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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 |
7c989d74 | 319 | rip_filter (int rip_distribute, struct prefix_ipv4 *p, struct rip_interface *ri) |
718e3744 | 320 | { |
321 | struct distribute *dist; | |
322 | struct access_list *alist; | |
323 | struct prefix_list *plist; | |
7c989d74 | 324 | int distribute = rip_distribute == RIP_FILTER_OUT ? |
fb23cf4a | 325 | DISTRIBUTE_V4_OUT : DISTRIBUTE_V4_IN; |
7c989d74 | 326 | const char *inout = rip_distribute == RIP_FILTER_OUT ? "out" : "in"; |
718e3744 | 327 | |
328 | /* Input distribute-list filtering. */ | |
7c989d74 | 329 | if (ri->list[rip_distribute]) |
718e3744 | 330 | { |
7c989d74 | 331 | if (access_list_apply (ri->list[rip_distribute], |
718e3744 | 332 | (struct prefix *) p) == FILTER_DENY) |
333 | { | |
334 | if (IS_RIP_DEBUG_PACKET) | |
7c989d74 MB |
335 | zlog_debug ("%s/%d filtered by distribute %s", |
336 | inet_ntoa (p->prefix), p->prefixlen, inout); | |
718e3744 | 337 | return -1; |
338 | } | |
339 | } | |
7c989d74 | 340 | if (ri->prefix[rip_distribute]) |
718e3744 | 341 | { |
7c989d74 | 342 | if (prefix_list_apply (ri->prefix[rip_distribute], |
718e3744 | 343 | (struct prefix *) p) == PREFIX_DENY) |
344 | { | |
345 | if (IS_RIP_DEBUG_PACKET) | |
7c989d74 MB |
346 | zlog_debug ("%s/%d filtered by prefix-list %s", |
347 | inet_ntoa (p->prefix), p->prefixlen, inout); | |
718e3744 | 348 | return -1; |
349 | } | |
350 | } | |
351 | ||
352 | /* All interface filter check. */ | |
353 | dist = distribute_lookup (NULL); | |
354 | if (dist) | |
355 | { | |
7c989d74 | 356 | if (dist->list[distribute]) |
718e3744 | 357 | { |
7c989d74 | 358 | alist = access_list_lookup (AFI_IP, dist->list[distribute]); |
718e3744 | 359 | |
718e3744 | 360 | if (alist) |
361 | { | |
7c989d74 | 362 | if (access_list_apply (alist, (struct prefix *) p) == FILTER_DENY) |
718e3744 | 363 | { |
364 | if (IS_RIP_DEBUG_PACKET) | |
7c989d74 MB |
365 | zlog_debug ("%s/%d filtered by distribute %s", |
366 | inet_ntoa (p->prefix), p->prefixlen, inout); | |
718e3744 | 367 | return -1; |
368 | } | |
369 | } | |
370 | } | |
7c989d74 | 371 | if (dist->prefix[distribute]) |
718e3744 | 372 | { |
7c989d74 MB |
373 | plist = prefix_list_lookup (AFI_IP, dist->prefix[distribute]); |
374 | ||
718e3744 | 375 | if (plist) |
376 | { | |
377 | if (prefix_list_apply (plist, | |
378 | (struct prefix *) p) == PREFIX_DENY) | |
379 | { | |
380 | if (IS_RIP_DEBUG_PACKET) | |
7c989d74 MB |
381 | zlog_debug ("%s/%d filtered by prefix-list %s", |
382 | inet_ntoa (p->prefix), p->prefixlen, inout); | |
718e3744 | 383 | return -1; |
384 | } | |
385 | } | |
386 | } | |
387 | } | |
388 | return 0; | |
389 | } | |
390 | ||
391 | /* Check nexthop address validity. */ | |
392 | static int | |
393 | rip_nexthop_check (struct in_addr *addr) | |
394 | { | |
52dc7ee6 | 395 | struct listnode *node; |
396 | struct listnode *cnode; | |
718e3744 | 397 | struct interface *ifp; |
398 | struct connected *ifc; | |
399 | struct prefix *p; | |
400 | ||
401 | /* If nexthop address matches local configured address then it is | |
402 | invalid nexthop. */ | |
b2d7c082 DS |
403 | |
404 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) | |
718e3744 | 405 | { |
1eb8ef25 | 406 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, ifc)) |
718e3744 | 407 | { |
718e3744 | 408 | p = ifc->address; |
409 | ||
410 | if (p->family == AF_INET | |
411 | && IPV4_ADDR_SAME (&p->u.prefix4, addr)) | |
412 | return -1; | |
413 | } | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
418 | /* RIP add route to routing table. */ | |
dc63bfd4 | 419 | static void |
718e3744 | 420 | rip_rte_process (struct rte *rte, struct sockaddr_in *from, |
a87552cd | 421 | struct interface *ifp) |
718e3744 | 422 | { |
423 | int ret; | |
424 | struct prefix_ipv4 p; | |
425 | struct route_node *rp; | |
bce8e868 | 426 | struct rip_info *rinfo = NULL, newinfo; |
718e3744 | 427 | struct rip_interface *ri; |
428 | struct in_addr *nexthop; | |
718e3744 | 429 | int same = 0; |
fbf5d033 | 430 | unsigned char old_dist, new_dist; |
bce8e868 LF |
431 | struct list *list = NULL; |
432 | struct listnode *node = NULL; | |
718e3744 | 433 | |
434 | /* Make prefix structure. */ | |
435 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
436 | p.family = AF_INET; | |
437 | p.prefix = rte->prefix; | |
438 | p.prefixlen = ip_masklen (rte->mask); | |
439 | ||
440 | /* Make sure mask is applied. */ | |
441 | apply_mask_ipv4 (&p); | |
442 | ||
443 | /* Apply input filters. */ | |
444 | ri = ifp->info; | |
445 | ||
7c989d74 | 446 | ret = rip_filter (RIP_FILTER_IN, &p, ri); |
718e3744 | 447 | if (ret < 0) |
448 | return; | |
449 | ||
bce8e868 LF |
450 | memset (&newinfo, 0, sizeof (newinfo)); |
451 | newinfo.type = ZEBRA_ROUTE_RIP; | |
452 | newinfo.sub_type = RIP_ROUTE_RTE; | |
453 | newinfo.nexthop = rte->nexthop; | |
454 | newinfo.from = from->sin_addr; | |
455 | newinfo.ifindex = ifp->ifindex; | |
456 | newinfo.metric = rte->metric; | |
457 | newinfo.metric_out = rte->metric; /* XXX */ | |
458 | newinfo.tag = ntohs (rte->tag); /* XXX */ | |
459 | ||
16705130 | 460 | /* Modify entry according to the interface routemap. */ |
461 | if (ri->routemap[RIP_FILTER_IN]) | |
462 | { | |
463 | int ret; | |
16705130 | 464 | |
465 | /* The object should be of the type of rip_info */ | |
a87552cd | 466 | ret = route_map_apply (ri->routemap[RIP_FILTER_IN], |
467 | (struct prefix *) &p, RMAP_RIP, &newinfo); | |
16705130 | 468 | |
469 | if (ret == RMAP_DENYMATCH) | |
a87552cd | 470 | { |
471 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 472 | zlog_debug ("RIP %s/%d is filtered by route-map in", |
a87552cd | 473 | inet_ntoa (p.prefix), p.prefixlen); |
474 | return; | |
475 | } | |
16705130 | 476 | |
477 | /* Get back the object */ | |
a87552cd | 478 | rte->nexthop = newinfo.nexthop_out; |
479 | rte->tag = htons (newinfo.tag_out); /* XXX */ | |
480 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the metric_out field */ | |
16705130 | 481 | } |
482 | ||
718e3744 | 483 | /* Once the entry has been validated, update the metric by |
484 | adding the cost of the network on wich the message | |
485 | arrived. If the result is greater than infinity, use infinity | |
486 | (RFC2453 Sec. 3.9.2) */ | |
487 | /* Zebra ripd can handle offset-list in. */ | |
488 | ret = rip_offset_list_apply_in (&p, ifp, &rte->metric); | |
489 | ||
490 | /* If offset-list does not modify the metric use interface's | |
491 | metric. */ | |
a87552cd | 492 | if (!ret) |
7b3b98ae | 493 | rte->metric += ifp->metric ? ifp->metric : 1; |
718e3744 | 494 | |
495 | if (rte->metric > RIP_METRIC_INFINITY) | |
496 | rte->metric = RIP_METRIC_INFINITY; | |
497 | ||
498 | /* Set nexthop pointer. */ | |
499 | if (rte->nexthop.s_addr == 0) | |
500 | nexthop = &from->sin_addr; | |
501 | else | |
502 | nexthop = &rte->nexthop; | |
503 | ||
16705130 | 504 | /* Check if nexthop address is myself, then do nothing. */ |
718e3744 | 505 | if (rip_nexthop_check (nexthop) < 0) |
506 | { | |
507 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 508 | zlog_debug ("Nexthop address %s is myself", inet_ntoa (*nexthop)); |
718e3744 | 509 | return; |
510 | } | |
511 | ||
512 | /* Get index for the prefix. */ | |
513 | rp = route_node_get (rip->table, (struct prefix *) &p); | |
514 | ||
bce8e868 LF |
515 | newinfo.rp = rp; |
516 | newinfo.nexthop = *nexthop; | |
517 | newinfo.metric = rte->metric; | |
518 | newinfo.tag = ntohs (rte->tag); | |
519 | newinfo.distance = rip_distance_apply (&newinfo); | |
520 | ||
521 | new_dist = newinfo.distance ? newinfo.distance : ZEBRA_RIP_DISTANCE_DEFAULT; | |
522 | ||
718e3744 | 523 | /* Check to see whether there is already RIP route on the table. */ |
bce8e868 LF |
524 | if ((list = rp->info) != NULL) |
525 | for (ALL_LIST_ELEMENTS_RO (list, node, rinfo)) | |
526 | { | |
527 | /* Need to compare with redistributed entry or local entry */ | |
528 | if (!rip_route_rte (rinfo)) | |
529 | break; | |
530 | ||
531 | if (IPV4_ADDR_SAME (&rinfo->from, &from->sin_addr) && | |
532 | IPV4_ADDR_SAME (&rinfo->nexthop, nexthop)) | |
533 | break; | |
534 | ||
535 | if (!listnextnode (node)) | |
536 | { | |
537 | /* Not found in the list */ | |
538 | ||
539 | if (rte->metric > rinfo->metric) | |
540 | { | |
541 | /* New route has a greater metric. Discard it. */ | |
542 | route_unlock_node (rp); | |
543 | return; | |
544 | } | |
545 | ||
546 | if (rte->metric < rinfo->metric) | |
547 | /* New route has a smaller metric. Replace the ECMP list | |
548 | * with the new one in below. */ | |
549 | break; | |
550 | ||
551 | /* Metrics are same. We compare the distances. */ | |
552 | old_dist = rinfo->distance ? \ | |
553 | rinfo->distance : ZEBRA_RIP_DISTANCE_DEFAULT; | |
554 | ||
555 | if (new_dist > old_dist) | |
556 | { | |
557 | /* New route has a greater distance. Discard it. */ | |
558 | route_unlock_node (rp); | |
559 | return; | |
560 | } | |
561 | ||
562 | if (new_dist < old_dist) | |
563 | /* New route has a smaller distance. Replace the ECMP list | |
564 | * with the new one in below. */ | |
565 | break; | |
566 | ||
567 | /* Metrics and distances are both same. Keep "rinfo" null and | |
568 | * the new route is added in the ECMP list in below. */ | |
569 | } | |
570 | } | |
718e3744 | 571 | |
572 | if (rinfo) | |
573 | { | |
718e3744 | 574 | /* Local static route. */ |
575 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
a87552cd | 576 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
577 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
578 | && rinfo->metric != RIP_METRIC_INFINITY) | |
fbf5d033 | 579 | { |
580 | route_unlock_node (rp); | |
581 | return; | |
582 | } | |
583 | ||
584 | /* Redistributed route check. */ | |
585 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
586 | && rinfo->metric != RIP_METRIC_INFINITY) | |
587 | { | |
fbf5d033 | 588 | old_dist = rinfo->distance; |
b68da446 DL |
589 | /* Only routes directly connected to an interface (nexthop == 0) |
590 | * may have a valid NULL distance */ | |
591 | if (rinfo->nexthop.s_addr != 0) | |
7a383339 | 592 | old_dist = old_dist ? old_dist : ZEBRA_RIP_DISTANCE_DEFAULT; |
fbf5d033 | 593 | /* If imported route does not have STRICT precedence, |
594 | mark it as a ghost */ | |
bce8e868 LF |
595 | if (new_dist <= old_dist && rte->metric != RIP_METRIC_INFINITY) |
596 | rip_ecmp_replace (&newinfo); | |
597 | ||
598 | route_unlock_node (rp); | |
599 | return; | |
fbf5d033 | 600 | } |
718e3744 | 601 | } |
a87552cd | 602 | |
603 | if (!rinfo) | |
718e3744 | 604 | { |
bce8e868 LF |
605 | if (rp->info) |
606 | route_unlock_node (rp); | |
607 | ||
718e3744 | 608 | /* Now, check to see whether there is already an explicit route |
a87552cd | 609 | for the destination prefix. If there is no such route, add |
610 | this route to the routing table, unless the metric is | |
611 | infinity (there is no point in adding a route which | |
612 | unusable). */ | |
718e3744 | 613 | if (rte->metric != RIP_METRIC_INFINITY) |
bce8e868 | 614 | rip_ecmp_add (&newinfo); |
718e3744 | 615 | } |
616 | else | |
617 | { | |
618 | /* Route is there but we are not sure the route is RIP or not. */ | |
a87552cd | 619 | |
718e3744 | 620 | /* If there is an existing route, compare the next hop address |
a87552cd | 621 | to the address of the router from which the datagram came. |
622 | If this datagram is from the same router as the existing | |
623 | route, reinitialize the timeout. */ | |
16705130 | 624 | same = (IPV4_ADDR_SAME (&rinfo->from, &from->sin_addr) |
a87552cd | 625 | && (rinfo->ifindex == ifp->ifindex)); |
718e3744 | 626 | |
bce8e868 LF |
627 | old_dist = rinfo->distance ? \ |
628 | rinfo->distance : ZEBRA_RIP_DISTANCE_DEFAULT; | |
b94f9dbd | 629 | |
718e3744 | 630 | /* Next, compare the metrics. If the datagram is from the same |
a87552cd | 631 | router as the existing route, and the new metric is different |
632 | than the old one; or, if the new metric is lower than the old | |
633 | one, or if the tag has been changed; or if there is a route | |
634 | with a lower administrave distance; or an update of the | |
635 | distance on the actual route; do the following actions: */ | |
636 | if ((same && rinfo->metric != rte->metric) | |
637 | || (rte->metric < rinfo->metric) | |
638 | || ((same) | |
639 | && (rinfo->metric == rte->metric) | |
bce8e868 LF |
640 | && (newinfo.tag != rinfo->tag)) |
641 | || (old_dist > new_dist) | |
642 | || ((old_dist != new_dist) && same)) | |
a87552cd | 643 | { |
bce8e868 | 644 | if (listcount (list) == 1) |
a87552cd | 645 | { |
bce8e868 LF |
646 | if (newinfo.metric != RIP_METRIC_INFINITY) |
647 | rip_ecmp_replace (&newinfo); | |
648 | else | |
649 | rip_ecmp_delete (rinfo); | |
a87552cd | 650 | } |
bce8e868 | 651 | else |
a87552cd | 652 | { |
bce8e868 LF |
653 | if (newinfo.metric < rinfo->metric) |
654 | rip_ecmp_replace (&newinfo); | |
655 | else if (newinfo.metric > rinfo->metric) | |
656 | rip_ecmp_delete (rinfo); | |
657 | else if (new_dist < old_dist) | |
658 | rip_ecmp_replace (&newinfo); | |
659 | else if (new_dist > old_dist) | |
660 | rip_ecmp_delete (rinfo); | |
661 | else | |
662 | { | |
663 | int update = CHECK_FLAG (rinfo->flags, RIP_RTF_FIB) ? 1 : 0; | |
a87552cd | 664 | |
bce8e868 | 665 | assert (newinfo.metric != RIP_METRIC_INFINITY); |
a87552cd | 666 | |
a87552cd | 667 | RIP_TIMER_OFF (rinfo->t_timeout); |
bce8e868 LF |
668 | RIP_TIMER_OFF (rinfo->t_garbage_collect); |
669 | memcpy (rinfo, &newinfo, sizeof (struct rip_info)); | |
670 | rip_timeout_update (rinfo); | |
671 | ||
672 | if (update) | |
673 | rip_zebra_ipv4_add (rp); | |
a87552cd | 674 | |
bce8e868 LF |
675 | /* - Set the route change flag on the first entry. */ |
676 | rinfo = listgetdata (listhead (list)); | |
677 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
678 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
a87552cd | 679 | } |
680 | } | |
a87552cd | 681 | } |
bce8e868 LF |
682 | else /* same & no change */ |
683 | rip_timeout_update (rinfo); | |
684 | ||
718e3744 | 685 | /* Unlock tempolary lock of the route. */ |
686 | route_unlock_node (rp); | |
687 | } | |
688 | } | |
689 | ||
690 | /* Dump RIP packet */ | |
dc63bfd4 | 691 | static void |
8a676be3 | 692 | rip_packet_dump (struct rip_packet *packet, int size, const char *sndrcv) |
718e3744 | 693 | { |
694 | caddr_t lim; | |
695 | struct rte *rte; | |
8a676be3 | 696 | const char *command_str; |
718e3744 | 697 | char pbuf[BUFSIZ], nbuf[BUFSIZ]; |
698 | u_char netmask = 0; | |
699 | u_char *p; | |
700 | ||
701 | /* Set command string. */ | |
702 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
703 | command_str = lookup (rip_msg, packet->command); | |
704 | else | |
705 | command_str = "unknown"; | |
706 | ||
707 | /* Dump packet header. */ | |
5d6c3779 | 708 | zlog_debug ("%s %s version %d packet size %d", |
718e3744 | 709 | sndrcv, command_str, packet->version, size); |
710 | ||
711 | /* Dump each routing table entry. */ | |
712 | rte = packet->rte; | |
713 | ||
714 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) | |
715 | { | |
716 | if (packet->version == RIPv2) | |
717 | { | |
718 | netmask = ip_masklen (rte->mask); | |
719 | ||
ca5e516c | 720 | if (rte->family == htons (RIP_FAMILY_AUTH)) |
718e3744 | 721 | { |
ca5e516c | 722 | if (rte->tag == htons (RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 723 | { |
724 | p = (u_char *)&rte->prefix; | |
725 | ||
5d6c3779 | 726 | zlog_debug (" family 0x%X type %d auth string: %s", |
718e3744 | 727 | ntohs (rte->family), ntohs (rte->tag), p); |
728 | } | |
ca5e516c | 729 | else if (rte->tag == htons (RIP_AUTH_MD5)) |
718e3744 | 730 | { |
731 | struct rip_md5_info *md5; | |
732 | ||
733 | md5 = (struct rip_md5_info *) &packet->rte; | |
734 | ||
5d6c3779 | 735 | zlog_debug (" family 0x%X type %d (MD5 authentication)", |
718e3744 | 736 | ntohs (md5->family), ntohs (md5->type)); |
5d6c3779 | 737 | zlog_debug (" RIP-2 packet len %d Key ID %d" |
ca5e516c | 738 | " Auth Data len %d", |
739 | ntohs (md5->packet_len), md5->keyid, | |
740 | md5->auth_len); | |
5d6c3779 | 741 | zlog_debug (" Sequence Number %ld", |
ca5e516c | 742 | (u_long) ntohl (md5->sequence)); |
718e3744 | 743 | } |
ca5e516c | 744 | else if (rte->tag == htons (RIP_AUTH_DATA)) |
718e3744 | 745 | { |
746 | p = (u_char *)&rte->prefix; | |
747 | ||
5d6c3779 | 748 | zlog_debug (" family 0x%X type %d (MD5 data)", |
718e3744 | 749 | ntohs (rte->family), ntohs (rte->tag)); |
5d6c3779 | 750 | zlog_debug (" MD5: %02X%02X%02X%02X%02X%02X%02X%02X" |
58093a79 | 751 | "%02X%02X%02X%02X%02X%02X%02X%02X", |
ca5e516c | 752 | p[0], p[1], p[2], p[3], p[4], p[5], p[6], |
58093a79 | 753 | p[7], p[8], p[9], p[10], p[11], p[12], p[13], |
ca5e516c | 754 | p[14], p[15]); |
718e3744 | 755 | } |
756 | else | |
757 | { | |
5d6c3779 | 758 | zlog_debug (" family 0x%X type %d (Unknown auth type)", |
718e3744 | 759 | ntohs (rte->family), ntohs (rte->tag)); |
760 | } | |
761 | } | |
762 | else | |
dc9ffce8 | 763 | zlog_debug (" %s/%d -> %s family %d tag %"ROUTE_TAG_PRI" metric %ld", |
ca5e516c | 764 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
765 | netmask, inet_ntop (AF_INET, &rte->nexthop, nbuf, | |
766 | BUFSIZ), ntohs (rte->family), | |
dc9ffce8 CF |
767 | (route_tag_t)ntohs (rte->tag), |
768 | (u_long) ntohl (rte->metric)); | |
718e3744 | 769 | } |
770 | else | |
771 | { | |
