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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
b892f1dd | 24 | #include "if.h" |
718e3744 | 25 | #include "prefix.h" |
26 | #include "table.h" | |
27 | #include "memory.h" | |
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. */ |
28f6dde8 | 198 | 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 | 354 | nexthop->resolved = NULL; |
c50ca33a | 355 | rib->nexthop_mtu = 0; |
fa713d9e | 356 | } |
718e3744 | 357 | |
6e26278c DS |
358 | /* Skip nexthops that have been filtered out due to route-map */ |
359 | /* The nexthops are specific to this route and so the same */ | |
360 | /* nexthop for a different route may not have this flag set */ | |
361 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
362 | return 0; | |
363 | ||
d44ca835 DS |
364 | /* |
365 | * Check to see if we should trust the passed in information | |
366 | * for UNNUMBERED interfaces as that we won't find the GW | |
367 | * address in the routing table. | |
c8a1cb5c DS |
368 | */ |
369 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
370 | { | |
371 | ifp = if_lookup_by_index (nexthop->ifindex); | |
d44ca835 DS |
372 | if (ifp && connected_is_unnumbered(ifp)) |
373 | { | |
374 | if (if_is_operative(ifp)) | |
375 | return 1; | |
376 | else | |
377 | return 0; | |
378 | } | |
c8a1cb5c DS |
379 | else |
380 | return 0; | |
381 | } | |
382 | ||
718e3744 | 383 | /* Make lookup prefix. */ |
384 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
385 | p.family = AF_INET; | |
386 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
387 | p.prefix = nexthop->gate.ipv4; | |
388 | ||
389 | /* Lookup table. */ | |
78104b9b | 390 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 391 | if (! table) |
392 | return 0; | |
393 | ||
394 | rn = route_node_match (table, (struct prefix *) &p); | |
395 | while (rn) | |
396 | { | |
397 | route_unlock_node (rn); | |
398 | ||
a50c107e | 399 | /* If lookup self prefix return immediately. */ |
718e3744 | 400 | if (rn == top) |
401 | return 0; | |
402 | ||
403 | /* Pick up selected route. */ | |
18ff3edd DS |
404 | /* However, do not resolve over default route unless explicitly allowed. */ |
405 | if (is_default_prefix (&rn->p) && | |
406 | !nh_resolve_via_default (p.family)) | |
407 | return 0; | |
408 | ||
9fd92e3c | 409 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
410 | { |
411 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
412 | continue; | |
633e504d DS |
413 | |
414 | /* if the next hop is imported from another table, skip it */ | |
415 | if (match->type == ZEBRA_ROUTE_TABLE) | |
416 | continue; | |
16814f96 SH |
417 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) |
418 | break; | |
419 | } | |
718e3744 | 420 | |
421 | /* If there is no selected route or matched route is EGP, go up | |
422 | tree. */ | |
6e26278c | 423 | if (! match) |
718e3744 | 424 | { |
425 | do { | |
426 | rn = rn->parent; | |
427 | } while (rn && rn->info == NULL); | |
428 | if (rn) | |
429 | route_lock_node (rn); | |
430 | } | |
431 | else | |
432 | { | |
48a53dc7 CF |
433 | /* If the longest prefix match for the nexthop yields |
434 | * a blackhole, mark it as inactive. */ | |
435 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
436 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
437 | return 0; | |
438 | ||
718e3744 | 439 | if (match->type == ZEBRA_ROUTE_CONNECT) |
440 | { | |
441 | /* Directly point connected route. */ | |
442 | newhop = match->nexthop; | |
443 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV4) | |
444 | nexthop->ifindex = newhop->ifindex; | |
445 | ||
446 | return 1; | |
447 | } | |
22afbf94 | 448 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
718e3744 | 449 | { |
fa713d9e | 450 | resolved = 0; |
718e3744 | 451 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
452 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
453 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
454 | { | |
455 | if (set) | |
456 | { | |
457 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 458 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e CF |
459 | |
460 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
461 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
462 | /* If the resolving route specifies a gateway, use it */ |
463 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 464 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
c3e6b595 CF |
465 | { |
466 | resolved_hop->type = newhop->type; | |
467 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
468 | ||
469 | if (newhop->ifindex) | |
470 | { | |
471 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
472 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
473 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
474 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
c3e6b595 CF |
475 | } |
476 | } | |
477 | ||
478 | /* If the resolving route is an interface route, | |
479 | * it means the gateway we are looking up is connected | |
480 | * to that interface. (The actual network is _not_ onlink). | |
481 | * Therefore, the resolved route should have the original | |
482 | * gateway as nexthop as it is directly connected. | |
483 | * | |
484 | * On Linux, we have to set the onlink netlink flag because | |
485 | * otherwise, the kernel won't accept the route. */ | |
3ee39b5b | 486 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
487 | { |
488 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
489 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
490 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
491 | resolved_hop->ifindex = newhop->ifindex; | |
492 | } | |
fa713d9e | 493 | |
a399694f | 494 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
495 | } |
496 | resolved = 1; | |
497 | } | |
498 | return resolved; | |
499 | } | |
500 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
501 | { | |
502 | resolved = 0; | |
503 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
504 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
505 | { | |
506 | if (set) | |
507 | { | |
508 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
509 | ||
510 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
511 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
512 | /* If the resolving route specifies a gateway, use it */ | |
513 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 514 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
6e26278c DS |
515 | { |
516 | resolved_hop->type = newhop->type; | |
517 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
518 | ||
519 | if (newhop->ifindex) | |
520 | { | |
521 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
522 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
523 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
524 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
525 | } |
526 | } | |
527 | ||
528 | /* If the resolving route is an interface route, | |
529 | * it means the gateway we are looking up is connected | |
530 | * to that interface. (The actual network is _not_ onlink). | |
531 | * Therefore, the resolved route should have the original | |
532 | * gateway as nexthop as it is directly connected. | |
533 | * | |
534 | * On Linux, we have to set the onlink netlink flag because | |
535 | * otherwise, the kernel won't accept the route. | |
536 | */ | |
3ee39b5b | 537 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
538 | { |
539 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
540 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
541 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
542 | resolved_hop->ifindex = newhop->ifindex; | |
543 | } | |
544 | ||
a399694f | 545 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 546 | } |
fa713d9e | 547 | resolved = 1; |
718e3744 | 548 | } |
c50ca33a TT |
549 | if (resolved && set) |
550 | rib->nexthop_mtu = match->mtu; | |
fa713d9e | 551 | return resolved; |
718e3744 | 552 | } |
553 | else | |
554 | { | |
555 | return 0; | |
556 | } | |
557 | } | |
558 | } | |
559 | return 0; | |
560 | } | |
561 | ||
718e3744 | 562 | /* If force flag is not set, do not modify falgs at all for uninstall |
563 | the route from FIB. */ | |
a1ac18c4 | 564 | static int |
718e3744 | 565 | nexthop_active_ipv6 (struct rib *rib, struct nexthop *nexthop, int set, |
566 | struct route_node *top) | |
567 | { | |
568 | struct prefix_ipv6 p; | |
569 | struct route_table *table; | |
570 | struct route_node *rn; | |
571 | struct rib *match; | |
fa713d9e | 572 | int resolved; |
6e26278c DS |
573 | struct nexthop *newhop, *tnewhop; |
574 | int recursing = 0; | |
fa713d9e | 575 | struct nexthop *resolved_hop; |
718e3744 | 576 | |
577 | if (nexthop->type == NEXTHOP_TYPE_IPV6) | |
578 | nexthop->ifindex = 0; | |
579 | ||
580 | if (set) | |
fa713d9e CF |
581 | { |
582 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 583 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, nexthop->resolved, top); |
a399694f | 584 | nexthops_free(nexthop->resolved); |
fa713d9e CF |
585 | nexthop->resolved = NULL; |
586 | } | |
718e3744 | 587 | |
6e26278c DS |
588 | /* Skip nexthops that have been filtered out due to route-map */ |
589 | /* The nexthops are specific to this route and so the same */ | |
590 | /* nexthop for a different route may not have this flag set */ | |
591 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
592 | return 0; | |
593 | ||
718e3744 | 594 | /* Make lookup prefix. */ |
595 | memset (&p, 0, sizeof (struct prefix_ipv6)); | |
596 | p.family = AF_INET6; | |
597 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
598 | p.prefix = nexthop->gate.ipv6; | |
599 | ||
600 | /* Lookup table. */ | |
78104b9b | 601 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 602 | if (! table) |
603 | return 0; | |
604 | ||
605 | rn = route_node_match (table, (struct prefix *) &p); | |
606 | while (rn) | |
607 | { | |
608 | route_unlock_node (rn); | |
609 | ||
a50c107e | 610 | /* If lookup self prefix return immediately. */ |
718e3744 | 611 | if (rn == top) |
612 | return 0; | |
613 | ||
614 | /* Pick up selected route. */ | |
18ff3edd DS |
615 | /* However, do not resolve over default route unless explicitly allowed. */ |
616 | if (is_default_prefix (&rn->p) && | |
617 | !nh_resolve_via_default (p.family)) | |
618 | return 0; | |
619 | ||
9fd92e3c | 620 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
621 | { |
622 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
623 | continue; | |
624 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
625 | break; | |
626 | } | |
718e3744 | 627 | |
628 | /* If there is no selected route or matched route is EGP, go up | |
629 | tree. */ | |
6e26278c | 630 | if (! match) |
718e3744 | 631 | { |
632 | do { | |
633 | rn = rn->parent; | |
634 | } while (rn && rn->info == NULL); | |
635 | if (rn) | |
636 | route_lock_node (rn); | |
637 | } | |
638 | else | |
639 | { | |
48a53dc7 CF |
640 | /* If the longest prefix match for the nexthop yields |
641 | * a blackhole, mark it as inactive. */ | |
642 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
643 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
644 | return 0; | |
645 | ||
718e3744 | 646 | if (match->type == ZEBRA_ROUTE_CONNECT) |
647 | { | |
648 | /* Directly point connected route. */ | |
649 | newhop = match->nexthop; | |
650 | ||
651 | if (newhop && nexthop->type == NEXTHOP_TYPE_IPV6) | |
652 | nexthop->ifindex = newhop->ifindex; | |
653 | ||
654 | return 1; | |
655 | } | |
656 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) | |
657 | { | |
fa713d9e | 658 | resolved = 0; |
718e3744 | 659 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
660 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
661 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
6e26278c DS |
662 | { |
663 | if (set) | |
664 | { | |
665 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
666 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
667 | ||
668 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
669 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
670 | /* See nexthop_active_ipv4 for a description how the | |
671 | * resolved nexthop is constructed. */ | |
672 | if (newhop->type == NEXTHOP_TYPE_IPV6 | |
3ee39b5b | 673 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
6e26278c DS |
674 | { |
675 | resolved_hop->type = newhop->type; | |
676 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
677 | ||
678 | if (newhop->ifindex) | |
679 | { | |
680 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
681 | resolved_hop->ifindex = newhop->ifindex; | |
682 | } | |
683 | } | |
684 | ||
3ee39b5b | 685 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c DS |
686 | { |
687 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
688 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
689 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
690 | resolved_hop->ifindex = newhop->ifindex; | |
691 | } | |
692 | ||
a399694f | 693 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
694 | } |
695 | resolved = 1; | |
696 | } | |
697 | return resolved; | |
698 | } | |
699 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
700 | { | |
701 | resolved = 0; | |
702 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
703 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
718e3744 | 704 | { |
705 | if (set) | |
706 | { | |
707 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
fa713d9e CF |
708 | |
709 | resolved_hop = XCALLOC(MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
710 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
c3e6b595 CF |
711 | /* See nexthop_active_ipv4 for a description how the |
712 | * resolved nexthop is constructed. */ | |
