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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
b892f1dd | 24 | #include "if.h" |
718e3744 | 25 | #include "prefix.h" |
26 | #include "table.h" | |
27 | #include "memory.h" | |
4a1ab8e4 | 28 | #include "zebra_memory.h" |
718e3744 | 29 | #include "command.h" |
718e3744 | 30 | #include "log.h" |
deaa50db | 31 | #include "log_int.h" |
718e3744 | 32 | #include "sockunion.h" |
4d38fdb4 | 33 | #include "linklist.h" |
34 | #include "thread.h" | |
35 | #include "workqueue.h" | |
7514fb77 PJ |
36 | #include "prefix.h" |
37 | #include "routemap.h" | |
fb018d25 | 38 | #include "nexthop.h" |
b72ede27 | 39 | #include "vrf.h" |
40c7bdb0 | 40 | #include "mpls.h" |
05737783 | 41 | #include "srcdest_table.h" |
718e3744 | 42 | |
43 | #include "zebra/rib.h" | |
44 | #include "zebra/rt.h" | |
7c551956 | 45 | #include "zebra/zebra_ns.h" |
718e3744 | 46 | #include "zebra/zserv.h" |
7c551956 | 47 | #include "zebra/zebra_vrf.h" |
718e3744 | 48 | #include "zebra/redistribute.h" |
8902474b | 49 | #include "zebra/zebra_routemap.h" |
718e3744 | 50 | #include "zebra/debug.h" |
fb018d25 | 51 | #include "zebra/zebra_rnh.h" |
88177fe3 | 52 | #include "zebra/interface.h" |
d44ca835 | 53 | #include "zebra/connected.h" |
718e3744 | 54 | |
4f8ea50c DL |
55 | DEFINE_HOOK(rib_update, (struct route_node *rn, const char *reason), (rn, reason)) |
56 | ||
6baf7bb8 DS |
57 | /* Should we allow non Quagga processes to delete our routes */ |
58 | extern int allow_delete; | |
59 | ||
457eb9af PJ |
60 | /* Hold time for RIB process, should be very minimal. |
61 | * it is useful to able to set it otherwise for testing, hence exported | |
62 | * as global here for test-rig code. | |
63 | */ | |
64 | int rib_process_hold_time = 10; | |
65 | ||
718e3744 | 66 | /* Each route type's string and default distance value. */ |
d145bc00 | 67 | static const struct |
718e3744 | 68 | { |
69 | int key; | |
70 | int distance; | |
5734509c | 71 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 72 | { |
5734509c PJ |
73 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
74 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
75 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
76 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
77 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
78 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
79 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
80 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
81 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
82 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
2fb975da | 83 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10}, |
7052f228 | 84 | /* no entry/default: 150 */ |
718e3744 | 85 | }; |
6b0655a2 | 86 | |
4623d897 DL |
87 | /* RPF lookup behaviour */ |
88 | static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; | |
89 | ||
6c4f4e6e DL |
90 | |
91 | static void __attribute__((format (printf, 5, 6))) | |
2263a412 DL |
92 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, int priority, |
93 | const char *msgfmt, ...) | |
94 | { | |
05737783 | 95 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
2263a412 DL |
96 | char msgbuf[512]; |
97 | va_list ap; | |
98 | ||
99 | va_start(ap, msgfmt); | |
100 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
101 | va_end(ap); | |
102 | ||
103 | if (rn) | |
104 | { | |
05737783 CF |
105 | rib_table_info_t *info = srcdest_rnode_table_info (rn); |
106 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
cb653491 | 107 | |
35d921cc TT |
108 | if (info->safi == SAFI_MULTICAST) |
109 | strcat(buf, " (MRIB)"); | |
2263a412 DL |
110 | } |
111 | else | |
112 | { | |
113 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
114 | } | |
115 | ||
bb85d700 | 116 | zlog (priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); |
2263a412 DL |
117 | } |
118 | ||
119 | #define rnode_debug(node, vrf_id, ...) \ | |
120 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) | |
121 | #define rnode_info(node, ...) \ | |
122 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) | |
123 | ||
40c7bdb0 | 124 | u_char |
125 | route_distance (int type) | |
126 | { | |
127 | u_char distance; | |
128 | ||
129 | if ((unsigned)type >= array_size(route_info)) | |
130 | distance = 150; | |
131 | else | |
132 | distance = route_info[type].distance; | |
133 | ||
134 | return distance; | |
135 | } | |
136 | ||
7a4bb9c5 DS |
137 | int |
138 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
139 | { | |
8f500a1c RW |
140 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX)) |
141 | return 0; | |
142 | ||
143 | #ifdef linux | |
144 | if ((table_id == RT_TABLE_UNSPEC) || | |
7a4bb9c5 DS |
145 | (table_id == RT_TABLE_LOCAL) || |
146 | (table_id == RT_TABLE_COMPAT)) | |
147 | return 0; | |
8f500a1c RW |
148 | #endif |
149 | ||
150 | return 1; | |
7a4bb9c5 DS |
151 | } |
152 | ||
153 | int | |
154 | is_zebra_main_routing_table(u_int32_t table_id) | |
155 | { | |
156 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
157 | return 1; | |
158 | return 0; | |
159 | } | |
160 | ||
0aabccc0 DD |
161 | int |
162 | zebra_check_addr (struct prefix *p) | |
163 | { | |
164 | if (p->family == AF_INET) | |
165 | { | |
166 | u_int32_t addr; | |
167 | ||
168 | addr = p->u.prefix4.s_addr; | |
169 | addr = ntohl (addr); | |
170 | ||
171 | if (IPV4_NET127 (addr) | |
172 | || IN_CLASSD (addr) | |
173 | || IPV4_LINKLOCAL(addr)) | |
174 | return 0; | |
175 | } | |
0aabccc0 DD |
176 | if (p->family == AF_INET6) |
177 | { | |
178 | if (IN6_IS_ADDR_LOOPBACK (&p->u.prefix6)) | |
179 | return 0; | |
180 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
181 | return 0; | |
182 | } | |
0aabccc0 DD |
183 | return 1; |
184 | } | |
185 | ||
fa713d9e | 186 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 187 | void |
a399694f | 188 | rib_nexthop_add (struct rib *rib, struct nexthop *nexthop) |
fa713d9e | 189 | { |
a399694f | 190 | nexthop_add(&rib->nexthop, nexthop); |
718e3744 | 191 | rib->nexthop_num++; |
192 | } | |
193 | ||
6e26278c | 194 | |
6e26278c DS |
195 | |
196 | /** | |
197 | * copy_nexthop - copy a nexthop to the rib structure. | |
198 | */ | |
199 | void | |
a399694f | 200 | rib_copy_nexthops (struct rib *rib, struct nexthop *nh) |
6e26278c DS |
201 | { |
202 | struct nexthop *nexthop; | |
203 | ||
204 | nexthop = nexthop_new(); | |
205 | nexthop->flags = nh->flags; | |
206 | nexthop->type = nh->type; | |
207 | nexthop->ifindex = nh->ifindex; | |
6e26278c DS |
208 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); |
209 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
c0f4be83 | 210 | if (nh->nh_label) |
ce549947 | 211 | nexthop_add_labels (nexthop, nh->nh_label_type, nh->nh_label->num_labels, |
c0f4be83 | 212 | &nh->nh_label->label[0]); |
a399694f | 213 | rib_nexthop_add(rib, nexthop); |
6e26278c | 214 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) |
a399694f | 215 | copy_nexthops(&nexthop->resolved, nh->resolved); |
6e26278c DS |
216 | } |
217 | ||
718e3744 | 218 | /* Delete specified nexthop from the list. */ |
28f6dde8 | 219 | void |
a399694f | 220 | rib_nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
718e3744 | 221 | { |
222 | if (nexthop->next) | |
223 | nexthop->next->prev = nexthop->prev; | |
224 | if (nexthop->prev) | |
225 | nexthop->prev->next = nexthop->next; | |
226 | else | |
227 | rib->nexthop = nexthop->next; | |
228 | rib->nexthop_num--; | |
229 | } | |
230 | ||
fa713d9e | 231 | |
fa713d9e | 232 | |
718e3744 | 233 | struct nexthop * |
b892f1dd | 234 | rib_nexthop_ifindex_add (struct rib *rib, ifindex_t ifindex) |
718e3744 | 235 | { |
236 | struct nexthop *nexthop; | |
237 | ||
a399694f | 238 | nexthop = nexthop_new(); |
718e3744 | 239 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
240 | nexthop->ifindex = ifindex; | |
241 | ||
a399694f | 242 | rib_nexthop_add (rib, nexthop); |
718e3744 | 243 | |
244 | return nexthop; | |
245 | } | |
246 | ||
718e3744 | 247 | struct nexthop * |
a399694f | 248 | rib_nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 249 | { |
250 | struct nexthop *nexthop; | |
251 | ||
a399694f | 252 | nexthop = nexthop_new(); |
718e3744 | 253 | nexthop->type = NEXTHOP_TYPE_IPV4; |
254 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
255 | if (src) |
256 | nexthop->src.ipv4 = *src; | |
718e3744 | 257 | |
a399694f | 258 | rib_nexthop_add (rib, nexthop); |
718e3744 | 259 | |
260 | return nexthop; | |
261 | } | |
262 | ||
26e2ae36 | 263 | struct nexthop * |
a399694f | 264 | rib_nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
b892f1dd | 265 | struct in_addr *src, ifindex_t ifindex) |
718e3744 | 266 | { |
267 | struct nexthop *nexthop; | |
d44ca835 | 268 | struct interface *ifp; |
718e3744 | 269 | |
a399694f | 270 | nexthop = nexthop_new(); |
718e3744 | 271 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
272 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
273 | if (src) |
274 | nexthop->src.ipv4 = *src; | |
718e3744 | 275 | nexthop->ifindex = ifindex; |
7e2b7603 | 276 | ifp = if_lookup_by_index (nexthop->ifindex, VRF_DEFAULT); |
12f6fb97 DS |
277 | /*Pending: need to think if null ifp here is ok during bootup? |
278 | There was a crash because ifp here was coming to be NULL */ | |
279 | if (ifp) | |
d44ca835 DS |
280 | if (connected_is_unnumbered(ifp)) { |
281 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
282 | } | |
718e3744 | 283 | |
a399694f | 284 | rib_nexthop_add (rib, nexthop); |
718e3744 | 285 | |
286 | return nexthop; | |
287 | } | |
288 | ||
718e3744 | 289 | struct nexthop * |
a399694f | 290 | rib_nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) |
718e3744 | 291 | { |
292 | struct nexthop *nexthop; | |
293 | ||
a399694f | 294 | nexthop = nexthop_new(); |
718e3744 | 295 | nexthop->type = NEXTHOP_TYPE_IPV6; |
296 | nexthop->gate.ipv6 = *ipv6; | |
297 | ||
a399694f | 298 | rib_nexthop_add (rib, nexthop); |
718e3744 | 299 | |
300 | return nexthop; | |
301 | } | |
302 | ||
41fc2714 | 303 | struct nexthop * |
a399694f | 304 | rib_nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
b892f1dd | 305 | ifindex_t ifindex) |
718e3744 | 306 | { |
307 | struct nexthop *nexthop; | |
308 | ||
4a1ab8e4 | 309 | nexthop = nexthop_new(); |
718e3744 | 310 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
311 | nexthop->gate.ipv6 = *ipv6; | |
312 | nexthop->ifindex = ifindex; | |
313 | ||
a399694f | 314 | rib_nexthop_add (rib, nexthop); |
718e3744 | 315 | |
316 | return nexthop; | |
317 | } | |
718e3744 | 318 | |
595db7f1 | 319 | struct nexthop * |
a399694f | 320 | rib_nexthop_blackhole_add (struct rib *rib) |
595db7f1 | 321 | { |
322 | struct nexthop *nexthop; | |
323 | ||
a399694f | 324 | nexthop = nexthop_new(); |
595db7f1 | 325 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
326 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
327 | ||
a399694f | 328 | rib_nexthop_add (rib, nexthop); |
595db7f1 | 329 | |
330 | return nexthop; | |
331 | } | |
332 | ||
fa713d9e CF |
333 | /* This method checks whether a recursive nexthop has at |
334 | * least one resolved nexthop in the fib. | |
335 | */ | |
336 | int | |
337 | nexthop_has_fib_child(struct nexthop *nexthop) | |
338 | { | |
339 | struct nexthop *nh; | |
340 | ||
341 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
342 | return 0; | |
343 | ||
344 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
345 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
346 | return 1; | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
718e3744 | 351 | /* If force flag is not set, do not modify falgs at all for uninstall |
352 | the route from FIB. */ | |
a1ac18c4 | 353 | static int |
b153b010 DS |
354 | nexthop_active (afi_t afi, struct rib *rib, struct nexthop *nexthop, int set, |
355 | struct route_node *top) | |
718e3744 | 356 | { |
b153b010 | 357 | struct prefix p; |
718e3744 | 358 | struct route_table *table; |
359 | struct route_node *rn; | |
360 | struct rib *match; | |
fa713d9e | 361 | int resolved; |
6e26278c | 362 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 363 | struct nexthop *resolved_hop; |
6e26278c | 364 | int recursing = 0; |
c8a1cb5c | 365 | struct interface *ifp; |
718e3744 | 366 | |
b153b010 | 367 | if ((nexthop->type == NEXTHOP_TYPE_IPV4) || nexthop->type == NEXTHOP_TYPE_IPV6) |
718e3744 | 368 | nexthop->ifindex = 0; |
369 | ||
370 | if (set) | |
fa713d9e CF |
371 | { |
372 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 373 | zebra_deregister_rnh_static_nexthops(rib->vrf_id, nexthop->resolved, top); |
a399694f | 374 | nexthops_free(nexthop->resolved); |
fa713d9e | 375 | nexthop->resolved = NULL; |
c50ca33a | 376 | rib->nexthop_mtu = 0; |
fa713d9e | 377 | } |
718e3744 | 378 | |
6e26278c DS |
379 | /* Skip nexthops that have been filtered out due to route-map */ |
380 | /* The nexthops are specific to this route and so the same */ | |
381 | /* nexthop for a different route may not have this flag set */ | |
382 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
383 | return 0; | |
384 | ||
d44ca835 DS |
385 | /* |
386 | * Check to see if we should trust the passed in information | |
387 | * for UNNUMBERED interfaces as that we won't find the GW | |
388 | * address in the routing table. | |
c8a1cb5c DS |
389 | */ |
390 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
391 | { | |
7e2b7603 | 392 | ifp = if_lookup_by_index (nexthop->ifindex, VRF_DEFAULT); |
d44ca835 DS |
393 | if (ifp && connected_is_unnumbered(ifp)) |
394 | { | |
395 | if (if_is_operative(ifp)) | |
396 | return 1; | |
397 | else | |
398 | return 0; | |
399 | } | |
c8a1cb5c DS |
400 | else |
401 | return 0; | |
402 | } | |
403 | ||
718e3744 | 404 | /* Make lookup prefix. */ |
b153b010 DS |
405 | memset (&p, 0, sizeof (struct prefix)); |
406 | switch (afi) | |
407 | { | |
408 | case AFI_IP: | |
409 | p.family = AF_INET; | |
410 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
411 | p.u.prefix4 = nexthop->gate.ipv4; | |
412 | break; | |
