The Tcpdump Group git mirrors - tcpdump/blob - 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 1.95 2005-05-05 22:49:17 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
  54 struct bgp {
  55         u_int8_t bgp_marker[16];
  56         u_int16_t bgp_len;
  57         u_int8_t bgp_type;
  58 };
  59 #define BGP_SIZE                19      /* unaligned */
  60
  61 #define BGP_OPEN                1
  62 #define BGP_UPDATE              2
  63 #define BGP_NOTIFICATION        3
  64 #define BGP_KEEPALIVE           4
  65 #define BGP_ROUTE_REFRESH       5
  66
  67 static struct tok bgp_msg_values[] = {
  68     { BGP_OPEN,                 "Open"},
  69     { BGP_UPDATE,               "Update"},
  70     { BGP_NOTIFICATION,         "Notification"},
  71     { BGP_KEEPALIVE,            "Keepalive"},
  72     { BGP_ROUTE_REFRESH,        "Route Refresh"},
  73     { 0, NULL}
  74 };
  75
  76 struct bgp_open {
  77         u_int8_t bgpo_marker[16];
  78         u_int16_t bgpo_len;
  79         u_int8_t bgpo_type;
  80         u_int8_t bgpo_version;
  81         u_int16_t bgpo_myas;
  82         u_int16_t bgpo_holdtime;
  83         u_int32_t bgpo_id;
  84         u_int8_t bgpo_optlen;
  85         /* options should follow */
  86 };
  87 #define BGP_OPEN_SIZE           29      /* unaligned */
  88
  89 struct bgp_opt {
  90         u_int8_t bgpopt_type;
  91         u_int8_t bgpopt_len;
  92         /* variable length */
  93 };
  94 #define BGP_OPT_SIZE            2       /* some compilers may pad to 4 bytes */
  95
  96 #define BGP_UPDATE_MINSIZE      23
  97
  98 struct bgp_notification {
  99         u_int8_t bgpn_marker[16];
 100         u_int16_t bgpn_len;
 101         u_int8_t bgpn_type;
 102         u_int8_t bgpn_major;
 103         u_int8_t bgpn_minor;
 104 };
 105 #define BGP_NOTIFICATION_SIZE           21      /* unaligned */
 106
 107 struct bgp_route_refresh {
 108     u_int8_t  bgp_marker[16];
 109     u_int16_t len;
 110     u_int8_t  type;
 111     u_int8_t  afi[2]; /* the compiler messes this structure up               */
 112     u_int8_t  res;    /* when doing misaligned sequences of int8 and int16   */
 113     u_int8_t  safi;   /* afi should be int16 - so we have to access it using */
 114 };                    /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh)      */
 115 #define BGP_ROUTE_REFRESH_SIZE          23
 116
 117 struct bgp_attr {
 118         u_int8_t bgpa_flags;
 119         u_int8_t bgpa_type;
 120         union {
 121                 u_int8_t len;
 122                 u_int16_t elen;
 123         } bgpa_len;
 124 #define bgp_attr_len(p) \
 125         (((p)->bgpa_flags & 0x10) ? \
 126                 EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
 127 #define bgp_attr_off(p) \
 128         (((p)->bgpa_flags & 0x10) ? 4 : 3)
 129 };
 130
 131 #define BGPTYPE_ORIGIN                  1
 132 #define BGPTYPE_AS_PATH                 2
 133 #define BGPTYPE_NEXT_HOP                3
 134 #define BGPTYPE_MULTI_EXIT_DISC         4
 135 #define BGPTYPE_LOCAL_PREF              5
 136 #define BGPTYPE_ATOMIC_AGGREGATE        6
 137 #define BGPTYPE_AGGREGATOR              7
 138 #define BGPTYPE_COMMUNITIES             8       /* RFC1997 */
 139 #define BGPTYPE_ORIGINATOR_ID           9       /* RFC1998 */
 140 #define BGPTYPE_CLUSTER_LIST            10      /* RFC1998 */
 141 #define BGPTYPE_DPA                     11      /* draft-ietf-idr-bgp-dpa */
 142 #define BGPTYPE_ADVERTISERS             12      /* RFC1863 */
 143 #define BGPTYPE_RCID_PATH               13      /* RFC1863 */
 144 #define BGPTYPE_MP_REACH_NLRI           14      /* RFC2283 */
 145 #define BGPTYPE_MP_UNREACH_NLRI         15      /* RFC2283 */
 146 #define BGPTYPE_EXTD_COMMUNITIES        16      /* draft-ietf-idr-bgp-ext-communities */
 147 #define BGPTYPE_ATTR_SET               128      /* draft-marques-ppvpn-ibgp */
 148
 149 #define BGP_MP_NLRI_MINSIZE              3       /* End of RIB Marker detection */
 150
 151 static struct tok bgp_attr_values[] = {
 152     { BGPTYPE_ORIGIN,           "Origin"},
 153     { BGPTYPE_AS_PATH,          "AS Path"},
 154     { BGPTYPE_NEXT_HOP,         "Next Hop"},
 155     { BGPTYPE_MULTI_EXIT_DISC,  "Multi Exit Discriminator"},
 156     { BGPTYPE_LOCAL_PREF,       "Local Preference"},
 157     { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
 158     { BGPTYPE_AGGREGATOR,       "Aggregator"},
 159     { BGPTYPE_COMMUNITIES,      "Community"},
 160     { BGPTYPE_ORIGINATOR_ID,    "Originator ID"},
 161     { BGPTYPE_CLUSTER_LIST,     "Cluster List"},
 162     { BGPTYPE_DPA,              "DPA"},
 163     { BGPTYPE_ADVERTISERS,      "Advertisers"},
 164     { BGPTYPE_RCID_PATH,        "RCID Path / Cluster ID"},
 165     { BGPTYPE_MP_REACH_NLRI,    "Multi-Protocol Reach NLRI"},
 166     { BGPTYPE_MP_UNREACH_NLRI,  "Multi-Protocol Unreach NLRI"},
 167     { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
 168     { BGPTYPE_ATTR_SET,         "Attribute Set"},
 169     { 255,                      "Reserved for development"},
 170     { 0, NULL}
 171 };
 172
 173 #define BGP_AS_SET             1
 174 #define BGP_AS_SEQUENCE        2
 175 #define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
 176 #define BGP_CONFED_AS_SET      4 /* draft-ietf-idr-rfc3065bis-01  */
 177
 178 static struct tok bgp_as_path_segment_open_values[] = {
 179     { BGP_AS_SEQUENCE,         ""},
 180     { BGP_AS_SET,              "{ "},
 181     { BGP_CONFED_AS_SEQUENCE,  "( "},
 182     { BGP_CONFED_AS_SET,       "({ "},
 183     { 0, NULL}
 184 };
 185
 186 static struct tok bgp_as_path_segment_close_values[] = {
 187     { BGP_AS_SEQUENCE,         ""},
 188     { BGP_AS_SET,              "}"},
 189     { BGP_CONFED_AS_SEQUENCE,  ")"},
 190     { BGP_CONFED_AS_SET,       "})"},
 191     { 0, NULL}
 192 };
 193
 194 #define BGP_OPT_AUTH                    1
 195 #define BGP_OPT_CAP                     2
 196
 197
 198 static struct tok bgp_opt_values[] = {
 199     { BGP_OPT_AUTH,             "Authentication Information"},
 200     { BGP_OPT_CAP,              "Capabilities Advertisement"},
 201     { 0, NULL}
 202 };
 203
 204 #define BGP_CAPCODE_MP                  1
 205 #define BGP_CAPCODE_RR                  2
 206 #define BGP_CAPCODE_ORF                 3 /* XXX */
 207 #define BGP_CAPCODE_RESTART            64 /* draft-ietf-idr-restart-05  */
 208 #define BGP_CAPCODE_AS_NEW             65 /* XXX */
 209 #define BGP_CAPCODE_DYN_CAP            67 /* XXX */
 210 #define BGP_CAPCODE_RR_CISCO          128
 211
 212 static struct tok bgp_capcode_values[] = {
 213     { BGP_CAPCODE_MP,           "Multiprotocol Extensions"},
 214     { BGP_CAPCODE_RR,           "Route Refresh"},
 215     { BGP_CAPCODE_ORF,          "Cooperative Route Filtering"},
 216     { BGP_CAPCODE_RESTART,      "Graceful Restart"},
 217     { BGP_CAPCODE_AS_NEW,       "32-Bit AS Number"},
 218     { BGP_CAPCODE_DYN_CAP,      "Dynamic Capability"},
 219     { BGP_CAPCODE_RR_CISCO,     "Route Refresh (Cisco)"},
 220     { 0, NULL}
 221 };
 222
 223 #define BGP_NOTIFY_MAJOR_MSG            1
 224 #define BGP_NOTIFY_MAJOR_OPEN           2
 225 #define BGP_NOTIFY_MAJOR_UPDATE         3
 226 #define BGP_NOTIFY_MAJOR_HOLDTIME       4
 227 #define BGP_NOTIFY_MAJOR_FSM            5
 228 #define BGP_NOTIFY_MAJOR_CEASE          6
 229 #define BGP_NOTIFY_MAJOR_CAP            7
 230
 231 static struct tok bgp_notify_major_values[] = {
 232     { BGP_NOTIFY_MAJOR_MSG,     "Message Header Error"},
 233     { BGP_NOTIFY_MAJOR_OPEN,    "OPEN Message Error"},
 234     { BGP_NOTIFY_MAJOR_UPDATE,  "UPDATE Message Error"},
 235     { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
 236     { BGP_NOTIFY_MAJOR_FSM,     "Finite State Machine Error"},
 237     { BGP_NOTIFY_MAJOR_CEASE,   "Cease"},
 238     { BGP_NOTIFY_MAJOR_CAP,     "Capability Message Error"},
 239     { 0, NULL}
 240 };
 241
 242 /* draft-ietf-idr-cease-subcode-02 */
 243 #define BGP_NOTIFY_MINOR_CEASE_MAXPRFX  1
 244 static struct tok bgp_notify_minor_cease_values[] = {
 245     { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
 246     { 2,                        "Administratively Shutdown"},
 247     { 3,                        "Peer Unconfigured"},
 248     { 4,                        "Administratively Reset"},
 249     { 5,                        "Connection Rejected"},
 250     { 6,                        "Other Configuration Change"},
 251     { 7,                        "Connection Collision Resolution"},
 252     { 0, NULL}
 253 };
 254
 255 static struct tok bgp_notify_minor_msg_values[] = {
 256     { 1,                        "Connection Not Synchronized"},
 257     { 2,                        "Bad Message Length"},
 258     { 3,                        "Bad Message Type"},
 259     { 0, NULL}
 260 };
 261
 262 static struct tok bgp_notify_minor_open_values[] = {
 263     { 1,                        "Unsupported Version Number"},
 264     { 2,                        "Bad Peer AS"},
 265     { 3,                        "Bad BGP Identifier"},
 266     { 4,                        "Unsupported Optional Parameter"},
 267     { 5,                        "Authentication Failure"},
 268     { 6,                        "Unacceptable Hold Time"},
 269     { 0, NULL}
 270 };
 271
 272 static struct tok bgp_notify_minor_update_values[] = {
 273     { 1,                        "Malformed Attribute List"},
 274     { 2,                        "Unrecognized Well-known Attribute"},
 275     { 3,                        "Missing Well-known Attribute"},
 276     { 4,                        "Attribute Flags Error"},
 277     { 5,                        "Attribute Length Error"},
 278     { 6,                        "Invalid ORIGIN Attribute"},
 279     { 7,                        "AS Routing Loop"},
 280     { 8,                        "Invalid NEXT_HOP Attribute"},
 281     { 9,                        "Optional Attribute Error"},
 282     { 10,                       "Invalid Network Field"},
 283     { 11,                       "Malformed AS_PATH"},
 284     { 0, NULL}
 285 };
 286
 287 static struct tok bgp_notify_minor_cap_values[] = {
 288     { 1,                        "Invalid Action Value" },
 289     { 2,                        "Invalid Capability Length" },
 290     { 3,                        "Malformed Capability Value" },
 291     { 4,                        "Unsupported Capability Code" },
 292     { 0, NULL }
 293 };
 294
 295 static struct tok bgp_origin_values[] = {
 296     { 0,                        "IGP"},
 297     { 1,                        "EGP"},
 298     { 2,                        "Incomplete"},
 299     { 0, NULL}
 300 };
 301
 302 /* Subsequent address family identifier, RFC2283 section 7 */
 303 #define SAFNUM_RES                      0
 304 #define SAFNUM_UNICAST                  1
 305 #define SAFNUM_MULTICAST                2
 306 #define SAFNUM_UNIMULTICAST             3
 307 /* labeled BGP RFC3107 */
 308 #define SAFNUM_LABUNICAST               4
