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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" |
5920b3eb | 47 | #include "network.h" |
53bb7f9b | 48 | #include "lib/printfrr.h" |
718e3744 | 49 | |
50 | #include "ripd/ripd.h" | |
f80ec39e | 51 | #include "ripd/rip_nb.h" |
718e3744 | 52 | #include "ripd/rip_debug.h" |
518e377f | 53 | #include "ripd/rip_errors.h" |
ae7b826a | 54 | #include "ripd/rip_interface.h" |
718e3744 | 55 | |
0b3acf4f | 56 | /* UDP receive buffer size */ |
57 | #define RIP_UDP_RCV_BUF 41600 | |
58 | ||
bf8d3d6a DL |
59 | DEFINE_MGROUP(RIPD, "ripd"); |
60 | DEFINE_MTYPE_STATIC(RIPD, RIP, "RIP structure"); | |
61 | DEFINE_MTYPE_STATIC(RIPD, RIP_VRF_NAME, "RIP VRF name"); | |
62 | DEFINE_MTYPE_STATIC(RIPD, RIP_INFO, "RIP route info"); | |
63 | DEFINE_MTYPE_STATIC(RIPD, RIP_DISTANCE, "RIP distance"); | |
814a2585 | 64 | |
718e3744 | 65 | /* Prototypes. */ |
d62a17ae | 66 | static void rip_output_process(struct connected *, struct sockaddr_in *, int, |
d7c0a89a | 67 | uint8_t); |
d62a17ae | 68 | static int rip_triggered_update(struct thread *); |
69 | static int rip_update_jitter(unsigned long); | |
2826309c RW |
70 | static void rip_distance_table_node_cleanup(struct route_table *table, |
71 | struct route_node *node); | |
ae7b826a RW |
72 | static void rip_instance_enable(struct rip *rip, struct vrf *vrf, int sock); |
73 | static void rip_instance_disable(struct rip *rip); | |
6b0655a2 | 74 | |
03a38493 PG |
75 | static void rip_distribute_update(struct distribute_ctx *ctx, |
76 | struct distribute *dist); | |
77 | ||
4b23867c PG |
78 | static void rip_if_rmap_update(struct if_rmap_ctx *ctx, |
79 | struct if_rmap *if_rmap); | |
80 | ||
718e3744 | 81 | /* RIP output routes type. */ |
d62a17ae | 82 | enum { rip_all_route, rip_changed_route }; |
6b0655a2 | 83 | |
718e3744 | 84 | /* RIP command strings. */ |
d62a17ae | 85 | static const struct message rip_msg[] = {{RIP_REQUEST, "REQUEST"}, |
86 | {RIP_RESPONSE, "RESPONSE"}, | |
87 | {RIP_TRACEON, "TRACEON"}, | |
88 | {RIP_TRACEOFF, "TRACEOFF"}, | |
89 | {RIP_POLL, "POLL"}, | |
90 | {RIP_POLL_ENTRY, "POLL ENTRY"}, | |
91 | {0}}; | |
6b0655a2 | 92 | |
ae7b826a RW |
93 | /* Generate rb-tree of RIP instances. */ |
94 | static inline int rip_instance_compare(const struct rip *a, const struct rip *b) | |
95 | { | |
96 | return strcmp(a->vrf_name, b->vrf_name); | |
97 | } | |
98 | RB_GENERATE(rip_instance_head, rip, entry, rip_instance_compare) | |
99 | ||
100 | struct rip_instance_head rip_instances = RB_INITIALIZER(&rip_instances); | |
101 | ||
ab9939f2 | 102 | /* Utility function to set broadcast option to the socket. */ |
d62a17ae | 103 | static int sockopt_broadcast(int sock) |
718e3744 | 104 | { |
d62a17ae | 105 | int ret; |
106 | int on = 1; | |
718e3744 | 107 | |
d62a17ae | 108 | ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&on, |
0d6f7fd6 | 109 | sizeof(on)); |
d62a17ae | 110 | if (ret < 0) { |
111 | zlog_warn("can't set sockopt SO_BROADCAST to socket %d", sock); | |
112 | return -1; | |
113 | } | |
114 | return 0; | |
718e3744 | 115 | } |
116 | ||
1137aef4 | 117 | int rip_route_rte(struct rip_info *rinfo) |
718e3744 | 118 | { |
d62a17ae | 119 | return (rinfo->type == ZEBRA_ROUTE_RIP |
120 | && rinfo->sub_type == RIP_ROUTE_RTE); | |
718e3744 | 121 | } |
122 | ||
