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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 | ||
b892f1dd | 24 | #include "if.h" |
718e3744 | 25 | #include "prefix.h" |
26 | #include "table.h" | |
27 | #include "memory.h" | |
4a1ab8e4 | 28 | #include "zebra_memory.h" |
718e3744 | 29 | #include "str.h" |
30 | #include "command.h" | |
718e3744 | 31 | #include "log.h" |
32 | #include "sockunion.h" | |
4d38fdb4 | 33 | #include "linklist.h" |
34 | #include "thread.h" | |
35 | #include "workqueue.h" | |
7514fb77 PJ |
36 | #include "prefix.h" |
37 | #include "routemap.h" | |
fb018d25 | 38 | #include "nexthop.h" |
b72ede27 | 39 | #include "vrf.h" |
40c7bdb0 | 40 | #include "mpls.h" |
718e3744 | 41 | |
42 | #include "zebra/rib.h" | |
43 | #include "zebra/rt.h" | |
7c551956 | 44 | #include "zebra/zebra_ns.h" |
718e3744 | 45 | #include "zebra/zserv.h" |
7c551956 | 46 | #include "zebra/zebra_vrf.h" |
718e3744 | 47 | #include "zebra/redistribute.h" |
8902474b | 48 | #include "zebra/zebra_routemap.h" |
718e3744 | 49 | #include "zebra/debug.h" |
5adc2528 | 50 | #include "zebra/zebra_fpm.h" |
fb018d25 | 51 | #include "zebra/zebra_rnh.h" |
88177fe3 | 52 | #include "zebra/interface.h" |
d44ca835 | 53 | #include "zebra/connected.h" |
718e3744 | 54 | |
6baf7bb8 DS |
55 | /* Should we allow non Quagga processes to delete our routes */ |
56 | extern int allow_delete; | |
57 | ||
457eb9af PJ |
58 | /* Hold time for RIB process, should be very minimal. |
59 | * it is useful to able to set it otherwise for testing, hence exported | |
60 | * as global here for test-rig code. | |
61 | */ | |
62 | int rib_process_hold_time = 10; | |
63 | ||
718e3744 | 64 | /* Each route type's string and default distance value. */ |
d145bc00 | 65 | static const struct |
718e3744 | 66 | { |
67 | int key; | |
68 | int distance; | |
5734509c | 69 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 70 | { |
5734509c PJ |
71 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
72 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
73 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
74 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
75 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
76 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
77 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
78 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
79 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
80 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
7052f228 | 81 | /* no entry/default: 150 */ |
718e3744 | 82 | }; |
6b0655a2 | 83 | |
4623d897 DL |
84 | /* RPF lookup behaviour */ |
85 | static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; | |
86 | ||
6c4f4e6e DL |
87 | |
88 | static void __attribute__((format (printf, 5, 6))) | |
2263a412 DL |
89 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, int priority, |
90 | const char *msgfmt, ...) | |
91 | { | |
35d921cc | 92 | char buf[PREFIX_STRLEN + 8]; |
2263a412 DL |
93 | char msgbuf[512]; |
94 | va_list ap; | |
95 | ||
96 | va_start(ap, msgfmt); | |
97 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
98 | va_end(ap); | |
99 | ||
100 | if (rn) | |
101 | { | |
cb653491 DL |
102 | rib_table_info_t *info = rn->table->info; |
103 | ||
35d921cc TT |
104 | prefix2str(&rn->p, buf, sizeof(buf)); |
105 | if (info->safi == SAFI_MULTICAST) | |
106 | strcat(buf, " (MRIB)"); | |
2263a412 DL |
107 | } |
108 | else | |
109 | { | |
110 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
111 | } | |
112 | ||
113 | zlog (NULL, priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); | |
114 | } | |
115 | ||
116 | #define rnode_debug(node, vrf_id, ...) \ | |
117 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) | |
118 | #define rnode_info(node, ...) \ | |
119 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) | |
120 | ||
40c7bdb0 | 121 | u_char |
122 | route_distance (int type) | |
123 | { | |
124 | u_char distance; | |
125 | ||
126 | if ((unsigned)type >= array_size(route_info)) | |
127 | distance = 150; | |
128 | else | |
129 | distance = route_info[type].distance; | |
130 | ||
131 | return distance; | |
132 | } | |
133 | ||
7a4bb9c5 DS |
134 | int |
135 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
136 | { | |
8f500a1c RW |
137 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX)) |
138 | return 0; | |
139 | ||
140 | #ifdef linux | |
141 | if ((table_id == RT_TABLE_UNSPEC) || | |
7a4bb9c5 DS |
142 | (table_id == RT_TABLE_LOCAL) || |
143 | (table_id == RT_TABLE_COMPAT)) | |
144 | return 0; | |
8f500a1c RW |
145 | #endif |
146 | ||
147 | return 1; | |
7a4bb9c5 DS |
148 | } |
149 | ||
150 | int | |
151 | is_zebra_main_routing_table(u_int32_t table_id) | |
152 | { | |
153 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
154 | return 1; | |
155 | return 0; | |
156 | } | |
157 | ||
0aabccc0 DD |
158 | int |
159 | zebra_check_addr (struct prefix *p) | |
160 | { | |
161 | if (p->family == AF_INET) | |
162 | { | |
163 | u_int32_t addr; | |
164 | ||
165 | addr = p->u.prefix4.s_addr; | |
166 | addr = ntohl (addr); | |
167 | ||
168 | if (IPV4_NET127 (addr) | |
169 | || IN_CLASSD (addr) | |
170 | || IPV4_LINKLOCAL(addr)) | |
171 | return 0; | |
172 | } | |
0aabccc0 DD |
173 | if (p->family == AF_INET6) |
174 | { | |
175 | if (IN6_IS_ADDR_LOOPBACK (&p->u.prefix6)) | |
176 | return 0; | |
177 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
178 | return 0; | |
179 | } | |
0aabccc0 DD |
180 | return 1; |
181 | } | |
182 | ||
fa713d9e | 183 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 184 | void |
a399694f | 185 | rib_nexthop_add (struct rib *rib, struct nexthop *nexthop) |
fa713d9e | 186 | { |
a399694f | 187 | nexthop_add(&rib->nexthop, nexthop); |
718e3744 | 188 | rib->nexthop_num++; |
189 | } | |
190 | ||
6e26278c | 191 | |
6e26278c DS |
192 | |
193 | /** | |
194 | * copy_nexthop - copy a nexthop to the rib structure. | |
195 | */ | |
196 | void | |
a399694f | 197 | rib_copy_nexthops (struct rib *rib, struct nexthop *nh) |
6e26278c DS |
198 | { |
199 | struct nexthop *nexthop; | |
200 | ||
201 | nexthop = nexthop_new(); | |
202 | nexthop->flags = nh->flags; | |
203 | nexthop->type = nh->type; | |
204 | nexthop->ifindex = nh->ifindex; | |
6e26278c DS |
205 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); |
206 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
c0f4be83 | 207 | if (nh->nh_label) |
ce549947 | 208 | nexthop_add_labels (nexthop, nh->nh_label_type, nh->nh_label->num_labels, |
c0f4be83 | 209 | &nh->nh_label->label[0]); |
a399694f | 210 | rib_nexthop_add(rib, nexthop); |
6e26278c | 211 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) |
a399694f | 212 | copy_nexthops(&nexthop->resolved, nh->resolved); |
6e26278c DS |
213 | } |
214 | ||
718e3744 | 215 | /* Delete specified nexthop from the list. */ |
28f6dde8 | 216 | void |
a399694f | 217 | rib_nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
718e3744 | 218 | { |
219 | if (nexthop->next) | |
220 | nexthop->next->prev = nexthop->prev; | |
221 | if (nexthop->prev) | |
222 | nexthop->prev->next = nexthop->next; | |
223 | else | |
224 | rib->nexthop = nexthop->next; | |
225 | rib->nexthop_num--; | |
226 | } | |
227 | ||
fa713d9e | 228 | |
fa713d9e | 229 | |
718e3744 | 230 | struct nexthop * |
b892f1dd | 231 | rib_nexthop_ifindex_add (struct rib *rib, ifindex_t ifindex) |
718e3744 | 232 | { |
233 | struct nexthop *nexthop; | |
234 | ||
a399694f | 235 | nexthop = nexthop_new(); |
718e3744 | 236 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
237 | nexthop->ifindex = ifindex; | |
238 | ||
a399694f | 239 | rib_nexthop_add (rib, nexthop); |
718e3744 | 240 | |
241 | return nexthop; | |
242 | } | |
243 | ||
718e3744 | 244 | struct nexthop * |
a399694f | 245 | rib_nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 246 | { |
247 | struct nexthop *nexthop; | |
248 | ||
a399694f | 249 | nexthop = nexthop_new(); |
718e3744 | 250 | nexthop->type = NEXTHOP_TYPE_IPV4; |
251 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
252 | if (src) |
253 | nexthop->src.ipv4 = *src; | |
718e3744 | 254 | |
a399694f | 255 | rib_nexthop_add (rib, nexthop); |
718e3744 | 256 | |
257 | return nexthop; | |
258 | } | |
259 | ||
26e2ae36 | 260 | struct nexthop * |
a399694f | 261 | rib_nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
b892f1dd | 262 | struct in_addr *src, ifindex_t ifindex) |
718e3744 | 263 | { |
264 | struct nexthop *nexthop; | |
d44ca835 | 265 | struct interface *ifp; |
718e3744 | 266 | |
a399694f | 267 | nexthop = nexthop_new(); |
718e3744 | 268 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
269 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
270 | if (src) |
271 | nexthop->src.ipv4 = *src; | |
718e3744 | 272 | nexthop->ifindex = ifindex; |
d44ca835 | 273 | ifp = if_lookup_by_index (nexthop->ifindex); |
12f6fb97 DS |
274 | /*Pending: need to think if null ifp here is ok during bootup? |
275 | There was a crash because ifp here was coming to be NULL */ | |
276 | if (ifp) | |
d44ca835 DS |
277 | if (connected_is_unnumbered(ifp)) { |
278 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
279 | } | |
718e3744 | 280 | |
a399694f | 281 | rib_nexthop_add (rib, nexthop); |
718e3744 | 282 | |
283 | return nexthop; | |
284 | } | |
285 | ||
718e3744 | 286 | struct nexthop * |
a399694f | 287 | rib_nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) |
718e3744 | 288 | { |
289 | struct nexthop *nexthop; | |
290 | ||
a399694f | 291 | nexthop = nexthop_new(); |
718e3744 | 292 | nexthop->type = NEXTHOP_TYPE_IPV6; |
293 | nexthop->gate.ipv6 = *ipv6; | |
294 | ||
a399694f | 295 | rib_nexthop_add (rib, nexthop); |
718e3744 | 296 | |
297 | return nexthop; | |
298 | } | |
299 | ||
41fc2714 | 300 | struct nexthop * |
a399694f | 301 | rib_nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
b892f1dd | 302 | ifindex_t ifindex) |
718e3744 | 303 | { |
304 | struct nexthop *nexthop; | |
305 | ||
4a1ab8e4 | 306 | nexthop = nexthop_new(); |
718e3744 | 307 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
308 | nexthop->gate.ipv6 = *ipv6; | |
309 | nexthop->ifindex = ifindex; | |
310 | ||
a399694f | 311 | rib_nexthop_add (rib, nexthop); |
718e3744 | 312 | |
313 | return nexthop; | |
314 | } | |
718e3744 | 315 | |
595db7f1 | 316 | struct nexthop * |
a399694f | 317 | rib_nexthop_blackhole_add (struct rib *rib) |
595db7f1 | 318 | { |
319 | struct nexthop *nexthop; | |
320 | ||
a399694f | 321 | nexthop = nexthop_new(); |
595db7f1 | 322 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
323 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
324 | ||
a399694f | 325 | rib_nexthop_add (rib, nexthop); |
595db7f1 | 326 | |
327 | return nexthop; | |
328 | } | |
329 | ||
fa713d9e CF |
330 | /* This method checks whether a recursive nexthop has at |
331 | * least one resolved nexthop in the fib. | |
332 | */ | |
333 | int | |
334 | nexthop_has_fib_child(struct nexthop *nexthop) | |
335 | { | |
336 | struct nexthop *nh; | |
337 | ||
338 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
339 | return 0; | |
340 | ||
341 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
342 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
343 | return 1; | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
718e3744 | 348 | /* If force flag is not set, do not modify falgs at all for uninstall |
349 | the route from FIB. */ | |
a1ac18c4 | 350 | static int |
718e3744 | 351 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
352 | struct route_node *top) | |
353 | { | |
354 | struct prefix_ipv4 p; | |
355 | struct route_table *table; | |
356 | struct route_node *rn; | |
357 | struct rib *match; | |
fa713d9e | 358 | int resolved; |
6e26278c | 359 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 360 | struct nexthop *resolved_hop; |
6e26278c | 361 | int recursing = 0; |
c8a1cb5c | 362 | struct interface *ifp; |
718e3744 | 363 | |
364 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
365 | nexthop->ifindex = 0; | |
366 | ||
367 | if (set) | |
fa713d9e CF |
368 | { |
369 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 370 | zebra_deregister_rnh_static_nexthops(rib->vrf_id, nexthop->resolved, top); |
a399694f | 371 | nexthops_free(nexthop->resolved); |
fa713d9e | 372 | nexthop->resolved = NULL; |
c50ca33a | 373 | rib->nexthop_mtu = 0; |
fa713d9e | 374 | } |
718e3744 | 375 | |
6e26278c DS |
376 | /* Skip nexthops that have been filtered out due to route-map */ |
377 | /* The nexthops are specific to this route and so the same */ | |
378 | /* nexthop for a different route may not have this flag set */ | |
379 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
380 | return 0; | |
381 | ||
d44ca835 DS |
382 | /* |
383 | * Check to see if we should trust the passed in information | |
384 | * for UNNUMBERED interfaces as that we won't find the GW | |
385 | * address in the routing table. | |
c8a1cb5c DS |
386 | */ |
387 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
388 | { | |
389 | ifp = if_lookup_by_index (nexthop->ifindex); | |
d44ca835 DS |
390 | if (ifp && connected_is_unnumbered(ifp)) |
391 | { | |
392 | if (if_is_operative(ifp)) | |
393 | return 1; | |
394 | else | |
395 | return 0; | |
396 | } | |
c8a1cb5c DS |
397 | else |
398 | return 0; | |
399 | } | |
400 | ||
718e3744 | 401 | /* Make lookup prefix. */ |
402 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
403 | p.family = AF_INET; | |
404 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
405 | p.prefix = nexthop->gate.ipv4; | |
406 | ||
407 | /* Lookup table. */ | |
78104b9b | 408 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 409 | if (! table) |
410 | return 0; | |
411 | ||
412 | rn = route_node_match (table, (struct prefix *) &p); | |
413 | while (rn) | |
414 | { | |
415 | route_unlock_node (rn); | |
416 | ||
a50c107e | 417 | /* If lookup self prefix return immediately. */ |
718e3744 | 418 | if (rn == top) |
419 | return 0; | |
420 | ||
421 | /* Pick up selected route. */ | |
18ff3edd DS |
422 | /* However, do not resolve over default route unless explicitly allowed. */ |
423 | if (is_default_prefix (&rn->p) && | |
424 | !nh_resolve_via_default (p.family)) | |
425 | return 0; | |
426 | ||
9fd92e3c | 427 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
428 | { |
429 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
430 | continue; | |
633e504d DS |
431 | |
432 | /* if the next hop is imported from another table, skip it */ | |
433 | if (match->type == ZEBRA_ROUTE_TABLE) | |
434 | continue; | |
16814f96 SH |
435 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
436 | break; | |
437 | } | |
718e3744 | 438 | |
439 | /* If there is no selected route or matched route is EGP, go up | |
440 | tree. */ | |
6e26278c | 441 | if (! match) |
718e3744 | 442 | { |
