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Commit | Line | Data |
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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" | |
32 | ||
33 | #include "bgpd/bgpd.h" | |
34 | #include "bgpd/bgp_route.h" | |
35 | #include "bgpd/bgp_attr.h" | |
36 | #include "bgpd/bgp_nexthop.h" | |
37 | #include "bgpd/bgp_zebra.h" | |
38 | #include "bgpd/bgp_fsm.h" | |
a39275d7 | 39 | #include "bgpd/bgp_debug.h" |
718e3744 | 40 | \f |
41 | /* All information about zebra. */ | |
228da428 | 42 | struct zclient *zclient = NULL; |
18a6dce6 | 43 | struct in_addr router_id_zebra; |
718e3744 | 44 | |
18a6dce6 | 45 | /* Router-id update message from zebra. */ |
94f2b392 | 46 | static int |
18a6dce6 | 47 | bgp_router_id_update (int command, struct zclient *zclient, zebra_size_t length) |
718e3744 | 48 | { |
18a6dce6 | 49 | struct prefix router_id; |
1eb8ef25 | 50 | struct listnode *node, *nnode; |
18a6dce6 | 51 | struct bgp *bgp; |
718e3744 | 52 | |
18a6dce6 | 53 | zebra_router_id_update_read(zclient->ibuf,&router_id); |
a39275d7 AS |
54 | |
55 | if (BGP_DEBUG(zebra, ZEBRA)) | |
56 | { | |
57 | char buf[128]; | |
58 | prefix2str(&router_id, buf, sizeof(buf)); | |
59 | zlog_debug("Zebra rcvd: router id update %s", buf); | |
60 | } | |
61 | ||
18a6dce6 | 62 | router_id_zebra = router_id.u.prefix4; |
718e3744 | 63 | |
1eb8ef25 | 64 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) |
718e3744 | 65 | { |
18a6dce6 | 66 | if (!bgp->router_id_static.s_addr) |
1eb8ef25 | 67 | bgp_router_id_set (bgp, &router_id.u.prefix4); |
718e3744 | 68 | } |
18a6dce6 | 69 | |
718e3744 | 70 | return 0; |
71 | } | |
72 | ||
73 | /* Inteface addition message from zebra. */ | |
94f2b392 | 74 | static int |
718e3744 | 75 | bgp_interface_add (int command, struct zclient *zclient, zebra_size_t length) |
76 | { | |
77 | struct interface *ifp; | |
78 | ||
79 | ifp = zebra_interface_add_read (zclient->ibuf); | |
718e3744 | 80 | |
a39275d7 AS |
81 | if (BGP_DEBUG(zebra, ZEBRA) && ifp) |
82 | zlog_debug("Zebra rcvd: interface add %s", ifp->name); | |
83 | ||
718e3744 | 84 | return 0; |
85 | } | |
86 | ||
94f2b392 | 87 | static int |
718e3744 | 88 | bgp_interface_delete (int command, struct zclient *zclient, |
89 | zebra_size_t length) | |
90 | { | |
91 | struct stream *s; | |
92 | struct interface *ifp; | |
93 | ||
94 | s = zclient->ibuf; | |
95 | ifp = zebra_interface_state_read (s); | |
d2fc8896 | 96 | ifp->ifindex = IFINDEX_INTERNAL; |
718e3744 | 97 | |
a39275d7 AS |
98 | if (BGP_DEBUG(zebra, ZEBRA)) |
99 | zlog_debug("Zebra rcvd: interface delete %s", ifp->name); | |
100 | ||
718e3744 | 101 | return 0; |
102 | } | |
103 | ||
94f2b392 | 104 | static int |
718e3744 | 105 | bgp_interface_up (int command, struct zclient *zclient, zebra_size_t length) |
106 | { | |
107 | struct stream *s; | |
108 | struct interface *ifp; | |
109 | struct connected *c; | |
1eb8ef25 | 110 | struct listnode *node, *nnode; |
718e3744 | 111 | |
112 | s = zclient->ibuf; | |
113 | ifp = zebra_interface_state_read (s); | |
114 | ||
115 | if (! ifp) | |
116 | return 0; | |
117 | ||
a39275d7 AS |
118 | if (BGP_DEBUG(zebra, ZEBRA)) |
119 | zlog_debug("Zebra rcvd: interface %s up", ifp->name); | |
120 | ||
1eb8ef25 | 121 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c)) |
122 | bgp_connected_add (c); | |
718e3744 | 123 | |
124 | return 0; | |
125 | } | |
126 | ||
94f2b392 | 127 | static int |
718e3744 | 128 | bgp_interface_down (int command, struct zclient *zclient, zebra_size_t length) |
129 | { | |
130 | struct stream *s; | |
131 | struct interface *ifp; | |
132 | struct connected *c; | |
1eb8ef25 | 133 | struct listnode *node, *nnode; |
718e3744 | 134 | |
135 | s = zclient->ibuf; | |
136 | ifp = zebra_interface_state_read (s); | |
137 | if (! ifp) | |
138 | return 0; | |
139 | ||
a39275d7 AS |
140 | if (BGP_DEBUG(zebra, ZEBRA)) |
141 | zlog_debug("Zebra rcvd: interface %s down", ifp->name); | |
142 | ||
1eb8ef25 | 143 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c)) |
144 | bgp_connected_delete (c); | |
718e3744 | 145 | |
146 | /* Fast external-failover (Currently IPv4 only) */ | |
147 | { | |
1eb8ef25 | 148 | struct listnode *mnode; |
718e3744 | 149 | struct bgp *bgp; |
150 | struct peer *peer; | |
151 | struct interface *peer_if; | |
152 | ||
1eb8ef25 | 153 | for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp)) |
