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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( | |
3efd0893 | 335 | "%s Addr-family %d/%d not supported. Ignoring the ORF capability", |
d62a17ae | 336 | peer->host, pkt_afi, pkt_safi); |
337 | return 0; | |
718e3744 | 338 | } |
d62a17ae | 339 | |
340 | mpc.afi = pkt_afi; | |
341 | mpc.safi = safi; | |
342 | ||
343 | /* validate number field */ | |
344 | if (CAPABILITY_CODE_ORF_LEN + (num * 2) > hdr->length) { | |
345 | zlog_info( | |
3efd0893 | 346 | "%s ORF Capability entry length error, Cap length %u, num %u", |
d62a17ae | 347 | peer->host, hdr->length, num); |
348 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
349 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
350 | return -1; | |
718e3744 | 351 | } |
352 | ||
d62a17ae | 353 | for (i = 0; i < num; i++) { |
354 | type = stream_getc(s); | |
355 | mode = stream_getc(s); | |
356 | ||
357 | /* ORF Mode error check */ | |
358 | switch (mode) { | |
359 | case ORF_MODE_BOTH: | |
360 | case ORF_MODE_SEND: | |
361 | case ORF_MODE_RECEIVE: | |
362 | break; | |
363 | default: | |
364 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
365 | type, mode); | |
366 | continue; | |
367 | } | |
368 | /* ORF Type and afi/safi error checks */ | |
369 | /* capcode versus type */ | |
370 | switch (hdr->code) { | |
371 | case CAPABILITY_CODE_ORF: | |
372 | switch (type) { | |
373 | case ORF_TYPE_PREFIX: | |
374 | break; | |
375 | default: | |
376 | bgp_capability_orf_not_support( | |
377 | peer, pkt_afi, pkt_safi, type, mode); | |
378 | continue; | |
379 | } | |
380 | break; | |
381 | case CAPABILITY_CODE_ORF_OLD: | |
382 | switch (type) { | |
383 | case ORF_TYPE_PREFIX_OLD: | |
384 | break; | |
385 | default: | |
386 | bgp_capability_orf_not_support( | |
387 | peer, pkt_afi, pkt_safi, type, mode); | |
388 | continue; | |
389 | } | |
390 | break; | |
391 | default: | |
392 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
393 | type, mode); | |
394 | continue; | |
395 | } | |
396 | ||
397 | /* AFI vs SAFI */ | |
398 | if (!((afi == AFI_IP && safi == SAFI_UNICAST) | |
399 | || (afi == AFI_IP && safi == SAFI_MULTICAST) | |
400 | || (afi == AFI_IP6 && safi == SAFI_UNICAST))) { | |
401 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
402 | type, mode); | |
403 | continue; | |
404 | } | |
405 | ||
406 | if (bgp_debug_neighbor_events(peer)) | |
407 | zlog_debug( | |
3efd0893 | 408 | "%s OPEN has %s ORF capability as %s for afi/safi: %s/%s", |
d62a17ae | 409 | peer->host, |
410 | lookup_msg(orf_type_str, type, NULL), | |
748a041f DS |
411 | lookup_msg(orf_mode_str, mode, NULL), |
412 | iana_afi2str(pkt_afi), iana_safi2str(pkt_safi)); | |
d62a17ae | 413 | |
414 | if (hdr->code == CAPABILITY_CODE_ORF) { | |
415 | sm_cap = PEER_CAP_ORF_PREFIX_SM_RCV; | |
416 | rm_cap = PEER_CAP_ORF_PREFIX_RM_RCV; | |
417 | } else if (hdr->code == CAPABILITY_CODE_ORF_OLD) { | |
418 | sm_cap = PEER_CAP_ORF_PREFIX_SM_OLD_RCV; | |
419 | rm_cap = PEER_CAP_ORF_PREFIX_RM_OLD_RCV; | |
420 | } else { | |
421 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
422 | type, mode); | |
423 | continue; | |
424 | } | |
425 | ||
426 | switch (mode) { | |
427 | case ORF_MODE_BOTH: | |
428 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
429 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
430 | break; | |
431 | case ORF_MODE_SEND: | |
432 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
433 | break; | |
434 | case ORF_MODE_RECEIVE: | |
435 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
436 | break; | |
437 | } | |
718e3744 | 438 | } |
d62a17ae | 439 | return 0; |
718e3744 | 440 | } |
441 | ||
d62a17ae | 442 | static int bgp_capability_restart(struct peer *peer, |
443 | struct capability_header *caphdr) | |
6d58272b | 444 | { |
d62a17ae | 445 | struct stream *s = BGP_INPUT(peer); |
d7c0a89a | 446 | uint16_t restart_flag_time; |
d62a17ae | 447 | size_t end = stream_get_getp(s) + caphdr->length; |
448 | ||
449 | /* Verify length is a multiple of 4 */ | |
450 | if ((caphdr->length - 2) % 4) { | |
065eaa36 | 451 | flog_warn( |
e50f7cfd | 452 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 453 | "Restart Cap: Received invalid length %d, non-multiple of 4", |
454 | caphdr->length); | |
455 | return -1; | |
456 | } | |
457 | ||
458 | SET_FLAG(peer->cap, PEER_CAP_RESTART_RCV); | |
459 | restart_flag_time = stream_getw(s); | |
460 | if (CHECK_FLAG(restart_flag_time, RESTART_R_BIT)) | |
461 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV); | |
d7b3cda6 | 462 | else |
463 | UNSET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV); | |
d62a17ae | 464 | |
465 | UNSET_FLAG(restart_flag_time, 0xF000); | |
466 | peer->v_gr_restart = restart_flag_time; | |
467 | ||
468 | if (bgp_debug_neighbor_events(peer)) { | |
d62a17ae | 469 | zlog_debug("%s Peer has%srestarted. Restart Time : %d", |
470 | peer->host, | |
471 | CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV) | |
472 | ? " " | |
473 | : " not ", | |
474 | peer->v_gr_restart); | |
475 | } | |
476 | ||
477 | while (stream_get_getp(s) + 4 <= end) { | |
478 | afi_t afi; | |
479 | safi_t safi; | |
480 | iana_afi_t pkt_afi = stream_getw(s); | |
5c525538 | 481 | iana_safi_t pkt_safi = stream_getc(s); |
d7c0a89a | 482 | uint8_t flag = stream_getc(s); |
d62a17ae | 483 | |
484 | /* Convert AFI, SAFI to internal values, check. */ | |
485 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
486 | if (bgp_debug_neighbor_events(peer)) | |
487 | zlog_debug( | |
3efd0893 | 488 | "%s Addr-family %s/%s(afi/safi) not supported. Ignore the Graceful Restart capability for this AFI/SAFI", |
748a041f DS |
489 | peer->host, iana_afi2str(pkt_afi), |
490 | iana_safi2str(pkt_safi)); | |
d62a17ae | 491 | } else if (!peer->afc[afi][safi]) { |
492 | if (bgp_debug_neighbor_events(peer)) | |
493 | zlog_debug( | |
3efd0893 | 494 | "%s Addr-family %s/%s(afi/safi) not enabled. Ignore the Graceful Restart capability", |
748a041f DS |
495 | peer->host, iana_afi2str(pkt_afi), |
496 | iana_safi2str(pkt_safi)); | |
d62a17ae | 497 | } else { |
498 | if (bgp_debug_neighbor_events(peer)) | |
499 | zlog_debug( | |
500 | "%s Address family %s is%spreserved", | |
5cb5f4d0 | 501 | peer->host, get_afi_safi_str(afi, safi, false), |
d62a17ae | 502 | CHECK_FLAG( |
503 | peer->af_cap[afi][safi], | |
504 | PEER_CAP_RESTART_AF_PRESERVE_RCV) | |
505 | ? " " | |
506 | : " not "); | |
507 | ||
508 | SET_FLAG(peer->af_cap[afi][safi], | |
509 | PEER_CAP_RESTART_AF_RCV); | |
