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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; | |
5734509c | 58 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 59 | { |
5734509c PJ |
60 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
61 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
62 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
63 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
64 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
65 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
66 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
67 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
68 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
69 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
70 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 95}, | |
7052f228 | 71 | /* no entry/default: 150 */ |
718e3744 | 72 | }; |
73 | \f | |
74 | /* Vector for routing table. */ | |
d145bc00 | 75 | static vector vrf_vector; |
718e3744 | 76 | |
1b5ed1b0 AS |
77 | /* |
78 | * vrf_table_create | |
79 | */ | |
80 | static void | |
81 | vrf_table_create (struct vrf *vrf, afi_t afi, safi_t safi) | |
82 | { | |
83 | rib_table_info_t *info; | |
84 | struct route_table *table; | |
85 | ||
86 | assert (!vrf->table[afi][safi]); | |
87 | ||
88 | table = route_table_init (); | |
89 | vrf->table[afi][safi] = table; | |
90 | ||
91 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
92 | info->vrf = vrf; | |
93 | info->afi = afi; | |
94 | info->safi = safi; | |
95 | table->info = info; | |
96 | } | |
97 | ||
718e3744 | 98 | /* Allocate new VRF. */ |
a1ac18c4 | 99 | static struct vrf * |
fce954f8 | 100 | vrf_alloc (const char *name) |
718e3744 | 101 | { |
102 | struct vrf *vrf; | |
103 | ||
104 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); | |
105 | ||
106 | /* Put name. */ | |
107 | if (name) | |
108 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); | |
109 | ||
110 | /* Allocate routing table and static table. */ | |
1b5ed1b0 AS |
111 | vrf_table_create (vrf, AFI_IP, SAFI_UNICAST); |
112 | vrf_table_create (vrf, AFI_IP6, SAFI_UNICAST); | |
718e3744 | 113 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); |
114 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
1b5ed1b0 AS |
115 | vrf_table_create (vrf, AFI_IP, SAFI_MULTICAST); |
116 | vrf_table_create (vrf, AFI_IP6, SAFI_MULTICAST); | |
cddf391b B |
117 | vrf->stable[AFI_IP][SAFI_MULTICAST] = route_table_init (); |
118 | vrf->stable[AFI_IP6][SAFI_MULTICAST] = route_table_init (); | |
119 | ||
718e3744 | 120 | |
121 | return vrf; | |
122 | } | |
123 | ||
718e3744 | 124 | /* Lookup VRF by identifier. */ |
125 | struct vrf * | |
126 | vrf_lookup (u_int32_t id) | |
127 | { | |
128 | return vector_lookup (vrf_vector, id); | |
129 | } | |
130 | ||
718e3744 | 131 | /* Initialize VRF. */ |
a1ac18c4 | 132 | static void |
133 | vrf_init (void) | |
718e3744 | 134 | { |
135 | struct vrf *default_table; | |
136 | ||
137 | /* Allocate VRF vector. */ | |
138 | vrf_vector = vector_init (1); | |
139 | ||
140 | /* Allocate default main table. */ | |
141 | default_table = vrf_alloc ("Default-IP-Routing-Table"); | |
142 | ||
143 | /* Default table index must be 0. */ | |
144 | vector_set_index (vrf_vector, 0, default_table); | |
145 | } | |
146 | ||
147 | /* Lookup route table. */ | |
148 | struct route_table * | |
149 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) | |
150 | { | |
151 | struct vrf *vrf; | |
152 | ||
153 | vrf = vrf_lookup (id); | |
154 | if (! vrf) | |
155 | return NULL; | |
156 | ||
157 | return vrf->table[afi][safi]; | |
158 | } | |
159 | ||
160 | /* Lookup static route table. */ | |
161 | struct route_table * | |
162 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) | |
163 | { | |
164 | struct vrf *vrf; | |
165 | ||
166 | vrf = vrf_lookup (id); | |
167 | if (! vrf) | |
168 | return NULL; | |
169 | ||
170 | return vrf->stable[afi][safi]; | |
171 | } | |
172 | \f | |
78deec45 AS |
173 | /* |
174 | * nexthop_type_to_str | |
175 | */ | |
176 | const char * | |
177 | nexthop_type_to_str (enum nexthop_types_t nh_type) | |
178 | { | |
179 | static const char *desc[] = { | |
180 | "none", | |
181 | "Directly connected", | |
182 | "Interface route", | |
183 | "IPv4 nexthop", | |
184 | "IPv4 nexthop with ifindex", | |
185 | "IPv4 nexthop with ifname", | |
186 | "IPv6 nexthop", | |
187 | "IPv6 nexthop with ifindex", | |
188 | "IPv6 nexthop with ifname", | |
189 | "Null0 nexthop", | |
190 | }; | |
191 | ||
192 | if (nh_type >= ZEBRA_NUM_OF (desc)) | |
193 | return "<Invalid nh type>"; | |
194 | ||
195 | return desc[nh_type]; | |
196 | } | |
197 | ||
718e3744 | 198 | /* Add nexthop to the end of the list. */ |
a1ac18c4 | 199 | static void |
718e3744 | 200 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
201 | { | |
202 | struct nexthop *last; | |
203 | ||
204 | for (last = rib->nexthop; last && last->next; last = last->next) | |
205 | ; | |
206 | if (last) | |
207 | last->next = nexthop; | |
208 | else | |
209 | rib->nexthop = nexthop; | |
210 | nexthop->prev = last; | |
211 | ||
212 | rib->nexthop_num++; | |
213 | } | |
214 | ||
215 | /* Delete specified nexthop from the list. */ | |
a1ac18c4 | 216 | static void |
718e3744 | 217 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
218 | { | |
219 | if (nexthop->next) | |
220 | nexthop->next->prev = nexthop->prev; | |
221 | if (nexthop->prev) | |
222 | nexthop->prev->next = nexthop->next; | |
223 | else | |
224 | rib->nexthop = nexthop->next; | |
225 | rib->nexthop_num--; | |
226 | } | |
227 | ||
228 | /* Free nexthop. */ | |
a1ac18c4 | 229 | static void |
718e3744 | 230 | nexthop_free (struct nexthop *nexthop) |
231 | { | |
a4b70768 | 232 | if (nexthop->ifname) |
233 | XFREE (0, nexthop->ifname); | |
718e3744 | 234 | XFREE (MTYPE_NEXTHOP, nexthop); |
235 | } | |
236 | ||
237 | struct nexthop * | |
238 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
239 | { | |
240 | struct nexthop *nexthop; | |
241 | ||
393deb9b | 242 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 243 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
244 | nexthop->ifindex = ifindex; | |
245 | ||
246 | nexthop_add (rib, nexthop); | |
247 | ||
248 | return nexthop; | |
249 | } | |
250 | ||
251 | struct nexthop * | |
252 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
253 | { | |
254 | struct nexthop *nexthop; | |
255 | ||
393deb9b | 256 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 257 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
a4b70768 | 258 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 259 | |
260 | nexthop_add (rib, nexthop); | |
261 | ||
262 | return nexthop; | |
263 | } | |
264 | ||
265 | struct nexthop * | |
7514fb77 | 266 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 267 | { |
268 | struct nexthop *nexthop; | |
269 | ||
393deb9b | 270 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 271 | nexthop->type = NEXTHOP_TYPE_IPV4; |
272 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
273 | if (src) |
274 | nexthop->src.ipv4 = *src; | |
718e3744 | 275 | |
276 | nexthop_add (rib, nexthop); | |
277 | ||
278 | return nexthop; | |
279 | } | |
280 | ||
26e2ae36 | 281 | struct nexthop * |
718e3744 | 282 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
7514fb77 | 283 | struct in_addr *src, unsigned int ifindex) |
718e3744 | 284 | { |
285 | struct nexthop *nexthop; | |
286 | ||
393deb9b | 287 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 288 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
289 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
290 | if (src) |
291 | nexthop->src.ipv4 = *src; | |
718e3744 | 292 | nexthop->ifindex = ifindex; |
293 | ||
294 | nexthop_add (rib, nexthop); | |
295 | ||
296 | return nexthop; | |
297 | } | |
298 | ||
299 | #ifdef HAVE_IPV6 | |
300 | struct nexthop * | |
301 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
302 | { | |
303 | struct nexthop *nexthop; | |
304 | ||
393deb9b | 305 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 306 | nexthop->type = NEXTHOP_TYPE_IPV6; |
307 | nexthop->gate.ipv6 = *ipv6; | |
308 | ||
309 | nexthop_add (rib, nexthop); | |
310 | ||
311 | return nexthop; | |
312 | } | |
313 | ||
a1ac18c4 | 314 | static struct nexthop * |
718e3744 | 315 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
316 | char *ifname) | |
317 | { | |
318 | struct nexthop *nexthop; | |
319 | ||
393deb9b | 320 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 321 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
322 | nexthop->gate.ipv6 = *ipv6; | |
323 | nexthop->ifname = XSTRDUP (0, ifname); | |
324 | ||
325 | nexthop_add (rib, nexthop); | |
326 | ||
327 | return nexthop; | |
328 | } | |
329 | ||
a1ac18c4 | 330 | static struct nexthop * |
718e3744 | 331 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
332 | unsigned int ifindex) | |
333 | { | |
334 | struct nexthop *nexthop; | |
335 | ||
393deb9b | 336 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 337 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
338 | nexthop->gate.ipv6 = *ipv6; | |
339 | nexthop->ifindex = ifindex; | |
340 | ||
341 | nexthop_add (rib, nexthop); | |
342 | ||
343 | return nexthop; | |
344 | } | |
345 | #endif /* HAVE_IPV6 */ | |
346 | ||
595db7f1 | 347 | struct nexthop * |
348 | nexthop_blackhole_add (struct rib *rib) | |
349 | { | |
350 | struct nexthop *nexthop; | |
351 | ||
393deb9b | 352 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
595db7f1 | 353 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
354 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
355 | ||
356 | nexthop_add (rib, nexthop); | |
357 | ||
358 | return nexthop; | |
359 | } | |
360 | ||
718e3744 | 361 | /* If force flag is not set, do not modify falgs at all for uninstall |
362 | the route from FIB. */ | |
a1ac18c4 | 363 | static int |
718e3744 | 364 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
365 | struct route_node *top) | |
366 | { | |
367 | struct prefix_ipv4 p; | |
368 | struct route_table *table; | |
369 | struct route_node *rn; | |
370 | struct rib *match; | |
371 | struct nexthop *newhop; | |
372 | ||
373 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
374 | nexthop->ifindex = 0; | |
375 | ||
376 | if (set) | |
377 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
378 | ||
379 | /* Make lookup prefix. */ | |
380 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
381 | p.family = AF_INET; | |
382 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
383 | p.prefix = nexthop->gate.ipv4; | |
384 | ||
385 | /* Lookup table. */ | |
386 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
387 | if (! table) | |
388 | return 0; | |
389 | ||
390 | rn = route_node_match (table, (struct prefix *) &p); | |
391 | while (rn) | |
392 | { | |
393 | route_unlock_node (rn); | |
394 | ||
a50c107e | 395 | /* If lookup self prefix return immediately. */ |
718e3744 | 396 | if (rn == top) |
397 | return 0; | |
398 | ||
399 | /* Pick up selected route. */ | |
9fd92e3c | 400 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
401 | { |
402 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
403 | continue; | |
404 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
405 | break; | |
406 | } | |
718e3744 | 407 | |
408 | /* If there is no selected route or matched route is EGP, go up | |
409 | tree. */ | |
410 | if (! match | |
411 | || match->type == ZEBRA_ROUTE_BGP) | |
412 | { | |
413 | do { | |
414 | rn = rn->parent; | |
415 | } while (rn && rn->info == NULL); | |
416 | if (rn) | |
417 | route_lock_node (rn); | |
418 | } | |
419 | else | |
420 | { | |
421 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
422 | { | |
423 | /* Directly point connected route. */ | |
424 | newhop = match->nexthop; | |
425 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
426 | nexthop->ifindex = newhop->ifindex; | |
427 | ||
428 | return 1; | |
429 | } | |
430 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
431 | { | |
432 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
433 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
434 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
435 | { | |
436 | if (set) | |
437 | { | |
438 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
439 | nexthop->rtype = newhop->type; | |
440 | if (newhop->type == NEXTHOP_TYPE_IPV4 || | |
441 | newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
442 | nexthop->rgate.ipv4 = newhop->gate.ipv4; | |
443 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
444 | || newhop->type == NEXTHOP_TYPE_IFNAME | |
445 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
446 | nexthop->rifindex = newhop->ifindex; | |
447 | } | |
448 | return 1; | |
449 | } | |
450 | return 0; | |
451 | } | |
452 | else | |
453 | { | |
454 | return 0; | |
455 | } | |
456 | } | |
457 | } | |
458 | return 0; | |
459 | } | |
460 | ||
461 | #ifdef HAVE_IPV6 | |
462 | /* If force flag is not set, do not modify falgs at all for uninstall | |
463 | the route from FIB. */ | |
a1ac18c4 | 464 | static int |
718e3744 | 465 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
466 | struct route_node *top) | |
467 | { | |
468 | struct prefix_ipv6 p; | |
469 | struct route_table *table; | |
470 | struct route_node *rn; | |
