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Commit | Line | Data |
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718e3744 | 1 | /* BGP open message handling |
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 | |
17 | along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
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" |
718e3744 | 31 | |
856ca177 | 32 | #include "lib/json.h" |
718e3744 | 33 | #include "bgpd/bgpd.h" |
34 | #include "bgpd/bgp_attr.h" | |
35 | #include "bgpd/bgp_debug.h" | |
36 | #include "bgpd/bgp_fsm.h" | |
37 | #include "bgpd/bgp_packet.h" | |
38 | #include "bgpd/bgp_open.h" | |
0b2aa3a0 | 39 | #include "bgpd/bgp_aspath.h" |
538621f2 | 40 | #include "bgpd/bgp_vty.h" |
41 | ||
718e3744 | 42 | /* BGP-4 Multiprotocol Extentions lead us to the complex world. We can |
43 | negotiate remote peer supports extentions or not. But if | |
44 | remote-peer doesn't supports negotiation process itself. We would | |
45 | like to do manual configuration. | |
46 | ||
47 | So there is many configurable point. First of all we want set each | |
48 | peer whether we send capability negotiation to the peer or not. | |
49 | Next, if we send capability to the peer we want to set my capabilty | |
50 | inforation at each peer. */ | |
51 | ||
52 | void | |
856ca177 | 53 | bgp_capability_vty_out (struct vty *vty, struct peer *peer, u_char use_json, json_object *json_neigh) |
718e3744 | 54 | { |
5228ad27 | 55 | char *pnt; |
56 | char *end; | |
6d58272b PJ |
57 | struct capability_mp_data mpc; |
58 | struct capability_header *hdr; | |
856ca177 MS |
59 | json_object *json_cap = NULL; |
60 | ||
61 | if (use_json) | |
62 | json_cap = json_object_new_object(); | |
718e3744 | 63 | |
64 | pnt = peer->notify.data; | |
65 | end = pnt + peer->notify.length; | |
6d58272b | 66 | |
718e3744 | 67 | while (pnt < end) |
68 | { | |
6d58272b | 69 | if (pnt + sizeof (struct capability_mp_data) + 2 > end) |
718e3744 | 70 | return; |
6d58272b PJ |
71 | |
72 | hdr = (struct capability_header *)pnt; | |
73 | if (pnt + hdr->length + 2 > end) | |
718e3744 | 74 | return; |
75 | ||
6d58272b PJ |
76 | memcpy (&mpc, pnt + 2, sizeof(struct capability_mp_data)); |
77 | ||
78 | if (hdr->code == CAPABILITY_CODE_MP) | |
718e3744 | 79 | { |
856ca177 MS |
80 | if (use_json) |
81 | { | |
82 | switch (ntohs (mpc.afi)) | |
83 | { | |
84 | case AFI_IP: | |
85 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolAfi", "IPv4"); | |
86 | break; | |
87 | case AFI_IP6: | |
88 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolAfi", "IPv6"); | |
89 | break; | |
90 | default: | |
91 | json_object_int_add(json_cap, "capabilityErrorMultiProtocolAfiUnknown", ntohs (mpc.afi)); | |
92 | break; | |
93 | } | |
94 | switch (mpc.safi) | |
95 | { | |
96 | case SAFI_UNICAST: | |
97 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "unicast"); | |
98 | break; | |
99 | case SAFI_MULTICAST: | |
100 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "multicast"); | |
101 | break; | |
102 | case SAFI_MPLS_LABELED_VPN: | |
103 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "MPLS-labeled VPN"); | |
104 | break; | |
105 | default: | |
106 | json_object_int_add(json_cap, "capabilityErrorMultiProtocolSafiUnknown", mpc.safi); | |
107 | break; | |
108 | } | |
109 | } | |
110 | else | |
111 | { | |
112 | vty_out (vty, " Capability error for: Multi protocol "); | |
113 | switch (ntohs (mpc.afi)) | |
114 | { | |
115 | case AFI_IP: | |
116 | vty_out (vty, "AFI IPv4, "); | |
117 | break; | |
118 | case AFI_IP6: | |
119 | vty_out (vty, "AFI IPv6, "); | |
120 | break; | |
121 | default: | |
122 | vty_out (vty, "AFI Unknown %d, ", ntohs (mpc.afi)); | |
123 | break; | |
124 | } | |
125 | switch (mpc.safi) | |
126 | { | |
127 | case SAFI_UNICAST: | |
128 | vty_out (vty, "SAFI Unicast"); | |
129 | break; | |
130 | case SAFI_MULTICAST: | |
131 | vty_out (vty, "SAFI Multicast"); | |
132 | break; | |
133 | case SAFI_MPLS_LABELED_VPN: | |
134 | vty_out (vty, "SAFI MPLS-labeled VPN"); | |
135 | break; | |
136 | default: | |
137 | vty_out (vty, "SAFI Unknown %d ", mpc.safi); | |
138 | break; | |
139 | } | |
140 | vty_out (vty, "%s", VTY_NEWLINE); | |
141 | } | |
142 | } | |
6d58272b | 143 | else if (hdr->code >= 128) |
856ca177 MS |
144 | { |
145 | if (use_json) | |
146 | json_object_int_add(json_cap, "capabilityErrorVendorSpecificCapabilityCode", hdr->code); | |
147 | else | |
148 | vty_out (vty, " Capability error: vendor specific capability code %d", | |
149 | hdr->code); | |
150 | } | |
718e3744 | 151 | else |
856ca177 MS |
152 | { |
153 | if (use_json) | |
154 | json_object_int_add(json_cap, "capabilityErrorUnknownCapabilityCode", hdr->code); | |
155 | else | |
156 | vty_out (vty, " Capability error: unknown capability code %d", | |
157 | hdr->code); | |
158 | } | |
6d58272b | 159 | pnt += hdr->length + 2; |
718e3744 | 160 | } |
856ca177 MS |
161 | if (use_json) |
162 | json_object_object_add(json_neigh, "capabilityErrors", json_cap); | |
718e3744 | 163 | } |
164 | ||
6d58272b PJ |
165 | static void |
166 | bgp_capability_mp_data (struct stream *s, struct capability_mp_data *mpc) | |
718e3744 | 167 | { |
6d58272b PJ |
168 | mpc->afi = stream_getw (s); |
169 | mpc->reserved = stream_getc (s); | |
170 | mpc->safi = stream_getc (s); | |
171 | } | |
718e3744 | 172 | |
6d58272b PJ |
173 | int |
174 | bgp_afi_safi_valid_indices (afi_t afi, safi_t *safi) | |
175 | { | |
6d58272b | 176 | switch (afi) |
718e3744 | 177 | { |
6d58272b PJ |
178 | case AFI_IP: |
179 | #ifdef HAVE_IPV6 | |
180 | case AFI_IP6: | |
181 | #endif | |
182 | switch (*safi) | |
183 | { | |
42e6d745 DO |
184 | /* BGP MPLS-labeled VPN SAFI isn't contigious with others, remap */ |
185 | case SAFI_MPLS_LABELED_VPN: | |
6d58272b PJ |
186 | *safi = SAFI_MPLS_VPN; |
187 | case SAFI_UNICAST: | |
188 | case SAFI_MULTICAST: | |
189 | case SAFI_MPLS_VPN: | |
190 | return 1; | |
191 | } | |
718e3744 | 192 | } |
6d58272b PJ |
193 | zlog_debug ("unknown afi/safi (%u/%u)", afi, *safi); |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | /* Set negotiated capability value. */ | |
199 | static int | |
200 | bgp_capability_mp (struct peer *peer, struct capability_header *hdr) | |
201 | { | |
202 | struct capability_mp_data mpc; | |
203 | struct stream *s = BGP_INPUT (peer); | |
204 | ||
14051b36 DS |
205 | /* Verify length is 4 */ |
206 | if (hdr->length != 4) | |
207 | { | |
208 | zlog_warn("MP Cap: Received invalid length %d, non-multiple of 4", | |
209 | hdr->length); | |
210 | return -1; | |
211 | } | |
212 | ||
6d58272b PJ |
213 | bgp_capability_mp_data (s, &mpc); |
214 | ||
167d390a | 215 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
216 | zlog_debug ("%s OPEN has MP_EXT CAP for afi/safi: %u/%u", |
217 | peer->host, mpc.afi, mpc.safi); | |