510 | if (CHECK_FLAG(flag, RESTART_F_BIT)) | |
511 | SET_FLAG(peer->af_cap[afi][safi], | |
512 | PEER_CAP_RESTART_AF_PRESERVE_RCV); | |
513 | } | |
514 | } | |
515 | return 0; | |
6d58272b | 516 | } |
718e3744 | 517 | |
14051b36 | 518 | /* Unlike other capability parsing routines, this one returns 0 on error */ |
d62a17ae | 519 | static as_t bgp_capability_as4(struct peer *peer, struct capability_header *hdr) |
0b2aa3a0 | 520 | { |
d62a17ae | 521 | SET_FLAG(peer->cap, PEER_CAP_AS4_RCV); |
522 | ||
523 | if (hdr->length != CAPABILITY_CODE_AS4_LEN) { | |
e50f7cfd | 524 | flog_err(EC_BGP_PKT_OPEN, |
1c50c1c0 QY |
525 | "%s AS4 capability has incorrect data length %d", |
526 | peer->host, hdr->length); | |
d62a17ae | 527 | return 0; |
528 | } | |
529 | ||
530 | as_t as4 = stream_getl(BGP_INPUT(peer)); | |
531 | ||
532 | if (BGP_DEBUG(as4, AS4)) | |
533 | zlog_debug( | |
534 | "%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u", | |
535 | peer->host, as4); | |
536 | return as4; | |
0b2aa3a0 PJ |
537 | } |
538 | ||
ef56aee4 DA |
539 | static int bgp_capability_ext_message(struct peer *peer, |
540 | struct capability_header *hdr) | |
541 | { | |
542 | if (hdr->length != CAPABILITY_CODE_EXT_MESSAGE_LEN) { | |
543 | flog_err( | |
544 | EC_BGP_PKT_OPEN, | |
545 | "%s: BGP Extended Message capability has incorrect data length %d", | |
546 | peer->host, hdr->length); | |
547 | return -1; | |
548 | } | |
549 | ||
550 | SET_FLAG(peer->cap, PEER_CAP_EXTENDED_MESSAGE_RCV); | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
d62a17ae | 555 | static int bgp_capability_addpath(struct peer *peer, |
556 | struct capability_header *hdr) | |
a82478b9 | 557 | { |
d62a17ae | 558 | struct stream *s = BGP_INPUT(peer); |
559 | size_t end = stream_get_getp(s) + hdr->length; | |
560 | ||
561 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_RCV); | |
562 | ||
563 | /* Verify length is a multiple of 4 */ | |
564 | if (hdr->length % 4) { | |
065eaa36 | 565 | flog_warn( |
e50f7cfd | 566 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 567 | "Add Path: Received invalid length %d, non-multiple of 4", |
568 | hdr->length); | |
569 | return -1; | |
570 | } | |
571 | ||
572 | while (stream_get_getp(s) + 4 <= end) { | |
573 | afi_t afi; | |
574 | safi_t safi; | |
575 | iana_afi_t pkt_afi = stream_getw(s); | |
5c525538 | 576 | iana_safi_t pkt_safi = stream_getc(s); |
d7c0a89a | 577 | uint8_t send_receive = stream_getc(s); |
d62a17ae | 578 | |
579 | if (bgp_debug_neighbor_events(peer)) | |
580 | zlog_debug( | |
748a041f DS |
581 | "%s OPEN has AddPath CAP for afi/safi: %s/%s%s%s", |
582 | peer->host, iana_afi2str(pkt_afi), | |
583 | iana_safi2str(pkt_safi), | |
d62a17ae | 584 | (send_receive & BGP_ADDPATH_RX) ? ", receive" |
585 | : "", | |
586 | (send_receive & BGP_ADDPATH_TX) ? ", transmit" | |
587 | : ""); | |
588 | ||
589 | /* Convert AFI, SAFI to internal values, check. */ | |
590 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
591 | if (bgp_debug_neighbor_events(peer)) | |
592 | zlog_debug( | |
3efd0893 | 593 | "%s Addr-family %s/%s(afi/safi) not supported. Ignore the Addpath Attribute for this AFI/SAFI", |
748a041f DS |
594 | peer->host, iana_afi2str(pkt_afi), |
595 | iana_safi2str(pkt_safi)); | |
d62a17ae | 596 | continue; |
597 | } else if (!peer->afc[afi][safi]) { | |
598 | if (bgp_debug_neighbor_events(peer)) | |
599 | zlog_debug( | |
3efd0893 | 600 | "%s Addr-family %s/%s(afi/safi) not enabled. Ignore the AddPath capability for this AFI/SAFI", |
748a041f DS |
601 | peer->host, iana_afi2str(pkt_afi), |
602 | iana_safi2str(pkt_safi)); | |
d62a17ae | 603 | continue; |
604 | } | |
605 | ||
606 | if (send_receive & BGP_ADDPATH_RX) | |
607 | SET_FLAG(peer->af_cap[afi][safi], | |
608 | PEER_CAP_ADDPATH_AF_RX_RCV); | |
609 | ||
610 | if (send_receive & BGP_ADDPATH_TX) | |
611 | SET_FLAG(peer->af_cap[afi][safi], | |
612 | PEER_CAP_ADDPATH_AF_TX_RCV); | |
613 | } | |
614 | ||
615 | return 0; | |
a82478b9 DS |
616 | } |
617 | ||
d62a17ae | 618 | static int bgp_capability_enhe(struct peer *peer, struct capability_header *hdr) |
8a92a8a0 | 619 | { |
d62a17ae | 620 | struct stream *s = BGP_INPUT(peer); |
621 | size_t end = stream_get_getp(s) + hdr->length; | |
622 | ||
623 | /* Verify length is a multiple of 4 */ | |
624 | if (hdr->length % 6) { | |
065eaa36 | 625 | flog_warn( |
e50f7cfd | 626 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 627 | "Extended NH: Received invalid length %d, non-multiple of 6", |
628 | hdr->length); | |
629 | return -1; | |
630 | } | |
631 | ||
632 | while (stream_get_getp(s) + 6 <= end) { | |
633 | iana_afi_t pkt_afi = stream_getw(s); | |
634 | afi_t afi; | |
5c525538 RW |
635 | iana_safi_t pkt_safi = stream_getw(s); |
636 | safi_t safi; | |
d62a17ae | 637 | iana_afi_t pkt_nh_afi = stream_getw(s); |
638 | afi_t nh_afi; | |
639 | ||
640 | if (bgp_debug_neighbor_events(peer)) | |
641 | zlog_debug( | |
748a041f DS |
642 | "%s Received with afi/safi/next-hop afi: %s/%s/%u", |
643 | peer->host, iana_afi2str(pkt_afi), | |
644 | iana_safi2str(pkt_safi), pkt_nh_afi); | |
d62a17ae | 645 | |
646 | /* Convert AFI, SAFI to internal values, check. */ | |
647 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
648 | if (bgp_debug_neighbor_events(peer)) | |
649 | zlog_debug( | |
3efd0893 | 650 | "%s Addr-family %s/%s(afi/safi) not supported. Ignore the ENHE Attribute for this AFI/SAFI", |
748a041f DS |
651 | peer->host, iana_afi2str(pkt_afi), |
652 | iana_safi2str(pkt_safi)); | |
d62a17ae | 653 | continue; |
654 | } | |
655 | ||
656 | /* RFC 5549 specifies use of this capability only for IPv4 AFI, | |
657 | * with | |
658 | * the Nexthop AFI being IPv6. A future spec may introduce other | |
659 | * possibilities, so we ignore other values with a log. Also, | |
660 | * only | |
661 | * SAFI_UNICAST and SAFI_LABELED_UNICAST are currently supported | |
662 | * (and expected). | |
663 | */ | |
664 | nh_afi = afi_iana2int(pkt_nh_afi); | |
665 | ||
666 | if (afi != AFI_IP || nh_afi != AFI_IP6 | |
770df5fd | 667 | || !(safi == SAFI_UNICAST || safi == SAFI_MPLS_VPN |
d62a17ae | 668 | || safi == SAFI_LABELED_UNICAST)) { |
065eaa36 | 669 | flog_warn( |
e50f7cfd | 670 | EC_BGP_CAPABILITY_INVALID_DATA, |
3efd0893 | 671 | "%s Unexpected afi/safi/next-hop afi: %s/%s/%u in Extended Next-hop capability, ignoring", |
748a041f DS |
672 | peer->host, iana_afi2str(pkt_afi), |
673 | iana_safi2str(pkt_safi), pkt_nh_afi); | |
d62a17ae | 674 | continue; |
675 | } | |
676 | ||
