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718e3744 | 1 | /* BGP open message handling |
896014f4 DL |
2 | * Copyright (C) 1998, 1999 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "linklist.h" | |
24 | #include "prefix.h" | |
25 | #include "stream.h" | |
26 | #include "thread.h" | |
27 | #include "log.h" | |
28 | #include "command.h" | |
6d58272b | 29 | #include "memory.h" |
3f9c7369 | 30 | #include "queue.h" |
039f3a34 | 31 | #include "filter.h" |
718e3744 | 32 | |
856ca177 | 33 | #include "lib/json.h" |
718e3744 | 34 | #include "bgpd/bgpd.h" |
35 | #include "bgpd/bgp_attr.h" | |
36 | #include "bgpd/bgp_debug.h" | |
37 | #include "bgpd/bgp_fsm.h" | |
38 | #include "bgpd/bgp_packet.h" | |
39 | #include "bgpd/bgp_open.h" | |
0b2aa3a0 | 40 | #include "bgpd/bgp_aspath.h" |
538621f2 | 41 | #include "bgpd/bgp_vty.h" |
4a1ab8e4 | 42 | #include "bgpd/bgp_memory.h" |
538621f2 | 43 | |
718e3744 | 44 | /* BGP-4 Multiprotocol Extentions lead us to the complex world. We can |
45 | negotiate remote peer supports extentions or not. But if | |
46 | remote-peer doesn't supports negotiation process itself. We would | |
47 | like to do manual configuration. | |
48 | ||
49 | So there is many configurable point. First of all we want set each | |
50 | peer whether we send capability negotiation to the peer or not. | |
51 | Next, if we send capability to the peer we want to set my capabilty | |
52 | inforation at each peer. */ | |
53 | ||
d62a17ae | 54 | void bgp_capability_vty_out(struct vty *vty, struct peer *peer, u_char use_json, |
55 | json_object *json_neigh) | |
718e3744 | 56 | { |
d62a17ae | 57 | char *pnt; |
58 | char *end; | |
59 | struct capability_mp_data mpc; | |
60 | struct capability_header *hdr; | |
61 | json_object *json_cap = NULL; | |
62 | ||
63 | if (use_json) | |
64 | json_cap = json_object_new_object(); | |
65 | ||
66 | pnt = peer->notify.data; | |
67 | end = pnt + peer->notify.length; | |
68 | ||
69 | while (pnt < end) { | |
70 | if (pnt + sizeof(struct capability_mp_data) + 2 > end) | |
71 | return; | |
72 | ||
73 | hdr = (struct capability_header *)pnt; | |
74 | if (pnt + hdr->length + 2 > end) | |
75 | return; | |
76 | ||
77 | memcpy(&mpc, pnt + 2, sizeof(struct capability_mp_data)); | |
78 | ||
79 | if (hdr->code == CAPABILITY_CODE_MP) { | |
80 | afi_t afi; | |
81 | safi_t safi; | |
82 | ||
83 | bgp_map_afi_safi_iana2int(ntohs(mpc.afi), mpc.safi, | |
84 | &afi, &safi); | |
85 | if (use_json) { | |
86 | switch (afi) { | |
87 | case AFI_IP: | |
88 | json_object_string_add( | |
89 | json_cap, | |
90 | "capabilityErrorMultiProtocolAfi", | |
91 | "IPv4"); | |
92 | break; | |
93 | case AFI_IP6: | |
94 | json_object_string_add( | |
95 | json_cap, | |
96 | "capabilityErrorMultiProtocolAfi", | |
97 | "IPv6"); | |
98 | break; | |
99 | case AFI_L2VPN: | |
100 | json_object_string_add( | |
101 | json_cap, | |
102 | "capabilityErrorMultiProtocolAfi", | |
103 | "L2VPN"); | |
104 | break; | |
105 | default: | |
106 | json_object_int_add( | |
107 | json_cap, | |
108 | "capabilityErrorMultiProtocolAfiUnknown", | |
109 | ntohs(mpc.afi)); | |
110 | break; | |
111 | } | |
112 | switch (safi) { | |
113 | case SAFI_UNICAST: | |
114 | json_object_string_add( | |
115 | json_cap, | |
116 | "capabilityErrorMultiProtocolSafi", | |
117 | "unicast"); | |
118 | break; | |
119 | case SAFI_MULTICAST: | |
120 | json_object_string_add( | |
121 | json_cap, | |
122 | "capabilityErrorMultiProtocolSafi", | |
123 | "multicast"); | |
124 | break; | |
125 | case SAFI_LABELED_UNICAST: | |
126 | json_object_string_add( | |
127 | json_cap, | |
128 | "capabilityErrorMultiProtocolSafi", | |
129 | "labeled-unicast"); | |
130 | break; | |
131 | case SAFI_MPLS_VPN: | |
132 | json_object_string_add( | |
133 | json_cap, | |
134 | "capabilityErrorMultiProtocolSafi", | |
135 | "MPLS-labeled VPN"); | |
136 | break; | |
137 | case SAFI_ENCAP: | |
138 | json_object_string_add( | |
139 | json_cap, | |
140 | "capabilityErrorMultiProtocolSafi", | |
141 | "encap"); | |
142 | break; | |
143 | case SAFI_EVPN: | |
144 | json_object_string_add( | |
145 | json_cap, | |
146 | "capabilityErrorMultiProtocolSafi", | |
147 | "EVPN"); | |
148 | break; | |
149 | default: | |
150 | json_object_int_add( | |
151 | json_cap, | |
152 | "capabilityErrorMultiProtocolSafiUnknown", | |
153 | mpc.safi); | |
154 | break; | |
155 | } | |
156 | } else { | |
157 | vty_out(vty, | |
158 | " Capability error for: Multi protocol "); | |
159 | switch (afi) { | |
160 | case AFI_IP: | |
161 | vty_out(vty, "AFI IPv4, "); | |
162 | break; | |
163 | case AFI_IP6: | |
164 | vty_out(vty, "AFI IPv6, "); | |
165 | break; | |
166 | case AFI_L2VPN: | |
167 | vty_out(vty, "AFI L2VPN, "); | |
168 | break; | |
169 | default: | |
170 | vty_out(vty, "AFI Unknown %d, ", | |
171 | ntohs(mpc.afi)); | |
172 | break; | |
173 | } | |
174 | switch (safi) { | |
175 | case SAFI_UNICAST: | |
176 | vty_out(vty, "SAFI Unicast"); | |
177 | break; | |
178 | case SAFI_MULTICAST: | |
179 | vty_out(vty, "SAFI Multicast"); | |
180 | break; | |
181 | case SAFI_LABELED_UNICAST: | |
182 | vty_out(vty, "SAFI Labeled-unicast"); | |
183 | break; | |
184 | case SAFI_MPLS_VPN: | |
185 | vty_out(vty, "SAFI MPLS-labeled VPN"); | |
186 | break; | |
187 | case SAFI_ENCAP: | |
188 | vty_out(vty, "SAFI ENCAP"); | |
189 | break; | |
190 | case SAFI_EVPN: | |
191 | vty_out(vty, "SAFI EVPN"); | |
192 | break; | |
193 | default: | |
194 | vty_out(vty, "SAFI Unknown %d ", | |
195 | mpc.safi); | |
196 | break; | |
197 | } | |
198 | vty_out(vty, "\n"); | |
199 | } | |
200 | } else if (hdr->code >= 128) { | |
201 | if (use_json) | |
202 | json_object_int_add( | |
203 | json_cap, | |
204 | "capabilityErrorVendorSpecificCapabilityCode", | |
205 | hdr->code); | |
206 | else | |
207 | vty_out(vty, | |
208 | " Capability error: vendor specific capability code %d", | |
209 | hdr->code); | |
210 | } else { | |
211 | if (use_json) | |
212 | json_object_int_add( | |
213 | json_cap, | |
214 | "capabilityErrorUnknownCapabilityCode", | |
215 | hdr->code); | |
216 | else | |
217 | vty_out(vty, | |
218 | " Capability error: unknown capability code %d", | |
219 | hdr->code); | |
220 | } | |
221 | pnt += hdr->length + 2; | |
222 | } | |
223 | if (use_json) | |
224 | json_object_object_add(json_neigh, "capabilityErrors", | |
225 | json_cap); | |
718e3744 | 226 | } |
227 | ||
d62a17ae | 228 | static void bgp_capability_mp_data(struct stream *s, |
229 | struct capability_mp_data *mpc) | |
718e3744 | 230 | { |
d62a17ae | 231 | mpc->afi = stream_getw(s); |
232 | mpc->reserved = stream_getc(s); | |
233 | mpc->safi = stream_getc(s); | |
6d58272b | 234 | } |
718e3744 | 235 | |
6d58272b | 236 | /* Set negotiated capability value. */ |
d62a17ae | 237 | static int bgp_capability_mp(struct peer *peer, struct capability_header *hdr) |
6d58272b | 238 | { |
d62a17ae | 239 | struct capability_mp_data mpc; |
240 | struct stream *s = BGP_INPUT(peer); | |
