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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "table.h" | |
26 | #include "memory.h" | |
27 | #include "str.h" | |
28 | #include "command.h" | |
29 | #include "if.h" | |
30 | #include "log.h" | |
31 | #include "sockunion.h" | |
32 | ||
33 | #include "zebra/rib.h" | |
34 | #include "zebra/rt.h" | |
35 | #include "zebra/zserv.h" | |
36 | #include "zebra/redistribute.h" | |
37 | #include "zebra/debug.h" | |
38 | ||
39 | /* Default rtm_table for all clients */ | |
b21b19c5 | 40 | extern struct zebra_t zebrad; |
718e3744 | 41 | |
42 | /* Each route type's string and default distance value. */ | |
43 | struct | |
44 | { | |
45 | int key; | |
46 | int distance; | |
47 | } route_info[] = | |
48 | { | |
49 | {ZEBRA_ROUTE_SYSTEM, 0}, | |
50 | {ZEBRA_ROUTE_KERNEL, 0}, | |
51 | {ZEBRA_ROUTE_CONNECT, 0}, | |
52 | {ZEBRA_ROUTE_STATIC, 1}, | |
53 | {ZEBRA_ROUTE_RIP, 120}, | |
54 | {ZEBRA_ROUTE_RIPNG, 120}, | |
55 | {ZEBRA_ROUTE_OSPF, 110}, | |
56 | {ZEBRA_ROUTE_OSPF6, 110}, | |
9e867fe6 | 57 | {ZEBRA_ROUTE_ISIS, 115}, |
718e3744 | 58 | {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */} |
59 | }; | |
60 | \f | |
61 | /* Vector for routing table. */ | |
62 | vector vrf_vector; | |
63 | ||
64 | /* Allocate new VRF. */ | |
65 | struct vrf * | |
66 | vrf_alloc (char *name) | |
67 | { | |
68 | struct vrf *vrf; | |
69 | ||
70 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); | |
71 | ||
72 | /* Put name. */ | |
73 | if (name) | |
74 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); | |
75 | ||
76 | /* Allocate routing table and static table. */ | |
77 | vrf->table[AFI_IP][SAFI_UNICAST] = route_table_init (); | |
78 | vrf->table[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
79 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); | |
80 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
81 | ||
82 | return vrf; | |
83 | } | |
84 | ||
85 | /* Free VRF. */ | |
86 | void | |
87 | vrf_free (struct vrf *vrf) | |
88 | { | |
89 | if (vrf->name) | |
90 | XFREE (MTYPE_VRF_NAME, vrf->name); | |
91 | XFREE (MTYPE_VRF, vrf); | |
92 | } | |
93 | ||
94 | /* Lookup VRF by identifier. */ | |
95 | struct vrf * | |
96 | vrf_lookup (u_int32_t id) | |
97 | { | |
98 | return vector_lookup (vrf_vector, id); | |
99 | } | |
100 | ||
101 | /* Lookup VRF by name. */ | |
102 | struct vrf * | |
103 | vrf_lookup_by_name (char *name) | |
104 | { | |
105 | int i; | |
106 | struct vrf *vrf; | |
107 | ||
108 | for (i = 0; i < vector_max (vrf_vector); i++) | |
109 | if ((vrf = vector_slot (vrf_vector, i)) != NULL) | |
110 | if (vrf->name && name && strcmp (vrf->name, name) == 0) | |
111 | return vrf; | |
112 | return NULL; | |
113 | } | |
114 | ||
115 | /* Initialize VRF. */ | |
116 | void | |
117 | vrf_init () | |
118 | { | |
119 | struct vrf *default_table; | |
120 | ||
121 | /* Allocate VRF vector. */ | |
122 | vrf_vector = vector_init (1); | |
123 | ||
124 | /* Allocate default main table. */ | |
125 | default_table = vrf_alloc ("Default-IP-Routing-Table"); | |
126 | ||
127 | /* Default table index must be 0. */ | |
128 | vector_set_index (vrf_vector, 0, default_table); | |
129 | } | |
130 | ||
131 | /* Lookup route table. */ | |
132 | struct route_table * | |
133 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) | |
134 | { | |
135 | struct vrf *vrf; | |
136 | ||
137 | vrf = vrf_lookup (id); | |
138 | if (! vrf) | |
139 | return NULL; | |
140 | ||
141 | return vrf->table[afi][safi]; | |
142 | } | |
143 | ||
144 | /* Lookup static route table. */ | |
145 | struct route_table * | |
146 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) | |
147 | { | |
148 | struct vrf *vrf; | |
149 | ||
150 | vrf = vrf_lookup (id); | |
151 | if (! vrf) | |
152 | return NULL; | |
153 | ||
154 | return vrf->stable[afi][safi]; | |
155 | } | |
156 | \f | |
157 | /* Add nexthop to the end of the list. */ | |
158 | void | |
159 | nexthop_add (struct rib *rib, struct nexthop *nexthop) | |
160 | { | |
161 | struct nexthop *last; | |
162 | ||
163 | for (last = rib->nexthop; last && last->next; last = last->next) | |
164 | ; | |
165 | if (last) | |
166 | last->next = nexthop; | |
167 | else | |
168 | rib->nexthop = nexthop; | |
169 | nexthop->prev = last; | |
170 | ||
171 | rib->nexthop_num++; | |
172 | } | |
173 | ||
174 | /* Delete specified nexthop from the list. */ | |
175 | void | |
176 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) | |
177 | { | |
178 | if (nexthop->next) | |
179 | nexthop->next->prev = nexthop->prev; | |
180 | if (nexthop->prev) | |
181 | nexthop->prev->next = nexthop->next; | |
182 | else | |
183 | rib->nexthop = nexthop->next; | |
184 | rib->nexthop_num--; | |
185 | } | |
186 | ||
187 | /* Free nexthop. */ | |
188 | void | |
189 | nexthop_free (struct nexthop *nexthop) | |
190 | { | |
a4b70768 | 191 | if (nexthop->ifname) |
192 | XFREE (0, nexthop->ifname); | |
718e3744 | 193 | XFREE (MTYPE_NEXTHOP, nexthop); |
194 | } | |
195 | ||
196 | struct nexthop * | |
197 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
198 | { | |
199 | struct nexthop *nexthop; | |
200 | ||
201 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
202 | memset (nexthop, 0, sizeof (struct nexthop)); | |
203 | nexthop->type = NEXTHOP_TYPE_IFINDEX; | |
204 | nexthop->ifindex = ifindex; | |
205 | ||
206 | nexthop_add (rib, nexthop); | |
207 | ||
208 | return nexthop; | |
209 | } | |
210 | ||
211 | struct nexthop * | |
212 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
213 | { | |
214 | struct nexthop *nexthop; | |
215 | ||
216 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
217 | memset (nexthop, 0, sizeof (struct nexthop)); | |
218 | nexthop->type = NEXTHOP_TYPE_IFNAME; | |
a4b70768 | 219 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 220 | |
221 | nexthop_add (rib, nexthop); | |
222 | ||
223 | return nexthop; | |
224 | } | |
225 | ||
226 | struct nexthop * | |
227 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4) | |
228 | { | |
229 | struct nexthop *nexthop; | |
230 | ||
231 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
232 | memset (nexthop, 0, sizeof (struct nexthop)); | |
233 | nexthop->type = NEXTHOP_TYPE_IPV4; | |
234 | nexthop->gate.ipv4 = *ipv4; | |
235 | ||
236 | nexthop_add (rib, nexthop); | |
237 | ||
238 | return nexthop; | |
239 | } | |
240 | ||
241 | struct nexthop * | |
242 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, | |
243 | unsigned int ifindex) | |
244 | { | |
245 | struct nexthop *nexthop; | |
246 | ||
247 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
248 | memset (nexthop, 0, sizeof (struct nexthop)); | |
249 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
250 | nexthop->gate.ipv4 = *ipv4; | |
251 | nexthop->ifindex = ifindex; | |
252 | ||
253 | nexthop_add (rib, nexthop); | |
254 | ||
255 | return nexthop; | |
256 | } | |
257 | ||
258 | #ifdef HAVE_IPV6 | |
259 | struct nexthop * | |
260 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
261 | { | |
262 | struct nexthop *nexthop; | |
263 | ||
264 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
265 | memset (nexthop, 0, sizeof (struct nexthop)); | |
266 | nexthop->type = NEXTHOP_TYPE_IPV6; | |
267 | nexthop->gate.ipv6 = *ipv6; | |
268 | ||
269 | nexthop_add (rib, nexthop); | |
270 | ||
271 | return nexthop; | |
272 | } | |
273 | ||
274 | struct nexthop * | |
275 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, | |
276 | char *ifname) | |
277 | { | |
278 | struct nexthop *nexthop; | |
279 | ||
280 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
281 | memset (nexthop, 0, sizeof (struct nexthop)); | |
282 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; | |
283 | nexthop->gate.ipv6 = *ipv6; | |
284 | nexthop->ifname = XSTRDUP (0, ifname); | |
285 | ||
286 | nexthop_add (rib, nexthop); | |
287 | ||
288 | return nexthop; | |
289 | } | |
290 | ||
291 | struct nexthop * | |
292 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, | |
293 | unsigned int ifindex) | |
294 | { | |
295 | struct nexthop *nexthop; | |
296 | ||
297 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
298 | memset (nexthop, 0, sizeof (struct nexthop)); | |
299 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
300 | nexthop->gate.ipv6 = *ipv6; | |
301 | nexthop->ifindex = ifindex; | |
302 | ||
303 | nexthop_add (rib, nexthop); | |
304 | ||
305 | return nexthop; | |
306 | } | |
307 | #endif /* HAVE_IPV6 */ | |
308 | ||
595db7f1 | 309 | struct nexthop * |
310 | nexthop_blackhole_add (struct rib *rib) | |
311 | { | |
312 | struct nexthop *nexthop; | |
313 | ||
314 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
