external/bsd/tcpdump/dist/print-ether.c

   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 #include <sys/cdefs.h>
  23 #ifndef lint
  24 __RCSID("$NetBSD: print-ether.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
  25 #endif
  26
  27 #define NETDISSECT_REWORKED
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <tcpdump-stdinc.h>
  33
  34 #include "interface.h"
  35 #include "extract.h"
  36 #include "addrtoname.h"
  37 #include "ethertype.h"
  38 #include "ether.h"
  39
  40 const struct tok ethertype_values[] = {
  41     { ETHERTYPE_IP,             "IPv4" },
  42     { ETHERTYPE_MPLS,           "MPLS unicast" },
  43     { ETHERTYPE_MPLS_MULTI,     "MPLS multicast" },
  44     { ETHERTYPE_IPV6,           "IPv6" },
  45     { ETHERTYPE_8021Q,          "802.1Q" },
  46     { ETHERTYPE_8021Q9100,      "802.1Q-9100" },
  47     { ETHERTYPE_8021QinQ,       "802.1Q-QinQ" },
  48     { ETHERTYPE_8021Q9200,      "802.1Q-9200" },
  49     { ETHERTYPE_VMAN,           "VMAN" },
  50     { ETHERTYPE_PUP,            "PUP" },
  51     { ETHERTYPE_ARP,            "ARP"},
  52     { ETHERTYPE_REVARP,         "Reverse ARP"},
  53     { ETHERTYPE_NS,             "NS" },
  54     { ETHERTYPE_SPRITE,         "Sprite" },
  55     { ETHERTYPE_TRAIL,          "Trail" },
  56     { ETHERTYPE_MOPDL,          "MOP DL" },
  57     { ETHERTYPE_MOPRC,          "MOP RC" },
  58     { ETHERTYPE_DN,             "DN" },
  59     { ETHERTYPE_LAT,            "LAT" },
  60     { ETHERTYPE_SCA,            "SCA" },
  61     { ETHERTYPE_TEB,            "TEB" },
  62     { ETHERTYPE_LANBRIDGE,      "Lanbridge" },
  63     { ETHERTYPE_DECDNS,         "DEC DNS" },
  64     { ETHERTYPE_DECDTS,         "DEC DTS" },
  65     { ETHERTYPE_VEXP,           "VEXP" },
  66     { ETHERTYPE_VPROD,          "VPROD" },
  67     { ETHERTYPE_ATALK,          "Appletalk" },
  68     { ETHERTYPE_AARP,           "Appletalk ARP" },
  69     { ETHERTYPE_IPX,            "IPX" },
  70     { ETHERTYPE_PPP,            "PPP" },
  71     { ETHERTYPE_MPCP,           "MPCP" },
  72     { ETHERTYPE_SLOW,           "Slow Protocols" },
  73     { ETHERTYPE_PPPOED,         "PPPoE D" },
  74     { ETHERTYPE_PPPOES,         "PPPoE S" },
  75     { ETHERTYPE_EAPOL,          "EAPOL" },
  76     { ETHERTYPE_RRCP,           "RRCP" },
  77     { ETHERTYPE_MS_NLB_HB,      "MS NLB heartbeat" },
  78     { ETHERTYPE_JUMBO,          "Jumbo" },
  79     { ETHERTYPE_LOOPBACK,       "Loopback" },
  80     { ETHERTYPE_ISO,            "OSI" },
  81     { ETHERTYPE_GRE_ISO,        "GRE-OSI" },
  82     { ETHERTYPE_CFM_OLD,        "CFM (old)" },
  83     { ETHERTYPE_CFM,            "CFM" },
  84     { ETHERTYPE_IEEE1905_1,     "IEEE1905.1" },
  85     { ETHERTYPE_LLDP,           "LLDP" },
  86     { ETHERTYPE_TIPC,           "TIPC"},
  87     { ETHERTYPE_GEONET_OLD,     "GeoNet (old)"},
  88     { ETHERTYPE_GEONET,         "GeoNet"},
  89     { ETHERTYPE_CALM_FAST,      "CALM FAST"},
  90     { ETHERTYPE_AOE,            "AoE" },
  91     { 0, NULL}
  92 };
  93
  94 static inline void
  95 ether_hdr_print(netdissect_options *ndo,
  96                 const u_char *bp, u_int length)
  97 {
  98         register const struct ether_header *ep;
  99         uint16_t ether_type;
 100
 101         ep = (const struct ether_header *)bp;
 102
 103         ND_PRINT((ndo, "%s > %s",
 104                      etheraddr_string(ndo, ESRC(ep)),
 105                      etheraddr_string(ndo, EDST(ep))));
 106
 107         ether_type = EXTRACT_16BITS(&ep->ether_type);
 108         if (!ndo->ndo_qflag) {
 109                 if (ether_type <= ETHERMTU)
 110                           ND_PRINT((ndo, ", 802.3"));
 111                 else
 112                           ND_PRINT((ndo, ", ethertype %s (0x%04x)",
 113                                        tok2str(ethertype_values,"Unknown", ether_type),
