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718e3744 | 1 | /* RIP version 1 and 2. |
fbf5d033 | 2 | * Copyright (C) 2005 6WIND <alain.ritoux@6wind.com> |
718e3744 | 3 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro <kunihiro@zebra.org> |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
b2d7c082 | 24 | #include "vrf.h" |
718e3744 | 25 | #include "if.h" |
26 | #include "command.h" | |
27 | #include "prefix.h" | |
28 | #include "table.h" | |
29 | #include "thread.h" | |
30 | #include "memory.h" | |
31 | #include "log.h" | |
32 | #include "stream.h" | |
33 | #include "filter.h" | |
34 | #include "sockunion.h" | |
1af81933 | 35 | #include "sockopt.h" |
718e3744 | 36 | #include "routemap.h" |
16705130 | 37 | #include "if_rmap.h" |
718e3744 | 38 | #include "plist.h" |
39 | #include "distribute.h" | |
0513a271 | 40 | #ifdef CRYPTO_INTERNAL |
c1a03d47 | 41 | #include "md5.h" |
0513a271 | 42 | #endif |
718e3744 | 43 | #include "keychain.h" |
edd7c245 | 44 | #include "privs.h" |
77cbe4a1 | 45 | #include "lib_errors.h" |
8c9226c2 | 46 | #include "northbound_cli.h" |
5920b3eb | 47 | #include "network.h" |
53bb7f9b | 48 | #include "lib/printfrr.h" |
718e3744 | 49 | |
50 | #include "ripd/ripd.h" | |
f80ec39e | 51 | #include "ripd/rip_nb.h" |
718e3744 | 52 | #include "ripd/rip_debug.h" |
518e377f | 53 | #include "ripd/rip_errors.h" |
ae7b826a | 54 | #include "ripd/rip_interface.h" |
718e3744 | 55 | |
0b3acf4f | 56 | /* UDP receive buffer size */ |
57 | #define RIP_UDP_RCV_BUF 41600 | |
58 | ||
bf8d3d6a DL |
59 | DEFINE_MGROUP(RIPD, "ripd"); |
60 | DEFINE_MTYPE_STATIC(RIPD, RIP, "RIP structure"); | |
61 | DEFINE_MTYPE_STATIC(RIPD, RIP_VRF_NAME, "RIP VRF name"); | |
62 | DEFINE_MTYPE_STATIC(RIPD, RIP_INFO, "RIP route info"); | |
63 | DEFINE_MTYPE_STATIC(RIPD, RIP_DISTANCE, "RIP distance"); | |
814a2585 | 64 | |
718e3744 | 65 | /* Prototypes. */ |
d62a17ae | 66 | static void rip_output_process(struct connected *, struct sockaddr_in *, int, |
d7c0a89a | 67 | uint8_t); |
cc9f21da | 68 | static void rip_triggered_update(struct thread *); |
d62a17ae | 69 | static int rip_update_jitter(unsigned long); |
2826309c RW |
70 | static void rip_distance_table_node_cleanup(struct route_table *table, |
71 | struct route_node *node); | |
ae7b826a RW |
72 | static void rip_instance_enable(struct rip *rip, struct vrf *vrf, int sock); |
73 | static void rip_instance_disable(struct rip *rip); | |
6b0655a2 | 74 | |
03a38493 PG |
75 | static void rip_distribute_update(struct distribute_ctx *ctx, |
76 | struct distribute *dist); | |
77 | ||
4b23867c PG |
78 | static void rip_if_rmap_update(struct if_rmap_ctx *ctx, |
79 | struct if_rmap *if_rmap); | |
80 | ||
718e3744 | 81 | /* RIP output routes type. */ |
d62a17ae | 82 | enum { rip_all_route, rip_changed_route }; |
6b0655a2 | 83 | |
718e3744 | 84 | /* RIP command strings. */ |
d62a17ae | 85 | static const struct message rip_msg[] = {{RIP_REQUEST, "REQUEST"}, |
86 | {RIP_RESPONSE, "RESPONSE"}, | |
87 | {RIP_TRACEON, "TRACEON"}, | |
88 | {RIP_TRACEOFF, "TRACEOFF"}, | |
89 | {RIP_POLL, "POLL"}, | |
90 | {RIP_POLL_ENTRY, "POLL ENTRY"}, | |
91 | {0}}; | |
6b0655a2 | 92 | |
ae7b826a RW |
93 | /* Generate rb-tree of RIP instances. */ |
94 | static inline int rip_instance_compare(const struct rip *a, const struct rip *b) | |
95 | { | |
96 | return strcmp(a->vrf_name, b->vrf_name); | |
97 | } | |
98 | RB_GENERATE(rip_instance_head, rip, entry, rip_instance_compare) | |
99 | ||
100 | struct rip_instance_head rip_instances = RB_INITIALIZER(&rip_instances); | |
101 | ||
ab9939f2 | 102 | /* Utility function to set broadcast option to the socket. */ |
d62a17ae | 103 | static int sockopt_broadcast(int sock) |
718e3744 | 104 | { |
d62a17ae | 105 | int ret; |
106 | int on = 1; | |
718e3744 | 107 | |
d62a17ae | 108 | ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&on, |
0d6f7fd6 | 109 | sizeof(on)); |
d62a17ae | 110 | if (ret < 0) { |
111 | zlog_warn("can't set sockopt SO_BROADCAST to socket %d", sock); | |
112 | return -1; | |
113 | } | |
114 | return 0; | |
718e3744 | 115 | } |
116 | ||
1137aef4 | 117 | int rip_route_rte(struct rip_info *rinfo) |
718e3744 | 118 | { |
d62a17ae | 119 | return (rinfo->type == ZEBRA_ROUTE_RIP |
120 | && rinfo->sub_type == RIP_ROUTE_RTE); | |
718e3744 | 121 | } |
122 | ||
d62a17ae | 123 | static struct rip_info *rip_info_new(void) |
718e3744 | 124 | { |
d62a17ae | 125 | return XCALLOC(MTYPE_RIP_INFO, sizeof(struct rip_info)); |
718e3744 | 126 | } |
127 | ||
d62a17ae | 128 | void rip_info_free(struct rip_info *rinfo) |
718e3744 | 129 | { |
d62a17ae | 130 | XFREE(MTYPE_RIP_INFO, rinfo); |
718e3744 | 131 | } |
132 | ||
045c5389 RW |
133 | struct rip *rip_info_get_instance(const struct rip_info *rinfo) |
134 | { | |
135 | return route_table_get_info(rinfo->rp->table); | |
136 | } | |
137 | ||
718e3744 | 138 | /* RIP route garbage collect timer. */ |
cc9f21da | 139 | static void rip_garbage_collect(struct thread *t) |
718e3744 | 140 | { |
d62a17ae | 141 | struct rip_info *rinfo; |
142 | struct route_node *rp; | |
143 | ||
144 | rinfo = THREAD_ARG(t); | |
718e3744 | 145 | |
d62a17ae | 146 | /* Off timeout timer. */ |
580e37a3 | 147 | THREAD_OFF(rinfo->t_timeout); |
718e3744 | 148 | |
d62a17ae | 149 | /* Get route_node pointer. */ |
150 | rp = rinfo->rp; | |
718e3744 | 151 | |
d62a17ae | 152 | /* Unlock route_node. */ |
153 | listnode_delete(rp->info, rinfo); | |
154 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 155 | list_delete((struct list **)&rp->info); |
d62a17ae | 156 | route_unlock_node(rp); |
157 | } | |
718e3744 | 158 | |
d62a17ae | 159 | /* Free RIP routing information. */ |
160 | rip_info_free(rinfo); | |
718e3744 | 161 | } |
162 | ||
045c5389 | 163 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo); |
bce8e868 LF |
164 | |
165 | /* Add new route to the ECMP list. | |
8478ae7e LF |
166 | * RETURN: the new entry added in the list, or NULL if it is not the first |
167 | * entry and ECMP is not allowed. | |
bce8e868 | 168 | */ |
045c5389 | 169 | struct rip_info *rip_ecmp_add(struct rip *rip, struct rip_info *rinfo_new) |
718e3744 | 170 | { |
d62a17ae | 171 | struct route_node *rp = rinfo_new->rp; |
172 | struct rip_info *rinfo = NULL; | |
173 | struct list *list = NULL; | |
718e3744 | 174 | |
d62a17ae | 175 | if (rp->info == NULL) |
176 | rp->info = list_new(); | |
177 | list = (struct list *)rp->info; | |
bce8e868 | 178 | |
d62a17ae | 179 | /* If ECMP is not allowed and some entry already exists in the list, |
180 | * do nothing. */ | |
181 | if (listcount(list) && !rip->ecmp) | |
182 | return NULL; | |
8478ae7e | 183 | |
d62a17ae | 184 | rinfo = rip_info_new(); |
185 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
186 | listnode_add(list, rinfo); | |
bce8e868 | 187 | |
d62a17ae | 188 | if (rip_route_rte(rinfo)) { |
045c5389 RW |
189 | rip_timeout_update(rip, rinfo); |
190 | rip_zebra_ipv4_add(rip, rp); | |
d62a17ae | 191 | } |
bce8e868 | 192 | |
d62a17ae | 193 | /* Set the route change flag on the first entry. */ |
194 | rinfo = listgetdata(listhead(list)); | |
195 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 196 | |
d62a17ae | 197 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 198 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 199 | |
d62a17ae | 200 | return rinfo; |
bce8e868 LF |
201 | } |
202 | ||
203 | /* Replace the ECMP list with the new route. | |
204 | * RETURN: the new entry added in the list | |
205 | */ | |
045c5389 | 206 | struct rip_info *rip_ecmp_replace(struct rip *rip, struct rip_info *rinfo_new) |
d62a17ae | 207 | { |
208 | struct route_node *rp = rinfo_new->rp; | |
209 | struct list *list = (struct list *)rp->info; | |
210 | struct rip_info *rinfo = NULL, *tmp_rinfo = NULL; | |
211 | struct listnode *node = NULL, *nextnode = NULL; | |
212 | ||
213 | if (list == NULL || listcount(list) == 0) | |
045c5389 | 214 | return rip_ecmp_add(rip, rinfo_new); |
d62a17ae | 215 | |
216 | /* Get the first entry */ | |
217 | rinfo = listgetdata(listhead(list)); | |
218 | ||
219 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
220 | if (rip_route_rte(rinfo) && !rip_route_rte(rinfo_new)) | |
221 | if (CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 222 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 223 | |
224 | /* Re-use the first entry, and delete the others. */ | |
91b508dc DS |
225 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) { |
226 | if (tmp_rinfo == rinfo) | |
227 | continue; | |
228 | ||
580e37a3 DS |
229 | THREAD_OFF(tmp_rinfo->t_timeout); |
230 | THREAD_OFF(tmp_rinfo->t_garbage_collect); | |
91b508dc DS |
231 | list_delete_node(list, node); |
232 | rip_info_free(tmp_rinfo); | |
233 | } | |
718e3744 | 234 | |
580e37a3 DS |
235 | THREAD_OFF(rinfo->t_timeout); |
236 | THREAD_OFF(rinfo->t_garbage_collect); | |
d62a17ae | 237 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); |
718e3744 | 238 | |
d62a17ae | 239 | if (rip_route_rte(rinfo)) { |
045c5389 | 240 | rip_timeout_update(rip, rinfo); |
d62a17ae | 241 | /* The ADD message implies an update. */ |
045c5389 | 242 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 243 | } |
718e3744 | 244 | |
d62a17ae | 245 | /* Set the route change flag. */ |
246 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
718e3744 | 247 | |
d62a17ae | 248 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 249 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 250 | |
d62a17ae | 251 | return rinfo; |
bce8e868 LF |
252 | } |
253 | ||
254 | /* Delete one route from the ECMP list. | |
255 | * RETURN: | |
256 | * null - the entry is freed, and other entries exist in the list | |
257 | * the entry - the entry is the last one in the list; its metric is set | |
258 | * to INFINITY, and the garbage collector is started for it | |
259 | */ | |
045c5389 | 260 | struct rip_info *rip_ecmp_delete(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 261 | { |
262 | struct route_node *rp = rinfo->rp; | |
263 | struct list *list = (struct list *)rp->info; | |
264 | ||
580e37a3 | 265 | THREAD_OFF(rinfo->t_timeout); |
d62a17ae | 266 | |
267 | if (listcount(list) > 1) { | |
268 | /* Some other ECMP entries still exist. Just delete this entry. | |
269 | */ | |
580e37a3 | 270 | THREAD_OFF(rinfo->t_garbage_collect); |
d62a17ae | 271 | listnode_delete(list, rinfo); |
272 | if (rip_route_rte(rinfo) | |
273 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
274 | /* The ADD message implies the update. */ | |
045c5389 | 275 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 276 | rip_info_free(rinfo); |
277 | rinfo = NULL; | |
278 | } else { | |
279 | assert(rinfo == listgetdata(listhead(list))); | |
280 | ||
281 | /* This is the only entry left in the list. We must keep it in | |
282 | * the list for garbage collection time, with INFINITY metric. | |
283 | */ | |
284 | ||
285 | rinfo->metric = RIP_METRIC_INFINITY; | |
286 | RIP_TIMER_ON(rinfo->t_garbage_collect, rip_garbage_collect, | |
287 | rip->garbage_time); | |
288 | ||
289 | if (rip_route_rte(rinfo) | |
290 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 291 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 292 | } |
bce8e868 | 293 | |
d62a17ae | 294 | /* Set the route change flag on the first entry. */ |
295 | rinfo = listgetdata(listhead(list)); | |
296 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 297 | |
d62a17ae | 298 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 299 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
bce8e868 | 300 | |
d62a17ae | 301 | return rinfo; |
bce8e868 LF |
302 | } |
303 | ||
304 | /* Timeout RIP routes. */ | |
cc9f21da | 305 | static void rip_timeout(struct thread *t) |
bce8e868 | 306 | { |
045c5389 RW |
307 | struct rip_info *rinfo = THREAD_ARG(t); |
308 | struct rip *rip = rip_info_get_instance(rinfo); | |
309 | ||
310 | rip_ecmp_delete(rip, rinfo); | |
718e3744 | 311 | } |
312 | ||
045c5389 | 313 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo) |
718e3744 | 314 | { |
d62a17ae | 315 | if (rinfo->metric != RIP_METRIC_INFINITY) { |
580e37a3 | 316 | THREAD_OFF(rinfo->t_timeout); |
045c5389 RW |
317 | thread_add_timer(master, rip_timeout, rinfo, rip->timeout_time, |
318 | &rinfo->t_timeout); | |
d62a17ae | 319 | } |
320 | } | |
321 | ||
322 | static int rip_filter(int rip_distribute, struct prefix_ipv4 *p, | |
323 | struct rip_interface *ri) | |
324 | { | |
325 | struct distribute *dist; | |
326 | struct access_list *alist; | |
327 | struct prefix_list *plist; | |
328 | int distribute = rip_distribute == RIP_FILTER_OUT ? DISTRIBUTE_V4_OUT | |
329 | : DISTRIBUTE_V4_IN; | |
330 | const char *inout = rip_distribute == RIP_FILTER_OUT ? "out" : "in"; | |
331 | ||
332 | /* Input distribute-list filtering. */ | |
91b508dc DS |
333 | if (ri->list[rip_distribute] && |
334 | access_list_apply(ri->list[rip_distribute], (struct prefix *)p) == | |
335 | FILTER_DENY) { | |
336 | if (IS_RIP_DEBUG_PACKET) | |
337 | zlog_debug("%pFX filtered by distribute %s", p, inout); | |
338 | return -1; | |
718e3744 | 339 | } |
91b508dc DS |
340 | |
341 | if (ri->prefix[rip_distribute] && | |
342 | prefix_list_apply(ri->prefix[rip_distribute], (struct prefix *)p) == | |
343 | PREFIX_DENY) { | |
344 | if (IS_RIP_DEBUG_PACKET) | |
345 | zlog_debug("%pFX filtered by prefix-list %s", p, inout); | |
346 | return -1; | |
718e3744 | 347 | } |
d62a17ae | 348 | |
349 | /* All interface filter check. */ | |
045c5389 | 350 | dist = distribute_lookup(ri->rip->distribute_ctx, NULL); |
91b508dc DS |
351 | if (!dist) |
352 | return 0; | |
d62a17ae | 353 | |
91b508dc DS |
354 | if (dist->list[distribute]) { |
355 | alist = access_list_lookup(AFI_IP, dist->list[distribute]); | |
356 | ||
357 | if (alist) { | |
358 | if (access_list_apply(alist, (struct prefix *)p) == | |
359 | FILTER_DENY) { | |
360 | if (IS_RIP_DEBUG_PACKET) | |
361 | zlog_debug( | |
362 | "%pFX filtered by distribute %s", | |
363 | p, inout); | |
364 | return -1; | |
d62a17ae | 365 | } |
366 | } | |
91b508dc DS |
367 | } |
368 | if (dist->prefix[distribute]) { | |
369 | plist = prefix_list_lookup(AFI_IP, dist->prefix[distribute]); | |
370 | ||
371 | if (plist) { | |
372 | if (prefix_list_apply(plist, (struct prefix *)p) == | |
373 | PREFIX_DENY) { | |
374 | if (IS_RIP_DEBUG_PACKET) | |
375 | zlog_debug( | |
376 | "%pFX filtered by prefix-list %s", | |
377 | p, inout); | |
378 | return -1; | |
d62a17ae | 379 | } |
380 | } | |
381 | } | |
91b508dc | 382 | |
d62a17ae | 383 | return 0; |
718e3744 | 384 | } |
385 | ||
386 | /* Check nexthop address validity. */ | |
045c5389 | 387 | static int rip_nexthop_check(struct rip *rip, struct in_addr *addr) |
718e3744 | 388 | { |
d62a17ae | 389 | struct interface *ifp; |
f4e14fdb | 390 | struct listnode *cnode; |
d62a17ae | 391 | struct connected *ifc; |
392 | struct prefix *p; | |
718e3744 | 393 | |
d62a17ae | 394 | /* If nexthop address matches local configured address then it is |
395 | invalid nexthop. */ | |
b2d7c082 | 396 | |
ae7b826a | 397 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 398 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, ifc)) { |
399 | p = ifc->address; | |
718e3744 | 400 | |
d62a17ae | 401 | if (p->family == AF_INET |
402 | && IPV4_ADDR_SAME(&p->u.prefix4, addr)) | |
403 | return -1; | |
404 | } | |
718e3744 | 405 | } |
d62a17ae | 406 | return 0; |
718e3744 | 407 | } |
408 | ||
409 | /* RIP add route to routing table. */ | |
d62a17ae | 410 | static void rip_rte_process(struct rte *rte, struct sockaddr_in *from, |
411 | struct interface *ifp) | |
412 | { | |
045c5389 | 413 | struct rip *rip; |
d62a17ae | 414 | int ret; |
415 | struct prefix_ipv4 p; | |
416 | struct route_node *rp; | |
417 | struct rip_info *rinfo = NULL, newinfo; | |
418 | struct rip_interface *ri; | |
419 | struct in_addr *nexthop; | |
420 | int same = 0; | |
421 | unsigned char old_dist, new_dist; | |
422 | struct list *list = NULL; | |
423 | struct listnode *node = NULL; | |
424 | ||
425 | /* Make prefix structure. */ | |
426 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
427 | p.family = AF_INET; | |
428 | p.prefix = rte->prefix; | |
429 | p.prefixlen = ip_masklen(rte->mask); | |
430 | ||
431 | /* Make sure mask is applied. */ | |
432 | apply_mask_ipv4(&p); | |
433 | ||
d62a17ae | 434 | ri = ifp->info; |
045c5389 | 435 | rip = ri->rip; |
718e3744 | 436 | |
045c5389 | 437 | /* Apply input filters. */ |
d62a17ae | 438 | ret = rip_filter(RIP_FILTER_IN, &p, ri); |
439 | if (ret < 0) | |
440 | return; | |
441 | ||
442 | memset(&newinfo, 0, sizeof(newinfo)); | |
443 | newinfo.type = ZEBRA_ROUTE_RIP; | |
444 | newinfo.sub_type = RIP_ROUTE_RTE; | |
dd127197 | 445 | newinfo.nh.gate.ipv4 = rte->nexthop; |
d62a17ae | 446 | newinfo.from = from->sin_addr; |
dd127197 DS |
447 | newinfo.nh.ifindex = ifp->ifindex; |
448 | newinfo.nh.type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
d62a17ae | 449 | newinfo.metric = rte->metric; |
450 | newinfo.metric_out = rte->metric; /* XXX */ | |
451 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
452 | ||
453 | /* Modify entry according to the interface routemap. */ | |
454 | if (ri->routemap[RIP_FILTER_IN]) { | |
d62a17ae | 455 | /* The object should be of the type of rip_info */ |
456 | ret = route_map_apply(ri->routemap[RIP_FILTER_IN], | |
1782514f | 457 | (struct prefix *)&p, &newinfo); |
d62a17ae | 458 | |
459 | if (ret == RMAP_DENYMATCH) { | |
460 | if (IS_RIP_DEBUG_PACKET) | |
461 | zlog_debug( | |
53bb7f9b MS |
462 | "RIP %pFX is filtered by route-map in", |