718e3744 | 154 | { |
155 | if (CHECK_FLAG (bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER)) | |
156 | continue; | |
157 | ||
1eb8ef25 | 158 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) |
718e3744 | 159 | { |
160 | if (peer->ttl != 1) | |
161 | continue; | |
162 | ||
163 | if (peer->su.sa.sa_family == AF_INET) | |
164 | peer_if = if_lookup_by_ipv4 (&peer->su.sin.sin_addr); | |
165 | else | |
166 | continue; | |
167 | ||
168 | if (ifp == peer_if) | |
169 | BGP_EVENT_ADD (peer, BGP_Stop); | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
94f2b392 | 177 | static int |
718e3744 | 178 | bgp_interface_address_add (int command, struct zclient *zclient, |
179 | zebra_size_t length) | |
180 | { | |
181 | struct connected *ifc; | |
182 | ||
0a589359 | 183 | ifc = zebra_interface_address_read (command, zclient->ibuf); |
718e3744 | 184 | |
185 | if (ifc == NULL) | |
186 | return 0; | |
187 | ||
a39275d7 AS |
188 | if (BGP_DEBUG(zebra, ZEBRA)) |
189 | { | |
190 | char buf[128]; | |
191 | prefix2str(ifc->address, buf, sizeof(buf)); | |
192 | zlog_debug("Zebra rcvd: interface %s address add %s", | |
193 | ifc->ifp->name, buf); | |
194 | } | |
195 | ||
2e3b2e47 | 196 | if (if_is_operative (ifc->ifp)) |
718e3744 | 197 | bgp_connected_add (ifc); |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
94f2b392 | 202 | static int |
718e3744 | 203 | bgp_interface_address_delete (int command, struct zclient *zclient, |
204 | zebra_size_t length) | |
205 | { | |
206 | struct connected *ifc; | |
207 | ||
0a589359 | 208 | ifc = zebra_interface_address_read (command, zclient->ibuf); |
718e3744 | 209 | |
210 | if (ifc == NULL) | |
211 | return 0; | |
212 | ||
a39275d7 AS |
213 | if (BGP_DEBUG(zebra, ZEBRA)) |
214 | { | |
215 | char buf[128]; | |
216 | prefix2str(ifc->address, buf, sizeof(buf)); | |
217 | zlog_debug("Zebra rcvd: interface %s address delete %s", | |
218 | ifc->ifp->name, buf); | |
219 | } | |
220 | ||
2e3b2e47 | 221 | if (if_is_operative (ifc->ifp)) |
718e3744 | 222 | bgp_connected_delete (ifc); |
223 | ||
224 | connected_free (ifc); | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | /* Zebra route add and delete treatment. */ | |
94f2b392 | 230 | static int |
718e3744 | 231 | zebra_read_ipv4 (int command, struct zclient *zclient, zebra_size_t length) |
232 | { | |
233 | struct stream *s; | |
234 | struct zapi_ipv4 api; | |
235 | unsigned long ifindex; | |
236 | struct in_addr nexthop; | |
237 | struct prefix_ipv4 p; | |
238 | ||
239 | s = zclient->ibuf; | |
240 | ifindex = 0; | |
241 | nexthop.s_addr = 0; | |
242 | ||
243 | /* Type, flags, message. */ | |
244 | api.type = stream_getc (s); | |
245 | api.flags = stream_getc (s); | |
246 | api.message = stream_getc (s); | |
247 | ||
248 | /* IPv4 prefix. */ | |
249 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
250 | p.family = AF_INET; | |
251 | p.prefixlen = stream_getc (s); | |
252 | stream_get (&p.prefix, s, PSIZE (p.prefixlen)); | |
253 | ||
254 | /* Nexthop, ifindex, distance, metric. */ | |
255 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP)) | |
256 | { | |
257 | api.nexthop_num = stream_getc (s); | |
258 | nexthop.s_addr = stream_get_ipv4 (s); | |
259 | } | |
260 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX)) | |
261 | { | |
262 | api.ifindex_num = stream_getc (s); | |
263 | ifindex = stream_getl (s); | |
264 | } | |
265 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE)) | |
266 | api.distance = stream_getc (s); | |
267 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC)) | |
268 | api.metric = stream_getl (s); | |
269 | else | |
270 | api.metric = 0; | |
271 | ||
272 | if (command == ZEBRA_IPV4_ROUTE_ADD) | |
a39275d7 AS |
273 | { |
274 | if (BGP_DEBUG(zebra, ZEBRA)) | |
275 | { | |
276 | char buf[2][INET_ADDRSTRLEN]; | |
277 | zlog_debug("Zebra rcvd: IPv4 route add %s %s/%d nexthop %s metric %u", | |
278 | zebra_route_string(api.type), | |
279 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), | |
280 | p.prefixlen, | |
281 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
282 | api.metric); | |
283 | } | |
284 | bgp_redistribute_add((struct prefix *)&p, &nexthop, api.metric, api.type); | |
285 | } | |
718e3744 | 286 | else |
a39275d7 AS |
287 | { |
288 | if (BGP_DEBUG(zebra, ZEBRA)) | |
289 | { | |
290 | char buf[2][INET_ADDRSTRLEN]; | |
291 | zlog_debug("Zebra rcvd: IPv4 route delete %s %s/%d " | |
