]>
Commit | Line | Data |
---|---|---|
718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
b892f1dd | 24 | #include "if.h" |
718e3744 | 25 | #include "prefix.h" |
26 | #include "table.h" | |
27 | #include "memory.h" | |
28 | #include "str.h" | |
29 | #include "command.h" | |
718e3744 | 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 | |
4623d897 DL |
82 | /* RPF lookup behaviour */ |
83 | static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; | |
84 | ||
6c4f4e6e DL |
85 | |
86 | static void __attribute__((format (printf, 5, 6))) | |
2263a412 DL |
87 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, int priority, |
88 | const char *msgfmt, ...) | |
89 | { | |
35d921cc | 90 | char buf[PREFIX_STRLEN + 8]; |
2263a412 DL |
91 | char msgbuf[512]; |
92 | va_list ap; | |
93 | ||
94 | va_start(ap, msgfmt); | |
95 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
96 | va_end(ap); | |
97 | ||
98 | if (rn) | |
99 | { | |
cb653491 DL |
100 | rib_table_info_t *info = rn->table->info; |
101 | ||
35d921cc TT |
102 | prefix2str(&rn->p, buf, sizeof(buf)); |
103 | if (info->safi == SAFI_MULTICAST) | |
104 | strcat(buf, " (MRIB)"); | |
2263a412 DL |
105 | } |
106 | else | |
107 | { | |
108 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
109 | } | |
110 | ||
111 | zlog (NULL, priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); | |
112 | } | |
113 | ||
114 | #define rnode_debug(node, vrf_id, ...) \ | |
115 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) | |
116 | #define rnode_info(node, ...) \ | |
117 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) | |
118 | ||
7a4bb9c5 DS |
119 | int |
120 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
121 | { | |
8f500a1c RW |
122 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX)) |
123 | return 0; | |
124 | ||
125 | #ifdef linux | |
126 | if ((table_id == RT_TABLE_UNSPEC) || | |
7a4bb9c5 DS |
127 | (table_id == RT_TABLE_LOCAL) || |
128 | (table_id == RT_TABLE_COMPAT)) | |
129 | return 0; | |
8f500a1c RW |
130 | #endif |
131 | ||
132 | return 1; | |
7a4bb9c5 DS |
133 | } |
134 | ||
135 | int | |
136 | is_zebra_main_routing_table(u_int32_t table_id) | |
137 | { | |
138 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
139 | return 1; | |
140 | return 0; | |
141 | } | |
142 | ||
0aabccc0 DD |
143 | int |
144 | zebra_check_addr (struct prefix *p) | |
145 | { | |
146 | if (p->family == AF_INET) | |
147 | { | |
148 | u_int32_t addr; | |
149 | ||
150 | addr = p->u.prefix4.s_addr; | |
151 | addr = ntohl (addr); | |
152 | ||
153 | if (IPV4_NET127 (addr) | |
154 | || IN_CLASSD (addr) | |
155 | || IPV4_LINKLOCAL(addr)) | |
156 | return 0; | |
157 | } | |
0aabccc0 DD |
158 | if (p->family == AF_INET6) |
159 | { | |
160 | if (IN6_IS_ADDR_LOOPBACK (&p->u.prefix6)) | |
161 | return 0; | |
162 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
163 | return 0; | |
164 | } | |
0aabccc0 DD |
165 | return 1; |
166 | } | |
167 | ||
fa713d9e | 168 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 169 | void |
a399694f | 170 | rib_nexthop_add (struct rib *rib, struct nexthop *nexthop) |
fa713d9e | 171 | { |
a399694f | 172 | nexthop_add(&rib->nexthop, nexthop); |
718e3744 | 173 | rib->nexthop_num++; |
174 | } | |
175 | ||
6e26278c | 176 | |
6e26278c DS |
177 | |
178 | /** | |
179 | * copy_nexthop - copy a nexthop to the rib structure. | |
180 | */ | |
181 | void | |
a399694f | 182 | rib_copy_nexthops (struct rib *rib, struct nexthop *nh) |
6e26278c DS |
183 | { |
184 | struct nexthop *nexthop; | |
185 | ||
186 | nexthop = nexthop_new(); | |
187 | nexthop->flags = nh->flags; | |
188 | nexthop->type = nh->type; | |
189 | nexthop->ifindex = nh->ifindex; | |
6e26278c DS |
190 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); |
191 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
a399694f | 192 | rib_nexthop_add(rib, nexthop); |
6e26278c | 193 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) |
a399694f | 194 | copy_nexthops(&nexthop->resolved, nh->resolved); |
6e26278c DS |
195 | } |
196 | ||
718e3744 | 197 | /* Delete specified nexthop from the list. */ |
a1ac18c4 | 198 | static void |
a399694f | 199 | rib_nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
718e3744 | 200 | { |
201 | if (nexthop->next) | |
202 | nexthop->next->prev = nexthop->prev; | |
203 | if (nexthop->prev) | |
204 | nexthop->prev->next = nexthop->next; | |
205 | else | |
206 | rib->nexthop = nexthop->next; | |
207 | rib->nexthop_num--; | |
208 | } | |
209 | ||
fa713d9e | 210 | |
fa713d9e | 211 | |
718e3744 | 212 | struct nexthop * |
b892f1dd | 213 | rib_nexthop_ifindex_add (struct rib *rib, ifindex_t ifindex) |
718e3744 | 214 | { |
215 | struct nexthop *nexthop; | |
216 | ||
a399694f | 217 | nexthop = nexthop_new(); |
718e3744 | 218 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
219 | nexthop->ifindex = ifindex; | |
220 | ||
a399694f | 221 | rib_nexthop_add (rib, nexthop); |
718e3744 | 222 | |
223 | return nexthop; | |
224 | } | |
225 | ||
718e3744 | 226 | struct nexthop * |
a399694f | 227 | rib_nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 228 | { |
229 | struct nexthop *nexthop; | |
230 | ||
a399694f | 231 | nexthop = nexthop_new(); |
718e3744 | 232 | nexthop->type = NEXTHOP_TYPE_IPV4; |
233 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
234 | if (src) |
235 | nexthop->src.ipv4 = *src; | |
718e3744 | 236 | |
a399694f | 237 | rib_nexthop_add (rib, nexthop); |
718e3744 | 238 | |
239 | return nexthop; | |
240 | } | |
241 | ||
26e2ae36 | 242 | struct nexthop * |
a399694f | 243 | rib_nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
b892f1dd | 244 | struct in_addr *src, ifindex_t ifindex) |
718e3744 | 245 | { |
246 | struct nexthop *nexthop; | |
d44ca835 | 247 | struct interface *ifp; |
718e3744 | 248 | |
a399694f | 249 | nexthop = nexthop_new(); |
718e3744 | 250 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
251 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
252 | if (src) |
253 | nexthop->src.ipv4 = *src; | |
718e3744 | 254 | nexthop->ifindex = ifindex; |
d44ca835 | 255 | ifp = if_lookup_by_index (nexthop->ifindex); |
12f6fb97 DS |
256 | /*Pending: need to think if null ifp here is ok during bootup? |
257 | There was a crash because ifp here was coming to be NULL */ | |
258 | if (ifp) | |
d44ca835 DS |
259 | if (connected_is_unnumbered(ifp)) { |
260 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
261 | } | |
718e3744 | 262 | |
a399694f | 263 | rib_nexthop_add (rib, nexthop); |
718e3744 | 264 | |
265 | return nexthop; | |
266 | } | |
267 | ||
718e3744 | 268 | struct nexthop * |
a399694f | 269 | rib_nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) |
718e3744 | 270 | { |
271 | struct nexthop *nexthop; | |
272 | ||
a399694f | 273 | nexthop = nexthop_new(); |
718e3744 | 274 | nexthop->type = NEXTHOP_TYPE_IPV6; |
275 | nexthop->gate.ipv6 = *ipv6; | |
276 | ||
a399694f | 277 | rib_nexthop_add (rib, nexthop); |
718e3744 | 278 | |
279 | return nexthop; | |
280 | } | |
281 | ||
41fc2714 | 282 | struct nexthop * |
a399694f | 283 | rib_nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
b892f1dd | 284 | ifindex_t ifindex) |
718e3744 | 285 | { |
286 | struct nexthop *nexthop; | |
287 | ||
393deb9b | 288 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 289 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
290 | nexthop->gate.ipv6 = *ipv6; | |
291 | nexthop->ifindex = ifindex; | |
292 | ||
a399694f | 293 | rib_nexthop_add (rib, nexthop); |
718e3744 | 294 | |
295 | return nexthop; | |
296 | } | |
718e3744 | 297 | |
595db7f1 | 298 | struct nexthop * |
a399694f | 299 | rib_nexthop_blackhole_add (struct rib *rib) |
595db7f1 | 300 | { |
301 | struct nexthop *nexthop; | |
302 | ||
a399694f | 303 | nexthop = nexthop_new(); |
595db7f1 | 304 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
305 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
306 | ||
a399694f | 307 | rib_nexthop_add (rib, nexthop); |
595db7f1 | 308 | |
309 | return nexthop; | |
310 | } | |
311 | ||
fa713d9e CF |
312 | /* This method checks whether a recursive nexthop has at |
313 | * least one resolved nexthop in the fib. | |
314 | */ | |
315 | int | |
316 | nexthop_has_fib_child(struct nexthop *nexthop) | |
317 | { | |
318 | struct nexthop *nh; | |
319 | ||
320 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
321 | return 0; | |
322 | ||
323 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
324 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
325 | return 1; | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
718e3744 | 330 | /* If force flag is not set, do not modify falgs at all for uninstall |
331 | the route from FIB. */ | |
a1ac18c4 | 332 | static int |
718e3744 | 333 | nexthop_active_ipv4 (struct rib *rib, struct nexthop *nexthop, int set, |
334 | struct route_node *top) | |
335 | { | |
336 | struct prefix_ipv4 p; | |
337 | struct route_table *table; | |
338 | struct route_node *rn; | |
339 | struct rib *match; | |
fa713d9e | 340 | int resolved; |
6e26278c | 341 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 342 | struct nexthop *resolved_hop; |
6e26278c | 343 | int recursing = 0; |
c8a1cb5c | 344 | struct interface *ifp; |
718e3744 | 345 | |
346 | if (nexthop->type == NEXTHOP_TYPE_IPV4) | |
347 | nexthop->ifindex = 0; | |
348 | ||
349 | if (set) | |
fa713d9e CF |
350 | { |
351 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 352 | zebra_deregister_rnh_static_nexthops(rib->vrf_id, nexthop->resolved, top); |
a399694f | 353 | nexthops_free(nexthop->resolved); |
fa713d9e CF |
354 | nexthop->resolved = NULL; |
355 | } | |
718e3744 | 356 | |
6e26278c DS |
357 | /* Skip nexthops that have been filtered out due to route-map */ |
358 | /* The nexthops are specific to this route and so the same */ | |
359 | /* nexthop for a different route may not have this flag set */ | |
360 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
361 | return 0; | |
362 | ||
d44ca835 DS |
363 | /* |
364 | * Check to see if we should trust the passed in information | |
365 | * for UNNUMBERED interfaces as that we won't find the GW | |
366 | * address in the routing table. | |
c8a1cb5c DS |
367 | */ |
368 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
369 | { | |
370 | ifp = if_lookup_by_index (nexthop->ifindex); | |
d44ca835 DS |
371 | if (ifp && connected_is_unnumbered(ifp)) |
372 | { | |
373 | if (if_is_operative(ifp)) | |
374 | return 1; | |
375 | else | |
376 | return 0; | |
377 | } | |
c8a1cb5c DS |
378 | else |
379 | return 0; | |
380 | } | |
381 | ||
718e3744 | 382 | /* Make lookup prefix. */ |
383 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
384 | p.family = AF_INET; | |
385 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
386 | p.prefix = nexthop->gate.ipv4; | |
387 | ||
388 | /* Lookup table. */ | |
78104b9b | 389 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 390 | if (! table) |
391 | return 0; | |
392 | ||
393 | rn = route_node_match (table, (struct prefix *) &p); | |
394 | while (rn) | |
395 | { | |
396 | route_unlock_node (rn); | |
397 | ||
a50c107e | 398 | /* If lookup self prefix return immediately. */ |
718e3744 | 399 | if (rn == top) |
400 | return 0; | |
401 | ||
402 | /* Pick up selected route. */ | |
18ff3edd DS |
403 | /* However, do not resolve over default route unless explicitly allowed. */ |
404 | if (is_default_prefix (&rn->p) && | |
405 | !nh_resolve_via_default (p.family)) | |
406 | return 0; | |
407 | ||
9fd92e3c | 408 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
409 | { |
410 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
411 | continue; | |
633e504d DS |
412 | |
413 | /* if the next hop is imported from another table, skip it */ | |
414 | if (match->type == ZEBRA_ROUTE_TABLE) | |
415 | continue; | |
16814f96 SH |
416 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
417 | break; | |
418 | } | |
718e3744 | 419 | |
420 | /* If there is no selected route or matched route is EGP, go up | |
421 | tree. */ | |
6e26278c | 422 | if (! match) |
718e3744 | 423 | { |
424 | do { | |
425 | rn = rn->parent; | |
426 | } while (rn && rn->info == NULL); | |
427 | if (rn) | |
428 | route_lock_node (rn); | |
429 | } | |
430 | else | |
431 | { | |
48a53dc7 CF |
432 | /* If the longest prefix match for the nexthop yields |
433 | * a blackhole, mark it as inactive. */ | |
434 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
435 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
436 | return 0; | |
437 | ||
718e3744 | 438 | if (match->type == ZEBRA_ROUTE_CONNECT) |
439 | { | |
440 | /* Directly point connected route. */ | |
441 | newhop = match->nexthop; | |
442 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
443 | nexthop->ifindex = newhop->ifindex; | |
444 | ||
445 | return 1; | |
446 | } | |
22afbf94 | 447 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
718e3744 | 448 | { |
fa713d9e | 449 | resolved = 0; |
718e3744 | 450 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
451 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
452 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
453 | { | |
454 | if (set) | |
455 | { | |
456 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 457 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
458 | |
459 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
460 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
461 | /* If the resolving route specifies a gateway, use it */ |
462 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 463 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
c3e6b595 CF |
464 | { |
465 | resolved_hop->type = newhop->type; | |
466 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
467 | ||
468 | if (newhop->ifindex) | |
469 | { | |
470 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
471 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
472 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
473 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
474 | } |
475 | } | |
476 | ||
477 | /* If the resolving route is an interface route, | |
478 | * it means the gateway we are looking up is connected | |
479 | * to that interface. (The actual network is _not_ onlink). | |
480 | * Therefore, the resolved route should have the original | |
481 | * gateway as nexthop as it is directly connected. | |
482 | * | |
483 | * On Linux, we have to set the onlink netlink flag because | |
484 | * otherwise, the kernel won't accept the route. */ | |
3ee39b5b | 485 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
486 | { |
487 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
488 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
489 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
490 | resolved_hop->ifindex = newhop->ifindex; | |
491 | } | |
fa713d9e | 492 | |
a399694f | 493 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
494 | } |
495 | resolved = 1; | |
496 | } | |
497 | return resolved; | |
498 | } | |
499 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
500 | { | |
501 | resolved = 0; | |
502 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
503 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
504 | { | |
505 | if (set) | |
506 | { | |
507 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
508 | ||
509 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
510 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
511 | /* If the resolving route specifies a gateway, use it */ | |
512 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 513 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
6e26278c DS |
514 | { |
515 | resolved_hop->type = newhop->type; | |
516 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
517 | ||
518 | if (newhop->ifindex) | |
519 | { | |
520 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
521 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
522 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
523 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
524 | } |
525 | } | |
526 | ||
527 | /* If the resolving route is an interface route, | |
528 | * it means the gateway we are looking up is connected | |
529 | * to that interface. (The actual network is _not_ onlink). | |
530 | * Therefore, the resolved route should have the original | |
531 | * gateway as nexthop as it is directly connected. | |
532 | * | |
533 | * On Linux, we have to set the onlink netlink flag because | |
534 | * otherwise, the kernel won't accept the route. | |
535 | */ | |
3ee39b5b | 536 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
537 | { |
538 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
539 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
540 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
541 | resolved_hop->ifindex = newhop->ifindex; | |
542 | } | |
543 | ||
a399694f | 544 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 545 | } |
fa713d9e | 546 | resolved = 1; |
718e3744 | 547 | } |
fa713d9e | 548 | return resolved; |
718e3744 | 549 | } |
550 | else | |
551 | { | |
552 | return 0; | |
553 | } | |
554 | } | |
555 | } | |
556 | return 0; | |
557 | } | |
558 | ||
718e3744 | 559 | /* If force flag is not set, do not modify falgs at all for uninstall |
560 | the route from FIB. */ | |
a1ac18c4 | 561 | static int |
718e3744 | 562 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
563 | struct route_node *top) | |
564 | { | |
565 | struct prefix_ipv6 p; | |
566 | struct route_table *table; | |
567 | struct route_node *rn; | |
568 | struct rib *match; | |
fa713d9e | 569 | int resolved; |
6e26278c DS |
570 | struct nexthop *newhop, *tnewhop; |
571 | int recursing = 0; | |
fa713d9e | 572 | struct nexthop *resolved_hop; |
718e3744 | 573 | |
574 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
575 | nexthop->ifindex = 0; | |
576 | ||
577 | if (set) | |
fa713d9e CF |
578 | { |
579 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 580 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, nexthop->resolved, top); |
a399694f | 581 | nexthops_free(nexthop->resolved); |
fa713d9e CF |
582 | nexthop->resolved = NULL; |
583 | } | |
718e3744 | 584 | |
6e26278c DS |
585 | /* Skip nexthops that have been filtered out due to route-map */ |
586 | /* The nexthops are specific to this route and so the same */ | |
587 | /* nexthop for a different route may not have this flag set */ | |
588 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
589 | return 0; | |
590 | ||
718e3744 | 591 | /* Make lookup prefix. */ |
592 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
593 | p.family = AF_INET6; | |
594 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
595 | p.prefix = nexthop->gate.ipv6; | |
596 | ||
597 | /* Lookup table. */ | |
