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718e3744 | 1 | /* zebra client |
2 | Copyright (C) 1997, 98, 99 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 | |
18 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "command.h" | |
24 | #include "stream.h" | |
25 | #include "network.h" | |
26 | #include "prefix.h" | |
27 | #include "log.h" | |
28 | #include "sockunion.h" | |
29 | #include "zclient.h" | |
30 | #include "routemap.h" | |
31 | #include "thread.h" | |
3f9c7369 | 32 | #include "queue.h" |
718e3744 | 33 | |
34 | #include "bgpd/bgpd.h" | |
35 | #include "bgpd/bgp_route.h" | |
36 | #include "bgpd/bgp_attr.h" | |
37 | #include "bgpd/bgp_nexthop.h" | |
38 | #include "bgpd/bgp_zebra.h" | |
39 | #include "bgpd/bgp_fsm.h" | |
a39275d7 | 40 | #include "bgpd/bgp_debug.h" |
8196f13d | 41 | #include "bgpd/bgp_mpath.h" |
fb018d25 | 42 | #include "bgpd/bgp_nexthop.h" |
ffd0c037 | 43 | #include "bgpd/bgp_nht.h" |
c43ed2e4 | 44 | #include "bgpd/bgp_bfd.h" |
6b0655a2 | 45 | |
718e3744 | 46 | /* All information about zebra. */ |
228da428 | 47 | struct zclient *zclient = NULL; |
18a6dce6 | 48 | struct in_addr router_id_zebra; |
718e3744 | 49 | |
8196f13d JB |
50 | /* Growable buffer for nexthops sent to zebra */ |
51 | struct stream *bgp_nexthop_buf = NULL; | |
431aa9f9 | 52 | struct stream *bgp_ifindices_buf = NULL; |
8196f13d | 53 | |
73ac8160 DS |
54 | /* These array buffers are used in making a copy of the attributes for |
55 | route-map apply. Arrays are being used here to minimize mallocs and | |
56 | frees for the temporary copy of the attributes. | |
57 | Given the zapi api expects the nexthop buffer to contain pointer to | |
58 | pointers for nexthops, we couldnt have used a single nexthop variable | |
59 | on the stack, hence we had two options: | |
60 | 1. maintain a linked-list and free it after zapi_*_route call | |
61 | 2. use an array to avoid number of mallocs. | |
62 | Number of supported next-hops are finite, use of arrays should be ok. */ | |
63 | struct attr attr_cp[BGP_MAXIMUM_MAXPATHS]; | |
64 | struct attr_extra attr_extra_cp[BGP_MAXIMUM_MAXPATHS]; | |
65 | int attr_index = 0; | |
66 | ||
67 | /* Once per address-family initialization of the attribute array */ | |
68 | #define BGP_INFO_ATTR_BUF_INIT()\ | |
69 | do {\ | |
70 | memset(attr_cp, 0, BGP_MAXIMUM_MAXPATHS * sizeof(struct attr));\ | |
71 | memset(attr_extra_cp, 0, BGP_MAXIMUM_MAXPATHS * sizeof(struct attr_extra));\ | |
72 | attr_index = 0;\ | |
73 | } while (0) | |
74 | ||
75 | #define BGP_INFO_ATTR_BUF_COPY(info_src, info_dst)\ | |
76 | do { \ | |
77 | *info_dst = *info_src; \ | |
78 | assert(attr_index != BGP_MAXIMUM_MAXPATHS);\ | |
79 | attr_cp[attr_index].extra = &attr_extra_cp[attr_index]; \ | |
80 | bgp_attr_dup (&attr_cp[attr_index], info_src->attr); \ | |
81 | bgp_attr_deep_dup (&attr_cp[attr_index], info_src->attr); \ | |
82 | info_dst->attr = &attr_cp[attr_index]; \ | |
83 | attr_index++;\ | |
84 | } while (0) | |
85 | ||
86 | #define BGP_INFO_ATTR_BUF_FREE(info) \ | |
87 | do { \ | |
88 | bgp_attr_deep_free(info->attr); \ | |
89 | } while (0) | |
90 | ||
18a6dce6 | 91 | /* Router-id update message from zebra. */ |
94f2b392 | 92 | static int |
18a6dce6 | 93 | bgp_router_id_update (int command, struct zclient *zclient, zebra_size_t length) |
718e3744 | 94 | { |
18a6dce6 | 95 | struct prefix router_id; |
1eb8ef25 | 96 | struct listnode *node, *nnode; |
18a6dce6 | 97 | struct bgp *bgp; |
718e3744 | 98 | |
18a6dce6 | 99 | zebra_router_id_update_read(zclient->ibuf,&router_id); |
a39275d7 | 100 | |
16286195 | 101 | if (BGP_DEBUG (zebra, ZEBRA)) |
a39275d7 AS |
102 | { |
103 | char buf[128]; | |
104 | prefix2str(&router_id, buf, sizeof(buf)); | |
105 | zlog_debug("Zebra rcvd: router id update %s", buf); | |
106 | } | |
107 | ||
18a6dce6 | 108 | router_id_zebra = router_id.u.prefix4; |
718e3744 | 109 | |
1eb8ef25 | 110 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) |
718e3744 | 111 | { |
18a6dce6 | 112 | if (!bgp->router_id_static.s_addr) |
1eb8ef25 | 113 | bgp_router_id_set (bgp, &router_id.u.prefix4); |
718e3744 | 114 | } |
18a6dce6 | 115 | |
718e3744 | 116 | return 0; |
117 | } | |
118 | ||
fb018d25 DS |
119 | /* Nexthop update message from zebra. */ |
120 | static int | |
121 | bgp_read_nexthop_update (int command, struct zclient *zclient, | |
122 | zebra_size_t length) | |
123 | { | |
078430f6 DS |
124 | bgp_parse_nexthop_update(command); |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int | |
129 | bgp_read_import_check_update(int command, struct zclient *zclient, | |
130 | zebra_size_t length) | |
131 | { | |
132 | bgp_parse_nexthop_update(command); | |
fb018d25 DS |
133 | return 0; |
134 | } | |
135 | ||
a80beece | 136 | static void |
a197c47c | 137 | bgp_start_interface_nbrs (struct interface *ifp) |
a80beece DS |
138 | { |
139 | struct listnode *node, *nnode, *mnode; | |
140 | struct bgp *bgp; | |
141 | struct peer *peer; | |
142 | ||
143 | for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp)) | |
144 | { | |
145 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
146 | { | |
a197c47c DS |
147 | if (peer->conf_if && |
148 | (strcmp (peer->conf_if, ifp->name) == 0) && | |
149 | peer->status != Established) | |
a80beece DS |
150 | { |
151 | if (peer_active(peer)) | |
152 | BGP_EVENT_ADD (peer, BGP_Stop); | |
153 | BGP_EVENT_ADD (peer, BGP_Start); | |
154 | } | |
155 | } | |
156 | } | |
157 | } | |
158 | ||
159 | static void | |
a197c47c DS |
160 | bgp_nbr_connected_add (struct nbr_connected *ifc) |
161 | { | |
162 | struct listnode *node; | |
163 | struct connected *connected; | |
164 | struct interface *ifp; | |
165 | struct prefix *p; | |
166 | ||
167 | /* Kick-off the FSM for any relevant peers only if there is a | |
168 | * valid local address on the interface. | |
169 | */ | |
170 | ifp = ifc->ifp; | |
171 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, connected)) | |
172 | { | |
173 | p = connected->address; | |
174 | if (p->family == AF_INET6 && | |
175 | IN6_IS_ADDR_LINKLOCAL (&p->u.prefix6)) | |
176 | break; | |
177 | } | |
178 | if (!connected) | |
179 | return; | |
180 | ||
181 | bgp_start_interface_nbrs (ifp); | |
182 | } | |
183 | ||
184 | static void | |
185 | bgp_nbr_connected_delete (struct nbr_connected *ifc, int del) | |
a80beece DS |
186 | { |
187 | struct listnode *node, *nnode, *mnode; | |
188 | struct bgp *bgp; | |
189 | struct peer *peer; | |
a197c47c | 190 | struct interface *ifp; |
a80beece DS |
191 | |
192 | for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp)) | |
193 | { | |
194 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
195 | { | |
196 | if (peer->conf_if && (strcmp (peer->conf_if, ifc->ifp->name) == 0)) | |
197 | { | |
198 | BGP_EVENT_ADD (peer, BGP_Stop); | |
199 | } | |
200 | } | |
201 | } | |
a197c47c DS |
202 | /* Free neighbor also, if we're asked to. */ |
203 | if (del) | |
204 | { | |
205 | ifp = ifc->ifp; | |
206 | listnode_delete (ifp->nbr_connected, ifc); | |
207 | nbr_connected_free (ifc); | |
208 | } | |
a80beece DS |
209 | } |
210 | ||
718e3744 | 211 | /* Inteface addition message from zebra. */ |
94f2b392 | 212 | static int |
718e3744 | 213 | bgp_interface_add (int command, struct zclient *zclient, zebra_size_t length) |
214 | { | |
215 | struct interface *ifp; | |
216 | ||
217 | ifp = zebra_interface_add_read (zclient->ibuf); | |
718e3744 | 218 | |
16286195 | 219 | if (BGP_DEBUG (zebra, ZEBRA) && ifp) |
a39275d7 AS |
220 | zlog_debug("Zebra rcvd: interface add %s", ifp->name); |
221 | ||
718e3744 | 222 | return 0; |
223 | } | |
224 | ||
94f2b392 | 225 | static int |
718e3744 | 226 | bgp_interface_delete (int command, struct zclient *zclient, |
227 | zebra_size_t length) | |