443 | do { | |
444 | rn = rn->parent; | |
445 | } while (rn && rn->info == NULL); | |
446 | if (rn) | |
447 | route_lock_node (rn); | |
448 | } | |
449 | else | |
450 | { | |
48a53dc7 CF |
451 | /* If the longest prefix match for the nexthop yields |
452 | * a blackhole, mark it as inactive. */ | |
453 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
454 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
455 | return 0; | |
456 | ||
718e3744 | 457 | if (match->type == ZEBRA_ROUTE_CONNECT) |
458 | { | |
459 | /* Directly point connected route. */ | |
460 | newhop = match->nexthop; | |
461 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
462 | nexthop->ifindex = newhop->ifindex; | |
463 | ||
464 | return 1; | |
465 | } | |
22afbf94 | 466 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
718e3744 | 467 | { |
fa713d9e | 468 | resolved = 0; |
718e3744 | 469 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
470 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
471 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
472 | { | |
473 | if (set) | |
474 | { | |
475 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 476 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e | 477 | |
4a1ab8e4 | 478 | resolved_hop = nexthop_new(); |
fa713d9e | 479 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
c3e6b595 CF |
480 | /* If the resolving route specifies a gateway, use it */ |
481 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 482 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
c3e6b595 CF |
483 | { |
484 | resolved_hop->type = newhop->type; | |
485 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
486 | ||
487 | if (newhop->ifindex) | |
488 | { | |
489 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
490 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
491 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
492 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
493 | } |
494 | } | |
495 | ||
496 | /* If the resolving route is an interface route, | |
497 | * it means the gateway we are looking up is connected | |
498 | * to that interface. (The actual network is _not_ onlink). | |
499 | * Therefore, the resolved route should have the original | |
500 | * gateway as nexthop as it is directly connected. | |
501 | * | |
502 | * On Linux, we have to set the onlink netlink flag because | |
503 | * otherwise, the kernel won't accept the route. */ | |
3ee39b5b | 504 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
505 | { |
506 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
507 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
508 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
509 | resolved_hop->ifindex = newhop->ifindex; | |
510 | } | |
fa713d9e | 511 | |
a399694f | 512 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
513 | } |
514 | resolved = 1; | |
515 | } | |
516 | return resolved; | |
517 | } | |
518 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
519 | { | |
520 | resolved = 0; | |
521 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
522 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
523 | { | |
524 | if (set) | |
525 | { | |
526 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
527 | ||
4a1ab8e4 | 528 | resolved_hop = nexthop_new(); |
6e26278c DS |
529 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
530 | /* If the resolving route specifies a gateway, use it */ | |
531 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 532 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
6e26278c DS |
533 | { |
534 | resolved_hop->type = newhop->type; | |
535 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
536 | ||
537 | if (newhop->ifindex) | |
538 | { | |
539 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
540 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
541 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
542 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
543 | } |
544 | } | |
545 | ||
546 | /* If the resolving route is an interface route, | |
547 | * it means the gateway we are looking up is connected | |
548 | * to that interface. (The actual network is _not_ onlink). | |
549 | * Therefore, the resolved route should have the original | |
550 | * gateway as nexthop as it is directly connected. | |
551 | * | |
552 | * On Linux, we have to set the onlink netlink flag because | |
553 | * otherwise, the kernel won't accept the route. | |
554 | */ | |
3ee39b5b | 555 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
556 | { |
557 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
558 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
559 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
560 | resolved_hop->ifindex = newhop->ifindex; | |
561 | } | |
562 | ||
a399694f | 563 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 564 | } |
fa713d9e | 565 | resolved = 1; |
718e3744 | 566 | } |
c50ca33a TT |
567 | if (resolved && set) |
568 | rib->nexthop_mtu = match->mtu; | |
fa713d9e | 569 | return resolved; |
718e3744 | 570 | } |
571 | else | |
572 | { | |
573 | return 0; | |
574 | } | |
575 | } | |
576 | } | |
577 | return 0; | |
578 | } | |
579 | ||
718e3744 | 580 | /* If force flag is not set, do not modify falgs at all for uninstall |
581 | the route from FIB. */ | |
a1ac18c4 | 582 | static int |
718e3744 | 583 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
584 | struct route_node *top) | |
585 | { | |
586 | struct prefix_ipv6 p; | |
587 | struct route_table *table; | |
588 | struct route_node *rn; | |
589 | struct rib *match; | |
fa713d9e | 590 | int resolved; |
6e26278c DS |
591 | struct nexthop *newhop, *tnewhop; |
592 | int recursing = 0; | |
fa713d9e | 593 | struct nexthop *resolved_hop; |
718e3744 | 594 | |
595 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
596 | nexthop->ifindex = 0; | |
597 | ||
598 | if (set) | |
fa713d9e CF |
599 | { |
600 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 601 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, nexthop->resolved, top); |
a399694f | 602 | nexthops_free(nexthop->resolved); |
fa713d9e CF |
603 | nexthop->resolved = NULL; |
604 | } | |
718e3744 | 605 | |
6e26278c DS |
606 | /* Skip nexthops that have been filtered out due to route-map */ |
607 | /* The nexthops are specific to this route and so the same */ | |
608 | /* nexthop for a different route may not have this flag set */ | |
609 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
610 | return 0; | |
611 | ||
718e3744 | 612 | /* Make lookup prefix. */ |
613 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
614 | p.family = AF_INET6; | |
615 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
616 | p.prefix = nexthop->gate.ipv6; | |
617 | ||
618 | /* Lookup table. */ | |
78104b9b | 619 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 620 | if (! table) |
621 | return 0; | |
622 | ||
623 | rn = route_node_match (table, (struct prefix *) &p); | |
624 | while (rn) | |
625 | { | |
626 | route_unlock_node (rn); | |
627 | ||
a50c107e | 628 | /* If lookup self prefix return immediately. */ |
718e3744 | 629 | if (rn == top) |
630 | return 0; | |
631 | ||
632 | /* Pick up selected route. */ | |
18ff3edd DS |
633 | /* However, do not resolve over default route unless explicitly allowed. */ |
634 | if (is_default_prefix (&rn->p) && | |
635 | !nh_resolve_via_default (p.family)) | |
636 | return 0; | |
637 | ||
9fd92e3c | 638 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
639 | { |
640 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
641 | continue; | |
642 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
643 | break; | |
644 | } | |
718e3744 | 645 | |
646 | /* If there is no selected route or matched route is EGP, go up | |
647 | tree. */ | |
6e26278c | 648 | if (! match) |
718e3744 | 649 | { |
650 | do { | |
651 | rn = rn->parent; | |
652 | } while (rn && rn->info == NULL); | |
653 | if (rn) | |
654 | route_lock_node (rn); | |
655 | } | |
656 | else | |
657 | { | |
48a53dc7 CF |
658 | /* If the longest prefix match for the nexthop yields |
659 | * a blackhole, mark it as inactive. */ | |
660 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
661 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
662 | return 0; | |
663 | ||
718e3744 | 664 | if (match->type == ZEBRA_ROUTE_CONNECT) |
665 | { | |
666 | /* Directly point connected route. */ | |
667 | newhop = match->nexthop; | |
668 | ||
669 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
670 | nexthop->ifindex = newhop->ifindex; | |
671 | ||
672 | return 1; | |
673 | } | |
674 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
675 | { | |
fa713d9e | 676 | resolved = 0; |
718e3744 | 677 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
678 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
679 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
680 | { |
681 | if (set) | |
682 | { | |
683 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
684 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
685 | ||
4a1ab8e4 | 686 | resolved_hop = nexthop_new(); |
6e26278c DS |
687 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
688 | /* See nexthop_active_ipv4 for a description how the | |
689 | * resolved nexthop is constructed. */ | |
690 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
3ee39b5b | 691 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
6e26278c DS |
692 | { |
693 | resolved_hop->type = newhop->type; | |
694 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
695 | ||
696 | if (newhop->ifindex) | |
697 | { | |
698 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
699 | resolved_hop->ifindex = newhop->ifindex; | |
700 | } | |
701 | } | |
702 | ||
3ee39b5b | 703 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
704 | { |
705 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
706 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
707 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
708 | resolved_hop->ifindex = newhop->ifindex; | |
709 | } | |
710 | ||
a399694f | 711 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
712 | } |
713 | resolved = 1; | |
714 | } | |
715 | return resolved; | |
716 | } | |
717 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
718 | { | |
719 | resolved = 0; | |
720 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
721 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 722 | { |
723 | if (set) | |
724 | { | |
725 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e | 726 | |
4a1ab8e4 | 727 | resolved_hop = nexthop_new(); |
fa713d9e | 728 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
c3e6b595 CF |
729 | /* See nexthop_active_ipv4 for a description how the |
730 | * resolved nexthop is constructed. */ | |
718e3744 | 731 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
3ee39b5b | 732 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
c3e6b595 CF |
733 | { |
734 | resolved_hop->type = newhop->type; | |
735 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
736 | ||
737 | if (newhop->ifindex) | |
738 | { | |
739 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
740 | resolved_hop->ifindex = newhop->ifindex; | |
741 | } | |
742 | } | |
fa713d9e | 743 | |
3ee39b5b | 744 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
745 | { |
746 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
747 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
748 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
749 | resolved_hop->ifindex = newhop->ifindex; | |
750 | } | |
fa713d9e | 751 | |
a399694f | 752 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 753 | } |
fa713d9e | 754 | resolved = 1; |
718e3744 | 755 | } |
fa713d9e | 756 | return resolved; |
718e3744 | 757 | } |
758 | else | |
759 | { | |
760 | return 0; | |
761 | } | |
762 | } | |
763 | } | |
764 | return 0; | |
765 | } | |
718e3744 | 766 | |
767 | struct rib * | |
14364a31 DS |
768 | rib_match (afi_t afi, safi_t safi, vrf_id_t vrf_id, |
769 | union g_addr *addr, struct route_node **rn_out) | |
718e3744 | 770 | { |
14364a31 | 771 | struct prefix p; |
718e3744 | 772 | struct route_table *table; |
773 | struct route_node *rn; | |
774 | struct rib *match; | |
fa713d9e CF |
775 | struct nexthop *newhop, *tnewhop; |
776 | int recursing; | |
718e3744 | 777 | |
778 | /* Lookup table. */ | |
14364a31 | 779 | table = zebra_vrf_table (afi, safi, vrf_id); |
718e3744 | 780 | if (! table) |
781 | return 0; | |
782 | ||
14364a31 DS |
783 | memset (&p, 0, sizeof (struct prefix)); |
784 | p.family = afi; | |
14364a31 | 785 | if (afi == AFI_IP) |
d71f1c4e DS |
786 | { |
787 | p.u.prefix4 = addr->ipv4; | |
788 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
789 | } | |
14364a31 | 790 | else |
d71f1c4e DS |
791 | { |
792 | p.u.prefix6 = addr->ipv6; | |
793 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
794 | } | |
718e3744 | 795 | |
796 | rn = route_node_match (table, (struct prefix *) &p); | |
797 | ||
798 | while (rn) | |
799 | { | |
800 | route_unlock_node (rn); | |
801 | ||
802 | /* Pick up selected route. */ | |
9fd92e3c | 803 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
804 | { |
805 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
806 | continue; | |
807 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
808 | break; | |
809 | } | |
718e3744 | 810 | |
811 | /* If there is no selected route or matched route is EGP, go up | |
812 | tree. */ | |
6e26278c | 813 | if (! match) |
718e3744 | 814 | { |
815 | do { | |
816 | rn = rn->parent; | |
817 | } while (rn && rn->info == NULL); | |
818 | if (rn) | |
819 | route_lock_node (rn); | |
820 | } | |
821 | else | |
822 | { | |
33550aa8 | 823 | if (match->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 824 | { |
33550aa8 | 825 | int found = 0; |
fa713d9e | 826 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 827 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
33550aa8 DL |
828 | { |
829 | found = 1; | |
830 | break; | |
831 | } | |
832 | if (!found) | |
833 | return NULL; | |
718e3744 | 834 | } |
33550aa8 DL |
835 | |
836 | if (rn_out) | |
837 | *rn_out = rn; | |
838 | return match; | |
718e3744 | 839 | } |
840 | } | |
841 | return NULL; | |
842 | } | |
843 | ||
4623d897 | 844 | struct rib * |
f86a2b82 | 845 | rib_match_ipv4_multicast (vrf_id_t vrf_id, struct in_addr addr, struct route_node **rn_out) |
4623d897 DL |
846 | { |
847 | struct rib *rib = NULL, *mrib = NULL, *urib = NULL; | |
848 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
14364a31 | 849 | union g_addr gaddr = { .ipv4 = addr }; |
4623d897 DL |
850 | |
851 | switch (ipv4_multicast_mode) | |
852 | { | |
853 | case MCAST_MRIB_ONLY: | |
f86a2b82 | 854 | return rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, rn_out); |
