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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 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
b892f1dd | 23 | #include "if.h" |
718e3744 | 24 | #include "prefix.h" |
25 | #include "table.h" | |
26 | #include "memory.h" | |
4a1ab8e4 | 27 | #include "zebra_memory.h" |
718e3744 | 28 | #include "command.h" |
718e3744 | 29 | #include "log.h" |
deaa50db | 30 | #include "log_int.h" |
718e3744 | 31 | #include "sockunion.h" |
4d38fdb4 | 32 | #include "linklist.h" |
33 | #include "thread.h" | |
34 | #include "workqueue.h" | |
7514fb77 PJ |
35 | #include "prefix.h" |
36 | #include "routemap.h" | |
fb018d25 | 37 | #include "nexthop.h" |
b72ede27 | 38 | #include "vrf.h" |
40c7bdb0 | 39 | #include "mpls.h" |
05737783 | 40 | #include "srcdest_table.h" |
718e3744 | 41 | |
42 | #include "zebra/rib.h" | |
43 | #include "zebra/rt.h" | |
7c551956 | 44 | #include "zebra/zebra_ns.h" |
718e3744 | 45 | #include "zebra/zserv.h" |
7c551956 | 46 | #include "zebra/zebra_vrf.h" |
718e3744 | 47 | #include "zebra/redistribute.h" |
8902474b | 48 | #include "zebra/zebra_routemap.h" |
718e3744 | 49 | #include "zebra/debug.h" |
fb018d25 | 50 | #include "zebra/zebra_rnh.h" |
88177fe3 | 51 | #include "zebra/interface.h" |
d44ca835 | 52 | #include "zebra/connected.h" |
718e3744 | 53 | |
4f8ea50c DL |
54 | DEFINE_HOOK(rib_update, (struct route_node *rn, const char *reason), (rn, reason)) |
55 | ||
6baf7bb8 DS |
56 | /* Should we allow non Quagga processes to delete our routes */ |
57 | extern int allow_delete; | |
58 | ||
457eb9af PJ |
59 | /* Hold time for RIB process, should be very minimal. |
60 | * it is useful to able to set it otherwise for testing, hence exported | |
61 | * as global here for test-rig code. | |
62 | */ | |
63 | int rib_process_hold_time = 10; | |
64 | ||
718e3744 | 65 | /* Each route type's string and default distance value. */ |
d145bc00 | 66 | static const struct |
718e3744 | 67 | { |
68 | int key; | |
69 | int distance; | |
5734509c | 70 | } route_info[ZEBRA_ROUTE_MAX] = |
718e3744 | 71 | { |
5734509c PJ |
72 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
73 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
74 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
75 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
76 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
77 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
78 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
79 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
80 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
81 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
2fb975da | 82 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10}, |
7052f228 | 83 | /* no entry/default: 150 */ |
718e3744 | 84 | }; |
6b0655a2 | 85 | |
4623d897 DL |
86 | /* RPF lookup behaviour */ |
87 | static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; | |
88 | ||
6c4f4e6e DL |
89 | |
90 | static void __attribute__((format (printf, 5, 6))) | |
2263a412 DL |
91 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, int priority, |
92 | const char *msgfmt, ...) | |
93 | { | |
05737783 | 94 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
2263a412 DL |
95 | char msgbuf[512]; |
96 | va_list ap; | |
97 | ||
98 | va_start(ap, msgfmt); | |
99 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
100 | va_end(ap); | |
101 | ||
102 | if (rn) | |
103 | { | |
05737783 CF |
104 | rib_table_info_t *info = srcdest_rnode_table_info (rn); |
105 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
cb653491 | 106 | |
35d921cc TT |
107 | if (info->safi == SAFI_MULTICAST) |
108 | strcat(buf, " (MRIB)"); | |
2263a412 DL |
109 | } |
110 | else | |
111 | { | |
112 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
113 | } | |
114 | ||
bb85d700 | 115 | zlog (priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); |
2263a412 DL |
116 | } |
117 | ||
118 | #define rnode_debug(node, vrf_id, ...) \ | |
119 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) | |
120 | #define rnode_info(node, ...) \ | |
121 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) | |
122 | ||
40c7bdb0 | 123 | u_char |
124 | route_distance (int type) | |
125 | { | |
126 | u_char distance; | |
127 | ||
128 | if ((unsigned)type >= array_size(route_info)) | |
129 | distance = 150; | |
130 | else | |
131 | distance = route_info[type].distance; | |
132 | ||
133 | return distance; | |
134 | } | |
135 | ||
7a4bb9c5 DS |
136 | int |
137 | is_zebra_valid_kernel_table(u_int32_t table_id) | |
138 | { | |
8f500a1c RW |
139 | if ((table_id > ZEBRA_KERNEL_TABLE_MAX)) |
140 | return 0; | |
141 | ||
142 | #ifdef linux | |
143 | if ((table_id == RT_TABLE_UNSPEC) || | |
7a4bb9c5 DS |
144 | (table_id == RT_TABLE_LOCAL) || |
145 | (table_id == RT_TABLE_COMPAT)) | |
146 | return 0; | |
8f500a1c RW |
147 | #endif |
148 | ||
149 | return 1; | |
7a4bb9c5 DS |
150 | } |
151 | ||
152 | int | |
153 | is_zebra_main_routing_table(u_int32_t table_id) | |
154 | { | |
155 | if ((table_id == RT_TABLE_MAIN) || (table_id == zebrad.rtm_table_default)) | |
156 | return 1; | |
157 | return 0; | |
158 | } | |
159 | ||
0aabccc0 DD |
160 | int |
161 | zebra_check_addr (struct prefix *p) | |
162 | { | |
163 | if (p->family == AF_INET) | |
164 | { | |
165 | u_int32_t addr; | |
166 | ||
167 | addr = p->u.prefix4.s_addr; | |
168 | addr = ntohl (addr); | |
169 | ||
170 | if (IPV4_NET127 (addr) | |
171 | || IN_CLASSD (addr) | |
172 | || IPV4_LINKLOCAL(addr)) | |
173 | return 0; | |
174 | } | |
0aabccc0 DD |
175 | if (p->family == AF_INET6) |
176 | { | |
177 | if (IN6_IS_ADDR_LOOPBACK (&p->u.prefix6)) | |
178 | return 0; | |
179 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
180 | return 0; | |
181 | } | |
0aabccc0 DD |
182 | return 1; |
183 | } | |
184 | ||
fa713d9e | 185 | /* Add nexthop to the end of a rib node's nexthop list */ |
fb018d25 | 186 | void |
a399694f | 187 | rib_nexthop_add (struct rib *rib, struct nexthop *nexthop) |
fa713d9e | 188 | { |
a399694f | 189 | nexthop_add(&rib->nexthop, nexthop); |
718e3744 | 190 | rib->nexthop_num++; |
191 | } | |
192 | ||
6e26278c | 193 | |
6e26278c DS |
194 | |
195 | /** | |
196 | * copy_nexthop - copy a nexthop to the rib structure. | |
197 | */ | |
198 | void | |
a399694f | 199 | rib_copy_nexthops (struct rib *rib, struct nexthop *nh) |
6e26278c DS |
200 | { |
201 | struct nexthop *nexthop; | |
202 | ||
203 | nexthop = nexthop_new(); | |
204 | nexthop->flags = nh->flags; | |
205 | nexthop->type = nh->type; | |
206 | nexthop->ifindex = nh->ifindex; | |
6e26278c DS |
207 | memcpy(&(nexthop->gate), &(nh->gate), sizeof(union g_addr)); |
208 | memcpy(&(nexthop->src), &(nh->src), sizeof(union g_addr)); | |
c0f4be83 | 209 | if (nh->nh_label) |
ce549947 | 210 | nexthop_add_labels (nexthop, nh->nh_label_type, nh->nh_label->num_labels, |
c0f4be83 | 211 | &nh->nh_label->label[0]); |
a399694f | 212 | rib_nexthop_add(rib, nexthop); |
6e26278c | 213 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) |
a399694f | 214 | copy_nexthops(&nexthop->resolved, nh->resolved); |
6e26278c DS |
215 | } |
216 | ||
718e3744 | 217 | /* Delete specified nexthop from the list. */ |
28f6dde8 | 218 | void |
a399694f | 219 | rib_nexthop_delete (struct rib *rib, struct nexthop *nexthop) |
718e3744 | 220 | { |
221 | if (nexthop->next) | |
222 | nexthop->next->prev = nexthop->prev; | |
223 | if (nexthop->prev) | |
224 | nexthop->prev->next = nexthop->next; | |
225 | else | |
226 | rib->nexthop = nexthop->next; | |
227 | rib->nexthop_num--; | |
228 | } | |
229 | ||
fa713d9e | 230 | |
fa713d9e | 231 | |
718e3744 | 232 | struct nexthop * |
b892f1dd | 233 | rib_nexthop_ifindex_add (struct rib *rib, ifindex_t ifindex) |
718e3744 | 234 | { |
235 | struct nexthop *nexthop; | |
236 | ||
a399694f | 237 | nexthop = nexthop_new(); |
718e3744 | 238 | nexthop->type = NEXTHOP_TYPE_IFINDEX; |
239 | nexthop->ifindex = ifindex; | |
240 | ||
a399694f | 241 | rib_nexthop_add (rib, nexthop); |
718e3744 | 242 | |
243 | return nexthop; | |
244 | } | |
245 | ||
718e3744 | 246 | struct nexthop * |
a399694f | 247 | rib_nexthop_ipv4_add (struct rib *rib, struct in_addr *ipv4, struct in_addr *src) |
718e3744 | 248 | { |
249 | struct nexthop *nexthop; | |
250 | ||
a399694f | 251 | nexthop = nexthop_new(); |
718e3744 | 252 | nexthop->type = NEXTHOP_TYPE_IPV4; |
253 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
254 | if (src) |
255 | nexthop->src.ipv4 = *src; | |
718e3744 | 256 | |
a399694f | 257 | rib_nexthop_add (rib, nexthop); |
718e3744 | 258 | |
259 | return nexthop; | |
260 | } | |
261 | ||
26e2ae36 | 262 | struct nexthop * |
a399694f | 263 | rib_nexthop_ipv4_ifindex_add (struct rib *rib, struct in_addr *ipv4, |
b892f1dd | 264 | struct in_addr *src, ifindex_t ifindex) |
718e3744 | 265 | { |
266 | struct nexthop *nexthop; | |
d44ca835 | 267 | struct interface *ifp; |
718e3744 | 268 | |
a399694f | 269 | nexthop = nexthop_new(); |
718e3744 | 270 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
271 | nexthop->gate.ipv4 = *ipv4; | |
7514fb77 PJ |
272 | if (src) |
273 | nexthop->src.ipv4 = *src; | |
718e3744 | 274 | nexthop->ifindex = ifindex; |
7e2b7603 | 275 | ifp = if_lookup_by_index (nexthop->ifindex, VRF_DEFAULT); |
12f6fb97 DS |
276 | /*Pending: need to think if null ifp here is ok during bootup? |
277 | There was a crash because ifp here was coming to be NULL */ | |
278 | if (ifp) | |
d44ca835 DS |
279 | if (connected_is_unnumbered(ifp)) { |
280 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
281 | } | |
718e3744 | 282 | |
a399694f | 283 | rib_nexthop_add (rib, nexthop); |
718e3744 | 284 | |
285 | return nexthop; | |
286 | } | |
287 | ||
718e3744 | 288 | struct nexthop * |
a399694f | 289 | rib_nexthop_ipv6_add (struct rib *rib, struct in6_addr *ipv6) |
718e3744 | 290 | { |
291 | struct nexthop *nexthop; | |
292 | ||
a399694f | 293 | nexthop = nexthop_new(); |
718e3744 | 294 | nexthop->type = NEXTHOP_TYPE_IPV6; |
295 | nexthop->gate.ipv6 = *ipv6; | |
296 | ||
a399694f | 297 | rib_nexthop_add (rib, nexthop); |
718e3744 | 298 | |
299 | return nexthop; | |
300 | } | |
301 | ||
41fc2714 | 302 | struct nexthop * |
a399694f | 303 | rib_nexthop_ipv6_ifindex_add (struct rib *rib, struct in6_addr *ipv6, |
b892f1dd | 304 | ifindex_t ifindex) |
718e3744 | 305 | { |
306 | struct nexthop *nexthop; | |
307 | ||
4a1ab8e4 | 308 | nexthop = nexthop_new(); |
718e3744 | 309 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
310 | nexthop->gate.ipv6 = *ipv6; | |
311 | nexthop->ifindex = ifindex; | |
312 | ||
a399694f | 313 | rib_nexthop_add (rib, nexthop); |
718e3744 | 314 | |
315 | return nexthop; | |
316 | } | |
718e3744 | 317 | |
595db7f1 | 318 | struct nexthop * |
a399694f | 319 | rib_nexthop_blackhole_add (struct rib *rib) |
595db7f1 | 320 | { |
321 | struct nexthop *nexthop; | |
322 | ||
a399694f | 323 | nexthop = nexthop_new(); |
595db7f1 | 324 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
325 | SET_FLAG (rib->flags, ZEBRA_FLAG_BLACKHOLE); | |
326 | ||
a399694f | 327 | rib_nexthop_add (rib, nexthop); |
595db7f1 | 328 | |
329 | return nexthop; | |
330 | } | |
331 | ||
fa713d9e CF |
332 | /* This method checks whether a recursive nexthop has at |
333 | * least one resolved nexthop in the fib. | |
334 | */ | |
335 | int | |
336 | nexthop_has_fib_child(struct nexthop *nexthop) | |
337 | { | |
338 | struct nexthop *nh; | |
339 | ||
340 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
341 | return 0; | |
342 | ||
343 | for (nh = nexthop->resolved; nh; nh = nh->next) | |
344 | if (CHECK_FLAG (nh->flags, NEXTHOP_FLAG_FIB)) | |
345 | return 1; | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
718e3744 | 350 | /* If force flag is not set, do not modify falgs at all for uninstall |
351 | the route from FIB. */ | |
a1ac18c4 | 352 | static int |
b153b010 DS |
353 | nexthop_active (afi_t afi, struct rib *rib, struct nexthop *nexthop, int set, |
354 | struct route_node *top) | |
718e3744 | 355 | { |
b153b010 | 356 | struct prefix p; |
718e3744 | 357 | struct route_table *table; |
358 | struct route_node *rn; | |
359 | struct rib *match; | |
fa713d9e | 360 | int resolved; |
6e26278c | 361 | struct nexthop *newhop, *tnewhop; |
fa713d9e | 362 | struct nexthop *resolved_hop; |
6e26278c | 363 | int recursing = 0; |
c8a1cb5c | 364 | struct interface *ifp; |
718e3744 | 365 | |
b153b010 | 366 | if ((nexthop->type == NEXTHOP_TYPE_IPV4) || nexthop->type == NEXTHOP_TYPE_IPV6) |
718e3744 | 367 | nexthop->ifindex = 0; |
368 | ||
369 | if (set) | |
fa713d9e CF |
370 | { |
371 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d82ae0de | 372 | zebra_deregister_rnh_static_nexthops(rib->vrf_id, nexthop->resolved, top); |
a399694f | 373 | nexthops_free(nexthop->resolved); |
fa713d9e | 374 | nexthop->resolved = NULL; |
c50ca33a | 375 | rib->nexthop_mtu = 0; |
fa713d9e | 376 | } |
718e3744 | 377 | |
6e26278c DS |
378 | /* Skip nexthops that have been filtered out due to route-map */ |
379 | /* The nexthops are specific to this route and so the same */ | |
380 | /* nexthop for a different route may not have this flag set */ | |
381 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
382 | return 0; | |
383 | ||
d44ca835 DS |
384 | /* |
385 | * Check to see if we should trust the passed in information | |
386 | * for UNNUMBERED interfaces as that we won't find the GW | |
387 | * address in the routing table. | |
c8a1cb5c DS |
388 | */ |
389 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
390 | { | |
7e2b7603 | 391 | ifp = if_lookup_by_index (nexthop->ifindex, VRF_DEFAULT); |
d44ca835 DS |
392 | if (ifp && connected_is_unnumbered(ifp)) |
393 | { | |
394 | if (if_is_operative(ifp)) | |
395 | return 1; | |
396 | else | |
397 | return 0; | |
398 | } | |
c8a1cb5c DS |
399 | else |
400 | return 0; | |
401 | } | |
402 | ||
718e3744 | 403 | /* Make lookup prefix. */ |
b153b010 DS |
404 | memset (&p, 0, sizeof (struct prefix)); |
405 | switch (afi) | |
406 | { | |
407 | case AFI_IP: | |
408 | p.family = AF_INET; | |
409 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
410 | p.u.prefix4 = nexthop->gate.ipv4; | |
411 | break; | |
412 | case AFI_IP6: | |
413 | p.family = AF_INET6; | |
414 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