471 | struct rib *match; | |
472 | struct nexthop *newhop; | |
473 | ||
474 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
475 | nexthop->ifindex = 0; | |
476 | ||
477 | if (set) | |
478 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
479 | ||
480 | /* Make lookup prefix. */ | |
481 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
482 | p.family = AF_INET6; | |
483 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
484 | p.prefix = nexthop->gate.ipv6; | |
485 | ||
486 | /* Lookup table. */ | |
487 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
488 | if (! table) | |
489 | return 0; | |
490 | ||
491 | rn = route_node_match (table, (struct prefix *) &p); | |
492 | while (rn) | |
493 | { | |
494 | route_unlock_node (rn); | |
495 | ||
a50c107e | 496 | /* If lookup self prefix return immediately. */ |
718e3744 | 497 | if (rn == top) |
498 | return 0; | |
499 | ||
500 | /* Pick up selected route. */ | |
9fd92e3c | 501 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
502 | { |
503 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
504 | continue; | |
505 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
506 | break; | |
507 | } | |
718e3744 | 508 | |
509 | /* If there is no selected route or matched route is EGP, go up | |
510 | tree. */ | |
511 | if (! match | |
512 | || match->type == ZEBRA_ROUTE_BGP) | |
513 | { | |
514 | do { | |
515 | rn = rn->parent; | |
516 | } while (rn && rn->info == NULL); | |
517 | if (rn) | |
518 | route_lock_node (rn); | |
519 | } | |
520 | else | |
521 | { | |
522 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
523 | { | |
524 | /* Directly point connected route. */ | |
525 | newhop = match->nexthop; | |
526 | ||
527 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
528 | nexthop->ifindex = newhop->ifindex; | |
529 | ||
530 | return 1; | |
531 | } | |
532 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
533 | { | |
534 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
535 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
536 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
537 | { | |
538 | if (set) | |
539 | { | |
540 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
541 | nexthop->rtype = newhop->type; | |
542 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
543 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
544 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
545 | nexthop->rgate.ipv6 = newhop->gate.ipv6; | |
546 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
547 | || newhop->type == NEXTHOP_TYPE_IFNAME | |
548 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
549 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
550 | nexthop->rifindex = newhop->ifindex; | |
551 | } | |
552 | return 1; | |
553 | } | |
554 | return 0; | |
555 | } | |
556 | else | |
557 | { | |
558 | return 0; | |
559 | } | |
560 | } | |
561 | } | |
562 | return 0; | |
563 | } | |
564 | #endif /* HAVE_IPV6 */ | |
565 | ||
566 | struct rib * | |
567 | rib_match_ipv4 (struct in_addr addr) | |
568 | { | |
569 | struct prefix_ipv4 p; | |
570 | struct route_table *table; | |
571 | struct route_node *rn; | |
572 | struct rib *match; | |
573 | struct nexthop *newhop; | |
574 | ||
575 | /* Lookup table. */ | |
576 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
577 | if (! table) | |
578 | return 0; | |
579 | ||
580 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
581 | p.family = AF_INET; | |
582 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
583 | p.prefix = addr; | |
584 | ||
585 | rn = route_node_match (table, (struct prefix *) &p); | |
586 | ||
587 | while (rn) | |
588 | { | |
589 | route_unlock_node (rn); | |
590 | ||
591 | /* Pick up selected route. */ | |
9fd92e3c | 592 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
593 | { |
594 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
595 | continue; | |
596 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
597 | break; | |
598 | } | |
718e3744 | 599 | |
600 | /* If there is no selected route or matched route is EGP, go up | |
601 | tree. */ | |
602 | if (! match | |
603 | || match->type == ZEBRA_ROUTE_BGP) | |
604 | { | |
605 | do { | |
606 | rn = rn->parent; | |
607 | } while (rn && rn->info == NULL); | |
608 | if (rn) | |
609 | route_lock_node (rn); | |
610 | } | |
611 | else | |
612 | { | |
613 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
614 | /* Directly point connected route. */ | |
615 | return match; | |
616 | else | |
617 | { | |
618 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
619 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
620 | return match; | |
621 | return NULL; | |
622 | } | |
623 | } | |
624 | } | |
625 | return NULL; | |
626 | } | |
627 | ||
628 | struct rib * | |
629 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
630 | { | |
631 | struct route_table *table; | |
632 | struct route_node *rn; | |
633 | struct rib *match; | |
634 | struct nexthop *nexthop; | |
635 | ||
636 | /* Lookup table. */ | |
637 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
638 | if (! table) | |
639 | return 0; | |
640 | ||
641 | rn = route_node_lookup (table, (struct prefix *) p); | |
642 | ||
643 | /* No route for this prefix. */ | |
644 | if (! rn) | |
645 | return NULL; | |
646 | ||
647 | /* Unlock node. */ | |
648 | route_unlock_node (rn); | |
649 | ||
9fd92e3c | 650 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
651 | { |
652 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
653 | continue; | |
654 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
655 | break; | |
656 | } | |
718e3744 | 657 | |
658 | if (! match || match->type == ZEBRA_ROUTE_BGP) | |
659 | return NULL; | |
660 | ||
661 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
662 | return match; | |
663 | ||
664 | for (nexthop = match->nexthop; nexthop; nexthop = nexthop->next) | |
665 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
666 | return match; | |
667 | ||
668 | return NULL; | |
669 | } | |
670 | ||
dc95824a DO |
671 | /* |
672 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
673 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
674 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
675 | * | |
676 | * Return values: | |
677 | * -1: error | |
678 | * 0: exact match found | |
679 | * 1: a match was found with a different gate | |
680 | * 2: connected route found | |
681 | * 3: no matches found | |
682 | */ | |
683 | int | |
684 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate) | |
685 | { | |
686 | struct route_table *table; | |
687 | struct route_node *rn; | |
688 | struct rib *match; | |
689 | struct nexthop *nexthop; | |
690 | ||
691 | /* Lookup table. */ | |
692 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
693 | if (! table) | |
694 | return ZEBRA_RIB_LOOKUP_ERROR; | |
695 | ||
696 | /* Scan the RIB table for exactly matching RIB entry. */ | |
697 | rn = route_node_lookup (table, (struct prefix *) p); | |
698 | ||
699 | /* No route for this prefix. */ | |
700 | if (! rn) | |
701 | return ZEBRA_RIB_NOTFOUND; | |
702 | ||
703 | /* Unlock node. */ | |
704 | route_unlock_node (rn); | |
705 | ||
706 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 707 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
708 | { |
709 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
710 | continue; | |
711 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
712 | break; | |
713 | } | |
dc95824a DO |
714 | |
715 | /* None such found :( */ | |
716 | if (!match) | |
717 | return ZEBRA_RIB_NOTFOUND; | |
718 | ||
719 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
720 | return ZEBRA_RIB_FOUND_CONNECTED; | |
721 | ||
722 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
723 | for (nexthop = match->nexthop; nexthop; nexthop = nexthop->next) | |
724 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
725 | { | |
726 | /* We are happy with either direct or recursive hexthop */ | |
12829328 JBD |
727 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate) || |
728 | nexthop->rgate.ipv4.s_addr == sockunion2ip (qgate)) | |
dc95824a DO |
729 | return ZEBRA_RIB_FOUND_EXACT; |
730 | else | |
731 | { | |
732 | if (IS_ZEBRA_DEBUG_RIB) | |
733 | { | |
734 | char gate_buf[INET_ADDRSTRLEN], rgate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
735 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
736 | inet_ntop (AF_INET, &nexthop->rgate.ipv4.s_addr, rgate_buf, INET_ADDRSTRLEN); | |
12829328 | 737 | inet_ntop (AF_INET, &sockunion2ip (qgate), qgate_buf, INET_ADDRSTRLEN); |
dc95824a DO |
738 | zlog_debug ("%s: qgate == %s, gate == %s, rgate == %s", __func__, qgate_buf, gate_buf, rgate_buf); |
739 | } | |
740 | return ZEBRA_RIB_FOUND_NOGATE; | |
741 | } | |
742 | } | |
743 | ||
744 | return ZEBRA_RIB_NOTFOUND; | |
745 | } | |
746 | ||
718e3744 | 747 | #ifdef HAVE_IPV6 |
748 | struct rib * | |
749 | rib_match_ipv6 (struct in6_addr *addr) | |
750 | { | |
751 | struct prefix_ipv6 p; | |
752 | struct route_table *table; | |
753 | struct route_node *rn; | |
754 | struct rib *match; | |
755 | struct nexthop *newhop; | |
756 | ||
757 | /* Lookup table. */ | |
758 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
759 | if (! table) | |
760 | return 0; | |
761 | ||
762 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
763 | p.family = AF_INET6; | |
764 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
765 | IPV6_ADDR_COPY (&p.prefix, addr); | |
766 | ||
767 | rn = route_node_match (table, (struct prefix *) &p); | |
768 | ||
769 | while (rn) | |
770 | { | |
771 | route_unlock_node (rn); | |
772 | ||
773 | /* Pick up selected route. */ | |
9fd92e3c | 774 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
775 | { |
776 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
777 | continue; | |
778 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
779 | break; | |
780 | } | |
718e3744 | 781 | |
782 | /* If there is no selected route or matched route is EGP, go up | |
783 | tree. */ | |
784 | if (! match | |
785 | || match->type == ZEBRA_ROUTE_BGP) | |
786 | { | |
787 | do { | |
788 | rn = rn->parent; | |
789 | } while (rn && rn->info == NULL); | |
790 | if (rn) | |
791 | route_lock_node (rn); | |
792 | } | |
793 | else | |
794 | { | |
795 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
796 | /* Directly point connected route. */ | |
797 | return match; | |
798 | else | |
799 | { | |
800 | for (newhop = match->nexthop; newhop; newhop = newhop->next) | |
801 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
802 | return match; | |
803 | return NULL; | |
804 | } | |
805 | } | |
806 | } | |
807 | return NULL; | |
808 | } | |
809 | #endif /* HAVE_IPV6 */ | |
810 | ||
7514fb77 PJ |
811 | #define RIB_SYSTEM_ROUTE(R) \ |
812 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
813 | ||
dc95824a DO |
814 | /* This function verifies reachability of one given nexthop, which can be |
815 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
816 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
817 | * nexthop->ifindex will be updated appropriately as well. | |
818 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
819 | * not vice versa. | |
820 | * | |
821 | * The return value is the final value of 'ACTIVE' flag. | |
822 | */ | |
823 | ||
d02c56cd | 824 | static unsigned |
718e3744 | 825 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
826 | struct nexthop *nexthop, int set) | |
827 | { | |
828 | struct interface *ifp; | |
7514fb77 PJ |
829 | route_map_result_t ret = RMAP_MATCH; |
830 | extern char *proto_rm[AFI_MAX][ZEBRA_ROUTE_MAX+1]; | |
831 | struct route_map *rmap; | |
832 | int family; | |
718e3744 | 833 | |
7514fb77 | 834 | family = 0; |
718e3744 | 835 | switch (nexthop->type) |
836 | { | |
837 | case NEXTHOP_TYPE_IFINDEX: | |
838 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 839 | if (ifp && if_is_operative(ifp)) |
718e3744 | 840 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
841 | else | |
842 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
843 | break; | |
718e3744 | 844 | case NEXTHOP_TYPE_IPV6_IFNAME: |
7514fb77 PJ |
845 | family = AFI_IP6; |
846 | case NEXTHOP_TYPE_IFNAME: | |
718e3744 | 847 | ifp = if_lookup_by_name (nexthop->ifname); |
3f087670 | 848 | if (ifp && if_is_operative(ifp)) |
718e3744 | 849 | { |
850 | if (set) | |
851 | nexthop->ifindex = ifp->ifindex; | |
852 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
853 | } | |
854 | else | |
855 | { | |
856 | if (set) | |
857 | nexthop->ifindex = 0; | |
858 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
859 | } | |
860 | break; | |
861 | case NEXTHOP_TYPE_IPV4: | |
862 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 863 | family = AFI_IP; |
718e3744 | 864 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
865 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
866 | else | |
867 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
868 | break; | |
869 | #ifdef HAVE_IPV6 | |
870 | case NEXTHOP_TYPE_IPV6: | |
7514fb77 | 871 | family = AFI_IP6; |
718e3744 | 872 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
873 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
874 | else | |
875 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
876 | break; | |
