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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" | |
14454c9f | 37 | #include "bgpd/bgp_errors.h" |
718e3744 | 38 | #include "bgpd/bgp_fsm.h" |
39 | #include "bgpd/bgp_packet.h" | |
40 | #include "bgpd/bgp_open.h" | |
0b2aa3a0 | 41 | #include "bgpd/bgp_aspath.h" |
538621f2 | 42 | #include "bgpd/bgp_vty.h" |
4a1ab8e4 | 43 | #include "bgpd/bgp_memory.h" |
538621f2 | 44 | |
718e3744 | 45 | /* BGP-4 Multiprotocol Extentions lead us to the complex world. We can |
46 | negotiate remote peer supports extentions or not. But if | |
47 | remote-peer doesn't supports negotiation process itself. We would | |
48 | like to do manual configuration. | |
49 | ||
50 | So there is many configurable point. First of all we want set each | |
51 | peer whether we send capability negotiation to the peer or not. | |
da88f402 | 52 | Next, if we send capability to the peer we want to set my capability |
718e3744 | 53 | inforation at each peer. */ |
54 | ||
9f049418 DS |
55 | void bgp_capability_vty_out(struct vty *vty, struct peer *peer, bool use_json, |
56 | json_object *json_neigh) | |
718e3744 | 57 | { |
d62a17ae | 58 | char *pnt; |
59 | char *end; | |
60 | struct capability_mp_data mpc; | |
61 | struct capability_header *hdr; | |
62 | json_object *json_cap = NULL; | |
63 | ||
64 | if (use_json) | |
65 | json_cap = json_object_new_object(); | |
66 | ||
67 | pnt = peer->notify.data; | |
68 | end = pnt + peer->notify.length; | |
69 | ||
70 | while (pnt < end) { | |
71 | if (pnt + sizeof(struct capability_mp_data) + 2 > end) | |
72 | return; | |
73 | ||
74 | hdr = (struct capability_header *)pnt; | |
75 | if (pnt + hdr->length + 2 > end) | |
76 | return; | |
77 | ||
78 | memcpy(&mpc, pnt + 2, sizeof(struct capability_mp_data)); | |
79 | ||
80 | if (hdr->code == CAPABILITY_CODE_MP) { | |
81 | afi_t afi; | |
82 | safi_t safi; | |
83 | ||
da3b87f8 | 84 | (void)bgp_map_afi_safi_iana2int(ntohs(mpc.afi), |
85 | mpc.safi, &afi, &safi); | |
86 | ||
d62a17ae | 87 | if (use_json) { |
88 | switch (afi) { | |
89 | case AFI_IP: | |
90 | json_object_string_add( | |
91 | json_cap, | |
92 | "capabilityErrorMultiProtocolAfi", | |
93 | "IPv4"); | |
94 | break; | |
95 | case AFI_IP6: | |
96 | json_object_string_add( | |
97 | json_cap, | |
98 | "capabilityErrorMultiProtocolAfi", | |
99 | "IPv6"); | |
100 | break; | |
101 | case AFI_L2VPN: | |
102 | json_object_string_add( | |
103 | json_cap, | |
104 | "capabilityErrorMultiProtocolAfi", | |
105 | "L2VPN"); | |
106 | break; | |
107 | default: | |
108 | json_object_int_add( | |
109 | json_cap, | |
110 | "capabilityErrorMultiProtocolAfiUnknown", | |
111 | ntohs(mpc.afi)); | |
112 | break; | |
113 | } | |
114 | switch (safi) { | |
115 | case SAFI_UNICAST: | |
116 | json_object_string_add( | |
117 | json_cap, | |
118 | "capabilityErrorMultiProtocolSafi", | |
119 | "unicast"); | |
120 | break; | |
121 | case SAFI_MULTICAST: | |
122 | json_object_string_add( | |
123 | json_cap, | |
124 | "capabilityErrorMultiProtocolSafi", | |
125 | "multicast"); | |
126 | break; | |
127 | case SAFI_LABELED_UNICAST: | |
128 | json_object_string_add( | |
129 | json_cap, | |
130 | "capabilityErrorMultiProtocolSafi", | |
131 | "labeled-unicast"); | |
132 | break; | |
133 | case SAFI_MPLS_VPN: | |
134 | json_object_string_add( | |
135 | json_cap, | |
136 | "capabilityErrorMultiProtocolSafi", | |
137 | "MPLS-labeled VPN"); | |
138 | break; | |
139 | case SAFI_ENCAP: | |
140 | json_object_string_add( | |
141 | json_cap, | |
142 | "capabilityErrorMultiProtocolSafi", | |
143 | "encap"); | |
144 | break; | |
145 | case SAFI_EVPN: | |
146 | json_object_string_add( | |
147 | json_cap, | |
148 | "capabilityErrorMultiProtocolSafi", | |
149 | "EVPN"); | |
150 | break; | |
7c40bf39 | 151 | case SAFI_FLOWSPEC: |
152 | json_object_string_add( | |
153 | json_cap, | |
154 | "capabilityErrorMultiProtocolSafi", | |
155 | "flowspec"); | |
156 | break; | |
d62a17ae | 157 | default: |
158 | json_object_int_add( | |
159 | json_cap, | |
160 | "capabilityErrorMultiProtocolSafiUnknown", | |
161 | mpc.safi); | |
162 | break; | |
163 | } | |
164 | } else { | |
165 | vty_out(vty, | |
166 | " Capability error for: Multi protocol "); | |
167 | switch (afi) { | |
168 | case AFI_IP: | |
169 | vty_out(vty, "AFI IPv4, "); | |
170 | break; | |
171 | case AFI_IP6: | |
172 | vty_out(vty, "AFI IPv6, "); | |
173 | break; | |
174 | case AFI_L2VPN: | |
175 | vty_out(vty, "AFI L2VPN, "); | |
176 | break; | |
177 | default: | |
178 | vty_out(vty, "AFI Unknown %d, ", | |
179 | ntohs(mpc.afi)); | |
180 | break; | |
181 | } | |
182 | switch (safi) { | |
183 | case SAFI_UNICAST: | |
184 | vty_out(vty, "SAFI Unicast"); | |
185 | break; | |
186 | case SAFI_MULTICAST: | |
187 | vty_out(vty, "SAFI Multicast"); | |
188 | break; | |
189 | case SAFI_LABELED_UNICAST: | |
190 | vty_out(vty, "SAFI Labeled-unicast"); | |
191 | break; | |
192 | case SAFI_MPLS_VPN: | |
193 | vty_out(vty, "SAFI MPLS-labeled VPN"); | |
194 | break; | |
195 | case SAFI_ENCAP: | |
196 | vty_out(vty, "SAFI ENCAP"); | |
197 | break; | |
7c40bf39 | 198 | case SAFI_FLOWSPEC: |
199 | vty_out(vty, "SAFI FLOWSPEC"); | |
200 | break; | |
d62a17ae | 201 | case SAFI_EVPN: |
202 | vty_out(vty, "SAFI EVPN"); | |
203 | break; | |
204 | default: | |
205 | vty_out(vty, "SAFI Unknown %d ", | |
206 | mpc.safi); | |
207 | break; | |
208 | } | |
209 | vty_out(vty, "\n"); | |
210 | } | |
211 | } else if (hdr->code >= 128) { | |
212 | if (use_json) | |
213 | json_object_int_add( | |
214 | json_cap, | |
215 | "capabilityErrorVendorSpecificCapabilityCode", | |
216 | hdr->code); | |
217 | else | |
218 | vty_out(vty, | |
219 | " Capability error: vendor specific capability code %d", | |
220 | hdr->code); | |
221 | } else { | |
222 | if (use_json) | |
223 | json_object_int_add( | |
224 | json_cap, | |
225 | "capabilityErrorUnknownCapabilityCode", | |
226 | hdr->code); | |
227 | else | |
228 | vty_out(vty, | |
229 | " Capability error: unknown capability code %d", | |
230 | hdr->code); | |
231 | } | |
232 | pnt += hdr->length + 2; | |
233 | } | |
234 | if (use_json) | |
235 | json_object_object_add(json_neigh, "capabilityErrors", | |
236 | json_cap); | |
718e3744 | 237 | } |
238 | ||
d62a17ae | 239 | static void bgp_capability_mp_data(struct stream *s, |
240 | struct capability_mp_data *mpc) | |
718e3744 | 241 | { |
d62a17ae | 242 | mpc->afi = stream_getw(s); |
243 | mpc->reserved = stream_getc(s); | |
244 | mpc->safi = stream_getc(s); | |
6d58272b | 245 | } |
718e3744 | 246 | |
6d58272b | 247 | /* Set negotiated capability value. */ |
d62a17ae | 248 | static int bgp_capability_mp(struct peer *peer, struct capability_header *hdr) |
6d58272b | 249 | { |
d62a17ae | 250 | struct capability_mp_data mpc; |
251 | struct stream *s = BGP_INPUT(peer); | |
252 | afi_t afi; | |
253 | safi_t safi; | |
254 | ||
255 | /* Verify length is 4 */ | |
256 | if (hdr->length != 4) { | |
065eaa36 | 257 | flog_warn( |
e50f7cfd | 258 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 259 | "MP Cap: Received invalid length %d, non-multiple of 4", |
260 | hdr->length); | |
261 | return -1; | |
262 | } | |
263 | ||
264 | bgp_capability_mp_data(s, &mpc); | |
265 | ||
266 | if (bgp_debug_neighbor_events(peer)) | |
748a041f DS |
267 | zlog_debug("%s OPEN has MP_EXT CAP for afi/safi: %s/%s", |
268 | peer->host, iana_afi2str(mpc.afi), | |
