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718e3744 | 1 | /* BGP open message handling |
896014f4 DL |
2 | * Copyright (C) 1998, 1999 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "linklist.h" | |
24 | #include "prefix.h" | |
25 | #include "stream.h" | |
26 | #include "thread.h" | |
27 | #include "log.h" | |
28 | #include "command.h" | |
6d58272b | 29 | #include "memory.h" |
3f9c7369 | 30 | #include "queue.h" |
039f3a34 | 31 | #include "filter.h" |
718e3744 | 32 | |
856ca177 | 33 | #include "lib/json.h" |
718e3744 | 34 | #include "bgpd/bgpd.h" |
35 | #include "bgpd/bgp_attr.h" | |
36 | #include "bgpd/bgp_debug.h" | |
37 | #include "bgpd/bgp_fsm.h" | |
38 | #include "bgpd/bgp_packet.h" | |
39 | #include "bgpd/bgp_open.h" | |
0b2aa3a0 | 40 | #include "bgpd/bgp_aspath.h" |
538621f2 | 41 | #include "bgpd/bgp_vty.h" |
4a1ab8e4 | 42 | #include "bgpd/bgp_memory.h" |
538621f2 | 43 | |
718e3744 | 44 | /* BGP-4 Multiprotocol Extentions lead us to the complex world. We can |
45 | negotiate remote peer supports extentions or not. But if | |
46 | remote-peer doesn't supports negotiation process itself. We would | |
47 | like to do manual configuration. | |
48 | ||
49 | So there is many configurable point. First of all we want set each | |
50 | peer whether we send capability negotiation to the peer or not. | |
51 | Next, if we send capability to the peer we want to set my capabilty | |
52 | inforation at each peer. */ | |
53 | ||
d7c0a89a QY |
54 | void bgp_capability_vty_out(struct vty *vty, struct peer *peer, |
55 | uint8_t use_json, json_object *json_neigh) | |
718e3744 | 56 | { |
d62a17ae | 57 | char *pnt; |
58 | char *end; | |
59 | struct capability_mp_data mpc; | |
60 | struct capability_header *hdr; | |
61 | json_object *json_cap = NULL; | |
62 | ||
63 | if (use_json) | |
64 | json_cap = json_object_new_object(); | |
65 | ||
66 | pnt = peer->notify.data; | |
67 | end = pnt + peer->notify.length; | |
68 | ||
69 | while (pnt < end) { | |
70 | if (pnt + sizeof(struct capability_mp_data) + 2 > end) | |
71 | return; | |
72 | ||
73 | hdr = (struct capability_header *)pnt; | |
74 | if (pnt + hdr->length + 2 > end) | |
75 | return; | |
76 | ||
77 | memcpy(&mpc, pnt + 2, sizeof(struct capability_mp_data)); | |
78 | ||
79 | if (hdr->code == CAPABILITY_CODE_MP) { | |
80 | afi_t afi; | |
81 | safi_t safi; | |
82 | ||
da3b87f8 | 83 | (void)bgp_map_afi_safi_iana2int(ntohs(mpc.afi), |
84 | mpc.safi, &afi, &safi); | |
85 | ||
d62a17ae | 86 | if (use_json) { |
87 | switch (afi) { | |
88 | case AFI_IP: | |
89 | json_object_string_add( | |
90 | json_cap, | |
91 | "capabilityErrorMultiProtocolAfi", | |
92 | "IPv4"); | |
93 | break; | |
94 | case AFI_IP6: | |
95 | json_object_string_add( | |
96 | json_cap, | |
97 | "capabilityErrorMultiProtocolAfi", | |
98 | "IPv6"); | |
99 | break; | |
100 | case AFI_L2VPN: | |
101 | json_object_string_add( | |
102 | json_cap, | |
103 | "capabilityErrorMultiProtocolAfi", | |
104 | "L2VPN"); | |
105 | break; | |
106 | default: | |
107 | json_object_int_add( | |
108 | json_cap, | |
109 | "capabilityErrorMultiProtocolAfiUnknown", | |
110 | ntohs(mpc.afi)); | |
111 | break; | |
112 | } | |
113 | switch (safi) { | |
114 | case SAFI_UNICAST: | |
115 | json_object_string_add( | |
116 | json_cap, | |
117 | "capabilityErrorMultiProtocolSafi", | |
118 | "unicast"); | |
119 | break; | |
120 | case SAFI_MULTICAST: | |
121 | json_object_string_add( | |
122 | json_cap, | |
123 | "capabilityErrorMultiProtocolSafi", | |
124 | "multicast"); | |
125 | break; | |
126 | case SAFI_LABELED_UNICAST: | |
127 | json_object_string_add( | |
128 | json_cap, | |
129 | "capabilityErrorMultiProtocolSafi", | |
130 | "labeled-unicast"); | |
131 | break; | |
132 | case SAFI_MPLS_VPN: | |
133 | json_object_string_add( | |
134 | json_cap, | |
135 | "capabilityErrorMultiProtocolSafi", | |
136 | "MPLS-labeled VPN"); | |
137 | break; | |
138 | case SAFI_ENCAP: | |
139 | json_object_string_add( | |
140 | json_cap, | |
141 | "capabilityErrorMultiProtocolSafi", | |
142 | "encap"); | |
143 | break; | |
144 | case SAFI_EVPN: | |
145 | json_object_string_add( | |
146 | json_cap, | |
147 | "capabilityErrorMultiProtocolSafi", | |
148 | "EVPN"); | |
149 | break; | |
7c40bf39 | 150 | case SAFI_FLOWSPEC: |
151 | json_object_string_add( | |
152 | json_cap, | |
153 | "capabilityErrorMultiProtocolSafi", | |
154 | "flowspec"); | |
155 | break; | |
d62a17ae | 156 | default: |
157 | json_object_int_add( | |
158 | json_cap, | |
159 | "capabilityErrorMultiProtocolSafiUnknown", | |
160 | mpc.safi); | |
161 | break; | |
162 | } | |
163 | } else { | |
164 | vty_out(vty, | |
165 | " Capability error for: Multi protocol "); | |
166 | switch (afi) { | |
167 | case AFI_IP: | |
168 | vty_out(vty, "AFI IPv4, "); | |
169 | break; | |
170 | case AFI_IP6: | |
171 | vty_out(vty, "AFI IPv6, "); | |
172 | break; | |
173 | case AFI_L2VPN: | |
174 | vty_out(vty, "AFI L2VPN, "); | |
175 | break; | |
176 | default: | |
177 | vty_out(vty, "AFI Unknown %d, ", | |
178 | ntohs(mpc.afi)); | |
179 | break; | |
180 | } | |
181 | switch (safi) { | |
182 | case SAFI_UNICAST: | |
183 | vty_out(vty, "SAFI Unicast"); | |
184 | break; | |
185 | case SAFI_MULTICAST: | |
186 | vty_out(vty, "SAFI Multicast"); | |
187 | break; | |
188 | case SAFI_LABELED_UNICAST: | |
189 | vty_out(vty, "SAFI Labeled-unicast"); | |
190 | break; | |
191 | case SAFI_MPLS_VPN: | |
192 | vty_out(vty, "SAFI MPLS-labeled VPN"); | |
193 | break; | |
194 | case SAFI_ENCAP: | |
195 | vty_out(vty, "SAFI ENCAP"); | |
196 | break; | |
7c40bf39 | 197 | case SAFI_FLOWSPEC: |
198 | vty_out(vty, "SAFI FLOWSPEC"); | |
199 | break; | |
d62a17ae | 200 | case SAFI_EVPN: |
201 | vty_out(vty, "SAFI EVPN"); | |
202 | break; | |
203 | default: | |
204 | vty_out(vty, "SAFI Unknown %d ", | |
205 | mpc.safi); | |
206 | break; | |
207 | } | |
208 | vty_out(vty, "\n"); | |
209 | } | |
210 | } else if (hdr->code >= 128) { | |
211 | if (use_json) | |
212 | json_object_int_add( | |
213 | json_cap, | |
214 | "capabilityErrorVendorSpecificCapabilityCode", | |
215 | hdr->code); | |
216 | else | |
217 | vty_out(vty, | |
218 | " Capability error: vendor specific capability code %d", | |
219 | hdr->code); | |
220 | } else { | |
221 | if (use_json) | |
222 | json_object_int_add( | |
223 | json_cap, | |
224 | "capabilityErrorUnknownCapabilityCode", | |
225 | hdr->code); | |
226 | else | |
227 | vty_out(vty, | |
228 | " Capability error: unknown capability code %d", | |
229 | hdr->code); | |
230 | } | |
231 | pnt += hdr->length + 2; | |
232 | } | |
233 | if (use_json) | |
234 | json_object_object_add(json_neigh, "capabilityErrors", | |
235 | json_cap); | |
718e3744 | 236 | } |
237 | ||
d62a17ae | 238 | static void bgp_capability_mp_data(struct stream *s, |
239 | struct capability_mp_data *mpc) | |
718e3744 | 240 | { |
d62a17ae | 241 | mpc->afi = stream_getw(s); |
242 | mpc->reserved = stream_getc(s); | |
243 | mpc->safi = stream_getc(s); | |
6d58272b | 244 | } |