218 | ||
219 | if (!bgp_afi_safi_valid_indices (mpc.afi, &mpc.safi)) | |
220 | return -1; | |
221 | ||
222 | /* Now safi remapped, and afi/safi are valid array indices */ | |
223 | peer->afc_recv[mpc.afi][mpc.safi] = 1; | |
224 | ||
225 | if (peer->afc[mpc.afi][mpc.safi]) | |
e08286bc | 226 | peer->afc_nego[mpc.afi][mpc.safi] = 1; |
6d58272b PJ |
227 | else |
228 | return -1; | |
718e3744 | 229 | |
230 | return 0; | |
231 | } | |
232 | ||
94f2b392 | 233 | static void |
718e3744 | 234 | bgp_capability_orf_not_support (struct peer *peer, afi_t afi, safi_t safi, |
235 | u_char type, u_char mode) | |
236 | { | |
16286195 | 237 | if (bgp_debug_neighbor_events(peer)) |
8325cd7f | 238 | zlog_debug ("%s Addr-family %d/%d has ORF type/mode %d/%d not supported", |
718e3744 | 239 | peer->host, afi, safi, type, mode); |
240 | } | |
241 | ||
8f5abac1 | 242 | static const struct message orf_type_str[] = |
6d58272b PJ |
243 | { |
244 | { ORF_TYPE_PREFIX, "Prefixlist" }, | |
245 | { ORF_TYPE_PREFIX_OLD, "Prefixlist (old)" }, | |
246 | }; | |
837d16cc | 247 | static const int orf_type_str_max = array_size(orf_type_str); |
6d58272b | 248 | |
8f5abac1 | 249 | static const struct message orf_mode_str[] = |
6d58272b PJ |
250 | { |
251 | { ORF_MODE_RECEIVE, "Receive" }, | |
252 | { ORF_MODE_SEND, "Send" }, | |
253 | { ORF_MODE_BOTH, "Both" }, | |
254 | }; | |
837d16cc | 255 | static const int orf_mode_str_max = array_size(orf_mode_str); |
6d58272b | 256 | |
94f2b392 | 257 | static int |
6d58272b | 258 | bgp_capability_orf_entry (struct peer *peer, struct capability_header *hdr) |
718e3744 | 259 | { |
6d58272b PJ |
260 | struct stream *s = BGP_INPUT (peer); |
261 | struct capability_orf_entry entry; | |
262 | afi_t afi; | |
263 | safi_t safi; | |
718e3744 | 264 | u_char type; |
265 | u_char mode; | |
266 | u_int16_t sm_cap = 0; /* capability send-mode receive */ | |
267 | u_int16_t rm_cap = 0; /* capability receive-mode receive */ | |
268 | int i; | |
269 | ||
6d58272b PJ |
270 | /* ORF Entry header */ |
271 | bgp_capability_mp_data (s, &entry.mpc); | |
272 | entry.num = stream_getc (s); | |
273 | afi = entry.mpc.afi; | |
274 | safi = entry.mpc.safi; | |
275 | ||
16286195 | 276 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
277 | zlog_debug ("%s ORF Cap entry for afi/safi: %u/%u", |
278 | peer->host, entry.mpc.afi, entry.mpc.safi); | |
718e3744 | 279 | |
280 | /* Check AFI and SAFI. */ | |
6d58272b PJ |
281 | if (!bgp_afi_safi_valid_indices (entry.mpc.afi, &safi)) |
282 | { | |
283 | zlog_info ("%s Addr-family %d/%d not supported." | |
284 | " Ignoring the ORF capability", | |
285 | peer->host, entry.mpc.afi, entry.mpc.safi); | |
286 | return 0; | |
287 | } | |
288 | ||
289 | /* validate number field */ | |
5e728e92 | 290 | if (sizeof (struct capability_orf_entry) + (entry.num * 2) > hdr->length) |
718e3744 | 291 | { |
6d58272b PJ |
292 | zlog_info ("%s ORF Capability entry length error," |
293 | " Cap length %u, num %u", | |
294 | peer->host, hdr->length, entry.num); | |
09825025 | 295 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 296 | return -1; |
297 | } | |
298 | ||
6d58272b | 299 | for (i = 0 ; i < entry.num ; i++) |
718e3744 | 300 | { |
6d58272b PJ |
301 | type = stream_getc(s); |
302 | mode = stream_getc(s); | |
303 | ||
718e3744 | 304 | /* ORF Mode error check */ |
6d58272b PJ |
305 | switch (mode) |
306 | { | |
307 | case ORF_MODE_BOTH: | |
308 | case ORF_MODE_SEND: | |
309 | case ORF_MODE_RECEIVE: | |
310 | break; | |
311 | default: | |
312 | bgp_capability_orf_not_support (peer, afi, safi, type, mode); | |
313 | continue; | |
718e3744 | 314 | } |
6d58272b PJ |
315 | /* ORF Type and afi/safi error checks */ |
316 | /* capcode versus type */ | |
317 | switch (hdr->code) | |
318 | { | |
319 | case CAPABILITY_CODE_ORF: | |
320 | switch (type) | |
321 | { | |
322 | case ORF_TYPE_PREFIX: | |
323 | break; | |
324 | default: | |
325 | bgp_capability_orf_not_support (peer, afi, safi, type, mode); | |
326 | continue; | |
327 | } | |
328 | break; | |
329 | case CAPABILITY_CODE_ORF_OLD: | |
330 | switch (type) | |
331 | { | |
332 | case ORF_TYPE_PREFIX_OLD: | |
333 | break; | |
334 | default: | |
335 | bgp_capability_orf_not_support (peer, afi, safi, type, mode); | |
336 | continue; | |
337 | } | |
338 | break; | |
339 | default: | |
340 | bgp_capability_orf_not_support (peer, afi, safi, type, mode); | |
341 | continue; | |
342 | } | |
343 | ||
344 | /* AFI vs SAFI */ | |
345 | if (!((afi == AFI_IP && safi == SAFI_UNICAST) | |
346 | || (afi == AFI_IP && safi == SAFI_MULTICAST) | |
347 | || (afi == AFI_IP6 && safi == SAFI_UNICAST))) | |
348 | { | |
349 | bgp_capability_orf_not_support (peer, afi, safi, type, mode); | |
350 | continue; | |
351 | } | |
352 | ||
16286195 | 353 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
354 | zlog_debug ("%s OPEN has %s ORF capability" |
355 | " as %s for afi/safi: %d/%d", | |
356 | peer->host, LOOKUP (orf_type_str, type), | |
357 | LOOKUP (orf_mode_str, mode), | |
358 | entry.mpc.afi, safi); | |
718e3744 | 359 | |
6d58272b | 360 | if (hdr->code == CAPABILITY_CODE_ORF) |
718e3744 | 361 | { |
6d58272b PJ |
362 | sm_cap = PEER_CAP_ORF_PREFIX_SM_RCV; |
363 | rm_cap = PEER_CAP_ORF_PREFIX_RM_RCV; | |
718e3744 | 364 | } |
6d58272b | 365 | else if (hdr->code == CAPABILITY_CODE_ORF_OLD) |
718e3744 | 366 | { |
6d58272b PJ |
367 | sm_cap = PEER_CAP_ORF_PREFIX_SM_OLD_RCV; |
368 | rm_cap = PEER_CAP_ORF_PREFIX_RM_OLD_RCV; | |
718e3744 | 369 | } |
370 | else | |
371 | { | |
372 | bgp_capability_orf_not_support (peer, afi, safi, type, mode); | |
373 | continue; | |
374 | } | |
375 | ||
376 | switch (mode) | |
377 | { | |
378 | case ORF_MODE_BOTH: | |
379 | SET_FLAG (peer->af_cap[afi][safi], sm_cap); | |
380 | SET_FLAG (peer->af_cap[afi][safi], rm_cap); | |
381 | break; | |
382 | case ORF_MODE_SEND: | |
383 | SET_FLAG (peer->af_cap[afi][safi], sm_cap); | |
384 | break; | |
385 | case ORF_MODE_RECEIVE: | |
386 | SET_FLAG (peer->af_cap[afi][safi], rm_cap); | |
387 | break; | |
388 | } | |
389 | } | |
390 | return 0; | |
391 | } | |
392 | ||
6d58272b PJ |
393 | static int |
394 | bgp_capability_restart (struct peer *peer, struct capability_header *caphdr) | |
395 | { | |
396 | struct stream *s = BGP_INPUT (peer); | |
397 | u_int16_t restart_flag_time; | |
6d58272b PJ |
398 | size_t end = stream_get_getp (s) + caphdr->length; |
399 | ||
14051b36 DS |
400 | /* Verify length is a multiple of 4 */ |
401 | if ((caphdr->length-2) % 4) | |
402 | { | |
403 | zlog_warn("Restart Cap: Received invalid length %d, non-multiple of 4", | |
404 | caphdr->length); | |
405 | return -1; | |
406 | } | |
407 | ||
6d58272b PJ |
408 | SET_FLAG (peer->cap, PEER_CAP_RESTART_RCV); |
409 | restart_flag_time = stream_getw(s); | |
410 | if (CHECK_FLAG (restart_flag_time, RESTART_R_BIT)) | |
