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 #ifndef lint
  22 static const char rcsid[] _U_ =
  23     "@(#) $Header: /tcpdump/master/tcpdump/print-slow.c,v 1.5 2006-05-18 08:23:26 hannes Exp $";
  24 #endif
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include <tcpdump-stdinc.h>
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include "interface.h"
  37 #include "extract.h"
  38 #include "addrtoname.h"
  39 #include "ether.h"
  40 #include "oui.h"
  41
  42 struct slow_common_header_t {
  43     u_int8_t proto_subtype;
  44     u_int8_t version;
  45 };
  46
  47 #define SLOW_PROTO_LACP                     1
  48 #define SLOW_PROTO_MARKER                   2
  49 #define SLOW_PROTO_OAM                      3
  50
  51 #define LACP_VERSION                        1
  52 #define MARKER_VERSION                      1
  53
  54 static const struct tok slow_proto_values[] = {
  55     { SLOW_PROTO_LACP, "LACP" },
  56     { SLOW_PROTO_MARKER, "MARKER" },
  57     { SLOW_PROTO_OAM, "OAM" },
  58     { 0, NULL}
  59 };
  60
  61 static const struct tok slow_oam_flag_values[] = {
  62     { 0x0001, "Link Fault" },
  63     { 0x0002, "Dying Gasp" },
  64     { 0x0004, "Critical Event" },
  65     { 0x0008, "Local Evaluating" },
  66     { 0x0010, "Local Stable" },
  67     { 0x0020, "Remote Evaluating" },
  68     { 0x0040, "Remote Stable" },
  69     { 0, NULL}
  70 };
  71
  72 #define SLOW_OAM_CODE_INFO          0x00
  73 #define SLOW_OAM_CODE_EVENT_NOTIF   0x01
  74 #define SLOW_OAM_CODE_VAR_REQUEST   0x02
  75 #define SLOW_OAM_CODE_VAR_RESPONSE  0x03
  76 #define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
  77 #define SLOW_OAM_CODE_PRIVATE       0xfe
  78
  79 static const struct tok slow_oam_code_values[] = {
  80     { SLOW_OAM_CODE_INFO, "Information" },
  81     { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
  82     { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
  83     { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
  84     { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
  85     { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
  86     { 0, NULL}
  87 };
  88
  89 struct slow_oam_info_t {
  90     u_int8_t info_type;
  91     u_int8_t info_length;
  92     u_int8_t oam_version;
  93     u_int8_t revision[2];
  94     u_int8_t state;
  95     u_int8_t oam_config;
  96     u_int8_t oam_pdu_config;
  97     u_int8_t oui[3];
  98     u_int8_t vendor_private[4];
  99 };
 100
 101 #define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
 102 #define SLOW_OAM_INFO_TYPE_LOCAL 0x01
 103 #define SLOW_OAM_INFO_TYPE_REMOTE 0x02
 104 #define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe
 105
 106 static const struct tok slow_oam_info_type_values[] = {
 107     { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
 108     { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
 109     { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
 110     { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
 111     { 0, NULL}
 112 };
 113
 114 #define OAM_INFO_TYPE_PARSER_MASK 0x3
 115 static const struct tok slow_oam_info_type_state_parser_values[] = {
 116     { 0x00, "forwarding" },
 117     { 0x01, "looping back" },
 118     { 0x02, "discarding" },
 119     { 0x03, "reserved" },
 120     { 0, NULL}
 121 };
 122
 123 #define OAM_INFO_TYPE_MUX_MASK 0x4
 124 static const struct tok slow_oam_info_type_state_mux_values[] = {
 125     { 0x00, "forwarding" },
 126     { 0x04, "discarding" },
 127     { 0, NULL}
 128 };
 129
 130 static const struct tok slow_oam_info_type_oam_config_values[] = {
 131     { 0x01, "Active" },
 132     { 0x02, "Unidirectional" },
 133     { 0x04, "Remote-Loopback" },
 134     { 0x08, "Link-Events" },
 135     { 0x10, "Variable-Retrieval" },
 136     { 0, NULL}
 137 };
 138
 139 /* 11 Bits */
 140 #define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
 141