4623d897 | 855 | case MCAST_URIB_ONLY: |
f86a2b82 | 856 | return rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); |
4623d897 DL |
857 | case MCAST_NO_CONFIG: |
858 | case MCAST_MIX_MRIB_FIRST: | |
f86a2b82 | 859 | rib = mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
4623d897 | 860 | if (!mrib) |
f86a2b82 | 861 | rib = urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); |
4623d897 DL |
862 | break; |
863 | case MCAST_MIX_DISTANCE: | |
f86a2b82 DS |
864 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
865 | urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
4623d897 DL |
866 | if (mrib && urib) |
867 | rib = urib->distance < mrib->distance ? urib : mrib; | |
868 | else if (mrib) | |
869 | rib = mrib; | |
870 | else if (urib) | |
871 | rib = urib; | |
872 | break; | |
873 | case MCAST_MIX_PFXLEN: | |
f86a2b82 DS |
874 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
875 | urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
4623d897 DL |
876 | if (mrib && urib) |
877 | rib = u_rn->p.prefixlen > m_rn->p.prefixlen ? urib : mrib; | |
878 | else if (mrib) | |
879 | rib = mrib; | |
880 | else if (urib) | |
881 | rib = urib; | |
882 | break; | |
883 | } | |
884 | ||
885 | if (rn_out) | |
886 | *rn_out = (rib == mrib) ? m_rn : u_rn; | |
887 | ||
888 | if (IS_ZEBRA_DEBUG_RIB) | |
889 | { | |
890 | char buf[BUFSIZ]; | |
891 | inet_ntop (AF_INET, &addr, buf, BUFSIZ); | |
892 | ||
893 | zlog_debug("%s: %s: found %s, using %s", | |
894 | __func__, buf, | |
895 | mrib ? (urib ? "MRIB+URIB" : "MRIB") : | |
896 | urib ? "URIB" : "nothing", | |
897 | rib == urib ? "URIB" : rib == mrib ? "MRIB" : "none"); | |
898 | } | |
899 | return rib; | |
900 | } | |
901 | ||
902 | void | |
903 | multicast_mode_ipv4_set (enum multicast_mode mode) | |
904 | { | |
905 | if (IS_ZEBRA_DEBUG_RIB) | |
906 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, mode); | |
907 | ipv4_multicast_mode = mode; | |
908 | } | |
909 | ||
910 | enum multicast_mode | |
911 | multicast_mode_ipv4_get (void) | |
912 | { | |
913 | return ipv4_multicast_mode; | |
914 | } | |
915 | ||
718e3744 | 916 | struct rib * |
78104b9b | 917 | rib_lookup_ipv4 (struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 918 | { |
919 | struct route_table *table; | |
920 | struct route_node *rn; | |
921 | struct rib *match; | |
fa713d9e CF |
922 | struct nexthop *nexthop, *tnexthop; |
923 | int recursing; | |
718e3744 | 924 | |
925 | /* Lookup table. */ | |
78104b9b | 926 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 927 | if (! table) |
928 | return 0; | |
929 | ||
930 | rn = route_node_lookup (table, (struct prefix *) p); | |
931 | ||
932 | /* No route for this prefix. */ | |
933 | if (! rn) | |
934 | return NULL; | |
935 | ||
936 | /* Unlock node. */ | |
937 | route_unlock_node (rn); | |
938 | ||
9fd92e3c | 939 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
940 | { |
941 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
942 | continue; | |
943 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
944 | break; | |
945 | } | |
718e3744 | 946 | |
6e26278c | 947 | if (! match) |
718e3744 | 948 | return NULL; |
949 | ||
950 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
951 | return match; | |
952 | ||
fa713d9e | 953 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 954 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
955 | return match; | |
956 | ||
957 | return NULL; | |
958 | } | |
959 | ||
dc95824a DO |
960 | /* |
961 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
962 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
963 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
964 | * | |
965 | * Return values: | |
966 | * -1: error | |
967 | * 0: exact match found | |
968 | * 1: a match was found with a different gate | |
969 | * 2: connected route found | |
970 | * 3: no matches found | |
971 | */ | |
972 | int | |
78104b9b FL |
973 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate, |
974 | vrf_id_t vrf_id) | |
dc95824a DO |
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; | |
981 | int nexthops_active; | |
dc95824a DO |
982 | |
983 | /* Lookup table. */ | |
78104b9b | 984 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
985 | if (! table) |
986 | return ZEBRA_RIB_LOOKUP_ERROR; | |
987 | ||
988 | /* Scan the RIB table for exactly matching RIB entry. */ | |
989 | rn = route_node_lookup (table, (struct prefix *) p); | |
990 | ||
991 | /* No route for this prefix. */ | |
992 | if (! rn) | |
993 | return ZEBRA_RIB_NOTFOUND; | |
994 | ||
995 | /* Unlock node. */ | |
996 | route_unlock_node (rn); | |
997 | ||
998 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 999 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1000 | { |
1001 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1002 | continue; | |
1003 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1004 | break; | |
1005 | } | |
dc95824a DO |
1006 | |
1007 | /* None such found :( */ | |
1008 | if (!match) | |
1009 | return ZEBRA_RIB_NOTFOUND; | |
1010 | ||
1011 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1012 | return ZEBRA_RIB_FOUND_CONNECTED; | |
1013 | ||
1014 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
1015 | nexthops_active = 0; |
1016 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 1017 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 1018 | { |
fa713d9e CF |
1019 | nexthops_active = 1; |
1020 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
1021 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 1022 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
1023 | { |
1024 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
1025 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
1026 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
1027 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
1028 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1029 | } | |
dc95824a | 1030 | } |
fa713d9e CF |
1031 | |
1032 | if (nexthops_active) | |
1033 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1034 | |
1035 | return ZEBRA_RIB_NOTFOUND; | |
1036 | } | |
1037 | ||
7514fb77 PJ |
1038 | #define RIB_SYSTEM_ROUTE(R) \ |
1039 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1040 | ||
dc95824a DO |
1041 | /* This function verifies reachability of one given nexthop, which can be |
1042 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1043 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1044 | * nexthop->ifindex will be updated appropriately as well. | |
1045 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1046 | * not vice versa. | |
1047 | * | |
1048 | * The return value is the final value of 'ACTIVE' flag. | |
1049 | */ | |
1050 | ||
d02c56cd | 1051 | static unsigned |
718e3744 | 1052 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1053 | struct nexthop *nexthop, int set) | |
1054 | { | |
f3a1732e | 1055 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1056 | struct interface *ifp; |
7514fb77 | 1057 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1058 | int family; |
518f0eb1 | 1059 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1060 | |
7a4bb9c5 DS |
1061 | if (rn->p.family == AF_INET) |
1062 | family = AFI_IP; | |
1063 | else if (rn->p.family == AF_INET6) | |
1064 | family = AFI_IP6; | |
1065 | else | |
1066 | family = 0; | |
718e3744 | 1067 | switch (nexthop->type) |
1068 | { | |
1069 | case NEXTHOP_TYPE_IFINDEX: | |
78104b9b | 1070 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1071 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1072 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1073 | else | |
1074 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1075 | break; | |
718e3744 | 1076 | case NEXTHOP_TYPE_IPV4: |
1077 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1078 | family = AFI_IP; |
718e3744 | 1079 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1080 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1081 | else | |
1082 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1083 | break; | |
718e3744 | 1084 | case NEXTHOP_TYPE_IPV6: |
7514fb77 | 1085 | family = AFI_IP6; |
718e3744 | 1086 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1087 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1088 | else | |
1089 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1090 | break; | |
1091 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 1092 | /* RFC 5549, v4 prefix with v6 NH */ |
1093 | if (rn->p.family != AF_INET) | |
1094 | family = AFI_IP6; | |
718e3744 | 1095 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1096 | { | |
78104b9b | 1097 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1098 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1099 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1100 | else | |
1101 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1102 | } | |
1103 | else | |
1104 | { | |
1105 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1106 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1107 | else | |
1108 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1109 | } | |
1110 | break; | |
595db7f1 | 1111 | case NEXTHOP_TYPE_BLACKHOLE: |
1112 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1113 | break; | |
718e3744 | 1114 | default: |
1115 | break; | |
1116 | } | |
7514fb77 PJ |
1117 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1118 | return 0; | |
1119 | ||
f3a1732e CF |
1120 | /* XXX: What exactly do those checks do? Do we support |
1121 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1122 | if (RIB_SYSTEM_ROUTE(rib) || |
1123 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1124 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1125 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1126 | ||
f3a1732e CF |
1127 | /* The original code didn't determine the family correctly |
1128 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1129 | * from the rib_table_info in those cases. | |
1130 | * Possibly it may be better to use only the rib_table_info | |
1131 | * in every case. | |
1132 | */ | |
1133 | if (!family) | |
1134 | family = info->afi; | |
1135 | ||
c52ef59f | 1136 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1137 | |
ca84c8ef | 1138 | /* It'll get set if required inside */ |
0032dd59 FL |
1139 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->vrf_id, |
1140 | rib->tag); | |
7514fb77 | 1141 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1142 | { |
1143 | if (IS_ZEBRA_DEBUG_RIB) | |
1144 | { | |
1145 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
41ec9222 | 1146 | zlog_debug("%u:%s/%d: Filtering out with NH out %s due to route map", |
3ee39b5b DS |
1147 | rib->vrf_id, buf, rn->p.prefixlen, |
1148 | ifindex2ifname_vrf (nexthop->ifindex, rib->vrf_id)); | |
518f0eb1 DS |
1149 | } |
1150 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1151 | } | |
718e3744 | 1152 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1153 | } | |
1154 | ||
03e232a4 DO |
1155 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1156 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1157 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
2f97fa65 | 1158 | * is flagged with RIB_ENTRY_CHANGED. The 4th 'set' argument is |
03e232a4 DO |
1159 | * transparently passed to nexthop_active_check(). |
1160 | * | |
1161 | * Return value is the new number of active nexthops. | |
1162 | */ | |
1163 | ||
a1ac18c4 | 1164 | static int |
718e3744 | 1165 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1166 | { | |
1167 | struct nexthop *nexthop; | |
c52ef59f | 1168 | union g_addr prev_src; |
b892f1dd PJ |
1169 | unsigned int prev_active, new_active, old_num_nh; |
1170 | ifindex_t prev_index; | |
6e26278c | 1171 | old_num_nh = rib->nexthop_active_num; |
718e3744 | 1172 | |
1173 | rib->nexthop_active_num = 0; | |
2f97fa65 | 1174 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
718e3744 | 1175 | |
1176 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1177 | { |
c52ef59f DS |
1178 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1179 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1180 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1181 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1182 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1183 | rib->nexthop_active_num++; | |
c52ef59f | 1184 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1185 | if (prev_active != new_active || |
c52ef59f DS |
1186 | prev_index != nexthop->ifindex || |
1187 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1188 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1189 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1190 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1191 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1192 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c | 1193 | { |
2b50b603 | 1194 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c DS |
1195 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1196 | } | |
03e232a4 | 1197 | } |
6e26278c DS |
1198 | |
1199 | if (old_num_nh != rib->nexthop_active_num) | |
2b50b603 | 1200 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c | 1201 | |
2b50b603 | 1202 | if (CHECK_FLAG (rib->status, RIB_ENTRY_CHANGED)) |
6e26278c DS |
1203 | { |
1204 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1205 | } | |
1206 | ||
718e3744 | 1207 | return rib->nexthop_active_num; |
1208 | } | |
6baeb988 | 1209 | |
6b0655a2 | 1210 | |
718e3744 | 1211 | |
6ae24471 DS |
1212 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1213 | * is only used for IPv4. | |
1214 | */ | |
28f6dde8 | 1215 | int |
6ae24471 | 1216 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1217 | { |
1218 | int ret = 0; | |
fa713d9e | 1219 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1220 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1221 | int recursing; |
718e3744 | 1222 | |
416ec78d DL |
1223 | if (info->safi != SAFI_UNICAST) |
1224 | { | |
1225 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1226 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1227 | return ret; | |
1228 | } | |
1229 | ||
5adc2528 AS |
1230 | /* |
1231 | * Make sure we update the FPM any time we send new information to | |
1232 | * the kernel. | |
1233 | */ | |
1234 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1235 | switch (PREFIX_FAMILY (&rn->p)) |
1236 | { | |
1237 | case AF_INET: | |
6ae24471 DS |
1238 | if (update) |
1239 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1240 | else | |
1241 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1242 | break; |
718e3744 | 1243 | case AF_INET6: |
dccc5225 | 1244 | if (update) |
1245 | ret = kernel_update_ipv6 (&rn->p, rib); | |
1246 | else | |
1247 | ret = kernel_add_ipv6 (&rn->p, rib); | |