269 | iana_safi2str(mpc.safi)); | |
d62a17ae | 270 | |
271 | /* Convert AFI, SAFI to internal values, check. */ | |
272 | if (bgp_map_afi_safi_iana2int(mpc.afi, mpc.safi, &afi, &safi)) | |
273 | return -1; | |
274 | ||
275 | /* Now safi remapped, and afi/safi are valid array indices */ | |
276 | peer->afc_recv[afi][safi] = 1; | |
277 | ||
278 | if (peer->afc[afi][safi]) | |
279 | peer->afc_nego[afi][safi] = 1; | |
280 | else | |
281 | return -1; | |
282 | ||
283 | return 0; | |
718e3744 | 284 | } |
285 | ||
d62a17ae | 286 | static void bgp_capability_orf_not_support(struct peer *peer, iana_afi_t afi, |
d7c0a89a QY |
287 | iana_safi_t safi, uint8_t type, |
288 | uint8_t mode) | |
718e3744 | 289 | { |
d62a17ae | 290 | if (bgp_debug_neighbor_events(peer)) |
291 | zlog_debug( | |
292 | "%s Addr-family %d/%d has ORF type/mode %d/%d not supported", | |
293 | peer->host, afi, safi, type, mode); | |
718e3744 | 294 | } |
295 | ||
d62a17ae | 296 | static const struct message orf_type_str[] = { |
297 | {ORF_TYPE_PREFIX, "Prefixlist"}, | |
298 | {ORF_TYPE_PREFIX_OLD, "Prefixlist (old)"}, | |
299 | {0}}; | |
6d58272b | 300 | |
d62a17ae | 301 | static const struct message orf_mode_str[] = {{ORF_MODE_RECEIVE, "Receive"}, |
302 | {ORF_MODE_SEND, "Send"}, | |
303 | {ORF_MODE_BOTH, "Both"}, | |
304 | {0}}; | |
6d58272b | 305 | |
d62a17ae | 306 | static int bgp_capability_orf_entry(struct peer *peer, |
307 | struct capability_header *hdr) | |
718e3744 | 308 | { |
d62a17ae | 309 | struct stream *s = BGP_INPUT(peer); |
310 | struct capability_mp_data mpc; | |
d7c0a89a | 311 | uint8_t num; |
d62a17ae | 312 | iana_afi_t pkt_afi; |
313 | afi_t afi; | |
5c525538 RW |
314 | iana_safi_t pkt_safi; |
315 | safi_t safi; | |
d7c0a89a QY |
316 | uint8_t type; |
317 | uint8_t mode; | |
318 | uint16_t sm_cap = 0; /* capability send-mode receive */ | |
319 | uint16_t rm_cap = 0; /* capability receive-mode receive */ | |
d62a17ae | 320 | int i; |
321 | ||
322 | /* ORF Entry header */ | |
323 | bgp_capability_mp_data(s, &mpc); | |
324 | num = stream_getc(s); | |
325 | pkt_afi = mpc.afi; | |
326 | pkt_safi = mpc.safi; | |
327 | ||
328 | if (bgp_debug_neighbor_events(peer)) | |
748a041f DS |
329 | zlog_debug("%s ORF Cap entry for afi/safi: %s/%s", peer->host, |
330 | iana_afi2str(mpc.afi), iana_safi2str(mpc.safi)); | |
d62a17ae | 331 | |
332 | /* Convert AFI, SAFI to internal values, check. */ | |
333 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
334 | zlog_info( | |
335 | "%s Addr-family %d/%d not supported." | |
336 | " Ignoring the ORF capability", | |
337 | peer->host, pkt_afi, pkt_safi); | |
338 | return 0; | |
718e3744 | 339 | } |
d62a17ae | 340 | |
341 | mpc.afi = pkt_afi; | |
342 | mpc.safi = safi; | |
343 | ||
344 | /* validate number field */ | |
345 | if (CAPABILITY_CODE_ORF_LEN + (num * 2) > hdr->length) { | |
346 | zlog_info( | |
347 | "%s ORF Capability entry length error," | |
348 | " Cap length %u, num %u", | |
349 | peer->host, hdr->length, num); | |
350 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
351 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
352 | return -1; | |
718e3744 | 353 | } |
354 | ||
d62a17ae | 355 | for (i = 0; i < num; i++) { |
356 | type = stream_getc(s); | |
357 | mode = stream_getc(s); | |
358 | ||
359 | /* ORF Mode error check */ | |
360 | switch (mode) { | |
361 | case ORF_MODE_BOTH: | |
362 | case ORF_MODE_SEND: | |
363 | case ORF_MODE_RECEIVE: | |
364 | break; | |
365 | default: | |
366 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
367 | type, mode); | |
368 | continue; | |
369 | } | |
370 | /* ORF Type and afi/safi error checks */ | |
371 | /* capcode versus type */ | |
372 | switch (hdr->code) { | |
373 | case CAPABILITY_CODE_ORF: | |
374 | switch (type) { | |
375 | case ORF_TYPE_PREFIX: | |
376 | break; | |
377 | default: | |
378 | bgp_capability_orf_not_support( | |
379 | peer, pkt_afi, pkt_safi, type, mode); | |
380 | continue; | |
381 | } | |
382 | break; | |
383 | case CAPABILITY_CODE_ORF_OLD: | |
384 | switch (type) { | |
385 | case ORF_TYPE_PREFIX_OLD: | |
386 | break; | |
387 | default: | |
388 | bgp_capability_orf_not_support( | |
389 | peer, pkt_afi, pkt_safi, type, mode); | |
390 | continue; | |
391 | } | |
392 | break; | |
393 | default: | |
394 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
395 | type, mode); | |
396 | continue; | |
397 | } | |
398 | ||
399 | /* AFI vs SAFI */ | |
400 | if (!((afi == AFI_IP && safi == SAFI_UNICAST) | |
401 | || (afi == AFI_IP && safi == SAFI_MULTICAST) | |
402 | || (afi == AFI_IP6 && safi == SAFI_UNICAST))) { | |
403 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
404 | type, mode); | |
405 | continue; | |
406 | } | |
407 | ||
408 | if (bgp_debug_neighbor_events(peer)) | |
409 | zlog_debug( | |
410 | "%s OPEN has %s ORF capability" | |
748a041f | 411 | " as %s for afi/safi: %s/%s", |
d62a17ae | 412 | peer->host, |
413 | lookup_msg(orf_type_str, type, NULL), | |
748a041f DS |
414 | lookup_msg(orf_mode_str, mode, NULL), |
415 | iana_afi2str(pkt_afi), iana_safi2str(pkt_safi)); | |
d62a17ae | 416 | |
417 | if (hdr->code == CAPABILITY_CODE_ORF) { | |
418 | sm_cap = PEER_CAP_ORF_PREFIX_SM_RCV; | |
419 | rm_cap = PEER_CAP_ORF_PREFIX_RM_RCV; | |
420 | } else if (hdr->code == CAPABILITY_CODE_ORF_OLD) { | |
421 | sm_cap = PEER_CAP_ORF_PREFIX_SM_OLD_RCV; | |
422 | rm_cap = PEER_CAP_ORF_PREFIX_RM_OLD_RCV; | |
423 | } else { | |
424 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
425 | type, mode); | |
426 | continue; | |
427 | } | |
428 | ||
429 | switch (mode) { | |
430 | case ORF_MODE_BOTH: | |
431 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
432 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
433 | break; | |
434 | case ORF_MODE_SEND: | |
435 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
436 | break; | |
437 | case ORF_MODE_RECEIVE: | |
438 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
439 | break; | |
440 | } | |
718e3744 | 441 | } |
d62a17ae | 442 | return 0; |
718e3744 | 443 | } |
444 | ||
d62a17ae | 445 | static int bgp_capability_restart(struct peer *peer, |
446 | struct capability_header *caphdr) | |
6d58272b | 447 | { |
d62a17ae | 448 | struct stream *s = BGP_INPUT(peer); |
d7c0a89a | 449 | uint16_t restart_flag_time; |
d62a17ae | 450 | size_t end = stream_get_getp(s) + caphdr->length; |
451 | ||
452 | /* Verify length is a multiple of 4 */ | |
453 | if ((caphdr->length - 2) % 4) { | |
065eaa36 | 454 | flog_warn( |
e50f7cfd | 455 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 456 | "Restart Cap: Received invalid length %d, non-multiple of 4", |
457 | caphdr->length); | |
458 | return -1; | |
459 | } | |
460 | ||
461 | SET_FLAG(peer->cap, PEER_CAP_RESTART_RCV); | |
462 | restart_flag_time = stream_getw(s); | |
463 | if (CHECK_FLAG(restart_flag_time, RESTART_R_BIT)) | |
464 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV); | |
d7b3cda6 | 465 | else |
466 | UNSET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV); | |
d62a17ae | 467 | |
468 | UNSET_FLAG(restart_flag_time, 0xF000); | |
469 | peer->v_gr_restart = restart_flag_time; | |
470 | ||
471 | if (bgp_debug_neighbor_events(peer)) { | |
472 | zlog_debug("%s OPEN has Graceful Restart capability", | |
473 | peer->host); | |
474 | zlog_debug("%s Peer has%srestarted. Restart Time : %d", | |
475 | peer->host, | |