4b52acf9 PJ |
411 | SET_FLAG (peer->cap, PEER_CAP_RESTART_BIT_RCV); |
412 | ||
6d58272b PJ |
413 | UNSET_FLAG (restart_flag_time, 0xF000); |
414 | peer->v_gr_restart = restart_flag_time; | |
718e3744 | 415 | |
16286195 | 416 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
417 | { |
418 | zlog_debug ("%s OPEN has Graceful Restart capability", peer->host); | |
419 | zlog_debug ("%s Peer has%srestarted. Restart Time : %d", | |
4b52acf9 PJ |
420 | peer->host, |
421 | CHECK_FLAG (peer->cap, PEER_CAP_RESTART_BIT_RCV) ? " " | |
422 | : " not ", | |
6d58272b PJ |
423 | peer->v_gr_restart); |
424 | } | |
718e3744 | 425 | |
21cc7694 | 426 | while (stream_get_getp (s) + 4 <= end) |
6d58272b PJ |
427 | { |
428 | afi_t afi = stream_getw (s); | |
429 | safi_t safi = stream_getc (s); | |
430 | u_char flag = stream_getc (s); | |
431 | ||
432 | if (!bgp_afi_safi_valid_indices (afi, &safi)) | |
433 | { | |
16286195 | 434 | if (bgp_debug_neighbor_events(peer)) |
6d58272b | 435 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not supported." |
14051b36 | 436 | " Ignore the Graceful Restart capability for this AFI/SAFI", |
6d58272b PJ |
437 | peer->host, afi, safi); |
438 | } | |
439 | else if (!peer->afc[afi][safi]) | |
440 | { | |
16286195 | 441 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
442 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not enabled." |
443 | " Ignore the Graceful Restart capability", | |
444 | peer->host, afi, safi); | |
445 | } | |
446 | else | |
447 | { | |
16286195 | 448 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
449 | zlog_debug ("%s Address family %s is%spreserved", peer->host, |
450 | afi_safi_print (afi, safi), | |
451 | CHECK_FLAG (peer->af_cap[afi][safi], | |
452 | PEER_CAP_RESTART_AF_PRESERVE_RCV) | |
453 | ? " " : " not "); | |
454 | ||
455 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_RESTART_AF_RCV); | |
456 | if (CHECK_FLAG (flag, RESTART_F_BIT)) | |
457 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_RESTART_AF_PRESERVE_RCV); | |
458 | ||
459 | } | |
460 | } | |
461 | return 0; | |
462 | } | |
718e3744 | 463 | |
14051b36 | 464 | /* Unlike other capability parsing routines, this one returns 0 on error */ |
0b2aa3a0 PJ |
465 | static as_t |
466 | bgp_capability_as4 (struct peer *peer, struct capability_header *hdr) | |
467 | { | |
5861739f PJ |
468 | SET_FLAG (peer->cap, PEER_CAP_AS4_RCV); |
469 | ||
470 | if (hdr->length != CAPABILITY_CODE_AS4_LEN) | |
471 | { | |
472 | zlog_err ("%s AS4 capability has incorrect data length %d", | |
473 | peer->host, hdr->length); | |
474 | return 0; | |
475 | } | |
476 | ||
0b2aa3a0 PJ |
477 | as_t as4 = stream_getl (BGP_INPUT(peer)); |
478 | ||
479 | if (BGP_DEBUG (as4, AS4)) | |
480 | zlog_debug ("%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u", | |
481 | peer->host, as4); | |
0b2aa3a0 PJ |
482 | return as4; |
483 | } | |
484 | ||
a82478b9 DS |
485 | static int |
486 | bgp_capability_addpath (struct peer *peer, struct capability_header *hdr) | |
487 | { | |
488 | struct stream *s = BGP_INPUT (peer); | |
489 | size_t end = stream_get_getp (s) + hdr->length; | |
490 | ||
491 | SET_FLAG (peer->cap, PEER_CAP_ADDPATH_RCV); | |
492 | ||
14051b36 DS |
493 | /* Verify length is a multiple of 4 */ |
494 | if (hdr->length % 4) | |
495 | { | |
496 | zlog_warn("Add Path: Received invalid length %d, non-multiple of 4", | |
497 | hdr->length); | |
498 | return -1; | |
499 | } | |
500 | ||
a82478b9 DS |
501 | while (stream_get_getp (s) + 4 <= end) |
502 | { | |
503 | afi_t afi = stream_getw (s); | |
504 | safi_t safi = stream_getc (s); | |
505 | u_char send_receive = stream_getc (s); | |
506 | ||
167d390a | 507 | if (bgp_debug_neighbor_events(peer)) |
a82478b9 DS |
508 | zlog_debug ("%s OPEN has AddPath CAP for afi/safi: %u/%u%s%s", |
509 | peer->host, afi, safi, | |
510 | (send_receive & BGP_ADDPATH_RX) ? ", receive" : "", | |
511 | (send_receive & BGP_ADDPATH_TX) ? ", transmit" : ""); | |
512 | ||
513 | if (!bgp_afi_safi_valid_indices (afi, &safi)) | |
823b8f7c DS |
514 | { |
515 | if (bgp_debug_neighbor_events(peer)) | |
516 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not supported." | |
517 | " Ignore the Addpath Attribute for this AFI/SAFI", | |
518 | peer->host, afi, safi); | |
519 | continue; | |
520 | } | |
521 | else if (!peer->afc[afi][safi]) | |
522 | { | |
523 | if (bgp_debug_neighbor_events(peer)) | |
524 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not enabled." | |
525 | " Ignore the AddPath capability for this AFI/SAFI", | |
526 | peer->host, afi, safi); | |
527 | continue; | |
528 | } | |
a82478b9 DS |
529 | |
530 | if (send_receive & BGP_ADDPATH_RX) | |
531 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_RCV); | |
532 | ||
533 | if (send_receive & BGP_ADDPATH_TX) | |
534 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_RCV); | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
8a92a8a0 DS |
540 | static int |
541 | bgp_capability_enhe (struct peer *peer, struct capability_header *hdr) | |
542 | { | |
543 | struct stream *s = BGP_INPUT (peer); | |
544 | size_t end = stream_get_getp (s) + hdr->length; | |
545 | ||
14051b36 DS |
546 | /* Verify length is a multiple of 4 */ |
547 | if (hdr->length % 6) | |
548 | { | |
549 | zlog_warn("Extended NH: Received invalid length %d, non-multiple of 6", | |
550 | hdr->length); | |
551 | return -1; | |
552 | } | |
553 | ||
8a92a8a0 DS |
554 | while (stream_get_getp (s) + 6 <= end) |
555 | { | |
556 | afi_t afi = stream_getw (s); | |
557 | safi_t safi = stream_getw (s); | |
558 | afi_t nh_afi = stream_getw (s); | |
559 | ||
560 | if (bgp_debug_neighbor_events(peer)) | |
a656dafa | 561 | zlog_debug ("%s Received with afi/safi/next-hop afi: %u/%u/%u", |
8a92a8a0 DS |
562 | peer->host, afi, safi, nh_afi); |
563 | ||
564 | if (!bgp_afi_safi_valid_indices (afi, &safi)) | |
8a92a8a0 | 565 | { |
a656dafa | 566 | if (bgp_debug_neighbor_events(peer)) |
567 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not supported." | |
568 | " Ignore the ENHE Attribute for this AFI/SAFI", | |
569 | peer->host, afi, safi); | |
570 | continue; | |
8a92a8a0 DS |
571 | } |
572 | ||
a656dafa | 573 | /* RFC 5549 specifies use of this capability only for IPv4 AFI, with |
574 | * the Nexthop AFI being IPv6. A future spec may introduce other | |
575 | * possibilities, so we ignore other values with a log. Also, only | |
576 | * Unicast SAFI is currently supported (and expected). | |
577 | */ | |
578 | if (afi != AFI_IP || safi != SAFI_UNICAST || nh_afi != AFI_IP6) | |
579 | { | |
580 | zlog_warn ("%s Unexpected afi/safi/next-hop afi: %u/%u/%u " | |
581 | "in Extended Next-hop capability, ignoring", | |
582 | peer->host, afi, safi, nh_afi); | |
583 | continue; | |
584 | } | |
8a92a8a0 DS |
585 | |