718e3744 | 1248 | break; |
718e3744 | 1249 | } |
1250 | ||
3e5c6e00 | 1251 | /* If install succeeds, update FIB flag for nexthops. */ |
1252 | if (!ret) | |
718e3744 | 1253 | { |
fa713d9e | 1254 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1255 | { |
1256 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1257 | continue; | |
1258 | ||
1259 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1260 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1261 | else | |
1262 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1263 | } | |
718e3744 | 1264 | } |
3e5c6e00 | 1265 | |
1266 | return ret; | |
718e3744 | 1267 | } |
1268 | ||
1269 | /* Uninstall the route from kernel. */ | |
28f6dde8 | 1270 | int |
718e3744 | 1271 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1272 | { | |
1273 | int ret = 0; | |
fa713d9e | 1274 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1275 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1276 | int recursing; |
718e3744 | 1277 | |
416ec78d DL |
1278 | if (info->safi != SAFI_UNICAST) |
1279 | { | |
1280 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1281 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1282 | return ret; | |
1283 | } | |
1284 | ||
5adc2528 AS |
1285 | /* |
1286 | * Make sure we update the FPM any time we send new information to | |
1287 | * the kernel. | |
1288 | */ | |
1289 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1290 | ||
718e3744 | 1291 | switch (PREFIX_FAMILY (&rn->p)) |
1292 | { | |
1293 | case AF_INET: | |
1294 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1295 | break; | |
718e3744 | 1296 | case AF_INET6: |
1297 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1298 | break; | |
718e3744 | 1299 | } |
1300 | ||
fa713d9e | 1301 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1302 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1303 | ||
1304 | return ret; | |
1305 | } | |
1306 | ||
1307 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1308 | static void |
718e3744 | 1309 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1310 | { | |
416ec78d DL |
1311 | rib_table_info_t *info = rn->table->info; |
1312 | ||
718e3744 | 1313 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
1314 | { | |
416ec78d DL |
1315 | if (info->safi == SAFI_UNICAST) |
1316 | zfpm_trigger_update (rn, "rib_uninstall"); | |
5adc2528 | 1317 | |
718e3744 | 1318 | redistribute_delete (&rn->p, rib); |
1319 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1320 | rib_uninstall_kernel (rn, rib); | |
1321 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1322 | } | |
1323 | } | |
1324 | ||
6d691129 PJ |
1325 | static void rib_unlink (struct route_node *, struct rib *); |
1326 | ||
9fd92e3c AS |
1327 | /* |
1328 | * rib_can_delete_dest | |
1329 | * | |
1330 | * Returns TRUE if the given dest can be deleted from the table. | |
1331 | */ | |
1332 | static int | |
1333 | rib_can_delete_dest (rib_dest_t *dest) | |
1334 | { | |
1335 | if (dest->routes) | |
1336 | { | |
1337 | return 0; | |
1338 | } | |
1339 | ||
5adc2528 AS |
1340 | /* |
1341 | * Don't delete the dest if we have to update the FPM about this | |
1342 | * prefix. | |
1343 | */ | |
1344 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1345 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1346 | return 0; | |
1347 | ||
9fd92e3c AS |
1348 | return 1; |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * rib_gc_dest | |
1353 | * | |
1354 | * Garbage collect the rib dest corresponding to the given route node | |
1355 | * if appropriate. | |
1356 | * | |
1357 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1358 | */ | |
1359 | int | |
1360 | rib_gc_dest (struct route_node *rn) | |
1361 | { | |
1362 | rib_dest_t *dest; | |
41ec9222 | 1363 | struct zebra_vrf *zvrf; |
9fd92e3c AS |
1364 | |
1365 | dest = rib_dest_from_rnode (rn); | |
1366 | if (!dest) | |
1367 | return 0; | |
1368 | ||
1369 | if (!rib_can_delete_dest (dest)) | |
1370 | return 0; | |
1371 | ||
41ec9222 | 1372 | zvrf = rib_dest_vrf (dest); |
2263a412 DL |
1373 | if (IS_ZEBRA_DEBUG_RIB) |
1374 | rnode_debug (rn, zvrf->vrf_id, "removing dest from table"); | |
9fd92e3c AS |
1375 | |
1376 | dest->rnode = NULL; | |
1377 | XFREE (MTYPE_RIB_DEST, dest); | |
1378 | rn->info = NULL; | |
1379 | ||
1380 | /* | |
1381 | * Release the one reference that we keep on the route node. | |
1382 | */ | |
1383 | route_unlock_node (rn); | |
1384 | return 1; | |
1385 | } | |
1386 | ||
3e5c6e00 | 1387 | static void |
1388 | rib_process_add_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1389 | struct rib *select) | |
1390 | { | |
1391 | char buf[INET6_ADDRSTRLEN]; | |
1392 | int installed = 1; | |
1393 | ||
1394 | zfpm_trigger_update (rn, "new route selected"); | |
1395 | ||
1396 | /* Update real nexthop. This may actually determine if nexthop is active or not. */ | |
1397 | if (!nexthop_active_update (rn, select, 1)) | |
1398 | { | |
2b50b603 | 1399 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1400 | return; |
1401 | } | |
1402 | ||
1403 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1404 | if (IS_ZEBRA_DEBUG_RIB) | |
1405 | { | |
1406 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1407 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1408 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1409 | } | |
1410 | ||
1411 | if (!RIB_SYSTEM_ROUTE (select)) | |
1412 | { | |
1413 | if (rib_install_kernel (rn, select, 0)) | |
1414 | { | |
1415 | installed = 0; | |
fb02523b DS |
1416 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1417 | zlog_warn ("%u:%s/%d: Route install failed", | |
1418 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1419 | } |
1420 | } | |
1421 | ||
1422 | /* Update for redistribution. */ | |
1423 | if (installed) | |
1424 | redistribute_update (&rn->p, select, NULL); | |
2b50b603 | 1425 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1426 | } |
1427 | ||
1428 | static void | |
1429 | rib_process_del_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1430 | struct rib *fib) | |
1431 | { | |
1432 | char buf[INET6_ADDRSTRLEN]; | |
1433 | ||
1434 | zfpm_trigger_update (rn, "removing existing route"); | |
1435 | ||
1436 | /* Withdraw redistribute and uninstall from kernel. */ | |
1437 | if (IS_ZEBRA_DEBUG_RIB) | |
1438 | { | |
1439 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1440 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1441 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1442 | } | |
1443 | ||
1444 | redistribute_delete(&rn->p, fib); | |
1445 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1446 | rib_uninstall_kernel (rn, fib); | |
1447 | ||
1448 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1449 | ||
1450 | /* Update nexthop for route, reset changed flag. */ | |
1451 | nexthop_active_update (rn, fib, 1); | |
2b50b603 | 1452 | UNSET_FLAG(fib->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1453 | } |
1454 | ||
1455 | static void | |
1456 | rib_process_update_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1457 | struct rib *select, struct rib *fib) | |
1458 | { | |
1459 | char buf[INET6_ADDRSTRLEN]; | |
1460 | struct nexthop *nexthop = NULL, *tnexthop; | |
1461 | int recursing; | |
1462 | int nh_active = 0; | |
1463 | int installed = 1; | |
1464 | ||
1465 | if (IS_ZEBRA_DEBUG_RIB) | |
1466 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1467 | ||
1468 | /* | |
1469 | * We have to install or update if a new route has been selected or | |
1470 | * something has changed. | |
1471 | */ | |
1472 | if (select != fib || | |
2b50b603 | 1473 | CHECK_FLAG (select->status, RIB_ENTRY_CHANGED)) |
3e5c6e00 | 1474 | { |
1475 | zfpm_trigger_update (rn, "updating existing route"); | |
1476 | ||
1477 | /* Update the nexthop; we could determine here that nexthop is inactive. */ | |
1478 | if (nexthop_active_update (rn, select, 1)) | |
1479 | nh_active = 1; | |
1480 | ||
1481 | /* If nexthop is active, install the selected route, if appropriate. If | |
1482 | * the install succeeds, cleanup flags for prior route, if different from | |
1483 | * newly selected. | |
1484 | */ | |
1485 | if (nh_active) | |
1486 | { | |
1487 | if (IS_ZEBRA_DEBUG_RIB) | |
1488 | { | |
1489 | if (select != fib) | |
1490 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1491 | "old %p (type %d)", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1492 | rn, select, select->type, fib, fib->type); | |
1493 | else | |
1494 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1495 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1496 | } | |
1497 | /* Non-system route should be installed. */ | |
1498 | if (!RIB_SYSTEM_ROUTE (select)) | |
1499 | { | |
1500 | if (rib_install_kernel (rn, select, 1)) | |
1501 | { | |
1502 | installed = 0; | |
fb02523b DS |
1503 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1504 | zlog_warn ("%u:%s/%d: Route install failed", | |
1505 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1506 | } |
1507 | } | |
1508 | ||
1509 | /* If install succeeded or system route, cleanup flags for prior route. */ | |
1510 | if (installed && select != fib) | |
1511 | { | |
1512 | if (RIB_SYSTEM_ROUTE(select)) | |
1513 | { | |
1514 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1515 | rib_uninstall_kernel (rn, fib); | |
1516 | } | |
1517 | else | |
1518 | { | |
1519 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1520 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1521 | } | |
3e5c6e00 | 1522 | } |
1523 | ||
1524 | /* Update for redistribution. */ | |
1525 | if (installed) | |
1526 | { | |
1527 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1528 | redistribute_update (&rn->p, select, (select == fib) ? NULL : fib); | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | /* | |
1533 | * If nexthop for selected route is not active or install failed, we | |
1534 | * may need to uninstall and delete for redistribution. | |
1535 | */ | |
1536 | if (!nh_active || !installed) | |
1537 | { | |
1538 | struct rib *del; | |
1539 | ||
1540 | if (IS_ZEBRA_DEBUG_RIB) | |
1541 | { | |
1542 | if (select != fib) | |
1543 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1544 | "old %p (type %d) - %s", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1545 | rn, select, select->type, fib, fib->type, | |
1546 | nh_active ? "install failed" : "nexthop inactive"); | |
1547 | else | |
1548 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) - %s", | |
1549 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type, | |
1550 | nh_active ? "install failed" : "nexthop inactive"); | |
1551 | } | |
1552 | ||
1553 | del = (select == fib) ? select : fib; | |
1554 | ||
1555 | redistribute_delete(&rn->p, del); | |
1556 | ||
1557 | if (!RIB_SYSTEM_ROUTE (del)) | |
1558 | rib_uninstall_kernel (rn, del); | |
1559 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1560 | } | |
1561 | } | |
1562 | else | |
1563 | { | |
1564 | /* | |
1565 | * Same route selected; check if in the FIB and if not, re-install. This | |
1566 | * is housekeeping code to deal with race conditions in kernel with linux | |
1567 | * netlink reporting interface up before IPv4 or IPv6 protocol is ready | |
1568 | * to add routes. | |
1569 | */ | |
1570 | if (!RIB_SYSTEM_ROUTE (select)) | |
1571 | { | |
1572 | int in_fib = 0; | |
1573 | ||
1574 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) | |
1575 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1576 | { | |
1577 | in_fib = 1; | |
1578 | break; | |
1579 | } | |
1580 | if (!in_fib) | |
1581 | rib_install_kernel (rn, select, 0); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | /* Update prior route. */ | |
1586 | if (select != fib) | |
1587 | { | |
1588 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1589 | ||
1590 | /* Set real nexthop. */ | |
1591 | nexthop_active_update (rn, fib, 1); | |
2b50b603 | 1592 | UNSET_FLAG(fib->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1593 | } |
1594 | ||
1595 | /* Clear changed flag. */ | |
2b50b603 | 1596 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1597 | } |
1598 | ||
bab85d4f CF |
1599 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1600 | static struct rib * | |
1601 | rib_choose_best (struct rib *current, struct rib *alternate) | |
1602 | { | |
1603 | if (current == NULL) | |
1604 | return alternate; | |
1605 | ||
1606 | /* filter route selection in following order: | |
1607 | * - connected beats other types | |
1608 | * - lower distance beats higher | |
1609 | * - lower metric beats higher for equal distance | |
1610 | * - last, hence oldest, route wins tie break. | |
1611 | */ | |
1612 | ||
1613 | /* Connected routes. Pick the last connected | |
1614 | * route of the set of lowest metric connected routes. | |
1615 | */ | |
1616 | if (alternate->type == ZEBRA_ROUTE_CONNECT) | |
1617 | { | |
1618 | if (current->type != ZEBRA_ROUTE_CONNECT | |
1619 | || alternate->metric <= current->metric) | |
1620 | return alternate; | |
1621 | ||
1622 | return current; | |
1623 | } | |
1624 | ||
1625 | if (current->type == ZEBRA_ROUTE_CONNECT) | |
1626 | return current; | |
1627 | ||
1628 | /* higher distance loses */ | |
1629 | if (alternate->distance < current->distance) | |
1630 | return alternate; | |
1631 | if (current->distance < alternate->distance) | |
1632 | return current; | |
1633 | ||
1634 | /* metric tie-breaks equal distance */ | |
1635 | if (alternate->metric <= current->metric) | |
1636 | return alternate; | |
1637 | ||
1638 | return current; | |
1639 | } | |
1640 | ||
718e3744 | 1641 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1642 | static void |
1643 | rib_process (struct route_node *rn) | |
718e3744 | 1644 | { |
1645 | struct rib *rib; | |
1646 | struct rib *next; | |
1647 | struct rib *fib = NULL; | |
1648 | struct rib *select = NULL; | |
6d691129 | 1649 | struct rib *del = NULL; |
bab85d4f | 1650 | struct rib *best = NULL; |
f304cb48 | 1651 | char buf[INET6_ADDRSTRLEN]; |
41ec9222 | 1652 | rib_dest_t *dest; |
1653 | struct zebra_vrf *zvrf = NULL; | |
58255d34 | 1654 | vrf_id_t vrf_id = VRF_UNKNOWN; |
7498d58d | 1655 | rib_table_info_t *info; |
41ec9222 | 1656 | |
4d38fdb4 | 1657 | assert (rn); |
7498d58d | 1658 | info = rn->table->info; |
4d38fdb4 | 1659 | |
41ec9222 | 1660 | dest = rib_dest_from_rnode (rn); |
1661 | if (dest) | |
1662 | { | |
1663 | zvrf = rib_dest_vrf (dest); | |
1664 | vrf_id = zvrf->vrf_id; | |
1665 | } | |
1666 | ||
1667 | if (IS_ZEBRA_DEBUG_RIB) | |
f304cb48 | 1668 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1669 | |
41ec9222 | 1670 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1671 | zlog_debug ("%u:%s/%d: Processing rn %p", vrf_id, buf, rn->p.prefixlen, rn); | |
1672 | ||
9fd92e3c | 1673 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1674 | { |
