]>
Commit | Line | Data |
---|---|---|
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 | ||
25 | #include "if.h" | |
26 | #include "command.h" | |
27 | #include "prefix.h" | |
28 | #include "table.h" | |
29 | #include "thread.h" | |
30 | #include "memory.h" | |
31 | #include "log.h" | |
32 | #include "stream.h" | |
33 | #include "filter.h" | |
34 | #include "sockunion.h" | |
1af81933 | 35 | #include "sockopt.h" |
718e3744 | 36 | #include "routemap.h" |
16705130 | 37 | #include "if_rmap.h" |
718e3744 | 38 | #include "plist.h" |
39 | #include "distribute.h" | |
c1a03d47 | 40 | #include "md5.h" |
718e3744 | 41 | #include "keychain.h" |
edd7c245 | 42 | #include "privs.h" |
718e3744 | 43 | |
44 | #include "ripd/ripd.h" | |
45 | #include "ripd/rip_debug.h" | |
46 | ||
0b3acf4f | 47 | /* UDP receive buffer size */ |
48 | #define RIP_UDP_RCV_BUF 41600 | |
49 | ||
50 | /* privileges global */ | |
edd7c245 | 51 | extern struct zebra_privs_t ripd_privs; |
52 | ||
718e3744 | 53 | /* RIP Structure. */ |
54 | struct rip *rip = NULL; | |
55 | ||
56 | /* RIP neighbor address table. */ | |
57 | struct route_table *rip_neighbor_table; | |
58 | ||
59 | /* RIP route changes. */ | |
60 | long rip_global_route_changes = 0; | |
61 | ||
62 | /* RIP queries. */ | |
63 | long rip_global_queries = 0; | |
64 | \f | |
65 | /* Prototypes. */ | |
dc63bfd4 | 66 | static void rip_event (enum rip_event, int); |
67 | static void rip_output_process (struct connected *, struct sockaddr_in *, int, u_char); | |
68 | static int rip_triggered_update (struct thread *); | |
69 | static int rip_update_jitter (unsigned long); | |
70 | \f | |
718e3744 | 71 | /* RIP output routes type. */ |
72 | enum | |
73 | { | |
74 | rip_all_route, | |
75 | rip_changed_route | |
76 | }; | |
77 | \f | |
78 | /* RIP command strings. */ | |
79 | struct message rip_msg[] = | |
80 | { | |
81 | {RIP_REQUEST, "REQUEST"}, | |
82 | {RIP_RESPONSE, "RESPONSE"}, | |
83 | {RIP_TRACEON, "TRACEON"}, | |
84 | {RIP_TRACEOFF, "TRACEOFF"}, | |
85 | {RIP_POLL, "POLL"}, | |
86 | {RIP_POLL_ENTRY, "POLL ENTRY"}, | |
87 | {0, NULL} | |
88 | }; | |
718e3744 | 89 | \f |
90 | /* Utility function to set boradcast option to the socket. */ | |
dc63bfd4 | 91 | static int |
718e3744 | 92 | sockopt_broadcast (int sock) |
93 | { | |
94 | int ret; | |
95 | int on = 1; | |
96 | ||
97 | ret = setsockopt (sock, SOL_SOCKET, SO_BROADCAST, (char *) &on, sizeof on); | |
98 | if (ret < 0) | |
99 | { | |
100 | zlog_warn ("can't set sockopt SO_BROADCAST to socket %d", sock); | |
101 | return -1; | |
102 | } | |
103 | return 0; | |
104 | } | |
105 | ||
dc63bfd4 | 106 | static int |
718e3744 | 107 | rip_route_rte (struct rip_info *rinfo) |
108 | { | |
109 | return (rinfo->type == ZEBRA_ROUTE_RIP && rinfo->sub_type == RIP_ROUTE_RTE); | |
110 | } | |
111 | ||
dc63bfd4 | 112 | static struct rip_info * |
718e3744 | 113 | rip_info_new () |
114 | { | |
115 | struct rip_info *new; | |
116 | ||
117 | new = XMALLOC (MTYPE_RIP_INFO, sizeof (struct rip_info)); | |
118 | memset (new, 0, sizeof (struct rip_info)); | |
119 | return new; | |
120 | } | |
121 | ||
122 | void | |
123 | rip_info_free (struct rip_info *rinfo) | |
124 | { | |
125 | XFREE (MTYPE_RIP_INFO, rinfo); | |
126 | } | |
127 | ||
128 | /* RIP route garbage collect timer. */ | |
dc63bfd4 | 129 | static int |
718e3744 | 130 | rip_garbage_collect (struct thread *t) |
131 | { | |
132 | struct rip_info *rinfo; | |
133 | struct route_node *rp; | |
134 | ||
135 | rinfo = THREAD_ARG (t); | |
136 | rinfo->t_garbage_collect = NULL; | |
137 | ||
138 | /* Off timeout timer. */ | |
139 | RIP_TIMER_OFF (rinfo->t_timeout); | |
140 | ||
141 | /* Get route_node pointer. */ | |
142 | rp = rinfo->rp; | |
143 | ||
144 | /* Unlock route_node. */ | |
145 | rp->info = NULL; | |
146 | route_unlock_node (rp); | |
147 | ||
148 | /* Free RIP routing information. */ | |
149 | rip_info_free (rinfo); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | /* Timeout RIP routes. */ | |
dc63bfd4 | 155 | static int |
718e3744 | 156 | rip_timeout (struct thread *t) |
157 | { | |
158 | struct rip_info *rinfo; | |
159 | struct route_node *rn; | |
160 | ||
161 | rinfo = THREAD_ARG (t); | |
162 | rinfo->t_timeout = NULL; | |
163 | ||
164 | rn = rinfo->rp; | |
165 | ||
166 | /* - The garbage-collection timer is set for 120 seconds. */ | |
167 | RIP_TIMER_ON (rinfo->t_garbage_collect, rip_garbage_collect, | |
168 | rip->garbage_time); | |
169 | ||
170 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rn->p, &rinfo->nexthop, | |
171 | rinfo->metric); | |
172 | /* - The metric for the route is set to 16 (infinity). This causes | |
173 | the route to be removed from service. */ | |
174 | rinfo->metric = RIP_METRIC_INFINITY; | |
175 | rinfo->flags &= ~RIP_RTF_FIB; | |
176 | ||
177 | /* - The route change flag is to indicate that this entry has been | |
178 | changed. */ | |
179 | rinfo->flags |= RIP_RTF_CHANGED; | |
180 | ||
181 | /* - The output process is signalled to trigger a response. */ | |
182 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
dc63bfd4 | 187 | static void |
718e3744 | 188 | rip_timeout_update (struct rip_info *rinfo) |
189 | { | |
190 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
191 | { | |
192 | RIP_TIMER_OFF (rinfo->t_timeout); | |
193 | RIP_TIMER_ON (rinfo->t_timeout, rip_timeout, rip->timeout_time); | |
194 | } | |
195 | } | |
196 | ||
dc63bfd4 | 197 | static int |
718e3744 | 198 | rip_incoming_filter (struct prefix_ipv4 *p, struct rip_interface *ri) |
199 | { | |
200 | struct distribute *dist; | |
201 | struct access_list *alist; | |
202 | struct prefix_list *plist; | |
203 | ||
204 | /* Input distribute-list filtering. */ | |
205 | if (ri->list[RIP_FILTER_IN]) | |
206 | { | |
207 | if (access_list_apply (ri->list[RIP_FILTER_IN], | |
208 | (struct prefix *) p) == FILTER_DENY) | |
209 | { | |
210 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 211 | zlog_debug ("%s/%d filtered by distribute in", |
718e3744 | 212 | inet_ntoa (p->prefix), p->prefixlen); |
213 | return -1; | |
214 | } | |
215 | } | |
216 | if (ri->prefix[RIP_FILTER_IN]) | |
217 | { | |
218 | if (prefix_list_apply (ri->prefix[RIP_FILTER_IN], | |
219 | (struct prefix *) p) == PREFIX_DENY) | |
220 | { | |
221 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 222 | zlog_debug ("%s/%d filtered by prefix-list in", |
718e3744 | 223 | inet_ntoa (p->prefix), p->prefixlen); |
224 | return -1; | |
225 | } | |
226 | } | |
227 | ||
228 | /* All interface filter check. */ | |
229 | dist = distribute_lookup (NULL); | |
230 | if (dist) | |
231 | { | |
232 | if (dist->list[DISTRIBUTE_IN]) | |
233 | { | |
234 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]); | |
235 | ||
236 | if (alist) | |
237 | { | |
238 | if (access_list_apply (alist, | |
239 | (struct prefix *) p) == FILTER_DENY) | |
240 | { | |
241 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 242 | zlog_debug ("%s/%d filtered by distribute in", |
718e3744 | 243 | inet_ntoa (p->prefix), p->prefixlen); |
244 | return -1; | |
245 | } | |
246 | } | |
247 | } | |
248 | if (dist->prefix[DISTRIBUTE_IN]) | |
249 | { | |
250 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]); | |
251 | ||
252 | if (plist) | |
253 | { | |
254 | if (prefix_list_apply (plist, | |
255 | (struct prefix *) p) == PREFIX_DENY) | |
256 | { | |
257 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 258 | zlog_debug ("%s/%d filtered by prefix-list in", |
718e3744 | 259 | inet_ntoa (p->prefix), p->prefixlen); |
260 | return -1; | |
261 | } | |
262 | } | |
263 | } | |
264 | } | |
265 | return 0; | |
266 | } | |
267 | ||
dc63bfd4 | 268 | static int |
718e3744 | 269 | rip_outgoing_filter (struct prefix_ipv4 *p, struct rip_interface *ri) |
270 | { | |
271 | struct distribute *dist; | |
272 | struct access_list *alist; | |
273 | struct prefix_list *plist; | |
274 | ||
275 | if (ri->list[RIP_FILTER_OUT]) | |
276 | { | |
277 | if (access_list_apply (ri->list[RIP_FILTER_OUT], | |
278 | (struct prefix *) p) == FILTER_DENY) | |
279 | { | |
280 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 281 | zlog_debug ("%s/%d is filtered by distribute out", |
718e3744 | 282 | inet_ntoa (p->prefix), p->prefixlen); |
283 | return -1; | |
284 | } | |
285 | } | |
286 | if (ri->prefix[RIP_FILTER_OUT]) | |
287 | { | |
288 | if (prefix_list_apply (ri->prefix[RIP_FILTER_OUT], | |
289 | (struct prefix *) p) == PREFIX_DENY) | |
290 | { | |
291 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 292 | zlog_debug ("%s/%d is filtered by prefix-list out", |
718e3744 | 293 | inet_ntoa (p->prefix), p->prefixlen); |
294 | return -1; | |
295 | } | |
296 | } | |
297 | ||
298 | /* All interface filter check. */ | |
299 | dist = distribute_lookup (NULL); | |
300 | if (dist) | |
301 | { | |
302 | if (dist->list[DISTRIBUTE_OUT]) | |
303 | { | |
304 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]); | |
305 | ||
306 | if (alist) | |
307 | { | |
308 | if (access_list_apply (alist, | |
309 | (struct prefix *) p) == FILTER_DENY) | |
310 | { | |
311 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 312 | zlog_debug ("%s/%d filtered by distribute out", |
718e3744 | 313 | inet_ntoa (p->prefix), p->prefixlen); |
314 | return -1; | |
315 | } | |
316 | } | |
317 | } | |
318 | if (dist->prefix[DISTRIBUTE_OUT]) | |
319 | { | |
320 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]); | |
321 | ||
322 | if (plist) | |
323 | { | |
324 | if (prefix_list_apply (plist, | |
325 | (struct prefix *) p) == PREFIX_DENY) | |
326 | { | |
327 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 328 | zlog_debug ("%s/%d filtered by prefix-list out", |
718e3744 | 329 | inet_ntoa (p->prefix), p->prefixlen); |
330 | return -1; | |
331 | } | |
332 | } | |
333 | } | |
334 | } | |
335 | return 0; | |
336 | } | |
337 | ||
338 | /* Check nexthop address validity. */ | |
339 | static int | |
340 | rip_nexthop_check (struct in_addr *addr) | |
341 | { | |
52dc7ee6 | 342 | struct listnode *node; |
343 | struct listnode *cnode; | |
718e3744 | 344 | struct interface *ifp; |
345 | struct connected *ifc; | |
346 | struct prefix *p; | |
347 | ||
348 | /* If nexthop address matches local configured address then it is | |
349 | invalid nexthop. */ | |
1eb8ef25 | 350 | for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp)) |
718e3744 | 351 | { |
1eb8ef25 | 352 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, ifc)) |
718e3744 | 353 | { |
718e3744 | 354 | p = ifc->address; |
355 | ||
356 | if (p->family == AF_INET | |
357 | && IPV4_ADDR_SAME (&p->u.prefix4, addr)) | |
358 | return -1; | |
359 | } | |
360 | } | |
361 | return 0; | |
362 | } | |
363 | ||
364 | /* RIP add route to routing table. */ | |
dc63bfd4 | 365 | static void |
718e3744 | 366 | rip_rte_process (struct rte *rte, struct sockaddr_in *from, |
a87552cd | 367 | struct interface *ifp) |
718e3744 | 368 | { |
369 | int ret; | |
370 | struct prefix_ipv4 p; | |
371 | struct route_node *rp; | |
b94f9dbd | 372 | struct rip_info *rinfo, rinfotmp; |
718e3744 | 373 | struct rip_interface *ri; |
374 | struct in_addr *nexthop; | |
375 | u_char oldmetric; | |
376 | int same = 0; | |
fbf5d033 | 377 | int route_reuse = 0; |
378 | unsigned char old_dist, new_dist; | |
718e3744 | 379 | |
380 | /* Make prefix structure. */ | |
381 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
382 | p.family = AF_INET; | |
383 | p.prefix = rte->prefix; | |
384 | p.prefixlen = ip_masklen (rte->mask); | |
385 | ||
386 | /* Make sure mask is applied. */ | |
387 | apply_mask_ipv4 (&p); | |
388 | ||
389 | /* Apply input filters. */ | |
390 | ri = ifp->info; | |
391 | ||
392 | ret = rip_incoming_filter (&p, ri); | |
393 | if (ret < 0) | |
394 | return; | |
395 | ||
16705130 | 396 | /* Modify entry according to the interface routemap. */ |
397 | if (ri->routemap[RIP_FILTER_IN]) | |
398 | { | |
399 | int ret; | |
400 | struct rip_info newinfo; | |
401 | ||
402 | memset (&newinfo, 0, sizeof (newinfo)); | |
403 | newinfo.type = ZEBRA_ROUTE_RIP; | |
404 | newinfo.sub_type = RIP_ROUTE_RTE; | |
a87552cd | 405 | newinfo.nexthop = rte->nexthop; |
406 | newinfo.from = from->sin_addr; | |
407 | newinfo.ifindex = ifp->ifindex; | |
16705130 | 408 | newinfo.metric = rte->metric; |
409 | newinfo.metric_out = rte->metric; /* XXX */ | |
a87552cd | 410 | newinfo.tag = ntohs (rte->tag); /* XXX */ |
16705130 | 411 | |
412 | /* The object should be of the type of rip_info */ | |
a87552cd | 413 | ret = route_map_apply (ri->routemap[RIP_FILTER_IN], |
414 | (struct prefix *) &p, RMAP_RIP, &newinfo); | |
16705130 | 415 | |
416 | if (ret == RMAP_DENYMATCH) | |
a87552cd | 417 | { |
418 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 419 | zlog_debug ("RIP %s/%d is filtered by route-map in", |
a87552cd | 420 | inet_ntoa (p.prefix), p.prefixlen); |
421 | return; | |
422 | } | |
16705130 | 423 | |
424 | /* Get back the object */ | |
a87552cd | 425 | rte->nexthop = newinfo.nexthop_out; |
426 | rte->tag = htons (newinfo.tag_out); /* XXX */ | |
427 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the metric_out field */ | |
16705130 | 428 | } |
429 | ||
718e3744 | 430 | /* Once the entry has been validated, update the metric by |
431 | adding the cost of the network on wich the message | |
432 | arrived. If the result is greater than infinity, use infinity | |
433 | (RFC2453 Sec. 3.9.2) */ | |
434 | /* Zebra ripd can handle offset-list in. */ | |
435 | ret = rip_offset_list_apply_in (&p, ifp, &rte->metric); | |
436 | ||
437 | /* If offset-list does not modify the metric use interface's | |
438 | metric. */ | |
a87552cd | 439 | if (!ret) |
718e3744 | 440 | rte->metric += ifp->metric; |
441 | ||
442 | if (rte->metric > RIP_METRIC_INFINITY) | |
443 | rte->metric = RIP_METRIC_INFINITY; | |
444 | ||
445 | /* Set nexthop pointer. */ | |
446 | if (rte->nexthop.s_addr == 0) | |
447 | nexthop = &from->sin_addr; | |
448 | else | |
449 | nexthop = &rte->nexthop; | |
450 | ||
16705130 | 451 | /* Check if nexthop address is myself, then do nothing. */ |
718e3744 | 452 | if (rip_nexthop_check (nexthop) < 0) |
453 | { | |
454 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 455 | zlog_debug ("Nexthop address %s is myself", inet_ntoa (*nexthop)); |
718e3744 | 456 | return; |
457 | } | |
458 | ||
459 | /* Get index for the prefix. */ | |
460 | rp = route_node_get (rip->table, (struct prefix *) &p); | |
461 | ||
462 | /* Check to see whether there is already RIP route on the table. */ | |
463 | rinfo = rp->info; | |
464 | ||
465 | if (rinfo) | |
466 | { | |
718e3744 | 467 | /* Local static route. */ |
468 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
a87552cd | 469 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
470 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
471 | && rinfo->metric != RIP_METRIC_INFINITY) | |
fbf5d033 | 472 | { |
473 | route_unlock_node (rp); | |
474 | return; | |
475 | } | |
476 | ||
477 | /* Redistributed route check. */ | |
478 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
479 | && rinfo->metric != RIP_METRIC_INFINITY) | |
480 | { | |
481 | /* Fill in a minimaly temporary rip_info structure, for a future | |
482 | rip_distance_apply() use) */ | |
483 | memset (&rinfotmp, 0, sizeof (rinfotmp)); | |
484 | IPV4_ADDR_COPY (&rinfotmp.from, &from->sin_addr); | |
485 | rinfotmp.rp = rinfo->rp; | |
486 | new_dist = rip_distance_apply (&rinfotmp); | |
487 | new_dist = new_dist ? new_dist : ZEBRA_RIP_DISTANCE_DEFAULT; | |
488 | old_dist = rinfo->distance; | |
489 | old_dist = old_dist ? old_dist : ZEBRA_RIP_DISTANCE_DEFAULT; | |
490 | /* If imported route does not have STRICT precedence, | |
491 | mark it as a ghost */ | |
492 | if (new_dist > old_dist | |
493 | || rte->metric == RIP_METRIC_INFINITY) | |
494 | { | |
495 | route_unlock_node (rp); | |
496 | return; | |
497 | } | |
498 | else | |
499 | { | |
500 | RIP_TIMER_OFF (rinfo->t_timeout); | |
501 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
502 | ||
503 | rp->info = NULL; | |
504 | if (rip_route_rte (rinfo)) | |
505 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rp->p, | |
506 | &rinfo->nexthop, rinfo->metric); | |
507 | rip_info_free (rinfo); | |
508 | rinfo = NULL; | |
509 | route_reuse = 1; | |
510 | } | |
511 | } | |
718e3744 | 512 | } |
a87552cd | 513 | |
514 | if (!rinfo) | |
718e3744 | 515 | { |
516 | /* Now, check to see whether there is already an explicit route | |
a87552cd | 517 | for the destination prefix. If there is no such route, add |
518 | this route to the routing table, unless the metric is | |
519 | infinity (there is no point in adding a route which | |
520 | unusable). */ | |
718e3744 | 521 | if (rte->metric != RIP_METRIC_INFINITY) |
a87552cd | 522 | { |
523 | rinfo = rip_info_new (); | |
524 | ||
525 | /* - Setting the destination prefix and length to those in | |
526 | the RTE. */ | |
527 | rinfo->rp = rp; | |
528 | ||
529 | /* - Setting the metric to the newly calculated metric (as | |
530 | described above). */ | |
531 | rinfo->metric = rte->metric; | |
532 | rinfo->tag = ntohs (rte->tag); | |
533 | ||
534 | /* - Set the next hop address to be the address of the router | |
535 | from which the datagram came or the next hop address | |
536 | specified by a next hop RTE. */ | |
537 | IPV4_ADDR_COPY (&rinfo->nexthop, nexthop); | |
538 | IPV4_ADDR_COPY (&rinfo->from, &from->sin_addr); | |
539 | rinfo->ifindex = ifp->ifindex; | |
540 | ||
541 | /* - Initialize the timeout for the route. If the | |
542 | garbage-collection timer is running for this route, stop it | |
543 | (see section 2.3 for a discussion of the timers). */ | |
544 | rip_timeout_update (rinfo); | |
545 | ||
546 | /* - Set the route change flag. */ | |
547 | rinfo->flags |= RIP_RTF_CHANGED; | |
548 | ||
549 | /* - Signal the output process to trigger an update (see section | |
550 | 2.5). */ | |
551 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
552 | ||
553 | /* Finally, route goes into the kernel. */ | |
554 | rinfo->type = ZEBRA_ROUTE_RIP; | |
555 | rinfo->sub_type = RIP_ROUTE_RTE; | |
556 | ||