463 | &p); | |
d62a17ae | 464 | return; |
465 | } | |
466 | ||
467 | /* Get back the object */ | |
468 | rte->nexthop = newinfo.nexthop_out; | |
469 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
996c9314 LB |
470 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the |
471 | metric_out field */ | |
d62a17ae | 472 | } |
473 | ||
474 | /* Once the entry has been validated, update the metric by | |
ab9939f2 | 475 | adding the cost of the network on which the message |
d62a17ae | 476 | arrived. If the result is greater than infinity, use infinity |
477 | (RFC2453 Sec. 3.9.2) */ | |
478 | /* Zebra ripd can handle offset-list in. */ | |
479 | ret = rip_offset_list_apply_in(&p, ifp, &rte->metric); | |
718e3744 | 480 | |
d62a17ae | 481 | /* If offset-list does not modify the metric use interface's |
482 | metric. */ | |
483 | if (!ret) | |
484 | rte->metric += ifp->metric ? ifp->metric : 1; | |
718e3744 | 485 | |
d62a17ae | 486 | if (rte->metric > RIP_METRIC_INFINITY) |
487 | rte->metric = RIP_METRIC_INFINITY; | |
488 | ||
489 | /* Set nexthop pointer. */ | |
3a6290bd | 490 | if (rte->nexthop.s_addr == INADDR_ANY) |
d62a17ae | 491 | nexthop = &from->sin_addr; |
492 | else | |
493 | nexthop = &rte->nexthop; | |
494 | ||
495 | /* Check if nexthop address is myself, then do nothing. */ | |
045c5389 | 496 | if (rip_nexthop_check(rip, nexthop) < 0) { |
d62a17ae | 497 | if (IS_RIP_DEBUG_PACKET) |
53bb7f9b MS |
498 | zlog_debug("Nexthop address %pI4 is myself", |
499 | nexthop); | |
d62a17ae | 500 | return; |
501 | } | |
502 | ||
503 | /* Get index for the prefix. */ | |
504 | rp = route_node_get(rip->table, (struct prefix *)&p); | |
505 | ||
506 | newinfo.rp = rp; | |
dd127197 DS |
507 | newinfo.nh.gate.ipv4 = *nexthop; |
508 | newinfo.nh.type = NEXTHOP_TYPE_IPV4; | |
d62a17ae | 509 | newinfo.metric = rte->metric; |
510 | newinfo.tag = ntohs(rte->tag); | |
045c5389 | 511 | newinfo.distance = rip_distance_apply(rip, &newinfo); |
d62a17ae | 512 | |
513 | new_dist = newinfo.distance ? newinfo.distance | |
514 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
515 | ||
516 | /* Check to see whether there is already RIP route on the table. */ | |
517 | if ((list = rp->info) != NULL) | |
518 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
519 | /* Need to compare with redistributed entry or local | |
520 | * entry */ | |
521 | if (!rip_route_rte(rinfo)) | |
522 | break; | |
523 | ||
524 | if (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 525 | && IPV4_ADDR_SAME(&rinfo->nh.gate.ipv4, nexthop)) |
d62a17ae | 526 | break; |
527 | ||
91b508dc DS |
528 | if (listnextnode(node)) |
529 | continue; | |
d62a17ae | 530 | |
91b508dc | 531 | /* Not found in the list */ |
d62a17ae | 532 | |
91b508dc DS |
533 | if (rte->metric > rinfo->metric) { |
534 | /* New route has a greater metric. | |
535 | * Discard it. */ | |
536 | route_unlock_node(rp); | |
537 | return; | |
538 | } | |
d62a17ae | 539 | |
91b508dc DS |
540 | if (rte->metric < rinfo->metric) |
541 | /* New route has a smaller metric. | |
542 | * Replace the ECMP list | |
543 | * with the new one in below. */ | |
544 | break; | |
545 | ||
546 | /* Metrics are same. We compare the distances. | |
547 | */ | |
548 | old_dist = rinfo->distance ? rinfo->distance | |
d62a17ae | 549 | : ZEBRA_RIP_DISTANCE_DEFAULT; |
550 | ||
91b508dc DS |
551 | if (new_dist > old_dist) { |
552 | /* New route has a greater distance. | |
553 | * Discard it. */ | |
554 | route_unlock_node(rp); | |
555 | return; | |
556 | } | |
d62a17ae | 557 | |
91b508dc DS |
558 | if (new_dist < old_dist) |
559 | /* New route has a smaller distance. | |
560 | * Replace the ECMP list | |
561 | * with the new one in below. */ | |
562 | break; | |
d62a17ae | 563 | |
91b508dc DS |
564 | /* Metrics and distances are both same. Keep |
565 | * "rinfo" null and | |
566 | * the new route is added in the ECMP list in | |
567 | * below. */ | |
718e3744 | 568 | } |
d62a17ae | 569 | |
570 | if (rinfo) { | |
571 | /* Local static route. */ | |
572 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
573 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
574 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
575 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
576 | route_unlock_node(rp); | |
577 | return; | |
718e3744 | 578 | } |
d62a17ae | 579 | |
580 | /* Redistributed route check. */ | |
581 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
582 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
583 | old_dist = rinfo->distance; | |
584 | /* Only routes directly connected to an interface | |
585 | * (nexthop == 0) | |
586 | * may have a valid NULL distance */ | |
3a6290bd | 587 | if (rinfo->nh.gate.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 588 | old_dist = old_dist |
589 | ? old_dist | |
590 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
591 | /* If imported route does not have STRICT precedence, | |
592 | mark it as a ghost */ | |
593 | if (new_dist <= old_dist | |
594 | && rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 595 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 596 | |
597 | route_unlock_node(rp); | |
598 | return; | |
718e3744 | 599 | } |
d62a17ae | 600 | } |
601 | ||
602 | if (!rinfo) { | |
603 | if (rp->info) | |
604 | route_unlock_node(rp); | |
605 | ||
606 | /* Now, check to see whether there is already an explicit route | |
607 | for the destination prefix. If there is no such route, add | |
608 | this route to the routing table, unless the metric is | |
609 | infinity (there is no point in adding a route which | |
610 | unusable). */ | |
611 | if (rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 612 | rip_ecmp_add(rip, &newinfo); |
d62a17ae | 613 | } else { |
614 | /* Route is there but we are not sure the route is RIP or not. | |
615 | */ | |
616 | ||
617 | /* If there is an existing route, compare the next hop address | |
618 | to the address of the router from which the datagram came. | |
619 | If this datagram is from the same router as the existing | |
620 | route, reinitialize the timeout. */ | |
621 | same = (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 622 | && (rinfo->nh.ifindex == ifp->ifindex)); |
d62a17ae | 623 | |
624 | old_dist = rinfo->distance ? rinfo->distance | |
625 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
626 | ||
627 | /* Next, compare the metrics. If the datagram is from the same | |
628 | router as the existing route, and the new metric is different | |
629 | than the old one; or, if the new metric is lower than the old | |
630 | one, or if the tag has been changed; or if there is a route | |
631 | with a lower administrave distance; or an update of the | |
632 | distance on the actual route; do the following actions: */ | |
633 | if ((same && rinfo->metric != rte->metric) | |
634 | || (rte->metric < rinfo->metric) | |
635 | || ((same) && (rinfo->metric == rte->metric) | |
636 | && (newinfo.tag != rinfo->tag)) | |
637 | || (old_dist > new_dist) | |
638 | || ((old_dist != new_dist) && same)) { | |
639 | if (listcount(list) == 1) { | |
640 | if (newinfo.metric != RIP_METRIC_INFINITY) | |
045c5389 | 641 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 642 | else |
045c5389 | 643 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 644 | } else { |
645 | if (newinfo.metric < rinfo->metric) | |
045c5389 | 646 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 647 | else if (newinfo.metric > rinfo->metric) |
045c5389 | 648 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 649 | else if (new_dist < old_dist) |
045c5389 | 650 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 651 | else if (new_dist > old_dist) |
045c5389 | 652 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 653 | else { |
654 | int update = CHECK_FLAG(rinfo->flags, | |
655 | RIP_RTF_FIB) | |
656 | ? 1 | |
657 | : 0; | |
658 | ||
659 | assert(newinfo.metric | |
660 | != RIP_METRIC_INFINITY); | |
661 | ||
580e37a3 DS |
662 | THREAD_OFF(rinfo->t_timeout); |
663 | THREAD_OFF(rinfo->t_garbage_collect); | |
d62a17ae | 664 | memcpy(rinfo, &newinfo, |
665 | sizeof(struct rip_info)); | |
045c5389 | 666 | rip_timeout_update(rip, rinfo); |
d62a17ae | 667 | |
668 | if (update) | |
045c5389 | 669 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 670 | |
671 | /* - Set the route change flag on the | |
672 | * first entry. */ | |
673 | rinfo = listgetdata(listhead(list)); | |
674 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
045c5389 | 675 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 676 | } |
677 | } | |
678 | } else /* same & no change */ | |
045c5389 | 679 | rip_timeout_update(rip, rinfo); |
d62a17ae | 680 | |
681 | /* Unlock tempolary lock of the route. */ | |
682 | route_unlock_node(rp); | |
683 | } | |
684 | } | |
685 | ||
686 | /* Dump RIP packet */ | |
687 | static void rip_packet_dump(struct rip_packet *packet, int size, | |
688 | const char *sndrcv) | |
689 | { | |
690 | caddr_t lim; | |
691 | struct rte *rte; | |
692 | const char *command_str; | |
d7c0a89a QY |
693 | uint8_t netmask = 0; |
694 | uint8_t *p; | |
d62a17ae | 695 | |
696 | /* Set command string. */ | |
697 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
698 | command_str = lookup_msg(rip_msg, packet->command, NULL); | |
699 | else | |
700 | command_str = "unknown"; | |
701 | ||
702 | /* Dump packet header. */ | |
703 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
704 | packet->version, size); | |
705 | ||
706 | /* Dump each routing table entry. */ | |
707 | rte = packet->rte; | |
708 | ||
709 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
710 | if (packet->version == RIPv2) { | |
711 | netmask = ip_masklen(rte->mask); | |
712 | ||
713 | if (rte->family == htons(RIP_FAMILY_AUTH)) { | |
714 | if (rte->tag | |
715 | == htons(RIP_AUTH_SIMPLE_PASSWORD)) { | |
d7c0a89a | 716 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 717 | |
718 | zlog_debug( | |
719 | " family 0x%X type %d auth string: %s", | |
720 | ntohs(rte->family), | |
721 | ntohs(rte->tag), p); | |
722 | } else if (rte->tag == htons(RIP_AUTH_MD5)) { | |
723 | struct rip_md5_info *md5; | |
724 | ||
725 | md5 = (struct rip_md5_info *)&packet | |
726 | ->rte; | |
727 | ||
728 | zlog_debug( | |
729 | " family 0x%X type %d (MD5 authentication)", | |
730 | ntohs(md5->family), | |
731 | ntohs(md5->type)); | |
732 | zlog_debug( | |
3efd0893 | 733 | " RIP-2 packet len %d Key ID %d Auth Data len %d", |
d62a17ae | 734 | ntohs(md5->packet_len), |
735 | md5->keyid, md5->auth_len); | |
d7c0a89a QY |
736 | zlog_debug(" Sequence Number %ld", |
737 | (unsigned long)ntohl( | |
738 | md5->sequence)); | |
d62a17ae | 739 | } else if (rte->tag == htons(RIP_AUTH_DATA)) { |
d7c0a89a | 740 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 741 | |
742 | zlog_debug( | |
743 | " family 0x%X type %d (MD5 data)", | |
744 | ntohs(rte->family), | |
745 | ntohs(rte->tag)); | |
746 | zlog_debug( | |
3efd0893 | 747 | " MD5: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", |
d62a17ae | 748 | p[0], p[1], p[2], p[3], p[4], |
749 | p[5], p[6], p[7], p[8], p[9], | |
750 | p[10], p[11], p[12], p[13], | |
751 | p[14], p[15]); | |
752 | } else { | |
753 | zlog_debug( | |
754 | " family 0x%X type %d (Unknown auth type)", | |
755 | ntohs(rte->family), | |
756 | ntohs(rte->tag)); | |
757 | } | |
758 | } else | |
759 | zlog_debug( | |
2e2262fe | 760 | " %pI4/%d -> %pI4 family %d tag %" ROUTE_TAG_PRI |
d62a17ae | 761 | " metric %ld", |
2e2262fe | 762 | &rte->prefix, netmask, &rte->nexthop, |
d62a17ae | 763 | ntohs(rte->family), |
764 | (route_tag_t)ntohs(rte->tag), | |
d7c0a89a | 765 | (unsigned long)ntohl(rte->metric)); |
d62a17ae | 766 | } else { |
2e2262fe DS |
767 | zlog_debug(" %pI4 family %d tag %" ROUTE_TAG_PRI |
768 | " metric %ld", | |
769 | &rte->prefix, ntohs(rte->family), | |
770 | (route_tag_t)ntohs(rte->tag), | |
771 | (unsigned long)ntohl(rte->metric)); | |
718e3744 | 772 | } |
718e3744 | 773 | } |
718e3744 | 774 | } |
775 | ||
776 | /* Check if the destination address is valid (unicast; not net 0 | |
777 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
778 | check net 0 because we accept default route. */ | |
d62a17ae | 779 | static int rip_destination_check(struct in_addr addr) |
718e3744 | 780 | { |
d7c0a89a | 781 | uint32_t destination; |
718e3744 | 782 | |
d62a17ae | 783 | /* Convert to host byte order. */ |
784 | destination = ntohl(addr.s_addr); | |
718e3744 | 785 | |
d62a17ae | 786 | if (IPV4_NET127(destination)) |
787 | return 0; | |
718e3744 | 788 | |
d62a17ae | 789 | /* Net 0 may match to the default route. */ |
790 | if (IPV4_NET0(destination) && destination != 0) | |
791 | return 0; | |
718e3744 | 792 | |
d62a17ae | 793 | /* Unicast address must belong to class A, B, C. */ |
794 | if (IN_CLASSA(destination)) | |
795 | return 1; | |
796 | if (IN_CLASSB(destination)) | |
797 | return 1; | |
798 | if (IN_CLASSC(destination)) | |
799 | return 1; | |
718e3744 | 800 | |
d62a17ae | 801 | return 0; |
718e3744 | 802 | } |
803 | ||
804 | /* RIP version 2 authentication. */ | |
d62a17ae | 805 | static int rip_auth_simple_password(struct rte *rte, struct sockaddr_in *from, |
806 | struct interface *ifp) | |
807 | { | |
808 | struct rip_interface *ri; | |
0961ea93 | 809 | char *auth_str = (char *)rte + offsetof(struct rte, prefix); |
d62a17ae | 810 | int i; |
811 | ||
812 | /* reject passwords with zeros in the middle of the string */ | |
0961ea93 | 813 | for (i = strnlen(auth_str, 16); i < 16; i++) { |
d62a17ae | 814 | if (auth_str[i] != '\0') |
815 | return 0; | |
816 | } | |
817 | ||
818 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
819 | zlog_debug("RIPv2 simple password authentication from %pI4", |
820 | &from->sin_addr); | |
d62a17ae | 821 | |
822 | ri = ifp->info; | |
823 | ||
824 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
825 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) | |
826 | return 0; | |
718e3744 | 827 | |
d62a17ae | 828 | /* Simple password authentication. */ |
829 | if (ri->auth_str) { | |
830 | if (strncmp(auth_str, ri->auth_str, 16) == 0) | |
831 | return 1; | |
832 | } | |
833 | if (ri->key_chain) { | |
834 | struct keychain *keychain; | |
835 | struct key *key; | |
836 | ||
837 | keychain = keychain_lookup(ri->key_chain); | |
c4efb224 | 838 | if (keychain == NULL || keychain->key == NULL) |
d62a17ae | 839 | return 0; |
840 | ||
841 | key = key_match_for_accept(keychain, auth_str); | |
842 | if (key) | |
843 | return 1; | |
844 | } | |
845 | return 0; | |
718e3744 | 846 | } |
847 | ||
848 | /* RIP version 2 authentication with MD5. */ | |
d62a17ae | 849 | static int rip_auth_md5(struct rip_packet *packet, struct sockaddr_in *from, |
850 | int length, struct interface *ifp) | |
851 | { | |
852 | struct rip_interface *ri; | |
853 | struct rip_md5_info *md5; | |
854 | struct rip_md5_data *md5data; | |
855 | struct keychain *keychain; | |
856 | struct key *key; | |
0513a271 MR |
857 | #ifdef CRYPTO_OPENSSL |
858 | EVP_MD_CTX *ctx; | |
859 | #elif CRYPTO_INTERNAL | |
d62a17ae | 860 | MD5_CTX ctx; |
0513a271 | 861 | #endif |
d7c0a89a QY |
862 | uint8_t digest[RIP_AUTH_MD5_SIZE]; |
863 | uint16_t packet_len; | |
5c84f238 | 864 | char auth_str[RIP_AUTH_MD5_SIZE] = {}; |
d62a17ae | 865 | |
866 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
867 | zlog_debug("RIPv2 MD5 authentication from %pI4", |
868 | &from->sin_addr); | |
718e3744 | 869 | |
d62a17ae | 870 | ri = ifp->info; |
871 | md5 = (struct rip_md5_info *)&packet->rte; | |
872 | ||
873 | /* Check auth type. */ | |
874 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) | |
875 | return 0; | |
876 | ||
877 | /* If the authentication length is less than 16, then it must be wrong | |
878 | * for | |
879 | * any interpretation of rfc2082. Some implementations also interpret | |
880 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka | |
881 | * RIP_AUTH_MD5_COMPAT_SIZE. | |
882 | */ | |
883 | if (!((md5->auth_len == RIP_AUTH_MD5_SIZE) | |
884 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) { | |
885 | if (IS_RIP_DEBUG_EVENT) | |
886 | zlog_debug( | |
3efd0893 | 887 | "RIPv2 MD5 authentication, strange authentication length field %d", |
d62a17ae | 888 | md5->auth_len); |
889 | return 0; | |
890 | } | |
891 | ||
892 | /* grab and verify check packet length */ | |
893 | packet_len = ntohs(md5->packet_len); | |
718e3744 | 894 | |
d62a17ae | 895 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) { |
896 | if (IS_RIP_DEBUG_EVENT) | |
897 | zlog_debug( | |
3efd0893 | 898 | "RIPv2 MD5 authentication, packet length field %d greater than received length %d!", |
d62a17ae | 899 | md5->packet_len, length); |
900 | return 0; | |
901 | } | |
902 | ||
903 | /* retrieve authentication data */ | |
d7c0a89a | 904 | md5data = (struct rip_md5_data *)(((uint8_t *)packet) + packet_len); |
d62a17ae | 905 | |
d62a17ae | 906 | if (ri->key_chain) { |
907 | keychain = keychain_lookup(ri->key_chain); | |
908 | if (keychain == NULL) | |
909 | return 0; | |
910 | ||
911 | key = key_lookup_for_accept(keychain, md5->keyid); | |
e65e227f | 912 | if (key == NULL || key->string == NULL) |
d62a17ae | 913 | return 0; |
914 | ||
b5b4f44e IR |
915 | memcpy(auth_str, key->string, |
916 | MIN(sizeof(auth_str), strlen(key->string))); | |
d62a17ae | 917 | } else if (ri->auth_str) |
b5b4f44e IR |
918 | memcpy(auth_str, ri->auth_str, |
919 | MIN(sizeof(auth_str), strlen(ri->auth_str))); | |
d62a17ae | 920 | |
921 | if (auth_str[0] == 0) | |