 142 #define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
 143 #define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
 144 #define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
 145 #define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
 146 #define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
 147 #define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe
 148
 149 static const struct tok slow_oam_link_event_values[] = {
 150     { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
 151     { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
 152     { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
 153     { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
 154     { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
 155     { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
 156     { 0, NULL}
 157 };
 158
 159 struct slow_oam_link_event_t {
 160     u_int8_t event_type;
 161     u_int8_t event_length;
 162     u_int8_t time_stamp[2];
 163     u_int8_t window[8];
 164     u_int8_t threshold[8];
 165     u_int8_t errors[8];
 166     u_int8_t errors_running_total[8];
 167     u_int8_t event_running_total[4];
 168 };
 169
 170 struct slow_oam_variablerequest_t {
 171     u_int8_t branch;
 172     u_int8_t leaf[2];
 173 };
 174
 175 struct slow_oam_variableresponse_t {
 176     u_int8_t branch;
 177     u_int8_t leaf[2];
 178     u_int8_t length;
 179 };
 180
 181 static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
 182     { 0x01, "Enable OAM Remote Loopback" },
 183     { 0x02, "Disable OAM Remote Loopback" },
 184     { 0, NULL}
 185 };
 186
 187 struct tlv_header_t {
 188     u_int8_t type;
 189     u_int8_t length;
 190 };
 191
 192 #define LACP_TLV_TERMINATOR     0x00
 193 #define LACP_TLV_ACTOR_INFO     0x01
 194 #define LACP_TLV_PARTNER_INFO   0x02
 195 #define LACP_TLV_COLLECTOR_INFO 0x03
 196
 197 #define MARKER_TLV_TERMINATOR   0x00
 198 #define MARKER_TLV_MARKER_INFO  0x01
 199
 200 static const struct tok slow_tlv_values[] = {
 201     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
 202     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
 203     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
 204     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
 205
 206     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
 207     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
 208     { 0, NULL}
 209 };
 210
 211 struct lacp_tlv_actor_partner_info_t {
 212     u_int8_t sys_pri[2];
 213     u_int8_t sys[ETHER_ADDR_LEN];
 214     u_int8_t key[2];
 215     u_int8_t port_pri[2];
 216     u_int8_t port[2];
 217     u_int8_t state;
 218     u_int8_t pad[3];
 219 };
 220
 221 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
 222     { 0x01, "Activity"},
 223     { 0x02, "Timeout"},
 224     { 0x04, "Aggregation"},
 225     { 0x08, "Synchronization"},
 226     { 0x10, "Collecting"},
 227     { 0x20, "Distributing"},
 228     { 0x40, "Default"},
 229     { 0x80, "Expired"},
 230     { 0, NULL}
 231 };
 232
 233 struct lacp_tlv_collector_info_t {
 234     u_int8_t max_delay[2];
 235     u_int8_t pad[12];
 236 };
 237
 238 struct marker_tlv_marker_info_t {
 239     u_int8_t req_port[2];
 240     u_int8_t req_sys[ETHER_ADDR_LEN];
 241     u_int8_t req_trans_id[4];
 242     u_int8_t pad[2];
 243 };
 244
 245 struct lacp_marker_tlv_terminator_t {
 246     u_int8_t pad[50];
 247 };
 248
 249 void slow_marker_lacp_print(register const u_char *, register u_int);
 250 void slow_oam_print(register const u_char *, register u_int);
 251
 252 const struct slow_common_header_t *slow_com_header;
 253
 254 void
 255 slow_print(register const u_char *pptr, register u_int len) {
 256
 257     int print_version;
 258
 259     slow_com_header = (const struct slow_common_header_t *)pptr;
 260     TCHECK(*slow_com_header);
 261
 262     /*
 263      * Sanity checking of the header.
