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718e3744 | 1 | /* RIP version 1 and 2. |
fbf5d033 | 2 | * Copyright (C) 2005 6WIND <alain.ritoux@6wind.com> |
718e3744 | 3 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro <kunihiro@zebra.org> |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
b2d7c082 | 24 | #include "vrf.h" |
718e3744 | 25 | #include "if.h" |
26 | #include "command.h" | |
27 | #include "prefix.h" | |
28 | #include "table.h" | |
29 | #include "thread.h" | |
30 | #include "memory.h" | |
31 | #include "log.h" | |
32 | #include "stream.h" | |
33 | #include "filter.h" | |
34 | #include "sockunion.h" | |
1af81933 | 35 | #include "sockopt.h" |
718e3744 | 36 | #include "routemap.h" |
16705130 | 37 | #include "if_rmap.h" |
718e3744 | 38 | #include "plist.h" |
39 | #include "distribute.h" | |
0513a271 | 40 | #ifdef CRYPTO_INTERNAL |
c1a03d47 | 41 | #include "md5.h" |
0513a271 | 42 | #endif |
718e3744 | 43 | #include "keychain.h" |
edd7c245 | 44 | #include "privs.h" |
77cbe4a1 | 45 | #include "lib_errors.h" |
8c9226c2 | 46 | #include "northbound_cli.h" |
718e3744 | 47 | |
48 | #include "ripd/ripd.h" | |
49 | #include "ripd/rip_debug.h" | |
518e377f | 50 | #include "ripd/rip_errors.h" |
ae7b826a | 51 | #include "ripd/rip_interface.h" |
718e3744 | 52 | |
0b3acf4f | 53 | /* UDP receive buffer size */ |
54 | #define RIP_UDP_RCV_BUF 41600 | |
55 | ||
814a2585 DL |
56 | DEFINE_MGROUP(RIPD, "ripd") |
57 | DEFINE_MTYPE_STATIC(RIPD, RIP, "RIP structure") | |
58 | DEFINE_MTYPE_STATIC(RIPD, RIP_VRF_NAME, "RIP VRF name") | |
59 | DEFINE_MTYPE_STATIC(RIPD, RIP_INFO, "RIP route info") | |
60 | DEFINE_MTYPE_STATIC(RIPD, RIP_DISTANCE, "RIP distance") | |
61 | ||
718e3744 | 62 | /* Prototypes. */ |
d62a17ae | 63 | static void rip_output_process(struct connected *, struct sockaddr_in *, int, |
d7c0a89a | 64 | uint8_t); |
d62a17ae | 65 | static int rip_triggered_update(struct thread *); |
66 | static int rip_update_jitter(unsigned long); | |
2826309c RW |
67 | static void rip_distance_table_node_cleanup(struct route_table *table, |
68 | struct route_node *node); | |
ae7b826a RW |
69 | static void rip_instance_enable(struct rip *rip, struct vrf *vrf, int sock); |
70 | static void rip_instance_disable(struct rip *rip); | |
6b0655a2 | 71 | |
03a38493 PG |
72 | static void rip_distribute_update(struct distribute_ctx *ctx, |
73 | struct distribute *dist); | |
74 | ||
4b23867c PG |
75 | static void rip_if_rmap_update(struct if_rmap_ctx *ctx, |
76 | struct if_rmap *if_rmap); | |
77 | ||
718e3744 | 78 | /* RIP output routes type. */ |
d62a17ae | 79 | enum { rip_all_route, rip_changed_route }; |
6b0655a2 | 80 | |
718e3744 | 81 | /* RIP command strings. */ |
d62a17ae | 82 | static const struct message rip_msg[] = {{RIP_REQUEST, "REQUEST"}, |
83 | {RIP_RESPONSE, "RESPONSE"}, | |
84 | {RIP_TRACEON, "TRACEON"}, | |
85 | {RIP_TRACEOFF, "TRACEOFF"}, | |
86 | {RIP_POLL, "POLL"}, | |
87 | {RIP_POLL_ENTRY, "POLL ENTRY"}, | |
88 | {0}}; | |
6b0655a2 | 89 | |
ae7b826a RW |
90 | /* Generate rb-tree of RIP instances. */ |
91 | static inline int rip_instance_compare(const struct rip *a, const struct rip *b) | |
92 | { | |
93 | return strcmp(a->vrf_name, b->vrf_name); | |
94 | } | |
95 | RB_GENERATE(rip_instance_head, rip, entry, rip_instance_compare) | |
96 | ||
97 | struct rip_instance_head rip_instances = RB_INITIALIZER(&rip_instances); | |
98 | ||
718e3744 | 99 | /* Utility function to set boradcast option to the socket. */ |
d62a17ae | 100 | static int sockopt_broadcast(int sock) |
718e3744 | 101 | { |
d62a17ae | 102 | int ret; |
103 | int on = 1; | |
718e3744 | 104 | |
d62a17ae | 105 | ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&on, |
106 | sizeof on); | |
107 | if (ret < 0) { | |
108 | zlog_warn("can't set sockopt SO_BROADCAST to socket %d", sock); | |
109 | return -1; | |
110 | } | |
111 | return 0; | |
718e3744 | 112 | } |
113 | ||
1137aef4 | 114 | int rip_route_rte(struct rip_info *rinfo) |
718e3744 | 115 | { |
d62a17ae | 116 | return (rinfo->type == ZEBRA_ROUTE_RIP |
117 | && rinfo->sub_type == RIP_ROUTE_RTE); | |
718e3744 | 118 | } |
119 | ||
d62a17ae | 120 | static struct rip_info *rip_info_new(void) |
718e3744 | 121 | { |
d62a17ae | 122 | return XCALLOC(MTYPE_RIP_INFO, sizeof(struct rip_info)); |
718e3744 | 123 | } |
124 | ||
d62a17ae | 125 | void rip_info_free(struct rip_info *rinfo) |
718e3744 | 126 | { |
d62a17ae | 127 | XFREE(MTYPE_RIP_INFO, rinfo); |
718e3744 | 128 | } |
129 | ||
045c5389 RW |
130 | struct rip *rip_info_get_instance(const struct rip_info *rinfo) |
131 | { | |
132 | return route_table_get_info(rinfo->rp->table); | |
133 | } | |
134 | ||
718e3744 | 135 | /* RIP route garbage collect timer. */ |
d62a17ae | 136 | static int rip_garbage_collect(struct thread *t) |
718e3744 | 137 | { |
d62a17ae | 138 | struct rip_info *rinfo; |
139 | struct route_node *rp; | |
140 | ||
141 | rinfo = THREAD_ARG(t); | |
142 | rinfo->t_garbage_collect = NULL; | |
718e3744 | 143 | |
d62a17ae | 144 | /* Off timeout timer. */ |
145 | RIP_TIMER_OFF(rinfo->t_timeout); | |
718e3744 | 146 | |
d62a17ae | 147 | /* Get route_node pointer. */ |
148 | rp = rinfo->rp; | |
718e3744 | 149 | |
d62a17ae | 150 | /* Unlock route_node. */ |
151 | listnode_delete(rp->info, rinfo); | |
152 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 153 | list_delete((struct list **)&rp->info); |
d62a17ae | 154 | route_unlock_node(rp); |
155 | } | |
718e3744 | 156 | |
d62a17ae | 157 | /* Free RIP routing information. */ |
158 | rip_info_free(rinfo); | |
718e3744 | 159 | |
d62a17ae | 160 | return 0; |
718e3744 | 161 | } |
162 | ||
045c5389 | 163 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo); |
bce8e868 LF |
164 | |
165 | /* Add new route to the ECMP list. | |
8478ae7e LF |
166 | * RETURN: the new entry added in the list, or NULL if it is not the first |
167 | * entry and ECMP is not allowed. | |
bce8e868 | 168 | */ |
045c5389 | 169 | struct rip_info *rip_ecmp_add(struct rip *rip, struct rip_info *rinfo_new) |
718e3744 | 170 | { |
d62a17ae | 171 | struct route_node *rp = rinfo_new->rp; |
172 | struct rip_info *rinfo = NULL; | |
173 | struct list *list = NULL; | |
718e3744 | 174 | |
d62a17ae | 175 | if (rp->info == NULL) |
176 | rp->info = list_new(); | |
177 | list = (struct list *)rp->info; | |
bce8e868 | 178 | |
d62a17ae | 179 | /* If ECMP is not allowed and some entry already exists in the list, |
180 | * do nothing. */ | |
181 | if (listcount(list) && !rip->ecmp) | |
182 | return NULL; | |
8478ae7e | 183 | |
d62a17ae | 184 | rinfo = rip_info_new(); |
185 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
186 | listnode_add(list, rinfo); | |
bce8e868 | 187 | |
d62a17ae | 188 | if (rip_route_rte(rinfo)) { |
045c5389 RW |
189 | rip_timeout_update(rip, rinfo); |
190 | rip_zebra_ipv4_add(rip, rp); | |
d62a17ae | 191 | } |
bce8e868 | 192 | |
d62a17ae | 193 | /* Set the route change flag on the first entry. */ |
194 | rinfo = listgetdata(listhead(list)); | |
195 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 196 | |
d62a17ae | 197 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 198 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 199 | |
d62a17ae | 200 | return rinfo; |
bce8e868 LF |
201 | } |
202 | ||
203 | /* Replace the ECMP list with the new route. | |
204 | * RETURN: the new entry added in the list | |
205 | */ | |
045c5389 | 206 | struct rip_info *rip_ecmp_replace(struct rip *rip, struct rip_info *rinfo_new) |
d62a17ae | 207 | { |
208 | struct route_node *rp = rinfo_new->rp; | |
209 | struct list *list = (struct list *)rp->info; | |
210 | struct rip_info *rinfo = NULL, *tmp_rinfo = NULL; | |
211 | struct listnode *node = NULL, *nextnode = NULL; | |
212 | ||
213 | if (list == NULL || listcount(list) == 0) | |
045c5389 | 214 | return rip_ecmp_add(rip, rinfo_new); |
d62a17ae | 215 | |
216 | /* Get the first entry */ | |
217 | rinfo = listgetdata(listhead(list)); | |
218 | ||
219 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
220 | if (rip_route_rte(rinfo) && !rip_route_rte(rinfo_new)) | |
221 | if (CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 222 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 223 | |
224 | /* Re-use the first entry, and delete the others. */ | |
225 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
226 | if (tmp_rinfo != rinfo) { | |
227 | RIP_TIMER_OFF(tmp_rinfo->t_timeout); | |
228 | RIP_TIMER_OFF(tmp_rinfo->t_garbage_collect); | |
229 | list_delete_node(list, node); | |
230 | rip_info_free(tmp_rinfo); | |
231 | } | |
718e3744 | 232 | |
d62a17ae | 233 | RIP_TIMER_OFF(rinfo->t_timeout); |
234 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
235 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
718e3744 | 236 | |
d62a17ae | 237 | if (rip_route_rte(rinfo)) { |
045c5389 | 238 | rip_timeout_update(rip, rinfo); |
d62a17ae | 239 | /* The ADD message implies an update. */ |
045c5389 | 240 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 241 | } |
718e3744 | 242 | |
d62a17ae | 243 | /* Set the route change flag. */ |
244 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
718e3744 | 245 | |
d62a17ae | 246 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 247 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 248 | |
d62a17ae | 249 | return rinfo; |
bce8e868 LF |
250 | } |
251 | ||
252 | /* Delete one route from the ECMP list. | |
253 | * RETURN: | |
254 | * null - the entry is freed, and other entries exist in the list | |
255 | * the entry - the entry is the last one in the list; its metric is set | |
256 | * to INFINITY, and the garbage collector is started for it | |
257 | */ | |
045c5389 | 258 | struct rip_info *rip_ecmp_delete(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 259 | { |
260 | struct route_node *rp = rinfo->rp; | |
261 | struct list *list = (struct list *)rp->info; | |
262 | ||
263 | RIP_TIMER_OFF(rinfo->t_timeout); | |
264 | ||
265 | if (listcount(list) > 1) { | |
266 | /* Some other ECMP entries still exist. Just delete this entry. | |
267 | */ | |
268 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
269 | listnode_delete(list, rinfo); | |
270 | if (rip_route_rte(rinfo) | |
271 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
272 | /* The ADD message implies the update. */ | |
045c5389 | 273 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 274 | rip_info_free(rinfo); |
275 | rinfo = NULL; | |
276 | } else { | |
277 | assert(rinfo == listgetdata(listhead(list))); | |
278 | ||
279 | /* This is the only entry left in the list. We must keep it in | |
280 | * the list for garbage collection time, with INFINITY metric. | |
281 | */ | |
282 | ||
283 | rinfo->metric = RIP_METRIC_INFINITY; | |
284 | RIP_TIMER_ON(rinfo->t_garbage_collect, rip_garbage_collect, | |
285 | rip->garbage_time); | |
286 | ||
287 | if (rip_route_rte(rinfo) | |
288 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 289 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 290 | } |
bce8e868 | 291 | |
d62a17ae | 292 | /* Set the route change flag on the first entry. */ |
293 | rinfo = listgetdata(listhead(list)); | |
294 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 295 | |
d62a17ae | 296 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 297 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
bce8e868 | 298 | |
d62a17ae | 299 | return rinfo; |
bce8e868 LF |
300 | } |
301 | ||
302 | /* Timeout RIP routes. */ | |
d62a17ae | 303 | static int rip_timeout(struct thread *t) |
bce8e868 | 304 | { |
045c5389 RW |
305 | struct rip_info *rinfo = THREAD_ARG(t); |
306 | struct rip *rip = rip_info_get_instance(rinfo); | |
307 | ||
308 | rip_ecmp_delete(rip, rinfo); | |
309 | ||
d62a17ae | 310 | return 0; |
718e3744 | 311 | } |
312 | ||
045c5389 | 313 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo) |
718e3744 | 314 | { |
d62a17ae | 315 | if (rinfo->metric != RIP_METRIC_INFINITY) { |
316 | RIP_TIMER_OFF(rinfo->t_timeout); | |
045c5389 RW |
317 | thread_add_timer(master, rip_timeout, rinfo, rip->timeout_time, |
318 | &rinfo->t_timeout); | |
d62a17ae | 319 | } |
320 | } | |
321 | ||
322 | static int rip_filter(int rip_distribute, struct prefix_ipv4 *p, | |
323 | struct rip_interface *ri) | |
324 | { | |
325 | struct distribute *dist; | |
326 | struct access_list *alist; | |
327 | struct prefix_list *plist; | |
328 | int distribute = rip_distribute == RIP_FILTER_OUT ? DISTRIBUTE_V4_OUT | |
329 | : DISTRIBUTE_V4_IN; | |
330 | const char *inout = rip_distribute == RIP_FILTER_OUT ? "out" : "in"; | |
331 | ||
332 | /* Input distribute-list filtering. */ | |
333 | if (ri->list[rip_distribute]) { | |
334 | if (access_list_apply(ri->list[rip_distribute], | |
335 | (struct prefix *)p) | |
336 | == FILTER_DENY) { | |
337 | if (IS_RIP_DEBUG_PACKET) | |
338 | zlog_debug("%s/%d filtered by distribute %s", | |
339 | inet_ntoa(p->prefix), p->prefixlen, | |
340 | inout); | |
341 | return -1; | |
718e3744 | 342 | } |
718e3744 | 343 | } |
d62a17ae | 344 | if (ri->prefix[rip_distribute]) { |
345 | if (prefix_list_apply(ri->prefix[rip_distribute], | |
346 | (struct prefix *)p) | |
347 | == PREFIX_DENY) { | |
348 | if (IS_RIP_DEBUG_PACKET) | |
349 | zlog_debug("%s/%d filtered by prefix-list %s", | |
350 | inet_ntoa(p->prefix), p->prefixlen, | |
351 | inout); | |
352 | return -1; | |
718e3744 | 353 | } |
718e3744 | 354 | } |
d62a17ae | 355 | |
356 | /* All interface filter check. */ | |
045c5389 | 357 | dist = distribute_lookup(ri->rip->distribute_ctx, NULL); |
d62a17ae | 358 | if (dist) { |
359 | if (dist->list[distribute]) { | |
360 | alist = access_list_lookup(AFI_IP, | |
361 | dist->list[distribute]); | |
362 | ||
363 | if (alist) { | |
364 | if (access_list_apply(alist, (struct prefix *)p) | |
365 | == FILTER_DENY) { | |
366 | if (IS_RIP_DEBUG_PACKET) | |
367 | zlog_debug( | |
368 | "%s/%d filtered by distribute %s", | |
369 | inet_ntoa(p->prefix), | |
370 | p->prefixlen, inout); | |
371 | return -1; | |
372 | } | |
373 | } | |
374 | } | |
375 | if (dist->prefix[distribute]) { | |
376 | plist = prefix_list_lookup(AFI_IP, | |
377 | dist->prefix[distribute]); | |
378 | ||
379 | if (plist) { | |
380 | if (prefix_list_apply(plist, (struct prefix *)p) | |
381 | == PREFIX_DENY) { | |
382 | if (IS_RIP_DEBUG_PACKET) | |
383 | zlog_debug( | |
384 | "%s/%d filtered by prefix-list %s", | |
385 | inet_ntoa(p->prefix), | |
386 | p->prefixlen, inout); | |
387 | return -1; | |
388 | } | |
389 | } | |
390 | } | |
391 | } | |
392 | return 0; | |
718e3744 | 393 | } |
394 | ||
395 | /* Check nexthop address validity. */ | |
045c5389 | 396 | static int rip_nexthop_check(struct rip *rip, struct in_addr *addr) |
718e3744 | 397 | { |
d62a17ae | 398 | struct interface *ifp; |
f4e14fdb | 399 | struct listnode *cnode; |
d62a17ae | 400 | struct connected *ifc; |
401 | struct prefix *p; | |
718e3744 | 402 | |
d62a17ae | 403 | /* If nexthop address matches local configured address then it is |
404 | invalid nexthop. */ | |
b2d7c082 | 405 | |
ae7b826a | 406 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 407 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, ifc)) { |
408 | p = ifc->address; | |
718e3744 | 409 | |
d62a17ae | 410 | if (p->family == AF_INET |
411 | && IPV4_ADDR_SAME(&p->u.prefix4, addr)) | |
412 | return -1; | |
413 | } | |
718e3744 | 414 | } |
d62a17ae | 415 | return 0; |
718e3744 | 416 | } |
417 | ||
418 | /* RIP add route to routing table. */ | |
d62a17ae | 419 | static void rip_rte_process(struct rte *rte, struct sockaddr_in *from, |
420 | struct interface *ifp) | |
421 | { | |
045c5389 | 422 | struct rip *rip; |
d62a17ae | 423 | int ret; |
424 | struct prefix_ipv4 p; | |
425 | struct route_node *rp; | |
426 | struct rip_info *rinfo = NULL, newinfo; | |
427 | struct rip_interface *ri; | |
428 | struct in_addr *nexthop; | |
429 | int same = 0; | |
430 | unsigned char old_dist, new_dist; | |
431 | struct list *list = NULL; | |
432 | struct listnode *node = NULL; | |
433 | ||
434 | /* Make prefix structure. */ | |
435 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
436 | p.family = AF_INET; | |
437 | p.prefix = rte->prefix; | |
438 | p.prefixlen = ip_masklen(rte->mask); | |
439 | ||
440 | /* Make sure mask is applied. */ | |
441 | apply_mask_ipv4(&p); | |
442 | ||
d62a17ae | 443 | ri = ifp->info; |
045c5389 | 444 | rip = ri->rip; |
718e3744 | 445 | |
045c5389 | 446 | /* Apply input filters. */ |
d62a17ae | 447 | ret = rip_filter(RIP_FILTER_IN, &p, ri); |
448 | if (ret < 0) | |
449 | return; | |
450 | ||
451 | memset(&newinfo, 0, sizeof(newinfo)); | |
452 | newinfo.type = ZEBRA_ROUTE_RIP; | |
453 | newinfo.sub_type = RIP_ROUTE_RTE; | |
dd127197 | 454 | newinfo.nh.gate.ipv4 = rte->nexthop; |
d62a17ae | 455 | newinfo.from = from->sin_addr; |
dd127197 DS |
456 | newinfo.nh.ifindex = ifp->ifindex; |
457 | newinfo.nh.type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
d62a17ae | 458 | newinfo.metric = rte->metric; |
459 | newinfo.metric_out = rte->metric; /* XXX */ | |
460 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
461 | ||
462 | /* Modify entry according to the interface routemap. */ | |
463 | if (ri->routemap[RIP_FILTER_IN]) { | |
d62a17ae | 464 | /* The object should be of the type of rip_info */ |
465 | ret = route_map_apply(ri->routemap[RIP_FILTER_IN], | |
466 | (struct prefix *)&p, RMAP_RIP, &newinfo); | |
467 | ||
468 | if (ret == RMAP_DENYMATCH) { | |
469 | if (IS_RIP_DEBUG_PACKET) | |
470 | zlog_debug( | |
471 | "RIP %s/%d is filtered by route-map in", | |