718e3744 | 245 | |
6d58272b | 246 | /* Set negotiated capability value. */ |
d62a17ae | 247 | static int bgp_capability_mp(struct peer *peer, struct capability_header *hdr) |
6d58272b | 248 | { |
d62a17ae | 249 | struct capability_mp_data mpc; |
250 | struct stream *s = BGP_INPUT(peer); | |
251 | afi_t afi; | |
252 | safi_t safi; | |
253 | ||
254 | /* Verify length is 4 */ | |
255 | if (hdr->length != 4) { | |
256 | zlog_warn( | |
257 | "MP Cap: Received invalid length %d, non-multiple of 4", | |
258 | hdr->length); | |
259 | return -1; | |
260 | } | |
261 | ||
262 | bgp_capability_mp_data(s, &mpc); | |
263 | ||
264 | if (bgp_debug_neighbor_events(peer)) | |
265 | zlog_debug("%s OPEN has MP_EXT CAP for afi/safi: %u/%u", | |
266 | peer->host, mpc.afi, mpc.safi); | |
267 | ||
268 | /* Convert AFI, SAFI to internal values, check. */ | |
269 | if (bgp_map_afi_safi_iana2int(mpc.afi, mpc.safi, &afi, &safi)) | |
270 | return -1; | |
271 | ||
272 | /* Now safi remapped, and afi/safi are valid array indices */ | |
273 | peer->afc_recv[afi][safi] = 1; | |
274 | ||
275 | if (peer->afc[afi][safi]) | |
276 | peer->afc_nego[afi][safi] = 1; | |
277 | else | |
278 | return -1; | |
279 | ||
280 | return 0; | |
718e3744 | 281 | } |
282 | ||
d62a17ae | 283 | static void bgp_capability_orf_not_support(struct peer *peer, iana_afi_t afi, |
d7c0a89a QY |
284 | iana_safi_t safi, uint8_t type, |
285 | uint8_t mode) | |
718e3744 | 286 | { |
d62a17ae | 287 | if (bgp_debug_neighbor_events(peer)) |
288 | zlog_debug( | |
289 | "%s Addr-family %d/%d has ORF type/mode %d/%d not supported", | |
290 | peer->host, afi, safi, type, mode); | |
718e3744 | 291 | } |
292 | ||
d62a17ae | 293 | static const struct message orf_type_str[] = { |
294 | {ORF_TYPE_PREFIX, "Prefixlist"}, | |
295 | {ORF_TYPE_PREFIX_OLD, "Prefixlist (old)"}, | |
296 | {0}}; | |
6d58272b | 297 | |
d62a17ae | 298 | static const struct message orf_mode_str[] = {{ORF_MODE_RECEIVE, "Receive"}, |
299 | {ORF_MODE_SEND, "Send"}, | |
300 | {ORF_MODE_BOTH, "Both"}, | |
301 | {0}}; | |
6d58272b | 302 | |
d62a17ae | 303 | static int bgp_capability_orf_entry(struct peer *peer, |
304 | struct capability_header *hdr) | |
718e3744 | 305 | { |
d62a17ae | 306 | struct stream *s = BGP_INPUT(peer); |
307 | struct capability_mp_data mpc; | |
d7c0a89a | 308 | uint8_t num; |
d62a17ae | 309 | iana_afi_t pkt_afi; |
310 | afi_t afi; | |
5c525538 RW |
311 | iana_safi_t pkt_safi; |
312 | safi_t safi; | |
d7c0a89a QY |
313 | uint8_t type; |
314 | uint8_t mode; | |
315 | uint16_t sm_cap = 0; /* capability send-mode receive */ | |
316 | uint16_t rm_cap = 0; /* capability receive-mode receive */ | |
d62a17ae | 317 | int i; |
318 | ||
319 | /* ORF Entry header */ | |
320 | bgp_capability_mp_data(s, &mpc); | |
321 | num = stream_getc(s); | |
322 | pkt_afi = mpc.afi; | |
323 | pkt_safi = mpc.safi; | |
324 | ||
325 | if (bgp_debug_neighbor_events(peer)) | |
326 | zlog_debug("%s ORF Cap entry for afi/safi: %u/%u", peer->host, | |
327 | mpc.afi, mpc.safi); | |
328 | ||
329 | /* Convert AFI, SAFI to internal values, check. */ | |
330 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
331 | zlog_info( | |
332 | "%s Addr-family %d/%d not supported." | |
333 | " Ignoring the ORF capability", | |
334 | peer->host, pkt_afi, pkt_safi); | |
335 | return 0; | |
718e3744 | 336 | } |
d62a17ae | 337 | |
338 | mpc.afi = pkt_afi; | |
339 | mpc.safi = safi; | |
340 | ||
341 | /* validate number field */ | |
342 | if (CAPABILITY_CODE_ORF_LEN + (num * 2) > hdr->length) { | |
343 | zlog_info( | |
344 | "%s ORF Capability entry length error," | |
345 | " Cap length %u, num %u", | |
346 | peer->host, hdr->length, num); | |
347 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
348 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
349 | return -1; | |
718e3744 | 350 | } |
351 | ||
d62a17ae | 352 | for (i = 0; i < num; i++) { |
353 | type = stream_getc(s); | |
354 | mode = stream_getc(s); | |
355 | ||
356 | /* ORF Mode error check */ | |
357 | switch (mode) { | |
358 | case ORF_MODE_BOTH: | |
359 | case ORF_MODE_SEND: | |
360 | case ORF_MODE_RECEIVE: | |
361 | break; | |
362 | default: | |
363 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
364 | type, mode); | |
365 | continue; | |
366 | } | |
367 | /* ORF Type and afi/safi error checks */ | |
368 | /* capcode versus type */ | |
369 | switch (hdr->code) { | |
370 | case CAPABILITY_CODE_ORF: | |
371 | switch (type) { | |
372 | case ORF_TYPE_PREFIX: | |
373 | break; | |
374 | default: | |
375 | bgp_capability_orf_not_support( | |
376 | peer, pkt_afi, pkt_safi, type, mode); | |
377 | continue; | |
378 | } | |
379 | break; | |
380 | case CAPABILITY_CODE_ORF_OLD: | |
381 | switch (type) { | |
382 | case ORF_TYPE_PREFIX_OLD: | |
383 | break; | |
384 | default: | |
385 | bgp_capability_orf_not_support( | |
386 | peer, pkt_afi, pkt_safi, type, mode); | |
387 | continue; | |
388 | } | |
389 | break; | |
390 | default: | |
391 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
392 | type, mode); | |
393 | continue; | |
394 | } | |
395 | ||
396 | /* AFI vs SAFI */ | |
397 | if (!((afi == AFI_IP && safi == SAFI_UNICAST) | |
398 | || (afi == AFI_IP && safi == SAFI_MULTICAST) | |
399 | || (afi == AFI_IP6 && safi == SAFI_UNICAST))) { | |
400 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
401 | type, mode); | |
402 | continue; | |
403 | } | |
404 | ||
405 | if (bgp_debug_neighbor_events(peer)) | |
406 | zlog_debug( | |
407 | "%s OPEN has %s ORF capability" | |
408 | " as %s for afi/safi: %d/%d", | |
409 | peer->host, | |
410 | lookup_msg(orf_type_str, type, NULL), | |
411 | lookup_msg(orf_mode_str, mode, NULL), pkt_afi, | |
412 | pkt_safi); | |
413 | ||
414 | if (hdr->code == CAPABILITY_CODE_ORF) { | |
415 | sm_cap = PEER_CAP_ORF_PREFIX_SM_RCV; | |
416 | rm_cap = PEER_CAP_ORF_PREFIX_RM_RCV; | |
417 | } else if (hdr->code == CAPABILITY_CODE_ORF_OLD) { | |
418 | sm_cap = PEER_CAP_ORF_PREFIX_SM_OLD_RCV; | |
419 | rm_cap = PEER_CAP_ORF_PREFIX_RM_OLD_RCV; | |
420 | } else { | |
421 | bgp_capability_orf_not_support(peer, pkt_afi, pkt_safi, | |
422 | type, mode); | |
423 | continue; | |
424 | } | |
425 | ||
426 | switch (mode) { | |
427 | case ORF_MODE_BOTH: | |
428 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
429 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
430 | break; | |
431 | case ORF_MODE_SEND: | |
432 | SET_FLAG(peer->af_cap[afi][safi], sm_cap); | |
433 | break; | |
434 | case ORF_MODE_RECEIVE: | |
435 | SET_FLAG(peer->af_cap[afi][safi], rm_cap); | |
436 | break; | |
437 | } | |
718e3744 | 438 | } |
d62a17ae | 439 | return 0; |
718e3744 | 440 | } |
441 | ||
d62a17ae | 442 | static int bgp_capability_restart(struct peer *peer, |
443 | struct capability_header *caphdr) | |
6d58272b | 444 | { |
d62a17ae | 445 | struct stream *s = BGP_INPUT(peer); |
d7c0a89a | 446 | uint16_t restart_flag_time; |
d62a17ae | 447 | size_t end = stream_get_getp(s) + caphdr->length; |
448 | ||