 309 #define SAFNUM_TUNNEL                   64 /* XXX */
 310 #define SAFNUM_VPLS                     65 /* XXX */
 311 #define SAFNUM_MDT                      66 /* XXX */
 312 /* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt  */
 313 #define SAFNUM_VPNUNICAST               128
 314 #define SAFNUM_VPNMULTICAST             129
 315 #define SAFNUM_VPNUNIMULTICAST          130
 316 /* draft-marques-ppvpn-rt-constrain-01.txt */
 317 #define SAFNUM_RT_ROUTING_INFO          132
 318
 319 #define BGP_VPN_RD_LEN                  8
 320
 321 static struct tok bgp_safi_values[] = {
 322     { SAFNUM_RES,               "Reserved"},
 323     { SAFNUM_UNICAST,           "Unicast"},
 324     { SAFNUM_MULTICAST,         "Multicast"},
 325     { SAFNUM_UNIMULTICAST,      "Unicast+Multicast"},
 326     { SAFNUM_LABUNICAST,        "labeled Unicast"},
 327     { SAFNUM_TUNNEL,            "Tunnel"},
 328     { SAFNUM_VPLS,              "VPLS"},
 329     { SAFNUM_MDT,               "MDT"},
 330     { SAFNUM_VPNUNICAST,        "labeled VPN Unicast"},
 331     { SAFNUM_VPNMULTICAST,      "labeled VPN Multicast"},
 332     { SAFNUM_VPNUNIMULTICAST,   "labeled VPN Unicast+Multicast"},
 333     { SAFNUM_RT_ROUTING_INFO,   "Route Target Routing Information"}, /* draft-marques-ppvpn-rt-constrain-01.txt */
 334     { 0, NULL }
 335 };
 336
 337 /* well-known community */
 338 #define BGP_COMMUNITY_NO_EXPORT                 0xffffff01
 339 #define BGP_COMMUNITY_NO_ADVERT                 0xffffff02
 340 #define BGP_COMMUNITY_NO_EXPORT_SUBCONFED       0xffffff03
 341
 342 /* RFC1700 address family numbers */
 343 #define AFNUM_INET      1
 344 #define AFNUM_INET6     2
 345 #define AFNUM_NSAP      3
 346 #define AFNUM_HDLC      4
 347 #define AFNUM_BBN1822   5
 348 #define AFNUM_802       6
 349 #define AFNUM_E163      7
 350 #define AFNUM_E164      8
 351 #define AFNUM_F69       9
 352 #define AFNUM_X121      10
 353 #define AFNUM_IPX       11
 354 #define AFNUM_ATALK     12
 355 #define AFNUM_DECNET    13
 356 #define AFNUM_BANYAN    14
 357 #define AFNUM_E164NSAP  15
 358 /* draft-kompella-ppvpn-l2vpn */
 359 #define AFNUM_L2VPN     196 /* still to be approved by IANA */
 360
 361 static struct tok bgp_afi_values[] = {
 362     { 0,                      "Reserved"},
 363     { AFNUM_INET,             "IPv4"},
 364     { AFNUM_INET6,            "IPv6"},
 365     { AFNUM_NSAP,             "NSAP"},
 366     { AFNUM_HDLC,             "HDLC"},
 367     { AFNUM_BBN1822,          "BBN 1822"},
 368     { AFNUM_802,              "802"},
 369     { AFNUM_E163,             "E.163"},
 370     { AFNUM_E164,             "E.164"},
 371     { AFNUM_F69,              "F.69"},
 372     { AFNUM_X121,             "X.121"},
 373     { AFNUM_IPX,              "Novell IPX"},
 374     { AFNUM_ATALK,            "Appletalk"},
 375     { AFNUM_DECNET,           "Decnet IV"},
 376     { AFNUM_BANYAN,           "Banyan Vines"},
 377     { AFNUM_E164NSAP,         "E.164 with NSAP subaddress"},
 378     { AFNUM_L2VPN,            "Layer-2 VPN"},
 379     { 0, NULL},
 380 };
 381
 382 /* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
 383 #define BGP_EXT_COM_RT_0        0x0002  /* Route Target,Format AS(2bytes):AN(4bytes) */
 384 #define BGP_EXT_COM_RT_1        0x0102  /* Route Target,Format IP address:AN(2bytes) */
 385 #define BGP_EXT_COM_RT_2        0x0202  /* Route Target,Format AN(4bytes):local(2bytes) */
 386 #define BGP_EXT_COM_RO_0        0x0003  /* Route Origin,Format AS(2bytes):AN(4bytes) */
 387 #define BGP_EXT_COM_RO_1        0x0103  /* Route Origin,Format IP address:AN(2bytes) */
 388 #define BGP_EXT_COM_RO_2        0x0203  /* Route Origin,Format AN(4bytes):local(2bytes) */
 389 #define BGP_EXT_COM_LINKBAND    0x4004  /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
 390                                         /* rfc2547 bgp-mpls-vpns */
 391 #define BGP_EXT_COM_CISCO_MCAST 0x0009  /* cisco proprietary */
 392
 393 #define BGP_EXT_COM_VPN_ORIGIN  0x0005  /* OSPF Domain ID / VPN of Origin  - draft-rosen-vpns-ospf-bgp-mpls */
 394 #define BGP_EXT_COM_VPN_ORIGIN2 0x0105  /* duplicate - keep for backwards compatability */
 395 #define BGP_EXT_COM_VPN_ORIGIN3 0x0205  /* duplicate - keep for backwards compatability */
 396 #define BGP_EXT_COM_VPN_ORIGIN4 0x8005  /* duplicate - keep for backwards compatability */
 397
 398 #define BGP_EXT_COM_OSPF_RTYPE  0x0306  /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
 399 #define BGP_EXT_COM_OSPF_RTYPE2 0x8000  /* duplicate - keep for backwards compatability */
 400
 401 #define BGP_EXT_COM_OSPF_RID    0x0107  /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
 402 #define BGP_EXT_COM_OSPF_RID2   0x8001  /* duplicate - keep for backwards compatability */
 403
 404 #define BGP_EXT_COM_L2INFO      0x800a  /* draft-kompella-ppvpn-l2vpn */
 405
 406 static struct tok bgp_extd_comm_flag_values[] = {
 407     { 0x8000,                  "vendor-specific"},
 408     { 0x4000,                  "non-transitive"},
 409     { 0, NULL},
 410 };
 411
 412 static struct tok bgp_extd_comm_subtype_values[] = {
 413     { BGP_EXT_COM_RT_0,        "target"},
 414     { BGP_EXT_COM_RT_1,        "target"},
 415     { BGP_EXT_COM_RT_2,        "target"},
 416     { BGP_EXT_COM_RO_0,        "origin"},
 417     { BGP_EXT_COM_RO_1,        "origin"},
 418     { BGP_EXT_COM_RO_2,        "origin"},
 419     { BGP_EXT_COM_LINKBAND,    "link-BW"},
 420     { BGP_EXT_COM_CISCO_MCAST, "mdt-group"},
 421     { BGP_EXT_COM_VPN_ORIGIN,  "ospf-domain"},
 422     { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
 423     { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
 424     { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
 425     { BGP_EXT_COM_OSPF_RTYPE,  "ospf-route-type"},
 426     { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
 427     { BGP_EXT_COM_OSPF_RID,    "ospf-router-id"},
 428     { BGP_EXT_COM_OSPF_RID2,   "ospf-router-id"},
 429     { BGP_EXT_COM_L2INFO,      "layer2-info"},
 430     { 0, NULL},
 431 };
 432
 433 /* OSPF codes for  BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls  */
 434 #define BGP_OSPF_RTYPE_RTR      1 /* OSPF Router LSA */
 435 #define BGP_OSPF_RTYPE_NET      2 /* OSPF Network LSA */
 436 #define BGP_OSPF_RTYPE_SUM      3 /* OSPF Summary LSA */
 437 #define BGP_OSPF_RTYPE_EXT      5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
 438 #define BGP_OSPF_RTYPE_NSSA     7 /* OSPF NSSA External*/
 439 #define BGP_OSPF_RTYPE_SHAM     129 /* OSPF-MPLS-VPN Sham link */
 440 #define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
 441
 442 static struct tok bgp_extd_comm_ospf_rtype_values[] = {
 443   { BGP_OSPF_RTYPE_RTR, "Router" },
 444   { BGP_OSPF_RTYPE_NET, "Network" },
 445   { BGP_OSPF_RTYPE_SUM, "Summary" },
 446   { BGP_OSPF_RTYPE_EXT, "External" },
 447   { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
 448   { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
 449   { 0, NULL },
 450 };
 451
 452 int
 453 decode_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];
 460         if (32 < plen)
 461                 return -1;
 462
 463         memset(&addr, 0, sizeof(addr));
 464         TCHECK2(pptr[1], (plen + 7) / 8);
 465         memcpy(&addr, &pptr[1], (plen + 7) / 8);
 466         if (plen % 8) {
 467                 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
 468                         ((0xff00 >> (plen % 8)) & 0xff);
 469         }
 470         snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
 471         return 1 + (plen + 7) / 8;
 472
 473 trunc:
 474         return -2;
 475 }
 476
 477 static int
 478 decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
 479 {
 480         struct in_addr addr;
 481         u_int plen;
 482
 483         TCHECK(pptr[0]);
 484         plen = pptr[0];   /* get prefix length */
 485
 486         /* this is one of the weirdnesses of rfc3107
 487            the label length (actually the label + COS bits)
 488            is added to the prefix length;
 489            we also do only read out just one label -
 490            there is no real application for advertisement of
 491            stacked labels in a a single BGP message
 492         */
 493
 494         plen-=24; /* adjust prefixlen - labellength */
 495
 496         if (32 < plen)
 497                 return -1;
 498
 499         memset(&addr, 0, sizeof(addr));
 500         TCHECK2(pptr[4], (plen + 7) / 8);
 501         memcpy(&addr, &pptr[4], (plen + 7) / 8);
 502         if (plen % 8) {
 503                 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
 504                         ((0xff00 >> (plen % 8)) & 0xff);
 505         }
 506         /* the label may get offsetted by 4 bits so lets shift it right */
 507         snprintf(buf, buflen, "%s/%d, label:%u %s",
 508                  getname((u_char *)&addr),
 509                  plen,
 510                  EXTRACT_24BITS(pptr+1)>>4,
 511                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 512
 513         return 4 + (plen + 7) / 8;
 514
 515 trunc:
 516         return -2;
 517 }
 518
 519 /* RDs and RTs share the same semantics
 520  * we use bgp_vpn_rd_print for
 521  * printing route targets inside a NLRI */
 522 char *
 523 bgp_vpn_rd_print (const u_char *pptr) {
 524
 525    /* allocate space for the largest possible string */
 526     static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
 527     char *pos = rd;
 528
 529     /* ok lets load the RD format */
 530     switch (EXTRACT_16BITS(pptr)) {
 531
 532         /* AS:IP-address fmt*/
 533     case 0:
 534         snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
 535             EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
 536         break;
 537         /* IP-address:AS fmt*/
 538
 539     case 1:
 540         snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
 541             *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
 542         break;
 543
 544         /* 4-byte-AS:number fmt*/
 545     case 2:
 546         snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (%u.%u.%u.%u:%u)",
 547             EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6),
 548             *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
 549         break;
 550     default:
 551         snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
 552         break;
 553     }
 554     pos += strlen(pos);
 555     *(pos) = '\0';
 556     return (rd);
 557 }
 558
 559 static int
 560 decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
 561 {
 562         u_int8_t route_target[8];
 563         u_int plen;
 564
 565         TCHECK(pptr[0]);
 566         plen = pptr[0];   /* get prefix length */
 567
 568         plen-=32; /* adjust prefix length */
 569
 570         if (0 < plen)
 571                 return -1;
 572
 573         memset(&route_target, 0, sizeof(route_target));
 574         TCHECK2(pptr[1], (plen + 7) / 8);
 575         memcpy(&route_target, &pptr[1], (plen + 7) / 8);