472 | inet_ntoa(p.prefix), p.prefixlen); | |
473 | return; | |
474 | } | |
475 | ||
476 | /* Get back the object */ | |
477 | rte->nexthop = newinfo.nexthop_out; | |
478 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
996c9314 LB |
479 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the |
480 | metric_out field */ | |
d62a17ae | 481 | } |
482 | ||
483 | /* Once the entry has been validated, update the metric by | |
484 | adding the cost of the network on wich the message | |
485 | arrived. If the result is greater than infinity, use infinity | |
486 | (RFC2453 Sec. 3.9.2) */ | |
487 | /* Zebra ripd can handle offset-list in. */ | |
488 | ret = rip_offset_list_apply_in(&p, ifp, &rte->metric); | |
718e3744 | 489 | |
d62a17ae | 490 | /* If offset-list does not modify the metric use interface's |
491 | metric. */ | |
492 | if (!ret) | |
493 | rte->metric += ifp->metric ? ifp->metric : 1; | |
718e3744 | 494 | |
d62a17ae | 495 | if (rte->metric > RIP_METRIC_INFINITY) |
496 | rte->metric = RIP_METRIC_INFINITY; | |
497 | ||
498 | /* Set nexthop pointer. */ | |
499 | if (rte->nexthop.s_addr == 0) | |
500 | nexthop = &from->sin_addr; | |
501 | else | |
502 | nexthop = &rte->nexthop; | |
503 | ||
504 | /* Check if nexthop address is myself, then do nothing. */ | |
045c5389 | 505 | if (rip_nexthop_check(rip, nexthop) < 0) { |
d62a17ae | 506 | if (IS_RIP_DEBUG_PACKET) |
507 | zlog_debug("Nexthop address %s is myself", | |
508 | inet_ntoa(*nexthop)); | |
509 | return; | |
510 | } | |
511 | ||
512 | /* Get index for the prefix. */ | |
513 | rp = route_node_get(rip->table, (struct prefix *)&p); | |
514 | ||
515 | newinfo.rp = rp; | |
dd127197 DS |
516 | newinfo.nh.gate.ipv4 = *nexthop; |
517 | newinfo.nh.type = NEXTHOP_TYPE_IPV4; | |
d62a17ae | 518 | newinfo.metric = rte->metric; |
519 | newinfo.tag = ntohs(rte->tag); | |
045c5389 | 520 | newinfo.distance = rip_distance_apply(rip, &newinfo); |
d62a17ae | 521 | |
522 | new_dist = newinfo.distance ? newinfo.distance | |
523 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
524 | ||
525 | /* Check to see whether there is already RIP route on the table. */ | |
526 | if ((list = rp->info) != NULL) | |
527 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
528 | /* Need to compare with redistributed entry or local | |
529 | * entry */ | |
530 | if (!rip_route_rte(rinfo)) | |
531 | break; | |
532 | ||
533 | if (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 534 | && IPV4_ADDR_SAME(&rinfo->nh.gate.ipv4, nexthop)) |
d62a17ae | 535 | break; |
536 | ||
537 | if (!listnextnode(node)) { | |
538 | /* Not found in the list */ | |
539 | ||
540 | if (rte->metric > rinfo->metric) { | |
541 | /* New route has a greater metric. | |
542 | * Discard it. */ | |
543 | route_unlock_node(rp); | |
544 | return; | |
545 | } | |
546 | ||
547 | if (rte->metric < rinfo->metric) | |
548 | /* New route has a smaller metric. | |
549 | * Replace the ECMP list | |
550 | * with the new one in below. */ | |
551 | break; | |
552 | ||
553 | /* Metrics are same. We compare the distances. | |
554 | */ | |
555 | old_dist = rinfo->distance | |
556 | ? rinfo->distance | |
557 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
558 | ||
559 | if (new_dist > old_dist) { | |
560 | /* New route has a greater distance. | |
561 | * Discard it. */ | |
562 | route_unlock_node(rp); | |
563 | return; | |
564 | } | |
565 | ||
566 | if (new_dist < old_dist) | |
567 | /* New route has a smaller distance. | |
568 | * Replace the ECMP list | |
569 | * with the new one in below. */ | |
570 | break; | |
571 | ||
572 | /* Metrics and distances are both same. Keep | |
573 | * "rinfo" null and | |
574 | * the new route is added in the ECMP list in | |
575 | * below. */ | |
576 | } | |
718e3744 | 577 | } |
d62a17ae | 578 | |
579 | if (rinfo) { | |
580 | /* Local static route. */ | |
581 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
582 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
583 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
584 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
585 | route_unlock_node(rp); | |
586 | return; | |
718e3744 | 587 | } |
d62a17ae | 588 | |
589 | /* Redistributed route check. */ | |
590 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
591 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
592 | old_dist = rinfo->distance; | |
593 | /* Only routes directly connected to an interface | |
594 | * (nexthop == 0) | |
595 | * may have a valid NULL distance */ | |
dd127197 | 596 | if (rinfo->nh.gate.ipv4.s_addr != 0) |
d62a17ae | 597 | old_dist = old_dist |
598 | ? old_dist | |
599 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
600 | /* If imported route does not have STRICT precedence, | |
601 | mark it as a ghost */ | |
602 | if (new_dist <= old_dist | |
603 | && rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 604 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 605 | |
606 | route_unlock_node(rp); | |
607 | return; | |
718e3744 | 608 | } |
d62a17ae | 609 | } |
610 | ||
611 | if (!rinfo) { | |
612 | if (rp->info) | |
613 | route_unlock_node(rp); | |
614 | ||
615 | /* Now, check to see whether there is already an explicit route | |
616 | for the destination prefix. If there is no such route, add | |
617 | this route to the routing table, unless the metric is | |
618 | infinity (there is no point in adding a route which | |
619 | unusable). */ | |
620 | if (rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 621 | rip_ecmp_add(rip, &newinfo); |
d62a17ae | 622 | } else { |
623 | /* Route is there but we are not sure the route is RIP or not. | |
624 | */ | |
625 | ||
626 | /* If there is an existing route, compare the next hop address | |
627 | to the address of the router from which the datagram came. | |
628 | If this datagram is from the same router as the existing | |
629 | route, reinitialize the timeout. */ | |
630 | same = (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 631 | && (rinfo->nh.ifindex == ifp->ifindex)); |
d62a17ae | 632 | |
633 | old_dist = rinfo->distance ? rinfo->distance | |
634 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
635 | ||
636 | /* Next, compare the metrics. If the datagram is from the same | |
637 | router as the existing route, and the new metric is different | |
638 | than the old one; or, if the new metric is lower than the old | |
639 | one, or if the tag has been changed; or if there is a route | |
640 | with a lower administrave distance; or an update of the | |
641 | distance on the actual route; do the following actions: */ | |
642 | if ((same && rinfo->metric != rte->metric) | |
643 | || (rte->metric < rinfo->metric) | |
644 | || ((same) && (rinfo->metric == rte->metric) | |
645 | && (newinfo.tag != rinfo->tag)) | |
646 | || (old_dist > new_dist) | |
647 | || ((old_dist != new_dist) && same)) { | |
648 | if (listcount(list) == 1) { | |
649 | if (newinfo.metric != RIP_METRIC_INFINITY) | |
045c5389 | 650 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 651 | else |
045c5389 | 652 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 653 | } else { |
654 | if (newinfo.metric < rinfo->metric) | |
045c5389 | 655 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 656 | else if (newinfo.metric > rinfo->metric) |
045c5389 | 657 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 658 | else if (new_dist < old_dist) |
045c5389 | 659 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 660 | else if (new_dist > old_dist) |
045c5389 | 661 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 662 | else { |
663 | int update = CHECK_FLAG(rinfo->flags, | |
664 | RIP_RTF_FIB) | |
665 | ? 1 | |
666 | : 0; | |
667 | ||
668 | assert(newinfo.metric | |
669 | != RIP_METRIC_INFINITY); | |
670 | ||
671 | RIP_TIMER_OFF(rinfo->t_timeout); | |
672 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
673 | memcpy(rinfo, &newinfo, | |
674 | sizeof(struct rip_info)); | |
045c5389 | 675 | rip_timeout_update(rip, rinfo); |
d62a17ae | 676 | |
677 | if (update) | |
045c5389 | 678 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 679 | |
680 | /* - Set the route change flag on the | |
681 | * first entry. */ | |
682 | rinfo = listgetdata(listhead(list)); | |
683 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
045c5389 | 684 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 685 | } |
686 | } | |
687 | } else /* same & no change */ | |
045c5389 | 688 | rip_timeout_update(rip, rinfo); |
d62a17ae | 689 | |
690 | /* Unlock tempolary lock of the route. */ | |
691 | route_unlock_node(rp); | |
692 | } | |
693 | } | |
694 | ||
695 | /* Dump RIP packet */ | |
696 | static void rip_packet_dump(struct rip_packet *packet, int size, | |
697 | const char *sndrcv) | |
698 | { | |
699 | caddr_t lim; | |
700 | struct rte *rte; | |
701 | const char *command_str; | |
702 | char pbuf[BUFSIZ], nbuf[BUFSIZ]; | |
d7c0a89a QY |
703 | uint8_t netmask = 0; |
704 | uint8_t *p; | |
d62a17ae | 705 | |
706 | /* Set command string. */ | |
707 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
708 | command_str = lookup_msg(rip_msg, packet->command, NULL); | |
709 | else | |
710 | command_str = "unknown"; | |
711 | ||
712 | /* Dump packet header. */ | |
713 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
714 | packet->version, size); | |
715 | ||
716 | /* Dump each routing table entry. */ | |
717 | rte = packet->rte; | |
718 | ||
719 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
720 | if (packet->version == RIPv2) { | |
721 | netmask = ip_masklen(rte->mask); | |
722 | ||
723 | if (rte->family == htons(RIP_FAMILY_AUTH)) { | |
724 | if (rte->tag | |
725 | == htons(RIP_AUTH_SIMPLE_PASSWORD)) { | |
d7c0a89a | 726 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 727 | |
728 | zlog_debug( | |
729 | " family 0x%X type %d auth string: %s", | |
730 | ntohs(rte->family), | |
731 | ntohs(rte->tag), p); | |
732 | } else if (rte->tag == htons(RIP_AUTH_MD5)) { | |
733 | struct rip_md5_info *md5; | |
734 | ||
735 | md5 = (struct rip_md5_info *)&packet | |
736 | ->rte; | |
737 | ||
738 | zlog_debug( | |
739 | " family 0x%X type %d (MD5 authentication)", | |
740 | ntohs(md5->family), | |
741 | ntohs(md5->type)); | |
742 | zlog_debug( | |
743 | " RIP-2 packet len %d Key ID %d" | |
744 | " Auth Data len %d", | |
745 | ntohs(md5->packet_len), | |
746 | md5->keyid, md5->auth_len); | |
d7c0a89a QY |
747 | zlog_debug(" Sequence Number %ld", |
748 | (unsigned long)ntohl( | |
749 | md5->sequence)); | |
d62a17ae | 750 | } else if (rte->tag == htons(RIP_AUTH_DATA)) { |
d7c0a89a | 751 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 752 | |
753 | zlog_debug( | |
754 | " family 0x%X type %d (MD5 data)", | |
755 | ntohs(rte->family), | |
756 | ntohs(rte->tag)); | |
757 | zlog_debug( | |
758 | " MD5: %02X%02X%02X%02X%02X%02X%02X%02X" | |
759 | "%02X%02X%02X%02X%02X%02X%02X%02X", | |
760 | p[0], p[1], p[2], p[3], p[4], | |
761 | p[5], p[6], p[7], p[8], p[9], | |
762 | p[10], p[11], p[12], p[13], | |
763 | p[14], p[15]); | |
764 | } else { | |
765 | zlog_debug( | |
766 | " family 0x%X type %d (Unknown auth type)", | |
767 | ntohs(rte->family), | |
768 | ntohs(rte->tag)); | |
769 | } | |
770 | } else | |
771 | zlog_debug( | |
772 | " %s/%d -> %s family %d tag %" ROUTE_TAG_PRI | |
773 | " metric %ld", | |
774 | inet_ntop(AF_INET, &rte->prefix, pbuf, | |
775 | BUFSIZ), | |
776 | netmask, | |
777 | inet_ntop(AF_INET, &rte->nexthop, nbuf, | |
778 | BUFSIZ), | |
779 | ntohs(rte->family), | |
780 | (route_tag_t)ntohs(rte->tag), | |
d7c0a89a | 781 | (unsigned long)ntohl(rte->metric)); |
d62a17ae | 782 | } else { |
783 | zlog_debug( | |
784 | " %s family %d tag %" ROUTE_TAG_PRI | |
785 | " metric %ld", | |
786 | inet_ntop(AF_INET, &rte->prefix, pbuf, BUFSIZ), | |
787 | ntohs(rte->family), | |
788 | (route_tag_t)ntohs(rte->tag), | |
d7c0a89a | 789 | (unsigned long)ntohl(rte->metric)); |
718e3744 | 790 | } |
718e3744 | 791 | } |
718e3744 | 792 | } |
793 | ||
794 | /* Check if the destination address is valid (unicast; not net 0 | |
795 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
796 | check net 0 because we accept default route. */ | |
d62a17ae | 797 | static int rip_destination_check(struct in_addr addr) |
718e3744 | 798 | { |
d7c0a89a | 799 | uint32_t destination; |
718e3744 | 800 | |
d62a17ae | 801 | /* Convert to host byte order. */ |
802 | destination = ntohl(addr.s_addr); | |
718e3744 | 803 | |
d62a17ae | 804 | if (IPV4_NET127(destination)) |
805 | return 0; | |
718e3744 | 806 | |
d62a17ae | 807 | /* Net 0 may match to the default route. */ |
808 | if (IPV4_NET0(destination) && destination != 0) | |
809 | return 0; | |
718e3744 | 810 | |
d62a17ae | 811 | /* Unicast address must belong to class A, B, C. */ |
812 | if (IN_CLASSA(destination)) | |
813 | return 1; | |
814 | if (IN_CLASSB(destination)) | |
815 | return 1; | |
816 | if (IN_CLASSC(destination)) | |
817 | return 1; | |
718e3744 | 818 | |
d62a17ae | 819 | return 0; |
718e3744 | 820 | } |
821 | ||
822 | /* RIP version 2 authentication. */ | |
d62a17ae | 823 | static int rip_auth_simple_password(struct rte *rte, struct sockaddr_in *from, |
824 | struct interface *ifp) | |
825 | { | |
826 | struct rip_interface *ri; | |
0961ea93 | 827 | char *auth_str = (char *)rte + offsetof(struct rte, prefix); |
d62a17ae | 828 | int i; |
829 | ||
830 | /* reject passwords with zeros in the middle of the string */ | |
0961ea93 | 831 | for (i = strnlen(auth_str, 16); i < 16; i++) { |
d62a17ae | 832 | if (auth_str[i] != '\0') |
833 | return 0; | |
834 | } | |
835 | ||
836 | if (IS_RIP_DEBUG_EVENT) | |
837 | zlog_debug("RIPv2 simple password authentication from %s", | |
838 | inet_ntoa(from->sin_addr)); | |
839 | ||
840 | ri = ifp->info; | |
841 | ||
842 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
843 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) | |
844 | return 0; | |
718e3744 | 845 | |
d62a17ae | 846 | /* Simple password authentication. */ |
847 | if (ri->auth_str) { | |
848 | if (strncmp(auth_str, ri->auth_str, 16) == 0) | |
849 | return 1; | |
850 | } | |
851 | if (ri->key_chain) { | |
852 | struct keychain *keychain; | |
853 | struct key *key; | |
854 | ||
855 | keychain = keychain_lookup(ri->key_chain); | |
c4efb224 | 856 | if (keychain == NULL || keychain->key == NULL) |
d62a17ae | 857 | return 0; |
858 | ||
859 | key = key_match_for_accept(keychain, auth_str); | |
860 | if (key) | |
861 | return 1; | |
862 | } | |
863 | return 0; | |
718e3744 | 864 | } |
865 | ||
866 | /* RIP version 2 authentication with MD5. */ | |
d62a17ae | 867 | static int rip_auth_md5(struct rip_packet *packet, struct sockaddr_in *from, |
868 | int length, struct interface *ifp) | |
869 | { | |
870 | struct rip_interface *ri; | |
871 | struct rip_md5_info *md5; | |
872 | struct rip_md5_data *md5data; | |
873 | struct keychain *keychain; | |
874 | struct key *key; | |
0513a271 MR |
875 | #ifdef CRYPTO_OPENSSL |
876 | EVP_MD_CTX *ctx; | |
877 | #elif CRYPTO_INTERNAL | |
d62a17ae | 878 | MD5_CTX ctx; |
0513a271 | 879 | #endif |
d7c0a89a QY |
880 | uint8_t digest[RIP_AUTH_MD5_SIZE]; |
881 | uint16_t packet_len; | |
5c84f238 | 882 | char auth_str[RIP_AUTH_MD5_SIZE] = {}; |
d62a17ae | 883 | |
884 | if (IS_RIP_DEBUG_EVENT) | |
885 | zlog_debug("RIPv2 MD5 authentication from %s", | |
886 | inet_ntoa(from->sin_addr)); | |
718e3744 | 887 | |
d62a17ae | 888 | ri = ifp->info; |
889 | md5 = (struct rip_md5_info *)&packet->rte; | |
890 | ||
891 | /* Check auth type. */ | |
892 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) | |
893 | return 0; | |
894 | ||
895 | /* If the authentication length is less than 16, then it must be wrong | |
896 | * for | |
897 | * any interpretation of rfc2082. Some implementations also interpret | |
898 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka | |
899 | * RIP_AUTH_MD5_COMPAT_SIZE. | |
900 | */ | |
901 | if (!((md5->auth_len == RIP_AUTH_MD5_SIZE) | |
902 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) { | |
903 | if (IS_RIP_DEBUG_EVENT) | |
904 | zlog_debug( | |
905 | "RIPv2 MD5 authentication, strange authentication " | |
906 | "length field %d", | |
907 | md5->auth_len); | |
908 | return 0; | |
909 | } | |
910 | ||
911 | /* grab and verify check packet length */ | |
912 | packet_len = ntohs(md5->packet_len); | |
718e3744 | 913 | |
d62a17ae | 914 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) { |
915 | if (IS_RIP_DEBUG_EVENT) | |
916 | zlog_debug( | |
917 | "RIPv2 MD5 authentication, packet length field %d " | |
918 | "greater than received length %d!", | |
919 | md5->packet_len, length); | |
920 | return 0; | |
921 | } | |
922 | ||
923 | /* retrieve authentication data */ | |
d7c0a89a | 924 | md5data = (struct rip_md5_data *)(((uint8_t *)packet) + packet_len); |
d62a17ae | 925 | |
d62a17ae | 926 | if (ri->key_chain) { |
927 | keychain = keychain_lookup(ri->key_chain); | |
928 | if (keychain == NULL) | |
929 | return 0; | |
930 | ||
931 | key = key_lookup_for_accept(keychain, md5->keyid); | |
e65e227f | 932 | if (key == NULL || key->string == NULL) |
d62a17ae | 933 | return 0; |
934 | ||
5c84f238 | 935 | strlcpy(auth_str, key->string, sizeof(auth_str)); |
d62a17ae | 936 | } else if (ri->auth_str) |
5c84f238 | 937 | strlcpy(auth_str, ri->auth_str, sizeof(auth_str)); |
d62a17ae | 938 | |
939 | if (auth_str[0] == 0) | |
940 | return 0; | |
941 | ||
942 | /* MD5 digest authentication. */ | |
0513a271 MR |
