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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" | |
4d38fdb4 | 32 | #include "linklist.h" |
33 | #include "thread.h" | |
34 | #include "workqueue.h" | |
7514fb77 PJ |
35 | #include "prefix.h" |
36 | #include "routemap.h" | |
718e3744 | 37 | |
38 | #include "zebra/rib.h" | |
39 | #include "zebra/rt.h" | |
40 | #include "zebra/zserv.h" | |
41 | #include "zebra/redistribute.h" | |
42 | #include "zebra/debug.h" | |
43 | ||
44 | /* Default rtm_table for all clients */ | |
b21b19c5 | 45 | extern struct zebra_t zebrad; |
718e3744 | 46 | |
457eb9af PJ |
47 | /* Hold time for RIB process, should be very minimal. |
48 | * it is useful to able to set it otherwise for testing, hence exported | |
49 | * as global here for test-rig code. | |
50 | */ | |
51 | int rib_process_hold_time = 10; | |
52 | ||
718e3744 | 53 | /* Each route type's string and default distance value. */ |
d145bc00 | 54 | static const struct |
718e3744 | 55 | { |
56 | int key; | |
57 | int distance; | |
58 | } route_info[] = | |
59 | { | |
60 | {ZEBRA_ROUTE_SYSTEM, 0}, | |
61 | {ZEBRA_ROUTE_KERNEL, 0}, | |
62 | {ZEBRA_ROUTE_CONNECT, 0}, | |
63 | {ZEBRA_ROUTE_STATIC, 1}, | |
64 | {ZEBRA_ROUTE_RIP, 120}, | |
65 | {ZEBRA_ROUTE_RIPNG, 120}, | |
66 | {ZEBRA_ROUTE_OSPF, 110}, | |
67 | {ZEBRA_ROUTE_OSPF6, 110}, | |
9e867fe6 | 68 | {ZEBRA_ROUTE_ISIS, 115}, |
718e3744 | 69 | {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */} |
70 | }; | |
71 | \f | |
72 | /* Vector for routing table. */ | |
d145bc00 | 73 | static vector vrf_vector; |
718e3744 | 74 | |
75 | /* Allocate new VRF. */ | |
a1ac18c4 | 76 | static struct vrf * |
fce954f8 | 77 | vrf_alloc (const char *name) |
718e3744 | 78 | { |
79 | struct vrf *vrf; | |
80 | ||
81 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); | |
82 | ||
83 | /* Put name. */ | |
84 | if (name) | |
85 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); | |
86 | ||
87 | /* Allocate routing table and static table. */ | |
88 | vrf->table[AFI_IP][SAFI_UNICAST] = route_table_init (); | |
89 | vrf->table[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
90 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); | |
91 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
92 | ||
93 | return vrf; | |
94 | } | |
95 | ||
718e3744 | 96 | /* Lookup VRF by identifier. */ |
97 | struct vrf * | |
98 | vrf_lookup (u_int32_t id) | |
99 | { | |
100 | return vector_lookup (vrf_vector, id); | |
101 | } | |
102 | ||
718e3744 | 103 | /* Initialize VRF. */ |
a1ac18c4 | 104 | static void |
105 | vrf_init (void) | |
718e3744 | 106 | { |
107 | struct vrf *default_table; | |
108 | ||
109 | /* Allocate VRF vector. */ | |
110 | vrf_vector = vector_init (1); | |
111 | ||
112 | /* Allocate default main table. */ | |
113 | default_table = vrf_alloc ("Default-IP-Routing-Table"); | |
114 | ||
115 | /* Default table index must be 0. */ | |
116 | vector_set_index (vrf_vector, 0, default_table); | |
117 | } | |
118 | ||
119 | /* Lookup route table. */ | |
120 | struct route_table * | |
121 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) | |
122 | { | |
123 | struct vrf *vrf; | |
124 | ||
125 | vrf = vrf_lookup (id); | |
126 | if (! vrf) | |
127 | return NULL; | |
128 | ||
129 | return vrf->table[afi][safi]; | |
130 | } | |
131 | ||
132 | /* Lookup static route table. */ | |
133 | struct route_table * | |
134 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) | |
135 | { | |
136 | struct vrf *vrf; | |
137 | ||
138 | vrf = vrf_lookup (id); | |
139 | if (! vrf) | |
140 | return NULL; | |
141 | ||
142 | return vrf->stable[afi][safi]; | |
143 | } | |
144 | \f | |
145 | /* Add nexthop to the end of the list. */ | |
a1ac18c4 | 146 | static void |
718e3744 | 147 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
148 | { | |
149 | struct nexthop *last; | |
150 | ||
151 | for (last = rib->nexthop; last && last->next; last = last->next) | |
152 | ; | |
153 | if (last) | |
154 | last->next = nexthop; | |
155 | else | |
156 | rib->nexthop = nexthop; | |
157 | nexthop->prev = last; | |
158 | ||
159 | rib->nexthop_num++; | |
160 | } | |
161 | ||
162 | /* Delete specified nexthop from the list. */ | |
a1ac18c4 | 163 | static void |
718e3744 | 164 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
165 | { | |
166 | if (nexthop->next) | |
167 | nexthop->next->prev = nexthop->prev; | |
168 | if (nexthop->prev) | |
169 | nexthop->prev->next = nexthop->next; | |
170 | else | |
171 | rib->nexthop = nexthop->next; | |
172 | rib->nexthop_num--; | |
173 | } | |
174 | ||
175 | /* Free nexthop. */ | |
a1ac18c4 | 176 | static void |
718e3744 | 177 | nexthop_free (struct nexthop *nexthop) |
178 | { | |
a4b70768 | 179 | if (nexthop->ifname) |
180 | XFREE (0, nexthop->ifname); | |
718e3744 | 181 | XFREE (MTYPE_NEXTHOP, nexthop); |
182 | } | |
183 | ||
184 | struct nexthop * | |
185 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
186 | { | |
187 | struct nexthop *nexthop; | |
188 | ||
393deb9b | 189 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 190 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
191 | nexthop->ifindex = ifindex; | |
192 | ||
193 | nexthop_add (rib, nexthop); | |
194 | ||
195 | return nexthop; | |
196 | } | |
197 | ||
198 | struct nexthop * | |
199 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
200 | { | |
201 | struct nexthop *nexthop; | |
202 | ||
393deb9b | 203 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 204 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
a4b70768 | 205 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 206 | |
207 | nexthop_add (rib, nexthop); | |
208 | ||
209 | return nexthop; | |
210 | } | |
211 | ||
212 | struct nexthop * | |
7514fb77 | 213 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 214 | { |
215 | struct nexthop *nexthop; | |
216 | ||
393deb9b | 217 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 218 | nexthop->type = NEXTHOP_TYPE_IPV4; |
219 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
220 | if (src) |
221 | nexthop->src.ipv4 = *src; | |
718e3744 | 222 | |
223 | nexthop_add (rib, nexthop); | |
224 | ||
225 | return nexthop; | |
226 | } | |
227 | ||
26e2ae36 | 228 | struct nexthop * |
718e3744 | 229 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
7514fb77 | 230 | struct in_addr *src, unsigned int ifindex) |
718e3744 | 231 | { |
232 | struct nexthop *nexthop; | |
233 | ||
393deb9b | 234 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 235 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
236 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
237 | if (src) |
238 | nexthop->src.ipv4 = *src; | |
718e3744 | 239 | nexthop->ifindex = ifindex; |
240 | ||
241 | nexthop_add (rib, nexthop); | |
242 | ||
243 | return nexthop; | |
244 | } | |
245 | ||
246 | #ifdef HAVE_IPV6 | |
247 | struct nexthop * | |
248 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
249 | { | |
250 | struct nexthop *nexthop; | |
251 | ||
393deb9b | 252 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 253 | nexthop->type = NEXTHOP_TYPE_IPV6; |
254 | nexthop->gate.ipv6 = *ipv6; | |
255 | ||
256 | nexthop_add (rib, nexthop); | |
257 | ||
258 | return nexthop; | |
259 | } | |
260 | ||
a1ac18c4 | 261 | static struct nexthop * |
718e3744 | 262 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
263 | char *ifname) | |
264 | { | |
265 | struct nexthop *nexthop; | |
266 | ||
393deb9b | 267 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 268 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
269 | nexthop->gate.ipv6 = *ipv6; | |
270 | nexthop->ifname = XSTRDUP (0, ifname); | |
271 | ||
272 | nexthop_add (rib, nexthop); | |
273 | ||
274 | return nexthop; | |
275 | } | |
276 | ||
a1ac18c4 | 277 | static struct nexthop * |
718e3744 | 278 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
279 | unsigned int ifindex) | |
280 | { | |
281 | struct nexthop *nexthop; | |
282 | ||
393deb9b | 283 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 284 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
285 | nexthop->gate.ipv6 = *ipv6; | |
286 | nexthop->ifindex = ifindex; | |
287 | ||
288 | nexthop_add (rib, nexthop); | |
289 | ||
290 | return nexthop; | |
291 | } | |
292 | #endif /* HAVE_IPV6 */ | |
293 | ||
595db7f1 | 294 | struct nexthop * |
295 | nexthop_blackhole_add (struct rib *rib) | |
296 | { | |
297 | struct nexthop *nexthop; | |
298 | ||
393deb9b | 299 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
595db7f1 | 300 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
301 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
302 | ||
303 | nexthop_add (rib, nexthop); | |
304 | ||
305 | return nexthop; | |
306 | } | |
307 | ||
718e3744 | 308 | /* If force flag is not set, do not modify falgs at all for uninstall |
309 | the route from FIB. */ | |
a1ac18c4 | 310 | static int |
718e3744 | 311 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
312 | struct route_node *top) | |
313 | { | |
314 | struct prefix_ipv4 p; | |
315 | struct route_table *table; | |
316 | struct route_node *rn; | |
317 | struct rib *match; | |
318 | struct nexthop *newhop; | |
319 | ||
320 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
321 | nexthop->ifindex = 0; | |
322 | ||
323 | if (set) | |
324 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
325 | ||
326 | /* Make lookup prefix. */ | |
327 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
328 | p.family = AF_INET; | |
329 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
330 | p.prefix = nexthop->gate.ipv4; | |
331 | ||
332 | /* Lookup table. */ | |
333 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
334 | if (! table) | |
335 | return 0; | |
336 | ||
337 | rn = route_node_match (table, (struct prefix *) &p); | |
338 | while (rn) | |
339 | { | |
340 | route_unlock_node (rn); | |
341 | ||
a50c107e | 342 | /* If lookup self prefix return immediately. */ |
718e3744 | 343 | if (rn == top) |
344 | return 0; | |
345 | ||
346 | /* Pick up selected route. */ | |
347 | for (match = rn->info; match; match = match->next) | |
16814f96 SH |
348 | { |
349 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
350 | continue; | |
351 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
352 | break; | |
353 | } | |
718e3744 | 354 | |
355 | /* If there is no selected route or matched route is EGP, go up | |
356 | tree. */ | |
357 | if (! match | |
358 | || match->type == ZEBRA_ROUTE_BGP) | |
359 | { | |
360 | do { | |
361 | rn = rn->parent; | |
362 | } while (rn && rn->info == NULL); | |
363 | if (rn) | |
364 | route_lock_node (rn); | |
365 | } | |
366 | else | |
367 | { | |
368 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
369 | { | |
370 | /* Directly point connected route. */ | |
371 | newhop = match->nexthop; | |
372 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
373 | nexthop->ifindex = newhop->ifindex; | |
374 | ||
375 | return 1; | |
376 | } | |
377 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
378 | { | |
379 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
380 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
381 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
382 | { | |
383 | if (set) | |
384 | { | |
385 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
386 | nexthop->rtype = newhop->type; | |
387 | if (newhop->type == NEXTHOP_TYPE_IPV4 || | |
388 | newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
389 | nexthop->rgate.ipv4 = newhop->gate.ipv4; | |
390 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
391 | || newhop->type == NEXTHOP_TYPE_IFNAME | |
392 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
393 | nexthop->rifindex = newhop->ifindex; | |
394 | } | |
395 | return 1; | |
396 | } | |
397 | return 0; | |
398 | } | |
399 | else | |
400 | { | |
401 | return 0; | |
402 | } | |
403 | } | |
404 | } | |
405 | return 0; | |
406 | } | |
407 | ||
408 | #ifdef HAVE_IPV6 | |
409 | /* If force flag is not set, do not modify falgs at all for uninstall | |
410 | the route from FIB. */ | |
a1ac18c4 | 411 | static int |
718e3744 | 412 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
413 | struct route_node *top) | |
414 | { | |
415 | struct prefix_ipv6 p; | |
416 | struct route_table *table; | |
417 | struct route_node *rn; | |
418 | struct rib *match; | |