413 | case AFI_IP6: | |
414 | p.family = AF_INET6; | |
415 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
416 | p.u.prefix6 = nexthop->gate.ipv6; | |
417 | break; | |
418 | default: | |
419 | assert (afi != AFI_IP && afi != AFI_IP6); | |
420 | break; | |
421 | } | |
718e3744 | 422 | /* Lookup table. */ |
b153b010 | 423 | table = zebra_vrf_table (afi, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 424 | if (! table) |
425 | return 0; | |
426 | ||
427 | rn = route_node_match (table, (struct prefix *) &p); | |
428 | while (rn) | |
429 | { | |
430 | route_unlock_node (rn); | |
431 | ||
a50c107e | 432 | /* If lookup self prefix return immediately. */ |
718e3744 | 433 | if (rn == top) |
434 | return 0; | |
435 | ||
436 | /* Pick up selected route. */ | |
18ff3edd DS |
437 | /* However, do not resolve over default route unless explicitly allowed. */ |
438 | if (is_default_prefix (&rn->p) && | |
439 | !nh_resolve_via_default (p.family)) | |
440 | return 0; | |
441 | ||
9fd92e3c | 442 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
443 | { |
444 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
445 | continue; | |
633e504d DS |
446 | |
447 | /* if the next hop is imported from another table, skip it */ | |
448 | if (match->type == ZEBRA_ROUTE_TABLE) | |
449 | continue; | |
446bb95e | 450 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
451 | break; |
452 | } | |
718e3744 | 453 | |
454 | /* If there is no selected route or matched route is EGP, go up | |
455 | tree. */ | |
6e26278c | 456 | if (! match) |
718e3744 | 457 | { |
458 | do { | |
459 | rn = rn->parent; | |
460 | } while (rn && rn->info == NULL); | |
461 | if (rn) | |
462 | route_lock_node (rn); | |
463 | } | |
464 | else | |
465 | { | |
48a53dc7 CF |
466 | /* If the longest prefix match for the nexthop yields |
467 | * a blackhole, mark it as inactive. */ | |
468 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
469 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
470 | return 0; | |
471 | ||
718e3744 | 472 | if (match->type == ZEBRA_ROUTE_CONNECT) |
473 | { | |
474 | /* Directly point connected route. */ | |
475 | newhop = match->nexthop; | |
b153b010 DS |
476 | if (newhop) |
477 | { | |
6bcc7f4b DS |
478 | if (nexthop->type == NEXTHOP_TYPE_IPV4 || |
479 | nexthop->type == NEXTHOP_TYPE_IPV6) | |
480 | nexthop->ifindex = newhop->ifindex; | |
b153b010 | 481 | } |
718e3744 | 482 | return 1; |
483 | } | |
22afbf94 | 484 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
718e3744 | 485 | { |
fa713d9e | 486 | resolved = 0; |
718e3744 | 487 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
488 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
489 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
490 | { | |
491 | if (set) | |
492 | { | |
493 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 494 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e | 495 | |
4a1ab8e4 | 496 | resolved_hop = nexthop_new(); |
fa713d9e | 497 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
c3e6b595 CF |
498 | /* If the resolving route specifies a gateway, use it */ |
499 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 500 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
c3e6b595 CF |
501 | { |
502 | resolved_hop->type = newhop->type; | |
503 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
877a0aba DS |
504 | |
505 | if (newhop->ifindex) | |
506 | { | |
507 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
508 | resolved_hop->ifindex = newhop->ifindex; | |
509 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) | |
510 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
511 | } | |
c3e6b595 | 512 | } |
b153b010 DS |
513 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
514 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
515 | { | |
516 | resolved_hop->type = newhop->type; | |
517 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
518 | ||
519 | if (newhop->ifindex) | |
520 | { | |
521 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
522 | resolved_hop->ifindex = newhop->ifindex; | |
523 | } | |
524 | } | |
c3e6b595 | 525 | |
877a0aba DS |
526 | /* If the resolving route is an interface route, |
527 | * it means the gateway we are looking up is connected | |
528 | * to that interface. (The actual network is _not_ onlink). | |
529 | * Therefore, the resolved route should have the original | |
530 | * gateway as nexthop as it is directly connected. | |
531 | * | |
532 | * On Linux, we have to set the onlink netlink flag because | |
533 | * otherwise, the kernel won't accept the route. */ | |
3ee39b5b | 534 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 | 535 | { |
877a0aba | 536 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
b153b010 DS |
537 | if (afi == AFI_IP) |
538 | { | |
539 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
540 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
541 | } | |
542 | else if (afi == AFI_IP6) | |
543 | { | |
544 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
545 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
546 | } | |
c3e6b595 CF |
547 | resolved_hop->ifindex = newhop->ifindex; |
548 | } | |
fa713d9e | 549 | |
a399694f | 550 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
551 | } |
552 | resolved = 1; | |
553 | } | |
554 | return resolved; | |
555 | } | |
556 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
557 | { | |
558 | resolved = 0; | |
559 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
560 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
561 | { | |
562 | if (set) | |
563 | { | |
564 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
565 | ||
4a1ab8e4 | 566 | resolved_hop = nexthop_new(); |
6e26278c DS |
567 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
568 | /* If the resolving route specifies a gateway, use it */ | |
569 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 570 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
6e26278c DS |
571 | { |
572 | resolved_hop->type = newhop->type; | |
573 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
574 | ||
575 | if (newhop->ifindex) | |
576 | { | |
577 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
578 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
579 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
580 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
581 | } |
582 | } | |
6e26278c | 583 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
3ee39b5b | 584 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
6e26278c DS |
585 | { |
586 | resolved_hop->type = newhop->type; | |
587 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
588 | ||
589 | if (newhop->ifindex) | |
590 | { | |
591 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
592 | resolved_hop->ifindex = newhop->ifindex; | |
593 | } | |
594 | } | |
595 | ||
b153b010 DS |
596 | /* If the resolving route is an interface route, |
597 | * it means the gateway we are looking up is connected | |
598 | * to that interface. (The actual network is _not_ onlink). | |
599 | * Therefore, the resolved route should have the original | |
600 | * gateway as nexthop as it is directly connected. | |
601 | * | |
602 | * On Linux, we have to set the onlink netlink flag because | |
603 | * otherwise, the kernel won't accept the route. | |
604 | */ | |
3ee39b5b | 605 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c | 606 | { |
b153b010 DS |
607 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
608 | if (afi == AFI_IP) | |
c3e6b595 | 609 | { |
b153b010 DS |
610 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
611 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
c3e6b595 | 612 | } |
b153b010 DS |
613 | else if (afi == AFI_IP6) |
614 | { | |
c3e6b595 CF |
615 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
616 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
b153b010 DS |
617 | } |
618 | resolved_hop->ifindex = newhop->ifindex; | |
c3e6b595 | 619 | } |
fa713d9e | 620 | |
a399694f | 621 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 622 | } |
fa713d9e | 623 | resolved = 1; |
718e3744 | 624 | } |
b153b010 DS |
625 | if (resolved && set) |
626 | rib->nexthop_mtu = match->mtu; | |
fa713d9e | 627 | return resolved; |
718e3744 | 628 | } |
629 | else | |
630 | { | |
631 | return 0; | |
632 | } | |
633 | } | |
634 | } | |
635 | return 0; | |
636 | } | |
718e3744 | 637 | |
638 | struct rib * | |
14364a31 DS |
639 | rib_match (afi_t afi, safi_t safi, vrf_id_t vrf_id, |
640 | union g_addr *addr, struct route_node **rn_out) | |
718e3744 | 641 | { |
14364a31 | 642 | struct prefix p; |
718e3744 | 643 | struct route_table *table; |
644 | struct route_node *rn; | |
645 | struct rib *match; | |
fa713d9e CF |
646 | struct nexthop *newhop, *tnewhop; |
647 | int recursing; | |
718e3744 | 648 | |
649 | /* Lookup table. */ | |
14364a31 | 650 | table = zebra_vrf_table (afi, safi, vrf_id); |
718e3744 | 651 | if (! table) |
652 | return 0; | |
653 | ||
14364a31 DS |
654 | memset (&p, 0, sizeof (struct prefix)); |
655 | p.family = afi; | |
14364a31 | 656 | if (afi == AFI_IP) |
d71f1c4e DS |
657 | { |
658 | p.u.prefix4 = addr->ipv4; | |
659 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
660 | } | |
14364a31 | 661 | else |
d71f1c4e DS |
662 | { |
663 | p.u.prefix6 = addr->ipv6; | |
664 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
665 | } | |
718e3744 | 666 | |
667 | rn = route_node_match (table, (struct prefix *) &p); | |
668 | ||
669 | while (rn) | |
670 | { | |
671 | route_unlock_node (rn); | |
672 | ||
673 | /* Pick up selected route. */ | |
9fd92e3c | 674 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
675 | { |
676 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
677 | continue; | |
446bb95e | 678 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
679 | break; |
680 | } | |
718e3744 | 681 | |
682 | /* If there is no selected route or matched route is EGP, go up | |
683 | tree. */ | |
6e26278c | 684 | if (! match) |
718e3744 | 685 | { |
686 | do { | |
687 | rn = rn->parent; | |
688 | } while (rn && rn->info == NULL); | |
689 | if (rn) | |
690 | route_lock_node (rn); | |
691 | } | |
692 | else | |
693 | { | |
33550aa8 | 694 | if (match->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 695 | { |
33550aa8 | 696 | int found = 0; |
fa713d9e | 697 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 698 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
33550aa8 DL |
699 | { |
700 | found = 1; | |
701 | break; | |
702 | } | |
703 | if (!found) | |
704 | return NULL; | |
718e3744 | 705 | } |
33550aa8 DL |
706 | |
707 | if (rn_out) | |
708 | *rn_out = rn; | |
709 | return match; | |
718e3744 | 710 | } |
711 | } | |
712 | return NULL; | |
713 | } | |
714 | ||
4623d897 | 715 | struct rib * |
f86a2b82 | 716 | rib_match_ipv4_multicast (vrf_id_t vrf_id, struct in_addr addr, struct route_node **rn_out) |
4623d897 DL |
717 | { |
718 | struct rib *rib = NULL, *mrib = NULL, *urib = NULL; | |
719 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
14364a31 | 720 | union g_addr gaddr = { .ipv4 = addr }; |
4623d897 DL |
721 | |
722 | switch (ipv4_multicast_mode) | |
723 | { | |
724 | case MCAST_MRIB_ONLY: | |
f86a2b82 | 725 | return rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, rn_out); |
4623d897 | 726 | case MCAST_URIB_ONLY: |
f86a2b82 | 727 | return rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); |
4623d897 DL |
728 | case MCAST_NO_CONFIG: |
729 | case MCAST_MIX_MRIB_FIRST: | |
f86a2b82 | 730 | rib = mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
4623d897 | 731 | if (!mrib) |
f86a2b82 | 732 | rib = urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); |
4623d897 DL |
733 | break; |
734 | case MCAST_MIX_DISTANCE: | |
f86a2b82 DS |
735 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
736 | urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
4623d897 DL |
737 | if (mrib && urib) |
738 | rib = urib->distance < mrib->distance ? urib : mrib; | |
739 | else if (mrib) | |
740 | rib = mrib; | |
741 | else if (urib) | |
742 | rib = urib; | |
743 | break; | |
744 | case MCAST_MIX_PFXLEN: | |
f86a2b82 DS |
745 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
746 | urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
4623d897 DL |
747 | if (mrib && urib) |
748 | rib = u_rn->p.prefixlen > m_rn->p.prefixlen ? urib : mrib; | |
749 | else if (mrib) | |
750 | rib = mrib; | |
751 | else if (urib) | |
752 | rib = urib; | |
753 | break; | |
754 | } | |
755 | ||
756 | if (rn_out) | |
757 | *rn_out = (rib == mrib) ? m_rn : u_rn; | |
758 | ||
759 | if (IS_ZEBRA_DEBUG_RIB) | |
760 | { | |
761 | char buf[BUFSIZ]; | |
762 | inet_ntop (AF_INET, &addr, buf, BUFSIZ); | |
763 | ||
764 | zlog_debug("%s: %s: found %s, using %s", | |
765 | __func__, buf, | |
766 | mrib ? (urib ? "MRIB+URIB" : "MRIB") : | |
767 | urib ? "URIB" : "nothing", | |
768 | rib == urib ? "URIB" : rib == mrib ? "MRIB" : "none"); | |
769 | } | |
770 | return rib; | |
771 | } | |
772 | ||
773 | void | |
774 | multicast_mode_ipv4_set (enum multicast_mode mode) | |
775 | { | |
776 | if (IS_ZEBRA_DEBUG_RIB) | |
777 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, mode); | |
778 | ipv4_multicast_mode = mode; | |
779 | } | |
780 | ||
781 | enum multicast_mode | |
782 | multicast_mode_ipv4_get (void) | |
783 | { | |
784 | return ipv4_multicast_mode; | |
785 | } | |
786 | ||
718e3744 | 787 | struct rib * |
78104b9b | 788 | rib_lookup_ipv4 (struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 789 | { |
790 | struct route_table *table; | |
791 | struct route_node *rn; | |
792 | struct rib *match; | |
fa713d9e CF |
793 | struct nexthop *nexthop, *tnexthop; |
794 | int recursing; | |
718e3744 | 795 | |
796 | /* Lookup table. */ | |
78104b9b | 797 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 798 | if (! table) |
799 | return 0; | |
800 | ||
801 | rn = route_node_lookup (table, (struct prefix *) p); | |
802 | ||
803 | /* No route for this prefix. */ | |