415 | p.u.prefix6 = nexthop->gate.ipv6; | |
416 | break; | |
417 | default: | |
418 | assert (afi != AFI_IP && afi != AFI_IP6); | |
419 | break; | |
420 | } | |
718e3744 | 421 | /* Lookup table. */ |
b153b010 | 422 | table = zebra_vrf_table (afi, SAFI_UNICAST, rib->vrf_id); |
718e3744 | 423 | if (! table) |
424 | return 0; | |
425 | ||
426 | rn = route_node_match (table, (struct prefix *) &p); | |
427 | while (rn) | |
428 | { | |
429 | route_unlock_node (rn); | |
430 | ||
a50c107e | 431 | /* If lookup self prefix return immediately. */ |
718e3744 | 432 | if (rn == top) |
433 | return 0; | |
434 | ||
435 | /* Pick up selected route. */ | |
18ff3edd DS |
436 | /* However, do not resolve over default route unless explicitly allowed. */ |
437 | if (is_default_prefix (&rn->p) && | |
438 | !nh_resolve_via_default (p.family)) | |
439 | return 0; | |
440 | ||
9fd92e3c | 441 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
442 | { |
443 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
444 | continue; | |
633e504d DS |
445 | |
446 | /* if the next hop is imported from another table, skip it */ | |
447 | if (match->type == ZEBRA_ROUTE_TABLE) | |
448 | continue; | |
446bb95e | 449 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
450 | break; |
451 | } | |
718e3744 | 452 | |
453 | /* If there is no selected route or matched route is EGP, go up | |
454 | tree. */ | |
6e26278c | 455 | if (! match) |
718e3744 | 456 | { |
457 | do { | |
458 | rn = rn->parent; | |
459 | } while (rn && rn->info == NULL); | |
460 | if (rn) | |
461 | route_lock_node (rn); | |
462 | } | |
463 | else | |
464 | { | |
48a53dc7 CF |
465 | /* If the longest prefix match for the nexthop yields |
466 | * a blackhole, mark it as inactive. */ | |
467 | if (CHECK_FLAG (match->flags, ZEBRA_FLAG_BLACKHOLE) | |
468 | || CHECK_FLAG (match->flags, ZEBRA_FLAG_REJECT)) | |
469 | return 0; | |
470 | ||
718e3744 | 471 | if (match->type == ZEBRA_ROUTE_CONNECT) |
472 | { | |
473 | /* Directly point connected route. */ | |
474 | newhop = match->nexthop; | |
b153b010 DS |
475 | if (newhop) |
476 | { | |
6bcc7f4b DS |
477 | if (nexthop->type == NEXTHOP_TYPE_IPV4 || |
478 | nexthop->type == NEXTHOP_TYPE_IPV6) | |
479 | nexthop->ifindex = newhop->ifindex; | |
b153b010 | 480 | } |
718e3744 | 481 | return 1; |
482 | } | |
22afbf94 | 483 | else if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_INTERNAL)) |
718e3744 | 484 | { |
fa713d9e | 485 | resolved = 0; |
718e3744 | 486 | for (newhop = match->nexthop; newhop; newhop = newhop->next) |
487 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB) | |
488 | && ! CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
489 | { | |
490 | if (set) | |
491 | { | |
492 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
6e26278c | 493 | SET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
fa713d9e | 494 | |
4a1ab8e4 | 495 | resolved_hop = nexthop_new(); |
fa713d9e | 496 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
c3e6b595 CF |
497 | /* If the resolving route specifies a gateway, use it */ |
498 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 499 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
c3e6b595 CF |
500 | { |
501 | resolved_hop->type = newhop->type; | |
502 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
877a0aba DS |
503 | |
504 | if (newhop->ifindex) | |
505 | { | |
506 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
507 | resolved_hop->ifindex = newhop->ifindex; | |
508 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) | |
509 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
510 | } | |
c3e6b595 | 511 | } |
b153b010 DS |
512 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
513 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
514 | { | |
515 | resolved_hop->type = newhop->type; | |
516 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
517 | ||
518 | if (newhop->ifindex) | |
519 | { | |
520 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
521 | resolved_hop->ifindex = newhop->ifindex; | |
522 | } | |
523 | } | |
c3e6b595 | 524 | |
877a0aba DS |
525 | /* If the resolving route is an interface route, |
526 | * it means the gateway we are looking up is connected | |
527 | * to that interface. (The actual network is _not_ onlink). | |
528 | * Therefore, the resolved route should have the original | |
529 | * gateway as nexthop as it is directly connected. | |
530 | * | |
531 | * On Linux, we have to set the onlink netlink flag because | |
532 | * otherwise, the kernel won't accept the route. */ | |
3ee39b5b | 533 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
c3e6b595 | 534 | { |
877a0aba | 535 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
b153b010 DS |
536 | if (afi == AFI_IP) |
537 | { | |
538 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
539 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
540 | } | |
541 | else if (afi == AFI_IP6) | |
542 | { | |
543 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
544 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
545 | } | |
c3e6b595 CF |
546 | resolved_hop->ifindex = newhop->ifindex; |
547 | } | |
fa713d9e | 548 | |
a399694f | 549 | nexthop_add(&nexthop->resolved, resolved_hop); |
6e26278c DS |
550 | } |
551 | resolved = 1; | |
552 | } | |
553 | return resolved; | |
554 | } | |
555 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
556 | { | |
557 | resolved = 0; | |
558 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) | |
559 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) | |
560 | { | |
561 | if (set) | |
562 | { | |
563 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
564 | ||
4a1ab8e4 | 565 | resolved_hop = nexthop_new(); |
6e26278c DS |
566 | SET_FLAG (resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); |
567 | /* If the resolving route specifies a gateway, use it */ | |
568 | if (newhop->type == NEXTHOP_TYPE_IPV4 | |
3ee39b5b | 569 | || newhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) |
6e26278c DS |
570 | { |
571 | resolved_hop->type = newhop->type; | |
572 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
573 | ||
574 | if (newhop->ifindex) | |
575 | { | |
576 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
577 | resolved_hop->ifindex = newhop->ifindex; | |
f44f6668 DS |
578 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
579 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
6e26278c DS |
580 | } |
581 | } | |
6e26278c | 582 | if (newhop->type == NEXTHOP_TYPE_IPV6 |
3ee39b5b | 583 | || newhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) |
6e26278c DS |
584 | { |
585 | resolved_hop->type = newhop->type; | |
586 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
587 | ||
588 | if (newhop->ifindex) | |
589 | { | |
590 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
591 | resolved_hop->ifindex = newhop->ifindex; | |
592 | } | |
593 | } | |
594 | ||
b153b010 DS |
595 | /* If the resolving route is an interface route, |
596 | * it means the gateway we are looking up is connected | |
597 | * to that interface. (The actual network is _not_ onlink). | |
598 | * Therefore, the resolved route should have the original | |
599 | * gateway as nexthop as it is directly connected. | |
600 | * | |
601 | * On Linux, we have to set the onlink netlink flag because | |
602 | * otherwise, the kernel won't accept the route. | |
603 | */ | |
3ee39b5b | 604 | if (newhop->type == NEXTHOP_TYPE_IFINDEX) |
6e26278c | 605 | { |
b153b010 DS |
606 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
607 | if (afi == AFI_IP) | |
c3e6b595 | 608 | { |
b153b010 DS |
609 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
610 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
c3e6b595 | 611 | } |
b153b010 DS |
612 | else if (afi == AFI_IP6) |
613 | { | |
c3e6b595 CF |
614 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
615 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
b153b010 DS |
616 | } |
617 | resolved_hop->ifindex = newhop->ifindex; | |
c3e6b595 | 618 | } |
fa713d9e | 619 | |
a399694f | 620 | nexthop_add(&nexthop->resolved, resolved_hop); |
718e3744 | 621 | } |
fa713d9e | 622 | resolved = 1; |
718e3744 | 623 | } |
b153b010 DS |
624 | if (resolved && set) |
625 | rib->nexthop_mtu = match->mtu; | |
fa713d9e | 626 | return resolved; |
718e3744 | 627 | } |
628 | else | |
629 | { | |
630 | return 0; | |
631 | } | |
632 | } | |
633 | } | |
634 | return 0; | |
635 | } | |
718e3744 | 636 | |
637 | struct rib * | |
14364a31 DS |
638 | rib_match (afi_t afi, safi_t safi, vrf_id_t vrf_id, |
639 | union g_addr *addr, struct route_node **rn_out) | |
718e3744 | 640 | { |
14364a31 | 641 | struct prefix p; |
718e3744 | 642 | struct route_table *table; |
643 | struct route_node *rn; | |
644 | struct rib *match; | |
fa713d9e CF |
645 | struct nexthop *newhop, *tnewhop; |
646 | int recursing; | |
718e3744 | 647 | |
648 | /* Lookup table. */ | |
14364a31 | 649 | table = zebra_vrf_table (afi, safi, vrf_id); |
718e3744 | 650 | if (! table) |
651 | return 0; | |
652 | ||
14364a31 DS |
653 | memset (&p, 0, sizeof (struct prefix)); |
654 | p.family = afi; | |
14364a31 | 655 | if (afi == AFI_IP) |
d71f1c4e DS |
656 | { |
657 | p.u.prefix4 = addr->ipv4; | |
658 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
659 | } | |
14364a31 | 660 | else |
d71f1c4e DS |
661 | { |
662 | p.u.prefix6 = addr->ipv6; | |
663 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
664 | } | |
718e3744 | 665 | |
666 | rn = route_node_match (table, (struct prefix *) &p); | |
667 | ||
668 | while (rn) | |
669 | { | |
670 | route_unlock_node (rn); | |
671 | ||
672 | /* Pick up selected route. */ | |
9fd92e3c | 673 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
674 | { |
675 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
676 | continue; | |
446bb95e | 677 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
678 | break; |
679 | } | |
718e3744 | 680 | |
681 | /* If there is no selected route or matched route is EGP, go up | |
682 | tree. */ | |
6e26278c | 683 | if (! match) |
718e3744 | 684 | { |
685 | do { | |
686 | rn = rn->parent; | |
687 | } while (rn && rn->info == NULL); | |
688 | if (rn) | |
689 | route_lock_node (rn); | |
690 | } | |
691 | else | |
692 | { | |
33550aa8 | 693 | if (match->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 694 | { |
33550aa8 | 695 | int found = 0; |
fa713d9e | 696 | for (ALL_NEXTHOPS_RO(match->nexthop, newhop, tnewhop, recursing)) |
718e3744 | 697 | if (CHECK_FLAG (newhop->flags, NEXTHOP_FLAG_FIB)) |
33550aa8 DL |
698 | { |
699 | found = 1; | |
700 | break; | |
701 | } | |
702 | if (!found) | |
703 | return NULL; | |
718e3744 | 704 | } |
33550aa8 DL |
705 | |
706 | if (rn_out) | |
707 | *rn_out = rn; | |
708 | return match; | |
718e3744 | 709 | } |
710 | } | |
711 | return NULL; | |
712 | } | |
713 | ||
4623d897 | 714 | struct rib * |
f86a2b82 | 715 | rib_match_ipv4_multicast (vrf_id_t vrf_id, struct in_addr addr, struct route_node **rn_out) |
4623d897 DL |
716 | { |
717 | struct rib *rib = NULL, *mrib = NULL, *urib = NULL; | |
718 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
14364a31 | 719 | union g_addr gaddr = { .ipv4 = addr }; |
4623d897 DL |
720 | |
721 | switch (ipv4_multicast_mode) | |
722 | { | |
723 | case MCAST_MRIB_ONLY: | |
f86a2b82 | 724 | return rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, rn_out); |
4623d897 | 725 | case MCAST_URIB_ONLY: |
f86a2b82 | 726 | return rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); |
4623d897 DL |
727 | case MCAST_NO_CONFIG: |
728 | case MCAST_MIX_MRIB_FIRST: | |
f86a2b82 | 729 | rib = mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
4623d897 | 730 | if (!mrib) |
f86a2b82 | 731 | rib = urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); |
4623d897 DL |
732 | break; |
733 | case MCAST_MIX_DISTANCE: | |
f86a2b82 DS |
734 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
735 | urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
4623d897 DL |
736 | if (mrib && urib) |
737 | rib = urib->distance < mrib->distance ? urib : mrib; | |
738 | else if (mrib) | |
739 | rib = mrib; | |
740 | else if (urib) | |
741 | rib = urib; | |
742 | break; | |
743 | case MCAST_MIX_PFXLEN: | |
f86a2b82 DS |
744 | mrib = rib_match (AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); |
745 | urib = rib_match (AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
4623d897 DL |
746 | if (mrib && urib) |
747 | rib = u_rn->p.prefixlen > m_rn->p.prefixlen ? urib : mrib; | |
748 | else if (mrib) | |
749 | rib = mrib; | |
750 | else if (urib) | |
751 | rib = urib; | |
752 | break; | |
753 | } | |
754 | ||
755 | if (rn_out) | |
756 | *rn_out = (rib == mrib) ? m_rn : u_rn; | |
757 | ||
758 | if (IS_ZEBRA_DEBUG_RIB) | |
759 | { | |
760 | char buf[BUFSIZ]; | |
761 | inet_ntop (AF_INET, &addr, buf, BUFSIZ); | |
762 | ||
763 | zlog_debug("%s: %s: found %s, using %s", | |
764 | __func__, buf, | |
765 | mrib ? (urib ? "MRIB+URIB" : "MRIB") : | |
766 | urib ? "URIB" : "nothing", | |
767 | rib == urib ? "URIB" : rib == mrib ? "MRIB" : "none"); | |
768 | } | |
769 | return rib; | |
770 | } | |
771 | ||
772 | void | |
773 | multicast_mode_ipv4_set (enum multicast_mode mode) | |
774 | { | |
775 | if (IS_ZEBRA_DEBUG_RIB) | |
776 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, mode); | |
777 | ipv4_multicast_mode = mode; | |
778 | } | |
779 | ||
780 | enum multicast_mode | |
781 | multicast_mode_ipv4_get (void) | |
782 | { | |
783 | return ipv4_multicast_mode; | |
784 | } | |
785 | ||
718e3744 | 786 | struct rib * |
78104b9b | 787 | rib_lookup_ipv4 (struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 788 | { |
789 | struct route_table *table; | |
790 | struct route_node *rn; | |
791 | struct rib *match; | |
fa713d9e CF |
792 | struct nexthop *nexthop, *tnexthop; |
793 | int recursing; | |
718e3744 | 794 | |
795 | /* Lookup table. */ | |
78104b9b | 796 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 797 | if (! table) |
798 | return 0; | |
799 | ||
800 | rn = route_node_lookup (table, (struct prefix *) p); | |
801 | ||
802 | /* No route for this prefix. */ | |
803 | if (! rn) | |
804 | return NULL; | |
805 | ||
806 | /* Unlock node. */ | |
807 | route_unlock_node (rn); | |
808 | ||