d62a17ae | 123 | static struct rip_info *rip_info_new(void) |
718e3744 | 124 | { |
d62a17ae | 125 | return XCALLOC(MTYPE_RIP_INFO, sizeof(struct rip_info)); |
718e3744 | 126 | } |
127 | ||
d62a17ae | 128 | void rip_info_free(struct rip_info *rinfo) |
718e3744 | 129 | { |
d62a17ae | 130 | XFREE(MTYPE_RIP_INFO, rinfo); |
718e3744 | 131 | } |
132 | ||
045c5389 RW |
133 | struct rip *rip_info_get_instance(const struct rip_info *rinfo) |
134 | { | |
135 | return route_table_get_info(rinfo->rp->table); | |
136 | } | |
137 | ||
718e3744 | 138 | /* RIP route garbage collect timer. */ |
d62a17ae | 139 | static int rip_garbage_collect(struct thread *t) |
718e3744 | 140 | { |
d62a17ae | 141 | struct rip_info *rinfo; |
142 | struct route_node *rp; | |
143 | ||
144 | rinfo = THREAD_ARG(t); | |
718e3744 | 145 | |
d62a17ae | 146 | /* Off timeout timer. */ |
147 | RIP_TIMER_OFF(rinfo->t_timeout); | |
718e3744 | 148 | |
d62a17ae | 149 | /* Get route_node pointer. */ |
150 | rp = rinfo->rp; | |
718e3744 | 151 | |
d62a17ae | 152 | /* Unlock route_node. */ |
153 | listnode_delete(rp->info, rinfo); | |
154 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 155 | list_delete((struct list **)&rp->info); |
d62a17ae | 156 | route_unlock_node(rp); |
157 | } | |
718e3744 | 158 | |
d62a17ae | 159 | /* Free RIP routing information. */ |
160 | rip_info_free(rinfo); | |
718e3744 | 161 | |
d62a17ae | 162 | return 0; |
718e3744 | 163 | } |
164 | ||
045c5389 | 165 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo); |
bce8e868 LF |
166 | |
167 | /* Add new route to the ECMP list. | |
8478ae7e LF |
168 | * RETURN: the new entry added in the list, or NULL if it is not the first |
169 | * entry and ECMP is not allowed. | |
bce8e868 | 170 | */ |
045c5389 | 171 | struct rip_info *rip_ecmp_add(struct rip *rip, struct rip_info *rinfo_new) |
718e3744 | 172 | { |
d62a17ae | 173 | struct route_node *rp = rinfo_new->rp; |
174 | struct rip_info *rinfo = NULL; | |
175 | struct list *list = NULL; | |
718e3744 | 176 | |
d62a17ae | 177 | if (rp->info == NULL) |
178 | rp->info = list_new(); | |
179 | list = (struct list *)rp->info; | |
bce8e868 | 180 | |
d62a17ae | 181 | /* If ECMP is not allowed and some entry already exists in the list, |
182 | * do nothing. */ | |
183 | if (listcount(list) && !rip->ecmp) | |
184 | return NULL; | |
8478ae7e | 185 | |
d62a17ae | 186 | rinfo = rip_info_new(); |
187 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
188 | listnode_add(list, rinfo); | |
bce8e868 | 189 | |
d62a17ae | 190 | if (rip_route_rte(rinfo)) { |
045c5389 RW |
191 | rip_timeout_update(rip, rinfo); |
192 | rip_zebra_ipv4_add(rip, rp); | |
d62a17ae | 193 | } |
bce8e868 | 194 | |
d62a17ae | 195 | /* Set the route change flag on the first entry. */ |
196 | rinfo = listgetdata(listhead(list)); | |
197 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 198 | |
d62a17ae | 199 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 200 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 201 | |
d62a17ae | 202 | return rinfo; |
bce8e868 LF |
203 | } |
204 | ||
205 | /* Replace the ECMP list with the new route. | |
206 | * RETURN: the new entry added in the list | |
207 | */ | |
045c5389 | 208 | struct rip_info *rip_ecmp_replace(struct rip *rip, struct rip_info *rinfo_new) |
d62a17ae | 209 | { |
210 | struct route_node *rp = rinfo_new->rp; | |