dc9ffce8 | 772 | zlog_debug (" %s family %d tag %"ROUTE_TAG_PRI" metric %ld", |
718e3744 | 773 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
dc9ffce8 | 774 | ntohs (rte->family), (route_tag_t)ntohs (rte->tag), |
718e3744 | 775 | (u_long)ntohl (rte->metric)); |
776 | } | |
777 | } | |
778 | } | |
779 | ||
780 | /* Check if the destination address is valid (unicast; not net 0 | |
781 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
782 | check net 0 because we accept default route. */ | |
dc63bfd4 | 783 | static int |
718e3744 | 784 | rip_destination_check (struct in_addr addr) |
785 | { | |
786 | u_int32_t destination; | |
787 | ||
788 | /* Convert to host byte order. */ | |
789 | destination = ntohl (addr.s_addr); | |
790 | ||
791 | if (IPV4_NET127 (destination)) | |
792 | return 0; | |
793 | ||
794 | /* Net 0 may match to the default route. */ | |
795 | if (IPV4_NET0 (destination) && destination != 0) | |
796 | return 0; | |
797 | ||
798 | /* Unicast address must belong to class A, B, C. */ | |
799 | if (IN_CLASSA (destination)) | |
800 | return 1; | |
801 | if (IN_CLASSB (destination)) | |
802 | return 1; | |
803 | if (IN_CLASSC (destination)) | |
804 | return 1; | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | /* RIP version 2 authentication. */ | |
dc63bfd4 | 810 | static int |
718e3744 | 811 | rip_auth_simple_password (struct rte *rte, struct sockaddr_in *from, |
812 | struct interface *ifp) | |
813 | { | |
814 | struct rip_interface *ri; | |
1cfaf93c RW |
815 | char *auth_str = (char *) &rte->prefix; |
816 | int i; | |
817 | ||
818 | /* reject passwords with zeros in the middle of the string */ | |
819 | for (i = strlen (auth_str); i < 16; i++) | |
820 | { | |
821 | if (auth_str[i] != '\0') | |
822 | return 0; | |
823 | } | |
718e3744 | 824 | |
825 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 826 | zlog_debug ("RIPv2 simple password authentication from %s", |
718e3744 | 827 | inet_ntoa (from->sin_addr)); |
828 | ||
829 | ri = ifp->info; | |
830 | ||
831 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
ca5e516c | 832 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 833 | return 0; |
834 | ||
835 | /* Simple password authentication. */ | |
836 | if (ri->auth_str) | |
837 | { | |
718e3744 | 838 | if (strncmp (auth_str, ri->auth_str, 16) == 0) |
839 | return 1; | |
840 | } | |
841 | if (ri->key_chain) | |
842 | { | |
843 | struct keychain *keychain; | |
844 | struct key *key; | |
845 | ||
846 | keychain = keychain_lookup (ri->key_chain); | |
847 | if (keychain == NULL) | |
848 | return 0; | |
849 | ||
1cfaf93c | 850 | key = key_match_for_accept (keychain, auth_str); |
718e3744 | 851 | if (key) |
852 | return 1; | |
853 | } | |
854 | return 0; | |
855 | } | |
856 | ||
857 | /* RIP version 2 authentication with MD5. */ | |
dc63bfd4 | 858 | static int |
718e3744 | 859 | rip_auth_md5 (struct rip_packet *packet, struct sockaddr_in *from, |
ca5e516c | 860 | int length, struct interface *ifp) |
718e3744 | 861 | { |
862 | struct rip_interface *ri; | |
863 | struct rip_md5_info *md5; | |
864 | struct rip_md5_data *md5data; | |
865 | struct keychain *keychain; | |
866 | struct key *key; | |
c1a03d47 | 867 | MD5_CTX ctx; |
718e3744 | 868 | u_char digest[RIP_AUTH_MD5_SIZE]; |
869 | u_int16_t packet_len; | |
98fd1e61 | 870 | char auth_str[RIP_AUTH_MD5_SIZE]; |
718e3744 | 871 | |
872 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 873 | zlog_debug ("RIPv2 MD5 authentication from %s", |
ca5e516c | 874 | inet_ntoa (from->sin_addr)); |
718e3744 | 875 | |
876 | ri = ifp->info; | |
877 | md5 = (struct rip_md5_info *) &packet->rte; | |
878 | ||
879 | /* Check auth type. */ | |
ca5e516c | 880 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) |
718e3744 | 881 | return 0; |
882 | ||
ca5e516c | 883 | /* If the authentication length is less than 16, then it must be wrong for |
884 | * any interpretation of rfc2082. Some implementations also interpret | |
885 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka RIP_AUTH_MD5_COMPAT_SIZE. | |
98fd1e61 | 886 | */ |
ca5e516c | 887 | if ( !((md5->auth_len == RIP_AUTH_MD5_SIZE) |
888 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) | |
c2bfbcc3 | 889 | { |
890 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 891 | zlog_debug ("RIPv2 MD5 authentication, strange authentication " |
ca5e516c | 892 | "length field %d", md5->auth_len); |
718e3744 | 893 | return 0; |
c2bfbcc3 | 894 | } |
718e3744 | 895 | |
ca5e516c | 896 | /* grab and verify check packet length */ |
897 | packet_len = ntohs (md5->packet_len); | |
898 | ||
899 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) | |
900 | { | |
901 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 902 | zlog_debug ("RIPv2 MD5 authentication, packet length field %d " |
ca5e516c | 903 | "greater than received length %d!", |
904 | md5->packet_len, length); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | /* retrieve authentication data */ | |
909 | md5data = (struct rip_md5_data *) (((u_char *) packet) + packet_len); | |
98fd1e61 | 910 | |
911 | memset (auth_str, 0, RIP_AUTH_MD5_SIZE); | |
ca5e516c | 912 | |
718e3744 | 913 | if (ri->key_chain) |
914 | { | |
915 | keychain = keychain_lookup (ri->key_chain); | |
916 | if (keychain == NULL) | |
917 | return 0; | |
918 | ||
919 | key = key_lookup_for_accept (keychain, md5->keyid); | |
920 | if (key == NULL) | |
921 | return 0; | |
922 | ||
98fd1e61 | 923 | strncpy (auth_str, key->string, RIP_AUTH_MD5_SIZE); |
718e3744 | 924 | } |
98fd1e61 | 925 | else if (ri->auth_str) |
926 | strncpy (auth_str, ri->auth_str, RIP_AUTH_MD5_SIZE); | |
718e3744 | 927 | |
fa93b162 | 928 | if (auth_str[0] == 0) |
718e3744 | 929 | return 0; |
98fd1e61 | 930 | |
718e3744 | 931 | /* MD5 digest authentication. */ |
c1a03d47 | 932 | memset (&ctx, 0, sizeof(ctx)); |
933 | MD5Init(&ctx); | |
98fd1e61 | 934 | MD5Update(&ctx, packet, packet_len + RIP_HEADER_SIZE); |
935 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
c1a03d47 | 936 | MD5Final(digest, &ctx); |
98fd1e61 | 937 | |
938 | if (memcmp (md5data->digest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
718e3744 | 939 | return packet_len; |
940 | else | |
941 | return 0; | |
942 | } | |
943 | ||
b14ee00b | 944 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
945 | * (left justified and padded). | |
946 | * | |
947 | * presumes one of ri or key is valid, and that the auth strings they point | |
948 | * to are nul terminated. If neither are present, auth_str will be fully | |
949 | * zero padded. | |
950 | * | |
951 | */ | |
952 | static void | |
953 | rip_auth_prepare_str_send (struct rip_interface *ri, struct key *key, | |
954 | char *auth_str, int len) | |
718e3744 | 955 | { |
b14ee00b | 956 | assert (ri || key); |
718e3744 | 957 | |
b14ee00b | 958 | memset (auth_str, 0, len); |
959 | if (key && key->string) | |
960 | strncpy (auth_str, key->string, len); | |
961 | else if (ri->auth_str) | |
962 | strncpy (auth_str, ri->auth_str, len); | |
718e3744 | 963 | |
b14ee00b | 964 | return; |
965 | } | |
718e3744 | 966 | |
b14ee00b | 967 | /* Write RIPv2 simple password authentication information |
968 | * | |
969 | * auth_str is presumed to be 2 bytes and correctly prepared | |
970 | * (left justified and zero padded). | |
971 | */ | |
972 | static void | |
973 | rip_auth_simple_write (struct stream *s, char *auth_str, int len) | |
974 | { | |
975 | assert (s && len == RIP_AUTH_SIMPLE_SIZE); | |
976 | ||
977 | stream_putw (s, RIP_FAMILY_AUTH); | |
978 | stream_putw (s, RIP_AUTH_SIMPLE_PASSWORD); | |
979 | stream_put (s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
980 | ||
981 | return; | |
982 | } | |
718e3744 | 983 | |
b14ee00b | 984 | /* write RIPv2 MD5 "authentication header" |
985 | * (uses the auth key data field) | |
986 | * | |
987 | * Digest offset field is set to 0. | |
988 | * | |
989 | * returns: offset of the digest offset field, which must be set when | |
990 | * length to the auth-data MD5 digest is known. | |
991 | */ | |
992 | static size_t | |
993 | rip_auth_md5_ah_write (struct stream *s, struct rip_interface *ri, | |
994 | struct key *key) | |
995 | { | |
98fd1e61 | 996 | size_t doff = 0; |
718e3744 | 997 | |
b14ee00b | 998 | assert (s && ri && ri->auth_type == RIP_AUTH_MD5); |
718e3744 | 999 | |
1000 | /* MD5 authentication. */ | |
ca5e516c | 1001 | stream_putw (s, RIP_FAMILY_AUTH); |
718e3744 | 1002 | stream_putw (s, RIP_AUTH_MD5); |
1003 | ||
b14ee00b | 1004 | /* MD5 AH digest offset field. |
1005 | * | |
1006 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
1007 | * is known. Actual value is set in .....(). | |
1008 | */ | |
98fd1e61 | 1009 | doff = stream_get_endp(s); |
b14ee00b | 1010 | stream_putw (s, 0); |
718e3744 | 1011 | |
1012 | /* Key ID. */ | |
1013 | if (key) | |
1014 | stream_putc (s, key->index % 256); | |
1015 | else | |
1016 | stream_putc (s, 1); | |
1017 | ||
ca5e516c | 1018 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds |
1019 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for this | |
1020 | * to be configurable. | |
1021 | */ | |
1022 | stream_putc (s, ri->md5_auth_len); | |
718e3744 | 1023 | |
1024 | /* Sequence Number (non-decreasing). */ | |
1025 | /* RFC2080: The value used in the sequence number is | |
1026 | arbitrary, but two suggestions are the time of the | |
1027 | message's creation or a simple message counter. */ | |
1028 | stream_putl (s, time (NULL)); | |
1029 | ||
1030 | /* Reserved field must be zero. */ | |
1031 | stream_putl (s, 0); | |
1032 | stream_putl (s, 0); | |
1033 | ||
98fd1e61 | 1034 | return doff; |
b14ee00b | 1035 | } |
1036 | ||
1037 | /* If authentication is in used, write the appropriate header | |
1038 | * returns stream offset to which length must later be written | |
1039 | * or 0 if this is not required | |
1040 | */ | |
1041 | static size_t | |
1042 | rip_auth_header_write (struct stream *s, struct rip_interface *ri, | |
1043 | struct key *key, char *auth_str, int len) | |
1044 | { | |
1045 | assert (ri->auth_type != RIP_NO_AUTH); | |
1046 | ||
1047 | switch (ri->auth_type) | |
1048 | { | |
1049 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1050 | rip_auth_prepare_str_send (ri, key, auth_str, len); | |
1051 | rip_auth_simple_write (s, auth_str, len); | |
1052 | return 0; | |
1053 | case RIP_AUTH_MD5: | |
1054 | return rip_auth_md5_ah_write (s, ri, key); | |
1055 | } | |
1056 | assert (1); | |
98fd1e61 | 1057 | return 0; |
b14ee00b | 1058 | } |
1059 | ||
1060 | /* Write RIPv2 MD5 authentication data trailer */ | |
1061 | static void | |
1062 | rip_auth_md5_set (struct stream *s, struct rip_interface *ri, size_t doff, | |
1063 | char *auth_str, int authlen) | |
1064 | { | |
1065 | unsigned long len; | |
c1a03d47 | 1066 | MD5_CTX ctx; |
b14ee00b | 1067 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
718e3744 | 1068 | |
b14ee00b | 1069 | /* Make it sure this interface is configured as MD5 |
1070 | authentication. */ | |
1071 | assert ((ri->auth_type == RIP_AUTH_MD5) && (authlen == RIP_AUTH_MD5_SIZE)); | |
1072 | assert (doff > 0); | |
1073 | ||
1074 | /* Get packet length. */ | |
1075 | len = stream_get_endp(s); | |
1076 | ||
1077 | /* Check packet length. */ | |
1078 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) | |
1079 | { | |
1080 | zlog_err ("rip_auth_md5_set(): packet length %ld is less than minimum length.", len); | |
1081 | return; | |
1082 | } | |
1083 | ||
1084 | /* Set the digest offset length in the header */ | |
1085 | stream_putw_at (s, doff, len); | |
1086 | ||
718e3744 | 1087 | /* Set authentication data. */ |
ca5e516c | 1088 | stream_putw (s, RIP_FAMILY_AUTH); |
1089 | stream_putw (s, RIP_AUTH_DATA); | |
718e3744 | 1090 | |
1091 | /* Generate a digest for the RIP packet. */ | |
c1a03d47 | 1092 | memset(&ctx, 0, sizeof(ctx)); |
1093 | MD5Init(&ctx); | |
98fd1e61 | 1094 | MD5Update(&ctx, STREAM_DATA (s), stream_get_endp (s)); |
c1a03d47 | 1095 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); |
1096 | MD5Final(digest, &ctx); | |
718e3744 | 1097 | |
1098 | /* Copy the digest to the packet. */ | |
1099 | stream_write (s, digest, RIP_AUTH_MD5_SIZE); | |
1100 | } | |
1101 | ||
1102 | /* RIP routing information. */ | |
dc63bfd4 | 1103 | static void |
718e3744 | 1104 | rip_response_process (struct rip_packet *packet, int size, |
c49ad8f1 | 1105 | struct sockaddr_in *from, struct connected *ifc) |
718e3744 | 1106 | { |
1107 | caddr_t lim; | |
1108 | struct rte *rte; | |
727d104b | 1109 | struct prefix_ipv4 ifaddr; |
1110 | struct prefix_ipv4 ifaddrclass; | |
727d104b | 1111 | int subnetted; |
4608cb43 DS |
1112 | |
1113 | memset(&ifaddr, 0, sizeof(ifaddr)); | |
727d104b | 1114 | /* We don't know yet. */ |
1115 | subnetted = -1; | |
1116 | ||
718e3744 | 1117 | /* The Response must be ignored if it is not from the RIP |
1118 | port. (RFC2453 - Sec. 3.9.2)*/ | |
ca5e516c | 1119 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) |
718e3744 | 1120 | { |
1121 | zlog_info ("response doesn't come from RIP port: %d", | |
1122 | from->sin_port); | |
1123 | rip_peer_bad_packet (from); | |
1124 | return; | |
1125 | } | |
1126 | ||
1127 | /* The datagram's IPv4 source address should be checked to see | |
1128 | whether the datagram is from a valid neighbor; the source of the | |
35a60c2d | 1129 | datagram must be on a directly connected network (RFC2453 - Sec. 3.9.2) */ |
0aabccc0 | 1130 | if (if_lookup_address((void *)&from->sin_addr, AF_INET) == NULL) |
718e3744 | 1131 | { |
1132 | zlog_info ("This datagram doesn't came from a valid neighbor: %s", | |
1133 | inet_ntoa (from->sin_addr)); | |
1134 | rip_peer_bad_packet (from); | |
1135 | return; | |
1136 | } | |
1137 | ||
1138 | /* It is also worth checking to see whether the response is from one | |
1139 | of the router's own addresses. */ | |
1140 | ||
1141 | ; /* Alredy done in rip_read () */ | |
1142 | ||
1143 | /* Update RIP peer. */ | |
1144 | rip_peer_update (from, packet->version); | |
1145 | ||
1146 | /* Set RTE pointer. */ | |
1147 | rte = packet->rte; | |
1148 | ||
1149 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) | |
1150 | { | |
1151 | /* RIPv2 authentication check. */ | |
1152 | /* If the Address Family Identifier of the first (and only the | |
1153 | first) entry in the message is 0xFFFF, then the remainder of | |
1154 | the entry contains the authentication. */ | |
1155 | /* If the packet gets here it means authentication enabled */ | |
1156 | /* Check is done in rip_read(). So, just skipping it */ | |
1157 | if (packet->version == RIPv2 && | |
1158 | rte == packet->rte && | |
ca5e516c | 1159 | rte->family == htons(RIP_FAMILY_AUTH)) |
718e3744 | 1160 | continue; |
1161 | ||
ca5e516c | 1162 | if (rte->family != htons(AF_INET)) |
718e3744 | 1163 | { |
1164 | /* Address family check. RIP only supports AF_INET. */ | |
1165 | zlog_info ("Unsupported family %d from %s.", | |
1166 | ntohs (rte->family), inet_ntoa (from->sin_addr)); | |
1167 | continue; | |
1168 | } | |
1169 | ||
1170 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1171 | or 127) */ | |
1172 | if (! rip_destination_check (rte->prefix)) | |
1173 | { | |
1174 | zlog_info ("Network is net 0 or net 127 or it is not unicast network"); | |
1175 | rip_peer_bad_route (from); | |
1176 | continue; | |
1177 | } | |
1178 | ||
1179 | /* Convert metric value to host byte order. */ | |
1180 | rte->metric = ntohl (rte->metric); | |
1181 | ||
1182 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ | |
1183 | if (! (rte->metric >= 1 && rte->metric <= 16)) | |
1184 | { | |
1185 | zlog_info ("Route's metric is not in the 1-16 range."); | |
1186 | rip_peer_bad_route (from); | |
1187 | continue; | |
1188 | } | |
1189 | ||
1190 | /* RIPv1 does not have nexthop value. */ | |
1191 | if (packet->version == RIPv1 && rte->nexthop.s_addr != 0) | |
1192 | { | |
1193 | zlog_info ("RIPv1 packet with nexthop value %s", | |
1194 | inet_ntoa (rte->nexthop)); | |
1195 | rip_peer_bad_route (from); | |
1196 | continue; | |
1197 | } | |
1198 | ||
1199 | /* That is, if the provided information is ignored, a possibly | |
1200 | sub-optimal, but absolutely valid, route may be taken. If | |
1201 | the received Next Hop is not directly reachable, it should be | |
1202 | treated as 0.0.0.0. */ | |
1203 | if (packet->version == RIPv2 && rte->nexthop.s_addr != 0) | |
1204 | { | |
1205 | u_int32_t addrval; | |
1206 | ||
1207 | /* Multicast address check. */ | |
1208 | addrval = ntohl (rte->nexthop.s_addr); | |
1209 | if (IN_CLASSD (addrval)) | |
1210 | { | |
1211 | zlog_info ("Nexthop %s is multicast address, skip this rte", | |
1212 | inet_ntoa (rte->nexthop)); | |
1213 | continue; | |
1214 | } | |
1215 | ||
0aabccc0 | 1216 | if (! if_lookup_address ((void *)&rte->nexthop, AF_INET)) |
718e3744 | 1217 | { |
1218 | struct route_node *rn; | |
1219 | struct rip_info *rinfo; | |
1220 | ||
1221 | rn = route_node_match_ipv4 (rip->table, &rte->nexthop); | |
1222 | ||
1223 | if (rn) | |
1224 | { | |
1225 | rinfo = rn->info; | |
1226 | ||
1227 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1228 | && rinfo->sub_type == RIP_ROUTE_RTE) | |
1229 | { | |
1230 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1231 | zlog_debug ("Next hop %s is on RIP network. Set nexthop to the packet's originator", inet_ntoa (rte->nexthop)); |
718e3744 | 1232 | rte->nexthop = rinfo->from; |
1233 | } | |
1234 | else | |
1235 | { | |
