contrib/tcpdump-3.9/print-bgp.c

   1 /*
   2  * Copyright (C) 1999 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
  30  * complete BGP support.
  31  */
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #ifndef lint
  38 static const char rcsid[] _U_ =
  39      "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.91.2.12 2007/07/14 22:26:35 guy Exp $";
  40 #endif
  41
  42 #include <tcpdump-stdinc.h>
  43
  44 #include <stdio.h>
  45 #include <string.h>
  46
  47 #include "interface.h"
  48 #include "decode_prefix.h"
  49 #include "addrtoname.h"
  50 #include "extract.h"
  51 #include "bgp.h"
  52 #include "l2vpn.h"
  53 #include "af.h"
  54
  55 struct bgp {
  56         u_int8_t bgp_marker[16];
  57         u_int16_t bgp_len;
  58         u_int8_t bgp_type;
  59 };
  60 #define BGP_SIZE                19      /* unaligned */
  61
  62 #define BGP_OPEN                1
  63 #define BGP_UPDATE              2
  64 #define BGP_NOTIFICATION        3
  65 #define BGP_KEEPALIVE           4
  66 #define BGP_ROUTE_REFRESH       5
  67
  68 static struct tok bgp_msg_values[] = {
  69     { BGP_OPEN,                 "Open"},
  70     { BGP_UPDATE,               "Update"},
  71     { BGP_NOTIFICATION,         "Notification"},
  72     { BGP_KEEPALIVE,            "Keepalive"},
  73     { BGP_ROUTE_REFRESH,        "Route Refresh"},
  74     { 0, NULL}
  75 };
  76
  77 struct bgp_open {
  78         u_int8_t bgpo_marker[16];
  79         u_int16_t bgpo_len;
  80         u_int8_t bgpo_type;
  81         u_int8_t bgpo_version;
  82         u_int16_t bgpo_myas;
  83         u_int16_t bgpo_holdtime;
  84         u_int32_t bgpo_id;
  85         u_int8_t bgpo_optlen;
  86         /* options should follow */
  87 };
  88 #define BGP_OPEN_SIZE           29      /* unaligned */
  89
  90 struct bgp_opt {
  91         u_int8_t bgpopt_type;
  92         u_int8_t bgpopt_len;
  93         /* variable length */
  94 };
  95 #define BGP_OPT_SIZE            2       /* some compilers may pad to 4 bytes */
  96
  97 #define BGP_UPDATE_MINSIZE      23
  98
  99 struct bgp_notification {
 100         u_int8_t bgpn_marker[16];
 101         u_int16_t bgpn_len;
 102         u_int8_t bgpn_type;
 103         u_int8_t bgpn_major;
 104         u_int8_t bgpn_minor;
 105 };
 106 #define BGP_NOTIFICATION_SIZE           21      /* unaligned */
 107
 108 struct bgp_route_refresh {
 109     u_int8_t  bgp_marker[16];
 110     u_int16_t len;
 111     u_int8_t  type;
 112     u_int8_t  afi[2]; /* the compiler messes this structure up               */
 113     u_int8_t  res;    /* when doing misaligned sequences of int8 and int16   */
 114     u_int8_t  safi;   /* afi should be int16 - so we have to access it using */
 115 };                    /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh)      */
 116 #define BGP_ROUTE_REFRESH_SIZE          23
 117
 118 struct bgp_attr {
 119         u_int8_t bgpa_flags;
 120         u_int8_t bgpa_type;
 121         union {
 122                 u_int8_t len;
 123                 u_int16_t elen;
 124         } bgpa_len;
 125 #define bgp_attr_len(p) \
 126         (((p)->bgpa_flags & 0x10) ? \
 127                 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
 128 #define bgp_attr_off(p) \
 129         (((p)->bgpa_flags & 0x10) ? 4 : 3)
 130 };
 131
 132 #define BGPTYPE_ORIGIN                  1
 133 #define BGPTYPE_AS_PATH                 2
 134 #define BGPTYPE_NEXT_HOP                3
 135 #define BGPTYPE_MULTI_EXIT_DISC         4
 136 #define BGPTYPE_LOCAL_PREF              5
 137 #define BGPTYPE_ATOMIC_AGGREGATE        6
 138 #define BGPTYPE_AGGREGATOR              7
 139 #define BGPTYPE_COMMUNITIES             8       /* RFC1997 */
 140 #define BGPTYPE_ORIGINATOR_ID           9       /* RFC1998 */
 141 #define BGPTYPE_CLUSTER_LIST            10      /* RFC1998 */
 142 #define BGPTYPE_DPA                     11      /* draft-ietf-idr-bgp-dpa */
 143 #define BGPTYPE_ADVERTISERS             12      /* RFC1863 */
 144 #define BGPTYPE_RCID_PATH               13      /* RFC1863 */
 145 #define BGPTYPE_MP_REACH_NLRI           14      /* RFC2283 */
 146 #define BGPTYPE_MP_UNREACH_NLRI         15      /* RFC2283 */
 147 #define BGPTYPE_EXTD_COMMUNITIES        16      /* draft-ietf-idr-bgp-ext-communities */
 148 #define BGPTYPE_ATTR_SET               128      /* draft-marques-ppvpn-ibgp */
 149
 150 #define BGP_MP_NLRI_MINSIZE              3       /* End of RIB Marker detection */
 151
 152 static struct tok bgp_attr_values[] = {
 153     { BGPTYPE_ORIGIN,           "Origin"},
 154     { BGPTYPE_AS_PATH,          "AS Path"},
 155     { BGPTYPE_NEXT_HOP,         "Next Hop"},
 156     { BGPTYPE_MULTI_EXIT_DISC,  "Multi Exit Discriminator"},
 157     { BGPTYPE_LOCAL_PREF,       "Local Preference"},
 158     { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
 159     { BGPTYPE_AGGREGATOR,       "Aggregator"},
 160     { BGPTYPE_COMMUNITIES,      "Community"},
 161     { BGPTYPE_ORIGINATOR_ID,    "Originator ID"},
 162     { BGPTYPE_CLUSTER_LIST,     "Cluster List"},
 163     { BGPTYPE_DPA,              "DPA"},
 164     { BGPTYPE_ADVERTISERS,      "Advertisers"},
 165     { BGPTYPE_RCID_PATH,        "RCID Path / Cluster ID"},
 166     { BGPTYPE_MP_REACH_NLRI,    "Multi-Protocol Reach NLRI"},
 167     { BGPTYPE_MP_UNREACH_NLRI,  "Multi-Protocol Unreach NLRI"},
 168     { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
 169     { BGPTYPE_ATTR_SET,         "Attribute Set"},
 170     { 255,                      "Reserved for development"},
 171     { 0, NULL}
 172 };
 173
 174 #define BGP_AS_SET             1
 175 #define BGP_AS_SEQUENCE        2
 176 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
 177 #define BGP_CONFED_AS_SET      4 /* draft-ietf-idr-rfc3065bis-01  */
 178
 179 static struct tok bgp_as_path_segment_open_values[] = {
 180     { BGP_AS_SEQUENCE,         ""},
 181     { BGP_AS_SET,              "{ "},
 182     { BGP_CONFED_AS_SEQUENCE,  "( "},
 183     { BGP_CONFED_AS_SET,       "({ "},
 184     { 0, NULL}
 185 };
 186
 187 static struct tok bgp_as_path_segment_close_values[] = {
 188     { BGP_AS_SEQUENCE,         ""},
 189     { BGP_AS_SET,              "}"},
 190     { BGP_CONFED_AS_SEQUENCE,  ")"},
 191     { BGP_CONFED_AS_SET,       "})"},
 192     { 0, NULL}
 193 };
 194
 195 #define BGP_OPT_AUTH                    1
 196 #define BGP_OPT_CAP                     2
 197
 198
 199 static struct tok bgp_opt_values[] = {
 200     { BGP_OPT_AUTH,             "Authentication Information"},
 201     { BGP_OPT_CAP,              "Capabilities Advertisement"},
 202     { 0, NULL}
 203 };
 204
 205 #define BGP_CAPCODE_MP                  1
 206 #define BGP_CAPCODE_RR                  2
 207 #define BGP_CAPCODE_ORF                 3 /* XXX */
 208 #define BGP_CAPCODE_RESTART            64 /* draft-ietf-idr-restart-05  */
 209 #define BGP_CAPCODE_AS_NEW             65 /* XXX */
 210 #define BGP_CAPCODE_DYN_CAP            67 /* XXX */
 211 #define BGP_CAPCODE_RR_CISCO          128
 212
 213 static struct tok bgp_capcode_values[] = {
 214     { BGP_CAPCODE_MP,           "Multiprotocol Extensions"},
 215     { BGP_CAPCODE_RR,           "Route Refresh"},
 216     { BGP_CAPCODE_ORF,          "Cooperative Route Filtering"},
 217     { BGP_CAPCODE_RESTART,      "Graceful Restart"},
 218     { BGP_CAPCODE_AS_NEW,       "32-Bit AS Number"},
 219     { BGP_CAPCODE_DYN_CAP,      "Dynamic Capability"},
 220     { BGP_CAPCODE_RR_CISCO,     "Route Refresh (Cisco)"},
 221     { 0, NULL}
 222 };
 223
 224 #define BGP_NOTIFY_MAJOR_MSG            1
 225 #define BGP_NOTIFY_MAJOR_OPEN           2
 226 #define BGP_NOTIFY_MAJOR_UPDATE         3
 227 #define BGP_NOTIFY_MAJOR_HOLDTIME       4
 228 #define BGP_NOTIFY_MAJOR_FSM            5
 229 #define BGP_NOTIFY_MAJOR_CEASE          6
 230 #define BGP_NOTIFY_MAJOR_CAP            7
 231
 232 static struct tok bgp_notify_major_values[] = {
 233     { BGP_NOTIFY_MAJOR_MSG,     "Message Header Error"},
 234     { BGP_NOTIFY_MAJOR_OPEN,    "OPEN Message Error"},
 235     { BGP_NOTIFY_MAJOR_UPDATE,  "UPDATE Message Error"},
