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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" | |
fb018d25 | 37 | #include "nexthop.h" |
718e3744 | 38 | |
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/zserv.h" | |
42 | #include "zebra/redistribute.h" | |
43 | #include "zebra/debug.h" | |
5adc2528 | 44 | #include "zebra/zebra_fpm.h" |
fb018d25 | 45 | #include "zebra/zebra_rnh.h" |
718e3744 | 46 | |
47 | /* Default rtm_table for all clients */ | |
b21b19c5 | 48 | extern struct zebra_t zebrad; |
718e3744 | 49 | |
457eb9af PJ |
50 | /* Hold time for RIB process, should be very minimal. |
51 | * it is useful to able to set it otherwise for testing, hence exported | |
52 | * as global here for test-rig code. | |
53 | */ | |
54 | int rib_process_hold_time = 10; | |
55 | ||
718e3744 | 56 | /* Each route type's string and default distance value. */ |
d145bc00 | 57 | static const struct |
718e3744 | 58 | { |
59 | int key; | |
60 | int distance; | |
5734509c | 61 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 62 | { |
5734509c PJ |
63 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
64 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
65 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
66 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
67 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
68 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
69 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
70 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
71 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
72 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
73 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 95}, | |
7052f228 | 74 | /* no entry/default: 150 */ |
718e3744 | 75 | }; |
6b0655a2 | 76 | |
718e3744 | 77 | /* Vector for routing table. */ |
d145bc00 | 78 | static vector vrf_vector; |
718e3744 | 79 | |
1b5ed1b0 AS |
80 | /* |
81 | * vrf_table_create | |
82 | */ | |
83 | static void | |
84 | vrf_table_create (struct vrf *vrf, afi_t afi, safi_t safi) | |
85 | { | |
86 | rib_table_info_t *info; | |
87 | struct route_table *table; | |
88 | ||
89 | assert (!vrf->table[afi][safi]); | |
90 | ||
91 | table = route_table_init (); | |
92 | vrf->table[afi][safi] = table; | |
93 | ||
94 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
95 | info->vrf = vrf; | |
96 | info->afi = afi; | |
97 | info->safi = safi; | |
98 | table->info = info; | |
99 | } | |
100 | ||
718e3744 | 101 | /* Allocate new VRF. */ |
a1ac18c4 | 102 | static struct vrf * |
fce954f8 | 103 | vrf_alloc (const char *name) |
718e3744 | 104 | { |
105 | struct vrf *vrf; | |
106 | ||
107 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); | |
108 | ||
109 | /* Put name. */ | |
110 | if (name) | |
111 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); | |
112 | ||
113 | /* Allocate routing table and static table. */ | |
1b5ed1b0 AS |
114 | vrf_table_create (vrf, AFI_IP, SAFI_UNICAST); |
115 | vrf_table_create (vrf, AFI_IP6, SAFI_UNICAST); | |
718e3744 | 116 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); |
117 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
1b5ed1b0 AS |
118 | vrf_table_create (vrf, AFI_IP, SAFI_MULTICAST); |
119 | vrf_table_create (vrf, AFI_IP6, SAFI_MULTICAST); | |
cddf391b B |
120 | vrf->stable[AFI_IP][SAFI_MULTICAST] = route_table_init (); |
121 | vrf->stable[AFI_IP6][SAFI_MULTICAST] = route_table_init (); | |
122 | ||
fb018d25 DS |
123 | vrf->rnh_table[AFI_IP] = route_table_init(); |
124 | vrf->rnh_table[AFI_IP6] = route_table_init(); | |
718e3744 | 125 | |
078430f6 DS |
126 | vrf->import_check_table[AFI_IP] = route_table_init(); |
127 | vrf->import_check_table[AFI_IP6] = route_table_init(); | |
128 | ||
718e3744 | 129 | return vrf; |
130 | } | |
131 | ||
718e3744 | 132 | /* Lookup VRF by identifier. */ |
133 | struct vrf * | |
134 | vrf_lookup (u_int32_t id) | |
135 | { | |
136 | return vector_lookup (vrf_vector, id); | |
137 | } | |
138 | ||
718e3744 | 139 | /* Initialize VRF. */ |
a1ac18c4 | 140 | static void |
141 | vrf_init (void) | |
718e3744 | 142 | { |
143 | struct vrf *default_table; | |
144 | ||
145 | /* Allocate VRF vector. */ | |
146 | vrf_vector = vector_init (1); | |
147 | ||
148 | /* Allocate default main table. */ | |
149 | default_table = vrf_alloc ("Default-IP-Routing-Table"); | |
150 | ||
151 | /* Default table index must be 0. */ | |
152 | vector_set_index (vrf_vector, 0, default_table); | |
153 | } | |
154 | ||
155 | /* Lookup route table. */ | |
156 | struct route_table * | |
157 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) | |
158 | { | |
159 | struct vrf *vrf; | |
160 | ||
161 | vrf = vrf_lookup (id); | |
162 | if (! vrf) | |
163 | return NULL; | |
164 | ||
9499bf2b LR |
165 | if( afi >= AFI_MAX || safi >= SAFI_MAX ) |
166 | return NULL; | |
167 | ||
718e3744 | 168 | return vrf->table[afi][safi]; |
169 | } | |
170 | ||
171 | /* Lookup static route table. */ | |
172 | struct route_table * | |
173 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) | |
174 | { | |
175 | struct vrf *vrf; | |
176 | ||
177 | vrf = vrf_lookup (id); | |
178 | if (! vrf) | |
179 | return NULL; | |
180 | ||
9499bf2b LR |
181 | if( afi >= AFI_MAX || safi >= SAFI_MAX ) |
182 | return NULL; | |
183 | ||
718e3744 | 184 | return vrf->stable[afi][safi]; |
185 | } | |
6b0655a2 | 186 | |
7a4bb9c5 DS |
187 | struct route_table * |
188 | vrf_other_route_table (afi_t afi, u_int32_t table_id, u_int32_t vrf_id) | |
189 | { | |
190 | struct vrf *vrf; | |
191 | ||
192 | vrf = vrf_lookup (vrf_id); | |
193 | if (! vrf) | |
194 | return NULL; | |
195 | ||
196 | if(afi >= AFI_MAX) | |
197 | return NULL; | |
198 | ||
199 | if (table_id >= ZEBRA_KERNEL_TABLE_MAX) | |
200 | return NULL; | |
201 | ||
202 | if (vrf->other_table[afi][table_id] == NULL) | |
203 | { | |
204 | vrf->other_table[afi][table_id] = route_table_init(); | |
205 | } | |
206 | ||
207 | return (vrf->other_table[afi][table_id]); | |
208 | } | |
209 | ||
210 | int | |
211 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
212 | { | |
213 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX) || | |
214 | (table_id == RT_TABLE_UNSPEC) || | |
215 | (table_id == RT_TABLE_LOCAL) || | |
216 | (table_id == RT_TABLE_COMPAT)) | |
217 | return 0; | |
218 | else | |
219 | return 1; | |
220 | } | |
221 | ||
222 | int | |
223 | is_zebra_main_routing_table(u_int32_t table_id) | |
224 | { | |
225 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
226 | return 1; | |
227 | return 0; | |
228 | } | |
229 | ||
fa713d9e | 230 | /* Add nexthop to the end of a nexthop list. */ |
4e3afb14 | 231 | static void |
fa713d9e | 232 | _nexthop_add (struct nexthop **target, struct nexthop *nexthop) |
718e3744 | 233 | { |
234 | struct nexthop *last; | |
235 | ||
fa713d9e | 236 | for (last = *target; last && last->next; last = last->next) |
718e3744 | 237 | ; |
238 | if (last) | |
239 | last->next = nexthop; | |
240 | else | |
fa713d9e | 241 | *target = nexthop; |
718e3744 | 242 | nexthop->prev = last; |
fa713d9e | 243 | } |
718e3744 | 244 | |
fa713d9e | 245 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 246 | void |
fa713d9e CF |
247 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
248 | { | |
249 | _nexthop_add(&rib->nexthop, nexthop); | |
718e3744 | 250 | rib->nexthop_num++; |
251 | } | |
252 | ||
6e26278c DS |
253 | static void |
254 | _copy_nexthops (struct nexthop **tnh, struct nexthop *nh) | |
255 | { | |
256 | struct nexthop *nexthop; | |
257 | struct nexthop *nh1; | |
258 | ||
259 | for (nh1 = nh; nh1; nh1 = nh1->next) | |
260 | { | |
261 | nexthop = nexthop_new(); | |
262 | nexthop->flags = nh->flags; | |
263 | nexthop->type = nh->type; | |
264 | nexthop->ifindex = nh->ifindex; | |
265 | if (nh->ifname) | |
266 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
267 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
268 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
269 | _nexthop_add(tnh, nexthop); | |
270 | ||
271 | if (CHECK_FLAG(nh1->flags, NEXTHOP_FLAG_RECURSIVE)) | |
272 | _copy_nexthops(&nexthop->resolved, nh1->resolved); | |
273 | } | |
274 | } | |
275 | ||
276 | /** | |
277 | * copy_nexthop - copy a nexthop to the rib structure. | |
278 | */ | |
279 | void | |
280 | copy_nexthops (struct rib *rib, struct nexthop *nh) | |
281 | { | |
282 | struct nexthop *nexthop; | |
283 | ||
284 | nexthop = nexthop_new(); | |
285 | nexthop->flags = nh->flags; | |
286 | nexthop->type = nh->type; | |
287 | nexthop->ifindex = nh->ifindex; | |
288 | if (nh->ifname) | |
289 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
290 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
291 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
292 | nexthop_add(rib, nexthop); | |
293 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) | |
294 | _copy_nexthops(&nexthop->resolved, nh->resolved); | |
295 | } | |
296 | ||
718e3744 | 297 | /* Delete specified nexthop from the list. */ |
a1ac18c4 | 298 | static void |
718e3744 | 299 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
300 | { | |
301 | if (nexthop->next) | |
302 | nexthop->next->prev = nexthop->prev; | |
303 | if (nexthop->prev) | |
304 | nexthop->prev->next = nexthop->next; | |
305 | else | |
306 | rib->nexthop = nexthop->next; | |
307 | rib->nexthop_num--; | |
308 | } | |
309 | ||
310 | /* Free nexthop. */ | |
fb018d25 | 311 | void |
6e26278c | 312 | nexthop_free (struct nexthop *nexthop, struct route_node *rn) |
718e3744 | 313 | { |
a4b70768 | 314 | if (nexthop->ifname) |
315 | XFREE (0, nexthop->ifname); | |
fa713d9e | 316 | if (nexthop->resolved) |
6e26278c | 317 | nexthops_free(nexthop->resolved, rn); |
718e3744 | 318 | XFREE (MTYPE_NEXTHOP, nexthop); |
319 | } | |
320 | ||
fa713d9e | 321 | /* Frees a list of nexthops */ |
fb018d25 | 322 | void |
6e26278c | 323 | nexthops_free (struct nexthop *nexthop, struct route_node *rn) |
fa713d9e CF |
324 | { |
325 | struct nexthop *nh, *next; | |
6e26278c | 326 | struct prefix nh_p; |
fa713d9e CF |
327 | |
328 | for (nh = nexthop; nh; nh = next) | |
329 | { | |
330 | next = nh->next; | |
6e26278c DS |
331 | if (nh->type == NEXTHOP_TYPE_IPV4) |
332 | { | |
333 | nh_p.family = AF_INET; | |
334 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
335 | nh_p.u.prefix4 = nh->gate.ipv4; | |
70c0f184 | 336 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c DS |
337 | } |
338 | else if (nh->type == NEXTHOP_TYPE_IPV6) | |
339 | { | |
340 | nh_p.family = AF_INET6; | |
341 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
342 | nh_p.u.prefix6 = nh->gate.ipv6; | |
70c0f184 | 343 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c | 344 | } |
6e26278c | 345 | nexthop_free (nh, rn); |
fa713d9e CF |
346 | } |
347 | } | |
348 | ||
718e3744 | 349 | struct nexthop * |
350 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
351 | { | |
352 | struct nexthop *nexthop; | |
353 | ||
393deb9b | 354 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 355 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
356 | nexthop->ifindex = ifindex; | |
357 | ||
358 | nexthop_add (rib, nexthop); | |
359 | ||
360 | return nexthop; | |
361 | } | |
362 | ||
363 | struct nexthop * | |
364 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
365 | { | |
366 | struct nexthop *nexthop; | |
367 | ||
393deb9b | 368 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 369 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
a4b70768 | 370 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 371 | |
372 | nexthop_add (rib, nexthop); | |
373 | ||
374 | return nexthop; | |
375 | } | |
376 | ||
377 | struct nexthop * | |
7514fb77 | 378 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 379 | { |
380 | struct nexthop *nexthop; | |
381 | ||
393deb9b | 382 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 383 | nexthop->type = NEXTHOP_TYPE_IPV4; |
384 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
385 | if (src) |
386 | nexthop->src.ipv4 = *src; | |
718e3744 | 387 | |
388 | nexthop_add (rib, nexthop); | |
389 | ||
390 | return nexthop; | |
391 | } | |
392 | ||
26e2ae36 | 393 | struct nexthop * |
718e3744 | 394 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
7514fb77 | 395 | struct in_addr *src, unsigned int ifindex) |
718e3744 | 396 | { |
397 | struct nexthop *nexthop; | |
398 | ||
393deb9b | 399 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 400 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
401 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
402 | if (src) |
403 | nexthop->src.ipv4 = *src; | |
718e3744 | 404 | nexthop->ifindex = ifindex; |
405 | ||
406 | nexthop_add (rib, nexthop); | |
407 | ||
408 | return nexthop; | |
409 | } | |
410 | ||
c8a1cb5c DS |
411 | struct nexthop * |
412 | nexthop_ipv4_ifindex_ol_add (struct rib *rib, const struct in_addr *ipv4, | |
413 | const struct in_addr *src, const unsigned int ifindex) | |
414 | { | |
415 | struct nexthop *nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
416 | ||
417 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
418 | IPV4_ADDR_COPY (&nexthop->gate.ipv4, ipv4); | |
419 | if (src) | |
420 | IPV4_ADDR_COPY (&nexthop->src.ipv4, src); | |
421 | nexthop->ifindex = ifindex; | |
422 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
423 | nexthop_add (rib, nexthop); | |
424 | return nexthop; | |
425 | } | |
426 | ||
718e3744 | 427 | #ifdef HAVE_IPV6 |
428 | struct nexthop * | |
429 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
430 | { | |
431 | struct nexthop *nexthop; | |
432 | ||
393deb9b | 433 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 434 | nexthop->type = NEXTHOP_TYPE_IPV6; |
435 | nexthop->gate.ipv6 = *ipv6; | |
436 | ||
437 | nexthop_add (rib, nexthop); | |
438 | ||
439 | return nexthop; | |
440 | } | |
441 | ||
41fc2714 | 442 | struct nexthop * |
718e3744 | 443 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
444 | char *ifname) | |
445 | { | |
446 | struct nexthop *nexthop; | |
447 | ||
393deb9b | 448 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 449 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
450 | nexthop->gate.ipv6 = *ipv6; | |
451 | nexthop->ifname = XSTRDUP (0, ifname); | |
452 | ||
453 | nexthop_add (rib, nexthop); | |
454 | ||
455 | return nexthop; | |
456 | } | |
457 | ||
41fc2714 | 458 | struct nexthop * |
718e3744 | 459 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
460 | unsigned int ifindex) | |
461 | { | |
462 | struct nexthop *nexthop; | |
463 | ||
393deb9b | 464 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 465 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
466 | nexthop->gate.ipv6 = *ipv6; | |
467 | nexthop->ifindex = ifindex; | |
468 | ||
469 | nexthop_add (rib, nexthop); | |
470 | ||
471 | return nexthop; | |
472 | } | |
473 | #endif /* HAVE_IPV6 */ | |
474 | ||
595db7f1 | 475 | struct nexthop * |
476 | nexthop_blackhole_add (struct rib *rib) | |
477 | { | |
478 | struct nexthop *nexthop; | |
479 | ||
393deb9b | 480 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
595db7f1 | 481 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
482 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
483 | ||
484 | nexthop_add (rib, nexthop); | |
485 | ||
486 | return nexthop; | |
487 | } | |
488 | ||
fa713d9e CF |
489 | /* This method checks whether a recursive nexthop has at |
490 | * least one resolved nexthop in the fib. | |
491 | */ | |
492 | int | |
493 | nexthop_has_fib_child(struct nexthop *nexthop) | |
494 | { | |
495 | struct nexthop *nh; | |
496 | ||
497 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
498 | return 0; | |
499 | ||
500 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
501 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
502 | return 1; | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
718e3744 | 507 | /* If force flag is not set, do not modify falgs at all for uninstall |
508 | the route from FIB. */ | |
a1ac18c4 | 509 | static int |
718e3744 | 510 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
511 | struct route_node *top) | |
512 | { | |
513 | struct prefix_ipv4 p; | |
514 | struct route_table *table; | |
515 | struct route_node *rn; | |
516 | struct rib *match; | |
fa713d9e | 517 | int resolved; |
6e26278c | 518 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 519 | struct nexthop *resolved_hop; |
6e26278c | 520 | int recursing = 0; |
c8a1cb5c | 521 | struct interface *ifp; |
718e3744 | 522 | |
523 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
524 | nexthop->ifindex = 0; | |
525 | ||
526 | if (set) | |
fa713d9e CF |
527 | { |
528 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 529 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
530 | nexthop->resolved = NULL; |
531 | } | |
718e3744 | 532 | |
6e26278c DS |
533 | /* Skip nexthops that have been filtered out due to route-map */ |
534 | /* The nexthops are specific to this route and so the same */ | |
535 | /* nexthop for a different route may not have this flag set */ | |
536 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
537 | return 0; | |
538 | ||
c8a1cb5c DS |
539 | /* onlink flag is an indication that we need to only check that |
540 | * the link is up, we won't find the GW address in the routing | |
541 | * table. | |
542 | */ | |
543 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
544 | { | |
545 | ifp = if_lookup_by_index (nexthop->ifindex); | |
546 | if (ifp && if_is_operative(ifp)) | |
547 | return 1; | |
548 | else | |
549 | return 0; | |
550 | } | |
551 | ||
718e3744 | 552 | /* Make lookup prefix. */ |
