contrib/tcpdump/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 1.8 2006-10-12 05:44:33 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[2];
  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 struct slow_oam_loopbackctrl_t {
 182     u_int8_t command;
 183 };
 184
 185 static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
 186     { 0x01, "Enable OAM Remote Loopback" },
 187     { 0x02, "Disable OAM Remote Loopback" },
 188     { 0, NULL}
 189 };
 190
 191 struct tlv_header_t {
 192     u_int8_t type;
 193     u_int8_t length;
 194 };
 195
 196 #define LACP_TLV_TERMINATOR     0x00
 197 #define LACP_TLV_ACTOR_INFO     0x01
 198 #define LACP_TLV_PARTNER_INFO   0x02
 199 #define LACP_TLV_COLLECTOR_INFO 0x03
 200
 201 #define MARKER_TLV_TERMINATOR   0x00
 202 #define MARKER_TLV_MARKER_INFO  0x01
 203
 204 static const struct tok slow_tlv_values[] = {
 205     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
 206     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
 207     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
 208     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
 209
 210     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
 211     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
 212     { 0, NULL}
 213 };
 214
 215 struct lacp_tlv_actor_partner_info_t {
 216     u_int8_t sys_pri[2];
 217     u_int8_t sys[ETHER_ADDR_LEN];
 218     u_int8_t key[2];
 219     u_int8_t port_pri[2];
 220     u_int8_t port[2];
 221     u_int8_t state;
 222     u_int8_t pad[3];
 223 };
 224
 225 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
 226     { 0x01, "Activity"},
 227     { 0x02, "Timeout"},
 228     { 0x04, "Aggregation"},
 229     { 0x08, "Synchronization"},
 230     { 0x10, "Collecting"},
 231     { 0x20, "Distributing"},
 232     { 0x40, "Default"},
 233     { 0x80, "Expired"},
 234     { 0, NULL}
 235 };
 236
 237 struct lacp_tlv_collector_info_t {
 238     u_int8_t max_delay[2];
 239     u_int8_t pad[12];
 240 };
 241
 242 struct marker_tlv_marker_info_t {
 243     u_int8_t req_port[2];
 244     u_int8_t req_sys[ETHER_ADDR_LEN];
 245     u_int8_t req_trans_id[4];
 246     u_int8_t pad[2];
 247 };
 248
 249 struct lacp_marker_tlv_terminator_t {
 250     u_int8_t pad[50];
 251 };
 252
 253 void slow_marker_lacp_print(register const u_char *, register u_int);
 254 void slow_oam_print(register const u_char *, register u_int);
 255
 256 const struct slow_common_header_t *slow_com_header;
 257
 258 void
 259 slow_print(register const u_char *pptr, register u_int len) {
 260
 261     int print_version;
 262
 263     slow_com_header = (const struct slow_common_header_t *)pptr;
 264     TCHECK(*slow_com_header);
 265
 266     /*
 267      * Sanity checking of the header.