476 | CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV) | |
477 | ? " " | |
478 | : " not ", | |
479 | peer->v_gr_restart); | |
480 | } | |
481 | ||
482 | while (stream_get_getp(s) + 4 <= end) { | |
483 | afi_t afi; | |
484 | safi_t safi; | |
485 | iana_afi_t pkt_afi = stream_getw(s); | |
5c525538 | 486 | iana_safi_t pkt_safi = stream_getc(s); |
d7c0a89a | 487 | uint8_t flag = stream_getc(s); |
d62a17ae | 488 | |
489 | /* Convert AFI, SAFI to internal values, check. */ | |
490 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
491 | if (bgp_debug_neighbor_events(peer)) | |
492 | zlog_debug( | |
748a041f | 493 | "%s Addr-family %s/%s(afi/safi) not supported." |
d62a17ae | 494 | " Ignore the Graceful Restart capability for this AFI/SAFI", |
748a041f DS |
495 | peer->host, iana_afi2str(pkt_afi), |
496 | iana_safi2str(pkt_safi)); | |
d62a17ae | 497 | } else if (!peer->afc[afi][safi]) { |
498 | if (bgp_debug_neighbor_events(peer)) | |
499 | zlog_debug( | |
748a041f | 500 | "%s Addr-family %s/%s(afi/safi) not enabled." |
d62a17ae | 501 | " Ignore the Graceful Restart capability", |
748a041f DS |
502 | peer->host, iana_afi2str(pkt_afi), |
503 | iana_safi2str(pkt_safi)); | |
d62a17ae | 504 | } else { |
505 | if (bgp_debug_neighbor_events(peer)) | |
506 | zlog_debug( | |
507 | "%s Address family %s is%spreserved", | |
5cb5f4d0 | 508 | peer->host, get_afi_safi_str(afi, safi, false), |
d62a17ae | 509 | CHECK_FLAG( |
510 | peer->af_cap[afi][safi], | |
511 | PEER_CAP_RESTART_AF_PRESERVE_RCV) | |
512 | ? " " | |
513 | : " not "); | |
514 | ||
515 | SET_FLAG(peer->af_cap[afi][safi], | |
516 | PEER_CAP_RESTART_AF_RCV); | |
517 | if (CHECK_FLAG(flag, RESTART_F_BIT)) | |
518 | SET_FLAG(peer->af_cap[afi][safi], | |
519 | PEER_CAP_RESTART_AF_PRESERVE_RCV); | |
520 | } | |
521 | } | |
522 | return 0; | |
6d58272b | 523 | } |
718e3744 | 524 | |
14051b36 | 525 | /* Unlike other capability parsing routines, this one returns 0 on error */ |
d62a17ae | 526 | static as_t bgp_capability_as4(struct peer *peer, struct capability_header *hdr) |
0b2aa3a0 | 527 | { |
d62a17ae | 528 | SET_FLAG(peer->cap, PEER_CAP_AS4_RCV); |
529 | ||
530 | if (hdr->length != CAPABILITY_CODE_AS4_LEN) { | |
e50f7cfd | 531 | flog_err(EC_BGP_PKT_OPEN, |
1c50c1c0 QY |
532 | "%s AS4 capability has incorrect data length %d", |
533 | peer->host, hdr->length); | |
d62a17ae | 534 | return 0; |
535 | } | |
536 | ||
537 | as_t as4 = stream_getl(BGP_INPUT(peer)); | |
538 | ||
539 | if (BGP_DEBUG(as4, AS4)) | |
540 | zlog_debug( | |
541 | "%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u", | |
542 | peer->host, as4); | |
543 | return as4; | |
0b2aa3a0 PJ |
544 | } |
545 | ||
d62a17ae | 546 | static int bgp_capability_addpath(struct peer *peer, |
547 | struct capability_header *hdr) | |
a82478b9 | 548 | { |
d62a17ae | 549 | struct stream *s = BGP_INPUT(peer); |
550 | size_t end = stream_get_getp(s) + hdr->length; | |
551 | ||
552 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_RCV); | |
553 | ||
554 | /* Verify length is a multiple of 4 */ | |
555 | if (hdr->length % 4) { | |
065eaa36 | 556 | flog_warn( |
e50f7cfd | 557 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 558 | "Add Path: Received invalid length %d, non-multiple of 4", |
559 | hdr->length); | |
560 | return -1; | |
561 | } | |
562 | ||
563 | while (stream_get_getp(s) + 4 <= end) { | |
564 | afi_t afi; | |
565 | safi_t safi; | |
566 | iana_afi_t pkt_afi = stream_getw(s); | |
5c525538 | 567 | iana_safi_t pkt_safi = stream_getc(s); |
d7c0a89a | 568 | uint8_t send_receive = stream_getc(s); |
d62a17ae | 569 | |
570 | if (bgp_debug_neighbor_events(peer)) | |
571 | zlog_debug( | |
748a041f DS |
572 | "%s OPEN has AddPath CAP for afi/safi: %s/%s%s%s", |
573 | peer->host, iana_afi2str(pkt_afi), | |
574 | iana_safi2str(pkt_safi), | |
d62a17ae | 575 | (send_receive & BGP_ADDPATH_RX) ? ", receive" |
576 | : "", | |
577 | (send_receive & BGP_ADDPATH_TX) ? ", transmit" | |
578 | : ""); | |
579 | ||
580 | /* Convert AFI, SAFI to internal values, check. */ | |
581 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
582 | if (bgp_debug_neighbor_events(peer)) | |
583 | zlog_debug( | |
748a041f | 584 | "%s Addr-family %s/%s(afi/safi) not supported." |
d62a17ae | 585 | " Ignore the Addpath Attribute for this AFI/SAFI", |
748a041f DS |
586 | peer->host, iana_afi2str(pkt_afi), |
587 | iana_safi2str(pkt_safi)); | |
d62a17ae | 588 | continue; |
589 | } else if (!peer->afc[afi][safi]) { | |
590 | if (bgp_debug_neighbor_events(peer)) | |
591 | zlog_debug( | |
748a041f | 592 | "%s Addr-family %s/%s(afi/safi) not enabled." |
d62a17ae | 593 | " Ignore the AddPath capability for this AFI/SAFI", |
748a041f DS |
594 | peer->host, iana_afi2str(pkt_afi), |
595 | iana_safi2str(pkt_safi)); | |
d62a17ae | 596 | continue; |
597 | } | |
598 | ||
599 | if (send_receive & BGP_ADDPATH_RX) | |
600 | SET_FLAG(peer->af_cap[afi][safi], | |
601 | PEER_CAP_ADDPATH_AF_RX_RCV); | |
602 | ||
603 | if (send_receive & BGP_ADDPATH_TX) | |
604 | SET_FLAG(peer->af_cap[afi][safi], | |
605 | PEER_CAP_ADDPATH_AF_TX_RCV); | |
606 | } | |
607 | ||
608 | return 0; | |
a82478b9 DS |
609 | } |
610 | ||
d62a17ae | 611 | static int bgp_capability_enhe(struct peer *peer, struct capability_header *hdr) |
8a92a8a0 | 612 | { |
d62a17ae | 613 | struct stream *s = BGP_INPUT(peer); |
614 | size_t end = stream_get_getp(s) + hdr->length; | |
615 | ||
616 | /* Verify length is a multiple of 4 */ | |
617 | if (hdr->length % 6) { | |
065eaa36 | 618 | flog_warn( |
e50f7cfd | 619 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 620 | "Extended NH: Received invalid length %d, non-multiple of 6", |
621 | hdr->length); | |
622 | return -1; | |
623 | } | |
624 | ||
625 | while (stream_get_getp(s) + 6 <= end) { | |
626 | iana_afi_t pkt_afi = stream_getw(s); | |
627 | afi_t afi; | |
5c525538 RW |
628 | iana_safi_t pkt_safi = stream_getw(s); |
629 | safi_t safi; | |
d62a17ae | 630 | iana_afi_t pkt_nh_afi = stream_getw(s); |
631 | afi_t nh_afi; | |
632 | ||
633 | if (bgp_debug_neighbor_events(peer)) | |
634 | zlog_debug( | |
748a041f DS |
635 | "%s Received with afi/safi/next-hop afi: %s/%s/%u", |
636 | peer->host, iana_afi2str(pkt_afi), | |
637 | iana_safi2str(pkt_safi), pkt_nh_afi); | |
d62a17ae | 638 | |
639 | /* Convert AFI, SAFI to internal values, check. */ | |
640 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
641 | if (bgp_debug_neighbor_events(peer)) | |
642 | zlog_debug( | |
748a041f | 643 | "%s Addr-family %s/%s(afi/safi) not supported." |
d62a17ae | 644 | " Ignore the ENHE Attribute for this AFI/SAFI", |
748a041f DS |
645 | peer->host, iana_afi2str(pkt_afi), |
646 | iana_safi2str(pkt_safi)); | |
d62a17ae | 647 | continue; |
648 | } | |
649 | ||
650 | /* RFC 5549 specifies use of this capability only for IPv4 AFI, | |
651 | * with | |
652 | * the Nexthop AFI being IPv6. A future spec may introduce other | |
653 | * possibilities, so we ignore other values with a log. Also, | |
654 | * only | |
655 | * SAFI_UNICAST and SAFI_LABELED_UNICAST are currently supported | |
656 | * (and expected). | |
657 | */ | |
658 | nh_afi = afi_iana2int(pkt_nh_afi); | |
659 | ||
660 | if (afi != AFI_IP || nh_afi != AFI_IP6 | |
770df5fd | 661 | || !(safi == SAFI_UNICAST || safi == SAFI_MPLS_VPN |
d62a17ae | 662 | || safi == SAFI_LABELED_UNICAST)) { |
065eaa36 | 663 | flog_warn( |
