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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" | |
c1a03d47 | 40 | #include "md5.h" |
718e3744 | 41 | #include "keychain.h" |
edd7c245 | 42 | #include "privs.h" |
77cbe4a1 | 43 | #include "lib_errors.h" |
8c9226c2 | 44 | #include "northbound_cli.h" |
718e3744 | 45 | |
46 | #include "ripd/ripd.h" | |
47 | #include "ripd/rip_debug.h" | |
518e377f | 48 | #include "ripd/rip_errors.h" |
718e3744 | 49 | |
0b3acf4f | 50 | /* UDP receive buffer size */ |
51 | #define RIP_UDP_RCV_BUF 41600 | |
52 | ||
718e3744 | 53 | /* Prototypes. */ |
d62a17ae | 54 | static void rip_output_process(struct connected *, struct sockaddr_in *, int, |
d7c0a89a | 55 | uint8_t); |
d62a17ae | 56 | static int rip_triggered_update(struct thread *); |
57 | static int rip_update_jitter(unsigned long); | |
2826309c RW |
58 | static void rip_distance_table_node_cleanup(struct route_table *table, |
59 | struct route_node *node); | |
6b0655a2 | 60 | |
03a38493 PG |
61 | static void rip_distribute_update(struct distribute_ctx *ctx, |
62 | struct distribute *dist); | |
63 | ||
718e3744 | 64 | /* RIP output routes type. */ |
d62a17ae | 65 | enum { rip_all_route, rip_changed_route }; |
6b0655a2 | 66 | |
718e3744 | 67 | /* RIP command strings. */ |
d62a17ae | 68 | static const struct message rip_msg[] = {{RIP_REQUEST, "REQUEST"}, |
69 | {RIP_RESPONSE, "RESPONSE"}, | |
70 | {RIP_TRACEON, "TRACEON"}, | |
71 | {RIP_TRACEOFF, "TRACEOFF"}, | |
72 | {RIP_POLL, "POLL"}, | |
73 | {RIP_POLL_ENTRY, "POLL ENTRY"}, | |
74 | {0}}; | |
6b0655a2 | 75 | |
718e3744 | 76 | /* Utility function to set boradcast option to the socket. */ |
d62a17ae | 77 | static int sockopt_broadcast(int sock) |
718e3744 | 78 | { |
d62a17ae | 79 | int ret; |
80 | int on = 1; | |
718e3744 | 81 | |
d62a17ae | 82 | ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&on, |
83 | sizeof on); | |
84 | if (ret < 0) { | |
85 | zlog_warn("can't set sockopt SO_BROADCAST to socket %d", sock); | |
86 | return -1; | |
87 | } | |
88 | return 0; | |
718e3744 | 89 | } |
90 | ||
1137aef4 | 91 | int rip_route_rte(struct rip_info *rinfo) |
718e3744 | 92 | { |
d62a17ae | 93 | return (rinfo->type == ZEBRA_ROUTE_RIP |
94 | && rinfo->sub_type == RIP_ROUTE_RTE); | |
718e3744 | 95 | } |
96 | ||
d62a17ae | 97 | static struct rip_info *rip_info_new(void) |
718e3744 | 98 | { |
d62a17ae | 99 | return XCALLOC(MTYPE_RIP_INFO, sizeof(struct rip_info)); |
718e3744 | 100 | } |
101 | ||
d62a17ae | 102 | void rip_info_free(struct rip_info *rinfo) |
718e3744 | 103 | { |
d62a17ae | 104 | XFREE(MTYPE_RIP_INFO, rinfo); |
718e3744 | 105 | } |
106 | ||
045c5389 RW |
107 | struct rip *rip_info_get_instance(const struct rip_info *rinfo) |
108 | { | |
109 | return route_table_get_info(rinfo->rp->table); | |
110 | } | |
111 | ||
718e3744 | 112 | /* RIP route garbage collect timer. */ |
d62a17ae | 113 | static int rip_garbage_collect(struct thread *t) |
718e3744 | 114 | { |
d62a17ae | 115 | struct rip_info *rinfo; |
116 | struct route_node *rp; | |
117 | ||
118 | rinfo = THREAD_ARG(t); | |
119 | rinfo->t_garbage_collect = NULL; | |
718e3744 | 120 | |
d62a17ae | 121 | /* Off timeout timer. */ |
122 | RIP_TIMER_OFF(rinfo->t_timeout); | |
718e3744 | 123 | |
d62a17ae | 124 | /* Get route_node pointer. */ |
125 | rp = rinfo->rp; | |
718e3744 | 126 | |
d62a17ae | 127 | /* Unlock route_node. */ |
128 | listnode_delete(rp->info, rinfo); | |
129 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 130 | list_delete((struct list **)&rp->info); |
d62a17ae | 131 | route_unlock_node(rp); |
132 | } | |
718e3744 | 133 | |
d62a17ae | 134 | /* Free RIP routing information. */ |
135 | rip_info_free(rinfo); | |
718e3744 | 136 | |
d62a17ae | 137 | return 0; |
718e3744 | 138 | } |
139 | ||
045c5389 | 140 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo); |
bce8e868 LF |
141 | |
142 | /* Add new route to the ECMP list. | |
8478ae7e LF |
143 | * RETURN: the new entry added in the list, or NULL if it is not the first |
144 | * entry and ECMP is not allowed. | |
bce8e868 | 145 | */ |
045c5389 | 146 | struct rip_info *rip_ecmp_add(struct rip *rip, struct rip_info *rinfo_new) |
718e3744 | 147 | { |
d62a17ae | 148 | struct route_node *rp = rinfo_new->rp; |
149 | struct rip_info *rinfo = NULL; | |
150 | struct list *list = NULL; | |
718e3744 | 151 | |
d62a17ae | 152 | if (rp->info == NULL) |
153 | rp->info = list_new(); | |
154 | list = (struct list *)rp->info; | |
bce8e868 | 155 | |
d62a17ae | 156 | /* If ECMP is not allowed and some entry already exists in the list, |
157 | * do nothing. */ | |
158 | if (listcount(list) && !rip->ecmp) | |
159 | return NULL; | |
8478ae7e | 160 | |
d62a17ae | 161 | rinfo = rip_info_new(); |
162 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
163 | listnode_add(list, rinfo); | |
bce8e868 | 164 | |
d62a17ae | 165 | if (rip_route_rte(rinfo)) { |
045c5389 RW |
166 | rip_timeout_update(rip, rinfo); |
167 | rip_zebra_ipv4_add(rip, rp); | |
d62a17ae | 168 | } |
bce8e868 | 169 | |
d62a17ae | 170 | /* Set the route change flag on the first entry. */ |
171 | rinfo = listgetdata(listhead(list)); | |
172 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 173 | |
d62a17ae | 174 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 175 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 176 | |
d62a17ae | 177 | return rinfo; |
bce8e868 LF |
178 | } |
179 | ||
180 | /* Replace the ECMP list with the new route. | |
181 | * RETURN: the new entry added in the list | |
182 | */ | |
045c5389 | 183 | struct rip_info *rip_ecmp_replace(struct rip *rip, struct rip_info *rinfo_new) |
d62a17ae | 184 | { |
185 | struct route_node *rp = rinfo_new->rp; | |
186 | struct list *list = (struct list *)rp->info; | |
187 | struct rip_info *rinfo = NULL, *tmp_rinfo = NULL; | |
188 | struct listnode *node = NULL, *nextnode = NULL; | |
189 | ||
190 | if (list == NULL || listcount(list) == 0) | |
045c5389 | 191 | return rip_ecmp_add(rip, rinfo_new); |
d62a17ae | 192 | |
193 | /* Get the first entry */ | |
194 | rinfo = listgetdata(listhead(list)); | |
195 | ||
196 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
197 | if (rip_route_rte(rinfo) && !rip_route_rte(rinfo_new)) | |
198 | if (CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 199 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 200 | |
201 | /* Re-use the first entry, and delete the others. */ | |
202 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
203 | if (tmp_rinfo != rinfo) { | |
204 | RIP_TIMER_OFF(tmp_rinfo->t_timeout); | |
205 | RIP_TIMER_OFF(tmp_rinfo->t_garbage_collect); | |
206 | list_delete_node(list, node); | |
207 | rip_info_free(tmp_rinfo); | |
208 | } | |
718e3744 | 209 | |
d62a17ae | 210 | RIP_TIMER_OFF(rinfo->t_timeout); |
211 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
212 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
718e3744 | 213 | |
d62a17ae | 214 | if (rip_route_rte(rinfo)) { |
045c5389 | 215 | rip_timeout_update(rip, rinfo); |
d62a17ae | 216 | /* The ADD message implies an update. */ |
045c5389 | 217 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 218 | } |
718e3744 | 219 | |
d62a17ae | 220 | /* Set the route change flag. */ |
221 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
718e3744 | 222 | |
d62a17ae | 223 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 224 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 225 | |
d62a17ae | 226 | return rinfo; |
bce8e868 LF |
227 | } |
228 | ||
229 | /* Delete one route from the ECMP list. | |
230 | * RETURN: | |
231 | * null - the entry is freed, and other entries exist in the list | |
232 | * the entry - the entry is the last one in the list; its metric is set | |
233 | * to INFINITY, and the garbage collector is started for it | |
234 | */ | |
045c5389 | 235 | struct rip_info *rip_ecmp_delete(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 236 | { |
237 | struct route_node *rp = rinfo->rp; | |
238 | struct list *list = (struct list *)rp->info; | |
239 | ||
240 | RIP_TIMER_OFF(rinfo->t_timeout); | |
241 | ||
242 | if (listcount(list) > 1) { | |
243 | /* Some other ECMP entries still exist. Just delete this entry. | |
244 | */ | |
245 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
246 | listnode_delete(list, rinfo); | |
247 | if (rip_route_rte(rinfo) | |
248 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
249 | /* The ADD message implies the update. */ | |
045c5389 | 250 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 251 | rip_info_free(rinfo); |
252 | rinfo = NULL; | |
253 | } else { | |
254 | assert(rinfo == listgetdata(listhead(list))); | |
255 | ||
256 | /* This is the only entry left in the list. We must keep it in | |
257 | * the list for garbage collection time, with INFINITY metric. | |
258 | */ | |
259 | ||
260 | rinfo->metric = RIP_METRIC_INFINITY; | |
261 | RIP_TIMER_ON(rinfo->t_garbage_collect, rip_garbage_collect, | |
262 | rip->garbage_time); | |
263 | ||
264 | if (rip_route_rte(rinfo) | |
265 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 266 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 267 | } |
bce8e868 | 268 | |
d62a17ae | 269 | /* Set the route change flag on the first entry. */ |
270 | rinfo = listgetdata(listhead(list)); | |
271 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 272 | |
d62a17ae | 273 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 274 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
bce8e868 | 275 | |
d62a17ae | 276 | return rinfo; |
bce8e868 LF |
277 | } |
278 | ||
279 | /* Timeout RIP routes. */ | |
d62a17ae | 280 | static int rip_timeout(struct thread *t) |
bce8e868 | 281 | { |
045c5389 RW |
282 | struct rip_info *rinfo = THREAD_ARG(t); |
283 | struct rip *rip = rip_info_get_instance(rinfo); | |
284 | ||
285 | rip_ecmp_delete(rip, rinfo); | |
286 | ||
d62a17ae | 287 | return 0; |
718e3744 | 288 | } |
289 | ||
045c5389 | 290 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo) |
718e3744 | 291 | { |
d62a17ae | 292 | if (rinfo->metric != RIP_METRIC_INFINITY) { |
293 | RIP_TIMER_OFF(rinfo->t_timeout); | |
045c5389 RW |
294 | thread_add_timer(master, rip_timeout, rinfo, rip->timeout_time, |
295 | &rinfo->t_timeout); | |
d62a17ae | 296 | } |
297 | } | |
298 | ||
299 | static int rip_filter(int rip_distribute, struct prefix_ipv4 *p, | |
300 | struct rip_interface *ri) | |
301 | { | |
302 | struct distribute *dist; | |
303 | struct access_list *alist; | |
304 | struct prefix_list *plist; | |
305 | int distribute = rip_distribute == RIP_FILTER_OUT ? DISTRIBUTE_V4_OUT | |
306 | : DISTRIBUTE_V4_IN; | |
307 | const char *inout = rip_distribute == RIP_FILTER_OUT ? "out" : "in"; | |
308 | ||
309 | /* Input distribute-list filtering. */ | |
310 | if (ri->list[rip_distribute]) { | |
311 | if (access_list_apply(ri->list[rip_distribute], | |
312 | (struct prefix *)p) | |
313 | == FILTER_DENY) { | |
314 | if (IS_RIP_DEBUG_PACKET) | |
315 | zlog_debug("%s/%d filtered by distribute %s", | |
316 | inet_ntoa(p->prefix), p->prefixlen, | |
317 | inout); | |
318 | return -1; | |
718e3744 | 319 | } |
718e3744 | 320 | } |
d62a17ae | 321 | if (ri->prefix[rip_distribute]) { |
322 | if (prefix_list_apply(ri->prefix[rip_distribute], | |
323 | (struct prefix *)p) | |
324 | == PREFIX_DENY) { | |
325 | if (IS_RIP_DEBUG_PACKET) | |
326 | zlog_debug("%s/%d filtered by prefix-list %s", | |
327 | inet_ntoa(p->prefix), p->prefixlen, | |
328 | inout); | |
329 | return -1; | |
718e3744 | 330 | } |
718e3744 | 331 | } |
d62a17ae | 332 | |
333 | /* All interface filter check. */ | |
045c5389 | 334 | dist = distribute_lookup(ri->rip->distribute_ctx, NULL); |
d62a17ae | 335 | if (dist) { |
336 | if (dist->list[distribute]) { | |
337 | alist = access_list_lookup(AFI_IP, | |
338 | dist->list[distribute]); | |
339 | ||
340 | if (alist) { | |
341 | if (access_list_apply(alist, (struct prefix *)p) | |
342 | == FILTER_DENY) { | |
343 | if (IS_RIP_DEBUG_PACKET) | |
344 | zlog_debug( | |
345 | "%s/%d filtered by distribute %s", | |
346 | inet_ntoa(p->prefix), | |
347 | p->prefixlen, inout); | |
348 | return -1; | |
349 | } | |
350 | } | |
351 | } | |
352 | if (dist->prefix[distribute]) { | |
353 | plist = prefix_list_lookup(AFI_IP, | |
354 | dist->prefix[distribute]); | |
355 | ||
356 | if (plist) { | |
357 | if (prefix_list_apply(plist, (struct prefix *)p) | |
358 | == PREFIX_DENY) { | |
359 | if (IS_RIP_DEBUG_PACKET) | |
360 | zlog_debug( | |
361 | "%s/%d filtered by prefix-list %s", | |
362 | inet_ntoa(p->prefix), | |
363 | p->prefixlen, inout); | |
364 | return -1; | |
365 | } | |
366 | } | |
367 | } | |
368 | } | |
369 | return 0; | |
718e3744 | 370 | } |
371 | ||
372 | /* Check nexthop address validity. */ | |
045c5389 | 373 | static int rip_nexthop_check(struct rip *rip, struct in_addr *addr) |
718e3744 | 374 | { |
045c5389 | 375 | struct vrf *vrf = vrf_lookup_by_id(rip->vrf_id); |
d62a17ae | 376 | struct interface *ifp; |
f4e14fdb | 377 | struct listnode *cnode; |
d62a17ae | 378 | struct connected *ifc; |
379 | struct prefix *p; | |
718e3744 | 380 | |
d62a17ae | 381 | /* If nexthop address matches local configured address then it is |
382 | invalid nexthop. */ | |
b2d7c082 | 383 | |
451fda4f | 384 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 385 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, ifc)) { |
386 | p = ifc->address; | |
718e3744 | 387 | |
d62a17ae | 388 | if (p->family == AF_INET |
389 | && IPV4_ADDR_SAME(&p->u.prefix4, addr)) | |
390 | return -1; | |
391 | } | |
718e3744 | 392 | } |
d62a17ae | 393 | return 0; |
718e3744 | 394 | } |
395 | ||
396 | /* RIP add route to routing table. */ | |
d62a17ae | 397 | static void rip_rte_process(struct rte *rte, struct sockaddr_in *from, |
398 | struct interface *ifp) | |
399 | { | |
045c5389 | 400 | struct rip *rip; |
d62a17ae | 401 | int ret; |
402 | struct prefix_ipv4 p; | |
403 | struct route_node *rp; | |
404 | struct rip_info *rinfo = NULL, newinfo; | |
405 | struct rip_interface *ri; | |
406 | struct in_addr *nexthop; | |
407 | int same = 0; | |
408 | unsigned char old_dist, new_dist; | |
409 | struct list *list = NULL; | |
410 | struct listnode *node = NULL; | |
411 | ||
412 | /* Make prefix structure. */ | |
413 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
414 | p.family = AF_INET; | |
415 | p.prefix = rte->prefix; | |
416 | p.prefixlen = ip_masklen(rte->mask); | |
417 | ||
418 | /* Make sure mask is applied. */ | |
419 | apply_mask_ipv4(&p); | |
420 | ||
d62a17ae | 421 | ri = ifp->info; |
045c5389 | 422 | rip = ri->rip; |
718e3744 | 423 | |
045c5389 | 424 | /* Apply input filters. */ |
d62a17ae | 425 | ret = rip_filter(RIP_FILTER_IN, &p, ri); |
426 | if (ret < 0) | |
427 | return; | |
428 | ||
429 | memset(&newinfo, 0, sizeof(newinfo)); | |
430 | newinfo.type = ZEBRA_ROUTE_RIP; | |
431 | newinfo.sub_type = RIP_ROUTE_RTE; | |
dd127197 | 432 | newinfo.nh.gate.ipv4 = rte->nexthop; |
d62a17ae | 433 | newinfo.from = from->sin_addr; |
dd127197 DS |
434 | newinfo.nh.ifindex = ifp->ifindex; |
435 | newinfo.nh.type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
d62a17ae | 436 | newinfo.metric = rte->metric; |
437 | newinfo.metric_out = rte->metric; /* XXX */ | |
438 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
439 | ||
440 | /* Modify entry according to the interface routemap. */ | |
441 | if (ri->routemap[RIP_FILTER_IN]) { | |
d62a17ae | 442 | /* The object should be of the type of rip_info */ |
443 | ret = route_map_apply(ri->routemap[RIP_FILTER_IN], | |
444 | (struct prefix *)&p, RMAP_RIP, &newinfo); | |
445 | ||
446 | if (ret == RMAP_DENYMATCH) { | |
447 | if (IS_RIP_DEBUG_PACKET) | |
448 | zlog_debug( | |
449 | "RIP %s/%d is filtered by route-map in", | |
450 | inet_ntoa(p.prefix), p.prefixlen); | |
451 | return; | |
452 | } | |
453 | ||
454 | /* Get back the object */ | |
455 | rte->nexthop = newinfo.nexthop_out; | |
456 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
996c9314 LB |
457 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the |
458 | metric_out field */ | |
d62a17ae | 459 | } |
460 | ||
461 | /* Once the entry has been validated, update the metric by | |
462 | adding the cost of the network on wich the message | |
463 | arrived. If the result is greater than infinity, use infinity | |
