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28f6dde8 DS |
1 | /* |
2 | * Static Routing Information code | |
3 | * Copyright (C) 2016 Cumulus Networks | |
4 | * Donald Sharp | |
5 | * | |
6 | * This file is part of Quagga. | |
7 | * | |
8 | * Quagga is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * Quagga is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
896014f4 DL |
18 | * You should have received a copy of the GNU General Public License along |
19 | * with this program; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
28f6dde8 DS |
21 | */ |
22 | #include <zebra.h> | |
23 | ||
24 | #include <lib/nexthop.h> | |
25 | #include <lib/memory.h> | |
c423229b | 26 | #include <lib/srcdest_table.h> |
c3c04063 | 27 | #include <lib/if.h> |
28f6dde8 | 28 | |
82f97584 | 29 | #include "vty.h" |
28f6dde8 DS |
30 | #include "zebra/debug.h" |
31 | #include "zebra/rib.h" | |
32 | #include "zebra/zserv.h" | |
33 | #include "zebra/zebra_vrf.h" | |
34 | #include "zebra/zebra_static.h" | |
35 | #include "zebra/zebra_rnh.h" | |
36 | #include "zebra/redistribute.h" | |
4a1ab8e4 | 37 | #include "zebra/zebra_memory.h" |
28f6dde8 DS |
38 | |
39 | /* Install static route into rib. */ | |
d62a17ae | 40 | void static_install_route(afi_t afi, safi_t safi, struct prefix *p, |
41 | struct prefix_ipv6 *src_p, struct static_route *si) | |
28f6dde8 | 42 | { |
d62a17ae | 43 | struct route_entry *re; |
44 | struct route_node *rn; | |
45 | struct route_table *table; | |
46 | struct prefix nh_p; | |
47 | struct nexthop *nexthop = NULL; | |
48 | ||
49 | /* Lookup table. */ | |
50 | table = zebra_vrf_table(afi, safi, si->vrf_id); | |
51 | if (!table) | |
52 | return; | |
53 | ||
54 | memset(&nh_p, 0, sizeof(nh_p)); | |
55 | ||
56 | /* Lookup existing route */ | |
57 | rn = srcdest_rnode_get(table, p, src_p); | |
58 | RNODE_FOREACH_RE(rn, re) | |
59 | { | |
60 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
61 | continue; | |
62 | ||
63 | if (re->type == ZEBRA_ROUTE_STATIC | |
64 | && re->distance == si->distance) | |
65 | break; | |
66 | } | |
67 | ||
68 | if (re) { | |
69 | /* if tag value changed , update old value in RIB */ | |
70 | if (re->tag != si->tag) | |
71 | re->tag = si->tag; | |
72 | ||
73 | /* Same distance static route is there. Update it with new | |
74 | nexthop. */ | |
75 | route_unlock_node(rn); | |
76 | switch (si->type) { | |
77 | case STATIC_IPV4_GATEWAY: | |
78 | nexthop = route_entry_nexthop_ipv4_add( | |
79 | re, &si->addr.ipv4, NULL); | |
80 | nh_p.family = AF_INET; | |
81 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
82 | nh_p.u.prefix4 = si->addr.ipv4; | |
83 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); | |
84 | break; | |
23443030 | 85 | case STATIC_IPV4_GATEWAY_IFNAME: |
599186ad RW |
86 | nexthop = route_entry_nexthop_ipv4_ifindex_add( |
87 | re, &si->addr.ipv4, NULL, si->ifindex); | |
88 | break; | |
23443030 | 89 | case STATIC_IFNAME: |
d62a17ae | 90 | nexthop = route_entry_nexthop_ifindex_add(re, |
91 | si->ifindex); | |
92 | break; | |
93 | case STATIC_BLACKHOLE: | |