922 | return 0; | |
923 | ||
924 | /* MD5 digest authentication. */ | |
0513a271 MR |
925 | #ifdef CRYPTO_OPENSSL |
926 | unsigned int md5_size = RIP_AUTH_MD5_SIZE; | |
927 | ctx = EVP_MD_CTX_new(); | |
928 | EVP_DigestInit(ctx, EVP_md5()); | |
929 | EVP_DigestUpdate(ctx, packet, packet_len + RIP_HEADER_SIZE); | |
930 | EVP_DigestUpdate(ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
931 | EVP_DigestFinal(ctx, digest, &md5_size); | |
932 | EVP_MD_CTX_free(ctx); | |
933 | #elif CRYPTO_INTERNAL | |
d62a17ae | 934 | memset(&ctx, 0, sizeof(ctx)); |
935 | MD5Init(&ctx); | |
936 | MD5Update(&ctx, packet, packet_len + RIP_HEADER_SIZE); | |
937 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
938 | MD5Final(digest, &ctx); | |
0513a271 | 939 | #endif |
d62a17ae | 940 | |
941 | if (memcmp(md5data->digest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
942 | return packet_len; | |
943 | else | |
944 | return 0; | |
718e3744 | 945 | } |
946 | ||
b14ee00b | 947 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
948 | * (left justified and padded). | |
949 | * | |
950 | * presumes one of ri or key is valid, and that the auth strings they point | |
951 | * to are nul terminated. If neither are present, auth_str will be fully | |
952 | * zero padded. | |
953 | * | |
954 | */ | |
d62a17ae | 955 | static void rip_auth_prepare_str_send(struct rip_interface *ri, struct key *key, |
956 | char *auth_str, int len) | |
718e3744 | 957 | { |
d62a17ae | 958 | assert(ri || key); |
718e3744 | 959 | |
d62a17ae | 960 | memset(auth_str, 0, len); |
961 | if (key && key->string) | |
b5b4f44e IR |
962 | memcpy(auth_str, key->string, |
963 | MIN((size_t)len, strlen(key->string))); | |
d62a17ae | 964 | else if (ri->auth_str) |
b5b4f44e IR |
965 | memcpy(auth_str, ri->auth_str, |
966 | MIN((size_t)len, strlen(ri->auth_str))); | |
718e3744 | 967 | |
d62a17ae | 968 | return; |
b14ee00b | 969 | } |
718e3744 | 970 | |
b14ee00b | 971 | /* Write RIPv2 simple password authentication information |
972 | * | |
d62a17ae | 973 | * auth_str is presumed to be 2 bytes and correctly prepared |
b14ee00b | 974 | * (left justified and zero padded). |
975 | */ | |
d62a17ae | 976 | static void rip_auth_simple_write(struct stream *s, char *auth_str, int len) |
b14ee00b | 977 | { |
d62a17ae | 978 | assert(s && len == RIP_AUTH_SIMPLE_SIZE); |
979 | ||
980 | stream_putw(s, RIP_FAMILY_AUTH); | |
981 | stream_putw(s, RIP_AUTH_SIMPLE_PASSWORD); | |
982 | stream_put(s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
983 | ||
984 | return; | |
b14ee00b | 985 | } |
718e3744 | 986 | |
d62a17ae | 987 | /* write RIPv2 MD5 "authentication header" |
b14ee00b | 988 | * (uses the auth key data field) |
989 | * | |
990 | * Digest offset field is set to 0. | |
991 | * | |
992 | * returns: offset of the digest offset field, which must be set when | |
993 | * length to the auth-data MD5 digest is known. | |
994 | */ | |
d62a17ae | 995 | static size_t rip_auth_md5_ah_write(struct stream *s, struct rip_interface *ri, |
996 | struct key *key) | |
997 | { | |
998 | size_t doff = 0; | |
1568e88a | 999 | static uint32_t seq = 0; |
d62a17ae | 1000 | |
1001 | assert(s && ri && ri->auth_type == RIP_AUTH_MD5); | |
1002 | ||
1003 | /* MD5 authentication. */ | |
1004 | stream_putw(s, RIP_FAMILY_AUTH); | |
1005 | stream_putw(s, RIP_AUTH_MD5); | |
1006 | ||
1007 | /* MD5 AH digest offset field. | |
1008 | * | |
1009 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
1010 | * is known. Actual value is set in .....(). | |
1011 | */ | |
1012 | doff = stream_get_endp(s); | |
1013 | stream_putw(s, 0); | |
1014 | ||
1015 | /* Key ID. */ | |
1016 | if (key) | |
1017 | stream_putc(s, key->index % 256); | |
1018 | else | |
1019 | stream_putc(s, 1); | |
1020 | ||
1021 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds | |
1022 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for | |
1023 | * this | |
1024 | * to be configurable. | |
1025 | */ | |
1026 | stream_putc(s, ri->md5_auth_len); | |
1027 | ||
1028 | /* Sequence Number (non-decreasing). */ | |
1029 | /* RFC2080: The value used in the sequence number is | |
1030 | arbitrary, but two suggestions are the time of the | |
1031 | message's creation or a simple message counter. */ | |
1568e88a | 1032 | stream_putl(s, ++seq); |
d62a17ae | 1033 | |
1034 | /* Reserved field must be zero. */ | |
1035 | stream_putl(s, 0); | |
1036 | stream_putl(s, 0); | |
1037 | ||
1038 | return doff; | |
b14ee00b | 1039 | } |
1040 | ||
1041 | /* If authentication is in used, write the appropriate header | |
1042 | * returns stream offset to which length must later be written | |
1043 | * or 0 if this is not required | |
1044 | */ | |
d62a17ae | 1045 | static size_t rip_auth_header_write(struct stream *s, struct rip_interface *ri, |
1046 | struct key *key, char *auth_str, int len) | |
1047 | { | |
1048 | assert(ri->auth_type != RIP_NO_AUTH); | |
1049 | ||
1050 | switch (ri->auth_type) { | |
1051 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1052 | rip_auth_prepare_str_send(ri, key, auth_str, len); | |
1053 | rip_auth_simple_write(s, auth_str, len); | |
1054 | return 0; | |
1055 | case RIP_AUTH_MD5: | |
1056 | return rip_auth_md5_ah_write(s, ri, key); | |
1057 | } | |
1058 | assert(1); | |
1059 | return 0; | |
b14ee00b | 1060 | } |
1061 | ||
1062 | /* Write RIPv2 MD5 authentication data trailer */ | |
d62a17ae | 1063 | static void rip_auth_md5_set(struct stream *s, struct rip_interface *ri, |
1064 | size_t doff, char *auth_str, int authlen) | |
1065 | { | |
1066 | unsigned long len; | |
0513a271 MR |
1067 | #ifdef CRYPTO_OPENSSL |
1068 | EVP_MD_CTX *ctx; | |
1069 | #elif CRYPTO_INTERNAL | |
d62a17ae | 1070 | MD5_CTX ctx; |
0513a271 | 1071 | #endif |
d62a17ae | 1072 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
1073 | ||
1074 | /* Make it sure this interface is configured as MD5 | |
1075 | authentication. */ | |
1076 | assert((ri->auth_type == RIP_AUTH_MD5) | |
1077 | && (authlen == RIP_AUTH_MD5_SIZE)); | |
1078 | assert(doff > 0); | |
1079 | ||
1080 | /* Get packet length. */ | |
1081 | len = stream_get_endp(s); | |
1082 | ||
1083 | /* Check packet length. */ | |
1084 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) { | |
99404729 | 1085 | flog_err(EC_RIP_PACKET, |
1086 | "%s: packet length %ld is less than minimum length.", | |
1087 | __func__, len); | |
d62a17ae | 1088 | return; |
1089 | } | |
1090 | ||
1091 | /* Set the digest offset length in the header */ | |
1092 | stream_putw_at(s, doff, len); | |
1093 | ||
1094 | /* Set authentication data. */ | |
1095 | stream_putw(s, RIP_FAMILY_AUTH); | |
1096 | stream_putw(s, RIP_AUTH_DATA); | |
1097 | ||
1098 | /* Generate a digest for the RIP packet. */ | |
0513a271 MR |
1099 | #ifdef CRYPTO_OPENSSL |
1100 | unsigned int md5_size = RIP_AUTH_MD5_SIZE; | |
1101 | ctx = EVP_MD_CTX_new(); | |
1102 | EVP_DigestInit(ctx, EVP_md5()); | |
1103 | EVP_DigestUpdate(ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1104 | EVP_DigestUpdate(ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1105 | EVP_DigestFinal(ctx, digest, &md5_size); | |
1106 | EVP_MD_CTX_free(ctx); | |
1107 | #elif CRYPTO_INTERNAL | |
d62a17ae | 1108 | memset(&ctx, 0, sizeof(ctx)); |
1109 | MD5Init(&ctx); | |
1110 | MD5Update(&ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1111 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1112 | MD5Final(digest, &ctx); | |
0513a271 | 1113 | #endif |
d62a17ae | 1114 | |
1115 | /* Copy the digest to the packet. */ | |
1116 | stream_write(s, digest, RIP_AUTH_MD5_SIZE); | |
718e3744 | 1117 | } |
1118 | ||
1119 | /* RIP routing information. */ | |
d62a17ae | 1120 | static void rip_response_process(struct rip_packet *packet, int size, |
1121 | struct sockaddr_in *from, | |
1122 | struct connected *ifc) | |
1123 | { | |
045c5389 RW |
1124 | struct rip_interface *ri = ifc->ifp->info; |
1125 | struct rip *rip = ri->rip; | |
d62a17ae | 1126 | caddr_t lim; |
1127 | struct rte *rte; | |
1128 | struct prefix_ipv4 ifaddr; | |
1129 | struct prefix_ipv4 ifaddrclass; | |
1130 | int subnetted; | |
1131 | ||
1132 | memset(&ifaddr, 0, sizeof(ifaddr)); | |
1133 | /* We don't know yet. */ | |
1134 | subnetted = -1; | |
1135 | ||
1136 | /* The Response must be ignored if it is not from the RIP | |
1137 | port. (RFC2453 - Sec. 3.9.2)*/ | |
1138 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) { | |
1139 | zlog_info("response doesn't come from RIP port: %d", | |
1140 | from->sin_port); | |
045c5389 | 1141 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1142 | return; |
718e3744 | 1143 | } |
1144 | ||
d62a17ae | 1145 | /* The datagram's IPv4 source address should be checked to see |
1146 | whether the datagram is from a valid neighbor; the source of the | |
1147 | datagram must be on a directly connected network (RFC2453 - Sec. | |
1148 | 3.9.2) */ | |
ae7b826a RW |
1149 | if (if_lookup_address((void *)&from->sin_addr, AF_INET, |
1150 | rip->vrf->vrf_id) | |
d62a17ae | 1151 | == NULL) { |
1152 | zlog_info( | |
53bb7f9b MS |
1153 | "This datagram doesn't come from a valid neighbor: %pI4", |
1154 | &from->sin_addr); | |
045c5389 | 1155 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1156 | return; |
718e3744 | 1157 | } |
1158 | ||
d62a17ae | 1159 | /* It is also worth checking to see whether the response is from one |
1160 | of the router's own addresses. */ | |
1161 | ||
1162 | ; /* Alredy done in rip_read () */ | |
1163 | ||
1164 | /* Update RIP peer. */ | |
045c5389 | 1165 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1166 | |
1167 | /* Set RTE pointer. */ | |
1168 | rte = packet->rte; | |
1169 | ||
1170 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
1171 | /* RIPv2 authentication check. */ | |
1172 | /* If the Address Family Identifier of the first (and only the | |
1173 | first) entry in the message is 0xFFFF, then the remainder of | |
1174 | the entry contains the authentication. */ | |
1175 | /* If the packet gets here it means authentication enabled */ | |
1176 | /* Check is done in rip_read(). So, just skipping it */ | |
1177 | if (packet->version == RIPv2 && rte == packet->rte | |
1178 | && rte->family == htons(RIP_FAMILY_AUTH)) | |
1179 | continue; | |
1180 | ||
1181 | if (rte->family != htons(AF_INET)) { | |
1182 | /* Address family check. RIP only supports AF_INET. */ | |
53bb7f9b | 1183 | zlog_info("Unsupported family %d from %pI4", |
d62a17ae | 1184 | ntohs(rte->family), |
53bb7f9b | 1185 | &from->sin_addr); |
d62a17ae | 1186 | continue; |
718e3744 | 1187 | } |
d62a17ae | 1188 | |
1189 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1190 | or 127) */ | |
1191 | if (!rip_destination_check(rte->prefix)) { | |
1192 | zlog_info( | |
1193 | "Network is net 0 or net 127 or it is not unicast network"); | |
045c5389 | 1194 | rip_peer_bad_route(rip, from); |
d62a17ae | 1195 | continue; |
718e3744 | 1196 | } |
1197 | ||
d62a17ae | 1198 | /* Convert metric value to host byte order. */ |
1199 | rte->metric = ntohl(rte->metric); | |
718e3744 | 1200 | |
d62a17ae | 1201 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1202 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
1203 | zlog_info("Route's metric is not in the 1-16 range."); | |
045c5389 | 1204 | rip_peer_bad_route(rip, from); |
d62a17ae | 1205 | continue; |
1206 | } | |
718e3744 | 1207 | |
d62a17ae | 1208 | /* RIPv1 does not have nexthop value. */ |
975a328e DA |
1209 | if (packet->version == RIPv1 |
1210 | && rte->nexthop.s_addr != INADDR_ANY) { | |
53bb7f9b MS |
1211 | zlog_info("RIPv1 packet with nexthop value %pI4", |
1212 | &rte->nexthop); | |
045c5389 | 1213 | rip_peer_bad_route(rip, from); |
d62a17ae | 1214 | continue; |
1215 | } | |
718e3744 | 1216 | |
d62a17ae | 1217 | /* That is, if the provided information is ignored, a possibly |
1218 | sub-optimal, but absolutely valid, route may be taken. If | |
1219 | the received Next Hop is not directly reachable, it should be | |
1220 | treated as 0.0.0.0. */ | |
975a328e DA |
1221 | if (packet->version == RIPv2 |
1222 | && rte->nexthop.s_addr != INADDR_ANY) { | |
d7c0a89a | 1223 | uint32_t addrval; |
d62a17ae | 1224 | |
1225 | /* Multicast address check. */ | |
1226 | addrval = ntohl(rte->nexthop.s_addr); | |
1227 | if (IN_CLASSD(addrval)) { | |
1228 | zlog_info( | |
53bb7f9b MS |
1229 | "Nexthop %pI4 is multicast address, skip this rte", |
1230 | &rte->nexthop); | |
d62a17ae | 1231 | continue; |
1232 | } | |
1233 | ||
1234 | if (!if_lookup_address((void *)&rte->nexthop, AF_INET, | |
ae7b826a | 1235 | rip->vrf->vrf_id)) { |
d62a17ae | 1236 | struct route_node *rn; |
1237 | struct rip_info *rinfo; | |
1238 | ||
1239 | rn = route_node_match_ipv4(rip->table, | |
1240 | &rte->nexthop); | |
1241 | ||
1242 | if (rn) { | |
1243 | rinfo = rn->info; | |
1244 | ||
1245 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1246 | && rinfo->sub_type | |
1247 | == RIP_ROUTE_RTE) { | |
1248 | if (IS_RIP_DEBUG_EVENT) | |
1249 | zlog_debug( | |
53bb7f9b MS |
1250 | "Next hop %pI4 is on RIP network. Set nexthop to the packet's originator", |
1251 | &rte->nexthop); | |
d62a17ae | 1252 | rte->nexthop = rinfo->from; |
1253 | } else { | |
1254 | if (IS_RIP_DEBUG_EVENT) | |
1255 | zlog_debug( | |
53bb7f9b MS |
1256 | "Next hop %pI4 is not directly reachable. Treat it as 0.0.0.0", |
1257 | &rte->nexthop); | |
975a328e DA |
1258 | rte->nexthop.s_addr = |
1259 | INADDR_ANY; | |
d62a17ae | 1260 | } |
1261 | ||
1262 | route_unlock_node(rn); | |
1263 | } else { | |
1264 | if (IS_RIP_DEBUG_EVENT) | |
1265 | zlog_debug( | |
53bb7f9b MS |
1266 | "Next hop %pI4 is not directly reachable. Treat it as 0.0.0.0", |
1267 | &rte->nexthop); | |
975a328e | 1268 | rte->nexthop.s_addr = INADDR_ANY; |
d62a17ae | 1269 | } |
1270 | } | |
1271 | } | |
718e3744 | 1272 | |
d62a17ae | 1273 | /* For RIPv1, there won't be a valid netmask. |
91b508dc DS |
1274 | * This is a best guess at the masks. If everyone was using old |
1275 | * Ciscos before the 'ip subnet zero' option, it would be almost | |
1276 | * right too :-) | |
1277 | * | |
1278 | * Cisco summarize ripv1 advertisements to the classful boundary | |
1279 | * (/16 for class B's) except when the RIP packet does to inside | |
1280 | * the classful network in question. | |
1281 | */ | |
975a328e DA |
1282 | if ((packet->version == RIPv1 |
1283 | && rte->prefix.s_addr != INADDR_ANY) | |
d62a17ae | 1284 | || (packet->version == RIPv2 |
975a328e DA |
1285 | && (rte->prefix.s_addr != INADDR_ANY |
1286 | && rte->mask.s_addr == INADDR_ANY))) { | |
d7c0a89a | 1287 | uint32_t destination; |
d62a17ae | 1288 | |
1289 | if (subnetted == -1) { | |
f51eeb86 | 1290 | memcpy(&ifaddr, ifc->address, sizeof(ifaddr)); |
d62a17ae | 1291 | memcpy(&ifaddrclass, &ifaddr, |
f51eeb86 | 1292 | sizeof(ifaddrclass)); |
d62a17ae | 1293 | apply_classful_mask_ipv4(&ifaddrclass); |
1294 | subnetted = 0; | |
1295 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1296 | subnetted = 1; | |
1297 | } | |
1298 | ||
1299 | destination = ntohl(rte->prefix.s_addr); | |
1300 | ||
1301 | if (IN_CLASSA(destination)) | |
1302 | masklen2ip(8, &rte->mask); | |
1303 | else if (IN_CLASSB(destination)) | |
1304 | masklen2ip(16, &rte->mask); | |
1305 | else if (IN_CLASSC(destination)) | |
1306 | masklen2ip(24, &rte->mask); | |
1307 | ||
1308 | if (subnetted == 1) | |
1309 | masklen2ip(ifaddrclass.prefixlen, | |
1310 | (struct in_addr *)&destination); | |
1311 | if ((subnetted == 1) | |
1312 | && ((rte->prefix.s_addr & destination) | |
1313 | == ifaddrclass.prefix.s_addr)) { | |
1314 | masklen2ip(ifaddr.prefixlen, &rte->mask); | |
1315 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1316 | != rte->prefix.s_addr) | |
1317 | masklen2ip(32, &rte->mask); | |
1318 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
1319 | zlog_debug("Subnetted route %pI4", |
1320 | &rte->prefix); | |
d62a17ae | 1321 | } else { |
1322 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1323 | != rte->prefix.s_addr) | |
1324 | continue; | |
1325 | } | |
1326 | ||
1327 | if (IS_RIP_DEBUG_EVENT) { | |
53bb7f9b MS |
1328 | zlog_debug("Resultant route %pI4", |
1329 | &rte->prefix); | |
1330 | zlog_debug("Resultant mask %pI4", | |
1331 | &rte->mask); | |
d62a17ae | 1332 | } |
1333 | } | |
1334 | ||
1335 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1336 | ignore the entry. */ | |
975a328e DA |
1337 | if ((packet->version == RIPv2) |
1338 | && (rte->mask.s_addr != INADDR_ANY) | |
d62a17ae | 1339 | && ((rte->prefix.s_addr & rte->mask.s_addr) |
1340 | != rte->prefix.s_addr)) { | |
1341 | zlog_warn( | |
53bb7f9b MS |
1342 | "RIPv2 address %pI4 is not mask /%d applied one", |
1343 | &rte->prefix, ip_masklen(rte->mask)); | |
045c5389 | 1344 | rip_peer_bad_route(rip, from); |
d62a17ae | 1345 | continue; |
1346 | } | |
1347 | ||
1348 | /* Default route's netmask is ignored. */ | |
975a328e DA |
1349 | if (packet->version == RIPv2 |
1350 | && (rte->prefix.s_addr == INADDR_ANY) | |
1351 | && (rte->mask.s_addr != INADDR_ANY)) { | |
d62a17ae | 1352 | if (IS_RIP_DEBUG_EVENT) |
1353 | zlog_debug( | |
1354 | "Default route with non-zero netmask. Set zero to netmask"); | |
975a328e | 1355 | rte->mask.s_addr = INADDR_ANY; |
d62a17ae | 1356 | } |
1357 | ||
1358 | /* Routing table updates. */ | |
1359 | rip_rte_process(rte, from, ifc->ifp); | |
718e3744 | 1360 | } |
718e3744 | 1361 | } |
1362 | ||
a4e987e0 | 1363 | /* Make socket for RIP protocol. */ |
ae7b826a | 1364 | int rip_create_socket(struct vrf *vrf) |
d62a17ae | 1365 | { |