41ec9222 | 1675 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1676 | zlog_debug ("%u:%s/%d: Examine rib %p (type %d) status %x flags %x " | |
1677 | "dist %d metric %d", | |
1678 | vrf_id, buf, rn->p.prefixlen, rib, rib->type, rib->status, | |
1679 | rib->flags, rib->distance, rib->metric); | |
1680 | ||
6e26278c DS |
1681 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1682 | ||
718e3744 | 1683 | /* Currently installed rib. */ |
1684 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1685 | { |
1686 | assert (fib == NULL); | |
1687 | fib = rib; | |
1688 | } | |
ca657c65 | 1689 | |
6d691129 PJ |
1690 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1691 | * which we need to do do further work with below. | |
1692 | */ | |
1693 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1694 | { | |
1695 | if (rib != fib) | |
1696 | { | |
1697 | if (IS_ZEBRA_DEBUG_RIB) | |
6c4f4e6e DL |
1698 | rnode_debug (rn, vrf_id, "rn %p, removing rib %p", |
1699 | (void *)rn, (void *)rib); | |
9fd92e3c | 1700 | rib_unlink (rn, rib); |
6d691129 PJ |
1701 | } |
1702 | else | |
1703 | del = rib; | |
1704 | ||
1705 | continue; | |
1706 | } | |
4d38fdb4 | 1707 | |
718e3744 | 1708 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1709 | /* This first call to nexthop_active_update is merely to determine if |
1710 | * there's any change to nexthops associated with this RIB entry. Now, | |
1711 | * rib_process() can be invoked due to an external event such as link | |
1712 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1713 | * a decision has already been made that the NHs have changed. So, no | |
1714 | * need to invoke a potentially expensive call again. Further, since | |
1715 | * the change might be in a recursive NH which is not caught in | |
1716 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1717 | * recursive NHs. | |
6e26278c | 1718 | */ |
2b50b603 | 1719 | if (!CHECK_FLAG(rib->status, RIB_ENTRY_CHANGED) && |
f857321e DW |
1720 | ! nexthop_active_update (rn, rib, 0)) |
1721 | { | |
1722 | if (rib->type == ZEBRA_ROUTE_TABLE) | |
1723 | { | |
1724 | /* This entry was denied by the 'ip protocol table' route-map, we | |
1725 | * need to delete it */ | |
1726 | if (rib != fib) | |
1727 | { | |
1728 | if (IS_ZEBRA_DEBUG_RIB) | |
1729 | zlog_debug ("%s: %s/%d: imported via import-table but denied " | |
1730 | "by the ip protocol table route-map", | |
1731 | __func__, buf, rn->p.prefixlen); | |
1732 | rib_unlink (rn, rib); | |
1733 | } | |
1734 | else | |
1735 | del = rib; | |
1736 | } | |
1737 | ||
1738 | continue; | |
1739 | } | |
718e3744 | 1740 | |
7498d58d B |
1741 | if (info->safi == SAFI_MULTICAST) |
1742 | continue; | |
1743 | ||
f857321e | 1744 | /* Infinite distance. */ |
718e3744 | 1745 | if (rib->distance == DISTANCE_INFINITY) |
8733ba72 | 1746 | { |
2b50b603 | 1747 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1748 | continue; |
1749 | } | |
718e3744 | 1750 | |
bab85d4f CF |
1751 | best = rib_choose_best(select, rib); |
1752 | if (select && best != select) | |
1753 | UNSET_FLAG (select->status, RIB_ENTRY_CHANGED); | |
1754 | if (best != rib) | |
1755 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
1756 | select = best; | |
9fd92e3c | 1757 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1758 | |
1759 | /* After the cycle is finished, the following pointers will be set: | |
1760 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1761 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1762 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1763 | * rib --- NULL | |
1764 | */ | |
41ec9222 | 1765 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1766 | zlog_debug ("%u:%s/%d: After processing: select %p fib %p del %p", | |
1767 | vrf_id, buf, rn->p.prefixlen, select, fib, del); | |
dc95824a DO |
1768 | |
1769 | /* Same RIB entry is selected. Update FIB and finish. */ | |
3e5c6e00 | 1770 | if (select && select == fib) |
1771 | rib_process_update_route (zvrf, rn, select, select); | |
1772 | else if (select && fib) | |
1773 | rib_process_update_route (zvrf, rn, select, fib); | |
1774 | else if (select) | |
1775 | rib_process_add_route (zvrf, rn, select); | |
1776 | else if (fib) | |
1777 | rib_process_del_route (zvrf, rn, fib); | |
1778 | ||
1779 | #if 0 | |
718e3744 | 1780 | if (select && select == fib) |
1781 | { | |
2263a412 DL |
1782 | if (IS_ZEBRA_DEBUG_RIB) |
1783 | rnode_debug (rn, vrf_id, "Updating existing route, select %p, fib %p", | |
6c4f4e6e | 1784 | (void *)select, (void *)fib); |
2f97fa65 | 1785 | if (CHECK_FLAG (select->status, RIB_ENTRY_CHANGED)) |
4d38fdb4 | 1786 | { |
416ec78d DL |
1787 | if (info->safi == SAFI_UNICAST) |
1788 | zfpm_trigger_update (rn, "updating existing route"); | |
5adc2528 | 1789 | |
4d38fdb4 | 1790 | /* Set real nexthop. */ |
6e26278c DS |
1791 | /* Need to check if any NHs are active to clear the |
1792 | * the selected flag | |
1793 | */ | |
1794 | if (nexthop_active_update (rn, select, 1)) | |
1795 | { | |
41ec9222 | 1796 | if (IS_ZEBRA_DEBUG_RIB) |
1797 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1798 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
dccc5225 | 1799 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1800 | { |
dccc5225 | 1801 | /* Clear FIB flag if performing a replace, will get set again |
1802 | * as part of install. | |
1803 | */ | |
6ae24471 DS |
1804 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) |
1805 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
dccc5225 | 1806 | rib_install_kernel (rn, select, 1); |
6ae24471 | 1807 | } |
5048fe14 | 1808 | |
1809 | /* assuming that the receiver knows how to dedup */ | |
c41fc67b | 1810 | redistribute_update (&rn->p, select, NULL); |
6e26278c DS |
1811 | } |
1812 | else | |
1813 | { | |
41ec9222 | 1814 | if (IS_ZEBRA_DEBUG_RIB) |
1815 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1816 | "- nexthop inactive", | |
1817 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1818 | ||
5048fe14 | 1819 | /* Withdraw unreachable redistribute route */ |
1820 | redistribute_delete(&rn->p, select); | |
1821 | ||
dccc5225 | 1822 | /* Do the uninstall here, if not done earlier. */ |
1823 | if (! RIB_SYSTEM_ROUTE (select)) | |
6ae24471 | 1824 | rib_uninstall_kernel (rn, select); |
6e26278c DS |
1825 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1826 | } | |
2b50b603 | 1827 | UNSET_FLAG (select->status, RIB_ENTRY_CHANGED); |
6e26278c | 1828 | } |
d753e9ee | 1829 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1830 | { |
1831 | /* Housekeeping code to deal with | |
1832 | race conditions in kernel with linux | |
1833 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1834 | is ready to add routes. | |
1835 | This makes sure the routes are IN the kernel. | |
1836 | */ | |
1837 | ||
fa713d9e | 1838 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1839 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1840 | { |
a3aaf5b0 DO |
1841 | installed = 1; |
1842 | break; | |
4d38fdb4 | 1843 | } |
1844 | if (! installed) | |
6ae24471 | 1845 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1846 | } |
6d691129 | 1847 | goto end; |
718e3744 | 1848 | } |
1849 | ||
dc95824a DO |
1850 | /* At this point we either haven't found the best RIB entry or it is |
1851 | * different from what we currently intend to flag with SELECTED. In both | |
1852 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1853 | */ | |
718e3744 | 1854 | if (fib) |
1855 | { | |
2263a412 | 1856 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 1857 | rnode_debug (rn, vrf_id, "Removing existing route, fib %p", (void *)fib); |
2263a412 | 1858 | |
416ec78d DL |
1859 | if (info->safi == SAFI_UNICAST) |
1860 | zfpm_trigger_update (rn, "removing existing route"); | |
5adc2528 | 1861 | |
dccc5225 | 1862 | /* If there's no route to replace this with, withdraw redistribute and |
1863 | * uninstall from kernel. | |
1864 | */ | |
5048fe14 | 1865 | if (!select) |
6ae24471 | 1866 | { |
41ec9222 | 1867 | if (IS_ZEBRA_DEBUG_RIB) |
1868 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1869 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1870 | ||
dccc5225 | 1871 | redistribute_delete(&rn->p, fib); |
1872 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1873 | rib_uninstall_kernel (rn, fib); | |
6ae24471 | 1874 | } |
dccc5225 | 1875 | |
718e3744 | 1876 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1877 | ||
1878 | /* Set real nexthop. */ | |
1879 | nexthop_active_update (rn, fib, 1); | |
2b50b603 | 1880 | UNSET_FLAG(fib->status, RIB_ENTRY_CHANGED); |
718e3744 | 1881 | } |
1882 | ||
dc95824a DO |
1883 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1884 | * tell, that if a new winner exists, FIB is still not updated with this | |
1885 | * data, but ready to be. | |
1886 | */ | |
718e3744 | 1887 | if (select) |
1888 | { | |
2263a412 | 1889 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 1890 | rnode_debug (rn, "Adding route, select %p", (void *)select); |
2263a412 | 1891 | |
416ec78d DL |
1892 | if (info->safi == SAFI_UNICAST) |
1893 | zfpm_trigger_update (rn, "new route selected"); | |
5adc2528 | 1894 | |
718e3744 | 1895 | /* Set real nexthop. */ |
6e26278c DS |
1896 | if (nexthop_active_update (rn, select, 1)) |
1897 | { | |
41ec9222 | 1898 | if (IS_ZEBRA_DEBUG_RIB) |
1899 | { | |
1900 | if (fib) | |
1901 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1902 | "old %p (type %d)", vrf_id, buf, rn->p.prefixlen, rn, | |
1903 | select, select->type, fib, fib->type); | |
1904 | else | |
1905 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1906 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1907 | } | |
1908 | ||
dccc5225 | 1909 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1910 | { |
dccc5225 | 1911 | /* Clear FIB flag if performing a replace, will get set again |
1912 | * as part of install. | |
1913 | */ | |
1914 | if (fib) | |
1915 | { | |
1916 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1917 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1918 | } | |
1919 | rib_install_kernel (rn, select, fib? 1 : 0); | |
6ae24471 | 1920 | } |
0b560feb | 1921 | else |
1922 | { | |
1923 | /* Uninstall prior route here, if needed. */ | |
1924 | if (fib && !RIB_SYSTEM_ROUTE (fib)) | |
1925 | rib_uninstall_kernel (rn, fib); | |
1926 | } | |
dccc5225 | 1927 | |
6e26278c | 1928 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
5048fe14 | 1929 | /* Unconditionally announce, this part is exercised by new routes */ |
c41fc67b | 1930 | /* If we cannot add, for example route added is learnt by the */ |
1931 | /* protocol we're trying to redistribute to, delete the redist */ | |
1932 | /* This is notified by setting the is_update to 1 */ | |
1933 | redistribute_update (&rn->p, select, fib); | |
6e26278c | 1934 | } |
6ae24471 DS |
1935 | else |
1936 | { | |
41ec9222 | 1937 | /* Uninstall prior route here and do redist delete, if needed. */ |
a219b295 | 1938 | if (fib) |
41ec9222 | 1939 | { |
1940 | if (IS_ZEBRA_DEBUG_RIB) | |
1941 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1942 | "- nexthop inactive", | |
1943 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1944 | ||
1945 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1946 | rib_uninstall_kernel (rn, fib); | |
1947 | redistribute_delete(&rn->p, fib); | |
1948 | } | |
6ae24471 | 1949 | } |
2b50b603 | 1950 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
718e3744 | 1951 | } |
3e5c6e00 | 1952 | #endif |
4d38fdb4 | 1953 | |
6d691129 PJ |
1954 | /* FIB route was removed, should be deleted */ |
1955 | if (del) | |
1956 | { | |
1957 | if (IS_ZEBRA_DEBUG_RIB) | |
6c4f4e6e | 1958 | rnode_debug (rn, vrf_id, "Deleting fib %p, rn %p", (void *)del, (void *)rn); |
6d691129 PJ |
1959 | rib_unlink (rn, del); |
1960 | } | |
4d38fdb4 | 1961 | |
9fd92e3c AS |
1962 | /* |
1963 | * Check if the dest can be deleted now. | |
1964 | */ | |
1965 | rib_gc_dest (rn); | |
e96f9203 DO |
1966 | } |
1967 | ||
5110a0c6 SH |
1968 | /* Take a list of route_node structs and return 1, if there was a record |
1969 | * picked from it and processed by rib_process(). Don't process more, | |
1970 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1971 | */ |
ef9b113e | 1972 | static unsigned int |
e96f9203 DO |
1973 | process_subq (struct list * subq, u_char qindex) |
1974 | { | |
5110a0c6 | 1975 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1976 | struct route_node *rnode; |
41ec9222 | 1977 | char buf[INET6_ADDRSTRLEN]; |
1978 | rib_dest_t *dest; | |
1979 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 SH |
1980 | |
1981 | if (!lnode) | |
e96f9203 | 1982 | return 0; |
5110a0c6 | 1983 | |
e96f9203 | 1984 | rnode = listgetdata (lnode); |
41ec9222 | 1985 | dest = rib_dest_from_rnode (rnode); |
1986 | if (dest) | |
1987 | zvrf = rib_dest_vrf (dest); | |
1988 | ||
e96f9203 | 1989 | rib_process (rnode); |
5110a0c6 | 1990 | |
41ec9222 | 1991 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1992 | { | |
1993 | inet_ntop (rnode->p.family, &rnode->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1994 | zlog_debug ("%u:%s/%d: rn %p dequeued from sub-queue %u", | |
1995 | zvrf ? zvrf->vrf_id : 0, buf, rnode->p.prefixlen, rnode, qindex); | |
1996 | } | |
1997 | ||
9fd92e3c AS |
1998 | if (rnode->info) |
1999 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
2000 | ||
67b9467f | 2001 | #if 0 |
5110a0c6 SH |
2002 | else |
2003 | { | |
2004 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
2005 | __func__, rnode, rnode->lock); | |
2006 | zlog_backtrace(LOG_DEBUG); | |
2007 | } | |
67b9467f | 2008 | #endif |
e96f9203 DO |
2009 | route_unlock_node (rnode); |
2010 | list_delete_node (subq, lnode); | |
2011 | return 1; | |
2012 | } | |
2013 | ||
fb018d25 DS |
2014 | /* |
2015 | * All meta queues have been processed. Trigger next-hop evaluation. | |
2016 | */ | |
2017 | static void | |
2018 | meta_queue_process_complete (struct work_queue *dummy) | |
2019 | { | |
9ec6b0bb | 2020 | vrf_iter_t iter; |
2021 | struct zebra_vrf *zvrf; | |
2022 | ||
2023 | /* Evaluate nexthops for those VRFs which underwent route processing. This | |
2024 | * should limit the evaluation to the necessary VRFs in most common | |
2025 | * situations. | |
2026 | */ | |
2027 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
2028 | { | |
2029 | if (((zvrf = vrf_iter2info (iter)) != NULL) && | |
2030 | (zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
2031 | { | |
2032 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
2033 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); | |
2034 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
2035 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); | |
2036 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
2037 | } | |
2038 | } | |