 576         if (plen % 8) {
 577                 ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
 578                         ((0xff00 >> (plen % 8)) & 0xff);
 579         }
 580         snprintf(buf, buflen, "origin AS: %u, route target %s",
 581                  EXTRACT_32BITS(pptr+1),
 582                  bgp_vpn_rd_print((u_char *)&route_target));
 583
 584         return 5 + (plen + 7) / 8;
 585
 586 trunc:
 587         return -2;
 588 }
 589
 590 static int
 591 decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
 592 {
 593         struct in_addr addr;
 594         u_int plen;
 595
 596         TCHECK(pptr[0]);
 597         plen = pptr[0];   /* get prefix length */
 598
 599         plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
 600
 601         if (32 < plen)
 602                 return -1;
 603
 604         memset(&addr, 0, sizeof(addr));
 605         TCHECK2(pptr[12], (plen + 7) / 8);
 606         memcpy(&addr, &pptr[12], (plen + 7) / 8);
 607         if (plen % 8) {
 608                 ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
 609                         ((0xff00 >> (plen % 8)) & 0xff);
 610         }
 611         /* the label may get offsetted by 4 bits so lets shift it right */
 612         snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
 613                  bgp_vpn_rd_print(pptr+4),
 614                  getname((u_char *)&addr),
 615                  plen,
 616                  EXTRACT_24BITS(pptr+1)>>4,
 617                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 618
 619         return 12 + (plen + 7) / 8;
 620
 621 trunc:
 622         return -2;
 623 }
 624
 625 static int
 626 decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
 627 {
 628         int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
 629
 630         TCHECK2(pptr[0], 2);
 631         plen=EXTRACT_16BITS(pptr);
 632         tlen=plen;
 633         pptr+=2;
 634         TCHECK2(pptr[0],15);
 635         strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
 636                         bgp_vpn_rd_print(pptr),
 637                         EXTRACT_16BITS(pptr+8),
 638                         EXTRACT_16BITS(pptr+10),
 639                         EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
 640         pptr+=15;
 641         tlen-=15;
 642
 643         /* ok now the variable part - lets read out TLVs*/
 644         while (tlen>0) {
 645             if (tlen < 3)
 646                 return -1;
 647             TCHECK2(pptr[0], 3);
 648             tlv_type=*pptr++;
 649             tlv_len=EXTRACT_16BITS(pptr);
 650             ttlv_len=tlv_len;
 651             pptr+=2;
 652
 653             switch(tlv_type) {
 654             case 1:
 655                 strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
 656                                  tlv_type,
 657                                  tlv_len);
 658                 ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
 659                 while (ttlv_len>0) {
 660                     TCHECK(pptr[0]);
 661                     strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
 662                     ttlv_len--;
 663                 }
 664                 break;
 665             default:
 666                 snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
 667                          tlv_type,
 668                          tlv_len);
 669                 break;
 670             }
 671             tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
 672         }
 673         return plen+2;
 674
 675 trunc:
 676         return -2;
 677 }
 678
 679 #ifdef INET6
 680 int
 681 decode_prefix6(const u_char *pd, char *buf, u_int buflen)
 682 {
 683         struct in6_addr addr;
 684         u_int plen;
 685
 686         TCHECK(pd[0]);
 687         plen = pd[0];
 688         if (128 < plen)
 689                 return -1;
 690
 691         memset(&addr, 0, sizeof(addr));
 692         TCHECK2(pd[1], (plen + 7) / 8);
 693         memcpy(&addr, &pd[1], (plen + 7) / 8);
 694         if (plen % 8) {
 695                 addr.s6_addr[(plen + 7) / 8 - 1] &=
 696                         ((0xff00 >> (plen % 8)) & 0xff);
 697         }
 698         snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
 699         return 1 + (plen + 7) / 8;
 700
 701 trunc:
 702         return -2;
 703 }
 704
 705 static int
 706 decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
 707 {
 708         struct in6_addr addr;
 709         u_int plen;
 710
 711         TCHECK(pptr[0]);
 712         plen = pptr[0]; /* get prefix length */
 713         plen-=24; /* adjust prefixlen - labellength */
 714
 715         if (128 < plen)
 716                 return -1;
 717
 718         memset(&addr, 0, sizeof(addr));
 719         TCHECK2(pptr[4], (plen + 7) / 8);
 720         memcpy(&addr, &pptr[4], (plen + 7) / 8);
 721         if (plen % 8) {
 722                 addr.s6_addr[(plen + 7) / 8 - 1] &=
 723                         ((0xff00 >> (plen % 8)) & 0xff);
 724         }
 725         /* the label may get offsetted by 4 bits so lets shift it right */
 726         snprintf(buf, buflen, "%s/%d, label:%u %s",
 727                  getname6((u_char *)&addr),
 728                  plen,
 729                  EXTRACT_24BITS(pptr+1)>>4,
 730                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 731
 732         return 4 + (plen + 7) / 8;
 733
 734 trunc:
 735         return -2;
 736 }
 737
 738 static int
 739 decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
 740 {
 741         struct in6_addr addr;
 742         u_int plen;
 743
 744         TCHECK(pptr[0]);
 745         plen = pptr[0];   /* get prefix length */
 746
 747         plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
 748
 749         if (128 < plen)
 750                 return -1;
 751
 752         memset(&addr, 0, sizeof(addr));
 753         TCHECK2(pptr[12], (plen + 7) / 8);
 754         memcpy(&addr, &pptr[12], (plen + 7) / 8);
 755         if (plen % 8) {
 756                 addr.s6_addr[(plen + 7) / 8 - 1] &=
 757                         ((0xff00 >> (plen % 8)) & 0xff);
 758         }
 759         /* the label may get offsetted by 4 bits so lets shift it right */
 760         snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
 761                  bgp_vpn_rd_print(pptr+4),
 762                  getname6((u_char *)&addr),
 763                  plen,
 764                  EXTRACT_24BITS(pptr+1)>>4,
 765                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 766
 767         return 12 + (plen + 7) / 8;
 768
 769 trunc:
 770         return -2;
 771 }
 772 #endif
 773
 774 static int
 775 decode_labeled_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
 776 {
 777         u_int8_t addr[19];
 778         u_int plen;
 779
 780         TCHECK(pptr[0]);
 781         plen = pptr[0]; /* get prefix length */
 782         plen-=24; /* adjust prefixlen - labellength */
 783
 784         if (152 < plen)
 785                 return -1;
 786
 787         memset(&addr, 0, sizeof(addr));
 788         TCHECK2(pptr[4], (plen + 7) / 8);
 789         memcpy(&addr, &pptr[4], (plen + 7) / 8);
 790         if (plen % 8) {
 791                 addr[(plen + 7) / 8 - 1] &=
 792                         ((0xff00 >> (plen % 8)) & 0xff);
 793         }
 794         /* the label may get offsetted by 4 bits so lets shift it right */
 795         snprintf(buf, buflen, "%s/%d, label:%u %s",
 796                  isonsap_string(addr,(plen + 7) / 8 - 1),
 797                  plen,
 798                  EXTRACT_24BITS(pptr+1)>>4,
 799                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 800
 801         return 4 + (plen + 7) / 8;
 802
 803 trunc:
 804         return -2;
 805 }
 806
 807 static int
 808 decode_labeled_vpn_clnp_prefix(const u_char *pptr, char *buf, u_int buflen)
 809 {
 810         u_int8_t addr[19];
 811         u_int plen;
 812
 813         TCHECK(pptr[0]);
 814         plen = pptr[0];   /* get prefix length */
 815
 816         plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
 817
 818         if (152 < plen)
 819                 return -1;
 820
 821         memset(&addr, 0, sizeof(addr));
 822         TCHECK2(pptr[12], (plen + 7) / 8);
 823         memcpy(&addr, &pptr[12], (plen + 7) / 8);
 824         if (plen % 8) {
 825                 addr[(plen + 7) / 8 - 1] &=
 826                         ((0xff00 >> (plen % 8)) & 0xff);
 827         }
 828         /* the label may get offsetted by 4 bits so lets shift it right */
 829         snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
 830                  bgp_vpn_rd_print(pptr+4),
 831                  isonsap_string(addr,(plen + 7) / 8 - 1),
 832                  plen,
 833                  EXTRACT_24BITS(pptr+1)>>4,
 834                  ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
 835
 836         return 12 + (plen + 7) / 8;
 837
 838 trunc:
 839         return -2;
 840 }
 841
 842 static int
 843 bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
 844 {
 845         int i;
 846         u_int16_t af;
 847         u_int8_t safi, snpa;
 848         union { /* copy buffer for bandwidth values */
 849             float f;
 850             u_int32_t i;
 851         } bw;
 852         int advance;
 853         int tlen;
 854         const u_char *tptr;
 855         char buf[MAXHOSTNAMELEN + 100];
 856         char tokbuf[TOKBUFSIZE];
 857
 858         tptr = pptr;
 859         tlen=len;
 860
 861         switch (attr->bgpa_type) {
 862         case BGPTYPE_ORIGIN:
 863                 if (len != 1)
 864                         printf("invalid len");
 865                 else {
 866                         TCHECK(*tptr);
 867                         printf("%s", tok2strbuf(bgp_origin_values,
 868                                                 "Unknown Origin Typecode",
 869                                                 tptr[0],
 870                                                 tokbuf, sizeof(tokbuf)));
 871                 }
 872                 break;
 873
 874         case BGPTYPE_AS_PATH:
 875                 if (len % 2) {
 876                         printf("invalid len");
 877                         break;
 878                 }
 879                 if (!len) {
 880                         printf("empty");
 881                         break;
 882                 }
 883
 884                 while (tptr < pptr + len) {
 885                         TCHECK(tptr[0]);
 886                         printf("%s", tok2strbuf(bgp_as_path_segment_open_values,
 887                                                 "?", tptr[0],
 888                                                 tokbuf, sizeof(tokbuf)));
 889                         for (i = 0; i < tptr[1] * 2; i += 2) {
 890                             TCHECK2(tptr[2 + i], 2);
 891                             printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
 892                         }
