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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "table.h" | |
26 | #include "memory.h" | |
27 | #include "str.h" | |
28 | #include "command.h" | |
29 | #include "if.h" | |
30 | #include "log.h" | |
31 | #include "sockunion.h" | |
4d38fdb4 | 32 | #include "linklist.h" |
33 | #include "thread.h" | |
34 | #include "workqueue.h" | |
7514fb77 PJ |
35 | #include "prefix.h" |
36 | #include "routemap.h" | |
fb018d25 | 37 | #include "nexthop.h" |
b72ede27 | 38 | #include "vrf.h" |
718e3744 | 39 | |
40 | #include "zebra/rib.h" | |
41 | #include "zebra/rt.h" | |
7c551956 | 42 | #include "zebra/zebra_ns.h" |
718e3744 | 43 | #include "zebra/zserv.h" |
7c551956 | 44 | #include "zebra/zebra_vrf.h" |
718e3744 | 45 | #include "zebra/redistribute.h" |
8902474b | 46 | #include "zebra/zebra_routemap.h" |
718e3744 | 47 | #include "zebra/debug.h" |
5adc2528 | 48 | #include "zebra/zebra_fpm.h" |
fb018d25 | 49 | #include "zebra/zebra_rnh.h" |
88177fe3 | 50 | #include "zebra/interface.h" |
d44ca835 | 51 | #include "zebra/connected.h" |
718e3744 | 52 | |
6baf7bb8 DS |
53 | /* Should we allow non Quagga processes to delete our routes */ |
54 | extern int allow_delete; | |
55 | ||
457eb9af PJ |
56 | /* Hold time for RIB process, should be very minimal. |
57 | * it is useful to able to set it otherwise for testing, hence exported | |
58 | * as global here for test-rig code. | |
59 | */ | |
60 | int rib_process_hold_time = 10; | |
61 | ||
718e3744 | 62 | /* Each route type's string and default distance value. */ |
d145bc00 | 63 | static const struct |
718e3744 | 64 | { |
65 | int key; | |
66 | int distance; | |
5734509c | 67 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 68 | { |
5734509c PJ |
69 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
70 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
71 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
72 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
73 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
74 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
75 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
76 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
77 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
78 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
7052f228 | 79 | /* no entry/default: 150 */ |
718e3744 | 80 | }; |
6b0655a2 | 81 | |
2263a412 DL |
82 | static void |
83 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, int priority, | |
84 | const char *msgfmt, ...) | |
85 | { | |
86 | char buf[INET6_ADDRSTRLEN + 4], *bptr; | |
87 | char msgbuf[512]; | |
88 | va_list ap; | |
89 | ||
90 | va_start(ap, msgfmt); | |
91 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
92 | va_end(ap); | |
93 | ||
94 | if (rn) | |
95 | { | |
cb653491 DL |
96 | rib_table_info_t *info = rn->table->info; |
97 | ||
2263a412 DL |
98 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
99 | bptr = buf + strlen(buf); | |
cb653491 DL |
100 | snprintf(bptr, buf + sizeof(buf) - bptr, "/%d%s", rn->p.prefixlen, |
101 | info->safi == SAFI_MULTICAST ? " (MRIB)" : ""); | |
2263a412 DL |
102 | } |
103 | else | |
104 | { | |
105 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
106 | } | |
107 | ||
108 | zlog (NULL, priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); | |
109 | } | |
110 | ||
111 | #define rnode_debug(node, vrf_id, ...) \ | |
112 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) | |
113 | #define rnode_info(node, ...) \ | |
114 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) | |
115 | ||
7a4bb9c5 DS |
116 | int |
117 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
118 | { | |
119 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX) || | |
120 | (table_id == RT_TABLE_UNSPEC) || | |
121 | (table_id == RT_TABLE_LOCAL) || | |
122 | (table_id == RT_TABLE_COMPAT)) | |
123 | return 0; | |
124 | else | |
125 | return 1; | |
126 | } | |
127 | ||
128 | int | |
129 | is_zebra_main_routing_table(u_int32_t table_id) | |
130 | { | |
131 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
132 | return 1; | |
133 | return 0; | |
134 | } | |
135 | ||
0aabccc0 DD |
136 | int |
137 | zebra_check_addr (struct prefix *p) | |
138 | { | |
139 | if (p->family == AF_INET) | |
140 | { | |
141 | u_int32_t addr; | |
142 | ||
143 | addr = p->u.prefix4.s_addr; | |
144 | addr = ntohl (addr); | |
145 | ||
146 | if (IPV4_NET127 (addr) | |
147 | || IN_CLASSD (addr) | |
148 | || IPV4_LINKLOCAL(addr)) | |
149 | return 0; | |
150 | } | |
0aabccc0 DD |
151 | if (p->family == AF_INET6) |
152 | { | |
153 | if (IN6_IS_ADDR_LOOPBACK (&p->u.prefix6)) | |
154 | return 0; | |
155 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
156 | return 0; | |
157 | } | |
0aabccc0 DD |
158 | return 1; |
159 | } | |
160 | ||
fa713d9e | 161 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 162 | void |
a399694f | 163 | rib_nexthop_add (struct rib *rib, struct nexthop *nexthop) |
fa713d9e | 164 | { |
a399694f | 165 | nexthop_add(&rib->nexthop, nexthop); |
718e3744 | 166 | rib->nexthop_num++; |
167 | } | |
168 | ||
6e26278c | 169 | |
6e26278c DS |
170 | |
171 | /** | |
172 | * copy_nexthop - copy a nexthop to the rib structure. | |
173 | */ | |
174 | void | |
a399694f | 175 | rib_copy_nexthops (struct rib *rib, struct nexthop *nh) |
6e26278c DS |
176 | { |
177 | struct nexthop *nexthop; | |
178 | ||
179 | nexthop = nexthop_new(); | |
180 | nexthop->flags = nh->flags; | |
181 | nexthop->type = nh->type; | |
182 | nexthop->ifindex = nh->ifindex; | |
6e26278c DS |
183 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); |
184 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
a399694f | 185 | rib_nexthop_add(rib, nexthop); |
6e26278c | 186 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) |
a399694f | 187 | copy_nexthops(&nexthop->resolved, nh->resolved); |
6e26278c DS |
188 | } |
189 | ||
718e3744 | 190 | /* Delete specified nexthop from the list. */ |
a1ac18c4 | 191 | static void |
a399694f | 192 | rib_nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
718e3744 | 193 | { |
194 | if (nexthop->next) | |
195 | nexthop->next->prev = nexthop->prev; | |
196 | if (nexthop->prev) | |
197 | nexthop->prev->next = nexthop->next; | |
198 | else | |
199 | rib->nexthop = nexthop->next; | |
200 | rib->nexthop_num--; | |
201 | } | |
202 | ||
fa713d9e | 203 | |
fa713d9e | 204 | |
718e3744 | 205 | struct nexthop * |
a399694f | 206 | rib_nexthop_ifindex_add (struct rib *rib, unsigned int ifindex) |
718e3744 | 207 | { |
208 | struct nexthop *nexthop; | |
209 | ||
a399694f | 210 | nexthop = nexthop_new(); |
718e3744 | 211 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
212 | nexthop->ifindex = ifindex; | |
213 | ||
a399694f | 214 | rib_nexthop_add (rib, nexthop); |
718e3744 | 215 | |
216 | return nexthop; | |
217 | } | |
218 | ||
718e3744 | 219 | struct nexthop * |
a399694f | 220 | rib_nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 221 | { |
222 | struct nexthop *nexthop; | |
223 | ||
a399694f | 224 | nexthop = nexthop_new(); |
718e3744 | 225 | nexthop->type = NEXTHOP_TYPE_IPV4; |
226 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
227 | if (src) |
228 | nexthop->src.ipv4 = *src; | |
718e3744 | 229 | |
a399694f | 230 | rib_nexthop_add (rib, nexthop); |
718e3744 | 231 | |
232 | return nexthop; | |
233 | } | |
234 | ||
26e2ae36 | 235 | struct nexthop * |
a399694f DS |
236 | rib_nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
237 | struct in_addr *src, unsigned int ifindex) | |
718e3744 | 238 | { |
239 | struct nexthop *nexthop; | |
d44ca835 | 240 | struct interface *ifp; |
718e3744 | 241 | |
a399694f | 242 | nexthop = nexthop_new(); |
718e3744 | 243 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
244 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
245 | if (src) |
246 | nexthop->src.ipv4 = *src; | |
718e3744 | 247 | nexthop->ifindex = ifindex; |
d44ca835 | 248 | ifp = if_lookup_by_index (nexthop->ifindex); |
12f6fb97 DS |
249 | /*Pending: need to think if null ifp here is ok during bootup? |
250 | There was a crash because ifp here was coming to be NULL */ | |
251 | if (ifp) | |
d44ca835 DS |
252 | if (connected_is_unnumbered(ifp)) { |
253 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
254 | } | |
718e3744 | 255 | |
a399694f | 256 | rib_nexthop_add (rib, nexthop); |
718e3744 | 257 | |
258 | return nexthop; | |
259 | } | |
260 | ||
718e3744 | 261 | struct nexthop * |
a399694f | 262 | rib_nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) |
718e3744 | 263 | { |
264 | struct nexthop *nexthop; | |
265 | ||
a399694f | 266 | nexthop = nexthop_new(); |
718e3744 | 267 | nexthop->type = NEXTHOP_TYPE_IPV6; |
268 | nexthop->gate.ipv6 = *ipv6; | |
269 | ||
a399694f | 270 | rib_nexthop_add (rib, nexthop); |
718e3744 | 271 | |
272 | return nexthop; | |
273 | } | |
274 | ||
41fc2714 | 275 | struct nexthop * |
a399694f DS |
276 | rib_nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
277 | unsigned int ifindex) | |
718e3744 | 278 | { |
279 | struct nexthop *nexthop; | |
280 | ||
393deb9b | 281 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 282 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
283 | nexthop->gate.ipv6 = *ipv6; | |
284 | nexthop->ifindex = ifindex; | |
285 | ||
a399694f | 286 | rib_nexthop_add (rib, nexthop); |
718e3744 | 287 | |
288 | return nexthop; | |
289 | } | |
718e3744 | 290 | |
595db7f1 | 291 | struct nexthop * |
a399694f | 292 | rib_nexthop_blackhole_add (struct rib *rib) |
595db7f1 | 293 | { |
294 | struct nexthop *nexthop; | |
295 | ||
a399694f | 296 | nexthop = nexthop_new(); |
595db7f1 | 297 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
298 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
299 | ||
a399694f | 300 | rib_nexthop_add (rib, nexthop); |
595db7f1 | 301 | |
302 | return nexthop; | |
303 | } | |
304 | ||
fa713d9e CF |
305 | /* This method checks whether a recursive nexthop has at |
306 | * least one resolved nexthop in the fib. | |
307 | */ | |
308 | int | |
309 | nexthop_has_fib_child(struct nexthop *nexthop) | |
310 | { | |
311 | struct nexthop *nh; | |
312 | ||
313 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
314 | return 0; | |
315 | ||
316 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
317 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
318 | return 1; | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
718e3744 | 323 | /* If force flag is not set, do not modify falgs at all for uninstall |
324 | the route from FIB. */ | |
a1ac18c4 | 325 | static int |
718e3744 | 326 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
327 | struct route_node *top) | |
328 | { | |
329 | struct prefix_ipv4 p; | |
330 | struct route_table *table; | |
331 | struct route_node *rn; | |
332 | struct rib *match; | |
fa713d9e | 333 | int resolved; |
6e26278c | 334 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 335 | struct nexthop *resolved_hop; |
6e26278c | 336 | int recursing = 0; |
c8a1cb5c | 337 | struct interface *ifp; |
718e3744 | 338 | |
339 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
340 | nexthop->ifindex = 0; | |
341 | ||
342 | if (set) | |
fa713d9e CF |
343 | { |
344 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 345 | zebra_deregister_rnh_static_nexthops(rib->vrf_id, nexthop->resolved, top); |
a399694f | 346 | nexthops_free(nexthop->resolved); |
fa713d9e CF |
347 | nexthop->resolved = NULL; |
348 | } | |
718e3744 | 349 | |
6e26278c DS |
350 | /* Skip nexthops that have been filtered out due to route-map */ |
351 | /* The nexthops are specific to this route and so the same */ | |
352 | /* nexthop for a different route may not have this flag set */ | |
353 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
354 | return 0; | |
355 | ||
d44ca835 DS |
356 | /* |
357 | * Check to see if we should trust the passed in information | |
358 | * for UNNUMBERED interfaces as that we won't find the GW | |
359 | * address in the routing table. | |
c8a1cb5c DS |
360 | */ |
361 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
362 | { | |
363 | ifp = if_lookup_by_index (nexthop->ifindex); | |
d44ca835 DS |
364 | if (ifp && connected_is_unnumbered(ifp)) |
365 | { | |
366 | if (if_is_operative(ifp)) | |
367 | return 1; | |
368 | else | |
369 | return 0; | |
370 | } | |
c8a1cb5c DS |
371 | else |
372 | return 0; | |
373 | } | |
374 | ||
718e3744 | 375 | /* Make lookup prefix. */ |
376 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
377 | p.family = AF_INET; | |
378 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
379 | p.prefix = nexthop->gate.ipv4; | |
380 | ||
381 | /* Lookup table. */ | |
78104b9b | 382 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 383 | if (! table) |
384 | return 0; | |
385 | ||
386 | rn = route_node_match (table, (struct prefix *) &p); | |
387 | while (rn) | |
388 | { | |
389 | route_unlock_node (rn); | |
390 | ||
a50c107e | 391 | /* If lookup self prefix return immediately. */ |
718e3744 | 392 | if (rn == top) |
393 | return 0; | |
394 | ||
395 | /* Pick up selected route. */ | |
18ff3edd DS |
396 | /* However, do not resolve over default route unless explicitly allowed. */ |
397 | if (is_default_prefix (&rn->p) && | |
398 | !nh_resolve_via_default (p.family)) | |
399 | return 0; | |
400 | ||
9fd92e3c | 401 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
402 | { |
403 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
404 | continue; | |
405 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
406 | break; | |
407 | } | |
718e3744 | 408 | |
409 | /* If there is no selected route or matched route is EGP, go up | |
410 | tree. */ | |
6e26278c | 411 | if (! match) |
718e3744 | 412 | { |
413 | do { | |
414 | rn = rn->parent; | |
415 | } while (rn && rn->info == NULL); | |
416 | if (rn) | |
417 | route_lock_node (rn); | |
418 | } | |
419 | else | |
420 | { | |
48a53dc7 CF |
421 | /* If the longest prefix match for the nexthop yields |
422 | * a blackhole, mark it as inactive. */ | |
423 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
424 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
425 | return 0; | |
426 | ||
718e3744 | 427 | if (match->type == ZEBRA_ROUTE_CONNECT) |
428 | { | |
429 | /* Directly point connected route. */ | |
430 | newhop = match->nexthop; | |
431 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
432 | nexthop->ifindex = newhop->ifindex; | |
433 | ||
434 | return 1; | |
435 | } | |
436 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
437 | { | |
fa713d9e | 438 | resolved = 0; |
718e3744 | 439 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
440 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
441 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
442 | { | |
443 | if (set) | |
444 | { | |
445 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 446 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
447 | |
448 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
449 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
450 | /* If the resolving route specifies a gateway, use it */ |
451 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 452 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
c3e6b595 CF |
453 | { |
454 | resolved_hop->type = newhop->type; | |
455 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
456 | ||
457 | if (newhop->ifindex) | |
458 | { | |
459 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
460 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
461 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
462 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
463 | } |
464 | } | |
465 | ||
466 | /* If the resolving route is an interface route, | |
467 | * it means the gateway we are looking up is connected | |
468 | * to that interface. (The actual network is _not_ onlink). | |
469 | * Therefore, the resolved route should have the original | |
470 | * gateway as nexthop as it is directly connected. | |
471 | * | |
472 | * On Linux, we have to set the onlink netlink flag because | |
473 | * otherwise, the kernel won't accept the route. */ | |
3ee39b5b | 474 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
475 | { |
476 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
477 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
478 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
479 | resolved_hop->ifindex = newhop->ifindex; | |
480 | } | |
fa713d9e | 481 | |
a399694f | 482 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
483 | } |
484 | resolved = 1; | |
485 | } | |
486 | return resolved; | |
487 | } | |
488 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
489 | { | |
490 | resolved = 0; | |
491 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
492 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
493 | { | |
494 | if (set) | |
495 | { | |
496 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
497 | ||
498 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
499 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
500 | /* If the resolving route specifies a gateway, use it */ | |
501 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 502 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
6e26278c DS |
503 | { |
504 | resolved_hop->type = newhop->type; | |
505 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
506 | ||
507 | if (newhop->ifindex) | |
508 | { | |
509 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
510 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
511 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
512 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
513 | } |
514 | } | |
515 | ||
516 | /* If the resolving route is an interface route, | |
517 | * it means the gateway we are looking up is connected | |
518 | * to that interface. (The actual network is _not_ onlink). | |
519 | * Therefore, the resolved route should have the original | |
520 | * gateway as nexthop as it is directly connected. | |
521 | * | |
522 | * On Linux, we have to set the onlink netlink flag because | |
523 | * otherwise, the kernel won't accept the route. | |
524 | */ | |
3ee39b5b | 525 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
526 | { |
527 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
528 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
529 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
530 | resolved_hop->ifindex = newhop->ifindex; | |
531 | } | |
532 | ||
a399694f | 533 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 534 | } |
