external/bsd/tcpdump/dist/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 #include <sys/cdefs.h>
  22 #ifndef lint
  23 __RCSID("$NetBSD: print-slow.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
  24 #endif
  25
  26 #define NETDISSECT_REWORKED
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <tcpdump-stdinc.h>
  32
  33 #include "interface.h"
  34 #include "extract.h"
  35 #include "addrtoname.h"
  36 #include "ether.h"
  37 #include "oui.h"
  38
  39 struct slow_common_header_t {
  40     uint8_t proto_subtype;
  41     uint8_t version;
  42 };
  43
  44 #define SLOW_PROTO_LACP                     1
  45 #define SLOW_PROTO_MARKER                   2
  46 #define SLOW_PROTO_OAM                      3
  47
  48 #define LACP_VERSION                        1
  49 #define MARKER_VERSION                      1
  50
  51 static const struct tok slow_proto_values[] = {
  52     { SLOW_PROTO_LACP, "LACP" },
  53     { SLOW_PROTO_MARKER, "MARKER" },
  54     { SLOW_PROTO_OAM, "OAM" },
  55     { 0, NULL}
  56 };
  57
  58 static const struct tok slow_oam_flag_values[] = {
  59     { 0x0001, "Link Fault" },
  60     { 0x0002, "Dying Gasp" },
  61     { 0x0004, "Critical Event" },
  62     { 0x0008, "Local Evaluating" },
  63     { 0x0010, "Local Stable" },
  64     { 0x0020, "Remote Evaluating" },
  65     { 0x0040, "Remote Stable" },
  66     { 0, NULL}
  67 };
  68
  69 #define SLOW_OAM_CODE_INFO          0x00
  70 #define SLOW_OAM_CODE_EVENT_NOTIF   0x01
  71 #define SLOW_OAM_CODE_VAR_REQUEST   0x02
  72 #define SLOW_OAM_CODE_VAR_RESPONSE  0x03
  73 #define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
  74 #define SLOW_OAM_CODE_PRIVATE       0xfe
  75
  76 static const struct tok slow_oam_code_values[] = {
  77     { SLOW_OAM_CODE_INFO, "Information" },
  78     { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
  79     { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
  80     { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
  81     { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
  82     { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
  83     { 0, NULL}
  84 };
  85
  86 struct slow_oam_info_t {
  87     uint8_t info_type;
  88     uint8_t info_length;
  89     uint8_t oam_version;
  90     uint8_t revision[2];
  91     uint8_t state;
  92     uint8_t oam_config;
  93     uint8_t oam_pdu_config[2];
  94     uint8_t oui[3];
  95     uint8_t vendor_private[4];
  96 };
  97
  98 #define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
  99 #define SLOW_OAM_INFO_TYPE_LOCAL 0x01
 100 #define SLOW_OAM_INFO_TYPE_REMOTE 0x02
 101 #define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe
 102
 103 static const struct tok slow_oam_info_type_values[] = {
 104     { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
 105     { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
 106     { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
 107     { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
 108     { 0, NULL}
 109 };
 110
 111 #define OAM_INFO_TYPE_PARSER_MASK 0x3
 112 static const struct tok slow_oam_info_type_state_parser_values[] = {
 113     { 0x00, "forwarding" },
 114     { 0x01, "looping back" },
 115     { 0x02, "discarding" },
 116     { 0x03, "reserved" },
 117     { 0, NULL}
 118 };
 119
 120 #define OAM_INFO_TYPE_MUX_MASK 0x4
 121 static const struct tok slow_oam_info_type_state_mux_values[] = {
 122     { 0x00, "forwarding" },
 123     { 0x04, "discarding" },
 124     { 0, NULL}
 125 };
 126
 127 static const struct tok slow_oam_info_type_oam_config_values[] = {
 128     { 0x01, "Active" },
 129     { 0x02, "Unidirectional" },
 130     { 0x04, "Remote-Loopback" },
 131     { 0x08, "Link-Events" },
 132     { 0x10, "Variable-Retrieval" },
 133     { 0, NULL}
 134 };
 135
 136 /* 11 Bits */
 137 #define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff
 138
 139 #define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
 140 #define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
 141 #define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
 142 #define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
 143 #define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
 144 #define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe
 145
 146 static const struct tok slow_oam_link_event_values[] = {
 147     { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
 148     { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
 149     { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
 150     { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
 151     { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
 152     { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
 153     { 0, NULL}
 154 };
 155
 156 struct slow_oam_link_event_t {
 157     uint8_t event_type;
 158     uint8_t event_length;
 159     uint8_t time_stamp[2];
 160     uint8_t window[8];
 161     uint8_t threshold[8];
 162     uint8_t errors[8];
 163     uint8_t errors_running_total[8];
 164     uint8_t event_running_total[4];
 165 };
 166
 167 struct slow_oam_variablerequest_t {
 168     uint8_t branch;
 169     uint8_t leaf[2];
 170 };
 171
 172 struct slow_oam_variableresponse_t {
 173     uint8_t branch;
 174     uint8_t leaf[2];
 175     uint8_t length;
 176 };
 177
 178 struct slow_oam_loopbackctrl_t {