94 | nexthop = route_entry_nexthop_blackhole_add(re); | |
95 | break; | |
96 | case STATIC_IPV6_GATEWAY: | |
97 | nexthop = route_entry_nexthop_ipv6_add(re, | |
98 | &si->addr.ipv6); | |
99 | nh_p.family = AF_INET6; | |
100 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
101 | nh_p.u.prefix6 = si->addr.ipv6; | |
102 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); | |
103 | break; | |
23443030 | 104 | case STATIC_IPV6_GATEWAY_IFNAME: |
d62a17ae | 105 | nexthop = route_entry_nexthop_ipv6_ifindex_add( |
106 | re, &si->addr.ipv6, si->ifindex); | |
107 | break; | |
108 | } | |
109 | /* Update label(s), if present. */ | |
110 | if (si->snh_label.num_labels) | |
111 | nexthop_add_labels(nexthop, ZEBRA_LSP_STATIC, | |
112 | si->snh_label.num_labels, | |
113 | &si->snh_label.label[0]); | |
114 | ||
115 | if (IS_ZEBRA_DEBUG_RIB) { | |
116 | char buf[INET6_ADDRSTRLEN]; | |
117 | if (IS_ZEBRA_DEBUG_RIB) { | |
118 | inet_ntop(p->family, &p->u.prefix, buf, | |
119 | INET6_ADDRSTRLEN); | |
120 | zlog_debug( | |
121 | "%u:%s/%d: Modifying route rn %p, re %p (type %d)", | |
122 | si->vrf_id, buf, p->prefixlen, rn, re, | |
123 | re->type); | |
124 | } | |
125 | } | |
126 | /* Schedule route for processing or invoke NHT, as appropriate. | |
127 | */ | |
128 | if (si->type == STATIC_IPV4_GATEWAY | |
129 | || si->type == STATIC_IPV6_GATEWAY) | |
130 | zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, | |
131 | RNH_NEXTHOP_TYPE, &nh_p); | |
132 | else | |
133 | rib_queue_add(rn); | |
134 | } else { | |
135 | /* This is new static route. */ | |
136 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
137 | ||
138 | re->type = ZEBRA_ROUTE_STATIC; | |
139 | re->instance = 0; | |
140 | re->distance = si->distance; | |
141 | re->metric = 0; | |
142 | re->mtu = 0; | |
143 | re->vrf_id = si->vrf_id; | |
144 | re->table = | |
145 | si->vrf_id | |
146 | ? (zebra_vrf_lookup_by_id(si->vrf_id))->table_id | |
147 | : zebrad.rtm_table_default; | |
148 | re->nexthop_num = 0; | |
149 | re->tag = si->tag; | |
150 | ||
151 | switch (si->type) { | |
152 | case STATIC_IPV4_GATEWAY: | |
153 | nexthop = route_entry_nexthop_ipv4_add( | |
154 | re, &si->addr.ipv4, NULL); | |
155 | nh_p.family = AF_INET; | |
156 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
157 | nh_p.u.prefix4 = si->addr.ipv4; | |
158 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); | |
159 | break; | |
23443030 | 160 | case STATIC_IPV4_GATEWAY_IFNAME: |
599186ad RW |
161 | nexthop = route_entry_nexthop_ipv4_ifindex_add( |
162 | re, &si->addr.ipv4, NULL, si->ifindex); | |
163 | break; | |
23443030 | 164 | case STATIC_IFNAME: |
d62a17ae | 165 | nexthop = route_entry_nexthop_ifindex_add(re, |
166 | si->ifindex); | |
167 | break; | |
168 | case STATIC_BLACKHOLE: | |
169 | nexthop = route_entry_nexthop_blackhole_add(re); | |
170 | break; | |
171 | case STATIC_IPV6_GATEWAY: | |
172 | nexthop = route_entry_nexthop_ipv6_add(re, | |
173 | &si->addr.ipv6); | |
174 | nh_p.family = AF_INET6; | |
175 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
176 | nh_p.u.prefix6 = si->addr.ipv6; | |