e50f7cfd | 664 | EC_BGP_CAPABILITY_INVALID_DATA, |
748a041f | 665 | "%s Unexpected afi/safi/next-hop afi: %s/%s/%u " |
d62a17ae | 666 | "in Extended Next-hop capability, ignoring", |
748a041f DS |
667 | peer->host, iana_afi2str(pkt_afi), |
668 | iana_safi2str(pkt_safi), pkt_nh_afi); | |
d62a17ae | 669 | continue; |
670 | } | |
671 | ||
672 | SET_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV); | |
673 | ||
674 | if (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_ADV)) | |
675 | SET_FLAG(peer->af_cap[afi][safi], | |
676 | PEER_CAP_ENHE_AF_NEGO); | |
677 | } | |
678 | ||
679 | SET_FLAG(peer->cap, PEER_CAP_ENHE_RCV); | |
680 | ||
681 | return 0; | |
8a92a8a0 DS |
682 | } |
683 | ||
d62a17ae | 684 | static int bgp_capability_hostname(struct peer *peer, |
685 | struct capability_header *hdr) | |
04b6bdc0 | 686 | { |
d62a17ae | 687 | struct stream *s = BGP_INPUT(peer); |
688 | char str[BGP_MAX_HOSTNAME + 1]; | |
689 | size_t end = stream_get_getp(s) + hdr->length; | |
d7c0a89a | 690 | uint8_t len; |
d62a17ae | 691 | |
692 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_RCV); | |
693 | ||
694 | len = stream_getc(s); | |
695 | if (stream_get_getp(s) + len > end) { | |
065eaa36 | 696 | flog_warn( |
e50f7cfd | 697 | EC_BGP_CAPABILITY_INVALID_DATA, |
d62a17ae | 698 | "%s: Received malformed hostname capability from peer %s", |
15569c58 | 699 | __func__, peer->host); |
d62a17ae | 700 | return -1; |
701 | } | |
702 | ||
703 | if (len > BGP_MAX_HOSTNAME) { | |
704 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
705 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
706 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
707 | } else if (len) | |
708 | stream_get(str, s, len); | |
709 | ||
710 | if (len) { | |
711 | str[len] = '\0'; | |
712 | ||
e1b36e13 QY |
713 | XFREE(MTYPE_BGP_PEER_HOST, peer->hostname); |
714 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); | |
d62a17ae | 715 | |
716 | peer->hostname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); | |
717 | } | |
718 | ||
719 | if (stream_get_getp(s) + 1 > end) { | |
065eaa36 | 720 | flog_warn( |
e50f7cfd | 721 | EC_BGP_CAPABILITY_INVALID_DATA, |
d62a17ae | 722 | "%s: Received invalid domain name len (hostname capability) from peer %s", |
15569c58 | 723 | __func__, peer->host); |
d62a17ae | 724 | return -1; |
725 | } | |
726 | ||
727 | len = stream_getc(s); | |
728 | if (stream_get_getp(s) + len > end) { | |
065eaa36 | 729 | flog_warn( |
e50f7cfd | 730 | EC_BGP_CAPABILITY_INVALID_DATA, |
d62a17ae | 731 | "%s: Received runt domain name (hostname capability) from peer %s", |
15569c58 | 732 | __func__, peer->host); |
d62a17ae | 733 | return -1; |
734 | } | |
735 | ||
736 | if (len > BGP_MAX_HOSTNAME) { | |
737 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
738 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
739 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
740 | } else if (len) | |
741 | stream_get(str, s, len); | |
742 | ||
743 | if (len) { | |
744 | str[len] = '\0'; | |
aba5353c | 745 | |
e1b36e13 | 746 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); |
aba5353c | 747 | |
d62a17ae | 748 | peer->domainname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); |
749 | } | |
750 | ||
751 | if (bgp_debug_neighbor_events(peer)) { | |
752 | zlog_debug("%s received hostname %s, domainname %s", peer->host, | |
753 | peer->hostname, peer->domainname); | |
754 | } | |
755 | ||
756 | return 0; | |
04b6bdc0 DW |
757 | } |
758 | ||
d62a17ae | 759 | static const struct message capcode_str[] = { |
760 | {CAPABILITY_CODE_MP, "MultiProtocol Extensions"}, | |
761 | {CAPABILITY_CODE_REFRESH, "Route Refresh"}, | |
762 | {CAPABILITY_CODE_ORF, "Cooperative Route Filtering"}, | |
763 | {CAPABILITY_CODE_RESTART, "Graceful Restart"}, | |
764 | {CAPABILITY_CODE_AS4, "4-octet AS number"}, | |
765 | {CAPABILITY_CODE_ADDPATH, "AddPath"}, | |
766 | {CAPABILITY_CODE_DYNAMIC, "Dynamic"}, | |
767 | {CAPABILITY_CODE_ENHE, "Extended Next Hop Encoding"}, | |
768 | {CAPABILITY_CODE_DYNAMIC_OLD, "Dynamic (Old)"}, | |
769 | {CAPABILITY_CODE_REFRESH_OLD, "Route Refresh (Old)"}, | |
770 | {CAPABILITY_CODE_ORF_OLD, "ORF (Old)"}, | |
771 | {CAPABILITY_CODE_FQDN, "FQDN"}, | |
772 | {0}}; | |
6d58272b PJ |
773 | |
774 | /* Minimum sizes for length field of each cap (so not inc. the header) */ | |
d62a17ae | 775 | static const size_t cap_minsizes[] = { |
9d303b37 DL |
776 | [CAPABILITY_CODE_MP] = CAPABILITY_CODE_MP_LEN, |
777 | [CAPABILITY_CODE_REFRESH] = CAPABILITY_CODE_REFRESH_LEN, | |
778 | [CAPABILITY_CODE_ORF] = CAPABILITY_CODE_ORF_LEN, | |
779 | [CAPABILITY_CODE_RESTART] = CAPABILITY_CODE_RESTART_LEN, | |
780 | [CAPABILITY_CODE_AS4] = CAPABILITY_CODE_AS4_LEN, | |
781 | [CAPABILITY_CODE_ADDPATH] = CAPABILITY_CODE_ADDPATH_LEN, | |
782 | [CAPABILITY_CODE_DYNAMIC] = CAPABILITY_CODE_DYNAMIC_LEN, | |
783 | [CAPABILITY_CODE_DYNAMIC_OLD] = CAPABILITY_CODE_DYNAMIC_LEN, | |
784 | [CAPABILITY_CODE_ENHE] = CAPABILITY_CODE_ENHE_LEN, | |
785 | [CAPABILITY_CODE_REFRESH_OLD] = CAPABILITY_CODE_REFRESH_LEN, | |
786 | [CAPABILITY_CODE_ORF_OLD] = CAPABILITY_CODE_ORF_LEN, | |
787 | [CAPABILITY_CODE_FQDN] = CAPABILITY_CODE_MIN_FQDN_LEN, | |
6d58272b PJ |
788 | }; |
789 | ||
695ef95f PJ |
790 | /* value the capability must be a multiple of. |
791 | * 0-data capabilities won't be checked against this. | |
792 | * Other capabilities whose data doesn't fall on convenient boundaries for this | |
793 | * table should be set to 1. | |
794 | */ | |
d62a17ae | 795 | static const size_t cap_modsizes[] = { |
9d303b37 DL |
796 | [CAPABILITY_CODE_MP] = 4, |
797 | [CAPABILITY_CODE_REFRESH] = 1, | |
798 | [CAPABILITY_CODE_ORF] = 1, | |
799 | [CAPABILITY_CODE_RESTART] = 1, | |
800 | [CAPABILITY_CODE_AS4] = 4, | |
801 | [CAPABILITY_CODE_ADDPATH] = 4, | |
802 | [CAPABILITY_CODE_DYNAMIC] = 1, | |
803 | [CAPABILITY_CODE_DYNAMIC_OLD] = 1, | |
804 | [CAPABILITY_CODE_ENHE] = 6, | |
805 | [CAPABILITY_CODE_REFRESH_OLD] = 1, | |
806 | [CAPABILITY_CODE_ORF_OLD] = 1, | |
807 | [CAPABILITY_CODE_FQDN] = 1, | |
695ef95f PJ |
808 | }; |
809 | ||
3b381c32 AS |
810 | /** |
811 | * Parse given capability. | |
6d58272b | 812 | * XXX: This is reading into a stream, but not using stream API |
3b381c32 AS |
813 | * |
814 | * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol | |
815 | * capabilities were encountered. | |
6d58272b | 816 | */ |
d62a17ae | 817 | static int bgp_capability_parse(struct peer *peer, size_t length, |
d7c0a89a | 818 | int *mp_capability, uint8_t **error) |
6d58272b | 819 | { |
d62a17ae | 820 | int ret; |
821 | struct stream *s = BGP_INPUT(peer); | |
822 | size_t end = stream_get_getp(s) + length; | |
34aa7448 | 823 | uint16_t restart_flag_time = 0; |
d62a17ae | 824 | |
825 | assert(STREAM_READABLE(s) >= length); | |
826 | ||
827 | while (stream_get_getp(s) < end) { | |
828 | size_t start; | |
d7c0a89a | 829 | uint8_t *sp = stream_pnt(s); |
d62a17ae | 830 | struct capability_header caphdr; |
831 | ||
832 | ret = 0; | |
833 | /* We need at least capability code and capability length. */ | |
834 | if (stream_get_getp(s) + 2 > end) { | |
835 | zlog_info("%s Capability length error (< header)", | |
836 | peer->host); | |
837 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
838 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
839 | return -1; | |
840 | } | |
841 | ||
