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 1.2 2006-02-16 16:42:44 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
  41 struct slow_common_header_t {
  42     u_int8_t proto_subtype;
  43     u_int8_t version;
  44 };
  45
  46 #define SLOW_PROTO_LACP                     1
  47 #define SLOW_PROTO_MARKER                   2
  48 #define SLOW_PROTO_OAM                      3
  49
  50 #define LACP_VERSION                        1
  51 #define MARKER_VERSION                      1
  52
  53 static const struct tok slow_proto_values[] = {
  54     { SLOW_PROTO_LACP, "LACP" },
  55     { SLOW_PROTO_MARKER, "MARKER" },
  56     { SLOW_PROTO_OAM, "OAM" },
  57     { 0, NULL}
  58 };
  59
  60 static const struct tok slow_oam_flag_values[] = {
  61     { 0x0001, "Link Fault" },
  62     { 0x0002, "Dying Gasp" },
  63     { 0x0004, "Critical Event" },
  64     { 0x0008, "Local Evaluating" },
  65     { 0x0010, "Local Stable" },
  66     { 0x0020, "Remote Evaluating" },
  67     { 0x0040, "Remote Stable" },
  68     { 0, NULL}
  69 };
  70
  71 #define SLOW_OAM_CODE_INFO          0x00
  72 #define SLOW_OAM_CODE_EVENT_NOTIF   0x01
  73 #define SLOW_OAM_CODE_VAR_REQUEST   0x02
  74 #define SLOW_OAM_CODE_VAR_RESPONSE  0x03
  75 #define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
  76 #define SLOW_OAM_CODE_PRIVATE       0xfe
  77
  78 static const struct tok slow_oam_code_values[] = {
  79     { SLOW_OAM_CODE_INFO, "Information" },
  80     { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
  81     { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
  82     { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
  83     { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
  84     { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
  85     { 0, NULL}
  86 };
  87
  88 struct tlv_header_t {
  89     u_int8_t type;
  90     u_int8_t length;
  91 };
  92
  93 #define LACP_TLV_TERMINATOR     0x00
  94 #define LACP_TLV_ACTOR_INFO     0x01
  95 #define LACP_TLV_PARTNER_INFO   0x02
  96 #define LACP_TLV_COLLECTOR_INFO 0x03
  97
  98 #define MARKER_TLV_TERMINATOR   0x00
  99 #define MARKER_TLV_MARKER_INFO  0x01
 100
 101 static const struct tok slow_tlv_values[] = {
 102     { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
 103     { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
 104     { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
 105     { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
 106
 107     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
 108     { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
 109     { 0, NULL}
 110 };
 111
 112 struct lacp_tlv_actor_partner_info_t {
 113     u_int8_t sys_pri[2];
 114     u_int8_t sys[ETHER_ADDR_LEN];
 115     u_int8_t key[2];
 116     u_int8_t port_pri[2];
 117     u_int8_t port[2];
 118     u_int8_t state;
 119     u_int8_t pad[3];
 120 };
 121
 122 static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
 123     { 0x01, "Activity"},
 124     { 0x02, "Timeout"},
 125     { 0x04, "Aggregation"},
 126     { 0x08, "Synchronization"},
 127     { 0x10, "Collecting"},
 128     { 0x20, "Distributing"},
 129     { 0x40, "Default"},
 130     { 0x80, "Expired"},
 131     { 0, NULL}
 132 };
 133
 134 struct lacp_tlv_collector_info_t {
 135     u_int8_t max_delay[2];
 136     u_int8_t pad[12];
 137 };
 138
 139 struct marker_tlv_marker_info_t {
 140     u_int8_t req_port[2];
 141     u_int8_t req_sys[ETHER_ADDR_LEN];
 142     u_int8_t req_trans_id[4];
 143     u_int8_t pad[2];
 144 };
 145
 146 struct lacp_marker_tlv_terminator_t {
 147     u_int8_t pad[50];
 148 };
 149
 150 void slow_marker_lacp_print(register const u_char *, register u_int);
 151 void slow_oam_print(register const u_char *, register u_int);
 152
 153 const struct slow_common_header_t *slow_com_header;
 154
 155 void
 156 slow_print(register const u_char *pptr, register u_int len) {
 157
 158     int print_version;
 159
 160     slow_com_header = (const struct slow_common_header_t *)pptr;
 161     TCHECK(*slow_com_header);
 162
 163     /*
 164      * Sanity checking of the header.