fa713d9e | 535 | resolved = 1; |
718e3744 | 536 | } |
fa713d9e | 537 | return resolved; |
718e3744 | 538 | } |
539 | else | |
540 | { | |
541 | return 0; | |
542 | } | |
543 | } | |
544 | } | |
545 | return 0; | |
546 | } | |
547 | ||
718e3744 | 548 | /* If force flag is not set, do not modify falgs at all for uninstall |
549 | the route from FIB. */ | |
a1ac18c4 | 550 | static int |
718e3744 | 551 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
552 | struct route_node *top) | |
553 | { | |
554 | struct prefix_ipv6 p; | |
555 | struct route_table *table; | |
556 | struct route_node *rn; | |
557 | struct rib *match; | |
fa713d9e | 558 | int resolved; |
6e26278c DS |
559 | struct nexthop *newhop, *tnewhop; |
560 | int recursing = 0; | |
fa713d9e | 561 | struct nexthop *resolved_hop; |
718e3744 | 562 | |
563 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
564 | nexthop->ifindex = 0; | |
565 | ||
566 | if (set) | |
fa713d9e CF |
567 | { |
568 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 569 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, nexthop->resolved, top); |
a399694f | 570 | nexthops_free(nexthop->resolved); |
fa713d9e CF |
571 | nexthop->resolved = NULL; |
572 | } | |
718e3744 | 573 | |
6e26278c DS |
574 | /* Skip nexthops that have been filtered out due to route-map */ |
575 | /* The nexthops are specific to this route and so the same */ | |
576 | /* nexthop for a different route may not have this flag set */ | |
577 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
578 | return 0; | |
579 | ||
718e3744 | 580 | /* Make lookup prefix. */ |
581 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
582 | p.family = AF_INET6; | |
583 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
584 | p.prefix = nexthop->gate.ipv6; | |
585 | ||
586 | /* Lookup table. */ | |
78104b9b | 587 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 588 | if (! table) |
589 | return 0; | |
590 | ||
591 | rn = route_node_match (table, (struct prefix *) &p); | |
592 | while (rn) | |
593 | { | |
594 | route_unlock_node (rn); | |
595 | ||
a50c107e | 596 | /* If lookup self prefix return immediately. */ |
718e3744 | 597 | if (rn == top) |
598 | return 0; | |
599 | ||
600 | /* Pick up selected route. */ | |
18ff3edd DS |
601 | /* However, do not resolve over default route unless explicitly allowed. */ |
602 | if (is_default_prefix (&rn->p) && | |
603 | !nh_resolve_via_default (p.family)) | |
604 | return 0; | |
605 | ||
9fd92e3c | 606 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
607 | { |
608 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
609 | continue; | |
610 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
611 | break; | |
612 | } | |
718e3744 | 613 | |
614 | /* If there is no selected route or matched route is EGP, go up | |
615 | tree. */ | |
6e26278c | 616 | if (! match) |
718e3744 | 617 | { |
618 | do { | |
619 | rn = rn->parent; | |
620 | } while (rn && rn->info == NULL); | |
621 | if (rn) | |
622 | route_lock_node (rn); | |
623 | } | |
624 | else | |
625 | { | |
48a53dc7 CF |
626 | /* If the longest prefix match for the nexthop yields |
627 | * a blackhole, mark it as inactive. */ | |
628 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
629 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
630 | return 0; | |
631 | ||
718e3744 | 632 | if (match->type == ZEBRA_ROUTE_CONNECT) |
633 | { | |
634 | /* Directly point connected route. */ | |
635 | newhop = match->nexthop; | |
636 | ||
637 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
638 | nexthop->ifindex = newhop->ifindex; | |
639 | ||
640 | return 1; | |
641 | } | |
642 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
643 | { | |
fa713d9e | 644 | resolved = 0; |
718e3744 | 645 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
646 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
647 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
648 | { |
649 | if (set) | |
650 | { | |
651 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
652 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
653 | ||
654 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
655 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
656 | /* See nexthop_active_ipv4 for a description how the | |
657 | * resolved nexthop is constructed. */ | |
658 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
3ee39b5b | 659 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
6e26278c DS |
660 | { |
661 | resolved_hop->type = newhop->type; | |
662 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
663 | ||
664 | if (newhop->ifindex) | |
665 | { | |
666 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
667 | resolved_hop->ifindex = newhop->ifindex; | |
668 | } | |
669 | } | |
670 | ||
3ee39b5b | 671 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
672 | { |
673 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
674 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
675 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
676 | resolved_hop->ifindex = newhop->ifindex; | |
677 | } | |
678 | ||
a399694f | 679 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
680 | } |
681 | resolved = 1; | |
682 | } | |
683 | return resolved; | |
684 | } | |
685 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
686 | { | |
687 | resolved = 0; | |
688 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
689 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 690 | { |
691 | if (set) | |
692 | { | |
693 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
694 | |
695 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
696 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
697 | /* See nexthop_active_ipv4 for a description how the |
698 | * resolved nexthop is constructed. */ | |
718e3744 | 699 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
3ee39b5b | 700 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
c3e6b595 CF |
701 | { |
702 | resolved_hop->type = newhop->type; | |
703 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
704 | ||
705 | if (newhop->ifindex) | |
706 | { | |
707 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
708 | resolved_hop->ifindex = newhop->ifindex; | |
709 | } | |
710 | } | |
fa713d9e | 711 | |
3ee39b5b | 712 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
713 | { |
714 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
715 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
716 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
717 | resolved_hop->ifindex = newhop->ifindex; | |
718 | } | |
fa713d9e | 719 | |
a399694f | 720 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 721 | } |
fa713d9e | 722 | resolved = 1; |
718e3744 | 723 | } |
fa713d9e | 724 | return resolved; |
718e3744 | 725 | } |
726 | else | |
727 | { | |
728 | return 0; | |
729 | } | |
730 | } | |
731 | } | |
732 | return 0; | |
733 | } | |
718e3744 | 734 | |
735 | struct rib * | |
33550aa8 DL |
736 | rib_match_ipv4 (struct in_addr addr, safi_t safi, vrf_id_t vrf_id, |
737 | struct route_node **rn_out) | |
718e3744 | 738 | { |
739 | struct prefix_ipv4 p; | |
740 | struct route_table *table; | |
741 | struct route_node *rn; | |
742 | struct rib *match; | |
fa713d9e CF |
743 | struct nexthop *newhop, *tnewhop; |
744 | int recursing; | |
718e3744 | 745 | |
746 | /* Lookup table. */ | |
492dadb2 | 747 | table = zebra_vrf_table (AFI_IP, safi, vrf_id); |
718e3744 | 748 | if (! table) |
749 | return 0; | |
750 | ||
751 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
752 | p.family = AF_INET; | |
753 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
754 | p.prefix = addr; | |
755 | ||
756 | rn = route_node_match (table, (struct prefix *) &p); | |
757 | ||
758 | while (rn) | |
759 | { | |
760 | route_unlock_node (rn); | |
761 | ||
762 | /* Pick up selected route. */ | |
9fd92e3c | 763 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
764 | { |
765 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
766 | continue; | |
767 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
768 | break; | |
769 | } | |
718e3744 | 770 | |
771 | /* If there is no selected route or matched route is EGP, go up | |
772 | tree. */ | |
6e26278c | 773 | if (! match) |
718e3744 | 774 | { |
775 | do { | |
776 | rn = rn->parent; | |
777 | } while (rn && rn->info == NULL); | |
778 | if (rn) | |
779 | route_lock_node (rn); | |
780 | } | |
781 | else | |
782 | { | |
33550aa8 | 783 | if (match->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 784 | { |
33550aa8 | 785 | int found = 0; |
fa713d9e | 786 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 787 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
33550aa8 DL |
788 | { |
789 | found = 1; | |
790 | break; | |
791 | } | |
792 | if (!found) | |
793 | return NULL; | |
718e3744 | 794 | } |
33550aa8 DL |
795 | |
796 | if (rn_out) | |
797 | *rn_out = rn; | |
798 | return match; | |
718e3744 | 799 | } |
800 | } | |
801 | return NULL; | |
802 | } | |
803 | ||
804 | struct rib * | |
78104b9b | 805 | rib_lookup_ipv4 (struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 806 | { |
807 | struct route_table *table; | |
808 | struct route_node *rn; | |
809 | struct rib *match; | |
fa713d9e CF |
810 | struct nexthop *nexthop, *tnexthop; |
811 | int recursing; | |
718e3744 | 812 | |
813 | /* Lookup table. */ | |
78104b9b | 814 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 815 | if (! table) |
816 | return 0; | |
817 | ||
818 | rn = route_node_lookup (table, (struct prefix *) p); | |
819 | ||
820 | /* No route for this prefix. */ | |
821 | if (! rn) | |
822 | return NULL; | |
823 | ||
824 | /* Unlock node. */ | |
825 | route_unlock_node (rn); | |
826 | ||
9fd92e3c | 827 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
828 | { |
829 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
830 | continue; | |
831 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
832 | break; | |
833 | } | |
718e3744 | 834 | |
6e26278c | 835 | if (! match) |
718e3744 | 836 | return NULL; |
837 | ||
838 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
839 | return match; | |
840 | ||
fa713d9e | 841 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 842 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
843 | return match; | |
844 | ||
845 | return NULL; | |
846 | } | |
847 | ||
dc95824a DO |
848 | /* |
849 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
850 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
851 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
852 | * | |
853 | * Return values: | |
854 | * -1: error | |
855 | * 0: exact match found | |
856 | * 1: a match was found with a different gate | |
857 | * 2: connected route found | |
858 | * 3: no matches found | |
859 | */ | |
860 | int | |
78104b9b FL |
861 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate, |
862 | vrf_id_t vrf_id) | |
dc95824a DO |
863 | { |
864 | struct route_table *table; | |
865 | struct route_node *rn; | |
866 | struct rib *match; | |
fa713d9e CF |
867 | struct nexthop *nexthop, *tnexthop; |
868 | int recursing; | |
869 | int nexthops_active; | |
dc95824a DO |
870 | |
871 | /* Lookup table. */ | |
78104b9b | 872 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
873 | if (! table) |
874 | return ZEBRA_RIB_LOOKUP_ERROR; | |
875 | ||
876 | /* Scan the RIB table for exactly matching RIB entry. */ | |
877 | rn = route_node_lookup (table, (struct prefix *) p); | |
878 | ||
879 | /* No route for this prefix. */ | |
880 | if (! rn) | |
881 | return ZEBRA_RIB_NOTFOUND; | |
882 | ||
883 | /* Unlock node. */ | |
884 | route_unlock_node (rn); | |
885 | ||
886 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 887 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
888 | { |
889 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
890 | continue; | |
891 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
892 | break; | |
893 | } | |
dc95824a DO |
894 | |
895 | /* None such found :( */ | |
896 | if (!match) | |
897 | return ZEBRA_RIB_NOTFOUND; | |
898 | ||
899 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
900 | return ZEBRA_RIB_FOUND_CONNECTED; | |
901 | ||
902 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
903 | nexthops_active = 0; |
904 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 905 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 906 | { |
fa713d9e CF |
907 | nexthops_active = 1; |
908 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
909 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 910 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
911 | { |
912 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
913 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
914 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
915 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
916 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
917 | } | |
dc95824a | 918 | } |
fa713d9e CF |
919 | |
920 | if (nexthops_active) | |
921 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
922 | |
923 | return ZEBRA_RIB_NOTFOUND; | |
924 | } | |
925 | ||
718e3744 | 926 | struct rib * |
78104b9b | 927 | rib_match_ipv6 (struct in6_addr *addr, vrf_id_t vrf_id) |
718e3744 | 928 | { |
929 | struct prefix_ipv6 p; | |
930 | struct route_table *table; | |
931 | struct route_node *rn; | |
932 | struct rib *match; | |
fa713d9e CF |
933 | struct nexthop *newhop, *tnewhop; |
934 | int recursing; | |
718e3744 | 935 | |
936 | /* Lookup table. */ | |
78104b9b | 937 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 938 | if (! table) |
939 | return 0; | |
940 | ||
941 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
942 | p.family = AF_INET6; | |
943 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
944 | IPV6_ADDR_COPY (&p.prefix, addr); | |
945 | ||
946 | rn = route_node_match (table, (struct prefix *) &p); | |
947 | ||
948 | while (rn) | |
949 | { | |
950 | route_unlock_node (rn); | |
951 | ||
952 | /* Pick up selected route. */ | |
9fd92e3c | 953 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
954 | { |
955 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
956 | continue; | |
957 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
958 | break; | |
959 | } | |
718e3744 | 960 | |
961 | /* If there is no selected route or matched route is EGP, go up | |
962 | tree. */ | |
6e26278c | 963 | if (! match) |
718e3744 | 964 | { |
965 | do { | |
966 | rn = rn->parent; | |
967 | } while (rn && rn->info == NULL); | |
968 | if (rn) | |
969 | route_lock_node (rn); | |
970 | } | |
971 | else | |
972 | { | |
973 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
974 | /* Directly point connected route. */ | |
975 | return match; | |
976 | else | |
977 | { | |
fa713d9e | 978 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 979 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
980 | return match; | |
981 | return NULL; | |
982 | } | |
983 | } | |
984 | } | |
985 | return NULL; | |
986 | } | |
718e3744 | 987 | |
7514fb77 PJ |
988 | #define RIB_SYSTEM_ROUTE(R) \ |
989 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
990 | ||
dc95824a DO |
991 | /* This function verifies reachability of one given nexthop, which can be |
992 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
993 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
994 | * nexthop->ifindex will be updated appropriately as well. | |
995 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
996 | * not vice versa. | |
997 | * | |
998 | * The return value is the final value of 'ACTIVE' flag. | |
999 | */ | |
1000 | ||
d02c56cd | 1001 | static unsigned |
718e3744 | 1002 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1003 | struct nexthop *nexthop, int set) | |
1004 | { | |
f3a1732e | 1005 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1006 | struct interface *ifp; |
7514fb77 | 1007 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1008 | int family; |
518f0eb1 | 1009 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1010 | |
7a4bb9c5 DS |
1011 | if (rn->p.family == AF_INET) |
1012 | family = AFI_IP; | |
1013 | else if (rn->p.family == AF_INET6) | |
1014 | family = AFI_IP6; | |
1015 | else | |
1016 | family = 0; | |
718e3744 | 1017 | switch (nexthop->type) |
1018 | { | |
1019 | case NEXTHOP_TYPE_IFINDEX: | |
78104b9b | 1020 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1021 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1022 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1023 | else | |
1024 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1025 | break; | |
718e3744 | 1026 | case NEXTHOP_TYPE_IPV4: |
1027 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1028 | family = AFI_IP; |
718e3744 | 1029 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1030 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1031 | else | |
1032 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1033 | break; | |
718e3744 | 1034 | case NEXTHOP_TYPE_IPV6: |
7514fb77 | 1035 | family = AFI_IP6; |
718e3744 | 1036 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1037 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1038 | else | |
1039 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1040 | break; | |
1041 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 1042 | /* RFC 5549, v4 prefix with v6 NH */ |
1043 | if (rn->p.family != AF_INET) | |
1044 | family = AFI_IP6; | |
718e3744 | 1045 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1046 | { | |
78104b9b | 1047 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1048 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1049 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1050 | else | |
1051 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1052 | } | |
1053 | else | |
1054 | { | |
1055 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1056 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1057 | else | |
1058 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1059 | } | |
1060 | break; | |
595db7f1 | 1061 | case NEXTHOP_TYPE_BLACKHOLE: |
1062 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1063 | break; | |
718e3744 | 1064 | default: |
1065 | break; | |
1066 | } | |
7514fb77 PJ |
1067 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1068 | return 0; | |
1069 | ||
f3a1732e CF |
1070 | /* XXX: What exactly do those checks do? Do we support |
1071 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1072 | if (RIB_SYSTEM_ROUTE(rib) || |