228 | { | |
229 | struct stream *s; | |
230 | struct interface *ifp; | |
231 | ||
232 | s = zclient->ibuf; | |
233 | ifp = zebra_interface_state_read (s); | |
d2fc8896 | 234 | ifp->ifindex = IFINDEX_INTERNAL; |
718e3744 | 235 | |
16286195 | 236 | if (BGP_DEBUG (zebra, ZEBRA)) |
a39275d7 AS |
237 | zlog_debug("Zebra rcvd: interface delete %s", ifp->name); |
238 | ||
718e3744 | 239 | return 0; |
240 | } | |
241 | ||
94f2b392 | 242 | static int |
718e3744 | 243 | bgp_interface_up (int command, struct zclient *zclient, zebra_size_t length) |
244 | { | |
245 | struct stream *s; | |
246 | struct interface *ifp; | |
247 | struct connected *c; | |
a80beece | 248 | struct nbr_connected *nc; |
1eb8ef25 | 249 | struct listnode *node, *nnode; |
718e3744 | 250 | |
251 | s = zclient->ibuf; | |
252 | ifp = zebra_interface_state_read (s); | |
253 | ||
254 | if (! ifp) | |
255 | return 0; | |
256 | ||
16286195 | 257 | if (BGP_DEBUG (zebra, ZEBRA)) |
a39275d7 AS |
258 | zlog_debug("Zebra rcvd: interface %s up", ifp->name); |
259 | ||
1eb8ef25 | 260 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c)) |
261 | bgp_connected_add (c); | |
718e3744 | 262 | |
a80beece DS |
263 | for (ALL_LIST_ELEMENTS (ifp->nbr_connected, node, nnode, nc)) |
264 | bgp_nbr_connected_add (nc); | |
265 | ||
718e3744 | 266 | return 0; |
267 | } | |
268 | ||
94f2b392 | 269 | static int |
718e3744 | 270 | bgp_interface_down (int command, struct zclient *zclient, zebra_size_t length) |
271 | { | |
272 | struct stream *s; | |
273 | struct interface *ifp; | |
274 | struct connected *c; | |
a80beece | 275 | struct nbr_connected *nc; |
1eb8ef25 | 276 | struct listnode *node, *nnode; |
718e3744 | 277 | |
278 | s = zclient->ibuf; | |
279 | ifp = zebra_interface_state_read (s); | |
280 | if (! ifp) | |
281 | return 0; | |
282 | ||
16286195 | 283 | if (BGP_DEBUG (zebra, ZEBRA)) |
a39275d7 AS |
284 | zlog_debug("Zebra rcvd: interface %s down", ifp->name); |
285 | ||
1eb8ef25 | 286 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c)) |
287 | bgp_connected_delete (c); | |
718e3744 | 288 | |
a80beece | 289 | for (ALL_LIST_ELEMENTS (ifp->nbr_connected, node, nnode, nc)) |
a197c47c | 290 | bgp_nbr_connected_delete (nc, 1); |
a80beece | 291 | |
8da8689d | 292 | /* Fast external-failover */ |
718e3744 | 293 | { |
1eb8ef25 | 294 | struct listnode *mnode; |
718e3744 | 295 | struct bgp *bgp; |
296 | struct peer *peer; | |
718e3744 | 297 | |
1eb8ef25 | 298 | for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp)) |
718e3744 | 299 | { |
300 | if (CHECK_FLAG (bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER)) | |
301 | continue; | |
302 | ||
1eb8ef25 | 303 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) |
718e3744 | 304 | { |
8da8689d | 305 | if ((peer->ttl != 1) && (peer->gtsm_hops != 1)) |
718e3744 | 306 | continue; |
307 | ||
8da8689d | 308 | if (ifp == peer->nexthop.ifp) |
718e3744 | 309 | BGP_EVENT_ADD (peer, BGP_Stop); |
310 | } | |
311 | } | |
312 | } | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
94f2b392 | 317 | static int |
718e3744 | 318 | bgp_interface_address_add (int command, struct zclient *zclient, |
319 | zebra_size_t length) | |
320 | { | |
321 | struct connected *ifc; | |
322 | ||
0a589359 | 323 | ifc = zebra_interface_address_read (command, zclient->ibuf); |
718e3744 | 324 | |
325 | if (ifc == NULL) | |
326 | return 0; | |
327 | ||
16286195 | 328 | if (bgp_debug_zebra(ifc->address)) |
a39275d7 AS |
329 | { |
330 | char buf[128]; | |
331 | prefix2str(ifc->address, buf, sizeof(buf)); | |
332 | zlog_debug("Zebra rcvd: interface %s address add %s", | |
333 | ifc->ifp->name, buf); | |
334 | } | |
335 | ||
2e3b2e47 | 336 | if (if_is_operative (ifc->ifp)) |
a197c47c DS |
337 | { |
338 | bgp_connected_add (ifc); | |
339 | /* If we have learnt of any neighbors on this interface, | |
340 | * check to kick off any BGP interface-based neighbors, | |
341 | * but only if this is a link-local address. | |
342 | */ | |
343 | if (IN6_IS_ADDR_LINKLOCAL(&ifc->address->u.prefix6) && | |
344 | !list_isempty(ifc->ifp->nbr_connected)) | |
345 | bgp_start_interface_nbrs (ifc->ifp); | |
346 | } | |
718e3744 | 347 | |
348 | return 0; | |
349 | } | |
350 | ||
94f2b392 | 351 | static int |
718e3744 | 352 | bgp_interface_address_delete (int command, struct zclient *zclient, |
353 | zebra_size_t length) | |
354 | { | |
355 | struct connected *ifc; | |
356 | ||
0a589359 | 357 | ifc = zebra_interface_address_read (command, zclient->ibuf); |
718e3744 | 358 | |
359 | if (ifc == NULL) | |
360 | return 0; | |
361 | ||
16286195 | 362 | if (bgp_debug_zebra(ifc->address)) |
a39275d7 AS |
363 | { |
364 | char buf[128]; | |
365 | prefix2str(ifc->address, buf, sizeof(buf)); | |
366 | zlog_debug("Zebra rcvd: interface %s address delete %s", | |
367 | ifc->ifp->name, buf); | |
368 | } | |
369 | ||
2e3b2e47 | 370 | if (if_is_operative (ifc->ifp)) |
718e3744 | 371 | bgp_connected_delete (ifc); |
372 | ||
373 | connected_free (ifc); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
a80beece DS |
378 | static int |
379 | bgp_interface_nbr_address_add (int command, struct zclient *zclient, | |
380 | zebra_size_t length) | |
381 | { | |
382 | struct nbr_connected *ifc = NULL; | |
383 | ||
384 | ifc = zebra_interface_nbr_address_read (command, zclient->ibuf); | |
385 | ||
386 | if (ifc == NULL) | |
387 | return 0; | |
388 | ||
16286195 | 389 | if (bgp_debug_zebra(ifc->address)) |
a80beece DS |
390 | { |
391 | char buf[128]; | |
392 | prefix2str(ifc->address, buf, sizeof(buf)); | |
393 | zlog_debug("Zebra rcvd: interface %s nbr address add %s", | |
394 | ifc->ifp->name, buf); | |
395 | } | |
396 | ||
397 | if (if_is_operative (ifc->ifp)) | |
398 | bgp_nbr_connected_add (ifc); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | static int | |
404 | bgp_interface_nbr_address_delete (int command, struct zclient *zclient, | |
405 | zebra_size_t length) | |
406 | { | |
407 | struct nbr_connected *ifc = NULL; | |
408 | ||
409 | ifc = zebra_interface_nbr_address_read (command, zclient->ibuf); | |
410 | ||
411 | if (ifc == NULL) | |
412 | return 0; | |
413 | ||
16286195 | 414 | if (bgp_debug_zebra(ifc->address)) |
a80beece DS |
415 | { |
416 | char buf[128]; | |
417 | prefix2str(ifc->address, buf, sizeof(buf)); | |
418 | zlog_debug("Zebra rcvd: interface %s nbr address delete %s", | |
419 | ifc->ifp->name, buf); | |
420 | } | |
421 | ||
422 | if (if_is_operative (ifc->ifp)) | |
a197c47c | 423 | bgp_nbr_connected_delete (ifc, 0); |
a80beece DS |
424 | |
425 | nbr_connected_free (ifc); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
718e3744 | 430 | /* Zebra route add and delete treatment. */ |
94f2b392 | 431 | static int |
718e3744 | 432 | zebra_read_ipv4 (int command, struct zclient *zclient, zebra_size_t length) |
433 | { | |
434 | struct stream *s; | |
435 | struct zapi_ipv4 api; | |
718e3744 | 436 | struct in_addr nexthop; |
437 | struct prefix_ipv4 p; | |
bc413143 | 438 | unsigned int ifindex; |
718e3744 | 439 | |
440 | s = zclient->ibuf; | |
718e3744 | 441 | nexthop.s_addr = 0; |
442 | ||
443 | /* Type, flags, message. */ | |
444 | api.type = stream_getc (s); | |
7c8ff89e | 445 | api.instance = stream_getw (s); |
718e3744 | 446 | api.flags = stream_getc (s); |
447 | api.message = stream_getc (s); | |
448 | ||
449 | /* IPv4 prefix. */ | |
450 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
451 | p.family = AF_INET; | |
452 | p.prefixlen = stream_getc (s); | |
453 | stream_get (&p.prefix, s, PSIZE (p.prefixlen)); | |
454 | ||
455 | /* Nexthop, ifindex, distance, metric. */ | |
456 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP)) | |
457 | { | |
458 | api.nexthop_num = stream_getc (s); | |