211 | struct list *list = (struct list *)rp->info; | |
212 | struct rip_info *rinfo = NULL, *tmp_rinfo = NULL; | |
213 | struct listnode *node = NULL, *nextnode = NULL; | |
214 | ||
215 | if (list == NULL || listcount(list) == 0) | |
045c5389 | 216 | return rip_ecmp_add(rip, rinfo_new); |
d62a17ae | 217 | |
218 | /* Get the first entry */ | |
219 | rinfo = listgetdata(listhead(list)); | |
220 | ||
221 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
222 | if (rip_route_rte(rinfo) && !rip_route_rte(rinfo_new)) | |
223 | if (CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 224 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 225 | |
226 | /* Re-use the first entry, and delete the others. */ | |
227 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
228 | if (tmp_rinfo != rinfo) { | |
229 | RIP_TIMER_OFF(tmp_rinfo->t_timeout); | |
230 | RIP_TIMER_OFF(tmp_rinfo->t_garbage_collect); | |
231 | list_delete_node(list, node); | |
232 | rip_info_free(tmp_rinfo); | |
233 | } | |
718e3744 | 234 | |
d62a17ae | 235 | RIP_TIMER_OFF(rinfo->t_timeout); |
236 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
237 | memcpy(rinfo, rinfo_new, sizeof(struct rip_info)); | |
718e3744 | 238 | |
d62a17ae | 239 | if (rip_route_rte(rinfo)) { |
045c5389 | 240 | rip_timeout_update(rip, rinfo); |
d62a17ae | 241 | /* The ADD message implies an update. */ |
045c5389 | 242 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 243 | } |
718e3744 | 244 | |
d62a17ae | 245 | /* Set the route change flag. */ |
246 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
718e3744 | 247 | |
d62a17ae | 248 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 249 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 250 | |
d62a17ae | 251 | return rinfo; |
bce8e868 LF |
252 | } |
253 | ||
254 | /* Delete one route from the ECMP list. | |
255 | * RETURN: | |
256 | * null - the entry is freed, and other entries exist in the list | |
257 | * the entry - the entry is the last one in the list; its metric is set | |
258 | * to INFINITY, and the garbage collector is started for it | |
259 | */ | |
045c5389 | 260 | struct rip_info *rip_ecmp_delete(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 261 | { |
262 | struct route_node *rp = rinfo->rp; | |
263 | struct list *list = (struct list *)rp->info; | |
264 | ||
265 | RIP_TIMER_OFF(rinfo->t_timeout); | |
266 | ||
267 | if (listcount(list) > 1) { | |
268 | /* Some other ECMP entries still exist. Just delete this entry. | |
269 | */ | |
270 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
271 | listnode_delete(list, rinfo); | |
272 | if (rip_route_rte(rinfo) | |
273 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
274 | /* The ADD message implies the update. */ | |
045c5389 | 275 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 276 | rip_info_free(rinfo); |
277 | rinfo = NULL; | |
278 | } else { | |
279 | assert(rinfo == listgetdata(listhead(list))); | |
280 | ||
281 | /* This is the only entry left in the list. We must keep it in | |
282 | * the list for garbage collection time, with INFINITY metric. | |
283 | */ | |
284 | ||
285 | rinfo->metric = RIP_METRIC_INFINITY; | |
286 | RIP_TIMER_ON(rinfo->t_garbage_collect, rip_garbage_collect, | |
287 | rip->garbage_time); | |
288 | ||
289 | if (rip_route_rte(rinfo) | |