1073 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1074 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1075 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1076 | ||
f3a1732e CF |
1077 | /* The original code didn't determine the family correctly |
1078 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1079 | * from the rib_table_info in those cases. | |
1080 | * Possibly it may be better to use only the rib_table_info | |
1081 | * in every case. | |
1082 | */ | |
1083 | if (!family) | |
1084 | family = info->afi; | |
1085 | ||
c52ef59f | 1086 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1087 | |
ca84c8ef | 1088 | /* It'll get set if required inside */ |
0032dd59 FL |
1089 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->vrf_id, |
1090 | rib->tag); | |
7514fb77 | 1091 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1092 | { |
1093 | if (IS_ZEBRA_DEBUG_RIB) | |
1094 | { | |
1095 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
41ec9222 | 1096 | zlog_debug("%u:%s/%d: Filtering out with NH out %s due to route map", |
3ee39b5b DS |
1097 | rib->vrf_id, buf, rn->p.prefixlen, |
1098 | ifindex2ifname_vrf (nexthop->ifindex, rib->vrf_id)); | |
518f0eb1 DS |
1099 | } |
1100 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1101 | } | |
718e3744 | 1102 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1103 | } | |
1104 | ||
03e232a4 DO |
1105 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1106 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1107 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
1108 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
1109 | * transparently passed to nexthop_active_check(). | |
1110 | * | |
1111 | * Return value is the new number of active nexthops. | |
1112 | */ | |
1113 | ||
a1ac18c4 | 1114 | static int |
718e3744 | 1115 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1116 | { | |
1117 | struct nexthop *nexthop; | |
c52ef59f | 1118 | union g_addr prev_src; |
6e26278c DS |
1119 | unsigned int prev_active, prev_index, new_active, old_num_nh; |
1120 | ||
1121 | old_num_nh = rib->nexthop_active_num; | |
718e3744 | 1122 | |
1123 | rib->nexthop_active_num = 0; | |
1124 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1125 | ||
1126 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1127 | { |
c52ef59f DS |
1128 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1129 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1130 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1131 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1132 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1133 | rib->nexthop_active_num++; | |
c52ef59f | 1134 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1135 | if (prev_active != new_active || |
c52ef59f DS |
1136 | prev_index != nexthop->ifindex || |
1137 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1138 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1139 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1140 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1141 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1142 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c DS |
1143 | { |
1144 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1145 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1146 | } | |
03e232a4 | 1147 | } |
6e26278c DS |
1148 | |
1149 | if (old_num_nh != rib->nexthop_active_num) | |
1150 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1151 | ||
1152 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_CHANGED)) | |
1153 | { | |
1154 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1155 | } | |
1156 | ||
718e3744 | 1157 | return rib->nexthop_active_num; |
1158 | } | |
6baeb988 | 1159 | |
6b0655a2 | 1160 | |
718e3744 | 1161 | |
6ae24471 DS |
1162 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1163 | * is only used for IPv4. | |
1164 | */ | |
3e5c6e00 | 1165 | static int |
6ae24471 | 1166 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1167 | { |
1168 | int ret = 0; | |
fa713d9e | 1169 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1170 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1171 | int recursing; |
718e3744 | 1172 | |
416ec78d DL |
1173 | if (info->safi != SAFI_UNICAST) |
1174 | { | |
1175 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1176 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1177 | return ret; | |
1178 | } | |
1179 | ||
5adc2528 AS |
1180 | /* |
1181 | * Make sure we update the FPM any time we send new information to | |
1182 | * the kernel. | |
1183 | */ | |
1184 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1185 | switch (PREFIX_FAMILY (&rn->p)) |
1186 | { | |
1187 | case AF_INET: | |
6ae24471 DS |
1188 | if (update) |
1189 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1190 | else | |
1191 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1192 | break; |
718e3744 | 1193 | case AF_INET6: |
dccc5225 | 1194 | if (update) |
1195 | ret = kernel_update_ipv6 (&rn->p, rib); | |
1196 | else | |
1197 | ret = kernel_add_ipv6 (&rn->p, rib); | |
718e3744 | 1198 | break; |
718e3744 | 1199 | } |
1200 | ||
3e5c6e00 | 1201 | /* If install succeeds, update FIB flag for nexthops. */ |
1202 | if (!ret) | |
718e3744 | 1203 | { |
fa713d9e | 1204 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1205 | { |
1206 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1207 | continue; | |
1208 | ||
1209 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1210 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1211 | else | |
1212 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1213 | } | |
718e3744 | 1214 | } |
3e5c6e00 | 1215 | |
1216 | return ret; | |
718e3744 | 1217 | } |
1218 | ||
1219 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1220 | static int |
718e3744 | 1221 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1222 | { | |
1223 | int ret = 0; | |
fa713d9e | 1224 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1225 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1226 | int recursing; |
718e3744 | 1227 | |
416ec78d DL |
1228 | if (info->safi != SAFI_UNICAST) |
1229 | { | |
1230 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1231 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1232 | return ret; | |
1233 | } | |
1234 | ||
5adc2528 AS |
1235 | /* |
1236 | * Make sure we update the FPM any time we send new information to | |
1237 | * the kernel. | |
1238 | */ | |
1239 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1240 | ||
718e3744 | 1241 | switch (PREFIX_FAMILY (&rn->p)) |
1242 | { | |
1243 | case AF_INET: | |
1244 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1245 | break; | |
718e3744 | 1246 | case AF_INET6: |
1247 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1248 | break; | |
718e3744 | 1249 | } |
1250 | ||
fa713d9e | 1251 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1252 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1253 | ||
1254 | return ret; | |
1255 | } | |
1256 | ||
1257 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1258 | static void |
718e3744 | 1259 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1260 | { | |
416ec78d DL |
1261 | rib_table_info_t *info = rn->table->info; |
1262 | ||
718e3744 | 1263 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
1264 | { | |
416ec78d DL |
1265 | if (info->safi == SAFI_UNICAST) |
1266 | zfpm_trigger_update (rn, "rib_uninstall"); | |
5adc2528 | 1267 | |
718e3744 | 1268 | redistribute_delete (&rn->p, rib); |
1269 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1270 | rib_uninstall_kernel (rn, rib); | |
1271 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1272 | } | |
1273 | } | |
1274 | ||
6d691129 PJ |
1275 | static void rib_unlink (struct route_node *, struct rib *); |
1276 | ||
9fd92e3c AS |
1277 | /* |
1278 | * rib_can_delete_dest | |
1279 | * | |
1280 | * Returns TRUE if the given dest can be deleted from the table. | |
1281 | */ | |
1282 | static int | |
1283 | rib_can_delete_dest (rib_dest_t *dest) | |
1284 | { | |
1285 | if (dest->routes) | |
1286 | { | |
1287 | return 0; | |
1288 | } | |
1289 | ||
5adc2528 AS |
1290 | /* |
1291 | * Don't delete the dest if we have to update the FPM about this | |
1292 | * prefix. | |
1293 | */ | |
1294 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1295 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1296 | return 0; | |
1297 | ||
9fd92e3c AS |
1298 | return 1; |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * rib_gc_dest | |
1303 | * | |
1304 | * Garbage collect the rib dest corresponding to the given route node | |
1305 | * if appropriate. | |
1306 | * | |
1307 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1308 | */ | |
1309 | int | |
1310 | rib_gc_dest (struct route_node *rn) | |
1311 | { | |
1312 | rib_dest_t *dest; | |
41ec9222 | 1313 | struct zebra_vrf *zvrf; |
9fd92e3c AS |
1314 | |
1315 | dest = rib_dest_from_rnode (rn); | |
1316 | if (!dest) | |
1317 | return 0; | |
1318 | ||
1319 | if (!rib_can_delete_dest (dest)) | |
1320 | return 0; | |
1321 | ||
41ec9222 | 1322 | zvrf = rib_dest_vrf (dest); |
2263a412 DL |
1323 | if (IS_ZEBRA_DEBUG_RIB) |
1324 | rnode_debug (rn, zvrf->vrf_id, "removing dest from table"); | |
9fd92e3c AS |
1325 | |
1326 | dest->rnode = NULL; | |
1327 | XFREE (MTYPE_RIB_DEST, dest); | |
1328 | rn->info = NULL; | |
1329 | ||
1330 | /* | |
1331 | * Release the one reference that we keep on the route node. | |
1332 | */ | |
1333 | route_unlock_node (rn); | |
1334 | return 1; | |
1335 | } | |
1336 | ||
3e5c6e00 | 1337 | static void |
1338 | rib_process_add_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1339 | struct rib *select) | |
1340 | { | |
1341 | char buf[INET6_ADDRSTRLEN]; | |
1342 | int installed = 1; | |
1343 | ||
1344 | zfpm_trigger_update (rn, "new route selected"); | |
1345 | ||
1346 | /* Update real nexthop. This may actually determine if nexthop is active or not. */ | |
1347 | if (!nexthop_active_update (rn, select, 1)) | |
1348 | { | |
1349 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); | |
1350 | return; | |
1351 | } | |
1352 | ||
1353 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1354 | if (IS_ZEBRA_DEBUG_RIB) | |
1355 | { | |
1356 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1357 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1358 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1359 | } | |
1360 | ||
1361 | if (!RIB_SYSTEM_ROUTE (select)) | |
1362 | { | |
1363 | if (rib_install_kernel (rn, select, 0)) | |
1364 | { | |
1365 | installed = 0; | |
fb02523b DS |
1366 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1367 | zlog_warn ("%u:%s/%d: Route install failed", | |
1368 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1369 | } |
1370 | } | |
1371 | ||
1372 | /* Update for redistribution. */ | |
1373 | if (installed) | |
1374 | redistribute_update (&rn->p, select, NULL); | |
1375 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); | |
1376 | } | |
1377 | ||
1378 | static void | |
1379 | rib_process_del_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1380 | struct rib *fib) | |
1381 | { | |
1382 | char buf[INET6_ADDRSTRLEN]; | |
1383 | ||
1384 | zfpm_trigger_update (rn, "removing existing route"); | |
1385 | ||
1386 | /* Withdraw redistribute and uninstall from kernel. */ | |
1387 | if (IS_ZEBRA_DEBUG_RIB) | |
1388 | { | |
1389 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1390 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1391 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1392 | } | |
1393 | ||
1394 | redistribute_delete(&rn->p, fib); | |
1395 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1396 | rib_uninstall_kernel (rn, fib); | |
1397 | ||
1398 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1399 | ||
1400 | /* Update nexthop for route, reset changed flag. */ | |
1401 | nexthop_active_update (rn, fib, 1); | |
1402 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); | |
1403 | } | |
1404 | ||
1405 | static void | |
1406 | rib_process_update_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1407 | struct rib *select, struct rib *fib) | |
1408 | { | |
1409 | char buf[INET6_ADDRSTRLEN]; | |
1410 | struct nexthop *nexthop = NULL, *tnexthop; | |
1411 | int recursing; | |
1412 | int nh_active = 0; | |
1413 | int installed = 1; | |
1414 | ||
1415 | if (IS_ZEBRA_DEBUG_RIB) | |
1416 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1417 | ||
1418 | /* | |
1419 | * We have to install or update if a new route has been selected or | |
1420 | * something has changed. | |
1421 | */ | |
1422 | if (select != fib || | |
1423 | CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) | |
1424 | { | |
1425 | zfpm_trigger_update (rn, "updating existing route"); | |
1426 | ||
1427 | /* Update the nexthop; we could determine here that nexthop is inactive. */ | |
1428 | if (nexthop_active_update (rn, select, 1)) | |
1429 | nh_active = 1; | |
1430 | ||
1431 | /* If nexthop is active, install the selected route, if appropriate. If | |
1432 | * the install succeeds, cleanup flags for prior route, if different from | |
1433 | * newly selected. | |
1434 | */ | |
1435 | if (nh_active) | |
1436 | { | |
1437 | if (IS_ZEBRA_DEBUG_RIB) | |
1438 | { | |
1439 | if (select != fib) | |
1440 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1441 | "old %p (type %d)", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1442 | rn, select, select->type, fib, fib->type); | |
1443 | else | |
1444 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1445 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1446 | } | |
1447 | /* Non-system route should be installed. */ | |
1448 | if (!RIB_SYSTEM_ROUTE (select)) | |
1449 | { | |
1450 | if (rib_install_kernel (rn, select, 1)) | |
1451 | { | |
1452 | installed = 0; | |
fb02523b DS |
1453 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1454 | zlog_warn ("%u:%s/%d: Route install failed", | |
1455 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1456 | } |
1457 | } | |
1458 | ||
1459 | /* If install succeeded or system route, cleanup flags for prior route. */ | |
1460 | if (installed && select != fib) | |
1461 | { | |
1462 | if (RIB_SYSTEM_ROUTE(select)) | |
1463 | { | |
1464 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1465 | rib_uninstall_kernel (rn, fib); | |
1466 | } | |
1467 | else | |
1468 | { | |
1469 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1470 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1471 | } | |
1472 | ||
1473 | } | |
1474 | ||
1475 | /* Update for redistribution. */ | |
1476 | if (installed) | |
1477 | { | |
1478 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1479 | redistribute_update (&rn->p, select, (select == fib) ? NULL : fib); | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | /* | |
1484 | * If nexthop for selected route is not active or install failed, we | |
1485 | * may need to uninstall and delete for redistribution. | |
1486 | */ | |
1487 | if (!nh_active || !installed) | |
1488 | { | |
1489 | struct rib *del; | |
1490 | ||
1491 | if (IS_ZEBRA_DEBUG_RIB) | |
1492 | { | |
1493 | if (select != fib) | |
1494 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1495 | "old %p (type %d) - %s", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1496 | rn, select, select->type, fib, fib->type, | |
1497 | nh_active ? "install failed" : "nexthop inactive"); | |
1498 | else | |
1499 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) - %s", | |
1500 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type, | |
1501 | nh_active ? "install failed" : "nexthop inactive"); | |
1502 | } | |
1503 | ||
1504 | del = (select == fib) ? select : fib; | |
1505 | ||
1506 | redistribute_delete(&rn->p, del); | |
1507 | ||
1508 | if (!RIB_SYSTEM_ROUTE (del)) | |
1509 | rib_uninstall_kernel (rn, del); | |
1510 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1511 | } | |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | /* | |
1516 | * Same route selected; check if in the FIB and if not, re-install. This | |
1517 | * is housekeeping code to deal with race conditions in kernel with linux | |
1518 | * netlink reporting interface up before IPv4 or IPv6 protocol is ready | |
1519 | * to add routes. | |
1520 | */ | |
1521 | if (!RIB_SYSTEM_ROUTE (select)) | |
1522 | { | |
1523 | int in_fib = 0; | |
1524 | ||
1525 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) | |
1526 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1527 | { | |
1528 | in_fib = 1; | |
1529 | break; | |
1530 | } | |
1531 | if (!in_fib) | |
1532 | rib_install_kernel (rn, select, 0); | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | /* Update prior route. */ | |
1537 | if (select != fib) | |
1538 | { | |
1539 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1540 | ||
1541 | /* Set real nexthop. */ | |
1542 | nexthop_active_update (rn, fib, 1); | |
1543 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); | |
1544 | } | |
1545 | ||
1546 | /* Clear changed flag. */ | |
1547 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); | |
1548 | } | |
1549 | ||
718e3744 | 1550 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1551 | static void |
1552 | rib_process (struct route_node *rn) | |
718e3744 | 1553 | { |
1554 | struct rib *rib; | |
1555 | struct rib *next; | |
1556 | struct rib *fib = NULL; | |
1557 | struct rib *select = NULL; | |
6d691129 | 1558 | struct rib *del = NULL; |
f304cb48 | 1559 | char buf[INET6_ADDRSTRLEN]; |
41ec9222 | 1560 | rib_dest_t *dest; |
1561 | struct zebra_vrf *zvrf = NULL; | |
58255d34 | 1562 | vrf_id_t vrf_id = VRF_UNKNOWN; |
41ec9222 | 1563 | |
4d38fdb4 | 1564 | assert (rn); |
1565 | ||
41ec9222 | 1566 | dest = rib_dest_from_rnode (rn); |
1567 | if (dest) | |
1568 | { | |
1569 | zvrf = rib_dest_vrf (dest); | |
1570 | vrf_id = zvrf->vrf_id; | |
1571 | } | |
1572 | ||
1573 | if (IS_ZEBRA_DEBUG_RIB) | |
f304cb48 | 1574 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1575 | |
41ec9222 | 1576 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1577 | zlog_debug ("%u:%s/%d: Processing rn %p", vrf_id, buf, rn->p.prefixlen, rn); | |
1578 | ||
9fd92e3c | 1579 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1580 | { |
41ec9222 | 1581 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1582 | zlog_debug ("%u:%s/%d: Examine rib %p (type %d) status %x flags %x " | |
1583 | "dist %d metric %d", | |
1584 | vrf_id, buf, rn->p.prefixlen, rib, rib->type, rib->status, | |
1585 | rib->flags, rib->distance, rib->metric); | |
