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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 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
b2d7c082 | 25 | #include "vrf.h" |
718e3744 | 26 | #include "if.h" |
27 | #include "command.h" | |
28 | #include "prefix.h" | |
29 | #include "table.h" | |
30 | #include "thread.h" | |
31 | #include "memory.h" | |
32 | #include "log.h" | |
33 | #include "stream.h" | |
34 | #include "filter.h" | |
35 | #include "sockunion.h" | |
1af81933 | 36 | #include "sockopt.h" |
718e3744 | 37 | #include "routemap.h" |
16705130 | 38 | #include "if_rmap.h" |
718e3744 | 39 | #include "plist.h" |
40 | #include "distribute.h" | |
c1a03d47 | 41 | #include "md5.h" |
718e3744 | 42 | #include "keychain.h" |
edd7c245 | 43 | #include "privs.h" |
718e3744 | 44 | |
45 | #include "ripd/ripd.h" | |
46 | #include "ripd/rip_debug.h" | |
47 | ||
0b3acf4f | 48 | /* UDP receive buffer size */ |
49 | #define RIP_UDP_RCV_BUF 41600 | |
50 | ||
51 | /* privileges global */ | |
edd7c245 | 52 | extern struct zebra_privs_t ripd_privs; |
53 | ||
718e3744 | 54 | /* RIP Structure. */ |
55 | struct rip *rip = NULL; | |
56 | ||
57 | /* RIP neighbor address table. */ | |
58 | struct route_table *rip_neighbor_table; | |
59 | ||
60 | /* RIP route changes. */ | |
61 | long rip_global_route_changes = 0; | |
62 | ||
63 | /* RIP queries. */ | |
64 | long rip_global_queries = 0; | |
6b0655a2 | 65 | |
718e3744 | 66 | /* Prototypes. */ |
dc63bfd4 | 67 | static void rip_event (enum rip_event, int); |
68 | static void rip_output_process (struct connected *, struct sockaddr_in *, int, u_char); | |
69 | static int rip_triggered_update (struct thread *); | |
70 | static int rip_update_jitter (unsigned long); | |
6b0655a2 | 71 | |
718e3744 | 72 | /* RIP output routes type. */ |
73 | enum | |
74 | { | |
75 | rip_all_route, | |
76 | rip_changed_route | |
77 | }; | |
6b0655a2 | 78 | |
718e3744 | 79 | /* RIP command strings. */ |
1423c809 | 80 | static const struct message rip_msg[] = |
718e3744 | 81 | { |
82 | {RIP_REQUEST, "REQUEST"}, | |
83 | {RIP_RESPONSE, "RESPONSE"}, | |
84 | {RIP_TRACEON, "TRACEON"}, | |
85 | {RIP_TRACEOFF, "TRACEOFF"}, | |
86 | {RIP_POLL, "POLL"}, | |
87 | {RIP_POLL_ENTRY, "POLL ENTRY"}, | |
1423c809 | 88 | {0, NULL}, |
718e3744 | 89 | }; |
6b0655a2 | 90 | |
718e3744 | 91 | /* Utility function to set boradcast option to the socket. */ |
dc63bfd4 | 92 | static int |
718e3744 | 93 | sockopt_broadcast (int sock) |
94 | { | |
95 | int ret; | |
96 | int on = 1; | |
97 | ||
98 | ret = setsockopt (sock, SOL_SOCKET, SO_BROADCAST, (char *) &on, sizeof on); | |
99 | if (ret < 0) | |
100 | { | |
101 | zlog_warn ("can't set sockopt SO_BROADCAST to socket %d", sock); | |
102 | return -1; | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
dc63bfd4 | 107 | static int |
718e3744 | 108 | rip_route_rte (struct rip_info *rinfo) |
109 | { | |
110 | return (rinfo->type == ZEBRA_ROUTE_RIP && rinfo->sub_type == RIP_ROUTE_RTE); | |
111 | } | |
112 | ||
dc63bfd4 | 113 | static struct rip_info * |
393deb9b | 114 | rip_info_new (void) |
718e3744 | 115 | { |
393deb9b | 116 | return XCALLOC (MTYPE_RIP_INFO, sizeof (struct rip_info)); |
718e3744 | 117 | } |
118 | ||
119 | void | |
120 | rip_info_free (struct rip_info *rinfo) | |
121 | { | |
122 | XFREE (MTYPE_RIP_INFO, rinfo); | |
123 | } | |
124 | ||
125 | /* RIP route garbage collect timer. */ | |
dc63bfd4 | 126 | static int |
718e3744 | 127 | rip_garbage_collect (struct thread *t) |
128 | { | |
129 | struct rip_info *rinfo; | |
130 | struct route_node *rp; | |
131 | ||
132 | rinfo = THREAD_ARG (t); | |
133 | rinfo->t_garbage_collect = NULL; | |
134 | ||
135 | /* Off timeout timer. */ | |
136 | RIP_TIMER_OFF (rinfo->t_timeout); | |
137 | ||
138 | /* Get route_node pointer. */ | |
139 | rp = rinfo->rp; | |
140 | ||
141 | /* Unlock route_node. */ | |
bce8e868 LF |
142 | listnode_delete (rp->info, rinfo); |
143 | if (list_isempty ((struct list *)rp->info)) | |
144 | { | |
145 | list_free (rp->info); | |
146 | rp->info = NULL; | |
147 | route_unlock_node (rp); | |
148 | } | |
718e3744 | 149 | |
150 | /* Free RIP routing information. */ | |
151 | rip_info_free (rinfo); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
bce8e868 LF |
156 | static void rip_timeout_update (struct rip_info *rinfo); |
157 | ||
158 | /* Add new route to the ECMP list. | |
8478ae7e LF |
159 | * RETURN: the new entry added in the list, or NULL if it is not the first |
160 | * entry and ECMP is not allowed. | |
bce8e868 LF |
161 | */ |
162 | struct rip_info * | |
163 | rip_ecmp_add (struct rip_info *rinfo_new) | |
718e3744 | 164 | { |
bce8e868 LF |
165 | struct route_node *rp = rinfo_new->rp; |
166 | struct rip_info *rinfo = NULL; | |
167 | struct list *list = NULL; | |
718e3744 | 168 | |
bce8e868 LF |
169 | if (rp->info == NULL) |
170 | rp->info = list_new (); | |
171 | list = (struct list *)rp->info; | |
172 | ||
8478ae7e LF |
173 | /* If ECMP is not allowed and some entry already exists in the list, |
174 | * do nothing. */ | |
175 | if (listcount (list) && !rip->ecmp) | |
176 | return NULL; | |
177 | ||
bce8e868 LF |
178 | rinfo = rip_info_new (); |
179 | memcpy (rinfo, rinfo_new, sizeof (struct rip_info)); | |
180 | listnode_add (list, rinfo); | |
181 | ||
182 | if (rip_route_rte (rinfo)) | |
183 | { | |
184 | rip_timeout_update (rinfo); | |
185 | rip_zebra_ipv4_add (rp); | |
186 | } | |
187 | ||
188 | /* Set the route change flag on the first entry. */ | |
189 | rinfo = listgetdata (listhead (list)); | |
190 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
191 | ||
192 | /* Signal the output process to trigger an update (see section 2.5). */ | |
193 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
718e3744 | 194 | |
bce8e868 LF |
195 | return rinfo; |
196 | } | |
197 | ||
198 | /* Replace the ECMP list with the new route. | |
199 | * RETURN: the new entry added in the list | |
200 | */ | |
201 | struct rip_info * | |
202 | rip_ecmp_replace (struct rip_info *rinfo_new) | |
203 | { | |
204 | struct route_node *rp = rinfo_new->rp; | |
205 | struct list *list = (struct list *)rp->info; | |
206 | struct rip_info *rinfo = NULL, *tmp_rinfo = NULL; | |
207 | struct listnode *node = NULL, *nextnode = NULL; | |
208 | ||
209 | if (list == NULL || listcount (list) == 0) | |
210 | return rip_ecmp_add (rinfo_new); | |
211 | ||
212 | /* Get the first entry */ | |
213 | rinfo = listgetdata (listhead (list)); | |
214 | ||
215 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
216 | if (rip_route_rte (rinfo) && !rip_route_rte (rinfo_new)) | |
217 | if (CHECK_FLAG (rinfo->flags, RIP_RTF_FIB)) | |
218 | rip_zebra_ipv4_delete (rp); | |
219 | ||
220 | /* Re-use the first entry, and delete the others. */ | |
221 | for (ALL_LIST_ELEMENTS (list, node, nextnode, tmp_rinfo)) | |
222 | if (tmp_rinfo != rinfo) | |
223 | { | |
224 | RIP_TIMER_OFF (tmp_rinfo->t_timeout); | |
225 | RIP_TIMER_OFF (tmp_rinfo->t_garbage_collect); | |
226 | list_delete_node (list, node); | |
227 | rip_info_free (tmp_rinfo); | |
228 | } | |
718e3744 | 229 | |
bce8e868 LF |
230 | RIP_TIMER_OFF (rinfo->t_timeout); |
231 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
232 | memcpy (rinfo, rinfo_new, sizeof (struct rip_info)); | |
718e3744 | 233 | |
bce8e868 LF |
234 | if (rip_route_rte (rinfo)) |
235 | { | |
236 | rip_timeout_update (rinfo); | |
237 | /* The ADD message implies an update. */ | |
238 | rip_zebra_ipv4_add (rp); | |
239 | } | |
718e3744 | 240 | |
bce8e868 LF |
241 | /* Set the route change flag. */ |
242 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
718e3744 | 243 | |
bce8e868 | 244 | /* Signal the output process to trigger an update (see section 2.5). */ |
718e3744 | 245 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
246 | ||
bce8e868 LF |
247 | return rinfo; |
248 | } | |
249 | ||
250 | /* Delete one route from the ECMP list. | |
251 | * RETURN: | |
252 | * null - the entry is freed, and other entries exist in the list | |
253 | * the entry - the entry is the last one in the list; its metric is set | |
254 | * to INFINITY, and the garbage collector is started for it | |
255 | */ | |
256 | struct rip_info * | |
257 | rip_ecmp_delete (struct rip_info *rinfo) | |
258 | { | |
259 | struct route_node *rp = rinfo->rp; | |
260 | struct list *list = (struct list *)rp->info; | |
261 | ||
262 | RIP_TIMER_OFF (rinfo->t_timeout); | |
263 | ||
264 | if (listcount (list) > 1) | |
265 | { | |
266 | /* Some other ECMP entries still exist. Just delete this entry. */ | |
267 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
268 | listnode_delete (list, rinfo); | |
269 | if (rip_route_rte (rinfo) && CHECK_FLAG (rinfo->flags, RIP_RTF_FIB)) | |
270 | /* The ADD message implies the update. */ | |
271 | rip_zebra_ipv4_add (rp); | |
272 | rip_info_free (rinfo); | |
273 | rinfo = NULL; | |
274 | } | |
275 | else | |
276 | { | |
277 | assert (rinfo == listgetdata (listhead (list))); | |
278 | ||
279 | /* This is the only entry left in the list. We must keep it in | |
280 | * the list for garbage collection time, with INFINITY metric. */ | |
281 | ||
282 | rinfo->metric = RIP_METRIC_INFINITY; | |
283 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
284 | rip_garbage_collect, rip->garbage_time); | |
285 | ||
286 | if (rip_route_rte (rinfo) && CHECK_FLAG (rinfo->flags, RIP_RTF_FIB)) | |
287 | rip_zebra_ipv4_delete (rp); | |
288 | } | |
289 | ||
290 | /* Set the route change flag on the first entry. */ | |
291 | rinfo = listgetdata (listhead (list)); | |
292 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
293 | ||
294 | /* Signal the output process to trigger an update (see section 2.5). */ | |
295 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
296 | ||
297 | return rinfo; | |
298 | } | |
299 | ||
300 | /* Timeout RIP routes. */ | |
301 | static int | |
302 | rip_timeout (struct thread *t) | |
303 | { | |
304 | rip_ecmp_delete ((struct rip_info *)THREAD_ARG (t)); | |
718e3744 | 305 | return 0; |
306 | } | |
307 | ||
dc63bfd4 | 308 | static void |
718e3744 | 309 | rip_timeout_update (struct rip_info *rinfo) |
310 | { | |
311 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
312 | { | |
313 | RIP_TIMER_OFF (rinfo->t_timeout); | |
314 | RIP_TIMER_ON (rinfo->t_timeout, rip_timeout, rip->timeout_time); | |
315 | } | |
316 | } | |
317 | ||
dc63bfd4 | 318 | static int |
718e3744 | 319 | rip_incoming_filter (struct prefix_ipv4 *p, struct rip_interface *ri) |
320 | { | |
321 | struct distribute *dist; | |
322 | struct access_list *alist; | |
323 | struct prefix_list *plist; | |
324 | ||
325 | /* Input distribute-list filtering. */ | |
326 | if (ri->list[RIP_FILTER_IN]) | |
327 | { | |
328 | if (access_list_apply (ri->list[RIP_FILTER_IN], | |
329 | (struct prefix *) p) == FILTER_DENY) | |
330 | { | |
331 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 332 | zlog_debug ("%s/%d filtered by distribute in", |
718e3744 | 333 | inet_ntoa (p->prefix), p->prefixlen); |
334 | return -1; | |
335 | } | |
336 | } | |
337 | if (ri->prefix[RIP_FILTER_IN]) | |
338 | { | |
339 | if (prefix_list_apply (ri->prefix[RIP_FILTER_IN], | |
340 | (struct prefix *) p) == PREFIX_DENY) | |
341 | { | |
342 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 343 | zlog_debug ("%s/%d filtered by prefix-list in", |
718e3744 | 344 | inet_ntoa (p->prefix), p->prefixlen); |
345 | return -1; | |
346 | } | |
347 | } | |
348 | ||
349 | /* All interface filter check. */ | |
350 | dist = distribute_lookup (NULL); | |
351 | if (dist) | |
352 | { | |
353 | if (dist->list[DISTRIBUTE_IN]) | |
354 | { | |
355 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]); | |
356 | ||
357 | if (alist) | |
358 | { | |
359 | if (access_list_apply (alist, | |
360 | (struct prefix *) p) == FILTER_DENY) | |
361 | { | |
362 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 363 | zlog_debug ("%s/%d filtered by distribute in", |
718e3744 | 364 | inet_ntoa (p->prefix), p->prefixlen); |
365 | return -1; | |
366 | } | |
367 | } | |
368 | } | |
369 | if (dist->prefix[DISTRIBUTE_IN]) | |
370 | { | |
371 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]); | |
372 | ||
373 | if (plist) | |
374 | { | |
375 | if (prefix_list_apply (plist, | |
376 | (struct prefix *) p) == PREFIX_DENY) | |
377 | { | |
378 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 379 | zlog_debug ("%s/%d filtered by prefix-list in", |
718e3744 | 380 | inet_ntoa (p->prefix), p->prefixlen); |
381 | return -1; | |
382 | } | |
383 | } | |
384 | } | |
385 | } | |
386 | return 0; | |
387 | } | |
388 | ||
dc63bfd4 | 389 | static int |
718e3744 | 390 | rip_outgoing_filter (struct prefix_ipv4 *p, struct rip_interface *ri) |
391 | { | |
392 | struct distribute *dist; | |
393 | struct access_list *alist; | |
394 | struct prefix_list *plist; | |
395 | ||
396 | if (ri->list[RIP_FILTER_OUT]) | |
397 | { | |
398 | if (access_list_apply (ri->list[RIP_FILTER_OUT], | |
399 | (struct prefix *) p) == FILTER_DENY) | |
400 | { | |
401 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 402 | zlog_debug ("%s/%d is filtered by distribute out", |
718e3744 | 403 | inet_ntoa (p->prefix), p->prefixlen); |
404 | return -1; | |
405 | } | |
406 | } | |
407 | if (ri->prefix[RIP_FILTER_OUT]) | |
408 | { | |
409 | if (prefix_list_apply (ri->prefix[RIP_FILTER_OUT], | |
410 | (struct prefix *) p) == PREFIX_DENY) | |
411 | { | |
412 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 413 | zlog_debug ("%s/%d is filtered by prefix-list out", |
718e3744 | 414 | inet_ntoa (p->prefix), p->prefixlen); |
415 | return -1; | |
416 | } | |
417 | } | |
418 | ||
419 | /* All interface filter check. */ | |
420 | dist = distribute_lookup (NULL); | |
421 | if (dist) | |
422 | { | |
423 | if (dist->list[DISTRIBUTE_OUT]) | |
424 | { | |
425 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]); | |
426 | ||
427 | if (alist) | |
428 | { | |
429 | if (access_list_apply (alist, | |
430 | (struct prefix *) p) == FILTER_DENY) | |
431 | { | |
432 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 433 | zlog_debug ("%s/%d filtered by distribute out", |
718e3744 | 434 | inet_ntoa (p->prefix), p->prefixlen); |
435 | return -1; | |
436 | } | |
437 | } | |
438 | } | |
439 | if (dist->prefix[DISTRIBUTE_OUT]) | |
440 | { | |
441 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]); | |
442 | ||
443 | if (plist) | |
444 | { | |
445 | if (prefix_list_apply (plist, | |
446 | (struct prefix *) p) == PREFIX_DENY) | |
447 | { | |
448 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 449 | zlog_debug ("%s/%d filtered by prefix-list out", |
718e3744 | 450 | inet_ntoa (p->prefix), p->prefixlen); |
451 | return -1; | |
452 | } | |
453 | } | |
454 | } | |
455 | } | |
456 | return 0; | |
457 | } | |
458 | ||
459 | /* Check nexthop address validity. */ | |
460 | static int | |
461 | rip_nexthop_check (struct in_addr *addr) | |
462 | { | |
52dc7ee6 | 463 | struct listnode *node; |
464 | struct listnode *cnode; | |
718e3744 | 465 | struct interface *ifp; |
466 | struct connected *ifc; | |
467 | struct prefix *p; | |
468 | ||
469 | /* If nexthop address matches local configured address then it is | |
470 | invalid nexthop. */ | |
b2d7c082 DS |
471 | |
472 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) | |
718e3744 | 473 | { |
1eb8ef25 | 474 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, ifc)) |
718e3744 | 475 | { |
718e3744 | 476 | p = ifc->address; |
477 | ||
478 | if (p->family == AF_INET | |
479 | && IPV4_ADDR_SAME (&p->u.prefix4, addr)) | |
480 | return -1; | |
481 | } | |
482 | } | |
483 | return 0; | |
484 | } | |
485 | ||
486 | /* RIP add route to routing table. */ | |
dc63bfd4 | 487 | static void |
718e3744 | 488 | rip_rte_process (struct rte *rte, struct sockaddr_in *from, |
a87552cd | 489 | struct interface *ifp) |
718e3744 | 490 | { |
491 | int ret; | |
492 | struct prefix_ipv4 p; | |
493 | struct route_node *rp; | |
bce8e868 | 494 | struct rip_info *rinfo = NULL, newinfo; |
718e3744 | 495 | struct rip_interface *ri; |
496 | struct in_addr *nexthop; | |
718e3744 | 497 | int same = 0; |
fbf5d033 | 498 | unsigned char old_dist, new_dist; |
bce8e868 LF |
499 | struct list *list = NULL; |
500 | struct listnode *node = NULL; | |
718e3744 | 501 | |
502 | /* Make prefix structure. */ | |
503 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
504 | p.family = AF_INET; | |
505 | p.prefix = rte->prefix; | |
506 | p.prefixlen = ip_masklen (rte->mask); | |
507 | ||
508 | /* Make sure mask is applied. */ | |
509 | apply_mask_ipv4 (&p); | |
510 | ||
511 | /* Apply input filters. */ | |
512 | ri = ifp->info; | |
513 | ||
514 | ret = rip_incoming_filter (&p, ri); | |
515 | if (ret < 0) | |
516 | return; | |
517 | ||
bce8e868 LF |
518 | memset (&newinfo, 0, sizeof (newinfo)); |
519 | newinfo.type = ZEBRA_ROUTE_RIP; | |
520 | newinfo.sub_type = RIP_ROUTE_RTE; | |
521 | newinfo.nexthop = rte->nexthop; | |
522 | newinfo.from = from->sin_addr; | |
523 | newinfo.ifindex = ifp->ifindex; | |
524 | newinfo.metric = rte->metric; | |
525 | newinfo.metric_out = rte->metric; /* XXX */ | |
526 | newinfo.tag = ntohs (rte->tag); /* XXX */ | |
527 | ||
16705130 | 528 | /* Modify entry according to the interface routemap. */ |
529 | if (ri->routemap[RIP_FILTER_IN]) | |
530 | { | |
531 | int ret; | |
16705130 | 532 | |
533 | /* The object should be of the type of rip_info */ | |
a87552cd | 534 | ret = route_map_apply (ri->routemap[RIP_FILTER_IN], |
535 | (struct prefix *) &p, RMAP_RIP, &newinfo); | |
16705130 | 536 | |
537 | if (ret == RMAP_DENYMATCH) | |
a87552cd | 538 | { |
539 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 540 | zlog_debug ("RIP %s/%d is filtered by route-map in", |
a87552cd | 541 | inet_ntoa (p.prefix), p.prefixlen); |
542 | return; | |
543 | } | |
16705130 | 544 | |
545 | /* Get back the object */ | |
a87552cd | 546 | rte->nexthop = newinfo.nexthop_out; |
547 | rte->tag = htons (newinfo.tag_out); /* XXX */ | |
548 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the metric_out field */ | |
16705130 | 549 | } |
550 | ||
718e3744 | 551 | /* Once the entry has been validated, update the metric by |
552 | adding the cost of the network on wich the message | |
553 | arrived. If the result is greater than infinity, use infinity | |
554 | (RFC2453 Sec. 3.9.2) */ | |
555 | /* Zebra ripd can handle offset-list in. */ | |
556 | ret = rip_offset_list_apply_in (&p, ifp, &rte->metric); | |
557 | ||
558 | /* If offset-list does not modify the metric use interface's | |
559 | metric. */ | |
a87552cd | 560 | if (!ret) |
7b3b98ae | 561 | rte->metric += ifp->metric ? ifp->metric : 1; |
718e3744 | 562 | |
563 | if (rte->metric > RIP_METRIC_INFINITY) | |
564 | rte->metric = RIP_METRIC_INFINITY; | |
565 | ||
566 | /* Set nexthop pointer. */ | |
567 | if (rte->nexthop.s_addr == 0) | |
568 | nexthop = &from->sin_addr; | |
569 | else | |
570 | nexthop = &rte->nexthop; | |
571 | ||
16705130 | 572 | /* Check if nexthop address is myself, then do nothing. */ |
718e3744 | 573 | if (rip_nexthop_check (nexthop) < 0) |
574 | { | |