943 | #ifdef CRYPTO_OPENSSL |
944 | unsigned int md5_size = RIP_AUTH_MD5_SIZE; | |
945 | ctx = EVP_MD_CTX_new(); | |
946 | EVP_DigestInit(ctx, EVP_md5()); | |
947 | EVP_DigestUpdate(ctx, packet, packet_len + RIP_HEADER_SIZE); | |
948 | EVP_DigestUpdate(ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
949 | EVP_DigestFinal(ctx, digest, &md5_size); | |
950 | EVP_MD_CTX_free(ctx); | |
951 | #elif CRYPTO_INTERNAL | |
d62a17ae | 952 | memset(&ctx, 0, sizeof(ctx)); |
953 | MD5Init(&ctx); | |
954 | MD5Update(&ctx, packet, packet_len + RIP_HEADER_SIZE); | |
955 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
956 | MD5Final(digest, &ctx); | |
0513a271 | 957 | #endif |
d62a17ae | 958 | |
959 | if (memcmp(md5data->digest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
960 | return packet_len; | |
961 | else | |
962 | return 0; | |
718e3744 | 963 | } |
964 | ||
b14ee00b | 965 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
966 | * (left justified and padded). | |
967 | * | |
968 | * presumes one of ri or key is valid, and that the auth strings they point | |
969 | * to are nul terminated. If neither are present, auth_str will be fully | |
970 | * zero padded. | |
971 | * | |
972 | */ | |
d62a17ae | 973 | static void rip_auth_prepare_str_send(struct rip_interface *ri, struct key *key, |
974 | char *auth_str, int len) | |
718e3744 | 975 | { |
d62a17ae | 976 | assert(ri || key); |
718e3744 | 977 | |
d62a17ae | 978 | memset(auth_str, 0, len); |
979 | if (key && key->string) | |
5c84f238 | 980 | strlcpy(auth_str, key->string, len); |
d62a17ae | 981 | else if (ri->auth_str) |
5c84f238 | 982 | strlcpy(auth_str, ri->auth_str, len); |
718e3744 | 983 | |
d62a17ae | 984 | return; |
b14ee00b | 985 | } |
718e3744 | 986 | |
b14ee00b | 987 | /* Write RIPv2 simple password authentication information |
988 | * | |
d62a17ae | 989 | * auth_str is presumed to be 2 bytes and correctly prepared |
b14ee00b | 990 | * (left justified and zero padded). |
991 | */ | |
d62a17ae | 992 | static void rip_auth_simple_write(struct stream *s, char *auth_str, int len) |
b14ee00b | 993 | { |
d62a17ae | 994 | assert(s && len == RIP_AUTH_SIMPLE_SIZE); |
995 | ||
996 | stream_putw(s, RIP_FAMILY_AUTH); | |
997 | stream_putw(s, RIP_AUTH_SIMPLE_PASSWORD); | |
998 | stream_put(s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
999 | ||
1000 | return; | |
b14ee00b | 1001 | } |
718e3744 | 1002 | |
d62a17ae | 1003 | /* write RIPv2 MD5 "authentication header" |
b14ee00b | 1004 | * (uses the auth key data field) |
1005 | * | |
1006 | * Digest offset field is set to 0. | |
1007 | * | |
1008 | * returns: offset of the digest offset field, which must be set when | |
1009 | * length to the auth-data MD5 digest is known. | |
1010 | */ | |
d62a17ae | 1011 | static size_t rip_auth_md5_ah_write(struct stream *s, struct rip_interface *ri, |
1012 | struct key *key) | |
1013 | { | |
1014 | size_t doff = 0; | |
1015 | ||
1016 | assert(s && ri && ri->auth_type == RIP_AUTH_MD5); | |
1017 | ||
1018 | /* MD5 authentication. */ | |
1019 | stream_putw(s, RIP_FAMILY_AUTH); | |
1020 | stream_putw(s, RIP_AUTH_MD5); | |
1021 | ||
1022 | /* MD5 AH digest offset field. | |
1023 | * | |
1024 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
1025 | * is known. Actual value is set in .....(). | |
1026 | */ | |
1027 | doff = stream_get_endp(s); | |
1028 | stream_putw(s, 0); | |
1029 | ||
1030 | /* Key ID. */ | |
1031 | if (key) | |
1032 | stream_putc(s, key->index % 256); | |
1033 | else | |
1034 | stream_putc(s, 1); | |
1035 | ||
1036 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds | |
1037 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for | |
1038 | * this | |
1039 | * to be configurable. | |
1040 | */ | |
1041 | stream_putc(s, ri->md5_auth_len); | |
1042 | ||
1043 | /* Sequence Number (non-decreasing). */ | |
1044 | /* RFC2080: The value used in the sequence number is | |
1045 | arbitrary, but two suggestions are the time of the | |
1046 | message's creation or a simple message counter. */ | |
1047 | stream_putl(s, time(NULL)); | |
1048 | ||
1049 | /* Reserved field must be zero. */ | |
1050 | stream_putl(s, 0); | |
1051 | stream_putl(s, 0); | |
1052 | ||
1053 | return doff; | |
b14ee00b | 1054 | } |
1055 | ||
1056 | /* If authentication is in used, write the appropriate header | |
1057 | * returns stream offset to which length must later be written | |
1058 | * or 0 if this is not required | |
1059 | */ | |
d62a17ae | 1060 | static size_t rip_auth_header_write(struct stream *s, struct rip_interface *ri, |
1061 | struct key *key, char *auth_str, int len) | |
1062 | { | |
1063 | assert(ri->auth_type != RIP_NO_AUTH); | |
1064 | ||
1065 | switch (ri->auth_type) { | |
1066 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1067 | rip_auth_prepare_str_send(ri, key, auth_str, len); | |
1068 | rip_auth_simple_write(s, auth_str, len); | |
1069 | return 0; | |
1070 | case RIP_AUTH_MD5: | |
1071 | return rip_auth_md5_ah_write(s, ri, key); | |
1072 | } | |
1073 | assert(1); | |
1074 | return 0; | |
b14ee00b | 1075 | } |
1076 | ||
1077 | /* Write RIPv2 MD5 authentication data trailer */ | |
d62a17ae | 1078 | static void rip_auth_md5_set(struct stream *s, struct rip_interface *ri, |
1079 | size_t doff, char *auth_str, int authlen) | |
1080 | { | |
1081 | unsigned long len; | |
0513a271 MR |
1082 | #ifdef CRYPTO_OPENSSL |
1083 | EVP_MD_CTX *ctx; | |
1084 | #elif CRYPTO_INTERNAL | |
d62a17ae | 1085 | MD5_CTX ctx; |
0513a271 | 1086 | #endif |
d62a17ae | 1087 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
1088 | ||
1089 | /* Make it sure this interface is configured as MD5 | |
1090 | authentication. */ | |
1091 | assert((ri->auth_type == RIP_AUTH_MD5) | |
1092 | && (authlen == RIP_AUTH_MD5_SIZE)); | |
1093 | assert(doff > 0); | |
1094 | ||
1095 | /* Get packet length. */ | |
1096 | len = stream_get_endp(s); | |
1097 | ||
1098 | /* Check packet length. */ | |
1099 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) { | |
1c50c1c0 QY |
1100 | flog_err( |
1101 | EC_RIP_PACKET, | |
1102 | "rip_auth_md5_set(): packet length %ld is less than minimum length.", | |
1103 | len); | |
d62a17ae | 1104 | return; |
1105 | } | |
1106 | ||
1107 | /* Set the digest offset length in the header */ | |
1108 | stream_putw_at(s, doff, len); | |
1109 | ||
1110 | /* Set authentication data. */ | |
1111 | stream_putw(s, RIP_FAMILY_AUTH); | |
1112 | stream_putw(s, RIP_AUTH_DATA); | |
1113 | ||
1114 | /* Generate a digest for the RIP packet. */ | |
0513a271 MR |
1115 | #ifdef CRYPTO_OPENSSL |
1116 | unsigned int md5_size = RIP_AUTH_MD5_SIZE; | |
1117 | ctx = EVP_MD_CTX_new(); | |
1118 | EVP_DigestInit(ctx, EVP_md5()); | |
1119 | EVP_DigestUpdate(ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1120 | EVP_DigestUpdate(ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1121 | EVP_DigestFinal(ctx, digest, &md5_size); | |
1122 | EVP_MD_CTX_free(ctx); | |
1123 | #elif CRYPTO_INTERNAL | |
d62a17ae | 1124 | memset(&ctx, 0, sizeof(ctx)); |
1125 | MD5Init(&ctx); | |
1126 | MD5Update(&ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1127 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1128 | MD5Final(digest, &ctx); | |
0513a271 | 1129 | #endif |
d62a17ae | 1130 | |
1131 | /* Copy the digest to the packet. */ | |
1132 | stream_write(s, digest, RIP_AUTH_MD5_SIZE); | |
718e3744 | 1133 | } |
1134 | ||
1135 | /* RIP routing information. */ | |
d62a17ae | 1136 | static void rip_response_process(struct rip_packet *packet, int size, |
1137 | struct sockaddr_in *from, | |
1138 | struct connected *ifc) | |
1139 | { | |
045c5389 RW |
1140 | struct rip_interface *ri = ifc->ifp->info; |
1141 | struct rip *rip = ri->rip; | |
d62a17ae | 1142 | caddr_t lim; |
1143 | struct rte *rte; | |
1144 | struct prefix_ipv4 ifaddr; | |
1145 | struct prefix_ipv4 ifaddrclass; | |
1146 | int subnetted; | |
1147 | ||
1148 | memset(&ifaddr, 0, sizeof(ifaddr)); | |
1149 | /* We don't know yet. */ | |
1150 | subnetted = -1; | |
1151 | ||
1152 | /* The Response must be ignored if it is not from the RIP | |
1153 | port. (RFC2453 - Sec. 3.9.2)*/ | |
1154 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) { | |
1155 | zlog_info("response doesn't come from RIP port: %d", | |
1156 | from->sin_port); | |
045c5389 | 1157 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1158 | return; |
718e3744 | 1159 | } |
1160 | ||
d62a17ae | 1161 | /* The datagram's IPv4 source address should be checked to see |
1162 | whether the datagram is from a valid neighbor; the source of the | |
1163 | datagram must be on a directly connected network (RFC2453 - Sec. | |
1164 | 3.9.2) */ | |
ae7b826a RW |
1165 | if (if_lookup_address((void *)&from->sin_addr, AF_INET, |
1166 | rip->vrf->vrf_id) | |
d62a17ae | 1167 | == NULL) { |
1168 | zlog_info( | |
1169 | "This datagram doesn't came from a valid neighbor: %s", | |
1170 | inet_ntoa(from->sin_addr)); | |
045c5389 | 1171 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1172 | return; |
718e3744 | 1173 | } |
1174 | ||
d62a17ae | 1175 | /* It is also worth checking to see whether the response is from one |
1176 | of the router's own addresses. */ | |
1177 | ||
1178 | ; /* Alredy done in rip_read () */ | |
1179 | ||
1180 | /* Update RIP peer. */ | |
045c5389 | 1181 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1182 | |
1183 | /* Set RTE pointer. */ | |
1184 | rte = packet->rte; | |
1185 | ||
1186 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
1187 | /* RIPv2 authentication check. */ | |
1188 | /* If the Address Family Identifier of the first (and only the | |
1189 | first) entry in the message is 0xFFFF, then the remainder of | |
1190 | the entry contains the authentication. */ | |
1191 | /* If the packet gets here it means authentication enabled */ | |
1192 | /* Check is done in rip_read(). So, just skipping it */ | |
1193 | if (packet->version == RIPv2 && rte == packet->rte | |
1194 | && rte->family == htons(RIP_FAMILY_AUTH)) | |
1195 | continue; | |
1196 | ||
1197 | if (rte->family != htons(AF_INET)) { | |
1198 | /* Address family check. RIP only supports AF_INET. */ | |
1199 | zlog_info("Unsupported family %d from %s.", | |
1200 | ntohs(rte->family), | |
1201 | inet_ntoa(from->sin_addr)); | |
1202 | continue; | |
718e3744 | 1203 | } |
d62a17ae | 1204 | |
1205 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1206 | or 127) */ | |
1207 | if (!rip_destination_check(rte->prefix)) { | |
1208 | zlog_info( | |
1209 | "Network is net 0 or net 127 or it is not unicast network"); | |
045c5389 | 1210 | rip_peer_bad_route(rip, from); |
d62a17ae | 1211 | continue; |
718e3744 | 1212 | } |
1213 | ||
d62a17ae | 1214 | /* Convert metric value to host byte order. */ |
1215 | rte->metric = ntohl(rte->metric); | |
718e3744 | 1216 | |
d62a17ae | 1217 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1218 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
1219 | zlog_info("Route's metric is not in the 1-16 range."); | |
045c5389 | 1220 | rip_peer_bad_route(rip, from); |
d62a17ae | 1221 | continue; |
1222 | } | |
718e3744 | 1223 | |
d62a17ae | 1224 | /* RIPv1 does not have nexthop value. */ |
1225 | if (packet->version == RIPv1 && rte->nexthop.s_addr != 0) { | |
1226 | zlog_info("RIPv1 packet with nexthop value %s", | |
1227 | inet_ntoa(rte->nexthop)); | |
045c5389 | 1228 | rip_peer_bad_route(rip, from); |
d62a17ae | 1229 | continue; |
1230 | } | |
718e3744 | 1231 | |
d62a17ae | 1232 | /* That is, if the provided information is ignored, a possibly |
1233 | sub-optimal, but absolutely valid, route may be taken. If | |
1234 | the received Next Hop is not directly reachable, it should be | |
1235 | treated as 0.0.0.0. */ | |
1236 | if (packet->version == RIPv2 && rte->nexthop.s_addr != 0) { | |
d7c0a89a | 1237 | uint32_t addrval; |
d62a17ae | 1238 | |
1239 | /* Multicast address check. */ | |
1240 | addrval = ntohl(rte->nexthop.s_addr); | |
1241 | if (IN_CLASSD(addrval)) { | |
1242 | zlog_info( | |
1243 | "Nexthop %s is multicast address, skip this rte", | |
1244 | inet_ntoa(rte->nexthop)); | |
1245 | continue; | |
1246 | } | |
1247 | ||
1248 | if (!if_lookup_address((void *)&rte->nexthop, AF_INET, | |
ae7b826a | 1249 | rip->vrf->vrf_id)) { |
d62a17ae | 1250 | struct route_node *rn; |
1251 | struct rip_info *rinfo; | |
1252 | ||
1253 | rn = route_node_match_ipv4(rip->table, | |
1254 | &rte->nexthop); | |
1255 | ||
1256 | if (rn) { | |
1257 | rinfo = rn->info; | |
1258 | ||
1259 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1260 | && rinfo->sub_type | |
1261 | == RIP_ROUTE_RTE) { | |
1262 | if (IS_RIP_DEBUG_EVENT) | |
1263 | zlog_debug( | |
1264 | "Next hop %s is on RIP network. Set nexthop to the packet's originator", | |
1265 | inet_ntoa( | |
1266 | rte->nexthop)); | |
1267 | rte->nexthop = rinfo->from; | |
1268 | } else { | |
1269 | if (IS_RIP_DEBUG_EVENT) | |
1270 | zlog_debug( | |
1271 | "Next hop %s is not directly reachable. Treat it as 0.0.0.0", | |
1272 | inet_ntoa( | |
1273 | rte->nexthop)); | |
1274 | rte->nexthop.s_addr = 0; | |
1275 | } | |
1276 | ||
1277 | route_unlock_node(rn); | |
1278 | } else { | |
1279 | if (IS_RIP_DEBUG_EVENT) | |
1280 | zlog_debug( | |
1281 | "Next hop %s is not directly reachable. Treat it as 0.0.0.0", | |
1282 | inet_ntoa( | |
1283 | rte->nexthop)); | |
1284 | rte->nexthop.s_addr = 0; | |
1285 | } | |
1286 | } | |
1287 | } | |
718e3744 | 1288 | |
d62a17ae | 1289 | /* For RIPv1, there won't be a valid netmask. |
1290 | ||
1291 | This is a best guess at the masks. If everyone was using old | |
1292 | Ciscos before the 'ip subnet zero' option, it would be almost | |
1293 | right too :-) | |
1294 | ||
0437e105 | 1295 | Cisco summarize ripv1 advertisements to the classful boundary |
d62a17ae | 1296 | (/16 for class B's) except when the RIP packet does to inside |
1297 | the classful network in question. */ | |
1298 | ||
1299 | if ((packet->version == RIPv1 && rte->prefix.s_addr != 0) | |
1300 | || (packet->version == RIPv2 | |
1301 | && (rte->prefix.s_addr != 0 | |
1302 | && rte->mask.s_addr == 0))) { | |
d7c0a89a | 1303 | uint32_t destination; |
d62a17ae | 1304 | |
1305 | if (subnetted == -1) { | |
1306 | memcpy(&ifaddr, ifc->address, | |
1307 | sizeof(struct prefix_ipv4)); | |
1308 | memcpy(&ifaddrclass, &ifaddr, | |
1309 | sizeof(struct prefix_ipv4)); | |
1310 | apply_classful_mask_ipv4(&ifaddrclass); | |
1311 | subnetted = 0; | |
1312 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1313 | subnetted = 1; | |
1314 | } | |
1315 | ||
1316 | destination = ntohl(rte->prefix.s_addr); | |
1317 | ||
1318 | if (IN_CLASSA(destination)) | |
1319 | masklen2ip(8, &rte->mask); | |
1320 | else if (IN_CLASSB(destination)) | |
1321 | masklen2ip(16, &rte->mask); | |
1322 | else if (IN_CLASSC(destination)) | |
1323 | masklen2ip(24, &rte->mask); | |
1324 | ||
1325 | if (subnetted == 1) | |
1326 | masklen2ip(ifaddrclass.prefixlen, | |
1327 | (struct in_addr *)&destination); | |
1328 | if ((subnetted == 1) | |
1329 | && ((rte->prefix.s_addr & destination) | |
1330 | == ifaddrclass.prefix.s_addr)) { | |
1331 | masklen2ip(ifaddr.prefixlen, &rte->mask); | |
1332 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1333 | != rte->prefix.s_addr) | |
1334 | masklen2ip(32, &rte->mask); | |
1335 | if (IS_RIP_DEBUG_EVENT) | |
1336 | zlog_debug("Subnetted route %s", | |
1337 | inet_ntoa(rte->prefix)); | |
1338 | } else { | |
1339 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1340 | != rte->prefix.s_addr) | |
1341 | continue; | |
1342 | } | |
1343 | ||
1344 | if (IS_RIP_DEBUG_EVENT) { | |
1345 | zlog_debug("Resultant route %s", | |
1346 | inet_ntoa(rte->prefix)); | |
1347 | zlog_debug("Resultant mask %s", | |
1348 | inet_ntoa(rte->mask)); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1353 | ignore the entry. */ | |
1354 | if ((packet->version == RIPv2) && (rte->mask.s_addr != 0) | |
1355 | && ((rte->prefix.s_addr & rte->mask.s_addr) | |
1356 | != rte->prefix.s_addr)) { | |
1357 | zlog_warn( | |
1358 | "RIPv2 address %s is not mask /%d applied one", | |
1359 | inet_ntoa(rte->prefix), ip_masklen(rte->mask)); | |
045c5389 | 1360 | rip_peer_bad_route(rip, from); |
d62a17ae | 1361 | continue; |
1362 | } | |
1363 | ||
1364 | /* Default route's netmask is ignored. */ | |
1365 | if (packet->version == RIPv2 && (rte->prefix.s_addr == 0) | |
1366 | && (rte->mask.s_addr != 0)) { | |
1367 | if (IS_RIP_DEBUG_EVENT) | |
1368 | zlog_debug( | |
1369 | "Default route with non-zero netmask. Set zero to netmask"); | |
1370 | rte->mask.s_addr = 0; | |
1371 | } | |
1372 | ||
1373 | /* Routing table updates. */ | |
1374 | rip_rte_process(rte, from, ifc->ifp); | |
718e3744 | 1375 | } |
718e3744 | 1376 | } |
1377 | ||
a4e987e0 | 1378 | /* Make socket for RIP protocol. */ |
ae7b826a | 1379 | int rip_create_socket(struct vrf *vrf) |
d62a17ae | 1380 | { |
1381 | int ret; | |
1382 | int sock; | |
1383 | struct sockaddr_in addr; | |
ae7b826a | 1384 | const char *vrf_dev = NULL; |
d62a17ae | 1385 | |
1386 | memset(&addr, 0, sizeof(struct sockaddr_in)); | |
1387 | addr.sin_family = AF_INET; | |
1388 | addr.sin_addr.s_addr = INADDR_ANY; | |
6f0e3f6e | 1389 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1390 | addr.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1391 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
d62a17ae | 1392 | /* sending port must always be the RIP port */ |
1393 | addr.sin_port = htons(RIP_PORT_DEFAULT); | |
1394 | ||
1395 | /* Make datagram socket. */ | |
