The Tcpdump Group git mirrors - tcpdump/blob - print-slow.c

   1 /*
   2  * Copyright (c) 1998-2006 The TCPDUMP project
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that: (1) source code
   6  * distributions retain the above copyright notice and this paragraph
   7  * in its entirety, and (2) distributions including binary code include
   8  * the above copyright notice and this paragraph in its entirety in
   9  * the documentation or other materials provided with the distribution.
  10  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
  11  * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
  12  * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  13  * FOR A PARTICULAR PURPOSE.
  14  *
  15  * support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad
  16  *                                       OAM as per 802.3ah
  17  *
  18  * Original code by Hannes Gredler (hannes@juniper.net)
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include <tcpdump-stdinc.h>
  26
  27 #include "interface.h"
  28 #include "extract.h"
  29 #include "addrtoname.h"
  30 #include "ether.h"
  31 #include "oui.h"
  32
  33 struct slow_common_header_t {
  34     uint8_t proto_subtype;
  35     uint8_t version;
  36 };
  37
  38 #define SLOW_PROTO_LACP                     1
  39 #define SLOW_PROTO_MARKER                   2
  40 #define SLOW_PROTO_OAM                      3
  41
  42 #define LACP_VERSION                        1
  43 #define MARKER_VERSION                      1
  44
  45 static const struct tok slow_proto_values[] = {
  46     { SLOW_PROTO_LACP, "LACP" },
  47     { SLOW_PROTO_MARKER, "MARKER" },
  48     { SLOW_PROTO_OAM, "OAM" },
  49     { 0, NULL}
  50 };
  51
  52 static const struct tok slow_oam_flag_values[] = {
  53     { 0x0001, "Link Fault" },
  54     { 0x0002, "Dying Gasp" },
  55     { 0x0004, "Critical Event" },
  56     { 0x0008, "Local Evaluating" },
  57     { 0x0010, "Local Stable" },
  58     { 0x0020, "Remote Evaluating" },
  59     { 0x0040, "Remote Stable" },
  60     { 0, NULL}
  61 };
  62
  63 #define SLOW_OAM_CODE_INFO          0x00
  64 #define SLOW_OAM_CODE_EVENT_NOTIF   0x01
  65 #define SLOW_OAM_CODE_VAR_REQUEST   0x02
  66 #define SLOW_OAM_CODE_VAR_RESPONSE  0x03
  67 #define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
  68 #define SLOW_OAM_CODE_PRIVATE       0xfe
  69
  70 static const struct tok slow_oam_code_values[] = {
  71     { SLOW_OAM_CODE_INFO, "Information" },
  72     { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
  73     { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
  74     { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
  75     { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
  76     { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
  77     { 0, NULL}
  78 };
  79
  80 struct slow_oam_info_t {
  81     uint8_t info_type;
  82     uint8_t info_length;
  83     uint8_t oam_version;
  84     uint8_t revision[2];
  85     uint8_t state;
  86     uint8_t oam_config;
  87     uint8_t oam_pdu_config[2];
  88     uint8_t oui[3];
  89     uint8_t vendor_private[4];
  90 };
  91
  92 #define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
  93 #define SLOW_OAM_INFO_TYPE_LOCAL 0x01
  94 #define SLOW_OAM_INFO_TYPE_REMOTE 0x02
  95 #define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe
  96
  97 static const struct tok slow_oam_info_type_values[] = {
  98     { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
  99     { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
 100     { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
 101     { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
 102     { 0, NULL}
 103 };
 104
 105 #define OAM_INFO_TYPE_PARSER_MASK 0x3
 106 static const struct tok slow_oam_info_type_state_parser_values[] = {
 107     { 0x00, "forwarding" },
 108     { 0x01, "looping back" },
 109     { 0x02, "discarding" },
 110     { 0x03, "reserved" },
 111     { 0, NULL}
 112 };
 113
 114 #define OAM_INFO_TYPE_MUX_MASK 0x4
 115 static const struct tok slow_oam_info_type_state_mux_values[] = {
 116     { 0x00, "forwarding" },
 117     { 0x04, "discarding" },
 118     { 0, NULL}
 119 };
 120
 121 static const struct tok slow_oam_info_type_oam_config_values[] = {
 122     { 0x01, "Active" },
 123     { 0x02, "Unidirectional" },
