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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" |
88177fe3 | 46 | #include "zebra/interface.h" |
718e3744 | 47 | |
48 | /* Default rtm_table for all clients */ | |
b21b19c5 | 49 | extern struct zebra_t zebrad; |
718e3744 | 50 | |
457eb9af PJ |
51 | /* Hold time for RIB process, should be very minimal. |
52 | * it is useful to able to set it otherwise for testing, hence exported | |
53 | * as global here for test-rig code. | |
54 | */ | |
55 | int rib_process_hold_time = 10; | |
56 | ||
718e3744 | 57 | /* Each route type's string and default distance value. */ |
d145bc00 | 58 | static const struct |
718e3744 | 59 | { |
60 | int key; | |
61 | int distance; | |
5734509c | 62 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 63 | { |
5734509c PJ |
64 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
65 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
66 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
67 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
68 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
69 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
70 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
71 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
72 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
73 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
74 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 95}, | |
7052f228 | 75 | /* no entry/default: 150 */ |
718e3744 | 76 | }; |
6b0655a2 | 77 | |
718e3744 | 78 | /* Vector for routing table. */ |
d145bc00 | 79 | static vector vrf_vector; |
718e3744 | 80 | |
1b5ed1b0 AS |
81 | /* |
82 | * vrf_table_create | |
83 | */ | |
84 | static void | |
85 | vrf_table_create (struct vrf *vrf, afi_t afi, safi_t safi) | |
86 | { | |
87 | rib_table_info_t *info; | |
88 | struct route_table *table; | |
89 | ||
90 | assert (!vrf->table[afi][safi]); | |
91 | ||
92 | table = route_table_init (); | |
93 | vrf->table[afi][safi] = table; | |
94 | ||
95 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
96 | info->vrf = vrf; | |
97 | info->afi = afi; | |
98 | info->safi = safi; | |
99 | table->info = info; | |
100 | } | |
101 | ||
718e3744 | 102 | /* Allocate new VRF. */ |
a1ac18c4 | 103 | static struct vrf * |
fce954f8 | 104 | vrf_alloc (const char *name) |
718e3744 | 105 | { |
106 | struct vrf *vrf; | |
107 | ||
108 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); | |
109 | ||
110 | /* Put name. */ | |
111 | if (name) | |
112 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); | |
113 | ||
114 | /* Allocate routing table and static table. */ | |
1b5ed1b0 AS |
115 | vrf_table_create (vrf, AFI_IP, SAFI_UNICAST); |
116 | vrf_table_create (vrf, AFI_IP6, SAFI_UNICAST); | |
718e3744 | 117 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); |
118 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
1b5ed1b0 AS |
119 | vrf_table_create (vrf, AFI_IP, SAFI_MULTICAST); |
120 | vrf_table_create (vrf, AFI_IP6, SAFI_MULTICAST); | |
cddf391b B |
121 | vrf->stable[AFI_IP][SAFI_MULTICAST] = route_table_init (); |
122 | vrf->stable[AFI_IP6][SAFI_MULTICAST] = route_table_init (); | |
123 | ||
fb018d25 DS |
124 | vrf->rnh_table[AFI_IP] = route_table_init(); |
125 | vrf->rnh_table[AFI_IP6] = route_table_init(); | |
718e3744 | 126 | |
078430f6 DS |
127 | vrf->import_check_table[AFI_IP] = route_table_init(); |
128 | vrf->import_check_table[AFI_IP6] = route_table_init(); | |
129 | ||
718e3744 | 130 | return vrf; |
131 | } | |
132 | ||
718e3744 | 133 | /* Lookup VRF by identifier. */ |
134 | struct vrf * | |
135 | vrf_lookup (u_int32_t id) | |
136 | { | |
137 | return vector_lookup (vrf_vector, id); | |
138 | } | |
139 | ||
718e3744 | 140 | /* Initialize VRF. */ |
a1ac18c4 | 141 | static void |
142 | vrf_init (void) | |
718e3744 | 143 | { |
144 | struct vrf *default_table; | |
145 | ||
146 | /* Allocate VRF vector. */ | |
147 | vrf_vector = vector_init (1); | |
148 | ||
149 | /* Allocate default main table. */ | |
150 | default_table = vrf_alloc ("Default-IP-Routing-Table"); | |
151 | ||
152 | /* Default table index must be 0. */ | |
153 | vector_set_index (vrf_vector, 0, default_table); | |
154 | } | |
155 | ||
156 | /* Lookup route table. */ | |
157 | struct route_table * | |
158 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) | |
159 | { | |
160 | struct vrf *vrf; | |
161 | ||
162 | vrf = vrf_lookup (id); | |
163 | if (! vrf) | |
164 | return NULL; | |
165 | ||
9499bf2b LR |
166 | if( afi >= AFI_MAX || safi >= SAFI_MAX ) |
167 | return NULL; | |
168 | ||
718e3744 | 169 | return vrf->table[afi][safi]; |
170 | } | |
171 | ||
172 | /* Lookup static route table. */ | |
173 | struct route_table * | |
174 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) | |
175 | { | |
176 | struct vrf *vrf; | |
177 | ||
178 | vrf = vrf_lookup (id); | |
179 | if (! vrf) | |
180 | return NULL; | |
181 | ||
9499bf2b LR |
182 | if( afi >= AFI_MAX || safi >= SAFI_MAX ) |
183 | return NULL; | |
184 | ||
718e3744 | 185 | return vrf->stable[afi][safi]; |
186 | } | |
6b0655a2 | 187 | |
7a4bb9c5 DS |
188 | struct route_table * |
189 | vrf_other_route_table (afi_t afi, u_int32_t table_id, u_int32_t vrf_id) | |
190 | { | |
191 | struct vrf *vrf; | |
192 | ||
193 | vrf = vrf_lookup (vrf_id); | |
194 | if (! vrf) | |
195 | return NULL; | |
196 | ||
197 | if(afi >= AFI_MAX) | |
198 | return NULL; | |
199 | ||
200 | if (table_id >= ZEBRA_KERNEL_TABLE_MAX) | |
201 | return NULL; | |
202 | ||
203 | if (vrf->other_table[afi][table_id] == NULL) | |
204 | { | |
205 | vrf->other_table[afi][table_id] = route_table_init(); | |
206 | } | |
207 | ||
208 | return (vrf->other_table[afi][table_id]); | |
209 | } | |
210 | ||
211 | int | |
212 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
213 | { | |
214 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX) || | |
215 | (table_id == RT_TABLE_UNSPEC) || | |
216 | (table_id == RT_TABLE_LOCAL) || | |
217 | (table_id == RT_TABLE_COMPAT)) | |
218 | return 0; | |
219 | else | |
220 | return 1; | |
221 | } | |
222 | ||
223 | int | |
224 | is_zebra_main_routing_table(u_int32_t table_id) | |
225 | { | |
226 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
227 | return 1; | |
228 | return 0; | |
229 | } | |
230 | ||
fa713d9e | 231 | /* Add nexthop to the end of a nexthop list. */ |
4e3afb14 | 232 | static void |
fa713d9e | 233 | _nexthop_add (struct nexthop **target, struct nexthop *nexthop) |
718e3744 | 234 | { |
235 | struct nexthop *last; | |
236 | ||
fa713d9e | 237 | for (last = *target; last && last->next; last = last->next) |
718e3744 | 238 | ; |
239 | if (last) | |
240 | last->next = nexthop; | |
241 | else | |
fa713d9e | 242 | *target = nexthop; |
718e3744 | 243 | nexthop->prev = last; |
fa713d9e | 244 | } |
718e3744 | 245 | |
fa713d9e | 246 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 247 | void |
fa713d9e CF |
248 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
249 | { | |
250 | _nexthop_add(&rib->nexthop, nexthop); | |
718e3744 | 251 | rib->nexthop_num++; |
252 | } | |
253 | ||
6e26278c DS |
254 | static void |
255 | _copy_nexthops (struct nexthop **tnh, struct nexthop *nh) | |
256 | { | |
257 | struct nexthop *nexthop; | |
258 | struct nexthop *nh1; | |
259 | ||
260 | for (nh1 = nh; nh1; nh1 = nh1->next) | |
261 | { | |
262 | nexthop = nexthop_new(); | |
263 | nexthop->flags = nh->flags; | |
264 | nexthop->type = nh->type; | |
265 | nexthop->ifindex = nh->ifindex; | |
266 | if (nh->ifname) | |
267 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
268 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
269 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
270 | _nexthop_add(tnh, nexthop); | |
271 | ||
272 | if (CHECK_FLAG(nh1->flags, NEXTHOP_FLAG_RECURSIVE)) | |
273 | _copy_nexthops(&nexthop->resolved, nh1->resolved); | |
274 | } | |
275 | } | |
276 | ||
277 | /** | |
278 | * copy_nexthop - copy a nexthop to the rib structure. | |
279 | */ | |
280 | void | |
281 | copy_nexthops (struct rib *rib, struct nexthop *nh) | |
282 | { | |
283 | struct nexthop *nexthop; | |
284 | ||
285 | nexthop = nexthop_new(); | |
286 | nexthop->flags = nh->flags; | |
287 | nexthop->type = nh->type; | |
288 | nexthop->ifindex = nh->ifindex; | |
289 | if (nh->ifname) | |
290 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
291 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
292 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
293 | nexthop_add(rib, nexthop); | |
294 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) | |
295 | _copy_nexthops(&nexthop->resolved, nh->resolved); | |
296 | } | |
297 | ||
718e3744 | 298 | /* Delete specified nexthop from the list. */ |
a1ac18c4 | 299 | static void |
718e3744 | 300 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
301 | { | |
302 | if (nexthop->next) | |
303 | nexthop->next->prev = nexthop->prev; | |
304 | if (nexthop->prev) | |
305 | nexthop->prev->next = nexthop->next; | |
306 | else | |
307 | rib->nexthop = nexthop->next; | |
308 | rib->nexthop_num--; | |
309 | } | |
310 | ||
311 | /* Free nexthop. */ | |
fb018d25 | 312 | void |
6e26278c | 313 | nexthop_free (struct nexthop *nexthop, struct route_node *rn) |
718e3744 | 314 | { |
a4b70768 | 315 | if (nexthop->ifname) |
316 | XFREE (0, nexthop->ifname); | |
fa713d9e | 317 | if (nexthop->resolved) |
6e26278c | 318 | nexthops_free(nexthop->resolved, rn); |
718e3744 | 319 | XFREE (MTYPE_NEXTHOP, nexthop); |
320 | } | |
321 | ||
fa713d9e | 322 | /* Frees a list of nexthops */ |
fb018d25 | 323 | void |
6e26278c | 324 | nexthops_free (struct nexthop *nexthop, struct route_node *rn) |
fa713d9e CF |
325 | { |
326 | struct nexthop *nh, *next; | |
6e26278c | 327 | struct prefix nh_p; |
fa713d9e CF |
328 | |
329 | for (nh = nexthop; nh; nh = next) | |
330 | { | |
331 | next = nh->next; | |
6e26278c DS |
332 | if (nh->type == NEXTHOP_TYPE_IPV4) |
333 | { | |
334 | nh_p.family = AF_INET; | |
335 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
336 | nh_p.u.prefix4 = nh->gate.ipv4; | |
70c0f184 | 337 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c DS |
338 | } |
339 | else if (nh->type == NEXTHOP_TYPE_IPV6) | |
340 | { | |
341 | nh_p.family = AF_INET6; | |
342 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
343 | nh_p.u.prefix6 = nh->gate.ipv6; | |
70c0f184 | 344 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c | 345 | } |
6e26278c | 346 | nexthop_free (nh, rn); |
fa713d9e CF |
347 | } |
348 | } | |
349 | ||
718e3744 | 350 | struct nexthop * |
351 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
352 | { | |
353 | struct nexthop *nexthop; | |
354 | ||
393deb9b | 355 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 356 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
357 | nexthop->ifindex = ifindex; | |
358 | ||
359 | nexthop_add (rib, nexthop); | |
360 | ||
361 | return nexthop; | |
362 | } | |
363 | ||
364 | struct nexthop * | |
365 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
366 | { | |
367 | struct nexthop *nexthop; | |
368 | ||
393deb9b | 369 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 370 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
a4b70768 | 371 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 372 | |
373 | nexthop_add (rib, nexthop); | |
374 | ||
375 | return nexthop; | |
376 | } | |
377 | ||
378 | struct nexthop * | |
7514fb77 | 379 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 380 | { |
381 | struct nexthop *nexthop; | |
382 | ||
393deb9b | 383 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 384 | nexthop->type = NEXTHOP_TYPE_IPV4; |
385 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
386 | if (src) |
387 | nexthop->src.ipv4 = *src; | |
718e3744 | 388 | |
389 | nexthop_add (rib, nexthop); | |
390 | ||
391 | return nexthop; | |
392 | } | |
393 | ||
26e2ae36 | 394 | struct nexthop * |
718e3744 | 395 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
7514fb77 | 396 | struct in_addr *src, unsigned int ifindex) |
718e3744 | 397 | { |
398 | struct nexthop *nexthop; | |
399 | ||
393deb9b | 400 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 401 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
402 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
403 | if (src) |
404 | nexthop->src.ipv4 = *src; | |
718e3744 | 405 | nexthop->ifindex = ifindex; |
406 | ||
407 | nexthop_add (rib, nexthop); | |
408 | ||
409 | return nexthop; | |
410 | } | |
411 | ||
c8a1cb5c DS |
412 | struct nexthop * |
413 | nexthop_ipv4_ifindex_ol_add (struct rib *rib, const struct in_addr *ipv4, | |
414 | const struct in_addr *src, const unsigned int ifindex) | |
415 | { | |
416 | struct nexthop *nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
417 | ||
418 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
419 | IPV4_ADDR_COPY (&nexthop->gate.ipv4, ipv4); | |
420 | if (src) | |
421 | IPV4_ADDR_COPY (&nexthop->src.ipv4, src); | |
422 | nexthop->ifindex = ifindex; | |
423 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
424 | nexthop_add (rib, nexthop); | |
425 | return nexthop; | |
426 | } | |
427 | ||
718e3744 | 428 | #ifdef HAVE_IPV6 |
429 | struct nexthop * | |
430 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
431 | { | |
432 | struct nexthop *nexthop; | |
433 | ||
393deb9b | 434 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 435 | nexthop->type = NEXTHOP_TYPE_IPV6; |
436 | nexthop->gate.ipv6 = *ipv6; | |
437 | ||
438 | nexthop_add (rib, nexthop); | |
439 | ||
440 | return nexthop; | |
441 | } | |
442 | ||
41fc2714 | 443 | struct nexthop * |
718e3744 | 444 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
445 | char *ifname) | |
446 | { | |
447 | struct nexthop *nexthop; | |
448 | ||
393deb9b | 449 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 450 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
451 | nexthop->gate.ipv6 = *ipv6; | |
452 | nexthop->ifname = XSTRDUP (0, ifname); | |
453 | ||
454 | nexthop_add (rib, nexthop); | |
455 | ||
456 | return nexthop; | |
457 | } | |
458 | ||
41fc2714 | 459 | struct nexthop * |
718e3744 | 460 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
461 | unsigned int ifindex) | |
462 | { | |
463 | struct nexthop *nexthop; | |
464 | ||
393deb9b | 465 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 466 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
467 | nexthop->gate.ipv6 = *ipv6; | |
468 | nexthop->ifindex = ifindex; | |
469 | ||
470 | nexthop_add (rib, nexthop); | |
471 | ||
472 | return nexthop; | |
473 | } | |
474 | #endif /* HAVE_IPV6 */ | |
475 | ||
595db7f1 | 476 | struct nexthop * |
477 | nexthop_blackhole_add (struct rib *rib) | |
478 | { | |
479 | struct nexthop *nexthop; | |
480 | ||
393deb9b | 481 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
595db7f1 | 482 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
483 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
484 | ||
485 | nexthop_add (rib, nexthop); | |
486 | ||
487 | return nexthop; | |
488 | } | |
489 | ||
fa713d9e CF |
490 | /* This method checks whether a recursive nexthop has at |
491 | * least one resolved nexthop in the fib. | |
492 | */ | |
493 | int | |
494 | nexthop_has_fib_child(struct nexthop *nexthop) | |
495 | { | |
496 | struct nexthop *nh; | |
497 | ||
498 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
499 | return 0; | |
500 | ||
501 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
502 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
503 | return 1; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
718e3744 | 508 | /* If force flag is not set, do not modify falgs at all for uninstall |
509 | the route from FIB. */ | |
a1ac18c4 | 510 | static int |
718e3744 | 511 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
512 | struct route_node *top) | |
513 | { | |
514 | struct prefix_ipv4 p; | |
515 | struct route_table *table; | |
516 | struct route_node *rn; | |
517 | struct rib *match; | |
fa713d9e | 518 | int resolved; |
6e26278c | 519 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 520 | struct nexthop *resolved_hop; |
6e26278c | 521 | int recursing = 0; |
c8a1cb5c | 522 | struct interface *ifp; |
718e3744 | 523 | |
524 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
525 | nexthop->ifindex = 0; | |
526 | ||
527 | if (set) | |
fa713d9e CF |
528 | { |
529 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 530 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
531 | nexthop->resolved = NULL; |
532 | } | |
718e3744 | 533 | |
6e26278c DS |
534 | /* Skip nexthops that have been filtered out due to route-map */ |
535 | /* The nexthops are specific to this route and so the same */ | |
536 | /* nexthop for a different route may not have this flag set */ | |
537 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
538 | return 0; | |
539 | ||
c8a1cb5c DS |
540 | /* onlink flag is an indication that we need to only check that |
541 | * the link is up, we won't find the GW address in the routing | |
542 | * table. | |
543 | */ | |
544 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
545 | { | |
546 | ifp = if_lookup_by_index (nexthop->ifindex); | |
547 | if (ifp && if_is_operative(ifp)) | |
548 | return 1; | |
549 | else | |
550 | return 0; | |
551 | } | |
552 | ||
718e3744 | 553 | /* Make lookup prefix. */ |
554 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
555 | p.family = AF_INET; | |
556 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
557 | p.prefix = nexthop->gate.ipv4; | |
558 | ||
559 | /* Lookup table. */ | |
560 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
