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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "table.h" | |
26 | #include "memory.h" | |
27 | #include "str.h" | |
28 | #include "command.h" | |
29 | #include "if.h" | |
30 | #include "log.h" | |
31 | #include "sockunion.h" | |
4d38fdb4 | 32 | #include "linklist.h" |
33 | #include "thread.h" | |
34 | #include "workqueue.h" | |
7514fb77 PJ |
35 | #include "prefix.h" |
36 | #include "routemap.h" | |
fb018d25 | 37 | #include "nexthop.h" |
718e3744 | 38 | |
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/zserv.h" | |
42 | #include "zebra/redistribute.h" | |
43 | #include "zebra/debug.h" | |
5adc2528 | 44 | #include "zebra/zebra_fpm.h" |
fb018d25 | 45 | #include "zebra/zebra_rnh.h" |
718e3744 | 46 | |
47 | /* Default rtm_table for all clients */ | |
b21b19c5 | 48 | extern struct zebra_t zebrad; |
718e3744 | 49 | |
457eb9af PJ |
50 | /* Hold time for RIB process, should be very minimal. |
51 | * it is useful to able to set it otherwise for testing, hence exported | |
52 | * as global here for test-rig code. | |
53 | */ | |
54 | int rib_process_hold_time = 10; | |
55 | ||
718e3744 | 56 | /* Each route type's string and default distance value. */ |
d145bc00 | 57 | static const struct |
718e3744 | 58 | { |
59 | int key; | |
60 | int distance; | |
5734509c | 61 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 62 | { |
5734509c PJ |
63 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
64 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
65 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
66 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
67 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
68 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
69 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
70 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
71 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
72 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
73 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 95}, | |
7052f228 | 74 | /* no entry/default: 150 */ |
718e3744 | 75 | }; |
6b0655a2 | 76 | |
718e3744 | 77 | /* Vector for routing table. */ |
d145bc00 | 78 | static vector vrf_vector; |
718e3744 | 79 | |
1b5ed1b0 AS |
80 | /* |
81 | * vrf_table_create | |
82 | */ | |
83 | static void | |
84 | vrf_table_create (struct vrf *vrf, afi_t afi, safi_t safi) | |
85 | { | |
86 | rib_table_info_t *info; | |
87 | struct route_table *table; | |
88 | ||
89 | assert (!vrf->table[afi][safi]); | |
90 | ||
91 | table = route_table_init (); | |
92 | vrf->table[afi][safi] = table; | |
93 | ||
94 | info = XCALLOC (MTYPE_RIB_TABLE_INFO, sizeof (*info)); | |
95 | info->vrf = vrf; | |
96 | info->afi = afi; | |
97 | info->safi = safi; | |
98 | table->info = info; | |
99 | } | |
100 | ||
718e3744 | 101 | /* Allocate new VRF. */ |
a1ac18c4 | 102 | static struct vrf * |
fce954f8 | 103 | vrf_alloc (const char *name) |
718e3744 | 104 | { |
105 | struct vrf *vrf; | |
106 | ||
107 | vrf = XCALLOC (MTYPE_VRF, sizeof (struct vrf)); | |
108 | ||
109 | /* Put name. */ | |
110 | if (name) | |
111 | vrf->name = XSTRDUP (MTYPE_VRF_NAME, name); | |
112 | ||
113 | /* Allocate routing table and static table. */ | |
1b5ed1b0 AS |
114 | vrf_table_create (vrf, AFI_IP, SAFI_UNICAST); |
115 | vrf_table_create (vrf, AFI_IP6, SAFI_UNICAST); | |
718e3744 | 116 | vrf->stable[AFI_IP][SAFI_UNICAST] = route_table_init (); |
117 | vrf->stable[AFI_IP6][SAFI_UNICAST] = route_table_init (); | |
1b5ed1b0 AS |
118 | vrf_table_create (vrf, AFI_IP, SAFI_MULTICAST); |
119 | vrf_table_create (vrf, AFI_IP6, SAFI_MULTICAST); | |
cddf391b B |
120 | vrf->stable[AFI_IP][SAFI_MULTICAST] = route_table_init (); |
121 | vrf->stable[AFI_IP6][SAFI_MULTICAST] = route_table_init (); | |
122 | ||
fb018d25 DS |
123 | vrf->rnh_table[AFI_IP] = route_table_init(); |
124 | vrf->rnh_table[AFI_IP6] = route_table_init(); | |
718e3744 | 125 | |
078430f6 DS |
126 | vrf->import_check_table[AFI_IP] = route_table_init(); |
127 | vrf->import_check_table[AFI_IP6] = route_table_init(); | |
128 | ||
718e3744 | 129 | return vrf; |
130 | } | |
131 | ||
718e3744 | 132 | /* Lookup VRF by identifier. */ |
133 | struct vrf * | |
134 | vrf_lookup (u_int32_t id) | |
135 | { | |
136 | return vector_lookup (vrf_vector, id); | |
137 | } | |
138 | ||
718e3744 | 139 | /* Initialize VRF. */ |
a1ac18c4 | 140 | static void |
141 | vrf_init (void) | |
718e3744 | 142 | { |
143 | struct vrf *default_table; | |
144 | ||
145 | /* Allocate VRF vector. */ | |
146 | vrf_vector = vector_init (1); | |
147 | ||
148 | /* Allocate default main table. */ | |
149 | default_table = vrf_alloc ("Default-IP-Routing-Table"); | |
150 | ||
151 | /* Default table index must be 0. */ | |
152 | vector_set_index (vrf_vector, 0, default_table); | |
153 | } | |
154 | ||
155 | /* Lookup route table. */ | |
156 | struct route_table * | |
157 | vrf_table (afi_t afi, safi_t safi, u_int32_t id) | |
158 | { | |
159 | struct vrf *vrf; | |
160 | ||
161 | vrf = vrf_lookup (id); | |
162 | if (! vrf) | |
163 | return NULL; | |
164 | ||
9499bf2b LR |
165 | if( afi >= AFI_MAX || safi >= SAFI_MAX ) |
166 | return NULL; | |
167 | ||
718e3744 | 168 | return vrf->table[afi][safi]; |
169 | } | |
170 | ||
171 | /* Lookup static route table. */ | |
172 | struct route_table * | |
173 | vrf_static_table (afi_t afi, safi_t safi, u_int32_t id) | |
174 | { | |
175 | struct vrf *vrf; | |
176 | ||
177 | vrf = vrf_lookup (id); | |
178 | if (! vrf) | |
179 | return NULL; | |
180 | ||
9499bf2b LR |
181 | if( afi >= AFI_MAX || safi >= SAFI_MAX ) |
182 | return NULL; | |
183 | ||
718e3744 | 184 | return vrf->stable[afi][safi]; |
185 | } | |
6b0655a2 | 186 | |
7a4bb9c5 DS |
187 | struct route_table * |
188 | vrf_other_route_table (afi_t afi, u_int32_t table_id, u_int32_t vrf_id) | |
189 | { | |
190 | struct vrf *vrf; | |
191 | ||
192 | vrf = vrf_lookup (vrf_id); | |
193 | if (! vrf) | |
194 | return NULL; | |
195 | ||
196 | if(afi >= AFI_MAX) | |
197 | return NULL; | |
198 | ||
199 | if (table_id >= ZEBRA_KERNEL_TABLE_MAX) | |
200 | return NULL; | |
201 | ||
202 | if (vrf->other_table[afi][table_id] == NULL) | |
203 | { | |
204 | vrf->other_table[afi][table_id] = route_table_init(); | |
205 | } | |
206 | ||
207 | return (vrf->other_table[afi][table_id]); | |
208 | } | |
209 | ||
210 | int | |
211 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
212 | { | |
213 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX) || | |
214 | (table_id == RT_TABLE_UNSPEC) || | |
215 | (table_id == RT_TABLE_LOCAL) || | |
216 | (table_id == RT_TABLE_COMPAT)) | |
217 | return 0; | |
218 | else | |
219 | return 1; | |
220 | } | |
221 | ||
222 | int | |
223 | is_zebra_main_routing_table(u_int32_t table_id) | |
224 | { | |
225 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
226 | return 1; | |
227 | return 0; | |
228 | } | |
229 | ||
fa713d9e | 230 | /* Add nexthop to the end of a nexthop list. */ |
6e26278c | 231 | void |
fa713d9e | 232 | _nexthop_add (struct nexthop **target, struct nexthop *nexthop) |
718e3744 | 233 | { |
234 | struct nexthop *last; | |
235 | ||
fa713d9e | 236 | for (last = *target; last && last->next; last = last->next) |
718e3744 | 237 | ; |
238 | if (last) | |
239 | last->next = nexthop; | |
240 | else | |
fa713d9e | 241 | *target = nexthop; |
718e3744 | 242 | nexthop->prev = last; |
fa713d9e | 243 | } |
718e3744 | 244 | |
fa713d9e | 245 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 246 | void |
fa713d9e CF |
247 | nexthop_add (struct rib *rib, struct nexthop *nexthop) |
248 | { | |
249 | _nexthop_add(&rib->nexthop, nexthop); | |
718e3744 | 250 | rib->nexthop_num++; |
251 | } | |
252 | ||
6e26278c DS |
253 | static void |
254 | _copy_nexthops (struct nexthop **tnh, struct nexthop *nh) | |
255 | { | |
256 | struct nexthop *nexthop; | |
257 | struct nexthop *nh1; | |
258 | ||
259 | for (nh1 = nh; nh1; nh1 = nh1->next) | |
260 | { | |
261 | nexthop = nexthop_new(); | |
262 | nexthop->flags = nh->flags; | |
263 | nexthop->type = nh->type; | |
264 | nexthop->ifindex = nh->ifindex; | |
265 | if (nh->ifname) | |
266 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
267 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
268 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
269 | _nexthop_add(tnh, nexthop); | |
270 | ||
271 | if (CHECK_FLAG(nh1->flags, NEXTHOP_FLAG_RECURSIVE)) | |
272 | _copy_nexthops(&nexthop->resolved, nh1->resolved); | |
273 | } | |
274 | } | |
275 | ||
276 | /** | |
277 | * copy_nexthop - copy a nexthop to the rib structure. | |
278 | */ | |
279 | void | |
280 | copy_nexthops (struct rib *rib, struct nexthop *nh) | |
281 | { | |
282 | struct nexthop *nexthop; | |
283 | ||
284 | nexthop = nexthop_new(); | |
285 | nexthop->flags = nh->flags; | |
286 | nexthop->type = nh->type; | |
287 | nexthop->ifindex = nh->ifindex; | |
288 | if (nh->ifname) | |
289 | nexthop->ifname = XSTRDUP(0, nh->ifname); | |
290 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); | |
291 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
292 | nexthop_add(rib, nexthop); | |
293 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) | |
294 | _copy_nexthops(&nexthop->resolved, nh->resolved); | |
295 | } | |
296 | ||
718e3744 | 297 | /* Delete specified nexthop from the list. */ |
a1ac18c4 | 298 | static void |
718e3744 | 299 | nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
300 | { | |
301 | if (nexthop->next) | |
302 | nexthop->next->prev = nexthop->prev; | |
303 | if (nexthop->prev) | |
304 | nexthop->prev->next = nexthop->next; | |
305 | else | |
306 | rib->nexthop = nexthop->next; | |
307 | rib->nexthop_num--; | |
308 | } | |
309 | ||
310 | /* Free nexthop. */ | |
fb018d25 | 311 | void |
6e26278c | 312 | nexthop_free (struct nexthop *nexthop, struct route_node *rn) |
718e3744 | 313 | { |
a4b70768 | 314 | if (nexthop->ifname) |
315 | XFREE (0, nexthop->ifname); | |
fa713d9e | 316 | if (nexthop->resolved) |
6e26278c | 317 | nexthops_free(nexthop->resolved, rn); |
718e3744 | 318 | XFREE (MTYPE_NEXTHOP, nexthop); |
319 | } | |
320 | ||
fa713d9e | 321 | /* Frees a list of nexthops */ |
fb018d25 | 322 | void |
6e26278c | 323 | nexthops_free (struct nexthop *nexthop, struct route_node *rn) |
fa713d9e CF |
324 | { |
325 | struct nexthop *nh, *next; | |
6e26278c | 326 | struct prefix nh_p; |
fa713d9e CF |
327 | |
328 | for (nh = nexthop; nh; nh = next) | |
329 | { | |
330 | next = nh->next; | |
6e26278c DS |
331 | if (nh->type == NEXTHOP_TYPE_IPV4) |
332 | { | |
333 | nh_p.family = AF_INET; | |
334 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
335 | nh_p.u.prefix4 = nh->gate.ipv4; | |
70c0f184 | 336 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c DS |
337 | } |
338 | else if (nh->type == NEXTHOP_TYPE_IPV6) | |
339 | { | |
340 | nh_p.family = AF_INET6; | |
341 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
342 | nh_p.u.prefix6 = nh->gate.ipv6; | |
70c0f184 | 343 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
6e26278c | 344 | } |
6e26278c | 345 | nexthop_free (nh, rn); |
fa713d9e CF |
346 | } |
347 | } | |
348 | ||
718e3744 | 349 | struct nexthop * |
350 | nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) | |
351 | { | |
352 | struct nexthop *nexthop; | |
353 | ||
393deb9b | 354 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 355 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
356 | nexthop->ifindex = ifindex; | |
357 | ||
358 | nexthop_add (rib, nexthop); | |
359 | ||
360 | return nexthop; | |
361 | } | |
362 | ||
363 | struct nexthop * | |
364 | nexthop_ifname_add (struct rib *rib, char *ifname) | |
365 | { | |
366 | struct nexthop *nexthop; | |
367 | ||
393deb9b | 368 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 369 | nexthop->type = NEXTHOP_TYPE_IFNAME; |
a4b70768 | 370 | nexthop->ifname = XSTRDUP (0, ifname); |
718e3744 | 371 | |
372 | nexthop_add (rib, nexthop); | |
373 | ||
374 | return nexthop; | |
375 | } | |
376 | ||
377 | struct nexthop * | |
7514fb77 | 378 | nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 379 | { |
380 | struct nexthop *nexthop; | |
381 | ||
393deb9b | 382 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 383 | nexthop->type = NEXTHOP_TYPE_IPV4; |
384 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
385 | if (src) |
386 | nexthop->src.ipv4 = *src; | |
718e3744 | 387 | |
388 | nexthop_add (rib, nexthop); | |
389 | ||
390 | return nexthop; | |
391 | } | |
392 | ||
26e2ae36 | 393 | struct nexthop * |
718e3744 | 394 | nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
7514fb77 | 395 | struct in_addr *src, unsigned int ifindex) |
718e3744 | 396 | { |
397 | struct nexthop *nexthop; | |
398 | ||
393deb9b | 399 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 400 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
401 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
402 | if (src) |
403 | nexthop->src.ipv4 = *src; | |
718e3744 | 404 | nexthop->ifindex = ifindex; |
405 | ||
406 | nexthop_add (rib, nexthop); | |
407 | ||
408 | return nexthop; | |
409 | } | |
410 | ||
c8a1cb5c DS |
411 | struct nexthop * |
412 | nexthop_ipv4_ifindex_ol_add (struct rib *rib, const struct in_addr *ipv4, | |
413 | const struct in_addr *src, const unsigned int ifindex) | |
414 | { | |
415 | struct nexthop *nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
416 | ||
417 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
418 | IPV4_ADDR_COPY (&nexthop->gate.ipv4, ipv4); | |
419 | if (src) | |
420 | IPV4_ADDR_COPY (&nexthop->src.ipv4, src); | |
421 | nexthop->ifindex = ifindex; | |
422 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
423 | nexthop_add (rib, nexthop); | |
424 | return nexthop; | |
425 | } | |
426 | ||
718e3744 | 427 | #ifdef HAVE_IPV6 |
428 | struct nexthop * | |
429 | nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) | |
430 | { | |
431 | struct nexthop *nexthop; | |
432 | ||
393deb9b | 433 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 434 | nexthop->type = NEXTHOP_TYPE_IPV6; |
435 | nexthop->gate.ipv6 = *ipv6; | |
436 | ||
437 | nexthop_add (rib, nexthop); | |
438 | ||
439 | return nexthop; | |
440 | } | |
441 | ||
41fc2714 | 442 | struct nexthop * |
718e3744 | 443 | nexthop_ipv6_ifname_add (struct rib *rib, struct in6_addr *ipv6, |
444 | char *ifname) | |
445 | { | |
446 | struct nexthop *nexthop; | |
447 | ||
393deb9b | 448 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 449 | nexthop->type = NEXTHOP_TYPE_IPV6_IFNAME; |
450 | nexthop->gate.ipv6 = *ipv6; | |
451 | nexthop->ifname = XSTRDUP (0, ifname); | |
452 | ||
453 | nexthop_add (rib, nexthop); | |
454 | ||
455 | return nexthop; | |
456 | } | |
457 | ||
41fc2714 | 458 | struct nexthop * |
718e3744 | 459 | nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
460 | unsigned int ifindex) | |
461 | { | |
462 | struct nexthop *nexthop; | |
463 | ||
393deb9b | 464 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 465 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
466 | nexthop->gate.ipv6 = *ipv6; | |
467 | nexthop->ifindex = ifindex; | |
468 | ||
469 | nexthop_add (rib, nexthop); | |
470 | ||
471 | return nexthop; | |
472 | } | |
473 | #endif /* HAVE_IPV6 */ | |
474 | ||
595db7f1 | 475 | struct nexthop * |
476 | nexthop_blackhole_add (struct rib *rib) | |
477 | { | |
478 | struct nexthop *nexthop; | |
479 | ||
393deb9b | 480 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
595db7f1 | 481 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
482 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
483 | ||
484 | nexthop_add (rib, nexthop); | |
485 | ||
486 | return nexthop; | |
487 | } | |
488 | ||
fa713d9e CF |
489 | /* This method checks whether a recursive nexthop has at |
490 | * least one resolved nexthop in the fib. | |
491 | */ | |
492 | int | |
493 | nexthop_has_fib_child(struct nexthop *nexthop) | |
494 | { | |
495 | struct nexthop *nh; | |
496 | ||
497 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
498 | return 0; | |
499 | ||
500 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
501 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
502 | return 1; | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
718e3744 | 507 | /* If force flag is not set, do not modify falgs at all for uninstall |
508 | the route from FIB. */ | |
a1ac18c4 | 509 | static int |
718e3744 | 510 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
511 | struct route_node *top) | |
512 | { | |
513 | struct prefix_ipv4 p; | |
514 | struct route_table *table; | |
515 | struct route_node *rn; | |
516 | struct rib *match; | |
fa713d9e | 517 | int resolved; |
6e26278c | 518 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 519 | struct nexthop *resolved_hop; |
6e26278c | 520 | int recursing = 0; |
c8a1cb5c | 521 | struct interface *ifp; |
718e3744 | 522 | |
523 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
524 | nexthop->ifindex = 0; | |
525 | ||
526 | if (set) | |
fa713d9e CF |
527 | { |
528 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 529 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
530 | nexthop->resolved = NULL; |