575 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 576 | zlog_debug ("Nexthop address %s is myself", inet_ntoa (*nexthop)); |
718e3744 | 577 | return; |
578 | } | |
579 | ||
580 | /* Get index for the prefix. */ | |
581 | rp = route_node_get (rip->table, (struct prefix *) &p); | |
582 | ||
bce8e868 LF |
583 | newinfo.rp = rp; |
584 | newinfo.nexthop = *nexthop; | |
585 | newinfo.metric = rte->metric; | |
586 | newinfo.tag = ntohs (rte->tag); | |
587 | newinfo.distance = rip_distance_apply (&newinfo); | |
588 | ||
589 | new_dist = newinfo.distance ? newinfo.distance : ZEBRA_RIP_DISTANCE_DEFAULT; | |
590 | ||
718e3744 | 591 | /* Check to see whether there is already RIP route on the table. */ |
bce8e868 LF |
592 | if ((list = rp->info) != NULL) |
593 | for (ALL_LIST_ELEMENTS_RO (list, node, rinfo)) | |
594 | { | |
595 | /* Need to compare with redistributed entry or local entry */ | |
596 | if (!rip_route_rte (rinfo)) | |
597 | break; | |
598 | ||
599 | if (IPV4_ADDR_SAME (&rinfo->from, &from->sin_addr) && | |
600 | IPV4_ADDR_SAME (&rinfo->nexthop, nexthop)) | |
601 | break; | |
602 | ||
603 | if (!listnextnode (node)) | |
604 | { | |
605 | /* Not found in the list */ | |
606 | ||
607 | if (rte->metric > rinfo->metric) | |
608 | { | |
609 | /* New route has a greater metric. Discard it. */ | |
610 | route_unlock_node (rp); | |
611 | return; | |
612 | } | |
613 | ||
614 | if (rte->metric < rinfo->metric) | |
615 | /* New route has a smaller metric. Replace the ECMP list | |
616 | * with the new one in below. */ | |
617 | break; | |
618 | ||
619 | /* Metrics are same. We compare the distances. */ | |
620 | old_dist = rinfo->distance ? \ | |
621 | rinfo->distance : ZEBRA_RIP_DISTANCE_DEFAULT; | |
622 | ||
623 | if (new_dist > old_dist) | |
624 | { | |
625 | /* New route has a greater distance. Discard it. */ | |
626 | route_unlock_node (rp); | |
627 | return; | |
628 | } | |
629 | ||
630 | if (new_dist < old_dist) | |
631 | /* New route has a smaller distance. Replace the ECMP list | |
632 | * with the new one in below. */ | |
633 | break; | |
634 | ||
635 | /* Metrics and distances are both same. Keep "rinfo" null and | |
636 | * the new route is added in the ECMP list in below. */ | |
637 | } | |
638 | } | |
718e3744 | 639 | |
640 | if (rinfo) | |
641 | { | |
718e3744 | 642 | /* Local static route. */ |
643 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
a87552cd | 644 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
645 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
646 | && rinfo->metric != RIP_METRIC_INFINITY) | |
fbf5d033 | 647 | { |
648 | route_unlock_node (rp); | |
649 | return; | |
650 | } | |
651 | ||
652 | /* Redistributed route check. */ | |
653 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
654 | && rinfo->metric != RIP_METRIC_INFINITY) | |
655 | { | |
fbf5d033 | 656 | old_dist = rinfo->distance; |
b68da446 DL |
657 | /* Only routes directly connected to an interface (nexthop == 0) |
658 | * may have a valid NULL distance */ | |
659 | if (rinfo->nexthop.s_addr != 0) | |
7a383339 | 660 | old_dist = old_dist ? old_dist : ZEBRA_RIP_DISTANCE_DEFAULT; |
fbf5d033 | 661 | /* If imported route does not have STRICT precedence, |
662 | mark it as a ghost */ | |
bce8e868 LF |
663 | if (new_dist <= old_dist && rte->metric != RIP_METRIC_INFINITY) |
664 | rip_ecmp_replace (&newinfo); | |
665 | ||
666 | route_unlock_node (rp); | |
667 | return; | |
fbf5d033 | 668 | } |
718e3744 | 669 | } |
a87552cd | 670 | |
671 | if (!rinfo) | |
718e3744 | 672 | { |
bce8e868 LF |
673 | if (rp->info) |
674 | route_unlock_node (rp); | |
675 | ||
718e3744 | 676 | /* Now, check to see whether there is already an explicit route |
a87552cd | 677 | for the destination prefix. If there is no such route, add |
678 | this route to the routing table, unless the metric is | |
679 | infinity (there is no point in adding a route which | |
680 | unusable). */ | |
718e3744 | 681 | if (rte->metric != RIP_METRIC_INFINITY) |
bce8e868 | 682 | rip_ecmp_add (&newinfo); |
718e3744 | 683 | } |
684 | else | |
685 | { | |
686 | /* Route is there but we are not sure the route is RIP or not. */ | |
a87552cd | 687 | |
718e3744 | 688 | /* If there is an existing route, compare the next hop address |
a87552cd | 689 | to the address of the router from which the datagram came. |
690 | If this datagram is from the same router as the existing | |
691 | route, reinitialize the timeout. */ | |
16705130 | 692 | same = (IPV4_ADDR_SAME (&rinfo->from, &from->sin_addr) |
a87552cd | 693 | && (rinfo->ifindex == ifp->ifindex)); |
718e3744 | 694 | |
bce8e868 LF |
695 | old_dist = rinfo->distance ? \ |
696 | rinfo->distance : ZEBRA_RIP_DISTANCE_DEFAULT; | |
b94f9dbd | 697 | |
718e3744 | 698 | /* Next, compare the metrics. If the datagram is from the same |
a87552cd | 699 | router as the existing route, and the new metric is different |
700 | than the old one; or, if the new metric is lower than the old | |
701 | one, or if the tag has been changed; or if there is a route | |
702 | with a lower administrave distance; or an update of the | |
703 | distance on the actual route; do the following actions: */ | |
704 | if ((same && rinfo->metric != rte->metric) | |
705 | || (rte->metric < rinfo->metric) | |
706 | || ((same) | |
707 | && (rinfo->metric == rte->metric) | |
bce8e868 LF |
708 | && (newinfo.tag != rinfo->tag)) |
709 | || (old_dist > new_dist) | |
710 | || ((old_dist != new_dist) && same)) | |
a87552cd | 711 | { |
bce8e868 | 712 | if (listcount (list) == 1) |
a87552cd | 713 | { |
bce8e868 LF |
714 | if (newinfo.metric != RIP_METRIC_INFINITY) |
715 | rip_ecmp_replace (&newinfo); | |
716 | else | |
717 | rip_ecmp_delete (rinfo); | |
a87552cd | 718 | } |
bce8e868 | 719 | else |
a87552cd | 720 | { |
bce8e868 LF |
721 | if (newinfo.metric < rinfo->metric) |
722 | rip_ecmp_replace (&newinfo); | |
723 | else if (newinfo.metric > rinfo->metric) | |
724 | rip_ecmp_delete (rinfo); | |
725 | else if (new_dist < old_dist) | |
726 | rip_ecmp_replace (&newinfo); | |
727 | else if (new_dist > old_dist) | |
728 | rip_ecmp_delete (rinfo); | |
729 | else | |
730 | { | |
731 | int update = CHECK_FLAG (rinfo->flags, RIP_RTF_FIB) ? 1 : 0; | |
a87552cd | 732 | |
bce8e868 | 733 | assert (newinfo.metric != RIP_METRIC_INFINITY); |
a87552cd | 734 | |
a87552cd | 735 | RIP_TIMER_OFF (rinfo->t_timeout); |
bce8e868 LF |
736 | RIP_TIMER_OFF (rinfo->t_garbage_collect); |
737 | memcpy (rinfo, &newinfo, sizeof (struct rip_info)); | |
738 | rip_timeout_update (rinfo); | |
739 | ||
740 | if (update) | |
741 | rip_zebra_ipv4_add (rp); | |
a87552cd | 742 | |
bce8e868 LF |
743 | /* - Set the route change flag on the first entry. */ |
744 | rinfo = listgetdata (listhead (list)); | |
745 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
746 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
a87552cd | 747 | } |
748 | } | |
a87552cd | 749 | } |
bce8e868 LF |
750 | else /* same & no change */ |
751 | rip_timeout_update (rinfo); | |
752 | ||
718e3744 | 753 | /* Unlock tempolary lock of the route. */ |
754 | route_unlock_node (rp); | |
755 | } | |
756 | } | |
757 | ||
758 | /* Dump RIP packet */ | |
dc63bfd4 | 759 | static void |
8a676be3 | 760 | rip_packet_dump (struct rip_packet *packet, int size, const char *sndrcv) |
718e3744 | 761 | { |
762 | caddr_t lim; | |
763 | struct rte *rte; | |
8a676be3 | 764 | const char *command_str; |
718e3744 | 765 | char pbuf[BUFSIZ], nbuf[BUFSIZ]; |
766 | u_char netmask = 0; | |
767 | u_char *p; | |
768 | ||
769 | /* Set command string. */ | |
770 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
771 | command_str = lookup (rip_msg, packet->command); | |
772 | else | |
773 | command_str = "unknown"; | |
774 | ||
775 | /* Dump packet header. */ | |
5d6c3779 | 776 | zlog_debug ("%s %s version %d packet size %d", |
718e3744 | 777 | sndrcv, command_str, packet->version, size); |
778 | ||
779 | /* Dump each routing table entry. */ | |
780 | rte = packet->rte; | |
781 | ||
782 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) | |
783 | { | |
784 | if (packet->version == RIPv2) | |
785 | { | |
786 | netmask = ip_masklen (rte->mask); | |
787 | ||
ca5e516c | 788 | if (rte->family == htons (RIP_FAMILY_AUTH)) |
718e3744 | 789 | { |
ca5e516c | 790 | if (rte->tag == htons (RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 791 | { |
792 | p = (u_char *)&rte->prefix; | |
793 | ||
5d6c3779 | 794 | zlog_debug (" family 0x%X type %d auth string: %s", |
718e3744 | 795 | ntohs (rte->family), ntohs (rte->tag), p); |
796 | } | |
ca5e516c | 797 | else if (rte->tag == htons (RIP_AUTH_MD5)) |
718e3744 | 798 | { |
799 | struct rip_md5_info *md5; | |
800 | ||
801 | md5 = (struct rip_md5_info *) &packet->rte; | |
802 | ||
5d6c3779 | 803 | zlog_debug (" family 0x%X type %d (MD5 authentication)", |
718e3744 | 804 | ntohs (md5->family), ntohs (md5->type)); |
5d6c3779 | 805 | zlog_debug (" RIP-2 packet len %d Key ID %d" |
ca5e516c | 806 | " Auth Data len %d", |
807 | ntohs (md5->packet_len), md5->keyid, | |
808 | md5->auth_len); | |
5d6c3779 | 809 | zlog_debug (" Sequence Number %ld", |
ca5e516c | 810 | (u_long) ntohl (md5->sequence)); |
718e3744 | 811 | } |
ca5e516c | 812 | else if (rte->tag == htons (RIP_AUTH_DATA)) |
718e3744 | 813 | { |
814 | p = (u_char *)&rte->prefix; | |
815 | ||
5d6c3779 | 816 | zlog_debug (" family 0x%X type %d (MD5 data)", |
718e3744 | 817 | ntohs (rte->family), ntohs (rte->tag)); |
5d6c3779 | 818 | zlog_debug (" MD5: %02X%02X%02X%02X%02X%02X%02X%02X" |
718e3744 | 819 | "%02X%02X%02X%02X%02X%02X%02X", |
ca5e516c | 820 | p[0], p[1], p[2], p[3], p[4], p[5], p[6], |
821 | p[7], p[9], p[10], p[11], p[12], p[13], | |
822 | p[14], p[15]); | |
718e3744 | 823 | } |
824 | else | |
825 | { | |
5d6c3779 | 826 | zlog_debug (" family 0x%X type %d (Unknown auth type)", |
718e3744 | 827 | ntohs (rte->family), ntohs (rte->tag)); |
828 | } | |
829 | } | |
830 | else | |
5d6c3779 | 831 | zlog_debug (" %s/%d -> %s family %d tag %d metric %ld", |
ca5e516c | 832 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
833 | netmask, inet_ntop (AF_INET, &rte->nexthop, nbuf, | |
834 | BUFSIZ), ntohs (rte->family), | |
835 | ntohs (rte->tag), (u_long) ntohl (rte->metric)); | |
718e3744 | 836 | } |
837 | else | |
838 | { | |
5d6c3779 | 839 | zlog_debug (" %s family %d tag %d metric %ld", |
718e3744 | 840 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
841 | ntohs (rte->family), ntohs (rte->tag), | |
842 | (u_long)ntohl (rte->metric)); | |
843 | } | |
844 | } | |
845 | } | |
846 | ||
847 | /* Check if the destination address is valid (unicast; not net 0 | |
848 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
849 | check net 0 because we accept default route. */ | |
dc63bfd4 | 850 | static int |
718e3744 | 851 | rip_destination_check (struct in_addr addr) |
852 | { | |
853 | u_int32_t destination; | |
854 | ||
855 | /* Convert to host byte order. */ | |
856 | destination = ntohl (addr.s_addr); | |
857 | ||
858 | if (IPV4_NET127 (destination)) | |
859 | return 0; | |
860 | ||
861 | /* Net 0 may match to the default route. */ | |
862 | if (IPV4_NET0 (destination) && destination != 0) | |
863 | return 0; | |
864 | ||
865 | /* Unicast address must belong to class A, B, C. */ | |
866 | if (IN_CLASSA (destination)) | |
867 | return 1; | |
868 | if (IN_CLASSB (destination)) | |
869 | return 1; | |
870 | if (IN_CLASSC (destination)) | |
871 | return 1; | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
876 | /* RIP version 2 authentication. */ | |
dc63bfd4 | 877 | static int |
718e3744 | 878 | rip_auth_simple_password (struct rte *rte, struct sockaddr_in *from, |
879 | struct interface *ifp) | |
880 | { | |
881 | struct rip_interface *ri; | |
882 | char *auth_str; | |
883 | ||
884 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 885 | zlog_debug ("RIPv2 simple password authentication from %s", |
718e3744 | 886 | inet_ntoa (from->sin_addr)); |
887 | ||
888 | ri = ifp->info; | |
889 | ||
890 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
ca5e516c | 891 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 892 | return 0; |
893 | ||
894 | /* Simple password authentication. */ | |
895 | if (ri->auth_str) | |
896 | { | |
897 | auth_str = (char *) &rte->prefix; | |
898 | ||
899 | if (strncmp (auth_str, ri->auth_str, 16) == 0) | |
900 | return 1; | |
901 | } | |
902 | if (ri->key_chain) | |
903 | { | |
904 | struct keychain *keychain; | |
905 | struct key *key; | |
906 | ||
907 | keychain = keychain_lookup (ri->key_chain); | |
908 | if (keychain == NULL) | |
909 | return 0; | |
910 | ||
911 | key = key_match_for_accept (keychain, (char *) &rte->prefix); | |
912 | if (key) | |
913 | return 1; | |
914 | } | |
915 | return 0; | |
916 | } | |
917 | ||
918 | /* RIP version 2 authentication with MD5. */ | |
dc63bfd4 | 919 | static int |
718e3744 | 920 | rip_auth_md5 (struct rip_packet *packet, struct sockaddr_in *from, |
ca5e516c | 921 | int length, struct interface *ifp) |
718e3744 | 922 | { |
923 | struct rip_interface *ri; | |
924 | struct rip_md5_info *md5; | |
925 | struct rip_md5_data *md5data; | |
926 | struct keychain *keychain; | |
927 | struct key *key; | |
c1a03d47 | 928 | MD5_CTX ctx; |
718e3744 | 929 | u_char digest[RIP_AUTH_MD5_SIZE]; |
930 | u_int16_t packet_len; | |
98fd1e61 | 931 | char auth_str[RIP_AUTH_MD5_SIZE]; |
718e3744 | 932 | |
933 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 934 | zlog_debug ("RIPv2 MD5 authentication from %s", |
ca5e516c | 935 | inet_ntoa (from->sin_addr)); |
718e3744 | 936 | |
937 | ri = ifp->info; | |
938 | md5 = (struct rip_md5_info *) &packet->rte; | |
939 | ||
940 | /* Check auth type. */ | |
ca5e516c | 941 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) |
718e3744 | 942 | return 0; |
943 | ||
ca5e516c | 944 | /* If the authentication length is less than 16, then it must be wrong for |
945 | * any interpretation of rfc2082. Some implementations also interpret | |
946 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka RIP_AUTH_MD5_COMPAT_SIZE. | |
98fd1e61 | 947 | */ |
ca5e516c | 948 | if ( !((md5->auth_len == RIP_AUTH_MD5_SIZE) |
949 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) | |
c2bfbcc3 | 950 | { |
951 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 952 | zlog_debug ("RIPv2 MD5 authentication, strange authentication " |
ca5e516c | 953 | "length field %d", md5->auth_len); |
718e3744 | 954 | return 0; |
c2bfbcc3 | 955 | } |
718e3744 | 956 | |
ca5e516c | 957 | /* grab and verify check packet length */ |
958 | packet_len = ntohs (md5->packet_len); | |
959 | ||
960 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) | |
961 | { | |
962 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 963 | zlog_debug ("RIPv2 MD5 authentication, packet length field %d " |
ca5e516c | 964 | "greater than received length %d!", |
965 | md5->packet_len, length); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | /* retrieve authentication data */ | |
970 | md5data = (struct rip_md5_data *) (((u_char *) packet) + packet_len); | |
98fd1e61 | 971 | |
972 | memset (auth_str, 0, RIP_AUTH_MD5_SIZE); | |
ca5e516c | 973 | |
718e3744 | 974 | if (ri->key_chain) |
975 | { | |
976 | keychain = keychain_lookup (ri->key_chain); | |
977 | if (keychain == NULL) | |
978 | return 0; | |
979 | ||
980 | key = key_lookup_for_accept (keychain, md5->keyid); | |
981 | if (key == NULL) | |
982 | return 0; | |
983 | ||
98fd1e61 | 984 | strncpy (auth_str, key->string, RIP_AUTH_MD5_SIZE); |
718e3744 | 985 | } |
98fd1e61 | 986 | else if (ri->auth_str) |
987 | strncpy (auth_str, ri->auth_str, RIP_AUTH_MD5_SIZE); | |
718e3744 | 988 | |
fa93b162 | 989 | if (auth_str[0] == 0) |
718e3744 | 990 | return 0; |
98fd1e61 | 991 | |
718e3744 | 992 | /* MD5 digest authentication. */ |
c1a03d47 | 993 | memset (&ctx, 0, sizeof(ctx)); |
994 | MD5Init(&ctx); | |
98fd1e61 | 995 | MD5Update(&ctx, packet, packet_len + RIP_HEADER_SIZE); |
996 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
c1a03d47 | 997 | MD5Final(digest, &ctx); |
98fd1e61 | 998 | |
999 | if (memcmp (md5data->digest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
718e3744 | 1000 | return packet_len; |
1001 | else | |
1002 | return 0; | |
1003 | } | |
1004 | ||
b14ee00b | 1005 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
1006 | * (left justified and padded). | |
1007 | * | |
1008 | * presumes one of ri or key is valid, and that the auth strings they point | |
1009 | * to are nul terminated. If neither are present, auth_str will be fully | |
1010 | * zero padded. | |
1011 | * | |
1012 | */ | |
1013 | static void | |
1014 | rip_auth_prepare_str_send (struct rip_interface *ri, struct key *key, | |
1015 | char *auth_str, int len) | |
718e3744 | 1016 | { |
b14ee00b | 1017 | assert (ri || key); |
718e3744 | 1018 | |
b14ee00b | 1019 | memset (auth_str, 0, len); |
1020 | if (key && key->string) | |
1021 | strncpy (auth_str, key->string, len); | |
1022 | else if (ri->auth_str) | |
1023 | strncpy (auth_str, ri->auth_str, len); | |
718e3744 | 1024 | |
b14ee00b | 1025 | return; |
1026 | } | |
718e3744 | 1027 | |
b14ee00b | 1028 | /* Write RIPv2 simple password authentication information |
1029 | * | |
1030 | * auth_str is presumed to be 2 bytes and correctly prepared | |
1031 | * (left justified and zero padded). | |
1032 | */ | |
1033 | static void | |
1034 | rip_auth_simple_write (struct stream *s, char *auth_str, int len) | |
1035 | { | |
1036 | assert (s && len == RIP_AUTH_SIMPLE_SIZE); | |
1037 | ||
1038 | stream_putw (s, RIP_FAMILY_AUTH); | |
1039 | stream_putw (s, RIP_AUTH_SIMPLE_PASSWORD); | |
1040 | stream_put (s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
1041 | ||
1042 | return; | |
1043 | } | |
718e3744 | 1044 | |
b14ee00b | 1045 | /* write RIPv2 MD5 "authentication header" |
1046 | * (uses the auth key data field) | |
1047 | * | |
1048 | * Digest offset field is set to 0. | |
1049 | * | |
1050 | * returns: offset of the digest offset field, which must be set when | |
1051 | * length to the auth-data MD5 digest is known. | |
1052 | */ | |
1053 | static size_t | |
1054 | rip_auth_md5_ah_write (struct stream *s, struct rip_interface *ri, | |
1055 | struct key *key) | |
1056 | { | |
98fd1e61 | 1057 | size_t doff = 0; |
718e3744 | 1058 | |
b14ee00b | 1059 | assert (s && ri && ri->auth_type == RIP_AUTH_MD5); |
718e3744 | 1060 | |
1061 | /* MD5 authentication. */ | |
ca5e516c | 1062 | stream_putw (s, RIP_FAMILY_AUTH); |
718e3744 | 1063 | stream_putw (s, RIP_AUTH_MD5); |
1064 | ||
b14ee00b | 1065 | /* MD5 AH digest offset field. |
1066 | * | |
1067 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
1068 | * is known. Actual value is set in .....(). | |
1069 | */ | |
98fd1e61 | 1070 | doff = stream_get_endp(s); |
b14ee00b | 1071 | stream_putw (s, 0); |
718e3744 | 1072 | |
1073 | /* Key ID. */ | |
1074 | if (key) | |
1075 | stream_putc (s, key->index % 256); | |
1076 | else | |
1077 | stream_putc (s, 1); | |
1078 | ||
ca5e516c | 1079 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds |
1080 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for this | |
1081 | * to be configurable. | |
1082 | */ | |