561 | if (! table) | |
562 | return 0; | |
563 | ||
564 | rn = route_node_match (table, (struct prefix *) &p); | |
565 | while (rn) | |
566 | { | |
567 | route_unlock_node (rn); | |
568 | ||
a50c107e | 569 | /* If lookup self prefix return immediately. */ |
718e3744 | 570 | if (rn == top) |
571 | return 0; | |
572 | ||
573 | /* Pick up selected route. */ | |
18ff3edd DS |
574 | /* However, do not resolve over default route unless explicitly allowed. */ |
575 | if (is_default_prefix (&rn->p) && | |
576 | !nh_resolve_via_default (p.family)) | |
577 | return 0; | |
578 | ||
9fd92e3c | 579 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
580 | { |
581 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
582 | continue; | |
583 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
584 | break; | |
585 | } | |
718e3744 | 586 | |
587 | /* If there is no selected route or matched route is EGP, go up | |
588 | tree. */ | |
6e26278c | 589 | if (! match) |
718e3744 | 590 | { |
591 | do { | |
592 | rn = rn->parent; | |
593 | } while (rn && rn->info == NULL); | |
594 | if (rn) | |
595 | route_lock_node (rn); | |
596 | } | |
597 | else | |
598 | { | |
48a53dc7 CF |
599 | /* If the longest prefix match for the nexthop yields |
600 | * a blackhole, mark it as inactive. */ | |
601 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
602 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
603 | return 0; | |
604 | ||
718e3744 | 605 | if (match->type == ZEBRA_ROUTE_CONNECT) |
606 | { | |
607 | /* Directly point connected route. */ | |
608 | newhop = match->nexthop; | |
609 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
610 | nexthop->ifindex = newhop->ifindex; | |
611 | ||
612 | return 1; | |
613 | } | |
614 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
615 | { | |
fa713d9e | 616 | resolved = 0; |
718e3744 | 617 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
618 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
619 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
620 | { | |
621 | if (set) | |
622 | { | |
623 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 624 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
625 | |
626 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
627 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
628 | /* If the resolving route specifies a gateway, use it */ |
629 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
630 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
631 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
632 | { | |
633 | resolved_hop->type = newhop->type; | |
634 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
635 | ||
636 | if (newhop->ifindex) | |
637 | { | |
638 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
639 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
640 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
641 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
642 | } |
643 | } | |
644 | ||
645 | /* If the resolving route is an interface route, | |
646 | * it means the gateway we are looking up is connected | |
647 | * to that interface. (The actual network is _not_ onlink). | |
648 | * Therefore, the resolved route should have the original | |
649 | * gateway as nexthop as it is directly connected. | |
650 | * | |
651 | * On Linux, we have to set the onlink netlink flag because | |
652 | * otherwise, the kernel won't accept the route. */ | |
718e3744 | 653 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
654 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
655 | { | |
656 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
657 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
658 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
659 | resolved_hop->ifindex = newhop->ifindex; | |
660 | } | |
fa713d9e | 661 | |
6e26278c DS |
662 | _nexthop_add(&nexthop->resolved, resolved_hop); |
663 | } | |
664 | resolved = 1; | |
665 | } | |
666 | return resolved; | |
667 | } | |
668 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
669 | { | |
670 | resolved = 0; | |
671 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
672 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
673 | { | |
674 | if (set) | |
675 | { | |
676 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
677 | ||
678 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
679 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
680 | /* If the resolving route specifies a gateway, use it */ | |
681 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
682 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
683 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
684 | { | |
685 | resolved_hop->type = newhop->type; | |
686 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
687 | ||
688 | if (newhop->ifindex) | |
689 | { | |
690 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
691 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
692 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
693 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
694 | } |
695 | } | |
696 | ||
697 | /* If the resolving route is an interface route, | |
698 | * it means the gateway we are looking up is connected | |
699 | * to that interface. (The actual network is _not_ onlink). | |
700 | * Therefore, the resolved route should have the original | |
701 | * gateway as nexthop as it is directly connected. | |
702 | * | |
703 | * On Linux, we have to set the onlink netlink flag because | |
704 | * otherwise, the kernel won't accept the route. | |
705 | */ | |
706 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
707 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
708 | { | |
709 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
710 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
711 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
712 | resolved_hop->ifindex = newhop->ifindex; | |
713 | } | |
714 | ||
fa713d9e | 715 | _nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 716 | } |
fa713d9e | 717 | resolved = 1; |
718e3744 | 718 | } |
fa713d9e | 719 | return resolved; |
718e3744 | 720 | } |
721 | else | |
722 | { | |
723 | return 0; | |
724 | } | |
725 | } | |
726 | } | |
727 | return 0; | |
728 | } | |
729 | ||
730 | #ifdef HAVE_IPV6 | |
731 | /* If force flag is not set, do not modify falgs at all for uninstall | |
732 | the route from FIB. */ | |
a1ac18c4 | 733 | static int |
718e3744 | 734 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
735 | struct route_node *top) | |
736 | { | |
737 | struct prefix_ipv6 p; | |
738 | struct route_table *table; | |
739 | struct route_node *rn; | |
740 | struct rib *match; | |
fa713d9e | 741 | int resolved; |
6e26278c DS |
742 | struct nexthop *newhop, *tnewhop; |
743 | int recursing = 0; | |
fa713d9e | 744 | struct nexthop *resolved_hop; |
718e3744 | 745 | |
746 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
747 | nexthop->ifindex = 0; | |
748 | ||
749 | if (set) | |
fa713d9e CF |
750 | { |
751 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 752 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
753 | nexthop->resolved = NULL; |
754 | } | |
718e3744 | 755 | |
6e26278c DS |
756 | /* Skip nexthops that have been filtered out due to route-map */ |
757 | /* The nexthops are specific to this route and so the same */ | |
758 | /* nexthop for a different route may not have this flag set */ | |
759 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
760 | return 0; | |
761 | ||
718e3744 | 762 | /* Make lookup prefix. */ |
763 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
764 | p.family = AF_INET6; | |
765 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
766 | p.prefix = nexthop->gate.ipv6; | |
767 | ||
768 | /* Lookup table. */ | |
769 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
770 | if (! table) | |
771 | return 0; | |
772 | ||
773 | rn = route_node_match (table, (struct prefix *) &p); | |
774 | while (rn) | |
775 | { | |
776 | route_unlock_node (rn); | |
777 | ||
a50c107e | 778 | /* If lookup self prefix return immediately. */ |
718e3744 | 779 | if (rn == top) |
780 | return 0; | |
781 | ||
782 | /* Pick up selected route. */ | |
18ff3edd DS |
783 | /* However, do not resolve over default route unless explicitly allowed. */ |
784 | if (is_default_prefix (&rn->p) && | |
785 | !nh_resolve_via_default (p.family)) | |
786 | return 0; | |
787 | ||
9fd92e3c | 788 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
789 | { |
790 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
791 | continue; | |
792 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
793 | break; | |
794 | } | |
718e3744 | 795 | |
796 | /* If there is no selected route or matched route is EGP, go up | |
797 | tree. */ | |
6e26278c | 798 | if (! match) |
718e3744 | 799 | { |
800 | do { | |
801 | rn = rn->parent; | |
802 | } while (rn && rn->info == NULL); | |
803 | if (rn) | |
804 | route_lock_node (rn); | |
805 | } | |
806 | else | |
807 | { | |
48a53dc7 CF |
808 | /* If the longest prefix match for the nexthop yields |
809 | * a blackhole, mark it as inactive. */ | |
810 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
811 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
812 | return 0; | |
813 | ||
718e3744 | 814 | if (match->type == ZEBRA_ROUTE_CONNECT) |
815 | { | |
816 | /* Directly point connected route. */ | |
817 | newhop = match->nexthop; | |
818 | ||
819 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
820 | nexthop->ifindex = newhop->ifindex; | |
821 | ||
822 | return 1; | |
823 | } | |
824 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
825 | { | |
fa713d9e | 826 | resolved = 0; |
718e3744 | 827 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
828 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
829 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
830 | { |
831 | if (set) | |
832 | { | |
833 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
834 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
835 | ||
836 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
837 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
838 | /* See nexthop_active_ipv4 for a description how the | |
839 | * resolved nexthop is constructed. */ | |
840 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
841 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
842 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
843 | { | |
844 | resolved_hop->type = newhop->type; | |
845 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
846 | ||
847 | if (newhop->ifindex) | |
848 | { | |
849 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
850 | resolved_hop->ifindex = newhop->ifindex; | |
851 | } | |
852 | } | |
853 | ||
854 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
855 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
856 | { | |
857 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
858 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
859 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
860 | resolved_hop->ifindex = newhop->ifindex; | |
861 | } | |
862 | ||
863 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
864 | } | |
865 | resolved = 1; | |
866 | } | |
867 | return resolved; | |
868 | } | |
869 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
870 | { | |
871 | resolved = 0; | |
872 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
873 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 874 | { |
875 | if (set) | |
876 | { | |
877 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
878 | |
879 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
880 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
881 | /* See nexthop_active_ipv4 for a description how the |
882 | * resolved nexthop is constructed. */ | |
718e3744 | 883 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
884 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
885 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
c3e6b595 CF |
886 | { |
887 | resolved_hop->type = newhop->type; | |
888 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
889 | ||
890 | if (newhop->ifindex) | |
891 | { | |
892 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
893 | resolved_hop->ifindex = newhop->ifindex; | |
894 | } | |
895 | } | |
fa713d9e | 896 | |
718e3744 | 897 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
898 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
899 | { | |
900 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
901 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
902 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
903 | resolved_hop->ifindex = newhop->ifindex; | |
904 | } | |
fa713d9e CF |
905 | |
906 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
718e3744 | 907 | } |
fa713d9e | 908 | resolved = 1; |
718e3744 | 909 | } |
fa713d9e | 910 | return resolved; |
718e3744 | 911 | } |
912 | else | |
913 | { | |
914 | return 0; | |
915 | } | |
916 | } | |
917 | } | |
918 | return 0; | |
919 | } | |
920 | #endif /* HAVE_IPV6 */ | |
921 | ||
922 | struct rib * | |
923 | rib_match_ipv4 (struct in_addr addr) | |
924 | { | |
925 | struct prefix_ipv4 p; | |
926 | struct route_table *table; | |
927 | struct route_node *rn; | |
928 | struct rib *match; | |
fa713d9e CF |
929 | struct nexthop *newhop, *tnewhop; |
930 | int recursing; | |
718e3744 | 931 | |
932 | /* Lookup table. */ | |
933 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
934 | if (! table) | |
935 | return 0; | |
936 | ||
937 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
938 | p.family = AF_INET; | |
939 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
940 | p.prefix = addr; | |
941 | ||
942 | rn = route_node_match (table, (struct prefix *) &p); | |
943 | ||
944 | while (rn) | |
945 | { | |
946 | route_unlock_node (rn); | |
947 | ||
948 | /* Pick up selected route. */ | |
9fd92e3c | 949 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
950 | { |
951 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
952 | continue; | |
953 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
954 | break; | |
955 | } | |
718e3744 | 956 | |
957 | /* If there is no selected route or matched route is EGP, go up | |
958 | tree. */ | |
6e26278c | 959 | if (! match) |
718e3744 | 960 | { |
961 | do { | |
962 | rn = rn->parent; | |
963 | } while (rn && rn->info == NULL); | |
964 | if (rn) | |
965 | route_lock_node (rn); | |
966 | } | |
967 | else | |
968 | { | |
969 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
970 | /* Directly point connected route. */ | |
971 | return match; | |
972 | else | |
973 | { | |
fa713d9e | 974 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 975 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
976 | return match; | |
977 | return NULL; | |
978 | } | |
979 | } | |
980 | } | |
981 | return NULL; | |
982 | } | |
983 | ||
984 | struct rib * | |
985 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
986 | { | |
987 | struct route_table *table; | |
988 | struct route_node *rn; | |
989 | struct rib *match; | |
fa713d9e CF |
990 | struct nexthop *nexthop, *tnexthop; |
991 | int recursing; | |
718e3744 | 992 | |
993 | /* Lookup table. */ | |
994 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
995 | if (! table) | |
996 | return 0; | |
997 | ||
998 | rn = route_node_lookup (table, (struct prefix *) p); | |
999 | ||
1000 | /* No route for this prefix. */ | |
1001 | if (! rn) | |
1002 | return NULL; | |
1003 | ||
1004 | /* Unlock node. */ | |
1005 | route_unlock_node (rn); | |
1006 | ||
9fd92e3c | 1007 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1008 | { |
1009 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1010 | continue; | |
1011 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1012 | break; | |
1013 | } | |
718e3744 | 1014 | |
6e26278c | 1015 | if (! match) |
718e3744 | 1016 | return NULL; |
1017 | ||
1018 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1019 | return match; | |
1020 | ||
fa713d9e | 1021 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1022 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1023 | return match; | |
1024 | ||
1025 | return NULL; | |
1026 | } | |
1027 | ||
dc95824a DO |
1028 | /* |
1029 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
1030 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
1031 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
1032 | * | |
1033 | * Return values: | |
1034 | * -1: error | |
1035 | * 0: exact match found | |
1036 | * 1: a match was found with a different gate | |
1037 | * 2: connected route found | |
1038 | * 3: no matches found | |
1039 | */ | |
1040 | int | |
1041 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate) | |
1042 | { | |
1043 | struct route_table *table; | |
1044 | struct route_node *rn; | |
1045 | struct rib *match; | |
fa713d9e CF |
1046 | struct nexthop *nexthop, *tnexthop; |
1047 | int recursing; | |
1048 | int nexthops_active; | |
dc95824a DO |
1049 | |
1050 | /* Lookup table. */ | |
1051 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1052 | if (! table) | |
1053 | return ZEBRA_RIB_LOOKUP_ERROR; | |
1054 | ||
1055 | /* Scan the RIB table for exactly matching RIB entry. */ | |
1056 | rn = route_node_lookup (table, (struct prefix *) p); | |
1057 | ||
1058 | /* No route for this prefix. */ | |
1059 | if (! rn) | |
1060 | return ZEBRA_RIB_NOTFOUND; | |
1061 | ||
1062 | /* Unlock node. */ | |
1063 | route_unlock_node (rn); | |
1064 | ||
1065 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 1066 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1067 | { |