 893                         TCHECK(tptr[0]);
 894                         printf("%s", tok2strbuf(bgp_as_path_segment_close_values,
 895                                                 "?", tptr[0],
 896                                                 tokbuf, sizeof(tokbuf)));
 897                         TCHECK(tptr[1]);
 898                         tptr += 2 + tptr[1] * 2;
 899                 }
 900                 break;
 901         case BGPTYPE_NEXT_HOP:
 902                 if (len != 4)
 903                         printf("invalid len");
 904                 else {
 905                         TCHECK2(tptr[0], 4);
 906                         printf("%s", getname(tptr));
 907                 }
 908                 break;
 909         case BGPTYPE_MULTI_EXIT_DISC:
 910         case BGPTYPE_LOCAL_PREF:
 911                 if (len != 4)
 912                         printf("invalid len");
 913                 else {
 914                         TCHECK2(tptr[0], 4);
 915                         printf("%u", EXTRACT_32BITS(tptr));
 916                 }
 917                 break;
 918         case BGPTYPE_ATOMIC_AGGREGATE:
 919                 if (len != 0)
 920                         printf("invalid len");
 921                 break;
 922         case BGPTYPE_AGGREGATOR:
 923                 if (len != 6) {
 924                         printf("invalid len");
 925                         break;
 926                 }
 927                 TCHECK2(tptr[0], 6);
 928                 printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
 929                         getname(tptr + 2));
 930                 break;
 931         case BGPTYPE_COMMUNITIES:
 932                 if (len % 4) {
 933                         printf("invalid len");
 934                         break;
 935                 }
 936                 while (tlen>0) {
 937                         u_int32_t comm;
 938                         TCHECK2(tptr[0], 4);
 939                         comm = EXTRACT_32BITS(tptr);
 940                         switch (comm) {
 941                         case BGP_COMMUNITY_NO_EXPORT:
 942                                 printf(" NO_EXPORT");
 943                                 break;
 944                         case BGP_COMMUNITY_NO_ADVERT:
 945                                 printf(" NO_ADVERTISE");
 946                                 break;
 947                         case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
 948                                 printf(" NO_EXPORT_SUBCONFED");
 949                                 break;
 950                         default:
 951                                 printf("%u:%u%s",
 952                                        (comm >> 16) & 0xffff,
 953                                        comm & 0xffff,
 954                                        (tlen>4) ? ", " : "");
 955                                 break;
 956                         }
 957                         tlen -=4;
 958                         tptr +=4;
 959                 }
 960                 break;
 961         case BGPTYPE_ORIGINATOR_ID:
 962                 if (len != 4) {
 963                         printf("invalid len");
 964                         break;
 965                 }
 966                 TCHECK2(tptr[0], 4);
 967                 printf("%s",getname(tptr));
 968                 break;
 969         case BGPTYPE_CLUSTER_LIST:
 970                 if (len % 4) {
 971                         printf("invalid len");
 972                         break;
 973                 }
 974                 while (tlen>0) {
 975                         TCHECK2(tptr[0], 4);
 976                         printf("%s%s",
 977                                getname(tptr),
 978                                 (tlen>4) ? ", " : "");
 979                         tlen -=4;
 980                         tptr +=4;
 981                 }
 982                 break;
 983         case BGPTYPE_MP_REACH_NLRI:
 984                 TCHECK2(tptr[0], 3);
 985                 af = EXTRACT_16BITS(tptr);
 986                 safi = tptr[2];
 987
 988                 printf("\n\t    AFI: %s (%u), %sSAFI: %s (%u)",
 989                        tok2strbuf(bgp_afi_values, "Unknown AFI", af,
 990                                   tokbuf, sizeof(tokbuf)),
 991                        af,
 992                        (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
 993                        tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
 994                                   tokbuf, sizeof(tokbuf)),
 995                        safi);
 996
 997                 switch(af<<8 | safi) {
 998                 case (AFNUM_INET<<8 | SAFNUM_UNICAST):
 999                 case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1000                 case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1001                 case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1002                 case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1003                 case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1004                 case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1005                 case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1006 #ifdef INET6
1007                 case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1008                 case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1009                 case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1010                 case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1011                 case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1012                 case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1013                 case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1014                 case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1015 #endif
1016                 case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1017                 case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1018                 case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1019                 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1020                 case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1021                 case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1022                 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1023                 case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1024                 case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1025                     break;
1026                 default:
1027                     TCHECK2(tptr[0], tlen);
1028                     printf("\n\t    no AFI %u / SAFI %u decoder",af,safi);
1029                     if (vflag <= 1)
1030                         print_unknown_data(tptr,"\n\t    ",tlen);
1031                     goto done;
1032                     break;
1033                 }
1034
1035                 tptr +=3;
1036
1037                 TCHECK(tptr[0]);
1038                 tlen = tptr[0];
1039                 tptr++;
1040
1041                 if (tlen) {
1042                     printf("\n\t    nexthop: ");
1043                     while (tlen > 0) {
1044                         switch(af<<8 | safi) {
1045                         case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1046                         case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1047                         case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1048                         case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1049                         case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1050                             if (tlen < (int)sizeof(struct in_addr)) {
1051                                 printf("invalid len");
1052                                 tlen = 0;
1053                             } else {
1054                                 TCHECK2(tptr[0], sizeof(struct in_addr));
1055                                 printf("%s",getname(tptr));
1056                                 tlen -= sizeof(struct in_addr);
1057                                 tptr += sizeof(struct in_addr);
1058                             }
1059                             break;
1060                         case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1061                         case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1062                         case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1063                             if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
1064                                 printf("invalid len");
1065                                 tlen = 0;
1066                             } else {
1067                                 TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1068                                 printf("RD: %s, %s",
1069                                        bgp_vpn_rd_print(tptr),
1070                                        getname(tptr+BGP_VPN_RD_LEN));
1071                                 tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1072                                 tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
1073                             }
1074                             break;
1075 #ifdef INET6
1076                         case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1077                         case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1078                         case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1079                         case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1080                         case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1081                             if (tlen < (int)sizeof(struct in6_addr)) {
1082                                 printf("invalid len");
1083                                 tlen = 0;
1084                             } else {
1085                                 TCHECK2(tptr[0], sizeof(struct in6_addr));
1086                                 printf("%s", getname6(tptr));
1087                                 tlen -= sizeof(struct in6_addr);
1088                                 tptr += sizeof(struct in6_addr);
1089                             }
1090                             break;
1091                         case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1092                         case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1093                         case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1094                             if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
1095                                 printf("invalid len");
1096                                 tlen = 0;
1097                             } else {
1098                                 TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1099                                 printf("RD: %s, %s",