1586 | ||
6e26278c DS |
1587 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1588 | ||
718e3744 | 1589 | /* Currently installed rib. */ |
1590 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1591 | { |
1592 | assert (fib == NULL); | |
1593 | fib = rib; | |
1594 | } | |
ca657c65 | 1595 | |
6d691129 PJ |
1596 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1597 | * which we need to do do further work with below. | |
1598 | */ | |
1599 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1600 | { | |
1601 | if (rib != fib) | |
1602 | { | |
1603 | if (IS_ZEBRA_DEBUG_RIB) | |
2263a412 | 1604 | rnode_debug (rn, vrf_id, "rn %p, removing rib %p", rn, rib); |
9fd92e3c | 1605 | rib_unlink (rn, rib); |
6d691129 PJ |
1606 | } |
1607 | else | |
1608 | del = rib; | |
1609 | ||
1610 | continue; | |
1611 | } | |
4d38fdb4 | 1612 | |
718e3744 | 1613 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1614 | /* This first call to nexthop_active_update is merely to determine if |
1615 | * there's any change to nexthops associated with this RIB entry. Now, | |
1616 | * rib_process() can be invoked due to an external event such as link | |
1617 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1618 | * a decision has already been made that the NHs have changed. So, no | |
1619 | * need to invoke a potentially expensive call again. Further, since | |
1620 | * the change might be in a recursive NH which is not caught in | |
1621 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1622 | * recursive NHs. | |
6e26278c | 1623 | */ |
ca657c65 | 1624 | if (!CHECK_FLAG(rib->flags, ZEBRA_FLAG_CHANGED) && |
f857321e DW |
1625 | ! nexthop_active_update (rn, rib, 0)) |
1626 | { | |
1627 | if (rib->type == ZEBRA_ROUTE_TABLE) | |
1628 | { | |
1629 | /* This entry was denied by the 'ip protocol table' route-map, we | |
1630 | * need to delete it */ | |
1631 | if (rib != fib) | |
1632 | { | |
1633 | if (IS_ZEBRA_DEBUG_RIB) | |
1634 | zlog_debug ("%s: %s/%d: imported via import-table but denied " | |
1635 | "by the ip protocol table route-map", | |
1636 | __func__, buf, rn->p.prefixlen); | |
1637 | rib_unlink (rn, rib); | |
1638 | } | |
1639 | else | |
1640 | del = rib; | |
1641 | } | |
1642 | ||
1643 | continue; | |
1644 | } | |
718e3744 | 1645 | |
f857321e | 1646 | /* Infinite distance. */ |
718e3744 | 1647 | if (rib->distance == DISTANCE_INFINITY) |
8733ba72 DS |
1648 | { |
1649 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1650 | continue; | |
1651 | } | |
718e3744 | 1652 | |
af887b51 | 1653 | /* Newly selected rib, the common case. */ |
1654 | if (!select) | |
1655 | { | |
1656 | select = rib; | |
1657 | continue; | |
1658 | } | |
1659 | ||
1660 | /* filter route selection in following order: | |
af887b51 | 1661 | * - connected beats other types |
a8d9c1f9 | 1662 | * - lower distance beats higher |
af887b51 | 1663 | * - lower metric beats higher for equal distance |
1664 | * - last, hence oldest, route wins tie break. | |
1665 | */ | |
a1038a15 | 1666 | |
1667 | /* Connected routes. Pick the last connected | |
1668 | * route of the set of lowest metric connected routes. | |
1669 | */ | |
a8d9c1f9 | 1670 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1671 | { | |
a1038a15 | 1672 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1673 | || rib->metric <= select->metric) |
8733ba72 DS |
1674 | { |
1675 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1676 | select = rib; | |
1677 | } | |
1678 | else | |
1679 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
a1038a15 | 1680 | continue; |
a8d9c1f9 | 1681 | } |
1682 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
8733ba72 DS |
1683 | { |
1684 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1685 | continue; | |
1686 | } | |
a8d9c1f9 | 1687 | |
1688 | /* higher distance loses */ | |
1689 | if (rib->distance > select->distance) | |
8733ba72 DS |
1690 | { |
1691 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1692 | continue; | |
1693 | } | |
a8d9c1f9 | 1694 | |
1695 | /* lower wins */ | |
1696 | if (rib->distance < select->distance) | |
1697 | { | |
8733ba72 | 1698 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
af887b51 | 1699 | select = rib; |
a8d9c1f9 | 1700 | continue; |
1701 | } | |
1702 | ||
1703 | /* metric tie-breaks equal distance */ | |
1704 | if (rib->metric <= select->metric) | |
8733ba72 DS |
1705 | { |
1706 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1707 | select = rib; | |
1708 | } | |
9fd92e3c | 1709 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1710 | |
1711 | /* After the cycle is finished, the following pointers will be set: | |
1712 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1713 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1714 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1715 | * rib --- NULL | |
1716 | */ | |
41ec9222 | 1717 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1718 | zlog_debug ("%u:%s/%d: After processing: select %p fib %p del %p", | |
1719 | vrf_id, buf, rn->p.prefixlen, select, fib, del); | |
dc95824a DO |
1720 | |
1721 | /* Same RIB entry is selected. Update FIB and finish. */ | |
3e5c6e00 | 1722 | if (select && select == fib) |
1723 | rib_process_update_route (zvrf, rn, select, select); | |
1724 | else if (select && fib) | |
1725 | rib_process_update_route (zvrf, rn, select, fib); | |
1726 | else if (select) | |
1727 | rib_process_add_route (zvrf, rn, select); | |
1728 | else if (fib) | |
1729 | rib_process_del_route (zvrf, rn, fib); | |
1730 | ||
1731 | #if 0 | |
718e3744 | 1732 | if (select && select == fib) |
1733 | { | |
2263a412 DL |
1734 | if (IS_ZEBRA_DEBUG_RIB) |
1735 | rnode_debug (rn, vrf_id, "Updating existing route, select %p, fib %p", | |
1736 | select, fib); | |
718e3744 | 1737 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1738 | { |
416ec78d DL |
1739 | if (info->safi == SAFI_UNICAST) |
1740 | zfpm_trigger_update (rn, "updating existing route"); | |
5adc2528 | 1741 | |
4d38fdb4 | 1742 | /* Set real nexthop. */ |
6e26278c DS |
1743 | /* Need to check if any NHs are active to clear the |
1744 | * the selected flag | |
1745 | */ | |
1746 | if (nexthop_active_update (rn, select, 1)) | |
1747 | { | |
41ec9222 | 1748 | if (IS_ZEBRA_DEBUG_RIB) |
1749 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1750 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
dccc5225 | 1751 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1752 | { |
dccc5225 | 1753 | /* Clear FIB flag if performing a replace, will get set again |
1754 | * as part of install. | |
1755 | */ | |
6ae24471 DS |
1756 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) |
1757 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
dccc5225 | 1758 | rib_install_kernel (rn, select, 1); |
6ae24471 | 1759 | } |
5048fe14 | 1760 | |
1761 | /* assuming that the receiver knows how to dedup */ | |
c41fc67b | 1762 | redistribute_update (&rn->p, select, NULL); |
6e26278c DS |
1763 | } |
1764 | else | |
1765 | { | |
41ec9222 | 1766 | if (IS_ZEBRA_DEBUG_RIB) |
1767 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1768 | "- nexthop inactive", | |
1769 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1770 | ||
5048fe14 | 1771 | /* Withdraw unreachable redistribute route */ |
1772 | redistribute_delete(&rn->p, select); | |
1773 | ||
dccc5225 | 1774 | /* Do the uninstall here, if not done earlier. */ |
1775 | if (! RIB_SYSTEM_ROUTE (select)) | |
6ae24471 | 1776 | rib_uninstall_kernel (rn, select); |
6e26278c DS |
1777 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1778 | } | |
ca657c65 | 1779 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
6e26278c | 1780 | } |
d753e9ee | 1781 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1782 | { |
1783 | /* Housekeeping code to deal with | |
1784 | race conditions in kernel with linux | |
1785 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1786 | is ready to add routes. | |
1787 | This makes sure the routes are IN the kernel. | |
1788 | */ | |
1789 | ||
fa713d9e | 1790 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1791 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1792 | { |
a3aaf5b0 DO |
1793 | installed = 1; |
1794 | break; | |
4d38fdb4 | 1795 | } |
1796 | if (! installed) | |
6ae24471 | 1797 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1798 | } |
6d691129 | 1799 | goto end; |
718e3744 | 1800 | } |
1801 | ||
dc95824a DO |
1802 | /* At this point we either haven't found the best RIB entry or it is |
1803 | * different from what we currently intend to flag with SELECTED. In both | |
1804 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1805 | */ | |
718e3744 | 1806 | if (fib) |
1807 | { | |
2263a412 DL |
1808 | if (IS_ZEBRA_DEBUG_RIB) |
1809 | rnode_debug (rn, vrf_id, "Removing existing route, fib %p", fib); | |
1810 | ||
416ec78d DL |
1811 | if (info->safi == SAFI_UNICAST) |
1812 | zfpm_trigger_update (rn, "removing existing route"); | |
5adc2528 | 1813 | |
dccc5225 | 1814 | /* If there's no route to replace this with, withdraw redistribute and |
1815 | * uninstall from kernel. | |
1816 | */ | |
5048fe14 | 1817 | if (!select) |
6ae24471 | 1818 | { |
41ec9222 | 1819 | if (IS_ZEBRA_DEBUG_RIB) |
1820 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1821 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1822 | ||
dccc5225 | 1823 | redistribute_delete(&rn->p, fib); |
1824 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1825 | rib_uninstall_kernel (rn, fib); | |
6ae24471 | 1826 | } |
dccc5225 | 1827 | |
718e3744 | 1828 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1829 | ||
1830 | /* Set real nexthop. */ | |
1831 | nexthop_active_update (rn, fib, 1); | |
ca657c65 | 1832 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1833 | } |
1834 | ||
dc95824a DO |
1835 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1836 | * tell, that if a new winner exists, FIB is still not updated with this | |
1837 | * data, but ready to be. | |
1838 | */ | |
718e3744 | 1839 | if (select) |
1840 | { | |
2263a412 DL |
1841 | if (IS_ZEBRA_DEBUG_RIB) |
1842 | rnode_debug (rn, "Adding route, select %p", select); | |
1843 | ||
416ec78d DL |
1844 | if (info->safi == SAFI_UNICAST) |
1845 | zfpm_trigger_update (rn, "new route selected"); | |
5adc2528 | 1846 | |
718e3744 | 1847 | /* Set real nexthop. */ |
6e26278c DS |
1848 | if (nexthop_active_update (rn, select, 1)) |
1849 | { | |
41ec9222 | 1850 | if (IS_ZEBRA_DEBUG_RIB) |
1851 | { | |
1852 | if (fib) | |
1853 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1854 | "old %p (type %d)", vrf_id, buf, rn->p.prefixlen, rn, | |
1855 | select, select->type, fib, fib->type); | |
1856 | else | |
1857 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1858 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1859 | } | |
1860 | ||
dccc5225 | 1861 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1862 | { |
dccc5225 | 1863 | /* Clear FIB flag if performing a replace, will get set again |
1864 | * as part of install. | |
1865 | */ | |
1866 | if (fib) | |
1867 | { | |
1868 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1869 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1870 | } | |
1871 | rib_install_kernel (rn, select, fib? 1 : 0); | |
6ae24471 | 1872 | } |
0b560feb | 1873 | else |
1874 | { | |
1875 | /* Uninstall prior route here, if needed. */ | |
1876 | if (fib && !RIB_SYSTEM_ROUTE (fib)) | |
1877 | rib_uninstall_kernel (rn, fib); | |
1878 | } | |
dccc5225 | 1879 | |
6e26278c | 1880 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
5048fe14 | 1881 | /* Unconditionally announce, this part is exercised by new routes */ |
c41fc67b | 1882 | /* If we cannot add, for example route added is learnt by the */ |
1883 | /* protocol we're trying to redistribute to, delete the redist */ | |
1884 | /* This is notified by setting the is_update to 1 */ | |
1885 | redistribute_update (&rn->p, select, fib); | |
6e26278c | 1886 | } |
6ae24471 DS |
1887 | else |
1888 | { | |
41ec9222 | 1889 | /* Uninstall prior route here and do redist delete, if needed. */ |
a219b295 | 1890 | if (fib) |
41ec9222 | 1891 | { |
1892 | if (IS_ZEBRA_DEBUG_RIB) | |
1893 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1894 | "- nexthop inactive", | |
1895 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1896 | ||
1897 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1898 | rib_uninstall_kernel (rn, fib); | |
1899 | redistribute_delete(&rn->p, fib); | |
1900 | } | |
6ae24471 | 1901 | } |
ca657c65 | 1902 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1903 | } |
3e5c6e00 | 1904 | #endif |
4d38fdb4 | 1905 | |
6d691129 PJ |
1906 | /* FIB route was removed, should be deleted */ |
1907 | if (del) | |
1908 | { | |
1909 | if (IS_ZEBRA_DEBUG_RIB) | |
2263a412 | 1910 | rnode_debug (rn, vrf_id, "Deleting fib %p, rn %p", del, rn); |
6d691129 PJ |
1911 | rib_unlink (rn, del); |
1912 | } | |
4d38fdb4 | 1913 | |
9fd92e3c AS |
1914 | /* |
1915 | * Check if the dest can be deleted now. | |
1916 | */ | |
1917 | rib_gc_dest (rn); | |
e96f9203 DO |
1918 | } |
1919 | ||
5110a0c6 SH |
1920 | /* Take a list of route_node structs and return 1, if there was a record |
1921 | * picked from it and processed by rib_process(). Don't process more, | |
1922 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1923 | */ |
ef9b113e | 1924 | static unsigned int |
e96f9203 DO |
1925 | process_subq (struct list * subq, u_char qindex) |
1926 | { | |
5110a0c6 | 1927 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1928 | struct route_node *rnode; |
41ec9222 | 1929 | char buf[INET6_ADDRSTRLEN]; |
1930 | rib_dest_t *dest; | |
1931 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 SH |
1932 | |
1933 | if (!lnode) | |
e96f9203 | 1934 | return 0; |
5110a0c6 | 1935 | |
e96f9203 | 1936 | rnode = listgetdata (lnode); |
41ec9222 | 1937 | dest = rib_dest_from_rnode (rnode); |
1938 | if (dest) | |
1939 | zvrf = rib_dest_vrf (dest); | |
1940 | ||
e96f9203 | 1941 | rib_process (rnode); |
5110a0c6 | 1942 | |
41ec9222 | 1943 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1944 | { | |
1945 | inet_ntop (rnode->p.family, &rnode->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1946 | zlog_debug ("%u:%s/%d: rn %p dequeued from sub-queue %u", | |
1947 | zvrf ? zvrf->vrf_id : 0, buf, rnode->p.prefixlen, rnode, qindex); | |
1948 | } | |
1949 | ||
9fd92e3c AS |
1950 | if (rnode->info) |
1951 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1952 | ||
67b9467f | 1953 | #if 0 |
5110a0c6 SH |
1954 | else |
1955 | { | |
1956 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1957 | __func__, rnode, rnode->lock); | |
1958 | zlog_backtrace(LOG_DEBUG); | |
1959 | } | |
67b9467f | 1960 | #endif |
e96f9203 DO |
1961 | route_unlock_node (rnode); |
1962 | list_delete_node (subq, lnode); | |
1963 | return 1; | |
1964 | } | |
1965 | ||
fb018d25 DS |
1966 | /* |
1967 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1968 | */ | |
1969 | static void | |
1970 | meta_queue_process_complete (struct work_queue *dummy) | |
1971 | { | |
9ec6b0bb | 1972 | vrf_iter_t iter; |
1973 | struct zebra_vrf *zvrf; | |
1974 | ||
1975 | /* Evaluate nexthops for those VRFs which underwent route processing. This | |
1976 | * should limit the evaluation to the necessary VRFs in most common | |
1977 | * situations. | |
1978 | */ | |
1979 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
1980 | { | |
1981 | if (((zvrf = vrf_iter2info (iter)) != NULL) && | |
1982 | (zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
1983 | { | |
1984 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
1985 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); | |
1986 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
1987 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); | |
1988 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
1989 | } | |
1990 | } | |
fb018d25 DS |
1991 | } |
1992 | ||
e96f9203 DO |
1993 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1994 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1995 | * is pointed to the meta queue structure. | |
1996 | */ | |
1997 | static wq_item_status | |
1998 | meta_queue_process (struct work_queue *dummy, void *data) | |
1999 | { | |
2000 | struct meta_queue * mq = data; | |
5110a0c6 SH |
2001 | unsigned i; |
2002 | ||
e96f9203 DO |
2003 | for (i = 0; i < MQ_SIZE; i++) |
2004 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
2005 | { |
2006 | mq->size--; | |
2007 | break; | |
2008 | } | |
e96f9203 DO |
2009 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
2010 | } | |
2011 | ||
9fd92e3c AS |
2012 | /* |
2013 | * Map from rib types to queue type (priority) in meta queue | |
2014 | */ | |
5110a0c6 SH |
2015 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
2016 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
2017 | [ZEBRA_ROUTE_KERNEL] = 0, | |
2018 | [ZEBRA_ROUTE_CONNECT] = 0, | |
2019 | [ZEBRA_ROUTE_STATIC] = 1, | |
2020 | [ZEBRA_ROUTE_RIP] = 2, | |
2021 | [ZEBRA_ROUTE_RIPNG] = 2, | |
2022 | [ZEBRA_ROUTE_OSPF] = 2, | |
2023 | [ZEBRA_ROUTE_OSPF6] = 2, | |
2024 | [ZEBRA_ROUTE_ISIS] = 2, | |
2025 | [ZEBRA_ROUTE_BGP] = 3, | |
2026 | [ZEBRA_ROUTE_HSLS] = 4, | |
7a4bb9c5 | 2027 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
2028 | }; |
2029 | ||
2030 | /* Look into the RN and queue it into one or more priority queues, | |
2031 | * increasing the size for each data push done. | |
e96f9203 | 2032 | */ |
ef9b113e SH |
2033 | static void |
2034 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 2035 | { |
e96f9203 | 2036 | struct rib *rib; |
5110a0c6 | 2037 | |
9fd92e3c | 2038 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 2039 | { |
5110a0c6 | 2040 | u_char qindex = meta_queue_map[rib->type]; |
9ec6b0bb | 2041 | struct zebra_vrf *zvrf; |
5110a0c6 SH |
2042 | |
2043 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
2044 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
2045 | RIB_ROUTE_QUEUED (qindex))) | |
2263a412 DL |
2046 | { |
2047 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2048 | rnode_debug (rn, rib->vrf_id, "rn %p is already queued in sub-queue %u", | |
2049 | rn, qindex); | |
2050 | continue; | |
2051 | } | |
5110a0c6 | 2052 | |
9fd92e3c | 2053 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
2054 | listnode_add (mq->subq[qindex], rn); |
2055 | route_lock_node (rn); | |
2056 | mq->size++; | |
2057 | ||
41ec9222 | 2058 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 DL |
2059 | rnode_debug (rn, rib->vrf_id, "queued rn %p into sub-queue %u", |