1068 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1069 | continue; | |
1070 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1071 | break; | |
1072 | } | |
dc95824a DO |
1073 | |
1074 | /* None such found :( */ | |
1075 | if (!match) | |
1076 | return ZEBRA_RIB_NOTFOUND; | |
1077 | ||
1078 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1079 | return ZEBRA_RIB_FOUND_CONNECTED; | |
1080 | ||
1081 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
1082 | nexthops_active = 0; |
1083 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 1084 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 1085 | { |
fa713d9e CF |
1086 | nexthops_active = 1; |
1087 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
1088 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 1089 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
1090 | { |
1091 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
1092 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
1093 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
1094 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
1095 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1096 | } | |
dc95824a | 1097 | } |
fa713d9e CF |
1098 | |
1099 | if (nexthops_active) | |
1100 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1101 | |
1102 | return ZEBRA_RIB_NOTFOUND; | |
1103 | } | |
1104 | ||
718e3744 | 1105 | #ifdef HAVE_IPV6 |
1106 | struct rib * | |
1107 | rib_match_ipv6 (struct in6_addr *addr) | |
1108 | { | |
1109 | struct prefix_ipv6 p; | |
1110 | struct route_table *table; | |
1111 | struct route_node *rn; | |
1112 | struct rib *match; | |
fa713d9e CF |
1113 | struct nexthop *newhop, *tnewhop; |
1114 | int recursing; | |
718e3744 | 1115 | |
1116 | /* Lookup table. */ | |
1117 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1118 | if (! table) | |
1119 | return 0; | |
1120 | ||
1121 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
1122 | p.family = AF_INET6; | |
1123 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1124 | IPV6_ADDR_COPY (&p.prefix, addr); | |
1125 | ||
1126 | rn = route_node_match (table, (struct prefix *) &p); | |
1127 | ||
1128 | while (rn) | |
1129 | { | |
1130 | route_unlock_node (rn); | |
1131 | ||
1132 | /* Pick up selected route. */ | |
9fd92e3c | 1133 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1134 | { |
1135 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1136 | continue; | |
1137 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1138 | break; | |
1139 | } | |
718e3744 | 1140 | |
1141 | /* If there is no selected route or matched route is EGP, go up | |
1142 | tree. */ | |
6e26278c | 1143 | if (! match) |
718e3744 | 1144 | { |
1145 | do { | |
1146 | rn = rn->parent; | |
1147 | } while (rn && rn->info == NULL); | |
1148 | if (rn) | |
1149 | route_lock_node (rn); | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1154 | /* Directly point connected route. */ | |
1155 | return match; | |
1156 | else | |
1157 | { | |
fa713d9e | 1158 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 1159 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
1160 | return match; | |
1161 | return NULL; | |
1162 | } | |
1163 | } | |
1164 | } | |
1165 | return NULL; | |
1166 | } | |
1167 | #endif /* HAVE_IPV6 */ | |
1168 | ||
7514fb77 PJ |
1169 | #define RIB_SYSTEM_ROUTE(R) \ |
1170 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1171 | ||
dc95824a DO |
1172 | /* This function verifies reachability of one given nexthop, which can be |
1173 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1174 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1175 | * nexthop->ifindex will be updated appropriately as well. | |
1176 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1177 | * not vice versa. | |
1178 | * | |
1179 | * The return value is the final value of 'ACTIVE' flag. | |
1180 | */ | |
1181 | ||
d02c56cd | 1182 | static unsigned |
718e3744 | 1183 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1184 | struct nexthop *nexthop, int set) | |
1185 | { | |
f3a1732e | 1186 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1187 | struct interface *ifp; |
7514fb77 | 1188 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1189 | int family; |
518f0eb1 | 1190 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1191 | |
7a4bb9c5 DS |
1192 | if (rn->p.family == AF_INET) |
1193 | family = AFI_IP; | |
1194 | else if (rn->p.family == AF_INET6) | |
1195 | family = AFI_IP6; | |
1196 | else | |
1197 | family = 0; | |
718e3744 | 1198 | switch (nexthop->type) |
1199 | { | |
1200 | case NEXTHOP_TYPE_IFINDEX: | |
1201 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1202 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1203 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1204 | else | |
1205 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1206 | break; | |
718e3744 | 1207 | case NEXTHOP_TYPE_IPV6_IFNAME: |
7514fb77 PJ |
1208 | family = AFI_IP6; |
1209 | case NEXTHOP_TYPE_IFNAME: | |
718e3744 | 1210 | ifp = if_lookup_by_name (nexthop->ifname); |
3f087670 | 1211 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1212 | { |
1213 | if (set) | |
1214 | nexthop->ifindex = ifp->ifindex; | |
1215 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1216 | } | |
1217 | else | |
1218 | { | |
1219 | if (set) | |
1220 | nexthop->ifindex = 0; | |
1221 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1222 | } | |
1223 | break; | |
1224 | case NEXTHOP_TYPE_IPV4: | |
1225 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1226 | family = AFI_IP; |
718e3744 | 1227 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1228 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1229 | else | |
1230 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1231 | break; | |
1232 | #ifdef HAVE_IPV6 | |
1233 | case NEXTHOP_TYPE_IPV6: | |
7514fb77 | 1234 | family = AFI_IP6; |
718e3744 | 1235 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1236 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1237 | else | |
1238 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1239 | break; | |
1240 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
7514fb77 | 1241 | family = AFI_IP6; |
718e3744 | 1242 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1243 | { | |
1244 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1245 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1246 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1247 | else | |
1248 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1249 | } | |
1250 | else | |
1251 | { | |
1252 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1253 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1254 | else | |
1255 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1256 | } | |
1257 | break; | |
1258 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 1259 | case NEXTHOP_TYPE_BLACKHOLE: |
1260 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1261 | break; | |
718e3744 | 1262 | default: |
1263 | break; | |
1264 | } | |
7514fb77 PJ |
1265 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1266 | return 0; | |
1267 | ||
f3a1732e CF |
1268 | /* XXX: What exactly do those checks do? Do we support |
1269 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1270 | if (RIB_SYSTEM_ROUTE(rib) || |
1271 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1272 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1273 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1274 | ||
f3a1732e CF |
1275 | /* The original code didn't determine the family correctly |
1276 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1277 | * from the rib_table_info in those cases. | |
1278 | * Possibly it may be better to use only the rib_table_info | |
1279 | * in every case. | |
1280 | */ | |
1281 | if (!family) | |
1282 | family = info->afi; | |
1283 | ||
c52ef59f | 1284 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1285 | |
ca84c8ef DS |
1286 | /* It'll get set if required inside */ |
1287 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->tag); | |
7514fb77 | 1288 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1289 | { |
1290 | if (IS_ZEBRA_DEBUG_RIB) | |
1291 | { | |
1292 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1293 | zlog_debug("%s: Filtering out %s with NH out %s due to route map", | |
1294 | __FUNCTION__, buf, nexthop->ifname); | |
1295 | } | |
1296 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1297 | } | |
c52ef59f | 1298 | |
718e3744 | 1299 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1300 | } | |
1301 | ||
03e232a4 DO |
1302 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1303 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1304 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
1305 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
1306 | * transparently passed to nexthop_active_check(). | |
1307 | * | |
1308 | * Return value is the new number of active nexthops. | |
1309 | */ | |
1310 | ||
a1ac18c4 | 1311 | static int |
718e3744 | 1312 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1313 | { | |
1314 | struct nexthop *nexthop; | |
c52ef59f | 1315 | union g_addr prev_src; |
6e26278c DS |
1316 | unsigned int prev_active, prev_index, new_active, old_num_nh; |
1317 | ||
1318 | old_num_nh = rib->nexthop_active_num; | |
718e3744 | 1319 | |
1320 | rib->nexthop_active_num = 0; | |
1321 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1322 | ||
1323 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1324 | { |
c52ef59f DS |
1325 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1326 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1327 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1328 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1329 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1330 | rib->nexthop_active_num++; | |
c52ef59f | 1331 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1332 | if (prev_active != new_active || |
c52ef59f DS |
1333 | prev_index != nexthop->ifindex || |
1334 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1335 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
1336 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr)) | |
6e26278c DS |
1337 | { |
1338 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1339 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1340 | } | |
03e232a4 | 1341 | } |
6e26278c DS |
1342 | |
1343 | if (old_num_nh != rib->nexthop_active_num) | |
1344 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1345 | ||
1346 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_CHANGED)) | |
1347 | { | |
1348 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1349 | } | |
1350 | ||
718e3744 | 1351 | return rib->nexthop_active_num; |
1352 | } | |
6baeb988 | 1353 | |
6b0655a2 | 1354 | |
718e3744 | 1355 | |
6ae24471 DS |
1356 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1357 | * is only used for IPv4. | |
1358 | */ | |
a1ac18c4 | 1359 | static void |
6ae24471 | 1360 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1361 | { |
1362 | int ret = 0; | |
fa713d9e CF |
1363 | struct nexthop *nexthop, *tnexthop; |
1364 | int recursing; | |
718e3744 | 1365 | |
5adc2528 AS |
1366 | /* |
1367 | * Make sure we update the FPM any time we send new information to | |
1368 | * the kernel. | |
1369 | */ | |
1370 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1371 | switch (PREFIX_FAMILY (&rn->p)) |
1372 | { | |
1373 | case AF_INET: | |
6ae24471 DS |
1374 | if (update) |
1375 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1376 | else | |
1377 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1378 | break; |
1379 | #ifdef HAVE_IPV6 | |
1380 | case AF_INET6: | |
1381 | ret = kernel_add_ipv6 (&rn->p, rib); | |
1382 | break; | |
1383 | #endif /* HAVE_IPV6 */ | |
1384 | } | |
1385 | ||
dc95824a | 1386 | /* This condition is never met, if we are using rt_socket.c */ |
718e3744 | 1387 | if (ret < 0) |
1388 | { | |
fa713d9e | 1389 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1390 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1391 | } | |
1392 | } | |
1393 | ||
1394 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1395 | static int |
718e3744 | 1396 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1397 | { | |
1398 | int ret = 0; | |
fa713d9e CF |
1399 | struct nexthop *nexthop, *tnexthop; |
1400 | int recursing; | |
718e3744 | 1401 | |
5adc2528 AS |
1402 | /* |
1403 | * Make sure we update the FPM any time we send new information to | |
1404 | * the kernel. | |
1405 | */ | |
1406 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1407 | ||
718e3744 | 1408 | switch (PREFIX_FAMILY (&rn->p)) |
1409 | { | |
1410 | case AF_INET: | |
1411 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1412 | break; | |
1413 | #ifdef HAVE_IPV6 | |
1414 | case AF_INET6: | |
1415 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1416 | break; | |
1417 | #endif /* HAVE_IPV6 */ | |
1418 | } | |
1419 | ||
fa713d9e | 1420 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1421 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1422 | ||
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1427 | static void |
718e3744 | 1428 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1429 | { | |
1430 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1431 | { | |
5adc2528 AS |
1432 | zfpm_trigger_update (rn, "rib_uninstall"); |
1433 | ||
718e3744 | 1434 | redistribute_delete (&rn->p, rib); |
1435 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1436 | rib_uninstall_kernel (rn, rib); | |
1437 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1438 | } | |
1439 | } | |
1440 | ||
6d691129 PJ |
1441 | static void rib_unlink (struct route_node *, struct rib *); |
1442 | ||
9fd92e3c AS |
1443 | /* |
1444 | * rib_can_delete_dest | |
1445 | * | |
1446 | * Returns TRUE if the given dest can be deleted from the table. | |
1447 | */ | |
1448 | static int | |
1449 | rib_can_delete_dest (rib_dest_t *dest) | |
1450 | { | |
1451 | if (dest->routes) | |
1452 | { | |
1453 | return 0; | |
1454 | } | |
1455 | ||
5adc2528 AS |
1456 | /* |
1457 | * Don't delete the dest if we have to update the FPM about this | |
1458 | * prefix. | |
1459 | */ | |
1460 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1461 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1462 | return 0; | |
1463 | ||
9fd92e3c AS |
1464 | return 1; |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * rib_gc_dest | |
1469 | * | |
1470 | * Garbage collect the rib dest corresponding to the given route node | |
1471 | * if appropriate. | |
1472 | * | |
1473 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1474 | */ | |
1475 | int | |
1476 | rib_gc_dest (struct route_node *rn) | |
1477 | { | |
1478 | rib_dest_t *dest; | |
1479 | char buf[INET6_ADDRSTRLEN]; | |
1480 | ||
1481 | dest = rib_dest_from_rnode (rn); | |
1482 | if (!dest) | |
1483 | return 0; | |
1484 | ||
1485 | if (!rib_can_delete_dest (dest)) | |
1486 | return 0; | |
1487 | ||
1488 | if (IS_ZEBRA_DEBUG_RIB) | |
1489 | { | |
1490 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1491 | zlog_debug ("%s: %s/%d: removing dest from table", __func__, | |
1492 | buf, rn->p.prefixlen); | |
1493 | } | |
1494 | ||
1495 | dest->rnode = NULL; | |
1496 | XFREE (MTYPE_RIB_DEST, dest); | |
1497 | rn->info = NULL; | |
1498 | ||
1499 | /* | |
1500 | * Release the one reference that we keep on the route node. | |
1501 | */ | |
1502 | route_unlock_node (rn); | |
1503 | return 1; | |
1504 | } | |
1505 | ||
718e3744 | 1506 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1507 | static void |
1508 | rib_process (struct route_node *rn) | |
718e3744 | 1509 | { |
1510 | struct rib *rib; | |
1511 | struct rib *next; | |
1512 | struct rib *fib = NULL; | |
1513 | struct rib *select = NULL; | |
6d691129 | 1514 | struct rib *del = NULL; |
d753e9ee | 1515 | int installed = 0; |
fa713d9e CF |
1516 | struct nexthop *nexthop = NULL, *tnexthop; |
1517 | int recursing; | |
f304cb48 | 1518 | char buf[INET6_ADDRSTRLEN]; |
6ae24471 | 1519 | int update_ok = 0; |
4d38fdb4 | 1520 | |
1521 | assert (rn); | |
1522 | ||
93bdadae | 1523 | if (IS_ZEBRA_DEBUG_RIB || IS_ZEBRA_DEBUG_RIB_Q) |
f304cb48 | 1524 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1525 | |
9fd92e3c | 1526 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1527 | { |
6e26278c DS |
1528 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1529 | ||
718e3744 | 1530 | /* Currently installed rib. */ |
1531 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1532 | { |
1533 | assert (fib == NULL); | |
1534 | fib = rib; | |
1535 | } | |
ca657c65 | 1536 | |
6d691129 PJ |
1537 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1538 | * which we need to do do further work with below. | |
1539 | */ | |
1540 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1541 | { | |
1542 | if (rib != fib) | |
1543 | { | |
1544 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1545 | zlog_debug ("%s: %s/%d: rn %p, removing rib %p", __func__, |
1546 | buf, rn->p.prefixlen, rn, rib); | |
9fd92e3c | 1547 | rib_unlink (rn, rib); |
6d691129 PJ |
1548 | } |
1549 | else | |
1550 | del = rib; | |
1551 | ||
1552 | continue; | |
1553 | } | |
4d38fdb4 | 1554 | |
718e3744 | 1555 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1556 | /* This first call to nexthop_active_update is merely to determine if |
1557 | * there's any change to nexthops associated with this RIB entry. Now, | |
1558 | * rib_process() can be invoked due to an external event such as link | |