677 | SET_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV); | |
678 | ||
679 | if (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_ADV)) | |
680 | SET_FLAG(peer->af_cap[afi][safi], | |
681 | PEER_CAP_ENHE_AF_NEGO); | |
682 | } | |
683 | ||
684 | SET_FLAG(peer->cap, PEER_CAP_ENHE_RCV); | |
685 | ||
686 | return 0; | |
8a92a8a0 DS |
687 | } |
688 | ||
d62a17ae | 689 | static int bgp_capability_hostname(struct peer *peer, |
690 | struct capability_header *hdr) | |
04b6bdc0 | 691 | { |
d62a17ae | 692 | struct stream *s = BGP_INPUT(peer); |
693 | char str[BGP_MAX_HOSTNAME + 1]; | |
694 | size_t end = stream_get_getp(s) + hdr->length; | |
d7c0a89a | 695 | uint8_t len; |
d62a17ae | 696 | |
697 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_RCV); | |
698 | ||
699 | len = stream_getc(s); | |
700 | if (stream_get_getp(s) + len > end) { | |
065eaa36 | 701 | flog_warn( |
e50f7cfd | 702 | EC_BGP_CAPABILITY_INVALID_DATA, |
d62a17ae | 703 | "%s: Received malformed hostname capability from peer %s", |
15569c58 | 704 | __func__, peer->host); |
d62a17ae | 705 | return -1; |
706 | } | |
707 | ||
708 | if (len > BGP_MAX_HOSTNAME) { | |
709 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
710 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
711 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
712 | } else if (len) | |
713 | stream_get(str, s, len); | |
714 | ||
715 | if (len) { | |
716 | str[len] = '\0'; | |
717 | ||
e1b36e13 QY |
718 | XFREE(MTYPE_BGP_PEER_HOST, peer->hostname); |
719 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); | |
d62a17ae | 720 | |
721 | peer->hostname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); | |
722 | } | |
723 | ||
724 | if (stream_get_getp(s) + 1 > end) { | |
065eaa36 | 725 | flog_warn( |
e50f7cfd | 726 | EC_BGP_CAPABILITY_INVALID_DATA, |
d62a17ae | 727 | "%s: Received invalid domain name len (hostname capability) from peer %s", |
15569c58 | 728 | __func__, peer->host); |
d62a17ae | 729 | return -1; |
730 | } | |
731 | ||
732 | len = stream_getc(s); | |
733 | if (stream_get_getp(s) + len > end) { | |
065eaa36 | 734 | flog_warn( |
e50f7cfd | 735 | EC_BGP_CAPABILITY_INVALID_DATA, |
d62a17ae | 736 | "%s: Received runt domain name (hostname capability) from peer %s", |
15569c58 | 737 | __func__, peer->host); |
d62a17ae | 738 | return -1; |
739 | } | |
740 | ||
741 | if (len > BGP_MAX_HOSTNAME) { | |
742 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
743 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
744 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
745 | } else if (len) | |
746 | stream_get(str, s, len); | |
747 | ||
748 | if (len) { | |
749 | str[len] = '\0'; | |
aba5353c | 750 | |
e1b36e13 | 751 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); |
aba5353c | 752 | |
d62a17ae | 753 | peer->domainname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); |
754 | } | |
755 | ||
756 | if (bgp_debug_neighbor_events(peer)) { | |
757 | zlog_debug("%s received hostname %s, domainname %s", peer->host, | |
758 | peer->hostname, peer->domainname); | |
759 | } | |
760 | ||
761 | return 0; | |
04b6bdc0 DW |
762 | } |
763 | ||
d62a17ae | 764 | static const struct message capcode_str[] = { |
765 | {CAPABILITY_CODE_MP, "MultiProtocol Extensions"}, | |
766 | {CAPABILITY_CODE_REFRESH, "Route Refresh"}, | |
767 | {CAPABILITY_CODE_ORF, "Cooperative Route Filtering"}, | |
768 | {CAPABILITY_CODE_RESTART, "Graceful Restart"}, | |
769 | {CAPABILITY_CODE_AS4, "4-octet AS number"}, | |
770 | {CAPABILITY_CODE_ADDPATH, "AddPath"}, | |
771 | {CAPABILITY_CODE_DYNAMIC, "Dynamic"}, | |
772 | {CAPABILITY_CODE_ENHE, "Extended Next Hop Encoding"}, | |
773 | {CAPABILITY_CODE_DYNAMIC_OLD, "Dynamic (Old)"}, | |
774 | {CAPABILITY_CODE_REFRESH_OLD, "Route Refresh (Old)"}, | |
775 | {CAPABILITY_CODE_ORF_OLD, "ORF (Old)"}, | |
776 | {CAPABILITY_CODE_FQDN, "FQDN"}, | |
9af52ccf | 777 | {CAPABILITY_CODE_ENHANCED_RR, "Enhanced Route Refresh"}, |
ef56aee4 | 778 | {CAPABILITY_CODE_EXT_MESSAGE, "BGP Extended Message"}, |
d62a17ae | 779 | {0}}; |
6d58272b PJ |
780 | |
781 | /* Minimum sizes for length field of each cap (so not inc. the header) */ | |
d62a17ae | 782 | static const size_t cap_minsizes[] = { |
9d303b37 DL |
783 | [CAPABILITY_CODE_MP] = CAPABILITY_CODE_MP_LEN, |
784 | [CAPABILITY_CODE_REFRESH] = CAPABILITY_CODE_REFRESH_LEN, | |
785 | [CAPABILITY_CODE_ORF] = CAPABILITY_CODE_ORF_LEN, | |
786 | [CAPABILITY_CODE_RESTART] = CAPABILITY_CODE_RESTART_LEN, | |
787 | [CAPABILITY_CODE_AS4] = CAPABILITY_CODE_AS4_LEN, | |
788 | [CAPABILITY_CODE_ADDPATH] = CAPABILITY_CODE_ADDPATH_LEN, | |
789 | [CAPABILITY_CODE_DYNAMIC] = CAPABILITY_CODE_DYNAMIC_LEN, | |
790 | [CAPABILITY_CODE_DYNAMIC_OLD] = CAPABILITY_CODE_DYNAMIC_LEN, | |
791 | [CAPABILITY_CODE_ENHE] = CAPABILITY_CODE_ENHE_LEN, | |
792 | [CAPABILITY_CODE_REFRESH_OLD] = CAPABILITY_CODE_REFRESH_LEN, | |
793 | [CAPABILITY_CODE_ORF_OLD] = CAPABILITY_CODE_ORF_LEN, | |
794 | [CAPABILITY_CODE_FQDN] = CAPABILITY_CODE_MIN_FQDN_LEN, | |
9af52ccf | 795 | [CAPABILITY_CODE_ENHANCED_RR] = CAPABILITY_CODE_ENHANCED_LEN, |
ef56aee4 | 796 | [CAPABILITY_CODE_EXT_MESSAGE] = CAPABILITY_CODE_EXT_MESSAGE_LEN, |
6d58272b PJ |
797 | }; |
798 | ||
695ef95f PJ |
799 | /* value the capability must be a multiple of. |
800 | * 0-data capabilities won't be checked against this. | |
801 | * Other capabilities whose data doesn't fall on convenient boundaries for this | |
802 | * table should be set to 1. | |
803 | */ | |
d62a17ae | 804 | static const size_t cap_modsizes[] = { |
9d303b37 DL |
805 | [CAPABILITY_CODE_MP] = 4, |
806 | [CAPABILITY_CODE_REFRESH] = 1, | |
807 | [CAPABILITY_CODE_ORF] = 1, | |
808 | [CAPABILITY_CODE_RESTART] = 1, | |
809 | [CAPABILITY_CODE_AS4] = 4, | |
810 | [CAPABILITY_CODE_ADDPATH] = 4, | |
811 | [CAPABILITY_CODE_DYNAMIC] = 1, | |
812 | [CAPABILITY_CODE_DYNAMIC_OLD] = 1, | |
813 | [CAPABILITY_CODE_ENHE] = 6, | |
814 | [CAPABILITY_CODE_REFRESH_OLD] = 1, | |
815 | [CAPABILITY_CODE_ORF_OLD] = 1, | |
816 | [CAPABILITY_CODE_FQDN] = 1, | |
9af52ccf | 817 | [CAPABILITY_CODE_ENHANCED_RR] = 1, |
ef56aee4 | 818 | [CAPABILITY_CODE_EXT_MESSAGE] = 1, |
695ef95f PJ |
819 | }; |
820 | ||
3b381c32 AS |
821 | /** |
822 | * Parse given capability. | |
6d58272b | 823 | * XXX: This is reading into a stream, but not using stream API |
3b381c32 AS |
824 | * |
825 | * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol | |
826 | * capabilities were encountered. | |
6d58272b | 827 | */ |
d62a17ae | 828 | static int bgp_capability_parse(struct peer *peer, size_t length, |