241 | afi_t afi; | |
242 | safi_t safi; | |
243 | ||
244 | /* Verify length is 4 */ | |
245 | if (hdr->length != 4) { | |
246 | zlog_warn( | |
247 | "MP Cap: Received invalid length %d, non-multiple of 4", | |
248 | hdr->length); | |
249 | return -1; | |
250 | } | |
251 | ||
252 | bgp_capability_mp_data(s, &mpc); | |
253 | ||
254 | if (bgp_debug_neighbor_events(peer)) | |
255 | zlog_debug("%s OPEN has MP_EXT CAP for afi/safi: %u/%u", | |
256 | peer->host, mpc.afi, mpc.safi); | |
257 | ||
258 | /* Convert AFI, SAFI to internal values, check. */ | |
259 | if (bgp_map_afi_safi_iana2int(mpc.afi, mpc.safi, &afi, &safi)) | |
260 | return -1; | |
261 | ||
262 | /* Now safi remapped, and afi/safi are valid array indices */ | |
263 | peer->afc_recv[afi][safi] = 1; | |
264 | ||
265 | if (peer->afc[afi][safi]) | |
266 | peer->afc_nego[afi][safi] = 1; | |
267 | else | |
268 | return -1; | |
269 | ||
270 | return 0; | |
718e3744 | 271 | } |
272 | ||
d62a17ae | 273 | static void bgp_capability_orf_not_support(struct peer *peer, iana_afi_t afi, |
274 | safi_t safi, u_char type, | |
275 | u_char mode) | |
718e3744 | 276 | { |
d62a17ae | 277 | if (bgp_debug_neighbor_events(peer)) |
278 | zlog_debug( | |
279 | "%s Addr-family %d/%d has ORF type/mode %d/%d not supported", | |
280 | peer->host, afi, safi, type, mode); | |
718e3744 | 281 | } |
282 | ||
d62a17ae | 283 | static const struct message orf_type_str[] = { |
284 | {ORF_TYPE_PREFIX, "Prefixlist"}, | |
285 | {ORF_TYPE_PREFIX_OLD, "Prefixlist (old)"}, | |
286 | {0}}; | |
6d58272b | 287 | |
d62a17ae | 288 | static const struct message orf_mode_str[] = {{ORF_MODE_RECEIVE, "Receive"}, |
289 | {ORF_MODE_SEND, "Send"}, | |
290 | {ORF_MODE_BOTH, "Both"}, | |
291 | {0}}; | |
6d58272b | 292 | |
d62a17ae | 293 | static int bgp_capability_orf_entry(struct peer *peer, |
294 | struct capability_header *hdr) | |
718e3744 | 295 | { |
d62a17ae | 296 | struct stream *s = BGP_INPUT(peer); |
297 | struct capability_mp_data mpc; | |
298 | u_char num; | |
299 | iana_afi_t pkt_afi; | |
300 | afi_t afi; | |
301 | safi_t pkt_safi, safi; | |
302 | u_char type; | |
303 | u_char mode; | |
304 | u_int16_t sm_cap = 0; /* capability send-mode receive */ | |
305 | u_int16_t rm_cap = 0; /* capability receive-mode receive */ | |
306 | int i; | |
307 | ||
308 | /* ORF Entry header */ | |
309 | bgp_capability_mp_data(s, &mpc); | |
310 | num = stream_getc(s); | |
311 | pkt_afi = mpc.afi; | |
312 | pkt_safi = mpc.safi; | |
313 | ||
314 | if (bgp_debug_neighbor_events(peer)) | |
315 | zlog_debug("%s ORF Cap entry for afi/safi: %u/%u", peer->host, | |
316 | mpc.afi, mpc.safi); | |
317 | ||
318 | /* Convert AFI, SAFI to internal values, check. */ | |
319 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
320 | zlog_info( | |
321 | "%s Addr-family %d/%d not supported." | |
322 | " Ignoring the ORF capability", | |
323 | peer->host, pkt_afi, pkt_safi); | |
324 | return 0; | |
718e3744 | 325 | } |
d62a17ae | 326 | |
327 | mpc.afi = pkt_afi; | |
328 | mpc.safi = safi; | |
329 | ||
330 | /* validate number field */ | |
331 | if (CAPABILITY_CODE_ORF_LEN + (num * 2) > hdr->length) { | |
332 | zlog_info( | |
333 | "%s ORF Capability entry length error," | |
334 | " Cap length %u, num %u", | |
335 | peer->host, hdr->length, num); | |
336 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
337 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
338 | return -1; | |
718e3744 | 339 | } |
340 | ||
d62a17ae | 341 | for (i = 0; i < num; i++) { |
342 | type = stream_getc(s); | |
343 | mode = stream_getc(s); | |
344 | ||
345 | /* ORF Mode error check */ | |
346 | switch (mode) { | |
347 | case ORF_MODE_BOTH: | |
348 | case ORF_MODE_SEND: | |
349 | case ORF_MODE_RECEIVE: | |
350 | break; | |
351 | default: | |
352 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
353 | type, mode); | |
354 | continue; | |
355 | } | |
356 | /* ORF Type and afi/safi error checks */ | |
357 | /* capcode versus type */ | |
358 | switch (hdr->code) { | |
359 | case CAPABILITY_CODE_ORF: | |
360 | switch (type) { | |
361 | case ORF_TYPE_PREFIX: | |
362 | break; | |
363 | default: | |
364 | bgp_capability_orf_not_support( | |
365 | peer, pkt_afi, pkt_safi, type, mode); | |
366 | continue; | |
367 | } | |
368 | break; | |
369 | case CAPABILITY_CODE_ORF_OLD: | |
370 | switch (type) { | |
371 | case ORF_TYPE_PREFIX_OLD: | |
372 | break; | |
373 | default: | |
374 | bgp_capability_orf_not_support( | |
375 | peer, pkt_afi, pkt_safi, type, mode); | |
376 | continue; | |
377 | } | |
378 | break; | |
379 | default: | |
380 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
381 | type, mode); | |
382 | continue; | |
383 | } | |
384 | ||
385 | /* AFI vs SAFI */ | |
386 | if (!((afi == AFI_IP && safi == SAFI_UNICAST) | |
387 | || (afi == AFI_IP && safi == SAFI_MULTICAST) | |
388 | || (afi == AFI_IP6 && safi == SAFI_UNICAST))) { | |
389 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
390 | type, mode); | |
391 | continue; | |
392 | } | |
393 | ||
394 | if (bgp_debug_neighbor_events(peer)) | |
395 | zlog_debug( | |
396 | "%s OPEN has %s ORF capability" | |
397 | " as %s for afi/safi: %d/%d", | |
398 | peer->host, | |
399 | lookup_msg(orf_type_str, type, NULL), | |
400 | lookup_msg(orf_mode_str, mode, NULL), pkt_afi, | |
401 | pkt_safi); | |
402 | ||
403 | if (hdr->code == CAPABILITY_CODE_ORF) { | |
404 | sm_cap = PEER_CAP_ORF_PREFIX_SM_RCV; | |
405 | rm_cap = PEER_CAP_ORF_PREFIX_RM_RCV; | |
406 | } else if (hdr->code == CAPABILITY_CODE_ORF_OLD) { | |
407 | sm_cap = PEER_CAP_ORF_PREFIX_SM_OLD_RCV; | |
408 | rm_cap = PEER_CAP_ORF_PREFIX_RM_OLD_RCV; | |
409 | } else { | |
410 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
411 | type, mode); | |
412 | continue; | |
413 | } | |
414 | ||
415 | switch (mode) { | |
416 | case ORF_MODE_BOTH: | |
417 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
418 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
419 | break; | |
420 | case ORF_MODE_SEND: | |
421 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
422 | break; | |
423 | case ORF_MODE_RECEIVE: | |
424 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
425 | break; | |
426 | } | |
718e3744 | 427 | } |
d62a17ae | 428 | return 0; |
718e3744 | 429 | } |
430 | ||
d62a17ae | 431 | static int bgp_capability_restart(struct peer *peer, |
432 | struct capability_header *caphdr) | |
6d58272b | 433 | { |
d62a17ae | 434 | struct stream *s = BGP_INPUT(peer); |
435 | u_int16_t restart_flag_time; | |
436 | size_t end = stream_get_getp(s) + caphdr->length; | |
437 | ||
438 | /* Verify length is a multiple of 4 */ | |
439 | if ((caphdr->length - 2) % 4) { | |
440 | zlog_warn( | |
441 | "Restart Cap: Received invalid length %d, non-multiple of 4", | |
442 | caphdr->length); | |
443 | return -1; | |
444 | } | |
445 | ||
446 | SET_FLAG(peer->cap, PEER_CAP_RESTART_RCV); | |
447 | restart_flag_time = stream_getw(s); | |