557 | /* Set distance value. */ | |
558 | rinfo->distance = rip_distance_apply (rinfo); | |
559 | ||
560 | rp->info = rinfo; | |
561 | rip_zebra_ipv4_add (&p, &rinfo->nexthop, rinfo->metric, | |
562 | rinfo->distance); | |
563 | rinfo->flags |= RIP_RTF_FIB; | |
564 | } | |
fbf5d033 | 565 | |
566 | /* Unlock temporary lock, i.e. same behaviour */ | |
567 | if (route_reuse) | |
568 | route_unlock_node (rp); | |
718e3744 | 569 | } |
570 | else | |
571 | { | |
572 | /* Route is there but we are not sure the route is RIP or not. */ | |
573 | rinfo = rp->info; | |
a87552cd | 574 | |
718e3744 | 575 | /* If there is an existing route, compare the next hop address |
a87552cd | 576 | to the address of the router from which the datagram came. |
577 | If this datagram is from the same router as the existing | |
578 | route, reinitialize the timeout. */ | |
16705130 | 579 | same = (IPV4_ADDR_SAME (&rinfo->from, &from->sin_addr) |
a87552cd | 580 | && (rinfo->ifindex == ifp->ifindex)); |
718e3744 | 581 | |
582 | if (same) | |
a87552cd | 583 | rip_timeout_update (rinfo); |
718e3744 | 584 | |
b94f9dbd | 585 | |
586 | /* Fill in a minimaly temporary rip_info structure, for a future | |
587 | rip_distance_apply() use) */ | |
a87552cd | 588 | memset (&rinfotmp, 0, sizeof (rinfotmp)); |
b94f9dbd | 589 | IPV4_ADDR_COPY (&rinfotmp.from, &from->sin_addr); |
a87552cd | 590 | rinfotmp.rp = rinfo->rp; |
b94f9dbd | 591 | |
592 | ||
718e3744 | 593 | /* Next, compare the metrics. If the datagram is from the same |
a87552cd | 594 | router as the existing route, and the new metric is different |
595 | than the old one; or, if the new metric is lower than the old | |
596 | one, or if the tag has been changed; or if there is a route | |
597 | with a lower administrave distance; or an update of the | |
598 | distance on the actual route; do the following actions: */ | |
599 | if ((same && rinfo->metric != rte->metric) | |
600 | || (rte->metric < rinfo->metric) | |
601 | || ((same) | |
602 | && (rinfo->metric == rte->metric) | |
603 | && ntohs (rte->tag) != rinfo->tag) | |
604 | || (rinfo->distance > rip_distance_apply (&rinfotmp)) | |
605 | || ((rinfo->distance != rip_distance_apply (rinfo)) && same)) | |
606 | { | |
607 | /* - Adopt the route from the datagram. That is, put the | |
608 | new metric in, and adjust the next hop address (if | |
609 | necessary). */ | |
610 | oldmetric = rinfo->metric; | |
611 | rinfo->metric = rte->metric; | |
612 | rinfo->tag = ntohs (rte->tag); | |
613 | IPV4_ADDR_COPY (&rinfo->from, &from->sin_addr); | |
614 | rinfo->ifindex = ifp->ifindex; | |
615 | rinfo->distance = rip_distance_apply (rinfo); | |
616 | ||
617 | /* Should a new route to this network be established | |
618 | while the garbage-collection timer is running, the | |
619 | new route will replace the one that is about to be | |
620 | deleted. In this case the garbage-collection timer | |
621 | must be cleared. */ | |
622 | ||
623 | if (oldmetric == RIP_METRIC_INFINITY && | |
624 | rinfo->metric < RIP_METRIC_INFINITY) | |
625 | { | |
626 | rinfo->type = ZEBRA_ROUTE_RIP; | |
627 | rinfo->sub_type = RIP_ROUTE_RTE; | |
718e3744 | 628 | |
a87552cd | 629 | RIP_TIMER_OFF (rinfo->t_garbage_collect); |
718e3744 | 630 | |
a87552cd | 631 | if (!IPV4_ADDR_SAME (&rinfo->nexthop, nexthop)) |
632 | IPV4_ADDR_COPY (&rinfo->nexthop, nexthop); | |
718e3744 | 633 | |
a87552cd | 634 | rip_zebra_ipv4_add (&p, nexthop, rinfo->metric, |
635 | rinfo->distance); | |
636 | rinfo->flags |= RIP_RTF_FIB; | |
637 | } | |
718e3744 | 638 | |
a87552cd | 639 | /* Update nexthop and/or metric value. */ |
640 | if (oldmetric != RIP_METRIC_INFINITY) | |
641 | { | |
642 | rip_zebra_ipv4_delete (&p, &rinfo->nexthop, oldmetric); | |
643 | rip_zebra_ipv4_add (&p, nexthop, rinfo->metric, | |
644 | rinfo->distance); | |
645 | rinfo->flags |= RIP_RTF_FIB; | |
646 | ||
647 | if (!IPV4_ADDR_SAME (&rinfo->nexthop, nexthop)) | |
648 | IPV4_ADDR_COPY (&rinfo->nexthop, nexthop); | |
649 | } | |
650 | ||
651 | /* - Set the route change flag and signal the output process | |
652 | to trigger an update. */ | |
653 | rinfo->flags |= RIP_RTF_CHANGED; | |
654 | rip_event (RIP_TRIGGERED_UPDATE, 0); | |
655 | ||
656 | /* - If the new metric is infinity, start the deletion | |
657 | process (described above); */ | |
658 | if (rinfo->metric == RIP_METRIC_INFINITY) | |
659 | { | |
660 | /* If the new metric is infinity, the deletion process | |
661 | begins for the route, which is no longer used for | |
662 | routing packets. Note that the deletion process is | |
663 | started only when the metric is first set to | |
664 | infinity. If the metric was already infinity, then a | |
665 | new deletion process is not started. */ | |
666 | if (oldmetric != RIP_METRIC_INFINITY) | |
667 | { | |
668 | /* - The garbage-collection timer is set for 120 seconds. */ | |
669 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
670 | rip_garbage_collect, rip->garbage_time); | |
671 | RIP_TIMER_OFF (rinfo->t_timeout); | |
672 | ||
673 | /* - The metric for the route is set to 16 | |
674 | (infinity). This causes the route to be removed | |
675 | from service. */ | |
676 | rip_zebra_ipv4_delete (&p, &rinfo->nexthop, oldmetric); | |
677 | rinfo->flags &= ~RIP_RTF_FIB; | |
678 | ||
679 | /* - The route change flag is to indicate that this | |
680 | entry has been changed. */ | |
681 | /* - The output process is signalled to trigger a | |
718e3744 | 682 | response. */ |
a87552cd | 683 | ; /* Above processes are already done previously. */ |
684 | } | |
685 | } | |
686 | else | |
687 | { | |
688 | /* otherwise, re-initialize the timeout. */ | |
689 | rip_timeout_update (rinfo); | |
690 | } | |
691 | } | |
718e3744 | 692 | /* Unlock tempolary lock of the route. */ |
693 | route_unlock_node (rp); | |
694 | } | |
695 | } | |
696 | ||
697 | /* Dump RIP packet */ | |
dc63bfd4 | 698 | static void |
8a676be3 | 699 | rip_packet_dump (struct rip_packet *packet, int size, const char *sndrcv) |
718e3744 | 700 | { |
701 | caddr_t lim; | |
702 | struct rte *rte; | |
8a676be3 | 703 | const char *command_str; |
718e3744 | 704 | char pbuf[BUFSIZ], nbuf[BUFSIZ]; |
705 | u_char netmask = 0; | |
706 | u_char *p; | |
707 | ||
708 | /* Set command string. */ | |
709 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
710 | command_str = lookup (rip_msg, packet->command); | |
711 | else | |
712 | command_str = "unknown"; | |
713 | ||
714 | /* Dump packet header. */ | |
5d6c3779 | 715 | zlog_debug ("%s %s version %d packet size %d", |
718e3744 | 716 | sndrcv, command_str, packet->version, size); |
717 | ||
718 | /* Dump each routing table entry. */ | |
719 | rte = packet->rte; | |
720 | ||
721 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) | |
722 | { | |
723 | if (packet->version == RIPv2) | |
724 | { | |
725 | netmask = ip_masklen (rte->mask); | |
726 | ||
ca5e516c | 727 | if (rte->family == htons (RIP_FAMILY_AUTH)) |
718e3744 | 728 | { |
ca5e516c | 729 | if (rte->tag == htons (RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 730 | { |
731 | p = (u_char *)&rte->prefix; | |
732 | ||
5d6c3779 | 733 | zlog_debug (" family 0x%X type %d auth string: %s", |
718e3744 | 734 | ntohs (rte->family), ntohs (rte->tag), p); |
735 | } | |
ca5e516c | 736 | else if (rte->tag == htons (RIP_AUTH_MD5)) |
718e3744 | 737 | { |
738 | struct rip_md5_info *md5; | |
739 | ||
740 | md5 = (struct rip_md5_info *) &packet->rte; | |
741 | ||
5d6c3779 | 742 | zlog_debug (" family 0x%X type %d (MD5 authentication)", |
718e3744 | 743 | ntohs (md5->family), ntohs (md5->type)); |
5d6c3779 | 744 | zlog_debug (" RIP-2 packet len %d Key ID %d" |
ca5e516c | 745 | " Auth Data len %d", |
746 | ntohs (md5->packet_len), md5->keyid, | |
747 | md5->auth_len); | |
5d6c3779 | 748 | zlog_debug (" Sequence Number %ld", |
ca5e516c | 749 | (u_long) ntohl (md5->sequence)); |
718e3744 | 750 | } |
ca5e516c | 751 | else if (rte->tag == htons (RIP_AUTH_DATA)) |
718e3744 | 752 | { |
753 | p = (u_char *)&rte->prefix; | |
754 | ||
5d6c3779 | 755 | zlog_debug (" family 0x%X type %d (MD5 data)", |
718e3744 | 756 | ntohs (rte->family), ntohs (rte->tag)); |
5d6c3779 | 757 | zlog_debug (" MD5: %02X%02X%02X%02X%02X%02X%02X%02X" |
718e3744 | 758 | "%02X%02X%02X%02X%02X%02X%02X", |
ca5e516c | 759 | p[0], p[1], p[2], p[3], p[4], p[5], p[6], |
760 | p[7], p[9], p[10], p[11], p[12], p[13], | |
761 | p[14], p[15]); | |
718e3744 | 762 | } |
763 | else | |
764 | { | |
5d6c3779 | 765 | zlog_debug (" family 0x%X type %d (Unknown auth type)", |
718e3744 | 766 | ntohs (rte->family), ntohs (rte->tag)); |
767 | } | |
768 | } | |
769 | else | |
5d6c3779 | 770 | zlog_debug (" %s/%d -> %s family %d tag %d metric %ld", |
ca5e516c | 771 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
772 | netmask, inet_ntop (AF_INET, &rte->nexthop, nbuf, | |
773 | BUFSIZ), ntohs (rte->family), | |
774 | ntohs (rte->tag), (u_long) ntohl (rte->metric)); | |
718e3744 | 775 | } |
776 | else | |
777 | { | |
5d6c3779 | 778 | zlog_debug (" %s family %d tag %d metric %ld", |
718e3744 | 779 | inet_ntop (AF_INET, &rte->prefix, pbuf, BUFSIZ), |
780 | ntohs (rte->family), ntohs (rte->tag), | |
781 | (u_long)ntohl (rte->metric)); | |
782 | } | |
783 | } | |
784 | } | |
785 | ||
786 | /* Check if the destination address is valid (unicast; not net 0 | |
787 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
788 | check net 0 because we accept default route. */ | |
dc63bfd4 | 789 | static int |
718e3744 | 790 | rip_destination_check (struct in_addr addr) |
791 | { | |
792 | u_int32_t destination; | |
793 | ||
794 | /* Convert to host byte order. */ | |
795 | destination = ntohl (addr.s_addr); | |
796 | ||
797 | if (IPV4_NET127 (destination)) | |
798 | return 0; | |
799 | ||
800 | /* Net 0 may match to the default route. */ | |
801 | if (IPV4_NET0 (destination) && destination != 0) | |
802 | return 0; | |
803 | ||
804 | /* Unicast address must belong to class A, B, C. */ | |
805 | if (IN_CLASSA (destination)) | |
806 | return 1; | |
807 | if (IN_CLASSB (destination)) | |
808 | return 1; | |
809 | if (IN_CLASSC (destination)) | |
810 | return 1; | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | /* RIP version 2 authentication. */ | |
dc63bfd4 | 816 | static int |
718e3744 | 817 | rip_auth_simple_password (struct rte *rte, struct sockaddr_in *from, |
818 | struct interface *ifp) | |
819 | { | |
820 | struct rip_interface *ri; | |
821 | char *auth_str; | |
822 | ||
823 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 824 | zlog_debug ("RIPv2 simple password authentication from %s", |
718e3744 | 825 | inet_ntoa (from->sin_addr)); |
826 | ||
827 | ri = ifp->info; | |
828 | ||
829 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
ca5e516c | 830 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 831 | return 0; |
832 | ||
833 | /* Simple password authentication. */ | |
834 | if (ri->auth_str) | |
835 | { | |
836 | auth_str = (char *) &rte->prefix; | |
837 | ||
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 | ||
850 | key = key_match_for_accept (keychain, (char *) &rte->prefix); | |
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 pdigest[RIP_AUTH_MD5_SIZE]; |
869 | u_char digest[RIP_AUTH_MD5_SIZE]; | |
870 | u_int16_t packet_len; | |
871 | char *auth_str = NULL; | |
872 | ||
873 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 874 | zlog_debug ("RIPv2 MD5 authentication from %s", |
ca5e516c | 875 | inet_ntoa (from->sin_addr)); |
718e3744 | 876 | |
877 | ri = ifp->info; | |
878 | md5 = (struct rip_md5_info *) &packet->rte; | |
879 | ||
880 | /* Check auth type. */ | |
ca5e516c | 881 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) |
718e3744 | 882 | return 0; |
883 | ||
ca5e516c | 884 | /* If the authentication length is less than 16, then it must be wrong for |
885 | * any interpretation of rfc2082. Some implementations also interpret | |
886 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka RIP_AUTH_MD5_COMPAT_SIZE. | |
c2bfbcc3 | 887 | */ |
ca5e516c | 888 | if ( !((md5->auth_len == RIP_AUTH_MD5_SIZE) |
889 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) | |
c2bfbcc3 | 890 | { |
891 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 892 | zlog_debug ("RIPv2 MD5 authentication, strange authentication " |
ca5e516c | 893 | "length field %d", md5->auth_len); |
718e3744 | 894 | return 0; |
c2bfbcc3 | 895 | } |
718e3744 | 896 | |
ca5e516c | 897 | /* grab and verify check packet length */ |
898 | packet_len = ntohs (md5->packet_len); | |
899 | ||
900 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) | |
901 | { | |
902 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 903 | zlog_debug ("RIPv2 MD5 authentication, packet length field %d " |
ca5e516c | 904 | "greater than received length %d!", |
905 | md5->packet_len, length); | |
906 | return 0; | |
907 | } | |
908 | ||
909 | /* retrieve authentication data */ | |
910 | md5data = (struct rip_md5_data *) (((u_char *) packet) + packet_len); | |
911 | ||
718e3744 | 912 | if (ri->key_chain) |
913 | { | |
914 | keychain = keychain_lookup (ri->key_chain); | |
915 | if (keychain == NULL) | |
916 | return 0; | |
917 | ||
918 | key = key_lookup_for_accept (keychain, md5->keyid); | |
919 | if (key == NULL) | |
920 | return 0; | |
921 | ||
922 | auth_str = key->string; | |
923 | } | |
924 | ||
925 | if (ri->auth_str) | |
926 | auth_str = ri->auth_str; | |
927 | ||
928 | if (! auth_str) | |
929 | return 0; | |
930 | ||
931 | /* MD5 digest authentication. */ | |
718e3744 | 932 | |
933 | /* Save digest to pdigest. */ | |
934 | memcpy (pdigest, md5data->digest, RIP_AUTH_MD5_SIZE); | |
935 | ||
936 | /* Overwrite digest by my secret. */ | |
937 | memset (md5data->digest, 0, RIP_AUTH_MD5_SIZE); | |
11dde9c2 | 938 | strncpy ((char *)md5data->digest, auth_str, RIP_AUTH_MD5_SIZE); |
718e3744 | 939 | |
c1a03d47 | 940 | memset (&ctx, 0, sizeof(ctx)); |
941 | MD5Init(&ctx); | |
942 | MD5Update(&ctx, packet, packet_len + md5->auth_len); | |
943 | MD5Final(digest, &ctx); | |
718e3744 | 944 | |
945 | if (memcmp (pdigest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
946 | return packet_len; | |
947 | else | |
948 | return 0; | |
949 | } | |
950 | ||
b14ee00b | 951 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
952 | * (left justified and padded). | |
953 | * | |
954 | * presumes one of ri or key is valid, and that the auth strings they point | |
955 | * to are nul terminated. If neither are present, auth_str will be fully | |
956 | * zero padded. | |
957 | * | |
958 | */ | |
959 | static void | |
960 | rip_auth_prepare_str_send (struct rip_interface *ri, struct key *key, | |
961 | char *auth_str, int len) | |
718e3744 | 962 | { |
b14ee00b | 963 | assert (ri || key); |
718e3744 | 964 | |
b14ee00b | 965 | memset (auth_str, 0, len); |
966 | if (key && key->string) | |
967 | strncpy (auth_str, key->string, len); | |
968 | else if (ri->auth_str) | |
969 | strncpy (auth_str, ri->auth_str, len); | |
718e3744 | 970 | |
b14ee00b | 971 | return; |
972 | } | |
718e3744 | 973 | |
b14ee00b | 974 | /* Write RIPv2 simple password authentication information |
975 | * | |
976 | * auth_str is presumed to be 2 bytes and correctly prepared | |
977 | * (left justified and zero padded). | |
978 | */ | |
979 | static void | |
980 | rip_auth_simple_write (struct stream *s, char *auth_str, int len) | |
981 | { | |
982 | assert (s && len == RIP_AUTH_SIMPLE_SIZE); | |
983 | ||
984 | stream_putw (s, RIP_FAMILY_AUTH); | |
985 | stream_putw (s, RIP_AUTH_SIMPLE_PASSWORD); | |
986 | stream_put (s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
987 | ||
988 | return; | |
989 | } | |
718e3744 | 990 | |
b14ee00b | 991 | /* write RIPv2 MD5 "authentication header" |
992 | * (uses the auth key data field) | |
993 | * | |
994 | * Digest offset field is set to 0. | |
995 | * | |
996 | * returns: offset of the digest offset field, which must be set when | |
997 | * length to the auth-data MD5 digest is known. | |
998 | */ | |
999 | static size_t | |
1000 | rip_auth_md5_ah_write (struct stream *s, struct rip_interface *ri, | |
1001 | struct key *key) | |
1002 | { | |
1003 | size_t len = 0; | |
718e3744 | 1004 | |
b14ee00b | 1005 | assert (s && ri && ri->auth_type == RIP_AUTH_MD5); |
718e3744 | 1006 | |
1007 | /* MD5 authentication. */ | |
ca5e516c | 1008 | stream_putw (s, RIP_FAMILY_AUTH); |
718e3744 | 1009 | stream_putw (s, RIP_AUTH_MD5); |
1010 | ||
b14ee00b | 1011 | /* MD5 AH digest offset field. |
1012 | * | |
1013 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
1014 | * is known. Actual value is set in .....(). | |
1015 | */ | |
9985f83c | 1016 | len = stream_get_endp(s); |
b14ee00b | 1017 | stream_putw (s, 0); |
718e3744 | 1018 | |
1019 | /* Key ID. */ | |
1020 | if (key) | |
1021 | stream_putc (s, key->index % 256); | |
1022 | else | |
1023 | stream_putc (s, 1); | |
1024 | ||
ca5e516c | 1025 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds |
1026 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for this | |
1027 | * to be configurable. | |
1028 | */ | |
1029 | stream_putc (s, ri->md5_auth_len); | |
718e3744 | 1030 | |
1031 | /* Sequence Number (non-decreasing). */ | |
1032 | /* RFC2080: The value used in the sequence number is | |
1033 | arbitrary, but two suggestions are the time of the | |
1034 | message's creation or a simple message counter. */ | |
1035 | stream_putl (s, time (NULL)); | |
1036 | ||
1037 | /* Reserved field must be zero. */ | |
1038 | stream_putl (s, 0); | |
1039 | stream_putl (s, 0); | |
1040 | ||
b14ee00b | 1041 | return len; |
1042 | } | |
1043 | ||
1044 | /* If authentication is in used, write the appropriate header | |
1045 | * returns stream offset to which length must later be written | |
1046 | * or 0 if this is not required | |
1047 | */ | |
1048 | static size_t | |
1049 | rip_auth_header_write (struct stream *s, struct rip_interface *ri, | |
1050 | struct key *key, char *auth_str, int len) | |
1051 | { | |
1052 | assert (ri->auth_type != RIP_NO_AUTH); | |
1053 | ||
1054 | switch (ri->auth_type) | |
1055 | { | |