531 | } | |
718e3744 | 532 | |
6e26278c DS |
533 | /* Skip nexthops that have been filtered out due to route-map */ |
534 | /* The nexthops are specific to this route and so the same */ | |
535 | /* nexthop for a different route may not have this flag set */ | |
536 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
537 | return 0; | |
538 | ||
c8a1cb5c DS |
539 | /* onlink flag is an indication that we need to only check that |
540 | * the link is up, we won't find the GW address in the routing | |
541 | * table. | |
542 | */ | |
543 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
544 | { | |
545 | ifp = if_lookup_by_index (nexthop->ifindex); | |
546 | if (ifp && if_is_operative(ifp)) | |
547 | return 1; | |
548 | else | |
549 | return 0; | |
550 | } | |
551 | ||
718e3744 | 552 | /* Make lookup prefix. */ |
553 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
554 | p.family = AF_INET; | |
555 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
556 | p.prefix = nexthop->gate.ipv4; | |
557 | ||
558 | /* Lookup table. */ | |
559 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
560 | if (! table) | |
561 | return 0; | |
562 | ||
563 | rn = route_node_match (table, (struct prefix *) &p); | |
564 | while (rn) | |
565 | { | |
566 | route_unlock_node (rn); | |
567 | ||
a50c107e | 568 | /* If lookup self prefix return immediately. */ |
718e3744 | 569 | if (rn == top) |
570 | return 0; | |
571 | ||
572 | /* Pick up selected route. */ | |
9fd92e3c | 573 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
574 | { |
575 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
576 | continue; | |
577 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
578 | break; | |
579 | } | |
718e3744 | 580 | |
581 | /* If there is no selected route or matched route is EGP, go up | |
582 | tree. */ | |
6e26278c | 583 | if (! match) |
718e3744 | 584 | { |
585 | do { | |
586 | rn = rn->parent; | |
587 | } while (rn && rn->info == NULL); | |
588 | if (rn) | |
589 | route_lock_node (rn); | |
590 | } | |
591 | else | |
592 | { | |
48a53dc7 CF |
593 | /* If the longest prefix match for the nexthop yields |
594 | * a blackhole, mark it as inactive. */ | |
595 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
596 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
597 | return 0; | |
598 | ||
718e3744 | 599 | if (match->type == ZEBRA_ROUTE_CONNECT) |
600 | { | |
601 | /* Directly point connected route. */ | |
602 | newhop = match->nexthop; | |
603 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
604 | nexthop->ifindex = newhop->ifindex; | |
605 | ||
606 | return 1; | |
607 | } | |
608 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
609 | { | |
fa713d9e | 610 | resolved = 0; |
718e3744 | 611 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
612 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
613 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
614 | { | |
615 | if (set) | |
616 | { | |
617 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 618 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
619 | |
620 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
621 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
622 | /* If the resolving route specifies a gateway, use it */ |
623 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
624 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
625 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
626 | { | |
627 | resolved_hop->type = newhop->type; | |
628 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
629 | ||
630 | if (newhop->ifindex) | |
631 | { | |
632 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
633 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
634 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
635 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
636 | } |
637 | } | |
638 | ||
639 | /* If the resolving route is an interface route, | |
640 | * it means the gateway we are looking up is connected | |
641 | * to that interface. (The actual network is _not_ onlink). | |
642 | * Therefore, the resolved route should have the original | |
643 | * gateway as nexthop as it is directly connected. | |
644 | * | |
645 | * On Linux, we have to set the onlink netlink flag because | |
646 | * otherwise, the kernel won't accept the route. */ | |
718e3744 | 647 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
648 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
649 | { | |
650 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
651 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
652 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
653 | resolved_hop->ifindex = newhop->ifindex; | |
654 | } | |
fa713d9e | 655 | |
6e26278c DS |
656 | _nexthop_add(&nexthop->resolved, resolved_hop); |
657 | } | |
658 | resolved = 1; | |
659 | } | |
660 | return resolved; | |
661 | } | |
662 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
663 | { | |
664 | resolved = 0; | |
665 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
666 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
667 | { | |
668 | if (set) | |
669 | { | |
670 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
671 | ||
672 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
673 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
674 | /* If the resolving route specifies a gateway, use it */ | |
675 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
676 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
677 | || newhop->type == NEXTHOP_TYPE_IPV4_IFNAME) | |
678 | { | |
679 | resolved_hop->type = newhop->type; | |
680 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
681 | ||
682 | if (newhop->ifindex) | |
683 | { | |
684 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
685 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
686 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
687 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
688 | } |
689 | } | |
690 | ||
691 | /* If the resolving route is an interface route, | |
692 | * it means the gateway we are looking up is connected | |
693 | * to that interface. (The actual network is _not_ onlink). | |
694 | * Therefore, the resolved route should have the original | |
695 | * gateway as nexthop as it is directly connected. | |
696 | * | |
697 | * On Linux, we have to set the onlink netlink flag because | |
698 | * otherwise, the kernel won't accept the route. | |
699 | */ | |
700 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
701 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
702 | { | |
703 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
704 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
705 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
706 | resolved_hop->ifindex = newhop->ifindex; | |
707 | } | |
708 | ||
fa713d9e | 709 | _nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 710 | } |
fa713d9e | 711 | resolved = 1; |
718e3744 | 712 | } |
fa713d9e | 713 | return resolved; |
718e3744 | 714 | } |
715 | else | |
716 | { | |
717 | return 0; | |
718 | } | |
719 | } | |
720 | } | |
721 | return 0; | |
722 | } | |
723 | ||
724 | #ifdef HAVE_IPV6 | |
725 | /* If force flag is not set, do not modify falgs at all for uninstall | |
726 | the route from FIB. */ | |
a1ac18c4 | 727 | static int |
718e3744 | 728 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
729 | struct route_node *top) | |
730 | { | |
731 | struct prefix_ipv6 p; | |
732 | struct route_table *table; | |
733 | struct route_node *rn; | |
734 | struct rib *match; | |
fa713d9e | 735 | int resolved; |
6e26278c DS |
736 | struct nexthop *newhop, *tnewhop; |
737 | int recursing = 0; | |
fa713d9e | 738 | struct nexthop *resolved_hop; |
718e3744 | 739 | |
740 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
741 | nexthop->ifindex = 0; | |
742 | ||
743 | if (set) | |
fa713d9e CF |
744 | { |
745 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 746 | nexthops_free(nexthop->resolved, top); |
fa713d9e CF |
747 | nexthop->resolved = NULL; |
748 | } | |
718e3744 | 749 | |
6e26278c DS |
750 | /* Skip nexthops that have been filtered out due to route-map */ |
751 | /* The nexthops are specific to this route and so the same */ | |
752 | /* nexthop for a different route may not have this flag set */ | |
753 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
754 | return 0; | |
755 | ||
718e3744 | 756 | /* Make lookup prefix. */ |
757 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
758 | p.family = AF_INET6; | |
759 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
760 | p.prefix = nexthop->gate.ipv6; | |
761 | ||
762 | /* Lookup table. */ | |
763 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
764 | if (! table) | |
765 | return 0; | |
766 | ||
767 | rn = route_node_match (table, (struct prefix *) &p); | |
768 | while (rn) | |
769 | { | |
770 | route_unlock_node (rn); | |
771 | ||
a50c107e | 772 | /* If lookup self prefix return immediately. */ |
718e3744 | 773 | if (rn == top) |
774 | return 0; | |
775 | ||
776 | /* Pick up selected route. */ | |
9fd92e3c | 777 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
778 | { |
779 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
780 | continue; | |
781 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
782 | break; | |
783 | } | |
718e3744 | 784 | |
785 | /* If there is no selected route or matched route is EGP, go up | |
786 | tree. */ | |
6e26278c | 787 | if (! match) |
718e3744 | 788 | { |
789 | do { | |
790 | rn = rn->parent; | |
791 | } while (rn && rn->info == NULL); | |
792 | if (rn) | |
793 | route_lock_node (rn); | |
794 | } | |
795 | else | |
796 | { | |
48a53dc7 CF |
797 | /* If the longest prefix match for the nexthop yields |
798 | * a blackhole, mark it as inactive. */ | |
799 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
800 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
801 | return 0; | |
802 | ||
718e3744 | 803 | if (match->type == ZEBRA_ROUTE_CONNECT) |
804 | { | |
805 | /* Directly point connected route. */ | |
806 | newhop = match->nexthop; | |
807 | ||
808 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
809 | nexthop->ifindex = newhop->ifindex; | |
810 | ||
811 | return 1; | |
812 | } | |
813 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
814 | { | |
fa713d9e | 815 | resolved = 0; |
718e3744 | 816 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
817 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
818 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
819 | { |
820 | if (set) | |
821 | { | |
822 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
823 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
824 | ||
825 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
826 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
827 | /* See nexthop_active_ipv4 for a description how the | |
828 | * resolved nexthop is constructed. */ | |
829 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
830 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
831 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
832 | { | |
833 | resolved_hop->type = newhop->type; | |
834 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
835 | ||
836 | if (newhop->ifindex) | |
837 | { | |
838 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
839 | resolved_hop->ifindex = newhop->ifindex; | |
840 | } | |
841 | } | |
842 | ||
843 | if (newhop->type == NEXTHOP_TYPE_IFINDEX | |
844 | || newhop->type == NEXTHOP_TYPE_IFNAME) | |
845 | { | |
846 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
847 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
848 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
849 | resolved_hop->ifindex = newhop->ifindex; | |
850 | } | |
851 | ||
852 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
853 | } | |
854 | resolved = 1; | |
855 | } | |
856 | return resolved; | |
857 | } | |
858 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
859 | { | |
860 | resolved = 0; | |
861 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
862 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 863 | { |
864 | if (set) | |
865 | { | |
866 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
867 | |
868 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
869 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
870 | /* See nexthop_active_ipv4 for a description how the |
871 | * resolved nexthop is constructed. */ | |
718e3744 | 872 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
873 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
874 | || newhop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
c3e6b595 CF |
875 | { |
876 | resolved_hop->type = newhop->type; | |
877 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
878 | ||
879 | if (newhop->ifindex) | |
880 | { | |
881 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
882 | resolved_hop->ifindex = newhop->ifindex; | |
883 | } | |
884 | } | |
fa713d9e | 885 | |
718e3744 | 886 | if (newhop->type == NEXTHOP_TYPE_IFINDEX |
c3e6b595 CF |
887 | || newhop->type == NEXTHOP_TYPE_IFNAME) |
888 | { | |
889 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
890 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
891 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
892 | resolved_hop->ifindex = newhop->ifindex; | |
893 | } | |
fa713d9e CF |
894 | |
895 | _nexthop_add(&nexthop->resolved, resolved_hop); | |
718e3744 | 896 | } |
fa713d9e | 897 | resolved = 1; |
718e3744 | 898 | } |
fa713d9e | 899 | return resolved; |
718e3744 | 900 | } |
901 | else | |
902 | { | |
903 | return 0; | |
904 | } | |
905 | } | |
906 | } | |
907 | return 0; | |
908 | } | |
909 | #endif /* HAVE_IPV6 */ | |
910 | ||
911 | struct rib * | |
912 | rib_match_ipv4 (struct in_addr addr) | |
913 | { | |
914 | struct prefix_ipv4 p; | |
915 | struct route_table *table; | |
916 | struct route_node *rn; | |
917 | struct rib *match; | |
fa713d9e CF |
918 | struct nexthop *newhop, *tnewhop; |
919 | int recursing; | |
718e3744 | 920 | |
921 | /* Lookup table. */ | |
922 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
923 | if (! table) | |
924 | return 0; | |
925 | ||
926 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
927 | p.family = AF_INET; | |
928 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
929 | p.prefix = addr; | |
930 | ||
931 | rn = route_node_match (table, (struct prefix *) &p); | |
932 | ||
933 | while (rn) | |
934 | { | |
935 | route_unlock_node (rn); | |
936 | ||
937 | /* Pick up selected route. */ | |
9fd92e3c | 938 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
939 | { |
940 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
941 | continue; | |
942 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
943 | break; | |
944 | } | |
718e3744 | 945 | |
946 | /* If there is no selected route or matched route is EGP, go up | |
947 | tree. */ | |
6e26278c | 948 | if (! match) |
718e3744 | 949 | { |
950 | do { | |
951 | rn = rn->parent; | |
952 | } while (rn && rn->info == NULL); | |
953 | if (rn) | |
954 | route_lock_node (rn); | |
955 | } | |
956 | else | |
957 | { | |
958 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
959 | /* Directly point connected route. */ | |
960 | return match; | |
961 | else | |
962 | { | |
fa713d9e | 963 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 964 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
965 | return match; | |
966 | return NULL; | |
967 | } | |
968 | } | |
969 | } | |
970 | return NULL; | |
971 | } | |
972 | ||
973 | struct rib * | |
974 | rib_lookup_ipv4 (struct prefix_ipv4 *p) | |
975 | { | |
976 | struct route_table *table; | |
977 | struct route_node *rn; | |
978 | struct rib *match; | |
fa713d9e CF |
979 | struct nexthop *nexthop, *tnexthop; |
980 | int recursing; | |
718e3744 | 981 | |
982 | /* Lookup table. */ | |
983 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
984 | if (! table) | |
985 | return 0; | |
986 | ||
987 | rn = route_node_lookup (table, (struct prefix *) p); | |
988 | ||
989 | /* No route for this prefix. */ | |
990 | if (! rn) | |
991 | return NULL; | |
992 | ||
993 | /* Unlock node. */ | |
994 | route_unlock_node (rn); | |
995 | ||
9fd92e3c | 996 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
997 | { |
998 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
999 | continue; | |
1000 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1001 | break; | |
1002 | } | |
718e3744 | 1003 | |
6e26278c | 1004 | if (! match) |
718e3744 | 1005 | return NULL; |
1006 | ||
1007 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1008 | return match; | |
1009 | ||
fa713d9e | 1010 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1011 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1012 | return match; | |
1013 | ||
1014 | return NULL; | |
1015 | } | |
1016 | ||
dc95824a DO |
1017 | /* |
1018 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
1019 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
1020 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
1021 | * | |
1022 | * Return values: | |