718e3744 | 713 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
3ee39b5b | 714 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
c3e6b595 CF |
715 | { |
716 | resolved_hop->type = newhop->type; | |
717 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
718 | ||
719 | if (newhop->ifindex) | |
720 | { | |
721 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
722 | resolved_hop->ifindex = newhop->ifindex; | |
723 | } | |
724 | } | |
fa713d9e | 725 | |
3ee39b5b | 726 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 CF |
727 | { |
728 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
729 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
730 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
731 | resolved_hop->ifindex = newhop->ifindex; | |
732 | } | |
fa713d9e | 733 | |
a399694f | 734 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 735 | } |
fa713d9e | 736 | resolved = 1; |
718e3744 | 737 | } |
fa713d9e | 738 | return resolved; |
718e3744 | 739 | } |
740 | else | |
741 | { | |
742 | return 0; | |
743 | } | |
744 | } | |
745 | } | |
746 | return 0; | |
747 | } | |
718e3744 | 748 | |
749 | struct rib * | |
14364a31 DS |
750 | rib_match (afi_t afi, safi_t safi, vrf_id_t vrf_id, |
751 | union g_addr *addr, struct route_node **rn_out) | |
718e3744 | 752 | { |
14364a31 | 753 | struct prefix p; |
718e3744 | 754 | struct route_table *table; |
755 | struct route_node *rn; | |
756 | struct rib *match; | |
fa713d9e CF |
757 | struct nexthop *newhop, *tnewhop; |
758 | int recursing; | |
718e3744 | 759 | |
760 | /* Lookup table. */ | |
14364a31 | 761 | table = zebra_vrf_table (afi, safi, vrf_id); |
718e3744 | 762 | if (! table) |
763 | return 0; | |
764 | ||
14364a31 DS |
765 | memset (&p, 0, sizeof (struct prefix)); |
766 | p.family = afi; | |
767 | p.u.prefix = *(u_char *)addr; | |
718e3744 | 768 | p.prefixlen = IPV4_MAX_PREFIXLEN; |
14364a31 DS |
769 | if (afi == AFI_IP) |
770 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
771 | else | |
772 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
718e3744 | 773 | |
774 | rn = route_node_match (table, (struct prefix *) &p); | |
775 | ||
776 | while (rn) | |
777 | { | |
778 | route_unlock_node (rn); | |
779 | ||
780 | /* Pick up selected route. */ | |
9fd92e3c | 781 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
782 | { |
783 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
784 | continue; | |
785 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
786 | break; | |
787 | } | |
718e3744 | 788 | |
789 | /* If there is no selected route or matched route is EGP, go up | |
790 | tree. */ | |
6e26278c | 791 | if (! match) |
718e3744 | 792 | { |
793 | do { | |
794 | rn = rn->parent; | |
795 | } while (rn && rn->info == NULL); | |
796 | if (rn) | |
797 | route_lock_node (rn); | |
798 | } | |
799 | else | |
800 | { | |
33550aa8 | 801 | if (match->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 802 | { |
33550aa8 | 803 | int found = 0; |
fa713d9e | 804 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 805 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
33550aa8 DL |
806 | { |
807 | found = 1; | |
808 | break; | |
809 | } | |
810 | if (!found) | |
811 | return NULL; | |
718e3744 | 812 | } |
33550aa8 DL |
813 | |
814 | if (rn_out) | |
815 | *rn_out = rn; | |
816 | return match; | |
718e3744 | 817 | } |
818 | } | |
819 | return NULL; | |
820 | } | |
821 | ||
4623d897 DL |
822 | struct rib * |
823 | rib_match_ipv4_multicast (struct in_addr addr, struct route_node **rn_out) | |
824 | { | |
825 | struct rib *rib = NULL, *mrib = NULL, *urib = NULL; | |
826 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
14364a31 | 827 | union g_addr gaddr = { .ipv4 = addr }; |
4623d897 DL |
828 | |
829 | switch (ipv4_multicast_mode) | |
830 | { | |
831 | case MCAST_MRIB_ONLY: | |
14364a31 | 832 | return rib_match (AFI_IP, SAFI_MULTICAST, VRF_DEFAULT, &gaddr, rn_out); |
4623d897 | 833 | case MCAST_URIB_ONLY: |
14364a31 | 834 | return rib_match (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, &gaddr, rn_out); |
4623d897 DL |
835 | case MCAST_NO_CONFIG: |
836 | case MCAST_MIX_MRIB_FIRST: | |
14364a31 | 837 | rib = mrib = rib_match (AFI_IP, SAFI_MULTICAST, VRF_DEFAULT, &gaddr, &m_rn); |
4623d897 | 838 | if (!mrib) |
14364a31 | 839 | rib = urib = rib_match (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, &gaddr, &u_rn); |
4623d897 DL |
840 | break; |
841 | case MCAST_MIX_DISTANCE: | |
14364a31 DS |
842 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, VRF_DEFAULT, &gaddr, &m_rn); |
843 | urib = rib_match (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, &gaddr, &u_rn); | |
4623d897 DL |
844 | if (mrib && urib) |
845 | rib = urib->distance < mrib->distance ? urib : mrib; | |
846 | else if (mrib) | |
847 | rib = mrib; | |
848 | else if (urib) | |
849 | rib = urib; | |
850 | break; | |
851 | case MCAST_MIX_PFXLEN: | |
14364a31 DS |
852 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, VRF_DEFAULT, &gaddr, &m_rn); |
853 | urib = rib_match (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, &gaddr, &u_rn); | |
4623d897 DL |
854 | if (mrib && urib) |
855 | rib = u_rn->p.prefixlen > m_rn->p.prefixlen ? urib : mrib; | |
856 | else if (mrib) | |
857 | rib = mrib; | |
858 | else if (urib) | |
859 | rib = urib; | |
860 | break; | |
861 | } | |
862 | ||
863 | if (rn_out) | |
864 | *rn_out = (rib == mrib) ? m_rn : u_rn; | |
865 | ||
866 | if (IS_ZEBRA_DEBUG_RIB) | |
867 | { | |
868 | char buf[BUFSIZ]; | |
869 | inet_ntop (AF_INET, &addr, buf, BUFSIZ); | |
870 | ||
871 | zlog_debug("%s: %s: found %s, using %s", | |
872 | __func__, buf, | |
873 | mrib ? (urib ? "MRIB+URIB" : "MRIB") : | |
874 | urib ? "URIB" : "nothing", | |
875 | rib == urib ? "URIB" : rib == mrib ? "MRIB" : "none"); | |
876 | } | |
877 | return rib; | |
878 | } | |
879 | ||
880 | void | |
881 | multicast_mode_ipv4_set (enum multicast_mode mode) | |
882 | { | |
883 | if (IS_ZEBRA_DEBUG_RIB) | |
884 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, mode); | |
885 | ipv4_multicast_mode = mode; | |
886 | } | |
887 | ||
888 | enum multicast_mode | |
889 | multicast_mode_ipv4_get (void) | |
890 | { | |
891 | return ipv4_multicast_mode; | |
892 | } | |
893 | ||
718e3744 | 894 | struct rib * |
78104b9b | 895 | rib_lookup_ipv4 (struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 896 | { |
897 | struct route_table *table; | |
898 | struct route_node *rn; | |
899 | struct rib *match; | |
fa713d9e CF |
900 | struct nexthop *nexthop, *tnexthop; |
901 | int recursing; | |
718e3744 | 902 | |
903 | /* Lookup table. */ | |
78104b9b | 904 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 905 | if (! table) |
906 | return 0; | |
907 | ||
908 | rn = route_node_lookup (table, (struct prefix *) p); | |
909 | ||
910 | /* No route for this prefix. */ | |
911 | if (! rn) | |
912 | return NULL; | |
913 | ||
914 | /* Unlock node. */ | |
915 | route_unlock_node (rn); | |
916 | ||
9fd92e3c | 917 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
918 | { |
919 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
920 | continue; | |
921 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
922 | break; | |
923 | } | |
718e3744 | 924 | |
6e26278c | 925 | if (! match) |
718e3744 | 926 | return NULL; |
927 | ||
928 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
929 | return match; | |
930 | ||
fa713d9e | 931 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 932 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
933 | return match; | |
934 | ||
935 | return NULL; | |
936 | } | |
937 | ||
dc95824a DO |
938 | /* |
939 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
940 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
941 | * the whole RIB and has ZEBRA_FLAG_SELECTED set. | |
942 | * | |
943 | * Return values: | |
944 | * -1: error | |
945 | * 0: exact match found | |
946 | * 1: a match was found with a different gate | |
947 | * 2: connected route found | |
948 | * 3: no matches found | |
949 | */ | |
950 | int | |
78104b9b FL |
951 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate, |
952 | vrf_id_t vrf_id) | |
dc95824a DO |
953 | { |
954 | struct route_table *table; | |
955 | struct route_node *rn; | |
956 | struct rib *match; | |
fa713d9e CF |
957 | struct nexthop *nexthop, *tnexthop; |
958 | int recursing; | |
959 | int nexthops_active; | |
dc95824a DO |
960 | |
961 | /* Lookup table. */ | |
78104b9b | 962 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
963 | if (! table) |
964 | return ZEBRA_RIB_LOOKUP_ERROR; | |
965 | ||
966 | /* Scan the RIB table for exactly matching RIB entry. */ | |
967 | rn = route_node_lookup (table, (struct prefix *) p); | |
968 | ||
969 | /* No route for this prefix. */ | |
970 | if (! rn) | |
971 | return ZEBRA_RIB_NOTFOUND; | |
972 | ||
973 | /* Unlock node. */ | |
974 | route_unlock_node (rn); | |
975 | ||
976 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 977 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
978 | { |
979 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
980 | continue; | |
981 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_SELECTED)) | |
982 | break; | |
983 | } | |
dc95824a DO |
984 | |
985 | /* None such found :( */ | |
986 | if (!match) | |
987 | return ZEBRA_RIB_NOTFOUND; | |
988 | ||
989 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
990 | return ZEBRA_RIB_FOUND_CONNECTED; | |
991 | ||
992 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
993 | nexthops_active = 0; |
994 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 995 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 996 | { |
fa713d9e CF |
997 | nexthops_active = 1; |
998 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
999 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 1000 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
1001 | { |
1002 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
1003 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
1004 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
1005 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
1006 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
1007 | } | |
dc95824a | 1008 | } |
fa713d9e CF |
1009 | |
1010 | if (nexthops_active) | |
1011 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
1012 | |
1013 | return ZEBRA_RIB_NOTFOUND; | |
1014 | } | |
1015 | ||
7514fb77 PJ |
1016 | #define RIB_SYSTEM_ROUTE(R) \ |
1017 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
1018 | ||
dc95824a DO |
1019 | /* This function verifies reachability of one given nexthop, which can be |
1020 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1021 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
1022 | * nexthop->ifindex will be updated appropriately as well. | |
1023 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
1024 | * not vice versa. | |
1025 | * | |
1026 | * The return value is the final value of 'ACTIVE' flag. | |
1027 | */ | |
1028 | ||
d02c56cd | 1029 | static unsigned |
718e3744 | 1030 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
1031 | struct nexthop *nexthop, int set) | |
1032 | { | |
f3a1732e | 1033 | rib_table_info_t *info = rn->table->info; |
718e3744 | 1034 | struct interface *ifp; |
7514fb77 | 1035 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 1036 | int family; |
518f0eb1 | 1037 | char buf[INET6_ADDRSTRLEN+1]; |
718e3744 | 1038 | |
7a4bb9c5 DS |
1039 | if (rn->p.family == AF_INET) |
1040 | family = AFI_IP; | |
1041 | else if (rn->p.family == AF_INET6) | |
1042 | family = AFI_IP6; | |
1043 | else | |
1044 | family = 0; | |
718e3744 | 1045 | switch (nexthop->type) |
1046 | { | |
1047 | case NEXTHOP_TYPE_IFINDEX: | |
78104b9b | 1048 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1049 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1050 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1051 | else | |
1052 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1053 | break; | |
718e3744 | 1054 | case NEXTHOP_TYPE_IPV4: |
1055 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 1056 | family = AFI_IP; |
718e3744 | 1057 | if (nexthop_active_ipv4 (rib, nexthop, set, rn)) |
1058 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1059 | else | |
1060 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1061 | break; | |
718e3744 | 1062 | case NEXTHOP_TYPE_IPV6: |
7514fb77 | 1063 | family = AFI_IP6; |
718e3744 | 1064 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) |
1065 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1066 | else | |
1067 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1068 | break; | |
1069 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 1070 | /* RFC 5549, v4 prefix with v6 NH */ |
1071 | if (rn->p.family != AF_INET) | |
1072 | family = AFI_IP6; | |
718e3744 | 1073 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
1074 | { | |
78104b9b | 1075 | ifp = if_lookup_by_index_vrf (nexthop->ifindex, rib->vrf_id); |
3f087670 | 1076 | if (ifp && if_is_operative(ifp)) |
718e3744 | 1077 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1078 | else | |
1079 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1080 | } | |
1081 | else | |
1082 | { | |
1083 | if (nexthop_active_ipv6 (rib, nexthop, set, rn)) | |
1084 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1085 | else | |
1086 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1087 | } | |
1088 | break; | |
595db7f1 | 1089 | case NEXTHOP_TYPE_BLACKHOLE: |
1090 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1091 | break; | |
718e3744 | 1092 | default: |
1093 | break; | |
1094 | } | |
7514fb77 PJ |
1095 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1096 | return 0; | |
1097 | ||
f3a1732e CF |