315 | memset (nexthop, 0, sizeof (struct nexthop)); | |
316 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; | |
317 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
318 | ||
319 | nexthop_add (rib, nexthop); | |
320 | ||
321 | return nexthop; | |
322 | } | |
323 | ||
718e3744 | 324 | /* If force flag is not set, do not modify falgs at all for uninstall |
325 | the route from FIB. */ | |
326 | int | |
327 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, | |
328 | struct route_node *top) | |
329 | { | |
330 | struct prefix_ipv4 p; | |
331 | struct route_table *table; | |
332 | struct route_node *rn; | |
333 | struct rib *match; | |
334 | struct nexthop *newhop; | |
335 | ||
336 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
337 | nexthop->ifindex = 0; | |
338 | ||
339 | if (set) | |
340 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
341 | ||
342 | /* Make lookup prefix. */ | |
343 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
344 | p.family = AF_INET; | |
345 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
346 | p.prefix = nexthop->gate.ipv4; | |
347 | ||
348 | /* Lookup table. */ | |
349 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
350 | if (! table) | |
351 | return 0; | |
352 | ||
353 | rn = route_node_match (table, (struct prefix *) &p); | |
354 | while (rn) | |
355 | { | |
356 | route_unlock_node (rn); | |
357 | ||
358 | /* If lookup self prefix return immidiately. */ | |
359 | if (rn == top) | |
360 | return 0; | |
361 | ||
362 | /* Pick up selected route. */ | |
363 | for (match = rn->info; match; match = match->next) | |
364 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
365 | break; | |
366 | ||
367 | /* If there is no selected route or matched route is EGP, go up | |
368 | tree. */ | |
369 | if (! match | |
370 | || match->type == ZEBRA_ROUTE_BGP) | |
371 | { | |
372 | do { | |
373 | rn = rn->parent; | |
374 | } while (rn && rn->info == NULL); | |
375 | if (rn) | |
376 | route_lock_node (rn); | |
377 | } | |
378 | else | |
379 | { | |
380 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
381 | { | |
382 | /* Directly point connected route. */ | |
383 | newhop = match->nexthop; | |
384 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
385 | nexthop->ifindex = newhop->ifindex; | |
386 | ||
387 | return 1; | |
388 | } | |
389 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
390 | { | |
391 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
392 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
393 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
394 | { | |
395 | if (set) | |
396 | { | |
397 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
398 | nexthop->rtype = newhop->type; | |
399 | if (newhop->type == NEXTHOP_TYPE_IPV4 || | |
400 | newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
401 | nexthop->rgate.ipv4 = newhop->gate.ipv4; | |
402 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
403 | || newhop->type == NEXTHOP_TYPE_IFNAME | |
404 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
405 | nexthop->rifindex = newhop->ifindex; | |
406 | } | |
407 | return 1; | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | else | |
412 | { | |
413 | return 0; | |
414 | } | |
415 | } | |
416 | } | |
417 | return 0; | |
418 | } | |
419 | ||
420 | #ifdef HAVE_IPV6 | |
421 | /* If force flag is not set, do not modify falgs at all for uninstall | |
422 | the route from FIB. */ | |
423 | int | |
424 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, | |
425 | struct route_node *top) | |
426 | { | |
427 | struct prefix_ipv6 p; | |
428 | struct route_table *table; | |
429 | struct route_node *rn; | |
430 | struct rib *match; | |
431 | struct nexthop *newhop; | |
432 | ||
433 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
434 | nexthop->ifindex = 0; | |
435 | ||
436 | if (set) | |
437 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
438 | ||
439 | /* Make lookup prefix. */ | |
440 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
441 | p.family = AF_INET6; | |
442 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
443 | p.prefix = nexthop->gate.ipv6; | |
444 | ||
445 | /* Lookup table. */ | |
446 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
447 | if (! table) | |
448 | return 0; | |
449 | ||
450 | rn = route_node_match (table, (struct prefix *) &p); | |
451 | while (rn) | |
452 | { | |
453 | route_unlock_node (rn); | |
454 | ||
455 | /* If lookup self prefix return immidiately. */ | |
456 | if (rn == top) | |
457 | return 0; | |
458 | ||
459 | /* Pick up selected route. */ | |
460 | for (match = rn->info; match; match = match->next) | |
461 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
462 | break; | |
463 | ||
464 | /* If there is no selected route or matched route is EGP, go up | |
465 | tree. */ | |
466 | if (! match | |
467 | || match->type == ZEBRA_ROUTE_BGP) | |
468 | { | |
469 | do { | |
470 | rn = rn->parent; | |
471 | } while (rn && rn->info == NULL); | |
472 | if (rn) | |
473 | route_lock_node (rn); | |
474 | } | |
475 | else | |
476 | { | |
477 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
478 | { | |
479 | /* Directly point connected route. */ | |
480 | newhop = match->nexthop; | |
481 | ||
482 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
483 | nexthop->ifindex = newhop->ifindex; | |
484 | ||
485 | return 1; | |
486 | } | |
487 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
488 | { | |
489 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
490 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
491 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
492 | { | |
493 | if (set) | |
494 | { | |
495 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
496 | nexthop->rtype = newhop->type; | |
497 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
498 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
499 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
500 | nexthop->rgate.ipv6 = newhop->gate.ipv6; | |
501 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
502 | || newhop->type == NEXTHOP_TYPE_IFNAME | |
503 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
504 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
505 | nexthop->rifindex = newhop->ifindex; | |
506 | } | |
507 | return 1; | |
508 | } | |
509 | return 0; | |
510 | } | |
511 | else | |
512 | { | |
513 | return 0; | |
514 | } | |
515 | } | |
516 | } | |
517 | return 0; | |
518 | } | |
519 | #endif /* HAVE_IPV6 */ | |
520 | ||
521 | struct rib * | |
522 | rib_match_ipv4 (struct in_addr addr) | |
523 | { | |
524 | struct prefix_ipv4 p; | |
525 | struct route_table *table; | |
526 | struct route_node *rn; | |
527 | struct rib *match; | |
528 | struct nexthop *newhop; | |
529 | ||
530 | /* Lookup table. */ | |
531 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
532 | if (! table) | |
533 | return 0; | |
534 | ||
535 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
536 | p.family = AF_INET; | |
537 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
538 | p.prefix = addr; | |
539 | ||
540 | rn = route_node_match (table, (struct prefix *) &p); | |
541 | ||
542 | while (rn) | |
543 | { | |
544 | route_unlock_node (rn); | |
545 | ||
546 | /* Pick up selected route. */ | |
547 | for (match = rn->info; match; match = match->next) | |
548 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
549 | break; | |
550 | ||
551 | /* If there is no selected route or matched route is EGP, go up | |
552 | tree. */ | |
553 | if (! match | |
554 | || match->type == ZEBRA_ROUTE_BGP) | |
555 | { | |
556 | do { | |
557 | rn = rn->parent; | |
558 | } while (rn && rn->info == NULL); | |
559 | if (rn) | |
560 | route_lock_node (rn); | |
561 | } | |
562 | else | |
563 | { | |
564 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
565 | /* Directly point connected route. */ | |
566 | return match; | |
567 | else | |
568 | { | |
569 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
570 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
571 | return match; | |
572 | return NULL; | |
573 | } | |
574 | } | |
575 | } | |
576 | return NULL; | |
577 | } | |
578 | ||
579 | struct rib * | |
580 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
581 | { | |
582 | struct route_table *table; | |
583 | struct route_node *rn; | |
584 | struct rib *match; | |
585 | struct nexthop *nexthop; | |
586 | ||
587 | /* Lookup table. */ | |
588 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
589 | if (! table) | |
590 | return 0; | |
591 | ||
592 | rn = route_node_lookup (table, (struct prefix *) p); | |
593 | ||
