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 /* \summary: IEEE "slow protocols" (802.3ad/802.3ah) printer */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <netdissect-stdinc.h>
  28
  29 #include "netdissect.h"
  30 #include "extract.h"
  31 #include "addrtoname.h"
  32 #include "ether.h"
  33 #include "oui.h"
  34
  35 struct slow_common_header_t {
  36     uint8_t proto_subtype;
  37     uint8_t version;
  38 };
  39
  40 #define SLOW_PROTO_LACP                     1
  41 #define SLOW_PROTO_MARKER                   2
  42 #define SLOW_PROTO_OAM                      3
  43
  44 #define LACP_VERSION                        1
  45 #define MARKER_VERSION                      1
  46
  47 static const struct tok slow_proto_values[] = {
  48     { SLOW_PROTO_LACP, "LACP" },
  49     { SLOW_PROTO_MARKER, "MARKER" },
  50     { SLOW_PROTO_OAM, "OAM" },
  51     { 0, NULL}
  52 };
  53
  54 static const struct tok slow_oam_flag_values[] = {
  55     { 0x0001, "Link Fault" },
  56     { 0x0002, "Dying Gasp" },
  57     { 0x0004, "Critical Event" },
  58     { 0x0008, "Local Evaluating" },
  59     { 0x0010, "Local Stable" },
  60     { 0x0020, "Remote Evaluating" },
  61     { 0x0040, "Remote Stable" },
  62     { 0, NULL}
  63 };
  64
  65 #define SLOW_OAM_CODE_INFO          0x00
  66 #define SLOW_OAM_CODE_EVENT_NOTIF   0x01
  67 #define SLOW_OAM_CODE_VAR_REQUEST   0x02
  68 #define SLOW_OAM_CODE_VAR_RESPONSE  0x03
  69 #define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
  70 #define SLOW_OAM_CODE_PRIVATE       0xfe
  71
  72 static const struct tok slow_oam_code_values[] = {
  73     { SLOW_OAM_CODE_INFO, "Information" },
  74     { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
  75     { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
  76     { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
  77     { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
  78     { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
  79     { 0, NULL}
  80 };
  81
  82 struct slow_oam_info_t {
  83     uint8_t info_type;
  84     uint8_t info_length;
  85     uint8_t oam_version;
  86     uint8_t revision[2];
  87     uint8_t state;
  88     uint8_t oam_config;
  89     uint8_t oam_pdu_config[2];
  90     uint8_t oui[3];
  91     uint8_t vendor_private[4];
  92 };
  93
  94 #define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
  95 #define SLOW_OAM_INFO_TYPE_LOCAL 0x01
  96 #define SLOW_OAM_INFO_TYPE_REMOTE 0x02
  97 #define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe
  98
  99 static const struct tok slow_oam_info_type_values[] = {
 100     { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
 101     { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
 102     { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
 103     { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
 104     { 0, NULL}
 105 };
 106
 107 #define OAM_INFO_TYPE_PARSER_MASK 0x3
 108 static const struct tok slow_oam_info_type_state_parser_values[] = {
 109     { 0x00, "forwarding" },
 110     { 0x01, "looping back" },
 111     { 0x02, "discarding" },
 112     { 0x03, "reserved" },
 113     { 0, NULL}
 114 };
 115
 116 #define OAM_INFO_TYPE_MUX_MASK 0x4
 117 static const struct tok slow_oam_info_type_state_mux_values[] = {
 118     { 0x00, "forwarding" },
 119     { 0x04, "discarding" },
 120     { 0, NULL}
 121 };
 122
 123 static const struct tok slow_oam_info_type_oam_config_values[] = {
 124     { 0x01, "Active" },
 125     { 0x02, "Unidirectional" },
 126     { 0x04, "Remote-Loopback" },
 127     { 0x08, "Link-Events" },
 128     { 0x10, "Variable-Retrieval" },
 129     { 0, NULL}
 130 };
 131
 132 /* 11 Bits */
 133 #define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
 134
 135 #define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
 136 #define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
 137 #define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
 138 #define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
 139 #define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
 140 #define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe
 141
 142 static const struct tok slow_oam_link_event_values[] = {
 143     { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
 144     { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
 145     { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
 146     { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
 147     { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
 148     { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
 149     { 0, NULL}
 150 };
 151
 152 struct slow_oam_link_event_t {
 153     uint8_t event_type;
 154     uint8_t event_length;
 155     uint8_t time_stamp[2];
 156     uint8_t window[8];
 157     uint8_t threshold[8];
 158     uint8_t errors[8];
 159     uint8_t errors_running_total[8];
 160     uint8_t event_running_total[4];
 161 };
 162
 163 struct slow_oam_variablerequest_t {
 164     uint8_t branch;
 165     uint8_t leaf[2];
 166 };
 167
 168 struct slow_oam_variableresponse_t {
 169     uint8_t branch;
 170     uint8_t leaf[2];
 171     uint8_t length;
 172 };
 173
 174 struct slow_oam_loopbackctrl_t {
 175     uint8_t command;
 176 };
 177
 178 static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