ae7b826a RW |
1396 | if (vrf->vrf_id != VRF_DEFAULT) |
1397 | vrf_dev = vrf->name; | |
0cf6db21 | 1398 | frr_with_privs(&ripd_privs) { |
ae7b826a RW |
1399 | sock = vrf_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, vrf->vrf_id, |
1400 | vrf_dev); | |
1401 | if (sock < 0) { | |
1402 | flog_err_sys(EC_LIB_SOCKET, | |
1403 | "Cannot create UDP socket: %s", | |
1404 | safe_strerror(errno)); | |
1405 | return -1; | |
1406 | } | |
d62a17ae | 1407 | } |
1408 | ||
1409 | sockopt_broadcast(sock); | |
1410 | sockopt_reuseaddr(sock); | |
1411 | sockopt_reuseport(sock); | |
1412 | setsockopt_ipv4_multicast_loop(sock, 0); | |
78b31d5c | 1413 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 1414 | setsockopt_ipv4_tos(sock, IPTOS_PREC_INTERNETCONTROL); |
78b31d5c | 1415 | #endif |
338b8e91 | 1416 | setsockopt_so_recvbuf(sock, RIP_UDP_RCV_BUF); |
a4e987e0 | 1417 | |
0cf6db21 | 1418 | frr_with_privs(&ripd_privs) { |
633fc9b1 DL |
1419 | if ((ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr))) |
1420 | < 0) { | |
01b9e3fd | 1421 | zlog_err("%s: Can't bind socket %d to %s port %d: %s", |
633fc9b1 DL |
1422 | __func__, sock, inet_ntoa(addr.sin_addr), |
1423 | (int)ntohs(addr.sin_port), | |
1424 | safe_strerror(errno)); | |
d62a17ae | 1425 | |
01b9e3fd DL |
1426 | close(sock); |
1427 | return ret; | |
1428 | } | |
01b9e3fd | 1429 | } |
d62a17ae | 1430 | |
1431 | return sock; | |
a4e987e0 | 1432 | } |
1433 | ||
c49ad8f1 | 1434 | /* RIP packet send to destination address, on interface denoted by |
1435 | * by connected argument. NULL to argument denotes destination should be | |
1436 | * should be RIP multicast group | |
1437 | */ | |
d7c0a89a | 1438 | static int rip_send_packet(uint8_t *buf, int size, struct sockaddr_in *to, |
d62a17ae | 1439 | struct connected *ifc) |
1440 | { | |
045c5389 RW |
1441 | struct rip_interface *ri; |
1442 | struct rip *rip; | |
d62a17ae | 1443 | int ret; |
1444 | struct sockaddr_in sin; | |
e35356af RW |
1445 | struct msghdr msg; |
1446 | struct iovec iov; | |
1447 | #ifdef GNU_LINUX | |
1448 | struct cmsghdr *cmsgptr; | |
1449 | char adata[256] = {}; | |
1450 | struct in_pktinfo *pkt; | |
1451 | #endif /* GNU_LINUX */ | |
d62a17ae | 1452 | |
1453 | assert(ifc != NULL); | |
045c5389 RW |
1454 | ri = ifc->ifp->info; |
1455 | rip = ri->rip; | |
d62a17ae | 1456 | |
1457 | if (IS_RIP_DEBUG_PACKET) { | |
f69bd9da | 1458 | #define ADDRESS_SIZE 20 |
d62a17ae | 1459 | char dst[ADDRESS_SIZE]; |
d62a17ae | 1460 | |
1461 | if (to) { | |
5c84f238 | 1462 | strlcpy(dst, inet_ntoa(to->sin_addr), sizeof(dst)); |
d62a17ae | 1463 | } else { |
1464 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
5c84f238 | 1465 | strlcpy(dst, inet_ntoa(sin.sin_addr), sizeof(dst)); |
d62a17ae | 1466 | } |
f69bd9da | 1467 | #undef ADDRESS_SIZE |
d62a17ae | 1468 | zlog_debug("rip_send_packet %s > %s (%s)", |
1469 | inet_ntoa(ifc->address->u.prefix4), dst, | |
1470 | ifc->ifp->name); | |
1471 | } | |
1472 | ||
1473 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) { | |
1474 | /* | |
1475 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is | |
1476 | * configured | |
1477 | * with multiple addresses on the same subnet: the first address | |
1478 | * on the subnet is configured "primary", and all subsequent | |
1479 | * addresses | |
1480 | * on that subnet are treated as "secondary" addresses. | |
1481 | * In order to avoid routing-table bloat on other rip listeners, | |
1482 | * we do not send out RIP packets with ZEBRA_IFA_SECONDARY | |
1483 | * source addrs. | |
1484 | * XXX Since Linux is the only system for which the | |
1485 | * ZEBRA_IFA_SECONDARY | |
1486 | * flag is set, we would end up sending a packet for a | |
1487 | * "secondary" | |
1488 | * source address on non-linux systems. | |
1489 | */ | |
1490 | if (IS_RIP_DEBUG_PACKET) | |
1491 | zlog_debug("duplicate dropped"); | |
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | /* Make destination address. */ | |
1496 | memset(&sin, 0, sizeof(struct sockaddr_in)); | |
1497 | sin.sin_family = AF_INET; | |
6f0e3f6e | 1498 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1499 | sin.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1500 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 1501 | |
d62a17ae | 1502 | /* When destination is specified, use it's port and address. */ |
1503 | if (to) { | |
1504 | sin.sin_port = to->sin_port; | |
1505 | sin.sin_addr = to->sin_addr; | |
1506 | } else { | |
1507 | sin.sin_port = htons(RIP_PORT_DEFAULT); | |
1508 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
ae735d2d | 1509 | |
d62a17ae | 1510 | rip_interface_multicast_set(rip->sock, ifc); |
1511 | } | |
718e3744 | 1512 | |
e35356af RW |
1513 | memset(&msg, 0, sizeof(msg)); |
1514 | msg.msg_name = (void *)&sin; | |
1515 | msg.msg_namelen = sizeof(struct sockaddr_in); | |
1516 | msg.msg_iov = &iov; | |
1517 | msg.msg_iovlen = 1; | |
1518 | iov.iov_base = buf; | |
1519 | iov.iov_len = size; | |
1520 | ||
1521 | #ifdef GNU_LINUX | |
1522 | msg.msg_control = (void *)adata; | |
1523 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in_pktinfo)); | |
1524 | ||
1525 | cmsgptr = (struct cmsghdr *)adata; | |
1526 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); | |
1527 | cmsgptr->cmsg_level = IPPROTO_IP; | |
1528 | cmsgptr->cmsg_type = IP_PKTINFO; | |
1529 | pkt = (struct in_pktinfo *)CMSG_DATA(cmsgptr); | |
1530 | pkt->ipi_ifindex = ifc->ifp->ifindex; | |
1531 | #endif /* GNU_LINUX */ | |
1532 | ||
1533 | ret = sendmsg(rip->sock, &msg, 0); | |
718e3744 | 1534 | |
d62a17ae | 1535 | if (IS_RIP_DEBUG_EVENT) |
1536 | zlog_debug("SEND to %s.%d", inet_ntoa(sin.sin_addr), | |
1537 | ntohs(sin.sin_port)); | |
718e3744 | 1538 | |
d62a17ae | 1539 | if (ret < 0) |
1540 | zlog_warn("can't send packet : %s", safe_strerror(errno)); | |
718e3744 | 1541 | |
d62a17ae | 1542 | return ret; |
718e3744 | 1543 | } |
1544 | ||
1545 | /* Add redistributed route to RIP table. */ | |
045c5389 RW |
1546 | void rip_redistribute_add(struct rip *rip, int type, int sub_type, |
1547 | struct prefix_ipv4 *p, struct nexthop *nh, | |
1548 | unsigned int metric, unsigned char distance, | |
1549 | route_tag_t tag) | |
d62a17ae | 1550 | { |
1551 | int ret; | |
1552 | struct route_node *rp = NULL; | |
1553 | struct rip_info *rinfo = NULL, newinfo; | |
1554 | struct list *list = NULL; | |
1555 | ||
1556 | /* Redistribute route */ | |
1557 | ret = rip_destination_check(p->prefix); | |
1558 | if (!ret) | |
1559 | return; | |
1560 | ||
1561 | rp = route_node_get(rip->table, (struct prefix *)p); | |
1562 | ||
1563 | memset(&newinfo, 0, sizeof(struct rip_info)); | |
1564 | newinfo.type = type; | |
1565 | newinfo.sub_type = sub_type; | |
d62a17ae | 1566 | newinfo.metric = 1; |
1567 | newinfo.external_metric = metric; | |
1568 | newinfo.distance = distance; | |
1569 | if (tag <= UINT16_MAX) /* RIP only supports 16 bit tags */ | |
1570 | newinfo.tag = tag; | |
1571 | newinfo.rp = rp; | |
3f5682c8 | 1572 | newinfo.nh = *nh; |
d62a17ae | 1573 | |
1574 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
1575 | rinfo = listgetdata(listhead(list)); | |
1576 | ||
1577 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
1578 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1579 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
1580 | route_unlock_node(rp); | |
1581 | return; | |
1582 | } | |
718e3744 | 1583 | |
d62a17ae | 1584 | /* Manually configured RIP route check. */ |
1585 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1586 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
1587 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT))) { | |
1588 | if (type != ZEBRA_ROUTE_RIP | |
1589 | || ((sub_type != RIP_ROUTE_STATIC) | |
1590 | && (sub_type != RIP_ROUTE_DEFAULT))) { | |
1591 | route_unlock_node(rp); | |
1592 | return; | |
1593 | } | |
1594 | } | |
1595 | ||
045c5389 | 1596 | (void)rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 1597 | route_unlock_node(rp); |
1598 | } else | |
045c5389 | 1599 | (void)rip_ecmp_add(rip, &newinfo); |
d62a17ae | 1600 | |
1601 | if (IS_RIP_DEBUG_EVENT) { | |
996c9314 LB |
1602 | zlog_debug("Redistribute new prefix %s/%d", |
1603 | inet_ntoa(p->prefix), p->prefixlen); | |
718e3744 | 1604 | } |
1605 | ||
045c5389 | 1606 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 1607 | } |
1608 | ||
1609 | /* Delete redistributed route from RIP table. */ | |
045c5389 RW |
1610 | void rip_redistribute_delete(struct rip *rip, int type, int sub_type, |
1611 | struct prefix_ipv4 *p, ifindex_t ifindex) | |
d62a17ae | 1612 | { |
1613 | int ret; | |
1614 | struct route_node *rp; | |
1615 | struct rip_info *rinfo; | |
1616 | ||
1617 | ret = rip_destination_check(p->prefix); | |
1618 | if (!ret) | |
1619 | return; | |
1620 | ||
1621 | rp = route_node_lookup(rip->table, (struct prefix *)p); | |
1622 | if (rp) { | |
1623 | struct list *list = rp->info; | |
1624 | ||
1625 | if (list != NULL && listcount(list) != 0) { | |
1626 | rinfo = listgetdata(listhead(list)); | |
1627 | if (rinfo != NULL && rinfo->type == type | |
1628 | && rinfo->sub_type == sub_type | |
dd127197 | 1629 | && rinfo->nh.ifindex == ifindex) { |
d62a17ae | 1630 | /* Perform poisoned reverse. */ |
1631 | rinfo->metric = RIP_METRIC_INFINITY; | |
1632 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
1633 | rip_garbage_collect, | |
1634 | rip->garbage_time); | |
1635 | RIP_TIMER_OFF(rinfo->t_timeout); | |
1636 | rinfo->flags |= RIP_RTF_CHANGED; | |
1637 | ||
1638 | if (IS_RIP_DEBUG_EVENT) | |
1639 | zlog_debug( | |
14aa0c3d | 1640 | "Poison %s/%d on the interface %s with an " |
d62a17ae | 1641 | "infinity metric [delete]", |
1642 | inet_ntoa(p->prefix), | |
1643 | p->prefixlen, | |
ae7b826a RW |
1644 | ifindex2ifname( |
1645 | ifindex, | |
1646 | rip->vrf->vrf_id)); | |
d62a17ae | 1647 | |
045c5389 | 1648 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 1649 | } |
1650 | } | |
1651 | route_unlock_node(rp); | |
1652 | } | |
718e3744 | 1653 | } |
1654 | ||
1655 | /* Response to request called from rip_read ().*/ | |
d62a17ae | 1656 | static void rip_request_process(struct rip_packet *packet, int size, |
1657 | struct sockaddr_in *from, struct connected *ifc) | |
1658 | { | |
045c5389 | 1659 | struct rip *rip; |
d62a17ae | 1660 | caddr_t lim; |
1661 | struct rte *rte; | |
1662 | struct prefix_ipv4 p; | |
1663 | struct route_node *rp; | |
1664 | struct rip_info *rinfo; | |
1665 | struct rip_interface *ri; | |
1666 | ||
1667 | /* Does not reponse to the requests on the loopback interfaces */ | |
1668 | if (if_is_loopback(ifc->ifp)) | |
1669 | return; | |
1670 | ||
1671 | /* Check RIP process is enabled on this interface. */ | |
1672 | ri = ifc->ifp->info; | |
1673 | if (!ri->running) | |
1674 | return; | |
045c5389 | 1675 | rip = ri->rip; |
d62a17ae | 1676 | |
1677 | /* When passive interface is specified, suppress responses */ | |
1678 | if (ri->passive) | |
1679 | return; | |
1680 | ||
1681 | /* RIP peer update. */ | |
045c5389 | 1682 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1683 | |
1684 | lim = ((caddr_t)packet) + size; | |
1685 | rte = packet->rte; | |
1686 | ||
1687 | /* The Request is processed entry by entry. If there are no | |
1688 | entries, no response is given. */ | |
1689 | if (lim == (caddr_t)rte) | |
1690 | return; | |
1691 | ||
1692 | /* There is one special case. If there is exactly one entry in the | |
1693 | request, and it has an address family identifier of zero and a | |
1694 | metric of infinity (i.e., 16), then this is a request to send the | |
1695 | entire routing table. */ | |
1696 | if (lim == ((caddr_t)(rte + 1)) && ntohs(rte->family) == 0 | |
1697 | && ntohl(rte->metric) == RIP_METRIC_INFINITY) { | |
1698 | /* All route with split horizon */ | |
1699 | rip_output_process(ifc, from, rip_all_route, packet->version); | |
1700 | } else { | |
1701 | if (ntohs(rte->family) != AF_INET) | |
1702 | return; | |
1703 | ||
1704 | /* Examine the list of RTEs in the Request one by one. For each | |
1705 | entry, look up the destination in the router's routing | |
1706 | database and, if there is a route, put that route's metric in | |
1707 | the metric field of the RTE. If there is no explicit route | |
1708 | to the specified destination, put infinity in the metric | |
1709 | field. Once all the entries have been filled in, change the | |
1710 | command from Request to Response and send the datagram back | |
1711 | to the requestor. */ | |
1712 | p.family = AF_INET; | |
1713 | ||
1714 | for (; ((caddr_t)rte) < lim; rte++) { | |
1715 | p.prefix = rte->prefix; | |
1716 | p.prefixlen = ip_masklen(rte->mask); | |
1717 | apply_mask_ipv4(&p); | |
1718 | ||
1719 | rp = route_node_lookup(rip->table, (struct prefix *)&p); | |
1720 | if (rp) { | |
1721 | rinfo = listgetdata( | |
1722 | listhead((struct list *)rp->info)); | |
1723 | rte->metric = htonl(rinfo->metric); | |
1724 | route_unlock_node(rp); | |
1725 | } else | |
1726 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
1727 | } | |
1728 | packet->command = RIP_RESPONSE; | |
4e054866 | 1729 | |
b2608623 | 1730 | (void)rip_send_packet((uint8_t *)packet, size, from, ifc); |
d62a17ae | 1731 | } |
c08a2107 | 1732 | rip->counters.queries++; |
718e3744 | 1733 | } |
1734 | ||
718e3744 | 1735 | /* First entry point of RIP packet. */ |
d62a17ae | 1736 | static int rip_read(struct thread *t) |
1737 | { | |
045c5389 | 1738 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 1739 | int sock; |
1740 | int ret; | |
1741 | int rtenum; | |
1742 | union rip_buf rip_buf; | |
1743 | struct rip_packet *packet; | |
1744 | struct sockaddr_in from; | |
1745 | int len; | |
1746 | int vrecv; | |
1747 | socklen_t fromlen; | |
1748 | struct interface *ifp = NULL; | |
1749 | struct connected *ifc; | |
1750 | struct rip_interface *ri; | |
1751 | struct prefix p; | |
1752 | ||
1753 | /* Fetch socket then register myself. */ | |
1754 | sock = THREAD_FD(t); | |
1755 | rip->t_read = NULL; | |
1756 | ||
1757 | /* Add myself to tne next event */ | |
045c5389 | 1758 | rip_event(rip, RIP_READ, sock); |
d62a17ae | 1759 | |
1760 | /* RIPd manages only IPv4. */ | |
1761 | memset(&from, 0, sizeof(struct sockaddr_in)); | |
1762 | fromlen = sizeof(struct sockaddr_in); | |
1763 | ||
1764 | len = recvfrom(sock, (char *)&rip_buf.buf, sizeof(rip_buf.buf), 0, | |
1765 | (struct sockaddr *)&from, &fromlen); | |
1766 | if (len < 0) { | |
ae7b826a RW |
1767 | zlog_info("recvfrom failed (VRF %s): %s", rip->vrf_name, |
1768 | safe_strerror(errno)); | |
d62a17ae | 1769 | return len; |
1770 | } | |
1771 | ||
1772 | /* Check is this packet comming from myself? */ | |
045c5389 | 1773 | if (if_check_address(rip, from.sin_addr)) { |
d62a17ae | 1774 | if (IS_RIP_DEBUG_PACKET) |
ae7b826a RW |
1775 | zlog_debug("ignore packet comes from myself (VRF %s)", |
1776 | rip->vrf_name); | |
d62a17ae | 1777 | return -1; |
1778 | } | |
1779 | ||
1780 | /* Which interface is this packet comes from. */ | |
ae7b826a RW |
1781 | ifc = if_lookup_address((void *)&from.sin_addr, AF_INET, |
1782 | rip->vrf->vrf_id); | |
d62a17ae | 1783 | if (ifc) |
1784 | ifp = ifc->ifp; | |
1785 | ||
1786 | /* RIP packet received */ | |
1787 | if (IS_RIP_DEBUG_EVENT) | |
ae7b826a | 1788 | zlog_debug("RECV packet from %s port %d on %s (VRF %s)", |
d62a17ae | 1789 | inet_ntoa(from.sin_addr), ntohs(from.sin_port), |
ae7b826a | 1790 | ifp ? ifp->name : "unknown", rip->vrf_name); |
d62a17ae | 1791 | |
1792 | /* If this packet come from unknown interface, ignore it. */ | |
1793 | if (ifp == NULL) { | |
1794 | zlog_info( | |
ae7b826a RW |
1795 | "rip_read: cannot find interface for packet from %s port %d (VRF %s)", |
1796 | inet_ntoa(from.sin_addr), ntohs(from.sin_port), | |
1797 | rip->vrf_name); | |
d62a17ae | 1798 | return -1; |
1799 | } | |
1800 | ||
1801 | p.family = AF_INET; | |
1802 | p.u.prefix4 = from.sin_addr; | |
1803 | p.prefixlen = IPV4_MAX_BITLEN; | |
1804 | ||
1805 | ifc = connected_lookup_prefix(ifp, &p); | |
1806 | ||
1807 | if (ifc == NULL) { | |
1808 | zlog_info( | |
1809 | "rip_read: cannot find connected address for packet from %s " | |
ae7b826a | 1810 | "port %d on interface %s (VRF %s)", |
d62a17ae | 1811 | inet_ntoa(from.sin_addr), ntohs(from.sin_port), |
ae7b826a | 1812 | ifp->name, rip->vrf_name); |
d62a17ae | 1813 | return -1; |
1814 | } | |
1815 | ||
1816 | /* Packet length check. */ | |
1817 | if (len < RIP_PACKET_MINSIZ) { | |
1818 | zlog_warn("packet size %d is smaller than minimum size %d", len, | |
1819 | RIP_PACKET_MINSIZ); | |
045c5389 | 1820 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1821 | return len; |
1822 | } | |
1823 | if (len > RIP_PACKET_MAXSIZ) { | |
1824 | zlog_warn("packet size %d is larger than max size %d", len, | |
1825 | RIP_PACKET_MAXSIZ); | |
045c5389 | 1826 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1827 | return len; |
1828 | } | |
1829 | ||
1830 | /* Packet alignment check. */ | |
1831 | if ((len - RIP_PACKET_MINSIZ) % 20) { | |
1832 | zlog_warn("packet size %d is wrong for RIP packet alignment", | |
1833 | len); | |
045c5389 | 1834 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1835 | return len; |
1836 | } | |
1837 | ||
1838 | /* Set RTE number. */ | |
1839 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1840 | ||
1841 | /* For easy to handle. */ | |
1842 | packet = &rip_buf.rip_packet; | |
1843 | ||
1844 | /* RIP version check. */ | |
1845 | if (packet->version == 0) { | |
1846 | zlog_info("version 0 with command %d received.", | |