177 | zebra_register_rnh_static_nh(si->vrf_id, &nh_p, rn); | |
178 | break; | |
23443030 | 179 | case STATIC_IPV6_GATEWAY_IFNAME: |
d62a17ae | 180 | nexthop = route_entry_nexthop_ipv6_ifindex_add( |
181 | re, &si->addr.ipv6, si->ifindex); | |
182 | break; | |
183 | } | |
184 | /* Update label(s), if present. */ | |
185 | if (si->snh_label.num_labels) | |
186 | nexthop_add_labels(nexthop, ZEBRA_LSP_STATIC, | |
187 | si->snh_label.num_labels, | |
188 | &si->snh_label.label[0]); | |
189 | ||
190 | /* Save the flags of this static routes (reject, blackhole) */ | |
191 | re->flags = si->flags; | |
192 | ||
193 | if (IS_ZEBRA_DEBUG_RIB) { | |
194 | char buf[INET6_ADDRSTRLEN]; | |
195 | if (IS_ZEBRA_DEBUG_RIB) { | |
196 | inet_ntop(p->family, &p->u.prefix, buf, | |
197 | INET6_ADDRSTRLEN); | |
198 | zlog_debug( | |
199 | "%u:%s/%d: Inserting route rn %p, re %p (type %d)", | |
200 | si->vrf_id, buf, p->prefixlen, rn, re, | |
201 | re->type); | |
202 | } | |
203 | } | |
204 | /* Link this re to the tree. Schedule for processing or invoke | |
205 | * NHT, | |
206 | * as appropriate. | |
207 | */ | |
208 | if (si->type == STATIC_IPV4_GATEWAY | |
209 | || si->type == STATIC_IPV6_GATEWAY) { | |
210 | rib_addnode(rn, re, 0); | |
211 | zebra_evaluate_rnh(si->vrf_id, nh_p.family, 1, | |
212 | RNH_NEXTHOP_TYPE, &nh_p); | |
213 | } else | |
214 | rib_addnode(rn, re, 1); | |
215 | } | |
28f6dde8 | 216 | } |
a22f3f5d | 217 | |
c3c04063 DL |
218 | /* this works correctly with IFNAME<>IFINDEX because a static route on a |
219 | * non-active interface will have IFINDEX_INTERNAL and thus compare false | |
220 | */ | |
d62a17ae | 221 | static int static_nexthop_same(struct nexthop *nexthop, struct static_route *si) |
28f6dde8 | 222 | { |
d62a17ae | 223 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE |
224 | && si->type == STATIC_BLACKHOLE) | |
225 | return 1; | |
226 | ||
227 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
228 | && si->type == STATIC_IPV4_GATEWAY | |
229 | && IPV4_ADDR_SAME(&nexthop->gate.ipv4, &si->addr.ipv4)) | |
230 | return 1; | |
599186ad | 231 | else if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX |
23443030 | 232 | && si->type == STATIC_IPV4_GATEWAY_IFNAME |
599186ad RW |
233 | && IPV4_ADDR_SAME(&nexthop->gate.ipv4, &si->addr.ipv4) |
234 | && nexthop->ifindex == si->ifindex) | |
235 | return 1; | |
d62a17ae | 236 | else if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
23443030 | 237 | && si->type == STATIC_IFNAME |
d62a17ae | 238 | && nexthop->ifindex == si->ifindex) |
239 | return 1; | |
240 | else if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
241 | && si->type == STATIC_IPV6_GATEWAY | |
242 | && IPV6_ADDR_SAME(&nexthop->gate.ipv6, &si->addr.ipv6)) | |
243 | return 1; | |
244 | else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
23443030 | 245 | && si->type == STATIC_IPV6_GATEWAY_IFNAME |
d62a17ae | 246 | && IPV6_ADDR_SAME(&nexthop->gate.ipv6, &si->addr.ipv6) |
247 | && nexthop->ifindex == si->ifindex) | |
248 | return 1; | |
249 | ||
250 | return 0; | |
28f6dde8 DS |
251 | } |
252 | ||