1098 | /* XXX: What exactly do those checks do? Do we support |
1099 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 PJ |
1100 | if (RIB_SYSTEM_ROUTE(rib) || |
1101 | (family == AFI_IP && rn->p.family != AF_INET) || | |
1102 | (family == AFI_IP6 && rn->p.family != AF_INET6)) | |
1103 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1104 | ||
f3a1732e CF |
1105 | /* The original code didn't determine the family correctly |
1106 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1107 | * from the rib_table_info in those cases. | |
1108 | * Possibly it may be better to use only the rib_table_info | |
1109 | * in every case. | |
1110 | */ | |
1111 | if (!family) | |
1112 | family = info->afi; | |
1113 | ||
c52ef59f | 1114 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1115 | |
ca84c8ef | 1116 | /* It'll get set if required inside */ |
0032dd59 FL |
1117 | ret = zebra_route_map_check(family, rib->type, &rn->p, nexthop, rib->vrf_id, |
1118 | rib->tag); | |
7514fb77 | 1119 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1120 | { |
1121 | if (IS_ZEBRA_DEBUG_RIB) | |
1122 | { | |
1123 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, sizeof (buf)); | |
41ec9222 | 1124 | zlog_debug("%u:%s/%d: Filtering out with NH out %s due to route map", |
3ee39b5b DS |
1125 | rib->vrf_id, buf, rn->p.prefixlen, |
1126 | ifindex2ifname_vrf (nexthop->ifindex, rib->vrf_id)); | |
518f0eb1 DS |
1127 | } |
1128 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1129 | } | |
718e3744 | 1130 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1131 | } | |
1132 | ||
03e232a4 DO |
1133 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1134 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1135 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
2f97fa65 | 1136 | * is flagged with RIB_ENTRY_CHANGED. The 4th 'set' argument is |
03e232a4 DO |
1137 | * transparently passed to nexthop_active_check(). |
1138 | * | |
1139 | * Return value is the new number of active nexthops. | |
1140 | */ | |
1141 | ||
a1ac18c4 | 1142 | static int |
718e3744 | 1143 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1144 | { | |
1145 | struct nexthop *nexthop; | |
c52ef59f | 1146 | union g_addr prev_src; |
b892f1dd PJ |
1147 | unsigned int prev_active, new_active, old_num_nh; |
1148 | ifindex_t prev_index; | |
6e26278c | 1149 | old_num_nh = rib->nexthop_active_num; |
718e3744 | 1150 | |
1151 | rib->nexthop_active_num = 0; | |
2f97fa65 | 1152 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
718e3744 | 1153 | |
1154 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1155 | { |
c52ef59f DS |
1156 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1157 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1158 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1159 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1160 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1161 | rib->nexthop_active_num++; | |
c52ef59f | 1162 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1163 | if (prev_active != new_active || |
c52ef59f DS |
1164 | prev_index != nexthop->ifindex || |
1165 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1166 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1167 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1168 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1169 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1170 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c | 1171 | { |
2b50b603 | 1172 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c DS |
1173 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1174 | } | |
03e232a4 | 1175 | } |
6e26278c DS |
1176 | |
1177 | if (old_num_nh != rib->nexthop_active_num) | |
2b50b603 | 1178 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c | 1179 | |
2b50b603 | 1180 | if (CHECK_FLAG (rib->status, RIB_ENTRY_CHANGED)) |
6e26278c DS |
1181 | { |
1182 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1183 | } | |
1184 | ||
718e3744 | 1185 | return rib->nexthop_active_num; |
1186 | } | |
6baeb988 | 1187 | |
6b0655a2 | 1188 | |
718e3744 | 1189 | |
6ae24471 DS |
1190 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1191 | * is only used for IPv4. | |
1192 | */ | |
28f6dde8 | 1193 | int |
6ae24471 | 1194 | rib_install_kernel (struct route_node *rn, struct rib *rib, int update) |
718e3744 | 1195 | { |
1196 | int ret = 0; | |
fa713d9e | 1197 | struct nexthop *nexthop, *tnexthop; |
416ec78d | 1198 | rib_table_info_t *info = rn->table->info; |
fa713d9e | 1199 | int recursing; |
718e3744 | 1200 | |
416ec78d DL |
1201 | if (info->safi != SAFI_UNICAST) |
1202 | { | |
1203 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1204 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1205 | return ret; | |
1206 | } | |
1207 | ||
5adc2528 AS |
1208 | /* |
1209 | * Make sure we update the FPM any time we send new information to | |
1210 | * the kernel. | |
1211 | */ | |
1212 | zfpm_trigger_update (rn, "installing in kernel"); | |
718e3744 | 1213 | switch (PREFIX_FAMILY (&rn->p)) |
1214 | { | |
1215 | case AF_INET: | |
6ae24471 DS |
1216 | if (update) |
1217 | ret = kernel_update_ipv4 (&rn->p, rib); | |
1218 | else | |
1219 | ret = kernel_add_ipv4 (&rn->p, rib); | |
718e3744 | 1220 | break; |
718e3744 | 1221 | case AF_INET6: |
dccc5225 | 1222 | if (update) |
1223 | ret = kernel_update_ipv6 (&rn->p, rib); | |
1224 | else | |
1225 | ret = kernel_add_ipv6 (&rn->p, rib); | |
718e3744 | 1226 | break; |
718e3744 | 1227 | } |
1228 | ||
3e5c6e00 | 1229 | /* If install succeeds, update FIB flag for nexthops. */ |
1230 | if (!ret) | |
718e3744 | 1231 | { |
fa713d9e | 1232 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1233 | { |
1234 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1235 | continue; | |
1236 | ||
1237 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1238 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1239 | else | |
1240 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1241 | } | |
718e3744 | 1242 | } |
3e5c6e00 | 1243 | |
1244 | return ret; | |
718e3744 | 1245 | } |
1246 | ||
1247 | /* Uninstall the route from kernel. */ | |
28f6dde8 | 1248 | int |
718e3744 | 1249 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
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, "uninstalling from kernel"); | |
1268 | ||
718e3744 | 1269 | switch (PREFIX_FAMILY (&rn->p)) |
1270 | { | |
1271 | case AF_INET: | |
1272 | ret = kernel_delete_ipv4 (&rn->p, rib); | |
1273 | break; | |
718e3744 | 1274 | case AF_INET6: |
1275 | ret = kernel_delete_ipv6 (&rn->p, rib); | |
1276 | break; | |
718e3744 | 1277 | } |
1278 | ||
fa713d9e | 1279 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1280 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1281 | ||
1282 | return ret; | |
1283 | } | |
1284 | ||
1285 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1286 | static void |
718e3744 | 1287 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1288 | { | |
416ec78d DL |
1289 | rib_table_info_t *info = rn->table->info; |
1290 | ||
718e3744 | 1291 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
1292 | { | |
416ec78d DL |
1293 | if (info->safi == SAFI_UNICAST) |
1294 | zfpm_trigger_update (rn, "rib_uninstall"); | |
5adc2528 | 1295 | |
718e3744 | 1296 | redistribute_delete (&rn->p, rib); |
1297 | if (! RIB_SYSTEM_ROUTE (rib)) | |
1298 | rib_uninstall_kernel (rn, rib); | |
1299 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); | |
1300 | } | |
1301 | } | |
1302 | ||
6d691129 PJ |
1303 | static void rib_unlink (struct route_node *, struct rib *); |
1304 | ||
9fd92e3c AS |
1305 | /* |
1306 | * rib_can_delete_dest | |
1307 | * | |
1308 | * Returns TRUE if the given dest can be deleted from the table. | |
1309 | */ | |
1310 | static int | |
1311 | rib_can_delete_dest (rib_dest_t *dest) | |
1312 | { | |
1313 | if (dest->routes) | |
1314 | { | |
1315 | return 0; | |
1316 | } | |
1317 | ||
5adc2528 AS |
1318 | /* |
1319 | * Don't delete the dest if we have to update the FPM about this | |
1320 | * prefix. | |
1321 | */ | |
1322 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1323 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1324 | return 0; | |
1325 | ||
9fd92e3c AS |
1326 | return 1; |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * rib_gc_dest | |
1331 | * | |
1332 | * Garbage collect the rib dest corresponding to the given route node | |
1333 | * if appropriate. | |
1334 | * | |
1335 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1336 | */ | |
1337 | int | |
1338 | rib_gc_dest (struct route_node *rn) | |
1339 | { | |
1340 | rib_dest_t *dest; | |
41ec9222 | 1341 | struct zebra_vrf *zvrf; |
9fd92e3c AS |
1342 | |
1343 | dest = rib_dest_from_rnode (rn); | |
1344 | if (!dest) | |
1345 | return 0; | |
1346 | ||
1347 | if (!rib_can_delete_dest (dest)) | |
1348 | return 0; | |
1349 | ||
41ec9222 | 1350 | zvrf = rib_dest_vrf (dest); |
2263a412 DL |
1351 | if (IS_ZEBRA_DEBUG_RIB) |
1352 | rnode_debug (rn, zvrf->vrf_id, "removing dest from table"); | |
9fd92e3c AS |
1353 | |
1354 | dest->rnode = NULL; | |
1355 | XFREE (MTYPE_RIB_DEST, dest); | |
1356 | rn->info = NULL; | |
1357 | ||
1358 | /* | |
1359 | * Release the one reference that we keep on the route node. | |
1360 | */ | |
1361 | route_unlock_node (rn); | |
1362 | return 1; | |
1363 | } | |
1364 | ||
3e5c6e00 | 1365 | static void |
1366 | rib_process_add_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1367 | struct rib *select) | |
1368 | { | |
1369 | char buf[INET6_ADDRSTRLEN]; | |
1370 | int installed = 1; | |
1371 | ||
1372 | zfpm_trigger_update (rn, "new route selected"); | |
1373 | ||
1374 | /* Update real nexthop. This may actually determine if nexthop is active or not. */ | |
1375 | if (!nexthop_active_update (rn, select, 1)) | |
1376 | { | |
2b50b603 | 1377 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1378 | return; |
1379 | } | |
1380 | ||
1381 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1382 | if (IS_ZEBRA_DEBUG_RIB) | |
1383 | { | |
1384 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1385 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1386 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1387 | } | |
1388 | ||
1389 | if (!RIB_SYSTEM_ROUTE (select)) | |
1390 | { | |
1391 | if (rib_install_kernel (rn, select, 0)) | |
1392 | { | |
1393 | installed = 0; | |
fb02523b DS |
1394 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1395 | zlog_warn ("%u:%s/%d: Route install failed", | |
1396 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1397 | } |
1398 | } | |
1399 | ||
1400 | /* Update for redistribution. */ | |
1401 | if (installed) | |
1402 | redistribute_update (&rn->p, select, NULL); | |
2b50b603 | 1403 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1404 | } |
1405 | ||
1406 | static void | |
1407 | rib_process_del_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1408 | struct rib *fib) | |
1409 | { | |
1410 | char buf[INET6_ADDRSTRLEN]; | |
1411 | ||
1412 | zfpm_trigger_update (rn, "removing existing route"); | |
1413 | ||
1414 | /* Withdraw redistribute and uninstall from kernel. */ | |
1415 | if (IS_ZEBRA_DEBUG_RIB) | |
1416 | { | |
1417 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1418 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1419 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1420 | } | |
1421 | ||
1422 | redistribute_delete(&rn->p, fib); | |
1423 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1424 | rib_uninstall_kernel (rn, fib); | |
1425 | ||
1426 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1427 | ||
1428 | /* Update nexthop for route, reset changed flag. */ | |
1429 | nexthop_active_update (rn, fib, 1); | |
2b50b603 | 1430 | UNSET_FLAG(fib->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1431 | } |
1432 | ||
1433 | static void | |
1434 | rib_process_update_route (struct zebra_vrf *zvrf, struct route_node *rn, | |
1435 | struct rib *select, struct rib *fib) | |
1436 | { | |
1437 | char buf[INET6_ADDRSTRLEN]; | |
1438 | struct nexthop *nexthop = NULL, *tnexthop; | |
1439 | int recursing; | |
1440 | int nh_active = 0; | |
1441 | int installed = 1; | |
1442 | ||
1443 | if (IS_ZEBRA_DEBUG_RIB) | |
1444 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1445 | ||
1446 | /* | |
1447 | * We have to install or update if a new route has been selected or | |
1448 | * something has changed. | |
1449 | */ | |
1450 | if (select != fib || | |
2b50b603 | 1451 | CHECK_FLAG (select->status, RIB_ENTRY_CHANGED)) |
3e5c6e00 | 1452 | { |
1453 | zfpm_trigger_update (rn, "updating existing route"); | |
1454 | ||
1455 | /* Update the nexthop; we could determine here that nexthop is inactive. */ | |
1456 | if (nexthop_active_update (rn, select, 1)) | |
1457 | nh_active = 1; | |
1458 | ||
1459 | /* If nexthop is active, install the selected route, if appropriate. If | |
1460 | * the install succeeds, cleanup flags for prior route, if different from | |
1461 | * newly selected. | |
1462 | */ | |
1463 | if (nh_active) | |
1464 | { | |
1465 | if (IS_ZEBRA_DEBUG_RIB) | |
1466 | { | |
1467 | if (select != fib) | |
1468 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1469 | "old %p (type %d)", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1470 | rn, select, select->type, fib, fib->type); | |
1471 | else | |
1472 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1473 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1474 | } | |
1475 | /* Non-system route should be installed. */ | |
1476 | if (!RIB_SYSTEM_ROUTE (select)) | |
1477 | { | |
1478 | if (rib_install_kernel (rn, select, 1)) | |
1479 | { | |
1480 | installed = 0; | |
fb02523b DS |
1481 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