1056 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1057 | rip_auth_prepare_str_send (ri, key, auth_str, len); | |
1058 | rip_auth_simple_write (s, auth_str, len); | |
1059 | return 0; | |
1060 | case RIP_AUTH_MD5: | |
1061 | return rip_auth_md5_ah_write (s, ri, key); | |
1062 | } | |
1063 | assert (1); | |
1064 | } | |
1065 | ||
1066 | /* Write RIPv2 MD5 authentication data trailer */ | |
1067 | static void | |
1068 | rip_auth_md5_set (struct stream *s, struct rip_interface *ri, size_t doff, | |
1069 | char *auth_str, int authlen) | |
1070 | { | |
1071 | unsigned long len; | |
c1a03d47 | 1072 | MD5_CTX ctx; |
b14ee00b | 1073 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
718e3744 | 1074 | |
b14ee00b | 1075 | /* Make it sure this interface is configured as MD5 |
1076 | authentication. */ | |
1077 | assert ((ri->auth_type == RIP_AUTH_MD5) && (authlen == RIP_AUTH_MD5_SIZE)); | |
1078 | assert (doff > 0); | |
1079 | ||
1080 | /* Get packet length. */ | |
1081 | len = stream_get_endp(s); | |
1082 | ||
1083 | /* Check packet length. */ | |
1084 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) | |
1085 | { | |
1086 | zlog_err ("rip_auth_md5_set(): packet length %ld is less than minimum length.", len); | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | /* Set the digest offset length in the header */ | |
1091 | stream_putw_at (s, doff, len); | |
1092 | ||
718e3744 | 1093 | /* Set authentication data. */ |
ca5e516c | 1094 | stream_putw (s, RIP_FAMILY_AUTH); |
1095 | stream_putw (s, RIP_AUTH_DATA); | |
718e3744 | 1096 | |
1097 | /* Generate a digest for the RIP packet. */ | |
c1a03d47 | 1098 | memset(&ctx, 0, sizeof(ctx)); |
1099 | MD5Init(&ctx); | |
1100 | MD5Update(&ctx, s->data, s->endp); | |
1101 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1102 | MD5Final(digest, &ctx); | |
718e3744 | 1103 | |
1104 | /* Copy the digest to the packet. */ | |
1105 | stream_write (s, digest, RIP_AUTH_MD5_SIZE); | |
1106 | } | |
1107 | ||
1108 | /* RIP routing information. */ | |
dc63bfd4 | 1109 | static void |
718e3744 | 1110 | rip_response_process (struct rip_packet *packet, int size, |
c49ad8f1 | 1111 | struct sockaddr_in *from, struct connected *ifc) |
718e3744 | 1112 | { |
1113 | caddr_t lim; | |
1114 | struct rte *rte; | |
727d104b | 1115 | struct prefix_ipv4 ifaddr; |
1116 | struct prefix_ipv4 ifaddrclass; | |
727d104b | 1117 | int subnetted; |
718e3744 | 1118 | |
727d104b | 1119 | /* We don't know yet. */ |
1120 | subnetted = -1; | |
1121 | ||
718e3744 | 1122 | /* The Response must be ignored if it is not from the RIP |
1123 | port. (RFC2453 - Sec. 3.9.2)*/ | |
ca5e516c | 1124 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) |
718e3744 | 1125 | { |
1126 | zlog_info ("response doesn't come from RIP port: %d", | |
1127 | from->sin_port); | |
1128 | rip_peer_bad_packet (from); | |
1129 | return; | |
1130 | } | |
1131 | ||
1132 | /* The datagram's IPv4 source address should be checked to see | |
1133 | whether the datagram is from a valid neighbor; the source of the | |
35a60c2d | 1134 | datagram must be on a directly connected network (RFC2453 - Sec. 3.9.2) */ |
1135 | if (if_lookup_address(from->sin_addr) == NULL) | |
718e3744 | 1136 | { |
1137 | zlog_info ("This datagram doesn't came from a valid neighbor: %s", | |
1138 | inet_ntoa (from->sin_addr)); | |
1139 | rip_peer_bad_packet (from); | |
1140 | return; | |
1141 | } | |
1142 | ||
1143 | /* It is also worth checking to see whether the response is from one | |
1144 | of the router's own addresses. */ | |
1145 | ||
1146 | ; /* Alredy done in rip_read () */ | |
1147 | ||
1148 | /* Update RIP peer. */ | |
1149 | rip_peer_update (from, packet->version); | |
1150 | ||
1151 | /* Set RTE pointer. */ | |
1152 | rte = packet->rte; | |
1153 | ||
1154 | for (lim = (caddr_t) packet + size; (caddr_t) rte < lim; rte++) | |
1155 | { | |
1156 | /* RIPv2 authentication check. */ | |
1157 | /* If the Address Family Identifier of the first (and only the | |
1158 | first) entry in the message is 0xFFFF, then the remainder of | |
1159 | the entry contains the authentication. */ | |
1160 | /* If the packet gets here it means authentication enabled */ | |
1161 | /* Check is done in rip_read(). So, just skipping it */ | |
1162 | if (packet->version == RIPv2 && | |
1163 | rte == packet->rte && | |
ca5e516c | 1164 | rte->family == htons(RIP_FAMILY_AUTH)) |
718e3744 | 1165 | continue; |
1166 | ||
ca5e516c | 1167 | if (rte->family != htons(AF_INET)) |
718e3744 | 1168 | { |
1169 | /* Address family check. RIP only supports AF_INET. */ | |
1170 | zlog_info ("Unsupported family %d from %s.", | |
1171 | ntohs (rte->family), inet_ntoa (from->sin_addr)); | |
1172 | continue; | |
1173 | } | |
1174 | ||
1175 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1176 | or 127) */ | |
1177 | if (! rip_destination_check (rte->prefix)) | |
1178 | { | |
1179 | zlog_info ("Network is net 0 or net 127 or it is not unicast network"); | |
1180 | rip_peer_bad_route (from); | |
1181 | continue; | |
1182 | } | |
1183 | ||
1184 | /* Convert metric value to host byte order. */ | |
1185 | rte->metric = ntohl (rte->metric); | |
1186 | ||
1187 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ | |
1188 | if (! (rte->metric >= 1 && rte->metric <= 16)) | |
1189 | { | |
1190 | zlog_info ("Route's metric is not in the 1-16 range."); | |
1191 | rip_peer_bad_route (from); | |
1192 | continue; | |
1193 | } | |
1194 | ||
1195 | /* RIPv1 does not have nexthop value. */ | |
1196 | if (packet->version == RIPv1 && rte->nexthop.s_addr != 0) | |
1197 | { | |
1198 | zlog_info ("RIPv1 packet with nexthop value %s", | |
1199 | inet_ntoa (rte->nexthop)); | |
1200 | rip_peer_bad_route (from); | |
1201 | continue; | |
1202 | } | |
1203 | ||
1204 | /* That is, if the provided information is ignored, a possibly | |
1205 | sub-optimal, but absolutely valid, route may be taken. If | |
1206 | the received Next Hop is not directly reachable, it should be | |
1207 | treated as 0.0.0.0. */ | |
1208 | if (packet->version == RIPv2 && rte->nexthop.s_addr != 0) | |
1209 | { | |
1210 | u_int32_t addrval; | |
1211 | ||
1212 | /* Multicast address check. */ | |
1213 | addrval = ntohl (rte->nexthop.s_addr); | |
1214 | if (IN_CLASSD (addrval)) | |
1215 | { | |
1216 | zlog_info ("Nexthop %s is multicast address, skip this rte", | |
1217 | inet_ntoa (rte->nexthop)); | |
1218 | continue; | |
1219 | } | |
1220 | ||
1221 | if (! if_lookup_address (rte->nexthop)) | |
1222 | { | |
1223 | struct route_node *rn; | |
1224 | struct rip_info *rinfo; | |
1225 | ||
1226 | rn = route_node_match_ipv4 (rip->table, &rte->nexthop); | |
1227 | ||
1228 | if (rn) | |
1229 | { | |
1230 | rinfo = rn->info; | |
1231 | ||
1232 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1233 | && rinfo->sub_type == RIP_ROUTE_RTE) | |
1234 | { | |
1235 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1236 | zlog_debug ("Next hop %s is on RIP network. Set nexthop to the packet's originator", inet_ntoa (rte->nexthop)); |
718e3744 | 1237 | rte->nexthop = rinfo->from; |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1242 | zlog_debug ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
718e3744 | 1243 | rte->nexthop.s_addr = 0; |
1244 | } | |
1245 | ||
1246 | route_unlock_node (rn); | |
1247 | } | |
1248 | else | |
1249 | { | |
1250 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1251 | zlog_debug ("Next hop %s is not directly reachable. Treat it as 0.0.0.0", inet_ntoa (rte->nexthop)); |
718e3744 | 1252 | rte->nexthop.s_addr = 0; |
1253 | } | |
1254 | ||
1255 | } | |
1256 | } | |
1257 | ||
1258 | /* For RIPv1, there won't be a valid netmask. | |
1259 | ||
1260 | This is a best guess at the masks. If everyone was using old | |
1261 | Ciscos before the 'ip subnet zero' option, it would be almost | |
1262 | right too :-) | |
1263 | ||
1264 | Cisco summarize ripv1 advertisments to the classful boundary | |
1265 | (/16 for class B's) except when the RIP packet does to inside | |
1266 | the classful network in question. */ | |
1267 | ||
1268 | if ((packet->version == RIPv1 && rte->prefix.s_addr != 0) | |
1269 | || (packet->version == RIPv2 | |
1270 | && (rte->prefix.s_addr != 0 && rte->mask.s_addr == 0))) | |
1271 | { | |
1272 | u_int32_t destination; | |
1273 | ||
727d104b | 1274 | if (subnetted == -1) |
c49ad8f1 | 1275 | { |
1276 | memcpy (&ifaddr, ifc->address, sizeof (struct prefix_ipv4)); | |
1277 | memcpy (&ifaddrclass, &ifaddr, sizeof (struct prefix_ipv4)); | |
1278 | apply_classful_mask_ipv4 (&ifaddrclass); | |
1279 | subnetted = 0; | |
1280 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1281 | subnetted = 1; | |
1282 | } | |
727d104b | 1283 | |
1284 | destination = ntohl (rte->prefix.s_addr); | |
1285 | ||
1286 | if (IN_CLASSA (destination)) | |
1287 | masklen2ip (8, &rte->mask); | |
1288 | else if (IN_CLASSB (destination)) | |
1289 | masklen2ip (16, &rte->mask); | |
1290 | else if (IN_CLASSC (destination)) | |
718e3744 | 1291 | masklen2ip (24, &rte->mask); |
727d104b | 1292 | |
1293 | if (subnetted == 1) | |
1294 | masklen2ip (ifaddrclass.prefixlen, | |
1295 | (struct in_addr *) &destination); | |
1296 | if ((subnetted == 1) && ((rte->prefix.s_addr & destination) == | |
1297 | ifaddrclass.prefix.s_addr)) | |
1298 | { | |
1299 | masklen2ip (ifaddr.prefixlen, &rte->mask); | |
1300 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) | |
1301 | masklen2ip (32, &rte->mask); | |
1302 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1303 | zlog_debug ("Subnetted route %s", inet_ntoa (rte->prefix)); |
718e3744 | 1304 | } |
727d104b | 1305 | else |
718e3744 | 1306 | { |
727d104b | 1307 | if ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr) |
1308 | continue; | |
718e3744 | 1309 | } |
727d104b | 1310 | |
1311 | if (IS_RIP_DEBUG_EVENT) | |
718e3744 | 1312 | { |
5d6c3779 | 1313 | zlog_debug ("Resultant route %s", inet_ntoa (rte->prefix)); |
1314 | zlog_debug ("Resultant mask %s", inet_ntoa (rte->mask)); | |
718e3744 | 1315 | } |
1316 | } | |
1317 | ||
1318 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1319 | ignore the entry. */ | |
1320 | if ((packet->version == RIPv2) | |
1321 | && (rte->mask.s_addr != 0) | |
1322 | && ((rte->prefix.s_addr & rte->mask.s_addr) != rte->prefix.s_addr)) | |
1323 | { | |
1324 | zlog_warn ("RIPv2 address %s is not mask /%d applied one", | |
1325 | inet_ntoa (rte->prefix), ip_masklen (rte->mask)); | |
1326 | rip_peer_bad_route (from); | |
1327 | continue; | |
1328 | } | |
1329 | ||
1330 | /* Default route's netmask is ignored. */ | |
1331 | if (packet->version == RIPv2 | |
1332 | && (rte->prefix.s_addr == 0) | |
1333 | && (rte->mask.s_addr != 0)) | |
1334 | { | |
1335 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1336 | zlog_debug ("Default route with non-zero netmask. Set zero to netmask"); |
718e3744 | 1337 | rte->mask.s_addr = 0; |
1338 | } | |
1339 | ||
1340 | /* Routing table updates. */ | |
c49ad8f1 | 1341 | rip_rte_process (rte, from, ifc->ifp); |
718e3744 | 1342 | } |
1343 | } | |
1344 | ||
a4e987e0 | 1345 | /* Make socket for RIP protocol. */ |
f69bd9da | 1346 | static int |
2c61ae37 | 1347 | rip_create_socket (struct sockaddr_in *from) |
a4e987e0 | 1348 | { |
1349 | int ret; | |
1350 | int sock; | |
1351 | struct sockaddr_in addr; | |
f69bd9da | 1352 | |
2c61ae37 | 1353 | memset (&addr, 0, sizeof (struct sockaddr_in)); |
1354 | ||
1355 | if (!from) | |
f69bd9da | 1356 | { |
f69bd9da | 1357 | addr.sin_family = AF_INET; |
1358 | addr.sin_addr.s_addr = INADDR_ANY; | |
2c61ae37 | 1359 | #ifdef HAVE_SINLEN |
1360 | addr.sin_len = sizeof (struct sockaddr_in); | |
1361 | #endif /* HAVE_SINLEN */ | |
38d3c163 | 1362 | } else { |
1363 | memcpy(&addr, from, sizeof(addr)); | |
f69bd9da | 1364 | } |
1365 | ||
2c61ae37 | 1366 | /* sending port must always be the RIP port */ |
1367 | addr.sin_port = htons (RIP_PORT_DEFAULT); | |
1368 | ||
a4e987e0 | 1369 | /* Make datagram socket. */ |
1370 | sock = socket (AF_INET, SOCK_DGRAM, 0); | |
1371 | if (sock < 0) | |
1372 | { | |
1373 | zlog_err("Cannot create UDP socket: %s", safe_strerror(errno)); | |
1374 | exit (1); | |
1375 | } | |
1376 | ||
1377 | sockopt_broadcast (sock); | |
1378 | sockopt_reuseaddr (sock); | |
1379 | sockopt_reuseport (sock); | |
a4e987e0 | 1380 | #ifdef RIP_RECVMSG |
1381 | setsockopt_pktinfo (sock); | |
1382 | #endif /* RIP_RECVMSG */ | |
1383 | ||
1384 | if (ripd_privs.change (ZPRIVS_RAISE)) | |
1385 | zlog_err ("rip_create_socket: could not raise privs"); | |
f69bd9da | 1386 | setsockopt_so_recvbuf (sock, RIP_UDP_RCV_BUF); |
1387 | if ( (ret = bind (sock, (struct sockaddr *) & addr, sizeof (addr))) < 0) | |
1388 | ||
a4e987e0 | 1389 | { |
1390 | int save_errno = errno; | |
1391 | if (ripd_privs.change (ZPRIVS_LOWER)) | |
1392 | zlog_err ("rip_create_socket: could not lower privs"); | |
2c61ae37 | 1393 | |
1394 | zlog_err("%s: Can't bind socket %d to %s port %d: %s", __func__, | |
1395 | sock, inet_ntoa(addr.sin_addr), | |
1396 | (int) ntohs(addr.sin_port), | |
1397 | safe_strerror(save_errno)); | |
1398 | ||
f69bd9da | 1399 | close (sock); |
a4e987e0 | 1400 | return ret; |
1401 | } | |
f69bd9da | 1402 | |
a4e987e0 | 1403 | if (ripd_privs.change (ZPRIVS_LOWER)) |
1404 | zlog_err ("rip_create_socket: could not lower privs"); | |
1405 | ||
1406 | return sock; | |
1407 | } | |
1408 | ||
c49ad8f1 | 1409 | /* RIP packet send to destination address, on interface denoted by |
1410 | * by connected argument. NULL to argument denotes destination should be | |
1411 | * should be RIP multicast group | |
1412 | */ | |
dc63bfd4 | 1413 | static int |
c49ad8f1 | 1414 | rip_send_packet (u_char * buf, int size, struct sockaddr_in *to, |
1415 | struct connected *ifc) | |
718e3744 | 1416 | { |
931cd54d | 1417 | int ret, send_sock; |
718e3744 | 1418 | struct sockaddr_in sin; |
c49ad8f1 | 1419 | |
1420 | assert (ifc != NULL); | |
1421 | ||
931cd54d | 1422 | if (IS_RIP_DEBUG_PACKET) |
1423 | { | |
f69bd9da | 1424 | #define ADDRESS_SIZE 20 |
1425 | char dst[ADDRESS_SIZE]; | |
1426 | dst[ADDRESS_SIZE - 1] = '\0'; | |
1427 | ||
931cd54d | 1428 | if (to) |
1429 | { | |
f69bd9da | 1430 | strncpy (dst, inet_ntoa(to->sin_addr), ADDRESS_SIZE - 1); |
931cd54d | 1431 | } |
1432 | else | |
1433 | { | |
1434 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); | |
f69bd9da | 1435 | strncpy (dst, inet_ntoa(sin.sin_addr), ADDRESS_SIZE - 1); |
931cd54d | 1436 | } |
f69bd9da | 1437 | #undef ADDRESS_SIZE |
5d6c3779 | 1438 | zlog_debug("rip_send_packet %s > %s (%s)", |
c49ad8f1 | 1439 | inet_ntoa(ifc->address->u.prefix4), |
1440 | dst, ifc->ifp->name); | |
931cd54d | 1441 | } |
f69bd9da | 1442 | |
c49ad8f1 | 1443 | if ( CHECK_FLAG (ifc->flags, ZEBRA_IFA_SECONDARY) ) |
931cd54d | 1444 | { |
1445 | /* | |
1446 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is configured | |
1447 | * with multiple addresses on the same subnet: the first address | |
1448 | * on the subnet is configured "primary", and all subsequent addresses | |
1449 | * on that subnet are treated as "secondary" addresses. | |
1450 | * In order to avoid routing-table bloat on other rip listeners, | |
1451 | * we do not send out RIP packets with ZEBRA_IFA_SECONDARY source addrs. | |
1452 | * XXX Since Linux is the only system for which the ZEBRA_IFA_SECONDARY | |
1453 | * flag is set, we would end up sending a packet for a "secondary" | |
1454 | * source address on non-linux systems. | |
1455 | */ | |
1456 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1457 | zlog_debug("duplicate dropped"); |
931cd54d | 1458 | return 0; |
1459 | } | |
1460 | ||
718e3744 | 1461 | /* Make destination address. */ |
1462 | memset (&sin, 0, sizeof (struct sockaddr_in)); | |
1463 | sin.sin_family = AF_INET; | |
1464 | #ifdef HAVE_SIN_LEN | |
1465 | sin.sin_len = sizeof (struct sockaddr_in); | |
1466 | #endif /* HAVE_SIN_LEN */ | |
1467 | ||
1468 | /* When destination is specified, use it's port and address. */ | |
1469 | if (to) | |
1470 | { | |
718e3744 | 1471 | sin.sin_port = to->sin_port; |
1472 | sin.sin_addr = to->sin_addr; | |
931cd54d | 1473 | send_sock = rip->sock; |
718e3744 | 1474 | } |
1475 | else | |
1476 | { | |
2c61ae37 | 1477 | struct sockaddr_in from; |
1478 | ||
718e3744 | 1479 | sin.sin_port = htons (RIP_PORT_DEFAULT); |
1480 | sin.sin_addr.s_addr = htonl (INADDR_RIP_GROUP); | |
2c61ae37 | 1481 | |
1482 | /* multicast send should bind to local interface address */ | |
1483 | from.sin_family = AF_INET; | |
1484 | from.sin_port = htons (RIP_PORT_DEFAULT); | |
1485 | from.sin_addr = ifc->address->u.prefix4; | |
1486 | #ifdef HAVE_SIN_LEN | |
1487 | from.sin_len = sizeof (struct sockaddr_in); | |
1488 | #endif /* HAVE_SIN_LEN */ | |
1489 | ||
931cd54d | 1490 | /* |
1491 | * we have to open a new socket for each packet because this | |
1492 | * is the most portable way to bind to a different source | |
1493 | * ipv4 address for each packet. | |
1494 | */ | |
2c61ae37 | 1495 | if ( (send_sock = rip_create_socket (&from)) < 0) |
931cd54d | 1496 | { |
f69bd9da | 1497 | zlog_warn("rip_send_packet could not create socket."); |
931cd54d | 1498 | return -1; |
f69bd9da | 1499 | } |
c49ad8f1 | 1500 | rip_interface_multicast_set (send_sock, ifc); |
718e3744 | 1501 | } |
1502 | ||
931cd54d | 1503 | ret = sendto (send_sock, buf, size, 0, (struct sockaddr *)&sin, |
718e3744 | 1504 | sizeof (struct sockaddr_in)); |
1505 | ||
1506 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1507 | zlog_debug ("SEND to %s.%d", inet_ntoa(sin.sin_addr), |
cc1131ab | 1508 | ntohs (sin.sin_port)); |
718e3744 | 1509 | |
1510 | if (ret < 0) | |
6099b3b5 | 1511 | zlog_warn ("can't send packet : %s", safe_strerror (errno)); |
718e3744 | 1512 | |
931cd54d | 1513 | if (!to) |
1514 | close(send_sock); | |
1515 | ||
718e3744 | 1516 | return ret; |
1517 | } | |
1518 | ||
1519 | /* Add redistributed route to RIP table. */ | |
1520 | void | |
1521 | rip_redistribute_add (int type, int sub_type, struct prefix_ipv4 *p, | |
fbf5d033 | 1522 | unsigned int ifindex, struct in_addr *nexthop, |
1523 | unsigned int metric, unsigned char distance) | |
718e3744 | 1524 | { |
