]>
Commit | Line | Data |
---|---|---|
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 | ||
54 | void | |
856ca177 | 55 | bgp_capability_vty_out (struct vty *vty, struct peer *peer, u_char use_json, json_object *json_neigh) |
718e3744 | 56 | { |
5228ad27 | 57 | char *pnt; |
58 | char *end; | |
6d58272b PJ |
59 | struct capability_mp_data mpc; |
60 | struct capability_header *hdr; | |
856ca177 MS |
61 | json_object *json_cap = NULL; |
62 | ||
63 | if (use_json) | |
64 | json_cap = json_object_new_object(); | |
718e3744 | 65 | |
66 | pnt = peer->notify.data; | |
67 | end = pnt + peer->notify.length; | |
6d58272b | 68 | |
718e3744 | 69 | while (pnt < end) |
70 | { | |
6d58272b | 71 | if (pnt + sizeof (struct capability_mp_data) + 2 > end) |
718e3744 | 72 | return; |
6d58272b PJ |
73 | |
74 | hdr = (struct capability_header *)pnt; | |
75 | if (pnt + hdr->length + 2 > end) | |
718e3744 | 76 | return; |
77 | ||
6d58272b PJ |
78 | memcpy (&mpc, pnt + 2, sizeof(struct capability_mp_data)); |
79 | ||
80 | if (hdr->code == CAPABILITY_CODE_MP) | |
718e3744 | 81 | { |
9cabb64b | 82 | afi_t afi; |
83 | safi_t safi; | |
84 | ||
85 | bgp_map_afi_safi_iana2int (ntohs(mpc.afi), mpc.safi, &afi, &safi); | |
856ca177 MS |
86 | if (use_json) |
87 | { | |
9cabb64b | 88 | switch (afi) |
856ca177 MS |
89 | { |
90 | case AFI_IP: | |
91 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolAfi", "IPv4"); | |
92 | break; | |
93 | case AFI_IP6: | |
94 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolAfi", "IPv6"); | |
95 | break; | |
3d6c0dfa PG |
96 | case AFI_L2VPN: |
97 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolAfi", "L2VPN"); | |
98 | break; | |
856ca177 MS |
99 | default: |
100 | json_object_int_add(json_cap, "capabilityErrorMultiProtocolAfiUnknown", ntohs (mpc.afi)); | |
101 | break; | |
102 | } | |
9cabb64b | 103 | switch (safi) |
856ca177 MS |
104 | { |
105 | case SAFI_UNICAST: | |
106 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "unicast"); | |
107 | break; | |
108 | case SAFI_MULTICAST: | |
109 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "multicast"); | |
110 | break; | |
cd1964ff DS |
111 | case SAFI_LABELED_UNICAST: |
112 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "labeled-unicast"); | |
113 | break; | |
9cabb64b | 114 | case SAFI_MPLS_VPN: |
856ca177 MS |
115 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "MPLS-labeled VPN"); |
116 | break; | |
587ff0fd LB |
117 | case SAFI_ENCAP: |
118 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "encap"); | |
119 | break; | |
3d6c0dfa PG |
120 | case SAFI_EVPN: |
121 | json_object_string_add(json_cap, "capabilityErrorMultiProtocolSafi", "EVPN"); | |
122 | break; | |
856ca177 MS |
123 | default: |
124 | json_object_int_add(json_cap, "capabilityErrorMultiProtocolSafiUnknown", mpc.safi); | |
125 | break; | |
126 | } | |
127 | } | |
128 | else | |
129 | { | |
130 | vty_out (vty, " Capability error for: Multi protocol "); | |
9cabb64b | 131 | switch (afi) |
856ca177 MS |
132 | { |
133 | case AFI_IP: | |
134 | vty_out (vty, "AFI IPv4, "); | |
135 | break; | |
136 | case AFI_IP6: | |
137 | vty_out (vty, "AFI IPv6, "); | |
138 | break; | |
3d6c0dfa PG |
139 | case AFI_L2VPN: |
140 | vty_out (vty, "AFI L2VPN, "); | |
141 | break; | |
856ca177 MS |
142 | default: |
143 | vty_out (vty, "AFI Unknown %d, ", ntohs (mpc.afi)); | |
144 | break; | |
145 | } | |
9cabb64b | 146 | switch (safi) |
856ca177 MS |
147 | { |
148 | case SAFI_UNICAST: | |
149 | vty_out (vty, "SAFI Unicast"); | |
150 | break; | |
151 | case SAFI_MULTICAST: | |
152 | vty_out (vty, "SAFI Multicast"); | |
153 | break; | |
cd1964ff DS |
154 | case SAFI_LABELED_UNICAST: |
155 | vty_out (vty, "SAFI Labeled-unicast"); | |
156 | break; | |
9cabb64b | 157 | case SAFI_MPLS_VPN: |
856ca177 MS |
158 | vty_out (vty, "SAFI MPLS-labeled VPN"); |
159 | break; | |
587ff0fd LB |
160 | case SAFI_ENCAP: |
161 | vty_out (vty, "SAFI ENCAP"); | |
162 | break; | |
3d6c0dfa PG |
163 | case SAFI_EVPN: |
164 | vty_out (vty, "SAFI EVPN"); | |
165 | break; | |
856ca177 MS |
166 | default: |
167 | vty_out (vty, "SAFI Unknown %d ", mpc.safi); | |
168 | break; | |
169 | } | |
6d3c2ed4 | 170 | vty_out (vty, "\n"); |
856ca177 MS |
171 | } |
172 | } | |
6d58272b | 173 | else if (hdr->code >= 128) |
856ca177 MS |
174 | { |
175 | if (use_json) | |
176 | json_object_int_add(json_cap, "capabilityErrorVendorSpecificCapabilityCode", hdr->code); | |
177 | else | |
178 | vty_out (vty, " Capability error: vendor specific capability code %d", | |
179 | hdr->code); | |
180 | } | |
718e3744 | 181 | else |
856ca177 MS |
182 | { |
183 | if (use_json) | |
184 | json_object_int_add(json_cap, "capabilityErrorUnknownCapabilityCode", hdr->code); | |
185 | else | |
186 | vty_out (vty, " Capability error: unknown capability code %d", | |
187 | hdr->code); | |
188 | } | |
6d58272b | 189 | pnt += hdr->length + 2; |
718e3744 | 190 | } |
856ca177 MS |
191 | if (use_json) |
192 | json_object_object_add(json_neigh, "capabilityErrors", json_cap); | |
718e3744 | 193 | } |
194 | ||
6d58272b PJ |
195 | static void |
196 | bgp_capability_mp_data (struct stream *s, struct capability_mp_data *mpc) | |
718e3744 | 197 | { |
6d58272b PJ |
198 | mpc->afi = stream_getw (s); |
199 | mpc->reserved = stream_getc (s); | |
200 | mpc->safi = stream_getc (s); | |
201 | } | |
718e3744 | 202 | |
6d58272b PJ |
203 | /* Set negotiated capability value. */ |
204 | static int | |
205 | bgp_capability_mp (struct peer *peer, struct capability_header *hdr) | |
206 | { | |
207 | struct capability_mp_data mpc; | |
208 | struct stream *s = BGP_INPUT (peer); | |
b58ed1f8 DS |
209 | afi_t afi; |
210 | safi_t safi; | |
211 | ||
14051b36 DS |
212 | /* Verify length is 4 */ |
213 | if (hdr->length != 4) | |
214 | { | |
215 | zlog_warn("MP Cap: Received invalid length %d, non-multiple of 4", | |
216 | hdr->length); | |
217 | return -1; | |
218 | } | |
219 | ||
6d58272b PJ |
220 | bgp_capability_mp_data (s, &mpc); |
221 | ||
167d390a | 222 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
223 | zlog_debug ("%s OPEN has MP_EXT CAP for afi/safi: %u/%u", |
224 | peer->host, mpc.afi, mpc.safi); | |
225 | ||
9cabb64b | 226 | /* Convert AFI, SAFI to internal values, check. */ |
b58ed1f8 | 227 | if (bgp_map_afi_safi_iana2int (mpc.afi, mpc.safi, &afi, &safi)) |
6d58272b PJ |
228 | return -1; |
229 | ||
230 | /* Now safi remapped, and afi/safi are valid array indices */ | |
b58ed1f8 | 231 | peer->afc_recv[afi][safi] = 1; |
6d58272b | 232 | |
b58ed1f8 DS |
233 | if (peer->afc[afi][safi]) |
234 | peer->afc_nego[afi][safi] = 1; | |
6d58272b PJ |
235 | else |
236 | return -1; | |
718e3744 | 237 | |
238 | return 0; | |
239 | } | |
240 | ||
94f2b392 | 241 | static void |
b58ed1f8 | 242 | bgp_capability_orf_not_support (struct peer *peer, iana_afi_t afi, safi_t safi, |
718e3744 | 243 | u_char type, u_char mode) |
244 | { | |
16286195 | 245 | if (bgp_debug_neighbor_events(peer)) |
8325cd7f | 246 | zlog_debug ("%s Addr-family %d/%d has ORF type/mode %d/%d not supported", |
718e3744 | 247 | peer->host, afi, safi, type, mode); |