 236     { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
 237     { BGP_NOTIFY_MAJOR_FSM,     "Finite State Machine Error"},
 238     { BGP_NOTIFY_MAJOR_CEASE,   "Cease"},
 239     { BGP_NOTIFY_MAJOR_CAP,     "Capability Message Error"},
 240     { 0, NULL}
 241 };
 242
 243 /* draft-ietf-idr-cease-subcode-02 */
 244 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX  1
 245 static struct tok bgp_notify_minor_cease_values[] = {
 246     { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
 247     { 2,                        "Administratively Shutdown"},
 248     { 3,                        "Peer Unconfigured"},
 249     { 4,                        "Administratively Reset"},
 250     { 5,                        "Connection Rejected"},
 251     { 6,                        "Other Configuration Change"},
 252     { 7,                        "Connection Collision Resolution"},
 253     { 0, NULL}
 254 };
 255
 256 static struct tok bgp_notify_minor_msg_values[] = {
 257     { 1,                        "Connection Not Synchronized"},
 258     { 2,                        "Bad Message Length"},
 259     { 3,                        "Bad Message Type"},
 260     { 0, NULL}
 261 };
 262
 263 static struct tok bgp_notify_minor_open_values[] = {
 264     { 1,                        "Unsupported Version Number"},
 265     { 2,                        "Bad Peer AS"},
 266     { 3,                        "Bad BGP Identifier"},
 267     { 4,                        "Unsupported Optional Parameter"},
 268     { 5,                        "Authentication Failure"},
 269     { 6,                        "Unacceptable Hold Time"},
 270     { 0, NULL}
 271 };
 272
 273 static struct tok bgp_notify_minor_update_values[] = {
 274     { 1,                        "Malformed Attribute List"},
 275     { 2,                        "Unrecognized Well-known Attribute"},
 276     { 3,                        "Missing Well-known Attribute"},
 277     { 4,                        "Attribute Flags Error"},
 278     { 5,                        "Attribute Length Error"},
 279     { 6,                        "Invalid ORIGIN Attribute"},
 280     { 7,                        "AS Routing Loop"},
 281     { 8,                        "Invalid NEXT_HOP Attribute"},
 282     { 9,                        "Optional Attribute Error"},
 283     { 10,                       "Invalid Network Field"},
 284     { 11,                       "Malformed AS_PATH"},
 285     { 0, NULL}
 286 };
 287
 288 static struct tok bgp_notify_minor_cap_values[] = {
 289     { 1,                        "Invalid Action Value" },
 290     { 2,                        "Invalid Capability Length" },
 291     { 3,                        "Malformed Capability Value" },
 292     { 4,                        "Unsupported Capability Code" },
 293     { 0, NULL }
 294 };
 295
 296 static struct tok bgp_origin_values[] = {
 297     { 0,                        "IGP"},
 298     { 1,                        "EGP"},
 299     { 2,                        "Incomplete"},
 300     { 0, NULL}
 301 };
 302
 303 /* Subsequent address family identifier, RFC2283 section 7 */
 304 #define SAFNUM_RES                      0
 305 #define SAFNUM_UNICAST                  1
 306 #define SAFNUM_MULTICAST                2
 307 #define SAFNUM_UNIMULTICAST             3
 308 /* labeled BGP RFC3107 */
 309 #define SAFNUM_LABUNICAST               4
 310 #define SAFNUM_TUNNEL                   64 /* XXX */
 311 #define SAFNUM_VPLS                     65 /* XXX */
 312 #define SAFNUM_MDT                      66 /* XXX */
 313 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt  */
 314 #define SAFNUM_VPNUNICAST               128
 315 #define SAFNUM_VPNMULTICAST             129
 316 #define SAFNUM_VPNUNIMULTICAST          130
 317 /* draft-marques-ppvpn-rt-constrain-01.txt */
 318 #define SAFNUM_RT_ROUTING_INFO          132
 319
 320 #define BGP_VPN_RD_LEN                  8
 321
 322 static struct tok bgp_safi_values[] = {
 323     { SAFNUM_RES,               "Reserved"},
 324     { SAFNUM_UNICAST,           "Unicast"},
 325     { SAFNUM_MULTICAST,         "Multicast"},
 326     { SAFNUM_UNIMULTICAST,      "Unicast+Multicast"},
 327     { SAFNUM_LABUNICAST,        "labeled Unicast"},
 328     { SAFNUM_TUNNEL,            "Tunnel"},
 329     { SAFNUM_VPLS,              "VPLS"},
 330     { SAFNUM_MDT,               "MDT"},
 331     { SAFNUM_VPNUNICAST,        "labeled VPN Unicast"},
 332     { SAFNUM_VPNMULTICAST,      "labeled VPN Multicast"},
 333     { SAFNUM_VPNUNIMULTICAST,   "labeled VPN Unicast+Multicast"},
 334     { SAFNUM_RT_ROUTING_INFO,   "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
 335     { 0, NULL }
 336 };
 337
 338 /* well-known community */
 339 #define BGP_COMMUNITY_NO_EXPORT                 0xffffff01
 340 #define BGP_COMMUNITY_NO_ADVERT                 0xffffff02
 341 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED       0xffffff03
 342
 343 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
 344 #define BGP_EXT_COM_RT_0        0x0002  /* Route Target,Format AS(2bytes):AN(4bytes) */
 345 #define BGP_EXT_COM_RT_1        0x0102  /* Route Target,Format IP address:AN(2bytes) */
 346 #define BGP_EXT_COM_RT_2        0x0202  /* Route Target,Format AN(4bytes):local(2bytes) */
 347 #define BGP_EXT_COM_RO_0        0x0003  /* Route Origin,Format AS(2bytes):AN(4bytes) */
 348 #define BGP_EXT_COM_RO_1        0x0103  /* Route Origin,Format IP address:AN(2bytes) */
 349 #define BGP_EXT_COM_RO_2        0x0203  /* Route Origin,Format AN(4bytes):local(2bytes) */
 350 #define BGP_EXT_COM_LINKBAND    0x4004  /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
 351                                         /* rfc2547 bgp-mpls-vpns */
 352 #define BGP_EXT_COM_CISCO_MCAST 0x0009  /* cisco proprietary */
 353
 354 #define BGP_EXT_COM_VPN_ORIGIN  0x0005  /* OSPF Domain ID / VPN of Origin  - draft-rosen-vpns-ospf-bgp-mpls */
 355 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105  /* duplicate - keep for backwards compatability */
 356 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205  /* duplicate - keep for backwards compatability */
 357 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005  /* duplicate - keep for backwards compatability */
 358
 359 #define BGP_EXT_COM_OSPF_RTYPE  0x0306  /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
 360 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000  /* duplicate - keep for backwards compatability */
 361
 362 #define BGP_EXT_COM_OSPF_RID    0x0107  /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
 363 #define BGP_EXT_COM_OSPF_RID2   0x8001  /* duplicate - keep for backwards compatability */
 364
 365 #define BGP_EXT_COM_L2INFO      0x800a  /* draft-kompella-ppvpn-l2vpn */
 366
 367 /* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml  */
 368 #define BGP_EXT_COM_EIGRP_GEN   0x8800
 369 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY  0x8801
 370 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
 371 #define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU  0x8803
 372 #define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID  0x8804
 373 #define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
 374
 375 static struct tok bgp_extd_comm_flag_values[] = {
 376     { 0x8000,                  "vendor-specific"},
 377     { 0x4000,                  "non-transitive"},
 378     { 0, NULL},
 379 };
 380
 381 static struct tok bgp_extd_comm_subtype_values[] = {
 382     { BGP_EXT_COM_RT_0,        "target"},
 383     { BGP_EXT_COM_RT_1,        "target"},
 384     { BGP_EXT_COM_RT_2,        "target"},
 385     { BGP_EXT_COM_RO_0,        "origin"},
 386     { BGP_EXT_COM_RO_1,        "origin"},
 387     { BGP_EXT_COM_RO_2,        "origin"},
 388     { BGP_EXT_COM_LINKBAND,    "link-BW"},
 389     { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
 390     { BGP_EXT_COM_VPN_ORIGIN,  "ospf-domain"},
 391     { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
 392     { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
 393     { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