1100                                        bgp_vpn_rd_print(tptr),
1101                                        getname6(tptr+BGP_VPN_RD_LEN));
1102                                 tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1103                                 tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
1104                             }
1105                             break;
1106 #endif
1107                         case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1108                         case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1109                         case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1110                             if (tlen < (int)sizeof(struct in_addr)) {
1111                                 printf("invalid len");
1112                                 tlen = 0;
1113                             } else {
1114                                 TCHECK2(tptr[0], sizeof(struct in_addr));
1115                                 printf("%s", getname(tptr));
1116                                 tlen -= (sizeof(struct in_addr));
1117                                 tptr += (sizeof(struct in_addr));
1118                             }
1119                             break;
1120                         case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1121                         case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1122                         case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1123                             TCHECK2(tptr[0], tlen);
1124                             printf("%s",isonsap_string(tptr,tlen));
1125                             tptr += tlen;
1126                             tlen = 0;
1127                             break;
1128
1129                         case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1130                         case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1131                         case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1132                             if (tlen < BGP_VPN_RD_LEN+1) {
1133                                 printf("invalid len");
1134                                 tlen = 0;
1135                             } else {
1136                                 TCHECK2(tptr[0], tlen);
1137                                 printf("RD: %s, %s",
1138                                        bgp_vpn_rd_print(tptr),
1139                                        isonsap_string(tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
1140                                 /* rfc986 mapped IPv4 address ? */
1141                                 if (EXTRACT_32BITS(tptr+BGP_VPN_RD_LEN) ==  0x47000601)
1142                                     printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4));
1143 #ifdef INET6
1144                                 /* rfc1888 mapped IPv6 address ? */
1145                                 else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) ==  0x350000)
1146                                     printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3));
1147 #endif
1148                                 tptr += tlen;
1149                                 tlen = 0;
1150                             }
1151                             break;
1152                         default:
1153                             TCHECK2(tptr[0], tlen);
1154                             printf("no AFI %u/SAFI %u decoder",af,safi);
1155                             if (vflag <= 1)
1156                                 print_unknown_data(tptr,"\n\t    ",tlen);
1157                             tptr += tlen;
1158                             tlen = 0;
1159                             goto done;
1160                             break;
1161                         }
1162                     }
1163                 }
1164                 tptr += tlen;
1165
1166                 TCHECK(tptr[0]);
1167                 snpa = tptr[0];
1168                 tptr++;
1169
1170                 if (snpa) {
1171                         printf("\n\t    %u SNPA", snpa);
1172                         for (/*nothing*/; snpa > 0; snpa--) {
1173                                 TCHECK(tptr[0]);
1174                                 printf("\n\t      %d bytes", tptr[0]);
1175                                 tptr += tptr[0] + 1;
1176                         }
1177                 } else {
1178                         printf(", no SNPA");
1179                 }
1180
1181                 while (len - (tptr - pptr) > 0) {
1182                     switch (af<<8 | safi) {
1183                     case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1184                     case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1185                     case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1186                         advance = decode_prefix4(tptr, buf, sizeof(buf));
1187                         if (advance == -1)
1188                             printf("\n\t    (illegal prefix length)");
1189                         else if (advance == -2)
1190                             goto trunc;
1191                         else
1192                             printf("\n\t      %s", buf);
1193                         break;
1194                     case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1195                         advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1196                         if (advance == -1)
1197                             printf("\n\t    (illegal prefix length)");
1198                         else if (advance == -2)
1199                             goto trunc;
1200                         else
1201                             printf("\n\t      %s", buf);
1202                         break;
1203                     case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1204                     case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1205                     case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1206                         advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1207                         if (advance == -1)
1208                             printf("\n\t    (illegal prefix length)");
1209                         else if (advance == -2)
1210                             goto trunc;
1211                         else
1212                             printf("\n\t      %s", buf);
1213                         break;
1214                     case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
1215                         advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1216                         if (advance == -1)
1217                             printf("\n\t    (illegal prefix length)");
1218                         else if (advance == -2)
1219                             goto trunc;
1220                         else
1221                             printf("\n\t      %s", buf);
1222                         break;
1223 #ifdef INET6
1224                     case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1225                     case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1226                     case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1227                         advance = decode_prefix6(tptr, buf, sizeof(buf));
1228                         if (advance == -1)
1229                             printf("\n\t    (illegal prefix length)");
1230                         else if (advance == -2)
1231                             goto trunc;
1232                         else
1233                             printf("\n\t      %s", buf);
1234                         break;
1235                     case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1236                         advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1237                         if (advance == -1)
1238                             printf("\n\t    (illegal prefix length)");
1239                         else if (advance == -2)
1240                             goto trunc;
1241                         else
1242                             printf("\n\t      %s", buf);
1243                         break;
1244                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1245                     case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1246                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1247                         advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1248                         if (advance == -1)
1249                             printf("\n\t    (illegal prefix length)");
1250                         else if (advance == -2)
1251                             goto trunc;
1252                         else
1253                             printf("\n\t      %s", buf);
1254                         break;
1255                     case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO):
1256                         advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
1257                         if (advance == -1)
1258                             printf("\n\t    (illegal prefix length)");
1259                         else if (advance == -2)
1260                             goto trunc;
1261                         else
1262                             printf("\n\t      %s", buf);
1263                         break;
1264 #endif
1265                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1266                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1267                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1268                         advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1269                         if (advance == -1)
1270                             printf("\n\t    (illegal length)");
1271                         else if (advance == -2)
1272                             goto trunc;
1273                         else
1274                             printf("\n\t      %s", buf);
1275                         break;
1276                     case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1277                     case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1278                     case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1279                         advance = decode_labeled_clnp_prefix(tptr, buf, sizeof(buf));
1280                         if (advance == -1)
1281                             printf("\n\t    (illegal prefix length)");
1282                         else if (advance == -2)
1283                             goto trunc;
1284                         else
1285                             printf("\n\t      %s", buf);
1286                         break;
1287                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1288                     case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1289                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1290                         advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1291                         if (advance == -1)