877 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
7514fb77 | 878 | family = AFI_IP6; |
718e3744 | 879 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
880 | { | |
881 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 882 | if (ifp && if_is_operative(ifp)) |
718e3744 | 883 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
884 | else | |
885 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
886 | } | |
887 | else | |
888 | { | |
889 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
890 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
891 | else | |
892 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
893 | } | |
894 | break; | |
895 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 896 | case NEXTHOP_TYPE_BLACKHOLE: |
897 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
898 | break; | |
718e3744 | 899 | default: |
900 | break; | |
901 | } | |
7514fb77 PJ |
902 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
903 | return 0; | |
904 | ||
905 | if (RIB_SYSTEM_ROUTE(rib) || | |
906 | (family == AFI_IP && rn->p.family != AF_INET) || | |
907 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
908 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
909 | ||
910 | rmap = 0; | |
911 | if (rib->type >= 0 && rib->type < ZEBRA_ROUTE_MAX && | |
912 | proto_rm[family][rib->type]) | |
913 | rmap = route_map_lookup_by_name (proto_rm[family][rib->type]); | |
914 | if (!rmap && proto_rm[family][ZEBRA_ROUTE_MAX]) | |
915 | rmap = route_map_lookup_by_name (proto_rm[family][ZEBRA_ROUTE_MAX]); | |
916 | if (rmap) { | |
917 | ret = route_map_apply(rmap, &rn->p, RMAP_ZEBRA, nexthop); | |
918 | } | |
919 | ||
920 | if (ret == RMAP_DENYMATCH) | |
921 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
718e3744 | 922 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
923 | } | |
924 | ||
03e232a4 DO |
925 | /* Iterate over all nexthops of the given RIB entry and refresh their |
926 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
927 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
928 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
929 | * transparently passed to nexthop_active_check(). | |
930 | * | |
931 | * Return value is the new number of active nexthops. | |
932 | */ | |
933 | ||
a1ac18c4 | 934 | static int |
718e3744 | 935 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
936 | { | |
937 | struct nexthop *nexthop; | |
d02c56cd | 938 | unsigned int prev_active, prev_index, new_active; |
718e3744 | 939 | |
940 | rib->nexthop_active_num = 0; | |
941 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
942 | ||
943 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 DO |
944 | { |
945 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3a56063 | 946 | prev_index = nexthop->ifindex; |
03e232a4 DO |
947 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
948 | rib->nexthop_active_num++; | |
c3a56063 JT |
949 | if (prev_active != new_active || |
950 | prev_index != nexthop->ifindex) | |
03e232a4 DO |
951 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); |
952 | } | |
718e3744 | 953 | return rib->nexthop_active_num; |
954 | } | |
6baeb988 | 955 | |
718e3744 | 956 | \f |
718e3744 | 957 | |
a1ac18c4 | 958 | static void |
718e3744 | 959 | rib_install_kernel (struct route_node *rn, struct rib *rib) |
960 | { | |
961 | int ret = 0; | |
962 | struct nexthop *nexthop; | |
963 | ||
964 | switch (PREFIX_FAMILY (&rn->p)) | |
965 | { | |
966 | case AF_INET: | |
967 | ret = kernel_add_ipv4 (&rn->p, rib); | |
968 | break; | |
969 | #ifdef HAVE_IPV6 | |
970 | case AF_INET6: | |
971 | ret = kernel_add_ipv6 (&rn->p, rib); | |
972 | break; | |
973 | #endif /* HAVE_IPV6 */ | |
974 | } | |
975 | ||
dc95824a | 976 | /* This condition is never met, if we are using rt_socket.c */ |
718e3744 | 977 | if (ret < 0) |
978 | { | |
979 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
980 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
981 | } | |
982 | } | |
983 | ||
984 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 985 | static int |
718e3744 | 986 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
987 | { | |
988 | int ret = 0; | |
989 | struct nexthop *nexthop; | |
990 | ||
991 | switch (PREFIX_FAMILY (&rn->p)) | |
992 | { | |
993 | case AF_INET: | |
994 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
995 | break; | |
996 | #ifdef HAVE_IPV6 | |
997 | case AF_INET6: | |
998 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
999 | break; | |
1000 | #endif /* HAVE_IPV6 */ | |
1001 | } | |
1002 | ||
1003 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1004 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1005 | ||
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1010 | static void |
718e3744 | 1011 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1012 | { | |
1013 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1014 | { | |
1015 | redistribute_delete (&rn->p, rib); | |
1016 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1017 | rib_uninstall_kernel (rn, rib); | |
1018 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1019 | } | |
1020 | } | |
1021 | ||
6d691129 PJ |
1022 | static void rib_unlink (struct route_node *, struct rib *); |
1023 | ||
9fd92e3c AS |
1024 | /* |
1025 | * rib_can_delete_dest | |
1026 | * | |
1027 | * Returns TRUE if the given dest can be deleted from the table. | |
1028 | */ | |
1029 | static int | |
1030 | rib_can_delete_dest (rib_dest_t *dest) | |
1031 | { | |
1032 | if (dest->routes) | |
1033 | { | |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * rib_gc_dest | |
1042 | * | |
1043 | * Garbage collect the rib dest corresponding to the given route node | |
1044 | * if appropriate. | |
1045 | * | |
1046 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1047 | */ | |
1048 | int | |
1049 | rib_gc_dest (struct route_node *rn) | |
1050 | { | |
1051 | rib_dest_t *dest; | |
1052 | char buf[INET6_ADDRSTRLEN]; | |
1053 | ||
1054 | dest = rib_dest_from_rnode (rn); | |
1055 | if (!dest) | |
1056 | return 0; | |
1057 | ||
1058 | if (!rib_can_delete_dest (dest)) | |
1059 | return 0; | |
1060 | ||
1061 | if (IS_ZEBRA_DEBUG_RIB) | |
1062 | { | |
1063 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1064 | zlog_debug ("%s: %s/%d: removing dest from table", __func__, | |
1065 | buf, rn->p.prefixlen); | |
1066 | } | |
1067 | ||
1068 | dest->rnode = NULL; | |
1069 | XFREE (MTYPE_RIB_DEST, dest); | |
1070 | rn->info = NULL; | |
1071 | ||
1072 | /* | |
1073 | * Release the one reference that we keep on the route node. | |
1074 | */ | |
1075 | route_unlock_node (rn); | |
1076 | return 1; | |
1077 | } | |
1078 | ||
718e3744 | 1079 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1080 | static void |
1081 | rib_process (struct route_node *rn) | |
718e3744 | 1082 | { |
1083 | struct rib *rib; | |
1084 | struct rib *next; | |
1085 | struct rib *fib = NULL; | |
1086 | struct rib *select = NULL; | |
6d691129 | 1087 | struct rib *del = NULL; |
d753e9ee | 1088 | int installed = 0; |
1089 | struct nexthop *nexthop = NULL; | |
f304cb48 | 1090 | char buf[INET6_ADDRSTRLEN]; |
4d38fdb4 | 1091 | |
1092 | assert (rn); | |
1093 | ||
93bdadae | 1094 | if (IS_ZEBRA_DEBUG_RIB || IS_ZEBRA_DEBUG_RIB_Q) |
f304cb48 | 1095 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1096 | |
9fd92e3c | 1097 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1098 | { |
718e3744 | 1099 | /* Currently installed rib. */ |
1100 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1101 | { |
1102 | assert (fib == NULL); | |
1103 | fib = rib; | |
1104 | } | |
1105 | ||
1106 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, | |
1107 | * which we need to do do further work with below. | |
1108 | */ | |
1109 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1110 | { | |
1111 | if (rib != fib) | |
1112 | { | |
1113 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1114 | zlog_debug ("%s: %s/%d: rn %p, removing rib %p", __func__, |
1115 | buf, rn->p.prefixlen, rn, rib); | |
9fd92e3c | 1116 | rib_unlink (rn, rib); |
6d691129 PJ |
1117 | } |
1118 | else | |
1119 | del = rib; | |
1120 | ||
1121 | continue; | |
1122 | } | |
4d38fdb4 | 1123 | |
718e3744 | 1124 | /* Skip unreachable nexthop. */ |
1125 | if (! nexthop_active_update (rn, rib, 0)) | |
7021c425 | 1126 | continue; |
718e3744 | 1127 | |
1128 | /* Infinit distance. */ | |
1129 | if (rib->distance == DISTANCE_INFINITY) | |
7021c425 | 1130 | continue; |
718e3744 | 1131 | |
af887b51 | 1132 | /* Newly selected rib, the common case. */ |
1133 | if (!select) | |
1134 | { | |
1135 | select = rib; | |
1136 | continue; | |
1137 | } | |
1138 | ||
1139 | /* filter route selection in following order: | |
af887b51 | 1140 | * - connected beats other types |
a8d9c1f9 | 1141 | * - lower distance beats higher |
af887b51 | 1142 | * - lower metric beats higher for equal distance |
1143 | * - last, hence oldest, route wins tie break. | |
1144 | */ | |
a1038a15 | 1145 | |
1146 | /* Connected routes. Pick the last connected | |
1147 | * route of the set of lowest metric connected routes. | |
1148 | */ | |
a8d9c1f9 | 1149 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1150 | { | |
a1038a15 | 1151 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1152 | || rib->metric <= select->metric) |
a1038a15 | 1153 | select = rib; |
1154 | continue; | |
a8d9c1f9 | 1155 | } |
1156 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
1157 | continue; | |
1158 | ||
1159 | /* higher distance loses */ | |
1160 | if (rib->distance > select->distance) | |
1161 | continue; | |
1162 | ||
1163 | /* lower wins */ | |
1164 | if (rib->distance < select->distance) | |
1165 | { | |
af887b51 | 1166 | select = rib; |
a8d9c1f9 | 1167 | continue; |
1168 | } | |
1169 | ||
1170 | /* metric tie-breaks equal distance */ | |
1171 | if (rib->metric <= select->metric) | |
1172 | select = rib; | |
9fd92e3c | 1173 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1174 | |
1175 | /* After the cycle is finished, the following pointers will be set: | |
1176 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1177 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1178 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1179 | * rib --- NULL | |
1180 | */ | |
1181 | ||
1182 | /* Same RIB entry is selected. Update FIB and finish. */ | |
718e3744 | 1183 | if (select && select == fib) |
1184 | { | |
6d691129 | 1185 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1186 | zlog_debug ("%s: %s/%d: Updating existing route, select %p, fib %p", |
1187 | __func__, buf, rn->p.prefixlen, select, fib); | |
718e3744 | 1188 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1189 | { |
1190 | redistribute_delete (&rn->p, select); | |
1191 | if (! RIB_SYSTEM_ROUTE (select)) | |
1192 | rib_uninstall_kernel (rn, select); | |
718e3744 | 1193 | |
4d38fdb4 | 1194 | /* Set real nexthop. */ |
1195 | nexthop_active_update (rn, select, 1); | |
718e3744 | 1196 | |
4d38fdb4 | 1197 | if (! RIB_SYSTEM_ROUTE (select)) |
1198 | rib_install_kernel (rn, select); | |
1199 | redistribute_add (&rn->p, select); | |
1200 | } | |
d753e9ee | 1201 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1202 | { |
1203 | /* Housekeeping code to deal with | |
1204 | race conditions in kernel with linux | |
1205 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1206 | is ready to add routes. | |
1207 | This makes sure the routes are IN the kernel. | |
1208 | */ | |
1209 | ||
1210 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) | |
a3aaf5b0 | 1211 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1212 | { |
a3aaf5b0 DO |
1213 | installed = 1; |
1214 | break; | |
4d38fdb4 | 1215 | } |
1216 | if (! installed) | |
1217 | rib_install_kernel (rn, select); | |
1218 | } | |
6d691129 | 1219 | goto end; |
718e3744 | 1220 | } |
1221 | ||
dc95824a DO |
1222 | /* At this point we either haven't found the best RIB entry or it is |
1223 | * different from what we currently intend to flag with SELECTED. In both | |
1224 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1225 | */ | |
718e3744 | 1226 | if (fib) |
1227 | { | |
6d691129 | 1228 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1229 | zlog_debug ("%s: %s/%d: Removing existing route, fib %p", __func__, |
1230 | buf, rn->p.prefixlen, fib); | |
718e3744 | 1231 | redistribute_delete (&rn->p, fib); |
1232 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1233 | rib_uninstall_kernel (rn, fib); | |
1234 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1235 | ||
1236 | /* Set real nexthop. */ | |
1237 | nexthop_active_update (rn, fib, 1); | |
1238 | } | |
1239 | ||
dc95824a DO |
1240 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1241 | * tell, that if a new winner exists, FIB is still not updated with this | |
1242 | * data, but ready to be. | |
1243 | */ | |
718e3744 | 1244 | if (select) |
1245 | { | |
6d691129 | 1246 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1247 | zlog_debug ("%s: %s/%d: Adding route, select %p", __func__, buf, |
1248 | rn->p.prefixlen, select); | |
718e3744 | 1249 | /* Set real nexthop. */ |
1250 | nexthop_active_update (rn, select, 1); | |
1251 | ||
1252 | if (! RIB_SYSTEM_ROUTE (select)) | |
4d38fdb4 | 1253 | rib_install_kernel (rn, select); |
718e3744 | 1254 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1255 | redistribute_add (&rn->p, select); | |