553 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
554 | p.family = AF_INET; | |
555 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
556 | p.prefix = nexthop->gate.ipv4; | |
557 | ||
558 | /* Lookup table. */ | |
559 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
560 | if (! table) | |
561 | return 0; | |
562 | ||
563 | rn = route_node_match (table, (struct prefix *) &p); | |
564 | while (rn) | |
565 | { | |
566 | route_unlock_node (rn); | |
567 | ||
a50c107e | 568 | /* If lookup self prefix return immediately. */ |
718e3744 | 569 | if (rn == top) |
570 | return 0; | |
571 | ||
572 | /* Pick up selected route. */ | |
18ff3edd DS |
573 | /* However, do not resolve over default route unless explicitly allowed. */ |
574 | if (is_default_prefix (&rn->p) && | |
575 | !nh_resolve_via_default (p.family)) | |
576 | return 0; | |
577 | ||
9fd92e3c | 578 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
579 | { |
580 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
581 | continue; | |
582 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
583 | break; | |
584 | } | |
718e3744 | 585 | |
586 | /* If there is no selected route or matched route is EGP, go up | |
587 | tree. */ | |
6e26278c | 588 | if (! match) |
718e3744 | 589 | { |
590 | do { | |
591 | rn = rn->parent; | |
592 | } while (rn && rn->info == NULL); | |
593 | if (rn) | |
594 | route_lock_node (rn); | |
595 | } | |
596 | else | |
597 | { | |
48a53dc7 CF |
598 | /* If the longest prefix match for the nexthop yields |
599 | * a blackhole, mark it as inactive. */ | |
600 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
601 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
602 | return 0; | |
603 | ||
718e3744 | 604 | if (match->type == ZEBRA_ROUTE_CONNECT) |
605 | { | |
606 | /* Directly point connected route. */ | |
607 | newhop = match->nexthop; | |
608 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
609 | nexthop->ifindex = newhop->ifindex; | |
610 | ||
611 | return 1; | |
612 | } | |
613 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
614 | { | |
fa713d9e | 615 | resolved = 0; |
718e3744 | 616 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
617 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
618 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
619 | { | |
620 | if (set) | |
621 | { | |
622 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 623 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
624 | |
625 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
626 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
627 | /* If the resolving route specifies a gateway, use it */ |
628 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
629 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
630 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
631 | { | |
632 | resolved_hop->type = newhop->type; | |
633 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
634 | ||
635 | if (newhop->ifindex) | |
636 | { | |
637 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
638 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
639 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
640 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
641 | } |
642 | } | |
643 | ||
644 | /* If the resolving route is an interface route, | |
645 | * it means the gateway we are looking up is connected | |
646 | * to that interface. (The actual network is _not_ onlink). | |
647 | * Therefore, the resolved route should have the original | |
648 | * gateway as nexthop as it is directly connected. | |
649 | * | |
650 | * On Linux, we have to set the onlink netlink flag because | |
651 | * otherwise, the kernel won't accept the route. */ | |
718e3744 | 652 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
653 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
654 | { | |
655 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
656 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
657 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
658 | resolved_hop->ifindex = newhop->ifindex; | |
659 | } | |
fa713d9e | 660 | |
6e26278c DS |
661 | _nexthop_add(&nexthop->resolved, resolved_hop); |
662 | } | |
663 | resolved = 1; | |
664 | } | |
665 | return resolved; | |
666 | } | |
667 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
668 | { | |
669 | resolved = 0; | |
670 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
671 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
672 | { | |
673 | if (set) | |
674 | { | |
675 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
676 | ||
677 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
678 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
679 | /* If the resolving route specifies a gateway, use it */ | |
680 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
681 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
682 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
683 | { | |
684 | resolved_hop->type = newhop->type; | |
685 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
686 | ||
687 | if (newhop->ifindex) | |
688 | { | |
689 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
690 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
691 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
692 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
693 | } |
694 | } | |
695 | ||
696 | /* If the resolving route is an interface route, | |
697 | * it means the gateway we are looking up is connected | |
698 | * to that interface. (The actual network is _not_ onlink). | |
699 | * Therefore, the resolved route should have the original | |
700 | * gateway as nexthop as it is directly connected. | |
701 | * | |
702 | * On Linux, we have to set the onlink netlink flag because | |
703 | * otherwise, the kernel won't accept the route. | |
704 | */ | |
705 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
706 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
707 | { | |
708 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
709 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
710 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
711 | resolved_hop->ifindex = newhop->ifindex; | |
712 | } | |
713 | ||
fa713d9e | 714 | _nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 715 | } |
fa713d9e | 716 | resolved = 1; |
718e3744 | 717 | } |
fa713d9e | 718 | return resolved; |
718e3744 | 719 | } |
720 | else | |
721 | { | |
722 | return 0; | |
723 | } | |
724 | } | |
725 | } | |
726 | return 0; | |
727 | } | |
728 | ||
729 | #ifdef HAVE_IPV6 | |
730 | /* If force flag is not set, do not modify falgs at all for uninstall | |
731 | the route from FIB. */ | |
a1ac18c4 | 732 | static int |
718e3744 | 733 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
734 | struct route_node *top) | |
735 | { | |
736 | struct prefix_ipv6 p; | |
737 | struct route_table *table; | |
738 | struct route_node *rn; | |
739 | struct rib *match; | |
fa713d9e | 740 | int resolved; |
6e26278c DS |
741 | struct nexthop *newhop, *tnewhop; |
742 | int recursing = 0; | |
fa713d9e | 743 | struct nexthop *resolved_hop; |
718e3744 | 744 | |
745 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
746 | nexthop->ifindex = 0; | |
747 | ||
748 | if (set) | |
fa713d9e CF |
749 | { |
750 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 751 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
752 | nexthop->resolved = NULL; |
753 | } | |
718e3744 | 754 | |
6e26278c DS |
755 | /* Skip nexthops that have been filtered out due to route-map */ |
756 | /* The nexthops are specific to this route and so the same */ | |
757 | /* nexthop for a different route may not have this flag set */ | |
758 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
759 | return 0; | |
760 | ||
718e3744 | 761 | /* Make lookup prefix. */ |
762 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
763 | p.family = AF_INET6; | |
764 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
765 | p.prefix = nexthop->gate.ipv6; | |
766 | ||
767 | /* Lookup table. */ | |
768 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
769 | if (! table) | |
770 | return 0; | |
771 | ||
772 | rn = route_node_match (table, (struct prefix *) &p); | |
773 | while (rn) | |
774 | { | |
775 | route_unlock_node (rn); | |
776 | ||
a50c107e | 777 | /* If lookup self prefix return immediately. */ |
718e3744 | 778 | if (rn == top) |
779 | return 0; | |
780 | ||
781 | /* Pick up selected route. */ | |
18ff3edd DS |
782 | /* However, do not resolve over default route unless explicitly allowed. */ |
783 | if (is_default_prefix (&rn->p) && | |
784 | !nh_resolve_via_default (p.family)) | |
785 | return 0; | |
786 | ||
9fd92e3c | 787 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
788 | { |
789 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
790 | continue; | |
791 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
792 | break; | |
793 | } | |
718e3744 | 794 | |
795 | /* If there is no selected route or matched route is EGP, go up | |
796 | tree. */ | |
6e26278c | 797 | if (! match) |
718e3744 | 798 | { |
799 | do { | |
800 | rn = rn->parent; | |
801 | } while (rn && rn->info == NULL); | |
802 | if (rn) | |
803 | route_lock_node (rn); | |
804 | } | |
805 | else | |
806 | { | |
48a53dc7 CF |
807 | /* If the longest prefix match for the nexthop yields |
808 | * a blackhole, mark it as inactive. */ | |
809 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
810 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
811 | return 0; | |
812 | ||
718e3744 | 813 | if (match->type == ZEBRA_ROUTE_CONNECT) |
814 | { | |
815 | /* Directly point connected route. */ | |
816 | newhop = match->nexthop; | |
817 | ||
818 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
819 | nexthop->ifindex = newhop->ifindex; | |
820 | ||
821 | return 1; | |
822 | } | |
823 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
824 | { | |
fa713d9e | 825 | resolved = 0; |
718e3744 | 826 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
827 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
828 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
829 | { |
830 | if (set) | |
831 | { | |
832 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
833 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
834 | ||
835 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
836 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
837 | /* See nexthop_active_ipv4 for a description how the | |
838 | * resolved nexthop is constructed. */ | |
839 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
840 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
841 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
842 | { | |
843 | resolved_hop->type = newhop->type; | |
844 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
845 | ||
846 | if (newhop->ifindex) | |
847 | { | |
848 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
849 | resolved_hop->ifindex = newhop->ifindex; | |
850 | } | |
851 | } | |
852 | ||
853 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
854 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
855 | { | |
856 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
857 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
858 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
859 | resolved_hop->ifindex = newhop->ifindex; | |
860 | } | |
861 | ||
862 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
863 | } | |
864 | resolved = 1; | |
865 | } | |
866 | return resolved; | |
867 | } | |
868 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
869 | { | |
870 | resolved = 0; | |
871 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
872 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 873 | { |
874 | if (set) | |
875 | { | |
876 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
877 | |
878 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
879 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
880 | /* See nexthop_active_ipv4 for a description how the |
881 | * resolved nexthop is constructed. */ | |
718e3744 | 882 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
883 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
884 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
c3e6b595 CF |
885 | { |
886 | resolved_hop->type = newhop->type; | |
887 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
888 | ||
889 | if (newhop->ifindex) | |
890 | { | |
891 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
892 | resolved_hop->ifindex = newhop->ifindex; | |
893 | } | |
894 | } | |
fa713d9e | 895 | |
718e3744 | 896 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
897 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
898 | { | |
899 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
900 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
901 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
902 | resolved_hop->ifindex = newhop->ifindex; | |
903 | } | |
fa713d9e CF |
904 | |
905 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
718e3744 | 906 | } |
fa713d9e | 907 | resolved = 1; |
718e3744 | 908 | } |
fa713d9e | 909 | return resolved; |
718e3744 | 910 | } |
911 | else | |
912 | { | |
913 | return 0; | |
914 | } | |
915 | } | |
916 | } | |
917 | return 0; | |
918 | } | |
919 | #endif /* HAVE_IPV6 */ | |
920 | ||
921 | struct rib * | |
922 | rib_match_ipv4 (struct in_addr addr) | |
923 | { | |
924 | struct prefix_ipv4 p; | |
925 | struct route_table *table; | |
926 | struct route_node *rn; | |
927 | struct rib *match; | |
fa713d9e CF |
928 | struct nexthop *newhop, *tnewhop; |
929 | int recursing; | |
718e3744 | 930 | |
931 | /* Lookup table. */ | |
932 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
933 | if (! table) | |
934 | return 0; | |
935 | ||
936 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
937 | p.family = AF_INET; | |
938 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
939 | p.prefix = addr; | |
940 | ||
941 | rn = route_node_match (table, (struct prefix *) &p); | |
942 | ||
943 | while (rn) | |
944 | { | |
945 | route_unlock_node (rn); | |
946 | ||
947 | /* Pick up selected route. */ | |
9fd92e3c | 948 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
949 | { |
950 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
951 | continue; | |
952 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
953 | break; | |
954 | } | |
718e3744 | 955 | |
956 | /* If there is no selected route or matched route is EGP, go up | |
957 | tree. */ | |
6e26278c | 958 | if (! match) |
718e3744 | 959 | { |
960 | do { | |
961 | rn = rn->parent; | |
962 | } while (rn && rn->info == NULL); | |
963 | if (rn) | |
964 | route_lock_node (rn); | |
965 | } | |
966 | else | |
967 | { | |
968 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
969 | /* Directly point connected route. */ | |
970 | return match; | |
971 | else | |
972 | { | |
fa713d9e | 973 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 974 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
975 | return match; | |
976 | return NULL; | |
977 | } | |
978 | } | |
979 | } | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | struct rib * | |
984 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
985 | { | |
986 | struct route_table *table; | |
987 | struct route_node *rn; | |
988 | struct rib *match; | |
fa713d9e CF |
989 | struct nexthop *nexthop, *tnexthop; |
990 | int recursing; | |
718e3744 | 991 | |
992 | /* Lookup table. */ | |
993 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
994 | if (! table) | |
995 | return 0; | |
996 | ||
997 | rn = route_node_lookup (table, (struct prefix *) p); | |
998 | ||
999 | /* No route for this prefix. */ | |
1000 | if (! rn) | |
1001 | return NULL; | |
1002 | ||
1003 | /* Unlock node. */ | |
1004 | route_unlock_node (rn); | |
1005 | ||
9fd92e3c | 1006 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1007 | { |
1008 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1009 | continue; | |
1010 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1011 | break; | |
1012 | } | |
718e3744 | 1013 | |
6e26278c | 1014 | if (! match) |
718e3744 | 1015 | return NULL; |
1016 | ||
1017 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1018 | return match; | |
1019 | ||
fa713d9e | 1020 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1021 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1022 | return match; | |
1023 | ||
1024 | return NULL; | |
1025 | } | |
1026 | ||
dc95824a DO |
1027 | /* |
1028 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
1029 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
1030 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
1031 | * | |
1032 | * Return values: | |
1033 | * -1: error | |
1034 | * 0: exact match found | |
1035 | * 1: a match was found with a different gate | |
1036 | * 2: connected route found | |
1037 | * 3: no matches found | |
1038 | */ | |
1039 | int | |
1040 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate) | |
1041 | { | |
1042 | struct route_table *table; | |
1043 | struct route_node *rn; | |
1044 | struct rib *match; | |
fa713d9e CF |
1045 | struct nexthop *nexthop, *tnexthop; |
1046 | int recursing; | |
1047 | int nexthops_active; | |
dc95824a DO |
1048 | |
1049 | /* Lookup table. */ | |
1050 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1051 | if (! table) | |
1052 | return ZEBRA_RIB_LOOKUP_ERROR; | |
1053 | ||
1054 | /* Scan the RIB table for exactly matching RIB entry. */ | |
1055 | rn = route_node_lookup (table, (struct prefix *) p); | |
1056 | ||
1057 | /* No route for this prefix. */ | |