459 | nexthop.s_addr = stream_get_ipv4 (s); | |
460 | } | |
0d9551dc | 461 | |
718e3744 | 462 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX)) |
463 | { | |
464 | api.ifindex_num = stream_getc (s); | |
bc413143 | 465 | ifindex = stream_getl (s); /* ifindex, unused */ |
718e3744 | 466 | } |
ffd0c037 DS |
467 | else |
468 | { | |
469 | ifindex = 0; | |
470 | } | |
0d9551dc | 471 | |
718e3744 | 472 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE)) |
473 | api.distance = stream_getc (s); | |
0d9551dc | 474 | |
718e3744 | 475 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC)) |
476 | api.metric = stream_getl (s); | |
477 | else | |
478 | api.metric = 0; | |
479 | ||
0d9551dc DS |
480 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_TAG)) |
481 | api.tag = stream_getw (s); | |
482 | else | |
483 | api.tag = 0; | |
484 | ||
718e3744 | 485 | if (command == ZEBRA_IPV4_ROUTE_ADD) |
a39275d7 | 486 | { |
ffd0c037 | 487 | if (bgp_debug_zebra((struct prefix *)&p)) |
a39275d7 AS |
488 | { |
489 | char buf[2][INET_ADDRSTRLEN]; | |
7c8ff89e DS |
490 | zlog_debug("Zebra rcvd: IPv4 route add %s[%d] %s/%d nexthop %s metric %u tag %d", |
491 | zebra_route_string(api.type), api.instance, | |
a39275d7 AS |
492 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), |
493 | p.prefixlen, | |
494 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
0d9551dc DS |
495 | api.metric, |
496 | api.tag); | |
a39275d7 | 497 | } |
bc413143 | 498 | bgp_redistribute_add((struct prefix *)&p, &nexthop, NULL, ifindex, |
7c8ff89e | 499 | api.metric, api.type, api.instance, api.tag); |
a39275d7 | 500 | } |
718e3744 | 501 | else |
a39275d7 | 502 | { |
ffd0c037 | 503 | if (bgp_debug_zebra((struct prefix *)&p)) |
a39275d7 AS |
504 | { |
505 | char buf[2][INET_ADDRSTRLEN]; | |
7c8ff89e | 506 | zlog_debug("Zebra rcvd: IPv4 route delete %s[%d] %s/%d " |
0d9551dc | 507 | "nexthop %s metric %u tag %d", |
7c8ff89e | 508 | zebra_route_string(api.type), api.instance, |
a39275d7 AS |
509 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), |
510 | p.prefixlen, | |
511 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
0d9551dc DS |
512 | api.metric, |
513 | api.tag); | |
a39275d7 | 514 | } |
7c8ff89e | 515 | bgp_redistribute_delete((struct prefix *)&p, api.type, api.instance); |
a39275d7 | 516 | } |
718e3744 | 517 | |
518 | return 0; | |
519 | } | |
520 | ||
521 | #ifdef HAVE_IPV6 | |
522 | /* Zebra route add and delete treatment. */ | |
94f2b392 | 523 | static int |
718e3744 | 524 | zebra_read_ipv6 (int command, struct zclient *zclient, zebra_size_t length) |
525 | { | |
526 | struct stream *s; | |
527 | struct zapi_ipv6 api; | |
718e3744 | 528 | struct in6_addr nexthop; |
529 | struct prefix_ipv6 p; | |
bc413143 | 530 | unsigned int ifindex; |
718e3744 | 531 | |
532 | s = zclient->ibuf; | |
718e3744 | 533 | memset (&nexthop, 0, sizeof (struct in6_addr)); |
534 | ||
535 | /* Type, flags, message. */ | |
536 | api.type = stream_getc (s); | |
7c8ff89e | 537 | api.instance = stream_getw (s); |
718e3744 | 538 | api.flags = stream_getc (s); |
539 | api.message = stream_getc (s); | |
540 | ||
541 | /* IPv6 prefix. */ | |
542 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
543 | p.family = AF_INET6; | |
544 | p.prefixlen = stream_getc (s); | |
545 | stream_get (&p.prefix, s, PSIZE (p.prefixlen)); | |
546 | ||
547 | /* Nexthop, ifindex, distance, metric. */ | |
548 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP)) | |
549 | { | |
550 | api.nexthop_num = stream_getc (s); | |
551 | stream_get (&nexthop, s, 16); | |
552 | } | |
0d9551dc | 553 | |
718e3744 | 554 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX)) |
555 | { | |
556 | api.ifindex_num = stream_getc (s); | |
bc413143 | 557 | ifindex = stream_getl (s); /* ifindex, unused */ |
718e3744 | 558 | } |
ffd0c037 DS |
559 | else |
560 | { | |
561 | ifindex = 0; | |
562 | } | |
0d9551dc | 563 | |
718e3744 | 564 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE)) |
565 | api.distance = stream_getc (s); | |
566 | else | |
567 | api.distance = 0; | |
0d9551dc | 568 | |
718e3744 | 569 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC)) |
570 | api.metric = stream_getl (s); | |
571 | else | |
572 | api.metric = 0; | |
573 | ||
0d9551dc DS |
574 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_TAG)) |
575 | api.tag = stream_getw (s); | |
576 | else | |
577 | api.tag = 0; | |
578 | ||
718e3744 | 579 | /* Simply ignore link-local address. */ |
580 | if (IN6_IS_ADDR_LINKLOCAL (&p.prefix)) | |
581 | return 0; | |
582 | ||
583 | if (command == ZEBRA_IPV6_ROUTE_ADD) | |
a39275d7 | 584 | { |
ffd0c037 | 585 | if (bgp_debug_zebra((struct prefix *)&p)) |
a39275d7 | 586 | { |
f04a80a5 | 587 | char buf[2][INET6_ADDRSTRLEN]; |
7c8ff89e DS |
588 | zlog_debug("Zebra rcvd: IPv6 route add %s[%d] %s/%d nexthop %s metric %u tag %d", |
589 | zebra_route_string(api.type), api.instance, | |
f04a80a5 SH |
590 | inet_ntop(AF_INET6, &p.prefix, buf[0], sizeof(buf[0])), |
591 | p.prefixlen, | |
592 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
0d9551dc DS |
593 | api.metric, |
594 | api.tag); | |
a39275d7 | 595 | } |
bc413143 | 596 | bgp_redistribute_add ((struct prefix *)&p, NULL, &nexthop, ifindex, |
7c8ff89e | 597 | api.metric, api.type, api.instance, api.tag); |
a39275d7 | 598 | } |
718e3744 | 599 | else |
a39275d7 | 600 | { |
ffd0c037 | 601 | if (bgp_debug_zebra((struct prefix *)&p)) |
a39275d7 | 602 | { |
f04a80a5 | 603 | char buf[2][INET6_ADDRSTRLEN]; |
7c8ff89e | 604 | zlog_debug("Zebra rcvd: IPv6 route delete %s[%d] %s/%d " |
0d9551dc | 605 | "nexthop %s metric %u tag %d", |
7c8ff89e | 606 | zebra_route_string(api.type), api.instance, |
f04a80a5 SH |
607 | inet_ntop(AF_INET6, &p.prefix, buf[0], sizeof(buf[0])), |
608 | p.prefixlen, | |
609 | inet_ntop(AF_INET6, &nexthop, buf[1], sizeof(buf[1])), | |
0d9551dc DS |
610 | api.metric, |
611 | api.tag); | |
a39275d7 | 612 | } |
7c8ff89e | 613 | bgp_redistribute_delete ((struct prefix *) &p, api.type, api.instance); |
a39275d7 | 614 | } |
718e3744 | 615 | |
616 | return 0; | |
617 | } | |
618 | #endif /* HAVE_IPV6 */ | |
6b0655a2 | 619 | |
718e3744 | 620 | struct interface * |
621 | if_lookup_by_ipv4 (struct in_addr *addr) | |
622 | { | |
52dc7ee6 | 623 | struct listnode *ifnode; |
624 | struct listnode *cnode; | |
718e3744 | 625 | struct interface *ifp; |
626 | struct connected *connected; | |
627 | struct prefix_ipv4 p; | |
628 | struct prefix *cp; | |
629 | ||
630 | p.family = AF_INET; | |
631 | p.prefix = *addr; | |
632 | p.prefixlen = IPV4_MAX_BITLEN; | |
633 | ||
1eb8ef25 | 634 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 635 | { |
1eb8ef25 | 636 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 637 | { |
718e3744 | 638 | cp = connected->address; |
639 | ||
640 | if (cp->family == AF_INET) | |
641 | if (prefix_match (cp, (struct prefix *)&p)) | |
642 | return ifp; | |
643 | } | |
644 | } | |
645 | return NULL; | |
646 | } | |
647 | ||
648 | struct interface * | |
649 | if_lookup_by_ipv4_exact (struct in_addr *addr) | |
650 | { | |
52dc7ee6 | 651 | struct listnode *ifnode; |
652 | struct listnode *cnode; | |
718e3744 | 653 | struct interface *ifp; |
654 | struct connected *connected; | |
655 | struct prefix *cp; | |
656 | ||
1eb8ef25 | 657 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 658 | { |
1eb8ef25 | 659 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 660 | { |
718e3744 | 661 | cp = connected->address; |
662 | ||
663 | if (cp->family == AF_INET) | |
664 | if (IPV4_ADDR_SAME (&cp->u.prefix4, addr)) | |
665 | return ifp; | |
666 | } | |
667 | } | |
668 | return NULL; | |
669 | } | |
670 | ||
671 | #ifdef HAVE_IPV6 | |
672 | struct interface * | |