448 | if (CHECK_FLAG(restart_flag_time, RESTART_R_BIT)) | |
449 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV); | |
450 | ||
451 | UNSET_FLAG(restart_flag_time, 0xF000); | |
452 | peer->v_gr_restart = restart_flag_time; | |
453 | ||
454 | if (bgp_debug_neighbor_events(peer)) { | |
455 | zlog_debug("%s OPEN has Graceful Restart capability", | |
456 | peer->host); | |
457 | zlog_debug("%s Peer has%srestarted. Restart Time : %d", | |
458 | peer->host, | |
459 | CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV) | |
460 | ? " " | |
461 | : " not ", | |
462 | peer->v_gr_restart); | |
463 | } | |
464 | ||
465 | while (stream_get_getp(s) + 4 <= end) { | |
466 | afi_t afi; | |
467 | safi_t safi; | |
468 | iana_afi_t pkt_afi = stream_getw(s); | |
469 | safi_t pkt_safi = stream_getc(s); | |
470 | u_char flag = stream_getc(s); | |
471 | ||
472 | /* Convert AFI, SAFI to internal values, check. */ | |
473 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
474 | if (bgp_debug_neighbor_events(peer)) | |
475 | zlog_debug( | |
476 | "%s Addr-family %d/%d(afi/safi) not supported." | |
477 | " Ignore the Graceful Restart capability for this AFI/SAFI", | |
478 | peer->host, pkt_afi, pkt_safi); | |
479 | } else if (!peer->afc[afi][safi]) { | |
480 | if (bgp_debug_neighbor_events(peer)) | |
481 | zlog_debug( | |
482 | "%s Addr-family %d/%d(afi/safi) not enabled." | |
483 | " Ignore the Graceful Restart capability", | |
484 | peer->host, pkt_afi, pkt_safi); | |
485 | } else { | |
486 | if (bgp_debug_neighbor_events(peer)) | |
487 | zlog_debug( | |
488 | "%s Address family %s is%spreserved", | |
489 | peer->host, afi_safi_print(afi, safi), | |
490 | CHECK_FLAG( | |
491 | peer->af_cap[afi][safi], | |
492 | PEER_CAP_RESTART_AF_PRESERVE_RCV) | |
493 | ? " " | |
494 | : " not "); | |
495 | ||
496 | SET_FLAG(peer->af_cap[afi][safi], | |
497 | PEER_CAP_RESTART_AF_RCV); | |
498 | if (CHECK_FLAG(flag, RESTART_F_BIT)) | |
499 | SET_FLAG(peer->af_cap[afi][safi], | |
500 | PEER_CAP_RESTART_AF_PRESERVE_RCV); | |
501 | } | |
502 | } | |
503 | return 0; | |
6d58272b | 504 | } |
718e3744 | 505 | |
14051b36 | 506 | /* Unlike other capability parsing routines, this one returns 0 on error */ |
d62a17ae | 507 | static as_t bgp_capability_as4(struct peer *peer, struct capability_header *hdr) |
0b2aa3a0 | 508 | { |
d62a17ae | 509 | SET_FLAG(peer->cap, PEER_CAP_AS4_RCV); |
510 | ||
511 | if (hdr->length != CAPABILITY_CODE_AS4_LEN) { | |
512 | zlog_err("%s AS4 capability has incorrect data length %d", | |
513 | peer->host, hdr->length); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | as_t as4 = stream_getl(BGP_INPUT(peer)); | |
518 | ||
519 | if (BGP_DEBUG(as4, AS4)) | |
520 | zlog_debug( | |
521 | "%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u", | |
522 | peer->host, as4); | |
523 | return as4; | |
0b2aa3a0 PJ |
524 | } |
525 | ||
d62a17ae | 526 | static int bgp_capability_addpath(struct peer *peer, |
527 | struct capability_header *hdr) | |
a82478b9 | 528 | { |
d62a17ae | 529 | struct stream *s = BGP_INPUT(peer); |
530 | size_t end = stream_get_getp(s) + hdr->length; | |
531 | ||
532 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_RCV); | |
533 | ||
534 | /* Verify length is a multiple of 4 */ | |
535 | if (hdr->length % 4) { | |
536 | zlog_warn( | |
537 | "Add Path: Received invalid length %d, non-multiple of 4", | |
538 | hdr->length); | |
539 | return -1; | |
540 | } | |
541 | ||
542 | while (stream_get_getp(s) + 4 <= end) { | |
543 | afi_t afi; | |
544 | safi_t safi; | |
545 | iana_afi_t pkt_afi = stream_getw(s); | |
546 | safi_t pkt_safi = stream_getc(s); | |
547 | u_char send_receive = stream_getc(s); | |
548 | ||
549 | if (bgp_debug_neighbor_events(peer)) | |
550 | zlog_debug( | |
551 | "%s OPEN has AddPath CAP for afi/safi: %u/%u%s%s", | |
552 | peer->host, pkt_afi, pkt_safi, | |
553 | (send_receive & BGP_ADDPATH_RX) ? ", receive" | |
554 | : "", | |
555 | (send_receive & BGP_ADDPATH_TX) ? ", transmit" | |
556 | : ""); | |
557 | ||
558 | /* Convert AFI, SAFI to internal values, check. */ | |
559 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
560 | if (bgp_debug_neighbor_events(peer)) | |
561 | zlog_debug( | |
562 | "%s Addr-family %d/%d(afi/safi) not supported." | |
563 | " Ignore the Addpath Attribute for this AFI/SAFI", | |
564 | peer->host, pkt_afi, pkt_safi); | |
565 | continue; | |
566 | } else if (!peer->afc[afi][safi]) { | |
567 | if (bgp_debug_neighbor_events(peer)) | |
568 | zlog_debug( | |
569 | "%s Addr-family %d/%d(afi/safi) not enabled." | |
570 | " Ignore the AddPath capability for this AFI/SAFI", | |
571 | peer->host, pkt_afi, pkt_safi); | |
572 | continue; | |
573 | } | |
574 | ||
575 | if (send_receive & BGP_ADDPATH_RX) | |
576 | SET_FLAG(peer->af_cap[afi][safi], | |
577 | PEER_CAP_ADDPATH_AF_RX_RCV); | |
578 | ||
579 | if (send_receive & BGP_ADDPATH_TX) | |
580 | SET_FLAG(peer->af_cap[afi][safi], | |
581 | PEER_CAP_ADDPATH_AF_TX_RCV); | |
582 | } | |
583 | ||
584 | return 0; | |
a82478b9 DS |
585 | } |
586 | ||
d62a17ae | 587 | static int bgp_capability_enhe(struct peer *peer, struct capability_header *hdr) |
8a92a8a0 | 588 | { |
d62a17ae | 589 | struct stream *s = BGP_INPUT(peer); |
590 | size_t end = stream_get_getp(s) + hdr->length; | |
591 | ||
592 | /* Verify length is a multiple of 4 */ | |
593 | if (hdr->length % 6) { | |
594 | zlog_warn( | |
595 | "Extended NH: Received invalid length %d, non-multiple of 6", | |
596 | hdr->length); | |
597 | return -1; | |
598 | } | |
599 | ||
600 | while (stream_get_getp(s) + 6 <= end) { | |
601 | iana_afi_t pkt_afi = stream_getw(s); | |
602 | afi_t afi; | |
603 | safi_t safi, pkt_safi = stream_getw(s); | |
604 | iana_afi_t pkt_nh_afi = stream_getw(s); | |
605 | afi_t nh_afi; | |
606 | ||
607 | if (bgp_debug_neighbor_events(peer)) | |
608 | zlog_debug( | |
609 | "%s Received with afi/safi/next-hop afi: %u/%u/%u", | |
610 | peer->host, pkt_afi, pkt_safi, pkt_nh_afi); | |
611 | ||
612 | /* Convert AFI, SAFI to internal values, check. */ | |
613 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
614 | if (bgp_debug_neighbor_events(peer)) | |
615 | zlog_debug( | |
616 | "%s Addr-family %d/%d(afi/safi) not supported." | |
617 | " Ignore the ENHE Attribute for this AFI/SAFI", | |
618 | peer->host, pkt_afi, pkt_safi); | |
619 | continue; | |
620 | } | |
621 | ||
622 | /* RFC 5549 specifies use of this capability only for IPv4 AFI, | |
623 | * with | |
624 | * the Nexthop AFI being IPv6. A future spec may introduce other | |
625 | * possibilities, so we ignore other values with a log. Also, | |
626 | * only | |
627 | * SAFI_UNICAST and SAFI_LABELED_UNICAST are currently supported | |
628 | * (and expected). | |
629 | */ | |
630 | nh_afi = afi_iana2int(pkt_nh_afi); | |
631 | ||
632 | if (afi != AFI_IP || nh_afi != AFI_IP6 | |
633 | || !(safi == SAFI_UNICAST | |
634 | || safi == SAFI_LABELED_UNICAST)) { | |
635 | zlog_warn( | |
636 | "%s Unexpected afi/safi/next-hop afi: %u/%u/%u " | |