1058 | if (! rn) | |
1059 | return ZEBRA_RIB_NOTFOUND; | |
1060 | ||
1061 | /* Unlock node. */ | |
1062 | route_unlock_node (rn); | |
1063 | ||
1064 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 1065 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1066 | { |
1067 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1068 | continue; | |
1069 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1070 | break; | |
1071 | } | |
dc95824a DO |
1072 | |
1073 | /* None such found :( */ | |
1074 | if (!match) | |
1075 | return ZEBRA_RIB_NOTFOUND; | |
1076 | ||
1077 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1078 | return ZEBRA_RIB_FOUND_CONNECTED; | |
1079 | ||
1080 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
1081 | nexthops_active = 0; |
1082 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 1083 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 1084 | { |
fa713d9e CF |
1085 | nexthops_active = 1; |
1086 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
1087 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 1088 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
1089 | { |
1090 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
1091 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
1092 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
1093 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
1094 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1095 | } | |
dc95824a | 1096 | } |
fa713d9e CF |
1097 | |
1098 | if (nexthops_active) | |
1099 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1100 | |
1101 | return ZEBRA_RIB_NOTFOUND; | |
1102 | } | |
1103 | ||
718e3744 | 1104 | #ifdef HAVE_IPV6 |
1105 | struct rib * | |
1106 | rib_match_ipv6 (struct in6_addr *addr) | |
1107 | { | |
1108 | struct prefix_ipv6 p; | |
1109 | struct route_table *table; | |
1110 | struct route_node *rn; | |
1111 | struct rib *match; | |
fa713d9e CF |
1112 | struct nexthop *newhop, *tnewhop; |
1113 | int recursing; | |
718e3744 | 1114 | |
1115 | /* Lookup table. */ | |
1116 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1117 | if (! table) | |
1118 | return 0; | |
1119 | ||
1120 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
1121 | p.family = AF_INET6; | |
1122 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1123 | IPV6_ADDR_COPY (&p.prefix, addr); | |
1124 | ||
1125 | rn = route_node_match (table, (struct prefix *) &p); | |
1126 | ||
1127 | while (rn) | |
1128 | { | |
1129 | route_unlock_node (rn); | |
1130 | ||
1131 | /* Pick up selected route. */ | |
9fd92e3c | 1132 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1133 | { |
1134 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1135 | continue; | |
1136 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1137 | break; | |
1138 | } | |
718e3744 | 1139 | |
1140 | /* If there is no selected route or matched route is EGP, go up | |
1141 | tree. */ | |
6e26278c | 1142 | if (! match) |
718e3744 | 1143 | { |
1144 | do { | |
1145 | rn = rn->parent; | |
1146 | } while (rn && rn->info == NULL); | |
1147 | if (rn) | |
1148 | route_lock_node (rn); | |
1149 | } | |
1150 | else | |
1151 | { | |
1152 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1153 | /* Directly point connected route. */ | |
1154 | return match; | |
1155 | else | |
1156 | { | |
fa713d9e | 1157 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 1158 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
1159 | return match; | |
1160 | return NULL; | |
1161 | } | |
1162 | } | |
1163 | } | |
1164 | return NULL; | |
1165 | } | |
1166 | #endif /* HAVE_IPV6 */ | |
1167 | ||
7514fb77 PJ |
1168 | #define RIB_SYSTEM_ROUTE(R) \ |
1169 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1170 | ||
dc95824a DO |
1171 | /* This function verifies reachability of one given nexthop, which can be |
1172 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1173 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1174 | * nexthop->ifindex will be updated appropriately as well. | |
1175 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1176 | * not vice versa. | |
1177 | * | |
1178 | * The return value is the final value of 'ACTIVE' flag. | |
1179 | */ | |
1180 | ||
d02c56cd | 1181 | static unsigned |
718e3744 | 1182 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1183 | struct nexthop *nexthop, int set) | |
1184 | { | |
f3a1732e | 1185 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1186 | struct interface *ifp; |
7514fb77 | 1187 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1188 | int family; |
518f0eb1 | 1189 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1190 | |
7a4bb9c5 DS |
1191 | if (rn->p.family == AF_INET) |
1192 | family = AFI_IP; | |
1193 | else if (rn->p.family == AF_INET6) | |
1194 | family = AFI_IP6; | |
1195 | else | |
1196 | family = 0; | |
718e3744 | 1197 | switch (nexthop->type) |
1198 | { | |
1199 | case NEXTHOP_TYPE_IFINDEX: | |
1200 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1201 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1202 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1203 | else | |
1204 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1205 | break; | |
718e3744 | 1206 | case NEXTHOP_TYPE_IPV6_IFNAME: |
7514fb77 PJ |
1207 | family = AFI_IP6; |
1208 | case NEXTHOP_TYPE_IFNAME: | |
718e3744 | 1209 | ifp = if_lookup_by_name (nexthop->ifname); |
3f087670 | 1210 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1211 | { |
1212 | if (set) | |
1213 | nexthop->ifindex = ifp->ifindex; | |
1214 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1215 | } | |
1216 | else | |
1217 | { | |
1218 | if (set) | |
1219 | nexthop->ifindex = 0; | |
1220 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1221 | } | |
1222 | break; | |
1223 | case NEXTHOP_TYPE_IPV4: | |
1224 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1225 | family = AFI_IP; |
718e3744 | 1226 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1227 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1228 | else | |
1229 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1230 | break; | |
1231 | #ifdef HAVE_IPV6 | |
1232 | case NEXTHOP_TYPE_IPV6: | |
7514fb77 | 1233 | family = AFI_IP6; |
718e3744 | 1234 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1235 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1236 | else | |
1237 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1238 | break; | |
1239 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
7514fb77 | 1240 | family = AFI_IP6; |
718e3744 | 1241 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1242 | { | |
1243 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1244 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1245 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1246 | else | |
1247 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1248 | } | |
1249 | else | |
1250 | { | |
1251 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1252 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1253 | else | |
1254 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1255 | } | |
1256 | break; | |
1257 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 1258 | case NEXTHOP_TYPE_BLACKHOLE: |
1259 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1260 | break; | |
718e3744 | 1261 | default: |
1262 | break; | |
1263 | } | |
7514fb77 PJ |
1264 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1265 | return 0; | |
1266 | ||
f3a1732e CF |
1267 | /* XXX: What exactly do those checks do? Do we support |
1268 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1269 | if (RIB_SYSTEM_ROUTE(rib) || |
1270 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1271 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1272 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1273 | ||
f3a1732e CF |
1274 | /* The original code didn't determine the family correctly |
1275 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1276 | * from the rib_table_info in those cases. | |
1277 | * Possibly it may be better to use only the rib_table_info | |
1278 | * in every case. | |
1279 | */ | |
1280 | if (!family) | |
1281 | family = info->afi; | |
1282 | ||
c52ef59f | 1283 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1284 | |
ca84c8ef DS |
1285 | /* It'll get set if required inside */ |
1286 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->tag); | |
7514fb77 | 1287 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1288 | { |
1289 | if (IS_ZEBRA_DEBUG_RIB) | |
1290 | { | |
1291 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1292 | zlog_debug("%s: Filtering out %s with NH out %s due to route map", | |
1293 | __FUNCTION__, buf, nexthop->ifname); | |
1294 | } | |
1295 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1296 | } | |
c52ef59f | 1297 | |
718e3744 | 1298 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1299 | } | |
1300 | ||
03e232a4 DO |
1301 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1302 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1303 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
1304 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
1305 | * transparently passed to nexthop_active_check(). | |
1306 | * | |
1307 | * Return value is the new number of active nexthops. | |
1308 | */ | |
1309 | ||
a1ac18c4 | 1310 | static int |
718e3744 | 1311 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1312 | { | |
1313 | struct nexthop *nexthop; | |
c52ef59f | 1314 | union g_addr prev_src; |
6e26278c DS |
1315 | unsigned int prev_active, prev_index, new_active, old_num_nh; |
1316 | ||
1317 | old_num_nh = rib->nexthop_active_num; | |
718e3744 | 1318 | |
1319 | rib->nexthop_active_num = 0; | |
1320 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1321 | ||
1322 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1323 | { |
c52ef59f DS |
1324 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1325 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1326 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1327 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1328 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1329 | rib->nexthop_active_num++; | |
c52ef59f | 1330 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1331 | if (prev_active != new_active || |
c52ef59f DS |
1332 | prev_index != nexthop->ifindex || |
1333 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1334 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
1335 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr)) | |
6e26278c DS |
1336 | { |
1337 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1338 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1339 | } | |
03e232a4 | 1340 | } |
6e26278c DS |
1341 | |
1342 | if (old_num_nh != rib->nexthop_active_num) | |
1343 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1344 | ||
1345 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_CHANGED)) | |
1346 | { | |
1347 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1348 | } | |
1349 | ||
718e3744 | 1350 | return rib->nexthop_active_num; |
1351 | } | |
6baeb988 | 1352 | |
6b0655a2 | 1353 | |
718e3744 | 1354 | |
6ae24471 DS |
1355 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1356 | * is only used for IPv4. | |
1357 | */ | |
a1ac18c4 | 1358 | static void |
6ae24471 | 1359 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1360 | { |
1361 | int ret = 0; | |
fa713d9e CF |
1362 | struct nexthop *nexthop, *tnexthop; |
1363 | int recursing; | |
718e3744 | 1364 | |
5adc2528 AS |
1365 | /* |
1366 | * Make sure we update the FPM any time we send new information to | |
1367 | * the kernel. | |
1368 | */ | |
1369 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1370 | switch (PREFIX_FAMILY (&rn->p)) |
1371 | { | |
1372 | case AF_INET: | |
6ae24471 DS |
1373 | if (update) |
1374 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1375 | else | |
1376 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1377 | break; |
1378 | #ifdef HAVE_IPV6 | |
1379 | case AF_INET6: | |
1380 | ret = kernel_add_ipv6 (&rn->p, rib); | |
1381 | break; | |
1382 | #endif /* HAVE_IPV6 */ | |
1383 | } | |
1384 | ||
dc95824a | 1385 | /* This condition is never met, if we are using rt_socket.c */ |
718e3744 | 1386 | if (ret < 0) |
1387 | { | |
fa713d9e | 1388 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1389 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1390 | } | |
1391 | } | |
1392 | ||
1393 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1394 | static int |
718e3744 | 1395 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1396 | { | |
1397 | int ret = 0; | |
fa713d9e CF |
1398 | struct nexthop *nexthop, *tnexthop; |
1399 | int recursing; | |
718e3744 | 1400 | |
5adc2528 AS |
1401 | /* |
1402 | * Make sure we update the FPM any time we send new information to | |
1403 | * the kernel. | |
1404 | */ | |
1405 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1406 | ||
718e3744 | 1407 | switch (PREFIX_FAMILY (&rn->p)) |
1408 | { | |
1409 | case AF_INET: | |
1410 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1411 | break; | |
1412 | #ifdef HAVE_IPV6 | |
1413 | case AF_INET6: | |
1414 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1415 | break; | |
1416 | #endif /* HAVE_IPV6 */ | |
1417 | } | |
1418 | ||
fa713d9e | 1419 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1420 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1421 | ||
1422 | return ret; | |
1423 | } | |
1424 | ||
1425 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1426 | static void |
718e3744 | 1427 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1428 | { | |
1429 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1430 | { | |
5adc2528 AS |
1431 | zfpm_trigger_update (rn, "rib_uninstall"); |
1432 | ||
718e3744 | 1433 | redistribute_delete (&rn->p, rib); |
1434 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1435 | rib_uninstall_kernel (rn, rib); | |
1436 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1437 | } | |
1438 | } | |
1439 | ||
6d691129 PJ |
1440 | static void rib_unlink (struct route_node *, struct rib *); |
1441 | ||
9fd92e3c AS |
1442 | /* |
1443 | * rib_can_delete_dest | |
1444 | * | |
1445 | * Returns TRUE if the given dest can be deleted from the table. | |
1446 | */ | |
1447 | static int | |
1448 | rib_can_delete_dest (rib_dest_t *dest) | |
1449 | { | |
1450 | if (dest->routes) | |
1451 | { | |
1452 | return 0; | |
1453 | } | |
1454 | ||
5adc2528 AS |
1455 | /* |
1456 | * Don't delete the dest if we have to update the FPM about this | |
1457 | * prefix. | |
1458 | */ | |
1459 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1460 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1461 | return 0; | |
1462 | ||
9fd92e3c AS |
1463 | return 1; |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * rib_gc_dest | |
1468 | * | |
1469 | * Garbage collect the rib dest corresponding to the given route node | |
1470 | * if appropriate. | |
1471 | * | |
1472 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1473 | */ | |
1474 | int | |
1475 | rib_gc_dest (struct route_node *rn) | |
1476 | { | |
1477 | rib_dest_t *dest; | |
1478 | char buf[INET6_ADDRSTRLEN]; | |
1479 | ||
1480 | dest = rib_dest_from_rnode (rn); | |
1481 | if (!dest) | |
1482 | return 0; | |
1483 | ||
1484 | if (!rib_can_delete_dest (dest)) | |
1485 | return 0; | |
1486 | ||
1487 | if (IS_ZEBRA_DEBUG_RIB) | |
1488 | { | |
1489 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1490 | zlog_debug ("%s: %s/%d: removing dest from table", __func__, | |
1491 | buf, rn->p.prefixlen); | |
1492 | } | |
1493 | ||
1494 | dest->rnode = NULL; | |
1495 | XFREE (MTYPE_RIB_DEST, dest); | |
1496 | rn->info = NULL; | |
1497 | ||
1498 | /* | |
1499 | * Release the one reference that we keep on the route node. | |
1500 | */ | |
1501 | route_unlock_node (rn); | |
1502 | return 1; | |
1503 | } | |
1504 | ||
718e3744 | 1505 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1506 | static void |
1507 | rib_process (struct route_node *rn) | |
718e3744 | 1508 | { |
1509 | struct rib *rib; | |
1510 | struct rib *next; | |
1511 | struct rib *fib = NULL; | |
1512 | struct rib *select = NULL; | |
6d691129 | 1513 | struct rib *del = NULL; |
d753e9ee | 1514 | int installed = 0; |
fa713d9e CF |
1515 | struct nexthop *nexthop = NULL, *tnexthop; |
1516 | int recursing; | |
f304cb48 | 1517 | char buf[INET6_ADDRSTRLEN]; |
6ae24471 | 1518 | int update_ok = 0; |
4d38fdb4 | 1519 | |
1520 | assert (rn); | |
1521 | ||
93bdadae | 1522 | if (IS_ZEBRA_DEBUG_RIB || IS_ZEBRA_DEBUG_RIB_Q) |
f304cb48 | 1523 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1524 | |
9fd92e3c | 1525 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1526 | { |
6e26278c DS |
1527 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1528 | ||
718e3744 | 1529 | /* Currently installed rib. */ |
1530 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1531 | { |
1532 | assert (fib == NULL); | |
1533 | fib = rib; | |
1534 | } | |
ca657c65 | 1535 | |
6d691129 PJ |
1536 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1537 | * which we need to do do further work with below. | |
1538 | */ | |
1539 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1540 | { | |
1541 | if (rib != fib) | |
1542 | { | |
1543 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1544 | zlog_debug ("%s: %s/%d: rn %p, removing rib %p", __func__, |
1545 | buf, rn->p.prefixlen, rn, rib); | |
9fd92e3c | 1546 | rib_unlink (rn, rib); |
6d691129 PJ |
1547 | } |
1548 | else | |
1549 | del = rib; | |
1550 | ||