d7c0a89a | 829 | int *mp_capability, uint8_t **error) |
6d58272b | 830 | { |
d62a17ae | 831 | int ret; |
832 | struct stream *s = BGP_INPUT(peer); | |
833 | size_t end = stream_get_getp(s) + length; | |
34aa7448 | 834 | uint16_t restart_flag_time = 0; |
d62a17ae | 835 | |
836 | assert(STREAM_READABLE(s) >= length); | |
837 | ||
838 | while (stream_get_getp(s) < end) { | |
839 | size_t start; | |
d7c0a89a | 840 | uint8_t *sp = stream_pnt(s); |
d62a17ae | 841 | struct capability_header caphdr; |
842 | ||
843 | ret = 0; | |
844 | /* We need at least capability code and capability length. */ | |
845 | if (stream_get_getp(s) + 2 > end) { | |
846 | zlog_info("%s Capability length error (< header)", | |
847 | peer->host); | |
848 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
849 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
850 | return -1; | |
851 | } | |
852 | ||
853 | caphdr.code = stream_getc(s); | |
854 | caphdr.length = stream_getc(s); | |
855 | start = stream_get_getp(s); | |
856 | ||
857 | /* Capability length check sanity check. */ | |
858 | if (start + caphdr.length > end) { | |
859 | zlog_info("%s Capability length error (< length)", | |
860 | peer->host); | |
861 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
862 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
863 | return -1; | |
864 | } | |
865 | ||
866 | if (bgp_debug_neighbor_events(peer)) | |
867 | zlog_debug("%s OPEN has %s capability (%u), length %u", | |
868 | peer->host, | |
869 | lookup_msg(capcode_str, caphdr.code, NULL), | |
870 | caphdr.code, caphdr.length); | |
871 | ||
872 | /* Length sanity check, type-specific, for known capabilities */ | |
873 | switch (caphdr.code) { | |
874 | case CAPABILITY_CODE_MP: | |
875 | case CAPABILITY_CODE_REFRESH: | |
876 | case CAPABILITY_CODE_REFRESH_OLD: | |
877 | case CAPABILITY_CODE_ORF: | |
878 | case CAPABILITY_CODE_ORF_OLD: | |
879 | case CAPABILITY_CODE_RESTART: | |
880 | case CAPABILITY_CODE_AS4: | |
881 | case CAPABILITY_CODE_ADDPATH: | |
882 | case CAPABILITY_CODE_DYNAMIC: | |
883 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
884 | case CAPABILITY_CODE_ENHE: | |
885 | case CAPABILITY_CODE_FQDN: | |
9af52ccf | 886 | case CAPABILITY_CODE_ENHANCED_RR: |
ef56aee4 | 887 | case CAPABILITY_CODE_EXT_MESSAGE: |
d62a17ae | 888 | /* Check length. */ |
889 | if (caphdr.length < cap_minsizes[caphdr.code]) { | |
890 | zlog_info( | |
3efd0893 | 891 | "%s %s Capability length error: got %u, expected at least %u", |
d62a17ae | 892 | peer->host, |
893 | lookup_msg(capcode_str, caphdr.code, | |
894 | NULL), | |
895 | caphdr.length, | |
896 | (unsigned)cap_minsizes[caphdr.code]); | |
897 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
898 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
899 | return -1; | |
900 | } | |
901 | if (caphdr.length | |
902 | && caphdr.length % cap_modsizes[caphdr.code] != 0) { | |
903 | zlog_info( | |
3efd0893 | 904 | "%s %s Capability length error: got %u, expected a multiple of %u", |
d62a17ae | 905 | peer->host, |
906 | lookup_msg(capcode_str, caphdr.code, | |
907 | NULL), | |
908 | caphdr.length, | |
909 | (unsigned)cap_modsizes[caphdr.code]); | |
910 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
911 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
912 | return -1; | |
913 | } | |
914 | /* we deliberately ignore unknown codes, see below */ | |
915 | default: | |
916 | break; | |
917 | } | |
918 | ||
919 | switch (caphdr.code) { | |
920 | case CAPABILITY_CODE_MP: { | |
921 | *mp_capability = 1; | |
922 | ||
923 | /* Ignore capability when override-capability is set. */ | |
924 | if (!CHECK_FLAG(peer->flags, | |
925 | PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
926 | /* Set negotiated value. */ | |
927 | ret = bgp_capability_mp(peer, &caphdr); | |
928 | ||
929 | /* Unsupported Capability. */ | |
930 | if (ret < 0) { | |
931 | /* Store return data. */ | |
932 | memcpy(*error, sp, caphdr.length + 2); | |
933 | *error += caphdr.length + 2; | |
934 | } | |
935 | ret = 0; /* Don't return error for this */ | |
936 | } | |
937 | } break; | |
9af52ccf | 938 | case CAPABILITY_CODE_ENHANCED_RR: |
d62a17ae | 939 | case CAPABILITY_CODE_REFRESH: |
940 | case CAPABILITY_CODE_REFRESH_OLD: { | |
941 | /* BGP refresh capability */ | |
9af52ccf DA |
942 | if (caphdr.code == CAPABILITY_CODE_ENHANCED_RR) |
943 | SET_FLAG(peer->cap, PEER_CAP_ENHANCED_RR_RCV); | |
944 | else if (caphdr.code == CAPABILITY_CODE_REFRESH_OLD) | |
d62a17ae | 945 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV); |
946 | else | |
947 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV); | |
948 | } break; | |
949 | case CAPABILITY_CODE_ORF: | |
950 | case CAPABILITY_CODE_ORF_OLD: | |
951 | ret = bgp_capability_orf_entry(peer, &caphdr); | |
952 | break; | |
953 | case CAPABILITY_CODE_RESTART: | |
954 | ret = bgp_capability_restart(peer, &caphdr); | |
955 | break; | |
956 | case CAPABILITY_CODE_DYNAMIC: | |
957 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
958 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV); | |
959 | break; | |
960 | case CAPABILITY_CODE_AS4: | |
961 | /* Already handled as a special-case parsing of the | |
962 | * capabilities | |
963 | * at the beginning of OPEN processing. So we care not a | |
964 | * jot | |
965 | * for the value really, only error case. | |
966 | */ | |
967 | if (!bgp_capability_as4(peer, &caphdr)) | |
968 | ret = -1; | |
969 | break; | |
970 | case CAPABILITY_CODE_ADDPATH: | |
971 | ret = bgp_capability_addpath(peer, &caphdr); | |
972 | break; | |
973 | case CAPABILITY_CODE_ENHE: | |
974 | ret = bgp_capability_enhe(peer, &caphdr); | |
975 | break; | |
ef56aee4 DA |
976 | case CAPABILITY_CODE_EXT_MESSAGE: |
977 | ret = bgp_capability_ext_message(peer, &caphdr); | |
978 | break; | |
d62a17ae | 979 | case CAPABILITY_CODE_FQDN: |
980 | ret = bgp_capability_hostname(peer, &caphdr); | |
981 | break; | |
982 | default: | |
983 | if (caphdr.code > 128) { | |
984 | /* We don't send Notification for unknown vendor | |
985 | specific | |
986 | capabilities. It seems reasonable for now... | |
987 | */ | |
e50f7cfd | 988 | flog_warn(EC_BGP_CAPABILITY_VENDOR, |
065eaa36 | 989 | "%s Vendor specific capability %d", |
d62a17ae | 990 | peer->host, caphdr.code); |
991 | } else { | |
065eaa36 | 992 | flog_warn( |
e50f7cfd | 993 | EC_BGP_CAPABILITY_UNKNOWN, |
d62a17ae | 994 | "%s unrecognized capability code: %d - ignored", |
995 | peer->host, caphdr.code); | |