637 | "in Extended Next-hop capability, ignoring", | |
638 | peer->host, pkt_afi, pkt_safi, pkt_nh_afi); | |
639 | continue; | |
640 | } | |
641 | ||
642 | SET_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV); | |
643 | ||
644 | if (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_ADV)) | |
645 | SET_FLAG(peer->af_cap[afi][safi], | |
646 | PEER_CAP_ENHE_AF_NEGO); | |
647 | } | |
648 | ||
649 | SET_FLAG(peer->cap, PEER_CAP_ENHE_RCV); | |
650 | ||
651 | return 0; | |
8a92a8a0 DS |
652 | } |
653 | ||
d62a17ae | 654 | static int bgp_capability_hostname(struct peer *peer, |
655 | struct capability_header *hdr) | |
04b6bdc0 | 656 | { |
d62a17ae | 657 | struct stream *s = BGP_INPUT(peer); |
658 | char str[BGP_MAX_HOSTNAME + 1]; | |
659 | size_t end = stream_get_getp(s) + hdr->length; | |
660 | u_char len; | |
661 | ||
662 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_RCV); | |
663 | ||
664 | len = stream_getc(s); | |
665 | if (stream_get_getp(s) + len > end) { | |
666 | zlog_warn( | |
667 | "%s: Received malformed hostname capability from peer %s", | |
668 | __FUNCTION__, peer->host); | |
669 | return -1; | |
670 | } | |
671 | ||
672 | if (len > BGP_MAX_HOSTNAME) { | |
673 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
674 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
675 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
676 | } else if (len) | |
677 | stream_get(str, s, len); | |
678 | ||
679 | if (len) { | |
680 | str[len] = '\0'; | |
681 | ||
682 | if (peer->hostname != NULL) { | |
683 | XFREE(MTYPE_BGP_PEER_HOST, peer->hostname); | |
684 | peer->hostname = NULL; | |
685 | } | |
686 | ||
687 | if (peer->domainname != NULL) { | |
688 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); | |
689 | peer->domainname = NULL; | |
690 | } | |
691 | ||
692 | peer->hostname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); | |
693 | } | |
694 | ||
695 | if (stream_get_getp(s) + 1 > end) { | |
696 | zlog_warn( | |
697 | "%s: Received invalid domain name len (hostname capability) from peer %s", | |
698 | __FUNCTION__, peer->host); | |
699 | return -1; | |
700 | } | |
701 | ||
702 | len = stream_getc(s); | |
703 | if (stream_get_getp(s) + len > end) { | |
704 | zlog_warn( | |
705 | "%s: Received runt domain name (hostname capability) from peer %s", | |
706 | __FUNCTION__, peer->host); | |
707 | return -1; | |
708 | } | |
709 | ||
710 | if (len > BGP_MAX_HOSTNAME) { | |
711 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
712 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
713 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
714 | } else if (len) | |
715 | stream_get(str, s, len); | |
716 | ||
717 | if (len) { | |
718 | str[len] = '\0'; | |
719 | peer->domainname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); | |
720 | } | |
721 | ||
722 | if (bgp_debug_neighbor_events(peer)) { | |
723 | zlog_debug("%s received hostname %s, domainname %s", peer->host, | |
724 | peer->hostname, peer->domainname); | |
725 | } | |
726 | ||
727 | return 0; | |
04b6bdc0 DW |
728 | } |
729 | ||
d62a17ae | 730 | static const struct message capcode_str[] = { |
731 | {CAPABILITY_CODE_MP, "MultiProtocol Extensions"}, | |
732 | {CAPABILITY_CODE_REFRESH, "Route Refresh"}, | |
733 | {CAPABILITY_CODE_ORF, "Cooperative Route Filtering"}, | |
734 | {CAPABILITY_CODE_RESTART, "Graceful Restart"}, | |
735 | {CAPABILITY_CODE_AS4, "4-octet AS number"}, | |
736 | {CAPABILITY_CODE_ADDPATH, "AddPath"}, | |
737 | {CAPABILITY_CODE_DYNAMIC, "Dynamic"}, | |
738 | {CAPABILITY_CODE_ENHE, "Extended Next Hop Encoding"}, | |
739 | {CAPABILITY_CODE_DYNAMIC_OLD, "Dynamic (Old)"}, | |
740 | {CAPABILITY_CODE_REFRESH_OLD, "Route Refresh (Old)"}, | |
741 | {CAPABILITY_CODE_ORF_OLD, "ORF (Old)"}, | |
742 | {CAPABILITY_CODE_FQDN, "FQDN"}, | |
743 | {0}}; | |
6d58272b PJ |
744 | |
745 | /* Minimum sizes for length field of each cap (so not inc. the header) */ | |
d62a17ae | 746 | static const size_t cap_minsizes[] = { |
9d303b37 DL |
747 | [CAPABILITY_CODE_MP] = CAPABILITY_CODE_MP_LEN, |
748 | [CAPABILITY_CODE_REFRESH] = CAPABILITY_CODE_REFRESH_LEN, | |
749 | [CAPABILITY_CODE_ORF] = CAPABILITY_CODE_ORF_LEN, | |
750 | [CAPABILITY_CODE_RESTART] = CAPABILITY_CODE_RESTART_LEN, | |
751 | [CAPABILITY_CODE_AS4] = CAPABILITY_CODE_AS4_LEN, | |
752 | [CAPABILITY_CODE_ADDPATH] = CAPABILITY_CODE_ADDPATH_LEN, | |
753 | [CAPABILITY_CODE_DYNAMIC] = CAPABILITY_CODE_DYNAMIC_LEN, | |
754 | [CAPABILITY_CODE_DYNAMIC_OLD] = CAPABILITY_CODE_DYNAMIC_LEN, | |
755 | [CAPABILITY_CODE_ENHE] = CAPABILITY_CODE_ENHE_LEN, | |
756 | [CAPABILITY_CODE_REFRESH_OLD] = CAPABILITY_CODE_REFRESH_LEN, | |
757 | [CAPABILITY_CODE_ORF_OLD] = CAPABILITY_CODE_ORF_LEN, | |
758 | [CAPABILITY_CODE_FQDN] = CAPABILITY_CODE_MIN_FQDN_LEN, | |
6d58272b PJ |
759 | }; |
760 | ||
695ef95f PJ |
761 | /* value the capability must be a multiple of. |
762 | * 0-data capabilities won't be checked against this. | |
763 | * Other capabilities whose data doesn't fall on convenient boundaries for this | |
764 | * table should be set to 1. | |
765 | */ | |
d62a17ae | 766 | static const size_t cap_modsizes[] = { |
9d303b37 DL |
767 | [CAPABILITY_CODE_MP] = 4, |
768 | [CAPABILITY_CODE_REFRESH] = 1, | |
769 | [CAPABILITY_CODE_ORF] = 1, | |
770 | [CAPABILITY_CODE_RESTART] = 1, | |
771 | [CAPABILITY_CODE_AS4] = 4, | |
772 | [CAPABILITY_CODE_ADDPATH] = 4, | |
773 | [CAPABILITY_CODE_DYNAMIC] = 1, | |
774 | [CAPABILITY_CODE_DYNAMIC_OLD] = 1, | |
775 | [CAPABILITY_CODE_ENHE] = 6, | |
776 | [CAPABILITY_CODE_REFRESH_OLD] = 1, | |
777 | [CAPABILITY_CODE_ORF_OLD] = 1, | |
778 | [CAPABILITY_CODE_FQDN] = 1, | |
695ef95f PJ |
779 | }; |
780 | ||
3b381c32 AS |
781 | /** |
782 | * Parse given capability. | |
6d58272b | 783 | * XXX: This is reading into a stream, but not using stream API |
3b381c32 AS |
784 | * |
785 | * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol | |
786 | * capabilities were encountered. | |
6d58272b | 787 | */ |
d62a17ae | 788 | static int bgp_capability_parse(struct peer *peer, size_t length, |
789 | int *mp_capability, u_char **error) | |
6d58272b | 790 | { |
d62a17ae | 791 | int ret; |
792 | struct stream *s = BGP_INPUT(peer); | |
793 | size_t end = stream_get_getp(s) + length; | |
794 | ||
795 | assert(STREAM_READABLE(s) >= length); | |
796 | ||
797 | while (stream_get_getp(s) < end) { | |
798 | size_t start; | |
799 | u_char *sp = stream_pnt(s); | |
800 | struct capability_header caphdr; | |
801 | ||
802 | ret = 0; | |
803 | /* We need at least capability code and capability length. */ | |
804 | if (stream_get_getp(s) + 2 > end) { | |
805 | zlog_info("%s Capability length error (< header)", | |
806 | peer->host); | |
807 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
808 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
809 | return -1; | |
810 | } | |
811 | ||
812 | caphdr.code = stream_getc(s); | |