2060 | rn, qindex); | |
9ec6b0bb | 2061 | |
2062 | zvrf = zebra_vrf_lookup (rib->vrf_id); | |
2063 | if (zvrf) | |
2064 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
e96f9203 | 2065 | } |
4d38fdb4 | 2066 | } |
2067 | ||
6d691129 | 2068 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 2069 | void |
44e9909d | 2070 | rib_queue_add (struct route_node *rn) |
4d38fdb4 | 2071 | { |
44e9909d | 2072 | assert (rn); |
4d38fdb4 | 2073 | |
fc328ac9 | 2074 | /* Pointless to queue a route_node with no RIB entries to add or remove */ |
9fd92e3c | 2075 | if (!rnode_to_ribs (rn)) |
6d691129 | 2076 | { |
fc328ac9 SV |
2077 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
2078 | __func__, rn, rn->lock); | |
2079 | zlog_backtrace(LOG_DEBUG); | |
2080 | return; | |
2081 | } | |
2082 | ||
44e9909d | 2083 | if (zebrad.ribq == NULL) |
fc328ac9 SV |
2084 | { |
2085 | zlog_err ("%s: work_queue does not exist!", __func__); | |
2086 | return; | |
4d38fdb4 | 2087 | } |
4d38fdb4 | 2088 | |
cc2dd928 SH |
2089 | /* |
2090 | * The RIB queue should normally be either empty or holding the only | |
2091 | * work_queue_item element. In the latter case this element would | |
2092 | * hold a pointer to the meta queue structure, which must be used to | |
2093 | * actually queue the route nodes to process. So create the MQ | |
2094 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
2095 | * This semantics was introduced after 0.99.9 release. |
2096 | */ | |
44e9909d DS |
2097 | if (!zebrad.ribq->items->count) |
2098 | work_queue_add (zebrad.ribq, zebrad.mq); | |
e96f9203 | 2099 | |
44e9909d | 2100 | rib_meta_queue_add (zebrad.mq, rn); |
fc328ac9 | 2101 | |
fc328ac9 | 2102 | return; |
4d38fdb4 | 2103 | } |
2104 | ||
5110a0c6 SH |
2105 | /* Create new meta queue. |
2106 | A destructor function doesn't seem to be necessary here. | |
2107 | */ | |
ef9b113e SH |
2108 | static struct meta_queue * |
2109 | meta_queue_new (void) | |
e96f9203 DO |
2110 | { |
2111 | struct meta_queue *new; | |
5110a0c6 SH |
2112 | unsigned i; |
2113 | ||
2114 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
2115 | assert(new); | |
e96f9203 | 2116 | |
e96f9203 | 2117 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
2118 | { |
2119 | new->subq[i] = list_new (); | |
2120 | assert(new->subq[i]); | |
2121 | } | |
2122 | ||
e96f9203 DO |
2123 | return new; |
2124 | } | |
2125 | ||
4d38fdb4 | 2126 | /* initialise zebra rib work queue */ |
a1ac18c4 | 2127 | static void |
4d38fdb4 | 2128 | rib_queue_init (struct zebra_t *zebra) |
2129 | { | |
fc328ac9 SV |
2130 | assert (zebra); |
2131 | ||
4d38fdb4 | 2132 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 2133 | "route_node processing"))) |
4d38fdb4 | 2134 | { |
6d691129 | 2135 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 2136 | return; |
2137 | } | |
2138 | ||
2139 | /* fill in the work queue spec */ | |
e96f9203 | 2140 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2141 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2142 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2143 | /* XXX: TODO: These should be runtime configurable via vty */ |
2144 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2145 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2146 | |
e96f9203 | 2147 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2148 | { |
e96f9203 | 2149 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2150 | return; |
2151 | } | |
2152 | return; | |
718e3744 | 2153 | } |
2154 | ||
6d691129 PJ |
2155 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2156 | * | |
2157 | * The queue length is bounded by the maximal size of the routing table, | |
2158 | * as a route_node will not be requeued, if already queued. | |
2159 | * | |
3c0755dc | 2160 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
bcd548ff | 2161 | * state, or static_install_route (when an existing RIB is updated) |
3c0755dc PJ |
2162 | * and then submit route_node to queue for best-path selection later. |
2163 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2164 | * |
2165 | * Deleted RIBs are reaped during best-path selection. | |
2166 | * | |
2167 | * rib_addnode | |
2168 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2169 | * |-------->| | best RIB, if required |
2170 | * | | | |
2171 | * static_install->|->rib_addqueue...... -> rib_process | |
2172 | * | | | |
2173 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2174 | * |-> set RIB_ENTRY_REMOVE | |
2175 | * rib_delnode (RIB freed) | |
2176 | * | |
9fd92e3c AS |
2177 | * The 'info' pointer of a route_node points to a rib_dest_t |
2178 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2179 | * dest is created on-demand by rib_link() and is kept around at least | |
2180 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2181 | * |
2182 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2183 | * | |
2184 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2185 | * - dest attached to route_node: |
2186 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2187 | * - route_node processing queue |
2188 | * - managed by: rib_addqueue, rib_process. | |
2189 | * | |
2190 | */ | |
2191 | ||
718e3744 | 2192 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2193 | static void |
2bf26d41 | 2194 | rib_link (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2195 | { |
2196 | struct rib *head; | |
9fd92e3c | 2197 | rib_dest_t *dest; |
7a4bb9c5 | 2198 | afi_t afi; |
8902474b | 2199 | const char *rmap_name; |
9fd92e3c | 2200 | |
4d38fdb4 | 2201 | assert (rib && rn); |
2202 | ||
9fd92e3c AS |
2203 | dest = rib_dest_from_rnode (rn); |
2204 | if (!dest) | |
6d691129 | 2205 | { |
41ec9222 | 2206 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2207 | rnode_debug (rn, rib->vrf_id, "rn %p adding dest", rn); |
9fd92e3c AS |
2208 | |
2209 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2210 | route_lock_node (rn); /* rn route table reference */ | |
2211 | rn->info = dest; | |
2212 | dest->rnode = rn; | |
2213 | } | |
2214 | ||
2215 | head = dest->routes; | |
2216 | if (head) | |
2217 | { | |
6d691129 | 2218 | head->prev = rib; |
6d691129 | 2219 | } |
718e3744 | 2220 | rib->next = head; |
9fd92e3c | 2221 | dest->routes = rib; |
7a4bb9c5 | 2222 | |
12f6fb97 DS |
2223 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2224 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2225 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
8902474b DS |
2226 | { |
2227 | rmap_name = zebra_get_import_table_route_map (afi, rib->table); | |
2228 | zebra_add_import_table_entry(rn, rib, rmap_name); | |
2229 | } | |
7a4bb9c5 | 2230 | else |
12f6fb97 | 2231 | if (process) |
44e9909d | 2232 | rib_queue_add (rn); |
718e3744 | 2233 | } |
2234 | ||
a1ac18c4 | 2235 | static void |
2bf26d41 | 2236 | rib_addnode (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2237 | { |
6d691129 PJ |
2238 | /* RIB node has been un-removed before route-node is processed. |
2239 | * route_node must hence already be on the queue for processing.. | |
2240 | */ | |
2241 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2242 | { | |
2263a412 DL |
2243 | if (IS_ZEBRA_DEBUG_RIB) |
2244 | rnode_debug (rn, rib->vrf_id, "rn %p, un-removed rib %p", rn, rib); | |
2245 | ||
6d691129 PJ |
2246 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2247 | return; | |
2248 | } | |
2bf26d41 | 2249 | rib_link (rn, rib, process); |
6d691129 PJ |
2250 | } |
2251 | ||
9fd92e3c AS |
2252 | /* |
2253 | * rib_unlink | |
2254 | * | |
2255 | * Detach a rib structure from a route_node. | |
2256 | * | |
2257 | * Note that a call to rib_unlink() should be followed by a call to | |
2258 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2259 | * longer required to be deleted. | |
2260 | */ | |
6d691129 PJ |
2261 | static void |
2262 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2263 | { | |
9fd92e3c | 2264 | rib_dest_t *dest; |
6d691129 | 2265 | |
4d38fdb4 | 2266 | assert (rn && rib); |
6d691129 | 2267 | |
2263a412 DL |
2268 | if (IS_ZEBRA_DEBUG_RIB) |
2269 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p", rn, rib); | |
2270 | ||
9fd92e3c AS |
2271 | dest = rib_dest_from_rnode (rn); |
2272 | ||
718e3744 | 2273 | if (rib->next) |
2274 | rib->next->prev = rib->prev; | |
6d691129 | 2275 | |
718e3744 | 2276 | if (rib->prev) |
2277 | rib->prev->next = rib->next; | |
2278 | else | |
6d691129 | 2279 | { |
9fd92e3c | 2280 | dest->routes = rib->next; |
6d691129 PJ |
2281 | } |
2282 | ||
2283 | /* free RIB and nexthops */ | |
d82ae0de | 2284 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, rib->nexthop, rn); |
a399694f | 2285 | nexthops_free(rib->nexthop); |
6d691129 PJ |
2286 | XFREE (MTYPE_RIB, rib); |
2287 | ||
6d691129 PJ |
2288 | } |
2289 | ||
2290 | static void | |
2291 | rib_delnode (struct route_node *rn, struct rib *rib) | |
2292 | { | |
7a4bb9c5 DS |
2293 | afi_t afi; |
2294 | ||
2263a412 DL |
2295 | if (IS_ZEBRA_DEBUG_RIB) |
2296 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p, removing", rn, rib); | |
6d691129 | 2297 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 | 2298 | |
12f6fb97 DS |
2299 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2300 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2301 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
7a4bb9c5 | 2302 | { |
12f6fb97 | 2303 | zebra_del_import_table_entry(rn, rib); |
7a4bb9c5 | 2304 | /* Just clean up if non main table */ |
41ec9222 | 2305 | if (IS_ZEBRA_DEBUG_RIB) |
2306 | { | |
2307 | char buf[INET6_ADDRSTRLEN]; | |
2308 | if (IS_ZEBRA_DEBUG_RIB) | |
2309 | { | |
2310 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
2311 | zlog_debug ("%u:%s/%d: Freeing route rn %p, rib %p (type %d)", | |
2312 | rib->vrf_id, buf, rn->p.prefixlen, rn, rib, rib->type); | |
2313 | } | |
2314 | } | |
2315 | ||
7a4bb9c5 DS |
2316 | rib_unlink(rn, rib); |
2317 | } | |
12f6fb97 DS |
2318 | else |
2319 | { | |
44e9909d | 2320 | rib_queue_add (rn); |
12f6fb97 | 2321 | } |
718e3744 | 2322 | } |
2323 | ||
2324 | int | |
7c8ff89e | 2325 | rib_add_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7514fb77 | 2326 | struct in_addr *gate, struct in_addr *src, |
78104b9b | 2327 | unsigned int ifindex, vrf_id_t vrf_id, u_int32_t table_id, |
cddf391b | 2328 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2329 | { |
2330 | struct rib *rib; | |
2331 | struct rib *same = NULL; | |
2332 | struct route_table *table; | |
2333 | struct route_node *rn; | |
2334 | struct nexthop *nexthop; | |
2335 | ||
2336 | /* Lookup table. */ | |
ca46a78e | 2337 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, vrf_id, table_id); |
718e3744 | 2338 | if (! table) |
2339 | return 0; | |
2340 | ||
2341 | /* Make it sure prefixlen is applied to the prefix. */ | |
2342 | apply_mask_ipv4 (p); | |
2343 | ||
2344 | /* Set default distance by route type. */ | |
2345 | if (distance == 0) | |
2346 | { | |
837d16cc | 2347 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
2348 | distance = 150; |
2349 | else | |
2350 | distance = route_info[type].distance; | |
718e3744 | 2351 | |
2352 | /* iBGP distance is 200. */ | |
2353 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2354 | distance = 200; | |
2355 | } | |
2356 | ||
2357 | /* Lookup route node.*/ | |
2358 | rn = route_node_get (table, (struct prefix *) p); | |
2359 | ||
2360 | /* If same type of route are installed, treat it as a implicit | |
2361 | withdraw. */ | |
9fd92e3c | 2362 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2363 | { |
6d691129 PJ |
2364 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2365 | continue; | |
2366 | ||
ebf1ead0 | 2367 | if (rib->type != type) |
2368 | continue; | |
7c8ff89e DS |
2369 | if (rib->instance != instance) |
2370 | continue; | |
7a4bb9c5 | 2371 | |
ebf1ead0 | 2372 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2373 | { |
2374 | same = rib; | |
2375 | break; | |
2376 | } | |
ebf1ead0 | 2377 | /* Duplicate connected route comes in. */ |
2378 | else if ((nexthop = rib->nexthop) && | |
2379 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
2380 | nexthop->ifindex == ifindex && |
2381 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2382 | { |
2383 | rib->refcnt++; | |
2384 | return 0 ; | |
2385 | } | |
718e3744 | 2386 | } |
2387 | ||
2388 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2389 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 2390 | rib->type = type; |
7c8ff89e | 2391 | rib->instance = instance; |
718e3744 | 2392 | rib->distance = distance; |
2393 | rib->flags = flags; | |
2394 | rib->metric = metric; | |
7a4bb9c5 | 2395 | rib->table = table_id; |
78104b9b | 2396 | rib->vrf_id = vrf_id; |
718e3744 | 2397 | rib->nexthop_num = 0; |
2398 | rib->uptime = time (NULL); | |
2399 | ||
2400 | /* Nexthop settings. */ | |
2401 | if (gate) | |
2402 | { | |
2403 | if (ifindex) | |
a399694f | 2404 | rib_nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 2405 | else |
a399694f | 2406 | rib_nexthop_ipv4_add (rib, gate, src); |
718e3744 | 2407 | } |
2408 | else | |
a399694f | 2409 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 2410 | |
2411 | /* If this route is kernel route, set FIB flag to the route. */ | |
2412 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2413 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2414 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2415 | ||
2416 | /* Link new rib to node.*/ | |
dc95824a | 2417 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 2418 | { |
2419 | char buf[INET6_ADDRSTRLEN]; | |
2420 | if (IS_ZEBRA_DEBUG_RIB) | |
2421 | { | |
2422 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
2423 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
2424 | "existing %p", | |
2425 | vrf_id, buf, p->prefixlen, rn, rib, rib->type, same); | |
2426 | } | |
2427 | ||
2428 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2429 | rib_dump ((struct prefix *)p, rib); | |
2430 | } | |
2bf26d41 | 2431 | rib_addnode (rn, rib, 1); |
4d38fdb4 | 2432 | |
718e3744 | 2433 | /* Free implicit route.*/ |
2434 | if (same) | |
4d38fdb4 | 2435 | rib_delnode (rn, same); |
2436 | ||
2437 | route_unlock_node (rn); | |
718e3744 | 2438 | return 0; |
2439 | } | |
2440 | ||
dc95824a DO |
2441 | /* This function dumps the contents of a given RIB entry into |
2442 | * standard debug log. Calling function name and IP prefix in | |
2443 | * question are passed as 1st and 2nd arguments. | |
2444 | */ | |
2445 | ||
f7bf4153 DL |
2446 | void _rib_dump (const char * func, |
2447 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2448 | { |
f7bf4153 | 2449 | const struct prefix *p = pp.p; |
4690c7d7 | 2450 | char straddr[PREFIX2STR_BUFFER]; |
fa713d9e CF |
2451 | struct nexthop *nexthop, *tnexthop; |
2452 | int recursing; | |
dc95824a | 2453 | |
78104b9b FL |
2454 | zlog_debug ("%s: dumping RIB entry %p for %s vrf %u", func, rib, |
2455 | prefix2str(pp, straddr, sizeof(straddr)), rib->vrf_id); | |
dc95824a DO |
2456 | zlog_debug |
2457 | ( | |
7c8ff89e | 2458 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2459 | func, |
2460 | rib->refcnt, | |
d02c56cd | 2461 | (unsigned long) rib->uptime, |
dc95824a | 2462 | rib->type, |
7c8ff89e | 2463 | rib->instance, |
dc95824a DO |
2464 | rib->table |
2465 | ); | |
2466 | zlog_debug | |
2467 | ( | |
2468 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
2469 | func, | |
2470 | rib->metric, | |
2471 | rib->distance, | |
2472 | rib->flags, | |
2473 | rib->status | |
2474 | ); | |
2475 | zlog_debug | |
2476 | ( | |
2477 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2478 | func, | |
2479 | rib->nexthop_num, | |
2480 | rib->nexthop_active_num, | |
2481 | rib->nexthop_fib_num | |
2482 | ); | |
fed643f4 | 2483 | |
fa713d9e CF |
2484 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2485 | { | |
fed643f4 | 2486 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2487 | zlog_debug |
2488 | ( | |
2489 | "%s: %s %s with flags %s%s%s", | |
2490 | func, | |
2491 | (recursing ? " NH" : "NH"), | |
2492 | straddr, | |
2493 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2494 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2495 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2496 | ); | |
2497 | } | |
dc95824a DO |
2498 | zlog_debug ("%s: dump complete", func); |
2499 | } | |
2500 | ||
2501 | /* This is an exported helper to rtm_read() to dump the strange | |
2502 | * RIB entry found by rib_lookup_ipv4_route() | |
2503 | */ | |
2504 | ||
12f6fb97 | 2505 | void rib_lookup_and_dump (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
dc95824a DO |
2506 | { |
2507 | struct route_table *table; | |
2508 | struct route_node *rn; | |
2509 | struct rib *rib; | |
2510 | char prefix_buf[INET_ADDRSTRLEN]; | |
2511 | ||
2512 | /* Lookup table. */ | |
12f6fb97 | 2513 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
2514 | if (! table) |
2515 | { | |
b72ede27 | 2516 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2517 | return; |
2518 | } | |
2519 | ||
2520 | inet_ntop (AF_INET, &p->prefix.s_addr, prefix_buf, INET_ADDRSTRLEN); | |
2521 | /* Scan the RIB table for exactly matching RIB entry. */ | |
2522 | rn = route_node_lookup (table, (struct prefix *) p); | |
2523 | ||
2524 | /* No route for this prefix. */ | |
2525 | if (! rn) | |
2526 | { | |
2527 | zlog_debug ("%s: lookup failed for %s/%d", __func__, prefix_buf, p->prefixlen); | |
2528 | return; | |
2529 | } | |
2530 | ||
2531 | /* Unlock node. */ | |
2532 | route_unlock_node (rn); | |
2533 | ||
2534 | /* let's go */ | |
9fd92e3c | 2535 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2536 | { |
2537 | zlog_debug | |
2538 | ( | |
2539 | "%s: rn %p, rib %p: %s, %s", | |
2540 | __func__, | |
2541 | rn, | |
2542 | rib, | |
2543 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), | |
2544 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2545 | ); | |
f7bf4153 | 2546 | rib_dump (p, rib); |
dc95824a DO |
2547 | } |
2548 | } | |
2549 | ||
20e5ff0a DO |
2550 | /* Check if requested address assignment will fail due to another |
2551 | * route being installed by zebra in FIB already. Take necessary | |
2552 | * actions, if needed: remove such a route from FIB and deSELECT | |
2553 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2554 | */ | |
12f6fb97 | 2555 | void rib_lookup_and_pushup (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
20e5ff0a DO |
2556 | { |
2557 | struct route_table *table; | |
2558 | struct route_node *rn; | |
2559 | struct rib *rib; | |
2560 | unsigned changed = 0; | |
2561 | ||