 114                                        ether_type));
 115         } else {
 116                 if (ether_type <= ETHERMTU)
 117                           ND_PRINT((ndo, ", 802.3"));
 118                 else
 119                           ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type)));
 120         }
 121
 122         ND_PRINT((ndo, ", length %u: ", length));
 123 }
 124
 125 /*
 126  * Print an Ethernet frame.
 127  * This might be encapsulated within another frame; we might be passed
 128  * a pointer to a function that can print header information for that
 129  * frame's protocol, and an argument to pass to that function.
 130  */
 131 void
 132 ether_print(netdissect_options *ndo,
 133             const u_char *p, u_int length, u_int caplen,
 134             void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg)
 135 {
 136         struct ether_header *ep;
 137         u_int orig_length;
 138         u_short ether_type;
 139         u_short extracted_ether_type;
 140
 141         if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) {
 142                 ND_PRINT((ndo, "[|ether]"));
 143                 return;
 144         }
 145
 146         if (ndo->ndo_eflag) {
 147                 if (print_encap_header != NULL)
 148                         (*print_encap_header)(ndo, encap_header_arg);
 149                 ether_hdr_print(ndo, p, length);
 150         }
 151         orig_length = length;
 152
 153         length -= ETHER_HDRLEN;
 154         caplen -= ETHER_HDRLEN;
 155         ep = (struct ether_header *)p;
 156         p += ETHER_HDRLEN;
 157
 158         ether_type = EXTRACT_16BITS(&ep->ether_type);
 159
 160 recurse:
 161         /*
 162          * Is it (gag) an 802.3 encapsulation?
 163          */
 164         if (ether_type <= ETHERMTU) {
 165                 /* Try to print the LLC-layer header & higher layers */
 166                 if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep),
 167                     &extracted_ether_type) == 0) {
 168                         /* ether_type not known, print raw packet */
 169                         if (!ndo->ndo_eflag) {
 170                                 if (print_encap_header != NULL)
 171                                         (*print_encap_header)(ndo, encap_header_arg);
 172                                 ether_hdr_print(ndo, (u_char *)ep, orig_length);
 173                         }
 174
 175                         if (!ndo->ndo_suppress_default_print)
 176                                 ND_DEFAULTPRINT(p, caplen);
 177                 }
 178         } else if (ether_type == ETHERTYPE_8021Q  ||
 179                 ether_type == ETHERTYPE_8021Q9100 ||
 180                 ether_type == ETHERTYPE_8021Q9200 ||
 181                 ether_type == ETHERTYPE_8021QinQ) {
 182                 /*
 183                  * Print VLAN information, and then go back and process
 184                  * the enclosed type field.
 185                  */
 186                 if (caplen < 4 || length < 4) {
 187                         ND_PRINT((ndo, "[|vlan]"));
 188                         return;
 189                 }
 190                 if (ndo->ndo_eflag) {
 191                         uint16_t tag = EXTRACT_16BITS(p);
 192
 193                         ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag)));
 194                 }
 195
 196                 ether_type = EXTRACT_16BITS(p + 2);
 197                 if (ndo->ndo_eflag && ether_type > ETHERMTU)
 198                         ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", ether_type)));
 199                 p += 4;
 200                 length -= 4;
 201                 caplen -= 4;
 202                 goto recurse;
 203         } else if (ether_type == ETHERTYPE_JUMBO) {
 204                 /*
 205                  * Alteon jumbo frames.