248 | } | |
249 | ||
8f5abac1 | 250 | static const struct message orf_type_str[] = |
6d58272b PJ |
251 | { |
252 | { ORF_TYPE_PREFIX, "Prefixlist" }, | |
253 | { ORF_TYPE_PREFIX_OLD, "Prefixlist (old)" }, | |
56b40679 | 254 | { 0 } |
6d58272b | 255 | }; |
6d58272b | 256 | |
8f5abac1 | 257 | static const struct message orf_mode_str[] = |
6d58272b PJ |
258 | { |
259 | { ORF_MODE_RECEIVE, "Receive" }, | |
260 | { ORF_MODE_SEND, "Send" }, | |
261 | { ORF_MODE_BOTH, "Both" }, | |
56b40679 | 262 | { 0 } |
6d58272b | 263 | }; |
6d58272b | 264 | |
94f2b392 | 265 | static int |
6d58272b | 266 | bgp_capability_orf_entry (struct peer *peer, struct capability_header *hdr) |
718e3744 | 267 | { |
6d58272b | 268 | struct stream *s = BGP_INPUT (peer); |
000fe2ca QY |
269 | struct capability_mp_data mpc; |
270 | u_char num; | |
b58ed1f8 | 271 | iana_afi_t pkt_afi; |
6d58272b | 272 | afi_t afi; |
9cabb64b | 273 | safi_t pkt_safi, safi; |
718e3744 | 274 | u_char type; |
275 | u_char mode; | |
276 | u_int16_t sm_cap = 0; /* capability send-mode receive */ | |
277 | u_int16_t rm_cap = 0; /* capability receive-mode receive */ | |
278 | int i; | |
279 | ||
6d58272b | 280 | /* ORF Entry header */ |
000fe2ca QY |
281 | bgp_capability_mp_data (s, &mpc); |
282 | num = stream_getc (s); | |
283 | pkt_afi = mpc.afi; | |
284 | pkt_safi = mpc.safi; | |
6d58272b | 285 | |
16286195 | 286 | if (bgp_debug_neighbor_events(peer)) |
6d58272b | 287 | zlog_debug ("%s ORF Cap entry for afi/safi: %u/%u", |
000fe2ca | 288 | peer->host, mpc.afi, mpc.safi); |
718e3744 | 289 | |
9cabb64b | 290 | /* Convert AFI, SAFI to internal values, check. */ |
291 | if (bgp_map_afi_safi_iana2int (pkt_afi, pkt_safi, &afi, &safi)) | |
6d58272b PJ |
292 | { |
293 | zlog_info ("%s Addr-family %d/%d not supported." | |
294 | " Ignoring the ORF capability", | |
9cabb64b | 295 | peer->host, pkt_afi, pkt_safi); |
6d58272b PJ |
296 | return 0; |
297 | } | |
298 | ||
000fe2ca QY |
299 | mpc.afi = pkt_afi; |
300 | mpc.safi = safi; | |
9cabb64b | 301 | |
6d58272b | 302 | /* validate number field */ |
000fe2ca | 303 | if (CAPABILITY_CODE_ORF_LEN + (num * 2) > hdr->length) |
718e3744 | 304 | { |
6d58272b PJ |
305 | zlog_info ("%s ORF Capability entry length error," |
306 | " Cap length %u, num %u", | |
000fe2ca | 307 | peer->host, hdr->length, num); |
09825025 | 308 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 309 | return -1; |
310 | } | |
311 | ||
000fe2ca | 312 | for (i = 0 ; i < num ; i++) |
718e3744 | 313 | { |
6d58272b PJ |
314 | type = stream_getc(s); |
315 | mode = stream_getc(s); | |
316 | ||
718e3744 | 317 | /* ORF Mode error check */ |
6d58272b PJ |
318 | switch (mode) |
319 | { | |
320 | case ORF_MODE_BOTH: | |
321 | case ORF_MODE_SEND: | |
322 | case ORF_MODE_RECEIVE: | |
323 | break; | |
324 | default: | |
9cabb64b | 325 | bgp_capability_orf_not_support (peer, pkt_afi, pkt_safi, type, mode); |
6d58272b | 326 | continue; |
718e3744 | 327 | } |
6d58272b PJ |
328 | /* ORF Type and afi/safi error checks */ |
329 | /* capcode versus type */ | |
330 | switch (hdr->code) | |
331 | { | |
332 | case CAPABILITY_CODE_ORF: | |
333 | switch (type) | |
334 | { | |
335 | case ORF_TYPE_PREFIX: | |
336 | break; | |
337 | default: | |
9cabb64b | 338 | bgp_capability_orf_not_support (peer, pkt_afi, pkt_safi, type, mode); |
6d58272b PJ |
339 | continue; |
340 | } | |
341 | break; | |
342 | case CAPABILITY_CODE_ORF_OLD: | |
343 | switch (type) | |
344 | { | |
345 | case ORF_TYPE_PREFIX_OLD: | |
346 | break; | |
347 | default: | |
9cabb64b | 348 | bgp_capability_orf_not_support (peer, pkt_afi, pkt_safi, type, mode); |
6d58272b PJ |
349 | continue; |
350 | } | |
351 | break; | |
352 | default: | |
9cabb64b | 353 | bgp_capability_orf_not_support (peer, pkt_afi, pkt_safi, type, mode); |
6d58272b PJ |
354 | continue; |
355 | } | |
356 | ||
357 | /* AFI vs SAFI */ | |
358 | if (!((afi == AFI_IP && safi == SAFI_UNICAST) | |
359 | || (afi == AFI_IP && safi == SAFI_MULTICAST) | |
360 | || (afi == AFI_IP6 && safi == SAFI_UNICAST))) | |
361 | { | |
9cabb64b | 362 | bgp_capability_orf_not_support (peer, pkt_afi, pkt_safi, type, mode); |
6d58272b PJ |
363 | continue; |
364 | } | |
365 | ||
16286195 | 366 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
367 | zlog_debug ("%s OPEN has %s ORF capability" |
368 | " as %s for afi/safi: %d/%d", | |
56b40679 QY |
369 | peer->host, lookup_msg(orf_type_str, type, NULL), |
370 | lookup_msg(orf_mode_str, mode, NULL), | |
9cabb64b | 371 | pkt_afi, pkt_safi); |
718e3744 | 372 | |
6d58272b | 373 | if (hdr->code == CAPABILITY_CODE_ORF) |
718e3744 | 374 | { |
6d58272b PJ |
375 | sm_cap = PEER_CAP_ORF_PREFIX_SM_RCV; |
376 | rm_cap = PEER_CAP_ORF_PREFIX_RM_RCV; | |
718e3744 | 377 | } |
6d58272b | 378 | else if (hdr->code == CAPABILITY_CODE_ORF_OLD) |
718e3744 | 379 | { |
6d58272b PJ |
380 | sm_cap = PEER_CAP_ORF_PREFIX_SM_OLD_RCV; |
381 | rm_cap = PEER_CAP_ORF_PREFIX_RM_OLD_RCV; | |
718e3744 | 382 | } |
383 | else | |
384 | { | |
9cabb64b | 385 | bgp_capability_orf_not_support (peer, pkt_afi, pkt_safi, type, mode); |
718e3744 | 386 | continue; |
387 | } | |
388 | ||
389 | switch (mode) | |
390 | { | |
391 | case ORF_MODE_BOTH: | |
392 | SET_FLAG (peer->af_cap[afi][safi], sm_cap); | |
393 | SET_FLAG (peer->af_cap[afi][safi], rm_cap); | |
394 | break; | |
395 | case ORF_MODE_SEND: | |
396 | SET_FLAG (peer->af_cap[afi][safi], sm_cap); | |
397 | break; | |
398 | case ORF_MODE_RECEIVE: | |
399 | SET_FLAG (peer->af_cap[afi][safi], rm_cap); | |
400 | break; | |
401 | } | |
402 | } | |
403 | return 0; | |
404 | } | |
405 | ||
6d58272b PJ |
406 | static int |
407 | bgp_capability_restart (struct peer *peer, struct capability_header *caphdr) | |
408 | { | |
409 | struct stream *s = BGP_INPUT (peer); | |
410 | u_int16_t restart_flag_time; | |
6d58272b PJ |
411 | size_t end = stream_get_getp (s) + caphdr->length; |
412 | ||
14051b36 DS |
413 | /* Verify length is a multiple of 4 */ |
414 | if ((caphdr->length-2) % 4) | |
415 | { | |
416 | zlog_warn("Restart Cap: Received invalid length %d, non-multiple of 4", | |
417 | caphdr->length); | |
418 | return -1; | |
419 | } | |
420 | ||
6d58272b PJ |
421 | SET_FLAG (peer->cap, PEER_CAP_RESTART_RCV); |
422 | restart_flag_time = stream_getw(s); | |
423 | if (CHECK_FLAG (restart_flag_time, RESTART_R_BIT)) | |
4b52acf9 PJ |
424 | SET_FLAG (peer->cap, PEER_CAP_RESTART_BIT_RCV); |
425 | ||
6d58272b PJ |
426 | UNSET_FLAG (restart_flag_time, 0xF000); |
427 | peer->v_gr_restart = restart_flag_time; | |
718e3744 | 428 | |
16286195 | 429 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
430 | { |
431 | zlog_debug ("%s OPEN has Graceful Restart capability", peer->host); | |
432 | zlog_debug ("%s Peer has%srestarted. Restart Time : %d", | |
4b52acf9 PJ |
433 | peer->host, |
434 | CHECK_FLAG (peer->cap, PEER_CAP_RESTART_BIT_RCV) ? " " | |
435 | : " not ", | |
6d58272b PJ |
436 | peer->v_gr_restart); |
437 | } | |
718e3744 | 438 | |
21cc7694 | 439 | while (stream_get_getp (s) + 4 <= end) |
6d58272b | 440 | { |
9cabb64b | 441 | afi_t afi; |