78104b9b | 598 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 599 | if (! table) |
600 | return 0; | |
601 | ||
602 | rn = route_node_match (table, (struct prefix *) &p); | |
603 | while (rn) | |
604 | { | |
605 | route_unlock_node (rn); | |
606 | ||
a50c107e | 607 | /* If lookup self prefix return immediately. */ |
718e3744 | 608 | if (rn == top) |
609 | return 0; | |
610 | ||
611 | /* Pick up selected route. */ | |
18ff3edd DS |
612 | /* However, do not resolve over default route unless explicitly allowed. */ |
613 | if (is_default_prefix (&rn->p) && | |
614 | !nh_resolve_via_default (p.family)) | |
615 | return 0; | |
616 | ||
9fd92e3c | 617 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
618 | { |
619 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
620 | continue; | |
621 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
622 | break; | |
623 | } | |
718e3744 | 624 | |
625 | /* If there is no selected route or matched route is EGP, go up | |
626 | tree. */ | |
6e26278c | 627 | if (! match) |
718e3744 | 628 | { |
629 | do { | |
630 | rn = rn->parent; | |
631 | } while (rn && rn->info == NULL); | |
632 | if (rn) | |
633 | route_lock_node (rn); | |
634 | } | |
635 | else | |
636 | { | |
48a53dc7 CF |
637 | /* If the longest prefix match for the nexthop yields |
638 | * a blackhole, mark it as inactive. */ | |
639 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
640 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
641 | return 0; | |
642 | ||
718e3744 | 643 | if (match->type == ZEBRA_ROUTE_CONNECT) |
644 | { | |
645 | /* Directly point connected route. */ | |
646 | newhop = match->nexthop; | |
647 | ||
648 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
649 | nexthop->ifindex = newhop->ifindex; | |
650 | ||
651 | return 1; | |
652 | } | |
653 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
654 | { | |
fa713d9e | 655 | resolved = 0; |
718e3744 | 656 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
657 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
658 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
659 | { |
660 | if (set) | |
661 | { | |
662 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
663 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
664 | ||
665 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
666 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
667 | /* See nexthop_active_ipv4 for a description how the | |
668 | * resolved nexthop is constructed. */ | |
669 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
3ee39b5b | 670 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
6e26278c DS |
671 | { |
672 | resolved_hop->type = newhop->type; | |
673 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
674 | ||
675 | if (newhop->ifindex) | |
676 | { | |
677 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
678 | resolved_hop->ifindex = newhop->ifindex; | |
679 | } | |
680 | } | |
681 | ||
3ee39b5b | 682 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
683 | { |
684 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
685 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
686 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
687 | resolved_hop->ifindex = newhop->ifindex; | |
688 | } | |
689 | ||
a399694f | 690 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
691 | } |
692 | resolved = 1; | |
693 | } | |
694 | return resolved; | |
695 | } | |
696 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
697 | { | |
698 | resolved = 0; | |
699 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
700 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 701 | { |
702 | if (set) | |
703 | { | |
704 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
705 | |
706 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
707 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
708 | /* See nexthop_active_ipv4 for a description how the |
709 | * resolved nexthop is constructed. */ | |
718e3744 | 710 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
3ee39b5b | 711 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
c3e6b595 CF |
712 | { |
713 | resolved_hop->type = newhop->type; | |
714 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
715 | ||
716 | if (newhop->ifindex) | |
717 | { | |
718 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
719 | resolved_hop->ifindex = newhop->ifindex; | |
720 | } | |
721 | } | |
fa713d9e | 722 | |
3ee39b5b | 723 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
724 | { |
725 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
726 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
727 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
728 | resolved_hop->ifindex = newhop->ifindex; | |
729 | } | |
fa713d9e | 730 | |
a399694f | 731 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 732 | } |
fa713d9e | 733 | resolved = 1; |
718e3744 | 734 | } |
fa713d9e | 735 | return resolved; |
718e3744 | 736 | } |
737 | else | |
738 | { | |
739 | return 0; | |
740 | } | |
741 | } | |
742 | } | |
743 | return 0; | |
744 | } | |
718e3744 | 745 | |
746 | struct rib * | |
33550aa8 DL |
747 | rib_match_ipv4 (struct in_addr addr, safi_t safi, vrf_id_t vrf_id, |
748 | struct route_node **rn_out) | |
718e3744 | 749 | { |
750 | struct prefix_ipv4 p; | |
751 | struct route_table *table; | |
752 | struct route_node *rn; | |
753 | struct rib *match; | |
fa713d9e CF |
754 | struct nexthop *newhop, *tnewhop; |
755 | int recursing; | |
718e3744 | 756 | |
757 | /* Lookup table. */ | |
492dadb2 | 758 | table = zebra_vrf_table (AFI_IP, safi, vrf_id); |
718e3744 | 759 | if (! table) |
760 | return 0; | |
761 | ||
762 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
763 | p.family = AF_INET; | |
764 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
765 | p.prefix = addr; | |
766 | ||
767 | rn = route_node_match (table, (struct prefix *) &p); | |
768 | ||
769 | while (rn) | |
770 | { | |
771 | route_unlock_node (rn); | |
772 | ||
773 | /* Pick up selected route. */ | |
9fd92e3c | 774 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
775 | { |
776 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
777 | continue; | |
778 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
779 | break; | |
780 | } | |
718e3744 | 781 | |
782 | /* If there is no selected route or matched route is EGP, go up | |
783 | tree. */ | |
6e26278c | 784 | if (! match) |
718e3744 | 785 | { |
786 | do { | |
787 | rn = rn->parent; | |
788 | } while (rn && rn->info == NULL); | |
789 | if (rn) | |
790 | route_lock_node (rn); | |
791 | } | |
792 | else | |
793 | { | |
33550aa8 | 794 | if (match->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 795 | { |
33550aa8 | 796 | int found = 0; |
fa713d9e | 797 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 798 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
33550aa8 DL |
799 | { |
800 | found = 1; | |
801 | break; | |
802 | } | |
803 | if (!found) | |
804 | return NULL; | |
718e3744 | 805 | } |
33550aa8 DL |
806 | |
807 | if (rn_out) | |
808 | *rn_out = rn; | |
809 | return match; | |
718e3744 | 810 | } |
811 | } | |
812 | return NULL; | |
813 | } | |
814 | ||
4623d897 DL |
815 | struct rib * |
816 | rib_match_ipv4_multicast (struct in_addr addr, struct route_node **rn_out) | |
817 | { | |
818 | struct rib *rib = NULL, *mrib = NULL, *urib = NULL; | |
819 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
820 | int skip_bgp = 0; /* bool */ | |
821 | ||
822 | switch (ipv4_multicast_mode) | |
823 | { | |
824 | case MCAST_MRIB_ONLY: | |
825 | return rib_match_ipv4 (addr, SAFI_MULTICAST, skip_bgp, rn_out); | |
826 | case MCAST_URIB_ONLY: | |
827 | return rib_match_ipv4 (addr, SAFI_UNICAST, skip_bgp, rn_out); | |
828 | case MCAST_NO_CONFIG: | |
829 | case MCAST_MIX_MRIB_FIRST: | |
830 | rib = mrib = rib_match_ipv4 (addr, SAFI_MULTICAST, skip_bgp, &m_rn); | |
831 | if (!mrib) | |
832 | rib = urib = rib_match_ipv4 (addr, SAFI_UNICAST, skip_bgp, &u_rn); | |
833 | break; | |
834 | case MCAST_MIX_DISTANCE: | |
835 | mrib = rib_match_ipv4 (addr, SAFI_MULTICAST, skip_bgp, &m_rn); | |
836 | urib = rib_match_ipv4 (addr, SAFI_UNICAST, skip_bgp, &u_rn); | |
837 | if (mrib && urib) | |
838 | rib = urib->distance < mrib->distance ? urib : mrib; | |
839 | else if (mrib) | |
840 | rib = mrib; | |
841 | else if (urib) | |
842 | rib = urib; | |
843 | break; | |
844 | case MCAST_MIX_PFXLEN: | |
845 | mrib = rib_match_ipv4 (addr, SAFI_MULTICAST, skip_bgp, &m_rn); | |
846 | urib = rib_match_ipv4 (addr, SAFI_UNICAST, skip_bgp, &u_rn); | |
847 | if (mrib && urib) | |
848 | rib = u_rn->p.prefixlen > m_rn->p.prefixlen ? urib : mrib; | |
849 | else if (mrib) | |
850 | rib = mrib; | |
851 | else if (urib) | |
852 | rib = urib; | |
853 | break; | |
854 | } | |
855 | ||
856 | if (rn_out) | |
857 | *rn_out = (rib == mrib) ? m_rn : u_rn; | |
858 | ||
859 | if (IS_ZEBRA_DEBUG_RIB) | |
860 | { | |
861 | char buf[BUFSIZ]; | |
862 | inet_ntop (AF_INET, &addr, buf, BUFSIZ); | |
863 | ||
864 | zlog_debug("%s: %s: found %s, using %s", | |
865 | __func__, buf, | |
866 | mrib ? (urib ? "MRIB+URIB" : "MRIB") : | |
867 | urib ? "URIB" : "nothing", | |
868 | rib == urib ? "URIB" : rib == mrib ? "MRIB" : "none"); | |
869 | } | |
870 | return rib; | |
871 | } | |
872 | ||
873 | void | |
874 | multicast_mode_ipv4_set (enum multicast_mode mode) | |
875 | { | |
876 | if (IS_ZEBRA_DEBUG_RIB) | |
877 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, mode); | |
878 | ipv4_multicast_mode = mode; | |
879 | } | |
880 | ||
881 | enum multicast_mode | |
882 | multicast_mode_ipv4_get (void) | |
883 | { | |
884 | return ipv4_multicast_mode; | |
885 | } | |
886 | ||
718e3744 | 887 | struct rib * |
78104b9b | 888 | rib_lookup_ipv4 (struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 889 | { |
890 | struct route_table *table; | |
891 | struct route_node *rn; | |
892 | struct rib *match; | |
fa713d9e CF |
893 | struct nexthop *nexthop, *tnexthop; |
894 | int recursing; | |
718e3744 | 895 | |
896 | /* Lookup table. */ | |
78104b9b | 897 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 898 | if (! table) |
899 | return 0; | |
900 | ||
901 | rn = route_node_lookup (table, (struct prefix *) p); | |
902 | ||
903 | /* No route for this prefix. */ | |
904 | if (! rn) | |
905 | return NULL; | |
906 | ||
907 | /* Unlock node. */ | |
908 | route_unlock_node (rn); | |
909 | ||
9fd92e3c | 910 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
911 | { |
912 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
913 | continue; | |
914 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
915 | break; | |
916 | } | |
718e3744 | 917 | |
6e26278c | 918 | if (! match) |
718e3744 | 919 | return NULL; |
920 | ||
921 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
922 | return match; | |
923 | ||
fa713d9e | 924 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 925 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
926 | return match; | |
927 | ||
928 | return NULL; | |
929 | } | |
930 | ||
dc95824a DO |
931 | /* |
932 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
933 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
934 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
935 | * | |
936 | * Return values: | |
937 | * -1: error | |
938 | * 0: exact match found | |
939 | * 1: a match was found with a different gate | |
940 | * 2: connected route found | |
941 | * 3: no matches found | |
942 | */ | |
943 | int | |
78104b9b FL |
944 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate, |
945 | vrf_id_t vrf_id) | |
dc95824a DO |
946 | { |
947 | struct route_table *table; | |
948 | struct route_node *rn; | |
949 | struct rib *match; | |
fa713d9e CF |
950 | struct nexthop *nexthop, *tnexthop; |
951 | int recursing; | |
952 | int nexthops_active; | |
dc95824a DO |
953 | |
954 | /* Lookup table. */ | |
78104b9b | 955 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
956 | if (! table) |
957 | return ZEBRA_RIB_LOOKUP_ERROR; | |
958 | ||
959 | /* Scan the RIB table for exactly matching RIB entry. */ | |
960 | rn = route_node_lookup (table, (struct prefix *) p); | |
961 | ||
962 | /* No route for this prefix. */ | |
963 | if (! rn) | |
964 | return ZEBRA_RIB_NOTFOUND; | |
965 | ||
966 | /* Unlock node. */ | |
967 | route_unlock_node (rn); | |
968 | ||
969 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 970 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
971 | { |
972 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
973 | continue; | |
974 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
975 | break; | |
976 | } | |
dc95824a DO |
977 | |
978 | /* None such found :( */ | |
979 | if (!match) | |
980 | return ZEBRA_RIB_NOTFOUND; | |
981 | ||
982 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
983 | return ZEBRA_RIB_FOUND_CONNECTED; | |
984 | ||
985 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
986 | nexthops_active = 0; |
987 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 988 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 989 | { |
fa713d9e CF |
990 | nexthops_active = 1; |
991 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
992 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 993 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
994 | { |
995 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
996 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
997 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
998 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
999 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1000 | } | |
dc95824a | 1001 | } |
fa713d9e CF |
1002 | |
1003 | if (nexthops_active) | |
1004 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1005 | |
1006 | return ZEBRA_RIB_NOTFOUND; | |
1007 | } | |
1008 | ||
718e3744 | 1009 | struct rib * |
78104b9b | 1010 | rib_match_ipv6 (struct in6_addr *addr, vrf_id_t vrf_id) |
718e3744 | 1011 | { |
1012 | struct prefix_ipv6 p; | |
1013 | struct route_table *table; | |
1014 | struct route_node *rn; | |
1015 | struct rib *match; | |
fa713d9e CF |
1016 | struct nexthop *newhop, *tnewhop; |
1017 | int recursing; | |
718e3744 | 1018 | |
1019 | /* Lookup table. */ | |
78104b9b | 1020 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 1021 | if (! table) |
1022 | return 0; | |
1023 | ||
1024 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
1025 | p.family = AF_INET6; | |
1026 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1027 | IPV6_ADDR_COPY (&p.prefix, addr); | |
1028 | ||
1029 | rn = route_node_match (table, (struct prefix *) &p); | |
1030 | ||
1031 | while (rn) | |
1032 | { | |
1033 | route_unlock_node (rn); | |
1034 | ||
1035 | /* Pick up selected route. */ | |
9fd92e3c | 1036 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
1037 | { |
1038 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
1039 | continue; | |
1040 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
1041 | break; | |
1042 | } | |
718e3744 | 1043 | |
1044 | /* If there is no selected route or matched route is EGP, go up | |
1045 | tree. */ | |
6e26278c | 1046 | if (! match) |
718e3744 | 1047 | { |
1048 | do { | |
1049 | rn = rn->parent; | |
1050 | } while (rn && rn->info == NULL); | |
1051 | if (rn) | |
1052 | route_lock_node (rn); | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
1057 | /* Directly point connected route. */ | |
1058 | return match; | |
1059 | else | |
1060 | { | |
fa713d9e | 1061 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 1062 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
1063 | return match; | |
1064 | return NULL; | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | return NULL; | |
1069 | } | |
718e3744 | 1070 | |
7514fb77 PJ |
1071 | #define RIB_SYSTEM_ROUTE(R) \ |
1072 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1073 | ||
dc95824a DO |
1074 | /* This function verifies reachability of one given nexthop, which can be |
1075 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1076 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1077 | * nexthop->ifindex will be updated appropriately as well. | |
1078 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1079 | * not vice versa. | |
1080 | * | |
1081 | * The return value is the final value of 'ACTIVE' flag. | |
1082 | */ | |
1083 | ||
d02c56cd | 1084 | static unsigned |
718e3744 | 1085 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1086 | struct nexthop *nexthop, int set) | |
1087 | { | |
f3a1732e | 1088 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1089 | struct interface *ifp; |
7514fb77 | 1090 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1091 | int family; |
518f0eb1 | 1092 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1093 | |
7a4bb9c5 DS |
1094 | if (rn->p.family == AF_INET) |
1095 | family = AFI_IP; | |
1096 | else if (rn->p.family == AF_INET6) | |
1097 | family = AFI_IP6; | |
1098 | else | |
1099 | family = 0; | |
718e3744 | 1100 | switch (nexthop->type) |
1101 | { | |
1102 | case NEXTHOP_TYPE_IFINDEX: | |
78104b9b | 1103 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1104 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1105 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1106 | else | |
1107 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1108 | break; | |
718e3744 | 1109 | case NEXTHOP_TYPE_IPV4: |
1110 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1111 | family = AFI_IP; |
718e3744 | 1112 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1113 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1114 | else | |
1115 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1116 | break; | |
718e3744 | 1117 | case NEXTHOP_TYPE_IPV6: |
7514fb77 | 1118 | family = AFI_IP6; |
718e3744 | 1119 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1120 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1121 | else | |
1122 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1123 | break; | |
1124 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 1125 | /* RFC 5549, v4 prefix with v6 NH */ |
1126 | if (rn->p.family != AF_INET) | |
1127 | family = AFI_IP6; | |
718e3744 | 1128 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1129 | { | |
78104b9b | 1130 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1131 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1132 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1133 | else | |
1134 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1135 | } | |
1136 | else | |
1137 | { | |
1138 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1139 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1140 | else | |
1141 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1142 | } | |
1143 | break; | |
595db7f1 | 1144 | case NEXTHOP_TYPE_BLACKHOLE: |