1847 | packet->command); | |
045c5389 | 1848 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1849 | return -1; |
1850 | } | |
1851 | ||
1852 | /* Dump RIP packet. */ | |
1853 | if (IS_RIP_DEBUG_RECV) | |
1854 | rip_packet_dump(packet, len, "RECV"); | |
1855 | ||
1856 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1857 | that "Version 1 implementations are to ignore this extra data and | |
1858 | process only the fields specified in this document.". So RIPv3 | |
1859 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1860 | if (packet->version > RIPv2) | |
1861 | packet->version = RIPv2; | |
1862 | ||
1863 | /* Is RIP running or is this RIP neighbor ?*/ | |
1864 | ri = ifp->info; | |
045c5389 | 1865 | if (!ri->running && !rip_neighbor_lookup(rip, &from)) { |
d62a17ae | 1866 | if (IS_RIP_DEBUG_EVENT) |
1867 | zlog_debug("RIP is not enabled on interface %s.", | |
1868 | ifp->name); | |
045c5389 | 1869 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1870 | return -1; |
1871 | } | |
1872 | ||
1873 | /* RIP Version check. RFC2453, 4.6 and 5.1 */ | |
1874 | vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? rip->version_recv | |
1875 | : ri->ri_receive); | |
1876 | if (vrecv == RI_RIP_VERSION_NONE | |
1877 | || ((packet->version == RIPv1) && !(vrecv & RIPv1)) | |
1878 | || ((packet->version == RIPv2) && !(vrecv & RIPv2))) { | |
1879 | if (IS_RIP_DEBUG_PACKET) | |
1880 | zlog_debug( | |
1881 | " packet's v%d doesn't fit to if version spec", | |
1882 | packet->version); | |
045c5389 | 1883 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1884 | return -1; |
1885 | } | |
1886 | ||
1887 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 | |
1888 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
1889 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
1890 | if ((ri->auth_type == RIP_NO_AUTH) && rtenum | |
1891 | && (packet->version == RIPv2) | |
1892 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) { | |
1893 | if (IS_RIP_DEBUG_EVENT) | |
1894 | zlog_debug( | |
1895 | "packet RIPv%d is dropped because authentication disabled", | |
1896 | packet->version); | |
fe339c95 | 1897 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1898 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1899 | return -1; |
1900 | } | |
1901 | ||
1902 | /* RFC: | |
1903 | If the router is configured to authenticate RIP-2 messages, then | |
1904 | RIP-1 messages and RIP-2 messages which pass authentication | |
1905 | testing shall be accepted; unauthenticated and failed | |
1906 | authentication RIP-2 messages shall be discarded. For maximum | |
1907 | security, RIP-1 messages should be ignored when authentication is | |
1908 | in use (see section 4.1); otherwise, the routing information from | |
1909 | authenticated messages will be propagated by RIP-1 routers in an | |
1910 | unauthenticated manner. | |
1911 | */ | |
1912 | /* We make an exception for RIPv1 REQUEST packets, to which we'll | |
1913 | * always reply regardless of authentication settings, because: | |
1914 | * | |
1915 | * - if there other authorised routers on-link, the REQUESTor can | |
1916 | * passively obtain the routing updates anyway | |
1917 | * - if there are no other authorised routers on-link, RIP can | |
1918 | * easily be disabled for the link to prevent giving out information | |
1919 | * on state of this routers RIP routing table.. | |
1920 | * | |
1921 | * I.e. if RIPv1 has any place anymore these days, it's as a very | |
1922 | * simple way to distribute routing information (e.g. to embedded | |
1923 | * hosts / appliances) and the ability to give out RIPv1 | |
1924 | * routing-information freely, while still requiring RIPv2 | |
1925 | * authentication for any RESPONSEs might be vaguely useful. | |
1926 | */ | |
1927 | if (ri->auth_type != RIP_NO_AUTH && packet->version == RIPv1) { | |
1928 | /* Discard RIPv1 messages other than REQUESTs */ | |
1929 | if (packet->command != RIP_REQUEST) { | |
1930 | if (IS_RIP_DEBUG_PACKET) | |
1931 | zlog_debug( | |
1932 | "RIPv1" | |
1933 | " dropped because authentication enabled"); | |
fe339c95 | 1934 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1935 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1936 | return -1; |
1937 | } | |
1938 | } else if (ri->auth_type != RIP_NO_AUTH) { | |
1939 | const char *auth_desc; | |
1940 | ||
1941 | if (rtenum == 0) { | |
1942 | /* There definitely is no authentication in the packet. | |
1943 | */ | |
1944 | if (IS_RIP_DEBUG_PACKET) | |
1945 | zlog_debug( | |
1946 | "RIPv2 authentication failed: no auth RTE in packet"); | |
fe339c95 | 1947 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1948 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1949 | return -1; |
1950 | } | |
1951 | ||
1952 | /* First RTE must be an Authentication Family RTE */ | |
1953 | if (packet->rte->family != htons(RIP_FAMILY_AUTH)) { | |
1954 | if (IS_RIP_DEBUG_PACKET) | |
1955 | zlog_debug( | |
1956 | "RIPv2" | |
1957 | " dropped because authentication enabled"); | |
fe339c95 | 1958 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1959 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1960 | return -1; |
1961 | } | |
1962 | ||
1963 | /* Check RIPv2 authentication. */ | |
1964 | switch (ntohs(packet->rte->tag)) { | |
1965 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1966 | auth_desc = "simple"; | |
1967 | ret = rip_auth_simple_password(packet->rte, &from, ifp); | |
1968 | break; | |
1969 | ||
1970 | case RIP_AUTH_MD5: | |
1971 | auth_desc = "MD5"; | |
1972 | ret = rip_auth_md5(packet, &from, len, ifp); | |
1973 | /* Reset RIP packet length to trim MD5 data. */ | |
1974 | len = ret; | |
1975 | break; | |
1976 | ||
1977 | default: | |
1978 | ret = 0; | |
1979 | auth_desc = "unknown type"; | |
1980 | if (IS_RIP_DEBUG_PACKET) | |
1981 | zlog_debug( | |
1982 | "RIPv2 Unknown authentication type %d", | |
1983 | ntohs(packet->rte->tag)); | |
1984 | } | |
1985 | ||
1986 | if (ret) { | |
1987 | if (IS_RIP_DEBUG_PACKET) | |
1988 | zlog_debug("RIPv2 %s authentication success", | |
1989 | auth_desc); | |
1990 | } else { | |
1991 | if (IS_RIP_DEBUG_PACKET) | |
1992 | zlog_debug("RIPv2 %s authentication failure", | |
1993 | auth_desc); | |
fe339c95 | 1994 | ripd_notif_send_auth_failure(ifp->name); |
045c5389 | 1995 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1996 | return -1; |
1997 | } | |
1998 | } | |
1999 | ||
2000 | /* Process each command. */ | |
2001 | switch (packet->command) { | |
2002 | case RIP_RESPONSE: | |
2003 | rip_response_process(packet, len, &from, ifc); | |
2004 | break; | |
2005 | case RIP_REQUEST: | |
2006 | case RIP_POLL: | |
2007 | rip_request_process(packet, len, &from, ifc); | |
2008 | break; | |
2009 | case RIP_TRACEON: | |
2010 | case RIP_TRACEOFF: | |
2011 | zlog_info( | |
2012 | "Obsolete command %s received, please sent it to routed", | |
2013 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 2014 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 2015 | break; |
2016 | case RIP_POLL_ENTRY: | |
2017 | zlog_info("Obsolete command %s received", | |
2018 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 2019 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 2020 | break; |
2021 | default: | |
2022 | zlog_info("Unknown RIP command %d received", packet->command); | |
045c5389 | 2023 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 2024 | break; |
2025 | } | |
2026 | ||
2027 | return len; | |
718e3744 | 2028 | } |
2029 | ||
718e3744 | 2030 | /* Write routing table entry to the stream and return next index of |
2031 | the routing table entry in the stream. */ | |
d62a17ae | 2032 | static int rip_write_rte(int num, struct stream *s, struct prefix_ipv4 *p, |
d7c0a89a | 2033 | uint8_t version, struct rip_info *rinfo) |
d62a17ae | 2034 | { |
2035 | struct in_addr mask; | |
2036 | ||
2037 | /* Write routing table entry. */ | |
2038 | if (version == RIPv1) { | |
2039 | stream_putw(s, AF_INET); | |
2040 | stream_putw(s, 0); | |
2041 | stream_put_ipv4(s, p->prefix.s_addr); | |
2042 | stream_put_ipv4(s, 0); | |
2043 | stream_put_ipv4(s, 0); | |
2044 | stream_putl(s, rinfo->metric_out); | |
2045 | } else { | |
2046 | masklen2ip(p->prefixlen, &mask); | |
2047 | ||
2048 | stream_putw(s, AF_INET); | |
2049 | stream_putw(s, rinfo->tag_out); | |
2050 | stream_put_ipv4(s, p->prefix.s_addr); | |
2051 | stream_put_ipv4(s, mask.s_addr); | |
2052 | stream_put_ipv4(s, rinfo->nexthop_out.s_addr); | |
2053 | stream_putl(s, rinfo->metric_out); | |
2054 | } | |
2055 | ||
2056 | return ++num; | |
718e3744 | 2057 | } |
2058 | ||
2059 | /* Send update to the ifp or spcified neighbor. */ | |
d62a17ae | 2060 | void rip_output_process(struct connected *ifc, struct sockaddr_in *to, |
d7c0a89a | 2061 | int route_type, uint8_t version) |
d62a17ae | 2062 | { |
045c5389 | 2063 | struct rip *rip; |
d62a17ae | 2064 | int ret; |
2065 | struct stream *s; | |
2066 | struct route_node *rp; | |
2067 | struct rip_info *rinfo; | |
2068 | struct rip_interface *ri; | |
2069 | struct prefix_ipv4 *p; | |
2070 | struct prefix_ipv4 classfull; | |
2071 | struct prefix_ipv4 ifaddrclass; | |
2072 | struct key *key = NULL; | |
2073 | /* this might need to made dynamic if RIP ever supported auth methods | |
2074 | with larger key string sizes */ | |
2075 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
2076 | size_t doff = 0; /* offset of digest offset field */ | |
2077 | int num = 0; | |
2078 | int rtemax; | |
2079 | int subnetted = 0; | |
2080 | struct list *list = NULL; | |
2081 | struct listnode *listnode = NULL; | |
2082 | ||
2083 | /* Logging output event. */ | |
2084 | if (IS_RIP_DEBUG_EVENT) { | |
2085 | if (to) | |
2086 | zlog_debug("update routes to neighbor %s", | |
2087 | inet_ntoa(to->sin_addr)); | |
2088 | else | |
2089 | zlog_debug("update routes on interface %s ifindex %d", | |
2090 | ifc->ifp->name, ifc->ifp->ifindex); | |
2091 | } | |
718e3744 | 2092 | |
045c5389 RW |
2093 | /* Get RIP interface. */ |
2094 | ri = ifc->ifp->info; | |
2095 | rip = ri->rip; | |
2096 | ||
d62a17ae | 2097 | /* Set output stream. */ |
2098 | s = rip->obuf; | |
2099 | ||
2100 | /* Reset stream and RTE counter. */ | |
2101 | stream_reset(s); | |
2102 | rtemax = RIP_MAX_RTE; | |
2103 | ||
d62a17ae | 2104 | /* If output interface is in simple password authentication mode, we |
2105 | need space for authentication data. */ | |
2106 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2107 | rtemax -= 1; | |
2108 | ||
2109 | /* If output interface is in MD5 authentication mode, we need space | |
2110 | for authentication header and data. */ | |
2111 | if (ri->auth_type == RIP_AUTH_MD5) | |
2112 | rtemax -= 2; | |
2113 | ||
2114 | /* If output interface is in simple password authentication mode | |
2115 | and string or keychain is specified we need space for auth. data */ | |
2116 | if (ri->auth_type != RIP_NO_AUTH) { | |
2117 | if (ri->key_chain) { | |
2118 | struct keychain *keychain; | |
2119 | ||
2120 | keychain = keychain_lookup(ri->key_chain); | |
2121 | if (keychain) | |
2122 | key = key_lookup_for_send(keychain); | |
2123 | } | |
2124 | /* to be passed to auth functions later */ | |
5c84f238 | 2125 | rip_auth_prepare_str_send(ri, key, auth_str, sizeof(auth_str)); |
558c6842 | 2126 | if (strlen(auth_str) == 0) |
2127 | return; | |
d62a17ae | 2128 | } |
2129 | ||
2130 | if (version == RIPv1) { | |
2131 | memcpy(&ifaddrclass, ifc->address, sizeof(struct prefix_ipv4)); | |
2132 | apply_classful_mask_ipv4(&ifaddrclass); | |
2133 | subnetted = 0; | |
2134 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) | |
2135 | subnetted = 1; | |
2136 | } | |
2137 | ||
2138 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) | |
2139 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
2140 | rinfo = listgetdata(listhead(list)); | |
2141 | /* For RIPv1, if we are subnetted, output subnets in our | |
2142 | * network */ | |
2143 | /* that have the same mask as the output "interface". | |
2144 | * For other */ | |
2145 | /* networks, only the classfull version is output. */ | |
2146 | ||
2147 | if (version == RIPv1) { | |
2148 | p = (struct prefix_ipv4 *)&rp->p; | |
2149 | ||
2150 | if (IS_RIP_DEBUG_PACKET) | |
2151 | zlog_debug( | |
2152 | "RIPv1 mask check, %s/%d considered for output", | |
2153 | inet_ntoa(rp->p.u.prefix4), | |
2154 | rp->p.prefixlen); | |
2155 | ||
2156 | if (subnetted | |
2157 | && prefix_match( | |
2158 | (struct prefix *)&ifaddrclass, | |
2159 | &rp->p)) { | |
2160 | if ((ifc->address->prefixlen | |
2161 | != rp->p.prefixlen) | |
2162 | && (rp->p.prefixlen != 32)) | |
2163 | continue; | |
2164 | } else { | |
2165 | memcpy(&classfull, &rp->p, | |
2166 | sizeof(struct prefix_ipv4)); | |
2167 | apply_classful_mask_ipv4(&classfull); | |
2168 | if (rp->p.u.prefix4.s_addr != 0 | |
2169 | && classfull.prefixlen | |
2170 | != rp->p.prefixlen) | |
2171 | continue; | |
2172 | } | |
2173 | if (IS_RIP_DEBUG_PACKET) | |
2174 | zlog_debug( | |
2175 | "RIPv1 mask check, %s/%d made it through", | |
2176 | inet_ntoa(rp->p.u.prefix4), | |
2177 | rp->p.prefixlen); | |
2178 | } else | |
2179 | p = (struct prefix_ipv4 *)&rp->p; | |
2180 | ||
2181 | /* Apply output filters. */ | |
2182 | ret = rip_filter(RIP_FILTER_OUT, p, ri); | |
2183 | if (ret < 0) | |
2184 | continue; | |
2185 | ||
2186 | /* Changed route only output. */ | |
2187 | if (route_type == rip_changed_route | |
2188 | && (!(rinfo->flags & RIP_RTF_CHANGED))) | |
2189 | continue; | |
2190 | ||
2191 | /* Split horizon. */ | |
2192 | /* if (split_horizon == rip_split_horizon) */ | |
2193 | if (ri->split_horizon == RIP_SPLIT_HORIZON) { | |
2194 | /* | |
2195 | * We perform split horizon for RIP and | |
2196 | * connected route. | |
2197 | * For rip routes, we want to suppress the route | |
2198 | * if we would | |
2199 | * end up sending the route back on the | |
2200 | * interface that we | |
2201 | * learned it from, with a higher metric. For | |
2202 | * connected routes, | |
2203 | * we suppress the route if the prefix is a | |
2204 | * subset of the | |
2205 | * source address that we are going to use for | |
2206 | * the packet | |
2207 | * (in order to handle the case when multiple | |
2208 | * subnets are | |
2209 | * configured on the same interface). | |
2210 | */ | |
2211 | int suppress = 0; | |
2212 | struct rip_info *tmp_rinfo = NULL; | |
9920df07 | 2213 | struct connected *tmp_ifc = NULL; |
d62a17ae | 2214 | |
2215 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
2216 | tmp_rinfo)) | |
2217 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP | |
dd127197 | 2218 | && tmp_rinfo->nh.ifindex |
d62a17ae | 2219 | == ifc->ifp->ifindex) { |
2220 | suppress = 1; | |
2221 | break; | |
2222 | } | |
2223 | ||
2224 | if (!suppress | |
9920df07 | 2225 | && rinfo->type == ZEBRA_ROUTE_CONNECT) { |
2226 | for (ALL_LIST_ELEMENTS_RO( | |
2227 | ifc->ifp->connected, | |
2228 | listnode, tmp_ifc)) | |
2229 | if (prefix_match( | |
2230 | (struct prefix *)p, | |
2231 | tmp_ifc->address)) { | |
2232 | suppress = 1; | |
2233 | break; | |
2234 | } | |
2235 | } | |
d62a17ae | 2236 | |
2237 | if (suppress) | |
2238 | continue; | |
2239 | } | |
2240 | ||
2241 | /* Preparation for route-map. */ | |
2242 | rinfo->metric_set = 0; | |
2243 | rinfo->nexthop_out.s_addr = 0; | |
2244 | rinfo->metric_out = rinfo->metric; | |
2245 | rinfo->tag_out = rinfo->tag; | |
2246 | rinfo->ifindex_out = ifc->ifp->ifindex; | |
2247 | ||
2248 | /* In order to avoid some local loops, | |
2249 | * if the RIP route has a nexthop via this interface, | |
2250 | * keep the nexthop, | |
2251 | * otherwise set it to 0. The nexthop should not be | |
2252 | * propagated | |
2253 | * beyond the local broadcast/multicast area in order | |
2254 | * to avoid an IGP multi-level recursive look-up. | |
2255 | * see (4.4) | |
2256 | */ | |
dd127197 DS |
2257 | if (rinfo->nh.ifindex == ifc->ifp->ifindex) |
2258 | rinfo->nexthop_out = rinfo->nh.gate.ipv4; | |
d62a17ae | 2259 | |
2260 | /* Interface route-map */ | |
2261 | if (ri->routemap[RIP_FILTER_OUT]) { | |
2262 | ret = route_map_apply( | |
2263 | ri->routemap[RIP_FILTER_OUT], | |
2264 | (struct prefix *)p, RMAP_RIP, rinfo); | |
2265 | ||
2266 | if (ret == RMAP_DENYMATCH) { | |
2267 | if (IS_RIP_DEBUG_PACKET) | |
2268 | zlog_debug( | |
2269 | "RIP %s/%d is filtered by route-map out", | |
2270 | inet_ntoa(p->prefix), | |
2271 | p->prefixlen); | |
2272 | continue; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | /* Apply redistribute route map - continue, if deny */ | |
f9120f71 | 2277 | if (rip->redist[rinfo->type].route_map.name |
d62a17ae | 2278 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) { |
2279 | ret = route_map_apply( | |
f9120f71 | 2280 | rip->redist[rinfo->type].route_map.map, |
d62a17ae | 2281 | (struct prefix *)p, RMAP_RIP, rinfo); |
2282 | ||
2283 | if (ret == RMAP_DENYMATCH) { | |
2284 | if (IS_RIP_DEBUG_PACKET) | |
2285 | zlog_debug( | |
2286 | "%s/%d is filtered by route-map", | |
2287 | inet_ntoa(p->prefix), | |
2288 | p->prefixlen); | |
2289 | continue; | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | /* When route-map does not set metric. */ | |
2294 | if (!rinfo->metric_set) { | |
2295 | /* If redistribute metric is set. */ | |
f9120f71 | 2296 | if (rip->redist[rinfo->type].metric_config |
d62a17ae | 2297 | && rinfo->metric != RIP_METRIC_INFINITY) { |
2298 | rinfo->metric_out = | |
f9120f71 | 2299 | rip->redist[rinfo->type].metric; |