464 | (RFC2453 Sec. 3.9.2) */ | |
465 | /* Zebra ripd can handle offset-list in. */ | |
466 | ret = rip_offset_list_apply_in(&p, ifp, &rte->metric); | |
718e3744 | 467 | |
d62a17ae | 468 | /* If offset-list does not modify the metric use interface's |
469 | metric. */ | |
470 | if (!ret) | |
471 | rte->metric += ifp->metric ? ifp->metric : 1; | |
718e3744 | 472 | |
d62a17ae | 473 | if (rte->metric > RIP_METRIC_INFINITY) |
474 | rte->metric = RIP_METRIC_INFINITY; | |
475 | ||
476 | /* Set nexthop pointer. */ | |
477 | if (rte->nexthop.s_addr == 0) | |
478 | nexthop = &from->sin_addr; | |
479 | else | |
480 | nexthop = &rte->nexthop; | |
481 | ||
482 | /* Check if nexthop address is myself, then do nothing. */ | |
045c5389 | 483 | if (rip_nexthop_check(rip, nexthop) < 0) { |
d62a17ae | 484 | if (IS_RIP_DEBUG_PACKET) |
485 | zlog_debug("Nexthop address %s is myself", | |
486 | inet_ntoa(*nexthop)); | |
487 | return; | |
488 | } | |
489 | ||
490 | /* Get index for the prefix. */ | |
491 | rp = route_node_get(rip->table, (struct prefix *)&p); | |
492 | ||
493 | newinfo.rp = rp; | |
dd127197 DS |
494 | newinfo.nh.gate.ipv4 = *nexthop; |
495 | newinfo.nh.type = NEXTHOP_TYPE_IPV4; | |
d62a17ae | 496 | newinfo.metric = rte->metric; |
497 | newinfo.tag = ntohs(rte->tag); | |
045c5389 | 498 | newinfo.distance = rip_distance_apply(rip, &newinfo); |
d62a17ae | 499 | |
500 | new_dist = newinfo.distance ? newinfo.distance | |
501 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
502 | ||
503 | /* Check to see whether there is already RIP route on the table. */ | |
504 | if ((list = rp->info) != NULL) | |
505 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
506 | /* Need to compare with redistributed entry or local | |
507 | * entry */ | |
508 | if (!rip_route_rte(rinfo)) | |
509 | break; | |
510 | ||
511 | if (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 512 | && IPV4_ADDR_SAME(&rinfo->nh.gate.ipv4, nexthop)) |
d62a17ae | 513 | break; |
514 | ||
515 | if (!listnextnode(node)) { | |
516 | /* Not found in the list */ | |
517 | ||
518 | if (rte->metric > rinfo->metric) { | |
519 | /* New route has a greater metric. | |
520 | * Discard it. */ | |
521 | route_unlock_node(rp); | |
522 | return; | |
523 | } | |
524 | ||
525 | if (rte->metric < rinfo->metric) | |
526 | /* New route has a smaller metric. | |
527 | * Replace the ECMP list | |
528 | * with the new one in below. */ | |
529 | break; | |
530 | ||
531 | /* Metrics are same. We compare the distances. | |
532 | */ | |
533 | old_dist = rinfo->distance | |
534 | ? rinfo->distance | |
535 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
536 | ||
537 | if (new_dist > old_dist) { | |
538 | /* New route has a greater distance. | |
539 | * Discard it. */ | |
540 | route_unlock_node(rp); | |
541 | return; | |
542 | } | |
543 | ||
544 | if (new_dist < old_dist) | |
545 | /* New route has a smaller distance. | |
546 | * Replace the ECMP list | |
547 | * with the new one in below. */ | |
548 | break; | |
549 | ||
550 | /* Metrics and distances are both same. Keep | |
551 | * "rinfo" null and | |
552 | * the new route is added in the ECMP list in | |
553 | * below. */ | |
554 | } | |
718e3744 | 555 | } |
d62a17ae | 556 | |
557 | if (rinfo) { | |
558 | /* Local static route. */ | |
559 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
560 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
561 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
562 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
563 | route_unlock_node(rp); | |
564 | return; | |
718e3744 | 565 | } |
d62a17ae | 566 | |
567 | /* Redistributed route check. */ | |
568 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
569 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
570 | old_dist = rinfo->distance; | |
571 | /* Only routes directly connected to an interface | |
572 | * (nexthop == 0) | |
573 | * may have a valid NULL distance */ | |
dd127197 | 574 | if (rinfo->nh.gate.ipv4.s_addr != 0) |
d62a17ae | 575 | old_dist = old_dist |
576 | ? old_dist | |
577 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
578 | /* If imported route does not have STRICT precedence, | |
579 | mark it as a ghost */ | |
580 | if (new_dist <= old_dist | |
581 | && rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 582 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 583 | |
584 | route_unlock_node(rp); | |
585 | return; | |
718e3744 | 586 | } |
d62a17ae | 587 | } |
588 | ||
589 | if (!rinfo) { | |
590 | if (rp->info) | |
591 | route_unlock_node(rp); | |
592 | ||
593 | /* Now, check to see whether there is already an explicit route | |
594 | for the destination prefix. If there is no such route, add | |
595 | this route to the routing table, unless the metric is | |
596 | infinity (there is no point in adding a route which | |
597 | unusable). */ | |
598 | if (rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 599 | rip_ecmp_add(rip, &newinfo); |
d62a17ae | 600 | } else { |
601 | /* Route is there but we are not sure the route is RIP or not. | |
602 | */ | |
603 | ||
604 | /* If there is an existing route, compare the next hop address | |
605 | to the address of the router from which the datagram came. | |
606 | If this datagram is from the same router as the existing | |
607 | route, reinitialize the timeout. */ | |
608 | same = (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 609 | && (rinfo->nh.ifindex == ifp->ifindex)); |
d62a17ae | 610 | |
611 | old_dist = rinfo->distance ? rinfo->distance | |
612 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
613 | ||
614 | /* Next, compare the metrics. If the datagram is from the same | |
615 | router as the existing route, and the new metric is different | |
616 | than the old one; or, if the new metric is lower than the old | |
617 | one, or if the tag has been changed; or if there is a route | |
618 | with a lower administrave distance; or an update of the | |
619 | distance on the actual route; do the following actions: */ | |
620 | if ((same && rinfo->metric != rte->metric) | |
621 | || (rte->metric < rinfo->metric) | |
622 | || ((same) && (rinfo->metric == rte->metric) | |
623 | && (newinfo.tag != rinfo->tag)) | |
624 | || (old_dist > new_dist) | |
625 | || ((old_dist != new_dist) && same)) { | |
626 | if (listcount(list) == 1) { | |
627 | if (newinfo.metric != RIP_METRIC_INFINITY) | |
045c5389 | 628 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 629 | else |
045c5389 | 630 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 631 | } else { |
632 | if (newinfo.metric < rinfo->metric) | |
045c5389 | 633 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 634 | else if (newinfo.metric > rinfo->metric) |
045c5389 | 635 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 636 | else if (new_dist < old_dist) |
045c5389 | 637 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 638 | else if (new_dist > old_dist) |
045c5389 | 639 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 640 | else { |
641 | int update = CHECK_FLAG(rinfo->flags, | |
642 | RIP_RTF_FIB) | |
643 | ? 1 | |
644 | : 0; | |
645 | ||
646 | assert(newinfo.metric | |
647 | != RIP_METRIC_INFINITY); | |
648 | ||
649 | RIP_TIMER_OFF(rinfo->t_timeout); | |
650 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
651 | memcpy(rinfo, &newinfo, | |
652 | sizeof(struct rip_info)); | |
045c5389 | 653 | rip_timeout_update(rip, rinfo); |
d62a17ae | 654 | |
655 | if (update) | |
045c5389 | 656 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 657 | |
658 | /* - Set the route change flag on the | |
659 | * first entry. */ | |
660 | rinfo = listgetdata(listhead(list)); | |
661 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
045c5389 | 662 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 663 | } |
664 | } | |
665 | } else /* same & no change */ | |
045c5389 | 666 | rip_timeout_update(rip, rinfo); |
d62a17ae | 667 | |
668 | /* Unlock tempolary lock of the route. */ | |
669 | route_unlock_node(rp); | |
670 | } | |
671 | } | |
672 | ||
673 | /* Dump RIP packet */ | |
674 | static void rip_packet_dump(struct rip_packet *packet, int size, | |
675 | const char *sndrcv) | |
676 | { | |
677 | caddr_t lim; | |
678 | struct rte *rte; | |
679 | const char *command_str; | |
680 | char pbuf[BUFSIZ], nbuf[BUFSIZ]; | |
d7c0a89a QY |
681 | uint8_t netmask = 0; |
682 | uint8_t *p; | |
d62a17ae | 683 | |
684 | /* Set command string. */ | |
685 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
686 | command_str = lookup_msg(rip_msg, packet->command, NULL); | |
687 | else | |
688 | command_str = "unknown"; | |
689 | ||
690 | /* Dump packet header. */ | |
691 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
692 | packet->version, size); | |
693 | ||
694 | /* Dump each routing table entry. */ | |
695 | rte = packet->rte; | |
696 | ||
697 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
698 | if (packet->version == RIPv2) { | |
699 | netmask = ip_masklen(rte->mask); | |
700 | ||
701 | if (rte->family == htons(RIP_FAMILY_AUTH)) { | |
702 | if (rte->tag | |
703 | == htons(RIP_AUTH_SIMPLE_PASSWORD)) { | |
d7c0a89a | 704 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 705 | |
706 | zlog_debug( | |
707 | " family 0x%X type %d auth string: %s", | |
708 | ntohs(rte->family), | |
709 | ntohs(rte->tag), p); | |
710 | } else if (rte->tag == htons(RIP_AUTH_MD5)) { | |
711 | struct rip_md5_info *md5; | |
712 | ||
713 | md5 = (struct rip_md5_info *)&packet | |
714 | ->rte; | |
715 | ||
716 | zlog_debug( | |
717 | " family 0x%X type %d (MD5 authentication)", | |
718 | ntohs(md5->family), | |
719 | ntohs(md5->type)); | |
720 | zlog_debug( | |
721 | " RIP-2 packet len %d Key ID %d" | |
722 | " Auth Data len %d", | |
723 | ntohs(md5->packet_len), | |
724 | md5->keyid, md5->auth_len); | |
d7c0a89a QY |
725 | zlog_debug(" Sequence Number %ld", |
726 | (unsigned long)ntohl( | |
727 | md5->sequence)); | |
d62a17ae | 728 | } else if (rte->tag == htons(RIP_AUTH_DATA)) { |
d7c0a89a | 729 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 730 | |
731 | zlog_debug( | |
732 | " family 0x%X type %d (MD5 data)", | |
733 | ntohs(rte->family), | |
734 | ntohs(rte->tag)); | |
735 | zlog_debug( | |
736 | " MD5: %02X%02X%02X%02X%02X%02X%02X%02X" | |
737 | "%02X%02X%02X%02X%02X%02X%02X%02X", | |
738 | p[0], p[1], p[2], p[3], p[4], | |
739 | p[5], p[6], p[7], p[8], p[9], | |
740 | p[10], p[11], p[12], p[13], | |
741 | p[14], p[15]); | |
742 | } else { | |
743 | zlog_debug( | |
744 | " family 0x%X type %d (Unknown auth type)", | |
745 | ntohs(rte->family), | |
746 | ntohs(rte->tag)); | |
747 | } | |
748 | } else | |
749 | zlog_debug( | |
750 | " %s/%d -> %s family %d tag %" ROUTE_TAG_PRI | |
751 | " metric %ld", | |
752 | inet_ntop(AF_INET, &rte->prefix, pbuf, | |
753 | BUFSIZ), | |
754 | netmask, | |
755 | inet_ntop(AF_INET, &rte->nexthop, nbuf, | |
756 | BUFSIZ), | |
757 | ntohs(rte->family), | |
758 | (route_tag_t)ntohs(rte->tag), | |
d7c0a89a | 759 | (unsigned long)ntohl(rte->metric)); |
d62a17ae | 760 | } else { |
761 | zlog_debug( | |
762 | " %s family %d tag %" ROUTE_TAG_PRI | |
763 | " metric %ld", | |
764 | inet_ntop(AF_INET, &rte->prefix, pbuf, BUFSIZ), | |
765 | ntohs(rte->family), | |
766 | (route_tag_t)ntohs(rte->tag), | |
d7c0a89a | 767 | (unsigned long)ntohl(rte->metric)); |
718e3744 | 768 | } |
718e3744 | 769 | } |
718e3744 | 770 | } |
771 | ||
772 | /* Check if the destination address is valid (unicast; not net 0 | |
773 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
774 | check net 0 because we accept default route. */ | |
d62a17ae | 775 | static int rip_destination_check(struct in_addr addr) |
718e3744 | 776 | { |
d7c0a89a | 777 | uint32_t destination; |
718e3744 | 778 | |
d62a17ae | 779 | /* Convert to host byte order. */ |
780 | destination = ntohl(addr.s_addr); | |
718e3744 | 781 | |
d62a17ae | 782 | if (IPV4_NET127(destination)) |
783 | return 0; | |
718e3744 | 784 | |
d62a17ae | 785 | /* Net 0 may match to the default route. */ |
786 | if (IPV4_NET0(destination) && destination != 0) | |
787 | return 0; | |
718e3744 | 788 | |
d62a17ae | 789 | /* Unicast address must belong to class A, B, C. */ |
790 | if (IN_CLASSA(destination)) | |
791 | return 1; | |
792 | if (IN_CLASSB(destination)) | |
793 | return 1; | |
794 | if (IN_CLASSC(destination)) | |
795 | return 1; | |
718e3744 | 796 | |
d62a17ae | 797 | return 0; |
718e3744 | 798 | } |
799 | ||
800 | /* RIP version 2 authentication. */ | |
d62a17ae | 801 | static int rip_auth_simple_password(struct rte *rte, struct sockaddr_in *from, |
802 | struct interface *ifp) | |
803 | { | |
804 | struct rip_interface *ri; | |
0961ea93 | 805 | char *auth_str = (char *)rte + offsetof(struct rte, prefix); |
d62a17ae | 806 | int i; |
807 | ||
808 | /* reject passwords with zeros in the middle of the string */ | |
0961ea93 | 809 | for (i = strnlen(auth_str, 16); i < 16; i++) { |
d62a17ae | 810 | if (auth_str[i] != '\0') |
811 | return 0; | |
812 | } | |
813 | ||
814 | if (IS_RIP_DEBUG_EVENT) | |
815 | zlog_debug("RIPv2 simple password authentication from %s", | |
816 | inet_ntoa(from->sin_addr)); | |
817 | ||
818 | ri = ifp->info; | |
819 | ||
820 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
821 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) | |
822 | return 0; | |
718e3744 | 823 | |
d62a17ae | 824 | /* Simple password authentication. */ |
825 | if (ri->auth_str) { | |
826 | if (strncmp(auth_str, ri->auth_str, 16) == 0) | |
827 | return 1; | |
828 | } | |
829 | if (ri->key_chain) { | |
830 | struct keychain *keychain; | |
831 | struct key *key; | |
832 | ||
833 | keychain = keychain_lookup(ri->key_chain); | |
c4efb224 | 834 | if (keychain == NULL || keychain->key == NULL) |
d62a17ae | 835 | return 0; |
836 | ||
837 | key = key_match_for_accept(keychain, auth_str); | |
838 | if (key) | |
839 | return 1; | |
840 | } | |
841 | return 0; | |
718e3744 | 842 | } |
843 | ||
844 | /* RIP version 2 authentication with MD5. */ | |
d62a17ae | 845 | static int rip_auth_md5(struct rip_packet *packet, struct sockaddr_in *from, |
846 | int length, struct interface *ifp) | |
847 | { | |
848 | struct rip_interface *ri; | |
849 | struct rip_md5_info *md5; | |
850 | struct rip_md5_data *md5data; | |
851 | struct keychain *keychain; | |
852 | struct key *key; | |
853 | MD5_CTX ctx; | |
d7c0a89a QY |
854 | uint8_t digest[RIP_AUTH_MD5_SIZE]; |
855 | uint16_t packet_len; | |
d62a17ae | 856 | char auth_str[RIP_AUTH_MD5_SIZE]; |
857 | ||
858 | if (IS_RIP_DEBUG_EVENT) | |
859 | zlog_debug("RIPv2 MD5 authentication from %s", | |
860 | inet_ntoa(from->sin_addr)); | |
718e3744 | 861 | |
d62a17ae | 862 | ri = ifp->info; |
863 | md5 = (struct rip_md5_info *)&packet->rte; | |
864 | ||
865 | /* Check auth type. */ | |
866 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) | |
867 | return 0; | |
868 | ||
869 | /* If the authentication length is less than 16, then it must be wrong | |
870 | * for | |
871 | * any interpretation of rfc2082. Some implementations also interpret | |
872 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka | |
873 | * RIP_AUTH_MD5_COMPAT_SIZE. | |
874 | */ | |
875 | if (!((md5->auth_len == RIP_AUTH_MD5_SIZE) | |
876 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) { | |
877 | if (IS_RIP_DEBUG_EVENT) | |
878 | zlog_debug( | |
879 | "RIPv2 MD5 authentication, strange authentication " | |
880 | "length field %d", | |
881 | md5->auth_len); | |
882 | return 0; | |
883 | } | |
884 | ||
885 | /* grab and verify check packet length */ | |
886 | packet_len = ntohs(md5->packet_len); | |
718e3744 | 887 | |
d62a17ae | 888 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) { |
889 | if (IS_RIP_DEBUG_EVENT) | |
890 | zlog_debug( | |
891 | "RIPv2 MD5 authentication, packet length field %d " | |
892 | "greater than received length %d!", | |
893 | md5->packet_len, length); | |
894 | return 0; | |
895 | } | |
896 | ||
897 | /* retrieve authentication data */ | |
d7c0a89a | 898 | md5data = (struct rip_md5_data *)(((uint8_t *)packet) + packet_len); |
d62a17ae | 899 | |
900 | memset(auth_str, 0, RIP_AUTH_MD5_SIZE); | |
901 | ||
902 | if (ri->key_chain) { | |
903 | keychain = keychain_lookup(ri->key_chain); | |
904 | if (keychain == NULL) | |