1083 | stream_putc (s, ri->md5_auth_len); | |
718e3744 | 1084 | |
1085 | /* Sequence Number (non-decreasing). */ | |
1086 | /* RFC2080: The value used in the sequence number is | |
1087 | arbitrary, but two suggestions are the time of the | |
1088 | message's creation or a simple message counter. */ | |
1089 | stream_putl (s, time (NULL)); | |
1090 | ||
1091 | /* Reserved field must be zero. */ | |
1092 | stream_putl (s, 0); | |
1093 | stream_putl (s, 0); | |
1094 | ||
98fd1e61 | 1095 | return doff; |
b14ee00b | 1096 | } |
1097 | ||
1098 | /* If authentication is in used, write the appropriate header | |
1099 | * returns stream offset to which length must later be written | |
1100 | * or 0 if this is not required | |
1101 | */ | |
1102 | static size_t | |
1103 | rip_auth_header_write (struct stream *s, struct rip_interface *ri, | |
1104 | struct key *key, char *auth_str, int len) | |
1105 | { | |
1106 | assert (ri->auth_type != RIP_NO_AUTH); | |
1107 | ||
1108 | switch (ri->auth_type) | |
1109 | { | |
1110 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1111 | rip_auth_prepare_str_send (ri, key, auth_str, len); | |
1112 | rip_auth_simple_write (s, auth_str, len); | |
1113 | return 0; | |
1114 | case RIP_AUTH_MD5: | |
1115 | return rip_auth_md5_ah_write (s, ri, key); | |
1116 | } | |
1117 | assert (1); | |
98fd1e61 | 1118 | return 0; |
b14ee00b | 1119 | } |
1120 | ||
1121 | /* Write RIPv2 MD5 authentication data trailer */ | |
1122 | static void | |
1123 | rip_auth_md5_set (struct stream *s, struct rip_interface *ri, size_t doff, | |
1124 | char *auth_str, int authlen) | |
1125 | { | |
1126 | unsigned long len; | |
c1a03d47 | 1127 | MD5_CTX ctx; |
b14ee00b | 1128 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
718e3744 | 1129 | |
b14ee00b | 1130 | /* Make it sure this interface is configured as MD5 |
1131 | authentication. */ | |
1132 | assert ((ri->auth_type == RIP_AUTH_MD5) && (authlen == RIP_AUTH_MD5_SIZE)); | |
1133 | assert (doff > 0); | |
1134 | ||
1135 | /* Get packet length. */ | |
1136 | len = stream_get_endp(s); | |
1137 | ||
1138 | /* Check packet length. */ | |
1139 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) | |
1140 | { | |
1141 | zlog_err ("rip_auth_md5_set(): packet length %ld is less than minimum length.", len); | |
1142 | return; | |
1143 | } | |
1144 | ||
1145 | /* Set the digest offset length in the header */ | |
1146 | stream_putw_at (s, doff, len); | |
1147 | ||
718e3744 | 1148 | /* Set authentication data. */ |
ca5e516c | 1149 | stream_putw (s, RIP_FAMILY_AUTH); |
1150 | stream_putw (s, RIP_AUTH_DATA); | |
718e3744 | 1151 | |
1152 | /* Generate a digest for the RIP packet. */ | |
c1a03d47 | 1153 | memset(&ctx, 0, sizeof(ctx)); |
1154 | MD5Init(&ctx); | |
98fd1e61 | 1155 | MD5Update(&ctx, STREAM_DATA (s), stream_get_endp (s)); |
c1a03d47 | 1156 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); |
1157 | MD5Final(digest, &ctx); | |
718e3744 | 1158 | |
1159 | /* Copy the digest to the packet. */ | |
1160 | stream_write (s, digest, RIP_AUTH_MD5_SIZE); | |
1161 | } | |
1162 | ||
1163 | /* RIP routing information. */ | |
dc63bfd4 | 1164 | static void |
718e3744 | 1165 | rip_response_process (struct rip_packet *packet, int size, |
c49ad8f1 | 1166 | struct sockaddr_in *from, struct connected *ifc) |
718e3744 | 1167 | { |
1168 | caddr_t lim; | |
1169 | struct rte *rte; | |
727d104b | 1170 | struct prefix_ipv4 ifaddr; |
1171 | struct prefix_ipv4 ifaddrclass; | |
727d104b | 1172 | int subnetted; |
4608cb43 DS |
1173 | |
1174 | memset(&ifaddr, 0, sizeof(ifaddr)); | |
727d104b | 1175 | /* We don't know yet. */ |
1176 | subnetted = -1; | |
1177 | ||
718e3744 | 1178 | /* The Response must be ignored if it is not from the RIP |
1179 | port. (RFC2453 - Sec. 3.9.2)*/ | |
ca5e516c | 1180 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) |
718e3744 | 1181 | { |
1182 | zlog_info ("response doesn't come from RIP port: %d", | |
1183 | from->sin_port); | |
1184 | rip_peer_bad_packet (from); | |
1185 | return; | |
1186 | } | |
1187 | ||
1188 | /* The datagram's IPv4 source address should be checked to see | |
1189 | whether the datagram is from a valid neighbor; the source of the | |
35a60c2d | 1190 | datagram must be on a directly connected network (RFC2453 - Sec. 3.9.2) */ |
0aabccc0 | 1191 | if (if_lookup_address((void *)&from->sin_addr, AF_INET) == NULL) |
718e3744 | 1192 | { |
1193 | zlog_info ("This datagram doesn't came from a valid neighbor: %s", | |
1194 | inet_ntoa (from->sin_addr)); | |
1195 | rip_peer_bad_packet (from); | |
1196 | return; | |
1197 | } | |
1198 | ||
1199 | /* It is also worth checking to see whether the response is from one | |
1200 | of the router's own addresses. */ | |
1201 | ||
1202 | ; /* Alredy done in rip_read () */ | |
1203 | ||
1204 | /* Update RIP peer. */ | |
1205 | rip_peer_update (from, packet->version); | |
1206 | ||
1207 | /* Set RTE pointer. */ | |
1208 | rte = packet->rte; | |
1209 | ||
1210 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) | |
1211 | { | |
1212 | /* RIPv2 authentication check. */ | |
1213 | /* If the Address Family Identifier of the first (and only the | |
1214 | first) entry in the message is 0xFFFF, then the remainder of | |
1215 | the entry contains the authentication. */ | |
1216 | /* If the packet gets here it means authentication enabled */ | |
1217 | /* Check is done in rip_read(). So, just skipping it */ | |
1218 | if (packet->version == RIPv2 && | |
1219 | rte == packet->rte && | |
ca5e516c | 1220 | rte->family == htons(RIP_FAMILY_AUTH)) |
718e3744 | 1221 | continue; |
1222 | ||
ca5e516c | 1223 | if (rte->family != htons(AF_INET)) |
718e3744 | 1224 | { |
1225 | /* Address family check. RIP only supports AF_INET. */ | |
1226 | zlog_info ("Unsupported family %d from %s.", | |
1227 | ntohs (rte->family), inet_ntoa (from->sin_addr)); | |
1228 | continue; | |
1229 | } | |
1230 | ||
1231 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1232 | or 127) */ | |
1233 | if (! rip_destination_check (rte->prefix)) | |
1234 | { | |
1235 | zlog_info ("Network is net 0 or net 127 or it is not unicast network"); | |
1236 | rip_peer_bad_route (from); | |
1237 | continue; | |
1238 | } | |
1239 | ||
1240 | /* Convert metric value to host byte order. */ | |
1241 | rte->metric = ntohl (rte->metric); | |
1242 | ||
1243 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ | |
1244 | if (! (rte->metric >= 1 && rte->metric <= 16)) | |
1245 | { | |
1246 | zlog_info ("Route's metric is not in the 1-16 range."); | |
1247 | rip_peer_bad_route (from); | |
1248 | continue; | |
1249 | } | |
1250 | ||
1251 | /* RIPv1 does not have nexthop value. */ | |
1252 | if (packet->version == RIPv1 && rte->nexthop.s_addr != 0) | |
1253 | { | |
1254 | zlog_info ("RIPv1 packet with nexthop value %s", | |
1255 | inet_ntoa (rte->nexthop)); | |
1256 | rip_peer_bad_route (from); | |
1257 | continue; | |
1258 | } | |
1259 | ||
1260 | /* That is, if the provided information is ignored, a possibly | |
1261 | sub-optimal, but absolutely valid, route may be taken. If | |
1262 | the received Next Hop is not directly reachable, it should be | |
1263 | treated as 0.0.0.0. */ | |
1264 | if (packet->version == RIPv2 && rte->nexthop.s_addr != 0) | |
1265 | { | |
1266 | u_int32_t addrval; | |
1267 | ||
1268 | /* Multicast address check. */ | |
1269 | addrval = ntohl (rte->nexthop.s_addr); | |
1270 | if (IN_CLASSD (addrval)) | |
1271 | { | |
1272 | zlog_info ("Nexthop %s is multicast address, skip this rte", | |
1273 | inet_ntoa (rte->nexthop)); | |
1274 | continue; | |
1275 | } | |
1276 | ||
0aabccc0 | 1277 | if (! if_lookup_address ((void *)&rte->nexthop, AF_INET)) |
718e3744 | 1278 | { |
1279 | struct route_node *rn; | |
1280 | struct rip_info *rinfo; | |
1281 | ||
1282 | rn = route_node_match_ipv4 (rip->table, &rte->nexthop); | |
1283 | ||
1284 | if (rn) | |
1285 | { | |
1286 | rinfo = rn->info; | |
1287 | ||
1288 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1289 | && rinfo->sub_type == RIP_ROUTE_RTE) | |
1290 | { | |
1291 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1292 | zlog_debug ("Next hop %s is on RIP network. Set nexthop to the packet's originator", inet_ntoa (rte->nexthop)); |
718e3744 | 1293 | rte->nexthop = rinfo->from; |
1294 | } | |
1295 | else | |
1296 | { | |
1297 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1298 | zlog_debug ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
718e3744 | 1299 | rte->nexthop.s_addr = 0; |
1300 | } | |
1301 | ||
1302 | route_unlock_node (rn); | |
1303 | } | |
1304 | else | |
1305 | { | |
1306 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1307 | zlog_debug ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
718e3744 | 1308 | rte->nexthop.s_addr = 0; |
1309 | } | |
1310 | ||
1311 | } | |
1312 | } | |
1313 | ||
1314 | /* For RIPv1, there won't be a valid netmask. | |
1315 | ||
1316 | This is a best guess at the masks. If everyone was using old | |
1317 | Ciscos before the 'ip subnet zero' option, it would be almost | |
1318 | right too :-) | |
1319 | ||
1320 | Cisco summarize ripv1 advertisments to the classful boundary | |
1321 | (/16 for class B's) except when the RIP packet does to inside | |
1322 | the classful network in question. */ | |
1323 | ||
1324 | if ((packet->version == RIPv1 && rte->prefix.s_addr != 0) | |
1325 | || (packet->version == RIPv2 | |
1326 | && (rte->prefix.s_addr != 0 && rte->mask.s_addr == 0))) | |
1327 | { | |
1328 | u_int32_t destination; | |
1329 | ||
727d104b | 1330 | if (subnetted == -1) |
c49ad8f1 | 1331 | { |
1332 | memcpy (&ifaddr, ifc->address, sizeof (struct prefix_ipv4)); | |
1333 | memcpy (&ifaddrclass, &ifaddr, sizeof (struct prefix_ipv4)); | |
1334 | apply_classful_mask_ipv4 (&ifaddrclass); | |
1335 | subnetted = 0; | |
1336 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1337 | subnetted = 1; | |
1338 | } | |
727d104b | 1339 | |
1340 | destination = ntohl (rte->prefix.s_addr); | |
1341 | ||
1342 | if (IN_CLASSA (destination)) | |
1343 | masklen2ip (8, &rte->mask); | |
1344 | else if (IN_CLASSB (destination)) | |
1345 | masklen2ip (16, &rte->mask); | |
1346 | else if (IN_CLASSC (destination)) | |
718e3744 | 1347 | masklen2ip (24, &rte->mask); |
727d104b | 1348 | |
1349 | if (subnetted == 1) | |
1350 | masklen2ip (ifaddrclass.prefixlen, | |
1351 | (struct in_addr *) &destination); | |
1352 | if ((subnetted == 1) && ((rte->prefix.s_addr & destination) == | |
1353 | ifaddrclass.prefix.s_addr)) | |
1354 | { | |
1355 | masklen2ip (ifaddr.prefixlen, &rte->mask); | |
1356 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) | |
1357 | masklen2ip (32, &rte->mask); | |
1358 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1359 | zlog_debug ("Subnetted route %s", inet_ntoa (rte->prefix)); |
718e3744 | 1360 | } |
727d104b | 1361 | else |
718e3744 | 1362 | { |
727d104b | 1363 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) |
1364 | continue; | |
718e3744 | 1365 | } |
727d104b | 1366 | |
1367 | if (IS_RIP_DEBUG_EVENT) | |
718e3744 | 1368 | { |
5d6c3779 | 1369 | zlog_debug ("Resultant route %s", inet_ntoa (rte->prefix)); |
1370 | zlog_debug ("Resultant mask %s", inet_ntoa (rte->mask)); | |
718e3744 | 1371 | } |
1372 | } | |
1373 | ||
1374 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1375 | ignore the entry. */ | |
1376 | if ((packet->version == RIPv2) | |
1377 | && (rte->mask.s_addr != 0) | |
1378 | && ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr)) | |
1379 | { | |
1380 | zlog_warn ("RIPv2 address %s is not mask /%d applied one", | |
1381 | inet_ntoa (rte->prefix), ip_masklen (rte->mask)); | |
1382 | rip_peer_bad_route (from); | |
1383 | continue; | |
1384 | } | |
1385 | ||
1386 | /* Default route's netmask is ignored. */ | |
1387 | if (packet->version == RIPv2 | |
1388 | && (rte->prefix.s_addr == 0) | |
1389 | && (rte->mask.s_addr != 0)) | |
1390 | { | |
1391 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1392 | zlog_debug ("Default route with non-zero netmask. Set zero to netmask"); |
718e3744 | 1393 | rte->mask.s_addr = 0; |
1394 | } | |
1395 | ||
1396 | /* Routing table updates. */ | |
c49ad8f1 | 1397 | rip_rte_process (rte, from, ifc->ifp); |
718e3744 | 1398 | } |
1399 | } | |
1400 | ||
a4e987e0 | 1401 | /* Make socket for RIP protocol. */ |
f69bd9da | 1402 | static int |
2c61ae37 | 1403 | rip_create_socket (struct sockaddr_in *from) |
a4e987e0 | 1404 | { |
1405 | int ret; | |
1406 | int sock; | |
1407 | struct sockaddr_in addr; | |
f69bd9da | 1408 | |
2c61ae37 | 1409 | memset (&addr, 0, sizeof (struct sockaddr_in)); |
1410 | ||
1411 | if (!from) | |
f69bd9da | 1412 | { |
f69bd9da | 1413 | addr.sin_family = AF_INET; |
1414 | addr.sin_addr.s_addr = INADDR_ANY; | |
6f0e3f6e | 1415 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
2c61ae37 | 1416 | addr.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 1417 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
38d3c163 | 1418 | } else { |
1419 | memcpy(&addr, from, sizeof(addr)); | |
f69bd9da | 1420 | } |
1421 | ||
2c61ae37 | 1422 | /* sending port must always be the RIP port */ |
1423 | addr.sin_port = htons (RIP_PORT_DEFAULT); | |
1424 | ||
a4e987e0 | 1425 | /* Make datagram socket. */ |
1426 | sock = socket (AF_INET, SOCK_DGRAM, 0); | |
1427 | if (sock < 0) | |
1428 | { | |
1429 | zlog_err("Cannot create UDP socket: %s", safe_strerror(errno)); | |
1430 | exit (1); | |
1431 | } | |
1432 | ||
1433 | sockopt_broadcast (sock); | |
1434 | sockopt_reuseaddr (sock); | |
1435 | sockopt_reuseport (sock); | |
a4e987e0 | 1436 | #ifdef RIP_RECVMSG |
1437 | setsockopt_pktinfo (sock); | |
1438 | #endif /* RIP_RECVMSG */ | |
78b31d5c SH |
1439 | #ifdef IPTOS_PREC_INTERNETCONTROL |
1440 | setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL); | |
1441 | #endif | |
a4e987e0 | 1442 | |
1443 | if (ripd_privs.change (ZPRIVS_RAISE)) | |
1444 | zlog_err ("rip_create_socket: could not raise privs"); | |
f69bd9da | 1445 | setsockopt_so_recvbuf (sock, RIP_UDP_RCV_BUF); |
1446 | if ( (ret = bind (sock, (struct sockaddr *) & addr, sizeof (addr))) < 0) | |
1447 | ||
a4e987e0 | 1448 | { |
1449 | int save_errno = errno; | |
1450 | if (ripd_privs.change (ZPRIVS_LOWER)) | |
1451 | zlog_err ("rip_create_socket: could not lower privs"); | |
2c61ae37 | 1452 | |
1453 | zlog_err("%s: Can't bind socket %d to %s port %d: %s", __func__, | |
1454 | sock, inet_ntoa(addr.sin_addr), | |
1455 | (int) ntohs(addr.sin_port), | |
1456 | safe_strerror(save_errno)); | |
1457 | ||
f69bd9da | 1458 | close (sock); |
a4e987e0 | 1459 | return ret; |
1460 | } | |
f69bd9da | 1461 | |
a4e987e0 | 1462 | if (ripd_privs.change (ZPRIVS_LOWER)) |
1463 | zlog_err ("rip_create_socket: could not lower privs"); | |
1464 | ||
1465 | return sock; | |
1466 | } | |
1467 | ||
c49ad8f1 | 1468 | /* RIP packet send to destination address, on interface denoted by |
1469 | * by connected argument. NULL to argument denotes destination should be | |
1470 | * should be RIP multicast group | |
1471 | */ | |
dc63bfd4 | 1472 | static int |
c49ad8f1 | 1473 | rip_send_packet (u_char * buf, int size, struct sockaddr_in *to, |
1474 | struct connected *ifc) | |
718e3744 | 1475 | { |
931cd54d | 1476 | int ret, send_sock; |
718e3744 | 1477 | struct sockaddr_in sin; |
c49ad8f1 | 1478 | |
1479 | assert (ifc != NULL); | |
1480 | ||
931cd54d | 1481 | if (IS_RIP_DEBUG_PACKET) |
1482 | { | |
f69bd9da | 1483 | #define ADDRESS_SIZE 20 |
1484 | char dst[ADDRESS_SIZE]; | |
1485 | dst[ADDRESS_SIZE - 1] = '\0'; | |
1486 | ||
931cd54d | 1487 | if (to) |
1488 | { | |
f69bd9da | 1489 | strncpy (dst, inet_ntoa(to->sin_addr), ADDRESS_SIZE - 1); |
931cd54d | 1490 | } |
1491 | else | |
1492 | { | |
1493 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); | |
f69bd9da | 1494 | strncpy (dst, inet_ntoa(sin.sin_addr), ADDRESS_SIZE - 1); |
931cd54d | 1495 | } |
f69bd9da | 1496 | #undef ADDRESS_SIZE |
5d6c3779 | 1497 | zlog_debug("rip_send_packet %s > %s (%s)", |
c49ad8f1 | 1498 | inet_ntoa(ifc->address->u.prefix4), |
1499 | dst, ifc->ifp->name); | |
931cd54d | 1500 | } |
f69bd9da | 1501 | |
c49ad8f1 | 1502 | if ( CHECK_FLAG (ifc->flags, ZEBRA_IFA_SECONDARY) ) |
931cd54d | 1503 | { |
1504 | /* | |
1505 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is configured | |
1506 | * with multiple addresses on the same subnet: the first address | |
1507 | * on the subnet is configured "primary", and all subsequent addresses | |
1508 | * on that subnet are treated as "secondary" addresses. | |
1509 | * In order to avoid routing-table bloat on other rip listeners, | |
1510 | * we do not send out RIP packets with ZEBRA_IFA_SECONDARY source addrs. | |
1511 | * XXX Since Linux is the only system for which the ZEBRA_IFA_SECONDARY | |
1512 | * flag is set, we would end up sending a packet for a "secondary" | |
1513 | * source address on non-linux systems. | |
1514 | */ | |
1515 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1516 | zlog_debug("duplicate dropped"); |
931cd54d | 1517 | return 0; |
1518 | } | |
1519 | ||
718e3744 | 1520 | /* Make destination address. */ |
1521 | memset (&sin, 0, sizeof (struct sockaddr_in)); | |
1522 | sin.sin_family = AF_INET; | |
6f0e3f6e | 1523 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
718e3744 | 1524 | sin.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 1525 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 1526 | |
1527 | /* When destination is specified, use it's port and address. */ | |
1528 | if (to) | |
1529 | { | |
718e3744 | 1530 | sin.sin_port = to->sin_port; |
1531 | sin.sin_addr = to->sin_addr; | |
931cd54d | 1532 | send_sock = rip->sock; |
718e3744 | 1533 | } |
1534 | else | |
1535 | { | |
2c61ae37 | 1536 | struct sockaddr_in from; |
1537 | ||
718e3744 | 1538 | sin.sin_port = htons (RIP_PORT_DEFAULT); |
1539 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); | |
2c61ae37 | 1540 | |
1541 | /* multicast send should bind to local interface address */ | |
bb2315f2 | 1542 | memset (&from, 0, sizeof (from)); |
2c61ae37 | 1543 | from.sin_family = AF_INET; |
1544 | from.sin_port = htons (RIP_PORT_DEFAULT); | |
1545 | from.sin_addr = ifc->address->u.prefix4; | |
6f0e3f6e | 1546 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
2c61ae37 | 1547 | from.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 1548 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
2c61ae37 | 1549 | |
931cd54d | 1550 | /* |
1551 | * we have to open a new socket for each packet because this | |
1552 | * is the most portable way to bind to a different source | |
1553 | * ipv4 address for each packet. | |
1554 | */ | |
2c61ae37 | 1555 | if ( (send_sock = rip_create_socket (&from)) < 0) |
931cd54d | 1556 | { |
f69bd9da | 1557 | zlog_warn("rip_send_packet could not create socket."); |
931cd54d | 1558 | return -1; |
f69bd9da | 1559 | } |
c49ad8f1 | 1560 | rip_interface_multicast_set (send_sock, ifc); |
718e3744 | 1561 | } |
1562 | ||
931cd54d | 1563 | ret = sendto (send_sock, buf, size, 0, (struct sockaddr *)&sin, |
718e3744 | 1564 | sizeof (struct sockaddr_in)); |
1565 | ||
1566 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1567 | zlog_debug ("SEND to %s.%d", inet_ntoa(sin.sin_addr), |