1023 | * -1: error | |
1024 | * 0: exact match found | |
1025 | * 1: a match was found with a different gate | |
1026 | * 2: connected route found | |
1027 | * 3: no matches found | |
1028 | */ | |
1029 | int | |
1030 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate) | |
1031 | { | |
1032 | struct route_table *table; | |
1033 | struct route_node *rn; | |
1034 | struct rib *match; | |
fa713d9e CF |
1035 | struct nexthop *nexthop, *tnexthop; |
1036 | int recursing; | |
1037 | int nexthops_active; | |
dc95824a DO |
1038 | |
1039 | /* Lookup table. */ | |
1040 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
1041 | if (! table) | |
1042 | return ZEBRA_RIB_LOOKUP_ERROR; | |
1043 | ||
1044 | /* Scan the RIB table for exactly matching RIB entry. */ | |
1045 | rn = route_node_lookup (table, (struct prefix *) p); | |
1046 | ||
1047 | /* No route for this prefix. */ | |
1048 | if (! rn) | |
1049 | return ZEBRA_RIB_NOTFOUND; | |
1050 | ||
1051 | /* Unlock node. */ | |
1052 | route_unlock_node (rn); | |
1053 | ||
1054 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 1055 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1056 | { |
1057 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1058 | continue; | |
1059 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1060 | break; | |
1061 | } | |
dc95824a DO |
1062 | |
1063 | /* None such found :( */ | |
1064 | if (!match) | |
1065 | return ZEBRA_RIB_NOTFOUND; | |
1066 | ||
1067 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1068 | return ZEBRA_RIB_FOUND_CONNECTED; | |
1069 | ||
1070 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
1071 | nexthops_active = 0; |
1072 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 1073 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 1074 | { |
fa713d9e CF |
1075 | nexthops_active = 1; |
1076 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
1077 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 1078 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
1079 | { |
1080 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
1081 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
1082 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
1083 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
1084 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1085 | } | |
dc95824a | 1086 | } |
fa713d9e CF |
1087 | |
1088 | if (nexthops_active) | |
1089 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1090 | |
1091 | return ZEBRA_RIB_NOTFOUND; | |
1092 | } | |
1093 | ||
718e3744 | 1094 | #ifdef HAVE_IPV6 |
1095 | struct rib * | |
1096 | rib_match_ipv6 (struct in6_addr *addr) | |
1097 | { | |
1098 | struct prefix_ipv6 p; | |
1099 | struct route_table *table; | |
1100 | struct route_node *rn; | |
1101 | struct rib *match; | |
fa713d9e CF |
1102 | struct nexthop *newhop, *tnewhop; |
1103 | int recursing; | |
718e3744 | 1104 | |
1105 | /* Lookup table. */ | |
1106 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
1107 | if (! table) | |
1108 | return 0; | |
1109 | ||
1110 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
1111 | p.family = AF_INET6; | |
1112 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1113 | IPV6_ADDR_COPY (&p.prefix, addr); | |
1114 | ||
1115 | rn = route_node_match (table, (struct prefix *) &p); | |
1116 | ||
1117 | while (rn) | |
1118 | { | |
1119 | route_unlock_node (rn); | |
1120 | ||
1121 | /* Pick up selected route. */ | |
9fd92e3c | 1122 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1123 | { |
1124 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1125 | continue; | |
1126 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1127 | break; | |
1128 | } | |
718e3744 | 1129 | |
1130 | /* If there is no selected route or matched route is EGP, go up | |
1131 | tree. */ | |
6e26278c | 1132 | if (! match) |
718e3744 | 1133 | { |
1134 | do { | |
1135 | rn = rn->parent; | |
1136 | } while (rn && rn->info == NULL); | |
1137 | if (rn) | |
1138 | route_lock_node (rn); | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1143 | /* Directly point connected route. */ | |
1144 | return match; | |
1145 | else | |
1146 | { | |
fa713d9e | 1147 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 1148 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
1149 | return match; | |
1150 | return NULL; | |
1151 | } | |
1152 | } | |
1153 | } | |
1154 | return NULL; | |
1155 | } | |
1156 | #endif /* HAVE_IPV6 */ | |
1157 | ||
7514fb77 PJ |
1158 | #define RIB_SYSTEM_ROUTE(R) \ |
1159 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1160 | ||
dc95824a DO |
1161 | /* This function verifies reachability of one given nexthop, which can be |
1162 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1163 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1164 | * nexthop->ifindex will be updated appropriately as well. | |
1165 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1166 | * not vice versa. | |
1167 | * | |
1168 | * The return value is the final value of 'ACTIVE' flag. | |
1169 | */ | |
1170 | ||
d02c56cd | 1171 | static unsigned |
718e3744 | 1172 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1173 | struct nexthop *nexthop, int set) | |
1174 | { | |
f3a1732e | 1175 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1176 | struct interface *ifp; |
7514fb77 | 1177 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1178 | int family; |
518f0eb1 | 1179 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1180 | |
7a4bb9c5 DS |
1181 | if (rn->p.family == AF_INET) |
1182 | family = AFI_IP; | |
1183 | else if (rn->p.family == AF_INET6) | |
1184 | family = AFI_IP6; | |
1185 | else | |
1186 | family = 0; | |
718e3744 | 1187 | switch (nexthop->type) |
1188 | { | |
1189 | case NEXTHOP_TYPE_IFINDEX: | |
1190 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1191 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1192 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1193 | else | |
1194 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1195 | break; | |
718e3744 | 1196 | case NEXTHOP_TYPE_IPV6_IFNAME: |
7514fb77 PJ |
1197 | family = AFI_IP6; |
1198 | case NEXTHOP_TYPE_IFNAME: | |
718e3744 | 1199 | ifp = if_lookup_by_name (nexthop->ifname); |
3f087670 | 1200 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1201 | { |
1202 | if (set) | |
1203 | nexthop->ifindex = ifp->ifindex; | |
1204 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1205 | } | |
1206 | else | |
1207 | { | |
1208 | if (set) | |
1209 | nexthop->ifindex = 0; | |
1210 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1211 | } | |
1212 | break; | |
1213 | case NEXTHOP_TYPE_IPV4: | |
1214 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1215 | family = AFI_IP; |
718e3744 | 1216 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1217 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1218 | else | |
1219 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1220 | break; | |
1221 | #ifdef HAVE_IPV6 | |
1222 | case NEXTHOP_TYPE_IPV6: | |
7514fb77 | 1223 | family = AFI_IP6; |
718e3744 | 1224 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1225 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1226 | else | |
1227 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1228 | break; | |
1229 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
7514fb77 | 1230 | family = AFI_IP6; |
718e3744 | 1231 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1232 | { | |
1233 | ifp = if_lookup_by_index (nexthop->ifindex); | |
3f087670 | 1234 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1235 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1236 | else | |
1237 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1242 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1243 | else | |
1244 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1245 | } | |
1246 | break; | |
1247 | #endif /* HAVE_IPV6 */ | |
595db7f1 | 1248 | case NEXTHOP_TYPE_BLACKHOLE: |
1249 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1250 | break; | |
718e3744 | 1251 | default: |
1252 | break; | |
1253 | } | |
7514fb77 PJ |
1254 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1255 | return 0; | |
1256 | ||
f3a1732e CF |
1257 | /* XXX: What exactly do those checks do? Do we support |
1258 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1259 | if (RIB_SYSTEM_ROUTE(rib) || |
1260 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1261 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1262 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1263 | ||
f3a1732e CF |
1264 | /* The original code didn't determine the family correctly |
1265 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1266 | * from the rib_table_info in those cases. | |
1267 | * Possibly it may be better to use only the rib_table_info | |
1268 | * in every case. | |
1269 | */ | |
1270 | if (!family) | |
1271 | family = info->afi; | |
1272 | ||
c52ef59f | 1273 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1274 | |
ca84c8ef DS |
1275 | /* It'll get set if required inside */ |
1276 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->tag); | |
7514fb77 | 1277 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1278 | { |
1279 | if (IS_ZEBRA_DEBUG_RIB) | |
1280 | { | |
1281 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1282 | zlog_debug("%s: Filtering out %s with NH out %s due to route map", | |
1283 | __FUNCTION__, buf, nexthop->ifname); | |
1284 | } | |
1285 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1286 | } | |
c52ef59f | 1287 | |
718e3744 | 1288 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1289 | } | |
1290 | ||
03e232a4 DO |
1291 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1292 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1293 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
1294 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
1295 | * transparently passed to nexthop_active_check(). | |
1296 | * | |
1297 | * Return value is the new number of active nexthops. | |
1298 | */ | |
1299 | ||
a1ac18c4 | 1300 | static int |
718e3744 | 1301 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1302 | { | |
1303 | struct nexthop *nexthop; | |
c52ef59f | 1304 | union g_addr prev_src; |
6e26278c DS |
1305 | unsigned int prev_active, prev_index, new_active, old_num_nh; |
1306 | ||
1307 | old_num_nh = rib->nexthop_active_num; | |
718e3744 | 1308 | |
1309 | rib->nexthop_active_num = 0; | |
1310 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1311 | ||
1312 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1313 | { |
c52ef59f DS |
1314 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1315 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1316 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1317 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1318 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1319 | rib->nexthop_active_num++; | |
c52ef59f | 1320 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1321 | if (prev_active != new_active || |
c52ef59f DS |
1322 | prev_index != nexthop->ifindex || |
1323 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1324 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
1325 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr)) | |
6e26278c DS |
1326 | { |
1327 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1328 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1329 | } | |
03e232a4 | 1330 | } |
6e26278c DS |
1331 | |
1332 | if (old_num_nh != rib->nexthop_active_num) | |
1333 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1334 | ||
1335 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_CHANGED)) | |
1336 | { | |
1337 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1338 | } | |
1339 | ||
718e3744 | 1340 | return rib->nexthop_active_num; |
1341 | } | |
6baeb988 | 1342 | |
6b0655a2 | 1343 | |
718e3744 | 1344 | |
a1ac18c4 | 1345 | static void |
718e3744 | 1346 | rib_install_kernel (struct route_node *rn, struct rib *rib) |
1347 | { | |
1348 | int ret = 0; | |
fa713d9e CF |
1349 | struct nexthop *nexthop, *tnexthop; |
1350 | int recursing; | |
718e3744 | 1351 | |
5adc2528 AS |
1352 | /* |
1353 | * Make sure we update the FPM any time we send new information to | |
1354 | * the kernel. | |
1355 | */ | |
1356 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1357 | switch (PREFIX_FAMILY (&rn->p)) |
1358 | { | |
1359 | case AF_INET: | |
1360 | ret = kernel_add_ipv4 (&rn->p, rib); | |
1361 | break; | |
1362 | #ifdef HAVE_IPV6 | |
1363 | case AF_INET6: | |
1364 | ret = kernel_add_ipv6 (&rn->p, rib); | |
1365 | break; | |
1366 | #endif /* HAVE_IPV6 */ | |
1367 | } | |
1368 | ||
dc95824a | 1369 | /* This condition is never met, if we are using rt_socket.c */ |
718e3744 | 1370 | if (ret < 0) |
1371 | { | |
fa713d9e | 1372 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1373 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1374 | } | |
1375 | } | |
1376 | ||
1377 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1378 | static int |
718e3744 | 1379 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1380 | { | |
1381 | int ret = 0; | |
fa713d9e CF |
1382 | struct nexthop *nexthop, *tnexthop; |
1383 | int recursing; | |
718e3744 | 1384 | |
5adc2528 AS |
1385 | /* |
1386 | * Make sure we update the FPM any time we send new information to | |
1387 | * the kernel. | |
1388 | */ | |
1389 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1390 | ||
718e3744 | 1391 | switch (PREFIX_FAMILY (&rn->p)) |
1392 | { | |
1393 | case AF_INET: | |
1394 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1395 | break; | |
1396 | #ifdef HAVE_IPV6 | |
1397 | case AF_INET6: | |
1398 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1399 | break; | |
1400 | #endif /* HAVE_IPV6 */ | |
1401 | } | |
1402 | ||
fa713d9e | 1403 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1404 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1405 | ||
1406 | return ret; | |
1407 | } | |
1408 | ||
1409 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1410 | static void |
718e3744 | 1411 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1412 | { | |
1413 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1414 | { | |
5adc2528 AS |
1415 | zfpm_trigger_update (rn, "rib_uninstall"); |
1416 | ||
718e3744 | 1417 | redistribute_delete (&rn->p, rib); |
1418 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1419 | rib_uninstall_kernel (rn, rib); | |
1420 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1421 | } | |
1422 | } | |
1423 | ||
6d691129 PJ |
1424 | static void rib_unlink (struct route_node *, struct rib *); |
1425 | ||
9fd92e3c AS |
1426 | /* |
1427 | * rib_can_delete_dest | |
1428 | * | |
1429 | * Returns TRUE if the given dest can be deleted from the table. | |
1430 | */ | |
1431 | static int | |
1432 | rib_can_delete_dest (rib_dest_t *dest) | |
1433 | { | |
1434 | if (dest->routes) | |
1435 | { | |
1436 | return 0; | |
1437 | } | |
1438 | ||
5adc2528 AS |
1439 | /* |
1440 | * Don't delete the dest if we have to update the FPM about this | |
1441 | * prefix. | |
1442 | */ | |
1443 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1444 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1445 | return 0; | |
1446 | ||
9fd92e3c AS |
1447 | return 1; |
1448 | } | |
1449 | ||
1450 | /* | |
1451 | * rib_gc_dest | |
1452 | * | |
1453 | * Garbage collect the rib dest corresponding to the given route node | |
1454 | * if appropriate. | |
1455 | * | |
1456 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1457 | */ | |
1458 | int | |
1459 | rib_gc_dest (struct route_node *rn) | |
1460 | { | |
1461 | rib_dest_t *dest; | |
1462 | char buf[INET6_ADDRSTRLEN]; | |
1463 | ||
1464 | dest = rib_dest_from_rnode (rn); | |
1465 | if (!dest) | |
1466 | return 0; | |
1467 | ||
1468 | if (!rib_can_delete_dest (dest)) | |
1469 | return 0; | |
1470 | ||
1471 | if (IS_ZEBRA_DEBUG_RIB) | |
1472 | { | |
1473 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
1474 | zlog_debug ("%s: %s/%d: removing dest from table", __func__, | |
1475 | buf, rn->p.prefixlen); | |
1476 | } | |
1477 | ||
1478 | dest->rnode = NULL; | |
1479 | XFREE (MTYPE_RIB_DEST, dest); | |
1480 | rn->info = NULL; | |
1481 | ||
1482 | /* | |
1483 | * Release the one reference that we keep on the route node. | |
1484 | */ | |
1485 | route_unlock_node (rn); | |
1486 | return 1; | |
1487 | } | |
1488 | ||
718e3744 | 1489 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1490 | static void |
1491 | rib_process (struct route_node *rn) | |
718e3744 | 1492 | { |
1493 | struct rib *rib; | |
1494 | struct rib *next; | |
1495 | struct rib *fib = NULL; | |
1496 | struct rib *select = NULL; | |
6d691129 | 1497 | struct rib *del = NULL; |
d753e9ee | 1498 | int installed = 0; |
fa713d9e CF |
1499 | struct nexthop *nexthop = NULL, *tnexthop; |
1500 | int recursing; | |
f304cb48 | 1501 | char buf[INET6_ADDRSTRLEN]; |
4d38fdb4 | 1502 | |
1503 | assert (rn); | |
1504 | ||
93bdadae | 1505 | if (IS_ZEBRA_DEBUG_RIB || IS_ZEBRA_DEBUG_RIB_Q) |
f304cb48 | 1506 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1507 | |