 124     { 0x04, "Remote-Loopback" },
 125     { 0x08, "Link-Events" },
 126     { 0x10, "Variable-Retrieval" },
 127     { 0, NULL}
 128 };
 129
 130 /* 11 Bits */
 131 #define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
 132
 133 #define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
 134 #define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
 135 #define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
 136 #define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
 137 #define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
 138 #define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe
 139
 140 static const struct tok slow_oam_link_event_values[] = {
 141     { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
 142     { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
 143     { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
 144     { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
 145     { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
 146     { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
 147     { 0, NULL}
 148 };
 149
 150 struct slow_oam_link_event_t {
 151     uint8_t event_type;
 152     uint8_t event_length;
 153     uint8_t time_stamp[2];
 154     uint8_t window[8];
 155     uint8_t threshold[8];
 156     uint8_t errors[8];
 157     uint8_t errors_running_total[8];
 158     uint8_t event_running_total[4];
 159 };
 160
 161 struct slow_oam_variablerequest_t {
 162     uint8_t branch;
 163     uint8_t leaf[2];
 164 };
 165
 166 struct slow_oam_variableresponse_t {
 167     uint8_t branch;
 168     uint8_t leaf[2];
 169     uint8_t length;
 170 };
 171
 172 struct slow_oam_loopbackctrl_t {
 173     uint8_t command;
 174 };
 175
 176 static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
 177     { 0x01, "Enable OAM Remote Loopback" },
 178     { 0x02, "Disable OAM Remote Loopback" },
 179     { 0, NULL}
 180 };
 181
 182 struct tlv_header_t {
 183     uint8_t type;
 184     uint8_t length;
 185 };
 186
 187 #define LACP_TLV_TERMINATOR     0x00
 188 #define LACP_TLV_ACTOR_INFO     0x01
 189 #define LACP_TLV_PARTNER_INFO   0x02
 190 #define LACP_TLV_COLLECTOR_INFO 0x03
 191
 192 #define MARKER_TLV_TERMINATOR   0x00
 193 #define MARKER_TLV_MARKER_INFO  0x01
 194
 195 static const struct tok slow_tlv_values[] = {
 196     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
 197     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
 198     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
 199     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
 200
 201     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
 202     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
 203     { 0, NULL}
 204 };
 205
 206 struct lacp_tlv_actor_partner_info_t {
 207     uint8_t sys_pri[2];
 208     uint8_t sys[ETHER_ADDR_LEN];
 209     uint8_t key[2];
 210     uint8_t port_pri[2];
 211     uint8_t port[2];
 212     uint8_t state;
 213     uint8_t pad[3];
 214 };
 215
 216 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
 217     { 0x01, "Activity"},
 218     { 0x02, "Timeout"},
 219     { 0x04, "Aggregation"},
 220     { 0x08, "Synchronization"},
 221     { 0x10, "Collecting"},
 222     { 0x20, "Distributing"},
 223     { 0x40, "Default"},
 224     { 0x80, "Expired"},
 225     { 0, NULL}
 226 };
 227
 228 struct lacp_tlv_collector_info_t {
 229     uint8_t max_delay[2];
 230     uint8_t pad[12];
 231 };
 232
 233 struct marker_tlv_marker_info_t {
 234     uint8_t req_port[2];
 235     uint8_t req_sys[ETHER_ADDR_LEN];
 236     uint8_t req_trans_id[4];
 237     uint8_t pad[2];
 238 };
 239
 240 struct lacp_marker_tlv_terminator_t {
 241     uint8_t pad[50];
 242 };
 243
 244 static void slow_marker_lacp_print(netdissect_options *, register const u_char *, register u_int);
 245 static void slow_oam_print(netdissect_options *, register const u_char *, register u_int);
 246
 247 const struct slow_common_header_t *slow_com_header;
 248
 249 void
 250 slow_print(netdissect_options *ndo,
 251            register const u_char *pptr, register u_int len)
 252 {
 253     int print_version;
 254
 255     slow_com_header = (const struct slow_common_header_t *)pptr;
 256     ND_TCHECK(*slow_com_header);
 257
 258     /*
 259      * Sanity checking of the header.