 268      */
 269     switch (slow_com_header->proto_subtype) {
 270     case SLOW_PROTO_LACP:
 271         if (slow_com_header->version != LACP_VERSION) {
 272             printf("LACP version %u packet not supported",slow_com_header->version);
 273             return;
 274         }
 275         print_version = 1;
 276         break;
 277
 278     case SLOW_PROTO_MARKER:
 279         if (slow_com_header->version != MARKER_VERSION) {
 280             printf("MARKER version %u packet not supported",slow_com_header->version);
 281             return;
 282         }
 283         print_version = 1;
 284         break;
 285
 286     case SLOW_PROTO_OAM: /* fall through */
 287         print_version = 0;
 288         break;
 289
 290     default:
 291         /* print basic information and exit */
 292         print_version = -1;
 293         break;
 294     }
 295
 296     if (print_version) {
 297         printf("%sv%u, length %u",
 298                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 299                slow_com_header->version,
 300                len);
 301     } else {
 302         /* some slow protos don't have a version number in the header */
 303         printf("%s, length %u",
 304                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 305                len);
 306     }
 307
 308     /* unrecognized subtype */
 309     if (print_version == -1) {
 310         print_unknown_data(pptr, "\n\t", len);
 311         return;
 312     }
 313
 314     if (!vflag)
 315         return;
 316
 317     switch (slow_com_header->proto_subtype) {
 318     default: /* should not happen */
 319         break;
 320
 321     case SLOW_PROTO_OAM:
 322         /* skip proto_subtype */
 323         slow_oam_print(pptr+1, len-1);
 324         break;
 325
 326     case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
 327     case SLOW_PROTO_MARKER:
 328         /* skip slow_common_header */
 329         len -= sizeof(const struct slow_common_header_t);
 330         pptr += sizeof(const struct slow_common_header_t);
 331         slow_marker_lacp_print(pptr, len);
 332         break;
 333     }
 334     return;
 335
 336 trunc:
 337     printf("\n\t\t packet exceeded snapshot");
 338 }
 339
 340 void slow_marker_lacp_print(register const u_char *tptr, register u_int tlen) {
 341
 342     const struct tlv_header_t *tlv_header;
 343     const u_char *tlv_tptr;
 344     u_int tlv_len, tlv_tlen;
 345
 346     union {
 347         const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
 348         const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
 349         const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
 350         const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
 351     } tlv_ptr;
 352
 353     while(tlen>0) {
 354         /* did we capture enough for fully decoding the tlv header ? */
 355         TCHECK2(*tptr, sizeof(struct tlv_header_t));
 356         tlv_header = (const struct tlv_header_t *)tptr;
 357         tlv_len = tlv_header->length;
 358
 359         printf("\n\t%s TLV (0x%02x), length %u",
 360                tok2str(slow_tlv_values,
 361                        "Unknown",
 362                        (slow_com_header->proto_subtype << 8) + tlv_header->type),
 363                tlv_header->type,
 364                tlv_len);
 365
 366         if ((tlv_len < sizeof(struct tlv_header_t) ||
 367             tlv_len > tlen) &&
 368             tlv_header->type != LACP_TLV_TERMINATOR &&
 369             tlv_header->type != MARKER_TLV_TERMINATOR) {
 370             printf("\n\t-----trailing data-----");
 371             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",tlen);
 372             return;
 373         }
 374
 375         tlv_tptr=tptr+sizeof(struct tlv_header_t);
 376         tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
 377
 378         /* did we capture enough for fully decoding the tlv ? */
 379         TCHECK2(*tptr, tlv_len);
 380
 381         switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
 382
 383             /* those two TLVs have the same structure -> fall through */
 384         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
 385         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
 386             tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
 387
 388             printf("\n\t  System %s, System Priority %u, Key %u" \
 389                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 390                    etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
 391                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
 392                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
 393                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
 394                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
 395                    bittok2str(lacp_tlv_actor_partner_info_state_values,
 396                               "none",
 397                               tlv_ptr.lacp_tlv_actor_partner_info->state));
 398
 399             break;
 400
 401         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
 402             tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
 403
 404             printf("\n\t  Max Delay %u",
 405                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
 406
 407             break;
 408
 409         case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
 410             tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
 411