804 | if (! rn) | |
805 | return NULL; | |
806 | ||
807 | /* Unlock node. */ | |
808 | route_unlock_node (rn); | |
809 | ||
9fd92e3c | 810 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
811 | { |
812 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
813 | continue; | |
446bb95e | 814 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
815 | break; |
816 | } | |
718e3744 | 817 | |
6e26278c | 818 | if (! match) |
718e3744 | 819 | return NULL; |
820 | ||
821 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
822 | return match; | |
823 | ||
fa713d9e | 824 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 825 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
826 | return match; | |
827 | ||
828 | return NULL; | |
829 | } | |
830 | ||
dc95824a DO |
831 | /* |
832 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
833 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
446bb95e | 834 | * the whole RIB and has RIB_ENTRY_SELECTED_FIB set. |
dc95824a DO |
835 | * |
836 | * Return values: | |
837 | * -1: error | |
838 | * 0: exact match found | |
839 | * 1: a match was found with a different gate | |
840 | * 2: connected route found | |
841 | * 3: no matches found | |
842 | */ | |
843 | int | |
78104b9b FL |
844 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate, |
845 | vrf_id_t vrf_id) | |
dc95824a DO |
846 | { |
847 | struct route_table *table; | |
848 | struct route_node *rn; | |
849 | struct rib *match; | |
fa713d9e CF |
850 | struct nexthop *nexthop, *tnexthop; |
851 | int recursing; | |
852 | int nexthops_active; | |
dc95824a DO |
853 | |
854 | /* Lookup table. */ | |
78104b9b | 855 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
856 | if (! table) |
857 | return ZEBRA_RIB_LOOKUP_ERROR; | |
858 | ||
859 | /* Scan the RIB table for exactly matching RIB entry. */ | |
860 | rn = route_node_lookup (table, (struct prefix *) p); | |
861 | ||
862 | /* No route for this prefix. */ | |
863 | if (! rn) | |
864 | return ZEBRA_RIB_NOTFOUND; | |
865 | ||
866 | /* Unlock node. */ | |
867 | route_unlock_node (rn); | |
868 | ||
869 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 870 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
871 | { |
872 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
873 | continue; | |
446bb95e | 874 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
875 | break; |
876 | } | |
dc95824a DO |
877 | |
878 | /* None such found :( */ | |
879 | if (!match) | |
880 | return ZEBRA_RIB_NOTFOUND; | |
881 | ||
882 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
883 | return ZEBRA_RIB_FOUND_CONNECTED; | |
884 | ||
885 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
886 | nexthops_active = 0; |
887 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 888 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 889 | { |
fa713d9e CF |
890 | nexthops_active = 1; |
891 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
892 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 893 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
894 | { |
895 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
896 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
897 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
898 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
899 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
900 | } | |
dc95824a | 901 | } |
fa713d9e CF |
902 | |
903 | if (nexthops_active) | |
904 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
905 | |
906 | return ZEBRA_RIB_NOTFOUND; | |
907 | } | |
908 | ||
7514fb77 PJ |
909 | #define RIB_SYSTEM_ROUTE(R) \ |
910 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
911 | ||
dc95824a DO |
912 | /* This function verifies reachability of one given nexthop, which can be |
913 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
914 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
915 | * nexthop->ifindex will be updated appropriately as well. | |
916 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
917 | * not vice versa. | |
918 | * | |
919 | * The return value is the final value of 'ACTIVE' flag. | |
920 | */ | |
921 | ||
d02c56cd | 922 | static unsigned |
718e3744 | 923 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
924 | struct nexthop *nexthop, int set) | |
925 | { | |
926 | struct interface *ifp; | |
7514fb77 | 927 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 928 | int family; |
05737783 CF |
929 | char buf[SRCDEST2STR_BUFFER]; |
930 | struct prefix *p, *src_p; | |
931 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
718e3744 | 932 | |
7a4bb9c5 DS |
933 | if (rn->p.family == AF_INET) |
934 | family = AFI_IP; | |
935 | else if (rn->p.family == AF_INET6) | |
936 | family = AFI_IP6; | |
937 | else | |
938 | family = 0; | |
718e3744 | 939 | switch (nexthop->type) |
940 | { | |
941 | case NEXTHOP_TYPE_IFINDEX: | |
7e2b7603 | 942 | ifp = if_lookup_by_index (nexthop->ifindex, rib->vrf_id); |
3f087670 | 943 | if (ifp && if_is_operative(ifp)) |
718e3744 | 944 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
945 | else | |
946 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
947 | break; | |
718e3744 | 948 | case NEXTHOP_TYPE_IPV4: |
949 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 950 | family = AFI_IP; |
b153b010 | 951 | if (nexthop_active (AFI_IP, rib, nexthop, set, rn)) |
718e3744 | 952 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
953 | else | |
954 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
955 | break; | |
718e3744 | 956 | case NEXTHOP_TYPE_IPV6: |
7514fb77 | 957 | family = AFI_IP6; |
b153b010 | 958 | if (nexthop_active (AFI_IP6, rib, nexthop, set, rn)) |
718e3744 | 959 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
960 | else | |
961 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
962 | break; | |
963 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 964 | /* RFC 5549, v4 prefix with v6 NH */ |
965 | if (rn->p.family != AF_INET) | |
966 | family = AFI_IP6; | |
718e3744 | 967 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
968 | { | |
7e2b7603 | 969 | ifp = if_lookup_by_index (nexthop->ifindex, rib->vrf_id); |
3f087670 | 970 | if (ifp && if_is_operative(ifp)) |
718e3744 | 971 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
972 | else | |
973 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
974 | } | |
975 | else | |
976 | { | |
b153b010 | 977 | if (nexthop_active (AFI_IP6, rib, nexthop, set, rn)) |
718e3744 | 978 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
979 | else | |
980 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
981 | } | |
982 | break; | |
595db7f1 | 983 | case NEXTHOP_TYPE_BLACKHOLE: |
984 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
985 | break; | |
718e3744 | 986 | default: |
987 | break; | |
988 | } | |
7514fb77 PJ |
989 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
990 | return 0; | |
991 | ||
f3a1732e CF |
992 | /* XXX: What exactly do those checks do? Do we support |
993 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 | 994 | if (RIB_SYSTEM_ROUTE(rib) || |
05737783 CF |
995 | (family == AFI_IP && p->family != AF_INET) || |
996 | (family == AFI_IP6 && p->family != AF_INET6)) | |
7514fb77 PJ |
997 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
998 | ||
f3a1732e CF |
999 | /* The original code didn't determine the family correctly |
1000 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1001 | * from the rib_table_info in those cases. | |
1002 | * Possibly it may be better to use only the rib_table_info | |
1003 | * in every case. | |
1004 | */ | |
1005 | if (!family) | |
05737783 CF |
1006 | { |
1007 | rib_table_info_t *info; | |
1008 | ||
1009 | info = srcdest_rnode_table_info(rn); | |
1010 | family = info->afi; | |
1011 | } | |
f3a1732e | 1012 | |
c52ef59f | 1013 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1014 | |
ca84c8ef | 1015 | /* It'll get set if required inside */ |
05737783 | 1016 | ret = zebra_route_map_check(family, rib->type, p, nexthop, rib->vrf_id, |
0032dd59 | 1017 | rib->tag); |
7514fb77 | 1018 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1019 | { |
1020 | if (IS_ZEBRA_DEBUG_RIB) | |
1021 | { | |
05737783 CF |
1022 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
1023 | zlog_debug("%u:%s: Filtering out with NH out %s due to route map", | |
1024 | rib->vrf_id, buf, | |
baaea325 | 1025 | ifindex2ifname (nexthop->ifindex, rib->vrf_id)); |
518f0eb1 DS |
1026 | } |
1027 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1028 | } | |
718e3744 | 1029 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1030 | } | |
1031 | ||
03e232a4 DO |
1032 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1033 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1034 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
2f97fa65 | 1035 | * is flagged with RIB_ENTRY_CHANGED. The 4th 'set' argument is |
03e232a4 DO |
1036 | * transparently passed to nexthop_active_check(). |
1037 | * | |
1038 | * Return value is the new number of active nexthops. | |
1039 | */ | |
1040 | ||
a1ac18c4 | 1041 | static int |
718e3744 | 1042 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1043 | { | |
1044 | struct nexthop *nexthop; | |
c52ef59f | 1045 | union g_addr prev_src; |
b892f1dd PJ |
1046 | unsigned int prev_active, new_active, old_num_nh; |
1047 | ifindex_t prev_index; | |
6e26278c | 1048 | old_num_nh = rib->nexthop_active_num; |
718e3744 | 1049 | |
1050 | rib->nexthop_active_num = 0; | |
2f97fa65 | 1051 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
718e3744 | 1052 | |
1053 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1054 | { |
c52ef59f DS |
1055 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1056 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1057 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1058 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1059 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1060 | rib->nexthop_active_num++; | |
c52ef59f | 1061 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1062 | if (prev_active != new_active || |
c52ef59f DS |
1063 | prev_index != nexthop->ifindex || |
1064 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1065 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1066 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1067 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1068 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1069 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c | 1070 | { |
2b50b603 | 1071 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c DS |
1072 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1073 | } | |
03e232a4 | 1074 | } |
6e26278c DS |
1075 | |
1076 | if (old_num_nh != rib->nexthop_active_num) | |
2b50b603 | 1077 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c | 1078 | |
2b50b603 | 1079 | if (CHECK_FLAG (rib->status, RIB_ENTRY_CHANGED)) |
6e26278c DS |
1080 | { |
1081 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1082 | } | |
1083 | ||
718e3744 | 1084 | return rib->nexthop_active_num; |
1085 | } | |
6baeb988 | 1086 | |
a64448ba DS |
1087 | /* |
1088 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
1089 | * (nexthops) must have a label. | |
1090 | */ | |
1091 | int | |
1092 | zebra_rib_labeled_unicast (struct rib *rib) | |
1093 | { | |
1094 | struct nexthop *nexthop = NULL, *tnexthop; | |
1095 | int recursing; | |
1096 | ||
1097 | if (rib->type != ZEBRA_ROUTE_BGP) | |
1098 | return 0; | |
1099 | ||
1100 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1101 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) | |
1102 | return 0; | |
6b0655a2 | 1103 | |
a64448ba DS |
1104 | return 1; |
1105 | } | |
718e3744 | 1106 | |
6ae24471 DS |
1107 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1108 | * is only used for IPv4. | |
1109 | */ | |
28f6dde8 | 1110 | int |
949ae9ba | 1111 | rib_install_kernel (struct route_node *rn, struct rib *rib, struct rib *old) |
718e3744 | 1112 | { |
1113 | int ret = 0; | |
fa713d9e | 1114 | struct nexthop *nexthop, *tnexthop; |
05737783 | 1115 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
fa713d9e | 1116 | int recursing; |
05737783 CF |
1117 | struct prefix *p, *src_p; |
1118 | ||
1119 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
718e3744 | 1120 | |
416ec78d DL |
1121 | if (info->safi != SAFI_UNICAST) |
1122 | { | |
1123 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1124 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1125 | return ret; | |
1126 | } | |
1127 | ||
5adc2528 AS |
1128 | /* |
1129 | * Make sure we update the FPM any time we send new information to | |
1130 | * the kernel. | |
1131 | */ | |
4f8ea50c | 1132 | hook_call(rib_update, rn, "installing in kernel"); |
05737783 | 1133 | ret = kernel_route_rib (p, src_p, old, rib); |
718e3744 | 1134 | |
3e5c6e00 | 1135 | /* If install succeeds, update FIB flag for nexthops. */ |
1136 | if (!ret) | |
718e3744 | 1137 | { |
fa713d9e | 1138 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1139 | { |
1140 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1141 | continue; | |
1142 | ||
1143 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1144 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1145 | else | |
1146 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1147 | } | |
718e3744 | 1148 | } |
3e5c6e00 | 1149 | |
1150 | return ret; | |
718e3744 | 1151 | } |
1152 | ||
1153 | /* Uninstall the route from kernel. */ | |
28f6dde8 | 1154 | int |
718e3744 | 1155 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1156 | { | |
1157 | int ret = 0; | |
fa713d9e | 1158 | struct nexthop *nexthop, *tnexthop; |
05737783 | 1159 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
fa713d9e | 1160 | int recursing; |
05737783 CF |
1161 | struct prefix *p, *src_p; |
1162 | ||
1163 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
718e3744 | 1164 | |
416ec78d DL |
1165 | if (info->safi != SAFI_UNICAST) |
1166 | { | |