1145 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1146 | break; | |
718e3744 | 1147 | default: |
1148 | break; | |
1149 | } | |
7514fb77 PJ |
1150 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1151 | return 0; | |
1152 | ||
f3a1732e CF |
1153 | /* XXX: What exactly do those checks do? Do we support |
1154 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1155 | if (RIB_SYSTEM_ROUTE(rib) || |
1156 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1157 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1158 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1159 | ||
f3a1732e CF |
1160 | /* The original code didn't determine the family correctly |
1161 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1162 | * from the rib_table_info in those cases. | |
1163 | * Possibly it may be better to use only the rib_table_info | |
1164 | * in every case. | |
1165 | */ | |
1166 | if (!family) | |
1167 | family = info->afi; | |
1168 | ||
c52ef59f | 1169 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1170 | |
ca84c8ef | 1171 | /* It'll get set if required inside */ |
0032dd59 FL |
1172 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->vrf_id, |
1173 | rib->tag); | |
7514fb77 | 1174 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1175 | { |
1176 | if (IS_ZEBRA_DEBUG_RIB) | |
1177 | { | |
1178 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
41ec9222 | 1179 | zlog_debug("%u:%s/%d: Filtering out with NH out %s due to route map", |
3ee39b5b DS |
1180 | rib->vrf_id, buf, rn->p.prefixlen, |
1181 | ifindex2ifname_vrf (nexthop->ifindex, rib->vrf_id)); | |
518f0eb1 DS |
1182 | } |
1183 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1184 | } | |
718e3744 | 1185 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1186 | } | |
1187 | ||
03e232a4 DO |
1188 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1189 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1190 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
1191 | * is flagged with ZEBRA_FLAG_CHANGED. The 4th 'set' argument is | |
1192 | * transparently passed to nexthop_active_check(). | |
1193 | * | |
1194 | * Return value is the new number of active nexthops. | |
1195 | */ | |
1196 | ||
a1ac18c4 | 1197 | static int |
718e3744 | 1198 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1199 | { | |
1200 | struct nexthop *nexthop; | |
c52ef59f | 1201 | union g_addr prev_src; |
b892f1dd PJ |
1202 | unsigned int prev_active, new_active, old_num_nh; |
1203 | ifindex_t prev_index; | |
6e26278c | 1204 | old_num_nh = rib->nexthop_active_num; |
718e3744 | 1205 | |
1206 | rib->nexthop_active_num = 0; | |
1207 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1208 | ||
1209 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1210 | { |
c52ef59f DS |
1211 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1212 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1213 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1214 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1215 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1216 | rib->nexthop_active_num++; | |
c52ef59f | 1217 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1218 | if (prev_active != new_active || |
c52ef59f DS |
1219 | prev_index != nexthop->ifindex || |
1220 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1221 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1222 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1223 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1224 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1225 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c DS |
1226 | { |
1227 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1228 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1229 | } | |
03e232a4 | 1230 | } |
6e26278c DS |
1231 | |
1232 | if (old_num_nh != rib->nexthop_active_num) | |
1233 | SET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1234 | ||
1235 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_CHANGED)) | |
1236 | { | |
1237 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1238 | } | |
1239 | ||
718e3744 | 1240 | return rib->nexthop_active_num; |
1241 | } | |
6baeb988 | 1242 | |
6b0655a2 | 1243 | |
718e3744 | 1244 | |
6ae24471 DS |
1245 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1246 | * is only used for IPv4. | |
1247 | */ | |
3e5c6e00 | 1248 | static int |
6ae24471 | 1249 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1250 | { |
1251 | int ret = 0; | |
fa713d9e | 1252 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1253 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1254 | int recursing; |
718e3744 | 1255 | |
416ec78d DL |
1256 | if (info->safi != SAFI_UNICAST) |
1257 | { | |
1258 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1259 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1260 | return ret; | |
1261 | } | |
1262 | ||
5adc2528 AS |
1263 | /* |
1264 | * Make sure we update the FPM any time we send new information to | |
1265 | * the kernel. | |
1266 | */ | |
1267 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1268 | switch (PREFIX_FAMILY (&rn->p)) |
1269 | { | |
1270 | case AF_INET: | |
6ae24471 DS |
1271 | if (update) |
1272 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1273 | else | |
1274 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1275 | break; |
718e3744 | 1276 | case AF_INET6: |
dccc5225 | 1277 | if (update) |
1278 | ret = kernel_update_ipv6 (&rn->p, rib); | |
1279 | else | |
1280 | ret = kernel_add_ipv6 (&rn->p, rib); | |
718e3744 | 1281 | break; |
718e3744 | 1282 | } |
1283 | ||
3e5c6e00 | 1284 | /* If install succeeds, update FIB flag for nexthops. */ |
1285 | if (!ret) | |
718e3744 | 1286 | { |
fa713d9e | 1287 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1288 | { |
1289 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1290 | continue; | |
1291 | ||
1292 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1293 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1294 | else | |
1295 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1296 | } | |
718e3744 | 1297 | } |
3e5c6e00 | 1298 | |
1299 | return ret; | |
718e3744 | 1300 | } |
1301 | ||
1302 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1303 | static int |
718e3744 | 1304 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1305 | { | |
1306 | int ret = 0; | |
fa713d9e | 1307 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1308 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1309 | int recursing; |
718e3744 | 1310 | |
416ec78d DL |
1311 | if (info->safi != SAFI_UNICAST) |
1312 | { | |
1313 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1314 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1315 | return ret; | |
1316 | } | |
1317 | ||
5adc2528 AS |
1318 | /* |
1319 | * Make sure we update the FPM any time we send new information to | |
1320 | * the kernel. | |
1321 | */ | |
1322 | zfpm_trigger_update (rn, "uninstalling from kernel"); | |
1323 | ||
718e3744 | 1324 | switch (PREFIX_FAMILY (&rn->p)) |
1325 | { | |
1326 | case AF_INET: | |
1327 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1328 | break; | |
718e3744 | 1329 | case AF_INET6: |
1330 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1331 | break; | |
718e3744 | 1332 | } |
1333 | ||
fa713d9e | 1334 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1335 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1336 | ||
1337 | return ret; | |
1338 | } | |
1339 | ||
1340 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1341 | static void |
718e3744 | 1342 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1343 | { | |
416ec78d DL |
1344 | rib_table_info_t *info = rn->table->info; |
1345 | ||
718e3744 | 1346 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
1347 | { | |
416ec78d DL |
1348 | if (info->safi == SAFI_UNICAST) |
1349 | zfpm_trigger_update (rn, "rib_uninstall"); | |
5adc2528 | 1350 | |
718e3744 | 1351 | redistribute_delete (&rn->p, rib); |
1352 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1353 | rib_uninstall_kernel (rn, rib); | |
1354 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1355 | } | |
1356 | } | |
1357 | ||
6d691129 PJ |
1358 | static void rib_unlink (struct route_node *, struct rib *); |
1359 | ||
9fd92e3c AS |
1360 | /* |
1361 | * rib_can_delete_dest | |
1362 | * | |
1363 | * Returns TRUE if the given dest can be deleted from the table. | |
1364 | */ | |
1365 | static int | |
1366 | rib_can_delete_dest (rib_dest_t *dest) | |
1367 | { | |
1368 | if (dest->routes) | |
1369 | { | |
1370 | return 0; | |
1371 | } | |
1372 | ||
5adc2528 AS |
1373 | /* |
1374 | * Don't delete the dest if we have to update the FPM about this | |
1375 | * prefix. | |
1376 | */ | |
1377 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1378 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1379 | return 0; | |
1380 | ||
9fd92e3c AS |
1381 | return 1; |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * rib_gc_dest | |
1386 | * | |
1387 | * Garbage collect the rib dest corresponding to the given route node | |
1388 | * if appropriate. | |
1389 | * | |
1390 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1391 | */ | |
1392 | int | |
1393 | rib_gc_dest (struct route_node *rn) | |
1394 | { | |
1395 | rib_dest_t *dest; | |
41ec9222 | 1396 | struct zebra_vrf *zvrf; |
9fd92e3c AS |
1397 | |
1398 | dest = rib_dest_from_rnode (rn); | |
1399 | if (!dest) | |
1400 | return 0; | |
1401 | ||
1402 | if (!rib_can_delete_dest (dest)) | |
1403 | return 0; | |
1404 | ||
41ec9222 | 1405 | zvrf = rib_dest_vrf (dest); |
2263a412 DL |
1406 | if (IS_ZEBRA_DEBUG_RIB) |
1407 | rnode_debug (rn, zvrf->vrf_id, "removing dest from table"); | |
9fd92e3c AS |
1408 | |
1409 | dest->rnode = NULL; | |
1410 | XFREE (MTYPE_RIB_DEST, dest); | |
1411 | rn->info = NULL; | |
1412 | ||
1413 | /* | |
1414 | * Release the one reference that we keep on the route node. | |
1415 | */ | |
1416 | route_unlock_node (rn); | |
1417 | return 1; | |
1418 | } | |
1419 | ||
3e5c6e00 | 1420 | static void |
1421 | rib_process_add_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1422 | struct rib *select) | |
1423 | { | |
1424 | char buf[INET6_ADDRSTRLEN]; | |
1425 | int installed = 1; | |
1426 | ||
1427 | zfpm_trigger_update (rn, "new route selected"); | |
1428 | ||
1429 | /* Update real nexthop. This may actually determine if nexthop is active or not. */ | |
1430 | if (!nexthop_active_update (rn, select, 1)) | |
1431 | { | |
1432 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); | |
1433 | return; | |
1434 | } | |
1435 | ||
1436 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1437 | if (IS_ZEBRA_DEBUG_RIB) | |
1438 | { | |
1439 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1440 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1441 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1442 | } | |
1443 | ||
1444 | if (!RIB_SYSTEM_ROUTE (select)) | |
1445 | { | |
1446 | if (rib_install_kernel (rn, select, 0)) | |
1447 | { | |
1448 | installed = 0; | |
fb02523b DS |
1449 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1450 | zlog_warn ("%u:%s/%d: Route install failed", | |
1451 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1452 | } |
1453 | } | |
1454 | ||
1455 | /* Update for redistribution. */ | |
1456 | if (installed) | |
1457 | redistribute_update (&rn->p, select, NULL); | |
1458 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); | |
1459 | } | |
1460 | ||
1461 | static void | |
1462 | rib_process_del_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1463 | struct rib *fib) | |
1464 | { | |
1465 | char buf[INET6_ADDRSTRLEN]; | |
1466 | ||
1467 | zfpm_trigger_update (rn, "removing existing route"); | |
1468 | ||
1469 | /* Withdraw redistribute and uninstall from kernel. */ | |
1470 | if (IS_ZEBRA_DEBUG_RIB) | |
1471 | { | |
1472 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1473 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1474 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1475 | } | |
1476 | ||
1477 | redistribute_delete(&rn->p, fib); | |
1478 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1479 | rib_uninstall_kernel (rn, fib); | |
1480 | ||
1481 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1482 | ||
1483 | /* Update nexthop for route, reset changed flag. */ | |
1484 | nexthop_active_update (rn, fib, 1); | |
1485 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); | |
1486 | } | |
1487 | ||
1488 | static void | |
1489 | rib_process_update_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1490 | struct rib *select, struct rib *fib) | |
1491 | { | |
1492 | char buf[INET6_ADDRSTRLEN]; | |
1493 | struct nexthop *nexthop = NULL, *tnexthop; | |
1494 | int recursing; | |
1495 | int nh_active = 0; | |
1496 | int installed = 1; | |
1497 | ||
1498 | if (IS_ZEBRA_DEBUG_RIB) | |
1499 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1500 | ||
1501 | /* | |
1502 | * We have to install or update if a new route has been selected or | |
1503 | * something has changed. | |
1504 | */ | |
1505 | if (select != fib || | |
1506 | CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) | |
1507 | { | |
1508 | zfpm_trigger_update (rn, "updating existing route"); | |
1509 | ||
1510 | /* Update the nexthop; we could determine here that nexthop is inactive. */ | |
1511 | if (nexthop_active_update (rn, select, 1)) | |
1512 | nh_active = 1; | |
1513 | ||
1514 | /* If nexthop is active, install the selected route, if appropriate. If | |
1515 | * the install succeeds, cleanup flags for prior route, if different from | |
1516 | * newly selected. | |
1517 | */ | |
1518 | if (nh_active) | |
1519 | { | |
1520 | if (IS_ZEBRA_DEBUG_RIB) | |
1521 | { | |
1522 | if (select != fib) | |
1523 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1524 | "old %p (type %d)", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1525 | rn, select, select->type, fib, fib->type); | |
1526 | else | |
1527 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1528 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1529 | } | |
1530 | /* Non-system route should be installed. */ | |
1531 | if (!RIB_SYSTEM_ROUTE (select)) | |
1532 | { | |
1533 | if (rib_install_kernel (rn, select, 1)) | |
1534 | { | |
1535 | installed = 0; | |
fb02523b DS |
1536 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1537 | zlog_warn ("%u:%s/%d: Route install failed", | |
1538 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1539 | } |
1540 | } | |
1541 | ||
1542 | /* If install succeeded or system route, cleanup flags for prior route. */ | |
1543 | if (installed && select != fib) | |
1544 | { | |
1545 | if (RIB_SYSTEM_ROUTE(select)) | |
1546 | { | |
1547 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1548 | rib_uninstall_kernel (rn, fib); | |
1549 | } | |
1550 | else | |
1551 | { | |
1552 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1553 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1554 | } | |
1555 | ||
1556 | } | |
1557 | ||
1558 | /* Update for redistribution. */ | |
1559 | if (installed) | |
1560 | { | |
1561 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1562 | redistribute_update (&rn->p, select, (select == fib) ? NULL : fib); | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | /* | |
1567 | * If nexthop for selected route is not active or install failed, we | |
1568 | * may need to uninstall and delete for redistribution. | |
1569 | */ | |
1570 | if (!nh_active || !installed) | |
1571 | { | |
1572 | struct rib *del; | |
1573 | ||
1574 | if (IS_ZEBRA_DEBUG_RIB) | |
1575 | { | |
1576 | if (select != fib) | |
1577 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1578 | "old %p (type %d) - %s", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1579 | rn, select, select->type, fib, fib->type, | |
1580 | nh_active ? "install failed" : "nexthop inactive"); | |
1581 | else | |
1582 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) - %s", | |
1583 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type, | |
1584 | nh_active ? "install failed" : "nexthop inactive"); | |
1585 | } | |
1586 | ||
1587 | del = (select == fib) ? select : fib; | |
1588 | ||
1589 | redistribute_delete(&rn->p, del); | |
1590 | ||
1591 | if (!RIB_SYSTEM_ROUTE (del)) | |
1592 | rib_uninstall_kernel (rn, del); | |
1593 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1594 | } | |
1595 | } | |
1596 | else | |
1597 | { | |
1598 | /* | |
1599 | * Same route selected; check if in the FIB and if not, re-install. This | |
1600 | * is housekeeping code to deal with race conditions in kernel with linux | |
1601 | * netlink reporting interface up before IPv4 or IPv6 protocol is ready | |
1602 | * to add routes. | |
1603 | */ | |
1604 | if (!RIB_SYSTEM_ROUTE (select)) | |
1605 | { | |
1606 | int in_fib = 0; | |
1607 | ||
1608 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) | |
1609 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1610 | { | |
1611 | in_fib = 1; | |
1612 | break; | |
1613 | } | |
1614 | if (!in_fib) | |
1615 | rib_install_kernel (rn, select, 0); | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | /* Update prior route. */ | |
1620 | if (select != fib) | |
1621 | { | |
1622 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1623 | ||
1624 | /* Set real nexthop. */ | |
1625 | nexthop_active_update (rn, fib, 1); | |
1626 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); | |
1627 | } | |
1628 | ||
1629 | /* Clear changed flag. */ | |
1630 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); | |
1631 | } | |
1632 | ||
718e3744 | 1633 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1634 | static void |
1635 | rib_process (struct route_node *rn) | |
718e3744 | 1636 | { |
1637 | struct rib *rib; | |
1638 | struct rib *next; | |
1639 | struct rib *fib = NULL; | |
1640 | struct rib *select = NULL; | |
6d691129 | 1641 | struct rib *del = NULL; |
f304cb48 | 1642 | char buf[INET6_ADDRSTRLEN]; |
41ec9222 | 1643 | rib_dest_t *dest; |
1644 | struct zebra_vrf *zvrf = NULL; | |
58255d34 | 1645 | vrf_id_t vrf_id = VRF_UNKNOWN; |
7498d58d | 1646 | rib_table_info_t *info; |
41ec9222 | 1647 | |
4d38fdb4 | 1648 | assert (rn); |
7498d58d | 1649 | info = rn->table->info; |
4d38fdb4 | 1650 | |
41ec9222 | 1651 | dest = rib_dest_from_rnode (rn); |
1652 | if (dest) | |
1653 | { | |
1654 | zvrf = rib_dest_vrf (dest); | |
1655 | vrf_id = zvrf->vrf_id; | |
1656 | } | |
1657 | ||
1658 | if (IS_ZEBRA_DEBUG_RIB) | |
f304cb48 | 1659 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1660 | |
41ec9222 | 1661 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1662 | zlog_debug ("%u:%s/%d: Processing rn %p", vrf_id, buf, rn->p.prefixlen, rn); | |
1663 | ||