1525 | int ret; | |
1526 | struct route_node *rp; | |
1527 | struct rip_info *rinfo; | |
1528 | ||
1529 | /* Redistribute route */ | |
1530 | ret = rip_destination_check (p->prefix); | |
1531 | if (! ret) | |
1532 | return; | |
1533 | ||
1534 | rp = route_node_get (rip->table, (struct prefix *) p); | |
1535 | ||
1536 | rinfo = rp->info; | |
1537 | ||
1538 | if (rinfo) | |
1539 | { | |
1540 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
1541 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1542 | && rinfo->metric != RIP_METRIC_INFINITY) | |
1543 | { | |
1544 | route_unlock_node (rp); | |
1545 | return; | |
1546 | } | |
1547 | ||
1548 | /* Manually configured RIP route check. */ | |
1549 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
16705130 | 1550 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) || |
1551 | (rinfo->sub_type == RIP_ROUTE_DEFAULT)) ) | |
718e3744 | 1552 | { |
16705130 | 1553 | if (type != ZEBRA_ROUTE_RIP || ((sub_type != RIP_ROUTE_STATIC) && |
1554 | (sub_type != RIP_ROUTE_DEFAULT))) | |
718e3744 | 1555 | { |
1556 | route_unlock_node (rp); | |
1557 | return; | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | RIP_TIMER_OFF (rinfo->t_timeout); | |
1562 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
1563 | ||
1564 | if (rip_route_rte (rinfo)) | |
1565 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rp->p, &rinfo->nexthop, | |
1566 | rinfo->metric); | |
1567 | rp->info = NULL; | |
1568 | rip_info_free (rinfo); | |
1569 | ||
1570 | route_unlock_node (rp); | |
1571 | } | |
1572 | ||
1573 | rinfo = rip_info_new (); | |
1574 | ||
1575 | rinfo->type = type; | |
1576 | rinfo->sub_type = sub_type; | |
1577 | rinfo->ifindex = ifindex; | |
1578 | rinfo->metric = 1; | |
fbf5d033 | 1579 | rinfo->external_metric = metric; |
1580 | rinfo->distance = distance; | |
718e3744 | 1581 | rinfo->rp = rp; |
1582 | ||
1583 | if (nexthop) | |
1584 | rinfo->nexthop = *nexthop; | |
1585 | ||
1586 | rinfo->flags |= RIP_RTF_FIB; | |
1587 | rp->info = rinfo; | |
1588 | ||
1589 | rinfo->flags |= RIP_RTF_CHANGED; | |
1590 | ||
16705130 | 1591 | if (IS_RIP_DEBUG_EVENT) { |
1592 | if (!nexthop) | |
5d6c3779 | 1593 | zlog_debug ("Redistribute new prefix %s/%d on the interface %s", |
16705130 | 1594 | inet_ntoa(p->prefix), p->prefixlen, |
1595 | ifindex2ifname(ifindex)); | |
1596 | else | |
5d6c3779 | 1597 | zlog_debug ("Redistribute new prefix %s/%d with nexthop %s on the interface %s", |
16705130 | 1598 | inet_ntoa(p->prefix), p->prefixlen, inet_ntoa(rinfo->nexthop), |
1599 | ifindex2ifname(ifindex)); | |
1600 | } | |
1601 | ||
1602 | ||
718e3744 | 1603 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
1604 | } | |
1605 | ||
1606 | /* Delete redistributed route from RIP table. */ | |
1607 | void | |
1608 | rip_redistribute_delete (int type, int sub_type, struct prefix_ipv4 *p, | |
1609 | unsigned int ifindex) | |
1610 | { | |
1611 | int ret; | |
1612 | struct route_node *rp; | |
1613 | struct rip_info *rinfo; | |
1614 | ||
1615 | ret = rip_destination_check (p->prefix); | |
1616 | if (! ret) | |
1617 | return; | |
1618 | ||
1619 | rp = route_node_lookup (rip->table, (struct prefix *) p); | |
1620 | if (rp) | |
1621 | { | |
1622 | rinfo = rp->info; | |
1623 | ||
1624 | if (rinfo != NULL | |
1625 | && rinfo->type == type | |
1626 | && rinfo->sub_type == sub_type | |
1627 | && rinfo->ifindex == ifindex) | |
1628 | { | |
1629 | /* Perform poisoned reverse. */ | |
1630 | rinfo->metric = RIP_METRIC_INFINITY; | |
1631 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
1632 | rip_garbage_collect, rip->garbage_time); | |
1633 | RIP_TIMER_OFF (rinfo->t_timeout); | |
1634 | rinfo->flags |= RIP_RTF_CHANGED; | |
1635 | ||
16705130 | 1636 | if (IS_RIP_DEBUG_EVENT) |
5d6c3779 | 1637 | zlog_debug ("Poisone %s/%d on the interface %s with an infinity metric [delete]", |
16705130 | 1638 | inet_ntoa(p->prefix), p->prefixlen, |
1639 | ifindex2ifname(ifindex)); | |
1640 | ||
718e3744 | 1641 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
1642 | } | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /* Response to request called from rip_read ().*/ | |
dc63bfd4 | 1647 | static void |
718e3744 | 1648 | rip_request_process (struct rip_packet *packet, int size, |
c49ad8f1 | 1649 | struct sockaddr_in *from, struct connected *ifc) |
718e3744 | 1650 | { |
1651 | caddr_t lim; | |
1652 | struct rte *rte; | |
1653 | struct prefix_ipv4 p; | |
1654 | struct route_node *rp; | |
1655 | struct rip_info *rinfo; | |
1656 | struct rip_interface *ri; | |
1657 | ||
16705130 | 1658 | /* Does not reponse to the requests on the loopback interfaces */ |
c49ad8f1 | 1659 | if (if_is_loopback (ifc->ifp)) |
16705130 | 1660 | return; |
1661 | ||
429a0f8c | 1662 | /* Check RIP process is enabled on this interface. */ |
c49ad8f1 | 1663 | ri = ifc->ifp->info; |
16705130 | 1664 | if (! ri->running) |
1665 | return; | |
718e3744 | 1666 | |
1667 | /* When passive interface is specified, suppress responses */ | |
1668 | if (ri->passive) | |
1669 | return; | |
c49ad8f1 | 1670 | |
718e3744 | 1671 | /* RIP peer update. */ |
1672 | rip_peer_update (from, packet->version); | |
1673 | ||
1674 | lim = ((caddr_t) packet) + size; | |
1675 | rte = packet->rte; | |
1676 | ||
1677 | /* The Request is processed entry by entry. If there are no | |
1678 | entries, no response is given. */ | |
1679 | if (lim == (caddr_t) rte) | |
1680 | return; | |
1681 | ||
1682 | /* There is one special case. If there is exactly one entry in the | |
1683 | request, and it has an address family identifier of zero and a | |
1684 | metric of infinity (i.e., 16), then this is a request to send the | |
1685 | entire routing table. */ | |
1686 | if (lim == ((caddr_t) (rte + 1)) && | |
1687 | ntohs (rte->family) == 0 && | |
1688 | ntohl (rte->metric) == RIP_METRIC_INFINITY) | |
1689 | { | |
cc1131ab | 1690 | struct prefix_ipv4 saddr; |
1691 | ||
1692 | /* saddr will be used for determining which routes to split-horizon. | |
1693 | Since the source address we'll pick will be on the same subnet as the | |
1694 | destination, for the purpose of split-horizoning, we'll | |
1695 | pretend that "from" is our source address. */ | |
1696 | saddr.family = AF_INET; | |
1697 | saddr.prefixlen = IPV4_MAX_BITLEN; | |
1698 | saddr.prefix = from->sin_addr; | |
1699 | ||
718e3744 | 1700 | /* All route with split horizon */ |
c49ad8f1 | 1701 | rip_output_process (ifc, from, rip_all_route, packet->version); |
718e3744 | 1702 | } |
1703 | else | |
1704 | { | |
1705 | /* Examine the list of RTEs in the Request one by one. For each | |
1706 | entry, look up the destination in the router's routing | |
1707 | database and, if there is a route, put that route's metric in | |
1708 | the metric field of the RTE. If there is no explicit route | |
1709 | to the specified destination, put infinity in the metric | |
1710 | field. Once all the entries have been filled in, change the | |
1711 | command from Request to Response and send the datagram back | |
1712 | to the requestor. */ | |
1713 | p.family = AF_INET; | |
1714 | ||
1715 | for (; ((caddr_t) rte) < lim; rte++) | |
1716 | { | |
1717 | p.prefix = rte->prefix; | |
1718 | p.prefixlen = ip_masklen (rte->mask); | |
1719 | apply_mask_ipv4 (&p); | |
1720 | ||
1721 | rp = route_node_lookup (rip->table, (struct prefix *) &p); | |
1722 | if (rp) | |
1723 | { | |
1724 | rinfo = rp->info; | |
1725 | rte->metric = htonl (rinfo->metric); | |
1726 | route_unlock_node (rp); | |
1727 | } | |
1728 | else | |
1729 | rte->metric = htonl (RIP_METRIC_INFINITY); | |
1730 | } | |
1731 | packet->command = RIP_RESPONSE; | |
1732 | ||
c49ad8f1 | 1733 | rip_send_packet ((u_char *)packet, size, from, ifc); |
718e3744 | 1734 | } |
1735 | rip_global_queries++; | |
1736 | } | |
1737 | ||
1738 | #if RIP_RECVMSG | |
1739 | /* Set IPv6 packet info to the socket. */ | |
1740 | static int | |
1741 | setsockopt_pktinfo (int sock) | |
1742 | { | |
1743 | int ret; | |
1744 | int val = 1; | |
1745 | ||
1746 | ret = setsockopt(sock, IPPROTO_IP, IP_PKTINFO, &val, sizeof(val)); | |
1747 | if (ret < 0) | |
6099b3b5 | 1748 | zlog_warn ("Can't setsockopt IP_PKTINFO : %s", safe_strerror (errno)); |
718e3744 | 1749 | return ret; |
1750 | } | |
1751 | ||
1752 | /* Read RIP packet by recvmsg function. */ | |
1753 | int | |
1754 | rip_recvmsg (int sock, u_char *buf, int size, struct sockaddr_in *from, | |
1755 | int *ifindex) | |
1756 | { | |
1757 | int ret; | |
1758 | struct msghdr msg; | |
1759 | struct iovec iov; | |
1760 | struct cmsghdr *ptr; | |
1761 | char adata[1024]; | |
1762 | ||
1763 | msg.msg_name = (void *) from; | |
1764 | msg.msg_namelen = sizeof (struct sockaddr_in); | |
1765 | msg.msg_iov = &iov; | |
1766 | msg.msg_iovlen = 1; | |
1767 | msg.msg_control = (void *) adata; | |
1768 | msg.msg_controllen = sizeof adata; | |
1769 | iov.iov_base = buf; | |
1770 | iov.iov_len = size; | |
1771 | ||
1772 | ret = recvmsg (sock, &msg, 0); | |
1773 | if (ret < 0) | |
1774 | return ret; | |
1775 | ||
b99760ab | 1776 | for (ptr = ZCMSG_FIRSTHDR(&msg); ptr != NULL; ptr = CMSG_NXTHDR(&msg, ptr)) |
718e3744 | 1777 | if (ptr->cmsg_level == IPPROTO_IP && ptr->cmsg_type == IP_PKTINFO) |
1778 | { | |
1779 | struct in_pktinfo *pktinfo; | |
1780 | int i; | |
1781 | ||
1782 | pktinfo = (struct in_pktinfo *) CMSG_DATA (ptr); | |
1783 | i = pktinfo->ipi_ifindex; | |
1784 | } | |
1785 | return ret; | |
1786 | } | |
1787 | ||
1788 | /* RIP packet read function. */ | |
1789 | int | |
1790 | rip_read_new (struct thread *t) | |
1791 | { | |
1792 | int ret; | |
1793 | int sock; | |
1794 | char buf[RIP_PACKET_MAXSIZ]; | |
1795 | struct sockaddr_in from; | |
1796 | unsigned int ifindex; | |
1797 | ||
1798 | /* Fetch socket then register myself. */ | |
1799 | sock = THREAD_FD (t); | |
1800 | rip_event (RIP_READ, sock); | |
1801 | ||
1802 | /* Read RIP packet. */ | |
1803 | ret = rip_recvmsg (sock, buf, RIP_PACKET_MAXSIZ, &from, (int *)&ifindex); | |
1804 | if (ret < 0) | |
1805 | { | |
6099b3b5 | 1806 | zlog_warn ("Can't read RIP packet: %s", safe_strerror (errno)); |
718e3744 | 1807 | return ret; |
1808 | } | |
1809 | ||
1810 | return ret; | |
1811 | } | |
1812 | #endif /* RIP_RECVMSG */ | |
1813 | ||
1814 | /* First entry point of RIP packet. */ | |
dc63bfd4 | 1815 | static int |
718e3744 | 1816 | rip_read (struct thread *t) |
1817 | { | |
1818 | int sock; | |
1819 | int ret; | |
1820 | int rtenum; | |
1821 | union rip_buf rip_buf; | |
1822 | struct rip_packet *packet; | |
1823 | struct sockaddr_in from; | |
11dde9c2 | 1824 | int len; |
1825 | socklen_t fromlen; | |
718e3744 | 1826 | struct interface *ifp; |
c49ad8f1 | 1827 | struct connected *ifc; |
718e3744 | 1828 | struct rip_interface *ri; |
1829 | ||
1830 | /* Fetch socket then register myself. */ | |
1831 | sock = THREAD_FD (t); | |
1832 | rip->t_read = NULL; | |
1833 | ||
1834 | /* Add myself to tne next event */ | |
1835 | rip_event (RIP_READ, sock); | |
1836 | ||
1837 | /* RIPd manages only IPv4. */ | |
1838 | memset (&from, 0, sizeof (struct sockaddr_in)); | |
1839 | fromlen = sizeof (struct sockaddr_in); | |
1840 | ||
1841 | len = recvfrom (sock, (char *)&rip_buf.buf, sizeof (rip_buf.buf), 0, | |
1842 | (struct sockaddr *) &from, &fromlen); | |
1843 | if (len < 0) | |
1844 | { | |
6099b3b5 | 1845 | zlog_info ("recvfrom failed: %s", safe_strerror (errno)); |
718e3744 | 1846 | return len; |
1847 | } | |
1848 | ||
1849 | /* Check is this packet comming from myself? */ | |
31a476c7 | 1850 | if (if_check_address (from.sin_addr)) |
718e3744 | 1851 | { |
1852 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1853 | zlog_debug ("ignore packet comes from myself"); |
718e3744 | 1854 | return -1; |
1855 | } | |
1856 | ||
1857 | /* Which interface is this packet comes from. */ | |
1858 | ifp = if_lookup_address (from.sin_addr); | |
c49ad8f1 | 1859 | |
718e3744 | 1860 | /* RIP packet received */ |
1861 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1862 | zlog_debug ("RECV packet from %s port %d on %s", |
718e3744 | 1863 | inet_ntoa (from.sin_addr), ntohs (from.sin_port), |
1864 | ifp ? ifp->name : "unknown"); | |
1865 | ||
1866 | /* If this packet come from unknown interface, ignore it. */ | |
1867 | if (ifp == NULL) | |
1868 | { | |
766a0ca3 | 1869 | zlog_info ("rip_read: cannot find interface for packet from %s port %d", |
1870 | inet_ntoa(from.sin_addr), ntohs (from.sin_port)); | |
c49ad8f1 | 1871 | return -1; |
1872 | } | |
1873 | ||
1874 | ifc = connected_lookup_address (ifp, from.sin_addr); | |
1875 | ||
1876 | if (ifc == NULL) | |
1877 | { | |
766a0ca3 | 1878 | zlog_info ("rip_read: cannot find connected address for packet from %s " |
1879 | "port %d on interface %s", | |
1880 | inet_ntoa(from.sin_addr), ntohs (from.sin_port), ifp->name); | |
718e3744 | 1881 | return -1; |
1882 | } | |
1883 | ||
1884 | /* Packet length check. */ | |
1885 | if (len < RIP_PACKET_MINSIZ) | |
1886 | { | |
1887 | zlog_warn ("packet size %d is smaller than minimum size %d", | |
1888 | len, RIP_PACKET_MINSIZ); | |
1889 | rip_peer_bad_packet (&from); | |
1890 | return len; | |
1891 | } | |
1892 | if (len > RIP_PACKET_MAXSIZ) | |
1893 | { | |
1894 | zlog_warn ("packet size %d is larger than max size %d", | |
1895 | len, RIP_PACKET_MAXSIZ); | |
1896 | rip_peer_bad_packet (&from); | |
1897 | return len; | |
1898 | } | |
1899 | ||
1900 | /* Packet alignment check. */ | |
1901 | if ((len - RIP_PACKET_MINSIZ) % 20) | |
1902 | { | |
1903 | zlog_warn ("packet size %d is wrong for RIP packet alignment", len); | |
1904 | rip_peer_bad_packet (&from); | |
1905 | return len; | |
1906 | } | |
1907 | ||
1908 | /* Set RTE number. */ | |
1909 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1910 | ||
1911 | /* For easy to handle. */ | |
1912 | packet = &rip_buf.rip_packet; | |
1913 | ||
1914 | /* RIP version check. */ | |
1915 | if (packet->version == 0) | |
1916 | { | |
1917 | zlog_info ("version 0 with command %d received.", packet->command); | |
1918 | rip_peer_bad_packet (&from); | |
1919 | return -1; | |
1920 | } | |
1921 | ||
1922 | /* Dump RIP packet. */ | |
1923 | if (IS_RIP_DEBUG_RECV) | |
1924 | rip_packet_dump (packet, len, "RECV"); | |
1925 | ||
1926 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1927 | that "Version 1 implementations are to ignore this extra data and | |
1928 | process only the fields specified in this document.". So RIPv3 | |
1929 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1930 | if (packet->version > RIPv2) | |
1931 | packet->version = RIPv2; | |
1932 | ||
1933 | /* Is RIP running or is this RIP neighbor ?*/ | |
1934 | ri = ifp->info; | |
1935 | if (! ri->running && ! rip_neighbor_lookup (&from)) | |
1936 | { | |
1937 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1938 | zlog_debug ("RIP is not enabled on interface %s.", ifp->name); |
718e3744 | 1939 | rip_peer_bad_packet (&from); |
1940 | return -1; | |
1941 | } | |
1942 | ||
1943 | /* RIP Version check. */ | |
1944 | if (packet->command == RIP_RESPONSE) | |
1945 | { | |
f38a471c | 1946 | int vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? |
1947 | rip->version_recv : ri->ri_receive); | |
718e3744 | 1948 | if (packet->version == RIPv1) |
f38a471c | 1949 | if (! (vrecv & RIPv1)) |
718e3744 | 1950 | { |
1951 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1952 | zlog_debug (" packet's v%d doesn't fit to if version spec", |
718e3744 | 1953 | packet->version); |
1954 | rip_peer_bad_packet (&from); | |
1955 | return -1; | |
1956 | } | |
1957 | if (packet->version == RIPv2) | |
f38a471c | 1958 | if (! (vrecv & RIPv2)) |
718e3744 | 1959 | { |
1960 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 1961 | zlog_debug (" packet's v%d doesn't fit to if version spec", |
718e3744 | 1962 | packet->version); |
1963 | rip_peer_bad_packet (&from); | |
1964 | return -1; | |
1965 | } | |
718e3744 | 1966 | } |
1967 | ||
1968 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 | |
1969 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
1970 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
1971 | ||
1972 | if ((ri->auth_type == RIP_NO_AUTH) | |
1973 | && rtenum | |
ca5e516c | 1974 | && (packet->version == RIPv2) |
1975 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) | |
718e3744 | 1976 | { |
1977 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 1978 | zlog_debug ("packet RIPv%d is dropped because authentication disabled", |
718e3744 | 1979 | packet->version); |
1980 | rip_peer_bad_packet (&from); | |
1981 | return -1; | |
1982 | } | |
1983 | ||
1984 | /* If the router is configured to authenticate RIP-2 messages, then | |
1985 | RIP-1 messages and RIP-2 messages which pass authentication | |
1986 | testing shall be accepted; unauthenticated and failed | |
1987 | authentication RIP-2 messages shall be discarded. For maximum | |
1988 | security, RIP-1 messages should be ignored when authentication is | |
1989 | in use (see section 4.1); otherwise, the routing information from | |
1990 | authenticated messages will be propagated by RIP-1 routers in an | |
1991 | unauthenticated manner. */ | |
1992 | ||
1993 | if ((ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD | |
ca5e516c | 1994 | || ri->auth_type == RIP_AUTH_MD5) && rtenum) |
718e3744 | 1995 | { |
1996 | /* We follow maximum security. */ | |
ca5e516c | 1997 | if (packet->version == RIPv1 |
1998 | && packet->rte->family == htons(RIP_FAMILY_AUTH)) | |
718e3744 | 1999 | { |
2000 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2001 | zlog_debug |
ca5e516c | 2002 | ("packet RIPv%d is dropped because authentication enabled", |
2003 | packet->version); | |
718e3744 | 2004 | rip_peer_bad_packet (&from); |
2005 | return -1; | |
2006 | } | |
2007 | ||
2008 | /* Check RIPv2 authentication. */ | |
2009 | if (packet->version == RIPv2) | |
2010 | { | |
ca5e516c | 2011 | if (packet->rte->family == htons(RIP_FAMILY_AUTH)) |
718e3744 | 2012 | { |
ca5e516c | 2013 | if (packet->rte->tag == htons(RIP_AUTH_SIMPLE_PASSWORD)) |
718e3744 | 2014 | { |
2015 | ret = rip_auth_simple_password (packet->rte, &from, ifp); | |