419 | struct nexthop *newhop; | |
420 | ||
421 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
422 | nexthop->ifindex = 0; | |
423 | ||
424 | if (set) | |
425 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
426 | ||
427 | /* Make lookup prefix. */ | |
428 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
429 | p.family = AF_INET6; | |
430 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
431 | p.prefix = nexthop->gate.ipv6; | |
432 | ||
433 | /* Lookup table. */ | |
434 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
435 | if (! table) | |
436 | return 0; | |
437 | ||
438 | rn = route_node_match (table, (struct prefix *) &p); | |
439 | while (rn) | |
440 | { | |
441 | route_unlock_node (rn); | |
442 | ||
a50c107e | 443 | /* If lookup self prefix return immediately. */ |
718e3744 | 444 | if (rn == top) |
445 | return 0; | |
446 | ||
447 | /* Pick up selected route. */ | |
448 | for (match = rn->info; match; match = match->next) | |
16814f96 SH |
449 | { |
450 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
451 | continue; | |
452 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
453 | break; | |
454 | } | |
718e3744 | 455 | |
456 | /* If there is no selected route or matched route is EGP, go up | |
457 | tree. */ | |
458 | if (! match | |
459 | || match->type == ZEBRA_ROUTE_BGP) | |
460 | { | |
461 | do { | |
462 | rn = rn->parent; | |
463 | } while (rn && rn->info == NULL); | |
464 | if (rn) | |
465 | route_lock_node (rn); | |
466 | } | |
467 | else | |
468 | { | |
469 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
470 | { | |
471 | /* Directly point connected route. */ | |
472 | newhop = match->nexthop; | |
473 | ||
474 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
475 | nexthop->ifindex = newhop->ifindex; | |
476 | ||
477 | return 1; | |
478 | } | |
479 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
480 | { | |
481 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
482 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
483 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
484 | { | |
485 | if (set) | |
486 | { | |
487 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
488 | nexthop->rtype = newhop->type; | |
489 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
490 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
491 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
492 | nexthop->rgate.ipv6 = newhop->gate.ipv6; | |
493 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
494 | || newhop->type == NEXTHOP_TYPE_IFNAME | |
495 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
496 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
497 | nexthop->rifindex = newhop->ifindex; | |
498 | } | |
499 | return 1; | |
500 | } | |
501 | return 0; | |
502 | } | |
503 | else | |
504 | { | |
505 | return 0; | |
506 | } | |
507 | } | |
508 | } | |
509 | return 0; | |
510 | } | |
511 | #endif /* HAVE_IPV6 */ | |
512 | ||
513 | struct rib * | |
514 | rib_match_ipv4 (struct in_addr addr) | |
515 | { | |
516 | struct prefix_ipv4 p; | |
517 | struct route_table *table; | |
518 | struct route_node *rn; | |
519 | struct rib *match; | |
520 | struct nexthop *newhop; | |
521 | ||
522 | /* Lookup table. */ | |
523 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
524 | if (! table) | |
525 | return 0; | |
526 | ||
527 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
528 | p.family = AF_INET; | |
529 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
530 | p.prefix = addr; | |
531 | ||
532 | rn = route_node_match (table, (struct prefix *) &p); | |
533 | ||
534 | while (rn) | |
535 | { | |
536 | route_unlock_node (rn); | |
537 | ||
538 | /* Pick up selected route. */ | |
539 | for (match = rn->info; match; match = match->next) | |
16814f96 SH |
540 | { |
541 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
542 | continue; | |
543 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
544 | break; | |
545 | } | |
718e3744 | 546 | |
547 | /* If there is no selected route or matched route is EGP, go up | |
548 | tree. */ | |
549 | if (! match | |
550 | || match->type == ZEBRA_ROUTE_BGP) | |
551 | { | |
552 | do { | |
553 | rn = rn->parent; | |
554 | } while (rn && rn->info == NULL); | |
555 | if (rn) | |
556 | route_lock_node (rn); | |
557 | } | |
558 | else | |
559 | { | |
560 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
561 | /* Directly point connected route. */ | |
562 | return match; | |
563 | else | |
564 | { | |
565 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
566 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
567 | return match; | |
568 | return NULL; | |
569 | } | |
570 | } | |
571 | } | |
572 | return NULL; | |
573 | } | |
574 | ||
575 | struct rib * | |
576 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
577 | { | |
578 | struct route_table *table; | |
579 | struct route_node *rn; | |
580 | struct rib *match; | |
581 | struct nexthop *nexthop; | |
582 | ||
583 | /* Lookup table. */ | |
584 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
585 | if (! table) | |
586 | return 0; | |
587 | ||
588 | rn = route_node_lookup (table, (struct prefix *) p); | |
589 | ||
590 | /* No route for this prefix. */ | |
591 | if (! rn) | |
592 | return NULL; | |
593 | ||
594 | /* Unlock node. */ | |
595 | route_unlock_node (rn); | |
596 | ||
718e3744 | 597 | for (match = rn->info; match; match = match->next) |
16814f96 SH |
598 | { |
599 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
600 | continue; | |
601 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
602 | break; | |
603 | } | |
718e3744 | 604 | |
605 | if (! match || match->type == ZEBRA_ROUTE_BGP) | |
606 | return NULL; | |
607 | ||
608 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
609 | return match; | |
610 | ||
611 | for (nexthop = match->nexthop; nexthop; nexthop = nexthop->next) | |
612 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
613 | return match; | |
614 | ||
615 | return NULL; | |
616 | } | |
617 | ||
dc95824a DO |
618 | /* |
619 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
620 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
621 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
622 | * | |
623 | * Return values: | |
624 | * -1: error | |
625 | * 0: exact match found | |
626 | * 1: a match was found with a different gate | |
627 | * 2: connected route found | |
628 | * 3: no matches found | |
629 | */ | |
630 | int | |
631 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate) | |
632 | { | |
633 | struct route_table *table; | |
634 | struct route_node *rn; | |
635 | struct rib *match; | |
636 | struct nexthop *nexthop; | |
637 | ||
638 | /* Lookup table. */ | |
639 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
640 | if (! table) | |
641 | return ZEBRA_RIB_LOOKUP_ERROR; | |
642 | ||
643 | /* Scan the RIB table for exactly matching RIB entry. */ | |
644 | rn = route_node_lookup (table, (struct prefix *) p); | |
645 | ||
646 | /* No route for this prefix. */ | |
647 | if (! rn) | |
648 | return ZEBRA_RIB_NOTFOUND; | |
649 | ||
650 | /* Unlock node. */ | |
651 | route_unlock_node (rn); | |
652 | ||
653 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
654 | for (match = rn->info; match; match = match->next) | |
16814f96 SH |
655 | { |
656 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
657 | continue; | |
658 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
659 | break; | |
660 | } | |
dc95824a DO |
661 | |
662 | /* None such found :( */ | |
663 | if (!match) | |
664 | return ZEBRA_RIB_NOTFOUND; | |
665 | ||
666 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
667 | return ZEBRA_RIB_FOUND_CONNECTED; | |
668 | ||
669 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
670 | for (nexthop = match->nexthop; nexthop; nexthop = nexthop->next) | |
671 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
672 | { | |
673 | /* We are happy with either direct or recursive hexthop */ | |
674 | if (nexthop->gate.ipv4.s_addr == qgate->sin.sin_addr.s_addr || | |
675 | nexthop->rgate.ipv4.s_addr == qgate->sin.sin_addr.s_addr) | |
676 | return ZEBRA_RIB_FOUND_EXACT; | |
677 | else | |
678 | { | |
679 | if (IS_ZEBRA_DEBUG_RIB) | |
680 | { | |
681 | char gate_buf[INET_ADDRSTRLEN], rgate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
682 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
683 | inet_ntop (AF_INET, &nexthop->rgate.ipv4.s_addr, rgate_buf, INET_ADDRSTRLEN); | |
684 | inet_ntop (AF_INET, &qgate->sin.sin_addr.s_addr, qgate_buf, INET_ADDRSTRLEN); | |
685 | zlog_debug ("%s: qgate == %s, gate == %s, rgate == %s", __func__, qgate_buf, gate_buf, rgate_buf); | |
686 | } | |
687 | return ZEBRA_RIB_FOUND_NOGATE; | |
688 | } | |
689 | } | |
690 | ||
691 | return ZEBRA_RIB_NOTFOUND; | |
692 | } | |
693 | ||
718e3744 | 694 | #ifdef HAVE_IPV6 |
695 | struct rib * | |
696 | rib_match_ipv6 (struct in6_addr *addr) | |
697 | { | |
698 | struct prefix_ipv6 p; | |
699 | struct route_table *table; | |
700 | struct route_node *rn; | |
701 | struct rib *match; | |
702 | struct nexthop *newhop; | |
703 | ||
704 | /* Lookup table. */ | |
705 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
706 | if (! table) | |
707 | return 0; | |
708 | ||
709 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
710 | p.family = AF_INET6; | |
711 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
712 | IPV6_ADDR_COPY (&p.prefix, addr); | |
713 | ||
714 | rn = route_node_match (table, (struct prefix *) &p); | |
715 | ||
716 | while (rn) | |
717 | { | |
718 | route_unlock_node (rn); | |
719 | ||
720 | /* Pick up selected route. */ | |
721 | for (match = rn->info; match; match = match->next) | |
16814f96 SH |
722 | { |
723 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
724 | continue; | |
725 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
726 | break; | |
727 | } | |
718e3744 | 728 | |
729 | /* If there is no selected route or matched route is EGP, go up | |
730 | tree. */ | |
731 | if (! match | |
732 | || match->type == ZEBRA_ROUTE_BGP) | |
733 | { | |
734 | do { | |
735 | rn = rn->parent; | |
736 | } while (rn && rn->info == NULL); | |
737 | if (rn) | |
738 | route_lock_node (rn); | |
739 | } | |
740 | else | |
741 | { | |
742 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
743 | /* Directly point connected route. */ | |
744 | return match; | |
745 | else | |
746 | { | |
747 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
748 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
749 | return match; | |
750 | return NULL; | |
751 | } | |
752 | } | |
753 | } | |
754 | return NULL; | |
755 | } | |
756 | #endif /* HAVE_IPV6 */ | |
757 | ||
7514fb77 PJ |
758 | #define RIB_SYSTEM_ROUTE(R) \ |
759 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
760 | ||
dc95824a DO |
761 | /* This function verifies reachability of one given nexthop, which can be |
762 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
763 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
764 | * nexthop->ifindex will be updated appropriately as well. | |
765 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
766 | * not vice versa. | |
767 | * | |
768 | * The return value is the final value of 'ACTIVE' flag. | |
769 | */ | |
770 | ||
d02c56cd | 771 | static unsigned |
718e3744 | 772 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
773 | struct nexthop *nexthop, int set) | |
774 | { | |
775 | struct interface *ifp; | |
7514fb77 PJ |
776 | route_map_result_t ret = RMAP_MATCH; |
777 | extern char *proto_rm[AFI_MAX][ZEBRA_ROUTE_MAX+1]; | |
778 | struct route_map *rmap; | |
779 | int family; | |
718e3744 | 780 | |
7514fb77 | 781 | family = 0; |
718e3744 | 782 | switch (nexthop->type) |
783 | { | |
784 | case NEXTHOP_TYPE_IFINDEX: | |
785 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 786 | if (ifp && if_is_operative(ifp)) |
718e3744 | 787 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
788 | else | |
789 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
790 | break; | |
718e3744 | 791 | case NEXTHOP_TYPE_IPV6_IFNAME: |
7514fb77 PJ |
792 | family = AFI_IP6; |
793 | case NEXTHOP_TYPE_IFNAME: | |
718e3744 | 794 | ifp = if_lookup_by_name (nexthop->ifname); |
3f087670 | 795 | if (ifp && if_is_operative(ifp)) |
718e3744 | 796 | { |
797 | if (set) | |