253 | /* Uninstall static route from RIB. */ | |
d62a17ae | 254 | void static_uninstall_route(afi_t afi, safi_t safi, struct prefix *p, |
255 | struct prefix_ipv6 *src_p, struct static_route *si) | |
28f6dde8 | 256 | { |
d62a17ae | 257 | struct route_node *rn; |
258 | struct route_entry *re; | |
259 | struct nexthop *nexthop; | |
260 | struct route_table *table; | |
261 | struct prefix nh_p; | |
262 | ||
263 | /* Lookup table. */ | |
264 | table = zebra_vrf_table(afi, safi, si->vrf_id); | |
265 | if (!table) | |
266 | return; | |
267 | ||
268 | /* Lookup existing route with type and distance. */ | |
269 | rn = srcdest_rnode_lookup(table, p, src_p); | |
270 | if (!rn) | |
271 | return; | |
272 | ||
273 | RNODE_FOREACH_RE(rn, re) | |
28f6dde8 | 274 | { |
d62a17ae | 275 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
276 | continue; | |
277 | ||
278 | if (re->type == ZEBRA_ROUTE_STATIC | |
279 | && re->distance == si->distance && re->tag == si->tag) | |
280 | break; | |
28f6dde8 | 281 | } |
d62a17ae | 282 | |
283 | if (!re) { | |
284 | route_unlock_node(rn); | |
285 | return; | |
28f6dde8 | 286 | } |
28f6dde8 | 287 | |
d62a17ae | 288 | /* Lookup nexthop. */ |
289 | for (nexthop = re->nexthop; nexthop; nexthop = nexthop->next) | |
290 | if (static_nexthop_same(nexthop, si)) | |
291 | break; | |
292 | ||
293 | /* Can't find nexthop. */ | |
294 | if (!nexthop) { | |
295 | route_unlock_node(rn); | |
296 | return; | |
28f6dde8 | 297 | } |
d62a17ae | 298 | |
299 | /* Check nexthop. */ | |
300 | if (re->nexthop_num == 1) | |
301 | rib_delnode(rn, re); | |
302 | else { | |
303 | /* Mark this nexthop as inactive and reinstall the route. Then, | |
304 | * delete | |
305 | * the nexthop. There is no need to re-evaluate the route for | |
306 | * this | |
307 | * scenario. | |
308 | */ | |
309 | if (IS_ZEBRA_DEBUG_RIB) { | |
310 | char buf[INET6_ADDRSTRLEN]; | |
311 | if (IS_ZEBRA_DEBUG_RIB) { | |
312 | inet_ntop(p->family, &p->u.prefix, buf, | |
313 | INET6_ADDRSTRLEN); | |
314 | zlog_debug( | |
315 | "%u:%s/%d: Modifying route rn %p, re %p (type %d)", | |
316 | si->vrf_id, buf, p->prefixlen, rn, re, | |
317 | re->type); | |
318 | } | |
319 | } | |
320 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
321 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
322 | /* If there are other active nexthops, do an update. */ | |
323 | if (re->nexthop_active_num > 1) { | |
324 | /* Update route in kernel if it's in fib */ | |
325 | if (CHECK_FLAG(re->status, | |
326 | ROUTE_ENTRY_SELECTED_FIB)) | |
327 | rib_install_kernel(rn, re, re); | |
328 | /* Update redistribution if it's selected */ | |
329 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) | |
330 | redistribute_update( | |
331 | p, (struct prefix *)src_p, re, | |
332 | NULL); | |
333 | } else { | |
334 | /* Remove from redistribute if selected route | |
335 | * becomes inactive */ | |
336 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) | |
337 | redistribute_delete( | |
338 | p, (struct prefix *)src_p, re); | |
339 | /* Remove from kernel if fib route becomes | |
340 | * inactive */ | |