939fba27 | 2039 | |
2040 | /* Schedule LSPs for processing, if needed. */ | |
2041 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
2042 | if (mpls_should_lsps_be_processed(zvrf)) | |
2043 | { | |
2044 | if (IS_ZEBRA_DEBUG_MPLS) | |
2045 | zlog_debug ("%u: Scheduling all LSPs upon RIB completion", zvrf->vrf_id); | |
2046 | zebra_mpls_lsp_schedule (zvrf); | |
2047 | mpls_unmark_lsps_for_processing(zvrf); | |
2048 | } | |
fb018d25 DS |
2049 | } |
2050 | ||
e96f9203 DO |
2051 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
2052 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
2053 | * is pointed to the meta queue structure. | |
2054 | */ | |
2055 | static wq_item_status | |
2056 | meta_queue_process (struct work_queue *dummy, void *data) | |
2057 | { | |
2058 | struct meta_queue * mq = data; | |
5110a0c6 SH |
2059 | unsigned i; |
2060 | ||
e96f9203 DO |
2061 | for (i = 0; i < MQ_SIZE; i++) |
2062 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
2063 | { |
2064 | mq->size--; | |
2065 | break; | |
2066 | } | |
e96f9203 DO |
2067 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
2068 | } | |
2069 | ||
9fd92e3c AS |
2070 | /* |
2071 | * Map from rib types to queue type (priority) in meta queue | |
2072 | */ | |
5110a0c6 SH |
2073 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
2074 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
2075 | [ZEBRA_ROUTE_KERNEL] = 0, | |
2076 | [ZEBRA_ROUTE_CONNECT] = 0, | |
2077 | [ZEBRA_ROUTE_STATIC] = 1, | |
2078 | [ZEBRA_ROUTE_RIP] = 2, | |
2079 | [ZEBRA_ROUTE_RIPNG] = 2, | |
2080 | [ZEBRA_ROUTE_OSPF] = 2, | |
2081 | [ZEBRA_ROUTE_OSPF6] = 2, | |
2082 | [ZEBRA_ROUTE_ISIS] = 2, | |
2083 | [ZEBRA_ROUTE_BGP] = 3, | |
2084 | [ZEBRA_ROUTE_HSLS] = 4, | |
7a4bb9c5 | 2085 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
2086 | }; |
2087 | ||
2088 | /* Look into the RN and queue it into one or more priority queues, | |
2089 | * increasing the size for each data push done. | |
e96f9203 | 2090 | */ |
ef9b113e SH |
2091 | static void |
2092 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 2093 | { |
e96f9203 | 2094 | struct rib *rib; |
5110a0c6 | 2095 | |
9fd92e3c | 2096 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 2097 | { |
5110a0c6 | 2098 | u_char qindex = meta_queue_map[rib->type]; |
9ec6b0bb | 2099 | struct zebra_vrf *zvrf; |
5110a0c6 SH |
2100 | |
2101 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
2102 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
2103 | RIB_ROUTE_QUEUED (qindex))) | |
2263a412 DL |
2104 | { |
2105 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2106 | rnode_debug (rn, rib->vrf_id, "rn %p is already queued in sub-queue %u", | |
6c4f4e6e | 2107 | (void *)rn, qindex); |
2263a412 DL |
2108 | continue; |
2109 | } | |
5110a0c6 | 2110 | |
9fd92e3c | 2111 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
2112 | listnode_add (mq->subq[qindex], rn); |
2113 | route_lock_node (rn); | |
2114 | mq->size++; | |
2115 | ||
41ec9222 | 2116 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2117 | rnode_debug (rn, rib->vrf_id, "queued rn %p into sub-queue %u", |
6c4f4e6e | 2118 | (void *)rn, qindex); |
9ec6b0bb | 2119 | |
2120 | zvrf = zebra_vrf_lookup (rib->vrf_id); | |
2121 | if (zvrf) | |
2122 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
e96f9203 | 2123 | } |
4d38fdb4 | 2124 | } |
2125 | ||
6d691129 | 2126 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 2127 | void |
44e9909d | 2128 | rib_queue_add (struct route_node *rn) |
4d38fdb4 | 2129 | { |
44e9909d | 2130 | assert (rn); |
4d38fdb4 | 2131 | |
fc328ac9 | 2132 | /* Pointless to queue a route_node with no RIB entries to add or remove */ |
9fd92e3c | 2133 | if (!rnode_to_ribs (rn)) |
6d691129 | 2134 | { |
fc328ac9 | 2135 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
6c4f4e6e | 2136 | __func__, (void *)rn, rn->lock); |
fc328ac9 SV |
2137 | zlog_backtrace(LOG_DEBUG); |
2138 | return; | |
2139 | } | |
2140 | ||
44e9909d | 2141 | if (zebrad.ribq == NULL) |
fc328ac9 SV |
2142 | { |
2143 | zlog_err ("%s: work_queue does not exist!", __func__); | |
2144 | return; | |
4d38fdb4 | 2145 | } |
4d38fdb4 | 2146 | |
cc2dd928 SH |
2147 | /* |
2148 | * The RIB queue should normally be either empty or holding the only | |
2149 | * work_queue_item element. In the latter case this element would | |
2150 | * hold a pointer to the meta queue structure, which must be used to | |
2151 | * actually queue the route nodes to process. So create the MQ | |
2152 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
2153 | * This semantics was introduced after 0.99.9 release. |
2154 | */ | |
44e9909d DS |
2155 | if (!zebrad.ribq->items->count) |
2156 | work_queue_add (zebrad.ribq, zebrad.mq); | |
e96f9203 | 2157 | |
44e9909d | 2158 | rib_meta_queue_add (zebrad.mq, rn); |
fc328ac9 | 2159 | |
fc328ac9 | 2160 | return; |
4d38fdb4 | 2161 | } |
2162 | ||
5110a0c6 SH |
2163 | /* Create new meta queue. |
2164 | A destructor function doesn't seem to be necessary here. | |
2165 | */ | |
ef9b113e SH |
2166 | static struct meta_queue * |
2167 | meta_queue_new (void) | |
e96f9203 DO |
2168 | { |
2169 | struct meta_queue *new; | |
5110a0c6 SH |
2170 | unsigned i; |
2171 | ||
2172 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
2173 | assert(new); | |
e96f9203 | 2174 | |
e96f9203 | 2175 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
2176 | { |
2177 | new->subq[i] = list_new (); | |
2178 | assert(new->subq[i]); | |
2179 | } | |
2180 | ||
e96f9203 DO |
2181 | return new; |
2182 | } | |
2183 | ||
4d38fdb4 | 2184 | /* initialise zebra rib work queue */ |
a1ac18c4 | 2185 | static void |
4d38fdb4 | 2186 | rib_queue_init (struct zebra_t *zebra) |
2187 | { | |
fc328ac9 SV |
2188 | assert (zebra); |
2189 | ||
4d38fdb4 | 2190 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 2191 | "route_node processing"))) |
4d38fdb4 | 2192 | { |
6d691129 | 2193 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 2194 | return; |
2195 | } | |
2196 | ||
2197 | /* fill in the work queue spec */ | |
e96f9203 | 2198 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2199 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2200 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2201 | /* XXX: TODO: These should be runtime configurable via vty */ |
2202 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2203 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2204 | |
e96f9203 | 2205 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2206 | { |
e96f9203 | 2207 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2208 | return; |
2209 | } | |
2210 | return; | |
718e3744 | 2211 | } |
2212 | ||
6d691129 PJ |
2213 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2214 | * | |
2215 | * The queue length is bounded by the maximal size of the routing table, | |
2216 | * as a route_node will not be requeued, if already queued. | |
2217 | * | |
3c0755dc | 2218 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
bcd548ff | 2219 | * state, or static_install_route (when an existing RIB is updated) |
3c0755dc PJ |
2220 | * and then submit route_node to queue for best-path selection later. |
2221 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2222 | * |
2223 | * Deleted RIBs are reaped during best-path selection. | |
2224 | * | |
2225 | * rib_addnode | |
2226 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2227 | * |-------->| | best RIB, if required |
2228 | * | | | |
2229 | * static_install->|->rib_addqueue...... -> rib_process | |
2230 | * | | | |
2231 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2232 | * |-> set RIB_ENTRY_REMOVE | |
2233 | * rib_delnode (RIB freed) | |
2234 | * | |
9fd92e3c AS |
2235 | * The 'info' pointer of a route_node points to a rib_dest_t |
2236 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2237 | * dest is created on-demand by rib_link() and is kept around at least | |
2238 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2239 | * |
2240 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2241 | * | |
2242 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2243 | * - dest attached to route_node: |
2244 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2245 | * - route_node processing queue |
2246 | * - managed by: rib_addqueue, rib_process. | |
2247 | * | |
2248 | */ | |
2249 | ||
718e3744 | 2250 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2251 | static void |
2bf26d41 | 2252 | rib_link (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2253 | { |
2254 | struct rib *head; | |
9fd92e3c | 2255 | rib_dest_t *dest; |
7a4bb9c5 | 2256 | afi_t afi; |
8902474b | 2257 | const char *rmap_name; |
9fd92e3c | 2258 | |
4d38fdb4 | 2259 | assert (rib && rn); |
2260 | ||
9fd92e3c AS |
2261 | dest = rib_dest_from_rnode (rn); |
2262 | if (!dest) | |
6d691129 | 2263 | { |
41ec9222 | 2264 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2265 | rnode_debug (rn, rib->vrf_id, "rn %p adding dest", rn); |
9fd92e3c AS |
2266 | |
2267 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2268 | route_lock_node (rn); /* rn route table reference */ | |
2269 | rn->info = dest; | |
2270 | dest->rnode = rn; | |
2271 | } | |
2272 | ||
2273 | head = dest->routes; | |
2274 | if (head) | |
2275 | { | |
6d691129 | 2276 | head->prev = rib; |
6d691129 | 2277 | } |
718e3744 | 2278 | rib->next = head; |
9fd92e3c | 2279 | dest->routes = rib; |
7a4bb9c5 | 2280 | |
12f6fb97 DS |
2281 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2282 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2283 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
8902474b DS |
2284 | { |
2285 | rmap_name = zebra_get_import_table_route_map (afi, rib->table); | |
2286 | zebra_add_import_table_entry(rn, rib, rmap_name); | |
2287 | } | |
7a4bb9c5 | 2288 | else |
12f6fb97 | 2289 | if (process) |
44e9909d | 2290 | rib_queue_add (rn); |
718e3744 | 2291 | } |
2292 | ||
28f6dde8 | 2293 | void |
2bf26d41 | 2294 | rib_addnode (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2295 | { |
6d691129 PJ |
2296 | /* RIB node has been un-removed before route-node is processed. |
2297 | * route_node must hence already be on the queue for processing.. | |
2298 | */ | |
2299 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2300 | { | |
2263a412 | 2301 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2302 | rnode_debug (rn, rib->vrf_id, "rn %p, un-removed rib %p", (void *)rn, (void *)rib); |
2263a412 | 2303 | |
6d691129 PJ |
2304 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2305 | return; | |
2306 | } | |
2bf26d41 | 2307 | rib_link (rn, rib, process); |
6d691129 PJ |
2308 | } |
2309 | ||
9fd92e3c AS |
2310 | /* |
2311 | * rib_unlink | |
2312 | * | |
2313 | * Detach a rib structure from a route_node. | |
2314 | * | |
2315 | * Note that a call to rib_unlink() should be followed by a call to | |
2316 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2317 | * longer required to be deleted. | |
2318 | */ | |
6d691129 PJ |
2319 | static void |
2320 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2321 | { | |
9fd92e3c | 2322 | rib_dest_t *dest; |
6d691129 | 2323 | |
4d38fdb4 | 2324 | assert (rn && rib); |
6d691129 | 2325 | |
2263a412 | 2326 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2327 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p", (void *)rn, (void *)rib); |
2263a412 | 2328 | |
9fd92e3c AS |
2329 | dest = rib_dest_from_rnode (rn); |
2330 | ||
718e3744 | 2331 | if (rib->next) |
2332 | rib->next->prev = rib->prev; | |
6d691129 | 2333 | |
718e3744 | 2334 | if (rib->prev) |
2335 | rib->prev->next = rib->next; | |
2336 | else | |
6d691129 | 2337 | { |
9fd92e3c | 2338 | dest->routes = rib->next; |
6d691129 PJ |
2339 | } |
2340 | ||
2341 | /* free RIB and nexthops */ | |
d82ae0de | 2342 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, rib->nexthop, rn); |
a399694f | 2343 | nexthops_free(rib->nexthop); |
6d691129 PJ |
2344 | XFREE (MTYPE_RIB, rib); |
2345 | ||
6d691129 PJ |
2346 | } |
2347 | ||
28f6dde8 | 2348 | void |
6d691129 PJ |
2349 | rib_delnode (struct route_node *rn, struct rib *rib) |
2350 | { | |
7a4bb9c5 DS |
2351 | afi_t afi; |
2352 | ||
2263a412 | 2353 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2354 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p, removing", (void *)rn, (void *)rib); |
6d691129 | 2355 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 | 2356 | |
12f6fb97 DS |
2357 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2358 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2359 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
7a4bb9c5 | 2360 | { |
12f6fb97 | 2361 | zebra_del_import_table_entry(rn, rib); |
7a4bb9c5 | 2362 | /* Just clean up if non main table */ |
41ec9222 | 2363 | if (IS_ZEBRA_DEBUG_RIB) |
2364 | { | |
2365 | char buf[INET6_ADDRSTRLEN]; | |
2366 | if (IS_ZEBRA_DEBUG_RIB) | |
2367 | { | |
2368 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
2369 | zlog_debug ("%u:%s/%d: Freeing route rn %p, rib %p (type %d)", | |
2370 | rib->vrf_id, buf, rn->p.prefixlen, rn, rib, rib->type); | |
2371 | } | |
2372 | } | |
2373 | ||
7a4bb9c5 DS |
2374 | rib_unlink(rn, rib); |
2375 | } | |
12f6fb97 DS |
2376 | else |
2377 | { | |
44e9909d | 2378 | rib_queue_add (rn); |
12f6fb97 | 2379 | } |
718e3744 | 2380 | } |
2381 | ||
dc95824a DO |
2382 | /* This function dumps the contents of a given RIB entry into |
2383 | * standard debug log. Calling function name and IP prefix in | |
2384 | * question are passed as 1st and 2nd arguments. | |
2385 | */ | |
2386 | ||
f7bf4153 DL |
2387 | void _rib_dump (const char * func, |
2388 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2389 | { |
f7bf4153 | 2390 | const struct prefix *p = pp.p; |
35d921cc | 2391 | char straddr[PREFIX_STRLEN]; |
fa713d9e CF |
2392 | struct nexthop *nexthop, *tnexthop; |
2393 | int recursing; | |
dc95824a | 2394 | |
6c4f4e6e | 2395 | zlog_debug ("%s: dumping RIB entry %p for %s vrf %u", func, (const void *)rib, |
78104b9b | 2396 | prefix2str(pp, straddr, sizeof(straddr)), rib->vrf_id); |
dc95824a DO |
2397 | zlog_debug |
2398 | ( | |
7c8ff89e | 2399 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2400 | func, |
2401 | rib->refcnt, | |
d02c56cd | 2402 | (unsigned long) rib->uptime, |
dc95824a | 2403 | rib->type, |
7c8ff89e | 2404 | rib->instance, |
dc95824a DO |
2405 | rib->table |
2406 | ); | |
2407 | zlog_debug | |
2408 | ( | |
c50ca33a | 2409 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", |
dc95824a DO |
2410 | func, |
2411 | rib->metric, | |
c50ca33a | 2412 | rib->mtu, |
dc95824a DO |
2413 | rib->distance, |
2414 | rib->flags, | |
2415 | rib->status | |
2416 | ); | |
2417 | zlog_debug | |
2418 | ( | |
2419 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2420 | func, | |
2421 | rib->nexthop_num, | |