1551 | continue; | |
1552 | } | |
4d38fdb4 | 1553 | |
718e3744 | 1554 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1555 | /* This first call to nexthop_active_update is merely to determine if |
1556 | * there's any change to nexthops associated with this RIB entry. Now, | |
1557 | * rib_process() can be invoked due to an external event such as link | |
1558 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1559 | * a decision has already been made that the NHs have changed. So, no | |
1560 | * need to invoke a potentially expensive call again. Further, since | |
1561 | * the change might be in a recursive NH which is not caught in | |
1562 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1563 | * recursive NHs. | |
6e26278c | 1564 | */ |
ca657c65 | 1565 | if (!CHECK_FLAG(rib->flags, ZEBRA_FLAG_CHANGED) && |
6e26278c | 1566 | ! nexthop_active_update (rn, rib, 0)) |
7021c425 | 1567 | continue; |
718e3744 | 1568 | |
1569 | /* Infinit distance. */ | |
1570 | if (rib->distance == DISTANCE_INFINITY) | |
8733ba72 DS |
1571 | { |
1572 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1573 | continue; | |
1574 | } | |
718e3744 | 1575 | |
af887b51 | 1576 | /* Newly selected rib, the common case. */ |
1577 | if (!select) | |
1578 | { | |
1579 | select = rib; | |
1580 | continue; | |
1581 | } | |
1582 | ||
1583 | /* filter route selection in following order: | |
af887b51 | 1584 | * - connected beats other types |
a8d9c1f9 | 1585 | * - lower distance beats higher |
af887b51 | 1586 | * - lower metric beats higher for equal distance |
1587 | * - last, hence oldest, route wins tie break. | |
1588 | */ | |
a1038a15 | 1589 | |
1590 | /* Connected routes. Pick the last connected | |
1591 | * route of the set of lowest metric connected routes. | |
1592 | */ | |
a8d9c1f9 | 1593 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1594 | { | |
a1038a15 | 1595 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1596 | || rib->metric <= select->metric) |
8733ba72 DS |
1597 | { |
1598 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1599 | select = rib; | |
1600 | } | |
1601 | else | |
1602 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
a1038a15 | 1603 | continue; |
a8d9c1f9 | 1604 | } |
1605 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
8733ba72 DS |
1606 | { |
1607 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1608 | continue; | |
1609 | } | |
a8d9c1f9 | 1610 | |
1611 | /* higher distance loses */ | |
1612 | if (rib->distance > select->distance) | |
8733ba72 DS |
1613 | { |
1614 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1615 | continue; | |
1616 | } | |
a8d9c1f9 | 1617 | |
1618 | /* lower wins */ | |
1619 | if (rib->distance < select->distance) | |
1620 | { | |
8733ba72 | 1621 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
af887b51 | 1622 | select = rib; |
a8d9c1f9 | 1623 | continue; |
1624 | } | |
1625 | ||
1626 | /* metric tie-breaks equal distance */ | |
1627 | if (rib->metric <= select->metric) | |
8733ba72 DS |
1628 | { |
1629 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1630 | select = rib; | |
1631 | } | |
9fd92e3c | 1632 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1633 | |
1634 | /* After the cycle is finished, the following pointers will be set: | |
1635 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1636 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1637 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1638 | * rib --- NULL | |
1639 | */ | |
1640 | ||
1641 | /* Same RIB entry is selected. Update FIB and finish. */ | |
718e3744 | 1642 | if (select && select == fib) |
1643 | { | |
6d691129 | 1644 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1645 | zlog_debug ("%s: %s/%d: Updating existing route, select %p, fib %p", |
1646 | __func__, buf, rn->p.prefixlen, select, fib); | |
718e3744 | 1647 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1648 | { |
5adc2528 AS |
1649 | zfpm_trigger_update (rn, "updating existing route"); |
1650 | ||
4d38fdb4 | 1651 | redistribute_delete (&rn->p, select); |
6ae24471 | 1652 | |
4d38fdb4 | 1653 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 DS |
1654 | { |
1655 | /* For v4, use the replace semantics of netlink. */ | |
1656 | if (PREFIX_FAMILY (&rn->p) == AF_INET) | |
1657 | update_ok = 1; | |
1658 | else | |
1659 | rib_uninstall_kernel (rn, select); | |
1660 | } | |
1661 | ||
718e3744 | 1662 | |
4d38fdb4 | 1663 | /* Set real nexthop. */ |
6e26278c DS |
1664 | /* Need to check if any NHs are active to clear the |
1665 | * the selected flag | |
1666 | */ | |
1667 | if (nexthop_active_update (rn, select, 1)) | |
1668 | { | |
6ae24471 DS |
1669 | /* Clear FIB flag for IPv4, install will set it */ |
1670 | if (update_ok) | |
1671 | { | |
1672 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) | |
1673 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1674 | } | |
6e26278c | 1675 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1676 | rib_install_kernel (rn, select, update_ok); |
6e26278c DS |
1677 | redistribute_add (&rn->p, select); |
1678 | } | |
1679 | else | |
1680 | { | |
6ae24471 DS |
1681 | /* For IPv4, do the uninstall here. */ |
1682 | if (update_ok) | |
1683 | rib_uninstall_kernel (rn, select); | |
6e26278c DS |
1684 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1685 | } | |
ca657c65 | 1686 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
6e26278c | 1687 | } |
d753e9ee | 1688 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1689 | { |
1690 | /* Housekeeping code to deal with | |
1691 | race conditions in kernel with linux | |
1692 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1693 | is ready to add routes. | |
1694 | This makes sure the routes are IN the kernel. | |
1695 | */ | |
1696 | ||
fa713d9e | 1697 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1698 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1699 | { |
a3aaf5b0 DO |
1700 | installed = 1; |
1701 | break; | |
4d38fdb4 | 1702 | } |
1703 | if (! installed) | |
6ae24471 | 1704 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1705 | } |
6d691129 | 1706 | goto end; |
718e3744 | 1707 | } |
1708 | ||
dc95824a DO |
1709 | /* At this point we either haven't found the best RIB entry or it is |
1710 | * different from what we currently intend to flag with SELECTED. In both | |
1711 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1712 | */ | |
718e3744 | 1713 | if (fib) |
1714 | { | |
6d691129 | 1715 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1716 | zlog_debug ("%s: %s/%d: Removing existing route, fib %p", __func__, |
1717 | buf, rn->p.prefixlen, fib); | |
5adc2528 AS |
1718 | |
1719 | zfpm_trigger_update (rn, "removing existing route"); | |
1720 | ||
718e3744 | 1721 | redistribute_delete (&rn->p, fib); |
6ae24471 | 1722 | |
718e3744 | 1723 | if (! RIB_SYSTEM_ROUTE (fib)) |
6ae24471 DS |
1724 | { |
1725 | /* For v4, use the replace semantics of netlink -- only if there is | |
1726 | * another route to replace this with. | |
1727 | */ | |
1728 | if (PREFIX_FAMILY (&rn->p) == AF_INET) | |
1729 | { | |
1730 | if (!select || RIB_SYSTEM_ROUTE(select)) | |
1731 | rib_uninstall_kernel (rn, fib); | |
1732 | else | |
1733 | update_ok = 1; | |
1734 | } | |
1735 | else | |
1736 | rib_uninstall_kernel (rn, fib); | |
1737 | } | |
718e3744 | 1738 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1739 | ||
1740 | /* Set real nexthop. */ | |
1741 | nexthop_active_update (rn, fib, 1); | |
ca657c65 | 1742 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1743 | } |
1744 | ||
dc95824a DO |
1745 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1746 | * tell, that if a new winner exists, FIB is still not updated with this | |
1747 | * data, but ready to be. | |
1748 | */ | |
718e3744 | 1749 | if (select) |
1750 | { | |
6d691129 | 1751 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1752 | zlog_debug ("%s: %s/%d: Adding route, select %p", __func__, buf, |
1753 | rn->p.prefixlen, select); | |
5adc2528 AS |
1754 | |
1755 | zfpm_trigger_update (rn, "new route selected"); | |
1756 | ||
718e3744 | 1757 | /* Set real nexthop. */ |
6e26278c DS |
1758 | if (nexthop_active_update (rn, select, 1)) |
1759 | { | |
6ae24471 DS |
1760 | /* Clear FIB flag for IPv4 for previous installed route. */ |
1761 | if (update_ok) | |
1762 | { | |
1763 | assert (fib); | |
1764 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1765 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1766 | } | |
6e26278c | 1767 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1768 | rib_install_kernel (rn, select, update_ok); |
6e26278c DS |
1769 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1770 | redistribute_add (&rn->p, select); | |
1771 | } | |
6ae24471 DS |
1772 | else |
1773 | { | |
1774 | /* For IPv4, uninstall prior route here, if any. */ | |
1775 | if (update_ok) | |
1776 | { | |
1777 | assert (fib); | |
1778 | rib_uninstall_kernel (rn, fib); | |
1779 | } | |
1780 | } | |
ca657c65 | 1781 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1782 | } |
4d38fdb4 | 1783 | |
6d691129 PJ |
1784 | /* FIB route was removed, should be deleted */ |
1785 | if (del) | |
1786 | { | |
1787 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1788 | zlog_debug ("%s: %s/%d: Deleting fib %p, rn %p", __func__, buf, |
1789 | rn->p.prefixlen, del, rn); | |
6d691129 PJ |
1790 | rib_unlink (rn, del); |
1791 | } | |
4d38fdb4 | 1792 | |
6d691129 PJ |
1793 | end: |
1794 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
93bdadae | 1795 | zlog_debug ("%s: %s/%d: rn %p dequeued", __func__, buf, rn->p.prefixlen, rn); |
9fd92e3c AS |
1796 | |
1797 | /* | |
1798 | * Check if the dest can be deleted now. | |
1799 | */ | |
1800 | rib_gc_dest (rn); | |
e96f9203 DO |
1801 | } |
1802 | ||
5110a0c6 SH |
1803 | /* Take a list of route_node structs and return 1, if there was a record |
1804 | * picked from it and processed by rib_process(). Don't process more, | |
1805 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1806 | */ |
ef9b113e | 1807 | static unsigned int |
e96f9203 DO |
1808 | process_subq (struct list * subq, u_char qindex) |
1809 | { | |
5110a0c6 | 1810 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1811 | struct route_node *rnode; |
5110a0c6 SH |
1812 | |
1813 | if (!lnode) | |
e96f9203 | 1814 | return 0; |
5110a0c6 | 1815 | |
e96f9203 DO |
1816 | rnode = listgetdata (lnode); |
1817 | rib_process (rnode); | |
5110a0c6 | 1818 | |
9fd92e3c AS |
1819 | if (rnode->info) |
1820 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1821 | ||
67b9467f | 1822 | #if 0 |
5110a0c6 SH |
1823 | else |
1824 | { | |
1825 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1826 | __func__, rnode, rnode->lock); | |
1827 | zlog_backtrace(LOG_DEBUG); | |
1828 | } | |
67b9467f | 1829 | #endif |
e96f9203 DO |
1830 | route_unlock_node (rnode); |
1831 | list_delete_node (subq, lnode); | |
1832 | return 1; | |
1833 | } | |
1834 | ||
fb018d25 DS |
1835 | /* |
1836 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1837 | */ | |
1838 | static void | |
1839 | meta_queue_process_complete (struct work_queue *dummy) | |
1840 | { | |
078430f6 DS |
1841 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
1842 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 | 1843 | #ifdef HAVE_IPV6 |
078430f6 DS |
1844 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); |
1845 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 DS |
1846 | #endif /* HAVE_IPV6 */ |
1847 | } | |
1848 | ||
e96f9203 DO |
1849 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1850 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1851 | * is pointed to the meta queue structure. | |
1852 | */ | |
1853 | static wq_item_status | |
1854 | meta_queue_process (struct work_queue *dummy, void *data) | |
1855 | { | |
1856 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1857 | unsigned i; |
1858 | ||
e96f9203 DO |
1859 | for (i = 0; i < MQ_SIZE; i++) |
1860 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1861 | { |
1862 | mq->size--; | |
1863 | break; | |
1864 | } | |
e96f9203 DO |
1865 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1866 | } | |
1867 | ||
9fd92e3c AS |
1868 | /* |
1869 | * Map from rib types to queue type (priority) in meta queue | |
1870 | */ | |
5110a0c6 SH |
1871 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1872 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1873 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1874 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1875 | [ZEBRA_ROUTE_STATIC] = 1, | |
1876 | [ZEBRA_ROUTE_RIP] = 2, | |
1877 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1878 | [ZEBRA_ROUTE_OSPF] = 2, | |
1879 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1880 | [ZEBRA_ROUTE_ISIS] = 2, | |
1881 | [ZEBRA_ROUTE_BGP] = 3, | |
1882 | [ZEBRA_ROUTE_HSLS] = 4, | |
5734509c | 1883 | [ZEBRA_ROUTE_BABEL] = 2, |
7a4bb9c5 | 1884 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
1885 | }; |
1886 | ||
1887 | /* Look into the RN and queue it into one or more priority queues, | |
1888 | * increasing the size for each data push done. | |
e96f9203 | 1889 | */ |
ef9b113e SH |
1890 | static void |
1891 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1892 | { |
e96f9203 DO |
1893 | struct rib *rib; |
1894 | char buf[INET6_ADDRSTRLEN]; | |
5110a0c6 | 1895 | |
e96f9203 DO |
1896 | if (IS_ZEBRA_DEBUG_RIB_Q) |
1897 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
5110a0c6 | 1898 | |
9fd92e3c | 1899 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1900 | { |
5110a0c6 SH |
1901 | u_char qindex = meta_queue_map[rib->type]; |
1902 | ||
1903 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1904 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1905 | RIB_ROUTE_QUEUED (qindex))) | |
5110a0c6 SH |
1906 | { |
1907 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1908 | zlog_debug ("%s: %s/%d: rn %p is already queued in sub-queue %u", | |
1909 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
1910 | continue; | |
1911 | } | |
1912 | ||
9fd92e3c | 1913 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1914 | listnode_add (mq->subq[qindex], rn); |
1915 | route_lock_node (rn); | |
1916 | mq->size++; | |
1917 | ||
e96f9203 | 1918 | if (IS_ZEBRA_DEBUG_RIB_Q) |
5110a0c6 SH |
1919 | zlog_debug ("%s: %s/%d: queued rn %p into sub-queue %u", |
1920 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
e96f9203 | 1921 | } |
4d38fdb4 | 1922 | } |
1923 | ||
6d691129 | 1924 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 1925 | void |
6d691129 | 1926 | rib_queue_add (struct zebra_t *zebra, struct route_node *rn) |
4d38fdb4 | 1927 | { |
fc328ac9 SV |
1928 | char buf[INET_ADDRSTRLEN]; |
1929 | assert (zebra && rn); | |
4d38fdb4 | 1930 | |
93bdadae | 1931 | if (IS_ZEBRA_DEBUG_RIB_Q) |
fc328ac9 SV |
1932 | inet_ntop (AF_INET, &rn->p.u.prefix, buf, INET_ADDRSTRLEN); |
1933 | ||
1934 | /* Pointless to queue a route_node with no RIB entries to add or remove */ | |
9fd92e3c | 1935 | if (!rnode_to_ribs (rn)) |
6d691129 | 1936 | { |
fc328ac9 SV |
1937 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
1938 | __func__, rn, rn->lock); | |
1939 | zlog_backtrace(LOG_DEBUG); | |
1940 | return; | |
1941 | } | |
1942 | ||
1943 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1944 | zlog_info ("%s: %s/%d: work queue added", __func__, buf, rn->p.prefixlen); | |
1945 | ||
1946 | assert (zebra); | |
4d38fdb4 | 1947 | |
fc328ac9 SV |
1948 | if (zebra->ribq == NULL) |
1949 | { | |
1950 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1951 | return; | |
4d38fdb4 | 1952 | } |
4d38fdb4 | 1953 | |
cc2dd928 SH |
1954 | /* |
1955 | * The RIB queue should normally be either empty or holding the only | |
1956 | * work_queue_item element. In the latter case this element would | |
1957 | * hold a pointer to the meta queue structure, which must be used to | |
1958 | * actually queue the route nodes to process. So create the MQ | |
1959 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1960 | * This semantics was introduced after 0.99.9 release. |
1961 | */ | |
e96f9203 DO |
1962 | if (!zebra->ribq->items->count) |
1963 | work_queue_add (zebra->ribq, zebra->mq); | |
1964 | ||
1965 | rib_meta_queue_add (zebra->mq, rn); | |
fc328ac9 SV |
1966 | |
1967 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1968 | zlog_debug ("%s: %s/%d: rn %p queued", __func__, buf, rn->p.prefixlen, rn); | |
1969 | ||
1970 | return; | |
4d38fdb4 | 1971 | } |
1972 | ||
5110a0c6 SH |
1973 | /* Create new meta queue. |
1974 | A destructor function doesn't seem to be necessary here. | |
1975 | */ | |
ef9b113e SH |
1976 | static struct meta_queue * |
1977 | meta_queue_new (void) | |
e96f9203 DO |
1978 | { |
1979 | struct meta_queue *new; | |
5110a0c6 SH |
1980 | unsigned i; |
1981 | ||
1982 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1983 | assert(new); | |
e96f9203 | 1984 | |
e96f9203 | 1985 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1986 | { |
1987 | new->subq[i] = list_new (); | |
1988 | assert(new->subq[i]); | |
1989 | } | |
1990 | ||
e96f9203 DO |
1991 | return new; |
1992 | } | |
1993 | ||
4d38fdb4 | 1994 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1995 | static void |
4d38fdb4 | 1996 | rib_queue_init (struct zebra_t *zebra) |
1997 | { | |
fc328ac9 SV |
1998 | assert (zebra); |
1999 | ||
4d38fdb4 | 2000 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 2001 | "route_node processing"))) |
4d38fdb4 | 2002 | { |
6d691129 | 2003 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 2004 | return; |
2005 | } | |
2006 | ||