d62a17ae | 2300 | } else { |
2301 | /* If the route is not connected or | |
2302 | localy generated | |
2303 | one, use default-metric value*/ | |
2304 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
2305 | && rinfo->type | |
2306 | != ZEBRA_ROUTE_CONNECT | |
2307 | && rinfo->metric | |
2308 | != RIP_METRIC_INFINITY) | |
2309 | rinfo->metric_out = | |
2310 | rip->default_metric; | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | /* Apply offset-list */ | |
2315 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
2316 | rip_offset_list_apply_out(p, ifc->ifp, | |
2317 | &rinfo->metric_out); | |
2318 | ||
2319 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2320 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2321 | ||
2322 | /* Perform split-horizon with poisoned reverse | |
2323 | * for RIP and connected routes. | |
2324 | **/ | |
2325 | if (ri->split_horizon | |
2326 | == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
2327 | /* | |
2328 | * We perform split horizon for RIP and | |
2329 | * connected route. | |
2330 | * For rip routes, we want to suppress the route | |
2331 | * if we would | |
2332 | * end up sending the route back on the | |
2333 | * interface that we | |
2334 | * learned it from, with a higher metric. For | |
2335 | * connected routes, | |
2336 | * we suppress the route if the prefix is a | |
2337 | * subset of the | |
2338 | * source address that we are going to use for | |
2339 | * the packet | |
2340 | * (in order to handle the case when multiple | |
2341 | * subnets are | |
2342 | * configured on the same interface). | |
2343 | */ | |
2344 | struct rip_info *tmp_rinfo = NULL; | |
9920df07 | 2345 | struct connected *tmp_ifc = NULL; |
d62a17ae | 2346 | |
2347 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
2348 | tmp_rinfo)) | |
2349 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP | |
dd127197 | 2350 | && tmp_rinfo->nh.ifindex |
996c9314 | 2351 | == ifc->ifp->ifindex) |
9920df07 | 2352 | rinfo->metric_out = |
d62a17ae | 2353 | RIP_METRIC_INFINITY; |
aea175a8 | 2354 | |
9920df07 | 2355 | if (rinfo->metric_out != RIP_METRIC_INFINITY |
2356 | && rinfo->type == ZEBRA_ROUTE_CONNECT) { | |
2357 | for (ALL_LIST_ELEMENTS_RO( | |
2358 | ifc->ifp->connected, | |
2359 | listnode, tmp_ifc)) | |
2360 | if (prefix_match( | |
2361 | (struct prefix *)p, | |
2362 | tmp_ifc->address)) { | |
2363 | rinfo->metric_out = | |
2364 | RIP_METRIC_INFINITY; | |
2365 | break; | |
2366 | } | |
2367 | } | |
d62a17ae | 2368 | } |
2369 | ||
2370 | /* Prepare preamble, auth headers, if needs be */ | |
2371 | if (num == 0) { | |
2372 | stream_putc(s, RIP_RESPONSE); | |
2373 | stream_putc(s, version); | |
2374 | stream_putw(s, 0); | |
2375 | ||
2376 | /* auth header for !v1 && !no_auth */ | |
2377 | if ((ri->auth_type != RIP_NO_AUTH) | |
2378 | && (version != RIPv1)) | |
2379 | doff = rip_auth_header_write( | |
2380 | s, ri, key, auth_str, | |
2381 | RIP_AUTH_SIMPLE_SIZE); | |
2382 | } | |
2383 | ||
2384 | /* Write RTE to the stream. */ | |
2385 | num = rip_write_rte(num, s, p, version, rinfo); | |
2386 | if (num == rtemax) { | |
2387 | if (version == RIPv2 | |
2388 | && ri->auth_type == RIP_AUTH_MD5) | |
2389 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2390 | RIP_AUTH_SIMPLE_SIZE); | |
2391 | ||
2392 | ret = rip_send_packet(STREAM_DATA(s), | |
2393 | stream_get_endp(s), to, | |
2394 | ifc); | |
2395 | ||
2396 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2397 | rip_packet_dump((struct rip_packet *) | |
2398 | STREAM_DATA(s), | |
2399 | stream_get_endp(s), | |
2400 | "SEND"); | |
2401 | num = 0; | |
2402 | stream_reset(s); | |
2403 | } | |
2404 | } | |
2405 | ||
2406 | /* Flush unwritten RTE. */ | |
2407 | if (num != 0) { | |
2408 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
2409 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2410 | RIP_AUTH_SIMPLE_SIZE); | |
2411 | ||
2412 | ret = rip_send_packet(STREAM_DATA(s), stream_get_endp(s), to, | |
2413 | ifc); | |
2414 | ||
2415 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2416 | rip_packet_dump((struct rip_packet *)STREAM_DATA(s), | |
2417 | stream_get_endp(s), "SEND"); | |
2418 | stream_reset(s); | |
2419 | } | |
2420 | ||
2421 | /* Statistics updates. */ | |
2422 | ri->sent_updates++; | |
718e3744 | 2423 | } |
2424 | ||
2425 | /* Send RIP packet to the interface. */ | |
d7c0a89a | 2426 | static void rip_update_interface(struct connected *ifc, uint8_t version, |
d62a17ae | 2427 | int route_type) |
2428 | { | |
2429 | struct interface *ifp = ifc->ifp; | |
2430 | struct rip_interface *ri = ifp->info; | |
2431 | struct sockaddr_in to; | |
2432 | ||
2433 | /* When RIP version is 2 and multicast enable interface. */ | |
2434 | if (version == RIPv2 && !ri->v2_broadcast && if_is_multicast(ifp)) { | |
2435 | if (IS_RIP_DEBUG_EVENT) | |
2436 | zlog_debug("multicast announce on %s ", ifp->name); | |
2437 | ||
2438 | rip_output_process(ifc, NULL, route_type, version); | |
2439 | return; | |
2440 | } | |
2441 | ||
2442 | /* If we can't send multicast packet, send it with unicast. */ | |
2443 | if (if_is_broadcast(ifp) || if_is_pointopoint(ifp)) { | |
2444 | if (ifc->address->family == AF_INET) { | |
2445 | /* Destination address and port setting. */ | |
2446 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2447 | if (ifc->destination) | |
2448 | /* use specified broadcast or peer destination | |
2449 | * addr */ | |
2450 | to.sin_addr = ifc->destination->u.prefix4; | |
2451 | else if (ifc->address->prefixlen < IPV4_MAX_PREFIXLEN) | |
2452 | /* calculate the appropriate broadcast address | |
2453 | */ | |
2454 | to.sin_addr.s_addr = ipv4_broadcast_addr( | |
2455 | ifc->address->u.prefix4.s_addr, | |
2456 | ifc->address->prefixlen); | |
2457 | else | |
2458 | /* do not know where to send the packet */ | |
2459 | return; | |
2460 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2461 | ||
2462 | if (IS_RIP_DEBUG_EVENT) | |
2463 | zlog_debug("%s announce to %s on %s", | |
2464 | CONNECTED_PEER(ifc) ? "unicast" | |
2465 | : "broadcast", | |
2466 | inet_ntoa(to.sin_addr), ifp->name); | |
2467 | ||
2468 | rip_output_process(ifc, &to, route_type, version); | |
2469 | } | |
2470 | } | |
718e3744 | 2471 | } |
2472 | ||
2473 | /* Update send to all interface and neighbor. */ | |
045c5389 | 2474 | static void rip_update_process(struct rip *rip, int route_type) |
d62a17ae | 2475 | { |
d62a17ae | 2476 | struct listnode *ifnode, *ifnnode; |
2477 | struct connected *connected; | |
2478 | struct interface *ifp; | |
2479 | struct rip_interface *ri; | |
2480 | struct route_node *rp; | |
2481 | struct sockaddr_in to; | |
2482 | struct prefix *p; | |
2483 | ||
2484 | /* Send RIP update to each interface. */ | |
ae7b826a | 2485 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 2486 | if (if_is_loopback(ifp)) |
2487 | continue; | |
2488 | ||
2489 | if (!if_is_operative(ifp)) | |
2490 | continue; | |
2491 | ||
2492 | /* Fetch RIP interface information. */ | |
2493 | ri = ifp->info; | |
2494 | ||
2495 | /* When passive interface is specified, suppress announce to the | |
2496 | interface. */ | |
2497 | if (ri->passive) | |
2498 | continue; | |
2499 | ||
2500 | if (ri->running) { | |
2501 | /* | |
2502 | * If there is no version configuration in the | |
2503 | * interface, | |
2504 | * use rip's version setting. | |
2505 | */ | |
2506 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) | |
2507 | ? rip->version_send | |
2508 | : ri->ri_send); | |
2509 | ||
2510 | if (IS_RIP_DEBUG_EVENT) | |
2511 | zlog_debug("SEND UPDATE to %s ifindex %d", | |
2512 | ifp->name, ifp->ifindex); | |
2513 | ||
2514 | /* send update on each connected network */ | |
2515 | for (ALL_LIST_ELEMENTS(ifp->connected, ifnode, ifnnode, | |
2516 | connected)) { | |
2517 | if (connected->address->family == AF_INET) { | |
2518 | if (vsend & RIPv1) | |
2519 | rip_update_interface( | |
2520 | connected, RIPv1, | |
2521 | route_type); | |
2522 | if ((vsend & RIPv2) | |
2523 | && if_is_multicast(ifp)) | |
2524 | rip_update_interface( | |
2525 | connected, RIPv2, | |
2526 | route_type); | |
2527 | } | |
2528 | } | |
2529 | } | |
2530 | } | |
2531 | ||
2532 | /* RIP send updates to each neighbor. */ | |
2533 | for (rp = route_top(rip->neighbor); rp; rp = route_next(rp)) | |
2534 | if (rp->info != NULL) { | |
2535 | p = &rp->p; | |
2536 | ||
2537 | connected = if_lookup_address(&p->u.prefix4, AF_INET, | |
ae7b826a | 2538 | rip->vrf->vrf_id); |
d62a17ae | 2539 | if (!connected) { |
2540 | zlog_warn( | |
0437e105 | 2541 | "Neighbor %s doesn't have connected interface!", |
d62a17ae | 2542 | inet_ntoa(p->u.prefix4)); |
2543 | continue; | |
2544 | } | |
2545 | ||
2546 | /* Set destination address and port */ | |
2547 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2548 | to.sin_addr = p->u.prefix4; | |
2549 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2550 | ||
2551 | /* RIP version is rip's configuration. */ | |
2552 | rip_output_process(connected, &to, route_type, | |
2553 | rip->version_send); | |
b9d92881 | 2554 | } |
718e3744 | 2555 | } |
2556 | ||
2557 | /* RIP's periodical timer. */ | |
d62a17ae | 2558 | static int rip_update(struct thread *t) |
718e3744 | 2559 | { |
045c5389 RW |
2560 | struct rip *rip = THREAD_ARG(t); |
2561 | ||
d62a17ae | 2562 | /* Clear timer pointer. */ |
2563 | rip->t_update = NULL; | |
718e3744 | 2564 | |
d62a17ae | 2565 | if (IS_RIP_DEBUG_EVENT) |
2566 | zlog_debug("update timer fire!"); | |
718e3744 | 2567 | |
d62a17ae | 2568 | /* Process update output. */ |
045c5389 | 2569 | rip_update_process(rip, rip_all_route); |
718e3744 | 2570 | |
d62a17ae | 2571 | /* Triggered updates may be suppressed if a regular update is due by |
2572 | the time the triggered update would be sent. */ | |
2573 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
2574 | rip->trigger = 0; | |
718e3744 | 2575 | |
d62a17ae | 2576 | /* Register myself. */ |
045c5389 | 2577 | rip_event(rip, RIP_UPDATE_EVENT, 0); |
718e3744 | 2578 | |
d62a17ae | 2579 | return 0; |
718e3744 | 2580 | } |
2581 | ||
2582 | /* Walk down the RIP routing table then clear changed flag. */ | |
045c5389 | 2583 | static void rip_clear_changed_flag(struct rip *rip) |
718e3744 | 2584 | { |
d62a17ae | 2585 | struct route_node *rp; |
2586 | struct rip_info *rinfo = NULL; | |
2587 | struct list *list = NULL; | |
2588 | struct listnode *listnode = NULL; | |
718e3744 | 2589 | |
d62a17ae | 2590 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2591 | if ((list = rp->info) != NULL) | |
2592 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
2593 | UNSET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2594 | /* This flag can be set only on the first entry. | |
2595 | */ | |
2596 | break; | |
2597 | } | |
718e3744 | 2598 | } |
2599 | ||
2600 | /* Triggered update interval timer. */ | |
d62a17ae | 2601 | static int rip_triggered_interval(struct thread *t) |
718e3744 | 2602 | { |
045c5389 | 2603 | struct rip *rip = THREAD_ARG(t); |
718e3744 | 2604 | |
d62a17ae | 2605 | rip->t_triggered_interval = NULL; |
718e3744 | 2606 | |
d62a17ae | 2607 | if (rip->trigger) { |
2608 | rip->trigger = 0; | |
2609 | rip_triggered_update(t); | |
2610 | } | |
2611 | return 0; | |
2612 | } | |
718e3744 | 2613 | |
2614 | /* Execute triggered update. */ | |
d62a17ae | 2615 | static int rip_triggered_update(struct thread *t) |
718e3744 | 2616 | { |
045c5389 | 2617 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 2618 | int interval; |
718e3744 | 2619 | |
d62a17ae | 2620 | /* Clear thred pointer. */ |
2621 | rip->t_triggered_update = NULL; | |
718e3744 | 2622 | |
d62a17ae | 2623 | /* Cancel interval timer. */ |
2624 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
2625 | rip->trigger = 0; | |
718e3744 | 2626 | |
d62a17ae | 2627 | /* Logging triggered update. */ |
2628 | if (IS_RIP_DEBUG_EVENT) | |
2629 | zlog_debug("triggered update!"); | |
718e3744 | 2630 | |
d62a17ae | 2631 | /* Split Horizon processing is done when generating triggered |
2632 | updates as well as normal updates (see section 2.6). */ | |
045c5389 | 2633 | rip_update_process(rip, rip_changed_route); |
718e3744 | 2634 | |
d62a17ae | 2635 | /* Once all of the triggered updates have been generated, the route |
2636 | change flags should be cleared. */ | |
045c5389 | 2637 | rip_clear_changed_flag(rip); |
718e3744 | 2638 | |
d62a17ae | 2639 | /* After a triggered update is sent, a timer should be set for a |
2640 | random interval between 1 and 5 seconds. If other changes that | |
2641 | would trigger updates occur before the timer expires, a single | |
2642 | update is triggered when the timer expires. */ | |
2643 | interval = (random() % 5) + 1; | |
718e3744 | 2644 | |
d62a17ae | 2645 | rip->t_triggered_interval = NULL; |
045c5389 | 2646 | thread_add_timer(master, rip_triggered_interval, rip, interval, |
d62a17ae | 2647 | &rip->t_triggered_interval); |
718e3744 | 2648 | |
d62a17ae | 2649 | return 0; |
718e3744 | 2650 | } |
2651 | ||
2652 | /* Withdraw redistributed route. */ | |
045c5389 | 2653 | void rip_redistribute_withdraw(struct rip *rip, int type) |
d62a17ae | 2654 | { |
2655 | struct route_node *rp; | |
2656 | struct rip_info *rinfo = NULL; | |
2657 | struct list *list = NULL; | |
2658 | ||
d62a17ae | 2659 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2660 | if ((list = rp->info) != NULL) { | |
2661 | rinfo = listgetdata(listhead(list)); | |
2662 | if (rinfo->type == type | |
2663 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) { | |
2664 | /* Perform poisoned reverse. */ | |
2665 | rinfo->metric = RIP_METRIC_INFINITY; | |
2666 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
2667 | rip_garbage_collect, | |
2668 | rip->garbage_time); | |
2669 | RIP_TIMER_OFF(rinfo->t_timeout); | |
2670 | rinfo->flags |= RIP_RTF_CHANGED; | |
2671 | ||
2672 | if (IS_RIP_DEBUG_EVENT) { | |
2673 | struct prefix_ipv4 *p = | |
2674 | (struct prefix_ipv4 *)&rp->p; | |
2675 | ||
2676 | zlog_debug( | |
2677 | "Poisone %s/%d on the interface %s with an infinity metric [withdraw]", | |
2678 | inet_ntoa(p->prefix), | |
2679 | p->prefixlen, | |
dd127197 DS |
2680 | ifindex2ifname( |
2681 | rinfo->nh.ifindex, | |
ae7b826a | 2682 | rip->vrf->vrf_id)); |
d62a17ae | 2683 | } |
2684 | ||
045c5389 | 2685 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 2686 | } |
2687 | } | |
2688 | } | |
2689 | ||
045c5389 RW |
2690 | struct rip *rip_lookup_by_vrf_id(vrf_id_t vrf_id) |
2691 | { | |
2692 | struct vrf *vrf; | |
2693 | ||
2694 | vrf = vrf_lookup_by_id(vrf_id); | |
2695 | if (!vrf) | |
2696 | return NULL; | |
2697 | ||
2698 | return vrf->info; | |
2699 | } | |
2700 | ||
ae7b826a RW |
2701 | struct rip *rip_lookup_by_vrf_name(const char *vrf_name) |
2702 | { | |
2703 | struct rip rip; | |
2704 | ||
2705 | rip.vrf_name = (char *)vrf_name; | |
2706 | ||
2707 | return RB_FIND(rip_instance_head, &rip_instances, &rip); | |
2708 | } | |
2709 | ||
d62a17ae | 2710 | /* Create new RIP instance and set it to global variable. */ |
ae7b826a | 2711 | struct rip *rip_create(const char *vrf_name, struct vrf *vrf, int socket) |
718e3744 | 2712 | { |
045c5389 | 2713 | struct rip *rip; |
045c5389 | 2714 | |
d62a17ae | 2715 | rip = XCALLOC(MTYPE_RIP, sizeof(struct rip)); |
ae7b826a | 2716 | rip->vrf_name = XSTRDUP(MTYPE_RIP_VRF_NAME, vrf_name); |
718e3744 | 2717 | |
d62a17ae | 2718 | /* Set initial value. */ |
8c9226c2 RW |
2719 | rip->ecmp = yang_get_default_bool("%s/allow-ecmp", RIP_INSTANCE); |
2720 | rip->default_metric = | |
2721 | yang_get_default_uint8("%s/default-metric", RIP_INSTANCE); | |
2722 | rip->distance = | |
2723 | yang_get_default_uint8("%s/distance/default", RIP_INSTANCE); | |
44f2f852 RW |
2724 | rip->passive_default = |
2725 | yang_get_default_bool("%s/passive-default", RIP_INSTANCE); | |
8c9226c2 RW |
2726 | rip->garbage_time = yang_get_default_uint32("%s/timers/flush-interval", |
2727 | RIP_INSTANCE); | |
2728 | rip->timeout_time = yang_get_default_uint32( | |
2729 | "%s/timers/holddown-interval", RIP_INSTANCE); | |
2730 | rip->update_time = yang_get_default_uint32("%s/timers/update-interval", | |
2731 | RIP_INSTANCE); | |
2732 | rip->version_send = | |
2733 | yang_get_default_enum("%s/version/send", RIP_INSTANCE); | |
2734 | rip->version_recv = | |
2735 | yang_get_default_enum("%s/version/receive", RIP_INSTANCE); | |
718e3744 | 2736 | |
ca046902 | 2737 | /* Initialize RIP data structures. */ |
d62a17ae | 2738 | rip->table = route_table_init(); |
045c5389 | 2739 | route_table_set_info(rip->table, rip); |
d62a17ae | 2740 | rip->neighbor = route_table_init(); |
29e897ad RW |
2741 | rip->peer_list = list_new(); |
2742 | rip->peer_list->cmp = (int (*)(void *, void *))rip_peer_list_cmp; | |
711915d2 | 2743 | rip->peer_list->del = rip_peer_list_del; |
2826309c RW |
2744 | rip->distance_table = route_table_init(); |
2745 | rip->distance_table->cleanup = rip_distance_table_node_cleanup; | |
ca046902 | 2746 | rip->enable_interface = vector_init(1); |
1205fdc4 | 2747 | rip->enable_network = route_table_init(); |
5a29c0d5 | 2748 | rip->passive_nondefault = vector_init(1); |
3f21c8c4 RW |
2749 | rip->offset_list_master = list_new(); |
2750 | rip->offset_list_master->cmp = (int (*)(void *, void *))offset_list_cmp; | |
6c4c3561 | 2751 | rip->offset_list_master->del = (void (*)(void *))offset_list_free; |
718e3744 | 2752 | |
2d2eaa13 | 2753 | /* Distribute list install. */ |
ae7b826a | 2754 | rip->distribute_ctx = distribute_list_ctx_create(vrf); |
2d2eaa13 RW |