cc1131ab | 1568 | ntohs (sin.sin_port)); |
718e3744 | 1569 | |
1570 | if (ret < 0) | |
6099b3b5 | 1571 | zlog_warn ("can't send packet : %s", safe_strerror (errno)); |
718e3744 | 1572 | |
931cd54d | 1573 | if (!to) |
1574 | close(send_sock); | |
1575 | ||
718e3744 | 1576 | return ret; |
1577 | } | |
1578 | ||
1579 | /* Add redistributed route to RIP table. */ | |
1580 | void | |
1581 | rip_redistribute_add (int type, int sub_type, struct prefix_ipv4 *p, | |
b892f1dd | 1582 | ifindex_t ifindex, struct in_addr *nexthop, |
fbf5d033 | 1583 | unsigned int metric, unsigned char distance) |
718e3744 | 1584 | { |
1585 | int ret; | |
bce8e868 LF |
1586 | struct route_node *rp = NULL; |
1587 | struct rip_info *rinfo = NULL, newinfo; | |
1588 | struct list *list = NULL; | |
718e3744 | 1589 | |
1590 | /* Redistribute route */ | |
1591 | ret = rip_destination_check (p->prefix); | |
1592 | if (! ret) | |
1593 | return; | |
1594 | ||
1595 | rp = route_node_get (rip->table, (struct prefix *) p); | |
1596 | ||
bce8e868 LF |
1597 | memset (&newinfo, 0, sizeof (struct rip_info)); |
1598 | newinfo.type = type; | |
1599 | newinfo.sub_type = sub_type; | |
1600 | newinfo.ifindex = ifindex; | |
1601 | newinfo.metric = 1; | |
1602 | newinfo.external_metric = metric; | |
1603 | newinfo.distance = distance; | |
1604 | newinfo.rp = rp; | |
1605 | if (nexthop) | |
1606 | newinfo.nexthop = *nexthop; | |
718e3744 | 1607 | |
bce8e868 | 1608 | if ((list = rp->info) != NULL && listcount (list) != 0) |
718e3744 | 1609 | { |
bce8e868 LF |
1610 | rinfo = listgetdata (listhead (list)); |
1611 | ||
718e3744 | 1612 | if (rinfo->type == ZEBRA_ROUTE_CONNECT |
1613 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1614 | && rinfo->metric != RIP_METRIC_INFINITY) | |
1615 | { | |
1616 | route_unlock_node (rp); | |
1617 | return; | |
1618 | } | |
1619 | ||
1620 | /* Manually configured RIP route check. */ | |
1621 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
16705130 | 1622 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
1623 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) ) | |
718e3744 | 1624 | { |
16705130 | 1625 | if (type != ZEBRA_ROUTE_RIP || ((sub_type != RIP_ROUTE_STATIC) && |
1626 | (sub_type != RIP_ROUTE_DEFAULT))) | |
718e3744 | 1627 | { |
1628 | route_unlock_node (rp); | |
1629 | return; | |
1630 | } | |
1631 | } | |
1632 | ||
bce8e868 LF |
1633 | rinfo = rip_ecmp_replace (&newinfo); |
1634 | route_unlock_node (rp); | |
718e3744 | 1635 | } |
bce8e868 LF |
1636 | else |
1637 | rinfo = rip_ecmp_add (&newinfo); | |
718e3744 | 1638 | |
16705130 | 1639 | if (IS_RIP_DEBUG_EVENT) { |
1640 | if (!nexthop) | |
5d6c3779 | 1641 | zlog_debug ("Redistribute new prefix %s/%d on the interface %s", |
16705130 | 1642 | inet_ntoa(p->prefix), p->prefixlen, |
1643 | ifindex2ifname(ifindex)); | |
1644 | else | |
5d6c3779 | 1645 | zlog_debug ("Redistribute new prefix %s/%d with nexthop %s on the interface %s", |
16705130 | 1646 | inet_ntoa(p->prefix), p->prefixlen, inet_ntoa(rinfo->nexthop), |
1647 | ifindex2ifname(ifindex)); | |
1648 | } | |
1649 | ||
718e3744 | 1650 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
1651 | } | |
1652 | ||
1653 | /* Delete redistributed route from RIP table. */ | |
1654 | void | |
1655 | rip_redistribute_delete (int type, int sub_type, struct prefix_ipv4 *p, | |
b892f1dd | 1656 | ifindex_t ifindex) |
718e3744 | 1657 | { |
1658 | int ret; | |
1659 | struct route_node *rp; | |
1660 | struct rip_info *rinfo; | |
1661 | ||
1662 | ret = rip_destination_check (p->prefix); | |
1663 | if (! ret) | |
1664 | return; | |
1665 | ||
1666 | rp = route_node_lookup (rip->table, (struct prefix *) p); | |
1667 | if (rp) | |
1668 | { | |
bce8e868 | 1669 | struct list *list = rp->info; |
718e3744 | 1670 | |
bce8e868 LF |
1671 | if (list != NULL && listcount (list) != 0) |
1672 | { | |
1673 | rinfo = listgetdata (listhead (list)); | |
1674 | if (rinfo != NULL | |
1675 | && rinfo->type == type | |
1676 | && rinfo->sub_type == sub_type | |
1677 | && rinfo->ifindex == ifindex) | |
1678 | { | |
1679 | /* Perform poisoned reverse. */ | |
1680 | rinfo->metric = RIP_METRIC_INFINITY; | |
1681 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
1682 | rip_garbage_collect, rip->garbage_time); | |
1683 | RIP_TIMER_OFF (rinfo->t_timeout); | |
1684 | rinfo->flags |= RIP_RTF_CHANGED; | |
718e3744 | 1685 | |
bce8e868 LF |
1686 | if (IS_RIP_DEBUG_EVENT) |
1687 | zlog_debug ("Poisone %s/%d on the interface %s with an " | |
1688 | "infinity metric [delete]", | |
1689 | inet_ntoa(p->prefix), p->prefixlen, | |
1690 | ifindex2ifname(ifindex)); | |
16705130 | 1691 | |
bce8e868 LF |
1692 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
1693 | } | |
1694 | } | |
1695 | route_unlock_node (rp); | |
718e3744 | 1696 | } |
1697 | } | |
1698 | ||
1699 | /* Response to request called from rip_read ().*/ | |
dc63bfd4 | 1700 | static void |
718e3744 | 1701 | rip_request_process (struct rip_packet *packet, int size, |
c49ad8f1 | 1702 | struct sockaddr_in *from, struct connected *ifc) |
718e3744 | 1703 | { |
1704 | caddr_t lim; | |
1705 | struct rte *rte; | |
1706 | struct prefix_ipv4 p; | |
1707 | struct route_node *rp; | |
1708 | struct rip_info *rinfo; | |
1709 | struct rip_interface *ri; | |
1710 | ||
16705130 | 1711 | /* Does not reponse to the requests on the loopback interfaces */ |
c49ad8f1 | 1712 | if (if_is_loopback (ifc->ifp)) |
16705130 | 1713 | return; |
1714 | ||
429a0f8c | 1715 | /* Check RIP process is enabled on this interface. */ |
c49ad8f1 | 1716 | ri = ifc->ifp->info; |
16705130 | 1717 | if (! ri->running) |
1718 | return; | |
718e3744 | 1719 | |
1720 | /* When passive interface is specified, suppress responses */ | |
1721 | if (ri->passive) | |
1722 | return; | |
c49ad8f1 | 1723 | |
718e3744 | 1724 | /* RIP peer update. */ |
1725 | rip_peer_update (from, packet->version); | |
1726 | ||
1727 | lim = ((caddr_t) packet) + size; | |
1728 | rte = packet->rte; | |
1729 | ||
1730 | /* The Request is processed entry by entry. If there are no | |
1731 | entries, no response is given. */ | |
1732 | if (lim == (caddr_t) rte) | |
1733 | return; | |
1734 | ||
1735 | /* There is one special case. If there is exactly one entry in the | |
1736 | request, and it has an address family identifier of zero and a | |
1737 | metric of infinity (i.e., 16), then this is a request to send the | |
1738 | entire routing table. */ | |
1739 | if (lim == ((caddr_t) (rte + 1)) && | |
1740 | ntohs (rte->family) == 0 && | |
1741 | ntohl (rte->metric) == RIP_METRIC_INFINITY) | |
1742 | { | |
1743 | /* All route with split horizon */ | |
c49ad8f1 | 1744 | rip_output_process (ifc, from, rip_all_route, packet->version); |
718e3744 | 1745 | } |
1746 | else | |
1747 | { | |
1748 | /* Examine the list of RTEs in the Request one by one. For each | |
1749 | entry, look up the destination in the router's routing | |
1750 | database and, if there is a route, put that route's metric in | |
1751 | the metric field of the RTE. If there is no explicit route | |
1752 | to the specified destination, put infinity in the metric | |
1753 | field. Once all the entries have been filled in, change the | |
1754 | command from Request to Response and send the datagram back | |
1755 | to the requestor. */ | |
1756 | p.family = AF_INET; | |
1757 | ||
1758 | for (; ((caddr_t) rte) < lim; rte++) | |
1759 | { | |
1760 | p.prefix = rte->prefix; | |
1761 | p.prefixlen = ip_masklen (rte->mask); | |
1762 | apply_mask_ipv4 (&p); | |
1763 | ||
1764 | rp = route_node_lookup (rip->table, (struct prefix *) &p); | |
1765 | if (rp) | |
1766 | { | |
bce8e868 | 1767 | rinfo = listgetdata (listhead ((struct list *)rp->info)); |
718e3744 | 1768 | rte->metric = htonl (rinfo->metric); |
1769 | route_unlock_node (rp); | |
1770 | } | |
1771 | else | |
1772 | rte->metric = htonl (RIP_METRIC_INFINITY); | |
1773 | } | |
1774 | packet->command = RIP_RESPONSE; | |
1775 | ||
c49ad8f1 | 1776 | rip_send_packet ((u_char *)packet, size, from, ifc); |
718e3744 | 1777 | } |
1778 | rip_global_queries++; | |
1779 | } | |
1780 | ||
1781 | #if RIP_RECVMSG | |
1782 | /* Set IPv6 packet info to the socket. */ | |
1783 | static int | |
1784 | setsockopt_pktinfo (int sock) | |
1785 | { | |
1786 | int ret; | |
1787 | int val = 1; | |
1788 | ||
1789 | ret = setsockopt(sock, IPPROTO_IP, IP_PKTINFO, &val, sizeof(val)); | |
1790 | if (ret < 0) | |
6099b3b5 | 1791 | zlog_warn ("Can't setsockopt IP_PKTINFO : %s", safe_strerror (errno)); |
718e3744 | 1792 | return ret; |
1793 | } | |
1794 | ||
1795 | /* Read RIP packet by recvmsg function. */ | |
1796 | int | |
1797 | rip_recvmsg (int sock, u_char *buf, int size, struct sockaddr_in *from, | |
b892f1dd | 1798 | ifindex_t *ifindex) |
718e3744 | 1799 | { |
1800 | int ret; | |
1801 | struct msghdr msg; | |
1802 | struct iovec iov; | |
1803 | struct cmsghdr *ptr; | |
1804 | char adata[1024]; | |
1805 | ||
1806 | msg.msg_name = (void *) from; | |
1807 | msg.msg_namelen = sizeof (struct sockaddr_in); | |
1808 | msg.msg_iov = &iov; | |
1809 | msg.msg_iovlen = 1; | |
1810 | msg.msg_control = (void *) adata; | |
1811 | msg.msg_controllen = sizeof adata; | |
1812 | iov.iov_base = buf; | |
1813 | iov.iov_len = size; | |
1814 | ||
1815 | ret = recvmsg (sock, &msg, 0); | |
1816 | if (ret < 0) | |
1817 | return ret; | |
1818 | ||
b99760ab | 1819 | for (ptr = ZCMSG_FIRSTHDR(&msg); ptr != NULL; ptr = CMSG_NXTHDR(&msg, ptr)) |
718e3744 | 1820 | if (ptr->cmsg_level == IPPROTO_IP && ptr->cmsg_type == IP_PKTINFO) |
1821 | { | |
1822 | struct in_pktinfo *pktinfo; | |
1823 | int i; | |
1824 | ||
1825 | pktinfo = (struct in_pktinfo *) CMSG_DATA (ptr); | |
1826 | i = pktinfo->ipi_ifindex; | |
1827 | } | |
1828 | return ret; | |
1829 | } | |
1830 | ||
1831 | /* RIP packet read function. */ | |
1832 | int | |
1833 | rip_read_new (struct thread *t) | |
1834 | { | |
1835 | int ret; | |
1836 | int sock; | |
1837 | char buf[RIP_PACKET_MAXSIZ]; | |
1838 | struct sockaddr_in from; | |
b892f1dd | 1839 | ifindex_t ifindex; |
718e3744 | 1840 | |
1841 | /* Fetch socket then register myself. */ | |
1842 | sock = THREAD_FD (t); | |
1843 | rip_event (RIP_READ, sock); | |
1844 | ||
1845 | /* Read RIP packet. */ | |
1846 | ret = rip_recvmsg (sock, buf, RIP_PACKET_MAXSIZ, &from, (int *)&ifindex); | |
1847 | if (ret < 0) | |
1848 | { | |
6099b3b5 | 1849 | zlog_warn ("Can't read RIP packet: %s", safe_strerror (errno)); |
718e3744 | 1850 | return ret; |
1851 | } | |
1852 | ||
1853 | return ret; | |
1854 | } | |
1855 | #endif /* RIP_RECVMSG */ | |
1856 | ||
1857 | /* First entry point of RIP packet. */ | |
dc63bfd4 | 1858 | static int |
718e3744 | 1859 | rip_read (struct thread *t) |
1860 | { | |
1861 | int sock; | |
1862 | int ret; | |
1863 | int rtenum; | |
1864 | union rip_buf rip_buf; | |
1865 | struct rip_packet *packet; | |
1866 | struct sockaddr_in from; | |
11dde9c2 | 1867 | int len; |
3e557ae1 | 1868 | int vrecv; |
11dde9c2 | 1869 | socklen_t fromlen; |
718e3744 | 1870 | struct interface *ifp; |
c49ad8f1 | 1871 | struct connected *ifc; |
718e3744 | 1872 | struct rip_interface *ri; |
bd40c341 | 1873 | struct prefix p; |
718e3744 | 1874 | |
1875 | /* Fetch socket then register myself. */ | |
1876 | sock = THREAD_FD (t); | |
1877 | rip->t_read = NULL; | |
1878 | ||
1879 | /* Add myself to tne next event */ | |
1880 | rip_event (RIP_READ, sock); | |
1881 | ||
1882 | /* RIPd manages only IPv4. */ | |
1883 | memset (&from, 0, sizeof (struct sockaddr_in)); | |
1884 | fromlen = sizeof (struct sockaddr_in); | |
1885 | ||
1886 | len = recvfrom (sock, (char *)&rip_buf.buf, sizeof (rip_buf.buf), 0, | |
1887 | (struct sockaddr *) &from, &fromlen); | |
1888 | if (len < 0) | |
1889 | { | |
6099b3b5 | 1890 | zlog_info ("recvfrom failed: %s", safe_strerror (errno)); |
718e3744 | 1891 | return len; |
1892 | } | |
1893 | ||
1894 | /* Check is this packet comming from myself? */ | |
31a476c7 | 1895 | if (if_check_address (from.sin_addr)) |
718e3744 | 1896 | { |
1897 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1898 | zlog_debug ("ignore packet comes from myself"); |
718e3744 | 1899 | return -1; |
1900 | } | |
1901 | ||
1902 | /* Which interface is this packet comes from. */ | |
0aabccc0 | 1903 | ifp = if_lookup_address ((void *)&from.sin_addr, AF_INET); |
c49ad8f1 | 1904 | |
718e3744 | 1905 | /* RIP packet received */ |
1906 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1907 | zlog_debug ("RECV packet from %s port %d on %s", |
718e3744 | 1908 | inet_ntoa (from.sin_addr), ntohs (from.sin_port), |
1909 | ifp ? ifp->name : "unknown"); | |
1910 | ||
1911 | /* If this packet come from unknown interface, ignore it. */ | |
1912 | if (ifp == NULL) | |
1913 | { | |
766a0ca3 | 1914 | zlog_info ("rip_read: cannot find interface for packet from %s port %d", |
1915 | inet_ntoa(from.sin_addr), ntohs (from.sin_port)); | |
c49ad8f1 | 1916 | return -1; |
1917 | } | |
bd40c341 DS |
1918 | |
1919 | p.family = AF_INET; | |
1920 | p.u.prefix4 = from.sin_addr; | |
1921 | p.prefixlen = IPV4_MAX_BITLEN; | |
1922 | ||
1923 | ifc = connected_lookup_prefix (ifp, &p); | |
c49ad8f1 | 1924 | |
1925 | if (ifc == NULL) | |
1926 | { | |
766a0ca3 | 1927 | zlog_info ("rip_read: cannot find connected address for packet from %s " |
1928 | "port %d on interface %s", | |
1929 | inet_ntoa(from.sin_addr), ntohs (from.sin_port), ifp->name); | |
718e3744 | 1930 | return -1; |
1931 | } | |
1932 | ||
1933 | /* Packet length check. */ | |
1934 | if (len < RIP_PACKET_MINSIZ) | |
1935 | { | |
1936 | zlog_warn ("packet size %d is smaller than minimum size %d", | |
1937 | len, RIP_PACKET_MINSIZ); | |
1938 | rip_peer_bad_packet (&from); | |
1939 | return len; | |
1940 | } | |
1941 | if (len > RIP_PACKET_MAXSIZ) | |
1942 | { | |
1943 | zlog_warn ("packet size %d is larger than max size %d", | |
1944 | len, RIP_PACKET_MAXSIZ); | |
1945 | rip_peer_bad_packet (&from); | |
1946 | return len; | |
1947 | } | |
1948 | ||
1949 | /* Packet alignment check. */ | |
1950 | if ((len - RIP_PACKET_MINSIZ) % 20) | |
1951 | { | |
1952 | zlog_warn ("packet size %d is wrong for RIP packet alignment", len); | |
1953 | rip_peer_bad_packet (&from); | |
1954 | return len; | |
1955 | } | |
1956 | ||
1957 | /* Set RTE number. */ | |
1958 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1959 | ||
1960 | /* For easy to handle. */ | |
1961 | packet = &rip_buf.rip_packet; | |
1962 | ||
1963 | /* RIP version check. */ | |
1964 | if (packet->version == 0) | |
1965 | { | |
1966 | zlog_info ("version 0 with command %d received.", packet->command); | |
1967 | rip_peer_bad_packet (&from); | |
1968 | return -1; | |
1969 | } | |
1970 | ||
1971 | /* Dump RIP packet. */ | |
1972 | if (IS_RIP_DEBUG_RECV) | |
1973 | rip_packet_dump (packet, len, "RECV"); | |
1974 | ||
1975 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1976 | that "Version 1 implementations are to ignore this extra data and | |
1977 | process only the fields specified in this document.". So RIPv3 | |
1978 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1979 | if (packet->version > RIPv2) | |
1980 | packet->version = RIPv2; | |
1981 | ||
1982 | /* Is RIP running or is this RIP neighbor ?*/ | |
1983 | ri = ifp->info; | |
1984 | if (! ri->running && ! rip_neighbor_lookup (&from)) | |
1985 | { | |
1986 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1987 | zlog_debug ("RIP is not enabled on interface %s.", ifp->name); |
718e3744 | 1988 | rip_peer_bad_packet (&from); |
1989 | return -1; | |
1990 | } | |
1991 | ||
15a2b089 | 1992 | /* RIP Version check. RFC2453, 4.6 and 5.1 */ |
3e557ae1 PJ |
1993 | vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? |
1994 | rip->version_recv : ri->ri_receive); | |
15a2b089 | 1995 | if ((packet->version == RIPv1) && !(vrecv & RIPv1)) |
718e3744 | 1996 | { |
15a2b089 PJ |
1997 | if (IS_RIP_DEBUG_PACKET) |
1998 | zlog_debug (" packet's v%d doesn't fit to if version spec", | |
1999 | packet->version); | |
2000 | rip_peer_bad_packet (&from); | |
2001 | return -1; | |
718e3744 | 2002 | } |
15a2b089 PJ |
2003 | if ((packet->version == RIPv2) && !(vrecv & RIPv2)) |
2004 | { | |
2005 | if (IS_RIP_DEBUG_PACKET) | |
2006 | zlog_debug (" packet's v%d doesn't fit to if version spec", | |
2007 | packet->version); | |
2008 | rip_peer_bad_packet (&from); | |
2009 | return -1; | |
2010 | } | |
2011 | ||
718e3744 | 2012 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 |
2013 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
2014 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
718e3744 | 2015 | if ((ri->auth_type == RIP_NO_AUTH) |
2016 | && rtenum | |
ca5e516c | 2017 | && (packet->version == RIPv2) |
2018 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) | |
718e3744 | 2019 | { |
2020 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2021 | zlog_debug ("packet RIPv%d is dropped because authentication disabled", |
718e3744 | 2022 | packet->version); |
2023 | rip_peer_bad_packet (&from); | |
2024 | return -1; | |
2025 | } | |
15a2b089 PJ |
2026 | |
2027 | /* RFC: | |
2028 | If the router is configured to authenticate RIP-2 messages, then | |
718e3744 | 2029 | RIP-1 messages and RIP-2 messages which pass authentication |
2030 | testing shall be accepted; unauthenticated and failed | |
2031 | authentication RIP-2 messages shall be discarded. For maximum | |
2032 | security, RIP-1 messages should be ignored when authentication is | |
2033 | in use (see section 4.1); otherwise, the routing information from | |
2034 | authenticated messages will be propagated by RIP-1 routers in an | |
15a2b089 PJ |
2035 | unauthenticated manner. |
2036 | */ | |
2037 | /* We make an exception for RIPv1 REQUEST packets, to which we'll | |
2038 | * always reply regardless of authentication settings, because: | |
2039 | * | |
2040 | * - if there other authorised routers on-link, the REQUESTor can | |
2041 | * passively obtain the routing updates anyway | |
2042 | * - if there are no other authorised routers on-link, RIP can | |
2043 | * easily be disabled for the link to prevent giving out information | |
2044 | * on state of this routers RIP routing table.. | |
2045 | * | |
2046 | * I.e. if RIPv1 has any place anymore these days, it's as a very | |
2047 | * simple way to distribute routing information (e.g. to embedded | |
2048 | * hosts / appliances) and the ability to give out RIPv1 | |
2049 | * routing-information freely, while still requiring RIPv2 | |
2050 | * authentication for any RESPONSEs might be vaguely useful. | |
2051 | */ | |
2052 | if (ri->auth_type != RIP_NO_AUTH | |
2053 | && packet->version == RIPv1) | |
718e3744 | 2054 | { |
15a2b089 PJ |
2055 | /* Discard RIPv1 messages other than REQUESTs */ |
2056 | if (packet->command != RIP_REQUEST) | |
2057 | { | |
2058 | if (IS_RIP_DEBUG_PACKET) | |
2059 | zlog_debug ("RIPv1" " dropped because authentication enabled"); | |
2060 | rip_peer_bad_packet (&from); | |
2061 | return -1; | |
2062 | } | |
2063 | } | |
2064 | else if (ri->auth_type != RIP_NO_AUTH) | |
2065 | { | |
2066 | const char *auth_desc; | |
2067 | ||
2068 | if (rtenum == 0) | |
