117680Spst/* 298527Sfenner * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 317680Spst * The Regents of the University of California. All rights reserved. 417680Spst * 517680Spst * Redistribution and use in source and binary forms, with or without 617680Spst * modification, are permitted provided that: (1) source code distributions 717680Spst * retain the above copyright notice and this paragraph in its entirety, (2) 817680Spst * distributions including binary code include the above copyright notice and 917680Spst * this paragraph in its entirety in the documentation or other materials 1017680Spst * provided with the distribution, and (3) all advertising materials mentioning 1117680Spst * features or use of this software display the following acknowledgement: 1217680Spst * ``This product includes software developed by the University of California, 1317680Spst * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 1417680Spst * the University nor the names of its contributors may be used to endorse 1517680Spst * or promote products derived from this software without specific prior 1617680Spst * written permission. 1717680Spst * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 1817680Spst * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 1917680Spst * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 2053146Sbrian * 2153146Sbrian * $FreeBSD$ 2217680Spst */ 2317680Spst#ifndef lint 24127675Sbmsstatic const char rcsid[] _U_ = 25214478Srpaulo "@(#) $Header: /tcpdump/master/tcpdump/print-ether.c,v 1.106 2008-02-06 10:47:53 guy Exp $ (LBL)"; 2617680Spst#endif 2717680Spst 28235530Sdelphij#define NETDISSECT_REWORKED 2956896Sfenner#ifdef HAVE_CONFIG_H 3056896Sfenner#include "config.h" 3156896Sfenner#endif 3256896Sfenner 33127675Sbms#include <tcpdump-stdinc.h> 3417680Spst 3517680Spst#include <stdio.h> 3617680Spst#include <pcap.h> 3717680Spst 3817680Spst#include "interface.h" 39214478Srpaulo#include "extract.h" 4017680Spst#include "addrtoname.h" 4117680Spst#include "ethertype.h" 4275118Sfenner#include "ether.h" 4375118Sfenner 44127675Sbmsconst struct tok ethertype_values[] = { 45127675Sbms { ETHERTYPE_IP, "IPv4" }, 46127675Sbms { ETHERTYPE_MPLS, "MPLS unicast" }, 47127675Sbms { ETHERTYPE_MPLS_MULTI, "MPLS multicast" }, 48127675Sbms { ETHERTYPE_IPV6, "IPv6" }, 49127675Sbms { ETHERTYPE_8021Q, "802.1Q" }, 50235530Sdelphij { ETHERTYPE_8021Q9100, "802.1Q-9100" }, 51235530Sdelphij { ETHERTYPE_8021QinQ, "802.1Q-QinQ" }, 52235530Sdelphij { ETHERTYPE_8021Q9200, "802.1Q-9200" }, 53127675Sbms { ETHERTYPE_VMAN, "VMAN" }, 54127675Sbms { ETHERTYPE_PUP, "PUP" }, 55127675Sbms { ETHERTYPE_ARP, "ARP"}, 56172686Smlaier { ETHERTYPE_REVARP, "Reverse ARP"}, 57127675Sbms { ETHERTYPE_NS, "NS" }, 58127675Sbms { ETHERTYPE_SPRITE, "Sprite" }, 59127675Sbms { ETHERTYPE_TRAIL, "Trail" }, 60127675Sbms { ETHERTYPE_MOPDL, "MOP DL" }, 61127675Sbms { ETHERTYPE_MOPRC, "MOP RC" }, 62127675Sbms { ETHERTYPE_DN, "DN" }, 63127675Sbms { ETHERTYPE_LAT, "LAT" }, 64127675Sbms { ETHERTYPE_SCA, "SCA" }, 65214478Srpaulo { ETHERTYPE_TEB, "TEB" }, 66127675Sbms { ETHERTYPE_LANBRIDGE, "Lanbridge" }, 67127675Sbms { ETHERTYPE_DECDNS, "DEC DNS" }, 68127675Sbms { ETHERTYPE_DECDTS, "DEC DTS" }, 69127675Sbms { ETHERTYPE_VEXP, "VEXP" }, 70127675Sbms { ETHERTYPE_VPROD, "VPROD" }, 71127675Sbms { ETHERTYPE_ATALK, "Appletalk" }, 72127675Sbms { ETHERTYPE_AARP, "Appletalk ARP" }, 73127675Sbms { ETHERTYPE_IPX, "IPX" }, 74127675Sbms { ETHERTYPE_PPP, "PPP" }, 75190207Srpaulo { ETHERTYPE_MPCP, "MPCP" }, 