1482 | zlog_warn ("%u:%s/%d: Route install failed", | |
1483 | zvrf->vrf_id, buf, rn->p.prefixlen); | |
3e5c6e00 | 1484 | } |
1485 | } | |
1486 | ||
1487 | /* If install succeeded or system route, cleanup flags for prior route. */ | |
1488 | if (installed && select != fib) | |
1489 | { | |
1490 | if (RIB_SYSTEM_ROUTE(select)) | |
1491 | { | |
1492 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1493 | rib_uninstall_kernel (rn, fib); | |
1494 | } | |
1495 | else | |
1496 | { | |
1497 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1498 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1499 | } | |
3e5c6e00 | 1500 | } |
1501 | ||
1502 | /* Update for redistribution. */ | |
1503 | if (installed) | |
1504 | { | |
1505 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1506 | redistribute_update (&rn->p, select, (select == fib) ? NULL : fib); | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * If nexthop for selected route is not active or install failed, we | |
1512 | * may need to uninstall and delete for redistribution. | |
1513 | */ | |
1514 | if (!nh_active || !installed) | |
1515 | { | |
1516 | struct rib *del; | |
1517 | ||
1518 | if (IS_ZEBRA_DEBUG_RIB) | |
1519 | { | |
1520 | if (select != fib) | |
1521 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1522 | "old %p (type %d) - %s", zvrf->vrf_id, buf, rn->p.prefixlen, | |
1523 | rn, select, select->type, fib, fib->type, | |
1524 | nh_active ? "install failed" : "nexthop inactive"); | |
1525 | else | |
1526 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) - %s", | |
1527 | zvrf->vrf_id, buf, rn->p.prefixlen, rn, select, select->type, | |
1528 | nh_active ? "install failed" : "nexthop inactive"); | |
1529 | } | |
1530 | ||
1531 | del = (select == fib) ? select : fib; | |
1532 | ||
1533 | redistribute_delete(&rn->p, del); | |
1534 | ||
1535 | if (!RIB_SYSTEM_ROUTE (del)) | |
1536 | rib_uninstall_kernel (rn, del); | |
1537 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); | |
1538 | } | |
1539 | } | |
1540 | else | |
1541 | { | |
1542 | /* | |
1543 | * Same route selected; check if in the FIB and if not, re-install. This | |
1544 | * is housekeeping code to deal with race conditions in kernel with linux | |
1545 | * netlink reporting interface up before IPv4 or IPv6 protocol is ready | |
1546 | * to add routes. | |
1547 | */ | |
1548 | if (!RIB_SYSTEM_ROUTE (select)) | |
1549 | { | |
1550 | int in_fib = 0; | |
1551 | ||
1552 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) | |
1553 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1554 | { | |
1555 | in_fib = 1; | |
1556 | break; | |
1557 | } | |
1558 | if (!in_fib) | |
1559 | rib_install_kernel (rn, select, 0); | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | /* Update prior route. */ | |
1564 | if (select != fib) | |
1565 | { | |
1566 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
1567 | ||
1568 | /* Set real nexthop. */ | |
1569 | nexthop_active_update (rn, fib, 1); | |
2b50b603 | 1570 | UNSET_FLAG(fib->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1571 | } |
1572 | ||
1573 | /* Clear changed flag. */ | |
2b50b603 | 1574 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1575 | } |
1576 | ||
718e3744 | 1577 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1578 | static void |
1579 | rib_process (struct route_node *rn) | |
718e3744 | 1580 | { |
1581 | struct rib *rib; | |
1582 | struct rib *next; | |
1583 | struct rib *fib = NULL; | |
1584 | struct rib *select = NULL; | |
6d691129 | 1585 | struct rib *del = NULL; |
f304cb48 | 1586 | char buf[INET6_ADDRSTRLEN]; |
41ec9222 | 1587 | rib_dest_t *dest; |
1588 | struct zebra_vrf *zvrf = NULL; | |
58255d34 | 1589 | vrf_id_t vrf_id = VRF_UNKNOWN; |
7498d58d | 1590 | rib_table_info_t *info; |
41ec9222 | 1591 | |
4d38fdb4 | 1592 | assert (rn); |
7498d58d | 1593 | info = rn->table->info; |
4d38fdb4 | 1594 | |
41ec9222 | 1595 | dest = rib_dest_from_rnode (rn); |
1596 | if (dest) | |
1597 | { | |
1598 | zvrf = rib_dest_vrf (dest); | |
1599 | vrf_id = zvrf->vrf_id; | |
1600 | } | |
1601 | ||
1602 | if (IS_ZEBRA_DEBUG_RIB) | |
f304cb48 | 1603 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); |
93bdadae | 1604 | |
41ec9222 | 1605 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1606 | zlog_debug ("%u:%s/%d: Processing rn %p", vrf_id, buf, rn->p.prefixlen, rn); | |
1607 | ||
9fd92e3c | 1608 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1609 | { |
41ec9222 | 1610 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1611 | zlog_debug ("%u:%s/%d: Examine rib %p (type %d) status %x flags %x " | |
1612 | "dist %d metric %d", | |
1613 | vrf_id, buf, rn->p.prefixlen, rib, rib->type, rib->status, | |
1614 | rib->flags, rib->distance, rib->metric); | |
1615 | ||
6e26278c DS |
1616 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1617 | ||
718e3744 | 1618 | /* Currently installed rib. */ |
1619 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
6d691129 PJ |
1620 | { |
1621 | assert (fib == NULL); | |
1622 | fib = rib; | |
1623 | } | |
ca657c65 | 1624 | |
6d691129 PJ |
1625 | /* Unlock removed routes, so they'll be freed, bar the FIB entry, |
1626 | * which we need to do do further work with below. | |
1627 | */ | |
1628 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1629 | { | |
1630 | if (rib != fib) | |
1631 | { | |
1632 | if (IS_ZEBRA_DEBUG_RIB) | |
6c4f4e6e DL |
1633 | rnode_debug (rn, vrf_id, "rn %p, removing rib %p", |
1634 | (void *)rn, (void *)rib); | |
9fd92e3c | 1635 | rib_unlink (rn, rib); |
6d691129 PJ |
1636 | } |
1637 | else | |
1638 | del = rib; | |
1639 | ||
1640 | continue; | |
1641 | } | |
4d38fdb4 | 1642 | |
718e3744 | 1643 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1644 | /* This first call to nexthop_active_update is merely to determine if |
1645 | * there's any change to nexthops associated with this RIB entry. Now, | |
1646 | * rib_process() can be invoked due to an external event such as link | |
1647 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1648 | * a decision has already been made that the NHs have changed. So, no | |
1649 | * need to invoke a potentially expensive call again. Further, since | |
1650 | * the change might be in a recursive NH which is not caught in | |
1651 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1652 | * recursive NHs. | |
6e26278c | 1653 | */ |
2b50b603 | 1654 | if (!CHECK_FLAG(rib->status, RIB_ENTRY_CHANGED) && |
f857321e DW |
1655 | ! nexthop_active_update (rn, rib, 0)) |
1656 | { | |
1657 | if (rib->type == ZEBRA_ROUTE_TABLE) | |
1658 | { | |
1659 | /* This entry was denied by the 'ip protocol table' route-map, we | |
1660 | * need to delete it */ | |
1661 | if (rib != fib) | |
1662 | { | |
1663 | if (IS_ZEBRA_DEBUG_RIB) | |
1664 | zlog_debug ("%s: %s/%d: imported via import-table but denied " | |
1665 | "by the ip protocol table route-map", | |
1666 | __func__, buf, rn->p.prefixlen); | |
1667 | rib_unlink (rn, rib); | |
1668 | } | |
1669 | else | |
1670 | del = rib; | |
1671 | } | |
1672 | ||
1673 | continue; | |
1674 | } | |
718e3744 | 1675 | |
7498d58d B |
1676 | if (info->safi == SAFI_MULTICAST) |
1677 | continue; | |
1678 | ||
f857321e | 1679 | /* Infinite distance. */ |
718e3744 | 1680 | if (rib->distance == DISTANCE_INFINITY) |
8733ba72 | 1681 | { |
2b50b603 | 1682 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1683 | continue; |
1684 | } | |
718e3744 | 1685 | |
af887b51 | 1686 | /* Newly selected rib, the common case. */ |
1687 | if (!select) | |
1688 | { | |
1689 | select = rib; | |
1690 | continue; | |
1691 | } | |
1692 | ||
1693 | /* filter route selection in following order: | |
af887b51 | 1694 | * - connected beats other types |
a8d9c1f9 | 1695 | * - lower distance beats higher |
af887b51 | 1696 | * - lower metric beats higher for equal distance |
1697 | * - last, hence oldest, route wins tie break. | |
1698 | */ | |
a1038a15 | 1699 | |
1700 | /* Connected routes. Pick the last connected | |
1701 | * route of the set of lowest metric connected routes. | |
1702 | */ | |
a8d9c1f9 | 1703 | if (rib->type == ZEBRA_ROUTE_CONNECT) |
1704 | { | |
a1038a15 | 1705 | if (select->type != ZEBRA_ROUTE_CONNECT |
a8d9c1f9 | 1706 | || rib->metric <= select->metric) |
8733ba72 | 1707 | { |
2b50b603 | 1708 | UNSET_FLAG (select->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1709 | select = rib; |
1710 | } | |
1711 | else | |
2b50b603 | 1712 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
a1038a15 | 1713 | continue; |
a8d9c1f9 | 1714 | } |
1715 | else if (select->type == ZEBRA_ROUTE_CONNECT) | |
8733ba72 | 1716 | { |
2b50b603 | 1717 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1718 | continue; |
1719 | } | |
a8d9c1f9 | 1720 | |
1721 | /* higher distance loses */ | |
1722 | if (rib->distance > select->distance) | |
8733ba72 | 1723 | { |
2b50b603 | 1724 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1725 | continue; |
1726 | } | |
a8d9c1f9 | 1727 | |
1728 | /* lower wins */ | |
1729 | if (rib->distance < select->distance) | |
1730 | { | |
2b50b603 | 1731 | UNSET_FLAG (select->status, RIB_ENTRY_CHANGED); |
af887b51 | 1732 | select = rib; |
a8d9c1f9 | 1733 | continue; |
1734 | } | |
1735 | ||
1736 | /* metric tie-breaks equal distance */ | |
1737 | if (rib->metric <= select->metric) | |
8733ba72 | 1738 | { |
2b50b603 | 1739 | UNSET_FLAG (select->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1740 | select = rib; |
1741 | } | |
9fd92e3c | 1742 | } /* RNODE_FOREACH_RIB_SAFE */ |
dc95824a DO |
1743 | |
1744 | /* After the cycle is finished, the following pointers will be set: | |
1745 | * select --- the winner RIB entry, if any was found, otherwise NULL | |
1746 | * fib --- the SELECTED RIB entry, if any, otherwise NULL | |
1747 | * del --- equal to fib, if fib is queued for deletion, NULL otherwise | |
1748 | * rib --- NULL | |
1749 | */ | |
41ec9222 | 1750 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1751 | zlog_debug ("%u:%s/%d: After processing: select %p fib %p del %p", | |
1752 | vrf_id, buf, rn->p.prefixlen, select, fib, del); | |
dc95824a DO |
1753 | |
1754 | /* Same RIB entry is selected. Update FIB and finish. */ | |
3e5c6e00 | 1755 | if (select && select == fib) |
1756 | rib_process_update_route (zvrf, rn, select, select); | |
1757 | else if (select && fib) | |
1758 | rib_process_update_route (zvrf, rn, select, fib); | |
1759 | else if (select) | |
1760 | rib_process_add_route (zvrf, rn, select); | |
1761 | else if (fib) | |
1762 | rib_process_del_route (zvrf, rn, fib); | |
1763 | ||
1764 | #if 0 | |
718e3744 | 1765 | if (select && select == fib) |
1766 | { | |
2263a412 DL |
1767 | if (IS_ZEBRA_DEBUG_RIB) |
1768 | rnode_debug (rn, vrf_id, "Updating existing route, select %p, fib %p", | |
6c4f4e6e | 1769 | (void *)select, (void *)fib); |
2f97fa65 | 1770 | if (CHECK_FLAG (select->status, RIB_ENTRY_CHANGED)) |
4d38fdb4 | 1771 | { |
416ec78d DL |
1772 | if (info->safi == SAFI_UNICAST) |
1773 | zfpm_trigger_update (rn, "updating existing route"); | |
5adc2528 | 1774 | |
4d38fdb4 | 1775 | /* Set real nexthop. */ |
6e26278c DS |
1776 | /* Need to check if any NHs are active to clear the |
1777 | * the selected flag | |
1778 | */ | |
1779 | if (nexthop_active_update (rn, select, 1)) | |
1780 | { | |
41ec9222 | 1781 | if (IS_ZEBRA_DEBUG_RIB) |
1782 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d)", | |
1783 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
dccc5225 | 1784 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1785 | { |
dccc5225 | 1786 | /* Clear FIB flag if performing a replace, will get set again |
1787 | * as part of install. | |
1788 | */ | |
6ae24471 DS |
1789 | for (nexthop = select->nexthop; nexthop; nexthop = nexthop->next) |
1790 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
dccc5225 | 1791 | rib_install_kernel (rn, select, 1); |
6ae24471 | 1792 | } |
5048fe14 | 1793 | |
1794 | /* assuming that the receiver knows how to dedup */ | |
c41fc67b | 1795 | redistribute_update (&rn->p, select, NULL); |
6e26278c DS |
1796 | } |
1797 | else | |
1798 | { | |
41ec9222 | 1799 | if (IS_ZEBRA_DEBUG_RIB) |
1800 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1801 | "- nexthop inactive", | |
1802 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1803 | ||
5048fe14 | 1804 | /* Withdraw unreachable redistribute route */ |
1805 | redistribute_delete(&rn->p, select); | |
1806 | ||
dccc5225 | 1807 | /* Do the uninstall here, if not done earlier. */ |
1808 | if (! RIB_SYSTEM_ROUTE (select)) | |
6ae24471 | 1809 | rib_uninstall_kernel (rn, select); |
6e26278c DS |
1810 | UNSET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
1811 | } | |
2b50b603 | 1812 | UNSET_FLAG (select->status, RIB_ENTRY_CHANGED); |
6e26278c | 1813 | } |
d753e9ee | 1814 | else if (! RIB_SYSTEM_ROUTE (select)) |
4d38fdb4 | 1815 | { |
1816 | /* Housekeeping code to deal with | |
1817 | race conditions in kernel with linux | |
1818 | netlink reporting interface up before IPv4 or IPv6 protocol | |
1819 | is ready to add routes. | |
1820 | This makes sure the routes are IN the kernel. | |
1821 | */ | |
1822 | ||
fa713d9e | 1823 | for (ALL_NEXTHOPS_RO(select->nexthop, nexthop, tnexthop, recursing)) |
a3aaf5b0 | 1824 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
4d38fdb4 | 1825 | { |
a3aaf5b0 DO |
1826 | installed = 1; |
1827 | break; | |
4d38fdb4 | 1828 | } |
1829 | if (! installed) | |
6ae24471 | 1830 | rib_install_kernel (rn, select, 0); |
4d38fdb4 | 1831 | } |
6d691129 | 1832 | goto end; |
718e3744 | 1833 | } |
1834 | ||
dc95824a DO |
1835 | /* At this point we either haven't found the best RIB entry or it is |
1836 | * different from what we currently intend to flag with SELECTED. In both | |
1837 | * cases, if a RIB block is present in FIB, it should be withdrawn. | |