 412             printf("\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 413                    etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
 414                    EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
 415                    EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id));
 416
 417             break;
 418
 419             /* those two TLVs have the same structure -> fall through */
 420         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
 421         case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
 422             tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
 423             if (tlv_len == 0) {
 424                 tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
 425                     sizeof(struct tlv_header_t);
 426                 /* tell the user that we modified the length field  */
 427                 if (vflag>1)
 428                     printf(" (=%u)",tlv_len);
 429                 /* we have messed around with the length field - now we need to check
 430                  * again if there are enough bytes on the wire for the hexdump */
 431                 TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
 432                         sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
 433             }
 434
 435             break;
 436
 437         default:
 438             if (vflag <= 1)
 439                 print_unknown_data(tlv_tptr,"\n\t  ",tlv_tlen);
 440             break;
 441         }
 442         /* do we want to see an additional hexdump ? */
 443         if (vflag > 1) {
 444             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",
 445                                tlv_len-sizeof(struct tlv_header_t));
 446         }
 447
 448         tptr+=tlv_len;
 449         tlen-=tlv_len;
 450     }
 451     return;
 452 trunc:
 453     printf("\n\t\t packet exceeded snapshot");
 454 }
 455
 456 void slow_oam_print(register const u_char *tptr, register u_int tlen) {
 457
 458     u_int hexdump;
 459
 460     struct slow_oam_common_header_t {
 461         u_int8_t flags[2];
 462         u_int8_t code;
 463     };
 464
 465     struct slow_oam_tlv_header_t {
 466         u_int8_t type;
 467         u_int8_t length;
 468     };
 469
 470     union {
 471         const struct slow_oam_common_header_t *slow_oam_common_header;
 472         const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
 473     } ptr;
 474
 475     union {
 476         const struct slow_oam_info_t *slow_oam_info;
 477         const struct slow_oam_link_event_t *slow_oam_link_event;
 478         const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
 479         const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
 480         const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
 481     } tlv;
 482
 483     ptr.slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
 484     tptr += sizeof(struct slow_oam_common_header_t);
 485     tlen -= sizeof(struct slow_oam_common_header_t);
 486
 487     printf("\n\tCode %s OAM PDU, Flags [%s]",
 488            tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
 489            bittok2str(slow_oam_flag_values,
 490                       "none",
 491                       EXTRACT_16BITS(&ptr.slow_oam_common_header->flags)));
 492
 493     switch (ptr.slow_oam_common_header->code) {
 494     case SLOW_OAM_CODE_INFO:
 495         while (tlen > 0) {
 496             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 497             printf("\n\t  %s Information Type (%u), length %u",
 498                    tok2str(slow_oam_info_type_values, "Reserved",
 499                            ptr.slow_oam_tlv_header->type),
 500                    ptr.slow_oam_tlv_header->type,
 501                    ptr.slow_oam_tlv_header->length);
 502
 503             hexdump = FALSE;
 504             switch (ptr.slow_oam_tlv_header->type) {
 505             case SLOW_OAM_INFO_TYPE_END_OF_TLV:
 506                 if (ptr.slow_oam_tlv_header->length != 0) {
 507                     printf("\n\t    ERROR: illegal length - should be 0");
 508                 }
 509                 return;
 510
 511             case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
 512             case SLOW_OAM_INFO_TYPE_REMOTE:
 513                 tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
 514
 515                 if (tlv.slow_oam_info->info_length !=
 516                     sizeof(struct slow_oam_info_t)) {
 517                     printf("\n\t    ERROR: illegal length - should be %lu",
 518                            (unsigned long) sizeof(struct slow_oam_info_t));
 519                     return;
 520                 }
 521
 522                 printf("\n\t    OAM-Version %u, Revision %u",
 523                        tlv.slow_oam_info->oam_version,
 524                        EXTRACT_16BITS(&tlv.slow_oam_info->revision));
 525
 526                 printf("\n\t    State-Parser-Action %s, State-MUX-Action %s",
 527                        tok2str(slow_oam_info_type_state_parser_values, "Reserved",
 528                                tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
 529                        tok2str(slow_oam_info_type_state_mux_values, "Reserved",
 530                                tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK));
 531                 printf("\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
 532                        bittok2str(slow_oam_info_type_oam_config_values, "none",