842 | caphdr.code = stream_getc(s); | |
843 | caphdr.length = stream_getc(s); | |
844 | start = stream_get_getp(s); | |
845 | ||
846 | /* Capability length check sanity check. */ | |
847 | if (start + caphdr.length > end) { | |
848 | zlog_info("%s Capability length error (< length)", | |
849 | peer->host); | |
850 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
851 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
852 | return -1; | |
853 | } | |
854 | ||
855 | if (bgp_debug_neighbor_events(peer)) | |
856 | zlog_debug("%s OPEN has %s capability (%u), length %u", | |
857 | peer->host, | |
858 | lookup_msg(capcode_str, caphdr.code, NULL), | |
859 | caphdr.code, caphdr.length); | |
860 | ||
861 | /* Length sanity check, type-specific, for known capabilities */ | |
862 | switch (caphdr.code) { | |
863 | case CAPABILITY_CODE_MP: | |
864 | case CAPABILITY_CODE_REFRESH: | |
865 | case CAPABILITY_CODE_REFRESH_OLD: | |
866 | case CAPABILITY_CODE_ORF: | |
867 | case CAPABILITY_CODE_ORF_OLD: | |
868 | case CAPABILITY_CODE_RESTART: | |
869 | case CAPABILITY_CODE_AS4: | |
870 | case CAPABILITY_CODE_ADDPATH: | |
871 | case CAPABILITY_CODE_DYNAMIC: | |
872 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
873 | case CAPABILITY_CODE_ENHE: | |
874 | case CAPABILITY_CODE_FQDN: | |
875 | /* Check length. */ | |
876 | if (caphdr.length < cap_minsizes[caphdr.code]) { | |
877 | zlog_info( | |
878 | "%s %s Capability length error: got %u," | |
879 | " expected at least %u", | |
880 | peer->host, | |
881 | lookup_msg(capcode_str, caphdr.code, | |
882 | NULL), | |
883 | caphdr.length, | |
884 | (unsigned)cap_minsizes[caphdr.code]); | |
885 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
886 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
887 | return -1; | |
888 | } | |
889 | if (caphdr.length | |
890 | && caphdr.length % cap_modsizes[caphdr.code] != 0) { | |
891 | zlog_info( | |
892 | "%s %s Capability length error: got %u," | |
893 | " expected a multiple of %u", | |
894 | peer->host, | |
895 | lookup_msg(capcode_str, caphdr.code, | |
896 | NULL), | |
897 | caphdr.length, | |
898 | (unsigned)cap_modsizes[caphdr.code]); | |
899 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
900 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
901 | return -1; | |
902 | } | |
903 | /* we deliberately ignore unknown codes, see below */ | |
904 | default: | |
905 | break; | |
906 | } | |
907 | ||
908 | switch (caphdr.code) { | |
909 | case CAPABILITY_CODE_MP: { | |
910 | *mp_capability = 1; | |
911 | ||
912 | /* Ignore capability when override-capability is set. */ | |
913 | if (!CHECK_FLAG(peer->flags, | |
914 | PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
915 | /* Set negotiated value. */ | |
916 | ret = bgp_capability_mp(peer, &caphdr); | |
917 | ||
918 | /* Unsupported Capability. */ | |
919 | if (ret < 0) { | |
920 | /* Store return data. */ | |
921 | memcpy(*error, sp, caphdr.length + 2); | |
922 | *error += caphdr.length + 2; | |
923 | } | |
924 | ret = 0; /* Don't return error for this */ | |
925 | } | |
926 | } break; | |
927 | case CAPABILITY_CODE_REFRESH: | |
928 | case CAPABILITY_CODE_REFRESH_OLD: { | |
929 | /* BGP refresh capability */ | |
930 | if (caphdr.code == CAPABILITY_CODE_REFRESH_OLD) | |
931 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV); | |
932 | else | |
933 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV); | |
934 | } break; | |
935 | case CAPABILITY_CODE_ORF: | |
936 | case CAPABILITY_CODE_ORF_OLD: | |
937 | ret = bgp_capability_orf_entry(peer, &caphdr); | |
938 | break; | |
939 | case CAPABILITY_CODE_RESTART: | |
940 | ret = bgp_capability_restart(peer, &caphdr); | |
941 | break; | |
942 | case CAPABILITY_CODE_DYNAMIC: | |
943 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
944 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV); | |
945 | break; | |
946 | case CAPABILITY_CODE_AS4: | |
947 | /* Already handled as a special-case parsing of the | |
948 | * capabilities | |
949 | * at the beginning of OPEN processing. So we care not a | |
950 | * jot | |
951 | * for the value really, only error case. | |
952 | */ | |
953 | if (!bgp_capability_as4(peer, &caphdr)) | |
954 | ret = -1; | |
955 | break; | |
956 | case CAPABILITY_CODE_ADDPATH: | |
957 | ret = bgp_capability_addpath(peer, &caphdr); | |
958 | break; | |
959 | case CAPABILITY_CODE_ENHE: | |
960 | ret = bgp_capability_enhe(peer, &caphdr); | |
961 | break; | |
962 | case CAPABILITY_CODE_FQDN: | |
963 | ret = bgp_capability_hostname(peer, &caphdr); | |
964 | break; | |
965 | default: | |
966 | if (caphdr.code > 128) { | |
967 | /* We don't send Notification for unknown vendor | |
968 | specific | |
969 | capabilities. It seems reasonable for now... | |
970 | */ | |
e50f7cfd | 971 | flog_warn(EC_BGP_CAPABILITY_VENDOR, |
065eaa36 | 972 | "%s Vendor specific capability %d", |
d62a17ae | 973 | peer->host, caphdr.code); |
974 | } else { | |
065eaa36 | 975 | flog_warn( |
e50f7cfd | 976 | EC_BGP_CAPABILITY_UNKNOWN, |
d62a17ae | 977 | "%s unrecognized capability code: %d - ignored", |
978 | peer->host, caphdr.code); | |
979 | memcpy(*error, sp, caphdr.length + 2); | |
980 | *error += caphdr.length + 2; | |
981 | } | |
982 | } | |
983 | ||
984 | if (ret < 0) { | |
985 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
986 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
987 | return -1; | |
988 | } | |
989 | if (stream_get_getp(s) != (start + caphdr.length)) { | |
990 | if (stream_get_getp(s) > (start + caphdr.length)) | |
065eaa36 | 991 | flog_warn( |
e50f7cfd | 992 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 993 | "%s Cap-parser for %s read past cap-length, %u!", |
994 | peer->host, | |
995 | lookup_msg(capcode_str, caphdr.code, | |
996 | NULL), | |
997 | caphdr.length); | |
998 | stream_set_getp(s, start + caphdr.length); | |
999 | } | |
34aa7448 | 1000 | |
1001 | if (!CHECK_FLAG(peer->cap, PEER_CAP_RESTART_RCV)) { | |
1002 | UNSET_FLAG(restart_flag_time, 0xF000); | |
1003 | peer->v_gr_restart = restart_flag_time; | |
1004 | } | |
718e3744 | 1005 | } |
d62a17ae | 1006 | return 0; |
718e3744 | 1007 | } |
1008 | ||
d62a17ae | 1009 | static int bgp_auth_parse(struct peer *peer, size_t length) |
718e3744 | 1010 | { |
d62a17ae | 1011 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, |
1012 | BGP_NOTIFY_OPEN_AUTH_FAILURE); | |
1013 | return -1; | |
718e3744 | 1014 | } |
1015 | ||
3dc339cd | 1016 | static bool strict_capability_same(struct peer *peer) |
718e3744 | 1017 | { |
d62a17ae | 1018 | int i, j; |
718e3744 | 1019 | |
d62a17ae | 1020 | for (i = AFI_IP; i < AFI_MAX; i++) |
1021 | for (j = SAFI_UNICAST; j < SAFI_MAX; j++) | |
1022 | if (peer->afc[i][j] != peer->afc_nego[i][j]) | |
3dc339cd DA |
1023 | return false; |
1024 | return true; | |
718e3744 | 1025 | } |
1026 | ||
0b2aa3a0 PJ |
1027 | /* peek into option, stores ASN to *as4 if the AS4 capability was found. |
1028 | * Returns 0 if no as4 found, as4cap value otherwise. | |
1029 | */ | |
d7c0a89a | 1030 | as_t peek_for_as4_capability(struct peer *peer, uint8_t length) |
0b2aa3a0 | 1031 | { |
d62a17ae | 1032 | struct stream *s = BGP_INPUT(peer); |
1033 | size_t orig_getp = stream_get_getp(s); | |
1034 | size_t end = orig_getp + length; | |
1035 | as_t as4 = 0; | |
1036 | ||
1037 | if (BGP_DEBUG(as4, AS4)) | |
4cb5e18b | 1038 | zlog_debug( |