586 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV); | |
587 | ||
588 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_ADV)) | |
589 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO); | |
590 | } | |
591 | ||
592 | SET_FLAG (peer->cap, PEER_CAP_ENHE_RCV); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
04b6bdc0 DW |
597 | static int |
598 | bgp_capability_hostname (struct peer *peer, struct capability_header *hdr) | |
599 | { | |
600 | struct stream *s = BGP_INPUT (peer); | |
601 | char str[BGP_MAX_HOSTNAME+1]; | |
602 | size_t end = stream_get_getp (s) + hdr->length; | |
603 | u_char len; | |
604 | ||
605 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_RCV); | |
606 | ||
607 | len = stream_getc(s); | |
608 | if (stream_get_getp(s) + len > end) | |
609 | { | |
610 | zlog_warn("%s: Received malformed hostname capability from peer %s", | |
611 | __FUNCTION__, peer->host); | |
612 | return -1; | |
613 | } | |
614 | ||
615 | if (len > BGP_MAX_HOSTNAME) | |
616 | { | |
617 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
618 | stream_forward_getp(s, len-BGP_MAX_HOSTNAME); | |
619 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
620 | } | |
621 | else if (len) | |
622 | stream_get(str, s, len); | |
623 | ||
624 | if (len) | |
625 | { | |
626 | str[len] = '\0'; | |
627 | ||
628 | if (peer->hostname != NULL) | |
f9e9e073 DW |
629 | { |
630 | XFREE(MTYPE_HOST, peer->hostname); | |
631 | peer->hostname = NULL; | |
632 | } | |
04b6bdc0 DW |
633 | |
634 | if (peer->domainname != NULL) | |
9e08021c DW |
635 | { |
636 | XFREE(MTYPE_HOST, peer->domainname); | |
637 | peer->domainname = NULL; | |
638 | } | |
04b6bdc0 DW |
639 | |
640 | peer->hostname = XSTRDUP(MTYPE_HOST, str); | |
641 | } | |
642 | ||
643 | if (stream_get_getp(s) +1 > end) | |
644 | { | |
645 | zlog_warn("%s: Received invalid domain name len (hostname capability) from peer %s", | |
646 | __FUNCTION__, peer->host); | |
647 | return -1; | |
648 | } | |
649 | ||
650 | len = stream_getc(s); | |
651 | if (stream_get_getp(s) + len > end) | |
652 | { | |
653 | zlog_warn("%s: Received runt domain name (hostname capability) from peer %s", | |
654 | __FUNCTION__, peer->host); | |
655 | return -1; | |
656 | } | |
657 | ||
658 | if (len > BGP_MAX_HOSTNAME) | |
659 | { | |
660 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
661 | stream_forward_getp(s, len-BGP_MAX_HOSTNAME); | |
662 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
663 | } | |
664 | else if (len) | |
665 | stream_get(str, s, len); | |
666 | ||
667 | if (len) | |
668 | { | |
669 | str[len] = '\0'; | |
670 | peer->domainname = XSTRDUP(MTYPE_HOST, str); | |
671 | } | |
672 | ||
673 | if (bgp_debug_neighbor_events(peer)) | |
674 | { | |
675 | zlog_debug("%s received hostname %s, domainname %s", | |
676 | peer->host, peer->hostname, peer->domainname); | |
677 | } | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
6410e93a | 682 | static const struct message capcode_str[] = |
6d58272b | 683 | { |
6d58272b PJ |
684 | { CAPABILITY_CODE_MP, "MultiProtocol Extensions" }, |
685 | { CAPABILITY_CODE_REFRESH, "Route Refresh" }, | |
686 | { CAPABILITY_CODE_ORF, "Cooperative Route Filtering" }, | |
687 | { CAPABILITY_CODE_RESTART, "Graceful Restart" }, | |
688 | { CAPABILITY_CODE_AS4, "4-octet AS number" }, | |
89eeecb8 | 689 | { CAPABILITY_CODE_ADDPATH, "AddPath" }, |
6d58272b | 690 | { CAPABILITY_CODE_DYNAMIC, "Dynamic" }, |
8a92a8a0 | 691 | { CAPABILITY_CODE_ENHE, "Extended Next Hop Encoding" }, |
89eeecb8 | 692 | { CAPABILITY_CODE_DYNAMIC_OLD, "Dynamic (Old)" }, |
6d58272b PJ |
693 | { CAPABILITY_CODE_REFRESH_OLD, "Route Refresh (Old)" }, |
694 | { CAPABILITY_CODE_ORF_OLD, "ORF (Old)" }, | |
04b6bdc0 | 695 | { CAPABILITY_CODE_FQDN, "FQDN" }, |
6d58272b | 696 | }; |
837d16cc | 697 | static const int capcode_str_max = array_size(capcode_str); |
6d58272b PJ |
698 | |
699 | /* Minimum sizes for length field of each cap (so not inc. the header) */ | |
fc52f953 | 700 | static const size_t cap_minsizes[] = |
6d58272b PJ |
701 | { |
702 | [CAPABILITY_CODE_MP] = sizeof (struct capability_mp_data), | |
703 | [CAPABILITY_CODE_REFRESH] = CAPABILITY_CODE_REFRESH_LEN, | |
704 | [CAPABILITY_CODE_ORF] = sizeof (struct capability_orf_entry), | |
370b64a2 | 705 | [CAPABILITY_CODE_RESTART] = sizeof (struct capability_gr), |
6d58272b | 706 | [CAPABILITY_CODE_AS4] = CAPABILITY_CODE_AS4_LEN, |
a82478b9 | 707 | [CAPABILITY_CODE_ADDPATH] = CAPABILITY_CODE_ADDPATH_LEN, |
6d58272b | 708 | [CAPABILITY_CODE_DYNAMIC] = CAPABILITY_CODE_DYNAMIC_LEN, |
89eeecb8 | 709 | [CAPABILITY_CODE_DYNAMIC_OLD] = CAPABILITY_CODE_DYNAMIC_LEN, |
8a92a8a0 | 710 | [CAPABILITY_CODE_ENHE] = CAPABILITY_CODE_ENHE_LEN, |
6d58272b PJ |
711 | [CAPABILITY_CODE_REFRESH_OLD] = CAPABILITY_CODE_REFRESH_LEN, |
712 | [CAPABILITY_CODE_ORF_OLD] = sizeof (struct capability_orf_entry), | |
04b6bdc0 | 713 | [CAPABILITY_CODE_FQDN] = CAPABILITY_CODE_MIN_FQDN_LEN, |
6d58272b PJ |
714 | }; |
715 | ||
3b381c32 AS |
716 | /** |
717 | * Parse given capability. | |
6d58272b | 718 | * XXX: This is reading into a stream, but not using stream API |
3b381c32 AS |
719 | * |
720 | * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol | |
721 | * capabilities were encountered. | |
6d58272b PJ |
722 | */ |
723 | static int | |
3b381c32 AS |
724 | bgp_capability_parse (struct peer *peer, size_t length, int *mp_capability, |
725 | u_char **error) | |
6d58272b PJ |
726 | { |
727 | int ret; | |
728 | struct stream *s = BGP_INPUT (peer); | |
729 | size_t end = stream_get_getp (s) + length; | |
730 | ||
731 | assert (STREAM_READABLE (s) >= length); | |
732 | ||
733 | while (stream_get_getp (s) < end) | |
734 | { | |
735 | size_t start; | |
736 | u_char *sp = stream_pnt (s); | |
737 | struct capability_header caphdr; | |
14051b36 DS |
738 | |
739 | ret = 0; | |
718e3744 | 740 | /* We need at least capability code and capability length. */ |
6d58272b | 741 | if (stream_get_getp(s) + 2 > end) |
718e3744 | 742 | { |
6d58272b | 743 | zlog_info ("%s Capability length error (< header)", peer->host); |
09825025 | 744 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 745 | return -1; |
746 | } | |
6d58272b PJ |
747 | |
748 | caphdr.code = stream_getc (s); | |
749 | caphdr.length = stream_getc (s); | |
750 | start = stream_get_getp (s); | |
751 | ||
752 | /* Capability length check sanity check. */ | |
753 | if (start + caphdr.length > end) | |
718e3744 | 754 | { |
6d58272b | 755 | zlog_info ("%s Capability length error (< length)", peer->host); |
09825025 | 756 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 757 | return -1; |
758 | } | |
6d58272b | 759 | |
16286195 | 760 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
761 | zlog_debug ("%s OPEN has %s capability (%u), length %u", |
762 | peer->host, | |