1167 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1168 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1169 | return ret; | |
1170 | } | |
1171 | ||
5adc2528 AS |
1172 | /* |
1173 | * Make sure we update the FPM any time we send new information to | |
1174 | * the kernel. | |
1175 | */ | |
4f8ea50c | 1176 | hook_call(rib_update, rn, "uninstalling from kernel"); |
05737783 | 1177 | ret = kernel_route_rib (p, src_p, rib, NULL); |
718e3744 | 1178 | |
fa713d9e | 1179 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1180 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1181 | ||
1182 | return ret; | |
1183 | } | |
1184 | ||
1185 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1186 | static void |
718e3744 | 1187 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1188 | { | |
05737783 | 1189 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
416ec78d | 1190 | |
446bb95e | 1191 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
718e3744 | 1192 | { |
416ec78d | 1193 | if (info->safi == SAFI_UNICAST) |
4f8ea50c | 1194 | hook_call(rib_update, rn, "rib_uninstall"); |
5adc2528 | 1195 | |
718e3744 | 1196 | if (! RIB_SYSTEM_ROUTE (rib)) |
1197 | rib_uninstall_kernel (rn, rib); | |
a64448ba DS |
1198 | |
1199 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1200 | if (zebra_rib_labeled_unicast (rib)) | |
1201 | zebra_mpls_lsp_uninstall (info->zvrf, rn, rib); | |
1202 | ||
1203 | UNSET_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB); | |
446bb95e TT |
1204 | } |
1205 | ||
1206 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1207 | { | |
05737783 CF |
1208 | struct prefix *p, *src_p; |
1209 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
1210 | ||
1211 | redistribute_delete (p, src_p, rib); | |
718e3744 | 1212 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); |
1213 | } | |
1214 | } | |
1215 | ||
9fd92e3c AS |
1216 | /* |
1217 | * rib_can_delete_dest | |
1218 | * | |
1219 | * Returns TRUE if the given dest can be deleted from the table. | |
1220 | */ | |
1221 | static int | |
1222 | rib_can_delete_dest (rib_dest_t *dest) | |
1223 | { | |
1224 | if (dest->routes) | |
1225 | { | |
1226 | return 0; | |
1227 | } | |
1228 | ||
5adc2528 AS |
1229 | /* |
1230 | * Don't delete the dest if we have to update the FPM about this | |
1231 | * prefix. | |
1232 | */ | |
1233 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1234 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1235 | return 0; | |
1236 | ||
9fd92e3c AS |
1237 | return 1; |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * rib_gc_dest | |
1242 | * | |
1243 | * Garbage collect the rib dest corresponding to the given route node | |
1244 | * if appropriate. | |
1245 | * | |
1246 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1247 | */ | |
1248 | int | |
1249 | rib_gc_dest (struct route_node *rn) | |
1250 | { | |
1251 | rib_dest_t *dest; | |
41ec9222 | 1252 | struct zebra_vrf *zvrf; |
9fd92e3c AS |
1253 | |
1254 | dest = rib_dest_from_rnode (rn); | |
1255 | if (!dest) | |
1256 | return 0; | |
1257 | ||
1258 | if (!rib_can_delete_dest (dest)) | |
1259 | return 0; | |
1260 | ||
41ec9222 | 1261 | zvrf = rib_dest_vrf (dest); |
2263a412 | 1262 | if (IS_ZEBRA_DEBUG_RIB) |
661512bf | 1263 | rnode_debug (rn, zvrf_id (zvrf), "removing dest from table"); |
9fd92e3c AS |
1264 | |
1265 | dest->rnode = NULL; | |
1266 | XFREE (MTYPE_RIB_DEST, dest); | |
1267 | rn->info = NULL; | |
1268 | ||
1269 | /* | |
1270 | * Release the one reference that we keep on the route node. | |
1271 | */ | |
1272 | route_unlock_node (rn); | |
1273 | return 1; | |
1274 | } | |
1275 | ||
3e5c6e00 | 1276 | static void |
446bb95e TT |
1277 | rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1278 | struct rib *new) | |
3e5c6e00 | 1279 | { |
4f8ea50c | 1280 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 1281 | |
1282 | /* Update real nexthop. This may actually determine if nexthop is active or not. */ | |
446bb95e | 1283 | if (!nexthop_active_update (rn, new, 1)) |
3e5c6e00 | 1284 | { |
446bb95e | 1285 | UNSET_FLAG(new->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1286 | return; |
1287 | } | |
1288 | ||
446bb95e | 1289 | SET_FLAG (new->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1290 | if (IS_ZEBRA_DEBUG_RIB) |
1291 | { | |
05737783 CF |
1292 | char buf[SRCDEST2STR_BUFFER]; |
1293 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1294 | zlog_debug ("%u:%s: Adding route rn %p, rib %p (type %d)", | |
1295 | zvrf_id (zvrf), buf, rn, new, new->type); | |
3e5c6e00 | 1296 | } |
1297 | ||
a64448ba DS |
1298 | /* If labeled-unicast route, install transit LSP. */ |
1299 | if (zebra_rib_labeled_unicast (new)) | |
1300 | zebra_mpls_lsp_install (zvrf, rn, new); | |
1301 | ||
446bb95e | 1302 | if (!RIB_SYSTEM_ROUTE (new)) |
3e5c6e00 | 1303 | { |
949ae9ba | 1304 | if (rib_install_kernel (rn, new, NULL)) |
3e5c6e00 | 1305 | { |
05737783 CF |
1306 | char buf[SRCDEST2STR_BUFFER]; |
1307 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1308 | zlog_warn ("%u:%s: Route install failed", | |
1309 | zvrf_id (zvrf), buf); | |
3e5c6e00 | 1310 | } |
1311 | } | |
1312 | ||
446bb95e | 1313 | UNSET_FLAG(new->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1314 | } |
1315 | ||
1316 | static void | |
446bb95e TT |
1317 | rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1318 | struct rib *old) | |
3e5c6e00 | 1319 | { |
4f8ea50c | 1320 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 1321 | |
446bb95e | 1322 | /* Uninstall from kernel. */ |
3e5c6e00 | 1323 | if (IS_ZEBRA_DEBUG_RIB) |
1324 | { | |
05737783 CF |
1325 | char buf[SRCDEST2STR_BUFFER]; |
1326 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1327 | zlog_debug ("%u:%s: Deleting route rn %p, rib %p (type %d)", | |
1328 | zvrf_id (zvrf), buf, rn, old, old->type); | |
3e5c6e00 | 1329 | } |
1330 | ||
a64448ba DS |
1331 | /* If labeled-unicast route, uninstall transit LSP. */ |
1332 | if (zebra_rib_labeled_unicast (old)) | |
1333 | zebra_mpls_lsp_uninstall (zvrf, rn, old); | |
1334 | ||
446bb95e TT |
1335 | if (!RIB_SYSTEM_ROUTE (old)) |
1336 | rib_uninstall_kernel (rn, old); | |
3e5c6e00 | 1337 | |
446bb95e | 1338 | UNSET_FLAG (old->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1339 | |
1340 | /* Update nexthop for route, reset changed flag. */ | |
446bb95e TT |
1341 | nexthop_active_update (rn, old, 1); |
1342 | UNSET_FLAG(old->status, RIB_ENTRY_CHANGED); | |
3e5c6e00 | 1343 | } |
1344 | ||
1345 | static void | |
446bb95e TT |
1346 | rib_process_update_fib (struct zebra_vrf *zvrf, struct route_node *rn, |
1347 | struct rib *old, struct rib *new) | |
3e5c6e00 | 1348 | { |
3e5c6e00 | 1349 | struct nexthop *nexthop = NULL, *tnexthop; |
1350 | int recursing; | |
1351 | int nh_active = 0; | |
1352 | int installed = 1; | |
1353 | ||
3e5c6e00 | 1354 | /* |
1355 | * We have to install or update if a new route has been selected or | |
1356 | * something has changed. | |
1357 | */ | |
446bb95e TT |
1358 | if (new != old || |
1359 | CHECK_FLAG (new->status, RIB_ENTRY_CHANGED)) | |
3e5c6e00 | 1360 | { |
4f8ea50c | 1361 | hook_call(rib_update, rn, "updating existing route"); |
3e5c6e00 | 1362 | |
1363 | /* Update the nexthop; we could determine here that nexthop is inactive. */ | |
446bb95e | 1364 | if (nexthop_active_update (rn, new, 1)) |
3e5c6e00 | 1365 | nh_active = 1; |
1366 | ||
1367 | /* If nexthop is active, install the selected route, if appropriate. If | |
1368 | * the install succeeds, cleanup flags for prior route, if different from | |
1369 | * newly selected. | |
1370 | */ | |
1371 | if (nh_active) | |
1372 | { | |
1373 | if (IS_ZEBRA_DEBUG_RIB) | |
1374 | { | |
05737783 CF |
1375 | char buf[SRCDEST2STR_BUFFER]; |
1376 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
446bb95e | 1377 | if (new != old) |
05737783 CF |
1378 | zlog_debug ("%u:%s: Updating route rn %p, rib %p (type %d) " |
1379 | "old %p (type %d)", zvrf_id (zvrf), buf, | |
446bb95e | 1380 | rn, new, new->type, old, old->type); |
3e5c6e00 | 1381 | else |
05737783 CF |
1382 | zlog_debug ("%u:%s: Updating route rn %p, rib %p (type %d)", |
1383 | zvrf_id (zvrf), buf, rn, new, new->type); | |
3e5c6e00 | 1384 | } |
71e04b9f DW |
1385 | |
1386 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1387 | if (zebra_rib_labeled_unicast (old)) | |
1388 | zebra_mpls_lsp_uninstall (zvrf, rn, old); | |
1389 | ||
3e5c6e00 | 1390 | /* Non-system route should be installed. */ |
446bb95e | 1391 | if (!RIB_SYSTEM_ROUTE (new)) |
3e5c6e00 | 1392 | { |
a64448ba DS |
1393 | /* If labeled-unicast route, install transit LSP. */ |
1394 | if (zebra_rib_labeled_unicast (new)) | |
1395 | zebra_mpls_lsp_install (zvrf, rn, new); | |
1396 | ||
949ae9ba | 1397 | if (rib_install_kernel (rn, new, old)) |
3e5c6e00 | 1398 | { |
05737783 CF |
1399 | char buf[SRCDEST2STR_BUFFER]; |
1400 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
3e5c6e00 | 1401 | installed = 0; |
05737783 | 1402 | zlog_warn ("%u:%s: Route install failed", zvrf_id (zvrf), buf); |
3e5c6e00 | 1403 | } |
1404 | } | |
1405 | ||
1406 | /* If install succeeded or system route, cleanup flags for prior route. */ | |
446bb95e | 1407 | if (installed && new != old) |
3e5c6e00 | 1408 | { |
446bb95e | 1409 | if (RIB_SYSTEM_ROUTE(new)) |
3e5c6e00 | 1410 | { |
446bb95e TT |
1411 | if (!RIB_SYSTEM_ROUTE (old)) |
1412 | rib_uninstall_kernel (rn, old); | |
3e5c6e00 | 1413 | } |
1414 | else | |
1415 | { | |
446bb95e | 1416 | for (nexthop = old->nexthop; nexthop; nexthop = nexthop->next) |
3e5c6e00 | 1417 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1418 | } | |
3e5c6e00 | 1419 | } |
1420 | ||
1421 | /* Update for redistribution. */ | |
1422 | if (installed) | |
446bb95e | 1423 | SET_FLAG (new->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1424 | } |
1425 | ||
1426 | /* | |
1427 | * If nexthop for selected route is not active or install failed, we | |
1428 | * may need to uninstall and delete for redistribution. | |
1429 | */ | |
1430 | if (!nh_active || !installed) | |
1431 | { | |
3e5c6e00 | 1432 | if (IS_ZEBRA_DEBUG_RIB) |
1433 | { | |
05737783 CF |
1434 | char buf[SRCDEST2STR_BUFFER]; |
1435 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
446bb95e | 1436 | if (new != old) |
05737783 CF |
1437 | zlog_debug ("%u:%s: Deleting route rn %p, rib %p (type %d) " |
1438 | "old %p (type %d) - %s", zvrf_id (zvrf), buf, | |
446bb95e | 1439 | rn, new, new->type, old, old->type, |
3e5c6e00 | 1440 | nh_active ? "install failed" : "nexthop inactive"); |
1441 | else | |
05737783 CF |
1442 | zlog_debug ("%u:%s: Deleting route rn %p, rib %p (type %d) - %s", |
1443 | zvrf_id (zvrf), buf, rn, new, new->type, | |
3e5c6e00 | 1444 | nh_active ? "install failed" : "nexthop inactive"); |
1445 | } | |
1446 | ||
a64448ba DS |
1447 | /* If labeled-unicast route, uninstall transit LSP. */ |
1448 | if (zebra_rib_labeled_unicast (old)) | |
1449 | zebra_mpls_lsp_uninstall (zvrf, rn, old); | |
1450 | ||
446bb95e TT |
1451 | if (!RIB_SYSTEM_ROUTE (old)) |
1452 | rib_uninstall_kernel (rn, old); | |
1453 | UNSET_FLAG (new->status, RIB_ENTRY_SELECTED_FIB); | |
3e5c6e00 | 1454 | } |
1455 | } | |
1456 | else | |
1457 | { | |
1458 | /* | |
1459 | * Same route selected; check if in the FIB and if not, re-install. This | |
1460 | * is housekeeping code to deal with race conditions in kernel with linux | |
1461 | * netlink reporting interface up before IPv4 or IPv6 protocol is ready | |
1462 | * to add routes. | |
1463 | */ | |
446bb95e | 1464 | if (!RIB_SYSTEM_ROUTE (new)) |
3e5c6e00 | 1465 | { |
1466 | int in_fib = 0; | |
1467 | ||
446bb95e | 1468 | for (ALL_NEXTHOPS_RO(new->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1469 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1470 | { | |
1471 | in_fib = 1; | |
1472 | break; | |
1473 | } | |
1474 | if (!in_fib) | |
949ae9ba | 1475 | rib_install_kernel (rn, new, NULL); |
3e5c6e00 | 1476 | } |
1477 | } | |
1478 | ||
1479 | /* Update prior route. */ | |
446bb95e | 1480 | if (new != old) |
3e5c6e00 | 1481 | { |
446bb95e | 1482 | UNSET_FLAG (old->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1483 | |
1484 | /* Set real nexthop. */ | |
446bb95e TT |
1485 | nexthop_active_update (rn, old, 1); |
1486 | UNSET_FLAG(old->status, RIB_ENTRY_CHANGED); | |
3e5c6e00 | 1487 | } |
1488 | ||
1489 | /* Clear changed flag. */ | |
446bb95e | 1490 | UNSET_FLAG(new->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1491 | } |
1492 | ||
bab85d4f CF |
1493 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1494 | static struct rib * | |
1495 | rib_choose_best (struct rib *current, struct rib *alternate) | |
1496 | { | |
1497 | if (current == NULL) | |
1498 | return alternate; | |
1499 | ||
1500 | /* filter route selection in following order: | |
1501 | * - connected beats other types | |
1502 | * - lower distance beats higher | |
1503 | * - lower metric beats higher for equal distance | |
1504 | * - last, hence oldest, route wins tie break. | |
1505 | */ | |
1506 | ||
1507 | /* Connected routes. Pick the last connected | |
1508 | * route of the set of lowest metric connected routes. | |
1509 | */ | |
1510 | if (alternate->type == ZEBRA_ROUTE_CONNECT) | |
1511 | { | |
1512 | if (current->type != ZEBRA_ROUTE_CONNECT | |
1513 | || alternate->metric <= current->metric) | |
1514 | return alternate; | |
1515 | ||
1516 | return current; | |
1517 | } | |
1518 | ||
1519 | if (current->type == ZEBRA_ROUTE_CONNECT) | |
1520 | return current; | |
1521 | ||
1522 | /* higher distance loses */ | |
1523 | if (alternate->distance < current->distance) | |
1524 | return alternate; | |
1525 | if (current->distance < alternate->distance) | |
1526 | return current; | |
1527 | ||
1528 | /* metric tie-breaks equal distance */ | |
1529 | if (alternate->metric <= current->metric) | |
1530 | return alternate; | |
1531 | ||
1532 | return current; | |
1533 | } | |
1534 | ||
718e3744 | 1535 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1536 | static void |