2755 | distribute_list_add_hook(rip->distribute_ctx, rip_distribute_update); |
2756 | distribute_list_delete_hook(rip->distribute_ctx, rip_distribute_update); | |
2757 | ||
4b23867c | 2758 | /* if rmap install. */ |
8f88441d | 2759 | rip->if_rmap_ctx = if_rmap_ctx_create(vrf_name); |
4b23867c PG |
2760 | if_rmap_hook_add(rip->if_rmap_ctx, rip_if_rmap_update); |
2761 | if_rmap_hook_delete(rip->if_rmap_ctx, rip_if_rmap_update); | |
2762 | ||
d62a17ae | 2763 | /* Make output stream. */ |
2764 | rip->obuf = stream_new(1500); | |
16705130 | 2765 | |
ae7b826a RW |
2766 | /* Enable the routing instance if possible. */ |
2767 | if (vrf && vrf_is_enabled(vrf)) | |
2768 | rip_instance_enable(rip, vrf, socket); | |
2769 | else { | |
2770 | rip->vrf = NULL; | |
2771 | rip->sock = -1; | |
045c5389 RW |
2772 | } |
2773 | ||
ae7b826a RW |
2774 | RB_INSERT(rip_instance_head, &rip_instances, rip); |
2775 | ||
045c5389 | 2776 | return rip; |
d62a17ae | 2777 | } |
718e3744 | 2778 | |
d62a17ae | 2779 | /* Sned RIP request to the destination. */ |
2780 | int rip_request_send(struct sockaddr_in *to, struct interface *ifp, | |
d7c0a89a | 2781 | uint8_t version, struct connected *connected) |
d62a17ae | 2782 | { |
2783 | struct rte *rte; | |
2784 | struct rip_packet rip_packet; | |
2785 | struct listnode *node, *nnode; | |
2786 | ||
2787 | memset(&rip_packet, 0, sizeof(rip_packet)); | |
2788 | ||
2789 | rip_packet.command = RIP_REQUEST; | |
2790 | rip_packet.version = version; | |
2791 | rte = rip_packet.rte; | |
2792 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
2793 | ||
2794 | if (connected) { | |
2795 | /* | |
2796 | * connected is only sent for ripv1 case, or when | |
2797 | * interface does not support multicast. Caller loops | |
2798 | * over each connected address for this case. | |
2799 | */ | |
d7c0a89a | 2800 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2801 | to, connected) |
2802 | != sizeof(rip_packet)) | |
2803 | return -1; | |
2804 | else | |
2805 | return sizeof(rip_packet); | |
2806 | } | |
718e3744 | 2807 | |
d62a17ae | 2808 | /* send request on each connected network */ |
2809 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, connected)) { | |
2810 | struct prefix_ipv4 *p; | |
718e3744 | 2811 | |
d62a17ae | 2812 | p = (struct prefix_ipv4 *)connected->address; |
718e3744 | 2813 | |
d62a17ae | 2814 | if (p->family != AF_INET) |
2815 | continue; | |
f6eacff4 | 2816 | |
d7c0a89a | 2817 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2818 | to, connected) |
2819 | != sizeof(rip_packet)) | |
2820 | return -1; | |
2821 | } | |
2822 | return sizeof(rip_packet); | |
718e3744 | 2823 | } |
2824 | ||
d62a17ae | 2825 | static int rip_update_jitter(unsigned long time) |
718e3744 | 2826 | { |
239389ba | 2827 | #define JITTER_BOUND 4 |
d62a17ae | 2828 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. |
2829 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2830 | The RIPv2 RFC says jitter should be small compared to | |
2831 | update_time. We consider 1/JITTER_BOUND to be small. | |
2832 | */ | |
2833 | ||
2834 | int jitter_input = time; | |
2835 | int jitter; | |
2836 | ||
2837 | if (jitter_input < JITTER_BOUND) | |
2838 | jitter_input = JITTER_BOUND; | |
2839 | ||
2840 | jitter = (((random() % ((jitter_input * 2) + 1)) - jitter_input)); | |
2841 | ||
2842 | return jitter / JITTER_BOUND; | |
2843 | } | |
2844 | ||
045c5389 | 2845 | void rip_event(struct rip *rip, enum rip_event event, int sock) |
d62a17ae | 2846 | { |
2847 | int jitter = 0; | |
2848 | ||
2849 | switch (event) { | |
2850 | case RIP_READ: | |
2851 | rip->t_read = NULL; | |
045c5389 | 2852 | thread_add_read(master, rip_read, rip, sock, &rip->t_read); |
d62a17ae | 2853 | break; |
2854 | case RIP_UPDATE_EVENT: | |
2855 | RIP_TIMER_OFF(rip->t_update); | |
2856 | jitter = rip_update_jitter(rip->update_time); | |
045c5389 | 2857 | thread_add_timer(master, rip_update, rip, |
d62a17ae | 2858 | sock ? 2 : rip->update_time + jitter, |
2859 | &rip->t_update); | |
2860 | break; | |
2861 | case RIP_TRIGGERED_UPDATE: | |
2862 | if (rip->t_triggered_interval) | |
2863 | rip->trigger = 1; | |
2864 | else | |
045c5389 | 2865 | thread_add_event(master, rip_triggered_update, rip, 0, |
d62a17ae | 2866 | &rip->t_triggered_update); |
2867 | break; | |
2868 | default: | |
2869 | break; | |
2870 | } | |
718e3744 | 2871 | } |
6b0655a2 | 2872 | |
2c239705 | 2873 | #if 0 |
dc63bfd4 | 2874 | static void |
216565ab | 2875 | rip_update_default_metric (void) |
718e3744 | 2876 | { |
2877 | struct route_node *np; | |
bce8e868 LF |
2878 | struct rip_info *rinfo = NULL; |
2879 | struct list *list = NULL; | |
2880 | struct listnode *listnode = NULL; | |
718e3744 | 2881 | |
2882 | for (np = route_top (rip->table); np; np = route_next (np)) | |
bce8e868 LF |
2883 | if ((list = np->info) != NULL) |
2884 | for (ALL_LIST_ELEMENTS_RO (list, listnode, rinfo)) | |
2885 | if (rinfo->type != ZEBRA_ROUTE_RIP && rinfo->type != ZEBRA_ROUTE_CONNECT) | |
2886 | rinfo->metric = rip->default_metric; | |
718e3744 | 2887 | } |
2c239705 | 2888 | #endif |
718e3744 | 2889 | |
23b23d8c | 2890 | struct rip_distance *rip_distance_new(void) |
718e3744 | 2891 | { |
d62a17ae | 2892 | return XCALLOC(MTYPE_RIP_DISTANCE, sizeof(struct rip_distance)); |
718e3744 | 2893 | } |
2894 | ||
23b23d8c | 2895 | void rip_distance_free(struct rip_distance *rdistance) |
d62a17ae | 2896 | { |
2826309c RW |
2897 | if (rdistance->access_list) |
2898 | free(rdistance->access_list); | |
d62a17ae | 2899 | XFREE(MTYPE_RIP_DISTANCE, rdistance); |
718e3744 | 2900 | } |
2901 | ||
2826309c RW |
2902 | static void rip_distance_table_node_cleanup(struct route_table *table, |
2903 | struct route_node *node) | |
d62a17ae | 2904 | { |
d62a17ae | 2905 | struct rip_distance *rdistance; |
718e3744 | 2906 | |
2826309c RW |
2907 | rdistance = node->info; |
2908 | if (rdistance) | |
2909 | rip_distance_free(rdistance); | |
d62a17ae | 2910 | } |
2911 | ||
2912 | /* Apply RIP information to distance method. */ | |
045c5389 | 2913 | uint8_t rip_distance_apply(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 2914 | { |
2915 | struct route_node *rn; | |
2916 | struct prefix_ipv4 p; | |
2917 | struct rip_distance *rdistance; | |
2918 | struct access_list *alist; | |
2919 | ||
d62a17ae | 2920 | memset(&p, 0, sizeof(struct prefix_ipv4)); |
2921 | p.family = AF_INET; | |
2922 | p.prefix = rinfo->from; | |
2923 | p.prefixlen = IPV4_MAX_BITLEN; | |
2924 | ||
2925 | /* Check source address. */ | |
2826309c | 2926 | rn = route_node_match(rip->distance_table, (struct prefix *)&p); |
d62a17ae | 2927 | if (rn) { |
2928 | rdistance = rn->info; | |
2929 | route_unlock_node(rn); | |
2930 | ||
2931 | if (rdistance->access_list) { | |
2932 | alist = access_list_lookup(AFI_IP, | |
2933 | rdistance->access_list); | |
2934 | if (alist == NULL) | |
2935 | return 0; | |
2936 | if (access_list_apply(alist, &rinfo->rp->p) | |
2937 | == FILTER_DENY) | |
2938 | return 0; | |
2939 | ||
2940 | return rdistance->distance; | |
2941 | } else | |
2942 | return rdistance->distance; | |
718e3744 | 2943 | } |
718e3744 | 2944 | |
d62a17ae | 2945 | if (rip->distance) |
2946 | return rip->distance; | |
718e3744 | 2947 | |
d62a17ae | 2948 | return 0; |
718e3744 | 2949 | } |
2950 | ||
045c5389 | 2951 | static void rip_distance_show(struct vty *vty, struct rip *rip) |
d62a17ae | 2952 | { |
2953 | struct route_node *rn; | |
2954 | struct rip_distance *rdistance; | |
2955 | int header = 1; | |
2956 | char buf[BUFSIZ]; | |
2957 | ||
7f8a9cba | 2958 | vty_out(vty, " Distance: (default is %u)\n", |
d62a17ae | 2959 | rip->distance ? rip->distance : ZEBRA_RIP_DISTANCE_DEFAULT); |
2960 | ||
2826309c | 2961 | for (rn = route_top(rip->distance_table); rn; rn = route_next(rn)) |
d62a17ae | 2962 | if ((rdistance = rn->info) != NULL) { |
2963 | if (header) { | |
2964 | vty_out(vty, | |
2965 | " Address Distance List\n"); | |
2966 | header = 0; | |
2967 | } | |
2968 | sprintf(buf, "%s/%d", inet_ntoa(rn->p.u.prefix4), | |
2969 | rn->p.prefixlen); | |
2970 | vty_out(vty, " %-20s %4d %s\n", buf, | |
2971 | rdistance->distance, | |
2972 | rdistance->access_list ? rdistance->access_list | |
2973 | : ""); | |
2974 | } | |
718e3744 | 2975 | } |
2976 | ||
8478ae7e | 2977 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
045c5389 | 2978 | void rip_ecmp_disable(struct rip *rip) |
d62a17ae | 2979 | { |
2980 | struct route_node *rp; | |
2981 | struct rip_info *rinfo, *tmp_rinfo; | |
2982 | struct list *list; | |
2983 | struct listnode *node, *nextnode; | |
2984 | ||
d62a17ae | 2985 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2986 | if ((list = rp->info) != NULL && listcount(list) > 1) { | |
2987 | rinfo = listgetdata(listhead(list)); | |
2988 | if (!rip_route_rte(rinfo)) | |
2989 | continue; | |
2990 | ||
2991 | /* Drop all other entries, except the first one. */ | |
2992 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
2993 | if (tmp_rinfo != rinfo) { | |
2994 | RIP_TIMER_OFF(tmp_rinfo->t_timeout); | |
2995 | RIP_TIMER_OFF( | |
2996 | tmp_rinfo->t_garbage_collect); | |
2997 | list_delete_node(list, node); | |
2998 | rip_info_free(tmp_rinfo); | |
2999 | } | |
3000 | ||
3001 | /* Update zebra. */ | |
045c5389 | 3002 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 3003 | |
3004 | /* Set the route change flag. */ | |
3005 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
3006 | ||
3007 | /* Signal the output process to trigger an update. */ | |
045c5389 | 3008 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 3009 | } |
8478ae7e LF |
3010 | } |
3011 | ||
718e3744 | 3012 | /* Print out routes update time. */ |
d62a17ae | 3013 | static void rip_vty_out_uptime(struct vty *vty, struct rip_info *rinfo) |
718e3744 | 3014 | { |
d62a17ae | 3015 | time_t clock; |
3016 | struct tm *tm; | |
718e3744 | 3017 | #define TIME_BUF 25 |
d62a17ae | 3018 | char timebuf[TIME_BUF]; |
3019 | struct thread *thread; | |
3020 | ||
3021 | if ((thread = rinfo->t_timeout) != NULL) { | |
3022 | clock = thread_timer_remain_second(thread); | |
3023 | tm = gmtime(&clock); | |
3024 | strftime(timebuf, TIME_BUF, "%M:%S", tm); | |
3025 | vty_out(vty, "%5s", timebuf); | |
3026 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
3027 | clock = thread_timer_remain_second(thread); | |
3028 | tm = gmtime(&clock); | |
3029 | strftime(timebuf, TIME_BUF, "%M:%S", tm); | |
3030 | vty_out(vty, "%5s", timebuf); | |
3031 | } | |
3032 | } | |
3033 | ||
3034 | static const char *rip_route_type_print(int sub_type) | |
3035 | { | |
3036 | switch (sub_type) { | |
3037 | case RIP_ROUTE_RTE: | |
3038 | return "n"; | |
3039 | case RIP_ROUTE_STATIC: | |
3040 | return "s"; | |
3041 | case RIP_ROUTE_DEFAULT: | |
3042 | return "d"; | |
3043 | case RIP_ROUTE_REDISTRIBUTE: | |
3044 | return "r"; | |
3045 | case RIP_ROUTE_INTERFACE: | |
3046 | return "i"; | |
3047 | default: | |
3048 | return "?"; | |
3049 | } | |
718e3744 | 3050 | } |
3051 | ||
3052 | DEFUN (show_ip_rip, | |
3053 | show_ip_rip_cmd, | |
ae7b826a | 3054 | "show ip rip [vrf NAME]", |
718e3744 | 3055 | SHOW_STR |
3056 | IP_STR | |
ae7b826a RW |
3057 | "Show RIP routes\n" |
3058 | VRF_CMD_HELP_STR) | |
718e3744 | 3059 | { |
045c5389 | 3060 | struct rip *rip; |
d62a17ae | 3061 | struct route_node *np; |
3062 | struct rip_info *rinfo = NULL; | |
3063 | struct list *list = NULL; | |
3064 | struct listnode *listnode = NULL; | |
ae7b826a RW |
3065 | const char *vrf_name; |
3066 | int idx = 0; | |
d62a17ae | 3067 | |
ae7b826a RW |
3068 | if (argv_find(argv, argc, "vrf", &idx)) |
3069 | vrf_name = argv[idx + 1]->arg; | |
3070 | else | |
3071 | vrf_name = VRF_DEFAULT_NAME; | |
3072 | ||
3073 | rip = rip_lookup_by_vrf_name(vrf_name); | |
3074 | if (!rip) { | |
3075 | vty_out(vty, "%% RIP instance not found\n"); | |
3076 | return CMD_SUCCESS; | |
3077 | } | |
3078 | if (!rip->enabled) { | |
3079 | vty_out(vty, "%% RIP instance is disabled\n"); | |
d62a17ae | 3080 | return CMD_SUCCESS; |
ae7b826a | 3081 | } |
d62a17ae | 3082 | |
3083 | vty_out(vty, | |
3084 | "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP\n" | |
3085 | "Sub-codes:\n" | |
3086 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
3087 | " (i) - interface\n\n" | |
3088 | " Network Next Hop Metric From Tag Time\n"); | |
3089 | ||
3090 | for (np = route_top(rip->table); np; np = route_next(np)) | |
3091 | if ((list = np->info) != NULL) | |
3092 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
3093 | int len; | |
3094 | ||
3095 | len = vty_out( | |
3096 | vty, "%c(%s) %s/%d", | |
3097 | /* np->lock, For debugging. */ | |
3098 | zebra_route_char(rinfo->type), | |
3099 | rip_route_type_print(rinfo->sub_type), | |
3100 | inet_ntoa(np->p.u.prefix4), | |
3101 | np->p.prefixlen); | |
3102 | ||
3103 | len = 24 - len; | |
3104 | ||
3105 | if (len > 0) | |
3106 | vty_out(vty, "%*s", len, " "); | |
3107 | ||
996c9314 | 3108 | switch (rinfo->nh.type) { |
3f5682c8 DS |
3109 | case NEXTHOP_TYPE_IPV4: |
3110 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
d62a17ae | 3111 | vty_out(vty, "%-20s %2d ", |
dd127197 | 3112 | inet_ntoa(rinfo->nh.gate.ipv4), |
d62a17ae | 3113 | rinfo->metric); |
3f5682c8 DS |
3114 | break; |
3115 | case NEXTHOP_TYPE_IFINDEX: | |
d62a17ae | 3116 | vty_out(vty, |
3117 | "0.0.0.0 %2d ", | |
3118 | rinfo->metric); | |
3f5682c8 DS |
3119 | break; |
3120 | case NEXTHOP_TYPE_BLACKHOLE: | |
3121 | vty_out(vty, | |
3122 | "blackhole %2d ", | |
3123 | rinfo->metric); | |
3124 | break; | |
3125 | case NEXTHOP_TYPE_IPV6: | |
3126 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
3127 | vty_out(vty, | |
3128 | "V6 Address Hidden %2d ", | |
3129 | rinfo->metric); | |
3130 | break; | |
3131 | } | |
d62a17ae | 3132 | |
3133 | /* Route which exist in kernel routing table. */ | |
3134 | if ((rinfo->type == ZEBRA_ROUTE_RIP) | |
3135 | && (rinfo->sub_type == RIP_ROUTE_RTE)) { | |
3136 | vty_out(vty, "%-15s ", | |
3137 | inet_ntoa(rinfo->from)); | |
3138 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3139 | (route_tag_t)rinfo->tag); | |
3140 | rip_vty_out_uptime(vty, rinfo); | |
3141 | } else if (rinfo->metric | |
3142 | == RIP_METRIC_INFINITY) { | |
3143 | vty_out(vty, "self "); | |
3144 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3145 | (route_tag_t)rinfo->tag); | |
3146 | rip_vty_out_uptime(vty, rinfo); | |
3147 | } else { | |
3148 | if (rinfo->external_metric) { | |
3149 | len = vty_out( | |
3150 | vty, "self (%s:%d)", | |
3151 | zebra_route_string( | |
3152 | rinfo->type), | |
3153 | rinfo->external_metric); | |
3154 | len = 16 - len; | |
3155 | if (len > 0) | |
3156 | vty_out(vty, "%*s", len, | |
3157 | " "); | |
3158 | } else | |
3159 | vty_out(vty, | |
3160 | "self "); | |
3161 | vty_out(vty, "%3" ROUTE_TAG_PRI, | |
3162 | (route_tag_t)rinfo->tag); | |
3163 | } | |
3164 | ||
3165 | vty_out(vty, "\n"); | |
3166 | } | |
3167 | return CMD_SUCCESS; | |
718e3744 | 3168 | } |
3169 | ||
16705130 | 3170 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3171 | DEFUN (show_ip_rip_status, | |
3172 | show_ip_rip_status_cmd, | |
ae7b826a | 3173 | "show ip rip [vrf NAME] status", |
718e3744 | 3174 | SHOW_STR |
3175 | IP_STR | |
16705130 | 3176 | "Show RIP routes\n" |
ae7b826a | 3177 | VRF_CMD_HELP_STR |
718e3744 | 3178 | "IP routing protocol process parameters and statistics\n") |
3179 | { | |
045c5389 | 3180 | struct rip *rip; |
d62a17ae | 3181 | struct interface *ifp; |
3182 | struct rip_interface *ri; | |
3183 | extern const struct message ri_version_msg[]; | |
3184 | const char *send_version; | |
3185 | const char *receive_version; | |
ae7b826a RW |
3186 | const char *vrf_name; |
3187 | int idx = 0; | |
d62a17ae | 3188 | |
ae7b826a RW |
3189 | if (argv_find(argv, argc, "vrf", &idx)) |
3190 | vrf_name = argv[idx + 1]->arg; | |
3191 | else | |
3192 | vrf_name = VRF_DEFAULT_NAME; | |
3193 | ||
3194 | rip = rip_lookup_by_vrf_name(vrf_name); | |
3195 | if (!rip) { | |
3196 | vty_out(vty, "%% RIP instance not found\n"); | |
d62a17ae | 3197 | return CMD_SUCCESS; |
ae7b826a RW |
3198 | } |
3199 | if (!rip->enabled) { | |
3200 | vty_out(vty, "%% RIP instance is disabled\n"); | |
3201 | return CMD_SUCCESS; | |
3202 | } | |
d62a17ae | 3203 | |
3204 | vty_out(vty, "Routing Protocol is \"rip\"\n"); | |
b745780b | 3205 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 3206 | rip->update_time); |
3207 | vty_out(vty, " next due in %lu seconds\n", | |
3208 | thread_timer_remain_second(rip->t_update)); | |
b745780b RW |
3209 | vty_out(vty, " Timeout after %u seconds,", rip->timeout_time); |
3210 | vty_out(vty, " garbage collect after %u seconds\n", rip->garbage_time); | |
d62a17ae | 3211 | |
3212 | /* Filtering status show. */ | |
03a38493 | 3213 | config_show_distribute(vty, rip->distribute_ctx); |
d62a17ae | 3214 | |
3215 | /* Default metric information. */ | |
282ae30c | 3216 | vty_out(vty, " Default redistribution metric is %u\n", |
d62a17ae | 3217 | rip->default_metric); |
3218 | ||
3219 | /* Redistribute information. */ | |
3220 | vty_out(vty, " Redistributing:"); | |
045c5389 | 3221 | rip_show_redistribute_config(vty, rip); |
d62a17ae | 3222 | vty_out(vty, "\n"); |
3223 | ||
3224 | vty_out(vty, " Default version control: send version %s,", | |
3225 | lookup_msg(ri_version_msg, rip->version_send, NULL)); | |
3226 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3227 | vty_out(vty, " receive any version \n"); | |
3228 | else | |
3229 | vty_out(vty, " receive version %s \n", | |