1256 | } | |
4d38fdb4 | 1257 | |
6d691129 PJ |
1258 | /* FIB route was removed, should be deleted */ |
1259 | if (del) | |
1260 | { | |
1261 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1262 | zlog_debug ("%s: %s/%d: Deleting fib %p, rn %p", __func__, buf, |
1263 | rn->p.prefixlen, del, rn); | |
6d691129 PJ |
1264 | rib_unlink (rn, del); |
1265 | } | |
4d38fdb4 | 1266 | |
6d691129 PJ |
1267 | end: |
1268 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
93bdadae | 1269 | zlog_debug ("%s: %s/%d: rn %p dequeued", __func__, buf, rn->p.prefixlen, rn); |
9fd92e3c AS |
1270 | |
1271 | /* | |
1272 | * Check if the dest can be deleted now. | |
1273 | */ | |
1274 | rib_gc_dest (rn); | |
e96f9203 DO |
1275 | } |
1276 | ||
5110a0c6 SH |
1277 | /* Take a list of route_node structs and return 1, if there was a record |
1278 | * picked from it and processed by rib_process(). Don't process more, | |
1279 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1280 | */ |
ef9b113e | 1281 | static unsigned int |
e96f9203 DO |
1282 | process_subq (struct list * subq, u_char qindex) |
1283 | { | |
5110a0c6 | 1284 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1285 | struct route_node *rnode; |
5110a0c6 SH |
1286 | |
1287 | if (!lnode) | |
e96f9203 | 1288 | return 0; |
5110a0c6 | 1289 | |
e96f9203 DO |
1290 | rnode = listgetdata (lnode); |
1291 | rib_process (rnode); | |
5110a0c6 | 1292 | |
9fd92e3c AS |
1293 | if (rnode->info) |
1294 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1295 | ||
67b9467f | 1296 | #if 0 |
5110a0c6 SH |
1297 | else |
1298 | { | |
1299 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1300 | __func__, rnode, rnode->lock); | |
1301 | zlog_backtrace(LOG_DEBUG); | |
1302 | } | |
67b9467f | 1303 | #endif |
e96f9203 DO |
1304 | route_unlock_node (rnode); |
1305 | list_delete_node (subq, lnode); | |
1306 | return 1; | |
1307 | } | |
1308 | ||
1309 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from | |
1310 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1311 | * is pointed to the meta queue structure. | |
1312 | */ | |
1313 | static wq_item_status | |
1314 | meta_queue_process (struct work_queue *dummy, void *data) | |
1315 | { | |
1316 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1317 | unsigned i; |
1318 | ||
e96f9203 DO |
1319 | for (i = 0; i < MQ_SIZE; i++) |
1320 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1321 | { |
1322 | mq->size--; | |
1323 | break; | |
1324 | } | |
e96f9203 DO |
1325 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1326 | } | |
1327 | ||
9fd92e3c AS |
1328 | /* |
1329 | * Map from rib types to queue type (priority) in meta queue | |
1330 | */ | |
5110a0c6 SH |
1331 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1332 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1333 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1334 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1335 | [ZEBRA_ROUTE_STATIC] = 1, | |
1336 | [ZEBRA_ROUTE_RIP] = 2, | |
1337 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1338 | [ZEBRA_ROUTE_OSPF] = 2, | |
1339 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1340 | [ZEBRA_ROUTE_ISIS] = 2, | |
1341 | [ZEBRA_ROUTE_BGP] = 3, | |
1342 | [ZEBRA_ROUTE_HSLS] = 4, | |
5734509c | 1343 | [ZEBRA_ROUTE_BABEL] = 2, |
5110a0c6 SH |
1344 | }; |
1345 | ||
1346 | /* Look into the RN and queue it into one or more priority queues, | |
1347 | * increasing the size for each data push done. | |
e96f9203 | 1348 | */ |
ef9b113e SH |
1349 | static void |
1350 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1351 | { |
e96f9203 DO |
1352 | struct rib *rib; |
1353 | char buf[INET6_ADDRSTRLEN]; | |
5110a0c6 | 1354 | |
e96f9203 DO |
1355 | if (IS_ZEBRA_DEBUG_RIB_Q) |
1356 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
5110a0c6 | 1357 | |
9fd92e3c | 1358 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1359 | { |
5110a0c6 SH |
1360 | u_char qindex = meta_queue_map[rib->type]; |
1361 | ||
1362 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1363 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1364 | RIB_ROUTE_QUEUED (qindex))) | |
5110a0c6 SH |
1365 | { |
1366 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1367 | zlog_debug ("%s: %s/%d: rn %p is already queued in sub-queue %u", | |
1368 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
1369 | continue; | |
1370 | } | |
1371 | ||
9fd92e3c | 1372 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1373 | listnode_add (mq->subq[qindex], rn); |
1374 | route_lock_node (rn); | |
1375 | mq->size++; | |
1376 | ||
e96f9203 | 1377 | if (IS_ZEBRA_DEBUG_RIB_Q) |
5110a0c6 SH |
1378 | zlog_debug ("%s: %s/%d: queued rn %p into sub-queue %u", |
1379 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
e96f9203 | 1380 | } |
4d38fdb4 | 1381 | } |
1382 | ||
6d691129 | 1383 | /* Add route_node to work queue and schedule processing */ |
a1ac18c4 | 1384 | static void |
6d691129 | 1385 | rib_queue_add (struct zebra_t *zebra, struct route_node *rn) |
4d38fdb4 | 1386 | { |
fc328ac9 SV |
1387 | char buf[INET_ADDRSTRLEN]; |
1388 | assert (zebra && rn); | |
4d38fdb4 | 1389 | |
93bdadae | 1390 | if (IS_ZEBRA_DEBUG_RIB_Q) |
fc328ac9 SV |
1391 | inet_ntop (AF_INET, &rn->p.u.prefix, buf, INET_ADDRSTRLEN); |
1392 | ||
1393 | /* Pointless to queue a route_node with no RIB entries to add or remove */ | |
9fd92e3c | 1394 | if (!rnode_to_ribs (rn)) |
6d691129 | 1395 | { |
fc328ac9 SV |
1396 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
1397 | __func__, rn, rn->lock); | |
1398 | zlog_backtrace(LOG_DEBUG); | |
1399 | return; | |
1400 | } | |
1401 | ||
1402 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1403 | zlog_info ("%s: %s/%d: work queue added", __func__, buf, rn->p.prefixlen); | |
1404 | ||
1405 | assert (zebra); | |
4d38fdb4 | 1406 | |
fc328ac9 SV |
1407 | if (zebra->ribq == NULL) |
1408 | { | |
1409 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1410 | return; | |
4d38fdb4 | 1411 | } |
4d38fdb4 | 1412 | |
cc2dd928 SH |
1413 | /* |
1414 | * The RIB queue should normally be either empty or holding the only | |
1415 | * work_queue_item element. In the latter case this element would | |
1416 | * hold a pointer to the meta queue structure, which must be used to | |
1417 | * actually queue the route nodes to process. So create the MQ | |
1418 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1419 | * This semantics was introduced after 0.99.9 release. |
1420 | */ | |
e96f9203 DO |
1421 | if (!zebra->ribq->items->count) |
1422 | work_queue_add (zebra->ribq, zebra->mq); | |
1423 | ||
1424 | rib_meta_queue_add (zebra->mq, rn); | |
fc328ac9 SV |
1425 | |
1426 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1427 | zlog_debug ("%s: %s/%d: rn %p queued", __func__, buf, rn->p.prefixlen, rn); | |
1428 | ||
1429 | return; | |
4d38fdb4 | 1430 | } |
1431 | ||
5110a0c6 SH |
1432 | /* Create new meta queue. |
1433 | A destructor function doesn't seem to be necessary here. | |
1434 | */ | |
ef9b113e SH |
1435 | static struct meta_queue * |
1436 | meta_queue_new (void) | |
e96f9203 DO |
1437 | { |
1438 | struct meta_queue *new; | |
5110a0c6 SH |
1439 | unsigned i; |
1440 | ||
1441 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1442 | assert(new); | |
e96f9203 | 1443 | |
e96f9203 | 1444 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1445 | { |
1446 | new->subq[i] = list_new (); | |
1447 | assert(new->subq[i]); | |
1448 | } | |
1449 | ||
e96f9203 DO |
1450 | return new; |
1451 | } | |
1452 | ||
4d38fdb4 | 1453 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1454 | static void |
4d38fdb4 | 1455 | rib_queue_init (struct zebra_t *zebra) |
1456 | { | |
fc328ac9 SV |
1457 | assert (zebra); |
1458 | ||
4d38fdb4 | 1459 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 1460 | "route_node processing"))) |
4d38fdb4 | 1461 | { |
6d691129 | 1462 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 1463 | return; |
1464 | } | |
1465 | ||
1466 | /* fill in the work queue spec */ | |
e96f9203 | 1467 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 1468 | zebra->ribq->spec.errorfunc = NULL; |
4d38fdb4 | 1469 | /* XXX: TODO: These should be runtime configurable via vty */ |
1470 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 1471 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 1472 | |
e96f9203 | 1473 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 1474 | { |
e96f9203 | 1475 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
1476 | return; |
1477 | } | |
1478 | return; | |
718e3744 | 1479 | } |
1480 | ||
6d691129 PJ |
1481 | /* RIB updates are processed via a queue of pointers to route_nodes. |
1482 | * | |
1483 | * The queue length is bounded by the maximal size of the routing table, | |
1484 | * as a route_node will not be requeued, if already queued. | |
1485 | * | |
3c0755dc PJ |
1486 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
1487 | * state, or static_install_ipv{4,6} (when an existing RIB is updated) | |
1488 | * and then submit route_node to queue for best-path selection later. | |
1489 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
1490 | * |
1491 | * Deleted RIBs are reaped during best-path selection. | |
1492 | * | |
1493 | * rib_addnode | |
1494 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
1495 | * |-------->| | best RIB, if required |
1496 | * | | | |
1497 | * static_install->|->rib_addqueue...... -> rib_process | |
1498 | * | | | |
1499 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
1500 | * |-> set RIB_ENTRY_REMOVE | |
1501 | * rib_delnode (RIB freed) | |
1502 | * | |
9fd92e3c AS |
1503 | * The 'info' pointer of a route_node points to a rib_dest_t |
1504 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
1505 | * dest is created on-demand by rib_link() and is kept around at least | |
1506 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
1507 | * |
1508 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
1509 | * | |
1510 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
1511 | * - dest attached to route_node: |
1512 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
1513 | * - route_node processing queue |
1514 | * - managed by: rib_addqueue, rib_process. | |
1515 | * | |
1516 | */ | |
1517 | ||
718e3744 | 1518 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 1519 | static void |
6d691129 | 1520 | rib_link (struct route_node *rn, struct rib *rib) |
718e3744 | 1521 | { |
1522 | struct rib *head; | |
9fd92e3c | 1523 | rib_dest_t *dest; |
f304cb48 | 1524 | char buf[INET6_ADDRSTRLEN]; |
9fd92e3c | 1525 | |
4d38fdb4 | 1526 | assert (rib && rn); |
1527 | ||
6d691129 | 1528 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 1529 | { |
f304cb48 | 1530 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
1531 | zlog_debug ("%s: %s/%d: rn %p, rib %p", __func__, |
1532 | buf, rn->p.prefixlen, rn, rib); | |
1533 | } | |
6d691129 | 1534 | |
9fd92e3c AS |
1535 | dest = rib_dest_from_rnode (rn); |
1536 | if (!dest) | |
6d691129 PJ |
1537 | { |
1538 | if (IS_ZEBRA_DEBUG_RIB) | |
9fd92e3c AS |
1539 | { |
1540 | zlog_debug ("%s: %s/%d: adding dest to table", __func__, | |
1541 | buf, rn->p.prefixlen); | |
1542 | } | |
1543 | ||
1544 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
1545 | route_lock_node (rn); /* rn route table reference */ | |
1546 | rn->info = dest; | |
1547 | dest->rnode = rn; | |
1548 | } | |
1549 | ||
1550 | head = dest->routes; | |
1551 | if (head) | |
1552 | { | |
6d691129 | 1553 | head->prev = rib; |
6d691129 | 1554 | } |
718e3744 | 1555 | rib->next = head; |
9fd92e3c | 1556 | dest->routes = rib; |
6d691129 | 1557 | rib_queue_add (&zebrad, rn); |
718e3744 | 1558 | } |
1559 | ||
a1ac18c4 | 1560 | static void |
6d691129 | 1561 | rib_addnode (struct route_node *rn, struct rib *rib) |
718e3744 | 1562 | { |
6d691129 PJ |
1563 | /* RIB node has been un-removed before route-node is processed. |
1564 | * route_node must hence already be on the queue for processing.. | |
1565 | */ | |
1566 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1567 | { | |
1568 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1569 | { |
f304cb48 DO |
1570 | char buf[INET6_ADDRSTRLEN]; |
1571 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
1572 | zlog_debug ("%s: %s/%d: rn %p, un-removed rib %p", |
1573 | __func__, buf, rn->p.prefixlen, rn, rib); | |
1574 | } | |
6d691129 PJ |
1575 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
1576 | return; | |
1577 | } | |
1578 | rib_link (rn, rib); | |
1579 | } | |
1580 | ||
9fd92e3c AS |
1581 | /* |
1582 | * rib_unlink | |
1583 | * | |
1584 | * Detach a rib structure from a route_node. | |
1585 | * | |
1586 | * Note that a call to rib_unlink() should be followed by a call to | |
1587 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
1588 | * longer required to be deleted. | |
1589 | */ | |
6d691129 PJ |
1590 | static void |
1591 | rib_unlink (struct route_node *rn, struct rib *rib) | |
1592 | { | |
1593 | struct nexthop *nexthop, *next; | |
f304cb48 | 1594 | char buf[INET6_ADDRSTRLEN]; |
9fd92e3c | 1595 | rib_dest_t *dest; |
6d691129 | 1596 | |
4d38fdb4 | 1597 | assert (rn && rib); |
6d691129 PJ |
1598 | |
1599 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1600 | { |