1236 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1237 | zlog_debug ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
718e3744 | 1238 | rte->nexthop.s_addr = 0; |
1239 | } | |
1240 | ||
1241 | route_unlock_node (rn); | |
1242 | } | |
1243 | else | |
1244 | { | |
1245 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1246 | zlog_debug ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
718e3744 | 1247 | rte->nexthop.s_addr = 0; |
1248 | } | |
1249 | ||
1250 | } | |
1251 | } | |
1252 | ||
1253 | /* For RIPv1, there won't be a valid netmask. | |
1254 | ||
1255 | This is a best guess at the masks. If everyone was using old | |
1256 | Ciscos before the 'ip subnet zero' option, it would be almost | |
1257 | right too :-) | |
1258 | ||
1259 | Cisco summarize ripv1 advertisments to the classful boundary | |
1260 | (/16 for class B's) except when the RIP packet does to inside | |
1261 | the classful network in question. */ | |
1262 | ||
1263 | if ((packet->version == RIPv1 && rte->prefix.s_addr != 0) | |
1264 | || (packet->version == RIPv2 | |
1265 | && (rte->prefix.s_addr != 0 && rte->mask.s_addr == 0))) | |
1266 | { | |
1267 | u_int32_t destination; | |
1268 | ||
727d104b | 1269 | if (subnetted == -1) |
c49ad8f1 | 1270 | { |
1271 | memcpy (&ifaddr, ifc->address, sizeof (struct prefix_ipv4)); | |
1272 | memcpy (&ifaddrclass, &ifaddr, sizeof (struct prefix_ipv4)); | |
1273 | apply_classful_mask_ipv4 (&ifaddrclass); | |
1274 | subnetted = 0; | |
1275 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1276 | subnetted = 1; | |
1277 | } | |
727d104b | 1278 | |
1279 | destination = ntohl (rte->prefix.s_addr); | |
1280 | ||
1281 | if (IN_CLASSA (destination)) | |
1282 | masklen2ip (8, &rte->mask); | |
1283 | else if (IN_CLASSB (destination)) | |
1284 | masklen2ip (16, &rte->mask); | |
1285 | else if (IN_CLASSC (destination)) | |
718e3744 | 1286 | masklen2ip (24, &rte->mask); |
727d104b | 1287 | |
1288 | if (subnetted == 1) | |
1289 | masklen2ip (ifaddrclass.prefixlen, | |
1290 | (struct in_addr *) &destination); | |
1291 | if ((subnetted == 1) && ((rte->prefix.s_addr & destination) == | |
1292 | ifaddrclass.prefix.s_addr)) | |
1293 | { | |
1294 | masklen2ip (ifaddr.prefixlen, &rte->mask); | |
1295 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) | |
1296 | masklen2ip (32, &rte->mask); | |
1297 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1298 | zlog_debug ("Subnetted route %s", inet_ntoa (rte->prefix)); |
718e3744 | 1299 | } |
727d104b | 1300 | else |
718e3744 | 1301 | { |
727d104b | 1302 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) |
1303 | continue; | |
718e3744 | 1304 | } |
727d104b | 1305 | |
1306 | if (IS_RIP_DEBUG_EVENT) | |
718e3744 | 1307 | { |
5d6c3779 | 1308 | zlog_debug ("Resultant route %s", inet_ntoa (rte->prefix)); |
1309 | zlog_debug ("Resultant mask %s", inet_ntoa (rte->mask)); | |
718e3744 | 1310 | } |
1311 | } | |
1312 | ||
1313 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1314 | ignore the entry. */ | |
1315 | if ((packet->version == RIPv2) | |
1316 | && (rte->mask.s_addr != 0) | |
1317 | && ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr)) | |
1318 | { | |
1319 | zlog_warn ("RIPv2 address %s is not mask /%d applied one", | |
1320 | inet_ntoa (rte->prefix), ip_masklen (rte->mask)); | |
1321 | rip_peer_bad_route (from); | |
1322 | continue; | |
1323 | } | |
1324 | ||
1325 | /* Default route's netmask is ignored. */ | |
1326 | if (packet->version == RIPv2 | |
1327 | && (rte->prefix.s_addr == 0) | |
1328 | && (rte->mask.s_addr != 0)) | |
1329 | { | |
1330 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1331 | zlog_debug ("Default route with non-zero netmask. Set zero to netmask"); |
718e3744 | 1332 | rte->mask.s_addr = 0; |
1333 | } | |
1334 | ||
1335 | /* Routing table updates. */ | |
c49ad8f1 | 1336 | rip_rte_process (rte, from, ifc->ifp); |
718e3744 | 1337 | } |
1338 | } | |
1339 | ||
a4e987e0 | 1340 | /* Make socket for RIP protocol. */ |
f69bd9da | 1341 | static int |
ae735d2d | 1342 | rip_create_socket (void) |
a4e987e0 | 1343 | { |
1344 | int ret; | |
1345 | int sock; | |
1346 | struct sockaddr_in addr; | |
f69bd9da | 1347 | |
2c61ae37 | 1348 | memset (&addr, 0, sizeof (struct sockaddr_in)); |
ae735d2d RW |
1349 | addr.sin_family = AF_INET; |
1350 | addr.sin_addr.s_addr = INADDR_ANY; | |
6f0e3f6e | 1351 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
ae735d2d | 1352 | addr.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 1353 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
2c61ae37 | 1354 | /* sending port must always be the RIP port */ |
1355 | addr.sin_port = htons (RIP_PORT_DEFAULT); | |
1356 | ||
a4e987e0 | 1357 | /* Make datagram socket. */ |
8578874d | 1358 | sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
a4e987e0 | 1359 | if (sock < 0) |
1360 | { | |
1361 | zlog_err("Cannot create UDP socket: %s", safe_strerror(errno)); | |
1362 | exit (1); | |
1363 | } | |
1364 | ||
1365 | sockopt_broadcast (sock); | |
1366 | sockopt_reuseaddr (sock); | |
1367 | sockopt_reuseport (sock); | |
043144ea | 1368 | setsockopt_ipv4_multicast_loop (sock, 0); |
a4e987e0 | 1369 | #ifdef RIP_RECVMSG |
1370 | setsockopt_pktinfo (sock); | |
1371 | #endif /* RIP_RECVMSG */ | |
78b31d5c SH |
1372 | #ifdef IPTOS_PREC_INTERNETCONTROL |
1373 | setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL); | |
1374 | #endif | |
a4e987e0 | 1375 | |
1376 | if (ripd_privs.change (ZPRIVS_RAISE)) | |
1377 | zlog_err ("rip_create_socket: could not raise privs"); | |
f69bd9da | 1378 | setsockopt_so_recvbuf (sock, RIP_UDP_RCV_BUF); |
1379 | if ( (ret = bind (sock, (struct sockaddr *) & addr, sizeof (addr))) < 0) | |
1380 | ||
a4e987e0 | 1381 | { |
1382 | int save_errno = errno; | |
1383 | if (ripd_privs.change (ZPRIVS_LOWER)) | |
1384 | zlog_err ("rip_create_socket: could not lower privs"); | |
2c61ae37 | 1385 | |
1386 | zlog_err("%s: Can't bind socket %d to %s port %d: %s", __func__, | |
1387 | sock, inet_ntoa(addr.sin_addr), | |
1388 | (int) ntohs(addr.sin_port), | |
1389 | safe_strerror(save_errno)); | |
1390 | ||
f69bd9da | 1391 | close (sock); |
a4e987e0 | 1392 | return ret; |
1393 | } | |
f69bd9da | 1394 | |
a4e987e0 | 1395 | if (ripd_privs.change (ZPRIVS_LOWER)) |
1396 | zlog_err ("rip_create_socket: could not lower privs"); | |
1397 | ||
1398 | return sock; | |
1399 | } | |
1400 | ||
c49ad8f1 | 1401 | /* RIP packet send to destination address, on interface denoted by |
1402 | * by connected argument. NULL to argument denotes destination should be | |
1403 | * should be RIP multicast group | |
1404 | */ | |
dc63bfd4 | 1405 | static int |
c49ad8f1 | 1406 | rip_send_packet (u_char * buf, int size, struct sockaddr_in *to, |
1407 | struct connected *ifc) | |
718e3744 | 1408 | { |
ae735d2d | 1409 | int ret; |
718e3744 | 1410 | struct sockaddr_in sin; |
c49ad8f1 | 1411 | |
1412 | assert (ifc != NULL); | |
1413 | ||
931cd54d | 1414 | if (IS_RIP_DEBUG_PACKET) |
1415 | { | |
f69bd9da | 1416 | #define ADDRESS_SIZE 20 |
1417 | char dst[ADDRESS_SIZE]; | |
1418 | dst[ADDRESS_SIZE - 1] = '\0'; | |
1419 | ||
931cd54d | 1420 | if (to) |
1421 | { | |
f69bd9da | 1422 | strncpy (dst, inet_ntoa(to->sin_addr), ADDRESS_SIZE - 1); |
931cd54d | 1423 | } |
1424 | else | |
1425 | { | |
1426 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); | |
f69bd9da | 1427 | strncpy (dst, inet_ntoa(sin.sin_addr), ADDRESS_SIZE - 1); |
931cd54d | 1428 | } |
f69bd9da | 1429 | #undef ADDRESS_SIZE |
5d6c3779 | 1430 | zlog_debug("rip_send_packet %s > %s (%s)", |
c49ad8f1 | 1431 | inet_ntoa(ifc->address->u.prefix4), |
1432 | dst, ifc->ifp->name); | |
931cd54d | 1433 | } |
f69bd9da | 1434 | |
c49ad8f1 | 1435 | if ( CHECK_FLAG (ifc->flags, ZEBRA_IFA_SECONDARY) ) |
931cd54d | 1436 | { |
1437 | /* | |
1438 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is configured | |
1439 | * with multiple addresses on the same subnet: the first address | |
1440 | * on the subnet is configured "primary", and all subsequent addresses | |
1441 | * on that subnet are treated as "secondary" addresses. | |
1442 | * In order to avoid routing-table bloat on other rip listeners, | |
1443 | * we do not send out RIP packets with ZEBRA_IFA_SECONDARY source addrs. | |
1444 | * XXX Since Linux is the only system for which the ZEBRA_IFA_SECONDARY | |
1445 | * flag is set, we would end up sending a packet for a "secondary" | |
1446 | * source address on non-linux systems. | |
1447 | */ | |
1448 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1449 | zlog_debug("duplicate dropped"); |
931cd54d | 1450 | return 0; |
1451 | } | |
1452 | ||
718e3744 | 1453 | /* Make destination address. */ |
1454 | memset (&sin, 0, sizeof (struct sockaddr_in)); | |
1455 | sin.sin_family = AF_INET; | |
6f0e3f6e | 1456 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
718e3744 | 1457 | sin.sin_len = sizeof (struct sockaddr_in); |
6f0e3f6e | 1458 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 1459 | |
1460 | /* When destination is specified, use it's port and address. */ | |
1461 | if (to) | |
1462 | { | |
718e3744 | 1463 | sin.sin_port = to->sin_port; |
1464 | sin.sin_addr = to->sin_addr; | |
1465 | } | |
1466 | else | |
1467 | { | |
718e3744 | 1468 | sin.sin_port = htons (RIP_PORT_DEFAULT); |
1469 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); | |
ae735d2d RW |
1470 | |
1471 | rip_interface_multicast_set (rip->sock, ifc); | |
718e3744 | 1472 | } |
1473 | ||
ae735d2d | 1474 | ret = sendto (rip->sock, buf, size, 0, (struct sockaddr *)&sin, |
718e3744 | 1475 | sizeof (struct sockaddr_in)); |
1476 | ||
1477 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1478 | zlog_debug ("SEND to %s.%d", inet_ntoa(sin.sin_addr), |
cc1131ab | 1479 | ntohs (sin.sin_port)); |
718e3744 | 1480 | |
1481 | if (ret < 0) | |
6099b3b5 | 1482 | zlog_warn ("can't send packet : %s", safe_strerror (errno)); |
718e3744 | 1483 | |
718e3744 | 1484 | return ret; |
1485 | } | |
1486 | ||
1487 | /* Add redistributed route to RIP table. */ | |
1488 | void | |
1489 | rip_redistribute_add (int type, int sub_type, struct prefix_ipv4 *p, | |
b892f1dd | 1490 | ifindex_t ifindex, struct in_addr *nexthop, |
9471675f CF |
1491 | unsigned int metric, unsigned char distance, |
1492 | route_tag_t tag) | |
718e3744 | 1493 | { |
1494 | int ret; | |
bce8e868 LF |
1495 | struct route_node *rp = NULL; |
1496 | struct rip_info *rinfo = NULL, newinfo; | |
1497 | struct list *list = NULL; | |
718e3744 | 1498 | |
1499 | /* Redistribute route */ | |
1500 | ret = rip_destination_check (p->prefix); | |
1501 | if (! ret) | |
1502 | return; | |
1503 | ||
1504 | rp = route_node_get (rip->table, (struct prefix *) p); | |
1505 | ||
bce8e868 LF |
1506 | memset (&newinfo, 0, sizeof (struct rip_info)); |
1507 | newinfo.type = type; | |
1508 | newinfo.sub_type = sub_type; | |
1509 | newinfo.ifindex = ifindex; | |
1510 | newinfo.metric = 1; | |
1511 | newinfo.external_metric = metric; | |
1512 | newinfo.distance = distance; | |
9471675f CF |
1513 | if (tag <= UINT16_MAX) /* RIP only supports 16 bit tags */ |
1514 | newinfo.tag = tag; | |
bce8e868 LF |
1515 | newinfo.rp = rp; |
1516 | if (nexthop) | |
1517 | newinfo.nexthop = *nexthop; | |
718e3744 | 1518 | |
bce8e868 | 1519 | if ((list = rp->info) != NULL && listcount (list) != 0) |
718e3744 | 1520 | { |
bce8e868 LF |
1521 | rinfo = listgetdata (listhead (list)); |
1522 | ||
718e3744 | 1523 | if (rinfo->type == ZEBRA_ROUTE_CONNECT |
1524 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1525 | && rinfo->metric != RIP_METRIC_INFINITY) | |
1526 | { | |
1527 | route_unlock_node (rp); | |
1528 | return; | |
1529 | } | |
1530 | ||
1531 | /* Manually configured RIP route check. */ | |
1532 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
16705130 | 1533 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
1534 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) ) | |
718e3744 | 1535 | { |
16705130 | 1536 | if (type != ZEBRA_ROUTE_RIP || ((sub_type != RIP_ROUTE_STATIC) && |
1537 | (sub_type != RIP_ROUTE_DEFAULT))) | |
718e3744 | 1538 | { |
1539 | route_unlock_node (rp); | |
1540 | return; | |
1541 | } | |
1542 | } | |
1543 | ||
bce8e868 LF |
1544 | rinfo = rip_ecmp_replace (&newinfo); |
1545 | route_unlock_node (rp); | |
718e3744 | 1546 | } |
bce8e868 LF |
1547 | else |
1548 | rinfo = rip_ecmp_add (&newinfo); | |
718e3744 | 1549 | |
16705130 | 1550 | if (IS_RIP_DEBUG_EVENT) { |
1551 | if (!nexthop) | |
5d6c3779 | 1552 | zlog_debug ("Redistribute new prefix %s/%d on the interface %s", |
16705130 | 1553 | inet_ntoa(p->prefix), p->prefixlen, |
1554 | ifindex2ifname(ifindex)); | |
1555 | else | |
5d6c3779 | 1556 | zlog_debug ("Redistribute new prefix %s/%d with nexthop %s on the interface %s", |
16705130 | 1557 | inet_ntoa(p->prefix), p->prefixlen, inet_ntoa(rinfo->nexthop), |
1558 | ifindex2ifname(ifindex)); | |
1559 | } | |
1560 | ||
718e3744 | 1561 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
1562 | } | |
1563 | ||
1564 | /* Delete redistributed route from RIP table. */ | |
1565 | void | |
1566 | rip_redistribute_delete (int type, int sub_type, struct prefix_ipv4 *p, | |
b892f1dd | 1567 | ifindex_t ifindex) |
718e3744 | 1568 | { |
1569 | int ret; | |
1570 | struct route_node *rp; | |
1571 | struct rip_info *rinfo; | |
1572 | ||
1573 | ret = rip_destination_check (p->prefix); | |
1574 | if (! ret) | |
1575 | return; | |
1576 | ||
1577 | rp = route_node_lookup (rip->table, (struct prefix *) p); | |
1578 | if (rp) | |
1579 | { | |
bce8e868 | 1580 | struct list *list = rp->info; |
718e3744 | 1581 | |
bce8e868 LF |
1582 | if (list != NULL && listcount (list) != 0) |
1583 | { | |
1584 | rinfo = listgetdata (listhead (list)); | |
1585 | if (rinfo != NULL | |
1586 | && rinfo->type == type | |
1587 | && rinfo->sub_type == sub_type | |
1588 | && rinfo->ifindex == ifindex) | |
1589 | { | |
1590 | /* Perform poisoned reverse. */ | |
1591 | rinfo->metric = RIP_METRIC_INFINITY; | |
1592 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
1593 | rip_garbage_collect, rip->garbage_time); | |
1594 | RIP_TIMER_OFF (rinfo->t_timeout); | |
1595 | rinfo->flags |= RIP_RTF_CHANGED; | |
718e3744 | 1596 | |
bce8e868 LF |
1597 | if (IS_RIP_DEBUG_EVENT) |
1598 | zlog_debug ("Poisone %s/%d on the interface %s with an " | |
1599 | "infinity metric [delete]", | |
1600 | inet_ntoa(p->prefix), p->prefixlen, | |
1601 | ifindex2ifname(ifindex)); | |
16705130 | 1602 | |
bce8e868 LF |
1603 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
1604 | } | |
1605 | } | |
1606 | route_unlock_node (rp); | |
718e3744 | 1607 | } |
1608 | } | |
1609 | ||
1610 | /* Response to request called from rip_read ().*/ | |
dc63bfd4 | 1611 | static void |
718e3744 | 1612 | rip_request_process (struct rip_packet *packet, int size, |
c49ad8f1 | 1613 | struct sockaddr_in *from, struct connected *ifc) |
718e3744 | 1614 | { |
1615 | caddr_t lim; | |
1616 | struct rte *rte; | |
1617 | struct prefix_ipv4 p; | |
1618 | struct route_node *rp; | |
1619 | struct rip_info *rinfo; | |
1620 | struct rip_interface *ri; | |
1621 | ||
16705130 | 1622 | /* Does not reponse to the requests on the loopback interfaces */ |
c49ad8f1 | 1623 | if (if_is_loopback (ifc->ifp)) |
16705130 | 1624 | return; |
1625 | ||
429a0f8c | 1626 | /* Check RIP process is enabled on this interface. */ |
c49ad8f1 | 1627 | ri = ifc->ifp->info; |
16705130 | 1628 | if (! ri->running) |
1629 | return; | |
718e3744 | 1630 | |
1631 | /* When passive interface is specified, suppress responses */ | |
1632 | if (ri->passive) | |
1633 | return; | |
c49ad8f1 | 1634 | |
718e3744 | 1635 | /* RIP peer update. */ |
1636 | rip_peer_update (from, packet->version); | |
1637 | ||
1638 | lim = ((caddr_t) packet) + size; | |
1639 | rte = packet->rte; | |
1640 | ||
1641 | /* The Request is processed entry by entry. If there are no | |
1642 | entries, no response is given. */ | |
1643 | if (lim == (caddr_t) rte) | |
1644 | return; | |
1645 | ||
1646 | /* There is one special case. If there is exactly one entry in the | |
1647 | request, and it has an address family identifier of zero and a | |
1648 | metric of infinity (i.e., 16), then this is a request to send the | |
1649 | entire routing table. */ | |
1650 | if (lim == ((caddr_t) (rte + 1)) && | |
1651 | ntohs (rte->family) == 0 && | |
1652 | ntohl (rte->metric) == RIP_METRIC_INFINITY) | |
1653 | { | |
1654 | /* All route with split horizon */ | |
c49ad8f1 | 1655 | rip_output_process (ifc, from, rip_all_route, packet->version); |
718e3744 | 1656 | } |
1657 | else | |
1658 | { | |
4e054866 RW |
1659 | if (ntohs (rte->family) != AF_INET) |
1660 | return; | |
1661 | ||
718e3744 | 1662 | /* Examine the list of RTEs in the Request one by one. For each |
1663 | entry, look up the destination in the router's routing | |
1664 | database and, if there is a route, put that route's metric in | |
1665 | the metric field of the RTE. If there is no explicit route | |
1666 | to the specified destination, put infinity in the metric | |
1667 | field. Once all the entries have been filled in, change the | |
1668 | command from Request to Response and send the datagram back | |
1669 | to the requestor. */ | |
1670 | p.family = AF_INET; | |
1671 | ||
1672 | for (; ((caddr_t) rte) < lim; rte++) | |
1673 | { | |
1674 | p.prefix = rte->prefix; | |
1675 | p.prefixlen = ip_masklen (rte->mask); | |
1676 | apply_mask_ipv4 (&p); | |
1677 | ||