442 | safi_t safi; | |
b58ed1f8 | 443 | iana_afi_t pkt_afi = stream_getw (s); |
9cabb64b | 444 | safi_t pkt_safi = stream_getc (s); |
6d58272b PJ |
445 | u_char flag = stream_getc (s); |
446 | ||
9cabb64b | 447 | /* Convert AFI, SAFI to internal values, check. */ |
448 | if (bgp_map_afi_safi_iana2int (pkt_afi, pkt_safi, &afi, &safi)) | |
6d58272b | 449 | { |
16286195 | 450 | if (bgp_debug_neighbor_events(peer)) |
6d58272b | 451 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not supported." |
14051b36 | 452 | " Ignore the Graceful Restart capability for this AFI/SAFI", |
9cabb64b | 453 | peer->host, pkt_afi, pkt_safi); |
6d58272b PJ |
454 | } |
455 | else if (!peer->afc[afi][safi]) | |
456 | { | |
16286195 | 457 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
458 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not enabled." |
459 | " Ignore the Graceful Restart capability", | |
9cabb64b | 460 | peer->host, pkt_afi, pkt_safi); |
6d58272b PJ |
461 | } |
462 | else | |
463 | { | |
16286195 | 464 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
465 | zlog_debug ("%s Address family %s is%spreserved", peer->host, |
466 | afi_safi_print (afi, safi), | |
467 | CHECK_FLAG (peer->af_cap[afi][safi], | |
468 | PEER_CAP_RESTART_AF_PRESERVE_RCV) | |
469 | ? " " : " not "); | |
470 | ||
471 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_RESTART_AF_RCV); | |
472 | if (CHECK_FLAG (flag, RESTART_F_BIT)) | |
473 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_RESTART_AF_PRESERVE_RCV); | |
474 | ||
475 | } | |
476 | } | |
477 | return 0; | |
478 | } | |
718e3744 | 479 | |
14051b36 | 480 | /* Unlike other capability parsing routines, this one returns 0 on error */ |
0b2aa3a0 PJ |
481 | static as_t |
482 | bgp_capability_as4 (struct peer *peer, struct capability_header *hdr) | |
483 | { | |
5861739f PJ |
484 | SET_FLAG (peer->cap, PEER_CAP_AS4_RCV); |
485 | ||
486 | if (hdr->length != CAPABILITY_CODE_AS4_LEN) | |
487 | { | |
488 | zlog_err ("%s AS4 capability has incorrect data length %d", | |
489 | peer->host, hdr->length); | |
490 | return 0; | |
491 | } | |
492 | ||
0b2aa3a0 PJ |
493 | as_t as4 = stream_getl (BGP_INPUT(peer)); |
494 | ||
495 | if (BGP_DEBUG (as4, AS4)) | |
496 | zlog_debug ("%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u", | |
497 | peer->host, as4); | |
0b2aa3a0 PJ |
498 | return as4; |
499 | } | |
500 | ||
a82478b9 DS |
501 | static int |
502 | bgp_capability_addpath (struct peer *peer, struct capability_header *hdr) | |
503 | { | |
504 | struct stream *s = BGP_INPUT (peer); | |
505 | size_t end = stream_get_getp (s) + hdr->length; | |
506 | ||
507 | SET_FLAG (peer->cap, PEER_CAP_ADDPATH_RCV); | |
508 | ||
14051b36 DS |
509 | /* Verify length is a multiple of 4 */ |
510 | if (hdr->length % 4) | |
511 | { | |
512 | zlog_warn("Add Path: Received invalid length %d, non-multiple of 4", | |
513 | hdr->length); | |
514 | return -1; | |
515 | } | |
516 | ||
a82478b9 DS |
517 | while (stream_get_getp (s) + 4 <= end) |
518 | { | |
9cabb64b | 519 | afi_t afi; |
520 | safi_t safi; | |
b58ed1f8 | 521 | iana_afi_t pkt_afi = stream_getw (s); |
9cabb64b | 522 | safi_t pkt_safi = stream_getc (s); |
a82478b9 DS |
523 | u_char send_receive = stream_getc (s); |
524 | ||
167d390a | 525 | if (bgp_debug_neighbor_events(peer)) |
a82478b9 | 526 | zlog_debug ("%s OPEN has AddPath CAP for afi/safi: %u/%u%s%s", |
9cabb64b | 527 | peer->host, pkt_afi, pkt_safi, |
a82478b9 DS |
528 | (send_receive & BGP_ADDPATH_RX) ? ", receive" : "", |
529 | (send_receive & BGP_ADDPATH_TX) ? ", transmit" : ""); | |
530 | ||
9cabb64b | 531 | /* Convert AFI, SAFI to internal values, check. */ |
532 | if (bgp_map_afi_safi_iana2int (pkt_afi, pkt_safi, &afi, &safi)) | |
823b8f7c DS |
533 | { |
534 | if (bgp_debug_neighbor_events(peer)) | |
535 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not supported." | |
536 | " Ignore the Addpath Attribute for this AFI/SAFI", | |
9cabb64b | 537 | peer->host, pkt_afi, pkt_safi); |
823b8f7c DS |
538 | continue; |
539 | } | |
540 | else if (!peer->afc[afi][safi]) | |
541 | { | |
542 | if (bgp_debug_neighbor_events(peer)) | |
543 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not enabled." | |
544 | " Ignore the AddPath capability for this AFI/SAFI", | |
9cabb64b | 545 | peer->host, pkt_afi, pkt_safi); |
823b8f7c DS |
546 | continue; |
547 | } | |
a82478b9 DS |
548 | |
549 | if (send_receive & BGP_ADDPATH_RX) | |
550 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_RCV); | |
551 | ||
552 | if (send_receive & BGP_ADDPATH_TX) | |
553 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_RCV); | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
8a92a8a0 DS |
559 | static int |
560 | bgp_capability_enhe (struct peer *peer, struct capability_header *hdr) | |
561 | { | |
562 | struct stream *s = BGP_INPUT (peer); | |
563 | size_t end = stream_get_getp (s) + hdr->length; | |
564 | ||
14051b36 DS |
565 | /* Verify length is a multiple of 4 */ |
566 | if (hdr->length % 6) | |
567 | { | |
568 | zlog_warn("Extended NH: Received invalid length %d, non-multiple of 6", | |
569 | hdr->length); | |
570 | return -1; | |
571 | } | |
572 | ||
8a92a8a0 DS |
573 | while (stream_get_getp (s) + 6 <= end) |
574 | { | |
b58ed1f8 DS |
575 | iana_afi_t pkt_afi = stream_getw (s); |
576 | afi_t afi; | |
9cabb64b | 577 | safi_t safi, pkt_safi = stream_getw (s); |
b58ed1f8 DS |
578 | iana_afi_t pkt_nh_afi = stream_getw (s); |
579 | afi_t nh_afi; | |
8a92a8a0 DS |
580 | |
581 | if (bgp_debug_neighbor_events(peer)) | |
a656dafa | 582 | zlog_debug ("%s Received with afi/safi/next-hop afi: %u/%u/%u", |
9cabb64b | 583 | peer->host, pkt_afi, pkt_safi, pkt_nh_afi); |
8a92a8a0 | 584 | |
9cabb64b | 585 | /* Convert AFI, SAFI to internal values, check. */ |
586 | if (bgp_map_afi_safi_iana2int (pkt_afi, pkt_safi, &afi, &safi)) | |
8a92a8a0 | 587 | { |
a656dafa | 588 | if (bgp_debug_neighbor_events(peer)) |
589 | zlog_debug ("%s Addr-family %d/%d(afi/safi) not supported." | |
590 | " Ignore the ENHE Attribute for this AFI/SAFI", | |
9cabb64b | 591 | peer->host, pkt_afi, pkt_safi); |
a656dafa | 592 | continue; |
8a92a8a0 DS |
593 | } |
594 | ||
a656dafa | 595 | /* RFC 5549 specifies use of this capability only for IPv4 AFI, with |
596 | * the Nexthop AFI being IPv6. A future spec may introduce other | |
597 | * possibilities, so we ignore other values with a log. Also, only | |
343e90c3 | 598 | * SAFI_UNICAST and SAFI_LABELED_UNICAST are currently supported (and expected). |
a656dafa | 599 | */ |
9cabb64b | 600 | nh_afi = afi_iana2int (pkt_nh_afi); |
601 | ||
343e90c3 | 602 | if (afi != AFI_IP || nh_afi != AFI_IP6 || !(safi == SAFI_UNICAST || safi == SAFI_LABELED_UNICAST)) |
a656dafa | 603 | { |
604 | zlog_warn ("%s Unexpected afi/safi/next-hop afi: %u/%u/%u " | |
605 | "in Extended Next-hop capability, ignoring", | |
9cabb64b | 606 | peer->host, pkt_afi, pkt_safi, pkt_nh_afi); |
a656dafa | 607 | continue; |
608 | } | |
8a92a8a0 DS |
609 | |
610 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV); | |
611 | ||