1537 | rib_process (struct route_node *rn) | |
718e3744 | 1538 | { |
1539 | struct rib *rib; | |
1540 | struct rib *next; | |
446bb95e TT |
1541 | struct rib *old_selected = NULL; |
1542 | struct rib *new_selected = NULL; | |
1543 | struct rib *old_fib = NULL; | |
1544 | struct rib *new_fib = NULL; | |
bab85d4f | 1545 | struct rib *best = NULL; |
05737783 | 1546 | char buf[SRCDEST2STR_BUFFER]; |
41ec9222 | 1547 | rib_dest_t *dest; |
1548 | struct zebra_vrf *zvrf = NULL; | |
05737783 CF |
1549 | struct prefix *p, *src_p; |
1550 | srcdest_rnode_prefixes(rn, &p, &src_p); | |
58255d34 | 1551 | vrf_id_t vrf_id = VRF_UNKNOWN; |
41ec9222 | 1552 | |
4d38fdb4 | 1553 | assert (rn); |
446bb95e | 1554 | |
41ec9222 | 1555 | dest = rib_dest_from_rnode (rn); |
1556 | if (dest) | |
1557 | { | |
1558 | zvrf = rib_dest_vrf (dest); | |
661512bf | 1559 | vrf_id = zvrf_id (zvrf); |
41ec9222 | 1560 | } |
446bb95e | 1561 | |
41ec9222 | 1562 | if (IS_ZEBRA_DEBUG_RIB) |
05737783 | 1563 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
93bdadae | 1564 | |
41ec9222 | 1565 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
05737783 | 1566 | zlog_debug ("%u:%s: Processing rn %p", vrf_id, buf, rn); |
41ec9222 | 1567 | |
7b25dca6 | 1568 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1569 | { |
41ec9222 | 1570 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
05737783 | 1571 | zlog_debug ("%u:%s: Examine rib %p (type %d) status %x flags %x " |
41ec9222 | 1572 | "dist %d metric %d", |
05737783 | 1573 | vrf_id, buf, rib, rib->type, rib->status, |
41ec9222 | 1574 | rib->flags, rib->distance, rib->metric); |
1575 | ||
6e26278c DS |
1576 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1577 | ||
446bb95e | 1578 | /* Currently selected rib. */ |
718e3744 | 1579 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
6d691129 | 1580 | { |
446bb95e TT |
1581 | assert (old_selected == NULL); |
1582 | old_selected = rib; | |
6d691129 | 1583 | } |
446bb95e TT |
1584 | /* Currently in fib */ |
1585 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) | |
510dc060 | 1586 | { |
446bb95e TT |
1587 | assert (old_fib == NULL); |
1588 | old_fib = rib; | |
510dc060 | 1589 | } |
446bb95e TT |
1590 | |
1591 | /* Skip deleted entries from selection */ | |
1592 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1593 | continue; | |
1594 | ||
718e3744 | 1595 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1596 | /* This first call to nexthop_active_update is merely to determine if |
1597 | * there's any change to nexthops associated with this RIB entry. Now, | |
1598 | * rib_process() can be invoked due to an external event such as link | |
1599 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1600 | * a decision has already been made that the NHs have changed. So, no | |
1601 | * need to invoke a potentially expensive call again. Further, since | |
1602 | * the change might be in a recursive NH which is not caught in | |
1603 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1604 | * recursive NHs. | |
6e26278c | 1605 | */ |
2b50b603 | 1606 | if (!CHECK_FLAG(rib->status, RIB_ENTRY_CHANGED) && |
f857321e DW |
1607 | ! nexthop_active_update (rn, rib, 0)) |
1608 | { | |
1609 | if (rib->type == ZEBRA_ROUTE_TABLE) | |
1610 | { | |
446bb95e TT |
1611 | /* XXX: HERE BE DRAGONS!!!!! |
1612 | * In all honesty, I have not yet figured out what this part | |
1613 | * does or why the RIB_ENTRY_CHANGED test above is correct | |
1614 | * or why we need to delete a route here, and also not whether | |
1615 | * this concerns both selected and fib route, or only selected | |
1616 | * or only fib */ | |
f857321e DW |
1617 | /* This entry was denied by the 'ip protocol table' route-map, we |
1618 | * need to delete it */ | |
446bb95e | 1619 | if (rib != old_selected) |
f857321e DW |
1620 | { |
1621 | if (IS_ZEBRA_DEBUG_RIB) | |
05737783 | 1622 | zlog_debug ("%s: %s: imported via import-table but denied " |
f857321e | 1623 | "by the ip protocol table route-map", |
05737783 | 1624 | __func__, buf); |
f857321e DW |
1625 | rib_unlink (rn, rib); |
1626 | } | |
1627 | else | |
446bb95e | 1628 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
f857321e DW |
1629 | } |
1630 | ||
1631 | continue; | |
1632 | } | |
718e3744 | 1633 | |
f857321e | 1634 | /* Infinite distance. */ |
718e3744 | 1635 | if (rib->distance == DISTANCE_INFINITY) |
8733ba72 | 1636 | { |
2b50b603 | 1637 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1638 | continue; |
1639 | } | |
718e3744 | 1640 | |
446bb95e TT |
1641 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_FIB_OVERRIDE)) |
1642 | { | |
1643 | best = rib_choose_best(new_fib, rib); | |
1644 | if (new_fib && best != new_fib) | |
1645 | UNSET_FLAG (new_fib->status, RIB_ENTRY_CHANGED); | |
1646 | new_fib = best; | |
1647 | } | |
1648 | else | |
1649 | { | |
1650 | best = rib_choose_best(new_selected, rib); | |
1651 | if (new_selected && best != new_selected) | |
1652 | UNSET_FLAG (new_selected->status, RIB_ENTRY_CHANGED); | |
1653 | new_selected = best; | |
1654 | } | |
bab85d4f CF |
1655 | if (best != rib) |
1656 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
446bb95e TT |
1657 | } /* RNODE_FOREACH_RIB */ |
1658 | ||
1659 | /* If no FIB override route, use the selected route also for FIB */ | |
1660 | if (new_fib == NULL) | |
1661 | new_fib = new_selected; | |
dc95824a DO |
1662 | |
1663 | /* After the cycle is finished, the following pointers will be set: | |
446bb95e TT |
1664 | * old_selected --- RIB entry currently having SELECTED |
1665 | * new_selected --- RIB entry that is newly SELECTED | |
1666 | * old_fib --- RIB entry currently in kernel FIB | |
1667 | * new_fib --- RIB entry that is newly to be in kernel FIB | |
1668 | * | |
1669 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1670 | * the zclients. new_fib (which can be new_selected) will be installed in kernel. | |
dc95824a | 1671 | */ |
446bb95e | 1672 | |
41ec9222 | 1673 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
446bb95e | 1674 | { |
05737783 CF |
1675 | zlog_debug ("%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", |
1676 | vrf_id, buf, | |
446bb95e TT |
1677 | (void *)old_selected, |
1678 | (void *)new_selected, | |
1679 | (void *)old_fib, | |
1680 | (void *)new_fib); | |
1681 | } | |
1682 | ||
1683 | /* Buffer RIB_ENTRY_CHANGED here, because it will get cleared if | |
1684 | * fib == selected */ | |
1685 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, | |
1686 | RIB_ENTRY_CHANGED); | |
1687 | ||
1688 | /* Update fib according to selection results */ | |
1689 | if (new_fib && old_fib) | |
1690 | rib_process_update_fib (zvrf, rn, old_fib, new_fib); | |
1691 | else if (new_fib) | |
1692 | rib_process_add_fib (zvrf, rn, new_fib); | |
1693 | else if (old_fib) | |
1694 | rib_process_del_fib (zvrf, rn, old_fib); | |
1695 | ||
1696 | /* Redistribute SELECTED entry */ | |
1697 | if (old_selected != new_selected || selected_changed) | |
1698 | { | |
1699 | struct nexthop *nexthop, *tnexthop; | |
1700 | int recursing; | |
1701 | ||
1702 | /* Check if we have a FIB route for the destination, otherwise, | |
1703 | * don't redistribute it */ | |
1704 | for (ALL_NEXTHOPS_RO(new_fib ? new_fib->nexthop : NULL, nexthop, | |
1705 | tnexthop, recursing)) | |
1706 | { | |
1707 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1708 | { | |
1709 | break; | |
1710 | } | |
1711 | } | |
1712 | if (!nexthop) | |
1713 | new_selected = NULL; | |
dc95824a | 1714 | |
446bb95e TT |
1715 | if (new_selected && new_selected != new_fib) |
1716 | { | |
1717 | nexthop_active_update(rn, new_selected, 1); | |
1718 | UNSET_FLAG(new_selected->status, RIB_ENTRY_CHANGED); | |
1719 | } | |
1720 | ||
1721 | if (old_selected) | |
1722 | { | |
1723 | if (!new_selected) | |
05737783 | 1724 | redistribute_delete(p, src_p, old_selected); |
446bb95e TT |
1725 | if (old_selected != new_selected) |
1726 | UNSET_FLAG (old_selected->flags, ZEBRA_FLAG_SELECTED); | |
1727 | } | |
1728 | ||
1729 | if (new_selected) | |
1730 | { | |
1731 | /* Install new or replace existing redistributed entry */ | |
1732 | SET_FLAG (new_selected->flags, ZEBRA_FLAG_SELECTED); | |
05737783 | 1733 | redistribute_update (p, src_p, new_selected, old_selected); |
446bb95e TT |
1734 | } |
1735 | } | |
3e5c6e00 | 1736 | |
446bb95e TT |
1737 | /* Remove all RIB entries queued for removal */ |
1738 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
6d691129 | 1739 | { |
446bb95e TT |
1740 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
1741 | { | |
1742 | if (IS_ZEBRA_DEBUG_RIB) | |
1743 | { | |
1744 | rnode_debug (rn, vrf_id, "rn %p, removing rib %p", | |
1745 | (void *)rn, (void *)rib); | |
1746 | } | |
1747 | rib_unlink(rn, rib); | |
1748 | } | |
6d691129 | 1749 | } |
4d38fdb4 | 1750 | |
9fd92e3c AS |
1751 | /* |
1752 | * Check if the dest can be deleted now. | |
1753 | */ | |
1754 | rib_gc_dest (rn); | |
e96f9203 DO |
1755 | } |
1756 | ||
5110a0c6 SH |
1757 | /* Take a list of route_node structs and return 1, if there was a record |
1758 | * picked from it and processed by rib_process(). Don't process more, | |
1759 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1760 | */ |
ef9b113e | 1761 | static unsigned int |
e96f9203 DO |
1762 | process_subq (struct list * subq, u_char qindex) |
1763 | { | |
5110a0c6 | 1764 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1765 | struct route_node *rnode; |
41ec9222 | 1766 | rib_dest_t *dest; |
1767 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 SH |
1768 | |
1769 | if (!lnode) | |
e96f9203 | 1770 | return 0; |
5110a0c6 | 1771 | |
e96f9203 | 1772 | rnode = listgetdata (lnode); |
41ec9222 | 1773 | dest = rib_dest_from_rnode (rnode); |
1774 | if (dest) | |
1775 | zvrf = rib_dest_vrf (dest); | |
1776 | ||
e96f9203 | 1777 | rib_process (rnode); |
5110a0c6 | 1778 | |
41ec9222 | 1779 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1780 | { | |
05737783 CF |
1781 | char buf[SRCDEST2STR_BUFFER]; |
1782 | srcdest_rnode2str(rnode, buf, sizeof(buf)); | |
1783 | zlog_debug ("%u:%s: rn %p dequeued from sub-queue %u", | |
1784 | zvrf ? zvrf_id (zvrf) : 0, buf, rnode, qindex); | |
41ec9222 | 1785 | } |
1786 | ||
9fd92e3c AS |
1787 | if (rnode->info) |
1788 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1789 | ||
67b9467f | 1790 | #if 0 |
5110a0c6 SH |
1791 | else |
1792 | { | |
1793 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1794 | __func__, rnode, rnode->lock); | |
1795 | zlog_backtrace(LOG_DEBUG); | |
1796 | } | |
67b9467f | 1797 | #endif |
e96f9203 DO |
1798 | route_unlock_node (rnode); |
1799 | list_delete_node (subq, lnode); | |
1800 | return 1; | |
1801 | } | |
1802 | ||
fb018d25 DS |
1803 | /* |
1804 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1805 | */ | |
1806 | static void | |
1807 | meta_queue_process_complete (struct work_queue *dummy) | |
1808 | { | |
1a1a7065 | 1809 | struct vrf *vrf; |
9ec6b0bb | 1810 | struct zebra_vrf *zvrf; |
1811 | ||
1812 | /* Evaluate nexthops for those VRFs which underwent route processing. This | |
1813 | * should limit the evaluation to the necessary VRFs in most common | |
1814 | * situations. | |
1815 | */ | |
1a1a7065 | 1816 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
9ec6b0bb | 1817 | { |
1a1a7065 RW |
1818 | zvrf = vrf->info; |
1819 | if (zvrf == NULL || !(zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
1820 | continue; | |
1821 | ||
1822 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
661512bf RW |
1823 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
1824 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
1825 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); | |
1826 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
9ec6b0bb | 1827 | } |
939fba27 | 1828 | |
1829 | /* Schedule LSPs for processing, if needed. */ | |
1830 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1831 | if (mpls_should_lsps_be_processed(zvrf)) | |
1832 | { | |
1833 | if (IS_ZEBRA_DEBUG_MPLS) | |
661512bf | 1834 | zlog_debug ("%u: Scheduling all LSPs upon RIB completion", zvrf_id (zvrf)); |
939fba27 | 1835 | zebra_mpls_lsp_schedule (zvrf); |
1836 | mpls_unmark_lsps_for_processing(zvrf); | |
1837 | } | |
fb018d25 DS |
1838 | } |
1839 | ||
e96f9203 DO |
1840 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1841 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1842 | * is pointed to the meta queue structure. | |
1843 | */ | |
1844 | static wq_item_status | |
1845 | meta_queue_process (struct work_queue *dummy, void *data) | |
1846 | { | |
1847 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1848 | unsigned i; |
1849 | ||
e96f9203 DO |
1850 | for (i = 0; i < MQ_SIZE; i++) |
1851 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1852 | { |
1853 | mq->size--; | |
1854 | break; | |
1855 | } | |
e96f9203 DO |
1856 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1857 | } | |
1858 | ||
9fd92e3c AS |
1859 | /* |
1860 | * Map from rib types to queue type (priority) in meta queue | |
1861 | */ | |
5110a0c6 SH |
1862 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1863 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1864 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1865 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1866 | [ZEBRA_ROUTE_STATIC] = 1, | |
1867 | [ZEBRA_ROUTE_RIP] = 2, | |
1868 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1869 | [ZEBRA_ROUTE_OSPF] = 2, | |
1870 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1871 | [ZEBRA_ROUTE_ISIS] = 2, | |
2fb975da | 1872 | [ZEBRA_ROUTE_NHRP] = 2, |
5110a0c6 SH |
1873 | [ZEBRA_ROUTE_BGP] = 3, |
1874 | [ZEBRA_ROUTE_HSLS] = 4, | |
7a4bb9c5 | 1875 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
1876 | }; |
1877 | ||
1878 | /* Look into the RN and queue it into one or more priority queues, | |
1879 | * increasing the size for each data push done. | |
e96f9203 | 1880 | */ |
ef9b113e SH |
1881 | static void |
1882 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1883 | { |
e96f9203 | 1884 | struct rib *rib; |