f304cb48 | 1601 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
1602 | zlog_debug ("%s: %s/%d: rn %p, rib %p", |
1603 | __func__, buf, rn->p.prefixlen, rn, rib); | |
1604 | } | |
6d691129 | 1605 | |
9fd92e3c AS |
1606 | dest = rib_dest_from_rnode (rn); |
1607 | ||
718e3744 | 1608 | if (rib->next) |
1609 | rib->next->prev = rib->prev; | |
6d691129 | 1610 | |
718e3744 | 1611 | if (rib->prev) |
1612 | rib->prev->next = rib->next; | |
1613 | else | |
6d691129 | 1614 | { |
9fd92e3c | 1615 | dest->routes = rib->next; |
6d691129 PJ |
1616 | } |
1617 | ||
1618 | /* free RIB and nexthops */ | |
1619 | for (nexthop = rib->nexthop; nexthop; nexthop = next) | |
1620 | { | |
1621 | next = nexthop->next; | |
1622 | nexthop_free (nexthop); | |
1623 | } | |
1624 | XFREE (MTYPE_RIB, rib); | |
1625 | ||
6d691129 PJ |
1626 | } |
1627 | ||
1628 | static void | |
1629 | rib_delnode (struct route_node *rn, struct rib *rib) | |
1630 | { | |
1631 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 1632 | { |
f304cb48 DO |
1633 | char buf[INET6_ADDRSTRLEN]; |
1634 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
1635 | zlog_debug ("%s: %s/%d: rn %p, rib %p, removing", __func__, |
1636 | buf, rn->p.prefixlen, rn, rib); | |
1637 | } | |
6d691129 PJ |
1638 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
1639 | rib_queue_add (&zebrad, rn); | |
718e3744 | 1640 | } |
1641 | ||
1642 | int | |
1643 | rib_add_ipv4 (int type, int flags, struct prefix_ipv4 *p, | |
7514fb77 PJ |
1644 | struct in_addr *gate, struct in_addr *src, |
1645 | unsigned int ifindex, u_int32_t vrf_id, | |
cddf391b | 1646 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 1647 | { |
1648 | struct rib *rib; | |
1649 | struct rib *same = NULL; | |
1650 | struct route_table *table; | |
1651 | struct route_node *rn; | |
1652 | struct nexthop *nexthop; | |
1653 | ||
1654 | /* Lookup table. */ | |
cddf391b | 1655 | table = vrf_table (AFI_IP, safi, 0); |
718e3744 | 1656 | if (! table) |
1657 | return 0; | |
1658 | ||
1659 | /* Make it sure prefixlen is applied to the prefix. */ | |
1660 | apply_mask_ipv4 (p); | |
1661 | ||
1662 | /* Set default distance by route type. */ | |
1663 | if (distance == 0) | |
1664 | { | |
837d16cc | 1665 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
1666 | distance = 150; |
1667 | else | |
1668 | distance = route_info[type].distance; | |
718e3744 | 1669 | |
1670 | /* iBGP distance is 200. */ | |
1671 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
1672 | distance = 200; | |
1673 | } | |
1674 | ||
1675 | /* Lookup route node.*/ | |
1676 | rn = route_node_get (table, (struct prefix *) p); | |
1677 | ||
1678 | /* If same type of route are installed, treat it as a implicit | |
1679 | withdraw. */ | |
9fd92e3c | 1680 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 1681 | { |
6d691129 PJ |
1682 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
1683 | continue; | |
1684 | ||
ebf1ead0 | 1685 | if (rib->type != type) |
1686 | continue; | |
1687 | if (rib->type != ZEBRA_ROUTE_CONNECT) | |
4d38fdb4 | 1688 | { |
1689 | same = rib; | |
1690 | break; | |
1691 | } | |
ebf1ead0 | 1692 | /* Duplicate connected route comes in. */ |
1693 | else if ((nexthop = rib->nexthop) && | |
1694 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
1695 | nexthop->ifindex == ifindex && |
1696 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 1697 | { |
1698 | rib->refcnt++; | |
1699 | return 0 ; | |
1700 | } | |
718e3744 | 1701 | } |
1702 | ||
1703 | /* Allocate new rib structure. */ | |
4d38fdb4 | 1704 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 1705 | rib->type = type; |
1706 | rib->distance = distance; | |
1707 | rib->flags = flags; | |
1708 | rib->metric = metric; | |
b5f45021 | 1709 | rib->table = vrf_id; |
718e3744 | 1710 | rib->nexthop_num = 0; |
1711 | rib->uptime = time (NULL); | |
1712 | ||
1713 | /* Nexthop settings. */ | |
1714 | if (gate) | |
1715 | { | |
1716 | if (ifindex) | |
7514fb77 | 1717 | nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 1718 | else |
7514fb77 | 1719 | nexthop_ipv4_add (rib, gate, src); |
718e3744 | 1720 | } |
1721 | else | |
1722 | nexthop_ifindex_add (rib, ifindex); | |
1723 | ||
1724 | /* If this route is kernel route, set FIB flag to the route. */ | |
1725 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
1726 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1727 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1728 | ||
1729 | /* Link new rib to node.*/ | |
dc95824a DO |
1730 | if (IS_ZEBRA_DEBUG_RIB) |
1731 | zlog_debug ("%s: calling rib_addnode (%p, %p)", __func__, rn, rib); | |
718e3744 | 1732 | rib_addnode (rn, rib); |
4d38fdb4 | 1733 | |
718e3744 | 1734 | /* Free implicit route.*/ |
1735 | if (same) | |
dc95824a DO |
1736 | { |
1737 | if (IS_ZEBRA_DEBUG_RIB) | |
1738 | zlog_debug ("%s: calling rib_delnode (%p, %p)", __func__, rn, rib); | |
4d38fdb4 | 1739 | rib_delnode (rn, same); |
dc95824a | 1740 | } |
4d38fdb4 | 1741 | |
1742 | route_unlock_node (rn); | |
718e3744 | 1743 | return 0; |
1744 | } | |
1745 | ||
dc95824a DO |
1746 | /* This function dumps the contents of a given RIB entry into |
1747 | * standard debug log. Calling function name and IP prefix in | |
1748 | * question are passed as 1st and 2nd arguments. | |
1749 | */ | |
1750 | ||
1751 | void rib_dump (const char * func, const struct prefix_ipv4 * p, const struct rib * rib) | |
1752 | { | |
1753 | char straddr1[INET_ADDRSTRLEN], straddr2[INET_ADDRSTRLEN]; | |
1754 | struct nexthop *nexthop; | |
1755 | ||
1756 | inet_ntop (AF_INET, &p->prefix, straddr1, INET_ADDRSTRLEN); | |
1757 | zlog_debug ("%s: dumping RIB entry %p for %s/%d", func, rib, straddr1, p->prefixlen); | |
1758 | zlog_debug | |
1759 | ( | |
d02c56cd | 1760 | "%s: refcnt == %lu, uptime == %lu, type == %u, table == %d", |
dc95824a DO |
1761 | func, |
1762 | rib->refcnt, | |
d02c56cd | 1763 | (unsigned long) rib->uptime, |
dc95824a DO |
1764 | rib->type, |
1765 | rib->table | |
1766 | ); | |
1767 | zlog_debug | |
1768 | ( | |
1769 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
1770 | func, | |
1771 | rib->metric, | |
1772 | rib->distance, | |
1773 | rib->flags, | |
1774 | rib->status | |
1775 | ); | |
1776 | zlog_debug | |
1777 | ( | |
1778 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
1779 | func, | |
1780 | rib->nexthop_num, | |
1781 | rib->nexthop_active_num, | |
1782 | rib->nexthop_fib_num | |
1783 | ); | |
1784 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1785 | { | |
1786 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, straddr1, INET_ADDRSTRLEN); | |
1787 | inet_ntop (AF_INET, &nexthop->rgate.ipv4.s_addr, straddr2, INET_ADDRSTRLEN); | |
1788 | zlog_debug | |
1789 | ( | |
1790 | "%s: NH %s (%s) with flags %s%s%s", | |
1791 | func, | |
1792 | straddr1, | |
1793 | straddr2, | |
1794 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
1795 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
1796 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
1797 | ); | |
1798 | } | |
1799 | zlog_debug ("%s: dump complete", func); | |
1800 | } | |
1801 | ||
1802 | /* This is an exported helper to rtm_read() to dump the strange | |
1803 | * RIB entry found by rib_lookup_ipv4_route() | |
1804 | */ | |
1805 | ||
1806 | void rib_lookup_and_dump (struct prefix_ipv4 * p) | |
1807 | { | |
1808 | struct route_table *table; | |
1809 | struct route_node *rn; | |
1810 | struct rib *rib; | |
1811 | char prefix_buf[INET_ADDRSTRLEN]; | |
1812 | ||
1813 | /* Lookup table. */ | |
1814 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1815 | if (! table) | |
1816 | { | |
1817 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
1818 | return; | |
1819 | } | |
1820 | ||
1821 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
1822 | /* Scan the RIB table for exactly matching RIB entry. */ | |
1823 | rn = route_node_lookup (table, (struct prefix *) p); | |
1824 | ||
1825 | /* No route for this prefix. */ | |
1826 | if (! rn) | |
1827 | { | |
1828 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
1829 | return; | |
1830 | } | |
1831 | ||
1832 | /* Unlock node. */ | |
1833 | route_unlock_node (rn); | |
1834 | ||
1835 | /* let's go */ | |
9fd92e3c | 1836 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
1837 | { |
1838 | zlog_debug | |
1839 | ( | |
1840 | "%s: rn %p, rib %p: %s, %s", | |
1841 | __func__, | |
1842 | rn, | |
1843 | rib, | |
1844 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
1845 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
1846 | ); | |
1847 | rib_dump (__func__, p, rib); | |
1848 | } | |
1849 | } | |
1850 | ||
20e5ff0a DO |
1851 | /* Check if requested address assignment will fail due to another |
1852 | * route being installed by zebra in FIB already. Take necessary | |
1853 | * actions, if needed: remove such a route from FIB and deSELECT | |
1854 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
1855 | */ | |
1856 | void rib_lookup_and_pushup (struct prefix_ipv4 * p) | |
1857 | { | |
1858 | struct route_table *table; | |
1859 | struct route_node *rn; | |
1860 | struct rib *rib; | |
1861 | unsigned changed = 0; | |
1862 | ||
1863 | if (NULL == (table = vrf_table (AFI_IP, SAFI_UNICAST, 0))) | |
1864 | { | |
1865 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
1866 | return; | |
1867 | } | |
1868 | ||
1869 | /* No matches would be the simplest case. */ | |
1870 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
1871 | return; | |
1872 | ||
1873 | /* Unlock node. */ | |
1874 | route_unlock_node (rn); | |
1875 | ||
1876 | /* Check all RIB entries. In case any changes have to be done, requeue | |
1877 | * the RN into RIBQ head. If the routing message about the new connected | |
1878 | * route (generated by the IP address we are going to assign very soon) | |
1879 | * comes before the RIBQ is processed, the new RIB entry will join | |
1880 | * RIBQ record already on head. This is necessary for proper revalidation | |
1881 | * of the rest of the RIB. | |
1882 | */ | |
9fd92e3c | 1883 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
1884 | { |
1885 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
1886 | ! RIB_SYSTEM_ROUTE (rib)) | |
1887 | { | |
1888 | changed = 1; | |
1889 | if (IS_ZEBRA_DEBUG_RIB) | |
1890 | { | |
1891 | char buf[INET_ADDRSTRLEN]; | |
1892 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
1893 | zlog_debug ("%s: freeing way for connected prefix %s/%d", __func__, buf, p->prefixlen); | |
1894 | rib_dump (__func__, (struct prefix_ipv4 *)&rn->p, rib); | |
1895 | } | |
1896 | rib_uninstall (rn, rib); | |
1897 | } | |
1898 | } | |
1899 | if (changed) | |
20e5ff0a | 1900 | rib_queue_add (&zebrad, rn); |
20e5ff0a DO |
1901 | } |
1902 | ||
718e3744 | 1903 | int |
cddf391b | 1904 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 1905 | { |
1906 | struct route_table *table; | |
1907 | struct route_node *rn; | |
1908 | struct rib *same; | |
1909 | struct nexthop *nexthop; | |
4d38fdb4 | 1910 | |
718e3744 | 1911 | /* Lookup table. */ |
cddf391b | 1912 | table = vrf_table (AFI_IP, safi, 0); |
718e3744 | 1913 | if (! table) |
1914 | return 0; | |
cddf391b | 1915 | |
718e3744 | 1916 | /* Make it sure prefixlen is applied to the prefix. */ |
1917 | apply_mask_ipv4 (p); | |
1918 | ||
1919 | /* Set default distance by route type. */ | |
1920 | if (rib->distance == 0) | |
1921 | { | |
1922 | rib->distance = route_info[rib->type].distance; | |
1923 | ||
1924 | /* iBGP distance is 200. */ | |
1925 | if (rib->type == ZEBRA_ROUTE_BGP | |
1926 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
1927 | rib->distance = 200; | |
1928 | } | |
1929 | ||
1930 | /* Lookup route node.*/ | |
1931 | rn = route_node_get (table, (struct prefix *) p); | |
1932 | ||
1933 | /* If same type of route are installed, treat it as a implicit | |
1934 | withdraw. */ | |
9fd92e3c | 1935 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 1936 | { |
0b8c4f1d | 1937 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
1938 | continue; |
1939 | ||
718e3744 | 1940 | if (same->type == rib->type && same->table == rib->table |
1941 | && same->type != ZEBRA_ROUTE_CONNECT) | |
4d38fdb4 | 1942 | break; |
718e3744 | 1943 | } |
4d38fdb4 | 1944 | |
718e3744 | 1945 | /* If this route is kernel route, set FIB flag to the route. */ |
1946 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
1947 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
1948 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1949 | ||
1950 | /* Link new rib to node.*/ | |
1951 | rib_addnode (rn, rib); | |
dc95824a DO |
1952 | if (IS_ZEBRA_DEBUG_RIB) |
1953 | { | |
1954 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
1955 | __func__, rn, rib); | |
1956 | rib_dump (__func__, p, rib); | |
1957 | } | |
718e3744 | 1958 | |
718e3744 | 1959 | /* Free implicit route.*/ |
1960 | if (same) | |
dc95824a DO |
1961 | { |
1962 | if (IS_ZEBRA_DEBUG_RIB) | |
1963 | { | |
1964 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
1965 | __func__, rn, same); | |
1966 | rib_dump (__func__, p, same); | |
1967 | } | |
4d38fdb4 | 1968 | rib_delnode (rn, same); |
dc95824a | 1969 | } |
4d38fdb4 | 1970 | |
1971 | route_unlock_node (rn); | |
718e3744 | 1972 | return 0; |
1973 | } | |
1974 | ||
ebf1ead0 | 1975 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 1976 | int |