9fd92e3c | 809 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
810 | { |
811 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
812 | continue; | |
446bb95e | 813 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
814 | break; |
815 | } | |
718e3744 | 816 | |
6e26278c | 817 | if (! match) |
718e3744 | 818 | return NULL; |
819 | ||
820 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
821 | return match; | |
822 | ||
fa713d9e | 823 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 824 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
825 | return match; | |
826 | ||
827 | return NULL; | |
828 | } | |
829 | ||
dc95824a DO |
830 | /* |
831 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
832 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
446bb95e | 833 | * the whole RIB and has RIB_ENTRY_SELECTED_FIB set. |
dc95824a DO |
834 | * |
835 | * Return values: | |
836 | * -1: error | |
837 | * 0: exact match found | |
838 | * 1: a match was found with a different gate | |
839 | * 2: connected route found | |
840 | * 3: no matches found | |
841 | */ | |
842 | int | |
78104b9b FL |
843 | rib_lookup_ipv4_route (struct prefix_ipv4 *p, union sockunion * qgate, |
844 | vrf_id_t vrf_id) | |
dc95824a DO |
845 | { |
846 | struct route_table *table; | |
847 | struct route_node *rn; | |
848 | struct rib *match; | |
fa713d9e CF |
849 | struct nexthop *nexthop, *tnexthop; |
850 | int recursing; | |
851 | int nexthops_active; | |
dc95824a DO |
852 | |
853 | /* Lookup table. */ | |
78104b9b | 854 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
855 | if (! table) |
856 | return ZEBRA_RIB_LOOKUP_ERROR; | |
857 | ||
858 | /* Scan the RIB table for exactly matching RIB entry. */ | |
859 | rn = route_node_lookup (table, (struct prefix *) p); | |
860 | ||
861 | /* No route for this prefix. */ | |
862 | if (! rn) | |
863 | return ZEBRA_RIB_NOTFOUND; | |
864 | ||
865 | /* Unlock node. */ | |
866 | route_unlock_node (rn); | |
867 | ||
868 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. */ | |
9fd92e3c | 869 | RNODE_FOREACH_RIB (rn, match) |
16814f96 SH |
870 | { |
871 | if (CHECK_FLAG (match->status, RIB_ENTRY_REMOVED)) | |
872 | continue; | |
446bb95e | 873 | if (CHECK_FLAG (match->status, RIB_ENTRY_SELECTED_FIB)) |
16814f96 SH |
874 | break; |
875 | } | |
dc95824a DO |
876 | |
877 | /* None such found :( */ | |
878 | if (!match) | |
879 | return ZEBRA_RIB_NOTFOUND; | |
880 | ||
881 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
882 | return ZEBRA_RIB_FOUND_CONNECTED; | |
883 | ||
884 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
fa713d9e CF |
885 | nexthops_active = 0; |
886 | for (ALL_NEXTHOPS_RO(match->nexthop, nexthop, tnexthop, recursing)) | |
dc95824a | 887 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
dc95824a | 888 | { |
fa713d9e CF |
889 | nexthops_active = 1; |
890 | if (nexthop->gate.ipv4.s_addr == sockunion2ip (qgate)) | |
891 | return ZEBRA_RIB_FOUND_EXACT; | |
dc95824a | 892 | if (IS_ZEBRA_DEBUG_RIB) |
fa713d9e CF |
893 | { |
894 | char gate_buf[INET_ADDRSTRLEN], qgate_buf[INET_ADDRSTRLEN]; | |
895 | inet_ntop (AF_INET, &nexthop->gate.ipv4.s_addr, gate_buf, INET_ADDRSTRLEN); | |
896 | inet_ntop (AF_INET, &sockunion2ip(qgate), qgate_buf, INET_ADDRSTRLEN); | |
897 | zlog_debug ("%s: qgate == %s, %s == %s", __func__, | |
898 | qgate_buf, recursing ? "rgate" : "gate", gate_buf); | |
899 | } | |
dc95824a | 900 | } |
fa713d9e CF |
901 | |
902 | if (nexthops_active) | |
903 | return ZEBRA_RIB_FOUND_NOGATE; | |
dc95824a DO |
904 | |
905 | return ZEBRA_RIB_NOTFOUND; | |
906 | } | |
907 | ||
7514fb77 PJ |
908 | #define RIB_SYSTEM_ROUTE(R) \ |
909 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
910 | ||
dc95824a DO |
911 | /* This function verifies reachability of one given nexthop, which can be |
912 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
913 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
914 | * nexthop->ifindex will be updated appropriately as well. | |
915 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
916 | * not vice versa. | |
917 | * | |
918 | * The return value is the final value of 'ACTIVE' flag. | |
919 | */ | |
920 | ||
d02c56cd | 921 | static unsigned |
718e3744 | 922 | nexthop_active_check (struct route_node *rn, struct rib *rib, |
923 | struct nexthop *nexthop, int set) | |
924 | { | |
925 | struct interface *ifp; | |
7514fb77 | 926 | route_map_result_t ret = RMAP_MATCH; |
7514fb77 | 927 | int family; |
05737783 CF |
928 | char buf[SRCDEST2STR_BUFFER]; |
929 | struct prefix *p, *src_p; | |
930 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
718e3744 | 931 | |
7a4bb9c5 DS |
932 | if (rn->p.family == AF_INET) |
933 | family = AFI_IP; | |
934 | else if (rn->p.family == AF_INET6) | |
935 | family = AFI_IP6; | |
936 | else | |
937 | family = 0; | |
718e3744 | 938 | switch (nexthop->type) |
939 | { | |
940 | case NEXTHOP_TYPE_IFINDEX: | |
7e2b7603 | 941 | ifp = if_lookup_by_index (nexthop->ifindex, rib->vrf_id); |
3f087670 | 942 | if (ifp && if_is_operative(ifp)) |
718e3744 | 943 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
944 | else | |
945 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
946 | break; | |
718e3744 | 947 | case NEXTHOP_TYPE_IPV4: |
948 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
7514fb77 | 949 | family = AFI_IP; |
b153b010 | 950 | if (nexthop_active (AFI_IP, rib, nexthop, set, rn)) |
718e3744 | 951 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
952 | else | |
953 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
954 | break; | |
718e3744 | 955 | case NEXTHOP_TYPE_IPV6: |
7514fb77 | 956 | family = AFI_IP6; |
b153b010 | 957 | if (nexthop_active (AFI_IP6, rib, nexthop, set, rn)) |
718e3744 | 958 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
959 | else | |
960 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
961 | break; | |
962 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
fb5d585c | 963 | /* RFC 5549, v4 prefix with v6 NH */ |
964 | if (rn->p.family != AF_INET) | |
965 | family = AFI_IP6; | |
718e3744 | 966 | if (IN6_IS_ADDR_LINKLOCAL (&nexthop->gate.ipv6)) |
967 | { | |
7e2b7603 | 968 | ifp = if_lookup_by_index (nexthop->ifindex, rib->vrf_id); |
3f087670 | 969 | if (ifp && if_is_operative(ifp)) |
718e3744 | 970 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
971 | else | |
972 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
973 | } | |
974 | else | |
975 | { | |
b153b010 | 976 | if (nexthop_active (AFI_IP6, rib, nexthop, set, rn)) |
718e3744 | 977 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
978 | else | |
979 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
980 | } | |
981 | break; | |
595db7f1 | 982 | case NEXTHOP_TYPE_BLACKHOLE: |
983 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
984 | break; | |
718e3744 | 985 | default: |
986 | break; | |
987 | } | |
7514fb77 PJ |
988 | if (! CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
989 | return 0; | |
990 | ||
f3a1732e CF |
991 | /* XXX: What exactly do those checks do? Do we support |
992 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
7514fb77 | 993 | if (RIB_SYSTEM_ROUTE(rib) || |
05737783 CF |
994 | (family == AFI_IP && p->family != AF_INET) || |
995 | (family == AFI_IP6 && p->family != AF_INET6)) | |
7514fb77 PJ |
996 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
997 | ||
f3a1732e CF |
998 | /* The original code didn't determine the family correctly |
999 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1000 | * from the rib_table_info in those cases. | |
1001 | * Possibly it may be better to use only the rib_table_info | |
1002 | * in every case. | |
1003 | */ | |
1004 | if (!family) | |
05737783 CF |
1005 | { |
1006 | rib_table_info_t *info; | |
1007 | ||
1008 | info = srcdest_rnode_table_info(rn); | |
1009 | family = info->afi; | |
1010 | } | |
f3a1732e | 1011 | |
c52ef59f | 1012 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
c52ef59f | 1013 | |
ca84c8ef | 1014 | /* It'll get set if required inside */ |
05737783 | 1015 | ret = zebra_route_map_check(family, rib->type, p, nexthop, rib->vrf_id, |
0032dd59 | 1016 | rib->tag); |
7514fb77 | 1017 | if (ret == RMAP_DENYMATCH) |
518f0eb1 DS |
1018 | { |
1019 | if (IS_ZEBRA_DEBUG_RIB) | |
1020 | { | |
05737783 CF |
1021 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
1022 | zlog_debug("%u:%s: Filtering out with NH out %s due to route map", | |
1023 | rib->vrf_id, buf, | |
baaea325 | 1024 | ifindex2ifname (nexthop->ifindex, rib->vrf_id)); |
518f0eb1 DS |
1025 | } |
1026 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1027 | } | |
718e3744 | 1028 | return CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1029 | } | |
1030 | ||
03e232a4 DO |
1031 | /* Iterate over all nexthops of the given RIB entry and refresh their |
1032 | * ACTIVE flag. rib->nexthop_active_num is updated accordingly. If any | |
1033 | * nexthop is found to toggle the ACTIVE flag, the whole rib structure | |
2f97fa65 | 1034 | * is flagged with RIB_ENTRY_CHANGED. The 4th 'set' argument is |
03e232a4 DO |
1035 | * transparently passed to nexthop_active_check(). |
1036 | * | |
1037 | * Return value is the new number of active nexthops. | |
1038 | */ | |
1039 | ||
a1ac18c4 | 1040 | static int |
718e3744 | 1041 | nexthop_active_update (struct route_node *rn, struct rib *rib, int set) |
1042 | { | |
1043 | struct nexthop *nexthop; | |
c52ef59f | 1044 | union g_addr prev_src; |
b892f1dd PJ |
1045 | unsigned int prev_active, new_active, old_num_nh; |
1046 | ifindex_t prev_index; | |
6e26278c | 1047 | old_num_nh = rib->nexthop_active_num; |
718e3744 | 1048 | |
1049 | rib->nexthop_active_num = 0; | |
2f97fa65 | 1050 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
718e3744 | 1051 | |
1052 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
03e232a4 | 1053 | { |
c52ef59f DS |
1054 | /* No protocol daemon provides src and so we're skipping tracking it */ |
1055 | prev_src = nexthop->rmap_src; | |
03e232a4 | 1056 | prev_active = CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
c3a56063 | 1057 | prev_index = nexthop->ifindex; |
03e232a4 DO |
1058 | if ((new_active = nexthop_active_check (rn, rib, nexthop, set))) |
1059 | rib->nexthop_active_num++; | |
c52ef59f | 1060 | /* Don't allow src setting on IPv6 addr for now */ |
c3a56063 | 1061 | if (prev_active != new_active || |
c52ef59f DS |
1062 | prev_index != nexthop->ifindex || |
1063 | ((nexthop->type >= NEXTHOP_TYPE_IFINDEX && | |
1064 | nexthop->type < NEXTHOP_TYPE_IPV6) && | |
0aabccc0 DD |
1065 | prev_src.ipv4.s_addr != nexthop->rmap_src.ipv4.s_addr) || |
1066 | ((nexthop->type >= NEXTHOP_TYPE_IPV6 && | |
1067 | nexthop->type < NEXTHOP_TYPE_BLACKHOLE) && | |
1068 | !(IPV6_ADDR_SAME (&prev_src.ipv6, &nexthop->rmap_src.ipv6)))) | |
6e26278c | 1069 | { |
2b50b603 | 1070 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c DS |
1071 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1072 | } | |
03e232a4 | 1073 | } |
6e26278c DS |
1074 | |
1075 | if (old_num_nh != rib->nexthop_active_num) | |
2b50b603 | 1076 | SET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
6e26278c | 1077 | |
2b50b603 | 1078 | if (CHECK_FLAG (rib->status, RIB_ENTRY_CHANGED)) |
6e26278c DS |
1079 | { |
1080 | SET_FLAG (rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); | |
1081 | } | |
1082 | ||
718e3744 | 1083 | return rib->nexthop_active_num; |
1084 | } | |
6baeb988 | 1085 | |
a64448ba DS |
1086 | /* |
1087 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
1088 | * (nexthops) must have a label. | |
1089 | */ | |
1090 | int | |
1091 | zebra_rib_labeled_unicast (struct rib *rib) | |
1092 | { | |
1093 | struct nexthop *nexthop = NULL, *tnexthop; | |
1094 | int recursing; | |
1095 | ||
1096 | if (rib->type != ZEBRA_ROUTE_BGP) | |
1097 | return 0; | |
1098 | ||
1099 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1100 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) | |
1101 | return 0; | |
6b0655a2 | 1102 | |
a64448ba DS |
1103 | return 1; |
1104 | } | |
718e3744 | 1105 | |
6ae24471 DS |
1106 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1107 | * is only used for IPv4. | |
1108 | */ | |
28f6dde8 | 1109 | int |
949ae9ba | 1110 | rib_install_kernel (struct route_node *rn, struct rib *rib, struct rib *old) |
718e3744 | 1111 | { |
1112 | int ret = 0; | |
fa713d9e | 1113 | struct nexthop *nexthop, *tnexthop; |
05737783 | 1114 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
fa713d9e | 1115 | int recursing; |
05737783 CF |
1116 | struct prefix *p, *src_p; |
1117 | ||
1118 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
718e3744 | 1119 | |
416ec78d DL |
1120 | if (info->safi != SAFI_UNICAST) |
1121 | { | |
1122 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1123 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1124 | return ret; | |
1125 | } | |
1126 | ||
5adc2528 AS |
1127 | /* |
1128 | * Make sure we update the FPM any time we send new information to | |
1129 | * the kernel. | |
1130 | */ | |
4f8ea50c | 1131 | hook_call(rib_update, rn, "installing in kernel"); |
05737783 | 1132 | ret = kernel_route_rib (p, src_p, old, rib); |
718e3744 | 1133 | |
3e5c6e00 | 1134 | /* If install succeeds, update FIB flag for nexthops. */ |
1135 | if (!ret) | |
718e3744 | 1136 | { |
fa713d9e | 1137 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1138 | { |
1139 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1140 | continue; | |
1141 | ||
1142 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1143 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1144 | else | |
1145 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1146 | } | |
718e3744 | 1147 | } |
3e5c6e00 | 1148 | |
1149 | return ret; | |
718e3744 | 1150 | } |
1151 | ||
1152 | /* Uninstall the route from kernel. */ | |
28f6dde8 | 1153 | int |
718e3744 | 1154 | rib_uninstall_kernel (struct route_node *rn, struct rib *rib) |
1155 | { | |
1156 | int ret = 0; | |
fa713d9e | 1157 | struct nexthop *nexthop, *tnexthop; |
05737783 | 1158 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
fa713d9e | 1159 | int recursing; |
05737783 CF |
1160 | struct prefix *p, *src_p; |
1161 | ||
1162 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
718e3744 | 1163 | |
416ec78d DL |
1164 | if (info->safi != SAFI_UNICAST) |