2007 | /* fill in the work queue spec */ | |
e96f9203 | 2008 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2009 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2010 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2011 | /* XXX: TODO: These should be runtime configurable via vty */ |
2012 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2013 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2014 | |
e96f9203 | 2015 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2016 | { |
e96f9203 | 2017 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2018 | return; |
2019 | } | |
2020 | return; | |
718e3744 | 2021 | } |
2022 | ||
6d691129 PJ |
2023 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2024 | * | |
2025 | * The queue length is bounded by the maximal size of the routing table, | |
2026 | * as a route_node will not be requeued, if already queued. | |
2027 | * | |
3c0755dc PJ |
2028 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
2029 | * state, or static_install_ipv{4,6} (when an existing RIB is updated) | |
2030 | * and then submit route_node to queue for best-path selection later. | |
2031 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2032 | * |
2033 | * Deleted RIBs are reaped during best-path selection. | |
2034 | * | |
2035 | * rib_addnode | |
2036 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2037 | * |-------->| | best RIB, if required |
2038 | * | | | |
2039 | * static_install->|->rib_addqueue...... -> rib_process | |
2040 | * | | | |
2041 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2042 | * |-> set RIB_ENTRY_REMOVE | |
2043 | * rib_delnode (RIB freed) | |
2044 | * | |
9fd92e3c AS |
2045 | * The 'info' pointer of a route_node points to a rib_dest_t |
2046 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2047 | * dest is created on-demand by rib_link() and is kept around at least | |
2048 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2049 | * |
2050 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2051 | * | |
2052 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2053 | * - dest attached to route_node: |
2054 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2055 | * - route_node processing queue |
2056 | * - managed by: rib_addqueue, rib_process. | |
2057 | * | |
2058 | */ | |
2059 | ||
718e3744 | 2060 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2061 | static void |
6d691129 | 2062 | rib_link (struct route_node *rn, struct rib *rib) |
718e3744 | 2063 | { |
2064 | struct rib *head; | |
9fd92e3c | 2065 | rib_dest_t *dest; |
f304cb48 | 2066 | char buf[INET6_ADDRSTRLEN]; |
7a4bb9c5 | 2067 | afi_t afi; |
9fd92e3c | 2068 | |
4d38fdb4 | 2069 | assert (rib && rn); |
2070 | ||
6d691129 | 2071 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2072 | { |
f304cb48 | 2073 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2074 | zlog_debug ("%s: %s/%d: rn %p, rib %p", __func__, |
2075 | buf, rn->p.prefixlen, rn, rib); | |
2076 | } | |
6d691129 | 2077 | |
9fd92e3c AS |
2078 | dest = rib_dest_from_rnode (rn); |
2079 | if (!dest) | |
6d691129 PJ |
2080 | { |
2081 | if (IS_ZEBRA_DEBUG_RIB) | |
9fd92e3c AS |
2082 | { |
2083 | zlog_debug ("%s: %s/%d: adding dest to table", __func__, | |
2084 | buf, rn->p.prefixlen); | |
2085 | } | |
2086 | ||
2087 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2088 | route_lock_node (rn); /* rn route table reference */ | |
2089 | rn->info = dest; | |
2090 | dest->rnode = rn; | |
2091 | } | |
2092 | ||
2093 | head = dest->routes; | |
2094 | if (head) | |
2095 | { | |
6d691129 | 2096 | head->prev = rib; |
6d691129 | 2097 | } |
718e3744 | 2098 | rib->next = head; |
9fd92e3c | 2099 | dest->routes = rib; |
7a4bb9c5 DS |
2100 | |
2101 | /* Further processing only if entry is in main table */ | |
2102 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2103 | rib_queue_add (&zebrad, rn); | |
2104 | else | |
2105 | { | |
2106 | if (IS_ZEBRA_DEBUG_RIB) | |
2107 | { | |
2108 | zlog_debug ("%s: %s/%d: Skipping further RIB processing of non-main table", | |
2109 | __func__, buf, rn->p.prefixlen); | |
2110 | } | |
2111 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2112 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2113 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2114 | zebra_add_import_table_entry(rn, rib); | |
2115 | } | |
718e3744 | 2116 | } |
2117 | ||
a1ac18c4 | 2118 | static void |
6d691129 | 2119 | rib_addnode (struct route_node *rn, struct rib *rib) |
718e3744 | 2120 | { |
6d691129 PJ |
2121 | /* RIB node has been un-removed before route-node is processed. |
2122 | * route_node must hence already be on the queue for processing.. | |
2123 | */ | |
2124 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2125 | { | |
2126 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2127 | { |
f304cb48 DO |
2128 | char buf[INET6_ADDRSTRLEN]; |
2129 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2130 | zlog_debug ("%s: %s/%d: rn %p, un-removed rib %p", |
2131 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2132 | } | |
6d691129 PJ |
2133 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2134 | return; | |
2135 | } | |
2136 | rib_link (rn, rib); | |
2137 | } | |
2138 | ||
9fd92e3c AS |
2139 | /* |
2140 | * rib_unlink | |
2141 | * | |
2142 | * Detach a rib structure from a route_node. | |
2143 | * | |
2144 | * Note that a call to rib_unlink() should be followed by a call to | |
2145 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2146 | * longer required to be deleted. | |
2147 | */ | |
6d691129 PJ |
2148 | static void |
2149 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2150 | { | |
f304cb48 | 2151 | char buf[INET6_ADDRSTRLEN]; |
9fd92e3c | 2152 | rib_dest_t *dest; |
6d691129 | 2153 | |
4d38fdb4 | 2154 | assert (rn && rib); |
6d691129 PJ |
2155 | |
2156 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2157 | { |
f304cb48 | 2158 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2159 | zlog_debug ("%s: %s/%d: rn %p, rib %p", |
2160 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2161 | } | |
6d691129 | 2162 | |
9fd92e3c AS |
2163 | dest = rib_dest_from_rnode (rn); |
2164 | ||
718e3744 | 2165 | if (rib->next) |
2166 | rib->next->prev = rib->prev; | |
6d691129 | 2167 | |
718e3744 | 2168 | if (rib->prev) |
2169 | rib->prev->next = rib->next; | |
2170 | else | |
6d691129 | 2171 | { |
9fd92e3c | 2172 | dest->routes = rib->next; |
6d691129 PJ |
2173 | } |
2174 | ||
2175 | /* free RIB and nexthops */ | |
6e26278c | 2176 | nexthops_free(rib->nexthop, rn); |
6d691129 PJ |
2177 | XFREE (MTYPE_RIB, rib); |
2178 | ||
6d691129 PJ |
2179 | } |
2180 | ||
2181 | static void | |
2182 | rib_delnode (struct route_node *rn, struct rib *rib) | |
2183 | { | |
7a4bb9c5 DS |
2184 | afi_t afi; |
2185 | ||
6d691129 | 2186 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2187 | { |
f304cb48 DO |
2188 | char buf[INET6_ADDRSTRLEN]; |
2189 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2190 | zlog_debug ("%s: %s/%d: rn %p, rib %p, removing", __func__, |
2191 | buf, rn->p.prefixlen, rn, rib); | |
2192 | } | |
6d691129 | 2193 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 DS |
2194 | |
2195 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2196 | rib_queue_add (&zebrad, rn); | |
2197 | else | |
2198 | { | |
2199 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2200 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2201 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2202 | zebra_del_import_table_entry(rn, rib); | |
2203 | /* Just clean up if non main table */ | |
2204 | rib_unlink(rn, rib); | |
2205 | } | |
718e3744 | 2206 | } |
2207 | ||
2208 | int | |
7c8ff89e | 2209 | rib_add_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7514fb77 | 2210 | struct in_addr *gate, struct in_addr *src, |
7a4bb9c5 | 2211 | unsigned int ifindex, u_int32_t table_id, |
cddf391b | 2212 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2213 | { |
2214 | struct rib *rib; | |
2215 | struct rib *same = NULL; | |
2216 | struct route_table *table; | |
2217 | struct route_node *rn; | |
2218 | struct nexthop *nexthop; | |
2219 | ||
2220 | /* Lookup table. */ | |
7a4bb9c5 DS |
2221 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2222 | { | |
2223 | table = vrf_table (AFI_IP, safi, 0); | |
2224 | } | |
2225 | else | |
2226 | { | |
2227 | table = vrf_other_route_table (AFI_IP, table_id, 0); | |
2228 | } | |
718e3744 | 2229 | if (! table) |
2230 | return 0; | |
2231 | ||
2232 | /* Make it sure prefixlen is applied to the prefix. */ | |
2233 | apply_mask_ipv4 (p); | |
2234 | ||
2235 | /* Set default distance by route type. */ | |
2236 | if (distance == 0) | |
2237 | { | |
837d16cc | 2238 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
2239 | distance = 150; |
2240 | else | |
2241 | distance = route_info[type].distance; | |
718e3744 | 2242 | |
2243 | /* iBGP distance is 200. */ | |
2244 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2245 | distance = 200; | |
2246 | } | |
2247 | ||
2248 | /* Lookup route node.*/ | |
2249 | rn = route_node_get (table, (struct prefix *) p); | |
2250 | ||
2251 | /* If same type of route are installed, treat it as a implicit | |
2252 | withdraw. */ | |
9fd92e3c | 2253 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2254 | { |
6d691129 PJ |
2255 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2256 | continue; | |
2257 | ||
ebf1ead0 | 2258 | if (rib->type != type) |
2259 | continue; | |
7c8ff89e DS |
2260 | if (rib->instance != instance) |
2261 | continue; | |
7a4bb9c5 | 2262 | |
ebf1ead0 | 2263 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2264 | { |
2265 | same = rib; | |
2266 | break; | |
2267 | } | |
ebf1ead0 | 2268 | /* Duplicate connected route comes in. */ |
2269 | else if ((nexthop = rib->nexthop) && | |
2270 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
2271 | nexthop->ifindex == ifindex && |
2272 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2273 | { |
2274 | rib->refcnt++; | |
2275 | return 0 ; | |
2276 | } | |
718e3744 | 2277 | } |
2278 | ||
2279 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2280 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 2281 | rib->type = type; |
7c8ff89e | 2282 | rib->instance = instance; |
718e3744 | 2283 | rib->distance = distance; |
2284 | rib->flags = flags; | |
2285 | rib->metric = metric; | |
7a4bb9c5 | 2286 | rib->table = table_id; |
718e3744 | 2287 | rib->nexthop_num = 0; |
2288 | rib->uptime = time (NULL); | |
2289 | ||
2290 | /* Nexthop settings. */ | |
2291 | if (gate) | |
2292 | { | |
2293 | if (ifindex) | |
7514fb77 | 2294 | nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 2295 | else |
7514fb77 | 2296 | nexthop_ipv4_add (rib, gate, src); |
718e3744 | 2297 | } |
2298 | else | |
2299 | nexthop_ifindex_add (rib, ifindex); | |
2300 | ||
2301 | /* If this route is kernel route, set FIB flag to the route. */ | |
2302 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2303 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2304 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2305 | ||
2306 | /* Link new rib to node.*/ | |
dc95824a | 2307 | if (IS_ZEBRA_DEBUG_RIB) |
7a4bb9c5 DS |
2308 | { |
2309 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2310 | __func__, rn, rib); | |
2311 | rib_dump ((struct prefix *)p, rib); | |
2312 | } | |
718e3744 | 2313 | rib_addnode (rn, rib); |
4d38fdb4 | 2314 | |
718e3744 | 2315 | /* Free implicit route.*/ |
2316 | if (same) | |
dc95824a DO |
2317 | { |
2318 | if (IS_ZEBRA_DEBUG_RIB) | |
2319 | zlog_debug ("%s: calling rib_delnode (%p, %p)", __func__, rn, rib); | |
4d38fdb4 | 2320 | rib_delnode (rn, same); |
dc95824a | 2321 | } |
4d38fdb4 | 2322 | |
2323 | route_unlock_node (rn); | |
718e3744 | 2324 | return 0; |
2325 | } | |
2326 | ||
dc95824a DO |
2327 | /* This function dumps the contents of a given RIB entry into |
2328 | * standard debug log. Calling function name and IP prefix in | |
2329 | * question are passed as 1st and 2nd arguments. | |
2330 | */ | |
2331 | ||
f7bf4153 DL |
2332 | void _rib_dump (const char * func, |
2333 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2334 | { |
f7bf4153 | 2335 | const struct prefix *p = pp.p; |
fed643f4 | 2336 | char straddr[INET6_ADDRSTRLEN]; |
fa713d9e CF |
2337 | struct nexthop *nexthop, *tnexthop; |
2338 | int recursing; | |
dc95824a | 2339 | |
fed643f4 | 2340 | inet_ntop (p->family, &p->u.prefix, straddr, INET6_ADDRSTRLEN); |
fa713d9e | 2341 | zlog_debug ("%s: dumping RIB entry %p for %s/%d", func, rib, straddr, p->prefixlen); |
dc95824a DO |
2342 | zlog_debug |
2343 | ( | |
7c8ff89e | 2344 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2345 | func, |
2346 | rib->refcnt, | |
d02c56cd | 2347 | (unsigned long) rib->uptime, |
dc95824a | 2348 | rib->type, |
7c8ff89e | 2349 | rib->instance, |
dc95824a DO |
2350 | rib->table |
2351 | ); | |
2352 | zlog_debug | |
2353 | ( | |
2354 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
2355 | func, | |
2356 | rib->metric, | |
2357 | rib->distance, | |
2358 | rib->flags, | |
2359 | rib->status | |
2360 | ); | |
2361 | zlog_debug | |
2362 | ( | |
2363 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2364 | func, | |
2365 | rib->nexthop_num, | |
2366 | rib->nexthop_active_num, | |
2367 | rib->nexthop_fib_num | |
2368 | ); | |
fed643f4 | 2369 | |
fa713d9e CF |
2370 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2371 | { | |
fed643f4 | 2372 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2373 | zlog_debug |
2374 | ( | |
2375 | "%s: %s %s with flags %s%s%s", | |
2376 | func, | |
2377 | (recursing ? " NH" : "NH"), | |
2378 | straddr, | |
2379 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2380 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2381 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2382 | ); | |
2383 | } | |
dc95824a DO |
2384 | zlog_debug ("%s: dump complete", func); |
2385 | } | |
2386 | ||
2387 | /* This is an exported helper to rtm_read() to dump the strange | |
2388 | * RIB entry found by rib_lookup_ipv4_route() | |
2389 | */ | |
2390 | ||
2391 | void rib_lookup_and_dump (struct prefix_ipv4 * p) | |
2392 | { | |
2393 | struct route_table *table; | |
2394 | struct route_node *rn; | |
2395 | struct rib *rib; | |
2396 | char prefix_buf[INET_ADDRSTRLEN]; | |
2397 | ||
2398 | /* Lookup table. */ | |
2399 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2400 | if (! table) | |
2401 | { | |
2402 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
2403 | return; | |
2404 | } | |
2405 | ||
2406 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
2407 | /* Scan the RIB table for exactly matching RIB entry. */ | |
2408 | rn = route_node_lookup (table, (struct prefix *) p); | |
2409 | ||
2410 | /* No route for this prefix. */ | |
2411 | if (! rn) | |
2412 | { | |
2413 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
2414 | return; | |
2415 | } | |
2416 | ||
2417 | /* Unlock node. */ | |
2418 | route_unlock_node (rn); | |
2419 | ||
2420 | /* let's go */ | |
9fd92e3c | 2421 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2422 | { |
2423 | zlog_debug | |
2424 | ( | |
2425 | "%s: rn %p, rib %p: %s, %s", | |
2426 | __func__, | |
2427 | rn, | |
2428 | rib, | |
2429 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
2430 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2431 | ); | |
f7bf4153 | 2432 | rib_dump (p, rib); |
dc95824a DO |
2433 | } |
2434 | } | |
2435 | ||
20e5ff0a DO |
2436 | /* Check if requested address assignment will fail due to another |
2437 | * route being installed by zebra in FIB already. Take necessary | |
2438 | * actions, if needed: remove such a route from FIB and deSELECT | |
2439 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2440 | */ | |
2441 | void rib_lookup_and_pushup (struct prefix_ipv4 * p) | |
2442 | { | |
2443 | struct route_table *table; | |
2444 | struct route_node *rn; | |
2445 | struct rib *rib; | |
2446 | unsigned changed = 0; | |
2447 | ||
2448 | if (NULL == (table = vrf_table (AFI_IP, SAFI_UNICAST, 0))) | |
2449 | { | |
2450 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
2451 | return; | |
2452 | } | |
2453 | ||
2454 | /* No matches would be the simplest case. */ | |
2455 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2456 | return; | |
2457 | ||
2458 | /* Unlock node. */ | |
2459 | route_unlock_node (rn); | |
2460 | ||
2461 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2462 | * the RN into RIBQ head. If the routing message about the new connected | |
2463 | * route (generated by the IP address we are going to assign very soon) | |
2464 | * comes before the RIBQ is processed, the new RIB entry will join | |
2465 | * RIBQ record already on head. This is necessary for proper revalidation | |
2466 | * of the rest of the RIB. | |
2467 | */ | |
9fd92e3c | 2468 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2469 | { |
2470 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2471 | ! RIB_SYSTEM_ROUTE (rib)) | |
2472 | { | |
2473 | changed = 1; | |
2474 | if (IS_ZEBRA_DEBUG_RIB) | |
2475 | { | |
2476 | char buf[INET_ADDRSTRLEN]; | |
2477 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
2478 | zlog_debug ("%s: freeing way for connected prefix %s/%d", __func__, buf, p->prefixlen); | |
f7bf4153 | 2479 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2480 | } |
2481 | rib_uninstall (rn, rib); | |
2482 | } | |
2483 | } | |
2484 | if (changed) | |
20e5ff0a | 2485 | rib_queue_add (&zebrad, rn); |
20e5ff0a DO |
2486 | } |
2487 | ||
718e3744 | 2488 | int |
cddf391b | 2489 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2490 | { |