76162021Ssam { ETHERTYPE_SLOW, "Slow Protocols" }, 77127675Sbms { ETHERTYPE_PPPOED, "PPPoE D" }, 78127675Sbms { ETHERTYPE_PPPOES, "PPPoE S" }, 79146778Ssam { ETHERTYPE_EAPOL, "EAPOL" }, 80190207Srpaulo { ETHERTYPE_RRCP, "RRCP" }, 81251158Sdelphij { ETHERTYPE_MS_NLB_HB, "MS NLB heartbeat" }, 82146778Ssam { ETHERTYPE_JUMBO, "Jumbo" }, 83127675Sbms { ETHERTYPE_LOOPBACK, "Loopback" }, 84146778Ssam { ETHERTYPE_ISO, "OSI" }, 85146778Ssam { ETHERTYPE_GRE_ISO, "GRE-OSI" }, 86190207Srpaulo { ETHERTYPE_CFM_OLD, "CFM (old)" }, 87190207Srpaulo { ETHERTYPE_CFM, "CFM" }, 88190207Srpaulo { ETHERTYPE_LLDP, "LLDP" }, 89241235Sdelphij { ETHERTYPE_TIPC, "TIPC"}, 90127675Sbms { 0, NULL} 91127675Sbms}; 92127675Sbms 9317680Spststatic inline void 94235530Sdelphijether_hdr_print(netdissect_options *ndo, 95235530Sdelphij const u_char *bp, u_int length) 9617680Spst{ 9717680Spst register const struct ether_header *ep; 98214478Srpaulo u_int16_t ether_type; 99214478Srpaulo 100127675Sbms ep = (const struct ether_header *)bp; 10117680Spst 102235530Sdelphij (void)ND_PRINT((ndo, "%s > %s", 103127675Sbms etheraddr_string(ESRC(ep)), 104235530Sdelphij etheraddr_string(EDST(ep)))); 105127675Sbms 106214478Srpaulo ether_type = EXTRACT_16BITS(&ep->ether_type); 107235530Sdelphij if (!ndo->ndo_qflag) { 108214478Srpaulo if (ether_type <= ETHERMTU) 109235530Sdelphij (void)ND_PRINT((ndo, ", 802.3")); 110127675Sbms else 111235530Sdelphij (void)ND_PRINT((ndo, ", ethertype %s (0x%04x)", 112214478Srpaulo tok2str(ethertype_values,"Unknown", ether_type), 113235530Sdelphij ether_type)); 114127675Sbms } else { 115214478Srpaulo if (ether_type <= ETHERMTU) 116235530Sdelphij (void)ND_PRINT((ndo, ", 802.3")); 117127675Sbms else 118235530Sdelphij (void)ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type))); 119127675Sbms } 120127675Sbms 121235530Sdelphij (void)ND_PRINT((ndo, ", length %u: ", length)); 12217680Spst} 12317680Spst 124214478Srpaulo/* 125214478Srpaulo * Print an Ethernet frame. 126214478Srpaulo * This might be encapsulated within another frame; we might be passed 127214478Srpaulo * a pointer to a function that can print header information for that 128214478Srpaulo * frame's protocol, and an argument to pass to that function. 129214478Srpaulo */ 13017680Spstvoid 131235530Sdelphijether_print(netdissect_options *ndo, 132235530Sdelphij const u_char *p, u_int length, u_int caplen, 133235530Sdelphij void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg) 13417680Spst{ 13517680Spst struct ether_header *ep; 136214478Srpaulo u_int orig_length; 13717680Spst u_short ether_type; 138127675Sbms u_short extracted_ether_type; 13917680Spst 140214478Srpaulo if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) { 141235530Sdelphij ND_PRINT((ndo, "[|ether]")); 142127675Sbms return; 14317680Spst } 14417680Spst 145235530Sdelphij if (ndo->ndo_eflag) { 146214478Srpaulo if (print_encap_header != NULL) 147235530Sdelphij (*print_encap_header)(ndo, encap_header_arg); 148235530Sdelphij ether_hdr_print(ndo, p, length); 149214478Srpaulo } 150214478Srpaulo orig_length = length; 15117680Spst 15275118Sfenner length -= ETHER_HDRLEN; 15375118Sfenner caplen -= ETHER_HDRLEN; 15417680Spst ep = (struct ether_header *)p; 15575118Sfenner p += ETHER_HDRLEN; 15617680Spst 157214478Srpaulo ether_type = EXTRACT_16BITS(&ep->ether_type); 15817680Spst 159214478Srpaulorecurse: 16017680Spst /* 16117680Spst * Is it (gag) an 802.3 encapsulation? 