594 | /* No route for this prefix. */ | |
595 | if (! rn) | |
596 | return NULL; | |
597 | ||
598 | /* Unlock node. */ | |
599 | route_unlock_node (rn); | |
600 | ||
601 | /* Pick up selected route. */ | |
602 | for (match = rn->info; match; match = match->next) | |
603 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
604 | break; | |
605 | ||
606 | if (! match || match->type == ZEBRA_ROUTE_BGP) | |
607 | return NULL; | |
608 | ||
609 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
610 | return match; | |
611 | ||
612 | for (nexthop = match->nexthop; nexthop; nexthop = nexthop->next) | |
613 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
614 | return match; | |
615 | ||
616 | return NULL; | |
617 | } | |
618 | ||
619 | #ifdef HAVE_IPV6 | |
620 | struct rib * | |
621 | rib_match_ipv6 (struct in6_addr *addr) | |
622 | { | |
623 | struct prefix_ipv6 p; | |
624 | struct route_table *table; | |
625 | struct route_node *rn; | |
626 | struct rib *match; | |
627 | struct nexthop *newhop; | |
628 | ||
629 | /* Lookup table. */ | |
630 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
631 | if (! table) | |
632 | return 0; | |
633 | ||
634 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
635 | p.family = AF_INET6; | |
636 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
637 | IPV6_ADDR_COPY (&p.prefix, addr); | |
638 | ||
639 | rn = route_node_match (table, (struct prefix *) &p); | |
640 | ||
641 | while (rn) | |
642 | { | |
643 | route_unlock_node (rn); | |
644 | ||
645 | /* Pick up selected route. */ | |
646 | for (match = rn->info; match; match = match->next) | |
647 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
648 | break; | |
649 | ||
650 | /* If there is no selected route or matched route is EGP, go up | |
651 | tree. */ | |
652 | if (! match | |
653 | || match->type == ZEBRA_ROUTE_BGP) | |
654 | { | |
655 | do { | |
656 | rn = rn->parent; | |
657 | } while (rn && rn->info == NULL); | |
658 | if (rn) | |
659 | route_lock_node (rn); | |
660 | } | |
661 | else | |
662 | { | |
663 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
664 | /* Directly point connected route. */ | |
665 | return match; | |
666 | else | |
667 | { | |
668 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
669 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
670 | return match; | |
671 | return NULL; | |
672 | } | |
673 | } | |
674 | } | |
675 | return NULL; | |
676 | } | |
677 | #endif /* HAVE_IPV6 */ | |
678 | ||
679 | int | |
680 | nexthop_active_check (struct route_node *rn, struct rib *rib, | |
681 | struct nexthop *nexthop, int set) | |
682 | { | |
683 | struct interface *ifp; | |
684 | ||
685 | switch (nexthop->type) | |
686 | { | |
687 | case NEXTHOP_TYPE_IFINDEX: | |
688 | ifp = if_lookup_by_index (nexthop->ifindex); | |
689 | if (ifp && if_is_up (ifp)) | |
690 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
691 | else | |
692 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
693 | break; | |
694 | case NEXTHOP_TYPE_IFNAME: | |
695 | case NEXTHOP_TYPE_IPV6_IFNAME: | |
696 | ifp = if_lookup_by_name (nexthop->ifname); | |
697 | if (ifp && if_is_up (ifp)) | |
698 | { | |
699 | if (set) | |
700 | nexthop->ifindex = ifp->ifindex; | |
701 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
702 | } | |
703 | else | |
704 | { | |
705 | if (set) | |
706 | nexthop->ifindex = 0; | |
707 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
708 | } | |
709 | break; | |
710 | case NEXTHOP_TYPE_IPV4: | |
711 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
712 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) | |
713 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
714 | else | |
715 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
716 | break; | |
717 | #ifdef HAVE_IPV6 | |
718 | case NEXTHOP_TYPE_IPV6: | |
719 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
720 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
721 | else | |
722 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
723 | break; | |
724 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
725 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) | |
726 | { | |
727 | ifp = if_lookup_by_index (nexthop->ifindex); | |
728 | if (ifp && if_is_up (ifp)) | |
729 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
730 | else | |
731 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
732 | } | |
733 | else | |
734 | { | |
735 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
736 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
737 | else | |
738 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
739 | } | |
740 | break; | |
741 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 742 | case NEXTHOP_TYPE_BLACKHOLE: |
743 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
744 | break; | |
718e3744 | 745 | default: |
746 | break; | |
747 | } | |
748 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
749 | } | |
750 | ||
751 | int | |
752 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) | |
753 | { | |
754 | struct nexthop *nexthop; | |
755 | int active; | |
756 | ||
757 | rib->nexthop_active_num = 0; | |
758 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
759 | ||
760 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
761 | { | |
762 | active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 763 | |
764 | nexthop_active_check (rn, rib, nexthop, set); | |
765 | if ((MULTIPATH_NUM == 0 || rib->nexthop_active_num < MULTIPATH_NUM) | |
766 | && active != CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
767 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
768 | ||
769 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
770 | rib->nexthop_active_num++; | |
718e3744 | 771 | } |
772 | return rib->nexthop_active_num; | |
773 | } | |
6baeb988 | 774 | |
718e3744 | 775 | \f |
776 | #define RIB_SYSTEM_ROUTE(R) \ | |
777 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
778 | ||
779 | void | |
780 | newrib_free (struct rib *rib) | |
781 | { | |
782 | struct nexthop *nexthop; | |
783 | struct nexthop *next; | |
784 | ||
785 | for (nexthop = rib->nexthop; nexthop; nexthop = next) | |
786 | { | |
787 | next = nexthop->next; | |
788 | nexthop_free (nexthop); | |
789 | } | |
790 | XFREE (MTYPE_RIB, rib); | |
791 | } | |
792 | ||
793 | void | |
794 | rib_install_kernel (struct route_node *rn, struct rib *rib) | |
795 | { | |
796 | int ret = 0; | |
797 | struct nexthop *nexthop; | |
798 | ||
799 | switch (PREFIX_FAMILY (&rn->p)) | |
800 | { | |
801 | case AF_INET: | |
802 | ret = kernel_add_ipv4 (&rn->p, rib); | |
803 | break; | |
804 | #ifdef HAVE_IPV6 | |
805 | case AF_INET6: | |
806 | ret = kernel_add_ipv6 (&rn->p, rib); | |
807 | break; | |
808 | #endif /* HAVE_IPV6 */ | |
809 | } | |
810 | ||
811 | if (ret < 0) | |
812 | { | |
813 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
814 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
815 | } | |
816 | } | |
817 | ||
818 | /* Uninstall the route from kernel. */ | |
819 | int | |
820 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) | |
821 | { | |
822 | int ret = 0; | |
823 | struct nexthop *nexthop; | |
824 | ||
825 | switch (PREFIX_FAMILY (&rn->p)) | |
826 | { | |
827 | case AF_INET: | |
828 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
829 | break; | |
830 | #ifdef HAVE_IPV6 | |
831 | case AF_INET6: | |
832 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
833 | break; | |
834 | #endif /* HAVE_IPV6 */ | |
835 | } | |
836 | ||
837 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
838 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
839 | ||
840 | return ret; | |
841 | } | |
842 | ||
843 | /* Uninstall the route from kernel. */ | |
844 | void | |
845 | rib_uninstall (struct route_node *rn, struct rib *rib) | |
846 | { | |
847 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
848 | { | |
849 | redistribute_delete (&rn->p, rib); | |
850 | if (! RIB_SYSTEM_ROUTE (rib)) | |
851 | rib_uninstall_kernel (rn, rib); | |
852 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
853 | } | |
854 | } | |
855 | ||
856 | /* Core function for processing routing information base. */ | |
857 | void | |
858 | rib_process (struct route_node *rn, struct rib *del) | |
859 | { | |
860 | struct rib *rib; | |
861 | struct rib *next; | |
862 | struct rib *fib = NULL; | |
863 | struct rib *select = NULL; | |
d753e9ee | 864 | int installed = 0; |
865 | struct nexthop *nexthop = NULL; | |
718e3744 | 866 | |
867 | for (rib = rn->info; rib; rib = next) | |
868 | { | |
869 | next = rib->next; | |
d753e9ee | 870 | |
718e3744 | 871 | /* Currently installed rib. */ |