 394     { BGP_EXT_COM_OSPF_RTYPE,  "ospf-route-type"},
 395     { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
 396     { BGP_EXT_COM_OSPF_RID,    "ospf-router-id"},
 397     { BGP_EXT_COM_OSPF_RID2,   "ospf-router-id"},
 398     { BGP_EXT_COM_L2INFO,      "layer2-info"},
 399     { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
 400     { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
 401     { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
 402     { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
 403     { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
 404     { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
 405     { 0, NULL},
 406 };
 407
 408 /* OSPF codes for  BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls  */
 409 #define BGP_OSPF_RTYPE_RTR      1 /* OSPF Router LSA */
 410 #define BGP_OSPF_RTYPE_NET      2 /* OSPF Network LSA */
 411 #define BGP_OSPF_RTYPE_SUM      3 /* OSPF Summary LSA */
 412 #define BGP_OSPF_RTYPE_EXT      5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
 413 #define BGP_OSPF_RTYPE_NSSA     7 /* OSPF NSSA External*/
 414 #define BGP_OSPF_RTYPE_SHAM     129 /* OSPF-MPLS-VPN Sham link */
 415 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
 416
 417 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
 418   { BGP_OSPF_RTYPE_RTR, "Router" },
 419   { BGP_OSPF_RTYPE_NET, "Network" },
 420   { BGP_OSPF_RTYPE_SUM, "Summary" },
 421   { BGP_OSPF_RTYPE_EXT, "External" },
 422   { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
 423   { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
 424   { 0, NULL },
 425 };
 426
 427 int
 428 decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
 429 {
 430         struct in_addr addr;
 431         u_int plen;
 432
 433         TCHECK(pptr[0]);
 434         plen = pptr[0];
 435         if (32 < plen)
 436                 return -1;
 437
 438         memset(&addr, 0, sizeof(addr));
 439         TCHECK2(pptr[1], (plen + 7) / 8);
 440         memcpy(&addr, &pptr[1], (plen + 7) / 8);
 441         if (plen % 8) {
 442                 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
 443                         ((0xff00 >> (plen % 8)) & 0xff);
 444         }
 445         snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
 446         return 1 + (plen + 7) / 8;
 447
 448 trunc:
 449         return -2;
 450 }
 451
 452 static int
 453 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
 454 {
 455         struct in_addr addr;
 456         u_int plen;
 457
 458         TCHECK(pptr[0]);
 459         plen = pptr[0];   /* get prefix length */
 460
 461         /* this is one of the weirdnesses of rfc3107
 462            the label length (actually the label + COS bits)
 463            is added to the prefix length;
 464            we also do only read out just one label -
 465            there is no real application for advertisement of
 466            stacked labels in a a single BGP message
 467         */
 468
 469         if (24 > plen)
 470                 return -1;
 471
 472         plen-=24; /* adjust prefixlen - labellength */
 473
 474         if (32 < plen)
 475                 return -1;
 476
 477         memset(&addr, 0, sizeof(addr));
 478         TCHECK2(pptr[4], (plen + 7) / 8);
 479         memcpy(&addr, &pptr[4], (plen + 7) / 8);
 480         if (plen % 8) {
 481                 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
 482                         ((0xff00 >> (plen % 8)) & 0xff);
 483         }
 484         /* the label may get offsetted by 4 bits so lets shift it right */
 485         snprintf(buf, buflen, "%s/%d, label:%u %s",
 486                  getname((u_char *)&addr),
 487                  plen,
 488                  EXTRACT_24BITS(pptr+1)>>4,
 489                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 490
 491         return 4 + (plen + 7) / 8;
 492
 493 trunc:
 494         return -2;
 495 }
 496
 497 /* RDs and RTs share the same semantics
 498  * we use bgp_vpn_rd_print for
 499  * printing route targets inside a NLRI */
 500 char *
 501 bgp_vpn_rd_print (const u_char *pptr) {
 502
 503    /* allocate space for the largest possible string */
 504     static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
 505     char *pos = rd;
 506
 507     /* ok lets load the RD format */
 508     switch (EXTRACT_16BITS(pptr)) {
 509
 510         /* AS:IP-address fmt*/
 511     case 0:
 512         snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
 513             EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
 514         break;
 515         /* IP-address:AS fmt*/
 516
 517     case 1:
 518         snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
 519             *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
 520         break;
 521
 522         /* 4-byte-AS:number fmt*/
 523     case 2:
 524         snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
 525             EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
 526             *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
 527         break;
 528     default:
 529         snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
 530         break;
 531     }
 532     pos += strlen(pos);
 533     *(pos) = '\0';
 534     return (rd);
 535 }
 536
 537 static int
 538 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
 539 {
 540         u_int8_t route_target[8];
 541         u_int plen;
 542
 543         TCHECK(pptr[0]);
 544         plen = pptr[0];   /* get prefix length */
 545
 546         if (0 == plen)
 547                 return 1; /* default route target */
 548
 549         if (32 > plen)
 550                 return -1;
 551
 552         plen-=32; /* adjust prefix length */
 553
 554         if (64 < plen)
 555                 return -1;
 556
 557         memset(&route_target, 0, sizeof(route_target));
 558         TCHECK2(pptr[1], (plen + 7) / 8);
 559         memcpy(&route_target, &pptr[1], (plen + 7) / 8);
 560         if (plen % 8) {
 561                 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
 562                         ((0xff00 >> (plen % 8)) & 0xff);
 563         }
 564         snprintf(buf, buflen, "origin AS: %u, route target %s",
 565                  EXTRACT_32BITS(pptr+1),
 566                  bgp_vpn_rd_print((u_char *)&route_target));
 567
 568         return 5 + (plen + 7) / 8;
 569
 570 trunc:
 571         return -2;
 572 }
 573
 574 static int
 575 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
 576 {
 577         struct in_addr addr;
 578         u_int plen;
 579
 580         TCHECK(pptr[0]);
 581         plen = pptr[0];   /* get prefix length */
 582
 583         if ((24+64) > plen)
 584                 return -1;
 585
 586         plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
 587
 588         if (32 < plen)
 589                 return -1;
 590
 591         memset(&addr, 0, sizeof(addr));
 592         TCHECK2(pptr[12], (plen + 7) / 8);
 593         memcpy(&addr, &pptr[12], (plen + 7) / 8);
 594         if (plen % 8) {
 595                 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
 596                         ((0xff00 >> (plen % 8)) & 0xff);
 597         }
 598         /* the label may get offsetted by 4 bits so lets shift it right */
 599         snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
 600                  bgp_vpn_rd_print(pptr+4),
 601                  getname((u_char *)&addr),
 602                  plen,
 603                  EXTRACT_24BITS(pptr+1)>>4,
 604                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 605
 606         return 12 + (plen + 7) / 8;
 607
 608 trunc:
 609         return -2;
 610 }
 611
 612 /*
 613  * As I remember, some versions of systems have an snprintf() that
 614  * returns -1 if the buffer would have overflowed.  If the return
 615  * value is negative, set buflen to 0, to indicate that we've filled
 616  * the buffer up.
 617  *
 618  * If the return value is greater than buflen, that means that
 619  * the buffer would have overflowed; again, set buflen to 0 in
 620  * that case.