2422 | rib->nexthop_active_num, | |
2423 | rib->nexthop_fib_num | |
2424 | ); | |
fed643f4 | 2425 | |
fa713d9e CF |
2426 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2427 | { | |
fed643f4 | 2428 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2429 | zlog_debug |
2430 | ( | |
2431 | "%s: %s %s with flags %s%s%s", | |
2432 | func, | |
2433 | (recursing ? " NH" : "NH"), | |
2434 | straddr, | |
2435 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2436 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2437 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2438 | ); | |
2439 | } | |
dc95824a DO |
2440 | zlog_debug ("%s: dump complete", func); |
2441 | } | |
2442 | ||
2443 | /* This is an exported helper to rtm_read() to dump the strange | |
2444 | * RIB entry found by rib_lookup_ipv4_route() | |
2445 | */ | |
2446 | ||
12f6fb97 | 2447 | void rib_lookup_and_dump (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
dc95824a DO |
2448 | { |
2449 | struct route_table *table; | |
2450 | struct route_node *rn; | |
2451 | struct rib *rib; | |
2452 | char prefix_buf[INET_ADDRSTRLEN]; | |
2453 | ||
2454 | /* Lookup table. */ | |
12f6fb97 | 2455 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
2456 | if (! table) |
2457 | { | |
b72ede27 | 2458 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2459 | return; |
2460 | } | |
2461 | ||
dc95824a DO |
2462 | /* Scan the RIB table for exactly matching RIB entry. */ |
2463 | rn = route_node_lookup (table, (struct prefix *) p); | |
2464 | ||
2465 | /* No route for this prefix. */ | |
2466 | if (! rn) | |
2467 | { | |
35d921cc TT |
2468 | zlog_debug ("%s: lookup failed for %s", __func__, |
2469 | prefix2str((struct prefix*) p, prefix_buf, sizeof(prefix_buf))); | |
dc95824a DO |
2470 | return; |
2471 | } | |
2472 | ||
2473 | /* Unlock node. */ | |
2474 | route_unlock_node (rn); | |
2475 | ||
2476 | /* let's go */ | |
9fd92e3c | 2477 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2478 | { |
2479 | zlog_debug | |
2480 | ( | |
2481 | "%s: rn %p, rib %p: %s, %s", | |
2482 | __func__, | |
6c4f4e6e DL |
2483 | (void *)rn, |
2484 | (void *)rib, | |
dc95824a DO |
2485 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), |
2486 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2487 | ); | |
f7bf4153 | 2488 | rib_dump (p, rib); |
dc95824a DO |
2489 | } |
2490 | } | |
2491 | ||
20e5ff0a DO |
2492 | /* Check if requested address assignment will fail due to another |
2493 | * route being installed by zebra in FIB already. Take necessary | |
2494 | * actions, if needed: remove such a route from FIB and deSELECT | |
2495 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2496 | */ | |
12f6fb97 | 2497 | void rib_lookup_and_pushup (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
20e5ff0a DO |
2498 | { |
2499 | struct route_table *table; | |
2500 | struct route_node *rn; | |
2501 | struct rib *rib; | |
2502 | unsigned changed = 0; | |
2503 | ||
12f6fb97 | 2504 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id))) |
20e5ff0a | 2505 | { |
b72ede27 | 2506 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2507 | return; |
2508 | } | |
2509 | ||
2510 | /* No matches would be the simplest case. */ | |
2511 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2512 | return; | |
2513 | ||
2514 | /* Unlock node. */ | |
2515 | route_unlock_node (rn); | |
2516 | ||
2517 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2518 | * the RN into RIBQ head. If the routing message about the new connected | |
2519 | * route (generated by the IP address we are going to assign very soon) | |
2520 | * comes before the RIBQ is processed, the new RIB entry will join | |
2521 | * RIBQ record already on head. This is necessary for proper revalidation | |
2522 | * of the rest of the RIB. | |
2523 | */ | |
9fd92e3c | 2524 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2525 | { |
2526 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2527 | ! RIB_SYSTEM_ROUTE (rib)) | |
2528 | { | |
2529 | changed = 1; | |
2530 | if (IS_ZEBRA_DEBUG_RIB) | |
2531 | { | |
35d921cc TT |
2532 | char buf[PREFIX_STRLEN]; |
2533 | zlog_debug ("%u:%s: freeing way for connected prefix", | |
2534 | rib->vrf_id, prefix2str(&rn->p, buf, sizeof(buf))); | |
f7bf4153 | 2535 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2536 | } |
2537 | rib_uninstall (rn, rib); | |
2538 | } | |
2539 | } | |
2540 | if (changed) | |
44e9909d | 2541 | rib_queue_add (rn); |
20e5ff0a DO |
2542 | } |
2543 | ||
718e3744 | 2544 | int |
b4c034b0 DS |
2545 | rib_add_multipath (afi_t afi, safi_t safi, struct prefix *p, |
2546 | struct rib *rib) | |
718e3744 | 2547 | { |
2548 | struct route_table *table; | |
2549 | struct route_node *rn; | |
2550 | struct rib *same; | |
2551 | struct nexthop *nexthop; | |
04b02fda | 2552 | int ret = 0; |
b4c034b0 DS |
2553 | int family; |
2554 | ||
2555 | if (!rib) | |
2556 | return 0; | |
2557 | ||
2558 | if (p->family == AF_INET) | |
2559 | family = AFI_IP; | |
2560 | else | |
2561 | family = AFI_IP6; | |
2562 | ||
718e3744 | 2563 | /* Lookup table. */ |
b4c034b0 | 2564 | table = zebra_vrf_table_with_table_id (family, safi, rib->vrf_id, rib->table); |
718e3744 | 2565 | if (! table) |
2566 | return 0; | |
cddf391b | 2567 | |
718e3744 | 2568 | /* Make it sure prefixlen is applied to the prefix. */ |
b4c034b0 | 2569 | apply_mask (p); |
718e3744 | 2570 | |
2571 | /* Set default distance by route type. */ | |
2572 | if (rib->distance == 0) | |
2573 | { | |
2574 | rib->distance = route_info[rib->type].distance; | |
2575 | ||
2576 | /* iBGP distance is 200. */ | |
2577 | if (rib->type == ZEBRA_ROUTE_BGP | |
2578 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2579 | rib->distance = 200; | |
2580 | } | |
2581 | ||
2582 | /* Lookup route node.*/ | |
b4c034b0 | 2583 | rn = route_node_get (table, p); |
718e3744 | 2584 | |
2585 | /* If same type of route are installed, treat it as a implicit | |
2586 | withdraw. */ | |
9fd92e3c | 2587 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2588 | { |
0b8c4f1d | 2589 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2590 | continue; |
2591 | ||
7c8ff89e DS |
2592 | if (same->type == rib->type && same->instance == rib->instance |
2593 | && same->table == rib->table | |
718e3744 | 2594 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2595 | break; |
718e3744 | 2596 | } |
4d38fdb4 | 2597 | |
718e3744 | 2598 | /* If this route is kernel route, set FIB flag to the route. */ |
2599 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2600 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2601 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2602 | ||
2603 | /* Link new rib to node.*/ | |
41ec9222 | 2604 | if (IS_ZEBRA_DEBUG_RIB) |
2605 | { | |
2606 | char buf[INET6_ADDRSTRLEN]; | |
2607 | if (IS_ZEBRA_DEBUG_RIB) | |
2608 | { | |
b4c034b0 | 2609 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); |
41ec9222 | 2610 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " |
2611 | "existing %p", | |
6c4f4e6e DL |
2612 | rib->vrf_id, buf, p->prefixlen, (void *)rn, |
2613 | (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2614 | } |
2615 | ||
2616 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2617 | rib_dump ((struct prefix *)p, rib); | |
2618 | } | |
2bf26d41 | 2619 | rib_addnode (rn, rib, 1); |
04b02fda | 2620 | ret = 1; |
718e3744 | 2621 | |
718e3744 | 2622 | /* Free implicit route.*/ |
2623 | if (same) | |
dc95824a | 2624 | { |
41ec9222 | 2625 | rib_delnode (rn, same); |
2626 | ret = -1; | |
dc95824a | 2627 | } |
4d38fdb4 | 2628 | |
2629 | route_unlock_node (rn); | |
04b02fda | 2630 | return ret; |
718e3744 | 2631 | } |
2632 | ||
2633 | int | |
616368ed DS |
2634 | rib_delete (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance, |
2635 | int flags, struct prefix *p, union g_addr *gate, ifindex_t ifindex, | |
2636 | u_int32_t table_id) | |
718e3744 | 2637 | { |
2638 | struct route_table *table; | |
2639 | struct route_node *rn; | |
2640 | struct rib *rib; | |
2641 | struct rib *fib = NULL; | |
2642 | struct rib *same = NULL; | |
fa713d9e CF |
2643 | struct nexthop *nexthop, *tnexthop; |
2644 | int recursing; | |
35d921cc | 2645 | char buf1[PREFIX_STRLEN]; |
41ec9222 | 2646 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 2647 | |
2648 | /* Lookup table. */ | |
616368ed | 2649 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2650 | if (! table) |
2651 | return 0; | |
2652 | ||
2653 | /* Apply mask. */ | |
616368ed | 2654 | apply_mask (p); |
718e3744 | 2655 | |
2656 | /* Lookup route node. */ | |
616368ed | 2657 | rn = route_node_lookup (table, p); |
718e3744 | 2658 | if (! rn) |
2659 | { | |
41ec9222 | 2660 | if (IS_ZEBRA_DEBUG_RIB) |
35d921cc TT |
2661 | zlog_debug ("%u:%s: doesn't exist in rib", |
2662 | vrf_id, prefix2str (p, buf1, sizeof(buf1))); | |
718e3744 | 2663 | return ZEBRA_ERR_RTNOEXIST; |
2664 | } | |
2665 | ||
2666 | /* Lookup same type route. */ | |
9fd92e3c | 2667 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2668 | { |
6d691129 PJ |
2669 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2670 | continue; | |
2671 | ||
718e3744 | 2672 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2673 | fib = rib; | |
2674 | ||
ebf1ead0 | 2675 | if (rib->type != type) |
2676 | continue; | |
7c8ff89e DS |
2677 | if (rib->instance != instance) |
2678 | continue; | |
ebf1ead0 | 2679 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2680 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2681 | { |
4f1735fd MF |
2682 | if (nexthop->ifindex != ifindex) |
2683 | continue; | |
ebf1ead0 | 2684 | if (rib->refcnt) |
718e3744 | 2685 | { |
ebf1ead0 | 2686 | rib->refcnt--; |
2687 | route_unlock_node (rn); | |
2688 | route_unlock_node (rn); | |
2689 | return 0; | |
718e3744 | 2690 | } |
ebf1ead0 | 2691 | same = rib; |
2692 | break; | |
718e3744 | 2693 | } |
ebf1ead0 | 2694 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2695 | else |
5ec90d28 | 2696 | { |
fa713d9e CF |
2697 | if (gate == NULL) |
2698 | { | |
2699 | same = rib; | |
2700 | break; | |
2701 | } | |
2702 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
616368ed DS |
2703 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || |
2704 | IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
fa713d9e CF |
2705 | { |
2706 | same = rib; | |
2707 | break; | |
2708 | } | |
2709 | if (same) | |
2710 | break; | |
2711 | } | |
718e3744 | 2712 | } |
718e3744 | 2713 | /* If same type of route can't be found and this message is from |
2714 | kernel. */ | |
2715 | if (! same) | |
2716 | { | |
2037f143 DS |
2717 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2718 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2719 | { | |
41ec9222 | 2720 | if (IS_ZEBRA_DEBUG_RIB) |
2037f143 | 2721 | { |
616368ed | 2722 | zlog_debug ("%u:%s: rn %p, rib %p (type %d) was deleted " |
41ec9222 | 2723 | "from kernel, adding", |
616368ed DS |
2724 | vrf_id, prefix2str(p, buf1, INET6_ADDRSTRLEN), |
2725 | rn, fib, fib->type); | |
2037f143 | 2726 | } |
6baf7bb8 DS |
2727 | if (allow_delete) |
2728 | { | |
2729 | /* Unset flags. */ | |
2730 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2731 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2732 | ||
2733 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2734 | } | |
2735 | else | |
2736 | { | |
2737 | /* This means someone else, other than Zebra, has deleted | |
2738 | * a Zebra router from the kernel. We will add it back */ | |
2739 | rib_install_kernel(rn, fib, 0); | |
2740 | } | |
2037f143 | 2741 | } |
718e3744 | 2742 | else |
2743 | { | |
41ec9222 | 2744 | if (IS_ZEBRA_DEBUG_RIB) |
718e3744 | 2745 | { |
2746 | if (gate) | |
41ec9222 | 2747 | zlog_debug ("%u:%s: via %s ifindex %d type %d " |
78104b9b | 2748 | "doesn't exist in rib", |
35d921cc | 2749 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
616368ed | 2750 | inet_ntop (family2afi(afi), gate, buf2, INET_ADDRSTRLEN), |
35d921cc TT |
2751 | ifindex, |
2752 | type); | |
718e3744 | 2753 | else |
41ec9222 | 2754 | zlog_debug ("%u:%s: ifindex %d type %d doesn't exist in rib", |
35d921cc TT |
2755 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
2756 | ifindex, | |
2757 | type); | |
718e3744 | 2758 | } |
2759 | route_unlock_node (rn); | |
2760 | return ZEBRA_ERR_RTNOEXIST; | |
2761 | } | |
2762 | } | |
4d38fdb4 | 2763 | |
718e3744 | 2764 | if (same) |
4d38fdb4 | 2765 | rib_delnode (rn, same); |
2766 | ||
718e3744 | 2767 | route_unlock_node (rn); |
718e3744 | 2768 | return 0; |
2769 | } | |
6b0655a2 | 2770 | |
718e3744 | 2771 | |
718e3744 | 2772 | |
718e3744 | 2773 | int |
3b1098be DS |
2774 | rib_add (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2775 | u_short instance, int flags, struct prefix *p, | |
2776 | union g_addr *gate, union g_addr *src, ifindex_t ifindex, | |
2777 | u_int32_t table_id, u_int32_t metric, u_int32_t mtu, | |
2778 | u_char distance) | |
718e3744 | 2779 | { |
2780 | struct rib *rib; | |
2781 | struct rib *same = NULL; | |
2782 | struct route_table *table; | |
2783 | struct route_node *rn; | |
2784 | struct nexthop *nexthop; | |
2785 | ||
718e3744 | 2786 | /* Lookup table. */ |
3b1098be | 2787 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2788 | if (! table) |
2789 | return 0; | |
2790 | ||
2791 | /* Make sure mask is applied. */ | |
3b1098be | 2792 | apply_mask (p); |
718e3744 | 2793 | |
2794 | /* Set default distance by route type. */ | |
3b1098be DS |
2795 | if (distance == 0) |
2796 | { | |
2797 | if ((unsigned)type >= array_size(route_info)) | |
2798 | distance = 150; | |
2799 | else | |
2800 | distance = route_info[type].distance; | |
2801 | ||
2802 | /* iBGP distance is 200. */ | |
2803 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2804 | distance = 200; | |
2805 | } | |
718e3744 | 2806 | |
718e3744 | 2807 | /* Lookup route node.*/ |
3b1098be | 2808 | rn = route_node_get (table, p); |
718e3744 | 2809 | |
2810 | /* If same type of route are installed, treat it as a implicit | |
2811 | withdraw. */ | |
9fd92e3c | 2812 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2813 | { |
6d691129 PJ |
2814 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2815 | continue; | |
2816 | ||
ebf1ead0 | 2817 | if (rib->type != type) |
2818 | continue; | |
7c8ff89e DS |
2819 | if (rib->instance != instance) |
2820 | continue; | |
ebf1ead0 | 2821 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 2822 | { |
2823 | same = rib; | |
718e3744 | 2824 | break; |
2825 | } | |
3b1098be | 2826 | /* Duplicate connected route comes in. */ |
ebf1ead0 | 2827 | else if ((nexthop = rib->nexthop) && |
2828 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3b1098be DS |
2829 | nexthop->ifindex == ifindex && |
2830 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2831 | { |
2832 | rib->refcnt++; | |