 179     { 0x01, "Enable OAM Remote Loopback" },
 180     { 0x02, "Disable OAM Remote Loopback" },
 181     { 0, NULL}
 182 };
 183
 184 struct tlv_header_t {
 185     uint8_t type;
 186     uint8_t length;
 187 };
 188
 189 #define LACP_TLV_TERMINATOR     0x00
 190 #define LACP_TLV_ACTOR_INFO     0x01
 191 #define LACP_TLV_PARTNER_INFO   0x02
 192 #define LACP_TLV_COLLECTOR_INFO 0x03
 193
 194 #define MARKER_TLV_TERMINATOR   0x00
 195 #define MARKER_TLV_MARKER_INFO  0x01
 196
 197 static const struct tok slow_tlv_values[] = {
 198     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
 199     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
 200     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
 201     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
 202
 203     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
 204     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
 205     { 0, NULL}
 206 };
 207
 208 struct lacp_tlv_actor_partner_info_t {
 209     uint8_t sys_pri[2];
 210     uint8_t sys[ETHER_ADDR_LEN];
 211     uint8_t key[2];
 212     uint8_t port_pri[2];
 213     uint8_t port[2];
 214     uint8_t state;
 215     uint8_t pad[3];
 216 };
 217
 218 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
 219     { 0x01, "Activity"},
 220     { 0x02, "Timeout"},
 221     { 0x04, "Aggregation"},
 222     { 0x08, "Synchronization"},
 223     { 0x10, "Collecting"},
 224     { 0x20, "Distributing"},
 225     { 0x40, "Default"},
 226     { 0x80, "Expired"},
 227     { 0, NULL}
 228 };
 229
 230 struct lacp_tlv_collector_info_t {
 231     uint8_t max_delay[2];
 232     uint8_t pad[12];
 233 };
 234
 235 struct marker_tlv_marker_info_t {
 236     uint8_t req_port[2];
 237     uint8_t req_sys[ETHER_ADDR_LEN];
 238     uint8_t req_trans_id[4];
 239     uint8_t pad[2];
 240 };
 241
 242 struct lacp_marker_tlv_terminator_t {
 243     uint8_t pad[50];
 244 };
 245
 246 static void slow_marker_lacp_print(netdissect_options *, register const u_char *, register u_int);
 247 static void slow_oam_print(netdissect_options *, register const u_char *, register u_int);
 248
 249 const struct slow_common_header_t *slow_com_header;
 250
 251 void
 252 slow_print(netdissect_options *ndo,
 253            register const u_char *pptr, register u_int len)
 254 {
 255     int print_version;
 256
 257     slow_com_header = (const struct slow_common_header_t *)pptr;
 258     ND_TCHECK(*slow_com_header);
 259
 260     /*
 261      * Sanity checking of the header.
 262      */
 263     switch (slow_com_header->proto_subtype) {
 264     case SLOW_PROTO_LACP:
 265         if (slow_com_header->version != LACP_VERSION) {
 266             ND_PRINT((ndo, "LACP version %u packet not supported",slow_com_header->version));
 267             return;
 268         }
 269         print_version = 1;
 270         break;
 271
 272     case SLOW_PROTO_MARKER:
 273         if (slow_com_header->version != MARKER_VERSION) {
 274             ND_PRINT((ndo, "MARKER version %u packet not supported",slow_com_header->version));
 275             return;
 276         }
 277         print_version = 1;
 278         break;
 279
 280     case SLOW_PROTO_OAM: /* fall through */
 281         print_version = 0;
 282         break;
 283
 284     default:
 285         /* print basic information and exit */
 286         print_version = -1;
 287         break;
 288     }
 289
 290     if (print_version) {
 291         ND_PRINT((ndo, "%sv%u, length %u",
 292                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 293                slow_com_header->version,
 294                len));
 295     } else {
 296         /* some slow protos don't have a version number in the header */
 297         ND_PRINT((ndo, "%s, length %u",
 298                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 299                len));
 300     }
 301
 302     /* unrecognized subtype */
 303     if (print_version == -1) {
 304         print_unknown_data(ndo, pptr, "\n\t", len);
 305         return;
 306     }
 307
 308     if (!ndo->ndo_vflag)
 309         return;
 310
 311     switch (slow_com_header->proto_subtype) {
 312     default: /* should not happen */
 313         break;
 314
 315     case SLOW_PROTO_OAM:
 316         /* skip proto_subtype */
 317         slow_oam_print(ndo, pptr+1, len-1);
 318         break;
 319
 320     case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
 321     case SLOW_PROTO_MARKER:
 322         /* skip slow_common_header */
 323         len -= sizeof(const struct slow_common_header_t);
 324         pptr += sizeof(const struct slow_common_header_t);
 325         slow_marker_lacp_print(ndo, pptr, len);
 326         break;
 327     }
 328     return;
 329
 330 trunc:
 331     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 332 }
 333
 334 static void
 335 slow_marker_lacp_print(netdissect_options *ndo,
 336                        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         ND_TCHECK2(*tptr, sizeof(struct tlv_header_t));
 352         tlv_header = (const struct tlv_header_t *)tptr;
 353         tlv_len = tlv_header->length;
 354
 355         ND_PRINT((ndo, "\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             ND_PRINT((ndo, "\n\t-----trailing data-----"));
