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