1977 | rib_delete_ipv4 (int type, int flags, struct prefix_ipv4 *p, | |
cddf391b | 1978 | struct in_addr *gate, unsigned int ifindex, u_int32_t vrf_id, safi_t safi) |
718e3744 | 1979 | { |
1980 | struct route_table *table; | |
1981 | struct route_node *rn; | |
1982 | struct rib *rib; | |
1983 | struct rib *fib = NULL; | |
1984 | struct rib *same = NULL; | |
1985 | struct nexthop *nexthop; | |
81cce018 SH |
1986 | char buf1[INET_ADDRSTRLEN]; |
1987 | char buf2[INET_ADDRSTRLEN]; | |
718e3744 | 1988 | |
1989 | /* Lookup table. */ | |
cddf391b | 1990 | table = vrf_table (AFI_IP, safi, 0); |
718e3744 | 1991 | if (! table) |
1992 | return 0; | |
1993 | ||
1994 | /* Apply mask. */ | |
1995 | apply_mask_ipv4 (p); | |
1996 | ||
5ec90d28 | 1997 | if (IS_ZEBRA_DEBUG_KERNEL && gate) |
b6178002 | 1998 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", |
81cce018 | 1999 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
5ec90d28 | 2000 | p->prefixlen, |
2001 | inet_ntoa (*gate), | |
2002 | ifindex); | |
2003 | ||
718e3744 | 2004 | /* Lookup route node. */ |
2005 | rn = route_node_lookup (table, (struct prefix *) p); | |
2006 | if (! rn) | |
2007 | { | |
2008 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2009 | { | |
2010 | if (gate) | |
b6178002 | 2011 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2012 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2013 | p->prefixlen, |
81cce018 | 2014 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2015 | ifindex); |
2016 | else | |
b6178002 | 2017 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2018 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2019 | p->prefixlen, |
2020 | ifindex); | |
2021 | } | |
2022 | return ZEBRA_ERR_RTNOEXIST; | |
2023 | } | |
2024 | ||
2025 | /* Lookup same type route. */ | |
9fd92e3c | 2026 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2027 | { |
6d691129 PJ |
2028 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2029 | continue; | |
2030 | ||
718e3744 | 2031 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2032 | fib = rib; | |
2033 | ||
ebf1ead0 | 2034 | if (rib->type != type) |
2035 | continue; | |
2036 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && | |
4f1735fd | 2037 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2038 | { |
4f1735fd MF |
2039 | if (nexthop->ifindex != ifindex) |
2040 | continue; | |
ebf1ead0 | 2041 | if (rib->refcnt) |
718e3744 | 2042 | { |
ebf1ead0 | 2043 | rib->refcnt--; |
2044 | route_unlock_node (rn); | |
2045 | route_unlock_node (rn); | |
2046 | return 0; | |
718e3744 | 2047 | } |
ebf1ead0 | 2048 | same = rib; |
2049 | break; | |
718e3744 | 2050 | } |
ebf1ead0 | 2051 | /* Make sure that the route found has the same gateway. */ |
2052 | else if (gate == NULL || | |
2053 | ((nexthop = rib->nexthop) && | |
2054 | (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || | |
2055 | IPV4_ADDR_SAME (&nexthop->rgate.ipv4, gate)))) | |
5ec90d28 | 2056 | { |
ebf1ead0 | 2057 | same = rib; |
2058 | break; | |
718e3744 | 2059 | } |
2060 | } | |
2061 | ||
2062 | /* If same type of route can't be found and this message is from | |
2063 | kernel. */ | |
2064 | if (! same) | |
2065 | { | |
2066 | if (fib && type == ZEBRA_ROUTE_KERNEL) | |
2067 | { | |
2068 | /* Unset flags. */ | |
2069 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2070 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2071 | ||
2072 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2073 | } | |
2074 | else | |
2075 | { | |
2076 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2077 | { | |
2078 | if (gate) | |
b6178002 | 2079 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2080 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2081 | p->prefixlen, |
81cce018 | 2082 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2083 | ifindex, |
2084 | type); | |
2085 | else | |
b6178002 | 2086 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2087 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2088 | p->prefixlen, |
2089 | ifindex, | |
2090 | type); | |
2091 | } | |
2092 | route_unlock_node (rn); | |
2093 | return ZEBRA_ERR_RTNOEXIST; | |
2094 | } | |
2095 | } | |
4d38fdb4 | 2096 | |
718e3744 | 2097 | if (same) |
4d38fdb4 | 2098 | rib_delnode (rn, same); |
2099 | ||
718e3744 | 2100 | route_unlock_node (rn); |
718e3744 | 2101 | return 0; |
2102 | } | |
2103 | \f | |
2104 | /* Install static route into rib. */ | |
a1ac18c4 | 2105 | static void |
718e3744 | 2106 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2107 | { | |
2108 | struct rib *rib; | |
2109 | struct route_node *rn; | |
2110 | struct route_table *table; | |
2111 | ||
2112 | /* Lookup table. */ | |
2113 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2114 | if (! table) | |
2115 | return; | |
2116 | ||
2117 | /* Lookup existing route */ | |
2118 | rn = route_node_get (table, p); | |
9fd92e3c | 2119 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2120 | { |
2121 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2122 | continue; | |
2123 | ||
2124 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2125 | break; | |
2126 | } | |
718e3744 | 2127 | |
2128 | if (rib) | |
2129 | { | |
2130 | /* Same distance static route is there. Update it with new | |
2131 | nexthop. */ | |
718e3744 | 2132 | route_unlock_node (rn); |
718e3744 | 2133 | switch (si->type) |
7021c425 | 2134 | { |
2135 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2136 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
7021c425 | 2137 | break; |
2138 | case STATIC_IPV4_IFNAME: | |
2139 | nexthop_ifname_add (rib, si->gate.ifname); | |
2140 | break; | |
2141 | case STATIC_IPV4_BLACKHOLE: | |
2142 | nexthop_blackhole_add (rib); | |
2143 | break; | |
4d38fdb4 | 2144 | } |
3c0755dc | 2145 | rib_queue_add (&zebrad, rn); |
718e3744 | 2146 | } |
2147 | else | |
2148 | { | |
2149 | /* This is new static route. */ | |
4d38fdb4 | 2150 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2151 | ||
718e3744 | 2152 | rib->type = ZEBRA_ROUTE_STATIC; |
2153 | rib->distance = si->distance; | |
2154 | rib->metric = 0; | |
b0145ddb | 2155 | rib->table = zebrad.rtm_table_default; |
718e3744 | 2156 | rib->nexthop_num = 0; |
2157 | ||
2158 | switch (si->type) | |
7021c425 | 2159 | { |
2160 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2161 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
7021c425 | 2162 | break; |
2163 | case STATIC_IPV4_IFNAME: | |
2164 | nexthop_ifname_add (rib, si->gate.ifname); | |
2165 | break; | |
2166 | case STATIC_IPV4_BLACKHOLE: | |
2167 | nexthop_blackhole_add (rib); | |
2168 | break; | |
2169 | } | |
718e3744 | 2170 | |
81dfcaa2 | 2171 | /* Save the flags of this static routes (reject, blackhole) */ |
2172 | rib->flags = si->flags; | |
2173 | ||
718e3744 | 2174 | /* Link this rib to the tree. */ |
2175 | rib_addnode (rn, rib); | |
718e3744 | 2176 | } |
2177 | } | |
2178 | ||
a1ac18c4 | 2179 | static int |
718e3744 | 2180 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
2181 | { | |
2182 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2183 | && si->type == STATIC_IPV4_GATEWAY | |
2184 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
2185 | return 1; | |
2186 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2187 | && si->type == STATIC_IPV4_IFNAME | |
2188 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
2189 | return 1; | |
595db7f1 | 2190 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2191 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2192 | return 1; | |
e8e1946e | 2193 | return 0; |
718e3744 | 2194 | } |
2195 | ||
2196 | /* Uninstall static route from RIB. */ | |
a1ac18c4 | 2197 | static void |
718e3744 | 2198 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2199 | { | |
2200 | struct route_node *rn; | |
2201 | struct rib *rib; | |
2202 | struct nexthop *nexthop; | |
2203 | struct route_table *table; | |
2204 | ||
2205 | /* Lookup table. */ | |
2206 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2207 | if (! table) | |
2208 | return; | |
4d38fdb4 | 2209 | |
718e3744 | 2210 | /* Lookup existing route with type and distance. */ |
2211 | rn = route_node_lookup (table, p); | |
2212 | if (! rn) | |
2213 | return; | |
2214 | ||
9fd92e3c | 2215 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2216 | { |
2217 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2218 | continue; | |
2219 | ||
2220 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2221 | break; | |
2222 | } | |
718e3744 | 2223 | |
2224 | if (! rib) | |
2225 | { | |
2226 | route_unlock_node (rn); | |
2227 | return; | |
2228 | } | |
2229 | ||
2230 | /* Lookup nexthop. */ | |
2231 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2232 | if (static_ipv4_nexthop_same (nexthop, si)) | |
2233 | break; | |
2234 | ||
2235 | /* Can't find nexthop. */ | |
2236 | if (! nexthop) | |
2237 | { | |
2238 | route_unlock_node (rn); | |
2239 | return; | |
2240 | } | |
2241 | ||
2242 | /* Check nexthop. */ | |
2243 | if (rib->nexthop_num == 1) | |
6d691129 | 2244 | rib_delnode (rn, rib); |
718e3744 | 2245 | else |
2246 | { | |
6baeb988 | 2247 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
2248 | rib_uninstall (rn, rib); | |
319572cc | 2249 | nexthop_delete (rib, nexthop); |
2250 | nexthop_free (nexthop); | |
6d691129 | 2251 | rib_queue_add (&zebrad, rn); |
718e3744 | 2252 | } |
718e3744 | 2253 | /* Unlock node. */ |
2254 | route_unlock_node (rn); | |
2255 | } | |
2256 | ||
2257 | /* Add static route into static route configuration. */ | |
2258 | int | |
39db97e4 | 2259 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
81dfcaa2 | 2260 | u_char flags, u_char distance, u_int32_t vrf_id) |
718e3744 | 2261 | { |
2262 | u_char type = 0; | |
2263 | struct route_node *rn; | |
2264 | struct static_ipv4 *si; | |
2265 | struct static_ipv4 *pp; | |
2266 | struct static_ipv4 *cp; | |
2267 | struct static_ipv4 *update = NULL; | |
2268 | struct route_table *stable; | |
2269 | ||
2270 | /* Lookup table. */ | |
2271 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2272 | if (! stable) | |
2273 | return -1; | |
2274 | ||
2275 | /* Lookup static route prefix. */ | |
2276 | rn = route_node_get (stable, p); | |
2277 | ||
2278 | /* Make flags. */ | |
2279 | if (gate) | |
2280 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 2281 | else if (ifname) |
718e3744 | 2282 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 2283 | else |
2284 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2285 | |
2286 | /* Do nothing if there is a same static route. */ | |
2287 | for (si = rn->info; si; si = si->next) | |
2288 | { | |
2289 | if (type == si->type | |
2290 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2291 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2292 | { | |
2293 | if (distance == si->distance) | |
2294 | { | |
2295 | route_unlock_node (rn); | |
2296 | return 0; | |
2297 | } | |
2298 | else | |
2299 | update = si; | |
2300 | } | |
2301 | } | |
2302 | ||
3c0755dc | 2303 | /* Distance changed. */ |
718e3744 | 2304 | if (update) |
2305 | static_delete_ipv4 (p, gate, ifname, update->distance, vrf_id); | |
2306 | ||
2307 | /* Make new static route structure. */ | |
393deb9b | 2308 | si = XCALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
718e3744 | 2309 | |
2310 | si->type = type; | |
2311 | si->distance = distance; | |
81dfcaa2 | 2312 | si->flags = flags; |
718e3744 | 2313 | |
2314 | if (gate) | |
2315 | si->gate.ipv4 = *gate; | |
2316 | if (ifname) | |
2317 | si->gate.ifname = XSTRDUP (0, ifname); | |
2318 | ||
2319 | /* Add new static route information to the tree with sort by | |
2320 | distance value and gateway address. */ | |
2321 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2322 | { | |
2323 | if (si->distance < cp->distance) | |
2324 | break; | |
2325 | if (si->distance > cp->distance) | |
2326 | continue; | |
2327 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
2328 | { | |
2329 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
2330 | break; | |
2331 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
2332 | continue; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | /* Make linked list. */ | |
2337 | if (pp) | |
2338 | pp->next = si; | |
2339 | else | |
2340 | rn->info = si; | |
2341 | if (cp) | |
2342 | cp->prev = si; | |
2343 | si->prev = pp; | |
2344 | si->next = cp; | |
2345 | ||
2346 | /* Install into rib. */ | |
2347 | static_install_ipv4 (p, si); | |
2348 | ||
2349 | return 1; | |
2350 | } | |
2351 | ||
2352 | /* Delete static route from static route configuration. */ | |
2353 | int | |
39db97e4 | 2354 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
718e3744 | 2355 | u_char distance, u_int32_t vrf_id) |
2356 | { | |
2357 | u_char type = 0; | |
2358 | struct route_node *rn; | |
2359 | struct static_ipv4 *si; | |
2360 | struct route_table *stable; | |
2361 | ||
2362 | /* Lookup table. */ | |
2363 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2364 | if (! stable) | |
2365 | return -1; | |
2366 | ||
2367 | /* Lookup static route prefix. */ | |
2368 | rn = route_node_lookup (stable, p); | |
2369 | if (! rn) | |
2370 | return 0; | |
2371 | ||
2372 | /* Make flags. */ | |
2373 | if (gate) | |
2374 | type = STATIC_IPV4_GATEWAY; | |
2375 | else if (ifname) | |