798 | nexthop->ifindex = ifp->ifindex; | |
799 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
800 | } | |
801 | else | |
802 | { | |
803 | if (set) | |
804 | nexthop->ifindex = 0; | |
805 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
806 | } | |
807 | break; | |
808 | case NEXTHOP_TYPE_IPV4: | |
809 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 810 | family = AFI_IP; |
718e3744 | 811 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
812 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
813 | else | |
814 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
815 | break; | |
816 | #ifdef HAVE_IPV6 | |
817 | case NEXTHOP_TYPE_IPV6: | |
7514fb77 | 818 | family = AFI_IP6; |
718e3744 | 819 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
820 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
821 | else | |
822 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
823 | break; | |
824 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
7514fb77 | 825 | family = AFI_IP6; |
718e3744 | 826 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
827 | { | |
828 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 829 | if (ifp && if_is_operative(ifp)) |
718e3744 | 830 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
831 | else | |
832 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
833 | } | |
834 | else | |
835 | { | |
836 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
837 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
838 | else | |
839 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
840 | } | |
841 | break; | |
842 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 843 | case NEXTHOP_TYPE_BLACKHOLE: |
844 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
845 | break; | |
718e3744 | 846 | default: |
847 | break; | |
848 | } | |
7514fb77 PJ |
849 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
850 | return 0; | |
851 | ||
852 | if (RIB_SYSTEM_ROUTE(rib) || | |
853 | (family == AFI_IP && rn->p.family != AF_INET) || | |
854 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
855 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
856 | ||
857 | rmap = 0; | |
858 | if (rib->type >= 0 && rib->type < ZEBRA_ROUTE_MAX && | |
859 | proto_rm[family][rib->type]) | |
860 | rmap = route_map_lookup_by_name (proto_rm[family][rib->type]); | |
861 | if (!rmap && proto_rm[family][ZEBRA_ROUTE_MAX]) | |
862 | rmap = route_map_lookup_by_name (proto_rm[family][ZEBRA_ROUTE_MAX]); | |
863 | if (rmap) { | |
864 | ret = route_map_apply(rmap, &rn->p, RMAP_ZEBRA, nexthop); | |
865 | } | |
866 | ||
867 | if (ret == RMAP_DENYMATCH) | |
868 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
718e3744 | 869 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
870 | } | |
871 | ||
03e232a4 DO |
872 | /* Iterate over all nexthops of the given RIB entry and refresh their |
873 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
874 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
875 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
876 | * transparently passed to nexthop_active_check(). | |
877 | * | |
878 | * Return value is the new number of active nexthops. | |
879 | */ | |
880 | ||
a1ac18c4 | 881 | static int |
718e3744 | 882 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
883 | { | |
884 | struct nexthop *nexthop; | |
d02c56cd | 885 | unsigned int prev_active, prev_index, new_active; |
718e3744 | 886 | |
887 | rib->nexthop_active_num = 0; | |
888 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
889 | ||
890 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 DO |
891 | { |
892 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3a56063 | 893 | prev_index = nexthop->ifindex; |
03e232a4 DO |
894 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
895 | rib->nexthop_active_num++; | |
c3a56063 JT |
896 | if (prev_active != new_active || |
897 | prev_index != nexthop->ifindex) | |
03e232a4 DO |
898 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); |
899 | } | |
718e3744 | 900 | return rib->nexthop_active_num; |
901 | } | |
6baeb988 | 902 | |
718e3744 | 903 | \f |
718e3744 | 904 | |
a1ac18c4 | 905 | static void |
718e3744 | 906 | rib_install_kernel (struct route_node *rn, struct rib *rib) |
907 | { | |
908 | int ret = 0; | |
909 | struct nexthop *nexthop; | |
910 | ||
911 | switch (PREFIX_FAMILY (&rn->p)) | |
912 | { | |
913 | case AF_INET: | |
914 | ret = kernel_add_ipv4 (&rn->p, rib); | |
915 | break; | |
916 | #ifdef HAVE_IPV6 | |
917 | case AF_INET6: | |
918 | ret = kernel_add_ipv6 (&rn->p, rib); | |
919 | break; | |
920 | #endif /* HAVE_IPV6 */ | |
921 | } | |
922 | ||
dc95824a | 923 | /* This condition is never met, if we are using rt_socket.c */ |
718e3744 | 924 | if (ret < 0) |
925 | { | |
926 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
927 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
928 | } | |
929 | } | |
930 | ||
931 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 932 | static int |
718e3744 | 933 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
934 | { | |
935 | int ret = 0; | |
936 | struct nexthop *nexthop; | |
937 | ||
938 | switch (PREFIX_FAMILY (&rn->p)) | |
939 | { | |
940 | case AF_INET: | |
941 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
942 | break; | |
943 | #ifdef HAVE_IPV6 | |
944 | case AF_INET6: | |
945 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
946 | break; | |
947 | #endif /* HAVE_IPV6 */ | |
948 | } | |
949 | ||
950 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
951 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
952 | ||
953 | return ret; | |
954 | } | |
955 | ||
956 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 957 | static void |
718e3744 | 958 | rib_uninstall (struct route_node *rn, struct rib *rib) |
959 | { | |
960 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
961 | { | |
962 | redistribute_delete (&rn->p, rib); | |
963 | if (! RIB_SYSTEM_ROUTE (rib)) | |
964 | rib_uninstall_kernel (rn, rib); | |
965 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
966 | } | |
967 | } | |
968 | ||
6d691129 PJ |
969 | static void rib_unlink (struct route_node *, struct rib *); |
970 | ||
718e3744 | 971 | /* Core function for processing routing information base. */ |
e96f9203 DO |
972 | static void |
973 | rib_process (struct route_node *rn) | |
718e3744 | 974 | { |
975 | struct rib *rib; | |
976 | struct rib *next; | |
977 | struct rib *fib = NULL; | |
978 | struct rib *select = NULL; | |
6d691129 | 979 | struct rib *del = NULL; |
d753e9ee | 980 | int installed = 0; |
981 | struct nexthop *nexthop = NULL; | |
f304cb48 | 982 | char buf[INET6_ADDRSTRLEN]; |
4d38fdb4 | 983 | |
984 | assert (rn); | |
985 | ||
93bdadae | 986 | if (IS_ZEBRA_DEBUG_RIB || IS_ZEBRA_DEBUG_RIB_Q) |
f304cb48 | 987 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 988 | |
718e3744 | 989 | for (rib = rn->info; rib; rib = next) |
990 | { | |
dc95824a DO |
991 | /* The next pointer is saved, because current pointer |
992 | * may be passed to rib_unlink() in the middle of iteration. | |
993 | */ | |
718e3744 | 994 | next = rib->next; |
d753e9ee | 995 | |
718e3744 | 996 | /* Currently installed rib. */ |
997 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
998 | { |
999 | assert (fib == NULL); | |
1000 | fib = rib; | |
1001 | } | |
1002 | ||
1003 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, | |
1004 | * which we need to do do further work with below. | |
1005 | */ | |
1006 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1007 | { | |
1008 | if (rib != fib) | |
1009 | { | |
1010 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1011 | zlog_debug ("%s: %s/%d: rn %p, removing rib %p", __func__, |
1012 | buf, rn->p.prefixlen, rn, rib); | |
6d691129 PJ |
1013 | rib_unlink (rn, rib); |
1014 | } | |
1015 | else | |
1016 | del = rib; | |
1017 | ||
1018 | continue; | |
1019 | } | |
4d38fdb4 | 1020 | |
718e3744 | 1021 | /* Skip unreachable nexthop. */ |
1022 | if (! nexthop_active_update (rn, rib, 0)) | |
7021c425 | 1023 | continue; |
718e3744 | 1024 | |
1025 | /* Infinit distance. */ | |
1026 | if (rib->distance == DISTANCE_INFINITY) | |
7021c425 | 1027 | continue; |
718e3744 | 1028 | |
af887b51 | 1029 | /* Newly selected rib, the common case. */ |
1030 | if (!select) | |
1031 | { | |
1032 | select = rib; | |
1033 | continue; | |
1034 | } | |
1035 | ||
1036 | /* filter route selection in following order: | |
af887b51 | 1037 | * - connected beats other types |
a8d9c1f9 | 1038 | * - lower distance beats higher |
af887b51 | 1039 | * - lower metric beats higher for equal distance |
1040 | * - last, hence oldest, route wins tie break. | |
1041 | */ | |
a1038a15 | 1042 | |
1043 | /* Connected routes. Pick the last connected | |
1044 | * route of the set of lowest metric connected routes. | |
1045 | */ | |
a8d9c1f9 | 1046 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1047 | { | |
a1038a15 | 1048 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1049 | || rib->metric <= select->metric) |
a1038a15 | 1050 | select = rib; |
1051 | continue; | |
a8d9c1f9 | 1052 | } |
1053 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
1054 | continue; | |
1055 | ||
1056 | /* higher distance loses */ | |
1057 | if (rib->distance > select->distance) | |
1058 | continue; | |
1059 | ||
1060 | /* lower wins */ | |
1061 | if (rib->distance < select->distance) | |
1062 | { | |
af887b51 | 1063 | select = rib; |
a8d9c1f9 | 1064 | continue; |
1065 | } | |
1066 | ||
1067 | /* metric tie-breaks equal distance */ | |
1068 | if (rib->metric <= select->metric) | |
1069 | select = rib; | |
dc95824a DO |
1070 | } /* for (rib = rn->info; rib; rib = next) */ |
1071 | ||
1072 | /* After the cycle is finished, the following pointers will be set: | |
1073 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1074 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1075 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1076 | * rib --- NULL | |
1077 | */ | |
1078 | ||
1079 | /* Same RIB entry is selected. Update FIB and finish. */ | |
718e3744 | 1080 | if (select && select == fib) |
1081 | { | |
6d691129 | 1082 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1083 | zlog_debug ("%s: %s/%d: Updating existing route, select %p, fib %p", |
1084 | __func__, buf, rn->p.prefixlen, select, fib); | |
718e3744 | 1085 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1086 | { |
1087 | redistribute_delete (&rn->p, select); | |
1088 | if (! RIB_SYSTEM_ROUTE (select)) | |
1089 | rib_uninstall_kernel (rn, select); | |
718e3744 | 1090 | |
4d38fdb4 | 1091 | /* Set real nexthop. */ |
1092 | nexthop_active_update (rn, select, 1); | |
718e3744 | 1093 | |
4d38fdb4 | 1094 | if (! RIB_SYSTEM_ROUTE (select)) |
1095 | rib_install_kernel (rn, select); | |
1096 | redistribute_add (&rn->p, select); | |
1097 | } | |
d753e9ee | 1098 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1099 | { |
1100 | /* Housekeeping code to deal with | |
1101 | race conditions in kernel with linux | |
1102 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1103 | is ready to add routes. | |
1104 | This makes sure the routes are IN the kernel. | |
1105 | */ | |
1106 | ||
1107 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) | |
a3aaf5b0 | 1108 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1109 | { |
a3aaf5b0 DO |
1110 | installed = 1; |
1111 | break; | |
4d38fdb4 | 1112 | } |
1113 | if (! installed) | |
1114 | rib_install_kernel (rn, select); | |
1115 | } | |
6d691129 | 1116 | goto end; |
718e3744 | 1117 | } |
1118 | ||
dc95824a DO |
1119 | /* At this point we either haven't found the best RIB entry or it is |
1120 | * different from what we currently intend to flag with SELECTED. In both | |
1121 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1122 | */ | |
718e3744 | 1123 | if (fib) |
1124 | { | |
6d691129 | 1125 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1126 | zlog_debug ("%s: %s/%d: Removing existing route, fib %p", __func__, |
1127 | buf, rn->p.prefixlen, fib); | |
718e3744 | 1128 | redistribute_delete (&rn->p, fib); |
1129 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1130 | rib_uninstall_kernel (rn, fib); | |
1131 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1132 | ||
1133 | /* Set real nexthop. */ | |
1134 | nexthop_active_update (rn, fib, 1); | |
1135 | } | |