 206                  * See
 207                  *
 208                  *      http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01
 209                  *
 210                  * which indicates that, following the type field,
 211                  * there's an LLC header and payload.
 212                  */
 213                 /* Try to print the LLC-layer header & higher layers */
 214                 if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep),
 215                     &extracted_ether_type) == 0) {
 216                         /* ether_type not known, print raw packet */
 217                         if (!ndo->ndo_eflag) {
 218                                 if (print_encap_header != NULL)
 219                                         (*print_encap_header)(ndo, encap_header_arg);
 220                                 ether_hdr_print(ndo, (u_char *)ep, orig_length);
 221                         }
 222
 223                         if (!ndo->ndo_suppress_default_print)
 224                                 ND_DEFAULTPRINT(p, caplen);
 225                 }
 226         } else {
 227                 if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) {
 228                         /* ether_type not known, print raw packet */
 229                         if (!ndo->ndo_eflag) {
 230                                 if (print_encap_header != NULL)
 231                                         (*print_encap_header)(ndo, encap_header_arg);
 232                                 ether_hdr_print(ndo, (u_char *)ep, orig_length);
 233                         }
 234
 235                         if (!ndo->ndo_suppress_default_print)
 236                                 ND_DEFAULTPRINT(p, caplen);
 237                 }
 238         }
 239 }
 240
 241 /*
 242  * This is the top level routine of the printer.  'p' points
 243  * to the ether header of the packet, 'h->ts' is the timestamp,
 244  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 245  * is the number of bytes actually captured.
 246  */
 247 u_int
 248 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 249                const u_char *p)
 250 {
 251         ether_print(ndo, p, h->len, h->caplen, NULL, NULL);
 252
 253         return (ETHER_HDRLEN);
 254 }
 255
 256 /*
 257  * This is the top level routine of the printer.  'p' points
 258  * to the ether header of the packet, 'h->ts' is the timestamp,
 259  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 260  * is the number of bytes actually captured.
 261  *
 262  * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header
 263  * before the Ethernet header.
 264  */
 265 u_int
 266 netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 267                      const u_char *p)
 268 {
 269         /*
 270          * Fail if we don't have enough data for the Hilscher pseudo-header.
 271          */
 272         if (h->len < 4 || h->caplen < 4) {
 273                 ND_PRINT((ndo, "[|netanalyzer]"));
 274                 return (h->caplen);
 275         }
 276
 277         /* Skip the pseudo-header. */
 278         ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL);
 279
 280         return (4 + ETHER_HDRLEN);
 281 }
 282
 283 /*
 284  * This is the top level routine of the printer.  'p' points
 285  * to the ether header of the packet, 'h->ts' is the timestamp,
 286  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 287  * is the number of bytes actually captured.
 288  *
 289  * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte
 290  * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF
 291  * before the Ethernet header.
 292  */
 293 u_int
 294 netanalyzer_transparent_if_print(netdissect_options *ndo,
 295                                  const struct pcap_pkthdr *h,
 296                                  const u_char *p)
 297 {
 298         /*
 299          * Fail if we don't have enough data for the Hilscher pseudo-header,
 300          * preamble, and SOF.
 301          */
 302         if (h->len < 12 || h->caplen < 12) {
 303                 ND_PRINT((ndo, "[|netanalyzer-transparent]"));
 304                 return (h->caplen);
 305         }
 306
 307         /* Skip the pseudo-header, preamble, and SOF. */
 308         ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL);
 309
 310         return (12 + ETHER_HDRLEN);
 311 }
 312
 313 /*
 314  * Prints the packet payload, given an Ethernet type code for the payload's
 315  * protocol.
 316  *
 317  * Returns non-zero if it can do so, zero if the ethertype is unknown.