2069 | { | |
2070 | /* There definitely is no authentication in the packet. */ | |
2071 | if (IS_RIP_DEBUG_PACKET) | |
2072 | zlog_debug ("RIPv2 authentication failed: no auth RTE in packet"); | |
2073 | rip_peer_bad_packet (&from); | |
2074 | return -1; | |
2075 | } | |
2076 | ||
2077 | /* First RTE must be an Authentication Family RTE */ | |
2078 | if (packet->rte->family != htons(RIP_FAMILY_AUTH)) | |
2079 | { | |
2080 | if (IS_RIP_DEBUG_PACKET) | |
2081 | zlog_debug ("RIPv2" " dropped because authentication enabled"); | |
718e3744 | 2082 | rip_peer_bad_packet (&from); |
2083 | return -1; | |
15a2b089 PJ |
2084 | } |
2085 | ||
718e3744 | 2086 | /* Check RIPv2 authentication. */ |
15a2b089 PJ |
2087 | switch (ntohs(packet->rte->tag)) |
2088 | { | |
2089 | case RIP_AUTH_SIMPLE_PASSWORD: | |
2090 | auth_desc = "simple"; | |
2091 | ret = rip_auth_simple_password (packet->rte, &from, ifp); | |
2092 | break; | |
2093 | ||
2094 | case RIP_AUTH_MD5: | |
2095 | auth_desc = "MD5"; | |
2096 | ret = rip_auth_md5 (packet, &from, len, ifp); | |
2097 | /* Reset RIP packet length to trim MD5 data. */ | |
2098 | len = ret; | |
2099 | break; | |
2100 | ||
2101 | default: | |
2102 | ret = 0; | |
2103 | auth_desc = "unknown type"; | |
2104 | if (IS_RIP_DEBUG_PACKET) | |
2105 | zlog_debug ("RIPv2 Unknown authentication type %d", | |
2106 | ntohs (packet->rte->tag)); | |
2107 | } | |
2108 | ||
2109 | if (ret) | |
2110 | { | |
2111 | if (IS_RIP_DEBUG_PACKET) | |
2112 | zlog_debug ("RIPv2 %s authentication success", auth_desc); | |
2113 | } | |
2114 | else | |
2115 | { | |
2116 | if (IS_RIP_DEBUG_PACKET) | |
2117 | zlog_debug ("RIPv2 %s authentication failure", auth_desc); | |
2118 | rip_peer_bad_packet (&from); | |
2119 | return -1; | |
2120 | } | |
718e3744 | 2121 | } |
2122 | ||
2123 | /* Process each command. */ | |
2124 | switch (packet->command) | |
2125 | { | |
2126 | case RIP_RESPONSE: | |
c49ad8f1 | 2127 | rip_response_process (packet, len, &from, ifc); |
718e3744 | 2128 | break; |
2129 | case RIP_REQUEST: | |
2130 | case RIP_POLL: | |
c49ad8f1 | 2131 | rip_request_process (packet, len, &from, ifc); |
718e3744 | 2132 | break; |
2133 | case RIP_TRACEON: | |
2134 | case RIP_TRACEOFF: | |
2135 | zlog_info ("Obsolete command %s received, please sent it to routed", | |
2136 | lookup (rip_msg, packet->command)); | |
2137 | rip_peer_bad_packet (&from); | |
2138 | break; | |
2139 | case RIP_POLL_ENTRY: | |
2140 | zlog_info ("Obsolete command %s received", | |
2141 | lookup (rip_msg, packet->command)); | |
2142 | rip_peer_bad_packet (&from); | |
2143 | break; | |
2144 | default: | |
2145 | zlog_info ("Unknown RIP command %d received", packet->command); | |
2146 | rip_peer_bad_packet (&from); | |
2147 | break; | |
2148 | } | |
2149 | ||
2150 | return len; | |
2151 | } | |
2152 | ||
718e3744 | 2153 | /* Write routing table entry to the stream and return next index of |
2154 | the routing table entry in the stream. */ | |
dc63bfd4 | 2155 | static int |
718e3744 | 2156 | rip_write_rte (int num, struct stream *s, struct prefix_ipv4 *p, |
b14ee00b | 2157 | u_char version, struct rip_info *rinfo) |
718e3744 | 2158 | { |
2159 | struct in_addr mask; | |
718e3744 | 2160 | |
2161 | /* Write routing table entry. */ | |
2162 | if (version == RIPv1) | |
2163 | { | |
2164 | stream_putw (s, AF_INET); | |
2165 | stream_putw (s, 0); | |
2166 | stream_put_ipv4 (s, p->prefix.s_addr); | |
2167 | stream_put_ipv4 (s, 0); | |
2168 | stream_put_ipv4 (s, 0); | |
2169 | stream_putl (s, rinfo->metric_out); | |
2170 | } | |
2171 | else | |
2172 | { | |
2173 | masklen2ip (p->prefixlen, &mask); | |
2174 | ||
2175 | stream_putw (s, AF_INET); | |
16705130 | 2176 | stream_putw (s, rinfo->tag_out); |
718e3744 | 2177 | stream_put_ipv4 (s, p->prefix.s_addr); |
2178 | stream_put_ipv4 (s, mask.s_addr); | |
2179 | stream_put_ipv4 (s, rinfo->nexthop_out.s_addr); | |
2180 | stream_putl (s, rinfo->metric_out); | |
2181 | } | |
2182 | ||
2183 | return ++num; | |
2184 | } | |
2185 | ||
2186 | /* Send update to the ifp or spcified neighbor. */ | |
2187 | void | |
c49ad8f1 | 2188 | rip_output_process (struct connected *ifc, struct sockaddr_in *to, |
2189 | int route_type, u_char version) | |
718e3744 | 2190 | { |
2191 | int ret; | |
2192 | struct stream *s; | |
2193 | struct route_node *rp; | |
2194 | struct rip_info *rinfo; | |
2195 | struct rip_interface *ri; | |
2196 | struct prefix_ipv4 *p; | |
2197 | struct prefix_ipv4 classfull; | |
727d104b | 2198 | struct prefix_ipv4 ifaddrclass; |
b14ee00b | 2199 | struct key *key = NULL; |
2200 | /* this might need to made dynamic if RIP ever supported auth methods | |
2201 | with larger key string sizes */ | |
2202 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
dc63bfd4 | 2203 | size_t doff = 0; /* offset of digest offset field */ |
2c61ae37 | 2204 | int num = 0; |
718e3744 | 2205 | int rtemax; |
01d0908a | 2206 | int subnetted = 0; |
bce8e868 LF |
2207 | struct list *list = NULL; |
2208 | struct listnode *listnode = NULL; | |
718e3744 | 2209 | |
2210 | /* Logging output event. */ | |
2211 | if (IS_RIP_DEBUG_EVENT) | |
2212 | { | |
2213 | if (to) | |
5d6c3779 | 2214 | zlog_debug ("update routes to neighbor %s", inet_ntoa (to->sin_addr)); |
718e3744 | 2215 | else |
5d6c3779 | 2216 | zlog_debug ("update routes on interface %s ifindex %d", |
c49ad8f1 | 2217 | ifc->ifp->name, ifc->ifp->ifindex); |
718e3744 | 2218 | } |
2219 | ||
2220 | /* Set output stream. */ | |
2221 | s = rip->obuf; | |
2222 | ||
2223 | /* Reset stream and RTE counter. */ | |
2224 | stream_reset (s); | |
6a7cff75 | 2225 | rtemax = RIP_MAX_RTE; |
718e3744 | 2226 | |
2227 | /* Get RIP interface. */ | |
c49ad8f1 | 2228 | ri = ifc->ifp->info; |
718e3744 | 2229 | |
2230 | /* If output interface is in simple password authentication mode, we | |
2231 | need space for authentication data. */ | |
2232 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2233 | rtemax -= 1; | |
2234 | ||
2235 | /* If output interface is in MD5 authentication mode, we need space | |
2236 | for authentication header and data. */ | |
2237 | if (ri->auth_type == RIP_AUTH_MD5) | |
2238 | rtemax -= 2; | |
2239 | ||
2240 | /* If output interface is in simple password authentication mode | |
2241 | and string or keychain is specified we need space for auth. data */ | |
b14ee00b | 2242 | if (ri->auth_type != RIP_NO_AUTH) |
718e3744 | 2243 | { |
2244 | if (ri->key_chain) | |
2245 | { | |
2246 | struct keychain *keychain; | |
2247 | ||
2248 | keychain = keychain_lookup (ri->key_chain); | |
2249 | if (keychain) | |
b14ee00b | 2250 | key = key_lookup_for_send (keychain); |
718e3744 | 2251 | } |
b14ee00b | 2252 | /* to be passed to auth functions later */ |
2253 | rip_auth_prepare_str_send (ri, key, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
718e3744 | 2254 | } |
2255 | ||
727d104b | 2256 | if (version == RIPv1) |
2257 | { | |
c49ad8f1 | 2258 | memcpy (&ifaddrclass, ifc->address, sizeof (struct prefix_ipv4)); |
727d104b | 2259 | apply_classful_mask_ipv4 (&ifaddrclass); |
2260 | subnetted = 0; | |
c49ad8f1 | 2261 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) |
01d0908a | 2262 | subnetted = 1; |
727d104b | 2263 | } |
2264 | ||
718e3744 | 2265 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
bce8e868 | 2266 | if ((list = rp->info) != NULL && listcount (list) != 0) |
718e3744 | 2267 | { |
bce8e868 | 2268 | rinfo = listgetdata (listhead (list)); |
727d104b | 2269 | /* For RIPv1, if we are subnetted, output subnets in our network */ |
2270 | /* that have the same mask as the output "interface". For other */ | |
2271 | /* networks, only the classfull version is output. */ | |
718e3744 | 2272 | |
2273 | if (version == RIPv1) | |
2274 | { | |
727d104b | 2275 | p = (struct prefix_ipv4 *) &rp->p; |
718e3744 | 2276 | |
2277 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2278 | zlog_debug("RIPv1 mask check, %s/%d considered for output", |
727d104b | 2279 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
718e3744 | 2280 | |
727d104b | 2281 | if (subnetted && |
2282 | prefix_match ((struct prefix *) &ifaddrclass, &rp->p)) | |
2283 | { | |
c49ad8f1 | 2284 | if ((ifc->address->prefixlen != rp->p.prefixlen) && |
727d104b | 2285 | (rp->p.prefixlen != 32)) |
2286 | continue; | |
2287 | } | |
2288 | else | |
2289 | { | |
2290 | memcpy (&classfull, &rp->p, sizeof(struct prefix_ipv4)); | |
2291 | apply_classful_mask_ipv4(&classfull); | |
2292 | if (rp->p.u.prefix4.s_addr != 0 && | |
2293 | classfull.prefixlen != rp->p.prefixlen) | |
2294 | continue; | |
2295 | } | |
718e3744 | 2296 | if (IS_RIP_DEBUG_PACKET) |
5d6c3779 | 2297 | zlog_debug("RIPv1 mask check, %s/%d made it through", |
727d104b | 2298 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
718e3744 | 2299 | } |
2300 | else | |
2301 | p = (struct prefix_ipv4 *) &rp->p; | |
2302 | ||
2303 | /* Apply output filters. */ | |
2304 | ret = rip_outgoing_filter (p, ri); | |
2305 | if (ret < 0) | |
2306 | continue; | |
2307 | ||
2308 | /* Changed route only output. */ | |
2309 | if (route_type == rip_changed_route && | |
2310 | (! (rinfo->flags & RIP_RTF_CHANGED))) | |
2311 | continue; | |
2312 | ||
2313 | /* Split horizon. */ | |
2314 | /* if (split_horizon == rip_split_horizon) */ | |
16705130 | 2315 | if (ri->split_horizon == RIP_SPLIT_HORIZON) |
718e3744 | 2316 | { |
42d14d98 | 2317 | /* |
2318 | * We perform split horizon for RIP and connected route. | |
2319 | * For rip routes, we want to suppress the route if we would | |
2320 | * end up sending the route back on the interface that we | |
2321 | * learned it from, with a higher metric. For connected routes, | |
2322 | * we suppress the route if the prefix is a subset of the | |
2323 | * source address that we are going to use for the packet | |
2324 | * (in order to handle the case when multiple subnets are | |
2325 | * configured on the same interface). | |
2326 | */ | |
bce8e868 LF |
2327 | int suppress = 0; |
2328 | struct rip_info *tmp_rinfo = NULL; | |
2329 | ||
2330 | for (ALL_LIST_ELEMENTS_RO (list, listnode, tmp_rinfo)) | |
2331 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP && | |
2332 | tmp_rinfo->ifindex == ifc->ifp->ifindex) | |
2333 | { | |
2334 | suppress = 1; | |
2335 | break; | |
2336 | } | |
2337 | ||
2338 | if (!suppress && rinfo->type == ZEBRA_ROUTE_CONNECT && | |
c49ad8f1 | 2339 | prefix_match((struct prefix *)p, ifc->address)) |
bce8e868 LF |
2340 | suppress = 1; |
2341 | ||
2342 | if (suppress) | |
718e3744 | 2343 | continue; |
2344 | } | |
2345 | ||
2346 | /* Preparation for route-map. */ | |
2347 | rinfo->metric_set = 0; | |
2348 | rinfo->nexthop_out.s_addr = 0; | |
2349 | rinfo->metric_out = rinfo->metric; | |
16705130 | 2350 | rinfo->tag_out = rinfo->tag; |
c49ad8f1 | 2351 | rinfo->ifindex_out = ifc->ifp->ifindex; |
718e3744 | 2352 | |
16705130 | 2353 | /* In order to avoid some local loops, |
2354 | * if the RIP route has a nexthop via this interface, keep the nexthop, | |
2355 | * otherwise set it to 0. The nexthop should not be propagated | |
2356 | * beyond the local broadcast/multicast area in order | |
2357 | * to avoid an IGP multi-level recursive look-up. | |
2358 | * see (4.4) | |
2359 | */ | |
c49ad8f1 | 2360 | if (rinfo->ifindex == ifc->ifp->ifindex) |
718e3744 | 2361 | rinfo->nexthop_out = rinfo->nexthop; |
16705130 | 2362 | |
2363 | /* Interface route-map */ | |
2364 | if (ri->routemap[RIP_FILTER_OUT]) | |
2365 | { | |
2366 | ret = route_map_apply (ri->routemap[RIP_FILTER_OUT], | |
2367 | (struct prefix *) p, RMAP_RIP, | |
2368 | rinfo); | |
2369 | ||
2370 | if (ret == RMAP_DENYMATCH) | |
2371 | { | |
2372 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2373 | zlog_debug ("RIP %s/%d is filtered by route-map out", |
16705130 | 2374 | inet_ntoa (p->prefix), p->prefixlen); |
2375 | continue; | |
2376 | } | |
2377 | } | |
718e3744 | 2378 | |
16705130 | 2379 | /* Apply redistribute route map - continue, if deny */ |
718e3744 | 2380 | if (rip->route_map[rinfo->type].name |
2381 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) | |
2382 | { | |
2383 | ret = route_map_apply (rip->route_map[rinfo->type].map, | |
2384 | (struct prefix *)p, RMAP_RIP, rinfo); | |
2385 | ||
2386 | if (ret == RMAP_DENYMATCH) | |
2387 | { | |
2388 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2389 | zlog_debug ("%s/%d is filtered by route-map", |
718e3744 | 2390 | inet_ntoa (p->prefix), p->prefixlen); |
2391 | continue; | |
2392 | } | |
2393 | } | |
2394 | ||
2395 | /* When route-map does not set metric. */ | |
2396 | if (! rinfo->metric_set) | |
2397 | { | |
2398 | /* If redistribute metric is set. */ | |
2399 | if (rip->route_map[rinfo->type].metric_config | |
2400 | && rinfo->metric != RIP_METRIC_INFINITY) | |
2401 | { | |
2402 | rinfo->metric_out = rip->route_map[rinfo->type].metric; | |
2403 | } | |
2404 | else | |
2405 | { | |
2406 | /* If the route is not connected or localy generated | |
2407 | one, use default-metric value*/ | |
2408 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
2409 | && rinfo->type != ZEBRA_ROUTE_CONNECT | |
2410 | && rinfo->metric != RIP_METRIC_INFINITY) | |
2411 | rinfo->metric_out = rip->default_metric; | |
2412 | } | |
2413 | } | |
2414 | ||
2415 | /* Apply offset-list */ | |
2416 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
c49ad8f1 | 2417 | rip_offset_list_apply_out (p, ifc->ifp, &rinfo->metric_out); |
718e3744 | 2418 | |
2419 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2420 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
16705130 | 2421 | |
2422 | /* Perform split-horizon with poisoned reverse | |
2423 | * for RIP and connected routes. | |
2424 | **/ | |
2425 | if (ri->split_horizon == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
42d14d98 | 2426 | /* |
2427 | * We perform split horizon for RIP and connected route. | |
2428 | * For rip routes, we want to suppress the route if we would | |
2429 | * end up sending the route back on the interface that we | |
2430 | * learned it from, with a higher metric. For connected routes, | |
2431 | * we suppress the route if the prefix is a subset of the | |
2432 | * source address that we are going to use for the packet | |
2433 | * (in order to handle the case when multiple subnets are | |
2434 | * configured on the same interface). | |
2435 | */ | |
bce8e868 LF |
2436 | struct rip_info *tmp_rinfo = NULL; |
2437 | ||
2438 | for (ALL_LIST_ELEMENTS_RO (list, listnode, tmp_rinfo)) | |
2439 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP && | |
2440 | tmp_rinfo->ifindex == ifc->ifp->ifindex) | |
2441 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2442 | if (tmp_rinfo->type == ZEBRA_ROUTE_CONNECT && | |
c49ad8f1 | 2443 | prefix_match((struct prefix *)p, ifc->address)) |
bce8e868 | 2444 | rinfo->metric_out = RIP_METRIC_INFINITY; |
16705130 | 2445 | } |
b14ee00b | 2446 | |
2447 | /* Prepare preamble, auth headers, if needs be */ | |
2448 | if (num == 0) | |
2449 | { | |
2450 | stream_putc (s, RIP_RESPONSE); | |
2451 | stream_putc (s, version); | |
2452 | stream_putw (s, 0); | |
2453 | ||
0cb8a01c | 2454 | /* auth header for !v1 && !no_auth */ |
2455 | if ( (ri->auth_type != RIP_NO_AUTH) && (version != RIPv1) ) | |
b14ee00b | 2456 | doff = rip_auth_header_write (s, ri, key, auth_str, |
2457 | RIP_AUTH_SIMPLE_SIZE); | |
2458 | } | |
2459 | ||
718e3744 | 2460 | /* Write RTE to the stream. */ |
b14ee00b | 2461 | num = rip_write_rte (num, s, p, version, rinfo); |
718e3744 | 2462 | if (num == rtemax) |
2463 | { | |
2464 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
b14ee00b | 2465 | rip_auth_md5_set (s, ri, doff, auth_str, RIP_AUTH_SIMPLE_SIZE); |
718e3744 | 2466 | |
2467 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), | |
c49ad8f1 | 2468 | to, ifc); |
718e3744 | 2469 | |
2470 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2471 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), | |
2472 | stream_get_endp(s), "SEND"); | |
2473 | num = 0; | |
2474 | stream_reset (s); | |
2475 | } | |
2476 | } | |
2477 | ||
2478 | /* Flush unwritten RTE. */ | |
2479 | if (num != 0) | |
2480 | { | |
2481 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
b14ee00b | 2482 | rip_auth_md5_set (s, ri, doff, auth_str, RIP_AUTH_SIMPLE_SIZE); |
718e3744 | 2483 | |
c49ad8f1 | 2484 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), to, ifc); |
718e3744 | 2485 | |
2486 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2487 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), | |
2488 | stream_get_endp (s), "SEND"); | |
2489 | num = 0; | |
2490 | stream_reset (s); | |
2491 | } | |
2492 | ||
2493 | /* Statistics updates. */ | |
2494 | ri->sent_updates++; | |
2495 | } | |
2496 | ||
2497 | /* Send RIP packet to the interface. */ | |
dc63bfd4 | 2498 | static void |
c49ad8f1 | 2499 | rip_update_interface (struct connected *ifc, u_char version, int route_type) |
718e3744 | 2500 | { |
718e3744 | 2501 | struct sockaddr_in to; |
2502 | ||
2503 | /* When RIP version is 2 and multicast enable interface. */ | |
c49ad8f1 | 2504 | if (version == RIPv2 && if_is_multicast (ifc->ifp)) |
718e3744 | 2505 | { |
2506 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2507 | zlog_debug ("multicast announce on %s ", ifc->ifp->name); |
718e3744 | 2508 | |
c49ad8f1 | 2509 | rip_output_process (ifc, NULL, route_type, version); |
718e3744 | 2510 | return; |
2511 | } | |
c49ad8f1 | 2512 | |
718e3744 | 2513 | /* If we can't send multicast packet, send it with unicast. */ |
c49ad8f1 | 2514 | if (if_is_broadcast (ifc->ifp) || if_is_pointopoint (ifc->ifp)) |
718e3744 | 2515 | { |
c49ad8f1 | 2516 | if (ifc->address->family == AF_INET) |
2517 | { | |
2518 | /* Destination address and port setting. */ | |
2519 | memset (&to, 0, sizeof (struct sockaddr_in)); | |
2520 | if (ifc->destination) | |
e4529636 | 2521 | /* use specified broadcast or peer destination addr */ |
c49ad8f1 | 2522 | to.sin_addr = ifc->destination->u.prefix4; |
e4529636 | 2523 | else if (ifc->address->prefixlen < IPV4_MAX_PREFIXLEN) |
c49ad8f1 | 2524 | /* calculate the appropriate broadcast address */ |
2525 | to.sin_addr.s_addr = | |
2526 | ipv4_broadcast_addr(ifc->address->u.prefix4.s_addr, | |
2527 | ifc->address->prefixlen); | |
e4529636 AS |
2528 | else |
2529 | /* do not know where to send the packet */ | |
2530 | return; | |
c49ad8f1 | 2531 | to.sin_port = htons (RIP_PORT_DEFAULT); |
718e3744 | 2532 | |
c49ad8f1 | 2533 | if (IS_RIP_DEBUG_EVENT) |
e4529636 AS |
2534 | zlog_debug("%s announce to %s on %s", |
2535 | CONNECTED_PEER(ifc) ? "unicast" : "broadcast", | |
2536 | inet_ntoa (to.sin_addr), ifc->ifp->name); | |
718e3744 | 2537 | |
c49ad8f1 | 2538 | rip_output_process (ifc, &to, route_type, version); |
2539 | } | |
718e3744 | 2540 | } |
2541 | } | |
2542 | ||
2543 | /* Update send to all interface and neighbor. */ | |
dc63bfd4 | 2544 | static void |
718e3744 | 2545 | rip_update_process (int route_type) |
2546 | { | |
1eb8ef25 | 2547 | struct listnode *node; |
2548 | struct listnode *ifnode, *ifnnode; | |
cc1131ab | 2549 | struct connected *connected; |
718e3744 | 2550 | struct interface *ifp; |