905 | return 0; | |
906 | ||
907 | key = key_lookup_for_accept(keychain, md5->keyid); | |
e65e227f | 908 | if (key == NULL || key->string == NULL) |
d62a17ae | 909 | return 0; |
910 | ||
911 | strncpy(auth_str, key->string, RIP_AUTH_MD5_SIZE); | |
912 | } else if (ri->auth_str) | |
913 | strncpy(auth_str, ri->auth_str, RIP_AUTH_MD5_SIZE); | |
914 | ||
915 | if (auth_str[0] == 0) | |
916 | return 0; | |
917 | ||
918 | /* MD5 digest authentication. */ | |
919 | memset(&ctx, 0, sizeof(ctx)); | |
920 | MD5Init(&ctx); | |
921 | MD5Update(&ctx, packet, packet_len + RIP_HEADER_SIZE); | |
922 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
923 | MD5Final(digest, &ctx); | |
924 | ||
925 | if (memcmp(md5data->digest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
926 | return packet_len; | |
927 | else | |
928 | return 0; | |
718e3744 | 929 | } |
930 | ||
b14ee00b | 931 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
932 | * (left justified and padded). | |
933 | * | |
934 | * presumes one of ri or key is valid, and that the auth strings they point | |
935 | * to are nul terminated. If neither are present, auth_str will be fully | |
936 | * zero padded. | |
937 | * | |
938 | */ | |
d62a17ae | 939 | static void rip_auth_prepare_str_send(struct rip_interface *ri, struct key *key, |
940 | char *auth_str, int len) | |
718e3744 | 941 | { |
d62a17ae | 942 | assert(ri || key); |
718e3744 | 943 | |
d62a17ae | 944 | memset(auth_str, 0, len); |
945 | if (key && key->string) | |
946 | strncpy(auth_str, key->string, len); | |
947 | else if (ri->auth_str) | |
948 | strncpy(auth_str, ri->auth_str, len); | |
718e3744 | 949 | |
d62a17ae | 950 | return; |
b14ee00b | 951 | } |
718e3744 | 952 | |
b14ee00b | 953 | /* Write RIPv2 simple password authentication information |
954 | * | |
d62a17ae | 955 | * auth_str is presumed to be 2 bytes and correctly prepared |
b14ee00b | 956 | * (left justified and zero padded). |
957 | */ | |
d62a17ae | 958 | static void rip_auth_simple_write(struct stream *s, char *auth_str, int len) |
b14ee00b | 959 | { |
d62a17ae | 960 | assert(s && len == RIP_AUTH_SIMPLE_SIZE); |
961 | ||
962 | stream_putw(s, RIP_FAMILY_AUTH); | |
963 | stream_putw(s, RIP_AUTH_SIMPLE_PASSWORD); | |
964 | stream_put(s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
965 | ||
966 | return; | |
b14ee00b | 967 | } |
718e3744 | 968 | |
d62a17ae | 969 | /* write RIPv2 MD5 "authentication header" |
b14ee00b | 970 | * (uses the auth key data field) |
971 | * | |
972 | * Digest offset field is set to 0. | |
973 | * | |
974 | * returns: offset of the digest offset field, which must be set when | |
975 | * length to the auth-data MD5 digest is known. | |
976 | */ | |
d62a17ae | 977 | static size_t rip_auth_md5_ah_write(struct stream *s, struct rip_interface *ri, |
978 | struct key *key) | |
979 | { | |
980 | size_t doff = 0; | |
981 | ||
982 | assert(s && ri && ri->auth_type == RIP_AUTH_MD5); | |
983 | ||
984 | /* MD5 authentication. */ | |
985 | stream_putw(s, RIP_FAMILY_AUTH); | |
986 | stream_putw(s, RIP_AUTH_MD5); | |
987 | ||
988 | /* MD5 AH digest offset field. | |
989 | * | |
990 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
991 | * is known. Actual value is set in .....(). | |
992 | */ | |
993 | doff = stream_get_endp(s); | |
994 | stream_putw(s, 0); | |
995 | ||
996 | /* Key ID. */ | |
997 | if (key) | |
998 | stream_putc(s, key->index % 256); | |
999 | else | |
1000 | stream_putc(s, 1); | |
1001 | ||
1002 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds | |
1003 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for | |
1004 | * this | |
1005 | * to be configurable. | |
1006 | */ | |
1007 | stream_putc(s, ri->md5_auth_len); | |
1008 | ||
1009 | /* Sequence Number (non-decreasing). */ | |
1010 | /* RFC2080: The value used in the sequence number is | |
1011 | arbitrary, but two suggestions are the time of the | |
1012 | message's creation or a simple message counter. */ | |
1013 | stream_putl(s, time(NULL)); | |
1014 | ||
1015 | /* Reserved field must be zero. */ | |
1016 | stream_putl(s, 0); | |
1017 | stream_putl(s, 0); | |
1018 | ||
1019 | return doff; | |
b14ee00b | 1020 | } |
1021 | ||
1022 | /* If authentication is in used, write the appropriate header | |
1023 | * returns stream offset to which length must later be written | |
1024 | * or 0 if this is not required | |
1025 | */ | |
d62a17ae | 1026 | static size_t rip_auth_header_write(struct stream *s, struct rip_interface *ri, |
1027 | struct key *key, char *auth_str, int len) | |
1028 | { | |
1029 | assert(ri->auth_type != RIP_NO_AUTH); | |
1030 | ||
1031 | switch (ri->auth_type) { | |
1032 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1033 | rip_auth_prepare_str_send(ri, key, auth_str, len); | |
1034 | rip_auth_simple_write(s, auth_str, len); | |
1035 | return 0; | |
1036 | case RIP_AUTH_MD5: | |
1037 | return rip_auth_md5_ah_write(s, ri, key); | |
1038 | } | |
1039 | assert(1); | |
1040 | return 0; | |
b14ee00b | 1041 | } |
1042 | ||
1043 | /* Write RIPv2 MD5 authentication data trailer */ | |
d62a17ae | 1044 | static void rip_auth_md5_set(struct stream *s, struct rip_interface *ri, |
1045 | size_t doff, char *auth_str, int authlen) | |
1046 | { | |
1047 | unsigned long len; | |
1048 | MD5_CTX ctx; | |
1049 | unsigned char digest[RIP_AUTH_MD5_SIZE]; | |
1050 | ||
1051 | /* Make it sure this interface is configured as MD5 | |
1052 | authentication. */ | |
1053 | assert((ri->auth_type == RIP_AUTH_MD5) | |
1054 | && (authlen == RIP_AUTH_MD5_SIZE)); | |
1055 | assert(doff > 0); | |
1056 | ||
1057 | /* Get packet length. */ | |
1058 | len = stream_get_endp(s); | |
1059 | ||
1060 | /* Check packet length. */ | |
1061 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) { | |
1c50c1c0 QY |
1062 | flog_err( |
1063 | EC_RIP_PACKET, | |
1064 | "rip_auth_md5_set(): packet length %ld is less than minimum length.", | |
1065 | len); | |
d62a17ae | 1066 | return; |
1067 | } | |
1068 | ||
1069 | /* Set the digest offset length in the header */ | |
1070 | stream_putw_at(s, doff, len); | |
1071 | ||
1072 | /* Set authentication data. */ | |
1073 | stream_putw(s, RIP_FAMILY_AUTH); | |
1074 | stream_putw(s, RIP_AUTH_DATA); | |
1075 | ||
1076 | /* Generate a digest for the RIP packet. */ | |
1077 | memset(&ctx, 0, sizeof(ctx)); | |
1078 | MD5Init(&ctx); | |
1079 | MD5Update(&ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1080 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1081 | MD5Final(digest, &ctx); | |
1082 | ||
1083 | /* Copy the digest to the packet. */ | |
1084 | stream_write(s, digest, RIP_AUTH_MD5_SIZE); | |
718e3744 | 1085 | } |
1086 | ||
1087 | /* RIP routing information. */ | |
d62a17ae | 1088 | static void rip_response_process(struct rip_packet *packet, int size, |
1089 | struct sockaddr_in *from, | |
1090 | struct connected *ifc) | |
1091 | { | |
045c5389 RW |
1092 | struct rip_interface *ri = ifc->ifp->info; |
1093 | struct rip *rip = ri->rip; | |
d62a17ae | 1094 | caddr_t lim; |
1095 | struct rte *rte; | |
1096 | struct prefix_ipv4 ifaddr; | |
1097 | struct prefix_ipv4 ifaddrclass; | |
1098 | int subnetted; | |
1099 | ||
1100 | memset(&ifaddr, 0, sizeof(ifaddr)); | |
1101 | /* We don't know yet. */ | |
1102 | subnetted = -1; | |
1103 | ||
1104 | /* The Response must be ignored if it is not from the RIP | |
1105 | port. (RFC2453 - Sec. 3.9.2)*/ | |
1106 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) { | |
1107 | zlog_info("response doesn't come from RIP port: %d", | |
1108 | from->sin_port); | |
045c5389 | 1109 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1110 | return; |
718e3744 | 1111 | } |
1112 | ||
d62a17ae | 1113 | /* The datagram's IPv4 source address should be checked to see |
1114 | whether the datagram is from a valid neighbor; the source of the | |
1115 | datagram must be on a directly connected network (RFC2453 - Sec. | |
1116 | 3.9.2) */ | |
045c5389 | 1117 | if (if_lookup_address((void *)&from->sin_addr, AF_INET, rip->vrf_id) |
d62a17ae | 1118 | == NULL) { |
1119 | zlog_info( | |
1120 | "This datagram doesn't came from a valid neighbor: %s", | |
1121 | inet_ntoa(from->sin_addr)); | |
045c5389 | 1122 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1123 | return; |
718e3744 | 1124 | } |
1125 | ||
d62a17ae | 1126 | /* It is also worth checking to see whether the response is from one |
1127 | of the router's own addresses. */ | |
1128 | ||
1129 | ; /* Alredy done in rip_read () */ | |
1130 | ||
1131 | /* Update RIP peer. */ | |
045c5389 | 1132 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1133 | |
1134 | /* Set RTE pointer. */ | |
1135 | rte = packet->rte; | |
1136 | ||
1137 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
1138 | /* RIPv2 authentication check. */ | |
1139 | /* If the Address Family Identifier of the first (and only the | |
1140 | first) entry in the message is 0xFFFF, then the remainder of | |
1141 | the entry contains the authentication. */ | |
1142 | /* If the packet gets here it means authentication enabled */ | |
1143 | /* Check is done in rip_read(). So, just skipping it */ | |
1144 | if (packet->version == RIPv2 && rte == packet->rte | |
1145 | && rte->family == htons(RIP_FAMILY_AUTH)) | |
1146 | continue; | |
1147 | ||
1148 | if (rte->family != htons(AF_INET)) { | |
1149 | /* Address family check. RIP only supports AF_INET. */ | |
1150 | zlog_info("Unsupported family %d from %s.", | |
1151 | ntohs(rte->family), | |
1152 | inet_ntoa(from->sin_addr)); | |
1153 | continue; | |
718e3744 | 1154 | } |
d62a17ae | 1155 | |
1156 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1157 | or 127) */ | |
1158 | if (!rip_destination_check(rte->prefix)) { | |
1159 | zlog_info( | |
1160 | "Network is net 0 or net 127 or it is not unicast network"); | |
045c5389 | 1161 | rip_peer_bad_route(rip, from); |
d62a17ae | 1162 | continue; |
718e3744 | 1163 | } |
1164 | ||
d62a17ae | 1165 | /* Convert metric value to host byte order. */ |
1166 | rte->metric = ntohl(rte->metric); | |
718e3744 | 1167 | |
d62a17ae | 1168 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1169 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
1170 | zlog_info("Route's metric is not in the 1-16 range."); | |
045c5389 | 1171 | rip_peer_bad_route(rip, from); |
d62a17ae | 1172 | continue; |
1173 | } | |
718e3744 | 1174 | |
d62a17ae | 1175 | /* RIPv1 does not have nexthop value. */ |
1176 | if (packet->version == RIPv1 && rte->nexthop.s_addr != 0) { | |
1177 | zlog_info("RIPv1 packet with nexthop value %s", | |
1178 | inet_ntoa(rte->nexthop)); | |
045c5389 | 1179 | rip_peer_bad_route(rip, from); |
d62a17ae | 1180 | continue; |
1181 | } | |
718e3744 | 1182 | |
d62a17ae | 1183 | /* That is, if the provided information is ignored, a possibly |
1184 | sub-optimal, but absolutely valid, route may be taken. If | |
1185 | the received Next Hop is not directly reachable, it should be | |
1186 | treated as 0.0.0.0. */ | |
1187 | if (packet->version == RIPv2 && rte->nexthop.s_addr != 0) { | |
d7c0a89a | 1188 | uint32_t addrval; |
d62a17ae | 1189 | |
1190 | /* Multicast address check. */ | |
1191 | addrval = ntohl(rte->nexthop.s_addr); | |
1192 | if (IN_CLASSD(addrval)) { | |
1193 | zlog_info( | |
1194 | "Nexthop %s is multicast address, skip this rte", | |
1195 | inet_ntoa(rte->nexthop)); | |
1196 | continue; | |
1197 | } | |
1198 | ||
1199 | if (!if_lookup_address((void *)&rte->nexthop, AF_INET, | |
045c5389 | 1200 | rip->vrf_id)) { |
d62a17ae | 1201 | struct route_node *rn; |
1202 | struct rip_info *rinfo; | |
1203 | ||
1204 | rn = route_node_match_ipv4(rip->table, | |
1205 | &rte->nexthop); | |
1206 | ||
1207 | if (rn) { | |
1208 | rinfo = rn->info; | |
1209 | ||
1210 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1211 | && rinfo->sub_type | |
1212 | == RIP_ROUTE_RTE) { | |
1213 | if (IS_RIP_DEBUG_EVENT) | |
1214 | zlog_debug( | |
1215 | "Next hop %s is on RIP network. Set nexthop to the packet's originator", | |
1216 | inet_ntoa( | |
1217 | rte->nexthop)); | |
1218 | rte->nexthop = rinfo->from; | |
1219 | } else { | |
1220 | if (IS_RIP_DEBUG_EVENT) | |
1221 | zlog_debug( | |
1222 | "Next hop %s is not directly reachable. Treat it as 0.0.0.0", | |
1223 | inet_ntoa( | |
1224 | rte->nexthop)); | |
1225 | rte->nexthop.s_addr = 0; | |
1226 | } | |
1227 | ||
1228 | route_unlock_node(rn); | |
1229 | } else { | |
1230 | if (IS_RIP_DEBUG_EVENT) | |
1231 | zlog_debug( | |
1232 | "Next hop %s is not directly reachable. Treat it as 0.0.0.0", | |
1233 | inet_ntoa( | |
1234 | rte->nexthop)); | |
1235 | rte->nexthop.s_addr = 0; | |
1236 | } | |
1237 | } | |
1238 | } | |
718e3744 | 1239 | |
d62a17ae | 1240 | /* For RIPv1, there won't be a valid netmask. |
1241 | ||
1242 | This is a best guess at the masks. If everyone was using old | |
1243 | Ciscos before the 'ip subnet zero' option, it would be almost | |
1244 | right too :-) | |
1245 | ||
0437e105 | 1246 | Cisco summarize ripv1 advertisements to the classful boundary |
d62a17ae | 1247 | (/16 for class B's) except when the RIP packet does to inside |
1248 | the classful network in question. */ | |
1249 | ||
1250 | if ((packet->version == RIPv1 && rte->prefix.s_addr != 0) | |
1251 | || (packet->version == RIPv2 | |
1252 | && (rte->prefix.s_addr != 0 | |
1253 | && rte->mask.s_addr == 0))) { | |
d7c0a89a | 1254 | uint32_t destination; |
d62a17ae | 1255 | |
1256 | if (subnetted == -1) { | |
1257 | memcpy(&ifaddr, ifc->address, | |
1258 | sizeof(struct prefix_ipv4)); | |
1259 | memcpy(&ifaddrclass, &ifaddr, | |
1260 | sizeof(struct prefix_ipv4)); | |
1261 | apply_classful_mask_ipv4(&ifaddrclass); | |
1262 | subnetted = 0; | |
1263 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1264 | subnetted = 1; | |
1265 | } | |
1266 | ||
1267 | destination = ntohl(rte->prefix.s_addr); | |
1268 | ||
1269 | if (IN_CLASSA(destination)) | |
1270 | masklen2ip(8, &rte->mask); | |
1271 | else if (IN_CLASSB(destination)) | |
1272 | masklen2ip(16, &rte->mask); | |
1273 | else if (IN_CLASSC(destination)) | |
1274 | masklen2ip(24, &rte->mask); | |
1275 | ||
1276 | if (subnetted == 1) | |
1277 | masklen2ip(ifaddrclass.prefixlen, | |
1278 | (struct in_addr *)&destination); | |
1279 | if ((subnetted == 1) | |
1280 | && ((rte->prefix.s_addr & destination) | |
1281 | == ifaddrclass.prefix.s_addr)) { | |
1282 | masklen2ip(ifaddr.prefixlen, &rte->mask); | |
1283 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1284 | != rte->prefix.s_addr) | |
1285 | masklen2ip(32, &rte->mask); | |
1286 | if (IS_RIP_DEBUG_EVENT) | |
1287 | zlog_debug("Subnetted route %s", | |
1288 | inet_ntoa(rte->prefix)); | |
1289 | } else { | |
1290 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1291 | != rte->prefix.s_addr) | |
1292 | continue; | |
1293 | } | |
1294 | ||
1295 | if (IS_RIP_DEBUG_EVENT) { | |
1296 | zlog_debug("Resultant route %s", | |
1297 | inet_ntoa(rte->prefix)); | |
1298 | zlog_debug("Resultant mask %s", | |
1299 | inet_ntoa(rte->mask)); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1304 | ignore the entry. */ | |
1305 | if ((packet->version == RIPv2) && (rte->mask.s_addr != 0) | |
1306 | && ((rte->prefix.s_addr & rte->mask.s_addr) | |
1307 | != rte->prefix.s_addr)) { | |
1308 | zlog_warn( | |
1309 | "RIPv2 address %s is not mask /%d applied one", | |
1310 | inet_ntoa(rte->prefix), ip_masklen(rte->mask)); | |
045c5389 | 1311 | rip_peer_bad_route(rip, from); |
d62a17ae | 1312 | continue; |
1313 | } | |
1314 | ||
1315 | /* Default route's netmask is ignored. */ | |
1316 | if (packet->version == RIPv2 && (rte->prefix.s_addr == 0) | |
1317 | && (rte->mask.s_addr != 0)) { | |
1318 | if (IS_RIP_DEBUG_EVENT) | |
1319 | zlog_debug( | |
1320 | "Default route with non-zero netmask. Set zero to netmask"); | |
1321 | rte->mask.s_addr = 0; | |
1322 | } | |
1323 | ||
1324 | /* Routing table updates. */ | |
1325 | rip_rte_process(rte, from, ifc->ifp); | |
718e3744 | 1326 | } |
718e3744 | 1327 | } |
1328 | ||
a4e987e0 | 1329 | /* Make socket for RIP protocol. */ |
8c9226c2 | 1330 | int rip_create_socket(void) |
d62a17ae | 1331 | { |
1332 | int ret; | |
1333 | int sock; | |
1334 | struct sockaddr_in addr; | |
1335 | ||
1336 | memset(&addr, 0, sizeof(struct sockaddr_in)); | |
1337 | addr.sin_family = AF_INET; | |