9fd92e3c | 1664 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1665 | { |
41ec9222 | 1666 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1667 | zlog_debug ("%u:%s/%d: Examine rib %p (type %d) status %x flags %x " | |
1668 | "dist %d metric %d", | |
1669 | vrf_id, buf, rn->p.prefixlen, rib, rib->type, rib->status, | |
1670 | rib->flags, rib->distance, rib->metric); | |
1671 | ||
6e26278c DS |
1672 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1673 | ||
718e3744 | 1674 | /* Currently installed rib. */ |
1675 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1676 | { |
1677 | assert (fib == NULL); | |
1678 | fib = rib; | |
1679 | } | |
ca657c65 | 1680 | |
6d691129 PJ |
1681 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1682 | * which we need to do do further work with below. | |
1683 | */ | |
1684 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1685 | { | |
1686 | if (rib != fib) | |
1687 | { | |
1688 | if (IS_ZEBRA_DEBUG_RIB) | |
6c4f4e6e DL |
1689 | rnode_debug (rn, vrf_id, "rn %p, removing rib %p", |
1690 | (void *)rn, (void *)rib); | |
9fd92e3c | 1691 | rib_unlink (rn, rib); |
6d691129 PJ |
1692 | } |
1693 | else | |
1694 | del = rib; | |
1695 | ||
1696 | continue; | |
1697 | } | |
4d38fdb4 | 1698 | |
718e3744 | 1699 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1700 | /* This first call to nexthop_active_update is merely to determine if |
1701 | * there's any change to nexthops associated with this RIB entry. Now, | |
1702 | * rib_process() can be invoked due to an external event such as link | |
1703 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1704 | * a decision has already been made that the NHs have changed. So, no | |
1705 | * need to invoke a potentially expensive call again. Further, since | |
1706 | * the change might be in a recursive NH which is not caught in | |
1707 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1708 | * recursive NHs. | |
6e26278c | 1709 | */ |
ca657c65 | 1710 | if (!CHECK_FLAG(rib->flags, ZEBRA_FLAG_CHANGED) && |
f857321e DW |
1711 | ! nexthop_active_update (rn, rib, 0)) |
1712 | { | |
1713 | if (rib->type == ZEBRA_ROUTE_TABLE) | |
1714 | { | |
1715 | /* This entry was denied by the 'ip protocol table' route-map, we | |
1716 | * need to delete it */ | |
1717 | if (rib != fib) | |
1718 | { | |
1719 | if (IS_ZEBRA_DEBUG_RIB) | |
1720 | zlog_debug ("%s: %s/%d: imported via import-table but denied " | |
1721 | "by the ip protocol table route-map", | |
1722 | __func__, buf, rn->p.prefixlen); | |
1723 | rib_unlink (rn, rib); | |
1724 | } | |
1725 | else | |
1726 | del = rib; | |
1727 | } | |
1728 | ||
1729 | continue; | |
1730 | } | |
718e3744 | 1731 | |
7498d58d B |
1732 | if (info->safi == SAFI_MULTICAST) |
1733 | continue; | |
1734 | ||
f857321e | 1735 | /* Infinite distance. */ |
718e3744 | 1736 | if (rib->distance == DISTANCE_INFINITY) |
8733ba72 DS |
1737 | { |
1738 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1739 | continue; | |
1740 | } | |
718e3744 | 1741 | |
af887b51 | 1742 | /* Newly selected rib, the common case. */ |
1743 | if (!select) | |
1744 | { | |
1745 | select = rib; | |
1746 | continue; | |
1747 | } | |
1748 | ||
1749 | /* filter route selection in following order: | |
af887b51 | 1750 | * - connected beats other types |
a8d9c1f9 | 1751 | * - lower distance beats higher |
af887b51 | 1752 | * - lower metric beats higher for equal distance |
1753 | * - last, hence oldest, route wins tie break. | |
1754 | */ | |
a1038a15 | 1755 | |
1756 | /* Connected routes. Pick the last connected | |
1757 | * route of the set of lowest metric connected routes. | |
1758 | */ | |
a8d9c1f9 | 1759 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1760 | { | |
a1038a15 | 1761 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1762 | || rib->metric <= select->metric) |
8733ba72 DS |
1763 | { |
1764 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1765 | select = rib; | |
1766 | } | |
1767 | else | |
1768 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
a1038a15 | 1769 | continue; |
a8d9c1f9 | 1770 | } |
1771 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
8733ba72 DS |
1772 | { |
1773 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1774 | continue; | |
1775 | } | |
a8d9c1f9 | 1776 | |
1777 | /* higher distance loses */ | |
1778 | if (rib->distance > select->distance) | |
8733ba72 DS |
1779 | { |
1780 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_CHANGED); | |
1781 | continue; | |
1782 | } | |
a8d9c1f9 | 1783 | |
1784 | /* lower wins */ | |
1785 | if (rib->distance < select->distance) | |
1786 | { | |
8733ba72 | 1787 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
af887b51 | 1788 | select = rib; |
a8d9c1f9 | 1789 | continue; |
1790 | } | |
1791 | ||
1792 | /* metric tie-breaks equal distance */ | |
1793 | if (rib->metric <= select->metric) | |
8733ba72 DS |
1794 | { |
1795 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); | |
1796 | select = rib; | |
1797 | } | |
9fd92e3c | 1798 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1799 | |
1800 | /* After the cycle is finished, the following pointers will be set: | |
1801 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1802 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1803 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1804 | * rib --- NULL | |
1805 | */ | |
41ec9222 | 1806 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1807 | zlog_debug ("%u:%s/%d: After processing: select %p fib %p del %p", | |
1808 | vrf_id, buf, rn->p.prefixlen, select, fib, del); | |
dc95824a DO |
1809 | |
1810 | /* Same RIB entry is selected. Update FIB and finish. */ | |
3e5c6e00 | 1811 | if (select && select == fib) |
1812 | rib_process_update_route (zvrf, rn, select, select); | |
1813 | else if (select && fib) | |
1814 | rib_process_update_route (zvrf, rn, select, fib); | |
1815 | else if (select) | |
1816 | rib_process_add_route (zvrf, rn, select); | |
1817 | else if (fib) | |
1818 | rib_process_del_route (zvrf, rn, fib); | |
1819 | ||
1820 | #if 0 | |
718e3744 | 1821 | if (select && select == fib) |
1822 | { | |
2263a412 DL |
1823 | if (IS_ZEBRA_DEBUG_RIB) |
1824 | rnode_debug (rn, vrf_id, "Updating existing route, select %p, fib %p", | |
6c4f4e6e | 1825 | (void *)select, (void *)fib); |
718e3744 | 1826 | if (CHECK_FLAG (select->flags, ZEBRA_FLAG_CHANGED)) |
4d38fdb4 | 1827 | { |
416ec78d DL |
1828 | if (info->safi == SAFI_UNICAST) |
1829 | zfpm_trigger_update (rn, "updating existing route"); | |
5adc2528 | 1830 | |
4d38fdb4 | 1831 | /* Set real nexthop. */ |
6e26278c DS |
1832 | /* Need to check if any NHs are active to clear the |
1833 | * the selected flag | |
1834 | */ | |
1835 | if (nexthop_active_update (rn, select, 1)) | |
1836 | { | |
41ec9222 | 1837 | if (IS_ZEBRA_DEBUG_RIB) |
1838 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1839 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
dccc5225 | 1840 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1841 | { |
dccc5225 | 1842 | /* Clear FIB flag if performing a replace, will get set again |
1843 | * as part of install. | |
1844 | */ | |
6ae24471 DS |
1845 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) |
1846 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
dccc5225 | 1847 | rib_install_kernel (rn, select, 1); |
6ae24471 | 1848 | } |
5048fe14 | 1849 | |
1850 | /* assuming that the receiver knows how to dedup */ | |
c41fc67b | 1851 | redistribute_update (&rn->p, select, NULL); |
6e26278c DS |
1852 | } |
1853 | else | |
1854 | { | |
41ec9222 | 1855 | if (IS_ZEBRA_DEBUG_RIB) |
1856 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1857 | "- nexthop inactive", | |
1858 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1859 | ||
5048fe14 | 1860 | /* Withdraw unreachable redistribute route */ |
1861 | redistribute_delete(&rn->p, select); | |
1862 | ||
dccc5225 | 1863 | /* Do the uninstall here, if not done earlier. */ |
1864 | if (! RIB_SYSTEM_ROUTE (select)) | |
6ae24471 | 1865 | rib_uninstall_kernel (rn, select); |
6e26278c DS |
1866 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1867 | } | |
ca657c65 | 1868 | UNSET_FLAG (select->flags, ZEBRA_FLAG_CHANGED); |
6e26278c | 1869 | } |
d753e9ee | 1870 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1871 | { |
1872 | /* Housekeeping code to deal with | |
1873 | race conditions in kernel with linux | |
1874 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1875 | is ready to add routes. | |
1876 | This makes sure the routes are IN the kernel. | |
1877 | */ | |
1878 | ||
fa713d9e | 1879 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1880 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1881 | { |
a3aaf5b0 DO |
1882 | installed = 1; |
1883 | break; | |
4d38fdb4 | 1884 | } |
1885 | if (! installed) | |
6ae24471 | 1886 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1887 | } |
6d691129 | 1888 | goto end; |
718e3744 | 1889 | } |
1890 | ||
dc95824a DO |
1891 | /* At this point we either haven't found the best RIB entry or it is |
1892 | * different from what we currently intend to flag with SELECTED. In both | |
1893 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1894 | */ | |
718e3744 | 1895 | if (fib) |
1896 | { | |
2263a412 | 1897 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 1898 | rnode_debug (rn, vrf_id, "Removing existing route, fib %p", (void *)fib); |
2263a412 | 1899 | |
416ec78d DL |
1900 | if (info->safi == SAFI_UNICAST) |
1901 | zfpm_trigger_update (rn, "removing existing route"); | |
5adc2528 | 1902 | |
dccc5225 | 1903 | /* If there's no route to replace this with, withdraw redistribute and |
1904 | * uninstall from kernel. | |
1905 | */ | |
5048fe14 | 1906 | if (!select) |
6ae24471 | 1907 | { |
41ec9222 | 1908 | if (IS_ZEBRA_DEBUG_RIB) |
1909 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1910 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1911 | ||
dccc5225 | 1912 | redistribute_delete(&rn->p, fib); |
1913 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1914 | rib_uninstall_kernel (rn, fib); | |
6ae24471 | 1915 | } |
dccc5225 | 1916 | |
718e3744 | 1917 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1918 | ||
1919 | /* Set real nexthop. */ | |
1920 | nexthop_active_update (rn, fib, 1); | |
ca657c65 | 1921 | UNSET_FLAG(fib->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1922 | } |
1923 | ||
dc95824a DO |
1924 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1925 | * tell, that if a new winner exists, FIB is still not updated with this | |
1926 | * data, but ready to be. | |
1927 | */ | |
718e3744 | 1928 | if (select) |
1929 | { | |
2263a412 | 1930 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 1931 | rnode_debug (rn, "Adding route, select %p", (void *)select); |
2263a412 | 1932 | |
416ec78d DL |
1933 | if (info->safi == SAFI_UNICAST) |
1934 | zfpm_trigger_update (rn, "new route selected"); | |
5adc2528 | 1935 | |
718e3744 | 1936 | /* Set real nexthop. */ |
6e26278c DS |
1937 | if (nexthop_active_update (rn, select, 1)) |
1938 | { | |
41ec9222 | 1939 | if (IS_ZEBRA_DEBUG_RIB) |
1940 | { | |
1941 | if (fib) | |
1942 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1943 | "old %p (type %d)", vrf_id, buf, rn->p.prefixlen, rn, | |
1944 | select, select->type, fib, fib->type); | |
1945 | else | |
1946 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1947 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1948 | } | |
1949 | ||
dccc5225 | 1950 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1951 | { |
dccc5225 | 1952 | /* Clear FIB flag if performing a replace, will get set again |
1953 | * as part of install. | |
1954 | */ | |
1955 | if (fib) | |
1956 | { | |
1957 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1958 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1959 | } | |
1960 | rib_install_kernel (rn, select, fib? 1 : 0); | |
6ae24471 | 1961 | } |
0b560feb | 1962 | else |
1963 | { | |
1964 | /* Uninstall prior route here, if needed. */ | |
1965 | if (fib && !RIB_SYSTEM_ROUTE (fib)) | |
1966 | rib_uninstall_kernel (rn, fib); | |
1967 | } | |
dccc5225 | 1968 | |
6e26278c | 1969 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
5048fe14 | 1970 | /* Unconditionally announce, this part is exercised by new routes */ |
c41fc67b | 1971 | /* If we cannot add, for example route added is learnt by the */ |
1972 | /* protocol we're trying to redistribute to, delete the redist */ | |
1973 | /* This is notified by setting the is_update to 1 */ | |
1974 | redistribute_update (&rn->p, select, fib); | |
6e26278c | 1975 | } |
6ae24471 DS |
1976 | else |
1977 | { | |
41ec9222 | 1978 | /* Uninstall prior route here and do redist delete, if needed. */ |
a219b295 | 1979 | if (fib) |
41ec9222 | 1980 | { |
1981 | if (IS_ZEBRA_DEBUG_RIB) | |
1982 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1983 | "- nexthop inactive", | |
1984 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1985 | ||
1986 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1987 | rib_uninstall_kernel (rn, fib); | |
1988 | redistribute_delete(&rn->p, fib); | |
1989 | } | |
6ae24471 | 1990 | } |
ca657c65 | 1991 | UNSET_FLAG(select->flags, ZEBRA_FLAG_CHANGED); |
718e3744 | 1992 | } |
3e5c6e00 | 1993 | #endif |
4d38fdb4 | 1994 | |
6d691129 PJ |
1995 | /* FIB route was removed, should be deleted */ |
1996 | if (del) | |
1997 | { | |
1998 | if (IS_ZEBRA_DEBUG_RIB) | |
6c4f4e6e | 1999 | rnode_debug (rn, vrf_id, "Deleting fib %p, rn %p", (void *)del, (void *)rn); |
6d691129 PJ |
2000 | rib_unlink (rn, del); |
2001 | } | |
4d38fdb4 | 2002 | |
9fd92e3c AS |
2003 | /* |
2004 | * Check if the dest can be deleted now. | |
2005 | */ | |
2006 | rib_gc_dest (rn); | |
e96f9203 DO |
2007 | } |
2008 | ||
5110a0c6 SH |
2009 | /* Take a list of route_node structs and return 1, if there was a record |
2010 | * picked from it and processed by rib_process(). Don't process more, | |
2011 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 2012 | */ |
ef9b113e | 2013 | static unsigned int |
e96f9203 DO |
2014 | process_subq (struct list * subq, u_char qindex) |
2015 | { | |
5110a0c6 | 2016 | struct listnode *lnode = listhead (subq); |
e96f9203 | 2017 | struct route_node *rnode; |
41ec9222 | 2018 | char buf[INET6_ADDRSTRLEN]; |
2019 | rib_dest_t *dest; | |
2020 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 SH |
2021 | |
2022 | if (!lnode) | |
e96f9203 | 2023 | return 0; |
5110a0c6 | 2024 | |
e96f9203 | 2025 | rnode = listgetdata (lnode); |
41ec9222 | 2026 | dest = rib_dest_from_rnode (rnode); |
2027 | if (dest) | |
2028 | zvrf = rib_dest_vrf (dest); | |
2029 | ||
e96f9203 | 2030 | rib_process (rnode); |
5110a0c6 | 2031 | |
41ec9222 | 2032 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2033 | { | |
2034 | inet_ntop (rnode->p.family, &rnode->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
2035 | zlog_debug ("%u:%s/%d: rn %p dequeued from sub-queue %u", | |
2036 | zvrf ? zvrf->vrf_id : 0, buf, rnode->p.prefixlen, rnode, qindex); | |
2037 | } | |
2038 | ||
9fd92e3c AS |
2039 | if (rnode->info) |
2040 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
2041 | ||
67b9467f | 2042 | #if 0 |
5110a0c6 SH |
2043 | else |
2044 | { | |
2045 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
2046 | __func__, rnode, rnode->lock); | |
2047 | zlog_backtrace(LOG_DEBUG); | |
2048 | } | |
67b9467f | 2049 | #endif |
e96f9203 DO |
2050 | route_unlock_node (rnode); |
2051 | list_delete_node (subq, lnode); | |
2052 | return 1; | |
2053 | } | |
2054 | ||
fb018d25 DS |
2055 | /* |
2056 | * All meta queues have been processed. Trigger next-hop evaluation. | |
2057 | */ | |
2058 | static void | |
2059 | meta_queue_process_complete (struct work_queue *dummy) | |
2060 | { | |
9ec6b0bb | 2061 | vrf_iter_t iter; |
2062 | struct zebra_vrf *zvrf; | |
2063 | ||
2064 | /* Evaluate nexthops for those VRFs which underwent route processing. This | |
2065 | * should limit the evaluation to the necessary VRFs in most common | |
2066 | * situations. | |
2067 | */ | |
2068 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
2069 | { | |
2070 | if (((zvrf = vrf_iter2info (iter)) != NULL) && | |
2071 | (zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
2072 | { | |
2073 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
2074 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); | |
2075 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
2076 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); | |
2077 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
2078 | } | |
2079 | } | |
fb018d25 DS |
2080 | } |
2081 | ||
e96f9203 DO |
2082 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
2083 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
2084 | * is pointed to the meta queue structure. | |
2085 | */ | |
2086 | static wq_item_status | |
2087 | meta_queue_process (struct work_queue *dummy, void *data) | |
2088 | { | |
2089 | struct meta_queue * mq = data; | |
5110a0c6 SH |
2090 | unsigned i; |
2091 | ||
e96f9203 DO |
2092 | for (i = 0; i < MQ_SIZE; i++) |
2093 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
2094 | { |
2095 | mq->size--; | |
2096 | break; | |
2097 | } | |
e96f9203 DO |
2098 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
2099 | } | |
2100 | ||
9fd92e3c AS |
2101 | /* |
2102 | * Map from rib types to queue type (priority) in meta queue | |
2103 | */ | |
5110a0c6 SH |
2104 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
2105 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
2106 | [ZEBRA_ROUTE_KERNEL] = 0, | |
2107 | [ZEBRA_ROUTE_CONNECT] = 0, | |
2108 | [ZEBRA_ROUTE_STATIC] = 1, | |
2109 | [ZEBRA_ROUTE_RIP] = 2, | |
2110 | [ZEBRA_ROUTE_RIPNG] = 2, | |
2111 | [ZEBRA_ROUTE_OSPF] = 2, | |
2112 | [ZEBRA_ROUTE_OSPF6] = 2, | |
2113 | [ZEBRA_ROUTE_ISIS] = 2, | |
2114 | [ZEBRA_ROUTE_BGP] = 3, | |
2115 | [ZEBRA_ROUTE_HSLS] = 4, | |
7a4bb9c5 | 2116 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
2117 | }; |
2118 | ||
2119 | /* Look into the RN and queue it into one or more priority queues, | |
2120 | * increasing the size for each data push done. | |
e96f9203 | 2121 | */ |
ef9b113e SH |
2122 | static void |
2123 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 2124 | { |
e96f9203 | 2125 | struct rib *rib; |
5110a0c6 | 2126 | |
9fd92e3c | 2127 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 2128 | { |
5110a0c6 | 2129 | u_char qindex = meta_queue_map[rib->type]; |
9ec6b0bb | 2130 | struct zebra_vrf *zvrf; |
5110a0c6 SH |
2131 | |
2132 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
2133 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
2134 | RIB_ROUTE_QUEUED (qindex))) | |
2263a412 DL |
2135 | { |
2136 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2137 | rnode_debug (rn, rib->vrf_id, "rn %p is already queued in sub-queue %u", | |
