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 * $FreeBSD$ 22 */ 23 24 #define NETDISSECT_REWORKED 25 #ifdef HAVE_CONFIG_H 26 #include "config.h" 27 #endif 28 29 #include <tcpdump-stdinc.h> 30 31 #include "interface.h" 32 #include "extract.h" 33 #include "addrtoname.h" 34 #include "ethertype.h" 35 #include "ether.h" 36 37 const struct tok ethertype_values[] = { 38 { ETHERTYPE_IP, "IPv4" }, 39 { ETHERTYPE_MPLS, "MPLS unicast" }, 40 { ETHERTYPE_MPLS_MULTI, "MPLS multicast" }, 41 { ETHERTYPE_IPV6, "IPv6" }, 42 { ETHERTYPE_8021Q, "802.1Q" }, 43 { ETHERTYPE_8021Q9100, "802.1Q-9100" }, 44 { ETHERTYPE_8021QinQ, "802.1Q-QinQ" }, 45 { ETHERTYPE_8021Q9200, "802.1Q-9200" }, 46 { ETHERTYPE_VMAN, "VMAN" }, 47 { ETHERTYPE_PUP, "PUP" }, 48 { ETHERTYPE_ARP, "ARP"}, 49 { ETHERTYPE_REVARP, "Reverse ARP"}, 50 { ETHERTYPE_NS, "NS" }, 51 { ETHERTYPE_SPRITE, "Sprite" }, 52 { ETHERTYPE_TRAIL, "Trail" }, 53 { ETHERTYPE_MOPDL, "MOP DL" }, 54 { ETHERTYPE_MOPRC, "MOP RC" }, 55 { ETHERTYPE_DN, "DN" }, 56 { ETHERTYPE_LAT, "LAT" }, 57 { ETHERTYPE_SCA, "SCA" }, 58 { ETHERTYPE_TEB, "TEB" }, 59 { ETHERTYPE_LANBRIDGE, "Lanbridge" }, 60 { ETHERTYPE_DECDNS, "DEC DNS" }, 61 { ETHERTYPE_DECDTS, "DEC DTS" }, 62 { ETHERTYPE_VEXP, "VEXP" }, 63 { ETHERTYPE_VPROD, "VPROD" }, 64 { ETHERTYPE_ATALK, "Appletalk" }, 65 { ETHERTYPE_AARP, "Appletalk ARP" }, 66 { ETHERTYPE_IPX, "IPX" }, 67 { ETHERTYPE_PPP, "PPP" }, 68 { ETHERTYPE_MPCP, "MPCP" }, 69 { ETHERTYPE_SLOW, "Slow Protocols" }, 70 { ETHERTYPE_PPPOED, "PPPoE D" }, 71 { ETHERTYPE_PPPOES, "PPPoE S" }, 72 { ETHERTYPE_EAPOL, "EAPOL" }, 73 { ETHERTYPE_RRCP, "RRCP" }, 74 { ETHERTYPE_MS_NLB_HB, "MS NLB heartbeat" }, 75 { ETHERTYPE_JUMBO, "Jumbo" }, 76 { ETHERTYPE_LOOPBACK, "Loopback" }, 77 { ETHERTYPE_ISO, "OSI" }, 78 { ETHERTYPE_GRE_ISO, "GRE-OSI" }, 79 { ETHERTYPE_CFM_OLD, "CFM (old)" }, 80 { ETHERTYPE_CFM, "CFM" }, 81 { ETHERTYPE_IEEE1905_1, "IEEE1905.1" }, 82 { ETHERTYPE_LLDP, "LLDP" }, 83 { ETHERTYPE_TIPC, "TIPC"}, 84 { ETHERTYPE_GEONET_OLD, "GeoNet (old)"}, 85 { ETHERTYPE_GEONET, "GeoNet"}, 86 { ETHERTYPE_CALM_FAST, "CALM FAST"}, 87 { ETHERTYPE_AOE, "AoE" }, 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 ether_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 ether_type = EXTRACT_16BITS(&ep->ether_type); 105 if (!ndo->ndo_qflag) { 106 if (ether_type <= ETHERMTU) 107 ND_PRINT((ndo, ", 802.3")); 108 else 109 ND_PRINT((ndo, ", ethertype %s (0x%04x)", 110 tok2str(ethertype_values,"Unknown", ether_type), 111 ether_type)); 112 } else { 113 if (ether_type <= ETHERMTU) 114 ND_PRINT((ndo, ", 802.3")); 115 else 116 ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type))); 117 } 118 119 ND_PRINT((ndo, ", length %u: ", length)); 120 } 121 122 /* 123 * Print an Ethernet frame. 124 * This might be encapsulated within another frame; we might be passed 125 * a pointer to a function that can print header information for that 126 * frame's protocol, and an argument to pass to that function. 127 */ 128 void 129 ether_print(netdissect_options *ndo, 130 const u_char *p, u_int length, u_int caplen, 131 void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg) 132 { 133 struct ether_header *ep; 134 u_int orig_length; 135 u_short ether_type; 136 u_short extracted_ether_type; 137 138 if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) { 139 ND_PRINT((ndo, "[|ether]")); 140 return; 141 } 142 143 if (ndo->ndo_eflag) { 144 if (print_encap_header != NULL) 145 (*print_encap_header)(ndo, encap_header_arg); 146 ether_hdr_print(ndo, p, length); 147 } 148 orig_length = length; 149 150 length -= ETHER_HDRLEN; 151 caplen -= ETHER_HDRLEN; 152 ep = (struct ether_header *)p; 153 p += ETHER_HDRLEN; 154 155 ether_type = EXTRACT_16BITS(&ep->ether_type); 156 157 recurse: 158 /* 159 * Is it (gag) an 802.3 encapsulation? 