612 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_ADV)) | |
613 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO); | |
614 | } | |
615 | ||
616 | SET_FLAG (peer->cap, PEER_CAP_ENHE_RCV); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
04b6bdc0 DW |
621 | static int |
622 | bgp_capability_hostname (struct peer *peer, struct capability_header *hdr) | |
623 | { | |
624 | struct stream *s = BGP_INPUT (peer); | |
625 | char str[BGP_MAX_HOSTNAME+1]; | |
626 | size_t end = stream_get_getp (s) + hdr->length; | |
627 | u_char len; | |
628 | ||
629 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_RCV); | |
630 | ||
631 | len = stream_getc(s); | |
632 | if (stream_get_getp(s) + len > end) | |
633 | { | |
634 | zlog_warn("%s: Received malformed hostname capability from peer %s", | |
635 | __FUNCTION__, peer->host); | |
636 | return -1; | |
637 | } | |
638 | ||
639 | if (len > BGP_MAX_HOSTNAME) | |
640 | { | |
641 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
642 | stream_forward_getp(s, len-BGP_MAX_HOSTNAME); | |
643 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
644 | } | |
645 | else if (len) | |
646 | stream_get(str, s, len); | |
647 | ||
648 | if (len) | |
649 | { | |
650 | str[len] = '\0'; | |
651 | ||
652 | if (peer->hostname != NULL) | |
f9e9e073 | 653 | { |
4a1ab8e4 | 654 | XFREE(MTYPE_BGP_PEER_HOST, peer->hostname); |
f9e9e073 DW |
655 | peer->hostname = NULL; |
656 | } | |
04b6bdc0 DW |
657 | |
658 | if (peer->domainname != NULL) | |
9e08021c | 659 | { |
4a1ab8e4 | 660 | XFREE(MTYPE_BGP_PEER_HOST, peer->domainname); |
9e08021c DW |
661 | peer->domainname = NULL; |
662 | } | |
04b6bdc0 | 663 | |
4a1ab8e4 | 664 | peer->hostname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); |
04b6bdc0 DW |
665 | } |
666 | ||
667 | if (stream_get_getp(s) +1 > end) | |
668 | { | |
669 | zlog_warn("%s: Received invalid domain name len (hostname capability) from peer %s", | |
670 | __FUNCTION__, peer->host); | |
671 | return -1; | |
672 | } | |
673 | ||
674 | len = stream_getc(s); | |
675 | if (stream_get_getp(s) + len > end) | |
676 | { | |
677 | zlog_warn("%s: Received runt domain name (hostname capability) from peer %s", | |
678 | __FUNCTION__, peer->host); | |
679 | return -1; | |
680 | } | |
681 | ||
682 | if (len > BGP_MAX_HOSTNAME) | |
683 | { | |
684 | stream_get(str, s, BGP_MAX_HOSTNAME); | |
685 | stream_forward_getp(s, len-BGP_MAX_HOSTNAME); | |
686 | len = BGP_MAX_HOSTNAME; /* to set the '\0' below */ | |
687 | } | |
688 | else if (len) | |
689 | stream_get(str, s, len); | |
690 | ||
691 | if (len) | |
692 | { | |
693 | str[len] = '\0'; | |
4a1ab8e4 | 694 | peer->domainname = XSTRDUP(MTYPE_BGP_PEER_HOST, str); |
04b6bdc0 DW |
695 | } |
696 | ||
697 | if (bgp_debug_neighbor_events(peer)) | |
698 | { | |
699 | zlog_debug("%s received hostname %s, domainname %s", | |
700 | peer->host, peer->hostname, peer->domainname); | |
701 | } | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
6410e93a | 706 | static const struct message capcode_str[] = |
6d58272b | 707 | { |
6d58272b PJ |
708 | { CAPABILITY_CODE_MP, "MultiProtocol Extensions" }, |
709 | { CAPABILITY_CODE_REFRESH, "Route Refresh" }, | |
710 | { CAPABILITY_CODE_ORF, "Cooperative Route Filtering" }, | |
711 | { CAPABILITY_CODE_RESTART, "Graceful Restart" }, | |
712 | { CAPABILITY_CODE_AS4, "4-octet AS number" }, | |
89eeecb8 | 713 | { CAPABILITY_CODE_ADDPATH, "AddPath" }, |
6d58272b | 714 | { CAPABILITY_CODE_DYNAMIC, "Dynamic" }, |
8a92a8a0 | 715 | { CAPABILITY_CODE_ENHE, "Extended Next Hop Encoding" }, |
89eeecb8 | 716 | { CAPABILITY_CODE_DYNAMIC_OLD, "Dynamic (Old)" }, |
6d58272b PJ |
717 | { CAPABILITY_CODE_REFRESH_OLD, "Route Refresh (Old)" }, |
718 | { CAPABILITY_CODE_ORF_OLD, "ORF (Old)" }, | |
56b40679 QY |
719 | { CAPABILITY_CODE_FQDN, "FQDN" }, |
720 | { 0 } | |
6d58272b | 721 | }; |
6d58272b PJ |
722 | |
723 | /* Minimum sizes for length field of each cap (so not inc. the header) */ | |
fc52f953 | 724 | static const size_t cap_minsizes[] = |
6d58272b | 725 | { |
e978e1de | 726 | [CAPABILITY_CODE_MP] = CAPABILITY_CODE_MP_LEN, |
6d58272b | 727 | [CAPABILITY_CODE_REFRESH] = CAPABILITY_CODE_REFRESH_LEN, |
e978e1de | 728 | [CAPABILITY_CODE_ORF] = CAPABILITY_CODE_ORF_LEN, |
f5bb8cfa | 729 | [CAPABILITY_CODE_RESTART] = CAPABILITY_CODE_RESTART_LEN, |
6d58272b | 730 | [CAPABILITY_CODE_AS4] = CAPABILITY_CODE_AS4_LEN, |
a82478b9 | 731 | [CAPABILITY_CODE_ADDPATH] = CAPABILITY_CODE_ADDPATH_LEN, |
6d58272b | 732 | [CAPABILITY_CODE_DYNAMIC] = CAPABILITY_CODE_DYNAMIC_LEN, |
89eeecb8 | 733 | [CAPABILITY_CODE_DYNAMIC_OLD] = CAPABILITY_CODE_DYNAMIC_LEN, |
8a92a8a0 | 734 | [CAPABILITY_CODE_ENHE] = CAPABILITY_CODE_ENHE_LEN, |
6d58272b | 735 | [CAPABILITY_CODE_REFRESH_OLD] = CAPABILITY_CODE_REFRESH_LEN, |
e978e1de | 736 | [CAPABILITY_CODE_ORF_OLD] = CAPABILITY_CODE_ORF_LEN, |
04b6bdc0 | 737 | [CAPABILITY_CODE_FQDN] = CAPABILITY_CODE_MIN_FQDN_LEN, |
6d58272b PJ |
738 | }; |
739 | ||
695ef95f PJ |
740 | /* value the capability must be a multiple of. |
741 | * 0-data capabilities won't be checked against this. | |
742 | * Other capabilities whose data doesn't fall on convenient boundaries for this | |
743 | * table should be set to 1. | |
744 | */ | |
745 | static const size_t cap_modsizes[] = | |
746 | { | |
747 | [CAPABILITY_CODE_MP] = 4, | |
748 | [CAPABILITY_CODE_REFRESH] = 1, | |
749 | [CAPABILITY_CODE_ORF] = 1, | |
750 | [CAPABILITY_CODE_RESTART] = 1, | |
751 | [CAPABILITY_CODE_AS4] = 4, | |
934a4c59 | 752 | [CAPABILITY_CODE_ADDPATH] = 4, |
695ef95f | 753 | [CAPABILITY_CODE_DYNAMIC] = 1, |
934a4c59 DS |
754 | [CAPABILITY_CODE_DYNAMIC_OLD] = 1, |
755 | [CAPABILITY_CODE_ENHE] = 6, | |
695ef95f PJ |
756 | [CAPABILITY_CODE_REFRESH_OLD] = 1, |
757 | [CAPABILITY_CODE_ORF_OLD] = 1, | |
934a4c59 | 758 | [CAPABILITY_CODE_FQDN] = 1, |
695ef95f PJ |
759 | }; |
760 | ||
3b381c32 AS |
761 | /** |
762 | * Parse given capability. | |
6d58272b | 763 | * XXX: This is reading into a stream, but not using stream API |
3b381c32 AS |
764 | * |
765 | * @param[out] mp_capability Set to 1 on return iff one or more Multiprotocol | |
766 | * capabilities were encountered. | |
6d58272b PJ |
767 | */ |
768 | static int | |
3b381c32 AS |
769 | bgp_capability_parse (struct peer *peer, size_t length, int *mp_capability, |
770 | u_char **error) | |
6d58272b PJ |
771 | { |
772 | int ret; | |
773 | struct stream *s = BGP_INPUT (peer); | |
774 | size_t end = stream_get_getp (s) + length; | |
775 | ||
776 | assert (STREAM_READABLE (s) >= length); | |
777 | ||
778 | while (stream_get_getp (s) < end) | |
779 | { | |
780 | size_t start; | |
781 | u_char *sp = stream_pnt (s); | |
782 | struct capability_header caphdr; | |
14051b36 DS |
783 | |
784 | ret = 0; | |
718e3744 | 785 | /* We need at least capability code and capability length. */ |
6d58272b | 786 | if (stream_get_getp(s) + 2 > end) |
718e3744 | 787 | { |
6d58272b | 788 | zlog_info ("%s Capability length error (< header)", peer->host); |
09825025 | 789 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 790 | return -1; |
791 | } | |
6d58272b PJ |
792 | |