449 | /* Verify length is a multiple of 4 */ | |
450 | if ((caphdr->length - 2) % 4) { | |
451 | zlog_warn( | |
452 | "Restart Cap: Received invalid length %d, non-multiple of 4", | |
453 | caphdr->length); | |
454 | return -1; | |
455 | } | |
456 | ||
457 | SET_FLAG(peer->cap, PEER_CAP_RESTART_RCV); | |
458 | restart_flag_time = stream_getw(s); | |
459 | if (CHECK_FLAG(restart_flag_time, RESTART_R_BIT)) | |
460 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV); | |
461 | ||
462 | UNSET_FLAG(restart_flag_time, 0xF000); | |
463 | peer->v_gr_restart = restart_flag_time; | |
464 | ||
465 | if (bgp_debug_neighbor_events(peer)) { | |
466 | zlog_debug("%s OPEN has Graceful Restart capability", | |
467 | peer->host); | |
468 | zlog_debug("%s Peer has%srestarted. Restart Time : %d", | |
469 | peer->host, | |
470 | CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV) | |
471 | ? " " | |
472 | : " not ", | |
473 | peer->v_gr_restart); | |
474 | } | |
475 | ||
476 | while (stream_get_getp(s) + 4 <= end) { | |
477 | afi_t afi; | |
478 | safi_t safi; | |
479 | iana_afi_t pkt_afi = stream_getw(s); | |
5c525538 | 480 | iana_safi_t pkt_safi = stream_getc(s); |
d7c0a89a | 481 | uint8_t flag = stream_getc(s); |
d62a17ae | 482 | |
483 | /* Convert AFI, SAFI to internal values, check. */ | |
484 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
485 | if (bgp_debug_neighbor_events(peer)) | |
486 | zlog_debug( | |
487 | "%s Addr-family %d/%d(afi/safi) not supported." | |
488 | " Ignore the Graceful Restart capability for this AFI/SAFI", | |
489 | peer->host, pkt_afi, pkt_safi); | |
490 | } else if (!peer->afc[afi][safi]) { | |
491 | if (bgp_debug_neighbor_events(peer)) | |
492 | zlog_debug( | |
493 | "%s Addr-family %d/%d(afi/safi) not enabled." | |
494 | " Ignore the Graceful Restart capability", | |
495 | peer->host, pkt_afi, pkt_safi); | |
496 | } else { | |
497 | if (bgp_debug_neighbor_events(peer)) | |
498 | zlog_debug( | |
499 | "%s Address family %s is%spreserved", | |
500 | peer->host, afi_safi_print(afi, safi), | |
501 | CHECK_FLAG( | |
502 | peer->af_cap[afi][safi], | |
503 | PEER_CAP_RESTART_AF_PRESERVE_RCV) | |
504 | ? " " | |
505 | : " not "); | |
506 | ||
507 | SET_FLAG(peer->af_cap[afi][safi], | |
508 | PEER_CAP_RESTART_AF_RCV); | |
509 | if (CHECK_FLAG(flag, RESTART_F_BIT)) | |
510 | SET_FLAG(peer->af_cap[afi][safi], | |
511 | PEER_CAP_RESTART_AF_PRESERVE_RCV); | |
512 | } | |
513 | } | |
514 | return 0; | |
6d58272b | 515 | } |
718e3744 | 516 | |
14051b36 | 517 | /* Unlike other capability parsing routines, this one returns 0 on error */ |
d62a17ae | 518 | static as_t bgp_capability_as4(struct peer *peer, struct capability_header *hdr) |
0b2aa3a0 | 519 | { |
d62a17ae | 520 | SET_FLAG(peer->cap, PEER_CAP_AS4_RCV); |
521 | ||
522 | if (hdr->length != CAPABILITY_CODE_AS4_LEN) { | |
523 | zlog_err("%s AS4 capability has incorrect data length %d", | |
524 | peer->host, hdr->length); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | as_t as4 = stream_getl(BGP_INPUT(peer)); | |
529 | ||
530 | if (BGP_DEBUG(as4, AS4)) | |
531 | zlog_debug( | |
532 | "%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u", | |
533 | peer->host, as4); | |
534 | return as4; | |
0b2aa3a0 PJ |
535 | } |
536 | ||
d62a17ae | 537 | static int bgp_capability_addpath(struct peer *peer, |
538 | struct capability_header *hdr) | |
a82478b9 | 539 | { |
d62a17ae | 540 | struct stream *s = BGP_INPUT(peer); |
541 | size_t end = stream_get_getp(s) + hdr->length; | |
542 | ||
543 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_RCV); | |
544 | ||
545 | /* Verify length is a multiple of 4 */ | |
546 | if (hdr->length % 4) { | |
547 | zlog_warn( | |
548 | "Add Path: Received invalid length %d, non-multiple of 4", | |
549 | hdr->length); | |
550 | return -1; | |
551 | } | |
552 | ||
553 | while (stream_get_getp(s) + 4 <= end) { | |
554 | afi_t afi; | |
555 | safi_t safi; | |
556 | iana_afi_t pkt_afi = stream_getw(s); | |
5c525538 | 557 | iana_safi_t pkt_safi = stream_getc(s); |
d7c0a89a | 558 | uint8_t send_receive = stream_getc(s); |
d62a17ae | 559 | |
560 | if (bgp_debug_neighbor_events(peer)) | |
561 | zlog_debug( | |
562 | "%s OPEN has AddPath CAP for afi/safi: %u/%u%s%s", | |
563 | peer->host, pkt_afi, pkt_safi, | |
564 | (send_receive & BGP_ADDPATH_RX) ? ", receive" | |
565 | : "", | |
566 | (send_receive & BGP_ADDPATH_TX) ? ", transmit" | |
567 | : ""); | |
568 | ||
569 | /* Convert AFI, SAFI to internal values, check. */ | |
570 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
571 | if (bgp_debug_neighbor_events(peer)) | |
572 | zlog_debug( | |
573 | "%s Addr-family %d/%d(afi/safi) not supported." | |
574 | " Ignore the Addpath Attribute for this AFI/SAFI", | |
575 | peer->host, pkt_afi, pkt_safi); | |
576 | continue; | |
577 | } else if (!peer->afc[afi][safi]) { | |
578 | if (bgp_debug_neighbor_events(peer)) | |
579 | zlog_debug( | |
580 | "%s Addr-family %d/%d(afi/safi) not enabled." | |
581 | " Ignore the AddPath capability for this AFI/SAFI", | |
582 | peer->host, pkt_afi, pkt_safi); | |
583 | continue; | |
584 | } | |
585 | ||
586 | if (send_receive & BGP_ADDPATH_RX) | |
587 | SET_FLAG(peer->af_cap[afi][safi], | |
588 | PEER_CAP_ADDPATH_AF_RX_RCV); | |
589 | ||
590 | if (send_receive & BGP_ADDPATH_TX) | |
591 | SET_FLAG(peer->af_cap[afi][safi], | |
592 | PEER_CAP_ADDPATH_AF_TX_RCV); | |
593 | } | |
594 | ||
595 | return 0; | |
a82478b9 DS |
596 | } |
597 | ||
d62a17ae | 598 | static int bgp_capability_enhe(struct peer *peer, struct capability_header *hdr) |
8a92a8a0 | 599 | { |
d62a17ae | 600 | struct stream *s = BGP_INPUT(peer); |
601 | size_t end = stream_get_getp(s) + hdr->length; | |
602 | ||
603 | /* Verify length is a multiple of 4 */ | |
604 | if (hdr->length % 6) { | |
605 | zlog_warn( | |
606 | "Extended NH: Received invalid length %d, non-multiple of 6", | |
607 | hdr->length); | |
608 | return -1; | |
609 | } | |
610 | ||
611 | while (stream_get_getp(s) + 6 <= end) { | |
612 | iana_afi_t pkt_afi = stream_getw(s); | |
613 | afi_t afi; | |
5c525538 RW |
614 | iana_safi_t pkt_safi = stream_getw(s); |
615 | safi_t safi; | |
d62a17ae | 616 | iana_afi_t pkt_nh_afi = stream_getw(s); |
617 | afi_t nh_afi; | |
618 | ||
619 | if (bgp_debug_neighbor_events(peer)) | |
620 | zlog_debug( | |
621 | "%s Received with afi/safi/next-hop afi: %u/%u/%u", | |
622 | peer->host, pkt_afi, pkt_safi, pkt_nh_afi); | |
623 | ||
624 | /* Convert AFI, SAFI to internal values, check. */ | |
625 | if (bgp_map_afi_safi_iana2int(pkt_afi, pkt_safi, &afi, &safi)) { | |
626 | if (bgp_debug_neighbor_events(peer)) | |
627 | zlog_debug( | |
628 | "%s Addr-family %d/%d(afi/safi) not supported." | |
629 | " Ignore the ENHE Attribute for this AFI/SAFI", | |
630 | peer->host, pkt_afi, pkt_safi); | |
631 | continue; | |
632 | } | |
633 | ||
634 | /* RFC 5549 specifies use of this capability only for IPv4 AFI, | |
635 | * with | |
636 | * the Nexthop AFI being IPv6. A future spec may introduce other | |