 179     uint8_t command;
 180 };
 181
 182 static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
 183     { 0x01, "Enable OAM Remote Loopback" },
 184     { 0x02, "Disable OAM Remote Loopback" },
 185     { 0, NULL}
 186 };
 187
 188 struct tlv_header_t {
 189     uint8_t type;
 190     uint8_t length;
 191 };
 192
 193 #define LACP_TLV_TERMINATOR     0x00
 194 #define LACP_TLV_ACTOR_INFO     0x01
 195 #define LACP_TLV_PARTNER_INFO   0x02
 196 #define LACP_TLV_COLLECTOR_INFO 0x03
 197
 198 #define MARKER_TLV_TERMINATOR   0x00
 199 #define MARKER_TLV_MARKER_INFO  0x01
 200
 201 static const struct tok slow_tlv_values[] = {
 202     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
 203     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
 204     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
 205     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
 206
 207     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
 208     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
 209     { 0, NULL}
 210 };
 211
 212 struct lacp_tlv_actor_partner_info_t {
 213     uint8_t sys_pri[2];
 214     uint8_t sys[ETHER_ADDR_LEN];
 215     uint8_t key[2];
 216     uint8_t port_pri[2];
 217     uint8_t port[2];
 218     uint8_t state;
 219     uint8_t pad[3];
 220 };
 221
 222 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
 223     { 0x01, "Activity"},
 224     { 0x02, "Timeout"},
 225     { 0x04, "Aggregation"},
 226     { 0x08, "Synchronization"},
 227     { 0x10, "Collecting"},
 228     { 0x20, "Distributing"},
 229     { 0x40, "Default"},
 230     { 0x80, "Expired"},
 231     { 0, NULL}
 232 };
 233
 234 struct lacp_tlv_collector_info_t {
 235     uint8_t max_delay[2];
 236     uint8_t pad[12];
 237 };
 238
 239 struct marker_tlv_marker_info_t {
 240     uint8_t req_port[2];
 241     uint8_t req_sys[ETHER_ADDR_LEN];
 242     uint8_t req_trans_id[4];
 243     uint8_t pad[2];
 244 };
 245
 246 struct lacp_marker_tlv_terminator_t {
 247     uint8_t pad[50];
 248 };
 249
 250 static void slow_marker_lacp_print(netdissect_options *, register const u_char *, register u_int);
 251 static void slow_oam_print(netdissect_options *, register const u_char *, register u_int);
 252
 253 const struct slow_common_header_t *slow_com_header;
 254
 255 void
 256 slow_print(netdissect_options *ndo,
 257            register const u_char *pptr, register u_int len)
 258 {
 259     int print_version;
 260
 261     slow_com_header = (const struct slow_common_header_t *)pptr;
 262     ND_TCHECK(*slow_com_header);
 263
 264     /*
 265      * Sanity checking of the header.
 266      */
 267     switch (slow_com_header->proto_subtype) {
 268     case SLOW_PROTO_LACP:
 269         if (slow_com_header->version != LACP_VERSION) {
 270             ND_PRINT((ndo, "LACP version %u packet not supported",slow_com_header->version));
 271             return;
 272         }
 273         print_version = 1;
 274         break;
 275
 276     case SLOW_PROTO_MARKER:
 277         if (slow_com_header->version != MARKER_VERSION) {
 278             ND_PRINT((ndo, "MARKER version %u packet not supported",slow_com_header->version));
 279             return;
 280         }
 281         print_version = 1;
 282         break;
 283
 284     case SLOW_PROTO_OAM: /* fall through */
 285         print_version = 0;
 286         break;
 287
 288     default:
 289         /* print basic information and exit */
 290         print_version = -1;
 291         break;
 292     }
 293
 294     if (print_version) {
 295         ND_PRINT((ndo, "%sv%u, length %u",
 296                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 297                slow_com_header->version,
 298                len));
 299     } else {
 300         /* some slow protos don't have a version number in the header */
 301         ND_PRINT((ndo, "%s, length %u",
 302                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 303                len));
 304     }
 305
 306     /* unrecognized subtype */
 307     if (print_version == -1) {
 308         print_unknown_data(ndo, pptr, "\n\t", len);
 309         return;
 310     }
 311
 312     if (!ndo->ndo_vflag)
 313         return;
 314
 315     switch (slow_com_header->proto_subtype) {
 316     default: /* should not happen */
 317         break;
 318
 319     case SLOW_PROTO_OAM:
 320         /* skip proto_subtype */
 321         slow_oam_print(ndo, pptr+1, len-1);
 322         break;
 323
 324     case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
 325     case SLOW_PROTO_MARKER:
 326         /* skip slow_common_header */
 327         len -= sizeof(const struct slow_common_header_t);
 328         pptr += sizeof(const struct slow_common_header_t);
 329         slow_marker_lacp_print(ndo, pptr, len);
 330         break;
 331     }
 332     return;
 333
 334 trunc:
 335     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 336 }
 337
 338 static void
 339 slow_marker_lacp_print(netdissect_options *ndo,
 340                        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         ND_TCHECK2(*tptr, sizeof(struct tlv_header_t));
 356         tlv_header = (const struct tlv_header_t *)tptr;
 357         tlv_len = tlv_header->length;
 358
 359         ND_PRINT((ndo, "\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             ND_PRINT((ndo, "\n\t-----trailing data-----"));