2551 | struct rip_interface *ri; | |
2552 | struct route_node *rp; | |
2553 | struct sockaddr_in to; | |
bd40c341 | 2554 | struct prefix *p; |
718e3744 | 2555 | |
2556 | /* Send RIP update to each interface. */ | |
b2d7c082 | 2557 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
718e3744 | 2558 | { |
718e3744 | 2559 | if (if_is_loopback (ifp)) |
2560 | continue; | |
2561 | ||
2e3b2e47 | 2562 | if (! if_is_operative (ifp)) |
718e3744 | 2563 | continue; |
2564 | ||
2565 | /* Fetch RIP interface information. */ | |
2566 | ri = ifp->info; | |
2567 | ||
2568 | /* When passive interface is specified, suppress announce to the | |
2569 | interface. */ | |
2570 | if (ri->passive) | |
2571 | continue; | |
2572 | ||
2573 | if (ri->running) | |
2574 | { | |
b9d92881 AS |
2575 | /* |
2576 | * If there is no version configuration in the interface, | |
2577 | * use rip's version setting. | |
2578 | */ | |
2579 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) ? | |
2580 | rip->version_send : ri->ri_send); | |
2581 | ||
718e3744 | 2582 | if (IS_RIP_DEBUG_EVENT) |
b9d92881 | 2583 | zlog_debug("SEND UPDATE to %s ifindex %d", |
85b123a4 | 2584 | ifp->name, ifp->ifindex); |
718e3744 | 2585 | |
cc1131ab | 2586 | /* send update on each connected network */ |
1eb8ef25 | 2587 | for (ALL_LIST_ELEMENTS (ifp->connected, ifnode, ifnnode, connected)) |
cc1131ab | 2588 | { |
b9d92881 AS |
2589 | if (connected->address->family == AF_INET) |
2590 | { | |
2591 | if (vsend & RIPv1) | |
2592 | rip_update_interface (connected, RIPv1, route_type); | |
2593 | if ((vsend & RIPv2) && if_is_multicast(ifp)) | |
2594 | rip_update_interface (connected, RIPv2, route_type); | |
2595 | } | |
2596 | } | |
718e3744 | 2597 | } |
2598 | } | |
2599 | ||
2600 | /* RIP send updates to each neighbor. */ | |
2601 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) | |
2602 | if (rp->info != NULL) | |
2603 | { | |
bd40c341 | 2604 | p = &rp->p; |
718e3744 | 2605 | |
bd40c341 | 2606 | ifp = if_lookup_prefix (p); |
718e3744 | 2607 | if (! ifp) |
2608 | { | |
c49ad8f1 | 2609 | zlog_warn ("Neighbor %s doesnt have connected interface!", |
bd40c341 | 2610 | inet_ntoa (p->u.prefix4)); |
718e3744 | 2611 | continue; |
2612 | } | |
c49ad8f1 | 2613 | |
bd40c341 | 2614 | if ( (connected = connected_lookup_prefix (ifp, p)) == NULL) |
c49ad8f1 | 2615 | { |
2616 | zlog_warn ("Neighbor %s doesnt have connected network", | |
bd40c341 | 2617 | inet_ntoa (p->u.prefix4)); |
c49ad8f1 | 2618 | continue; |
2619 | } | |
2620 | ||
718e3744 | 2621 | /* Set destination address and port */ |
2622 | memset (&to, 0, sizeof (struct sockaddr_in)); | |
bd40c341 | 2623 | to.sin_addr = p->u.prefix4; |
718e3744 | 2624 | to.sin_port = htons (RIP_PORT_DEFAULT); |
2625 | ||
2626 | /* RIP version is rip's configuration. */ | |
c49ad8f1 | 2627 | rip_output_process (connected, &to, route_type, rip->version_send); |
718e3744 | 2628 | } |
2629 | } | |
2630 | ||
2631 | /* RIP's periodical timer. */ | |
dc63bfd4 | 2632 | static int |
718e3744 | 2633 | rip_update (struct thread *t) |
2634 | { | |
2635 | /* Clear timer pointer. */ | |
2636 | rip->t_update = NULL; | |
2637 | ||
2638 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2639 | zlog_debug ("update timer fire!"); |
718e3744 | 2640 | |
2641 | /* Process update output. */ | |
2642 | rip_update_process (rip_all_route); | |
2643 | ||
2644 | /* Triggered updates may be suppressed if a regular update is due by | |
2645 | the time the triggered update would be sent. */ | |
2646 | if (rip->t_triggered_interval) | |
2647 | { | |
2648 | thread_cancel (rip->t_triggered_interval); | |
2649 | rip->t_triggered_interval = NULL; | |
2650 | } | |
2651 | rip->trigger = 0; | |
2652 | ||
2653 | /* Register myself. */ | |
2654 | rip_event (RIP_UPDATE_EVENT, 0); | |
2655 | ||
2656 | return 0; | |
2657 | } | |
2658 | ||
2659 | /* Walk down the RIP routing table then clear changed flag. */ | |
dc63bfd4 | 2660 | static void |
216565ab | 2661 | rip_clear_changed_flag (void) |
718e3744 | 2662 | { |
2663 | struct route_node *rp; | |
bce8e868 LF |
2664 | struct rip_info *rinfo = NULL; |
2665 | struct list *list = NULL; | |
2666 | struct listnode *listnode = NULL; | |
718e3744 | 2667 | |
2668 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
bce8e868 LF |
2669 | if ((list = rp->info) != NULL) |
2670 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
2671 | { | |
2672 | UNSET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
2673 | /* This flag can be set only on the first entry. */ | |
2674 | break; | |
2675 | } | |
718e3744 | 2676 | } |
2677 | ||
2678 | /* Triggered update interval timer. */ | |
dc63bfd4 | 2679 | static int |
718e3744 | 2680 | rip_triggered_interval (struct thread *t) |
2681 | { | |
2682 | int rip_triggered_update (struct thread *); | |
2683 | ||
2684 | rip->t_triggered_interval = NULL; | |
2685 | ||
2686 | if (rip->trigger) | |
2687 | { | |
2688 | rip->trigger = 0; | |
2689 | rip_triggered_update (t); | |
2690 | } | |
2691 | return 0; | |
2692 | } | |
2693 | ||
2694 | /* Execute triggered update. */ | |
dc63bfd4 | 2695 | static int |
718e3744 | 2696 | rip_triggered_update (struct thread *t) |
2697 | { | |
2698 | int interval; | |
2699 | ||
2700 | /* Clear thred pointer. */ | |
2701 | rip->t_triggered_update = NULL; | |
2702 | ||
2703 | /* Cancel interval timer. */ | |
2704 | if (rip->t_triggered_interval) | |
2705 | { | |
2706 | thread_cancel (rip->t_triggered_interval); | |
2707 | rip->t_triggered_interval = NULL; | |
2708 | } | |
2709 | rip->trigger = 0; | |
2710 | ||
2711 | /* Logging triggered update. */ | |
2712 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2713 | zlog_debug ("triggered update!"); |
718e3744 | 2714 | |
2715 | /* Split Horizon processing is done when generating triggered | |
2716 | updates as well as normal updates (see section 2.6). */ | |
2717 | rip_update_process (rip_changed_route); | |
2718 | ||
2719 | /* Once all of the triggered updates have been generated, the route | |
2720 | change flags should be cleared. */ | |
2721 | rip_clear_changed_flag (); | |
2722 | ||
2723 | /* After a triggered update is sent, a timer should be set for a | |
2724 | random interval between 1 and 5 seconds. If other changes that | |
2725 | would trigger updates occur before the timer expires, a single | |
2726 | update is triggered when the timer expires. */ | |
2727 | interval = (random () % 5) + 1; | |
2728 | ||
2729 | rip->t_triggered_interval = | |
2730 | thread_add_timer (master, rip_triggered_interval, NULL, interval); | |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | /* Withdraw redistributed route. */ | |
2736 | void | |
2737 | rip_redistribute_withdraw (int type) | |
2738 | { | |
2739 | struct route_node *rp; | |
bce8e868 LF |
2740 | struct rip_info *rinfo = NULL; |
2741 | struct list *list = NULL; | |
718e3744 | 2742 | |
2743 | if (!rip) | |
2744 | return; | |
2745 | ||
2746 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
bce8e868 | 2747 | if ((list = rp->info) != NULL) |
718e3744 | 2748 | { |
bce8e868 | 2749 | rinfo = listgetdata (listhead (list)); |
718e3744 | 2750 | if (rinfo->type == type |
2751 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) | |
2752 | { | |
2753 | /* Perform poisoned reverse. */ | |
2754 | rinfo->metric = RIP_METRIC_INFINITY; | |
2755 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
2756 | rip_garbage_collect, rip->garbage_time); | |
2757 | RIP_TIMER_OFF (rinfo->t_timeout); | |
2758 | rinfo->flags |= RIP_RTF_CHANGED; | |
2759 | ||
16705130 | 2760 | if (IS_RIP_DEBUG_EVENT) { |
2761 | struct prefix_ipv4 *p = (struct prefix_ipv4 *) &rp->p; | |
2762 | ||
5d6c3779 | 2763 | zlog_debug ("Poisone %s/%d on the interface %s with an infinity metric [withdraw]", |
16705130 | 2764 | inet_ntoa(p->prefix), p->prefixlen, |
2765 | ifindex2ifname(rinfo->ifindex)); | |
2766 | } | |
2767 | ||
718e3744 | 2768 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
2769 | } | |
2770 | } | |
2771 | } | |
2772 | ||
2773 | /* Create new RIP instance and set it to global variable. */ | |
dc63bfd4 | 2774 | static int |
2775 | rip_create (void) | |
718e3744 | 2776 | { |
393deb9b | 2777 | rip = XCALLOC (MTYPE_RIP, sizeof (struct rip)); |
718e3744 | 2778 | |
2779 | /* Set initial value. */ | |
f38a471c | 2780 | rip->version_send = RI_RIP_VERSION_2; |
2781 | rip->version_recv = RI_RIP_VERSION_1_AND_2; | |
718e3744 | 2782 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; |
2783 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; | |
2784 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; | |
2785 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; | |
2786 | ||
2787 | /* Initialize RIP routig table. */ | |
2788 | rip->table = route_table_init (); | |
2789 | rip->route = route_table_init (); | |
2790 | rip->neighbor = route_table_init (); | |
2791 | ||
2792 | /* Make output stream. */ | |
2793 | rip->obuf = stream_new (1500); | |
2794 | ||
2795 | /* Make socket. */ | |
f69bd9da | 2796 | rip->sock = rip_create_socket (NULL); |
718e3744 | 2797 | if (rip->sock < 0) |
2798 | return rip->sock; | |
2799 | ||
2800 | /* Create read and timer thread. */ | |
2801 | rip_event (RIP_READ, rip->sock); | |
2802 | rip_event (RIP_UPDATE_EVENT, 1); | |
2803 | ||
2804 | return 0; | |
2805 | } | |
2806 | ||
2807 | /* Sned RIP request to the destination. */ | |
2808 | int | |
2809 | rip_request_send (struct sockaddr_in *to, struct interface *ifp, | |
931cd54d | 2810 | u_char version, struct connected *connected) |
718e3744 | 2811 | { |
2812 | struct rte *rte; | |
2813 | struct rip_packet rip_packet; | |
1eb8ef25 | 2814 | struct listnode *node, *nnode; |
718e3744 | 2815 | |
2816 | memset (&rip_packet, 0, sizeof (rip_packet)); | |
2817 | ||
2818 | rip_packet.command = RIP_REQUEST; | |
2819 | rip_packet.version = version; | |
2820 | rte = rip_packet.rte; | |
2821 | rte->metric = htonl (RIP_METRIC_INFINITY); | |
2822 | ||
931cd54d | 2823 | if (connected) |
2824 | { | |
2825 | /* | |
2826 | * connected is only sent for ripv1 case, or when | |
2827 | * interface does not support multicast. Caller loops | |
2828 | * over each connected address for this case. | |
2829 | */ | |
11dde9c2 | 2830 | if (rip_send_packet ((u_char *) &rip_packet, sizeof (rip_packet), |
c49ad8f1 | 2831 | to, connected) != sizeof (rip_packet)) |
931cd54d | 2832 | return -1; |
2833 | else | |
2834 | return sizeof (rip_packet); | |
2835 | } | |
2836 | ||
cc1131ab | 2837 | /* send request on each connected network */ |
1eb8ef25 | 2838 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, connected)) |
cc1131ab | 2839 | { |
2840 | struct prefix_ipv4 *p; | |
2841 | ||
2842 | p = (struct prefix_ipv4 *) connected->address; | |
2843 | ||
2844 | if (p->family != AF_INET) | |
2845 | continue; | |
2846 | ||
11dde9c2 | 2847 | if (rip_send_packet ((u_char *) &rip_packet, sizeof (rip_packet), |
c49ad8f1 | 2848 | to, connected) != sizeof (rip_packet)) |
cc1131ab | 2849 | return -1; |
2850 | } | |
2851 | return sizeof (rip_packet); | |
718e3744 | 2852 | } |
6b0655a2 | 2853 | |
dc63bfd4 | 2854 | static int |
718e3744 | 2855 | rip_update_jitter (unsigned long time) |
2856 | { | |
239389ba | 2857 | #define JITTER_BOUND 4 |
2858 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. | |
2859 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2860 | The RIPv2 RFC says jitter should be small compared to | |
2861 | update_time. We consider 1/JITTER_BOUND to be small. | |
2862 | */ | |
2863 | ||
2864 | int jitter_input = time; | |
2865 | int jitter; | |
2866 | ||
2867 | if (jitter_input < JITTER_BOUND) | |
2868 | jitter_input = JITTER_BOUND; | |
2869 | ||
b06fd125 | 2870 | jitter = (((random () % ((jitter_input * 2) + 1)) - jitter_input)); |
239389ba | 2871 | |
2872 | return jitter/JITTER_BOUND; | |
718e3744 | 2873 | } |
2874 | ||
2875 | void | |
2876 | rip_event (enum rip_event event, int sock) | |
2877 | { | |
2878 | int jitter = 0; | |
2879 | ||
2880 | switch (event) | |
2881 | { | |
2882 | case RIP_READ: | |
2883 | rip->t_read = thread_add_read (master, rip_read, NULL, sock); | |
2884 | break; | |
2885 | case RIP_UPDATE_EVENT: | |
2886 | if (rip->t_update) | |
2887 | { | |
2888 | thread_cancel (rip->t_update); | |
2889 | rip->t_update = NULL; | |
2890 | } | |
2891 | jitter = rip_update_jitter (rip->update_time); | |
2892 | rip->t_update = | |
2893 | thread_add_timer (master, rip_update, NULL, | |
2894 | sock ? 2 : rip->update_time + jitter); | |
2895 | break; | |
2896 | case RIP_TRIGGERED_UPDATE: | |
2897 | if (rip->t_triggered_interval) | |
2898 | rip->trigger = 1; | |
2899 | else if (! rip->t_triggered_update) | |
2900 | rip->t_triggered_update = | |
2901 | thread_add_event (master, rip_triggered_update, NULL, 0); | |
2902 | break; | |
2903 | default: | |
2904 | break; | |
2905 | } | |
2906 | } | |
6b0655a2 | 2907 | |
718e3744 | 2908 | DEFUN (router_rip, |
2909 | router_rip_cmd, | |
2910 | "router rip", | |
2911 | "Enable a routing process\n" | |
2912 | "Routing Information Protocol (RIP)\n") | |
2913 | { | |
2914 | int ret; | |
2915 | ||
2916 | /* If rip is not enabled before. */ | |
2917 | if (! rip) | |
2918 | { | |
2919 | ret = rip_create (); | |
2920 | if (ret < 0) | |
2921 | { | |
2922 | zlog_info ("Can't create RIP"); | |
2923 | return CMD_WARNING; | |
2924 | } | |
2925 | } | |
2926 | vty->node = RIP_NODE; | |
2927 | vty->index = rip; | |
2928 | ||
2929 | return CMD_SUCCESS; | |
2930 | } | |
2931 | ||
2932 | DEFUN (no_router_rip, | |
2933 | no_router_rip_cmd, | |
2934 | "no router rip", | |
2935 | NO_STR | |
2936 | "Enable a routing process\n" | |
2937 | "Routing Information Protocol (RIP)\n") | |
2938 | { | |
2939 | if (rip) | |
2940 | rip_clean (); | |
2941 | return CMD_SUCCESS; | |
2942 | } | |
2943 | ||
2944 | DEFUN (rip_version, | |
2945 | rip_version_cmd, | |
6147e2c6 | 2946 | "version (1-2)", |
718e3744 | 2947 | "Set routing protocol version\n" |
2948 | "version\n") | |
2949 | { | |
2950 | int version; | |
2951 | ||
558e4c28 | 2952 | version = atoi (argv[1]->arg); |
718e3744 | 2953 | if (version != RIPv1 && version != RIPv2) |
2954 | { | |
2955 | vty_out (vty, "invalid rip version %d%s", version, | |
2956 | VTY_NEWLINE); | |
2957 | return CMD_WARNING; | |
2958 | } | |
f38a471c | 2959 | rip->version_send = version; |
2960 | rip->version_recv = version; | |
718e3744 | 2961 | |
2962 | return CMD_SUCCESS; | |
2963 | } | |
2964 | ||
f412b39a DW |
2965 | /* |
2966 | * CHECK ME - The following ALIASes need to be implemented in this DEFUN | |
2967 | * "no version <1-2>", | |
2968 | * NO_STR | |
2969 | * "Set routing protocol version\n" | |
2970 | * "version\n" | |
2971 | * | |
2972 | */ | |
718e3744 | 2973 | DEFUN (no_rip_version, |
2974 | no_rip_version_cmd, | |
2975 | "no version", | |
2976 | NO_STR | |
2977 | "Set routing protocol version\n") | |
2978 | { | |
2979 | /* Set RIP version to the default. */ | |
f38a471c | 2980 | rip->version_send = RI_RIP_VERSION_2; |
2981 | rip->version_recv = RI_RIP_VERSION_1_AND_2; | |
718e3744 | 2982 | |
2983 | return CMD_SUCCESS; | |
2984 | } | |
2985 | ||
718e3744 | 2986 | |
2987 | DEFUN (rip_route, | |
2988 | rip_route_cmd, | |
2989 | "route A.B.C.D/M", | |
2990 | "RIP static route configuration\n" | |
2991 | "IP prefix <network>/<length>\n") | |
2992 | { | |
2993 | int ret; | |
2994 | struct prefix_ipv4 p; | |
2995 | struct route_node *node; | |
2996 | ||
558e4c28 | 2997 | ret = str2prefix_ipv4 (argv[1]->arg, &p); |
718e3744 | 2998 | if (ret < 0) |
2999 | { | |
3000 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); | |
3001 | return CMD_WARNING; | |
3002 | } | |
3003 | apply_mask_ipv4 (&p); | |
3004 | ||
3005 | /* For router rip configuration. */ | |
3006 | node = route_node_get (rip->route, (struct prefix *) &p); | |
3007 | ||
3008 | if (node->info) | |
3009 | { | |
3010 | vty_out (vty, "There is already same static route.%s", VTY_NEWLINE); | |
3011 | route_unlock_node (node); | |
3012 | return CMD_WARNING; | |
3013 | } | |
3014 | ||
e5f745ca | 3015 | node->info = (void *)1; |
718e3744 | 3016 | |
fbf5d033 | 3017 | rip_redistribute_add (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0, NULL, 0, 0); |
718e3744 | 3018 | |
3019 | return CMD_SUCCESS; | |
3020 | } | |
3021 | ||
3022 | DEFUN (no_rip_route, | |
3023 | no_rip_route_cmd, | |
3024 | "no route A.B.C.D/M", | |
3025 | NO_STR | |
3026 | "RIP static route configuration\n" | |
3027 | "IP prefix <network>/<length>\n") | |
3028 | { | |
3029 | int ret; | |
3030 | struct prefix_ipv4 p; | |
3031 | struct route_node *node; | |
3032 | ||
558e4c28 | 3033 | ret = str2prefix_ipv4 (argv[2]->arg, &p); |
718e3744 | 3034 | if (ret < 0) |
3035 | { | |
3036 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); | |
3037 | return CMD_WARNING; | |
3038 | } | |
3039 | apply_mask_ipv4 (&p); | |
3040 | ||
3041 | /* For router rip configuration. */ | |
3042 | node = route_node_lookup (rip->route, (struct prefix *) &p); | |
3043 | if (! node) | |
3044 | { | |
558e4c28 | 3045 | vty_out (vty, "Can't find route %s.%s", argv[2]->arg, |
718e3744 | 3046 | VTY_NEWLINE); |
3047 | return CMD_WARNING; | |
3048 | } | |
3049 | ||
3050 | rip_redistribute_delete (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0); | |
3051 | route_unlock_node (node); | |
3052 | ||
3053 | node->info = NULL; | |
3054 | route_unlock_node (node); | |
3055 | ||
3056 | return CMD_SUCCESS; | |
3057 | } | |
3058 | ||
2c239705 | 3059 | #if 0 |
dc63bfd4 | 3060 | static void |
216565ab | 3061 | rip_update_default_metric (void) |
718e3744 | 3062 | { |
3063 | struct route_node *np; | |
bce8e868 LF |
3064 | struct rip_info *rinfo = NULL; |
3065 | struct list *list = NULL; | |
3066 | struct listnode *listnode = NULL; | |
718e3744 | 3067 | |
3068 | for (np = route_top (rip->table); np; np = route_next (np)) | |
bce8e868 LF |
3069 | if ((list = np->info) != NULL) |
3070 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
3071 | if (rinfo->type != ZEBRA_ROUTE_RIP && rinfo->type != ZEBRA_ROUTE_CONNECT) | |
3072 | rinfo->metric = rip->default_metric; | |
718e3744 | 3073 | } |
2c239705 | 3074 | #endif |
718e3744 | 3075 | |
3076 | DEFUN (rip_default_metric, | |
3077 | rip_default_metric_cmd, | |
6147e2c6 | 3078 | "default-metric (1-16)", |
718e3744 | 3079 | "Set a metric of redistribute routes\n" |
3080 | "Default metric\n") | |
3081 | { | |
3082 | if (rip) | |
3083 | { | |
558e4c28 | 3084 | rip->default_metric = atoi (argv[1]->arg); |
718e3744 | 3085 | /* rip_update_default_metric (); */ |
3086 | } | |
3087 | return CMD_SUCCESS; | |
3088 | } | |
3089 | ||
f412b39a DW |
3090 | /* |
3091 | * CHECK ME - The following ALIASes need to be implemented in this DEFUN | |
3092 | * "no default-metric <1-16>", | |
3093 | * NO_STR | |
3094 | * "Set a metric of redistribute routes\n" | |
3095 | * "Default metric\n" | |
3096 | * | |
3097 | */ | |
718e3744 | 3098 | DEFUN (no_rip_default_metric, |
3099 | no_rip_default_metric_cmd, | |
3100 | "no default-metric", | |
3101 | NO_STR | |
3102 | "Set a metric of redistribute routes\n" | |
3103 | "Default metric\n") | |
3104 | { | |
3105 | if (rip) | |
3106 | { | |
3107 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; | |