6c4f4e6e | 2138 | (void *)rn, qindex); |
2263a412 DL |
2139 | continue; |
2140 | } | |
5110a0c6 | 2141 | |
9fd92e3c | 2142 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
2143 | listnode_add (mq->subq[qindex], rn); |
2144 | route_lock_node (rn); | |
2145 | mq->size++; | |
2146 | ||
41ec9222 | 2147 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2148 | rnode_debug (rn, rib->vrf_id, "queued rn %p into sub-queue %u", |
6c4f4e6e | 2149 | (void *)rn, qindex); |
9ec6b0bb | 2150 | |
2151 | zvrf = zebra_vrf_lookup (rib->vrf_id); | |
2152 | if (zvrf) | |
2153 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
e96f9203 | 2154 | } |
4d38fdb4 | 2155 | } |
2156 | ||
6d691129 | 2157 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 2158 | void |
44e9909d | 2159 | rib_queue_add (struct route_node *rn) |
4d38fdb4 | 2160 | { |
44e9909d | 2161 | assert (rn); |
4d38fdb4 | 2162 | |
fc328ac9 | 2163 | /* Pointless to queue a route_node with no RIB entries to add or remove */ |
9fd92e3c | 2164 | if (!rnode_to_ribs (rn)) |
6d691129 | 2165 | { |
fc328ac9 | 2166 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
6c4f4e6e | 2167 | __func__, (void *)rn, rn->lock); |
fc328ac9 SV |
2168 | zlog_backtrace(LOG_DEBUG); |
2169 | return; | |
2170 | } | |
2171 | ||
44e9909d | 2172 | if (zebrad.ribq == NULL) |
fc328ac9 SV |
2173 | { |
2174 | zlog_err ("%s: work_queue does not exist!", __func__); | |
2175 | return; | |
4d38fdb4 | 2176 | } |
4d38fdb4 | 2177 | |
cc2dd928 SH |
2178 | /* |
2179 | * The RIB queue should normally be either empty or holding the only | |
2180 | * work_queue_item element. In the latter case this element would | |
2181 | * hold a pointer to the meta queue structure, which must be used to | |
2182 | * actually queue the route nodes to process. So create the MQ | |
2183 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
2184 | * This semantics was introduced after 0.99.9 release. |
2185 | */ | |
44e9909d DS |
2186 | if (!zebrad.ribq->items->count) |
2187 | work_queue_add (zebrad.ribq, zebrad.mq); | |
e96f9203 | 2188 | |
44e9909d | 2189 | rib_meta_queue_add (zebrad.mq, rn); |
fc328ac9 | 2190 | |
fc328ac9 | 2191 | return; |
4d38fdb4 | 2192 | } |
2193 | ||
5110a0c6 SH |
2194 | /* Create new meta queue. |
2195 | A destructor function doesn't seem to be necessary here. | |
2196 | */ | |
ef9b113e SH |
2197 | static struct meta_queue * |
2198 | meta_queue_new (void) | |
e96f9203 DO |
2199 | { |
2200 | struct meta_queue *new; | |
5110a0c6 SH |
2201 | unsigned i; |
2202 | ||
2203 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
2204 | assert(new); | |
e96f9203 | 2205 | |
e96f9203 | 2206 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
2207 | { |
2208 | new->subq[i] = list_new (); | |
2209 | assert(new->subq[i]); | |
2210 | } | |
2211 | ||
e96f9203 DO |
2212 | return new; |
2213 | } | |
2214 | ||
4d38fdb4 | 2215 | /* initialise zebra rib work queue */ |
a1ac18c4 | 2216 | static void |
4d38fdb4 | 2217 | rib_queue_init (struct zebra_t *zebra) |
2218 | { | |
fc328ac9 SV |
2219 | assert (zebra); |
2220 | ||
4d38fdb4 | 2221 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 2222 | "route_node processing"))) |
4d38fdb4 | 2223 | { |
6d691129 | 2224 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 2225 | return; |
2226 | } | |
2227 | ||
2228 | /* fill in the work queue spec */ | |
e96f9203 | 2229 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2230 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2231 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2232 | /* XXX: TODO: These should be runtime configurable via vty */ |
2233 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2234 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2235 | |
e96f9203 | 2236 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2237 | { |
e96f9203 | 2238 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2239 | return; |
2240 | } | |
2241 | return; | |
718e3744 | 2242 | } |
2243 | ||
6d691129 PJ |
2244 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2245 | * | |
2246 | * The queue length is bounded by the maximal size of the routing table, | |
2247 | * as a route_node will not be requeued, if already queued. | |
2248 | * | |
3c0755dc | 2249 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
bcd548ff | 2250 | * state, or static_install_route (when an existing RIB is updated) |
3c0755dc PJ |
2251 | * and then submit route_node to queue for best-path selection later. |
2252 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2253 | * |
2254 | * Deleted RIBs are reaped during best-path selection. | |
2255 | * | |
2256 | * rib_addnode | |
2257 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2258 | * |-------->| | best RIB, if required |
2259 | * | | | |
2260 | * static_install->|->rib_addqueue...... -> rib_process | |
2261 | * | | | |
2262 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2263 | * |-> set RIB_ENTRY_REMOVE | |
2264 | * rib_delnode (RIB freed) | |
2265 | * | |
9fd92e3c AS |
2266 | * The 'info' pointer of a route_node points to a rib_dest_t |
2267 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2268 | * dest is created on-demand by rib_link() and is kept around at least | |
2269 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2270 | * |
2271 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2272 | * | |
2273 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2274 | * - dest attached to route_node: |
2275 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2276 | * - route_node processing queue |
2277 | * - managed by: rib_addqueue, rib_process. | |
2278 | * | |
2279 | */ | |
2280 | ||
718e3744 | 2281 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2282 | static void |
2bf26d41 | 2283 | rib_link (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2284 | { |
2285 | struct rib *head; | |
9fd92e3c | 2286 | rib_dest_t *dest; |
7a4bb9c5 | 2287 | afi_t afi; |
8902474b | 2288 | const char *rmap_name; |
9fd92e3c | 2289 | |
4d38fdb4 | 2290 | assert (rib && rn); |
2291 | ||
9fd92e3c AS |
2292 | dest = rib_dest_from_rnode (rn); |
2293 | if (!dest) | |
6d691129 | 2294 | { |
41ec9222 | 2295 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2296 | rnode_debug (rn, rib->vrf_id, "rn %p adding dest", rn); |
9fd92e3c AS |
2297 | |
2298 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2299 | route_lock_node (rn); /* rn route table reference */ | |
2300 | rn->info = dest; | |
2301 | dest->rnode = rn; | |
2302 | } | |
2303 | ||
2304 | head = dest->routes; | |
2305 | if (head) | |
2306 | { | |
6d691129 | 2307 | head->prev = rib; |
6d691129 | 2308 | } |
718e3744 | 2309 | rib->next = head; |
9fd92e3c | 2310 | dest->routes = rib; |
7a4bb9c5 | 2311 | |
12f6fb97 DS |
2312 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2313 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2314 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
8902474b DS |
2315 | { |
2316 | rmap_name = zebra_get_import_table_route_map (afi, rib->table); | |
2317 | zebra_add_import_table_entry(rn, rib, rmap_name); | |
2318 | } | |
7a4bb9c5 | 2319 | else |
12f6fb97 | 2320 | if (process) |
44e9909d | 2321 | rib_queue_add (rn); |
718e3744 | 2322 | } |
2323 | ||
a1ac18c4 | 2324 | static void |
2bf26d41 | 2325 | rib_addnode (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2326 | { |
6d691129 PJ |
2327 | /* RIB node has been un-removed before route-node is processed. |
2328 | * route_node must hence already be on the queue for processing.. | |
2329 | */ | |
2330 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2331 | { | |
2263a412 | 2332 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2333 | rnode_debug (rn, rib->vrf_id, "rn %p, un-removed rib %p", (void *)rn, (void *)rib); |
2263a412 | 2334 | |
6d691129 PJ |
2335 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2336 | return; | |
2337 | } | |
2bf26d41 | 2338 | rib_link (rn, rib, process); |
6d691129 PJ |
2339 | } |
2340 | ||
9fd92e3c AS |
2341 | /* |
2342 | * rib_unlink | |
2343 | * | |
2344 | * Detach a rib structure from a route_node. | |
2345 | * | |
2346 | * Note that a call to rib_unlink() should be followed by a call to | |
2347 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2348 | * longer required to be deleted. | |
2349 | */ | |
6d691129 PJ |
2350 | static void |
2351 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2352 | { | |
9fd92e3c | 2353 | rib_dest_t *dest; |
6d691129 | 2354 | |
4d38fdb4 | 2355 | assert (rn && rib); |
6d691129 | 2356 | |
2263a412 | 2357 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2358 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p", (void *)rn, (void *)rib); |
2263a412 | 2359 | |
9fd92e3c AS |
2360 | dest = rib_dest_from_rnode (rn); |
2361 | ||
718e3744 | 2362 | if (rib->next) |
2363 | rib->next->prev = rib->prev; | |
6d691129 | 2364 | |
718e3744 | 2365 | if (rib->prev) |
2366 | rib->prev->next = rib->next; | |
2367 | else | |
6d691129 | 2368 | { |
9fd92e3c | 2369 | dest->routes = rib->next; |
6d691129 PJ |
2370 | } |
2371 | ||
2372 | /* free RIB and nexthops */ | |
d82ae0de | 2373 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, rib->nexthop, rn); |
a399694f | 2374 | nexthops_free(rib->nexthop); |
6d691129 PJ |
2375 | XFREE (MTYPE_RIB, rib); |
2376 | ||
6d691129 PJ |
2377 | } |
2378 | ||
2379 | static void | |
2380 | rib_delnode (struct route_node *rn, struct rib *rib) | |
2381 | { | |
7a4bb9c5 DS |
2382 | afi_t afi; |
2383 | ||
2263a412 | 2384 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2385 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p, removing", (void *)rn, (void *)rib); |
6d691129 | 2386 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 | 2387 | |
12f6fb97 DS |
2388 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2389 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2390 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
7a4bb9c5 | 2391 | { |
12f6fb97 | 2392 | zebra_del_import_table_entry(rn, rib); |
7a4bb9c5 | 2393 | /* Just clean up if non main table */ |
41ec9222 | 2394 | if (IS_ZEBRA_DEBUG_RIB) |
2395 | { | |
2396 | char buf[INET6_ADDRSTRLEN]; | |
2397 | if (IS_ZEBRA_DEBUG_RIB) | |
2398 | { | |
2399 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
2400 | zlog_debug ("%u:%s/%d: Freeing route rn %p, rib %p (type %d)", | |
2401 | rib->vrf_id, buf, rn->p.prefixlen, rn, rib, rib->type); | |
2402 | } | |
2403 | } | |
2404 | ||
7a4bb9c5 DS |
2405 | rib_unlink(rn, rib); |
2406 | } | |
12f6fb97 DS |
2407 | else |
2408 | { | |
44e9909d | 2409 | rib_queue_add (rn); |
12f6fb97 | 2410 | } |
718e3744 | 2411 | } |
2412 | ||
2413 | int | |
7c8ff89e | 2414 | rib_add_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
7514fb77 | 2415 | struct in_addr *gate, struct in_addr *src, |
b892f1dd | 2416 | ifindex_t ifindex, vrf_id_t vrf_id, u_int32_t table_id, |
cddf391b | 2417 | u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 2418 | { |
2419 | struct rib *rib; | |
2420 | struct rib *same = NULL; | |
2421 | struct route_table *table; | |
2422 | struct route_node *rn; | |
2423 | struct nexthop *nexthop; | |
2424 | ||
2425 | /* Lookup table. */ | |
ca46a78e | 2426 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, vrf_id, table_id); |
718e3744 | 2427 | if (! table) |
2428 | return 0; | |
2429 | ||
2430 | /* Make it sure prefixlen is applied to the prefix. */ | |
2431 | apply_mask_ipv4 (p); | |
2432 | ||
2433 | /* Set default distance by route type. */ | |
2434 | if (distance == 0) | |
2435 | { | |
837d16cc | 2436 | if ((unsigned)type >= array_size(route_info)) |
7052f228 DL |
2437 | distance = 150; |
2438 | else | |
2439 | distance = route_info[type].distance; | |
718e3744 | 2440 | |
2441 | /* iBGP distance is 200. */ | |
2442 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2443 | distance = 200; | |
2444 | } | |
2445 | ||
2446 | /* Lookup route node.*/ | |
2447 | rn = route_node_get (table, (struct prefix *) p); | |
2448 | ||
2449 | /* If same type of route are installed, treat it as a implicit | |
2450 | withdraw. */ | |
9fd92e3c | 2451 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2452 | { |
6d691129 PJ |
2453 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2454 | continue; | |
2455 | ||
ebf1ead0 | 2456 | if (rib->type != type) |
2457 | continue; | |
7c8ff89e DS |
2458 | if (rib->instance != instance) |
2459 | continue; | |
7a4bb9c5 | 2460 | |
ebf1ead0 | 2461 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2462 | { |
2463 | same = rib; | |
2464 | break; | |
2465 | } | |
ebf1ead0 | 2466 | /* Duplicate connected route comes in. */ |
2467 | else if ((nexthop = rib->nexthop) && | |
2468 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
6d691129 PJ |
2469 | nexthop->ifindex == ifindex && |
2470 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2471 | { |
2472 | rib->refcnt++; | |
2473 | return 0 ; | |
2474 | } | |
718e3744 | 2475 | } |
2476 | ||
2477 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2478 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
718e3744 | 2479 | rib->type = type; |
7c8ff89e | 2480 | rib->instance = instance; |
718e3744 | 2481 | rib->distance = distance; |
2482 | rib->flags = flags; | |
2483 | rib->metric = metric; | |
7a4bb9c5 | 2484 | rib->table = table_id; |
78104b9b | 2485 | rib->vrf_id = vrf_id; |
718e3744 | 2486 | rib->nexthop_num = 0; |
2487 | rib->uptime = time (NULL); | |
2488 | ||
2489 | /* Nexthop settings. */ | |
2490 | if (gate) | |
2491 | { | |
2492 | if (ifindex) | |
a399694f | 2493 | rib_nexthop_ipv4_ifindex_add (rib, gate, src, ifindex); |
718e3744 | 2494 | else |
a399694f | 2495 | rib_nexthop_ipv4_add (rib, gate, src); |
718e3744 | 2496 | } |
2497 | else | |
a399694f | 2498 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 2499 | |
2500 | /* If this route is kernel route, set FIB flag to the route. */ | |
2501 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2502 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2503 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2504 | ||
2505 | /* Link new rib to node.*/ | |
dc95824a | 2506 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 2507 | { |
2508 | char buf[INET6_ADDRSTRLEN]; | |
2509 | if (IS_ZEBRA_DEBUG_RIB) | |
2510 | { | |
2511 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
2512 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
2513 | "existing %p", | |
6c4f4e6e | 2514 | vrf_id, buf, p->prefixlen, (void *)rn, (void *)rib, rib->type, (void *)same); |
41ec9222 | 2515 | } |
2516 | ||
2517 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2518 | rib_dump ((struct prefix *)p, rib); | |
2519 | } | |
2bf26d41 | 2520 | rib_addnode (rn, rib, 1); |
4d38fdb4 | 2521 | |
718e3744 | 2522 | /* Free implicit route.*/ |
2523 | if (same) | |
4d38fdb4 | 2524 | rib_delnode (rn, same); |
2525 | ||
2526 | route_unlock_node (rn); | |
718e3744 | 2527 | return 0; |
2528 | } | |
2529 | ||
dc95824a DO |
2530 | /* This function dumps the contents of a given RIB entry into |
2531 | * standard debug log. Calling function name and IP prefix in | |
2532 | * question are passed as 1st and 2nd arguments. | |
2533 | */ | |
2534 | ||
f7bf4153 DL |
2535 | void _rib_dump (const char * func, |
2536 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2537 | { |
f7bf4153 | 2538 | const struct prefix *p = pp.p; |
35d921cc | 2539 | char straddr[PREFIX_STRLEN]; |
fa713d9e CF |
2540 | struct nexthop *nexthop, *tnexthop; |
2541 | int recursing; | |
dc95824a | 2542 | |
6c4f4e6e | 2543 | zlog_debug ("%s: dumping RIB entry %p for %s vrf %u", func, (const void *)rib, |
78104b9b | 2544 | prefix2str(pp, straddr, sizeof(straddr)), rib->vrf_id); |
dc95824a DO |
2545 | zlog_debug |
2546 | ( | |
7c8ff89e | 2547 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2548 | func, |
2549 | rib->refcnt, | |
d02c56cd | 2550 | (unsigned long) rib->uptime, |
dc95824a | 2551 | rib->type, |
7c8ff89e | 2552 | rib->instance, |
dc95824a DO |
2553 | rib->table |
2554 | ); | |
2555 | zlog_debug | |
2556 | ( | |
2557 | "%s: metric == %u, distance == %u, flags == %u, status == %u", | |
2558 | func, | |
2559 | rib->metric, | |
2560 | rib->distance, | |
2561 | rib->flags, | |
2562 | rib->status | |
2563 | ); | |
2564 | zlog_debug | |
2565 | ( | |
2566 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2567 | func, | |
2568 | rib->nexthop_num, | |
2569 | rib->nexthop_active_num, | |
2570 | rib->nexthop_fib_num | |
2571 | ); | |
fed643f4 | 2572 | |
fa713d9e CF |
2573 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2574 | { | |
fed643f4 | 2575 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2576 | zlog_debug |
2577 | ( | |
2578 | "%s: %s %s with flags %s%s%s", | |
2579 | func, | |
2580 | (recursing ? " NH" : "NH"), | |
2581 | straddr, | |
2582 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2583 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2584 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2585 | ); | |
2586 | } | |
dc95824a DO |
2587 | zlog_debug ("%s: dump complete", func); |
2588 | } | |
2589 | ||
2590 | /* This is an exported helper to rtm_read() to dump the strange | |
2591 | * RIB entry found by rib_lookup_ipv4_route() | |
2592 | */ | |
2593 | ||
12f6fb97 | 2594 | void rib_lookup_and_dump (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
dc95824a DO |
2595 | { |
2596 | struct route_table *table; | |
2597 | struct route_node *rn; | |
2598 | struct rib *rib; | |
2599 | char prefix_buf[INET_ADDRSTRLEN]; | |
2600 | ||
2601 | /* Lookup table. */ | |
12f6fb97 | 2602 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
2603 | if (! table) |
2604 | { | |
b72ede27 | 2605 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2606 | return; |
2607 | } | |
2608 | ||
dc95824a DO |
2609 | /* Scan the RIB table for exactly matching RIB entry. */ |
2610 | rn = route_node_lookup (table, (struct prefix *) p); | |
2611 | ||
2612 | /* No route for this prefix. */ | |
2613 | if (! rn) | |
2614 | { | |
35d921cc TT |
2615 | zlog_debug ("%s: lookup failed for %s", __func__, |
2616 | prefix2str((struct prefix*) p, prefix_buf, sizeof(prefix_buf))); | |
dc95824a DO |
2617 | return; |
2618 | } | |
2619 | ||
2620 | /* Unlock node. */ | |
2621 | route_unlock_node (rn); | |
2622 | ||
2623 | /* let's go */ | |
9fd92e3c | 2624 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2625 | { |
2626 | zlog_debug | |
2627 | ( | |
2628 | "%s: rn %p, rib %p: %s, %s", | |
2629 | __func__, | |
6c4f4e6e DL |
2630 | (void *)rn, |
2631 | (void *)rib, | |
dc95824a DO |
2632 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), |
2633 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2634 | ); | |
f7bf4153 | 2635 | rib_dump (p, rib); |
dc95824a DO |
2636 | } |
2637 | } | |
2638 | ||
20e5ff0a DO |