 621  */
 622 #define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
 623     if (strlen<0) \
 624         buflen=0; \
 625     else if ((u_int)strlen>buflen) \
 626         buflen=0; \
 627     else { \
 628         buflen-=strlen; \
 629         buf+=strlen; \
 630     }
 631
 632 static int
 633 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
 634 {
 635         int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
 636
 637         TCHECK2(pptr[0], 2);
 638         plen=EXTRACT_16BITS(pptr);
 639         tlen=plen;
 640         pptr+=2;
 641         TCHECK2(pptr[0],15);
 642         buf[0]='\0';
 643         strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
 644                         bgp_vpn_rd_print(pptr),
 645                         EXTRACT_16BITS(pptr+8),
 646                         EXTRACT_16BITS(pptr+10),
 647                         EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
 648         UPDATE_BUF_BUFLEN(buf, buflen, strlen);
 649         pptr+=15;
 650         tlen-=15;
 651
 652         /* ok now the variable part - lets read out TLVs*/
 653         while (tlen>0) {
 654             if (tlen < 3)
 655                 return -1;
 656             TCHECK2(pptr[0], 3);
 657             tlv_type=*pptr++;
 658             tlv_len=EXTRACT_16BITS(pptr);
 659             ttlv_len=tlv_len;
 660             pptr+=2;
 661
 662             switch(tlv_type) {
 663             case 1:
 664                 if (buflen!=0) {
 665                     strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
 666                                     tlv_type,
 667                                     tlv_len);
 668                     UPDATE_BUF_BUFLEN(buf, buflen, strlen);
 669                 }
 670                 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
 671                 while (ttlv_len>0) {
 672                     TCHECK(pptr[0]);
 673                     if (buflen!=0) {
 674                         strlen=snprintf(buf,buflen, "%02x",*pptr++);
 675                         UPDATE_BUF_BUFLEN(buf, buflen, strlen);
 676                     }
 677                     ttlv_len--;
 678                 }
 679                 break;
 680             default:
 681                 if (buflen!=0) {
 682                     strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
 683                                     tlv_type,
 684                                     tlv_len);
 685                     UPDATE_BUF_BUFLEN(buf, buflen, strlen);
 686                 }
 687                 break;
 688             }
 689             tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
 690         }
 691         return plen+2;
 692
 693 trunc:
 694         return -2;
 695 }
 696
 697 #ifdef INET6
 698 int
 699 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
 700 {
 701         struct in6_addr addr;
 702         u_int plen;
 703
 704         TCHECK(pd[0]);
 705         plen = pd[0];
 706         if (128 < plen)
 707                 return -1;
 708
 709         memset(&addr, 0, sizeof(addr));
 710         TCHECK2(pd[1], (plen + 7) / 8);
 711         memcpy(&addr, &pd[1], (plen + 7) / 8);
 712         if (plen % 8) {
 713                 addr.s6_addr[(plen + 7) / 8 - 1] &=
 714                         ((0xff00 >> (plen % 8)) & 0xff);
 715         }
 716         snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
 717         return 1 + (plen + 7) / 8;
 718
 719 trunc:
 720         return -2;
 721 }
 722
 723 static int
 724 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
 725 {
 726         struct in6_addr addr;
 727         u_int plen;
 728
 729         TCHECK(pptr[0]);
 730         plen = pptr[0]; /* get prefix length */
 731
 732         if (24 > plen)
 733                 return -1;
 734
 735         plen-=24; /* adjust prefixlen - labellength */
 736
 737         if (128 < plen)
 738                 return -1;
 739
 740         memset(&addr, 0, sizeof(addr));
 741         TCHECK2(pptr[4], (plen + 7) / 8);
 742         memcpy(&addr, &pptr[4], (plen + 7) / 8);
 743         if (plen % 8) {
 744                 addr.s6_addr[(plen + 7) / 8 - 1] &=
 745                         ((0xff00 >> (plen % 8)) & 0xff);
 746         }
 747         /* the label may get offsetted by 4 bits so lets shift it right */
 748         snprintf(buf, buflen, "%s/%d, label:%u %s",
 749                  getname6((u_char *)&addr),
 750                  plen,
 751                  EXTRACT_24BITS(pptr+1)>>4,
 752                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 753
 754         return 4 + (plen + 7) / 8;
 755
 756 trunc:
 757         return -2;
 758 }
 759
 760 static int
 761 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
 762 {
 763         struct in6_addr addr;
 764         u_int plen;
 765
 766         TCHECK(pptr[0]);
 767         plen = pptr[0];   /* get prefix length */
 768
 769         if ((24+64) > plen)
 770                 return -1;
 771
 772         plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
 773
 774         if (128 < plen)
 775                 return -1;
 776
 777         memset(&addr, 0, sizeof(addr));
 778         TCHECK2(pptr[12], (plen + 7) / 8);
 779         memcpy(&addr, &pptr[12], (plen + 7) / 8);
 780         if (plen % 8) {
 781                 addr.s6_addr[(plen + 7) / 8 - 1] &=
 782                         ((0xff00 >> (plen % 8)) & 0xff);
 783         }
 784         /* the label may get offsetted by 4 bits so lets shift it right */
 785         snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
 786                  bgp_vpn_rd_print(pptr+4),
 787                  getname6((u_char *)&addr),
 788                  plen,
 789                  EXTRACT_24BITS(pptr+1)>>4,
 790                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 791
 792         return 12 + (plen + 7) / 8;
 793
 794 trunc:
 795         return -2;
 796 }
 797 #endif
 798
 799 static int
 800 decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
 801 {
 802         u_int8_t addr[19];
 803         u_int plen;
 804
 805         TCHECK(pptr[0]);
 806         plen = pptr[0]; /* get prefix length */
 807
 808         if (152 < plen)
 809                 return -1;
 810
 811         memset(&addr, 0, sizeof(addr));
 812         TCHECK2(pptr[4], (plen + 7) / 8);
 813         memcpy(&addr, &pptr[4], (plen + 7) / 8);
 814         if (plen % 8) {
 815                 addr[(plen + 7) / 8 - 1] &=
 816                         ((0xff00 >> (plen % 8)) & 0xff);
 817         }
 818         snprintf(buf, buflen, "%s/%d",
 819                  isonsap_string(addr,(plen + 7) / 8),
 820                  plen);
 821
 822         return 1 + (plen + 7) / 8;
 823
 824 trunc:
 825         return -2;
 826 }
 827
 828 static int
 829 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
 830 {
 831         u_int8_t addr[19];
 832         u_int plen;
 833
 834         TCHECK(pptr[0]);
 835         plen = pptr[0];   /* get prefix length */
 836
 837         if ((24+64) > plen)
 838                 return -1;
 839
 840         plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
 841
 842         if (152 < plen)
 843                 return -1;
 844
 845         memset(&addr, 0, sizeof(addr));
 846         TCHECK2(pptr[12], (plen + 7) / 8);
 847         memcpy(&addr, &pptr[12], (plen + 7) / 8);
 848         if (plen % 8) {
 849                 addr[(plen + 7) / 8 - 1] &=
 850                         ((0xff00 >> (plen % 8)) & 0xff);
 851         }
 852         /* the label may get offsetted by 4 bits so lets shift it right */
 853         snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
 854                  bgp_vpn_rd_print(pptr+4),
 855                  isonsap_string(addr,(plen + 7) / 8),
 856                  plen,
 857                  EXTRACT_24BITS(pptr+1)>>4,
 858                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 859
 860         return 12 + (plen + 7) / 8;
 861
 862 trunc:
 863         return -2;
 864 }
 865
 866 static int
 867 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
 868 {
 869         int i;
 870         u_int16_t af;
 871         u_int8_t safi, snpa, nhlen;
 872         union { /* copy buffer for bandwidth values */
 873             float f;
 874             u_int32_t i;
 875         } bw;
 876         int advance;
 877         int tlen;
 878         const u_char *tptr;
 879         char buf[MAXHOSTNAMELEN + 100];
 880         char tokbuf[TOKBUFSIZE];
 881
 882         tptr = pptr;
 883         tlen=len;
 884
 885         switch (attr->bgpa_type) {
 886         case BGPTYPE_ORIGIN:
 887                 if (len != 1)
 888                         printf("invalid len");
 889                 else {
 890                         TCHECK(*tptr);
 891                         printf("%s", tok2strbuf(bgp_origin_values,
 892                                                 "Unknown Origin Typecode",
 893                                                 tptr[0],
 894                                                 tokbuf, sizeof(tokbuf)));
 895                 }
 896                 break;
 897
 898         case BGPTYPE_AS_PATH:
 899                 if (len % 2) {
 900                         printf("invalid len");
 901                         break;
 902                 }
 903                 if (!len) {
 904                         printf("empty");
 905                         break;
 906                 }
 907
 908                 while (tptr < pptr + len) {
 909                         TCHECK(tptr[0]);
 910                         printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
 911                                                 "?", tptr[0],
 912                                                 tokbuf, sizeof(tokbuf)));
 913                         for (i = 0; i < tptr[1] * 2; i += 2) {
 914                             TCHECK2(tptr[2 + i], 2);
 915                             printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
 916                         }
 917                         TCHECK(tptr[0]);
 918                         printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
 919                                                 "?", tptr[0],
 920                                                 tokbuf, sizeof(tokbuf)));
 921                         TCHECK(tptr[1]);
 922                         tptr += 2 + tptr[1] * 2;
 923                 }
 924                 break;
 925         case BGPTYPE_NEXT_HOP:
 926                 if (len != 4)
 927                         printf("invalid len");
 928                 else {
 929                         TCHECK2(tptr[0], 4);
 930                         printf("%s", getname(tptr));
 931                 }
 932                 break;
 933         case BGPTYPE_MULTI_EXIT_DISC:
 934         case BGPTYPE_LOCAL_PREF:
 935                 if (len != 4)
 936                         printf("invalid len");
 937                 else {
 938                         TCHECK2(tptr[0], 4);
 939                         printf("%u", EXTRACT_32BITS(tptr));
 940                 }
 941                 break;
 942         case BGPTYPE_ATOMIC_AGGREGATE:
 943                 if (len != 0)
 944                         printf("invalid len");
 945                 break;
 946         case BGPTYPE_AGGREGATOR:
 947                 if (len != 6) {
 948                         printf("invalid len");
 949                         break;
 950                 }
 951                 TCHECK2(tptr[0], 6);
 952                 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
 953                         getname(tptr + 2));
 954                 break;
 955         case BGPTYPE_COMMUNITIES:
 956                 if (len % 4) {
 957                         printf("invalid len");
 958                         break;
 959                 }
 960                 while (tlen>0) {
 961                         u_int32_t comm;
 962                         TCHECK2(tptr[0], 4);
 963                         comm = EXTRACT_32BITS(tptr);
 964                         switch (comm) {
 965                         case BGP_COMMUNITY_NO_EXPORT:
 966                                 printf(" NO_EXPORT");
 967                                 break;
 968                         case BGP_COMMUNITY_NO_ADVERT:
 969                                 printf(" NO_ADVERTISE");
 970                                 break;
 971                         case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
 972                                 printf(" NO_EXPORT_SUBCONFED");
 973                                 break;
 974                         default:
 975                                 printf("%u:%u%s",
 976                                        (comm >> 16) & 0xffff,
 977                                        comm & 0xffff,
 978                                        (tlen>4) ? ", " : "");
 979                                 break;
 980                         }
 981                         tlen -=4;
 982                         tptr +=4;
 983                 }
 984                 break;
 985         case BGPTYPE_ORIGINATOR_ID:
 986                 if (len != 4) {
 987                         printf("invalid len");
 988                         break;
 989                 }
 990                 TCHECK2(tptr[0], 4);
 991                 printf("%s",getname(tptr));
 992                 break;
 993         case BGPTYPE_CLUSTER_LIST:
 994                 if (len % 4) {
 995                         printf("invalid len");
 996                         break;
 997                 }