d62a17ae | 1039 | "%s [AS4] rcv OPEN w/ OPTION parameter len: %u," |
1040 | " peeking for as4", | |
1041 | peer->host, length); | |
1042 | /* the error cases we DONT handle, we ONLY try to read as4 out of | |
1043 | * correctly formatted options. | |
1044 | */ | |
1045 | while (stream_get_getp(s) < end) { | |
d7c0a89a QY |
1046 | uint8_t opt_type; |
1047 | uint8_t opt_length; | |
d62a17ae | 1048 | |
1049 | /* Check the length. */ | |
1050 | if (stream_get_getp(s) + 2 > end) | |
1051 | goto end; | |
1052 | ||
1053 | /* Fetch option type and length. */ | |
1054 | opt_type = stream_getc(s); | |
1055 | opt_length = stream_getc(s); | |
1056 | ||
1057 | /* Option length check. */ | |
1058 | if (stream_get_getp(s) + opt_length > end) | |
1059 | goto end; | |
1060 | ||
1061 | if (opt_type == BGP_OPEN_OPT_CAP) { | |
1062 | unsigned long capd_start = stream_get_getp(s); | |
1063 | unsigned long capd_end = capd_start + opt_length; | |
1064 | ||
1065 | assert(capd_end <= end); | |
1066 | ||
1067 | while (stream_get_getp(s) < capd_end) { | |
1068 | struct capability_header hdr; | |
1069 | ||
1070 | if (stream_get_getp(s) + 2 > capd_end) | |
1071 | goto end; | |
1072 | ||
1073 | hdr.code = stream_getc(s); | |
1074 | hdr.length = stream_getc(s); | |
1075 | ||
1076 | if ((stream_get_getp(s) + hdr.length) | |
1077 | > capd_end) | |
1078 | goto end; | |
1079 | ||
1080 | if (hdr.code == CAPABILITY_CODE_AS4) { | |
1081 | if (BGP_DEBUG(as4, AS4)) | |
4cb5e18b | 1082 | zlog_debug( |
d62a17ae | 1083 | "[AS4] found AS4 capability, about to parse"); |
1084 | as4 = bgp_capability_as4(peer, &hdr); | |
1085 | ||
1086 | goto end; | |
1087 | } | |
1088 | stream_forward_getp(s, hdr.length); | |
1089 | } | |
1090 | } | |
0b2aa3a0 | 1091 | } |
0b2aa3a0 PJ |
1092 | |
1093 | end: | |
d62a17ae | 1094 | stream_set_getp(s, orig_getp); |
1095 | return as4; | |
0b2aa3a0 PJ |
1096 | } |
1097 | ||
3b381c32 AS |
1098 | /** |
1099 | * Parse open option. | |
1100 | * | |
1101 | * @param[out] mp_capability @see bgp_capability_parse() for semantics. | |
1102 | */ | |
d7c0a89a | 1103 | int bgp_open_option_parse(struct peer *peer, uint8_t length, int *mp_capability) |
718e3744 | 1104 | { |
d62a17ae | 1105 | int ret = 0; |
d7c0a89a QY |
1106 | uint8_t *error; |
1107 | uint8_t error_data[BGP_MAX_PACKET_SIZE]; | |
d62a17ae | 1108 | struct stream *s = BGP_INPUT(peer); |
1109 | size_t end = stream_get_getp(s) + length; | |
1110 | ||
1111 | error = error_data; | |
1112 | ||
1113 | if (bgp_debug_neighbor_events(peer)) | |
1114 | zlog_debug("%s rcv OPEN w/ OPTION parameter len: %u", | |
1115 | peer->host, length); | |
1116 | ||
1117 | while (stream_get_getp(s) < end) { | |
d7c0a89a QY |
1118 | uint8_t opt_type; |
1119 | uint8_t opt_length; | |
d62a17ae | 1120 | |
1121 | /* Must have at least an OPEN option header */ | |
1122 | if (STREAM_READABLE(s) < 2) { | |
1123 | zlog_info("%s Option length error", peer->host); | |
1124 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1125 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1126 | return -1; | |
1127 | } | |
1128 | ||
1129 | /* Fetch option type and length. */ | |
1130 | opt_type = stream_getc(s); | |
1131 | opt_length = stream_getc(s); | |
1132 | ||
1133 | /* Option length check. */ | |
1134 | if (STREAM_READABLE(s) < opt_length) { | |
1135 | zlog_info("%s Option length error", peer->host); | |
1136 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1137 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1138 | return -1; | |
1139 | } | |
1140 | ||
1141 | if (bgp_debug_neighbor_events(peer)) | |
1142 | zlog_debug( | |
1143 | "%s rcvd OPEN w/ optional parameter type %u (%s) len %u", | |
1144 | peer->host, opt_type, | |
1145 | opt_type == BGP_OPEN_OPT_AUTH | |
1146 | ? "Authentication" | |
1147 | : opt_type == BGP_OPEN_OPT_CAP | |
1148 | ? "Capability" | |
1149 | : "Unknown", | |
1150 | opt_length); | |
1151 | ||
1152 | switch (opt_type) { | |
1153 | case BGP_OPEN_OPT_AUTH: | |
1154 | ret = bgp_auth_parse(peer, opt_length); | |
1155 | break; | |
1156 | case BGP_OPEN_OPT_CAP: | |
1157 | ret = bgp_capability_parse(peer, opt_length, | |
1158 | mp_capability, &error); | |
1159 | break; | |
1160 | default: | |
1161 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1162 | BGP_NOTIFY_OPEN_UNSUP_PARAM); | |
1163 | ret = -1; | |
1164 | break; | |
1165 | } | |
1166 | ||
1167 | /* Parse error. To accumulate all unsupported capability codes, | |
1168 | bgp_capability_parse does not return -1 when encounter | |
1169 | unsupported capability code. To detect that, please check | |
1170 | error and erro_data pointer, like below. */ | |
1171 | if (ret < 0) | |
1172 | return -1; | |
718e3744 | 1173 | } |
1174 | ||
d62a17ae | 1175 | /* All OPEN option is parsed. Check capability when strict compare |
1176 | flag is enabled.*/ | |
1177 | if (CHECK_FLAG(peer->flags, PEER_FLAG_STRICT_CAP_MATCH)) { | |
1178 | /* If Unsupported Capability exists. */ | |
1179 | if (error != error_data) { | |
1180 | bgp_notify_send_with_data(peer, BGP_NOTIFY_OPEN_ERR, | |
1181 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1182 | error_data, | |
1183 | error - error_data); | |
1184 | return -1; | |
1185 | } | |
1186 | ||
1187 | /* Check local capability does not negotiated with remote | |
1188 | peer. */ | |
1189 | if (!strict_capability_same(peer)) { | |
1190 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1191 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1192 | return -1; | |
1193 | } | |
718e3744 | 1194 | } |
1195 | ||
d62a17ae | 1196 | /* Check there are no common AFI/SAFIs and send Unsupported Capability |
1197 | error. */ | |
1198 | if (*mp_capability | |
1199 | && !CHECK_FLAG(peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
1200 | if (!peer->afc_nego[AFI_IP][SAFI_UNICAST] | |
1201 | && !peer->afc_nego[AFI_IP][SAFI_MULTICAST] | |
1202 | && !peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST] | |
1203 | && !peer->afc_nego[AFI_IP][SAFI_MPLS_VPN] | |
1204 | && !peer->afc_nego[AFI_IP][SAFI_ENCAP] | |
7c40bf39 | 1205 | && !peer->afc_nego[AFI_IP][SAFI_FLOWSPEC] |
d62a17ae | 1206 | && !peer->afc_nego[AFI_IP6][SAFI_UNICAST] |
1207 | && !peer->afc_nego[AFI_IP6][SAFI_MULTICAST] | |
1208 | && !peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST] | |
1209 | && !peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN] | |
1210 | && !peer->afc_nego[AFI_IP6][SAFI_ENCAP] | |
7c40bf39 | 1211 | && !peer->afc_nego[AFI_IP6][SAFI_FLOWSPEC] |
d62a17ae | 1212 | && !peer->afc_nego[AFI_L2VPN][SAFI_EVPN]) { |
e50f7cfd | 1213 | flog_err(EC_BGP_PKT_OPEN, |
1c50c1c0 QY |
1214 | "%s [Error] Configured AFI/SAFIs do not " |
1215 | "overlap with received MP capabilities", | |
1216 | peer->host); | |
d62a17ae | 1217 | |
1218 | if (error != error_data) | |
1219 | bgp_notify_send_with_data( | |
1220 | peer, BGP_NOTIFY_OPEN_ERR, | |
1221 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, error_data, | |
1222 | error - error_data); | |
1223 | else | |
1224 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1225 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1226 | return -1; | |
1227 | } | |
718e3744 | 1228 | } |
d62a17ae | 1229 | return 0; |
718e3744 | 1230 | } |
1231 | ||
d62a17ae | 1232 | static void bgp_open_capability_orf(struct stream *s, struct peer *peer, |
d7c0a89a | 1233 | afi_t afi, safi_t safi, uint8_t code) |
718e3744 | 1234 | { |