872 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
7021c425 | 873 | fib = rib; |
718e3744 | 874 | |
875 | /* Skip unreachable nexthop. */ | |
876 | if (! nexthop_active_update (rn, rib, 0)) | |
7021c425 | 877 | continue; |
718e3744 | 878 | |
879 | /* Infinit distance. */ | |
880 | if (rib->distance == DISTANCE_INFINITY) | |
7021c425 | 881 | continue; |
718e3744 | 882 | |
883 | /* Newly selected rib. */ | |
884 | if (! select || rib->distance < select->distance | |
7021c425 | 885 | || rib->type == ZEBRA_ROUTE_CONNECT) |
886 | select = rib; | |
718e3744 | 887 | } |
888 | ||
889 | /* Deleted route check. */ | |
890 | if (del && CHECK_FLAG (del->flags, ZEBRA_FLAG_SELECTED)) | |
891 | fib = del; | |
892 | ||
893 | /* Same route is selected. */ | |
894 | if (select && select == fib) | |
895 | { | |
896 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) | |
897 | { | |
898 | redistribute_delete (&rn->p, select); | |
899 | if (! RIB_SYSTEM_ROUTE (select)) | |
900 | rib_uninstall_kernel (rn, select); | |
901 | ||
902 | /* Set real nexthop. */ | |
903 | nexthop_active_update (rn, select, 1); | |
904 | ||
905 | if (! RIB_SYSTEM_ROUTE (select)) | |
906 | rib_install_kernel (rn, select); | |
907 | redistribute_add (&rn->p, select); | |
908 | } | |
d753e9ee | 909 | else if (! RIB_SYSTEM_ROUTE (select)) |
910 | { | |
911 | /* Housekeeping code to deal with | |
912 | race conditions in kernel with linux | |
913 | netlink reporting interface up before IPv4 or IPv6 protocol | |
914 | is ready to add routes. | |
915 | This makes sure the routes are IN the kernel. | |
916 | */ | |
917 | ||
918 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) | |
919 | { | |
920 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
921 | installed = 1; | |
922 | } | |
923 | if (! installed) rib_install_kernel (rn, select); | |
924 | } | |
718e3744 | 925 | return; |
926 | } | |
927 | ||
928 | /* Uninstall old rib from forwarding table. */ | |
929 | if (fib) | |
930 | { | |
931 | redistribute_delete (&rn->p, fib); | |
932 | if (! RIB_SYSTEM_ROUTE (fib)) | |
933 | rib_uninstall_kernel (rn, fib); | |
934 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
935 | ||
936 | /* Set real nexthop. */ | |
937 | nexthop_active_update (rn, fib, 1); | |
938 | } | |
939 | ||
940 | /* Install new rib into forwarding table. */ | |
941 | if (select) | |
942 | { | |
943 | /* Set real nexthop. */ | |
944 | nexthop_active_update (rn, select, 1); | |
945 | ||
946 | if (! RIB_SYSTEM_ROUTE (select)) | |
947 | rib_install_kernel (rn, select); | |
948 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
949 | redistribute_add (&rn->p, select); | |
950 | } | |
951 | } | |
952 | ||
953 | /* Add RIB to head of the route node. */ | |
954 | void | |
955 | rib_addnode (struct route_node *rn, struct rib *rib) | |
956 | { | |
957 | struct rib *head; | |
958 | ||
959 | head = rn->info; | |
960 | if (head) | |
961 | head->prev = rib; | |
962 | rib->next = head; | |
963 | rn->info = rib; | |
964 | } | |
965 | ||
966 | void | |
967 | rib_delnode (struct route_node *rn, struct rib *rib) | |
968 | { | |
969 | if (rib->next) | |
970 | rib->next->prev = rib->prev; | |
971 | if (rib->prev) | |
972 | rib->prev->next = rib->next; | |
973 | else | |
974 | rn->info = rib->next; | |
975 | } | |
976 | ||
977 | int | |
978 | rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, | |
979 | struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id, | |
980 | u_int32_t metric, u_char distance) | |
981 | { | |
982 | struct rib *rib; | |
983 | struct rib *same = NULL; | |
984 | struct route_table *table; | |
985 | struct route_node *rn; | |
986 | struct nexthop *nexthop; | |
987 | ||
988 | /* Lookup table. */ | |
989 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
990 | if (! table) | |
991 | return 0; | |
992 | ||
993 | /* Make it sure prefixlen is applied to the prefix. */ | |
994 | apply_mask_ipv4 (p); | |
995 | ||
996 | /* Set default distance by route type. */ | |
997 | if (distance == 0) | |
998 | { | |
999 | distance = route_info[type].distance; | |
1000 | ||
1001 | /* iBGP distance is 200. */ | |
1002 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
1003 | distance = 200; | |
1004 | } | |
1005 | ||
1006 | /* Lookup route node.*/ | |
1007 | rn = route_node_get (table, (struct prefix *) p); | |
1008 | ||
1009 | /* If same type of route are installed, treat it as a implicit | |
1010 | withdraw. */ | |
1011 | for (rib = rn->info; rib; rib = rib->next) | |
1012 | { | |
1013 | if (rib->type == ZEBRA_ROUTE_CONNECT) | |
1014 | { | |
1015 | nexthop = rib->nexthop; | |
1016 | ||
1017 | /* Duplicate connected route comes in. */ | |
1018 | if (rib->type == type | |
1019 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX | |
1020 | && nexthop->ifindex == ifindex) | |
1021 | { | |
1022 | rib->refcnt++; | |
1023 | return 0 ; | |
1024 | } | |
1025 | } | |
1026 | else if (rib->type == type) | |
1027 | { | |
1028 | same = rib; | |
1029 | rib_delnode (rn, same); | |
1030 | route_unlock_node (rn); | |
1031 | break; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /* Allocate new rib structure. */ | |
1036 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); | |
1037 | memset (rib, 0, sizeof (struct rib)); | |
1038 | rib->type = type; | |
1039 | rib->distance = distance; | |
1040 | rib->flags = flags; | |
1041 | rib->metric = metric; | |
b5f45021 | 1042 | rib->table = vrf_id; |
718e3744 | 1043 | rib->nexthop_num = 0; |
1044 | rib->uptime = time (NULL); | |
1045 | ||
1046 | /* Nexthop settings. */ | |
1047 | if (gate) | |
1048 | { | |
1049 | if (ifindex) | |
1050 | nexthop_ipv4_ifindex_add (rib, gate, ifindex); | |
1051 | else | |
1052 | nexthop_ipv4_add (rib, gate); | |
1053 | } | |
1054 | else | |
1055 | nexthop_ifindex_add (rib, ifindex); | |
1056 | ||
1057 | /* If this route is kernel route, set FIB flag to the route. */ | |
1058 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
1059 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1060 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1061 | ||
1062 | /* Link new rib to node.*/ | |
1063 | rib_addnode (rn, rib); | |
1064 | ||
1065 | /* Process this route node. */ | |
1066 | rib_process (rn, same); | |
1067 | ||
1068 | /* Free implicit route.*/ | |
1069 | if (same) | |
1070 | newrib_free (same); | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | int | |
1076 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib) | |
1077 | { | |
1078 | struct route_table *table; | |
1079 | struct route_node *rn; | |
1080 | struct rib *same; | |
1081 | struct nexthop *nexthop; | |
1082 | ||
1083 | /* Lookup table. */ | |
1084 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1085 | if (! table) | |
1086 | return 0; | |
1087 | ||
1088 | /* Make it sure prefixlen is applied to the prefix. */ | |
1089 | apply_mask_ipv4 (p); | |
1090 | ||
1091 | /* Set default distance by route type. */ | |
1092 | if (rib->distance == 0) | |
1093 | { | |
1094 | rib->distance = route_info[rib->type].distance; | |
1095 | ||
1096 | /* iBGP distance is 200. */ | |
1097 | if (rib->type == ZEBRA_ROUTE_BGP | |
1098 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
1099 | rib->distance = 200; | |
1100 | } | |
1101 | ||
1102 | /* Lookup route node.*/ | |
1103 | rn = route_node_get (table, (struct prefix *) p); | |
1104 | ||
1105 | /* If same type of route are installed, treat it as a implicit | |
1106 | withdraw. */ | |
1107 | for (same = rn->info; same; same = same->next) | |
1108 | { | |
1109 | if (same->type == rib->type && same->table == rib->table | |
1110 | && same->type != ZEBRA_ROUTE_CONNECT) | |
1111 | { | |
1112 | rib_delnode (rn, same); | |
1113 | route_unlock_node (rn); | |
1114 | break; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* If this route is kernel route, set FIB flag to the route. */ | |
1119 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
1120 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1121 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1122 | ||
1123 | /* Link new rib to node.*/ | |
1124 | rib_addnode (rn, rib); | |
1125 | ||
1126 | /* Process this route node. */ | |
1127 | rib_process (rn, same); | |
1128 | ||
1129 | /* Free implicit route.*/ | |
1130 | if (same) | |
1131 | newrib_free (same); | |
1132 | ||
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | int | |
1137 | rib_delete_ipv4 (int type, int flags, struct prefix_ipv4 *p, | |
1138 | struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id) | |
1139 | { | |
1140 | struct route_table *table; | |
1141 | struct route_node *rn; | |
1142 | struct rib *rib; | |
1143 | struct rib *fib = NULL; | |