2376 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 2377 | else |
2378 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2379 | |
2380 | /* Find same static route is the tree */ | |
2381 | for (si = rn->info; si; si = si->next) | |
2382 | if (type == si->type | |
2383 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2384 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2385 | break; | |
2386 | ||
2387 | /* Can't find static route. */ | |
2388 | if (! si) | |
2389 | { | |
2390 | route_unlock_node (rn); | |
2391 | return 0; | |
2392 | } | |
2393 | ||
2394 | /* Install into rib. */ | |
2395 | static_uninstall_ipv4 (p, si); | |
2396 | ||
2397 | /* Unlink static route from linked list. */ | |
2398 | if (si->prev) | |
2399 | si->prev->next = si->next; | |
2400 | else | |
2401 | rn->info = si->next; | |
2402 | if (si->next) | |
2403 | si->next->prev = si->prev; | |
143a385f | 2404 | route_unlock_node (rn); |
718e3744 | 2405 | |
2406 | /* Free static route configuration. */ | |
a0f6acd8 | 2407 | if (ifname) |
2408 | XFREE (0, si->gate.ifname); | |
718e3744 | 2409 | XFREE (MTYPE_STATIC_IPV4, si); |
2410 | ||
143a385f | 2411 | route_unlock_node (rn); |
2412 | ||
718e3744 | 2413 | return 1; |
2414 | } | |
2415 | ||
2416 | \f | |
2417 | #ifdef HAVE_IPV6 | |
a1ac18c4 | 2418 | static int |
718e3744 | 2419 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
2420 | struct in6_addr *gate, unsigned int ifindex, int table) | |
2421 | { | |
726f9b2b | 2422 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
2423 | #if defined (MUSICA) || defined (LINUX) | |
2424 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
2425 | if (p->prefixlen == 96) | |
2426 | return 0; | |
2427 | #endif /* MUSICA */ | |
718e3744 | 2428 | return 1; |
726f9b2b | 2429 | } |
718e3744 | 2430 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
2431 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
2432 | { | |
2433 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
2434 | return 1; | |
2435 | } | |
2436 | return 0; | |
2437 | } | |
2438 | ||
2439 | int | |
2440 | rib_add_ipv6 (int type, int flags, struct prefix_ipv6 *p, | |
be61c4eb | 2441 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id, |
f768f367 | 2442 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2443 | { |
2444 | struct rib *rib; | |
2445 | struct rib *same = NULL; | |
2446 | struct route_table *table; | |
2447 | struct route_node *rn; | |
2448 | struct nexthop *nexthop; | |
2449 | ||
718e3744 | 2450 | /* Lookup table. */ |
f768f367 | 2451 | table = vrf_table (AFI_IP6, safi, 0); |
718e3744 | 2452 | if (! table) |
2453 | return 0; | |
2454 | ||
2455 | /* Make sure mask is applied. */ | |
2456 | apply_mask_ipv6 (p); | |
2457 | ||
2458 | /* Set default distance by route type. */ | |
be61c4eb | 2459 | if (!distance) |
2460 | distance = route_info[type].distance; | |
718e3744 | 2461 | |
2462 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2463 | distance = 200; | |
2464 | ||
2465 | /* Filter bogus route. */ | |
2466 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
2467 | return 0; | |
2468 | ||
2469 | /* Lookup route node.*/ | |
2470 | rn = route_node_get (table, (struct prefix *) p); | |
2471 | ||
2472 | /* If same type of route are installed, treat it as a implicit | |
2473 | withdraw. */ | |
9fd92e3c | 2474 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2475 | { |
6d691129 PJ |
2476 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2477 | continue; | |
2478 | ||
ebf1ead0 | 2479 | if (rib->type != type) |
2480 | continue; | |
2481 | if (rib->type != ZEBRA_ROUTE_CONNECT) | |
718e3744 | 2482 | { |
2483 | same = rib; | |
718e3744 | 2484 | break; |
2485 | } | |
ebf1ead0 | 2486 | else if ((nexthop = rib->nexthop) && |
2487 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
2488 | nexthop->ifindex == ifindex) | |
2489 | { | |
2490 | rib->refcnt++; | |
2491 | return 0; | |
2492 | } | |
718e3744 | 2493 | } |
2494 | ||
2495 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2496 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2497 | ||
718e3744 | 2498 | rib->type = type; |
2499 | rib->distance = distance; | |
2500 | rib->flags = flags; | |
2501 | rib->metric = metric; | |
b5f45021 | 2502 | rib->table = vrf_id; |
718e3744 | 2503 | rib->nexthop_num = 0; |
2504 | rib->uptime = time (NULL); | |
2505 | ||
2506 | /* Nexthop settings. */ | |
2507 | if (gate) | |
2508 | { | |
2509 | if (ifindex) | |
2510 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
2511 | else | |
2512 | nexthop_ipv6_add (rib, gate); | |
2513 | } | |
2514 | else | |
2515 | nexthop_ifindex_add (rib, ifindex); | |
2516 | ||
2517 | /* If this route is kernel route, set FIB flag to the route. */ | |
2518 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2519 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2520 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2521 | ||
2522 | /* Link new rib to node.*/ | |
2523 | rib_addnode (rn, rib); | |
2524 | ||
718e3744 | 2525 | /* Free implicit route.*/ |
2526 | if (same) | |
4d38fdb4 | 2527 | rib_delnode (rn, same); |
2528 | ||
2529 | route_unlock_node (rn); | |
718e3744 | 2530 | return 0; |
2531 | } | |
2532 | ||
ebf1ead0 | 2533 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2534 | int |
2535 | rib_delete_ipv6 (int type, int flags, struct prefix_ipv6 *p, | |
f768f367 | 2536 | struct in6_addr *gate, unsigned int ifindex, u_int32_t vrf_id, safi_t safi) |
718e3744 | 2537 | { |
2538 | struct route_table *table; | |
2539 | struct route_node *rn; | |
2540 | struct rib *rib; | |
2541 | struct rib *fib = NULL; | |
2542 | struct rib *same = NULL; | |
2543 | struct nexthop *nexthop; | |
81cce018 SH |
2544 | char buf1[INET6_ADDRSTRLEN]; |
2545 | char buf2[INET6_ADDRSTRLEN]; | |
718e3744 | 2546 | |
2547 | /* Apply mask. */ | |
2548 | apply_mask_ipv6 (p); | |
2549 | ||
2550 | /* Lookup table. */ | |
f768f367 | 2551 | table = vrf_table (AFI_IP6, safi, 0); |
718e3744 | 2552 | if (! table) |
2553 | return 0; | |
4d38fdb4 | 2554 | |
718e3744 | 2555 | /* Lookup route node. */ |
2556 | rn = route_node_lookup (table, (struct prefix *) p); | |
2557 | if (! rn) | |
2558 | { | |
2559 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2560 | { | |
2561 | if (gate) | |
b6178002 | 2562 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2563 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2564 | p->prefixlen, |
81cce018 | 2565 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 2566 | ifindex); |
2567 | else | |
b6178002 | 2568 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2569 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2570 | p->prefixlen, |
2571 | ifindex); | |
2572 | } | |
2573 | return ZEBRA_ERR_RTNOEXIST; | |
2574 | } | |
2575 | ||
2576 | /* Lookup same type route. */ | |
9fd92e3c | 2577 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2578 | { |
6d691129 PJ |
2579 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
2580 | continue; | |
2581 | ||
718e3744 | 2582 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2583 | fib = rib; | |
2584 | ||
ebf1ead0 | 2585 | if (rib->type != type) |
2586 | continue; | |
2587 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && | |
4f1735fd | 2588 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2589 | { |
4f1735fd MF |
2590 | if (nexthop->ifindex != ifindex) |
2591 | continue; | |
ebf1ead0 | 2592 | if (rib->refcnt) |
718e3744 | 2593 | { |
ebf1ead0 | 2594 | rib->refcnt--; |
2595 | route_unlock_node (rn); | |
2596 | route_unlock_node (rn); | |
2597 | return 0; | |
718e3744 | 2598 | } |
ebf1ead0 | 2599 | same = rib; |
2600 | break; | |
718e3744 | 2601 | } |
ebf1ead0 | 2602 | /* Make sure that the route found has the same gateway. */ |
2603 | else if (gate == NULL || | |
2604 | ((nexthop = rib->nexthop) && | |
2605 | (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate) || | |
2606 | IPV6_ADDR_SAME (&nexthop->rgate.ipv6, gate)))) | |
718e3744 | 2607 | { |
ebf1ead0 | 2608 | same = rib; |
2609 | break; | |
718e3744 | 2610 | } |
2611 | } | |
2612 | ||
2613 | /* If same type of route can't be found and this message is from | |
2614 | kernel. */ | |
2615 | if (! same) | |
2616 | { | |
2617 | if (fib && type == ZEBRA_ROUTE_KERNEL) | |
2618 | { | |
2619 | /* Unset flags. */ | |
2620 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2621 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2622 | ||
2623 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2624 | } | |
2625 | else | |
2626 | { | |
2627 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2628 | { | |
2629 | if (gate) | |
b6178002 | 2630 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2631 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2632 | p->prefixlen, |
81cce018 | 2633 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 2634 | ifindex, |
2635 | type); | |
2636 | else | |
b6178002 | 2637 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2638 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 2639 | p->prefixlen, |
2640 | ifindex, | |
2641 | type); | |
2642 | } | |
2643 | route_unlock_node (rn); | |
2644 | return ZEBRA_ERR_RTNOEXIST; | |
2645 | } | |
2646 | } | |
2647 | ||
718e3744 | 2648 | if (same) |
4d38fdb4 | 2649 | rib_delnode (rn, same); |
2650 | ||
718e3744 | 2651 | route_unlock_node (rn); |
718e3744 | 2652 | return 0; |
2653 | } | |
2654 | \f | |
2655 | /* Install static route into rib. */ | |
a1ac18c4 | 2656 | static void |
718e3744 | 2657 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
2658 | { | |
2659 | struct rib *rib; | |
2660 | struct route_table *table; | |
2661 | struct route_node *rn; | |
2662 | ||
2663 | /* Lookup table. */ | |
2664 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2665 | if (! table) | |
2666 | return; | |
2667 | ||
2668 | /* Lookup existing route */ | |
2669 | rn = route_node_get (table, p); | |
9fd92e3c | 2670 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2671 | { |
2672 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) | |
2673 | continue; | |
2674 | ||
2675 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2676 | break; | |
2677 | } | |
718e3744 | 2678 | |
2679 | if (rib) | |
2680 | { | |
2681 | /* Same distance static route is there. Update it with new | |
2682 | nexthop. */ | |
718e3744 | 2683 | route_unlock_node (rn); |
2684 | ||
2685 | switch (si->type) | |
2686 | { | |
2687 | case STATIC_IPV6_GATEWAY: | |
2688 | nexthop_ipv6_add (rib, &si->ipv6); | |
2689 | break; | |
2690 | case STATIC_IPV6_IFNAME: | |
2691 | nexthop_ifname_add (rib, si->ifname); | |
2692 | break; | |
2693 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2694 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
2695 | break; | |
2696 | } | |
3c0755dc | 2697 | rib_queue_add (&zebrad, rn); |
718e3744 | 2698 | } |
2699 | else | |
2700 | { | |
2701 | /* This is new static route. */ | |
4d38fdb4 | 2702 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2703 | ||
718e3744 | 2704 | rib->type = ZEBRA_ROUTE_STATIC; |
2705 | rib->distance = si->distance; | |
2706 | rib->metric = 0; | |
2707 | rib->nexthop_num = 0; | |
2708 | ||
2709 | switch (si->type) | |
2710 | { | |
2711 | case STATIC_IPV6_GATEWAY: | |
2712 | nexthop_ipv6_add (rib, &si->ipv6); | |
2713 | break; | |
2714 | case STATIC_IPV6_IFNAME: | |
2715 | nexthop_ifname_add (rib, si->ifname); | |
2716 | break; | |
2717 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2718 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
2719 | break; | |
2720 | } | |
2721 | ||
81dfcaa2 | 2722 | /* Save the flags of this static routes (reject, blackhole) */ |
2723 | rib->flags = si->flags; | |
2724 | ||
718e3744 | 2725 | /* Link this rib to the tree. */ |
2726 | rib_addnode (rn, rib); | |
718e3744 | 2727 | } |
2728 | } | |
2729 | ||
a1ac18c4 | 2730 | static int |
718e3744 | 2731 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
2732 | { | |
2733 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
2734 | && si->type == STATIC_IPV6_GATEWAY | |
2735 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
2736 | return 1; | |
2737 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2738 | && si->type == STATIC_IPV6_IFNAME | |
2739 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
2740 | return 1; | |
2741 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
2742 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
2743 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
2744 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
2745 | return 1; | |
e8e1946e | 2746 | return 0; |
718e3744 | 2747 | } |
2748 | ||
a1ac18c4 | 2749 | static void |
718e3744 | 2750 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
2751 | { | |
2752 | struct route_table *table; | |
2753 | struct route_node *rn; | |
2754 | struct rib *rib; | |
2755 | struct nexthop *nexthop; | |
2756 | ||
2757 | /* Lookup table. */ | |
2758 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2759 | if (! table) | |
2760 | return; | |
2761 | ||
2762 | /* Lookup existing route with type and distance. */ | |
2763 | rn = route_node_lookup (table, (struct prefix *) p); | |
2764 | if (! rn) | |
2765 | return; | |
2766 | ||
9fd92e3c | 2767 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2768 | { |
2769 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2770 | continue; | |
2771 | ||