1559 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1560 | * a decision has already been made that the NHs have changed. So, no | |
1561 | * need to invoke a potentially expensive call again. Further, since | |
1562 | * the change might be in a recursive NH which is not caught in | |
1563 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1564 | * recursive NHs. | |
6e26278c | 1565 | */ |
ca657c65 | 1566 | if (!CHECK_FLAG(rib->flags, ZEBRA_FLAG_CHANGED) && |
6e26278c | 1567 | ! nexthop_active_update (rn, rib, 0)) |
7021c425 | 1568 | continue; |
718e3744 | 1569 | |
1570 | /* Infinit distance. */ | |
1571 | if (rib->distance == DISTANCE_INFINITY) | |
8733ba72 DS |
1572 | { |
1573 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1574 | continue; | |
1575 | } | |
718e3744 | 1576 | |
af887b51 | 1577 | /* Newly selected rib, the common case. */ |
1578 | if (!select) | |
1579 | { | |
1580 | select = rib; | |
1581 | continue; | |
1582 | } | |
1583 | ||
1584 | /* filter route selection in following order: | |
af887b51 | 1585 | * - connected beats other types |
a8d9c1f9 | 1586 | * - lower distance beats higher |
af887b51 | 1587 | * - lower metric beats higher for equal distance |
1588 | * - last, hence oldest, route wins tie break. | |
1589 | */ | |
a1038a15 | 1590 | |
1591 | /* Connected routes. Pick the last connected | |
1592 | * route of the set of lowest metric connected routes. | |
1593 | */ | |
a8d9c1f9 | 1594 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1595 | { | |
a1038a15 | 1596 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1597 | || rib->metric <= select->metric) |
8733ba72 DS |
1598 | { |
1599 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1600 | select = rib; | |
1601 | } | |
1602 | else | |
1603 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
a1038a15 | 1604 | continue; |
a8d9c1f9 | 1605 | } |
1606 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
8733ba72 DS |
1607 | { |
1608 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1609 | continue; | |
1610 | } | |
a8d9c1f9 | 1611 | |
1612 | /* higher distance loses */ | |
1613 | if (rib->distance > select->distance) | |
8733ba72 DS |
1614 | { |
1615 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1616 | continue; | |
1617 | } | |
a8d9c1f9 | 1618 | |
1619 | /* lower wins */ | |
1620 | if (rib->distance < select->distance) | |
1621 | { | |
8733ba72 | 1622 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
af887b51 | 1623 | select = rib; |
a8d9c1f9 | 1624 | continue; |
1625 | } | |
1626 | ||
1627 | /* metric tie-breaks equal distance */ | |
1628 | if (rib->metric <= select->metric) | |
8733ba72 DS |
1629 | { |
1630 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1631 | select = rib; | |
1632 | } | |
9fd92e3c | 1633 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1634 | |
1635 | /* After the cycle is finished, the following pointers will be set: | |
1636 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1637 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1638 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1639 | * rib --- NULL | |
1640 | */ | |
1641 | ||
1642 | /* Same RIB entry is selected. Update FIB and finish. */ | |
718e3744 | 1643 | if (select && select == fib) |
1644 | { | |
6d691129 | 1645 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1646 | zlog_debug ("%s: %s/%d: Updating existing route, select %p, fib %p", |
1647 | __func__, buf, rn->p.prefixlen, select, fib); | |
718e3744 | 1648 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1649 | { |
5adc2528 AS |
1650 | zfpm_trigger_update (rn, "updating existing route"); |
1651 | ||
4d38fdb4 | 1652 | redistribute_delete (&rn->p, select); |
6ae24471 | 1653 | |
4d38fdb4 | 1654 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 DS |
1655 | { |
1656 | /* For v4, use the replace semantics of netlink. */ | |
1657 | if (PREFIX_FAMILY (&rn->p) == AF_INET) | |
1658 | update_ok = 1; | |
1659 | else | |
1660 | rib_uninstall_kernel (rn, select); | |
1661 | } | |
1662 | ||
718e3744 | 1663 | |
4d38fdb4 | 1664 | /* Set real nexthop. */ |
6e26278c DS |
1665 | /* Need to check if any NHs are active to clear the |
1666 | * the selected flag | |
1667 | */ | |
1668 | if (nexthop_active_update (rn, select, 1)) | |
1669 | { | |
6ae24471 DS |
1670 | /* Clear FIB flag for IPv4, install will set it */ |
1671 | if (update_ok) | |
1672 | { | |
1673 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) | |
1674 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1675 | } | |
6e26278c | 1676 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1677 | rib_install_kernel (rn, select, update_ok); |
6e26278c DS |
1678 | redistribute_add (&rn->p, select); |
1679 | } | |
1680 | else | |
1681 | { | |
6ae24471 DS |
1682 | /* For IPv4, do the uninstall here. */ |
1683 | if (update_ok) | |
1684 | rib_uninstall_kernel (rn, select); | |
6e26278c DS |
1685 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1686 | } | |
ca657c65 | 1687 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
6e26278c | 1688 | } |
d753e9ee | 1689 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1690 | { |
1691 | /* Housekeeping code to deal with | |
1692 | race conditions in kernel with linux | |
1693 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1694 | is ready to add routes. | |
1695 | This makes sure the routes are IN the kernel. | |
1696 | */ | |
1697 | ||
fa713d9e | 1698 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1699 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1700 | { |
a3aaf5b0 DO |
1701 | installed = 1; |
1702 | break; | |
4d38fdb4 | 1703 | } |
1704 | if (! installed) | |
6ae24471 | 1705 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1706 | } |
6d691129 | 1707 | goto end; |
718e3744 | 1708 | } |
1709 | ||
dc95824a DO |
1710 | /* At this point we either haven't found the best RIB entry or it is |
1711 | * different from what we currently intend to flag with SELECTED. In both | |
1712 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1713 | */ | |
718e3744 | 1714 | if (fib) |
1715 | { | |
6d691129 | 1716 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1717 | zlog_debug ("%s: %s/%d: Removing existing route, fib %p", __func__, |
1718 | buf, rn->p.prefixlen, fib); | |
5adc2528 AS |
1719 | |
1720 | zfpm_trigger_update (rn, "removing existing route"); | |
1721 | ||
718e3744 | 1722 | redistribute_delete (&rn->p, fib); |
6ae24471 | 1723 | |
718e3744 | 1724 | if (! RIB_SYSTEM_ROUTE (fib)) |
6ae24471 DS |
1725 | { |
1726 | /* For v4, use the replace semantics of netlink -- only if there is | |
1727 | * another route to replace this with. | |
1728 | */ | |
1729 | if (PREFIX_FAMILY (&rn->p) == AF_INET) | |
1730 | { | |
1731 | if (!select || RIB_SYSTEM_ROUTE(select)) | |
1732 | rib_uninstall_kernel (rn, fib); | |
1733 | else | |
1734 | update_ok = 1; | |
1735 | } | |
1736 | else | |
1737 | rib_uninstall_kernel (rn, fib); | |
1738 | } | |
718e3744 | 1739 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1740 | ||
1741 | /* Set real nexthop. */ | |
1742 | nexthop_active_update (rn, fib, 1); | |
ca657c65 | 1743 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1744 | } |
1745 | ||
dc95824a DO |
1746 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1747 | * tell, that if a new winner exists, FIB is still not updated with this | |
1748 | * data, but ready to be. | |
1749 | */ | |
718e3744 | 1750 | if (select) |
1751 | { | |
6d691129 | 1752 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1753 | zlog_debug ("%s: %s/%d: Adding route, select %p", __func__, buf, |
1754 | rn->p.prefixlen, select); | |
5adc2528 AS |
1755 | |
1756 | zfpm_trigger_update (rn, "new route selected"); | |
1757 | ||
718e3744 | 1758 | /* Set real nexthop. */ |
6e26278c DS |
1759 | if (nexthop_active_update (rn, select, 1)) |
1760 | { | |
6ae24471 DS |
1761 | /* Clear FIB flag for IPv4 for previous installed route. */ |
1762 | if (update_ok) | |
1763 | { | |
1764 | assert (fib); | |
1765 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1766 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1767 | } | |
6e26278c | 1768 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1769 | rib_install_kernel (rn, select, update_ok); |
6e26278c DS |
1770 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1771 | redistribute_add (&rn->p, select); | |
1772 | } | |
6ae24471 DS |
1773 | else |
1774 | { | |
1775 | /* For IPv4, uninstall prior route here, if any. */ | |
1776 | if (update_ok) | |
1777 | { | |
1778 | assert (fib); | |
1779 | rib_uninstall_kernel (rn, fib); | |
1780 | } | |
1781 | } | |
ca657c65 | 1782 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1783 | } |
4d38fdb4 | 1784 | |
6d691129 PJ |
1785 | /* FIB route was removed, should be deleted */ |
1786 | if (del) | |
1787 | { | |
1788 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1789 | zlog_debug ("%s: %s/%d: Deleting fib %p, rn %p", __func__, buf, |
1790 | rn->p.prefixlen, del, rn); | |
6d691129 PJ |
1791 | rib_unlink (rn, del); |
1792 | } | |
4d38fdb4 | 1793 | |
6d691129 PJ |
1794 | end: |
1795 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
93bdadae | 1796 | zlog_debug ("%s: %s/%d: rn %p dequeued", __func__, buf, rn->p.prefixlen, rn); |
9fd92e3c AS |
1797 | |
1798 | /* | |
1799 | * Check if the dest can be deleted now. | |
1800 | */ | |
1801 | rib_gc_dest (rn); | |
e96f9203 DO |
1802 | } |
1803 | ||
5110a0c6 SH |
1804 | /* Take a list of route_node structs and return 1, if there was a record |
1805 | * picked from it and processed by rib_process(). Don't process more, | |
1806 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1807 | */ |
ef9b113e | 1808 | static unsigned int |
e96f9203 DO |
1809 | process_subq (struct list * subq, u_char qindex) |
1810 | { | |
5110a0c6 | 1811 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1812 | struct route_node *rnode; |
5110a0c6 SH |
1813 | |
1814 | if (!lnode) | |
e96f9203 | 1815 | return 0; |
5110a0c6 | 1816 | |
e96f9203 DO |
1817 | rnode = listgetdata (lnode); |
1818 | rib_process (rnode); | |
5110a0c6 | 1819 | |
9fd92e3c AS |
1820 | if (rnode->info) |
1821 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1822 | ||
67b9467f | 1823 | #if 0 |
5110a0c6 SH |
1824 | else |
1825 | { | |
1826 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1827 | __func__, rnode, rnode->lock); | |
1828 | zlog_backtrace(LOG_DEBUG); | |
1829 | } | |
67b9467f | 1830 | #endif |
e96f9203 DO |
1831 | route_unlock_node (rnode); |
1832 | list_delete_node (subq, lnode); | |
1833 | return 1; | |
1834 | } | |
1835 | ||
fb018d25 DS |
1836 | /* |
1837 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1838 | */ | |
1839 | static void | |
1840 | meta_queue_process_complete (struct work_queue *dummy) | |
1841 | { | |
078430f6 DS |
1842 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
1843 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 | 1844 | #ifdef HAVE_IPV6 |
078430f6 DS |
1845 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); |
1846 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 DS |
1847 | #endif /* HAVE_IPV6 */ |
1848 | } | |
1849 | ||
e96f9203 DO |
1850 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1851 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1852 | * is pointed to the meta queue structure. | |
1853 | */ | |
1854 | static wq_item_status | |
1855 | meta_queue_process (struct work_queue *dummy, void *data) | |
1856 | { | |
1857 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1858 | unsigned i; |
1859 | ||
e96f9203 DO |
1860 | for (i = 0; i < MQ_SIZE; i++) |
1861 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1862 | { |
1863 | mq->size--; | |
1864 | break; | |
1865 | } | |
e96f9203 DO |
1866 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1867 | } | |
1868 | ||
9fd92e3c AS |
1869 | /* |
1870 | * Map from rib types to queue type (priority) in meta queue | |
1871 | */ | |
5110a0c6 SH |
1872 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1873 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1874 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1875 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1876 | [ZEBRA_ROUTE_STATIC] = 1, | |
1877 | [ZEBRA_ROUTE_RIP] = 2, | |
1878 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1879 | [ZEBRA_ROUTE_OSPF] = 2, | |
1880 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1881 | [ZEBRA_ROUTE_ISIS] = 2, | |
1882 | [ZEBRA_ROUTE_BGP] = 3, | |
1883 | [ZEBRA_ROUTE_HSLS] = 4, | |
5734509c | 1884 | [ZEBRA_ROUTE_BABEL] = 2, |
7a4bb9c5 | 1885 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
1886 | }; |
1887 | ||
1888 | /* Look into the RN and queue it into one or more priority queues, | |
1889 | * increasing the size for each data push done. | |
e96f9203 | 1890 | */ |
ef9b113e SH |
1891 | static void |
1892 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1893 | { |
e96f9203 DO |
1894 | struct rib *rib; |
1895 | char buf[INET6_ADDRSTRLEN]; | |
5110a0c6 | 1896 | |
e96f9203 DO |
1897 | if (IS_ZEBRA_DEBUG_RIB_Q) |
1898 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
5110a0c6 | 1899 | |
9fd92e3c | 1900 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1901 | { |
5110a0c6 SH |
1902 | u_char qindex = meta_queue_map[rib->type]; |
1903 | ||
1904 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1905 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1906 | RIB_ROUTE_QUEUED (qindex))) | |
5110a0c6 SH |
1907 | { |
1908 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1909 | zlog_debug ("%s: %s/%d: rn %p is already queued in sub-queue %u", | |
1910 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
1911 | continue; | |
1912 | } | |
1913 | ||
9fd92e3c | 1914 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1915 | listnode_add (mq->subq[qindex], rn); |
1916 | route_lock_node (rn); | |
1917 | mq->size++; | |
1918 | ||
e96f9203 | 1919 | if (IS_ZEBRA_DEBUG_RIB_Q) |
5110a0c6 SH |
1920 | zlog_debug ("%s: %s/%d: queued rn %p into sub-queue %u", |
1921 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
e96f9203 | 1922 | } |
4d38fdb4 | 1923 | } |
1924 | ||
6d691129 | 1925 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 1926 | void |
6d691129 | 1927 | rib_queue_add (struct zebra_t *zebra, struct route_node *rn) |
4d38fdb4 | 1928 | { |
fc328ac9 SV |
1929 | char buf[INET_ADDRSTRLEN]; |
1930 | assert (zebra && rn); | |
4d38fdb4 | 1931 | |
93bdadae | 1932 | if (IS_ZEBRA_DEBUG_RIB_Q) |
fc328ac9 SV |
1933 | inet_ntop (AF_INET, &rn->p.u.prefix, buf, INET_ADDRSTRLEN); |
1934 | ||
1935 | /* Pointless to queue a route_node with no RIB entries to add or remove */ | |
9fd92e3c | 1936 | if (!rnode_to_ribs (rn)) |
6d691129 | 1937 | { |
fc328ac9 SV |
1938 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
1939 | __func__, rn, rn->lock); | |
1940 | zlog_backtrace(LOG_DEBUG); | |
1941 | return; | |
1942 | } | |
1943 | ||
1944 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1945 | zlog_info ("%s: %s/%d: work queue added", __func__, buf, rn->p.prefixlen); | |
1946 | ||
1947 | assert (zebra); | |
4d38fdb4 | 1948 | |
fc328ac9 SV |
1949 | if (zebra->ribq == NULL) |
1950 | { | |
1951 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1952 | return; | |
4d38fdb4 | 1953 | } |
4d38fdb4 | 1954 | |
cc2dd928 SH |
1955 | /* |
1956 | * The RIB queue should normally be either empty or holding the only | |
1957 | * work_queue_item element. In the latter case this element would | |
1958 | * hold a pointer to the meta queue structure, which must be used to | |
1959 | * actually queue the route nodes to process. So create the MQ | |
1960 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1961 | * This semantics was introduced after 0.99.9 release. |
1962 | */ | |
e96f9203 DO |
1963 | if (!zebra->ribq->items->count) |
1964 | work_queue_add (zebra->ribq, zebra->mq); | |
1965 | ||
1966 | rib_meta_queue_add (zebra->mq, rn); | |
fc328ac9 SV |
1967 | |
1968 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1969 | zlog_debug ("%s: %s/%d: rn %p queued", __func__, buf, rn->p.prefixlen, rn); | |
1970 | ||
1971 | return; | |
4d38fdb4 | 1972 | } |
1973 | ||
5110a0c6 SH |
1974 | /* Create new meta queue. |
1975 | A destructor function doesn't seem to be necessary here. | |
1976 | */ | |
ef9b113e SH |
1977 | static struct meta_queue * |
1978 | meta_queue_new (void) | |
e96f9203 DO |
1979 | { |
1980 | struct meta_queue *new; | |
5110a0c6 SH |
1981 | unsigned i; |
1982 | ||
1983 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1984 | assert(new); | |
e96f9203 | 1985 | |
e96f9203 | 1986 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1987 | { |
1988 | new->subq[i] = list_new (); | |
1989 | assert(new->subq[i]); | |
1990 | } | |
1991 | ||
e96f9203 DO |
1992 | return new; |
1993 | } | |
1994 | ||
4d38fdb4 | 1995 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1996 | static void |
4d38fdb4 | 1997 | rib_queue_init (struct zebra_t *zebra) |
1998 | { | |
fc328ac9 SV |
1999 | assert (zebra); |
2000 | ||
4d38fdb4 | 2001 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 2002 | "route_node processing"))) |
4d38fdb4 | 2003 | { |
6d691129 | 2004 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 2005 | return; |
2006 | } | |
2007 | ||
2008 | /* fill in the work queue spec */ | |
e96f9203 | 2009 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2010 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2011 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2012 | /* XXX: TODO: These should be runtime configurable via vty */ |
2013 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2014 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2015 | |