1136 | ||
dc95824a DO |
1137 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1138 | * tell, that if a new winner exists, FIB is still not updated with this | |
1139 | * data, but ready to be. | |
1140 | */ | |
718e3744 | 1141 | if (select) |
1142 | { | |
6d691129 | 1143 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1144 | zlog_debug ("%s: %s/%d: Adding route, select %p", __func__, buf, |
1145 | rn->p.prefixlen, select); | |
718e3744 | 1146 | /* Set real nexthop. */ |
1147 | nexthop_active_update (rn, select, 1); | |
1148 | ||
1149 | if (! RIB_SYSTEM_ROUTE (select)) | |
4d38fdb4 | 1150 | rib_install_kernel (rn, select); |
718e3744 | 1151 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1152 | redistribute_add (&rn->p, select); | |
1153 | } | |
4d38fdb4 | 1154 | |
6d691129 PJ |
1155 | /* FIB route was removed, should be deleted */ |
1156 | if (del) | |
1157 | { | |
1158 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1159 | zlog_debug ("%s: %s/%d: Deleting fib %p, rn %p", __func__, buf, |
1160 | rn->p.prefixlen, del, rn); | |
6d691129 PJ |
1161 | rib_unlink (rn, del); |
1162 | } | |
4d38fdb4 | 1163 | |
6d691129 PJ |
1164 | end: |
1165 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
93bdadae | 1166 | zlog_debug ("%s: %s/%d: rn %p dequeued", __func__, buf, rn->p.prefixlen, rn); |
e96f9203 DO |
1167 | } |
1168 | ||
5110a0c6 SH |
1169 | /* Take a list of route_node structs and return 1, if there was a record |
1170 | * picked from it and processed by rib_process(). Don't process more, | |
1171 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1172 | */ |
ef9b113e | 1173 | static unsigned int |
e96f9203 DO |
1174 | process_subq (struct list * subq, u_char qindex) |
1175 | { | |
5110a0c6 | 1176 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1177 | struct route_node *rnode; |
5110a0c6 SH |
1178 | |
1179 | if (!lnode) | |
e96f9203 | 1180 | return 0; |
5110a0c6 | 1181 | |
e96f9203 DO |
1182 | rnode = listgetdata (lnode); |
1183 | rib_process (rnode); | |
5110a0c6 | 1184 | |
e96f9203 DO |
1185 | if (rnode->info) /* The first RIB record is holding the flags bitmask. */ |
1186 | UNSET_FLAG (((struct rib *)rnode->info)->rn_status, RIB_ROUTE_QUEUED(qindex)); | |
67b9467f | 1187 | #if 0 |
5110a0c6 SH |
1188 | else |
1189 | { | |
1190 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1191 | __func__, rnode, rnode->lock); | |
1192 | zlog_backtrace(LOG_DEBUG); | |
1193 | } | |
67b9467f | 1194 | #endif |
e96f9203 DO |
1195 | route_unlock_node (rnode); |
1196 | list_delete_node (subq, lnode); | |
1197 | return 1; | |
1198 | } | |
1199 | ||
1200 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from | |
1201 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1202 | * is pointed to the meta queue structure. | |
1203 | */ | |
1204 | static wq_item_status | |
1205 | meta_queue_process (struct work_queue *dummy, void *data) | |
1206 | { | |
1207 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1208 | unsigned i; |
1209 | ||
e96f9203 DO |
1210 | for (i = 0; i < MQ_SIZE; i++) |
1211 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1212 | { |
1213 | mq->size--; | |
1214 | break; | |
1215 | } | |
e96f9203 DO |
1216 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1217 | } | |
1218 | ||
5110a0c6 SH |
1219 | /* Map from rib types to queue type (priority) in meta queue */ |
1220 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { | |
1221 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1222 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1223 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1224 | [ZEBRA_ROUTE_STATIC] = 1, | |
1225 | [ZEBRA_ROUTE_RIP] = 2, | |
1226 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1227 | [ZEBRA_ROUTE_OSPF] = 2, | |
1228 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1229 | [ZEBRA_ROUTE_ISIS] = 2, | |
1230 | [ZEBRA_ROUTE_BGP] = 3, | |
1231 | [ZEBRA_ROUTE_HSLS] = 4, | |
1232 | }; | |
1233 | ||
1234 | /* Look into the RN and queue it into one or more priority queues, | |
1235 | * increasing the size for each data push done. | |
e96f9203 | 1236 | */ |
ef9b113e SH |
1237 | static void |
1238 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1239 | { |
e96f9203 DO |
1240 | struct rib *rib; |
1241 | char buf[INET6_ADDRSTRLEN]; | |
5110a0c6 | 1242 | |
e96f9203 DO |
1243 | if (IS_ZEBRA_DEBUG_RIB_Q) |
1244 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
5110a0c6 | 1245 | |
e96f9203 | 1246 | for (rib = rn->info; rib; rib = rib->next) |
e96f9203 | 1247 | { |
5110a0c6 SH |
1248 | u_char qindex = meta_queue_map[rib->type]; |
1249 | ||
1250 | /* Invariant: at this point we always have rn->info set. */ | |
1251 | if (CHECK_FLAG (((struct rib *)rn->info)->rn_status, RIB_ROUTE_QUEUED(qindex))) | |
1252 | { | |
1253 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1254 | zlog_debug ("%s: %s/%d: rn %p is already queued in sub-queue %u", | |
1255 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
1256 | continue; | |
1257 | } | |
1258 | ||
1259 | SET_FLAG (((struct rib *)rn->info)->rn_status, RIB_ROUTE_QUEUED(qindex)); | |
1260 | listnode_add (mq->subq[qindex], rn); | |
1261 | route_lock_node (rn); | |
1262 | mq->size++; | |
1263 | ||
e96f9203 | 1264 | if (IS_ZEBRA_DEBUG_RIB_Q) |
5110a0c6 SH |
1265 | zlog_debug ("%s: %s/%d: queued rn %p into sub-queue %u", |
1266 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
e96f9203 | 1267 | } |
4d38fdb4 | 1268 | } |
1269 | ||
6d691129 | 1270 | /* Add route_node to work queue and schedule processing */ |
a1ac18c4 | 1271 | static void |
6d691129 | 1272 | rib_queue_add (struct zebra_t *zebra, struct route_node *rn) |
4d38fdb4 | 1273 | { |
4d38fdb4 | 1274 | |
93bdadae | 1275 | if (IS_ZEBRA_DEBUG_RIB_Q) |
6d691129 | 1276 | { |
cc2dd928 | 1277 | char buf[INET6_ADDRSTRLEN]; |
4d38fdb4 | 1278 | |
cc2dd928 SH |
1279 | zlog_info ("%s: %s/%d: work queue added", __func__, |
1280 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN), | |
1281 | rn->p.prefixlen); | |
4d38fdb4 | 1282 | } |
4d38fdb4 | 1283 | |
cc2dd928 SH |
1284 | /* |
1285 | * The RIB queue should normally be either empty or holding the only | |
1286 | * work_queue_item element. In the latter case this element would | |
1287 | * hold a pointer to the meta queue structure, which must be used to | |
1288 | * actually queue the route nodes to process. So create the MQ | |
1289 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1290 | * This semantics was introduced after 0.99.9 release. |
1291 | */ | |
e96f9203 DO |
1292 | if (!zebra->ribq->items->count) |
1293 | work_queue_add (zebra->ribq, zebra->mq); | |
1294 | ||
1295 | rib_meta_queue_add (zebra->mq, rn); | |
4d38fdb4 | 1296 | } |
1297 | ||
5110a0c6 SH |
1298 | /* Create new meta queue. |
1299 | A destructor function doesn't seem to be necessary here. | |
1300 | */ | |
ef9b113e SH |
1301 | static struct meta_queue * |
1302 | meta_queue_new (void) | |
e96f9203 DO |
1303 | { |
1304 | struct meta_queue *new; | |
5110a0c6 SH |
1305 | unsigned i; |
1306 | ||
1307 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1308 | assert(new); | |
e96f9203 | 1309 | |
e96f9203 | 1310 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1311 | { |
1312 | new->subq[i] = list_new (); | |
1313 | assert(new->subq[i]); | |
1314 | } | |
1315 | ||
e96f9203 DO |
1316 | return new; |
1317 | } | |
1318 | ||
4d38fdb4 | 1319 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1320 | static void |
4d38fdb4 | 1321 | rib_queue_init (struct zebra_t *zebra) |
1322 | { | |
4d38fdb4 | 1323 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 1324 | "route_node processing"))) |
4d38fdb4 | 1325 | { |
6d691129 | 1326 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 1327 | return; |
1328 | } | |
1329 | ||
1330 | /* fill in the work queue spec */ | |
e96f9203 | 1331 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 1332 | zebra->ribq->spec.errorfunc = NULL; |
4d38fdb4 | 1333 | /* XXX: TODO: These should be runtime configurable via vty */ |
1334 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 1335 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 1336 | |
e96f9203 | 1337 | if (!(zebra->mq = meta_queue_new ())) |
e96f9203 | 1338 | zlog_err ("%s: could not initialise meta queue!", __func__); |
718e3744 | 1339 | } |
1340 | ||
6d691129 PJ |
1341 | /* RIB updates are processed via a queue of pointers to route_nodes. |
1342 | * | |
1343 | * The queue length is bounded by the maximal size of the routing table, | |
1344 | * as a route_node will not be requeued, if already queued. | |
1345 | * | |
3c0755dc PJ |
1346 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
1347 | * state, or static_install_ipv{4,6} (when an existing RIB is updated) | |
1348 | * and then submit route_node to queue for best-path selection later. | |
1349 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
1350 | * |
1351 | * Deleted RIBs are reaped during best-path selection. | |
1352 | * | |
1353 | * rib_addnode | |
1354 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
1355 | * |-------->| | best RIB, if required |
1356 | * | | | |
1357 | * static_install->|->rib_addqueue...... -> rib_process | |
1358 | * | | | |
1359 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
1360 | * |-> set RIB_ENTRY_REMOVE | |
1361 | * rib_delnode (RIB freed) | |
1362 | * | |
1363 | * | |
1364 | * Queueing state for a route_node is kept in the head RIB entry, this | |
1365 | * state must be preserved as and when the head RIB entry of a | |
1366 | * route_node is changed by rib_unlink / rib_link. A small complication, | |
1367 | * but saves having to allocate a dedicated object for this. | |
1368 | * | |
1369 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
1370 | * | |
1371 | * - route_nodes: refcounted by: | |
1372 | * - RIBs attached to route_node: | |
1373 | * - managed by: rib_link/unlink | |
1374 | * - route_node processing queue | |
1375 | * - managed by: rib_addqueue, rib_process. | |
1376 | * | |
1377 | */ | |
1378 | ||
718e3744 | 1379 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 1380 | static void |
6d691129 | 1381 | rib_link (struct route_node *rn, struct rib *rib) |
718e3744 | 1382 | { |
1383 | struct rib *head; | |
f304cb48 | 1384 | char buf[INET6_ADDRSTRLEN]; |
4d38fdb4 | 1385 | |
1386 | assert (rib && rn); | |
1387 | ||
6d691129 PJ |
1388 | route_lock_node (rn); /* rn route table reference */ |
1389 | ||
1390 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1391 | { |
f304cb48 | 1392 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
1393 | zlog_debug ("%s: %s/%d: rn %p, rib %p", __func__, |
1394 | buf, rn->p.prefixlen, rn, rib); | |
1395 | } | |
6d691129 | 1396 | |
718e3744 | 1397 | head = rn->info; |
1398 | if (head) | |
6d691129 PJ |
1399 | { |
1400 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1401 | zlog_debug ("%s: %s/%d: new head, rn_status copied over", __func__, |
1402 | buf, rn->p.prefixlen); | |
6d691129 PJ |
1403 | head->prev = rib; |
1404 | /* Transfer the rn status flags to the new head RIB */ | |
1405 | rib->rn_status = head->rn_status; | |
1406 | } | |
718e3744 | 1407 | rib->next = head; |
1408 | rn->info = rib; | |
6d691129 | 1409 | rib_queue_add (&zebrad, rn); |
718e3744 | 1410 | } |
1411 | ||
a1ac18c4 | 1412 | static void |
6d691129 | 1413 | rib_addnode (struct route_node *rn, struct rib *rib) |
718e3744 | 1414 | { |
6d691129 PJ |
1415 | /* RIB node has been un-removed before route-node is processed. |
1416 | * route_node must hence already be on the queue for processing.. | |
1417 | */ | |
1418 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1419 | { | |
1420 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1421 | { |
f304cb48 DO |
1422 | char buf[INET6_ADDRSTRLEN]; |
1423 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
1424 | zlog_debug ("%s: %s/%d: rn %p, un-removed rib %p", |
1425 | __func__, buf, rn->p.prefixlen, rn, rib); | |
1426 | } | |
6d691129 PJ |
1427 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
1428 | return; | |
1429 | } | |
1430 | rib_link (rn, rib); | |
1431 | } | |
1432 | ||
1433 | static void | |
1434 | rib_unlink (struct route_node *rn, struct rib *rib) | |
1435 | { | |
1436 | struct nexthop *nexthop, *next; | |
f304cb48 | 1437 | char buf[INET6_ADDRSTRLEN]; |
6d691129 | 1438 | |
4d38fdb4 | 1439 | assert (rn && rib); |