2016 | if (! ret) | |
2017 | { | |
2018 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2019 | zlog_debug |
ca5e516c | 2020 | ("RIPv2 simple password authentication failed"); |
718e3744 | 2021 | rip_peer_bad_packet (&from); |
2022 | return -1; | |
2023 | } | |
2024 | else | |
2025 | { | |
2026 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2027 | zlog_debug |
ca5e516c | 2028 | ("RIPv2 simple password authentication success"); |
718e3744 | 2029 | } |
2030 | } | |
ca5e516c | 2031 | else if (packet->rte->tag == htons(RIP_AUTH_MD5)) |
718e3744 | 2032 | { |
ca5e516c | 2033 | ret = rip_auth_md5 (packet, &from, len, ifp); |
718e3744 | 2034 | if (! ret) |
2035 | { | |
2036 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2037 | zlog_debug ("RIPv2 MD5 authentication failed"); |
718e3744 | 2038 | rip_peer_bad_packet (&from); |
2039 | return -1; | |
2040 | } | |
2041 | else | |
2042 | { | |
2043 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2044 | zlog_debug ("RIPv2 MD5 authentication success"); |
718e3744 | 2045 | } |
2046 | /* Reset RIP packet length to trim MD5 data. */ | |
2047 | len = ret; | |
2048 | } | |
2049 | else | |
2050 | { | |
2051 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2052 | zlog_debug ("Unknown authentication type %d", |
718e3744 | 2053 | ntohs (packet->rte->tag)); |
2054 | rip_peer_bad_packet (&from); | |
2055 | return -1; | |
2056 | } | |
2057 | } | |
2058 | else | |
2059 | { | |
2060 | /* There is no authentication in the packet. */ | |
2061 | if (ri->auth_str || ri->key_chain) | |
2062 | { | |
2063 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2064 | zlog_debug |
ca5e516c | 2065 | ("RIPv2 authentication failed: no authentication in packet"); |
718e3744 | 2066 | rip_peer_bad_packet (&from); |
2067 | return -1; | |
2068 | } | |
2069 | } | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | /* Process each command. */ | |
2074 | switch (packet->command) | |
2075 | { | |
2076 | case RIP_RESPONSE: | |
c49ad8f1 | 2077 | rip_response_process (packet, len, &from, ifc); |
718e3744 | 2078 | break; |
2079 | case RIP_REQUEST: | |
2080 | case RIP_POLL: | |
c49ad8f1 | 2081 | rip_request_process (packet, len, &from, ifc); |
718e3744 | 2082 | break; |
2083 | case RIP_TRACEON: | |
2084 | case RIP_TRACEOFF: | |
2085 | zlog_info ("Obsolete command %s received, please sent it to routed", | |
2086 | lookup (rip_msg, packet->command)); | |
2087 | rip_peer_bad_packet (&from); | |
2088 | break; | |
2089 | case RIP_POLL_ENTRY: | |
2090 | zlog_info ("Obsolete command %s received", | |
2091 | lookup (rip_msg, packet->command)); | |
2092 | rip_peer_bad_packet (&from); | |
2093 | break; | |
2094 | default: | |
2095 | zlog_info ("Unknown RIP command %d received", packet->command); | |
2096 | rip_peer_bad_packet (&from); | |
2097 | break; | |
2098 | } | |
2099 | ||
2100 | return len; | |
2101 | } | |
2102 | ||
718e3744 | 2103 | /* Write routing table entry to the stream and return next index of |
2104 | the routing table entry in the stream. */ | |
dc63bfd4 | 2105 | static int |
718e3744 | 2106 | rip_write_rte (int num, struct stream *s, struct prefix_ipv4 *p, |
b14ee00b | 2107 | u_char version, struct rip_info *rinfo) |
718e3744 | 2108 | { |
2109 | struct in_addr mask; | |
718e3744 | 2110 | |
2111 | /* Write routing table entry. */ | |
2112 | if (version == RIPv1) | |
2113 | { | |
2114 | stream_putw (s, AF_INET); | |
2115 | stream_putw (s, 0); | |
2116 | stream_put_ipv4 (s, p->prefix.s_addr); | |
2117 | stream_put_ipv4 (s, 0); | |
2118 | stream_put_ipv4 (s, 0); | |
2119 | stream_putl (s, rinfo->metric_out); | |
2120 | } | |
2121 | else | |
2122 | { | |
2123 | masklen2ip (p->prefixlen, &mask); | |
2124 | ||
2125 | stream_putw (s, AF_INET); | |
16705130 | 2126 | stream_putw (s, rinfo->tag_out); |
718e3744 | 2127 | stream_put_ipv4 (s, p->prefix.s_addr); |
2128 | stream_put_ipv4 (s, mask.s_addr); | |
2129 | stream_put_ipv4 (s, rinfo->nexthop_out.s_addr); | |
2130 | stream_putl (s, rinfo->metric_out); | |
2131 | } | |
2132 | ||
2133 | return ++num; | |
2134 | } | |
2135 | ||
2136 | /* Send update to the ifp or spcified neighbor. */ | |
2137 | void | |
c49ad8f1 | 2138 | rip_output_process (struct connected *ifc, struct sockaddr_in *to, |
2139 | int route_type, u_char version) | |
718e3744 | 2140 | { |
2141 | int ret; | |
2142 | struct stream *s; | |
2143 | struct route_node *rp; | |
2144 | struct rip_info *rinfo; | |
2145 | struct rip_interface *ri; | |
2146 | struct prefix_ipv4 *p; | |
2147 | struct prefix_ipv4 classfull; | |
727d104b | 2148 | struct prefix_ipv4 ifaddrclass; |
b14ee00b | 2149 | struct key *key = NULL; |
2150 | /* this might need to made dynamic if RIP ever supported auth methods | |
2151 | with larger key string sizes */ | |
2152 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
dc63bfd4 | 2153 | size_t doff = 0; /* offset of digest offset field */ |
2c61ae37 | 2154 | int num = 0; |
718e3744 | 2155 | int rtemax; |
01d0908a | 2156 | int subnetted = 0; |
718e3744 | 2157 | |
2158 | /* Logging output event. */ | |
2159 | if (IS_RIP_DEBUG_EVENT) | |
2160 | { | |
2161 | if (to) | |
5d6c3779 | 2162 | zlog_debug ("update routes to neighbor %s", inet_ntoa (to->sin_addr)); |
718e3744 | 2163 | else |
5d6c3779 | 2164 | zlog_debug ("update routes on interface %s ifindex %d", |
c49ad8f1 | 2165 | ifc->ifp->name, ifc->ifp->ifindex); |
718e3744 | 2166 | } |
2167 | ||
2168 | /* Set output stream. */ | |
2169 | s = rip->obuf; | |
2170 | ||
2171 | /* Reset stream and RTE counter. */ | |
2172 | stream_reset (s); | |
718e3744 | 2173 | rtemax = (RIP_PACKET_MAXSIZ - 4) / 20; |
2174 | ||
2175 | /* Get RIP interface. */ | |
c49ad8f1 | 2176 | ri = ifc->ifp->info; |
718e3744 | 2177 | |
2178 | /* If output interface is in simple password authentication mode, we | |
2179 | need space for authentication data. */ | |
2180 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2181 | rtemax -= 1; | |
2182 | ||
2183 | /* If output interface is in MD5 authentication mode, we need space | |
2184 | for authentication header and data. */ | |
2185 | if (ri->auth_type == RIP_AUTH_MD5) | |
2186 | rtemax -= 2; | |
2187 | ||
2188 | /* If output interface is in simple password authentication mode | |
2189 | and string or keychain is specified we need space for auth. data */ | |
b14ee00b | 2190 | if (ri->auth_type != RIP_NO_AUTH) |
718e3744 | 2191 | { |
2192 | if (ri->key_chain) | |
2193 | { | |
2194 | struct keychain *keychain; | |
2195 | ||
2196 | keychain = keychain_lookup (ri->key_chain); | |
2197 | if (keychain) | |
b14ee00b | 2198 | key = key_lookup_for_send (keychain); |
718e3744 | 2199 | } |
b14ee00b | 2200 | /* to be passed to auth functions later */ |
2201 | rip_auth_prepare_str_send (ri, key, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
718e3744 | 2202 | } |
2203 | ||
727d104b | 2204 | if (version == RIPv1) |
2205 | { | |
c49ad8f1 | 2206 | memcpy (&ifaddrclass, ifc->address, sizeof (struct prefix_ipv4)); |
727d104b | 2207 | apply_classful_mask_ipv4 (&ifaddrclass); |
2208 | subnetted = 0; | |
c49ad8f1 | 2209 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) |
01d0908a | 2210 | subnetted = 1; |
727d104b | 2211 | } |
2212 | ||
718e3744 | 2213 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) |
2214 | if ((rinfo = rp->info) != NULL) | |
2215 | { | |
727d104b | 2216 | /* For RIPv1, if we are subnetted, output subnets in our network */ |
2217 | /* that have the same mask as the output "interface". For other */ | |
2218 | /* networks, only the classfull version is output. */ | |
718e3744 | 2219 | |
2220 | if (version == RIPv1) | |
2221 | { | |
727d104b | 2222 | p = (struct prefix_ipv4 *) &rp->p; |
718e3744 | 2223 | |
2224 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2225 | zlog_debug("RIPv1 mask check, %s/%d considered for output", |
727d104b | 2226 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
718e3744 | 2227 | |
727d104b | 2228 | if (subnetted && |
2229 | prefix_match ((struct prefix *) &ifaddrclass, &rp->p)) | |
2230 | { | |
c49ad8f1 | 2231 | if ((ifc->address->prefixlen != rp->p.prefixlen) && |
727d104b | 2232 | (rp->p.prefixlen != 32)) |
2233 | continue; | |
2234 | } | |
2235 | else | |
2236 | { | |
2237 | memcpy (&classfull, &rp->p, sizeof(struct prefix_ipv4)); | |
2238 | apply_classful_mask_ipv4(&classfull); | |
2239 | if (rp->p.u.prefix4.s_addr != 0 && | |
2240 | classfull.prefixlen != rp->p.prefixlen) | |
2241 | continue; | |
2242 | } | |
718e3744 | 2243 | if (IS_RIP_DEBUG_PACKET) |
5d6c3779 | 2244 | zlog_debug("RIPv1 mask check, %s/%d made it through", |
727d104b | 2245 | inet_ntoa (rp->p.u.prefix4), rp->p.prefixlen); |
718e3744 | 2246 | } |
2247 | else | |
2248 | p = (struct prefix_ipv4 *) &rp->p; | |
2249 | ||
2250 | /* Apply output filters. */ | |
2251 | ret = rip_outgoing_filter (p, ri); | |
2252 | if (ret < 0) | |
2253 | continue; | |
2254 | ||
2255 | /* Changed route only output. */ | |
2256 | if (route_type == rip_changed_route && | |
2257 | (! (rinfo->flags & RIP_RTF_CHANGED))) | |
2258 | continue; | |
2259 | ||
2260 | /* Split horizon. */ | |
2261 | /* if (split_horizon == rip_split_horizon) */ | |
16705130 | 2262 | if (ri->split_horizon == RIP_SPLIT_HORIZON) |
718e3744 | 2263 | { |
42d14d98 | 2264 | /* |
2265 | * We perform split horizon for RIP and connected route. | |
2266 | * For rip routes, we want to suppress the route if we would | |
2267 | * end up sending the route back on the interface that we | |
2268 | * learned it from, with a higher metric. For connected routes, | |
2269 | * we suppress the route if the prefix is a subset of the | |
2270 | * source address that we are going to use for the packet | |
2271 | * (in order to handle the case when multiple subnets are | |
2272 | * configured on the same interface). | |
2273 | */ | |
2274 | if (rinfo->type == ZEBRA_ROUTE_RIP && | |
c49ad8f1 | 2275 | rinfo->ifindex == ifc->ifp->ifindex) |
42d14d98 | 2276 | continue; |
2277 | if (rinfo->type == ZEBRA_ROUTE_CONNECT && | |
c49ad8f1 | 2278 | prefix_match((struct prefix *)p, ifc->address)) |
718e3744 | 2279 | continue; |
2280 | } | |
2281 | ||
2282 | /* Preparation for route-map. */ | |
2283 | rinfo->metric_set = 0; | |
2284 | rinfo->nexthop_out.s_addr = 0; | |
2285 | rinfo->metric_out = rinfo->metric; | |
16705130 | 2286 | rinfo->tag_out = rinfo->tag; |
c49ad8f1 | 2287 | rinfo->ifindex_out = ifc->ifp->ifindex; |
718e3744 | 2288 | |
16705130 | 2289 | /* In order to avoid some local loops, |
2290 | * if the RIP route has a nexthop via this interface, keep the nexthop, | |
2291 | * otherwise set it to 0. The nexthop should not be propagated | |
2292 | * beyond the local broadcast/multicast area in order | |
2293 | * to avoid an IGP multi-level recursive look-up. | |
2294 | * see (4.4) | |
2295 | */ | |
c49ad8f1 | 2296 | if (rinfo->ifindex == ifc->ifp->ifindex) |
718e3744 | 2297 | rinfo->nexthop_out = rinfo->nexthop; |
16705130 | 2298 | |
2299 | /* Interface route-map */ | |
2300 | if (ri->routemap[RIP_FILTER_OUT]) | |
2301 | { | |
2302 | ret = route_map_apply (ri->routemap[RIP_FILTER_OUT], | |
2303 | (struct prefix *) p, RMAP_RIP, | |
2304 | rinfo); | |
2305 | ||
2306 | if (ret == RMAP_DENYMATCH) | |
2307 | { | |
2308 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2309 | zlog_debug ("RIP %s/%d is filtered by route-map out", |
16705130 | 2310 | inet_ntoa (p->prefix), p->prefixlen); |
2311 | continue; | |
2312 | } | |
2313 | } | |
718e3744 | 2314 | |
16705130 | 2315 | /* Apply redistribute route map - continue, if deny */ |
718e3744 | 2316 | if (rip->route_map[rinfo->type].name |
2317 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) | |
2318 | { | |
2319 | ret = route_map_apply (rip->route_map[rinfo->type].map, | |
2320 | (struct prefix *)p, RMAP_RIP, rinfo); | |
2321 | ||
2322 | if (ret == RMAP_DENYMATCH) | |
2323 | { | |
2324 | if (IS_RIP_DEBUG_PACKET) | |
5d6c3779 | 2325 | zlog_debug ("%s/%d is filtered by route-map", |
718e3744 | 2326 | inet_ntoa (p->prefix), p->prefixlen); |
2327 | continue; | |
2328 | } | |
2329 | } | |
2330 | ||
2331 | /* When route-map does not set metric. */ | |
2332 | if (! rinfo->metric_set) | |
2333 | { | |
2334 | /* If redistribute metric is set. */ | |
2335 | if (rip->route_map[rinfo->type].metric_config | |
2336 | && rinfo->metric != RIP_METRIC_INFINITY) | |
2337 | { | |
2338 | rinfo->metric_out = rip->route_map[rinfo->type].metric; | |
2339 | } | |
2340 | else | |
2341 | { | |
2342 | /* If the route is not connected or localy generated | |
2343 | one, use default-metric value*/ | |
2344 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
2345 | && rinfo->type != ZEBRA_ROUTE_CONNECT | |
2346 | && rinfo->metric != RIP_METRIC_INFINITY) | |
2347 | rinfo->metric_out = rip->default_metric; | |
2348 | } | |
2349 | } | |
2350 | ||
2351 | /* Apply offset-list */ | |
2352 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
c49ad8f1 | 2353 | rip_offset_list_apply_out (p, ifc->ifp, &rinfo->metric_out); |
718e3744 | 2354 | |
2355 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2356 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
16705130 | 2357 | |
2358 | /* Perform split-horizon with poisoned reverse | |
2359 | * for RIP and connected routes. | |
2360 | **/ | |
2361 | if (ri->split_horizon == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
42d14d98 | 2362 | /* |
2363 | * We perform split horizon for RIP and connected route. | |
2364 | * For rip routes, we want to suppress the route if we would | |
2365 | * end up sending the route back on the interface that we | |
2366 | * learned it from, with a higher metric. For connected routes, | |
2367 | * we suppress the route if the prefix is a subset of the | |
2368 | * source address that we are going to use for the packet | |
2369 | * (in order to handle the case when multiple subnets are | |
2370 | * configured on the same interface). | |
2371 | */ | |
2372 | if (rinfo->type == ZEBRA_ROUTE_RIP && | |
c49ad8f1 | 2373 | rinfo->ifindex == ifc->ifp->ifindex) |
16705130 | 2374 | rinfo->metric_out = RIP_METRIC_INFINITY; |
42d14d98 | 2375 | if (rinfo->type == ZEBRA_ROUTE_CONNECT && |
c49ad8f1 | 2376 | prefix_match((struct prefix *)p, ifc->address)) |
42d14d98 | 2377 | rinfo->metric_out = RIP_METRIC_INFINITY; |
16705130 | 2378 | } |
b14ee00b | 2379 | |
2380 | /* Prepare preamble, auth headers, if needs be */ | |
2381 | if (num == 0) | |
2382 | { | |
2383 | stream_putc (s, RIP_RESPONSE); | |
2384 | stream_putc (s, version); | |
2385 | stream_putw (s, 0); | |
2386 | ||
0cb8a01c | 2387 | /* auth header for !v1 && !no_auth */ |
2388 | if ( (ri->auth_type != RIP_NO_AUTH) && (version != RIPv1) ) | |
b14ee00b | 2389 | doff = rip_auth_header_write (s, ri, key, auth_str, |
2390 | RIP_AUTH_SIMPLE_SIZE); | |
2391 | } | |
2392 | ||
718e3744 | 2393 | /* Write RTE to the stream. */ |
b14ee00b | 2394 | num = rip_write_rte (num, s, p, version, rinfo); |
718e3744 | 2395 | if (num == rtemax) |
2396 | { | |
2397 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
b14ee00b | 2398 | rip_auth_md5_set (s, ri, doff, auth_str, RIP_AUTH_SIMPLE_SIZE); |
718e3744 | 2399 | |
2400 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), | |
c49ad8f1 | 2401 | to, ifc); |
718e3744 | 2402 | |
2403 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2404 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), | |
2405 | stream_get_endp(s), "SEND"); | |
2406 | num = 0; | |
2407 | stream_reset (s); | |
2408 | } | |
2409 | } | |
2410 | ||
2411 | /* Flush unwritten RTE. */ | |
2412 | if (num != 0) | |
2413 | { | |
2414 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
b14ee00b | 2415 | rip_auth_md5_set (s, ri, doff, auth_str, RIP_AUTH_SIMPLE_SIZE); |
718e3744 | 2416 | |
c49ad8f1 | 2417 | ret = rip_send_packet (STREAM_DATA (s), stream_get_endp (s), to, ifc); |
718e3744 | 2418 | |
2419 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2420 | rip_packet_dump ((struct rip_packet *)STREAM_DATA (s), | |
2421 | stream_get_endp (s), "SEND"); | |
2422 | num = 0; | |
2423 | stream_reset (s); | |
2424 | } | |
2425 | ||
2426 | /* Statistics updates. */ | |
2427 | ri->sent_updates++; | |
2428 | } | |
2429 | ||
2430 | /* Send RIP packet to the interface. */ | |
dc63bfd4 | 2431 | static void |
c49ad8f1 | 2432 | rip_update_interface (struct connected *ifc, u_char version, int route_type) |
718e3744 | 2433 | { |
718e3744 | 2434 | struct sockaddr_in to; |
2435 | ||
2436 | /* When RIP version is 2 and multicast enable interface. */ | |
c49ad8f1 | 2437 | if (version == RIPv2 && if_is_multicast (ifc->ifp)) |
718e3744 | 2438 | { |
2439 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2440 | zlog_debug ("multicast announce on %s ", ifc->ifp->name); |
718e3744 | 2441 | |
c49ad8f1 | 2442 | rip_output_process (ifc, NULL, route_type, version); |
718e3744 | 2443 | return; |
2444 | } | |
c49ad8f1 | 2445 | |
718e3744 | 2446 | /* If we can't send multicast packet, send it with unicast. */ |
c49ad8f1 | 2447 | if (if_is_broadcast (ifc->ifp) || if_is_pointopoint (ifc->ifp)) |
718e3744 | 2448 | { |
c49ad8f1 | 2449 | if (ifc->address->family == AF_INET) |
2450 | { | |
2451 | /* Destination address and port setting. */ | |
2452 | memset (&to, 0, sizeof (struct sockaddr_in)); | |
2453 | if (ifc->destination) | |
2454 | /* use specified broadcast or point-to-point destination addr */ | |
2455 | to.sin_addr = ifc->destination->u.prefix4; | |
2456 | else | |
2457 | /* calculate the appropriate broadcast address */ | |
2458 | to.sin_addr.s_addr = | |
2459 | ipv4_broadcast_addr(ifc->address->u.prefix4.s_addr, | |
2460 | ifc->address->prefixlen); | |
2461 | to.sin_port = htons (RIP_PORT_DEFAULT); | |
718e3744 | 2462 | |
c49ad8f1 | 2463 | if (IS_RIP_DEBUG_EVENT) |
5d6c3779 | 2464 | zlog_debug ("%s announce to %s on %s", |
c49ad8f1 | 2465 | if_is_pointopoint (ifc->ifp) ? "unicast" : "broadcast", |
2466 | inet_ntoa (to.sin_addr), ifc->ifp->name); | |
718e3744 | 2467 | |
c49ad8f1 | 2468 | rip_output_process (ifc, &to, route_type, version); |
2469 | } | |
718e3744 | 2470 | } |
2471 | } | |
2472 | ||
2473 | /* Update send to all interface and neighbor. */ | |