e96f9203 | 2016 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2017 | { |
e96f9203 | 2018 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2019 | return; |
2020 | } | |
2021 | return; | |
718e3744 | 2022 | } |
2023 | ||
6d691129 PJ |
2024 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2025 | * | |
2026 | * The queue length is bounded by the maximal size of the routing table, | |
2027 | * as a route_node will not be requeued, if already queued. | |
2028 | * | |
3c0755dc PJ |
2029 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
2030 | * state, or static_install_ipv{4,6} (when an existing RIB is updated) | |
2031 | * and then submit route_node to queue for best-path selection later. | |
2032 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2033 | * |
2034 | * Deleted RIBs are reaped during best-path selection. | |
2035 | * | |
2036 | * rib_addnode | |
2037 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2038 | * |-------->| | best RIB, if required |
2039 | * | | | |
2040 | * static_install->|->rib_addqueue...... -> rib_process | |
2041 | * | | | |
2042 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2043 | * |-> set RIB_ENTRY_REMOVE | |
2044 | * rib_delnode (RIB freed) | |
2045 | * | |
9fd92e3c AS |
2046 | * The 'info' pointer of a route_node points to a rib_dest_t |
2047 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2048 | * dest is created on-demand by rib_link() and is kept around at least | |
2049 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2050 | * |
2051 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2052 | * | |
2053 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2054 | * - dest attached to route_node: |
2055 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2056 | * - route_node processing queue |
2057 | * - managed by: rib_addqueue, rib_process. | |
2058 | * | |
2059 | */ | |
2060 | ||
718e3744 | 2061 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2062 | static void |
6d691129 | 2063 | rib_link (struct route_node *rn, struct rib *rib) |
718e3744 | 2064 | { |
2065 | struct rib *head; | |
9fd92e3c | 2066 | rib_dest_t *dest; |
f304cb48 | 2067 | char buf[INET6_ADDRSTRLEN]; |
7a4bb9c5 | 2068 | afi_t afi; |
9fd92e3c | 2069 | |
4d38fdb4 | 2070 | assert (rib && rn); |
2071 | ||
6d691129 | 2072 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2073 | { |
f304cb48 | 2074 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2075 | zlog_debug ("%s: %s/%d: rn %p, rib %p", __func__, |
2076 | buf, rn->p.prefixlen, rn, rib); | |
2077 | } | |
6d691129 | 2078 | |
9fd92e3c AS |
2079 | dest = rib_dest_from_rnode (rn); |
2080 | if (!dest) | |
6d691129 PJ |
2081 | { |
2082 | if (IS_ZEBRA_DEBUG_RIB) | |
9fd92e3c AS |
2083 | { |
2084 | zlog_debug ("%s: %s/%d: adding dest to table", __func__, | |
2085 | buf, rn->p.prefixlen); | |
2086 | } | |
2087 | ||
2088 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2089 | route_lock_node (rn); /* rn route table reference */ | |
2090 | rn->info = dest; | |
2091 | dest->rnode = rn; | |
2092 | } | |
2093 | ||
2094 | head = dest->routes; | |
2095 | if (head) | |
2096 | { | |
6d691129 | 2097 | head->prev = rib; |
6d691129 | 2098 | } |
718e3744 | 2099 | rib->next = head; |
9fd92e3c | 2100 | dest->routes = rib; |
7a4bb9c5 DS |
2101 | |
2102 | /* Further processing only if entry is in main table */ | |
2103 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2104 | rib_queue_add (&zebrad, rn); | |
2105 | else | |
2106 | { | |
2107 | if (IS_ZEBRA_DEBUG_RIB) | |
2108 | { | |
2109 | zlog_debug ("%s: %s/%d: Skipping further RIB processing of non-main table", | |
2110 | __func__, buf, rn->p.prefixlen); | |
2111 | } | |
2112 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2113 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2114 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2115 | zebra_add_import_table_entry(rn, rib); | |
2116 | } | |
718e3744 | 2117 | } |
2118 | ||
a1ac18c4 | 2119 | static void |
6d691129 | 2120 | rib_addnode (struct route_node *rn, struct rib *rib) |
718e3744 | 2121 | { |
6d691129 PJ |
2122 | /* RIB node has been un-removed before route-node is processed. |
2123 | * route_node must hence already be on the queue for processing.. | |
2124 | */ | |
2125 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2126 | { | |
2127 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2128 | { |
f304cb48 DO |
2129 | char buf[INET6_ADDRSTRLEN]; |
2130 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2131 | zlog_debug ("%s: %s/%d: rn %p, un-removed rib %p", |
2132 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2133 | } | |
6d691129 PJ |
2134 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2135 | return; | |
2136 | } | |
2137 | rib_link (rn, rib); | |
2138 | } | |
2139 | ||
9fd92e3c AS |
2140 | /* |
2141 | * rib_unlink | |
2142 | * | |
2143 | * Detach a rib structure from a route_node. | |
2144 | * | |
2145 | * Note that a call to rib_unlink() should be followed by a call to | |
2146 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2147 | * longer required to be deleted. | |
2148 | */ | |
6d691129 PJ |
2149 | static void |
2150 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2151 | { | |
f304cb48 | 2152 | char buf[INET6_ADDRSTRLEN]; |
9fd92e3c | 2153 | rib_dest_t *dest; |
6d691129 | 2154 | |
4d38fdb4 | 2155 | assert (rn && rib); |
6d691129 PJ |
2156 | |
2157 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2158 | { |
f304cb48 | 2159 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2160 | zlog_debug ("%s: %s/%d: rn %p, rib %p", |
2161 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2162 | } | |
6d691129 | 2163 | |
9fd92e3c AS |
2164 | dest = rib_dest_from_rnode (rn); |
2165 | ||
718e3744 | 2166 | if (rib->next) |
2167 | rib->next->prev = rib->prev; | |
6d691129 | 2168 | |
718e3744 | 2169 | if (rib->prev) |
2170 | rib->prev->next = rib->next; | |
2171 | else | |
6d691129 | 2172 | { |
9fd92e3c | 2173 | dest->routes = rib->next; |
6d691129 PJ |
2174 | } |
2175 | ||
2176 | /* free RIB and nexthops */ | |
6e26278c | 2177 | nexthops_free(rib->nexthop, rn); |
6d691129 PJ |
2178 | XFREE (MTYPE_RIB, rib); |
2179 | ||
6d691129 PJ |
2180 | } |
2181 | ||
2182 | static void | |
2183 | rib_delnode (struct route_node *rn, struct rib *rib) | |
2184 | { | |
7a4bb9c5 DS |
2185 | afi_t afi; |
2186 | ||
6d691129 | 2187 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2188 | { |
f304cb48 DO |
2189 | char buf[INET6_ADDRSTRLEN]; |
2190 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2191 | zlog_debug ("%s: %s/%d: rn %p, rib %p, removing", __func__, |
2192 | buf, rn->p.prefixlen, rn, rib); | |
2193 | } | |
6d691129 | 2194 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 DS |
2195 | |
2196 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2197 | rib_queue_add (&zebrad, rn); | |
2198 | else | |
2199 | { | |
2200 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2201 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2202 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2203 | zebra_del_import_table_entry(rn, rib); | |
2204 | /* Just clean up if non main table */ | |
2205 | rib_unlink(rn, rib); | |
2206 | } | |
718e3744 | 2207 | } |
2208 | ||
2209 | int | |
7c8ff89e | 2210 | rib_add_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7514fb77 | 2211 | struct in_addr *gate, struct in_addr *src, |
7a4bb9c5 | 2212 | unsigned int ifindex, u_int32_t table_id, |
cddf391b | 2213 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2214 | { |
2215 | struct rib *rib; | |
2216 | struct rib *same = NULL; | |
2217 | struct route_table *table; | |
2218 | struct route_node *rn; | |
2219 | struct nexthop *nexthop; | |
2220 | ||
2221 | /* Lookup table. */ | |
7a4bb9c5 DS |
2222 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2223 | { | |
2224 | table = vrf_table (AFI_IP, safi, 0); | |
2225 | } | |
2226 | else | |
2227 | { | |
2228 | table = vrf_other_route_table (AFI_IP, table_id, 0); | |
2229 | } | |
718e3744 | 2230 | if (! table) |
2231 | return 0; | |
2232 | ||
2233 | /* Make it sure prefixlen is applied to the prefix. */ | |
2234 | apply_mask_ipv4 (p); | |
2235 | ||
2236 | /* Set default distance by route type. */ | |
2237 | if (distance == 0) | |
2238 | { | |
837d16cc | 2239 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
2240 | distance = 150; |
2241 | else | |
2242 | distance = route_info[type].distance; | |
718e3744 | 2243 | |
2244 | /* iBGP distance is 200. */ | |
2245 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2246 | distance = 200; | |
2247 | } | |
2248 | ||
2249 | /* Lookup route node.*/ | |
2250 | rn = route_node_get (table, (struct prefix *) p); | |
2251 | ||
2252 | /* If same type of route are installed, treat it as a implicit | |
2253 | withdraw. */ | |
9fd92e3c | 2254 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2255 | { |
6d691129 PJ |
2256 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2257 | continue; | |
2258 | ||
ebf1ead0 | 2259 | if (rib->type != type) |
2260 | continue; | |
7c8ff89e DS |
2261 | if (rib->instance != instance) |
2262 | continue; | |
7a4bb9c5 | 2263 | |
ebf1ead0 | 2264 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2265 | { |
2266 | same = rib; | |
2267 | break; | |
2268 | } | |
ebf1ead0 | 2269 | /* Duplicate connected route comes in. */ |
2270 | else if ((nexthop = rib->nexthop) && | |
2271 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
2272 | nexthop->ifindex == ifindex && |
2273 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2274 | { |
2275 | rib->refcnt++; | |
2276 | return 0 ; | |
2277 | } | |
718e3744 | 2278 | } |
2279 | ||
2280 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2281 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 2282 | rib->type = type; |
7c8ff89e | 2283 | rib->instance = instance; |
718e3744 | 2284 | rib->distance = distance; |
2285 | rib->flags = flags; | |
2286 | rib->metric = metric; | |
7a4bb9c5 | 2287 | rib->table = table_id; |
718e3744 | 2288 | rib->nexthop_num = 0; |
2289 | rib->uptime = time (NULL); | |
2290 | ||
2291 | /* Nexthop settings. */ | |
2292 | if (gate) | |
2293 | { | |
2294 | if (ifindex) | |
7514fb77 | 2295 | nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 2296 | else |
7514fb77 | 2297 | nexthop_ipv4_add (rib, gate, src); |
718e3744 | 2298 | } |
2299 | else | |
2300 | nexthop_ifindex_add (rib, ifindex); | |
2301 | ||
2302 | /* If this route is kernel route, set FIB flag to the route. */ | |
2303 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2304 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2305 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2306 | ||
2307 | /* Link new rib to node.*/ | |
dc95824a | 2308 | if (IS_ZEBRA_DEBUG_RIB) |
7a4bb9c5 DS |
2309 | { |
2310 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2311 | __func__, rn, rib); | |
2312 | rib_dump ((struct prefix *)p, rib); | |
2313 | } | |
718e3744 | 2314 | rib_addnode (rn, rib); |
4d38fdb4 | 2315 | |
718e3744 | 2316 | /* Free implicit route.*/ |
2317 | if (same) | |
dc95824a DO |
2318 | { |
2319 | if (IS_ZEBRA_DEBUG_RIB) | |
2320 | zlog_debug ("%s: calling rib_delnode (%p, %p)", __func__, rn, rib); | |
4d38fdb4 | 2321 | rib_delnode (rn, same); |
dc95824a | 2322 | } |
4d38fdb4 | 2323 | |
2324 | route_unlock_node (rn); | |
718e3744 | 2325 | return 0; |
2326 | } | |
2327 | ||
dc95824a DO |
2328 | /* This function dumps the contents of a given RIB entry into |
2329 | * standard debug log. Calling function name and IP prefix in | |
2330 | * question are passed as 1st and 2nd arguments. | |
2331 | */ | |
2332 | ||
f7bf4153 DL |
2333 | void _rib_dump (const char * func, |
2334 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2335 | { |
f7bf4153 | 2336 | const struct prefix *p = pp.p; |
fed643f4 | 2337 | char straddr[INET6_ADDRSTRLEN]; |
fa713d9e CF |
2338 | struct nexthop *nexthop, *tnexthop; |
2339 | int recursing; | |
dc95824a | 2340 | |
fed643f4 | 2341 | inet_ntop (p->family, &p->u.prefix, straddr, INET6_ADDRSTRLEN); |
fa713d9e | 2342 | zlog_debug ("%s: dumping RIB entry %p for %s/%d", func, rib, straddr, p->prefixlen); |
dc95824a DO |
2343 | zlog_debug |
2344 | ( | |
7c8ff89e | 2345 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2346 | func, |
2347 | rib->refcnt, | |
d02c56cd | 2348 | (unsigned long) rib->uptime, |
dc95824a | 2349 | rib->type, |
7c8ff89e | 2350 | rib->instance, |
dc95824a DO |
2351 | rib->table |
2352 | ); | |
2353 | zlog_debug | |
2354 | ( | |
2355 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
2356 | func, | |
2357 | rib->metric, | |
2358 | rib->distance, | |
2359 | rib->flags, | |
2360 | rib->status | |
2361 | ); | |
2362 | zlog_debug | |
2363 | ( | |
2364 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2365 | func, | |
2366 | rib->nexthop_num, | |
2367 | rib->nexthop_active_num, | |
2368 | rib->nexthop_fib_num | |
2369 | ); | |
fed643f4 | 2370 | |
fa713d9e CF |
2371 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2372 | { | |
fed643f4 | 2373 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2374 | zlog_debug |
2375 | ( | |
2376 | "%s: %s %s with flags %s%s%s", | |
2377 | func, | |
2378 | (recursing ? " NH" : "NH"), | |
2379 | straddr, | |
2380 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2381 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2382 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2383 | ); | |
2384 | } | |
dc95824a DO |
2385 | zlog_debug ("%s: dump complete", func); |
2386 | } | |
2387 | ||
2388 | /* This is an exported helper to rtm_read() to dump the strange | |
2389 | * RIB entry found by rib_lookup_ipv4_route() | |
2390 | */ | |
2391 | ||
2392 | void rib_lookup_and_dump (struct prefix_ipv4 * p) | |
2393 | { | |
2394 | struct route_table *table; | |
2395 | struct route_node *rn; | |
2396 | struct rib *rib; | |
2397 | char prefix_buf[INET_ADDRSTRLEN]; | |
2398 | ||
2399 | /* Lookup table. */ | |
2400 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2401 | if (! table) | |
2402 | { | |
2403 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
2404 | return; | |
2405 | } | |
2406 | ||
2407 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
2408 | /* Scan the RIB table for exactly matching RIB entry. */ | |
2409 | rn = route_node_lookup (table, (struct prefix *) p); | |
2410 | ||
2411 | /* No route for this prefix. */ | |
2412 | if (! rn) | |
2413 | { | |
2414 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
2415 | return; | |
2416 | } | |
2417 | ||
2418 | /* Unlock node. */ | |
2419 | route_unlock_node (rn); | |
2420 | ||
2421 | /* let's go */ | |
9fd92e3c | 2422 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2423 | { |
2424 | zlog_debug | |
2425 | ( | |
2426 | "%s: rn %p, rib %p: %s, %s", | |
2427 | __func__, | |
2428 | rn, | |
2429 | rib, | |
2430 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
2431 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2432 | ); | |
f7bf4153 | 2433 | rib_dump (p, rib); |
dc95824a DO |
2434 | } |
2435 | } | |
2436 | ||
20e5ff0a DO |
2437 | /* Check if requested address assignment will fail due to another |
2438 | * route being installed by zebra in FIB already. Take necessary | |
2439 | * actions, if needed: remove such a route from FIB and deSELECT | |
2440 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2441 | */ | |
2442 | void rib_lookup_and_pushup (struct prefix_ipv4 * p) | |
2443 | { | |
2444 | struct route_table *table; | |
2445 | struct route_node *rn; | |
2446 | struct rib *rib; | |
2447 | unsigned changed = 0; | |
2448 | ||
2449 | if (NULL == (table = vrf_table (AFI_IP, SAFI_UNICAST, 0))) | |
2450 | { | |
2451 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
2452 | return; | |
2453 | } | |
2454 | ||
2455 | /* No matches would be the simplest case. */ | |
2456 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2457 | return; | |
2458 | ||
2459 | /* Unlock node. */ | |
2460 | route_unlock_node (rn); | |
2461 | ||
2462 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2463 | * the RN into RIBQ head. If the routing message about the new connected | |
2464 | * route (generated by the IP address we are going to assign very soon) | |
2465 | * comes before the RIBQ is processed, the new RIB entry will join | |
2466 | * RIBQ record already on head. This is necessary for proper revalidation | |
2467 | * of the rest of the RIB. | |
2468 | */ | |
9fd92e3c | 2469 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2470 | { |
2471 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2472 | ! RIB_SYSTEM_ROUTE (rib)) | |
2473 | { | |
2474 | changed = 1; | |
2475 | if (IS_ZEBRA_DEBUG_RIB) | |
2476 | { | |
2477 | char buf[INET_ADDRSTRLEN]; | |
2478 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
2479 | zlog_debug ("%s: freeing way for connected prefix %s/%d", __func__, buf, p->prefixlen); | |
f7bf4153 | 2480 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2481 | } |
2482 | rib_uninstall (rn, rib); | |
2483 | } | |
2484 | } | |
2485 | if (changed) | |
20e5ff0a | 2486 | rib_queue_add (&zebrad, rn); |
20e5ff0a DO |
2487 | } |
2488 | ||
718e3744 | 2489 | int |
cddf391b | 2490 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2491 | { |
2492 | struct route_table *table; | |
2493 | struct route_node *rn; | |
2494 | struct rib *same; | |
2495 | struct nexthop *nexthop; | |
04b02fda | 2496 | int ret = 0; |
4d38fdb4 | 2497 | |
718e3744 | 2498 | /* Lookup table. */ |
7a4bb9c5 DS |
2499 | if ((rib->table == zebrad.rtm_table_default) || (rib->table == RT_TABLE_MAIN)) |
2500 | { | |