2491 | struct route_table *table; | |
2492 | struct route_node *rn; | |
2493 | struct rib *same; | |
2494 | struct nexthop *nexthop; | |
04b02fda | 2495 | int ret = 0; |
4d38fdb4 | 2496 | |
718e3744 | 2497 | /* Lookup table. */ |
7a4bb9c5 DS |
2498 | if ((rib->table == zebrad.rtm_table_default) || (rib->table == RT_TABLE_MAIN)) |
2499 | { | |
2500 | table = vrf_table (AFI_IP, safi, 0); | |
2501 | } | |
2502 | else | |
2503 | { | |
2504 | table = vrf_other_route_table (AFI_IP, rib->table, 0); | |
2505 | } | |
718e3744 | 2506 | if (! table) |
2507 | return 0; | |
cddf391b | 2508 | |
718e3744 | 2509 | /* Make it sure prefixlen is applied to the prefix. */ |
2510 | apply_mask_ipv4 (p); | |
2511 | ||
2512 | /* Set default distance by route type. */ | |
2513 | if (rib->distance == 0) | |
2514 | { | |
2515 | rib->distance = route_info[rib->type].distance; | |
2516 | ||
2517 | /* iBGP distance is 200. */ | |
2518 | if (rib->type == ZEBRA_ROUTE_BGP | |
2519 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2520 | rib->distance = 200; | |
2521 | } | |
2522 | ||
2523 | /* Lookup route node.*/ | |
2524 | rn = route_node_get (table, (struct prefix *) p); | |
2525 | ||
2526 | /* If same type of route are installed, treat it as a implicit | |
2527 | withdraw. */ | |
9fd92e3c | 2528 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2529 | { |
0b8c4f1d | 2530 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2531 | continue; |
2532 | ||
7c8ff89e DS |
2533 | if (same->type == rib->type && same->instance == rib->instance |
2534 | && same->table == rib->table | |
718e3744 | 2535 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2536 | break; |
718e3744 | 2537 | } |
4d38fdb4 | 2538 | |
718e3744 | 2539 | /* If this route is kernel route, set FIB flag to the route. */ |
2540 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2541 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2542 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2543 | ||
2544 | /* Link new rib to node.*/ | |
2545 | rib_addnode (rn, rib); | |
04b02fda | 2546 | ret = 1; |
dc95824a DO |
2547 | if (IS_ZEBRA_DEBUG_RIB) |
2548 | { | |
2549 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2550 | __func__, rn, rib); | |
f7bf4153 | 2551 | rib_dump (p, rib); |
dc95824a | 2552 | } |
718e3744 | 2553 | |
718e3744 | 2554 | /* Free implicit route.*/ |
2555 | if (same) | |
dc95824a DO |
2556 | { |
2557 | if (IS_ZEBRA_DEBUG_RIB) | |
2558 | { | |
2559 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
2560 | __func__, rn, same); | |
f7bf4153 | 2561 | rib_dump (p, same); |
dc95824a | 2562 | } |
4d38fdb4 | 2563 | rib_delnode (rn, same); |
04b02fda | 2564 | ret = -1; |
dc95824a | 2565 | } |
4d38fdb4 | 2566 | |
2567 | route_unlock_node (rn); | |
04b02fda | 2568 | return ret; |
718e3744 | 2569 | } |
2570 | ||
ebf1ead0 | 2571 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2572 | int |
7c8ff89e | 2573 | rib_delete_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7a4bb9c5 DS |
2574 | struct in_addr *gate, unsigned int ifindex, |
2575 | u_int32_t table_id, safi_t safi) | |
718e3744 | 2576 | { |
2577 | struct route_table *table; | |
2578 | struct route_node *rn; | |
2579 | struct rib *rib; | |
2580 | struct rib *fib = NULL; | |
2581 | struct rib *same = NULL; | |
fa713d9e CF |
2582 | struct nexthop *nexthop, *tnexthop; |
2583 | int recursing; | |
81cce018 SH |
2584 | char buf1[INET_ADDRSTRLEN]; |
2585 | char buf2[INET_ADDRSTRLEN]; | |
718e3744 | 2586 | |
2587 | /* Lookup table. */ | |
7a4bb9c5 DS |
2588 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2589 | { | |
2590 | table = vrf_table (AFI_IP, safi, 0); | |
2591 | } | |
2592 | else | |
2593 | { | |
2594 | table = vrf_other_route_table(AFI_IP, table_id, 0); | |
2595 | } | |
718e3744 | 2596 | if (! table) |
2597 | return 0; | |
2598 | ||
2599 | /* Apply mask. */ | |
2600 | apply_mask_ipv4 (p); | |
2601 | ||
b52aef18 CF |
2602 | if (IS_ZEBRA_DEBUG_KERNEL) |
2603 | { | |
2604 | if (gate) | |
2605 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", | |
2606 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2607 | p->prefixlen, | |
2608 | inet_ntoa (*gate), | |
2609 | ifindex); | |
2610 | else | |
2611 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d ifindex %d", | |
2612 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2613 | p->prefixlen, | |
2614 | ifindex); | |
2615 | } | |
5ec90d28 | 2616 | |
718e3744 | 2617 | /* Lookup route node. */ |
2618 | rn = route_node_lookup (table, (struct prefix *) p); | |
2619 | if (! rn) | |
2620 | { | |
2621 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2622 | { | |
2623 | if (gate) | |
b6178002 | 2624 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2625 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2626 | p->prefixlen, |
81cce018 | 2627 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2628 | ifindex); |
2629 | else | |
b6178002 | 2630 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2631 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2632 | p->prefixlen, |
2633 | ifindex); | |
2634 | } | |
2635 | return ZEBRA_ERR_RTNOEXIST; | |
2636 | } | |
2637 | ||
2638 | /* Lookup same type route. */ | |
9fd92e3c | 2639 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2640 | { |
6d691129 PJ |
2641 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2642 | continue; | |
2643 | ||
718e3744 | 2644 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2645 | fib = rib; | |
2646 | ||
ebf1ead0 | 2647 | if (rib->type != type) |
2648 | continue; | |
7c8ff89e DS |
2649 | if (rib->instance != instance) |
2650 | continue; | |
ebf1ead0 | 2651 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2652 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2653 | { |
4f1735fd MF |
2654 | if (nexthop->ifindex != ifindex) |
2655 | continue; | |
ebf1ead0 | 2656 | if (rib->refcnt) |
718e3744 | 2657 | { |
ebf1ead0 | 2658 | rib->refcnt--; |
2659 | route_unlock_node (rn); | |
2660 | route_unlock_node (rn); | |
2661 | return 0; | |
718e3744 | 2662 | } |
ebf1ead0 | 2663 | same = rib; |
2664 | break; | |
718e3744 | 2665 | } |
ebf1ead0 | 2666 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2667 | else |
5ec90d28 | 2668 | { |
fa713d9e CF |
2669 | if (gate == NULL) |
2670 | { | |
2671 | same = rib; | |
2672 | break; | |
2673 | } | |
2674 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
2675 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate)) | |
2676 | { | |
2677 | same = rib; | |
2678 | break; | |
2679 | } | |
2680 | if (same) | |
2681 | break; | |
2682 | } | |
718e3744 | 2683 | } |
718e3744 | 2684 | /* If same type of route can't be found and this message is from |
2685 | kernel. */ | |
2686 | if (! same) | |
2687 | { | |
2037f143 DS |
2688 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2689 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2690 | { | |
2691 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2692 | { | |
2693 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
2694 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2695 | p->prefixlen); | |
2696 | } | |
2697 | /* This means someone else, other than Zebra, has deleted | |
2698 | * a Zebra router from the kernel. We will add it back */ | |
6ae24471 | 2699 | rib_install_kernel(rn, fib, 0); |
2037f143 | 2700 | } |
718e3744 | 2701 | else |
2702 | { | |
2703 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2704 | { | |
2705 | if (gate) | |
b6178002 | 2706 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2707 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2708 | p->prefixlen, |
81cce018 | 2709 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2710 | ifindex, |
2711 | type); | |
2712 | else | |
b6178002 | 2713 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2714 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2715 | p->prefixlen, |
2716 | ifindex, | |
2717 | type); | |
2718 | } | |
2719 | route_unlock_node (rn); | |
2720 | return ZEBRA_ERR_RTNOEXIST; | |
2721 | } | |
2722 | } | |
4d38fdb4 | 2723 | |
718e3744 | 2724 | if (same) |
4d38fdb4 | 2725 | rib_delnode (rn, same); |
2726 | ||
718e3744 | 2727 | route_unlock_node (rn); |
718e3744 | 2728 | return 0; |
2729 | } | |
6b0655a2 | 2730 | |
718e3744 | 2731 | /* Install static route into rib. */ |
a1ac18c4 | 2732 | static void |
718e3744 | 2733 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2734 | { | |
2735 | struct rib *rib; | |
2736 | struct route_node *rn; | |
2737 | struct route_table *table; | |
6e26278c | 2738 | struct prefix nh_p; |
718e3744 | 2739 | |
2740 | /* Lookup table. */ | |
2741 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2742 | if (! table) | |
2743 | return; | |
2744 | ||
2745 | /* Lookup existing route */ | |
2746 | rn = route_node_get (table, p); | |
9fd92e3c | 2747 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2748 | { |
2749 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2750 | continue; | |
2751 | ||
2752 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2753 | break; | |
2754 | } | |
718e3744 | 2755 | |
2756 | if (rib) | |
2757 | { | |
0d9551dc DS |
2758 | /* if tag value changed , update old value in RIB */ |
2759 | if (rib->tag != si->tag) | |
2760 | rib->tag = si->tag; | |
2761 | ||
718e3744 | 2762 | /* Same distance static route is there. Update it with new |
2763 | nexthop. */ | |
718e3744 | 2764 | route_unlock_node (rn); |
718e3744 | 2765 | switch (si->type) |
7021c425 | 2766 | { |
2767 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2768 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2769 | nh_p.family = AF_INET; |
2770 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2771 | nh_p.u.prefix4 = si->gate.ipv4; | |
2772 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2773 | break; |
2774 | case STATIC_IPV4_IFNAME: | |
2775 | nexthop_ifname_add (rib, si->gate.ifname); | |
2776 | break; | |
2777 | case STATIC_IPV4_BLACKHOLE: | |
2778 | nexthop_blackhole_add (rib); | |
2779 | break; | |
4d38fdb4 | 2780 | } |
3c0755dc | 2781 | rib_queue_add (&zebrad, rn); |
718e3744 | 2782 | } |
2783 | else | |
2784 | { | |
2785 | /* This is new static route. */ | |
4d38fdb4 | 2786 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2787 | ||
718e3744 | 2788 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 2789 | rib->instance = 0; |
718e3744 | 2790 | rib->distance = si->distance; |
2791 | rib->metric = 0; | |
b0145ddb | 2792 | rib->table = zebrad.rtm_table_default; |
718e3744 | 2793 | rib->nexthop_num = 0; |
0d9551dc | 2794 | rib->tag = si->tag; |
718e3744 | 2795 | |
2796 | switch (si->type) | |
7021c425 | 2797 | { |
2798 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2799 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2800 | nh_p.family = AF_INET; |
2801 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2802 | nh_p.u.prefix4 = si->gate.ipv4; | |
2803 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2804 | break; |
2805 | case STATIC_IPV4_IFNAME: | |
2806 | nexthop_ifname_add (rib, si->gate.ifname); | |
2807 | break; | |
2808 | case STATIC_IPV4_BLACKHOLE: | |
2809 | nexthop_blackhole_add (rib); | |
2810 | break; | |
2811 | } | |
718e3744 | 2812 | |
81dfcaa2 | 2813 | /* Save the flags of this static routes (reject, blackhole) */ |
2814 | rib->flags = si->flags; | |
2815 | ||
718e3744 | 2816 | /* Link this rib to the tree. */ |
2817 | rib_addnode (rn, rib); | |
718e3744 | 2818 | } |
2819 | } | |
2820 | ||
a1ac18c4 | 2821 | static int |
718e3744 | 2822 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
2823 | { | |
2824 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2825 | && si->type == STATIC_IPV4_GATEWAY | |
2826 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
2827 | return 1; | |
2828 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2829 | && si->type == STATIC_IPV4_IFNAME | |
2830 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
2831 | return 1; | |
595db7f1 | 2832 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2833 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2834 | return 1; | |
e8e1946e | 2835 | return 0; |
718e3744 | 2836 | } |
2837 | ||
2838 | /* Uninstall static route from RIB. */ | |
a1ac18c4 | 2839 | static void |
718e3744 | 2840 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2841 | { | |
2842 | struct route_node *rn; | |
2843 | struct rib *rib; | |
2844 | struct nexthop *nexthop; | |
2845 | struct route_table *table; | |
6e26278c | 2846 | struct prefix nh_p; |
718e3744 | 2847 | |
2848 | /* Lookup table. */ | |
2849 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2850 | if (! table) | |
2851 | return; | |
4d38fdb4 | 2852 | |
718e3744 | 2853 | /* Lookup existing route with type and distance. */ |
2854 | rn = route_node_lookup (table, p); | |
2855 | if (! rn) | |
2856 | return; | |
2857 | ||
9fd92e3c | 2858 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2859 | { |
2860 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2861 | continue; | |
2862 | ||
0d9551dc DS |
2863 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
2864 | rib->tag == si->tag) | |
6d691129 PJ |
2865 | break; |
2866 | } | |
718e3744 | 2867 | |
2868 | if (! rib) | |
2869 | { | |
2870 | route_unlock_node (rn); | |
2871 | return; | |
2872 | } | |
2873 | ||
2874 | /* Lookup nexthop. */ | |
2875 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2876 | if (static_ipv4_nexthop_same (nexthop, si)) | |
2877 | break; | |
2878 | ||
2879 | /* Can't find nexthop. */ | |
2880 | if (! nexthop) | |
2881 | { | |
2882 | route_unlock_node (rn); | |
2883 | return; | |
2884 | } | |
2885 | ||
2886 | /* Check nexthop. */ | |
2887 | if (rib->nexthop_num == 1) | |
6d691129 | 2888 | rib_delnode (rn, rib); |
718e3744 | 2889 | else |
2890 | { | |
94ad353d DS |
2891 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
2892 | * the nexthop. There is no need to re-evaluate the route for this | |
2893 | * scenario. | |
2894 | */ | |
2895 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 2896 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d DS |
2897 | { |
2898 | redistribute_delete (&rn->p, rib); | |
6ae24471 | 2899 | /* If there are other active nexthops, do an update. */ |
94ad353d DS |
2900 | if (rib->nexthop_active_num > 1) |
2901 | { | |
6ae24471 | 2902 | rib_install_kernel (rn, rib, 1); |
94ad353d DS |
2903 | redistribute_add (&rn->p, rib); |
2904 | } | |
6ae24471 DS |
2905 | else |
2906 | rib_uninstall_kernel (rn, rib); | |
94ad353d | 2907 | } |
6e26278c | 2908 | |
94ad353d | 2909 | /* Delete the nexthop and dereg from NHT */ |
6e26278c DS |
2910 | nh_p.family = AF_INET; |
2911 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2912 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
319572cc | 2913 | nexthop_delete (rib, nexthop); |
6e26278c DS |
2914 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
2915 | nexthop_free (nexthop, rn); | |
718e3744 | 2916 | } |
718e3744 | 2917 | /* Unlock node. */ |
2918 | route_unlock_node (rn); | |
2919 | } | |
2920 | ||
2921 | /* Add static route into static route configuration. */ | |
2922 | int | |
39db97e4 | 2923 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 2924 | u_char flags, u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 2925 | { |
2926 | u_char type = 0; | |
2927 | struct route_node *rn; | |
2928 | struct static_ipv4 *si; | |
2929 | struct static_ipv4 *pp; | |
2930 | struct static_ipv4 *cp; | |
2931 | struct static_ipv4 *update = NULL; | |
2932 | struct route_table *stable; | |
2933 | ||
2934 | /* Lookup table. */ | |
2935 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2936 | if (! stable) | |
2937 | return -1; | |
2938 | ||
2939 | /* Lookup static route prefix. */ | |
2940 | rn = route_node_get (stable, p); | |
2941 | ||
2942 | /* Make flags. */ | |
2943 | if (gate) | |
2944 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 2945 | else if (ifname) |
718e3744 | 2946 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 2947 | else |
2948 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2949 | |
2950 | /* Do nothing if there is a same static route. */ | |
2951 | for (si = rn->info; si; si = si->next) | |
2952 | { | |
2953 | if (type == si->type | |
2954 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2955 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2956 | { | |
0d9551dc | 2957 | if ((distance == si->distance) && (tag == si->tag)) |
718e3744 | 2958 | { |
2959 | route_unlock_node (rn); | |
2960 | return 0; | |
2961 | } | |
2962 | else | |
2963 | update = si; | |
2964 | } | |
2965 | } | |
2966 | ||
0d9551dc | 2967 | /* Distance or tag changed. */ |
718e3744 | 2968 | if (update) |
0d9551dc | 2969 | static_delete_ipv4 (p, gate, ifname, update->tag, update->distance, vrf_id); |
718e3744 | 2970 | |
2971 | /* Make new static route structure. */ | |
393deb9b | 2972 | si = XCALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
718e3744 | 2973 | |
2974 | si->type = type; | |
2975 | si->distance = distance; | |
81dfcaa2 | 2976 | si->flags = flags; |
0d9551dc | 2977 | si->tag = tag; |
718e3744 | 2978 | |
2979 | if (gate) | |
2980 | si->gate.ipv4 = *gate; | |
2981 | if (ifname) | |
2982 | si->gate.ifname = XSTRDUP (0, ifname); | |
2983 | ||
2984 | /* Add new static route information to the tree with sort by | |
2985 | distance value and gateway address. */ | |
2986 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2987 | { | |
2988 | if (si->distance < cp->distance) | |
2989 | break; | |
2990 | if (si->distance > cp->distance) | |
2991 | continue; | |
2992 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