9fd92e3c | 1508 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1509 | { |
6e26278c DS |
1510 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1511 | ||
718e3744 | 1512 | /* Currently installed rib. */ |
1513 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1514 | { |
1515 | assert (fib == NULL); | |
1516 | fib = rib; | |
1517 | } | |
ca657c65 | 1518 | |
6d691129 PJ |
1519 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1520 | * which we need to do do further work with below. | |
1521 | */ | |
1522 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1523 | { | |
1524 | if (rib != fib) | |
1525 | { | |
1526 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1527 | zlog_debug ("%s: %s/%d: rn %p, removing rib %p", __func__, |
1528 | buf, rn->p.prefixlen, rn, rib); | |
9fd92e3c | 1529 | rib_unlink (rn, rib); |
6d691129 PJ |
1530 | } |
1531 | else | |
1532 | del = rib; | |
1533 | ||
1534 | continue; | |
1535 | } | |
4d38fdb4 | 1536 | |
718e3744 | 1537 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1538 | /* This first call to nexthop_active_update is merely to determine if |
1539 | * there's any change to nexthops associated with this RIB entry. Now, | |
1540 | * rib_process() can be invoked due to an external event such as link | |
1541 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1542 | * a decision has already been made that the NHs have changed. So, no | |
1543 | * need to invoke a potentially expensive call again. Further, since | |
1544 | * the change might be in a recursive NH which is not caught in | |
1545 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1546 | * recursive NHs. | |
6e26278c | 1547 | */ |
ca657c65 | 1548 | if (!CHECK_FLAG(rib->flags, ZEBRA_FLAG_CHANGED) && |
6e26278c | 1549 | ! nexthop_active_update (rn, rib, 0)) |
7021c425 | 1550 | continue; |
718e3744 | 1551 | |
1552 | /* Infinit distance. */ | |
1553 | if (rib->distance == DISTANCE_INFINITY) | |
7021c425 | 1554 | continue; |
718e3744 | 1555 | |
af887b51 | 1556 | /* Newly selected rib, the common case. */ |
1557 | if (!select) | |
1558 | { | |
1559 | select = rib; | |
1560 | continue; | |
1561 | } | |
1562 | ||
1563 | /* filter route selection in following order: | |
af887b51 | 1564 | * - connected beats other types |
a8d9c1f9 | 1565 | * - lower distance beats higher |
af887b51 | 1566 | * - lower metric beats higher for equal distance |
1567 | * - last, hence oldest, route wins tie break. | |
1568 | */ | |
a1038a15 | 1569 | |
1570 | /* Connected routes. Pick the last connected | |
1571 | * route of the set of lowest metric connected routes. | |
1572 | */ | |
a8d9c1f9 | 1573 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1574 | { | |
a1038a15 | 1575 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1576 | || rib->metric <= select->metric) |
a1038a15 | 1577 | select = rib; |
1578 | continue; | |
a8d9c1f9 | 1579 | } |
1580 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
1581 | continue; | |
1582 | ||
1583 | /* higher distance loses */ | |
1584 | if (rib->distance > select->distance) | |
1585 | continue; | |
1586 | ||
1587 | /* lower wins */ | |
1588 | if (rib->distance < select->distance) | |
1589 | { | |
af887b51 | 1590 | select = rib; |
a8d9c1f9 | 1591 | continue; |
1592 | } | |
1593 | ||
1594 | /* metric tie-breaks equal distance */ | |
1595 | if (rib->metric <= select->metric) | |
1596 | select = rib; | |
9fd92e3c | 1597 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1598 | |
1599 | /* After the cycle is finished, the following pointers will be set: | |
1600 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1601 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1602 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1603 | * rib --- NULL | |
1604 | */ | |
1605 | ||
1606 | /* Same RIB entry is selected. Update FIB and finish. */ | |
718e3744 | 1607 | if (select && select == fib) |
1608 | { | |
6d691129 | 1609 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1610 | zlog_debug ("%s: %s/%d: Updating existing route, select %p, fib %p", |
1611 | __func__, buf, rn->p.prefixlen, select, fib); | |
718e3744 | 1612 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1613 | { |
5adc2528 AS |
1614 | zfpm_trigger_update (rn, "updating existing route"); |
1615 | ||
4d38fdb4 | 1616 | redistribute_delete (&rn->p, select); |
1617 | if (! RIB_SYSTEM_ROUTE (select)) | |
1618 | rib_uninstall_kernel (rn, select); | |
718e3744 | 1619 | |
4d38fdb4 | 1620 | /* Set real nexthop. */ |
6e26278c DS |
1621 | /* Need to check if any NHs are active to clear the |
1622 | * the selected flag | |
1623 | */ | |
1624 | if (nexthop_active_update (rn, select, 1)) | |
1625 | { | |
1626 | if (! RIB_SYSTEM_ROUTE (select)) | |
1627 | rib_install_kernel (rn, select); | |
1628 | redistribute_add (&rn->p, select); | |
1629 | } | |
1630 | else | |
1631 | { | |
1632 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1633 | } | |
ca657c65 | 1634 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
6e26278c | 1635 | } |
d753e9ee | 1636 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1637 | { |
1638 | /* Housekeeping code to deal with | |
1639 | race conditions in kernel with linux | |
1640 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1641 | is ready to add routes. | |
1642 | This makes sure the routes are IN the kernel. | |
1643 | */ | |
1644 | ||
fa713d9e | 1645 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1646 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1647 | { |
a3aaf5b0 DO |
1648 | installed = 1; |
1649 | break; | |
4d38fdb4 | 1650 | } |
1651 | if (! installed) | |
1652 | rib_install_kernel (rn, select); | |
1653 | } | |
6d691129 | 1654 | goto end; |
718e3744 | 1655 | } |
1656 | ||
dc95824a DO |
1657 | /* At this point we either haven't found the best RIB entry or it is |
1658 | * different from what we currently intend to flag with SELECTED. In both | |
1659 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1660 | */ | |
718e3744 | 1661 | if (fib) |
1662 | { | |
6d691129 | 1663 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1664 | zlog_debug ("%s: %s/%d: Removing existing route, fib %p", __func__, |
1665 | buf, rn->p.prefixlen, fib); | |
5adc2528 AS |
1666 | |
1667 | zfpm_trigger_update (rn, "removing existing route"); | |
1668 | ||
718e3744 | 1669 | redistribute_delete (&rn->p, fib); |
1670 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1671 | rib_uninstall_kernel (rn, fib); | |
1672 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1673 | ||
1674 | /* Set real nexthop. */ | |
1675 | nexthop_active_update (rn, fib, 1); | |
ca657c65 | 1676 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1677 | } |
1678 | ||
dc95824a DO |
1679 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1680 | * tell, that if a new winner exists, FIB is still not updated with this | |
1681 | * data, but ready to be. | |
1682 | */ | |
718e3744 | 1683 | if (select) |
1684 | { | |
6d691129 | 1685 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae PJ |
1686 | zlog_debug ("%s: %s/%d: Adding route, select %p", __func__, buf, |
1687 | rn->p.prefixlen, select); | |
5adc2528 AS |
1688 | |
1689 | zfpm_trigger_update (rn, "new route selected"); | |
1690 | ||
718e3744 | 1691 | /* Set real nexthop. */ |
6e26278c DS |
1692 | if (nexthop_active_update (rn, select, 1)) |
1693 | { | |
1694 | if (! RIB_SYSTEM_ROUTE (select)) | |
1695 | rib_install_kernel (rn, select); | |
1696 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1697 | redistribute_add (&rn->p, select); | |
1698 | } | |
ca657c65 | 1699 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1700 | } |
4d38fdb4 | 1701 | |
6d691129 PJ |
1702 | /* FIB route was removed, should be deleted */ |
1703 | if (del) | |
1704 | { | |
1705 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae PJ |
1706 | zlog_debug ("%s: %s/%d: Deleting fib %p, rn %p", __func__, buf, |
1707 | rn->p.prefixlen, del, rn); | |
6d691129 PJ |
1708 | rib_unlink (rn, del); |
1709 | } | |
4d38fdb4 | 1710 | |
6d691129 PJ |
1711 | end: |
1712 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
93bdadae | 1713 | zlog_debug ("%s: %s/%d: rn %p dequeued", __func__, buf, rn->p.prefixlen, rn); |
9fd92e3c AS |
1714 | |
1715 | /* | |
1716 | * Check if the dest can be deleted now. | |
1717 | */ | |
1718 | rib_gc_dest (rn); | |
e96f9203 DO |
1719 | } |
1720 | ||
5110a0c6 SH |
1721 | /* Take a list of route_node structs and return 1, if there was a record |
1722 | * picked from it and processed by rib_process(). Don't process more, | |
1723 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1724 | */ |
ef9b113e | 1725 | static unsigned int |
e96f9203 DO |
1726 | process_subq (struct list * subq, u_char qindex) |
1727 | { | |
5110a0c6 | 1728 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1729 | struct route_node *rnode; |
5110a0c6 SH |
1730 | |
1731 | if (!lnode) | |
e96f9203 | 1732 | return 0; |
5110a0c6 | 1733 | |
e96f9203 DO |
1734 | rnode = listgetdata (lnode); |
1735 | rib_process (rnode); | |
5110a0c6 | 1736 | |
9fd92e3c AS |
1737 | if (rnode->info) |
1738 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1739 | ||
67b9467f | 1740 | #if 0 |
5110a0c6 SH |
1741 | else |
1742 | { | |
1743 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1744 | __func__, rnode, rnode->lock); | |
1745 | zlog_backtrace(LOG_DEBUG); | |
1746 | } | |
67b9467f | 1747 | #endif |
e96f9203 DO |
1748 | route_unlock_node (rnode); |
1749 | list_delete_node (subq, lnode); | |
1750 | return 1; | |
1751 | } | |
1752 | ||
fb018d25 DS |
1753 | /* |
1754 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1755 | */ | |
1756 | static void | |
1757 | meta_queue_process_complete (struct work_queue *dummy) | |
1758 | { | |
078430f6 DS |
1759 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
1760 | zebra_evaluate_rnh(0, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 | 1761 | #ifdef HAVE_IPV6 |
078430f6 DS |
1762 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); |
1763 | zebra_evaluate_rnh(0, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
fb018d25 DS |
1764 | #endif /* HAVE_IPV6 */ |
1765 | } | |
1766 | ||
e96f9203 DO |
1767 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1768 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1769 | * is pointed to the meta queue structure. | |
1770 | */ | |
1771 | static wq_item_status | |
1772 | meta_queue_process (struct work_queue *dummy, void *data) | |
1773 | { | |
1774 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1775 | unsigned i; |
1776 | ||
e96f9203 DO |
1777 | for (i = 0; i < MQ_SIZE; i++) |
1778 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1779 | { |
1780 | mq->size--; | |
1781 | break; | |
1782 | } | |
e96f9203 DO |
1783 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1784 | } | |
1785 | ||
9fd92e3c AS |
1786 | /* |
1787 | * Map from rib types to queue type (priority) in meta queue | |
1788 | */ | |
5110a0c6 SH |
1789 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1790 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1791 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1792 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1793 | [ZEBRA_ROUTE_STATIC] = 1, | |
1794 | [ZEBRA_ROUTE_RIP] = 2, | |
1795 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1796 | [ZEBRA_ROUTE_OSPF] = 2, | |
1797 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1798 | [ZEBRA_ROUTE_ISIS] = 2, | |
1799 | [ZEBRA_ROUTE_BGP] = 3, | |
1800 | [ZEBRA_ROUTE_HSLS] = 4, | |
5734509c | 1801 | [ZEBRA_ROUTE_BABEL] = 2, |
7a4bb9c5 | 1802 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
1803 | }; |
1804 | ||
1805 | /* Look into the RN and queue it into one or more priority queues, | |
1806 | * increasing the size for each data push done. | |
e96f9203 | 1807 | */ |
ef9b113e SH |
1808 | static void |
1809 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1810 | { |
e96f9203 DO |
1811 | struct rib *rib; |
1812 | char buf[INET6_ADDRSTRLEN]; | |
5110a0c6 | 1813 | |
e96f9203 DO |
1814 | if (IS_ZEBRA_DEBUG_RIB_Q) |
1815 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
5110a0c6 | 1816 | |
9fd92e3c | 1817 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1818 | { |
5110a0c6 SH |
1819 | u_char qindex = meta_queue_map[rib->type]; |
1820 | ||
1821 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1822 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1823 | RIB_ROUTE_QUEUED (qindex))) | |
5110a0c6 SH |
1824 | { |
1825 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1826 | zlog_debug ("%s: %s/%d: rn %p is already queued in sub-queue %u", | |
1827 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
1828 | continue; | |
1829 | } | |
1830 | ||
9fd92e3c | 1831 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1832 | listnode_add (mq->subq[qindex], rn); |
1833 | route_lock_node (rn); | |
1834 | mq->size++; | |
1835 | ||
e96f9203 | 1836 | if (IS_ZEBRA_DEBUG_RIB_Q) |
5110a0c6 SH |
1837 | zlog_debug ("%s: %s/%d: queued rn %p into sub-queue %u", |
1838 | __func__, buf, rn->p.prefixlen, rn, qindex); | |
e96f9203 | 1839 | } |
4d38fdb4 | 1840 | } |
1841 | ||
6d691129 | 1842 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 1843 | void |
6d691129 | 1844 | rib_queue_add (struct zebra_t *zebra, struct route_node *rn) |
4d38fdb4 | 1845 | { |
fc328ac9 SV |
1846 | char buf[INET_ADDRSTRLEN]; |
1847 | assert (zebra && rn); | |
4d38fdb4 | 1848 | |
93bdadae | 1849 | if (IS_ZEBRA_DEBUG_RIB_Q) |
fc328ac9 SV |
1850 | inet_ntop (AF_INET, &rn->p.u.prefix, buf, INET_ADDRSTRLEN); |
1851 | ||
1852 | /* Pointless to queue a route_node with no RIB entries to add or remove */ | |
9fd92e3c | 1853 | if (!rnode_to_ribs (rn)) |
6d691129 | 1854 | { |
fc328ac9 SV |
1855 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
1856 | __func__, rn, rn->lock); | |
1857 | zlog_backtrace(LOG_DEBUG); | |
1858 | return; | |
1859 | } | |
1860 | ||
1861 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1862 | zlog_info ("%s: %s/%d: work queue added", __func__, buf, rn->p.prefixlen); | |
1863 | ||
1864 | assert (zebra); | |
4d38fdb4 | 1865 | |
fc328ac9 SV |
1866 | if (zebra->ribq == NULL) |
1867 | { | |
1868 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1869 | return; | |
4d38fdb4 | 1870 | } |
4d38fdb4 | 1871 | |
cc2dd928 SH |
1872 | /* |
1873 | * The RIB queue should normally be either empty or holding the only | |
1874 | * work_queue_item element. In the latter case this element would | |
1875 | * hold a pointer to the meta queue structure, which must be used to | |
1876 | * actually queue the route nodes to process. So create the MQ | |
1877 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1878 | * This semantics was introduced after 0.99.9 release. |
1879 | */ | |
e96f9203 DO |
1880 | if (!zebra->ribq->items->count) |
1881 | work_queue_add (zebra->ribq, zebra->mq); | |
1882 | ||
1883 | rib_meta_queue_add (zebra->mq, rn); | |
fc328ac9 SV |
1884 | |
1885 | if (IS_ZEBRA_DEBUG_RIB_Q) | |
1886 | zlog_debug ("%s: %s/%d: rn %p queued", __func__, buf, rn->p.prefixlen, rn); | |
1887 | ||
1888 | return; | |
4d38fdb4 | 1889 | } |
1890 | ||
5110a0c6 SH |
1891 | /* Create new meta queue. |
1892 | A destructor function doesn't seem to be necessary here. | |
1893 | */ | |
ef9b113e SH |
1894 | static struct meta_queue * |
1895 | meta_queue_new (void) | |
e96f9203 DO |
1896 | { |
1897 | struct meta_queue *new; | |
5110a0c6 SH |
1898 | unsigned i; |
1899 | ||
1900 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1901 | assert(new); | |
e96f9203 | 1902 | |
e96f9203 | 1903 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1904 | { |
1905 | new->subq[i] = list_new (); | |
1906 | assert(new->subq[i]); | |
1907 | } | |
1908 | ||
e96f9203 DO |
1909 | return new; |
1910 | } | |
1911 | ||
4d38fdb4 | 1912 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1913 | static void |
4d38fdb4 | 1914 | rib_queue_init (struct zebra_t *zebra) |
1915 | { | |
fc328ac9 SV |
1916 | assert (zebra); |
1917 | ||
4d38fdb4 | 1918 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 1919 | "route_node processing"))) |
4d38fdb4 | 1920 | { |
6d691129 | 1921 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 1922 | return; |
1923 | } | |
1924 | ||
1925 | /* fill in the work queue spec */ | |
e96f9203 | 1926 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 1927 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 1928 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 1929 | /* XXX: TODO: These should be runtime configurable via vty */ |
1930 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 1931 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 1932 | |
e96f9203 | 1933 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 1934 | { |
e96f9203 | 1935 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
1936 | return; |
1937 | } | |
1938 | return; | |
718e3744 | 1939 | } |
1940 | ||
6d691129 PJ |
1941 | /* RIB updates are processed via a queue of pointers to route_nodes. |
1942 | * | |
1943 | * The queue length is bounded by the maximal size of the routing table, | |
1944 | * as a route_node will not be requeued, if already queued. | |