763 | LOOKUP (capcode_str, caphdr.code), | |
764 | caphdr.code, caphdr.length); | |
765 | ||
766 | /* Length sanity check, type-specific, for known capabilities */ | |
767 | switch (caphdr.code) | |
768 | { | |
769 | case CAPABILITY_CODE_MP: | |
770 | case CAPABILITY_CODE_REFRESH: | |
771 | case CAPABILITY_CODE_REFRESH_OLD: | |
772 | case CAPABILITY_CODE_ORF: | |
773 | case CAPABILITY_CODE_ORF_OLD: | |
774 | case CAPABILITY_CODE_RESTART: | |
0b2aa3a0 | 775 | case CAPABILITY_CODE_AS4: |
a82478b9 | 776 | case CAPABILITY_CODE_ADDPATH: |
6d58272b | 777 | case CAPABILITY_CODE_DYNAMIC: |
89eeecb8 | 778 | case CAPABILITY_CODE_DYNAMIC_OLD: |
8a92a8a0 | 779 | case CAPABILITY_CODE_ENHE: |
04b6bdc0 | 780 | case CAPABILITY_CODE_FQDN: |
6d58272b PJ |
781 | /* Check length. */ |
782 | if (caphdr.length < cap_minsizes[caphdr.code]) | |
783 | { | |
784 | zlog_info ("%s %s Capability length error: got %u," | |
785 | " expected at least %u", | |
786 | peer->host, | |
787 | LOOKUP (capcode_str, caphdr.code), | |
fc52f953 SH |
788 | caphdr.length, |
789 | (unsigned) cap_minsizes[caphdr.code]); | |
09825025 | 790 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
6d58272b PJ |
791 | return -1; |
792 | } | |
793 | /* we deliberately ignore unknown codes, see below */ | |
794 | default: | |
795 | break; | |
796 | } | |
797 | ||
798 | switch (caphdr.code) | |
799 | { | |
800 | case CAPABILITY_CODE_MP: | |
801 | { | |
3b381c32 AS |
802 | *mp_capability = 1; |
803 | ||
6d58272b PJ |
804 | /* Ignore capability when override-capability is set. */ |
805 | if (! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) | |
806 | { | |
807 | /* Set negotiated value. */ | |
808 | ret = bgp_capability_mp (peer, &caphdr); | |
809 | ||
810 | /* Unsupported Capability. */ | |
811 | if (ret < 0) | |
812 | { | |
813 | /* Store return data. */ | |
814 | memcpy (*error, sp, caphdr.length + 2); | |
815 | *error += caphdr.length + 2; | |
816 | } | |
14051b36 | 817 | ret = 0; /* Don't return error for this */ |
6d58272b PJ |
818 | } |
819 | } | |
820 | break; | |
821 | case CAPABILITY_CODE_REFRESH: | |
822 | case CAPABILITY_CODE_REFRESH_OLD: | |
823 | { | |
824 | /* BGP refresh capability */ | |
825 | if (caphdr.code == CAPABILITY_CODE_REFRESH_OLD) | |
826 | SET_FLAG (peer->cap, PEER_CAP_REFRESH_OLD_RCV); | |
827 | else | |
828 | SET_FLAG (peer->cap, PEER_CAP_REFRESH_NEW_RCV); | |
829 | } | |
830 | break; | |
831 | case CAPABILITY_CODE_ORF: | |
832 | case CAPABILITY_CODE_ORF_OLD: | |
14051b36 | 833 | ret = bgp_capability_orf_entry (peer, &caphdr); |
6d58272b PJ |
834 | break; |
835 | case CAPABILITY_CODE_RESTART: | |
14051b36 | 836 | ret = bgp_capability_restart (peer, &caphdr); |
6d58272b PJ |
837 | break; |
838 | case CAPABILITY_CODE_DYNAMIC: | |
89eeecb8 | 839 | case CAPABILITY_CODE_DYNAMIC_OLD: |
6d58272b PJ |
840 | SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_RCV); |
841 | break; | |
0b2aa3a0 PJ |
842 | case CAPABILITY_CODE_AS4: |
843 | /* Already handled as a special-case parsing of the capabilities | |
844 | * at the beginning of OPEN processing. So we care not a jot | |
845 | * for the value really, only error case. | |
846 | */ | |
847 | if (!bgp_capability_as4 (peer, &caphdr)) | |
14051b36 | 848 | ret = -1; |
0b2aa3a0 | 849 | break; |
a82478b9 | 850 | case CAPABILITY_CODE_ADDPATH: |
14051b36 | 851 | ret = bgp_capability_addpath (peer, &caphdr); |
a82478b9 | 852 | break; |
8a92a8a0 | 853 | case CAPABILITY_CODE_ENHE: |
14051b36 | 854 | ret = bgp_capability_enhe (peer, &caphdr); |
8a92a8a0 | 855 | break; |
04b6bdc0 DW |
856 | case CAPABILITY_CODE_FQDN: |
857 | ret = bgp_capability_hostname (peer, &caphdr); | |
858 | break; | |
6d58272b PJ |
859 | default: |
860 | if (caphdr.code > 128) | |
861 | { | |
862 | /* We don't send Notification for unknown vendor specific | |
863 | capabilities. It seems reasonable for now... */ | |
864 | zlog_warn ("%s Vendor specific capability %d", | |
865 | peer->host, caphdr.code); | |
866 | } | |
867 | else | |
868 | { | |
869 | zlog_warn ("%s unrecognized capability code: %d - ignored", | |
870 | peer->host, caphdr.code); | |
871 | memcpy (*error, sp, caphdr.length + 2); | |
872 | *error += caphdr.length + 2; | |
873 | } | |
874 | } | |
14051b36 DS |
875 | |
876 | if (ret < 0) | |
877 | { | |
09825025 | 878 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
14051b36 DS |
879 | return -1; |
880 | } | |
6d58272b PJ |
881 | if (stream_get_getp(s) != (start + caphdr.length)) |
882 | { | |
883 | if (stream_get_getp(s) > (start + caphdr.length)) | |
884 | zlog_warn ("%s Cap-parser for %s read past cap-length, %u!", | |
885 | peer->host, LOOKUP (capcode_str, caphdr.code), | |
886 | caphdr.length); | |
887 | stream_set_getp (s, start + caphdr.length); | |
888 | } | |
718e3744 | 889 | } |
890 | return 0; | |
891 | } | |
892 | ||
94f2b392 | 893 | static int |
6d58272b | 894 | bgp_auth_parse (struct peer *peer, size_t length) |
718e3744 | 895 | { |
896 | bgp_notify_send (peer, | |
897 | BGP_NOTIFY_OPEN_ERR, | |
898 | BGP_NOTIFY_OPEN_AUTH_FAILURE); | |
899 | return -1; | |
900 | } | |
901 | ||
94f2b392 | 902 | static int |
718e3744 | 903 | strict_capability_same (struct peer *peer) |
904 | { | |
905 | int i, j; | |
906 | ||
907 | for (i = AFI_IP; i < AFI_MAX; i++) | |
908 | for (j = SAFI_UNICAST; j < SAFI_MAX; j++) | |
909 | if (peer->afc[i][j] != peer->afc_nego[i][j]) | |
910 | return 0; | |
911 | return 1; | |
912 | } | |
913 | ||
0b2aa3a0 PJ |
914 | /* peek into option, stores ASN to *as4 if the AS4 capability was found. |
915 | * Returns 0 if no as4 found, as4cap value otherwise. | |
916 | */ | |
917 | as_t | |
918 | peek_for_as4_capability (struct peer *peer, u_char length) | |
919 | { | |
920 | struct stream *s = BGP_INPUT (peer); | |
921 | size_t orig_getp = stream_get_getp (s); | |
922 | size_t end = orig_getp + length; | |
923 | as_t as4 = 0; | |
924 | ||
0b2aa3a0 PJ |
925 | if (BGP_DEBUG (as4, AS4)) |
926 | zlog_info ("%s [AS4] rcv OPEN w/ OPTION parameter len: %u," | |
927 | " peeking for as4", | |
928 | peer->host, length); | |
929 | /* the error cases we DONT handle, we ONLY try to read as4 out of | |
930 | * correctly formatted options. | |
931 | */ | |
932 | while (stream_get_getp(s) < end) | |
933 | { | |
934 | u_char opt_type; | |
935 | u_char opt_length; | |
936 | ||
937 | /* Check the length. */ | |
938 | if (stream_get_getp (s) + 2 > end) | |
939 | goto end; | |
940 | ||
941 | /* Fetch option type and length. */ | |
942 | opt_type = stream_getc (s); | |
943 | opt_length = stream_getc (s); | |
944 | ||
945 | /* Option length check. */ | |
946 | if (stream_get_getp (s) + opt_length > end) | |
947 | goto end; | |
948 | ||
949 | if (opt_type == BGP_OPEN_OPT_CAP) | |
950 | { | |
951 | unsigned long capd_start = stream_get_getp (s); | |