1165 | { | |
1166 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1167 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1168 | return ret; | |
1169 | } | |
1170 | ||
5adc2528 AS |
1171 | /* |
1172 | * Make sure we update the FPM any time we send new information to | |
1173 | * the kernel. | |
1174 | */ | |
4f8ea50c | 1175 | hook_call(rib_update, rn, "uninstalling from kernel"); |
05737783 | 1176 | ret = kernel_route_rib (p, src_p, rib, NULL); |
718e3744 | 1177 | |
fa713d9e | 1178 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
718e3744 | 1179 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1180 | ||
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | /* Uninstall the route from kernel. */ | |
a1ac18c4 | 1185 | static void |
718e3744 | 1186 | rib_uninstall (struct route_node *rn, struct rib *rib) |
1187 | { | |
05737783 | 1188 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
416ec78d | 1189 | |
446bb95e | 1190 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
718e3744 | 1191 | { |
416ec78d | 1192 | if (info->safi == SAFI_UNICAST) |
4f8ea50c | 1193 | hook_call(rib_update, rn, "rib_uninstall"); |
5adc2528 | 1194 | |
718e3744 | 1195 | if (! RIB_SYSTEM_ROUTE (rib)) |
1196 | rib_uninstall_kernel (rn, rib); | |
a64448ba DS |
1197 | |
1198 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1199 | if (zebra_rib_labeled_unicast (rib)) | |
1200 | zebra_mpls_lsp_uninstall (info->zvrf, rn, rib); | |
1201 | ||
1202 | UNSET_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB); | |
446bb95e TT |
1203 | } |
1204 | ||
1205 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) | |
1206 | { | |
05737783 CF |
1207 | struct prefix *p, *src_p; |
1208 | srcdest_rnode_prefixes (rn, &p, &src_p); | |
1209 | ||
1210 | redistribute_delete (p, src_p, rib); | |
718e3744 | 1211 | UNSET_FLAG (rib->flags, ZEBRA_FLAG_SELECTED); |
1212 | } | |
1213 | } | |
1214 | ||
9fd92e3c AS |
1215 | /* |
1216 | * rib_can_delete_dest | |
1217 | * | |
1218 | * Returns TRUE if the given dest can be deleted from the table. | |
1219 | */ | |
1220 | static int | |
1221 | rib_can_delete_dest (rib_dest_t *dest) | |
1222 | { | |
1223 | if (dest->routes) | |
1224 | { | |
1225 | return 0; | |
1226 | } | |
1227 | ||
5adc2528 AS |
1228 | /* |
1229 | * Don't delete the dest if we have to update the FPM about this | |
1230 | * prefix. | |
1231 | */ | |
1232 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM) || | |
1233 | CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1234 | return 0; | |
1235 | ||
9fd92e3c AS |
1236 | return 1; |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * rib_gc_dest | |
1241 | * | |
1242 | * Garbage collect the rib dest corresponding to the given route node | |
1243 | * if appropriate. | |
1244 | * | |
1245 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1246 | */ | |
1247 | int | |
1248 | rib_gc_dest (struct route_node *rn) | |
1249 | { | |
1250 | rib_dest_t *dest; | |
41ec9222 | 1251 | struct zebra_vrf *zvrf; |
9fd92e3c AS |
1252 | |
1253 | dest = rib_dest_from_rnode (rn); | |
1254 | if (!dest) | |
1255 | return 0; | |
1256 | ||
1257 | if (!rib_can_delete_dest (dest)) | |
1258 | return 0; | |
1259 | ||
41ec9222 | 1260 | zvrf = rib_dest_vrf (dest); |
2263a412 | 1261 | if (IS_ZEBRA_DEBUG_RIB) |
661512bf | 1262 | rnode_debug (rn, zvrf_id (zvrf), "removing dest from table"); |
9fd92e3c AS |
1263 | |
1264 | dest->rnode = NULL; | |
1265 | XFREE (MTYPE_RIB_DEST, dest); | |
1266 | rn->info = NULL; | |
1267 | ||
1268 | /* | |
1269 | * Release the one reference that we keep on the route node. | |
1270 | */ | |
1271 | route_unlock_node (rn); | |
1272 | return 1; | |
1273 | } | |
1274 | ||
3e5c6e00 | 1275 | static void |
446bb95e TT |
1276 | rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1277 | struct rib *new) | |
3e5c6e00 | 1278 | { |
4f8ea50c | 1279 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 1280 | |
1281 | /* Update real nexthop. This may actually determine if nexthop is active or not. */ | |
446bb95e | 1282 | if (!nexthop_active_update (rn, new, 1)) |
3e5c6e00 | 1283 | { |
446bb95e | 1284 | UNSET_FLAG(new->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1285 | return; |
1286 | } | |
1287 | ||
446bb95e | 1288 | SET_FLAG (new->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1289 | if (IS_ZEBRA_DEBUG_RIB) |
1290 | { | |
05737783 CF |
1291 | char buf[SRCDEST2STR_BUFFER]; |
1292 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1293 | zlog_debug ("%u:%s: Adding route rn %p, rib %p (type %d)", | |
1294 | zvrf_id (zvrf), buf, rn, new, new->type); | |
3e5c6e00 | 1295 | } |
1296 | ||
a64448ba DS |
1297 | /* If labeled-unicast route, install transit LSP. */ |
1298 | if (zebra_rib_labeled_unicast (new)) | |
1299 | zebra_mpls_lsp_install (zvrf, rn, new); | |
1300 | ||
446bb95e | 1301 | if (!RIB_SYSTEM_ROUTE (new)) |
3e5c6e00 | 1302 | { |
949ae9ba | 1303 | if (rib_install_kernel (rn, new, NULL)) |
3e5c6e00 | 1304 | { |
05737783 CF |
1305 | char buf[SRCDEST2STR_BUFFER]; |
1306 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1307 | zlog_warn ("%u:%s: Route install failed", | |
1308 | zvrf_id (zvrf), buf); | |
3e5c6e00 | 1309 | } |
1310 | } | |
1311 | ||
446bb95e | 1312 | UNSET_FLAG(new->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1313 | } |
1314 | ||
1315 | static void | |
446bb95e TT |
1316 | rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1317 | struct rib *old) | |
3e5c6e00 | 1318 | { |
4f8ea50c | 1319 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 1320 | |
446bb95e | 1321 | /* Uninstall from kernel. */ |
3e5c6e00 | 1322 | if (IS_ZEBRA_DEBUG_RIB) |
1323 | { | |
05737783 CF |
1324 | char buf[SRCDEST2STR_BUFFER]; |
1325 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1326 | zlog_debug ("%u:%s: Deleting route rn %p, rib %p (type %d)", | |
1327 | zvrf_id (zvrf), buf, rn, old, old->type); | |
3e5c6e00 | 1328 | } |
1329 | ||
a64448ba DS |
1330 | /* If labeled-unicast route, uninstall transit LSP. */ |
1331 | if (zebra_rib_labeled_unicast (old)) | |
1332 | zebra_mpls_lsp_uninstall (zvrf, rn, old); | |
1333 | ||
446bb95e TT |
1334 | if (!RIB_SYSTEM_ROUTE (old)) |
1335 | rib_uninstall_kernel (rn, old); | |
3e5c6e00 | 1336 | |
446bb95e | 1337 | UNSET_FLAG (old->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1338 | |
1339 | /* Update nexthop for route, reset changed flag. */ | |
446bb95e TT |
1340 | nexthop_active_update (rn, old, 1); |
1341 | UNSET_FLAG(old->status, RIB_ENTRY_CHANGED); | |
3e5c6e00 | 1342 | } |
1343 | ||
1344 | static void | |
446bb95e TT |
1345 | rib_process_update_fib (struct zebra_vrf *zvrf, struct route_node *rn, |
1346 | struct rib *old, struct rib *new) | |
3e5c6e00 | 1347 | { |
3e5c6e00 | 1348 | struct nexthop *nexthop = NULL, *tnexthop; |
1349 | int recursing; | |
1350 | int nh_active = 0; | |
1351 | int installed = 1; | |
1352 | ||
3e5c6e00 | 1353 | /* |
1354 | * We have to install or update if a new route has been selected or | |
1355 | * something has changed. | |
1356 | */ | |
446bb95e TT |
1357 | if (new != old || |
1358 | CHECK_FLAG (new->status, RIB_ENTRY_CHANGED)) | |
3e5c6e00 | 1359 | { |
4f8ea50c | 1360 | hook_call(rib_update, rn, "updating existing route"); |
3e5c6e00 | 1361 | |
1362 | /* Update the nexthop; we could determine here that nexthop is inactive. */ | |
446bb95e | 1363 | if (nexthop_active_update (rn, new, 1)) |
3e5c6e00 | 1364 | nh_active = 1; |
1365 | ||
1366 | /* If nexthop is active, install the selected route, if appropriate. If | |
1367 | * the install succeeds, cleanup flags for prior route, if different from | |
1368 | * newly selected. | |
1369 | */ | |
1370 | if (nh_active) | |
1371 | { | |
1372 | if (IS_ZEBRA_DEBUG_RIB) | |
1373 | { | |
05737783 CF |
1374 | char buf[SRCDEST2STR_BUFFER]; |
1375 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
446bb95e | 1376 | if (new != old) |
05737783 CF |
1377 | zlog_debug ("%u:%s: Updating route rn %p, rib %p (type %d) " |
1378 | "old %p (type %d)", zvrf_id (zvrf), buf, | |
446bb95e | 1379 | rn, new, new->type, old, old->type); |
3e5c6e00 | 1380 | else |
05737783 CF |
1381 | zlog_debug ("%u:%s: Updating route rn %p, rib %p (type %d)", |
1382 | zvrf_id (zvrf), buf, rn, new, new->type); | |
3e5c6e00 | 1383 | } |
71e04b9f DW |
1384 | |
1385 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1386 | if (zebra_rib_labeled_unicast (old)) | |
1387 | zebra_mpls_lsp_uninstall (zvrf, rn, old); | |
1388 | ||
3e5c6e00 | 1389 | /* Non-system route should be installed. */ |
446bb95e | 1390 | if (!RIB_SYSTEM_ROUTE (new)) |
3e5c6e00 | 1391 | { |
a64448ba DS |
1392 | /* If labeled-unicast route, install transit LSP. */ |
1393 | if (zebra_rib_labeled_unicast (new)) | |
1394 | zebra_mpls_lsp_install (zvrf, rn, new); | |
1395 | ||
949ae9ba | 1396 | if (rib_install_kernel (rn, new, old)) |
3e5c6e00 | 1397 | { |
05737783 CF |
1398 | char buf[SRCDEST2STR_BUFFER]; |
1399 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
3e5c6e00 | 1400 | installed = 0; |
05737783 | 1401 | zlog_warn ("%u:%s: Route install failed", zvrf_id (zvrf), buf); |
3e5c6e00 | 1402 | } |
1403 | } | |
1404 | ||
1405 | /* If install succeeded or system route, cleanup flags for prior route. */ | |
446bb95e | 1406 | if (installed && new != old) |
3e5c6e00 | 1407 | { |
446bb95e | 1408 | if (RIB_SYSTEM_ROUTE(new)) |
3e5c6e00 | 1409 | { |
446bb95e TT |
1410 | if (!RIB_SYSTEM_ROUTE (old)) |
1411 | rib_uninstall_kernel (rn, old); | |
3e5c6e00 | 1412 | } |
1413 | else | |
1414 | { | |
446bb95e | 1415 | for (nexthop = old->nexthop; nexthop; nexthop = nexthop->next) |
3e5c6e00 | 1416 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); |
1417 | } | |
3e5c6e00 | 1418 | } |
1419 | ||
1420 | /* Update for redistribution. */ | |
1421 | if (installed) | |
446bb95e | 1422 | SET_FLAG (new->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1423 | } |
1424 | ||
1425 | /* | |
1426 | * If nexthop for selected route is not active or install failed, we | |
1427 | * may need to uninstall and delete for redistribution. | |
1428 | */ | |
1429 | if (!nh_active || !installed) | |
1430 | { | |
3e5c6e00 | 1431 | if (IS_ZEBRA_DEBUG_RIB) |
1432 | { | |
05737783 CF |
1433 | char buf[SRCDEST2STR_BUFFER]; |
1434 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
446bb95e | 1435 | if (new != old) |
05737783 CF |
1436 | zlog_debug ("%u:%s: Deleting route rn %p, rib %p (type %d) " |
1437 | "old %p (type %d) - %s", zvrf_id (zvrf), buf, | |
446bb95e | 1438 | rn, new, new->type, old, old->type, |
3e5c6e00 | 1439 | nh_active ? "install failed" : "nexthop inactive"); |
1440 | else | |
05737783 CF |
1441 | zlog_debug ("%u:%s: Deleting route rn %p, rib %p (type %d) - %s", |
1442 | zvrf_id (zvrf), buf, rn, new, new->type, | |
3e5c6e00 | 1443 | nh_active ? "install failed" : "nexthop inactive"); |
1444 | } | |
1445 | ||
a64448ba DS |
1446 | /* If labeled-unicast route, uninstall transit LSP. */ |
1447 | if (zebra_rib_labeled_unicast (old)) | |
1448 | zebra_mpls_lsp_uninstall (zvrf, rn, old); | |
1449 | ||
446bb95e TT |
1450 | if (!RIB_SYSTEM_ROUTE (old)) |
1451 | rib_uninstall_kernel (rn, old); | |
1452 | UNSET_FLAG (new->status, RIB_ENTRY_SELECTED_FIB); | |
3e5c6e00 | 1453 | } |
1454 | } | |
1455 | else | |
1456 | { | |
1457 | /* | |
1458 | * Same route selected; check if in the FIB and if not, re-install. This | |
1459 | * is housekeeping code to deal with race conditions in kernel with linux | |
1460 | * netlink reporting interface up before IPv4 or IPv6 protocol is ready | |
1461 | * to add routes. | |
1462 | */ | |
446bb95e | 1463 | if (!RIB_SYSTEM_ROUTE (new)) |
3e5c6e00 | 1464 | { |
1465 | int in_fib = 0; | |
1466 | ||
446bb95e | 1467 | for (ALL_NEXTHOPS_RO(new->nexthop, nexthop, tnexthop, recursing)) |
3e5c6e00 | 1468 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) |
1469 | { | |
1470 | in_fib = 1; | |
1471 | break; | |
1472 | } | |
1473 | if (!in_fib) | |
949ae9ba | 1474 | rib_install_kernel (rn, new, NULL); |
3e5c6e00 | 1475 | } |
1476 | } | |
1477 | ||
1478 | /* Update prior route. */ | |
446bb95e | 1479 | if (new != old) |
3e5c6e00 | 1480 | { |
446bb95e | 1481 | UNSET_FLAG (old->status, RIB_ENTRY_SELECTED_FIB); |
3e5c6e00 | 1482 | |
1483 | /* Set real nexthop. */ | |
446bb95e TT |
1484 | nexthop_active_update (rn, old, 1); |
1485 | UNSET_FLAG(old->status, RIB_ENTRY_CHANGED); | |
3e5c6e00 | 1486 | } |
1487 | ||
1488 | /* Clear changed flag. */ | |
446bb95e | 1489 | UNSET_FLAG(new->status, RIB_ENTRY_CHANGED); |
3e5c6e00 | 1490 | } |
1491 | ||
bab85d4f CF |
1492 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1493 | static struct rib * | |
1494 | rib_choose_best (struct rib *current, struct rib *alternate) | |
1495 | { | |
1496 | if (current == NULL) | |
1497 | return alternate; | |
1498 | ||
1499 | /* filter route selection in following order: | |
1500 | * - connected beats other types | |
1501 | * - lower distance beats higher | |
1502 | * - lower metric beats higher for equal distance | |
1503 | * - last, hence oldest, route wins tie break. | |
1504 | */ | |
1505 | ||
1506 | /* Connected routes. Pick the last connected | |
1507 | * route of the set of lowest metric connected routes. | |
1508 | */ | |
1509 | if (alternate->type == ZEBRA_ROUTE_CONNECT) | |
1510 | { | |
1511 | if (current->type != ZEBRA_ROUTE_CONNECT | |
1512 | || alternate->metric <= current->metric) | |
1513 | return alternate; | |
1514 | ||
1515 | return current; | |
1516 | } | |
1517 | ||
1518 | if (current->type == ZEBRA_ROUTE_CONNECT) | |
1519 | return current; | |
1520 | ||
1521 | /* higher distance loses */ | |
1522 | if (alternate->distance < current->distance) | |
1523 | return alternate; | |
1524 | if (current->distance < alternate->distance) | |
1525 | return current; | |
1526 | ||
1527 | /* metric tie-breaks equal distance */ | |
1528 | if (alternate->metric <= current->metric) | |
1529 | return alternate; | |
1530 | ||
1531 | return current; | |
1532 | } | |
1533 | ||
718e3744 | 1534 | /* Core function for processing routing information base. */ |
e96f9203 DO |
1535 | static void |
1536 | rib_process (struct route_node *rn) | |
718e3744 | 1537 | { |
1538 | struct rib *rib; | |
1539 | struct rib *next; | |
446bb95e TT |
1540 | struct rib *old_selected = NULL; |
1541 | struct rib *new_selected = NULL; | |