1338 | addr.sin_addr.s_addr = INADDR_ANY; | |
6f0e3f6e | 1339 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1340 | addr.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1341 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
d62a17ae | 1342 | /* sending port must always be the RIP port */ |
1343 | addr.sin_port = htons(RIP_PORT_DEFAULT); | |
1344 | ||
1345 | /* Make datagram socket. */ | |
1346 | sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
1347 | if (sock < 0) { | |
450971aa | 1348 | flog_err_sys(EC_LIB_SOCKET, "Cannot create UDP socket: %s", |
09c866e3 | 1349 | safe_strerror(errno)); |
d62a17ae | 1350 | exit(1); |
1351 | } | |
1352 | ||
1353 | sockopt_broadcast(sock); | |
1354 | sockopt_reuseaddr(sock); | |
1355 | sockopt_reuseport(sock); | |
1356 | setsockopt_ipv4_multicast_loop(sock, 0); | |
78b31d5c | 1357 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 1358 | setsockopt_ipv4_tos(sock, IPTOS_PREC_INTERNETCONTROL); |
78b31d5c | 1359 | #endif |
a4e987e0 | 1360 | |
01b9e3fd DL |
1361 | frr_elevate_privs(&ripd_privs) { |
1362 | setsockopt_so_recvbuf(sock, RIP_UDP_RCV_BUF); | |
633fc9b1 DL |
1363 | if ((ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr))) |
1364 | < 0) { | |
01b9e3fd | 1365 | zlog_err("%s: Can't bind socket %d to %s port %d: %s", |
633fc9b1 DL |
1366 | __func__, sock, inet_ntoa(addr.sin_addr), |
1367 | (int)ntohs(addr.sin_port), | |
1368 | safe_strerror(errno)); | |
d62a17ae | 1369 | |
01b9e3fd DL |
1370 | close(sock); |
1371 | return ret; | |
1372 | } | |
01b9e3fd | 1373 | } |
d62a17ae | 1374 | |
1375 | return sock; | |
a4e987e0 | 1376 | } |
1377 | ||
c49ad8f1 | 1378 | /* RIP packet send to destination address, on interface denoted by |
1379 | * by connected argument. NULL to argument denotes destination should be | |
1380 | * should be RIP multicast group | |
1381 | */ | |
d7c0a89a | 1382 | static int rip_send_packet(uint8_t *buf, int size, struct sockaddr_in *to, |
d62a17ae | 1383 | struct connected *ifc) |
1384 | { | |
045c5389 RW |
1385 | struct rip_interface *ri; |
1386 | struct rip *rip; | |
d62a17ae | 1387 | int ret; |
1388 | struct sockaddr_in sin; | |
e35356af RW |
1389 | struct msghdr msg; |
1390 | struct iovec iov; | |
1391 | #ifdef GNU_LINUX | |
1392 | struct cmsghdr *cmsgptr; | |
1393 | char adata[256] = {}; | |
1394 | struct in_pktinfo *pkt; | |
1395 | #endif /* GNU_LINUX */ | |
d62a17ae | 1396 | |
1397 | assert(ifc != NULL); | |
045c5389 RW |
1398 | ri = ifc->ifp->info; |
1399 | rip = ri->rip; | |
d62a17ae | 1400 | |
1401 | if (IS_RIP_DEBUG_PACKET) { | |
f69bd9da | 1402 | #define ADDRESS_SIZE 20 |
d62a17ae | 1403 | char dst[ADDRESS_SIZE]; |
1404 | dst[ADDRESS_SIZE - 1] = '\0'; | |
1405 | ||
1406 | if (to) { | |
1407 | strncpy(dst, inet_ntoa(to->sin_addr), ADDRESS_SIZE - 1); | |
1408 | } else { | |
1409 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
1410 | strncpy(dst, inet_ntoa(sin.sin_addr), ADDRESS_SIZE - 1); | |
1411 | } | |
f69bd9da | 1412 | #undef ADDRESS_SIZE |
d62a17ae | 1413 | zlog_debug("rip_send_packet %s > %s (%s)", |
1414 | inet_ntoa(ifc->address->u.prefix4), dst, | |
1415 | ifc->ifp->name); | |
1416 | } | |
1417 | ||
1418 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) { | |
1419 | /* | |
1420 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is | |
1421 | * configured | |
1422 | * with multiple addresses on the same subnet: the first address | |
1423 | * on the subnet is configured "primary", and all subsequent | |
1424 | * addresses | |
1425 | * on that subnet are treated as "secondary" addresses. | |
1426 | * In order to avoid routing-table bloat on other rip listeners, | |
1427 | * we do not send out RIP packets with ZEBRA_IFA_SECONDARY | |
1428 | * source addrs. | |
1429 | * XXX Since Linux is the only system for which the | |
1430 | * ZEBRA_IFA_SECONDARY | |
1431 | * flag is set, we would end up sending a packet for a | |
1432 | * "secondary" | |
1433 | * source address on non-linux systems. | |
1434 | */ | |
1435 | if (IS_RIP_DEBUG_PACKET) | |
1436 | zlog_debug("duplicate dropped"); | |
1437 | return 0; | |
1438 | } | |
1439 | ||
1440 | /* Make destination address. */ | |
1441 | memset(&sin, 0, sizeof(struct sockaddr_in)); | |
1442 | sin.sin_family = AF_INET; | |
6f0e3f6e | 1443 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1444 | sin.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1445 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 1446 | |
d62a17ae | 1447 | /* When destination is specified, use it's port and address. */ |
1448 | if (to) { | |
1449 | sin.sin_port = to->sin_port; | |
1450 | sin.sin_addr = to->sin_addr; | |
1451 | } else { | |
1452 | sin.sin_port = htons(RIP_PORT_DEFAULT); | |
1453 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
ae735d2d | 1454 | |
d62a17ae | 1455 | rip_interface_multicast_set(rip->sock, ifc); |
1456 | } | |
718e3744 | 1457 | |
e35356af RW |
1458 | memset(&msg, 0, sizeof(msg)); |
1459 | msg.msg_name = (void *)&sin; | |
1460 | msg.msg_namelen = sizeof(struct sockaddr_in); | |
1461 | msg.msg_iov = &iov; | |
1462 | msg.msg_iovlen = 1; | |
1463 | iov.iov_base = buf; | |
1464 | iov.iov_len = size; | |
1465 | ||
1466 | #ifdef GNU_LINUX | |
1467 | msg.msg_control = (void *)adata; | |
1468 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in_pktinfo)); | |
1469 | ||
1470 | cmsgptr = (struct cmsghdr *)adata; | |
1471 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); | |
1472 | cmsgptr->cmsg_level = IPPROTO_IP; | |
1473 | cmsgptr->cmsg_type = IP_PKTINFO; | |
1474 | pkt = (struct in_pktinfo *)CMSG_DATA(cmsgptr); | |
1475 | pkt->ipi_ifindex = ifc->ifp->ifindex; | |
1476 | #endif /* GNU_LINUX */ | |
1477 | ||
1478 | ret = sendmsg(rip->sock, &msg, 0); | |
718e3744 | 1479 | |
d62a17ae | 1480 | if (IS_RIP_DEBUG_EVENT) |
1481 | zlog_debug("SEND to %s.%d", inet_ntoa(sin.sin_addr), | |
1482 | ntohs(sin.sin_port)); | |
718e3744 | 1483 | |
d62a17ae | 1484 | if (ret < 0) |
1485 | zlog_warn("can't send packet : %s", safe_strerror(errno)); | |
718e3744 | 1486 | |
d62a17ae | 1487 | return ret; |
718e3744 | 1488 | } |
1489 | ||
1490 | /* Add redistributed route to RIP table. */ | |
045c5389 RW |
1491 | void rip_redistribute_add(struct rip *rip, int type, int sub_type, |
1492 | struct prefix_ipv4 *p, struct nexthop *nh, | |
1493 | unsigned int metric, unsigned char distance, | |
1494 | route_tag_t tag) | |
d62a17ae | 1495 | { |
1496 | int ret; | |
1497 | struct route_node *rp = NULL; | |
1498 | struct rip_info *rinfo = NULL, newinfo; | |
1499 | struct list *list = NULL; | |
1500 | ||
1501 | /* Redistribute route */ | |
1502 | ret = rip_destination_check(p->prefix); | |
1503 | if (!ret) | |
1504 | return; | |
1505 | ||
1506 | rp = route_node_get(rip->table, (struct prefix *)p); | |
1507 | ||
1508 | memset(&newinfo, 0, sizeof(struct rip_info)); | |
1509 | newinfo.type = type; | |
1510 | newinfo.sub_type = sub_type; | |
d62a17ae | 1511 | newinfo.metric = 1; |
1512 | newinfo.external_metric = metric; | |
1513 | newinfo.distance = distance; | |
1514 | if (tag <= UINT16_MAX) /* RIP only supports 16 bit tags */ | |
1515 | newinfo.tag = tag; | |
1516 | newinfo.rp = rp; | |
3f5682c8 | 1517 | newinfo.nh = *nh; |
d62a17ae | 1518 | |
1519 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
1520 | rinfo = listgetdata(listhead(list)); | |
1521 | ||
1522 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
1523 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1524 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
1525 | route_unlock_node(rp); | |
1526 | return; | |
1527 | } | |
718e3744 | 1528 | |
d62a17ae | 1529 | /* Manually configured RIP route check. */ |
1530 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1531 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
1532 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT))) { | |
1533 | if (type != ZEBRA_ROUTE_RIP | |
1534 | || ((sub_type != RIP_ROUTE_STATIC) | |
1535 | && (sub_type != RIP_ROUTE_DEFAULT))) { | |
1536 | route_unlock_node(rp); | |
1537 | return; | |
1538 | } | |
1539 | } | |
1540 | ||
045c5389 | 1541 | (void)rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 1542 | route_unlock_node(rp); |
1543 | } else | |
045c5389 | 1544 | (void)rip_ecmp_add(rip, &newinfo); |
d62a17ae | 1545 | |
1546 | if (IS_RIP_DEBUG_EVENT) { | |
996c9314 LB |
1547 | zlog_debug("Redistribute new prefix %s/%d", |
1548 | inet_ntoa(p->prefix), p->prefixlen); | |
718e3744 | 1549 | } |
1550 | ||
045c5389 | 1551 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 1552 | } |
1553 | ||
1554 | /* Delete redistributed route from RIP table. */ | |
045c5389 RW |
1555 | void rip_redistribute_delete(struct rip *rip, int type, int sub_type, |
1556 | struct prefix_ipv4 *p, ifindex_t ifindex) | |
d62a17ae | 1557 | { |
1558 | int ret; | |
1559 | struct route_node *rp; | |
1560 | struct rip_info *rinfo; | |
1561 | ||
1562 | ret = rip_destination_check(p->prefix); | |
1563 | if (!ret) | |
1564 | return; | |
1565 | ||
1566 | rp = route_node_lookup(rip->table, (struct prefix *)p); | |
1567 | if (rp) { | |
1568 | struct list *list = rp->info; | |
1569 | ||
1570 | if (list != NULL && listcount(list) != 0) { | |
1571 | rinfo = listgetdata(listhead(list)); | |
1572 | if (rinfo != NULL && rinfo->type == type | |
1573 | && rinfo->sub_type == sub_type | |
dd127197 | 1574 | && rinfo->nh.ifindex == ifindex) { |
d62a17ae | 1575 | /* Perform poisoned reverse. */ |
1576 | rinfo->metric = RIP_METRIC_INFINITY; | |
1577 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
1578 | rip_garbage_collect, | |
1579 | rip->garbage_time); | |
1580 | RIP_TIMER_OFF(rinfo->t_timeout); | |
1581 | rinfo->flags |= RIP_RTF_CHANGED; | |
1582 | ||
1583 | if (IS_RIP_DEBUG_EVENT) | |
1584 | zlog_debug( | |
14aa0c3d | 1585 | "Poison %s/%d on the interface %s with an " |
d62a17ae | 1586 | "infinity metric [delete]", |
1587 | inet_ntoa(p->prefix), | |
1588 | p->prefixlen, | |
1589 | ifindex2ifname(ifindex, | |
045c5389 | 1590 | rip->vrf_id)); |
d62a17ae | 1591 | |
045c5389 | 1592 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 1593 | } |
1594 | } | |
1595 | route_unlock_node(rp); | |
1596 | } | |
718e3744 | 1597 | } |
1598 | ||
1599 | /* Response to request called from rip_read ().*/ | |
d62a17ae | 1600 | static void rip_request_process(struct rip_packet *packet, int size, |
1601 | struct sockaddr_in *from, struct connected *ifc) | |
1602 | { | |
045c5389 | 1603 | struct rip *rip; |
d62a17ae | 1604 | caddr_t lim; |
1605 | struct rte *rte; | |
1606 | struct prefix_ipv4 p; | |
1607 | struct route_node *rp; | |
1608 | struct rip_info *rinfo; | |
1609 | struct rip_interface *ri; | |
1610 | ||
1611 | /* Does not reponse to the requests on the loopback interfaces */ | |
1612 | if (if_is_loopback(ifc->ifp)) | |
1613 | return; | |
1614 | ||
1615 | /* Check RIP process is enabled on this interface. */ | |
1616 | ri = ifc->ifp->info; | |
1617 | if (!ri->running) | |
1618 | return; | |
045c5389 | 1619 | rip = ri->rip; |
d62a17ae | 1620 | |
1621 | /* When passive interface is specified, suppress responses */ | |
1622 | if (ri->passive) | |
1623 | return; | |
1624 | ||
1625 | /* RIP peer update. */ | |
045c5389 | 1626 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1627 | |
1628 | lim = ((caddr_t)packet) + size; | |
1629 | rte = packet->rte; | |
1630 | ||
1631 | /* The Request is processed entry by entry. If there are no | |
1632 | entries, no response is given. */ | |
1633 | if (lim == (caddr_t)rte) | |
1634 | return; | |
1635 | ||
1636 | /* There is one special case. If there is exactly one entry in the | |
1637 | request, and it has an address family identifier of zero and a | |
1638 | metric of infinity (i.e., 16), then this is a request to send the | |
1639 | entire routing table. */ | |
1640 | if (lim == ((caddr_t)(rte + 1)) && ntohs(rte->family) == 0 | |
1641 | && ntohl(rte->metric) == RIP_METRIC_INFINITY) { | |
1642 | /* All route with split horizon */ | |
1643 | rip_output_process(ifc, from, rip_all_route, packet->version); | |
1644 | } else { | |
1645 | if (ntohs(rte->family) != AF_INET) | |
1646 | return; | |
1647 | ||
1648 | /* Examine the list of RTEs in the Request one by one. For each | |
1649 | entry, look up the destination in the router's routing | |
1650 | database and, if there is a route, put that route's metric in | |
1651 | the metric field of the RTE. If there is no explicit route | |
1652 | to the specified destination, put infinity in the metric | |
1653 | field. Once all the entries have been filled in, change the | |
1654 | command from Request to Response and send the datagram back | |
1655 | to the requestor. */ | |
1656 | p.family = AF_INET; | |
1657 | ||
1658 | for (; ((caddr_t)rte) < lim; rte++) { | |
1659 | p.prefix = rte->prefix; | |
1660 | p.prefixlen = ip_masklen(rte->mask); | |
1661 | apply_mask_ipv4(&p); | |
1662 | ||
1663 | rp = route_node_lookup(rip->table, (struct prefix *)&p); | |
1664 | if (rp) { | |
1665 | rinfo = listgetdata( | |
1666 | listhead((struct list *)rp->info)); | |
1667 | rte->metric = htonl(rinfo->metric); | |
1668 | route_unlock_node(rp); | |
1669 | } else | |
1670 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
1671 | } | |
1672 | packet->command = RIP_RESPONSE; | |
4e054866 | 1673 | |
b2608623 | 1674 | (void)rip_send_packet((uint8_t *)packet, size, from, ifc); |
d62a17ae | 1675 | } |
c08a2107 | 1676 | rip->counters.queries++; |
718e3744 | 1677 | } |
1678 | ||
718e3744 | 1679 | /* First entry point of RIP packet. */ |
d62a17ae | 1680 | static int rip_read(struct thread *t) |
1681 | { | |
045c5389 | 1682 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 1683 | int sock; |
1684 | int ret; | |
1685 | int rtenum; | |
1686 | union rip_buf rip_buf; | |
1687 | struct rip_packet *packet; | |
1688 | struct sockaddr_in from; | |
1689 | int len; | |
1690 | int vrecv; | |
1691 | socklen_t fromlen; | |
1692 | struct interface *ifp = NULL; | |
1693 | struct connected *ifc; | |
1694 | struct rip_interface *ri; | |
1695 | struct prefix p; | |
1696 | ||
1697 | /* Fetch socket then register myself. */ | |
1698 | sock = THREAD_FD(t); | |
1699 | rip->t_read = NULL; | |
1700 | ||
1701 | /* Add myself to tne next event */ | |
045c5389 | 1702 | rip_event(rip, RIP_READ, sock); |
d62a17ae | 1703 | |
1704 | /* RIPd manages only IPv4. */ | |
1705 | memset(&from, 0, sizeof(struct sockaddr_in)); | |
1706 | fromlen = sizeof(struct sockaddr_in); | |
1707 | ||
1708 | len = recvfrom(sock, (char *)&rip_buf.buf, sizeof(rip_buf.buf), 0, | |
1709 | (struct sockaddr *)&from, &fromlen); | |
1710 | if (len < 0) { | |
1711 | zlog_info("recvfrom failed: %s", safe_strerror(errno)); | |
1712 | return len; | |
1713 | } | |
1714 | ||
1715 | /* Check is this packet comming from myself? */ | |
045c5389 | 1716 | if (if_check_address(rip, from.sin_addr)) { |
d62a17ae | 1717 | if (IS_RIP_DEBUG_PACKET) |
1718 | zlog_debug("ignore packet comes from myself"); | |
1719 | return -1; | |
1720 | } | |
1721 | ||
1722 | /* Which interface is this packet comes from. */ | |
045c5389 | 1723 | ifc = if_lookup_address((void *)&from.sin_addr, AF_INET, rip->vrf_id); |
d62a17ae | 1724 | if (ifc) |
1725 | ifp = ifc->ifp; | |
1726 | ||
1727 | /* RIP packet received */ | |
1728 | if (IS_RIP_DEBUG_EVENT) | |
1729 | zlog_debug("RECV packet from %s port %d on %s", | |
1730 | inet_ntoa(from.sin_addr), ntohs(from.sin_port), | |
1731 | ifp ? ifp->name : "unknown"); | |
1732 | ||
1733 | /* If this packet come from unknown interface, ignore it. */ | |
1734 | if (ifp == NULL) { | |
1735 | zlog_info( | |
1736 | "rip_read: cannot find interface for packet from %s port %d", | |
1737 | inet_ntoa(from.sin_addr), ntohs(from.sin_port)); | |
1738 | return -1; | |
1739 | } | |
1740 | ||
1741 | p.family = AF_INET; | |
1742 | p.u.prefix4 = from.sin_addr; | |
1743 | p.prefixlen = IPV4_MAX_BITLEN; | |
1744 | ||
1745 | ifc = connected_lookup_prefix(ifp, &p); | |
1746 | ||
1747 | if (ifc == NULL) { | |
1748 | zlog_info( | |
1749 | "rip_read: cannot find connected address for packet from %s " | |
1750 | "port %d on interface %s", | |
1751 | inet_ntoa(from.sin_addr), ntohs(from.sin_port), | |
1752 | ifp->name); | |
1753 | return -1; | |
1754 | } | |
1755 | ||
1756 | /* Packet length check. */ | |
1757 | if (len < RIP_PACKET_MINSIZ) { | |