952 | unsigned long capd_end = capd_start + opt_length; | |
953 | ||
954 | assert (capd_end <= end); | |
955 | ||
956 | while (stream_get_getp (s) < capd_end) | |
957 | { | |
958 | struct capability_header hdr; | |
959 | ||
960 | if (stream_get_getp (s) + 2 > capd_end) | |
961 | goto end; | |
962 | ||
963 | hdr.code = stream_getc (s); | |
964 | hdr.length = stream_getc (s); | |
965 | ||
966 | if ((stream_get_getp(s) + hdr.length) > capd_end) | |
967 | goto end; | |
968 | ||
969 | if (hdr.code == CAPABILITY_CODE_AS4) | |
970 | { | |
0b2aa3a0 PJ |
971 | if (BGP_DEBUG (as4, AS4)) |
972 | zlog_info ("[AS4] found AS4 capability, about to parse"); | |
973 | as4 = bgp_capability_as4 (peer, &hdr); | |
974 | ||
975 | goto end; | |
976 | } | |
977 | stream_forward_getp (s, hdr.length); | |
978 | } | |
979 | } | |
980 | } | |
981 | ||
982 | end: | |
983 | stream_set_getp (s, orig_getp); | |
984 | return as4; | |
985 | } | |
986 | ||
3b381c32 AS |
987 | /** |
988 | * Parse open option. | |
989 | * | |
990 | * @param[out] mp_capability @see bgp_capability_parse() for semantics. | |
991 | */ | |
718e3744 | 992 | int |
3b381c32 | 993 | bgp_open_option_parse (struct peer *peer, u_char length, int *mp_capability) |
718e3744 | 994 | { |
18f1dc06 | 995 | int ret = 0; |
718e3744 | 996 | u_char *error; |
997 | u_char error_data[BGP_MAX_PACKET_SIZE]; | |
6d58272b PJ |
998 | struct stream *s = BGP_INPUT(peer); |
999 | size_t end = stream_get_getp (s) + length; | |
718e3744 | 1000 | |
718e3744 | 1001 | error = error_data; |
1002 | ||
16286195 | 1003 | if (bgp_debug_neighbor_events(peer)) |
8325cd7f | 1004 | zlog_debug ("%s rcv OPEN w/ OPTION parameter len: %u", |
718e3744 | 1005 | peer->host, length); |
1006 | ||
6d58272b | 1007 | while (stream_get_getp(s) < end) |
718e3744 | 1008 | { |
6d58272b PJ |
1009 | u_char opt_type; |
1010 | u_char opt_length; | |
1011 | ||
1012 | /* Must have at least an OPEN option header */ | |
1013 | if (STREAM_READABLE(s) < 2) | |
718e3744 | 1014 | { |
1015 | zlog_info ("%s Option length error", peer->host); | |
09825025 | 1016 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 1017 | return -1; |
1018 | } | |
1019 | ||
1020 | /* Fetch option type and length. */ | |
6d58272b PJ |
1021 | opt_type = stream_getc (s); |
1022 | opt_length = stream_getc (s); | |
718e3744 | 1023 | |
1024 | /* Option length check. */ | |
6d58272b | 1025 | if (STREAM_READABLE (s) < opt_length) |
718e3744 | 1026 | { |
1027 | zlog_info ("%s Option length error", peer->host); | |
09825025 | 1028 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 1029 | return -1; |
1030 | } | |
1031 | ||
16286195 | 1032 | if (bgp_debug_neighbor_events(peer)) |
8325cd7f | 1033 | zlog_debug ("%s rcvd OPEN w/ optional parameter type %u (%s) len %u", |
718e3744 | 1034 | peer->host, opt_type, |
1035 | opt_type == BGP_OPEN_OPT_AUTH ? "Authentication" : | |
1036 | opt_type == BGP_OPEN_OPT_CAP ? "Capability" : "Unknown", | |
1037 | opt_length); | |
1038 | ||
1039 | switch (opt_type) | |
1040 | { | |
1041 | case BGP_OPEN_OPT_AUTH: | |
6d58272b | 1042 | ret = bgp_auth_parse (peer, opt_length); |
718e3744 | 1043 | break; |
1044 | case BGP_OPEN_OPT_CAP: | |
3b381c32 | 1045 | ret = bgp_capability_parse (peer, opt_length, mp_capability, &error); |
718e3744 | 1046 | break; |
1047 | default: | |
1048 | bgp_notify_send (peer, | |
1049 | BGP_NOTIFY_OPEN_ERR, | |
1050 | BGP_NOTIFY_OPEN_UNSUP_PARAM); | |
1051 | ret = -1; | |
1052 | break; | |
1053 | } | |
1054 | ||
1055 | /* Parse error. To accumulate all unsupported capability codes, | |
1056 | bgp_capability_parse does not return -1 when encounter | |
1057 | unsupported capability code. To detect that, please check | |
1058 | error and erro_data pointer, like below. */ | |
1059 | if (ret < 0) | |
1060 | return -1; | |
718e3744 | 1061 | } |
1062 | ||
1063 | /* All OPEN option is parsed. Check capability when strict compare | |
1064 | flag is enabled.*/ | |
1065 | if (CHECK_FLAG (peer->flags, PEER_FLAG_STRICT_CAP_MATCH)) | |
1066 | { | |
1067 | /* If Unsupported Capability exists. */ | |
1068 | if (error != error_data) | |
1069 | { | |
1070 | bgp_notify_send_with_data (peer, | |
1071 | BGP_NOTIFY_OPEN_ERR, | |
1072 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1073 | error_data, error - error_data); | |
1074 | return -1; | |
1075 | } | |
1076 | ||
1077 | /* Check local capability does not negotiated with remote | |
1078 | peer. */ | |
1079 | if (! strict_capability_same (peer)) | |
1080 | { | |
1081 | bgp_notify_send (peer, | |
1082 | BGP_NOTIFY_OPEN_ERR, | |
1083 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1084 | return -1; | |
1085 | } | |
1086 | } | |
1087 | ||
3b381c32 | 1088 | /* Check there are no common AFI/SAFIs and send Unsupported Capability |
718e3744 | 1089 | error. */ |
3b381c32 AS |
1090 | if (*mp_capability && |
1091 | ! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) | |
718e3744 | 1092 | { |
1093 | if (! peer->afc_nego[AFI_IP][SAFI_UNICAST] | |
1094 | && ! peer->afc_nego[AFI_IP][SAFI_MULTICAST] | |
1095 | && ! peer->afc_nego[AFI_IP][SAFI_MPLS_VPN] | |
1096 | && ! peer->afc_nego[AFI_IP6][SAFI_UNICAST] | |
1097 | && ! peer->afc_nego[AFI_IP6][SAFI_MULTICAST]) | |
1098 | { | |
16286195 | 1099 | zlog_err ("%s [Error] Configured AFI/SAFIs do not " |
3b381c32 AS |
1100 | "overlap with received MP capabilities", |
1101 | peer->host); | |
718e3744 | 1102 | |
1103 | if (error != error_data) | |
718e3744 | 1104 | bgp_notify_send_with_data (peer, |
1105 | BGP_NOTIFY_OPEN_ERR, | |
1106 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1107 | error_data, error - error_data); | |
1108 | else | |
1109 | bgp_notify_send (peer, | |
1110 | BGP_NOTIFY_OPEN_ERR, | |
1111 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1112 | return -1; | |
1113 | } | |
1114 | } | |
1115 | return 0; | |
1116 | } | |
1117 | ||
94f2b392 | 1118 | static void |
718e3744 | 1119 | bgp_open_capability_orf (struct stream *s, struct peer *peer, |
1120 | afi_t afi, safi_t safi, u_char code) | |
1121 | { | |
1122 | u_char cap_len; | |
1123 | u_char orf_len; | |
1124 | unsigned long capp; | |
1125 | unsigned long orfp; | |
1126 | unsigned long numberp; | |
1127 | int number_of_orfs = 0; | |
1128 | ||
1129 | if (safi == SAFI_MPLS_VPN) | |
42e6d745 | 1130 | safi = SAFI_MPLS_LABELED_VPN; |
718e3744 | 1131 | |
1132 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
9985f83c | 1133 | capp = stream_get_endp (s); /* Set Capability Len Pointer */ |
718e3744 | 1134 | stream_putc (s, 0); /* Capability Length */ |
1135 | stream_putc (s, code); /* Capability Code */ | |
9985f83c | 1136 | orfp = stream_get_endp (s); /* Set ORF Len Pointer */ |
718e3744 | 1137 | stream_putc (s, 0); /* ORF Length */ |
1138 | stream_putw (s, afi); | |
1139 | stream_putc (s, 0); | |
1140 | stream_putc (s, safi); | |