1678 | rp = route_node_lookup (rip->table, (struct prefix *) &p); | |
1679 | if (rp) | |
1680 | { | |
bce8e868 | 1681 | rinfo = listgetdata (listhead ((struct list *)rp->info)); |
718e3744 | 1682 | rte->metric = htonl (rinfo->metric); |
1683 | route_unlock_node (rp); | |
1684 | } | |
1685 | else | |
1686 | rte->metric = htonl (RIP_METRIC_INFINITY); | |
1687 | } | |
1688 | packet->command = RIP_RESPONSE; | |
1689 | ||
c49ad8f1 | 1690 | rip_send_packet ((u_char *)packet, size, from, ifc); |
718e3744 | 1691 | } |
1692 | rip_global_queries++; | |
1693 | } | |
1694 | ||
1695 | #if RIP_RECVMSG | |
1696 | /* Set IPv6 packet info to the socket. */ | |
1697 | static int | |
1698 | setsockopt_pktinfo (int sock) | |
1699 | { | |
1700 | int ret; | |
1701 | int val = 1; | |
1702 | ||
1703 | ret = setsockopt(sock, IPPROTO_IP, IP_PKTINFO, &val, sizeof(val)); | |
1704 | if (ret < 0) | |
6099b3b5 | 1705 | zlog_warn ("Can't setsockopt IP_PKTINFO : %s", safe_strerror (errno)); |
718e3744 | 1706 | return ret; |
1707 | } | |
1708 | ||
1709 | /* Read RIP packet by recvmsg function. */ | |
1710 | int | |
1711 | rip_recvmsg (int sock, u_char *buf, int size, struct sockaddr_in *from, | |
b892f1dd | 1712 | ifindex_t *ifindex) |
718e3744 | 1713 | { |
1714 | int ret; | |
1715 | struct msghdr msg; | |
1716 | struct iovec iov; | |
1717 | struct cmsghdr *ptr; | |
1718 | char adata[1024]; | |
1719 | ||
1720 | msg.msg_name = (void *) from; | |
1721 | msg.msg_namelen = sizeof (struct sockaddr_in); | |
1722 | msg.msg_iov = &iov; | |
1723 | msg.msg_iovlen = 1; | |
1724 | msg.msg_control = (void *) adata; | |
1725 | msg.msg_controllen = sizeof adata; | |
1726 | iov.iov_base = buf; | |
1727 | iov.iov_len = size; | |
1728 | ||
1729 | ret = recvmsg (sock, &msg, 0); | |
1730 | if (ret < 0) | |
1731 | return ret; | |
1732 | ||
b99760ab | 1733 | for (ptr = ZCMSG_FIRSTHDR(&msg); ptr != NULL; ptr = CMSG_NXTHDR(&msg, ptr)) |
718e3744 | 1734 | if (ptr->cmsg_level == IPPROTO_IP && ptr->cmsg_type == IP_PKTINFO) |
1735 | { | |
1736 | struct in_pktinfo *pktinfo; | |
1737 | int i; | |
1738 | ||
1739 | pktinfo = (struct in_pktinfo *) CMSG_DATA (ptr); | |
1740 | i = pktinfo->ipi_ifindex; | |
1741 | } | |
1742 | return ret; | |
1743 | } | |
1744 | ||
1745 | /* RIP packet read function. */ | |
1746 | int | |
1747 | rip_read_new (struct thread *t) | |
1748 | { | |
1749 | int ret; | |
1750 | int sock; | |
1751 | char buf[RIP_PACKET_MAXSIZ]; | |
1752 | struct sockaddr_in from; | |
b892f1dd | 1753 | ifindex_t ifindex; |
718e3744 | 1754 | |
1755 | /* Fetch socket then register myself. */ | |
1756 | sock = THREAD_FD (t); | |
1757 | rip_event (RIP_READ, sock); | |
1758 | ||
1759 | /* Read RIP packet. */ | |
1760 | ret = rip_recvmsg (sock, buf, RIP_PACKET_MAXSIZ, &from, (int *)&ifindex); | |
1761 | if (ret < 0) | |
1762 | { | |
6099b3b5 | 1763 | zlog_warn ("Can't read RIP packet: %s", safe_strerror (errno)); |
718e3744 | 1764 | return ret; |
1765 | } | |
1766 | ||
1767 | return ret; | |
1768 | } | |
1769 | #endif /* RIP_RECVMSG */ | |
1770 | ||
1771 | /* First entry point of RIP packet. */ | |
dc63bfd4 | 1772 | static int |
718e3744 | 1773 | rip_read (struct thread *t) |
1774 | { | |
1775 | int sock; | |
1776 | int ret; | |
1777 | int rtenum; | |
1778 | union rip_buf rip_buf; | |
1779 | struct rip_packet *packet; | |
1780 | struct sockaddr_in from; | |
11dde9c2 | 1781 | int len; |
3e557ae1 | 1782 | int vrecv; |
11dde9c2 | 1783 | socklen_t fromlen; |
b10ce841 | 1784 | struct interface *ifp = NULL; |
c49ad8f1 | 1785 | struct connected *ifc; |
718e3744 | 1786 | struct rip_interface *ri; |
bd40c341 | 1787 | struct prefix p; |
718e3744 | 1788 | |
1789 | /* Fetch socket then register myself. */ | |
1790 | sock = THREAD_FD (t); | |
1791 | rip->t_read = NULL; | |
1792 | ||
1793 | /* Add myself to tne next event */ | |
1794 | rip_event (RIP_READ, sock); | |
1795 | ||
1796 | /* RIPd manages only IPv4. */ | |
1797 | memset (&from, 0, sizeof (struct sockaddr_in)); | |
1798 | fromlen = sizeof (struct sockaddr_in); | |
1799 | ||
1800 | len = recvfrom (sock, (char *)&rip_buf.buf, sizeof (rip_buf.buf), 0, | |
1801 | (struct sockaddr *) &from, &fromlen); | |
1802 | if (len < 0) | |
1803 | { | |
6099b3b5 | 1804 | zlog_info ("recvfrom failed: %s", safe_strerror (errno)); |
718e3744 | 1805 | return len; |
1806 | } | |
1807 | ||
1808 | /* Check is this packet comming from myself? */ | |
31a476c7 | 1809 | if (if_check_address (from.sin_addr)) |
718e3744 | 1810 | { |
1811 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1812 | zlog_debug ("ignore packet comes from myself"); |
718e3744 | 1813 | return -1; |
1814 | } | |
1815 | ||
1816 | /* Which interface is this packet comes from. */ | |
b10ce841 RW |
1817 | ifc = if_lookup_address ((void *)&from.sin_addr, AF_INET); |
1818 | if (ifc) | |
1819 | ifp = ifc->ifp; | |
1820 | ||
718e3744 | 1821 | /* RIP packet received */ |
1822 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1823 | zlog_debug ("RECV packet from %s port %d on %s", |
718e3744 | 1824 | inet_ntoa (from.sin_addr), ntohs (from.sin_port), |
1825 | ifp ? ifp->name : "unknown"); | |
1826 | ||
1827 | /* If this packet come from unknown interface, ignore it. */ | |
1828 | if (ifp == NULL) | |
1829 | { | |
766a0ca3 | 1830 | zlog_info ("rip_read: cannot find interface for packet from %s port %d", |
1831 | inet_ntoa(from.sin_addr), ntohs (from.sin_port)); | |
c49ad8f1 | 1832 | return -1; |
1833 | } | |
bd40c341 DS |
1834 | |
1835 | p.family = AF_INET; | |
1836 | p.u.prefix4 = from.sin_addr; | |
1837 | p.prefixlen = IPV4_MAX_BITLEN; | |
1838 | ||
1839 | ifc = connected_lookup_prefix (ifp, &p); | |
c49ad8f1 | 1840 | |
1841 | if (ifc == NULL) | |
1842 | { | |
766a0ca3 | 1843 | zlog_info ("rip_read: cannot find connected address for packet from %s " |
1844 | "port %d on interface %s", | |
1845 | inet_ntoa(from.sin_addr), ntohs (from.sin_port), ifp->name); | |
718e3744 | 1846 | return -1; |
1847 | } | |
1848 | ||
1849 | /* Packet length check. */ | |
1850 | if (len < RIP_PACKET_MINSIZ) | |
1851 | { | |
1852 | zlog_warn ("packet size %d is smaller than minimum size %d", | |
1853 | len, RIP_PACKET_MINSIZ); | |
1854 | rip_peer_bad_packet (&from); | |
1855 | return len; | |
1856 | } | |
1857 | if (len > RIP_PACKET_MAXSIZ) | |
1858 | { | |
1859 | zlog_warn ("packet size %d is larger than max size %d", | |
1860 | len, RIP_PACKET_MAXSIZ); | |
1861 | rip_peer_bad_packet (&from); | |
1862 | return len; | |
1863 | } | |
1864 | ||
1865 | /* Packet alignment check. */ | |
1866 | if ((len - RIP_PACKET_MINSIZ) % 20) | |
1867 | { | |
1868 | zlog_warn ("packet size %d is wrong for RIP packet alignment", len); | |
1869 | rip_peer_bad_packet (&from); | |
1870 | return len; | |
1871 | } | |
1872 | ||
1873 | /* Set RTE number. */ | |
1874 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1875 | ||
1876 | /* For easy to handle. */ | |
1877 | packet = &rip_buf.rip_packet; | |
1878 | ||
1879 | /* RIP version check. */ | |
1880 | if (packet->version == 0) | |
1881 | { | |
1882 | zlog_info ("version 0 with command %d received.", packet->command); | |
1883 | rip_peer_bad_packet (&from); | |
1884 | return -1; | |
1885 | } | |
1886 | ||
1887 | /* Dump RIP packet. */ | |
1888 | if (IS_RIP_DEBUG_RECV) | |
1889 | rip_packet_dump (packet, len, "RECV"); | |
1890 | ||
1891 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1892 | that "Version 1 implementations are to ignore this extra data and | |
1893 | process only the fields specified in this document.". So RIPv3 | |
1894 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1895 | if (packet->version > RIPv2) | |
1896 | packet->version = RIPv2; | |
1897 | ||
1898 | /* Is RIP running or is this RIP neighbor ?*/ | |
1899 | ri = ifp->info; | |
1900 | if (! ri->running && ! rip_neighbor_lookup (&from)) | |
1901 | { | |
1902 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1903 | zlog_debug ("RIP is not enabled on interface %s.", ifp->name); |
718e3744 | 1904 | rip_peer_bad_packet (&from); |
1905 | return -1; | |
1906 | } | |
1907 | ||
15a2b089 | 1908 | /* RIP Version check. RFC2453, 4.6 and 5.1 */ |
3e557ae1 PJ |
1909 | vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? |
1910 | rip->version_recv : ri->ri_receive); | |
6aec4b41 RW |
1911 | if (vrecv == RI_RIP_VERSION_NONE || |
1912 | ((packet->version == RIPv1) && !(vrecv & RIPv1)) || | |
1913 | ((packet->version == RIPv2) && !(vrecv & RIPv2))) | |
15a2b089 PJ |
1914 | { |
1915 | if (IS_RIP_DEBUG_PACKET) | |
1916 | zlog_debug (" packet's v%d doesn't fit to if version spec", | |
1917 | packet->version); | |
1918 | rip_peer_bad_packet (&from); | |
1919 | return -1; | |
1920 | } | |
1921 | ||
718e3744 | 1922 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 |
1923 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
1924 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
718e3744 | 1925 | if ((ri->auth_type == RIP_NO_AUTH) |
1926 | && rtenum | |
ca5e516c | 1927 | && (packet->version == RIPv2) |
1928 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) | |
718e3744 | 1929 | { |
1930 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1931 | zlog_debug ("packet RIPv%d is dropped because authentication disabled", |
718e3744 | 1932 | packet->version); |
1933 | rip_peer_bad_packet (&from); | |
1934 | return -1; | |
1935 | } | |
15a2b089 PJ |
1936 | |
1937 | /* RFC: | |
1938 | If the router is configured to authenticate RIP-2 messages, then | |
718e3744 | 1939 | RIP-1 messages and RIP-2 messages which pass authentication |
1940 | testing shall be accepted; unauthenticated and failed | |
1941 | authentication RIP-2 messages shall be discarded. For maximum | |
1942 | security, RIP-1 messages should be ignored when authentication is | |
1943 | in use (see section 4.1); otherwise, the routing information from | |
1944 | authenticated messages will be propagated by RIP-1 routers in an | |
15a2b089 PJ |
1945 | unauthenticated manner. |
1946 | */ | |
1947 | /* We make an exception for RIPv1 REQUEST packets, to which we'll | |
1948 | * always reply regardless of authentication settings, because: | |
1949 | * | |
1950 | * - if there other authorised routers on-link, the REQUESTor can | |
1951 | * passively obtain the routing updates anyway | |
1952 | * - if there are no other authorised routers on-link, RIP can | |
1953 | * easily be disabled for the link to prevent giving out information | |
1954 | * on state of this routers RIP routing table.. | |
1955 | * | |
1956 | * I.e. if RIPv1 has any place anymore these days, it's as a very | |
1957 | * simple way to distribute routing information (e.g. to embedded | |
1958 | * hosts / appliances) and the ability to give out RIPv1 | |
1959 | * routing-information freely, while still requiring RIPv2 | |
1960 | * authentication for any RESPONSEs might be vaguely useful. | |
1961 | */ | |
1962 | if (ri->auth_type != RIP_NO_AUTH | |
1963 | && packet->version == RIPv1) | |
718e3744 | 1964 | { |
15a2b089 PJ |
1965 | /* Discard RIPv1 messages other than REQUESTs */ |
1966 | if (packet->command != RIP_REQUEST) | |
1967 | { | |
1968 | if (IS_RIP_DEBUG_PACKET) | |
1969 | zlog_debug ("RIPv1" " dropped because authentication enabled"); | |
1970 | rip_peer_bad_packet (&from); | |
1971 | return -1; | |
1972 | } | |
1973 | } | |
1974 | else if (ri->auth_type != RIP_NO_AUTH) | |
1975 | { | |
1976 | const char *auth_desc; | |
1977 | ||
1978 | if (rtenum == 0) | |
1979 | { | |
1980 | /* There definitely is no authentication in the packet. */ | |
1981 | if (IS_RIP_DEBUG_PACKET) | |
1982 | zlog_debug ("RIPv2 authentication failed: no auth RTE in packet"); | |
1983 | rip_peer_bad_packet (&from); | |
1984 | return -1; | |
1985 | } | |
1986 | ||
1987 | /* First RTE must be an Authentication Family RTE */ | |
1988 | if (packet->rte->family != htons(RIP_FAMILY_AUTH)) | |
1989 | { | |
1990 | if (IS_RIP_DEBUG_PACKET) | |
1991 | zlog_debug ("RIPv2" " dropped because authentication enabled"); | |
718e3744 | 1992 | rip_peer_bad_packet (&from); |
1993 | return -1; | |
15a2b089 PJ |
1994 | } |
1995 | ||
718e3744 | 1996 | /* Check RIPv2 authentication. */ |
15a2b089 PJ |
1997 | switch (ntohs(packet->rte->tag)) |
1998 | { | |
1999 | case RIP_AUTH_SIMPLE_PASSWORD: | |
2000 | auth_desc = "simple"; | |
2001 | ret = rip_auth_simple_password (packet->rte, &from, ifp); | |
2002 | break; | |
2003 | ||
2004 | case RIP_AUTH_MD5: | |
2005 | auth_desc = "MD5"; | |
2006 | ret = rip_auth_md5 (packet, &from, len, ifp); | |
2007 | /* Reset RIP packet length to trim MD5 data. */ | |
2008 | len = ret; | |
2009 | break; | |
2010 | ||
2011 | default: | |
2012 | ret = 0; | |
2013 | auth_desc = "unknown type"; | |
2014 | if (IS_RIP_DEBUG_PACKET) | |
2015 | zlog_debug ("RIPv2 Unknown authentication type %d", | |
2016 | ntohs (packet->rte->tag)); | |
2017 | } | |
2018 | ||
2019 | if (ret) | |
2020 | { | |
2021 | if (IS_RIP_DEBUG_PACKET) | |
2022 | zlog_debug ("RIPv2 %s authentication success", auth_desc); | |
2023 | } | |
2024 | else | |
2025 | { | |
2026 | if (IS_RIP_DEBUG_PACKET) | |
2027 | zlog_debug ("RIPv2 %s authentication failure", auth_desc); | |
2028 | rip_peer_bad_packet (&from); | |
2029 | return -1; | |
2030 | } | |
718e3744 | 2031 | } |
2032 | ||
2033 | /* Process each command. */ | |
2034 | switch (packet->command) | |
2035 | { | |
2036 | case RIP_RESPONSE: | |
c49ad8f1 | 2037 | rip_response_process (packet, len, &from, ifc); |
718e3744 | 2038 | break; |
2039 | case RIP_REQUEST: | |
2040 | case RIP_POLL: | |
c49ad8f1 | 2041 | rip_request_process (packet, len, &from, ifc); |
718e3744 | 2042 | break; |
2043 | case RIP_TRACEON: | |
2044 | case RIP_TRACEOFF: | |
2045 | zlog_info ("Obsolete command %s received, please sent it to routed", | |
2046 | lookup (rip_msg, packet->command)); | |
2047 | rip_peer_bad_packet (&from); | |
2048 | break; | |
2049 | case RIP_POLL_ENTRY: | |
2050 | zlog_info ("Obsolete command %s received", | |
2051 | lookup (rip_msg, packet->command)); | |
2052 | rip_peer_bad_packet (&from); | |
2053 | break; | |
2054 | default: | |
2055 | zlog_info ("Unknown RIP command %d received", packet->command); | |
2056 | rip_peer_bad_packet (&from); | |
2057 | break; | |
2058 | } | |
2059 | ||
2060 | return len; | |
2061 | } | |
2062 | ||
718e3744 | 2063 | /* Write routing table entry to the stream and return next index of |
2064 | the routing table entry in the stream. */ | |
dc63bfd4 | 2065 | static int |
718e3744 | 2066 | rip_write_rte (int num, struct stream *s, struct prefix_ipv4 *p, |
b14ee00b | 2067 | u_char version, struct rip_info *rinfo) |
718e3744 | 2068 | { |
2069 | struct in_addr mask; | |
718e3744 | 2070 | |
2071 | /* Write routing table entry. */ | |
2072 | if (version == RIPv1) | |
2073 | { | |
2074 | stream_putw (s, AF_INET); | |
2075 | stream_putw (s, 0); | |
2076 | stream_put_ipv4 (s, p->prefix.s_addr); | |
2077 | stream_put_ipv4 (s, 0); | |
2078 | stream_put_ipv4 (s, 0); | |
2079 | stream_putl (s, rinfo->metric_out); | |
2080 | } | |
2081 | else | |
2082 | { | |
2083 | masklen2ip (p->prefixlen, &mask); | |
2084 | ||
2085 | stream_putw (s, AF_INET); | |
16705130 | 2086 | stream_putw (s, rinfo->tag_out); |
718e3744 | 2087 | stream_put_ipv4 (s, p->prefix.s_addr); |
2088 | stream_put_ipv4 (s, mask.s_addr); | |
2089 | stream_put_ipv4 (s, rinfo->nexthop_out.s_addr); | |
2090 | stream_putl (s, rinfo->metric_out); | |
2091 | } | |
2092 | ||
2093 | return ++num; | |
2094 | } | |
2095 | ||
2096 | /* Send update to the ifp or spcified neighbor. */ | |
2097 | void | |
c49ad8f1 | 2098 | rip_output_process (struct connected *ifc, struct sockaddr_in *to, |
2099 | int route_type, u_char version) | |
718e3744 | 2100 | { |
2101 | int ret; | |
2102 | struct stream *s; | |
2103 | struct route_node *rp; | |
2104 | struct rip_info *rinfo; | |
2105 | struct rip_interface *ri; | |
2106 | struct prefix_ipv4 *p; | |
2107 | struct prefix_ipv4 classfull; | |
727d104b | 2108 | struct prefix_ipv4 ifaddrclass; |
b14ee00b | 2109 | struct key *key = NULL; |
2110 | /* this might need to made dynamic if RIP ever supported auth methods | |
2111 | with larger key string sizes */ | |
2112 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
dc63bfd4 | 2113 | size_t doff = 0; /* offset of digest offset field */ |
2c61ae37 | 2114 | int num = 0; |
718e3744 | 2115 | int rtemax; |
01d0908a | 2116 | int subnetted = 0; |
bce8e868 LF |
2117 | struct list *list = NULL; |
2118 | struct listnode *listnode = NULL; | |
718e3744 | 2119 | |
2120 | /* Logging output event. */ | |
2121 | if (IS_RIP_DEBUG_EVENT) | |
2122 | { | |
2123 | if (to) | |
5d6c3779 | 2124 | zlog_debug ("update routes to neighbor %s", inet_ntoa (to->sin_addr)); |
718e3744 | 2125 | else |
5d6c3779 | 2126 | zlog_debug ("update routes on interface %s ifindex %d", |
c49ad8f1 | 2127 | ifc->ifp->name, ifc->ifp->ifindex); |
718e3744 | 2128 | } |
2129 | ||
2130 | /* Set output stream. */ | |
2131 | s = rip->obuf; | |
2132 | ||
2133 | /* Reset stream and RTE counter. */ | |
2134 | stream_reset (s); | |
6a7cff75 | 2135 | rtemax = RIP_MAX_RTE; |
718e3744 | 2136 | |
2137 | /* Get RIP interface. */ | |
c49ad8f1 | 2138 | ri = ifc->ifp->info; |
718e3744 | 2139 | |
2140 | /* If output interface is in simple password authentication mode, we | |
2141 | need space for authentication data. */ | |
2142 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2143 | rtemax -= 1; | |
2144 | ||
2145 | /* If output interface is in MD5 authentication mode, we need space | |