1144 | struct rib *same = NULL; | |
1145 | struct nexthop *nexthop; | |
1146 | char buf1[BUFSIZ]; | |
1147 | char buf2[BUFSIZ]; | |
1148 | ||
1149 | /* Lookup table. */ | |
1150 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1151 | if (! table) | |
1152 | return 0; | |
1153 | ||
1154 | /* Apply mask. */ | |
1155 | apply_mask_ipv4 (p); | |
1156 | ||
5ec90d28 | 1157 | if (IS_ZEBRA_DEBUG_KERNEL && gate) |
1158 | zlog_info ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", | |
1159 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), | |
1160 | p->prefixlen, | |
1161 | inet_ntoa (*gate), | |
1162 | ifindex); | |
1163 | ||
718e3744 | 1164 | /* Lookup route node. */ |
1165 | rn = route_node_lookup (table, (struct prefix *) p); | |
1166 | if (! rn) | |
1167 | { | |
1168 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1169 | { | |
1170 | if (gate) | |
1171 | zlog_info ("route %s/%d via %s ifindex %d doesn't exist in rib", | |
1172 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), | |
1173 | p->prefixlen, | |
1174 | inet_ntop (AF_INET, gate, buf2, BUFSIZ), | |
1175 | ifindex); | |
1176 | else | |
1177 | zlog_info ("route %s/%d ifindex %d doesn't exist in rib", | |
1178 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), | |
1179 | p->prefixlen, | |
1180 | ifindex); | |
1181 | } | |
1182 | return ZEBRA_ERR_RTNOEXIST; | |
1183 | } | |
1184 | ||
1185 | /* Lookup same type route. */ | |
1186 | for (rib = rn->info; rib; rib = rib->next) | |
1187 | { | |
1188 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1189 | fib = rib; | |
1190 | ||
1191 | if (rib->type == ZEBRA_ROUTE_CONNECT) | |
1192 | { | |
1193 | nexthop = rib->nexthop; | |
1194 | ||
1195 | if (rib->type == type | |
1196 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX | |
1197 | && nexthop->ifindex == ifindex) | |
1198 | { | |
1199 | if (rib->refcnt) | |
1200 | { | |
1201 | rib->refcnt--; | |
1202 | route_unlock_node (rn); | |
1203 | route_unlock_node (rn); | |
1204 | return 0; | |
1205 | } | |
1206 | same = rib; | |
1207 | break; | |
1208 | } | |
1209 | } | |
5ec90d28 | 1210 | else if (gate) |
1211 | { | |
1212 | nexthop = rib->nexthop; | |
1213 | ||
1214 | /* Make sure that the route found has the same gateway. */ | |
1215 | if (rib->type == type | |
1216 | && nexthop && | |
1217 | (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || | |
1218 | IPV4_ADDR_SAME (&nexthop->rgate.ipv4, gate)) ) | |
1219 | { | |
1220 | same = rib; | |
1221 | break; | |
1222 | } | |
1223 | } | |
718e3744 | 1224 | else |
1225 | { | |
1226 | if (rib->type == type) | |
1227 | { | |
1228 | same = rib; | |
1229 | break; | |
1230 | } | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | /* If same type of route can't be found and this message is from | |
1235 | kernel. */ | |
1236 | if (! same) | |
1237 | { | |
1238 | if (fib && type == ZEBRA_ROUTE_KERNEL) | |
1239 | { | |
1240 | /* Unset flags. */ | |
1241 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1242 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1243 | ||
1244 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1245 | } | |
1246 | else | |
1247 | { | |
1248 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1249 | { | |
1250 | if (gate) | |
1251 | zlog_info ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", | |
1252 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), | |
1253 | p->prefixlen, | |
1254 | inet_ntop (AF_INET, gate, buf2, BUFSIZ), | |
1255 | ifindex, | |
1256 | type); | |
1257 | else | |
1258 | zlog_info ("route %s/%d ifindex %d type %d doesn't exist in rib", | |
1259 | inet_ntop (AF_INET, &p->prefix, buf1, BUFSIZ), | |
1260 | p->prefixlen, | |
1261 | ifindex, | |
1262 | type); | |
1263 | } | |
1264 | route_unlock_node (rn); | |
1265 | return ZEBRA_ERR_RTNOEXIST; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | if (same) | |
1270 | rib_delnode (rn, same); | |
1271 | ||
1272 | /* Process changes. */ | |
1273 | rib_process (rn, same); | |
1274 | ||
1275 | if (same) | |
1276 | { | |
1277 | newrib_free (same); | |
1278 | route_unlock_node (rn); | |
1279 | } | |
1280 | ||
1281 | route_unlock_node (rn); | |
1282 | ||
1283 | return 0; | |
1284 | } | |
1285 | \f | |
1286 | /* Install static route into rib. */ | |
1287 | void | |
1288 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) | |
1289 | { | |
1290 | struct rib *rib; | |
1291 | struct route_node *rn; | |
1292 | struct route_table *table; | |
1293 | ||
1294 | /* Lookup table. */ | |
1295 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1296 | if (! table) | |
1297 | return; | |
1298 | ||
1299 | /* Lookup existing route */ | |
1300 | rn = route_node_get (table, p); | |
1301 | for (rib = rn->info; rib; rib = rib->next) | |
1302 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
1303 | break; | |
1304 | ||
1305 | if (rib) | |
1306 | { | |
1307 | /* Same distance static route is there. Update it with new | |
1308 | nexthop. */ | |
718e3744 | 1309 | route_unlock_node (rn); |
718e3744 | 1310 | switch (si->type) |
7021c425 | 1311 | { |
1312 | case STATIC_IPV4_GATEWAY: | |
1313 | nexthop_ipv4_add (rib, &si->gate.ipv4); | |
1314 | break; | |
1315 | case STATIC_IPV4_IFNAME: | |
1316 | nexthop_ifname_add (rib, si->gate.ifname); | |
1317 | break; | |
1318 | case STATIC_IPV4_BLACKHOLE: | |
1319 | nexthop_blackhole_add (rib); | |
1320 | break; | |
1321 | } | |
718e3744 | 1322 | rib_process (rn, NULL); |
1323 | } | |
1324 | else | |
1325 | { | |
1326 | /* This is new static route. */ | |
1327 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); | |
1328 | memset (rib, 0, sizeof (struct rib)); | |
1329 | ||
1330 | rib->type = ZEBRA_ROUTE_STATIC; | |
1331 | rib->distance = si->distance; | |
1332 | rib->metric = 0; | |
1333 | rib->nexthop_num = 0; | |
1334 | ||
1335 | switch (si->type) | |
7021c425 | 1336 | { |
1337 | case STATIC_IPV4_GATEWAY: | |
1338 | nexthop_ipv4_add (rib, &si->gate.ipv4); | |
1339 | break; | |
1340 | case STATIC_IPV4_IFNAME: | |
1341 | nexthop_ifname_add (rib, si->gate.ifname); | |
1342 | break; | |
1343 | case STATIC_IPV4_BLACKHOLE: | |
1344 | nexthop_blackhole_add (rib); | |
1345 | break; | |
1346 | } | |
718e3744 | 1347 | |
81dfcaa2 | 1348 | /* Save the flags of this static routes (reject, blackhole) */ |
1349 | rib->flags = si->flags; | |
1350 | ||
718e3744 | 1351 | /* Link this rib to the tree. */ |
1352 | rib_addnode (rn, rib); | |
1353 | ||
1354 | /* Process this prefix. */ | |
1355 | rib_process (rn, NULL); | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | int | |
1360 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) | |
1361 | { | |
1362 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1363 | && si->type == STATIC_IPV4_GATEWAY | |
1364 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
1365 | return 1; | |
1366 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
1367 | && si->type == STATIC_IPV4_IFNAME | |
1368 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
1369 | return 1; | |
595db7f1 | 1370 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
1371 | && si->type == STATIC_IPV4_BLACKHOLE) | |
1372 | return 1; | |
718e3744 | 1373 | return 0;; |
1374 | } | |
1375 | ||
1376 | /* Uninstall static route from RIB. */ | |
1377 | void | |
1378 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) | |
1379 | { | |
1380 | struct route_node *rn; | |
1381 | struct rib *rib; | |
1382 | struct nexthop *nexthop; | |
1383 | struct route_table *table; | |
1384 | ||
1385 | /* Lookup table. */ | |
1386 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1387 | if (! table) | |
1388 | return; | |
1389 | ||
1390 | /* Lookup existing route with type and distance. */ | |
1391 | rn = route_node_lookup (table, p); | |
1392 | if (! rn) | |
1393 | return; | |
1394 | ||
1395 | for (rib = rn->info; rib; rib = rib->next) | |
1396 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
1397 | break; | |
1398 | ||
1399 | if (! rib) | |
1400 | { | |
1401 | route_unlock_node (rn); | |
1402 | return; | |
1403 | } | |
1404 | ||
1405 | /* Lookup nexthop. */ | |
1406 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1407 | if (static_ipv4_nexthop_same (nexthop, si)) | |
1408 | break; | |
1409 | ||
1410 | /* Can't find nexthop. */ | |
1411 | if (! nexthop) | |
1412 | { | |
1413 | route_unlock_node (rn); | |
1414 | return; | |
1415 | } | |
1416 | ||
1417 | /* Check nexthop. */ | |
1418 | if (rib->nexthop_num == 1) | |
1419 | { | |
1420 | rib_delnode (rn, rib); | |
1421 | rib_process (rn, rib); | |
1422 | newrib_free (rib); | |
1423 | route_unlock_node (rn); | |
1424 | } | |
1425 | else | |
1426 | { | |