292 | "nexthop %s metric %u", | |
293 | zebra_route_string(api.type), | |
294 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), | |
295 | p.prefixlen, | |
296 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
297 | api.metric); | |
298 | } | |
299 | bgp_redistribute_delete((struct prefix *)&p, api.type); | |
300 | } | |
718e3744 | 301 | |
302 | return 0; | |
303 | } | |
304 | ||
305 | #ifdef HAVE_IPV6 | |
306 | /* Zebra route add and delete treatment. */ | |
94f2b392 | 307 | static int |
718e3744 | 308 | zebra_read_ipv6 (int command, struct zclient *zclient, zebra_size_t length) |
309 | { | |
310 | struct stream *s; | |
311 | struct zapi_ipv6 api; | |
312 | unsigned long ifindex; | |
313 | struct in6_addr nexthop; | |
314 | struct prefix_ipv6 p; | |
315 | ||
316 | s = zclient->ibuf; | |
317 | ifindex = 0; | |
318 | memset (&nexthop, 0, sizeof (struct in6_addr)); | |
319 | ||
320 | /* Type, flags, message. */ | |
321 | api.type = stream_getc (s); | |
322 | api.flags = stream_getc (s); | |
323 | api.message = stream_getc (s); | |
324 | ||
325 | /* IPv6 prefix. */ | |
326 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
327 | p.family = AF_INET6; | |
328 | p.prefixlen = stream_getc (s); | |
329 | stream_get (&p.prefix, s, PSIZE (p.prefixlen)); | |
330 | ||
331 | /* Nexthop, ifindex, distance, metric. */ | |
332 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP)) | |
333 | { | |
334 | api.nexthop_num = stream_getc (s); | |
335 | stream_get (&nexthop, s, 16); | |
336 | } | |
337 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX)) | |
338 | { | |
339 | api.ifindex_num = stream_getc (s); | |
340 | ifindex = stream_getl (s); | |
341 | } | |
342 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE)) | |
343 | api.distance = stream_getc (s); | |
344 | else | |
345 | api.distance = 0; | |
346 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC)) | |
347 | api.metric = stream_getl (s); | |
348 | else | |
349 | api.metric = 0; | |
350 | ||
351 | /* Simply ignore link-local address. */ | |
352 | if (IN6_IS_ADDR_LINKLOCAL (&p.prefix)) | |
353 | return 0; | |
354 | ||
355 | if (command == ZEBRA_IPV6_ROUTE_ADD) | |
a39275d7 AS |
356 | { |
357 | if (BGP_DEBUG(zebra, ZEBRA)) | |
358 | { | |
359 | char buf[INET6_ADDRSTRLEN]; | |
360 | zlog_debug("Zebra rcvd: IPv6 route add %s %s/%d metric %u", | |
361 | zebra_route_string(api.type), | |
362 | inet_ntop(AF_INET6, &p.prefix, buf, sizeof(buf)), | |
363 | p.prefixlen, api.metric); | |
364 | } | |
365 | bgp_redistribute_add ((struct prefix *)&p, NULL, api.metric, api.type); | |
366 | } | |
718e3744 | 367 | else |
a39275d7 AS |
368 | { |
369 | if (BGP_DEBUG(zebra, ZEBRA)) | |
370 | { | |
371 | char buf[INET6_ADDRSTRLEN]; | |
372 | zlog_debug("Zebra rcvd: IPv6 route delete %s %s/%d metric %u", | |
373 | zebra_route_string(api.type), | |
374 | inet_ntop(AF_INET6, &p.prefix, buf, sizeof(buf)), | |
375 | p.prefixlen, api.metric); | |
376 | } | |
377 | bgp_redistribute_delete ((struct prefix *) &p, api.type); | |
378 | } | |
718e3744 | 379 | |
380 | return 0; | |
381 | } | |
382 | #endif /* HAVE_IPV6 */ | |
383 | \f | |
384 | struct interface * | |
385 | if_lookup_by_ipv4 (struct in_addr *addr) | |
386 | { | |
52dc7ee6 | 387 | struct listnode *ifnode; |
388 | struct listnode *cnode; | |
718e3744 | 389 | struct interface *ifp; |
390 | struct connected *connected; | |
391 | struct prefix_ipv4 p; | |
392 | struct prefix *cp; | |
393 | ||
394 | p.family = AF_INET; | |
395 | p.prefix = *addr; | |
396 | p.prefixlen = IPV4_MAX_BITLEN; | |
397 | ||
1eb8ef25 | 398 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 399 | { |
1eb8ef25 | 400 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 401 | { |
718e3744 | 402 | cp = connected->address; |
403 | ||
404 | if (cp->family == AF_INET) | |
405 | if (prefix_match (cp, (struct prefix *)&p)) | |
406 | return ifp; | |
407 | } | |
408 | } | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | struct interface * | |
413 | if_lookup_by_ipv4_exact (struct in_addr *addr) | |
414 | { | |
52dc7ee6 | 415 | struct listnode *ifnode; |
416 | struct listnode *cnode; | |
718e3744 | 417 | struct interface *ifp; |
418 | struct connected *connected; | |
419 | struct prefix *cp; | |
420 | ||
1eb8ef25 | 421 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 422 | { |
1eb8ef25 | 423 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 424 | { |