793 | caphdr.code = stream_getc (s); | |
794 | caphdr.length = stream_getc (s); | |
795 | start = stream_get_getp (s); | |
796 | ||
797 | /* Capability length check sanity check. */ | |
798 | if (start + caphdr.length > end) | |
718e3744 | 799 | { |
6d58272b | 800 | zlog_info ("%s Capability length error (< length)", peer->host); |
09825025 | 801 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 802 | return -1; |
803 | } | |
6d58272b | 804 | |
16286195 | 805 | if (bgp_debug_neighbor_events(peer)) |
6d58272b PJ |
806 | zlog_debug ("%s OPEN has %s capability (%u), length %u", |
807 | peer->host, | |
56b40679 | 808 | lookup_msg(capcode_str, caphdr.code, NULL), |
6d58272b PJ |
809 | caphdr.code, caphdr.length); |
810 | ||
811 | /* Length sanity check, type-specific, for known capabilities */ | |
812 | switch (caphdr.code) | |
813 | { | |
814 | case CAPABILITY_CODE_MP: | |
815 | case CAPABILITY_CODE_REFRESH: | |
816 | case CAPABILITY_CODE_REFRESH_OLD: | |
817 | case CAPABILITY_CODE_ORF: | |
818 | case CAPABILITY_CODE_ORF_OLD: | |
819 | case CAPABILITY_CODE_RESTART: | |
0b2aa3a0 | 820 | case CAPABILITY_CODE_AS4: |
a82478b9 | 821 | case CAPABILITY_CODE_ADDPATH: |
6d58272b | 822 | case CAPABILITY_CODE_DYNAMIC: |
89eeecb8 | 823 | case CAPABILITY_CODE_DYNAMIC_OLD: |
8a92a8a0 | 824 | case CAPABILITY_CODE_ENHE: |
04b6bdc0 | 825 | case CAPABILITY_CODE_FQDN: |
6d58272b PJ |
826 | /* Check length. */ |
827 | if (caphdr.length < cap_minsizes[caphdr.code]) | |
828 | { | |
829 | zlog_info ("%s %s Capability length error: got %u," | |
830 | " expected at least %u", | |
831 | peer->host, | |
56b40679 | 832 | lookup_msg(capcode_str, caphdr.code, NULL), |
fc52f953 SH |
833 | caphdr.length, |
834 | (unsigned) cap_minsizes[caphdr.code]); | |
09825025 | 835 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
6d58272b PJ |
836 | return -1; |
837 | } | |
695ef95f PJ |
838 | if (caphdr.length |
839 | && caphdr.length % cap_modsizes[caphdr.code] != 0) | |
840 | { | |
841 | zlog_info ("%s %s Capability length error: got %u," | |
842 | " expected a multiple of %u", | |
843 | peer->host, | |
56b40679 | 844 | lookup_msg(capcode_str, caphdr.code, NULL), |
695ef95f PJ |
845 | caphdr.length, |
846 | (unsigned) cap_modsizes[caphdr.code]); | |
847 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, | |
92c92c45 | 848 | BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
695ef95f PJ |
849 | return -1; |
850 | } | |
6d58272b PJ |
851 | /* we deliberately ignore unknown codes, see below */ |
852 | default: | |
853 | break; | |
854 | } | |
855 | ||
856 | switch (caphdr.code) | |
857 | { | |
858 | case CAPABILITY_CODE_MP: | |
859 | { | |
3b381c32 AS |
860 | *mp_capability = 1; |
861 | ||
6d58272b PJ |
862 | /* Ignore capability when override-capability is set. */ |
863 | if (! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) | |
864 | { | |
865 | /* Set negotiated value. */ | |
866 | ret = bgp_capability_mp (peer, &caphdr); | |
867 | ||
868 | /* Unsupported Capability. */ | |
869 | if (ret < 0) | |
870 | { | |
871 | /* Store return data. */ | |
872 | memcpy (*error, sp, caphdr.length + 2); | |
873 | *error += caphdr.length + 2; | |
874 | } | |
14051b36 | 875 | ret = 0; /* Don't return error for this */ |
6d58272b PJ |
876 | } |
877 | } | |
878 | break; | |
879 | case CAPABILITY_CODE_REFRESH: | |
880 | case CAPABILITY_CODE_REFRESH_OLD: | |
881 | { | |
882 | /* BGP refresh capability */ | |
883 | if (caphdr.code == CAPABILITY_CODE_REFRESH_OLD) | |
884 | SET_FLAG (peer->cap, PEER_CAP_REFRESH_OLD_RCV); | |
885 | else | |
886 | SET_FLAG (peer->cap, PEER_CAP_REFRESH_NEW_RCV); | |
887 | } | |
888 | break; | |
889 | case CAPABILITY_CODE_ORF: | |
890 | case CAPABILITY_CODE_ORF_OLD: | |
14051b36 | 891 | ret = bgp_capability_orf_entry (peer, &caphdr); |
6d58272b PJ |
892 | break; |
893 | case CAPABILITY_CODE_RESTART: | |
14051b36 | 894 | ret = bgp_capability_restart (peer, &caphdr); |
6d58272b PJ |
895 | break; |
896 | case CAPABILITY_CODE_DYNAMIC: | |
89eeecb8 | 897 | case CAPABILITY_CODE_DYNAMIC_OLD: |
6d58272b PJ |
898 | SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_RCV); |
899 | break; | |
0b2aa3a0 PJ |
900 | case CAPABILITY_CODE_AS4: |
901 | /* Already handled as a special-case parsing of the capabilities | |
902 | * at the beginning of OPEN processing. So we care not a jot | |
903 | * for the value really, only error case. | |
904 | */ | |
905 | if (!bgp_capability_as4 (peer, &caphdr)) | |
14051b36 | 906 | ret = -1; |
0b2aa3a0 | 907 | break; |
a82478b9 | 908 | case CAPABILITY_CODE_ADDPATH: |
14051b36 | 909 | ret = bgp_capability_addpath (peer, &caphdr); |
a82478b9 | 910 | break; |
8a92a8a0 | 911 | case CAPABILITY_CODE_ENHE: |
14051b36 | 912 | ret = bgp_capability_enhe (peer, &caphdr); |
8a92a8a0 | 913 | break; |
04b6bdc0 DW |
914 | case CAPABILITY_CODE_FQDN: |
915 | ret = bgp_capability_hostname (peer, &caphdr); | |
916 | break; | |
6d58272b PJ |
917 | default: |
918 | if (caphdr.code > 128) | |
919 | { | |
920 | /* We don't send Notification for unknown vendor specific | |
921 | capabilities. It seems reasonable for now... */ | |
922 | zlog_warn ("%s Vendor specific capability %d", | |
923 | peer->host, caphdr.code); | |
924 | } | |
925 | else | |
926 | { | |
927 | zlog_warn ("%s unrecognized capability code: %d - ignored", | |
928 | peer->host, caphdr.code); | |
929 | memcpy (*error, sp, caphdr.length + 2); | |
930 | *error += caphdr.length + 2; | |
931 | } | |
932 | } | |
14051b36 DS |
933 | |
934 | if (ret < 0) | |
935 | { | |
09825025 | 936 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
14051b36 DS |
937 | return -1; |
938 | } | |
6d58272b PJ |
939 | if (stream_get_getp(s) != (start + caphdr.length)) |
940 | { | |
941 | if (stream_get_getp(s) > (start + caphdr.length)) | |
942 | zlog_warn ("%s Cap-parser for %s read past cap-length, %u!", | |
56b40679 | 943 | peer->host, lookup_msg(capcode_str, caphdr.code, NULL), |
6d58272b PJ |
944 | caphdr.length); |
945 | stream_set_getp (s, start + caphdr.length); | |
946 | } | |
718e3744 | 947 | } |
948 | return 0; | |
949 | } | |
950 | ||
94f2b392 | 951 | static int |
6d58272b | 952 | bgp_auth_parse (struct peer *peer, size_t length) |
718e3744 | 953 | { |
954 | bgp_notify_send (peer, | |
955 | BGP_NOTIFY_OPEN_ERR, | |
956 | BGP_NOTIFY_OPEN_AUTH_FAILURE); | |
957 | return -1; | |
958 | } | |
959 | ||
94f2b392 | 960 | static int |
718e3744 | 961 | strict_capability_same (struct peer *peer) |
962 | { | |
963 | int i, j; | |
964 | ||
965 | for (i = AFI_IP; i < AFI_MAX; i++) | |
966 | for (j = SAFI_UNICAST; j < SAFI_MAX; j++) | |
967 | if (peer->afc[i][j] != peer->afc_nego[i][j]) | |
968 | return 0; | |
969 | return 1; | |
970 | } | |
971 | ||
0b2aa3a0 PJ |
972 | /* peek into option, stores ASN to *as4 if the AS4 capability was found. |
973 | * Returns 0 if no as4 found, as4cap value otherwise. | |
974 | */ | |
975 | as_t | |
976 | peek_for_as4_capability (struct peer *peer, u_char length) | |
977 | { | |
978 | struct stream *s = BGP_INPUT (peer); | |
979 | size_t orig_getp = stream_get_getp (s); | |