6baeb988 | 1427 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1428 | rib_uninstall (rn, rib); | |
718e3744 | 1429 | nexthop_delete (rib, nexthop); |
1430 | nexthop_free (nexthop); | |
1431 | rib_process (rn, rib); | |
1432 | } | |
1433 | ||
1434 | /* Unlock node. */ | |
1435 | route_unlock_node (rn); | |
1436 | } | |
1437 | ||
1438 | /* Add static route into static route configuration. */ | |
1439 | int | |
1440 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, char *ifname, | |
81dfcaa2 | 1441 | u_char flags, u_char distance, u_int32_t vrf_id) |
718e3744 | 1442 | { |
1443 | u_char type = 0; | |
1444 | struct route_node *rn; | |
1445 | struct static_ipv4 *si; | |
1446 | struct static_ipv4 *pp; | |
1447 | struct static_ipv4 *cp; | |
1448 | struct static_ipv4 *update = NULL; | |
1449 | struct route_table *stable; | |
1450 | ||
1451 | /* Lookup table. */ | |
1452 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
1453 | if (! stable) | |
1454 | return -1; | |
1455 | ||
1456 | /* Lookup static route prefix. */ | |
1457 | rn = route_node_get (stable, p); | |
1458 | ||
1459 | /* Make flags. */ | |
1460 | if (gate) | |
1461 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 1462 | else if (ifname) |
718e3744 | 1463 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 1464 | else |
1465 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 1466 | |
1467 | /* Do nothing if there is a same static route. */ | |
1468 | for (si = rn->info; si; si = si->next) | |
1469 | { | |
1470 | if (type == si->type | |
1471 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
1472 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
1473 | { | |
1474 | if (distance == si->distance) | |
1475 | { | |
1476 | route_unlock_node (rn); | |
1477 | return 0; | |
1478 | } | |
1479 | else | |
1480 | update = si; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | /* Distance chaged. */ | |
1485 | if (update) | |
1486 | static_delete_ipv4 (p, gate, ifname, update->distance, vrf_id); | |
1487 | ||
1488 | /* Make new static route structure. */ | |
1489 | si = XMALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); | |
1490 | memset (si, 0, sizeof (struct static_ipv4)); | |
1491 | ||
1492 | si->type = type; | |
1493 | si->distance = distance; | |
81dfcaa2 | 1494 | si->flags = flags; |
718e3744 | 1495 | |
1496 | if (gate) | |
1497 | si->gate.ipv4 = *gate; | |
1498 | if (ifname) | |
1499 | si->gate.ifname = XSTRDUP (0, ifname); | |
1500 | ||
1501 | /* Add new static route information to the tree with sort by | |
1502 | distance value and gateway address. */ | |
1503 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
1504 | { | |
1505 | if (si->distance < cp->distance) | |
1506 | break; | |
1507 | if (si->distance > cp->distance) | |
1508 | continue; | |
1509 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
1510 | { | |
1511 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
1512 | break; | |
1513 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
1514 | continue; | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | /* Make linked list. */ | |
1519 | if (pp) | |
1520 | pp->next = si; | |
1521 | else | |
1522 | rn->info = si; | |
1523 | if (cp) | |
1524 | cp->prev = si; | |
1525 | si->prev = pp; | |
1526 | si->next = cp; | |
1527 | ||
1528 | /* Install into rib. */ | |
1529 | static_install_ipv4 (p, si); | |
1530 | ||
1531 | return 1; | |
1532 | } | |
1533 | ||
1534 | /* Delete static route from static route configuration. */ | |
1535 | int | |
1536 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, char *ifname, | |
1537 | u_char distance, u_int32_t vrf_id) | |
1538 | { | |
1539 | u_char type = 0; | |
1540 | struct route_node *rn; | |
1541 | struct static_ipv4 *si; | |
1542 | struct route_table *stable; | |
1543 | ||
1544 | /* Lookup table. */ | |
1545 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
1546 | if (! stable) | |
1547 | return -1; | |
1548 | ||
1549 | /* Lookup static route prefix. */ | |
1550 | rn = route_node_lookup (stable, p); | |
1551 | if (! rn) | |
1552 | return 0; | |
1553 | ||
1554 | /* Make flags. */ | |
1555 | if (gate) | |
1556 | type = STATIC_IPV4_GATEWAY; | |
1557 | else if (ifname) | |
1558 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 1559 | else |
1560 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 1561 | |
1562 | /* Find same static route is the tree */ | |
1563 | for (si = rn->info; si; si = si->next) | |
1564 | if (type == si->type | |
1565 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
1566 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
1567 | break; | |
1568 | ||
1569 | /* Can't find static route. */ | |
1570 | if (! si) | |
1571 | { | |
1572 | route_unlock_node (rn); | |
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | /* Install into rib. */ | |
1577 | static_uninstall_ipv4 (p, si); | |
1578 | ||
1579 | /* Unlink static route from linked list. */ | |
1580 | if (si->prev) | |
1581 | si->prev->next = si->next; | |
1582 | else | |
1583 | rn->info = si->next; | |
1584 | if (si->next) | |
1585 | si->next->prev = si->prev; | |
143a385f | 1586 | route_unlock_node (rn); |
718e3744 | 1587 | |
1588 | /* Free static route configuration. */ | |
a0f6acd8 | 1589 | if (ifname) |
1590 | XFREE (0, si->gate.ifname); | |
718e3744 | 1591 | XFREE (MTYPE_STATIC_IPV4, si); |
1592 | ||
143a385f | 1593 | route_unlock_node (rn); |
1594 | ||
718e3744 | 1595 | return 1; |
1596 | } | |
1597 | ||
1598 | \f | |
1599 | #ifdef HAVE_IPV6 | |
1600 | int | |
1601 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, | |
1602 | struct in6_addr *gate, unsigned int ifindex, int table) | |
1603 | { | |
726f9b2b | 1604 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
1605 | #if defined (MUSICA) || defined (LINUX) | |
1606 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
1607 | if (p->prefixlen == 96) | |
1608 | return 0; | |
1609 | #endif /* MUSICA */ | |
718e3744 | 1610 | return 1; |
726f9b2b | 1611 | } |
718e3744 | 1612 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
1613 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
1614 | { | |
1615 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
1616 | return 1; | |
1617 | } | |
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | int | |
1622 | rib_add_ipv6 (int type, int flags, struct prefix_ipv6 *p, | |
1623 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id) | |
1624 | { | |
1625 | struct rib *rib; | |
1626 | struct rib *same = NULL; | |
1627 | struct route_table *table; | |
1628 | struct route_node *rn; | |
1629 | struct nexthop *nexthop; | |
1630 | ||
1631 | int distance; | |
1632 | u_int32_t metric = 0; | |
1633 | ||
1634 | /* Lookup table. */ | |
1635 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1636 | if (! table) | |
1637 | return 0; | |
1638 | ||
1639 | /* Make sure mask is applied. */ | |
1640 | apply_mask_ipv6 (p); | |
1641 | ||
1642 | /* Set default distance by route type. */ | |
1643 | distance = route_info[type].distance; | |
1644 | ||
1645 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
1646 | distance = 200; | |
1647 | ||
1648 | /* Filter bogus route. */ | |
1649 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
1650 | return 0; | |
1651 | ||
1652 | /* Lookup route node.*/ | |
1653 | rn = route_node_get (table, (struct prefix *) p); | |
1654 | ||
1655 | /* If same type of route are installed, treat it as a implicit | |
1656 | withdraw. */ | |
1657 | for (rib = rn->info; rib; rib = rib->next) | |
1658 | { | |
1659 | if (rib->type == ZEBRA_ROUTE_CONNECT) | |
1660 | { | |
1661 | nexthop = rib->nexthop; | |
1662 | ||
1663 | if (rib->type == type | |
1664 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX | |
1665 | && nexthop->ifindex == ifindex) | |
1666 | { | |
1667 | rib->refcnt++; | |
1668 | return 0; | |
1669 | } | |
1670 | } | |
1671 | else if (rib->type == type) | |
1672 | { | |
1673 | same = rib; | |
1674 | rib_delnode (rn, same); | |
1675 | route_unlock_node (rn); | |
1676 | break; | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | /* Allocate new rib structure. */ | |
1681 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); | |
1682 | memset (rib, 0, sizeof (struct rib)); | |
1683 | rib->type = type; | |
1684 | rib->distance = distance; | |
1685 | rib->flags = flags; | |
1686 | rib->metric = metric; | |
b5f45021 | 1687 | rib->table = vrf_id; |
718e3744 | 1688 | rib->nexthop_num = 0; |
1689 | rib->uptime = time (NULL); | |
1690 | ||
1691 | /* Nexthop settings. */ | |
1692 | if (gate) | |
1693 | { | |
1694 | if (ifindex) | |
1695 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
1696 | else | |
1697 | nexthop_ipv6_add (rib, gate); | |