341 | if (CHECK_FLAG(re->status, | |
342 | ROUTE_ENTRY_SELECTED_FIB)) | |
343 | rib_uninstall_kernel(rn, re); | |
344 | } | |
345 | } | |
346 | ||
347 | if (afi == AFI_IP) { | |
348 | /* Delete the nexthop and dereg from NHT */ | |
349 | nh_p.family = AF_INET; | |
350 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
351 | nh_p.u.prefix4 = nexthop->gate.ipv4; | |
352 | } else { | |
353 | nh_p.family = AF_INET6; | |
354 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
355 | nh_p.u.prefix6 = nexthop->gate.ipv6; | |
356 | } | |
357 | route_entry_nexthop_delete(re, nexthop); | |
358 | zebra_deregister_rnh_static_nh(si->vrf_id, &nh_p, rn); | |
359 | nexthop_free(nexthop); | |
28f6dde8 | 360 | } |
d62a17ae | 361 | /* Unlock node. */ |
362 | route_unlock_node(rn); | |
28f6dde8 DS |
363 | } |
364 | ||
d62a17ae | 365 | int static_add_route(afi_t afi, safi_t safi, u_char type, struct prefix *p, |
366 | struct prefix_ipv6 *src_p, union g_addr *gate, | |
c3c04063 | 367 | const char *ifname, u_char flags, |
dc9ffce8 | 368 | route_tag_t tag, u_char distance, struct zebra_vrf *zvrf, |
a22f3f5d | 369 | struct static_nh_label *snh_label) |
28f6dde8 | 370 | { |
d62a17ae | 371 | struct route_node *rn; |
372 | struct static_route *si; | |
373 | struct static_route *pp; | |
374 | struct static_route *cp; | |
375 | struct static_route *update = NULL; | |
376 | struct route_table *stable = zvrf->stable[afi][safi]; | |
377 | ||
378 | if (!stable) | |
379 | return -1; | |
380 | ||
599186ad RW |
381 | if (!gate |
382 | && (type == STATIC_IPV4_GATEWAY | |
23443030 | 383 | || type == STATIC_IPV4_GATEWAY_IFNAME |
599186ad | 384 | || type == STATIC_IPV6_GATEWAY |
23443030 | 385 | || type == STATIC_IPV6_GATEWAY_IFNAME)) |
d62a17ae | 386 | return -1; |
387 | ||
c3c04063 | 388 | if (!ifname |
23443030 DL |
389 | && (type == STATIC_IFNAME |
390 | || type == STATIC_IPV4_GATEWAY_IFNAME | |
391 | || type == STATIC_IPV6_GATEWAY_IFNAME)) | |
d62a17ae | 392 | return -1; |
393 | ||
394 | /* Lookup static route prefix. */ | |
395 | rn = srcdest_rnode_get(stable, p, src_p); | |
396 | ||
397 | /* Do nothing if there is a same static route. */ | |
398 | for (si = rn->info; si; si = si->next) { | |
399 | if (type == si->type | |
9d303b37 | 400 | && (!gate || ((afi == AFI_IP |
19aad877 | 401 | && IPV4_ADDR_SAME(&gate->ipv4, &si->addr.ipv4)) |
9d303b37 DL |
402 | || (afi == AFI_IP6 |
403 | && IPV6_ADDR_SAME(gate, &si->addr.ipv6)))) | |
c3c04063 | 404 | && (!strcmp (ifname ? ifname : "", si->ifname))) { |
d62a17ae | 405 | if ((distance == si->distance) && (tag == si->tag) |
406 | && !memcmp(&si->snh_label, snh_label, | |
407 | sizeof(struct static_nh_label)) | |
408 | && si->flags == flags) { | |
409 | route_unlock_node(rn); | |
410 | return 0; | |
411 | } else | |
412 | update = si; | |
413 | } | |
414 | } | |
415 | ||
416 | /* Distance or tag or label changed, delete existing first. */ | |
417 | if (update) | |
c3c04063 | 418 | static_delete_route(afi, safi, type, p, src_p, gate, ifname, |
d62a17ae | 419 | update->tag, update->distance, zvrf, |
420 | &update->snh_label); | |