637 | * possibilities, so we ignore other values with a log. Also, | |
638 | * only | |
639 | * SAFI_UNICAST and SAFI_LABELED_UNICAST are currently supported | |
640 | * (and expected). | |
641 | */ | |
642 | nh_afi = afi_iana2int(pkt_nh_afi); | |
643 | ||
644 | if (afi != AFI_IP || nh_afi != AFI_IP6 | |
645 | || !(safi == SAFI_UNICAST | |
646 | || safi == SAFI_LABELED_UNICAST)) { | |
647 | zlog_warn( | |
648 | "%s Unexpected afi/safi/next-hop afi: %u/%u/%u " | |
649 | "in Extended Next-hop capability, ignoring", | |
650 | peer->host, pkt_afi, pkt_safi, pkt_nh_afi); | |
651 | continue; | |
652 | } | |
653 | ||
654 | SET_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV); | |
655 | ||
656 | if (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_ADV)) | |
657 | SET_FLAG(peer->af_cap[afi][safi], | |
658 | PEER_CAP_ENHE_AF_NEGO); | |
659 | } | |
660 | ||
661 | SET_FLAG(peer->cap, PEER_CAP_ENHE_RCV); | |
662 | ||
663 | return 0; | |
8a92a8a0 DS |
664 | } |
665 | ||
d62a17ae | 666 | static int bgp_capability_hostname(struct peer *peer, |
667 | struct capability_header *hdr) | |
04b6bdc0 | 668 | { |
d62a17ae | 669 | struct stream *s = BGP_INPUT(peer); |
670 | char str[BGP_MAX_HOSTNAME + 1]; | |
671 | size_t end = stream_get_getp(s) + hdr->length; | |
d7c0a89a | 672 | uint8_t len; |
d62a17ae | 673 | |
674 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_RCV); | |
675 | ||
676 | len = stream_getc(s); | |
677 | if (stream_get_getp(s) + len > end) { | |
678 | zlog_warn( | |
679 | "%s: Received malformed hostname capability from peer %s", | |
680 | __FUNCTION__, peer->host); | |
681 | return -1; | |
682 | } | |
683 | ||
684 | if (len > BGP_MAX_HOSTNAME) { | |
685 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
686 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
687 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
688 | } else if (len) | |
689 | stream_get(str, s, len); | |
690 | ||
691 | if (len) { | |
692 | str[len] = '\0'; | |
693 | ||
694 | if (peer->hostname != NULL) { | |
695 | XFREE(MTYPE_BGP_PEER_HOST, peer->hostname); | |
696 | peer->hostname = NULL; | |
697 | } | |
698 | ||
699 | if (peer->domainname != NULL) { | |
700 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); | |
701 | peer->domainname = NULL; | |
702 | } | |
703 | ||
704 | peer->hostname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); | |
705 | } | |
706 | ||
707 | if (stream_get_getp(s) + 1 > end) { | |
708 | zlog_warn( | |
709 | "%s: Received invalid domain name len (hostname capability) from peer %s", | |
710 | __FUNCTION__, peer->host); | |
711 | return -1; | |
712 | } | |
713 | ||
714 | len = stream_getc(s); | |
715 | if (stream_get_getp(s) + len > end) { | |
716 | zlog_warn( | |
717 | "%s: Received runt domain name (hostname capability) from peer %s", | |
718 | __FUNCTION__, peer->host); | |
719 | return -1; | |
720 | } | |
721 | ||
722 | if (len > BGP_MAX_HOSTNAME) { | |
723 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
724 | stream_forward_getp(s, len - BGP_MAX_HOSTNAME); | |
725 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
726 | } else if (len) | |
727 | stream_get(str, s, len); | |
728 | ||
729 | if (len) { | |
730 | str[len] = '\0'; | |
731 | peer->domainname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); | |
732 | } | |
733 | ||
734 | if (bgp_debug_neighbor_events(peer)) { | |
735 | zlog_debug("%s received hostname %s, domainname %s", peer->host, | |
736 | peer->hostname, peer->domainname); | |
737 | } | |
738 | ||
739 | return 0; | |
04b6bdc0 DW |
740 | } |
741 | ||
d62a17ae | 742 | static const struct message capcode_str[] = { |
743 | {CAPABILITY_CODE_MP, "MultiProtocol Extensions"}, | |
744 | {CAPABILITY_CODE_REFRESH, "Route Refresh"}, | |
745 | {CAPABILITY_CODE_ORF, "Cooperative Route Filtering"}, | |
746 | {CAPABILITY_CODE_RESTART, "Graceful Restart"}, | |
747 | {CAPABILITY_CODE_AS4, "4-octet AS number"}, | |
748 | {CAPABILITY_CODE_ADDPATH, "AddPath"}, | |
749 | {CAPABILITY_CODE_DYNAMIC, "Dynamic"}, | |
750 | {CAPABILITY_CODE_ENHE, "Extended Next Hop Encoding"}, | |
751 | {CAPABILITY_CODE_DYNAMIC_OLD, "Dynamic (Old)"}, | |
752 | {CAPABILITY_CODE_REFRESH_OLD, "Route Refresh (Old)"}, | |
753 | {CAPABILITY_CODE_ORF_OLD, "ORF (Old)"}, | |
754 | {CAPABILITY_CODE_FQDN, "FQDN"}, | |
755 | {0}}; | |
6d58272b PJ |
756 | |
757 | /* Minimum sizes for length field of each cap (so not inc. the header) */ | |
d62a17ae | 758 | static const size_t cap_minsizes[] = { |
9d303b37 DL |
759 | [CAPABILITY_CODE_MP] = CAPABILITY_CODE_MP_LEN, |
760 | [CAPABILITY_CODE_REFRESH] = CAPABILITY_CODE_REFRESH_LEN, | |
761 | [CAPABILITY_CODE_ORF] = CAPABILITY_CODE_ORF_LEN, | |
762 | [CAPABILITY_CODE_RESTART] = CAPABILITY_CODE_RESTART_LEN, | |
763 | [CAPABILITY_CODE_AS4] = CAPABILITY_CODE_AS4_LEN, | |
764 | [CAPABILITY_CODE_ADDPATH] = CAPABILITY_CODE_ADDPATH_LEN, | |
765 | [CAPABILITY_CODE_DYNAMIC] = CAPABILITY_CODE_DYNAMIC_LEN, | |
766 | [CAPABILITY_CODE_DYNAMIC_OLD] = CAPABILITY_CODE_DYNAMIC_LEN, | |
767 | [CAPABILITY_CODE_ENHE] = CAPABILITY_CODE_ENHE_LEN, | |
768 | [CAPABILITY_CODE_REFRESH_OLD] = CAPABILITY_CODE_REFRESH_LEN, | |
769 | [CAPABILITY_CODE_ORF_OLD] = CAPABILITY_CODE_ORF_LEN, | |
770 | [CAPABILITY_CODE_FQDN] = CAPABILITY_CODE_MIN_FQDN_LEN, | |
6d58272b PJ |
771 | }; |
772 | ||
695ef95f PJ |
773 | /* value the capability must be a multiple of. |
774 | * 0-data capabilities won't be checked against this. | |
775 | * Other capabilities whose data doesn't fall on convenient boundaries for this | |
776 | * table should be set to 1. | |
777 | */ | |
d62a17ae | 778 | static const size_t cap_modsizes[] = { |
9d303b37 DL |
779 | [CAPABILITY_CODE_MP] = 4, |
780 | [CAPABILITY_CODE_REFRESH] = 1, | |
781 | [CAPABILITY_CODE_ORF] = 1, | |
782 | [CAPABILITY_CODE_RESTART] = 1, | |
783 | [CAPABILITY_CODE_AS4] = 4, | |
784 | [CAPABILITY_CODE_ADDPATH] = 4, | |
785 | [CAPABILITY_CODE_DYNAMIC] = 1, | |
786 | [CAPABILITY_CODE_DYNAMIC_OLD] = 1, | |
787 | [CAPABILITY_CODE_ENHE] = 6, | |
788 | [CAPABILITY_CODE_REFRESH_OLD] = 1, | |
789 | [CAPABILITY_CODE_ORF_OLD] = 1, | |
790 | [CAPABILITY_CODE_FQDN] = 1, | |
695ef95f PJ |
791 | }; |
792 | ||
3b381c32 AS |
793 | /** |
794 | * Parse given capability. | |
6d58272b | 795 | * XXX: This is reading into a stream, but not using stream API |
3b381c32 AS |
796 | * |
797 | * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol | |
798 | * capabilities were encountered. | |
6d58272b | 799 | */ |
d62a17ae | 800 | static int bgp_capability_parse(struct peer *peer, size_t length, |
d7c0a89a | 801 | int *mp_capability, uint8_t **error) |
6d58272b | 802 | { |
d62a17ae | 803 | int ret; |
804 | struct stream *s = BGP_INPUT(peer); | |
805 | size_t end = stream_get_getp(s) + length; | |
806 | ||
807 | assert(STREAM_READABLE(s) >= length); | |
808 | ||
809 | while (stream_get_getp(s) < end) { | |
810 | size_t start; | |
d7c0a89a | 811 | uint8_t *sp = stream_pnt(s); |