813 | caphdr.length = stream_getc(s); | |
814 | start = stream_get_getp(s); | |
815 | ||
816 | /* Capability length check sanity check. */ | |
817 | if (start + caphdr.length > end) { | |
818 | zlog_info("%s Capability length error (< length)", | |
819 | peer->host); | |
820 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
821 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
822 | return -1; | |
823 | } | |
824 | ||
825 | if (bgp_debug_neighbor_events(peer)) | |
826 | zlog_debug("%s OPEN has %s capability (%u), length %u", | |
827 | peer->host, | |
828 | lookup_msg(capcode_str, caphdr.code, NULL), | |
829 | caphdr.code, caphdr.length); | |
830 | ||
831 | /* Length sanity check, type-specific, for known capabilities */ | |
832 | switch (caphdr.code) { | |
833 | case CAPABILITY_CODE_MP: | |
834 | case CAPABILITY_CODE_REFRESH: | |
835 | case CAPABILITY_CODE_REFRESH_OLD: | |
836 | case CAPABILITY_CODE_ORF: | |
837 | case CAPABILITY_CODE_ORF_OLD: | |
838 | case CAPABILITY_CODE_RESTART: | |
839 | case CAPABILITY_CODE_AS4: | |
840 | case CAPABILITY_CODE_ADDPATH: | |
841 | case CAPABILITY_CODE_DYNAMIC: | |
842 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
843 | case CAPABILITY_CODE_ENHE: | |
844 | case CAPABILITY_CODE_FQDN: | |
845 | /* Check length. */ | |
846 | if (caphdr.length < cap_minsizes[caphdr.code]) { | |
847 | zlog_info( | |
848 | "%s %s Capability length error: got %u," | |
849 | " expected at least %u", | |
850 | peer->host, | |
851 | lookup_msg(capcode_str, caphdr.code, | |
852 | NULL), | |
853 | caphdr.length, | |
854 | (unsigned)cap_minsizes[caphdr.code]); | |
855 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
856 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
857 | return -1; | |
858 | } | |
859 | if (caphdr.length | |
860 | && caphdr.length % cap_modsizes[caphdr.code] != 0) { | |
861 | zlog_info( | |
862 | "%s %s Capability length error: got %u," | |
863 | " expected a multiple of %u", | |
864 | peer->host, | |
865 | lookup_msg(capcode_str, caphdr.code, | |
866 | NULL), | |
867 | caphdr.length, | |
868 | (unsigned)cap_modsizes[caphdr.code]); | |
869 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
870 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
871 | return -1; | |
872 | } | |
873 | /* we deliberately ignore unknown codes, see below */ | |
874 | default: | |
875 | break; | |
876 | } | |
877 | ||
878 | switch (caphdr.code) { | |
879 | case CAPABILITY_CODE_MP: { | |
880 | *mp_capability = 1; | |
881 | ||
882 | /* Ignore capability when override-capability is set. */ | |
883 | if (!CHECK_FLAG(peer->flags, | |
884 | PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
885 | /* Set negotiated value. */ | |
886 | ret = bgp_capability_mp(peer, &caphdr); | |
887 | ||
888 | /* Unsupported Capability. */ | |
889 | if (ret < 0) { | |
890 | /* Store return data. */ | |
891 | memcpy(*error, sp, caphdr.length + 2); | |
892 | *error += caphdr.length + 2; | |
893 | } | |
894 | ret = 0; /* Don't return error for this */ | |
895 | } | |
896 | } break; | |
897 | case CAPABILITY_CODE_REFRESH: | |
898 | case CAPABILITY_CODE_REFRESH_OLD: { | |
899 | /* BGP refresh capability */ | |
900 | if (caphdr.code == CAPABILITY_CODE_REFRESH_OLD) | |
901 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV); | |
902 | else | |
903 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV); | |
904 | } break; | |
905 | case CAPABILITY_CODE_ORF: | |
906 | case CAPABILITY_CODE_ORF_OLD: | |
907 | ret = bgp_capability_orf_entry(peer, &caphdr); | |
908 | break; | |
909 | case CAPABILITY_CODE_RESTART: | |
910 | ret = bgp_capability_restart(peer, &caphdr); | |
911 | break; | |
912 | case CAPABILITY_CODE_DYNAMIC: | |
913 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
914 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV); | |
915 | break; | |
916 | case CAPABILITY_CODE_AS4: | |
917 | /* Already handled as a special-case parsing of the | |
918 | * capabilities | |
919 | * at the beginning of OPEN processing. So we care not a | |
920 | * jot | |
921 | * for the value really, only error case. | |
922 | */ | |
923 | if (!bgp_capability_as4(peer, &caphdr)) | |
924 | ret = -1; | |
925 | break; | |
926 | case CAPABILITY_CODE_ADDPATH: | |
927 | ret = bgp_capability_addpath(peer, &caphdr); | |
928 | break; | |
929 | case CAPABILITY_CODE_ENHE: | |
930 | ret = bgp_capability_enhe(peer, &caphdr); | |
931 | break; | |
932 | case CAPABILITY_CODE_FQDN: | |
933 | ret = bgp_capability_hostname(peer, &caphdr); | |
934 | break; | |
935 | default: | |
936 | if (caphdr.code > 128) { | |
937 | /* We don't send Notification for unknown vendor | |
938 | specific | |
939 | capabilities. It seems reasonable for now... | |
940 | */ | |
941 | zlog_warn("%s Vendor specific capability %d", | |
942 | peer->host, caphdr.code); | |
943 | } else { | |
944 | zlog_warn( | |
945 | "%s unrecognized capability code: %d - ignored", | |
946 | peer->host, caphdr.code); | |
947 | memcpy(*error, sp, caphdr.length + 2); | |
948 | *error += caphdr.length + 2; | |
949 | } | |
950 | } | |
951 | ||
952 | if (ret < 0) { | |
953 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
954 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
955 | return -1; | |
956 | } | |
957 | if (stream_get_getp(s) != (start + caphdr.length)) { | |
958 | if (stream_get_getp(s) > (start + caphdr.length)) | |
959 | zlog_warn( | |
960 | "%s Cap-parser for %s read past cap-length, %u!", | |
961 | peer->host, | |
962 | lookup_msg(capcode_str, caphdr.code, | |
963 | NULL), | |
964 | caphdr.length); | |
965 | stream_set_getp(s, start + caphdr.length); | |
966 | } | |
718e3744 | 967 | } |
d62a17ae | 968 | return 0; |
718e3744 | 969 | } |
970 | ||
d62a17ae | 971 | static int bgp_auth_parse(struct peer *peer, size_t length) |
718e3744 | 972 | { |
d62a17ae | 973 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, |
974 | BGP_NOTIFY_OPEN_AUTH_FAILURE); | |
975 | return -1; | |
718e3744 | 976 | } |
977 | ||
d62a17ae | 978 | static int strict_capability_same(struct peer *peer) |
718e3744 | 979 | { |
d62a17ae | 980 | int i, j; |
718e3744 | 981 | |
d62a17ae | 982 | for (i = AFI_IP; i < AFI_MAX; i++) |
983 | for (j = SAFI_UNICAST; j < SAFI_MAX; j++) | |
984 | if (peer->afc[i][j] != peer->afc_nego[i][j]) | |
985 | return 0; | |
986 | return 1; | |
718e3744 | 987 | } |
988 | ||
0b2aa3a0 PJ |
989 | /* peek into option, stores ASN to *as4 if the AS4 capability was found. |
990 | * Returns 0 if no as4 found, as4cap value otherwise. | |
991 | */ | |
d62a17ae | 992 | as_t peek_for_as4_capability(struct peer *peer, u_char length) |
0b2aa3a0 | 993 | { |
d62a17ae | 994 | struct stream *s = BGP_INPUT(peer); |
995 | size_t orig_getp = stream_get_getp(s); | |
996 | size_t end = orig_getp + length; | |
997 | as_t as4 = 0; | |
998 | ||
999 | if (BGP_DEBUG(as4, AS4)) | |
1000 | zlog_info( | |
1001 | "%s [AS4] rcv OPEN w/ OPTION parameter len: %u," | |
1002 | " peeking for as4", | |