290 | && CHECK_FLAG(rinfo->flags, RIP_RTF_FIB)) | |
045c5389 | 291 | rip_zebra_ipv4_delete(rip, rp); |
d62a17ae | 292 | } |
bce8e868 | 293 | |
d62a17ae | 294 | /* Set the route change flag on the first entry. */ |
295 | rinfo = listgetdata(listhead(list)); | |
296 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
bce8e868 | 297 | |
d62a17ae | 298 | /* Signal the output process to trigger an update (see section 2.5). */ |
045c5389 | 299 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
bce8e868 | 300 | |
d62a17ae | 301 | return rinfo; |
bce8e868 LF |
302 | } |
303 | ||
304 | /* Timeout RIP routes. */ | |
d62a17ae | 305 | static int rip_timeout(struct thread *t) |
bce8e868 | 306 | { |
045c5389 RW |
307 | struct rip_info *rinfo = THREAD_ARG(t); |
308 | struct rip *rip = rip_info_get_instance(rinfo); | |
309 | ||
310 | rip_ecmp_delete(rip, rinfo); | |
311 | ||
d62a17ae | 312 | return 0; |
718e3744 | 313 | } |
314 | ||
045c5389 | 315 | static void rip_timeout_update(struct rip *rip, struct rip_info *rinfo) |
718e3744 | 316 | { |
d62a17ae | 317 | if (rinfo->metric != RIP_METRIC_INFINITY) { |
318 | RIP_TIMER_OFF(rinfo->t_timeout); | |
045c5389 RW |
319 | thread_add_timer(master, rip_timeout, rinfo, rip->timeout_time, |
320 | &rinfo->t_timeout); | |
d62a17ae | 321 | } |
322 | } | |
323 | ||
324 | static int rip_filter(int rip_distribute, struct prefix_ipv4 *p, | |
325 | struct rip_interface *ri) | |
326 | { | |
327 | struct distribute *dist; | |
328 | struct access_list *alist; | |
329 | struct prefix_list *plist; | |
330 | int distribute = rip_distribute == RIP_FILTER_OUT ? DISTRIBUTE_V4_OUT | |
331 | : DISTRIBUTE_V4_IN; | |
332 | const char *inout = rip_distribute == RIP_FILTER_OUT ? "out" : "in"; | |
333 | ||
334 | /* Input distribute-list filtering. */ | |
335 | if (ri->list[rip_distribute]) { | |
336 | if (access_list_apply(ri->list[rip_distribute], | |
337 | (struct prefix *)p) | |
338 | == FILTER_DENY) { | |
339 | if (IS_RIP_DEBUG_PACKET) | |
f42238f8 | 340 | zlog_debug("%pFX filtered by distribute %s", p, |
d62a17ae | 341 | inout); |
342 | return -1; | |
718e3744 | 343 | } |
718e3744 | 344 | } |
d62a17ae | 345 | if (ri->prefix[rip_distribute]) { |
346 | if (prefix_list_apply(ri->prefix[rip_distribute], | |
347 | (struct prefix *)p) | |
348 | == PREFIX_DENY) { | |
349 | if (IS_RIP_DEBUG_PACKET) | |
f42238f8 | 350 | zlog_debug("%pFX filtered by prefix-list %s", p, |
d62a17ae | 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( | |
f42238f8 DS |
368 | "%pFX filtered by distribute %s", |
369 | p, inout); | |
d62a17ae | 370 | return -1; |
371 | } | |
372 | } | |
373 | } | |
374 | if (dist->prefix[distribute]) { | |
375 | plist = prefix_list_lookup(AFI_IP, | |
376 | dist->prefix[distribute]); | |
377 | ||
378 | if (plist) { | |
379 | if (prefix_list_apply(plist, (struct prefix *)p) | |
380 | == PREFIX_DENY) { | |
381 | if (IS_RIP_DEBUG_PACKET) | |
382 | zlog_debug( | |
f42238f8 DS |
383 | "%pFX filtered by prefix-list %s", |
384 | p, inout); | |
d62a17ae | 385 | return -1; |
386 | } | |
387 | } | |
388 | } | |
389 | } | |
390 | return 0; | |
718e3744 | 391 | } |
392 | ||
393 | /* Check nexthop address validity. */ | |
045c5389 | 394 | static int rip_nexthop_check(struct rip *rip, struct in_addr *addr) |
718e3744 | 395 | { |
d62a17ae | 396 | struct interface *ifp; |