dc63bfd4 | 2474 | static void |
718e3744 | 2475 | rip_update_process (int route_type) |
2476 | { | |
1eb8ef25 | 2477 | struct listnode *node; |
2478 | struct listnode *ifnode, *ifnnode; | |
cc1131ab | 2479 | struct connected *connected; |
718e3744 | 2480 | struct interface *ifp; |
2481 | struct rip_interface *ri; | |
2482 | struct route_node *rp; | |
2483 | struct sockaddr_in to; | |
2484 | struct prefix_ipv4 *p; | |
2485 | ||
2486 | /* Send RIP update to each interface. */ | |
1eb8ef25 | 2487 | for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp)) |
718e3744 | 2488 | { |
718e3744 | 2489 | if (if_is_loopback (ifp)) |
2490 | continue; | |
2491 | ||
2e3b2e47 | 2492 | if (! if_is_operative (ifp)) |
718e3744 | 2493 | continue; |
2494 | ||
2495 | /* Fetch RIP interface information. */ | |
2496 | ri = ifp->info; | |
2497 | ||
2498 | /* When passive interface is specified, suppress announce to the | |
2499 | interface. */ | |
2500 | if (ri->passive) | |
2501 | continue; | |
2502 | ||
2503 | if (ri->running) | |
2504 | { | |
2505 | if (IS_RIP_DEBUG_EVENT) | |
2506 | { | |
2507 | if (ifp->name) | |
5d6c3779 | 2508 | zlog_debug ("SEND UPDATE to %s ifindex %d", |
718e3744 | 2509 | ifp->name, ifp->ifindex); |
2510 | else | |
5d6c3779 | 2511 | zlog_debug ("SEND UPDATE to _unknown_ ifindex %d", |
718e3744 | 2512 | ifp->ifindex); |
2513 | } | |
2514 | ||
cc1131ab | 2515 | /* send update on each connected network */ |
1eb8ef25 | 2516 | for (ALL_LIST_ELEMENTS (ifp->connected, ifnode, ifnnode, connected)) |
cc1131ab | 2517 | { |
2518 | struct prefix_ipv4 *ifaddr; | |
931cd54d | 2519 | int done = 0; |
2520 | /* | |
2521 | * If there is no version configuration in the interface, | |
2522 | * use rip's version setting. | |
2523 | */ | |
f38a471c | 2524 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) ? |
2525 | rip->version_send : ri->ri_send); | |
cc1131ab | 2526 | |
2527 | ifaddr = (struct prefix_ipv4 *) connected->address; | |
2528 | ||
2529 | if (ifaddr->family != AF_INET) | |
2530 | continue; | |
2531 | ||
931cd54d | 2532 | if ((vsend & RIPv1) && !done) |
c49ad8f1 | 2533 | rip_update_interface (connected, RIPv1, route_type); |
931cd54d | 2534 | if ((vsend & RIPv2) && if_is_multicast(ifp)) |
c49ad8f1 | 2535 | rip_update_interface (connected, RIPv2, route_type); |
931cd54d | 2536 | done = 1; |
2537 | if (!(vsend & RIPv2) || !if_is_multicast(ifp)) | |
2538 | break; | |
2539 | ||
f38a471c | 2540 | } |
718e3744 | 2541 | } |
2542 | } | |
2543 | ||
2544 | /* RIP send updates to each neighbor. */ | |
2545 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) | |
2546 | if (rp->info != NULL) | |
2547 | { | |
2548 | p = (struct prefix_ipv4 *) &rp->p; | |
2549 | ||
2550 | ifp = if_lookup_address (p->prefix); | |
2551 | if (! ifp) | |
2552 | { | |
c49ad8f1 | 2553 | zlog_warn ("Neighbor %s doesnt have connected interface!", |
718e3744 | 2554 | inet_ntoa (p->prefix)); |
2555 | continue; | |
2556 | } | |
c49ad8f1 | 2557 | |
2558 | if ( (connected = connected_lookup_address (ifp, p->prefix)) == NULL) | |
2559 | { | |
2560 | zlog_warn ("Neighbor %s doesnt have connected network", | |
2561 | inet_ntoa (p->prefix)); | |
2562 | continue; | |
2563 | } | |
2564 | ||
718e3744 | 2565 | /* Set destination address and port */ |
2566 | memset (&to, 0, sizeof (struct sockaddr_in)); | |
2567 | to.sin_addr = p->prefix; | |
2568 | to.sin_port = htons (RIP_PORT_DEFAULT); | |
2569 | ||
2570 | /* RIP version is rip's configuration. */ | |
c49ad8f1 | 2571 | rip_output_process (connected, &to, route_type, rip->version_send); |
718e3744 | 2572 | } |
2573 | } | |
2574 | ||
2575 | /* RIP's periodical timer. */ | |
dc63bfd4 | 2576 | static int |
718e3744 | 2577 | rip_update (struct thread *t) |
2578 | { | |
2579 | /* Clear timer pointer. */ | |
2580 | rip->t_update = NULL; | |
2581 | ||
2582 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2583 | zlog_debug ("update timer fire!"); |
718e3744 | 2584 | |
2585 | /* Process update output. */ | |
2586 | rip_update_process (rip_all_route); | |
2587 | ||
2588 | /* Triggered updates may be suppressed if a regular update is due by | |
2589 | the time the triggered update would be sent. */ | |
2590 | if (rip->t_triggered_interval) | |
2591 | { | |
2592 | thread_cancel (rip->t_triggered_interval); | |
2593 | rip->t_triggered_interval = NULL; | |
2594 | } | |
2595 | rip->trigger = 0; | |
2596 | ||
2597 | /* Register myself. */ | |
2598 | rip_event (RIP_UPDATE_EVENT, 0); | |
2599 | ||
2600 | return 0; | |
2601 | } | |
2602 | ||
2603 | /* Walk down the RIP routing table then clear changed flag. */ | |
dc63bfd4 | 2604 | static void |
216565ab | 2605 | rip_clear_changed_flag (void) |
718e3744 | 2606 | { |
2607 | struct route_node *rp; | |
2608 | struct rip_info *rinfo; | |
2609 | ||
2610 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
2611 | if ((rinfo = rp->info) != NULL) | |
2612 | if (rinfo->flags & RIP_RTF_CHANGED) | |
2613 | rinfo->flags &= ~RIP_RTF_CHANGED; | |
2614 | } | |
2615 | ||
2616 | /* Triggered update interval timer. */ | |
dc63bfd4 | 2617 | static int |
718e3744 | 2618 | rip_triggered_interval (struct thread *t) |
2619 | { | |
2620 | int rip_triggered_update (struct thread *); | |
2621 | ||
2622 | rip->t_triggered_interval = NULL; | |
2623 | ||
2624 | if (rip->trigger) | |
2625 | { | |
2626 | rip->trigger = 0; | |
2627 | rip_triggered_update (t); | |
2628 | } | |
2629 | return 0; | |
2630 | } | |
2631 | ||
2632 | /* Execute triggered update. */ | |
dc63bfd4 | 2633 | static int |
718e3744 | 2634 | rip_triggered_update (struct thread *t) |
2635 | { | |
2636 | int interval; | |
2637 | ||
2638 | /* Clear thred pointer. */ | |
2639 | rip->t_triggered_update = NULL; | |
2640 | ||
2641 | /* Cancel interval timer. */ | |
2642 | if (rip->t_triggered_interval) | |
2643 | { | |
2644 | thread_cancel (rip->t_triggered_interval); | |
2645 | rip->t_triggered_interval = NULL; | |
2646 | } | |
2647 | rip->trigger = 0; | |
2648 | ||
2649 | /* Logging triggered update. */ | |
2650 | if (IS_RIP_DEBUG_EVENT) | |
5d6c3779 | 2651 | zlog_debug ("triggered update!"); |
718e3744 | 2652 | |
2653 | /* Split Horizon processing is done when generating triggered | |
2654 | updates as well as normal updates (see section 2.6). */ | |
2655 | rip_update_process (rip_changed_route); | |
2656 | ||
2657 | /* Once all of the triggered updates have been generated, the route | |
2658 | change flags should be cleared. */ | |
2659 | rip_clear_changed_flag (); | |
2660 | ||
2661 | /* After a triggered update is sent, a timer should be set for a | |
2662 | random interval between 1 and 5 seconds. If other changes that | |
2663 | would trigger updates occur before the timer expires, a single | |
2664 | update is triggered when the timer expires. */ | |
2665 | interval = (random () % 5) + 1; | |
2666 | ||
2667 | rip->t_triggered_interval = | |
2668 | thread_add_timer (master, rip_triggered_interval, NULL, interval); | |
2669 | ||
2670 | return 0; | |
2671 | } | |
2672 | ||
2673 | /* Withdraw redistributed route. */ | |
2674 | void | |
2675 | rip_redistribute_withdraw (int type) | |
2676 | { | |
2677 | struct route_node *rp; | |
2678 | struct rip_info *rinfo; | |
2679 | ||
2680 | if (!rip) | |
2681 | return; | |
2682 | ||
2683 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
2684 | if ((rinfo = rp->info) != NULL) | |
2685 | { | |
2686 | if (rinfo->type == type | |
2687 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) | |
2688 | { | |
2689 | /* Perform poisoned reverse. */ | |
2690 | rinfo->metric = RIP_METRIC_INFINITY; | |
2691 | RIP_TIMER_ON (rinfo->t_garbage_collect, | |
2692 | rip_garbage_collect, rip->garbage_time); | |
2693 | RIP_TIMER_OFF (rinfo->t_timeout); | |
2694 | rinfo->flags |= RIP_RTF_CHANGED; | |
2695 | ||
16705130 | 2696 | if (IS_RIP_DEBUG_EVENT) { |
2697 | struct prefix_ipv4 *p = (struct prefix_ipv4 *) &rp->p; | |
2698 | ||
5d6c3779 | 2699 | zlog_debug ("Poisone %s/%d on the interface %s with an infinity metric [withdraw]", |
16705130 | 2700 | inet_ntoa(p->prefix), p->prefixlen, |
2701 | ifindex2ifname(rinfo->ifindex)); | |
2702 | } | |
2703 | ||
718e3744 | 2704 | rip_event (RIP_TRIGGERED_UPDATE, 0); |
2705 | } | |
2706 | } | |
2707 | } | |
2708 | ||
2709 | /* Create new RIP instance and set it to global variable. */ | |
dc63bfd4 | 2710 | static int |
2711 | rip_create (void) | |
718e3744 | 2712 | { |
2713 | rip = XMALLOC (MTYPE_RIP, sizeof (struct rip)); | |
2714 | memset (rip, 0, sizeof (struct rip)); | |
2715 | ||
2716 | /* Set initial value. */ | |
f38a471c | 2717 | rip->version_send = RI_RIP_VERSION_2; |
2718 | rip->version_recv = RI_RIP_VERSION_1_AND_2; | |
718e3744 | 2719 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; |
2720 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; | |
2721 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; | |
2722 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; | |
2723 | ||
2724 | /* Initialize RIP routig table. */ | |
2725 | rip->table = route_table_init (); | |
2726 | rip->route = route_table_init (); | |
2727 | rip->neighbor = route_table_init (); | |
2728 | ||
2729 | /* Make output stream. */ | |
2730 | rip->obuf = stream_new (1500); | |
2731 | ||
2732 | /* Make socket. */ | |
f69bd9da | 2733 | rip->sock = rip_create_socket (NULL); |
718e3744 | 2734 | if (rip->sock < 0) |
2735 | return rip->sock; | |
2736 | ||
2737 | /* Create read and timer thread. */ | |
2738 | rip_event (RIP_READ, rip->sock); | |
2739 | rip_event (RIP_UPDATE_EVENT, 1); | |
2740 | ||
2741 | return 0; | |
2742 | } | |
2743 | ||
2744 | /* Sned RIP request to the destination. */ | |
2745 | int | |
2746 | rip_request_send (struct sockaddr_in *to, struct interface *ifp, | |
931cd54d | 2747 | u_char version, struct connected *connected) |
718e3744 | 2748 | { |
2749 | struct rte *rte; | |
2750 | struct rip_packet rip_packet; | |
1eb8ef25 | 2751 | struct listnode *node, *nnode; |
718e3744 | 2752 | |
2753 | memset (&rip_packet, 0, sizeof (rip_packet)); | |
2754 | ||
2755 | rip_packet.command = RIP_REQUEST; | |
2756 | rip_packet.version = version; | |
2757 | rte = rip_packet.rte; | |
2758 | rte->metric = htonl (RIP_METRIC_INFINITY); | |
2759 | ||
931cd54d | 2760 | if (connected) |
2761 | { | |
2762 | /* | |
2763 | * connected is only sent for ripv1 case, or when | |
2764 | * interface does not support multicast. Caller loops | |
2765 | * over each connected address for this case. | |
2766 | */ | |
11dde9c2 | 2767 | if (rip_send_packet ((u_char *) &rip_packet, sizeof (rip_packet), |
c49ad8f1 | 2768 | to, connected) != sizeof (rip_packet)) |
931cd54d | 2769 | return -1; |
2770 | else | |
2771 | return sizeof (rip_packet); | |
2772 | } | |
2773 | ||
cc1131ab | 2774 | /* send request on each connected network */ |
1eb8ef25 | 2775 | for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, connected)) |
cc1131ab | 2776 | { |
2777 | struct prefix_ipv4 *p; | |
2778 | ||
2779 | p = (struct prefix_ipv4 *) connected->address; | |
2780 | ||
2781 | if (p->family != AF_INET) | |
2782 | continue; | |
2783 | ||
11dde9c2 | 2784 | if (rip_send_packet ((u_char *) &rip_packet, sizeof (rip_packet), |
c49ad8f1 | 2785 | to, connected) != sizeof (rip_packet)) |
cc1131ab | 2786 | return -1; |
2787 | } | |
2788 | return sizeof (rip_packet); | |
718e3744 | 2789 | } |
2790 | \f | |
dc63bfd4 | 2791 | static int |
718e3744 | 2792 | rip_update_jitter (unsigned long time) |
2793 | { | |
239389ba | 2794 | #define JITTER_BOUND 4 |
2795 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. | |
2796 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2797 | The RIPv2 RFC says jitter should be small compared to | |
2798 | update_time. We consider 1/JITTER_BOUND to be small. | |
2799 | */ | |
2800 | ||
2801 | int jitter_input = time; | |
2802 | int jitter; | |
2803 | ||
2804 | if (jitter_input < JITTER_BOUND) | |
2805 | jitter_input = JITTER_BOUND; | |
2806 | ||
2807 | jitter = (((rand () % ((jitter_input * 2) + 1)) - jitter_input)); | |
2808 | ||
2809 | return jitter/JITTER_BOUND; | |
718e3744 | 2810 | } |
2811 | ||
2812 | void | |
2813 | rip_event (enum rip_event event, int sock) | |
2814 | { | |
2815 | int jitter = 0; | |
2816 | ||
2817 | switch (event) | |
2818 | { | |
2819 | case RIP_READ: | |
2820 | rip->t_read = thread_add_read (master, rip_read, NULL, sock); | |
2821 | break; | |
2822 | case RIP_UPDATE_EVENT: | |
2823 | if (rip->t_update) | |
2824 | { | |
2825 | thread_cancel (rip->t_update); | |
2826 | rip->t_update = NULL; | |
2827 | } | |
2828 | jitter = rip_update_jitter (rip->update_time); | |
2829 | rip->t_update = | |
2830 | thread_add_timer (master, rip_update, NULL, | |
2831 | sock ? 2 : rip->update_time + jitter); | |
2832 | break; | |
2833 | case RIP_TRIGGERED_UPDATE: | |
2834 | if (rip->t_triggered_interval) | |
2835 | rip->trigger = 1; | |
2836 | else if (! rip->t_triggered_update) | |
2837 | rip->t_triggered_update = | |
2838 | thread_add_event (master, rip_triggered_update, NULL, 0); | |
2839 | break; | |
2840 | default: | |
2841 | break; | |
2842 | } | |
2843 | } | |
2844 | \f | |
2845 | DEFUN (router_rip, | |
2846 | router_rip_cmd, | |
2847 | "router rip", | |
2848 | "Enable a routing process\n" | |
2849 | "Routing Information Protocol (RIP)\n") | |
2850 | { | |
2851 | int ret; | |
2852 | ||
2853 | /* If rip is not enabled before. */ | |
2854 | if (! rip) | |
2855 | { | |
2856 | ret = rip_create (); | |
2857 | if (ret < 0) | |
2858 | { | |
2859 | zlog_info ("Can't create RIP"); | |
2860 | return CMD_WARNING; | |
2861 | } | |
2862 | } | |
2863 | vty->node = RIP_NODE; | |
2864 | vty->index = rip; | |
2865 | ||
2866 | return CMD_SUCCESS; | |
2867 | } | |
2868 | ||
2869 | DEFUN (no_router_rip, | |
2870 | no_router_rip_cmd, | |
2871 | "no router rip", | |
2872 | NO_STR | |
2873 | "Enable a routing process\n" | |
2874 | "Routing Information Protocol (RIP)\n") | |
2875 | { | |
2876 | if (rip) | |
2877 | rip_clean (); | |
2878 | return CMD_SUCCESS; | |
2879 | } | |
2880 | ||
2881 | DEFUN (rip_version, | |
2882 | rip_version_cmd, | |
2883 | "version <1-2>", | |
2884 | "Set routing protocol version\n" | |
2885 | "version\n") | |
2886 | { | |
2887 | int version; | |
2888 | ||
2889 | version = atoi (argv[0]); | |
2890 | if (version != RIPv1 && version != RIPv2) | |
2891 | { | |
2892 | vty_out (vty, "invalid rip version %d%s", version, | |
2893 | VTY_NEWLINE); | |
2894 | return CMD_WARNING; | |
2895 | } | |
f38a471c | 2896 | rip->version_send = version; |
2897 | rip->version_recv = version; | |
718e3744 | 2898 | |
2899 | return CMD_SUCCESS; | |
2900 | } | |
2901 | ||
2902 | DEFUN (no_rip_version, | |
2903 | no_rip_version_cmd, | |
2904 | "no version", | |
2905 | NO_STR | |
2906 | "Set routing protocol version\n") | |
2907 | { | |
2908 | /* Set RIP version to the default. */ | |
f38a471c | 2909 | rip->version_send = RI_RIP_VERSION_2; |
2910 | rip->version_recv = RI_RIP_VERSION_1_AND_2; | |
718e3744 | 2911 | |
2912 | return CMD_SUCCESS; | |
2913 | } | |
2914 | ||
2915 | ALIAS (no_rip_version, | |
2916 | no_rip_version_val_cmd, | |
2917 | "no version <1-2>", | |
2918 | NO_STR | |
2919 | "Set routing protocol version\n" | |
2920 | "version\n") | |
2921 | ||
2922 | DEFUN (rip_route, | |
2923 | rip_route_cmd, | |
2924 | "route A.B.C.D/M", | |
2925 | "RIP static route configuration\n" | |
2926 | "IP prefix <network>/<length>\n") | |
2927 | { | |
2928 | int ret; | |
2929 | struct prefix_ipv4 p; | |
2930 | struct route_node *node; | |
2931 | ||
2932 | ret = str2prefix_ipv4 (argv[0], &p); | |
2933 | if (ret < 0) | |
2934 | { | |
2935 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); | |
2936 | return CMD_WARNING; | |
2937 | } | |
2938 | apply_mask_ipv4 (&p); | |
2939 | ||
2940 | /* For router rip configuration. */ | |
2941 | node = route_node_get (rip->route, (struct prefix *) &p); | |
2942 | ||
2943 | if (node->info) | |
2944 | { | |
2945 | vty_out (vty, "There is already same static route.%s", VTY_NEWLINE); | |
2946 | route_unlock_node (node); | |
2947 | return CMD_WARNING; | |
2948 | } | |
2949 | ||
8a676be3 | 2950 | node->info = (char *)"static"; |
718e3744 | 2951 | |
fbf5d033 | 2952 | rip_redistribute_add (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0, NULL, 0, 0); |
718e3744 | 2953 | |
2954 | return CMD_SUCCESS; | |
2955 | } | |
2956 | ||
2957 | DEFUN (no_rip_route, | |
2958 | no_rip_route_cmd, | |
2959 | "no route A.B.C.D/M", | |
2960 | NO_STR | |
2961 | "RIP static route configuration\n" | |
2962 | "IP prefix <network>/<length>\n") | |
2963 | { | |
2964 | int ret; | |
2965 | struct prefix_ipv4 p; | |
2966 | struct route_node *node; | |
2967 | ||
2968 | ret = str2prefix_ipv4 (argv[0], &p); | |
2969 | if (ret < 0) | |
2970 | { | |
2971 | vty_out (vty, "Malformed address%s", VTY_NEWLINE); | |
2972 | return CMD_WARNING; | |
2973 | } | |
2974 | apply_mask_ipv4 (&p); | |
2975 | ||
2976 | /* For router rip configuration. */ | |
2977 | node = route_node_lookup (rip->route, (struct prefix *) &p); | |
2978 | if (! node) | |
2979 | { | |
2980 | vty_out (vty, "Can't find route %s.%s", argv[0], | |
2981 | VTY_NEWLINE); | |
2982 | return CMD_WARNING; | |
2983 | } | |
2984 | ||
2985 | rip_redistribute_delete (ZEBRA_ROUTE_RIP, RIP_ROUTE_STATIC, &p, 0); | |
2986 | route_unlock_node (node); | |
2987 | ||
2988 | node->info = NULL; | |
2989 | route_unlock_node (node); | |
2990 | ||
2991 | return CMD_SUCCESS; | |
2992 | } | |
2993 | ||
dc63bfd4 | 2994 | static void |
216565ab | 2995 | rip_update_default_metric (void) |
718e3744 | 2996 | { |
2997 | struct route_node *np; | |
2998 | struct rip_info *rinfo; | |
2999 | ||
3000 | for (np = route_top (rip->table); np; np = route_next (np)) | |
3001 | if ((rinfo = np->info) != NULL) | |
3002 | if (rinfo->type != ZEBRA_ROUTE_RIP && rinfo->type != ZEBRA_ROUTE_CONNECT) | |
3003 | rinfo->metric = rip->default_metric; | |
3004 | } | |
3005 | ||
3006 | DEFUN (rip_default_metric, | |
3007 | rip_default_metric_cmd, | |
3008 | "default-metric <1-16>", | |
3009 | "Set a metric of redistribute routes\n" | |
3010 | "Default metric\n") | |
3011 | { | |