2639 | /* Check if requested address assignment will fail due to another |
2640 | * route being installed by zebra in FIB already. Take necessary | |
2641 | * actions, if needed: remove such a route from FIB and deSELECT | |
2642 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2643 | */ | |
12f6fb97 | 2644 | void rib_lookup_and_pushup (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
20e5ff0a DO |
2645 | { |
2646 | struct route_table *table; | |
2647 | struct route_node *rn; | |
2648 | struct rib *rib; | |
2649 | unsigned changed = 0; | |
2650 | ||
12f6fb97 | 2651 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id))) |
20e5ff0a | 2652 | { |
b72ede27 | 2653 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2654 | return; |
2655 | } | |
2656 | ||
2657 | /* No matches would be the simplest case. */ | |
2658 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2659 | return; | |
2660 | ||
2661 | /* Unlock node. */ | |
2662 | route_unlock_node (rn); | |
2663 | ||
2664 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2665 | * the RN into RIBQ head. If the routing message about the new connected | |
2666 | * route (generated by the IP address we are going to assign very soon) | |
2667 | * comes before the RIBQ is processed, the new RIB entry will join | |
2668 | * RIBQ record already on head. This is necessary for proper revalidation | |
2669 | * of the rest of the RIB. | |
2670 | */ | |
9fd92e3c | 2671 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2672 | { |
2673 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2674 | ! RIB_SYSTEM_ROUTE (rib)) | |
2675 | { | |
2676 | changed = 1; | |
2677 | if (IS_ZEBRA_DEBUG_RIB) | |
2678 | { | |
35d921cc TT |
2679 | char buf[PREFIX_STRLEN]; |
2680 | zlog_debug ("%u:%s: freeing way for connected prefix", | |
2681 | rib->vrf_id, prefix2str(&rn->p, buf, sizeof(buf))); | |
f7bf4153 | 2682 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2683 | } |
2684 | rib_uninstall (rn, rib); | |
2685 | } | |
2686 | } | |
2687 | if (changed) | |
44e9909d | 2688 | rib_queue_add (rn); |
20e5ff0a DO |
2689 | } |
2690 | ||
718e3744 | 2691 | int |
cddf391b | 2692 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2693 | { |
2694 | struct route_table *table; | |
2695 | struct route_node *rn; | |
2696 | struct rib *same; | |
2697 | struct nexthop *nexthop; | |
04b02fda | 2698 | int ret = 0; |
4d38fdb4 | 2699 | |
718e3744 | 2700 | /* Lookup table. */ |
ca46a78e | 2701 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, rib->vrf_id, rib->table); |
718e3744 | 2702 | if (! table) |
2703 | return 0; | |
cddf391b | 2704 | |
718e3744 | 2705 | /* Make it sure prefixlen is applied to the prefix. */ |
2706 | apply_mask_ipv4 (p); | |
2707 | ||
2708 | /* Set default distance by route type. */ | |
2709 | if (rib->distance == 0) | |
2710 | { | |
2711 | rib->distance = route_info[rib->type].distance; | |
2712 | ||
2713 | /* iBGP distance is 200. */ | |
2714 | if (rib->type == ZEBRA_ROUTE_BGP | |
2715 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2716 | rib->distance = 200; | |
2717 | } | |
2718 | ||
2719 | /* Lookup route node.*/ | |
2720 | rn = route_node_get (table, (struct prefix *) p); | |
2721 | ||
2722 | /* If same type of route are installed, treat it as a implicit | |
2723 | withdraw. */ | |
9fd92e3c | 2724 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2725 | { |
0b8c4f1d | 2726 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2727 | continue; |
2728 | ||
7c8ff89e DS |
2729 | if (same->type == rib->type && same->instance == rib->instance |
2730 | && same->table == rib->table | |
718e3744 | 2731 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2732 | break; |
718e3744 | 2733 | } |
4d38fdb4 | 2734 | |
718e3744 | 2735 | /* If this route is kernel route, set FIB flag to the route. */ |
2736 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2737 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2738 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2739 | ||
2740 | /* Link new rib to node.*/ | |
41ec9222 | 2741 | if (IS_ZEBRA_DEBUG_RIB) |
2742 | { | |
2743 | char buf[INET6_ADDRSTRLEN]; | |
2744 | if (IS_ZEBRA_DEBUG_RIB) | |
2745 | { | |
2746 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
2747 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
2748 | "existing %p", | |
6c4f4e6e DL |
2749 | rib->vrf_id, buf, p->prefixlen, (void *)rn, |
2750 | (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2751 | } |
2752 | ||
2753 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2754 | rib_dump ((struct prefix *)p, rib); | |
2755 | } | |
2bf26d41 | 2756 | rib_addnode (rn, rib, 1); |
04b02fda | 2757 | ret = 1; |
718e3744 | 2758 | |
718e3744 | 2759 | /* Free implicit route.*/ |
2760 | if (same) | |
dc95824a | 2761 | { |
41ec9222 | 2762 | rib_delnode (rn, same); |
2763 | ret = -1; | |
dc95824a | 2764 | } |
4d38fdb4 | 2765 | |
2766 | route_unlock_node (rn); | |
04b02fda | 2767 | return ret; |
718e3744 | 2768 | } |
2769 | ||
ebf1ead0 | 2770 | /* XXX factor with rib_delete_ipv6 */ |
718e3744 | 2771 | int |
7c8ff89e | 2772 | rib_delete_ipv4 (int type, u_short instance, int flags, struct prefix_ipv4 *p, |
b892f1dd | 2773 | struct in_addr *gate, ifindex_t ifindex, vrf_id_t vrf_id, |
7a4bb9c5 | 2774 | u_int32_t table_id, safi_t safi) |
718e3744 | 2775 | { |
2776 | struct route_table *table; | |
2777 | struct route_node *rn; | |
2778 | struct rib *rib; | |
2779 | struct rib *fib = NULL; | |
2780 | struct rib *same = NULL; | |
fa713d9e CF |
2781 | struct nexthop *nexthop, *tnexthop; |
2782 | int recursing; | |
35d921cc | 2783 | char buf1[PREFIX_STRLEN]; |
41ec9222 | 2784 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 2785 | |
2786 | /* Lookup table. */ | |
ca46a78e | 2787 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, vrf_id, table_id); |
718e3744 | 2788 | if (! table) |
2789 | return 0; | |
2790 | ||
2791 | /* Apply mask. */ | |
2792 | apply_mask_ipv4 (p); | |
2793 | ||
2794 | /* Lookup route node. */ | |
2795 | rn = route_node_lookup (table, (struct prefix *) p); | |
2796 | if (! rn) | |
2797 | { | |
41ec9222 | 2798 | if (IS_ZEBRA_DEBUG_RIB) |
35d921cc TT |
2799 | zlog_debug ("%u:%s: doesn't exist in rib", |
2800 | vrf_id, prefix2str (p, buf1, sizeof(buf1))); | |
718e3744 | 2801 | return ZEBRA_ERR_RTNOEXIST; |
2802 | } | |
2803 | ||
2804 | /* Lookup same type route. */ | |
9fd92e3c | 2805 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2806 | { |
6d691129 PJ |
2807 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2808 | continue; | |
2809 | ||
718e3744 | 2810 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2811 | fib = rib; | |
2812 | ||
ebf1ead0 | 2813 | if (rib->type != type) |
2814 | continue; | |
7c8ff89e DS |
2815 | if (rib->instance != instance) |
2816 | continue; | |
ebf1ead0 | 2817 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2818 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2819 | { |
4f1735fd MF |
2820 | if (nexthop->ifindex != ifindex) |
2821 | continue; | |
ebf1ead0 | 2822 | if (rib->refcnt) |
718e3744 | 2823 | { |
ebf1ead0 | 2824 | rib->refcnt--; |
2825 | route_unlock_node (rn); | |
2826 | route_unlock_node (rn); | |
2827 | return 0; | |
718e3744 | 2828 | } |
ebf1ead0 | 2829 | same = rib; |
2830 | break; | |
718e3744 | 2831 | } |
ebf1ead0 | 2832 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2833 | else |
5ec90d28 | 2834 | { |
fa713d9e CF |
2835 | if (gate == NULL) |
2836 | { | |
2837 | same = rib; | |
2838 | break; | |
2839 | } | |
2840 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
2841 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate)) | |
2842 | { | |
2843 | same = rib; | |
2844 | break; | |
2845 | } | |
2846 | if (same) | |
2847 | break; | |
2848 | } | |
718e3744 | 2849 | } |
718e3744 | 2850 | /* If same type of route can't be found and this message is from |
2851 | kernel. */ | |
2852 | if (! same) | |
2853 | { | |
2037f143 DS |
2854 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2855 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2856 | { | |
41ec9222 | 2857 | if (IS_ZEBRA_DEBUG_RIB) |
2037f143 | 2858 | { |
41ec9222 | 2859 | zlog_debug ("%u:%s/%d: rn %p, rib %p (type %d) was deleted " |
2860 | "from kernel, adding", | |
2861 | vrf_id, inet_ntop (p->family, &p->prefix, buf1, INET6_ADDRSTRLEN), | |
2862 | p->prefixlen, rn, fib, fib->type); | |
2037f143 | 2863 | } |
6baf7bb8 DS |
2864 | if (allow_delete) |
2865 | { | |
2866 | /* Unset flags. */ | |
2867 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2868 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2869 | ||
2870 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2871 | } | |
2872 | else | |
2873 | { | |
2874 | /* This means someone else, other than Zebra, has deleted | |
2875 | * a Zebra router from the kernel. We will add it back */ | |
2876 | rib_install_kernel(rn, fib, 0); | |
2877 | } | |
2037f143 | 2878 | } |
718e3744 | 2879 | else |
2880 | { | |
41ec9222 | 2881 | if (IS_ZEBRA_DEBUG_RIB) |
718e3744 | 2882 | { |
2883 | if (gate) | |
41ec9222 | 2884 | zlog_debug ("%u:%s: via %s ifindex %d type %d " |
78104b9b | 2885 | "doesn't exist in rib", |
35d921cc TT |
2886 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
2887 | inet_ntop (AF_INET, gate, buf2, INET_ADDRSTRLEN), | |
2888 | ifindex, | |
2889 | type); | |
718e3744 | 2890 | else |
41ec9222 | 2891 | zlog_debug ("%u:%s: ifindex %d type %d doesn't exist in rib", |
35d921cc TT |
2892 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
2893 | ifindex, | |
2894 | type); | |
718e3744 | 2895 | } |
2896 | route_unlock_node (rn); | |
2897 | return ZEBRA_ERR_RTNOEXIST; | |
2898 | } | |
2899 | } | |
4d38fdb4 | 2900 | |
718e3744 | 2901 | if (same) |
4d38fdb4 | 2902 | rib_delnode (rn, same); |
2903 | ||
718e3744 | 2904 | route_unlock_node (rn); |
718e3744 | 2905 | return 0; |
2906 | } | |
6b0655a2 | 2907 | |
718e3744 | 2908 | /* Install static route into rib. */ |
fb148af4 | 2909 | void |
bcd548ff | 2910 | static_install_route (afi_t afi, safi_t safi, struct prefix *p, struct static_route *si) |
718e3744 | 2911 | { |
2912 | struct rib *rib; | |
2913 | struct route_node *rn; | |
2914 | struct route_table *table; | |
6e26278c | 2915 | struct prefix nh_p; |
718e3744 | 2916 | |
2917 | /* Lookup table. */ | |
be5e48ab | 2918 | table = zebra_vrf_table (afi, safi, si->vrf_id); |
718e3744 | 2919 | if (! table) |
2920 | return; | |
2921 | ||
2922 | /* Lookup existing route */ | |
2923 | rn = route_node_get (table, p); | |
9fd92e3c | 2924 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
2925 | { |
2926 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2927 | continue; | |
2928 | ||
2929 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance) | |
2930 | break; | |
2931 | } | |
718e3744 | 2932 | |
2933 | if (rib) | |
2934 | { | |
0d9551dc DS |
2935 | /* if tag value changed , update old value in RIB */ |
2936 | if (rib->tag != si->tag) | |
2937 | rib->tag = si->tag; | |
2938 | ||
718e3744 | 2939 | /* Same distance static route is there. Update it with new |
2940 | nexthop. */ | |
718e3744 | 2941 | route_unlock_node (rn); |
718e3744 | 2942 | switch (si->type) |
7021c425 | 2943 | { |
bcd548ff | 2944 | case STATIC_IPV4_GATEWAY: |
a399694f | 2945 | rib_nexthop_ipv4_add (rib, &si->addr.ipv4, NULL); |
bcd548ff DS |
2946 | nh_p.family = AF_INET; |
2947 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
2948 | nh_p.u.prefix4 = si->addr.ipv4; | |
d82ae0de | 2949 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 2950 | break; |
ba779241 DS |
2951 | case STATIC_IFINDEX: |
2952 | rib_nexthop_ifindex_add (rib, si->ifindex); | |
bcd548ff DS |
2953 | break; |
2954 | case STATIC_IPV4_BLACKHOLE: | |
a399694f | 2955 | rib_nexthop_blackhole_add (rib); |
bcd548ff DS |
2956 | break; |
2957 | case STATIC_IPV6_GATEWAY: | |
a399694f | 2958 | rib_nexthop_ipv6_add (rib, &si->addr.ipv6); |
bcd548ff DS |
2959 | nh_p.family = AF_INET6; |
2960 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
2961 | nh_p.u.prefix6 = si->addr.ipv6; | |
d82ae0de | 2962 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 2963 | break; |
ba779241 DS |
2964 | case STATIC_IPV6_GATEWAY_IFINDEX: |
2965 | rib_nexthop_ipv6_ifindex_add (rib, &si->addr.ipv6, si->ifindex); | |
bcd548ff | 2966 | break; |
4d38fdb4 | 2967 | } |
41ec9222 | 2968 | |
2969 | if (IS_ZEBRA_DEBUG_RIB) | |
2970 | { | |
2971 | char buf[INET6_ADDRSTRLEN]; | |
2972 | if (IS_ZEBRA_DEBUG_RIB) | |
2973 | { | |
2974 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
2975 | zlog_debug ("%u:%s/%d: Modifying route rn %p, rib %p (type %d)", | |
2976 | si->vrf_id, buf, p->prefixlen, rn, rib, rib->type); | |
2977 | } | |
2978 | } | |
2bf26d41 | 2979 | /* Schedule route for processing or invoke NHT, as appropriate. */ |
2980 | if (si->type == STATIC_IPV4_GATEWAY || | |
2981 | si->type == STATIC_IPV6_GATEWAY) | |
2982 | zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, RNH_NEXTHOP_TYPE, &nh_p); | |
2983 | else | |
44e9909d | 2984 | rib_queue_add (rn); |
718e3744 | 2985 | } |
2986 | else | |
2987 | { | |
2988 | /* This is new static route. */ | |
4d38fdb4 | 2989 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2990 | ||
718e3744 | 2991 | rib->type = ZEBRA_ROUTE_STATIC; |
7c8ff89e | 2992 | rib->instance = 0; |
718e3744 | 2993 | rib->distance = si->distance; |
2994 | rib->metric = 0; | |
8f527c5e | 2995 | rib->vrf_id = si->vrf_id; |
12f6fb97 | 2996 | rib->table = si->vrf_id ? (zebra_vrf_lookup(si->vrf_id))->table_id : zebrad.rtm_table_default; |
718e3744 | 2997 | rib->nexthop_num = 0; |
0d9551dc | 2998 | rib->tag = si->tag; |
718e3744 | 2999 | |
3000 | switch (si->type) | |
7021c425 | 3001 | { |
bcd548ff | 3002 | case STATIC_IPV4_GATEWAY: |
a399694f | 3003 | rib_nexthop_ipv4_add (rib, &si->addr.ipv4, NULL); |
bcd548ff DS |
3004 | nh_p.family = AF_INET; |
3005 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
3006 | nh_p.u.prefix4 = si->addr.ipv4; | |
d82ae0de | 3007 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 3008 | break; |
ba779241 DS |
3009 | case STATIC_IFINDEX: |
3010 | rib_nexthop_ifindex_add (rib, si->ifindex); | |
bcd548ff DS |
3011 | break; |
3012 | case STATIC_IPV4_BLACKHOLE: | |
a399694f | 3013 | rib_nexthop_blackhole_add (rib); |
bcd548ff DS |
3014 | break; |
3015 | case STATIC_IPV6_GATEWAY: | |
a399694f | 3016 | rib_nexthop_ipv6_add (rib, &si->addr.ipv6); |
bcd548ff DS |
3017 | nh_p.family = AF_INET6; |
3018 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3019 | nh_p.u.prefix6 = si->addr.ipv6; | |
d82ae0de | 3020 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); |
bcd548ff | 3021 | break; |
ba779241 DS |
3022 | case STATIC_IPV6_GATEWAY_IFINDEX: |
3023 | rib_nexthop_ipv6_ifindex_add (rib, &si->addr.ipv6, si->ifindex); | |
bcd548ff | 3024 | break; |
7021c425 | 3025 | } |
718e3744 | 3026 | |
81dfcaa2 | 3027 | /* Save the flags of this static routes (reject, blackhole) */ |
3028 | rib->flags = si->flags; | |
3029 | ||
41ec9222 | 3030 | if (IS_ZEBRA_DEBUG_RIB) |
3031 | { | |
3032 | char buf[INET6_ADDRSTRLEN]; | |
3033 | if (IS_ZEBRA_DEBUG_RIB) | |
3034 | { | |
3035 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
3036 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d)", | |
3037 | si->vrf_id, buf, p->prefixlen, rn, rib, rib->type); | |
3038 | } | |
3039 | } | |
2bf26d41 | 3040 | /* Link this rib to the tree. Schedule for processing or invoke NHT, |
3041 | * as appropriate. | |
3042 | */ | |
3043 | if (si->type == STATIC_IPV4_GATEWAY || | |
3044 | si->type == STATIC_IPV6_GATEWAY) | |
3045 | { | |
3046 | rib_addnode (rn, rib, 0); | |
3047 | zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, RNH_NEXTHOP_TYPE, &nh_p); | |
3048 | } | |
3049 | else | |
3050 | rib_addnode (rn, rib, 1); | |
718e3744 | 3051 | } |
3052 | } | |
3053 | ||
a1ac18c4 | 3054 | static int |
f2b49ed0 | 3055 | static_nexthop_same (struct nexthop *nexthop, struct static_route *si) |
718e3744 | 3056 | { |
3057 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
3058 | && si->type == STATIC_IPV4_GATEWAY | |
c0551cbb | 3059 | && IPV4_ADDR_SAME (&nexthop->gate.ipv4, &si->addr.ipv4)) |
718e3744 | 3060 | return 1; |
ba779241 DS |
3061 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
3062 | && si->type == STATIC_IFINDEX | |
3063 | && nexthop->ifindex == si->ifindex) | |
718e3744 | 3064 | return 1; |
595db7f1 | 3065 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
3066 | && si->type == STATIC_IPV4_BLACKHOLE) | |
3067 | return 1; | |
f2b49ed0 DS |
3068 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
3069 | && si->type == STATIC_IPV6_GATEWAY | |
3070 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->addr.ipv6)) | |
3071 | return 1; | |
ba779241 DS |
3072 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX |
3073 | && si->type == STATIC_IPV6_GATEWAY_IFINDEX | |
f2b49ed0 | 3074 | && IPV6_ADDR_SAME (&nexthop->gate.ipv6, &si->addr.ipv6) |
ba779241 | 3075 | && nexthop->ifindex == si->ifindex) |
f2b49ed0 | 3076 | return 1; |
e8e1946e | 3077 | return 0; |
718e3744 | 3078 | } |
3079 | ||
3080 | /* Uninstall static route from RIB. */ | |
fb148af4 | 3081 | void |
b8a1effa | 3082 | static_uninstall_route (afi_t afi, safi_t safi, struct prefix *p, struct static_route *si) |
718e3744 | 3083 | { |
3084 | struct route_node *rn; | |
3085 | struct rib *rib; | |
3086 | struct nexthop *nexthop; | |
3087 | struct route_table *table; | |
6e26278c | 3088 | struct prefix nh_p; |
718e3744 | 3089 | |
3090 | /* Lookup table. */ | |
be5e48ab | 3091 | table = zebra_vrf_table (afi, safi, si->vrf_id); |
718e3744 | 3092 | if (! table) |
3093 | return; | |
4d38fdb4 | 3094 | |
718e3744 | 3095 | /* Lookup existing route with type and distance. */ |
3096 | rn = route_node_lookup (table, p); | |
3097 | if (! rn) | |
3098 | return; | |
3099 | ||
9fd92e3c | 3100 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 PJ |
3101 | { |
3102 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
3103 | continue; | |
3104 | ||
0d9551dc DS |
3105 | if (rib->type == ZEBRA_ROUTE_STATIC && rib->distance == si->distance && |
3106 | rib->tag == si->tag) | |
6d691129 PJ |
3107 | break; |
3108 | } | |
718e3744 | 3109 | |
3110 | if (! rib) | |
3111 | { | |
3112 | route_unlock_node (rn); | |
3113 | return; | |
3114 | } | |
3115 | ||
3116 | /* Lookup nexthop. */ | |
3117 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
f2b49ed0 | 3118 | if (static_nexthop_same (nexthop, si)) |
718e3744 | 3119 | break; |
3120 | ||
3121 | /* Can't find nexthop. */ | |
3122 | if (! nexthop) | |
3123 | { | |
3124 | route_unlock_node (rn); | |
3125 | return; | |
3126 | } | |
3127 | ||
3128 | /* Check nexthop. */ | |
3129 | if (rib->nexthop_num == 1) | |
6d691129 | 3130 | rib_delnode (rn, rib); |
718e3744 | 3131 | else |
3132 | { | |
94ad353d DS |