1542 | struct rib *old_fib = NULL; | |
1543 | struct rib *new_fib = NULL; | |
bab85d4f | 1544 | struct rib *best = NULL; |
05737783 | 1545 | char buf[SRCDEST2STR_BUFFER]; |
41ec9222 | 1546 | rib_dest_t *dest; |
1547 | struct zebra_vrf *zvrf = NULL; | |
05737783 CF |
1548 | struct prefix *p, *src_p; |
1549 | srcdest_rnode_prefixes(rn, &p, &src_p); | |
58255d34 | 1550 | vrf_id_t vrf_id = VRF_UNKNOWN; |
41ec9222 | 1551 | |
4d38fdb4 | 1552 | assert (rn); |
446bb95e | 1553 | |
41ec9222 | 1554 | dest = rib_dest_from_rnode (rn); |
1555 | if (dest) | |
1556 | { | |
1557 | zvrf = rib_dest_vrf (dest); | |
661512bf | 1558 | vrf_id = zvrf_id (zvrf); |
41ec9222 | 1559 | } |
446bb95e | 1560 | |
41ec9222 | 1561 | if (IS_ZEBRA_DEBUG_RIB) |
05737783 | 1562 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
93bdadae | 1563 | |
41ec9222 | 1564 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
05737783 | 1565 | zlog_debug ("%u:%s: Processing rn %p", vrf_id, buf, rn); |
41ec9222 | 1566 | |
7b25dca6 | 1567 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 1568 | { |
41ec9222 | 1569 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
05737783 | 1570 | zlog_debug ("%u:%s: Examine rib %p (type %d) status %x flags %x " |
41ec9222 | 1571 | "dist %d metric %d", |
05737783 | 1572 | vrf_id, buf, rib, rib->type, rib->status, |
41ec9222 | 1573 | rib->flags, rib->distance, rib->metric); |
1574 | ||
6e26278c DS |
1575 | UNSET_FLAG(rib->status, RIB_ENTRY_NEXTHOPS_CHANGED); |
1576 | ||
446bb95e | 1577 | /* Currently selected rib. */ |
718e3744 | 1578 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED)) |
6d691129 | 1579 | { |
446bb95e TT |
1580 | assert (old_selected == NULL); |
1581 | old_selected = rib; | |
6d691129 | 1582 | } |
446bb95e TT |
1583 | /* Currently in fib */ |
1584 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) | |
510dc060 | 1585 | { |
446bb95e TT |
1586 | assert (old_fib == NULL); |
1587 | old_fib = rib; | |
510dc060 | 1588 | } |
446bb95e TT |
1589 | |
1590 | /* Skip deleted entries from selection */ | |
1591 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
1592 | continue; | |
1593 | ||
718e3744 | 1594 | /* Skip unreachable nexthop. */ |
ca657c65 DS |
1595 | /* This first call to nexthop_active_update is merely to determine if |
1596 | * there's any change to nexthops associated with this RIB entry. Now, | |
1597 | * rib_process() can be invoked due to an external event such as link | |
1598 | * down or due to next-hop-tracking evaluation. In the latter case, | |
1599 | * a decision has already been made that the NHs have changed. So, no | |
1600 | * need to invoke a potentially expensive call again. Further, since | |
1601 | * the change might be in a recursive NH which is not caught in | |
1602 | * the nexthop_active_update() code. Thus, we might miss changes to | |
1603 | * recursive NHs. | |
6e26278c | 1604 | */ |
2b50b603 | 1605 | if (!CHECK_FLAG(rib->status, RIB_ENTRY_CHANGED) && |
f857321e DW |
1606 | ! nexthop_active_update (rn, rib, 0)) |
1607 | { | |
1608 | if (rib->type == ZEBRA_ROUTE_TABLE) | |
1609 | { | |
446bb95e TT |
1610 | /* XXX: HERE BE DRAGONS!!!!! |
1611 | * In all honesty, I have not yet figured out what this part | |
1612 | * does or why the RIB_ENTRY_CHANGED test above is correct | |
1613 | * or why we need to delete a route here, and also not whether | |
1614 | * this concerns both selected and fib route, or only selected | |
1615 | * or only fib */ | |
f857321e DW |
1616 | /* This entry was denied by the 'ip protocol table' route-map, we |
1617 | * need to delete it */ | |
446bb95e | 1618 | if (rib != old_selected) |
f857321e DW |
1619 | { |
1620 | if (IS_ZEBRA_DEBUG_RIB) | |
05737783 | 1621 | zlog_debug ("%s: %s: imported via import-table but denied " |
f857321e | 1622 | "by the ip protocol table route-map", |
05737783 | 1623 | __func__, buf); |
f857321e DW |
1624 | rib_unlink (rn, rib); |
1625 | } | |
1626 | else | |
446bb95e | 1627 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
f857321e DW |
1628 | } |
1629 | ||
1630 | continue; | |
1631 | } | |
718e3744 | 1632 | |
f857321e | 1633 | /* Infinite distance. */ |
718e3744 | 1634 | if (rib->distance == DISTANCE_INFINITY) |
8733ba72 | 1635 | { |
2b50b603 | 1636 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); |
8733ba72 DS |
1637 | continue; |
1638 | } | |
718e3744 | 1639 | |
446bb95e TT |
1640 | if (CHECK_FLAG (rib->flags, ZEBRA_FLAG_FIB_OVERRIDE)) |
1641 | { | |
1642 | best = rib_choose_best(new_fib, rib); | |
1643 | if (new_fib && best != new_fib) | |
1644 | UNSET_FLAG (new_fib->status, RIB_ENTRY_CHANGED); | |
1645 | new_fib = best; | |
1646 | } | |
1647 | else | |
1648 | { | |
1649 | best = rib_choose_best(new_selected, rib); | |
1650 | if (new_selected && best != new_selected) | |
1651 | UNSET_FLAG (new_selected->status, RIB_ENTRY_CHANGED); | |
1652 | new_selected = best; | |
1653 | } | |
bab85d4f CF |
1654 | if (best != rib) |
1655 | UNSET_FLAG (rib->status, RIB_ENTRY_CHANGED); | |
446bb95e TT |
1656 | } /* RNODE_FOREACH_RIB */ |
1657 | ||
1658 | /* If no FIB override route, use the selected route also for FIB */ | |
1659 | if (new_fib == NULL) | |
1660 | new_fib = new_selected; | |
dc95824a DO |
1661 | |
1662 | /* After the cycle is finished, the following pointers will be set: | |
446bb95e TT |
1663 | * old_selected --- RIB entry currently having SELECTED |
1664 | * new_selected --- RIB entry that is newly SELECTED | |
1665 | * old_fib --- RIB entry currently in kernel FIB | |
1666 | * new_fib --- RIB entry that is newly to be in kernel FIB | |
1667 | * | |
1668 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1669 | * the zclients. new_fib (which can be new_selected) will be installed in kernel. | |
dc95824a | 1670 | */ |
446bb95e | 1671 | |
41ec9222 | 1672 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
446bb95e | 1673 | { |
05737783 CF |
1674 | zlog_debug ("%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", |
1675 | vrf_id, buf, | |
446bb95e TT |
1676 | (void *)old_selected, |
1677 | (void *)new_selected, | |
1678 | (void *)old_fib, | |
1679 | (void *)new_fib); | |
1680 | } | |
1681 | ||
1682 | /* Buffer RIB_ENTRY_CHANGED here, because it will get cleared if | |
1683 | * fib == selected */ | |
1684 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, | |
1685 | RIB_ENTRY_CHANGED); | |
1686 | ||
1687 | /* Update fib according to selection results */ | |
1688 | if (new_fib && old_fib) | |
1689 | rib_process_update_fib (zvrf, rn, old_fib, new_fib); | |
1690 | else if (new_fib) | |
1691 | rib_process_add_fib (zvrf, rn, new_fib); | |
1692 | else if (old_fib) | |
1693 | rib_process_del_fib (zvrf, rn, old_fib); | |
1694 | ||
1695 | /* Redistribute SELECTED entry */ | |
1696 | if (old_selected != new_selected || selected_changed) | |
1697 | { | |
1698 | struct nexthop *nexthop, *tnexthop; | |
1699 | int recursing; | |
1700 | ||
1701 | /* Check if we have a FIB route for the destination, otherwise, | |
1702 | * don't redistribute it */ | |
1703 | for (ALL_NEXTHOPS_RO(new_fib ? new_fib->nexthop : NULL, nexthop, | |
1704 | tnexthop, recursing)) | |
1705 | { | |
1706 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1707 | { | |
1708 | break; | |
1709 | } | |
1710 | } | |
1711 | if (!nexthop) | |
1712 | new_selected = NULL; | |
dc95824a | 1713 | |
446bb95e TT |
1714 | if (new_selected && new_selected != new_fib) |
1715 | { | |
1716 | nexthop_active_update(rn, new_selected, 1); | |
1717 | UNSET_FLAG(new_selected->status, RIB_ENTRY_CHANGED); | |
1718 | } | |
1719 | ||
1720 | if (old_selected) | |
1721 | { | |
1722 | if (!new_selected) | |
05737783 | 1723 | redistribute_delete(p, src_p, old_selected); |
446bb95e TT |
1724 | if (old_selected != new_selected) |
1725 | UNSET_FLAG (old_selected->flags, ZEBRA_FLAG_SELECTED); | |
1726 | } | |
1727 | ||
1728 | if (new_selected) | |
1729 | { | |
1730 | /* Install new or replace existing redistributed entry */ | |
1731 | SET_FLAG (new_selected->flags, ZEBRA_FLAG_SELECTED); | |
05737783 | 1732 | redistribute_update (p, src_p, new_selected, old_selected); |
446bb95e TT |
1733 | } |
1734 | } | |
3e5c6e00 | 1735 | |
446bb95e TT |
1736 | /* Remove all RIB entries queued for removal */ |
1737 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
6d691129 | 1738 | { |
446bb95e TT |
1739 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
1740 | { | |
1741 | if (IS_ZEBRA_DEBUG_RIB) | |
1742 | { | |
1743 | rnode_debug (rn, vrf_id, "rn %p, removing rib %p", | |
1744 | (void *)rn, (void *)rib); | |
1745 | } | |
1746 | rib_unlink(rn, rib); | |
1747 | } | |
6d691129 | 1748 | } |
4d38fdb4 | 1749 | |
9fd92e3c AS |
1750 | /* |
1751 | * Check if the dest can be deleted now. | |
1752 | */ | |
1753 | rib_gc_dest (rn); | |
e96f9203 DO |
1754 | } |
1755 | ||
5110a0c6 SH |
1756 | /* Take a list of route_node structs and return 1, if there was a record |
1757 | * picked from it and processed by rib_process(). Don't process more, | |
1758 | * than one RN record; operate only in the specified sub-queue. | |
e96f9203 | 1759 | */ |
ef9b113e | 1760 | static unsigned int |
e96f9203 DO |
1761 | process_subq (struct list * subq, u_char qindex) |
1762 | { | |
5110a0c6 | 1763 | struct listnode *lnode = listhead (subq); |
e96f9203 | 1764 | struct route_node *rnode; |
41ec9222 | 1765 | rib_dest_t *dest; |
1766 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 SH |
1767 | |
1768 | if (!lnode) | |
e96f9203 | 1769 | return 0; |
5110a0c6 | 1770 | |
e96f9203 | 1771 | rnode = listgetdata (lnode); |
41ec9222 | 1772 | dest = rib_dest_from_rnode (rnode); |
1773 | if (dest) | |
1774 | zvrf = rib_dest_vrf (dest); | |
1775 | ||
e96f9203 | 1776 | rib_process (rnode); |
5110a0c6 | 1777 | |
41ec9222 | 1778 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1779 | { | |
05737783 CF |
1780 | char buf[SRCDEST2STR_BUFFER]; |
1781 | srcdest_rnode2str(rnode, buf, sizeof(buf)); | |
1782 | zlog_debug ("%u:%s: rn %p dequeued from sub-queue %u", | |
1783 | zvrf ? zvrf_id (zvrf) : 0, buf, rnode, qindex); | |
41ec9222 | 1784 | } |
1785 | ||
9fd92e3c AS |
1786 | if (rnode->info) |
1787 | UNSET_FLAG (rib_dest_from_rnode (rnode)->flags, RIB_ROUTE_QUEUED (qindex)); | |
1788 | ||
67b9467f | 1789 | #if 0 |
5110a0c6 SH |
1790 | else |
1791 | { | |
1792 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1793 | __func__, rnode, rnode->lock); | |
1794 | zlog_backtrace(LOG_DEBUG); | |
1795 | } | |
67b9467f | 1796 | #endif |
e96f9203 DO |
1797 | route_unlock_node (rnode); |
1798 | list_delete_node (subq, lnode); | |
1799 | return 1; | |
1800 | } | |
1801 | ||
fb018d25 DS |
1802 | /* |
1803 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1804 | */ | |
1805 | static void | |
1806 | meta_queue_process_complete (struct work_queue *dummy) | |
1807 | { | |
1a1a7065 | 1808 | struct vrf *vrf; |
9ec6b0bb | 1809 | struct zebra_vrf *zvrf; |
1810 | ||
1811 | /* Evaluate nexthops for those VRFs which underwent route processing. This | |
1812 | * should limit the evaluation to the necessary VRFs in most common | |
1813 | * situations. | |
1814 | */ | |
1a1a7065 | 1815 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
9ec6b0bb | 1816 | { |
1a1a7065 RW |
1817 | zvrf = vrf->info; |
1818 | if (zvrf == NULL || !(zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
1819 | continue; | |
1820 | ||
1821 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
661512bf RW |
1822 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
1823 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
1824 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); | |
1825 | zebra_evaluate_rnh(zvrf_id (zvrf), AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, NULL); | |
9ec6b0bb | 1826 | } |
939fba27 | 1827 | |
1828 | /* Schedule LSPs for processing, if needed. */ | |
1829 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1830 | if (mpls_should_lsps_be_processed(zvrf)) | |
1831 | { | |
1832 | if (IS_ZEBRA_DEBUG_MPLS) | |
661512bf | 1833 | zlog_debug ("%u: Scheduling all LSPs upon RIB completion", zvrf_id (zvrf)); |
939fba27 | 1834 | zebra_mpls_lsp_schedule (zvrf); |
1835 | mpls_unmark_lsps_for_processing(zvrf); | |
1836 | } | |
fb018d25 DS |
1837 | } |
1838 | ||
e96f9203 DO |
1839 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
1840 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and data | |
1841 | * is pointed to the meta queue structure. | |
1842 | */ | |
1843 | static wq_item_status | |
1844 | meta_queue_process (struct work_queue *dummy, void *data) | |
1845 | { | |
1846 | struct meta_queue * mq = data; | |
5110a0c6 SH |
1847 | unsigned i; |
1848 | ||
e96f9203 DO |
1849 | for (i = 0; i < MQ_SIZE; i++) |
1850 | if (process_subq (mq->subq[i], i)) | |
5110a0c6 SH |
1851 | { |
1852 | mq->size--; | |
1853 | break; | |
1854 | } | |
e96f9203 DO |
1855 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; |
1856 | } | |
1857 | ||
9fd92e3c AS |
1858 | /* |
1859 | * Map from rib types to queue type (priority) in meta queue | |
1860 | */ | |
5110a0c6 SH |
1861 | static const u_char meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1862 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1863 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1864 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1865 | [ZEBRA_ROUTE_STATIC] = 1, | |
1866 | [ZEBRA_ROUTE_RIP] = 2, | |
1867 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1868 | [ZEBRA_ROUTE_OSPF] = 2, | |
1869 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1870 | [ZEBRA_ROUTE_ISIS] = 2, | |
2fb975da | 1871 | [ZEBRA_ROUTE_NHRP] = 2, |
5110a0c6 SH |
1872 | [ZEBRA_ROUTE_BGP] = 3, |
1873 | [ZEBRA_ROUTE_HSLS] = 4, | |
7a4bb9c5 | 1874 | [ZEBRA_ROUTE_TABLE] = 1, |
5110a0c6 SH |
1875 | }; |
1876 | ||
1877 | /* Look into the RN and queue it into one or more priority queues, | |
1878 | * increasing the size for each data push done. | |
e96f9203 | 1879 | */ |
ef9b113e SH |
1880 | static void |
1881 | rib_meta_queue_add (struct meta_queue *mq, struct route_node *rn) | |
e96f9203 | 1882 | { |
e96f9203 | 1883 | struct rib *rib; |
5110a0c6 | 1884 | |
9fd92e3c | 1885 | RNODE_FOREACH_RIB (rn, rib) |
e96f9203 | 1886 | { |
5110a0c6 | 1887 | u_char qindex = meta_queue_map[rib->type]; |
9ec6b0bb | 1888 | struct zebra_vrf *zvrf; |
5110a0c6 SH |
1889 | |