3108 | /* rip_update_default_metric (); */ | |
3109 | } | |
3110 | return CMD_SUCCESS; | |
3111 | } | |
3112 | ||
718e3744 | 3113 | |
3114 | DEFUN (rip_timers, | |
3115 | rip_timers_cmd, | |
6147e2c6 | 3116 | "timers basic (5-2147483647) (5-2147483647) (5-2147483647)", |
718e3744 | 3117 | "Adjust routing timers\n" |
3118 | "Basic routing protocol update timers\n" | |
3119 | "Routing table update timer value in second. Default is 30.\n" | |
3120 | "Routing information timeout timer. Default is 180.\n" | |
3121 | "Garbage collection timer. Default is 120.\n") | |
3122 | { | |
3123 | unsigned long update; | |
3124 | unsigned long timeout; | |
3125 | unsigned long garbage; | |
3126 | char *endptr = NULL; | |
3127 | unsigned long RIP_TIMER_MAX = 2147483647; | |
3128 | unsigned long RIP_TIMER_MIN = 5; | |
3129 | ||
558e4c28 | 3130 | update = strtoul (argv[2]->arg, &endptr, 10); |
718e3744 | 3131 | if (update > RIP_TIMER_MAX || update < RIP_TIMER_MIN || *endptr != '\0') |
3132 | { | |
3133 | vty_out (vty, "update timer value error%s", VTY_NEWLINE); | |
3134 | return CMD_WARNING; | |
3135 | } | |
3136 | ||
558e4c28 | 3137 | timeout = strtoul (argv[3]->arg, &endptr, 10); |
718e3744 | 3138 | if (timeout > RIP_TIMER_MAX || timeout < RIP_TIMER_MIN || *endptr != '\0') |
3139 | { | |
3140 | vty_out (vty, "timeout timer value error%s", VTY_NEWLINE); | |
3141 | return CMD_WARNING; | |
3142 | } | |
3143 | ||
558e4c28 | 3144 | garbage = strtoul (argv[4]->arg, &endptr, 10); |
718e3744 | 3145 | if (garbage > RIP_TIMER_MAX || garbage < RIP_TIMER_MIN || *endptr != '\0') |
3146 | { | |
3147 | vty_out (vty, "garbage timer value error%s", VTY_NEWLINE); | |
3148 | return CMD_WARNING; | |
3149 | } | |
3150 | ||
3151 | /* Set each timer value. */ | |
3152 | rip->update_time = update; | |
3153 | rip->timeout_time = timeout; | |
3154 | rip->garbage_time = garbage; | |
3155 | ||
3156 | /* Reset update timer thread. */ | |
3157 | rip_event (RIP_UPDATE_EVENT, 0); | |
3158 | ||
3159 | return CMD_SUCCESS; | |
3160 | } | |
3161 | ||
f412b39a DW |
3162 | /* |
3163 | * CHECK ME - The following ALIASes need to be implemented in this DEFUN | |
3164 | * "no timers basic <0-65535> <0-65535> <0-65535>", | |
3165 | * NO_STR | |
3166 | * "Adjust routing timers\n" | |
3167 | * "Basic routing protocol update timers\n" | |
3168 | * "Routing table update timer value in second. Default is 30.\n" | |
3169 | * "Routing information timeout timer. Default is 180.\n" | |
3170 | * "Garbage collection timer. Default is 120.\n" | |
3171 | * | |
3172 | */ | |
718e3744 | 3173 | DEFUN (no_rip_timers, |
3174 | no_rip_timers_cmd, | |
3175 | "no timers basic", | |
3176 | NO_STR | |
3177 | "Adjust routing timers\n" | |
3178 | "Basic routing protocol update timers\n") | |
3179 | { | |
3180 | /* Set each timer value to the default. */ | |
3181 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; | |
3182 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; | |
3183 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; | |
3184 | ||
3185 | /* Reset update timer thread. */ | |
3186 | rip_event (RIP_UPDATE_EVENT, 0); | |
3187 | ||
3188 | return CMD_SUCCESS; | |
3189 | } | |
16705130 | 3190 | |
16705130 | 3191 | |
6b0655a2 | 3192 | |
718e3744 | 3193 | struct route_table *rip_distance_table; |
3194 | ||
3195 | struct rip_distance | |
3196 | { | |
3197 | /* Distance value for the IP source prefix. */ | |
3198 | u_char distance; | |
3199 | ||
3200 | /* Name of the access-list to be matched. */ | |
3201 | char *access_list; | |
3202 | }; | |
3203 | ||
dc63bfd4 | 3204 | static struct rip_distance * |
216565ab | 3205 | rip_distance_new (void) |
718e3744 | 3206 | { |
393deb9b | 3207 | return XCALLOC (MTYPE_RIP_DISTANCE, sizeof (struct rip_distance)); |
718e3744 | 3208 | } |
3209 | ||
dc63bfd4 | 3210 | static void |
718e3744 | 3211 | rip_distance_free (struct rip_distance *rdistance) |
3212 | { | |
3213 | XFREE (MTYPE_RIP_DISTANCE, rdistance); | |
3214 | } | |
3215 | ||
dc63bfd4 | 3216 | static int |
98b718a9 | 3217 | rip_distance_set (struct vty *vty, const char *distance_str, const char *ip_str, |
3218 | const char *access_list_str) | |
718e3744 | 3219 | { |
3220 | int ret; | |
3221 | struct prefix_ipv4 p; | |
3222 | u_char distance; | |
3223 | struct route_node *rn; | |
3224 | struct rip_distance *rdistance; | |
3225 | ||
3226 | ret = str2prefix_ipv4 (ip_str, &p); | |
3227 | if (ret == 0) | |
3228 | { | |
3229 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); | |
3230 | return CMD_WARNING; | |
3231 | } | |
3232 | ||
3233 | distance = atoi (distance_str); | |
3234 | ||
3235 | /* Get RIP distance node. */ | |
3236 | rn = route_node_get (rip_distance_table, (struct prefix *) &p); | |
3237 | if (rn->info) | |
3238 | { | |
3239 | rdistance = rn->info; | |
3240 | route_unlock_node (rn); | |
3241 | } | |
3242 | else | |
3243 | { | |
3244 | rdistance = rip_distance_new (); | |
3245 | rn->info = rdistance; | |
3246 | } | |
3247 | ||
3248 | /* Set distance value. */ | |
3249 | rdistance->distance = distance; | |
3250 | ||
3251 | /* Reset access-list configuration. */ | |
3252 | if (rdistance->access_list) | |
3253 | { | |
3254 | free (rdistance->access_list); | |
3255 | rdistance->access_list = NULL; | |
3256 | } | |
3257 | if (access_list_str) | |
3258 | rdistance->access_list = strdup (access_list_str); | |
3259 | ||
3260 | return CMD_SUCCESS; | |
3261 | } | |
3262 | ||
dc63bfd4 | 3263 | static int |
98b718a9 | 3264 | rip_distance_unset (struct vty *vty, const char *distance_str, |
3265 | const char *ip_str, const char *access_list_str) | |
718e3744 | 3266 | { |
3267 | int ret; | |
3268 | struct prefix_ipv4 p; | |
718e3744 | 3269 | struct route_node *rn; |
3270 | struct rip_distance *rdistance; | |
3271 | ||
3272 | ret = str2prefix_ipv4 (ip_str, &p); | |
3273 | if (ret == 0) | |
3274 | { | |
3275 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); | |
3276 | return CMD_WARNING; | |
3277 | } | |
3278 | ||
718e3744 | 3279 | rn = route_node_lookup (rip_distance_table, (struct prefix *)&p); |
3280 | if (! rn) | |
3281 | { | |
3282 | vty_out (vty, "Can't find specified prefix%s", VTY_NEWLINE); | |
3283 | return CMD_WARNING; | |
3284 | } | |
3285 | ||
3286 | rdistance = rn->info; | |
3287 | ||
3288 | if (rdistance->access_list) | |
3289 | free (rdistance->access_list); | |
3290 | rip_distance_free (rdistance); | |
3291 | ||
3292 | rn->info = NULL; | |
3293 | route_unlock_node (rn); | |
3294 | route_unlock_node (rn); | |
3295 | ||
3296 | return CMD_SUCCESS; | |
3297 | } | |
3298 | ||
dc63bfd4 | 3299 | static void |
216565ab | 3300 | rip_distance_reset (void) |
718e3744 | 3301 | { |
3302 | struct route_node *rn; | |
3303 | struct rip_distance *rdistance; | |
3304 | ||
3305 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3306 | if ((rdistance = rn->info) != NULL) | |
3307 | { | |
3308 | if (rdistance->access_list) | |
3309 | free (rdistance->access_list); | |
3310 | rip_distance_free (rdistance); | |
3311 | rn->info = NULL; | |
3312 | route_unlock_node (rn); | |
3313 | } | |
3314 | } | |
3315 | ||
3316 | /* Apply RIP information to distance method. */ | |
3317 | u_char | |
3318 | rip_distance_apply (struct rip_info *rinfo) | |
3319 | { | |
3320 | struct route_node *rn; | |
3321 | struct prefix_ipv4 p; | |
3322 | struct rip_distance *rdistance; | |
3323 | struct access_list *alist; | |
3324 | ||
3325 | if (! rip) | |
3326 | return 0; | |
3327 | ||
3328 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
3329 | p.family = AF_INET; | |
3330 | p.prefix = rinfo->from; | |
3331 | p.prefixlen = IPV4_MAX_BITLEN; | |
3332 | ||
3333 | /* Check source address. */ | |
3334 | rn = route_node_match (rip_distance_table, (struct prefix *) &p); | |
3335 | if (rn) | |
3336 | { | |
3337 | rdistance = rn->info; | |
3338 | route_unlock_node (rn); | |
3339 | ||
3340 | if (rdistance->access_list) | |
3341 | { | |
3342 | alist = access_list_lookup (AFI_IP, rdistance->access_list); | |
3343 | if (alist == NULL) | |
3344 | return 0; | |
3345 | if (access_list_apply (alist, &rinfo->rp->p) == FILTER_DENY) | |
3346 | return 0; | |
3347 | ||
3348 | return rdistance->distance; | |
3349 | } | |
3350 | else | |
3351 | return rdistance->distance; | |
3352 | } | |
3353 | ||
3354 | if (rip->distance) | |
3355 | return rip->distance; | |
3356 | ||
3357 | return 0; | |
3358 | } | |
3359 | ||
dc63bfd4 | 3360 | static void |
718e3744 | 3361 | rip_distance_show (struct vty *vty) |
3362 | { | |
3363 | struct route_node *rn; | |
3364 | struct rip_distance *rdistance; | |
3365 | int header = 1; | |
3366 | char buf[BUFSIZ]; | |
3367 | ||
3368 | vty_out (vty, " Distance: (default is %d)%s", | |
3369 | rip->distance ? rip->distance :ZEBRA_RIP_DISTANCE_DEFAULT, | |
3370 | VTY_NEWLINE); | |
3371 | ||
3372 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3373 | if ((rdistance = rn->info) != NULL) | |
3374 | { | |
3375 | if (header) | |
3376 | { | |
3377 | vty_out (vty, " Address Distance List%s", | |
3378 | VTY_NEWLINE); | |
3379 | header = 0; | |
3380 | } | |
3381 | sprintf (buf, "%s/%d", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen); | |
3382 | vty_out (vty, " %-20s %4d %s%s", | |
3383 | buf, rdistance->distance, | |
3384 | rdistance->access_list ? rdistance->access_list : "", | |
3385 | VTY_NEWLINE); | |
3386 | } | |
3387 | } | |
3388 | ||
3389 | DEFUN (rip_distance, | |
3390 | rip_distance_cmd, | |
6147e2c6 | 3391 | "distance (1-255)", |
718e3744 | 3392 | "Administrative distance\n" |
3393 | "Distance value\n") | |
3394 | { | |
558e4c28 | 3395 | rip->distance = atoi (argv[1]->arg); |
718e3744 | 3396 | return CMD_SUCCESS; |
3397 | } | |
3398 | ||
3399 | DEFUN (no_rip_distance, | |
3400 | no_rip_distance_cmd, | |
6147e2c6 | 3401 | "no distance (1-255)", |
718e3744 | 3402 | NO_STR |
3403 | "Administrative distance\n" | |
3404 | "Distance value\n") | |
3405 | { | |
3406 | rip->distance = 0; | |
3407 | return CMD_SUCCESS; | |
3408 | } | |
3409 | ||
3410 | DEFUN (rip_distance_source, | |
3411 | rip_distance_source_cmd, | |
6147e2c6 | 3412 | "distance (1-255) A.B.C.D/M", |
718e3744 | 3413 | "Administrative distance\n" |
3414 | "Distance value\n" | |
3415 | "IP source prefix\n") | |
3416 | { | |
558e4c28 | 3417 | rip_distance_set (vty, argv[1]->arg, argv[2]->arg, NULL); |
718e3744 | 3418 | return CMD_SUCCESS; |
3419 | } | |
3420 | ||
3421 | DEFUN (no_rip_distance_source, | |
3422 | no_rip_distance_source_cmd, | |
6147e2c6 | 3423 | "no distance (1-255) A.B.C.D/M", |
718e3744 | 3424 | NO_STR |
3425 | "Administrative distance\n" | |
3426 | "Distance value\n" | |
3427 | "IP source prefix\n") | |
3428 | { | |
558e4c28 | 3429 | rip_distance_unset (vty, argv[2]->arg, argv[3]->arg, NULL); |
718e3744 | 3430 | return CMD_SUCCESS; |
3431 | } | |
3432 | ||
3433 | DEFUN (rip_distance_source_access_list, | |
3434 | rip_distance_source_access_list_cmd, | |
6147e2c6 | 3435 | "distance (1-255) A.B.C.D/M WORD", |
718e3744 | 3436 | "Administrative distance\n" |
3437 | "Distance value\n" | |
3438 | "IP source prefix\n" | |
3439 | "Access list name\n") | |
3440 | { | |
558e4c28 | 3441 | rip_distance_set (vty, argv[1]->arg, argv[2]->arg, argv[3]->arg); |
718e3744 | 3442 | return CMD_SUCCESS; |
3443 | } | |
3444 | ||
3445 | DEFUN (no_rip_distance_source_access_list, | |
3446 | no_rip_distance_source_access_list_cmd, | |
6147e2c6 | 3447 | "no distance (1-255) A.B.C.D/M WORD", |
718e3744 | 3448 | NO_STR |
3449 | "Administrative distance\n" | |
3450 | "Distance value\n" | |
3451 | "IP source prefix\n" | |
3452 | "Access list name\n") | |
3453 | { | |
558e4c28 | 3454 | rip_distance_unset (vty, argv[2]->arg, argv[3]->arg, argv[4]->arg); |
718e3744 | 3455 | return CMD_SUCCESS; |
3456 | } | |
6b0655a2 | 3457 | |
8478ae7e LF |
3458 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
3459 | static void | |
3460 | rip_ecmp_disable (void) | |
3461 | { | |
3462 | struct route_node *rp; | |
3463 | struct rip_info *rinfo, *tmp_rinfo; | |
3464 | struct list *list; | |
3465 | struct listnode *node, *nextnode; | |
3466 | ||
3467 | if (!rip) | |
3468 | return; | |
3469 | ||
3470 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
3471 | if ((list = rp->info) != NULL && listcount (list) > 1) | |
3472 | { | |
3473 | rinfo = listgetdata (listhead (list)); | |
3474 | if (!rip_route_rte (rinfo)) | |
3475 | continue; | |
3476 | ||
3477 | /* Drop all other entries, except the first one. */ | |
3478 | for (ALL_LIST_ELEMENTS (list, node, nextnode, tmp_rinfo)) | |
3479 | if (tmp_rinfo != rinfo) | |
3480 | { | |
3481 | RIP_TIMER_OFF (tmp_rinfo->t_timeout); | |
3482 | RIP_TIMER_OFF (tmp_rinfo->t_garbage_collect); | |
3483 | list_delete_node (list, node); | |
3484 | rip_info_free (tmp_rinfo); | |
3485 | } | |
3486 | ||
3487 | /* Update zebra. */ | |
3488 | rip_zebra_ipv4_add (rp); | |
3489 | ||
3490 | /* Set the route change flag. */ | |
3491 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
3492 | ||
3493 | /* Signal the output process to trigger an update. */ | |
3494 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
3495 | } | |
3496 | } | |
3497 | ||
3498 | DEFUN (rip_allow_ecmp, | |
3499 | rip_allow_ecmp_cmd, | |
3500 | "allow-ecmp", | |
3501 | "Allow Equal Cost MultiPath\n") | |
3502 | { | |
3503 | if (rip->ecmp) | |
3504 | { | |
3505 | vty_out (vty, "ECMP is already enabled.%s", VTY_NEWLINE); | |
3506 | return CMD_WARNING; | |
3507 | } | |
3508 | ||
3509 | rip->ecmp = 1; | |
3510 | zlog_info ("ECMP is enabled."); | |
3511 | return CMD_SUCCESS; | |
3512 | } | |
3513 | ||
3514 | DEFUN (no_rip_allow_ecmp, | |
3515 | no_rip_allow_ecmp_cmd, | |
3516 | "no allow-ecmp", | |
3517 | NO_STR | |
3518 | "Allow Equal Cost MultiPath\n") | |
3519 | { | |
3520 | if (!rip->ecmp) | |
3521 | { | |
3522 | vty_out (vty, "ECMP is already disabled.%s", VTY_NEWLINE); | |
3523 | return CMD_WARNING; | |
3524 | } | |
3525 | ||
3526 | rip->ecmp = 0; | |
3527 | zlog_info ("ECMP is disabled."); | |
3528 | rip_ecmp_disable (); | |
3529 | return CMD_SUCCESS; | |
3530 | } | |
3531 | ||
718e3744 | 3532 | /* Print out routes update time. */ |
dc63bfd4 | 3533 | static void |
718e3744 | 3534 | rip_vty_out_uptime (struct vty *vty, struct rip_info *rinfo) |
3535 | { | |
718e3744 | 3536 | time_t clock; |
3537 | struct tm *tm; | |
3538 | #define TIME_BUF 25 | |
3539 | char timebuf [TIME_BUF]; | |
3540 | struct thread *thread; | |
3541 | ||
718e3744 | 3542 | if ((thread = rinfo->t_timeout) != NULL) |
3543 | { | |
a1fdf947 | 3544 | clock = thread_timer_remain_second (thread); |
718e3744 | 3545 | tm = gmtime (&clock); |
3546 | strftime (timebuf, TIME_BUF, "%M:%S", tm); | |
3547 | vty_out (vty, "%5s", timebuf); | |
3548 | } | |
3549 | else if ((thread = rinfo->t_garbage_collect) != NULL) | |
3550 | { | |
a1fdf947 | 3551 | clock = thread_timer_remain_second (thread); |
718e3744 | 3552 | tm = gmtime (&clock); |
3553 | strftime (timebuf, TIME_BUF, "%M:%S", tm); | |
3554 | vty_out (vty, "%5s", timebuf); | |
3555 | } | |
3556 | } | |
3557 | ||
dc63bfd4 | 3558 | static const char * |
718e3744 | 3559 | rip_route_type_print (int sub_type) |
3560 | { | |
3561 | switch (sub_type) | |
3562 | { | |
3563 | case RIP_ROUTE_RTE: | |
3564 | return "n"; | |
3565 | case RIP_ROUTE_STATIC: | |
3566 | return "s"; | |
3567 | case RIP_ROUTE_DEFAULT: | |
3568 | return "d"; | |
3569 | case RIP_ROUTE_REDISTRIBUTE: | |
3570 | return "r"; | |
3571 | case RIP_ROUTE_INTERFACE: | |
3572 | return "i"; | |
3573 | default: | |
3574 | return "?"; | |
3575 | } | |
3576 | } | |
3577 | ||
3578 | DEFUN (show_ip_rip, | |
3579 | show_ip_rip_cmd, | |
3580 | "show ip rip", | |
3581 | SHOW_STR | |
3582 | IP_STR | |
3583 | "Show RIP routes\n") | |
3584 | { | |
3585 | struct route_node *np; | |
bce8e868 LF |
3586 | struct rip_info *rinfo = NULL; |
3587 | struct list *list = NULL; | |
3588 | struct listnode *listnode = NULL; | |
718e3744 | 3589 | |
3590 | if (! rip) | |
3591 | return CMD_SUCCESS; | |
3592 | ||
16705130 | 3593 | vty_out (vty, "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP%s" |
3594 | "Sub-codes:%s" | |
3595 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,%s" | |
718e3744 | 3596 | " (i) - interface%s%s" |
a1455d86 | 3597 | " Network Next Hop Metric From Tag Time%s", |
16705130 | 3598 | VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE); |
718e3744 | 3599 | |
3600 | for (np = route_top (rip->table); np; np = route_next (np)) | |
bce8e868 LF |
3601 | if ((list = np->info) != NULL) |
3602 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
718e3744 | 3603 | { |
3604 | int len; | |
3605 | ||
f52d13cb | 3606 | len = vty_out (vty, "%c(%s) %s/%d", |
718e3744 | 3607 | /* np->lock, For debugging. */ |
f52d13cb | 3608 | zebra_route_char(rinfo->type), |
718e3744 | 3609 | rip_route_type_print (rinfo->sub_type), |
3610 | inet_ntoa (np->p.u.prefix4), np->p.prefixlen); | |
3611 | ||
a1455d86 | 3612 | len = 24 - len; |
718e3744 | 3613 | |
3614 | if (len > 0) | |
3615 | vty_out (vty, "%*s", len, " "); | |
3616 | ||
3617 | if (rinfo->nexthop.s_addr) | |
3618 | vty_out (vty, "%-20s %2d ", inet_ntoa (rinfo->nexthop), | |
3619 | rinfo->metric); | |
3620 | else | |
3621 | vty_out (vty, "0.0.0.0 %2d ", rinfo->metric); | |
3622 | ||
3623 | /* Route which exist in kernel routing table. */ | |
3624 | if ((rinfo->type == ZEBRA_ROUTE_RIP) && | |
3625 | (rinfo->sub_type == RIP_ROUTE_RTE)) | |
3626 | { | |
3627 | vty_out (vty, "%-15s ", inet_ntoa (rinfo->from)); | |
16705130 | 3628 | vty_out (vty, "%3d ", rinfo->tag); |
718e3744 | 3629 | rip_vty_out_uptime (vty, rinfo); |
3630 | } | |
3631 | else if (rinfo->metric == RIP_METRIC_INFINITY) | |
3632 | { | |
3633 | vty_out (vty, "self "); | |
16705130 | 3634 | vty_out (vty, "%3d ", rinfo->tag); |
718e3744 | 3635 | rip_vty_out_uptime (vty, rinfo); |
3636 | } | |
3637 | else | |
16705130 | 3638 | { |
fbf5d033 | 3639 | if (rinfo->external_metric) |
3640 | { | |
3641 | len = vty_out (vty, "self (%s:%d)", | |
f52d13cb | 3642 | zebra_route_string(rinfo->type), |
fbf5d033 | 3643 | rinfo->external_metric); |
3644 | len = 16 - len; | |
3645 | if (len > 0) | |
3646 | vty_out (vty, "%*s", len, " "); | |
3647 | } | |
3648 | else | |
3649 | vty_out (vty, "self "); | |
16705130 | 3650 | vty_out (vty, "%3d", rinfo->tag); |
3651 | } | |
718e3744 | 3652 | |
3653 | vty_out (vty, "%s", VTY_NEWLINE); | |
3654 | } | |
3655 | return CMD_SUCCESS; | |
3656 | } | |
3657 | ||
16705130 | 3658 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3659 | DEFUN (show_ip_rip_status, | |
3660 | show_ip_rip_status_cmd, | |
3661 | "show ip rip status", | |
718e3744 | 3662 | SHOW_STR |
3663 | IP_STR | |
16705130 | 3664 | "Show RIP routes\n" |
718e3744 | 3665 | "IP routing protocol process parameters and statistics\n") |
3666 | { | |
52dc7ee6 | 3667 | struct listnode *node; |
718e3744 | 3668 | struct interface *ifp; |
3669 | struct rip_interface *ri; | |
1423c809 | 3670 | extern const struct message ri_version_msg[]; |
8a676be3 | 3671 | const char *send_version; |
3672 | const char *receive_version; | |
718e3744 | 3673 | |
3674 | if (! rip) | |
3675 | return CMD_SUCCESS; | |
3676 | ||
3677 | vty_out (vty, "Routing Protocol is \"rip\"%s", VTY_NEWLINE); | |