d7c0a89a QY |
1235 | uint8_t cap_len; |
1236 | uint8_t orf_len; | |
d62a17ae | 1237 | unsigned long capp; |
1238 | unsigned long orfp; | |
1239 | unsigned long numberp; | |
1240 | int number_of_orfs = 0; | |
1241 | iana_afi_t pkt_afi; | |
5c525538 | 1242 | iana_safi_t pkt_safi; |
d62a17ae | 1243 | |
1244 | /* Convert AFI, SAFI to values for packet. */ | |
1245 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, &pkt_safi); | |
1246 | ||
1247 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1248 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1249 | stream_putc(s, 0); /* Capability Length */ | |
1250 | stream_putc(s, code); /* Capability Code */ | |
1251 | orfp = stream_get_endp(s); /* Set ORF Len Pointer */ | |
1252 | stream_putc(s, 0); /* ORF Length */ | |
1253 | stream_putw(s, pkt_afi); | |
1254 | stream_putc(s, 0); | |
1255 | stream_putc(s, pkt_safi); | |
1256 | numberp = stream_get_endp(s); /* Set Number Pointer */ | |
1257 | stream_putc(s, 0); /* Number of ORFs */ | |
1258 | ||
1259 | /* Address Prefix ORF */ | |
1260 | if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1261 | || CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) { | |
1262 | stream_putc(s, (code == CAPABILITY_CODE_ORF | |
1263 | ? ORF_TYPE_PREFIX | |
1264 | : ORF_TYPE_PREFIX_OLD)); | |
1265 | ||
1266 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1267 | PEER_FLAG_ORF_PREFIX_SM) | |
1268 | && CHECK_FLAG(peer->af_flags[afi][safi], | |
1269 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1270 | SET_FLAG(peer->af_cap[afi][safi], | |
1271 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1272 | SET_FLAG(peer->af_cap[afi][safi], | |
1273 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1274 | stream_putc(s, ORF_MODE_BOTH); | |
1275 | } else if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1276 | PEER_FLAG_ORF_PREFIX_SM)) { | |
1277 | SET_FLAG(peer->af_cap[afi][safi], | |
1278 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1279 | stream_putc(s, ORF_MODE_SEND); | |
1280 | } else { | |
1281 | SET_FLAG(peer->af_cap[afi][safi], | |
1282 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1283 | stream_putc(s, ORF_MODE_RECEIVE); | |
1284 | } | |
1285 | number_of_orfs++; | |
718e3744 | 1286 | } |
718e3744 | 1287 | |
d62a17ae | 1288 | /* Total Number of ORFs. */ |
1289 | stream_putc_at(s, numberp, number_of_orfs); | |
718e3744 | 1290 | |
d62a17ae | 1291 | /* Total ORF Len. */ |
1292 | orf_len = stream_get_endp(s) - orfp - 1; | |
1293 | stream_putc_at(s, orfp, orf_len); | |
718e3744 | 1294 | |
d62a17ae | 1295 | /* Total Capability Len. */ |
1296 | cap_len = stream_get_endp(s) - capp - 1; | |
1297 | stream_putc_at(s, capp, cap_len); | |
718e3744 | 1298 | } |
1299 | ||
034e185d | 1300 | static void bgp_peer_send_gr_capability(struct stream *s, struct peer *peer, |
36235319 | 1301 | unsigned long cp) |
034e185d | 1302 | { |
1303 | int len; | |
1304 | iana_afi_t pkt_afi; | |
1305 | afi_t afi; | |
1306 | safi_t safi; | |
1307 | iana_safi_t pkt_safi; | |
1308 | uint32_t restart_time; | |
1309 | unsigned long capp = 0; | |
1310 | unsigned long rcapp = 0; | |
1311 | ||
13909c4f DS |
1312 | if (!CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART) |
1313 | && !CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART_HELPER)) | |
1314 | return; | |
1315 | ||
1316 | if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) | |
1317 | zlog_debug("[BGP_GR] Sending helper Capability for Peer :%s :", | |
1318 | peer->host); | |
1319 | ||
1320 | SET_FLAG(peer->cap, PEER_CAP_RESTART_ADV); | |
1321 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1322 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1323 | stream_putc(s, 0); /* Capability Length */ | |
1324 | stream_putc(s, CAPABILITY_CODE_RESTART); | |
1325 | /* Set Restart Capability Len Pointer */ | |
1326 | rcapp = stream_get_endp(s); | |
1327 | stream_putc(s, 0); | |
1328 | restart_time = peer->bgp->restart_time; | |
1329 | if (peer->bgp->t_startup) { | |
1330 | SET_FLAG(restart_time, RESTART_R_BIT); | |
1331 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_ADV); | |
034e185d | 1332 | |
1333 | if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) | |
13909c4f DS |
1334 | zlog_debug("[BGP_GR] Sending R-Bit for Peer :%s :", |
1335 | peer->host); | |
1336 | } | |
1337 | ||
1338 | stream_putw(s, restart_time); | |
1339 | ||
1340 | /* Send address-family specific graceful-restart capability | |
1341 | * only when GR config is present | |
1342 | */ | |
1343 | if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART)) { | |
892fedb6 | 1344 | if (CHECK_FLAG(peer->bgp->flags, BGP_FLAG_GR_PRESERVE_FWD) |
13909c4f DS |
1345 | && BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) |
1346 | zlog_debug("[BGP_GR] F bit Set"); | |
1347 | ||
1348 | FOREACH_AFI_SAFI (afi, safi) { | |
1349 | if (!peer->afc[afi][safi]) | |
1350 | continue; | |
0f0444fb | 1351 | |
1352 | if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) | |
1353 | zlog_debug( | |
13909c4f DS |
1354 | "[BGP_GR] Sending GR Capability for AFI :%d :, SAFI :%d:", |
1355 | afi, safi); | |
034e185d | 1356 | |
13909c4f DS |
1357 | /* Convert AFI, SAFI to values for |
1358 | * packet. | |
1359 | */ | |
1360 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1361 | &pkt_safi); | |
1362 | stream_putw(s, pkt_afi); | |
1363 | stream_putc(s, pkt_safi); | |
892fedb6 DA |
1364 | if (CHECK_FLAG(peer->bgp->flags, |
1365 | BGP_FLAG_GR_PRESERVE_FWD)) | |
13909c4f DS |
1366 | stream_putc(s, RESTART_F_BIT); |
1367 | else | |
1368 | stream_putc(s, 0); | |
034e185d | 1369 | } |
034e185d | 1370 | } |
13909c4f DS |
1371 | |
1372 | /* Total Graceful restart capability Len. */ | |
1373 | len = stream_get_endp(s) - rcapp - 1; | |
1374 | stream_putc_at(s, rcapp, len); | |
1375 | ||
1376 | /* Total Capability Len. */ | |
1377 | len = stream_get_endp(s) - capp - 1; | |
1378 | stream_putc_at(s, capp, len); | |
034e185d | 1379 | } |
1380 | ||
718e3744 | 1381 | /* Fill in capability open option to the packet. */ |
d62a17ae | 1382 | void bgp_open_capability(struct stream *s, struct peer *peer) |
718e3744 | 1383 | { |
d7c0a89a | 1384 | uint8_t len; |
d62a17ae | 1385 | unsigned long cp, capp, rcapp; |
1386 | iana_afi_t pkt_afi; | |
1387 | afi_t afi; | |
5c525538 RW |
1388 | safi_t safi; |
1389 | iana_safi_t pkt_safi; | |
d62a17ae | 1390 | as_t local_as; |
d7c0a89a | 1391 | uint8_t afi_safi_count = 0; |
d62a17ae | 1392 | int adv_addpath_tx = 0; |
1393 | ||
1394 | /* Remember current pointer for Opt Parm Len. */ | |
1395 | cp = stream_get_endp(s); | |
1396 | ||
1397 | /* Opt Parm Len. */ | |
1398 | stream_putc(s, 0); | |
1399 | ||
1400 | /* Do not send capability. */ | |
1401 | if (!CHECK_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN) | |
1402 | || CHECK_FLAG(peer->flags, PEER_FLAG_DONT_CAPABILITY)) | |
1403 | return; | |
1404 | ||
1405 | /* MP capability for configured AFI, SAFI */ | |
05c7a1cc QY |
1406 | FOREACH_AFI_SAFI (afi, safi) { |
1407 | if (peer->afc[afi][safi]) { | |
1408 | /* Convert AFI, SAFI to values for packet. */ | |
1409 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1410 | &pkt_safi); | |
1411 | ||
1412 | peer->afc_adv[afi][safi] = 1; | |
1413 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1414 | stream_putc(s, CAPABILITY_CODE_MP_LEN + 2); | |
1415 | stream_putc(s, CAPABILITY_CODE_MP); | |