2146 | for authentication header and data. */ | |
2147 | if (ri->auth_type == RIP_AUTH_MD5) | |
2148 | rtemax -= 2; | |
2149 | ||
2150 | /* If output interface is in simple password authentication mode | |
2151 | and string or keychain is specified we need space for auth. data */ | |
b14ee00b | 2152 | if (ri->auth_type != RIP_NO_AUTH) |
718e3744 | 2153 | { |
2154 | if (ri->key_chain) | |
2155 | { | |
2156 | struct keychain *keychain; | |
2157 | ||
2158 | keychain = keychain_lookup (ri->key_chain); | |
2159 | if (keychain) | |
b14ee00b | 2160 | key = key_lookup_for_send (keychain); |
718e3744 | 2161 | } |
b14ee00b | 2162 | /* to be passed to auth functions later */ |
2163 | rip_auth_prepare_str_send (ri, key, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
718e3744 | 2164 | } |
2165 | ||
727d104b | 2166 | if (version == RIPv1) |
2167 | { | |
c49ad8f1 | 2168 | memcpy (&ifaddrclass, ifc->address, sizeof (struct prefix_ipv4)); |
727d104b | 2169 | apply_classful_mask_ipv4 (&ifaddrclass); |
2170 | subnetted = 0; | |
c49ad8f1 | 2171 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) |
01d0908a | 2172 | subnetted = 1; |
727d104b | 2173 | } |
2174 | ||
718e3744 | 2175 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
bce8e868 | 2176 | if ((list = rp->info) != NULL && listcount (list) != 0) |
718e3744 | 2177 | { |
bce8e868 | 2178 | rinfo = listgetdata (listhead (list)); |
727d104b | 2179 | /* For RIPv1, if we are subnetted, output subnets in our network */ |
2180 | /* that have the same mask as the output "interface". For other */ | |
2181 | /* networks, only the classfull version is output. */ | |
718e3744 | 2182 | |
2183 | if (version == RIPv1) | |
2184 | { | |
727d104b | 2185 | p = (struct prefix_ipv4 *) &rp->p; |
718e3744 | 2186 | |
2187 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2188 | zlog_debug("RIPv1 mask check, %s/%d considered for output", |
727d104b | 2189 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
718e3744 | 2190 | |
727d104b | 2191 | if (subnetted && |
2192 | prefix_match ((struct prefix *) &ifaddrclass, &rp->p)) | |
2193 | { | |
c49ad8f1 | 2194 | if ((ifc->address->prefixlen != rp->p.prefixlen) && |
727d104b | 2195 | (rp->p.prefixlen != 32)) |
2196 | continue; | |
2197 | } | |
2198 | else | |
2199 | { | |
2200 | memcpy (&classfull, &rp->p, sizeof(struct prefix_ipv4)); | |
2201 | apply_classful_mask_ipv4(&classfull); | |
2202 | if (rp->p.u.prefix4.s_addr != 0 && | |
2203 | classfull.prefixlen != rp->p.prefixlen) | |
2204 | continue; | |
2205 | } | |
718e3744 | 2206 | if (IS_RIP_DEBUG_PACKET) |
5d6c3779 | 2207 | zlog_debug("RIPv1 mask check, %s/%d made it through", |
727d104b | 2208 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
718e3744 | 2209 | } |
2210 | else | |
2211 | p = (struct prefix_ipv4 *) &rp->p; | |
2212 | ||
2213 | /* Apply output filters. */ | |
7c989d74 | 2214 | ret = rip_filter (RIP_FILTER_OUT, p, ri); |
718e3744 | 2215 | if (ret < 0) |
2216 | continue; | |
2217 | ||
2218 | /* Changed route only output. */ | |
2219 | if (route_type == rip_changed_route && | |
2220 | (! (rinfo->flags & RIP_RTF_CHANGED))) | |
2221 | continue; | |
2222 | ||
2223 | /* Split horizon. */ | |
2224 | /* if (split_horizon == rip_split_horizon) */ | |
16705130 | 2225 | if (ri->split_horizon == RIP_SPLIT_HORIZON) |
718e3744 | 2226 | { |
42d14d98 | 2227 | /* |
2228 | * We perform split horizon for RIP and connected route. | |
2229 | * For rip routes, we want to suppress the route if we would | |
2230 | * end up sending the route back on the interface that we | |
2231 | * learned it from, with a higher metric. For connected routes, | |
2232 | * we suppress the route if the prefix is a subset of the | |
2233 | * source address that we are going to use for the packet | |
2234 | * (in order to handle the case when multiple subnets are | |
2235 | * configured on the same interface). | |
2236 | */ | |
bce8e868 LF |
2237 | int suppress = 0; |
2238 | struct rip_info *tmp_rinfo = NULL; | |
2239 | ||
2240 | for (ALL_LIST_ELEMENTS_RO (list, listnode, tmp_rinfo)) | |
2241 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP && | |
2242 | tmp_rinfo->ifindex == ifc->ifp->ifindex) | |
2243 | { | |
2244 | suppress = 1; | |
2245 | break; | |
2246 | } | |
2247 | ||
2248 | if (!suppress && rinfo->type == ZEBRA_ROUTE_CONNECT && | |
c49ad8f1 | 2249 | prefix_match((struct prefix *)p, ifc->address)) |
bce8e868 LF |
2250 | suppress = 1; |
2251 | ||
2252 | if (suppress) | |
718e3744 | 2253 | continue; |
2254 | } | |
2255 | ||
2256 | /* Preparation for route-map. */ | |
2257 | rinfo->metric_set = 0; | |
2258 | rinfo->nexthop_out.s_addr = 0; | |
2259 | rinfo->metric_out = rinfo->metric; | |
16705130 | 2260 | rinfo->tag_out = rinfo->tag; |
c49ad8f1 | 2261 | rinfo->ifindex_out = ifc->ifp->ifindex; |
718e3744 | 2262 | |
16705130 | 2263 | /* In order to avoid some local loops, |
2264 | * if the RIP route has a nexthop via this interface, keep the nexthop, | |
2265 | * otherwise set it to 0. The nexthop should not be propagated | |
2266 | * beyond the local broadcast/multicast area in order | |
2267 | * to avoid an IGP multi-level recursive look-up. | |
2268 | * see (4.4) | |
2269 | */ | |
c49ad8f1 | 2270 | if (rinfo->ifindex == ifc->ifp->ifindex) |
718e3744 | 2271 | rinfo->nexthop_out = rinfo->nexthop; |
16705130 | 2272 | |
2273 | /* Interface route-map */ | |
2274 | if (ri->routemap[RIP_FILTER_OUT]) | |
2275 | { | |
2276 | ret = route_map_apply (ri->routemap[RIP_FILTER_OUT], | |
2277 | (struct prefix *) p, RMAP_RIP, | |
2278 | rinfo); | |
2279 | ||
2280 | if (ret == RMAP_DENYMATCH) | |
2281 | { | |
2282 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2283 | zlog_debug ("RIP %s/%d is filtered by route-map out", |
d904a9fc DS |
2284 | inet_ntoa (p->prefix), p->prefixlen); |
2285 | continue; | |
16705130 | 2286 | } |
2287 | } | |
718e3744 | 2288 | |
16705130 | 2289 | /* Apply redistribute route map - continue, if deny */ |
718e3744 | 2290 | if (rip->route_map[rinfo->type].name |
2291 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) | |
2292 | { | |
2293 | ret = route_map_apply (rip->route_map[rinfo->type].map, | |
2294 | (struct prefix *)p, RMAP_RIP, rinfo); | |
2295 | ||
2296 | if (ret == RMAP_DENYMATCH) | |
2297 | { | |
2298 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2299 | zlog_debug ("%s/%d is filtered by route-map", |
718e3744 | 2300 | inet_ntoa (p->prefix), p->prefixlen); |
2301 | continue; | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | /* When route-map does not set metric. */ | |
2306 | if (! rinfo->metric_set) | |
2307 | { | |
2308 | /* If redistribute metric is set. */ | |
2309 | if (rip->route_map[rinfo->type].metric_config | |
2310 | && rinfo->metric != RIP_METRIC_INFINITY) | |
2311 | { | |
2312 | rinfo->metric_out = rip->route_map[rinfo->type].metric; | |
2313 | } | |
2314 | else | |
2315 | { | |
2316 | /* If the route is not connected or localy generated | |
2317 | one, use default-metric value*/ | |
2318 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
2319 | && rinfo->type != ZEBRA_ROUTE_CONNECT | |
2320 | && rinfo->metric != RIP_METRIC_INFINITY) | |
2321 | rinfo->metric_out = rip->default_metric; | |
2322 | } | |
2323 | } | |
2324 | ||
2325 | /* Apply offset-list */ | |
2326 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
c49ad8f1 | 2327 | rip_offset_list_apply_out (p, ifc->ifp, &rinfo->metric_out); |
718e3744 | 2328 | |
2329 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2330 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
16705130 | 2331 | |
2332 | /* Perform split-horizon with poisoned reverse | |
2333 | * for RIP and connected routes. | |
2334 | **/ | |
2335 | if (ri->split_horizon == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
42d14d98 | 2336 | /* |
2337 | * We perform split horizon for RIP and connected route. | |
2338 | * For rip routes, we want to suppress the route if we would | |
2339 | * end up sending the route back on the interface that we | |
2340 | * learned it from, with a higher metric. For connected routes, | |
2341 | * we suppress the route if the prefix is a subset of the | |
2342 | * source address that we are going to use for the packet | |
2343 | * (in order to handle the case when multiple subnets are | |
2344 | * configured on the same interface). | |
2345 | */ | |
bce8e868 LF |
2346 | struct rip_info *tmp_rinfo = NULL; |
2347 | ||
2348 | for (ALL_LIST_ELEMENTS_RO (list, listnode, tmp_rinfo)) | |
2349 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP && | |
2350 | tmp_rinfo->ifindex == ifc->ifp->ifindex) | |
2351 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2352 | if (tmp_rinfo->type == ZEBRA_ROUTE_CONNECT && | |
c49ad8f1 | 2353 | prefix_match((struct prefix *)p, ifc->address)) |
bce8e868 | 2354 | rinfo->metric_out = RIP_METRIC_INFINITY; |
16705130 | 2355 | } |
b14ee00b | 2356 | |
2357 | /* Prepare preamble, auth headers, if needs be */ | |
2358 | if (num == 0) | |
2359 | { | |
2360 | stream_putc (s, RIP_RESPONSE); | |
2361 | stream_putc (s, version); | |
2362 | stream_putw (s, 0); | |
2363 | ||
0cb8a01c | 2364 | /* auth header for !v1 && !no_auth */ |
2365 | if ( (ri->auth_type != RIP_NO_AUTH) && (version != RIPv1) ) | |
b14ee00b | 2366 | doff = rip_auth_header_write (s, ri, key, auth_str, |
2367 | RIP_AUTH_SIMPLE_SIZE); | |
2368 | } | |
2369 | ||
718e3744 | 2370 | /* Write RTE to the stream. */ |
b14ee00b | 2371 | num = rip_write_rte (num, s, p, version, rinfo); |
718e3744 | 2372 | if (num == rtemax) |
2373 | { | |
2374 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
b14ee00b | 2375 | rip_auth_md5_set (s, ri, doff, auth_str, RIP_AUTH_SIMPLE_SIZE); |
718e3744 | 2376 | |
2377 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), | |
c49ad8f1 | 2378 | to, ifc); |
718e3744 | 2379 | |
2380 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2381 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), | |
2382 | stream_get_endp(s), "SEND"); | |
2383 | num = 0; | |
2384 | stream_reset (s); | |
2385 | } | |
2386 | } | |
2387 | ||
2388 | /* Flush unwritten RTE. */ | |
2389 | if (num != 0) | |
2390 | { | |
2391 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
b14ee00b | 2392 | rip_auth_md5_set (s, ri, doff, auth_str, RIP_AUTH_SIMPLE_SIZE); |
718e3744 | 2393 | |
c49ad8f1 | 2394 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), to, ifc); |
718e3744 | 2395 | |
2396 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2397 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), | |
2398 | stream_get_endp (s), "SEND"); | |
2399 | num = 0; | |
2400 | stream_reset (s); | |
2401 | } | |
2402 | ||
2403 | /* Statistics updates. */ | |
2404 | ri->sent_updates++; | |
2405 | } | |
2406 | ||
2407 | /* Send RIP packet to the interface. */ | |
dc63bfd4 | 2408 | static void |
c49ad8f1 | 2409 | rip_update_interface (struct connected *ifc, u_char version, int route_type) |
718e3744 | 2410 | { |
f90310cf RW |
2411 | struct interface *ifp = ifc->ifp; |
2412 | struct rip_interface *ri = ifp->info; | |
718e3744 | 2413 | struct sockaddr_in to; |
2414 | ||
2415 | /* When RIP version is 2 and multicast enable interface. */ | |
f90310cf | 2416 | if (version == RIPv2 && !ri->v2_broadcast && if_is_multicast (ifp)) |
718e3744 | 2417 | { |
2418 | if (IS_RIP_DEBUG_EVENT) | |
f90310cf | 2419 | zlog_debug ("multicast announce on %s ", ifp->name); |
718e3744 | 2420 | |
c49ad8f1 | 2421 | rip_output_process (ifc, NULL, route_type, version); |
718e3744 | 2422 | return; |
2423 | } | |
c49ad8f1 | 2424 | |
718e3744 | 2425 | /* If we can't send multicast packet, send it with unicast. */ |
f90310cf | 2426 | if (if_is_broadcast (ifp) || if_is_pointopoint (ifp)) |
718e3744 | 2427 | { |
c49ad8f1 | 2428 | if (ifc->address->family == AF_INET) |
2429 | { | |
2430 | /* Destination address and port setting. */ | |
2431 | memset (&to, 0, sizeof (struct sockaddr_in)); | |
2432 | if (ifc->destination) | |
e4529636 | 2433 | /* use specified broadcast or peer destination addr */ |
c49ad8f1 | 2434 | to.sin_addr = ifc->destination->u.prefix4; |
e4529636 | 2435 | else if (ifc->address->prefixlen < IPV4_MAX_PREFIXLEN) |
c49ad8f1 | 2436 | /* calculate the appropriate broadcast address */ |
2437 | to.sin_addr.s_addr = | |
2438 | ipv4_broadcast_addr(ifc->address->u.prefix4.s_addr, | |
2439 | ifc->address->prefixlen); | |
e4529636 AS |
2440 | else |
2441 | /* do not know where to send the packet */ | |
2442 | return; | |
c49ad8f1 | 2443 | to.sin_port = htons (RIP_PORT_DEFAULT); |
718e3744 | 2444 | |
c49ad8f1 | 2445 | if (IS_RIP_DEBUG_EVENT) |
e4529636 AS |
2446 | zlog_debug("%s announce to %s on %s", |
2447 | CONNECTED_PEER(ifc) ? "unicast" : "broadcast", | |
f90310cf | 2448 | inet_ntoa (to.sin_addr), ifp->name); |
718e3744 | 2449 | |
c49ad8f1 | 2450 | rip_output_process (ifc, &to, route_type, version); |
2451 | } | |
718e3744 | 2452 | } |
2453 | } | |
2454 | ||
2455 | /* Update send to all interface and neighbor. */ | |
dc63bfd4 | 2456 | static void |
718e3744 | 2457 | rip_update_process (int route_type) |
2458 | { | |
1eb8ef25 | 2459 | struct listnode *node; |
2460 | struct listnode *ifnode, *ifnnode; | |
cc1131ab | 2461 | struct connected *connected; |
718e3744 | 2462 | struct interface *ifp; |
2463 | struct rip_interface *ri; | |
2464 | struct route_node *rp; | |
2465 | struct sockaddr_in to; | |
bd40c341 | 2466 | struct prefix *p; |
718e3744 | 2467 | |
2468 | /* Send RIP update to each interface. */ | |
b2d7c082 | 2469 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
718e3744 | 2470 | { |
718e3744 | 2471 | if (if_is_loopback (ifp)) |
2472 | continue; | |
2473 | ||
2e3b2e47 | 2474 | if (! if_is_operative (ifp)) |
718e3744 | 2475 | continue; |
2476 | ||
2477 | /* Fetch RIP interface information. */ | |
2478 | ri = ifp->info; | |
2479 | ||
2480 | /* When passive interface is specified, suppress announce to the | |
2481 | interface. */ | |
2482 | if (ri->passive) | |
2483 | continue; | |
2484 | ||
2485 | if (ri->running) | |
2486 | { | |
b9d92881 AS |
2487 | /* |
2488 | * If there is no version configuration in the interface, | |
2489 | * use rip's version setting. | |
2490 | */ | |
2491 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) ? | |
2492 | rip->version_send : ri->ri_send); | |
2493 | ||
718e3744 | 2494 | if (IS_RIP_DEBUG_EVENT) |
b9d92881 | 2495 | zlog_debug("SEND UPDATE to %s ifindex %d", |
85b123a4 | 2496 | ifp->name, ifp->ifindex); |
718e3744 | 2497 | |
cc1131ab | 2498 | /* send update on each connected network */ |
1eb8ef25 | 2499 | for (ALL_LIST_ELEMENTS (ifp->connected, ifnode, ifnnode, connected)) |
cc1131ab | 2500 | { |
b9d92881 AS |
2501 | if (connected->address->family == AF_INET) |
2502 | { | |
2503 | if (vsend & RIPv1) | |
2504 | rip_update_interface (connected, RIPv1, route_type); | |
2505 | if ((vsend & RIPv2) && if_is_multicast(ifp)) | |
2506 | rip_update_interface (connected, RIPv2, route_type); | |
2507 | } | |
2508 | } | |
718e3744 | 2509 | } |
2510 | } | |
2511 | ||
2512 | /* RIP send updates to each neighbor. */ | |
2513 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) | |
2514 | if (rp->info != NULL) | |
2515 | { | |
bd40c341 | 2516 | p = &rp->p; |
718e3744 | 2517 | |
b10ce841 RW |
2518 | connected = if_lookup_address (&p->u.prefix4, AF_INET); |
2519 | if (! connected) | |
718e3744 | 2520 | { |
c49ad8f1 | 2521 | zlog_warn ("Neighbor %s doesnt have connected interface!", |
bd40c341 | 2522 | inet_ntoa (p->u.prefix4)); |
718e3744 | 2523 | continue; |
2524 | } | |
c49ad8f1 | 2525 | |
718e3744 | 2526 | /* Set destination address and port */ |
2527 | memset (&to, 0, sizeof (struct sockaddr_in)); | |
bd40c341 | 2528 | to.sin_addr = p->u.prefix4; |
718e3744 | 2529 | to.sin_port = htons (RIP_PORT_DEFAULT); |
2530 | ||
2531 | /* RIP version is rip's configuration. */ | |
c49ad8f1 | 2532 | rip_output_process (connected, &to, route_type, rip->version_send); |
718e3744 | 2533 | } |
2534 | } | |
2535 | ||
2536 | /* RIP's periodical timer. */ | |
dc63bfd4 | 2537 | static int |
718e3744 | 2538 | rip_update (struct thread *t) |
2539 | { | |
2540 | /* Clear timer pointer. */ | |
2541 | rip->t_update = NULL; | |
2542 | ||
2543 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2544 | zlog_debug ("update timer fire!"); |
718e3744 | 2545 | |
2546 | /* Process update output. */ | |
2547 | rip_update_process (rip_all_route); | |
2548 | ||
2549 | /* Triggered updates may be suppressed if a regular update is due by | |
2550 | the time the triggered update would be sent. */ | |
8578874d | 2551 | RIP_TIMER_OFF (rip->t_triggered_interval); |
718e3744 | 2552 | rip->trigger = 0; |
2553 | ||
2554 | /* Register myself. */ | |
2555 | rip_event (RIP_UPDATE_EVENT, 0); | |
2556 | ||
2557 | return 0; | |
2558 | } | |
2559 | ||
2560 | /* Walk down the RIP routing table then clear changed flag. */ | |
dc63bfd4 | 2561 | static void |
216565ab | 2562 | rip_clear_changed_flag (void) |
718e3744 | 2563 | { |
2564 | struct route_node *rp; | |
bce8e868 LF |
2565 | struct rip_info *rinfo = NULL; |
2566 | struct list *list = NULL; | |
2567 | struct listnode *listnode = NULL; | |
718e3744 | 2568 | |
2569 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
bce8e868 LF |
2570 | if ((list = rp->info) != NULL) |
2571 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
2572 | { | |
2573 | UNSET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
2574 | /* This flag can be set only on the first entry. */ | |