3012 | if (rip) | |
3013 | { | |
3014 | rip->default_metric = atoi (argv[0]); | |
3015 | /* rip_update_default_metric (); */ | |
3016 | } | |
3017 | return CMD_SUCCESS; | |
3018 | } | |
3019 | ||
3020 | DEFUN (no_rip_default_metric, | |
3021 | no_rip_default_metric_cmd, | |
3022 | "no default-metric", | |
3023 | NO_STR | |
3024 | "Set a metric of redistribute routes\n" | |
3025 | "Default metric\n") | |
3026 | { | |
3027 | if (rip) | |
3028 | { | |
3029 | rip->default_metric = RIP_DEFAULT_METRIC_DEFAULT; | |
3030 | /* rip_update_default_metric (); */ | |
3031 | } | |
3032 | return CMD_SUCCESS; | |
3033 | } | |
3034 | ||
3035 | ALIAS (no_rip_default_metric, | |
3036 | no_rip_default_metric_val_cmd, | |
3037 | "no default-metric <1-16>", | |
3038 | NO_STR | |
3039 | "Set a metric of redistribute routes\n" | |
3040 | "Default metric\n") | |
3041 | ||
3042 | DEFUN (rip_timers, | |
3043 | rip_timers_cmd, | |
3044 | "timers basic <5-2147483647> <5-2147483647> <5-2147483647>", | |
3045 | "Adjust routing timers\n" | |
3046 | "Basic routing protocol update timers\n" | |
3047 | "Routing table update timer value in second. Default is 30.\n" | |
3048 | "Routing information timeout timer. Default is 180.\n" | |
3049 | "Garbage collection timer. Default is 120.\n") | |
3050 | { | |
3051 | unsigned long update; | |
3052 | unsigned long timeout; | |
3053 | unsigned long garbage; | |
3054 | char *endptr = NULL; | |
3055 | unsigned long RIP_TIMER_MAX = 2147483647; | |
3056 | unsigned long RIP_TIMER_MIN = 5; | |
3057 | ||
3058 | update = strtoul (argv[0], &endptr, 10); | |
3059 | if (update > RIP_TIMER_MAX || update < RIP_TIMER_MIN || *endptr != '\0') | |
3060 | { | |
3061 | vty_out (vty, "update timer value error%s", VTY_NEWLINE); | |
3062 | return CMD_WARNING; | |
3063 | } | |
3064 | ||
3065 | timeout = strtoul (argv[1], &endptr, 10); | |
3066 | if (timeout > RIP_TIMER_MAX || timeout < RIP_TIMER_MIN || *endptr != '\0') | |
3067 | { | |
3068 | vty_out (vty, "timeout timer value error%s", VTY_NEWLINE); | |
3069 | return CMD_WARNING; | |
3070 | } | |
3071 | ||
3072 | garbage = strtoul (argv[2], &endptr, 10); | |
3073 | if (garbage > RIP_TIMER_MAX || garbage < RIP_TIMER_MIN || *endptr != '\0') | |
3074 | { | |
3075 | vty_out (vty, "garbage timer value error%s", VTY_NEWLINE); | |
3076 | return CMD_WARNING; | |
3077 | } | |
3078 | ||
3079 | /* Set each timer value. */ | |
3080 | rip->update_time = update; | |
3081 | rip->timeout_time = timeout; | |
3082 | rip->garbage_time = garbage; | |
3083 | ||
3084 | /* Reset update timer thread. */ | |
3085 | rip_event (RIP_UPDATE_EVENT, 0); | |
3086 | ||
3087 | return CMD_SUCCESS; | |
3088 | } | |
3089 | ||
3090 | DEFUN (no_rip_timers, | |
3091 | no_rip_timers_cmd, | |
3092 | "no timers basic", | |
3093 | NO_STR | |
3094 | "Adjust routing timers\n" | |
3095 | "Basic routing protocol update timers\n") | |
3096 | { | |
3097 | /* Set each timer value to the default. */ | |
3098 | rip->update_time = RIP_UPDATE_TIMER_DEFAULT; | |
3099 | rip->timeout_time = RIP_TIMEOUT_TIMER_DEFAULT; | |
3100 | rip->garbage_time = RIP_GARBAGE_TIMER_DEFAULT; | |
3101 | ||
3102 | /* Reset update timer thread. */ | |
3103 | rip_event (RIP_UPDATE_EVENT, 0); | |
3104 | ||
3105 | return CMD_SUCCESS; | |
3106 | } | |
16705130 | 3107 | |
3108 | ALIAS (no_rip_timers, | |
3109 | no_rip_timers_val_cmd, | |
3110 | "no timers basic <0-65535> <0-65535> <0-65535>", | |
3111 | NO_STR | |
3112 | "Adjust routing timers\n" | |
3113 | "Basic routing protocol update timers\n" | |
3114 | "Routing table update timer value in second. Default is 30.\n" | |
3115 | "Routing information timeout timer. Default is 180.\n" | |
3116 | "Garbage collection timer. Default is 120.\n") | |
3117 | ||
718e3744 | 3118 | \f |
3119 | struct route_table *rip_distance_table; | |
3120 | ||
3121 | struct rip_distance | |
3122 | { | |
3123 | /* Distance value for the IP source prefix. */ | |
3124 | u_char distance; | |
3125 | ||
3126 | /* Name of the access-list to be matched. */ | |
3127 | char *access_list; | |
3128 | }; | |
3129 | ||
dc63bfd4 | 3130 | static struct rip_distance * |
216565ab | 3131 | rip_distance_new (void) |
718e3744 | 3132 | { |
3133 | struct rip_distance *new; | |
3134 | new = XMALLOC (MTYPE_RIP_DISTANCE, sizeof (struct rip_distance)); | |
3135 | memset (new, 0, sizeof (struct rip_distance)); | |
3136 | return new; | |
3137 | } | |
3138 | ||
dc63bfd4 | 3139 | static void |
718e3744 | 3140 | rip_distance_free (struct rip_distance *rdistance) |
3141 | { | |
3142 | XFREE (MTYPE_RIP_DISTANCE, rdistance); | |
3143 | } | |
3144 | ||
dc63bfd4 | 3145 | static int |
98b718a9 | 3146 | rip_distance_set (struct vty *vty, const char *distance_str, const char *ip_str, |
3147 | const char *access_list_str) | |
718e3744 | 3148 | { |
3149 | int ret; | |
3150 | struct prefix_ipv4 p; | |
3151 | u_char distance; | |
3152 | struct route_node *rn; | |
3153 | struct rip_distance *rdistance; | |
3154 | ||
3155 | ret = str2prefix_ipv4 (ip_str, &p); | |
3156 | if (ret == 0) | |
3157 | { | |
3158 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); | |
3159 | return CMD_WARNING; | |
3160 | } | |
3161 | ||
3162 | distance = atoi (distance_str); | |
3163 | ||
3164 | /* Get RIP distance node. */ | |
3165 | rn = route_node_get (rip_distance_table, (struct prefix *) &p); | |
3166 | if (rn->info) | |
3167 | { | |
3168 | rdistance = rn->info; | |
3169 | route_unlock_node (rn); | |
3170 | } | |
3171 | else | |
3172 | { | |
3173 | rdistance = rip_distance_new (); | |
3174 | rn->info = rdistance; | |
3175 | } | |
3176 | ||
3177 | /* Set distance value. */ | |
3178 | rdistance->distance = distance; | |
3179 | ||
3180 | /* Reset access-list configuration. */ | |
3181 | if (rdistance->access_list) | |
3182 | { | |
3183 | free (rdistance->access_list); | |
3184 | rdistance->access_list = NULL; | |
3185 | } | |
3186 | if (access_list_str) | |
3187 | rdistance->access_list = strdup (access_list_str); | |
3188 | ||
3189 | return CMD_SUCCESS; | |
3190 | } | |
3191 | ||
dc63bfd4 | 3192 | static int |
98b718a9 | 3193 | rip_distance_unset (struct vty *vty, const char *distance_str, |
3194 | const char *ip_str, const char *access_list_str) | |
718e3744 | 3195 | { |
3196 | int ret; | |
3197 | struct prefix_ipv4 p; | |
3198 | u_char distance; | |
3199 | struct route_node *rn; | |
3200 | struct rip_distance *rdistance; | |
3201 | ||
3202 | ret = str2prefix_ipv4 (ip_str, &p); | |
3203 | if (ret == 0) | |
3204 | { | |
3205 | vty_out (vty, "Malformed prefix%s", VTY_NEWLINE); | |
3206 | return CMD_WARNING; | |
3207 | } | |
3208 | ||
3209 | distance = atoi (distance_str); | |
3210 | ||
3211 | rn = route_node_lookup (rip_distance_table, (struct prefix *)&p); | |
3212 | if (! rn) | |
3213 | { | |
3214 | vty_out (vty, "Can't find specified prefix%s", VTY_NEWLINE); | |
3215 | return CMD_WARNING; | |
3216 | } | |
3217 | ||
3218 | rdistance = rn->info; | |
3219 | ||
3220 | if (rdistance->access_list) | |
3221 | free (rdistance->access_list); | |
3222 | rip_distance_free (rdistance); | |
3223 | ||
3224 | rn->info = NULL; | |
3225 | route_unlock_node (rn); | |
3226 | route_unlock_node (rn); | |
3227 | ||
3228 | return CMD_SUCCESS; | |
3229 | } | |
3230 | ||
dc63bfd4 | 3231 | static void |
216565ab | 3232 | rip_distance_reset (void) |
718e3744 | 3233 | { |
3234 | struct route_node *rn; | |
3235 | struct rip_distance *rdistance; | |
3236 | ||
3237 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3238 | if ((rdistance = rn->info) != NULL) | |
3239 | { | |
3240 | if (rdistance->access_list) | |
3241 | free (rdistance->access_list); | |
3242 | rip_distance_free (rdistance); | |
3243 | rn->info = NULL; | |
3244 | route_unlock_node (rn); | |
3245 | } | |
3246 | } | |
3247 | ||
3248 | /* Apply RIP information to distance method. */ | |
3249 | u_char | |
3250 | rip_distance_apply (struct rip_info *rinfo) | |
3251 | { | |
3252 | struct route_node *rn; | |
3253 | struct prefix_ipv4 p; | |
3254 | struct rip_distance *rdistance; | |
3255 | struct access_list *alist; | |
3256 | ||
3257 | if (! rip) | |
3258 | return 0; | |
3259 | ||
3260 | memset (&p, 0, sizeof (struct prefix_ipv4)); | |
3261 | p.family = AF_INET; | |
3262 | p.prefix = rinfo->from; | |
3263 | p.prefixlen = IPV4_MAX_BITLEN; | |
3264 | ||
3265 | /* Check source address. */ | |
3266 | rn = route_node_match (rip_distance_table, (struct prefix *) &p); | |
3267 | if (rn) | |
3268 | { | |
3269 | rdistance = rn->info; | |
3270 | route_unlock_node (rn); | |
3271 | ||
3272 | if (rdistance->access_list) | |
3273 | { | |
3274 | alist = access_list_lookup (AFI_IP, rdistance->access_list); | |
3275 | if (alist == NULL) | |
3276 | return 0; | |
3277 | if (access_list_apply (alist, &rinfo->rp->p) == FILTER_DENY) | |
3278 | return 0; | |
3279 | ||
3280 | return rdistance->distance; | |
3281 | } | |
3282 | else | |
3283 | return rdistance->distance; | |
3284 | } | |
3285 | ||
3286 | if (rip->distance) | |
3287 | return rip->distance; | |
3288 | ||
3289 | return 0; | |
3290 | } | |
3291 | ||
dc63bfd4 | 3292 | static void |
718e3744 | 3293 | rip_distance_show (struct vty *vty) |
3294 | { | |
3295 | struct route_node *rn; | |
3296 | struct rip_distance *rdistance; | |
3297 | int header = 1; | |
3298 | char buf[BUFSIZ]; | |
3299 | ||
3300 | vty_out (vty, " Distance: (default is %d)%s", | |
3301 | rip->distance ? rip->distance :ZEBRA_RIP_DISTANCE_DEFAULT, | |
3302 | VTY_NEWLINE); | |
3303 | ||
3304 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3305 | if ((rdistance = rn->info) != NULL) | |
3306 | { | |
3307 | if (header) | |
3308 | { | |
3309 | vty_out (vty, " Address Distance List%s", | |
3310 | VTY_NEWLINE); | |
3311 | header = 0; | |
3312 | } | |
3313 | sprintf (buf, "%s/%d", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen); | |
3314 | vty_out (vty, " %-20s %4d %s%s", | |
3315 | buf, rdistance->distance, | |
3316 | rdistance->access_list ? rdistance->access_list : "", | |
3317 | VTY_NEWLINE); | |
3318 | } | |
3319 | } | |
3320 | ||
3321 | DEFUN (rip_distance, | |
3322 | rip_distance_cmd, | |
3323 | "distance <1-255>", | |
3324 | "Administrative distance\n" | |
3325 | "Distance value\n") | |
3326 | { | |
3327 | rip->distance = atoi (argv[0]); | |
3328 | return CMD_SUCCESS; | |
3329 | } | |
3330 | ||
3331 | DEFUN (no_rip_distance, | |
3332 | no_rip_distance_cmd, | |
3333 | "no distance <1-255>", | |
3334 | NO_STR | |
3335 | "Administrative distance\n" | |
3336 | "Distance value\n") | |
3337 | { | |
3338 | rip->distance = 0; | |
3339 | return CMD_SUCCESS; | |
3340 | } | |
3341 | ||
3342 | DEFUN (rip_distance_source, | |
3343 | rip_distance_source_cmd, | |
3344 | "distance <1-255> A.B.C.D/M", | |
3345 | "Administrative distance\n" | |
3346 | "Distance value\n" | |
3347 | "IP source prefix\n") | |
3348 | { | |
3349 | rip_distance_set (vty, argv[0], argv[1], NULL); | |
3350 | return CMD_SUCCESS; | |
3351 | } | |
3352 | ||
3353 | DEFUN (no_rip_distance_source, | |
3354 | no_rip_distance_source_cmd, | |
3355 | "no distance <1-255> A.B.C.D/M", | |
3356 | NO_STR | |
3357 | "Administrative distance\n" | |
3358 | "Distance value\n" | |
3359 | "IP source prefix\n") | |
3360 | { | |
3361 | rip_distance_unset (vty, argv[0], argv[1], NULL); | |
3362 | return CMD_SUCCESS; | |
3363 | } | |
3364 | ||
3365 | DEFUN (rip_distance_source_access_list, | |
3366 | rip_distance_source_access_list_cmd, | |
3367 | "distance <1-255> A.B.C.D/M WORD", | |
3368 | "Administrative distance\n" | |
3369 | "Distance value\n" | |
3370 | "IP source prefix\n" | |
3371 | "Access list name\n") | |
3372 | { | |
3373 | rip_distance_set (vty, argv[0], argv[1], argv[2]); | |
3374 | return CMD_SUCCESS; | |
3375 | } | |
3376 | ||
3377 | DEFUN (no_rip_distance_source_access_list, | |
3378 | no_rip_distance_source_access_list_cmd, | |
3379 | "no distance <1-255> A.B.C.D/M WORD", | |
3380 | NO_STR | |
3381 | "Administrative distance\n" | |
3382 | "Distance value\n" | |
3383 | "IP source prefix\n" | |
3384 | "Access list name\n") | |
3385 | { | |
3386 | rip_distance_unset (vty, argv[0], argv[1], argv[2]); | |
3387 | return CMD_SUCCESS; | |
3388 | } | |
3389 | \f | |
3390 | /* Print out routes update time. */ | |
dc63bfd4 | 3391 | static void |
718e3744 | 3392 | rip_vty_out_uptime (struct vty *vty, struct rip_info *rinfo) |
3393 | { | |
3394 | struct timeval timer_now; | |
3395 | time_t clock; | |
3396 | struct tm *tm; | |
3397 | #define TIME_BUF 25 | |
3398 | char timebuf [TIME_BUF]; | |
3399 | struct thread *thread; | |
3400 | ||
3401 | gettimeofday (&timer_now, NULL); | |
3402 | ||
3403 | if ((thread = rinfo->t_timeout) != NULL) | |
3404 | { | |
3405 | clock = thread->u.sands.tv_sec - timer_now.tv_sec; | |
3406 | tm = gmtime (&clock); | |
3407 | strftime (timebuf, TIME_BUF, "%M:%S", tm); | |
3408 | vty_out (vty, "%5s", timebuf); | |
3409 | } | |
3410 | else if ((thread = rinfo->t_garbage_collect) != NULL) | |
3411 | { | |
3412 | clock = thread->u.sands.tv_sec - timer_now.tv_sec; | |
3413 | tm = gmtime (&clock); | |
3414 | strftime (timebuf, TIME_BUF, "%M:%S", tm); | |
3415 | vty_out (vty, "%5s", timebuf); | |
3416 | } | |
3417 | } | |
3418 | ||
dc63bfd4 | 3419 | static const char * |
718e3744 | 3420 | rip_route_type_print (int sub_type) |
3421 | { | |
3422 | switch (sub_type) | |
3423 | { | |
3424 | case RIP_ROUTE_RTE: | |
3425 | return "n"; | |
3426 | case RIP_ROUTE_STATIC: | |
3427 | return "s"; | |
3428 | case RIP_ROUTE_DEFAULT: | |
3429 | return "d"; | |
3430 | case RIP_ROUTE_REDISTRIBUTE: | |
3431 | return "r"; | |
3432 | case RIP_ROUTE_INTERFACE: | |
3433 | return "i"; | |
3434 | default: | |
3435 | return "?"; | |
3436 | } | |
3437 | } | |
3438 | ||
3439 | DEFUN (show_ip_rip, | |
3440 | show_ip_rip_cmd, | |
3441 | "show ip rip", | |
3442 | SHOW_STR | |
3443 | IP_STR | |
3444 | "Show RIP routes\n") | |
3445 | { | |
3446 | struct route_node *np; | |
3447 | struct rip_info *rinfo; | |
3448 | ||
3449 | if (! rip) | |
3450 | return CMD_SUCCESS; | |
3451 | ||
16705130 | 3452 | vty_out (vty, "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP%s" |
3453 | "Sub-codes:%s" | |
3454 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,%s" | |
718e3744 | 3455 | " (i) - interface%s%s" |
a1455d86 | 3456 | " Network Next Hop Metric From Tag Time%s", |
16705130 | 3457 | VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE, VTY_NEWLINE); |
718e3744 | 3458 | |
3459 | for (np = route_top (rip->table); np; np = route_next (np)) | |
3460 | if ((rinfo = np->info) != NULL) | |
3461 | { | |
3462 | int len; | |
3463 | ||
f52d13cb | 3464 | len = vty_out (vty, "%c(%s) %s/%d", |
718e3744 | 3465 | /* np->lock, For debugging. */ |
f52d13cb | 3466 | zebra_route_char(rinfo->type), |
718e3744 | 3467 | rip_route_type_print (rinfo->sub_type), |
3468 | inet_ntoa (np->p.u.prefix4), np->p.prefixlen); | |
3469 | ||
a1455d86 | 3470 | len = 24 - len; |
718e3744 | 3471 | |
3472 | if (len > 0) | |
3473 | vty_out (vty, "%*s", len, " "); | |
3474 | ||
3475 | if (rinfo->nexthop.s_addr) | |
3476 | vty_out (vty, "%-20s %2d ", inet_ntoa (rinfo->nexthop), | |
3477 | rinfo->metric); | |
3478 | else | |
3479 | vty_out (vty, "0.0.0.0 %2d ", rinfo->metric); | |
3480 | ||
3481 | /* Route which exist in kernel routing table. */ | |
3482 | if ((rinfo->type == ZEBRA_ROUTE_RIP) && | |
3483 | (rinfo->sub_type == RIP_ROUTE_RTE)) | |
3484 | { | |
3485 | vty_out (vty, "%-15s ", inet_ntoa (rinfo->from)); | |
16705130 | 3486 | vty_out (vty, "%3d ", rinfo->tag); |
718e3744 | 3487 | rip_vty_out_uptime (vty, rinfo); |
3488 | } | |
3489 | else if (rinfo->metric == RIP_METRIC_INFINITY) | |
3490 | { | |
3491 | vty_out (vty, "self "); | |
16705130 | 3492 | vty_out (vty, "%3d ", rinfo->tag); |
718e3744 | 3493 | rip_vty_out_uptime (vty, rinfo); |
3494 | } | |
3495 | else | |
16705130 | 3496 | { |
fbf5d033 | 3497 | if (rinfo->external_metric) |
3498 | { | |
3499 | len = vty_out (vty, "self (%s:%d)", | |
f52d13cb | 3500 | zebra_route_string(rinfo->type), |
fbf5d033 | 3501 | rinfo->external_metric); |
3502 | len = 16 - len; | |
3503 | if (len > 0) | |
3504 | vty_out (vty, "%*s", len, " "); | |
3505 | } | |
3506 | else | |
3507 | vty_out (vty, "self "); | |
16705130 | 3508 | vty_out (vty, "%3d", rinfo->tag); |
3509 | } | |
718e3744 | 3510 | |
3511 | vty_out (vty, "%s", VTY_NEWLINE); | |
3512 | } | |
3513 | return CMD_SUCCESS; | |
3514 | } | |
3515 | ||
3516 | /* Return next event time. */ | |
dc63bfd4 | 3517 | static int |
718e3744 | 3518 | rip_next_thread_timer (struct thread *thread) |
3519 | { | |
3520 | struct timeval timer_now; | |
3521 | ||
3522 | gettimeofday (&timer_now, NULL); | |
3523 | ||
3524 | return thread->u.sands.tv_sec - timer_now.tv_sec; | |
3525 | } | |
3526 | ||
16705130 | 3527 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3528 | DEFUN (show_ip_rip_status, | |
3529 | show_ip_rip_status_cmd, | |
3530 | "show ip rip status", | |
718e3744 | 3531 | SHOW_STR |
3532 | IP_STR | |
16705130 | 3533 | "Show RIP routes\n" |
718e3744 | 3534 | "IP routing protocol process parameters and statistics\n") |
3535 | { | |
52dc7ee6 | 3536 | struct listnode *node; |
718e3744 | 3537 | struct interface *ifp; |
3538 | struct rip_interface *ri; | |
3539 | extern struct message ri_version_msg[]; | |
8a676be3 | 3540 | const char *send_version; |
3541 | const char *receive_version; | |
718e3744 | 3542 | |
3543 | if (! rip) | |
3544 | return CMD_SUCCESS; | |
3545 | ||
3546 | vty_out (vty, "Routing Protocol is \"rip\"%s", VTY_NEWLINE); | |
3547 | vty_out (vty, " Sending updates every %ld seconds with +/-50%%,", | |
3548 | rip->update_time); | |
3549 | vty_out (vty, " next due in %d seconds%s", | |
3550 | rip_next_thread_timer (rip->t_update), | |
3551 | VTY_NEWLINE); | |
3552 | vty_out (vty, " Timeout after %ld seconds,", rip->timeout_time); | |
3553 | vty_out (vty, " garbage collect after %ld seconds%s", rip->garbage_time, | |
3554 | VTY_NEWLINE); | |
3555 | ||
3556 | /* Filtering status show. */ | |
3557 | config_show_distribute (vty); | |
3558 | ||
3559 | /* Default metric information. */ | |
3560 | vty_out (vty, " Default redistribution metric is %d%s", | |