 367             print_unknown_data(ndo, tptr+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         ND_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             ND_PRINT((ndo, "\n\t  System %s, System Priority %u, Key %u" \
 385                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 386                    etheraddr_string(ndo, 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             ND_PRINT((ndo, "\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             ND_PRINT((ndo, "\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 409                    etheraddr_string(ndo, 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 (ndo->ndo_vflag>1)
 424                     ND_PRINT((ndo, " (=%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                 ND_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 (ndo->ndo_vflag <= 1)
 435                 print_unknown_data(ndo, tlv_tptr, "\n\t  ", tlv_tlen);
 436             break;
 437         }
 438         /* do we want to see an additional hexdump ? */
 439         if (ndo->ndo_vflag > 1) {
 440             print_unknown_data(ndo, tptr+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     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 450 }
 451
 452 static void
 453 slow_oam_print(netdissect_options *ndo,
 454                register const u_char *tptr, register u_int tlen)
 455 {
 456     u_int hexdump;
 457
 458     struct slow_oam_common_header_t {
 459         uint8_t flags[2];
 460         uint8_t code;
 461     };
 462
 463     struct slow_oam_tlv_header_t {
 464         uint8_t type;
 465         uint8_t length;
 466     };
 467
 468     union {
 469         const struct slow_oam_common_header_t *slow_oam_common_header;
 470         const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
 471     } ptr;
 472
 473     union {
 474         const struct slow_oam_info_t *slow_oam_info;
 475         const struct slow_oam_link_event_t *slow_oam_link_event;
 476         const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
 477         const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
 478         const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
 479     } tlv;
 480
 481     ptr.slow_oam_common_header = (const struct slow_oam_common_header_t *)tptr;
 482     tptr += sizeof(struct slow_oam_common_header_t);
 483     tlen -= sizeof(struct slow_oam_common_header_t);
 484
 485     ND_PRINT((ndo, "\n\tCode %s OAM PDU, Flags [%s]",
 486            tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
 487            bittok2str(slow_oam_flag_values,
 488                       "none",
 489                       EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));
 490
 491     switch (ptr.slow_oam_common_header->code) {
 492     case SLOW_OAM_CODE_INFO:
 493         while (tlen > 0) {
 494             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 495             ND_PRINT((ndo, "\n\t  %s Information Type (%u), length %u",
 496                    tok2str(slow_oam_info_type_values, "Reserved",
 497                            ptr.slow_oam_tlv_header->type),
 498                    ptr.slow_oam_tlv_header->type,
 499                    ptr.slow_oam_tlv_header->length));
 500
 501             hexdump = FALSE;
 502             switch (ptr.slow_oam_tlv_header->type) {
 503             case SLOW_OAM_INFO_TYPE_END_OF_TLV:
 504                 if (ptr.slow_oam_tlv_header->length != 0) {
 505                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be 0"));
 506                 }
 507                 return;
 508
 509             case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
 510             case SLOW_OAM_INFO_TYPE_REMOTE:
 511                 tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
 512
 513                 if (tlv.slow_oam_info->info_length !=
 514                     sizeof(struct slow_oam_info_t)) {
 515                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
 516                            (unsigned long) sizeof(struct slow_oam_info_t)));
 517                     return;
 518                 }
 519
 520                 ND_PRINT((ndo, "\n\t    OAM-Version %u, Revision %u",
 521                        tlv.slow_oam_info->oam_version,
 522                        EXTRACT_16BITS(&tlv.slow_oam_info->revision)));
 523
 524                 ND_PRINT((ndo, "\n\t    State-Parser-Action %s, State-MUX-Action %s",
 525                        tok2str(slow_oam_info_type_state_parser_values, "Reserved",
 526                                tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
 527                        tok2str(slow_oam_info_type_state_mux_values, "Reserved",
 528                                tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK)));
 529                 ND_PRINT((ndo, "\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
 530                        bittok2str(slow_oam_info_type_oam_config_values, "none",
 531                                   tlv.slow_oam_info->oam_config),
 532                        EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
 533                        OAM_INFO_TYPE_PDU_SIZE_MASK));
 534                 ND_PRINT((ndo, "\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
 535                        tok2str(oui_values, "Unknown",