6d691129 PJ |
1440 | |
1441 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1442 | { |
f304cb48 | 1443 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
1444 | zlog_debug ("%s: %s/%d: rn %p, rib %p", |
1445 | __func__, buf, rn->p.prefixlen, rn, rib); | |
1446 | } | |
6d691129 | 1447 | |
718e3744 | 1448 | if (rib->next) |
1449 | rib->next->prev = rib->prev; | |
6d691129 | 1450 | |
718e3744 | 1451 | if (rib->prev) |
1452 | rib->prev->next = rib->next; | |
1453 | else | |
6d691129 PJ |
1454 | { |
1455 | rn->info = rib->next; | |
1456 | ||
1457 | if (rn->info) | |
1458 | { | |
1459 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1460 | zlog_debug ("%s: %s/%d: rn %p, rib %p, new head copy", |
1461 | __func__, buf, rn->p.prefixlen, rn, rib); | |
6d691129 PJ |
1462 | rib->next->rn_status = rib->rn_status; |
1463 | } | |
1464 | } | |
1465 | ||
1466 | /* free RIB and nexthops */ | |
1467 | for (nexthop = rib->nexthop; nexthop; nexthop = next) | |
1468 | { | |
1469 | next = nexthop->next; | |
1470 | nexthop_free (nexthop); | |
1471 | } | |
1472 | XFREE (MTYPE_RIB, rib); | |
1473 | ||
1474 | route_unlock_node (rn); /* rn route table reference */ | |
1475 | } | |
1476 | ||
1477 | static void | |
1478 | rib_delnode (struct route_node *rn, struct rib *rib) | |
1479 | { | |
1480 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1481 | { |
f304cb48 DO |
1482 | char buf[INET6_ADDRSTRLEN]; |
1483 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
1484 | zlog_debug ("%s: %s/%d: rn %p, rib %p, removing", __func__, |
1485 | buf, rn->p.prefixlen, rn, rib); | |
1486 | } | |
6d691129 PJ |
1487 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
1488 | rib_queue_add (&zebrad, rn); | |
718e3744 | 1489 | } |
1490 | ||
1491 | int | |
1492 | rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, | |
7514fb77 PJ |
1493 | struct in_addr *gate, struct in_addr *src, |
1494 | unsigned int ifindex, u_int32_t vrf_id, | |
718e3744 | 1495 | u_int32_t metric, u_char distance) |
1496 | { | |
1497 | struct rib *rib; | |
1498 | struct rib *same = NULL; | |
1499 | struct route_table *table; | |
1500 | struct route_node *rn; | |
1501 | struct nexthop *nexthop; | |
1502 | ||
1503 | /* Lookup table. */ | |
1504 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1505 | if (! table) | |
1506 | return 0; | |
1507 | ||
1508 | /* Make it sure prefixlen is applied to the prefix. */ | |
1509 | apply_mask_ipv4 (p); | |
1510 | ||
1511 | /* Set default distance by route type. */ | |
1512 | if (distance == 0) | |
1513 | { | |
1514 | distance = route_info[type].distance; | |
1515 | ||
1516 | /* iBGP distance is 200. */ | |
1517 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
1518 | distance = 200; | |
1519 | } | |
1520 | ||
1521 | /* Lookup route node.*/ | |
1522 | rn = route_node_get (table, (struct prefix *) p); | |
1523 | ||
1524 | /* If same type of route are installed, treat it as a implicit | |
1525 | withdraw. */ | |
1526 | for (rib = rn->info; rib; rib = rib->next) | |
1527 | { | |
6d691129 PJ |
1528 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
1529 | continue; | |
1530 | ||
ebf1ead0 | 1531 | if (rib->type != type) |
1532 | continue; | |
1533 | if (rib->type != ZEBRA_ROUTE_CONNECT) | |
4d38fdb4 | 1534 | { |
1535 | same = rib; | |
1536 | break; | |
1537 | } | |
ebf1ead0 | 1538 | /* Duplicate connected route comes in. */ |
1539 | else if ((nexthop = rib->nexthop) && | |
1540 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
1541 | nexthop->ifindex == ifindex && |
1542 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 1543 | { |
1544 | rib->refcnt++; | |
1545 | return 0 ; | |
1546 | } | |
718e3744 | 1547 | } |
1548 | ||
1549 | /* Allocate new rib structure. */ | |
4d38fdb4 | 1550 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 1551 | rib->type = type; |
1552 | rib->distance = distance; | |
1553 | rib->flags = flags; | |
1554 | rib->metric = metric; | |
b5f45021 | 1555 | rib->table = vrf_id; |
718e3744 | 1556 | rib->nexthop_num = 0; |
1557 | rib->uptime = time (NULL); | |
1558 | ||
1559 | /* Nexthop settings. */ | |
1560 | if (gate) | |
1561 | { | |
1562 | if (ifindex) | |
7514fb77 | 1563 | nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 1564 | else |
7514fb77 | 1565 | nexthop_ipv4_add (rib, gate, src); |
718e3744 | 1566 | } |
1567 | else | |
1568 | nexthop_ifindex_add (rib, ifindex); | |
1569 | ||
1570 | /* If this route is kernel route, set FIB flag to the route. */ | |
1571 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
1572 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1573 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1574 | ||
1575 | /* Link new rib to node.*/ | |
dc95824a DO |
1576 | if (IS_ZEBRA_DEBUG_RIB) |
1577 | zlog_debug ("%s: calling rib_addnode (%p, %p)", __func__, rn, rib); | |
718e3744 | 1578 | rib_addnode (rn, rib); |
4d38fdb4 | 1579 | |
718e3744 | 1580 | /* Free implicit route.*/ |
1581 | if (same) | |
dc95824a DO |
1582 | { |
1583 | if (IS_ZEBRA_DEBUG_RIB) | |
1584 | zlog_debug ("%s: calling rib_delnode (%p, %p)", __func__, rn, rib); | |
4d38fdb4 | 1585 | rib_delnode (rn, same); |
dc95824a | 1586 | } |
4d38fdb4 | 1587 | |
1588 | route_unlock_node (rn); | |
718e3744 | 1589 | return 0; |
1590 | } | |
1591 | ||
dc95824a DO |
1592 | /* This function dumps the contents of a given RIB entry into |
1593 | * standard debug log. Calling function name and IP prefix in | |
1594 | * question are passed as 1st and 2nd arguments. | |
1595 | */ | |
1596 | ||
1597 | void rib_dump (const char * func, const struct prefix_ipv4 * p, const struct rib * rib) | |
1598 | { | |
1599 | char straddr1[INET_ADDRSTRLEN], straddr2[INET_ADDRSTRLEN]; | |
1600 | struct nexthop *nexthop; | |
1601 | ||
1602 | inet_ntop (AF_INET, &p->prefix, straddr1, INET_ADDRSTRLEN); | |
1603 | zlog_debug ("%s: dumping RIB entry %p for %s/%d", func, rib, straddr1, p->prefixlen); | |
1604 | zlog_debug | |
1605 | ( | |
d02c56cd | 1606 | "%s: refcnt == %lu, uptime == %lu, type == %u, table == %d", |
dc95824a DO |
1607 | func, |
1608 | rib->refcnt, | |
d02c56cd | 1609 | (unsigned long) rib->uptime, |
dc95824a DO |
1610 | rib->type, |
1611 | rib->table | |
1612 | ); | |
1613 | zlog_debug | |
1614 | ( | |
1615 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
1616 | func, | |
1617 | rib->metric, | |
1618 | rib->distance, | |
1619 | rib->flags, | |
1620 | rib->status | |
1621 | ); | |
1622 | zlog_debug | |
1623 | ( | |
1624 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
1625 | func, | |
1626 | rib->nexthop_num, | |
1627 | rib->nexthop_active_num, | |
1628 | rib->nexthop_fib_num | |
1629 | ); | |
1630 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1631 | { | |
1632 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, straddr1, INET_ADDRSTRLEN); | |
1633 | inet_ntop (AF_INET, &nexthop->rgate.ipv4.s_addr, straddr2, INET_ADDRSTRLEN); | |
1634 | zlog_debug | |
1635 | ( | |
1636 | "%s: NH %s (%s) with flags %s%s%s", | |
1637 | func, | |
1638 | straddr1, | |
1639 | straddr2, | |
1640 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
1641 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
1642 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
1643 | ); | |
1644 | } | |
1645 | zlog_debug ("%s: dump complete", func); | |
1646 | } | |
1647 | ||
1648 | /* This is an exported helper to rtm_read() to dump the strange | |
1649 | * RIB entry found by rib_lookup_ipv4_route() | |
1650 | */ | |
1651 | ||
1652 | void rib_lookup_and_dump (struct prefix_ipv4 * p) | |
1653 | { | |
1654 | struct route_table *table; | |
1655 | struct route_node *rn; | |
1656 | struct rib *rib; | |
1657 | char prefix_buf[INET_ADDRSTRLEN]; | |
1658 | ||
1659 | /* Lookup table. */ | |
1660 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1661 | if (! table) | |
1662 | { | |
1663 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
1664 | return; | |
1665 | } | |
1666 | ||
1667 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
1668 | /* Scan the RIB table for exactly matching RIB entry. */ | |
1669 | rn = route_node_lookup (table, (struct prefix *) p); | |
1670 | ||
1671 | /* No route for this prefix. */ | |
1672 | if (! rn) | |
1673 | { | |
1674 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
1675 | return; | |
1676 | } | |
1677 | ||
1678 | /* Unlock node. */ | |
1679 | route_unlock_node (rn); | |
1680 | ||
1681 | /* let's go */ | |
1682 | for (rib = rn->info; rib; rib = rib->next) | |
1683 | { | |
1684 | zlog_debug | |
1685 | ( | |
1686 | "%s: rn %p, rib %p: %s, %s", | |
1687 | __func__, | |
1688 | rn, | |
1689 | rib, | |
1690 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
1691 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
1692 | ); | |
1693 | rib_dump (__func__, p, rib); | |
1694 | } | |
1695 | } | |
1696 | ||
20e5ff0a DO |
1697 | /* Check if requested address assignment will fail due to another |
1698 | * route being installed by zebra in FIB already. Take necessary | |
1699 | * actions, if needed: remove such a route from FIB and deSELECT | |
1700 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
1701 | */ | |
1702 | void rib_lookup_and_pushup (struct prefix_ipv4 * p) | |
1703 | { | |
1704 | struct route_table *table; | |
1705 | struct route_node *rn; | |
1706 | struct rib *rib; | |
1707 | unsigned changed = 0; | |
1708 | ||
1709 | if (NULL == (table = vrf_table (AFI_IP, SAFI_UNICAST, 0))) | |
1710 | { | |
1711 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
1712 | return; | |
1713 | } | |
1714 | ||
1715 | /* No matches would be the simplest case. */ | |
1716 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
1717 | return; | |
1718 | ||
1719 | /* Unlock node. */ | |
1720 | route_unlock_node (rn); | |
1721 | ||
1722 | /* Check all RIB entries. In case any changes have to be done, requeue | |
1723 | * the RN into RIBQ head. If the routing message about the new connected | |
1724 | * route (generated by the IP address we are going to assign very soon) | |
1725 | * comes before the RIBQ is processed, the new RIB entry will join | |
1726 | * RIBQ record already on head. This is necessary for proper revalidation | |
1727 | * of the rest of the RIB. | |
1728 | */ | |
1729 | for (rib = rn->info; rib; rib = rib->next) | |
1730 | { | |
1731 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
1732 | ! RIB_SYSTEM_ROUTE (rib)) | |
1733 | { | |
1734 | changed = 1; | |
1735 | if (IS_ZEBRA_DEBUG_RIB) | |
1736 | { | |
1737 | char buf[INET_ADDRSTRLEN]; | |
1738 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
1739 | zlog_debug ("%s: freeing way for connected prefix %s/%d", __func__, buf, p->prefixlen); | |
1740 | rib_dump (__func__, (struct prefix_ipv4 *)&rn->p, rib); | |
1741 | } | |
1742 | rib_uninstall (rn, rib); | |
1743 | } | |
1744 | } | |
1745 | if (changed) | |
20e5ff0a | 1746 | rib_queue_add (&zebrad, rn); |
20e5ff0a DO |
1747 | } |
1748 | ||
718e3744 | 1749 | int |
1750 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib) | |
1751 | { | |
1752 | struct route_table *table; | |
1753 | struct route_node *rn; | |
1754 | struct rib *same; | |
1755 | struct nexthop *nexthop; | |
4d38fdb4 | 1756 | |
718e3744 | 1757 | /* Lookup table. */ |
1758 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1759 | if (! table) | |
1760 | return 0; | |
718e3744 | 1761 | /* Make it sure prefixlen is applied to the prefix. */ |
1762 | apply_mask_ipv4 (p); | |
1763 | ||
1764 | /* Set default distance by route type. */ | |
1765 | if (rib->distance == 0) | |
1766 | { | |
1767 | rib->distance = route_info[rib->type].distance; | |
1768 | ||
1769 | /* iBGP distance is 200. */ | |
1770 | if (rib->type == ZEBRA_ROUTE_BGP | |
1771 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
1772 | rib->distance = 200; | |
1773 | } | |
1774 | ||
1775 | /* Lookup route node.*/ | |
1776 | rn = route_node_get (table, (struct prefix *) p); | |
1777 | ||
1778 | /* If same type of route are installed, treat it as a implicit | |
1779 | withdraw. */ | |
1780 | for (same = rn->info; same; same = same->next) | |
1781 | { | |
0b8c4f1d | 1782 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
1783 | continue; |
1784 | ||
718e3744 | 1785 | if (same->type == rib->type && same->table == rib->table |
1786 | && same->type != ZEBRA_ROUTE_CONNECT) | |
4d38fdb4 | 1787 | break; |
718e3744 | 1788 | } |
4d38fdb4 | 1789 | |