 260      */
 261     switch (slow_com_header->proto_subtype) {
 262     case SLOW_PROTO_LACP:
 263         if (slow_com_header->version != LACP_VERSION) {
 264             ND_PRINT((ndo, "LACP version %u packet not supported",slow_com_header->version));
 265             return;
 266         }
 267         print_version = 1;
 268         break;
 269
 270     case SLOW_PROTO_MARKER:
 271         if (slow_com_header->version != MARKER_VERSION) {
 272             ND_PRINT((ndo, "MARKER version %u packet not supported",slow_com_header->version));
 273             return;
 274         }
 275         print_version = 1;
 276         break;
 277
 278     case SLOW_PROTO_OAM: /* fall through */
 279         print_version = 0;
 280         break;
 281
 282     default:
 283         /* print basic information and exit */
 284         print_version = -1;
 285         break;
 286     }
 287
 288     if (print_version) {
 289         ND_PRINT((ndo, "%sv%u, length %u",
 290                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 291                slow_com_header->version,
 292                len));
 293     } else {
 294         /* some slow protos don't have a version number in the header */
 295         ND_PRINT((ndo, "%s, length %u",
 296                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 297                len));
 298     }
 299
 300     /* unrecognized subtype */
 301     if (print_version == -1) {
 302         print_unknown_data(ndo, pptr, "\n\t", len);
 303         return;
 304     }
 305
 306     if (!ndo->ndo_vflag)
 307         return;
 308
 309     switch (slow_com_header->proto_subtype) {
 310     default: /* should not happen */
 311         break;
 312
 313     case SLOW_PROTO_OAM:
 314         /* skip proto_subtype */
 315         slow_oam_print(ndo, pptr+1, len-1);
 316         break;
 317
 318     case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
 319     case SLOW_PROTO_MARKER:
 320         /* skip slow_common_header */
 321         len -= sizeof(const struct slow_common_header_t);
 322         pptr += sizeof(const struct slow_common_header_t);
 323         slow_marker_lacp_print(ndo, pptr, len);
 324         break;
 325     }
 326     return;
 327
 328 trunc:
 329     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 330 }
 331
 332 static void
 333 slow_marker_lacp_print(netdissect_options *ndo,
 334                        register const u_char *tptr, register u_int tlen)
 335 {
 336     const struct tlv_header_t *tlv_header;
 337     const u_char *tlv_tptr;
 338     u_int tlv_len, tlv_tlen;
 339
 340     union {
 341         const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
 342         const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
 343         const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
 344         const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
 345     } tlv_ptr;
 346
 347     while(tlen>0) {
 348         /* did we capture enough for fully decoding the tlv header ? */
 349         ND_TCHECK2(*tptr, sizeof(struct tlv_header_t));
 350         tlv_header = (const struct tlv_header_t *)tptr;
 351         tlv_len = tlv_header->length;
 352
 353         ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u",
 354                tok2str(slow_tlv_values,
 355                        "Unknown",
 356                        (slow_com_header->proto_subtype << 8) + tlv_header->type),
 357                tlv_header->type,
 358                tlv_len));
 359
 360         if ((tlv_len < sizeof(struct tlv_header_t) ||
 361             tlv_len > tlen) &&
 362             tlv_header->type != LACP_TLV_TERMINATOR &&
 363             tlv_header->type != MARKER_TLV_TERMINATOR) {
 364             ND_PRINT((ndo, "\n\t-----trailing data-----"));
 365             print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t  ", tlen);
 366             return;
 367         }
 368
 369         tlv_tptr=tptr+sizeof(struct tlv_header_t);
 370         tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
 371
 372         /* did we capture enough for fully decoding the tlv ? */
 373         ND_TCHECK2(*tptr, tlv_len);
 374
 375         switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
 376
 377             /* those two TLVs have the same structure -> fall through */
 378         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
 379         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
 380             tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
 381
 382             ND_PRINT((ndo, "\n\t  System %s, System Priority %u, Key %u" \
 383                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 384                    etheraddr_string(ndo, tlv_ptr.lacp_tlv_actor_partner_info->sys),
 385                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
 386                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
 387                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
 388                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
 389                    bittok2str(lacp_tlv_actor_partner_info_state_values,
 390                               "none",
 391                               tlv_ptr.lacp_tlv_actor_partner_info->state)));
 392
 393             break;
 394
 395         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
 396             tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
 397
 398             ND_PRINT((ndo, "\n\t  Max Delay %u",
 399                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay)));
 400
 401             break;
 402
 403         case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
 404             tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