9985f83c | 1141 | numberp = stream_get_endp (s); /* Set Number Pointer */ |
718e3744 | 1142 | stream_putc (s, 0); /* Number of ORFs */ |
1143 | ||
1144 | /* Address Prefix ORF */ | |
1145 | if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1146 | || CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) | |
1147 | { | |
1148 | stream_putc (s, (code == CAPABILITY_CODE_ORF ? | |
1149 | ORF_TYPE_PREFIX : ORF_TYPE_PREFIX_OLD)); | |
1150 | ||
1151 | if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1152 | && CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) | |
1153 | { | |
1154 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV); | |
1155 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV); | |
1156 | stream_putc (s, ORF_MODE_BOTH); | |
1157 | } | |
1158 | else if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)) | |
1159 | { | |
1160 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV); | |
1161 | stream_putc (s, ORF_MODE_SEND); | |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV); | |
1166 | stream_putc (s, ORF_MODE_RECEIVE); | |
1167 | } | |
1168 | number_of_orfs++; | |
1169 | } | |
1170 | ||
1171 | /* Total Number of ORFs. */ | |
1172 | stream_putc_at (s, numberp, number_of_orfs); | |
1173 | ||
1174 | /* Total ORF Len. */ | |
9985f83c | 1175 | orf_len = stream_get_endp (s) - orfp - 1; |
718e3744 | 1176 | stream_putc_at (s, orfp, orf_len); |
1177 | ||
1178 | /* Total Capability Len. */ | |
9985f83c | 1179 | cap_len = stream_get_endp (s) - capp - 1; |
718e3744 | 1180 | stream_putc_at (s, capp, cap_len); |
1181 | } | |
1182 | ||
1183 | /* Fill in capability open option to the packet. */ | |
1184 | void | |
1185 | bgp_open_capability (struct stream *s, struct peer *peer) | |
1186 | { | |
1187 | u_char len; | |
fe7d2a48 | 1188 | unsigned long cp, capp, rcapp; |
718e3744 | 1189 | afi_t afi; |
1190 | safi_t safi; | |
0b2aa3a0 | 1191 | as_t local_as; |
fe7d2a48 | 1192 | u_int32_t restart_time; |
a82478b9 | 1193 | u_char afi_safi_count = 0; |
04b6bdc0 | 1194 | struct utsname names; |
adbac85e | 1195 | int adv_addpath_tx = 0; |
718e3744 | 1196 | |
1197 | /* Remember current pointer for Opt Parm Len. */ | |
9985f83c | 1198 | cp = stream_get_endp (s); |
718e3744 | 1199 | |
1200 | /* Opt Parm Len. */ | |
1201 | stream_putc (s, 0); | |
1202 | ||
1203 | /* Do not send capability. */ | |
1204 | if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN) | |
1205 | || CHECK_FLAG (peer->flags, PEER_FLAG_DONT_CAPABILITY)) | |
1206 | return; | |
1207 | ||
718e3744 | 1208 | /* IPv4 unicast. */ |
1209 | if (peer->afc[AFI_IP][SAFI_UNICAST]) | |
1210 | { | |
1211 | peer->afc_adv[AFI_IP][SAFI_UNICAST] = 1; | |
1212 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1213 | stream_putc (s, CAPABILITY_CODE_MP_LEN + 2); | |
1214 | stream_putc (s, CAPABILITY_CODE_MP); | |
1215 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1216 | stream_putw (s, AFI_IP); | |
1217 | stream_putc (s, 0); | |
1218 | stream_putc (s, SAFI_UNICAST); | |
1219 | } | |
1220 | /* IPv4 multicast. */ | |
1221 | if (peer->afc[AFI_IP][SAFI_MULTICAST]) | |
1222 | { | |
1223 | peer->afc_adv[AFI_IP][SAFI_MULTICAST] = 1; | |
1224 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1225 | stream_putc (s, CAPABILITY_CODE_MP_LEN + 2); | |
1226 | stream_putc (s, CAPABILITY_CODE_MP); | |
1227 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1228 | stream_putw (s, AFI_IP); | |
1229 | stream_putc (s, 0); | |
1230 | stream_putc (s, SAFI_MULTICAST); | |
1231 | } | |
1232 | /* IPv4 VPN */ | |
1233 | if (peer->afc[AFI_IP][SAFI_MPLS_VPN]) | |
1234 | { | |
1235 | peer->afc_adv[AFI_IP][SAFI_MPLS_VPN] = 1; | |
1236 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1237 | stream_putc (s, CAPABILITY_CODE_MP_LEN + 2); | |
1238 | stream_putc (s, CAPABILITY_CODE_MP); | |
1239 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1240 | stream_putw (s, AFI_IP); | |
1241 | stream_putc (s, 0); | |
42e6d745 | 1242 | stream_putc (s, SAFI_MPLS_LABELED_VPN); |
718e3744 | 1243 | } |
1244 | #ifdef HAVE_IPV6 | |
8a92a8a0 DS |
1245 | /* Currently supporting RFC-5549 for Link-Local peering only */ |
1246 | if (CHECK_FLAG (peer->flags, PEER_FLAG_CAPABILITY_ENHE) && | |
1247 | peer->su.sa.sa_family == AF_INET6 && | |
1248 | IN6_IS_ADDR_LINKLOCAL(&peer->su.sin6.sin6_addr)) | |
1249 | { | |
1250 | /* RFC 5549 Extended Next Hop Encoding */ | |
1251 | SET_FLAG (peer->cap, PEER_CAP_ENHE_ADV); | |
1252 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1253 | stream_putc (s, CAPABILITY_CODE_ENHE_LEN + 2); | |
1254 | stream_putc (s, CAPABILITY_CODE_ENHE); | |
1255 | stream_putc (s, CAPABILITY_CODE_ENHE_LEN); | |
1256 | /* Currently supporting for SAFI_UNICAST only */ | |
1257 | SET_FLAG (peer->af_cap[AFI_IP][SAFI_UNICAST], PEER_CAP_ENHE_AF_ADV); | |
1258 | stream_putw (s, AFI_IP); | |
1259 | stream_putw (s, SAFI_UNICAST); | |
1260 | stream_putw (s, AFI_IP6); | |
1261 | ||
1262 | if (CHECK_FLAG (peer->af_cap[AFI_IP][SAFI_UNICAST], PEER_CAP_ENHE_AF_RCV)) | |
1263 | SET_FLAG (peer->af_cap[AFI_IP][SAFI_UNICAST], PEER_CAP_ENHE_AF_NEGO); | |
1264 | } | |
718e3744 | 1265 | /* IPv6 unicast. */ |
1266 | if (peer->afc[AFI_IP6][SAFI_UNICAST]) | |
1267 | { | |
1268 | peer->afc_adv[AFI_IP6][SAFI_UNICAST] = 1; | |
1269 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1270 | stream_putc (s, CAPABILITY_CODE_MP_LEN + 2); | |
1271 | stream_putc (s, CAPABILITY_CODE_MP); | |
1272 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1273 | stream_putw (s, AFI_IP6); | |
1274 | stream_putc (s, 0); | |
1275 | stream_putc (s, SAFI_UNICAST); | |
1276 | } | |
1277 | /* IPv6 multicast. */ | |
1278 | if (peer->afc[AFI_IP6][SAFI_MULTICAST]) | |
1279 | { | |
1280 | peer->afc_adv[AFI_IP6][SAFI_MULTICAST] = 1; | |
1281 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1282 | stream_putc (s, CAPABILITY_CODE_MP_LEN + 2); | |
1283 | stream_putc (s, CAPABILITY_CODE_MP); | |
1284 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1285 | stream_putw (s, AFI_IP6); | |
1286 | stream_putc (s, 0); | |
1287 | stream_putc (s, SAFI_MULTICAST); | |
1288 | } | |
1289 | #endif /* HAVE_IPV6 */ | |
1290 | ||
1291 | /* Route refresh. */ | |
c9502438 | 1292 | SET_FLAG (peer->cap, PEER_CAP_REFRESH_ADV); |
1293 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1294 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1295 | stream_putc (s, CAPABILITY_CODE_REFRESH_OLD); | |
1296 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN); | |
1297 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1298 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1299 | stream_putc (s, CAPABILITY_CODE_REFRESH); | |
1300 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN); | |
718e3744 | 1301 | |
0b2aa3a0 PJ |
1302 | /* AS4 */ |
1303 | SET_FLAG (peer->cap, PEER_CAP_AS4_ADV); | |