3561 | rip->default_metric, VTY_NEWLINE); | |
3562 | ||
3563 | /* Redistribute information. */ | |
3564 | vty_out (vty, " Redistributing:"); | |
3565 | config_write_rip_redistribute (vty, 0); | |
3566 | vty_out (vty, "%s", VTY_NEWLINE); | |
3567 | ||
f38a471c | 3568 | vty_out (vty, " Default version control: send version %s,", |
3569 | lookup(ri_version_msg,rip->version_send)); | |
3570 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3571 | vty_out (vty, " receive any version %s", VTY_NEWLINE); | |
3572 | else | |
3573 | vty_out (vty, " receive version %s %s", | |
3574 | lookup(ri_version_msg,rip->version_recv), VTY_NEWLINE); | |
718e3744 | 3575 | |
3576 | vty_out (vty, " Interface Send Recv Key-chain%s", VTY_NEWLINE); | |
3577 | ||
1eb8ef25 | 3578 | for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp)) |
718e3744 | 3579 | { |
718e3744 | 3580 | ri = ifp->info; |
3581 | ||
3582 | if (ri->enable_network || ri->enable_interface) | |
3583 | { | |
3584 | if (ri->ri_send == RI_RIP_UNSPEC) | |
f38a471c | 3585 | send_version = lookup (ri_version_msg, rip->version_send); |
718e3744 | 3586 | else |
3587 | send_version = lookup (ri_version_msg, ri->ri_send); | |
3588 | ||
3589 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
f38a471c | 3590 | receive_version = lookup (ri_version_msg, rip->version_recv); |
718e3744 | 3591 | else |
3592 | receive_version = lookup (ri_version_msg, ri->ri_receive); | |
3593 | ||
3594 | vty_out (vty, " %-17s%-3s %-3s %s%s", ifp->name, | |
3595 | send_version, | |
3596 | receive_version, | |
3597 | ri->key_chain ? ri->key_chain : "", | |
3598 | VTY_NEWLINE); | |
3599 | } | |
3600 | } | |
3601 | ||
3602 | vty_out (vty, " Routing for Networks:%s", VTY_NEWLINE); | |
3603 | config_write_rip_network (vty, 0); | |
3604 | ||
4aaff3f8 | 3605 | { |
3606 | int found_passive = 0; | |
1eb8ef25 | 3607 | for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp)) |
4aaff3f8 | 3608 | { |
4aaff3f8 | 3609 | ri = ifp->info; |
3610 | ||
3611 | if ((ri->enable_network || ri->enable_interface) && ri->passive) | |
3612 | { | |
3613 | if (!found_passive) | |
3614 | { | |
3615 | vty_out (vty, " Passive Interface(s):%s", VTY_NEWLINE); | |
3616 | found_passive = 1; | |
3617 | } | |
3618 | vty_out (vty, " %s%s", ifp->name, VTY_NEWLINE); | |
3619 | } | |
3620 | } | |
3621 | } | |
3622 | ||
718e3744 | 3623 | vty_out (vty, " Routing Information Sources:%s", VTY_NEWLINE); |
3624 | vty_out (vty, " Gateway BadPackets BadRoutes Distance Last Update%s", VTY_NEWLINE); | |
3625 | rip_peer_display (vty); | |
3626 | ||
3627 | rip_distance_show (vty); | |
3628 | ||
3629 | return CMD_SUCCESS; | |
3630 | } | |
3631 | ||
3632 | /* RIP configuration write function. */ | |
dc63bfd4 | 3633 | static int |
718e3744 | 3634 | config_write_rip (struct vty *vty) |
3635 | { | |
3636 | int write = 0; | |
3637 | struct route_node *rn; | |
3638 | struct rip_distance *rdistance; | |
3639 | ||
3640 | if (rip) | |
3641 | { | |
3642 | /* Router RIP statement. */ | |
3643 | vty_out (vty, "router rip%s", VTY_NEWLINE); | |
3644 | write++; | |
3645 | ||
3646 | /* RIP version statement. Default is RIP version 2. */ | |
f38a471c | 3647 | if (rip->version_send != RI_RIP_VERSION_2 |
3648 | || rip->version_recv != RI_RIP_VERSION_1_AND_2) | |
3649 | vty_out (vty, " version %d%s", rip->version_send, | |
718e3744 | 3650 | VTY_NEWLINE); |
3651 | ||
3652 | /* RIP timer configuration. */ | |
3653 | if (rip->update_time != RIP_UPDATE_TIMER_DEFAULT | |
3654 | || rip->timeout_time != RIP_TIMEOUT_TIMER_DEFAULT | |
3655 | || rip->garbage_time != RIP_GARBAGE_TIMER_DEFAULT) | |
3656 | vty_out (vty, " timers basic %lu %lu %lu%s", | |
3657 | rip->update_time, | |
3658 | rip->timeout_time, | |
3659 | rip->garbage_time, | |
3660 | VTY_NEWLINE); | |
3661 | ||
3662 | /* Default information configuration. */ | |
3663 | if (rip->default_information) | |
3664 | { | |
3665 | if (rip->default_information_route_map) | |
3666 | vty_out (vty, " default-information originate route-map %s%s", | |
3667 | rip->default_information_route_map, VTY_NEWLINE); | |
3668 | else | |
3669 | vty_out (vty, " default-information originate%s", | |
3670 | VTY_NEWLINE); | |
3671 | } | |
3672 | ||
3673 | /* Redistribute configuration. */ | |
3674 | config_write_rip_redistribute (vty, 1); | |
3675 | ||
3676 | /* RIP offset-list configuration. */ | |
3677 | config_write_rip_offset_list (vty); | |
3678 | ||
3679 | /* RIP enabled network and interface configuration. */ | |
3680 | config_write_rip_network (vty, 1); | |
3681 | ||
3682 | /* RIP default metric configuration */ | |
3683 | if (rip->default_metric != RIP_DEFAULT_METRIC_DEFAULT) | |
3684 | vty_out (vty, " default-metric %d%s", | |
3685 | rip->default_metric, VTY_NEWLINE); | |
3686 | ||
3687 | /* Distribute configuration. */ | |
3688 | write += config_write_distribute (vty); | |
3689 | ||
16705130 | 3690 | /* Interface routemap configuration */ |
3691 | write += config_write_if_rmap (vty); | |
3692 | ||
718e3744 | 3693 | /* Distance configuration. */ |
3694 | if (rip->distance) | |
3695 | vty_out (vty, " distance %d%s", rip->distance, VTY_NEWLINE); | |
3696 | ||
3697 | /* RIP source IP prefix distance configuration. */ | |
3698 | for (rn = route_top (rip_distance_table); rn; rn = route_next (rn)) | |
3699 | if ((rdistance = rn->info) != NULL) | |
3700 | vty_out (vty, " distance %d %s/%d %s%s", rdistance->distance, | |
3701 | inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
3702 | rdistance->access_list ? rdistance->access_list : "", | |
3703 | VTY_NEWLINE); | |
3704 | ||
3705 | /* RIP static route configuration. */ | |
3706 | for (rn = route_top (rip->route); rn; rn = route_next (rn)) | |
3707 | if (rn->info) | |
3708 | vty_out (vty, " route %s/%d%s", | |
3709 | inet_ntoa (rn->p.u.prefix4), | |
3710 | rn->p.prefixlen, | |
3711 | VTY_NEWLINE); | |
3712 | ||
3713 | } | |
3714 | return write; | |
3715 | } | |
3716 | ||
3717 | /* RIP node structure. */ | |
3718 | struct cmd_node rip_node = | |
3719 | { | |
3720 | RIP_NODE, | |
3721 | "%s(config-router)# ", | |
3722 | 1 | |
3723 | }; | |
3724 | \f | |
3725 | /* Distribute-list update functions. */ | |
dc63bfd4 | 3726 | static void |
718e3744 | 3727 | rip_distribute_update (struct distribute *dist) |
3728 | { | |
3729 | struct interface *ifp; | |
3730 | struct rip_interface *ri; | |
3731 | struct access_list *alist; | |
3732 | struct prefix_list *plist; | |
3733 | ||
3734 | if (! dist->ifname) | |
3735 | return; | |
3736 | ||
3737 | ifp = if_lookup_by_name (dist->ifname); | |
3738 | if (ifp == NULL) | |
3739 | return; | |
3740 | ||
3741 | ri = ifp->info; | |
3742 | ||
3743 | if (dist->list[DISTRIBUTE_IN]) | |
3744 | { | |
3745 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_IN]); | |
3746 | if (alist) | |
3747 | ri->list[RIP_FILTER_IN] = alist; | |
3748 | else | |
3749 | ri->list[RIP_FILTER_IN] = NULL; | |
3750 | } | |
3751 | else | |
3752 | ri->list[RIP_FILTER_IN] = NULL; | |
3753 | ||
3754 | if (dist->list[DISTRIBUTE_OUT]) | |
3755 | { | |
3756 | alist = access_list_lookup (AFI_IP, dist->list[DISTRIBUTE_OUT]); | |
3757 | if (alist) | |
3758 | ri->list[RIP_FILTER_OUT] = alist; | |
3759 | else | |
3760 | ri->list[RIP_FILTER_OUT] = NULL; | |
3761 | } | |
3762 | else | |
3763 | ri->list[RIP_FILTER_OUT] = NULL; | |
3764 | ||
3765 | if (dist->prefix[DISTRIBUTE_IN]) | |
3766 | { | |
3767 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_IN]); | |
3768 | if (plist) | |
3769 | ri->prefix[RIP_FILTER_IN] = plist; | |
3770 | else | |
3771 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3772 | } | |
3773 | else | |
3774 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3775 | ||
3776 | if (dist->prefix[DISTRIBUTE_OUT]) | |
3777 | { | |
3778 | plist = prefix_list_lookup (AFI_IP, dist->prefix[DISTRIBUTE_OUT]); | |
3779 | if (plist) | |
3780 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3781 | else | |
3782 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3783 | } | |
3784 | else | |
3785 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3786 | } | |
3787 | ||
3788 | void | |
3789 | rip_distribute_update_interface (struct interface *ifp) | |
3790 | { | |
3791 | struct distribute *dist; | |
3792 | ||
3793 | dist = distribute_lookup (ifp->name); | |
3794 | if (dist) | |
3795 | rip_distribute_update (dist); | |
3796 | } | |
3797 | ||
3798 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3799 | /* ARGSUSED */ |
dc63bfd4 | 3800 | static void |
02ff83c5 | 3801 | rip_distribute_update_all (struct prefix_list *notused) |
718e3744 | 3802 | { |
3803 | struct interface *ifp; | |
1eb8ef25 | 3804 | struct listnode *node, *nnode; |
718e3744 | 3805 | |
1eb8ef25 | 3806 | for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp)) |
3807 | rip_distribute_update_interface (ifp); | |
718e3744 | 3808 | } |
11dde9c2 | 3809 | /* ARGSUSED */ |
dc63bfd4 | 3810 | static void |
11dde9c2 | 3811 | rip_distribute_update_all_wrapper(struct access_list *notused) |
3812 | { | |
02ff83c5 | 3813 | rip_distribute_update_all(NULL); |
11dde9c2 | 3814 | } |
718e3744 | 3815 | \f |
3816 | /* Delete all added rip route. */ | |
3817 | void | |
216565ab | 3818 | rip_clean (void) |
718e3744 | 3819 | { |
3820 | int i; | |
3821 | struct route_node *rp; | |
3822 | struct rip_info *rinfo; | |
3823 | ||
3824 | if (rip) | |
3825 | { | |
3826 | /* Clear RIP routes */ | |
3827 | for (rp = route_top (rip->table); rp; rp = route_next (rp)) | |
3828 | if ((rinfo = rp->info) != NULL) | |
3829 | { | |
3830 | if (rinfo->type == ZEBRA_ROUTE_RIP && | |
3831 | rinfo->sub_type == RIP_ROUTE_RTE) | |
3832 | rip_zebra_ipv4_delete ((struct prefix_ipv4 *)&rp->p, | |
3833 | &rinfo->nexthop, rinfo->metric); | |
3834 | ||
3835 | RIP_TIMER_OFF (rinfo->t_timeout); | |
3836 | RIP_TIMER_OFF (rinfo->t_garbage_collect); | |
3837 | ||
3838 | rp->info = NULL; | |
3839 | route_unlock_node (rp); | |
3840 | ||
3841 | rip_info_free (rinfo); | |
3842 | } | |
3843 | ||
3844 | /* Cancel RIP related timers. */ | |
3845 | RIP_TIMER_OFF (rip->t_update); | |
3846 | RIP_TIMER_OFF (rip->t_triggered_update); | |
3847 | RIP_TIMER_OFF (rip->t_triggered_interval); | |
3848 | ||
3849 | /* Cancel read thread. */ | |
3850 | if (rip->t_read) | |
3851 | { | |
3852 | thread_cancel (rip->t_read); | |
3853 | rip->t_read = NULL; | |
3854 | } | |
3855 | ||
3856 | /* Close RIP socket. */ | |
3857 | if (rip->sock >= 0) | |
3858 | { | |
3859 | close (rip->sock); | |
3860 | rip->sock = -1; | |
3861 | } | |
3862 | ||
3863 | /* Static RIP route configuration. */ | |
3864 | for (rp = route_top (rip->route); rp; rp = route_next (rp)) | |
3865 | if (rp->info) | |
3866 | { | |
3867 | rp->info = NULL; | |
3868 | route_unlock_node (rp); | |
3869 | } | |
3870 | ||
3871 | /* RIP neighbor configuration. */ | |
3872 | for (rp = route_top (rip->neighbor); rp; rp = route_next (rp)) | |
3873 | if (rp->info) | |
3874 | { | |
3875 | rp->info = NULL; | |
3876 | route_unlock_node (rp); | |
3877 | } | |
3878 | ||
3879 | /* Redistribute related clear. */ | |
3880 | if (rip->default_information_route_map) | |
3881 | free (rip->default_information_route_map); | |
3882 | ||
3883 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
3884 | if (rip->route_map[i].name) | |
3885 | free (rip->route_map[i].name); | |
3886 | ||
3887 | XFREE (MTYPE_ROUTE_TABLE, rip->table); | |
3888 | XFREE (MTYPE_ROUTE_TABLE, rip->route); | |
3889 | XFREE (MTYPE_ROUTE_TABLE, rip->neighbor); | |
3890 | ||
3891 | XFREE (MTYPE_RIP, rip); | |
3892 | rip = NULL; | |
3893 | } | |
3894 | ||
3895 | rip_clean_network (); | |
4aaff3f8 | 3896 | rip_passive_nondefault_clean (); |
718e3744 | 3897 | rip_offset_clean (); |
3898 | rip_interface_clean (); | |
3899 | rip_distance_reset (); | |
3900 | rip_redistribute_clean (); | |
3901 | } | |
3902 | ||
3903 | /* Reset all values to the default settings. */ | |
3904 | void | |
216565ab | 3905 | rip_reset (void) |
718e3744 | 3906 | { |
3907 | /* Reset global counters. */ | |
3908 | rip_global_route_changes = 0; | |
3909 | rip_global_queries = 0; | |
3910 | ||
3911 | /* Call ripd related reset functions. */ | |
3912 | rip_debug_reset (); | |
3913 | rip_route_map_reset (); | |
3914 | ||
3915 | /* Call library reset functions. */ | |
3916 | vty_reset (); | |
3917 | access_list_reset (); | |
3918 | prefix_list_reset (); | |
3919 | ||
3920 | distribute_list_reset (); | |
3921 | ||
3922 | rip_interface_reset (); | |
3923 | rip_distance_reset (); | |
3924 | ||
3925 | rip_zclient_reset (); | |
3926 | } | |
3927 | ||
dc63bfd4 | 3928 | static void |
16705130 | 3929 | rip_if_rmap_update (struct if_rmap *if_rmap) |
3930 | { | |
3931 | struct interface *ifp; | |
3932 | struct rip_interface *ri; | |
3933 | struct route_map *rmap; | |
3934 | ||
3935 | ifp = if_lookup_by_name (if_rmap->ifname); | |
3936 | if (ifp == NULL) | |
3937 | return; | |
3938 | ||
3939 | ri = ifp->info; | |
3940 | ||
3941 | if (if_rmap->routemap[IF_RMAP_IN]) | |
3942 | { | |
3943 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_IN]); | |
3944 | if (rmap) | |
3945 | ri->routemap[IF_RMAP_IN] = rmap; | |
3946 | else | |
3947 | ri->routemap[IF_RMAP_IN] = NULL; | |
3948 | } | |
3949 | else | |
3950 | ri->routemap[RIP_FILTER_IN] = NULL; | |
3951 | ||
3952 | if (if_rmap->routemap[IF_RMAP_OUT]) | |
3953 | { | |
3954 | rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_OUT]); | |
3955 | if (rmap) | |
3956 | ri->routemap[IF_RMAP_OUT] = rmap; | |
3957 | else | |
3958 | ri->routemap[IF_RMAP_OUT] = NULL; | |
3959 | } | |
3960 | else | |
3961 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
3962 | } | |
3963 | ||
3964 | void | |
3965 | rip_if_rmap_update_interface (struct interface *ifp) | |
3966 | { | |
3967 | struct if_rmap *if_rmap; | |
3968 | ||
3969 | if_rmap = if_rmap_lookup (ifp->name); | |
3970 | if (if_rmap) | |
3971 | rip_if_rmap_update (if_rmap); | |
3972 | } | |
3973 | ||
dc63bfd4 | 3974 | static void |
16705130 | 3975 | rip_routemap_update_redistribute (void) |
3976 | { | |
3977 | int i; | |
3978 | ||
3979 | if (rip) | |
3980 | { | |
3981 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
3982 | { | |
3983 | if (rip->route_map[i].name) | |
3984 | rip->route_map[i].map = | |
3985 | route_map_lookup_by_name (rip->route_map[i].name); | |
3986 | } | |
3987 | } | |
3988 | } | |
3989 | ||
11dde9c2 | 3990 | /* ARGSUSED */ |
dc63bfd4 | 3991 | static void |
98b718a9 | 3992 | rip_routemap_update (const char *notused) |
16705130 | 3993 | { |
3994 | struct interface *ifp; | |
1eb8ef25 | 3995 | struct listnode *node, *nnode; |
16705130 | 3996 | |
1eb8ef25 | 3997 | for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp)) |
3998 | rip_if_rmap_update_interface (ifp); | |
16705130 | 3999 | |
4000 | rip_routemap_update_redistribute (); | |
4001 | } | |
4002 | ||
718e3744 | 4003 | /* Allocate new rip structure and set default value. */ |
4004 | void | |
dc63bfd4 | 4005 | rip_init (void) |
718e3744 | 4006 | { |
4007 | /* Randomize for triggered update random(). */ | |
4008 | srand (time (NULL)); | |
4009 | ||
4010 | /* Install top nodes. */ | |
4011 | install_node (&rip_node, config_write_rip); | |
4012 | ||
4013 | /* Install rip commands. */ | |
4014 | install_element (VIEW_NODE, &show_ip_rip_cmd); | |
16705130 | 4015 | install_element (VIEW_NODE, &show_ip_rip_status_cmd); |
718e3744 | 4016 | install_element (ENABLE_NODE, &show_ip_rip_cmd); |
16705130 | 4017 | install_element (ENABLE_NODE, &show_ip_rip_status_cmd); |
718e3744 | 4018 | install_element (CONFIG_NODE, &router_rip_cmd); |
4019 | install_element (CONFIG_NODE, &no_router_rip_cmd); | |
4020 | ||
4021 | install_default (RIP_NODE); | |
4022 | install_element (RIP_NODE, &rip_version_cmd); | |
4023 | install_element (RIP_NODE, &no_rip_version_cmd); | |
4024 | install_element (RIP_NODE, &no_rip_version_val_cmd); | |
4025 | install_element (RIP_NODE, &rip_default_metric_cmd); | |
4026 | install_element (RIP_NODE, &no_rip_default_metric_cmd); | |
4027 | install_element (RIP_NODE, &no_rip_default_metric_val_cmd); | |
4028 | install_element (RIP_NODE, &rip_timers_cmd); | |
4029 | install_element (RIP_NODE, &no_rip_timers_cmd); | |
16705130 | 4030 | install_element (RIP_NODE, &no_rip_timers_val_cmd); |
718e3744 | 4031 | install_element (RIP_NODE, &rip_route_cmd); |
4032 | install_element (RIP_NODE, &no_rip_route_cmd); | |
4033 | install_element (RIP_NODE, &rip_distance_cmd); | |
4034 | install_element (RIP_NODE, &no_rip_distance_cmd); | |
4035 | install_element (RIP_NODE, &rip_distance_source_cmd); | |
4036 | install_element (RIP_NODE, &no_rip_distance_source_cmd); | |
4037 | install_element (RIP_NODE, &rip_distance_source_access_list_cmd); | |
4038 | install_element (RIP_NODE, &no_rip_distance_source_access_list_cmd); | |
4039 | ||
4040 | /* Debug related init. */ | |
4041 | rip_debug_init (); | |
4042 | ||
718e3744 | 4043 | /* SNMP init. */ |
4044 | #ifdef HAVE_SNMP | |
4045 | rip_snmp_init (); | |
4046 | #endif /* HAVE_SNMP */ | |
4047 | ||
4048 | /* Access list install. */ | |
4049 | access_list_init (); | |
11dde9c2 | 4050 | access_list_add_hook (rip_distribute_update_all_wrapper); |
4051 | access_list_delete_hook (rip_distribute_update_all_wrapper); | |
718e3744 | 4052 | |
4053 | /* Prefix list initialize.*/ | |
4054 | prefix_list_init (); | |
4055 | prefix_list_add_hook (rip_distribute_update_all); | |
4056 | prefix_list_delete_hook (rip_distribute_update_all); | |
4057 | ||
4058 | /* Distribute list install. */ | |
4059 | distribute_list_init (RIP_NODE); | |
4060 | distribute_list_add_hook (rip_distribute_update); | |
4061 | distribute_list_delete_hook (rip_distribute_update); | |
4062 | ||
16705130 | 4063 | /* Route-map */ |
4064 | rip_route_map_init (); | |
4065 | rip_offset_init (); | |
4066 | ||
4067 | route_map_add_hook (rip_routemap_update); | |
4068 | route_map_delete_hook (rip_routemap_update); | |
4069 | ||
4070 | if_rmap_init (RIP_NODE); | |
4071 | if_rmap_hook_add (rip_if_rmap_update); | |
4072 | if_rmap_hook_delete (rip_if_rmap_update); | |
4073 | ||
718e3744 | 4074 | /* Distance control. */ |
4075 | rip_distance_table = route_table_init (); | |
4076 | } |