1838 | */ | |
718e3744 | 1839 | if (fib) |
1840 | { | |
2263a412 | 1841 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 1842 | rnode_debug (rn, vrf_id, "Removing existing route, fib %p", (void *)fib); |
2263a412 | 1843 | |
416ec78d DL |
1844 | if (info->safi == SAFI_UNICAST) |
1845 | zfpm_trigger_update (rn, "removing existing route"); | |
5adc2528 | 1846 | |
dccc5225 | 1847 | /* If there's no route to replace this with, withdraw redistribute and |
1848 | * uninstall from kernel. | |
1849 | */ | |
5048fe14 | 1850 | if (!select) |
6ae24471 | 1851 | { |
41ec9222 | 1852 | if (IS_ZEBRA_DEBUG_RIB) |
1853 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d)", | |
1854 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1855 | ||
dccc5225 | 1856 | redistribute_delete(&rn->p, fib); |
1857 | if (! RIB_SYSTEM_ROUTE (fib)) | |
1858 | rib_uninstall_kernel (rn, fib); | |
6ae24471 | 1859 | } |
dccc5225 | 1860 | |
718e3744 | 1861 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); |
1862 | ||
1863 | /* Set real nexthop. */ | |
1864 | nexthop_active_update (rn, fib, 1); | |
2b50b603 | 1865 | UNSET_FLAG(fib->status, RIB_ENTRY_CHANGED); |
718e3744 | 1866 | } |
1867 | ||
dc95824a DO |
1868 | /* Regardless of some RIB entry being SELECTED or not before, now we can |
1869 | * tell, that if a new winner exists, FIB is still not updated with this | |
1870 | * data, but ready to be. | |
1871 | */ | |
718e3744 | 1872 | if (select) |
1873 | { | |
2263a412 | 1874 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 1875 | rnode_debug (rn, "Adding route, select %p", (void *)select); |
2263a412 | 1876 | |
416ec78d DL |
1877 | if (info->safi == SAFI_UNICAST) |
1878 | zfpm_trigger_update (rn, "new route selected"); | |
5adc2528 | 1879 | |
718e3744 | 1880 | /* Set real nexthop. */ |
6e26278c DS |
1881 | if (nexthop_active_update (rn, select, 1)) |
1882 | { | |
41ec9222 | 1883 | if (IS_ZEBRA_DEBUG_RIB) |
1884 | { | |
1885 | if (fib) | |
1886 | zlog_debug ("%u:%s/%d: Updating route rn %p, rib %p (type %d) " | |
1887 | "old %p (type %d)", vrf_id, buf, rn->p.prefixlen, rn, | |
1888 | select, select->type, fib, fib->type); | |
1889 | else | |
1890 | zlog_debug ("%u:%s/%d: Adding route rn %p, rib %p (type %d)", | |
1891 | vrf_id, buf, rn->p.prefixlen, rn, select, select->type); | |
1892 | } | |
1893 | ||
dccc5225 | 1894 | if (! RIB_SYSTEM_ROUTE (select)) |
6ae24471 | 1895 | { |
dccc5225 | 1896 | /* Clear FIB flag if performing a replace, will get set again |
1897 | * as part of install. | |
1898 | */ | |
1899 | if (fib) | |
1900 | { | |
1901 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
1902 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1903 | } | |
1904 | rib_install_kernel (rn, select, fib? 1 : 0); | |
6ae24471 | 1905 | } |
0b560feb | 1906 | else |
1907 | { | |
1908 | /* Uninstall prior route here, if needed. */ | |
1909 | if (fib && !RIB_SYSTEM_ROUTE (fib)) | |
1910 | rib_uninstall_kernel (rn, fib); | |
1911 | } | |
dccc5225 | 1912 | |
6e26278c | 1913 | SET_FLAG (select->flags, ZEBRA_FLAG_SELECTED); |
5048fe14 | 1914 | /* Unconditionally announce, this part is exercised by new routes */ |
c41fc67b | 1915 | /* If we cannot add, for example route added is learnt by the */ |
1916 | /* protocol we're trying to redistribute to, delete the redist */ | |
1917 | /* This is notified by setting the is_update to 1 */ | |
1918 | redistribute_update (&rn->p, select, fib); | |
6e26278c | 1919 | } |
6ae24471 DS |
1920 | else |
1921 | { | |
41ec9222 | 1922 | /* Uninstall prior route here and do redist delete, if needed. */ |
a219b295 | 1923 | if (fib) |
41ec9222 | 1924 | { |
1925 | if (IS_ZEBRA_DEBUG_RIB) | |
1926 | zlog_debug ("%u:%s/%d: Deleting route rn %p, rib %p (type %d) " | |
1927 | "- nexthop inactive", | |
1928 | vrf_id, buf, rn->p.prefixlen, rn, fib, fib->type); | |
1929 | ||
1930 | if (!RIB_SYSTEM_ROUTE (fib)) | |
1931 | rib_uninstall_kernel (rn, fib); | |
1932 | redistribute_delete(&rn->p, fib); | |
1933 | } | |
6ae24471 | 1934 | } |
2b50b603 | 1935 | UNSET_FLAG(select->status, RIB_ENTRY_CHANGED); |
718e3744 | 1936 | } |
3e5c6e00 | 1937 | #endif |
4d38fdb4 | 1938 | |
6d691129 PJ |
1939 | /* FIB route was removed, should be deleted */ |
1940 | if (del) | |
1941 | { | |
1942 | if (IS_ZEBRA_DEBUG_RIB) | |
6c4f4e6e | 1943 | rnode_debug (rn, vrf_id, "Deleting fib %p, rn %p", (void *)del, (void *)rn); |
6d691129 PJ |
1944 | rib_unlink (rn, del); |
1945 | } | |
4d38fdb4 | 1946 | |
9fd92e3c AS |
1947 | /* |
1948 | * Check if the dest can be deleted now. | |
1949 | */ | |
1950 | rib_gc_dest (rn); | |
e96f9203 DO |
1951 | } |
1952 | ||
5110a0c6 SH |
1953 | /* Take a list of route_node structs and return 1, if there was a record |
1954 | * picked from it and processed by rib_process(). Don't process more, | |
1955 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1956 | */ |
ef9b113e | 1957 | static unsigned int |
e96f9203 DO |
1958 | process_subq (struct list * subq, u_char qindex) |
1959 | { | |
5110a0c6 | 1960 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1961 | struct route_node *rnode; |
41ec9222 | 1962 | char buf[INET6_ADDRSTRLEN]; |
1963 | rib_dest_t *dest; | |
1964 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 SH |
1965 | |
1966 | if (!lnode) | |
e96f9203 | 1967 | return 0; |
5110a0c6 | 1968 | |
e96f9203 | 1969 | rnode = listgetdata (lnode); |
41ec9222 | 1970 | dest = rib_dest_from_rnode (rnode); |
1971 | if (dest) | |
1972 | zvrf = rib_dest_vrf (dest); | |
1973 | ||
e96f9203 | 1974 | rib_process (rnode); |
5110a0c6 | 1975 | |
41ec9222 | 1976 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1977 | { | |
1978 | inet_ntop (rnode->p.family, &rnode->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
1979 | zlog_debug ("%u:%s/%d: rn %p dequeued from sub-queue %u", | |
1980 | zvrf ? zvrf->vrf_id : 0, buf, rnode->p.prefixlen, rnode, qindex); | |
1981 | } | |
1982 | ||
9fd92e3c AS |
1983 | if (rnode->info) |
1984 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1985 | ||
67b9467f | 1986 | #if 0 |
5110a0c6 SH |
1987 | else |
1988 | { | |
1989 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1990 | __func__, rnode, rnode->lock); | |
1991 | zlog_backtrace(LOG_DEBUG); | |
1992 | } | |
67b9467f | 1993 | #endif |
e96f9203 DO |
1994 | route_unlock_node (rnode); |
1995 | list_delete_node (subq, lnode); | |
1996 | return 1; | |
1997 | } | |
1998 | ||
fb018d25 DS |
1999 | /* |
2000 | * All meta queues have been processed. Trigger next-hop evaluation. | |
2001 | */ | |
2002 | static void | |
2003 | meta_queue_process_complete (struct work_queue *dummy) | |
2004 | { | |
9ec6b0bb | 2005 | vrf_iter_t iter; |
2006 | struct zebra_vrf *zvrf; | |
2007 | ||
2008 | /* Evaluate nexthops for those VRFs which underwent route processing. This | |
2009 | * should limit the evaluation to the necessary VRFs in most common | |
2010 | * situations. | |
2011 | */ | |
2012 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
2013 | { | |
2014 | if (((zvrf = vrf_iter2info (iter)) != NULL) && | |
2015 | (zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
2016 | { | |
2017 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
2018 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); | |
2019 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
2020 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); | |
2021 | zebra_evaluate_rnh(zvrf->vrf_id, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
2022 | } | |
2023 | } | |
fb018d25 DS |
2024 | } |
2025 | ||
e96f9203 DO |
2026 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
2027 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
2028 | * is pointed to the meta queue structure. | |
2029 | */ | |
2030 | static wq_item_status | |
2031 | meta_queue_process (struct work_queue *dummy, void *data) | |
2032 | { | |
2033 | struct meta_queue * mq = data; | |
5110a0c6 SH |
2034 | unsigned i; |
2035 | ||
e96f9203 DO |
2036 | for (i = 0; i < MQ_SIZE; i++) |
2037 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
2038 | { |
2039 | mq->size--; | |
2040 | break; | |
2041 | } | |
e96f9203 DO |
2042 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
2043 | } | |
2044 | ||
9fd92e3c AS |
2045 | /* |
2046 | * Map from rib types to queue type (priority) in meta queue | |
2047 | */ | |
5110a0c6 SH |
2048 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
2049 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
2050 | [ZEBRA_ROUTE_KERNEL] = 0, | |
2051 | [ZEBRA_ROUTE_CONNECT] = 0, | |
2052 | [ZEBRA_ROUTE_STATIC] = 1, | |
2053 | [ZEBRA_ROUTE_RIP] = 2, | |
2054 | [ZEBRA_ROUTE_RIPNG] = 2, | |
2055 | [ZEBRA_ROUTE_OSPF] = 2, | |
2056 | [ZEBRA_ROUTE_OSPF6] = 2, | |
2057 | [ZEBRA_ROUTE_ISIS] = 2, | |
2058 | [ZEBRA_ROUTE_BGP] = 3, | |
2059 | [ZEBRA_ROUTE_HSLS] = 4, | |
7a4bb9c5 | 2060 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
2061 | }; |
2062 | ||
2063 | /* Look into the RN and queue it into one or more priority queues, | |
2064 | * increasing the size for each data push done. | |
e96f9203 | 2065 | */ |
ef9b113e SH |
2066 | static void |
2067 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 2068 | { |
e96f9203 | 2069 | struct rib *rib; |
5110a0c6 | 2070 | |
9fd92e3c | 2071 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 2072 | { |
5110a0c6 | 2073 | u_char qindex = meta_queue_map[rib->type]; |
9ec6b0bb | 2074 | struct zebra_vrf *zvrf; |
5110a0c6 SH |
2075 | |
2076 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
2077 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
2078 | RIB_ROUTE_QUEUED (qindex))) | |
2263a412 DL |
2079 | { |
2080 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2081 | rnode_debug (rn, rib->vrf_id, "rn %p is already queued in sub-queue %u", | |
6c4f4e6e | 2082 | (void *)rn, qindex); |
2263a412 DL |
2083 | continue; |
2084 | } | |
5110a0c6 | 2085 | |
9fd92e3c | 2086 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
2087 | listnode_add (mq->subq[qindex], rn); |
2088 | route_lock_node (rn); | |
2089 | mq->size++; | |
2090 | ||
41ec9222 | 2091 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2092 | rnode_debug (rn, rib->vrf_id, "queued rn %p into sub-queue %u", |
6c4f4e6e | 2093 | (void *)rn, qindex); |
9ec6b0bb | 2094 | |
2095 | zvrf = zebra_vrf_lookup (rib->vrf_id); | |
2096 | if (zvrf) | |
2097 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
e96f9203 | 2098 | } |
4d38fdb4 | 2099 | } |
2100 | ||
6d691129 | 2101 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 2102 | void |
44e9909d | 2103 | rib_queue_add (struct route_node *rn) |
4d38fdb4 | 2104 | { |
44e9909d | 2105 | assert (rn); |
4d38fdb4 | 2106 | |
fc328ac9 | 2107 | /* Pointless to queue a route_node with no RIB entries to add or remove */ |
9fd92e3c | 2108 | if (!rnode_to_ribs (rn)) |
6d691129 | 2109 | { |
fc328ac9 | 2110 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
6c4f4e6e | 2111 | __func__, (void *)rn, rn->lock); |
fc328ac9 SV |
2112 | zlog_backtrace(LOG_DEBUG); |
2113 | return; | |
2114 | } | |
2115 | ||
44e9909d | 2116 | if (zebrad.ribq == NULL) |
fc328ac9 SV |
2117 | { |
2118 | zlog_err ("%s: work_queue does not exist!", __func__); | |
2119 | return; | |
4d38fdb4 | 2120 | } |
4d38fdb4 | 2121 | |
cc2dd928 SH |
2122 | /* |
2123 | * The RIB queue should normally be either empty or holding the only | |
2124 | * work_queue_item element. In the latter case this element would | |
2125 | * hold a pointer to the meta queue structure, which must be used to | |
2126 | * actually queue the route nodes to process. So create the MQ | |
2127 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
2128 | * This semantics was introduced after 0.99.9 release. |
2129 | */ | |
44e9909d DS |
2130 | if (!zebrad.ribq->items->count) |
2131 | work_queue_add (zebrad.ribq, zebrad.mq); | |
e96f9203 | 2132 | |
44e9909d | 2133 | rib_meta_queue_add (zebrad.mq, rn); |
fc328ac9 | 2134 | |
fc328ac9 | 2135 | return; |
4d38fdb4 | 2136 | } |
2137 | ||
5110a0c6 SH |
2138 | /* Create new meta queue. |
2139 | A destructor function doesn't seem to be necessary here. | |
2140 | */ | |
ef9b113e SH |
2141 | static struct meta_queue * |
2142 | meta_queue_new (void) | |
e96f9203 DO |
2143 | { |
2144 | struct meta_queue *new; | |
5110a0c6 SH |
2145 | unsigned i; |
2146 | ||
2147 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
2148 | assert(new); | |
e96f9203 | 2149 | |
e96f9203 | 2150 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
2151 | { |
2152 | new->subq[i] = list_new (); | |
2153 | assert(new->subq[i]); | |
2154 | } | |
2155 | ||
e96f9203 DO |
2156 | return new; |
2157 | } | |
2158 | ||
4d38fdb4 | 2159 | /* initialise zebra rib work queue */ |
a1ac18c4 | 2160 | static void |
4d38fdb4 | 2161 | rib_queue_init (struct zebra_t *zebra) |
2162 | { | |
fc328ac9 SV |
2163 | assert (zebra); |
2164 | ||
4d38fdb4 | 2165 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 2166 | "route_node processing"))) |
4d38fdb4 | 2167 | { |
6d691129 | 2168 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 2169 | return; |
2170 | } | |
2171 | ||
2172 | /* fill in the work queue spec */ | |
e96f9203 | 2173 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2174 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2175 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2176 | /* XXX: TODO: These should be runtime configurable via vty */ |
2177 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2178 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2179 | |
e96f9203 | 2180 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2181 | { |
e96f9203 | 2182 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2183 | return; |
2184 | } | |
2185 | return; | |
718e3744 | 2186 | } |
2187 | ||
6d691129 PJ |