5110a0c6 | 1885 | |
9fd92e3c | 1886 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1887 | { |
5110a0c6 | 1888 | u_char qindex = meta_queue_map[rib->type]; |
9ec6b0bb | 1889 | struct zebra_vrf *zvrf; |
5110a0c6 SH |
1890 | |
1891 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1892 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1893 | RIB_ROUTE_QUEUED (qindex))) | |
2263a412 DL |
1894 | { |
1895 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1896 | rnode_debug (rn, rib->vrf_id, "rn %p is already queued in sub-queue %u", | |
6c4f4e6e | 1897 | (void *)rn, qindex); |
2263a412 DL |
1898 | continue; |
1899 | } | |
5110a0c6 | 1900 | |
9fd92e3c | 1901 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1902 | listnode_add (mq->subq[qindex], rn); |
1903 | route_lock_node (rn); | |
1904 | mq->size++; | |
1905 | ||
41ec9222 | 1906 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 1907 | rnode_debug (rn, rib->vrf_id, "queued rn %p into sub-queue %u", |
6c4f4e6e | 1908 | (void *)rn, qindex); |
9ec6b0bb | 1909 | |
5f3d1bdf | 1910 | zvrf = zebra_vrf_lookup_by_id (rib->vrf_id); |
9ec6b0bb | 1911 | if (zvrf) |
1912 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
e96f9203 | 1913 | } |
4d38fdb4 | 1914 | } |
1915 | ||
6d691129 | 1916 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 1917 | void |
44e9909d | 1918 | rib_queue_add (struct route_node *rn) |
4d38fdb4 | 1919 | { |
44e9909d | 1920 | assert (rn); |
4d38fdb4 | 1921 | |
fc328ac9 | 1922 | /* Pointless to queue a route_node with no RIB entries to add or remove */ |
9fd92e3c | 1923 | if (!rnode_to_ribs (rn)) |
6d691129 | 1924 | { |
fc328ac9 | 1925 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
6c4f4e6e | 1926 | __func__, (void *)rn, rn->lock); |
fc328ac9 SV |
1927 | zlog_backtrace(LOG_DEBUG); |
1928 | return; | |
1929 | } | |
1930 | ||
44e9909d | 1931 | if (zebrad.ribq == NULL) |
fc328ac9 SV |
1932 | { |
1933 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1934 | return; | |
4d38fdb4 | 1935 | } |
4d38fdb4 | 1936 | |
cc2dd928 SH |
1937 | /* |
1938 | * The RIB queue should normally be either empty or holding the only | |
1939 | * work_queue_item element. In the latter case this element would | |
1940 | * hold a pointer to the meta queue structure, which must be used to | |
1941 | * actually queue the route nodes to process. So create the MQ | |
1942 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1943 | * This semantics was introduced after 0.99.9 release. |
1944 | */ | |
44e9909d DS |
1945 | if (!zebrad.ribq->items->count) |
1946 | work_queue_add (zebrad.ribq, zebrad.mq); | |
e96f9203 | 1947 | |
44e9909d | 1948 | rib_meta_queue_add (zebrad.mq, rn); |
fc328ac9 | 1949 | |
fc328ac9 | 1950 | return; |
4d38fdb4 | 1951 | } |
1952 | ||
5110a0c6 SH |
1953 | /* Create new meta queue. |
1954 | A destructor function doesn't seem to be necessary here. | |
1955 | */ | |
ef9b113e SH |
1956 | static struct meta_queue * |
1957 | meta_queue_new (void) | |
e96f9203 DO |
1958 | { |
1959 | struct meta_queue *new; | |
5110a0c6 SH |
1960 | unsigned i; |
1961 | ||
1962 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1963 | assert(new); | |
e96f9203 | 1964 | |
e96f9203 | 1965 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1966 | { |
1967 | new->subq[i] = list_new (); | |
1968 | assert(new->subq[i]); | |
1969 | } | |
1970 | ||
e96f9203 DO |
1971 | return new; |
1972 | } | |
1973 | ||
5a8dfcd8 RW |
1974 | void |
1975 | meta_queue_free (struct meta_queue *mq) | |
1976 | { | |
1977 | unsigned i; | |
1978 | ||
1979 | for (i = 0; i < MQ_SIZE; i++) | |
1980 | list_delete (mq->subq[i]); | |
1981 | ||
1982 | XFREE (MTYPE_WORK_QUEUE, mq); | |
1983 | } | |
1984 | ||
4d38fdb4 | 1985 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1986 | static void |
4d38fdb4 | 1987 | rib_queue_init (struct zebra_t *zebra) |
1988 | { | |
fc328ac9 SV |
1989 | assert (zebra); |
1990 | ||
4d38fdb4 | 1991 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 1992 | "route_node processing"))) |
4d38fdb4 | 1993 | { |
6d691129 | 1994 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 1995 | return; |
1996 | } | |
1997 | ||
1998 | /* fill in the work queue spec */ | |
e96f9203 | 1999 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 2000 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2001 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2002 | /* XXX: TODO: These should be runtime configurable via vty */ |
2003 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2004 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2005 | |
e96f9203 | 2006 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2007 | { |
e96f9203 | 2008 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2009 | return; |
2010 | } | |
2011 | return; | |
718e3744 | 2012 | } |
2013 | ||
6d691129 PJ |
2014 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2015 | * | |
2016 | * The queue length is bounded by the maximal size of the routing table, | |
2017 | * as a route_node will not be requeued, if already queued. | |
2018 | * | |
3c0755dc | 2019 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
bcd548ff | 2020 | * state, or static_install_route (when an existing RIB is updated) |
3c0755dc PJ |
2021 | * and then submit route_node to queue for best-path selection later. |
2022 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2023 | * |
2024 | * Deleted RIBs are reaped during best-path selection. | |
2025 | * | |
2026 | * rib_addnode | |
2027 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2028 | * |-------->| | best RIB, if required |
2029 | * | | | |
2030 | * static_install->|->rib_addqueue...... -> rib_process | |
2031 | * | | | |
2032 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2033 | * |-> set RIB_ENTRY_REMOVE | |
2034 | * rib_delnode (RIB freed) | |
2035 | * | |
9fd92e3c AS |
2036 | * The 'info' pointer of a route_node points to a rib_dest_t |
2037 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2038 | * dest is created on-demand by rib_link() and is kept around at least | |
2039 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2040 | * |
2041 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2042 | * | |
2043 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2044 | * - dest attached to route_node: |
2045 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2046 | * - route_node processing queue |
2047 | * - managed by: rib_addqueue, rib_process. | |
2048 | * | |
2049 | */ | |
2050 | ||
718e3744 | 2051 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2052 | static void |
2bf26d41 | 2053 | rib_link (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2054 | { |
2055 | struct rib *head; | |
9fd92e3c | 2056 | rib_dest_t *dest; |
7a4bb9c5 | 2057 | afi_t afi; |
8902474b | 2058 | const char *rmap_name; |
9fd92e3c | 2059 | |
4d38fdb4 | 2060 | assert (rib && rn); |
2061 | ||
9fd92e3c AS |
2062 | dest = rib_dest_from_rnode (rn); |
2063 | if (!dest) | |
6d691129 | 2064 | { |
41ec9222 | 2065 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2066 | rnode_debug (rn, rib->vrf_id, "rn %p adding dest", rn); |
9fd92e3c AS |
2067 | |
2068 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2069 | route_lock_node (rn); /* rn route table reference */ | |
2070 | rn->info = dest; | |
2071 | dest->rnode = rn; | |
2072 | } | |
2073 | ||
2074 | head = dest->routes; | |
2075 | if (head) | |
2076 | { | |
6d691129 | 2077 | head->prev = rib; |
6d691129 | 2078 | } |
718e3744 | 2079 | rib->next = head; |
9fd92e3c | 2080 | dest->routes = rib; |
7a4bb9c5 | 2081 | |
12f6fb97 DS |
2082 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2083 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2084 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
8902474b DS |
2085 | { |
2086 | rmap_name = zebra_get_import_table_route_map (afi, rib->table); | |
2087 | zebra_add_import_table_entry(rn, rib, rmap_name); | |
2088 | } | |
7a4bb9c5 | 2089 | else |
12f6fb97 | 2090 | if (process) |
44e9909d | 2091 | rib_queue_add (rn); |
718e3744 | 2092 | } |
2093 | ||
28f6dde8 | 2094 | void |
2bf26d41 | 2095 | rib_addnode (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2096 | { |
6d691129 PJ |
2097 | /* RIB node has been un-removed before route-node is processed. |
2098 | * route_node must hence already be on the queue for processing.. | |
2099 | */ | |
2100 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2101 | { | |
2263a412 | 2102 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2103 | rnode_debug (rn, rib->vrf_id, "rn %p, un-removed rib %p", (void *)rn, (void *)rib); |
2263a412 | 2104 | |
6d691129 PJ |
2105 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2106 | return; | |
2107 | } | |
2bf26d41 | 2108 | rib_link (rn, rib, process); |
6d691129 PJ |
2109 | } |
2110 | ||
9fd92e3c AS |
2111 | /* |
2112 | * rib_unlink | |
2113 | * | |
2114 | * Detach a rib structure from a route_node. | |
2115 | * | |
2116 | * Note that a call to rib_unlink() should be followed by a call to | |
2117 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2118 | * longer required to be deleted. | |
2119 | */ | |
5a8dfcd8 | 2120 | void |
6d691129 PJ |
2121 | rib_unlink (struct route_node *rn, struct rib *rib) |
2122 | { | |
9fd92e3c | 2123 | rib_dest_t *dest; |
6d691129 | 2124 | |
4d38fdb4 | 2125 | assert (rn && rib); |
6d691129 | 2126 | |
2263a412 | 2127 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2128 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p", (void *)rn, (void *)rib); |
2263a412 | 2129 | |
9fd92e3c AS |
2130 | dest = rib_dest_from_rnode (rn); |
2131 | ||
718e3744 | 2132 | if (rib->next) |
2133 | rib->next->prev = rib->prev; | |
6d691129 | 2134 | |
718e3744 | 2135 | if (rib->prev) |
2136 | rib->prev->next = rib->next; | |
2137 | else | |
6d691129 | 2138 | { |
9fd92e3c | 2139 | dest->routes = rib->next; |
6d691129 PJ |
2140 | } |
2141 | ||
2142 | /* free RIB and nexthops */ | |
d82ae0de | 2143 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, rib->nexthop, rn); |
a399694f | 2144 | nexthops_free(rib->nexthop); |
6d691129 PJ |
2145 | XFREE (MTYPE_RIB, rib); |
2146 | ||
6d691129 PJ |
2147 | } |
2148 | ||
28f6dde8 | 2149 | void |
6d691129 PJ |
2150 | rib_delnode (struct route_node *rn, struct rib *rib) |
2151 | { | |
7a4bb9c5 DS |
2152 | afi_t afi; |
2153 | ||
2263a412 | 2154 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2155 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p, removing", (void *)rn, (void *)rib); |
6d691129 | 2156 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 | 2157 | |
12f6fb97 DS |
2158 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2159 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2160 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
7a4bb9c5 | 2161 | { |
12f6fb97 | 2162 | zebra_del_import_table_entry(rn, rib); |
7a4bb9c5 | 2163 | /* Just clean up if non main table */ |
41ec9222 | 2164 | if (IS_ZEBRA_DEBUG_RIB) |
2165 | { | |
05737783 CF |
2166 | char buf[SRCDEST2STR_BUFFER]; |
2167 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2168 | zlog_debug ("%u:%s: Freeing route rn %p, rib %p (type %d)", | |
2169 | rib->vrf_id, buf, rn, rib, rib->type); | |
41ec9222 | 2170 | } |
2171 | ||
7a4bb9c5 DS |
2172 | rib_unlink(rn, rib); |
2173 | } | |
12f6fb97 DS |
2174 | else |
2175 | { | |
44e9909d | 2176 | rib_queue_add (rn); |
12f6fb97 | 2177 | } |
718e3744 | 2178 | } |
2179 | ||
dc95824a DO |
2180 | /* This function dumps the contents of a given RIB entry into |
2181 | * standard debug log. Calling function name and IP prefix in | |
2182 | * question are passed as 1st and 2nd arguments. | |
2183 | */ | |
2184 | ||
f7bf4153 | 2185 | void _rib_dump (const char * func, |
78b81eaa | 2186 | union prefixconstptr pp, |
2187 | union prefixconstptr src_pp, | |
05737783 | 2188 | const struct rib * rib) |
dc95824a | 2189 | { |
f7bf4153 | 2190 | const struct prefix *p = pp.p; |
05737783 CF |
2191 | const struct prefix *src_p = src_pp.p; |
2192 | bool is_srcdst = src_p && src_p->prefixlen; | |
35d921cc | 2193 | char straddr[PREFIX_STRLEN]; |
05737783 | 2194 | char srcaddr[PREFIX_STRLEN]; |
fa713d9e CF |
2195 | struct nexthop *nexthop, *tnexthop; |
2196 | int recursing; | |
dc95824a | 2197 | |
05737783 CF |
2198 | zlog_debug ("%s: dumping RIB entry %p for %s%s%s vrf %u", func, (const void *)rib, |
2199 | prefix2str(pp, straddr, sizeof(straddr)), | |
2200 | is_srcdst ? " from " : "", | |
2201 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) : "", | |
2202 | rib->vrf_id); | |
dc95824a DO |
2203 | zlog_debug |
2204 | ( | |
7c8ff89e | 2205 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2206 | func, |
2207 | rib->refcnt, | |
d02c56cd | 2208 | (unsigned long) rib->uptime, |
dc95824a | 2209 | rib->type, |
7c8ff89e | 2210 | rib->instance, |
dc95824a DO |
2211 | rib->table |
2212 | ); | |
2213 | zlog_debug | |
2214 | ( | |
c50ca33a | 2215 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", |
dc95824a DO |
2216 | func, |
2217 | rib->metric, | |
c50ca33a | 2218 | rib->mtu, |
dc95824a DO |
2219 | rib->distance, |
2220 | rib->flags, | |
2221 | rib->status | |
2222 | ); | |
2223 | zlog_debug | |
2224 | ( | |
e3edd1d1 | 2225 | "%s: nexthop_num == %u, nexthop_active_num == %u", |
dc95824a DO |
2226 | func, |
2227 | rib->nexthop_num, | |
e3edd1d1 | 2228 | rib->nexthop_active_num |
dc95824a | 2229 | ); |
fed643f4 | 2230 | |
fa713d9e CF |
2231 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2232 | { | |
fed643f4 | 2233 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2234 | zlog_debug |
2235 | ( | |
2236 | "%s: %s %s with flags %s%s%s", | |
2237 | func, | |
2238 | (recursing ? " NH" : "NH"), | |
2239 | straddr, | |
2240 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2241 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2242 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2243 | ); | |
2244 | } | |
dc95824a DO |
2245 | zlog_debug ("%s: dump complete", func); |
2246 | } | |
2247 | ||