996 | memcpy(*error, sp, caphdr.length + 2); | |
997 | *error += caphdr.length + 2; | |
998 | } | |
999 | } | |
1000 | ||
1001 | if (ret < 0) { | |
1002 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1003 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1004 | return -1; | |
1005 | } | |
1006 | if (stream_get_getp(s) != (start + caphdr.length)) { | |
1007 | if (stream_get_getp(s) > (start + caphdr.length)) | |
065eaa36 | 1008 | flog_warn( |
e50f7cfd | 1009 | EC_BGP_CAPABILITY_INVALID_LENGTH, |
d62a17ae | 1010 | "%s Cap-parser for %s read past cap-length, %u!", |
1011 | peer->host, | |
1012 | lookup_msg(capcode_str, caphdr.code, | |
1013 | NULL), | |
1014 | caphdr.length); | |
1015 | stream_set_getp(s, start + caphdr.length); | |
1016 | } | |
34aa7448 | 1017 | |
1018 | if (!CHECK_FLAG(peer->cap, PEER_CAP_RESTART_RCV)) { | |
1019 | UNSET_FLAG(restart_flag_time, 0xF000); | |
1020 | peer->v_gr_restart = restart_flag_time; | |
1021 | } | |
718e3744 | 1022 | } |
d62a17ae | 1023 | return 0; |
718e3744 | 1024 | } |
1025 | ||
d62a17ae | 1026 | static int bgp_auth_parse(struct peer *peer, size_t length) |
718e3744 | 1027 | { |
d62a17ae | 1028 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, |
1029 | BGP_NOTIFY_OPEN_AUTH_FAILURE); | |
1030 | return -1; | |
718e3744 | 1031 | } |
1032 | ||
3dc339cd | 1033 | static bool strict_capability_same(struct peer *peer) |
718e3744 | 1034 | { |
d62a17ae | 1035 | int i, j; |
718e3744 | 1036 | |
d62a17ae | 1037 | for (i = AFI_IP; i < AFI_MAX; i++) |
1038 | for (j = SAFI_UNICAST; j < SAFI_MAX; j++) | |
1039 | if (peer->afc[i][j] != peer->afc_nego[i][j]) | |
3dc339cd DA |
1040 | return false; |
1041 | return true; | |
718e3744 | 1042 | } |
1043 | ||
0b2aa3a0 PJ |
1044 | /* peek into option, stores ASN to *as4 if the AS4 capability was found. |
1045 | * Returns 0 if no as4 found, as4cap value otherwise. | |
1046 | */ | |
d7c0a89a | 1047 | as_t peek_for_as4_capability(struct peer *peer, uint8_t length) |
0b2aa3a0 | 1048 | { |
d62a17ae | 1049 | struct stream *s = BGP_INPUT(peer); |
1050 | size_t orig_getp = stream_get_getp(s); | |
1051 | size_t end = orig_getp + length; | |
1052 | as_t as4 = 0; | |
1053 | ||
1054 | if (BGP_DEBUG(as4, AS4)) | |
4cb5e18b | 1055 | zlog_debug( |
3efd0893 | 1056 | "%s [AS4] rcv OPEN w/ OPTION parameter len: %u, peeking for as4", |
d62a17ae | 1057 | peer->host, length); |
1058 | /* the error cases we DONT handle, we ONLY try to read as4 out of | |
1059 | * correctly formatted options. | |
1060 | */ | |
1061 | while (stream_get_getp(s) < end) { | |
d7c0a89a QY |
1062 | uint8_t opt_type; |
1063 | uint8_t opt_length; | |
d62a17ae | 1064 | |
1065 | /* Check the length. */ | |
1066 | if (stream_get_getp(s) + 2 > end) | |
1067 | goto end; | |
1068 | ||
1069 | /* Fetch option type and length. */ | |
1070 | opt_type = stream_getc(s); | |
1071 | opt_length = stream_getc(s); | |
1072 | ||
1073 | /* Option length check. */ | |
1074 | if (stream_get_getp(s) + opt_length > end) | |
1075 | goto end; | |
1076 | ||
1077 | if (opt_type == BGP_OPEN_OPT_CAP) { | |
1078 | unsigned long capd_start = stream_get_getp(s); | |
1079 | unsigned long capd_end = capd_start + opt_length; | |
1080 | ||
1081 | assert(capd_end <= end); | |
1082 | ||
1083 | while (stream_get_getp(s) < capd_end) { | |
1084 | struct capability_header hdr; | |
1085 | ||
1086 | if (stream_get_getp(s) + 2 > capd_end) | |
1087 | goto end; | |
1088 | ||
1089 | hdr.code = stream_getc(s); | |
1090 | hdr.length = stream_getc(s); | |
1091 | ||
1092 | if ((stream_get_getp(s) + hdr.length) | |
1093 | > capd_end) | |
1094 | goto end; | |
1095 | ||
1096 | if (hdr.code == CAPABILITY_CODE_AS4) { | |
1097 | if (BGP_DEBUG(as4, AS4)) | |
4cb5e18b | 1098 | zlog_debug( |
d62a17ae | 1099 | "[AS4] found AS4 capability, about to parse"); |
1100 | as4 = bgp_capability_as4(peer, &hdr); | |
1101 | ||
1102 | goto end; | |
1103 | } | |
1104 | stream_forward_getp(s, hdr.length); | |
1105 | } | |
1106 | } | |
0b2aa3a0 | 1107 | } |
0b2aa3a0 PJ |
1108 | |
1109 | end: | |
d62a17ae | 1110 | stream_set_getp(s, orig_getp); |
1111 | return as4; | |
0b2aa3a0 PJ |
1112 | } |
1113 | ||
3b381c32 AS |
1114 | /** |
1115 | * Parse open option. | |
1116 | * | |
1117 | * @param[out] mp_capability @see bgp_capability_parse() for semantics. | |
1118 | */ | |
d7c0a89a | 1119 | int bgp_open_option_parse(struct peer *peer, uint8_t length, int *mp_capability) |
718e3744 | 1120 | { |
d62a17ae | 1121 | int ret = 0; |
d7c0a89a | 1122 | uint8_t *error; |
556beacf | 1123 | uint8_t error_data[BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE]; |
d62a17ae | 1124 | struct stream *s = BGP_INPUT(peer); |
1125 | size_t end = stream_get_getp(s) + length; | |
1126 | ||
1127 | error = error_data; | |
1128 | ||
1129 | if (bgp_debug_neighbor_events(peer)) | |
1130 | zlog_debug("%s rcv OPEN w/ OPTION parameter len: %u", | |
1131 | peer->host, length); | |
1132 | ||
77b34214 NT |
1133 | /* Unset any previously received GR capability. */ |
1134 | UNSET_FLAG(peer->cap, PEER_CAP_RESTART_RCV); | |
1135 | ||
d62a17ae | 1136 | while (stream_get_getp(s) < end) { |
d7c0a89a QY |
1137 | uint8_t opt_type; |
1138 | uint8_t opt_length; | |
d62a17ae | 1139 | |
1140 | /* Must have at least an OPEN option header */ | |
1141 | if (STREAM_READABLE(s) < 2) { | |
1142 | zlog_info("%s Option length error", peer->host); | |
1143 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1144 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1145 | return -1; | |
1146 | } | |
1147 | ||
1148 | /* Fetch option type and length. */ | |
1149 | opt_type = stream_getc(s); | |
1150 | opt_length = stream_getc(s); | |
1151 | ||
1152 | /* Option length check. */ | |
1153 | if (STREAM_READABLE(s) < opt_length) { | |
1154 | zlog_info("%s Option length error", peer->host); | |
1155 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1156 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1157 | return -1; | |
1158 | } | |
1159 | ||
1160 | if (bgp_debug_neighbor_events(peer)) | |
1161 | zlog_debug( | |
1162 | "%s rcvd OPEN w/ optional parameter type %u (%s) len %u", | |
1163 | peer->host, opt_type, | |
1164 | opt_type == BGP_OPEN_OPT_AUTH | |
1165 | ? "Authentication" | |
1166 | : opt_type == BGP_OPEN_OPT_CAP | |
1167 | ? "Capability" | |
1168 | : "Unknown", | |
1169 | opt_length); | |
1170 | ||
1171 | switch (opt_type) { | |
1172 | case BGP_OPEN_OPT_AUTH: | |
1173 | ret = bgp_auth_parse(peer, opt_length); | |
1174 | break; | |
1175 | case BGP_OPEN_OPT_CAP: | |