980 | size_t end = orig_getp + length; | |
981 | as_t as4 = 0; | |
982 | ||
0b2aa3a0 PJ |
983 | if (BGP_DEBUG (as4, AS4)) |
984 | zlog_info ("%s [AS4] rcv OPEN w/ OPTION parameter len: %u," | |
985 | " peeking for as4", | |
986 | peer->host, length); | |
987 | /* the error cases we DONT handle, we ONLY try to read as4 out of | |
988 | * correctly formatted options. | |
989 | */ | |
990 | while (stream_get_getp(s) < end) | |
991 | { | |
992 | u_char opt_type; | |
993 | u_char opt_length; | |
994 | ||
995 | /* Check the length. */ | |
996 | if (stream_get_getp (s) + 2 > end) | |
997 | goto end; | |
998 | ||
999 | /* Fetch option type and length. */ | |
1000 | opt_type = stream_getc (s); | |
1001 | opt_length = stream_getc (s); | |
1002 | ||
1003 | /* Option length check. */ | |
1004 | if (stream_get_getp (s) + opt_length > end) | |
1005 | goto end; | |
1006 | ||
1007 | if (opt_type == BGP_OPEN_OPT_CAP) | |
1008 | { | |
1009 | unsigned long capd_start = stream_get_getp (s); | |
1010 | unsigned long capd_end = capd_start + opt_length; | |
1011 | ||
1012 | assert (capd_end <= end); | |
1013 | ||
1014 | while (stream_get_getp (s) < capd_end) | |
1015 | { | |
1016 | struct capability_header hdr; | |
1017 | ||
1018 | if (stream_get_getp (s) + 2 > capd_end) | |
1019 | goto end; | |
1020 | ||
1021 | hdr.code = stream_getc (s); | |
1022 | hdr.length = stream_getc (s); | |
1023 | ||
1024 | if ((stream_get_getp(s) + hdr.length) > capd_end) | |
1025 | goto end; | |
1026 | ||
1027 | if (hdr.code == CAPABILITY_CODE_AS4) | |
1028 | { | |
0b2aa3a0 PJ |
1029 | if (BGP_DEBUG (as4, AS4)) |
1030 | zlog_info ("[AS4] found AS4 capability, about to parse"); | |
1031 | as4 = bgp_capability_as4 (peer, &hdr); | |
1032 | ||
1033 | goto end; | |
1034 | } | |
1035 | stream_forward_getp (s, hdr.length); | |
1036 | } | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | end: | |
1041 | stream_set_getp (s, orig_getp); | |
1042 | return as4; | |
1043 | } | |
1044 | ||
3b381c32 AS |
1045 | /** |
1046 | * Parse open option. | |
1047 | * | |
1048 | * @param[out] mp_capability @see bgp_capability_parse() for semantics. | |
1049 | */ | |
718e3744 | 1050 | int |
3b381c32 | 1051 | bgp_open_option_parse (struct peer *peer, u_char length, int *mp_capability) |
718e3744 | 1052 | { |
18f1dc06 | 1053 | int ret = 0; |
718e3744 | 1054 | u_char *error; |
1055 | u_char error_data[BGP_MAX_PACKET_SIZE]; | |
6d58272b PJ |
1056 | struct stream *s = BGP_INPUT(peer); |
1057 | size_t end = stream_get_getp (s) + length; | |
718e3744 | 1058 | |
718e3744 | 1059 | error = error_data; |
1060 | ||
16286195 | 1061 | if (bgp_debug_neighbor_events(peer)) |
8325cd7f | 1062 | zlog_debug ("%s rcv OPEN w/ OPTION parameter len: %u", |
718e3744 | 1063 | peer->host, length); |
1064 | ||
6d58272b | 1065 | while (stream_get_getp(s) < end) |
718e3744 | 1066 | { |
6d58272b PJ |
1067 | u_char opt_type; |
1068 | u_char opt_length; | |
1069 | ||
1070 | /* Must have at least an OPEN option header */ | |
1071 | if (STREAM_READABLE(s) < 2) | |
718e3744 | 1072 | { |
1073 | zlog_info ("%s Option length error", peer->host); | |
09825025 | 1074 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 1075 | return -1; |
1076 | } | |
1077 | ||
1078 | /* Fetch option type and length. */ | |
6d58272b PJ |
1079 | opt_type = stream_getc (s); |
1080 | opt_length = stream_getc (s); | |
718e3744 | 1081 | |
1082 | /* Option length check. */ | |
6d58272b | 1083 | if (STREAM_READABLE (s) < opt_length) |
718e3744 | 1084 | { |
1085 | zlog_info ("%s Option length error", peer->host); | |
09825025 | 1086 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, BGP_NOTIFY_OPEN_MALFORMED_ATTR); |
718e3744 | 1087 | return -1; |
1088 | } | |
1089 | ||
16286195 | 1090 | if (bgp_debug_neighbor_events(peer)) |
8325cd7f | 1091 | zlog_debug ("%s rcvd OPEN w/ optional parameter type %u (%s) len %u", |
718e3744 | 1092 | peer->host, opt_type, |
1093 | opt_type == BGP_OPEN_OPT_AUTH ? "Authentication" : | |
1094 | opt_type == BGP_OPEN_OPT_CAP ? "Capability" : "Unknown", | |
1095 | opt_length); | |
1096 | ||
1097 | switch (opt_type) | |
1098 | { | |
1099 | case BGP_OPEN_OPT_AUTH: | |
6d58272b | 1100 | ret = bgp_auth_parse (peer, opt_length); |
718e3744 | 1101 | break; |
1102 | case BGP_OPEN_OPT_CAP: | |
3b381c32 | 1103 | ret = bgp_capability_parse (peer, opt_length, mp_capability, &error); |
718e3744 | 1104 | break; |
1105 | default: | |
1106 | bgp_notify_send (peer, | |
1107 | BGP_NOTIFY_OPEN_ERR, | |
1108 | BGP_NOTIFY_OPEN_UNSUP_PARAM); | |
1109 | ret = -1; | |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | /* Parse error. To accumulate all unsupported capability codes, | |
1114 | bgp_capability_parse does not return -1 when encounter | |
1115 | unsupported capability code. To detect that, please check | |
1116 | error and erro_data pointer, like below. */ | |
1117 | if (ret < 0) | |
1118 | return -1; | |
718e3744 | 1119 | } |
1120 | ||
1121 | /* All OPEN option is parsed. Check capability when strict compare | |
1122 | flag is enabled.*/ | |
1123 | if (CHECK_FLAG (peer->flags, PEER_FLAG_STRICT_CAP_MATCH)) | |
1124 | { | |
1125 | /* If Unsupported Capability exists. */ | |
1126 | if (error != error_data) | |
1127 | { | |
1128 | bgp_notify_send_with_data (peer, | |
1129 | BGP_NOTIFY_OPEN_ERR, | |
1130 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1131 | error_data, error - error_data); | |
1132 | return -1; | |
1133 | } | |
1134 | ||
1135 | /* Check local capability does not negotiated with remote | |
1136 | peer. */ | |
1137 | if (! strict_capability_same (peer)) | |
1138 | { | |
1139 | bgp_notify_send (peer, | |
1140 | BGP_NOTIFY_OPEN_ERR, | |
1141 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1142 | return -1; | |
1143 | } | |
1144 | } | |
1145 | ||
3b381c32 | 1146 | /* Check there are no common AFI/SAFIs and send Unsupported Capability |
718e3744 | 1147 | error. */ |
3b381c32 AS |
1148 | if (*mp_capability && |
1149 | ! CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) | |
718e3744 | 1150 | { |
1151 | if (! peer->afc_nego[AFI_IP][SAFI_UNICAST] | |
1152 | && ! peer->afc_nego[AFI_IP][SAFI_MULTICAST] | |
cd1964ff | 1153 | && ! peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST] |
718e3744 | 1154 | && ! peer->afc_nego[AFI_IP][SAFI_MPLS_VPN] |
587ff0fd | 1155 | && ! peer->afc_nego[AFI_IP][SAFI_ENCAP] |
718e3744 | 1156 | && ! peer->afc_nego[AFI_IP6][SAFI_UNICAST] |
945c8fe9 | 1157 | && ! peer->afc_nego[AFI_IP6][SAFI_MULTICAST] |
cd1964ff | 1158 | && ! peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST] |
587ff0fd | 1159 | && ! peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN] |
3d6c0dfa PG |
1160 | && ! peer->afc_nego[AFI_IP6][SAFI_ENCAP] |
1161 | && ! peer->afc_nego[AFI_L2VPN][SAFI_EVPN]) | |
718e3744 | 1162 | { |
16286195 | 1163 | zlog_err ("%s [Error] Configured AFI/SAFIs do not " |
3b381c32 AS |
1164 | "overlap with received MP capabilities", |
1165 | peer->host); | |
718e3744 | 1166 | |
1167 | if (error != error_data) | |
718e3744 | 1168 | bgp_notify_send_with_data (peer, |
1169 | BGP_NOTIFY_OPEN_ERR, | |