1945 | * | |
3c0755dc PJ |
1946 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
1947 | * state, or static_install_ipv{4,6} (when an existing RIB is updated) | |
1948 | * and then submit route_node to queue for best-path selection later. | |
1949 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
1950 | * |
1951 | * Deleted RIBs are reaped during best-path selection. | |
1952 | * | |
1953 | * rib_addnode | |
1954 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
1955 | * |-------->| | best RIB, if required |
1956 | * | | | |
1957 | * static_install->|->rib_addqueue...... -> rib_process | |
1958 | * | | | |
1959 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
1960 | * |-> set RIB_ENTRY_REMOVE | |
1961 | * rib_delnode (RIB freed) | |
1962 | * | |
9fd92e3c AS |
1963 | * The 'info' pointer of a route_node points to a rib_dest_t |
1964 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
1965 | * dest is created on-demand by rib_link() and is kept around at least | |
1966 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
1967 | * |
1968 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
1969 | * | |
1970 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
1971 | * - dest attached to route_node: |
1972 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
1973 | * - route_node processing queue |
1974 | * - managed by: rib_addqueue, rib_process. | |
1975 | * | |
1976 | */ | |
1977 | ||
718e3744 | 1978 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 1979 | static void |
6d691129 | 1980 | rib_link (struct route_node *rn, struct rib *rib) |
718e3744 | 1981 | { |
1982 | struct rib *head; | |
9fd92e3c | 1983 | rib_dest_t *dest; |
f304cb48 | 1984 | char buf[INET6_ADDRSTRLEN]; |
7a4bb9c5 | 1985 | afi_t afi; |
9fd92e3c | 1986 | |
4d38fdb4 | 1987 | assert (rib && rn); |
1988 | ||
6d691129 | 1989 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 1990 | { |
f304cb48 | 1991 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
1992 | zlog_debug ("%s: %s/%d: rn %p, rib %p", __func__, |
1993 | buf, rn->p.prefixlen, rn, rib); | |
1994 | } | |
6d691129 | 1995 | |
9fd92e3c AS |
1996 | dest = rib_dest_from_rnode (rn); |
1997 | if (!dest) | |
6d691129 PJ |
1998 | { |
1999 | if (IS_ZEBRA_DEBUG_RIB) | |
9fd92e3c AS |
2000 | { |
2001 | zlog_debug ("%s: %s/%d: adding dest to table", __func__, | |
2002 | buf, rn->p.prefixlen); | |
2003 | } | |
2004 | ||
2005 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2006 | route_lock_node (rn); /* rn route table reference */ | |
2007 | rn->info = dest; | |
2008 | dest->rnode = rn; | |
2009 | } | |
2010 | ||
2011 | head = dest->routes; | |
2012 | if (head) | |
2013 | { | |
6d691129 | 2014 | head->prev = rib; |
6d691129 | 2015 | } |
718e3744 | 2016 | rib->next = head; |
9fd92e3c | 2017 | dest->routes = rib; |
7a4bb9c5 DS |
2018 | |
2019 | /* Further processing only if entry is in main table */ | |
2020 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2021 | rib_queue_add (&zebrad, rn); | |
2022 | else | |
2023 | { | |
2024 | if (IS_ZEBRA_DEBUG_RIB) | |
2025 | { | |
2026 | zlog_debug ("%s: %s/%d: Skipping further RIB processing of non-main table", | |
2027 | __func__, buf, rn->p.prefixlen); | |
2028 | } | |
2029 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2030 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2031 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2032 | zebra_add_import_table_entry(rn, rib); | |
2033 | } | |
718e3744 | 2034 | } |
2035 | ||
a1ac18c4 | 2036 | static void |
6d691129 | 2037 | rib_addnode (struct route_node *rn, struct rib *rib) |
718e3744 | 2038 | { |
6d691129 PJ |
2039 | /* RIB node has been un-removed before route-node is processed. |
2040 | * route_node must hence already be on the queue for processing.. | |
2041 | */ | |
2042 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2043 | { | |
2044 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2045 | { |
f304cb48 DO |
2046 | char buf[INET6_ADDRSTRLEN]; |
2047 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2048 | zlog_debug ("%s: %s/%d: rn %p, un-removed rib %p", |
2049 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2050 | } | |
6d691129 PJ |
2051 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2052 | return; | |
2053 | } | |
2054 | rib_link (rn, rib); | |
2055 | } | |
2056 | ||
9fd92e3c AS |
2057 | /* |
2058 | * rib_unlink | |
2059 | * | |
2060 | * Detach a rib structure from a route_node. | |
2061 | * | |
2062 | * Note that a call to rib_unlink() should be followed by a call to | |
2063 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2064 | * longer required to be deleted. | |
2065 | */ | |
6d691129 PJ |
2066 | static void |
2067 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2068 | { | |
f304cb48 | 2069 | char buf[INET6_ADDRSTRLEN]; |
9fd92e3c | 2070 | rib_dest_t *dest; |
6d691129 | 2071 | |
4d38fdb4 | 2072 | assert (rn && rib); |
6d691129 PJ |
2073 | |
2074 | if (IS_ZEBRA_DEBUG_RIB) | |
93bdadae | 2075 | { |
f304cb48 | 2076 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae PJ |
2077 | zlog_debug ("%s: %s/%d: rn %p, rib %p", |
2078 | __func__, buf, rn->p.prefixlen, rn, rib); | |
2079 | } | |
6d691129 | 2080 | |
9fd92e3c AS |
2081 | dest = rib_dest_from_rnode (rn); |
2082 | ||
718e3744 | 2083 | if (rib->next) |
2084 | rib->next->prev = rib->prev; | |
6d691129 | 2085 | |
718e3744 | 2086 | if (rib->prev) |
2087 | rib->prev->next = rib->next; | |
2088 | else | |
6d691129 | 2089 | { |
9fd92e3c | 2090 | dest->routes = rib->next; |
6d691129 PJ |
2091 | } |
2092 | ||
2093 | /* free RIB and nexthops */ | |
6e26278c | 2094 | nexthops_free(rib->nexthop, rn); |
6d691129 PJ |
2095 | XFREE (MTYPE_RIB, rib); |
2096 | ||
6d691129 PJ |
2097 | } |
2098 | ||
2099 | static void | |
2100 | rib_delnode (struct route_node *rn, struct rib *rib) | |
2101 | { | |
7a4bb9c5 DS |
2102 | afi_t afi; |
2103 | ||
6d691129 | 2104 | if (IS_ZEBRA_DEBUG_RIB) |
93bdadae | 2105 | { |
f304cb48 DO |
2106 | char buf[INET6_ADDRSTRLEN]; |
2107 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
93bdadae PJ |
2108 | zlog_debug ("%s: %s/%d: rn %p, rib %p, removing", __func__, |
2109 | buf, rn->p.prefixlen, rn, rib); | |
2110 | } | |
6d691129 | 2111 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 DS |
2112 | |
2113 | if ((rib->table == RT_TABLE_MAIN) || (rib->table == zebrad.rtm_table_default)) | |
2114 | rib_queue_add (&zebrad, rn); | |
2115 | else | |
2116 | { | |
2117 | afi = (rn->p.family == AF_INET) ? AFI_IP : | |
2118 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2119 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
2120 | zebra_del_import_table_entry(rn, rib); | |
2121 | /* Just clean up if non main table */ | |
2122 | rib_unlink(rn, rib); | |
2123 | } | |
718e3744 | 2124 | } |
2125 | ||
2126 | int | |
7c8ff89e | 2127 | rib_add_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7514fb77 | 2128 | struct in_addr *gate, struct in_addr *src, |
7a4bb9c5 | 2129 | unsigned int ifindex, u_int32_t table_id, |
cddf391b | 2130 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2131 | { |
2132 | struct rib *rib; | |
2133 | struct rib *same = NULL; | |
2134 | struct route_table *table; | |
2135 | struct route_node *rn; | |
2136 | struct nexthop *nexthop; | |
2137 | ||
2138 | /* Lookup table. */ | |
7a4bb9c5 DS |
2139 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2140 | { | |
2141 | table = vrf_table (AFI_IP, safi, 0); | |
2142 | } | |
2143 | else | |
2144 | { | |
2145 | table = vrf_other_route_table (AFI_IP, table_id, 0); | |
2146 | } | |
718e3744 | 2147 | if (! table) |
2148 | return 0; | |
2149 | ||
2150 | /* Make it sure prefixlen is applied to the prefix. */ | |
2151 | apply_mask_ipv4 (p); | |
2152 | ||
2153 | /* Set default distance by route type. */ | |
2154 | if (distance == 0) | |
2155 | { | |
837d16cc | 2156 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
2157 | distance = 150; |
2158 | else | |
2159 | distance = route_info[type].distance; | |
718e3744 | 2160 | |
2161 | /* iBGP distance is 200. */ | |
2162 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2163 | distance = 200; | |
2164 | } | |
2165 | ||
2166 | /* Lookup route node.*/ | |
2167 | rn = route_node_get (table, (struct prefix *) p); | |
2168 | ||
2169 | /* If same type of route are installed, treat it as a implicit | |
2170 | withdraw. */ | |
9fd92e3c | 2171 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2172 | { |
6d691129 PJ |
2173 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2174 | continue; | |
2175 | ||
ebf1ead0 | 2176 | if (rib->type != type) |
2177 | continue; | |
7c8ff89e DS |
2178 | if (rib->instance != instance) |
2179 | continue; | |
7a4bb9c5 | 2180 | |
ebf1ead0 | 2181 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2182 | { |
2183 | same = rib; | |
2184 | break; | |
2185 | } | |
ebf1ead0 | 2186 | /* Duplicate connected route comes in. */ |
2187 | else if ((nexthop = rib->nexthop) && | |
2188 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
2189 | nexthop->ifindex == ifindex && |
2190 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2191 | { |
2192 | rib->refcnt++; | |
2193 | return 0 ; | |
2194 | } | |
718e3744 | 2195 | } |
2196 | ||
2197 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2198 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 2199 | rib->type = type; |
7c8ff89e | 2200 | rib->instance = instance; |
718e3744 | 2201 | rib->distance = distance; |
2202 | rib->flags = flags; | |
2203 | rib->metric = metric; | |
7a4bb9c5 | 2204 | rib->table = table_id; |
718e3744 | 2205 | rib->nexthop_num = 0; |
2206 | rib->uptime = time (NULL); | |
2207 | ||
2208 | /* Nexthop settings. */ | |
2209 | if (gate) | |
2210 | { | |
2211 | if (ifindex) | |
7514fb77 | 2212 | nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 2213 | else |
7514fb77 | 2214 | nexthop_ipv4_add (rib, gate, src); |
718e3744 | 2215 | } |
2216 | else | |
2217 | nexthop_ifindex_add (rib, ifindex); | |
2218 | ||
2219 | /* If this route is kernel route, set FIB flag to the route. */ | |
2220 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2221 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2222 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2223 | ||
2224 | /* Link new rib to node.*/ | |
dc95824a | 2225 | if (IS_ZEBRA_DEBUG_RIB) |
7a4bb9c5 DS |
2226 | { |
2227 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2228 | __func__, rn, rib); | |
2229 | rib_dump ((struct prefix *)p, rib); | |
2230 | } | |
718e3744 | 2231 | rib_addnode (rn, rib); |
4d38fdb4 | 2232 | |
718e3744 | 2233 | /* Free implicit route.*/ |
2234 | if (same) | |
dc95824a DO |
2235 | { |
2236 | if (IS_ZEBRA_DEBUG_RIB) | |
2237 | zlog_debug ("%s: calling rib_delnode (%p, %p)", __func__, rn, rib); | |
4d38fdb4 | 2238 | rib_delnode (rn, same); |
dc95824a | 2239 | } |
4d38fdb4 | 2240 | |
2241 | route_unlock_node (rn); | |
718e3744 | 2242 | return 0; |
2243 | } | |
2244 | ||
dc95824a DO |
2245 | /* This function dumps the contents of a given RIB entry into |
2246 | * standard debug log. Calling function name and IP prefix in | |
2247 | * question are passed as 1st and 2nd arguments. | |
2248 | */ | |
2249 | ||
f7bf4153 DL |
2250 | void _rib_dump (const char * func, |
2251 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2252 | { |
f7bf4153 | 2253 | const struct prefix *p = pp.p; |
fed643f4 | 2254 | char straddr[INET6_ADDRSTRLEN]; |
fa713d9e CF |
2255 | struct nexthop *nexthop, *tnexthop; |
2256 | int recursing; | |
dc95824a | 2257 | |
fed643f4 | 2258 | inet_ntop (p->family, &p->u.prefix, straddr, INET6_ADDRSTRLEN); |
fa713d9e | 2259 | zlog_debug ("%s: dumping RIB entry %p for %s/%d", func, rib, straddr, p->prefixlen); |
dc95824a DO |
2260 | zlog_debug |
2261 | ( | |
7c8ff89e | 2262 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2263 | func, |
2264 | rib->refcnt, | |
d02c56cd | 2265 | (unsigned long) rib->uptime, |
dc95824a | 2266 | rib->type, |
7c8ff89e | 2267 | rib->instance, |
dc95824a DO |
2268 | rib->table |
2269 | ); | |
2270 | zlog_debug | |
2271 | ( | |
2272 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
2273 | func, | |
2274 | rib->metric, | |
2275 | rib->distance, | |
2276 | rib->flags, | |
2277 | rib->status | |
2278 | ); | |
2279 | zlog_debug | |
2280 | ( | |
2281 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2282 | func, | |
2283 | rib->nexthop_num, | |
2284 | rib->nexthop_active_num, | |
2285 | rib->nexthop_fib_num | |
2286 | ); | |
fed643f4 | 2287 | |
fa713d9e CF |
2288 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2289 | { | |
fed643f4 | 2290 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2291 | zlog_debug |
2292 | ( | |
2293 | "%s: %s %s with flags %s%s%s", | |
2294 | func, | |
2295 | (recursing ? " NH" : "NH"), | |
2296 | straddr, | |
2297 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2298 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2299 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2300 | ); | |
2301 | } | |
dc95824a DO |
2302 | zlog_debug ("%s: dump complete", func); |
2303 | } | |
2304 | ||
2305 | /* This is an exported helper to rtm_read() to dump the strange | |
2306 | * RIB entry found by rib_lookup_ipv4_route() | |
2307 | */ | |
2308 | ||
2309 | void rib_lookup_and_dump (struct prefix_ipv4 * p) | |
2310 | { | |
2311 | struct route_table *table; | |
2312 | struct route_node *rn; | |
2313 | struct rib *rib; | |
2314 | char prefix_buf[INET_ADDRSTRLEN]; | |
2315 | ||
2316 | /* Lookup table. */ | |
2317 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2318 | if (! table) | |
2319 | { | |
2320 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
2321 | return; | |
2322 | } | |
2323 | ||
2324 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
2325 | /* Scan the RIB table for exactly matching RIB entry. */ | |
2326 | rn = route_node_lookup (table, (struct prefix *) p); | |
2327 | ||
2328 | /* No route for this prefix. */ | |
2329 | if (! rn) | |
2330 | { | |
2331 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
2332 | return; | |
2333 | } | |
2334 | ||
2335 | /* Unlock node. */ | |
2336 | route_unlock_node (rn); | |
2337 | ||
2338 | /* let's go */ | |
9fd92e3c | 2339 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2340 | { |
2341 | zlog_debug | |
2342 | ( | |
2343 | "%s: rn %p, rib %p: %s, %s", | |
2344 | __func__, | |
2345 | rn, | |
2346 | rib, | |
2347 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
2348 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2349 | ); | |
f7bf4153 | 2350 | rib_dump (p, rib); |
dc95824a DO |
2351 | } |
2352 | } | |
2353 | ||
20e5ff0a DO |
2354 | /* Check if requested address assignment will fail due to another |
2355 | * route being installed by zebra in FIB already. Take necessary | |
2356 | * actions, if needed: remove such a route from FIB and deSELECT | |
2357 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2358 | */ | |
2359 | void rib_lookup_and_pushup (struct prefix_ipv4 * p) | |
2360 | { | |
2361 | struct route_table *table; | |
2362 | struct route_node *rn; | |
2363 | struct rib *rib; | |
2364 | unsigned changed = 0; | |
2365 | ||
2366 | if (NULL == (table = vrf_table (AFI_IP, SAFI_UNICAST, 0))) | |
2367 | { | |
2368 | zlog_err ("%s: vrf_table() returned NULL", __func__); | |
2369 | return; | |
2370 | } | |
2371 | ||
2372 | /* No matches would be the simplest case. */ | |
2373 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2374 | return; | |
2375 | ||
2376 | /* Unlock node. */ | |
2377 | route_unlock_node (rn); | |
2378 | ||
2379 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2380 | * the RN into RIBQ head. If the routing message about the new connected | |
2381 | * route (generated by the IP address we are going to assign very soon) | |
2382 | * comes before the RIBQ is processed, the new RIB entry will join | |
2383 | * RIBQ record already on head. This is necessary for proper revalidation | |
2384 | * of the rest of the RIB. | |
2385 | */ | |
9fd92e3c | 2386 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2387 | { |
2388 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2389 | ! RIB_SYSTEM_ROUTE (rib)) | |
2390 | { | |
2391 | changed = 1; | |
2392 | if (IS_ZEBRA_DEBUG_RIB) | |
2393 | { | |
2394 | char buf[INET_ADDRSTRLEN]; | |
2395 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
2396 | zlog_debug ("%s: freeing way for connected prefix %s/%d", __func__, buf, p->prefixlen); | |
f7bf4153 | 2397 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2398 | } |
2399 | rib_uninstall (rn, rib); | |
2400 | } | |
2401 | } | |
2402 | if (changed) | |
20e5ff0a | 2403 | rib_queue_add (&zebrad, rn); |
20e5ff0a DO |
2404 | } |
2405 | ||
718e3744 | 2406 | int |
cddf391b | 2407 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2408 | { |
2409 | struct route_table *table; | |
2410 | struct route_node *rn; | |
2411 | struct rib *same; | |
2412 | struct nexthop *nexthop; | |
04b02fda | 2413 | int ret = 0; |
4d38fdb4 | 2414 | |
718e3744 | 2415 | /* Lookup table. */ |
7a4bb9c5 DS |
2416 | if ((rib->table == zebrad.rtm_table_default) || (rib->table == RT_TABLE_MAIN)) |
2417 | { | |