1366 | int ret; | |
1367 | int sock; | |
1368 | struct sockaddr_in addr; | |
ae7b826a | 1369 | const char *vrf_dev = NULL; |
d62a17ae | 1370 | |
1371 | memset(&addr, 0, sizeof(struct sockaddr_in)); | |
1372 | addr.sin_family = AF_INET; | |
1373 | addr.sin_addr.s_addr = INADDR_ANY; | |
6f0e3f6e | 1374 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1375 | addr.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1376 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
d62a17ae | 1377 | /* sending port must always be the RIP port */ |
1378 | addr.sin_port = htons(RIP_PORT_DEFAULT); | |
1379 | ||
1380 | /* Make datagram socket. */ | |
ae7b826a RW |
1381 | if (vrf->vrf_id != VRF_DEFAULT) |
1382 | vrf_dev = vrf->name; | |
0cf6db21 | 1383 | frr_with_privs(&ripd_privs) { |
ae7b826a RW |
1384 | sock = vrf_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, vrf->vrf_id, |
1385 | vrf_dev); | |
1386 | if (sock < 0) { | |
1387 | flog_err_sys(EC_LIB_SOCKET, | |
1388 | "Cannot create UDP socket: %s", | |
1389 | safe_strerror(errno)); | |
1390 | return -1; | |
1391 | } | |
d62a17ae | 1392 | } |
1393 | ||
1394 | sockopt_broadcast(sock); | |
1395 | sockopt_reuseaddr(sock); | |
1396 | sockopt_reuseport(sock); | |
1397 | setsockopt_ipv4_multicast_loop(sock, 0); | |
78b31d5c | 1398 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 1399 | setsockopt_ipv4_tos(sock, IPTOS_PREC_INTERNETCONTROL); |
78b31d5c | 1400 | #endif |
338b8e91 | 1401 | setsockopt_so_recvbuf(sock, RIP_UDP_RCV_BUF); |
a4e987e0 | 1402 | |
0cf6db21 | 1403 | frr_with_privs(&ripd_privs) { |
633fc9b1 DL |
1404 | if ((ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr))) |
1405 | < 0) { | |
53bb7f9b MS |
1406 | zlog_err("%s: Can't bind socket %d to %pI4 port %d: %s", |
1407 | __func__, sock, &addr.sin_addr, | |
633fc9b1 DL |
1408 | (int)ntohs(addr.sin_port), |
1409 | safe_strerror(errno)); | |
d62a17ae | 1410 | |
01b9e3fd DL |
1411 | close(sock); |
1412 | return ret; | |
1413 | } | |
01b9e3fd | 1414 | } |
d62a17ae | 1415 | |
1416 | return sock; | |
a4e987e0 | 1417 | } |
1418 | ||
c49ad8f1 | 1419 | /* RIP packet send to destination address, on interface denoted by |
1420 | * by connected argument. NULL to argument denotes destination should be | |
1421 | * should be RIP multicast group | |
1422 | */ | |
d7c0a89a | 1423 | static int rip_send_packet(uint8_t *buf, int size, struct sockaddr_in *to, |
d62a17ae | 1424 | struct connected *ifc) |
1425 | { | |
045c5389 RW |
1426 | struct rip_interface *ri; |
1427 | struct rip *rip; | |
d62a17ae | 1428 | int ret; |
1429 | struct sockaddr_in sin; | |
e35356af RW |
1430 | struct msghdr msg; |
1431 | struct iovec iov; | |
1432 | #ifdef GNU_LINUX | |
1433 | struct cmsghdr *cmsgptr; | |
1434 | char adata[256] = {}; | |
1435 | struct in_pktinfo *pkt; | |
1436 | #endif /* GNU_LINUX */ | |
d62a17ae | 1437 | |
1438 | assert(ifc != NULL); | |
045c5389 RW |
1439 | ri = ifc->ifp->info; |
1440 | rip = ri->rip; | |
d62a17ae | 1441 | |
1442 | if (IS_RIP_DEBUG_PACKET) { | |
f69bd9da | 1443 | #define ADDRESS_SIZE 20 |
d62a17ae | 1444 | char dst[ADDRESS_SIZE]; |
d62a17ae | 1445 | |
1446 | if (to) { | |
53bb7f9b | 1447 | inet_ntop(AF_INET, &to->sin_addr, dst, sizeof(dst)); |
d62a17ae | 1448 | } else { |
1449 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
53bb7f9b | 1450 | inet_ntop(AF_INET, &sin.sin_addr, dst, sizeof(dst)); |
d62a17ae | 1451 | } |
f69bd9da | 1452 | #undef ADDRESS_SIZE |
99404729 | 1453 | zlog_debug("%s %pI4 > %s (%s)", __func__, |
1454 | &ifc->address->u.prefix4, dst, ifc->ifp->name); | |
d62a17ae | 1455 | } |
1456 | ||
1457 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) { | |
1458 | /* | |
1459 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is | |
91b508dc DS |
1460 | * configured with multiple addresses on the same |
1461 | * subnet: the first address on the subnet is configured | |
1462 | * "primary", and all subsequent addresses on that subnet | |
1463 | * are treated as "secondary" addresses. In order to avoid | |
1464 | * routing-table bloat on other rip listeners, we do not send | |
1465 | * out RIP packets with ZEBRA_IFA_SECONDARY source addrs. | |
d62a17ae | 1466 | * XXX Since Linux is the only system for which the |
91b508dc DS |
1467 | * ZEBRA_IFA_SECONDARY flag is set, we would end up |
1468 | * sending a packet for a "secondary" source address on | |
1469 | * non-linux systems. | |
d62a17ae | 1470 | */ |
1471 | if (IS_RIP_DEBUG_PACKET) | |
1472 | zlog_debug("duplicate dropped"); | |
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | /* Make destination address. */ | |
6006b807 | 1477 | memset(&sin, 0, sizeof(sin)); |
d62a17ae | 1478 | sin.sin_family = AF_INET; |
6f0e3f6e | 1479 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1480 | sin.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1481 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 1482 | |
d62a17ae | 1483 | /* When destination is specified, use it's port and address. */ |
1484 | if (to) { | |
1485 | sin.sin_port = to->sin_port; | |
1486 | sin.sin_addr = to->sin_addr; | |
1487 | } else { | |
1488 | sin.sin_port = htons(RIP_PORT_DEFAULT); | |
1489 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
ae735d2d | 1490 | |
d62a17ae | 1491 | rip_interface_multicast_set(rip->sock, ifc); |
1492 | } | |
718e3744 | 1493 | |
e35356af RW |
1494 | memset(&msg, 0, sizeof(msg)); |
1495 | msg.msg_name = (void *)&sin; | |
1496 | msg.msg_namelen = sizeof(struct sockaddr_in); | |
1497 | msg.msg_iov = &iov; | |
1498 | msg.msg_iovlen = 1; | |
1499 | iov.iov_base = buf; | |
1500 | iov.iov_len = size; | |
1501 | ||
1502 | #ifdef GNU_LINUX | |
1503 | msg.msg_control = (void *)adata; | |
1504 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in_pktinfo)); | |
1505 | ||
1506 | cmsgptr = (struct cmsghdr *)adata; | |
1507 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); | |
1508 | cmsgptr->cmsg_level = IPPROTO_IP; | |
1509 | cmsgptr->cmsg_type = IP_PKTINFO; | |
1510 | pkt = (struct in_pktinfo *)CMSG_DATA(cmsgptr); | |
1511 | pkt->ipi_ifindex = ifc->ifp->ifindex; | |
114918bd | 1512 | pkt->ipi_spec_dst.s_addr = ifc->address->u.prefix4.s_addr; |
e35356af RW |
1513 | #endif /* GNU_LINUX */ |
1514 | ||
1515 | ret = sendmsg(rip->sock, &msg, 0); | |
718e3744 | 1516 | |
d62a17ae | 1517 | if (IS_RIP_DEBUG_EVENT) |
53bb7f9b | 1518 | zlog_debug("SEND to %pI4%d", &sin.sin_addr, |
d62a17ae | 1519 | ntohs(sin.sin_port)); |
718e3744 | 1520 | |
d62a17ae | 1521 | if (ret < 0) |
1522 | zlog_warn("can't send packet : %s", safe_strerror(errno)); | |
718e3744 | 1523 | |
d62a17ae | 1524 | return ret; |
718e3744 | 1525 | } |
1526 | ||
1527 | /* Add redistributed route to RIP table. */ | |
045c5389 RW |
1528 | void rip_redistribute_add(struct rip *rip, int type, int sub_type, |
1529 | struct prefix_ipv4 *p, struct nexthop *nh, | |
1530 | unsigned int metric, unsigned char distance, | |
1531 | route_tag_t tag) | |
d62a17ae | 1532 | { |
1533 | int ret; | |
1534 | struct route_node *rp = NULL; | |
1535 | struct rip_info *rinfo = NULL, newinfo; | |
1536 | struct list *list = NULL; | |
1537 | ||
1538 | /* Redistribute route */ | |
1539 | ret = rip_destination_check(p->prefix); | |
1540 | if (!ret) | |
1541 | return; | |
1542 | ||
1543 | rp = route_node_get(rip->table, (struct prefix *)p); | |
1544 | ||
6006b807 | 1545 | memset(&newinfo, 0, sizeof(newinfo)); |
d62a17ae | 1546 | newinfo.type = type; |
1547 | newinfo.sub_type = sub_type; | |
d62a17ae | 1548 | newinfo.metric = 1; |
1549 | newinfo.external_metric = metric; | |
1550 | newinfo.distance = distance; | |
1551 | if (tag <= UINT16_MAX) /* RIP only supports 16 bit tags */ | |
1552 | newinfo.tag = tag; | |
1553 | newinfo.rp = rp; | |
3f5682c8 | 1554 | newinfo.nh = *nh; |
d62a17ae | 1555 | |
1556 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
1557 | rinfo = listgetdata(listhead(list)); | |
1558 | ||
1559 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
1560 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1561 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
1562 | route_unlock_node(rp); | |
1563 | return; | |
1564 | } | |
718e3744 | 1565 | |
d62a17ae | 1566 | /* Manually configured RIP route check. */ |
1567 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1568 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
1569 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT))) { | |
1570 | if (type != ZEBRA_ROUTE_RIP | |
1571 | || ((sub_type != RIP_ROUTE_STATIC) | |
1572 | && (sub_type != RIP_ROUTE_DEFAULT))) { | |
1573 | route_unlock_node(rp); | |
1574 | return; | |
1575 | } | |
1576 | } | |
1577 | ||
045c5389 | 1578 | (void)rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 1579 | route_unlock_node(rp); |
1580 | } else | |
045c5389 | 1581 | (void)rip_ecmp_add(rip, &newinfo); |
d62a17ae | 1582 | |
1583 | if (IS_RIP_DEBUG_EVENT) { | |
f42238f8 | 1584 | zlog_debug("Redistribute new prefix %pFX", p); |
718e3744 | 1585 | } |
1586 | ||
045c5389 | 1587 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 1588 | } |
1589 | ||
1590 | /* Delete redistributed route from RIP table. */ | |
045c5389 RW |
1591 | void rip_redistribute_delete(struct rip *rip, int type, int sub_type, |
1592 | struct prefix_ipv4 *p, ifindex_t ifindex) | |
d62a17ae | 1593 | { |
1594 | int ret; | |
1595 | struct route_node *rp; | |
1596 | struct rip_info *rinfo; | |
1597 | ||
1598 | ret = rip_destination_check(p->prefix); | |
1599 | if (!ret) | |
1600 | return; | |
1601 | ||
1602 | rp = route_node_lookup(rip->table, (struct prefix *)p); | |
1603 | if (rp) { | |
1604 | struct list *list = rp->info; | |
1605 | ||
1606 | if (list != NULL && listcount(list) != 0) { | |
1607 | rinfo = listgetdata(listhead(list)); | |
1608 | if (rinfo != NULL && rinfo->type == type | |
1609 | && rinfo->sub_type == sub_type | |
dd127197 | 1610 | && rinfo->nh.ifindex == ifindex) { |
d62a17ae | 1611 | /* Perform poisoned reverse. */ |
1612 | rinfo->metric = RIP_METRIC_INFINITY; | |
1613 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
1614 | rip_garbage_collect, | |
1615 | rip->garbage_time); | |
580e37a3 | 1616 | THREAD_OFF(rinfo->t_timeout); |
d62a17ae | 1617 | rinfo->flags |= RIP_RTF_CHANGED; |
1618 | ||
1619 | if (IS_RIP_DEBUG_EVENT) | |
1620 | zlog_debug( | |
f42238f8 DS |
1621 | "Poison %pFX on the interface %s with an infinity metric [delete]", |
1622 | p, | |
ae7b826a RW |
1623 | ifindex2ifname( |
1624 | ifindex, | |
1625 | rip->vrf->vrf_id)); | |
d62a17ae | 1626 | |
045c5389 | 1627 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 1628 | } |
1629 | } | |
1630 | route_unlock_node(rp); | |
1631 | } | |
718e3744 | 1632 | } |
1633 | ||
1634 | /* Response to request called from rip_read ().*/ | |
d62a17ae | 1635 | static void rip_request_process(struct rip_packet *packet, int size, |
1636 | struct sockaddr_in *from, struct connected *ifc) | |
1637 | { | |
045c5389 | 1638 | struct rip *rip; |
d62a17ae | 1639 | caddr_t lim; |
1640 | struct rte *rte; | |
1641 | struct prefix_ipv4 p; | |
1642 | struct route_node *rp; | |
1643 | struct rip_info *rinfo; | |
1644 | struct rip_interface *ri; | |
1645 | ||
1646 | /* Does not reponse to the requests on the loopback interfaces */ | |
1647 | if (if_is_loopback(ifc->ifp)) | |
1648 | return; | |
1649 | ||
1650 | /* Check RIP process is enabled on this interface. */ | |
1651 | ri = ifc->ifp->info; | |
1652 | if (!ri->running) | |
1653 | return; | |
045c5389 | 1654 | rip = ri->rip; |
d62a17ae | 1655 | |
1656 | /* When passive interface is specified, suppress responses */ | |
1657 | if (ri->passive) | |
1658 | return; | |
1659 | ||
1660 | /* RIP peer update. */ | |
045c5389 | 1661 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1662 | |
1663 | lim = ((caddr_t)packet) + size; | |
1664 | rte = packet->rte; | |
1665 | ||
1666 | /* The Request is processed entry by entry. If there are no | |
1667 | entries, no response is given. */ | |
1668 | if (lim == (caddr_t)rte) | |
1669 | return; | |
1670 | ||
1671 | /* There is one special case. If there is exactly one entry in the | |
1672 | request, and it has an address family identifier of zero and a | |
1673 | metric of infinity (i.e., 16), then this is a request to send the | |
1674 | entire routing table. */ | |
1675 | if (lim == ((caddr_t)(rte + 1)) && ntohs(rte->family) == 0 | |
1676 | && ntohl(rte->metric) == RIP_METRIC_INFINITY) { | |
1677 | /* All route with split horizon */ | |
1678 | rip_output_process(ifc, from, rip_all_route, packet->version); | |
1679 | } else { | |
1680 | if (ntohs(rte->family) != AF_INET) | |
1681 | return; | |
1682 | ||
1683 | /* Examine the list of RTEs in the Request one by one. For each | |
1684 | entry, look up the destination in the router's routing | |
1685 | database and, if there is a route, put that route's metric in | |
1686 | the metric field of the RTE. If there is no explicit route | |
1687 | to the specified destination, put infinity in the metric | |
1688 | field. Once all the entries have been filled in, change the | |
1689 | command from Request to Response and send the datagram back | |
1690 | to the requestor. */ | |
1691 | p.family = AF_INET; | |
1692 | ||
1693 | for (; ((caddr_t)rte) < lim; rte++) { | |
1694 | p.prefix = rte->prefix; | |
1695 | p.prefixlen = ip_masklen(rte->mask); | |
1696 | apply_mask_ipv4(&p); | |
1697 | ||
1698 | rp = route_node_lookup(rip->table, (struct prefix *)&p); | |
1699 | if (rp) { | |
1700 | rinfo = listgetdata( | |
1701 | listhead((struct list *)rp->info)); | |
1702 | rte->metric = htonl(rinfo->metric); | |
1703 | route_unlock_node(rp); | |
1704 | } else | |
1705 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
1706 | } | |
1707 | packet->command = RIP_RESPONSE; | |
4e054866 | 1708 | |
b2608623 | 1709 | (void)rip_send_packet((uint8_t *)packet, size, from, ifc); |
d62a17ae | 1710 | } |
c08a2107 | 1711 | rip->counters.queries++; |
718e3744 | 1712 | } |
1713 | ||
718e3744 | 1714 | /* First entry point of RIP packet. */ |
cc9f21da | 1715 | static void rip_read(struct thread *t) |
d62a17ae | 1716 | { |
045c5389 | 1717 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 1718 | int sock; |
1719 | int ret; | |
1720 | int rtenum; | |
1721 | union rip_buf rip_buf; | |
1722 | struct rip_packet *packet; | |
1723 | struct sockaddr_in from; | |
1724 | int len; | |
1725 | int vrecv; | |
1726 | socklen_t fromlen; | |
1727 | struct interface *ifp = NULL; | |
1728 | struct connected *ifc; | |
1729 | struct rip_interface *ri; | |
1730 | struct prefix p; | |
1731 | ||
1732 | /* Fetch socket then register myself. */ | |
1733 | sock = THREAD_FD(t); | |
d62a17ae | 1734 | |
1735 | /* Add myself to tne next event */ | |
045c5389 | 1736 | rip_event(rip, RIP_READ, sock); |
d62a17ae | 1737 | |
1738 | /* RIPd manages only IPv4. */ | |
6006b807 | 1739 | memset(&from, 0, sizeof(from)); |
d62a17ae | 1740 | fromlen = sizeof(struct sockaddr_in); |
1741 | ||
1742 | len = recvfrom(sock, (char *)&rip_buf.buf, sizeof(rip_buf.buf), 0, | |
1743 | (struct sockaddr *)&from, &fromlen); | |
1744 | if (len < 0) { | |
ae7b826a RW |
1745 | zlog_info("recvfrom failed (VRF %s): %s", rip->vrf_name, |
1746 | safe_strerror(errno)); | |
cc9f21da | 1747 | return; |
d62a17ae | 1748 | } |
1749 | ||
1750 | /* Check is this packet comming from myself? */ | |
045c5389 | 1751 | if (if_check_address(rip, from.sin_addr)) { |
d62a17ae | 1752 | if (IS_RIP_DEBUG_PACKET) |
ae7b826a RW |
1753 | zlog_debug("ignore packet comes from myself (VRF %s)", |
1754 | rip->vrf_name); | |
cc9f21da | 1755 | return; |
d62a17ae | 1756 | } |
1757 | ||
1758 | /* Which interface is this packet comes from. */ | |
ae7b826a RW |
1759 | ifc = if_lookup_address((void *)&from.sin_addr, AF_INET, |
1760 | rip->vrf->vrf_id); | |
d62a17ae | 1761 | if (ifc) |
1762 | ifp = ifc->ifp; | |
1763 | ||
1764 | /* RIP packet received */ | |
1765 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
1766 | zlog_debug("RECV packet from %pI4 port %d on %s (VRF %s)", |
1767 | &from.sin_addr, ntohs(from.sin_port), | |
ae7b826a | 1768 | ifp ? ifp->name : "unknown", rip->vrf_name); |
d62a17ae | 1769 | |
1770 | /* If this packet come from unknown interface, ignore it. */ | |
1771 | if (ifp == NULL) { | |
1772 | zlog_info( | |
99404729 | 1773 | "%s: cannot find interface for packet from %pI4 port %d (VRF %s)", |
1774 | __func__, &from.sin_addr, ntohs(from.sin_port), | |
ae7b826a | 1775 | rip->vrf_name); |
cc9f21da | 1776 | return; |
d62a17ae | 1777 | } |
1778 | ||
1779 | p.family = AF_INET; | |
1780 | p.u.prefix4 = from.sin_addr; | |
1781 | p.prefixlen = IPV4_MAX_BITLEN; | |
1782 | ||
1783 | ifc = connected_lookup_prefix(ifp, &p); | |
1784 | ||
1785 | if (ifc == NULL) { | |
1786 | zlog_info( | |
99404729 | 1787 | "%s: cannot find connected address for packet from %pI4 port %d on interface %s (VRF %s)", |
1788 | __func__, &from.sin_addr, ntohs(from.sin_port), | |
ae7b826a | 1789 | ifp->name, rip->vrf_name); |
cc9f21da | 1790 | return; |
d62a17ae | 1791 | } |
1792 | ||
1793 | /* Packet length check. */ | |
1794 | if (len < RIP_PACKET_MINSIZ) { | |
1795 | zlog_warn("packet size %d is smaller than minimum size %d", len, | |
1796 | RIP_PACKET_MINSIZ); | |
045c5389 | 1797 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1798 | return; |
d62a17ae | 1799 | } |
1800 | if (len > RIP_PACKET_MAXSIZ) { | |
1801 | zlog_warn("packet size %d is larger than max size %d", len, | |
1802 | RIP_PACKET_MAXSIZ); | |
045c5389 | 1803 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1804 | return; |
d62a17ae | 1805 | } |