2575 | break; | |
2576 | } | |
718e3744 | 2577 | } |
2578 | ||
2579 | /* Triggered update interval timer. */ | |
dc63bfd4 | 2580 | static int |
718e3744 | 2581 | rip_triggered_interval (struct thread *t) |
2582 | { | |
2583 | int rip_triggered_update (struct thread *); | |
2584 | ||
2585 | rip->t_triggered_interval = NULL; | |
2586 | ||
2587 | if (rip->trigger) | |
2588 | { | |
2589 | rip->trigger = 0; | |
2590 | rip_triggered_update (t); | |
2591 | } | |
2592 | return 0; | |
2593 | } | |
2594 | ||
2595 | /* Execute triggered update. */ | |
dc63bfd4 | 2596 | static int |
718e3744 | 2597 | rip_triggered_update (struct thread *t) |
2598 | { | |
2599 | int interval; | |
2600 | ||
2601 | /* Clear thred pointer. */ | |
2602 | rip->t_triggered_update = NULL; | |
2603 | ||
2604 | /* Cancel interval timer. */ | |
8578874d | 2605 | RIP_TIMER_OFF (rip->t_triggered_interval); |
718e3744 | 2606 | rip->trigger = 0; |
2607 | ||
2608 | /* Logging triggered update. */ | |
2609 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2610 | zlog_debug ("triggered update!"); |
718e3744 | 2611 | |
2612 | /* Split Horizon processing is done when generating triggered | |
2613 | updates as well as normal updates (see section 2.6). */ | |
2614 | rip_update_process (rip_changed_route); | |
2615 | ||
2616 | /* Once all of the triggered updates have been generated, the route | |
2617 | change flags should be cleared. */ | |
2618 | rip_clear_changed_flag (); | |
2619 | ||
2620 | /* After a triggered update is sent, a timer should be set for a | |
2621 | random interval between 1 and 5 seconds. If other changes that | |
2622 | would trigger updates occur before the timer expires, a single | |
2623 | update is triggered when the timer expires. */ | |
2624 | interval = (random () % 5) + 1; | |
2625 | ||
2626 | rip->t_triggered_interval = | |
2627 | thread_add_timer (master, rip_triggered_interval, NULL, interval); | |
2628 | ||
2629 | return 0; | |
2630 | } | |
2631 | ||
2632 | /* Withdraw redistributed route. */ | |
2633 | void | |
2634 | rip_redistribute_withdraw (int type) | |
2635 | { | |
2636 | struct route_node *rp; | |
bce8e868 LF |
2637 | struct rip_info *rinfo = NULL; |
2638 | struct list *list = NULL; | |
718e3744 | 2639 | |
2640 | if (!rip) | |
2641 | return; | |
2642 | ||
2643 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
bce8e868 | 2644 | if ((list = rp->info) != NULL) |
718e3744 | 2645 | { |
bce8e868 | 2646 | rinfo = listgetdata (listhead (list)); |
718e3744 | 2647 | if (rinfo->type == type |
2648 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) | |
2649 | { | |
2650 | /* Perform poisoned reverse. */ | |
2651 | rinfo->metric = RIP_METRIC_INFINITY; | |
2652 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
2653 | rip_garbage_collect, rip->garbage_time); | |
2654 | RIP_TIMER_OFF (rinfo->t_timeout); | |
2655 | rinfo->flags |= RIP_RTF_CHANGED; | |
2656 | ||
16705130 | 2657 | if (IS_RIP_DEBUG_EVENT) { |
2658 | struct prefix_ipv4 *p = (struct prefix_ipv4 *) &rp->p; | |
2659 | ||
5d6c3779 | 2660 | zlog_debug ("Poisone %s/%d on the interface %s with an infinity metric [withdraw]", |
16705130 | 2661 | inet_ntoa(p->prefix), p->prefixlen, |
2662 | ifindex2ifname(rinfo->ifindex)); | |
2663 | } | |
2664 | ||
718e3744 | 2665 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
2666 | } | |
2667 | } | |
2668 | } | |
2669 | ||
2670 | /* Create new RIP instance and set it to global variable. */ | |
dc63bfd4 | 2671 | static int |
2672 | rip_create (void) | |
718e3744 | 2673 | { |
393deb9b | 2674 | rip = XCALLOC (MTYPE_RIP, sizeof (struct rip)); |
718e3744 | 2675 | |
2676 | /* Set initial value. */ | |
f38a471c | 2677 | rip->version_send = RI_RIP_VERSION_2; |
2678 | rip->version_recv = RI_RIP_VERSION_1_AND_2; | |
718e3744 | 2679 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; |
2680 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; | |
2681 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; | |
2682 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; | |
2683 | ||
2684 | /* Initialize RIP routig table. */ | |
2685 | rip->table = route_table_init (); | |
2686 | rip->route = route_table_init (); | |
2687 | rip->neighbor = route_table_init (); | |
2688 | ||
2689 | /* Make output stream. */ | |
2690 | rip->obuf = stream_new (1500); | |
2691 | ||
2692 | /* Make socket. */ | |
ae735d2d | 2693 | rip->sock = rip_create_socket (); |
718e3744 | 2694 | if (rip->sock < 0) |
2695 | return rip->sock; | |
2696 | ||
2697 | /* Create read and timer thread. */ | |
2698 | rip_event (RIP_READ, rip->sock); | |
2699 | rip_event (RIP_UPDATE_EVENT, 1); | |
2700 | ||
2701 | return 0; | |
2702 | } | |
2703 | ||
2704 | /* Sned RIP request to the destination. */ | |
2705 | int | |
2706 | rip_request_send (struct sockaddr_in *to, struct interface *ifp, | |
931cd54d | 2707 | u_char version, struct connected *connected) |
718e3744 | 2708 | { |
2709 | struct rte *rte; | |
2710 | struct rip_packet rip_packet; | |
1eb8ef25 | 2711 | struct listnode *node, *nnode; |
718e3744 | 2712 | |
2713 | memset (&rip_packet, 0, sizeof (rip_packet)); | |
2714 | ||
2715 | rip_packet.command = RIP_REQUEST; | |
2716 | rip_packet.version = version; | |
2717 | rte = rip_packet.rte; | |
2718 | rte->metric = htonl (RIP_METRIC_INFINITY); | |
2719 | ||
931cd54d | 2720 | if (connected) |
2721 | { | |
2722 | /* | |
2723 | * connected is only sent for ripv1 case, or when | |
2724 | * interface does not support multicast. Caller loops | |
2725 | * over each connected address for this case. | |
2726 | */ | |
11dde9c2 | 2727 | if (rip_send_packet ((u_char *) &rip_packet, sizeof (rip_packet), |
c49ad8f1 | 2728 | to, connected) != sizeof (rip_packet)) |
931cd54d | 2729 | return -1; |
2730 | else | |
2731 | return sizeof (rip_packet); | |
2732 | } | |
2733 | ||
cc1131ab | 2734 | /* send request on each connected network */ |
1eb8ef25 | 2735 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, connected)) |
cc1131ab | 2736 | { |
2737 | struct prefix_ipv4 *p; | |
2738 | ||
2739 | p = (struct prefix_ipv4 *) connected->address; | |
2740 | ||
2741 | if (p->family != AF_INET) | |
2742 | continue; | |
2743 | ||
11dde9c2 | 2744 | if (rip_send_packet ((u_char *) &rip_packet, sizeof (rip_packet), |
c49ad8f1 | 2745 | to, connected) != sizeof (rip_packet)) |
cc1131ab | 2746 | return -1; |
2747 | } | |
2748 | return sizeof (rip_packet); | |
718e3744 | 2749 | } |
6b0655a2 | 2750 | |
dc63bfd4 | 2751 | static int |
718e3744 | 2752 | rip_update_jitter (unsigned long time) |
2753 | { | |
239389ba | 2754 | #define JITTER_BOUND 4 |
2755 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. | |
2756 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2757 | The RIPv2 RFC says jitter should be small compared to | |
2758 | update_time. We consider 1/JITTER_BOUND to be small. | |
2759 | */ | |
2760 | ||
2761 | int jitter_input = time; | |
2762 | int jitter; | |
2763 | ||
2764 | if (jitter_input < JITTER_BOUND) | |
2765 | jitter_input = JITTER_BOUND; | |
2766 | ||
b06fd125 | 2767 | jitter = (((random () % ((jitter_input * 2) + 1)) - jitter_input)); |
239389ba | 2768 | |
2769 | return jitter/JITTER_BOUND; | |
718e3744 | 2770 | } |
2771 | ||
2772 | void | |
2773 | rip_event (enum rip_event event, int sock) | |
2774 | { | |
2775 | int jitter = 0; | |
2776 | ||
2777 | switch (event) | |
2778 | { | |
2779 | case RIP_READ: | |
2780 | rip->t_read = thread_add_read (master, rip_read, NULL, sock); | |
2781 | break; | |
2782 | case RIP_UPDATE_EVENT: | |
8578874d | 2783 | RIP_TIMER_OFF (rip->t_update); |
718e3744 | 2784 | jitter = rip_update_jitter (rip->update_time); |
2785 | rip->t_update = | |
2786 | thread_add_timer (master, rip_update, NULL, | |
2787 | sock ? 2 : rip->update_time + jitter); | |
2788 | break; | |
2789 | case RIP_TRIGGERED_UPDATE: | |
2790 | if (rip->t_triggered_interval) | |
2791 | rip->trigger = 1; | |
2792 | else if (! rip->t_triggered_update) | |
2793 | rip->t_triggered_update = | |
2794 | thread_add_event (master, rip_triggered_update, NULL, 0); | |
2795 | break; | |
2796 | default: | |
2797 | break; | |
2798 | } | |
2799 | } | |
6b0655a2 | 2800 | |
718e3744 | 2801 | DEFUN (router_rip, |
2802 | router_rip_cmd, | |
2803 | "router rip", | |
2804 | "Enable a routing process\n" | |
2805 | "Routing Information Protocol (RIP)\n") | |
2806 | { | |
2807 | int ret; | |
2808 | ||
2809 | /* If rip is not enabled before. */ | |
2810 | if (! rip) | |
2811 | { | |
2812 | ret = rip_create (); | |
2813 | if (ret < 0) | |
2814 | { | |
2815 | zlog_info ("Can't create RIP"); | |
2816 | return CMD_WARNING; | |
2817 | } | |
2818 | } | |
2819 | vty->node = RIP_NODE; | |
2820 | vty->index = rip; | |
2821 | ||
2822 | return CMD_SUCCESS; | |
2823 | } | |
2824 | ||
2825 | DEFUN (no_router_rip, | |
2826 | no_router_rip_cmd, | |
2827 | "no router rip", | |
2828 | NO_STR | |
2829 | "Enable a routing process\n" | |
2830 | "Routing Information Protocol (RIP)\n") | |
2831 | { | |
2832 | if (rip) | |
2833 | rip_clean (); | |
2834 | return CMD_SUCCESS; | |
2835 | } | |
2836 | ||
2837 | DEFUN (rip_version, | |
2838 | rip_version_cmd, | |
2839 | "version <1-2>", | |
2840 | "Set routing protocol version\n" | |
2841 | "version\n") | |
2842 | { | |
2843 | int version; | |
2844 | ||
2845 | version = atoi (argv[0]); | |
2846 | if (version != RIPv1 && version != RIPv2) | |
2847 | { | |
2848 | vty_out (vty, "invalid rip version %d%s", version, | |
2849 | VTY_NEWLINE); | |
2850 | return CMD_WARNING; | |
2851 | } | |
f38a471c | 2852 | rip->version_send = version; |
2853 | rip->version_recv = version; | |
718e3744 | 2854 | |
2855 | return CMD_SUCCESS; | |
2856 | } | |
2857 | ||
2858 | DEFUN (no_rip_version, | |
2859 | no_rip_version_cmd, | |
2860 | "no version", | |
2861 | NO_STR | |
2862 | "Set routing protocol version\n") | |
2863 | { | |
2864 | /* Set RIP version to the default. */ | |
f38a471c | 2865 | rip->version_send = RI_RIP_VERSION_2; |
2866 | rip->version_recv = RI_RIP_VERSION_1_AND_2; | |
718e3744 | 2867 | |
2868 | return CMD_SUCCESS; | |
2869 | } | |
2870 | ||
2871 | ALIAS (no_rip_version, | |
2872 | no_rip_version_val_cmd, | |
2873 | "no version <1-2>", | |
2874 | NO_STR | |
2875 | "Set routing protocol version\n" | |
2876 | "version\n") | |
2877 | ||
2878 | DEFUN (rip_route, | |
2879 | rip_route_cmd, | |
2880 | "route A.B.C.D/M", | |
2881 | "RIP static route configuration\n" | |
2882 | "IP prefix <network>/<length>\n") | |
2883 | { | |
2884 | int ret; | |
2885 | struct prefix_ipv4 p; | |
2886 | struct route_node *node; | |
2887 | ||
2888 | ret = str2prefix_ipv4 (argv[0], &p); | |
2889 | if (ret < 0) | |
2890 | { | |
2891 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); | |
2892 | return CMD_WARNING; | |
2893 | } | |
2894 | apply_mask_ipv4 (&p); | |
2895 | ||
2896 | /* For router rip configuration. */ | |
2897 | node = route_node_get (rip->route, (struct prefix *) &p); | |
2898 | ||
2899 | if (node->info) | |
2900 | { | |
2901 | vty_out (vty, "There is already same static route.%s", VTY_NEWLINE); | |
2902 | route_unlock_node (node); | |
2903 | return CMD_WARNING; | |
2904 | } | |
2905 | ||
e5f745ca | 2906 | node->info = (void *)1; |
718e3744 | 2907 | |
9471675f | 2908 | rip_redistribute_add (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0, NULL, 0, 0, 0); |
718e3744 | 2909 | |
2910 | return CMD_SUCCESS; | |
2911 | } | |
2912 | ||
2913 | DEFUN (no_rip_route, | |
2914 | no_rip_route_cmd, | |
2915 | "no route A.B.C.D/M", | |
2916 | NO_STR | |
2917 | "RIP static route configuration\n" | |
2918 | "IP prefix <network>/<length>\n") | |
2919 | { | |
2920 | int ret; | |
2921 | struct prefix_ipv4 p; | |
2922 | struct route_node *node; | |
2923 | ||
2924 | ret = str2prefix_ipv4 (argv[0], &p); | |
2925 | if (ret < 0) | |
2926 | { | |
2927 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); | |
2928 | return CMD_WARNING; | |
2929 | } | |
2930 | apply_mask_ipv4 (&p); | |
2931 | ||
2932 | /* For router rip configuration. */ | |
2933 | node = route_node_lookup (rip->route, (struct prefix *) &p); | |
2934 | if (! node) | |
2935 | { | |
2936 | vty_out (vty, "Can't find route %s.%s", argv[0], | |
2937 | VTY_NEWLINE); | |
2938 | return CMD_WARNING; | |
2939 | } | |
2940 | ||
2941 | rip_redistribute_delete (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0); | |
2942 | route_unlock_node (node); | |
2943 | ||
2944 | node->info = NULL; | |
2945 | route_unlock_node (node); | |
2946 | ||
2947 | return CMD_SUCCESS; | |
2948 | } | |
2949 | ||
2c239705 | 2950 | #if 0 |
dc63bfd4 | 2951 | static void |
216565ab | 2952 | rip_update_default_metric (void) |
718e3744 | 2953 | { |
2954 | struct route_node *np; | |
bce8e868 LF |
2955 | struct rip_info *rinfo = NULL; |
2956 | struct list *list = NULL; | |
2957 | struct listnode *listnode = NULL; | |
718e3744 | 2958 | |
2959 | for (np = route_top (rip->table); np; np = route_next (np)) | |
bce8e868 LF |
2960 | if ((list = np->info) != NULL) |
2961 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
2962 | if (rinfo->type != ZEBRA_ROUTE_RIP && rinfo->type != ZEBRA_ROUTE_CONNECT) | |
2963 | rinfo->metric = rip->default_metric; | |
718e3744 | 2964 | } |
2c239705 | 2965 | #endif |
718e3744 | 2966 | |
2967 | DEFUN (rip_default_metric, | |
2968 | rip_default_metric_cmd, | |
2969 | "default-metric <1-16>", | |
2970 | "Set a metric of redistribute routes\n" | |
2971 | "Default metric\n") | |
2972 | { | |
2973 | if (rip) | |
2974 | { | |
2975 | rip->default_metric = atoi (argv[0]); | |
2976 | /* rip_update_default_metric (); */ | |
2977 | } | |
2978 | return CMD_SUCCESS; | |
2979 | } | |
2980 | ||
2981 | DEFUN (no_rip_default_metric, | |
2982 | no_rip_default_metric_cmd, | |
2983 | "no default-metric", | |
2984 | NO_STR | |
2985 | "Set a metric of redistribute routes\n" | |
2986 | "Default metric\n") | |
2987 | { | |
2988 | if (rip) | |
2989 | { | |
2990 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; | |
2991 | /* rip_update_default_metric (); */ | |
2992 | } | |
2993 | return CMD_SUCCESS; | |
2994 | } | |
2995 | ||
2996 | ALIAS (no_rip_default_metric, | |
2997 | no_rip_default_metric_val_cmd, | |
2998 | "no default-metric <1-16>", | |
2999 | NO_STR | |
3000 | "Set a metric of redistribute routes\n" | |
3001 | "Default metric\n") | |
3002 | ||
3003 | DEFUN (rip_timers, | |
3004 | rip_timers_cmd, | |
3005 | "timers basic <5-2147483647> <5-2147483647> <5-2147483647>", | |
3006 | "Adjust routing timers\n" | |
3007 | "Basic routing protocol update timers\n" | |
3008 | "Routing table update timer value in second. Default is 30.\n" | |
3009 | "Routing information timeout timer. Default is 180.\n" | |
3010 | "Garbage collection timer. Default is 120.\n") | |
3011 | { | |
3012 | unsigned long update; | |
3013 | unsigned long timeout; | |
3014 | unsigned long garbage; | |
3015 | char *endptr = NULL; | |
3016 | unsigned long RIP_TIMER_MAX = 2147483647; | |
3017 | unsigned long RIP_TIMER_MIN = 5; | |
3018 | ||
3019 | update = strtoul (argv[0], &endptr, 10); | |
3020 | if (update > RIP_TIMER_MAX || update < RIP_TIMER_MIN || *endptr != '\0') | |
3021 | { | |
3022 | vty_out (vty, "update timer value error%s", VTY_NEWLINE); | |
3023 | return CMD_WARNING; | |
3024 | } | |
3025 | ||
3026 | timeout = strtoul (argv[1], &endptr, 10); | |
3027 | if (timeout > RIP_TIMER_MAX || timeout < RIP_TIMER_MIN || *endptr != '\0') | |
3028 | { | |
3029 | vty_out (vty, "timeout timer value error%s", VTY_NEWLINE); | |
3030 | return CMD_WARNING; | |
3031 | } | |
3032 | ||
3033 | garbage = strtoul (argv[2], &endptr, 10); | |
3034 | if (garbage > RIP_TIMER_MAX || garbage < RIP_TIMER_MIN || *endptr != '\0') | |
3035 | { | |
3036 | vty_out (vty, "garbage timer value error%s", VTY_NEWLINE); | |
3037 | return CMD_WARNING; | |
3038 | } | |
3039 | ||
3040 | /* Set each timer value. */ | |
3041 | rip->update_time = update; | |
3042 | rip->timeout_time = timeout; | |
3043 | rip->garbage_time = garbage; | |
3044 | ||
3045 | /* Reset update timer thread. */ | |
3046 | rip_event (RIP_UPDATE_EVENT, 0); | |
3047 | ||
3048 | return CMD_SUCCESS; | |
3049 | } | |
3050 | ||
3051 | DEFUN (no_rip_timers, | |
3052 | no_rip_timers_cmd, | |
3053 | "no timers basic", | |
3054 | NO_STR | |
3055 | "Adjust routing timers\n" | |
3056 | "Basic routing protocol update timers\n") | |
3057 | { | |
3058 | /* Set each timer value to the default. */ | |
3059 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; | |
3060 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; | |
3061 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; | |
3062 | ||
3063 | /* Reset update timer thread. */ | |
3064 | rip_event (RIP_UPDATE_EVENT, 0); | |
3065 | ||
3066 | return CMD_SUCCESS; | |
3067 | } | |
16705130 | 3068 | |
3069 | ALIAS (no_rip_timers, | |
3070 | no_rip_timers_val_cmd, | |
3071 | "no timers basic <0-65535> <0-65535> <0-65535>", | |
3072 | NO_STR | |
3073 | "Adjust routing timers\n" | |
3074 | "Basic routing protocol update timers\n" | |
3075 | "Routing table update timer value in second. Default is 30.\n" | |
3076 | "Routing information timeout timer. Default is 180.\n" | |
3077 | "Garbage collection timer. Default is 120.\n") | |
3078 | ||
6b0655a2 | 3079 | |
718e3744 | 3080 | struct route_table *rip_distance_table; |
3081 | ||
3082 | struct rip_distance | |
3083 | { | |
3084 | /* Distance value for the IP source prefix. */ | |
3085 | u_char distance; | |
3086 | ||