2188 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2189 | * | |
2190 | * The queue length is bounded by the maximal size of the routing table, | |
2191 | * as a route_node will not be requeued, if already queued. | |
2192 | * | |
3c0755dc | 2193 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
bcd548ff | 2194 | * state, or static_install_route (when an existing RIB is updated) |
3c0755dc PJ |
2195 | * and then submit route_node to queue for best-path selection later. |
2196 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2197 | * |
2198 | * Deleted RIBs are reaped during best-path selection. | |
2199 | * | |
2200 | * rib_addnode | |
2201 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2202 | * |-------->| | best RIB, if required |
2203 | * | | | |
2204 | * static_install->|->rib_addqueue...... -> rib_process | |
2205 | * | | | |
2206 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2207 | * |-> set RIB_ENTRY_REMOVE | |
2208 | * rib_delnode (RIB freed) | |
2209 | * | |
9fd92e3c AS |
2210 | * The 'info' pointer of a route_node points to a rib_dest_t |
2211 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2212 | * dest is created on-demand by rib_link() and is kept around at least | |
2213 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2214 | * |
2215 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2216 | * | |
2217 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2218 | * - dest attached to route_node: |
2219 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2220 | * - route_node processing queue |
2221 | * - managed by: rib_addqueue, rib_process. | |
2222 | * | |
2223 | */ | |
2224 | ||
718e3744 | 2225 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2226 | static void |
2bf26d41 | 2227 | rib_link (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2228 | { |
2229 | struct rib *head; | |
9fd92e3c | 2230 | rib_dest_t *dest; |
7a4bb9c5 | 2231 | afi_t afi; |
8902474b | 2232 | const char *rmap_name; |
9fd92e3c | 2233 | |
4d38fdb4 | 2234 | assert (rib && rn); |
2235 | ||
9fd92e3c AS |
2236 | dest = rib_dest_from_rnode (rn); |
2237 | if (!dest) | |
6d691129 | 2238 | { |
41ec9222 | 2239 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2240 | rnode_debug (rn, rib->vrf_id, "rn %p adding dest", rn); |
9fd92e3c AS |
2241 | |
2242 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2243 | route_lock_node (rn); /* rn route table reference */ | |
2244 | rn->info = dest; | |
2245 | dest->rnode = rn; | |
2246 | } | |
2247 | ||
2248 | head = dest->routes; | |
2249 | if (head) | |
2250 | { | |
6d691129 | 2251 | head->prev = rib; |
6d691129 | 2252 | } |
718e3744 | 2253 | rib->next = head; |
9fd92e3c | 2254 | dest->routes = rib; |
7a4bb9c5 | 2255 | |
12f6fb97 DS |
2256 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2257 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2258 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
8902474b DS |
2259 | { |
2260 | rmap_name = zebra_get_import_table_route_map (afi, rib->table); | |
2261 | zebra_add_import_table_entry(rn, rib, rmap_name); | |
2262 | } | |
7a4bb9c5 | 2263 | else |
12f6fb97 | 2264 | if (process) |
44e9909d | 2265 | rib_queue_add (rn); |
718e3744 | 2266 | } |
2267 | ||
28f6dde8 | 2268 | void |
2bf26d41 | 2269 | rib_addnode (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2270 | { |
6d691129 PJ |
2271 | /* RIB node has been un-removed before route-node is processed. |
2272 | * route_node must hence already be on the queue for processing.. | |
2273 | */ | |
2274 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2275 | { | |
2263a412 | 2276 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2277 | rnode_debug (rn, rib->vrf_id, "rn %p, un-removed rib %p", (void *)rn, (void *)rib); |
2263a412 | 2278 | |
6d691129 PJ |
2279 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2280 | return; | |
2281 | } | |
2bf26d41 | 2282 | rib_link (rn, rib, process); |
6d691129 PJ |
2283 | } |
2284 | ||
9fd92e3c AS |
2285 | /* |
2286 | * rib_unlink | |
2287 | * | |
2288 | * Detach a rib structure from a route_node. | |
2289 | * | |
2290 | * Note that a call to rib_unlink() should be followed by a call to | |
2291 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2292 | * longer required to be deleted. | |
2293 | */ | |
6d691129 PJ |
2294 | static void |
2295 | rib_unlink (struct route_node *rn, struct rib *rib) | |
2296 | { | |
9fd92e3c | 2297 | rib_dest_t *dest; |
6d691129 | 2298 | |
4d38fdb4 | 2299 | assert (rn && rib); |
6d691129 | 2300 | |
2263a412 | 2301 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2302 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p", (void *)rn, (void *)rib); |
2263a412 | 2303 | |
9fd92e3c AS |
2304 | dest = rib_dest_from_rnode (rn); |
2305 | ||
718e3744 | 2306 | if (rib->next) |
2307 | rib->next->prev = rib->prev; | |
6d691129 | 2308 | |
718e3744 | 2309 | if (rib->prev) |
2310 | rib->prev->next = rib->next; | |
2311 | else | |
6d691129 | 2312 | { |
9fd92e3c | 2313 | dest->routes = rib->next; |
6d691129 PJ |
2314 | } |
2315 | ||
2316 | /* free RIB and nexthops */ | |
d82ae0de | 2317 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, rib->nexthop, rn); |
a399694f | 2318 | nexthops_free(rib->nexthop); |
6d691129 PJ |
2319 | XFREE (MTYPE_RIB, rib); |
2320 | ||
6d691129 PJ |
2321 | } |
2322 | ||
28f6dde8 | 2323 | void |
6d691129 PJ |
2324 | rib_delnode (struct route_node *rn, struct rib *rib) |
2325 | { | |
7a4bb9c5 DS |
2326 | afi_t afi; |
2327 | ||
2263a412 | 2328 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2329 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p, removing", (void *)rn, (void *)rib); |
6d691129 | 2330 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 | 2331 | |
12f6fb97 DS |
2332 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2333 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2334 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
7a4bb9c5 | 2335 | { |
12f6fb97 | 2336 | zebra_del_import_table_entry(rn, rib); |
7a4bb9c5 | 2337 | /* Just clean up if non main table */ |
41ec9222 | 2338 | if (IS_ZEBRA_DEBUG_RIB) |
2339 | { | |
2340 | char buf[INET6_ADDRSTRLEN]; | |
2341 | if (IS_ZEBRA_DEBUG_RIB) | |
2342 | { | |
2343 | inet_ntop (rn->p.family, &rn->p.u.prefix, buf, INET6_ADDRSTRLEN); | |
2344 | zlog_debug ("%u:%s/%d: Freeing route rn %p, rib %p (type %d)", | |
2345 | rib->vrf_id, buf, rn->p.prefixlen, rn, rib, rib->type); | |
2346 | } | |
2347 | } | |
2348 | ||
7a4bb9c5 DS |
2349 | rib_unlink(rn, rib); |
2350 | } | |
12f6fb97 DS |
2351 | else |
2352 | { | |
44e9909d | 2353 | rib_queue_add (rn); |
12f6fb97 | 2354 | } |
718e3744 | 2355 | } |
2356 | ||
dc95824a DO |
2357 | /* This function dumps the contents of a given RIB entry into |
2358 | * standard debug log. Calling function name and IP prefix in | |
2359 | * question are passed as 1st and 2nd arguments. | |
2360 | */ | |
2361 | ||
f7bf4153 DL |
2362 | void _rib_dump (const char * func, |
2363 | union prefix46constptr pp, const struct rib * rib) | |
dc95824a | 2364 | { |
f7bf4153 | 2365 | const struct prefix *p = pp.p; |
35d921cc | 2366 | char straddr[PREFIX_STRLEN]; |
fa713d9e CF |
2367 | struct nexthop *nexthop, *tnexthop; |
2368 | int recursing; | |
dc95824a | 2369 | |
6c4f4e6e | 2370 | zlog_debug ("%s: dumping RIB entry %p for %s vrf %u", func, (const void *)rib, |
78104b9b | 2371 | prefix2str(pp, straddr, sizeof(straddr)), rib->vrf_id); |
dc95824a DO |
2372 | zlog_debug |
2373 | ( | |
7c8ff89e | 2374 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2375 | func, |
2376 | rib->refcnt, | |
d02c56cd | 2377 | (unsigned long) rib->uptime, |
dc95824a | 2378 | rib->type, |
7c8ff89e | 2379 | rib->instance, |
dc95824a DO |
2380 | rib->table |
2381 | ); | |
2382 | zlog_debug | |
2383 | ( | |
c50ca33a | 2384 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", |
dc95824a DO |
2385 | func, |
2386 | rib->metric, | |
c50ca33a | 2387 | rib->mtu, |
dc95824a DO |
2388 | rib->distance, |
2389 | rib->flags, | |
2390 | rib->status | |
2391 | ); | |
2392 | zlog_debug | |
2393 | ( | |
2394 | "%s: nexthop_num == %u, nexthop_active_num == %u, nexthop_fib_num == %u", | |
2395 | func, | |
2396 | rib->nexthop_num, | |
2397 | rib->nexthop_active_num, | |
2398 | rib->nexthop_fib_num | |
2399 | ); | |
fed643f4 | 2400 | |
fa713d9e CF |
2401 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2402 | { | |
fed643f4 | 2403 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2404 | zlog_debug |
2405 | ( | |
2406 | "%s: %s %s with flags %s%s%s", | |
2407 | func, | |
2408 | (recursing ? " NH" : "NH"), | |
2409 | straddr, | |
2410 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2411 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2412 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2413 | ); | |
2414 | } | |
dc95824a DO |
2415 | zlog_debug ("%s: dump complete", func); |
2416 | } | |
2417 | ||
2418 | /* This is an exported helper to rtm_read() to dump the strange | |
2419 | * RIB entry found by rib_lookup_ipv4_route() | |
2420 | */ | |
2421 | ||
12f6fb97 | 2422 | void rib_lookup_and_dump (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
dc95824a DO |
2423 | { |
2424 | struct route_table *table; | |
2425 | struct route_node *rn; | |
2426 | struct rib *rib; | |
2427 | char prefix_buf[INET_ADDRSTRLEN]; | |
2428 | ||
2429 | /* Lookup table. */ | |
12f6fb97 | 2430 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
2431 | if (! table) |
2432 | { | |
b72ede27 | 2433 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2434 | return; |
2435 | } | |
2436 | ||
dc95824a DO |
2437 | /* Scan the RIB table for exactly matching RIB entry. */ |
2438 | rn = route_node_lookup (table, (struct prefix *) p); | |
2439 | ||
2440 | /* No route for this prefix. */ | |
2441 | if (! rn) | |
2442 | { | |
35d921cc TT |
2443 | zlog_debug ("%s: lookup failed for %s", __func__, |
2444 | prefix2str((struct prefix*) p, prefix_buf, sizeof(prefix_buf))); | |
dc95824a DO |
2445 | return; |
2446 | } | |
2447 | ||
2448 | /* Unlock node. */ | |
2449 | route_unlock_node (rn); | |
2450 | ||
2451 | /* let's go */ | |
9fd92e3c | 2452 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2453 | { |
2454 | zlog_debug | |
2455 | ( | |
2456 | "%s: rn %p, rib %p: %s, %s", | |
2457 | __func__, | |
6c4f4e6e DL |
2458 | (void *)rn, |
2459 | (void *)rib, | |
dc95824a DO |
2460 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), |
2461 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2462 | ); | |
f7bf4153 | 2463 | rib_dump (p, rib); |
dc95824a DO |
2464 | } |
2465 | } | |
2466 | ||
20e5ff0a DO |
2467 | /* Check if requested address assignment will fail due to another |
2468 | * route being installed by zebra in FIB already. Take necessary | |
2469 | * actions, if needed: remove such a route from FIB and deSELECT | |
2470 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2471 | */ | |
12f6fb97 | 2472 | void rib_lookup_and_pushup (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
20e5ff0a DO |
2473 | { |
2474 | struct route_table *table; | |
2475 | struct route_node *rn; | |
2476 | struct rib *rib; | |
2477 | unsigned changed = 0; | |
2478 | ||
12f6fb97 | 2479 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id))) |
20e5ff0a | 2480 | { |
b72ede27 | 2481 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2482 | return; |
2483 | } | |
2484 | ||
2485 | /* No matches would be the simplest case. */ | |
2486 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2487 | return; | |
2488 | ||
2489 | /* Unlock node. */ | |
2490 | route_unlock_node (rn); | |
2491 | ||
2492 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2493 | * the RN into RIBQ head. If the routing message about the new connected | |
2494 | * route (generated by the IP address we are going to assign very soon) | |
2495 | * comes before the RIBQ is processed, the new RIB entry will join | |
2496 | * RIBQ record already on head. This is necessary for proper revalidation | |
2497 | * of the rest of the RIB. | |
2498 | */ | |
9fd92e3c | 2499 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a DO |
2500 | { |
2501 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) && | |
2502 | ! RIB_SYSTEM_ROUTE (rib)) | |
2503 | { | |
2504 | changed = 1; | |
2505 | if (IS_ZEBRA_DEBUG_RIB) | |
2506 | { | |
35d921cc TT |
2507 | char buf[PREFIX_STRLEN]; |
2508 | zlog_debug ("%u:%s: freeing way for connected prefix", | |
2509 | rib->vrf_id, prefix2str(&rn->p, buf, sizeof(buf))); | |
f7bf4153 | 2510 | rib_dump (&rn->p, rib); |
20e5ff0a DO |
2511 | } |
2512 | rib_uninstall (rn, rib); | |
2513 | } | |
2514 | } | |
2515 | if (changed) | |
44e9909d | 2516 | rib_queue_add (rn); |
20e5ff0a DO |
2517 | } |
2518 | ||
718e3744 | 2519 | int |
cddf391b | 2520 | rib_add_ipv4_multipath (struct prefix_ipv4 *p, struct rib *rib, safi_t safi) |
718e3744 | 2521 | { |
2522 | struct route_table *table; | |
2523 | struct route_node *rn; | |
2524 | struct rib *same; | |
2525 | struct nexthop *nexthop; | |
04b02fda | 2526 | int ret = 0; |
4d38fdb4 | 2527 | |
718e3744 | 2528 | /* Lookup table. */ |
ca46a78e | 2529 | table = zebra_vrf_table_with_table_id (AFI_IP, safi, rib->vrf_id, rib->table); |
718e3744 | 2530 | if (! table) |
2531 | return 0; | |
cddf391b | 2532 | |
718e3744 | 2533 | /* Make it sure prefixlen is applied to the prefix. */ |
2534 | apply_mask_ipv4 (p); | |
2535 | ||
2536 | /* Set default distance by route type. */ | |
2537 | if (rib->distance == 0) | |
2538 | { | |
2539 | rib->distance = route_info[rib->type].distance; | |
2540 | ||
2541 | /* iBGP distance is 200. */ | |
2542 | if (rib->type == ZEBRA_ROUTE_BGP | |
2543 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2544 | rib->distance = 200; | |
2545 | } | |
2546 | ||
2547 | /* Lookup route node.*/ | |