1170 | BGP_NOTIFY_OPEN_UNSUP_CAPBL, | |
1171 | error_data, error - error_data); | |
1172 | else | |
1173 | bgp_notify_send (peer, | |
1174 | BGP_NOTIFY_OPEN_ERR, | |
1175 | BGP_NOTIFY_OPEN_UNSUP_CAPBL); | |
1176 | return -1; | |
1177 | } | |
1178 | } | |
1179 | return 0; | |
1180 | } | |
1181 | ||
94f2b392 | 1182 | static void |
718e3744 | 1183 | bgp_open_capability_orf (struct stream *s, struct peer *peer, |
1184 | afi_t afi, safi_t safi, u_char code) | |
1185 | { | |
1186 | u_char cap_len; | |
1187 | u_char orf_len; | |
1188 | unsigned long capp; | |
1189 | unsigned long orfp; | |
1190 | unsigned long numberp; | |
1191 | int number_of_orfs = 0; | |
b58ed1f8 | 1192 | iana_afi_t pkt_afi; |
9cabb64b | 1193 | safi_t pkt_safi; |
718e3744 | 1194 | |
9cabb64b | 1195 | /* Convert AFI, SAFI to values for packet. */ |
1196 | bgp_map_afi_safi_int2iana (afi, safi, &pkt_afi, &pkt_safi); | |
718e3744 | 1197 | |
1198 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
9985f83c | 1199 | capp = stream_get_endp (s); /* Set Capability Len Pointer */ |
718e3744 | 1200 | stream_putc (s, 0); /* Capability Length */ |
1201 | stream_putc (s, code); /* Capability Code */ | |
9985f83c | 1202 | orfp = stream_get_endp (s); /* Set ORF Len Pointer */ |
718e3744 | 1203 | stream_putc (s, 0); /* ORF Length */ |
9cabb64b | 1204 | stream_putw (s, pkt_afi); |
718e3744 | 1205 | stream_putc (s, 0); |
9cabb64b | 1206 | stream_putc (s, pkt_safi); |
9985f83c | 1207 | numberp = stream_get_endp (s); /* Set Number Pointer */ |
718e3744 | 1208 | stream_putc (s, 0); /* Number of ORFs */ |
1209 | ||
1210 | /* Address Prefix ORF */ | |
1211 | if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1212 | || CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) | |
1213 | { | |
1214 | stream_putc (s, (code == CAPABILITY_CODE_ORF ? | |
1215 | ORF_TYPE_PREFIX : ORF_TYPE_PREFIX_OLD)); | |
1216 | ||
1217 | if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1218 | && CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) | |
1219 | { | |
1220 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV); | |
1221 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV); | |
1222 | stream_putc (s, ORF_MODE_BOTH); | |
1223 | } | |
1224 | else if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM)) | |
1225 | { | |
1226 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV); | |
1227 | stream_putc (s, ORF_MODE_SEND); | |
1228 | } | |
1229 | else | |
1230 | { | |
1231 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV); | |
1232 | stream_putc (s, ORF_MODE_RECEIVE); | |
1233 | } | |
1234 | number_of_orfs++; | |
1235 | } | |
1236 | ||
1237 | /* Total Number of ORFs. */ | |
1238 | stream_putc_at (s, numberp, number_of_orfs); | |
1239 | ||
1240 | /* Total ORF Len. */ | |
9985f83c | 1241 | orf_len = stream_get_endp (s) - orfp - 1; |
718e3744 | 1242 | stream_putc_at (s, orfp, orf_len); |
1243 | ||
1244 | /* Total Capability Len. */ | |
9985f83c | 1245 | cap_len = stream_get_endp (s) - capp - 1; |
718e3744 | 1246 | stream_putc_at (s, capp, cap_len); |
1247 | } | |
1248 | ||
1249 | /* Fill in capability open option to the packet. */ | |
1250 | void | |
1251 | bgp_open_capability (struct stream *s, struct peer *peer) | |
1252 | { | |
1253 | u_char len; | |
fe7d2a48 | 1254 | unsigned long cp, capp, rcapp; |
b58ed1f8 | 1255 | iana_afi_t pkt_afi; |
718e3744 | 1256 | afi_t afi; |
9cabb64b | 1257 | safi_t safi, pkt_safi; |
0b2aa3a0 | 1258 | as_t local_as; |
fe7d2a48 | 1259 | u_int32_t restart_time; |
a82478b9 | 1260 | u_char afi_safi_count = 0; |
04b6bdc0 | 1261 | struct utsname names; |
adbac85e | 1262 | int adv_addpath_tx = 0; |
718e3744 | 1263 | |
1264 | /* Remember current pointer for Opt Parm Len. */ | |
9985f83c | 1265 | cp = stream_get_endp (s); |
718e3744 | 1266 | |
1267 | /* Opt Parm Len. */ | |
1268 | stream_putc (s, 0); | |
1269 | ||
1270 | /* Do not send capability. */ | |
1271 | if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN) | |
1272 | || CHECK_FLAG (peer->flags, PEER_FLAG_DONT_CAPABILITY)) | |
1273 | return; | |
1274 | ||
9cabb64b | 1275 | /* MP capability for configured AFI, SAFI */ |
1276 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
1277 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1278 | { | |
1279 | if (peer->afc[afi][safi]) | |
1280 | { | |
1281 | /* Convert AFI, SAFI to values for packet. */ | |
1282 | bgp_map_afi_safi_int2iana (afi, safi, &pkt_afi, &pkt_safi); | |
1283 | ||
1284 | peer->afc_adv[afi][safi] = 1; | |
1285 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1286 | stream_putc (s, CAPABILITY_CODE_MP_LEN + 2); | |
1287 | stream_putc (s, CAPABILITY_CODE_MP); | |
1288 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1289 | stream_putw (s, pkt_afi); | |
1290 | stream_putc (s, 0); | |
1291 | stream_putc (s, pkt_safi); | |
343e90c3 DW |
1292 | |
1293 | /* Extended nexthop capability - currently supporting RFC-5549 for | |
1294 | * Link-Local peering only | |
1295 | */ | |
1296 | if (CHECK_FLAG (peer->flags, PEER_FLAG_CAPABILITY_ENHE) && | |
1297 | peer->su.sa.sa_family == AF_INET6 && | |
1298 | IN6_IS_ADDR_LINKLOCAL(&peer->su.sin6.sin6_addr) && | |
1299 | afi == AFI_IP && | |
1300 | (safi == SAFI_UNICAST || safi == SAFI_LABELED_UNICAST)) | |
1301 | { | |
1302 | /* RFC 5549 Extended Next Hop Encoding */ | |
1303 | SET_FLAG (peer->cap, PEER_CAP_ENHE_ADV); | |
1304 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1305 | stream_putc (s, CAPABILITY_CODE_ENHE_LEN + 2); | |
1306 | stream_putc (s, CAPABILITY_CODE_ENHE); | |
1307 | stream_putc (s, CAPABILITY_CODE_ENHE_LEN); | |
1308 | ||
1309 | SET_FLAG (peer->af_cap[AFI_IP][safi], PEER_CAP_ENHE_AF_ADV); | |
1310 | stream_putw (s, pkt_afi); | |
1311 | stream_putw (s, pkt_safi); | |
1312 | stream_putw (s, afi_int2iana(AFI_IP6)); | |
1313 | ||
1314 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_RCV)) | |
1315 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO); | |
1316 | } | |
9cabb64b | 1317 | } |
1318 | } | |
1319 | ||
718e3744 | 1320 | /* Route refresh. */ |
c9502438 | 1321 | SET_FLAG (peer->cap, PEER_CAP_REFRESH_ADV); |
1322 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1323 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1324 | stream_putc (s, CAPABILITY_CODE_REFRESH_OLD); | |
1325 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN); | |
1326 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1327 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN + 2); | |
1328 | stream_putc (s, CAPABILITY_CODE_REFRESH); | |
1329 | stream_putc (s, CAPABILITY_CODE_REFRESH_LEN); | |
718e3744 | 1330 | |
0b2aa3a0 PJ |
1331 | /* AS4 */ |
1332 | SET_FLAG (peer->cap, PEER_CAP_AS4_ADV); | |
1333 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1334 | stream_putc (s, CAPABILITY_CODE_AS4_LEN + 2); | |
1335 | stream_putc (s, CAPABILITY_CODE_AS4); | |
1336 | stream_putc (s, CAPABILITY_CODE_AS4_LEN); | |
1337 | if ( peer->change_local_as ) | |
1338 | local_as = peer->change_local_as; | |
1339 | else | |
1340 | local_as = peer->local_as; | |
1341 | stream_putl (s, local_as ); | |
1342 | ||