d62a17ae | 812 | struct capability_header caphdr; |
813 | ||
814 | ret = 0; | |
815 | /* We need at least capability code and capability length. */ | |
816 | if (stream_get_getp(s) + 2 > end) { | |
817 | zlog_info("%s Capability length error (< header)", | |
818 | peer->host); | |
819 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
820 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
821 | return -1; | |
822 | } | |
823 | ||
824 | caphdr.code = stream_getc(s); | |
825 | caphdr.length = stream_getc(s); | |
826 | start = stream_get_getp(s); | |
827 | ||
828 | /* Capability length check sanity check. */ | |
829 | if (start + caphdr.length > end) { | |
830 | zlog_info("%s Capability length error (< length)", | |
831 | peer->host); | |
832 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
833 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
834 | return -1; | |
835 | } | |
836 | ||
837 | if (bgp_debug_neighbor_events(peer)) | |
838 | zlog_debug("%s OPEN has %s capability (%u), length %u", | |
839 | peer->host, | |
840 | lookup_msg(capcode_str, caphdr.code, NULL), | |
841 | caphdr.code, caphdr.length); | |
842 | ||
843 | /* Length sanity check, type-specific, for known capabilities */ | |
844 | switch (caphdr.code) { | |
845 | case CAPABILITY_CODE_MP: | |
846 | case CAPABILITY_CODE_REFRESH: | |
847 | case CAPABILITY_CODE_REFRESH_OLD: | |
848 | case CAPABILITY_CODE_ORF: | |
849 | case CAPABILITY_CODE_ORF_OLD: | |
850 | case CAPABILITY_CODE_RESTART: | |
851 | case CAPABILITY_CODE_AS4: | |
852 | case CAPABILITY_CODE_ADDPATH: | |
853 | case CAPABILITY_CODE_DYNAMIC: | |
854 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
855 | case CAPABILITY_CODE_ENHE: | |
856 | case CAPABILITY_CODE_FQDN: | |
857 | /* Check length. */ | |
858 | if (caphdr.length < cap_minsizes[caphdr.code]) { | |
859 | zlog_info( | |
860 | "%s %s Capability length error: got %u," | |
861 | " expected at least %u", | |
862 | peer->host, | |
863 | lookup_msg(capcode_str, caphdr.code, | |
864 | NULL), | |
865 | caphdr.length, | |
866 | (unsigned)cap_minsizes[caphdr.code]); | |
867 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
868 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
869 | return -1; | |
870 | } | |
871 | if (caphdr.length | |
872 | && caphdr.length % cap_modsizes[caphdr.code] != 0) { | |
873 | zlog_info( | |
874 | "%s %s Capability length error: got %u," | |
875 | " expected a multiple of %u", | |
876 | peer->host, | |
877 | lookup_msg(capcode_str, caphdr.code, | |
878 | NULL), | |
879 | caphdr.length, | |
880 | (unsigned)cap_modsizes[caphdr.code]); | |
881 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
882 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
883 | return -1; | |
884 | } | |
885 | /* we deliberately ignore unknown codes, see below */ | |
886 | default: | |
887 | break; | |
888 | } | |
889 | ||
890 | switch (caphdr.code) { | |
891 | case CAPABILITY_CODE_MP: { | |
892 | *mp_capability = 1; | |
893 | ||
894 | /* Ignore capability when override-capability is set. */ | |
895 | if (!CHECK_FLAG(peer->flags, | |
896 | PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
897 | /* Set negotiated value. */ | |
898 | ret = bgp_capability_mp(peer, &caphdr); | |
899 | ||
900 | /* Unsupported Capability. */ | |
901 | if (ret < 0) { | |
902 | /* Store return data. */ | |
903 | memcpy(*error, sp, caphdr.length + 2); | |
904 | *error += caphdr.length + 2; | |
905 | } | |
906 | ret = 0; /* Don't return error for this */ | |
907 | } | |
908 | } break; | |
909 | case CAPABILITY_CODE_REFRESH: | |
910 | case CAPABILITY_CODE_REFRESH_OLD: { | |
911 | /* BGP refresh capability */ | |
912 | if (caphdr.code == CAPABILITY_CODE_REFRESH_OLD) | |
913 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV); | |
914 | else | |
915 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV); | |
916 | } break; | |
917 | case CAPABILITY_CODE_ORF: | |
918 | case CAPABILITY_CODE_ORF_OLD: | |
919 | ret = bgp_capability_orf_entry(peer, &caphdr); | |
920 | break; | |
921 | case CAPABILITY_CODE_RESTART: | |
922 | ret = bgp_capability_restart(peer, &caphdr); | |
923 | break; | |
924 | case CAPABILITY_CODE_DYNAMIC: | |
925 | case CAPABILITY_CODE_DYNAMIC_OLD: | |
926 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV); | |
927 | break; | |
928 | case CAPABILITY_CODE_AS4: | |
929 | /* Already handled as a special-case parsing of the | |
930 | * capabilities | |
931 | * at the beginning of OPEN processing. So we care not a | |
932 | * jot | |
933 | * for the value really, only error case. | |
934 | */ | |
935 | if (!bgp_capability_as4(peer, &caphdr)) | |
936 | ret = -1; | |
937 | break; | |
938 | case CAPABILITY_CODE_ADDPATH: | |
939 | ret = bgp_capability_addpath(peer, &caphdr); | |
940 | break; | |
941 | case CAPABILITY_CODE_ENHE: | |
942 | ret = bgp_capability_enhe(peer, &caphdr); | |
943 | break; | |
944 | case CAPABILITY_CODE_FQDN: | |
945 | ret = bgp_capability_hostname(peer, &caphdr); | |
946 | break; | |
947 | default: | |
948 | if (caphdr.code > 128) { | |
949 | /* We don't send Notification for unknown vendor | |
950 | specific | |
951 | capabilities. It seems reasonable for now... | |
952 | */ | |
953 | zlog_warn("%s Vendor specific capability %d", | |
954 | peer->host, caphdr.code); | |
955 | } else { | |
956 | zlog_warn( | |
957 | "%s unrecognized capability code: %d - ignored", | |
958 | peer->host, caphdr.code); | |
959 | memcpy(*error, sp, caphdr.length + 2); | |
960 | *error += caphdr.length + 2; | |
961 | } | |
962 | } | |
963 | ||
964 | if (ret < 0) { | |
965 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
966 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
967 | return -1; | |
968 | } | |
969 | if (stream_get_getp(s) != (start + caphdr.length)) { | |
970 | if (stream_get_getp(s) > (start + caphdr.length)) | |
971 | zlog_warn( | |
972 | "%s Cap-parser for %s read past cap-length, %u!", | |
973 | peer->host, | |
974 | lookup_msg(capcode_str, caphdr.code, | |
975 | NULL), | |
976 | caphdr.length); | |
977 | stream_set_getp(s, start + caphdr.length); | |
978 | } | |
718e3744 | 979 | } |
d62a17ae | 980 | return 0; |
718e3744 | 981 | } |
982 | ||
d62a17ae | 983 | static int bgp_auth_parse(struct peer *peer, size_t length) |
718e3744 | 984 | { |
d62a17ae | 985 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, |
986 | BGP_NOTIFY_OPEN_AUTH_FAILURE); | |
987 | return -1; | |
718e3744 | 988 | } |
989 | ||
d62a17ae | 990 | static int strict_capability_same(struct peer *peer) |
718e3744 | 991 | { |
d62a17ae | 992 | int i, j; |
718e3744 | 993 | |
d62a17ae | 994 | for (i = AFI_IP; i < AFI_MAX; i++) |
995 | for (j = SAFI_UNICAST; j < SAFI_MAX; j++) | |
996 | if (peer->afc[i][j] != peer->afc_nego[i][j]) | |
997 | return 0; | |
998 | return 1; | |
718e3744 | 999 | } |
1000 | ||
0b2aa3a0 PJ |
1001 | /* peek into option, stores ASN to *as4 if the AS4 capability was found. |
1002 | * Returns 0 if no as4 found, as4cap value otherwise. | |