12f6fb97 | 2562 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id))) |
20e5ff0a | 2563 | { |
b72ede27 | 2564 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2565 | return; |
2566 | } | |
2567 | ||
2568 | /* No matches would be the simplest case. */ | |
2569 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2570 | return; | |
2571 | ||
2572 | /* Unlock node. */ | |
2573 | route_unlock_node (rn); | |
2574 | ||
2575 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2576 | * the RN into RIBQ head. If the routing message about the new connected | |
2577 | * route (generated by the IP address we are going to assign very soon) | |
2578 | * comes before the RIBQ is processed, the new RIB entry will join | |
2579 | * RIBQ record already on head. This is necessary for proper revalidation | |
2580 | * of the rest of the RIB. | |
2581 | */ | |
9fd92e3c | 2582 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2583 | { |
2584 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2585 | ! RIB_SYSTEM_ROUTE (rib)) | |
2586 | { | |
2587 | changed = 1; | |
2588 | if (IS_ZEBRA_DEBUG_RIB) | |
2589 | { | |
2590 | char buf[INET_ADDRSTRLEN]; | |
2591 | inet_ntop (rn->p.family, &p->prefix, buf, INET_ADDRSTRLEN); | |
41ec9222 | 2592 | zlog_debug ("%u:%s/%d: freeing way for connected prefix", |
2593 | rib->vrf_id, buf, p->prefixlen); | |
f7bf4153 | 2594 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2595 | } |
2596 | rib_uninstall (rn, rib); | |
2597 | } | |
2598 | } | |
2599 | if (changed) | |
44e9909d | 2600 | rib_queue_add (rn); |
20e5ff0a DO |
2601 | } |
2602 | ||
718e3744 | 2603 | int |
cddf391b | 2604 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2605 | { |
2606 | struct route_table *table; | |
2607 | struct route_node *rn; | |
2608 | struct rib *same; | |
2609 | struct nexthop *nexthop; | |
04b02fda | 2610 | int ret = 0; |
4d38fdb4 | 2611 | |
718e3744 | 2612 | /* Lookup table. */ |
ca46a78e | 2613 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, rib->vrf_id, rib->table); |
718e3744 | 2614 | if (! table) |
2615 | return 0; | |
cddf391b | 2616 | |
718e3744 | 2617 | /* Make it sure prefixlen is applied to the prefix. */ |
2618 | apply_mask_ipv4 (p); | |
2619 | ||
2620 | /* Set default distance by route type. */ | |
2621 | if (rib->distance == 0) | |
2622 | { | |
2623 | rib->distance = route_info[rib->type].distance; | |
2624 | ||
2625 | /* iBGP distance is 200. */ | |
2626 | if (rib->type == ZEBRA_ROUTE_BGP | |
2627 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2628 | rib->distance = 200; | |
2629 | } | |
2630 | ||
2631 | /* Lookup route node.*/ | |
2632 | rn = route_node_get (table, (struct prefix *) p); | |
2633 | ||
2634 | /* If same type of route are installed, treat it as a implicit | |
2635 | withdraw. */ | |
9fd92e3c | 2636 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2637 | { |
0b8c4f1d | 2638 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2639 | continue; |
2640 | ||
7c8ff89e DS |
2641 | if (same->type == rib->type && same->instance == rib->instance |
2642 | && same->table == rib->table | |
718e3744 | 2643 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2644 | break; |
718e3744 | 2645 | } |
4d38fdb4 | 2646 | |
718e3744 | 2647 | /* If this route is kernel route, set FIB flag to the route. */ |
2648 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2649 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2650 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2651 | ||
2652 | /* Link new rib to node.*/ | |
41ec9222 | 2653 | if (IS_ZEBRA_DEBUG_RIB) |
2654 | { | |
2655 | char buf[INET6_ADDRSTRLEN]; | |
2656 | if (IS_ZEBRA_DEBUG_RIB) | |
2657 | { | |
2658 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
2659 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
2660 | "existing %p", | |
2661 | rib->vrf_id, buf, p->prefixlen, rn, rib, rib->type, same); | |
2662 | } | |
2663 | ||
2664 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2665 | rib_dump ((struct prefix *)p, rib); | |
2666 | } | |
2bf26d41 | 2667 | rib_addnode (rn, rib, 1); |
04b02fda | 2668 | ret = 1; |
718e3744 | 2669 | |
718e3744 | 2670 | /* Free implicit route.*/ |
2671 | if (same) | |
dc95824a | 2672 | { |
41ec9222 | 2673 | rib_delnode (rn, same); |
2674 | ret = -1; | |
dc95824a | 2675 | } |
4d38fdb4 | 2676 | |
2677 | route_unlock_node (rn); | |
04b02fda | 2678 | return ret; |
718e3744 | 2679 | } |
2680 | ||
ebf1ead0 | 2681 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2682 | int |
7c8ff89e | 2683 | rib_delete_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
78104b9b | 2684 | struct in_addr *gate, unsigned int ifindex, vrf_id_t vrf_id, |
7a4bb9c5 | 2685 | u_int32_t table_id, safi_t safi) |
718e3744 | 2686 | { |
2687 | struct route_table *table; | |
2688 | struct route_node *rn; | |
2689 | struct rib *rib; | |
2690 | struct rib *fib = NULL; | |
2691 | struct rib *same = NULL; | |
fa713d9e CF |
2692 | struct nexthop *nexthop, *tnexthop; |
2693 | int recursing; | |
4690c7d7 | 2694 | char buf1[PREFIX2STR_BUFFER]; |
41ec9222 | 2695 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 2696 | |
2697 | /* Lookup table. */ | |
ca46a78e | 2698 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, vrf_id, table_id); |
718e3744 | 2699 | if (! table) |
2700 | return 0; | |
2701 | ||
2702 | /* Apply mask. */ | |
2703 | apply_mask_ipv4 (p); | |
2704 | ||
2705 | /* Lookup route node. */ | |
2706 | rn = route_node_lookup (table, (struct prefix *) p); | |
2707 | if (! rn) | |
2708 | { | |
41ec9222 | 2709 | if (IS_ZEBRA_DEBUG_RIB) |
2710 | zlog_debug ("%u:%s/%d: doesn't exist in rib", | |
2711 | vrf_id, inet_ntop (p->family, &p->prefix, buf1, INET6_ADDRSTRLEN), | |
2712 | p->prefixlen); | |
718e3744 | 2713 | return ZEBRA_ERR_RTNOEXIST; |
2714 | } | |
2715 | ||
2716 | /* Lookup same type route. */ | |
9fd92e3c | 2717 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2718 | { |
6d691129 PJ |
2719 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2720 | continue; | |
2721 | ||
718e3744 | 2722 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2723 | fib = rib; | |
2724 | ||
ebf1ead0 | 2725 | if (rib->type != type) |
2726 | continue; | |
7c8ff89e DS |
2727 | if (rib->instance != instance) |
2728 | continue; | |
ebf1ead0 | 2729 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2730 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2731 | { |
4f1735fd MF |
2732 | if (nexthop->ifindex != ifindex) |
2733 | continue; | |
ebf1ead0 | 2734 | if (rib->refcnt) |
718e3744 | 2735 | { |
ebf1ead0 | 2736 | rib->refcnt--; |
2737 | route_unlock_node (rn); | |
2738 | route_unlock_node (rn); | |
2739 | return 0; | |
718e3744 | 2740 | } |
ebf1ead0 | 2741 | same = rib; |
2742 | break; | |
718e3744 | 2743 | } |
ebf1ead0 | 2744 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2745 | else |
5ec90d28 | 2746 | { |
fa713d9e CF |
2747 | if (gate == NULL) |
2748 | { | |
2749 | same = rib; | |
2750 | break; | |
2751 | } | |
2752 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
2753 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate)) | |
2754 | { | |
2755 | same = rib; | |
2756 | break; | |
2757 | } | |
2758 | if (same) | |
2759 | break; | |
2760 | } | |
718e3744 | 2761 | } |
718e3744 | 2762 | /* If same type of route can't be found and this message is from |
2763 | kernel. */ | |
2764 | if (! same) | |
2765 | { | |
2037f143 DS |
2766 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2767 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2768 | { | |
41ec9222 | 2769 | if (IS_ZEBRA_DEBUG_RIB) |
2037f143 | 2770 | { |
41ec9222 | 2771 | zlog_debug ("%u:%s/%d: rn %p, rib %p (type %d) was deleted " |
2772 | "from kernel, adding", | |
2773 | vrf_id, inet_ntop (p->family, &p->prefix, buf1, INET6_ADDRSTRLEN), | |
2774 | p->prefixlen, rn, fib, fib->type); | |
2037f143 | 2775 | } |
6baf7bb8 DS |
2776 | if (allow_delete) |
2777 | { | |
2778 | /* Unset flags. */ | |
2779 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2780 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2781 | ||
2782 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2783 | } | |
2784 | else | |
2785 | { | |
2786 | /* This means someone else, other than Zebra, has deleted | |
2787 | * a Zebra router from the kernel. We will add it back */ | |
2788 | rib_install_kernel(rn, fib, 0); | |
2789 | } | |
2037f143 | 2790 | } |
718e3744 | 2791 | else |
2792 | { | |
41ec9222 | 2793 | if (IS_ZEBRA_DEBUG_RIB) |
718e3744 | 2794 | { |
2795 | if (gate) | |
41ec9222 | 2796 | zlog_debug ("%u:%s: via %s ifindex %d type %d " |
78104b9b | 2797 | "doesn't exist in rib", |
41ec9222 | 2798 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
81cce018 | 2799 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), |
718e3744 | 2800 | ifindex, |
2801 | type); | |
2802 | else | |
41ec9222 | 2803 | zlog_debug ("%u:%s: ifindex %d type %d doesn't exist in rib", |
2804 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), | |
718e3744 | 2805 | ifindex, |
2806 | type); | |
2807 | } | |
2808 | route_unlock_node (rn); | |
2809 | return ZEBRA_ERR_RTNOEXIST; | |
2810 | } | |
2811 | } | |
4d38fdb4 | 2812 | |
718e3744 | 2813 | if (same) |
4d38fdb4 | 2814 | rib_delnode (rn, same); |
2815 | ||
718e3744 | 2816 | route_unlock_node (rn); |
718e3744 | 2817 | return 0; |
2818 | } | |
6b0655a2 | 2819 | |
718e3744 | 2820 | /* Install static route into rib. */ |
fb148af4 | 2821 | void |
bcd548ff | 2822 | static_install_route (afi_t afi, safi_t safi, struct prefix *p, struct static_route *si) |
718e3744 | 2823 | { |
2824 | struct rib *rib; | |
2825 | struct route_node *rn; | |
2826 | struct route_table *table; | |
6e26278c | 2827 | struct prefix nh_p; |
718e3744 | 2828 | |
2829 | /* Lookup table. */ | |
be5e48ab | 2830 | table = zebra_vrf_table (afi, safi, si->vrf_id); |
718e3744 | 2831 | if (! table) |
2832 | return; | |
2833 | ||
2834 | /* Lookup existing route */ | |
2835 | rn = route_node_get (table, p); | |
9fd92e3c | 2836 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2837 | { |
2838 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2839 | continue; | |
2840 | ||
2841 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2842 | break; | |
2843 | } | |
718e3744 | 2844 | |
2845 | if (rib) | |
2846 | { | |
0d9551dc DS |
2847 | /* if tag value changed , update old value in RIB */ |
2848 | if (rib->tag != si->tag) | |
2849 | rib->tag = si->tag; | |
2850 | ||
718e3744 | 2851 | /* Same distance static route is there. Update it with new |
2852 | nexthop. */ | |
718e3744 | 2853 | route_unlock_node (rn); |
718e3744 | 2854 | switch (si->type) |
7021c425 | 2855 | { |
bcd548ff | 2856 | case STATIC_IPV4_GATEWAY: |
a399694f | 2857 | rib_nexthop_ipv4_add (rib, &si->addr.ipv4, NULL); |
bcd548ff DS |
2858 | nh_p.family = AF_INET; |
2859 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2860 | nh_p.u.prefix4 = si->addr.ipv4; | |
d82ae0de | 2861 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 2862 | break; |
ba779241 DS |
2863 | case STATIC_IFINDEX: |
2864 | rib_nexthop_ifindex_add (rib, si->ifindex); | |
bcd548ff DS |
2865 | break; |
2866 | case STATIC_IPV4_BLACKHOLE: | |
a399694f | 2867 | rib_nexthop_blackhole_add (rib); |
bcd548ff DS |
2868 | break; |
2869 | case STATIC_IPV6_GATEWAY: | |
a399694f | 2870 | rib_nexthop_ipv6_add (rib, &si->addr.ipv6); |
bcd548ff DS |
2871 | nh_p.family = AF_INET6; |
2872 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
2873 | nh_p.u.prefix6 = si->addr.ipv6; | |
d82ae0de | 2874 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 2875 | break; |
ba779241 DS |
2876 | case STATIC_IPV6_GATEWAY_IFINDEX: |
2877 | rib_nexthop_ipv6_ifindex_add (rib, &si->addr.ipv6, si->ifindex); | |
bcd548ff | 2878 | break; |
4d38fdb4 | 2879 | } |
41ec9222 | 2880 | |
2881 | if (IS_ZEBRA_DEBUG_RIB) | |
2882 | { | |
2883 | char buf[INET6_ADDRSTRLEN]; | |
2884 | if (IS_ZEBRA_DEBUG_RIB) | |
2885 | { | |
2886 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
2887 | zlog_debug ("%u:%s/%d: Modifying route rn %p, rib %p (type %d)", | |
2888 | si->vrf_id, buf, p->prefixlen, rn, rib, rib->type); | |
2889 | } | |
2890 | } | |
2bf26d41 | 2891 | /* Schedule route for processing or invoke NHT, as appropriate. */ |
2892 | if (si->type == STATIC_IPV4_GATEWAY || | |
2893 | si->type == STATIC_IPV6_GATEWAY) | |
2894 | zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, RNH_NEXTHOP_TYPE, &nh_p); | |
2895 | else | |
44e9909d | 2896 | rib_queue_add (rn); |
718e3744 | 2897 | } |
2898 | else | |
2899 | { | |
2900 | /* This is new static route. */ | |
4d38fdb4 | 2901 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2902 | ||
718e3744 | 2903 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 2904 | rib->instance = 0; |
718e3744 | 2905 | rib->distance = si->distance; |
2906 | rib->metric = 0; | |
8f527c5e | 2907 | rib->vrf_id = si->vrf_id; |
12f6fb97 | 2908 | rib->table = si->vrf_id ? (zebra_vrf_lookup(si->vrf_id))->table_id : zebrad.rtm_table_default; |
718e3744 | 2909 | rib->nexthop_num = 0; |
0d9551dc | 2910 | rib->tag = si->tag; |
718e3744 | 2911 | |
2912 | switch (si->type) | |
7021c425 | 2913 | { |
bcd548ff | 2914 | case STATIC_IPV4_GATEWAY: |
a399694f | 2915 | rib_nexthop_ipv4_add (rib, &si->addr.ipv4, NULL); |
bcd548ff DS |
2916 | nh_p.family = AF_INET; |
2917 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2918 | nh_p.u.prefix4 = si->addr.ipv4; | |
d82ae0de | 2919 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 2920 | break; |
ba779241 DS |
2921 | case STATIC_IFINDEX: |
2922 | rib_nexthop_ifindex_add (rib, si->ifindex); | |
bcd548ff DS |
2923 | break; |
2924 | case STATIC_IPV4_BLACKHOLE: | |
a399694f | 2925 | rib_nexthop_blackhole_add (rib); |
bcd548ff DS |
2926 | break; |
2927 | case STATIC_IPV6_GATEWAY: | |
a399694f | 2928 | rib_nexthop_ipv6_add (rib, &si->addr.ipv6); |
bcd548ff DS |
2929 | nh_p.family = AF_INET6; |
2930 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
2931 | nh_p.u.prefix6 = si->addr.ipv6; | |
d82ae0de | 2932 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 2933 | break; |
ba779241 DS |
2934 | case STATIC_IPV6_GATEWAY_IFINDEX: |
2935 | rib_nexthop_ipv6_ifindex_add (rib, &si->addr.ipv6, si->ifindex); | |
bcd548ff | 2936 | break; |
7021c425 | 2937 | } |
718e3744 | 2938 | |
81dfcaa2 | 2939 | /* Save the flags of this static routes (reject, blackhole) */ |
2940 | rib->flags = si->flags; | |
2941 | ||
41ec9222 | 2942 | if (IS_ZEBRA_DEBUG_RIB) |
2943 | { | |
2944 | char buf[INET6_ADDRSTRLEN]; | |
2945 | if (IS_ZEBRA_DEBUG_RIB) | |
2946 | { | |
2947 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
2948 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d)", | |
2949 | si->vrf_id, buf, p->prefixlen, rn, rib, rib->type); | |
2950 | } | |
2951 | } | |
2bf26d41 | 2952 | /* Link this rib to the tree. Schedule for processing or invoke NHT, |
2953 | * as appropriate. | |
2954 | */ | |
2955 | if (si->type == STATIC_IPV4_GATEWAY || | |
2956 | si->type == STATIC_IPV6_GATEWAY) | |
2957 | { | |
2958 | rib_addnode (rn, rib, 0); | |
2959 | zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, RNH_NEXTHOP_TYPE, &nh_p); | |
2960 | } | |
2961 | else | |
2962 | rib_addnode (rn, rib, 1); | |
718e3744 | 2963 | } |
2964 | } | |
2965 | ||
a1ac18c4 | 2966 | static int |
f2b49ed0 | 2967 | static_nexthop_same (struct nexthop *nexthop, struct static_route *si) |
718e3744 | 2968 | { |
2969 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
2970 | && si->type == STATIC_IPV4_GATEWAY | |
c0551cbb | 2971 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->addr.ipv4)) |
718e3744 | 2972 | return 1; |
ba779241 DS |
2973 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
2974 | && si->type == STATIC_IFINDEX | |
2975 | && nexthop->ifindex == si->ifindex) | |
718e3744 | 2976 | return 1; |
595db7f1 | 2977 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
2978 | && si->type == STATIC_IPV4_BLACKHOLE) | |
2979 | return 1; | |
f2b49ed0 DS |
2980 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
2981 | && si->type == STATIC_IPV6_GATEWAY | |
2982 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->addr.ipv6)) | |
2983 | return 1; | |
ba779241 DS |
2984 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX |
2985 | && si->type == STATIC_IPV6_GATEWAY_IFINDEX | |
f2b49ed0 | 2986 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->addr.ipv6) |
ba779241 | 2987 | && nexthop->ifindex == si->ifindex) |
f2b49ed0 | 2988 | return 1; |
e8e1946e | 2989 | return 0; |
718e3744 | 2990 | } |
2991 | ||
2992 | /* Uninstall static route from RIB. */ | |
fb148af4 | 2993 | void |
b8a1effa | 2994 | static_uninstall_route (afi_t afi, safi_t safi, struct prefix *p, struct static_route *si) |
718e3744 | 2995 | { |
2996 | struct route_node *rn; | |
2997 | struct rib *rib; | |
2998 | struct nexthop *nexthop; | |
2999 | struct route_table *table; | |
6e26278c | 3000 | struct prefix nh_p; |
718e3744 | 3001 | |
3002 | /* Lookup table. */ | |
be5e48ab | 3003 | table = zebra_vrf_table (afi, safi, si->vrf_id); |
718e3744 | 3004 | if (! table) |
3005 | return; | |
4d38fdb4 | 3006 | |
718e3744 | 3007 | /* Lookup existing route with type and distance. */ |
3008 | rn = route_node_lookup (table, p); | |
3009 | if (! rn) | |
3010 | return; | |
3011 | ||
9fd92e3c | 3012 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3013 | { |
3014 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
3015 | continue; | |
3016 | ||
0d9551dc DS |
3017 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
3018 | rib->tag == si->tag) | |
6d691129 PJ |
3019 | break; |
3020 | } | |
718e3744 | 3021 | |
3022 | if (! rib) | |
3023 | { | |
3024 | route_unlock_node (rn); | |
3025 | return; | |
3026 | } | |
3027 | ||
3028 | /* Lookup nexthop. */ | |
3029 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
f2b49ed0 | 3030 | if (static_nexthop_same (nexthop, si)) |
718e3744 | 3031 | break; |
3032 | ||
3033 | /* Can't find nexthop. */ | |
3034 | if (! nexthop) | |
3035 | { | |
3036 | route_unlock_node (rn); | |
3037 | return; | |
3038 | } | |
3039 | ||
3040 | /* Check nexthop. */ | |
3041 | if (rib->nexthop_num == 1) | |
6d691129 | 3042 | rib_delnode (rn, rib); |
718e3744 | 3043 | else |
3044 | { | |
94ad353d DS |
3045 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
3046 | * the nexthop. There is no need to re-evaluate the route for this | |
3047 | * scenario. | |
3048 | */ | |
41ec9222 | 3049 | if (IS_ZEBRA_DEBUG_RIB) |
3050 | { | |
3051 | char buf[INET6_ADDRSTRLEN]; | |
3052 | if (IS_ZEBRA_DEBUG_RIB) | |
3053 | { | |