1890 | /* Invariant: at this point we always have rn->info set. */ | |
9fd92e3c AS |
1891 | if (CHECK_FLAG (rib_dest_from_rnode (rn)->flags, |
1892 | RIB_ROUTE_QUEUED (qindex))) | |
2263a412 DL |
1893 | { |
1894 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1895 | rnode_debug (rn, rib->vrf_id, "rn %p is already queued in sub-queue %u", | |
6c4f4e6e | 1896 | (void *)rn, qindex); |
2263a412 DL |
1897 | continue; |
1898 | } | |
5110a0c6 | 1899 | |
9fd92e3c | 1900 | SET_FLAG (rib_dest_from_rnode (rn)->flags, RIB_ROUTE_QUEUED (qindex)); |
5110a0c6 SH |
1901 | listnode_add (mq->subq[qindex], rn); |
1902 | route_lock_node (rn); | |
1903 | mq->size++; | |
1904 | ||
41ec9222 | 1905 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 1906 | rnode_debug (rn, rib->vrf_id, "queued rn %p into sub-queue %u", |
6c4f4e6e | 1907 | (void *)rn, qindex); |
9ec6b0bb | 1908 | |
5f3d1bdf | 1909 | zvrf = zebra_vrf_lookup_by_id (rib->vrf_id); |
9ec6b0bb | 1910 | if (zvrf) |
1911 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
e96f9203 | 1912 | } |
4d38fdb4 | 1913 | } |
1914 | ||
6d691129 | 1915 | /* Add route_node to work queue and schedule processing */ |
6e26278c | 1916 | void |
44e9909d | 1917 | rib_queue_add (struct route_node *rn) |
4d38fdb4 | 1918 | { |
44e9909d | 1919 | assert (rn); |
4d38fdb4 | 1920 | |
fc328ac9 | 1921 | /* Pointless to queue a route_node with no RIB entries to add or remove */ |
9fd92e3c | 1922 | if (!rnode_to_ribs (rn)) |
6d691129 | 1923 | { |
fc328ac9 | 1924 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", |
6c4f4e6e | 1925 | __func__, (void *)rn, rn->lock); |
fc328ac9 SV |
1926 | zlog_backtrace(LOG_DEBUG); |
1927 | return; | |
1928 | } | |
1929 | ||
44e9909d | 1930 | if (zebrad.ribq == NULL) |
fc328ac9 SV |
1931 | { |
1932 | zlog_err ("%s: work_queue does not exist!", __func__); | |
1933 | return; | |
4d38fdb4 | 1934 | } |
4d38fdb4 | 1935 | |
cc2dd928 SH |
1936 | /* |
1937 | * The RIB queue should normally be either empty or holding the only | |
1938 | * work_queue_item element. In the latter case this element would | |
1939 | * hold a pointer to the meta queue structure, which must be used to | |
1940 | * actually queue the route nodes to process. So create the MQ | |
1941 | * holder, if necessary, then push the work into it in any case. | |
e96f9203 DO |
1942 | * This semantics was introduced after 0.99.9 release. |
1943 | */ | |
44e9909d DS |
1944 | if (!zebrad.ribq->items->count) |
1945 | work_queue_add (zebrad.ribq, zebrad.mq); | |
e96f9203 | 1946 | |
44e9909d | 1947 | rib_meta_queue_add (zebrad.mq, rn); |
fc328ac9 | 1948 | |
fc328ac9 | 1949 | return; |
4d38fdb4 | 1950 | } |
1951 | ||
5110a0c6 SH |
1952 | /* Create new meta queue. |
1953 | A destructor function doesn't seem to be necessary here. | |
1954 | */ | |
ef9b113e SH |
1955 | static struct meta_queue * |
1956 | meta_queue_new (void) | |
e96f9203 DO |
1957 | { |
1958 | struct meta_queue *new; | |
5110a0c6 SH |
1959 | unsigned i; |
1960 | ||
1961 | new = XCALLOC (MTYPE_WORK_QUEUE, sizeof (struct meta_queue)); | |
1962 | assert(new); | |
e96f9203 | 1963 | |
e96f9203 | 1964 | for (i = 0; i < MQ_SIZE; i++) |
5110a0c6 SH |
1965 | { |
1966 | new->subq[i] = list_new (); | |
1967 | assert(new->subq[i]); | |
1968 | } | |
1969 | ||
e96f9203 DO |
1970 | return new; |
1971 | } | |
1972 | ||
5a8dfcd8 RW |
1973 | void |
1974 | meta_queue_free (struct meta_queue *mq) | |
1975 | { | |
1976 | unsigned i; | |
1977 | ||
1978 | for (i = 0; i < MQ_SIZE; i++) | |
1979 | list_delete (mq->subq[i]); | |
1980 | ||
1981 | XFREE (MTYPE_WORK_QUEUE, mq); | |
1982 | } | |
1983 | ||
4d38fdb4 | 1984 | /* initialise zebra rib work queue */ |
a1ac18c4 | 1985 | static void |
4d38fdb4 | 1986 | rib_queue_init (struct zebra_t *zebra) |
1987 | { | |
fc328ac9 SV |
1988 | assert (zebra); |
1989 | ||
4d38fdb4 | 1990 | if (! (zebra->ribq = work_queue_new (zebra->master, |
6d691129 | 1991 | "route_node processing"))) |
4d38fdb4 | 1992 | { |
6d691129 | 1993 | zlog_err ("%s: could not initialise work queue!", __func__); |
4d38fdb4 | 1994 | return; |
1995 | } | |
1996 | ||
1997 | /* fill in the work queue spec */ | |
e96f9203 | 1998 | zebra->ribq->spec.workfunc = &meta_queue_process; |
4d38fdb4 | 1999 | zebra->ribq->spec.errorfunc = NULL; |
fb018d25 | 2000 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; |
4d38fdb4 | 2001 | /* XXX: TODO: These should be runtime configurable via vty */ |
2002 | zebra->ribq->spec.max_retries = 3; | |
457eb9af | 2003 | zebra->ribq->spec.hold = rib_process_hold_time; |
4d38fdb4 | 2004 | |
e96f9203 | 2005 | if (!(zebra->mq = meta_queue_new ())) |
fc328ac9 | 2006 | { |
e96f9203 | 2007 | zlog_err ("%s: could not initialise meta queue!", __func__); |
fc328ac9 SV |
2008 | return; |
2009 | } | |
2010 | return; | |
718e3744 | 2011 | } |
2012 | ||
6d691129 PJ |
2013 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2014 | * | |
2015 | * The queue length is bounded by the maximal size of the routing table, | |
2016 | * as a route_node will not be requeued, if already queued. | |
2017 | * | |
3c0755dc | 2018 | * RIBs are submitted via rib_addnode or rib_delnode which set minimal |
bcd548ff | 2019 | * state, or static_install_route (when an existing RIB is updated) |
3c0755dc PJ |
2020 | * and then submit route_node to queue for best-path selection later. |
2021 | * Order of add/delete state changes are preserved for any given RIB. | |
6d691129 PJ |
2022 | * |
2023 | * Deleted RIBs are reaped during best-path selection. | |
2024 | * | |
2025 | * rib_addnode | |
2026 | * |-> rib_link or unset RIB_ENTRY_REMOVE |->Update kernel with | |
3c0755dc PJ |
2027 | * |-------->| | best RIB, if required |
2028 | * | | | |
2029 | * static_install->|->rib_addqueue...... -> rib_process | |
2030 | * | | | |
2031 | * |-------->| |-> rib_unlink | |
6d691129 PJ |
2032 | * |-> set RIB_ENTRY_REMOVE | |
2033 | * rib_delnode (RIB freed) | |
2034 | * | |
9fd92e3c AS |
2035 | * The 'info' pointer of a route_node points to a rib_dest_t |
2036 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2037 | * dest is created on-demand by rib_link() and is kept around at least | |
2038 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
6d691129 PJ |
2039 | * |
2040 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): | |
2041 | * | |
2042 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2043 | * - dest attached to route_node: |
2044 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2045 | * - route_node processing queue |
2046 | * - managed by: rib_addqueue, rib_process. | |
2047 | * | |
2048 | */ | |
2049 | ||
718e3744 | 2050 | /* Add RIB to head of the route node. */ |
a1ac18c4 | 2051 | static void |
2bf26d41 | 2052 | rib_link (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2053 | { |
2054 | struct rib *head; | |
9fd92e3c | 2055 | rib_dest_t *dest; |
7a4bb9c5 | 2056 | afi_t afi; |
8902474b | 2057 | const char *rmap_name; |
9fd92e3c | 2058 | |
4d38fdb4 | 2059 | assert (rib && rn); |
2060 | ||
9fd92e3c AS |
2061 | dest = rib_dest_from_rnode (rn); |
2062 | if (!dest) | |
6d691129 | 2063 | { |
41ec9222 | 2064 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2263a412 | 2065 | rnode_debug (rn, rib->vrf_id, "rn %p adding dest", rn); |
9fd92e3c AS |
2066 | |
2067 | dest = XCALLOC (MTYPE_RIB_DEST, sizeof (rib_dest_t)); | |
2068 | route_lock_node (rn); /* rn route table reference */ | |
2069 | rn->info = dest; | |
2070 | dest->rnode = rn; | |
2071 | } | |
2072 | ||
2073 | head = dest->routes; | |
2074 | if (head) | |
2075 | { | |
6d691129 | 2076 | head->prev = rib; |
6d691129 | 2077 | } |
718e3744 | 2078 | rib->next = head; |
9fd92e3c | 2079 | dest->routes = rib; |
7a4bb9c5 | 2080 | |
12f6fb97 DS |
2081 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2082 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2083 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
8902474b DS |
2084 | { |
2085 | rmap_name = zebra_get_import_table_route_map (afi, rib->table); | |
2086 | zebra_add_import_table_entry(rn, rib, rmap_name); | |
2087 | } | |
7a4bb9c5 | 2088 | else |
12f6fb97 | 2089 | if (process) |
44e9909d | 2090 | rib_queue_add (rn); |
718e3744 | 2091 | } |
2092 | ||
28f6dde8 | 2093 | void |
2bf26d41 | 2094 | rib_addnode (struct route_node *rn, struct rib *rib, int process) |
718e3744 | 2095 | { |
6d691129 PJ |
2096 | /* RIB node has been un-removed before route-node is processed. |
2097 | * route_node must hence already be on the queue for processing.. | |
2098 | */ | |
2099 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
2100 | { | |
2263a412 | 2101 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2102 | rnode_debug (rn, rib->vrf_id, "rn %p, un-removed rib %p", (void *)rn, (void *)rib); |
2263a412 | 2103 | |
6d691129 PJ |
2104 | UNSET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
2105 | return; | |
2106 | } | |
2bf26d41 | 2107 | rib_link (rn, rib, process); |
6d691129 PJ |
2108 | } |
2109 | ||
9fd92e3c AS |
2110 | /* |
2111 | * rib_unlink | |
2112 | * | |
2113 | * Detach a rib structure from a route_node. | |
2114 | * | |
2115 | * Note that a call to rib_unlink() should be followed by a call to | |
2116 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2117 | * longer required to be deleted. | |
2118 | */ | |
5a8dfcd8 | 2119 | void |
6d691129 PJ |
2120 | rib_unlink (struct route_node *rn, struct rib *rib) |
2121 | { | |
9fd92e3c | 2122 | rib_dest_t *dest; |
6d691129 | 2123 | |
4d38fdb4 | 2124 | assert (rn && rib); |
6d691129 | 2125 | |
2263a412 | 2126 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2127 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p", (void *)rn, (void *)rib); |
2263a412 | 2128 | |
9fd92e3c AS |
2129 | dest = rib_dest_from_rnode (rn); |
2130 | ||
718e3744 | 2131 | if (rib->next) |
2132 | rib->next->prev = rib->prev; | |
6d691129 | 2133 | |
718e3744 | 2134 | if (rib->prev) |
2135 | rib->prev->next = rib->next; | |
2136 | else | |
6d691129 | 2137 | { |
9fd92e3c | 2138 | dest->routes = rib->next; |
6d691129 PJ |
2139 | } |
2140 | ||
2141 | /* free RIB and nexthops */ | |
d82ae0de | 2142 | zebra_deregister_rnh_static_nexthops (rib->vrf_id, rib->nexthop, rn); |
a399694f | 2143 | nexthops_free(rib->nexthop); |
6d691129 PJ |
2144 | XFREE (MTYPE_RIB, rib); |
2145 | ||
6d691129 PJ |
2146 | } |
2147 | ||
28f6dde8 | 2148 | void |
6d691129 PJ |
2149 | rib_delnode (struct route_node *rn, struct rib *rib) |
2150 | { | |
7a4bb9c5 DS |
2151 | afi_t afi; |
2152 | ||
2263a412 | 2153 | if (IS_ZEBRA_DEBUG_RIB) |
6c4f4e6e | 2154 | rnode_debug (rn, rib->vrf_id, "rn %p, rib %p, removing", (void *)rn, (void *)rib); |
6d691129 | 2155 | SET_FLAG (rib->status, RIB_ENTRY_REMOVED); |
7a4bb9c5 | 2156 | |
12f6fb97 DS |
2157 | afi = (rn->p.family == AF_INET) ? AFI_IP : |
2158 | (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2159 | if (is_zebra_import_table_enabled (afi, rib->table)) | |
7a4bb9c5 | 2160 | { |
12f6fb97 | 2161 | zebra_del_import_table_entry(rn, rib); |
7a4bb9c5 | 2162 | /* Just clean up if non main table */ |
41ec9222 | 2163 | if (IS_ZEBRA_DEBUG_RIB) |
2164 | { | |
05737783 CF |
2165 | char buf[SRCDEST2STR_BUFFER]; |
2166 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2167 | zlog_debug ("%u:%s: Freeing route rn %p, rib %p (type %d)", | |
2168 | rib->vrf_id, buf, rn, rib, rib->type); | |
41ec9222 | 2169 | } |
2170 | ||
7a4bb9c5 DS |
2171 | rib_unlink(rn, rib); |
2172 | } | |
12f6fb97 DS |
2173 | else |
2174 | { | |
44e9909d | 2175 | rib_queue_add (rn); |
12f6fb97 | 2176 | } |
718e3744 | 2177 | } |
2178 | ||
dc95824a DO |
2179 | /* This function dumps the contents of a given RIB entry into |
2180 | * standard debug log. Calling function name and IP prefix in | |
2181 | * question are passed as 1st and 2nd arguments. | |
2182 | */ | |
2183 | ||
f7bf4153 | 2184 | void _rib_dump (const char * func, |
78b81eaa | 2185 | union prefixconstptr pp, |
2186 | union prefixconstptr src_pp, | |
05737783 | 2187 | const struct rib * rib) |
dc95824a | 2188 | { |
f7bf4153 | 2189 | const struct prefix *p = pp.p; |
05737783 CF |
2190 | const struct prefix *src_p = src_pp.p; |
2191 | bool is_srcdst = src_p && src_p->prefixlen; | |
35d921cc | 2192 | char straddr[PREFIX_STRLEN]; |
05737783 | 2193 | char srcaddr[PREFIX_STRLEN]; |
fa713d9e CF |
2194 | struct nexthop *nexthop, *tnexthop; |
2195 | int recursing; | |
dc95824a | 2196 | |
05737783 CF |
2197 | zlog_debug ("%s: dumping RIB entry %p for %s%s%s vrf %u", func, (const void *)rib, |
2198 | prefix2str(pp, straddr, sizeof(straddr)), | |
2199 | is_srcdst ? " from " : "", | |
2200 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) : "", | |
2201 | rib->vrf_id); | |
dc95824a DO |
2202 | zlog_debug |
2203 | ( | |
7c8ff89e | 2204 | "%s: refcnt == %lu, uptime == %lu, type == %u, instance == %d, table == %d", |
dc95824a DO |
2205 | func, |
2206 | rib->refcnt, | |
d02c56cd | 2207 | (unsigned long) rib->uptime, |
dc95824a | 2208 | rib->type, |
7c8ff89e | 2209 | rib->instance, |
dc95824a DO |
2210 | rib->table |
2211 | ); | |
2212 | zlog_debug | |
2213 | ( | |
c50ca33a | 2214 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", |
dc95824a DO |
2215 | func, |
2216 | rib->metric, | |
c50ca33a | 2217 | rib->mtu, |
dc95824a DO |
2218 | rib->distance, |
2219 | rib->flags, | |
2220 | rib->status | |
2221 | ); | |
2222 | zlog_debug | |
2223 | ( | |
e3edd1d1 | 2224 | "%s: nexthop_num == %u, nexthop_active_num == %u", |
dc95824a DO |
2225 | func, |
2226 | rib->nexthop_num, | |
e3edd1d1 | 2227 | rib->nexthop_active_num |
dc95824a | 2228 | ); |
fed643f4 | 2229 | |
fa713d9e CF |
2230 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
2231 | { | |
fed643f4 | 2232 | inet_ntop (p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
fa713d9e CF |
2233 | zlog_debug |
2234 | ( | |
2235 | "%s: %s %s with flags %s%s%s", | |
2236 | func, | |
2237 | (recursing ? " NH" : "NH"), | |
2238 | straddr, | |
2239 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE) ? "ACTIVE " : ""), | |
2240 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB) ? "FIB " : ""), | |
2241 | (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE) ? "RECURSIVE" : "") | |
2242 | ); | |
2243 | } | |
dc95824a DO |
2244 | zlog_debug ("%s: dump complete", func); |
2245 | } | |
2246 | ||
2247 | /* This is an exported helper to rtm_read() to dump the strange | |