1003 | */ | |
d7c0a89a | 1004 | as_t peek_for_as4_capability(struct peer *peer, uint8_t length) |
0b2aa3a0 | 1005 | { |
d62a17ae | 1006 | struct stream *s = BGP_INPUT(peer); |
1007 | size_t orig_getp = stream_get_getp(s); | |
1008 | size_t end = orig_getp + length; | |
1009 | as_t as4 = 0; | |
1010 | ||
1011 | if (BGP_DEBUG(as4, AS4)) | |
1012 | zlog_info( | |
1013 | "%s [AS4] rcv OPEN w/ OPTION parameter len: %u," | |
1014 | " peeking for as4", | |
1015 | peer->host, length); | |
1016 | /* the error cases we DONT handle, we ONLY try to read as4 out of | |
1017 | * correctly formatted options. | |
1018 | */ | |
1019 | while (stream_get_getp(s) < end) { | |
d7c0a89a QY |
1020 | uint8_t opt_type; |
1021 | uint8_t opt_length; | |
d62a17ae | 1022 | |
1023 | /* Check the length. */ | |
1024 | if (stream_get_getp(s) + 2 > end) | |
1025 | goto end; | |
1026 | ||
1027 | /* Fetch option type and length. */ | |
1028 | opt_type = stream_getc(s); | |
1029 | opt_length = stream_getc(s); | |
1030 | ||
1031 | /* Option length check. */ | |
1032 | if (stream_get_getp(s) + opt_length > end) | |
1033 | goto end; | |
1034 | ||
1035 | if (opt_type == BGP_OPEN_OPT_CAP) { | |
1036 | unsigned long capd_start = stream_get_getp(s); | |
1037 | unsigned long capd_end = capd_start + opt_length; | |
1038 | ||
1039 | assert(capd_end <= end); | |
1040 | ||
1041 | while (stream_get_getp(s) < capd_end) { | |
1042 | struct capability_header hdr; | |
1043 | ||
1044 | if (stream_get_getp(s) + 2 > capd_end) | |
1045 | goto end; | |
1046 | ||
1047 | hdr.code = stream_getc(s); | |
1048 | hdr.length = stream_getc(s); | |
1049 | ||
1050 | if ((stream_get_getp(s) + hdr.length) | |
1051 | > capd_end) | |
1052 | goto end; | |
1053 | ||
1054 | if (hdr.code == CAPABILITY_CODE_AS4) { | |
1055 | if (BGP_DEBUG(as4, AS4)) | |
1056 | zlog_info( | |
1057 | "[AS4] found AS4 capability, about to parse"); | |
1058 | as4 = bgp_capability_as4(peer, &hdr); | |
1059 | ||
1060 | goto end; | |
1061 | } | |
1062 | stream_forward_getp(s, hdr.length); | |
1063 | } | |
1064 | } | |
0b2aa3a0 | 1065 | } |
0b2aa3a0 PJ |
1066 | |
1067 | end: | |
d62a17ae | 1068 | stream_set_getp(s, orig_getp); |
1069 | return as4; | |
0b2aa3a0 PJ |
1070 | } |
1071 | ||
3b381c32 AS |
1072 | /** |
1073 | * Parse open option. | |
1074 | * | |
1075 | * @param[out] mp_capability @see bgp_capability_parse() for semantics. | |
1076 | */ | |
d7c0a89a | 1077 | int bgp_open_option_parse(struct peer *peer, uint8_t length, int *mp_capability) |
718e3744 | 1078 | { |
d62a17ae | 1079 | int ret = 0; |
d7c0a89a QY |
1080 | uint8_t *error; |
1081 | uint8_t error_data[BGP_MAX_PACKET_SIZE]; | |
d62a17ae | 1082 | struct stream *s = BGP_INPUT(peer); |
1083 | size_t end = stream_get_getp(s) + length; | |
1084 | ||
1085 | error = error_data; | |
1086 | ||
1087 | if (bgp_debug_neighbor_events(peer)) | |
1088 | zlog_debug("%s rcv OPEN w/ OPTION parameter len: %u", | |
1089 | peer->host, length); | |
1090 | ||
1091 | while (stream_get_getp(s) < end) { | |
d7c0a89a QY |
1092 | uint8_t opt_type; |
1093 | uint8_t opt_length; | |
d62a17ae | 1094 | |
1095 | /* Must have at least an OPEN option header */ | |
1096 | if (STREAM_READABLE(s) < 2) { | |
1097 | zlog_info("%s Option length error", peer->host); | |
1098 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1099 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1100 | return -1; | |
1101 | } | |
1102 | ||
1103 | /* Fetch option type and length. */ | |
1104 | opt_type = stream_getc(s); | |
1105 | opt_length = stream_getc(s); | |
1106 | ||
1107 | /* Option length check. */ | |
1108 | if (STREAM_READABLE(s) < opt_length) { | |
1109 | zlog_info("%s Option length error", peer->host); | |
1110 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1111 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); | |
1112 | return -1; | |
1113 | } | |
1114 | ||
1115 | if (bgp_debug_neighbor_events(peer)) | |
1116 | zlog_debug( | |
1117 | "%s rcvd OPEN w/ optional parameter type %u (%s) len %u", | |
1118 | peer->host, opt_type, | |
1119 | opt_type == BGP_OPEN_OPT_AUTH | |
1120 | ? "Authentication" | |
1121 | : opt_type == BGP_OPEN_OPT_CAP | |
1122 | ? "Capability" | |
1123 | : "Unknown", | |
1124 | opt_length); | |
1125 | ||
1126 | switch (opt_type) { | |
1127 | case BGP_OPEN_OPT_AUTH: | |
1128 | ret = bgp_auth_parse(peer, opt_length); | |
1129 | break; | |
1130 | case BGP_OPEN_OPT_CAP: | |
1131 | ret = bgp_capability_parse(peer, opt_length, | |
1132 | mp_capability, &error); | |
1133 | break; | |
1134 | default: | |
1135 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1136 | BGP_NOTIFY_OPEN_UNSUP_PARAM); | |
1137 | ret = -1; | |
1138 | break; | |
1139 | } | |
1140 | ||
1141 | /* Parse error. To accumulate all unsupported capability codes, | |
1142 | bgp_capability_parse does not return -1 when encounter | |
1143 | unsupported capability code. To detect that, please check | |
1144 | error and erro_data pointer, like below. */ | |
1145 | if (ret < 0) | |
1146 | return -1; | |
718e3744 | 1147 | } |
1148 | ||
d62a17ae | 1149 | /* All OPEN option is parsed. Check capability when strict compare |
1150 | flag is enabled.*/ | |
1151 | if (CHECK_FLAG(peer->flags, PEER_FLAG_STRICT_CAP_MATCH)) { | |
1152 | /* If Unsupported Capability exists. */ | |
1153 | if (error != error_data) { | |
1154 | bgp_notify_send_with_data(peer, BGP_NOTIFY_OPEN_ERR, | |
1155 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1156 | error_data, | |
1157 | error - error_data); | |
1158 | return -1; | |
1159 | } | |
1160 | ||
1161 | /* Check local capability does not negotiated with remote | |
1162 | peer. */ | |
1163 | if (!strict_capability_same(peer)) { | |
1164 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1165 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1166 | return -1; | |
1167 | } | |
718e3744 | 1168 | } |
1169 | ||
d62a17ae | 1170 | /* Check there are no common AFI/SAFIs and send Unsupported Capability |
1171 | error. */ | |
1172 | if (*mp_capability | |
1173 | && !CHECK_FLAG(peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) { | |
1174 | if (!peer->afc_nego[AFI_IP][SAFI_UNICAST] | |
1175 | && !peer->afc_nego[AFI_IP][SAFI_MULTICAST] | |
1176 | && !peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST] | |
1177 | && !peer->afc_nego[AFI_IP][SAFI_MPLS_VPN] | |
1178 | && !peer->afc_nego[AFI_IP][SAFI_ENCAP] | |
7c40bf39 | 1179 | && !peer->afc_nego[AFI_IP][SAFI_FLOWSPEC] |
d62a17ae | 1180 | && !peer->afc_nego[AFI_IP6][SAFI_UNICAST] |
1181 | && !peer->afc_nego[AFI_IP6][SAFI_MULTICAST] | |
1182 | && !peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST] | |
1183 | && !peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN] | |
1184 | && !peer->afc_nego[AFI_IP6][SAFI_ENCAP] | |
7c40bf39 | 1185 | && !peer->afc_nego[AFI_IP6][SAFI_FLOWSPEC] |
d62a17ae | 1186 | && !peer->afc_nego[AFI_L2VPN][SAFI_EVPN]) { |
1187 | zlog_err( | |
1188 | "%s [Error] Configured AFI/SAFIs do not " | |