160 */ 161 if (ether_type <= ETHERMTU) { 162 /* Try to print the LLC-layer header & higher layers */ 163 if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep), 164 &extracted_ether_type) == 0) { 165 /* ether_type not known, print raw packet */ 166 if (!ndo->ndo_eflag) { 167 if (print_encap_header != NULL) 168 (*print_encap_header)(ndo, encap_header_arg); 169 ether_hdr_print(ndo, (u_char *)ep, orig_length); 170 } 171 172 if (!ndo->ndo_suppress_default_print) 173 ND_DEFAULTPRINT(p, caplen); 174 } 175 } else if (ether_type == ETHERTYPE_8021Q || 176 ether_type == ETHERTYPE_8021Q9100 || 177 ether_type == ETHERTYPE_8021Q9200 || 178 ether_type == ETHERTYPE_8021QinQ) { 179 /* 180 * Print VLAN information, and then go back and process 181 * the enclosed type field. 182 */ 183 if (caplen < 4 || length < 4) { 184 ND_PRINT((ndo, "[|vlan]")); 185 return; 186 } 187 if (ndo->ndo_eflag) { 188 uint16_t tag = EXTRACT_16BITS(p); 189 190 ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag))); 191 } 192 193 ether_type = EXTRACT_16BITS(p + 2); 194 if (ndo->ndo_eflag && ether_type > ETHERMTU) 195 ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", ether_type))); 196 p += 4; 197 length -= 4; 198 caplen -= 4; 199 goto recurse; 200 } else if (ether_type == ETHERTYPE_JUMBO) { 201 /* 202 * Alteon jumbo frames. 203 * See 204 * 205 * http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01 206 * 207 * which indicates that, following the type field, 208 * there's an LLC header and payload. 209 */ 210 /* Try to print the LLC-layer header & higher layers */ 211 if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep), 212 &extracted_ether_type) == 0) { 213 /* ether_type not known, print raw packet */ 214 if (!ndo->ndo_eflag) { 215 if (print_encap_header != NULL) 216 (*print_encap_header)(ndo, encap_header_arg); 217 ether_hdr_print(ndo, (u_char *)ep, orig_length); 218 } 219 220 if (!ndo->ndo_suppress_default_print) 221 ND_DEFAULTPRINT(p, caplen); 222 } 223 } else { 224 if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) { 225 /* ether_type not known, print raw packet */ 226 if (!ndo->ndo_eflag) { 227 if (print_encap_header != NULL) 228 (*print_encap_header)(ndo, encap_header_arg); 229 ether_hdr_print(ndo, (u_char *)ep, orig_length); 230 } 231 232 if (!ndo->ndo_suppress_default_print) 233 ND_DEFAULTPRINT(p, caplen); 234 } 235 } 236 } 237 238 /* 239 * This is the top level routine of the printer. 'p' points 240 * to the ether header of the packet, 'h->ts' is the timestamp, 241 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 242 * is the number of bytes actually captured. 243 */ 244 u_int 245 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 246 const u_char *p) 247 { 248 ether_print(ndo, p, h->len, h->caplen, NULL, NULL); 249 250 return (ETHER_HDRLEN); 251 } 252 253 /* 254 * This is the top level routine of the printer. 'p' points 255 * to the ether header of the packet, 'h->ts' is the timestamp, 256 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 257 * is the number of bytes actually captured. 258 * 259 * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header 260 * before the Ethernet header. 261 */ 262 u_int 263 netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 264 const u_char *p) 265 { 266 /* 267 * Fail if we don't have enough data for the Hilscher pseudo-header. 268 */ 269 if (h->len < 4 || h->caplen < 4) { 270 ND_PRINT((ndo, "[|netanalyzer]")); 271 return (h->caplen); 272 } 273 274 /* Skip the pseudo-header. */ 275 ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL); 276 277 return (4 + ETHER_HDRLEN); 278 } 279 280 /* 281 * This is the top level routine of the printer. 