1698 | } | |
1699 | else | |
1700 | nexthop_ifindex_add (rib, ifindex); | |
1701 | ||
1702 | /* If this route is kernel route, set FIB flag to the route. */ | |
1703 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
1704 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1705 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1706 | ||
1707 | /* Link new rib to node.*/ | |
1708 | rib_addnode (rn, rib); | |
1709 | ||
1710 | /* Process this route node. */ | |
1711 | rib_process (rn, same); | |
1712 | ||
1713 | /* Free implicit route.*/ | |
1714 | if (same) | |
1715 | newrib_free (same); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | int | |
1721 | rib_delete_ipv6 (int type, int flags, struct prefix_ipv6 *p, | |
1722 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id) | |
1723 | { | |
1724 | struct route_table *table; | |
1725 | struct route_node *rn; | |
1726 | struct rib *rib; | |
1727 | struct rib *fib = NULL; | |
1728 | struct rib *same = NULL; | |
1729 | struct nexthop *nexthop; | |
1730 | char buf1[BUFSIZ]; | |
1731 | char buf2[BUFSIZ]; | |
1732 | ||
1733 | /* Apply mask. */ | |
1734 | apply_mask_ipv6 (p); | |
1735 | ||
1736 | /* Lookup table. */ | |
1737 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1738 | if (! table) | |
1739 | return 0; | |
1740 | ||
1741 | /* Lookup route node. */ | |
1742 | rn = route_node_lookup (table, (struct prefix *) p); | |
1743 | if (! rn) | |
1744 | { | |
1745 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1746 | { | |
1747 | if (gate) | |
1748 | zlog_info ("route %s/%d via %s ifindex %d doesn't exist in rib", | |
1749 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), | |
1750 | p->prefixlen, | |
1751 | inet_ntop (AF_INET6, gate, buf2, BUFSIZ), | |
1752 | ifindex); | |
1753 | else | |
1754 | zlog_info ("route %s/%d ifindex %d doesn't exist in rib", | |
1755 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), | |
1756 | p->prefixlen, | |
1757 | ifindex); | |
1758 | } | |
1759 | return ZEBRA_ERR_RTNOEXIST; | |
1760 | } | |
1761 | ||
1762 | /* Lookup same type route. */ | |
1763 | for (rib = rn->info; rib; rib = rib->next) | |
1764 | { | |
1765 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1766 | fib = rib; | |
1767 | ||
1768 | if (rib->type == ZEBRA_ROUTE_CONNECT) | |
1769 | { | |
1770 | nexthop = rib->nexthop; | |
1771 | ||
1772 | if (rib->type == type | |
1773 | && nexthop && nexthop->type == NEXTHOP_TYPE_IFINDEX | |
1774 | && nexthop->ifindex == ifindex) | |
1775 | { | |
1776 | if (rib->refcnt) | |
1777 | { | |
1778 | rib->refcnt--; | |
1779 | route_unlock_node (rn); | |
1780 | route_unlock_node (rn); | |
1781 | return 0; | |
1782 | } | |
1783 | same = rib; | |
1784 | break; | |
1785 | } | |
1786 | } | |
1787 | else | |
1788 | { | |
1789 | if (rib->type == type) | |
1790 | { | |
1791 | same = rib; | |
1792 | break; | |
1793 | } | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | /* If same type of route can't be found and this message is from | |
1798 | kernel. */ | |
1799 | if (! same) | |
1800 | { | |
1801 | if (fib && type == ZEBRA_ROUTE_KERNEL) | |
1802 | { | |
1803 | /* Unset flags. */ | |
1804 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1805 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1806 | ||
1807 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1808 | } | |
1809 | else | |
1810 | { | |
1811 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1812 | { | |
1813 | if (gate) | |
1814 | zlog_info ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", | |
1815 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), | |
1816 | p->prefixlen, | |
1817 | inet_ntop (AF_INET6, gate, buf2, BUFSIZ), | |
1818 | ifindex, | |
1819 | type); | |
1820 | else | |
1821 | zlog_info ("route %s/%d ifindex %d type %d doesn't exist in rib", | |
1822 | inet_ntop (AF_INET6, &p->prefix, buf1, BUFSIZ), | |
1823 | p->prefixlen, | |
1824 | ifindex, | |
1825 | type); | |
1826 | } | |
1827 | route_unlock_node (rn); | |
1828 | return ZEBRA_ERR_RTNOEXIST; | |
1829 | } | |
1830 | } | |
1831 | ||
1832 | if (same) | |
1833 | rib_delnode (rn, same); | |
1834 | ||
1835 | /* Process changes. */ | |
1836 | rib_process (rn, same); | |
1837 | ||
1838 | if (same) | |
1839 | { | |
1840 | newrib_free (same); | |
1841 | route_unlock_node (rn); | |
1842 | } | |
1843 | ||
1844 | route_unlock_node (rn); | |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | \f | |
1849 | /* Install static route into rib. */ | |
1850 | void | |
1851 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) | |
1852 | { | |
1853 | struct rib *rib; | |
1854 | struct route_table *table; | |
1855 | struct route_node *rn; | |
1856 | ||
1857 | /* Lookup table. */ | |
1858 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1859 | if (! table) | |
1860 | return; | |
1861 | ||
1862 | /* Lookup existing route */ | |
1863 | rn = route_node_get (table, p); | |
1864 | for (rib = rn->info; rib; rib = rib->next) | |
1865 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
1866 | break; | |
1867 | ||
1868 | if (rib) | |
1869 | { | |
1870 | /* Same distance static route is there. Update it with new | |
1871 | nexthop. */ | |
718e3744 | 1872 | route_unlock_node (rn); |
1873 | ||
1874 | switch (si->type) | |
1875 | { | |
1876 | case STATIC_IPV6_GATEWAY: | |
1877 | nexthop_ipv6_add (rib, &si->ipv6); | |
1878 | break; | |
1879 | case STATIC_IPV6_IFNAME: | |
1880 | nexthop_ifname_add (rib, si->ifname); | |
1881 | break; | |
1882 | case STATIC_IPV6_GATEWAY_IFNAME: | |
1883 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
1884 | break; | |
1885 | } | |
1886 | rib_process (rn, NULL); | |
1887 | } | |
1888 | else | |
1889 | { | |
1890 | /* This is new static route. */ | |
1891 | rib = XMALLOC (MTYPE_RIB, sizeof (struct rib)); | |
1892 | memset (rib, 0, sizeof (struct rib)); | |
1893 | ||
1894 | rib->type = ZEBRA_ROUTE_STATIC; | |
1895 | rib->distance = si->distance; | |
1896 | rib->metric = 0; | |
1897 | rib->nexthop_num = 0; | |
1898 | ||
1899 | switch (si->type) | |
1900 | { | |
1901 | case STATIC_IPV6_GATEWAY: | |
1902 | nexthop_ipv6_add (rib, &si->ipv6); | |
1903 | break; | |
1904 | case STATIC_IPV6_IFNAME: | |
1905 | nexthop_ifname_add (rib, si->ifname); | |
1906 | break; | |
1907 | case STATIC_IPV6_GATEWAY_IFNAME: | |
1908 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
1909 | break; | |
1910 | } | |
1911 | ||
81dfcaa2 | 1912 | /* Save the flags of this static routes (reject, blackhole) */ |
1913 | rib->flags = si->flags; | |
1914 | ||
718e3744 | 1915 | /* Link this rib to the tree. */ |
1916 | rib_addnode (rn, rib); | |
1917 | ||
1918 | /* Process this prefix. */ | |
1919 | rib_process (rn, NULL); | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | int | |
1924 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) | |
1925 | { | |
1926 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1927 | && si->type == STATIC_IPV6_GATEWAY | |
1928 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
1929 | return 1; | |
1930 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
1931 | && si->type == STATIC_IPV6_IFNAME | |
1932 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
1933 | return 1; | |
1934 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
1935 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
1936 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
1937 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
1938 | return 1; | |
1939 | return 0;; | |
1940 | } | |
1941 | ||
1942 | void | |
1943 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) | |
1944 | { | |
1945 | struct route_table *table; | |
1946 | struct route_node *rn; | |
1947 | struct rib *rib; | |
1948 | struct nexthop *nexthop; | |
1949 | ||
1950 | /* Lookup table. */ | |
1951 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1952 | if (! table) | |
1953 | return; | |
1954 | ||
1955 | /* Lookup existing route with type and distance. */ | |
1956 | rn = route_node_lookup (table, (struct prefix *) p); | |
1957 | if (! rn) | |
1958 | return; | |
1959 | ||
1960 | for (rib = rn->info; rib; rib = rib->next) | |
1961 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
1962 | break; | |
1963 | if (! rib) | |
1964 | { | |
1965 | route_unlock_node (rn); | |
1966 | return; | |
1967 | } | |
1968 | ||
1969 | /* Lookup nexthop. */ | |
1970 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1971 | if (static_ipv6_nexthop_same (nexthop, si)) | |
1972 | break; | |
1973 | ||
1974 | /* Can't find nexthop. */ | |
1975 | if (! nexthop) | |
1976 | { | |
1977 | route_unlock_node (rn); | |
1978 | return; | |
1979 | } | |
1980 | ||