1189 | "overlap with received MP capabilities", | |
1190 | peer->host); | |
1191 | ||
1192 | if (error != error_data) | |
1193 | bgp_notify_send_with_data( | |
1194 | peer, BGP_NOTIFY_OPEN_ERR, | |
1195 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, error_data, | |
1196 | error - error_data); | |
1197 | else | |
1198 | bgp_notify_send(peer, BGP_NOTIFY_OPEN_ERR, | |
1199 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1200 | return -1; | |
1201 | } | |
718e3744 | 1202 | } |
d62a17ae | 1203 | return 0; |
718e3744 | 1204 | } |
1205 | ||
d62a17ae | 1206 | static void bgp_open_capability_orf(struct stream *s, struct peer *peer, |
d7c0a89a | 1207 | afi_t afi, safi_t safi, uint8_t code) |
718e3744 | 1208 | { |
d7c0a89a QY |
1209 | uint8_t cap_len; |
1210 | uint8_t orf_len; | |
d62a17ae | 1211 | unsigned long capp; |
1212 | unsigned long orfp; | |
1213 | unsigned long numberp; | |
1214 | int number_of_orfs = 0; | |
1215 | iana_afi_t pkt_afi; | |
5c525538 | 1216 | iana_safi_t pkt_safi; |
d62a17ae | 1217 | |
1218 | /* Convert AFI, SAFI to values for packet. */ | |
1219 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, &pkt_safi); | |
1220 | ||
1221 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1222 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1223 | stream_putc(s, 0); /* Capability Length */ | |
1224 | stream_putc(s, code); /* Capability Code */ | |
1225 | orfp = stream_get_endp(s); /* Set ORF Len Pointer */ | |
1226 | stream_putc(s, 0); /* ORF Length */ | |
1227 | stream_putw(s, pkt_afi); | |
1228 | stream_putc(s, 0); | |
1229 | stream_putc(s, pkt_safi); | |
1230 | numberp = stream_get_endp(s); /* Set Number Pointer */ | |
1231 | stream_putc(s, 0); /* Number of ORFs */ | |
1232 | ||
1233 | /* Address Prefix ORF */ | |
1234 | if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1235 | || CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) { | |
1236 | stream_putc(s, (code == CAPABILITY_CODE_ORF | |
1237 | ? ORF_TYPE_PREFIX | |
1238 | : ORF_TYPE_PREFIX_OLD)); | |
1239 | ||
1240 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1241 | PEER_FLAG_ORF_PREFIX_SM) | |
1242 | && CHECK_FLAG(peer->af_flags[afi][safi], | |
1243 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1244 | SET_FLAG(peer->af_cap[afi][safi], | |
1245 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1246 | SET_FLAG(peer->af_cap[afi][safi], | |
1247 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1248 | stream_putc(s, ORF_MODE_BOTH); | |
1249 | } else if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1250 | PEER_FLAG_ORF_PREFIX_SM)) { | |
1251 | SET_FLAG(peer->af_cap[afi][safi], | |
1252 | PEER_CAP_ORF_PREFIX_SM_ADV); | |
1253 | stream_putc(s, ORF_MODE_SEND); | |
1254 | } else { | |
1255 | SET_FLAG(peer->af_cap[afi][safi], | |
1256 | PEER_CAP_ORF_PREFIX_RM_ADV); | |
1257 | stream_putc(s, ORF_MODE_RECEIVE); | |
1258 | } | |
1259 | number_of_orfs++; | |
718e3744 | 1260 | } |
718e3744 | 1261 | |
d62a17ae | 1262 | /* Total Number of ORFs. */ |
1263 | stream_putc_at(s, numberp, number_of_orfs); | |
718e3744 | 1264 | |
d62a17ae | 1265 | /* Total ORF Len. */ |
1266 | orf_len = stream_get_endp(s) - orfp - 1; | |
1267 | stream_putc_at(s, orfp, orf_len); | |
718e3744 | 1268 | |
d62a17ae | 1269 | /* Total Capability Len. */ |
1270 | cap_len = stream_get_endp(s) - capp - 1; | |
1271 | stream_putc_at(s, capp, cap_len); | |
718e3744 | 1272 | } |
1273 | ||
1274 | /* Fill in capability open option to the packet. */ | |
d62a17ae | 1275 | void bgp_open_capability(struct stream *s, struct peer *peer) |
718e3744 | 1276 | { |
d7c0a89a | 1277 | uint8_t len; |
d62a17ae | 1278 | unsigned long cp, capp, rcapp; |
1279 | iana_afi_t pkt_afi; | |
1280 | afi_t afi; | |
5c525538 RW |
1281 | safi_t safi; |
1282 | iana_safi_t pkt_safi; | |
d62a17ae | 1283 | as_t local_as; |
d7c0a89a QY |
1284 | uint32_t restart_time; |
1285 | uint8_t afi_safi_count = 0; | |
d62a17ae | 1286 | int adv_addpath_tx = 0; |
1287 | ||
1288 | /* Remember current pointer for Opt Parm Len. */ | |
1289 | cp = stream_get_endp(s); | |
1290 | ||
1291 | /* Opt Parm Len. */ | |
1292 | stream_putc(s, 0); | |
1293 | ||
1294 | /* Do not send capability. */ | |
1295 | if (!CHECK_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN) | |
1296 | || CHECK_FLAG(peer->flags, PEER_FLAG_DONT_CAPABILITY)) | |
1297 | return; | |
1298 | ||
1299 | /* MP capability for configured AFI, SAFI */ | |
05c7a1cc QY |
1300 | FOREACH_AFI_SAFI (afi, safi) { |
1301 | if (peer->afc[afi][safi]) { | |
1302 | /* Convert AFI, SAFI to values for packet. */ | |
1303 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1304 | &pkt_safi); | |
1305 | ||
1306 | peer->afc_adv[afi][safi] = 1; | |
1307 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1308 | stream_putc(s, CAPABILITY_CODE_MP_LEN + 2); | |
1309 | stream_putc(s, CAPABILITY_CODE_MP); | |
1310 | stream_putc(s, CAPABILITY_CODE_MP_LEN); | |
1311 | stream_putw(s, pkt_afi); | |
1312 | stream_putc(s, 0); | |
1313 | stream_putc(s, pkt_safi); | |
1314 | ||
1315 | /* Extended nexthop capability - currently | |
1316 | * supporting RFC-5549 for | |
1317 | * Link-Local peering only | |
1318 | */ | |
1319 | if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE) | |
1320 | && peer->su.sa.sa_family == AF_INET6 | |
1321 | && IN6_IS_ADDR_LINKLOCAL(&peer->su.sin6.sin6_addr) | |
1322 | && afi == AFI_IP | |
1323 | && (safi == SAFI_UNICAST | |
1324 | || safi == SAFI_LABELED_UNICAST)) { | |
1325 | /* RFC 5549 Extended Next Hop Encoding | |
1326 | */ | |
1327 | SET_FLAG(peer->cap, PEER_CAP_ENHE_ADV); | |
d62a17ae | 1328 | stream_putc(s, BGP_OPEN_OPT_CAP); |
05c7a1cc QY |
1329 | stream_putc(s, CAPABILITY_CODE_ENHE_LEN + 2); |
1330 | stream_putc(s, CAPABILITY_CODE_ENHE); | |
1331 | stream_putc(s, CAPABILITY_CODE_ENHE_LEN); | |
1332 | ||
1333 | SET_FLAG(peer->af_cap[AFI_IP][safi], | |
1334 | PEER_CAP_ENHE_AF_ADV); | |
d62a17ae | 1335 | stream_putw(s, pkt_afi); |
05c7a1cc QY |
1336 | stream_putw(s, pkt_safi); |
1337 | stream_putw(s, afi_int2iana(AFI_IP6)); | |
d62a17ae | 1338 | |
05c7a1cc QY |
1339 | if (CHECK_FLAG(peer->af_cap[afi][safi], |
1340 | PEER_CAP_ENHE_AF_RCV)) | |
1341 | SET_FLAG(peer->af_cap[afi][safi], | |
1342 | PEER_CAP_ENHE_AF_NEGO); | |
d62a17ae | 1343 | } |
1344 | } | |
05c7a1cc | 1345 | } |
d62a17ae | 1346 | |
1347 | /* Route refresh. */ | |
1348 | SET_FLAG(peer->cap, PEER_CAP_REFRESH_ADV); | |
1349 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1350 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1351 | stream_putc(s, CAPABILITY_CODE_REFRESH_OLD); | |
1352 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1353 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1354 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1355 | stream_putc(s, CAPABILITY_CODE_REFRESH); | |
1356 | stream_putc(s, CAPABILITY_CODE_REFRESH_LEN); | |
1357 | ||
1358 | /* AS4 */ | |
1359 | SET_FLAG(peer->cap, PEER_CAP_AS4_ADV); | |
1360 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1361 | stream_putc(s, CAPABILITY_CODE_AS4_LEN + 2); | |