1176 | ret = bgp_capability_parse(peer, opt_length, | |
1177 | mp_capability, &error); | |
1178 | break; | |
1179 | default: | |
1180 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1181 | BGP_NOTIFY_OPEN_UNSUP_PARAM); | |
1182 | ret = -1; | |
1183 | break; | |
1184 | } | |
1185 | ||
1186 | /* Parse error. To accumulate all unsupported capability codes, | |
1187 | bgp_capability_parse does not return -1 when encounter | |
1188 | unsupported capability code. To detect that, please check | |
1189 | error and erro_data pointer, like below. */ | |
1190 | if (ret < 0) | |
1191 | return -1; | |
718e3744 | 1192 | } |
1193 | ||
d62a17ae | 1194 | /* All OPEN option is parsed. Check capability when strict compare |
1195 | flag is enabled.*/ | |
1196 | if (CHECK_FLAG(peer->flags, PEER_FLAG_STRICT_CAP_MATCH)) { | |
1197 | /* If Unsupported Capability exists. */ | |
1198 | if (error != error_data) { | |
1199 | bgp_notify_send_with_data(peer, BGP_NOTIFY_OPEN_ERR, | |
1200 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1201 | error_data, | |
1202 | error - error_data); | |
1203 | return -1; | |
1204 | } | |
1205 | ||
1206 | /* Check local capability does not negotiated with remote | |
1207 | peer. */ | |
1208 | if (!strict_capability_same(peer)) { | |
1209 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1210 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1211 | return -1; | |
1212 | } | |
718e3744 | 1213 | } |
1214 | ||
ef56aee4 DA |
1215 | /* Extended Message Support */ |
1216 | peer->max_packet_size = | |
8d976b0e DA |
1217 | (CHECK_FLAG(peer->cap, PEER_CAP_EXTENDED_MESSAGE_RCV) |
1218 | && CHECK_FLAG(peer->cap, PEER_CAP_EXTENDED_MESSAGE_ADV)) | |
556beacf QY |
1219 | ? BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE |
1220 | : BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE; | |
ef56aee4 | 1221 | |
d62a17ae | 1222 | /* Check there are no common AFI/SAFIs and send Unsupported Capability |
1223 | error. */ | |
1224 | if (*mp_capability | |
1225 | && !CHECK_FLAG(peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
1226 | if (!peer->afc_nego[AFI_IP][SAFI_UNICAST] | |
1227 | && !peer->afc_nego[AFI_IP][SAFI_MULTICAST] | |
1228 | && !peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST] | |
1229 | && !peer->afc_nego[AFI_IP][SAFI_MPLS_VPN] | |
1230 | && !peer->afc_nego[AFI_IP][SAFI_ENCAP] | |
7c40bf39 | 1231 | && !peer->afc_nego[AFI_IP][SAFI_FLOWSPEC] |
d62a17ae | 1232 | && !peer->afc_nego[AFI_IP6][SAFI_UNICAST] |
1233 | && !peer->afc_nego[AFI_IP6][SAFI_MULTICAST] | |
1234 | && !peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST] | |
1235 | && !peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN] | |
1236 | && !peer->afc_nego[AFI_IP6][SAFI_ENCAP] | |
7c40bf39 | 1237 | && !peer->afc_nego[AFI_IP6][SAFI_FLOWSPEC] |
d62a17ae | 1238 | && !peer->afc_nego[AFI_L2VPN][SAFI_EVPN]) { |
e50f7cfd | 1239 | flog_err(EC_BGP_PKT_OPEN, |
3efd0893 | 1240 | "%s [Error] Configured AFI/SAFIs do not overlap with received MP capabilities", |
1c50c1c0 | 1241 | peer->host); |
d62a17ae | 1242 | |
1243 | if (error != error_data) | |
1244 | bgp_notify_send_with_data( | |
1245 | peer, BGP_NOTIFY_OPEN_ERR, | |
1246 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, error_data, | |
1247 | error - error_data); | |
1248 | else | |
1249 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1250 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1251 | return -1; | |
1252 | } | |
718e3744 | 1253 | } |
d62a17ae | 1254 | return 0; |
718e3744 | 1255 | } |
1256 | ||
d62a17ae | 1257 | static void bgp_open_capability_orf(struct stream *s, struct peer *peer, |
d7c0a89a | 1258 | afi_t afi, safi_t safi, uint8_t code) |
718e3744 | 1259 | { |
d7c0a89a QY |
1260 | uint8_t cap_len; |
1261 | uint8_t orf_len; | |
d62a17ae | 1262 | unsigned long capp; |
1263 | unsigned long orfp; | |
1264 | unsigned long numberp; | |
1265 | int number_of_orfs = 0; | |
1266 | iana_afi_t pkt_afi; | |
5c525538 | 1267 | iana_safi_t pkt_safi; |
d62a17ae | 1268 | |
1269 | /* Convert AFI, SAFI to values for packet. */ | |
1270 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, &pkt_safi); | |
1271 | ||
1272 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1273 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1274 | stream_putc(s, 0); /* Capability Length */ | |
1275 | stream_putc(s, code); /* Capability Code */ | |
1276 | orfp = stream_get_endp(s); /* Set ORF Len Pointer */ | |
1277 | stream_putc(s, 0); /* ORF Length */ | |
1278 | stream_putw(s, pkt_afi); | |
1279 | stream_putc(s, 0); | |
1280 | stream_putc(s, pkt_safi); | |
1281 | numberp = stream_get_endp(s); /* Set Number Pointer */ | |
1282 | stream_putc(s, 0); /* Number of ORFs */ | |
1283 | ||
1284 | /* Address Prefix ORF */ | |
1285 | if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1286 | || CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) { | |
1287 | stream_putc(s, (code == CAPABILITY_CODE_ORF | |
1288 | ? ORF_TYPE_PREFIX | |
1289 | : ORF_TYPE_PREFIX_OLD)); | |
1290 | ||
1291 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1292 | PEER_FLAG_ORF_PREFIX_SM) | |
1293 | && CHECK_FLAG(peer->af_flags[afi][safi], | |
1294 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1295 | SET_FLAG(peer->af_cap[afi][safi], | |
1296 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1297 | SET_FLAG(peer->af_cap[afi][safi], | |
1298 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1299 | stream_putc(s, ORF_MODE_BOTH); | |
1300 | } else if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1301 | PEER_FLAG_ORF_PREFIX_SM)) { | |
1302 | SET_FLAG(peer->af_cap[afi][safi], | |
1303 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1304 | stream_putc(s, ORF_MODE_SEND); | |
1305 | } else { | |
1306 | SET_FLAG(peer->af_cap[afi][safi], | |
1307 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1308 | stream_putc(s, ORF_MODE_RECEIVE); | |
1309 | } | |
1310 | number_of_orfs++; | |
718e3744 | 1311 | } |
718e3744 | 1312 | |
d62a17ae | 1313 | /* Total Number of ORFs. */ |
1314 | stream_putc_at(s, numberp, number_of_orfs); | |
718e3744 | 1315 | |
d62a17ae | 1316 | /* Total ORF Len. */ |
1317 | orf_len = stream_get_endp(s) - orfp - 1; | |
1318 | stream_putc_at(s, orfp, orf_len); | |
718e3744 | 1319 | |
d62a17ae | 1320 | /* Total Capability Len. */ |
1321 | cap_len = stream_get_endp(s) - capp - 1; | |
1322 | stream_putc_at(s, capp, cap_len); | |
718e3744 | 1323 | } |
1324 | ||
034e185d | 1325 | static void bgp_peer_send_gr_capability(struct stream *s, struct peer *peer, |