718e3744 | 1790 | /* If this route is kernel route, set FIB flag to the route. */ |
1791 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
1792 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1793 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1794 | ||
1795 | /* Link new rib to node.*/ | |
1796 | rib_addnode (rn, rib); | |
dc95824a DO |
1797 | if (IS_ZEBRA_DEBUG_RIB) |
1798 | { | |
1799 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
1800 | __func__, rn, rib); | |
1801 | rib_dump (__func__, p, rib); | |
1802 | } | |
718e3744 | 1803 | |
718e3744 | 1804 | /* Free implicit route.*/ |
1805 | if (same) | |
dc95824a DO |
1806 | { |
1807 | if (IS_ZEBRA_DEBUG_RIB) | |
1808 | { | |
1809 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
1810 | __func__, rn, same); | |
1811 | rib_dump (__func__, p, same); | |
1812 | } | |
4d38fdb4 | 1813 | rib_delnode (rn, same); |
dc95824a | 1814 | } |
4d38fdb4 | 1815 | |
1816 | route_unlock_node (rn); | |
718e3744 | 1817 | return 0; |
1818 | } | |
1819 | ||
ebf1ead0 | 1820 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 1821 | int |
1822 | rib_delete_ipv4 (int type, int flags, struct prefix_ipv4 *p, | |
1823 | struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id) | |
1824 | { | |
1825 | struct route_table *table; | |
1826 | struct route_node *rn; | |
1827 | struct rib *rib; | |
1828 | struct rib *fib = NULL; | |
1829 | struct rib *same = NULL; | |
1830 | struct nexthop *nexthop; | |
81cce018 SH |
1831 | char buf1[INET_ADDRSTRLEN]; |
1832 | char buf2[INET_ADDRSTRLEN]; | |
718e3744 | 1833 | |
1834 | /* Lookup table. */ | |
1835 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1836 | if (! table) | |
1837 | return 0; | |
1838 | ||
1839 | /* Apply mask. */ | |
1840 | apply_mask_ipv4 (p); | |
1841 | ||
5ec90d28 | 1842 | if (IS_ZEBRA_DEBUG_KERNEL && gate) |
b6178002 | 1843 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", |
81cce018 | 1844 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
5ec90d28 | 1845 | p->prefixlen, |
1846 | inet_ntoa (*gate), | |
1847 | ifindex); | |
1848 | ||
718e3744 | 1849 | /* Lookup route node. */ |
1850 | rn = route_node_lookup (table, (struct prefix *) p); | |
1851 | if (! rn) | |
1852 | { | |
1853 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1854 | { | |
1855 | if (gate) | |
b6178002 | 1856 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 1857 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 1858 | p->prefixlen, |
81cce018 | 1859 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 1860 | ifindex); |
1861 | else | |
b6178002 | 1862 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 1863 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 1864 | p->prefixlen, |
1865 | ifindex); | |
1866 | } | |
1867 | return ZEBRA_ERR_RTNOEXIST; | |
1868 | } | |
1869 | ||
1870 | /* Lookup same type route. */ | |
1871 | for (rib = rn->info; rib; rib = rib->next) | |
1872 | { | |
6d691129 PJ |
1873 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
1874 | continue; | |
1875 | ||
718e3744 | 1876 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
1877 | fib = rib; | |
1878 | ||
ebf1ead0 | 1879 | if (rib->type != type) |
1880 | continue; | |
1881 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && | |
1882 | nexthop->type == NEXTHOP_TYPE_IFINDEX && nexthop->ifindex == ifindex) | |
718e3744 | 1883 | { |
ebf1ead0 | 1884 | if (rib->refcnt) |
718e3744 | 1885 | { |
ebf1ead0 | 1886 | rib->refcnt--; |
1887 | route_unlock_node (rn); | |
1888 | route_unlock_node (rn); | |
1889 | return 0; | |
718e3744 | 1890 | } |
ebf1ead0 | 1891 | same = rib; |
1892 | break; | |
718e3744 | 1893 | } |
ebf1ead0 | 1894 | /* Make sure that the route found has the same gateway. */ |
1895 | else if (gate == NULL || | |
1896 | ((nexthop = rib->nexthop) && | |
1897 | (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || | |
1898 | IPV4_ADDR_SAME (&nexthop->rgate.ipv4, gate)))) | |
5ec90d28 | 1899 | { |
ebf1ead0 | 1900 | same = rib; |
1901 | break; | |
718e3744 | 1902 | } |
1903 | } | |
1904 | ||
1905 | /* If same type of route can't be found and this message is from | |
1906 | kernel. */ | |
1907 | if (! same) | |
1908 | { | |
1909 | if (fib && type == ZEBRA_ROUTE_KERNEL) | |
1910 | { | |
1911 | /* Unset flags. */ | |
1912 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1913 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1914 | ||
1915 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1916 | } | |
1917 | else | |
1918 | { | |
1919 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1920 | { | |
1921 | if (gate) | |
b6178002 | 1922 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 1923 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 1924 | p->prefixlen, |
81cce018 | 1925 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 1926 | ifindex, |
1927 | type); | |
1928 | else | |
b6178002 | 1929 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 1930 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 1931 | p->prefixlen, |
1932 | ifindex, | |
1933 | type); | |
1934 | } | |
1935 | route_unlock_node (rn); | |
1936 | return ZEBRA_ERR_RTNOEXIST; | |
1937 | } | |
1938 | } | |
4d38fdb4 | 1939 | |
718e3744 | 1940 | if (same) |
4d38fdb4 | 1941 | rib_delnode (rn, same); |
1942 | ||
718e3744 | 1943 | route_unlock_node (rn); |
718e3744 | 1944 | return 0; |
1945 | } | |
1946 | \f | |
1947 | /* Install static route into rib. */ | |
a1ac18c4 | 1948 | static void |
718e3744 | 1949 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
1950 | { | |
1951 | struct rib *rib; | |
1952 | struct route_node *rn; | |
1953 | struct route_table *table; | |
1954 | ||
1955 | /* Lookup table. */ | |
1956 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1957 | if (! table) | |
1958 | return; | |
1959 | ||
1960 | /* Lookup existing route */ | |
1961 | rn = route_node_get (table, p); | |
1962 | for (rib = rn->info; rib; rib = rib->next) | |
6d691129 PJ |
1963 | { |
1964 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1965 | continue; | |
1966 | ||
1967 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
1968 | break; | |
1969 | } | |
718e3744 | 1970 | |
1971 | if (rib) | |
1972 | { | |
1973 | /* Same distance static route is there. Update it with new | |
1974 | nexthop. */ | |
718e3744 | 1975 | route_unlock_node (rn); |
718e3744 | 1976 | switch (si->type) |
7021c425 | 1977 | { |
1978 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 1979 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
7021c425 | 1980 | break; |
1981 | case STATIC_IPV4_IFNAME: | |
1982 | nexthop_ifname_add (rib, si->gate.ifname); | |
1983 | break; | |
1984 | case STATIC_IPV4_BLACKHOLE: | |
1985 | nexthop_blackhole_add (rib); | |
1986 | break; | |
4d38fdb4 | 1987 | } |
3c0755dc | 1988 | rib_queue_add (&zebrad, rn); |
718e3744 | 1989 | } |
1990 | else | |
1991 | { | |
1992 | /* This is new static route. */ | |
4d38fdb4 | 1993 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
1994 | ||
718e3744 | 1995 | rib->type = ZEBRA_ROUTE_STATIC; |
1996 | rib->distance = si->distance; | |
1997 | rib->metric = 0; | |
1998 | rib->nexthop_num = 0; | |
1999 | ||
2000 | switch (si->type) | |
7021c425 | 2001 | { |
2002 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2003 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
7021c425 | 2004 | break; |
2005 | case STATIC_IPV4_IFNAME: | |
2006 | nexthop_ifname_add (rib, si->gate.ifname); | |
2007 | break; | |
2008 | case STATIC_IPV4_BLACKHOLE: | |
2009 | nexthop_blackhole_add (rib); | |
2010 | break; | |
2011 | } | |
718e3744 | 2012 | |
81dfcaa2 | 2013 | /* Save the flags of this static routes (reject, blackhole) */ |
2014 | rib->flags = si->flags; | |
2015 | ||
718e3744 | 2016 | /* Link this rib to the tree. */ |
2017 | rib_addnode (rn, rib); | |
718e3744 | 2018 | } |
2019 | } | |
2020 | ||
a1ac18c4 | 2021 | static int |
718e3744 | 2022 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
2023 | { | |
2024 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2025 | && si->type == STATIC_IPV4_GATEWAY | |
2026 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
2027 | return 1; | |
2028 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2029 | && si->type == STATIC_IPV4_IFNAME | |
2030 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
2031 | return 1; | |
595db7f1 | 2032 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2033 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2034 | return 1; | |
e8e1946e | 2035 | return 0; |
718e3744 | 2036 | } |
2037 | ||
2038 | /* Uninstall static route from RIB. */ | |
a1ac18c4 | 2039 | static void |
718e3744 | 2040 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2041 | { | |
2042 | struct route_node *rn; | |
2043 | struct rib *rib; | |
2044 | struct nexthop *nexthop; | |
2045 | struct route_table *table; | |
2046 | ||
2047 | /* Lookup table. */ | |
2048 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2049 | if (! table) | |
2050 | return; | |
4d38fdb4 | 2051 | |
718e3744 | 2052 | /* Lookup existing route with type and distance. */ |
2053 | rn = route_node_lookup (table, p); | |
2054 | if (! rn) | |
2055 | return; | |
2056 | ||
2057 | for (rib = rn->info; rib; rib = rib->next) | |
6d691129 PJ |
2058 | { |
2059 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2060 | continue; | |
2061 | ||
2062 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2063 | break; | |
2064 | } | |
718e3744 | 2065 | |
2066 | if (! rib) | |
2067 | { | |
2068 | route_unlock_node (rn); | |
2069 | return; | |
2070 | } | |
2071 | ||
2072 | /* Lookup nexthop. */ | |
2073 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2074 | if (static_ipv4_nexthop_same (nexthop, si)) | |
2075 | break; | |
2076 | ||
2077 | /* Can't find nexthop. */ | |
2078 | if (! nexthop) | |
2079 | { | |
2080 | route_unlock_node (rn); | |
2081 | return; | |
2082 | } | |
2083 | ||
2084 | /* Check nexthop. */ | |
2085 | if (rib->nexthop_num == 1) | |
6d691129 | 2086 | rib_delnode (rn, rib); |
718e3744 | 2087 | else |
2088 | { | |
6baeb988 | 2089 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
2090 | rib_uninstall (rn, rib); | |
319572cc | 2091 | nexthop_delete (rib, nexthop); |
2092 | nexthop_free (nexthop); | |
6d691129 | 2093 | rib_queue_add (&zebrad, rn); |
718e3744 | 2094 | } |
718e3744 | 2095 | /* Unlock node. */ |
2096 | route_unlock_node (rn); | |
2097 | } | |
2098 | ||
2099 | /* Add static route into static route configuration. */ | |
2100 | int | |
39db97e4 | 2101 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
81dfcaa2 | 2102 | u_char flags, u_char distance, u_int32_t vrf_id) |
718e3744 | 2103 | { |
2104 | u_char type = 0; | |
2105 | struct route_node *rn; | |
2106 | struct static_ipv4 *si; | |
2107 | struct static_ipv4 *pp; | |
2108 | struct static_ipv4 *cp; | |
2109 | struct static_ipv4 *update = NULL; | |
2110 | struct route_table *stable; | |
2111 | ||
2112 | /* Lookup table. */ | |
2113 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2114 | if (! stable) | |
2115 | return -1; | |
2116 | ||
2117 | /* Lookup static route prefix. */ | |
2118 | rn = route_node_get (stable, p); | |
2119 | ||
2120 | /* Make flags. */ | |
2121 | if (gate) | |
2122 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 2123 | else if (ifname) |
718e3744 | 2124 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 2125 | else |
2126 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2127 | |
2128 | /* Do nothing if there is a same static route. */ | |
2129 | for (si = rn->info; si; si = si->next) | |
2130 | { | |
2131 | if (type == si->type | |
2132 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2133 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2134 | { | |
2135 | if (distance == si->distance) | |
2136 | { | |
2137 | route_unlock_node (rn); | |
2138 | return 0; | |
2139 | } | |
2140 | else | |
2141 | update = si; | |
2142 | } | |
2143 | } | |
2144 | ||
3c0755dc | 2145 | /* Distance changed. */ |
718e3744 | 2146 | if (update) |
2147 | static_delete_ipv4 (p, gate, ifname, update->distance, vrf_id); | |
2148 | ||
2149 | /* Make new static route structure. */ | |
393deb9b | 2150 | si = XCALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
718e3744 | 2151 | |
2152 | si->type = type; | |
2153 | si->distance = distance; | |
81dfcaa2 | 2154 | si->flags = flags; |