2248 | * RIB entry found by rib_lookup_ipv4_route() | |
2249 | */ | |
2250 | ||
12f6fb97 | 2251 | void rib_lookup_and_dump (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
dc95824a DO |
2252 | { |
2253 | struct route_table *table; | |
2254 | struct route_node *rn; | |
2255 | struct rib *rib; | |
2256 | char prefix_buf[INET_ADDRSTRLEN]; | |
2257 | ||
2258 | /* Lookup table. */ | |
12f6fb97 | 2259 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
dc95824a DO |
2260 | if (! table) |
2261 | { | |
b72ede27 | 2262 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
dc95824a DO |
2263 | return; |
2264 | } | |
2265 | ||
dc95824a DO |
2266 | /* Scan the RIB table for exactly matching RIB entry. */ |
2267 | rn = route_node_lookup (table, (struct prefix *) p); | |
2268 | ||
2269 | /* No route for this prefix. */ | |
2270 | if (! rn) | |
2271 | { | |
35d921cc TT |
2272 | zlog_debug ("%s: lookup failed for %s", __func__, |
2273 | prefix2str((struct prefix*) p, prefix_buf, sizeof(prefix_buf))); | |
dc95824a DO |
2274 | return; |
2275 | } | |
2276 | ||
2277 | /* Unlock node. */ | |
2278 | route_unlock_node (rn); | |
2279 | ||
2280 | /* let's go */ | |
9fd92e3c | 2281 | RNODE_FOREACH_RIB (rn, rib) |
dc95824a DO |
2282 | { |
2283 | zlog_debug | |
2284 | ( | |
2285 | "%s: rn %p, rib %p: %s, %s", | |
2286 | __func__, | |
6c4f4e6e DL |
2287 | (void *)rn, |
2288 | (void *)rib, | |
dc95824a DO |
2289 | (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED) ? "removed" : "NOT removed"), |
2290 | (CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELECTED) ? "selected" : "NOT selected") | |
2291 | ); | |
05737783 | 2292 | rib_dump (p, NULL, rib); |
dc95824a DO |
2293 | } |
2294 | } | |
2295 | ||
20e5ff0a DO |
2296 | /* Check if requested address assignment will fail due to another |
2297 | * route being installed by zebra in FIB already. Take necessary | |
2298 | * actions, if needed: remove such a route from FIB and deSELECT | |
2299 | * corresponding RIB entry. Then put affected RN into RIBQ head. | |
2300 | */ | |
12f6fb97 | 2301 | void rib_lookup_and_pushup (struct prefix_ipv4 * p, vrf_id_t vrf_id) |
20e5ff0a DO |
2302 | { |
2303 | struct route_table *table; | |
2304 | struct route_node *rn; | |
2305 | struct rib *rib; | |
2306 | unsigned changed = 0; | |
2307 | ||
12f6fb97 | 2308 | if (NULL == (table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id))) |
20e5ff0a | 2309 | { |
b72ede27 | 2310 | zlog_err ("%s: zebra_vrf_table() returned NULL", __func__); |
20e5ff0a DO |
2311 | return; |
2312 | } | |
2313 | ||
2314 | /* No matches would be the simplest case. */ | |
2315 | if (NULL == (rn = route_node_lookup (table, (struct prefix *) p))) | |
2316 | return; | |
2317 | ||
2318 | /* Unlock node. */ | |
2319 | route_unlock_node (rn); | |
2320 | ||
2321 | /* Check all RIB entries. In case any changes have to be done, requeue | |
2322 | * the RN into RIBQ head. If the routing message about the new connected | |
2323 | * route (generated by the IP address we are going to assign very soon) | |
2324 | * comes before the RIBQ is processed, the new RIB entry will join | |
2325 | * RIBQ record already on head. This is necessary for proper revalidation | |
2326 | * of the rest of the RIB. | |
2327 | */ | |
9fd92e3c | 2328 | RNODE_FOREACH_RIB (rn, rib) |
20e5ff0a | 2329 | { |
446bb95e | 2330 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB) && |
20e5ff0a DO |
2331 | ! RIB_SYSTEM_ROUTE (rib)) |
2332 | { | |
2333 | changed = 1; | |
2334 | if (IS_ZEBRA_DEBUG_RIB) | |
2335 | { | |
35d921cc TT |
2336 | char buf[PREFIX_STRLEN]; |
2337 | zlog_debug ("%u:%s: freeing way for connected prefix", | |
2338 | rib->vrf_id, prefix2str(&rn->p, buf, sizeof(buf))); | |
05737783 | 2339 | rib_dump (&rn->p, NULL, rib); |
20e5ff0a DO |
2340 | } |
2341 | rib_uninstall (rn, rib); | |
2342 | } | |
2343 | } | |
2344 | if (changed) | |
44e9909d | 2345 | rib_queue_add (rn); |
20e5ff0a DO |
2346 | } |
2347 | ||
718e3744 | 2348 | int |
b4c034b0 | 2349 | rib_add_multipath (afi_t afi, safi_t safi, struct prefix *p, |
3c7c91d0 | 2350 | struct prefix_ipv6 *src_p, struct rib *rib) |
718e3744 | 2351 | { |
2352 | struct route_table *table; | |
2353 | struct route_node *rn; | |
2354 | struct rib *same; | |
2355 | struct nexthop *nexthop; | |
04b02fda | 2356 | int ret = 0; |
b4c034b0 DS |
2357 | int family; |
2358 | ||
2359 | if (!rib) | |
2360 | return 0; | |
2361 | ||
2362 | if (p->family == AF_INET) | |
2363 | family = AFI_IP; | |
2364 | else | |
2365 | family = AFI_IP6; | |
2366 | ||
05737783 CF |
2367 | assert(!src_p || family == AFI_IP6); |
2368 | ||
718e3744 | 2369 | /* Lookup table. */ |
b4c034b0 | 2370 | table = zebra_vrf_table_with_table_id (family, safi, rib->vrf_id, rib->table); |
718e3744 | 2371 | if (! table) |
2372 | return 0; | |
cddf391b | 2373 | |
718e3744 | 2374 | /* Make it sure prefixlen is applied to the prefix. */ |
b4c034b0 | 2375 | apply_mask (p); |
05737783 CF |
2376 | if (src_p) |
2377 | apply_mask_ipv6 (src_p); | |
718e3744 | 2378 | |
2379 | /* Set default distance by route type. */ | |
2380 | if (rib->distance == 0) | |
2381 | { | |
2382 | rib->distance = route_info[rib->type].distance; | |
2383 | ||
2384 | /* iBGP distance is 200. */ | |
2385 | if (rib->type == ZEBRA_ROUTE_BGP | |
2386 | && CHECK_FLAG (rib->flags, ZEBRA_FLAG_IBGP)) | |
2387 | rib->distance = 200; | |
2388 | } | |
2389 | ||
2390 | /* Lookup route node.*/ | |
05737783 | 2391 | rn = srcdest_rnode_get (table, p, src_p); |
718e3744 | 2392 | |
2393 | /* If same type of route are installed, treat it as a implicit | |
2394 | withdraw. */ | |
9fd92e3c | 2395 | RNODE_FOREACH_RIB (rn, same) |
718e3744 | 2396 | { |
0b8c4f1d | 2397 | if (CHECK_FLAG (same->status, RIB_ENTRY_REMOVED)) |
6d691129 PJ |
2398 | continue; |
2399 | ||
7c8ff89e DS |
2400 | if (same->type == rib->type && same->instance == rib->instance |
2401 | && same->table == rib->table | |
718e3744 | 2402 | && same->type != ZEBRA_ROUTE_CONNECT) |
4d38fdb4 | 2403 | break; |
718e3744 | 2404 | } |
4d38fdb4 | 2405 | |
718e3744 | 2406 | /* If this route is kernel route, set FIB flag to the route. */ |
2407 | if (rib->type == ZEBRA_ROUTE_KERNEL || rib->type == ZEBRA_ROUTE_CONNECT) | |
2408 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2409 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2410 | ||
2411 | /* Link new rib to node.*/ | |
41ec9222 | 2412 | if (IS_ZEBRA_DEBUG_RIB) |
2413 | { | |
05737783 CF |
2414 | rnode_debug(rn, rib->vrf_id, "Inserting route rn %p, rib %p (type %d) existing %p", |
2415 | (void *)rn, (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2416 | |
2417 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
05737783 | 2418 | rib_dump (p, src_p, rib); |
41ec9222 | 2419 | } |
2bf26d41 | 2420 | rib_addnode (rn, rib, 1); |
04b02fda | 2421 | ret = 1; |
718e3744 | 2422 | |
718e3744 | 2423 | /* Free implicit route.*/ |
2424 | if (same) | |
dc95824a | 2425 | { |
41ec9222 | 2426 | rib_delnode (rn, same); |
2427 | ret = -1; | |
dc95824a | 2428 | } |
4d38fdb4 | 2429 | |
2430 | route_unlock_node (rn); | |
04b02fda | 2431 | return ret; |
718e3744 | 2432 | } |
2433 | ||
265d5b9d | 2434 | void |
616368ed | 2435 | rib_delete (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, u_short instance, |
3c7c91d0 DL |
2436 | int flags, struct prefix *p, struct prefix_ipv6 *src_p, |
2437 | union g_addr *gate, ifindex_t ifindex, u_int32_t table_id) | |
718e3744 | 2438 | { |
2439 | struct route_table *table; | |
2440 | struct route_node *rn; | |
2441 | struct rib *rib; | |
2442 | struct rib *fib = NULL; | |
2443 | struct rib *same = NULL; | |
fa713d9e CF |
2444 | struct nexthop *nexthop, *tnexthop; |
2445 | int recursing; | |
41ec9222 | 2446 | char buf2[INET6_ADDRSTRLEN]; |
718e3744 | 2447 | |
05737783 CF |
2448 | assert(!src_p || afi == AFI_IP6); |
2449 | ||
718e3744 | 2450 | /* Lookup table. */ |
616368ed | 2451 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2452 | if (! table) |
265d5b9d | 2453 | return; |
718e3744 | 2454 | |
2455 | /* Apply mask. */ | |
616368ed | 2456 | apply_mask (p); |
05737783 CF |
2457 | if (src_p) |
2458 | apply_mask_ipv6 (src_p); | |
718e3744 | 2459 | |
2460 | /* Lookup route node. */ | |
05737783 | 2461 | rn = srcdest_rnode_lookup (table, p, src_p); |
718e3744 | 2462 | if (! rn) |
2463 | { | |
05737783 CF |
2464 | char dst_buf[PREFIX_STRLEN], src_buf[PREFIX_STRLEN]; |
2465 | ||
2466 | prefix2str(p, dst_buf, sizeof(dst_buf)); | |
2467 | if (src_p && src_p->prefixlen) | |
2468 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
2469 | else | |
2470 | src_buf[0] = '\0'; | |
2471 | ||
41ec9222 | 2472 | if (IS_ZEBRA_DEBUG_RIB) |
05737783 CF |
2473 | zlog_debug ("%u:%s%s%s doesn't exist in rib", |
2474 | vrf_id, dst_buf, | |
2475 | (src_buf[0] != '\0') ? " from " : "", | |
2476 | src_buf); | |
265d5b9d | 2477 | return; |
718e3744 | 2478 | } |
2479 | ||
2480 | /* Lookup same type route. */ | |
9fd92e3c | 2481 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2482 | { |
6d691129 PJ |
2483 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2484 | continue; | |
2485 | ||
446bb95e | 2486 | if (CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
718e3744 | 2487 | fib = rib; |
2488 | ||
ebf1ead0 | 2489 | if (rib->type != type) |
2490 | continue; | |
7c8ff89e DS |
2491 | if (rib->instance != instance) |
2492 | continue; | |
ebf1ead0 | 2493 | if (rib->type == ZEBRA_ROUTE_CONNECT && (nexthop = rib->nexthop) && |
4f1735fd | 2494 | nexthop->type == NEXTHOP_TYPE_IFINDEX) |
718e3744 | 2495 | { |
4f1735fd MF |
2496 | if (nexthop->ifindex != ifindex) |
2497 | continue; | |
ebf1ead0 | 2498 | if (rib->refcnt) |
718e3744 | 2499 | { |
ebf1ead0 | 2500 | rib->refcnt--; |
2501 | route_unlock_node (rn); | |
2502 | route_unlock_node (rn); | |
265d5b9d | 2503 | return; |
718e3744 | 2504 | } |
ebf1ead0 | 2505 | same = rib; |
2506 | break; | |
718e3744 | 2507 | } |
ebf1ead0 | 2508 | /* Make sure that the route found has the same gateway. */ |
fa713d9e | 2509 | else |
5ec90d28 | 2510 | { |
fa713d9e CF |
2511 | if (gate == NULL) |
2512 | { | |
2513 | same = rib; | |
2514 | break; | |
2515 | } | |
2516 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
616368ed DS |
2517 | if (IPV4_ADDR_SAME (&nexthop->gate.ipv4, gate) || |
2518 | IPV6_ADDR_SAME (&nexthop->gate.ipv6, gate)) | |
fa713d9e CF |
2519 | { |
2520 | same = rib; | |
2521 | break; | |
2522 | } | |
2523 | if (same) | |
2524 | break; | |
2525 | } | |
718e3744 | 2526 | } |
718e3744 | 2527 | /* If same type of route can't be found and this message is from |
2528 | kernel. */ | |
2529 | if (! same) | |
2530 | { | |
2037f143 DS |
2531 | if (fib && type == ZEBRA_ROUTE_KERNEL && |
2532 | CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) | |
2533 | { | |
41ec9222 | 2534 | if (IS_ZEBRA_DEBUG_RIB) |
2037f143 | 2535 | { |
05737783 CF |
2536 | rnode_debug (rn, vrf_id, "rn %p, rib %p (type %d) was deleted from kernel, adding", |
2537 | rn, fib, fib->type); | |
2037f143 | 2538 | } |
6baf7bb8 DS |
2539 | if (allow_delete) |
2540 | { | |
2541 | /* Unset flags. */ | |
2542 | for (nexthop = fib->nexthop; nexthop; nexthop = nexthop->next) | |
2543 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2544 | ||
446bb95e | 2545 | UNSET_FLAG (fib->status, RIB_ENTRY_SELECTED_FIB); |
6baf7bb8 DS |
2546 | } |
2547 | else | |
2548 | { | |
2549 | /* This means someone else, other than Zebra, has deleted | |
2550 | * a Zebra router from the kernel. We will add it back */ | |
949ae9ba | 2551 | rib_install_kernel(rn, fib, NULL); |
6baf7bb8 | 2552 | } |
2037f143 | 2553 | } |
718e3744 | 2554 | else |
2555 | { | |
41ec9222 | 2556 | if (IS_ZEBRA_DEBUG_RIB) |
718e3744 | 2557 | { |
2558 | if (gate) | |
05737783 | 2559 | rnode_debug(rn, vrf_id, "via %s ifindex %d type %d " |
78104b9b | 2560 | "doesn't exist in rib", |
05737783 | 2561 | inet_ntop (family2afi(afi), gate, buf2, INET_ADDRSTRLEN), /* FIXME */ |
35d921cc TT |
2562 | ifindex, |
2563 | type); | |
718e3744 | 2564 | else |
05737783 | 2565 | rnode_debug (rn, vrf_id, "ifindex %d type %d doesn't exist in rib", |
35d921cc TT |
2566 | ifindex, |
2567 | type); | |
718e3744 | 2568 | } |
2569 | route_unlock_node (rn); | |
265d5b9d | 2570 | return; |
718e3744 | 2571 | } |
2572 | } | |
4d38fdb4 | 2573 | |
718e3744 | 2574 | if (same) |
4d38fdb4 | 2575 | rib_delnode (rn, same); |
2576 | ||
718e3744 | 2577 | route_unlock_node (rn); |
265d5b9d | 2578 | return; |
718e3744 | 2579 | } |
6b0655a2 | 2580 | |
718e3744 | 2581 | |
718e3744 | 2582 | |
718e3744 | 2583 | int |
3b1098be DS |
2584 | rib_add (afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2585 | u_short instance, int flags, struct prefix *p, | |
3c7c91d0 DL |
2586 | struct prefix_ipv6 *src_p, union g_addr *gate, |
2587 | union g_addr *src, ifindex_t ifindex, | |
3b1098be DS |
2588 | u_int32_t table_id, u_int32_t metric, u_int32_t mtu, |
2589 | u_char distance) | |
718e3744 | 2590 | { |
2591 | struct rib *rib; | |
2592 | struct rib *same = NULL; | |
2593 | struct route_table *table; | |
2594 | struct route_node *rn; | |
2595 | struct nexthop *nexthop; | |
2596 | ||
05737783 CF |
2597 | assert(!src_p || afi == AFI_IP6); |
2598 | ||
718e3744 | 2599 | /* Lookup table. */ |
3b1098be | 2600 | table = zebra_vrf_table_with_table_id (afi, safi, vrf_id, table_id); |
718e3744 | 2601 | if (! table) |
2602 | return 0; | |
2603 | ||
2604 | /* Make sure mask is applied. */ | |
3b1098be | 2605 | apply_mask (p); |
05737783 CF |
2606 | if (src_p) |
2607 | apply_mask_ipv6 (src_p); | |
718e3744 | 2608 | |
2609 | /* Set default distance by route type. */ | |
3b1098be DS |
2610 | if (distance == 0) |
2611 | { | |
2612 | if ((unsigned)type >= array_size(route_info)) | |
2613 | distance = 150; | |
2614 | else | |
2615 | distance = route_info[type].distance; | |
2616 | ||
2617 | /* iBGP distance is 200. */ | |
2618 | if (type == ZEBRA_ROUTE_BGP && CHECK_FLAG (flags, ZEBRA_FLAG_IBGP)) | |
2619 | distance = 200; | |
2620 | } | |
718e3744 | 2621 | |
718e3744 | 2622 | /* Lookup route node.*/ |
05737783 | 2623 | rn = srcdest_rnode_get (table, p, src_p); |
718e3744 | 2624 | |
2625 | /* If same type of route are installed, treat it as a implicit | |
2626 | withdraw. */ | |
9fd92e3c | 2627 | RNODE_FOREACH_RIB (rn, rib) |
718e3744 | 2628 | { |
6d691129 PJ |