36235319 | 1326 | unsigned long cp) |
034e185d | 1327 | { |
1328 | int len; | |
1329 | iana_afi_t pkt_afi; | |
1330 | afi_t afi; | |
1331 | safi_t safi; | |
1332 | iana_safi_t pkt_safi; | |
1333 | uint32_t restart_time; | |
1334 | unsigned long capp = 0; | |
1335 | unsigned long rcapp = 0; | |
1336 | ||
13909c4f DS |
1337 | if (!CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART) |
1338 | && !CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART_HELPER)) | |
1339 | return; | |
1340 | ||
1341 | if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) | |
1342 | zlog_debug("[BGP_GR] Sending helper Capability for Peer :%s :", | |
1343 | peer->host); | |
1344 | ||
1345 | SET_FLAG(peer->cap, PEER_CAP_RESTART_ADV); | |
1346 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1347 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1348 | stream_putc(s, 0); /* Capability Length */ | |
1349 | stream_putc(s, CAPABILITY_CODE_RESTART); | |
1350 | /* Set Restart Capability Len Pointer */ | |
1351 | rcapp = stream_get_endp(s); | |
1352 | stream_putc(s, 0); | |
1353 | restart_time = peer->bgp->restart_time; | |
1354 | if (peer->bgp->t_startup) { | |
1355 | SET_FLAG(restart_time, RESTART_R_BIT); | |
1356 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_ADV); | |
034e185d | 1357 | |
1358 | if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) | |
13909c4f DS |
1359 | zlog_debug("[BGP_GR] Sending R-Bit for Peer :%s :", |
1360 | peer->host); | |
1361 | } | |
1362 | ||
1363 | stream_putw(s, restart_time); | |
1364 | ||
1365 | /* Send address-family specific graceful-restart capability | |
1366 | * only when GR config is present | |
1367 | */ | |
1368 | if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART)) { | |
892fedb6 | 1369 | if (CHECK_FLAG(peer->bgp->flags, BGP_FLAG_GR_PRESERVE_FWD) |
13909c4f DS |
1370 | && BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) |
1371 | zlog_debug("[BGP_GR] F bit Set"); | |
1372 | ||
1373 | FOREACH_AFI_SAFI (afi, safi) { | |
1374 | if (!peer->afc[afi][safi]) | |
1375 | continue; | |
0f0444fb | 1376 | |
1377 | if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART)) | |
1378 | zlog_debug( | |
13909c4f DS |
1379 | "[BGP_GR] Sending GR Capability for AFI :%d :, SAFI :%d:", |
1380 | afi, safi); | |
034e185d | 1381 | |
13909c4f DS |
1382 | /* Convert AFI, SAFI to values for |
1383 | * packet. | |
1384 | */ | |
1385 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1386 | &pkt_safi); | |
1387 | stream_putw(s, pkt_afi); | |
1388 | stream_putc(s, pkt_safi); | |
892fedb6 DA |
1389 | if (CHECK_FLAG(peer->bgp->flags, |
1390 | BGP_FLAG_GR_PRESERVE_FWD)) | |
13909c4f DS |
1391 | stream_putc(s, RESTART_F_BIT); |
1392 | else | |
1393 | stream_putc(s, 0); | |
034e185d | 1394 | } |
034e185d | 1395 | } |
13909c4f DS |
1396 | |
1397 | /* Total Graceful restart capability Len. */ | |
1398 | len = stream_get_endp(s) - rcapp - 1; | |
1399 | stream_putc_at(s, rcapp, len); | |
1400 | ||
1401 | /* Total Capability Len. */ | |
1402 | len = stream_get_endp(s) - capp - 1; | |
1403 | stream_putc_at(s, capp, len); | |
034e185d | 1404 | } |
1405 | ||
718e3744 | 1406 | /* Fill in capability open option to the packet. */ |
d62a17ae | 1407 | void bgp_open_capability(struct stream *s, struct peer *peer) |
718e3744 | 1408 | { |
d7c0a89a | 1409 | uint8_t len; |
d62a17ae | 1410 | unsigned long cp, capp, rcapp; |
1411 | iana_afi_t pkt_afi; | |
1412 | afi_t afi; | |
5c525538 RW |
1413 | safi_t safi; |
1414 | iana_safi_t pkt_safi; | |
d62a17ae | 1415 | as_t local_as; |
d7c0a89a | 1416 | uint8_t afi_safi_count = 0; |
d62a17ae | 1417 | int adv_addpath_tx = 0; |
1418 | ||
1419 | /* Remember current pointer for Opt Parm Len. */ | |
1420 | cp = stream_get_endp(s); | |
1421 | ||
1422 | /* Opt Parm Len. */ | |
1423 | stream_putc(s, 0); | |
1424 | ||
1425 | /* Do not send capability. */ | |
1426 | if (!CHECK_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN) | |
1427 | || CHECK_FLAG(peer->flags, PEER_FLAG_DONT_CAPABILITY)) | |
1428 | return; | |
1429 | ||
1430 | /* MP capability for configured AFI, SAFI */ | |
05c7a1cc QY |
1431 | FOREACH_AFI_SAFI (afi, safi) { |
1432 | if (peer->afc[afi][safi]) { | |
1433 | /* Convert AFI, SAFI to values for packet. */ | |
1434 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1435 | &pkt_safi); | |
1436 | ||
1437 | peer->afc_adv[afi][safi] = 1; | |
1438 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1439 | stream_putc(s, CAPABILITY_CODE_MP_LEN + 2); | |
1440 | stream_putc(s, CAPABILITY_CODE_MP); | |
1441 | stream_putc(s, CAPABILITY_CODE_MP_LEN); | |
1442 | stream_putw(s, pkt_afi); | |
1443 | stream_putc(s, 0); | |
1444 | stream_putc(s, pkt_safi); | |
1445 | ||
1446 | /* Extended nexthop capability - currently | |
1447 | * supporting RFC-5549 for | |
1448 | * Link-Local peering only | |
1449 | */ | |
1450 | if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE) | |
1451 | && peer->su.sa.sa_family == AF_INET6 | |
05c7a1cc | 1452 | && afi == AFI_IP |
770df5fd | 1453 | && (safi == SAFI_UNICAST || safi == SAFI_MPLS_VPN |
05c7a1cc QY |
1454 | || safi == SAFI_LABELED_UNICAST)) { |
1455 | /* RFC 5549 Extended Next Hop Encoding | |
1456 | */ | |
1457 | SET_FLAG(peer->cap, PEER_CAP_ENHE_ADV); | |
d62a17ae | 1458 | stream_putc(s, BGP_OPEN_OPT_CAP); |
05c7a1cc QY |
1459 | stream_putc(s, CAPABILITY_CODE_ENHE_LEN + 2); |
1460 | stream_putc(s, CAPABILITY_CODE_ENHE); | |
1461 | stream_putc(s, CAPABILITY_CODE_ENHE_LEN); | |
1462 | ||
1463 | SET_FLAG(peer->af_cap[AFI_IP][safi], | |
1464 | PEER_CAP_ENHE_AF_ADV); | |
d62a17ae | 1465 | stream_putw(s, pkt_afi); |
05c7a1cc QY |
1466 | stream_putw(s, pkt_safi); |
1467 | stream_putw(s, afi_int2iana(AFI_IP6)); | |
d62a17ae | 1468 | |
05c7a1cc QY |
1469 | if (CHECK_FLAG(peer->af_cap[afi][safi], |
1470 | PEER_CAP_ENHE_AF_RCV)) | |
1471 | SET_FLAG(peer->af_cap[afi][safi], | |
1472 | PEER_CAP_ENHE_AF_NEGO); | |
d62a17ae | 1473 | } |
1474 | } | |
05c7a1cc | 1475 | } |
d62a17ae | 1476 | |
1477 | /* Route refresh. */ | |
1478 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_ADV); | |
1479 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1480 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1481 | stream_putc(s, CAPABILITY_CODE_REFRESH_OLD); | |
1482 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1483 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1484 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1485 | stream_putc(s, CAPABILITY_CODE_REFRESH); | |