3087 | /* Name of the access-list to be matched. */ | |
3088 | char *access_list; | |
3089 | }; | |
3090 | ||
dc63bfd4 | 3091 | static struct rip_distance * |
216565ab | 3092 | rip_distance_new (void) |
718e3744 | 3093 | { |
393deb9b | 3094 | return XCALLOC (MTYPE_RIP_DISTANCE, sizeof (struct rip_distance)); |
718e3744 | 3095 | } |
3096 | ||
dc63bfd4 | 3097 | static void |
718e3744 | 3098 | rip_distance_free (struct rip_distance *rdistance) |
3099 | { | |
3100 | XFREE (MTYPE_RIP_DISTANCE, rdistance); | |
3101 | } | |
3102 | ||
dc63bfd4 | 3103 | static int |
98b718a9 | 3104 | rip_distance_set (struct vty *vty, const char *distance_str, const char *ip_str, |
3105 | const char *access_list_str) | |
718e3744 | 3106 | { |
3107 | int ret; | |
3108 | struct prefix_ipv4 p; | |
3109 | u_char distance; | |
3110 | struct route_node *rn; | |
3111 | struct rip_distance *rdistance; | |
3112 | ||
3113 | ret = str2prefix_ipv4 (ip_str, &p); | |
3114 | if (ret == 0) | |
3115 | { | |
3116 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); | |
3117 | return CMD_WARNING; | |
3118 | } | |
3119 | ||
3120 | distance = atoi (distance_str); | |
3121 | ||
3122 | /* Get RIP distance node. */ | |
3123 | rn = route_node_get (rip_distance_table, (struct prefix *) &p); | |
3124 | if (rn->info) | |
3125 | { | |
3126 | rdistance = rn->info; | |
3127 | route_unlock_node (rn); | |
3128 | } | |
3129 | else | |
3130 | { | |
3131 | rdistance = rip_distance_new (); | |
3132 | rn->info = rdistance; | |
3133 | } | |
3134 | ||
3135 | /* Set distance value. */ | |
3136 | rdistance->distance = distance; | |
3137 | ||
3138 | /* Reset access-list configuration. */ | |
3139 | if (rdistance->access_list) | |
3140 | { | |
3141 | free (rdistance->access_list); | |
3142 | rdistance->access_list = NULL; | |
3143 | } | |
3144 | if (access_list_str) | |
3145 | rdistance->access_list = strdup (access_list_str); | |
3146 | ||
3147 | return CMD_SUCCESS; | |
3148 | } | |
3149 | ||
dc63bfd4 | 3150 | static int |
98b718a9 | 3151 | rip_distance_unset (struct vty *vty, const char *distance_str, |
3152 | const char *ip_str, const char *access_list_str) | |
718e3744 | 3153 | { |
3154 | int ret; | |
3155 | struct prefix_ipv4 p; | |
718e3744 | 3156 | struct route_node *rn; |
3157 | struct rip_distance *rdistance; | |
3158 | ||
3159 | ret = str2prefix_ipv4 (ip_str, &p); | |
3160 | if (ret == 0) | |
3161 | { | |
3162 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); | |
3163 | return CMD_WARNING; | |
3164 | } | |
3165 | ||
718e3744 | 3166 | rn = route_node_lookup (rip_distance_table, (struct prefix *)&p); |
3167 | if (! rn) | |
3168 | { | |
3169 | vty_out (vty, "Can't find specified prefix%s", VTY_NEWLINE); | |
3170 | return CMD_WARNING; | |
3171 | } | |
3172 | ||
3173 | rdistance = rn->info; | |
3174 | ||
3175 | if (rdistance->access_list) | |
3176 | free (rdistance->access_list); | |
3177 | rip_distance_free (rdistance); | |
3178 | ||
3179 | rn->info = NULL; | |
3180 | route_unlock_node (rn); | |
3181 | route_unlock_node (rn); | |
3182 | ||
3183 | return CMD_SUCCESS; | |
3184 | } | |
3185 | ||
dc63bfd4 | 3186 | static void |
216565ab | 3187 | rip_distance_reset (void) |
718e3744 | 3188 | { |
3189 | struct route_node *rn; | |
3190 | struct rip_distance *rdistance; | |
3191 | ||
3192 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3193 | if ((rdistance = rn->info) != NULL) | |
3194 | { | |
3195 | if (rdistance->access_list) | |
3196 | free (rdistance->access_list); | |
3197 | rip_distance_free (rdistance); | |
3198 | rn->info = NULL; | |
3199 | route_unlock_node (rn); | |
3200 | } | |
3201 | } | |
3202 | ||
3203 | /* Apply RIP information to distance method. */ | |
3204 | u_char | |
3205 | rip_distance_apply (struct rip_info *rinfo) | |
3206 | { | |
3207 | struct route_node *rn; | |
3208 | struct prefix_ipv4 p; | |
3209 | struct rip_distance *rdistance; | |
3210 | struct access_list *alist; | |
3211 | ||
3212 | if (! rip) | |
3213 | return 0; | |
3214 | ||
3215 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
3216 | p.family = AF_INET; | |
3217 | p.prefix = rinfo->from; | |
3218 | p.prefixlen = IPV4_MAX_BITLEN; | |
3219 | ||
3220 | /* Check source address. */ | |
3221 | rn = route_node_match (rip_distance_table, (struct prefix *) &p); | |
3222 | if (rn) | |
3223 | { | |
3224 | rdistance = rn->info; | |
3225 | route_unlock_node (rn); | |
3226 | ||
3227 | if (rdistance->access_list) | |
3228 | { | |
3229 | alist = access_list_lookup (AFI_IP, rdistance->access_list); | |
3230 | if (alist == NULL) | |
3231 | return 0; | |
3232 | if (access_list_apply (alist, &rinfo->rp->p) == FILTER_DENY) | |
3233 | return 0; | |
3234 | ||
3235 | return rdistance->distance; | |
3236 | } | |
3237 | else | |
3238 | return rdistance->distance; | |
3239 | } | |
3240 | ||
3241 | if (rip->distance) | |
3242 | return rip->distance; | |
3243 | ||
3244 | return 0; | |
3245 | } | |
3246 | ||
dc63bfd4 | 3247 | static void |
718e3744 | 3248 | rip_distance_show (struct vty *vty) |
3249 | { | |
3250 | struct route_node *rn; | |
3251 | struct rip_distance *rdistance; | |
3252 | int header = 1; | |
3253 | char buf[BUFSIZ]; | |
3254 | ||
3255 | vty_out (vty, " Distance: (default is %d)%s", | |
3256 | rip->distance ? rip->distance :ZEBRA_RIP_DISTANCE_DEFAULT, | |
3257 | VTY_NEWLINE); | |
3258 | ||
3259 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3260 | if ((rdistance = rn->info) != NULL) | |
3261 | { | |
3262 | if (header) | |
3263 | { | |
3264 | vty_out (vty, " Address Distance List%s", | |
3265 | VTY_NEWLINE); | |
3266 | header = 0; | |
3267 | } | |
3268 | sprintf (buf, "%s/%d", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen); | |
3269 | vty_out (vty, " %-20s %4d %s%s", | |
3270 | buf, rdistance->distance, | |
3271 | rdistance->access_list ? rdistance->access_list : "", | |
3272 | VTY_NEWLINE); | |
3273 | } | |
3274 | } | |
3275 | ||
3276 | DEFUN (rip_distance, | |
3277 | rip_distance_cmd, | |
3278 | "distance <1-255>", | |
3279 | "Administrative distance\n" | |
3280 | "Distance value\n") | |
3281 | { | |
3282 | rip->distance = atoi (argv[0]); | |
3283 | return CMD_SUCCESS; | |
3284 | } | |
3285 | ||
3286 | DEFUN (no_rip_distance, | |
3287 | no_rip_distance_cmd, | |
3288 | "no distance <1-255>", | |
3289 | NO_STR | |
3290 | "Administrative distance\n" | |
3291 | "Distance value\n") | |
3292 | { | |
3293 | rip->distance = 0; | |
3294 | return CMD_SUCCESS; | |
3295 | } | |
3296 | ||
3297 | DEFUN (rip_distance_source, | |
3298 | rip_distance_source_cmd, | |
3299 | "distance <1-255> A.B.C.D/M", | |
3300 | "Administrative distance\n" | |
3301 | "Distance value\n" | |
3302 | "IP source prefix\n") | |
3303 | { | |
3304 | rip_distance_set (vty, argv[0], argv[1], NULL); | |
3305 | return CMD_SUCCESS; | |
3306 | } | |
3307 | ||
3308 | DEFUN (no_rip_distance_source, | |
3309 | no_rip_distance_source_cmd, | |
3310 | "no distance <1-255> A.B.C.D/M", | |
3311 | NO_STR | |
3312 | "Administrative distance\n" | |
3313 | "Distance value\n" | |
3314 | "IP source prefix\n") | |
3315 | { | |
3316 | rip_distance_unset (vty, argv[0], argv[1], NULL); | |
3317 | return CMD_SUCCESS; | |
3318 | } | |
3319 | ||
3320 | DEFUN (rip_distance_source_access_list, | |
3321 | rip_distance_source_access_list_cmd, | |
3322 | "distance <1-255> A.B.C.D/M WORD", | |
3323 | "Administrative distance\n" | |
3324 | "Distance value\n" | |
3325 | "IP source prefix\n" | |
3326 | "Access list name\n") | |
3327 | { | |
3328 | rip_distance_set (vty, argv[0], argv[1], argv[2]); | |
3329 | return CMD_SUCCESS; | |
3330 | } | |
3331 | ||
3332 | DEFUN (no_rip_distance_source_access_list, | |
3333 | no_rip_distance_source_access_list_cmd, | |
3334 | "no distance <1-255> A.B.C.D/M WORD", | |
3335 | NO_STR | |
3336 | "Administrative distance\n" | |
3337 | "Distance value\n" | |
3338 | "IP source prefix\n" | |
3339 | "Access list name\n") | |
3340 | { | |
3341 | rip_distance_unset (vty, argv[0], argv[1], argv[2]); | |
3342 | return CMD_SUCCESS; | |
3343 | } | |
6b0655a2 | 3344 | |
8478ae7e LF |
3345 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
3346 | static void | |
3347 | rip_ecmp_disable (void) | |
3348 | { | |
3349 | struct route_node *rp; | |
3350 | struct rip_info *rinfo, *tmp_rinfo; | |
3351 | struct list *list; | |
3352 | struct listnode *node, *nextnode; | |
3353 | ||
3354 | if (!rip) | |
3355 | return; | |
3356 | ||
3357 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
3358 | if ((list = rp->info) != NULL && listcount (list) > 1) | |
3359 | { | |
3360 | rinfo = listgetdata (listhead (list)); | |
3361 | if (!rip_route_rte (rinfo)) | |
3362 | continue; | |
3363 | ||
3364 | /* Drop all other entries, except the first one. */ | |
3365 | for (ALL_LIST_ELEMENTS (list, node, nextnode, tmp_rinfo)) | |
3366 | if (tmp_rinfo != rinfo) | |
3367 | { | |
3368 | RIP_TIMER_OFF (tmp_rinfo->t_timeout); | |
3369 | RIP_TIMER_OFF (tmp_rinfo->t_garbage_collect); | |
3370 | list_delete_node (list, node); | |
3371 | rip_info_free (tmp_rinfo); | |
3372 | } | |
3373 | ||
3374 | /* Update zebra. */ | |
3375 | rip_zebra_ipv4_add (rp); | |
3376 | ||
3377 | /* Set the route change flag. */ | |
3378 | SET_FLAG (rinfo->flags, RIP_RTF_CHANGED); | |
3379 | ||
3380 | /* Signal the output process to trigger an update. */ | |
3381 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
3382 | } | |
3383 | } | |
3384 | ||
3385 | DEFUN (rip_allow_ecmp, | |
3386 | rip_allow_ecmp_cmd, | |
3387 | "allow-ecmp", | |
3388 | "Allow Equal Cost MultiPath\n") | |
3389 | { | |
3390 | if (rip->ecmp) | |
3391 | { | |
3392 | vty_out (vty, "ECMP is already enabled.%s", VTY_NEWLINE); | |
3393 | return CMD_WARNING; | |
3394 | } | |
3395 | ||
3396 | rip->ecmp = 1; | |
3397 | zlog_info ("ECMP is enabled."); | |
3398 | return CMD_SUCCESS; | |
3399 | } | |
3400 | ||
3401 | DEFUN (no_rip_allow_ecmp, | |
3402 | no_rip_allow_ecmp_cmd, | |
3403 | "no allow-ecmp", | |
3404 | NO_STR | |
3405 | "Allow Equal Cost MultiPath\n") | |
3406 | { | |
3407 | if (!rip->ecmp) | |
3408 | { | |
3409 | vty_out (vty, "ECMP is already disabled.%s", VTY_NEWLINE); | |
3410 | return CMD_WARNING; | |
3411 | } | |
3412 | ||
3413 | rip->ecmp = 0; | |
3414 | zlog_info ("ECMP is disabled."); | |
3415 | rip_ecmp_disable (); | |
3416 | return CMD_SUCCESS; | |
3417 | } | |
3418 | ||
718e3744 | 3419 | /* Print out routes update time. */ |
dc63bfd4 | 3420 | static void |
718e3744 | 3421 | rip_vty_out_uptime (struct vty *vty, struct rip_info *rinfo) |
3422 | { | |
718e3744 | 3423 | time_t clock; |
3424 | struct tm *tm; | |
3425 | #define TIME_BUF 25 | |
3426 | char timebuf [TIME_BUF]; | |
3427 | struct thread *thread; | |
3428 | ||
718e3744 | 3429 | if ((thread = rinfo->t_timeout) != NULL) |
3430 | { | |
a1fdf947 | 3431 | clock = thread_timer_remain_second (thread); |
718e3744 | 3432 | tm = gmtime (&clock); |
3433 | strftime (timebuf, TIME_BUF, "%M:%S", tm); | |
3434 | vty_out (vty, "%5s", timebuf); | |
3435 | } | |
3436 | else if ((thread = rinfo->t_garbage_collect) != NULL) | |
3437 | { | |
a1fdf947 | 3438 | clock = thread_timer_remain_second (thread); |
718e3744 | 3439 | tm = gmtime (&clock); |
3440 | strftime (timebuf, TIME_BUF, "%M:%S", tm); | |
3441 | vty_out (vty, "%5s", timebuf); | |
3442 | } | |
3443 | } | |
3444 | ||
dc63bfd4 | 3445 | static const char * |
718e3744 | 3446 | rip_route_type_print (int sub_type) |
3447 | { | |
3448 | switch (sub_type) | |
3449 | { | |
3450 | case RIP_ROUTE_RTE: | |
3451 | return "n"; | |
3452 | case RIP_ROUTE_STATIC: | |
3453 | return "s"; | |
3454 | case RIP_ROUTE_DEFAULT: | |
3455 | return "d"; | |
3456 | case RIP_ROUTE_REDISTRIBUTE: | |
3457 | return "r"; | |
3458 | case RIP_ROUTE_INTERFACE: | |
3459 | return "i"; | |
3460 | default: | |
3461 | return "?"; | |
3462 | } | |
3463 | } | |
3464 | ||
3465 | DEFUN (show_ip_rip, | |
3466 | show_ip_rip_cmd, | |
3467 | "show ip rip", | |
3468 | SHOW_STR | |
3469 | IP_STR | |
3470 | "Show RIP routes\n") | |
3471 | { | |
3472 | struct route_node *np; | |
bce8e868 LF |
3473 | struct rip_info *rinfo = NULL; |
3474 | struct list *list = NULL; | |
3475 | struct listnode *listnode = NULL; | |
718e3744 | 3476 | |
3477 | if (! rip) | |
3478 | return CMD_SUCCESS; | |
3479 | ||
16705130 | 3480 | vty_out (vty, "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP%s" |
3481 | "Sub-codes:%s" | |
3482 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,%s" | |
718e3744 | 3483 | " (i) - interface%s%s" |
a1455d86 | 3484 | " Network Next Hop Metric From Tag Time%s", |
16705130 | 3485 | VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE); |
718e3744 | 3486 | |
3487 | for (np = route_top (rip->table); np; np = route_next (np)) | |
bce8e868 LF |
3488 | if ((list = np->info) != NULL) |
3489 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
718e3744 | 3490 | { |
3491 | int len; | |
3492 | ||
f52d13cb | 3493 | len = vty_out (vty, "%c(%s) %s/%d", |
718e3744 | 3494 | /* np->lock, For debugging. */ |
f52d13cb | 3495 | zebra_route_char(rinfo->type), |
718e3744 | 3496 | rip_route_type_print (rinfo->sub_type), |
3497 | inet_ntoa (np->p.u.prefix4), np->p.prefixlen); | |
3498 | ||
a1455d86 | 3499 | len = 24 - len; |
718e3744 | 3500 | |
3501 | if (len > 0) | |
3502 | vty_out (vty, "%*s", len, " "); | |
3503 | ||
3504 | if (rinfo->nexthop.s_addr) | |
3505 | vty_out (vty, "%-20s %2d ", inet_ntoa (rinfo->nexthop), | |
3506 | rinfo->metric); | |
3507 | else | |
3508 | vty_out (vty, "0.0.0.0 %2d ", rinfo->metric); | |
3509 | ||
3510 | /* Route which exist in kernel routing table. */ | |
3511 | if ((rinfo->type == ZEBRA_ROUTE_RIP) && | |
3512 | (rinfo->sub_type == RIP_ROUTE_RTE)) | |
3513 | { | |
3514 | vty_out (vty, "%-15s ", inet_ntoa (rinfo->from)); | |
dc9ffce8 | 3515 | vty_out (vty, "%3"ROUTE_TAG_PRI" ", (route_tag_t)rinfo->tag); |
718e3744 | 3516 | rip_vty_out_uptime (vty, rinfo); |
3517 | } | |
3518 | else if (rinfo->metric == RIP_METRIC_INFINITY) | |
3519 | { | |
3520 | vty_out (vty, "self "); | |
dc9ffce8 | 3521 | vty_out (vty, "%3"ROUTE_TAG_PRI" ", (route_tag_t)rinfo->tag); |
718e3744 | 3522 | rip_vty_out_uptime (vty, rinfo); |
3523 | } | |
3524 | else | |
16705130 | 3525 | { |
fbf5d033 | 3526 | if (rinfo->external_metric) |
3527 | { | |
3528 | len = vty_out (vty, "self (%s:%d)", | |
f52d13cb | 3529 | zebra_route_string(rinfo->type), |
fbf5d033 | 3530 | rinfo->external_metric); |
3531 | len = 16 - len; | |
3532 | if (len > 0) | |
3533 | vty_out (vty, "%*s", len, " "); | |
3534 | } | |
3535 | else | |
3536 | vty_out (vty, "self "); | |
dc9ffce8 | 3537 | vty_out (vty, "%3"ROUTE_TAG_PRI, (route_tag_t)rinfo->tag); |
16705130 | 3538 | } |
718e3744 | 3539 | |
3540 | vty_out (vty, "%s", VTY_NEWLINE); | |
3541 | } | |
3542 | return CMD_SUCCESS; | |
3543 | } | |
3544 | ||
16705130 | 3545 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3546 | DEFUN (show_ip_rip_status, | |
3547 | show_ip_rip_status_cmd, | |
3548 | "show ip rip status", | |
718e3744 | 3549 | SHOW_STR |
3550 | IP_STR | |
16705130 | 3551 | "Show RIP routes\n" |
718e3744 | 3552 | "IP routing protocol process parameters and statistics\n") |
3553 | { | |
52dc7ee6 | 3554 | struct listnode *node; |
718e3744 | 3555 | struct interface *ifp; |
3556 | struct rip_interface *ri; | |
1423c809 | 3557 | extern const struct message ri_version_msg[]; |
8a676be3 | 3558 | const char *send_version; |
3559 | const char *receive_version; | |
718e3744 | 3560 | |
3561 | if (! rip) | |
3562 | return CMD_SUCCESS; | |
3563 | ||
3564 | vty_out (vty, "Routing Protocol is \"rip\"%s", VTY_NEWLINE); | |
3565 | vty_out (vty, " Sending updates every %ld seconds with +/-50%%,", | |
3566 | rip->update_time); | |
a4c64828 AS |
3567 | vty_out (vty, " next due in %lu seconds%s", |
3568 | thread_timer_remain_second(rip->t_update), | |
718e3744 | 3569 | VTY_NEWLINE); |
3570 | vty_out (vty, " Timeout after %ld seconds,", rip->timeout_time); | |
3571 | vty_out (vty, " garbage collect after %ld seconds%s", rip->garbage_time, | |
3572 | VTY_NEWLINE); | |
3573 | ||
3574 | /* Filtering status show. */ | |
3575 | config_show_distribute (vty); | |
3576 | ||
3577 | /* Default metric information. */ | |
3578 | vty_out (vty, " Default redistribution metric is %d%s", | |
3579 | rip->default_metric, VTY_NEWLINE); | |
3580 | ||
3581 | /* Redistribute information. */ | |
3582 | vty_out (vty, " Redistributing:"); | |
3583 | config_write_rip_redistribute (vty, 0); | |
3584 | vty_out (vty, "%s", VTY_NEWLINE); | |
3585 | ||
f38a471c | 3586 | vty_out (vty, " Default version control: send version %s,", |
3587 | lookup(ri_version_msg,rip->version_send)); | |
3588 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3589 | vty_out (vty, " receive any version %s", VTY_NEWLINE); | |
3590 | else | |
3591 | vty_out (vty, " receive version %s %s", | |
3592 | lookup(ri_version_msg,rip->version_recv), VTY_NEWLINE); | |
718e3744 | 3593 | |
3594 | vty_out (vty, " Interface Send Recv Key-chain%s", VTY_NEWLINE); | |
3595 | ||
b2d7c082 | 3596 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
718e3744 | 3597 | { |
718e3744 | 3598 | ri = ifp->info; |
3599 | ||
82f5ee1e SH |
3600 | if (!ri->running) |
3601 | continue; | |
3602 | ||
718e3744 | 3603 | if (ri->enable_network || ri->enable_interface) |
3604 | { | |
3605 | if (ri->ri_send == RI_RIP_UNSPEC) | |
f38a471c | 3606 | send_version = lookup (ri_version_msg, rip->version_send); |
718e3744 | 3607 | else |
3608 | send_version = lookup (ri_version_msg, ri->ri_send); | |