 533                                   tlv.slow_oam_info->oam_config),
 534                        EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
 535                        OAM_INFO_TYPE_PDU_SIZE_MASK);
 536                 printf("\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
 537                        tok2str(oui_values, "Unknown",
 538                                EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
 539                        EXTRACT_24BITS(&tlv.slow_oam_info->oui),
 540                        EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private));
 541                 break;
 542
 543             case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
 544                 hexdump = TRUE;
 545                 break;
 546
 547             default:
 548                 hexdump = TRUE;
 549                 break;
 550             }
 551
 552             /* infinite loop check */
 553             if (!ptr.slow_oam_tlv_header->length) {
 554                 return;
 555             }
 556
 557             /* do we also want to see a hex dump ? */
 558             if (vflag > 1 || hexdump==TRUE) {
 559                 print_unknown_data(tptr,"\n\t  ",
 560                                    ptr.slow_oam_tlv_header->length);
 561             }
 562
 563             tlen -= ptr.slow_oam_tlv_header->length;
 564             tptr += ptr.slow_oam_tlv_header->length;
 565         }
 566         break;
 567
 568     case SLOW_OAM_CODE_EVENT_NOTIF:
 569         while (tlen > 0) {
 570             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 571             printf("\n\t  %s Link Event Type (%u), length %u",
 572                    tok2str(slow_oam_link_event_values, "Reserved",
 573                            ptr.slow_oam_tlv_header->type),
 574                    ptr.slow_oam_tlv_header->type,
 575                    ptr.slow_oam_tlv_header->length);
 576
 577             hexdump = FALSE;
 578             switch (ptr.slow_oam_tlv_header->type) {
 579             case SLOW_OAM_LINK_EVENT_END_OF_TLV:
 580                 if (ptr.slow_oam_tlv_header->length != 0) {
 581                     printf("\n\t    ERROR: illegal length - should be 0");
 582                 }
 583                 return;
 584
 585             case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
 586             case SLOW_OAM_LINK_EVENT_ERR_FRM:
 587             case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
 588             case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
 589                 tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
 590
 591                 if (tlv.slow_oam_link_event->event_length !=
 592                     sizeof(struct slow_oam_link_event_t)) {
 593                     printf("\n\t    ERROR: illegal length - should be %lu",
 594                            (unsigned long) sizeof(struct slow_oam_link_event_t));
 595                     return;
 596                 }
 597
 598                 printf("\n\t    Timestamp %u ms, Errored Window %" PRIu64
 599                        "\n\t    Errored Threshold %" PRIu64
 600                        "\n\t    Errors %" PRIu64
 601                        "\n\t    Error Running Total %" PRIu64
 602                        "\n\t    Event Running Total %u",
 603                        EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
 604                        EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
 605                        EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
 606                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
 607                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
 608                        EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total));
 609                 break;
 610
 611             case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
 612                 hexdump = TRUE;
 613                 break;
 614
 615             default:
 616                 hexdump = TRUE;
 617                 break;
 618             }
 619
 620             /* infinite loop check */
 621             if (!ptr.slow_oam_tlv_header->length) {
 622                 return;
 623             }
 624
 625             /* do we also want to see a hex dump ? */
 626             if (vflag > 1 || hexdump==TRUE) {
 627                 print_unknown_data(tptr,"\n\t  ",
 628                                    ptr.slow_oam_tlv_header->length);
 629             }
 630
 631             tlen -= ptr.slow_oam_tlv_header->length;
 632             tptr += ptr.slow_oam_tlv_header->length;
 633         }
 634         break;
 635
 636     case SLOW_OAM_CODE_LOOPBACK_CTRL:
 637         tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
 638         printf("\n\t  Command %s (%u)",
 639                tok2str(slow_oam_loopbackctrl_cmd_values,
 640                        "Unknown",
 641                        tlv.slow_oam_loopbackctrl->command),
 642                tlv.slow_oam_loopbackctrl->command);
 643                tptr ++;
 644                tlen --;
 645         break;
 646
 647         /*
 648          * FIXME those are the defined codes that lack a decoder
 649          * you are welcome to contribute code ;-)
 650          */
 651     case SLOW_OAM_CODE_VAR_REQUEST:
 652     case SLOW_OAM_CODE_VAR_RESPONSE:
 653     case SLOW_OAM_CODE_PRIVATE:
 654     default:
 655         if (vflag <= 1) {
 656             print_unknown_data(tptr,"\n\t  ", tlen);
 657         }
 658         break;
 659     }
 660     return;
 661 }