718e3744 | 425 | cp = connected->address; |
426 | ||
427 | if (cp->family == AF_INET) | |
428 | if (IPV4_ADDR_SAME (&cp->u.prefix4, addr)) | |
429 | return ifp; | |
430 | } | |
431 | } | |
432 | return NULL; | |
433 | } | |
434 | ||
435 | #ifdef HAVE_IPV6 | |
436 | struct interface * | |
437 | if_lookup_by_ipv6 (struct in6_addr *addr) | |
438 | { | |
52dc7ee6 | 439 | struct listnode *ifnode; |
440 | struct listnode *cnode; | |
718e3744 | 441 | struct interface *ifp; |
442 | struct connected *connected; | |
443 | struct prefix_ipv6 p; | |
444 | struct prefix *cp; | |
445 | ||
446 | p.family = AF_INET6; | |
447 | p.prefix = *addr; | |
448 | p.prefixlen = IPV6_MAX_BITLEN; | |
449 | ||
1eb8ef25 | 450 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 451 | { |
1eb8ef25 | 452 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 453 | { |
718e3744 | 454 | cp = connected->address; |
455 | ||
456 | if (cp->family == AF_INET6) | |
457 | if (prefix_match (cp, (struct prefix *)&p)) | |
458 | return ifp; | |
459 | } | |
460 | } | |
461 | return NULL; | |
462 | } | |
463 | ||
464 | struct interface * | |
465 | if_lookup_by_ipv6_exact (struct in6_addr *addr) | |
466 | { | |
52dc7ee6 | 467 | struct listnode *ifnode; |
468 | struct listnode *cnode; | |
718e3744 | 469 | struct interface *ifp; |
470 | struct connected *connected; | |
471 | struct prefix *cp; | |
472 | ||
1eb8ef25 | 473 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 474 | { |
1eb8ef25 | 475 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 476 | { |
718e3744 | 477 | cp = connected->address; |
478 | ||
479 | if (cp->family == AF_INET6) | |
480 | if (IPV6_ADDR_SAME (&cp->u.prefix6, addr)) | |
481 | return ifp; | |
482 | } | |
483 | } | |
484 | return NULL; | |
485 | } | |
486 | ||
94f2b392 | 487 | static int |
718e3744 | 488 | if_get_ipv6_global (struct interface *ifp, struct in6_addr *addr) |
489 | { | |
52dc7ee6 | 490 | struct listnode *cnode; |
718e3744 | 491 | struct connected *connected; |
492 | struct prefix *cp; | |
493 | ||
1eb8ef25 | 494 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 495 | { |
718e3744 | 496 | cp = connected->address; |
497 | ||
498 | if (cp->family == AF_INET6) | |
499 | if (! IN6_IS_ADDR_LINKLOCAL (&cp->u.prefix6)) | |
500 | { | |
501 | memcpy (addr, &cp->u.prefix6, IPV6_MAX_BYTELEN); | |
502 | return 1; | |
503 | } | |
504 | } | |
505 | return 0; | |
506 | } | |
507 | ||
94f2b392 | 508 | static int |
718e3744 | 509 | if_get_ipv6_local (struct interface *ifp, struct in6_addr *addr) |
510 | { | |
52dc7ee6 | 511 | struct listnode *cnode; |
718e3744 | 512 | struct connected *connected; |
513 | struct prefix *cp; | |
514 | ||
1eb8ef25 | 515 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 516 | { |
718e3744 | 517 | cp = connected->address; |
518 | ||
519 | if (cp->family == AF_INET6) | |
520 | if (IN6_IS_ADDR_LINKLOCAL (&cp->u.prefix6)) | |
521 | { | |
522 | memcpy (addr, &cp->u.prefix6, IPV6_MAX_BYTELEN); | |
523 | return 1; | |
524 | } | |
525 | } | |
526 | return 0; | |
527 | } | |
528 | #endif /* HAVE_IPV6 */ | |
529 | ||
530 | int | |
531 | bgp_nexthop_set (union sockunion *local, union sockunion *remote, | |
532 | struct bgp_nexthop *nexthop, struct peer *peer) | |
533 | { | |
534 | int ret = 0; | |
535 | struct interface *ifp = NULL; | |
536 | ||
537 | memset (nexthop, 0, sizeof (struct bgp_nexthop)); | |
538 | ||
539 | if (!local) | |
540 | return -1; | |
541 | if (!remote) | |
542 | return -1; | |
543 | ||
544 | if (local->sa.sa_family == AF_INET) | |
545 | { | |
546 | nexthop->v4 = local->sin.sin_addr; | |
547 | ifp = if_lookup_by_ipv4 (&local->sin.sin_addr); | |
548 | } | |
549 | #ifdef HAVE_IPV6 | |
550 | if (local->sa.sa_family == AF_INET6) | |
551 | { | |
552 | if (IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr)) | |
553 | { | |
554 | if (peer->ifname) | |
555 | ifp = if_lookup_by_index (if_nametoindex (peer->ifname)); | |
556 | } | |
557 | else | |
558 | ifp = if_lookup_by_ipv6 (&local->sin6.sin6_addr); | |
559 | } | |
560 | #endif /* HAVE_IPV6 */ | |
561 | ||
562 | if (!ifp) | |
563 | return -1; | |
564 | ||
565 | nexthop->ifp = ifp; | |
566 | ||
567 | /* IPv4 connection. */ | |
568 | if (local->sa.sa_family == AF_INET) | |
569 | { | |
570 | #ifdef HAVE_IPV6 | |
571 | /* IPv6 nexthop*/ | |
572 | ret = if_get_ipv6_global (ifp, &nexthop->v6_global); | |
573 | ||
574 | /* There is no global nexthop. */ | |