2548 | rn = route_node_get (table, (struct prefix *) p); | |
2549 | ||
2550 | /* If same type of route are installed, treat it as a implicit | |
2551 | withdraw. */ | |
9fd92e3c | 2552 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2553 | { |
0b8c4f1d | 2554 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2555 | continue; |
2556 | ||
7c8ff89e DS |
2557 | if (same->type == rib->type && same->instance == rib->instance |
2558 | && same->table == rib->table | |
718e3744 | 2559 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2560 | break; |
718e3744 | 2561 | } |
4d38fdb4 | 2562 | |
718e3744 | 2563 | /* If this route is kernel route, set FIB flag to the route. */ |
2564 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2565 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2566 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2567 | ||
2568 | /* Link new rib to node.*/ | |
41ec9222 | 2569 | if (IS_ZEBRA_DEBUG_RIB) |
2570 | { | |
2571 | char buf[INET6_ADDRSTRLEN]; | |
2572 | if (IS_ZEBRA_DEBUG_RIB) | |
2573 | { | |
2574 | inet_ntop (p->family, &p->prefix, buf, INET6_ADDRSTRLEN); | |
2575 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
2576 | "existing %p", | |
6c4f4e6e DL |
2577 | rib->vrf_id, buf, p->prefixlen, (void *)rn, |
2578 | (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2579 | } |
2580 | ||
2581 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2582 | rib_dump ((struct prefix *)p, rib); | |
2583 | } | |
2bf26d41 | 2584 | rib_addnode (rn, rib, 1); |
04b02fda | 2585 | ret = 1; |
718e3744 | 2586 | |
718e3744 | 2587 | /* Free implicit route.*/ |
2588 | if (same) | |
dc95824a | 2589 | { |
41ec9222 | 2590 | rib_delnode (rn, same); |
2591 | ret = -1; | |
dc95824a | 2592 | } |
4d38fdb4 | 2593 | |
2594 | route_unlock_node (rn); | |
04b02fda | 2595 | return ret; |
718e3744 | 2596 | } |
2597 | ||
2598 | int | |
616368ed DS |
2599 | rib_delete (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance, |
2600 | int flags, struct prefix *p, union g_addr *gate, ifindex_t ifindex, | |
2601 | u_int32_t table_id) | |
718e3744 | 2602 | { |
2603 | struct route_table *table; | |
2604 | struct route_node *rn; | |
2605 | struct rib *rib; | |
2606 | struct rib *fib = NULL; | |
2607 | struct rib *same = NULL; | |
fa713d9e CF |
2608 | struct nexthop *nexthop, *tnexthop; |
2609 | int recursing; | |
35d921cc | 2610 | char buf1[PREFIX_STRLEN]; |
41ec9222 | 2611 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 2612 | |
2613 | /* Lookup table. */ | |
616368ed | 2614 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2615 | if (! table) |
2616 | return 0; | |
2617 | ||
2618 | /* Apply mask. */ | |
616368ed | 2619 | apply_mask (p); |
718e3744 | 2620 | |
2621 | /* Lookup route node. */ | |
616368ed | 2622 | rn = route_node_lookup (table, p); |
718e3744 | 2623 | if (! rn) |
2624 | { | |
41ec9222 | 2625 | if (IS_ZEBRA_DEBUG_RIB) |
35d921cc TT |
2626 | zlog_debug ("%u:%s: doesn't exist in rib", |
2627 | vrf_id, prefix2str (p, buf1, sizeof(buf1))); | |
718e3744 | 2628 | return ZEBRA_ERR_RTNOEXIST; |
2629 | } | |
2630 | ||
2631 | /* Lookup same type route. */ | |
9fd92e3c | 2632 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2633 | { |
6d691129 PJ |
2634 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2635 | continue; | |
2636 | ||
718e3744 | 2637 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
2638 | fib = rib; | |
2639 | ||
ebf1ead0 | 2640 | if (rib->type != type) |
2641 | continue; | |
7c8ff89e DS |
2642 | if (rib->instance != instance) |
2643 | continue; | |
ebf1ead0 | 2644 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2645 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2646 | { |
4f1735fd MF |
2647 | if (nexthop->ifindex != ifindex) |
2648 | continue; | |
ebf1ead0 | 2649 | if (rib->refcnt) |
718e3744 | 2650 | { |
ebf1ead0 | 2651 | rib->refcnt--; |
2652 | route_unlock_node (rn); | |
2653 | route_unlock_node (rn); | |
2654 | return 0; | |
718e3744 | 2655 | } |
ebf1ead0 | 2656 | same = rib; |
2657 | break; | |
718e3744 | 2658 | } |
ebf1ead0 | 2659 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2660 | else |
5ec90d28 | 2661 | { |
fa713d9e CF |
2662 | if (gate == NULL) |
2663 | { | |
2664 | same = rib; | |
2665 | break; | |
2666 | } | |
2667 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
616368ed DS |
2668 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || |
2669 | IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
fa713d9e CF |
2670 | { |
2671 | same = rib; | |
2672 | break; | |
2673 | } | |
2674 | if (same) | |
2675 | break; | |
2676 | } | |
718e3744 | 2677 | } |
718e3744 | 2678 | /* If same type of route can't be found and this message is from |
2679 | kernel. */ | |
2680 | if (! same) | |
2681 | { | |
2037f143 DS |
2682 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2683 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2684 | { | |
41ec9222 | 2685 | if (IS_ZEBRA_DEBUG_RIB) |
2037f143 | 2686 | { |
616368ed | 2687 | zlog_debug ("%u:%s: rn %p, rib %p (type %d) was deleted " |
41ec9222 | 2688 | "from kernel, adding", |
616368ed DS |
2689 | vrf_id, prefix2str(p, buf1, INET6_ADDRSTRLEN), |
2690 | rn, fib, fib->type); | |
2037f143 | 2691 | } |
6baf7bb8 DS |
2692 | if (allow_delete) |
2693 | { | |
2694 | /* Unset flags. */ | |
2695 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2696 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2697 | ||
2698 | UNSET_FLAG (fib->flags, ZEBRA_FLAG_SELECTED); | |
2699 | } | |
2700 | else | |
2701 | { | |
2702 | /* This means someone else, other than Zebra, has deleted | |
2703 | * a Zebra router from the kernel. We will add it back */ | |
2704 | rib_install_kernel(rn, fib, 0); | |
2705 | } | |
2037f143 | 2706 | } |
718e3744 | 2707 | else |
2708 | { | |
41ec9222 | 2709 | if (IS_ZEBRA_DEBUG_RIB) |
718e3744 | 2710 | { |
2711 | if (gate) | |
41ec9222 | 2712 | zlog_debug ("%u:%s: via %s ifindex %d type %d " |
78104b9b | 2713 | "doesn't exist in rib", |
35d921cc | 2714 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
616368ed | 2715 | inet_ntop (family2afi(afi), gate, buf2, INET_ADDRSTRLEN), |
35d921cc TT |
2716 | ifindex, |
2717 | type); | |
718e3744 | 2718 | else |
41ec9222 | 2719 | zlog_debug ("%u:%s: ifindex %d type %d doesn't exist in rib", |
35d921cc TT |
2720 | vrf_id, prefix2str (p, buf1, sizeof(buf1)), |
2721 | ifindex, | |
2722 | type); | |
718e3744 | 2723 | } |
2724 | route_unlock_node (rn); | |
2725 | return ZEBRA_ERR_RTNOEXIST; | |
2726 | } | |
2727 | } | |
4d38fdb4 | 2728 | |
718e3744 | 2729 | if (same) |
4d38fdb4 | 2730 | rib_delnode (rn, same); |
2731 | ||
718e3744 | 2732 | route_unlock_node (rn); |
718e3744 | 2733 | return 0; |
2734 | } | |
6b0655a2 | 2735 | |
718e3744 | 2736 | |
718e3744 | 2737 | |
718e3744 | 2738 | int |
3b1098be DS |
2739 | rib_add (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2740 | u_short instance, int flags, struct prefix *p, | |
2741 | union g_addr *gate, union g_addr *src, ifindex_t ifindex, | |
2742 | u_int32_t table_id, u_int32_t metric, u_int32_t mtu, | |
2743 | u_char distance) | |
718e3744 | 2744 | { |
2745 | struct rib *rib; | |
2746 | struct rib *same = NULL; | |
2747 | struct route_table *table; | |
2748 | struct route_node *rn; | |
2749 | struct nexthop *nexthop; | |
2750 | ||
718e3744 | 2751 | /* Lookup table. */ |
3b1098be | 2752 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2753 | if (! table) |
2754 | return 0; | |
2755 | ||
2756 | /* Make sure mask is applied. */ | |
3b1098be | 2757 | apply_mask (p); |
718e3744 | 2758 | |
2759 | /* Set default distance by route type. */ | |
3b1098be DS |
2760 | if (distance == 0) |
2761 | { | |
2762 | if ((unsigned)type >= array_size(route_info)) | |
2763 | distance = 150; | |
2764 | else | |
2765 | distance = route_info[type].distance; | |
2766 | ||
2767 | /* iBGP distance is 200. */ | |
2768 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2769 | distance = 200; | |
2770 | } | |
718e3744 | 2771 | |
718e3744 | 2772 | /* Lookup route node.*/ |
3b1098be | 2773 | rn = route_node_get (table, p); |
718e3744 | 2774 | |
2775 | /* If same type of route are installed, treat it as a implicit | |
2776 | withdraw. */ | |
9fd92e3c | 2777 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2778 | { |
6d691129 PJ |
2779 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2780 | continue; | |
2781 | ||
ebf1ead0 | 2782 | if (rib->type != type) |
2783 | continue; | |
7c8ff89e DS |
2784 | if (rib->instance != instance) |
2785 | continue; | |
ebf1ead0 | 2786 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 2787 | { |
2788 | same = rib; | |
718e3744 | 2789 | break; |
2790 | } | |
3b1098be | 2791 | /* Duplicate connected route comes in. */ |
ebf1ead0 | 2792 | else if ((nexthop = rib->nexthop) && |
2793 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3b1098be DS |
2794 | nexthop->ifindex == ifindex && |
2795 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2796 | { |
2797 | rib->refcnt++; | |
3b1098be | 2798 | return 0 ; |
ebf1ead0 | 2799 | } |
718e3744 | 2800 | } |
2801 | ||
2802 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2803 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2804 | ||
718e3744 | 2805 | rib->type = type; |
7c8ff89e | 2806 | rib->instance = instance; |
718e3744 | 2807 | rib->distance = distance; |
2808 | rib->flags = flags; | |
2809 | rib->metric = metric; | |
c50ca33a | 2810 | rib->mtu = mtu; |
7a4bb9c5 | 2811 | rib->table = table_id; |
78104b9b | 2812 | rib->vrf_id = vrf_id; |
718e3744 | 2813 | rib->nexthop_num = 0; |
2814 | rib->uptime = time (NULL); | |
2815 | ||
2816 | /* Nexthop settings. */ | |
2817 | if (gate) | |
2818 | { | |
3b1098be DS |
2819 | if (afi == AFI_IP6) |
2820 | { | |
2821 | if (ifindex) | |
2822 | rib_nexthop_ipv6_ifindex_add (rib, &gate->ipv6, ifindex); | |
2823 | else | |
2824 | rib_nexthop_ipv6_add (rib, &gate->ipv6); | |
2825 | } | |
718e3744 | 2826 | else |
3b1098be DS |
2827 | { |
2828 | if (ifindex) | |
2829 | rib_nexthop_ipv4_ifindex_add (rib, &gate->ipv4, &src->ipv4, ifindex); | |
2830 | else | |
2831 | rib_nexthop_ipv4_add (rib, &gate->ipv4, &src->ipv4); | |
2832 | } | |
718e3744 | 2833 | } |
2834 | else | |
a399694f | 2835 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 2836 | |
2837 | /* If this route is kernel route, set FIB flag to the route. */ | |
2838 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2839 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2840 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2841 | ||
2842 | /* Link new rib to node.*/ | |
fed643f4 | 2843 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 2844 | { |
2845 | char buf[INET6_ADDRSTRLEN]; | |
2846 | if (IS_ZEBRA_DEBUG_RIB) | |
2847 | { | |
3b1098be | 2848 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); |
41ec9222 | 2849 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " |
2850 | "existing %p", | |
6c4f4e6e DL |
2851 | vrf_id, buf, p->prefixlen, (void *)rn, |
2852 | (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2853 | } |
2854 | ||
2855 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
3b1098be | 2856 | rib_dump (p, rib); |
41ec9222 | 2857 | } |
2bf26d41 | 2858 | rib_addnode (rn, rib, 1); |
718e3744 | 2859 | |
718e3744 | 2860 | /* Free implicit route.*/ |
2861 | if (same) | |
4d38fdb4 | 2862 | rib_delnode (rn, same); |
2863 | ||
2864 | route_unlock_node (rn); | |
718e3744 | 2865 | return 0; |
2866 | } | |
2867 | ||
41fc2714 | 2868 | int |
8a92a8a0 | 2869 | rib_add_ipv6_multipath (struct prefix *p, struct rib *rib, safi_t safi, |
b892f1dd | 2870 | ifindex_t ifindex) |
41fc2714 DS |
2871 | { |
2872 | struct route_table *table; | |
2873 | struct route_node *rn; | |
2874 | struct rib *same = NULL; | |
2875 | struct nexthop *nexthop; | |
2876 | int ret = 0; | |
154caaed | 2877 | int family; |
2878 | ||
2879 | if (!rib) | |
2880 | return 0; | |
41fc2714 | 2881 | |
8a92a8a0 | 2882 | if (p->family == AF_INET) |
154caaed | 2883 | family = AFI_IP; |
2884 | else | |
2885 | family = AFI_IP6; | |
8a92a8a0 | 2886 | |
154caaed | 2887 | /* Lookup table. */ |
2888 | table = zebra_vrf_table_with_table_id (family, safi, rib->vrf_id, rib->table); | |
2889 | if (! table) | |
2890 | return 0; | |
2891 | ||
2892 | if (p->family == AF_INET) | |
2893 | { | |
8a92a8a0 | 2894 | /* Make it sure prefixlen is applied to the prefix. */ |
88177fe3 | 2895 | apply_mask_ipv4 ((struct prefix_ipv4 *)p); |
7a4bb9c5 DS |
2896 | } |
2897 | else | |
2898 | { | |
8a92a8a0 | 2899 | /* Make sure mask is applied. */ |
88177fe3 | 2900 | apply_mask_ipv6 ((struct prefix_ipv6 *)p); |
8a92a8a0 | 2901 | } |
41fc2714 DS |
2902 | |
2903 | /* Set default distance by route type. */ | |
2904 | if (rib->distance == 0) | |
2905 | { | |
2906 | rib->distance = route_info[rib->type].distance; | |
2907 | ||
2908 | /* iBGP distance is 200. */ | |
2909 | if (rib->type == ZEBRA_ROUTE_BGP | |
2910 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2911 | rib->distance = 200; | |
2912 | } | |
2913 | ||
2914 | /* Lookup route node.*/ | |
2915 | rn = route_node_get (table, (struct prefix *) p); | |
2916 | ||
2917 | /* If same type of route are installed, treat it as a implicit | |
2918 | withdraw. */ | |
2919 | RNODE_FOREACH_RIB (rn, same) { | |
2920 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) { | |
2921 | continue; | |
2922 | } | |
2923 | if (same->type != rib->type) { | |
2924 | continue; | |
2925 | } | |
2926 | ||
7c8ff89e DS |
2927 | if (same->instance != rib->instance) { |
2928 | continue; | |
2929 | } | |
2930 | ||
41fc2714 DS |
2931 | if (same->table != rib->table) { |
2932 | continue; | |
2933 | } | |
2934 | if (same->type != ZEBRA_ROUTE_CONNECT) { | |
2935 | break; | |
2936 | } | |
2937 | else if ((nexthop = same->nexthop) && | |