adbac85e | 1343 | /* AddPath */ |
a82478b9 DS |
1344 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) |
1345 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1346 | if (peer->afc[afi][safi]) | |
adbac85e DW |
1347 | { |
1348 | afi_safi_count++; | |
1349 | ||
1350 | /* Only advertise addpath TX if a feature that will use it is | |
1351 | * configured */ | |
06370dac DW |
1352 | if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_ALL_PATHS) || |
1353 | CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) | |
adbac85e DW |
1354 | adv_addpath_tx = 1; |
1355 | } | |
a82478b9 DS |
1356 | |
1357 | SET_FLAG (peer->cap, PEER_CAP_ADDPATH_ADV); | |
1358 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1359 | stream_putc (s, (CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count) + 2); | |
1360 | stream_putc (s, CAPABILITY_CODE_ADDPATH); | |
1361 | stream_putc (s, CAPABILITY_CODE_ADDPATH_LEN * afi_safi_count); | |
1362 | ||
1363 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
1364 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1365 | if (peer->afc[afi][safi]) | |
1366 | { | |
9cabb64b | 1367 | /* Convert AFI, SAFI to values for packet. */ |
1368 | bgp_map_afi_safi_int2iana (afi, safi, &pkt_afi, &pkt_safi); | |
1369 | ||
1370 | stream_putw (s, pkt_afi); | |
1371 | stream_putc (s, pkt_safi); | |
adbac85e DW |
1372 | |
1373 | if (adv_addpath_tx) | |
1374 | { | |
1375 | stream_putc (s, BGP_ADDPATH_RX|BGP_ADDPATH_TX); | |
1376 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV); | |
1377 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_ADV); | |
1378 | } | |
1379 | else | |
1380 | { | |
1381 | stream_putc (s, BGP_ADDPATH_RX); | |
1382 | SET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV); | |
1383 | UNSET_FLAG (peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_TX_ADV); | |
1384 | } | |
a82478b9 DS |
1385 | } |
1386 | ||
718e3744 | 1387 | /* ORF capability. */ |
1388 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
1389 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1390 | if (CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_SM) | |
1391 | || CHECK_FLAG (peer->af_flags[afi][safi], PEER_FLAG_ORF_PREFIX_RM)) | |
1392 | { | |
1393 | bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF_OLD); | |
1394 | bgp_open_capability_orf (s, peer, afi, safi, CAPABILITY_CODE_ORF); | |
1395 | } | |
1396 | ||
1397 | /* Dynamic capability. */ | |
1398 | if (CHECK_FLAG (peer->flags, PEER_FLAG_DYNAMIC_CAPABILITY)) | |
1399 | { | |
1400 | SET_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV); | |
1401 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1402 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
89eeecb8 DS |
1403 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_OLD); |
1404 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1405 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1406 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN + 2); | |
718e3744 | 1407 | stream_putc (s, CAPABILITY_CODE_DYNAMIC); |
1408 | stream_putc (s, CAPABILITY_CODE_DYNAMIC_LEN); | |
1409 | } | |
1410 | ||
04b6bdc0 DW |
1411 | /* Hostname capability */ |
1412 | uname(&names); | |
1413 | if (names.nodename[0] != '\0') | |
1414 | { | |
1415 | SET_FLAG(peer->cap, PEER_CAP_HOSTNAME_ADV); | |
1416 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1417 | rcapp = stream_get_endp(s); /* Ptr to length placeholder */ | |
1418 | stream_putc(s, 0); /* dummy len for now */ | |
1419 | stream_putc (s, CAPABILITY_CODE_FQDN); | |
1420 | capp = stream_get_endp(s); | |
1421 | stream_putc(s, 0); /* dummy len for now */ | |
1422 | len = strlen(names.nodename); | |
1423 | if (len > BGP_MAX_HOSTNAME) | |
1424 | len = BGP_MAX_HOSTNAME; | |
1425 | ||
1426 | stream_putc(s, len); | |
1427 | stream_put(s, names.nodename, len); | |
60060acc | 1428 | #ifdef HAVE_STRUCT_UTSNAME_DOMAINNAME |
04b6bdc0 DW |
1429 | if ((names.domainname[0] != '\0') && |
1430 | (strcmp(names.domainname, "(none)") != 0)) | |
1431 | { | |
1432 | len = strlen(names.domainname); | |
1433 | if (len > BGP_MAX_HOSTNAME) | |
1434 | len = BGP_MAX_HOSTNAME; | |
1435 | ||
1436 | stream_putc(s, len); | |
1437 | stream_put(s, names.domainname, len); | |
1438 | } | |
1439 | else | |
1440 | #endif | |
1441 | { | |
1442 | stream_putc(s, 0); /* 0 length */ | |
1443 | } | |
1444 | ||
1445 | /* Set the lengths straight */ | |
1446 | len = stream_get_endp(s) - rcapp - 1; | |
1447 | stream_putc_at(s, rcapp, len); | |
1448 | len = stream_get_endp(s) - capp - 1; | |
1449 | stream_putc_at(s, capp, len); | |
1450 | ||
1451 | if (bgp_debug_neighbor_events(peer)) | |
60060acc | 1452 | #ifdef HAVE_STRUCT_UTSNAME_DOMAINNAME |
04b6bdc0 DW |
1453 | zlog_debug("%s Sending hostname cap with hn = %s, dn = %s", |
1454 | peer->host, names.nodename, names.domainname); | |
60060acc RW |
1455 | #else |
1456 | zlog_debug("%s Sending hostname cap with hn = %s", peer->host, | |
1457 | names.nodename); | |
1458 | #endif | |
04b6bdc0 DW |
1459 | } |
1460 | ||
fe7d2a48 DS |
1461 | /* Sending base graceful-restart capability irrespective of the config */ |
1462 | SET_FLAG (peer->cap, PEER_CAP_RESTART_ADV); | |
1463 | stream_putc (s, BGP_OPEN_OPT_CAP); | |
1464 | capp = stream_get_endp (s); /* Set Capability Len Pointer */ | |
1465 | stream_putc (s, 0); /* Capability Length */ | |
1466 | stream_putc (s, CAPABILITY_CODE_RESTART); | |
1467 | rcapp = stream_get_endp (s); /* Set Restart Capability Len Pointer */ | |
1468 | stream_putc (s, 0); | |
1469 | restart_time = peer->bgp->restart_time; | |
1470 | if (peer->bgp->t_startup) | |
1471 | { | |
1472 | SET_FLAG (restart_time, RESTART_R_BIT); | |
1473 | SET_FLAG (peer->cap, PEER_CAP_RESTART_BIT_ADV); | |
1474 | } | |
1475 | stream_putw (s, restart_time); | |
1476 | ||
1477 | /* Send address-family specific graceful-restart capability only when GR config | |
1478 | is present */ | |
538621f2 | 1479 | if (bgp_flag_check (peer->bgp, BGP_FLAG_GRACEFUL_RESTART)) |
1480 | { | |
fe7d2a48 DS |
1481 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) |
1482 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
1483 | if (peer->afc[afi][safi]) | |
1484 | { | |
9cabb64b | 1485 | /* Convert AFI, SAFI to values for packet. */ |
1486 | bgp_map_afi_safi_int2iana (afi, safi, &pkt_afi, &pkt_safi); | |
1487 | stream_putw (s, pkt_afi); | |
1488 | stream_putc (s, pkt_safi); | |
6a9a3cde JC |
1489 | if (bgp_flag_check(peer->bgp, BGP_FLAG_GR_PRESERVE_FWD)) |
1490 | stream_putc (s, RESTART_F_BIT); | |
1491 | else | |
1492 | stream_putc (s, 0); | |
fe7d2a48 DS |
1493 | } |
1494 | } | |
1495 | ||
1496 | /* Total Graceful restart capability Len. */ | |
1497 | len = stream_get_endp (s) - rcapp - 1; | |
1498 | stream_putc_at (s, rcapp, len); | |
1499 | ||
1500 | /* Total Capability Len. */ | |
1501 | len = stream_get_endp (s) - capp - 1; | |
1502 | stream_putc_at (s, capp, len); | |
538621f2 | 1503 | |
718e3744 | 1504 | /* Total Opt Parm Len. */ |
9985f83c | 1505 | len = stream_get_endp (s) - cp - 1; |
718e3744 | 1506 | stream_putc_at (s, cp, len); |
1507 | } |