575 | if (!ret) | |
576 | if_get_ipv6_local (ifp, &nexthop->v6_global); | |
577 | else | |
578 | if_get_ipv6_local (ifp, &nexthop->v6_local); | |
579 | #endif /* HAVE_IPV6 */ | |
580 | } | |
581 | ||
582 | #ifdef HAVE_IPV6 | |
583 | /* IPv6 connection. */ | |
584 | if (local->sa.sa_family == AF_INET6) | |
585 | { | |
586 | struct interface *direct = NULL; | |
587 | ||
588 | /* IPv4 nexthop. I don't care about it. */ | |
589 | if (peer->local_id.s_addr) | |
590 | nexthop->v4 = peer->local_id; | |
591 | ||
592 | /* Global address*/ | |
593 | if (! IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr)) | |
594 | { | |
595 | memcpy (&nexthop->v6_global, &local->sin6.sin6_addr, | |
596 | IPV6_MAX_BYTELEN); | |
597 | ||
598 | /* If directory connected set link-local address. */ | |
599 | direct = if_lookup_by_ipv6 (&remote->sin6.sin6_addr); | |
600 | if (direct) | |
601 | if_get_ipv6_local (ifp, &nexthop->v6_local); | |
602 | } | |
603 | else | |
604 | /* Link-local address. */ | |
605 | { | |
606 | ret = if_get_ipv6_global (ifp, &nexthop->v6_global); | |
607 | ||
608 | /* If there is no global address. Set link-local address as | |
609 | global. I know this break RFC specification... */ | |
610 | if (!ret) | |
611 | memcpy (&nexthop->v6_global, &local->sin6.sin6_addr, | |
612 | IPV6_MAX_BYTELEN); | |
613 | else | |
614 | memcpy (&nexthop->v6_local, &local->sin6.sin6_addr, | |
615 | IPV6_MAX_BYTELEN); | |
616 | } | |
617 | } | |
618 | ||
619 | if (IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr) || | |
620 | if_lookup_by_ipv6 (&remote->sin6.sin6_addr)) | |
621 | peer->shared_network = 1; | |
622 | else | |
623 | peer->shared_network = 0; | |
624 | ||
625 | /* KAME stack specific treatment. */ | |
626 | #ifdef KAME | |
627 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->v6_global) | |
628 | && IN6_LINKLOCAL_IFINDEX (nexthop->v6_global)) | |
629 | { | |
630 | SET_IN6_LINKLOCAL_IFINDEX (nexthop->v6_global, 0); | |
631 | } | |
632 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->v6_local) | |
633 | && IN6_LINKLOCAL_IFINDEX (nexthop->v6_local)) | |
634 | { | |
635 | SET_IN6_LINKLOCAL_IFINDEX (nexthop->v6_local, 0); | |
636 | } | |
637 | #endif /* KAME */ | |
638 | #endif /* HAVE_IPV6 */ | |
639 | return ret; | |
640 | } | |
641 | ||
642 | #ifdef HAVE_IPV6 | |
94f2b392 | 643 | static unsigned int |
718e3744 | 644 | bgp_ifindex_by_nexthop (struct in6_addr *addr) |
645 | { | |
52dc7ee6 | 646 | struct listnode *ifnode; |
647 | struct listnode *cnode; | |
718e3744 | 648 | struct interface *ifp; |
649 | struct connected *connected; | |
650 | struct prefix_ipv6 p; | |
651 | ||
652 | p.family = AF_INET6; | |
653 | p.prefix = *addr; | |
654 | p.prefixlen = IPV6_MAX_BITLEN; | |
655 | ||
1eb8ef25 | 656 | for (ALL_LIST_ELEMENTS_RO (iflist, ifnode, ifp)) |
718e3744 | 657 | { |
1eb8ef25 | 658 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, connected)) |
718e3744 | 659 | { |
660 | struct prefix *cp; | |
661 | ||
718e3744 | 662 | cp = connected->address; |
663 | ||
664 | if (cp->family == AF_INET6) | |
665 | { | |
666 | if (prefix_match (cp, (struct prefix *)&p)) | |
667 | return ifp->ifindex; | |
668 | } | |
669 | } | |
670 | } | |
671 | return 0; | |
672 | } | |
673 | #endif /* HAVE_IPV6 */ | |
674 | ||
675 | void | |
676 | bgp_zebra_announce (struct prefix *p, struct bgp_info *info, struct bgp *bgp) | |
677 | { | |
678 | int flags; | |
679 | u_char distance; | |
680 | struct peer *peer; | |
681 | ||
682 | if (zclient->sock < 0) | |
683 | return; | |
684 | ||
685 | if (! zclient->redist[ZEBRA_ROUTE_BGP]) | |
686 | return; | |
687 | ||
688 | flags = 0; | |
689 | peer = info->peer; | |
690 | ||
691 | if (peer_sort (peer) == BGP_PEER_IBGP || peer_sort (peer) == BGP_PEER_CONFED) | |
692 | { | |
693 | SET_FLAG (flags, ZEBRA_FLAG_IBGP); | |
694 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); | |
695 | } | |
696 | ||
697 | if ((peer_sort (peer) == BGP_PEER_EBGP && peer->ttl != 1) | |
6ffd2079 | 698 | || CHECK_FLAG (peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK)) |
718e3744 | 699 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); |
700 | ||
701 | if (p->family == AF_INET) | |
702 | { | |
703 | struct zapi_ipv4 api; | |
704 | struct in_addr *nexthop; | |
705 | ||
706 | api.flags = flags; | |
707 | nexthop = &info->attr->nexthop; | |
708 | ||
709 | api.type = ZEBRA_ROUTE_BGP; | |