2418 | table = vrf_table (AFI_IP, safi, 0); | |
2419 | } | |
2420 | else | |
2421 | { | |
2422 | table = vrf_other_route_table (AFI_IP, rib->table, 0); | |
2423 | } | |
718e3744 | 2424 | if (! table) |
2425 | return 0; | |
cddf391b | 2426 | |
718e3744 | 2427 | /* Make it sure prefixlen is applied to the prefix. */ |
2428 | apply_mask_ipv4 (p); | |
2429 | ||
2430 | /* Set default distance by route type. */ | |
2431 | if (rib->distance == 0) | |
2432 | { | |
2433 | rib->distance = route_info[rib->type].distance; | |
2434 | ||
2435 | /* iBGP distance is 200. */ | |
2436 | if (rib->type == ZEBRA_ROUTE_BGP | |
2437 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2438 | rib->distance = 200; | |
2439 | } | |
2440 | ||
2441 | /* Lookup route node.*/ | |
2442 | rn = route_node_get (table, (struct prefix *) p); | |
2443 | ||
2444 | /* If same type of route are installed, treat it as a implicit | |
2445 | withdraw. */ | |
9fd92e3c | 2446 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2447 | { |
0b8c4f1d | 2448 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2449 | continue; |
2450 | ||
7c8ff89e DS |
2451 | if (same->type == rib->type && same->instance == rib->instance |
2452 | && same->table == rib->table | |
718e3744 | 2453 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2454 | break; |
718e3744 | 2455 | } |
4d38fdb4 | 2456 | |
718e3744 | 2457 | /* If this route is kernel route, set FIB flag to the route. */ |
2458 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2459 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2460 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2461 | ||
2462 | /* Link new rib to node.*/ | |
2463 | rib_addnode (rn, rib); | |
04b02fda | 2464 | ret = 1; |
dc95824a DO |
2465 | if (IS_ZEBRA_DEBUG_RIB) |
2466 | { | |
2467 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
2468 | __func__, rn, rib); | |
f7bf4153 | 2469 | rib_dump (p, rib); |
dc95824a | 2470 | } |
718e3744 | 2471 | |
718e3744 | 2472 | /* Free implicit route.*/ |
2473 | if (same) | |
dc95824a DO |
2474 | { |
2475 | if (IS_ZEBRA_DEBUG_RIB) | |
2476 | { | |
2477 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
2478 | __func__, rn, same); | |
f7bf4153 | 2479 | rib_dump (p, same); |
dc95824a | 2480 | } |
4d38fdb4 | 2481 | rib_delnode (rn, same); |
04b02fda | 2482 | ret = -1; |
dc95824a | 2483 | } |
4d38fdb4 | 2484 | |
2485 | route_unlock_node (rn); | |
04b02fda | 2486 | return ret; |
718e3744 | 2487 | } |
2488 | ||
ebf1ead0 | 2489 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2490 | int |
7c8ff89e | 2491 | rib_delete_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7a4bb9c5 DS |
2492 | struct in_addr *gate, unsigned int ifindex, |
2493 | u_int32_t table_id, safi_t safi) | |
718e3744 | 2494 | { |
2495 | struct route_table *table; | |
2496 | struct route_node *rn; | |
2497 | struct rib *rib; | |
2498 | struct rib *fib = NULL; | |
2499 | struct rib *same = NULL; | |
fa713d9e CF |
2500 | struct nexthop *nexthop, *tnexthop; |
2501 | int recursing; | |
81cce018 SH |
2502 | char buf1[INET_ADDRSTRLEN]; |
2503 | char buf2[INET_ADDRSTRLEN]; | |
718e3744 | 2504 | |
2505 | /* Lookup table. */ | |
7a4bb9c5 DS |
2506 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
2507 | { | |
2508 | table = vrf_table (AFI_IP, safi, 0); | |
2509 | } | |
2510 | else | |
2511 | { | |
2512 | table = vrf_other_route_table(AFI_IP, table_id, 0); | |
2513 | } | |
718e3744 | 2514 | if (! table) |
2515 | return 0; | |
2516 | ||
2517 | /* Apply mask. */ | |
2518 | apply_mask_ipv4 (p); | |
2519 | ||
b52aef18 CF |
2520 | if (IS_ZEBRA_DEBUG_KERNEL) |
2521 | { | |
2522 | if (gate) | |
2523 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d via %s ifindex %d", | |
2524 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2525 | p->prefixlen, | |
2526 | inet_ntoa (*gate), | |
2527 | ifindex); | |
2528 | else | |
2529 | zlog_debug ("rib_delete_ipv4(): route delete %s/%d ifindex %d", | |
2530 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2531 | p->prefixlen, | |
2532 | ifindex); | |
2533 | } | |
5ec90d28 | 2534 | |
718e3744 | 2535 | /* Lookup route node. */ |
2536 | rn = route_node_lookup (table, (struct prefix *) p); | |
2537 | if (! rn) | |
2538 | { | |
2539 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2540 | { | |
2541 | if (gate) | |
b6178002 | 2542 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 2543 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2544 | p->prefixlen, |
81cce018 | 2545 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2546 | ifindex); |
2547 | else | |
b6178002 | 2548 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 2549 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2550 | p->prefixlen, |
2551 | ifindex); | |
2552 | } | |
2553 | return ZEBRA_ERR_RTNOEXIST; | |
2554 | } | |
2555 | ||
2556 | /* Lookup same type route. */ | |
9fd92e3c | 2557 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2558 | { |
6d691129 PJ |
2559 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2560 | continue; | |
2561 | ||
718e3744 | 2562 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2563 | fib = rib; | |
2564 | ||
ebf1ead0 | 2565 | if (rib->type != type) |
2566 | continue; | |
7c8ff89e DS |
2567 | if (rib->instance != instance) |
2568 | continue; | |
ebf1ead0 | 2569 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2570 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2571 | { |
4f1735fd MF |
2572 | if (nexthop->ifindex != ifindex) |
2573 | continue; | |
ebf1ead0 | 2574 | if (rib->refcnt) |
718e3744 | 2575 | { |
ebf1ead0 | 2576 | rib->refcnt--; |
2577 | route_unlock_node (rn); | |
2578 | route_unlock_node (rn); | |
2579 | return 0; | |
718e3744 | 2580 | } |
ebf1ead0 | 2581 | same = rib; |
2582 | break; | |
718e3744 | 2583 | } |
ebf1ead0 | 2584 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2585 | else |
5ec90d28 | 2586 | { |
fa713d9e CF |
2587 | if (gate == NULL) |
2588 | { | |
2589 | same = rib; | |
2590 | break; | |
2591 | } | |
2592 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
2593 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate)) | |
2594 | { | |
2595 | same = rib; | |
2596 | break; | |
2597 | } | |
2598 | if (same) | |
2599 | break; | |
2600 | } | |
718e3744 | 2601 | } |
718e3744 | 2602 | /* If same type of route can't be found and this message is from |
2603 | kernel. */ | |
2604 | if (! same) | |
2605 | { | |
2037f143 DS |
2606 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2607 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2608 | { | |
2609 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2610 | { | |
2611 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
2612 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
2613 | p->prefixlen); | |
2614 | } | |
2615 | /* This means someone else, other than Zebra, has deleted | |
2616 | * a Zebra router from the kernel. We will add it back */ | |
2617 | rib_install_kernel(rn, fib); | |
2618 | } | |
718e3744 | 2619 | else |
2620 | { | |
2621 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2622 | { | |
2623 | if (gate) | |
b6178002 | 2624 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 2625 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2626 | p->prefixlen, |
81cce018 | 2627 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2628 | ifindex, |
2629 | type); | |
2630 | else | |
b6178002 | 2631 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 2632 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), |
718e3744 | 2633 | p->prefixlen, |
2634 | ifindex, | |
2635 | type); | |
2636 | } | |
2637 | route_unlock_node (rn); | |
2638 | return ZEBRA_ERR_RTNOEXIST; | |
2639 | } | |
2640 | } | |
4d38fdb4 | 2641 | |
718e3744 | 2642 | if (same) |
4d38fdb4 | 2643 | rib_delnode (rn, same); |
2644 | ||
718e3744 | 2645 | route_unlock_node (rn); |
718e3744 | 2646 | return 0; |
2647 | } | |
6b0655a2 | 2648 | |
718e3744 | 2649 | /* Install static route into rib. */ |
a1ac18c4 | 2650 | static void |
718e3744 | 2651 | static_install_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2652 | { | |
2653 | struct rib *rib; | |
2654 | struct route_node *rn; | |
2655 | struct route_table *table; | |
6e26278c | 2656 | struct prefix nh_p; |
718e3744 | 2657 | |
2658 | /* Lookup table. */ | |
2659 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2660 | if (! table) | |
2661 | return; | |
2662 | ||
2663 | /* Lookup existing route */ | |
2664 | rn = route_node_get (table, p); | |
9fd92e3c | 2665 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2666 | { |
2667 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2668 | continue; | |
2669 | ||
2670 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2671 | break; | |
2672 | } | |
718e3744 | 2673 | |
2674 | if (rib) | |
2675 | { | |
0d9551dc DS |
2676 | /* if tag value changed , update old value in RIB */ |
2677 | if (rib->tag != si->tag) | |
2678 | rib->tag = si->tag; | |
2679 | ||
718e3744 | 2680 | /* Same distance static route is there. Update it with new |
2681 | nexthop. */ | |
718e3744 | 2682 | route_unlock_node (rn); |
718e3744 | 2683 | switch (si->type) |
7021c425 | 2684 | { |
2685 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2686 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2687 | nh_p.family = AF_INET; |
2688 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2689 | nh_p.u.prefix4 = si->gate.ipv4; | |
2690 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2691 | break; |
2692 | case STATIC_IPV4_IFNAME: | |
2693 | nexthop_ifname_add (rib, si->gate.ifname); | |
2694 | break; | |
2695 | case STATIC_IPV4_BLACKHOLE: | |
2696 | nexthop_blackhole_add (rib); | |
2697 | break; | |
4d38fdb4 | 2698 | } |
3c0755dc | 2699 | rib_queue_add (&zebrad, rn); |
718e3744 | 2700 | } |
2701 | else | |
2702 | { | |
2703 | /* This is new static route. */ | |
4d38fdb4 | 2704 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2705 | ||
718e3744 | 2706 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 2707 | rib->instance = 0; |
718e3744 | 2708 | rib->distance = si->distance; |
2709 | rib->metric = 0; | |
b0145ddb | 2710 | rib->table = zebrad.rtm_table_default; |
718e3744 | 2711 | rib->nexthop_num = 0; |
0d9551dc | 2712 | rib->tag = si->tag; |
718e3744 | 2713 | |
2714 | switch (si->type) | |
7021c425 | 2715 | { |
2716 | case STATIC_IPV4_GATEWAY: | |
7514fb77 | 2717 | nexthop_ipv4_add (rib, &si->gate.ipv4, NULL); |
6e26278c DS |
2718 | nh_p.family = AF_INET; |
2719 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2720 | nh_p.u.prefix4 = si->gate.ipv4; | |
2721 | zebra_register_rnh_static_nh(&nh_p, rn); | |
7021c425 | 2722 | break; |
2723 | case STATIC_IPV4_IFNAME: | |
2724 | nexthop_ifname_add (rib, si->gate.ifname); | |
2725 | break; | |
2726 | case STATIC_IPV4_BLACKHOLE: | |
2727 | nexthop_blackhole_add (rib); | |
2728 | break; | |
2729 | } | |
718e3744 | 2730 | |
81dfcaa2 | 2731 | /* Save the flags of this static routes (reject, blackhole) */ |
2732 | rib->flags = si->flags; | |
2733 | ||
718e3744 | 2734 | /* Link this rib to the tree. */ |
2735 | rib_addnode (rn, rib); | |
718e3744 | 2736 | } |
2737 | } | |
2738 | ||
a1ac18c4 | 2739 | static int |
718e3744 | 2740 | static_ipv4_nexthop_same (struct nexthop *nexthop, struct static_ipv4 *si) |
2741 | { | |
2742 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2743 | && si->type == STATIC_IPV4_GATEWAY | |
2744 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->gate.ipv4)) | |
2745 | return 1; | |
2746 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
2747 | && si->type == STATIC_IPV4_IFNAME | |
2748 | && strcmp (nexthop->ifname, si->gate.ifname) == 0) | |
2749 | return 1; | |
595db7f1 | 2750 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2751 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2752 | return 1; | |
e8e1946e | 2753 | return 0; |
718e3744 | 2754 | } |
2755 | ||
2756 | /* Uninstall static route from RIB. */ | |
a1ac18c4 | 2757 | static void |
718e3744 | 2758 | static_uninstall_ipv4 (struct prefix *p, struct static_ipv4 *si) |
2759 | { | |
2760 | struct route_node *rn; | |
2761 | struct rib *rib; | |
2762 | struct nexthop *nexthop; | |
2763 | struct route_table *table; | |
6e26278c | 2764 | struct prefix nh_p; |
718e3744 | 2765 | |
2766 | /* Lookup table. */ | |
2767 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); | |
2768 | if (! table) | |
2769 | return; | |
4d38fdb4 | 2770 | |
718e3744 | 2771 | /* Lookup existing route with type and distance. */ |
2772 | rn = route_node_lookup (table, p); | |
2773 | if (! rn) | |
2774 | return; | |
2775 | ||
9fd92e3c | 2776 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2777 | { |
2778 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2779 | continue; | |
2780 | ||
0d9551dc DS |
2781 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
2782 | rib->tag == si->tag) | |
6d691129 PJ |
2783 | break; |
2784 | } | |
718e3744 | 2785 | |
2786 | if (! rib) | |
2787 | { | |
2788 | route_unlock_node (rn); | |
2789 | return; | |
2790 | } | |
2791 | ||
2792 | /* Lookup nexthop. */ | |
2793 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2794 | if (static_ipv4_nexthop_same (nexthop, si)) | |
2795 | break; | |
2796 | ||
2797 | /* Can't find nexthop. */ | |
2798 | if (! nexthop) | |
2799 | { | |
2800 | route_unlock_node (rn); | |
2801 | return; | |
2802 | } | |
2803 | ||
2804 | /* Check nexthop. */ | |
2805 | if (rib->nexthop_num == 1) | |
6d691129 | 2806 | rib_delnode (rn, rib); |
718e3744 | 2807 | else |
2808 | { | |
6baeb988 | 2809 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
2810 | rib_uninstall (rn, rib); | |
6e26278c DS |
2811 | |
2812 | nh_p.family = AF_INET; | |
2813 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2814 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
319572cc | 2815 | nexthop_delete (rib, nexthop); |
6e26278c DS |
2816 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
2817 | nexthop_free (nexthop, rn); | |
6d691129 | 2818 | rib_queue_add (&zebrad, rn); |
718e3744 | 2819 | } |
718e3744 | 2820 | /* Unlock node. */ |
2821 | route_unlock_node (rn); | |
2822 | } | |
2823 | ||
2824 | /* Add static route into static route configuration. */ | |
2825 | int | |
39db97e4 | 2826 | static_add_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 2827 | u_char flags, u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 2828 | { |
2829 | u_char type = 0; | |
2830 | struct route_node *rn; | |
2831 | struct static_ipv4 *si; | |
2832 | struct static_ipv4 *pp; | |
2833 | struct static_ipv4 *cp; | |
2834 | struct static_ipv4 *update = NULL; | |
2835 | struct route_table *stable; | |
2836 | ||
2837 | /* Lookup table. */ | |
2838 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2839 | if (! stable) | |
2840 | return -1; | |
2841 | ||
2842 | /* Lookup static route prefix. */ | |
2843 | rn = route_node_get (stable, p); | |
2844 | ||
2845 | /* Make flags. */ | |
2846 | if (gate) | |
2847 | type = STATIC_IPV4_GATEWAY; | |
368aa3f0 | 2848 | else if (ifname) |
718e3744 | 2849 | type = STATIC_IPV4_IFNAME; |
595db7f1 | 2850 | else |
2851 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2852 | |
2853 | /* Do nothing if there is a same static route. */ | |
2854 | for (si = rn->info; si; si = si->next) | |
2855 | { | |
2856 | if (type == si->type | |
2857 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
2858 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0)) | |
2859 | { | |
0d9551dc | 2860 | if ((distance == si->distance) && (tag == si->tag)) |
718e3744 | 2861 | { |
2862 | route_unlock_node (rn); | |
2863 | return 0; | |
2864 | } | |
2865 | else | |
2866 | update = si; | |
2867 | } | |
2868 | } | |
2869 | ||
0d9551dc | 2870 | /* Distance or tag changed. */ |
718e3744 | 2871 | if (update) |
0d9551dc | 2872 | static_delete_ipv4 (p, gate, ifname, update->tag, update->distance, vrf_id); |
718e3744 | 2873 | |
2874 | /* Make new static route structure. */ | |
393deb9b | 2875 | si = XCALLOC (MTYPE_STATIC_IPV4, sizeof (struct static_ipv4)); |
718e3744 | 2876 | |
2877 | si->type = type; | |
2878 | si->distance = distance; | |
81dfcaa2 | 2879 | si->flags = flags; |
0d9551dc | 2880 | si->tag = tag; |
718e3744 | 2881 | |
2882 | if (gate) | |
2883 | si->gate.ipv4 = *gate; | |
2884 | if (ifname) | |
2885 | si->gate.ifname = XSTRDUP (0, ifname); | |
2886 | ||
2887 | /* Add new static route information to the tree with sort by | |
2888 | distance value and gateway address. */ | |
2889 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
2890 | { | |
2891 | if (si->distance < cp->distance) | |
2892 | break; | |
2893 | if (si->distance > cp->distance) | |
2894 | continue; | |
2895 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
2896 | { | |
2897 | if (ntohl (si->gate.ipv4.s_addr) < ntohl (cp->gate.ipv4.s_addr)) | |
2898 | break; | |
2899 | if (ntohl (si->gate.ipv4.s_addr) > ntohl (cp->gate.ipv4.s_addr)) | |
2900 | continue; | |
2901 | } | |
2902 | } | |
2903 | ||
2904 | /* Make linked list. */ | |
2905 | if (pp) | |
2906 | pp->next = si; | |
2907 | else | |
2908 | rn->info = si; | |
2909 | if (cp) | |
2910 | cp->prev = si; | |
2911 | si->prev = pp; | |