3678 | vty_out (vty, " Sending updates every %ld seconds with +/-50%%,", | |
3679 | rip->update_time); | |
a4c64828 AS |
3680 | vty_out (vty, " next due in %lu seconds%s", |
3681 | thread_timer_remain_second(rip->t_update), | |
718e3744 | 3682 | VTY_NEWLINE); |
3683 | vty_out (vty, " Timeout after %ld seconds,", rip->timeout_time); | |
3684 | vty_out (vty, " garbage collect after %ld seconds%s", rip->garbage_time, | |
3685 | VTY_NEWLINE); | |
3686 | ||
3687 | /* Filtering status show. */ | |
3688 | config_show_distribute (vty); | |
3689 | ||
3690 | /* Default metric information. */ | |
3691 | vty_out (vty, " Default redistribution metric is %d%s", | |
3692 | rip->default_metric, VTY_NEWLINE); | |
3693 | ||
3694 | /* Redistribute information. */ | |
3695 | vty_out (vty, " Redistributing:"); | |
3696 | config_write_rip_redistribute (vty, 0); | |
3697 | vty_out (vty, "%s", VTY_NEWLINE); | |
3698 | ||
f38a471c | 3699 | vty_out (vty, " Default version control: send version %s,", |
3700 | lookup(ri_version_msg,rip->version_send)); | |
3701 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3702 | vty_out (vty, " receive any version %s", VTY_NEWLINE); | |
3703 | else | |
3704 | vty_out (vty, " receive version %s %s", | |
3705 | lookup(ri_version_msg,rip->version_recv), VTY_NEWLINE); | |
718e3744 | 3706 | |
3707 | vty_out (vty, " Interface Send Recv Key-chain%s", VTY_NEWLINE); | |
3708 | ||
b2d7c082 | 3709 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
718e3744 | 3710 | { |
718e3744 | 3711 | ri = ifp->info; |
3712 | ||
82f5ee1e SH |
3713 | if (!ri->running) |
3714 | continue; | |
3715 | ||
718e3744 | 3716 | if (ri->enable_network || ri->enable_interface) |
3717 | { | |
3718 | if (ri->ri_send == RI_RIP_UNSPEC) | |
f38a471c | 3719 | send_version = lookup (ri_version_msg, rip->version_send); |
718e3744 | 3720 | else |
3721 | send_version = lookup (ri_version_msg, ri->ri_send); | |
3722 | ||
3723 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
f38a471c | 3724 | receive_version = lookup (ri_version_msg, rip->version_recv); |
718e3744 | 3725 | else |
3726 | receive_version = lookup (ri_version_msg, ri->ri_receive); | |
3727 | ||
3728 | vty_out (vty, " %-17s%-3s %-3s %s%s", ifp->name, | |
3729 | send_version, | |
3730 | receive_version, | |
3731 | ri->key_chain ? ri->key_chain : "", | |
3732 | VTY_NEWLINE); | |
3733 | } | |
3734 | } | |
3735 | ||
3736 | vty_out (vty, " Routing for Networks:%s", VTY_NEWLINE); | |
3737 | config_write_rip_network (vty, 0); | |
3738 | ||
4aaff3f8 | 3739 | { |
3740 | int found_passive = 0; | |
b2d7c082 | 3741 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
4aaff3f8 | 3742 | { |
4aaff3f8 | 3743 | ri = ifp->info; |
3744 | ||
3745 | if ((ri->enable_network || ri->enable_interface) && ri->passive) | |
3746 | { | |
3747 | if (!found_passive) | |
3748 | { | |
3749 | vty_out (vty, " Passive Interface(s):%s", VTY_NEWLINE); | |
3750 | found_passive = 1; | |
3751 | } | |
3752 | vty_out (vty, " %s%s", ifp->name, VTY_NEWLINE); | |
3753 | } | |
3754 | } | |
3755 | } | |
3756 | ||
718e3744 | 3757 | vty_out (vty, " Routing Information Sources:%s", VTY_NEWLINE); |
3758 | vty_out (vty, " Gateway BadPackets BadRoutes Distance Last Update%s", VTY_NEWLINE); | |
3759 | rip_peer_display (vty); | |
3760 | ||
3761 | rip_distance_show (vty); | |
3762 | ||
3763 | return CMD_SUCCESS; | |
3764 | } | |
3765 | ||
3766 | /* RIP configuration write function. */ | |
dc63bfd4 | 3767 | static int |
718e3744 | 3768 | config_write_rip (struct vty *vty) |
3769 | { | |
3770 | int write = 0; | |
3771 | struct route_node *rn; | |
3772 | struct rip_distance *rdistance; | |
3773 | ||
3774 | if (rip) | |
3775 | { | |
3776 | /* Router RIP statement. */ | |
3777 | vty_out (vty, "router rip%s", VTY_NEWLINE); | |
3778 | write++; | |
3779 | ||
3780 | /* RIP version statement. Default is RIP version 2. */ | |
f38a471c | 3781 | if (rip->version_send != RI_RIP_VERSION_2 |
3782 | || rip->version_recv != RI_RIP_VERSION_1_AND_2) | |
3783 | vty_out (vty, " version %d%s", rip->version_send, | |
718e3744 | 3784 | VTY_NEWLINE); |
3785 | ||
3786 | /* RIP timer configuration. */ | |
3787 | if (rip->update_time != RIP_UPDATE_TIMER_DEFAULT | |
3788 | || rip->timeout_time != RIP_TIMEOUT_TIMER_DEFAULT | |
3789 | || rip->garbage_time != RIP_GARBAGE_TIMER_DEFAULT) | |
3790 | vty_out (vty, " timers basic %lu %lu %lu%s", | |
3791 | rip->update_time, | |
3792 | rip->timeout_time, | |
3793 | rip->garbage_time, | |
3794 | VTY_NEWLINE); | |
3795 | ||
3796 | /* Default information configuration. */ | |
3797 | if (rip->default_information) | |
3798 | { | |
3799 | if (rip->default_information_route_map) | |
3800 | vty_out (vty, " default-information originate route-map %s%s", | |
3801 | rip->default_information_route_map, VTY_NEWLINE); | |
3802 | else | |
3803 | vty_out (vty, " default-information originate%s", | |
3804 | VTY_NEWLINE); | |
3805 | } | |
3806 | ||
3807 | /* Redistribute configuration. */ | |
3808 | config_write_rip_redistribute (vty, 1); | |
3809 | ||
3810 | /* RIP offset-list configuration. */ | |
3811 | config_write_rip_offset_list (vty); | |
3812 | ||
3813 | /* RIP enabled network and interface configuration. */ | |
3814 | config_write_rip_network (vty, 1); | |
3815 | ||
3816 | /* RIP default metric configuration */ | |
3817 | if (rip->default_metric != RIP_DEFAULT_METRIC_DEFAULT) | |
3818 | vty_out (vty, " default-metric %d%s", | |
3819 | rip->default_metric, VTY_NEWLINE); | |
3820 | ||
3821 | /* Distribute configuration. */ | |
3822 | write += config_write_distribute (vty); | |
3823 | ||
16705130 | 3824 | /* Interface routemap configuration */ |
3825 | write += config_write_if_rmap (vty); | |
3826 | ||
718e3744 | 3827 | /* Distance configuration. */ |
3828 | if (rip->distance) | |
3829 | vty_out (vty, " distance %d%s", rip->distance, VTY_NEWLINE); | |
3830 | ||
3831 | /* RIP source IP prefix distance configuration. */ | |
3832 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3833 | if ((rdistance = rn->info) != NULL) | |
3834 | vty_out (vty, " distance %d %s/%d %s%s", rdistance->distance, | |
3835 | inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
3836 | rdistance->access_list ? rdistance->access_list : "", | |
3837 | VTY_NEWLINE); | |
3838 | ||
8478ae7e LF |
3839 | /* ECMP configuration. */ |
3840 | if (rip->ecmp) | |
3841 | vty_out (vty, " allow-ecmp%s", VTY_NEWLINE); | |
3842 | ||
718e3744 | 3843 | /* RIP static route configuration. */ |
3844 | for (rn = route_top (rip->route); rn; rn = route_next (rn)) | |
3845 | if (rn->info) | |
3846 | vty_out (vty, " route %s/%d%s", | |
3847 | inet_ntoa (rn->p.u.prefix4), | |
3848 | rn->p.prefixlen, | |
3849 | VTY_NEWLINE); | |
3850 | ||
3851 | } | |
3852 | return write; | |
3853 | } | |
3854 | ||
3855 | /* RIP node structure. */ | |
7fc626de | 3856 | static struct cmd_node rip_node = |
718e3744 | 3857 | { |
3858 | RIP_NODE, | |
3859 | "%s(config-router)# ", | |
3860 | 1 | |
3861 | }; | |
6b0655a2 | 3862 | |
718e3744 | 3863 | /* Distribute-list update functions. */ |
dc63bfd4 | 3864 | static void |
718e3744 | 3865 | rip_distribute_update (struct distribute *dist) |
3866 | { | |
3867 | struct interface *ifp; | |
3868 | struct rip_interface *ri; | |
3869 | struct access_list *alist; | |
3870 | struct prefix_list *plist; | |
3871 | ||
3872 | if (! dist->ifname) | |
3873 | return; | |
3874 | ||
3875 | ifp = if_lookup_by_name (dist->ifname); | |
3876 | if (ifp == NULL) | |
3877 | return; | |
3878 | ||
3879 | ri = ifp->info; | |
3880 | ||
3881 | if (dist->list[DISTRIBUTE_IN]) | |
3882 | { | |
3883 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]); | |
3884 | if (alist) | |
3885 | ri->list[RIP_FILTER_IN] = alist; | |
3886 | else | |
3887 | ri->list[RIP_FILTER_IN] = NULL; | |
3888 | } | |
3889 | else | |
3890 | ri->list[RIP_FILTER_IN] = NULL; | |
3891 | ||
3892 | if (dist->list[DISTRIBUTE_OUT]) | |
3893 | { | |
3894 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]); | |
3895 | if (alist) | |
3896 | ri->list[RIP_FILTER_OUT] = alist; | |
3897 | else | |
3898 | ri->list[RIP_FILTER_OUT] = NULL; | |
3899 | } | |
3900 | else | |
3901 | ri->list[RIP_FILTER_OUT] = NULL; | |
3902 | ||
3903 | if (dist->prefix[DISTRIBUTE_IN]) | |
3904 | { | |
3905 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]); | |
3906 | if (plist) | |
3907 | ri->prefix[RIP_FILTER_IN] = plist; | |
3908 | else | |
3909 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3910 | } | |
3911 | else | |
3912 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3913 | ||
3914 | if (dist->prefix[DISTRIBUTE_OUT]) | |
3915 | { | |
3916 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]); | |
3917 | if (plist) | |
3918 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3919 | else | |
3920 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3921 | } | |
3922 | else | |
3923 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3924 | } | |
3925 | ||
3926 | void | |
3927 | rip_distribute_update_interface (struct interface *ifp) | |
3928 | { | |
3929 | struct distribute *dist; | |
3930 | ||
3931 | dist = distribute_lookup (ifp->name); | |
3932 | if (dist) | |
3933 | rip_distribute_update (dist); | |
3934 | } | |
3935 | ||
3936 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3937 | /* ARGSUSED */ |
dc63bfd4 | 3938 | static void |
02ff83c5 | 3939 | rip_distribute_update_all (struct prefix_list *notused) |
718e3744 | 3940 | { |
3941 | struct interface *ifp; | |
1eb8ef25 | 3942 | struct listnode *node, *nnode; |
718e3744 | 3943 | |
b2d7c082 | 3944 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), node, nnode, ifp)) |
1eb8ef25 | 3945 | rip_distribute_update_interface (ifp); |
718e3744 | 3946 | } |
11dde9c2 | 3947 | /* ARGSUSED */ |
dc63bfd4 | 3948 | static void |
11dde9c2 | 3949 | rip_distribute_update_all_wrapper(struct access_list *notused) |
3950 | { | |
02ff83c5 | 3951 | rip_distribute_update_all(NULL); |
11dde9c2 | 3952 | } |
6b0655a2 | 3953 | |
718e3744 | 3954 | /* Delete all added rip route. */ |
3955 | void | |
216565ab | 3956 | rip_clean (void) |
718e3744 | 3957 | { |
3958 | int i; | |
3959 | struct route_node *rp; | |
bce8e868 LF |
3960 | struct rip_info *rinfo = NULL; |
3961 | struct list *list = NULL; | |
3962 | struct listnode *listnode = NULL; | |
718e3744 | 3963 | |
3964 | if (rip) | |
3965 | { | |
3966 | /* Clear RIP routes */ | |
3967 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
bce8e868 LF |
3968 | if ((list = rp->info) != NULL) |
3969 | { | |
3970 | rinfo = listgetdata (listhead (list)); | |
3971 | if (rip_route_rte (rinfo)) | |
3972 | rip_zebra_ipv4_delete (rp); | |
3973 | ||
3974 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
3975 | { | |
3976 | RIP_TIMER_OFF (rinfo->t_timeout); | |
3977 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
3978 | rip_info_free (rinfo); | |
3979 | } | |
3980 | list_delete (list); | |
3981 | rp->info = NULL; | |
3982 | route_unlock_node (rp); | |
3983 | } | |
718e3744 | 3984 | |
3985 | /* Cancel RIP related timers. */ | |
3986 | RIP_TIMER_OFF (rip->t_update); | |
3987 | RIP_TIMER_OFF (rip->t_triggered_update); | |
3988 | RIP_TIMER_OFF (rip->t_triggered_interval); | |
3989 | ||
3990 | /* Cancel read thread. */ | |
3991 | if (rip->t_read) | |
3992 | { | |
3993 | thread_cancel (rip->t_read); | |
3994 | rip->t_read = NULL; | |
3995 | } | |
3996 | ||
3997 | /* Close RIP socket. */ | |
3998 | if (rip->sock >= 0) | |
3999 | { | |
4000 | close (rip->sock); | |
4001 | rip->sock = -1; | |
4002 | } | |
4003 | ||
4004 | /* Static RIP route configuration. */ | |
4005 | for (rp = route_top (rip->route); rp; rp = route_next (rp)) | |
4006 | if (rp->info) | |
4007 | { | |
4008 | rp->info = NULL; | |
4009 | route_unlock_node (rp); | |
4010 | } | |
4011 | ||
4012 | /* RIP neighbor configuration. */ | |
4013 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) | |
4014 | if (rp->info) | |
4015 | { | |
4016 | rp->info = NULL; | |
4017 | route_unlock_node (rp); | |
4018 | } | |
4019 | ||
4020 | /* Redistribute related clear. */ | |
4021 | if (rip->default_information_route_map) | |
4022 | free (rip->default_information_route_map); | |
4023 | ||
4024 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
4025 | if (rip->route_map[i].name) | |
4026 | free (rip->route_map[i].name); | |
4027 | ||
4028 | XFREE (MTYPE_ROUTE_TABLE, rip->table); | |
4029 | XFREE (MTYPE_ROUTE_TABLE, rip->route); | |
4030 | XFREE (MTYPE_ROUTE_TABLE, rip->neighbor); | |
4031 | ||
4032 | XFREE (MTYPE_RIP, rip); | |
4033 | rip = NULL; | |
4034 | } | |
4035 | ||
4036 | rip_clean_network (); | |
4aaff3f8 | 4037 | rip_passive_nondefault_clean (); |
718e3744 | 4038 | rip_offset_clean (); |
4039 | rip_interface_clean (); | |
4040 | rip_distance_reset (); | |
4041 | rip_redistribute_clean (); | |
4042 | } | |
4043 | ||
4044 | /* Reset all values to the default settings. */ | |
4045 | void | |
216565ab | 4046 | rip_reset (void) |
718e3744 | 4047 | { |
4048 | /* Reset global counters. */ | |
4049 | rip_global_route_changes = 0; | |
4050 | rip_global_queries = 0; | |
4051 | ||
4052 | /* Call ripd related reset functions. */ | |
4053 | rip_debug_reset (); | |
4054 | rip_route_map_reset (); | |
4055 | ||
4056 | /* Call library reset functions. */ | |
4057 | vty_reset (); | |
4058 | access_list_reset (); | |
4059 | prefix_list_reset (); | |
4060 | ||
4061 | distribute_list_reset (); | |
4062 | ||
4063 | rip_interface_reset (); | |
4064 | rip_distance_reset (); | |
4065 | ||
4066 | rip_zclient_reset (); | |
4067 | } | |
4068 | ||
dc63bfd4 | 4069 | static void |
16705130 | 4070 | rip_if_rmap_update (struct if_rmap *if_rmap) |
4071 | { | |
4072 | struct interface *ifp; | |
4073 | struct rip_interface *ri; | |
4074 | struct route_map *rmap; | |
4075 | ||
4076 | ifp = if_lookup_by_name (if_rmap->ifname); | |
4077 | if (ifp == NULL) | |
4078 | return; | |
4079 | ||
4080 | ri = ifp->info; | |
4081 | ||
4082 | if (if_rmap->routemap[IF_RMAP_IN]) | |
4083 | { | |
4084 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_IN]); | |
4085 | if (rmap) | |
4086 | ri->routemap[IF_RMAP_IN] = rmap; | |
4087 | else | |
4088 | ri->routemap[IF_RMAP_IN] = NULL; | |
4089 | } | |
4090 | else | |
4091 | ri->routemap[RIP_FILTER_IN] = NULL; | |
4092 | ||
4093 | if (if_rmap->routemap[IF_RMAP_OUT]) | |
4094 | { | |
4095 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_OUT]); | |
4096 | if (rmap) | |
4097 | ri->routemap[IF_RMAP_OUT] = rmap; | |
4098 | else | |
4099 | ri->routemap[IF_RMAP_OUT] = NULL; | |
4100 | } | |
4101 | else | |
4102 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
4103 | } | |
4104 | ||
4105 | void | |
4106 | rip_if_rmap_update_interface (struct interface *ifp) | |
4107 | { | |
4108 | struct if_rmap *if_rmap; | |
4109 | ||
4110 | if_rmap = if_rmap_lookup (ifp->name); | |
4111 | if (if_rmap) | |
4112 | rip_if_rmap_update (if_rmap); | |
4113 | } | |
4114 | ||
dc63bfd4 | 4115 | static void |
16705130 | 4116 | rip_routemap_update_redistribute (void) |
4117 | { | |
4118 | int i; | |
4119 | ||
4120 | if (rip) | |
4121 | { | |
4122 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
4123 | { | |
4124 | if (rip->route_map[i].name) | |
4125 | rip->route_map[i].map = | |
4126 | route_map_lookup_by_name (rip->route_map[i].name); | |
4127 | } | |
4128 | } | |
4129 | } | |
4130 | ||
11dde9c2 | 4131 | /* ARGSUSED */ |
dc63bfd4 | 4132 | static void |
98b718a9 | 4133 | rip_routemap_update (const char *notused) |
16705130 | 4134 | { |
4135 | struct interface *ifp; | |
1eb8ef25 | 4136 | struct listnode *node, *nnode; |
16705130 | 4137 | |
b2d7c082 | 4138 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), node, nnode, ifp)) |
1eb8ef25 | 4139 | rip_if_rmap_update_interface (ifp); |
16705130 | 4140 | |
4141 | rip_routemap_update_redistribute (); | |
4142 | } | |
4143 | ||
718e3744 | 4144 | /* Allocate new rip structure and set default value. */ |
4145 | void | |
dc63bfd4 | 4146 | rip_init (void) |
718e3744 | 4147 | { |
4148 | /* Randomize for triggered update random(). */ | |
b06fd125 | 4149 | srandom (time (NULL)); |
718e3744 | 4150 | |
4151 | /* Install top nodes. */ | |
4152 | install_node (&rip_node, config_write_rip); | |
4153 | ||
4154 | /* Install rip commands. */ | |
4155 | install_element (VIEW_NODE, &show_ip_rip_cmd); | |
16705130 | 4156 | install_element (VIEW_NODE, &show_ip_rip_status_cmd); |
718e3744 | 4157 | install_element (ENABLE_NODE, &show_ip_rip_cmd); |
16705130 | 4158 | install_element (ENABLE_NODE, &show_ip_rip_status_cmd); |
718e3744 | 4159 | install_element (CONFIG_NODE, &router_rip_cmd); |
4160 | install_element (CONFIG_NODE, &no_router_rip_cmd); | |
4161 | ||
4162 | install_default (RIP_NODE); | |
4163 | install_element (RIP_NODE, &rip_version_cmd); | |
4164 | install_element (RIP_NODE, &no_rip_version_cmd); | |
718e3744 | 4165 | install_element (RIP_NODE, &rip_default_metric_cmd); |
4166 | install_element (RIP_NODE, &no_rip_default_metric_cmd); | |
718e3744 | 4167 | install_element (RIP_NODE, &rip_timers_cmd); |
4168 | install_element (RIP_NODE, &no_rip_timers_cmd); | |
4169 | install_element (RIP_NODE, &rip_route_cmd); | |
4170 | install_element (RIP_NODE, &no_rip_route_cmd); | |
4171 | install_element (RIP_NODE, &rip_distance_cmd); | |
4172 | install_element (RIP_NODE, &no_rip_distance_cmd); | |
4173 | install_element (RIP_NODE, &rip_distance_source_cmd); | |
4174 | install_element (RIP_NODE, &no_rip_distance_source_cmd); | |
4175 | install_element (RIP_NODE, &rip_distance_source_access_list_cmd); | |
4176 | install_element (RIP_NODE, &no_rip_distance_source_access_list_cmd); | |
8478ae7e LF |
4177 | install_element (RIP_NODE, &rip_allow_ecmp_cmd); |
4178 | install_element (RIP_NODE, &no_rip_allow_ecmp_cmd); | |
718e3744 | 4179 | |
4180 | /* Debug related init. */ | |
4181 | rip_debug_init (); | |
4182 | ||
718e3744 | 4183 | /* SNMP init. */ |
4184 | #ifdef HAVE_SNMP | |
4185 | rip_snmp_init (); | |
4186 | #endif /* HAVE_SNMP */ | |
4187 | ||
4188 | /* Access list install. */ | |
4189 | access_list_init (); | |
11dde9c2 | 4190 | access_list_add_hook (rip_distribute_update_all_wrapper); |
4191 | access_list_delete_hook (rip_distribute_update_all_wrapper); | |
718e3744 | 4192 | |
4193 | /* Prefix list initialize.*/ | |
4194 | prefix_list_init (); | |
4195 | prefix_list_add_hook (rip_distribute_update_all); | |
4196 | prefix_list_delete_hook (rip_distribute_update_all); | |
4197 | ||
4198 | /* Distribute list install. */ | |
4199 | distribute_list_init (RIP_NODE); | |
4200 | distribute_list_add_hook (rip_distribute_update); | |
4201 | distribute_list_delete_hook (rip_distribute_update); | |
4202 | ||
16705130 | 4203 | /* Route-map */ |
4204 | rip_route_map_init (); | |
4205 | rip_offset_init (); | |
4206 | ||
4207 | route_map_add_hook (rip_routemap_update); | |
4208 | route_map_delete_hook (rip_routemap_update); | |
4209 | ||
4210 | if_rmap_init (RIP_NODE); | |
4211 | if_rmap_hook_add (rip_if_rmap_update); | |
4212 | if_rmap_hook_delete (rip_if_rmap_update); | |
4213 | ||
718e3744 | 4214 | /* Distance control. */ |
4215 | rip_distance_table = route_table_init (); | |
4216 | } |