ffd0c037 | 673 | if_lookup_by_ipv6 (struct in6_addr *addr, unsigned int ifindex) |
718e3744 | 674 | { |
52dc7ee6 | 675 | struct listnode *ifnode; |
676 | struct listnode *cnode; | |
718e3744 | 677 | struct interface *ifp; |
678 | struct connected *connected; | |
679 | struct prefix_ipv6 p; | |
680 | struct prefix *cp; | |
681 | ||
682 | p.family = AF_INET6; | |
683 | p.prefix = *addr; | |
684 | p.prefixlen = IPV6_MAX_BITLEN; | |
685 | ||
1eb8ef25 | 686 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 687 | { |
1eb8ef25 | 688 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 689 | { |
718e3744 | 690 | cp = connected->address; |
691 | ||
692 | if (cp->family == AF_INET6) | |
693 | if (prefix_match (cp, (struct prefix *)&p)) | |
f2345335 | 694 | { |
ffd0c037 | 695 | if (IN6_IS_ADDR_LINKLOCAL(&cp->u.prefix6.s6_addr32[0])) |
f2345335 DS |
696 | { |
697 | if (ifindex == ifp->ifindex) | |
698 | return ifp; | |
699 | } | |
700 | else | |
701 | return ifp; | |
702 | } | |
718e3744 | 703 | } |
704 | } | |
705 | return NULL; | |
706 | } | |
707 | ||
708 | struct interface * | |
ffd0c037 | 709 | if_lookup_by_ipv6_exact (struct in6_addr *addr, unsigned int ifindex) |
718e3744 | 710 | { |
52dc7ee6 | 711 | struct listnode *ifnode; |
712 | struct listnode *cnode; | |
718e3744 | 713 | struct interface *ifp; |
714 | struct connected *connected; | |
715 | struct prefix *cp; | |
716 | ||
1eb8ef25 | 717 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 718 | { |
1eb8ef25 | 719 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 720 | { |
718e3744 | 721 | cp = connected->address; |
722 | ||
723 | if (cp->family == AF_INET6) | |
724 | if (IPV6_ADDR_SAME (&cp->u.prefix6, addr)) | |
f2345335 DS |
725 | { |
726 | if (IN6_IS_ADDR_LINKLOCAL(&cp->u.prefix6)) | |
727 | { | |
728 | if (ifindex == ifp->ifindex) | |
729 | return ifp; | |
730 | } | |
731 | else | |
732 | return ifp; | |
733 | } | |
718e3744 | 734 | } |
735 | } | |
736 | return NULL; | |
737 | } | |
738 | ||
94f2b392 | 739 | static int |
718e3744 | 740 | if_get_ipv6_global (struct interface *ifp, struct in6_addr *addr) |
741 | { | |
52dc7ee6 | 742 | struct listnode *cnode; |
718e3744 | 743 | struct connected *connected; |
744 | struct prefix *cp; | |
745 | ||
1eb8ef25 | 746 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 747 | { |
718e3744 | 748 | cp = connected->address; |
749 | ||
750 | if (cp->family == AF_INET6) | |
751 | if (! IN6_IS_ADDR_LINKLOCAL (&cp->u.prefix6)) | |
752 | { | |
753 | memcpy (addr, &cp->u.prefix6, IPV6_MAX_BYTELEN); | |
754 | return 1; | |
755 | } | |
756 | } | |
757 | return 0; | |
758 | } | |
759 | ||
94f2b392 | 760 | static int |
718e3744 | 761 | if_get_ipv6_local (struct interface *ifp, struct in6_addr *addr) |
762 | { | |
52dc7ee6 | 763 | struct listnode *cnode; |
718e3744 | 764 | struct connected *connected; |
765 | struct prefix *cp; | |
766 | ||
1eb8ef25 | 767 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 768 | { |
718e3744 | 769 | cp = connected->address; |
770 | ||
771 | if (cp->family == AF_INET6) | |
772 | if (IN6_IS_ADDR_LINKLOCAL (&cp->u.prefix6)) | |
773 | { | |
774 | memcpy (addr, &cp->u.prefix6, IPV6_MAX_BYTELEN); | |
775 | return 1; | |
776 | } | |
777 | } | |
778 | return 0; | |
779 | } | |
780 | #endif /* HAVE_IPV6 */ | |
781 | ||
6ee06fa9 PM |
782 | static int |
783 | if_get_ipv4_address (struct interface *ifp, struct in_addr *addr) | |
784 | { | |
785 | struct listnode *cnode; | |
786 | struct connected *connected; | |
787 | struct prefix *cp; | |
788 | ||
789 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) | |
790 | { | |
791 | cp = connected->address; | |
792 | if ((cp->family == AF_INET) && !ipv4_martian(&(cp->u.prefix4))) | |
793 | { | |
794 | *addr = cp->u.prefix4; | |
795 | return 1; | |
796 | } | |
797 | } | |
798 | return 0; | |
799 | } | |
800 | ||
718e3744 | 801 | int |
802 | bgp_nexthop_set (union sockunion *local, union sockunion *remote, | |
803 | struct bgp_nexthop *nexthop, struct peer *peer) | |
804 | { | |
805 | int ret = 0; | |
806 | struct interface *ifp = NULL; | |
807 | ||
808 | memset (nexthop, 0, sizeof (struct bgp_nexthop)); | |
809 | ||
810 | if (!local) | |
811 | return -1; | |
812 | if (!remote) | |
813 | return -1; | |
814 | ||
815 | if (local->sa.sa_family == AF_INET) | |
816 | { | |
817 | nexthop->v4 = local->sin.sin_addr; | |
2fb2f5cf DS |
818 | if (peer->update_if) |
819 | ifp = if_lookup_by_name (peer->update_if); | |
820 | else | |
821 | ifp = if_lookup_by_ipv4_exact (&local->sin.sin_addr); | |
718e3744 | 822 | } |
823 | #ifdef HAVE_IPV6 | |
824 | if (local->sa.sa_family == AF_INET6) | |
825 | { | |
826 | if (IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr)) | |
827 | { | |
a80beece DS |
828 | if (peer->conf_if || peer->ifname) |
829 | ifp = if_lookup_by_index (if_nametoindex (peer->conf_if ? peer->conf_if : peer->ifname)); | |
718e3744 | 830 | } |
2fb2f5cf DS |
831 | else if (peer->update_if) |
832 | ifp = if_lookup_by_name (peer->update_if); | |
718e3744 | 833 | else |
f2345335 DS |
834 | ifp = if_lookup_by_ipv6_exact (&local->sin6.sin6_addr, |
835 | local->sin6.sin6_scope_id); | |
718e3744 | 836 | } |
837 | #endif /* HAVE_IPV6 */ | |
838 | ||
839 | if (!ifp) | |
840 | return -1; | |
841 | ||
842 | nexthop->ifp = ifp; | |
843 | ||
844 | /* IPv4 connection. */ | |
845 | if (local->sa.sa_family == AF_INET) | |
846 | { | |
847 | #ifdef HAVE_IPV6 | |
848 | /* IPv6 nexthop*/ | |
849 | ret = if_get_ipv6_global (ifp, &nexthop->v6_global); | |
850 | ||
851 | /* There is no global nexthop. */ | |
852 | if (!ret) | |
853 | if_get_ipv6_local (ifp, &nexthop->v6_global); | |
854 | else | |
855 | if_get_ipv6_local (ifp, &nexthop->v6_local); | |
856 | #endif /* HAVE_IPV6 */ | |
857 | } | |
858 | ||
859 | #ifdef HAVE_IPV6 | |
860 | /* IPv6 connection. */ | |
861 | if (local->sa.sa_family == AF_INET6) | |
862 | { | |
863 | struct interface *direct = NULL; | |
864 | ||
6ee06fa9 PM |
865 | /* IPv4 nexthop. */ |
866 | ret = if_get_ipv4_address(ifp, &nexthop->v4); | |
867 | if (!ret && peer->local_id.s_addr) | |
718e3744 | 868 | nexthop->v4 = peer->local_id; |
869 | ||
870 | /* Global address*/ | |
871 | if (! IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr)) | |
872 | { | |
873 | memcpy (&nexthop->v6_global, &local->sin6.sin6_addr, | |
874 | IPV6_MAX_BYTELEN); | |
875 | ||
876 | /* If directory connected set link-local address. */ | |
f2345335 DS |
877 | direct = if_lookup_by_ipv6 (&remote->sin6.sin6_addr, |
878 | remote->sin6.sin6_scope_id); | |
718e3744 | 879 | if (direct) |
880 | if_get_ipv6_local (ifp, &nexthop->v6_local); | |
881 | } | |
882 | else | |
883 | /* Link-local address. */ | |
884 | { | |
885 | ret = if_get_ipv6_global (ifp, &nexthop->v6_global); | |
886 | ||
887 | /* If there is no global address. Set link-local address as | |
888 | global. I know this break RFC specification... */ | |
b2b926d5 DS |
889 | /* In this scenario, the expectation for interop is that the |
890 | * network admin would use a route-map to specify the global | |
891 | * IPv6 nexthop. | |
892 | */ | |
718e3744 | 893 | if (!ret) |
894 | memcpy (&nexthop->v6_global, &local->sin6.sin6_addr, | |
895 | IPV6_MAX_BYTELEN); | |
b2b926d5 DS |
896 | /* Always set the link-local address */ |
897 | memcpy (&nexthop->v6_local, &local->sin6.sin6_addr, | |
898 | IPV6_MAX_BYTELEN); | |
718e3744 | 899 | } |
900 | } | |
901 | ||
902 | if (IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr) || | |
f2345335 | 903 | if_lookup_by_ipv6 (&remote->sin6.sin6_addr, remote->sin6.sin6_scope_id)) |
718e3744 | 904 | peer->shared_network = 1; |
905 | else | |
906 | peer->shared_network = 0; | |
907 | ||
908 | /* KAME stack specific treatment. */ | |