710 | api.message = 0; | |
711 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); | |
712 | api.nexthop_num = 1; | |
713 | api.nexthop = &nexthop; | |
714 | api.ifindex_num = 0; | |
715 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); | |
716 | api.metric = info->attr->med; | |
717 | ||
718 | distance = bgp_distance_apply (p, info, bgp); | |
719 | ||
720 | if (distance) | |
721 | { | |
722 | SET_FLAG (api.message, ZAPI_MESSAGE_DISTANCE); | |
723 | api.distance = distance; | |
724 | } | |
a39275d7 AS |
725 | |
726 | if (BGP_DEBUG(zebra, ZEBRA)) | |
727 | { | |
728 | char buf[2][INET_ADDRSTRLEN]; | |
729 | zlog_debug("Zebra send: IPv4 route add %s/%d nexthop %s metric %u", | |
730 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], sizeof(buf[0])), | |
731 | p->prefixlen, | |
732 | inet_ntop(AF_INET, nexthop, buf[1], sizeof(buf[1])), | |
733 | api.metric); | |
734 | } | |
735 | ||
0a589359 | 736 | zapi_ipv4_route (ZEBRA_IPV4_ROUTE_ADD, zclient, |
737 | (struct prefix_ipv4 *) p, &api); | |
718e3744 | 738 | } |
739 | #ifdef HAVE_IPV6 | |
740 | /* We have to think about a IPv6 link-local address curse. */ | |
741 | if (p->family == AF_INET6) | |
742 | { | |
743 | unsigned int ifindex; | |
744 | struct in6_addr *nexthop; | |
745 | struct zapi_ipv6 api; | |
746 | ||
747 | ifindex = 0; | |
748 | nexthop = NULL; | |
fb982c25 PJ |
749 | |
750 | assert (info->attr->extra); | |
751 | ||
718e3744 | 752 | /* Only global address nexthop exists. */ |
fb982c25 PJ |
753 | if (info->attr->extra->mp_nexthop_len == 16) |
754 | nexthop = &info->attr->extra->mp_nexthop_global; | |
718e3744 | 755 | |
756 | /* If both global and link-local address present. */ | |
fb982c25 | 757 | if (info->attr->extra->mp_nexthop_len == 32) |
718e3744 | 758 | { |
759 | /* Workaround for Cisco's nexthop bug. */ | |
fb982c25 | 760 | if (IN6_IS_ADDR_UNSPECIFIED (&info->attr->extra->mp_nexthop_global) |
718e3744 | 761 | && peer->su_remote->sa.sa_family == AF_INET6) |
762 | nexthop = &peer->su_remote->sin6.sin6_addr; | |
763 | else | |
fb982c25 | 764 | nexthop = &info->attr->extra->mp_nexthop_local; |
718e3744 | 765 | |
766 | if (info->peer->nexthop.ifp) | |
767 | ifindex = info->peer->nexthop.ifp->ifindex; | |
768 | } | |
769 | ||
770 | if (nexthop == NULL) | |
771 | return; | |
772 | ||
773 | if (IN6_IS_ADDR_LINKLOCAL (nexthop) && ! ifindex) | |
774 | { | |
775 | if (info->peer->ifname) | |
776 | ifindex = if_nametoindex (info->peer->ifname); | |
777 | else if (info->peer->nexthop.ifp) | |
778 | ifindex = info->peer->nexthop.ifp->ifindex; | |
779 | } | |
780 | ||
781 | /* Make Zebra API structure. */ | |
782 | api.flags = flags; | |
783 | api.type = ZEBRA_ROUTE_BGP; | |
784 | api.message = 0; | |
785 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); | |
786 | api.nexthop_num = 1; | |
787 | api.nexthop = &nexthop; | |
788 | SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX); | |
789 | api.ifindex_num = 1; | |
790 | api.ifindex = &ifindex; | |
791 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); | |
792 | api.metric = info->attr->med; | |
793 | ||
a39275d7 AS |
794 | if (BGP_DEBUG(zebra, ZEBRA)) |
795 | { | |
796 | char buf[2][INET6_ADDRSTRLEN]; | |
797 | zlog_debug("Zebra send: IPv6 route add %s/%d nexthop %s metric %u", | |
798 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], sizeof(buf[0])), | |
799 | p->prefixlen, | |
800 | inet_ntop(AF_INET6, nexthop, buf[1], sizeof(buf[1])), | |
801 | api.metric); | |
802 | } | |
803 | ||
0a589359 | 804 | zapi_ipv6_route (ZEBRA_IPV6_ROUTE_ADD, zclient, |
805 | (struct prefix_ipv6 *) p, &api); | |
718e3744 | 806 | } |
807 | #endif /* HAVE_IPV6 */ | |
808 | } | |
809 | ||
810 | void | |
811 | bgp_zebra_withdraw (struct prefix *p, struct bgp_info *info) | |
812 | { | |
813 | int flags; | |
814 | struct peer *peer; | |
815 | ||
816 | if (zclient->sock < 0) | |
817 | return; | |
818 | ||
819 | if (! zclient->redist[ZEBRA_ROUTE_BGP]) | |
820 | return; | |
821 | ||
822 | peer = info->peer; | |
823 | flags = 0; | |
824 | ||
825 | if (peer_sort (peer) == BGP_PEER_IBGP) | |
826 | { | |
827 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); | |
828 | SET_FLAG (flags, ZEBRA_FLAG_IBGP); | |
829 | } | |
830 | ||
831 | if ((peer_sort (peer) == BGP_PEER_EBGP && peer->ttl != 1) | |
6ffd2079 | 832 | || CHECK_FLAG (peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK)) |