f4e14fdb | 397 | struct listnode *cnode; |
d62a17ae | 398 | struct connected *ifc; |
399 | struct prefix *p; | |
718e3744 | 400 | |
d62a17ae | 401 | /* If nexthop address matches local configured address then it is |
402 | invalid nexthop. */ | |
b2d7c082 | 403 | |
ae7b826a | 404 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 405 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, ifc)) { |
406 | p = ifc->address; | |
718e3744 | 407 | |
d62a17ae | 408 | if (p->family == AF_INET |
409 | && IPV4_ADDR_SAME(&p->u.prefix4, addr)) | |
410 | return -1; | |
411 | } | |
718e3744 | 412 | } |
d62a17ae | 413 | return 0; |
718e3744 | 414 | } |
415 | ||
416 | /* RIP add route to routing table. */ | |
d62a17ae | 417 | static void rip_rte_process(struct rte *rte, struct sockaddr_in *from, |
418 | struct interface *ifp) | |
419 | { | |
045c5389 | 420 | struct rip *rip; |
d62a17ae | 421 | int ret; |
422 | struct prefix_ipv4 p; | |
423 | struct route_node *rp; | |
424 | struct rip_info *rinfo = NULL, newinfo; | |
425 | struct rip_interface *ri; | |
426 | struct in_addr *nexthop; | |
427 | int same = 0; | |
428 | unsigned char old_dist, new_dist; | |
429 | struct list *list = NULL; | |
430 | struct listnode *node = NULL; | |
431 | ||
432 | /* Make prefix structure. */ | |
433 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
434 | p.family = AF_INET; | |
435 | p.prefix = rte->prefix; | |
436 | p.prefixlen = ip_masklen(rte->mask); | |
437 | ||
438 | /* Make sure mask is applied. */ | |
439 | apply_mask_ipv4(&p); | |
440 | ||
d62a17ae | 441 | ri = ifp->info; |
045c5389 | 442 | rip = ri->rip; |
718e3744 | 443 | |
045c5389 | 444 | /* Apply input filters. */ |
d62a17ae | 445 | ret = rip_filter(RIP_FILTER_IN, &p, ri); |
446 | if (ret < 0) | |
447 | return; | |
448 | ||
449 | memset(&newinfo, 0, sizeof(newinfo)); | |
450 | newinfo.type = ZEBRA_ROUTE_RIP; | |
451 | newinfo.sub_type = RIP_ROUTE_RTE; | |
dd127197 | 452 | newinfo.nh.gate.ipv4 = rte->nexthop; |
d62a17ae | 453 | newinfo.from = from->sin_addr; |
dd127197 DS |
454 | newinfo.nh.ifindex = ifp->ifindex; |
455 | newinfo.nh.type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
d62a17ae | 456 | newinfo.metric = rte->metric; |
457 | newinfo.metric_out = rte->metric; /* XXX */ | |
458 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
459 | ||
460 | /* Modify entry according to the interface routemap. */ | |
461 | if (ri->routemap[RIP_FILTER_IN]) { | |
d62a17ae | 462 | /* The object should be of the type of rip_info */ |
463 | ret = route_map_apply(ri->routemap[RIP_FILTER_IN], | |
1782514f | 464 | (struct prefix *)&p, &newinfo); |
d62a17ae | 465 | |
466 | if (ret == RMAP_DENYMATCH) { | |
467 | if (IS_RIP_DEBUG_PACKET) | |
468 | zlog_debug( | |
53bb7f9b MS |
469 | "RIP %pFX is filtered by route-map in", |
470 | &p); | |
d62a17ae | 471 | return; |
472 | } | |
473 | ||
474 | /* Get back the object */ | |
475 | rte->nexthop = newinfo.nexthop_out; | |
476 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
996c9314 LB |
477 | rte->metric = newinfo.metric_out; /* XXX: the routemap uses the |
478 | metric_out field */ | |
d62a17ae | 479 | } |
480 | ||
481 | /* Once the entry has been validated, update the metric by | |
ab9939f2 | 482 | adding the cost of the network on which the message |