1304 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1305 | stream_putc (s, CAPABILITY_CODE_AS4_LEN + 2); | |
1306 | stream_putc (s, CAPABILITY_CODE_AS4); | |
1307 | stream_putc (s, CAPABILITY_CODE_AS4_LEN); | |
1308 | if ( peer->change_local_as ) | |
1309 | local_as = peer->change_local_as; | |
1310 | else | |
1311 | local_as = peer->local_as; | |
1312 | stream_putl (s, local_as ); | |
1313 | ||
adbac85e | 1314 | /* AddPath */ |
a82478b9 DS |
1315 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) |
1316 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1317 | if (peer->afc[afi][safi]) | |
adbac85e DW |
1318 | { |
1319 | afi_safi_count++; | |
1320 | ||
1321 | /* Only advertise addpath TX if a feature that will use it is | |
1322 | * configured */ | |
06370dac DW |
1323 | if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS) || |
1324 | CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) | |
adbac85e DW |
1325 | adv_addpath_tx = 1; |
1326 | } | |
a82478b9 DS |
1327 | |
1328 | SET_FLAG (peer->cap, PEER_CAP_ADDPATH_ADV); | |
1329 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1330 | stream_putc (s, (CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count) + 2); | |
1331 | stream_putc (s, CAPABILITY_CODE_ADDPATH); | |
1332 | stream_putc (s, CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count); | |
1333 | ||
1334 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
1335 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1336 | if (peer->afc[afi][safi]) | |
1337 | { | |
1338 | stream_putw (s, afi); | |
1339 | stream_putc (s, safi); | |
adbac85e DW |
1340 | |
1341 | if (adv_addpath_tx) | |
1342 | { | |
1343 | stream_putc (s, BGP_ADDPATH_RX|BGP_ADDPATH_TX); | |
1344 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV); | |
1345 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_ADV); | |
1346 | } | |
1347 | else | |
1348 | { | |
1349 | stream_putc (s, BGP_ADDPATH_RX); | |
1350 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV); | |
1351 | UNSET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_ADV); | |
1352 | } | |
a82478b9 DS |
1353 | } |
1354 | ||
718e3744 | 1355 | /* ORF capability. */ |
1356 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
1357 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1358 | if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1359 | || CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) | |
1360 | { | |
1361 | bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF_OLD); | |
1362 | bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF); | |
1363 | } | |
1364 | ||
1365 | /* Dynamic capability. */ | |
1366 | if (CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY)) | |
1367 | { | |
1368 | SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV); | |
1369 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1370 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
89eeecb8 DS |
1371 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_OLD); |
1372 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1373 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1374 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
718e3744 | 1375 | stream_putc (s, CAPABILITY_CODE_DYNAMIC); |
1376 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1377 | } | |
1378 | ||
04b6bdc0 DW |
1379 | /* Hostname capability */ |
1380 | uname(&names); | |
1381 | if (names.nodename[0] != '\0') | |
1382 | { | |
1383 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_ADV); | |
1384 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1385 | rcapp = stream_get_endp(s); /* Ptr to length placeholder */ | |
1386 | stream_putc(s, 0); /* dummy len for now */ | |
1387 | stream_putc (s, CAPABILITY_CODE_FQDN); | |
1388 | capp = stream_get_endp(s); | |
1389 | stream_putc(s, 0); /* dummy len for now */ | |
1390 | len = strlen(names.nodename); | |
1391 | if (len > BGP_MAX_HOSTNAME) | |
1392 | len = BGP_MAX_HOSTNAME; | |
1393 | ||
1394 | stream_putc(s, len); | |
1395 | stream_put(s, names.nodename, len); | |
1396 | #ifdef _GNU_SOURCE | |
1397 | if ((names.domainname[0] != '\0') && | |
1398 | (strcmp(names.domainname, "(none)") != 0)) | |
1399 | { | |
1400 | len = strlen(names.domainname); | |
1401 | if (len > BGP_MAX_HOSTNAME) | |
1402 | len = BGP_MAX_HOSTNAME; | |
1403 | ||
1404 | stream_putc(s, len); | |
1405 | stream_put(s, names.domainname, len); | |
1406 | } | |
1407 | else | |
1408 | #endif | |
1409 | { | |
1410 | stream_putc(s, 0); /* 0 length */ | |
1411 | } | |
1412 | ||
1413 | /* Set the lengths straight */ | |
1414 | len = stream_get_endp(s) - rcapp - 1; | |
1415 | stream_putc_at(s, rcapp, len); | |
1416 | len = stream_get_endp(s) - capp - 1; | |
1417 | stream_putc_at(s, capp, len); | |
1418 | ||
1419 | if (bgp_debug_neighbor_events(peer)) | |
1420 | zlog_debug("%s Sending hostname cap with hn = %s, dn = %s", | |
1421 | peer->host, names.nodename, names.domainname); | |
1422 | } | |
1423 | ||
fe7d2a48 DS |
1424 | /* Sending base graceful-restart capability irrespective of the config */ |
1425 | SET_FLAG (peer->cap, PEER_CAP_RESTART_ADV); | |
1426 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1427 | capp = stream_get_endp (s); /* Set Capability Len Pointer */ | |
1428 | stream_putc (s, 0); /* Capability Length */ | |
1429 | stream_putc (s, CAPABILITY_CODE_RESTART); | |
1430 | rcapp = stream_get_endp (s); /* Set Restart Capability Len Pointer */ | |
1431 | stream_putc (s, 0); | |
1432 | restart_time = peer->bgp->restart_time; | |
1433 | if (peer->bgp->t_startup) | |
1434 | { | |
1435 | SET_FLAG (restart_time, RESTART_R_BIT); | |
1436 | SET_FLAG (peer->cap, PEER_CAP_RESTART_BIT_ADV); | |
1437 | } | |
1438 | stream_putw (s, restart_time); | |
1439 | ||
1440 | /* Send address-family specific graceful-restart capability only when GR config | |
1441 | is present */ | |
538621f2 | 1442 | if (bgp_flag_check (peer->bgp, BGP_FLAG_GRACEFUL_RESTART)) |
1443 | { | |
fe7d2a48 DS |
1444 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) |
1445 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1446 | if (peer->afc[afi][safi]) | |
1447 | { | |
1448 | stream_putw (s, afi); | |
1449 | stream_putc (s, safi); | |
1450 | stream_putc (s, 0); //Forwarding is not retained as of now. | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /* Total Graceful restart capability Len. */ | |
1455 | len = stream_get_endp (s) - rcapp - 1; | |
1456 | stream_putc_at (s, rcapp, len); | |
1457 | ||
1458 | /* Total Capability Len. */ | |
1459 | len = stream_get_endp (s) - capp - 1; | |
1460 | stream_putc_at (s, capp, len); | |
538621f2 | 1461 | |
718e3744 | 1462 | /* Total Opt Parm Len. */ |
9985f83c | 1463 | len = stream_get_endp (s) - cp - 1; |
718e3744 | 1464 | stream_putc_at (s, cp, len); |
1465 | } |