1806 | ||
1807 | /* Packet alignment check. */ | |
1808 | if ((len - RIP_PACKET_MINSIZ) % 20) { | |
1809 | zlog_warn("packet size %d is wrong for RIP packet alignment", | |
1810 | len); | |
045c5389 | 1811 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1812 | return; |
d62a17ae | 1813 | } |
1814 | ||
1815 | /* Set RTE number. */ | |
1816 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1817 | ||
1818 | /* For easy to handle. */ | |
1819 | packet = &rip_buf.rip_packet; | |
1820 | ||
1821 | /* RIP version check. */ | |
1822 | if (packet->version == 0) { | |
1823 | zlog_info("version 0 with command %d received.", | |
1824 | packet->command); | |
045c5389 | 1825 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1826 | return; |
d62a17ae | 1827 | } |
1828 | ||
1829 | /* Dump RIP packet. */ | |
1830 | if (IS_RIP_DEBUG_RECV) | |
1831 | rip_packet_dump(packet, len, "RECV"); | |
1832 | ||
1833 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1834 | that "Version 1 implementations are to ignore this extra data and | |
1835 | process only the fields specified in this document.". So RIPv3 | |
1836 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1837 | if (packet->version > RIPv2) | |
1838 | packet->version = RIPv2; | |
1839 | ||
1840 | /* Is RIP running or is this RIP neighbor ?*/ | |
1841 | ri = ifp->info; | |
045c5389 | 1842 | if (!ri->running && !rip_neighbor_lookup(rip, &from)) { |
d62a17ae | 1843 | if (IS_RIP_DEBUG_EVENT) |
1844 | zlog_debug("RIP is not enabled on interface %s.", | |
1845 | ifp->name); | |
045c5389 | 1846 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1847 | return; |
d62a17ae | 1848 | } |
1849 | ||
1850 | /* RIP Version check. RFC2453, 4.6 and 5.1 */ | |
1851 | vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? rip->version_recv | |
1852 | : ri->ri_receive); | |
1853 | if (vrecv == RI_RIP_VERSION_NONE | |
1854 | || ((packet->version == RIPv1) && !(vrecv & RIPv1)) | |
1855 | || ((packet->version == RIPv2) && !(vrecv & RIPv2))) { | |
1856 | if (IS_RIP_DEBUG_PACKET) | |
1857 | zlog_debug( | |
1858 | " packet's v%d doesn't fit to if version spec", | |
1859 | packet->version); | |
045c5389 | 1860 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1861 | return; |
d62a17ae | 1862 | } |
1863 | ||
1864 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 | |
1865 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
1866 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
1867 | if ((ri->auth_type == RIP_NO_AUTH) && rtenum | |
1868 | && (packet->version == RIPv2) | |
1869 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) { | |
1870 | if (IS_RIP_DEBUG_EVENT) | |
1871 | zlog_debug( | |
1872 | "packet RIPv%d is dropped because authentication disabled", | |
1873 | packet->version); | |
fe339c95 | 1874 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1875 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1876 | return; |
d62a17ae | 1877 | } |
1878 | ||
1879 | /* RFC: | |
1880 | If the router is configured to authenticate RIP-2 messages, then | |
1881 | RIP-1 messages and RIP-2 messages which pass authentication | |
1882 | testing shall be accepted; unauthenticated and failed | |
1883 | authentication RIP-2 messages shall be discarded. For maximum | |
1884 | security, RIP-1 messages should be ignored when authentication is | |
1885 | in use (see section 4.1); otherwise, the routing information from | |
1886 | authenticated messages will be propagated by RIP-1 routers in an | |
1887 | unauthenticated manner. | |
1888 | */ | |
1889 | /* We make an exception for RIPv1 REQUEST packets, to which we'll | |
1890 | * always reply regardless of authentication settings, because: | |
1891 | * | |
1892 | * - if there other authorised routers on-link, the REQUESTor can | |
1893 | * passively obtain the routing updates anyway | |
1894 | * - if there are no other authorised routers on-link, RIP can | |
1895 | * easily be disabled for the link to prevent giving out information | |
1896 | * on state of this routers RIP routing table.. | |
1897 | * | |
1898 | * I.e. if RIPv1 has any place anymore these days, it's as a very | |
1899 | * simple way to distribute routing information (e.g. to embedded | |
1900 | * hosts / appliances) and the ability to give out RIPv1 | |
1901 | * routing-information freely, while still requiring RIPv2 | |
1902 | * authentication for any RESPONSEs might be vaguely useful. | |
1903 | */ | |
1904 | if (ri->auth_type != RIP_NO_AUTH && packet->version == RIPv1) { | |
1905 | /* Discard RIPv1 messages other than REQUESTs */ | |
1906 | if (packet->command != RIP_REQUEST) { | |
1907 | if (IS_RIP_DEBUG_PACKET) | |
1908 | zlog_debug( | |
3efd0893 | 1909 | "RIPv1 dropped because authentication enabled"); |
fe339c95 | 1910 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1911 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1912 | return; |
d62a17ae | 1913 | } |
1914 | } else if (ri->auth_type != RIP_NO_AUTH) { | |
1915 | const char *auth_desc; | |
1916 | ||
1917 | if (rtenum == 0) { | |
1918 | /* There definitely is no authentication in the packet. | |
1919 | */ | |
1920 | if (IS_RIP_DEBUG_PACKET) | |
1921 | zlog_debug( | |
1922 | "RIPv2 authentication failed: no auth RTE in packet"); | |
fe339c95 | 1923 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1924 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1925 | return; |
d62a17ae | 1926 | } |
1927 | ||
1928 | /* First RTE must be an Authentication Family RTE */ | |
1929 | if (packet->rte->family != htons(RIP_FAMILY_AUTH)) { | |
1930 | if (IS_RIP_DEBUG_PACKET) | |
1931 | zlog_debug( | |
3efd0893 | 1932 | "RIPv2 dropped because authentication enabled"); |
fe339c95 | 1933 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1934 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1935 | return; |
d62a17ae | 1936 | } |
1937 | ||
1938 | /* Check RIPv2 authentication. */ | |
1939 | switch (ntohs(packet->rte->tag)) { | |
1940 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1941 | auth_desc = "simple"; | |
1942 | ret = rip_auth_simple_password(packet->rte, &from, ifp); | |
1943 | break; | |
1944 | ||
1945 | case RIP_AUTH_MD5: | |
1946 | auth_desc = "MD5"; | |
1947 | ret = rip_auth_md5(packet, &from, len, ifp); | |
1948 | /* Reset RIP packet length to trim MD5 data. */ | |
1949 | len = ret; | |
1950 | break; | |
1951 | ||
1952 | default: | |
1953 | ret = 0; | |
1954 | auth_desc = "unknown type"; | |
1955 | if (IS_RIP_DEBUG_PACKET) | |
1956 | zlog_debug( | |
1957 | "RIPv2 Unknown authentication type %d", | |
1958 | ntohs(packet->rte->tag)); | |
1959 | } | |
1960 | ||
1961 | if (ret) { | |
1962 | if (IS_RIP_DEBUG_PACKET) | |
1963 | zlog_debug("RIPv2 %s authentication success", | |
1964 | auth_desc); | |
1965 | } else { | |
1966 | if (IS_RIP_DEBUG_PACKET) | |
1967 | zlog_debug("RIPv2 %s authentication failure", | |
1968 | auth_desc); | |
fe339c95 | 1969 | ripd_notif_send_auth_failure(ifp->name); |
045c5389 | 1970 | rip_peer_bad_packet(rip, &from); |
cc9f21da | 1971 | return; |
d62a17ae | 1972 | } |
1973 | } | |
1974 | ||
1975 | /* Process each command. */ | |
1976 | switch (packet->command) { | |
1977 | case RIP_RESPONSE: | |
1978 | rip_response_process(packet, len, &from, ifc); | |
1979 | break; | |
1980 | case RIP_REQUEST: | |
1981 | case RIP_POLL: | |
1982 | rip_request_process(packet, len, &from, ifc); | |
1983 | break; | |
1984 | case RIP_TRACEON: | |
1985 | case RIP_TRACEOFF: | |
1986 | zlog_info( | |
1987 | "Obsolete command %s received, please sent it to routed", | |
1988 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 1989 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1990 | break; |
1991 | case RIP_POLL_ENTRY: | |
1992 | zlog_info("Obsolete command %s received", | |
1993 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 1994 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1995 | break; |
1996 | default: | |
1997 | zlog_info("Unknown RIP command %d received", packet->command); | |
045c5389 | 1998 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1999 | break; |
2000 | } | |
718e3744 | 2001 | } |
2002 | ||
718e3744 | 2003 | /* Write routing table entry to the stream and return next index of |
2004 | the routing table entry in the stream. */ | |
d62a17ae | 2005 | static int rip_write_rte(int num, struct stream *s, struct prefix_ipv4 *p, |
d7c0a89a | 2006 | uint8_t version, struct rip_info *rinfo) |
d62a17ae | 2007 | { |
2008 | struct in_addr mask; | |
2009 | ||
2010 | /* Write routing table entry. */ | |
2011 | if (version == RIPv1) { | |
2012 | stream_putw(s, AF_INET); | |
2013 | stream_putw(s, 0); | |
2014 | stream_put_ipv4(s, p->prefix.s_addr); | |
2015 | stream_put_ipv4(s, 0); | |
2016 | stream_put_ipv4(s, 0); | |
2017 | stream_putl(s, rinfo->metric_out); | |
2018 | } else { | |
2019 | masklen2ip(p->prefixlen, &mask); | |
2020 | ||
2021 | stream_putw(s, AF_INET); | |
2022 | stream_putw(s, rinfo->tag_out); | |
2023 | stream_put_ipv4(s, p->prefix.s_addr); | |
2024 | stream_put_ipv4(s, mask.s_addr); | |
2025 | stream_put_ipv4(s, rinfo->nexthop_out.s_addr); | |
2026 | stream_putl(s, rinfo->metric_out); | |
2027 | } | |
2028 | ||
2029 | return ++num; | |
718e3744 | 2030 | } |
2031 | ||
2032 | /* Send update to the ifp or spcified neighbor. */ | |
d62a17ae | 2033 | void rip_output_process(struct connected *ifc, struct sockaddr_in *to, |
d7c0a89a | 2034 | int route_type, uint8_t version) |
d62a17ae | 2035 | { |
045c5389 | 2036 | struct rip *rip; |
d62a17ae | 2037 | int ret; |
2038 | struct stream *s; | |
2039 | struct route_node *rp; | |
2040 | struct rip_info *rinfo; | |
2041 | struct rip_interface *ri; | |
2042 | struct prefix_ipv4 *p; | |
2043 | struct prefix_ipv4 classfull; | |
2044 | struct prefix_ipv4 ifaddrclass; | |
2045 | struct key *key = NULL; | |
2046 | /* this might need to made dynamic if RIP ever supported auth methods | |
2047 | with larger key string sizes */ | |
2048 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
2049 | size_t doff = 0; /* offset of digest offset field */ | |
2050 | int num = 0; | |
2051 | int rtemax; | |
2052 | int subnetted = 0; | |
2053 | struct list *list = NULL; | |
2054 | struct listnode *listnode = NULL; | |
2055 | ||
2056 | /* Logging output event. */ | |
2057 | if (IS_RIP_DEBUG_EVENT) { | |
2058 | if (to) | |
53bb7f9b MS |
2059 | zlog_debug("update routes to neighbor %pI4", |
2060 | &to->sin_addr); | |
d62a17ae | 2061 | else |
2062 | zlog_debug("update routes on interface %s ifindex %d", | |
2063 | ifc->ifp->name, ifc->ifp->ifindex); | |
2064 | } | |
718e3744 | 2065 | |
045c5389 RW |
2066 | /* Get RIP interface. */ |
2067 | ri = ifc->ifp->info; | |
2068 | rip = ri->rip; | |
2069 | ||
d62a17ae | 2070 | /* Set output stream. */ |
2071 | s = rip->obuf; | |
2072 | ||
2073 | /* Reset stream and RTE counter. */ | |
2074 | stream_reset(s); | |
2075 | rtemax = RIP_MAX_RTE; | |
2076 | ||
d62a17ae | 2077 | /* If output interface is in simple password authentication mode, we |
2078 | need space for authentication data. */ | |
2079 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2080 | rtemax -= 1; | |
2081 | ||
2082 | /* If output interface is in MD5 authentication mode, we need space | |
2083 | for authentication header and data. */ | |
2084 | if (ri->auth_type == RIP_AUTH_MD5) | |
2085 | rtemax -= 2; | |
2086 | ||
2087 | /* If output interface is in simple password authentication mode | |
2088 | and string or keychain is specified we need space for auth. data */ | |
2089 | if (ri->auth_type != RIP_NO_AUTH) { | |
2090 | if (ri->key_chain) { | |
2091 | struct keychain *keychain; | |
2092 | ||
2093 | keychain = keychain_lookup(ri->key_chain); | |
2094 | if (keychain) | |
2095 | key = key_lookup_for_send(keychain); | |
2096 | } | |
2097 | /* to be passed to auth functions later */ | |
5c84f238 | 2098 | rip_auth_prepare_str_send(ri, key, auth_str, sizeof(auth_str)); |
558c6842 | 2099 | if (strlen(auth_str) == 0) |
2100 | return; | |
d62a17ae | 2101 | } |
2102 | ||
2103 | if (version == RIPv1) { | |
f51eeb86 | 2104 | memcpy(&ifaddrclass, ifc->address, sizeof(ifaddrclass)); |
d62a17ae | 2105 | apply_classful_mask_ipv4(&ifaddrclass); |
2106 | subnetted = 0; | |
2107 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) | |
2108 | subnetted = 1; | |
2109 | } | |
2110 | ||
91b508dc DS |
2111 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { |
2112 | list = rp->info; | |
d62a17ae | 2113 | |
91b508dc DS |
2114 | if (list == NULL) |
2115 | continue; | |
d62a17ae | 2116 | |
91b508dc DS |
2117 | if (listcount(list) == 0) |
2118 | continue; | |
d62a17ae | 2119 | |
91b508dc DS |
2120 | rinfo = listgetdata(listhead(list)); |
2121 | /* | |
2122 | * For RIPv1, if we are subnetted, output subnets in our | |
2123 | * network that have the same mask as the output "interface". | |
2124 | * For other networks, only the classfull version is output. | |
2125 | */ | |
2126 | if (version == RIPv1) { | |
2127 | p = (struct prefix_ipv4 *)&rp->p; | |
d62a17ae | 2128 | |
91b508dc DS |
2129 | if (IS_RIP_DEBUG_PACKET) |
2130 | zlog_debug( | |
2131 | "RIPv1 mask check, %pFX considered for output", | |
2132 | &rp->p); | |
2133 | ||
2134 | if (subnetted && | |
2135 | prefix_match((struct prefix *)&ifaddrclass, | |
2136 | &rp->p)) { | |
2137 | if ((ifc->address->prefixlen != | |
2138 | rp->p.prefixlen) && | |
2139 | (rp->p.prefixlen != IPV4_MAX_BITLEN)) | |
2140 | continue; | |
2141 | } else { | |
2142 | memcpy(&classfull, &rp->p, | |
2143 | sizeof(struct prefix_ipv4)); | |
2144 | apply_classful_mask_ipv4(&classfull); | |
2145 | if (rp->p.u.prefix4.s_addr != INADDR_ANY && | |
2146 | classfull.prefixlen != rp->p.prefixlen) | |
2147 | continue; | |
2148 | } | |
2149 | if (IS_RIP_DEBUG_PACKET) | |
2150 | zlog_debug( | |
2151 | "RIPv1 mask check, %pFX made it through", | |
2152 | &rp->p); | |
2153 | } else | |
2154 | p = (struct prefix_ipv4 *)&rp->p; | |
d62a17ae | 2155 | |
91b508dc DS |
2156 | /* Apply output filters. */ |
2157 | ret = rip_filter(RIP_FILTER_OUT, p, ri); | |
2158 | if (ret < 0) | |
2159 | continue; | |
d62a17ae | 2160 | |
91b508dc DS |
2161 | /* Changed route only output. */ |
2162 | if (route_type == rip_changed_route && | |
2163 | (!(rinfo->flags & RIP_RTF_CHANGED))) | |
2164 | continue; | |
2165 | ||
2166 | /* Split horizon. */ | |
2167 | if (ri->split_horizon == RIP_SPLIT_HORIZON) { | |
2168 | /* | |
2169 | * We perform split horizon for RIP and connected | |
2170 | * route. For rip routes, we want to suppress the | |
2171 | * route if we would end up sending the route back on | |
2172 | * the interface that we learned it from, with a | |
2173 | * higher metric. For connected routes, we suppress | |
2174 | * the route if the prefix is a subset of the source | |
2175 | * address that we are going to use for the packet | |
2176 | * (in order to handle the case when multiple subnets | |
2177 | * are configured on the same interface). | |
2178 | */ | |
2179 | int suppress = 0; | |
2180 | struct rip_info *tmp_rinfo = NULL; | |
2181 | struct connected *tmp_ifc = NULL; | |
2182 | ||
2183 | for (ALL_LIST_ELEMENTS_RO(list, listnode, tmp_rinfo)) | |
2184 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP && | |
2185 | tmp_rinfo->nh.ifindex == | |
2186 | ifc->ifp->ifindex) { | |
2187 | suppress = 1; | |
2188 | break; | |
9920df07 | 2189 | } |
d62a17ae | 2190 | |
91b508dc DS |
2191 | if (!suppress && rinfo->type == ZEBRA_ROUTE_CONNECT) { |
2192 | for (ALL_LIST_ELEMENTS_RO(ifc->ifp->connected, | |
2193 | listnode, tmp_ifc)) | |
2194 | if (prefix_match((struct prefix *)p, | |
2195 | tmp_ifc->address)) { | |
2196 | suppress = 1; | |
2197 | break; | |
2198 | } | |
d62a17ae | 2199 | } |
2200 | ||
91b508dc DS |
2201 | if (suppress) |
2202 | continue; | |
2203 | } | |
d62a17ae | 2204 | |
91b508dc DS |
2205 | /* Preparation for route-map. */ |
2206 | rinfo->metric_set = 0; | |
2207 | rinfo->nexthop_out.s_addr = 0; | |
2208 | rinfo->metric_out = rinfo->metric; | |
2209 | rinfo->tag_out = rinfo->tag; | |
2210 | rinfo->ifindex_out = ifc->ifp->ifindex; | |
2211 | ||
2212 | /* In order to avoid some local loops, if the RIP route has | |
2213 | * a nexthop via this interface, keep the nexthop, otherwise | |
2214 | * set it to 0. The nexthop should not be propagated beyond | |
2215 | * the local broadcast/multicast area in order to avoid an | |
2216 | * IGP multi-level recursive look-up. see (4.4) | |
2217 | */ | |
2218 | if (rinfo->nh.ifindex == ifc->ifp->ifindex) | |
2219 | rinfo->nexthop_out = rinfo->nh.gate.ipv4; | |
d62a17ae | 2220 | |
91b508dc DS |
2221 | /* Interface route-map */ |
2222 | if (ri->routemap[RIP_FILTER_OUT]) { | |
2223 | ret = route_map_apply(ri->routemap[RIP_FILTER_OUT], | |
2224 | (struct prefix *)p, rinfo); | |
2225 | ||
2226 | if (ret == RMAP_DENYMATCH) { | |
2227 | if (IS_RIP_DEBUG_PACKET) | |
2228 | zlog_debug( | |
2229 | "RIP %pFX is filtered by route-map out", | |
2230 | p); | |
2231 | continue; | |
d62a17ae | 2232 | } |
91b508dc | 2233 | } |
d62a17ae | 2234 | |
91b508dc DS |
2235 | /* Apply redistribute route map - continue, if deny */ |
2236 | if (rip->redist[rinfo->type].route_map.name && | |
2237 | rinfo->sub_type != RIP_ROUTE_INTERFACE) { | |
2238 | ret = route_map_apply( | |
2239 | rip->redist[rinfo->type].route_map.map, | |
2240 | (struct prefix *)p, rinfo); | |
d62a17ae | 2241 | |
91b508dc DS |
2242 | if (ret == RMAP_DENYMATCH) { |
2243 | if (IS_RIP_DEBUG_PACKET) | |
2244 | zlog_debug( | |
2245 | "%pFX is filtered by route-map", | |
2246 | p); | |
2247 | continue; | |