3b1098be | 2833 | return 0 ; |
ebf1ead0 | 2834 | } |
718e3744 | 2835 | } |
2836 | ||
2837 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2838 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2839 | ||
718e3744 | 2840 | rib->type = type; |
7c8ff89e | 2841 | rib->instance = instance; |
718e3744 | 2842 | rib->distance = distance; |
2843 | rib->flags = flags; | |
2844 | rib->metric = metric; | |
c50ca33a | 2845 | rib->mtu = mtu; |
7a4bb9c5 | 2846 | rib->table = table_id; |
78104b9b | 2847 | rib->vrf_id = vrf_id; |
718e3744 | 2848 | rib->nexthop_num = 0; |
2849 | rib->uptime = time (NULL); | |
2850 | ||
2851 | /* Nexthop settings. */ | |
2852 | if (gate) | |
2853 | { | |
3b1098be DS |
2854 | if (afi == AFI_IP6) |
2855 | { | |
2856 | if (ifindex) | |
2857 | rib_nexthop_ipv6_ifindex_add (rib, &gate->ipv6, ifindex); | |
2858 | else | |
2859 | rib_nexthop_ipv6_add (rib, &gate->ipv6); | |
2860 | } | |
718e3744 | 2861 | else |
3b1098be DS |
2862 | { |
2863 | if (ifindex) | |
2864 | rib_nexthop_ipv4_ifindex_add (rib, &gate->ipv4, &src->ipv4, ifindex); | |
2865 | else | |
2866 | rib_nexthop_ipv4_add (rib, &gate->ipv4, &src->ipv4); | |
2867 | } | |
718e3744 | 2868 | } |
2869 | else | |
a399694f | 2870 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 2871 | |
2872 | /* If this route is kernel route, set FIB flag to the route. */ | |
2873 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2874 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2875 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2876 | ||
2877 | /* Link new rib to node.*/ | |
fed643f4 | 2878 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 2879 | { |
2880 | char buf[INET6_ADDRSTRLEN]; | |
2881 | if (IS_ZEBRA_DEBUG_RIB) | |
2882 | { | |
3b1098be | 2883 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); |
41ec9222 | 2884 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " |
2885 | "existing %p", | |
6c4f4e6e DL |
2886 | vrf_id, buf, p->prefixlen, (void *)rn, |
2887 | (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2888 | } |
2889 | ||
2890 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
3b1098be | 2891 | rib_dump (p, rib); |
41ec9222 | 2892 | } |
2bf26d41 | 2893 | rib_addnode (rn, rib, 1); |
718e3744 | 2894 | |
718e3744 | 2895 | /* Free implicit route.*/ |
2896 | if (same) | |
4d38fdb4 | 2897 | rib_delnode (rn, same); |
2898 | ||
2899 | route_unlock_node (rn); | |
718e3744 | 2900 | return 0; |
2901 | } | |
2902 | ||
1c848137 | 2903 | /* Schedule routes of a particular table (address-family) based on event. */ |
2904 | static void | |
2905 | rib_update_table (struct route_table *table, rib_update_event_t event) | |
b84c7253 | 2906 | { |
2907 | struct route_node *rn; | |
b84c7253 | 2908 | struct rib *rib, *next; |
2909 | ||
1c848137 | 2910 | /* Walk all routes and queue for processing, if appropriate for |
2911 | * the trigger event. | |
2912 | */ | |
2913 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2914 | { | |
2915 | switch (event) | |
2916 | { | |
2917 | case RIB_UPDATE_IF_CHANGE: | |
2918 | /* Examine all routes that won't get processed by the protocol or | |
2919 | * triggered by nexthop evaluation (NHT). This would be system, | |
2920 | * kernel and certain static routes. Note that NHT will get | |
2921 | * triggered upon an interface event as connected routes always | |
2922 | * get queued for processing. | |
2923 | */ | |
2924 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
2925 | { | |
2926 | if (rib->type == ZEBRA_ROUTE_OSPF || | |
2927 | rib->type == ZEBRA_ROUTE_OSPF6 || | |
2928 | rib->type == ZEBRA_ROUTE_BGP) | |
2929 | continue; /* protocol will handle. */ | |
2930 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
2931 | { | |
2932 | struct nexthop *nh; | |
2933 | for (nh = rib->nexthop; nh; nh = nh->next) | |
2934 | if (!(nh->type == NEXTHOP_TYPE_IPV4 || | |
2935 | nh->type == NEXTHOP_TYPE_IPV6)) | |
2936 | break; | |
2937 | ||
2938 | /* If we only have nexthops to a gateway, NHT will | |
2939 | * take care. | |
2940 | */ | |
2941 | if (nh) | |
44e9909d | 2942 | rib_queue_add (rn); |
1c848137 | 2943 | } |
2944 | else | |
44e9909d | 2945 | rib_queue_add (rn); |
1c848137 | 2946 | } |
2947 | break; | |
b84c7253 | 2948 | |
1c848137 | 2949 | case RIB_UPDATE_RMAP_CHANGE: |
2950 | case RIB_UPDATE_OTHER: | |
2951 | /* Right now, examine all routes. Can restrict to a protocol in | |
2952 | * some cases (TODO). | |
2953 | */ | |
2954 | if (rnode_to_ribs (rn)) | |
44e9909d | 2955 | rib_queue_add (rn); |
1c848137 | 2956 | break; |
2957 | ||
2958 | default: | |
2959 | break; | |
2960 | } | |
2961 | } | |
b84c7253 | 2962 | } |
2963 | ||
718e3744 | 2964 | /* RIB update function. */ |
2965 | void | |
1c848137 | 2966 | rib_update (vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 2967 | { |
718e3744 | 2968 | struct route_table *table; |
1c848137 | 2969 | |
2970 | /* Process routes of interested address-families. */ | |
78104b9b | 2971 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 2972 | if (table) |
1c848137 | 2973 | rib_update_table (table, event); |
718e3744 | 2974 | |
78104b9b | 2975 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 2976 | if (table) |
1c848137 | 2977 | rib_update_table (table, event); |
718e3744 | 2978 | } |
2979 | ||
718e3744 | 2980 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 2981 | static void |
718e3744 | 2982 | rib_weed_table (struct route_table *table) |
2983 | { | |
2984 | struct route_node *rn; | |
2985 | struct rib *rib; | |
2986 | struct rib *next; | |
2987 | ||
2988 | if (table) | |
2989 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 2990 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 2991 | { |
6d691129 PJ |
2992 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2993 | continue; | |
2994 | ||
b21b19c5 | 2995 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 2996 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 2997 | rib_delnode (rn, rib); |
718e3744 | 2998 | } |
2999 | } | |
3000 | ||
3001 | /* Delete all routes from non main table. */ | |
3002 | void | |
a1ac18c4 | 3003 | rib_weed_tables (void) |
718e3744 | 3004 | { |
78104b9b FL |
3005 | vrf_iter_t iter; |
3006 | struct zebra_vrf *zvrf; | |
3007 | ||
3008 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3009 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3010 | { | |
3011 | rib_weed_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3012 | rib_weed_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3013 | } | |
718e3744 | 3014 | } |
6b0655a2 | 3015 | |
718e3744 | 3016 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3017 | static void |
718e3744 | 3018 | rib_sweep_table (struct route_table *table) |
3019 | { | |
3020 | struct route_node *rn; | |
3021 | struct rib *rib; | |
3022 | struct rib *next; | |
3023 | int ret = 0; | |
3024 | ||
3025 | if (table) | |
3026 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3027 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3028 | { |
6d691129 PJ |
3029 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3030 | continue; | |
3031 | ||
718e3744 | 3032 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3033 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3034 | { | |
3035 | ret = rib_uninstall_kernel (rn, rib); | |
3036 | if (! ret) | |
4d38fdb4 | 3037 | rib_delnode (rn, rib); |
718e3744 | 3038 | } |
3039 | } | |
3040 | } | |
3041 | ||
3042 | /* Sweep all RIB tables. */ | |
3043 | void | |
a1ac18c4 | 3044 | rib_sweep_route (void) |
718e3744 | 3045 | { |
78104b9b FL |
3046 | vrf_iter_t iter; |
3047 | struct zebra_vrf *zvrf; | |
3048 | ||
3049 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3050 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3051 | { | |
3052 | rib_sweep_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3053 | rib_sweep_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3054 | } | |
718e3744 | 3055 | } |
2ea1ab1c VT |
3056 | |
3057 | /* Remove specific by protocol routes from 'table'. */ | |
3058 | static unsigned long | |
7c8ff89e | 3059 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3060 | { |
3061 | struct route_node *rn; | |
3062 | struct rib *rib; | |
3063 | struct rib *next; | |
3064 | unsigned long n = 0; | |
3065 | ||
3066 | if (table) | |
3067 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3068 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3069 | { |
2ea1ab1c VT |
3070 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3071 | continue; | |
7c8ff89e | 3072 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3073 | { |
3074 | rib_delnode (rn, rib); | |
3075 | n++; | |
3076 | } | |
3077 | } | |
3078 | ||
3079 | return n; | |
3080 | } | |
3081 | ||
3082 | /* Remove specific by protocol routes. */ | |
3083 | unsigned long | |
7c8ff89e | 3084 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3085 | { |
78104b9b FL |
3086 | vrf_iter_t iter; |
3087 | struct zebra_vrf *zvrf; | |
3088 | unsigned long cnt = 0; | |
3089 | ||
3090 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3091 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3092 | cnt += rib_score_proto_table (proto, instance, zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3093 | +rib_score_proto_table (proto, instance, zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3094 | ||
3095 | return cnt; | |
2ea1ab1c VT |
3096 | } |
3097 | ||
718e3744 | 3098 | /* Close RIB and clean up kernel routes. */ |
a31c5886 | 3099 | void |
718e3744 | 3100 | rib_close_table (struct route_table *table) |
3101 | { | |
3102 | struct route_node *rn; | |
416ec78d | 3103 | rib_table_info_t *info = table->info; |
718e3744 | 3104 | struct rib *rib; |
3105 | ||
3106 | if (table) | |
3107 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3108 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3109 | { |
9fd92e3c AS |
3110 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3111 | continue; | |
3112 | ||
416ec78d DL |
3113 | if (info->safi == SAFI_UNICAST) |
3114 | zfpm_trigger_update (rn, NULL); | |
5adc2528 | 3115 | |
9fd92e3c AS |
3116 | if (! RIB_SYSTEM_ROUTE (rib)) |
3117 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3118 | } |
718e3744 | 3119 | } |
3120 | ||
3121 | /* Close all RIB tables. */ | |
3122 | void | |
a1ac18c4 | 3123 | rib_close (void) |
718e3744 | 3124 | { |
78104b9b FL |
3125 | vrf_iter_t iter; |
3126 | struct zebra_vrf *zvrf; | |
3127 | struct listnode *node; | |
5c610faf | 3128 | struct interface *ifp; |
6678277c | 3129 | u_int32_t table_id; |
5c610faf | 3130 | |
78104b9b FL |
3131 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) |
3132 | { | |
3133 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3134 | { | |
3135 | rib_close_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3136 | rib_close_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3137 | } | |
3138 | for (ALL_LIST_ELEMENTS_RO (vrf_iter2iflist (iter), node, ifp)) | |
3139 | if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp); | |
3140 | } | |
6678277c DS |
3141 | |
3142 | /* If we do multiple tables per vrf, need to move this to loop above */ | |
3143 | zvrf = vrf_info_lookup (VRF_DEFAULT); | |
3144 | ||
3145 | for (table_id = 0; table_id < ZEBRA_KERNEL_TABLE_MAX; table_id++) | |
3146 | { | |
3147 | if (zvrf->other_table[AFI_IP][table_id]) | |
3148 | rib_close_table (zvrf->other_table[AFI_IP][table_id]); | |
3149 | ||
3150 | if (zvrf->other_table[AFI_IP6][table_id]) | |
3151 | rib_close_table (zvrf->other_table[AFI_IP6][table_id]); | |
3152 | } | |
40c7bdb0 | 3153 | |
3154 | zebra_mpls_close_tables(zvrf); | |
3155 | ||
718e3744 | 3156 | } |
6b0655a2 | 3157 | |
718e3744 | 3158 | /* Routing information base initialize. */ |
3159 | void | |
a1ac18c4 | 3160 | rib_init (void) |
718e3744 | 3161 | { |
4d38fdb4 | 3162 | rib_queue_init (&zebrad); |
718e3744 | 3163 | } |
0915bb0c AS |
3164 | |
3165 | /* | |
3166 | * vrf_id_get_next | |
3167 | * | |
3168 | * Get the first vrf id that is greater than the given vrf id if any. | |
3169 | * | |
3170 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3171 | */ | |
3172 | static inline int | |
b72ede27 | 3173 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3174 | { |
b72ede27 FL |
3175 | vrf_iter_t iter = vrf_iterator (vrf_id); |
3176 | struct zebra_vrf *zvrf = vrf_iter2info (iter); | |
3177 | ||
3178 | /* The same one ? Then find out the next. */ | |
3179 | if (zvrf && (zvrf->vrf_id == vrf_id)) | |
3180 | zvrf = vrf_iter2info (vrf_next (iter)); | |
3181 | ||
3182 | if (zvrf) | |
0915bb0c | 3183 | { |
b72ede27 FL |
3184 | *next_id_p = zvrf->vrf_id; |
3185 | return 1; | |
0915bb0c AS |
3186 | } |
3187 | ||
3188 | return 0; | |
3189 | } | |
3190 | ||
3191 | /* | |
3192 | * rib_tables_iter_next | |
3193 | * | |
3194 | * Returns the next table in the iteration. | |
3195 | */ | |
3196 | struct route_table * | |
3197 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
3198 | { | |
3199 | struct route_table *table; | |
3200 | ||
3201 | /* | |
3202 | * Array that helps us go over all AFI/SAFI combinations via one | |
3203 | * index. | |
3204 | */ | |
3205 | static struct { | |
3206 | afi_t afi; | |
3207 | safi_t safi; | |
3208 | } afi_safis[] = { | |
3209 | { AFI_IP, SAFI_UNICAST }, | |
3210 | { AFI_IP, SAFI_MULTICAST }, | |
3211 | { AFI_IP6, SAFI_UNICAST }, | |
3212 | { AFI_IP6, SAFI_MULTICAST }, | |
3213 | }; | |
3214 | ||
3215 | table = NULL; | |
3216 | ||
3217 | switch (iter->state) | |
3218 | { | |
3219 | ||
3220 | case RIB_TABLES_ITER_S_INIT: | |
9c2bf1cf | 3221 | iter->vrf_id = VRF_DEFAULT; |
0915bb0c AS |
3222 | iter->afi_safi_ix = -1; |
3223 | ||
3224 | /* Fall through */ | |
3225 | ||
3226 | case RIB_TABLES_ITER_S_ITERATING: | |
3227 | iter->afi_safi_ix++; | |
3228 | while (1) | |
3229 | { | |
3230 | ||
3231 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
3232 | { | |
b72ede27 | 3233 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
3234 | afi_safis[iter->afi_safi_ix].safi, |
3235 | iter->vrf_id); | |
3236 | if (table) | |
3237 | break; | |
3238 | ||
3239 | iter->afi_safi_ix++; | |
3240 | } | |
3241 | ||
3242 | /* | |
3243 | * Found another table in this vrf. | |
3244 | */ | |
3245 | if (table) | |
3246 | break; | |
3247 | ||
3248 | /* | |
3249 | * Done with all tables in the current vrf, go to the next | |
3250 | * one. | |
3251 | */ | |
3252 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
3253 | break; | |
3254 | ||
3255 | iter->afi_safi_ix = 0; | |
3256 | } | |
3257 | ||
3258 | break; | |
3259 | ||
3260 | case RIB_TABLES_ITER_S_DONE: | |
3261 | return NULL; | |
3262 | } | |
3263 | ||
3264 | if (table) | |
3265 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3266 | else | |
3267 | iter->state = RIB_TABLES_ITER_S_DONE; | |
3268 | ||
3269 | return table; | |
3270 | } | |
b72ede27 | 3271 |