3054 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
3055 | zlog_debug ("%u:%s/%d: Modifying route rn %p, rib %p (type %d)", | |
3056 | si->vrf_id, buf, p->prefixlen, rn, rib, rib->type); | |
3057 | } | |
3058 | } | |
94ad353d | 3059 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
6baeb988 | 3060 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d | 3061 | { |
dccc5225 | 3062 | /* If there are other active nexthops, do an update. */ |
3063 | if (rib->nexthop_active_num > 1) | |
3064 | { | |
3065 | rib_install_kernel (rn, rib, 1); | |
3066 | redistribute_update (&rn->p, rib, NULL); | |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | redistribute_delete (&rn->p, rib); | |
3071 | rib_uninstall_kernel (rn, rib); | |
3072 | } | |
94ad353d | 3073 | } |
6e26278c | 3074 | |
b8a1effa DS |
3075 | if (afi == AFI_IP) |
3076 | { | |
3077 | /* Delete the nexthop and dereg from NHT */ | |
3078 | nh_p.family = AF_INET; | |
3079 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
3080 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
3081 | } | |
3082 | else | |
3083 | { | |
3084 | nh_p.family = AF_INET6; | |
3085 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3086 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
3087 | } | |
a399694f | 3088 | rib_nexthop_delete (rib, nexthop); |
d82ae0de | 3089 | zebra_deregister_rnh_static_nh(si->vrf_id, &nh_p, rn); |
a399694f | 3090 | nexthop_free (nexthop); |
718e3744 | 3091 | } |
718e3744 | 3092 | /* Unlock node. */ |
3093 | route_unlock_node (rn); | |
3094 | } | |
3095 | ||
718e3744 | 3096 | int |
b78a80d7 | 3097 | static_add_ipv4 (safi_t safi, struct prefix *p, struct in_addr *gate, unsigned int ifindex, |
a3d21ef3 DS |
3098 | const char *ifname, u_char flags, u_short tag, |
3099 | u_char distance, struct zebra_vrf *zvrf) | |
718e3744 | 3100 | { |
3101 | u_char type = 0; | |
3102 | struct route_node *rn; | |
c0551cbb DS |
3103 | struct static_route *si; |
3104 | struct static_route *pp; | |
3105 | struct static_route *cp; | |
3106 | struct static_route *update = NULL; | |
b78a80d7 | 3107 | struct route_table *stable = zvrf->stable[AFI_IP][safi]; |
718e3744 | 3108 | |
718e3744 | 3109 | if (! stable) |
3110 | return -1; | |
3111 | ||
3112 | /* Lookup static route prefix. */ | |
3113 | rn = route_node_get (stable, p); | |
3114 | ||
3115 | /* Make flags. */ | |
3116 | if (gate) | |
3117 | type = STATIC_IPV4_GATEWAY; | |
ba779241 DS |
3118 | else if (ifindex) |
3119 | type = STATIC_IFINDEX; | |
595db7f1 | 3120 | else |
3121 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 3122 | |
3123 | /* Do nothing if there is a same static route. */ | |
3124 | for (si = rn->info; si; si = si->next) | |
3125 | { | |
3126 | if (type == si->type | |
c0551cbb | 3127 | && (! gate || IPV4_ADDR_SAME (gate, &si->addr.ipv4)) |
ba779241 | 3128 | && (! ifindex || ifindex == si->ifindex)) |
718e3744 | 3129 | { |
0d9551dc | 3130 | if ((distance == si->distance) && (tag == si->tag)) |
718e3744 | 3131 | { |
3132 | route_unlock_node (rn); | |
3133 | return 0; | |
3134 | } | |
3135 | else | |
3136 | update = si; | |
3137 | } | |
3138 | } | |
3139 | ||
0d9551dc | 3140 | /* Distance or tag changed. */ |
718e3744 | 3141 | if (update) |
b78a80d7 | 3142 | static_delete_ipv4 (safi, p, gate, ifindex, update->tag, update->distance, zvrf); |
718e3744 | 3143 | |
3144 | /* Make new static route structure. */ | |
c0551cbb | 3145 | si = XCALLOC (MTYPE_STATIC_ROUTE, sizeof (struct static_route)); |
718e3744 | 3146 | |
3147 | si->type = type; | |
3148 | si->distance = distance; | |
81dfcaa2 | 3149 | si->flags = flags; |
0d9551dc | 3150 | si->tag = tag; |
b9f1114e | 3151 | si->vrf_id = zvrf->vrf_id; |
ba779241 | 3152 | si->ifindex = ifindex; |
fb148af4 | 3153 | if (si->ifindex) |
a3d21ef3 | 3154 | strcpy(si->ifname, ifname); |
718e3744 | 3155 | |
3156 | if (gate) | |
c0551cbb | 3157 | si->addr.ipv4 = *gate; |
718e3744 | 3158 | |
3159 | /* Add new static route information to the tree with sort by | |
3160 | distance value and gateway address. */ | |
3161 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3162 | { | |
3163 | if (si->distance < cp->distance) | |
3164 | break; | |
3165 | if (si->distance > cp->distance) | |
3166 | continue; | |
3167 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
3168 | { | |
c0551cbb | 3169 | if (ntohl (si->addr.ipv4.s_addr) < ntohl (cp->addr.ipv4.s_addr)) |
718e3744 | 3170 | break; |
c0551cbb | 3171 | if (ntohl (si->addr.ipv4.s_addr) > ntohl (cp->addr.ipv4.s_addr)) |
718e3744 | 3172 | continue; |
3173 | } | |
3174 | } | |
3175 | ||
3176 | /* Make linked list. */ | |
3177 | if (pp) | |
3178 | pp->next = si; | |
3179 | else | |
3180 | rn->info = si; | |
3181 | if (cp) | |
3182 | cp->prev = si; | |
3183 | si->prev = pp; | |
3184 | si->next = cp; | |
3185 | ||
3186 | /* Install into rib. */ | |
b78a80d7 | 3187 | static_install_route (AFI_IP, safi, p, si); |
718e3744 | 3188 | |
3189 | return 1; | |
3190 | } | |
3191 | ||
718e3744 | 3192 | int |
b78a80d7 | 3193 | static_delete_ipv4 (safi_t safi, struct prefix *p, struct in_addr *gate, unsigned int ifindex, |
b9f1114e | 3194 | u_short tag, u_char distance, struct zebra_vrf *zvrf) |
718e3744 | 3195 | { |
3196 | u_char type = 0; | |
3197 | struct route_node *rn; | |
c0551cbb | 3198 | struct static_route *si; |
718e3744 | 3199 | struct route_table *stable; |
3200 | ||
3201 | /* Lookup table. */ | |
b78a80d7 | 3202 | stable = zebra_vrf_static_table (AFI_IP, safi, zvrf); |
718e3744 | 3203 | if (! stable) |
3204 | return -1; | |
3205 | ||
3206 | /* Lookup static route prefix. */ | |
3207 | rn = route_node_lookup (stable, p); | |
3208 | if (! rn) | |
3209 | return 0; | |
3210 | ||
3211 | /* Make flags. */ | |
3212 | if (gate) | |
3213 | type = STATIC_IPV4_GATEWAY; | |
ba779241 DS |
3214 | else if (ifindex) |
3215 | type = STATIC_IFINDEX; | |
595db7f1 | 3216 | else |
3217 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 3218 | |
3219 | /* Find same static route is the tree */ | |
3220 | for (si = rn->info; si; si = si->next) | |
3221 | if (type == si->type | |
c0551cbb | 3222 | && (! gate || IPV4_ADDR_SAME (gate, &si->addr.ipv4)) |
ba779241 | 3223 | && (! ifindex || ifindex == si->ifindex) |
0d9551dc | 3224 | && (! tag || (tag == si->tag))) |
718e3744 | 3225 | break; |
3226 | ||
3227 | /* Can't find static route. */ | |
3228 | if (! si) | |
3229 | { | |
3230 | route_unlock_node (rn); | |
3231 | return 0; | |
3232 | } | |
3233 | ||
3234 | /* Install into rib. */ | |
b78a80d7 | 3235 | static_uninstall_route (AFI_IP, safi, p, si); |
718e3744 | 3236 | |
3237 | /* Unlink static route from linked list. */ | |
3238 | if (si->prev) | |
3239 | si->prev->next = si->next; | |
3240 | else | |
3241 | rn->info = si->next; | |
3242 | if (si->next) | |
3243 | si->next->prev = si->prev; | |
143a385f | 3244 | route_unlock_node (rn); |
718e3744 | 3245 | |
3246 | /* Free static route configuration. */ | |
c0551cbb | 3247 | XFREE (MTYPE_STATIC_ROUTE, si); |
718e3744 | 3248 | |
143a385f | 3249 | route_unlock_node (rn); |
3250 | ||
718e3744 | 3251 | return 1; |
3252 | } | |
3253 | ||
718e3744 | 3254 | int |
7c8ff89e | 3255 | rib_add_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
78104b9b FL |
3256 | struct in6_addr *gate, unsigned int ifindex, vrf_id_t vrf_id, |
3257 | u_int32_t table_id, u_int32_t metric, u_char distance, safi_t safi) | |
718e3744 | 3258 | { |
3259 | struct rib *rib; | |
3260 | struct rib *same = NULL; | |
3261 | struct route_table *table; | |
3262 | struct route_node *rn; | |
3263 | struct nexthop *nexthop; | |
3264 | ||
718e3744 | 3265 | /* Lookup table. */ |
ca46a78e | 3266 | table = zebra_vrf_table_with_table_id (AFI_IP6, safi, vrf_id, table_id); |
718e3744 | 3267 | if (! table) |
3268 | return 0; | |
3269 | ||
3270 | /* Make sure mask is applied. */ | |
3271 | apply_mask_ipv6 (p); | |
3272 | ||
3273 | /* Set default distance by route type. */ | |
be61c4eb | 3274 | if (!distance) |
3275 | distance = route_info[type].distance; | |
718e3744 | 3276 | |
3277 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
3278 | distance = 200; | |
3279 | ||
718e3744 | 3280 | /* Lookup route node.*/ |
3281 | rn = route_node_get (table, (struct prefix *) p); | |
3282 | ||
3283 | /* If same type of route are installed, treat it as a implicit | |
3284 | withdraw. */ | |
9fd92e3c | 3285 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3286 | { |
6d691129 PJ |
3287 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3288 | continue; | |
3289 | ||
ebf1ead0 | 3290 | if (rib->type != type) |
3291 | continue; | |
7c8ff89e DS |
3292 | if (rib->instance != instance) |
3293 | continue; | |
ebf1ead0 | 3294 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 3295 | { |
3296 | same = rib; | |
718e3744 | 3297 | break; |
3298 | } | |
ebf1ead0 | 3299 | else if ((nexthop = rib->nexthop) && |
3300 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3301 | nexthop->ifindex == ifindex) | |
3302 | { | |
3303 | rib->refcnt++; | |
3304 | return 0; | |
3305 | } | |
718e3744 | 3306 | } |
3307 | ||
3308 | /* Allocate new rib structure. */ | |
4d38fdb4 | 3309 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3310 | ||
718e3744 | 3311 | rib->type = type; |
7c8ff89e | 3312 | rib->instance = instance; |
718e3744 | 3313 | rib->distance = distance; |
3314 | rib->flags = flags; | |
3315 | rib->metric = metric; | |
7a4bb9c5 | 3316 | rib->table = table_id; |
78104b9b | 3317 | rib->vrf_id = vrf_id; |
718e3744 | 3318 | rib->nexthop_num = 0; |
3319 | rib->uptime = time (NULL); | |
3320 | ||
3321 | /* Nexthop settings. */ | |
3322 | if (gate) | |
3323 | { | |
3324 | if (ifindex) | |
a399694f | 3325 | rib_nexthop_ipv6_ifindex_add (rib, gate, ifindex); |
718e3744 | 3326 | else |
a399694f | 3327 | rib_nexthop_ipv6_add (rib, gate); |
718e3744 | 3328 | } |
3329 | else | |
a399694f | 3330 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 3331 | |
3332 | /* If this route is kernel route, set FIB flag to the route. */ | |
3333 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
3334 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3335 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3336 | ||
3337 | /* Link new rib to node.*/ | |
fed643f4 | 3338 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 3339 | { |
3340 | char buf[INET6_ADDRSTRLEN]; | |
3341 | if (IS_ZEBRA_DEBUG_RIB) | |
3342 | { | |
3343 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
3344 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
3345 | "existing %p", | |
3346 | vrf_id, buf, p->prefixlen, rn, rib, rib->type, same); | |
3347 | } | |
3348 | ||
3349 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
3350 | rib_dump ((struct prefix *)p, rib); | |
3351 | } | |
2bf26d41 | 3352 | rib_addnode (rn, rib, 1); |
718e3744 | 3353 | |
718e3744 | 3354 | /* Free implicit route.*/ |
3355 | if (same) | |
4d38fdb4 | 3356 | rib_delnode (rn, same); |
3357 | ||
3358 | route_unlock_node (rn); | |
718e3744 | 3359 | return 0; |
3360 | } | |
3361 | ||
41fc2714 | 3362 | int |
8a92a8a0 | 3363 | rib_add_ipv6_multipath (struct prefix *p, struct rib *rib, safi_t safi, |
41fc2714 DS |
3364 | unsigned long ifindex) |
3365 | { | |
3366 | struct route_table *table; | |
3367 | struct route_node *rn; | |
3368 | struct rib *same = NULL; | |
3369 | struct nexthop *nexthop; | |
3370 | int ret = 0; | |
154caaed | 3371 | int family; |
3372 | ||
3373 | if (!rib) | |
3374 | return 0; | |
41fc2714 | 3375 | |
8a92a8a0 | 3376 | if (p->family == AF_INET) |
154caaed | 3377 | family = AFI_IP; |
3378 | else | |
3379 | family = AFI_IP6; | |
8a92a8a0 | 3380 | |
154caaed | 3381 | /* Lookup table. */ |
3382 | table = zebra_vrf_table_with_table_id (family, safi, rib->vrf_id, rib->table); | |
3383 | if (! table) | |
3384 | return 0; | |
3385 | ||
3386 | if (p->family == AF_INET) | |
3387 | { | |
8a92a8a0 | 3388 | /* Make it sure prefixlen is applied to the prefix. */ |
88177fe3 | 3389 | apply_mask_ipv4 ((struct prefix_ipv4 *)p); |
7a4bb9c5 DS |
3390 | } |
3391 | else | |
3392 | { | |
8a92a8a0 | 3393 | /* Make sure mask is applied. */ |
88177fe3 | 3394 | apply_mask_ipv6 ((struct prefix_ipv6 *)p); |
8a92a8a0 | 3395 | } |
41fc2714 DS |
3396 | |
3397 | /* Set default distance by route type. */ | |
3398 | if (rib->distance == 0) | |
3399 | { | |
3400 | rib->distance = route_info[rib->type].distance; | |
3401 | ||
3402 | /* iBGP distance is 200. */ | |
3403 | if (rib->type == ZEBRA_ROUTE_BGP | |
3404 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
3405 | rib->distance = 200; | |
3406 | } | |
3407 | ||
3408 | /* Lookup route node.*/ | |
3409 | rn = route_node_get (table, (struct prefix *) p); | |
3410 | ||
3411 | /* If same type of route are installed, treat it as a implicit | |
3412 | withdraw. */ | |
3413 | RNODE_FOREACH_RIB (rn, same) { | |
3414 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
3415 | continue; | |
3416 | } | |
3417 | if (same->type != rib->type) { | |
3418 | continue; | |
3419 | } | |
3420 | ||
7c8ff89e DS |
3421 | if (same->instance != rib->instance) { |
3422 | continue; | |
3423 | } | |
3424 | ||
41fc2714 DS |
3425 | if (same->table != rib->table) { |
3426 | continue; | |
3427 | } | |
3428 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
3429 | break; | |
3430 | } | |
3431 | else if ((nexthop = same->nexthop) && | |
3432 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3433 | nexthop->ifindex == ifindex) { | |
3434 | same->refcnt++; | |
3435 | return 0; | |
3436 | } | |
3437 | } | |
3438 | ||
3439 | /* If this route is kernel route, set FIB flag to the route. */ | |
3440 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
3441 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
3442 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3443 | } | |
3444 | } | |
3445 | ||
3446 | /* Link new rib to node.*/ | |
41ec9222 | 3447 | if (IS_ZEBRA_DEBUG_RIB) |
3448 | { | |
3449 | char buf[INET6_ADDRSTRLEN]; | |
3450 | if (IS_ZEBRA_DEBUG_RIB) | |
3451 | { | |
3452 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
3453 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
3454 | "existing %p", | |
3455 | rib->vrf_id, buf, p->prefixlen, rn, rib, rib->type, same); | |
3456 | } | |
3457 | ||
3458 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
3459 | rib_dump ((struct prefix *)p, rib); | |
3460 | } | |
2bf26d41 | 3461 | rib_addnode (rn, rib, 1); |
41fc2714 | 3462 | ret = 1; |
41ec9222 | 3463 | |
41fc2714 DS |
3464 | /* Free implicit route.*/ |
3465 | if (same) | |
41fc2714 | 3466 | { |
41ec9222 | 3467 | rib_delnode (rn, same); |
3468 | ret = -1; | |
41fc2714 | 3469 | } |
41fc2714 DS |
3470 | |
3471 | route_unlock_node (rn); | |
3472 | return ret; | |
3473 | } | |
3474 | ||
ebf1ead0 | 3475 | /* XXX factor with rib_delete_ipv6 */ |
12f6fb97 | 3476 | |
718e3744 | 3477 | int |
7c8ff89e | 3478 | rib_delete_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
78104b9b FL |
3479 | struct in6_addr *gate, unsigned int ifindex, vrf_id_t vrf_id, |
3480 | u_int32_t table_id, safi_t safi) | |
718e3744 | 3481 | { |
3482 | struct route_table *table; | |
3483 | struct route_node *rn; | |
3484 | struct rib *rib; | |
3485 | struct rib *fib = NULL; | |
3486 | struct rib *same = NULL; | |
fa713d9e CF |
3487 | struct nexthop *nexthop, *tnexthop; |
3488 | int recursing; | |
4690c7d7 | 3489 | char buf1[PREFIX2STR_BUFFER]; |
81cce018 | 3490 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 3491 | |
3492 | /* Apply mask. */ | |
3493 | apply_mask_ipv6 (p); | |
3494 | ||
3495 | /* Lookup table. */ | |
ca46a78e | 3496 | table = zebra_vrf_table_with_table_id (AFI_IP6, safi, vrf_id, table_id); |
718e3744 | 3497 | if (! table) |
3498 | return 0; | |
4d38fdb4 | 3499 | |
718e3744 | 3500 | /* Lookup route node. */ |
3501 | rn = route_node_lookup (table, (struct prefix *) p); | |
3502 | if (! rn) | |
3503 | { | |
41ec9222 | 3504 | if (IS_ZEBRA_DEBUG_RIB) |
3505 | zlog_debug ("%u:%s/%d: doesn't exist in rib", | |
3506 | vrf_id, inet_ntop (p->family, &p->prefix, buf1, INET6_ADDRSTRLEN), | |
3507 | p->prefixlen); | |
718e3744 | 3508 | return ZEBRA_ERR_RTNOEXIST; |
3509 | } | |
3510 | ||
3511 | /* Lookup same type route. */ | |
9fd92e3c | 3512 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3513 | { |
6d691129 PJ |
3514 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
3515 | continue; | |
3516 | ||
718e3744 | 3517 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3518 | fib = rib; | |
3519 | ||
ebf1ead0 | 3520 | if (rib->type != type) |
3521 | continue; | |
7c8ff89e DS |
3522 | if (rib->instance != instance) |
3523 | continue; | |
ebf1ead0 | 3524 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 3525 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 3526 | { |
4f1735fd MF |
3527 | if (nexthop->ifindex != ifindex) |
3528 | continue; | |
ebf1ead0 | 3529 | if (rib->refcnt) |
718e3744 | 3530 | { |
ebf1ead0 | 3531 | rib->refcnt--; |
3532 | route_unlock_node (rn); | |
3533 | route_unlock_node (rn); | |
3534 | return 0; | |
718e3744 | 3535 | } |
ebf1ead0 | 3536 | same = rib; |
3537 | break; | |
718e3744 | 3538 | } |
ebf1ead0 | 3539 | /* Make sure that the route found has the same gateway. */ |
fa713d9e CF |
3540 | else |
3541 | { | |
3542 | if (gate == NULL) | |
3543 | { | |
3544 | same = rib; | |
3545 | break; | |
3546 | } | |
3547 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
3548 | if (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
3549 | { | |
3550 | same = rib; | |
3551 | break; | |
3552 | } | |
3553 | if (same) | |
3554 | break; | |
3555 | } | |
718e3744 | 3556 | } |
3557 | ||
3558 | /* If same type of route can't be found and this message is from | |
3559 | kernel. */ | |
3560 | if (! same) | |
3561 | { | |
2037f143 DS |
3562 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
3563 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
3564 | { | |
41ec9222 | 3565 | if (IS_ZEBRA_DEBUG_RIB) |
3566 | zlog_debug ("%u:%s/%d: rn %p, rib %p (type %d) was deleted " | |
3567 | "from kernel, adding", | |
3568 | vrf_id, inet_ntop (p->family, &p->prefix, buf1, INET6_ADDRSTRLEN), | |
3569 | p->prefixlen, rn, fib, fib->type); | |
6baf7bb8 DS |
3570 | if (allow_delete) |
3571 | { | |
3572 | /* Unset flags. */ | |
3573 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
3574 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3575 | ||
3576 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
3577 | } | |
3578 | else | |
3579 | { | |
3580 | /* This means someone else, other than Zebra, has deleted a Zebra | |
3581 | * route from the kernel. We will add it back */ | |