16217680Spst */ 16317689Spst if (ether_type <= ETHERMTU) { 16417680Spst /* Try to print the LLC-layer header & higher layers */ 16575118Sfenner if (llc_print(p, length, caplen, ESRC(ep), EDST(ep), 166127675Sbms &extracted_ether_type) == 0) { 16717680Spst /* ether_type not known, print raw packet */ 168235530Sdelphij if (!ndo->ndo_eflag) { 169214478Srpaulo if (print_encap_header != NULL) 170235530Sdelphij (*print_encap_header)(ndo, encap_header_arg); 171235530Sdelphij ether_hdr_print(ndo, (u_char *)ep, orig_length); 172214478Srpaulo } 173127675Sbms 174235530Sdelphij if (!ndo->ndo_suppress_default_print) 175235530Sdelphij ndo->ndo_default_print(ndo, p, caplen); 17617680Spst } 177235530Sdelphij } else if (ether_type == ETHERTYPE_8021Q || 178235530Sdelphij ether_type == ETHERTYPE_8021Q9100 || 179235530Sdelphij ether_type == ETHERTYPE_8021Q9200 || 180235530Sdelphij ether_type == ETHERTYPE_8021QinQ) { 181214478Srpaulo /* 182214478Srpaulo * Print VLAN information, and then go back and process 183214478Srpaulo * the enclosed type field. 184214478Srpaulo */ 185214478Srpaulo if (caplen < 4 || length < 4) { 186235530Sdelphij ND_PRINT((ndo, "[|vlan]")); 187214478Srpaulo return; 188214478Srpaulo } 189235530Sdelphij if (ndo->ndo_eflag) { 190214478Srpaulo u_int16_t tag = EXTRACT_16BITS(p); 191127675Sbms 192235530Sdelphij ND_PRINT((ndo, "vlan %u, p %u%s, ", 193214478Srpaulo tag & 0xfff, 194214478Srpaulo tag >> 13, 195235530Sdelphij (tag & 0x1000) ? ", CFI" : "")); 196214478Srpaulo } 197214478Srpaulo 198214478Srpaulo ether_type = EXTRACT_16BITS(p + 2); 199235530Sdelphij if (ndo->ndo_eflag && ether_type > ETHERMTU) 200235530Sdelphij ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", ether_type))); 201214478Srpaulo p += 4; 202214478Srpaulo length -= 4; 203214478Srpaulo caplen -= 4; 204214478Srpaulo goto recurse; 205214478Srpaulo } else if (ether_type == ETHERTYPE_JUMBO) { 206214478Srpaulo /* 207214478Srpaulo * Alteon jumbo frames. 208214478Srpaulo * See 209214478Srpaulo * 210214478Srpaulo * http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01 211214478Srpaulo * 212214478Srpaulo * which indicates that, following the type field, 213214478Srpaulo * there's an LLC header and payload. 214214478Srpaulo */ 215214478Srpaulo /* Try to print the LLC-layer header & higher layers */ 216214478Srpaulo if (llc_print(p, length, caplen, ESRC(ep), EDST(ep), 217214478Srpaulo &extracted_ether_type) == 0) { 218214478Srpaulo /* ether_type not known, print raw packet */ 219235530Sdelphij if (!ndo->ndo_eflag) { 220214478Srpaulo if (print_encap_header != NULL) 221235530Sdelphij (*print_encap_header)(ndo, encap_header_arg); 222235530Sdelphij ether_hdr_print(ndo, (u_char *)ep, orig_length); 223214478Srpaulo } 224214478Srpaulo 225235530Sdelphij if (!ndo->ndo_suppress_default_print) 226235530Sdelphij ndo->ndo_default_print(ndo, p, caplen); 227214478Srpaulo } 228214478Srpaulo } else { 229235530Sdelphij if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) { 230214478Srpaulo /* ether_type not known, print raw packet */ 231235530Sdelphij if (!ndo->ndo_eflag) { 232214478Srpaulo if (print_encap_header != NULL) 233235530Sdelphij (*print_encap_header)(ndo, encap_header_arg); 234235530Sdelphij ether_hdr_print(ndo, (u_char *)ep, orig_length); 235214478Srpaulo } 236214478Srpaulo 237235530Sdelphij if (!ndo->ndo_suppress_default_print) 238235530Sdelphij ndo->ndo_default_print(ndo, p, caplen); 239214478Srpaulo } 240214478Srpaulo } 24117680Spst} 24217680Spst 24317680Spst/* 244127675Sbms * This is the top level routine of the printer. 