2912 | si->next = cp; | |
2913 | ||
2914 | /* Install into rib. */ | |
2915 | static_install_ipv4 (p, si); | |
2916 | ||
2917 | return 1; | |
2918 | } | |
2919 | ||
2920 | /* Delete static route from static route configuration. */ | |
2921 | int | |
39db97e4 | 2922 | static_delete_ipv4 (struct prefix *p, struct in_addr *gate, const char *ifname, |
0d9551dc | 2923 | u_short tag, u_char distance, u_int32_t vrf_id) |
718e3744 | 2924 | { |
2925 | u_char type = 0; | |
2926 | struct route_node *rn; | |
2927 | struct static_ipv4 *si; | |
2928 | struct route_table *stable; | |
2929 | ||
2930 | /* Lookup table. */ | |
2931 | stable = vrf_static_table (AFI_IP, SAFI_UNICAST, vrf_id); | |
2932 | if (! stable) | |
2933 | return -1; | |
2934 | ||
2935 | /* Lookup static route prefix. */ | |
2936 | rn = route_node_lookup (stable, p); | |
2937 | if (! rn) | |
2938 | return 0; | |
2939 | ||
2940 | /* Make flags. */ | |
2941 | if (gate) | |
2942 | type = STATIC_IPV4_GATEWAY; | |
2943 | else if (ifname) | |
2944 | type = STATIC_IPV4_IFNAME; | |
595db7f1 | 2945 | else |
2946 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 2947 | |
2948 | /* Find same static route is the tree */ | |
2949 | for (si = rn->info; si; si = si->next) | |
2950 | if (type == si->type | |
2951 | && (! gate || IPV4_ADDR_SAME (gate, &si->gate.ipv4)) | |
0d9551dc DS |
2952 | && (! ifname || strcmp (ifname, si->gate.ifname) == 0) |
2953 | && (! tag || (tag == si->tag))) | |
718e3744 | 2954 | break; |
2955 | ||
2956 | /* Can't find static route. */ | |
2957 | if (! si) | |
2958 | { | |
2959 | route_unlock_node (rn); | |
2960 | return 0; | |
2961 | } | |
2962 | ||
2963 | /* Install into rib. */ | |
2964 | static_uninstall_ipv4 (p, si); | |
2965 | ||
2966 | /* Unlink static route from linked list. */ | |
2967 | if (si->prev) | |
2968 | si->prev->next = si->next; | |
2969 | else | |
2970 | rn->info = si->next; | |
2971 | if (si->next) | |
2972 | si->next->prev = si->prev; | |
143a385f | 2973 | route_unlock_node (rn); |
718e3744 | 2974 | |
2975 | /* Free static route configuration. */ | |
a0f6acd8 | 2976 | if (ifname) |
2977 | XFREE (0, si->gate.ifname); | |
718e3744 | 2978 | XFREE (MTYPE_STATIC_IPV4, si); |
2979 | ||
143a385f | 2980 | route_unlock_node (rn); |
2981 | ||
718e3744 | 2982 | return 1; |
2983 | } | |
2984 | ||
6b0655a2 | 2985 | |
718e3744 | 2986 | #ifdef HAVE_IPV6 |
41fc2714 | 2987 | int |
718e3744 | 2988 | rib_bogus_ipv6 (int type, struct prefix_ipv6 *p, |
2989 | struct in6_addr *gate, unsigned int ifindex, int table) | |
2990 | { | |
726f9b2b | 2991 | if (type == ZEBRA_ROUTE_CONNECT && IN6_IS_ADDR_UNSPECIFIED (&p->prefix)) { |
2992 | #if defined (MUSICA) || defined (LINUX) | |
2993 | /* IN6_IS_ADDR_V4COMPAT(&p->prefix) */ | |
2994 | if (p->prefixlen == 96) | |
2995 | return 0; | |
2996 | #endif /* MUSICA */ | |
718e3744 | 2997 | return 1; |
726f9b2b | 2998 | } |
718e3744 | 2999 | if (type == ZEBRA_ROUTE_KERNEL && IN6_IS_ADDR_UNSPECIFIED (&p->prefix) |
3000 | && p->prefixlen == 96 && gate && IN6_IS_ADDR_UNSPECIFIED (gate)) | |
3001 | { | |
3002 | kernel_delete_ipv6_old (p, gate, ifindex, 0, table); | |
3003 | return 1; | |
3004 | } | |
3005 | return 0; | |
3006 | } | |
3007 | ||
3008 | int | |
7c8ff89e | 3009 | rib_add_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3010 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, |
f768f367 | 3011 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 3012 | { |
3013 | struct rib *rib; | |
3014 | struct rib *same = NULL; | |
3015 | struct route_table *table; | |
3016 | struct route_node *rn; | |
3017 | struct nexthop *nexthop; | |
3018 | ||
718e3744 | 3019 | /* Lookup table. */ |
7a4bb9c5 DS |
3020 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3021 | { | |
3022 | table = vrf_table (AFI_IP6, safi, 0); | |
3023 | } | |
3024 | else | |
3025 | { | |
3026 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3027 | } | |
718e3744 | 3028 | if (! table) |
3029 | return 0; | |
3030 | ||
3031 | /* Make sure mask is applied. */ | |
3032 | apply_mask_ipv6 (p); | |
3033 | ||
3034 | /* Set default distance by route type. */ | |
be61c4eb | 3035 | if (!distance) |
3036 | distance = route_info[type].distance; | |
718e3744 | 3037 | |
3038 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
3039 | distance = 200; | |
3040 | ||
3041 | /* Filter bogus route. */ | |
3042 | if (rib_bogus_ipv6 (type, p, gate, ifindex, 0)) | |
3043 | return 0; | |
3044 | ||
3045 | /* Lookup route node.*/ | |
3046 | rn = route_node_get (table, (struct prefix *) p); | |
3047 | ||
3048 | /* If same type of route are installed, treat it as a implicit | |
3049 | withdraw. */ | |
9fd92e3c | 3050 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3051 | { |
6d691129 PJ |
3052 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3053 | continue; | |
3054 | ||
ebf1ead0 | 3055 | if (rib->type != type) |
3056 | continue; | |
7c8ff89e DS |
3057 | if (rib->instance != instance) |
3058 | continue; | |
ebf1ead0 | 3059 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 3060 | { |
3061 | same = rib; | |
718e3744 | 3062 | break; |
3063 | } | |
ebf1ead0 | 3064 | else if ((nexthop = rib->nexthop) && |
3065 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3066 | nexthop->ifindex == ifindex) | |
3067 | { | |
3068 | rib->refcnt++; | |
3069 | return 0; | |
3070 | } | |
718e3744 | 3071 | } |
3072 | ||
3073 | /* Allocate new rib structure. */ | |
4d38fdb4 | 3074 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3075 | ||
718e3744 | 3076 | rib->type = type; |
7c8ff89e | 3077 | rib->instance = instance; |
718e3744 | 3078 | rib->distance = distance; |
3079 | rib->flags = flags; | |
3080 | rib->metric = metric; | |
7a4bb9c5 | 3081 | rib->table = table_id; |
718e3744 | 3082 | rib->nexthop_num = 0; |
3083 | rib->uptime = time (NULL); | |
3084 | ||
3085 | /* Nexthop settings. */ | |
3086 | if (gate) | |
3087 | { | |
3088 | if (ifindex) | |
3089 | nexthop_ipv6_ifindex_add (rib, gate, ifindex); | |
3090 | else | |
3091 | nexthop_ipv6_add (rib, gate); | |
3092 | } | |
3093 | else | |
3094 | nexthop_ifindex_add (rib, ifindex); | |
3095 | ||
3096 | /* If this route is kernel route, set FIB flag to the route. */ | |
3097 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
3098 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3099 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3100 | ||
3101 | /* Link new rib to node.*/ | |
3102 | rib_addnode (rn, rib); | |
fed643f4 VB |
3103 | if (IS_ZEBRA_DEBUG_RIB) |
3104 | { | |
3105 | zlog_debug ("%s: called rib_addnode (%p, %p) on new RIB entry", | |
3106 | __func__, rn, rib); | |
f7bf4153 | 3107 | rib_dump (p, rib); |
fed643f4 | 3108 | } |
718e3744 | 3109 | |
718e3744 | 3110 | /* Free implicit route.*/ |
3111 | if (same) | |
fed643f4 VB |
3112 | { |
3113 | if (IS_ZEBRA_DEBUG_RIB) | |
3114 | { | |
3115 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3116 | __func__, rn, same); | |
f7bf4153 | 3117 | rib_dump (p, same); |
fed643f4 | 3118 | } |
4d38fdb4 | 3119 | rib_delnode (rn, same); |
fed643f4 | 3120 | } |
4d38fdb4 | 3121 | |
3122 | route_unlock_node (rn); | |
718e3744 | 3123 | return 0; |
3124 | } | |
3125 | ||
41fc2714 DS |
3126 | int |
3127 | rib_add_ipv6_multipath (struct prefix_ipv6 *p, struct rib *rib, safi_t safi, | |
3128 | unsigned long ifindex) | |
3129 | { | |
3130 | struct route_table *table; | |
3131 | struct route_node *rn; | |
3132 | struct rib *same = NULL; | |
3133 | struct nexthop *nexthop; | |
3134 | int ret = 0; | |
7a4bb9c5 | 3135 | int table_id = 0; |
41fc2714 | 3136 | |
7a4bb9c5 DS |
3137 | if (rib) |
3138 | table_id = rib->table; | |
3139 | else | |
41fc2714 DS |
3140 | return 0; /* why are we getting called with NULL rib */ |
3141 | ||
3142 | /* Lookup table. */ | |
7a4bb9c5 DS |
3143 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3144 | { | |
3145 | table = vrf_table (AFI_IP6, safi, 0); | |
3146 | } | |
3147 | else | |
3148 | { | |
3149 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3150 | } | |
41fc2714 DS |
3151 | |
3152 | if (! table) | |
3153 | return 0; | |
3154 | ||
3155 | /* Make sure mask is applied. */ | |
3156 | apply_mask_ipv6 (p); | |
3157 | ||
3158 | /* Set default distance by route type. */ | |
3159 | if (rib->distance == 0) | |
3160 | { | |
3161 | rib->distance = route_info[rib->type].distance; | |
3162 | ||
3163 | /* iBGP distance is 200. */ | |
3164 | if (rib->type == ZEBRA_ROUTE_BGP | |
3165 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
3166 | rib->distance = 200; | |
3167 | } | |
3168 | ||
3169 | /* Lookup route node.*/ | |
3170 | rn = route_node_get (table, (struct prefix *) p); | |
3171 | ||
3172 | /* If same type of route are installed, treat it as a implicit | |
3173 | withdraw. */ | |
3174 | RNODE_FOREACH_RIB (rn, same) { | |
3175 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
3176 | continue; | |
3177 | } | |
3178 | if (same->type != rib->type) { | |
3179 | continue; | |
3180 | } | |
3181 | ||
7c8ff89e DS |
3182 | if (same->instance != rib->instance) { |
3183 | continue; | |
3184 | } | |
3185 | ||
41fc2714 DS |
3186 | if (same->table != rib->table) { |
3187 | continue; | |
3188 | } | |
3189 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
3190 | break; | |
3191 | } | |
3192 | else if ((nexthop = same->nexthop) && | |
3193 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3194 | nexthop->ifindex == ifindex) { | |
3195 | same->refcnt++; | |
3196 | return 0; | |
3197 | } | |
3198 | } | |
3199 | ||
3200 | /* If this route is kernel route, set FIB flag to the route. */ | |
3201 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
3202 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
3203 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3204 | } | |
3205 | } | |
3206 | ||
3207 | /* Link new rib to node.*/ | |
3208 | rib_addnode (rn, rib); | |
3209 | ret = 1; | |
3210 | /* Free implicit route.*/ | |
3211 | if (same) | |
3212 | { | |
3213 | if (IS_ZEBRA_DEBUG_RIB) | |
3214 | { | |
3215 | zlog_debug ("%s: calling rib_delnode (%p, %p) on existing RIB entry", | |
3216 | __func__, rn, same); | |
3217 | rib_dump ((struct prefix *)p, same); | |
3218 | } | |
3219 | rib_delnode (rn, same); | |
3220 | ret = -1; | |
3221 | } | |
3222 | ||
3223 | route_unlock_node (rn); | |
3224 | return ret; | |
3225 | } | |
3226 | ||
ebf1ead0 | 3227 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 3228 | int |
7c8ff89e | 3229 | rib_delete_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
7a4bb9c5 | 3230 | struct in6_addr *gate, unsigned int ifindex, u_int32_t table_id, safi_t safi) |
718e3744 | 3231 | { |
3232 | struct route_table *table; | |
3233 | struct route_node *rn; | |
3234 | struct rib *rib; | |
3235 | struct rib *fib = NULL; | |
3236 | struct rib *same = NULL; | |
fa713d9e CF |
3237 | struct nexthop *nexthop, *tnexthop; |
3238 | int recursing; | |
81cce018 SH |
3239 | char buf1[INET6_ADDRSTRLEN]; |
3240 | char buf2[INET6_ADDRSTRLEN]; | |
718e3744 | 3241 | |
3242 | /* Apply mask. */ | |
3243 | apply_mask_ipv6 (p); | |
3244 | ||
3245 | /* Lookup table. */ | |
7a4bb9c5 DS |
3246 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) |
3247 | { | |
3248 | table = vrf_table (AFI_IP6, safi, 0); | |
3249 | } | |
3250 | else | |
3251 | { | |
3252 | table = vrf_other_route_table(AFI_IP6, table_id, 0); | |
3253 | } | |
718e3744 | 3254 | if (! table) |
3255 | return 0; | |
4d38fdb4 | 3256 | |
718e3744 | 3257 | /* Lookup route node. */ |
3258 | rn = route_node_lookup (table, (struct prefix *) p); | |
3259 | if (! rn) | |
3260 | { | |
3261 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3262 | { | |
3263 | if (gate) | |
b6178002 | 3264 | zlog_debug ("route %s/%d via %s ifindex %d doesn't exist in rib", |
81cce018 | 3265 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3266 | p->prefixlen, |
81cce018 | 3267 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3268 | ifindex); |
3269 | else | |
b6178002 | 3270 | zlog_debug ("route %s/%d ifindex %d doesn't exist in rib", |
81cce018 | 3271 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3272 | p->prefixlen, |
3273 | ifindex); | |
3274 | } | |
3275 | return ZEBRA_ERR_RTNOEXIST; | |
3276 | } | |
3277 | ||
3278 | /* Lookup same type route. */ | |
9fd92e3c | 3279 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3280 | { |
6d691129 PJ |
3281 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
3282 | continue; | |
3283 | ||
718e3744 | 3284 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3285 | fib = rib; | |
3286 | ||
ebf1ead0 | 3287 | if (rib->type != type) |
3288 | continue; | |
7c8ff89e DS |
3289 | if (rib->instance != instance) |
3290 | continue; | |
ebf1ead0 | 3291 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 3292 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 3293 | { |
4f1735fd MF |
3294 | if (nexthop->ifindex != ifindex) |
3295 | continue; | |
ebf1ead0 | 3296 | if (rib->refcnt) |
718e3744 | 3297 | { |
ebf1ead0 | 3298 | rib->refcnt--; |
3299 | route_unlock_node (rn); | |
3300 | route_unlock_node (rn); | |
3301 | return 0; | |
718e3744 | 3302 | } |
ebf1ead0 | 3303 | same = rib; |
3304 | break; | |
718e3744 | 3305 | } |
ebf1ead0 | 3306 | /* Make sure that the route found has the same gateway. */ |
fa713d9e CF |
3307 | else |
3308 | { | |
3309 | if (gate == NULL) | |
3310 | { | |
3311 | same = rib; | |
3312 | break; | |
3313 | } | |
3314 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
3315 | if (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
3316 | { | |
3317 | same = rib; | |
3318 | break; | |
3319 | } | |
3320 | if (same) | |
3321 | break; | |
3322 | } | |
718e3744 | 3323 | } |
3324 | ||
3325 | /* If same type of route can't be found and this message is from | |
3326 | kernel. */ | |
3327 | if (! same) | |
3328 | { | |
2037f143 DS |
3329 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
3330 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
3331 | { | |
3332 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3333 | { | |
3334 | zlog_debug ("Zebra route %s/%d was deleted by others from kernel", | |
3335 | inet_ntop (AF_INET, &p->prefix, buf1, INET_ADDRSTRLEN), | |
3336 | p->prefixlen); | |
3337 | } | |
3338 | /* This means someone else, other than Zebra, has deleted a Zebra | |
3339 | * route from the kernel. We will add it back */ | |
3340 | rib_install_kernel(rn, fib); | |
3341 | } | |
718e3744 | 3342 | else |
3343 | { | |
3344 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3345 | { | |
3346 | if (gate) | |
b6178002 | 3347 | zlog_debug ("route %s/%d via %s ifindex %d type %d doesn't exist in rib", |
81cce018 | 3348 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3349 | p->prefixlen, |
81cce018 | 3350 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3351 | ifindex, |
3352 | type); | |
3353 | else | |
b6178002 | 3354 | zlog_debug ("route %s/%d ifindex %d type %d doesn't exist in rib", |
81cce018 | 3355 | inet_ntop (AF_INET6, &p->prefix, buf1, INET6_ADDRSTRLEN), |
718e3744 | 3356 | p->prefixlen, |
3357 | ifindex, | |
3358 | type); | |
3359 | } | |
3360 | route_unlock_node (rn); | |
3361 | return ZEBRA_ERR_RTNOEXIST; | |
3362 | } | |
3363 | } | |
3364 | ||
718e3744 | 3365 | if (same) |
4d38fdb4 | 3366 | rib_delnode (rn, same); |
3367 | ||
718e3744 | 3368 | route_unlock_node (rn); |
718e3744 | 3369 | return 0; |
3370 | } | |
6b0655a2 | 3371 | |
718e3744 | 3372 | /* Install static route into rib. */ |
a1ac18c4 | 3373 | static void |
718e3744 | 3374 | static_install_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3375 | { | |
3376 | struct rib *rib; | |
3377 | struct route_table *table; | |
3378 | struct route_node *rn; | |
6e26278c | 3379 | struct prefix nh_p; |
718e3744 | 3380 | |
3381 | /* Lookup table. */ | |
3382 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3383 | if (! table) | |
3384 | return; | |
3385 | ||
3386 | /* Lookup existing route */ | |
3387 | rn = route_node_get (table, p); | |
9fd92e3c | 3388 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3389 | { |
3390 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) | |
3391 | continue; | |
3392 | ||
3393 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
3394 | break; | |
3395 | } | |
718e3744 | 3396 | |
3397 | if (rib) | |
3398 | { | |
0d9551dc DS |
3399 | /* if tag value changed , update old value in RIB */ |
3400 | if (rib->tag != si->tag) | |
3401 | rib->tag = si->tag; | |
3402 | ||
718e3744 | 3403 | /* Same distance static route is there. Update it with new |
3404 | nexthop. */ | |
718e3744 | 3405 | route_unlock_node (rn); |
3406 | ||
3407 | switch (si->type) | |
3408 | { | |
3409 | case STATIC_IPV6_GATEWAY: | |
3410 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3411 | nh_p.family = AF_INET6; |
3412 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3413 | nh_p.u.prefix6 = si->ipv6; | |
3414 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3415 | break; |
3416 | case STATIC_IPV6_IFNAME: | |
3417 | nexthop_ifname_add (rib, si->ifname); | |
3418 | break; | |
3419 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3420 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3421 | break; | |