3582 | rib_install_kernel(rn, fib, 0); | |
3583 | } | |
2037f143 | 3584 | } |
718e3744 | 3585 | else |
3586 | { | |
3587 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3588 | { | |
3589 | if (gate) | |
41ec9222 | 3590 | zlog_debug ("%s: vrf %u via %s ifindex %d type %d " |
78104b9b FL |
3591 | "doesn't exist in rib", |
3592 | prefix2str (p, buf1, sizeof(buf1)), vrf_id, | |
81cce018 | 3593 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), |
718e3744 | 3594 | ifindex, |
3595 | type); | |
3596 | else | |
41ec9222 | 3597 | zlog_debug ("%s: vrf %u ifindex %d type %d doesn't exist in rib", |
78104b9b | 3598 | prefix2str (p, buf1, sizeof(buf1)), vrf_id, |
718e3744 | 3599 | ifindex, |
3600 | type); | |
3601 | } | |
3602 | route_unlock_node (rn); | |
3603 | return ZEBRA_ERR_RTNOEXIST; | |
3604 | } | |
3605 | } | |
3606 | ||
718e3744 | 3607 | if (same) |
4d38fdb4 | 3608 | rib_delnode (rn, same); |
3609 | ||
718e3744 | 3610 | route_unlock_node (rn); |
718e3744 | 3611 | return 0; |
3612 | } | |
6b0655a2 | 3613 | |
718e3744 | 3614 | /* Add static route into static route configuration. */ |
3615 | int | |
3616 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
a3d21ef3 DS |
3617 | unsigned int ifindex, const char *ifname, u_char flags, |
3618 | u_short tag, u_char distance, struct zebra_vrf *zvrf) | |
718e3744 | 3619 | { |
3620 | struct route_node *rn; | |
c0551cbb DS |
3621 | struct static_route *si; |
3622 | struct static_route *pp; | |
3623 | struct static_route *cp; | |
526e1728 | 3624 | struct static_route *update = NULL; |
78104b9b | 3625 | struct route_table *stable = zvrf->stable[AFI_IP6][SAFI_UNICAST]; |
718e3744 | 3626 | |
718e3744 | 3627 | if (! stable) |
3628 | return -1; | |
27b47253 PJ |
3629 | |
3630 | if (!gate && | |
ba779241 | 3631 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFINDEX)) |
27b47253 PJ |
3632 | return -1; |
3633 | ||
ba779241 DS |
3634 | if (!ifindex && |
3635 | (type == STATIC_IPV6_GATEWAY_IFINDEX || type == STATIC_IFINDEX)) | |
27b47253 | 3636 | return -1; |
718e3744 | 3637 | |
3638 | /* Lookup static route prefix. */ | |
3639 | rn = route_node_get (stable, p); | |
3640 | ||
3641 | /* Do nothing if there is a same static route. */ | |
3642 | for (si = rn->info; si; si = si->next) | |
3643 | { | |
526e1728 | 3644 | if (type == si->type |
c0551cbb | 3645 | && (! gate || IPV6_ADDR_SAME (gate, &si->addr.ipv6)) |
ba779241 | 3646 | && (! ifindex || ifindex == si->ifindex)) |
718e3744 | 3647 | { |
526e1728 DS |
3648 | if ((distance == si->distance) && (tag == si->tag)) |
3649 | { | |
3650 | route_unlock_node (rn); | |
3651 | return 0; | |
3652 | } | |
3653 | else | |
3654 | update = si; | |
718e3744 | 3655 | } |
3656 | } | |
3657 | ||
526e1728 DS |
3658 | /* Distance or tag changed. */ |
3659 | if (update) | |
b9f1114e | 3660 | static_delete_ipv6 (p, type, gate, ifindex, update->tag, update->distance, zvrf); |
526e1728 | 3661 | |
718e3744 | 3662 | /* Make new static route structure. */ |
c0551cbb | 3663 | si = XCALLOC (MTYPE_STATIC_ROUTE, sizeof (struct static_route)); |
718e3744 | 3664 | |
3665 | si->type = type; | |
3666 | si->distance = distance; | |
81dfcaa2 | 3667 | si->flags = flags; |
0d9551dc | 3668 | si->tag = tag; |
b9f1114e | 3669 | si->vrf_id = zvrf->vrf_id; |
ba779241 | 3670 | si->ifindex = ifindex; |
a3d21ef3 DS |
3671 | if (si->ifindex) |
3672 | strcpy (si->ifname, ifname); | |
718e3744 | 3673 | |
3674 | switch (type) | |
3675 | { | |
3676 | case STATIC_IPV6_GATEWAY: | |
c0551cbb | 3677 | si->addr.ipv6 = *gate; |
718e3744 | 3678 | break; |
ba779241 | 3679 | case STATIC_IPV6_GATEWAY_IFINDEX: |
c0551cbb | 3680 | si->addr.ipv6 = *gate; |
718e3744 | 3681 | break; |
3682 | } | |
3683 | ||
3684 | /* Add new static route information to the tree with sort by | |
3685 | distance value and gateway address. */ | |
3686 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3687 | { | |
3688 | if (si->distance < cp->distance) | |
3689 | break; | |
3690 | if (si->distance > cp->distance) | |
3691 | continue; | |
3692 | } | |
3693 | ||
3694 | /* Make linked list. */ | |
3695 | if (pp) | |
3696 | pp->next = si; | |
3697 | else | |
3698 | rn->info = si; | |
3699 | if (cp) | |
3700 | cp->prev = si; | |
3701 | si->prev = pp; | |
3702 | si->next = cp; | |
3703 | ||
3704 | /* Install into rib. */ | |
bcd548ff | 3705 | static_install_route (AFI_IP6, SAFI_UNICAST, p, si); |
718e3744 | 3706 | |
3707 | return 1; | |
3708 | } | |
3709 | ||
3710 | /* Delete static route from static route configuration. */ | |
3711 | int | |
3712 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
ba779241 | 3713 | unsigned int ifindex, u_short tag, u_char distance, |
b9f1114e | 3714 | struct zebra_vrf *zvrf) |
718e3744 | 3715 | { |
3716 | struct route_node *rn; | |
c0551cbb | 3717 | struct static_route *si; |
718e3744 | 3718 | struct route_table *stable; |
3719 | ||
3720 | /* Lookup table. */ | |
01bb6d57 | 3721 | stable = zebra_vrf_static_table (AFI_IP6, SAFI_UNICAST, zvrf); |
718e3744 | 3722 | if (! stable) |
3723 | return -1; | |
3724 | ||
3725 | /* Lookup static route prefix. */ | |
3726 | rn = route_node_lookup (stable, p); | |
3727 | if (! rn) | |
3728 | return 0; | |
3729 | ||
3730 | /* Find same static route is the tree */ | |
3731 | for (si = rn->info; si; si = si->next) | |
3732 | if (distance == si->distance | |
3733 | && type == si->type | |
c0551cbb | 3734 | && (! gate || IPV6_ADDR_SAME (gate, &si->addr.ipv6)) |
ba779241 | 3735 | && (! ifindex || ifindex == si->ifindex) |
0d9551dc | 3736 | && (! tag || (tag == si->tag))) |
718e3744 | 3737 | break; |
3738 | ||
3739 | /* Can't find static route. */ | |
3740 | if (! si) | |
3741 | { | |
3742 | route_unlock_node (rn); | |
3743 | return 0; | |
3744 | } | |
3745 | ||
3746 | /* Install into rib. */ | |
b8a1effa | 3747 | static_uninstall_route (AFI_IP6, SAFI_UNICAST, p, si); |
718e3744 | 3748 | |
3749 | /* Unlink static route from linked list. */ | |
3750 | if (si->prev) | |
3751 | si->prev->next = si->next; | |
3752 | else | |
3753 | rn->info = si->next; | |
3754 | if (si->next) | |
3755 | si->next->prev = si->prev; | |
3756 | ||
3757 | /* Free static route configuration. */ | |
c0551cbb | 3758 | XFREE (MTYPE_STATIC_ROUTE, si); |
718e3744 | 3759 | |
3760 | return 1; | |
3761 | } | |
6b0655a2 | 3762 | |
1c848137 | 3763 | /* Schedule routes of a particular table (address-family) based on event. */ |
3764 | static void | |
3765 | rib_update_table (struct route_table *table, rib_update_event_t event) | |
b84c7253 | 3766 | { |
3767 | struct route_node *rn; | |
b84c7253 | 3768 | struct rib *rib, *next; |
3769 | ||
1c848137 | 3770 | /* Walk all routes and queue for processing, if appropriate for |
3771 | * the trigger event. | |
3772 | */ | |
3773 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
3774 | { | |
3775 | switch (event) | |
3776 | { | |
3777 | case RIB_UPDATE_IF_CHANGE: | |
3778 | /* Examine all routes that won't get processed by the protocol or | |
3779 | * triggered by nexthop evaluation (NHT). This would be system, | |
3780 | * kernel and certain static routes. Note that NHT will get | |
3781 | * triggered upon an interface event as connected routes always | |
3782 | * get queued for processing. | |
3783 | */ | |
3784 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
3785 | { | |
3786 | if (rib->type == ZEBRA_ROUTE_OSPF || | |
3787 | rib->type == ZEBRA_ROUTE_OSPF6 || | |
3788 | rib->type == ZEBRA_ROUTE_BGP) | |
3789 | continue; /* protocol will handle. */ | |
3790 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
3791 | { | |
3792 | struct nexthop *nh; | |
3793 | for (nh = rib->nexthop; nh; nh = nh->next) | |
3794 | if (!(nh->type == NEXTHOP_TYPE_IPV4 || | |
3795 | nh->type == NEXTHOP_TYPE_IPV6)) | |
3796 | break; | |
3797 | ||
3798 | /* If we only have nexthops to a gateway, NHT will | |
3799 | * take care. | |
3800 | */ | |
3801 | if (nh) | |
44e9909d | 3802 | rib_queue_add (rn); |
1c848137 | 3803 | } |
3804 | else | |
44e9909d | 3805 | rib_queue_add (rn); |
1c848137 | 3806 | } |
3807 | break; | |
b84c7253 | 3808 | |
1c848137 | 3809 | case RIB_UPDATE_RMAP_CHANGE: |
3810 | case RIB_UPDATE_OTHER: | |
3811 | /* Right now, examine all routes. Can restrict to a protocol in | |
3812 | * some cases (TODO). | |
3813 | */ | |
3814 | if (rnode_to_ribs (rn)) | |
44e9909d | 3815 | rib_queue_add (rn); |
1c848137 | 3816 | break; |
3817 | ||
3818 | default: | |
3819 | break; | |
3820 | } | |
3821 | } | |
b84c7253 | 3822 | } |
3823 | ||
718e3744 | 3824 | /* RIB update function. */ |
3825 | void | |
1c848137 | 3826 | rib_update (vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 3827 | { |
718e3744 | 3828 | struct route_table *table; |
1c848137 | 3829 | |
3830 | /* Process routes of interested address-families. */ | |
78104b9b | 3831 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 3832 | if (table) |
1c848137 | 3833 | rib_update_table (table, event); |
718e3744 | 3834 | |
78104b9b | 3835 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 3836 | if (table) |
1c848137 | 3837 | rib_update_table (table, event); |
718e3744 | 3838 | } |
3839 | ||
718e3744 | 3840 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3841 | static void |
718e3744 | 3842 | rib_weed_table (struct route_table *table) |
3843 | { | |
3844 | struct route_node *rn; | |
3845 | struct rib *rib; | |
3846 | struct rib *next; | |
3847 | ||
3848 | if (table) | |
3849 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3850 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3851 | { |
6d691129 PJ |
3852 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3853 | continue; | |
3854 | ||
b21b19c5 | 3855 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3856 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3857 | rib_delnode (rn, rib); |
718e3744 | 3858 | } |
3859 | } | |
3860 | ||
3861 | /* Delete all routes from non main table. */ | |
3862 | void | |
a1ac18c4 | 3863 | rib_weed_tables (void) |
718e3744 | 3864 | { |
78104b9b FL |
3865 | vrf_iter_t iter; |
3866 | struct zebra_vrf *zvrf; | |
3867 | ||
3868 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3869 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3870 | { | |
3871 | rib_weed_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3872 | rib_weed_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3873 | } | |
718e3744 | 3874 | } |
6b0655a2 | 3875 | |
718e3744 | 3876 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3877 | static void |
718e3744 | 3878 | rib_sweep_table (struct route_table *table) |
3879 | { | |
3880 | struct route_node *rn; | |
3881 | struct rib *rib; | |
3882 | struct rib *next; | |
3883 | int ret = 0; | |
3884 | ||
3885 | if (table) | |
3886 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3887 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3888 | { |
6d691129 PJ |
3889 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3890 | continue; | |
3891 | ||
718e3744 | 3892 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3893 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3894 | { | |
3895 | ret = rib_uninstall_kernel (rn, rib); | |
3896 | if (! ret) | |
4d38fdb4 | 3897 | rib_delnode (rn, rib); |
718e3744 | 3898 | } |
3899 | } | |
3900 | } | |
3901 | ||
3902 | /* Sweep all RIB tables. */ | |
3903 | void | |
a1ac18c4 | 3904 | rib_sweep_route (void) |
718e3744 | 3905 | { |
78104b9b FL |
3906 | vrf_iter_t iter; |
3907 | struct zebra_vrf *zvrf; | |
3908 | ||
3909 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3910 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3911 | { | |
3912 | rib_sweep_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3913 | rib_sweep_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3914 | } | |
718e3744 | 3915 | } |
2ea1ab1c VT |
3916 | |
3917 | /* Remove specific by protocol routes from 'table'. */ | |
3918 | static unsigned long | |
7c8ff89e | 3919 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3920 | { |
3921 | struct route_node *rn; | |
3922 | struct rib *rib; | |
3923 | struct rib *next; | |
3924 | unsigned long n = 0; | |
3925 | ||
3926 | if (table) | |
3927 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3928 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3929 | { |
2ea1ab1c VT |
3930 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3931 | continue; | |
7c8ff89e | 3932 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3933 | { |
3934 | rib_delnode (rn, rib); | |
3935 | n++; | |
3936 | } | |
3937 | } | |
3938 | ||
3939 | return n; | |
3940 | } | |
3941 | ||
3942 | /* Remove specific by protocol routes. */ | |
3943 | unsigned long | |
7c8ff89e | 3944 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3945 | { |
78104b9b FL |
3946 | vrf_iter_t iter; |
3947 | struct zebra_vrf *zvrf; | |
3948 | unsigned long cnt = 0; | |
3949 | ||
3950 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3951 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3952 | cnt += rib_score_proto_table (proto, instance, zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3953 | +rib_score_proto_table (proto, instance, zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3954 | ||
3955 | return cnt; | |
2ea1ab1c VT |
3956 | } |
3957 | ||
718e3744 | 3958 | /* Close RIB and clean up kernel routes. */ |
a31c5886 | 3959 | void |
718e3744 | 3960 | rib_close_table (struct route_table *table) |
3961 | { | |
3962 | struct route_node *rn; | |
416ec78d | 3963 | rib_table_info_t *info = table->info; |
718e3744 | 3964 | struct rib *rib; |
3965 | ||
3966 | if (table) | |
3967 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3968 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3969 | { |
9fd92e3c AS |
3970 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3971 | continue; | |
3972 | ||
416ec78d DL |
3973 | if (info->safi == SAFI_UNICAST) |
3974 | zfpm_trigger_update (rn, NULL); | |
5adc2528 | 3975 | |
9fd92e3c AS |
3976 | if (! RIB_SYSTEM_ROUTE (rib)) |
3977 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3978 | } |
718e3744 | 3979 | } |
3980 | ||
3981 | /* Close all RIB tables. */ | |
3982 | void | |
a1ac18c4 | 3983 | rib_close (void) |
718e3744 | 3984 | { |
78104b9b FL |
3985 | vrf_iter_t iter; |
3986 | struct zebra_vrf *zvrf; | |
3987 | struct listnode *node; | |
5c610faf | 3988 | struct interface *ifp; |
6678277c | 3989 | u_int32_t table_id; |
5c610faf | 3990 | |
78104b9b FL |
3991 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) |
3992 | { | |
3993 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3994 | { | |
3995 | rib_close_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3996 | rib_close_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3997 | } | |
3998 | for (ALL_LIST_ELEMENTS_RO (vrf_iter2iflist (iter), node, ifp)) | |
3999 | if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp); | |
4000 | } | |
6678277c DS |
4001 | |
4002 | /* If we do multiple tables per vrf, need to move this to loop above */ | |
4003 | zvrf = vrf_info_lookup (VRF_DEFAULT); | |
4004 | ||
4005 | for (table_id = 0; table_id < ZEBRA_KERNEL_TABLE_MAX; table_id++) | |
4006 | { | |
4007 | if (zvrf->other_table[AFI_IP][table_id]) | |
4008 | rib_close_table (zvrf->other_table[AFI_IP][table_id]); | |
4009 | ||
4010 | if (zvrf->other_table[AFI_IP6][table_id]) | |
4011 | rib_close_table (zvrf->other_table[AFI_IP6][table_id]); | |
4012 | } | |
718e3744 | 4013 | } |
6b0655a2 | 4014 | |
718e3744 | 4015 | /* Routing information base initialize. */ |
4016 | void | |
a1ac18c4 | 4017 | rib_init (void) |
718e3744 | 4018 | { |
4d38fdb4 | 4019 | rib_queue_init (&zebrad); |
718e3744 | 4020 | } |
0915bb0c AS |
4021 | |
4022 | /* | |
4023 | * vrf_id_get_next | |
4024 | * | |
4025 | * Get the first vrf id that is greater than the given vrf id if any. | |
4026 | * | |
4027 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
4028 | */ | |
4029 | static inline int | |
b72ede27 | 4030 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 4031 | { |
b72ede27 FL |
4032 | vrf_iter_t iter = vrf_iterator (vrf_id); |
4033 | struct zebra_vrf *zvrf = vrf_iter2info (iter); | |
4034 | ||
4035 | /* The same one ? Then find out the next. */ | |
4036 | if (zvrf && (zvrf->vrf_id == vrf_id)) | |
4037 | zvrf = vrf_iter2info (vrf_next (iter)); | |
4038 | ||
4039 | if (zvrf) | |
0915bb0c | 4040 | { |
b72ede27 FL |
4041 | *next_id_p = zvrf->vrf_id; |
4042 | return 1; | |
0915bb0c AS |
4043 | } |
4044 | ||
4045 | return 0; | |
4046 | } | |
4047 | ||
4048 | /* | |
4049 | * rib_tables_iter_next | |
4050 | * | |
4051 | * Returns the next table in the iteration. | |
4052 | */ | |
4053 | struct route_table * | |
4054 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
4055 | { | |
4056 | struct route_table *table; | |
4057 | ||
4058 | /* | |
4059 | * Array that helps us go over all AFI/SAFI combinations via one | |
4060 | * index. | |
4061 | */ | |
4062 | static struct { | |
4063 | afi_t afi; | |
4064 | safi_t safi; | |
4065 | } afi_safis[] = { | |
4066 | { AFI_IP, SAFI_UNICAST }, | |
4067 | { AFI_IP, SAFI_MULTICAST }, | |
4068 | { AFI_IP6, SAFI_UNICAST }, | |
4069 | { AFI_IP6, SAFI_MULTICAST }, | |
4070 | }; | |
4071 | ||
4072 | table = NULL; | |
4073 | ||
4074 | switch (iter->state) | |
4075 | { | |
4076 | ||
4077 | case RIB_TABLES_ITER_S_INIT: | |
9c2bf1cf | 4078 | iter->vrf_id = VRF_DEFAULT; |
0915bb0c AS |
4079 | iter->afi_safi_ix = -1; |
4080 | ||
4081 | /* Fall through */ | |
4082 | ||
4083 | case RIB_TABLES_ITER_S_ITERATING: | |
4084 | iter->afi_safi_ix++; | |
4085 | while (1) | |
4086 | { | |
4087 | ||
4088 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
4089 | { | |
b72ede27 | 4090 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
4091 | afi_safis[iter->afi_safi_ix].safi, |
4092 | iter->vrf_id); | |
4093 | if (table) | |
4094 | break; | |
4095 | ||
4096 | iter->afi_safi_ix++; | |
4097 | } | |
4098 | ||
4099 | /* | |
4100 | * Found another table in this vrf. | |
4101 | */ | |
4102 | if (table) | |
4103 | break; | |
4104 | ||
4105 | /* | |
4106 | * Done with all tables in the current vrf, go to the next | |
4107 | * one. | |
4108 | */ | |
4109 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
4110 | break; | |
4111 | ||
4112 | iter->afi_safi_ix = 0; | |
4113 | } | |
4114 | ||
4115 | break; | |
4116 | ||
4117 | case RIB_TABLES_ITER_S_DONE: | |
4118 | return NULL; | |
4119 | } | |
4120 | ||
4121 | if (table) | |
4122 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4123 | else | |
4124 | iter->state = RIB_TABLES_ITER_S_DONE; | |
4125 | ||
4126 | return table; | |
4127 | } | |
b72ede27 | 4128 |