421 | ||
422 | /* Make new static route structure. */ | |
423 | si = XCALLOC(MTYPE_STATIC_ROUTE, sizeof(struct static_route)); | |
424 | ||
425 | si->type = type; | |
426 | si->distance = distance; | |
427 | si->flags = flags; | |
428 | si->tag = tag; | |
429 | si->vrf_id = zvrf_id(zvrf); | |
c3c04063 DL |
430 | if (ifname) |
431 | strlcpy(si->ifname, ifname, sizeof(si->ifname)); | |
432 | si->ifindex = IFINDEX_INTERNAL; | |
d62a17ae | 433 | |
434 | switch (type) { | |
435 | case STATIC_IPV4_GATEWAY: | |
23443030 | 436 | case STATIC_IPV4_GATEWAY_IFNAME: |
d62a17ae | 437 | si->addr.ipv4 = gate->ipv4; |
438 | break; | |
439 | case STATIC_IPV6_GATEWAY: | |
23443030 | 440 | case STATIC_IPV6_GATEWAY_IFNAME: |
d62a17ae | 441 | si->addr.ipv6 = gate->ipv6; |
442 | break; | |
23443030 | 443 | case STATIC_IFNAME: |
d62a17ae | 444 | break; |
445 | } | |
446 | ||
447 | /* Save labels, if any. */ | |
448 | memcpy(&si->snh_label, snh_label, sizeof(struct static_nh_label)); | |
449 | ||
450 | /* Add new static route information to the tree with sort by | |
451 | distance value and gateway address. */ | |
452 | for (pp = NULL, cp = rn->info; cp; pp = cp, cp = cp->next) { | |
453 | if (si->distance < cp->distance) | |
454 | break; | |
455 | if (si->distance > cp->distance) | |
456 | continue; | |
457 | if (si->type == STATIC_IPV4_GATEWAY | |
458 | && cp->type == STATIC_IPV4_GATEWAY) { | |
459 | if (ntohl(si->addr.ipv4.s_addr) | |
460 | < ntohl(cp->addr.ipv4.s_addr)) | |
461 | break; | |
462 | if (ntohl(si->addr.ipv4.s_addr) | |
463 | > ntohl(cp->addr.ipv4.s_addr)) | |
464 | continue; | |
465 | } | |
466 | } | |
467 | ||
468 | /* Make linked list. */ | |
469 | if (pp) | |
470 | pp->next = si; | |
471 | else | |
472 | rn->info = si; | |
473 | if (cp) | |
474 | cp->prev = si; | |
475 | si->prev = pp; | |
476 | si->next = cp; | |
477 | ||
c3c04063 DL |
478 | /* check whether interface exists in system & install if it does */ |
479 | if (!ifname) | |
480 | static_install_route(afi, safi, p, src_p, si); | |
481 | else { | |
482 | struct interface *ifp; | |
483 | ||
484 | ifp = if_lookup_by_name(ifname, zvrf_id(zvrf)); | |
485 | if (ifp && ifp->ifindex != IFINDEX_INTERNAL) { | |
486 | si->ifindex = ifp->ifindex; | |
487 | static_install_route(afi, safi, p, src_p, si); | |
488 | } | |
489 | } | |
d62a17ae | 490 | |
491 | return 1; | |
492 | } | |
493 | ||
494 | int static_delete_route(afi_t afi, safi_t safi, u_char type, struct prefix *p, | |
495 | struct prefix_ipv6 *src_p, union g_addr *gate, | |
c3c04063 | 496 | const char *ifname, route_tag_t tag, u_char distance, |
d62a17ae | 497 | struct zebra_vrf *zvrf, |
498 | struct static_nh_label *snh_label) | |
499 | { | |
500 | struct route_node *rn; | |
501 | struct static_route *si; | |
502 | struct route_table *stable; | |
503 | ||
504 | /* Lookup table. */ | |
505 | stable = zebra_vrf_static_table(afi, safi, zvrf); | |
506 | if (!stable) | |
507 | return -1; | |
508 | ||
509 | /* Lookup static route prefix. */ | |
510 | rn = srcdest_rnode_lookup(stable, p, src_p); | |
511 | if (!rn) | |