d62a17ae | 2248 | } |
91b508dc | 2249 | } |
d62a17ae | 2250 | |
91b508dc DS |
2251 | /* When route-map does not set metric. */ |
2252 | if (!rinfo->metric_set) { | |
2253 | /* If redistribute metric is set. */ | |
2254 | if (rip->redist[rinfo->type].metric_config && | |
2255 | rinfo->metric != RIP_METRIC_INFINITY) { | |
2256 | rinfo->metric_out = | |
2257 | rip->redist[rinfo->type].metric; | |
2258 | } else { | |
2259 | /* If the route is not connected or localy | |
2260 | * generated one, use default-metric value | |
2261 | */ | |
2262 | if (rinfo->type != ZEBRA_ROUTE_RIP && | |
2263 | rinfo->type != ZEBRA_ROUTE_CONNECT && | |
2264 | rinfo->metric != RIP_METRIC_INFINITY) | |
2265 | rinfo->metric_out = rip->default_metric; | |
d62a17ae | 2266 | } |
91b508dc | 2267 | } |
d62a17ae | 2268 | |
91b508dc DS |
2269 | /* Apply offset-list */ |
2270 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
2271 | rip_offset_list_apply_out(p, ifc->ifp, | |
2272 | &rinfo->metric_out); | |
2273 | ||
2274 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2275 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2276 | ||
2277 | /* Perform split-horizon with poisoned reverse | |
2278 | * for RIP and connected routes. | |
2279 | **/ | |
2280 | if (ri->split_horizon == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
2281 | /* | |
2282 | * We perform split horizon for RIP and connected | |
2283 | * route. For rip routes, we want to suppress the | |
2284 | * route if we would end up sending the route back | |
2285 | * on the interface that we learned it from, with a | |
2286 | * higher metric. For connected routes, we suppress | |
2287 | * the route if the prefix is a subset of the source | |
2288 | * address that we are going to use for the packet | |
2289 | * (in order to handle the case when multiple | |
2290 | * subnets are configured on the same interface). | |
2291 | */ | |
2292 | struct rip_info *tmp_rinfo = NULL; | |
2293 | struct connected *tmp_ifc = NULL; | |
2294 | ||
2295 | for (ALL_LIST_ELEMENTS_RO(list, listnode, tmp_rinfo)) | |
2296 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP && | |
2297 | tmp_rinfo->nh.ifindex == ifc->ifp->ifindex) | |
2298 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2299 | ||
2300 | if (rinfo->metric_out != RIP_METRIC_INFINITY && | |
2301 | rinfo->type == ZEBRA_ROUTE_CONNECT) { | |
2302 | for (ALL_LIST_ELEMENTS_RO(ifc->ifp->connected, | |
2303 | listnode, tmp_ifc)) | |
2304 | if (prefix_match((struct prefix *)p, | |
2305 | tmp_ifc->address)) { | |
9920df07 | 2306 | rinfo->metric_out = |
d62a17ae | 2307 | RIP_METRIC_INFINITY; |
91b508dc DS |
2308 | break; |
2309 | } | |
d62a17ae | 2310 | } |
91b508dc | 2311 | } |
d62a17ae | 2312 | |
91b508dc DS |
2313 | /* Prepare preamble, auth headers, if needs be */ |
2314 | if (num == 0) { | |
2315 | stream_putc(s, RIP_RESPONSE); | |
2316 | stream_putc(s, version); | |
2317 | stream_putw(s, 0); | |
2318 | ||
2319 | /* auth header for !v1 && !no_auth */ | |
2320 | if ((ri->auth_type != RIP_NO_AUTH) && | |
2321 | (version != RIPv1)) | |
2322 | doff = rip_auth_header_write( | |
2323 | s, ri, key, auth_str, | |
2324 | RIP_AUTH_SIMPLE_SIZE); | |
2325 | } | |
d62a17ae | 2326 | |
91b508dc DS |
2327 | /* Write RTE to the stream. */ |
2328 | num = rip_write_rte(num, s, p, version, rinfo); | |
2329 | if (num == rtemax) { | |
2330 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
2331 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2332 | RIP_AUTH_SIMPLE_SIZE); | |
2333 | ||
2334 | ret = rip_send_packet(STREAM_DATA(s), | |
2335 | stream_get_endp(s), to, ifc); | |
2336 | ||
2337 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2338 | rip_packet_dump( | |
2339 | (struct rip_packet *)STREAM_DATA(s), | |
2340 | stream_get_endp(s), "SEND"); | |
2341 | num = 0; | |
2342 | stream_reset(s); | |
d62a17ae | 2343 | } |
91b508dc | 2344 | } |
d62a17ae | 2345 | |
2346 | /* Flush unwritten RTE. */ | |
2347 | if (num != 0) { | |
2348 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
2349 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2350 | RIP_AUTH_SIMPLE_SIZE); | |
2351 | ||
2352 | ret = rip_send_packet(STREAM_DATA(s), stream_get_endp(s), to, | |
2353 | ifc); | |
2354 | ||
2355 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2356 | rip_packet_dump((struct rip_packet *)STREAM_DATA(s), | |
2357 | stream_get_endp(s), "SEND"); | |
2358 | stream_reset(s); | |
2359 | } | |
2360 | ||
2361 | /* Statistics updates. */ | |
2362 | ri->sent_updates++; | |
718e3744 | 2363 | } |
2364 | ||
2365 | /* Send RIP packet to the interface. */ | |
d7c0a89a | 2366 | static void rip_update_interface(struct connected *ifc, uint8_t version, |
d62a17ae | 2367 | int route_type) |
2368 | { | |
2369 | struct interface *ifp = ifc->ifp; | |
2370 | struct rip_interface *ri = ifp->info; | |
2371 | struct sockaddr_in to; | |
2372 | ||
2373 | /* When RIP version is 2 and multicast enable interface. */ | |
2374 | if (version == RIPv2 && !ri->v2_broadcast && if_is_multicast(ifp)) { | |
2375 | if (IS_RIP_DEBUG_EVENT) | |
2376 | zlog_debug("multicast announce on %s ", ifp->name); | |
2377 | ||
2378 | rip_output_process(ifc, NULL, route_type, version); | |
2379 | return; | |
2380 | } | |
2381 | ||
2382 | /* If we can't send multicast packet, send it with unicast. */ | |
2383 | if (if_is_broadcast(ifp) || if_is_pointopoint(ifp)) { | |
2384 | if (ifc->address->family == AF_INET) { | |
2385 | /* Destination address and port setting. */ | |
6006b807 | 2386 | memset(&to, 0, sizeof(to)); |
d62a17ae | 2387 | if (ifc->destination) |
2388 | /* use specified broadcast or peer destination | |
2389 | * addr */ | |
2390 | to.sin_addr = ifc->destination->u.prefix4; | |
936fbaef | 2391 | else if (ifc->address->prefixlen < IPV4_MAX_BITLEN) |
d62a17ae | 2392 | /* calculate the appropriate broadcast address |
2393 | */ | |
2394 | to.sin_addr.s_addr = ipv4_broadcast_addr( | |
2395 | ifc->address->u.prefix4.s_addr, | |
2396 | ifc->address->prefixlen); | |
2397 | else | |
2398 | /* do not know where to send the packet */ | |
2399 | return; | |
2400 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2401 | ||
2402 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b | 2403 | zlog_debug("%s announce to %pI4 on %s", |
d62a17ae | 2404 | CONNECTED_PEER(ifc) ? "unicast" |
2405 | : "broadcast", | |
53bb7f9b | 2406 | &to.sin_addr, ifp->name); |
d62a17ae | 2407 | |
2408 | rip_output_process(ifc, &to, route_type, version); | |
2409 | } | |
2410 | } | |
718e3744 | 2411 | } |
2412 | ||
2413 | /* Update send to all interface and neighbor. */ | |
045c5389 | 2414 | static void rip_update_process(struct rip *rip, int route_type) |
d62a17ae | 2415 | { |
d62a17ae | 2416 | struct listnode *ifnode, *ifnnode; |
2417 | struct connected *connected; | |
2418 | struct interface *ifp; | |
2419 | struct rip_interface *ri; | |
2420 | struct route_node *rp; | |
2421 | struct sockaddr_in to; | |
2422 | struct prefix *p; | |
2423 | ||
2424 | /* Send RIP update to each interface. */ | |
ae7b826a | 2425 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 2426 | if (if_is_loopback(ifp)) |
2427 | continue; | |
2428 | ||
2429 | if (!if_is_operative(ifp)) | |
2430 | continue; | |
2431 | ||
2432 | /* Fetch RIP interface information. */ | |
2433 | ri = ifp->info; | |
2434 | ||
2435 | /* When passive interface is specified, suppress announce to the | |
2436 | interface. */ | |
2437 | if (ri->passive) | |
2438 | continue; | |
2439 | ||
91b508dc DS |
2440 | if (!ri->running) |
2441 | continue; | |
d62a17ae | 2442 | |
91b508dc DS |
2443 | /* |
2444 | * If there is no version configuration in the | |
2445 | * interface, use rip's version setting. | |
2446 | */ | |
2447 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) ? rip->version_send | |
2448 | : ri->ri_send); | |
2449 | ||
2450 | if (IS_RIP_DEBUG_EVENT) | |
2451 | zlog_debug("SEND UPDATE to %s ifindex %d", ifp->name, | |
2452 | ifp->ifindex); | |
2453 | ||
2454 | /* send update on each connected network */ | |
2455 | for (ALL_LIST_ELEMENTS(ifp->connected, ifnode, ifnnode, | |
2456 | connected)) { | |
2457 | if (connected->address->family == AF_INET) { | |
2458 | if (vsend & RIPv1) | |
2459 | rip_update_interface(connected, RIPv1, | |
2460 | route_type); | |
2461 | if ((vsend & RIPv2) && if_is_multicast(ifp)) | |
2462 | rip_update_interface(connected, RIPv2, | |
2463 | route_type); | |
d62a17ae | 2464 | } |
2465 | } | |
2466 | } | |
2467 | ||
2468 | /* RIP send updates to each neighbor. */ | |
91b508dc DS |
2469 | for (rp = route_top(rip->neighbor); rp; rp = route_next(rp)) { |
2470 | if (rp->info == NULL) | |
2471 | continue; | |
d62a17ae | 2472 | |
91b508dc | 2473 | p = &rp->p; |
d62a17ae | 2474 | |
91b508dc DS |
2475 | connected = if_lookup_address(&p->u.prefix4, AF_INET, |
2476 | rip->vrf->vrf_id); | |
2477 | if (!connected) { | |
2478 | zlog_warn( | |
2479 | "Neighbor %pI4 doesn't have connected interface!", | |
2480 | &p->u.prefix4); | |
2481 | continue; | |
b9d92881 | 2482 | } |
91b508dc DS |
2483 | |
2484 | /* Set destination address and port */ | |
2485 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2486 | to.sin_addr = p->u.prefix4; | |
2487 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2488 | ||
2489 | /* RIP version is rip's configuration. */ | |
2490 | rip_output_process(connected, &to, route_type, | |
2491 | rip->version_send); | |
2492 | } | |
718e3744 | 2493 | } |
2494 | ||
2495 | /* RIP's periodical timer. */ | |
cc9f21da | 2496 | static void rip_update(struct thread *t) |
718e3744 | 2497 | { |
045c5389 RW |
2498 | struct rip *rip = THREAD_ARG(t); |
2499 | ||
d62a17ae | 2500 | if (IS_RIP_DEBUG_EVENT) |
2501 | zlog_debug("update timer fire!"); | |
718e3744 | 2502 | |
d62a17ae | 2503 | /* Process update output. */ |
045c5389 | 2504 | rip_update_process(rip, rip_all_route); |
718e3744 | 2505 | |
d62a17ae | 2506 | /* Triggered updates may be suppressed if a regular update is due by |
2507 | the time the triggered update would be sent. */ | |
580e37a3 | 2508 | THREAD_OFF(rip->t_triggered_interval); |
d62a17ae | 2509 | rip->trigger = 0; |
718e3744 | 2510 | |
d62a17ae | 2511 | /* Register myself. */ |
045c5389 | 2512 | rip_event(rip, RIP_UPDATE_EVENT, 0); |
718e3744 | 2513 | } |
2514 | ||
2515 | /* Walk down the RIP routing table then clear changed flag. */ | |
045c5389 | 2516 | static void rip_clear_changed_flag(struct rip *rip) |
718e3744 | 2517 | { |
d62a17ae | 2518 | struct route_node *rp; |
2519 | struct rip_info *rinfo = NULL; | |
2520 | struct list *list = NULL; | |
2521 | struct listnode *listnode = NULL; | |
718e3744 | 2522 | |
91b508dc DS |
2523 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { |
2524 | list = rp->info; | |
2525 | ||
2526 | if (list == NULL) | |
2527 | continue; | |
2528 | ||
2529 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
2530 | UNSET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2531 | /* This flag can be set only on the first entry. */ | |
2532 | break; | |
2533 | } | |
2534 | } | |
718e3744 | 2535 | } |
2536 | ||
2537 | /* Triggered update interval timer. */ | |
cc9f21da | 2538 | static void rip_triggered_interval(struct thread *t) |
718e3744 | 2539 | { |
045c5389 | 2540 | struct rip *rip = THREAD_ARG(t); |
718e3744 | 2541 | |
d62a17ae | 2542 | if (rip->trigger) { |
2543 | rip->trigger = 0; | |
2544 | rip_triggered_update(t); | |
2545 | } | |
d62a17ae | 2546 | } |
718e3744 | 2547 | |
2548 | /* Execute triggered update. */ | |
cc9f21da | 2549 | static void rip_triggered_update(struct thread *t) |
718e3744 | 2550 | { |
045c5389 | 2551 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 2552 | int interval; |
718e3744 | 2553 | |
d62a17ae | 2554 | /* Cancel interval timer. */ |
580e37a3 | 2555 | THREAD_OFF(rip->t_triggered_interval); |
d62a17ae | 2556 | rip->trigger = 0; |
718e3744 | 2557 | |
d62a17ae | 2558 | /* Logging triggered update. */ |
2559 | if (IS_RIP_DEBUG_EVENT) | |
2560 | zlog_debug("triggered update!"); | |
718e3744 | 2561 | |
d62a17ae | 2562 | /* Split Horizon processing is done when generating triggered |
2563 | updates as well as normal updates (see section 2.6). */ | |
045c5389 | 2564 | rip_update_process(rip, rip_changed_route); |
718e3744 | 2565 | |
d62a17ae | 2566 | /* Once all of the triggered updates have been generated, the route |
2567 | change flags should be cleared. */ | |
045c5389 | 2568 | rip_clear_changed_flag(rip); |
718e3744 | 2569 | |
d62a17ae | 2570 | /* After a triggered update is sent, a timer should be set for a |
2571 | random interval between 1 and 5 seconds. If other changes that | |
2572 | would trigger updates occur before the timer expires, a single | |
2573 | update is triggered when the timer expires. */ | |
5920b3eb | 2574 | interval = (frr_weak_random() % 5) + 1; |
718e3744 | 2575 | |
045c5389 | 2576 | thread_add_timer(master, rip_triggered_interval, rip, interval, |
d62a17ae | 2577 | &rip->t_triggered_interval); |
718e3744 | 2578 | } |
2579 | ||
2580 | /* Withdraw redistributed route. */ | |
045c5389 | 2581 | void rip_redistribute_withdraw(struct rip *rip, int type) |
d62a17ae | 2582 | { |
2583 | struct route_node *rp; | |
2584 | struct rip_info *rinfo = NULL; | |
2585 | struct list *list = NULL; | |
2586 | ||
91b508dc DS |
2587 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { |
2588 | list = rp->info; | |
d62a17ae | 2589 | |
91b508dc DS |
2590 | if (list == NULL) |
2591 | continue; | |
d62a17ae | 2592 | |
91b508dc | 2593 | rinfo = listgetdata(listhead(list)); |
d62a17ae | 2594 | |
91b508dc DS |
2595 | if (rinfo->type != type) |
2596 | continue; | |
2597 | ||
2598 | if (rinfo->sub_type == RIP_ROUTE_INTERFACE) | |
2599 | continue; | |
2600 | ||
2601 | /* Perform poisoned reverse. */ | |
2602 | rinfo->metric = RIP_METRIC_INFINITY; | |
2603 | RIP_TIMER_ON(rinfo->t_garbage_collect, rip_garbage_collect, | |
2604 | rip->garbage_time); | |
580e37a3 | 2605 | THREAD_OFF(rinfo->t_timeout); |
91b508dc DS |
2606 | rinfo->flags |= RIP_RTF_CHANGED; |
2607 | ||
2608 | if (IS_RIP_DEBUG_EVENT) { | |
2609 | struct prefix_ipv4 *p = (struct prefix_ipv4 *)&rp->p; | |
2610 | ||
2611 | zlog_debug( | |
2612 | "Poisone %pFX on the interface %s with an infinity metric [withdraw]", | |
2613 | p, | |
2614 | ifindex2ifname(rinfo->nh.ifindex, | |
2615 | rip->vrf->vrf_id)); | |
d62a17ae | 2616 | } |
91b508dc DS |
2617 | |
2618 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); | |
2619 | } | |
d62a17ae | 2620 | } |
2621 | ||
045c5389 RW |
2622 | struct rip *rip_lookup_by_vrf_id(vrf_id_t vrf_id) |
2623 | { | |
2624 | struct vrf *vrf; | |
2625 | ||
2626 | vrf = vrf_lookup_by_id(vrf_id); | |
2627 | if (!vrf) | |
2628 | return NULL; | |
2629 | ||
2630 | return vrf->info; | |
2631 | } | |
2632 | ||
ae7b826a RW |
2633 | struct rip *rip_lookup_by_vrf_name(const char *vrf_name) |
2634 | { | |
2635 | struct rip rip; | |
2636 | ||
2637 | rip.vrf_name = (char *)vrf_name; | |
2638 | ||
2639 | return RB_FIND(rip_instance_head, &rip_instances, &rip); | |
2640 | } | |
2641 | ||
d62a17ae | 2642 | /* Create new RIP instance and set it to global variable. */ |
ae7b826a | 2643 | struct rip *rip_create(const char *vrf_name, struct vrf *vrf, int socket) |
718e3744 | 2644 | { |
045c5389 | 2645 | struct rip *rip; |
045c5389 | 2646 | |
d62a17ae | 2647 | rip = XCALLOC(MTYPE_RIP, sizeof(struct rip)); |
ae7b826a | 2648 | rip->vrf_name = XSTRDUP(MTYPE_RIP_VRF_NAME, vrf_name); |
718e3744 | 2649 | |
d62a17ae | 2650 | /* Set initial value. */ |
8c9226c2 RW |
2651 | rip->ecmp = yang_get_default_bool("%s/allow-ecmp", RIP_INSTANCE); |
2652 | rip->default_metric = | |
2653 | yang_get_default_uint8("%s/default-metric", RIP_INSTANCE); | |
2654 | rip->distance = | |
2655 | yang_get_default_uint8("%s/distance/default", RIP_INSTANCE); | |
44f2f852 RW |
2656 | rip->passive_default = |
2657 | yang_get_default_bool("%s/passive-default", RIP_INSTANCE); | |
8c9226c2 RW |
2658 | rip->garbage_time = yang_get_default_uint32("%s/timers/flush-interval", |
2659 | RIP_INSTANCE); | |
2660 | rip->timeout_time = yang_get_default_uint32( | |
2661 | "%s/timers/holddown-interval", RIP_INSTANCE); | |
2662 | rip->update_time = yang_get_default_uint32("%s/timers/update-interval", | |
2663 | RIP_INSTANCE); | |
2664 | rip->version_send = | |
2665 | yang_get_default_enum("%s/version/send", RIP_INSTANCE); | |
2666 | rip->version_recv = | |
2667 | yang_get_default_enum("%s/version/receive", RIP_INSTANCE); | |
718e3744 | 2668 | |
ca046902 | 2669 | /* Initialize RIP data structures. */ |
d62a17ae | 2670 | rip->table = route_table_init(); |
045c5389 | 2671 | route_table_set_info(rip->table, rip); |
d62a17ae | 2672 | rip->neighbor = route_table_init(); |
29e897ad RW |
2673 | rip->peer_list = list_new(); |
2674 | rip->peer_list->cmp = (int (*)(void *, void *))rip_peer_list_cmp; | |
711915d2 | 2675 | rip->peer_list->del = rip_peer_list_del; |
2826309c RW |
2676 | rip->distance_table = route_table_init(); |
2677 | rip->distance_table->cleanup = rip_distance_table_node_cleanup; | |
ca046902 | 2678 | rip->enable_interface = vector_init(1); |
1205fdc4 | 2679 | rip->enable_network = route_table_init(); |
5a29c0d5 | 2680 | rip->passive_nondefault = vector_init(1); |
3f21c8c4 RW |
2681 | rip->offset_list_master = list_new(); |
2682 | rip->offset_list_master->cmp = (int (*)(void *, void *))offset_list_cmp; | |
6c4c3561 | 2683 | rip->offset_list_master->del = (void (*)(void *))offset_list_free; |
718e3744 | 2684 | |
2d2eaa13 | 2685 | /* Distribute list install. */ |