2501 | table = vrf_table (AFI_IP, safi, 0); | |
2502 | } | |
2503 | else | |
2504 | { | |
2505 | table = vrf_other_route_table (AFI_IP, rib->table, 0); | |
2506 | } | |
718e3744 | 2507 | if (! table) |
2508 | return 0; | |
cddf391b | 2509 | |
718e3744 | 2510 | /* Make it sure prefixlen is applied to the prefix. */ |
2511 | apply_mask_ipv4 (p); | |
2512 | ||
2513 | /* Set default distance by route type. */ | |
2514 | if (rib->distance == 0) | |
2515 | { | |
2516 | rib->distance = route_info[rib->type].distance; | |
2517 | ||
2518 | /* iBGP distance is 200. */ | |
2519 | if (rib->type == ZEBRA_ROUTE_BGP | |
2520 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2521 | rib->distance = 200; | |
2522 | } | |
2523 | ||
2524 | /* Lookup route node.*/ | |
2525 | rn = route_node_get (table, (struct prefix *) p); | |
2526 | ||
2527 | /* If same type of route are installed, treat it as a implicit | |
2528 | withdraw. */ | |
9fd92e3c | 2529 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2530 | { |
0b8c4f1d | 2531 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2532 | continue; |
2533 | ||
7c8ff89e DS |
2534 | if (same->type == rib->type && same->instance == rib->instance |
2535 | && same->table == rib->table | |
718e3744 | 2536 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2537 | break; |
718e3744 | 2538 | } |
4d38fdb4 | 2539 | |
718e3744 | 2540 | /* If this route is kernel route, set FIB flag to the route. */ |
2541 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2542 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2543 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2544 | ||
2545 | /* Link new rib to node.*/ | |
2546 | rib_addnode (rn, rib); | |
04b02fda | 2547 | ret = 1; |
dc95824a DO |
2548 | if (IS_ZEBRA_DEBUG_RIB) |
2549 | { | |
2550 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2551 | __func__, rn, rib); | |
f7bf4153 | 2552 | rib_dump (p, rib); |
dc95824a | 2553 | } |
718e3744 | 2554 | |
718e3744 | 2555 | /* Free implicit route.*/ |
2556 | if (same) | |
dc95824a DO |
2557 | { |
2558 | if (IS_ZEBRA_DEBUG_RIB) | |
2559 | { | |
2560 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
2561 | __func__, rn, same); | |
f7bf4153 | 2562 | rib_dump (p, same); |
dc95824a | 2563 | } |
4d38fdb4 | 2564 | rib_delnode (rn, same); |
04b02fda | 2565 | ret = -1; |
dc95824a | 2566 | } |
4d38fdb4 | 2567 | |
2568 | route_unlock_node (rn); | |
04b02fda | 2569 | return ret; |
718e3744 | 2570 | } |
2571 | ||
ebf1ead0 | 2572 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2573 | int |
7c8ff89e | 2574 | rib_delete_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7a4bb9c5 DS |
2575 | struct in_addr *gate, unsigned int ifindex, |
2576 | u_int32_t table_id, safi_t safi) | |
718e3744 | 2577 | { |
2578 | struct route_table *table; | |
2579 | struct route_node *rn; | |
2580 | struct rib *rib; | |
2581 | struct rib *fib = NULL; | |
2582 | struct rib *same = NULL; | |
fa713d9e CF |
2583 | struct nexthop *nexthop, *tnexthop; |
2584 | int recursing; | |
81cce018 SH |
2585 | char buf1[INET_ADDRSTRLEN]; |
2586 | char buf2[INET_ADDRSTRLEN]; | |
718e3744 | 2587 | |
2588 | /* Lookup table. */ | |
7a4bb9c5 DS |
2589 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2590 | { | |
2591 | table = vrf_table (AFI_IP, safi, 0); | |
2592 | } | |
2593 | else | |
2594 | { | |
2595 | table = vrf_other_route_table(AFI_IP, table_id, 0); | |
2596 | } | |
718e3744 | 2597 | if (! table) |
2598 | return 0; | |
2599 | ||
2600 | /* Apply mask. */ | |
2601 | apply_mask_ipv4 (p); | |
2602 | ||
b52aef18 CF |
2603 | if (IS_ZEBRA_DEBUG_KERNEL) |
2604 | { | |
2605 | if (gate) | |
2606 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", | |
2607 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2608 | p->prefixlen, | |
2609 | inet_ntoa (*gate), | |
2610 | ifindex); | |
2611 | else | |
2612 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d ifindex %d", | |
2613 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2614 | p->prefixlen, | |
2615 | ifindex); | |
2616 | } | |
5ec90d28 | 2617 | |
718e3744 | 2618 | /* Lookup route node. */ |
2619 | rn = route_node_lookup (table, (struct prefix *) p); | |
2620 | if (! rn) | |
2621 | { | |
2622 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2623 | { | |
2624 | if (gate) | |
b6178002 | 2625 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2626 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2627 | p->prefixlen, |
81cce018 | 2628 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2629 | ifindex); |
2630 | else | |
b6178002 | 2631 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2632 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2633 | p->prefixlen, |
2634 | ifindex); | |
2635 | } | |
2636 | return ZEBRA_ERR_RTNOEXIST; | |
2637 | } | |
2638 | ||
2639 | /* Lookup same type route. */ | |
9fd92e3c | 2640 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2641 | { |
6d691129 PJ |
2642 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2643 | continue; | |
2644 | ||
718e3744 | 2645 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2646 | fib = rib; | |
2647 | ||
ebf1ead0 | 2648 | if (rib->type != type) |
2649 | continue; | |
7c8ff89e DS |
2650 | if (rib->instance != instance) |
2651 | continue; | |
ebf1ead0 | 2652 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2653 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2654 | { |
4f1735fd MF |
2655 | if (nexthop->ifindex != ifindex) |
2656 | continue; | |
ebf1ead0 | 2657 | if (rib->refcnt) |
718e3744 | 2658 | { |
ebf1ead0 | 2659 | rib->refcnt--; |
2660 | route_unlock_node (rn); | |
2661 | route_unlock_node (rn); | |
2662 | return 0; | |
718e3744 | 2663 | } |
ebf1ead0 | 2664 | same = rib; |
2665 | break; | |
718e3744 | 2666 | } |
ebf1ead0 | 2667 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2668 | else |
5ec90d28 | 2669 | { |
fa713d9e CF |
2670 | if (gate == NULL) |
2671 | { | |
2672 | same = rib; | |
2673 | break; | |
2674 | } | |
2675 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
2676 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate)) | |
2677 | { | |
2678 | same = rib; | |
2679 | break; | |
2680 | } | |
2681 | if (same) | |
2682 | break; | |
2683 | } | |
718e3744 | 2684 | } |
718e3744 | 2685 | /* If same type of route can't be found and this message is from |
2686 | kernel. */ | |
2687 | if (! same) | |
2688 | { | |
2037f143 DS |
2689 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2690 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2691 | { | |
2692 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2693 | { | |
2694 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
2695 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2696 | p->prefixlen); | |
2697 | } | |
2698 | /* This means someone else, other than Zebra, has deleted | |
2699 | * a Zebra router from the kernel. We will add it back */ | |
6ae24471 | 2700 | rib_install_kernel(rn, fib, 0); |
2037f143 | 2701 | } |
718e3744 | 2702 | else |
2703 | { | |
2704 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2705 | { | |
2706 | if (gate) | |
b6178002 | 2707 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2708 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2709 | p->prefixlen, |
81cce018 | 2710 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2711 | ifindex, |
2712 | type); | |
2713 | else | |
b6178002 | 2714 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2715 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2716 | p->prefixlen, |
2717 | ifindex, | |
2718 | type); | |
2719 | } | |
2720 | route_unlock_node (rn); | |
2721 | return ZEBRA_ERR_RTNOEXIST; | |
2722 | } | |
2723 | } | |
4d38fdb4 | 2724 | |
718e3744 | 2725 | if (same) |
4d38fdb4 | 2726 | rib_delnode (rn, same); |
2727 | ||
718e3744 | 2728 | route_unlock_node (rn); |
718e3744 | 2729 | return 0; |
2730 | } | |
6b0655a2 | 2731 | |
718e3744 | 2732 | /* Install static route into rib. */ |
a1ac18c4 | 2733 | static void |
718e3744 | 2734 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2735 | { | |
2736 | struct rib *rib; | |
2737 | struct route_node *rn; | |
2738 | struct route_table *table; | |
6e26278c | 2739 | struct prefix nh_p; |
718e3744 | 2740 | |
2741 | /* Lookup table. */ | |
2742 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2743 | if (! table) | |
2744 | return; | |
2745 | ||
2746 | /* Lookup existing route */ | |
2747 | rn = route_node_get (table, p); | |
9fd92e3c | 2748 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2749 | { |
2750 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2751 | continue; | |
2752 | ||
2753 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2754 | break; | |
2755 | } | |
718e3744 | 2756 | |
2757 | if (rib) | |
2758 | { | |
0d9551dc DS |
2759 | /* if tag value changed , update old value in RIB */ |
2760 | if (rib->tag != si->tag) | |
2761 | rib->tag = si->tag; | |
2762 | ||
718e3744 | 2763 | /* Same distance static route is there. Update it with new |
2764 | nexthop. */ | |
718e3744 | 2765 | route_unlock_node (rn); |
718e3744 | 2766 | switch (si->type) |
7021c425 | 2767 | { |
2768 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2769 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2770 | nh_p.family = AF_INET; |
2771 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2772 | nh_p.u.prefix4 = si->gate.ipv4; | |
2773 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2774 | break; |
2775 | case STATIC_IPV4_IFNAME: | |
2776 | nexthop_ifname_add (rib, si->gate.ifname); | |
2777 | break; | |
2778 | case STATIC_IPV4_BLACKHOLE: | |
2779 | nexthop_blackhole_add (rib); | |
2780 | break; | |
4d38fdb4 | 2781 | } |
3c0755dc | 2782 | rib_queue_add (&zebrad, rn); |
718e3744 | 2783 | } |
2784 | else | |
2785 | { | |
2786 | /* This is new static route. */ | |
4d38fdb4 | 2787 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2788 | ||
718e3744 | 2789 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 2790 | rib->instance = 0; |
718e3744 | 2791 | rib->distance = si->distance; |
2792 | rib->metric = 0; | |
b0145ddb | 2793 | rib->table = zebrad.rtm_table_default; |
718e3744 | 2794 | rib->nexthop_num = 0; |
0d9551dc | 2795 | rib->tag = si->tag; |
718e3744 | 2796 | |
2797 | switch (si->type) | |
7021c425 | 2798 | { |
2799 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2800 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2801 | nh_p.family = AF_INET; |
2802 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2803 | nh_p.u.prefix4 = si->gate.ipv4; | |
2804 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2805 | break; |
2806 | case STATIC_IPV4_IFNAME: | |
2807 | nexthop_ifname_add (rib, si->gate.ifname); | |
2808 | break; | |
2809 | case STATIC_IPV4_BLACKHOLE: | |
2810 | nexthop_blackhole_add (rib); | |
2811 | break; | |
2812 | } | |
718e3744 | 2813 | |
81dfcaa2 | 2814 | /* Save the flags of this static routes (reject, blackhole) */ |
2815 | rib->flags = si->flags; | |
2816 | ||
718e3744 | 2817 | /* Link this rib to the tree. */ |
2818 | rib_addnode (rn, rib); | |
718e3744 | 2819 | } |
2820 | } | |
2821 | ||
a1ac18c4 | 2822 | static int |
718e3744 | 2823 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
2824 | { | |
2825 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2826 | && si->type == STATIC_IPV4_GATEWAY | |
2827 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
2828 | return 1; | |
2829 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2830 | && si->type == STATIC_IPV4_IFNAME | |
2831 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
2832 | return 1; | |
595db7f1 | 2833 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2834 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2835 | return 1; | |
e8e1946e | 2836 | return 0; |
718e3744 | 2837 | } |
2838 | ||
2839 | /* Uninstall static route from RIB. */ | |
a1ac18c4 | 2840 | static void |
718e3744 | 2841 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2842 | { | |
2843 | struct route_node *rn; | |
2844 | struct rib *rib; | |
2845 | struct nexthop *nexthop; | |
2846 | struct route_table *table; | |
6e26278c | 2847 | struct prefix nh_p; |
718e3744 | 2848 | |
2849 | /* Lookup table. */ | |
2850 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2851 | if (! table) | |
2852 | return; | |
4d38fdb4 | 2853 | |
718e3744 | 2854 | /* Lookup existing route with type and distance. */ |
2855 | rn = route_node_lookup (table, p); | |
2856 | if (! rn) | |
2857 | return; | |
2858 | ||
9fd92e3c | 2859 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2860 | { |
2861 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2862 | continue; | |
2863 | ||
0d9551dc DS |
2864 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
2865 | rib->tag == si->tag) | |
6d691129 PJ |
2866 | break; |
2867 | } | |
718e3744 | 2868 | |
2869 | if (! rib) | |
2870 | { | |
2871 | route_unlock_node (rn); | |
2872 | return; | |
2873 | } | |
2874 | ||
2875 | /* Lookup nexthop. */ | |
2876 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2877 | if (static_ipv4_nexthop_same (nexthop, si)) | |
2878 | break; | |
2879 | ||
2880 | /* Can't find nexthop. */ | |
2881 | if (! nexthop) | |
2882 | { | |
2883 | route_unlock_node (rn); | |
2884 | return; | |
2885 | } | |
2886 | ||
2887 | /* Check nexthop. */ | |
2888 | if (rib->nexthop_num == 1) | |
6d691129 | 2889 | rib_delnode (rn, rib); |
718e3744 | 2890 | else |
2891 | { | |
94ad353d DS |
2892 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
2893 | * the nexthop. There is no need to re-evaluate the route for this | |
2894 | * scenario. | |
2895 | */ | |
2896 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 2897 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d DS |
2898 | { |
2899 | redistribute_delete (&rn->p, rib); | |
6ae24471 | 2900 | /* If there are other active nexthops, do an update. */ |
94ad353d DS |
2901 | if (rib->nexthop_active_num > 1) |
2902 | { | |
6ae24471 | 2903 | rib_install_kernel (rn, rib, 1); |
94ad353d DS |
2904 | redistribute_add (&rn->p, rib); |
2905 | } | |
6ae24471 DS |
2906 | else |
2907 | rib_uninstall_kernel (rn, rib); | |
94ad353d | 2908 | } |
6e26278c | 2909 | |
94ad353d | 2910 | /* Delete the nexthop and dereg from NHT */ |
6e26278c DS |
2911 | nh_p.family = AF_INET; |
2912 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2913 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
319572cc | 2914 | nexthop_delete (rib, nexthop); |
6e26278c DS |
2915 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
2916 | nexthop_free (nexthop, rn); | |
718e3744 | 2917 | } |
718e3744 | 2918 | /* Unlock node. */ |
2919 | route_unlock_node (rn); | |
2920 | } | |
2921 | ||
2922 | /* Add static route into static route configuration. */ | |
2923 | int | |
39db97e4 | 2924 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 2925 | u_char flags, u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 2926 | { |
2927 | u_char type = 0; | |
2928 | struct route_node *rn; | |
2929 | struct static_ipv4 *si; | |
2930 | struct static_ipv4 *pp; | |
2931 | struct static_ipv4 *cp; | |
2932 | struct static_ipv4 *update = NULL; | |
2933 | struct route_table *stable; | |
2934 | ||
2935 | /* Lookup table. */ | |
2936 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2937 | if (! stable) | |
2938 | return -1; | |
2939 | ||
2940 | /* Lookup static route prefix. */ | |
2941 | rn = route_node_get (stable, p); | |
2942 | ||
2943 | /* Make flags. */ | |
2944 | if (gate) | |
2945 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 2946 | else if (ifname) |
718e3744 | 2947 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 2948 | else |
2949 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2950 | |
2951 | /* Do nothing if there is a same static route. */ | |
2952 | for (si = rn->info; si; si = si->next) | |
2953 | { | |
2954 | if (type == si->type | |
2955 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2956 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2957 | { | |
0d9551dc | 2958 | if ((distance == si->distance) && (tag == si->tag)) |
718e3744 | 2959 | { |
2960 | route_unlock_node (rn); | |
2961 | return 0; | |
2962 | } | |
2963 | else | |
2964 | update = si; | |
2965 | } | |
2966 | } | |
2967 | ||
0d9551dc | 2968 | /* Distance or tag changed. */ |
718e3744 | 2969 | if (update) |
0d9551dc | 2970 | static_delete_ipv4 (p, gate, ifname, update->tag, update->distance, vrf_id); |
718e3744 | 2971 | |
2972 | /* Make new static route structure. */ | |
393deb9b | 2973 | si = XCALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
718e3744 | 2974 | |
2975 | si->type = type; | |
2976 | si->distance = distance; | |
81dfcaa2 | 2977 | si->flags = flags; |
0d9551dc | 2978 | si->tag = tag; |
718e3744 | 2979 | |
2980 | if (gate) | |
2981 | si->gate.ipv4 = *gate; | |
2982 | if (ifname) | |
2983 | si->gate.ifname = XSTRDUP (0, ifname); | |
2984 | ||
2985 | /* Add new static route information to the tree with sort by | |
2986 | distance value and gateway address. */ | |
2987 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2988 | { | |
2989 | if (si->distance < cp->distance) | |
2990 | break; | |
2991 | if (si->distance > cp->distance) | |
2992 | continue; | |
2993 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
2994 | { | |
2995 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
2996 | break; | |
2997 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
2998 | continue; | |
2999 | } | |
3000 | } | |
3001 | ||
3002 | /* Make linked list. */ | |
3003 | if (pp) | |
3004 | pp->next = si; | |
3005 | else | |
3006 | rn->info = si; | |
3007 | if (cp) | |
3008 | cp->prev = si; | |
