34aa7985eca8dbe08438380ae69afede099e4b5c
[dragonfly.git] / 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 }