 371             print_unknown_data(ndo, tptr+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         ND_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             ND_PRINT((ndo, "\n\t  System %s, System Priority %u, Key %u" \
 389                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 390                    etheraddr_string(ndo, 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             ND_PRINT((ndo, "\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             ND_PRINT((ndo, "\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 413                    etheraddr_string(ndo, 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 (ndo->ndo_vflag>1)
 428                     ND_PRINT((ndo, " (=%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                 ND_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 (ndo->ndo_vflag <= 1)
 439                 print_unknown_data(ndo, tlv_tptr, "\n\t  ", tlv_tlen);
 440             break;
 441         }
 442         /* do we want to see an additional hexdump ? */
 443         if (ndo->ndo_vflag > 1) {
 444             print_unknown_data(ndo, tptr+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     ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
 454 }
 455
 456 static void
 457 slow_oam_print(netdissect_options *ndo,
 458                register const u_char *tptr, register u_int tlen)
 459 {
 460     u_int hexdump;
 461
 462     struct slow_oam_common_header_t {
 463         uint8_t flags[2];
 464         uint8_t code;
 465     };
 466
 467     struct slow_oam_tlv_header_t {
 468         uint8_t type;
 469         uint8_t length;
 470     };
 471
 472     union {
 473         const struct slow_oam_common_header_t *slow_oam_common_header;
 474         const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
 475     } ptr;
 476
 477     union {
 478         const struct slow_oam_info_t *slow_oam_info;
 479         const struct slow_oam_link_event_t *slow_oam_link_event;
 480         const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
 481         const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
 482         const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
 483     } tlv;
 484
 485     ptr.slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
 486     tptr += sizeof(struct slow_oam_common_header_t);
 487     tlen -= sizeof(struct slow_oam_common_header_t);
 488
 489     ND_PRINT((ndo, "\n\tCode %s OAM PDU, Flags [%s]",
 490            tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
 491            bittok2str(slow_oam_flag_values,
 492                       "none",
 493                       EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));
 494
 495     switch (ptr.slow_oam_common_header->code) {
 496     case SLOW_OAM_CODE_INFO:
 497         while (tlen > 0) {
 498             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 499             ND_PRINT((ndo, "\n\t  %s Information Type (%u), length %u",
 500                    tok2str(slow_oam_info_type_values, "Reserved",
 501                            ptr.slow_oam_tlv_header->type),
 502                    ptr.slow_oam_tlv_header->type,
 503                    ptr.slow_oam_tlv_header->length));
 504
 505             hexdump = FALSE;
 506             switch (ptr.slow_oam_tlv_header->type) {
 507             case SLOW_OAM_INFO_TYPE_END_OF_TLV:
 508                 if (ptr.slow_oam_tlv_header->length != 0) {
 509                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be 0"));
 510                 }
 511                 return;
 512
 513             case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
 514             case SLOW_OAM_INFO_TYPE_REMOTE:
 515                 tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;
 516
 517                 if (tlv.slow_oam_info->info_length !=
 518                     sizeof(struct slow_oam_info_t)) {
 519                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
 520                            (unsigned long) sizeof(struct slow_oam_info_t)));
 521                     return;
 522                 }
 523
 524                 ND_PRINT((ndo, "\n\t    OAM-Version %u, Revision %u",
 525                        tlv.slow_oam_info->oam_version,
 526                        EXTRACT_16BITS(&tlv.slow_oam_info->revision)));
 527
 528                 ND_PRINT((ndo, "\n\t    State-Parser-Action %s, State-MUX-Action %s",
 529                        tok2str(slow_oam_info_type_state_parser_values, "Reserved",
 530                                tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
 531                        tok2str(slow_oam_info_type_state_mux_values, "Reserved",
 532                                tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK)));
 533                 ND_PRINT((ndo, "\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
 534                        bittok2str(slow_oam_info_type_oam_config_values, "none",
 535                                   tlv.slow_oam_info->oam_config),
 536                        EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
 537                        OAM_INFO_TYPE_PDU_SIZE_MASK));
 538                 ND_PRINT((ndo, "\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
 539                        tok2str(oui_values, "Unknown",