ae7b826a | 2686 | rip->distribute_ctx = distribute_list_ctx_create(vrf); |
2d2eaa13 RW |
2687 | distribute_list_add_hook(rip->distribute_ctx, rip_distribute_update); |
2688 | distribute_list_delete_hook(rip->distribute_ctx, rip_distribute_update); | |
2689 | ||
4b23867c | 2690 | /* if rmap install. */ |
8f88441d | 2691 | rip->if_rmap_ctx = if_rmap_ctx_create(vrf_name); |
4b23867c PG |
2692 | if_rmap_hook_add(rip->if_rmap_ctx, rip_if_rmap_update); |
2693 | if_rmap_hook_delete(rip->if_rmap_ctx, rip_if_rmap_update); | |
2694 | ||
d62a17ae | 2695 | /* Make output stream. */ |
2696 | rip->obuf = stream_new(1500); | |
16705130 | 2697 | |
ae7b826a RW |
2698 | /* Enable the routing instance if possible. */ |
2699 | if (vrf && vrf_is_enabled(vrf)) | |
2700 | rip_instance_enable(rip, vrf, socket); | |
2701 | else { | |
2702 | rip->vrf = NULL; | |
2703 | rip->sock = -1; | |
045c5389 RW |
2704 | } |
2705 | ||
ae7b826a RW |
2706 | RB_INSERT(rip_instance_head, &rip_instances, rip); |
2707 | ||
045c5389 | 2708 | return rip; |
d62a17ae | 2709 | } |
718e3744 | 2710 | |
d62a17ae | 2711 | /* Sned RIP request to the destination. */ |
2712 | int rip_request_send(struct sockaddr_in *to, struct interface *ifp, | |
d7c0a89a | 2713 | uint8_t version, struct connected *connected) |
d62a17ae | 2714 | { |
2715 | struct rte *rte; | |
2716 | struct rip_packet rip_packet; | |
2717 | struct listnode *node, *nnode; | |
2718 | ||
2719 | memset(&rip_packet, 0, sizeof(rip_packet)); | |
2720 | ||
2721 | rip_packet.command = RIP_REQUEST; | |
2722 | rip_packet.version = version; | |
2723 | rte = rip_packet.rte; | |
2724 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
2725 | ||
2726 | if (connected) { | |
2727 | /* | |
2728 | * connected is only sent for ripv1 case, or when | |
2729 | * interface does not support multicast. Caller loops | |
2730 | * over each connected address for this case. | |
2731 | */ | |
d7c0a89a | 2732 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2733 | to, connected) |
2734 | != sizeof(rip_packet)) | |
2735 | return -1; | |
2736 | else | |
2737 | return sizeof(rip_packet); | |
2738 | } | |
718e3744 | 2739 | |
d62a17ae | 2740 | /* send request on each connected network */ |
2741 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, connected)) { | |
2742 | struct prefix_ipv4 *p; | |
718e3744 | 2743 | |
d62a17ae | 2744 | p = (struct prefix_ipv4 *)connected->address; |
718e3744 | 2745 | |
d62a17ae | 2746 | if (p->family != AF_INET) |
2747 | continue; | |
f6eacff4 | 2748 | |
d7c0a89a | 2749 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2750 | to, connected) |
2751 | != sizeof(rip_packet)) | |
2752 | return -1; | |
2753 | } | |
2754 | return sizeof(rip_packet); | |
718e3744 | 2755 | } |
2756 | ||
d62a17ae | 2757 | static int rip_update_jitter(unsigned long time) |
718e3744 | 2758 | { |
239389ba | 2759 | #define JITTER_BOUND 4 |
d62a17ae | 2760 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. |
2761 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2762 | The RIPv2 RFC says jitter should be small compared to | |
2763 | update_time. We consider 1/JITTER_BOUND to be small. | |
2764 | */ | |
2765 | ||
2766 | int jitter_input = time; | |
2767 | int jitter; | |
2768 | ||
2769 | if (jitter_input < JITTER_BOUND) | |
2770 | jitter_input = JITTER_BOUND; | |
2771 | ||
5920b3eb RZ |
2772 | jitter = (((frr_weak_random() % ((jitter_input * 2) + 1)) |
2773 | - jitter_input)); | |
d62a17ae | 2774 | |
2775 | return jitter / JITTER_BOUND; | |
2776 | } | |
2777 | ||
045c5389 | 2778 | void rip_event(struct rip *rip, enum rip_event event, int sock) |
d62a17ae | 2779 | { |
2780 | int jitter = 0; | |
2781 | ||
2782 | switch (event) { | |
2783 | case RIP_READ: | |
045c5389 | 2784 | thread_add_read(master, rip_read, rip, sock, &rip->t_read); |
d62a17ae | 2785 | break; |
2786 | case RIP_UPDATE_EVENT: | |
580e37a3 | 2787 | THREAD_OFF(rip->t_update); |
d62a17ae | 2788 | jitter = rip_update_jitter(rip->update_time); |
045c5389 | 2789 | thread_add_timer(master, rip_update, rip, |
d62a17ae | 2790 | sock ? 2 : rip->update_time + jitter, |
2791 | &rip->t_update); | |
2792 | break; | |
2793 | case RIP_TRIGGERED_UPDATE: | |
2794 | if (rip->t_triggered_interval) | |
2795 | rip->trigger = 1; | |
2796 | else | |
045c5389 | 2797 | thread_add_event(master, rip_triggered_update, rip, 0, |
d62a17ae | 2798 | &rip->t_triggered_update); |
2799 | break; | |
2800 | default: | |
2801 | break; | |
2802 | } | |
718e3744 | 2803 | } |
6b0655a2 | 2804 | |
23b23d8c | 2805 | struct rip_distance *rip_distance_new(void) |
718e3744 | 2806 | { |
d62a17ae | 2807 | return XCALLOC(MTYPE_RIP_DISTANCE, sizeof(struct rip_distance)); |
718e3744 | 2808 | } |
2809 | ||
23b23d8c | 2810 | void rip_distance_free(struct rip_distance *rdistance) |
d62a17ae | 2811 | { |
2826309c RW |
2812 | if (rdistance->access_list) |
2813 | free(rdistance->access_list); | |
d62a17ae | 2814 | XFREE(MTYPE_RIP_DISTANCE, rdistance); |
718e3744 | 2815 | } |
2816 | ||
2826309c RW |
2817 | static void rip_distance_table_node_cleanup(struct route_table *table, |
2818 | struct route_node *node) | |
d62a17ae | 2819 | { |
d62a17ae | 2820 | struct rip_distance *rdistance; |
718e3744 | 2821 | |
2826309c RW |
2822 | rdistance = node->info; |
2823 | if (rdistance) | |
2824 | rip_distance_free(rdistance); | |
d62a17ae | 2825 | } |
2826 | ||
2827 | /* Apply RIP information to distance method. */ | |
045c5389 | 2828 | uint8_t rip_distance_apply(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 2829 | { |
2830 | struct route_node *rn; | |
2831 | struct prefix_ipv4 p; | |
2832 | struct rip_distance *rdistance; | |
2833 | struct access_list *alist; | |
2834 | ||
6006b807 | 2835 | memset(&p, 0, sizeof(p)); |
d62a17ae | 2836 | p.family = AF_INET; |
2837 | p.prefix = rinfo->from; | |
2838 | p.prefixlen = IPV4_MAX_BITLEN; | |
2839 | ||
2840 | /* Check source address. */ | |
2826309c | 2841 | rn = route_node_match(rip->distance_table, (struct prefix *)&p); |
d62a17ae | 2842 | if (rn) { |
2843 | rdistance = rn->info; | |
2844 | route_unlock_node(rn); | |
2845 | ||
2846 | if (rdistance->access_list) { | |
2847 | alist = access_list_lookup(AFI_IP, | |
2848 | rdistance->access_list); | |
2849 | if (alist == NULL) | |
2850 | return 0; | |
2851 | if (access_list_apply(alist, &rinfo->rp->p) | |
2852 | == FILTER_DENY) | |
2853 | return 0; | |
2854 | ||
2855 | return rdistance->distance; | |
2856 | } else | |
2857 | return rdistance->distance; | |
718e3744 | 2858 | } |
718e3744 | 2859 | |
d62a17ae | 2860 | if (rip->distance) |
2861 | return rip->distance; | |
718e3744 | 2862 | |
d62a17ae | 2863 | return 0; |
718e3744 | 2864 | } |
2865 | ||
045c5389 | 2866 | static void rip_distance_show(struct vty *vty, struct rip *rip) |
d62a17ae | 2867 | { |
2868 | struct route_node *rn; | |
2869 | struct rip_distance *rdistance; | |
2870 | int header = 1; | |
2871 | char buf[BUFSIZ]; | |
2872 | ||
7f8a9cba | 2873 | vty_out(vty, " Distance: (default is %u)\n", |
d62a17ae | 2874 | rip->distance ? rip->distance : ZEBRA_RIP_DISTANCE_DEFAULT); |
2875 | ||
91b508dc DS |
2876 | for (rn = route_top(rip->distance_table); rn; rn = route_next(rn)) { |
2877 | rdistance = rn->info; | |
2878 | ||
2879 | if (rdistance == NULL) | |
2880 | continue; | |
2881 | ||
2882 | if (header) { | |
2883 | vty_out(vty, " Address Distance List\n"); | |
2884 | header = 0; | |
d62a17ae | 2885 | } |
91b508dc DS |
2886 | snprintfrr(buf, sizeof(buf), "%pFX", &rn->p); |
2887 | vty_out(vty, " %-20s %4d %s\n", buf, rdistance->distance, | |
2888 | rdistance->access_list ? rdistance->access_list : ""); | |
2889 | } | |
718e3744 | 2890 | } |
2891 | ||
8478ae7e | 2892 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
045c5389 | 2893 | void rip_ecmp_disable(struct rip *rip) |
d62a17ae | 2894 | { |
2895 | struct route_node *rp; | |
2896 | struct rip_info *rinfo, *tmp_rinfo; | |
2897 | struct list *list; | |
2898 | struct listnode *node, *nextnode; | |
2899 | ||
91b508dc DS |
2900 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { |
2901 | list = rp->info; | |
d62a17ae | 2902 | |
91b508dc DS |
2903 | if (!list) |
2904 | continue; | |
2905 | if (listcount(list) == 0) | |
2906 | continue; | |
d62a17ae | 2907 | |
91b508dc DS |
2908 | rinfo = listgetdata(listhead(list)); |
2909 | if (!rip_route_rte(rinfo)) | |
2910 | continue; | |
d62a17ae | 2911 | |
91b508dc DS |
2912 | /* Drop all other entries, except the first one. */ |
2913 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) { | |
2914 | if (tmp_rinfo == rinfo) | |
2915 | continue; | |
d62a17ae | 2916 | |
580e37a3 DS |
2917 | THREAD_OFF(tmp_rinfo->t_timeout); |
2918 | THREAD_OFF(tmp_rinfo->t_garbage_collect); | |
91b508dc DS |
2919 | list_delete_node(list, node); |
2920 | rip_info_free(tmp_rinfo); | |
d62a17ae | 2921 | } |
91b508dc DS |
2922 | |
2923 | /* Update zebra. */ | |
2924 | rip_zebra_ipv4_add(rip, rp); | |
2925 | ||
2926 | /* Set the route change flag. */ | |
2927 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2928 | ||
2929 | /* Signal the output process to trigger an update. */ | |
2930 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); | |
2931 | } | |
8478ae7e LF |
2932 | } |
2933 | ||
718e3744 | 2934 | /* Print out routes update time. */ |
d62a17ae | 2935 | static void rip_vty_out_uptime(struct vty *vty, struct rip_info *rinfo) |
718e3744 | 2936 | { |
d62a17ae | 2937 | time_t clock; |
a2700b50 | 2938 | struct tm tm; |
718e3744 | 2939 | #define TIME_BUF 25 |
d62a17ae | 2940 | char timebuf[TIME_BUF]; |
2941 | struct thread *thread; | |
2942 | ||
2943 | if ((thread = rinfo->t_timeout) != NULL) { | |
2944 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
2945 | gmtime_r(&clock, &tm); |
2946 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 2947 | vty_out(vty, "%5s", timebuf); |
2948 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
2949 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
2950 | gmtime_r(&clock, &tm); |
2951 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 2952 | vty_out(vty, "%5s", timebuf); |
2953 | } | |
2954 | } | |
2955 | ||
2956 | static const char *rip_route_type_print(int sub_type) | |
2957 | { | |
2958 | switch (sub_type) { | |
2959 | case RIP_ROUTE_RTE: | |
2960 | return "n"; | |
2961 | case RIP_ROUTE_STATIC: | |
2962 | return "s"; | |
2963 | case RIP_ROUTE_DEFAULT: | |
2964 | return "d"; | |
2965 | case RIP_ROUTE_REDISTRIBUTE: | |
2966 | return "r"; | |
2967 | case RIP_ROUTE_INTERFACE: | |
2968 | return "i"; | |
2969 | default: | |
2970 | return "?"; | |
2971 | } | |
718e3744 | 2972 | } |
2973 | ||
2974 | DEFUN (show_ip_rip, | |
2975 | show_ip_rip_cmd, | |
ae7b826a | 2976 | "show ip rip [vrf NAME]", |
718e3744 | 2977 | SHOW_STR |
2978 | IP_STR | |
ae7b826a RW |
2979 | "Show RIP routes\n" |
2980 | VRF_CMD_HELP_STR) | |
718e3744 | 2981 | { |
045c5389 | 2982 | struct rip *rip; |
d62a17ae | 2983 | struct route_node *np; |
2984 | struct rip_info *rinfo = NULL; | |
2985 | struct list *list = NULL; | |
2986 | struct listnode *listnode = NULL; | |
ae7b826a RW |
2987 | const char *vrf_name; |
2988 | int idx = 0; | |
d62a17ae | 2989 | |
ae7b826a RW |
2990 | if (argv_find(argv, argc, "vrf", &idx)) |
2991 | vrf_name = argv[idx + 1]->arg; | |
2992 | else | |
2993 | vrf_name = VRF_DEFAULT_NAME; | |
2994 | ||
2995 | rip = rip_lookup_by_vrf_name(vrf_name); | |
2996 | if (!rip) { | |
2997 | vty_out(vty, "%% RIP instance not found\n"); | |
2998 | return CMD_SUCCESS; | |
2999 | } | |
3000 | if (!rip->enabled) { | |
3001 | vty_out(vty, "%% RIP instance is disabled\n"); | |
d62a17ae | 3002 | return CMD_SUCCESS; |
ae7b826a | 3003 | } |
d62a17ae | 3004 | |
3005 | vty_out(vty, | |
3006 | "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP\n" | |
3007 | "Sub-codes:\n" | |
3008 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
3009 | " (i) - interface\n\n" | |
3010 | " Network Next Hop Metric From Tag Time\n"); | |
3011 | ||
91b508dc DS |
3012 | for (np = route_top(rip->table); np; np = route_next(np)) { |
3013 | list = np->info; | |
d62a17ae | 3014 | |
91b508dc DS |
3015 | if (!list) |
3016 | continue; | |
3017 | ||
3018 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
3019 | int len; | |
3020 | ||
3021 | len = vty_out(vty, "%c(%s) %pFX", | |
3022 | /* np->lock, For debugging. */ | |
3023 | zebra_route_char(rinfo->type), | |
3024 | rip_route_type_print(rinfo->sub_type), | |
3025 | &np->p); | |
3026 | ||
3027 | len = 24 - len; | |
3028 | ||
3029 | if (len > 0) | |
3030 | vty_out(vty, "%*s", len, " "); | |
d62a17ae | 3031 | |
91b508dc DS |
3032 | switch (rinfo->nh.type) { |
3033 | case NEXTHOP_TYPE_IPV4: | |
3034 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
3035 | vty_out(vty, "%-20pI4 %2d ", | |
3036 | &rinfo->nh.gate.ipv4, rinfo->metric); | |
3037 | break; | |
3038 | case NEXTHOP_TYPE_IFINDEX: | |
3039 | vty_out(vty, "0.0.0.0 %2d ", | |
3040 | rinfo->metric); | |
3041 | break; | |
3042 | case NEXTHOP_TYPE_BLACKHOLE: | |
3043 | vty_out(vty, "blackhole %2d ", | |
3044 | rinfo->metric); | |
3045 | break; | |
3046 | case NEXTHOP_TYPE_IPV6: | |
3047 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
3048 | vty_out(vty, "V6 Address Hidden %2d ", | |
3049 | rinfo->metric); | |
3050 | break; | |
3051 | } | |
3052 | ||
3053 | /* Route which exist in kernel routing table. */ | |
3054 | if ((rinfo->type == ZEBRA_ROUTE_RIP) && | |
3055 | (rinfo->sub_type == RIP_ROUTE_RTE)) { | |
3056 | vty_out(vty, "%-15pI4 ", &rinfo->from); | |
3057 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3058 | (route_tag_t)rinfo->tag); | |
3059 | rip_vty_out_uptime(vty, rinfo); | |
3060 | } else if (rinfo->metric == RIP_METRIC_INFINITY) { | |
3061 | vty_out(vty, "self "); | |
3062 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3063 | (route_tag_t)rinfo->tag); | |
3064 | rip_vty_out_uptime(vty, rinfo); | |
3065 | } else { | |
3066 | if (rinfo->external_metric) { | |
3067 | len = vty_out( | |
3068 | vty, "self (%s:%d)", | |
3069 | zebra_route_string(rinfo->type), | |
3070 | rinfo->external_metric); | |
3071 | len = 16 - len; | |
3072 | if (len > 0) | |
3073 | vty_out(vty, "%*s", len, " "); | |
3074 | } else | |
3075 | vty_out(vty, "self "); | |
3076 | vty_out(vty, "%3" ROUTE_TAG_PRI, | |
3077 | (route_tag_t)rinfo->tag); | |
d62a17ae | 3078 | } |
91b508dc DS |
3079 | |
3080 | vty_out(vty, "\n"); | |
3081 | } | |
3082 | } | |
d62a17ae | 3083 | return CMD_SUCCESS; |
718e3744 | 3084 | } |
3085 | ||
16705130 | 3086 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3087 | DEFUN (show_ip_rip_status, | |
3088 | show_ip_rip_status_cmd, | |
ae7b826a | 3089 | "show ip rip [vrf NAME] status", |
718e3744 | 3090 | SHOW_STR |
3091 | IP_STR | |
16705130 | 3092 | "Show RIP routes\n" |
ae7b826a | 3093 | VRF_CMD_HELP_STR |
718e3744 | 3094 | "IP routing protocol process parameters and statistics\n") |
3095 | { | |
045c5389 | 3096 | struct rip *rip; |
d62a17ae | 3097 | struct interface *ifp; |
3098 | struct rip_interface *ri; | |
3099 | extern const struct message ri_version_msg[]; | |
3100 | const char *send_version; | |
3101 | const char *receive_version; | |
ae7b826a RW |
3102 | const char *vrf_name; |
3103 | int idx = 0; | |
d62a17ae | 3104 | |
ae7b826a RW |
3105 | if (argv_find(argv, argc, "vrf", &idx)) |
3106 | vrf_name = argv[idx + 1]->arg; | |
3107 | else | |
3108 | vrf_name = VRF_DEFAULT_NAME; | |
3109 | ||
3110 | rip = rip_lookup_by_vrf_name(vrf_name); | |
3111 | if (!rip) { | |
3112 | vty_out(vty, "%% RIP instance not found\n"); | |
d62a17ae | 3113 | return CMD_SUCCESS; |
ae7b826a RW |
3114 | } |
3115 | if (!rip->enabled) { | |
3116 | vty_out(vty, "%% RIP instance is disabled\n"); | |
3117 | return CMD_SUCCESS; | |
3118 | } | |
d62a17ae | 3119 | |
3120 | vty_out(vty, "Routing Protocol is \"rip\"\n"); | |
b745780b | 3121 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 3122 | rip->update_time); |
3123 | vty_out(vty, " next due in %lu seconds\n", | |
3124 | thread_timer_remain_second(rip->t_update)); | |
b745780b RW |
3125 | vty_out(vty, " Timeout after %u seconds,", rip->timeout_time); |
3126 | vty_out(vty, " garbage collect after %u seconds\n", rip->garbage_time); | |
d62a17ae | 3127 | |
3128 | /* Filtering status show. */ | |
03a38493 | 3129 | config_show_distribute(vty, rip->distribute_ctx); |
d62a17ae | 3130 | |
3131 | /* Default metric information. */ | |
282ae30c | 3132 | vty_out(vty, " Default redistribution metric is %u\n", |
d62a17ae | 3133 | rip->default_metric); |
3134 | ||
3135 | /* Redistribute information. */ | |
3136 | vty_out(vty, " Redistributing:"); | |
045c5389 | 3137 | rip_show_redistribute_config(vty, rip); |
d62a17ae | 3138 | vty_out(vty, "\n"); |
3139 | ||
3140 | vty_out(vty, " Default version control: send version %s,", | |
3141 | lookup_msg(ri_version_msg, rip->version_send, NULL)); | |
3142 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3143 | vty_out(vty, " receive any version \n"); | |
3144 | else | |
3145 | vty_out(vty, " receive version %s \n", | |
3146 | lookup_msg(ri_version_msg, rip->version_recv, NULL)); | |
3147 | ||
3148 | vty_out(vty, " Interface Send Recv Key-chain\n"); | |
3149 | ||
ae7b826a | 3150 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 3151 | ri = ifp->info; |
3152 | ||
3153 | if (!ri->running) | |
3154 | continue; | |
3155 | ||
3156 | if (ri->enable_network || ri->enable_interface) { | |
3157 | if (ri->ri_send == RI_RIP_UNSPEC) | |
3158 | send_version = | |
3159 | lookup_msg(ri_version_msg, | |
3160 | rip->version_send, NULL); | |
3161 | else | |