1758 | zlog_warn("packet size %d is smaller than minimum size %d", len, | |
1759 | RIP_PACKET_MINSIZ); | |
045c5389 | 1760 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1761 | return len; |
1762 | } | |
1763 | if (len > RIP_PACKET_MAXSIZ) { | |
1764 | zlog_warn("packet size %d is larger than max size %d", len, | |
1765 | RIP_PACKET_MAXSIZ); | |
045c5389 | 1766 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1767 | return len; |
1768 | } | |
1769 | ||
1770 | /* Packet alignment check. */ | |
1771 | if ((len - RIP_PACKET_MINSIZ) % 20) { | |
1772 | zlog_warn("packet size %d is wrong for RIP packet alignment", | |
1773 | len); | |
045c5389 | 1774 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1775 | return len; |
1776 | } | |
1777 | ||
1778 | /* Set RTE number. */ | |
1779 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1780 | ||
1781 | /* For easy to handle. */ | |
1782 | packet = &rip_buf.rip_packet; | |
1783 | ||
1784 | /* RIP version check. */ | |
1785 | if (packet->version == 0) { | |
1786 | zlog_info("version 0 with command %d received.", | |
1787 | packet->command); | |
045c5389 | 1788 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1789 | return -1; |
1790 | } | |
1791 | ||
1792 | /* Dump RIP packet. */ | |
1793 | if (IS_RIP_DEBUG_RECV) | |
1794 | rip_packet_dump(packet, len, "RECV"); | |
1795 | ||
1796 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1797 | that "Version 1 implementations are to ignore this extra data and | |
1798 | process only the fields specified in this document.". So RIPv3 | |
1799 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1800 | if (packet->version > RIPv2) | |
1801 | packet->version = RIPv2; | |
1802 | ||
1803 | /* Is RIP running or is this RIP neighbor ?*/ | |
1804 | ri = ifp->info; | |
045c5389 | 1805 | if (!ri->running && !rip_neighbor_lookup(rip, &from)) { |
d62a17ae | 1806 | if (IS_RIP_DEBUG_EVENT) |
1807 | zlog_debug("RIP is not enabled on interface %s.", | |
1808 | ifp->name); | |
045c5389 | 1809 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1810 | return -1; |
1811 | } | |
1812 | ||
1813 | /* RIP Version check. RFC2453, 4.6 and 5.1 */ | |
1814 | vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? rip->version_recv | |
1815 | : ri->ri_receive); | |
1816 | if (vrecv == RI_RIP_VERSION_NONE | |
1817 | || ((packet->version == RIPv1) && !(vrecv & RIPv1)) | |
1818 | || ((packet->version == RIPv2) && !(vrecv & RIPv2))) { | |
1819 | if (IS_RIP_DEBUG_PACKET) | |
1820 | zlog_debug( | |
1821 | " packet's v%d doesn't fit to if version spec", | |
1822 | packet->version); | |
045c5389 | 1823 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1824 | return -1; |
1825 | } | |
1826 | ||
1827 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 | |
1828 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
1829 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
1830 | if ((ri->auth_type == RIP_NO_AUTH) && rtenum | |
1831 | && (packet->version == RIPv2) | |
1832 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) { | |
1833 | if (IS_RIP_DEBUG_EVENT) | |
1834 | zlog_debug( | |
1835 | "packet RIPv%d is dropped because authentication disabled", | |
1836 | packet->version); | |
fe339c95 | 1837 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1838 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1839 | return -1; |
1840 | } | |
1841 | ||
1842 | /* RFC: | |
1843 | If the router is configured to authenticate RIP-2 messages, then | |
1844 | RIP-1 messages and RIP-2 messages which pass authentication | |
1845 | testing shall be accepted; unauthenticated and failed | |
1846 | authentication RIP-2 messages shall be discarded. For maximum | |
1847 | security, RIP-1 messages should be ignored when authentication is | |
1848 | in use (see section 4.1); otherwise, the routing information from | |
1849 | authenticated messages will be propagated by RIP-1 routers in an | |
1850 | unauthenticated manner. | |
1851 | */ | |
1852 | /* We make an exception for RIPv1 REQUEST packets, to which we'll | |
1853 | * always reply regardless of authentication settings, because: | |
1854 | * | |
1855 | * - if there other authorised routers on-link, the REQUESTor can | |
1856 | * passively obtain the routing updates anyway | |
1857 | * - if there are no other authorised routers on-link, RIP can | |
1858 | * easily be disabled for the link to prevent giving out information | |
1859 | * on state of this routers RIP routing table.. | |
1860 | * | |
1861 | * I.e. if RIPv1 has any place anymore these days, it's as a very | |
1862 | * simple way to distribute routing information (e.g. to embedded | |
1863 | * hosts / appliances) and the ability to give out RIPv1 | |
1864 | * routing-information freely, while still requiring RIPv2 | |
1865 | * authentication for any RESPONSEs might be vaguely useful. | |
1866 | */ | |
1867 | if (ri->auth_type != RIP_NO_AUTH && packet->version == RIPv1) { | |
1868 | /* Discard RIPv1 messages other than REQUESTs */ | |
1869 | if (packet->command != RIP_REQUEST) { | |
1870 | if (IS_RIP_DEBUG_PACKET) | |
1871 | zlog_debug( | |
1872 | "RIPv1" | |
1873 | " dropped because authentication enabled"); | |
fe339c95 | 1874 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1875 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1876 | return -1; |
1877 | } | |
1878 | } else if (ri->auth_type != RIP_NO_AUTH) { | |
1879 | const char *auth_desc; | |
1880 | ||
1881 | if (rtenum == 0) { | |
1882 | /* There definitely is no authentication in the packet. | |
1883 | */ | |
1884 | if (IS_RIP_DEBUG_PACKET) | |
1885 | zlog_debug( | |
1886 | "RIPv2 authentication failed: no auth RTE in packet"); | |
fe339c95 | 1887 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1888 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1889 | return -1; |
1890 | } | |
1891 | ||
1892 | /* First RTE must be an Authentication Family RTE */ | |
1893 | if (packet->rte->family != htons(RIP_FAMILY_AUTH)) { | |
1894 | if (IS_RIP_DEBUG_PACKET) | |
1895 | zlog_debug( | |
1896 | "RIPv2" | |
1897 | " dropped because authentication enabled"); | |
fe339c95 | 1898 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1899 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1900 | return -1; |
1901 | } | |
1902 | ||
1903 | /* Check RIPv2 authentication. */ | |
1904 | switch (ntohs(packet->rte->tag)) { | |
1905 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1906 | auth_desc = "simple"; | |
1907 | ret = rip_auth_simple_password(packet->rte, &from, ifp); | |
1908 | break; | |
1909 | ||
1910 | case RIP_AUTH_MD5: | |
1911 | auth_desc = "MD5"; | |
1912 | ret = rip_auth_md5(packet, &from, len, ifp); | |
1913 | /* Reset RIP packet length to trim MD5 data. */ | |
1914 | len = ret; | |
1915 | break; | |
1916 | ||
1917 | default: | |
1918 | ret = 0; | |
1919 | auth_desc = "unknown type"; | |
1920 | if (IS_RIP_DEBUG_PACKET) | |
1921 | zlog_debug( | |
1922 | "RIPv2 Unknown authentication type %d", | |
1923 | ntohs(packet->rte->tag)); | |
1924 | } | |
1925 | ||
1926 | if (ret) { | |
1927 | if (IS_RIP_DEBUG_PACKET) | |
1928 | zlog_debug("RIPv2 %s authentication success", | |
1929 | auth_desc); | |
1930 | } else { | |
1931 | if (IS_RIP_DEBUG_PACKET) | |
1932 | zlog_debug("RIPv2 %s authentication failure", | |
1933 | auth_desc); | |
fe339c95 | 1934 | ripd_notif_send_auth_failure(ifp->name); |
045c5389 | 1935 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1936 | return -1; |
1937 | } | |
1938 | } | |
1939 | ||
1940 | /* Process each command. */ | |
1941 | switch (packet->command) { | |
1942 | case RIP_RESPONSE: | |
1943 | rip_response_process(packet, len, &from, ifc); | |
1944 | break; | |
1945 | case RIP_REQUEST: | |
1946 | case RIP_POLL: | |
1947 | rip_request_process(packet, len, &from, ifc); | |
1948 | break; | |
1949 | case RIP_TRACEON: | |
1950 | case RIP_TRACEOFF: | |
1951 | zlog_info( | |
1952 | "Obsolete command %s received, please sent it to routed", | |
1953 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 1954 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1955 | break; |
1956 | case RIP_POLL_ENTRY: | |
1957 | zlog_info("Obsolete command %s received", | |
1958 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 1959 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1960 | break; |
1961 | default: | |
1962 | zlog_info("Unknown RIP command %d received", packet->command); | |
045c5389 | 1963 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1964 | break; |
1965 | } | |
1966 | ||
1967 | return len; | |
718e3744 | 1968 | } |
1969 | ||
718e3744 | 1970 | /* Write routing table entry to the stream and return next index of |
1971 | the routing table entry in the stream. */ | |
d62a17ae | 1972 | static int rip_write_rte(int num, struct stream *s, struct prefix_ipv4 *p, |
d7c0a89a | 1973 | uint8_t version, struct rip_info *rinfo) |
d62a17ae | 1974 | { |
1975 | struct in_addr mask; | |
1976 | ||
1977 | /* Write routing table entry. */ | |
1978 | if (version == RIPv1) { | |
1979 | stream_putw(s, AF_INET); | |
1980 | stream_putw(s, 0); | |
1981 | stream_put_ipv4(s, p->prefix.s_addr); | |
1982 | stream_put_ipv4(s, 0); | |
1983 | stream_put_ipv4(s, 0); | |
1984 | stream_putl(s, rinfo->metric_out); | |
1985 | } else { | |
1986 | masklen2ip(p->prefixlen, &mask); | |
1987 | ||
1988 | stream_putw(s, AF_INET); | |
1989 | stream_putw(s, rinfo->tag_out); | |
1990 | stream_put_ipv4(s, p->prefix.s_addr); | |
1991 | stream_put_ipv4(s, mask.s_addr); | |
1992 | stream_put_ipv4(s, rinfo->nexthop_out.s_addr); | |
1993 | stream_putl(s, rinfo->metric_out); | |
1994 | } | |
1995 | ||
1996 | return ++num; | |
718e3744 | 1997 | } |
1998 | ||
1999 | /* Send update to the ifp or spcified neighbor. */ | |
d62a17ae | 2000 | void rip_output_process(struct connected *ifc, struct sockaddr_in *to, |
d7c0a89a | 2001 | int route_type, uint8_t version) |
d62a17ae | 2002 | { |
045c5389 | 2003 | struct rip *rip; |
d62a17ae | 2004 | int ret; |
2005 | struct stream *s; | |
2006 | struct route_node *rp; | |
2007 | struct rip_info *rinfo; | |
2008 | struct rip_interface *ri; | |
2009 | struct prefix_ipv4 *p; | |
2010 | struct prefix_ipv4 classfull; | |
2011 | struct prefix_ipv4 ifaddrclass; | |
2012 | struct key *key = NULL; | |
2013 | /* this might need to made dynamic if RIP ever supported auth methods | |
2014 | with larger key string sizes */ | |
2015 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
2016 | size_t doff = 0; /* offset of digest offset field */ | |
2017 | int num = 0; | |
2018 | int rtemax; | |
2019 | int subnetted = 0; | |
2020 | struct list *list = NULL; | |
2021 | struct listnode *listnode = NULL; | |
2022 | ||
2023 | /* Logging output event. */ | |
2024 | if (IS_RIP_DEBUG_EVENT) { | |
2025 | if (to) | |
2026 | zlog_debug("update routes to neighbor %s", | |
2027 | inet_ntoa(to->sin_addr)); | |
2028 | else | |
2029 | zlog_debug("update routes on interface %s ifindex %d", | |
2030 | ifc->ifp->name, ifc->ifp->ifindex); | |
2031 | } | |
718e3744 | 2032 | |
045c5389 RW |
2033 | /* Get RIP interface. */ |
2034 | ri = ifc->ifp->info; | |
2035 | rip = ri->rip; | |
2036 | ||
d62a17ae | 2037 | /* Set output stream. */ |
2038 | s = rip->obuf; | |
2039 | ||
2040 | /* Reset stream and RTE counter. */ | |
2041 | stream_reset(s); | |
2042 | rtemax = RIP_MAX_RTE; | |
2043 | ||
d62a17ae | 2044 | /* If output interface is in simple password authentication mode, we |
2045 | need space for authentication data. */ | |
2046 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2047 | rtemax -= 1; | |
2048 | ||
2049 | /* If output interface is in MD5 authentication mode, we need space | |
2050 | for authentication header and data. */ | |
2051 | if (ri->auth_type == RIP_AUTH_MD5) | |
2052 | rtemax -= 2; | |
2053 | ||
2054 | /* If output interface is in simple password authentication mode | |
2055 | and string or keychain is specified we need space for auth. data */ | |
2056 | if (ri->auth_type != RIP_NO_AUTH) { | |
2057 | if (ri->key_chain) { | |
2058 | struct keychain *keychain; | |
2059 | ||
2060 | keychain = keychain_lookup(ri->key_chain); | |
2061 | if (keychain) | |
2062 | key = key_lookup_for_send(keychain); | |
2063 | } | |
2064 | /* to be passed to auth functions later */ | |
2065 | rip_auth_prepare_str_send(ri, key, auth_str, | |
2066 | RIP_AUTH_SIMPLE_SIZE); | |
558c6842 | 2067 | if (strlen(auth_str) == 0) |
2068 | return; | |
d62a17ae | 2069 | } |
2070 | ||
2071 | if (version == RIPv1) { | |
2072 | memcpy(&ifaddrclass, ifc->address, sizeof(struct prefix_ipv4)); | |
2073 | apply_classful_mask_ipv4(&ifaddrclass); | |
2074 | subnetted = 0; | |
2075 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) | |
2076 | subnetted = 1; | |
2077 | } | |
2078 | ||
2079 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) | |
2080 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
2081 | rinfo = listgetdata(listhead(list)); | |
2082 | /* For RIPv1, if we are subnetted, output subnets in our | |
2083 | * network */ | |
2084 | /* that have the same mask as the output "interface". | |
2085 | * For other */ | |
2086 | /* networks, only the classfull version is output. */ | |
2087 | ||
2088 | if (version == RIPv1) { | |
2089 | p = (struct prefix_ipv4 *)&rp->p; | |
2090 | ||
2091 | if (IS_RIP_DEBUG_PACKET) | |
2092 | zlog_debug( | |
2093 | "RIPv1 mask check, %s/%d considered for output", | |
2094 | inet_ntoa(rp->p.u.prefix4), | |
2095 | rp->p.prefixlen); | |
2096 | ||
2097 | if (subnetted | |
2098 | && prefix_match( | |
2099 | (struct prefix *)&ifaddrclass, | |
2100 | &rp->p)) { | |
2101 | if ((ifc->address->prefixlen | |
2102 | != rp->p.prefixlen) | |
2103 | && (rp->p.prefixlen != 32)) | |
2104 | continue; | |
2105 | } else { | |
2106 | memcpy(&classfull, &rp->p, | |
2107 | sizeof(struct prefix_ipv4)); | |
2108 | apply_classful_mask_ipv4(&classfull); | |
2109 | if (rp->p.u.prefix4.s_addr != 0 | |
2110 | && classfull.prefixlen | |
2111 | != rp->p.prefixlen) | |
2112 | continue; | |
2113 | } | |
2114 | if (IS_RIP_DEBUG_PACKET) | |
2115 | zlog_debug( | |
2116 | "RIPv1 mask check, %s/%d made it through", | |
2117 | inet_ntoa(rp->p.u.prefix4), | |
2118 | rp->p.prefixlen); | |
2119 | } else | |
2120 | p = (struct prefix_ipv4 *)&rp->p; | |
2121 | ||
2122 | /* Apply output filters. */ | |
2123 | ret = rip_filter(RIP_FILTER_OUT, p, ri); | |
2124 | if (ret < 0) | |
2125 | continue; | |
2126 | ||
2127 | /* Changed route only output. */ | |
2128 | if (route_type == rip_changed_route | |
2129 | && (!(rinfo->flags & RIP_RTF_CHANGED))) | |
2130 | continue; | |
2131 | ||
2132 | /* Split horizon. */ | |
2133 | /* if (split_horizon == rip_split_horizon) */ | |
2134 | if (ri->split_horizon == RIP_SPLIT_HORIZON) { | |
2135 | /* | |
2136 | * We perform split horizon for RIP and | |
2137 | * connected route. | |
2138 | * For rip routes, we want to suppress the route | |
2139 | * if we would | |
2140 | * end up sending the route back on the | |
2141 | * interface that we | |
2142 | * learned it from, with a higher metric. For | |
2143 | * connected routes, | |
2144 | * we suppress the route if the prefix is a | |
2145 | * subset of the | |
2146 | * source address that we are going to use for | |
2147 | * the packet | |
2148 | * (in order to handle the case when multiple | |
2149 | * subnets are | |
2150 | * configured on the same interface). | |
2151 | */ | |
2152 | int suppress = 0; | |
2153 | struct rip_info *tmp_rinfo = NULL; | |
9920df07 | 2154 | struct connected *tmp_ifc = NULL; |
d62a17ae | 2155 | |
2156 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
2157 | tmp_rinfo)) | |
2158 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP | |
dd127197 | 2159 | && tmp_rinfo->nh.ifindex |
d62a17ae | 2160 | == ifc->ifp->ifindex) { |
2161 | suppress = 1; | |
2162 | break; | |
2163 | } | |
2164 | ||
2165 | if (!suppress | |
9920df07 | 2166 | && rinfo->type == ZEBRA_ROUTE_CONNECT) { |
2167 | for (ALL_LIST_ELEMENTS_RO( | |
2168 | ifc->ifp->connected, | |
2169 | listnode, tmp_ifc)) | |
2170 | if (prefix_match( | |
2171 | (struct prefix *)p, | |
2172 | tmp_ifc->address)) { | |
2173 | suppress = 1; | |
2174 | break; | |
2175 | } | |
2176 | } | |
d62a17ae | 2177 | |
2178 | if (suppress) | |
2179 | continue; | |
2180 | } | |
2181 | ||
2182 | /* Preparation for route-map. */ | |