3009 | si->prev = pp; | |
3010 | si->next = cp; | |
3011 | ||
3012 | /* Install into rib. */ | |
3013 | static_install_ipv4 (p, si); | |
3014 | ||
3015 | return 1; | |
3016 | } | |
3017 | ||
3018 | /* Delete static route from static route configuration. */ | |
3019 | int | |
39db97e4 | 3020 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 3021 | u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 3022 | { |
3023 | u_char type = 0; | |
3024 | struct route_node *rn; | |
3025 | struct static_ipv4 *si; | |
3026 | struct route_table *stable; | |
3027 | ||
3028 | /* Lookup table. */ | |
3029 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
3030 | if (! stable) | |
3031 | return -1; | |
3032 | ||
3033 | /* Lookup static route prefix. */ | |
3034 | rn = route_node_lookup (stable, p); | |
3035 | if (! rn) | |
3036 | return 0; | |
3037 | ||
3038 | /* Make flags. */ | |
3039 | if (gate) | |
3040 | type = STATIC_IPV4_GATEWAY; | |
3041 | else if (ifname) | |
3042 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 3043 | else |
3044 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 3045 | |
3046 | /* Find same static route is the tree */ | |
3047 | for (si = rn->info; si; si = si->next) | |
3048 | if (type == si->type | |
3049 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
0d9551dc DS |
3050 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0) |
3051 | && (! tag || (tag == si->tag))) | |
718e3744 | 3052 | break; |
3053 | ||
3054 | /* Can't find static route. */ | |
3055 | if (! si) | |
3056 | { | |
3057 | route_unlock_node (rn); | |
3058 | return 0; | |
3059 | } | |
3060 | ||
3061 | /* Install into rib. */ | |
3062 | static_uninstall_ipv4 (p, si); | |
3063 | ||
3064 | /* Unlink static route from linked list. */ | |
3065 | if (si->prev) | |
3066 | si->prev->next = si->next; | |
3067 | else | |
3068 | rn->info = si->next; | |
3069 | if (si->next) | |
3070 | si->next->prev = si->prev; | |
143a385f | 3071 | route_unlock_node (rn); |
718e3744 | 3072 | |
3073 | /* Free static route configuration. */ | |
a0f6acd8 | 3074 | if (ifname) |
3075 | XFREE (0, si->gate.ifname); | |
718e3744 | 3076 | XFREE (MTYPE_STATIC_IPV4, si); |
3077 | ||
143a385f | 3078 | route_unlock_node (rn); |
3079 | ||
718e3744 | 3080 | return 1; |
3081 | } | |
3082 | ||
6b0655a2 | 3083 | |
718e3744 | 3084 | #ifdef HAVE_IPV6 |
41fc2714 | 3085 | int |
718e3744 | 3086 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
3087 | struct in6_addr *gate, unsigned int ifindex, int table) | |
3088 | { | |
726f9b2b | 3089 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
3090 | #if defined (MUSICA) || defined (LINUX) | |
3091 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
3092 | if (p->prefixlen == 96) | |
3093 | return 0; | |
3094 | #endif /* MUSICA */ | |
718e3744 | 3095 | return 1; |
726f9b2b | 3096 | } |
718e3744 | 3097 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
3098 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
3099 | { | |
3100 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
3101 | return 1; | |
3102 | } | |
3103 | return 0; | |
3104 | } | |
3105 | ||
3106 | int | |
7c8ff89e | 3107 | rib_add_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3108 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, |
f768f367 | 3109 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 3110 | { |
3111 | struct rib *rib; | |
3112 | struct rib *same = NULL; | |
3113 | struct route_table *table; | |
3114 | struct route_node *rn; | |
3115 | struct nexthop *nexthop; | |
3116 | ||
718e3744 | 3117 | /* Lookup table. */ |
7a4bb9c5 DS |
3118 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3119 | { | |
3120 | table = vrf_table (AFI_IP6, safi, 0); | |
3121 | } | |
3122 | else | |
3123 | { | |
3124 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3125 | } | |
718e3744 | 3126 | if (! table) |
3127 | return 0; | |
3128 | ||
3129 | /* Make sure mask is applied. */ | |
3130 | apply_mask_ipv6 (p); | |
3131 | ||
3132 | /* Set default distance by route type. */ | |
be61c4eb | 3133 | if (!distance) |
3134 | distance = route_info[type].distance; | |
718e3744 | 3135 | |
3136 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
3137 | distance = 200; | |
3138 | ||
3139 | /* Filter bogus route. */ | |
3140 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
3141 | return 0; | |
3142 | ||
3143 | /* Lookup route node.*/ | |
3144 | rn = route_node_get (table, (struct prefix *) p); | |
3145 | ||
3146 | /* If same type of route are installed, treat it as a implicit | |
3147 | withdraw. */ | |
9fd92e3c | 3148 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3149 | { |
6d691129 PJ |
3150 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3151 | continue; | |
3152 | ||
ebf1ead0 | 3153 | if (rib->type != type) |
3154 | continue; | |
7c8ff89e DS |
3155 | if (rib->instance != instance) |
3156 | continue; | |
ebf1ead0 | 3157 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 3158 | { |
3159 | same = rib; | |
718e3744 | 3160 | break; |
3161 | } | |
ebf1ead0 | 3162 | else if ((nexthop = rib->nexthop) && |
3163 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3164 | nexthop->ifindex == ifindex) | |
3165 | { | |
3166 | rib->refcnt++; | |
3167 | return 0; | |
3168 | } | |
718e3744 | 3169 | } |
3170 | ||
3171 | /* Allocate new rib structure. */ | |
4d38fdb4 | 3172 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3173 | ||
718e3744 | 3174 | rib->type = type; |
7c8ff89e | 3175 | rib->instance = instance; |
718e3744 | 3176 | rib->distance = distance; |
3177 | rib->flags = flags; | |
3178 | rib->metric = metric; | |
7a4bb9c5 | 3179 | rib->table = table_id; |
718e3744 | 3180 | rib->nexthop_num = 0; |
3181 | rib->uptime = time (NULL); | |
3182 | ||
3183 | /* Nexthop settings. */ | |
3184 | if (gate) | |
3185 | { | |
3186 | if (ifindex) | |
3187 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
3188 | else | |
3189 | nexthop_ipv6_add (rib, gate); | |
3190 | } | |
3191 | else | |
3192 | nexthop_ifindex_add (rib, ifindex); | |
3193 | ||
3194 | /* If this route is kernel route, set FIB flag to the route. */ | |
3195 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
3196 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3197 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3198 | ||
3199 | /* Link new rib to node.*/ | |
3200 | rib_addnode (rn, rib); | |
fed643f4 VB |
3201 | if (IS_ZEBRA_DEBUG_RIB) |
3202 | { | |
3203 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
3204 | __func__, rn, rib); | |
f7bf4153 | 3205 | rib_dump (p, rib); |
fed643f4 | 3206 | } |
718e3744 | 3207 | |
718e3744 | 3208 | /* Free implicit route.*/ |
3209 | if (same) | |
fed643f4 VB |
3210 | { |
3211 | if (IS_ZEBRA_DEBUG_RIB) | |
3212 | { | |
3213 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3214 | __func__, rn, same); | |
f7bf4153 | 3215 | rib_dump (p, same); |
fed643f4 | 3216 | } |
4d38fdb4 | 3217 | rib_delnode (rn, same); |
fed643f4 | 3218 | } |
4d38fdb4 | 3219 | |
3220 | route_unlock_node (rn); | |
718e3744 | 3221 | return 0; |
3222 | } | |
3223 | ||
41fc2714 | 3224 | int |
8a92a8a0 | 3225 | rib_add_ipv6_multipath (struct prefix *p, struct rib *rib, safi_t safi, |
41fc2714 DS |
3226 | unsigned long ifindex) |
3227 | { | |
3228 | struct route_table *table; | |
3229 | struct route_node *rn; | |
3230 | struct rib *same = NULL; | |
3231 | struct nexthop *nexthop; | |
3232 | int ret = 0; | |
4e3afb14 | 3233 | unsigned int table_id = 0; |
41fc2714 | 3234 | |
8a92a8a0 | 3235 | if (p->family == AF_INET) |
7a4bb9c5 | 3236 | { |
8a92a8a0 DS |
3237 | if (!rib) |
3238 | return 0; | |
3239 | ||
3240 | table = vrf_table (AFI_IP, safi, 0); | |
3241 | if (!table) | |
3242 | return 0; | |
3243 | /* Make it sure prefixlen is applied to the prefix. */ | |
88177fe3 | 3244 | apply_mask_ipv4 ((struct prefix_ipv4 *)p); |
7a4bb9c5 DS |
3245 | } |
3246 | else | |
3247 | { | |
8a92a8a0 DS |
3248 | if (rib) |
3249 | table_id = rib->table; | |
3250 | else | |
3251 | return 0; /* why are we getting called with NULL rib */ | |
41fc2714 | 3252 | |
8a92a8a0 DS |
3253 | /* Lookup table. */ |
3254 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
3255 | { | |
3256 | table = vrf_table (AFI_IP6, safi, 0); | |
3257 | } | |
3258 | else | |
3259 | { | |
3260 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3261 | } | |
41fc2714 | 3262 | |
8a92a8a0 DS |
3263 | if (! table) |
3264 | return 0; | |
3265 | ||
3266 | /* Make sure mask is applied. */ | |
88177fe3 | 3267 | apply_mask_ipv6 ((struct prefix_ipv6 *)p); |
8a92a8a0 DS |
3268 | |
3269 | } | |
41fc2714 DS |
3270 | |
3271 | /* Set default distance by route type. */ | |
3272 | if (rib->distance == 0) | |
3273 | { | |
3274 | rib->distance = route_info[rib->type].distance; | |
3275 | ||
3276 | /* iBGP distance is 200. */ | |
3277 | if (rib->type == ZEBRA_ROUTE_BGP | |
3278 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
3279 | rib->distance = 200; | |
3280 | } | |
3281 | ||
3282 | /* Lookup route node.*/ | |
3283 | rn = route_node_get (table, (struct prefix *) p); | |
3284 | ||
3285 | /* If same type of route are installed, treat it as a implicit | |
3286 | withdraw. */ | |
3287 | RNODE_FOREACH_RIB (rn, same) { | |
3288 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
3289 | continue; | |
3290 | } | |
3291 | if (same->type != rib->type) { | |
3292 | continue; | |
3293 | } | |
3294 | ||
7c8ff89e DS |
3295 | if (same->instance != rib->instance) { |
3296 | continue; | |
3297 | } | |
3298 | ||
41fc2714 DS |
3299 | if (same->table != rib->table) { |
3300 | continue; | |
3301 | } | |
3302 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
3303 | break; | |
3304 | } | |
3305 | else if ((nexthop = same->nexthop) && | |
3306 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3307 | nexthop->ifindex == ifindex) { | |
3308 | same->refcnt++; | |
3309 | return 0; | |
3310 | } | |
3311 | } | |
3312 | ||
3313 | /* If this route is kernel route, set FIB flag to the route. */ | |
3314 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
3315 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
3316 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3317 | } | |
3318 | } | |
3319 | ||
3320 | /* Link new rib to node.*/ | |
3321 | rib_addnode (rn, rib); | |
3322 | ret = 1; | |
3323 | /* Free implicit route.*/ | |
3324 | if (same) | |
3325 | { | |
3326 | if (IS_ZEBRA_DEBUG_RIB) | |
3327 | { | |
3328 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3329 | __func__, rn, same); | |
3330 | rib_dump ((struct prefix *)p, same); | |
3331 | } | |
3332 | rib_delnode (rn, same); | |
3333 | ret = -1; | |
3334 | } | |
3335 | ||
3336 | route_unlock_node (rn); | |
3337 | return ret; | |
3338 | } | |
3339 | ||
ebf1ead0 | 3340 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 3341 | int |
7c8ff89e | 3342 | rib_delete_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3343 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, safi_t safi) |
718e3744 | 3344 | { |
3345 | struct route_table *table; | |
3346 | struct route_node *rn; | |
3347 | struct rib *rib; | |
3348 | struct rib *fib = NULL; | |
3349 | struct rib *same = NULL; | |
fa713d9e CF |
3350 | struct nexthop *nexthop, *tnexthop; |
3351 | int recursing; | |
81cce018 SH |
3352 | char buf1[INET6_ADDRSTRLEN]; |
3353 | char buf2[INET6_ADDRSTRLEN]; | |
718e3744 | 3354 | |
3355 | /* Apply mask. */ | |
3356 | apply_mask_ipv6 (p); | |
3357 | ||
3358 | /* Lookup table. */ | |
7a4bb9c5 DS |
3359 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3360 | { | |
3361 | table = vrf_table (AFI_IP6, safi, 0); | |
3362 | } | |
3363 | else | |
3364 | { | |
3365 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3366 | } | |
718e3744 | 3367 | if (! table) |
3368 | return 0; | |
4d38fdb4 | 3369 | |
718e3744 | 3370 | /* Lookup route node. */ |
3371 | rn = route_node_lookup (table, (struct prefix *) p); | |
3372 | if (! rn) | |
3373 | { | |
3374 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3375 | { | |
3376 | if (gate) | |
b6178002 | 3377 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 3378 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3379 | p->prefixlen, |
81cce018 | 3380 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3381 | ifindex); |
3382 | else | |
b6178002 | 3383 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 3384 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3385 | p->prefixlen, |
3386 | ifindex); | |
3387 | } | |
3388 | return ZEBRA_ERR_RTNOEXIST; | |
3389 | } | |
3390 | ||
3391 | /* Lookup same type route. */ | |
9fd92e3c | 3392 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3393 | { |
6d691129 PJ |
3394 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
3395 | continue; | |
3396 | ||
718e3744 | 3397 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3398 | fib = rib; | |
3399 | ||
ebf1ead0 | 3400 | if (rib->type != type) |
3401 | continue; | |
7c8ff89e DS |
3402 | if (rib->instance != instance) |
3403 | continue; | |
ebf1ead0 | 3404 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 3405 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 3406 | { |
4f1735fd MF |
3407 | if (nexthop->ifindex != ifindex) |
3408 | continue; | |
ebf1ead0 | 3409 | if (rib->refcnt) |
718e3744 | 3410 | { |
ebf1ead0 | 3411 | rib->refcnt--; |
3412 | route_unlock_node (rn); | |
3413 | route_unlock_node (rn); | |
3414 | return 0; | |
718e3744 | 3415 | } |
ebf1ead0 | 3416 | same = rib; |
3417 | break; | |
718e3744 | 3418 | } |
ebf1ead0 | 3419 | /* Make sure that the route found has the same gateway. */ |
fa713d9e CF |
3420 | else |
3421 | { | |
3422 | if (gate == NULL) | |
3423 | { | |
3424 | same = rib; | |
3425 | break; | |
3426 | } | |
3427 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
3428 | if (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
3429 | { | |
3430 | same = rib; | |
3431 | break; | |
3432 | } | |
3433 | if (same) | |
3434 | break; | |
3435 | } | |
718e3744 | 3436 | } |
3437 | ||
3438 | /* If same type of route can't be found and this message is from | |
3439 | kernel. */ | |
3440 | if (! same) | |
3441 | { | |
2037f143 DS |
3442 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
3443 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
3444 | { | |
3445 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3446 | { | |
3447 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
3448 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
3449 | p->prefixlen); | |
3450 | } | |
3451 | /* This means someone else, other than Zebra, has deleted a Zebra | |
3452 | * route from the kernel. We will add it back */ | |
6ae24471 | 3453 | rib_install_kernel(rn, fib, 0); |
2037f143 | 3454 | } |
718e3744 | 3455 | else |
3456 | { | |
3457 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3458 | { | |
3459 | if (gate) | |
b6178002 | 3460 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 3461 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3462 | p->prefixlen, |
81cce018 | 3463 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3464 | ifindex, |
3465 | type); | |
3466 | else | |
b6178002 | 3467 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 3468 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3469 | p->prefixlen, |
3470 | ifindex, | |
3471 | type); | |
3472 | } | |
3473 | route_unlock_node (rn); | |
3474 | return ZEBRA_ERR_RTNOEXIST; | |
3475 | } | |
3476 | } | |
3477 | ||
718e3744 | 3478 | if (same) |
4d38fdb4 | 3479 | rib_delnode (rn, same); |
3480 | ||
718e3744 | 3481 | route_unlock_node (rn); |
718e3744 | 3482 | return 0; |
3483 | } | |
6b0655a2 | 3484 | |
718e3744 | 3485 | /* Install static route into rib. */ |
a1ac18c4 | 3486 | static void |
718e3744 | 3487 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3488 | { | |
3489 | struct rib *rib; | |
3490 | struct route_table *table; | |
3491 | struct route_node *rn; | |
6e26278c | 3492 | struct prefix nh_p; |
718e3744 | 3493 | |
3494 | /* Lookup table. */ | |
3495 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3496 | if (! table) | |
3497 | return; | |
3498 | ||
3499 | /* Lookup existing route */ | |
3500 | rn = route_node_get (table, p); | |
9fd92e3c | 3501 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3502 | { |
3503 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) | |
3504 | continue; | |
3505 | ||
3506 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
3507 | break; | |
3508 | } | |
718e3744 | 3509 | |
3510 | if (rib) | |
3511 | { | |
0d9551dc DS |
3512 | /* if tag value changed , update old value in RIB */ |
3513 | if (rib->tag != si->tag) | |
3514 | rib->tag = si->tag; | |
3515 | ||
718e3744 | 3516 | /* Same distance static route is there. Update it with new |
3517 | nexthop. */ | |
718e3744 | 3518 | route_unlock_node (rn); |
3519 | ||
3520 | switch (si->type) | |
3521 | { | |
3522 | case STATIC_IPV6_GATEWAY: | |
3523 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3524 | nh_p.family = AF_INET6; |
3525 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3526 | nh_p.u.prefix6 = si->ipv6; | |
3527 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3528 | break; |
3529 | case STATIC_IPV6_IFNAME: | |
3530 | nexthop_ifname_add (rib, si->ifname); | |
3531 | break; | |
3532 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3533 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3534 | break; | |
3535 | } | |
3c0755dc | 3536 | rib_queue_add (&zebrad, rn); |
718e3744 | 3537 | } |
3538 | else | |
3539 | { | |
3540 | /* This is new static route. */ | |
4d38fdb4 | 3541 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3542 | ||