718e3744 | 2155 | |
2156 | if (gate) | |
2157 | si->gate.ipv4 = *gate; | |
2158 | if (ifname) | |
2159 | si->gate.ifname = XSTRDUP (0, ifname); | |
2160 | ||
2161 | /* Add new static route information to the tree with sort by | |
2162 | distance value and gateway address. */ | |
2163 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2164 | { | |
2165 | if (si->distance < cp->distance) | |
2166 | break; | |
2167 | if (si->distance > cp->distance) | |
2168 | continue; | |
2169 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
2170 | { | |
2171 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
2172 | break; | |
2173 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
2174 | continue; | |
2175 | } | |
2176 | } | |
2177 | ||
2178 | /* Make linked list. */ | |
2179 | if (pp) | |
2180 | pp->next = si; | |
2181 | else | |
2182 | rn->info = si; | |
2183 | if (cp) | |
2184 | cp->prev = si; | |
2185 | si->prev = pp; | |
2186 | si->next = cp; | |
2187 | ||
2188 | /* Install into rib. */ | |
2189 | static_install_ipv4 (p, si); | |
2190 | ||
2191 | return 1; | |
2192 | } | |
2193 | ||
2194 | /* Delete static route from static route configuration. */ | |
2195 | int | |
39db97e4 | 2196 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
718e3744 | 2197 | u_char distance, u_int32_t vrf_id) |
2198 | { | |
2199 | u_char type = 0; | |
2200 | struct route_node *rn; | |
2201 | struct static_ipv4 *si; | |
2202 | struct route_table *stable; | |
2203 | ||
2204 | /* Lookup table. */ | |
2205 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2206 | if (! stable) | |
2207 | return -1; | |
2208 | ||
2209 | /* Lookup static route prefix. */ | |
2210 | rn = route_node_lookup (stable, p); | |
2211 | if (! rn) | |
2212 | return 0; | |
2213 | ||
2214 | /* Make flags. */ | |
2215 | if (gate) | |
2216 | type = STATIC_IPV4_GATEWAY; | |
2217 | else if (ifname) | |
2218 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 2219 | else |
2220 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2221 | |
2222 | /* Find same static route is the tree */ | |
2223 | for (si = rn->info; si; si = si->next) | |
2224 | if (type == si->type | |
2225 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2226 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2227 | break; | |
2228 | ||
2229 | /* Can't find static route. */ | |
2230 | if (! si) | |
2231 | { | |
2232 | route_unlock_node (rn); | |
2233 | return 0; | |
2234 | } | |
2235 | ||
2236 | /* Install into rib. */ | |
2237 | static_uninstall_ipv4 (p, si); | |
2238 | ||
2239 | /* Unlink static route from linked list. */ | |
2240 | if (si->prev) | |
2241 | si->prev->next = si->next; | |
2242 | else | |
2243 | rn->info = si->next; | |
2244 | if (si->next) | |
2245 | si->next->prev = si->prev; | |
143a385f | 2246 | route_unlock_node (rn); |
718e3744 | 2247 | |
2248 | /* Free static route configuration. */ | |
a0f6acd8 | 2249 | if (ifname) |
2250 | XFREE (0, si->gate.ifname); | |
718e3744 | 2251 | XFREE (MTYPE_STATIC_IPV4, si); |
2252 | ||
143a385f | 2253 | route_unlock_node (rn); |
2254 | ||
718e3744 | 2255 | return 1; |
2256 | } | |
2257 | ||
2258 | \f | |
2259 | #ifdef HAVE_IPV6 | |
a1ac18c4 | 2260 | static int |
718e3744 | 2261 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
2262 | struct in6_addr *gate, unsigned int ifindex, int table) | |
2263 | { | |
726f9b2b | 2264 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
2265 | #if defined (MUSICA) || defined (LINUX) | |
2266 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
2267 | if (p->prefixlen == 96) | |
2268 | return 0; | |
2269 | #endif /* MUSICA */ | |
718e3744 | 2270 | return 1; |
726f9b2b | 2271 | } |
718e3744 | 2272 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
2273 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
2274 | { | |
2275 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
2276 | return 1; | |
2277 | } | |
2278 | return 0; | |
2279 | } | |
2280 | ||
2281 | int | |
2282 | rib_add_ipv6 (int type, int flags, struct prefix_ipv6 *p, | |
be61c4eb | 2283 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id, |
2284 | u_int32_t metric, u_char distance) | |
718e3744 | 2285 | { |
2286 | struct rib *rib; | |
2287 | struct rib *same = NULL; | |
2288 | struct route_table *table; | |
2289 | struct route_node *rn; | |
2290 | struct nexthop *nexthop; | |
2291 | ||
718e3744 | 2292 | /* Lookup table. */ |
2293 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2294 | if (! table) | |
2295 | return 0; | |
2296 | ||
2297 | /* Make sure mask is applied. */ | |
2298 | apply_mask_ipv6 (p); | |
2299 | ||
2300 | /* Set default distance by route type. */ | |
be61c4eb | 2301 | if (!distance) |
2302 | distance = route_info[type].distance; | |
718e3744 | 2303 | |
2304 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2305 | distance = 200; | |
2306 | ||
2307 | /* Filter bogus route. */ | |
2308 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
2309 | return 0; | |
2310 | ||
2311 | /* Lookup route node.*/ | |
2312 | rn = route_node_get (table, (struct prefix *) p); | |
2313 | ||
2314 | /* If same type of route are installed, treat it as a implicit | |
2315 | withdraw. */ | |
2316 | for (rib = rn->info; rib; rib = rib->next) | |
2317 | { | |
6d691129 PJ |
2318 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2319 | continue; | |
2320 | ||
ebf1ead0 | 2321 | if (rib->type != type) |
2322 | continue; | |
2323 | if (rib->type != ZEBRA_ROUTE_CONNECT) | |
718e3744 | 2324 | { |
2325 | same = rib; | |
718e3744 | 2326 | break; |
2327 | } | |
ebf1ead0 | 2328 | else if ((nexthop = rib->nexthop) && |
2329 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
2330 | nexthop->ifindex == ifindex) | |
2331 | { | |
2332 | rib->refcnt++; | |
2333 | return 0; | |
2334 | } | |
718e3744 | 2335 | } |
2336 | ||
2337 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2338 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2339 | ||
718e3744 | 2340 | rib->type = type; |
2341 | rib->distance = distance; | |
2342 | rib->flags = flags; | |
2343 | rib->metric = metric; | |
b5f45021 | 2344 | rib->table = vrf_id; |
718e3744 | 2345 | rib->nexthop_num = 0; |
2346 | rib->uptime = time (NULL); | |
2347 | ||
2348 | /* Nexthop settings. */ | |
2349 | if (gate) | |
2350 | { | |
2351 | if (ifindex) | |
2352 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
2353 | else | |
2354 | nexthop_ipv6_add (rib, gate); | |
2355 | } | |
2356 | else | |
2357 | nexthop_ifindex_add (rib, ifindex); | |
2358 | ||
2359 | /* If this route is kernel route, set FIB flag to the route. */ | |
2360 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2361 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2362 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2363 | ||
2364 | /* Link new rib to node.*/ | |
2365 | rib_addnode (rn, rib); | |
2366 | ||
718e3744 | 2367 | /* Free implicit route.*/ |
2368 | if (same) | |
4d38fdb4 | 2369 | rib_delnode (rn, same); |
2370 | ||
2371 | route_unlock_node (rn); | |
718e3744 | 2372 | return 0; |
2373 | } | |
2374 | ||
ebf1ead0 | 2375 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2376 | int |
2377 | rib_delete_ipv6 (int type, int flags, struct prefix_ipv6 *p, | |
2378 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id) | |
2379 | { | |
2380 | struct route_table *table; | |
2381 | struct route_node *rn; | |
2382 | struct rib *rib; | |
2383 | struct rib *fib = NULL; | |
2384 | struct rib *same = NULL; | |
2385 | struct nexthop *nexthop; | |
81cce018 SH |
2386 | char buf1[INET6_ADDRSTRLEN]; |
2387 | char buf2[INET6_ADDRSTRLEN]; | |
718e3744 | 2388 | |
2389 | /* Apply mask. */ | |
2390 | apply_mask_ipv6 (p); | |
2391 | ||
2392 | /* Lookup table. */ | |
2393 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2394 | if (! table) | |
2395 | return 0; | |
4d38fdb4 | 2396 | |
718e3744 | 2397 | /* Lookup route node. */ |
2398 | rn = route_node_lookup (table, (struct prefix *) p); | |
2399 | if (! rn) | |
2400 | { | |
2401 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2402 | { | |
2403 | if (gate) | |
b6178002 | 2404 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2405 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2406 | p->prefixlen, |
81cce018 | 2407 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 2408 | ifindex); |
2409 | else | |
b6178002 | 2410 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2411 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2412 | p->prefixlen, |
2413 | ifindex); | |
2414 | } | |
2415 | return ZEBRA_ERR_RTNOEXIST; | |
2416 | } | |
2417 | ||
2418 | /* Lookup same type route. */ | |
2419 | for (rib = rn->info; rib; rib = rib->next) | |
2420 | { | |
6d691129 PJ |
2421 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
2422 | continue; | |
2423 | ||
718e3744 | 2424 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2425 | fib = rib; | |
2426 | ||
ebf1ead0 | 2427 | if (rib->type != type) |
2428 | continue; | |
2429 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && | |
2430 | nexthop->type == NEXTHOP_TYPE_IFINDEX && nexthop->ifindex == ifindex) | |
718e3744 | 2431 | { |
ebf1ead0 | 2432 | if (rib->refcnt) |
718e3744 | 2433 | { |
ebf1ead0 | 2434 | rib->refcnt--; |
2435 | route_unlock_node (rn); | |
2436 | route_unlock_node (rn); | |
2437 | return 0; | |
718e3744 | 2438 | } |
ebf1ead0 | 2439 | same = rib; |
2440 | break; | |
718e3744 | 2441 | } |
ebf1ead0 | 2442 | /* Make sure that the route found has the same gateway. */ |
2443 | else if (gate == NULL || | |
2444 | ((nexthop = rib->nexthop) && | |
2445 | (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate) || | |
2446 | IPV6_ADDR_SAME (&nexthop->rgate.ipv6, gate)))) | |
718e3744 | 2447 | { |
ebf1ead0 | 2448 | same = rib; |
2449 | break; | |
718e3744 | 2450 | } |
2451 | } | |
2452 | ||
2453 | /* If same type of route can't be found and this message is from | |
2454 | kernel. */ | |
2455 | if (! same) | |
2456 | { | |
2457 | if (fib && type == ZEBRA_ROUTE_KERNEL) | |
2458 | { | |
2459 | /* Unset flags. */ | |
2460 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2461 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2462 | ||
2463 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2464 | } | |
2465 | else | |
2466 | { | |
2467 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2468 | { | |
2469 | if (gate) | |
b6178002 | 2470 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2471 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2472 | p->prefixlen, |
81cce018 | 2473 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 2474 | ifindex, |
2475 | type); | |
2476 | else | |
b6178002 | 2477 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2478 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2479 | p->prefixlen, |
2480 | ifindex, | |
2481 | type); | |
2482 | } | |
2483 | route_unlock_node (rn); | |
2484 | return ZEBRA_ERR_RTNOEXIST; | |
2485 | } | |
2486 | } | |
2487 | ||
718e3744 | 2488 | if (same) |
4d38fdb4 | 2489 | rib_delnode (rn, same); |
2490 | ||
718e3744 | 2491 | route_unlock_node (rn); |
718e3744 | 2492 | return 0; |
2493 | } | |
2494 | \f | |
2495 | /* Install static route into rib. */ | |
a1ac18c4 | 2496 | static void |
718e3744 | 2497 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
2498 | { | |
2499 | struct rib *rib; | |
2500 | struct route_table *table; | |
2501 | struct route_node *rn; | |
2502 | ||
2503 | /* Lookup table. */ | |
2504 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2505 | if (! table) | |
2506 | return; | |
2507 | ||
2508 | /* Lookup existing route */ | |
2509 | rn = route_node_get (table, p); | |
2510 | for (rib = rn->info; rib; rib = rib->next) | |
6d691129 PJ |
2511 | { |
2512 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) | |
2513 | continue; | |
2514 | ||
2515 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2516 | break; | |
2517 | } | |
718e3744 | 2518 | |
2519 | if (rib) | |
2520 | { | |
2521 | /* Same distance static route is there. Update it with new | |
2522 | nexthop. */ | |
718e3744 | 2523 | route_unlock_node (rn); |
2524 | ||
2525 | switch (si->type) | |
2526 | { | |
2527 | case STATIC_IPV6_GATEWAY: | |
2528 | nexthop_ipv6_add (rib, &si->ipv6); | |
2529 | break; | |
2530 | case STATIC_IPV6_IFNAME: | |
2531 | nexthop_ifname_add (rib, si->ifname); | |
2532 | break; | |