2248 | /* This is an exported helper to rtm_read() to dump the strange | |
2249 | * RIB entry found by rib_lookup_ipv4_route() | |
2250 | */ | |
2251 | ||
12f6fb97 | 2252 | void rib_lookup_and_dump (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
dc95824a DO |
2253 | { |
2254 | struct route_table *table; | |
2255 | struct route_node *rn; | |
2256 | struct rib *rib; | |
2257 | char prefix_buf[INET_ADDRSTRLEN]; | |
2258 | ||
2259 | /* Lookup table. */ | |
12f6fb97 | 2260 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
2261 | if (! table) |
2262 | { | |
b72ede27 | 2263 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2264 | return; |
2265 | } | |
2266 | ||
dc95824a DO |
2267 | /* Scan the RIB table for exactly matching RIB entry. */ |
2268 | rn = route_node_lookup (table, (struct prefix *) p); | |
2269 | ||
2270 | /* No route for this prefix. */ | |
2271 | if (! rn) | |
2272 | { | |
35d921cc TT |
2273 | zlog_debug ("%s: lookup failed for %s", __func__, |
2274 | prefix2str((struct prefix*) p, prefix_buf, sizeof(prefix_buf))); | |
dc95824a DO |
2275 | return; |
2276 | } | |
2277 | ||
2278 | /* Unlock node. */ | |
2279 | route_unlock_node (rn); | |
2280 | ||
2281 | /* let's go */ | |
9fd92e3c | 2282 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2283 | { |
2284 | zlog_debug | |
2285 | ( | |
2286 | "%s: rn %p, rib %p: %s, %s", | |
2287 | __func__, | |
6c4f4e6e DL |
2288 | (void *)rn, |
2289 | (void *)rib, | |
dc95824a DO |
2290 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), |
2291 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2292 | ); | |
05737783 | 2293 | rib_dump (p, NULL, rib); |
dc95824a DO |
2294 | } |
2295 | } | |
2296 | ||
20e5ff0a DO |
2297 | /* Check if requested address assignment will fail due to another |
2298 | * route being installed by zebra in FIB already. Take necessary | |
2299 | * actions, if needed: remove such a route from FIB and deSELECT | |
2300 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2301 | */ | |
12f6fb97 | 2302 | void rib_lookup_and_pushup (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
20e5ff0a DO |
2303 | { |
2304 | struct route_table *table; | |
2305 | struct route_node *rn; | |
2306 | struct rib *rib; | |
2307 | unsigned changed = 0; | |
2308 | ||
12f6fb97 | 2309 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id))) |
20e5ff0a | 2310 | { |
b72ede27 | 2311 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2312 | return; |
2313 | } | |
2314 | ||
2315 | /* No matches would be the simplest case. */ | |
2316 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2317 | return; | |
2318 | ||
2319 | /* Unlock node. */ | |
2320 | route_unlock_node (rn); | |
2321 | ||
2322 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2323 | * the RN into RIBQ head. If the routing message about the new connected | |
2324 | * route (generated by the IP address we are going to assign very soon) | |
2325 | * comes before the RIBQ is processed, the new RIB entry will join | |
2326 | * RIBQ record already on head. This is necessary for proper revalidation | |
2327 | * of the rest of the RIB. | |
2328 | */ | |
9fd92e3c | 2329 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a | 2330 | { |
446bb95e | 2331 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB) && |
20e5ff0a DO |
2332 | ! RIB_SYSTEM_ROUTE (rib)) |
2333 | { | |
2334 | changed = 1; | |
2335 | if (IS_ZEBRA_DEBUG_RIB) | |
2336 | { | |
35d921cc TT |
2337 | char buf[PREFIX_STRLEN]; |
2338 | zlog_debug ("%u:%s: freeing way for connected prefix", | |
2339 | rib->vrf_id, prefix2str(&rn->p, buf, sizeof(buf))); | |
05737783 | 2340 | rib_dump (&rn->p, NULL, rib); |
20e5ff0a DO |
2341 | } |
2342 | rib_uninstall (rn, rib); | |
2343 | } | |
2344 | } | |
2345 | if (changed) | |
44e9909d | 2346 | rib_queue_add (rn); |
20e5ff0a DO |
2347 | } |
2348 | ||
718e3744 | 2349 | int |
b4c034b0 | 2350 | rib_add_multipath (afi_t afi, safi_t safi, struct prefix *p, |
3c7c91d0 | 2351 | struct prefix_ipv6 *src_p, struct rib *rib) |
718e3744 | 2352 | { |
2353 | struct route_table *table; | |
2354 | struct route_node *rn; | |
2355 | struct rib *same; | |
2356 | struct nexthop *nexthop; | |
04b02fda | 2357 | int ret = 0; |
b4c034b0 DS |
2358 | int family; |
2359 | ||
2360 | if (!rib) | |
2361 | return 0; | |
2362 | ||
2363 | if (p->family == AF_INET) | |
2364 | family = AFI_IP; | |
2365 | else | |
2366 | family = AFI_IP6; | |
2367 | ||
05737783 CF |
2368 | assert(!src_p || family == AFI_IP6); |
2369 | ||
718e3744 | 2370 | /* Lookup table. */ |
b4c034b0 | 2371 | table = zebra_vrf_table_with_table_id (family, safi, rib->vrf_id, rib->table); |
718e3744 | 2372 | if (! table) |
2373 | return 0; | |
cddf391b | 2374 | |
718e3744 | 2375 | /* Make it sure prefixlen is applied to the prefix. */ |
b4c034b0 | 2376 | apply_mask (p); |
05737783 CF |
2377 | if (src_p) |
2378 | apply_mask_ipv6 (src_p); | |
718e3744 | 2379 | |
2380 | /* Set default distance by route type. */ | |
2381 | if (rib->distance == 0) | |
2382 | { | |
2383 | rib->distance = route_info[rib->type].distance; | |
2384 | ||
2385 | /* iBGP distance is 200. */ | |
2386 | if (rib->type == ZEBRA_ROUTE_BGP | |
2387 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2388 | rib->distance = 200; | |
2389 | } | |
2390 | ||
2391 | /* Lookup route node.*/ | |
05737783 | 2392 | rn = srcdest_rnode_get (table, p, src_p); |
718e3744 | 2393 | |
2394 | /* If same type of route are installed, treat it as a implicit | |
2395 | withdraw. */ | |
9fd92e3c | 2396 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2397 | { |
0b8c4f1d | 2398 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2399 | continue; |
2400 | ||
7c8ff89e DS |
2401 | if (same->type == rib->type && same->instance == rib->instance |
2402 | && same->table == rib->table | |
718e3744 | 2403 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2404 | break; |
718e3744 | 2405 | } |
4d38fdb4 | 2406 | |
718e3744 | 2407 | /* If this route is kernel route, set FIB flag to the route. */ |
2408 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2409 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2410 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2411 | ||
2412 | /* Link new rib to node.*/ | |
41ec9222 | 2413 | if (IS_ZEBRA_DEBUG_RIB) |
2414 | { | |
05737783 CF |
2415 | rnode_debug(rn, rib->vrf_id, "Inserting route rn %p, rib %p (type %d) existing %p", |
2416 | (void *)rn, (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2417 | |
2418 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
05737783 | 2419 | rib_dump (p, src_p, rib); |
41ec9222 | 2420 | } |
2bf26d41 | 2421 | rib_addnode (rn, rib, 1); |
04b02fda | 2422 | ret = 1; |
718e3744 | 2423 | |
718e3744 | 2424 | /* Free implicit route.*/ |
2425 | if (same) | |
dc95824a | 2426 | { |
41ec9222 | 2427 | rib_delnode (rn, same); |
2428 | ret = -1; | |
dc95824a | 2429 | } |
4d38fdb4 | 2430 | |
2431 | route_unlock_node (rn); | |
04b02fda | 2432 | return ret; |
718e3744 | 2433 | } |
2434 | ||
265d5b9d | 2435 | void |
616368ed | 2436 | rib_delete (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance, |
3c7c91d0 DL |
2437 | int flags, struct prefix *p, struct prefix_ipv6 *src_p, |
2438 | union g_addr *gate, ifindex_t ifindex, u_int32_t table_id) | |
718e3744 | 2439 | { |
2440 | struct route_table *table; | |
2441 | struct route_node *rn; | |
2442 | struct rib *rib; | |
2443 | struct rib *fib = NULL; | |
2444 | struct rib *same = NULL; | |
fa713d9e CF |
2445 | struct nexthop *nexthop, *tnexthop; |
2446 | int recursing; | |
41ec9222 | 2447 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 2448 | |
05737783 CF |
2449 | assert(!src_p || afi == AFI_IP6); |
2450 | ||
718e3744 | 2451 | /* Lookup table. */ |
616368ed | 2452 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2453 | if (! table) |
265d5b9d | 2454 | return; |
718e3744 | 2455 | |
2456 | /* Apply mask. */ | |
616368ed | 2457 | apply_mask (p); |
05737783 CF |
2458 | if (src_p) |
2459 | apply_mask_ipv6 (src_p); | |
718e3744 | 2460 | |
2461 | /* Lookup route node. */ | |
05737783 | 2462 | rn = srcdest_rnode_lookup (table, p, src_p); |
718e3744 | 2463 | if (! rn) |
2464 | { | |
05737783 CF |
2465 | char dst_buf[PREFIX_STRLEN], src_buf[PREFIX_STRLEN]; |
2466 | ||
2467 | prefix2str(p, dst_buf, sizeof(dst_buf)); | |
2468 | if (src_p && src_p->prefixlen) | |
2469 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
2470 | else | |
2471 | src_buf[0] = '\0'; | |
2472 | ||
41ec9222 | 2473 | if (IS_ZEBRA_DEBUG_RIB) |
05737783 CF |
2474 | zlog_debug ("%u:%s%s%s doesn't exist in rib", |
2475 | vrf_id, dst_buf, | |
2476 | (src_buf[0] != '\0') ? " from " : "", | |
2477 | src_buf); | |
265d5b9d | 2478 | return; |
718e3744 | 2479 | } |
2480 | ||
2481 | /* Lookup same type route. */ | |
9fd92e3c | 2482 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2483 | { |
6d691129 PJ |
2484 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2485 | continue; | |
2486 | ||
446bb95e | 2487 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
718e3744 | 2488 | fib = rib; |
2489 | ||
ebf1ead0 | 2490 | if (rib->type != type) |
2491 | continue; | |
7c8ff89e DS |
2492 | if (rib->instance != instance) |
2493 | continue; | |
ebf1ead0 | 2494 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2495 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2496 | { |
4f1735fd MF |
2497 | if (nexthop->ifindex != ifindex) |
2498 | continue; | |
ebf1ead0 | 2499 | if (rib->refcnt) |
718e3744 | 2500 | { |
ebf1ead0 | 2501 | rib->refcnt--; |
2502 | route_unlock_node (rn); | |
2503 | route_unlock_node (rn); | |
265d5b9d | 2504 | return; |
718e3744 | 2505 | } |
ebf1ead0 | 2506 | same = rib; |
2507 | break; | |
718e3744 | 2508 | } |
ebf1ead0 | 2509 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2510 | else |
5ec90d28 | 2511 | { |
fa713d9e CF |
2512 | if (gate == NULL) |
2513 | { | |
2514 | same = rib; | |
2515 | break; | |
2516 | } | |
2517 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
616368ed DS |
2518 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || |
2519 | IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
fa713d9e CF |
2520 | { |
2521 | same = rib; | |
2522 | break; | |
2523 | } | |
2524 | if (same) | |
2525 | break; | |
2526 | } | |
718e3744 | 2527 | } |
718e3744 | 2528 | /* If same type of route can't be found and this message is from |
2529 | kernel. */ | |
2530 | if (! same) | |
2531 | { | |
2037f143 DS |
2532 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2533 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2534 | { | |
41ec9222 | 2535 | if (IS_ZEBRA_DEBUG_RIB) |
2037f143 | 2536 | { |
05737783 CF |
2537 | rnode_debug (rn, vrf_id, "rn %p, rib %p (type %d) was deleted from kernel, adding", |
2538 | rn, fib, fib->type); | |
2037f143 | 2539 | } |
6baf7bb8 DS |
2540 | if (allow_delete) |
2541 | { | |
2542 | /* Unset flags. */ | |
2543 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2544 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2545 | ||
446bb95e | 2546 | UNSET_FLAG (fib->status, RIB_ENTRY_SELECTED_FIB); |
6baf7bb8 DS |
2547 | } |
2548 | else | |
2549 | { | |
2550 | /* This means someone else, other than Zebra, has deleted | |
2551 | * a Zebra router from the kernel. We will add it back */ | |
949ae9ba | 2552 | rib_install_kernel(rn, fib, NULL); |
6baf7bb8 | 2553 | } |
2037f143 | 2554 | } |
718e3744 | 2555 | else |
2556 | { | |
41ec9222 | 2557 | if (IS_ZEBRA_DEBUG_RIB) |
718e3744 | 2558 | { |
2559 | if (gate) | |
05737783 | 2560 | rnode_debug(rn, vrf_id, "via %s ifindex %d type %d " |
78104b9b | 2561 | "doesn't exist in rib", |
05737783 | 2562 | inet_ntop (family2afi(afi), gate, buf2, INET_ADDRSTRLEN), /* FIXME */ |
35d921cc TT |
2563 | ifindex, |
2564 | type); | |
718e3744 | 2565 | else |
05737783 | 2566 | rnode_debug (rn, vrf_id, "ifindex %d type %d doesn't exist in rib", |
35d921cc TT |
2567 | ifindex, |
2568 | type); | |
718e3744 | 2569 | } |
2570 | route_unlock_node (rn); | |
265d5b9d | 2571 | return; |
718e3744 | 2572 | } |
2573 | } | |
4d38fdb4 | 2574 | |
718e3744 | 2575 | if (same) |
4d38fdb4 | 2576 | rib_delnode (rn, same); |
2577 | ||
718e3744 | 2578 | route_unlock_node (rn); |
265d5b9d | 2579 | return; |
718e3744 | 2580 | } |
6b0655a2 | 2581 | |
718e3744 | 2582 | |
718e3744 | 2583 | |
718e3744 | 2584 | int |
3b1098be DS |
2585 | rib_add (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2586 | u_short instance, int flags, struct prefix *p, | |
3c7c91d0 DL |
2587 | struct prefix_ipv6 *src_p, union g_addr *gate, |
2588 | union g_addr *src, ifindex_t ifindex, | |
3b1098be DS |
2589 | u_int32_t table_id, u_int32_t metric, u_int32_t mtu, |
2590 | u_char distance) | |
718e3744 | 2591 | { |
2592 | struct rib *rib; | |
2593 | struct rib *same = NULL; | |
2594 | struct route_table *table; | |
2595 | struct route_node *rn; | |
2596 | struct nexthop *nexthop; | |
2597 | ||
05737783 CF |
2598 | assert(!src_p || afi == AFI_IP6); |
2599 | ||
718e3744 | 2600 | /* Lookup table. */ |
3b1098be | 2601 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2602 | if (! table) |
2603 | return 0; | |
2604 | ||
2605 | /* Make sure mask is applied. */ | |
3b1098be | 2606 | apply_mask (p); |
05737783 CF |
2607 | if (src_p) |
2608 | apply_mask_ipv6 (src_p); | |
718e3744 | 2609 | |
2610 | /* Set default distance by route type. */ | |
3b1098be DS |
2611 | if (distance == 0) |
2612 | { | |
2613 | if ((unsigned)type >= array_size(route_info)) | |
2614 | distance = 150; | |
2615 | else | |
2616 | distance = route_info[type].distance; | |
2617 | ||
2618 | /* iBGP distance is 200. */ | |
2619 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2620 | distance = 200; | |
2621 | } | |
718e3744 | 2622 | |
718e3744 | 2623 | /* Lookup route node.*/ |
05737783 | 2624 | rn = srcdest_rnode_get (table, p, src_p); |
718e3744 | 2625 | |
2626 | /* If same type of route are installed, treat it as a implicit | |
2627 | withdraw. */ | |
9fd92e3c | 2628 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2629 | { |
6d691129 PJ |