 318  */
 319
 320 int
 321 ethertype_print(netdissect_options *ndo,
 322                 u_short ether_type, const u_char *p,
 323                 u_int length, u_int caplen)
 324 {
 325         switch (ether_type) {
 326
 327         case ETHERTYPE_IP:
 328                 ip_print(ndo, p, length);
 329                 return (1);
 330
 331         case ETHERTYPE_IPV6:
 332                 ip6_print(ndo, p, length);
 333                 return (1);
 334
 335         case ETHERTYPE_ARP:
 336         case ETHERTYPE_REVARP:
 337                 arp_print(ndo, p, length, caplen);
 338                 return (1);
 339
 340         case ETHERTYPE_DN:
 341                 decnet_print(ndo, p, length, caplen);
 342                 return (1);
 343
 344         case ETHERTYPE_ATALK:
 345                 if (ndo->ndo_vflag)
 346                         ND_PRINT((ndo, "et1 "));
 347                 atalk_print(ndo, p, length);
 348                 return (1);
 349
 350         case ETHERTYPE_AARP:
 351                 aarp_print(ndo, p, length);
 352                 return (1);
 353
 354         case ETHERTYPE_IPX:
 355                 ND_PRINT((ndo, "(NOV-ETHII) "));
 356                 ipx_print(ndo, p, length);
 357                 return (1);
 358
 359         case ETHERTYPE_ISO:
 360                 isoclns_print(ndo, p + 1, length - 1, length - 1);
 361                 return(1);
 362
 363         case ETHERTYPE_PPPOED:
 364         case ETHERTYPE_PPPOES:
 365         case ETHERTYPE_PPPOED2:
 366         case ETHERTYPE_PPPOES2:
 367                 pppoe_print(ndo, p, length);
 368                 return (1);
 369
 370         case ETHERTYPE_EAPOL:
 371                 eap_print(ndo, p, length);
 372                 return (1);
 373
 374         case ETHERTYPE_RRCP:
 375                 rrcp_print(ndo, p - 14 , length + 14);
 376                 return (1);
 377
 378         case ETHERTYPE_PPP:
 379                 if (length) {
 380                         ND_PRINT((ndo, ": "));
 381                         ppp_print(ndo, p, length);
 382                 }
 383                 return (1);
 384
 385         case ETHERTYPE_MPCP:
 386                 mpcp_print(ndo, p, length);
 387                 return (1);
 388
 389         case ETHERTYPE_SLOW:
 390                 slow_print(ndo, p, length);
 391                 return (1);
 392
 393         case ETHERTYPE_CFM:
 394         case ETHERTYPE_CFM_OLD:
 395                 cfm_print(ndo, p, length);
 396                 return (1);
 397
 398         case ETHERTYPE_LLDP:
 399                 lldp_print(ndo, p, length);
 400                 return (1);
 401
 402         case ETHERTYPE_LOOPBACK:
 403                 loopback_print(ndo, p, length);
 404                 return (1);
 405
 406         case ETHERTYPE_MPLS:
 407         case ETHERTYPE_MPLS_MULTI:
 408                 mpls_print(ndo, p, length);
 409                 return (1);
 410
 411         case ETHERTYPE_TIPC:
 412                 tipc_print(ndo, p, length, caplen);
 413                 return (1);
 414
 415         case ETHERTYPE_MS_NLB_HB:
 416                 msnlb_print(ndo, p);
 417                 return (1);
 418
 419         case ETHERTYPE_GEONET_OLD:
 420         case ETHERTYPE_GEONET:
 421                 geonet_print(ndo, p-14, p, length);
 422                 return (1);
 423
 424         case ETHERTYPE_CALM_FAST:
 425                 calm_fast_print(ndo, p-14, p, length);
 426                 return (1);
 427
 428         case ETHERTYPE_AOE:
 429                 aoe_print(ndo, p, length);
 430                 return (1);
 431
 432         case ETHERTYPE_LAT:
 433         case ETHERTYPE_SCA:
 434         case ETHERTYPE_MOPRC:
 435         case ETHERTYPE_MOPDL:
 436         case ETHERTYPE_IEEE1905_1:
 437                 /* default_print for now */
 438         default:
 439                 return (0);
 440         }
 441 }
 442
 443
 444 /*
 445  * Local Variables:
 446  * c-style: whitesmith
 447  * c-basic-offset: 8
 448  * End:
 449  */
 450