909 | #ifdef KAME | |
910 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->v6_global) | |
911 | && IN6_LINKLOCAL_IFINDEX (nexthop->v6_global)) | |
912 | { | |
913 | SET_IN6_LINKLOCAL_IFINDEX (nexthop->v6_global, 0); | |
914 | } | |
915 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->v6_local) | |
916 | && IN6_LINKLOCAL_IFINDEX (nexthop->v6_local)) | |
917 | { | |
918 | SET_IN6_LINKLOCAL_IFINDEX (nexthop->v6_local, 0); | |
919 | } | |
920 | #endif /* KAME */ | |
921 | #endif /* HAVE_IPV6 */ | |
922 | return ret; | |
923 | } | |
924 | ||
73ac8160 DS |
925 | static struct in6_addr * |
926 | bgp_info_to_ipv6_nexthop (struct bgp_info *info) | |
927 | { | |
928 | struct in6_addr *nexthop = NULL; | |
929 | ||
930 | /* Only global address nexthop exists. */ | |
801a9bcc | 931 | if (info->attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL) |
73ac8160 DS |
932 | nexthop = &info->attr->extra->mp_nexthop_global; |
933 | ||
934 | /* If both global and link-local address present. */ | |
801a9bcc | 935 | if (info->attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) |
73ac8160 DS |
936 | { |
937 | /* Workaround for Cisco's nexthop bug. */ | |
938 | if (IN6_IS_ADDR_UNSPECIFIED (&info->attr->extra->mp_nexthop_global) | |
939 | && info->peer->su_remote->sa.sa_family == AF_INET6) | |
940 | nexthop = &info->peer->su_remote->sin6.sin6_addr; | |
941 | else | |
942 | nexthop = &info->attr->extra->mp_nexthop_local; | |
943 | } | |
944 | ||
945 | return nexthop; | |
946 | } | |
947 | ||
948 | static int | |
949 | bgp_table_map_apply (struct route_map *map, struct prefix *p, | |
950 | struct bgp_info *info) | |
951 | { | |
952 | if (route_map_apply(map, p, RMAP_BGP, info) != RMAP_DENYMATCH) | |
953 | return 1; | |
954 | ||
16286195 | 955 | if (bgp_debug_zebra(p)) |
73ac8160 DS |
956 | { |
957 | if (p->family == AF_INET) | |
958 | { | |
959 | char buf[2][INET_ADDRSTRLEN]; | |
960 | zlog_debug("Zebra rmap deny: IPv4 route %s/%d nexthop %s", | |
961 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], sizeof(buf[0])), | |
962 | p->prefixlen, | |
963 | inet_ntop(AF_INET, &info->attr->nexthop, buf[1], | |
964 | sizeof(buf[1]))); | |
965 | } | |
966 | if (p->family == AF_INET6) | |
967 | { | |
968 | char buf[2][INET6_ADDRSTRLEN]; | |
969 | zlog_debug("Zebra rmap deny: IPv6 route %s/%d nexthop %s", | |
970 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], sizeof(buf[0])), | |
971 | p->prefixlen, | |
972 | inet_ntop(AF_INET6, bgp_info_to_ipv6_nexthop(info), buf[1], | |
973 | sizeof(buf[1]))); | |
974 | } | |
975 | } | |
976 | return 0; | |
977 | } | |
978 | ||
718e3744 | 979 | void |
73ac8160 DS |
980 | bgp_zebra_announce (struct prefix *p, struct bgp_info *info, struct bgp *bgp, |
981 | afi_t afi, safi_t safi) | |
718e3744 | 982 | { |
983 | int flags; | |
984 | u_char distance; | |
985 | struct peer *peer; | |
8196f13d JB |
986 | struct bgp_info *mpinfo; |
987 | size_t oldsize, newsize; | |
73ac8160 DS |
988 | u_int32_t nhcount, metric; |
989 | struct bgp_info local_info; | |
990 | struct bgp_info *info_cp = &local_info; | |
0d9551dc | 991 | u_short tag; |
718e3744 | 992 | |
993 | if (zclient->sock < 0) | |
994 | return; | |
995 | ||
8bb0831e DS |
996 | if ((p->family == AF_INET && !zclient->redist[AFI_IP][ZEBRA_ROUTE_BGP].enabled) |
997 | || (p->family == AF_INET6 && !zclient->redist[AFI_IP6][ZEBRA_ROUTE_BGP].enabled)) | |
718e3744 | 998 | return; |
999 | ||
4a16ae86 DS |
1000 | if (bgp->main_zebra_update_hold) |
1001 | return; | |
1002 | ||
718e3744 | 1003 | flags = 0; |
1004 | peer = info->peer; | |
1005 | ||
0d9551dc DS |
1006 | if ((info->attr->extra) && (info->attr->extra->tag != 0)) |
1007 | tag = info->attr->extra->tag; | |
1008 | else | |
1009 | tag = 0; | |
1010 | ||
f992e2a9 DS |
1011 | /* When we create an aggregate route we must also install a Null0 route in |
1012 | * the RIB */ | |
1013 | if (info->sub_type == BGP_ROUTE_AGGREGATE) | |
1014 | SET_FLAG (flags, ZEBRA_FLAG_BLACKHOLE); | |
1015 | ||
1016 | if (peer->sort == BGP_PEER_IBGP || peer->sort == BGP_PEER_CONFED || | |
1017 | info->sub_type == BGP_ROUTE_AGGREGATE) | |
718e3744 | 1018 | { |
1019 | SET_FLAG (flags, ZEBRA_FLAG_IBGP); | |
1020 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); | |
1021 | } | |
1022 | ||
6d85b15b | 1023 | if ((peer->sort == BGP_PEER_EBGP && peer->ttl != 1) |
907f92c8 DS |
1024 | || CHECK_FLAG (peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK) |
1025 | || bgp_flag_check(bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK)) | |
1026 | ||
718e3744 | 1027 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); |
1028 | ||
431aa9f9 | 1029 | nhcount = 1 + bgp_info_mpath_count (info); |
8196f13d | 1030 | |
8a92a8a0 | 1031 | if (p->family == AF_INET && !BGP_ATTR_NEXTHOP_AFI_IP6(info->attr)) |
718e3744 | 1032 | { |
1033 | struct zapi_ipv4 api; | |
1034 | struct in_addr *nexthop; | |
73ac8160 DS |
1035 | char buf[2][INET_ADDRSTRLEN]; |
1036 | int valid_nh_count = 0; | |
718e3744 | 1037 | |
431aa9f9 DS |
1038 | /* resize nexthop buffer size if necessary */ |
1039 | if ((oldsize = stream_get_size (bgp_nexthop_buf)) < | |
1040 | (sizeof (struct in_addr *) * nhcount)) | |
1041 | { | |
1042 | newsize = (sizeof (struct in_addr *) * nhcount); | |
1043 | newsize = stream_resize (bgp_nexthop_buf, newsize); | |
1044 | if (newsize == oldsize) | |
1045 | { | |
1046 | zlog_err ("can't resize nexthop buffer"); | |
1047 | return; | |
1048 | } | |
1049 | } | |
1050 | stream_reset (bgp_nexthop_buf); | |
73ac8160 DS |
1051 | nexthop = NULL; |
1052 | ||
1053 | /* Metric is currently based on the best-path only. */ | |
1054 | metric = info->attr->med; | |
1055 | ||
1056 | if (bgp->table_map[afi][safi].name) | |
1057 | { | |
1058 | BGP_INFO_ATTR_BUF_INIT(); | |
1059 | ||
1060 | /* Copy info and attributes, so the route-map apply doesn't modify the | |
1061 | BGP route info. */ | |
1062 | BGP_INFO_ATTR_BUF_COPY(info, info_cp); | |
1063 | if (bgp_table_map_apply(bgp->table_map[afi][safi].map, p, info_cp)) | |
1064 | { | |
1065 | metric = info_cp->attr->med; | |
1066 | nexthop = &info_cp->attr->nexthop; | |
0d9551dc DS |
1067 | |
1068 | if (info_cp->attr->extra) | |
1069 | tag = info_cp->attr->extra->tag; | |
73ac8160 DS |
1070 | } |
1071 | BGP_INFO_ATTR_BUF_FREE(info_cp); | |
1072 | } | |
1073 | else | |
1074 | { | |
1075 | nexthop = &info->attr->nexthop; | |
1076 | } | |
1077 | ||
1078 | if (nexthop) | |
1079 | { | |
1080 | stream_put (bgp_nexthop_buf, &nexthop, sizeof (struct in_addr *)); | |
1081 | valid_nh_count++; | |
1082 | } | |
431aa9f9 | 1083 | |
8196f13d | 1084 | for (mpinfo = bgp_info_mpath_first (info); mpinfo; |
73ac8160 DS |
1085 | mpinfo = bgp_info_mpath_next (mpinfo)) |
1086 | { | |
1087 | nexthop = NULL; | |
1088 | ||
1089 | if (bgp->table_map[afi][safi].name) | |
1090 | { | |
1091 | /* Copy info and attributes, so the route-map apply doesn't modify the | |
1092 | BGP route info. */ | |
1093 | BGP_INFO_ATTR_BUF_COPY(mpinfo, info_cp); | |
1094 | if (bgp_table_map_apply(bgp->table_map[afi][safi].map, p, info_cp)) | |
1095 | nexthop = &info_cp->attr->nexthop; | |
1096 | BGP_INFO_ATTR_BUF_FREE(info_cp); | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | nexthop = &mpinfo->attr->nexthop; | |
1101 | } | |
1102 | ||
1103 | if (nexthop == NULL) | |
1104 | continue; | |
1105 | ||
1106 | stream_put (bgp_nexthop_buf, &nexthop, sizeof (struct in_addr *)); | |
1107 | valid_nh_count++; | |
1108 | } | |
718e3744 | 1109 | |
73ac8160 | 1110 | api.flags = flags; |
718e3744 | 1111 | api.type = ZEBRA_ROUTE_BGP; |
7c8ff89e | 1112 | api.instance = 0; |
718e3744 | 1113 | api.message = 0; |
5a616c08 | 1114 | api.safi = safi; |