 998                 while (tlen>0) {
 999                         TCHECK2(tptr[0], 4);
1000                         printf("%s%s",
1001                                getname(tptr),
1002                                 (tlen>4) ? ", " : "");
1003                         tlen -=4;
1004                         tptr +=4;
1005                 }
1006                 break;
1007         case BGPTYPE_MP_REACH_NLRI:
1008                 TCHECK2(tptr[0], 3);
1009                 af = EXTRACT_16BITS(tptr);
1010                 safi = tptr[2];
1011
1012                 printf("\n\t    AFI: %s (%u), %sSAFI: %s (%u)",
1013                        tok2strbuf(af_values, "Unknown AFI", af,
1014                                   tokbuf, sizeof(tokbuf)),
1015                        af,
1016                        (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1017                        tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1018                                   tokbuf, sizeof(tokbuf)),
1019                        safi);
1020
1021                 switch(af<<8 | safi) {
1022                 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1023                 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1024                 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1025                 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1026                 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1027                 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1028                 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1029                 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1030 #ifdef INET6
1031                 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1032                 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1033                 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1034                 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1035                 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1036                 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1037                 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1038                 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1039 #endif
1040                 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1041                 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1042                 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1043                 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1044                 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1045                 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1046                 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1047                 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1048                 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1049                 case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1050                     break;
1051                 default:
1052                     TCHECK2(tptr[0], tlen);
1053                     printf("\n\t    no AFI %u / SAFI %u decoder",af,safi);
1054                     if (vflag <= 1)
1055                         print_unknown_data(tptr,"\n\t    ",tlen);
1056                     goto done;
1057                     break;
1058                 }
1059
1060                 tptr +=3;
1061
1062                 TCHECK(tptr[0]);
1063                 nhlen = tptr[0];
1064                 tlen = nhlen;
1065                 tptr++;
1066
1067                 if (tlen) {
1068                     printf("\n\t    nexthop: ");
1069                     while (tlen > 0) {
1070                         switch(af<<8 | safi) {
1071                         case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1072                         case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1073                         case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1074                         case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1075                         case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1076                             if (tlen < (int)sizeof(struct in_addr)) {
1077                                 printf("invalid len");
1078                                 tlen = 0;
1079                             } else {
1080                                 TCHECK2(tptr[0], sizeof(struct in_addr));
1081                                 printf("%s",getname(tptr));
1082                                 tlen -= sizeof(struct in_addr);
1083                                 tptr += sizeof(struct in_addr);
1084                             }
1085                             break;
1086                         case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1087                         case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1088                         case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1089                             if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1090                                 printf("invalid len");
1091                                 tlen = 0;
1092                             } else {
1093                                 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1094                                 printf("RD: %s, %s",
1095                                        bgp_vpn_rd_print(tptr),
1096                                        getname(tptr+BGP_VPN_RD_LEN));
1097                                 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1098                                 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1099                             }
1100                             break;
1101 #ifdef INET6
1102                         case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1103                         case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1104                         case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1105                         case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1106                         case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1107                             if (tlen < (int)sizeof(struct in6_addr)) {
1108                                 printf("invalid len");
1109                                 tlen = 0;
1110                             } else {
1111                                 TCHECK2(tptr[0], sizeof(struct in6_addr));
1112                                 printf("%s", getname6(tptr));
1113                                 tlen -= sizeof(struct in6_addr);
1114                                 tptr += sizeof(struct in6_addr);
1115                             }
1116                             break;
1117                         case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1118                         case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1119                         case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1120                             if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1121                                 printf("invalid len");
1122                                 tlen = 0;
1123                             } else {
1124                                 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1125                                 printf("RD: %s, %s",
1126                                        bgp_vpn_rd_print(tptr),
1127                                        getname6(tptr+BGP_VPN_RD_LEN));
1128                                 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1129                                 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1130                             }
1131                             break;
1132 #endif
1133                         case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1134                         case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1135                         case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1136                         case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1137                             if (tlen < (int)sizeof(struct in_addr)) {
1138                                 printf("invalid len");
1139                                 tlen = 0;
1140                             } else {
1141                                 TCHECK2(tptr[0], sizeof(struct in_addr));
1142                                 printf("%s", getname(tptr));
1143                                 tlen -= (sizeof(struct in_addr));
1144                                 tptr += (sizeof(struct in_addr));
1145                             }
1146                             break;
1147                         case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1148                         case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1149                         case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1150                             TCHECK2(tptr[0], tlen);
1151                             printf("%s",isonsap_string(tptr,tlen));
1152                             tptr += tlen;
1153                             tlen = 0;
1154                             break;
1155
1156                         case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1157                         case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1158                         case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1159                             if (tlen < BGP_VPN_RD_LEN+1) {
1160                                 printf("invalid len");
1161                                 tlen = 0;
1162                             } else {
1163                                 TCHECK2(tptr[0], tlen);
1164                                 printf("RD: %s, %s",
1165                                        bgp_vpn_rd_print(tptr),
1166                                        isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1167                                 /* rfc986 mapped IPv4 address ? */
1168                                 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) ==  0x47000601)
1169                                     printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1170 #ifdef INET6
1171                                 /* rfc1888 mapped IPv6 address ? */
1172                                 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) ==  0x350000)
1173                                     printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1174 #endif
1175                                 tptr += tlen;
1176                                 tlen = 0;
1177                             }
1178                             break;
1179                         default:
1180                             TCHECK2(tptr[0], tlen);
1181                             printf("no AFI %u/SAFI %u decoder",af,safi);
1182                             if (vflag <= 1)
1183                                 print_unknown_data(tptr,"\n\t    ",tlen);
1184                             tptr += tlen;
1185                             tlen = 0;
1186                             goto done;
1187                             break;
1188                         }
1189                     }
1190                 }
1191                 printf(", nh-length: %u", nhlen);
1192                 tptr += tlen;
1193
1194                 TCHECK(tptr[0]);
1195                 snpa = tptr[0];
1196                 tptr++;
1197
1198                 if (snpa) {
1199                         printf("\n\t    %u SNPA", snpa);
1200                         for (/*nothing*/; snpa > 0; snpa--) {
1201                                 TCHECK(tptr[0]);
1202                                 printf("\n\t      %d bytes", tptr[0]);
1203                                 tptr += tptr[0] + 1;
1204                         }
1205                 } else {
1206                         printf(", no SNPA");
1207                 }
1208
1209                 while (len - (tptr - pptr) > 0) {
1210                     switch (af<<8 | safi) {
1211                     case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1212                     case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1213                     case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1214                         advance = decode_prefix4(tptr, buf, sizeof(buf));
1215                         if (advance == -1)
1216                             printf("\n\t    (illegal prefix length)");
1217                         else if (advance == -2)
1218                             goto trunc;
1219                         else
1220                             printf("\n\t      %s", buf);
1221                         break;
1222                     case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1223                         advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1224                         if (advance == -1)
1225                             printf("\n\t    (illegal prefix length)");
1226                         else if (advance == -2)
1227                             goto trunc;
1228                         else
1229                             printf("\n\t      %s", buf);
1230                         break;