3133 | /* Mark this nexthop as inactive and reinstall the route. Then, delete |
3134 | * the nexthop. There is no need to re-evaluate the route for this | |
3135 | * scenario. | |
3136 | */ | |
41ec9222 | 3137 | if (IS_ZEBRA_DEBUG_RIB) |
3138 | { | |
3139 | char buf[INET6_ADDRSTRLEN]; | |
3140 | if (IS_ZEBRA_DEBUG_RIB) | |
3141 | { | |
3142 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
3143 | zlog_debug ("%u:%s/%d: Modifying route rn %p, rib %p (type %d)", | |
3144 | si->vrf_id, buf, p->prefixlen, rn, rib, rib->type); | |
3145 | } | |
3146 | } | |
94ad353d | 3147 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
6baeb988 | 3148 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
94ad353d | 3149 | { |
dccc5225 | 3150 | /* If there are other active nexthops, do an update. */ |
3151 | if (rib->nexthop_active_num > 1) | |
3152 | { | |
3153 | rib_install_kernel (rn, rib, 1); | |
3154 | redistribute_update (&rn->p, rib, NULL); | |
3155 | } | |
3156 | else | |
3157 | { | |
3158 | redistribute_delete (&rn->p, rib); | |
3159 | rib_uninstall_kernel (rn, rib); | |
3160 | } | |
94ad353d | 3161 | } |
6e26278c | 3162 | |
b8a1effa DS |
3163 | if (afi == AFI_IP) |
3164 | { | |
3165 | /* Delete the nexthop and dereg from NHT */ | |
3166 | nh_p.family = AF_INET; | |
3167 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
3168 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
3169 | } | |
3170 | else | |
3171 | { | |
3172 | nh_p.family = AF_INET6; | |
3173 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
3174 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
3175 | } | |
a399694f | 3176 | rib_nexthop_delete (rib, nexthop); |
d82ae0de | 3177 | zebra_deregister_rnh_static_nh(si->vrf_id, &nh_p, rn); |
a399694f | 3178 | nexthop_free (nexthop); |
718e3744 | 3179 | } |
718e3744 | 3180 | /* Unlock node. */ |
3181 | route_unlock_node (rn); | |
3182 | } | |
3183 | ||
718e3744 | 3184 | int |
b892f1dd | 3185 | static_add_ipv4 (safi_t safi, struct prefix *p, struct in_addr *gate, ifindex_t ifindex, |
a3d21ef3 DS |
3186 | const char *ifname, u_char flags, u_short tag, |
3187 | u_char distance, struct zebra_vrf *zvrf) | |
718e3744 | 3188 | { |
3189 | u_char type = 0; | |
3190 | struct route_node *rn; | |
c0551cbb DS |
3191 | struct static_route *si; |
3192 | struct static_route *pp; | |
3193 | struct static_route *cp; | |
3194 | struct static_route *update = NULL; | |
b78a80d7 | 3195 | struct route_table *stable = zvrf->stable[AFI_IP][safi]; |
718e3744 | 3196 | |
718e3744 | 3197 | if (! stable) |
3198 | return -1; | |
3199 | ||
3200 | /* Lookup static route prefix. */ | |
3201 | rn = route_node_get (stable, p); | |
3202 | ||
3203 | /* Make flags. */ | |
3204 | if (gate) | |
3205 | type = STATIC_IPV4_GATEWAY; | |
ba779241 DS |
3206 | else if (ifindex) |
3207 | type = STATIC_IFINDEX; | |
595db7f1 | 3208 | else |
3209 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 3210 | |
3211 | /* Do nothing if there is a same static route. */ | |
3212 | for (si = rn->info; si; si = si->next) | |
3213 | { | |
3214 | if (type == si->type | |
c0551cbb | 3215 | && (! gate || IPV4_ADDR_SAME (gate, &si->addr.ipv4)) |
ba779241 | 3216 | && (! ifindex || ifindex == si->ifindex)) |
718e3744 | 3217 | { |
0d9551dc | 3218 | if ((distance == si->distance) && (tag == si->tag)) |
718e3744 | 3219 | { |
3220 | route_unlock_node (rn); | |
3221 | return 0; | |
3222 | } | |
3223 | else | |
3224 | update = si; | |
3225 | } | |
3226 | } | |
3227 | ||
0d9551dc | 3228 | /* Distance or tag changed. */ |
718e3744 | 3229 | if (update) |
b78a80d7 | 3230 | static_delete_ipv4 (safi, p, gate, ifindex, update->tag, update->distance, zvrf); |
718e3744 | 3231 | |
3232 | /* Make new static route structure. */ | |
c0551cbb | 3233 | si = XCALLOC (MTYPE_STATIC_ROUTE, sizeof (struct static_route)); |
718e3744 | 3234 | |
3235 | si->type = type; | |
3236 | si->distance = distance; | |
81dfcaa2 | 3237 | si->flags = flags; |
0d9551dc | 3238 | si->tag = tag; |
b9f1114e | 3239 | si->vrf_id = zvrf->vrf_id; |
ba779241 | 3240 | si->ifindex = ifindex; |
fb148af4 | 3241 | if (si->ifindex) |
a3d21ef3 | 3242 | strcpy(si->ifname, ifname); |
718e3744 | 3243 | |
3244 | if (gate) | |
c0551cbb | 3245 | si->addr.ipv4 = *gate; |
718e3744 | 3246 | |
3247 | /* Add new static route information to the tree with sort by | |
3248 | distance value and gateway address. */ | |
3249 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3250 | { | |
3251 | if (si->distance < cp->distance) | |
3252 | break; | |
3253 | if (si->distance > cp->distance) | |
3254 | continue; | |
3255 | if (si->type == STATIC_IPV4_GATEWAY && cp->type == STATIC_IPV4_GATEWAY) | |
3256 | { | |
c0551cbb | 3257 | if (ntohl (si->addr.ipv4.s_addr) < ntohl (cp->addr.ipv4.s_addr)) |
718e3744 | 3258 | break; |
c0551cbb | 3259 | if (ntohl (si->addr.ipv4.s_addr) > ntohl (cp->addr.ipv4.s_addr)) |
718e3744 | 3260 | continue; |
3261 | } | |
3262 | } | |
3263 | ||
3264 | /* Make linked list. */ | |
3265 | if (pp) | |
3266 | pp->next = si; | |
3267 | else | |
3268 | rn->info = si; | |
3269 | if (cp) | |
3270 | cp->prev = si; | |
3271 | si->prev = pp; | |
3272 | si->next = cp; | |
3273 | ||
3274 | /* Install into rib. */ | |
b78a80d7 | 3275 | static_install_route (AFI_IP, safi, p, si); |
718e3744 | 3276 | |
3277 | return 1; | |
3278 | } | |
3279 | ||
718e3744 | 3280 | int |
b892f1dd | 3281 | static_delete_ipv4 (safi_t safi, struct prefix *p, struct in_addr *gate, ifindex_t ifindex, |
b9f1114e | 3282 | u_short tag, u_char distance, struct zebra_vrf *zvrf) |
718e3744 | 3283 | { |
3284 | u_char type = 0; | |
3285 | struct route_node *rn; | |
c0551cbb | 3286 | struct static_route *si; |
718e3744 | 3287 | struct route_table *stable; |
3288 | ||
3289 | /* Lookup table. */ | |
b78a80d7 | 3290 | stable = zebra_vrf_static_table (AFI_IP, safi, zvrf); |
718e3744 | 3291 | if (! stable) |
3292 | return -1; | |
3293 | ||
3294 | /* Lookup static route prefix. */ | |
3295 | rn = route_node_lookup (stable, p); | |
3296 | if (! rn) | |
3297 | return 0; | |
3298 | ||
3299 | /* Make flags. */ | |
3300 | if (gate) | |
3301 | type = STATIC_IPV4_GATEWAY; | |
ba779241 DS |
3302 | else if (ifindex) |
3303 | type = STATIC_IFINDEX; | |
595db7f1 | 3304 | else |
3305 | type = STATIC_IPV4_BLACKHOLE; | |
718e3744 | 3306 | |
3307 | /* Find same static route is the tree */ | |
3308 | for (si = rn->info; si; si = si->next) | |
3309 | if (type == si->type | |
c0551cbb | 3310 | && (! gate || IPV4_ADDR_SAME (gate, &si->addr.ipv4)) |
ba779241 | 3311 | && (! ifindex || ifindex == si->ifindex) |
0d9551dc | 3312 | && (! tag || (tag == si->tag))) |
718e3744 | 3313 | break; |
3314 | ||
3315 | /* Can't find static route. */ | |
3316 | if (! si) | |
3317 | { | |
3318 | route_unlock_node (rn); | |
3319 | return 0; | |
3320 | } | |
3321 | ||
3322 | /* Install into rib. */ | |
b78a80d7 | 3323 | static_uninstall_route (AFI_IP, safi, p, si); |
718e3744 | 3324 | |
3325 | /* Unlink static route from linked list. */ | |
3326 | if (si->prev) | |
3327 | si->prev->next = si->next; | |
3328 | else | |
3329 | rn->info = si->next; | |
3330 | if (si->next) | |
3331 | si->next->prev = si->prev; | |
143a385f | 3332 | route_unlock_node (rn); |
718e3744 | 3333 | |
3334 | /* Free static route configuration. */ | |
c0551cbb | 3335 | XFREE (MTYPE_STATIC_ROUTE, si); |
718e3744 | 3336 | |
143a385f | 3337 | route_unlock_node (rn); |
3338 | ||
718e3744 | 3339 | return 1; |
3340 | } | |
3341 | ||
718e3744 | 3342 | int |
7c8ff89e | 3343 | rib_add_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
b892f1dd | 3344 | struct in6_addr *gate, ifindex_t ifindex, vrf_id_t vrf_id, |
78104b9b | 3345 | u_int32_t table_id, u_int32_t metric, u_char distance, safi_t safi) |
718e3744 | 3346 | { |
3347 | struct rib *rib; | |
3348 | struct rib *same = NULL; | |
3349 | struct route_table *table; | |
3350 | struct route_node *rn; | |
3351 | struct nexthop *nexthop; | |
3352 | ||
718e3744 | 3353 | /* Lookup table. */ |
ca46a78e | 3354 | table = zebra_vrf_table_with_table_id (AFI_IP6, safi, vrf_id, table_id); |
718e3744 | 3355 | if (! table) |
3356 | return 0; | |
3357 | ||
3358 | /* Make sure mask is applied. */ | |
3359 | apply_mask_ipv6 (p); | |
3360 | ||
3361 | /* Set default distance by route type. */ | |
be61c4eb | 3362 | if (!distance) |
3363 | distance = route_info[type].distance; | |
718e3744 | 3364 | |
3365 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
3366 | distance = 200; | |
3367 | ||
718e3744 | 3368 | /* Lookup route node.*/ |
3369 | rn = route_node_get (table, (struct prefix *) p); | |
3370 | ||
3371 | /* If same type of route are installed, treat it as a implicit | |
3372 | withdraw. */ | |
9fd92e3c | 3373 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3374 | { |
6d691129 PJ |
3375 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3376 | continue; | |
3377 | ||
ebf1ead0 | 3378 | if (rib->type != type) |
3379 | continue; | |
7c8ff89e DS |
3380 | if (rib->instance != instance) |
3381 | continue; | |
ebf1ead0 | 3382 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 3383 | { |
3384 | same = rib; | |
718e3744 | 3385 | break; |
3386 | } | |
ebf1ead0 | 3387 | else if ((nexthop = rib->nexthop) && |
3388 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3389 | nexthop->ifindex == ifindex) | |
3390 | { | |
3391 | rib->refcnt++; | |
3392 | return 0; | |
3393 | } | |
718e3744 | 3394 | } |
3395 | ||
3396 | /* Allocate new rib structure. */ | |
4d38fdb4 | 3397 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
3398 | ||
718e3744 | 3399 | rib->type = type; |
7c8ff89e | 3400 | rib->instance = instance; |
718e3744 | 3401 | rib->distance = distance; |
3402 | rib->flags = flags; | |
3403 | rib->metric = metric; | |
7a4bb9c5 | 3404 | rib->table = table_id; |
78104b9b | 3405 | rib->vrf_id = vrf_id; |
718e3744 | 3406 | rib->nexthop_num = 0; |
3407 | rib->uptime = time (NULL); | |
3408 | ||
3409 | /* Nexthop settings. */ | |
3410 | if (gate) | |
3411 | { | |
3412 | if (ifindex) | |
a399694f | 3413 | rib_nexthop_ipv6_ifindex_add (rib, gate, ifindex); |
718e3744 | 3414 | else |
a399694f | 3415 | rib_nexthop_ipv6_add (rib, gate); |
718e3744 | 3416 | } |
3417 | else | |
a399694f | 3418 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 3419 | |
3420 | /* If this route is kernel route, set FIB flag to the route. */ | |
3421 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
3422 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
3423 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3424 | ||
3425 | /* Link new rib to node.*/ | |
fed643f4 | 3426 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 3427 | { |
3428 | char buf[INET6_ADDRSTRLEN]; | |
3429 | if (IS_ZEBRA_DEBUG_RIB) | |
3430 | { | |
3431 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
3432 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
3433 | "existing %p", | |
6c4f4e6e DL |
3434 | vrf_id, buf, p->prefixlen, (void *)rn, |
3435 | (void *)rib, rib->type, (void *)same); | |
41ec9222 | 3436 | } |
3437 | ||
3438 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
3439 | rib_dump ((struct prefix *)p, rib); | |
3440 | } | |
2bf26d41 | 3441 | rib_addnode (rn, rib, 1); |
718e3744 | 3442 | |
718e3744 | 3443 | /* Free implicit route.*/ |
3444 | if (same) | |
4d38fdb4 | 3445 | rib_delnode (rn, same); |
3446 | ||
3447 | route_unlock_node (rn); | |
718e3744 | 3448 | return 0; |
3449 | } | |
3450 | ||
41fc2714 | 3451 | int |
8a92a8a0 | 3452 | rib_add_ipv6_multipath (struct prefix *p, struct rib *rib, safi_t safi, |
b892f1dd | 3453 | ifindex_t ifindex) |
41fc2714 DS |
3454 | { |
3455 | struct route_table *table; | |
3456 | struct route_node *rn; | |
3457 | struct rib *same = NULL; | |
3458 | struct nexthop *nexthop; | |
3459 | int ret = 0; | |
154caaed | 3460 | int family; |
3461 | ||
3462 | if (!rib) | |
3463 | return 0; | |
41fc2714 | 3464 | |
8a92a8a0 | 3465 | if (p->family == AF_INET) |
154caaed | 3466 | family = AFI_IP; |
3467 | else | |
3468 | family = AFI_IP6; | |
8a92a8a0 | 3469 | |
154caaed | 3470 | /* Lookup table. */ |
3471 | table = zebra_vrf_table_with_table_id (family, safi, rib->vrf_id, rib->table); | |
3472 | if (! table) | |
3473 | return 0; | |
3474 | ||
3475 | if (p->family == AF_INET) | |
3476 | { | |
8a92a8a0 | 3477 | /* Make it sure prefixlen is applied to the prefix. */ |
88177fe3 | 3478 | apply_mask_ipv4 ((struct prefix_ipv4 *)p); |
7a4bb9c5 DS |
3479 | } |
3480 | else | |
3481 | { | |
8a92a8a0 | 3482 | /* Make sure mask is applied. */ |
88177fe3 | 3483 | apply_mask_ipv6 ((struct prefix_ipv6 *)p); |
8a92a8a0 | 3484 | } |
41fc2714 DS |
3485 | |
3486 | /* Set default distance by route type. */ | |
3487 | if (rib->distance == 0) | |
3488 | { | |
3489 | rib->distance = route_info[rib->type].distance; | |
3490 | ||
3491 | /* iBGP distance is 200. */ | |
3492 | if (rib->type == ZEBRA_ROUTE_BGP | |
3493 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
3494 | rib->distance = 200; | |
3495 | } | |
3496 | ||
3497 | /* Lookup route node.*/ | |
3498 | rn = route_node_get (table, (struct prefix *) p); | |
3499 | ||
3500 | /* If same type of route are installed, treat it as a implicit | |
3501 | withdraw. */ | |
3502 | RNODE_FOREACH_RIB (rn, same) { | |
3503 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
3504 | continue; | |
3505 | } | |
3506 | if (same->type != rib->type) { | |
3507 | continue; | |
3508 | } | |
3509 | ||
7c8ff89e DS |
3510 | if (same->instance != rib->instance) { |
3511 | continue; | |
3512 | } | |
3513 | ||
41fc2714 DS |
3514 | if (same->table != rib->table) { |
3515 | continue; | |
3516 | } | |
3517 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
3518 | break; | |
3519 | } | |
3520 | else if ((nexthop = same->nexthop) && | |
3521 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3522 | nexthop->ifindex == ifindex) { | |
3523 | same->refcnt++; | |
3524 | return 0; | |
3525 | } | |
3526 | } | |
3527 | ||
3528 | /* If this route is kernel route, set FIB flag to the route. */ | |
3529 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
3530 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
3531 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3532 | } | |
3533 | } | |
3534 | ||
3535 | /* Link new rib to node.*/ | |
41ec9222 | 3536 | if (IS_ZEBRA_DEBUG_RIB) |
3537 | { | |
3538 | char buf[INET6_ADDRSTRLEN]; | |
3539 | if (IS_ZEBRA_DEBUG_RIB) | |
3540 | { | |
3541 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
3542 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
3543 | "existing %p", | |
3544 | rib->vrf_id, buf, p->prefixlen, rn, rib, rib->type, same); | |
3545 | } | |
3546 | ||
3547 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
3548 | rib_dump ((struct prefix *)p, rib); | |
3549 | } | |
2bf26d41 | 3550 | rib_addnode (rn, rib, 1); |
41fc2714 | 3551 | ret = 1; |
41ec9222 | 3552 | |
41fc2714 DS |
3553 | /* Free implicit route.*/ |
3554 | if (same) | |
41fc2714 | 3555 | { |
41ec9222 | 3556 | rib_delnode (rn, same); |
3557 | ret = -1; | |
41fc2714 | 3558 | } |
41fc2714 DS |
3559 | |
3560 | route_unlock_node (rn); | |
3561 | return ret; | |
3562 | } | |
3563 | ||
ebf1ead0 | 3564 | /* XXX factor with rib_delete_ipv6 */ |
12f6fb97 | 3565 | |
718e3744 | 3566 | int |
7c8ff89e | 3567 | rib_delete_ipv6 (int type, u_short instance, int flags, struct prefix_ipv6 *p, |
b892f1dd | 3568 | struct in6_addr *gate, ifindex_t ifindex, vrf_id_t vrf_id, |
78104b9b | 3569 | u_int32_t table_id, safi_t safi) |
718e3744 | 3570 | { |
3571 | struct route_table *table; | |
3572 | struct route_node *rn; | |
3573 | struct rib *rib; | |
3574 | struct rib *fib = NULL; | |
3575 | struct rib *same = NULL; | |
fa713d9e CF |
3576 | struct nexthop *nexthop, *tnexthop; |
3577 | int recursing; | |
35d921cc | 3578 | char buf1[PREFIX_STRLEN]; |
81cce018 | 3579 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 3580 | |
3581 | /* Apply mask. */ | |
3582 | apply_mask_ipv6 (p); | |
3583 | ||
3584 | /* Lookup table. */ | |
ca46a78e | 3585 | table = zebra_vrf_table_with_table_id (AFI_IP6, safi, vrf_id, table_id); |
718e3744 | 3586 | if (! table) |
3587 | return 0; | |
4d38fdb4 | 3588 | |
718e3744 | 3589 | /* Lookup route node. */ |
3590 | rn = route_node_lookup (table, (struct prefix *) p); | |
3591 | if (! rn) | |
3592 | { | |
41ec9222 | 3593 | if (IS_ZEBRA_DEBUG_RIB) |
35d921cc TT |
3594 | zlog_debug ("%u:%s: doesn't exist in rib", |
3595 | vrf_id, prefix2str (p, buf1, sizeof(buf1))); | |
718e3744 | 3596 | return ZEBRA_ERR_RTNOEXIST; |
3597 | } | |
3598 | ||
3599 | /* Lookup same type route. */ | |
9fd92e3c | 3600 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 3601 | { |
6d691129 PJ |
3602 | if (CHECK_FLAG(rib->status, RIB_ENTRY_REMOVED)) |
3603 | continue; | |
3604 | ||
718e3744 | 3605 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3606 | fib = rib; | |
3607 | ||
ebf1ead0 | 3608 | if (rib->type != type) |
3609 | continue; | |
7c8ff89e DS |
3610 | if (rib->instance != instance) |
3611 | continue; | |
ebf1ead0 | 3612 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 3613 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 3614 | { |
4f1735fd MF |
3615 | if (nexthop->ifindex != ifindex) |
3616 | continue; | |
ebf1ead0 | 3617 | if (rib->refcnt) |
718e3744 | 3618 | { |
ebf1ead0 | 3619 | rib->refcnt--; |
3620 | route_unlock_node (rn); | |
3621 | route_unlock_node (rn); | |
3622 | return 0; | |
718e3744 | 3623 | } |
ebf1ead0 | 3624 | same = rib; |
3625 | break; | |
718e3744 | 3626 | } |
ebf1ead0 | 3627 | /* Make sure that the route found has the same gateway. */ |
fa713d9e CF |
3628 | else |
3629 | { | |
3630 | if (gate == NULL) | |
3631 | { | |
3632 | same = rib; | |
3633 | break; | |
3634 | } | |
3635 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
3636 | if (IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
3637 | { | |
3638 | same = rib; | |
3639 | break; | |
3640 | } | |
3641 | if (same) | |
3642 | break; | |
3643 | } | |
718e3744 | 3644 | } |
3645 | ||
3646 | /* If same type of route can't be found and this message is from | |
3647 | kernel. */ | |
3648 | if (! same) | |
3649 | { | |
2037f143 DS |
3650 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
3651 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
3652 | { | |
41ec9222 | 3653 | if (IS_ZEBRA_DEBUG_RIB) |
3654 | zlog_debug ("%u:%s/%d: rn %p, rib %p (type %d) was deleted " | |
3655 | "from kernel, adding", | |
3656 | vrf_id, inet_ntop (p->family, &p->prefix, buf1, INET6_ADDRSTRLEN), | |
3657 | p->prefixlen, rn, fib, fib->type); | |
6baf7bb8 DS |
3658 | if (allow_delete) |
3659 | { | |
3660 | /* Unset flags. */ | |
3661 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
3662 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
3663 | ||
3664 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