2938 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
2939 | nexthop->ifindex == ifindex) { | |
2940 | same->refcnt++; | |
2941 | return 0; | |
2942 | } | |
2943 | } | |
2944 | ||
2945 | /* If this route is kernel route, set FIB flag to the route. */ | |
2946 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) { | |
2947 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) { | |
2948 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2949 | } | |
2950 | } | |
2951 | ||
2952 | /* Link new rib to node.*/ | |
41ec9222 | 2953 | if (IS_ZEBRA_DEBUG_RIB) |
2954 | { | |
2955 | char buf[INET6_ADDRSTRLEN]; | |
2956 | if (IS_ZEBRA_DEBUG_RIB) | |
2957 | { | |
2958 | inet_ntop (p->family, &p->u.prefix, buf, INET6_ADDRSTRLEN); | |
2959 | zlog_debug ("%u:%s/%d: Inserting route rn %p, rib %p (type %d) " | |
2960 | "existing %p", | |
2961 | rib->vrf_id, buf, p->prefixlen, rn, rib, rib->type, same); | |
2962 | } | |
2963 | ||
2964 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2965 | rib_dump ((struct prefix *)p, rib); | |
2966 | } | |
2bf26d41 | 2967 | rib_addnode (rn, rib, 1); |
41fc2714 | 2968 | ret = 1; |
41ec9222 | 2969 | |
41fc2714 DS |
2970 | /* Free implicit route.*/ |
2971 | if (same) | |
41fc2714 | 2972 | { |
41ec9222 | 2973 | rib_delnode (rn, same); |
2974 | ret = -1; | |
41fc2714 | 2975 | } |
41fc2714 DS |
2976 | |
2977 | route_unlock_node (rn); | |
2978 | return ret; | |
2979 | } | |
2980 | ||
1c848137 | 2981 | /* Schedule routes of a particular table (address-family) based on event. */ |
2982 | static void | |
2983 | rib_update_table (struct route_table *table, rib_update_event_t event) | |
b84c7253 | 2984 | { |
2985 | struct route_node *rn; | |
b84c7253 | 2986 | struct rib *rib, *next; |
2987 | ||
1c848137 | 2988 | /* Walk all routes and queue for processing, if appropriate for |
2989 | * the trigger event. | |
2990 | */ | |
2991 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
2992 | { | |
2993 | switch (event) | |
2994 | { | |
2995 | case RIB_UPDATE_IF_CHANGE: | |
2996 | /* Examine all routes that won't get processed by the protocol or | |
2997 | * triggered by nexthop evaluation (NHT). This would be system, | |
2998 | * kernel and certain static routes. Note that NHT will get | |
2999 | * triggered upon an interface event as connected routes always | |
3000 | * get queued for processing. | |
3001 | */ | |
3002 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
3003 | { | |
3004 | if (rib->type == ZEBRA_ROUTE_OSPF || | |
3005 | rib->type == ZEBRA_ROUTE_OSPF6 || | |
3006 | rib->type == ZEBRA_ROUTE_BGP) | |
3007 | continue; /* protocol will handle. */ | |
3008 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
3009 | { | |
3010 | struct nexthop *nh; | |
3011 | for (nh = rib->nexthop; nh; nh = nh->next) | |
3012 | if (!(nh->type == NEXTHOP_TYPE_IPV4 || | |
3013 | nh->type == NEXTHOP_TYPE_IPV6)) | |
3014 | break; | |
3015 | ||
3016 | /* If we only have nexthops to a gateway, NHT will | |
3017 | * take care. | |
3018 | */ | |
3019 | if (nh) | |
44e9909d | 3020 | rib_queue_add (rn); |
1c848137 | 3021 | } |
3022 | else | |
44e9909d | 3023 | rib_queue_add (rn); |
1c848137 | 3024 | } |
3025 | break; | |
b84c7253 | 3026 | |
1c848137 | 3027 | case RIB_UPDATE_RMAP_CHANGE: |
3028 | case RIB_UPDATE_OTHER: | |
3029 | /* Right now, examine all routes. Can restrict to a protocol in | |
3030 | * some cases (TODO). | |
3031 | */ | |
3032 | if (rnode_to_ribs (rn)) | |
44e9909d | 3033 | rib_queue_add (rn); |
1c848137 | 3034 | break; |
3035 | ||
3036 | default: | |
3037 | break; | |
3038 | } | |
3039 | } | |
b84c7253 | 3040 | } |
3041 | ||
718e3744 | 3042 | /* RIB update function. */ |
3043 | void | |
1c848137 | 3044 | rib_update (vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 3045 | { |
718e3744 | 3046 | struct route_table *table; |
1c848137 | 3047 | |
3048 | /* Process routes of interested address-families. */ | |
78104b9b | 3049 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 3050 | if (table) |
1c848137 | 3051 | rib_update_table (table, event); |
718e3744 | 3052 | |
78104b9b | 3053 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 3054 | if (table) |
1c848137 | 3055 | rib_update_table (table, event); |
718e3744 | 3056 | } |
3057 | ||
718e3744 | 3058 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 3059 | static void |
718e3744 | 3060 | rib_weed_table (struct route_table *table) |
3061 | { | |
3062 | struct route_node *rn; | |
3063 | struct rib *rib; | |
3064 | struct rib *next; | |
3065 | ||
3066 | if (table) | |
3067 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3068 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3069 | { |
6d691129 PJ |
3070 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3071 | continue; | |
3072 | ||
b21b19c5 | 3073 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 3074 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 3075 | rib_delnode (rn, rib); |
718e3744 | 3076 | } |
3077 | } | |
3078 | ||
3079 | /* Delete all routes from non main table. */ | |
3080 | void | |
a1ac18c4 | 3081 | rib_weed_tables (void) |
718e3744 | 3082 | { |
78104b9b FL |
3083 | vrf_iter_t iter; |
3084 | struct zebra_vrf *zvrf; | |
3085 | ||
3086 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3087 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3088 | { | |
3089 | rib_weed_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3090 | rib_weed_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3091 | } | |
718e3744 | 3092 | } |
6b0655a2 | 3093 | |
718e3744 | 3094 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 3095 | static void |
718e3744 | 3096 | rib_sweep_table (struct route_table *table) |
3097 | { | |
3098 | struct route_node *rn; | |
3099 | struct rib *rib; | |
3100 | struct rib *next; | |
3101 | int ret = 0; | |
3102 | ||
3103 | if (table) | |
3104 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3105 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 3106 | { |
6d691129 PJ |
3107 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3108 | continue; | |
3109 | ||
718e3744 | 3110 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
3111 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
3112 | { | |
3113 | ret = rib_uninstall_kernel (rn, rib); | |
3114 | if (! ret) | |
4d38fdb4 | 3115 | rib_delnode (rn, rib); |
718e3744 | 3116 | } |
3117 | } | |
3118 | } | |
3119 | ||
3120 | /* Sweep all RIB tables. */ | |
3121 | void | |
a1ac18c4 | 3122 | rib_sweep_route (void) |
718e3744 | 3123 | { |
78104b9b FL |
3124 | vrf_iter_t iter; |
3125 | struct zebra_vrf *zvrf; | |
3126 | ||
3127 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3128 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3129 | { | |
3130 | rib_sweep_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3131 | rib_sweep_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3132 | } | |
718e3744 | 3133 | } |
2ea1ab1c VT |
3134 | |
3135 | /* Remove specific by protocol routes from 'table'. */ | |
3136 | static unsigned long | |
7c8ff89e | 3137 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
3138 | { |
3139 | struct route_node *rn; | |
3140 | struct rib *rib; | |
3141 | struct rib *next; | |
3142 | unsigned long n = 0; | |
3143 | ||
3144 | if (table) | |
3145 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3146 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 3147 | { |
2ea1ab1c VT |
3148 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
3149 | continue; | |
7c8ff89e | 3150 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
3151 | { |
3152 | rib_delnode (rn, rib); | |
3153 | n++; | |
3154 | } | |
3155 | } | |
3156 | ||
3157 | return n; | |
3158 | } | |
3159 | ||
3160 | /* Remove specific by protocol routes. */ | |
3161 | unsigned long | |
7c8ff89e | 3162 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 3163 | { |
78104b9b FL |
3164 | vrf_iter_t iter; |
3165 | struct zebra_vrf *zvrf; | |
3166 | unsigned long cnt = 0; | |
3167 | ||
3168 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) | |
3169 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3170 | cnt += rib_score_proto_table (proto, instance, zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3171 | +rib_score_proto_table (proto, instance, zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3172 | ||
3173 | return cnt; | |
2ea1ab1c VT |
3174 | } |
3175 | ||
718e3744 | 3176 | /* Close RIB and clean up kernel routes. */ |
a31c5886 | 3177 | void |
718e3744 | 3178 | rib_close_table (struct route_table *table) |
3179 | { | |
3180 | struct route_node *rn; | |
416ec78d | 3181 | rib_table_info_t *info = table->info; |
718e3744 | 3182 | struct rib *rib; |
3183 | ||
3184 | if (table) | |
3185 | for (rn = route_top (table); rn; rn = route_next (rn)) | |
9fd92e3c | 3186 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 3187 | { |
9fd92e3c AS |
3188 | if (!CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
3189 | continue; | |
3190 | ||
416ec78d DL |
3191 | if (info->safi == SAFI_UNICAST) |
3192 | zfpm_trigger_update (rn, NULL); | |
5adc2528 | 3193 | |
9fd92e3c AS |
3194 | if (! RIB_SYSTEM_ROUTE (rib)) |
3195 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 3196 | } |
718e3744 | 3197 | } |
3198 | ||
3199 | /* Close all RIB tables. */ | |
3200 | void | |
a1ac18c4 | 3201 | rib_close (void) |
718e3744 | 3202 | { |
78104b9b FL |
3203 | vrf_iter_t iter; |
3204 | struct zebra_vrf *zvrf; | |
3205 | struct listnode *node; | |
5c610faf | 3206 | struct interface *ifp; |
6678277c | 3207 | u_int32_t table_id; |
5c610faf | 3208 | |
78104b9b FL |
3209 | for (iter = vrf_first (); iter != VRF_ITER_INVALID; iter = vrf_next (iter)) |
3210 | { | |
3211 | if ((zvrf = vrf_iter2info (iter)) != NULL) | |
3212 | { | |
3213 | rib_close_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
3214 | rib_close_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3215 | } | |
3216 | for (ALL_LIST_ELEMENTS_RO (vrf_iter2iflist (iter), node, ifp)) | |
3217 | if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp); | |
3218 | } | |
6678277c DS |
3219 | |
3220 | /* If we do multiple tables per vrf, need to move this to loop above */ | |
3221 | zvrf = vrf_info_lookup (VRF_DEFAULT); | |
3222 | ||
3223 | for (table_id = 0; table_id < ZEBRA_KERNEL_TABLE_MAX; table_id++) | |
3224 | { | |
3225 | if (zvrf->other_table[AFI_IP][table_id]) | |
3226 | rib_close_table (zvrf->other_table[AFI_IP][table_id]); | |
3227 | ||
3228 | if (zvrf->other_table[AFI_IP6][table_id]) | |
3229 | rib_close_table (zvrf->other_table[AFI_IP6][table_id]); | |
3230 | } | |
718e3744 | 3231 | } |
6b0655a2 | 3232 | |
718e3744 | 3233 | /* Routing information base initialize. */ |
3234 | void | |
a1ac18c4 | 3235 | rib_init (void) |
718e3744 | 3236 | { |
4d38fdb4 | 3237 | rib_queue_init (&zebrad); |
718e3744 | 3238 | } |
0915bb0c AS |
3239 | |
3240 | /* | |
3241 | * vrf_id_get_next | |
3242 | * | |
3243 | * Get the first vrf id that is greater than the given vrf id if any. | |
3244 | * | |
3245 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3246 | */ | |
3247 | static inline int | |
b72ede27 | 3248 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3249 | { |
b72ede27 FL |
3250 | vrf_iter_t iter = vrf_iterator (vrf_id); |
3251 | struct zebra_vrf *zvrf = vrf_iter2info (iter); | |
3252 | ||
3253 | /* The same one ? Then find out the next. */ | |
3254 | if (zvrf && (zvrf->vrf_id == vrf_id)) | |
3255 | zvrf = vrf_iter2info (vrf_next (iter)); | |
3256 | ||
3257 | if (zvrf) | |
0915bb0c | 3258 | { |
b72ede27 FL |
3259 | *next_id_p = zvrf->vrf_id; |
3260 | return 1; | |
0915bb0c AS |
3261 | } |
3262 | ||
3263 | return 0; | |
3264 | } | |
3265 | ||
3266 | /* | |
3267 | * rib_tables_iter_next | |
3268 | * | |
3269 | * Returns the next table in the iteration. | |
3270 | */ | |
3271 | struct route_table * | |
3272 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
3273 | { | |
3274 | struct route_table *table; | |
3275 | ||
3276 | /* | |
3277 | * Array that helps us go over all AFI/SAFI combinations via one | |
3278 | * index. | |
3279 | */ | |
3280 | static struct { | |
3281 | afi_t afi; | |
3282 | safi_t safi; | |
3283 | } afi_safis[] = { | |
3284 | { AFI_IP, SAFI_UNICAST }, | |
3285 | { AFI_IP, SAFI_MULTICAST }, | |
3286 | { AFI_IP6, SAFI_UNICAST }, | |
3287 | { AFI_IP6, SAFI_MULTICAST }, | |
3288 | }; | |
3289 | ||
3290 | table = NULL; | |
3291 | ||
3292 | switch (iter->state) | |
3293 | { | |
3294 | ||
3295 | case RIB_TABLES_ITER_S_INIT: | |
9c2bf1cf | 3296 | iter->vrf_id = VRF_DEFAULT; |
0915bb0c AS |
3297 | iter->afi_safi_ix = -1; |
3298 | ||
3299 | /* Fall through */ | |
3300 | ||
3301 | case RIB_TABLES_ITER_S_ITERATING: | |
3302 | iter->afi_safi_ix++; | |
3303 | while (1) | |
3304 | { | |
3305 | ||
3306 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
3307 | { | |
b72ede27 | 3308 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
3309 | afi_safis[iter->afi_safi_ix].safi, |
3310 | iter->vrf_id); | |
3311 | if (table) | |
3312 | break; | |
3313 | ||
3314 | iter->afi_safi_ix++; | |
3315 | } | |
3316 | ||
3317 | /* | |
3318 | * Found another table in this vrf. | |
3319 | */ | |
3320 | if (table) | |
3321 | break; | |
3322 | ||
3323 | /* | |
3324 | * Done with all tables in the current vrf, go to the next | |
3325 | * one. | |
3326 | */ | |
3327 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
3328 | break; | |
3329 | ||
3330 | iter->afi_safi_ix = 0; | |
3331 | } | |
3332 | ||
3333 | break; | |
3334 | ||
3335 | case RIB_TABLES_ITER_S_DONE: | |
3336 | return NULL; | |
3337 | } | |
3338 | ||
3339 | if (table) | |
3340 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3341 | else | |
3342 | iter->state = RIB_TABLES_ITER_S_DONE; | |
3343 | ||
3344 | return table; | |
3345 | } | |
b72ede27 | 3346 |