'p' points 282 * to the ether header of the packet, 'h->ts' is the timestamp, 283 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 284 * is the number of bytes actually captured. 285 * 286 * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte 287 * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF 288 * before the Ethernet header. 289 */ 290 u_int 291 netanalyzer_transparent_if_print(netdissect_options *ndo, 292 const struct pcap_pkthdr *h, 293 const u_char *p) 294 { 295 /* 296 * Fail if we don't have enough data for the Hilscher pseudo-header, 297 * preamble, and SOF. 298 */ 299 if (h->len < 12 || h->caplen < 12) { 300 ND_PRINT((ndo, "[|netanalyzer-transparent]")); 301 return (h->caplen); 302 } 303 304 /* Skip the pseudo-header, preamble, and SOF. */ 305 ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL); 306 307 return (12 + ETHER_HDRLEN); 308 } 309 310 /* 311 * Prints the packet payload, given an Ethernet type code for the payload's 312 * protocol. 313 * 314 * Returns non-zero if it can do so, zero if the ethertype is unknown. 315 */ 316 317 int 318 ethertype_print(netdissect_options *ndo, 319 u_short ether_type, const u_char *p, 320 u_int length, u_int caplen) 321 { 322 switch (ether_type) { 323 324 case ETHERTYPE_IP: 325 ip_print(ndo, p, length); 326 return (1); 327 328 case ETHERTYPE_IPV6: 329 ip6_print(ndo, p, length); 330 return (1); 331 332 case ETHERTYPE_ARP: 333 case ETHERTYPE_REVARP: 334 arp_print(ndo, p, length, caplen); 335 return (1); 336 337 case ETHERTYPE_DN: 338 decnet_print(ndo, p, length, caplen); 339 return (1); 340 341 case ETHERTYPE_ATALK: 342 if (ndo->ndo_vflag) 343 ND_PRINT((ndo, "et1 ")); 344 atalk_print(ndo, p, length); 345 return (1); 346 347 case ETHERTYPE_AARP: 348 aarp_print(ndo, p, length); 349 return (1); 350 351 case ETHERTYPE_IPX: 352 ND_PRINT((ndo, "(NOV-ETHII) ")); 353 ipx_print(ndo, p, length); 354 return (1); 355 356 case ETHERTYPE_ISO: 357 isoclns_print(ndo, p + 1, length - 1, length - 1); 358 return(1); 359 360 case ETHERTYPE_PPPOED: 361 case ETHERTYPE_PPPOES: 362 case ETHERTYPE_PPPOED2: 363 case ETHERTYPE_PPPOES2: 364 pppoe_print(ndo, p, length); 365 return (1); 366 367 case ETHERTYPE_EAPOL: 368 eap_print(ndo, p, length); 369 return (1); 370 371 case ETHERTYPE_RRCP: 372 rrcp_print(ndo, p - 14 , length + 14); 373 return (1); 374 375 case ETHERTYPE_PPP: 376 if (length) { 377 ND_PRINT((ndo, ": ")); 378 ppp_print(ndo, p, length); 379 } 380 return (1); 381 382 case ETHERTYPE_MPCP: 383 mpcp_print(ndo, p, length); 384 return (1); 385 386 case ETHERTYPE_SLOW: 387 slow_print(ndo, p, length); 388 return (1); 389 390 case ETHERTYPE_CFM: 391 case ETHERTYPE_CFM_OLD: 392 cfm_print(ndo, p, length); 393 return (1); 394 395 case ETHERTYPE_LLDP: 396 lldp_print(ndo, p, length); 397 return (1); 398 399 case ETHERTYPE_LOOPBACK: 400 loopback_print(ndo, p, length); 401 return (1); 402 403 case ETHERTYPE_MPLS: 404 case ETHERTYPE_MPLS_MULTI: 405 mpls_print(ndo, p, length); 406 return (1); 407 408 case ETHERTYPE_TIPC: 409 tipc_print(ndo, p, length, caplen); 410 return (1); 411 412 case ETHERTYPE_MS_NLB_HB: 413 msnlb_print(ndo, p); 414 return (1); 415 416 case ETHERTYPE_GEONET_OLD: 417 case ETHERTYPE_GEONET: 418 geonet_print(ndo, p-14, p, length); 419 return (1); 420 421 case ETHERTYPE_CALM_FAST: 422 calm_fast_print(ndo, p-14, p, length); 423 return (1); 424 425 case ETHERTYPE_AOE: 426 aoe_print(ndo, p, length); 427 return (1); 428 429 case ETHERTYPE_LAT: 430 case ETHERTYPE_SCA: 431 case ETHERTYPE_MOPRC: 432 case ETHERTYPE_MOPDL: 433 case ETHERTYPE_IEEE1905_1: 434 /* default_print for now */ 435 default: 436 return (0); 437 } 438 } 439 440 441 /* 442 * Local Variables: 443 * c-style: whitesmith 444 * c-basic-offset: 8 445 * End: 446 */ 447 448