip the pseudo-header. */ 273 ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL); 274 275 return (4 + ETHER_HDRLEN); 276 } 277 278 /* 279 * This is the top level routine of the printer. 'p' points 280 * to the ether header of the packet, 'h->ts' is the timestamp, 281 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 282 * is the number of bytes actually captured. 283 * 284 * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte 285 * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF 286 * before the Ethernet header. 287 */ 288 u_int 289 netanalyzer_transparent_if_print(netdissect_options *ndo, 290 const struct pcap_pkthdr *h, 291 const u_char *p) 292 { 293 /* 294 * Fail if we don't have enough data for the Hilscher pseudo-header, 295 * preamble, and SOF. 296 */ 297 if (h->len < 12 || h->caplen < 12) { 298 ND_PRINT((ndo, "[|netanalyzer-transparent]")); 299 return (h->caplen); 300 } 301 302 /* Skip the pseudo-header, preamble, and SOF. */ 303 ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL); 304 305 return (12 + ETHER_HDRLEN); 306 } 307 308 /* 309 * Prints the packet payload, given an Ethernet type code for the payload's 310 * protocol. 311 * 312 * Returns non-zero if it can do so, zero if the ethertype is unknown. 313 */ 314 315 int 316 ethertype_print(netdissect_options *ndo, 317 u_short ether_type, const u_char *p, 318 u_int length, u_int caplen) 319 { 320 switch (ether_type) { 321 322 case ETHERTYPE_IP: 323 ip_print(ndo, p, length); 324 return (1); 325 326 case ETHERTYPE_IPV6: 327 ip6_print(ndo, p, length); 328 return (1); 329 330 case ETHERTYPE_ARP: 331 case ETHERTYPE_REVARP: 332 arp_print(ndo, p, length, caplen); 333 return (1); 334 335 case ETHERTYPE_DN: 336 decnet_print(ndo, p, length, caplen); 337 return (1); 338 339 case ETHERTYPE_ATALK: 340 if (ndo->ndo_vflag) 341 ND_PRINT((ndo, "et1 ")); 342 atalk_print(ndo, p, length); 343 return (1); 344 345 case ETHERTYPE_AARP: 346 aarp_print(ndo, p, length); 347 return (1); 348 349 case ETHERTYPE_IPX: 350 ND_PRINT((ndo, "(NOV-ETHII) ")); 351 ipx_print(ndo, p, length); 352 return (1); 353 354 case ETHERTYPE_ISO: 355 isoclns_print(ndo, p + 1, length - 1, length - 1); 356 return(1); 357 358 case ETHERTYPE_PPPOED: 359 case ETHERTYPE_PPPOES: 360 case ETHERTYPE_PPPOED2: 361 case ETHERTYPE_PPPOES2: 362 pppoe_print(ndo, p, length); 363 return (1); 364 365 case ETHERTYPE_EAPOL: 366 eap_print(ndo, p, length); 367 return (1); 368 369 case ETHERTYPE_RRCP: 370 rrcp_print(ndo, p - 14 , length + 14); 371 return (1); 372 373 case ETHERTYPE_PPP: 374 if (length) { 375 ND_PRINT((ndo, ": ")); 376 ppp_print(ndo, p, length); 377 } 378 return (1); 379 380 case ETHERTYPE_MPCP: 381 mpcp_print(ndo, p, length); 382 return (1); 383 384 case ETHERTYPE_SLOW: 385 slow_print(ndo, p, length); 386 return (1); 387 388 case ETHERTYPE_CFM: 389 case ETHERTYPE_CFM_OLD: 390 cfm_print(ndo, p, length); 391 return (1); 392 393 case ETHERTYPE_LLDP: 394 lldp_print(ndo, p, length); 395 return (1); 396 397 case ETHERTYPE_LOOPBACK: 398 loopback_print(ndo, p, length); 399 return (1); 400 401 case ETHERTYPE_MPLS: 402 case ETHERTYPE_MPLS_MULTI: 403 mpls_print(ndo, p, length); 404 return (1); 405 406 case ETHERTYPE_TIPC: 407 tipc_print(ndo, p, length, caplen); 408 return (1); 409 410 case ETHERTYPE_MS_NLB_HB: 411 msnlb_print(ndo, p); 412 return (1); 413 414 case ETHERTYPE_GEONET_OLD: 415 case ETHERTYPE_GEONET: 416 geonet_print(ndo, p-14, p, length); 417 return (1); 418 419 case ETHERTYPE_CALM_FAST: 420 calm_fast_print(ndo, p-14, p, length); 421 return (1); 422 423 case ETHERTYPE_AOE: 424 aoe_print(ndo, p, length); 425 return (1); 426 427 case ETHERTYPE_LAT: 428 case ETHERTYPE_SCA: 429 case ETHERTYPE_MOPRC: 430 case ETHERTYPE_MOPDL: 431 case ETHERTYPE_IEEE1905_1: 432 /* default_print for now */ 433 default: 434 return (0); 435 } 436 } 437 438 439 /* 440 * Local Variables: 441 * c-style: whitesmith 442 * c-basic-offset: 8 443 * End: 444 */ 445 446