3665 | } | |
3666 | else | |
3667 | { | |
3668 | /* This means someone else, other than Zebra, has deleted a Zebra | |
3669 | * route from the kernel. We will add it back */ | |
3670 | rib_install_kernel(rn, fib, 0); | |
3671 | } | |
2037f143 | 3672 | } |
718e3744 | 3673 | else |
3674 | { | |
3675 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3676 | { | |
3677 | if (gate) | |
41ec9222 | 3678 | zlog_debug ("%s: vrf %u via %s ifindex %d type %d " |
35d921cc TT |
3679 | "doesn't exist in rib", |
3680 | prefix2str (p, buf1, sizeof(buf1)), vrf_id, | |
3681 | inet_ntop (AF_INET6, gate, buf2, INET6_ADDRSTRLEN), | |
3682 | ifindex, | |
3683 | type); | |
718e3744 | 3684 | else |
41ec9222 | 3685 | zlog_debug ("%s: vrf %u ifindex %d type %d doesn't exist in rib", |
35d921cc TT |
3686 | prefix2str (p, buf1, sizeof(buf1)), vrf_id, |
3687 | ifindex, | |
3688 | type); | |
718e3744 | 3689 | } |
3690 | route_unlock_node (rn); | |
3691 | return ZEBRA_ERR_RTNOEXIST; | |
3692 | } | |
3693 | } | |
3694 | ||
718e3744 | 3695 | if (same) |
4d38fdb4 | 3696 | rib_delnode (rn, same); |
3697 | ||
718e3744 | 3698 | route_unlock_node (rn); |
718e3744 | 3699 | return 0; |
3700 | } | |
6b0655a2 | 3701 | |
718e3744 | 3702 | /* Add static route into static route configuration. */ |
3703 | int | |
3704 | static_add_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
b892f1dd | 3705 | ifindex_t ifindex, const char *ifname, u_char flags, |
a3d21ef3 | 3706 | u_short tag, u_char distance, struct zebra_vrf *zvrf) |
718e3744 | 3707 | { |
3708 | struct route_node *rn; | |
c0551cbb DS |
3709 | struct static_route *si; |
3710 | struct static_route *pp; | |
3711 | struct static_route *cp; | |
526e1728 | 3712 | struct static_route *update = NULL; |
78104b9b | 3713 | struct route_table *stable = zvrf->stable[AFI_IP6][SAFI_UNICAST]; |
718e3744 | 3714 | |
718e3744 | 3715 | if (! stable) |
3716 | return -1; | |
27b47253 PJ |
3717 | |
3718 | if (!gate && | |
ba779241 | 3719 | (type == STATIC_IPV6_GATEWAY || type == STATIC_IPV6_GATEWAY_IFINDEX)) |
27b47253 PJ |
3720 | return -1; |
3721 | ||
ba779241 DS |
3722 | if (!ifindex && |
3723 | (type == STATIC_IPV6_GATEWAY_IFINDEX || type == STATIC_IFINDEX)) | |
27b47253 | 3724 | return -1; |
718e3744 | 3725 | |
3726 | /* Lookup static route prefix. */ | |
3727 | rn = route_node_get (stable, p); | |
3728 | ||
3729 | /* Do nothing if there is a same static route. */ | |
3730 | for (si = rn->info; si; si = si->next) | |
3731 | { | |
526e1728 | 3732 | if (type == si->type |
c0551cbb | 3733 | && (! gate || IPV6_ADDR_SAME (gate, &si->addr.ipv6)) |
ba779241 | 3734 | && (! ifindex || ifindex == si->ifindex)) |
718e3744 | 3735 | { |
526e1728 DS |
3736 | if ((distance == si->distance) && (tag == si->tag)) |
3737 | { | |
3738 | route_unlock_node (rn); | |
3739 | return 0; | |
3740 | } | |
3741 | else | |
3742 | update = si; | |
718e3744 | 3743 | } |
3744 | } | |
3745 | ||
526e1728 DS |
3746 | /* Distance or tag changed. */ |
3747 | if (update) | |
b9f1114e | 3748 | static_delete_ipv6 (p, type, gate, ifindex, update->tag, update->distance, zvrf); |
526e1728 | 3749 | |
718e3744 | 3750 | /* Make new static route structure. */ |
c0551cbb | 3751 | si = XCALLOC (MTYPE_STATIC_ROUTE, sizeof (struct static_route)); |
718e3744 | 3752 | |
3753 | si->type = type; | |
3754 | si->distance = distance; | |
81dfcaa2 | 3755 | si->flags = flags; |
0d9551dc | 3756 | si->tag = tag; |
b9f1114e | 3757 | si->vrf_id = zvrf->vrf_id; |
ba779241 | 3758 | si->ifindex = ifindex; |
a3d21ef3 DS |
3759 | if (si->ifindex) |
3760 | strcpy (si->ifname, ifname); | |
718e3744 | 3761 | |
3762 | switch (type) | |
3763 | { | |
3764 | case STATIC_IPV6_GATEWAY: | |
c0551cbb | 3765 | si->addr.ipv6 = *gate; |
718e3744 | 3766 | break; |
ba779241 | 3767 | case STATIC_IPV6_GATEWAY_IFINDEX: |
c0551cbb | 3768 | si->addr.ipv6 = *gate; |
718e3744 | 3769 | break; |
3770 | } | |
3771 | ||
3772 | /* Add new static route information to the tree with sort by | |
3773 | distance value and gateway address. */ | |
3774 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) | |
3775 | { | |
3776 | if (si->distance < cp->distance) | |
3777 | break; | |
3778 | if (si->distance > cp->distance) | |
3779 | continue; | |
3780 | } | |
3781 | ||
3782 | /* Make linked list. */ | |
3783 | if (pp) | |
3784 | pp->next = si; | |
3785 | else | |
3786 | rn->info = si; | |
3787 | if (cp) | |
3788 | cp->prev = si; | |
3789 | si->prev = pp; | |
3790 | si->next = cp; | |
3791 | ||
3792 | /* Install into rib. */ | |
bcd548ff | 3793 | static_install_route (AFI_IP6, SAFI_UNICAST, p, si); |
718e3744 | 3794 | |
3795 | return 1; | |
3796 | } | |
3797 | ||
3798 | /* Delete static route from static route configuration. */ | |
3799 | int | |
3800 | static_delete_ipv6 (struct prefix *p, u_char type, struct in6_addr *gate, | |
b892f1dd | 3801 | ifindex_t ifindex, u_short tag, u_char distance, |
b9f1114e | 3802 | struct zebra_vrf *zvrf) |
718e3744 | 3803 | { |
3804 | struct route_node *rn; | |
c0551cbb | 3805 | struct static_route *si; |
718e3744 | 3806 | struct route_table *stable; |
3807 | ||
3808 | /* Lookup table. */ | |
01bb6d57 | 3809 | stable = zebra_vrf_static_table (AFI_IP6, SAFI_UNICAST, zvrf); |
718e3744 | 3810 | if (! stable) |
3811 | return -1; | |
3812 | ||
3813 | /* Lookup static route prefix. */ | |
3814 | rn = route_node_lookup (stable, p); | |
3815 | if (! rn) | |
3816 | return 0; | |
3817 | ||
3818 | /* Find same static route is the tree */ | |
3819 | for (si = rn->info; si; si = si->next) | |
3820 | if (distance == si->distance | |
3821 | && type == si->type | |
c0551cbb | 3822 | && (! gate || IPV6_ADDR_SAME (gate, &si->addr.ipv6)) |
ba779241 | 3823 | && (! ifindex || ifindex == si->ifindex) |
0d9551dc | 3824 | && (! tag || (tag == si->tag))) |
718e3744 | 3825 | break; |
3826 | ||
3827 | /* Can't find static route. */ | |
3828 | if (! si) | |
3829 | { | |
3830 | route_unlock_node (rn); | |
3831 | return 0; | |
3832 | } | |
3833 | ||
3834 | /* Install into rib. */ | |
b8a1effa | 3835 | static_uninstall_route (AFI_IP6, SAFI_UNICAST, p, si); |
718e3744 | 3836 | |
3837 | /* Unlink static route from linked list. */ | |
3838 | if (si->prev) | |
3839 | si->prev->next = si->next; | |
3840 | else | |
3841 | rn->info = si->next; | |
3842 | if (si->next) | |
3843 | si->next->prev = si->prev; | |
3844 | ||
3845 | /* Free static route configuration. */ | |
c0551cbb | 3846 | XFREE (MTYPE_STATIC_ROUTE, si); |
718e3744 | 3847 | |
3848 | return 1; | |
3849 | } | |
6b0655a2 | 3850 | |
1c848137 | 3851 | /* Schedule routes of a particular table (address-family) based on event. */ |
3852 | static void | |
3853 | rib_update_table (struct route_table *table, rib_update_event_t event) | |
b84c7253 | 3854 | { |
3855 | struct route_node *rn; | |
b84c7253 | 3856 | struct rib *rib, *next; |
3857 | ||
1c848137 | 3858 | /* Walk all routes and queue for processing, if appropriate for |
3859 | * the trigger event. | |
3860 | */ | |
3861 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
3862 | { | |
3863 | switch (event) | |
3864 | { | |
3865 | case RIB_UPDATE_IF_CHANGE: | |
3866 | /* Examine all routes that won't get processed by the protocol or | |
3867 | * triggered by nexthop evaluation (NHT). This would be system, | |
3868 | * kernel and certain static routes. Note that NHT will get | |
3869 | * triggered upon an interface event as connected routes always | |
3870 | * get queued for processing. | |
3871 | */ | |
3872 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
3873 | { | |
3874 | if (rib->type == ZEBRA_ROUTE_OSPF || | |
3875 | rib->type == ZEBRA_ROUTE_OSPF6 || | |
3876 | rib->type == ZEBRA_ROUTE_BGP) | |
3877 | continue; /* protocol will handle. */ | |
3878 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
3879 | { | |
3880 | struct nexthop *nh; | |
3881 | for (nh = rib->nexthop; nh; nh = nh->next) | |
3882 | if (!(nh->type == NEXTHOP_TYPE_IPV4 || | |
3883 | nh->type == NEXTHOP_TYPE_IPV6)) | |
3884 | break; | |
3885 | ||
3886 | /* If we only have nexthops to a gateway, NHT will | |
3887 | * take care. | |
3888 | */ | |
3889 | if (nh) | |
44e9909d | 3890 | rib_queue_add (rn); |
1c848137 | 3891 | } |
3892 | else | |
44e9909d | 3893 | rib_queue_add (rn); |
1c848137 | 3894 | } |
3895 | break; | |
b84c7253 | 3896 | |
1c848137 | 3897 | case RIB_UPDATE_RMAP_CHANGE: |
3898 | case RIB_UPDATE_OTHER: | |
3899 | /* Right now, examine all routes. Can restrict to a protocol in | |
3900 | * some cases (TODO). | |
3901 | */ | |
3902 | if (rnode_to_ribs (rn)) | |
44e9909d | 3903 | rib_queue_add (rn); |
1c848137 | 3904 | break; |
3905 | ||
3906 | default: | |
3907 | break; | |
3908 | } | |
3909 | } | |
b84c7253 | 3910 | } |
3911 | ||
718e3744 | 3912 | /* RIB update function. */ |
3913 | void | |
1c848137 | 3914 | rib_update (vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 3915 | { |
718e3744 | 3916 | struct route_table *table; |
1c848137 | 3917 | |
3918 | /* Process routes of interested address-families. */ | |
78104b9b | 3919 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 3920 | if (table) |
1c848137 | 3921 | rib_update_table (table, event); |
718e3744 | 3922 | |
78104b9b | 3923 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 3924 | if (table) |
1c848137 | 3925 | rib_update_table (table, event); |
718e3744 | 3926 | } |
3927 | ||
718e3744 | 3928 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3929 | static void |
718e3744 | 3930 | rib_weed_table (struct route_table *table) |
3931 | { | |
3932 | struct route_node *rn; | |
3933 | struct rib *rib; | |
3934 | struct rib *next; | |
3935 | ||
3936 | if (table) | |
3937 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3938 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3939 | { |
6d691129 PJ |
3940 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3941 | continue; | |
3942 | ||
b21b19c5 | 3943 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3944 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3945 | rib_delnode (rn, rib); |
718e3744 | 3946 | } |
3947 | } | |
3948 | ||
3949 | /* Delete all routes from non main table. */ | |
3950 | void | |
a1ac18c4 | 3951 | rib_weed_tables (void) |
718e3744 | 3952 | { |
78104b9b FL |
3953 | vrf_iter_t iter; |
3954 | struct zebra_vrf *zvrf; | |
3955 | ||
3956 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3957 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3958 | { | |
3959 | rib_weed_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3960 | rib_weed_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3961 | } | |
718e3744 | 3962 | } |
6b0655a2 | 3963 | |
718e3744 | 3964 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3965 | static void |
718e3744 | 3966 | rib_sweep_table (struct route_table *table) |
3967 | { | |
3968 | struct route_node *rn; | |
3969 | struct rib *rib; | |
3970 | struct rib *next; | |
3971 | int ret = 0; | |
3972 | ||
3973 | if (table) | |
3974 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3975 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3976 | { |
6d691129 PJ |
3977 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3978 | continue; | |
3979 | ||
718e3744 | 3980 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3981 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3982 | { | |
3983 | ret = rib_uninstall_kernel (rn, rib); | |
3984 | if (! ret) | |
4d38fdb4 | 3985 | rib_delnode (rn, rib); |
718e3744 | 3986 | } |
3987 | } | |
3988 | } | |
3989 | ||
3990 | /* Sweep all RIB tables. */ | |
3991 | void | |
a1ac18c4 | 3992 | rib_sweep_route (void) |
718e3744 | 3993 | { |
78104b9b FL |
3994 | vrf_iter_t iter; |
3995 | struct zebra_vrf *zvrf; | |
3996 | ||
3997 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3998 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3999 | { | |
4000 | rib_sweep_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
4001 | rib_sweep_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
4002 | } | |
718e3744 | 4003 | } |
2ea1ab1c VT |
4004 | |
4005 | /* Remove specific by protocol routes from 'table'. */ | |
4006 | static unsigned long | |
7c8ff89e | 4007 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
4008 | { |
4009 | struct route_node *rn; | |
4010 | struct rib *rib; | |
4011 | struct rib *next; | |
4012 | unsigned long n = 0; | |
4013 | ||
4014 | if (table) | |
4015 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 4016 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 4017 | { |
2ea1ab1c VT |
4018 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
4019 | continue; | |
7c8ff89e | 4020 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
4021 | { |
4022 | rib_delnode (rn, rib); | |
4023 | n++; | |
4024 | } | |
4025 | } | |
4026 | ||
4027 | return n; | |
4028 | } | |
4029 | ||
4030 | /* Remove specific by protocol routes. */ | |
4031 | unsigned long | |
7c8ff89e | 4032 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 4033 | { |
78104b9b FL |
4034 | vrf_iter_t iter; |
4035 | struct zebra_vrf *zvrf; | |
4036 | unsigned long cnt = 0; | |
4037 | ||
4038 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
4039 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
4040 | cnt += rib_score_proto_table (proto, instance, zvrf->table[AFI_IP][SAFI_UNICAST]) | |
4041 | +rib_score_proto_table (proto, instance, zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
4042 | ||
4043 | return cnt; | |
2ea1ab1c VT |
4044 | } |
4045 | ||
718e3744 | 4046 | /* Close RIB and clean up kernel routes. */ |
a31c5886 | 4047 | void |
718e3744 | 4048 | rib_close_table (struct route_table *table) |
4049 | { | |
4050 | struct route_node *rn; | |
416ec78d | 4051 | rib_table_info_t *info = table->info; |
718e3744 | 4052 | struct rib *rib; |
4053 | ||
4054 | if (table) | |
4055 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 4056 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 4057 | { |
9fd92e3c AS |
4058 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
4059 | continue; | |
4060 | ||
416ec78d DL |
4061 | if (info->safi == SAFI_UNICAST) |
4062 | zfpm_trigger_update (rn, NULL); | |
5adc2528 | 4063 | |
9fd92e3c AS |
4064 | if (! RIB_SYSTEM_ROUTE (rib)) |
4065 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 4066 | } |
718e3744 | 4067 | } |
4068 | ||
4069 | /* Close all RIB tables. */ | |
4070 | void | |
a1ac18c4 | 4071 | rib_close (void) |
718e3744 | 4072 | { |
78104b9b FL |
4073 | vrf_iter_t iter; |
4074 | struct zebra_vrf *zvrf; | |
4075 | struct listnode *node; | |
5c610faf | 4076 | struct interface *ifp; |
6678277c | 4077 | u_int32_t table_id; |
5c610faf | 4078 | |
78104b9b FL |
4079 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) |
4080 | { | |
4081 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
4082 | { | |
4083 | rib_close_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
4084 | rib_close_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
4085 | } | |
4086 | for (ALL_LIST_ELEMENTS_RO (vrf_iter2iflist (iter), node, ifp)) | |
4087 | if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp); | |
4088 | } | |
6678277c DS |
4089 | |
4090 | /* If we do multiple tables per vrf, need to move this to loop above */ | |
4091 | zvrf = vrf_info_lookup (VRF_DEFAULT); | |
4092 | ||
4093 | for (table_id = 0; table_id < ZEBRA_KERNEL_TABLE_MAX; table_id++) | |
4094 | { | |
4095 | if (zvrf->other_table[AFI_IP][table_id]) | |
4096 | rib_close_table (zvrf->other_table[AFI_IP][table_id]); | |
4097 | ||
4098 | if (zvrf->other_table[AFI_IP6][table_id]) | |
4099 | rib_close_table (zvrf->other_table[AFI_IP6][table_id]); | |
4100 | } | |
718e3744 | 4101 | } |
6b0655a2 | 4102 | |
718e3744 | 4103 | /* Routing information base initialize. */ |
4104 | void | |
a1ac18c4 | 4105 | rib_init (void) |
718e3744 | 4106 | { |
4d38fdb4 | 4107 | rib_queue_init (&zebrad); |
718e3744 | 4108 | } |
0915bb0c AS |
4109 | |
4110 | /* | |
4111 | * vrf_id_get_next | |
4112 | * | |
4113 | * Get the first vrf id that is greater than the given vrf id if any. | |
4114 | * | |
4115 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
4116 | */ | |
4117 | static inline int | |
b72ede27 | 4118 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 4119 | { |
b72ede27 FL |
4120 | vrf_iter_t iter = vrf_iterator (vrf_id); |
4121 | struct zebra_vrf *zvrf = vrf_iter2info (iter); | |
4122 | ||
4123 | /* The same one ? Then find out the next. */ | |
4124 | if (zvrf && (zvrf->vrf_id == vrf_id)) | |
4125 | zvrf = vrf_iter2info (vrf_next (iter)); | |
4126 | ||
4127 | if (zvrf) | |
0915bb0c | 4128 | { |
b72ede27 FL |
4129 | *next_id_p = zvrf->vrf_id; |
4130 | return 1; | |
0915bb0c AS |
4131 | } |
4132 | ||
4133 | return 0; | |
4134 | } | |
4135 | ||
4136 | /* | |
4137 | * rib_tables_iter_next | |
4138 | * | |
4139 | * Returns the next table in the iteration. | |
4140 | */ | |
4141 | struct route_table * | |
4142 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
4143 | { | |
4144 | struct route_table *table; | |
4145 | ||
4146 | /* | |
4147 | * Array that helps us go over all AFI/SAFI combinations via one | |
4148 | * index. | |
4149 | */ | |
4150 | static struct { | |
4151 | afi_t afi; | |
4152 | safi_t safi; | |
4153 | } afi_safis[] = { | |
4154 | { AFI_IP, SAFI_UNICAST }, | |
4155 | { AFI_IP, SAFI_MULTICAST }, | |
4156 | { AFI_IP6, SAFI_UNICAST }, | |
4157 | { AFI_IP6, SAFI_MULTICAST }, | |
4158 | }; | |
4159 | ||
4160 | table = NULL; | |
4161 | ||
4162 | switch (iter->state) | |
4163 | { | |
4164 | ||
4165 | case RIB_TABLES_ITER_S_INIT: | |
9c2bf1cf | 4166 | iter->vrf_id = VRF_DEFAULT; |
0915bb0c AS |
4167 | iter->afi_safi_ix = -1; |
4168 | ||
4169 | /* Fall through */ | |
4170 | ||
4171 | case RIB_TABLES_ITER_S_ITERATING: | |
4172 | iter->afi_safi_ix++; | |
4173 | while (1) | |
4174 | { | |
4175 | ||
4176 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
4177 | { | |
b72ede27 | 4178 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
4179 | afi_safis[iter->afi_safi_ix].safi, |
4180 | iter->vrf_id); | |
4181 | if (table) | |
4182 | break; | |
4183 | ||
4184 | iter->afi_safi_ix++; | |
4185 | } | |
4186 | ||
4187 | /* | |
4188 | * Found another table in this vrf. | |
4189 | */ | |
4190 | if (table) | |
4191 | break; | |
4192 | ||
4193 | /* | |
4194 | * Done with all tables in the current vrf, go to the next | |
4195 | * one. | |
4196 | */ | |
4197 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
4198 | break; | |
4199 | ||
4200 | iter->afi_safi_ix = 0; | |
4201 | } | |
4202 | ||
4203 | break; | |
4204 | ||
4205 | case RIB_TABLES_ITER_S_DONE: | |
4206 | return NULL; | |
4207 | } | |
4208 | ||
4209 | if (table) | |
4210 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4211 | else | |
4212 | iter->state = RIB_TABLES_ITER_S_DONE; | |
4213 | ||
4214 | return table; | |
4215 | } | |
b72ede27 | 4216 |