 264      */
 265     switch (slow_com_header->proto_subtype) {
 266     case SLOW_PROTO_LACP:
 267         if (slow_com_header->version != LACP_VERSION) {
 268             printf("LACP version %u packet not supported",slow_com_header->version);
 269             return;
 270         }
 271         print_version = 1;
 272         break;
 273
 274     case SLOW_PROTO_MARKER:
 275         if (slow_com_header->version != MARKER_VERSION) {
 276             printf("MARKER version %u packet not supported",slow_com_header->version);
 277             return;
 278         }
 279         print_version = 1;
 280         break;
 281
 282     case SLOW_PROTO_OAM: /* fall through */
 283         print_version = 0;
 284         break;
 285
 286     default:
 287         /* print basic information and exit */
 288         print_version = -1;
 289         break;
 290     }
 291
 292     if (print_version) {
 293         printf("%sv%u, length %u",
 294                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 295                slow_com_header->version,
 296                len);
 297     } else {
 298         /* some slow protos don't have a version number in the header */
 299         printf("%s, length %u",
 300                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 301                len);
 302     }
 303
 304     /* unrecognized subtype */
 305     if (print_version == -1) {
 306         print_unknown_data(pptr, "\n\t", len);
 307         return;
 308     }
 309
 310     if (!vflag)
 311         return;
 312
 313     switch (slow_com_header->proto_subtype) {
 314     default: /* should not happen */
 315         break;
 316
 317     case SLOW_PROTO_OAM:
 318         /* skip proto_subtype */
 319         slow_oam_print(pptr+1, len-1);
 320         break;
 321
 322     case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
 323     case SLOW_PROTO_MARKER:
 324         /* skip slow_common_header */
 325         len -= sizeof(const struct slow_common_header_t);
 326         pptr += sizeof(const struct slow_common_header_t);
 327         slow_marker_lacp_print(pptr, len);
 328         break;
 329     }
 330     return;
 331
 332 trunc:
 333     printf("\n\t\t packet exceeded snapshot");
 334 }
 335
 336 void slow_marker_lacp_print(register const u_char *tptr, register u_int tlen) {
 337
 338     const struct tlv_header_t *tlv_header;
 339     const u_char *tlv_tptr;
 340     u_int tlv_len, tlv_tlen;
 341
 342     union {
 343         const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
 344         const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
 345         const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
 346         const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
 347     } tlv_ptr;
 348
 349     while(tlen>0) {
 350         /* did we capture enough for fully decoding the tlv header ? */
 351         TCHECK2(*tptr, sizeof(struct tlv_header_t));
 352         tlv_header = (const struct tlv_header_t *)tptr;
 353         tlv_len = tlv_header->length;
 354
 355         printf("\n\t%s TLV (0x%02x), length %u",
 356                tok2str(slow_tlv_values,
 357                        "Unknown",
 358                        (slow_com_header->proto_subtype << 8) + tlv_header->type),
 359                tlv_header->type,
 360                tlv_len);
 361
 362         if ((tlv_len < sizeof(struct tlv_header_t) ||
 363             tlv_len > tlen) &&
 364             tlv_header->type != LACP_TLV_TERMINATOR &&
 365             tlv_header->type != MARKER_TLV_TERMINATOR) {
 366             printf("\n\t-----trailing data-----");
 367             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",tlen);
 368             return;
 369         }
 370
 371         tlv_tptr=tptr+sizeof(struct tlv_header_t);
 372         tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
 373
 374         /* did we capture enough for fully decoding the tlv ? */
 375         TCHECK2(*tptr, tlv_len);
 376
 377         switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
 378
 379             /* those two TLVs have the same structure -> fall through */
 380         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
 381         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
 382             tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
 383
 384             printf("\n\t  System %s, System Priority %u, Key %u" \
 385                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 386                    etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
 387                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
 388                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
 389                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
 390                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
 391                    bittok2str(lacp_tlv_actor_partner_info_state_values,
 392                               "none",
 393                               tlv_ptr.lacp_tlv_actor_partner_info->state));
 394
 395             break;
 396
 397         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
 398             tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