718e3744 | 833 | SET_FLAG (flags, ZEBRA_FLAG_INTERNAL); |
834 | ||
835 | if (p->family == AF_INET) | |
836 | { | |
837 | struct zapi_ipv4 api; | |
838 | struct in_addr *nexthop; | |
839 | ||
840 | api.flags = flags; | |
841 | nexthop = &info->attr->nexthop; | |
842 | ||
843 | api.type = ZEBRA_ROUTE_BGP; | |
844 | api.message = 0; | |
845 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); | |
846 | api.nexthop_num = 1; | |
847 | api.nexthop = &nexthop; | |
848 | api.ifindex_num = 0; | |
849 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); | |
850 | api.metric = info->attr->med; | |
851 | ||
a39275d7 AS |
852 | if (BGP_DEBUG(zebra, ZEBRA)) |
853 | { | |
854 | char buf[2][INET_ADDRSTRLEN]; | |
855 | zlog_debug("Zebra send: IPv4 route delete %s/%d nexthop %s metric %u", | |
856 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], sizeof(buf[0])), | |
857 | p->prefixlen, | |
858 | inet_ntop(AF_INET, nexthop, buf[1], sizeof(buf[1])), | |
859 | api.metric); | |
860 | } | |
861 | ||
0a589359 | 862 | zapi_ipv4_route (ZEBRA_IPV4_ROUTE_DELETE, zclient, |
863 | (struct prefix_ipv4 *) p, &api); | |
718e3744 | 864 | } |
865 | #ifdef HAVE_IPV6 | |
866 | /* We have to think about a IPv6 link-local address curse. */ | |
867 | if (p->family == AF_INET6) | |
868 | { | |
869 | struct zapi_ipv6 api; | |
870 | unsigned int ifindex; | |
871 | struct in6_addr *nexthop; | |
fb982c25 PJ |
872 | |
873 | assert (info->attr->extra); | |
874 | ||
718e3744 | 875 | ifindex = 0; |
876 | nexthop = NULL; | |
877 | ||
878 | /* Only global address nexthop exists. */ | |
fb982c25 PJ |
879 | if (info->attr->extra->mp_nexthop_len == 16) |
880 | nexthop = &info->attr->extra->mp_nexthop_global; | |
718e3744 | 881 | |
882 | /* If both global and link-local address present. */ | |
fb982c25 | 883 | if (info->attr->extra->mp_nexthop_len == 32) |
718e3744 | 884 | { |
fb982c25 | 885 | nexthop = &info->attr->extra->mp_nexthop_local; |
718e3744 | 886 | if (info->peer->nexthop.ifp) |
887 | ifindex = info->peer->nexthop.ifp->ifindex; | |
888 | } | |
889 | ||
890 | if (nexthop == NULL) | |
891 | return; | |
892 | ||
893 | if (IN6_IS_ADDR_LINKLOCAL (nexthop) && ! ifindex) | |
894 | if (info->peer->ifname) | |
895 | ifindex = if_nametoindex (info->peer->ifname); | |
896 | ||
897 | api.flags = flags; | |
898 | api.type = ZEBRA_ROUTE_BGP; | |
899 | api.message = 0; | |
900 | SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP); | |
901 | api.nexthop_num = 1; | |
902 | api.nexthop = &nexthop; | |
903 | SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX); | |
904 | api.ifindex_num = 1; | |
905 | api.ifindex = &ifindex; | |
906 | SET_FLAG (api.message, ZAPI_MESSAGE_METRIC); | |
907 | api.metric = info->attr->med; | |
908 | ||
a39275d7 AS |
909 | if (BGP_DEBUG(zebra, ZEBRA)) |
910 | { | |
911 | char buf[2][INET6_ADDRSTRLEN]; | |
912 | zlog_debug("Zebra send: IPv6 route delete %s/%d nexthop %s metric %u", | |
913 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], sizeof(buf[0])), | |
914 | p->prefixlen, | |
915 | inet_ntop(AF_INET6, nexthop, buf[1], sizeof(buf[1])), | |
916 | api.metric); | |
917 | } | |
918 | ||
0a589359 | 919 | zapi_ipv6_route (ZEBRA_IPV6_ROUTE_DELETE, zclient, |
920 | (struct prefix_ipv6 *) p, &api); | |
718e3744 | 921 | } |
922 | #endif /* HAVE_IPV6 */ | |
923 | } | |
924 | \f | |
925 | /* Other routes redistribution into BGP. */ | |
926 | int | |
927 | bgp_redistribute_set (struct bgp *bgp, afi_t afi, int type) | |
928 | { | |
929 | /* Set flag to BGP instance. */ | |
930 | bgp->redist[afi][type] = 1; | |
931 | ||
932 | /* Return if already redistribute flag is set. */ | |
933 | if (zclient->redist[type]) | |
934 | return CMD_WARNING; | |
935 | ||
936 | zclient->redist[type] = 1; | |
937 | ||
938 | /* Return if zebra connection is not established. */ | |
939 | if (zclient->sock < 0) | |
940 | return CMD_WARNING; | |
a39275d7 AS |
941 | |
942 | if (BGP_DEBUG(zebra, ZEBRA)) | |
943 | zlog_debug("Zebra send: redistribute add %s", zebra_route_string(type)); | |
718e3744 | 944 | |
945 | /* Send distribute add message to zebra. */ | |
634f9ea2 | 946 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient, type); |
718e3744 | 947 | |
948 | return CMD_SUCCESS; | |
949 | } | |
950 | ||
951 | /* Redistribute with route-map specification. */ | |
952 | int | |
fd79ac91 | 953 | bgp_redistribute_rmap_set (struct bgp *bgp, afi_t afi, int type, |