2993 | { | |
2994 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
2995 | break; | |
2996 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
2997 | continue; | |
2998 | } | |
2999 | } | |
3000 | ||
3001 | /* Make linked list. */ | |
3002 | if (pp) | |
3003 | pp->next = si; | |
3004 | else | |
3005 | rn->info = si; | |
3006 | if (cp) | |
3007 | cp->prev = si; | |
3008 | si->prev = pp; | |
3009 | si->next = cp; | |
3010 | ||
3011 | /* Install into rib. */ | |
3012 | static_install_ipv4 (p, si); | |
3013 | ||
3014 | return 1; | |
3015 | } | |
3016 | ||
3017 | /* Delete static route from static route configuration. */ | |
3018 | int | |
39db97e4 | 3019 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 3020 | u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 3021 | { |
3022 | u_char type = 0; | |
3023 | struct route_node *rn; | |
3024 | struct static_ipv4 *si; | |
3025 | struct route_table *stable; | |
3026 | ||
3027 | /* Lookup table. */ | |
3028 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
3029 | if (! stable) | |
3030 | return -1; | |
3031 | ||
3032 | /* Lookup static route prefix. */ | |
3033 | rn = route_node_lookup (stable, p); | |
3034 | if (! rn) | |
3035 | return 0; | |
3036 | ||
3037 | /* Make flags. */ | |
3038 | if (gate) | |
3039 | type = STATIC_IPV4_GATEWAY; | |
3040 | else if (ifname) | |
3041 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 3042 | else |
3043 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 3044 | |
3045 | /* Find same static route is the tree */ | |
3046 | for (si = rn->info; si; si = si->next) | |
3047 | if (type == si->type | |
3048 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
0d9551dc DS |
3049 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0) |
3050 | && (! tag || (tag == si->tag))) | |
718e3744 | 3051 | break; |
3052 | ||
3053 | /* Can't find static route. */ | |
3054 | if (! si) | |
3055 | { | |
3056 | route_unlock_node (rn); | |
3057 | return 0; | |
3058 | } | |
3059 | ||
3060 | /* Install into rib. */ | |
3061 | static_uninstall_ipv4 (p, si); | |
3062 | ||
3063 | /* Unlink static route from linked list. */ | |
3064 | if (si->prev) | |
3065 | si->prev->next = si->next; | |
3066 | else | |
3067 | rn->info = si->next; | |
3068 | if (si->next) | |
3069 | si->next->prev = si->prev; | |
143a385f | 3070 | route_unlock_node (rn); |
718e3744 | 3071 | |
3072 | /* Free static route configuration. */ | |
a0f6acd8 | 3073 | if (ifname) |
3074 | XFREE (0, si->gate.ifname); | |
718e3744 | 3075 | XFREE (MTYPE_STATIC_IPV4, si); |
3076 | ||
143a385f | 3077 | route_unlock_node (rn); |
3078 | ||
718e3744 | 3079 | return 1; |
3080 | } | |
3081 | ||
6b0655a2 | 3082 | |
718e3744 | 3083 | #ifdef HAVE_IPV6 |
41fc2714 | 3084 | int |
718e3744 | 3085 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
3086 | struct in6_addr *gate, unsigned int ifindex, int table) | |
3087 | { | |
726f9b2b | 3088 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
3089 | #if defined (MUSICA) || defined (LINUX) | |
3090 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
3091 | if (p->prefixlen == 96) | |
3092 | return 0; | |
3093 | #endif /* MUSICA */ | |
718e3744 | 3094 | return 1; |
726f9b2b | 3095 | } |
718e3744 | 3096 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
3097 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
3098 | { | |
3099 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
3100 | return 1; | |
3101 | } | |
3102 | return 0; | |
3103 | } | |
3104 | ||
3105 | int | |
7c8ff89e | 3106 | rib_add_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3107 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, |
f768f367 | 3108 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 3109 | { |
3110 | struct rib *rib; | |
3111 | struct rib *same = NULL; | |
3112 | struct route_table *table; | |
3113 | struct route_node *rn; | |
3114 | struct nexthop *nexthop; | |
3115 | ||
718e3744 | 3116 | /* Lookup table. */ |
7a4bb9c5 DS |
3117 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3118 | { | |
3119 | table = vrf_table (AFI_IP6, safi, 0); | |
3120 | } | |
3121 | else | |
3122 | { | |
3123 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3124 | } | |
718e3744 | 3125 | if (! table) |
3126 | return 0; | |
3127 | ||
3128 | /* Make sure mask is applied. */ | |
3129 | apply_mask_ipv6 (p); | |
3130 | ||
3131 | /* Set default distance by route type. */ | |
be61c4eb | 3132 | if (!distance) |
3133 | distance = route_info[type].distance; | |
718e3744 | 3134 | |
3135 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
3136 | distance = 200; | |
3137 | ||
3138 | /* Filter bogus route. */ | |
3139 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
3140 | return 0; | |
3141 | ||
3142 | /* Lookup route node.*/ | |
3143 | rn = route_node_get (table, (struct prefix *) p); | |
3144 | ||
3145 | /* If same type of route are installed, treat it as a implicit | |
3146 | withdraw. */ | |
9fd92e3c | 3147 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3148 | { |
6d691129 PJ |
3149 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3150 | continue; | |
3151 | ||
ebf1ead0 | 3152 | if (rib->type != type) |
3153 | continue; | |
7c8ff89e DS |
3154 | if (rib->instance != instance) |
3155 | continue; | |
ebf1ead0 | 3156 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 3157 | { |
3158 | same = rib; | |
718e3744 | 3159 | break; |
3160 | } | |
ebf1ead0 | 3161 | else if ((nexthop = rib->nexthop) && |
3162 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3163 | nexthop->ifindex == ifindex) | |
3164 | { | |
3165 | rib->refcnt++; | |
3166 | return 0; | |
3167 | } | |
718e3744 | 3168 | } |
3169 | ||
3170 | /* Allocate new rib structure. */ | |
4d38fdb4 | 3171 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3172 | ||
718e3744 | 3173 | rib->type = type; |
7c8ff89e | 3174 | rib->instance = instance; |
718e3744 | 3175 | rib->distance = distance; |
3176 | rib->flags = flags; | |
3177 | rib->metric = metric; | |
7a4bb9c5 | 3178 | rib->table = table_id; |
718e3744 | 3179 | rib->nexthop_num = 0; |
3180 | rib->uptime = time (NULL); | |
3181 | ||
3182 | /* Nexthop settings. */ | |
3183 | if (gate) | |
3184 | { | |
3185 | if (ifindex) | |
3186 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
3187 | else | |
3188 | nexthop_ipv6_add (rib, gate); | |
3189 | } | |
3190 | else | |
3191 | nexthop_ifindex_add (rib, ifindex); | |
3192 | ||
3193 | /* If this route is kernel route, set FIB flag to the route. */ | |
3194 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
3195 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3196 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3197 | ||
3198 | /* Link new rib to node.*/ | |
3199 | rib_addnode (rn, rib); | |
fed643f4 VB |
3200 | if (IS_ZEBRA_DEBUG_RIB) |
3201 | { | |
3202 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
3203 | __func__, rn, rib); | |
f7bf4153 | 3204 | rib_dump (p, rib); |
fed643f4 | 3205 | } |
718e3744 | 3206 | |
718e3744 | 3207 | /* Free implicit route.*/ |
3208 | if (same) | |
fed643f4 VB |
3209 | { |
3210 | if (IS_ZEBRA_DEBUG_RIB) | |
3211 | { | |
3212 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3213 | __func__, rn, same); | |
f7bf4153 | 3214 | rib_dump (p, same); |
fed643f4 | 3215 | } |
4d38fdb4 | 3216 | rib_delnode (rn, same); |
fed643f4 | 3217 | } |
4d38fdb4 | 3218 | |
3219 | route_unlock_node (rn); | |
718e3744 | 3220 | return 0; |
3221 | } | |
3222 | ||
41fc2714 | 3223 | int |
8a92a8a0 | 3224 | rib_add_ipv6_multipath (struct prefix *p, struct rib *rib, safi_t safi, |
41fc2714 DS |
3225 | unsigned long ifindex) |
3226 | { | |
3227 | struct route_table *table; | |
3228 | struct route_node *rn; | |
3229 | struct rib *same = NULL; | |
3230 | struct nexthop *nexthop; | |
3231 | int ret = 0; | |
4e3afb14 | 3232 | unsigned int table_id = 0; |
41fc2714 | 3233 | |
8a92a8a0 | 3234 | if (p->family == AF_INET) |
7a4bb9c5 | 3235 | { |
8a92a8a0 DS |
3236 | if (!rib) |
3237 | return 0; | |
3238 | ||
3239 | table = vrf_table (AFI_IP, safi, 0); | |
3240 | if (!table) | |
3241 | return 0; | |
3242 | /* Make it sure prefixlen is applied to the prefix. */ | |
3243 | apply_mask_ipv4 (p); | |
7a4bb9c5 DS |
3244 | } |
3245 | else | |
3246 | { | |
8a92a8a0 DS |
3247 | if (rib) |
3248 | table_id = rib->table; | |
3249 | else | |
3250 | return 0; /* why are we getting called with NULL rib */ | |
41fc2714 | 3251 | |
8a92a8a0 DS |
3252 | /* Lookup table. */ |
3253 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
3254 | { | |
3255 | table = vrf_table (AFI_IP6, safi, 0); | |
3256 | } | |
3257 | else | |
3258 | { | |
3259 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3260 | } | |
41fc2714 | 3261 | |
8a92a8a0 DS |
3262 | if (! table) |
3263 | return 0; | |
3264 | ||
3265 | /* Make sure mask is applied. */ | |
3266 | apply_mask_ipv6 (p); | |
3267 | ||
3268 | } | |
41fc2714 DS |
3269 | |
3270 | /* Set default distance by route type. */ | |
3271 | if (rib->distance == 0) | |
3272 | { | |
3273 | rib->distance = route_info[rib->type].distance; | |
3274 | ||
3275 | /* iBGP distance is 200. */ | |
3276 | if (rib->type == ZEBRA_ROUTE_BGP | |
3277 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
3278 | rib->distance = 200; | |
3279 | } | |
3280 | ||
3281 | /* Lookup route node.*/ | |
3282 | rn = route_node_get (table, (struct prefix *) p); | |
3283 | ||
3284 | /* If same type of route are installed, treat it as a implicit | |
3285 | withdraw. */ | |
3286 | RNODE_FOREACH_RIB (rn, same) { | |
3287 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
3288 | continue; | |
3289 | } | |
3290 | if (same->type != rib->type) { | |
3291 | continue; | |
3292 | } | |
3293 | ||
7c8ff89e DS |
3294 | if (same->instance != rib->instance) { |
3295 | continue; | |
3296 | } | |
3297 | ||
41fc2714 DS |
3298 | if (same->table != rib->table) { |
3299 | continue; | |
3300 | } | |
3301 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
3302 | break; | |
3303 | } | |
3304 | else if ((nexthop = same->nexthop) && | |
3305 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3306 | nexthop->ifindex == ifindex) { | |
3307 | same->refcnt++; | |
3308 | return 0; | |
3309 | } | |
3310 | } | |
3311 | ||
3312 | /* If this route is kernel route, set FIB flag to the route. */ | |
3313 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
3314 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
3315 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3316 | } | |
3317 | } | |
3318 | ||
3319 | /* Link new rib to node.*/ | |
3320 | rib_addnode (rn, rib); | |
3321 | ret = 1; | |
3322 | /* Free implicit route.*/ | |
3323 | if (same) | |
3324 | { | |
3325 | if (IS_ZEBRA_DEBUG_RIB) | |
3326 | { | |
3327 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3328 | __func__, rn, same); | |
3329 | rib_dump ((struct prefix *)p, same); | |
3330 | } | |
3331 | rib_delnode (rn, same); | |
3332 | ret = -1; | |
3333 | } | |
3334 | ||
3335 | route_unlock_node (rn); | |
3336 | return ret; | |
3337 | } | |
3338 | ||
ebf1ead0 | 3339 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 3340 | int |
7c8ff89e | 3341 | rib_delete_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3342 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, safi_t safi) |
718e3744 | 3343 | { |
3344 | struct route_table *table; | |
3345 | struct route_node *rn; | |
3346 | struct rib *rib; | |
3347 | struct rib *fib = NULL; | |
3348 | struct rib *same = NULL; | |
fa713d9e CF |
3349 | struct nexthop *nexthop, *tnexthop; |
3350 | int recursing; | |
81cce018 SH |
3351 | char buf1[INET6_ADDRSTRLEN]; |
3352 | char buf2[INET6_ADDRSTRLEN]; | |
718e3744 | 3353 | |
3354 | /* Apply mask. */ | |
3355 | apply_mask_ipv6 (p); | |
3356 | ||
3357 | /* Lookup table. */ | |
7a4bb9c5 DS |
3358 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3359 | { | |
3360 | table = vrf_table (AFI_IP6, safi, 0); | |
3361 | } | |
3362 | else | |
3363 | { | |
3364 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3365 | } | |
718e3744 | 3366 | if (! table) |
3367 | return 0; | |
4d38fdb4 | 3368 | |
718e3744 | 3369 | /* Lookup route node. */ |
3370 | rn = route_node_lookup (table, (struct prefix *) p); | |
3371 | if (! rn) | |
3372 | { | |
3373 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3374 | { | |
3375 | if (gate) | |
b6178002 | 3376 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 3377 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3378 | p->prefixlen, |
81cce018 | 3379 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3380 | ifindex); |
3381 | else | |
b6178002 | 3382 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 3383 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3384 | p->prefixlen, |
3385 | ifindex); | |
3386 | } | |
3387 | return ZEBRA_ERR_RTNOEXIST; | |
3388 | } | |
3389 | ||
3390 | /* Lookup same type route. */ | |
9fd92e3c | 3391 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3392 | { |
6d691129 PJ |
3393 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
3394 | continue; | |
3395 | ||
718e3744 | 3396 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3397 | fib = rib; | |
3398 | ||
ebf1ead0 | 3399 | if (rib->type != type) |
3400 | continue; | |
7c8ff89e DS |
3401 | if (rib->instance != instance) |
3402 | continue; | |
ebf1ead0 | 3403 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 3404 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 3405 | { |
4f1735fd MF |
3406 | if (nexthop->ifindex != ifindex) |
3407 | continue; | |
ebf1ead0 | 3408 | if (rib->refcnt) |
718e3744 | 3409 | { |
ebf1ead0 | 3410 | rib->refcnt--; |
3411 | route_unlock_node (rn); | |
3412 | route_unlock_node (rn); | |
3413 | return 0; | |
718e3744 | 3414 | } |
ebf1ead0 | 3415 | same = rib; |
3416 | break; | |
718e3744 | 3417 | } |
ebf1ead0 | 3418 | /* Make sure that the route found has the same gateway. */ |
fa713d9e CF |
3419 | else |
3420 | { | |
3421 | if (gate == NULL) | |
3422 | { | |
3423 | same = rib; | |
3424 | break; | |
3425 | } | |
3426 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
3427 | if (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
3428 | { | |
3429 | same = rib; | |
3430 | break; | |
3431 | } | |
3432 | if (same) | |
3433 | break; | |
3434 | } | |
718e3744 | 3435 | } |
3436 | ||
3437 | /* If same type of route can't be found and this message is from | |
3438 | kernel. */ | |
3439 | if (! same) | |
3440 | { | |
2037f143 DS |
3441 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
3442 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
3443 | { | |
3444 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3445 | { | |
3446 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
3447 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
3448 | p->prefixlen); | |
3449 | } | |
3450 | /* This means someone else, other than Zebra, has deleted a Zebra | |
3451 | * route from the kernel. We will add it back */ | |
6ae24471 | 3452 | rib_install_kernel(rn, fib, 0); |
2037f143 | 3453 | } |
718e3744 | 3454 | else |
3455 | { | |
3456 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3457 | { | |
3458 | if (gate) | |
b6178002 | 3459 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 3460 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3461 | p->prefixlen, |
81cce018 | 3462 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3463 | ifindex, |
3464 | type); | |
3465 | else | |
b6178002 | 3466 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 3467 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3468 | p->prefixlen, |
3469 | ifindex, | |
3470 | type); | |
3471 | } | |
3472 | route_unlock_node (rn); | |
3473 | return ZEBRA_ERR_RTNOEXIST; | |
3474 | } | |
3475 | } | |
3476 | ||
718e3744 | 3477 | if (same) |
4d38fdb4 | 3478 | rib_delnode (rn, same); |
3479 | ||
718e3744 | 3480 | route_unlock_node (rn); |
718e3744 | 3481 | return 0; |
3482 | } | |
6b0655a2 | 3483 | |
718e3744 | 3484 | /* Install static route into rib. */ |
a1ac18c4 | 3485 | static void |
718e3744 | 3486 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3487 | { | |
3488 | struct rib *rib; | |
3489 | struct route_table *table; | |
3490 | struct route_node *rn; | |
6e26278c | 3491 | struct prefix nh_p; |
718e3744 | 3492 | |
3493 | /* Lookup table. */ | |
3494 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3495 | if (! table) | |
3496 | return; | |
3497 | ||
3498 | /* Lookup existing route */ | |
3499 | rn = route_node_get (table, p); | |
9fd92e3c | 3500 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3501 | { |
3502 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) | |
3503 | continue; | |
3504 | ||
3505 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
3506 | break; | |
3507 | } | |
718e3744 | 3508 | |
3509 | if (rib) | |
3510 | { | |
0d9551dc DS |
3511 | /* if tag value changed , update old value in RIB */ |
3512 | if (rib->tag != si->tag) | |
3513 | rib->tag = si->tag; | |
3514 | ||
718e3744 | 3515 | /* Same distance static route is there. Update it with new |
3516 | nexthop. */ | |
718e3744 | 3517 | route_unlock_node (rn); |
3518 | ||
3519 | switch (si->type) | |
3520 | { | |
3521 | case STATIC_IPV6_GATEWAY: | |
3522 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3523 | nh_p.family = AF_INET6; |
3524 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3525 | nh_p.u.prefix6 = si->ipv6; | |
3526 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3527 | break; |
3528 | case STATIC_IPV6_IFNAME: | |
3529 | nexthop_ifname_add (rib, si->ifname); | |
3530 | break; | |
3531 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3532 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3533 | break; | |