'p' points 245127675Sbms * to the ether header of the packet, 'h->ts' is the timestamp, 246146778Ssam * 'h->len' is the length of the packet off the wire, and 'h->caplen' 247127675Sbms * is the number of bytes actually captured. 248127675Sbms */ 249127675Sbmsu_int 250235530Sdelphijether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 251235530Sdelphij const u_char *p) 252127675Sbms{ 253235530Sdelphij ether_print(ndo, p, h->len, h->caplen, NULL, NULL); 254127675Sbms 255127675Sbms return (ETHER_HDRLEN); 256127675Sbms} 257127675Sbms 258127675Sbms/* 259235530Sdelphij * This is the top level routine of the printer. 'p' points 260235530Sdelphij * to the ether header of the packet, 'h->ts' is the timestamp, 261235530Sdelphij * 'h->len' is the length of the packet off the wire, and 'h->caplen' 262235530Sdelphij * is the number of bytes actually captured. 263235530Sdelphij * 264235530Sdelphij * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header 265235530Sdelphij * before the Ethernet header. 266235530Sdelphij */ 267235530Sdelphiju_int 268235530Sdelphijnetanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, 269235530Sdelphij const u_char *p) 270235530Sdelphij{ 271235530Sdelphij /* 272235530Sdelphij * Fail if we don't have enough data for the Hilscher pseudo-header. 273235530Sdelphij */ 274235530Sdelphij if (h->len < 4 || h->caplen < 4) { 275235530Sdelphij printf("[|netanalyzer]"); 276235530Sdelphij return (h->caplen); 277235530Sdelphij } 278235530Sdelphij 279235530Sdelphij /* Skip the pseudo-header. */ 280235530Sdelphij ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL); 281235530Sdelphij 282235530Sdelphij return (4 + ETHER_HDRLEN); 283235530Sdelphij} 284235530Sdelphij 285235530Sdelphij/* 286235530Sdelphij * This is the top level routine of the printer. 'p' points 287235530Sdelphij * to the ether header of the packet, 'h->ts' is the timestamp, 288235530Sdelphij * 'h->len' is the length of the packet off the wire, and 'h->caplen' 289235530Sdelphij * is the number of bytes actually captured. 290235530Sdelphij * 291235530Sdelphij * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte 292235530Sdelphij * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF 293235530Sdelphij * before the Ethernet header. 294235530Sdelphij */ 295235530Sdelphiju_int 296235530Sdelphijnetanalyzer_transparent_if_print(netdissect_options *ndo, 297235530Sdelphij const struct pcap_pkthdr *h, 298235530Sdelphij const u_char *p) 299235530Sdelphij{ 300235530Sdelphij /* 301235530Sdelphij * Fail if we don't have enough data for the Hilscher pseudo-header, 302235530Sdelphij * preamble, and SOF. 303235530Sdelphij */ 304235530Sdelphij if (h->len < 12 || h->caplen < 12) { 305235530Sdelphij printf("[|netanalyzer-transparent]"); 306235530Sdelphij return (h->caplen); 307235530Sdelphij } 308235530Sdelphij 309235530Sdelphij /* Skip the pseudo-header, preamble, and SOF. */ 310235530Sdelphij ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL); 311235530Sdelphij 312235530Sdelphij return (12 + ETHER_HDRLEN); 313235530Sdelphij} 314235530Sdelphij 315235530Sdelphij/* 316214478Srpaulo * Prints the packet payload, given an Ethernet type code for the payload's 317214478Srpaulo * protocol. 31817680Spst * 31917680Spst * Returns non-zero if it can do so, zero if the ethertype is unknown. 