2183 | rinfo->metric_set = 0; | |
2184 | rinfo->nexthop_out.s_addr = 0; | |
2185 | rinfo->metric_out = rinfo->metric; | |
2186 | rinfo->tag_out = rinfo->tag; | |
2187 | rinfo->ifindex_out = ifc->ifp->ifindex; | |
2188 | ||
2189 | /* In order to avoid some local loops, | |
2190 | * if the RIP route has a nexthop via this interface, | |
2191 | * keep the nexthop, | |
2192 | * otherwise set it to 0. The nexthop should not be | |
2193 | * propagated | |
2194 | * beyond the local broadcast/multicast area in order | |
2195 | * to avoid an IGP multi-level recursive look-up. | |
2196 | * see (4.4) | |
2197 | */ | |
dd127197 DS |
2198 | if (rinfo->nh.ifindex == ifc->ifp->ifindex) |
2199 | rinfo->nexthop_out = rinfo->nh.gate.ipv4; | |
d62a17ae | 2200 | |
2201 | /* Interface route-map */ | |
2202 | if (ri->routemap[RIP_FILTER_OUT]) { | |
2203 | ret = route_map_apply( | |
2204 | ri->routemap[RIP_FILTER_OUT], | |
2205 | (struct prefix *)p, RMAP_RIP, rinfo); | |
2206 | ||
2207 | if (ret == RMAP_DENYMATCH) { | |
2208 | if (IS_RIP_DEBUG_PACKET) | |
2209 | zlog_debug( | |
2210 | "RIP %s/%d is filtered by route-map out", | |
2211 | inet_ntoa(p->prefix), | |
2212 | p->prefixlen); | |
2213 | continue; | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | /* Apply redistribute route map - continue, if deny */ | |
2218 | if (rip->route_map[rinfo->type].name | |
2219 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) { | |
2220 | ret = route_map_apply( | |
2221 | rip->route_map[rinfo->type].map, | |
2222 | (struct prefix *)p, RMAP_RIP, rinfo); | |
2223 | ||
2224 | if (ret == RMAP_DENYMATCH) { | |
2225 | if (IS_RIP_DEBUG_PACKET) | |
2226 | zlog_debug( | |
2227 | "%s/%d is filtered by route-map", | |
2228 | inet_ntoa(p->prefix), | |
2229 | p->prefixlen); | |
2230 | continue; | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | /* When route-map does not set metric. */ | |
2235 | if (!rinfo->metric_set) { | |
2236 | /* If redistribute metric is set. */ | |
2237 | if (rip->route_map[rinfo->type].metric_config | |
2238 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
2239 | rinfo->metric_out = | |
2240 | rip->route_map[rinfo->type] | |
2241 | .metric; | |
2242 | } else { | |
2243 | /* If the route is not connected or | |
2244 | localy generated | |
2245 | one, use default-metric value*/ | |
2246 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
2247 | && rinfo->type | |
2248 | != ZEBRA_ROUTE_CONNECT | |
2249 | && rinfo->metric | |
2250 | != RIP_METRIC_INFINITY) | |
2251 | rinfo->metric_out = | |
2252 | rip->default_metric; | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | /* Apply offset-list */ | |
2257 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
2258 | rip_offset_list_apply_out(p, ifc->ifp, | |
2259 | &rinfo->metric_out); | |
2260 | ||
2261 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2262 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2263 | ||
2264 | /* Perform split-horizon with poisoned reverse | |
2265 | * for RIP and connected routes. | |
2266 | **/ | |
2267 | if (ri->split_horizon | |
2268 | == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
2269 | /* | |
2270 | * We perform split horizon for RIP and | |
2271 | * connected route. | |
2272 | * For rip routes, we want to suppress the route | |
2273 | * if we would | |
2274 | * end up sending the route back on the | |
2275 | * interface that we | |
2276 | * learned it from, with a higher metric. For | |
2277 | * connected routes, | |
2278 | * we suppress the route if the prefix is a | |
2279 | * subset of the | |
2280 | * source address that we are going to use for | |
2281 | * the packet | |
2282 | * (in order to handle the case when multiple | |
2283 | * subnets are | |
2284 | * configured on the same interface). | |
2285 | */ | |
2286 | struct rip_info *tmp_rinfo = NULL; | |
9920df07 | 2287 | struct connected *tmp_ifc = NULL; |
d62a17ae | 2288 | |
2289 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
2290 | tmp_rinfo)) | |
2291 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP | |
dd127197 | 2292 | && tmp_rinfo->nh.ifindex |
996c9314 | 2293 | == ifc->ifp->ifindex) |
9920df07 | 2294 | rinfo->metric_out = |
d62a17ae | 2295 | RIP_METRIC_INFINITY; |
aea175a8 | 2296 | |
9920df07 | 2297 | if (rinfo->metric_out != RIP_METRIC_INFINITY |
2298 | && rinfo->type == ZEBRA_ROUTE_CONNECT) { | |
2299 | for (ALL_LIST_ELEMENTS_RO( | |
2300 | ifc->ifp->connected, | |
2301 | listnode, tmp_ifc)) | |
2302 | if (prefix_match( | |
2303 | (struct prefix *)p, | |
2304 | tmp_ifc->address)) { | |
2305 | rinfo->metric_out = | |
2306 | RIP_METRIC_INFINITY; | |
2307 | break; | |
2308 | } | |
2309 | } | |
d62a17ae | 2310 | } |
2311 | ||
2312 | /* Prepare preamble, auth headers, if needs be */ | |
2313 | if (num == 0) { | |
2314 | stream_putc(s, RIP_RESPONSE); | |
2315 | stream_putc(s, version); | |
2316 | stream_putw(s, 0); | |
2317 | ||
2318 | /* auth header for !v1 && !no_auth */ | |
2319 | if ((ri->auth_type != RIP_NO_AUTH) | |
2320 | && (version != RIPv1)) | |
2321 | doff = rip_auth_header_write( | |
2322 | s, ri, key, auth_str, | |
2323 | RIP_AUTH_SIMPLE_SIZE); | |
2324 | } | |
2325 | ||
2326 | /* Write RTE to the stream. */ | |
2327 | num = rip_write_rte(num, s, p, version, rinfo); | |
2328 | if (num == rtemax) { | |
2329 | if (version == RIPv2 | |
2330 | && 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, | |
2336 | ifc); | |
2337 | ||
2338 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2339 | rip_packet_dump((struct rip_packet *) | |
2340 | STREAM_DATA(s), | |
2341 | stream_get_endp(s), | |
2342 | "SEND"); | |
2343 | num = 0; | |
2344 | stream_reset(s); | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | /* Flush unwritten RTE. */ | |
2349 | if (num != 0) { | |
2350 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
2351 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2352 | RIP_AUTH_SIMPLE_SIZE); | |
2353 | ||
2354 | ret = rip_send_packet(STREAM_DATA(s), stream_get_endp(s), to, | |
2355 | ifc); | |
2356 | ||
2357 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2358 | rip_packet_dump((struct rip_packet *)STREAM_DATA(s), | |
2359 | stream_get_endp(s), "SEND"); | |
2360 | stream_reset(s); | |
2361 | } | |
2362 | ||
2363 | /* Statistics updates. */ | |
2364 | ri->sent_updates++; | |
718e3744 | 2365 | } |
2366 | ||
2367 | /* Send RIP packet to the interface. */ | |
d7c0a89a | 2368 | static void rip_update_interface(struct connected *ifc, uint8_t version, |
d62a17ae | 2369 | int route_type) |
2370 | { | |
2371 | struct interface *ifp = ifc->ifp; | |
2372 | struct rip_interface *ri = ifp->info; | |
2373 | struct sockaddr_in to; | |
2374 | ||
2375 | /* When RIP version is 2 and multicast enable interface. */ | |
2376 | if (version == RIPv2 && !ri->v2_broadcast && if_is_multicast(ifp)) { | |
2377 | if (IS_RIP_DEBUG_EVENT) | |
2378 | zlog_debug("multicast announce on %s ", ifp->name); | |
2379 | ||
2380 | rip_output_process(ifc, NULL, route_type, version); | |
2381 | return; | |
2382 | } | |
2383 | ||
2384 | /* If we can't send multicast packet, send it with unicast. */ | |
2385 | if (if_is_broadcast(ifp) || if_is_pointopoint(ifp)) { | |
2386 | if (ifc->address->family == AF_INET) { | |
2387 | /* Destination address and port setting. */ | |
2388 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2389 | if (ifc->destination) | |
2390 | /* use specified broadcast or peer destination | |
2391 | * addr */ | |
2392 | to.sin_addr = ifc->destination->u.prefix4; | |
2393 | else if (ifc->address->prefixlen < IPV4_MAX_PREFIXLEN) | |
2394 | /* calculate the appropriate broadcast address | |
2395 | */ | |
2396 | to.sin_addr.s_addr = ipv4_broadcast_addr( | |
2397 | ifc->address->u.prefix4.s_addr, | |
2398 | ifc->address->prefixlen); | |
2399 | else | |
2400 | /* do not know where to send the packet */ | |
2401 | return; | |
2402 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2403 | ||
2404 | if (IS_RIP_DEBUG_EVENT) | |
2405 | zlog_debug("%s announce to %s on %s", | |
2406 | CONNECTED_PEER(ifc) ? "unicast" | |
2407 | : "broadcast", | |
2408 | inet_ntoa(to.sin_addr), ifp->name); | |
2409 | ||
2410 | rip_output_process(ifc, &to, route_type, version); | |
2411 | } | |
2412 | } | |
718e3744 | 2413 | } |
2414 | ||
2415 | /* Update send to all interface and neighbor. */ | |
045c5389 | 2416 | static void rip_update_process(struct rip *rip, int route_type) |
d62a17ae | 2417 | { |
045c5389 | 2418 | struct vrf *vrf = vrf_lookup_by_id(rip->vrf_id); |
d62a17ae | 2419 | struct listnode *ifnode, *ifnnode; |
2420 | struct connected *connected; | |
2421 | struct interface *ifp; | |
2422 | struct rip_interface *ri; | |
2423 | struct route_node *rp; | |
2424 | struct sockaddr_in to; | |
2425 | struct prefix *p; | |
2426 | ||
2427 | /* Send RIP update to each interface. */ | |
451fda4f | 2428 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 2429 | if (if_is_loopback(ifp)) |
2430 | continue; | |
2431 | ||
2432 | if (!if_is_operative(ifp)) | |
2433 | continue; | |
2434 | ||
2435 | /* Fetch RIP interface information. */ | |
2436 | ri = ifp->info; | |
2437 | ||
2438 | /* When passive interface is specified, suppress announce to the | |
2439 | interface. */ | |
2440 | if (ri->passive) | |
2441 | continue; | |
2442 | ||
2443 | if (ri->running) { | |
2444 | /* | |
2445 | * If there is no version configuration in the | |
2446 | * interface, | |
2447 | * use rip's version setting. | |
2448 | */ | |
2449 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) | |
2450 | ? rip->version_send | |
2451 | : ri->ri_send); | |
2452 | ||
2453 | if (IS_RIP_DEBUG_EVENT) | |
2454 | zlog_debug("SEND UPDATE to %s ifindex %d", | |
2455 | ifp->name, ifp->ifindex); | |
2456 | ||
2457 | /* send update on each connected network */ | |
2458 | for (ALL_LIST_ELEMENTS(ifp->connected, ifnode, ifnnode, | |
2459 | connected)) { | |
2460 | if (connected->address->family == AF_INET) { | |
2461 | if (vsend & RIPv1) | |
2462 | rip_update_interface( | |
2463 | connected, RIPv1, | |
2464 | route_type); | |
2465 | if ((vsend & RIPv2) | |
2466 | && if_is_multicast(ifp)) | |
2467 | rip_update_interface( | |
2468 | connected, RIPv2, | |
2469 | route_type); | |
2470 | } | |
2471 | } | |
2472 | } | |
2473 | } | |
2474 | ||
2475 | /* RIP send updates to each neighbor. */ | |
2476 | for (rp = route_top(rip->neighbor); rp; rp = route_next(rp)) | |
2477 | if (rp->info != NULL) { | |
2478 | p = &rp->p; | |
2479 | ||
2480 | connected = if_lookup_address(&p->u.prefix4, AF_INET, | |
045c5389 | 2481 | rip->vrf_id); |
d62a17ae | 2482 | if (!connected) { |
2483 | zlog_warn( | |
0437e105 | 2484 | "Neighbor %s doesn't have connected interface!", |
d62a17ae | 2485 | inet_ntoa(p->u.prefix4)); |
2486 | continue; | |
2487 | } | |
2488 | ||
2489 | /* Set destination address and port */ | |
2490 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2491 | to.sin_addr = p->u.prefix4; | |
2492 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2493 | ||
2494 | /* RIP version is rip's configuration. */ | |
2495 | rip_output_process(connected, &to, route_type, | |
2496 | rip->version_send); | |
b9d92881 | 2497 | } |
718e3744 | 2498 | } |
2499 | ||
2500 | /* RIP's periodical timer. */ | |
d62a17ae | 2501 | static int rip_update(struct thread *t) |
718e3744 | 2502 | { |
045c5389 RW |
2503 | struct rip *rip = THREAD_ARG(t); |
2504 | ||
d62a17ae | 2505 | /* Clear timer pointer. */ |
2506 | rip->t_update = NULL; | |
718e3744 | 2507 | |
d62a17ae | 2508 | if (IS_RIP_DEBUG_EVENT) |
2509 | zlog_debug("update timer fire!"); | |
718e3744 | 2510 | |
d62a17ae | 2511 | /* Process update output. */ |
045c5389 | 2512 | rip_update_process(rip, rip_all_route); |
718e3744 | 2513 | |
d62a17ae | 2514 | /* Triggered updates may be suppressed if a regular update is due by |
2515 | the time the triggered update would be sent. */ | |
2516 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
2517 | rip->trigger = 0; | |
718e3744 | 2518 | |
d62a17ae | 2519 | /* Register myself. */ |
045c5389 | 2520 | rip_event(rip, RIP_UPDATE_EVENT, 0); |
718e3744 | 2521 | |
d62a17ae | 2522 | return 0; |
718e3744 | 2523 | } |
2524 | ||
2525 | /* Walk down the RIP routing table then clear changed flag. */ | |
045c5389 | 2526 | static void rip_clear_changed_flag(struct rip *rip) |
718e3744 | 2527 | { |
d62a17ae | 2528 | struct route_node *rp; |
2529 | struct rip_info *rinfo = NULL; | |
2530 | struct list *list = NULL; | |
2531 | struct listnode *listnode = NULL; | |
718e3744 | 2532 | |
d62a17ae | 2533 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2534 | if ((list = rp->info) != NULL) | |
2535 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
2536 | UNSET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2537 | /* This flag can be set only on the first entry. | |
2538 | */ | |
2539 | break; | |
2540 | } | |
718e3744 | 2541 | } |
2542 | ||
2543 | /* Triggered update interval timer. */ | |
d62a17ae | 2544 | static int rip_triggered_interval(struct thread *t) |
718e3744 | 2545 | { |
045c5389 | 2546 | struct rip *rip = THREAD_ARG(t); |
718e3744 | 2547 | |
d62a17ae | 2548 | rip->t_triggered_interval = NULL; |
718e3744 | 2549 | |
d62a17ae | 2550 | if (rip->trigger) { |
2551 | rip->trigger = 0; | |
2552 | rip_triggered_update(t); | |
2553 | } | |
2554 | return 0; | |
2555 | } | |
718e3744 | 2556 | |
2557 | /* Execute triggered update. */ | |
d62a17ae | 2558 | static int rip_triggered_update(struct thread *t) |
718e3744 | 2559 | { |
045c5389 | 2560 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 2561 | int interval; |
718e3744 | 2562 | |
d62a17ae | 2563 | /* Clear thred pointer. */ |
2564 | rip->t_triggered_update = NULL; | |
718e3744 | 2565 | |
d62a17ae | 2566 | /* Cancel interval timer. */ |
2567 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
2568 | rip->trigger = 0; | |
718e3744 | 2569 | |
d62a17ae | 2570 | /* Logging triggered update. */ |
2571 | if (IS_RIP_DEBUG_EVENT) | |
2572 | zlog_debug("triggered update!"); | |
718e3744 | 2573 | |
d62a17ae | 2574 | /* Split Horizon processing is done when generating triggered |
2575 | updates as well as normal updates (see section 2.6). */ | |
045c5389 | 2576 | rip_update_process(rip, rip_changed_route); |
718e3744 | 2577 | |
d62a17ae | 2578 | /* Once all of the triggered updates have been generated, the route |
2579 | change flags should be cleared. */ | |
045c5389 | 2580 | rip_clear_changed_flag(rip); |
718e3744 | 2581 | |
d62a17ae | 2582 | /* After a triggered update is sent, a timer should be set for a |
2583 | random interval between 1 and 5 seconds. If other changes that | |
2584 | would trigger updates occur before the timer expires, a single | |
2585 | update is triggered when the timer expires. */ | |
2586 | interval = (random() % 5) + 1; | |
718e3744 | 2587 | |
d62a17ae | 2588 | rip->t_triggered_interval = NULL; |
045c5389 | 2589 | thread_add_timer(master, rip_triggered_interval, rip, interval, |
d62a17ae | 2590 | &rip->t_triggered_interval); |
718e3744 | 2591 | |
d62a17ae | 2592 | return 0; |
718e3744 | 2593 | } |
2594 | ||
2595 | /* Withdraw redistributed route. */ | |
045c5389 | 2596 | void rip_redistribute_withdraw(struct rip *rip, int type) |
d62a17ae | 2597 | { |
2598 | struct route_node *rp; | |
2599 | struct rip_info *rinfo = NULL; | |
2600 | struct list *list = NULL; | |
2601 | ||
d62a17ae | 2602 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2603 | if ((list = rp->info) != NULL) { | |
2604 | rinfo = listgetdata(listhead(list)); | |
2605 | if (rinfo->type == type | |
2606 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) { | |
2607 | /* Perform poisoned reverse. */ | |
2608 | rinfo->metric = RIP_METRIC_INFINITY; | |
2609 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
2610 | rip_garbage_collect, | |
2611 | rip->garbage_time); | |
2612 | RIP_TIMER_OFF(rinfo->t_timeout); | |
2613 | rinfo->flags |= RIP_RTF_CHANGED; | |
2614 | ||
2615 | if (IS_RIP_DEBUG_EVENT) { | |
2616 | struct prefix_ipv4 *p = | |
2617 | (struct prefix_ipv4 *)&rp->p; | |
2618 | ||
2619 | zlog_debug( | |
2620 | "Poisone %s/%d on the interface %s with an infinity metric [withdraw]", | |
2621 | inet_ntoa(p->prefix), | |
2622 | p->prefixlen, | |
dd127197 DS |
2623 | ifindex2ifname( |
2624 | rinfo->nh.ifindex, | |
045c5389 | 2625 | rip->vrf_id)); |