1003 | peer->host, length); | |
1004 | /* the error cases we DONT handle, we ONLY try to read as4 out of | |
1005 | * correctly formatted options. | |
1006 | */ | |
1007 | while (stream_get_getp(s) < end) { | |
1008 | u_char opt_type; | |
1009 | u_char opt_length; | |
1010 | ||
1011 | /* Check the length. */ | |
1012 | if (stream_get_getp(s) + 2 > end) | |
1013 | goto end; | |
1014 | ||
1015 | /* Fetch option type and length. */ | |
1016 | opt_type = stream_getc(s); | |
1017 | opt_length = stream_getc(s); | |
1018 | ||
1019 | /* Option length check. */ | |
1020 | if (stream_get_getp(s) + opt_length > end) | |
1021 | goto end; | |
1022 | ||
1023 | if (opt_type == BGP_OPEN_OPT_CAP) { | |
1024 | unsigned long capd_start = stream_get_getp(s); | |
1025 | unsigned long capd_end = capd_start + opt_length; | |
1026 | ||
1027 | assert(capd_end <= end); | |
1028 | ||
1029 | while (stream_get_getp(s) < capd_end) { | |
1030 | struct capability_header hdr; | |
1031 | ||
1032 | if (stream_get_getp(s) + 2 > capd_end) | |
1033 | goto end; | |
1034 | ||
1035 | hdr.code = stream_getc(s); | |
1036 | hdr.length = stream_getc(s); | |
1037 | ||
1038 | if ((stream_get_getp(s) + hdr.length) | |
1039 | > capd_end) | |
1040 | goto end; | |
1041 | ||
1042 | if (hdr.code == CAPABILITY_CODE_AS4) { | |
1043 | if (BGP_DEBUG(as4, AS4)) | |
1044 | zlog_info( | |
1045 | "[AS4] found AS4 capability, about to parse"); | |
1046 | as4 = bgp_capability_as4(peer, &hdr); | |
1047 | ||
1048 | goto end; | |
1049 | } | |
1050 | stream_forward_getp(s, hdr.length); | |
1051 | } | |
1052 | } | |
0b2aa3a0 | 1053 | } |
0b2aa3a0 PJ |
1054 | |
1055 | end: | |
d62a17ae | 1056 | stream_set_getp(s, orig_getp); |
1057 | return as4; | |
0b2aa3a0 PJ |
1058 | } |
1059 | ||
3b381c32 AS |
1060 | /** |
1061 | * Parse open option. | |
1062 | * | |
1063 | * @param[out] mp_capability @see bgp_capability_parse() for semantics. | |
1064 | */ | |
d62a17ae | 1065 | int bgp_open_option_parse(struct peer *peer, u_char length, int *mp_capability) |
718e3744 | 1066 | { |
d62a17ae | 1067 | int ret = 0; |
1068 | u_char *error; | |
1069 | u_char error_data[BGP_MAX_PACKET_SIZE]; | |
1070 | struct stream *s = BGP_INPUT(peer); | |
1071 | size_t end = stream_get_getp(s) + length; | |
1072 | ||
1073 | error = error_data; | |
1074 | ||
1075 | if (bgp_debug_neighbor_events(peer)) | |
1076 | zlog_debug("%s rcv OPEN w/ OPTION parameter len: %u", | |
1077 | peer->host, length); | |
1078 | ||
1079 | while (stream_get_getp(s) < end) { | |
1080 | u_char opt_type; | |
1081 | u_char opt_length; | |
1082 | ||
1083 | /* Must have at least an OPEN option header */ | |
1084 | if (STREAM_READABLE(s) < 2) { | |
1085 | zlog_info("%s Option length error", peer->host); | |
1086 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1087 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1088 | return -1; | |
1089 | } | |
1090 | ||
1091 | /* Fetch option type and length. */ | |
1092 | opt_type = stream_getc(s); | |
1093 | opt_length = stream_getc(s); | |
1094 | ||
1095 | /* Option length check. */ | |
1096 | if (STREAM_READABLE(s) < opt_length) { | |
1097 | zlog_info("%s Option length error", peer->host); | |
1098 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1099 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1100 | return -1; | |
1101 | } | |
1102 | ||
1103 | if (bgp_debug_neighbor_events(peer)) | |
1104 | zlog_debug( | |
1105 | "%s rcvd OPEN w/ optional parameter type %u (%s) len %u", | |
1106 | peer->host, opt_type, | |
1107 | opt_type == BGP_OPEN_OPT_AUTH | |
1108 | ? "Authentication" | |
1109 | : opt_type == BGP_OPEN_OPT_CAP | |
1110 | ? "Capability" | |
1111 | : "Unknown", | |
1112 | opt_length); | |
1113 | ||
1114 | switch (opt_type) { | |
1115 | case BGP_OPEN_OPT_AUTH: | |
1116 | ret = bgp_auth_parse(peer, opt_length); | |
1117 | break; | |
1118 | case BGP_OPEN_OPT_CAP: | |
1119 | ret = bgp_capability_parse(peer, opt_length, | |
1120 | mp_capability, &error); | |
1121 | break; | |
1122 | default: | |
1123 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1124 | BGP_NOTIFY_OPEN_UNSUP_PARAM); | |
1125 | ret = -1; | |
1126 | break; | |
1127 | } | |
1128 | ||
1129 | /* Parse error. To accumulate all unsupported capability codes, | |
1130 | bgp_capability_parse does not return -1 when encounter | |
1131 | unsupported capability code. To detect that, please check | |
1132 | error and erro_data pointer, like below. */ | |
1133 | if (ret < 0) | |
1134 | return -1; | |
718e3744 | 1135 | } |
1136 | ||
d62a17ae | 1137 | /* All OPEN option is parsed. Check capability when strict compare |
1138 | flag is enabled.*/ | |
1139 | if (CHECK_FLAG(peer->flags, PEER_FLAG_STRICT_CAP_MATCH)) { | |
1140 | /* If Unsupported Capability exists. */ | |
1141 | if (error != error_data) { | |
1142 | bgp_notify_send_with_data(peer, BGP_NOTIFY_OPEN_ERR, | |
1143 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1144 | error_data, | |
1145 | error - error_data); | |
1146 | return -1; | |
1147 | } | |
1148 | ||
1149 | /* Check local capability does not negotiated with remote | |
1150 | peer. */ | |
1151 | if (!strict_capability_same(peer)) { | |
1152 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1153 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1154 | return -1; | |
1155 | } | |
718e3744 | 1156 | } |
1157 | ||
d62a17ae | 1158 | /* Check there are no common AFI/SAFIs and send Unsupported Capability |
1159 | error. */ | |
1160 | if (*mp_capability | |
1161 | && !CHECK_FLAG(peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
1162 | if (!peer->afc_nego[AFI_IP][SAFI_UNICAST] | |
1163 | && !peer->afc_nego[AFI_IP][SAFI_MULTICAST] | |
1164 | && !peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST] | |
1165 | && !peer->afc_nego[AFI_IP][SAFI_MPLS_VPN] | |
1166 | && !peer->afc_nego[AFI_IP][SAFI_ENCAP] | |
1167 | && !peer->afc_nego[AFI_IP6][SAFI_UNICAST] | |
1168 | && !peer->afc_nego[AFI_IP6][SAFI_MULTICAST] | |
1169 | && !peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST] | |
1170 | && !peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN] | |
1171 | && !peer->afc_nego[AFI_IP6][SAFI_ENCAP] | |
1172 | && !peer->afc_nego[AFI_L2VPN][SAFI_EVPN]) { | |
1173 | zlog_err( | |
1174 | "%s [Error] Configured AFI/SAFIs do not " | |
1175 | "overlap with received MP capabilities", | |
1176 | peer->host); | |
1177 | ||
1178 | if (error != error_data) | |
1179 | bgp_notify_send_with_data( | |
1180 | peer, BGP_NOTIFY_OPEN_ERR, | |
1181 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, error_data, | |
1182 | error - error_data); | |
1183 | else | |
1184 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1185 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1186 | return -1; | |
1187 | } | |
718e3744 | 1188 | } |
d62a17ae | 1189 | return 0; |
718e3744 | 1190 | } |
1191 | ||
d62a17ae | 1192 | static void bgp_open_capability_orf(struct stream *s, struct peer *peer, |