1981 | /* Check nexthop. */ | |
1982 | if (rib->nexthop_num == 1) | |
1983 | { | |
1984 | rib_delnode (rn, rib); | |
1985 | rib_process (rn, rib); | |
1986 | newrib_free (rib); | |
1987 | route_unlock_node (rn); | |
1988 | } | |
1989 | else | |
1990 | { | |
6baeb988 | 1991 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1992 | rib_uninstall (rn, rib); | |
718e3744 | 1993 | nexthop_delete (rib, nexthop); |
1994 | nexthop_free (nexthop); | |
1995 | rib_process (rn, rib); | |
1996 | } | |
1997 | ||
1998 | /* Unlock node. */ | |
1999 | route_unlock_node (rn); | |
2000 | } | |
2001 | ||
2002 | /* Add static route into static route configuration. */ | |
2003 | int | |
2004 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
81dfcaa2 | 2005 | char *ifname, u_char flags, u_char distance, u_int32_t vrf_id) |
718e3744 | 2006 | { |
2007 | struct route_node *rn; | |
2008 | struct static_ipv6 *si; | |
2009 | struct static_ipv6 *pp; | |
2010 | struct static_ipv6 *cp; | |
2011 | struct route_table *stable; | |
2012 | ||
2013 | /* Lookup table. */ | |
2014 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
2015 | if (! stable) | |
2016 | return -1; | |
2017 | ||
2018 | /* Lookup static route prefix. */ | |
2019 | rn = route_node_get (stable, p); | |
2020 | ||
2021 | /* Do nothing if there is a same static route. */ | |
2022 | for (si = rn->info; si; si = si->next) | |
2023 | { | |
2024 | if (distance == si->distance | |
2025 | && type == si->type | |
2026 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
2027 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
2028 | { | |
2029 | route_unlock_node (rn); | |
2030 | return 0; | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | /* Make new static route structure. */ | |
2035 | si = XMALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); | |
2036 | memset (si, 0, sizeof (struct static_ipv6)); | |
2037 | ||
2038 | si->type = type; | |
2039 | si->distance = distance; | |
81dfcaa2 | 2040 | si->flags = flags; |
718e3744 | 2041 | |
2042 | switch (type) | |
2043 | { | |
2044 | case STATIC_IPV6_GATEWAY: | |
2045 | si->ipv6 = *gate; | |
2046 | break; | |
2047 | case STATIC_IPV6_IFNAME: | |
2048 | si->ifname = XSTRDUP (0, ifname); | |
2049 | break; | |
2050 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2051 | si->ipv6 = *gate; | |
2052 | si->ifname = XSTRDUP (0, ifname); | |
2053 | break; | |
2054 | } | |
2055 | ||
2056 | /* Add new static route information to the tree with sort by | |
2057 | distance value and gateway address. */ | |
2058 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2059 | { | |
2060 | if (si->distance < cp->distance) | |
2061 | break; | |
2062 | if (si->distance > cp->distance) | |
2063 | continue; | |
2064 | } | |
2065 | ||
2066 | /* Make linked list. */ | |
2067 | if (pp) | |
2068 | pp->next = si; | |
2069 | else | |
2070 | rn->info = si; | |
2071 | if (cp) | |
2072 | cp->prev = si; | |
2073 | si->prev = pp; | |
2074 | si->next = cp; | |
2075 | ||
2076 | /* Install into rib. */ | |
2077 | static_install_ipv6 (p, si); | |
2078 | ||
2079 | return 1; | |
2080 | } | |
2081 | ||
2082 | /* Delete static route from static route configuration. */ | |
2083 | int | |
2084 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
2085 | char *ifname, u_char distance, u_int32_t vrf_id) | |
2086 | { | |
2087 | struct route_node *rn; | |
2088 | struct static_ipv6 *si; | |
2089 | struct route_table *stable; | |
2090 | ||
2091 | /* Lookup table. */ | |
2092 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
2093 | if (! stable) | |
2094 | return -1; | |
2095 | ||
2096 | /* Lookup static route prefix. */ | |
2097 | rn = route_node_lookup (stable, p); | |
2098 | if (! rn) | |
2099 | return 0; | |
2100 | ||
2101 | /* Find same static route is the tree */ | |
2102 | for (si = rn->info; si; si = si->next) | |
2103 | if (distance == si->distance | |
2104 | && type == si->type | |
2105 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
2106 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
2107 | break; | |
2108 | ||
2109 | /* Can't find static route. */ | |
2110 | if (! si) | |
2111 | { | |
2112 | route_unlock_node (rn); | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | /* Install into rib. */ | |
2117 | static_uninstall_ipv6 (p, si); | |
2118 | ||
2119 | /* Unlink static route from linked list. */ | |
2120 | if (si->prev) | |
2121 | si->prev->next = si->next; | |
2122 | else | |
2123 | rn->info = si->next; | |
2124 | if (si->next) | |
2125 | si->next->prev = si->prev; | |
2126 | ||
2127 | /* Free static route configuration. */ | |
a0f6acd8 | 2128 | if (ifname) |
2129 | XFREE (0, si->ifname); | |
718e3744 | 2130 | XFREE (MTYPE_STATIC_IPV6, si); |
2131 | ||
2132 | return 1; | |
2133 | } | |
2134 | #endif /* HAVE_IPV6 */ | |
2135 | \f | |
2136 | /* RIB update function. */ | |
2137 | void | |
2138 | rib_update () | |
2139 | { | |
2140 | struct route_node *rn; | |
2141 | struct route_table *table; | |
2142 | ||
2143 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2144 | if (table) | |
2145 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2146 | rib_process (rn, NULL); | |
2147 | ||
2148 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2149 | if (table) | |
2150 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2151 | rib_process (rn, NULL); | |
2152 | } | |
2153 | ||
2154 | /* Interface goes up. */ | |
2155 | void | |
2156 | rib_if_up (struct interface *ifp) | |
2157 | { | |
2158 | rib_update (); | |
2159 | } | |
2160 | ||
2161 | /* Interface goes down. */ | |
2162 | void | |
2163 | rib_if_down (struct interface *ifp) | |
2164 | { | |
2165 | rib_update (); | |
2166 | } | |
2167 | \f | |
2168 | /* Remove all routes which comes from non main table. */ | |
2169 | void | |
2170 | rib_weed_table (struct route_table *table) | |
2171 | { | |
2172 | struct route_node *rn; | |
2173 | struct rib *rib; | |
2174 | struct rib *next; | |
2175 | ||
2176 | if (table) | |
2177 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2178 | for (rib = rn->info; rib; rib = next) | |
2179 | { | |
2180 | next = rib->next; | |
2181 | ||
b21b19c5 | 2182 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 2183 | rib->table != RT_TABLE_MAIN) |
2184 | { | |
2185 | rib_delnode (rn, rib); | |
2186 | newrib_free (rib); | |
2187 | route_unlock_node (rn); | |
2188 | } | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* Delete all routes from non main table. */ | |
2193 | void | |
2194 | rib_weed_tables () | |
2195 | { | |
2196 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
2197 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2198 | } | |
2199 | \f | |
2200 | /* Delete self installed routes after zebra is relaunched. */ | |
2201 | void | |
2202 | rib_sweep_table (struct route_table *table) | |
2203 | { | |
2204 | struct route_node *rn; | |
2205 | struct rib *rib; | |
2206 | struct rib *next; | |
2207 | int ret = 0; | |
2208 | ||
2209 | if (table) | |
2210 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2211 | for (rib = rn->info; rib; rib = next) | |
2212 | { | |
2213 | next = rib->next; | |
2214 | ||
2215 | if (rib->type == ZEBRA_ROUTE_KERNEL && | |
2216 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
2217 | { | |
2218 | ret = rib_uninstall_kernel (rn, rib); | |
2219 | if (! ret) | |
2220 | { | |
2221 | rib_delnode (rn, rib); | |
2222 | newrib_free (rib); | |
2223 | route_unlock_node (rn); | |
2224 | } | |
2225 | } | |
2226 | } | |
2227 | } | |
2228 | ||
2229 | /* Sweep all RIB tables. */ | |
2230 | void | |
2231 | rib_sweep_route () | |
2232 | { | |
2233 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
2234 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2235 | } | |
2236 | \f | |
2237 | /* Close RIB and clean up kernel routes. */ | |
2238 | void | |
2239 | rib_close_table (struct route_table *table) | |
2240 | { | |
2241 | struct route_node *rn; | |
2242 | struct rib *rib; | |
2243 | ||
2244 | if (table) | |
2245 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2246 | for (rib = rn->info; rib; rib = rib->next) | |
2247 | if (! RIB_SYSTEM_ROUTE (rib) | |
2248 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
2249 | rib_uninstall_kernel (rn, rib); | |
2250 | } | |
2251 | ||
2252 | /* Close all RIB tables. */ | |
2253 | void | |
2254 | rib_close () | |
2255 | { | |
2256 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
2257 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2258 | } | |
2259 | \f | |
2260 | /* Routing information base initialize. */ | |
2261 | void | |
2262 | rib_init () | |
2263 | { | |
2264 | /* VRF initialization. */ | |
2265 | vrf_init (); | |
2266 | } |