512 | return 0; | |
513 | ||
514 | /* Find same static route is the tree */ | |
515 | for (si = rn->info; si; si = si->next) | |
516 | if (type == si->type | |
9d303b37 | 517 | && (!gate || ((afi == AFI_IP |
19aad877 | 518 | && IPV4_ADDR_SAME(&gate->ipv4, &si->addr.ipv4)) |
9d303b37 DL |
519 | || (afi == AFI_IP6 |
520 | && IPV6_ADDR_SAME(gate, &si->addr.ipv6)))) | |
c3c04063 | 521 | && (!strcmp(ifname ? ifname : "", si->ifname)) |
d62a17ae | 522 | && (!tag || (tag == si->tag)) |
523 | && (!snh_label->num_labels | |
524 | || !memcmp(&si->snh_label, snh_label, | |
525 | sizeof(struct static_nh_label)))) | |
526 | break; | |
527 | ||
528 | /* Can't find static route. */ | |
529 | if (!si) { | |
530 | route_unlock_node(rn); | |
531 | return 0; | |
532 | } | |
533 | ||
c3c04063 DL |
534 | /* Uninstall from rib. */ |
535 | if (!si->ifname[0] || si->ifindex != IFINDEX_INTERNAL) | |
536 | static_uninstall_route(afi, safi, p, src_p, si); | |
d62a17ae | 537 | |
538 | /* Unlink static route from linked list. */ | |
539 | if (si->prev) | |
540 | si->prev->next = si->next; | |
541 | else | |
542 | rn->info = si->next; | |
543 | if (si->next) | |
544 | si->next->prev = si->prev; | |
545 | route_unlock_node(rn); | |
546 | ||
547 | /* Free static route configuration. */ | |
548 | XFREE(MTYPE_STATIC_ROUTE, si); | |
549 | ||
550 | route_unlock_node(rn); | |
551 | ||
552 | return 1; | |
28f6dde8 | 553 | } |
c3c04063 DL |
554 | |
555 | static void static_ifindex_update_af(struct interface *ifp, bool up, | |
556 | afi_t afi, safi_t safi) | |
557 | { | |
558 | struct route_table *stable; | |
559 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); | |
560 | struct route_node *rn; | |
561 | struct static_route *si; | |
562 | struct prefix *p, *src_pp; | |
563 | struct prefix_ipv6 *src_p; | |
564 | ||
565 | stable = zebra_vrf_static_table(afi, safi, zvrf); | |
566 | if (!stable) | |
567 | return; | |
568 | ||
569 | for (rn = route_top(stable); rn; rn = srcdest_route_next(rn)) { | |
570 | srcdest_rnode_prefixes(rn, &p, &src_pp); | |
571 | src_p = (struct prefix_ipv6 *)src_pp; | |
572 | ||
573 | for (si = rn->info; si; si = si->next) { | |
574 | if (!si->ifname[0]) | |
575 | continue; | |
576 | if (up) { | |
577 | if (strcmp(si->ifname, ifp->name)) | |
578 | continue; | |
579 | si->ifindex = ifp->ifindex; | |
580 | static_install_route(afi, safi, p, src_p, si); | |
581 | } else { | |
582 | if (si->ifindex != ifp->ifindex) | |
583 | continue; | |
584 | static_uninstall_route(afi, safi, p, src_p, | |
585 | si); | |
586 | si->ifindex = IFINDEX_INTERNAL; | |
587 | } | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
592 | /* called from if_{add,delete}_update, i.e. when ifindex becomes [in]valid */ | |
593 | void static_ifindex_update(struct interface *ifp, bool up) | |
594 | { | |
595 | static_ifindex_update_af(ifp, up, AFI_IP, SAFI_UNICAST); | |
596 | static_ifindex_update_af(ifp, up, AFI_IP, SAFI_MULTICAST); | |
597 | static_ifindex_update_af(ifp, up, AFI_IP6, SAFI_UNICAST); | |
598 | static_ifindex_update_af(ifp, up, AFI_IP6, SAFI_MULTICAST); | |
599 | } |