1193 | afi_t afi, safi_t safi, u_char code) | |
718e3744 | 1194 | { |
d62a17ae | 1195 | u_char cap_len; |
1196 | u_char orf_len; | |
1197 | unsigned long capp; | |
1198 | unsigned long orfp; | |
1199 | unsigned long numberp; | |
1200 | int number_of_orfs = 0; | |
1201 | iana_afi_t pkt_afi; | |
1202 | safi_t pkt_safi; | |
1203 | ||
1204 | /* Convert AFI, SAFI to values for packet. */ | |
1205 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, &pkt_safi); | |
1206 | ||
1207 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1208 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1209 | stream_putc(s, 0); /* Capability Length */ | |
1210 | stream_putc(s, code); /* Capability Code */ | |
1211 | orfp = stream_get_endp(s); /* Set ORF Len Pointer */ | |
1212 | stream_putc(s, 0); /* ORF Length */ | |
1213 | stream_putw(s, pkt_afi); | |
1214 | stream_putc(s, 0); | |
1215 | stream_putc(s, pkt_safi); | |
1216 | numberp = stream_get_endp(s); /* Set Number Pointer */ | |
1217 | stream_putc(s, 0); /* Number of ORFs */ | |
1218 | ||
1219 | /* Address Prefix ORF */ | |
1220 | if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1221 | || CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) { | |
1222 | stream_putc(s, (code == CAPABILITY_CODE_ORF | |
1223 | ? ORF_TYPE_PREFIX | |
1224 | : ORF_TYPE_PREFIX_OLD)); | |
1225 | ||
1226 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1227 | PEER_FLAG_ORF_PREFIX_SM) | |
1228 | && CHECK_FLAG(peer->af_flags[afi][safi], | |
1229 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1230 | SET_FLAG(peer->af_cap[afi][safi], | |
1231 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1232 | SET_FLAG(peer->af_cap[afi][safi], | |
1233 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1234 | stream_putc(s, ORF_MODE_BOTH); | |
1235 | } else if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1236 | PEER_FLAG_ORF_PREFIX_SM)) { | |
1237 | SET_FLAG(peer->af_cap[afi][safi], | |
1238 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1239 | stream_putc(s, ORF_MODE_SEND); | |
1240 | } else { | |
1241 | SET_FLAG(peer->af_cap[afi][safi], | |
1242 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1243 | stream_putc(s, ORF_MODE_RECEIVE); | |
1244 | } | |
1245 | number_of_orfs++; | |
718e3744 | 1246 | } |
718e3744 | 1247 | |
d62a17ae | 1248 | /* Total Number of ORFs. */ |
1249 | stream_putc_at(s, numberp, number_of_orfs); | |
718e3744 | 1250 | |
d62a17ae | 1251 | /* Total ORF Len. */ |
1252 | orf_len = stream_get_endp(s) - orfp - 1; | |
1253 | stream_putc_at(s, orfp, orf_len); | |
718e3744 | 1254 | |
d62a17ae | 1255 | /* Total Capability Len. */ |
1256 | cap_len = stream_get_endp(s) - capp - 1; | |
1257 | stream_putc_at(s, capp, cap_len); | |
718e3744 | 1258 | } |
1259 | ||
1260 | /* Fill in capability open option to the packet. */ | |
d62a17ae | 1261 | void bgp_open_capability(struct stream *s, struct peer *peer) |
718e3744 | 1262 | { |
d62a17ae | 1263 | u_char len; |
1264 | unsigned long cp, capp, rcapp; | |
1265 | iana_afi_t pkt_afi; | |
1266 | afi_t afi; | |
1267 | safi_t safi, pkt_safi; | |
1268 | as_t local_as; | |
1269 | u_int32_t restart_time; | |
1270 | u_char afi_safi_count = 0; | |
1271 | struct utsname names; | |
1272 | int adv_addpath_tx = 0; | |
1273 | ||
1274 | /* Remember current pointer for Opt Parm Len. */ | |
1275 | cp = stream_get_endp(s); | |
1276 | ||
1277 | /* Opt Parm Len. */ | |
1278 | stream_putc(s, 0); | |
1279 | ||
1280 | /* Do not send capability. */ | |
1281 | if (!CHECK_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN) | |
1282 | || CHECK_FLAG(peer->flags, PEER_FLAG_DONT_CAPABILITY)) | |
1283 | return; | |
1284 | ||
1285 | /* MP capability for configured AFI, SAFI */ | |
1286 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1287 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) { | |
1288 | if (peer->afc[afi][safi]) { | |
1289 | /* Convert AFI, SAFI to values for packet. */ | |
1290 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1291 | &pkt_safi); | |
1292 | ||
1293 | peer->afc_adv[afi][safi] = 1; | |
1294 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1295 | stream_putc(s, CAPABILITY_CODE_MP_LEN + 2); | |
1296 | stream_putc(s, CAPABILITY_CODE_MP); | |
1297 | stream_putc(s, CAPABILITY_CODE_MP_LEN); | |
1298 | stream_putw(s, pkt_afi); | |
1299 | stream_putc(s, 0); | |
1300 | stream_putc(s, pkt_safi); | |
1301 | ||
1302 | /* Extended nexthop capability - currently | |
1303 | * supporting RFC-5549 for | |
1304 | * Link-Local peering only | |
1305 | */ | |
1306 | if (CHECK_FLAG(peer->flags, | |
1307 | PEER_FLAG_CAPABILITY_ENHE) | |
1308 | && peer->su.sa.sa_family == AF_INET6 | |
1309 | && IN6_IS_ADDR_LINKLOCAL( | |
1310 | &peer->su.sin6.sin6_addr) | |
1311 | && afi == AFI_IP | |
1312 | && (safi == SAFI_UNICAST | |
1313 | || safi == SAFI_LABELED_UNICAST)) { | |
1314 | /* RFC 5549 Extended Next Hop Encoding | |
1315 | */ | |
1316 | SET_FLAG(peer->cap, PEER_CAP_ENHE_ADV); | |
1317 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
9d303b37 DL |
1318 | stream_putc(s, |
1319 | CAPABILITY_CODE_ENHE_LEN | |
1320 | + 2); | |
d62a17ae | 1321 | stream_putc(s, CAPABILITY_CODE_ENHE); |
1322 | stream_putc(s, | |
1323 | CAPABILITY_CODE_ENHE_LEN); | |
1324 | ||
1325 | SET_FLAG(peer->af_cap[AFI_IP][safi], | |
1326 | PEER_CAP_ENHE_AF_ADV); | |
1327 | stream_putw(s, pkt_afi); | |
1328 | stream_putw(s, pkt_safi); | |
1329 | stream_putw(s, afi_int2iana(AFI_IP6)); | |
1330 | ||
1331 | if (CHECK_FLAG(peer->af_cap[afi][safi], | |
1332 | PEER_CAP_ENHE_AF_RCV)) | |
1333 | SET_FLAG( | |
1334 | peer->af_cap[afi][safi], | |
1335 | PEER_CAP_ENHE_AF_NEGO); | |
1336 | } | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | /* Route refresh. */ | |
1341 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_ADV); | |
1342 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1343 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1344 | stream_putc(s, CAPABILITY_CODE_REFRESH_OLD); | |
1345 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1346 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1347 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1348 | stream_putc(s, CAPABILITY_CODE_REFRESH); | |
1349 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1350 | ||
1351 | /* AS4 */ | |
1352 | SET_FLAG(peer->cap, PEER_CAP_AS4_ADV); | |
1353 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1354 | stream_putc(s, CAPABILITY_CODE_AS4_LEN + 2); | |
1355 | stream_putc(s, CAPABILITY_CODE_AS4); | |
1356 | stream_putc(s, CAPABILITY_CODE_AS4_LEN); | |
1357 | if (peer->change_local_as) | |
1358 | local_as = peer->change_local_as; | |
1359 | else | |
1360 | local_as = peer->local_as; | |
1361 | stream_putl(s, local_as); | |
1362 | ||
1363 | /* AddPath */ | |
1364 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1365 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
1366 | if (peer->afc[afi][safi]) { | |
1367 | afi_safi_count++; | |
1368 | ||