1362 | stream_putc(s, CAPABILITY_CODE_AS4); | |
1363 | stream_putc(s, CAPABILITY_CODE_AS4_LEN); | |
1364 | if (peer->change_local_as) | |
1365 | local_as = peer->change_local_as; | |
1366 | else | |
1367 | local_as = peer->local_as; | |
1368 | stream_putl(s, local_as); | |
1369 | ||
1370 | /* AddPath */ | |
05c7a1cc QY |
1371 | FOREACH_AFI_SAFI (afi, safi) { |
1372 | if (peer->afc[afi][safi]) { | |
1373 | afi_safi_count++; | |
1374 | ||
1375 | /* Only advertise addpath TX if a feature that | |
1376 | * will use it is | |
1377 | * configured */ | |
1378 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1379 | PEER_FLAG_ADDPATH_TX_ALL_PATHS) | |
1380 | || CHECK_FLAG(peer->af_flags[afi][safi], | |
1381 | PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) | |
1382 | adv_addpath_tx = 1; | |
1383 | } | |
1384 | } | |
d62a17ae | 1385 | |
1386 | SET_FLAG(peer->cap, PEER_CAP_ADDPATH_ADV); | |
1387 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1388 | stream_putc(s, (CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count) + 2); | |
1389 | stream_putc(s, CAPABILITY_CODE_ADDPATH); | |
1390 | stream_putc(s, CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count); | |
1391 | ||
05c7a1cc QY |
1392 | FOREACH_AFI_SAFI (afi, safi) { |
1393 | if (peer->afc[afi][safi]) { | |
1394 | /* Convert AFI, SAFI to values for packet. */ | |
1395 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1396 | &pkt_safi); | |
d62a17ae | 1397 | |
05c7a1cc QY |
1398 | stream_putw(s, pkt_afi); |
1399 | stream_putc(s, pkt_safi); | |
d62a17ae | 1400 | |
05c7a1cc QY |
1401 | if (adv_addpath_tx) { |
1402 | stream_putc(s, BGP_ADDPATH_RX | BGP_ADDPATH_TX); | |
1403 | SET_FLAG(peer->af_cap[afi][safi], | |
1404 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1405 | SET_FLAG(peer->af_cap[afi][safi], | |
1406 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
1407 | } else { | |
1408 | stream_putc(s, BGP_ADDPATH_RX); | |
1409 | SET_FLAG(peer->af_cap[afi][safi], | |
1410 | PEER_CAP_ADDPATH_AF_RX_ADV); | |
1411 | UNSET_FLAG(peer->af_cap[afi][safi], | |
1412 | PEER_CAP_ADDPATH_AF_TX_ADV); | |
d62a17ae | 1413 | } |
05c7a1cc QY |
1414 | } |
1415 | } | |
d62a17ae | 1416 | |
1417 | /* ORF capability. */ | |
05c7a1cc QY |
1418 | FOREACH_AFI_SAFI (afi, safi) { |
1419 | if (CHECK_FLAG(peer->af_flags[afi][safi], | |
1420 | PEER_FLAG_ORF_PREFIX_SM) | |
1421 | || CHECK_FLAG(peer->af_flags[afi][safi], | |
1422 | PEER_FLAG_ORF_PREFIX_RM)) { | |
1423 | bgp_open_capability_orf(s, peer, afi, safi, | |
1424 | CAPABILITY_CODE_ORF_OLD); | |
1425 | bgp_open_capability_orf(s, peer, afi, safi, | |
1426 | CAPABILITY_CODE_ORF); | |
1427 | } | |
1428 | } | |
d62a17ae | 1429 | |
1430 | /* Dynamic capability. */ | |
1431 | if (CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY)) { | |
1432 | SET_FLAG(peer->cap, PEER_CAP_DYNAMIC_ADV); | |
1433 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1434 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1435 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_OLD); | |
1436 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1437 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1438 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
1439 | stream_putc(s, CAPABILITY_CODE_DYNAMIC); | |
1440 | stream_putc(s, CAPABILITY_CODE_DYNAMIC_LEN); | |
718e3744 | 1441 | } |
1442 | ||
d62a17ae | 1443 | /* Hostname capability */ |
6b3ee3a0 | 1444 | if (cmd_hostname_get()) { |
d62a17ae | 1445 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_ADV); |
1446 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1447 | rcapp = stream_get_endp(s); /* Ptr to length placeholder */ | |
1448 | stream_putc(s, 0); /* dummy len for now */ | |
1449 | stream_putc(s, CAPABILITY_CODE_FQDN); | |
1450 | capp = stream_get_endp(s); | |
1451 | stream_putc(s, 0); /* dummy len for now */ | |
6b3ee3a0 | 1452 | len = strlen(cmd_hostname_get()); |
d62a17ae | 1453 | if (len > BGP_MAX_HOSTNAME) |
1454 | len = BGP_MAX_HOSTNAME; | |
1455 | ||
1456 | stream_putc(s, len); | |
6b3ee3a0 MK |
1457 | stream_put(s, cmd_hostname_get(), len); |
1458 | if (cmd_domainname_get()) { | |
1459 | len = strlen(cmd_domainname_get()); | |
d62a17ae | 1460 | if (len > BGP_MAX_HOSTNAME) |
1461 | len = BGP_MAX_HOSTNAME; | |
1462 | ||
1463 | stream_putc(s, len); | |
6b3ee3a0 | 1464 | stream_put(s, cmd_domainname_get(), len); |
d62a17ae | 1465 | } else |
d62a17ae | 1466 | stream_putc(s, 0); /* 0 length */ |
04b6bdc0 | 1467 | |
d62a17ae | 1468 | /* Set the lengths straight */ |
1469 | len = stream_get_endp(s) - rcapp - 1; | |
1470 | stream_putc_at(s, rcapp, len); | |
1471 | len = stream_get_endp(s) - capp - 1; | |
1472 | stream_putc_at(s, capp, len); | |
04b6bdc0 | 1473 | |
d62a17ae | 1474 | if (bgp_debug_neighbor_events(peer)) |
d62a17ae | 1475 | zlog_debug( |
1476 | "%s Sending hostname cap with hn = %s, dn = %s", | |
6b3ee3a0 MK |
1477 | peer->host, cmd_hostname_get(), |
1478 | cmd_domainname_get()); | |
d62a17ae | 1479 | } |
1480 | ||
1481 | /* Sending base graceful-restart capability irrespective of the config | |
1482 | */ | |
1483 | SET_FLAG(peer->cap, PEER_CAP_RESTART_ADV); | |
1484 | stream_putc(s, BGP_OPEN_OPT_CAP); | |
1485 | capp = stream_get_endp(s); /* Set Capability Len Pointer */ | |
1486 | stream_putc(s, 0); /* Capability Length */ | |
1487 | stream_putc(s, CAPABILITY_CODE_RESTART); | |
1488 | rcapp = stream_get_endp(s); /* Set Restart Capability Len Pointer */ | |
1489 | stream_putc(s, 0); | |
1490 | restart_time = peer->bgp->restart_time; | |
1491 | if (peer->bgp->t_startup) { | |
1492 | SET_FLAG(restart_time, RESTART_R_BIT); | |
1493 | SET_FLAG(peer->cap, PEER_CAP_RESTART_BIT_ADV); | |
1494 | } | |
1495 | stream_putw(s, restart_time); | |
1496 | ||
1497 | /* Send address-family specific graceful-restart capability only when GR | |
1498 | config | |
1499 | is present */ | |
1500 | if (bgp_flag_check(peer->bgp, BGP_FLAG_GRACEFUL_RESTART)) { | |
05c7a1cc QY |
1501 | FOREACH_AFI_SAFI (afi, safi) { |
1502 | if (peer->afc[afi][safi]) { | |
1503 | /* Convert AFI, SAFI to values for | |
1504 | * packet. */ | |
1505 | bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, | |
1506 | &pkt_safi); | |
1507 | stream_putw(s, pkt_afi); | |
1508 | stream_putc(s, pkt_safi); | |
1509 | if (bgp_flag_check(peer->bgp, | |
1510 | BGP_FLAG_GR_PRESERVE_FWD)) | |
1511 | stream_putc(s, RESTART_F_BIT); | |
1512 | else | |
1513 | stream_putc(s, 0); | |
1514 | } | |
1515 | } | |
d62a17ae | 1516 | } |
1517 | ||
1518 | /* Total Graceful restart capability Len. */ | |
1519 | len = stream_get_endp(s) - rcapp - 1; | |
1520 | stream_putc_at(s, rcapp, len); | |
1521 | ||
1522 | /* Total Capability Len. */ | |
1523 | len = stream_get_endp(s) - capp - 1; | |
1524 | stream_putc_at(s, capp, len); | |
1525 | ||
1526 | /* Total Opt Parm Len. */ | |
1527 | len = stream_get_endp(s) - cp - 1; | |
1528 | stream_putc_at(s, cp, len); | |
718e3744 | 1529 | } |