718e3744 | 3543 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 3544 | rib->instance = 0; |
718e3744 | 3545 | rib->distance = si->distance; |
3546 | rib->metric = 0; | |
4595531e | 3547 | rib->table = zebrad.rtm_table_default; |
718e3744 | 3548 | rib->nexthop_num = 0; |
0d9551dc | 3549 | rib->tag = si->tag; |
718e3744 | 3550 | |
3551 | switch (si->type) | |
3552 | { | |
3553 | case STATIC_IPV6_GATEWAY: | |
3554 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3555 | nh_p.family = AF_INET6; |
3556 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3557 | nh_p.u.prefix6 = si->ipv6; | |
3558 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3559 | break; |
3560 | case STATIC_IPV6_IFNAME: | |
3561 | nexthop_ifname_add (rib, si->ifname); | |
3562 | break; | |
3563 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3564 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3565 | break; | |
3566 | } | |
3567 | ||
81dfcaa2 | 3568 | /* Save the flags of this static routes (reject, blackhole) */ |
3569 | rib->flags = si->flags; | |
3570 | ||
718e3744 | 3571 | /* Link this rib to the tree. */ |
3572 | rib_addnode (rn, rib); | |
718e3744 | 3573 | } |
3574 | } | |
3575 | ||
a1ac18c4 | 3576 | static int |
718e3744 | 3577 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
3578 | { | |
3579 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
3580 | && si->type == STATIC_IPV6_GATEWAY | |
3581 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
3582 | return 1; | |
3583 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
3584 | && si->type == STATIC_IPV6_IFNAME | |
3585 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3586 | return 1; | |
3587 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
3588 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
3589 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
3590 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3591 | return 1; | |
e8e1946e | 3592 | return 0; |
718e3744 | 3593 | } |
3594 | ||
a1ac18c4 | 3595 | static void |
718e3744 | 3596 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3597 | { | |
3598 | struct route_table *table; | |
3599 | struct route_node *rn; | |
3600 | struct rib *rib; | |
3601 | struct nexthop *nexthop; | |
6e26278c | 3602 | struct prefix nh_p; |
718e3744 | 3603 | |
3604 | /* Lookup table. */ | |
3605 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3606 | if (! table) | |
3607 | return; | |
3608 | ||
3609 | /* Lookup existing route with type and distance. */ | |
3610 | rn = route_node_lookup (table, (struct prefix *) p); | |
3611 | if (! rn) | |
3612 | return; | |
3613 | ||
9fd92e3c | 3614 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3615 | { |
3616 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
3617 | continue; | |
3618 | ||
0d9551dc DS |
3619 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
3620 | rib->tag == si->tag) | |
6d691129 PJ |
3621 | break; |
3622 | } | |
3623 | ||
718e3744 | 3624 | if (! rib) |
3625 | { | |
3626 | route_unlock_node (rn); | |
3627 | return; | |
3628 | } | |
3629 | ||
3630 | /* Lookup nexthop. */ | |
3631 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3632 | if (static_ipv6_nexthop_same (nexthop, si)) | |
3633 | break; | |
3634 | ||
3635 | /* Can't find nexthop. */ | |
3636 | if (! nexthop) | |
3637 | { | |
3638 | route_unlock_node (rn); | |
3639 | return; | |
3640 | } | |
3641 | ||
3642 | /* Check nexthop. */ | |
3643 | if (rib->nexthop_num == 1) | |
3644 | { | |
3645 | rib_delnode (rn, rib); | |
718e3744 | 3646 | } |
3647 | else | |
3648 | { | |
94ad353d DS |
3649 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
3650 | * the nexthop. There is no need to re-evaluate the route for this | |
3651 | * scenario. | |
3652 | */ | |
3653 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
6baeb988 | 3654 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d DS |
3655 | { |
3656 | redistribute_delete (&rn->p, rib); | |
3657 | rib_uninstall_kernel (rn, rib); | |
3658 | /* Are there other active nexthops? */ | |
3659 | if (rib->nexthop_active_num > 1) | |
3660 | { | |
6ae24471 | 3661 | rib_install_kernel (rn, rib, 0); |
94ad353d DS |
3662 | redistribute_add (&rn->p, rib); |
3663 | } | |
3664 | } | |
6e26278c | 3665 | |
94ad353d | 3666 | /* Delete the nexthop and dereg from NHT */ |
6e26278c DS |
3667 | nh_p.family = AF_INET6; |
3668 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3669 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
319572cc | 3670 | nexthop_delete (rib, nexthop); |
6e26278c DS |
3671 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
3672 | nexthop_free (nexthop, rn); | |
718e3744 | 3673 | } |
718e3744 | 3674 | /* Unlock node. */ |
3675 | route_unlock_node (rn); | |
3676 | } | |
3677 | ||
3678 | /* Add static route into static route configuration. */ | |
3679 | int | |
3680 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3681 | const char *ifname, u_char flags, u_short tag, |
3682 | u_char distance, u_int32_t vrf_id) | |
718e3744 | 3683 | { |
3684 | struct route_node *rn; | |
3685 | struct static_ipv6 *si; | |
3686 | struct static_ipv6 *pp; | |
3687 | struct static_ipv6 *cp; | |
3688 | struct route_table *stable; | |
3689 | ||
3690 | /* Lookup table. */ | |
3691 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
3692 | if (! stable) | |
3693 | return -1; | |
27b47253 PJ |
3694 | |
3695 | if (!gate && | |
3696 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
3697 | return -1; | |
3698 | ||
3699 | if (!ifname && | |
3700 | (type == STATIC_IPV6_GATEWAY_IFNAME || type == STATIC_IPV6_IFNAME)) | |
3701 | return -1; | |
718e3744 | 3702 | |
3703 | /* Lookup static route prefix. */ | |
3704 | rn = route_node_get (stable, p); | |
3705 | ||
3706 | /* Do nothing if there is a same static route. */ | |
3707 | for (si = rn->info; si; si = si->next) | |
3708 | { | |
3709 | if (distance == si->distance | |
3710 | && type == si->type | |
0d9551dc | 3711 | && tag == si->tag |
718e3744 | 3712 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) |
3713 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
3714 | { | |
3715 | route_unlock_node (rn); | |
3716 | return 0; | |
3717 | } | |
3718 | } | |
3719 | ||
3720 | /* Make new static route structure. */ | |
393deb9b | 3721 | si = XCALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
718e3744 | 3722 | |
3723 | si->type = type; | |
3724 | si->distance = distance; | |
81dfcaa2 | 3725 | si->flags = flags; |
0d9551dc | 3726 | si->tag = tag; |
718e3744 | 3727 | |
3728 | switch (type) | |
3729 | { | |
3730 | case STATIC_IPV6_GATEWAY: | |
3731 | si->ipv6 = *gate; | |
3732 | break; | |
3733 | case STATIC_IPV6_IFNAME: | |
3734 | si->ifname = XSTRDUP (0, ifname); | |
3735 | break; | |
3736 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3737 | si->ipv6 = *gate; | |
3738 | si->ifname = XSTRDUP (0, ifname); | |
3739 | break; | |
3740 | } | |
3741 | ||
3742 | /* Add new static route information to the tree with sort by | |
3743 | distance value and gateway address. */ | |
3744 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3745 | { | |
3746 | if (si->distance < cp->distance) | |
3747 | break; | |
3748 | if (si->distance > cp->distance) | |
3749 | continue; | |
3750 | } | |
3751 | ||
3752 | /* Make linked list. */ | |
3753 | if (pp) | |
3754 | pp->next = si; | |
3755 | else | |
3756 | rn->info = si; | |
3757 | if (cp) | |
3758 | cp->prev = si; | |
3759 | si->prev = pp; | |
3760 | si->next = cp; | |
3761 | ||
3762 | /* Install into rib. */ | |
3763 | static_install_ipv6 (p, si); | |
3764 | ||
3765 | return 1; | |
3766 | } | |
3767 | ||
3768 | /* Delete static route from static route configuration. */ | |
3769 | int | |
3770 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3771 | const char *ifname, u_short tag, u_char distance, |
3772 | u_int32_t vrf_id) | |
718e3744 | 3773 | { |
3774 | struct route_node *rn; | |
3775 | struct static_ipv6 *si; | |
3776 | struct route_table *stable; | |
3777 | ||
3778 | /* Lookup table. */ | |
3779 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
3780 | if (! stable) | |
3781 | return -1; | |
3782 | ||
3783 | /* Lookup static route prefix. */ | |
3784 | rn = route_node_lookup (stable, p); | |
3785 | if (! rn) | |
3786 | return 0; | |
3787 | ||
3788 | /* Find same static route is the tree */ | |
3789 | for (si = rn->info; si; si = si->next) | |
3790 | if (distance == si->distance | |
3791 | && type == si->type | |
3792 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
0d9551dc DS |
3793 | && (! ifname || strcmp (ifname, si->ifname) == 0) |
3794 | && (! tag || (tag == si->tag))) | |
718e3744 | 3795 | break; |
3796 | ||
3797 | /* Can't find static route. */ | |
3798 | if (! si) | |
3799 | { | |
3800 | route_unlock_node (rn); | |
3801 | return 0; | |
3802 | } | |
3803 | ||
3804 | /* Install into rib. */ | |
3805 | static_uninstall_ipv6 (p, si); | |
3806 | ||
3807 | /* Unlink static route from linked list. */ | |
3808 | if (si->prev) | |
3809 | si->prev->next = si->next; | |
3810 | else | |
3811 | rn->info = si->next; | |
3812 | if (si->next) | |
3813 | si->next->prev = si->prev; | |
3814 | ||
3815 | /* Free static route configuration. */ | |
a0f6acd8 | 3816 | if (ifname) |
3817 | XFREE (0, si->ifname); | |
718e3744 | 3818 | XFREE (MTYPE_STATIC_IPV6, si); |
3819 | ||
3820 | return 1; | |
3821 | } | |
3822 | #endif /* HAVE_IPV6 */ | |
6b0655a2 | 3823 | |
718e3744 | 3824 | /* RIB update function. */ |
3825 | void | |
a1ac18c4 | 3826 | rib_update (void) |
718e3744 | 3827 | { |
3828 | struct route_node *rn; | |
3829 | struct route_table *table; | |
4d38fdb4 | 3830 | |
718e3744 | 3831 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
3832 | if (table) | |
3833 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3834 | if (rnode_to_ribs (rn)) |
6d691129 | 3835 | rib_queue_add (&zebrad, rn); |
718e3744 | 3836 | |
3837 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3838 | if (table) | |
3839 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3840 | if (rnode_to_ribs (rn)) |
6d691129 | 3841 | rib_queue_add (&zebrad, rn); |
718e3744 | 3842 | } |
3843 | ||
6b0655a2 | 3844 | |
718e3744 | 3845 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3846 | static void |
718e3744 | 3847 | rib_weed_table (struct route_table *table) |
3848 | { | |
3849 | struct route_node *rn; | |
3850 | struct rib *rib; | |
3851 | struct rib *next; | |
3852 | ||
3853 | if (table) | |
3854 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3855 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3856 | { |
6d691129 PJ |
3857 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3858 | continue; | |
3859 | ||
b21b19c5 | 3860 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3861 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3862 | rib_delnode (rn, rib); |
718e3744 | 3863 | } |
3864 | } | |
3865 | ||
3866 | /* Delete all routes from non main table. */ | |
3867 | void | |
a1ac18c4 | 3868 | rib_weed_tables (void) |
718e3744 | 3869 | { |
3870 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3871 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3872 | } | |
6b0655a2 | 3873 | |
718e3744 | 3874 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3875 | static void |
718e3744 | 3876 | rib_sweep_table (struct route_table *table) |
3877 | { | |
3878 | struct route_node *rn; | |
3879 | struct rib *rib; | |
3880 | struct rib *next; | |
3881 | int ret = 0; | |
3882 | ||
3883 | if (table) | |
3884 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3885 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3886 | { |
6d691129 PJ |
3887 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3888 | continue; | |
3889 | ||
718e3744 | 3890 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3891 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3892 | { | |
3893 | ret = rib_uninstall_kernel (rn, rib); | |
3894 | if (! ret) | |
4d38fdb4 | 3895 | rib_delnode (rn, rib); |
718e3744 | 3896 | } |
3897 | } | |
3898 | } | |
3899 | ||
3900 | /* Sweep all RIB tables. */ | |
3901 | void | |
a1ac18c4 | 3902 | rib_sweep_route (void) |
718e3744 | 3903 | { |
3904 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3905 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3906 | } | |
2ea1ab1c VT |
3907 | |
3908 | /* Remove specific by protocol routes from 'table'. */ | |
3909 | static unsigned long | |
7c8ff89e | 3910 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3911 | { |
3912 | struct route_node *rn; | |
3913 | struct rib *rib; | |
3914 | struct rib *next; | |
3915 | unsigned long n = 0; | |
3916 | ||
3917 | if (table) | |
3918 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3919 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3920 | { |
2ea1ab1c VT |
3921 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3922 | continue; | |
7c8ff89e | 3923 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3924 | { |
3925 | rib_delnode (rn, rib); | |
3926 | n++; | |
3927 | } | |
3928 | } | |
3929 | ||
3930 | return n; | |
3931 | } | |
3932 | ||
3933 | /* Remove specific by protocol routes. */ | |
3934 | unsigned long | |
7c8ff89e | 3935 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3936 | { |
7c8ff89e DS |
3937 | return rib_score_proto_table (proto, instance, vrf_table (AFI_IP, SAFI_UNICAST, 0)) |
3938 | +rib_score_proto_table (proto, instance, vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2ea1ab1c VT |
3939 | } |
3940 | ||
718e3744 | 3941 | /* Close RIB and clean up kernel routes. */ |
a1ac18c4 | 3942 | static void |
718e3744 | 3943 | rib_close_table (struct route_table *table) |
3944 | { | |
3945 | struct route_node *rn; | |
3946 | struct rib *rib; | |
3947 | ||
3948 | if (table) | |
3949 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3950 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3951 | { |
9fd92e3c AS |
3952 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3953 | continue; | |
3954 | ||
5adc2528 AS |
3955 | zfpm_trigger_update (rn, NULL); |
3956 | ||
9fd92e3c AS |
3957 | if (! RIB_SYSTEM_ROUTE (rib)) |
3958 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3959 | } |
718e3744 | 3960 | } |
3961 | ||
3962 | /* Close all RIB tables. */ | |
3963 | void | |
a1ac18c4 | 3964 | rib_close (void) |
718e3744 | 3965 | { |
5c610faf DS |
3966 | struct listnode *node, *nnode; |
3967 | struct interface *ifp; | |
3968 | ||
718e3744 | 3969 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); |
3970 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
5c610faf DS |
3971 | |
3972 | for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp)) | |
3973 | if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp); | |
718e3744 | 3974 | } |
6b0655a2 | 3975 | |
718e3744 | 3976 | /* Routing information base initialize. */ |
3977 | void | |
a1ac18c4 | 3978 | rib_init (void) |
718e3744 | 3979 | { |
4d38fdb4 | 3980 | rib_queue_init (&zebrad); |
718e3744 | 3981 | /* VRF initialization. */ |
3982 | vrf_init (); | |
3983 | } | |
0915bb0c AS |
3984 | |
3985 | /* | |
3986 | * vrf_id_get_next | |
3987 | * | |
3988 | * Get the first vrf id that is greater than the given vrf id if any. | |
3989 | * | |
3990 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3991 | */ | |
3992 | static inline int | |
3993 | vrf_id_get_next (uint32_t id, uint32_t *next_id_p) | |
3994 | { | |
3995 | while (++id < vector_active (vrf_vector)) | |
3996 | { | |
3997 | if (vrf_lookup (id)) | |
3998 | { | |
3999 | *next_id_p = id; | |
4000 | return 1; | |
4001 | } | |
4002 | } | |
4003 | ||
4004 | return 0; | |
4005 | } | |
4006 | ||
4007 | /* | |
4008 | * rib_tables_iter_next | |
4009 | * | |
4010 | * Returns the next table in the iteration. | |
4011 | */ | |
4012 | struct route_table * | |
4013 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
4014 | { | |
4015 | struct route_table *table; | |
4016 | ||
4017 | /* | |
4018 | * Array that helps us go over all AFI/SAFI combinations via one | |
4019 | * index. | |
4020 | */ | |
4021 | static struct { | |
4022 | afi_t afi; | |
4023 | safi_t safi; | |
4024 | } afi_safis[] = { | |
4025 | { AFI_IP, SAFI_UNICAST }, | |
4026 | { AFI_IP, SAFI_MULTICAST }, | |
4027 | { AFI_IP6, SAFI_UNICAST }, | |
4028 | { AFI_IP6, SAFI_MULTICAST }, | |
4029 | }; | |
4030 | ||
4031 | table = NULL; | |
4032 | ||
4033 | switch (iter->state) | |
4034 | { | |
4035 | ||
4036 | case RIB_TABLES_ITER_S_INIT: | |
4037 | iter->vrf_id = 0; | |
4038 | iter->afi_safi_ix = -1; | |
4039 | ||
4040 | /* Fall through */ | |
4041 | ||
4042 | case RIB_TABLES_ITER_S_ITERATING: | |
4043 | iter->afi_safi_ix++; | |
4044 | while (1) | |
4045 | { | |
4046 | ||
4047 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
4048 | { | |
4049 | table = vrf_table (afi_safis[iter->afi_safi_ix].afi, | |
4050 | afi_safis[iter->afi_safi_ix].safi, | |
4051 | iter->vrf_id); | |
4052 | if (table) | |
4053 | break; | |
4054 | ||
4055 | iter->afi_safi_ix++; | |
4056 | } | |
4057 | ||
4058 | /* | |
4059 | * Found another table in this vrf. | |
4060 | */ | |
4061 | if (table) | |
4062 | break; | |
4063 | ||
4064 | /* | |
4065 | * Done with all tables in the current vrf, go to the next | |
4066 | * one. | |
4067 | */ | |
4068 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
4069 | break; | |
4070 | ||
4071 | iter->afi_safi_ix = 0; | |
4072 | } | |
4073 | ||
4074 | break; | |
4075 | ||
4076 | case RIB_TABLES_ITER_S_DONE: | |
4077 | return NULL; | |
4078 | } | |
4079 | ||
4080 | if (table) | |
4081 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4082 | else | |
4083 | iter->state = RIB_TABLES_ITER_S_DONE; | |
4084 | ||
4085 | return table; | |
4086 | } |