 399
 400             printf("\n\t  Max Delay %u",
 401                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
 402
 403             break;
 404
 405         case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
 406             tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
 407
 408             printf("\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 409                    etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
 410                    EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
 411                    EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id));
 412
 413             break;
 414
 415             /* those two TLVs have the same structure -> fall through */
 416         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
 417         case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
 418             tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
 419             if (tlv_len == 0) {
 420                 tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
 421                     sizeof(struct tlv_header_t);
 422                 /* tell the user that we modified the length field  */
 423                 if (vflag>1)
 424                     printf(" (=%u)",tlv_len);
 425                 /* we have messed around with the length field - now we need to check
 426                  * again if there are enough bytes on the wire for the hexdump */
 427                 TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
 428                         sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
 429             }
 430
 431             break;
 432
 433         default:
 434             if (vflag <= 1)
 435                 print_unknown_data(tlv_tptr,"\n\t  ",tlv_tlen);
 436             break;
 437         }
 438         /* do we want to see an additional hexdump ? */
 439         if (vflag > 1) {
 440             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",
 441                                tlv_len-sizeof(struct tlv_header_t));
 442         }
 443
 444         tptr+=tlv_len;
 445         tlen-=tlv_len;
 446     }
 447     return;
 448 trunc:
 449     printf("\n\t\t packet exceeded snapshot");
 450 }
 451
 452 void slow_oam_print(register const u_char *tptr, register u_int tlen) {
 453
 454     u_int hexdump;
 455
 456     struct slow_oam_common_header_t {
 457         u_int8_t flags[2];
 458         u_int8_t code;
 459     };
 460
 461     struct slow_oam_tlv_header_t {
 462         u_int8_t type;
 463         u_int8_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     } tlv;
 477
 478     ptr.slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
 479     tptr += sizeof(struct slow_oam_common_header_t);
 480     tlen -= sizeof(struct slow_oam_common_header_t);
 481
 482     printf("\n\tCode %s OAM PDU, Flags [%s]",
 483            tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
 484            bittok2str(slow_oam_flag_values,
 485                       "none",
 486                       EXTRACT_16BITS(&ptr.slow_oam_common_header->flags)));
 487
 488     switch (ptr.slow_oam_common_header->code) {
 489     case SLOW_OAM_CODE_INFO:
 490         while (tlen > 0) {
 491             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 492             printf("\n\t  %s Information Type (%u), length %u",
 493                    tok2str(slow_oam_info_type_values, "Reserved",
 494                            ptr.slow_oam_tlv_header->type),
 495                    ptr.slow_oam_tlv_header->type,
 496                    ptr.slow_oam_tlv_header->length);
 497
 498             hexdump = FALSE;
 499             switch (ptr.slow_oam_tlv_header->type) {
 500             case SLOW_OAM_INFO_TYPE_END_OF_TLV:
 501                 if (ptr.slow_oam_tlv_header->length != 0) {
 502                     printf("\n\t    ERROR: illegal length - should be 0");
 503                 }
 504                 return;
 505
 506             case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
 507             case SLOW_OAM_INFO_TYPE_REMOTE:
 508                 tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
 509
 510                 if (tlv.slow_oam_info->info_length !=
 511                     sizeof(struct slow_oam_info_t)) {
 512                     printf("\n\t    ERROR: illegal length - should be %u",
 513                            sizeof(struct slow_oam_info_t));
 514                     return;
 515                 }
 516
 517                 printf("\n\t    OAM-Version %u, Revision %u",
 518                        tlv.slow_oam_info->oam_version,
 519                        EXTRACT_16BITS(&tlv.slow_oam_info->revision));
 520
 521                 printf("\n\t    State-MUX-Action %s, State-Parser-Action %s",
 522                        tok2str(slow_oam_info_type_state_parser_values, "Reserved",
 523                                tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
 524                        tok2str(slow_oam_info_type_state_mux_values, "Reserved",
 525                                tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK));
 526                 printf("\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