1231                     case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1232                     case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1233                     case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1234                         advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1235                         if (advance == -1)
1236                             printf("\n\t    (illegal prefix length)");
1237                         else if (advance == -2)
1238                             goto trunc;
1239                         else
1240                             printf("\n\t      %s", buf);
1241                         break;
1242                     case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1243                         advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1244                         if (advance == -1)
1245                             printf("\n\t    (illegal prefix length)");
1246                         else if (advance == -2)
1247                             goto trunc;
1248                         else
1249                             printf("\n\t      %s", buf);
1250                         break;
1251 #ifdef INET6
1252                     case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1253                     case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1254                     case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1255                         advance = decode_prefix6(tptr, buf, sizeof(buf));
1256                         if (advance == -1)
1257                             printf("\n\t    (illegal prefix length)");
1258                         else if (advance == -2)
1259                             goto trunc;
1260                         else
1261                             printf("\n\t      %s", buf);
1262                         break;
1263                     case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1264                         advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1265                         if (advance == -1)
1266                             printf("\n\t    (illegal prefix length)");
1267                         else if (advance == -2)
1268                             goto trunc;
1269                         else
1270                             printf("\n\t      %s", buf);
1271                         break;
1272                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1273                     case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1274                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1275                         advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1276                         if (advance == -1)
1277                             printf("\n\t    (illegal prefix length)");
1278                         else if (advance == -2)
1279                             goto trunc;
1280                         else
1281                             printf("\n\t      %s", buf);
1282                         break;
1283                     case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1284                         advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1285                         if (advance == -1)
1286                             printf("\n\t    (illegal prefix length)");
1287                         else if (advance == -2)
1288                             goto trunc;
1289                         else
1290                             printf("\n\t      %s", buf);
1291                         break;
1292 #endif
1293                     case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1294                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1295                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1296                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1297                         advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1298                         if (advance == -1)
1299                             printf("\n\t    (illegal length)");
1300                         else if (advance == -2)
1301                             goto trunc;
1302                         else
1303                             printf("\n\t      %s", buf);
1304                         break;
1305                     case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1306                     case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1307                     case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1308                         advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1309                         if (advance == -1)
1310                             printf("\n\t    (illegal prefix length)");
1311                         else if (advance == -2)
1312                             goto trunc;
1313                         else
1314                             printf("\n\t      %s", buf);
1315                         break;
1316                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1317                     case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1318                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1319                         advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1320                         if (advance == -1)
1321                             printf("\n\t    (illegal prefix length)");
1322                         else if (advance == -2)
1323                             goto trunc;
1324                         else
1325                             printf("\n\t      %s", buf);
1326                         break;
1327                     default:
1328                         TCHECK2(*tptr,tlen);
1329                         printf("\n\t    no AFI %u / SAFI %u decoder",af,safi);
1330                         if (vflag <= 1)
1331                             print_unknown_data(tptr,"\n\t    ",tlen);
1332                         advance = 0;
1333                         tptr = pptr + len;
1334                         break;
1335                     }
1336                     if (advance < 0)
1337                         break;
1338                     tptr += advance;
1339                 }
1340         done:
1341                 break;
1342
1343         case BGPTYPE_MP_UNREACH_NLRI:
1344                 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1345                 af = EXTRACT_16BITS(tptr);
1346                 safi = tptr[2];
1347
1348                 printf("\n\t    AFI: %s (%u), %sSAFI: %s (%u)",
1349                        tok2strbuf(af_values, "Unknown AFI", af,
1350                                   tokbuf, sizeof(tokbuf)),
1351                        af,
1352                        (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1353                        tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1354                                   tokbuf, sizeof(tokbuf)),
1355                        safi);
1356
1357                 if (len == BGP_MP_NLRI_MINSIZE)
1358                     printf("\n\t      End-of-Rib Marker (empty NLRI)");
1359
1360                 tptr += 3;
1361
1362                 while (len - (tptr - pptr) > 0) {
1363                     switch (af<<8 | safi) {
1364                     case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1365                     case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1366                     case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1367                         advance = decode_prefix4(tptr, buf, sizeof(buf));
1368                         if (advance == -1)
1369                             printf("\n\t    (illegal prefix length)");
1370                         else if (advance == -2)
1371                             goto trunc;
1372                         else
1373                             printf("\n\t      %s", buf);
1374                         break;
1375                     case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1376                         advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1377                         if (advance == -1)
1378                             printf("\n\t    (illegal prefix length)");
1379                         else if (advance == -2)
1380                             goto trunc;
1381                         else
1382                             printf("\n\t      %s", buf);
1383                         break;
1384                     case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1385                     case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1386                     case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1387                         advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1388                         if (advance == -1)
1389                             printf("\n\t    (illegal prefix length)");
1390                         else if (advance == -2)
1391                             goto trunc;
1392                         else
1393                             printf("\n\t      %s", buf);
1394                         break;
1395 #ifdef INET6
1396                     case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1397                     case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1398                     case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1399                         advance = decode_prefix6(tptr, buf, sizeof(buf));
1400                         if (advance == -1)
1401                             printf("\n\t    (illegal prefix length)");
1402                         else if (advance == -2)
1403                             goto trunc;
1404                         else
1405                             printf("\n\t      %s", buf);
1406                         break;
1407                     case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1408                         advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1409                         if (advance == -1)
1410                             printf("\n\t    (illegal prefix length)");
1411                         else if (advance == -2)
1412                             goto trunc;
1413                         else
1414                             printf("\n\t      %s", buf);
1415                         break;
1416                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1417                     case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1418                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1419                         advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1420                         if (advance == -1)
1421                             printf("\n\t    (illegal prefix length)");
1422                         else if (advance == -2)
1423                             goto trunc;
1424                         else
1425                             printf("\n\t      %s", buf);
1426                         break;
1427 #endif
1428                     case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
1429                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1430                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1431                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1432                         advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1433                         if (advance == -1)
1434                             printf("\n\t    (illegal length)");
1435                         else if (advance == -2)
1436                             goto trunc;
1437                         else
1438                             printf("\n\t      %s", buf);
1439                         break;
1440                     case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1441                     case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1442                     case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1443                         advance = decode_clnp_prefix(tptr, buf, sizeof(buf));
1444                         if (advance == -1)
1445                             printf("\n\t    (illegal prefix length)");
1446                         else if (advance == -2)
1447                             goto trunc;
1448                         else
1449                             printf("\n\t      %s", buf);
1450                         break;
1451                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1452                     case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1453                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1454                         advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1455                         if (advance == -1)
1456                             printf("\n\t    (illegal prefix length)");
1457                         else if (advance == -2)
1458                             goto trunc;
1459                         else
1460                             printf("\n\t      %s", buf);
1461                         break;
1462                     default:
1463                         TCHECK2(*(tptr-3),tlen);
1464                         printf("no AFI %u / SAFI %u decoder",af,safi);
1465                         if (vflag <= 1)
1466                             print_unknown_data(tptr-3,"\n\t    ",tlen);
1467                         advance = 0;
1468                         tptr = pptr + len;
1469                         break;
1470                     }
1471                     if (advance < 0)
1472                         break;
1473                     tptr += advance;
1474                 }