 405
 406             ND_PRINT((ndo, "\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 407                    etheraddr_string(ndo, tlv_ptr.marker_tlv_marker_info->req_sys),
 408                    EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
 409                    EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id)));
 410
 411             break;
 412
 413             /* those two TLVs have the same structure -> fall through */
 414         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
 415         case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
 416             tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
 417             if (tlv_len == 0) {
 418                 tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
 419                     sizeof(struct tlv_header_t);
 420                 /* tell the user that we modified the length field  */
 421                 if (ndo->ndo_vflag>1)
 422                     ND_PRINT((ndo, " (=%u)", tlv_len));
 423                 /* we have messed around with the length field - now we need to check
 424                  * again if there are enough bytes on the wire for the hexdump */
 425                 ND_TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
 426                         sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
 427             }
 428
 429             break;
 430
 431         default:
 432             if (ndo->ndo_vflag <= 1)
 433                 print_unknown_data(ndo, tlv_tptr, "\n\t  ", tlv_tlen);
 434             break;
 435         }
 436         /* do we want to see an additional hexdump ? */
 437         if (ndo->ndo_vflag > 1) {
 438             print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t  ",
 439                                tlv_len-sizeof(struct tlv_header_t));
 440         }
 441
 442         tptr+=tlv_len;
 443         tlen-=tlv_len;
 444     }
 445     return;
 446 trunc:
 447     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 448 }
 449
 450 static void
 451 slow_oam_print(netdissect_options *ndo,
 452                register const u_char *tptr, register u_int tlen)
 453 {
 454     u_int hexdump;
 455
 456     struct slow_oam_common_header_t {
 457         uint8_t flags[2];
 458         uint8_t code;
 459     };
 460
 461     struct slow_oam_tlv_header_t {
 462         uint8_t type;
 463         uint8_t length;
 464     };
 465
 466     union {
 467         const struct slow_oam_common_header_t *slow_oam_common_header;
 468         const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
 469     } ptr;
 470
 471     union {
 472         const struct slow_oam_info_t *slow_oam_info;
 473         const struct slow_oam_link_event_t *slow_oam_link_event;
 474         const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
 475         const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
 476         const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
 477     } tlv;
 478
 479     ptr.slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
 480     tptr += sizeof(struct slow_oam_common_header_t);
 481     tlen -= sizeof(struct slow_oam_common_header_t);
 482
 483     ND_PRINT((ndo, "\n\tCode %s OAM PDU, Flags [%s]",
 484            tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
 485            bittok2str(slow_oam_flag_values,
 486                       "none",
 487                       EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));
 488
 489     switch (ptr.slow_oam_common_header->code) {
 490     case SLOW_OAM_CODE_INFO:
 491         while (tlen > 0) {
 492             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 493             ND_PRINT((ndo, "\n\t  %s Information Type (%u), length %u",
 494                    tok2str(slow_oam_info_type_values, "Reserved",
 495                            ptr.slow_oam_tlv_header->type),
 496                    ptr.slow_oam_tlv_header->type,
 497                    ptr.slow_oam_tlv_header->length));
 498
 499             hexdump = FALSE;
 500             switch (ptr.slow_oam_tlv_header->type) {
 501             case SLOW_OAM_INFO_TYPE_END_OF_TLV:
 502                 if (ptr.slow_oam_tlv_header->length != 0) {
 503                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be 0"));
 504                 }
 505                 return;
 506
 507             case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
 508             case SLOW_OAM_INFO_TYPE_REMOTE:
 509                 tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
 510
 511                 if (tlv.slow_oam_info->info_length !=
 512                     sizeof(struct slow_oam_info_t)) {
 513                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
 514                            (unsigned long) sizeof(struct slow_oam_info_t)));
 515                     return;
 516                 }
 517
 518                 ND_PRINT((ndo, "\n\t    OAM-Version %u, Revision %u",
 519                        tlv.slow_oam_info->oam_version,
 520                        EXTRACT_16BITS(&tlv.slow_oam_info->revision)));
 521
 522                 ND_PRINT((ndo, "\n\t    State-Parser-Action %s, State-MUX-Action %s",
 523                        tok2str(slow_oam_info_type_state_parser_values, "Reserved",
 524                                tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
 525                        tok2str(slow_oam_info_type_state_mux_values, "Reserved",
 526                                tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK)));
 527                 ND_PRINT((ndo, "\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
 528                        bittok2str(slow_oam_info_type_oam_config_values, "none",