 527                        bittok2str(slow_oam_info_type_oam_config_values, "none",
 528                                   tlv.slow_oam_info->oam_config),
 529                        EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
 530                        OAM_INFO_TYPE_PDU_SIZE_MASK);
 531                 printf("\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
 532                        tok2str(oui_values, "Unknown",
 533                                EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
 534                        EXTRACT_24BITS(&tlv.slow_oam_info->oui),
 535                        EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private));
 536                 break;
 537
 538             case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
 539                 hexdump = TRUE;
 540                 break;
 541
 542             default:
 543                 hexdump = TRUE;
 544                 break;
 545             }
 546
 547             /* infinite loop check */
 548             if (!ptr.slow_oam_tlv_header->length) {
 549                 return;
 550             }
 551
 552             /* do we also want to see a hex dump ? */
 553             if (vflag > 1 || hexdump==TRUE) {
 554                 print_unknown_data(tptr,"\n\t  ",
 555                                    ptr.slow_oam_tlv_header->length);
 556             }
 557
 558             tlen -= ptr.slow_oam_tlv_header->length;
 559             tptr += ptr.slow_oam_tlv_header->length;
 560         }
 561         break;
 562
 563     case SLOW_OAM_CODE_EVENT_NOTIF:
 564         while (tlen > 0) {
 565             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 566             printf("\n\t  %s Link Event Type (%u), length %u",
 567                    tok2str(slow_oam_link_event_values, "Reserved",
 568                            ptr.slow_oam_tlv_header->type),
 569                    ptr.slow_oam_tlv_header->type,
 570                    ptr.slow_oam_tlv_header->length);
 571
 572             hexdump = FALSE;
 573             switch (ptr.slow_oam_tlv_header->type) {
 574             case SLOW_OAM_LINK_EVENT_END_OF_TLV:
 575                 if (ptr.slow_oam_tlv_header->length != 0) {
 576                     printf("\n\t    ERROR: illegal length - should be 0");
 577                 }
 578                 return;
 579
 580             case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
 581             case SLOW_OAM_LINK_EVENT_ERR_FRM:
 582             case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
 583             case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
 584                 tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
 585
 586                 if (tlv.slow_oam_link_event->event_length !=
 587                     sizeof(struct slow_oam_link_event_t)) {
 588                     printf("\n\t    ERROR: illegal length - should be %u",
 589                            sizeof(struct slow_oam_link_event_t));
 590                     return;
 591                 }
 592
 593                 printf("\n\t    Timestamp %u ms, Errored Window %" PRIu64
 594                        "\n\t    Errored Threshold %" PRIu64
 595                        "\n\t    Errors %" PRIu64
 596                        "\n\t    Error Running Total %" PRIu64
 597                        "\n\t    Event Running Total %u",
 598                        EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
 599                        EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
 600                        EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
 601                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
 602                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
 603                        EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total));
 604                 break;
 605
 606             case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
 607                 hexdump = TRUE;
 608                 break;
 609
 610             default:
 611                 hexdump = TRUE;
 612                 break;
 613             }
 614
 615             /* infinite loop check */
 616             if (!ptr.slow_oam_tlv_header->length) {
 617                 return;
 618             }
 619
 620             /* do we also want to see a hex dump ? */
 621             if (vflag > 1 || hexdump==TRUE) {
 622                 print_unknown_data(tptr,"\n\t  ",
 623                                    ptr.slow_oam_tlv_header->length);
 624             }
 625
 626             tlen -= ptr.slow_oam_tlv_header->length;
 627             tptr += ptr.slow_oam_tlv_header->length;
 628         }
 629         break;
 630
 631         /*
 632          * FIXME those are the defined codes that lack a decoder
 633          * you are welcome to contribute code ;-)
 634          */
 635     case SLOW_OAM_CODE_VAR_REQUEST:
 636     case SLOW_OAM_CODE_VAR_RESPONSE:
 637     case SLOW_OAM_CODE_LOOPBACK_CTRL:
 638     case SLOW_OAM_CODE_PRIVATE:
 639     default:
 640         if (vflag <= 1) {
 641             print_unknown_data(tptr,"\n\t  ", tlen);
 642         }
 643         break;
 644     }
 645     return;
 646 }