 540                                EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
 541                        EXTRACT_24BITS(&tlv.slow_oam_info->oui),
 542                        EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private)));
 543                 break;
 544
 545             case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
 546                 hexdump = TRUE;
 547                 break;
 548
 549             default:
 550                 hexdump = TRUE;
 551                 break;
 552             }
 553
 554             /* infinite loop check */
 555             if (!ptr.slow_oam_tlv_header->length) {
 556                 return;
 557             }
 558
 559             /* do we also want to see a hex dump ? */
 560             if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
 561                 print_unknown_data(ndo, tptr, "\n\t  ",
 562                                    ptr.slow_oam_tlv_header->length);
 563             }
 564
 565             tlen -= ptr.slow_oam_tlv_header->length;
 566             tptr += ptr.slow_oam_tlv_header->length;
 567         }
 568         break;
 569
 570     case SLOW_OAM_CODE_EVENT_NOTIF:
 571         while (tlen > 0) {
 572             ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
 573             ND_PRINT((ndo, "\n\t  %s Link Event Type (%u), length %u",
 574                    tok2str(slow_oam_link_event_values, "Reserved",
 575                            ptr.slow_oam_tlv_header->type),
 576                    ptr.slow_oam_tlv_header->type,
 577                    ptr.slow_oam_tlv_header->length));
 578
 579             hexdump = FALSE;
 580             switch (ptr.slow_oam_tlv_header->type) {
 581             case SLOW_OAM_LINK_EVENT_END_OF_TLV:
 582                 if (ptr.slow_oam_tlv_header->length != 0) {
 583                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be 0"));
 584                 }
 585                 return;
 586
 587             case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
 588             case SLOW_OAM_LINK_EVENT_ERR_FRM:
 589             case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
 590             case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
 591                 tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;
 592
 593                 if (tlv.slow_oam_link_event->event_length !=
 594                     sizeof(struct slow_oam_link_event_t)) {
 595                     ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
 596                            (unsigned long) sizeof(struct slow_oam_link_event_t)));
 597                     return;
 598                 }
 599
 600                 ND_PRINT((ndo, "\n\t    Timestamp %u ms, Errored Window %" PRIu64
 601                        "\n\t    Errored Threshold %" PRIu64
 602                        "\n\t    Errors %" PRIu64
 603                        "\n\t    Error Running Total %" PRIu64
 604                        "\n\t    Event Running Total %u",
 605                        EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
 606                        EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
 607                        EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
 608                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
 609                        EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
 610                        EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total)));
 611                 break;
 612
 613             case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
 614                 hexdump = TRUE;
 615                 break;
 616
 617             default:
 618                 hexdump = TRUE;
 619                 break;
 620             }
 621
 622             /* infinite loop check */
 623             if (!ptr.slow_oam_tlv_header->length) {
 624                 return;
 625             }
 626
 627             /* do we also want to see a hex dump ? */
 628             if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
 629                 print_unknown_data(ndo, tptr, "\n\t  ",
 630                                    ptr.slow_oam_tlv_header->length);
 631             }
 632
 633             tlen -= ptr.slow_oam_tlv_header->length;
 634             tptr += ptr.slow_oam_tlv_header->length;
 635         }
 636         break;
 637
 638     case SLOW_OAM_CODE_LOOPBACK_CTRL:
 639         tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
 640         ND_PRINT((ndo, "\n\t  Command %s (%u)",
 641                tok2str(slow_oam_loopbackctrl_cmd_values,
 642                        "Unknown",
 643                        tlv.slow_oam_loopbackctrl->command),
 644                tlv.slow_oam_loopbackctrl->command));
 645                tptr ++;
 646                tlen --;
 647         break;
 648
 649         /*
 650          * FIXME those are the defined codes that lack a decoder
 651          * you are welcome to contribute code ;-)
 652          */
 653     case SLOW_OAM_CODE_VAR_REQUEST:
 654     case SLOW_OAM_CODE_VAR_RESPONSE:
 655     case SLOW_OAM_CODE_PRIVATE:
 656     default:
 657         if (ndo->ndo_vflag <= 1) {
 658             print_unknown_data(ndo, tptr, "\n\t  ", tlen);
 659         }
 660         break;
 661     }
 662     return;
 663 }