1292                             printf("\n\t    (illegal prefix length)");
1293                         else if (advance == -2)
1294                             goto trunc;
1295                         else
1296                             printf("\n\t      %s", buf);
1297                         break;
1298                     default:
1299                         TCHECK2(*tptr,tlen);
1300                         printf("\n\t    no AFI %u / SAFI %u decoder",af,safi);
1301                         if (vflag <= 1)
1302                             print_unknown_data(tptr,"\n\t    ",tlen);
1303                         advance = 0;
1304                         tptr = pptr + len;
1305                         break;
1306                     }
1307                     if (advance < 0)
1308                         break;
1309                     tptr += advance;
1310                 }
1311         done:
1312                 break;
1313
1314         case BGPTYPE_MP_UNREACH_NLRI:
1315                 TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
1316                 af = EXTRACT_16BITS(tptr);
1317                 safi = tptr[2];
1318
1319                 printf("\n\t    AFI: %s (%u), %sSAFI: %s (%u)",
1320                        tok2strbuf(bgp_afi_values, "Unknown AFI", af,
1321                                   tokbuf, sizeof(tokbuf)),
1322                        af,
1323                        (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
1324                        tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
1325                                   tokbuf, sizeof(tokbuf)),
1326                        safi);
1327
1328                 if (len == BGP_MP_NLRI_MINSIZE)
1329                     printf("\n\t      End-of-Rib Marker (empty NLRI)");
1330
1331                 tptr += 3;
1332
1333                 while (len - (tptr - pptr) > 0) {
1334                     switch (af<<8 | safi) {
1335                     case (AFNUM_INET<<8 | SAFNUM_UNICAST):
1336                     case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
1337                     case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
1338                         advance = decode_prefix4(tptr, buf, sizeof(buf));
1339                         if (advance == -1)
1340                             printf("\n\t    (illegal prefix length)");
1341                         else if (advance == -2)
1342                             goto trunc;
1343                         else
1344                             printf("\n\t      %s", buf);
1345                         break;
1346                     case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
1347                         advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
1348                         if (advance == -1)
1349                             printf("\n\t    (illegal prefix length)");
1350                         else if (advance == -2)
1351                             goto trunc;
1352                         else
1353                             printf("\n\t      %s", buf);
1354                         break;
1355                     case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
1356                     case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
1357                     case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
1358                         advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
1359                         if (advance == -1)
1360                             printf("\n\t    (illegal prefix length)");
1361                         else if (advance == -2)
1362                             goto trunc;
1363                         else
1364                             printf("\n\t      %s", buf);
1365                         break;
1366 #ifdef INET6
1367                     case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
1368                     case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
1369                     case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
1370                         advance = decode_prefix6(tptr, buf, sizeof(buf));
1371                         if (advance == -1)
1372                             printf("\n\t    (illegal prefix length)");
1373                         else if (advance == -2)
1374                             goto trunc;
1375                         else
1376                             printf("\n\t      %s", buf);
1377                         break;
1378                     case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
1379                         advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
1380                         if (advance == -1)
1381                             printf("\n\t    (illegal prefix length)");
1382                         else if (advance == -2)
1383                             goto trunc;
1384                         else
1385                             printf("\n\t      %s", buf);
1386                         break;
1387                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
1388                     case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
1389                     case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
1390                         advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
1391                         if (advance == -1)
1392                             printf("\n\t    (illegal prefix length)");
1393                         else if (advance == -2)
1394                             goto trunc;
1395                         else
1396                             printf("\n\t      %s", buf);
1397                         break;
1398 #endif
1399                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
1400                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
1401                     case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
1402                         advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
1403                         if (advance == -1)
1404                             printf("\n\t    (illegal length)");
1405                         else if (advance == -2)
1406                             goto trunc;
1407                         else
1408                             printf("\n\t      %s", buf);
1409                         break;
1410                     case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
1411                     case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
1412                     case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
1413                         advance = decode_labeled_clnp_prefix(tptr, buf, sizeof(buf));
1414                         if (advance == -1)
1415                             printf("\n\t    (illegal prefix length)");
1416                         else if (advance == -2)
1417                             goto trunc;
1418                         else
1419                             printf("\n\t      %s", buf);
1420                         break;
1421                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
1422                     case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
1423                     case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
1424                         advance = decode_labeled_vpn_clnp_prefix(tptr, buf, sizeof(buf));
1425                         if (advance == -1)
1426                             printf("\n\t    (illegal prefix length)");
1427                         else if (advance == -2)
1428                             goto trunc;
1429                         else
1430                             printf("\n\t      %s", buf);
1431                         break;
1432                     default:
1433                         TCHECK2(*(tptr-3),tlen);
1434                         printf("no AFI %u / SAFI %u decoder",af,safi);
1435                         if (vflag <= 1)
1436                             print_unknown_data(tptr-3,"\n\t    ",tlen);
1437                         advance = 0;
1438                         tptr = pptr + len;
1439                         break;
1440                     }
1441                     if (advance < 0)
1442                         break;
1443                     tptr += advance;
1444                 }
1445                 break;
1446         case BGPTYPE_EXTD_COMMUNITIES:
1447                 if (len % 8) {
1448                         printf("invalid len");
1449                         break;
1450                 }
1451                 while (tlen>0) {
1452                     u_int16_t extd_comm;
1453
1454                     TCHECK2(tptr[0], 2);
1455                     extd_comm=EXTRACT_16BITS(tptr);
1456
1457                     printf("\n\t    %s (0x%04x), Flags [%s]",
1458                            tok2strbuf(bgp_extd_comm_subtype_values,
1459                                       "unknown extd community typecode",
1460                                       extd_comm, tokbuf, sizeof(tokbuf)),
1461                            extd_comm,
1462                            bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
1463
1464                     TCHECK2(*(tptr+2), 6);
1465                     switch(extd_comm) {
1466                     case BGP_EXT_COM_RT_0:
1467                     case BGP_EXT_COM_RO_0:
1468                         printf(": %u:%s",
1469                                EXTRACT_16BITS(tptr+2),
1470                                getname(tptr+4));
1471                         break;
1472                     case BGP_EXT_COM_RT_1:
1473                     case BGP_EXT_COM_RO_1:
1474                         printf(": %s:%u",
1475                                getname(tptr+2),
1476                                EXTRACT_16BITS(tptr+6));
1477                         break;
1478                     case BGP_EXT_COM_RT_2:
1479                     case BGP_EXT_COM_RO_2:
1480                         printf(": %u:%u",
1481                                EXTRACT_32BITS(tptr+2),
1482                                EXTRACT_16BITS(tptr+6));
1483                         break;
1484                     case BGP_EXT_COM_LINKBAND:
1485                         bw.i = EXTRACT_32BITS(tptr+2);
1486                         printf(": bandwidth: %.3f Mbps",
1487                                bw.f*8/1000000);
1488                         break;
1489                     case BGP_EXT_COM_CISCO_MCAST:
1490                         printf(": AS %u, group %s",
1491                                EXTRACT_16BITS(tptr+2),
1492                                getname(tptr+4));
1493                         break;
1494                     case BGP_EXT_COM_VPN_ORIGIN:
1495                     case BGP_EXT_COM_VPN_ORIGIN2:
1496                     case BGP_EXT_COM_VPN_ORIGIN3:
1497                     case BGP_EXT_COM_VPN_ORIGIN4:
1498                     case BGP_EXT_COM_OSPF_RID:
1499                     case BGP_EXT_COM_OSPF_RID2:
1500                         printf("%s", getname(tptr+2));
1501                         break;
1502                     case BGP_EXT_COM_OSPF_RTYPE:
1503                     case BGP_EXT_COM_OSPF_RTYPE2:
1504                         printf(": area:%s, router-type:%s, metric-type:%s%s",
1505                                getname(tptr+2),
1506                                tok2strbuf(bgp_extd_comm_ospf_rtype_values,
1507                                           "unknown (0x%02x)",
1508                                           *(tptr+6),
1509                                           tokbuf, sizeof(tokbuf)),
1510                                (*(tptr+7) &  BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
1511                                (*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
1512                         break;
1513                     case BGP_EXT_COM_L2INFO:
1514                         printf(": %s Control Flags [0x%02x]:MTU %u",
1515                                tok2strbuf(l2vpn_encaps_values,
1516                                           "unknown encaps",
1517                                           *(tptr+2),
1518                                           tokbuf, sizeof(tokbuf)),
1519                                        *(tptr+3),
1520                                EXTRACT_16BITS(tptr+4));
1521                         break;
1522                     default:
1523                         TCHECK2(*tptr,8);
1524                         print_unknown_data(tptr,"\n\t      ",8);
1525                         break;
1526                     }
1527                     tlen -=8;
1528                     tptr +=8;
1529                 }
1530                 break;
1531
1532         case BGPTYPE_ATTR_SET:
1533                 TCHECK2(tptr[0], 4);
1534                 printf("\n\t    Origin AS: %u", EXTRACT_32BITS(tptr));
1535                 tptr+=4;
1536                 len -=4;
1537
1538                 while (len >= 2 ) {
1539                     int alen;
1540                     struct bgp_attr bgpa;
1541
1542                     TCHECK2(tptr[0], sizeof(bgpa));
1543                     memcpy(&bgpa, tptr, sizeof(bgpa));
1544                     alen = bgp_attr_len(&bgpa);
1545                     tptr += bgp_attr_off(&bgpa);
1546                     len -= bgp_attr_off(&bgpa);
1547
1548                     printf("\n\t      %s (%u), length: %u",
1549                            tok2strbuf(bgp_attr_values,
1550                                       "Unknown Attribute", bgpa.bgpa_type,
1551                                       tokbuf, sizeof(tokbuf)),
1552                            bgpa.bgpa_type,
1553                            alen);
1554
1555                     if (bgpa.bgpa_flags) {
1556                         printf(", Flags [%s%s%s%s",
1557                                bgpa.bgpa_flags & 0x80 ? "O" : "",
1558                                bgpa.bgpa_flags & 0x40 ? "T" : "",
1559                                bgpa.bgpa_flags & 0x20 ? "P" : "",
1560                                bgpa.bgpa_flags & 0x10 ? "E" : "");
1561                         if (bgpa.bgpa_flags & 0xf)
1562                             printf("+%x", bgpa.bgpa_flags & 0xf);
1563                         printf("]: ");
1564                     }
1565                     /* FIXME check for recursion */
1566                     if (!bgp_attr_print(&bgpa, tptr, alen))
1567                         return 0;
1568                     tptr += alen;
1569                     len -= alen;
1570                 }
1571                 break;
1572
1573
1574         default:
1575             TCHECK2(*pptr,len);
1576             printf("\n\t    no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
1577             if (vflag <= 1)
1578                 print_unknown_data(pptr,"\n\t    ",len);
1579             break;
1580         }
1581         if (vflag > 1 && len) { /* omit zero length attributes*/
1582             TCHECK2(*pptr,len);
1583             print_unknown_data(pptr,"\n\t    ",len);
1584         }
1585         return 1;
1586
1587 trunc:
1588         return 0;
1589 }
1590
1591 static void
1592 bgp_open_print(const u_char *dat, int length)
1593 {
1594         struct bgp_open bgpo;
1595         struct bgp_opt bgpopt;
1596         const u_char *opt;
1597         int i,cap_type,cap_len,tcap_len,cap_offset;
1598         char tokbuf[TOKBUFSIZE];
1599         char tokbuf2[TOKBUFSIZE];
1600
1601         TCHECK2(dat[0], BGP_OPEN_SIZE);
1602         memcpy(&bgpo, dat, BGP_OPEN_SIZE);
1603
1604         printf("\n\t  Version %d, ", bgpo.bgpo_version);
1605         printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
1606         printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
1607         printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
1608         printf("\n\t  Optional parameters, length: %u", bgpo.bgpo_optlen);
1609
1610         /* some little sanity checking */
1611         if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
1612             return;
1613
1614         /* ugly! */
1615         opt = &((const struct bgp_open *)dat)->bgpo_optlen;
1616         opt++;
1617
1618         i = 0;
1619         while (i < bgpo.bgpo_optlen) {
1620                 TCHECK2(opt[i], BGP_OPT_SIZE);
1621                 memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
1622                 if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
1623                         printf("\n\t     Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
1624                         break;
1625                 }
1626
1627                 printf("\n\t    Option %s (%u), length: %u",
1628                        tok2strbuf(bgp_opt_values,"Unknown",
1629                                   bgpopt.bgpopt_type,
1630                                   tokbuf, sizeof(tokbuf)),
1631                        bgpopt.bgpopt_type,
1632                        bgpopt.bgpopt_len);
1633
1634                 /* now lets decode the options we know*/
1635                 switch(bgpopt.bgpopt_type) {
1636                 case BGP_OPT_CAP:
1637                     cap_type=opt[i+BGP_OPT_SIZE];
1638                     cap_len=opt[i+BGP_OPT_SIZE+1];
1639                     tcap_len=cap_len;
1640                     printf("\n\t      %s (%u), length: %u",
1641                            tok2strbuf(bgp_capcode_values, "Unknown",
1642                                       cap_type, tokbuf, sizeof(tokbuf)),
1643                            cap_type,
1644                            cap_len);
1645                     switch(cap_type) {
1646                     case BGP_CAPCODE_MP:
1647                         printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
1648                                tok2strbuf(bgp_afi_values, "Unknown",
1649                                           EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1650                                           tokbuf, sizeof(tokbuf)),
1651                                EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
1652                                tok2strbuf(bgp_safi_values, "Unknown",
1653                                           opt[i+BGP_OPT_SIZE+5],
1654                                           tokbuf, sizeof(tokbuf)),
1655                                opt[i+BGP_OPT_SIZE+5]);
1656                         break;
1657                     case BGP_CAPCODE_RESTART:
1658                         printf("\n\t\tRestart Flags: [%s], Restart Time %us",
1659                                ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
1660                                EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
1661                         tcap_len-=2;
1662                         cap_offset=4;
1663                         while(tcap_len>=4) {
1664                             printf("\n\t\t  AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
1665                                    tok2strbuf(bgp_afi_values,"Unknown",
1666                                               EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1667                                               tokbuf, sizeof(tokbuf)),
1668                                    EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
1669                                    tok2strbuf(bgp_safi_values,"Unknown",
1670                                               opt[i+BGP_OPT_SIZE+cap_offset+2],
1671                                               tokbuf2, sizeof(tokbuf2)),
1672                                    opt[i+BGP_OPT_SIZE+cap_offset+2],
1673                                    ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
1674                             tcap_len-=4;
1675                             cap_offset+=4;
1676                         }
1677                         break;
1678                     case BGP_CAPCODE_RR:
1679                     case BGP_CAPCODE_RR_CISCO:
1680                         break;
1681                     default:
1682                         TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1683                         printf("\n\t\tno decoder for Capability %u",
1684                                cap_type);
1685                         if (vflag <= 1)
1686                             print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1687                         break;
1688                     }
1689                     if (vflag > 1) {
1690                         TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len);
1691                         print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
1692                     }
1693                     break;
1694                 case BGP_OPT_AUTH:
1695                 default:
1696                        printf("\n\t      no decoder for option %u",
1697                            bgpopt.bgpopt_type);
1698                        break;
1699                 }
1700
1701                 i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
1702         }
1703         return;
1704 trunc:
1705         printf("[|BGP]");
1706 }
1707
1708 static void
1709 bgp_update_print(const u_char *dat, int length)
1710 {
1711         struct bgp bgp;
1712         struct bgp_attr bgpa;
1713         const u_char *p;
1714         int len;
1715         int i;
1716         char tokbuf[TOKBUFSIZE];
1717
1718         TCHECK2(dat[0], BGP_SIZE);
1719         memcpy(&bgp, dat, BGP_SIZE);
1720         p = dat + BGP_SIZE;     /*XXX*/
1721
1722         /* Unfeasible routes */
1723         len = EXTRACT_16BITS(p);
1724         if (len) {
1725                 /*
1726                  * Without keeping state from the original NLRI message,
1727                  * it's not possible to tell if this a v4 or v6 route,
1728                  * so only try to decode it if we're not v6 enabled.