2629 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2630 | continue; | |
2631 | ||
ebf1ead0 | 2632 | if (rib->type != type) |
2633 | continue; | |
7c8ff89e DS |
2634 | if (rib->instance != instance) |
2635 | continue; | |
ebf1ead0 | 2636 | if (rib->type != ZEBRA_ROUTE_CONNECT) |
718e3744 | 2637 | { |
2638 | same = rib; | |
718e3744 | 2639 | break; |
2640 | } | |
3b1098be | 2641 | /* Duplicate connected route comes in. */ |
ebf1ead0 | 2642 | else if ((nexthop = rib->nexthop) && |
2643 | nexthop->type == NEXTHOP_TYPE_IFINDEX && | |
3b1098be DS |
2644 | nexthop->ifindex == ifindex && |
2645 | !CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) | |
ebf1ead0 | 2646 | { |
2647 | rib->refcnt++; | |
3b1098be | 2648 | return 0 ; |
ebf1ead0 | 2649 | } |
718e3744 | 2650 | } |
2651 | ||
2652 | /* Allocate new rib structure. */ | |
4d38fdb4 | 2653 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); |
2654 | ||
718e3744 | 2655 | rib->type = type; |
7c8ff89e | 2656 | rib->instance = instance; |
718e3744 | 2657 | rib->distance = distance; |
2658 | rib->flags = flags; | |
2659 | rib->metric = metric; | |
c50ca33a | 2660 | rib->mtu = mtu; |
7a4bb9c5 | 2661 | rib->table = table_id; |
78104b9b | 2662 | rib->vrf_id = vrf_id; |
718e3744 | 2663 | rib->nexthop_num = 0; |
2664 | rib->uptime = time (NULL); | |
2665 | ||
2666 | /* Nexthop settings. */ | |
2667 | if (gate) | |
2668 | { | |
3b1098be DS |
2669 | if (afi == AFI_IP6) |
2670 | { | |
2671 | if (ifindex) | |
2672 | rib_nexthop_ipv6_ifindex_add (rib, &gate->ipv6, ifindex); | |
2673 | else | |
2674 | rib_nexthop_ipv6_add (rib, &gate->ipv6); | |
2675 | } | |
718e3744 | 2676 | else |
3b1098be DS |
2677 | { |
2678 | if (ifindex) | |
2679 | rib_nexthop_ipv4_ifindex_add (rib, &gate->ipv4, &src->ipv4, ifindex); | |
2680 | else | |
2681 | rib_nexthop_ipv4_add (rib, &gate->ipv4, &src->ipv4); | |
2682 | } | |
718e3744 | 2683 | } |
2684 | else | |
a399694f | 2685 | rib_nexthop_ifindex_add (rib, ifindex); |
718e3744 | 2686 | |
2687 | /* If this route is kernel route, set FIB flag to the route. */ | |
2688 | if (type == ZEBRA_ROUTE_KERNEL || type == ZEBRA_ROUTE_CONNECT) | |
2689 | for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next) | |
2690 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
2691 | ||
2692 | /* Link new rib to node.*/ | |
fed643f4 | 2693 | if (IS_ZEBRA_DEBUG_RIB) |
41ec9222 | 2694 | { |
05737783 CF |
2695 | rnode_debug (rn, vrf_id, "Inserting route rn %p, rib %p (type %d) existing %p", |
2696 | (void *)rn, (void *)rib, rib->type, (void *)same); | |
41ec9222 | 2697 | |
2698 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
05737783 | 2699 | rib_dump (p, src_p, rib); |
41ec9222 | 2700 | } |
2bf26d41 | 2701 | rib_addnode (rn, rib, 1); |
718e3744 | 2702 | |
718e3744 | 2703 | /* Free implicit route.*/ |
2704 | if (same) | |
4d38fdb4 | 2705 | rib_delnode (rn, same); |
2706 | ||
2707 | route_unlock_node (rn); | |
718e3744 | 2708 | return 0; |
2709 | } | |
2710 | ||
1c848137 | 2711 | /* Schedule routes of a particular table (address-family) based on event. */ |
2712 | static void | |
2713 | rib_update_table (struct route_table *table, rib_update_event_t event) | |
b84c7253 | 2714 | { |
2715 | struct route_node *rn; | |
b84c7253 | 2716 | struct rib *rib, *next; |
2717 | ||
1c848137 | 2718 | /* Walk all routes and queue for processing, if appropriate for |
2719 | * the trigger event. | |
2720 | */ | |
05737783 | 2721 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
1c848137 | 2722 | { |
2723 | switch (event) | |
2724 | { | |
2725 | case RIB_UPDATE_IF_CHANGE: | |
2726 | /* Examine all routes that won't get processed by the protocol or | |
2727 | * triggered by nexthop evaluation (NHT). This would be system, | |
2728 | * kernel and certain static routes. Note that NHT will get | |
2729 | * triggered upon an interface event as connected routes always | |
2730 | * get queued for processing. | |
2731 | */ | |
2732 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) | |
2733 | { | |
2734 | if (rib->type == ZEBRA_ROUTE_OSPF || | |
2735 | rib->type == ZEBRA_ROUTE_OSPF6 || | |
2736 | rib->type == ZEBRA_ROUTE_BGP) | |
2737 | continue; /* protocol will handle. */ | |
2738 | else if (rib->type == ZEBRA_ROUTE_STATIC) | |
2739 | { | |
2740 | struct nexthop *nh; | |
2741 | for (nh = rib->nexthop; nh; nh = nh->next) | |
2742 | if (!(nh->type == NEXTHOP_TYPE_IPV4 || | |
2743 | nh->type == NEXTHOP_TYPE_IPV6)) | |
2744 | break; | |
2745 | ||
2746 | /* If we only have nexthops to a gateway, NHT will | |
2747 | * take care. | |
2748 | */ | |
2749 | if (nh) | |
44e9909d | 2750 | rib_queue_add (rn); |
1c848137 | 2751 | } |
2752 | else | |
44e9909d | 2753 | rib_queue_add (rn); |
1c848137 | 2754 | } |
2755 | break; | |
b84c7253 | 2756 | |
1c848137 | 2757 | case RIB_UPDATE_RMAP_CHANGE: |
2758 | case RIB_UPDATE_OTHER: | |
2759 | /* Right now, examine all routes. Can restrict to a protocol in | |
2760 | * some cases (TODO). | |
2761 | */ | |
2762 | if (rnode_to_ribs (rn)) | |
44e9909d | 2763 | rib_queue_add (rn); |
1c848137 | 2764 | break; |
2765 | ||
2766 | default: | |
2767 | break; | |
2768 | } | |
2769 | } | |
b84c7253 | 2770 | } |
2771 | ||
718e3744 | 2772 | /* RIB update function. */ |
2773 | void | |
1c848137 | 2774 | rib_update (vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 2775 | { |
718e3744 | 2776 | struct route_table *table; |
1c848137 | 2777 | |
2778 | /* Process routes of interested address-families. */ | |
78104b9b | 2779 | table = zebra_vrf_table (AFI_IP, SAFI_UNICAST, vrf_id); |
718e3744 | 2780 | if (table) |
1c848137 | 2781 | rib_update_table (table, event); |
718e3744 | 2782 | |
78104b9b | 2783 | table = zebra_vrf_table (AFI_IP6, SAFI_UNICAST, vrf_id); |
718e3744 | 2784 | if (table) |
1c848137 | 2785 | rib_update_table (table, event); |
718e3744 | 2786 | } |
2787 | ||
718e3744 | 2788 | /* Remove all routes which comes from non main table. */ |
a1ac18c4 | 2789 | static void |
718e3744 | 2790 | rib_weed_table (struct route_table *table) |
2791 | { | |
2792 | struct route_node *rn; | |
2793 | struct rib *rib; | |
2794 | struct rib *next; | |
2795 | ||
2796 | if (table) | |
05737783 | 2797 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2798 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 2799 | { |
6d691129 PJ |
2800 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2801 | continue; | |
2802 | ||
b21b19c5 | 2803 | if (rib->table != zebrad.rtm_table_default && |
718e3744 | 2804 | rib->table != RT_TABLE_MAIN) |
4d38fdb4 | 2805 | rib_delnode (rn, rib); |
718e3744 | 2806 | } |
2807 | } | |
2808 | ||
2809 | /* Delete all routes from non main table. */ | |
2810 | void | |
a1ac18c4 | 2811 | rib_weed_tables (void) |
718e3744 | 2812 | { |
1a1a7065 | 2813 | struct vrf *vrf; |
78104b9b FL |
2814 | struct zebra_vrf *zvrf; |
2815 | ||
1a1a7065 RW |
2816 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2817 | if ((zvrf = vrf->info) != NULL) | |
78104b9b FL |
2818 | { |
2819 | rib_weed_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
2820 | rib_weed_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2821 | } | |
718e3744 | 2822 | } |
6b0655a2 | 2823 | |
718e3744 | 2824 | /* Delete self installed routes after zebra is relaunched. */ |
a1ac18c4 | 2825 | static void |
718e3744 | 2826 | rib_sweep_table (struct route_table *table) |
2827 | { | |
2828 | struct route_node *rn; | |
2829 | struct rib *rib; | |
2830 | struct rib *next; | |
2831 | int ret = 0; | |
2832 | ||
2833 | if (table) | |
05737783 | 2834 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2835 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
718e3744 | 2836 | { |
6d691129 PJ |
2837 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2838 | continue; | |
2839 | ||
718e3744 | 2840 | if (rib->type == ZEBRA_ROUTE_KERNEL && |
2841 | CHECK_FLAG (rib->flags, ZEBRA_FLAG_SELFROUTE)) | |
2842 | { | |
2843 | ret = rib_uninstall_kernel (rn, rib); | |
2844 | if (! ret) | |
4d38fdb4 | 2845 | rib_delnode (rn, rib); |
718e3744 | 2846 | } |
2847 | } | |
2848 | } | |
2849 | ||
2850 | /* Sweep all RIB tables. */ | |
2851 | void | |
a1ac18c4 | 2852 | rib_sweep_route (void) |
718e3744 | 2853 | { |
1a1a7065 | 2854 | struct vrf *vrf; |
78104b9b FL |
2855 | struct zebra_vrf *zvrf; |
2856 | ||
1a1a7065 RW |
2857 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2858 | if ((zvrf = vrf->info) != NULL) | |
78104b9b FL |
2859 | { |
2860 | rib_sweep_table (zvrf->table[AFI_IP][SAFI_UNICAST]); | |
2861 | rib_sweep_table (zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2862 | } | |
718e3744 | 2863 | } |
2ea1ab1c VT |
2864 | |
2865 | /* Remove specific by protocol routes from 'table'. */ | |
2866 | static unsigned long | |
7c8ff89e | 2867 | rib_score_proto_table (u_char proto, u_short instance, struct route_table *table) |
2ea1ab1c VT |
2868 | { |
2869 | struct route_node *rn; | |
2870 | struct rib *rib; | |
2871 | struct rib *next; | |
2872 | unsigned long n = 0; | |
2873 | ||
2874 | if (table) | |
05737783 | 2875 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2876 | RNODE_FOREACH_RIB_SAFE (rn, rib, next) |
2ea1ab1c | 2877 | { |
2ea1ab1c VT |
2878 | if (CHECK_FLAG (rib->status, RIB_ENTRY_REMOVED)) |
2879 | continue; | |
7c8ff89e | 2880 | if (rib->type == proto && rib->instance == instance) |
2ea1ab1c VT |
2881 | { |
2882 | rib_delnode (rn, rib); | |
2883 | n++; | |
2884 | } | |
2885 | } | |
2ea1ab1c VT |
2886 | return n; |
2887 | } | |
2888 | ||
2889 | /* Remove specific by protocol routes. */ | |
2890 | unsigned long | |
7c8ff89e | 2891 | rib_score_proto (u_char proto, u_short instance) |
2ea1ab1c | 2892 | { |
1a1a7065 | 2893 | struct vrf *vrf; |
78104b9b FL |
2894 | struct zebra_vrf *zvrf; |
2895 | unsigned long cnt = 0; | |
2896 | ||
1a1a7065 RW |
2897 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2898 | if ((zvrf = vrf->info) != NULL) | |
78104b9b FL |
2899 | cnt += rib_score_proto_table (proto, instance, zvrf->table[AFI_IP][SAFI_UNICAST]) |
2900 | +rib_score_proto_table (proto, instance, zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2901 | ||
2902 | return cnt; | |
2ea1ab1c VT |
2903 | } |
2904 | ||
718e3744 | 2905 | /* Close RIB and clean up kernel routes. */ |
a31c5886 | 2906 | void |
718e3744 | 2907 | rib_close_table (struct route_table *table) |
2908 | { | |
2909 | struct route_node *rn; | |
416ec78d | 2910 | rib_table_info_t *info = table->info; |
718e3744 | 2911 | struct rib *rib; |
2912 | ||
2913 | if (table) | |
05737783 | 2914 | for (rn = route_top (table); rn; rn = srcdest_route_next (rn)) |
9fd92e3c | 2915 | RNODE_FOREACH_RIB (rn, rib) |
6d691129 | 2916 | { |
446bb95e | 2917 | if (!CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
9fd92e3c AS |
2918 | continue; |
2919 | ||
416ec78d | 2920 | if (info->safi == SAFI_UNICAST) |
4f8ea50c | 2921 | hook_call(rib_update, rn, NULL); |
5adc2528 | 2922 | |
9fd92e3c AS |
2923 | if (! RIB_SYSTEM_ROUTE (rib)) |
2924 | rib_uninstall_kernel (rn, rib); | |
6d691129 | 2925 | } |
718e3744 | 2926 | } |
2927 | ||
718e3744 | 2928 | /* Routing information base initialize. */ |
2929 | void | |
a1ac18c4 | 2930 | rib_init (void) |
718e3744 | 2931 | { |
4d38fdb4 | 2932 | rib_queue_init (&zebrad); |
718e3744 | 2933 | } |
0915bb0c AS |
2934 | |
2935 | /* | |
2936 | * vrf_id_get_next | |
2937 | * | |
2938 | * Get the first vrf id that is greater than the given vrf id if any. | |
2939 | * | |
2940 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
2941 | */ | |
2942 | static inline int | |
b72ede27 | 2943 | vrf_id_get_next (vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 2944 | { |
1a1a7065 | 2945 | struct vrf *vrf; |
b72ede27 | 2946 | |
5f3d1bdf | 2947 | vrf = vrf_lookup_by_id (vrf_id); |
1a1a7065 | 2948 | if (vrf) |
0915bb0c | 2949 | { |
1a1a7065 RW |
2950 | vrf = RB_NEXT (vrf_id_head, &vrfs_by_id, vrf); |
2951 | if (vrf) { | |
2952 | *next_id_p = vrf->vrf_id; | |
2953 | return 1; | |
2954 | } | |
0915bb0c AS |
2955 | } |
2956 | ||
2957 | return 0; | |
2958 | } | |
2959 | ||
2960 | /* | |
2961 | * rib_tables_iter_next | |
2962 | * | |
2963 | * Returns the next table in the iteration. | |
2964 | */ | |
2965 | struct route_table * | |
2966 | rib_tables_iter_next (rib_tables_iter_t *iter) | |
2967 | { | |
2968 | struct route_table *table; | |
2969 | ||
2970 | /* | |
2971 | * Array that helps us go over all AFI/SAFI combinations via one | |
2972 | * index. | |
2973 | */ | |
2974 | static struct { | |
2975 | afi_t afi; | |
2976 | safi_t safi; | |
2977 | } afi_safis[] = { | |
2978 | { AFI_IP, SAFI_UNICAST }, | |
2979 | { AFI_IP, SAFI_MULTICAST }, | |
a64448ba | 2980 | { AFI_IP, SAFI_LABELED_UNICAST }, |
0915bb0c AS |
2981 | { AFI_IP6, SAFI_UNICAST }, |
2982 | { AFI_IP6, SAFI_MULTICAST }, | |
a64448ba | 2983 | { AFI_IP6, SAFI_LABELED_UNICAST }, |
0915bb0c AS |
2984 | }; |
2985 | ||
2986 | table = NULL; | |
2987 | ||
2988 | switch (iter->state) | |
2989 | { | |
2990 | ||
2991 | case RIB_TABLES_ITER_S_INIT: | |
9c2bf1cf | 2992 | iter->vrf_id = VRF_DEFAULT; |
0915bb0c AS |
2993 | iter->afi_safi_ix = -1; |
2994 | ||
2995 | /* Fall through */ | |
2996 | ||
2997 | case RIB_TABLES_ITER_S_ITERATING: | |
2998 | iter->afi_safi_ix++; | |
2999 | while (1) | |
3000 | { | |
3001 | ||
3002 | while (iter->afi_safi_ix < (int) ZEBRA_NUM_OF (afi_safis)) | |
3003 | { | |
b72ede27 | 3004 | table = zebra_vrf_table (afi_safis[iter->afi_safi_ix].afi, |
0915bb0c AS |
3005 | afi_safis[iter->afi_safi_ix].safi, |
3006 | iter->vrf_id); | |
3007 | if (table) | |
3008 | break; | |
3009 | ||
3010 | iter->afi_safi_ix++; | |
3011 | } | |
3012 | ||
3013 | /* | |
3014 | * Found another table in this vrf. | |
3015 | */ | |
3016 | if (table) | |
3017 | break; | |
3018 | ||
3019 | /* | |
3020 | * Done with all tables in the current vrf, go to the next | |
3021 | * one. | |
3022 | */ | |
3023 | if (!vrf_id_get_next (iter->vrf_id, &iter->vrf_id)) | |
3024 | break; | |
3025 | ||
3026 | iter->afi_safi_ix = 0; | |
3027 | } | |
3028 | ||
3029 | break; | |
3030 | ||
3031 | case RIB_TABLES_ITER_S_DONE: | |
3032 | return NULL; | |
3033 | } | |
3034 | ||
3035 | if (table) | |
3036 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3037 | else | |
3038 | iter->state = RIB_TABLES_ITER_S_DONE; | |
3039 | ||
3040 | return table; | |
3041 | } | |
b72ede27 | 3042 |