 165      */
 166     switch (slow_com_header->proto_subtype) {
 167     case SLOW_PROTO_LACP:
 168         if (slow_com_header->version != LACP_VERSION) {
 169             printf("LACP version %u packet not supported",slow_com_header->version);
 170             return;
 171         }
 172         print_version = 1;
 173         break;
 174
 175     case SLOW_PROTO_MARKER:
 176         if (slow_com_header->version != MARKER_VERSION) {
 177             printf("MARKER version %u packet not supported",slow_com_header->version);
 178             return;
 179         }
 180         print_version = 1;
 181         break;
 182
 183     case SLOW_PROTO_OAM: /* fall through */
 184         print_version = 0;
 185         break;
 186
 187     default:
 188         /* print basic information and exit */
 189         print_version = -1;
 190         break;
 191     }
 192
 193     if (print_version) {
 194         printf("%sv%u, length %u",
 195                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 196                slow_com_header->version,
 197                len);
 198     } else {
 199         /* some slow protos don't have a version number in the header */
 200         printf("%s, length %u",
 201                tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
 202                len);
 203     }
 204
 205     /* unrecognized subtype */
 206     if (print_version == -1) {
 207         print_unknown_data(pptr, "\n\t", len);
 208         return;
 209     }
 210
 211     if (!vflag)
 212         return;
 213
 214     switch (slow_com_header->proto_subtype) {
 215     default: /* should not happen */
 216         break;
 217
 218     case SLOW_PROTO_OAM:
 219         /* skip proto_subtype */
 220         slow_oam_print(pptr+1, len-1);
 221         break;
 222
 223     case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
 224     case SLOW_PROTO_MARKER:
 225         /* skip slow_common_header */
 226         len -= sizeof(const struct slow_common_header_t);
 227         pptr += sizeof(const struct slow_common_header_t);
 228         slow_marker_lacp_print(pptr, len);
 229         break;
 230     }
 231     return;
 232
 233 trunc:
 234     printf("\n\t\t packet exceeded snapshot");
 235 }
 236
 237 void slow_marker_lacp_print(register const u_char *tptr, register u_int tlen) {
 238
 239     const struct tlv_header_t *tlv_header;
 240     const u_char *tlv_tptr;
 241     u_int tlv_len, tlv_tlen;
 242
 243     union {
 244         const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
 245         const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
 246         const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
 247         const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
 248     } tlv_ptr;
 249
 250     while(tlen>0) {
 251         /* did we capture enough for fully decoding the tlv header ? */
 252         TCHECK2(*tptr, sizeof(struct tlv_header_t));
 253         tlv_header = (const struct tlv_header_t *)tptr;
 254         tlv_len = tlv_header->length;
 255
 256         printf("\n\t%s TLV (0x%02x), length %u",
 257                tok2str(slow_tlv_values,
 258                        "Unknown",
 259                        (slow_com_header->proto_subtype << 8) + tlv_header->type),
 260                tlv_header->type,
 261                tlv_len);
 262
 263         if ((tlv_len < sizeof(struct tlv_header_t) ||
 264             tlv_len > tlen) &&
 265             tlv_header->type != LACP_TLV_TERMINATOR &&
 266             tlv_header->type != MARKER_TLV_TERMINATOR) {
 267             printf("\n\t-----trailing data-----");
 268             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",tlen);
 269             return;
 270         }
 271
 272         tlv_tptr=tptr+sizeof(struct tlv_header_t);
 273         tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
 274
 275         /* did we capture enough for fully decoding the tlv ? */
 276         TCHECK2(*tptr, tlv_len);
 277
 278         switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
 279
 280             /* those two TLVs have the same structure -> fall through */
 281         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
 282         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
 283             tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
 284
 285             printf("\n\t  System %s, System Priority %u, Key %u" \
 286                    ", Port %u, Port Priority %u\n\t  State Flags [%s]",
 287                    etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
 288                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
 289                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
 290                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
 291                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
 292                    bittok2str(lacp_tlv_actor_partner_info_state_values,
 293                               "none",
 294                               tlv_ptr.lacp_tlv_actor_partner_info->state));
 295
 296             break;
 297
 298         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
 299             tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
 300
 301             printf("\n\t  Max Delay %u",
 302                    EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
 303
 304             break;
 305
 306         case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
 307             tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
 308
 309             printf("\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
 310                    etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
 311                    EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
 312                    EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id));
 313
 314             break;
 315
 316             /* those two TLVs have the same structure -> fall through */
 317         case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
 318         case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
 319             tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
 320             if (tlv_len == 0) {
 321                 tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
 322                     sizeof(struct tlv_header_t);
 323                 /* tell the user that we modified the length field  */
 324                 if (vflag>1)
 325                     printf(" (=%u)",tlv_len);
 326                 /* we have messed around with the length field - now we need to check
 327                  * again if there are enough bytes on the wire for the hexdump */
 328                 TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
 329                         sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
 330             }
 331
 332             break;
 333
 334         default:
 335             if (vflag <= 1)
 336                 print_unknown_data(tlv_tptr,"\n\t  ",tlv_tlen);
 337             break;
 338         }
 339         /* do we want to see an additional hexdump ? */
 340         if (vflag > 1) {
 341             print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",
 342                                tlv_len-sizeof(struct tlv_header_t));
 343         }
 344
 345         tptr+=tlv_len;
 346         tlen-=tlv_len;
 347     }
 348     return;
 349 trunc:
 350     printf("\n\t\t packet exceeded snapshot");
 351 }
 352
 353 void slow_oam_print(register const u_char *tptr, register u_int tlen) {
 354
 355     struct slow_oam_common_header_t {
 356         u_int8_t flags[2];
 357         u_int8_t code;
 358     };
 359     const struct slow_oam_common_header_t *slow_oam_common_header;
 360
 361     slow_oam_common_header = (struct slow_oam_common_header_t *)tptr;
 362
 363     printf("Flags [ %s ], Code %s",
 364            bittok2str(slow_oam_flag_values,
 365                       "none",
 366                       EXTRACT_16BITS(&slow_oam_common_header->flags)),
 367            tok2str(slow_oam_code_values, "Unknown (%u)", slow_oam_common_header->code));
 368
 369     switch (slow_oam_common_header->code) {
 370         /* FIXME no codes yet known - just hexdump for now */
 371     case SLOW_OAM_CODE_INFO:
 372     case SLOW_OAM_CODE_EVENT_NOTIF:
 373     case SLOW_OAM_CODE_VAR_REQUEST:
 374     case SLOW_OAM_CODE_VAR_RESPONSE:
 375     case SLOW_OAM_CODE_LOOPBACK_CTRL:
 376     case SLOW_OAM_CODE_PRIVATE:
 377     default:
 378         if (vflag <= 1) {
 379             print_unknown_data(tptr,"\n\t  ", tlen);
 380         }
 381         break;
 382     }
 383     /* do we want to see an additional hexdump ? */
 384     if (vflag > 1) {
 385         print_unknown_data(tptr,"\n\t  ", tlen);
 386     }
 387
 388     return;
 389 }