3162 | send_version = lookup_msg(ri_version_msg, | |
3163 | ri->ri_send, NULL); | |
3164 | ||
3165 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
3166 | receive_version = | |
3167 | lookup_msg(ri_version_msg, | |
3168 | rip->version_recv, NULL); | |
3169 | else | |
3170 | receive_version = lookup_msg( | |
3171 | ri_version_msg, ri->ri_receive, NULL); | |
3172 | ||
3173 | vty_out(vty, " %-17s%-3s %-3s %s\n", ifp->name, | |
3174 | send_version, receive_version, | |
3175 | ri->key_chain ? ri->key_chain : ""); | |
3176 | } | |
3177 | } | |
718e3744 | 3178 | |
d62a17ae | 3179 | vty_out(vty, " Routing for Networks:\n"); |
045c5389 | 3180 | rip_show_network_config(vty, rip); |
718e3744 | 3181 | |
91b508dc DS |
3182 | int found_passive = 0; |
3183 | FOR_ALL_INTERFACES (rip->vrf, ifp) { | |
3184 | ri = ifp->info; | |
3185 | ||
3186 | if ((ri->enable_network || ri->enable_interface) && | |
3187 | ri->passive) { | |
3188 | if (!found_passive) { | |
3189 | vty_out(vty, " Passive Interface(s):\n"); | |
3190 | found_passive = 1; | |
d62a17ae | 3191 | } |
91b508dc | 3192 | vty_out(vty, " %s\n", ifp->name); |
d62a17ae | 3193 | } |
718e3744 | 3194 | } |
3195 | ||
d62a17ae | 3196 | vty_out(vty, " Routing Information Sources:\n"); |
3197 | vty_out(vty, | |
3198 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
045c5389 | 3199 | rip_peer_display(vty, rip); |
718e3744 | 3200 | |
045c5389 | 3201 | rip_distance_show(vty, rip); |
718e3744 | 3202 | |
d62a17ae | 3203 | return CMD_SUCCESS; |
3204 | } | |
718e3744 | 3205 | |
d62a17ae | 3206 | /* RIP configuration write function. */ |
3207 | static int config_write_rip(struct vty *vty) | |
3208 | { | |
ae7b826a | 3209 | struct rip *rip; |
d62a17ae | 3210 | int write = 0; |
d62a17ae | 3211 | |
ae7b826a RW |
3212 | RB_FOREACH(rip, rip_instance_head, &rip_instances) { |
3213 | char xpath[XPATH_MAXLEN]; | |
3214 | struct lyd_node *dnode; | |
045c5389 | 3215 | |
ae7b826a RW |
3216 | snprintf(xpath, sizeof(xpath), |
3217 | "/frr-ripd:ripd/instance[vrf='%s']", rip->vrf_name); | |
3218 | ||
3219 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
3220 | assert(dnode); | |
d62a17ae | 3221 | |
8c9226c2 RW |
3222 | nb_cli_show_dnode_cmds(vty, dnode, false); |
3223 | ||
ae7b826a RW |
3224 | /* Distribute configuration. */ |
3225 | config_write_distribute(vty, rip->distribute_ctx); | |
d62a17ae | 3226 | |
ae7b826a | 3227 | /* Interface routemap configuration */ |
8f88441d | 3228 | config_write_if_rmap(vty, rip->if_rmap_ctx); |
ae7b826a | 3229 | |
07679ad9 IR |
3230 | vty_out(vty, "exit\n"); |
3231 | ||
ae7b826a | 3232 | write = 1; |
d62a17ae | 3233 | } |
ae7b826a | 3234 | |
d62a17ae | 3235 | return write; |
3236 | } | |
718e3744 | 3237 | |
612c2c15 | 3238 | static int config_write_rip(struct vty *vty); |
d62a17ae | 3239 | /* RIP node structure. */ |
62b346ee | 3240 | static struct cmd_node rip_node = { |
f4b8291f | 3241 | .name = "rip", |
62b346ee | 3242 | .node = RIP_NODE, |
24389580 | 3243 | .parent_node = CONFIG_NODE, |
62b346ee | 3244 | .prompt = "%s(config-router)# ", |
612c2c15 | 3245 | .config_write = config_write_rip, |
62b346ee | 3246 | }; |
718e3744 | 3247 | |
d62a17ae | 3248 | /* Distribute-list update functions. */ |
03a38493 PG |
3249 | static void rip_distribute_update(struct distribute_ctx *ctx, |
3250 | struct distribute *dist) | |
d62a17ae | 3251 | { |
3252 | struct interface *ifp; | |
3253 | struct rip_interface *ri; | |
3254 | struct access_list *alist; | |
3255 | struct prefix_list *plist; | |
8478ae7e | 3256 | |
ae7b826a | 3257 | if (!ctx->vrf || !dist->ifname) |
d62a17ae | 3258 | return; |
718e3744 | 3259 | |
a36898e7 | 3260 | ifp = if_lookup_by_name(dist->ifname, ctx->vrf->vrf_id); |
d62a17ae | 3261 | if (ifp == NULL) |
3262 | return; | |
718e3744 | 3263 | |
d62a17ae | 3264 | ri = ifp->info; |
6b0655a2 | 3265 | |
d62a17ae | 3266 | if (dist->list[DISTRIBUTE_V4_IN]) { |
3267 | alist = access_list_lookup(AFI_IP, | |
3268 | dist->list[DISTRIBUTE_V4_IN]); | |
3269 | if (alist) | |
3270 | ri->list[RIP_FILTER_IN] = alist; | |
3271 | else | |
3272 | ri->list[RIP_FILTER_IN] = NULL; | |
3273 | } else | |
3274 | ri->list[RIP_FILTER_IN] = NULL; | |
3275 | ||
3276 | if (dist->list[DISTRIBUTE_V4_OUT]) { | |
3277 | alist = access_list_lookup(AFI_IP, | |
3278 | dist->list[DISTRIBUTE_V4_OUT]); | |
3279 | if (alist) | |
3280 | ri->list[RIP_FILTER_OUT] = alist; | |
3281 | else | |
3282 | ri->list[RIP_FILTER_OUT] = NULL; | |
3283 | } else | |
3284 | ri->list[RIP_FILTER_OUT] = NULL; | |
3285 | ||
3286 | if (dist->prefix[DISTRIBUTE_V4_IN]) { | |
3287 | plist = prefix_list_lookup(AFI_IP, | |
3288 | dist->prefix[DISTRIBUTE_V4_IN]); | |
3289 | if (plist) | |
3290 | ri->prefix[RIP_FILTER_IN] = plist; | |
3291 | else | |
3292 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3293 | } else | |
3294 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3295 | ||
3296 | if (dist->prefix[DISTRIBUTE_V4_OUT]) { | |
3297 | plist = prefix_list_lookup(AFI_IP, | |
3298 | dist->prefix[DISTRIBUTE_V4_OUT]); | |
3299 | if (plist) | |
3300 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3301 | else | |
3302 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3303 | } else | |
3304 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3305 | } | |
3306 | ||
3307 | void rip_distribute_update_interface(struct interface *ifp) | |
3308 | { | |
045c5389 RW |
3309 | struct rip_interface *ri = ifp->info; |
3310 | struct rip *rip = ri->rip; | |
d62a17ae | 3311 | struct distribute *dist; |
3312 | ||
03a38493 PG |
3313 | if (!rip) |
3314 | return; | |
3315 | dist = distribute_lookup(rip->distribute_ctx, ifp->name); | |
d62a17ae | 3316 | if (dist) |
03a38493 | 3317 | rip_distribute_update(rip->distribute_ctx, dist); |
718e3744 | 3318 | } |
3319 | ||
3320 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3321 | /* ARGSUSED */ |
d62a17ae | 3322 | static void rip_distribute_update_all(struct prefix_list *notused) |
718e3744 | 3323 | { |
f4e14fdb | 3324 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 3325 | struct interface *ifp; |
718e3744 | 3326 | |
451fda4f | 3327 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3328 | rip_distribute_update_interface(ifp); |
718e3744 | 3329 | } |
11dde9c2 | 3330 | /* ARGSUSED */ |
d62a17ae | 3331 | static void rip_distribute_update_all_wrapper(struct access_list *notused) |
11dde9c2 | 3332 | { |
d62a17ae | 3333 | rip_distribute_update_all(NULL); |
11dde9c2 | 3334 | } |
6b0655a2 | 3335 | |
718e3744 | 3336 | /* Delete all added rip route. */ |
045c5389 | 3337 | void rip_clean(struct rip *rip) |
718e3744 | 3338 | { |
eb6b3885 IR |
3339 | rip_interfaces_clean(rip); |
3340 | ||
ae7b826a RW |
3341 | if (rip->enabled) |
3342 | rip_instance_disable(rip); | |
d62a17ae | 3343 | |
2d2eaa13 | 3344 | stream_free(rip->obuf); |
d62a17ae | 3345 | |
2d2eaa13 | 3346 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) |
f9120f71 RW |
3347 | if (rip->redist[i].route_map.name) |
3348 | free(rip->redist[i].route_map.name); | |
2d2eaa13 RW |
3349 | |
3350 | route_table_finish(rip->table); | |
3351 | route_table_finish(rip->neighbor); | |
711915d2 | 3352 | list_delete(&rip->peer_list); |
2d2eaa13 | 3353 | distribute_list_delete(&rip->distribute_ctx); |
8f88441d | 3354 | if_rmap_ctx_delete(rip->if_rmap_ctx); |
d62a17ae | 3355 | |
045c5389 RW |
3356 | rip_clean_network(rip); |
3357 | rip_passive_nondefault_clean(rip); | |
ca046902 | 3358 | vector_free(rip->enable_interface); |
1205fdc4 | 3359 | route_table_finish(rip->enable_network); |
5a29c0d5 | 3360 | vector_free(rip->passive_nondefault); |
3f21c8c4 | 3361 | list_delete(&rip->offset_list_master); |
2826309c | 3362 | route_table_finish(rip->distance_table); |
045c5389 | 3363 | |
ae7b826a RW |
3364 | RB_REMOVE(rip_instance_head, &rip_instances, rip); |
3365 | XFREE(MTYPE_RIP_VRF_NAME, rip->vrf_name); | |
2d2eaa13 | 3366 | XFREE(MTYPE_RIP, rip); |
718e3744 | 3367 | } |
3368 | ||
4b23867c PG |
3369 | static void rip_if_rmap_update(struct if_rmap_ctx *ctx, |
3370 | struct if_rmap *if_rmap) | |
16705130 | 3371 | { |
aec0d756 | 3372 | struct interface *ifp = NULL; |
d62a17ae | 3373 | struct rip_interface *ri; |
3374 | struct route_map *rmap; | |
aec0d756 | 3375 | struct vrf *vrf = NULL; |
16705130 | 3376 | |
aec0d756 PG |
3377 | if (ctx->name) |
3378 | vrf = vrf_lookup_by_name(ctx->name); | |
3379 | if (vrf) | |
a36898e7 | 3380 | ifp = if_lookup_by_name(if_rmap->ifname, vrf->vrf_id); |
d62a17ae | 3381 | if (ifp == NULL) |
3382 | return; | |
16705130 | 3383 | |
d62a17ae | 3384 | ri = ifp->info; |
d62a17ae | 3385 | if (if_rmap->routemap[IF_RMAP_IN]) { |
3386 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
3387 | if (rmap) | |
3388 | ri->routemap[IF_RMAP_IN] = rmap; | |
3389 | else | |
3390 | ri->routemap[IF_RMAP_IN] = NULL; | |
3391 | } else | |
3392 | ri->routemap[RIP_FILTER_IN] = NULL; | |
16705130 | 3393 | |
d62a17ae | 3394 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
3395 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
3396 | if (rmap) | |
3397 | ri->routemap[IF_RMAP_OUT] = rmap; | |
3398 | else | |
3399 | ri->routemap[IF_RMAP_OUT] = NULL; | |
3400 | } else | |
3401 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
16705130 | 3402 | } |
3403 | ||
d62a17ae | 3404 | void rip_if_rmap_update_interface(struct interface *ifp) |
16705130 | 3405 | { |
8f88441d RW |
3406 | struct rip_interface *ri = ifp->info; |
3407 | struct rip *rip = ri->rip; | |
d62a17ae | 3408 | struct if_rmap *if_rmap; |
4b23867c | 3409 | struct if_rmap_ctx *ctx; |
16705130 | 3410 | |
4b23867c PG |
3411 | if (!rip) |
3412 | return; | |
4b23867c PG |
3413 | ctx = rip->if_rmap_ctx; |
3414 | if (!ctx) | |
3415 | return; | |
3416 | if_rmap = if_rmap_lookup(ctx, ifp->name); | |
d62a17ae | 3417 | if (if_rmap) |
4b23867c | 3418 | rip_if_rmap_update(ctx, if_rmap); |
16705130 | 3419 | } |
3420 | ||
045c5389 | 3421 | static void rip_routemap_update_redistribute(struct rip *rip) |
16705130 | 3422 | { |
045c5389 | 3423 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
8f88441d | 3424 | if (rip->redist[i].route_map.name) { |
f9120f71 RW |
3425 | rip->redist[i].route_map.map = route_map_lookup_by_name( |
3426 | rip->redist[i].route_map.name); | |
8f88441d RW |
3427 | route_map_counter_increment( |
3428 | rip->redist[i].route_map.map); | |
d62a17ae | 3429 | } |
16705130 | 3430 | } |
16705130 | 3431 | } |
3432 | ||
11dde9c2 | 3433 | /* ARGSUSED */ |
d62a17ae | 3434 | static void rip_routemap_update(const char *notused) |
16705130 | 3435 | { |
f4e14fdb | 3436 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
045c5389 | 3437 | struct rip *rip; |
d62a17ae | 3438 | struct interface *ifp; |
16705130 | 3439 | |
451fda4f | 3440 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3441 | rip_if_rmap_update_interface(ifp); |
16705130 | 3442 | |
045c5389 RW |
3443 | rip = vrf->info; |
3444 | if (rip) | |
3445 | rip_routemap_update_redistribute(rip); | |
16705130 | 3446 | } |
3447 | ||
ae7b826a RW |
3448 | /* Link RIP instance to VRF. */ |
3449 | static void rip_vrf_link(struct rip *rip, struct vrf *vrf) | |
3450 | { | |
3451 | struct interface *ifp; | |
3452 | ||
3453 | rip->vrf = vrf; | |
3454 | rip->distribute_ctx->vrf = vrf; | |
3455 | vrf->info = rip; | |
3456 | ||
3457 | FOR_ALL_INTERFACES (vrf, ifp) | |
3458 | rip_interface_sync(ifp); | |
3459 | } | |
3460 | ||
3461 | /* Unlink RIP instance from VRF. */ | |
3462 | static void rip_vrf_unlink(struct rip *rip, struct vrf *vrf) | |
3463 | { | |
3464 | struct interface *ifp; | |
3465 | ||
3466 | rip->vrf = NULL; | |
3467 | rip->distribute_ctx->vrf = NULL; | |
3468 | vrf->info = NULL; | |
3469 | ||
3470 | FOR_ALL_INTERFACES (vrf, ifp) | |
3471 | rip_interface_sync(ifp); | |
3472 | } | |
3473 | ||
3474 | static void rip_instance_enable(struct rip *rip, struct vrf *vrf, int sock) | |
3475 | { | |
3476 | rip->sock = sock; | |
3477 | ||
3478 | rip_vrf_link(rip, vrf); | |
3479 | rip->enabled = true; | |
3480 | ||
f9120f71 RW |
3481 | /* Resend all redistribute requests. */ |
3482 | rip_redistribute_enable(rip); | |
3483 | ||
ae7b826a RW |
3484 | /* Create read and timer thread. */ |
3485 | rip_event(rip, RIP_READ, rip->sock); | |
3486 | rip_event(rip, RIP_UPDATE_EVENT, 1); | |
3487 | ||
3488 | rip_zebra_vrf_register(vrf); | |
3489 | } | |
3490 | ||
3491 | static void rip_instance_disable(struct rip *rip) | |
3492 | { | |
3493 | struct vrf *vrf = rip->vrf; | |
3494 | struct route_node *rp; | |
3495 | ||
3496 | /* Clear RIP routes */ | |
3497 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { | |
3498 | struct rip_info *rinfo; | |
3499 | struct list *list; | |
3500 | struct listnode *listnode; | |
3501 | ||
3502 | if ((list = rp->info) == NULL) | |
3503 | continue; | |
3504 | ||
3505 | rinfo = listgetdata(listhead(list)); | |
3506 | if (rip_route_rte(rinfo)) | |
3507 | rip_zebra_ipv4_delete(rip, rp); | |
3508 | ||
3509 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
580e37a3 DS |
3510 | THREAD_OFF(rinfo->t_timeout); |
3511 | THREAD_OFF(rinfo->t_garbage_collect); | |
ae7b826a RW |
3512 | rip_info_free(rinfo); |
3513 | } | |
3514 | list_delete(&list); | |
3515 | rp->info = NULL; | |
3516 | route_unlock_node(rp); | |
3517 | } | |
3518 | ||
f9120f71 RW |
3519 | /* Flush all redistribute requests. */ |
3520 | rip_redistribute_disable(rip); | |
3521 | ||
ae7b826a | 3522 | /* Cancel RIP related timers. */ |
580e37a3 DS |
3523 | THREAD_OFF(rip->t_update); |
3524 | THREAD_OFF(rip->t_triggered_update); | |
3525 | THREAD_OFF(rip->t_triggered_interval); | |
ae7b826a RW |
3526 | |
3527 | /* Cancel read thread. */ | |
f6499a76 | 3528 | THREAD_OFF(rip->t_read); |
ae7b826a RW |
3529 | |
3530 | /* Close RIP socket. */ | |
3531 | close(rip->sock); | |
3532 | rip->sock = -1; | |
3533 | ||
3534 | /* Clear existing peers. */ | |
3535 | list_delete_all_node(rip->peer_list); | |
3536 | ||
3537 | rip_zebra_vrf_deregister(vrf); | |
3538 | ||
3539 | rip_vrf_unlink(rip, vrf); | |
3540 | rip->enabled = false; | |
3541 | } | |
3542 | ||
3543 | static int rip_vrf_new(struct vrf *vrf) | |
3544 | { | |
3545 | if (IS_RIP_DEBUG_EVENT) | |
3546 | zlog_debug("%s: VRF created: %s(%u)", __func__, vrf->name, | |
3547 | vrf->vrf_id); | |
3548 | ||
3549 | return 0; | |
3550 | } | |
3551 | ||
3552 | static int rip_vrf_delete(struct vrf *vrf) | |
3553 | { | |
3d1588d8 DS |
3554 | struct rip *rip; |
3555 | ||
ae7b826a RW |
3556 | if (IS_RIP_DEBUG_EVENT) |
3557 | zlog_debug("%s: VRF deleted: %s(%u)", __func__, vrf->name, | |
3558 | vrf->vrf_id); | |
3559 | ||
3d1588d8 DS |
3560 | rip = rip_lookup_by_vrf_name(vrf->name); |
3561 | if (!rip) | |
3562 | return 0; | |
3563 | ||
3564 | rip_clean(rip); | |
3565 | ||
ae7b826a RW |
3566 | return 0; |
3567 | } | |
3568 | ||
3569 | static int rip_vrf_enable(struct vrf *vrf) | |
3570 | { | |
3571 | struct rip *rip; | |
3572 | int socket; | |
3573 | ||
3574 | rip = rip_lookup_by_vrf_name(vrf->name); | |
3575 | if (!rip || rip->enabled) | |
3576 | return 0; | |
3577 | ||
3578 | if (IS_RIP_DEBUG_EVENT) | |
3579 | zlog_debug("%s: VRF %s(%u) enabled", __func__, vrf->name, | |
3580 | vrf->vrf_id); | |
3581 | ||
3582 | /* Activate the VRF RIP instance. */ | |
3583 | if (!rip->enabled) { | |
3584 | socket = rip_create_socket(vrf); | |
3585 | if (socket < 0) | |
3586 | return -1; | |
3587 | ||
3588 | rip_instance_enable(rip, vrf, socket); | |
3589 | } | |
3590 | ||
3591 | return 0; | |
3592 | } | |
3593 | ||
3594 | static int rip_vrf_disable(struct vrf *vrf) | |
3595 | { | |
3596 | struct rip *rip; | |
3597 | ||
3598 | rip = rip_lookup_by_vrf_name(vrf->name); | |
3599 | if (!rip || !rip->enabled) | |
3600 | return 0; | |
3601 | ||
3602 | if (IS_RIP_DEBUG_EVENT) | |
3603 | zlog_debug("%s: VRF %s(%u) disabled", __func__, vrf->name, | |
3604 | vrf->vrf_id); | |
3605 | ||
3606 | /* Deactivate the VRF RIP instance. */ | |
3607 | if (rip->enabled) | |
3608 | rip_instance_disable(rip); | |
3609 | ||
3610 | return 0; | |
3611 | } | |
3612 | ||
3613 | void rip_vrf_init(void) | |
3614 | { | |
ac2cb9bf | 3615 | vrf_init(rip_vrf_new, rip_vrf_enable, rip_vrf_disable, rip_vrf_delete); |
f5eef2d5 | 3616 | |
cfc369c4 | 3617 | vrf_cmd_init(NULL); |
ae7b826a RW |
3618 | } |
3619 | ||
3620 | void rip_vrf_terminate(void) | |
3621 | { | |
3622 | vrf_terminate(); | |
3623 | } | |
3624 | ||
718e3744 | 3625 | /* Allocate new rip structure and set default value. */ |
d62a17ae | 3626 | void rip_init(void) |
3627 | { | |
3628 | /* Install top nodes. */ | |
612c2c15 | 3629 | install_node(&rip_node); |
d62a17ae | 3630 | |
3631 | /* Install rip commands. */ | |
3632 | install_element(VIEW_NODE, &show_ip_rip_cmd); | |
3633 | install_element(VIEW_NODE, &show_ip_rip_status_cmd); | |
d62a17ae | 3634 | |
3635 | install_default(RIP_NODE); | |
d62a17ae | 3636 | |
3637 | /* Debug related init. */ | |
3638 | rip_debug_init(); | |
3639 | ||
3640 | /* Access list install. */ | |
3641 | access_list_init(); | |
3642 | access_list_add_hook(rip_distribute_update_all_wrapper); | |
3643 | access_list_delete_hook(rip_distribute_update_all_wrapper); | |
3644 | ||
3645 | /* Prefix list initialize.*/ | |
3646 | prefix_list_init(); | |
3647 | prefix_list_add_hook(rip_distribute_update_all); | |
3648 | prefix_list_delete_hook(rip_distribute_update_all); | |
3649 | ||
d62a17ae | 3650 | /* Route-map */ |
3651 | rip_route_map_init(); | |
d62a17ae | 3652 | |
3653 | route_map_add_hook(rip_routemap_update); | |
3654 | route_map_delete_hook(rip_routemap_update); | |
3655 | ||
3656 | if_rmap_init(RIP_NODE); | |
718e3744 | 3657 | } |