2772 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2773 | break; | |
2774 | } | |
2775 | ||
718e3744 | 2776 | if (! rib) |
2777 | { | |
2778 | route_unlock_node (rn); | |
2779 | return; | |
2780 | } | |
2781 | ||
2782 | /* Lookup nexthop. */ | |
2783 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2784 | if (static_ipv6_nexthop_same (nexthop, si)) | |
2785 | break; | |
2786 | ||
2787 | /* Can't find nexthop. */ | |
2788 | if (! nexthop) | |
2789 | { | |
2790 | route_unlock_node (rn); | |
2791 | return; | |
2792 | } | |
2793 | ||
2794 | /* Check nexthop. */ | |
2795 | if (rib->nexthop_num == 1) | |
2796 | { | |
2797 | rib_delnode (rn, rib); | |
718e3744 | 2798 | } |
2799 | else | |
2800 | { | |
6baeb988 | 2801 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
2802 | rib_uninstall (rn, rib); | |
319572cc | 2803 | nexthop_delete (rib, nexthop); |
2804 | nexthop_free (nexthop); | |
6d691129 | 2805 | rib_queue_add (&zebrad, rn); |
718e3744 | 2806 | } |
718e3744 | 2807 | /* Unlock node. */ |
2808 | route_unlock_node (rn); | |
2809 | } | |
2810 | ||
2811 | /* Add static route into static route configuration. */ | |
2812 | int | |
2813 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
39db97e4 | 2814 | const char *ifname, u_char flags, u_char distance, |
2815 | u_int32_t vrf_id) | |
718e3744 | 2816 | { |
2817 | struct route_node *rn; | |
2818 | struct static_ipv6 *si; | |
2819 | struct static_ipv6 *pp; | |
2820 | struct static_ipv6 *cp; | |
2821 | struct route_table *stable; | |
2822 | ||
2823 | /* Lookup table. */ | |
2824 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
2825 | if (! stable) | |
2826 | return -1; | |
27b47253 PJ |
2827 | |
2828 | if (!gate && | |
2829 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
2830 | return -1; | |
2831 | ||
2832 | if (!ifname && | |
2833 | (type == STATIC_IPV6_GATEWAY_IFNAME || type == STATIC_IPV6_IFNAME)) | |
2834 | return -1; | |
718e3744 | 2835 | |
2836 | /* Lookup static route prefix. */ | |
2837 | rn = route_node_get (stable, p); | |
2838 | ||
2839 | /* Do nothing if there is a same static route. */ | |
2840 | for (si = rn->info; si; si = si->next) | |
2841 | { | |
2842 | if (distance == si->distance | |
2843 | && type == si->type | |
2844 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
2845 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
2846 | { | |
2847 | route_unlock_node (rn); | |
2848 | return 0; | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | /* Make new static route structure. */ | |
393deb9b | 2853 | si = XCALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
718e3744 | 2854 | |
2855 | si->type = type; | |
2856 | si->distance = distance; | |
81dfcaa2 | 2857 | si->flags = flags; |
718e3744 | 2858 | |
2859 | switch (type) | |
2860 | { | |
2861 | case STATIC_IPV6_GATEWAY: | |
2862 | si->ipv6 = *gate; | |
2863 | break; | |
2864 | case STATIC_IPV6_IFNAME: | |
2865 | si->ifname = XSTRDUP (0, ifname); | |
2866 | break; | |
2867 | case STATIC_IPV6_GATEWAY_IFNAME: | |
2868 | si->ipv6 = *gate; | |
2869 | si->ifname = XSTRDUP (0, ifname); | |
2870 | break; | |
2871 | } | |
2872 | ||
2873 | /* Add new static route information to the tree with sort by | |
2874 | distance value and gateway address. */ | |
2875 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2876 | { | |
2877 | if (si->distance < cp->distance) | |
2878 | break; | |
2879 | if (si->distance > cp->distance) | |
2880 | continue; | |
2881 | } | |
2882 | ||
2883 | /* Make linked list. */ | |
2884 | if (pp) | |
2885 | pp->next = si; | |
2886 | else | |
2887 | rn->info = si; | |
2888 | if (cp) | |
2889 | cp->prev = si; | |
2890 | si->prev = pp; | |
2891 | si->next = cp; | |
2892 | ||
2893 | /* Install into rib. */ | |
2894 | static_install_ipv6 (p, si); | |
2895 | ||
2896 | return 1; | |
2897 | } | |
2898 | ||
2899 | /* Delete static route from static route configuration. */ | |
2900 | int | |
2901 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
39db97e4 | 2902 | const char *ifname, u_char distance, u_int32_t vrf_id) |
718e3744 | 2903 | { |
2904 | struct route_node *rn; | |
2905 | struct static_ipv6 *si; | |
2906 | struct route_table *stable; | |
2907 | ||
2908 | /* Lookup table. */ | |
2909 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
2910 | if (! stable) | |
2911 | return -1; | |
2912 | ||
2913 | /* Lookup static route prefix. */ | |
2914 | rn = route_node_lookup (stable, p); | |
2915 | if (! rn) | |
2916 | return 0; | |
2917 | ||
2918 | /* Find same static route is the tree */ | |
2919 | for (si = rn->info; si; si = si->next) | |
2920 | if (distance == si->distance | |
2921 | && type == si->type | |
2922 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
2923 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
2924 | break; | |
2925 | ||
2926 | /* Can't find static route. */ | |
2927 | if (! si) | |
2928 | { | |
2929 | route_unlock_node (rn); | |
2930 | return 0; | |
2931 | } | |
2932 | ||
2933 | /* Install into rib. */ | |
2934 | static_uninstall_ipv6 (p, si); | |
2935 | ||
2936 | /* Unlink static route from linked list. */ | |
2937 | if (si->prev) | |
2938 | si->prev->next = si->next; | |
2939 | else | |
2940 | rn->info = si->next; | |
2941 | if (si->next) | |
2942 | si->next->prev = si->prev; | |
2943 | ||
2944 | /* Free static route configuration. */ | |
a0f6acd8 | 2945 | if (ifname) |
2946 | XFREE (0, si->ifname); | |
718e3744 | 2947 | XFREE (MTYPE_STATIC_IPV6, si); |
2948 | ||
2949 | return 1; | |
2950 | } | |
2951 | #endif /* HAVE_IPV6 */ | |
2952 | \f | |
2953 | /* RIB update function. */ | |
2954 | void | |
a1ac18c4 | 2955 | rib_update (void) |
718e3744 | 2956 | { |
2957 | struct route_node *rn; | |
2958 | struct route_table *table; | |
4d38fdb4 | 2959 | |
718e3744 | 2960 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
2961 | if (table) | |
2962 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 2963 | if (rnode_to_ribs (rn)) |
6d691129 | 2964 | rib_queue_add (&zebrad, rn); |
718e3744 | 2965 | |
2966 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
2967 | if (table) | |
2968 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 2969 | if (rnode_to_ribs (rn)) |
6d691129 | 2970 | rib_queue_add (&zebrad, rn); |
718e3744 | 2971 | } |
2972 | ||
718e3744 | 2973 | \f |
2974 | /* Remove all routes which comes from non main table. */ | |
a1ac18c4 | 2975 | static void |
718e3744 | 2976 | rib_weed_table (struct route_table *table) |
2977 | { | |
2978 | struct route_node *rn; | |
2979 | struct rib *rib; | |
2980 | struct rib *next; | |
2981 | ||
2982 | if (table) | |
2983 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 2984 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 2985 | { |
6d691129 PJ |
2986 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2987 | continue; | |
2988 | ||
b21b19c5 | 2989 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 2990 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 2991 | rib_delnode (rn, rib); |
718e3744 | 2992 | } |
2993 | } | |
2994 | ||
2995 | /* Delete all routes from non main table. */ | |
2996 | void | |
a1ac18c4 | 2997 | rib_weed_tables (void) |
718e3744 | 2998 | { |
2999 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3000 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3001 | } | |
3002 | \f | |
3003 | /* Delete self installed routes after zebra is relaunched. */ | |
a1ac18c4 | 3004 | static void |
718e3744 | 3005 | rib_sweep_table (struct route_table *table) |
3006 | { | |
3007 | struct route_node *rn; | |
3008 | struct rib *rib; | |
3009 | struct rib *next; | |
3010 | int ret = 0; | |
3011 | ||
3012 | if (table) | |
3013 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3014 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3015 | { |
6d691129 PJ |
3016 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3017 | continue; | |
3018 | ||
718e3744 | 3019 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3020 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3021 | { | |
3022 | ret = rib_uninstall_kernel (rn, rib); | |
3023 | if (! ret) | |
4d38fdb4 | 3024 | rib_delnode (rn, rib); |
718e3744 | 3025 | } |
3026 | } | |
3027 | } | |
3028 | ||
3029 | /* Sweep all RIB tables. */ | |
3030 | void | |
a1ac18c4 | 3031 | rib_sweep_route (void) |
718e3744 | 3032 | { |
3033 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3034 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3035 | } | |
2ea1ab1c VT |
3036 | |
3037 | /* Remove specific by protocol routes from 'table'. */ | |
3038 | static unsigned long | |
3039 | rib_score_proto_table (u_char proto, struct route_table *table) | |
3040 | { | |
3041 | struct route_node *rn; | |
3042 | struct rib *rib; | |
3043 | struct rib *next; | |
3044 | unsigned long n = 0; | |
3045 | ||
3046 | if (table) | |
3047 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3048 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3049 | { |
2ea1ab1c VT |
3050 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3051 | continue; | |
3052 | if (rib->type == proto) | |
3053 | { | |
3054 | rib_delnode (rn, rib); | |
3055 | n++; | |
3056 | } | |
3057 | } | |
3058 | ||
3059 | return n; | |
3060 | } | |
3061 | ||
3062 | /* Remove specific by protocol routes. */ | |
3063 | unsigned long | |
3064 | rib_score_proto (u_char proto) | |
3065 | { | |
3066 | return rib_score_proto_table (proto, vrf_table (AFI_IP, SAFI_UNICAST, 0)) | |
3067 | +rib_score_proto_table (proto, vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3068 | } | |
3069 | ||
718e3744 | 3070 | /* Close RIB and clean up kernel routes. */ |
a1ac18c4 | 3071 | static void |
718e3744 | 3072 | rib_close_table (struct route_table *table) |
3073 | { | |
3074 | struct route_node *rn; | |
3075 | struct rib *rib; | |
3076 | ||
3077 | if (table) | |
3078 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3079 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3080 | { |
9fd92e3c AS |
3081 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3082 | continue; | |
3083 | ||
3084 | if (! RIB_SYSTEM_ROUTE (rib)) | |
3085 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3086 | } |
718e3744 | 3087 | } |
3088 | ||
3089 | /* Close all RIB tables. */ | |
3090 | void | |
a1ac18c4 | 3091 | rib_close (void) |
718e3744 | 3092 | { |
3093 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3094 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3095 | } | |
3096 | \f | |
3097 | /* Routing information base initialize. */ | |
3098 | void | |
a1ac18c4 | 3099 | rib_init (void) |
718e3744 | 3100 | { |
4d38fdb4 | 3101 | rib_queue_init (&zebrad); |
718e3744 | 3102 | /* VRF initialization. */ |
3103 | vrf_init (); | |
3104 | } | |
0915bb0c AS |
3105 | |
3106 | /* | |
3107 | * vrf_id_get_next | |
3108 | * | |
3109 | * Get the first vrf id that is greater than the given vrf id if any. | |
3110 | * | |
3111 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3112 | */ | |
3113 | static inline int | |
3114 | vrf_id_get_next (uint32_t id, uint32_t *next_id_p) | |
3115 | { | |
3116 | while (++id < vector_active (vrf_vector)) | |
3117 | { | |
3118 | if (vrf_lookup (id)) | |
3119 | { | |
3120 | *next_id_p = id; | |
3121 | return 1; | |
3122 | } | |
3123 | } | |
3124 | ||
3125 | return 0; | |
3126 | } | |
3127 | ||
3128 | /* | |
3129 | * rib_tables_iter_next | |
3130 | * | |
3131 | * Returns the next table in the iteration. | |
3132 | */ | |
3133 | struct route_table * | |
3134 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
3135 | { | |
3136 | struct route_table *table; | |
3137 | ||
3138 | /* | |
3139 | * Array that helps us go over all AFI/SAFI combinations via one | |
3140 | * index. | |
3141 | */ | |
3142 | static struct { | |
3143 | afi_t afi; | |
3144 | safi_t safi; | |
3145 | } afi_safis[] = { | |
3146 | { AFI_IP, SAFI_UNICAST }, | |
3147 | { AFI_IP, SAFI_MULTICAST }, | |
3148 | { AFI_IP6, SAFI_UNICAST }, | |
3149 | { AFI_IP6, SAFI_MULTICAST }, | |
3150 | }; | |
3151 | ||
3152 | table = NULL; | |
3153 | ||
3154 | switch (iter->state) | |
3155 | { | |
3156 | ||
3157 | case RIB_TABLES_ITER_S_INIT: | |
3158 | iter->vrf_id = 0; | |
3159 | iter->afi_safi_ix = -1; | |
3160 | ||
3161 | /* Fall through */ | |
3162 | ||
3163 | case RIB_TABLES_ITER_S_ITERATING: | |
3164 | iter->afi_safi_ix++; | |
3165 | while (1) | |
3166 | { | |
3167 | ||
3168 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
3169 | { | |
3170 | table = vrf_table (afi_safis[iter->afi_safi_ix].afi, | |
3171 | afi_safis[iter->afi_safi_ix].safi, | |
3172 | iter->vrf_id); | |
3173 | if (table) | |
3174 | break; | |
3175 | ||
3176 | iter->afi_safi_ix++; | |
3177 | } | |
3178 | ||
3179 | /* | |
3180 | * Found another table in this vrf. | |
3181 | */ | |
3182 | if (table) | |
3183 | break; | |
3184 | ||
3185 | /* | |
3186 | * Done with all tables in the current vrf, go to the next | |
3187 | * one. | |
3188 | */ | |
3189 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
3190 | break; | |
3191 | ||
3192 | iter->afi_safi_ix = 0; | |
3193 | } | |
3194 | ||
3195 | break; | |
3196 | ||
3197 | case RIB_TABLES_ITER_S_DONE: | |
3198 | return NULL; | |
3199 | } | |
3200 | ||
3201 | if (table) | |
3202 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3203 | else | |
3204 | iter->state = RIB_TABLES_ITER_S_DONE; | |
3205 | ||
3206 | return table; | |
3207 | } |