3534 | } | |
3c0755dc | 3535 | rib_queue_add (&zebrad, rn); |
718e3744 | 3536 | } |
3537 | else | |
3538 | { | |
3539 | /* This is new static route. */ | |
4d38fdb4 | 3540 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3541 | ||
718e3744 | 3542 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 3543 | rib->instance = 0; |
718e3744 | 3544 | rib->distance = si->distance; |
3545 | rib->metric = 0; | |
4595531e | 3546 | rib->table = zebrad.rtm_table_default; |
718e3744 | 3547 | rib->nexthop_num = 0; |
0d9551dc | 3548 | rib->tag = si->tag; |
718e3744 | 3549 | |
3550 | switch (si->type) | |
3551 | { | |
3552 | case STATIC_IPV6_GATEWAY: | |
3553 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3554 | nh_p.family = AF_INET6; |
3555 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3556 | nh_p.u.prefix6 = si->ipv6; | |
3557 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3558 | break; |
3559 | case STATIC_IPV6_IFNAME: | |
3560 | nexthop_ifname_add (rib, si->ifname); | |
3561 | break; | |
3562 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3563 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3564 | break; | |
3565 | } | |
3566 | ||
81dfcaa2 | 3567 | /* Save the flags of this static routes (reject, blackhole) */ |
3568 | rib->flags = si->flags; | |
3569 | ||
718e3744 | 3570 | /* Link this rib to the tree. */ |
3571 | rib_addnode (rn, rib); | |
718e3744 | 3572 | } |
3573 | } | |
3574 | ||
a1ac18c4 | 3575 | static int |
718e3744 | 3576 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
3577 | { | |
3578 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
3579 | && si->type == STATIC_IPV6_GATEWAY | |
3580 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
3581 | return 1; | |
3582 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
3583 | && si->type == STATIC_IPV6_IFNAME | |
3584 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3585 | return 1; | |
3586 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
3587 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
3588 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
3589 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3590 | return 1; | |
e8e1946e | 3591 | return 0; |
718e3744 | 3592 | } |
3593 | ||
a1ac18c4 | 3594 | static void |
718e3744 | 3595 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3596 | { | |
3597 | struct route_table *table; | |
3598 | struct route_node *rn; | |
3599 | struct rib *rib; | |
3600 | struct nexthop *nexthop; | |
6e26278c | 3601 | struct prefix nh_p; |
718e3744 | 3602 | |
3603 | /* Lookup table. */ | |
3604 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3605 | if (! table) | |
3606 | return; | |
3607 | ||
3608 | /* Lookup existing route with type and distance. */ | |
3609 | rn = route_node_lookup (table, (struct prefix *) p); | |
3610 | if (! rn) | |
3611 | return; | |
3612 | ||
9fd92e3c | 3613 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3614 | { |
3615 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
3616 | continue; | |
3617 | ||
0d9551dc DS |
3618 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
3619 | rib->tag == si->tag) | |
6d691129 PJ |
3620 | break; |
3621 | } | |
3622 | ||
718e3744 | 3623 | if (! rib) |
3624 | { | |
3625 | route_unlock_node (rn); | |
3626 | return; | |
3627 | } | |
3628 | ||
3629 | /* Lookup nexthop. */ | |
3630 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3631 | if (static_ipv6_nexthop_same (nexthop, si)) | |
3632 | break; | |
3633 | ||
3634 | /* Can't find nexthop. */ | |
3635 | if (! nexthop) | |
3636 | { | |
3637 | route_unlock_node (rn); | |
3638 | return; | |
3639 | } | |
3640 | ||
3641 | /* Check nexthop. */ | |
3642 | if (rib->nexthop_num == 1) | |
3643 | { | |
3644 | rib_delnode (rn, rib); | |
718e3744 | 3645 | } |
3646 | else | |
3647 | { | |
94ad353d DS |
3648 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
3649 | * the nexthop. There is no need to re-evaluate the route for this | |
3650 | * scenario. | |
3651 | */ | |
3652 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 3653 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d DS |
3654 | { |
3655 | redistribute_delete (&rn->p, rib); | |
3656 | rib_uninstall_kernel (rn, rib); | |
3657 | /* Are there other active nexthops? */ | |
3658 | if (rib->nexthop_active_num > 1) | |
3659 | { | |
6ae24471 | 3660 | rib_install_kernel (rn, rib, 0); |
94ad353d DS |
3661 | redistribute_add (&rn->p, rib); |
3662 | } | |
3663 | } | |
6e26278c | 3664 | |
94ad353d | 3665 | /* Delete the nexthop and dereg from NHT */ |
6e26278c DS |
3666 | nh_p.family = AF_INET6; |
3667 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3668 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
319572cc | 3669 | nexthop_delete (rib, nexthop); |
6e26278c DS |
3670 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
3671 | nexthop_free (nexthop, rn); | |
718e3744 | 3672 | } |
718e3744 | 3673 | /* Unlock node. */ |
3674 | route_unlock_node (rn); | |
3675 | } | |
3676 | ||
3677 | /* Add static route into static route configuration. */ | |
3678 | int | |
3679 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3680 | const char *ifname, u_char flags, u_short tag, |
3681 | u_char distance, u_int32_t vrf_id) | |
718e3744 | 3682 | { |
3683 | struct route_node *rn; | |
3684 | struct static_ipv6 *si; | |
3685 | struct static_ipv6 *pp; | |
3686 | struct static_ipv6 *cp; | |
3687 | struct route_table *stable; | |
3688 | ||
3689 | /* Lookup table. */ | |
3690 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
3691 | if (! stable) | |
3692 | return -1; | |
27b47253 PJ |
3693 | |
3694 | if (!gate && | |
3695 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
3696 | return -1; | |
3697 | ||
3698 | if (!ifname && | |
3699 | (type == STATIC_IPV6_GATEWAY_IFNAME || type == STATIC_IPV6_IFNAME)) | |
3700 | return -1; | |
718e3744 | 3701 | |
3702 | /* Lookup static route prefix. */ | |
3703 | rn = route_node_get (stable, p); | |
3704 | ||
3705 | /* Do nothing if there is a same static route. */ | |
3706 | for (si = rn->info; si; si = si->next) | |
3707 | { | |
3708 | if (distance == si->distance | |
3709 | && type == si->type | |
0d9551dc | 3710 | && tag == si->tag |
718e3744 | 3711 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) |
3712 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
3713 | { | |
3714 | route_unlock_node (rn); | |
3715 | return 0; | |
3716 | } | |
3717 | } | |
3718 | ||
3719 | /* Make new static route structure. */ | |
393deb9b | 3720 | si = XCALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
718e3744 | 3721 | |
3722 | si->type = type; | |
3723 | si->distance = distance; | |
81dfcaa2 | 3724 | si->flags = flags; |
0d9551dc | 3725 | si->tag = tag; |
718e3744 | 3726 | |
3727 | switch (type) | |
3728 | { | |
3729 | case STATIC_IPV6_GATEWAY: | |
3730 | si->ipv6 = *gate; | |
3731 | break; | |
3732 | case STATIC_IPV6_IFNAME: | |
3733 | si->ifname = XSTRDUP (0, ifname); | |
3734 | break; | |
3735 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3736 | si->ipv6 = *gate; | |
3737 | si->ifname = XSTRDUP (0, ifname); | |
3738 | break; | |
3739 | } | |
3740 | ||
3741 | /* Add new static route information to the tree with sort by | |
3742 | distance value and gateway address. */ | |
3743 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3744 | { | |
3745 | if (si->distance < cp->distance) | |
3746 | break; | |
3747 | if (si->distance > cp->distance) | |
3748 | continue; | |
3749 | } | |
3750 | ||
3751 | /* Make linked list. */ | |
3752 | if (pp) | |
3753 | pp->next = si; | |
3754 | else | |
3755 | rn->info = si; | |
3756 | if (cp) | |
3757 | cp->prev = si; | |
3758 | si->prev = pp; | |
3759 | si->next = cp; | |
3760 | ||
3761 | /* Install into rib. */ | |
3762 | static_install_ipv6 (p, si); | |
3763 | ||
3764 | return 1; | |
3765 | } | |
3766 | ||
3767 | /* Delete static route from static route configuration. */ | |
3768 | int | |
3769 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3770 | const char *ifname, u_short tag, u_char distance, |
3771 | u_int32_t vrf_id) | |
718e3744 | 3772 | { |
3773 | struct route_node *rn; | |
3774 | struct static_ipv6 *si; | |
3775 | struct route_table *stable; | |
3776 | ||
3777 | /* Lookup table. */ | |
3778 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
3779 | if (! stable) | |
3780 | return -1; | |
3781 | ||
3782 | /* Lookup static route prefix. */ | |
3783 | rn = route_node_lookup (stable, p); | |
3784 | if (! rn) | |
3785 | return 0; | |
3786 | ||
3787 | /* Find same static route is the tree */ | |
3788 | for (si = rn->info; si; si = si->next) | |
3789 | if (distance == si->distance | |
3790 | && type == si->type | |
3791 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
0d9551dc DS |
3792 | && (! ifname || strcmp (ifname, si->ifname) == 0) |
3793 | && (! tag || (tag == si->tag))) | |
718e3744 | 3794 | break; |
3795 | ||
3796 | /* Can't find static route. */ | |
3797 | if (! si) | |
3798 | { | |
3799 | route_unlock_node (rn); | |
3800 | return 0; | |
3801 | } | |
3802 | ||
3803 | /* Install into rib. */ | |
3804 | static_uninstall_ipv6 (p, si); | |
3805 | ||
3806 | /* Unlink static route from linked list. */ | |
3807 | if (si->prev) | |
3808 | si->prev->next = si->next; | |
3809 | else | |
3810 | rn->info = si->next; | |
3811 | if (si->next) | |
3812 | si->next->prev = si->prev; | |
3813 | ||
3814 | /* Free static route configuration. */ | |
a0f6acd8 | 3815 | if (ifname) |
3816 | XFREE (0, si->ifname); | |
718e3744 | 3817 | XFREE (MTYPE_STATIC_IPV6, si); |
3818 | ||
3819 | return 1; | |
3820 | } | |
3821 | #endif /* HAVE_IPV6 */ | |
6b0655a2 | 3822 | |
718e3744 | 3823 | /* RIB update function. */ |
3824 | void | |
a1ac18c4 | 3825 | rib_update (void) |
718e3744 | 3826 | { |
3827 | struct route_node *rn; | |
3828 | struct route_table *table; | |
4d38fdb4 | 3829 | |
718e3744 | 3830 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
3831 | if (table) | |
3832 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3833 | if (rnode_to_ribs (rn)) |
6d691129 | 3834 | rib_queue_add (&zebrad, rn); |
718e3744 | 3835 | |
3836 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3837 | if (table) | |
3838 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3839 | if (rnode_to_ribs (rn)) |
6d691129 | 3840 | rib_queue_add (&zebrad, rn); |
718e3744 | 3841 | } |
3842 | ||
6b0655a2 | 3843 | |
718e3744 | 3844 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3845 | static void |
718e3744 | 3846 | rib_weed_table (struct route_table *table) |
3847 | { | |
3848 | struct route_node *rn; | |
3849 | struct rib *rib; | |
3850 | struct rib *next; | |
3851 | ||
3852 | if (table) | |
3853 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3854 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3855 | { |
6d691129 PJ |
3856 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3857 | continue; | |
3858 | ||
b21b19c5 | 3859 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3860 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3861 | rib_delnode (rn, rib); |
718e3744 | 3862 | } |
3863 | } | |
3864 | ||
3865 | /* Delete all routes from non main table. */ | |
3866 | void | |
a1ac18c4 | 3867 | rib_weed_tables (void) |
718e3744 | 3868 | { |
3869 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3870 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3871 | } | |
6b0655a2 | 3872 | |
718e3744 | 3873 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3874 | static void |
718e3744 | 3875 | rib_sweep_table (struct route_table *table) |
3876 | { | |
3877 | struct route_node *rn; | |
3878 | struct rib *rib; | |
3879 | struct rib *next; | |
3880 | int ret = 0; | |
3881 | ||
3882 | if (table) | |
3883 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3884 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3885 | { |
6d691129 PJ |
3886 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3887 | continue; | |
3888 | ||
718e3744 | 3889 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3890 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3891 | { | |
3892 | ret = rib_uninstall_kernel (rn, rib); | |
3893 | if (! ret) | |
4d38fdb4 | 3894 | rib_delnode (rn, rib); |
718e3744 | 3895 | } |
3896 | } | |
3897 | } | |
3898 | ||
3899 | /* Sweep all RIB tables. */ | |
3900 | void | |
a1ac18c4 | 3901 | rib_sweep_route (void) |
718e3744 | 3902 | { |
3903 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3904 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3905 | } | |
2ea1ab1c VT |
3906 | |
3907 | /* Remove specific by protocol routes from 'table'. */ | |
3908 | static unsigned long | |
7c8ff89e | 3909 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3910 | { |
3911 | struct route_node *rn; | |
3912 | struct rib *rib; | |
3913 | struct rib *next; | |
3914 | unsigned long n = 0; | |
3915 | ||
3916 | if (table) | |
3917 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3918 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3919 | { |
2ea1ab1c VT |
3920 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3921 | continue; | |
7c8ff89e | 3922 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3923 | { |
3924 | rib_delnode (rn, rib); | |
3925 | n++; | |
3926 | } | |
3927 | } | |
3928 | ||
3929 | return n; | |
3930 | } | |
3931 | ||
3932 | /* Remove specific by protocol routes. */ | |
3933 | unsigned long | |
7c8ff89e | 3934 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3935 | { |
7c8ff89e DS |
3936 | return rib_score_proto_table (proto, instance, vrf_table (AFI_IP, SAFI_UNICAST, 0)) |
3937 | +rib_score_proto_table (proto, instance, vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2ea1ab1c VT |
3938 | } |
3939 | ||
718e3744 | 3940 | /* Close RIB and clean up kernel routes. */ |
a1ac18c4 | 3941 | static void |
718e3744 | 3942 | rib_close_table (struct route_table *table) |
3943 | { | |
3944 | struct route_node *rn; | |
3945 | struct rib *rib; | |
3946 | ||
3947 | if (table) | |
3948 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3949 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3950 | { |
9fd92e3c AS |
3951 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3952 | continue; | |
3953 | ||
5adc2528 AS |
3954 | zfpm_trigger_update (rn, NULL); |
3955 | ||
9fd92e3c AS |
3956 | if (! RIB_SYSTEM_ROUTE (rib)) |
3957 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3958 | } |
718e3744 | 3959 | } |
3960 | ||
3961 | /* Close all RIB tables. */ | |
3962 | void | |
a1ac18c4 | 3963 | rib_close (void) |
718e3744 | 3964 | { |
3965 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3966 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3967 | } | |
6b0655a2 | 3968 | |
718e3744 | 3969 | /* Routing information base initialize. */ |
3970 | void | |
a1ac18c4 | 3971 | rib_init (void) |
718e3744 | 3972 | { |
4d38fdb4 | 3973 | rib_queue_init (&zebrad); |
718e3744 | 3974 | /* VRF initialization. */ |
3975 | vrf_init (); | |
3976 | } | |
0915bb0c AS |
3977 | |
3978 | /* | |
3979 | * vrf_id_get_next | |
3980 | * | |
3981 | * Get the first vrf id that is greater than the given vrf id if any. | |
3982 | * | |
3983 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3984 | */ | |
3985 | static inline int | |
3986 | vrf_id_get_next (uint32_t id, uint32_t *next_id_p) | |
3987 | { | |
3988 | while (++id < vector_active (vrf_vector)) | |
3989 | { | |
3990 | if (vrf_lookup (id)) | |
3991 | { | |
3992 | *next_id_p = id; | |
3993 | return 1; | |
3994 | } | |
3995 | } | |
3996 | ||
3997 | return 0; | |
3998 | } | |
3999 | ||
4000 | /* | |
4001 | * rib_tables_iter_next | |
4002 | * | |
4003 | * Returns the next table in the iteration. | |
4004 | */ | |
4005 | struct route_table * | |
4006 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
4007 | { | |
4008 | struct route_table *table; | |
4009 | ||
4010 | /* | |
4011 | * Array that helps us go over all AFI/SAFI combinations via one | |
4012 | * index. | |
4013 | */ | |
4014 | static struct { | |
4015 | afi_t afi; | |
4016 | safi_t safi; | |
4017 | } afi_safis[] = { | |
4018 | { AFI_IP, SAFI_UNICAST }, | |
4019 | { AFI_IP, SAFI_MULTICAST }, | |
4020 | { AFI_IP6, SAFI_UNICAST }, | |
4021 | { AFI_IP6, SAFI_MULTICAST }, | |
4022 | }; | |
4023 | ||
4024 | table = NULL; | |
4025 | ||
4026 | switch (iter->state) | |
4027 | { | |
4028 | ||
4029 | case RIB_TABLES_ITER_S_INIT: | |
4030 | iter->vrf_id = 0; | |
4031 | iter->afi_safi_ix = -1; | |
4032 | ||
4033 | /* Fall through */ | |
4034 | ||
4035 | case RIB_TABLES_ITER_S_ITERATING: | |
4036 | iter->afi_safi_ix++; | |
4037 | while (1) | |
4038 | { | |
4039 | ||
4040 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
4041 | { | |
4042 | table = vrf_table (afi_safis[iter->afi_safi_ix].afi, | |
4043 | afi_safis[iter->afi_safi_ix].safi, | |
4044 | iter->vrf_id); | |
4045 | if (table) | |
4046 | break; | |
4047 | ||
4048 | iter->afi_safi_ix++; | |
4049 | } | |
4050 | ||
4051 | /* | |
4052 | * Found another table in this vrf. | |
4053 | */ | |
4054 | if (table) | |
4055 | break; | |
4056 | ||
4057 | /* | |
4058 | * Done with all tables in the current vrf, go to the next | |
4059 | * one. | |
4060 | */ | |
4061 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
4062 | break; | |
4063 | ||
4064 | iter->afi_safi_ix = 0; | |
4065 | } | |
4066 | ||
4067 | break; | |
4068 | ||
4069 | case RIB_TABLES_ITER_S_DONE: | |
4070 | return NULL; | |
4071 | } | |
4072 | ||
4073 | if (table) | |
4074 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4075 | else | |
4076 | iter->state = RIB_TABLES_ITER_S_DONE; | |
4077 | ||
4078 | return table; | |
4079 | } |