3422 | } | |
3c0755dc | 3423 | rib_queue_add (&zebrad, rn); |
718e3744 | 3424 | } |
3425 | else | |
3426 | { | |
3427 | /* This is new static route. */ | |
4d38fdb4 | 3428 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3429 | ||
718e3744 | 3430 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 3431 | rib->instance = 0; |
718e3744 | 3432 | rib->distance = si->distance; |
3433 | rib->metric = 0; | |
4595531e | 3434 | rib->table = zebrad.rtm_table_default; |
718e3744 | 3435 | rib->nexthop_num = 0; |
0d9551dc | 3436 | rib->tag = si->tag; |
718e3744 | 3437 | |
3438 | switch (si->type) | |
3439 | { | |
3440 | case STATIC_IPV6_GATEWAY: | |
3441 | nexthop_ipv6_add (rib, &si->ipv6); | |
6e26278c DS |
3442 | nh_p.family = AF_INET6; |
3443 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3444 | nh_p.u.prefix6 = si->ipv6; | |
3445 | zebra_register_rnh_static_nh(&nh_p, rn); | |
718e3744 | 3446 | break; |
3447 | case STATIC_IPV6_IFNAME: | |
3448 | nexthop_ifname_add (rib, si->ifname); | |
3449 | break; | |
3450 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3451 | nexthop_ipv6_ifname_add (rib, &si->ipv6, si->ifname); | |
3452 | break; | |
3453 | } | |
3454 | ||
81dfcaa2 | 3455 | /* Save the flags of this static routes (reject, blackhole) */ |
3456 | rib->flags = si->flags; | |
3457 | ||
718e3744 | 3458 | /* Link this rib to the tree. */ |
3459 | rib_addnode (rn, rib); | |
718e3744 | 3460 | } |
3461 | } | |
3462 | ||
a1ac18c4 | 3463 | static int |
718e3744 | 3464 | static_ipv6_nexthop_same (struct nexthop *nexthop, struct static_ipv6 *si) |
3465 | { | |
3466 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
3467 | && si->type == STATIC_IPV6_GATEWAY | |
3468 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6)) | |
3469 | return 1; | |
3470 | if (nexthop->type == NEXTHOP_TYPE_IFNAME | |
3471 | && si->type == STATIC_IPV6_IFNAME | |
3472 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3473 | return 1; | |
3474 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
3475 | && si->type == STATIC_IPV6_GATEWAY_IFNAME | |
3476 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->ipv6) | |
3477 | && strcmp (nexthop->ifname, si->ifname) == 0) | |
3478 | return 1; | |
e8e1946e | 3479 | return 0; |
718e3744 | 3480 | } |
3481 | ||
a1ac18c4 | 3482 | static void |
718e3744 | 3483 | static_uninstall_ipv6 (struct prefix *p, struct static_ipv6 *si) |
3484 | { | |
3485 | struct route_table *table; | |
3486 | struct route_node *rn; | |
3487 | struct rib *rib; | |
3488 | struct nexthop *nexthop; | |
6e26278c | 3489 | struct prefix nh_p; |
718e3744 | 3490 | |
3491 | /* Lookup table. */ | |
3492 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3493 | if (! table) | |
3494 | return; | |
3495 | ||
3496 | /* Lookup existing route with type and distance. */ | |
3497 | rn = route_node_lookup (table, (struct prefix *) p); | |
3498 | if (! rn) | |
3499 | return; | |
3500 | ||
9fd92e3c | 3501 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3502 | { |
3503 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
3504 | continue; | |
3505 | ||
0d9551dc DS |
3506 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
3507 | rib->tag == si->tag) | |
6d691129 PJ |
3508 | break; |
3509 | } | |
3510 | ||
718e3744 | 3511 | if (! rib) |
3512 | { | |
3513 | route_unlock_node (rn); | |
3514 | return; | |
3515 | } | |
3516 | ||
3517 | /* Lookup nexthop. */ | |
3518 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3519 | if (static_ipv6_nexthop_same (nexthop, si)) | |
3520 | break; | |
3521 | ||
3522 | /* Can't find nexthop. */ | |
3523 | if (! nexthop) | |
3524 | { | |
3525 | route_unlock_node (rn); | |
3526 | return; | |
3527 | } | |
3528 | ||
3529 | /* Check nexthop. */ | |
3530 | if (rib->nexthop_num == 1) | |
3531 | { | |
3532 | rib_delnode (rn, rib); | |
718e3744 | 3533 | } |
3534 | else | |
3535 | { | |
6baeb988 | 3536 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
3537 | rib_uninstall (rn, rib); | |
6e26278c DS |
3538 | |
3539 | nh_p.family = AF_INET6; | |
3540 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3541 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
319572cc | 3542 | nexthop_delete (rib, nexthop); |
6e26278c DS |
3543 | zebra_deregister_rnh_static_nh(&nh_p, rn); |
3544 | nexthop_free (nexthop, rn); | |
6d691129 | 3545 | rib_queue_add (&zebrad, rn); |
718e3744 | 3546 | } |
718e3744 | 3547 | /* Unlock node. */ |
3548 | route_unlock_node (rn); | |
3549 | } | |
3550 | ||
3551 | /* Add static route into static route configuration. */ | |
3552 | int | |
3553 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3554 | const char *ifname, u_char flags, u_short tag, |
3555 | u_char distance, u_int32_t vrf_id) | |
718e3744 | 3556 | { |
3557 | struct route_node *rn; | |
3558 | struct static_ipv6 *si; | |
3559 | struct static_ipv6 *pp; | |
3560 | struct static_ipv6 *cp; | |
3561 | struct route_table *stable; | |
3562 | ||
3563 | /* Lookup table. */ | |
3564 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
3565 | if (! stable) | |
3566 | return -1; | |
27b47253 PJ |
3567 | |
3568 | if (!gate && | |
3569 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
3570 | return -1; | |
3571 | ||
3572 | if (!ifname && | |
3573 | (type == STATIC_IPV6_GATEWAY_IFNAME || type == STATIC_IPV6_IFNAME)) | |
3574 | return -1; | |
718e3744 | 3575 | |
3576 | /* Lookup static route prefix. */ | |
3577 | rn = route_node_get (stable, p); | |
3578 | ||
3579 | /* Do nothing if there is a same static route. */ | |
3580 | for (si = rn->info; si; si = si->next) | |
3581 | { | |
3582 | if (distance == si->distance | |
3583 | && type == si->type | |
0d9551dc | 3584 | && tag == si->tag |
718e3744 | 3585 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) |
3586 | && (! ifname || strcmp (ifname, si->ifname) == 0)) | |
3587 | { | |
3588 | route_unlock_node (rn); | |
3589 | return 0; | |
3590 | } | |
3591 | } | |
3592 | ||
3593 | /* Make new static route structure. */ | |
393deb9b | 3594 | si = XCALLOC (MTYPE_STATIC_IPV6, sizeof (struct static_ipv6)); |
718e3744 | 3595 | |
3596 | si->type = type; | |
3597 | si->distance = distance; | |
81dfcaa2 | 3598 | si->flags = flags; |
0d9551dc | 3599 | si->tag = tag; |
718e3744 | 3600 | |
3601 | switch (type) | |
3602 | { | |
3603 | case STATIC_IPV6_GATEWAY: | |
3604 | si->ipv6 = *gate; | |
3605 | break; | |
3606 | case STATIC_IPV6_IFNAME: | |
3607 | si->ifname = XSTRDUP (0, ifname); | |
3608 | break; | |
3609 | case STATIC_IPV6_GATEWAY_IFNAME: | |
3610 | si->ipv6 = *gate; | |
3611 | si->ifname = XSTRDUP (0, ifname); | |
3612 | break; | |
3613 | } | |
3614 | ||
3615 | /* Add new static route information to the tree with sort by | |
3616 | distance value and gateway address. */ | |
3617 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3618 | { | |
3619 | if (si->distance < cp->distance) | |
3620 | break; | |
3621 | if (si->distance > cp->distance) | |
3622 | continue; | |
3623 | } | |
3624 | ||
3625 | /* Make linked list. */ | |
3626 | if (pp) | |
3627 | pp->next = si; | |
3628 | else | |
3629 | rn->info = si; | |
3630 | if (cp) | |
3631 | cp->prev = si; | |
3632 | si->prev = pp; | |
3633 | si->next = cp; | |
3634 | ||
3635 | /* Install into rib. */ | |
3636 | static_install_ipv6 (p, si); | |
3637 | ||
3638 | return 1; | |
3639 | } | |
3640 | ||
3641 | /* Delete static route from static route configuration. */ | |
3642 | int | |
3643 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
0d9551dc DS |
3644 | const char *ifname, u_short tag, u_char distance, |
3645 | u_int32_t vrf_id) | |
718e3744 | 3646 | { |
3647 | struct route_node *rn; | |
3648 | struct static_ipv6 *si; | |
3649 | struct route_table *stable; | |
3650 | ||
3651 | /* Lookup table. */ | |
3652 | stable = vrf_static_table (AFI_IP6, SAFI_UNICAST, vrf_id); | |
3653 | if (! stable) | |
3654 | return -1; | |
3655 | ||
3656 | /* Lookup static route prefix. */ | |
3657 | rn = route_node_lookup (stable, p); | |
3658 | if (! rn) | |
3659 | return 0; | |
3660 | ||
3661 | /* Find same static route is the tree */ | |
3662 | for (si = rn->info; si; si = si->next) | |
3663 | if (distance == si->distance | |
3664 | && type == si->type | |
3665 | && (! gate || IPV6_ADDR_SAME (gate, &si->ipv6)) | |
0d9551dc DS |
3666 | && (! ifname || strcmp (ifname, si->ifname) == 0) |
3667 | && (! tag || (tag == si->tag))) | |
718e3744 | 3668 | break; |
3669 | ||
3670 | /* Can't find static route. */ | |
3671 | if (! si) | |
3672 | { | |
3673 | route_unlock_node (rn); | |
3674 | return 0; | |
3675 | } | |
3676 | ||
3677 | /* Install into rib. */ | |
3678 | static_uninstall_ipv6 (p, si); | |
3679 | ||
3680 | /* Unlink static route from linked list. */ | |
3681 | if (si->prev) | |
3682 | si->prev->next = si->next; | |
3683 | else | |
3684 | rn->info = si->next; | |
3685 | if (si->next) | |
3686 | si->next->prev = si->prev; | |
3687 | ||
3688 | /* Free static route configuration. */ | |
a0f6acd8 | 3689 | if (ifname) |
3690 | XFREE (0, si->ifname); | |
718e3744 | 3691 | XFREE (MTYPE_STATIC_IPV6, si); |
3692 | ||
3693 | return 1; | |
3694 | } | |
3695 | #endif /* HAVE_IPV6 */ | |
6b0655a2 | 3696 | |
718e3744 | 3697 | /* RIB update function. */ |
3698 | void | |
a1ac18c4 | 3699 | rib_update (void) |
718e3744 | 3700 | { |
3701 | struct route_node *rn; | |
3702 | struct route_table *table; | |
4d38fdb4 | 3703 | |
718e3744 | 3704 | table = vrf_table (AFI_IP, SAFI_UNICAST, 0); |
3705 | if (table) | |
3706 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3707 | if (rnode_to_ribs (rn)) |
6d691129 | 3708 | rib_queue_add (&zebrad, rn); |
718e3744 | 3709 | |
3710 | table = vrf_table (AFI_IP6, SAFI_UNICAST, 0); | |
3711 | if (table) | |
3712 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3713 | if (rnode_to_ribs (rn)) |
6d691129 | 3714 | rib_queue_add (&zebrad, rn); |
718e3744 | 3715 | } |
3716 | ||
6b0655a2 | 3717 | |
718e3744 | 3718 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3719 | static void |
718e3744 | 3720 | rib_weed_table (struct route_table *table) |
3721 | { | |
3722 | struct route_node *rn; | |
3723 | struct rib *rib; | |
3724 | struct rib *next; | |
3725 | ||
3726 | if (table) | |
3727 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3728 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3729 | { |
6d691129 PJ |
3730 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3731 | continue; | |
3732 | ||
b21b19c5 | 3733 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3734 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3735 | rib_delnode (rn, rib); |
718e3744 | 3736 | } |
3737 | } | |
3738 | ||
3739 | /* Delete all routes from non main table. */ | |
3740 | void | |
a1ac18c4 | 3741 | rib_weed_tables (void) |
718e3744 | 3742 | { |
3743 | rib_weed_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3744 | rib_weed_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3745 | } | |
6b0655a2 | 3746 | |
718e3744 | 3747 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3748 | static void |
718e3744 | 3749 | rib_sweep_table (struct route_table *table) |
3750 | { | |
3751 | struct route_node *rn; | |
3752 | struct rib *rib; | |
3753 | struct rib *next; | |
3754 | int ret = 0; | |
3755 | ||
3756 | if (table) | |
3757 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3758 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3759 | { |
6d691129 PJ |
3760 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3761 | continue; | |
3762 | ||
718e3744 | 3763 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3764 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3765 | { | |
3766 | ret = rib_uninstall_kernel (rn, rib); | |
3767 | if (! ret) | |
4d38fdb4 | 3768 | rib_delnode (rn, rib); |
718e3744 | 3769 | } |
3770 | } | |
3771 | } | |
3772 | ||
3773 | /* Sweep all RIB tables. */ | |
3774 | void | |
a1ac18c4 | 3775 | rib_sweep_route (void) |
718e3744 | 3776 | { |
3777 | rib_sweep_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3778 | rib_sweep_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3779 | } | |
2ea1ab1c VT |
3780 | |
3781 | /* Remove specific by protocol routes from 'table'. */ | |
3782 | static unsigned long | |
7c8ff89e | 3783 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3784 | { |
3785 | struct route_node *rn; | |
3786 | struct rib *rib; | |
3787 | struct rib *next; | |
3788 | unsigned long n = 0; | |
3789 | ||
3790 | if (table) | |
3791 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3792 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3793 | { |
2ea1ab1c VT |
3794 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3795 | continue; | |
7c8ff89e | 3796 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3797 | { |
3798 | rib_delnode (rn, rib); | |
3799 | n++; | |
3800 | } | |
3801 | } | |
3802 | ||
3803 | return n; | |
3804 | } | |
3805 | ||
3806 | /* Remove specific by protocol routes. */ | |
3807 | unsigned long | |
7c8ff89e | 3808 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3809 | { |
7c8ff89e DS |
3810 | return rib_score_proto_table (proto, instance, vrf_table (AFI_IP, SAFI_UNICAST, 0)) |
3811 | +rib_score_proto_table (proto, instance, vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
2ea1ab1c VT |
3812 | } |
3813 | ||
718e3744 | 3814 | /* Close RIB and clean up kernel routes. */ |
a1ac18c4 | 3815 | static void |
718e3744 | 3816 | rib_close_table (struct route_table *table) |
3817 | { | |
3818 | struct route_node *rn; | |
3819 | struct rib *rib; | |
3820 | ||
3821 | if (table) | |
3822 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3823 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3824 | { |
9fd92e3c AS |
3825 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3826 | continue; | |
3827 | ||
5adc2528 AS |
3828 | zfpm_trigger_update (rn, NULL); |
3829 | ||
9fd92e3c AS |
3830 | if (! RIB_SYSTEM_ROUTE (rib)) |
3831 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3832 | } |
718e3744 | 3833 | } |
3834 | ||
3835 | /* Close all RIB tables. */ | |
3836 | void | |
a1ac18c4 | 3837 | rib_close (void) |
718e3744 | 3838 | { |
3839 | rib_close_table (vrf_table (AFI_IP, SAFI_UNICAST, 0)); | |
3840 | rib_close_table (vrf_table (AFI_IP6, SAFI_UNICAST, 0)); | |
3841 | } | |
6b0655a2 | 3842 | |
718e3744 | 3843 | /* Routing information base initialize. */ |
3844 | void | |
a1ac18c4 | 3845 | rib_init (void) |
718e3744 | 3846 | { |
4d38fdb4 | 3847 | rib_queue_init (&zebrad); |
718e3744 | 3848 | /* VRF initialization. */ |
3849 | vrf_init (); | |
3850 | } | |
0915bb0c AS |
3851 | |
3852 | /* | |
3853 | * vrf_id_get_next | |
3854 | * | |
3855 | * Get the first vrf id that is greater than the given vrf id if any. | |
3856 | * | |
3857 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3858 | */ | |
3859 | static inline int | |
3860 | vrf_id_get_next (uint32_t id, uint32_t *next_id_p) | |
3861 | { | |
3862 | while (++id < vector_active (vrf_vector)) | |
3863 | { | |
3864 | if (vrf_lookup (id)) | |
3865 | { | |
3866 | *next_id_p = id; | |
3867 | return 1; | |
3868 | } | |
3869 | } | |
3870 | ||
3871 | return 0; | |
3872 | } | |
3873 | ||
3874 | /* | |
3875 | * rib_tables_iter_next | |
3876 | * | |
3877 | * Returns the next table in the iteration. | |
3878 | */ | |
3879 | struct route_table * | |
3880 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
3881 | { | |
3882 | struct route_table *table; | |
3883 | ||
3884 | /* | |
3885 | * Array that helps us go over all AFI/SAFI combinations via one | |
3886 | * index. | |
3887 | */ | |
3888 | static struct { | |
3889 | afi_t afi; | |
3890 | safi_t safi; | |
3891 | } afi_safis[] = { | |
3892 | { AFI_IP, SAFI_UNICAST }, | |
3893 | { AFI_IP, SAFI_MULTICAST }, | |
3894 | { AFI_IP6, SAFI_UNICAST }, | |
3895 | { AFI_IP6, SAFI_MULTICAST }, | |
3896 | }; | |
3897 | ||
3898 | table = NULL; | |
3899 | ||
3900 | switch (iter->state) | |
3901 | { | |
3902 | ||
3903 | case RIB_TABLES_ITER_S_INIT: | |
3904 | iter->vrf_id = 0; | |
3905 | iter->afi_safi_ix = -1; | |
3906 | ||
3907 | /* Fall through */ | |
3908 | ||
3909 | case RIB_TABLES_ITER_S_ITERATING: | |
3910 | iter->afi_safi_ix++; | |
3911 | while (1) | |
3912 | { | |
3913 | ||
3914 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
3915 | { | |
3916 | table = vrf_table (afi_safis[iter->afi_safi_ix].afi, | |
3917 | afi_safis[iter->afi_safi_ix].safi, | |
3918 | iter->vrf_id); | |
3919 | if (table) | |
3920 | break; | |
3921 | ||
3922 | iter->afi_safi_ix++; | |
3923 | } | |
3924 | ||
3925 | /* | |
3926 | * Found another table in this vrf. | |
3927 | */ | |
3928 | if (table) | |
3929 | break; | |
3930 | ||
3931 | /* | |
3932 | * Done with all tables in the current vrf, go to the next | |
3933 | * one. | |
3934 | */ | |
3935 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
3936 | break; | |
3937 | ||
3938 | iter->afi_safi_ix = 0; | |
3939 | } | |
3940 | ||
3941 | break; | |
3942 | ||
3943 | case RIB_TABLES_ITER_S_DONE: | |
3944 | return NULL; | |
3945 | } | |
3946 | ||
3947 | if (table) | |
3948 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3949 | else | |
3950 | iter->state = RIB_TABLES_ITER_S_DONE; | |
3951 | ||
3952 | return table; | |
3953 | } |