 536                                EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
 537                        EXTRACT_24BITS(&tlv.slow_oam_info->oui),
 538                        EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private)));
 539                 break;
 540
 541             case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
 542                 hexdump = TRUE;
 543                 break;
 544
 545             default:
 546                 hexdump = TRUE;
 547                 break;
 548             }
 549
 550             /* infinite loop check */
 551             if (!ptr.slow_oam_tlv_header->length) {
 552                 return;
 553             }
 554
 555             /* do we also want to see a hex dump ? */
 556             if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
 557                 print_unknown_data(ndo, tptr, "\n\t  ",
 558                                    ptr.slow_oam_tlv_header->length);
 559             }
 560
 561             tlen -= ptr.slow_oam_tlv_header->length;
 562             tptr += ptr.slow_oam_tlv_header->length;
 563         }
 564         break;
 565
 566     case SLOW_OAM_CODE_EVENT_NOTIF:
 567         while (tlen > 0) {
 568             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 569             ND_PRINT((ndo, "\n\t  %s Link Event Type (%u), length %u",
 570                    tok2str(slow_oam_link_event_values, "Reserved",
 571                            ptr.slow_oam_tlv_header->type),
 572                    ptr.slow_oam_tlv_header->type,
 573                    ptr.slow_oam_tlv_header->length));
 574
 575             hexdump = FALSE;
 576             switch (ptr.slow_oam_tlv_header->type) {
 577             case SLOW_OAM_LINK_EVENT_END_OF_TLV:
 578                 if (ptr.slow_oam_tlv_header->length != 0) {
 579                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be 0"));
 580                 }
 581                 return;
 582
 583             case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
 584             case SLOW_OAM_LINK_EVENT_ERR_FRM:
 585             case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
 586             case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
 587                 tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
 588
 589                 if (tlv.slow_oam_link_event->event_length !=
 590                     sizeof(struct slow_oam_link_event_t)) {
 591                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
 592                            (unsigned long) sizeof(struct slow_oam_link_event_t)));
 593                     return;
 594                 }
 595
 596                 ND_PRINT((ndo, "\n\t    Timestamp %u ms, Errored Window %" PRIu64
 597                        "\n\t    Errored Threshold %" PRIu64
 598                        "\n\t    Errors %" PRIu64
 599                        "\n\t    Error Running Total %" PRIu64
 600                        "\n\t    Event Running Total %u",
 601                        EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
 602                        EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
 603                        EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
 604                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
 605                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
 606                        EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total)));
 607                 break;
 608
 609             case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
 610                 hexdump = TRUE;
 611                 break;
 612
 613             default:
 614                 hexdump = TRUE;
 615                 break;
 616             }
 617
 618             /* infinite loop check */
 619             if (!ptr.slow_oam_tlv_header->length) {
 620                 return;
 621             }
 622
 623             /* do we also want to see a hex dump ? */
 624             if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
 625                 print_unknown_data(ndo, tptr, "\n\t  ",
 626                                    ptr.slow_oam_tlv_header->length);
 627             }
 628
 629             tlen -= ptr.slow_oam_tlv_header->length;
 630             tptr += ptr.slow_oam_tlv_header->length;
 631         }
 632         break;
 633
 634     case SLOW_OAM_CODE_LOOPBACK_CTRL:
 635         tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
 636         ND_PRINT((ndo, "\n\t  Command %s (%u)",
 637                tok2str(slow_oam_loopbackctrl_cmd_values,
 638                        "Unknown",
 639                        tlv.slow_oam_loopbackctrl->command),
 640                tlv.slow_oam_loopbackctrl->command));
 641                tptr ++;
 642                tlen --;
 643         break;
 644
 645         /*
 646          * FIXME those are the defined codes that lack a decoder
 647          * you are welcome to contribute code ;-)
 648          */
 649     case SLOW_OAM_CODE_VAR_REQUEST:
 650     case SLOW_OAM_CODE_VAR_RESPONSE:
 651     case SLOW_OAM_CODE_PRIVATE:
 652     default:
 653         if (ndo->ndo_vflag <= 1) {
 654             print_unknown_data(ndo, tptr, "\n\t  ", tlen);
 655         }
 656         break;
 657     }
 658     return;
 659 }