1369 | /* Only advertise addpath TX if a feature that | |
1370 | * will use it is | |
1371 | * configured */ | |
1372 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1373 | PEER_FLAG_ADDPATH_TX_ALL_PATHS) | |
1374 | || CHECK_FLAG( | |
1375 | peer->af_flags[afi][safi], | |
1376 | PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) | |
1377 | adv_addpath_tx = 1; | |
1378 | } | |
1379 | ||
1380 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_ADV); | |
1381 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1382 | stream_putc(s, (CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count) + 2); | |
1383 | stream_putc(s, CAPABILITY_CODE_ADDPATH); | |
1384 | stream_putc(s, CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count); | |
1385 | ||
1386 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1387 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
1388 | if (peer->afc[afi][safi]) { | |
1389 | /* Convert AFI, SAFI to values for packet. */ | |
1390 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1391 | &pkt_safi); | |
1392 | ||
1393 | stream_putw(s, pkt_afi); | |
1394 | stream_putc(s, pkt_safi); | |
1395 | ||
1396 | if (adv_addpath_tx) { | |
1397 | stream_putc(s, | |
1398 | BGP_ADDPATH_RX | |
1399 | | BGP_ADDPATH_TX); | |
1400 | SET_FLAG(peer->af_cap[afi][safi], | |
1401 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1402 | SET_FLAG(peer->af_cap[afi][safi], | |
1403 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
1404 | } else { | |
1405 | stream_putc(s, BGP_ADDPATH_RX); | |
1406 | SET_FLAG(peer->af_cap[afi][safi], | |
1407 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1408 | UNSET_FLAG(peer->af_cap[afi][safi], | |
1409 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | /* ORF capability. */ | |
1414 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1415 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
1416 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1417 | PEER_FLAG_ORF_PREFIX_SM) | |
1418 | || CHECK_FLAG(peer->af_flags[afi][safi], | |
1419 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1420 | bgp_open_capability_orf( | |
1421 | s, peer, afi, safi, | |
1422 | CAPABILITY_CODE_ORF_OLD); | |
1423 | bgp_open_capability_orf(s, peer, afi, safi, | |
1424 | CAPABILITY_CODE_ORF); | |
1425 | } | |
1426 | ||
1427 | /* Dynamic capability. */ | |
1428 | if (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY)) { | |
1429 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_ADV); | |
1430 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1431 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1432 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_OLD); | |
1433 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1434 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1435 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1436 | stream_putc(s, CAPABILITY_CODE_DYNAMIC); | |
1437 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
718e3744 | 1438 | } |
1439 | ||
d62a17ae | 1440 | /* Hostname capability */ |
1441 | uname(&names); | |
1442 | if (names.nodename[0] != '\0') { | |
1443 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_ADV); | |
1444 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1445 | rcapp = stream_get_endp(s); /* Ptr to length placeholder */ | |
1446 | stream_putc(s, 0); /* dummy len for now */ | |
1447 | stream_putc(s, CAPABILITY_CODE_FQDN); | |
1448 | capp = stream_get_endp(s); | |
1449 | stream_putc(s, 0); /* dummy len for now */ | |
1450 | len = strlen(names.nodename); | |
1451 | if (len > BGP_MAX_HOSTNAME) | |
1452 | len = BGP_MAX_HOSTNAME; | |
1453 | ||
1454 | stream_putc(s, len); | |
1455 | stream_put(s, names.nodename, len); | |
60060acc | 1456 | #ifdef HAVE_STRUCT_UTSNAME_DOMAINNAME |
d62a17ae | 1457 | if ((names.domainname[0] != '\0') |
1458 | && (strcmp(names.domainname, "(none)") != 0)) { | |
1459 | len = strlen(names.domainname); | |
1460 | if (len > BGP_MAX_HOSTNAME) | |
1461 | len = BGP_MAX_HOSTNAME; | |
1462 | ||
1463 | stream_putc(s, len); | |
1464 | stream_put(s, names.domainname, len); | |
1465 | } else | |
04b6bdc0 | 1466 | #endif |
d62a17ae | 1467 | { |
1468 | stream_putc(s, 0); /* 0 length */ | |
1469 | } | |
04b6bdc0 | 1470 | |
d62a17ae | 1471 | /* Set the lengths straight */ |
1472 | len = stream_get_endp(s) - rcapp - 1; | |
1473 | stream_putc_at(s, rcapp, len); | |
1474 | len = stream_get_endp(s) - capp - 1; | |
1475 | stream_putc_at(s, capp, len); | |
04b6bdc0 | 1476 | |
d62a17ae | 1477 | if (bgp_debug_neighbor_events(peer)) |
60060acc | 1478 | #ifdef HAVE_STRUCT_UTSNAME_DOMAINNAME |
d62a17ae | 1479 | zlog_debug( |
1480 | "%s Sending hostname cap with hn = %s, dn = %s", | |
1481 | peer->host, names.nodename, names.domainname); | |
60060acc | 1482 | #else |
d62a17ae | 1483 | zlog_debug("%s Sending hostname cap with hn = %s", |
1484 | peer->host, names.nodename); | |
60060acc | 1485 | #endif |
d62a17ae | 1486 | } |
1487 | ||
1488 | /* Sending base graceful-restart capability irrespective of the config | |
1489 | */ | |
1490 | SET_FLAG(peer->cap, PEER_CAP_RESTART_ADV); | |
1491 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1492 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1493 | stream_putc(s, 0); /* Capability Length */ | |
1494 | stream_putc(s, CAPABILITY_CODE_RESTART); | |
1495 | rcapp = stream_get_endp(s); /* Set Restart Capability Len Pointer */ | |
1496 | stream_putc(s, 0); | |
1497 | restart_time = peer->bgp->restart_time; | |
1498 | if (peer->bgp->t_startup) { | |
1499 | SET_FLAG(restart_time, RESTART_R_BIT); | |
1500 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_ADV); | |
1501 | } | |
1502 | stream_putw(s, restart_time); | |
1503 | ||
1504 | /* Send address-family specific graceful-restart capability only when GR | |
1505 | config | |
1506 | is present */ | |
1507 | if (bgp_flag_check(peer->bgp, BGP_FLAG_GRACEFUL_RESTART)) { | |
1508 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1509 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
1510 | if (peer->afc[afi][safi]) { | |
1511 | /* Convert AFI, SAFI to values for | |
1512 | * packet. */ | |
1513 | bgp_map_afi_safi_int2iana( | |
1514 | afi, safi, &pkt_afi, &pkt_safi); | |
1515 | stream_putw(s, pkt_afi); | |
1516 | stream_putc(s, pkt_safi); | |
1517 | if (bgp_flag_check( | |
1518 | peer->bgp, | |
1519 | BGP_FLAG_GR_PRESERVE_FWD)) | |
1520 | stream_putc(s, RESTART_F_BIT); | |
1521 | else | |
1522 | stream_putc(s, 0); | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | /* Total Graceful restart capability Len. */ | |
1527 | len = stream_get_endp(s) - rcapp - 1; | |
1528 | stream_putc_at(s, rcapp, len); | |
1529 | ||
1530 | /* Total Capability Len. */ | |
1531 | len = stream_get_endp(s) - capp - 1; | |
1532 | stream_putc_at(s, capp, len); | |
1533 | ||
1534 | /* Total Opt Parm Len. */ | |
1535 | len = stream_get_endp(s) - cp - 1; | |
1536 | stream_putc_at(s, cp, len); | |
718e3744 | 1537 | } |