 529                                   tlv.slow_oam_info->oam_config),
 530                        EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
 531                        OAM_INFO_TYPE_PDU_SIZE_MASK));
 532                 ND_PRINT((ndo, "\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
 533                        tok2str(oui_values, "Unknown",
 534                                EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
 535                        EXTRACT_24BITS(&tlv.slow_oam_info->oui),
 536                        EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private)));
 537                 break;
 538
 539             case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
 540                 hexdump = TRUE;
 541                 break;
 542
 543             default:
 544                 hexdump = TRUE;
 545                 break;
 546             }
 547
 548             /* infinite loop check */
 549             if (!ptr.slow_oam_tlv_header->length) {
 550                 return;
 551             }
 552
 553             /* do we also want to see a hex dump ? */
 554             if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
 555                 print_unknown_data(ndo, tptr, "\n\t  ",
 556                                    ptr.slow_oam_tlv_header->length);
 557             }
 558
 559             tlen -= ptr.slow_oam_tlv_header->length;
 560             tptr += ptr.slow_oam_tlv_header->length;
 561         }
 562         break;
 563
 564     case SLOW_OAM_CODE_EVENT_NOTIF:
 565         while (tlen > 0) {
 566             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 567             ND_PRINT((ndo, "\n\t  %s Link Event Type (%u), length %u",
 568                    tok2str(slow_oam_link_event_values, "Reserved",
 569                            ptr.slow_oam_tlv_header->type),
 570                    ptr.slow_oam_tlv_header->type,
 571                    ptr.slow_oam_tlv_header->length));
 572
 573             hexdump = FALSE;
 574             switch (ptr.slow_oam_tlv_header->type) {
 575             case SLOW_OAM_LINK_EVENT_END_OF_TLV:
 576                 if (ptr.slow_oam_tlv_header->length != 0) {
 577                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be 0"));
 578                 }
 579                 return;
 580
 581             case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
 582             case SLOW_OAM_LINK_EVENT_ERR_FRM:
 583             case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
 584             case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
 585                 tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
 586
 587                 if (tlv.slow_oam_link_event->event_length !=
 588                     sizeof(struct slow_oam_link_event_t)) {
 589                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
 590                            (unsigned long) sizeof(struct slow_oam_link_event_t)));
 591                     return;
 592                 }
 593
 594                 ND_PRINT((ndo, "\n\t    Timestamp %u ms, Errored Window %" PRIu64
 595                        "\n\t    Errored Threshold %" PRIu64
 596                        "\n\t    Errors %" PRIu64
 597                        "\n\t    Error Running Total %" PRIu64
 598                        "\n\t    Event Running Total %u",
 599                        EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
 600                        EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
 601                        EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
 602                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
 603                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
 604                        EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total)));
 605                 break;
 606
 607             case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
 608                 hexdump = TRUE;
 609                 break;
 610
 611             default:
 612                 hexdump = TRUE;
 613                 break;
 614             }
 615
 616             /* infinite loop check */
 617             if (!ptr.slow_oam_tlv_header->length) {
 618                 return;
 619             }
 620
 621             /* do we also want to see a hex dump ? */
 622             if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
 623                 print_unknown_data(ndo, tptr, "\n\t  ",
 624                                    ptr.slow_oam_tlv_header->length);
 625             }
 626
 627             tlen -= ptr.slow_oam_tlv_header->length;
 628             tptr += ptr.slow_oam_tlv_header->length;
 629         }
 630         break;
 631
 632     case SLOW_OAM_CODE_LOOPBACK_CTRL:
 633         tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
 634         ND_PRINT((ndo, "\n\t  Command %s (%u)",
 635                tok2str(slow_oam_loopbackctrl_cmd_values,
 636                        "Unknown",
 637                        tlv.slow_oam_loopbackctrl->command),
 638                tlv.slow_oam_loopbackctrl->command));
 639                tptr ++;
 640                tlen --;
 641         break;
 642
 643         /*
 644          * FIXME those are the defined codes that lack a decoder
 645          * you are welcome to contribute code ;-)
 646          */
 647     case SLOW_OAM_CODE_VAR_REQUEST:
 648     case SLOW_OAM_CODE_VAR_RESPONSE:
 649     case SLOW_OAM_CODE_PRIVATE:
 650     default:
 651         if (ndo->ndo_vflag <= 1) {
 652             print_unknown_data(ndo, tptr, "\n\t  ", tlen);
 653         }
 654         break;
 655     }
 656     return;
 657 }