1475                 break;
1476         case BGPTYPE_EXTD_COMMUNITIES:
1477                 if (len % 8) {
1478                         printf("invalid len");
1479                         break;
1480                 }
1481                 while (tlen>0) {
1482                     u_int16_t extd_comm;
1483
1484                     TCHECK2(tptr[0], 2);
1485                     extd_comm=EXTRACT_16BITS(tptr);
1486
1487                     printf("\n\t    %s (0x%04x), Flags [%s]",
1488                            tok2strbuf(bgp_extd_comm_subtype_values,
1489                                       "unknown extd community typecode",
1490                                       extd_comm, tokbuf, sizeof(tokbuf)),
1491                            extd_comm,
1492                            bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1493
1494                     TCHECK2(*(tptr+2), 6);
1495                     switch(extd_comm) {
1496                     case BGP_EXT_COM_RT_0:
1497                     case BGP_EXT_COM_RO_0:
1498                         printf(": %u:%s",
1499                                EXTRACT_16BITS(tptr+2),
1500                                getname(tptr+4));
1501                         break;
1502                     case BGP_EXT_COM_RT_1:
1503                     case BGP_EXT_COM_RO_1:
1504                         printf(": %s:%u",
1505                                getname(tptr+2),
1506                                EXTRACT_16BITS(tptr+6));
1507                         break;
1508                     case BGP_EXT_COM_RT_2:
1509                     case BGP_EXT_COM_RO_2:
1510                         printf(": %u:%u",
1511                                EXTRACT_32BITS(tptr+2),
1512                                EXTRACT_16BITS(tptr+6));
1513                         break;
1514                     case BGP_EXT_COM_LINKBAND:
1515                         bw.i = EXTRACT_32BITS(tptr+2);
1516                         printf(": bandwidth: %.3f Mbps",
1517                                bw.f*8/1000000);
1518                         break;
1519                     case BGP_EXT_COM_CISCO_MCAST:
1520                         printf(": AS %u, group %s",
1521                                EXTRACT_16BITS(tptr+2),
1522                                getname(tptr+4));
1523                         break;
1524                     case BGP_EXT_COM_VPN_ORIGIN:
1525                     case BGP_EXT_COM_VPN_ORIGIN2:
1526                     case BGP_EXT_COM_VPN_ORIGIN3:
1527                     case BGP_EXT_COM_VPN_ORIGIN4:
1528                     case BGP_EXT_COM_OSPF_RID:
1529                     case BGP_EXT_COM_OSPF_RID2:
1530                         printf("%s", getname(tptr+2));
1531                         break;
1532                     case BGP_EXT_COM_OSPF_RTYPE:
1533                     case BGP_EXT_COM_OSPF_RTYPE2:
1534                         printf(": area:%s, router-type:%s, metric-type:%s%s",
1535                                getname(tptr+2),
1536                                tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1537                                           "unknown (0x%02x)",
1538                                           *(tptr+6),
1539                                           tokbuf, sizeof(tokbuf)),
1540                                (*(tptr+7) &  BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1541                                ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(tptr+6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
1542                         break;
1543                     case BGP_EXT_COM_L2INFO:
1544                         printf(": %s Control Flags [0x%02x]:MTU %u",
1545                                tok2strbuf(l2vpn_encaps_values,
1546                                           "unknown encaps",
1547                                           *(tptr+2),
1548                                           tokbuf, sizeof(tokbuf)),
1549                                        *(tptr+3),
1550                                EXTRACT_16BITS(tptr+4));
1551                         break;
1552                     default:
1553                         TCHECK2(*tptr,8);
1554                         print_unknown_data(tptr,"\n\t      ",8);
1555                         break;
1556                     }
1557                     tlen -=8;
1558                     tptr +=8;
1559                 }
1560                 break;
1561
1562         case BGPTYPE_ATTR_SET:
1563                 TCHECK2(tptr[0], 4);
1564                 printf("\n\t    Origin AS: %u", EXTRACT_32BITS(tptr));
1565                 tptr+=4;
1566                 len -=4;
1567
1568                 while (len >= 2 ) {
1569                     int alen;
1570                     struct bgp_attr bgpa;
1571
1572                     TCHECK2(tptr[0], sizeof(bgpa));
1573                     memcpy(&bgpa, tptr, sizeof(bgpa));
1574                     alen = bgp_attr_len(&bgpa);
1575                     tptr += bgp_attr_off(&bgpa);
1576                     len -= bgp_attr_off(&bgpa);
1577
1578                     printf("\n\t      %s (%u), length: %u",
1579                            tok2strbuf(bgp_attr_values,
1580                                       "Unknown Attribute", bgpa.bgpa_type,
1581                                       tokbuf, sizeof(tokbuf)),
1582                            bgpa.bgpa_type,
1583                            alen);
1584
1585                     if (bgpa.bgpa_flags) {
1586                         printf(", Flags [%s%s%s%s",
1587                                bgpa.bgpa_flags & 0x80 ? "O" : "",
1588                                bgpa.bgpa_flags & 0x40 ? "T" : "",
1589                                bgpa.bgpa_flags & 0x20 ? "P" : "",
1590                                bgpa.bgpa_flags & 0x10 ? "E" : "");
1591                         if (bgpa.bgpa_flags & 0xf)
1592                             printf("+%x", bgpa.bgpa_flags & 0xf);
1593                         printf("]: ");
1594                     }
1595                     /* FIXME check for recursion */
1596                     if (!bgp_attr_print(&bgpa, tptr, alen))
1597                         return 0;
1598                     tptr += alen;
1599                     len -= alen;
1600                 }
1601                 break;
1602
1603
1604         default:
1605             TCHECK2(*pptr,len);
1606             printf("\n\t    no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1607             if (vflag <= 1)
1608                 print_unknown_data(pptr,"\n\t    ",len);
1609             break;
1610         }
1611         if (vflag > 1 && len) { /* omit zero length attributes*/
1612             TCHECK2(*pptr,len);
1613             print_unknown_data(pptr,"\n\t    ",len);
1614         }
1615         return 1;
1616
1617 trunc:
1618         return 0;
1619 }
1620
1621 static void
1622 bgp_open_print(const u_char *dat, int length)
1623 {
1624         struct bgp_open bgpo;
1625         struct bgp_opt bgpopt;
1626         const u_char *opt;
1627         int i,cap_type,cap_len,tcap_len,cap_offset;
1628         char tokbuf[TOKBUFSIZE];
1629         char tokbuf2[TOKBUFSIZE];
1630
1631         TCHECK2(dat[0], BGP_OPEN_SIZE);
1632         memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1633
1634         printf("\n\t  Version %d, ", bgpo.bgpo_version);
1635         printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1636         printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1637         printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1638         printf("\n\t  Optional parameters, length: %u", bgpo.bgpo_optlen);
1639
1640         /* some little sanity checking */
1641         if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1642             return;
1643
1644         /* ugly! */
1645         opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1646         opt++;
1647
1648         i = 0;
1649         while (i < bgpo.bgpo_optlen) {
1650                 TCHECK2(opt[i], BGP_OPT_SIZE);
1651                 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1652                 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1653                         printf("\n\t     Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1654                         break;
1655                 }
1656
1657                 printf("\n\t    Option %s (%u), length: %u",
1658                        tok2strbuf(bgp_opt_values,"Unknown",
1659                                   bgpopt.bgpopt_type,
1660                                   tokbuf, sizeof(tokbuf)),
1661                        bgpopt.bgpopt_type,
1662                        bgpopt.bgpopt_len);
1663
1664                 /* now lets decode the options we know*/
1665                 switch(bgpopt.bgpopt_type) {
1666                 case BGP_OPT_CAP:
1667                     cap_type=opt[i+BGP_OPT_SIZE];
1668                     cap_len=opt[i+BGP_OPT_SIZE+1];
1669                     tcap_len=cap_len;
1670                     printf("\n\t      %s (%u), length: %u",
1671                            tok2strbuf(bgp_capcode_values, "Unknown",
1672                                       cap_type, tokbuf, sizeof(tokbuf)),
1673                            cap_type,
1674                            cap_len);
1675                     switch(cap_type) {
1676                     case BGP_CAPCODE_MP:
1677                         printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1678                                tok2strbuf(af_values, "Unknown",
1679                                           EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1680                                           tokbuf, sizeof(tokbuf)),
1681                                EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1682                                tok2strbuf(bgp_safi_values, "Unknown",
1683                                           opt[i+BGP_OPT_SIZE+5],
1684                                           tokbuf, sizeof(tokbuf)),
1685                                opt[i+BGP_OPT_SIZE+5]);
1686                         break;
1687                     case BGP_CAPCODE_RESTART:
1688                         printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1689                                ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1690                                EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1691                         tcap_len-=2;
1692                         cap_offset=4;
1693                         while(tcap_len>=4) {
1694                             printf("\n\t\t  AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1695                                    tok2strbuf(af_values,"Unknown",
1696                                               EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1697                                               tokbuf, sizeof(tokbuf)),
1698                                    EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1699                                    tok2strbuf(bgp_safi_values,"Unknown",
1700                                               opt[i+BGP_OPT_SIZE+cap_offset+2],
1701                                               tokbuf2, sizeof(tokbuf2)),
1702                                    opt[i+BGP_OPT_SIZE+cap_offset+2],
1703                                    ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1704                             tcap_len-=4;
1705                             cap_offset+=4;
1706                         }
1707                         break;
1708                     case BGP_CAPCODE_RR:
1709                     case BGP_CAPCODE_RR_CISCO:
1710                         break;
1711                     default:
1712                         TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1713                         printf("\n\t\tno decoder for Capability %u",
1714                                cap_type);
1715                         if (vflag <= 1)
1716                             print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1717                         break;
1718                     }
1719                     if (vflag > 1) {
1720                         TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1721                         print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1722                     }
1723                     break;
1724                 case BGP_OPT_AUTH:
1725                 default:
1726                        printf("\n\t      no decoder for option %u",
1727                            bgpopt.bgpopt_type);
1728                        break;
1729                 }
1730
1731                 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1732         }
1733         return;
1734 trunc:
1735         printf("[|BGP]");
1736 }
1737
1738 static void
1739 bgp_update_print(const u_char *dat, int length)
1740 {
1741         struct bgp bgp;
1742         struct bgp_attr bgpa;
1743         const u_char *p;
1744         int len;
1745         int i;
1746         char tokbuf[TOKBUFSIZE];
1747
1748         TCHECK2(dat[0], BGP_SIZE);
1749         memcpy(&bgp, dat, BGP_SIZE);
1750         p = dat + BGP_SIZE;     /*XXX*/
1751
1752         /* Unfeasible routes */
1753         len = EXTRACT_16BITS(p);
1754         if (len) {
1755                 /*
1756                  * Without keeping state from the original NLRI message,
1757                  * it's not possible to tell if this a v4 or v6 route,
1758                  * so only try to decode it if we're not v6 enabled.