718e3744 | 1115 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); |
f992e2a9 DS |
1116 | |
1117 | /* Note that this currently only applies to Null0 routes for aggregates. | |
1118 | * ZEBRA_FLAG_BLACKHOLE signals zapi_ipv4_route to encode a special | |
1119 | * BLACKHOLE nexthop. We want to set api.nexthop_num to zero since we | |
1120 | * do not want to also encode the 0.0.0.0 nexthop for the aggregate route. | |
1121 | */ | |
1122 | if (CHECK_FLAG(flags, ZEBRA_FLAG_BLACKHOLE)) | |
1123 | api.nexthop_num = 0; | |
1124 | else | |
1125 | api.nexthop_num = valid_nh_count; | |
1126 | ||
8196f13d | 1127 | api.nexthop = (struct in_addr **)STREAM_DATA (bgp_nexthop_buf); |
718e3744 | 1128 | api.ifindex_num = 0; |
1129 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); | |
73ac8160 | 1130 | api.metric = metric; |
718e3744 | 1131 | |
0d9551dc DS |
1132 | if (tag) |
1133 | { | |
1134 | SET_FLAG (api.message, ZAPI_MESSAGE_TAG); | |
1135 | api.tag = tag; | |
1136 | } | |
1137 | ||
718e3744 | 1138 | distance = bgp_distance_apply (p, info, bgp); |
1139 | ||
1140 | if (distance) | |
1141 | { | |
1142 | SET_FLAG (api.message, ZAPI_MESSAGE_DISTANCE); | |
1143 | api.distance = distance; | |
1144 | } | |
a39275d7 | 1145 | |
16286195 | 1146 | if (bgp_debug_zebra(p)) |
73ac8160 DS |
1147 | { |
1148 | int i; | |
0d9551dc | 1149 | zlog_debug("Zebra send: IPv4 route %s %s/%d metric %u tag %d" |
73ac8160 DS |
1150 | " count %d", (valid_nh_count ? "add":"delete"), |
1151 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], sizeof(buf[0])), | |
0d9551dc | 1152 | p->prefixlen, api.metric, api.tag, api.nexthop_num); |
73ac8160 DS |
1153 | for (i = 0; i < api.nexthop_num; i++) |
1154 | zlog_debug(" IPv4 [nexthop %d] %s", i+1, | |
1155 | inet_ntop(AF_INET, api.nexthop[i], buf[1], sizeof(buf[1]))); | |
1156 | } | |
a39275d7 | 1157 | |
73ac8160 DS |
1158 | zapi_ipv4_route (valid_nh_count ? ZEBRA_IPV4_ROUTE_ADD: ZEBRA_IPV4_ROUTE_DELETE, |
1159 | zclient, (struct prefix_ipv4 *) p, &api); | |
718e3744 | 1160 | } |
1161 | #ifdef HAVE_IPV6 | |
431aa9f9 | 1162 | |
718e3744 | 1163 | /* We have to think about a IPv6 link-local address curse. */ |
8a92a8a0 DS |
1164 | if (p->family == AF_INET6 || |
1165 | (p->family == AF_INET && BGP_ATTR_NEXTHOP_AFI_IP6(info->attr))) | |
718e3744 | 1166 | { |
1167 | unsigned int ifindex; | |
1168 | struct in6_addr *nexthop; | |
1169 | struct zapi_ipv6 api; | |
431aa9f9 | 1170 | int valid_nh_count = 0; |
73ac8160 | 1171 | char buf[2][INET6_ADDRSTRLEN]; |
431aa9f9 DS |
1172 | |
1173 | /* resize nexthop buffer size if necessary */ | |
1174 | if ((oldsize = stream_get_size (bgp_nexthop_buf)) < | |
1175 | (sizeof (struct in6_addr *) * nhcount)) | |
1176 | { | |
1177 | newsize = (sizeof (struct in6_addr *) * nhcount); | |
1178 | newsize = stream_resize (bgp_nexthop_buf, newsize); | |
1179 | if (newsize == oldsize) | |
1180 | { | |
1181 | zlog_err ("can't resize nexthop buffer"); | |
1182 | return; | |
1183 | } | |
1184 | } | |
1185 | stream_reset (bgp_nexthop_buf); | |
1186 | ||
1187 | /* resize ifindices buffer size if necessary */ | |
1188 | if ((oldsize = stream_get_size (bgp_ifindices_buf)) < | |
1189 | (sizeof (unsigned int) * nhcount)) | |
1190 | { | |
1191 | newsize = (sizeof (unsigned int) * nhcount); | |
1192 | newsize = stream_resize (bgp_ifindices_buf, newsize); | |
1193 | if (newsize == oldsize) | |
1194 | { | |
1195 | zlog_err ("can't resize nexthop buffer"); | |
1196 | return; | |
1197 | } | |
1198 | } | |
1199 | stream_reset (bgp_ifindices_buf); | |
718e3744 | 1200 | |
1201 | ifindex = 0; | |
1202 | nexthop = NULL; | |
431aa9f9 | 1203 | |
fb982c25 | 1204 | assert (info->attr->extra); |
718e3744 | 1205 | |
73ac8160 DS |
1206 | /* Metric is currently based on the best-path only. */ |
1207 | metric = info->attr->med; | |
1208 | ||
1209 | if (bgp->table_map[afi][safi].name) | |
1210 | { | |
1211 | BGP_INFO_ATTR_BUF_INIT(); | |
718e3744 | 1212 | |
73ac8160 DS |
1213 | /* Copy info and attributes, so the route-map apply doesn't modify the |
1214 | BGP route info. */ | |
1215 | BGP_INFO_ATTR_BUF_COPY(info, info_cp); | |
1216 | if (bgp_table_map_apply(bgp->table_map[afi][safi].map, p, info_cp)) | |
1217 | { | |
1218 | metric = info_cp->attr->med; | |
1219 | nexthop = bgp_info_to_ipv6_nexthop(info_cp); | |
0d9551dc DS |
1220 | |
1221 | if (info_cp->attr->extra) | |
1222 | tag = info_cp->attr->extra->tag; | |
73ac8160 DS |
1223 | } |
1224 | BGP_INFO_ATTR_BUF_FREE(info_cp); | |
1225 | } | |
1226 | else | |
1227 | { | |
1228 | nexthop = bgp_info_to_ipv6_nexthop(info); | |
1229 | } | |
718e3744 | 1230 | |
73ac8160 DS |
1231 | if (nexthop) |
1232 | { | |
801a9bcc | 1233 | if (info->attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) |
73ac8160 DS |
1234 | if (info->peer->nexthop.ifp) |
1235 | ifindex = info->peer->nexthop.ifp->ifindex; | |
1236 | ||
1237 | if (!ifindex) | |
ffd0c037 DS |
1238 | { |
1239 | if (info->peer->conf_if || info->peer->ifname) | |
1240 | ifindex = if_nametoindex (info->peer->conf_if ? info->peer->conf_if : info->peer->ifname); | |
1241 | else if (info->peer->nexthop.ifp) | |
1242 | ifindex = info->peer->nexthop.ifp->ifindex; | |
1243 | } | |
73ac8160 DS |
1244 | stream_put (bgp_nexthop_buf, &nexthop, sizeof (struct in6_addr *)); |
1245 | stream_put (bgp_ifindices_buf, &ifindex, sizeof (unsigned int)); | |
1246 | valid_nh_count++; | |
1247 | } | |
431aa9f9 DS |
1248 | |
1249 | for (mpinfo = bgp_info_mpath_first (info); mpinfo; | |
1250 | mpinfo = bgp_info_mpath_next (mpinfo)) | |
73ac8160 DS |
1251 | { |
1252 | ifindex = 0; | |
1253 | nexthop = NULL; | |
000830bd | 1254 | |
73ac8160 | 1255 | if (bgp->table_map[afi][safi].name) |
431aa9f9 | 1256 | { |
73ac8160 DS |
1257 | /* Copy info and attributes, so the route-map apply doesn't modify the |
1258 | BGP route info. */ | |
1259 | BGP_INFO_ATTR_BUF_COPY(mpinfo, info_cp); | |
1260 | if (bgp_table_map_apply(bgp->table_map[afi][safi].map, p, info_cp)) | |
1261 | nexthop = bgp_info_to_ipv6_nexthop(info_cp); | |
1262 | BGP_INFO_ATTR_BUF_FREE(info_cp); | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | nexthop = bgp_info_to_ipv6_nexthop(mpinfo); | |
431aa9f9 | 1267 | } |
431aa9f9 | 1268 | |
73ac8160 DS |
1269 | if (nexthop == NULL) |
1270 | continue; | |
1271 | ||
801a9bcc | 1272 | if (mpinfo->attr->extra->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) |
73ac8160 DS |
1273 | if (mpinfo->peer->nexthop.ifp) |
1274 | ifindex = mpinfo->peer->nexthop.ifp->ifindex; | |
000830bd DS |
1275 | |
1276 | if (!ifindex) | |
ffd0c037 DS |
1277 | { |
1278 | if (mpinfo->peer->conf_if || mpinfo->peer->ifname) | |
1279 | ifindex = if_nametoindex (mpinfo->peer->conf_if ? mpinfo->peer->conf_if : mpinfo->peer->ifname); | |
1280 | else if (mpinfo->peer->nexthop.ifp) | |
1281 | ifindex = mpinfo->peer->nexthop.ifp->ifindex; | |
1282 | } | |
73ac8160 DS |
1283 | if (ifindex == 0) |
1284 | continue; | |
431aa9f9 DS |
1285 | |
1286 | stream_put (bgp_nexthop_buf, &nexthop, sizeof (struct in6_addr *)); | |
1287 | stream_put (bgp_ifindices_buf, &ifindex, sizeof (unsigned int)); | |
1288 | valid_nh_count++; | |
73ac8160 | 1289 | } |
718e3744 | 1290 | |
1291 | /* Make Zebra API structure. */ | |
1292 | api.flags = flags; | |
1293 | api.type = ZEBRA_ROUTE_BGP; | |
7c8ff89e | 1294 | api.instance = 0; |
718e3744 | 1295 | api.message = 0; |
c7ec179a | 1296 | api.safi = safi; |
718e3744 | 1297 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); |
f992e2a9 DS |
1298 | |
1299 | /* Note that this currently only applies to Null0 routes for aggregates. | |
1300 | * ZEBRA_FLAG_BLACKHOLE signals zapi_ipv6_route to encode a special | |
1301 | * BLACKHOLE nexthop. We want to set api.nexthop_num to zero since we | |