d62a17ae | 2626 | } |
2627 | ||
045c5389 | 2628 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 2629 | } |
2630 | } | |
2631 | } | |
2632 | ||
045c5389 RW |
2633 | struct rip *rip_lookup_by_vrf_id(vrf_id_t vrf_id) |
2634 | { | |
2635 | struct vrf *vrf; | |
2636 | ||
2637 | vrf = vrf_lookup_by_id(vrf_id); | |
2638 | if (!vrf) | |
2639 | return NULL; | |
2640 | ||
2641 | return vrf->info; | |
2642 | } | |
2643 | ||
d62a17ae | 2644 | /* Create new RIP instance and set it to global variable. */ |
045c5389 | 2645 | struct rip *rip_create(struct vrf *vrf, int socket) |
718e3744 | 2646 | { |
045c5389 RW |
2647 | struct rip *rip; |
2648 | struct interface *ifp; | |
2649 | ||
d62a17ae | 2650 | rip = XCALLOC(MTYPE_RIP, sizeof(struct rip)); |
718e3744 | 2651 | |
d62a17ae | 2652 | /* Set initial value. */ |
8c9226c2 RW |
2653 | rip->ecmp = yang_get_default_bool("%s/allow-ecmp", RIP_INSTANCE); |
2654 | rip->default_metric = | |
2655 | yang_get_default_uint8("%s/default-metric", RIP_INSTANCE); | |
2656 | rip->distance = | |
2657 | yang_get_default_uint8("%s/distance/default", RIP_INSTANCE); | |
44f2f852 RW |
2658 | rip->passive_default = |
2659 | yang_get_default_bool("%s/passive-default", RIP_INSTANCE); | |
8c9226c2 RW |
2660 | rip->garbage_time = yang_get_default_uint32("%s/timers/flush-interval", |
2661 | RIP_INSTANCE); | |
2662 | rip->timeout_time = yang_get_default_uint32( | |
2663 | "%s/timers/holddown-interval", RIP_INSTANCE); | |
2664 | rip->update_time = yang_get_default_uint32("%s/timers/update-interval", | |
2665 | RIP_INSTANCE); | |
2666 | rip->version_send = | |
2667 | yang_get_default_enum("%s/version/send", RIP_INSTANCE); | |
2668 | rip->version_recv = | |
2669 | yang_get_default_enum("%s/version/receive", RIP_INSTANCE); | |
718e3744 | 2670 | |
ca046902 | 2671 | /* Initialize RIP data structures. */ |
d62a17ae | 2672 | rip->table = route_table_init(); |
045c5389 | 2673 | route_table_set_info(rip->table, rip); |
d62a17ae | 2674 | rip->neighbor = route_table_init(); |
29e897ad RW |
2675 | rip->peer_list = list_new(); |
2676 | rip->peer_list->cmp = (int (*)(void *, void *))rip_peer_list_cmp; | |
711915d2 | 2677 | rip->peer_list->del = rip_peer_list_del; |
2826309c RW |
2678 | rip->distance_table = route_table_init(); |
2679 | rip->distance_table->cleanup = rip_distance_table_node_cleanup; | |
ca046902 | 2680 | rip->enable_interface = vector_init(1); |
1205fdc4 | 2681 | rip->enable_network = route_table_init(); |
5a29c0d5 | 2682 | rip->passive_nondefault = vector_init(1); |
3f21c8c4 RW |
2683 | rip->offset_list_master = list_new(); |
2684 | rip->offset_list_master->cmp = (int (*)(void *, void *))offset_list_cmp; | |
2685 | rip->offset_list_master->del = (void (*)(void *))offset_list_del; | |
718e3744 | 2686 | |
2d2eaa13 RW |
2687 | /* Distribute list install. */ |
2688 | rip->distribute_ctx = | |
2689 | distribute_list_ctx_create(vrf_lookup_by_id(VRF_DEFAULT)); | |
2690 | distribute_list_add_hook(rip->distribute_ctx, rip_distribute_update); | |
2691 | distribute_list_delete_hook(rip->distribute_ctx, rip_distribute_update); | |
2692 | ||
d62a17ae | 2693 | /* Make output stream. */ |
2694 | rip->obuf = stream_new(1500); | |
16705130 | 2695 | |
8c9226c2 RW |
2696 | /* Set socket. */ |
2697 | rip->sock = socket; | |
16705130 | 2698 | |
d62a17ae | 2699 | /* Create read and timer thread. */ |
045c5389 RW |
2700 | rip_event(rip, RIP_READ, rip->sock); |
2701 | rip_event(rip, RIP_UPDATE_EVENT, 1); | |
2d2eaa13 | 2702 | |
045c5389 RW |
2703 | /* Link RIP instance to VRF. */ |
2704 | rip->vrf_id = vrf->vrf_id; | |
2705 | vrf->info = rip; | |
2706 | FOR_ALL_INTERFACES (vrf, ifp) { | |
2707 | struct rip_interface *ri; | |
2708 | ||
2709 | ri = ifp->info; | |
2710 | ri->rip = rip; | |
2711 | } | |
2712 | ||
2713 | return rip; | |
d62a17ae | 2714 | } |
718e3744 | 2715 | |
d62a17ae | 2716 | /* Sned RIP request to the destination. */ |
2717 | int rip_request_send(struct sockaddr_in *to, struct interface *ifp, | |
d7c0a89a | 2718 | uint8_t version, struct connected *connected) |
d62a17ae | 2719 | { |
2720 | struct rte *rte; | |
2721 | struct rip_packet rip_packet; | |
2722 | struct listnode *node, *nnode; | |
2723 | ||
2724 | memset(&rip_packet, 0, sizeof(rip_packet)); | |
2725 | ||
2726 | rip_packet.command = RIP_REQUEST; | |
2727 | rip_packet.version = version; | |
2728 | rte = rip_packet.rte; | |
2729 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
2730 | ||
2731 | if (connected) { | |
2732 | /* | |
2733 | * connected is only sent for ripv1 case, or when | |
2734 | * interface does not support multicast. Caller loops | |
2735 | * over each connected address for this case. | |
2736 | */ | |
d7c0a89a | 2737 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2738 | to, connected) |
2739 | != sizeof(rip_packet)) | |
2740 | return -1; | |
2741 | else | |
2742 | return sizeof(rip_packet); | |
2743 | } | |
718e3744 | 2744 | |
d62a17ae | 2745 | /* send request on each connected network */ |
2746 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, connected)) { | |
2747 | struct prefix_ipv4 *p; | |
718e3744 | 2748 | |
d62a17ae | 2749 | p = (struct prefix_ipv4 *)connected->address; |
718e3744 | 2750 | |
d62a17ae | 2751 | if (p->family != AF_INET) |
2752 | continue; | |
f6eacff4 | 2753 | |
d7c0a89a | 2754 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2755 | to, connected) |
2756 | != sizeof(rip_packet)) | |
2757 | return -1; | |
2758 | } | |
2759 | return sizeof(rip_packet); | |
718e3744 | 2760 | } |
2761 | ||
d62a17ae | 2762 | static int rip_update_jitter(unsigned long time) |
718e3744 | 2763 | { |
239389ba | 2764 | #define JITTER_BOUND 4 |
d62a17ae | 2765 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. |
2766 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2767 | The RIPv2 RFC says jitter should be small compared to | |
2768 | update_time. We consider 1/JITTER_BOUND to be small. | |
2769 | */ | |
2770 | ||
2771 | int jitter_input = time; | |
2772 | int jitter; | |
2773 | ||
2774 | if (jitter_input < JITTER_BOUND) | |
2775 | jitter_input = JITTER_BOUND; | |
2776 | ||
2777 | jitter = (((random() % ((jitter_input * 2) + 1)) - jitter_input)); | |
2778 | ||
2779 | return jitter / JITTER_BOUND; | |
2780 | } | |
2781 | ||
045c5389 | 2782 | void rip_event(struct rip *rip, enum rip_event event, int sock) |
d62a17ae | 2783 | { |
2784 | int jitter = 0; | |
2785 | ||
2786 | switch (event) { | |
2787 | case RIP_READ: | |
2788 | rip->t_read = NULL; | |
045c5389 | 2789 | thread_add_read(master, rip_read, rip, sock, &rip->t_read); |
d62a17ae | 2790 | break; |
2791 | case RIP_UPDATE_EVENT: | |
2792 | RIP_TIMER_OFF(rip->t_update); | |
2793 | jitter = rip_update_jitter(rip->update_time); | |
045c5389 | 2794 | thread_add_timer(master, rip_update, rip, |
d62a17ae | 2795 | sock ? 2 : rip->update_time + jitter, |
2796 | &rip->t_update); | |
2797 | break; | |
2798 | case RIP_TRIGGERED_UPDATE: | |
2799 | if (rip->t_triggered_interval) | |
2800 | rip->trigger = 1; | |
2801 | else | |
045c5389 | 2802 | thread_add_event(master, rip_triggered_update, rip, 0, |
d62a17ae | 2803 | &rip->t_triggered_update); |
2804 | break; | |
2805 | default: | |
2806 | break; | |
2807 | } | |
718e3744 | 2808 | } |
6b0655a2 | 2809 | |
2c239705 | 2810 | #if 0 |
dc63bfd4 | 2811 | static void |
216565ab | 2812 | rip_update_default_metric (void) |
718e3744 | 2813 | { |
2814 | struct route_node *np; | |
bce8e868 LF |
2815 | struct rip_info *rinfo = NULL; |
2816 | struct list *list = NULL; | |
2817 | struct listnode *listnode = NULL; | |
718e3744 | 2818 | |
2819 | for (np = route_top (rip->table); np; np = route_next (np)) | |
bce8e868 LF |
2820 | if ((list = np->info) != NULL) |
2821 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
2822 | if (rinfo->type != ZEBRA_ROUTE_RIP && rinfo->type != ZEBRA_ROUTE_CONNECT) | |
2823 | rinfo->metric = rip->default_metric; | |
718e3744 | 2824 | } |
2c239705 | 2825 | #endif |
718e3744 | 2826 | |
23b23d8c | 2827 | struct rip_distance *rip_distance_new(void) |
718e3744 | 2828 | { |
d62a17ae | 2829 | return XCALLOC(MTYPE_RIP_DISTANCE, sizeof(struct rip_distance)); |
718e3744 | 2830 | } |
2831 | ||
23b23d8c | 2832 | void rip_distance_free(struct rip_distance *rdistance) |
d62a17ae | 2833 | { |
2826309c RW |
2834 | if (rdistance->access_list) |
2835 | free(rdistance->access_list); | |
d62a17ae | 2836 | XFREE(MTYPE_RIP_DISTANCE, rdistance); |
718e3744 | 2837 | } |
2838 | ||
2826309c RW |
2839 | static void rip_distance_table_node_cleanup(struct route_table *table, |
2840 | struct route_node *node) | |
d62a17ae | 2841 | { |
d62a17ae | 2842 | struct rip_distance *rdistance; |
718e3744 | 2843 | |
2826309c RW |
2844 | rdistance = node->info; |
2845 | if (rdistance) | |
2846 | rip_distance_free(rdistance); | |
d62a17ae | 2847 | } |
2848 | ||
2849 | /* Apply RIP information to distance method. */ | |
045c5389 | 2850 | uint8_t rip_distance_apply(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 2851 | { |
2852 | struct route_node *rn; | |
2853 | struct prefix_ipv4 p; | |
2854 | struct rip_distance *rdistance; | |
2855 | struct access_list *alist; | |
2856 | ||
d62a17ae | 2857 | memset(&p, 0, sizeof(struct prefix_ipv4)); |
2858 | p.family = AF_INET; | |
2859 | p.prefix = rinfo->from; | |
2860 | p.prefixlen = IPV4_MAX_BITLEN; | |
2861 | ||
2862 | /* Check source address. */ | |
2826309c | 2863 | rn = route_node_match(rip->distance_table, (struct prefix *)&p); |
d62a17ae | 2864 | if (rn) { |
2865 | rdistance = rn->info; | |
2866 | route_unlock_node(rn); | |
2867 | ||
2868 | if (rdistance->access_list) { | |
2869 | alist = access_list_lookup(AFI_IP, | |
2870 | rdistance->access_list); | |
2871 | if (alist == NULL) | |
2872 | return 0; | |
2873 | if (access_list_apply(alist, &rinfo->rp->p) | |
2874 | == FILTER_DENY) | |
2875 | return 0; | |
2876 | ||
2877 | return rdistance->distance; | |
2878 | } else | |
2879 | return rdistance->distance; | |
718e3744 | 2880 | } |
718e3744 | 2881 | |
d62a17ae | 2882 | if (rip->distance) |
2883 | return rip->distance; | |
718e3744 | 2884 | |
d62a17ae | 2885 | return 0; |
718e3744 | 2886 | } |
2887 | ||
045c5389 | 2888 | static void rip_distance_show(struct vty *vty, struct rip *rip) |
d62a17ae | 2889 | { |
2890 | struct route_node *rn; | |
2891 | struct rip_distance *rdistance; | |
2892 | int header = 1; | |
2893 | char buf[BUFSIZ]; | |
2894 | ||
7f8a9cba | 2895 | vty_out(vty, " Distance: (default is %u)\n", |
d62a17ae | 2896 | rip->distance ? rip->distance : ZEBRA_RIP_DISTANCE_DEFAULT); |
2897 | ||
2826309c | 2898 | for (rn = route_top(rip->distance_table); rn; rn = route_next(rn)) |
d62a17ae | 2899 | if ((rdistance = rn->info) != NULL) { |
2900 | if (header) { | |
2901 | vty_out(vty, | |
2902 | " Address Distance List\n"); | |
2903 | header = 0; | |
2904 | } | |
2905 | sprintf(buf, "%s/%d", inet_ntoa(rn->p.u.prefix4), | |
2906 | rn->p.prefixlen); | |
2907 | vty_out(vty, " %-20s %4d %s\n", buf, | |
2908 | rdistance->distance, | |
2909 | rdistance->access_list ? rdistance->access_list | |
2910 | : ""); | |
2911 | } | |
718e3744 | 2912 | } |
2913 | ||
8478ae7e | 2914 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
045c5389 | 2915 | void rip_ecmp_disable(struct rip *rip) |
d62a17ae | 2916 | { |
2917 | struct route_node *rp; | |
2918 | struct rip_info *rinfo, *tmp_rinfo; | |
2919 | struct list *list; | |
2920 | struct listnode *node, *nextnode; | |
2921 | ||
d62a17ae | 2922 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2923 | if ((list = rp->info) != NULL && listcount(list) > 1) { | |
2924 | rinfo = listgetdata(listhead(list)); | |
2925 | if (!rip_route_rte(rinfo)) | |
2926 | continue; | |
2927 | ||
2928 | /* Drop all other entries, except the first one. */ | |
2929 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
2930 | if (tmp_rinfo != rinfo) { | |
2931 | RIP_TIMER_OFF(tmp_rinfo->t_timeout); | |
2932 | RIP_TIMER_OFF( | |
2933 | tmp_rinfo->t_garbage_collect); | |
2934 | list_delete_node(list, node); | |
2935 | rip_info_free(tmp_rinfo); | |
2936 | } | |
2937 | ||
2938 | /* Update zebra. */ | |
045c5389 | 2939 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 2940 | |
2941 | /* Set the route change flag. */ | |
2942 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2943 | ||
2944 | /* Signal the output process to trigger an update. */ | |
045c5389 | 2945 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 2946 | } |
8478ae7e LF |
2947 | } |
2948 | ||
718e3744 | 2949 | /* Print out routes update time. */ |
d62a17ae | 2950 | static void rip_vty_out_uptime(struct vty *vty, struct rip_info *rinfo) |
718e3744 | 2951 | { |
d62a17ae | 2952 | time_t clock; |
2953 | struct tm *tm; | |
718e3744 | 2954 | #define TIME_BUF 25 |
d62a17ae | 2955 | char timebuf[TIME_BUF]; |
2956 | struct thread *thread; | |
2957 | ||
2958 | if ((thread = rinfo->t_timeout) != NULL) { | |
2959 | clock = thread_timer_remain_second(thread); | |
2960 | tm = gmtime(&clock); | |
2961 | strftime(timebuf, TIME_BUF, "%M:%S", tm); | |
2962 | vty_out(vty, "%5s", timebuf); | |
2963 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
2964 | clock = thread_timer_remain_second(thread); | |
2965 | tm = gmtime(&clock); | |
2966 | strftime(timebuf, TIME_BUF, "%M:%S", tm); | |
2967 | vty_out(vty, "%5s", timebuf); | |
2968 | } | |
2969 | } | |
2970 | ||
2971 | static const char *rip_route_type_print(int sub_type) | |
2972 | { | |
2973 | switch (sub_type) { | |
2974 | case RIP_ROUTE_RTE: | |
2975 | return "n"; | |
2976 | case RIP_ROUTE_STATIC: | |
2977 | return "s"; | |
2978 | case RIP_ROUTE_DEFAULT: | |
2979 | return "d"; | |
2980 | case RIP_ROUTE_REDISTRIBUTE: | |
2981 | return "r"; | |
2982 | case RIP_ROUTE_INTERFACE: | |
2983 | return "i"; | |
2984 | default: | |
2985 | return "?"; | |
2986 | } | |
718e3744 | 2987 | } |
2988 | ||
2989 | DEFUN (show_ip_rip, | |
2990 | show_ip_rip_cmd, | |
2991 | "show ip rip", | |
2992 | SHOW_STR | |
2993 | IP_STR | |
2994 | "Show RIP routes\n") | |
2995 | { | |
045c5389 | 2996 | struct rip *rip; |
d62a17ae | 2997 | struct route_node *np; |
2998 | struct rip_info *rinfo = NULL; | |
2999 | struct list *list = NULL; | |
3000 | struct listnode *listnode = NULL; | |
3001 | ||
045c5389 | 3002 | rip = rip_lookup_by_vrf_id(VRF_DEFAULT); |
d62a17ae | 3003 | if (!rip) |
3004 | return CMD_SUCCESS; | |
3005 | ||
3006 | vty_out(vty, | |
3007 | "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP\n" | |
3008 | "Sub-codes:\n" | |
3009 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
3010 | " (i) - interface\n\n" | |
3011 | " Network Next Hop Metric From Tag Time\n"); | |
3012 | ||
3013 | for (np = route_top(rip->table); np; np = route_next(np)) | |
3014 | if ((list = np->info) != NULL) | |
3015 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
3016 | int len; | |
3017 | ||
3018 | len = vty_out( | |
3019 | vty, "%c(%s) %s/%d", | |
3020 | /* np->lock, For debugging. */ | |
3021 | zebra_route_char(rinfo->type), | |
3022 | rip_route_type_print(rinfo->sub_type), | |
3023 | inet_ntoa(np->p.u.prefix4), | |
3024 | np->p.prefixlen); | |
3025 | ||
3026 | len = 24 - len; | |
3027 | ||
3028 | if (len > 0) | |
3029 | vty_out(vty, "%*s", len, " "); | |
3030 | ||
996c9314 | 3031 | switch (rinfo->nh.type) { |
3f5682c8 DS |
3032 | case NEXTHOP_TYPE_IPV4: |
3033 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
d62a17ae | 3034 | vty_out(vty, "%-20s %2d ", |
dd127197 | 3035 | inet_ntoa(rinfo->nh.gate.ipv4), |
d62a17ae | 3036 | rinfo->metric); |
3f5682c8 DS |
3037 | break; |
3038 | case NEXTHOP_TYPE_IFINDEX: | |
d62a17ae | 3039 | vty_out(vty, |
3040 | "0.0.0.0 %2d ", | |
3041 | rinfo->metric); | |
3f5682c8 DS |
3042 | break; |
3043 | case NEXTHOP_TYPE_BLACKHOLE: | |
3044 | vty_out(vty, | |
3045 | "blackhole %2d ", | |
3046 | rinfo->metric); | |
3047 | break; | |
3048 | case NEXTHOP_TYPE_IPV6: | |
3049 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
3050 | vty_out(vty, | |
3051 | "V6 Address Hidden %2d ", | |
3052 | rinfo->metric); | |
3053 | break; | |
3054 | } | |
d62a17ae | 3055 | |
3056 | /* Route which exist in kernel routing table. */ | |
3057 | if ((rinfo->type == ZEBRA_ROUTE_RIP) | |
3058 | && (rinfo->sub_type == RIP_ROUTE_RTE)) { | |
3059 | vty_out(vty, "%-15s ", | |
3060 | inet_ntoa(rinfo->from)); | |
