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