32017680Spst */ 32117680Spst 32217680Spstint 323235530Sdelphijethertype_print(netdissect_options *ndo, 324235530Sdelphij u_short ether_type, const u_char *p, 325235530Sdelphij u_int length, u_int caplen) 32617680Spst{ 327127675Sbms switch (ether_type) { 32817680Spst 32917680Spst case ETHERTYPE_IP: 330235530Sdelphij ip_print(ndo, p, length); 33117680Spst return (1); 33217680Spst 33356896Sfenner#ifdef INET6 33456896Sfenner case ETHERTYPE_IPV6: 335235530Sdelphij ip6_print(ndo, p, length); 33656896Sfenner return (1); 33756896Sfenner#endif /*INET6*/ 33856896Sfenner 33917680Spst case ETHERTYPE_ARP: 34017680Spst case ETHERTYPE_REVARP: 341235530Sdelphij arp_print(ndo, p, length, caplen); 34217680Spst return (1); 34317680Spst 34417680Spst case ETHERTYPE_DN: 345235530Sdelphij decnet_print(/*ndo,*/p, length, caplen); 34617680Spst return (1); 34717680Spst 34817680Spst case ETHERTYPE_ATALK: 349235530Sdelphij if (ndo->ndo_vflag) 35017680Spst fputs("et1 ", stdout); 351235530Sdelphij atalk_print(/*ndo,*/p, length); 35217680Spst return (1); 35317680Spst 35417680Spst case ETHERTYPE_AARP: 355235530Sdelphij aarp_print(/*ndo,*/p, length); 35617680Spst return (1); 35717680Spst 35818308Spst case ETHERTYPE_IPX: 359235530Sdelphij ND_PRINT((ndo, "(NOV-ETHII) ")); 360235530Sdelphij ipx_print(/*ndo,*/p, length); 36118308Spst return (1); 36218308Spst 363146778Ssam case ETHERTYPE_ISO: 364235530Sdelphij isoclns_print(/*ndo,*/p+1, length-1, length-1); 365146778Ssam return(1); 366146778Ssam 36756896Sfenner case ETHERTYPE_PPPOED: 36856896Sfenner case ETHERTYPE_PPPOES: 36984019Sjulian case ETHERTYPE_PPPOED2: 37084019Sjulian case ETHERTYPE_PPPOES2: 371235530Sdelphij pppoe_print(/*ndo,*/p, length); 372127675Sbms return (1); 373127675Sbms 374146778Ssam case ETHERTYPE_EAPOL: 375235530Sdelphij eap_print(ndo, p, length); 376146778Ssam return (1); 377146778Ssam 378190207Srpaulo case ETHERTYPE_RRCP: 379235530Sdelphij rrcp_print(ndo, p - 14 , length + 14); 380190207Srpaulo return (1); 381190207Srpaulo 38298527Sfenner case ETHERTYPE_PPP: 38398527Sfenner if (length) { 38498527Sfenner printf(": "); 385235530Sdelphij ppp_print(/*ndo,*/p, length); 38698527Sfenner } 38798527Sfenner return (1); 38898527Sfenner 389190207Srpaulo case ETHERTYPE_MPCP: 390235530Sdelphij mpcp_print(/*ndo,*/p, length); 391190207Srpaulo return (1); 392190207Srpaulo 393162021Ssam case ETHERTYPE_SLOW: 394235530Sdelphij slow_print(/*ndo,*/p, length); 395162021Ssam return (1); 396162021Ssam 397190207Srpaulo case ETHERTYPE_CFM: 398190207Srpaulo case ETHERTYPE_CFM_OLD: 399235530Sdelphij cfm_print(/*ndo,*/p, length); 400190207Srpaulo return (1); 401190207Srpaulo 402190207Srpaulo case ETHERTYPE_LLDP: 403235530Sdelphij lldp_print(/*ndo,*/p, length); 404190207Srpaulo return (1); 405190207Srpaulo 406127675Sbms case ETHERTYPE_LOOPBACK: 407147904Ssam return (1); 408127675Sbms 40998527Sfenner case ETHERTYPE_MPLS: 41098527Sfenner case ETHERTYPE_MPLS_MULTI: 411235530Sdelphij mpls_print(/*ndo,*/p, length); 41298527Sfenner return (1); 41398527Sfenner 414241235Sdelphij case ETHERTYPE_TIPC: 415241235Sdelphij tipc_print(ndo, p, length, caplen); 416241235Sdelphij return (1); 417241235Sdelphij 418251158Sdelphij case ETHERTYPE_MS_NLB_HB: 419251158Sdelphij msnlb_print(ndo, p, length); 420251158Sdelphij return (1); 421251158Sdelphij 42217680Spst case ETHERTYPE_LAT: 42317680Spst case ETHERTYPE_SCA: 42417680Spst case ETHERTYPE_MOPRC: 42517680Spst case ETHERTYPE_MOPDL: 42617680Spst /* default_print for now */ 42717680Spst default: 42817680Spst return (0); 42917680Spst } 43017680Spst} 431146778Ssam 432146778Ssam 433146778Ssam/* 434146778Ssam * Local Variables: 435146778Ssam * c-style: whitesmith 436146778Ssam * c-basic-offset: 8 437146778Ssam * End: 438146778Ssam */ 439146778Ssam 440