3061 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3062 | (route_tag_t)rinfo->tag); | |
3063 | rip_vty_out_uptime(vty, rinfo); | |
3064 | } else if (rinfo->metric | |
3065 | == RIP_METRIC_INFINITY) { | |
3066 | vty_out(vty, "self "); | |
3067 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3068 | (route_tag_t)rinfo->tag); | |
3069 | rip_vty_out_uptime(vty, rinfo); | |
3070 | } else { | |
3071 | if (rinfo->external_metric) { | |
3072 | len = vty_out( | |
3073 | vty, "self (%s:%d)", | |
3074 | zebra_route_string( | |
3075 | rinfo->type), | |
3076 | rinfo->external_metric); | |
3077 | len = 16 - len; | |
3078 | if (len > 0) | |
3079 | vty_out(vty, "%*s", len, | |
3080 | " "); | |
3081 | } else | |
3082 | vty_out(vty, | |
3083 | "self "); | |
3084 | vty_out(vty, "%3" ROUTE_TAG_PRI, | |
3085 | (route_tag_t)rinfo->tag); | |
3086 | } | |
3087 | ||
3088 | vty_out(vty, "\n"); | |
3089 | } | |
3090 | return CMD_SUCCESS; | |
718e3744 | 3091 | } |
3092 | ||
16705130 | 3093 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3094 | DEFUN (show_ip_rip_status, | |
3095 | show_ip_rip_status_cmd, | |
3096 | "show ip rip status", | |
718e3744 | 3097 | SHOW_STR |
3098 | IP_STR | |
16705130 | 3099 | "Show RIP routes\n" |
718e3744 | 3100 | "IP routing protocol process parameters and statistics\n") |
3101 | { | |
045c5389 RW |
3102 | struct rip *rip; |
3103 | struct vrf *vrf; | |
d62a17ae | 3104 | struct interface *ifp; |
3105 | struct rip_interface *ri; | |
3106 | extern const struct message ri_version_msg[]; | |
3107 | const char *send_version; | |
3108 | const char *receive_version; | |
3109 | ||
045c5389 | 3110 | rip = rip_lookup_by_vrf_id(VRF_DEFAULT); |
d62a17ae | 3111 | if (!rip) |
3112 | return CMD_SUCCESS; | |
3113 | ||
3114 | vty_out(vty, "Routing Protocol is \"rip\"\n"); | |
b745780b | 3115 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 3116 | rip->update_time); |
3117 | vty_out(vty, " next due in %lu seconds\n", | |
3118 | thread_timer_remain_second(rip->t_update)); | |
b745780b RW |
3119 | vty_out(vty, " Timeout after %u seconds,", rip->timeout_time); |
3120 | vty_out(vty, " garbage collect after %u seconds\n", rip->garbage_time); | |
d62a17ae | 3121 | |
3122 | /* Filtering status show. */ | |
03a38493 | 3123 | config_show_distribute(vty, rip->distribute_ctx); |
d62a17ae | 3124 | |
3125 | /* Default metric information. */ | |
282ae30c | 3126 | vty_out(vty, " Default redistribution metric is %u\n", |
d62a17ae | 3127 | rip->default_metric); |
3128 | ||
3129 | /* Redistribute information. */ | |
3130 | vty_out(vty, " Redistributing:"); | |
045c5389 | 3131 | rip_show_redistribute_config(vty, rip); |
d62a17ae | 3132 | vty_out(vty, "\n"); |
3133 | ||
3134 | vty_out(vty, " Default version control: send version %s,", | |
3135 | lookup_msg(ri_version_msg, rip->version_send, NULL)); | |
3136 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3137 | vty_out(vty, " receive any version \n"); | |
3138 | else | |
3139 | vty_out(vty, " receive version %s \n", | |
3140 | lookup_msg(ri_version_msg, rip->version_recv, NULL)); | |
3141 | ||
3142 | vty_out(vty, " Interface Send Recv Key-chain\n"); | |
3143 | ||
045c5389 | 3144 | vrf = vrf_lookup_by_id(rip->vrf_id); |
451fda4f | 3145 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 3146 | ri = ifp->info; |
3147 | ||
3148 | if (!ri->running) | |
3149 | continue; | |
3150 | ||
3151 | if (ri->enable_network || ri->enable_interface) { | |
3152 | if (ri->ri_send == RI_RIP_UNSPEC) | |
3153 | send_version = | |
3154 | lookup_msg(ri_version_msg, | |
3155 | rip->version_send, NULL); | |
3156 | else | |
3157 | send_version = lookup_msg(ri_version_msg, | |
3158 | ri->ri_send, NULL); | |
3159 | ||
3160 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
3161 | receive_version = | |
3162 | lookup_msg(ri_version_msg, | |
3163 | rip->version_recv, NULL); | |
3164 | else | |
3165 | receive_version = lookup_msg( | |
3166 | ri_version_msg, ri->ri_receive, NULL); | |
3167 | ||
3168 | vty_out(vty, " %-17s%-3s %-3s %s\n", ifp->name, | |
3169 | send_version, receive_version, | |
3170 | ri->key_chain ? ri->key_chain : ""); | |
3171 | } | |
3172 | } | |
718e3744 | 3173 | |
d62a17ae | 3174 | vty_out(vty, " Routing for Networks:\n"); |
045c5389 | 3175 | rip_show_network_config(vty, rip); |
718e3744 | 3176 | |
718e3744 | 3177 | { |
d62a17ae | 3178 | int found_passive = 0; |
451fda4f | 3179 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 3180 | ri = ifp->info; |
3181 | ||
3182 | if ((ri->enable_network || ri->enable_interface) | |
3183 | && ri->passive) { | |
3184 | if (!found_passive) { | |
3185 | vty_out(vty, | |
3186 | " Passive Interface(s):\n"); | |
3187 | found_passive = 1; | |
3188 | } | |
3189 | vty_out(vty, " %s\n", ifp->name); | |
3190 | } | |
3191 | } | |
718e3744 | 3192 | } |
3193 | ||
d62a17ae | 3194 | vty_out(vty, " Routing Information Sources:\n"); |
3195 | vty_out(vty, | |
3196 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
045c5389 | 3197 | rip_peer_display(vty, rip); |
718e3744 | 3198 | |
045c5389 | 3199 | rip_distance_show(vty, rip); |
718e3744 | 3200 | |
d62a17ae | 3201 | return CMD_SUCCESS; |
3202 | } | |
718e3744 | 3203 | |
d62a17ae | 3204 | /* RIP configuration write function. */ |
3205 | static int config_write_rip(struct vty *vty) | |
3206 | { | |
3207 | int write = 0; | |
8c9226c2 | 3208 | struct lyd_node *dnode; |
d62a17ae | 3209 | |
8c9226c2 RW |
3210 | dnode = yang_dnode_get(running_config->dnode, |
3211 | "/frr-ripd:ripd/instance"); | |
3212 | if (dnode) { | |
045c5389 RW |
3213 | struct rip *rip; |
3214 | ||
d62a17ae | 3215 | write++; |
3216 | ||
8c9226c2 RW |
3217 | nb_cli_show_dnode_cmds(vty, dnode, false); |
3218 | ||
045c5389 RW |
3219 | rip = rip_lookup_by_vrf_id(VRF_DEFAULT); |
3220 | if (rip) { | |
3221 | /* Distribute configuration. */ | |
3222 | write += config_write_distribute(vty, | |
3223 | rip->distribute_ctx); | |
d62a17ae | 3224 | |
045c5389 RW |
3225 | /* Interface routemap configuration */ |
3226 | write += config_write_if_rmap(vty); | |
3227 | } | |
d62a17ae | 3228 | } |
3229 | return write; | |
3230 | } | |
718e3744 | 3231 | |
d62a17ae | 3232 | /* RIP node structure. */ |
3233 | static struct cmd_node rip_node = {RIP_NODE, "%s(config-router)# ", 1}; | |
718e3744 | 3234 | |
d62a17ae | 3235 | /* Distribute-list update functions. */ |
03a38493 PG |
3236 | static void rip_distribute_update(struct distribute_ctx *ctx, |
3237 | struct distribute *dist) | |
d62a17ae | 3238 | { |
3239 | struct interface *ifp; | |
3240 | struct rip_interface *ri; | |
3241 | struct access_list *alist; | |
3242 | struct prefix_list *plist; | |
8478ae7e | 3243 | |
d62a17ae | 3244 | if (!dist->ifname) |
3245 | return; | |
718e3744 | 3246 | |
d62a17ae | 3247 | ifp = if_lookup_by_name(dist->ifname, VRF_DEFAULT); |
3248 | if (ifp == NULL) | |
3249 | return; | |
718e3744 | 3250 | |
d62a17ae | 3251 | ri = ifp->info; |
6b0655a2 | 3252 | |
d62a17ae | 3253 | if (dist->list[DISTRIBUTE_V4_IN]) { |
3254 | alist = access_list_lookup(AFI_IP, | |
3255 | dist->list[DISTRIBUTE_V4_IN]); | |
3256 | if (alist) | |
3257 | ri->list[RIP_FILTER_IN] = alist; | |
3258 | else | |
3259 | ri->list[RIP_FILTER_IN] = NULL; | |
3260 | } else | |
3261 | ri->list[RIP_FILTER_IN] = NULL; | |
3262 | ||
3263 | if (dist->list[DISTRIBUTE_V4_OUT]) { | |
3264 | alist = access_list_lookup(AFI_IP, | |
3265 | dist->list[DISTRIBUTE_V4_OUT]); | |
3266 | if (alist) | |
3267 | ri->list[RIP_FILTER_OUT] = alist; | |
3268 | else | |
3269 | ri->list[RIP_FILTER_OUT] = NULL; | |
3270 | } else | |
3271 | ri->list[RIP_FILTER_OUT] = NULL; | |
3272 | ||
3273 | if (dist->prefix[DISTRIBUTE_V4_IN]) { | |
3274 | plist = prefix_list_lookup(AFI_IP, | |
3275 | dist->prefix[DISTRIBUTE_V4_IN]); | |
3276 | if (plist) | |
3277 | ri->prefix[RIP_FILTER_IN] = plist; | |
3278 | else | |
3279 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3280 | } else | |
3281 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3282 | ||
3283 | if (dist->prefix[DISTRIBUTE_V4_OUT]) { | |
3284 | plist = prefix_list_lookup(AFI_IP, | |
3285 | dist->prefix[DISTRIBUTE_V4_OUT]); | |
3286 | if (plist) | |
3287 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3288 | else | |
3289 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3290 | } else | |
3291 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3292 | } | |
3293 | ||
3294 | void rip_distribute_update_interface(struct interface *ifp) | |
3295 | { | |
045c5389 RW |
3296 | struct rip_interface *ri = ifp->info; |
3297 | struct rip *rip = ri->rip; | |
d62a17ae | 3298 | struct distribute *dist; |
3299 | ||
03a38493 PG |
3300 | if (!rip) |
3301 | return; | |
3302 | dist = distribute_lookup(rip->distribute_ctx, ifp->name); | |
d62a17ae | 3303 | if (dist) |
03a38493 | 3304 | rip_distribute_update(rip->distribute_ctx, dist); |
718e3744 | 3305 | } |
3306 | ||
3307 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3308 | /* ARGSUSED */ |
d62a17ae | 3309 | static void rip_distribute_update_all(struct prefix_list *notused) |
718e3744 | 3310 | { |
f4e14fdb | 3311 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 3312 | struct interface *ifp; |
718e3744 | 3313 | |
451fda4f | 3314 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3315 | rip_distribute_update_interface(ifp); |
718e3744 | 3316 | } |
11dde9c2 | 3317 | /* ARGSUSED */ |
d62a17ae | 3318 | static void rip_distribute_update_all_wrapper(struct access_list *notused) |
11dde9c2 | 3319 | { |
d62a17ae | 3320 | rip_distribute_update_all(NULL); |
11dde9c2 | 3321 | } |
6b0655a2 | 3322 | |
718e3744 | 3323 | /* Delete all added rip route. */ |
045c5389 | 3324 | void rip_clean(struct rip *rip) |
718e3744 | 3325 | { |
045c5389 RW |
3326 | struct vrf *vrf; |
3327 | struct interface *ifp; | |
d62a17ae | 3328 | struct route_node *rp; |
d62a17ae | 3329 | |
2d2eaa13 RW |
3330 | /* Clear RIP routes */ |
3331 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { | |
3332 | struct rip_info *rinfo; | |
3333 | struct list *list; | |
3334 | struct listnode *listnode; | |
d62a17ae | 3335 | |
2d2eaa13 RW |
3336 | if ((list = rp->info) == NULL) |
3337 | continue; | |
d62a17ae | 3338 | |
2d2eaa13 RW |
3339 | rinfo = listgetdata(listhead(list)); |
3340 | if (rip_route_rte(rinfo)) | |
045c5389 | 3341 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 3342 | |
2d2eaa13 RW |
3343 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { |
3344 | RIP_TIMER_OFF(rinfo->t_timeout); | |
3345 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
3346 | rip_info_free(rinfo); | |
d62a17ae | 3347 | } |
2d2eaa13 RW |
3348 | list_delete(&list); |
3349 | rp->info = NULL; | |
3350 | route_unlock_node(rp); | |
3351 | } | |
718e3744 | 3352 | |
2d2eaa13 RW |
3353 | /* Cancel RIP related timers. */ |
3354 | RIP_TIMER_OFF(rip->t_update); | |
3355 | RIP_TIMER_OFF(rip->t_triggered_update); | |
3356 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
d62a17ae | 3357 | |
2d2eaa13 RW |
3358 | /* Cancel read thread. */ |
3359 | THREAD_READ_OFF(rip->t_read); | |
d62a17ae | 3360 | |
2d2eaa13 RW |
3361 | /* Close RIP socket. */ |
3362 | if (rip->sock >= 0) { | |
3363 | close(rip->sock); | |
3364 | rip->sock = -1; | |
3365 | } | |
d62a17ae | 3366 | |
2d2eaa13 | 3367 | stream_free(rip->obuf); |
d62a17ae | 3368 | |
2d2eaa13 RW |
3369 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) |
3370 | if (rip->route_map[i].name) | |
3371 | free(rip->route_map[i].name); | |
3372 | ||
3373 | route_table_finish(rip->table); | |
3374 | route_table_finish(rip->neighbor); | |
711915d2 | 3375 | list_delete(&rip->peer_list); |
2d2eaa13 | 3376 | distribute_list_delete(&rip->distribute_ctx); |
d62a17ae | 3377 | |
045c5389 RW |
3378 | rip_clean_network(rip); |
3379 | rip_passive_nondefault_clean(rip); | |
ca046902 | 3380 | vector_free(rip->enable_interface); |
1205fdc4 | 3381 | route_table_finish(rip->enable_network); |
5a29c0d5 | 3382 | vector_free(rip->passive_nondefault); |
3f21c8c4 | 3383 | list_delete(&rip->offset_list_master); |
045c5389 | 3384 | rip_interfaces_clean(rip); |
2826309c | 3385 | route_table_finish(rip->distance_table); |
045c5389 RW |
3386 | rip_redistribute_clean(rip); |
3387 | ||
3388 | vrf = vrf_lookup_by_id(rip->vrf_id); | |
3389 | vrf->info = NULL; | |
3390 | ||
3391 | FOR_ALL_INTERFACES (vrf, ifp) { | |
3392 | struct rip_interface *ri; | |
3393 | ||
3394 | ri = ifp->info; | |
3395 | ri->rip = NULL; | |
3396 | } | |
2d2eaa13 RW |
3397 | |
3398 | XFREE(MTYPE_RIP, rip); | |
718e3744 | 3399 | } |
3400 | ||
d62a17ae | 3401 | static void rip_if_rmap_update(struct if_rmap *if_rmap) |
16705130 | 3402 | { |
d62a17ae | 3403 | struct interface *ifp; |
3404 | struct rip_interface *ri; | |
3405 | struct route_map *rmap; | |
16705130 | 3406 | |
d62a17ae | 3407 | ifp = if_lookup_by_name(if_rmap->ifname, VRF_DEFAULT); |
3408 | if (ifp == NULL) | |
3409 | return; | |
16705130 | 3410 | |
d62a17ae | 3411 | ri = ifp->info; |
d62a17ae | 3412 | if (if_rmap->routemap[IF_RMAP_IN]) { |
3413 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
3414 | if (rmap) | |
3415 | ri->routemap[IF_RMAP_IN] = rmap; | |
3416 | else | |
3417 | ri->routemap[IF_RMAP_IN] = NULL; | |
3418 | } else | |
3419 | ri->routemap[RIP_FILTER_IN] = NULL; | |
16705130 | 3420 | |
d62a17ae | 3421 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
3422 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
3423 | if (rmap) | |
3424 | ri->routemap[IF_RMAP_OUT] = rmap; | |
3425 | else | |
3426 | ri->routemap[IF_RMAP_OUT] = NULL; | |
3427 | } else | |
3428 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
16705130 | 3429 | } |
3430 | ||
d62a17ae | 3431 | void rip_if_rmap_update_interface(struct interface *ifp) |
16705130 | 3432 | { |
d62a17ae | 3433 | struct if_rmap *if_rmap; |
16705130 | 3434 | |
d62a17ae | 3435 | if_rmap = if_rmap_lookup(ifp->name); |
3436 | if (if_rmap) | |
3437 | rip_if_rmap_update(if_rmap); | |
16705130 | 3438 | } |
3439 | ||
045c5389 | 3440 | static void rip_routemap_update_redistribute(struct rip *rip) |
16705130 | 3441 | { |
045c5389 RW |
3442 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
3443 | if (rip->route_map[i].name) | |
3444 | rip->route_map[i].map = route_map_lookup_by_name( | |
3445 | rip->route_map[i].name); | |
16705130 | 3446 | } |
16705130 | 3447 | } |
3448 | ||
11dde9c2 | 3449 | /* ARGSUSED */ |
d62a17ae | 3450 | static void rip_routemap_update(const char *notused) |
16705130 | 3451 | { |
f4e14fdb | 3452 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
045c5389 | 3453 | struct rip *rip; |
d62a17ae | 3454 | struct interface *ifp; |
16705130 | 3455 | |
451fda4f | 3456 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3457 | rip_if_rmap_update_interface(ifp); |
16705130 | 3458 | |
045c5389 RW |
3459 | rip = vrf->info; |
3460 | if (rip) | |
3461 | rip_routemap_update_redistribute(rip); | |
16705130 | 3462 | } |
3463 | ||
718e3744 | 3464 | /* Allocate new rip structure and set default value. */ |
d62a17ae | 3465 | void rip_init(void) |
3466 | { | |
3467 | /* Install top nodes. */ | |
3468 | install_node(&rip_node, config_write_rip); | |
3469 | ||
3470 | /* Install rip commands. */ | |
3471 | install_element(VIEW_NODE, &show_ip_rip_cmd); | |
3472 | install_element(VIEW_NODE, &show_ip_rip_status_cmd); | |
d62a17ae | 3473 | |
3474 | install_default(RIP_NODE); | |
d62a17ae | 3475 | |
3476 | /* Debug related init. */ | |
3477 | rip_debug_init(); | |
3478 | ||
3479 | /* Access list install. */ | |
3480 | access_list_init(); | |
3481 | access_list_add_hook(rip_distribute_update_all_wrapper); | |
3482 | access_list_delete_hook(rip_distribute_update_all_wrapper); | |
3483 | ||
3484 | /* Prefix list initialize.*/ | |
3485 | prefix_list_init(); | |
3486 | prefix_list_add_hook(rip_distribute_update_all); | |
3487 | prefix_list_delete_hook(rip_distribute_update_all); | |
3488 | ||
3489 | /* Distribute list install. */ | |
3490 | distribute_list_init(RIP_NODE); | |
d62a17ae | 3491 | |
3492 | /* Route-map */ | |
3493 | rip_route_map_init(); | |
d62a17ae | 3494 | |
3495 | route_map_add_hook(rip_routemap_update); | |
3496 | route_map_delete_hook(rip_routemap_update); | |
3497 | ||
3498 | if_rmap_init(RIP_NODE); | |
3499 | if_rmap_hook_add(rip_if_rmap_update); | |
3500 | if_rmap_hook_delete(rip_if_rmap_update); | |
718e3744 | 3501 | } |