3230 | lookup_msg(ri_version_msg, rip->version_recv, NULL)); | |
3231 | ||
3232 | vty_out(vty, " Interface Send Recv Key-chain\n"); | |
3233 | ||
ae7b826a | 3234 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 3235 | ri = ifp->info; |
3236 | ||
3237 | if (!ri->running) | |
3238 | continue; | |
3239 | ||
3240 | if (ri->enable_network || ri->enable_interface) { | |
3241 | if (ri->ri_send == RI_RIP_UNSPEC) | |
3242 | send_version = | |
3243 | lookup_msg(ri_version_msg, | |
3244 | rip->version_send, NULL); | |
3245 | else | |
3246 | send_version = lookup_msg(ri_version_msg, | |
3247 | ri->ri_send, NULL); | |
3248 | ||
3249 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
3250 | receive_version = | |
3251 | lookup_msg(ri_version_msg, | |
3252 | rip->version_recv, NULL); | |
3253 | else | |
3254 | receive_version = lookup_msg( | |
3255 | ri_version_msg, ri->ri_receive, NULL); | |
3256 | ||
3257 | vty_out(vty, " %-17s%-3s %-3s %s\n", ifp->name, | |
3258 | send_version, receive_version, | |
3259 | ri->key_chain ? ri->key_chain : ""); | |
3260 | } | |
3261 | } | |
718e3744 | 3262 | |
d62a17ae | 3263 | vty_out(vty, " Routing for Networks:\n"); |
045c5389 | 3264 | rip_show_network_config(vty, rip); |
718e3744 | 3265 | |
718e3744 | 3266 | { |
d62a17ae | 3267 | int found_passive = 0; |
ae7b826a | 3268 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 3269 | ri = ifp->info; |
3270 | ||
3271 | if ((ri->enable_network || ri->enable_interface) | |
3272 | && ri->passive) { | |
3273 | if (!found_passive) { | |
3274 | vty_out(vty, | |
3275 | " Passive Interface(s):\n"); | |
3276 | found_passive = 1; | |
3277 | } | |
3278 | vty_out(vty, " %s\n", ifp->name); | |
3279 | } | |
3280 | } | |
718e3744 | 3281 | } |
3282 | ||
d62a17ae | 3283 | vty_out(vty, " Routing Information Sources:\n"); |
3284 | vty_out(vty, | |
3285 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
045c5389 | 3286 | rip_peer_display(vty, rip); |
718e3744 | 3287 | |
045c5389 | 3288 | rip_distance_show(vty, rip); |
718e3744 | 3289 | |
d62a17ae | 3290 | return CMD_SUCCESS; |
3291 | } | |
718e3744 | 3292 | |
d62a17ae | 3293 | /* RIP configuration write function. */ |
3294 | static int config_write_rip(struct vty *vty) | |
3295 | { | |
ae7b826a | 3296 | struct rip *rip; |
d62a17ae | 3297 | int write = 0; |
d62a17ae | 3298 | |
ae7b826a RW |
3299 | RB_FOREACH(rip, rip_instance_head, &rip_instances) { |
3300 | char xpath[XPATH_MAXLEN]; | |
3301 | struct lyd_node *dnode; | |
045c5389 | 3302 | |
ae7b826a RW |
3303 | snprintf(xpath, sizeof(xpath), |
3304 | "/frr-ripd:ripd/instance[vrf='%s']", rip->vrf_name); | |
3305 | ||
3306 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
3307 | assert(dnode); | |
d62a17ae | 3308 | |
8c9226c2 RW |
3309 | nb_cli_show_dnode_cmds(vty, dnode, false); |
3310 | ||
ae7b826a RW |
3311 | /* Distribute configuration. */ |
3312 | config_write_distribute(vty, rip->distribute_ctx); | |
d62a17ae | 3313 | |
ae7b826a | 3314 | /* Interface routemap configuration */ |
8f88441d | 3315 | config_write_if_rmap(vty, rip->if_rmap_ctx); |
ae7b826a RW |
3316 | |
3317 | write = 1; | |
d62a17ae | 3318 | } |
ae7b826a | 3319 | |
d62a17ae | 3320 | return write; |
3321 | } | |
718e3744 | 3322 | |
d62a17ae | 3323 | /* RIP node structure. */ |
3324 | static struct cmd_node rip_node = {RIP_NODE, "%s(config-router)# ", 1}; | |
718e3744 | 3325 | |
d62a17ae | 3326 | /* Distribute-list update functions. */ |
03a38493 PG |
3327 | static void rip_distribute_update(struct distribute_ctx *ctx, |
3328 | struct distribute *dist) | |
d62a17ae | 3329 | { |
3330 | struct interface *ifp; | |
3331 | struct rip_interface *ri; | |
3332 | struct access_list *alist; | |
3333 | struct prefix_list *plist; | |
8478ae7e | 3334 | |
ae7b826a | 3335 | if (!ctx->vrf || !dist->ifname) |
d62a17ae | 3336 | return; |
718e3744 | 3337 | |
a36898e7 | 3338 | ifp = if_lookup_by_name(dist->ifname, ctx->vrf->vrf_id); |
d62a17ae | 3339 | if (ifp == NULL) |
3340 | return; | |
718e3744 | 3341 | |
d62a17ae | 3342 | ri = ifp->info; |
6b0655a2 | 3343 | |
d62a17ae | 3344 | if (dist->list[DISTRIBUTE_V4_IN]) { |
3345 | alist = access_list_lookup(AFI_IP, | |
3346 | dist->list[DISTRIBUTE_V4_IN]); | |
3347 | if (alist) | |
3348 | ri->list[RIP_FILTER_IN] = alist; | |
3349 | else | |
3350 | ri->list[RIP_FILTER_IN] = NULL; | |
3351 | } else | |
3352 | ri->list[RIP_FILTER_IN] = NULL; | |
3353 | ||
3354 | if (dist->list[DISTRIBUTE_V4_OUT]) { | |
3355 | alist = access_list_lookup(AFI_IP, | |
3356 | dist->list[DISTRIBUTE_V4_OUT]); | |
3357 | if (alist) | |
3358 | ri->list[RIP_FILTER_OUT] = alist; | |
3359 | else | |
3360 | ri->list[RIP_FILTER_OUT] = NULL; | |
3361 | } else | |
3362 | ri->list[RIP_FILTER_OUT] = NULL; | |
3363 | ||
3364 | if (dist->prefix[DISTRIBUTE_V4_IN]) { | |
3365 | plist = prefix_list_lookup(AFI_IP, | |
3366 | dist->prefix[DISTRIBUTE_V4_IN]); | |
3367 | if (plist) | |
3368 | ri->prefix[RIP_FILTER_IN] = plist; | |
3369 | else | |
3370 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3371 | } else | |
3372 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3373 | ||
3374 | if (dist->prefix[DISTRIBUTE_V4_OUT]) { | |
3375 | plist = prefix_list_lookup(AFI_IP, | |
3376 | dist->prefix[DISTRIBUTE_V4_OUT]); | |
3377 | if (plist) | |
3378 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3379 | else | |
3380 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3381 | } else | |
3382 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3383 | } | |
3384 | ||
3385 | void rip_distribute_update_interface(struct interface *ifp) | |
3386 | { | |
045c5389 RW |
3387 | struct rip_interface *ri = ifp->info; |
3388 | struct rip *rip = ri->rip; | |
d62a17ae | 3389 | struct distribute *dist; |
3390 | ||
03a38493 PG |
3391 | if (!rip) |
3392 | return; | |
3393 | dist = distribute_lookup(rip->distribute_ctx, ifp->name); | |
d62a17ae | 3394 | if (dist) |
03a38493 | 3395 | rip_distribute_update(rip->distribute_ctx, dist); |
718e3744 | 3396 | } |
3397 | ||
3398 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3399 | /* ARGSUSED */ |
d62a17ae | 3400 | static void rip_distribute_update_all(struct prefix_list *notused) |
718e3744 | 3401 | { |
f4e14fdb | 3402 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 3403 | struct interface *ifp; |
718e3744 | 3404 | |
451fda4f | 3405 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3406 | rip_distribute_update_interface(ifp); |
718e3744 | 3407 | } |
11dde9c2 | 3408 | /* ARGSUSED */ |
d62a17ae | 3409 | static void rip_distribute_update_all_wrapper(struct access_list *notused) |
11dde9c2 | 3410 | { |
d62a17ae | 3411 | rip_distribute_update_all(NULL); |
11dde9c2 | 3412 | } |
6b0655a2 | 3413 | |
718e3744 | 3414 | /* Delete all added rip route. */ |
045c5389 | 3415 | void rip_clean(struct rip *rip) |
718e3744 | 3416 | { |
ae7b826a RW |
3417 | if (rip->enabled) |
3418 | rip_instance_disable(rip); | |
d62a17ae | 3419 | |
2d2eaa13 | 3420 | stream_free(rip->obuf); |
d62a17ae | 3421 | |
2d2eaa13 | 3422 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) |
f9120f71 RW |
3423 | if (rip->redist[i].route_map.name) |
3424 | free(rip->redist[i].route_map.name); | |
2d2eaa13 RW |
3425 | |
3426 | route_table_finish(rip->table); | |
3427 | route_table_finish(rip->neighbor); | |
711915d2 | 3428 | list_delete(&rip->peer_list); |
2d2eaa13 | 3429 | distribute_list_delete(&rip->distribute_ctx); |
8f88441d | 3430 | if_rmap_ctx_delete(rip->if_rmap_ctx); |
d62a17ae | 3431 | |
045c5389 RW |
3432 | rip_clean_network(rip); |
3433 | rip_passive_nondefault_clean(rip); | |
ca046902 | 3434 | vector_free(rip->enable_interface); |
1205fdc4 | 3435 | route_table_finish(rip->enable_network); |
5a29c0d5 | 3436 | vector_free(rip->passive_nondefault); |
3f21c8c4 | 3437 | list_delete(&rip->offset_list_master); |
045c5389 | 3438 | rip_interfaces_clean(rip); |
2826309c | 3439 | route_table_finish(rip->distance_table); |
045c5389 | 3440 | |
ae7b826a RW |
3441 | RB_REMOVE(rip_instance_head, &rip_instances, rip); |
3442 | XFREE(MTYPE_RIP_VRF_NAME, rip->vrf_name); | |
2d2eaa13 | 3443 | XFREE(MTYPE_RIP, rip); |
718e3744 | 3444 | } |
3445 | ||
4b23867c PG |
3446 | static void rip_if_rmap_update(struct if_rmap_ctx *ctx, |
3447 | struct if_rmap *if_rmap) | |
16705130 | 3448 | { |
aec0d756 | 3449 | struct interface *ifp = NULL; |
d62a17ae | 3450 | struct rip_interface *ri; |
3451 | struct route_map *rmap; | |
aec0d756 | 3452 | struct vrf *vrf = NULL; |
16705130 | 3453 | |
aec0d756 PG |
3454 | if (ctx->name) |
3455 | vrf = vrf_lookup_by_name(ctx->name); | |
3456 | if (vrf) | |
a36898e7 | 3457 | ifp = if_lookup_by_name(if_rmap->ifname, vrf->vrf_id); |
d62a17ae | 3458 | if (ifp == NULL) |
3459 | return; | |
16705130 | 3460 | |
d62a17ae | 3461 | ri = ifp->info; |
d62a17ae | 3462 | if (if_rmap->routemap[IF_RMAP_IN]) { |
3463 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
3464 | if (rmap) | |
3465 | ri->routemap[IF_RMAP_IN] = rmap; | |
3466 | else | |
3467 | ri->routemap[IF_RMAP_IN] = NULL; | |
3468 | } else | |
3469 | ri->routemap[RIP_FILTER_IN] = NULL; | |
16705130 | 3470 | |
d62a17ae | 3471 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
3472 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
3473 | if (rmap) | |
3474 | ri->routemap[IF_RMAP_OUT] = rmap; | |
3475 | else | |
3476 | ri->routemap[IF_RMAP_OUT] = NULL; | |
3477 | } else | |
3478 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
16705130 | 3479 | } |
3480 | ||
d62a17ae | 3481 | void rip_if_rmap_update_interface(struct interface *ifp) |
16705130 | 3482 | { |
8f88441d RW |
3483 | struct rip_interface *ri = ifp->info; |
3484 | struct rip *rip = ri->rip; | |
d62a17ae | 3485 | struct if_rmap *if_rmap; |
4b23867c | 3486 | struct if_rmap_ctx *ctx; |
16705130 | 3487 | |
4b23867c PG |
3488 | if (!rip) |
3489 | return; | |
4b23867c PG |
3490 | ctx = rip->if_rmap_ctx; |
3491 | if (!ctx) | |
3492 | return; | |
3493 | if_rmap = if_rmap_lookup(ctx, ifp->name); | |
d62a17ae | 3494 | if (if_rmap) |
4b23867c | 3495 | rip_if_rmap_update(ctx, if_rmap); |
16705130 | 3496 | } |
3497 | ||
045c5389 | 3498 | static void rip_routemap_update_redistribute(struct rip *rip) |
16705130 | 3499 | { |
045c5389 | 3500 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
8f88441d | 3501 | if (rip->redist[i].route_map.name) { |
f9120f71 RW |
3502 | rip->redist[i].route_map.map = route_map_lookup_by_name( |
3503 | rip->redist[i].route_map.name); | |
8f88441d RW |
3504 | route_map_counter_increment( |
3505 | rip->redist[i].route_map.map); | |
d62a17ae | 3506 | } |
16705130 | 3507 | } |
16705130 | 3508 | } |
3509 | ||
11dde9c2 | 3510 | /* ARGSUSED */ |
d62a17ae | 3511 | static void rip_routemap_update(const char *notused) |
16705130 | 3512 | { |
f4e14fdb | 3513 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
045c5389 | 3514 | struct rip *rip; |
d62a17ae | 3515 | struct interface *ifp; |
16705130 | 3516 | |
451fda4f | 3517 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3518 | rip_if_rmap_update_interface(ifp); |
16705130 | 3519 | |
045c5389 RW |
3520 | rip = vrf->info; |
3521 | if (rip) | |
3522 | rip_routemap_update_redistribute(rip); | |
16705130 | 3523 | } |
3524 | ||
ae7b826a RW |
3525 | /* Link RIP instance to VRF. */ |
3526 | static void rip_vrf_link(struct rip *rip, struct vrf *vrf) | |
3527 | { | |
3528 | struct interface *ifp; | |
3529 | ||
3530 | rip->vrf = vrf; | |
3531 | rip->distribute_ctx->vrf = vrf; | |
3532 | vrf->info = rip; | |
3533 | ||
3534 | FOR_ALL_INTERFACES (vrf, ifp) | |
3535 | rip_interface_sync(ifp); | |
3536 | } | |
3537 | ||
3538 | /* Unlink RIP instance from VRF. */ | |
3539 | static void rip_vrf_unlink(struct rip *rip, struct vrf *vrf) | |
3540 | { | |
3541 | struct interface *ifp; | |
3542 | ||
3543 | rip->vrf = NULL; | |
3544 | rip->distribute_ctx->vrf = NULL; | |
3545 | vrf->info = NULL; | |
3546 | ||
3547 | FOR_ALL_INTERFACES (vrf, ifp) | |
3548 | rip_interface_sync(ifp); | |
3549 | } | |
3550 | ||
3551 | static void rip_instance_enable(struct rip *rip, struct vrf *vrf, int sock) | |
3552 | { | |
3553 | rip->sock = sock; | |
3554 | ||
3555 | rip_vrf_link(rip, vrf); | |
3556 | rip->enabled = true; | |
3557 | ||
f9120f71 RW |
3558 | /* Resend all redistribute requests. */ |
3559 | rip_redistribute_enable(rip); | |
3560 | ||
ae7b826a RW |
3561 | /* Create read and timer thread. */ |
3562 | rip_event(rip, RIP_READ, rip->sock); | |
3563 | rip_event(rip, RIP_UPDATE_EVENT, 1); | |
3564 | ||
3565 | rip_zebra_vrf_register(vrf); | |
3566 | } | |
3567 | ||
3568 | static void rip_instance_disable(struct rip *rip) | |
3569 | { | |
3570 | struct vrf *vrf = rip->vrf; | |
3571 | struct route_node *rp; | |
3572 | ||
3573 | /* Clear RIP routes */ | |
3574 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { | |
3575 | struct rip_info *rinfo; | |
3576 | struct list *list; | |
3577 | struct listnode *listnode; | |
3578 | ||
3579 | if ((list = rp->info) == NULL) | |
3580 | continue; | |
3581 | ||
3582 | rinfo = listgetdata(listhead(list)); | |
3583 | if (rip_route_rte(rinfo)) | |
3584 | rip_zebra_ipv4_delete(rip, rp); | |
3585 | ||
3586 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
3587 | RIP_TIMER_OFF(rinfo->t_timeout); | |
3588 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
3589 | rip_info_free(rinfo); | |
3590 | } | |
3591 | list_delete(&list); | |
3592 | rp->info = NULL; | |
3593 | route_unlock_node(rp); | |
3594 | } | |
3595 | ||
f9120f71 RW |
3596 | /* Flush all redistribute requests. */ |
3597 | rip_redistribute_disable(rip); | |
3598 | ||
ae7b826a RW |
3599 | /* Cancel RIP related timers. */ |
3600 | RIP_TIMER_OFF(rip->t_update); | |
3601 | RIP_TIMER_OFF(rip->t_triggered_update); | |
3602 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
3603 | ||
3604 | /* Cancel read thread. */ | |
3605 | THREAD_READ_OFF(rip->t_read); | |
3606 | ||
3607 | /* Close RIP socket. */ | |
3608 | close(rip->sock); | |
3609 | rip->sock = -1; | |
3610 | ||
3611 | /* Clear existing peers. */ | |
3612 | list_delete_all_node(rip->peer_list); | |
3613 | ||
3614 | rip_zebra_vrf_deregister(vrf); | |
3615 | ||
3616 | rip_vrf_unlink(rip, vrf); | |
3617 | rip->enabled = false; | |
3618 | } | |
3619 | ||
3620 | static int rip_vrf_new(struct vrf *vrf) | |
3621 | { | |
3622 | if (IS_RIP_DEBUG_EVENT) | |
3623 | zlog_debug("%s: VRF created: %s(%u)", __func__, vrf->name, | |
3624 | vrf->vrf_id); | |
3625 | ||
3626 | return 0; | |
3627 | } | |
3628 | ||
3629 | static int rip_vrf_delete(struct vrf *vrf) | |
3630 | { | |
3631 | if (IS_RIP_DEBUG_EVENT) | |
3632 | zlog_debug("%s: VRF deleted: %s(%u)", __func__, vrf->name, | |
3633 | vrf->vrf_id); | |
3634 | ||
3635 | return 0; | |
3636 | } | |
3637 | ||
3638 | static int rip_vrf_enable(struct vrf *vrf) | |
3639 | { | |
3640 | struct rip *rip; | |
3641 | int socket; | |
3642 | ||
3643 | rip = rip_lookup_by_vrf_name(vrf->name); | |
3644 | if (!rip || rip->enabled) | |
3645 | return 0; | |
3646 | ||
3647 | if (IS_RIP_DEBUG_EVENT) | |
3648 | zlog_debug("%s: VRF %s(%u) enabled", __func__, vrf->name, | |
3649 | vrf->vrf_id); | |
3650 | ||
3651 | /* Activate the VRF RIP instance. */ | |
3652 | if (!rip->enabled) { | |
3653 | socket = rip_create_socket(vrf); | |
3654 | if (socket < 0) | |
3655 | return -1; | |
3656 | ||
3657 | rip_instance_enable(rip, vrf, socket); | |
3658 | } | |
3659 | ||
3660 | return 0; | |
3661 | } | |
3662 | ||
3663 | static int rip_vrf_disable(struct vrf *vrf) | |
3664 | { | |
3665 | struct rip *rip; | |
3666 | ||
3667 | rip = rip_lookup_by_vrf_name(vrf->name); | |
3668 | if (!rip || !rip->enabled) | |
3669 | return 0; | |
3670 | ||
3671 | if (IS_RIP_DEBUG_EVENT) | |
3672 | zlog_debug("%s: VRF %s(%u) disabled", __func__, vrf->name, | |
3673 | vrf->vrf_id); | |
3674 | ||
3675 | /* Deactivate the VRF RIP instance. */ | |
3676 | if (rip->enabled) | |
3677 | rip_instance_disable(rip); | |
3678 | ||
3679 | return 0; | |
3680 | } | |
3681 | ||
3682 | void rip_vrf_init(void) | |
3683 | { | |
3684 | vrf_init(rip_vrf_new, rip_vrf_enable, rip_vrf_disable, rip_vrf_delete, | |
3685 | NULL); | |
3686 | } | |
3687 | ||
3688 | void rip_vrf_terminate(void) | |
3689 | { | |
3690 | vrf_terminate(); | |
3691 | } | |
3692 | ||
718e3744 | 3693 | /* Allocate new rip structure and set default value. */ |
d62a17ae | 3694 | void rip_init(void) |
3695 | { | |
3696 | /* Install top nodes. */ | |
3697 | install_node(&rip_node, config_write_rip); | |
3698 | ||
3699 | /* Install rip commands. */ | |
3700 | install_element(VIEW_NODE, &show_ip_rip_cmd); | |
3701 | install_element(VIEW_NODE, &show_ip_rip_status_cmd); | |
d62a17ae | 3702 | |
3703 | install_default(RIP_NODE); | |
d62a17ae | 3704 | |
3705 | /* Debug related init. */ | |
3706 | rip_debug_init(); | |
3707 | ||
3708 | /* Access list install. */ | |
3709 | access_list_init(); | |
3710 | access_list_add_hook(rip_distribute_update_all_wrapper); | |
3711 | access_list_delete_hook(rip_distribute_update_all_wrapper); | |
3712 | ||
3713 | /* Prefix list initialize.*/ | |
3714 | prefix_list_init(); | |
3715 | prefix_list_add_hook(rip_distribute_update_all); | |
3716 | prefix_list_delete_hook(rip_distribute_update_all); | |
3717 | ||
3718 | /* Distribute list install. */ | |
3719 | distribute_list_init(RIP_NODE); | |
d62a17ae | 3720 | |
3721 | /* Route-map */ | |
3722 | rip_route_map_init(); | |
d62a17ae | 3723 | |
3724 | route_map_add_hook(rip_routemap_update); | |
3725 | route_map_delete_hook(rip_routemap_update); | |
3726 | ||
3727 | if_rmap_init(RIP_NODE); | |
718e3744 | 3728 | } |