1416 | stream_putc(s, CAPABILITY_CODE_MP_LEN); | |
1417 | stream_putw(s, pkt_afi); | |
1418 | stream_putc(s, 0); | |
1419 | stream_putc(s, pkt_safi); | |
1420 | ||
1421 | /* Extended nexthop capability - currently | |
1422 | * supporting RFC-5549 for | |
1423 | * Link-Local peering only | |
1424 | */ | |
1425 | if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE) | |
1426 | && peer->su.sa.sa_family == AF_INET6 | |
05c7a1cc | 1427 | && afi == AFI_IP |
770df5fd | 1428 | && (safi == SAFI_UNICAST || safi == SAFI_MPLS_VPN |
05c7a1cc QY |
1429 | || safi == SAFI_LABELED_UNICAST)) { |
1430 | /* RFC 5549 Extended Next Hop Encoding | |
1431 | */ | |
1432 | SET_FLAG(peer->cap, PEER_CAP_ENHE_ADV); | |
d62a17ae | 1433 | stream_putc(s, BGP_OPEN_OPT_CAP); |
05c7a1cc QY |
1434 | stream_putc(s, CAPABILITY_CODE_ENHE_LEN + 2); |
1435 | stream_putc(s, CAPABILITY_CODE_ENHE); | |
1436 | stream_putc(s, CAPABILITY_CODE_ENHE_LEN); | |
1437 | ||
1438 | SET_FLAG(peer->af_cap[AFI_IP][safi], | |
1439 | PEER_CAP_ENHE_AF_ADV); | |
d62a17ae | 1440 | stream_putw(s, pkt_afi); |
05c7a1cc QY |
1441 | stream_putw(s, pkt_safi); |
1442 | stream_putw(s, afi_int2iana(AFI_IP6)); | |
d62a17ae | 1443 | |
05c7a1cc QY |
1444 | if (CHECK_FLAG(peer->af_cap[afi][safi], |
1445 | PEER_CAP_ENHE_AF_RCV)) | |
1446 | SET_FLAG(peer->af_cap[afi][safi], | |
1447 | PEER_CAP_ENHE_AF_NEGO); | |
d62a17ae | 1448 | } |
1449 | } | |
05c7a1cc | 1450 | } |
d62a17ae | 1451 | |
1452 | /* Route refresh. */ | |
1453 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_ADV); | |
1454 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1455 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1456 | stream_putc(s, CAPABILITY_CODE_REFRESH_OLD); | |
1457 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1458 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1459 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1460 | stream_putc(s, CAPABILITY_CODE_REFRESH); | |
1461 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1462 | ||
1463 | /* AS4 */ | |
1464 | SET_FLAG(peer->cap, PEER_CAP_AS4_ADV); | |
1465 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1466 | stream_putc(s, CAPABILITY_CODE_AS4_LEN + 2); | |
1467 | stream_putc(s, CAPABILITY_CODE_AS4); | |
1468 | stream_putc(s, CAPABILITY_CODE_AS4_LEN); | |
1469 | if (peer->change_local_as) | |
1470 | local_as = peer->change_local_as; | |
1471 | else | |
1472 | local_as = peer->local_as; | |
1473 | stream_putl(s, local_as); | |
1474 | ||
1475 | /* AddPath */ | |
05c7a1cc QY |
1476 | FOREACH_AFI_SAFI (afi, safi) { |
1477 | if (peer->afc[afi][safi]) { | |
1478 | afi_safi_count++; | |
1479 | ||
1480 | /* Only advertise addpath TX if a feature that | |
1481 | * will use it is | |
1482 | * configured */ | |
dcc68b5e | 1483 | if (peer->addpath_type[afi][safi] != BGP_ADDPATH_NONE) |
05c7a1cc QY |
1484 | adv_addpath_tx = 1; |
1485 | } | |
1486 | } | |
d62a17ae | 1487 | |
1488 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_ADV); | |
1489 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1490 | stream_putc(s, (CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count) + 2); | |
1491 | stream_putc(s, CAPABILITY_CODE_ADDPATH); | |
1492 | stream_putc(s, CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count); | |
1493 | ||
05c7a1cc QY |
1494 | FOREACH_AFI_SAFI (afi, safi) { |
1495 | if (peer->afc[afi][safi]) { | |
1496 | /* Convert AFI, SAFI to values for packet. */ | |
1497 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1498 | &pkt_safi); | |
d62a17ae | 1499 | |
05c7a1cc QY |
1500 | stream_putw(s, pkt_afi); |
1501 | stream_putc(s, pkt_safi); | |
d62a17ae | 1502 | |
05c7a1cc QY |
1503 | if (adv_addpath_tx) { |
1504 | stream_putc(s, BGP_ADDPATH_RX | BGP_ADDPATH_TX); | |
1505 | SET_FLAG(peer->af_cap[afi][safi], | |
1506 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1507 | SET_FLAG(peer->af_cap[afi][safi], | |
1508 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
1509 | } else { | |
1510 | stream_putc(s, BGP_ADDPATH_RX); | |
1511 | SET_FLAG(peer->af_cap[afi][safi], | |
1512 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1513 | UNSET_FLAG(peer->af_cap[afi][safi], | |
1514 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
d62a17ae | 1515 | } |
05c7a1cc QY |
1516 | } |
1517 | } | |
d62a17ae | 1518 | |
1519 | /* ORF capability. */ | |
05c7a1cc QY |
1520 | FOREACH_AFI_SAFI (afi, safi) { |
1521 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1522 | PEER_FLAG_ORF_PREFIX_SM) | |
1523 | || CHECK_FLAG(peer->af_flags[afi][safi], | |
1524 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1525 | bgp_open_capability_orf(s, peer, afi, safi, | |
1526 | CAPABILITY_CODE_ORF_OLD); | |
1527 | bgp_open_capability_orf(s, peer, afi, safi, | |
1528 | CAPABILITY_CODE_ORF); | |
1529 | } | |
1530 | } | |
d62a17ae | 1531 | |
1532 | /* Dynamic capability. */ | |
1533 | if (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY)) { | |
1534 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_ADV); | |
1535 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1536 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1537 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_OLD); | |
1538 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1539 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1540 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1541 | stream_putc(s, CAPABILITY_CODE_DYNAMIC); | |
1542 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
718e3744 | 1543 | } |
1544 | ||
d62a17ae | 1545 | /* Hostname capability */ |
6b3ee3a0 | 1546 | if (cmd_hostname_get()) { |
d62a17ae | 1547 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_ADV); |
1548 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1549 | rcapp = stream_get_endp(s); /* Ptr to length placeholder */ | |
1550 | stream_putc(s, 0); /* dummy len for now */ | |
1551 | stream_putc(s, CAPABILITY_CODE_FQDN); | |
1552 | capp = stream_get_endp(s); | |
1553 | stream_putc(s, 0); /* dummy len for now */ | |
6b3ee3a0 | 1554 | len = strlen(cmd_hostname_get()); |
d62a17ae | 1555 | if (len > BGP_MAX_HOSTNAME) |
1556 | len = BGP_MAX_HOSTNAME; | |
1557 | ||
1558 | stream_putc(s, len); | |
6b3ee3a0 MK |
1559 | stream_put(s, cmd_hostname_get(), len); |
1560 | if (cmd_domainname_get()) { | |
1561 | len = strlen(cmd_domainname_get()); | |
d62a17ae | 1562 | if (len > BGP_MAX_HOSTNAME) |
1563 | len = BGP_MAX_HOSTNAME; | |
1564 | ||
1565 | stream_putc(s, len); | |
6b3ee3a0 | 1566 | stream_put(s, cmd_domainname_get(), len); |
d62a17ae | 1567 | } else |
d62a17ae | 1568 | stream_putc(s, 0); /* 0 length */ |
04b6bdc0 | 1569 | |
d62a17ae | 1570 | /* Set the lengths straight */ |
1571 | len = stream_get_endp(s) - rcapp - 1; | |
1572 | stream_putc_at(s, rcapp, len); | |
1573 | len = stream_get_endp(s) - capp - 1; | |
1574 | stream_putc_at(s, capp, len); | |
04b6bdc0 | 1575 | |
d62a17ae | 1576 | if (bgp_debug_neighbor_events(peer)) |
d62a17ae | 1577 | zlog_debug( |
1578 | "%s Sending hostname cap with hn = %s, dn = %s", | |
6b3ee3a0 MK |
1579 | peer->host, cmd_hostname_get(), |
1580 | cmd_domainname_get()); | |
d62a17ae | 1581 | } |
1582 | ||
034e185d | 1583 | bgp_peer_send_gr_capability(s, peer, cp); |
d62a17ae | 1584 | |
1585 | /* Total Opt Parm Len. */ | |
1586 | len = stream_get_endp(s) - cp - 1; | |
1587 | stream_putc_at(s, cp, len); | |
718e3744 | 1588 | } |