1302 | * do not want to also encode the :: nexthop for the aggregate route. | |
1303 | */ | |
1304 | if (CHECK_FLAG(flags, ZEBRA_FLAG_BLACKHOLE)) | |
1305 | api.nexthop_num = 0; | |
1306 | else | |
1307 | api.nexthop_num = valid_nh_count; | |
1308 | ||
431aa9f9 | 1309 | api.nexthop = (struct in6_addr **)STREAM_DATA (bgp_nexthop_buf); |
718e3744 | 1310 | SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX); |
431aa9f9 DS |
1311 | api.ifindex_num = valid_nh_count; |
1312 | api.ifindex = (unsigned int *)STREAM_DATA (bgp_ifindices_buf); | |
718e3744 | 1313 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); |
73ac8160 | 1314 | api.metric = metric; |
718e3744 | 1315 | |
0d9551dc DS |
1316 | if (tag) |
1317 | { | |
1318 | SET_FLAG (api.message, ZAPI_MESSAGE_TAG); | |
1319 | api.tag = tag; | |
1320 | } | |
1321 | ||
8a92a8a0 | 1322 | if (p->family == AF_INET) |
73ac8160 | 1323 | { |
8a92a8a0 DS |
1324 | if (bgp_debug_zebra(p)) |
1325 | { | |
1326 | int i; | |
1327 | zlog_debug("Zebra send: IPv4 route %s %s/%d metric %u tag %d", | |
1328 | valid_nh_count ? "add" : "delete", | |
1329 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], sizeof(buf[0])), | |
1330 | p->prefixlen, api.metric, api.tag); | |
1331 | for (i = 0; i < api.nexthop_num; i++) | |
1332 | zlog_debug(" IPv6 [nexthop %d] %s", i+1, | |
1333 | inet_ntop(AF_INET6, api.nexthop[i], buf[1], sizeof(buf[1]))); | |
1334 | } | |
1335 | ||
1336 | if (valid_nh_count) | |
1337 | zapi_ipv4_route_ipv6_nexthop (ZEBRA_IPV4_ROUTE_IPV6_NEXTHOP_ADD, | |
1338 | zclient, (struct prefix_ipv4 *) p, &api); | |
1339 | else | |
1340 | zapi_ipv4_route (ZEBRA_IPV4_ROUTE_DELETE, | |
1341 | zclient, (struct prefix_ipv4 *) p, &api); | |
73ac8160 | 1342 | } |
8a92a8a0 DS |
1343 | else |
1344 | { | |
1345 | if (bgp_debug_zebra(p)) | |
1346 | { | |
1347 | int i; | |
1348 | zlog_debug("Zebra send: IPv6 route %s %s/%d metric %u tag %d", | |
1349 | valid_nh_count ? "add" : "delete", | |
1350 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], sizeof(buf[0])), | |
1351 | p->prefixlen, api.metric, api.tag); | |
1352 | for (i = 0; i < api.nexthop_num; i++) | |
1353 | zlog_debug(" IPv6 [nexthop %d] %s", i+1, | |
1354 | inet_ntop(AF_INET6, api.nexthop[i], buf[1], sizeof(buf[1]))); | |
1355 | } | |
a39275d7 | 1356 | |
8a92a8a0 DS |
1357 | zapi_ipv6_route (valid_nh_count ? |
1358 | ZEBRA_IPV6_ROUTE_ADD : ZEBRA_IPV6_ROUTE_DELETE, | |
1359 | zclient, (struct prefix_ipv6 *) p, &api); | |
1360 | } | |
718e3744 | 1361 | } |
1362 | #endif /* HAVE_IPV6 */ | |
1363 | } | |
1364 | ||
73ac8160 DS |
1365 | /* Announce all routes of a table to zebra */ |
1366 | void | |
1367 | bgp_zebra_announce_table (struct bgp *bgp, afi_t afi, safi_t safi) | |
1368 | { | |
1369 | struct bgp_node *rn; | |
1370 | struct bgp_table *table; | |
1371 | struct bgp_info *ri; | |
1372 | ||
1373 | table = bgp->rib[afi][safi]; | |
4a16ae86 | 1374 | if (!table) return; |
73ac8160 DS |
1375 | |
1376 | for (rn = bgp_table_top (table); rn; rn = bgp_route_next (rn)) | |
1377 | for (ri = rn->info; ri; ri = ri->next) | |
1378 | if (CHECK_FLAG (ri->flags, BGP_INFO_SELECTED) | |
1379 | && ri->type == ZEBRA_ROUTE_BGP | |
1380 | && ri->sub_type == BGP_ROUTE_NORMAL) | |
1381 | bgp_zebra_announce (&rn->p, ri, bgp, afi, safi); | |
1382 | } | |
1383 | ||
718e3744 | 1384 | void |
5a616c08 | 1385 | bgp_zebra_withdraw (struct prefix *p, struct bgp_info *info, safi_t safi) |
718e3744 | 1386 | { |
1387 | int flags; | |
1388 | struct peer *peer; | |
1389 | ||
1390 | if (zclient->sock < 0) | |
1391 | return; | |
1392 | ||
8bb0831e DS |
1393 | if ((p->family == AF_INET && !zclient->redist[AFI_IP][ZEBRA_ROUTE_BGP].enabled) |
1394 | || (p->family == AF_INET6 && !zclient->redist[AFI_IP6][ZEBRA_ROUTE_BGP].enabled)) | |
718e3744 | 1395 | return; |
1396 | ||
1397 | peer = info->peer; | |
4a16ae86 | 1398 | |
718e3744 | 1399 | flags = 0; |
1400 | ||
6d85b15b | 1401 | if (peer->sort == BGP_PEER_IBGP) |
718e3744 | 1402 | { |
1403 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); | |
1404 | SET_FLAG (flags, ZEBRA_FLAG_IBGP); | |
1405 | } | |
1406 | ||
6d85b15b | 1407 | if ((peer->sort == BGP_PEER_EBGP && peer->ttl != 1) |
907f92c8 DS |
1408 | || CHECK_FLAG (peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK) |
1409 | || bgp_flag_check(peer->bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK)) | |
718e3744 | 1410 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); |
1411 | ||
1412 | if (p->family == AF_INET) | |
1413 | { | |
1414 | struct zapi_ipv4 api; | |
718e3744 | 1415 | |
1416 | api.flags = flags; | |
718e3744 | 1417 | |
1418 | api.type = ZEBRA_ROUTE_BGP; | |
7c8ff89e | 1419 | api.instance = 0; |
718e3744 | 1420 | api.message = 0; |
5a616c08 | 1421 | api.safi = safi; |
718e3744 | 1422 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); |
76145957 DS |
1423 | api.nexthop_num = 0; |
1424 | api.nexthop = NULL; | |
718e3744 | 1425 | api.ifindex_num = 0; |
1426 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); | |
1427 | api.metric = info->attr->med; | |
1428 | ||
0d9551dc DS |
1429 | if ((info->attr->extra) && (info->attr->extra->tag != 0)) |
1430 | { | |
1431 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
1432 | api.tag = info->attr->extra->tag; | |
1433 | } | |
1434 | ||
16286195 | 1435 | if (bgp_debug_zebra(p)) |
a39275d7 AS |
1436 | { |
1437 | char buf[2][INET_ADDRSTRLEN]; | |
fbf288a5 | 1438 | zlog_debug("Zebra send: IPv4 route delete %s/%d metric %u tag %d", |
a39275d7 | 1439 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], sizeof(buf[0])), |
fbf288a5 | 1440 | p->prefixlen, api.metric, api.tag); |
a39275d7 AS |
1441 | } |
1442 | ||
0a589359 | 1443 | zapi_ipv4_route (ZEBRA_IPV4_ROUTE_DELETE, zclient, |
1444 | (struct prefix_ipv4 *) p, &api); | |
718e3744 | 1445 | } |
1446 | #ifdef HAVE_IPV6 | |
1447 | /* We have to think about a IPv6 link-local address curse. */ | |
1448 | if (p->family == AF_INET6) | |
1449 | { | |
1450 | struct zapi_ipv6 api; | |
fb982c25 PJ |
1451 | |
1452 | assert (info->attr->extra); | |
1453 | ||
718e3744 | 1454 | api.flags = flags; |
1455 | api.type = ZEBRA_ROUTE_BGP; | |
7c8ff89e | 1456 | api.instance = 0; |
718e3744 | 1457 | api.message = 0; |
c7ec179a | 1458 | api.safi = safi; |
718e3744 | 1459 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); |
fbf288a5 DS |
1460 | api.nexthop_num = 0; |
1461 | api.nexthop = NULL; | |
1462 | api.ifindex_num = 0; | |
718e3744 | 1463 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); |
1464 | api.metric = info->attr->med; | |
1465 | ||
0d9551dc DS |
1466 | if ((info->attr->extra) && (info->attr->extra->tag != 0)) |
1467 | { | |
1468 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
1469 | api.tag = info->attr->extra->tag; | |
1470 | } | |
1471 | ||
16286195 | 1472 | if (bgp_debug_zebra(p)) |
a39275d7 AS |
1473 | { |
1474 | char buf[2][INET6_ADDRSTRLEN]; | |
fbf288a5 | 1475 | zlog_debug("Zebra send: IPv6 route delete %s/%d metric %u tag %d", |
a39275d7 | 1476 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], sizeof(buf[0])), |
fbf288a5 | 1477 | p->prefixlen, api.metric, api.tag); |
a39275d7 AS |
1478 | } |
1479 | ||
0a589359 | 1480 | zapi_ipv6_route (ZEBRA_IPV6_ROUTE_DELETE, zclient, |
1481 | (struct prefix_ipv6 *) p, &api); | |
718e3744 | 1482 | } |
1483 | #endif /* HAVE_IPV6 */ | |
1484 | } | |
7c8ff89e DS |
1485 | struct bgp_redist * |
1486 | bgp_redist_lookup (struct bgp *bgp, afi_t afi, u_char type, u_short instance) | |
1487 | { | |
1488 | struct list *red_list; | |
1489 | struct listnode *node; | |
1490 | struct bgp_redist *red; | |
1491 | ||
1492 | red_list = bgp->redist[afi][type]; | |
1493 | if (!red_list) | |
1494 | return(NULL); | |
1495 | ||
1496 | for (ALL_LIST_ELEMENTS_RO(red_list, node, red)) | |