2533 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2534 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
2535 | break; | |
2536 | } | |
3c0755dc | 2537 | rib_queue_add (&zebrad, rn); |
718e3744 | 2538 | } |
2539 | else | |
2540 | { | |
2541 | /* This is new static route. */ | |
4d38fdb4 | 2542 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2543 | ||
718e3744 | 2544 | rib->type = ZEBRA_ROUTE_STATIC; |
2545 | rib->distance = si->distance; | |
2546 | rib->metric = 0; | |
2547 | rib->nexthop_num = 0; | |
2548 | ||
2549 | switch (si->type) | |
2550 | { | |
2551 | case STATIC_IPV6_GATEWAY: | |
2552 | nexthop_ipv6_add (rib, &si->ipv6); | |
2553 | break; | |
2554 | case STATIC_IPV6_IFNAME: | |
2555 | nexthop_ifname_add (rib, si->ifname); | |
2556 | break; | |
2557 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2558 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
2559 | break; | |
2560 | } | |
2561 | ||
81dfcaa2 | 2562 | /* Save the flags of this static routes (reject, blackhole) */ |
2563 | rib->flags = si->flags; | |
2564 | ||
718e3744 | 2565 | /* Link this rib to the tree. */ |
2566 | rib_addnode (rn, rib); | |
718e3744 | 2567 | } |
2568 | } | |
2569 | ||
a1ac18c4 | 2570 | static int |
718e3744 | 2571 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
2572 | { | |
2573 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
2574 | && si->type == STATIC_IPV6_GATEWAY | |
2575 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
2576 | return 1; | |
2577 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2578 | && si->type == STATIC_IPV6_IFNAME | |
2579 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
2580 | return 1; | |
2581 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
2582 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
2583 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
2584 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
2585 | return 1; | |
e8e1946e | 2586 | return 0; |
718e3744 | 2587 | } |
2588 | ||
a1ac18c4 | 2589 | static void |
718e3744 | 2590 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
2591 | { | |
2592 | struct route_table *table; | |
2593 | struct route_node *rn; | |
2594 | struct rib *rib; | |
2595 | struct nexthop *nexthop; | |
2596 | ||
2597 | /* Lookup table. */ | |
2598 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2599 | if (! table) | |
2600 | return; | |
2601 | ||
2602 | /* Lookup existing route with type and distance. */ | |
2603 | rn = route_node_lookup (table, (struct prefix *) p); | |
2604 | if (! rn) | |
2605 | return; | |
2606 | ||
2607 | for (rib = rn->info; rib; rib = rib->next) | |
6d691129 PJ |
2608 | { |
2609 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2610 | continue; | |
2611 | ||
2612 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2613 | break; | |
2614 | } | |
2615 | ||
718e3744 | 2616 | if (! rib) |
2617 | { | |
2618 | route_unlock_node (rn); | |
2619 | return; | |
2620 | } | |
2621 | ||
2622 | /* Lookup nexthop. */ | |
2623 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2624 | if (static_ipv6_nexthop_same (nexthop, si)) | |
2625 | break; | |
2626 | ||
2627 | /* Can't find nexthop. */ | |
2628 | if (! nexthop) | |
2629 | { | |
2630 | route_unlock_node (rn); | |
2631 | return; | |
2632 | } | |
2633 | ||
2634 | /* Check nexthop. */ | |
2635 | if (rib->nexthop_num == 1) | |
2636 | { | |
2637 | rib_delnode (rn, rib); | |
718e3744 | 2638 | } |
2639 | else | |
2640 | { | |
6baeb988 | 2641 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
2642 | rib_uninstall (rn, rib); | |
319572cc | 2643 | nexthop_delete (rib, nexthop); |
2644 | nexthop_free (nexthop); | |
6d691129 | 2645 | rib_queue_add (&zebrad, rn); |
718e3744 | 2646 | } |
718e3744 | 2647 | /* Unlock node. */ |
2648 | route_unlock_node (rn); | |
2649 | } | |
2650 | ||
2651 | /* Add static route into static route configuration. */ | |
2652 | int | |
2653 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
39db97e4 | 2654 | const char *ifname, u_char flags, u_char distance, |
2655 | u_int32_t vrf_id) | |
718e3744 | 2656 | { |
2657 | struct route_node *rn; | |
2658 | struct static_ipv6 *si; | |
2659 | struct static_ipv6 *pp; | |
2660 | struct static_ipv6 *cp; | |
2661 | struct route_table *stable; | |
2662 | ||
2663 | /* Lookup table. */ | |
2664 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
2665 | if (! stable) | |
2666 | return -1; | |
27b47253 PJ |
2667 | |
2668 | if (!gate && | |
2669 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
2670 | return -1; | |
2671 | ||
2672 | if (!ifname && | |
2673 | (type == STATIC_IPV6_GATEWAY_IFNAME || type == STATIC_IPV6_IFNAME)) | |
2674 | return -1; | |
718e3744 | 2675 | |
2676 | /* Lookup static route prefix. */ | |
2677 | rn = route_node_get (stable, p); | |
2678 | ||
2679 | /* Do nothing if there is a same static route. */ | |
2680 | for (si = rn->info; si; si = si->next) | |
2681 | { | |
2682 | if (distance == si->distance | |
2683 | && type == si->type | |
2684 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
2685 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
2686 | { | |
2687 | route_unlock_node (rn); | |
2688 | return 0; | |
2689 | } | |
2690 | } | |
2691 | ||
2692 | /* Make new static route structure. */ | |
393deb9b | 2693 | si = XCALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
718e3744 | 2694 | |
2695 | si->type = type; | |
2696 | si->distance = distance; | |
81dfcaa2 | 2697 | si->flags = flags; |
718e3744 | 2698 | |
2699 | switch (type) | |
2700 | { | |
2701 | case STATIC_IPV6_GATEWAY: | |
2702 | si->ipv6 = *gate; | |
2703 | break; | |
2704 | case STATIC_IPV6_IFNAME: | |
2705 | si->ifname = XSTRDUP (0, ifname); | |
2706 | break; | |
2707 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2708 | si->ipv6 = *gate; | |
2709 | si->ifname = XSTRDUP (0, ifname); | |
2710 | break; | |
2711 | } | |
2712 | ||
2713 | /* Add new static route information to the tree with sort by | |
2714 | distance value and gateway address. */ | |
2715 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2716 | { | |
2717 | if (si->distance < cp->distance) | |
2718 | break; | |
2719 | if (si->distance > cp->distance) | |
2720 | continue; | |
2721 | } | |
2722 | ||
2723 | /* Make linked list. */ | |
2724 | if (pp) | |
2725 | pp->next = si; | |
2726 | else | |
2727 | rn->info = si; | |
2728 | if (cp) | |
2729 | cp->prev = si; | |
2730 | si->prev = pp; | |
2731 | si->next = cp; | |
2732 | ||
2733 | /* Install into rib. */ | |
2734 | static_install_ipv6 (p, si); | |
2735 | ||
2736 | return 1; | |
2737 | } | |
2738 | ||
2739 | /* Delete static route from static route configuration. */ | |
2740 | int | |
2741 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
39db97e4 | 2742 | const char *ifname, u_char distance, u_int32_t vrf_id) |
718e3744 | 2743 | { |
2744 | struct route_node *rn; | |
2745 | struct static_ipv6 *si; | |
2746 | struct route_table *stable; | |
2747 | ||
2748 | /* Lookup table. */ | |
2749 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
2750 | if (! stable) | |
2751 | return -1; | |
2752 | ||
2753 | /* Lookup static route prefix. */ | |
2754 | rn = route_node_lookup (stable, p); | |
2755 | if (! rn) | |
2756 | return 0; | |
2757 | ||
2758 | /* Find same static route is the tree */ | |
2759 | for (si = rn->info; si; si = si->next) | |
2760 | if (distance == si->distance | |
2761 | && type == si->type | |
2762 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
2763 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
2764 | break; | |
2765 | ||
2766 | /* Can't find static route. */ | |
2767 | if (! si) | |
2768 | { | |
2769 | route_unlock_node (rn); | |
2770 | return 0; | |
2771 | } | |
2772 | ||
2773 | /* Install into rib. */ | |
2774 | static_uninstall_ipv6 (p, si); | |
2775 | ||
2776 | /* Unlink static route from linked list. */ | |
2777 | if (si->prev) | |
2778 | si->prev->next = si->next; | |
2779 | else | |
2780 | rn->info = si->next; | |
2781 | if (si->next) | |
2782 | si->next->prev = si->prev; | |
2783 | ||
2784 | /* Free static route configuration. */ | |
a0f6acd8 | 2785 | if (ifname) |
2786 | XFREE (0, si->ifname); | |
718e3744 | 2787 | XFREE (MTYPE_STATIC_IPV6, si); |
2788 | ||
2789 | return 1; | |
2790 | } | |
2791 | #endif /* HAVE_IPV6 */ | |
2792 | \f | |
2793 | /* RIB update function. */ | |
2794 | void | |
a1ac18c4 | 2795 | rib_update (void) |
718e3744 | 2796 | { |
2797 | struct route_node *rn; | |
2798 | struct route_table *table; | |
4d38fdb4 | 2799 | |
718e3744 | 2800 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
2801 | if (table) | |
2802 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
4d38fdb4 | 2803 | if (rn->info) |
6d691129 | 2804 | rib_queue_add (&zebrad, rn); |
718e3744 | 2805 | |
2806 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2807 | if (table) | |
2808 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
4d38fdb4 | 2809 | if (rn->info) |
6d691129 | 2810 | rib_queue_add (&zebrad, rn); |
718e3744 | 2811 | } |
2812 | ||
718e3744 | 2813 | \f |
2814 | /* Remove all routes which comes from non main table. */ | |
a1ac18c4 | 2815 | static void |
718e3744 | 2816 | rib_weed_table (struct route_table *table) |
2817 | { | |
2818 | struct route_node *rn; | |
2819 | struct rib *rib; | |
2820 | struct rib *next; | |
2821 | ||
2822 | if (table) | |
2823 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2824 | for (rib = rn->info; rib; rib = next) | |
2825 | { | |
2826 | next = rib->next; | |
2827 | ||
6d691129 PJ |
2828 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2829 | continue; | |
2830 | ||
b21b19c5 | 2831 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 2832 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 2833 | rib_delnode (rn, rib); |
718e3744 | 2834 | } |
2835 | } | |
2836 | ||
2837 | /* Delete all routes from non main table. */ | |
2838 | void | |
a1ac18c4 | 2839 | rib_weed_tables (void) |
718e3744 | 2840 | { |
2841 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
2842 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2843 | } | |
2844 | \f | |
2845 | /* Delete self installed routes after zebra is relaunched. */ | |
a1ac18c4 | 2846 | static void |
718e3744 | 2847 | rib_sweep_table (struct route_table *table) |
2848 | { | |
2849 | struct route_node *rn; | |
2850 | struct rib *rib; | |
2851 | struct rib *next; | |
2852 | int ret = 0; | |
2853 | ||
2854 | if (table) | |
2855 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2856 | for (rib = rn->info; rib; rib = next) | |
2857 | { | |
2858 | next = rib->next; | |
2859 | ||
6d691129 PJ |
2860 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2861 | continue; | |
2862 | ||
718e3744 | 2863 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
2864 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
2865 | { | |
2866 | ret = rib_uninstall_kernel (rn, rib); | |
2867 | if (! ret) | |
4d38fdb4 | 2868 | rib_delnode (rn, rib); |
718e3744 | 2869 | } |
2870 | } | |
2871 | } | |
2872 | ||
2873 | /* Sweep all RIB tables. */ | |
2874 | void | |
a1ac18c4 | 2875 | rib_sweep_route (void) |
718e3744 | 2876 | { |
2877 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
2878 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2879 | } | |
2880 | \f | |
2881 | /* Close RIB and clean up kernel routes. */ | |
a1ac18c4 | 2882 | static void |
718e3744 | 2883 | rib_close_table (struct route_table *table) |
2884 | { | |
2885 | struct route_node *rn; | |
2886 | struct rib *rib; | |
2887 | ||
2888 | if (table) | |
2889 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2890 | for (rib = rn->info; rib; rib = rib->next) | |
6d691129 PJ |
2891 | { |
2892 | if (! RIB_SYSTEM_ROUTE (rib) | |
2893 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
2894 | rib_uninstall_kernel (rn, rib); | |
2895 | } | |
718e3744 | 2896 | } |
2897 | ||
2898 | /* Close all RIB tables. */ | |
2899 | void | |
a1ac18c4 | 2900 | rib_close (void) |
718e3744 | 2901 | { |
2902 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
2903 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2904 | } | |
2905 | \f | |
2906 | /* Routing information base initialize. */ | |
2907 | void | |
a1ac18c4 | 2908 | rib_init (void) |
718e3744 | 2909 | { |
4d38fdb4 | 2910 | rib_queue_init (&zebrad); |
718e3744 | 2911 | /* VRF initialization. */ |
2912 | vrf_init (); | |
2913 | } |