3609 | ||
3610 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
f38a471c | 3611 | receive_version = lookup (ri_version_msg, rip->version_recv); |
718e3744 | 3612 | else |
3613 | receive_version = lookup (ri_version_msg, ri->ri_receive); | |
3614 | ||
3615 | vty_out (vty, " %-17s%-3s %-3s %s%s", ifp->name, | |
3616 | send_version, | |
3617 | receive_version, | |
3618 | ri->key_chain ? ri->key_chain : "", | |
3619 | VTY_NEWLINE); | |
3620 | } | |
3621 | } | |
3622 | ||
3623 | vty_out (vty, " Routing for Networks:%s", VTY_NEWLINE); | |
3624 | config_write_rip_network (vty, 0); | |
3625 | ||
4aaff3f8 | 3626 | { |
3627 | int found_passive = 0; | |
b2d7c082 | 3628 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
4aaff3f8 | 3629 | { |
4aaff3f8 | 3630 | ri = ifp->info; |
3631 | ||
3632 | if ((ri->enable_network || ri->enable_interface) && ri->passive) | |
3633 | { | |
3634 | if (!found_passive) | |
3635 | { | |
3636 | vty_out (vty, " Passive Interface(s):%s", VTY_NEWLINE); | |
3637 | found_passive = 1; | |
3638 | } | |
3639 | vty_out (vty, " %s%s", ifp->name, VTY_NEWLINE); | |
3640 | } | |
3641 | } | |
3642 | } | |
3643 | ||
718e3744 | 3644 | vty_out (vty, " Routing Information Sources:%s", VTY_NEWLINE); |
3645 | vty_out (vty, " Gateway BadPackets BadRoutes Distance Last Update%s", VTY_NEWLINE); | |
3646 | rip_peer_display (vty); | |
3647 | ||
3648 | rip_distance_show (vty); | |
3649 | ||
3650 | return CMD_SUCCESS; | |
3651 | } | |
3652 | ||
3653 | /* RIP configuration write function. */ | |
dc63bfd4 | 3654 | static int |
718e3744 | 3655 | config_write_rip (struct vty *vty) |
3656 | { | |
3657 | int write = 0; | |
3658 | struct route_node *rn; | |
3659 | struct rip_distance *rdistance; | |
3660 | ||
3661 | if (rip) | |
3662 | { | |
3663 | /* Router RIP statement. */ | |
3664 | vty_out (vty, "router rip%s", VTY_NEWLINE); | |
3665 | write++; | |
3666 | ||
3667 | /* RIP version statement. Default is RIP version 2. */ | |
f38a471c | 3668 | if (rip->version_send != RI_RIP_VERSION_2 |
3669 | || rip->version_recv != RI_RIP_VERSION_1_AND_2) | |
3670 | vty_out (vty, " version %d%s", rip->version_send, | |
718e3744 | 3671 | VTY_NEWLINE); |
3672 | ||
3673 | /* RIP timer configuration. */ | |
3674 | if (rip->update_time != RIP_UPDATE_TIMER_DEFAULT | |
3675 | || rip->timeout_time != RIP_TIMEOUT_TIMER_DEFAULT | |
3676 | || rip->garbage_time != RIP_GARBAGE_TIMER_DEFAULT) | |
3677 | vty_out (vty, " timers basic %lu %lu %lu%s", | |
3678 | rip->update_time, | |
3679 | rip->timeout_time, | |
3680 | rip->garbage_time, | |
3681 | VTY_NEWLINE); | |
3682 | ||
3683 | /* Default information configuration. */ | |
3684 | if (rip->default_information) | |
3685 | { | |
3686 | if (rip->default_information_route_map) | |
3687 | vty_out (vty, " default-information originate route-map %s%s", | |
3688 | rip->default_information_route_map, VTY_NEWLINE); | |
3689 | else | |
3690 | vty_out (vty, " default-information originate%s", | |
3691 | VTY_NEWLINE); | |
3692 | } | |
3693 | ||
3694 | /* Redistribute configuration. */ | |
3695 | config_write_rip_redistribute (vty, 1); | |
3696 | ||
3697 | /* RIP offset-list configuration. */ | |
3698 | config_write_rip_offset_list (vty); | |
3699 | ||
3700 | /* RIP enabled network and interface configuration. */ | |
3701 | config_write_rip_network (vty, 1); | |
3702 | ||
3703 | /* RIP default metric configuration */ | |
3704 | if (rip->default_metric != RIP_DEFAULT_METRIC_DEFAULT) | |
3705 | vty_out (vty, " default-metric %d%s", | |
3706 | rip->default_metric, VTY_NEWLINE); | |
3707 | ||
3708 | /* Distribute configuration. */ | |
3709 | write += config_write_distribute (vty); | |
3710 | ||
16705130 | 3711 | /* Interface routemap configuration */ |
3712 | write += config_write_if_rmap (vty); | |
3713 | ||
718e3744 | 3714 | /* Distance configuration. */ |
3715 | if (rip->distance) | |
3716 | vty_out (vty, " distance %d%s", rip->distance, VTY_NEWLINE); | |
3717 | ||
3718 | /* RIP source IP prefix distance configuration. */ | |
3719 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3720 | if ((rdistance = rn->info) != NULL) | |
3721 | vty_out (vty, " distance %d %s/%d %s%s", rdistance->distance, | |
3722 | inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
3723 | rdistance->access_list ? rdistance->access_list : "", | |
3724 | VTY_NEWLINE); | |
3725 | ||
8478ae7e LF |
3726 | /* ECMP configuration. */ |
3727 | if (rip->ecmp) | |
3728 | vty_out (vty, " allow-ecmp%s", VTY_NEWLINE); | |
3729 | ||
718e3744 | 3730 | /* RIP static route configuration. */ |
3731 | for (rn = route_top (rip->route); rn; rn = route_next (rn)) | |
3732 | if (rn->info) | |
3733 | vty_out (vty, " route %s/%d%s", | |
3734 | inet_ntoa (rn->p.u.prefix4), | |
3735 | rn->p.prefixlen, | |
3736 | VTY_NEWLINE); | |
3737 | ||
3738 | } | |
3739 | return write; | |
3740 | } | |
3741 | ||
3742 | /* RIP node structure. */ | |
7fc626de | 3743 | static struct cmd_node rip_node = |
718e3744 | 3744 | { |
3745 | RIP_NODE, | |
3746 | "%s(config-router)# ", | |
3747 | 1 | |
3748 | }; | |
6b0655a2 | 3749 | |
718e3744 | 3750 | /* Distribute-list update functions. */ |
dc63bfd4 | 3751 | static void |
718e3744 | 3752 | rip_distribute_update (struct distribute *dist) |
3753 | { | |
3754 | struct interface *ifp; | |
3755 | struct rip_interface *ri; | |
3756 | struct access_list *alist; | |
3757 | struct prefix_list *plist; | |
3758 | ||
3759 | if (! dist->ifname) | |
3760 | return; | |
3761 | ||
3762 | ifp = if_lookup_by_name (dist->ifname); | |
3763 | if (ifp == NULL) | |
3764 | return; | |
3765 | ||
3766 | ri = ifp->info; | |
3767 | ||
fb23cf4a | 3768 | if (dist->list[DISTRIBUTE_V4_IN]) |
718e3744 | 3769 | { |
fb23cf4a | 3770 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_V4_IN]); |
718e3744 | 3771 | if (alist) |
3772 | ri->list[RIP_FILTER_IN] = alist; | |
3773 | else | |
3774 | ri->list[RIP_FILTER_IN] = NULL; | |
3775 | } | |
3776 | else | |
3777 | ri->list[RIP_FILTER_IN] = NULL; | |
3778 | ||
fb23cf4a | 3779 | if (dist->list[DISTRIBUTE_V4_OUT]) |
718e3744 | 3780 | { |
fb23cf4a | 3781 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_V4_OUT]); |
718e3744 | 3782 | if (alist) |
3783 | ri->list[RIP_FILTER_OUT] = alist; | |
3784 | else | |
3785 | ri->list[RIP_FILTER_OUT] = NULL; | |
3786 | } | |
3787 | else | |
3788 | ri->list[RIP_FILTER_OUT] = NULL; | |
3789 | ||
fb23cf4a | 3790 | if (dist->prefix[DISTRIBUTE_V4_IN]) |
718e3744 | 3791 | { |
fb23cf4a | 3792 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_V4_IN]); |
718e3744 | 3793 | if (plist) |
3794 | ri->prefix[RIP_FILTER_IN] = plist; | |
3795 | else | |
3796 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3797 | } | |
3798 | else | |
3799 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3800 | ||
fb23cf4a | 3801 | if (dist->prefix[DISTRIBUTE_V4_OUT]) |
718e3744 | 3802 | { |
fb23cf4a | 3803 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_V4_OUT]); |
718e3744 | 3804 | if (plist) |
3805 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3806 | else | |
3807 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3808 | } | |
3809 | else | |
3810 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3811 | } | |
3812 | ||
3813 | void | |
3814 | rip_distribute_update_interface (struct interface *ifp) | |
3815 | { | |
3816 | struct distribute *dist; | |
3817 | ||
3818 | dist = distribute_lookup (ifp->name); | |
3819 | if (dist) | |
3820 | rip_distribute_update (dist); | |
3821 | } | |
3822 | ||
3823 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3824 | /* ARGSUSED */ |
dc63bfd4 | 3825 | static void |
02ff83c5 | 3826 | rip_distribute_update_all (struct prefix_list *notused) |
718e3744 | 3827 | { |
3828 | struct interface *ifp; | |
1eb8ef25 | 3829 | struct listnode *node, *nnode; |
718e3744 | 3830 | |
b2d7c082 | 3831 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), node, nnode, ifp)) |
1eb8ef25 | 3832 | rip_distribute_update_interface (ifp); |
718e3744 | 3833 | } |
11dde9c2 | 3834 | /* ARGSUSED */ |
dc63bfd4 | 3835 | static void |
11dde9c2 | 3836 | rip_distribute_update_all_wrapper(struct access_list *notused) |
3837 | { | |
02ff83c5 | 3838 | rip_distribute_update_all(NULL); |
11dde9c2 | 3839 | } |
6b0655a2 | 3840 | |
718e3744 | 3841 | /* Delete all added rip route. */ |
3842 | void | |
216565ab | 3843 | rip_clean (void) |
718e3744 | 3844 | { |
3845 | int i; | |
3846 | struct route_node *rp; | |
bce8e868 LF |
3847 | struct rip_info *rinfo = NULL; |
3848 | struct list *list = NULL; | |
3849 | struct listnode *listnode = NULL; | |
718e3744 | 3850 | |
3851 | if (rip) | |
3852 | { | |
3853 | /* Clear RIP routes */ | |
3854 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
bce8e868 LF |
3855 | if ((list = rp->info) != NULL) |
3856 | { | |
3857 | rinfo = listgetdata (listhead (list)); | |
3858 | if (rip_route_rte (rinfo)) | |
3859 | rip_zebra_ipv4_delete (rp); | |
3860 | ||
3861 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
3862 | { | |
3863 | RIP_TIMER_OFF (rinfo->t_timeout); | |
3864 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
3865 | rip_info_free (rinfo); | |
3866 | } | |
3867 | list_delete (list); | |
3868 | rp->info = NULL; | |
3869 | route_unlock_node (rp); | |
3870 | } | |
718e3744 | 3871 | |
3872 | /* Cancel RIP related timers. */ | |
3873 | RIP_TIMER_OFF (rip->t_update); | |
3874 | RIP_TIMER_OFF (rip->t_triggered_update); | |
3875 | RIP_TIMER_OFF (rip->t_triggered_interval); | |
3876 | ||
3877 | /* Cancel read thread. */ | |
8578874d | 3878 | THREAD_READ_OFF (rip->t_read); |
718e3744 | 3879 | |
3880 | /* Close RIP socket. */ | |
3881 | if (rip->sock >= 0) | |
3882 | { | |
3883 | close (rip->sock); | |
3884 | rip->sock = -1; | |
3885 | } | |
3886 | ||
3887 | /* Static RIP route configuration. */ | |
3888 | for (rp = route_top (rip->route); rp; rp = route_next (rp)) | |
3889 | if (rp->info) | |
3890 | { | |
3891 | rp->info = NULL; | |
3892 | route_unlock_node (rp); | |
3893 | } | |
3894 | ||
3895 | /* RIP neighbor configuration. */ | |
3896 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) | |
3897 | if (rp->info) | |
3898 | { | |
3899 | rp->info = NULL; | |
3900 | route_unlock_node (rp); | |
3901 | } | |
3902 | ||
3903 | /* Redistribute related clear. */ | |
3904 | if (rip->default_information_route_map) | |
3905 | free (rip->default_information_route_map); | |
3906 | ||
3907 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
3908 | if (rip->route_map[i].name) | |
3909 | free (rip->route_map[i].name); | |
3910 | ||
3911 | XFREE (MTYPE_ROUTE_TABLE, rip->table); | |
3912 | XFREE (MTYPE_ROUTE_TABLE, rip->route); | |
3913 | XFREE (MTYPE_ROUTE_TABLE, rip->neighbor); | |
3914 | ||
3915 | XFREE (MTYPE_RIP, rip); | |
3916 | rip = NULL; | |
3917 | } | |
3918 | ||
3919 | rip_clean_network (); | |
4aaff3f8 | 3920 | rip_passive_nondefault_clean (); |
718e3744 | 3921 | rip_offset_clean (); |
1dec2166 | 3922 | rip_interfaces_clean (); |
718e3744 | 3923 | rip_distance_reset (); |
3924 | rip_redistribute_clean (); | |
3925 | } | |
3926 | ||
3927 | /* Reset all values to the default settings. */ | |
3928 | void | |
216565ab | 3929 | rip_reset (void) |
718e3744 | 3930 | { |
3931 | /* Reset global counters. */ | |
3932 | rip_global_route_changes = 0; | |
3933 | rip_global_queries = 0; | |
3934 | ||
3935 | /* Call ripd related reset functions. */ | |
3936 | rip_debug_reset (); | |
3937 | rip_route_map_reset (); | |
3938 | ||
3939 | /* Call library reset functions. */ | |
3940 | vty_reset (); | |
3941 | access_list_reset (); | |
3942 | prefix_list_reset (); | |
3943 | ||
3944 | distribute_list_reset (); | |
3945 | ||
1dec2166 | 3946 | rip_interfaces_reset (); |
718e3744 | 3947 | rip_distance_reset (); |
3948 | ||
3949 | rip_zclient_reset (); | |
3950 | } | |
3951 | ||
dc63bfd4 | 3952 | static void |
16705130 | 3953 | rip_if_rmap_update (struct if_rmap *if_rmap) |
3954 | { | |
3955 | struct interface *ifp; | |
3956 | struct rip_interface *ri; | |
3957 | struct route_map *rmap; | |
3958 | ||
3959 | ifp = if_lookup_by_name (if_rmap->ifname); | |
3960 | if (ifp == NULL) | |
3961 | return; | |
3962 | ||
3963 | ri = ifp->info; | |
3964 | ||
3965 | if (if_rmap->routemap[IF_RMAP_IN]) | |
3966 | { | |
3967 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_IN]); | |
3968 | if (rmap) | |
3969 | ri->routemap[IF_RMAP_IN] = rmap; | |
3970 | else | |
3971 | ri->routemap[IF_RMAP_IN] = NULL; | |
3972 | } | |
3973 | else | |
3974 | ri->routemap[RIP_FILTER_IN] = NULL; | |
3975 | ||
3976 | if (if_rmap->routemap[IF_RMAP_OUT]) | |
3977 | { | |
3978 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_OUT]); | |
3979 | if (rmap) | |
3980 | ri->routemap[IF_RMAP_OUT] = rmap; | |
3981 | else | |
3982 | ri->routemap[IF_RMAP_OUT] = NULL; | |
3983 | } | |
3984 | else | |
3985 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
3986 | } | |
3987 | ||
3988 | void | |
3989 | rip_if_rmap_update_interface (struct interface *ifp) | |
3990 | { | |
3991 | struct if_rmap *if_rmap; | |
3992 | ||
3993 | if_rmap = if_rmap_lookup (ifp->name); | |
3994 | if (if_rmap) | |
3995 | rip_if_rmap_update (if_rmap); | |
3996 | } | |
3997 | ||
dc63bfd4 | 3998 | static void |
16705130 | 3999 | rip_routemap_update_redistribute (void) |
4000 | { | |
4001 | int i; | |
4002 | ||
4003 | if (rip) | |
4004 | { | |
4005 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
4006 | { | |
4007 | if (rip->route_map[i].name) | |
4008 | rip->route_map[i].map = | |
4009 | route_map_lookup_by_name (rip->route_map[i].name); | |
4010 | } | |
4011 | } | |
4012 | } | |
4013 | ||
11dde9c2 | 4014 | /* ARGSUSED */ |
dc63bfd4 | 4015 | static void |
98b718a9 | 4016 | rip_routemap_update (const char *notused) |
16705130 | 4017 | { |
4018 | struct interface *ifp; | |
1eb8ef25 | 4019 | struct listnode *node, *nnode; |
16705130 | 4020 | |
b2d7c082 | 4021 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), node, nnode, ifp)) |
1eb8ef25 | 4022 | rip_if_rmap_update_interface (ifp); |
16705130 | 4023 | |
4024 | rip_routemap_update_redistribute (); | |
4025 | } | |
4026 | ||
718e3744 | 4027 | /* Allocate new rip structure and set default value. */ |
4028 | void | |
dc63bfd4 | 4029 | rip_init (void) |
718e3744 | 4030 | { |
4031 | /* Randomize for triggered update random(). */ | |
b06fd125 | 4032 | srandom (time (NULL)); |
718e3744 | 4033 | |
4034 | /* Install top nodes. */ | |
4035 | install_node (&rip_node, config_write_rip); | |
4036 | ||
4037 | /* Install rip commands. */ | |
4038 | install_element (VIEW_NODE, &show_ip_rip_cmd); | |
16705130 | 4039 | install_element (VIEW_NODE, &show_ip_rip_status_cmd); |
718e3744 | 4040 | install_element (CONFIG_NODE, &router_rip_cmd); |
4041 | install_element (CONFIG_NODE, &no_router_rip_cmd); | |
4042 | ||
4043 | install_default (RIP_NODE); | |
4044 | install_element (RIP_NODE, &rip_version_cmd); | |
4045 | install_element (RIP_NODE, &no_rip_version_cmd); | |
4046 | install_element (RIP_NODE, &no_rip_version_val_cmd); | |
4047 | install_element (RIP_NODE, &rip_default_metric_cmd); | |
4048 | install_element (RIP_NODE, &no_rip_default_metric_cmd); | |
4049 | install_element (RIP_NODE, &no_rip_default_metric_val_cmd); | |
4050 | install_element (RIP_NODE, &rip_timers_cmd); | |
4051 | install_element (RIP_NODE, &no_rip_timers_cmd); | |
16705130 | 4052 | install_element (RIP_NODE, &no_rip_timers_val_cmd); |
718e3744 | 4053 | install_element (RIP_NODE, &rip_route_cmd); |
4054 | install_element (RIP_NODE, &no_rip_route_cmd); | |
4055 | install_element (RIP_NODE, &rip_distance_cmd); | |
4056 | install_element (RIP_NODE, &no_rip_distance_cmd); | |
4057 | install_element (RIP_NODE, &rip_distance_source_cmd); | |
4058 | install_element (RIP_NODE, &no_rip_distance_source_cmd); | |
4059 | install_element (RIP_NODE, &rip_distance_source_access_list_cmd); | |
4060 | install_element (RIP_NODE, &no_rip_distance_source_access_list_cmd); | |
8478ae7e LF |
4061 | install_element (RIP_NODE, &rip_allow_ecmp_cmd); |
4062 | install_element (RIP_NODE, &no_rip_allow_ecmp_cmd); | |
718e3744 | 4063 | |
4064 | /* Debug related init. */ | |
4065 | rip_debug_init (); | |
4066 | ||
718e3744 | 4067 | /* SNMP init. */ |
4068 | #ifdef HAVE_SNMP | |
4069 | rip_snmp_init (); | |
4070 | #endif /* HAVE_SNMP */ | |
4071 | ||
4072 | /* Access list install. */ | |
4073 | access_list_init (); | |
11dde9c2 | 4074 | access_list_add_hook (rip_distribute_update_all_wrapper); |
4075 | access_list_delete_hook (rip_distribute_update_all_wrapper); | |
718e3744 | 4076 | |
4077 | /* Prefix list initialize.*/ | |
4078 | prefix_list_init (); | |
4079 | prefix_list_add_hook (rip_distribute_update_all); | |
4080 | prefix_list_delete_hook (rip_distribute_update_all); | |
4081 | ||
4082 | /* Distribute list install. */ | |
4083 | distribute_list_init (RIP_NODE); | |
4084 | distribute_list_add_hook (rip_distribute_update); | |
4085 | distribute_list_delete_hook (rip_distribute_update); | |
4086 | ||
16705130 | 4087 | /* Route-map */ |
4088 | rip_route_map_init (); | |
4089 | rip_offset_init (); | |
4090 | ||
4091 | route_map_add_hook (rip_routemap_update); | |
4092 | route_map_delete_hook (rip_routemap_update); | |
4093 | ||
4094 | if_rmap_init (RIP_NODE); | |
4095 | if_rmap_hook_add (rip_if_rmap_update); | |
4096 | if_rmap_hook_delete (rip_if_rmap_update); | |
4097 | ||
718e3744 | 4098 | /* Distance control. */ |
4099 | rip_distance_table = route_table_init (); | |
4100 | } |