1486 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1487 | ||
9af52ccf DA |
1488 | /* Enhanced Route Refresh. */ |
1489 | SET_FLAG(peer->cap, PEER_CAP_ENHANCED_RR_ADV); | |
1490 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1491 | stream_putc(s, CAPABILITY_CODE_ENHANCED_LEN + 2); | |
1492 | stream_putc(s, CAPABILITY_CODE_ENHANCED_RR); | |
1493 | stream_putc(s, CAPABILITY_CODE_ENHANCED_LEN); | |
1494 | ||
d62a17ae | 1495 | /* AS4 */ |
1496 | SET_FLAG(peer->cap, PEER_CAP_AS4_ADV); | |
1497 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1498 | stream_putc(s, CAPABILITY_CODE_AS4_LEN + 2); | |
1499 | stream_putc(s, CAPABILITY_CODE_AS4); | |
1500 | stream_putc(s, CAPABILITY_CODE_AS4_LEN); | |
1501 | if (peer->change_local_as) | |
1502 | local_as = peer->change_local_as; | |
1503 | else | |
1504 | local_as = peer->local_as; | |
1505 | stream_putl(s, local_as); | |
1506 | ||
ef56aee4 DA |
1507 | /* Extended Message Support */ |
1508 | SET_FLAG(peer->cap, PEER_CAP_EXTENDED_MESSAGE_ADV); | |
1509 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1510 | stream_putc(s, CAPABILITY_CODE_EXT_MESSAGE_LEN + 2); | |
1511 | stream_putc(s, CAPABILITY_CODE_EXT_MESSAGE); | |
1512 | stream_putc(s, CAPABILITY_CODE_EXT_MESSAGE_LEN); | |
1513 | ||
d62a17ae | 1514 | /* AddPath */ |
05c7a1cc QY |
1515 | FOREACH_AFI_SAFI (afi, safi) { |
1516 | if (peer->afc[afi][safi]) { | |
1517 | afi_safi_count++; | |
1518 | ||
1519 | /* Only advertise addpath TX if a feature that | |
1520 | * will use it is | |
1521 | * configured */ | |
dcc68b5e | 1522 | if (peer->addpath_type[afi][safi] != BGP_ADDPATH_NONE) |
05c7a1cc QY |
1523 | adv_addpath_tx = 1; |
1524 | } | |
1525 | } | |
d62a17ae | 1526 | |
1527 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_ADV); | |
1528 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1529 | stream_putc(s, (CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count) + 2); | |
1530 | stream_putc(s, CAPABILITY_CODE_ADDPATH); | |
1531 | stream_putc(s, CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count); | |
1532 | ||
05c7a1cc QY |
1533 | FOREACH_AFI_SAFI (afi, safi) { |
1534 | if (peer->afc[afi][safi]) { | |
7c0e4312 DA |
1535 | bool adv_addpath_rx = |
1536 | !CHECK_FLAG(peer->af_flags[afi][safi], | |
1537 | PEER_FLAG_DISABLE_ADDPATH_RX); | |
1538 | uint8_t flags = 0; | |
1539 | ||
05c7a1cc QY |
1540 | /* Convert AFI, SAFI to values for packet. */ |
1541 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1542 | &pkt_safi); | |
d62a17ae | 1543 | |
05c7a1cc QY |
1544 | stream_putw(s, pkt_afi); |
1545 | stream_putc(s, pkt_safi); | |
d62a17ae | 1546 | |
7c0e4312 DA |
1547 | if (adv_addpath_rx) { |
1548 | SET_FLAG(flags, BGP_ADDPATH_RX); | |
05c7a1cc QY |
1549 | SET_FLAG(peer->af_cap[afi][safi], |
1550 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
7c0e4312 DA |
1551 | } else { |
1552 | UNSET_FLAG(peer->af_cap[afi][safi], | |
1553 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1554 | } | |
1555 | ||
1556 | if (adv_addpath_tx) { | |
1557 | SET_FLAG(flags, BGP_ADDPATH_TX); | |
05c7a1cc QY |
1558 | SET_FLAG(peer->af_cap[afi][safi], |
1559 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
1560 | } else { | |
05c7a1cc QY |
1561 | UNSET_FLAG(peer->af_cap[afi][safi], |
1562 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
d62a17ae | 1563 | } |
7c0e4312 DA |
1564 | |
1565 | stream_putc(s, flags); | |
05c7a1cc QY |
1566 | } |
1567 | } | |
d62a17ae | 1568 | |
1569 | /* ORF capability. */ | |
05c7a1cc QY |
1570 | FOREACH_AFI_SAFI (afi, safi) { |
1571 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1572 | PEER_FLAG_ORF_PREFIX_SM) | |
1573 | || CHECK_FLAG(peer->af_flags[afi][safi], | |
1574 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1575 | bgp_open_capability_orf(s, peer, afi, safi, | |
1576 | CAPABILITY_CODE_ORF_OLD); | |
1577 | bgp_open_capability_orf(s, peer, afi, safi, | |
1578 | CAPABILITY_CODE_ORF); | |
1579 | } | |
1580 | } | |
d62a17ae | 1581 | |
1582 | /* Dynamic capability. */ | |
1583 | if (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY)) { | |
1584 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_ADV); | |
1585 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1586 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1587 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_OLD); | |
1588 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1589 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1590 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1591 | stream_putc(s, CAPABILITY_CODE_DYNAMIC); | |
1592 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
718e3744 | 1593 | } |
1594 | ||
d62a17ae | 1595 | /* Hostname capability */ |
6b3ee3a0 | 1596 | if (cmd_hostname_get()) { |
d62a17ae | 1597 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_ADV); |
1598 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1599 | rcapp = stream_get_endp(s); /* Ptr to length placeholder */ | |
1600 | stream_putc(s, 0); /* dummy len for now */ | |
1601 | stream_putc(s, CAPABILITY_CODE_FQDN); | |
1602 | capp = stream_get_endp(s); | |
1603 | stream_putc(s, 0); /* dummy len for now */ | |
6b3ee3a0 | 1604 | len = strlen(cmd_hostname_get()); |
d62a17ae | 1605 | if (len > BGP_MAX_HOSTNAME) |
1606 | len = BGP_MAX_HOSTNAME; | |
1607 | ||
1608 | stream_putc(s, len); | |
6b3ee3a0 MK |
1609 | stream_put(s, cmd_hostname_get(), len); |
1610 | if (cmd_domainname_get()) { | |
1611 | len = strlen(cmd_domainname_get()); | |
d62a17ae | 1612 | if (len > BGP_MAX_HOSTNAME) |
1613 | len = BGP_MAX_HOSTNAME; | |
1614 | ||
1615 | stream_putc(s, len); | |
6b3ee3a0 | 1616 | stream_put(s, cmd_domainname_get(), len); |
d62a17ae | 1617 | } else |
d62a17ae | 1618 | stream_putc(s, 0); /* 0 length */ |
04b6bdc0 | 1619 | |
d62a17ae | 1620 | /* Set the lengths straight */ |
1621 | len = stream_get_endp(s) - rcapp - 1; | |
1622 | stream_putc_at(s, rcapp, len); | |
1623 | len = stream_get_endp(s) - capp - 1; | |
1624 | stream_putc_at(s, capp, len); | |
04b6bdc0 | 1625 | |
d62a17ae | 1626 | if (bgp_debug_neighbor_events(peer)) |
d62a17ae | 1627 | zlog_debug( |
1628 | "%s Sending hostname cap with hn = %s, dn = %s", | |
6b3ee3a0 MK |
1629 | peer->host, cmd_hostname_get(), |
1630 | cmd_domainname_get()); | |
d62a17ae | 1631 | } |
1632 | ||
034e185d | 1633 | bgp_peer_send_gr_capability(s, peer, cp); |
d62a17ae | 1634 | |
1635 | /* Total Opt Parm Len. */ | |
1636 | len = stream_get_endp(s) - cp - 1; | |
1637 | stream_putc_at(s, cp, len); | |
718e3744 | 1638 | } |