1497 | if (red->instance == instance) | |
1498 | return red; | |
1499 | ||
1500 | return NULL; | |
1501 | } | |
1502 | ||
1503 | struct bgp_redist * | |
1504 | bgp_redist_add (struct bgp *bgp, afi_t afi, u_char type, u_short instance) | |
1505 | { | |
1506 | struct list *red_list; | |
1507 | struct bgp_redist *red; | |
1508 | ||
1509 | red = bgp_redist_lookup(bgp, afi, type, instance); | |
1510 | if (red) | |
1511 | return red; | |
1512 | ||
1513 | if (!bgp->redist[afi][type]) | |
1514 | bgp->redist[afi][type] = list_new(); | |
1515 | ||
1516 | red_list = bgp->redist[afi][type]; | |
1517 | red = (struct bgp_redist *)calloc (1, sizeof(struct bgp_redist)); | |
1518 | red->instance = instance; | |
1519 | ||
1520 | listnode_add(red_list, red); | |
1521 | ||
1522 | return red; | |
1523 | } | |
1524 | ||
1525 | static void | |
1526 | bgp_redist_del (struct bgp *bgp, afi_t afi, u_char type, u_short instance) | |
1527 | { | |
1528 | struct bgp_redist *red; | |
1529 | ||
1530 | red = bgp_redist_lookup(bgp, afi, type, instance); | |
1531 | ||
1532 | if (red) | |
1533 | { | |
1534 | listnode_delete(bgp->redist[afi][type], red); | |
1535 | if (!bgp->redist[afi][type]->count) | |
1536 | { | |
1537 | list_free(bgp->redist[afi][type]); | |
1538 | bgp->redist[afi][type] = NULL; | |
1539 | } | |
1540 | } | |
1541 | } | |
6b0655a2 | 1542 | |
718e3744 | 1543 | /* Other routes redistribution into BGP. */ |
1544 | int | |
8bb0831e | 1545 | bgp_redistribute_set (afi_t afi, int type, u_short instance) |
718e3744 | 1546 | { |
718e3744 | 1547 | |
1548 | /* Return if already redistribute flag is set. */ | |
8bb0831e | 1549 | if (redist_check_instance(&zclient->redist[afi][type], instance)) |
718e3744 | 1550 | return CMD_WARNING; |
1551 | ||
8bb0831e | 1552 | redist_add_instance(&zclient->redist[afi][type], instance); |
718e3744 | 1553 | |
1554 | /* Return if zebra connection is not established. */ | |
1555 | if (zclient->sock < 0) | |
1556 | return CMD_WARNING; | |
a39275d7 | 1557 | |
16286195 | 1558 | if (BGP_DEBUG (zebra, ZEBRA)) |
8bb0831e DS |
1559 | zlog_debug("Zebra send: redistribute add afi %d %s %d", afi, |
1560 | zebra_route_string(type), instance); | |
518f0eb1 | 1561 | |
718e3744 | 1562 | /* Send distribute add message to zebra. */ |
8bb0831e | 1563 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, instance); |
718e3744 | 1564 | |
1565 | return CMD_SUCCESS; | |
1566 | } | |
1567 | ||
518f0eb1 | 1568 | int |
7c8ff89e | 1569 | bgp_redistribute_resend (struct bgp *bgp, afi_t afi, int type, u_short instance) |
518f0eb1 DS |
1570 | { |
1571 | /* Return if zebra connection is not established. */ | |
1572 | if (zclient->sock < 0) | |
1573 | return -1; | |
1574 | ||
16286195 | 1575 | if (BGP_DEBUG (zebra, ZEBRA)) |
8bb0831e DS |
1576 | zlog_debug("Zebra send: redistribute delete/add afi %d %s %d", afi, |
1577 | zebra_route_string(type), instance); | |
518f0eb1 DS |
1578 | |
1579 | /* Send distribute add message to zebra. */ | |
8bb0831e DS |
1580 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, type, instance); |
1581 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, instance); | |
518f0eb1 DS |
1582 | |
1583 | return 0; | |
1584 | } | |
1585 | ||
718e3744 | 1586 | /* Redistribute with route-map specification. */ |
1587 | int | |
7c8ff89e | 1588 | bgp_redistribute_rmap_set (struct bgp_redist *red, const char *name) |
718e3744 | 1589 | { |
7c8ff89e DS |
1590 | if (red->rmap.name |
1591 | && (strcmp (red->rmap.name, name) == 0)) | |
718e3744 | 1592 | return 0; |
1593 | ||
7c8ff89e DS |
1594 | if (red->rmap.name) |
1595 | free (red->rmap.name); | |
1596 | red->rmap.name = strdup (name); | |
1597 | red->rmap.map = route_map_lookup_by_name (name); | |
718e3744 | 1598 | |
1599 | return 1; | |
1600 | } | |
1601 | ||
1602 | /* Redistribute with metric specification. */ | |
1603 | int | |
7c8ff89e | 1604 | bgp_redistribute_metric_set (struct bgp_redist *red, u_int32_t metric) |
718e3744 | 1605 | { |
7c8ff89e DS |
1606 | if (red->redist_metric_flag |
1607 | && red->redist_metric == metric) | |
718e3744 | 1608 | return 0; |
1609 | ||
7c8ff89e DS |
1610 | red->redist_metric_flag = 1; |
1611 | red->redist_metric = metric; | |
718e3744 | 1612 | |
1613 | return 1; | |
1614 | } | |
1615 | ||
1616 | /* Unset redistribution. */ | |
1617 | int | |
7c8ff89e | 1618 | bgp_redistribute_unset (struct bgp *bgp, afi_t afi, int type, u_short instance) |
718e3744 | 1619 | { |
7c8ff89e DS |
1620 | struct bgp_redist *red; |
1621 | ||
1622 | red = bgp_redist_lookup(bgp, afi, type, instance); | |
1623 | if (!red) | |
1624 | return CMD_SUCCESS; | |
718e3744 | 1625 | |
1626 | /* Unset route-map. */ | |
7c8ff89e DS |
1627 | if (red->rmap.name) |
1628 | free (red->rmap.name); | |
1629 | red->rmap.name = NULL; | |
1630 | red->rmap.map = NULL; | |
718e3744 | 1631 | |
1632 | /* Unset metric. */ | |
7c8ff89e DS |
1633 | red->redist_metric_flag = 0; |
1634 | red->redist_metric = 0; | |
1635 | ||
1636 | bgp_redist_del(bgp, afi, type, instance); | |
718e3744 | 1637 | |
1638 | /* Return if zebra connection is disabled. */ | |
8bb0831e | 1639 | if (!redist_check_instance(&zclient->redist[afi][type], instance)) |
718e3744 | 1640 | return CMD_WARNING; |
8bb0831e | 1641 | redist_del_instance(&zclient->redist[afi][type], instance); |
718e3744 | 1642 | |
8bb0831e | 1643 | if (zclient->sock >= 0) |
a39275d7 AS |
1644 | { |
1645 | /* Send distribute delete message to zebra. */ | |
16286195 | 1646 | if (BGP_DEBUG (zebra, ZEBRA)) |
8bb0831e DS |
1647 | zlog_debug("Zebra send: redistribute delete afi %d %s %d", |
1648 | afi, zebra_route_string(type), instance); | |
1649 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, type, instance); | |
a39275d7 | 1650 | } |
718e3744 | 1651 | |
1652 | /* Withdraw redistributed routes from current BGP's routing table. */ | |
7c8ff89e | 1653 | bgp_redistribute_withdraw (bgp, afi, type, instance); |
718e3744 | 1654 | |
1655 | return CMD_SUCCESS; | |
1656 | } | |
1657 | ||
718e3744 | 1658 | void |
94f2b392 | 1659 | bgp_zclient_reset (void) |
718e3744 | 1660 | { |
1661 | zclient_reset (zclient); | |
1662 | } | |
1663 | ||
1664 | void | |
94f2b392 | 1665 | bgp_zebra_init (void) |
718e3744 | 1666 | { |
1667 | /* Set default values. */ | |
1668 | zclient = zclient_new (); | |
7c8ff89e | 1669 | zclient_init (zclient, ZEBRA_ROUTE_BGP, 0); |
18a6dce6 | 1670 | zclient->router_id_update = bgp_router_id_update; |
718e3744 | 1671 | zclient->interface_add = bgp_interface_add; |
1672 | zclient->interface_delete = bgp_interface_delete; | |
1673 | zclient->interface_address_add = bgp_interface_address_add; | |
1674 | zclient->interface_address_delete = bgp_interface_address_delete; | |
a80beece DS |
1675 | zclient->interface_nbr_address_add = bgp_interface_nbr_address_add; |
1676 | zclient->interface_nbr_address_delete = bgp_interface_nbr_address_delete; | |
718e3744 | 1677 | zclient->ipv4_route_add = zebra_read_ipv4; |
1678 | zclient->ipv4_route_delete = zebra_read_ipv4; | |
1679 | zclient->interface_up = bgp_interface_up; | |
1680 | zclient->interface_down = bgp_interface_down; | |
1681 | #ifdef HAVE_IPV6 | |
1682 | zclient->ipv6_route_add = zebra_read_ipv6; | |
1683 | zclient->ipv6_route_delete = zebra_read_ipv6; | |
1684 | #endif /* HAVE_IPV6 */ | |
fb018d25 | 1685 | zclient->nexthop_update = bgp_read_nexthop_update; |
078430f6 | 1686 | zclient->import_check_update = bgp_read_import_check_update; |
718e3744 | 1687 | |
1688 | /* Interface related init. */ | |
1689 | if_init (); | |
8196f13d JB |
1690 | |
1691 | bgp_nexthop_buf = stream_new(BGP_NEXTHOP_BUF_SIZE); | |
431aa9f9 | 1692 | bgp_ifindices_buf = stream_new(BGP_IFINDICES_BUF_SIZE); |
718e3744 | 1693 | } |