1759                  */
1760 #ifdef INET6
1761                 printf("\n\t  Withdrawn routes: %d bytes", len);
1762 #else
1763                 char buf[MAXHOSTNAMELEN + 100];
1764                 int wpfx;
1765
1766                 TCHECK2(p[2], len);
1767                 i = 2;
1768
1769                 printf("\n\t  Withdrawn routes:");
1770
1771                 while(i < 2 + len) {
1772                         wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1773                         if (wpfx == -1) {
1774                                 printf("\n\t    (illegal prefix length)");
1775                                 break;
1776                         } else if (wpfx == -2)
1777                                 goto trunc;
1778                         else {
1779                                 i += wpfx;
1780                                 printf("\n\t    %s", buf);
1781                         }
1782                 }
1783 #endif
1784         }
1785         p += 2 + len;
1786
1787         TCHECK2(p[0], 2);
1788         len = EXTRACT_16BITS(p);
1789
1790         if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1791             printf("\n\t  End-of-Rib Marker (empty NLRI)");
1792             return;
1793         }
1794
1795         if (len) {
1796                 /* do something more useful!*/
1797                 i = 2;
1798                 while (i < 2 + len) {
1799                         int alen, aoff;
1800
1801                         TCHECK2(p[i], sizeof(bgpa));
1802                         memcpy(&bgpa, &p[i], sizeof(bgpa));
1803                         alen = bgp_attr_len(&bgpa);
1804                         aoff = bgp_attr_off(&bgpa);
1805
1806                        printf("\n\t  %s (%u), length: %u",
1807                               tok2strbuf(bgp_attr_values, "Unknown Attribute",
1808                                          bgpa.bgpa_type,
1809                                          tokbuf, sizeof(tokbuf)),
1810                               bgpa.bgpa_type,
1811                               alen);
1812
1813                         if (bgpa.bgpa_flags) {
1814                                 printf(", Flags [%s%s%s%s",
1815                                         bgpa.bgpa_flags & 0x80 ? "O" : "",
1816                                         bgpa.bgpa_flags & 0x40 ? "T" : "",
1817                                         bgpa.bgpa_flags & 0x20 ? "P" : "",
1818                                         bgpa.bgpa_flags & 0x10 ? "E" : "");
1819                                 if (bgpa.bgpa_flags & 0xf)
1820                                         printf("+%x", bgpa.bgpa_flags & 0xf);
1821                                 printf("]: ");
1822                         }
1823                         if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1824                                 goto trunc;
1825                         i += aoff + alen;
1826                 }
1827         }
1828         p += 2 + len;
1829
1830         if (dat + length > p) {
1831                 printf("\n\t  Updated routes:");
1832                 while (dat + length > p) {
1833                         char buf[MAXHOSTNAMELEN + 100];
1834                         i = decode_prefix4(p, buf, sizeof(buf));
1835                         if (i == -1) {
1836                                 printf("\n\t    (illegal prefix length)");
1837                                 break;
1838                         } else if (i == -2)
1839                                 goto trunc;
1840                         else {
1841                                 printf("\n\t    %s", buf);
1842                                 p += i;
1843                         }
1844                 }
1845         }
1846         return;
1847 trunc:
1848         printf("[|BGP]");
1849 }
1850
1851 static void
1852 bgp_notification_print(const u_char *dat, int length)
1853 {
1854         struct bgp_notification bgpn;
1855         const u_char *tptr;
1856         char tokbuf[TOKBUFSIZE];
1857         char tokbuf2[TOKBUFSIZE];
1858
1859         TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1860         memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1861
1862         /* some little sanity checking */
1863         if (length<BGP_NOTIFICATION_SIZE)
1864             return;
1865
1866         printf(", %s (%u)",
1867                tok2strbuf(bgp_notify_major_values, "Unknown Error",
1868                           bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1869                bgpn.bgpn_major);
1870
1871         switch (bgpn.bgpn_major) {
1872
1873         case BGP_NOTIFY_MAJOR_MSG:
1874             printf(", subcode %s (%u)",
1875                    tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1876                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1877                    bgpn.bgpn_minor);
1878             break;
1879         case BGP_NOTIFY_MAJOR_OPEN:
1880             printf(", subcode %s (%u)",
1881                    tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1882                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1883                    bgpn.bgpn_minor);
1884             break;
1885         case BGP_NOTIFY_MAJOR_UPDATE:
1886             printf(", subcode %s (%u)",
1887                    tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1888                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1889                    bgpn.bgpn_minor);
1890             break;
1891         case BGP_NOTIFY_MAJOR_CAP:
1892             printf(" subcode %s (%u)",
1893                    tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1894                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1895                    bgpn.bgpn_minor);
1896         case BGP_NOTIFY_MAJOR_CEASE:
1897             printf(", subcode %s (%u)",
1898                    tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1899                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1900                    bgpn.bgpn_minor);
1901
1902             /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1903              * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1904              */
1905             if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1906                 tptr = dat + BGP_NOTIFICATION_SIZE;
1907                 TCHECK2(*tptr, 7);
1908                 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1909                        tok2strbuf(af_values, "Unknown",
1910                                   EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1911                        EXTRACT_16BITS(tptr),
1912                        tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1913                                   tokbuf2, sizeof(tokbuf)),
1914                        *(tptr+2),
1915                        EXTRACT_32BITS(tptr+3));
1916             }
1917             break;
1918         default:
1919             break;
1920         }
1921
1922         return;
1923 trunc:
1924         printf("[|BGP]");
1925 }
1926
1927 static void
1928 bgp_route_refresh_print(const u_char *pptr, int len) {
1929
1930         const struct bgp_route_refresh *bgp_route_refresh_header;
1931         char tokbuf[TOKBUFSIZE];
1932         char tokbuf2[TOKBUFSIZE];
1933
1934         TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1935
1936         /* some little sanity checking */
1937         if (len<BGP_ROUTE_REFRESH_SIZE)
1938             return;
1939
1940         bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1941
1942         printf("\n\t  AFI %s (%u), SAFI %s (%u)",
1943                tok2strbuf(af_values,"Unknown",
1944                           /* this stinks but the compiler pads the structure
1945                            * weird */
1946                           EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1947                           tokbuf, sizeof(tokbuf)),
1948                EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1949                tok2strbuf(bgp_safi_values,"Unknown",
1950                           bgp_route_refresh_header->safi,
1951                           tokbuf2, sizeof(tokbuf2)),
1952                bgp_route_refresh_header->safi);
1953
1954         if (vflag > 1) {
1955             TCHECK2(*pptr, len);
1956             print_unknown_data(pptr,"\n\t  ", len);
1957         }
1958
1959         return;
1960 trunc:
1961         printf("[|BGP]");
1962 }
1963
1964 static int
1965 bgp_header_print(const u_char *dat, int length)
1966 {
1967         struct bgp bgp;
1968         char tokbuf[TOKBUFSIZE];
1969
1970         TCHECK2(dat[0], BGP_SIZE);
1971         memcpy(&bgp, dat, BGP_SIZE);
1972         printf("\n\t%s Message (%u), length: %u",
1973                tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1974                           tokbuf, sizeof(tokbuf)),
1975                bgp.bgp_type,
1976                length);
1977
1978         switch (bgp.bgp_type) {
1979         case BGP_OPEN:
1980                 bgp_open_print(dat, length);
1981                 break;
1982         case BGP_UPDATE:
1983                 bgp_update_print(dat, length);
1984                 break;
1985         case BGP_NOTIFICATION:
1986                 bgp_notification_print(dat, length);
1987                 break;
1988         case BGP_KEEPALIVE:
1989                 break;
1990         case BGP_ROUTE_REFRESH:
1991                 bgp_route_refresh_print(dat, length);
1992                 break;
1993         default:
1994                 /* we have no decoder for the BGP message */
1995                 TCHECK2(*dat, length);
1996                 printf("\n\t  no Message %u decoder",bgp.bgp_type);
1997                 print_unknown_data(dat,"\n\t  ",length);
1998                 break;
1999         }
2000         return 1;
2001 trunc:
2002         printf("[|BGP]");
2003         return 0;
2004 }
2005
2006 void
2007 bgp_print(const u_char *dat, int length)
2008 {
2009         const u_char *p;
2010         const u_char *ep;
2011         const u_char *start;
2012         const u_char marker[] = {
2013                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2014                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
2015         };
2016         struct bgp bgp;
2017         u_int16_t hlen;
2018         char tokbuf[TOKBUFSIZE];
2019
2020         ep = dat + length;
2021         if (snapend < dat + length)
2022                 ep = snapend;
2023
2024         printf(": BGP, length: %u",length);
2025
2026         if (vflag < 1) /* lets be less chatty */
2027                 return;
2028
2029         p = dat;
2030         start = p;
2031         while (p < ep) {
2032                 if (!TTEST2(p[0], 1))
2033                         break;
2034                 if (p[0] != 0xff) {
2035                         p++;
2036                         continue;
2037                 }
2038
2039                 if (!TTEST2(p[0], sizeof(marker)))
2040                         break;
2041                 if (memcmp(p, marker, sizeof(marker)) != 0) {
2042                         p++;
2043                         continue;
2044                 }
2045
2046                 /* found BGP header */
2047                 TCHECK2(p[0], BGP_SIZE);        /*XXX*/
2048                 memcpy(&bgp, p, BGP_SIZE);
2049
2050                 if (start != p)
2051                         printf(" [|BGP]");
2052
2053                 hlen = ntohs(bgp.bgp_len);
2054                 if (hlen < BGP_SIZE) {
2055                         printf("\n[|BGP Bogus header length %u < %u]", hlen,
2056                             BGP_SIZE);
2057                         break;
2058                 }
2059
2060                 if (TTEST2(p[0], hlen)) {
2061                         if (!bgp_header_print(p, hlen))
2062                                 return;
2063                         p += hlen;
2064                         start = p;
2065                 } else {
2066                         printf("\n[|BGP %s]",
2067                                tok2strbuf(bgp_msg_values,
2068                                           "Unknown Message Type",
2069                                           bgp.bgp_type,
2070                                           tokbuf, sizeof(tokbuf)));
2071                         break;
2072                 }
2073         }
2074
2075         return;
2076
2077 trunc:
2078         printf(" [|BGP]");
2079 }