954 | const char *name) | |
718e3744 | 955 | { |
956 | if (bgp->rmap[afi][type].name | |
957 | && (strcmp (bgp->rmap[afi][type].name, name) == 0)) | |
958 | return 0; | |
959 | ||
960 | if (bgp->rmap[afi][type].name) | |
961 | free (bgp->rmap[afi][type].name); | |
962 | bgp->rmap[afi][type].name = strdup (name); | |
963 | bgp->rmap[afi][type].map = route_map_lookup_by_name (name); | |
964 | ||
965 | return 1; | |
966 | } | |
967 | ||
968 | /* Redistribute with metric specification. */ | |
969 | int | |
970 | bgp_redistribute_metric_set (struct bgp *bgp, afi_t afi, int type, | |
971 | u_int32_t metric) | |
972 | { | |
973 | if (bgp->redist_metric_flag[afi][type] | |
974 | && bgp->redist_metric[afi][type] == metric) | |
975 | return 0; | |
976 | ||
977 | bgp->redist_metric_flag[afi][type] = 1; | |
978 | bgp->redist_metric[afi][type] = metric; | |
979 | ||
980 | return 1; | |
981 | } | |
982 | ||
983 | /* Unset redistribution. */ | |
984 | int | |
985 | bgp_redistribute_unset (struct bgp *bgp, afi_t afi, int type) | |
986 | { | |
987 | /* Unset flag from BGP instance. */ | |
988 | bgp->redist[afi][type] = 0; | |
989 | ||
990 | /* Unset route-map. */ | |
991 | if (bgp->rmap[afi][type].name) | |
992 | free (bgp->rmap[afi][type].name); | |
993 | bgp->rmap[afi][type].name = NULL; | |
994 | bgp->rmap[afi][type].map = NULL; | |
995 | ||
996 | /* Unset metric. */ | |
997 | bgp->redist_metric_flag[afi][type] = 0; | |
998 | bgp->redist_metric[afi][type] = 0; | |
999 | ||
1000 | /* Return if zebra connection is disabled. */ | |
1001 | if (! zclient->redist[type]) | |
1002 | return CMD_WARNING; | |
1003 | zclient->redist[type] = 0; | |
1004 | ||
1005 | if (bgp->redist[AFI_IP][type] == 0 | |
1006 | && bgp->redist[AFI_IP6][type] == 0 | |
1007 | && zclient->sock >= 0) | |
a39275d7 AS |
1008 | { |
1009 | /* Send distribute delete message to zebra. */ | |
1010 | if (BGP_DEBUG(zebra, ZEBRA)) | |
1011 | zlog_debug("Zebra send: redistribute delete %s", | |
1012 | zebra_route_string(type)); | |
1013 | zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient, type); | |
1014 | } | |
718e3744 | 1015 | |
1016 | /* Withdraw redistributed routes from current BGP's routing table. */ | |
1017 | bgp_redistribute_withdraw (bgp, afi, type); | |
1018 | ||
1019 | return CMD_SUCCESS; | |
1020 | } | |
1021 | ||
1022 | /* Unset redistribution route-map configuration. */ | |
1023 | int | |
1024 | bgp_redistribute_routemap_unset (struct bgp *bgp, afi_t afi, int type) | |
1025 | { | |
1026 | if (! bgp->rmap[afi][type].name) | |
1027 | return 0; | |
1028 | ||
1029 | /* Unset route-map. */ | |
1030 | free (bgp->rmap[afi][type].name); | |
1031 | bgp->rmap[afi][type].name = NULL; | |
1032 | bgp->rmap[afi][type].map = NULL; | |
1033 | ||
1034 | return 1; | |
1035 | } | |
1036 | ||
1037 | /* Unset redistribution metric configuration. */ | |
1038 | int | |
1039 | bgp_redistribute_metric_unset (struct bgp *bgp, afi_t afi, int type) | |
1040 | { | |
1041 | if (! bgp->redist_metric_flag[afi][type]) | |
1042 | return 0; | |
1043 | ||
1044 | /* Unset metric. */ | |
1045 | bgp->redist_metric_flag[afi][type] = 0; | |
1046 | bgp->redist_metric[afi][type] = 0; | |
1047 | ||
1048 | return 1; | |
1049 | } | |
1050 | \f | |
1051 | void | |
94f2b392 | 1052 | bgp_zclient_reset (void) |
718e3744 | 1053 | { |
1054 | zclient_reset (zclient); | |
1055 | } | |
1056 | ||
1057 | void | |
94f2b392 | 1058 | bgp_zebra_init (void) |
718e3744 | 1059 | { |
1060 | /* Set default values. */ | |
1061 | zclient = zclient_new (); | |
1062 | zclient_init (zclient, ZEBRA_ROUTE_BGP); | |
18a6dce6 | 1063 | zclient->router_id_update = bgp_router_id_update; |
718e3744 | 1064 | zclient->interface_add = bgp_interface_add; |
1065 | zclient->interface_delete = bgp_interface_delete; | |
1066 | zclient->interface_address_add = bgp_interface_address_add; | |
1067 | zclient->interface_address_delete = bgp_interface_address_delete; | |
1068 | zclient->ipv4_route_add = zebra_read_ipv4; | |
1069 | zclient->ipv4_route_delete = zebra_read_ipv4; | |
1070 | zclient->interface_up = bgp_interface_up; | |
1071 | zclient->interface_down = bgp_interface_down; | |
1072 | #ifdef HAVE_IPV6 | |
1073 | zclient->ipv6_route_add = zebra_read_ipv6; | |
1074 | zclient->ipv6_route_delete = zebra_read_ipv6; | |
1075 | #endif /* HAVE_IPV6 */ | |
1076 | ||
1077 | /* Interface related init. */ | |
1078 | if_init (); | |
1079 | } |