1729                  */
1730 #ifdef INET6
1731                 printf("\n\t  Withdrawn routes: %d bytes", len);
1732 #else
1733                 char buf[MAXHOSTNAMELEN + 100];
1734                 int wpfx;
1735
1736                 TCHECK2(p[2], len);
1737                 i = 2;
1738
1739                 printf("\n\t  Withdrawn routes:");
1740
1741                 while(i < 2 + len) {
1742                         wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
1743                         if (wpfx == -1) {
1744                                 printf("\n\t    (illegal prefix length)");
1745                                 break;
1746                         } else if (wpfx == -2)
1747                                 goto trunc;
1748                         else {
1749                                 i += wpfx;
1750                                 printf("\n\t    %s", buf);
1751                         }
1752                 }
1753 #endif
1754         }
1755         p += 2 + len;
1756
1757         TCHECK2(p[0], 2);
1758         len = EXTRACT_16BITS(p);
1759
1760         if (len == 0 && length == BGP_UPDATE_MINSIZE) {
1761             printf("\n\t  End-of-Rib Marker (empty NLRI)");
1762             return;
1763         }
1764
1765         if (len) {
1766                 /* do something more useful!*/
1767                 i = 2;
1768                 while (i < 2 + len) {
1769                         int alen, aoff;
1770
1771                         TCHECK2(p[i], sizeof(bgpa));
1772                         memcpy(&bgpa, &p[i], sizeof(bgpa));
1773                         alen = bgp_attr_len(&bgpa);
1774                         aoff = bgp_attr_off(&bgpa);
1775
1776                        printf("\n\t  %s (%u), length: %u",
1777                               tok2strbuf(bgp_attr_values, "Unknown Attribute",
1778                                          bgpa.bgpa_type,
1779                                          tokbuf, sizeof(tokbuf)),
1780                               bgpa.bgpa_type,
1781                               alen);
1782
1783                         if (bgpa.bgpa_flags) {
1784                                 printf(", Flags [%s%s%s%s",
1785                                         bgpa.bgpa_flags & 0x80 ? "O" : "",
1786                                         bgpa.bgpa_flags & 0x40 ? "T" : "",
1787                                         bgpa.bgpa_flags & 0x20 ? "P" : "",
1788                                         bgpa.bgpa_flags & 0x10 ? "E" : "");
1789                                 if (bgpa.bgpa_flags & 0xf)
1790                                         printf("+%x", bgpa.bgpa_flags & 0xf);
1791                                 printf("]: ");
1792                         }
1793                         if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
1794                                 goto trunc;
1795                         i += aoff + alen;
1796                 }
1797         }
1798         p += 2 + len;
1799
1800         if (dat + length > p) {
1801                 printf("\n\t  Updated routes:");
1802                 while (dat + length > p) {
1803                         char buf[MAXHOSTNAMELEN + 100];
1804                         i = decode_prefix4(p, buf, sizeof(buf));
1805                         if (i == -1) {
1806                                 printf("\n\t    (illegal prefix length)");
1807                                 break;
1808                         } else if (i == -2)
1809                                 goto trunc;
1810                         else {
1811                                 printf("\n\t    %s", buf);
1812                                 p += i;
1813                         }
1814                 }
1815         }
1816         return;
1817 trunc:
1818         printf("[|BGP]");
1819 }
1820
1821 static void
1822 bgp_notification_print(const u_char *dat, int length)
1823 {
1824         struct bgp_notification bgpn;
1825         const u_char *tptr;
1826         char tokbuf[TOKBUFSIZE];
1827         char tokbuf2[TOKBUFSIZE];
1828
1829         TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
1830         memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
1831
1832         /* some little sanity checking */
1833         if (length<BGP_NOTIFICATION_SIZE)
1834             return;
1835
1836         printf(", %s (%u)",
1837                tok2strbuf(bgp_notify_major_values, "Unknown Error",
1838                           bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
1839                bgpn.bgpn_major);
1840
1841         switch (bgpn.bgpn_major) {
1842
1843         case BGP_NOTIFY_MAJOR_MSG:
1844             printf(", subcode %s (%u)",
1845                    tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
1846                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1847                    bgpn.bgpn_minor);
1848             break;
1849         case BGP_NOTIFY_MAJOR_OPEN:
1850             printf(", subcode %s (%u)",
1851                    tok2strbuf(bgp_notify_minor_open_values, "Unknown",
1852                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1853                    bgpn.bgpn_minor);
1854             break;
1855         case BGP_NOTIFY_MAJOR_UPDATE:
1856             printf(", subcode %s (%u)",
1857                    tok2strbuf(bgp_notify_minor_update_values, "Unknown",
1858                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1859                    bgpn.bgpn_minor);
1860             break;
1861         case BGP_NOTIFY_MAJOR_CAP:
1862             printf(" subcode %s (%u)",
1863                    tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
1864                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1865                    bgpn.bgpn_minor);
1866         case BGP_NOTIFY_MAJOR_CEASE:
1867             printf(", subcode %s (%u)",
1868                    tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
1869                               bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
1870                    bgpn.bgpn_minor);
1871
1872             /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
1873              * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
1874              */
1875             if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
1876                 tptr = dat + BGP_NOTIFICATION_SIZE;
1877                 TCHECK2(*tptr, 7);
1878                 printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
1879                        tok2strbuf(bgp_afi_values, "Unknown",
1880                                   EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
1881                        EXTRACT_16BITS(tptr),
1882                        tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
1883                                   tokbuf2, sizeof(tokbuf)),
1884                        *(tptr+2),
1885                        EXTRACT_32BITS(tptr+3));
1886             }
1887             break;
1888         default:
1889             break;
1890         }
1891
1892         return;
1893 trunc:
1894         printf("[|BGP]");
1895 }
1896
1897 static void
1898 bgp_route_refresh_print(const u_char *pptr, int len) {
1899
1900         const struct bgp_route_refresh *bgp_route_refresh_header;
1901         char tokbuf[TOKBUFSIZE];
1902         char tokbuf2[TOKBUFSIZE];
1903
1904         TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
1905
1906         /* some little sanity checking */
1907         if (len<BGP_ROUTE_REFRESH_SIZE)
1908             return;
1909
1910         bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
1911
1912         printf("\n\t  AFI %s (%u), SAFI %s (%u)",
1913                tok2strbuf(bgp_afi_values,"Unknown",
1914                           /* this stinks but the compiler pads the structure
1915                            * weird */
1916                           EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1917                           tokbuf, sizeof(tokbuf)),
1918                EXTRACT_16BITS(&bgp_route_refresh_header->afi),
1919                tok2strbuf(bgp_safi_values,"Unknown",
1920                           bgp_route_refresh_header->safi,
1921                           tokbuf2, sizeof(tokbuf2)),
1922                bgp_route_refresh_header->safi);
1923
1924         if (vflag > 1) {
1925             TCHECK2(*pptr, len);
1926             print_unknown_data(pptr,"\n\t  ", len);
1927         }
1928
1929         return;
1930 trunc:
1931         printf("[|BGP]");
1932 }
1933
1934 static int
1935 bgp_header_print(const u_char *dat, int length)
1936 {
1937         struct bgp bgp;
1938         char tokbuf[TOKBUFSIZE];
1939
1940         TCHECK2(dat[0], BGP_SIZE);
1941         memcpy(&bgp, dat, BGP_SIZE);
1942         printf("\n\t%s Message (%u), length: %u",
1943                tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
1944                           tokbuf, sizeof(tokbuf)),
1945                bgp.bgp_type,
1946                length);
1947
1948         switch (bgp.bgp_type) {
1949         case BGP_OPEN:
1950                 bgp_open_print(dat, length);
1951                 break;
1952         case BGP_UPDATE:
1953                 bgp_update_print(dat, length);
1954                 break;
1955         case BGP_NOTIFICATION:
1956                 bgp_notification_print(dat, length);
1957                 break;
1958         case BGP_KEEPALIVE:
1959                 break;
1960         case BGP_ROUTE_REFRESH:
1961                 bgp_route_refresh_print(dat, length);
1962                 break;
1963         default:
1964                 /* we have no decoder for the BGP message */
1965                 TCHECK2(*dat, length);
1966                 printf("\n\t  no Message %u decoder",bgp.bgp_type);
1967                 print_unknown_data(dat,"\n\t  ",length);
1968                 break;
1969         }
1970         return 1;
1971 trunc:
1972         printf("[|BGP]");
1973         return 0;
1974 }
1975
1976 void
1977 bgp_print(const u_char *dat, int length)
1978 {
1979         const u_char *p;
1980         const u_char *ep;
1981         const u_char *start;
1982         const u_char marker[] = {
1983                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1984                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
1985         };
1986         struct bgp bgp;
1987         u_int16_t hlen;
1988         char tokbuf[TOKBUFSIZE];
1989
1990         ep = dat + length;
1991         if (snapend < dat + length)
1992                 ep = snapend;
1993
1994         printf(": BGP, length: %u",length);
1995
1996         if (vflag < 1) /* lets be less chatty */
1997                 return;
1998
1999         p = dat;
2000         start = p;
2001         while (p < ep) {
2002                 if (!TTEST2(p[0], 1))
2003                         break;
2004                 if (p[0] != 0xff) {
2005                         p++;
2006                         continue;
2007                 }
2008
2009                 if (!TTEST2(p[0], sizeof(marker)))
2010                         break;
2011                 if (memcmp(p, marker, sizeof(marker)) != 0) {
2012                         p++;
2013                         continue;
2014                 }
2015
2016                 /* found BGP header */
2017                 TCHECK2(p[0], BGP_SIZE);        /*XXX*/
2018                 memcpy(&bgp, p, BGP_SIZE);
2019
2020                 if (start != p)
2021                         printf(" [|BGP]");
2022
2023                 hlen = ntohs(bgp.bgp_len);
2024                 if (hlen < BGP_SIZE) {
2025                         printf("\n[|BGP Bogus header length %u < %u]", hlen,
2026                             BGP_SIZE);
2027                         break;
2028                 }
2029
2030                 if (TTEST2(p[0], hlen)) {
2031                         if (!bgp_header_print(p, hlen))
2032                                 return;
2033                         p += hlen;
2034                         start = p;
2035                 } else {
2036                         printf("\n[|BGP %s]",
2037                                tok2strbuf(bgp_msg_values,
2038                                           "Unknown Message Type",
2039                                           bgp.bgp_type,
2040                                           tokbuf, sizeof(tokbuf)));
2041                         break;
2042                 }
2043         }
2044
2045         return;
2046
2047 trunc:
2048         printf(" [|BGP]");
2049 }