2630 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2631 | continue; | |
2632 | ||
ebf1ead0 | 2633 | if (rib->type != type) |
2634 | continue; | |
7c8ff89e DS |
2635 | if (rib->instance != instance) |
2636 | continue; | |
ebf1ead0 | 2637 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 2638 | { |
2639 | same = rib; | |
718e3744 | 2640 | break; |
2641 | } | |
3b1098be | 2642 | /* Duplicate connected route comes in. */ |
ebf1ead0 | 2643 | else if ((nexthop = rib->nexthop) && |
2644 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3b1098be DS |
2645 | nexthop->ifindex == ifindex && |
2646 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2647 | { |
2648 | rib->refcnt++; | |
3b1098be | 2649 | return 0 ; |
ebf1ead0 | 2650 | } |
718e3744 | 2651 | } |
2652 | ||
2653 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2654 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2655 | ||
718e3744 | 2656 | rib->type = type; |
7c8ff89e | 2657 | rib->instance = instance; |
718e3744 | 2658 | rib->distance = distance; |
2659 | rib->flags = flags; | |
2660 | rib->metric = metric; | |
c50ca33a | 2661 | rib->mtu = mtu; |
7a4bb9c5 | 2662 | rib->table = table_id; |
78104b9b | 2663 | rib->vrf_id = vrf_id; |
718e3744 | 2664 | rib->nexthop_num = 0; |
2665 | rib->uptime = time (NULL); | |
2666 | ||
2667 | /* Nexthop settings. */ | |
2668 | if (gate) | |
2669 | { | |
3b1098be DS |
2670 | if (afi == AFI_IP6) |
2671 | { | |
2672 | if (ifindex) | |
2673 | rib_nexthop_ipv6_ifindex_add (rib, &gate->ipv6, ifindex); | |
2674 | else | |
2675 | rib_nexthop_ipv6_add (rib, &gate->ipv6); | |
2676 | } | |
718e3744 | 2677 | else |
3b1098be DS |
2678 | { |
2679 | if (ifindex) | |
2680 | rib_nexthop_ipv4_ifindex_add (rib, &gate->ipv4, &src->ipv4, ifindex); | |
2681 | else | |
2682 | rib_nexthop_ipv4_add (rib, &gate->ipv4, &src->ipv4); | |
2683 | } | |
718e3744 | 2684 | } |
2685 | else | |
a399694f | 2686 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 2687 | |
2688 | /* If this route is kernel route, set FIB flag to the route. */ | |
2689 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2690 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2691 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2692 | ||
2693 | /* Link new rib to node.*/ | |
fed643f4 | 2694 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 2695 | { |
05737783 CF |
2696 | rnode_debug (rn, vrf_id, "Inserting route rn %p, rib %p (type %d) existing %p", |
2697 | (void *)rn, (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2698 | |
2699 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
05737783 | 2700 | rib_dump (p, src_p, rib); |
41ec9222 | 2701 | } |
2bf26d41 | 2702 | rib_addnode (rn, rib, 1); |
718e3744 | 2703 | |
718e3744 | 2704 | /* Free implicit route.*/ |
2705 | if (same) | |
4d38fdb4 | 2706 | rib_delnode (rn, same); |
2707 | ||
2708 | route_unlock_node (rn); | |
718e3744 | 2709 | return 0; |
2710 | } | |
2711 | ||
1c848137 | 2712 | /* Schedule routes of a particular table (address-family) based on event. */ |
2713 | static void | |
2714 | rib_update_table (struct route_table *table, rib_update_event_t event) | |
b84c7253 | 2715 | { |
2716 | struct route_node *rn; | |
b84c7253 | 2717 | struct rib *rib, *next; |
2718 | ||
1c848137 | 2719 | /* Walk all routes and queue for processing, if appropriate for |
2720 | * the trigger event. | |
2721 | */ | |
05737783 | 2722 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
1c848137 | 2723 | { |
2724 | switch (event) | |
2725 | { | |
2726 | case RIB_UPDATE_IF_CHANGE: | |
2727 | /* Examine all routes that won't get processed by the protocol or | |
2728 | * triggered by nexthop evaluation (NHT). This would be system, | |
2729 | * kernel and certain static routes. Note that NHT will get | |
2730 | * triggered upon an interface event as connected routes always | |
2731 | * get queued for processing. | |
2732 | */ | |
2733 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
2734 | { | |
2735 | if (rib->type == ZEBRA_ROUTE_OSPF || | |
2736 | rib->type == ZEBRA_ROUTE_OSPF6 || | |
2737 | rib->type == ZEBRA_ROUTE_BGP) | |
2738 | continue; /* protocol will handle. */ | |
2739 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
2740 | { | |
2741 | struct nexthop *nh; | |
2742 | for (nh = rib->nexthop; nh; nh = nh->next) | |
2743 | if (!(nh->type == NEXTHOP_TYPE_IPV4 || | |
2744 | nh->type == NEXTHOP_TYPE_IPV6)) | |
2745 | break; | |
2746 | ||
2747 | /* If we only have nexthops to a gateway, NHT will | |
2748 | * take care. | |
2749 | */ | |
2750 | if (nh) | |
44e9909d | 2751 | rib_queue_add (rn); |
1c848137 | 2752 | } |
2753 | else | |
44e9909d | 2754 | rib_queue_add (rn); |
1c848137 | 2755 | } |
2756 | break; | |
b84c7253 | 2757 | |
1c848137 | 2758 | case RIB_UPDATE_RMAP_CHANGE: |
2759 | case RIB_UPDATE_OTHER: | |
2760 | /* Right now, examine all routes. Can restrict to a protocol in | |
2761 | * some cases (TODO). | |
2762 | */ | |
2763 | if (rnode_to_ribs (rn)) | |
44e9909d | 2764 | rib_queue_add (rn); |
1c848137 | 2765 | break; |
2766 | ||
2767 | default: | |
2768 | break; | |
2769 | } | |
2770 | } | |
b84c7253 | 2771 | } |
2772 | ||
718e3744 | 2773 | /* RIB update function. */ |
2774 | void | |
1c848137 | 2775 | rib_update (vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 2776 | { |
718e3744 | 2777 | struct route_table *table; |
1c848137 | 2778 | |
2779 | /* Process routes of interested address-families. */ | |
78104b9b | 2780 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 2781 | if (table) |
1c848137 | 2782 | rib_update_table (table, event); |
718e3744 | 2783 | |
78104b9b | 2784 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 2785 | if (table) |
1c848137 | 2786 | rib_update_table (table, event); |
718e3744 | 2787 | } |
2788 | ||
718e3744 | 2789 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 2790 | static void |
718e3744 | 2791 | rib_weed_table (struct route_table *table) |
2792 | { | |
2793 | struct route_node *rn; | |
2794 | struct rib *rib; | |
2795 | struct rib *next; | |
2796 | ||
2797 | if (table) | |
05737783 | 2798 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2799 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 2800 | { |
6d691129 PJ |
2801 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2802 | continue; | |
2803 | ||
b21b19c5 | 2804 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 2805 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 2806 | rib_delnode (rn, rib); |
718e3744 | 2807 | } |
2808 | } | |
2809 | ||
2810 | /* Delete all routes from non main table. */ | |
2811 | void | |
a1ac18c4 | 2812 | rib_weed_tables (void) |
718e3744 | 2813 | { |
1a1a7065 | 2814 | struct vrf *vrf; |
78104b9b FL |
2815 | struct zebra_vrf *zvrf; |
2816 | ||
1a1a7065 RW |
2817 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2818 | if ((zvrf = vrf->info) != NULL) | |
78104b9b FL |
2819 | { |
2820 | rib_weed_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
2821 | rib_weed_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2822 | } | |
718e3744 | 2823 | } |
6b0655a2 | 2824 | |
718e3744 | 2825 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 2826 | static void |
718e3744 | 2827 | rib_sweep_table (struct route_table *table) |
2828 | { | |
2829 | struct route_node *rn; | |
2830 | struct rib *rib; | |
2831 | struct rib *next; | |
2832 | int ret = 0; | |
2833 | ||
2834 | if (table) | |
05737783 | 2835 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2836 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 2837 | { |
6d691129 PJ |
2838 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2839 | continue; | |
2840 | ||
718e3744 | 2841 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
2842 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
2843 | { | |
2844 | ret = rib_uninstall_kernel (rn, rib); | |
2845 | if (! ret) | |
4d38fdb4 | 2846 | rib_delnode (rn, rib); |
718e3744 | 2847 | } |
2848 | } | |
2849 | } | |
2850 | ||
2851 | /* Sweep all RIB tables. */ | |
2852 | void | |
a1ac18c4 | 2853 | rib_sweep_route (void) |
718e3744 | 2854 | { |
1a1a7065 | 2855 | struct vrf *vrf; |
78104b9b FL |
2856 | struct zebra_vrf *zvrf; |
2857 | ||
1a1a7065 RW |
2858 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2859 | if ((zvrf = vrf->info) != NULL) | |
78104b9b FL |
2860 | { |
2861 | rib_sweep_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
2862 | rib_sweep_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2863 | } | |
718e3744 | 2864 | } |
2ea1ab1c VT |
2865 | |
2866 | /* Remove specific by protocol routes from 'table'. */ | |
2867 | static unsigned long | |
7c8ff89e | 2868 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
2869 | { |
2870 | struct route_node *rn; | |
2871 | struct rib *rib; | |
2872 | struct rib *next; | |
2873 | unsigned long n = 0; | |
2874 | ||
2875 | if (table) | |
05737783 | 2876 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2877 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 2878 | { |
2ea1ab1c VT |
2879 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2880 | continue; | |
7c8ff89e | 2881 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
2882 | { |
2883 | rib_delnode (rn, rib); | |
2884 | n++; | |
2885 | } | |
2886 | } | |
2ea1ab1c VT |
2887 | return n; |
2888 | } | |
2889 | ||
2890 | /* Remove specific by protocol routes. */ | |
2891 | unsigned long | |
7c8ff89e | 2892 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 2893 | { |
1a1a7065 | 2894 | struct vrf *vrf; |
78104b9b FL |
2895 | struct zebra_vrf *zvrf; |
2896 | unsigned long cnt = 0; | |
2897 | ||
1a1a7065 RW |
2898 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2899 | if ((zvrf = vrf->info) != NULL) | |
78104b9b FL |
2900 | cnt += rib_score_proto_table (proto, instance, zvrf->table[AFI_IP][SAFI_UNICAST]) |
2901 | +rib_score_proto_table (proto, instance, zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2902 | ||
2903 | return cnt; | |
2ea1ab1c VT |
2904 | } |
2905 | ||
718e3744 | 2906 | /* Close RIB and clean up kernel routes. */ |
a31c5886 | 2907 | void |
718e3744 | 2908 | rib_close_table (struct route_table *table) |
2909 | { | |
2910 | struct route_node *rn; | |
416ec78d | 2911 | rib_table_info_t *info = table->info; |
718e3744 | 2912 | struct rib *rib; |
2913 | ||
2914 | if (table) | |
05737783 | 2915 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2916 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 2917 | { |
446bb95e | 2918 | if (!CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
9fd92e3c AS |
2919 | continue; |
2920 | ||
416ec78d | 2921 | if (info->safi == SAFI_UNICAST) |
4f8ea50c | 2922 | hook_call(rib_update, rn, NULL); |
5adc2528 | 2923 | |
9fd92e3c AS |
2924 | if (! RIB_SYSTEM_ROUTE (rib)) |
2925 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 2926 | } |
718e3744 | 2927 | } |
2928 | ||
718e3744 | 2929 | /* Routing information base initialize. */ |
2930 | void | |
a1ac18c4 | 2931 | rib_init (void) |
718e3744 | 2932 | { |
4d38fdb4 | 2933 | rib_queue_init (&zebrad); |
718e3744 | 2934 | } |
0915bb0c AS |
2935 | |
2936 | /* | |
2937 | * vrf_id_get_next | |
2938 | * | |
2939 | * Get the first vrf id that is greater than the given vrf id if any. | |
2940 | * | |
2941 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
2942 | */ | |
2943 | static inline int | |
b72ede27 | 2944 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 2945 | { |
1a1a7065 | 2946 | struct vrf *vrf; |
b72ede27 | 2947 | |
5f3d1bdf | 2948 | vrf = vrf_lookup_by_id (vrf_id); |
1a1a7065 | 2949 | if (vrf) |
0915bb0c | 2950 | { |
1a1a7065 RW |
2951 | vrf = RB_NEXT (vrf_id_head, &vrfs_by_id, vrf); |
2952 | if (vrf) { | |
2953 | *next_id_p = vrf->vrf_id; | |
2954 | return 1; | |
2955 | } | |
0915bb0c AS |
2956 | } |
2957 | ||
2958 | return 0; | |
2959 | } | |
2960 | ||
2961 | /* | |
2962 | * rib_tables_iter_next | |
2963 | * | |
2964 | * Returns the next table in the iteration. | |
2965 | */ | |
2966 | struct route_table * | |
2967 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
2968 | { | |
2969 | struct route_table *table; | |
2970 | ||
2971 | /* | |
2972 | * Array that helps us go over all AFI/SAFI combinations via one | |
2973 | * index. | |
2974 | */ | |
2975 | static struct { | |
2976 | afi_t afi; | |
2977 | safi_t safi; | |
2978 | } afi_safis[] = { | |
2979 | { AFI_IP, SAFI_UNICAST }, | |
2980 | { AFI_IP, SAFI_MULTICAST }, | |
a64448ba | 2981 | { AFI_IP, SAFI_LABELED_UNICAST }, |
0915bb0c AS |
2982 | { AFI_IP6, SAFI_UNICAST }, |
2983 | { AFI_IP6, SAFI_MULTICAST }, | |
a64448ba | 2984 | { AFI_IP6, SAFI_LABELED_UNICAST }, |
0915bb0c AS |
2985 | }; |
2986 | ||
2987 | table = NULL; | |
2988 | ||
2989 | switch (iter->state) | |
2990 | { | |
2991 | ||
2992 | case RIB_TABLES_ITER_S_INIT: | |
9c2bf1cf | 2993 | iter->vrf_id = VRF_DEFAULT; |
0915bb0c AS |
2994 | iter->afi_safi_ix = -1; |
2995 | ||
2996 | /* Fall through */ | |
2997 | ||
2998 | case RIB_TABLES_ITER_S_ITERATING: | |
2999 | iter->afi_safi_ix++; | |
3000 | while (1) | |
3001 | { | |
3002 | ||
3003 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
3004 | { | |
b72ede27 | 3005 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
3006 | afi_safis[iter->afi_safi_ix].safi, |
3007 | iter->vrf_id); | |
3008 | if (table) | |
3009 | break; | |
3010 | ||
3011 | iter->afi_safi_ix++; | |
3012 | } | |
3013 | ||
3014 | /* | |
3015 | * Found another table in this vrf. | |
3016 | */ | |
3017 | if (table) | |
3018 | break; | |
3019 | ||
3020 | /* | |
3021 | * Done with all tables in the current vrf, go to the next | |
3022 | * one. | |
3023 | */ | |
3024 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
3025 | break; | |
3026 | ||
3027 | iter->afi_safi_ix = 0; | |
3028 | } | |
3029 | ||
3030 | break; | |
3031 | ||
3032 | case RIB_TABLES_ITER_S_DONE: | |
3033 | return NULL; | |
3034 | } | |
3035 | ||
3036 | if (table) | |
3037 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3038 | else | |
3039 | iter->state = RIB_TABLES_ITER_S_DONE; | |
3040 | ||
3041 | return table; | |
3042 | } | |
b72ede27 | 3043 |