d62a17ae | 483 | arrived. If the result is greater than infinity, use infinity |
484 | (RFC2453 Sec. 3.9.2) */ | |
485 | /* Zebra ripd can handle offset-list in. */ | |
486 | ret = rip_offset_list_apply_in(&p, ifp, &rte->metric); | |
718e3744 | 487 | |
d62a17ae | 488 | /* If offset-list does not modify the metric use interface's |
489 | metric. */ | |
490 | if (!ret) | |
491 | rte->metric += ifp->metric ? ifp->metric : 1; | |
718e3744 | 492 | |
d62a17ae | 493 | if (rte->metric > RIP_METRIC_INFINITY) |
494 | rte->metric = RIP_METRIC_INFINITY; | |
495 | ||
496 | /* Set nexthop pointer. */ | |
3a6290bd | 497 | if (rte->nexthop.s_addr == INADDR_ANY) |
d62a17ae | 498 | nexthop = &from->sin_addr; |
499 | else | |
500 | nexthop = &rte->nexthop; | |
501 | ||
502 | /* Check if nexthop address is myself, then do nothing. */ | |
045c5389 | 503 | if (rip_nexthop_check(rip, nexthop) < 0) { |
d62a17ae | 504 | if (IS_RIP_DEBUG_PACKET) |
53bb7f9b MS |
505 | zlog_debug("Nexthop address %pI4 is myself", |
506 | nexthop); | |
d62a17ae | 507 | return; |
508 | } | |
509 | ||
510 | /* Get index for the prefix. */ | |
511 | rp = route_node_get(rip->table, (struct prefix *)&p); | |
512 | ||
513 | newinfo.rp = rp; | |
dd127197 DS |
514 | newinfo.nh.gate.ipv4 = *nexthop; |
515 | newinfo.nh.type = NEXTHOP_TYPE_IPV4; | |
d62a17ae | 516 | newinfo.metric = rte->metric; |
517 | newinfo.tag = ntohs(rte->tag); | |
045c5389 | 518 | newinfo.distance = rip_distance_apply(rip, &newinfo); |
d62a17ae | 519 | |
520 | new_dist = newinfo.distance ? newinfo.distance | |
521 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
522 | ||
523 | /* Check to see whether there is already RIP route on the table. */ | |
524 | if ((list = rp->info) != NULL) | |
525 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
526 | /* Need to compare with redistributed entry or local | |
527 | * entry */ | |
528 | if (!rip_route_rte(rinfo)) | |
529 | break; | |
530 | ||
531 | if (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 532 | && IPV4_ADDR_SAME(&rinfo->nh.gate.ipv4, nexthop)) |
d62a17ae | 533 | break; |
534 | ||
535 | if (!listnextnode(node)) { | |
536 | /* Not found in the list */ | |
537 | ||
538 | if (rte->metric > rinfo->metric) { | |
539 | /* New route has a greater metric. | |
540 | * Discard it. */ | |
541 | route_unlock_node(rp); | |
542 | return; | |
543 | } | |
544 | ||
545 | if (rte->metric < rinfo->metric) | |
546 | /* New route has a smaller metric. | |
547 | * Replace the ECMP list | |
548 | * with the new one in below. */ | |
549 | break; | |
550 | ||
551 | /* Metrics are same. We compare the distances. | |
552 | */ | |
553 | old_dist = rinfo->distance | |
554 | ? rinfo->distance | |
555 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
556 | ||
557 | if (new_dist > old_dist) { | |
558 | /* New route has a greater distance. | |
559 | * Discard it. */ | |
560 | route_unlock_node(rp); | |
561 | return; | |
562 | } | |
563 | ||
564 | if (new_dist < old_dist) | |
565 | /* New route has a smaller distance. | |
566 | * Replace the ECMP list | |
567 | * with the new one in below. */ | |
568 | break; | |
569 | ||
570 | /* Metrics and distances are both same. Keep | |
571 | * "rinfo" null and | |
572 | * the new route is added in the ECMP list in | |
573 | * below. */ | |
574 | } | |
718e3744 | 575 | } |
d62a17ae | 576 | |
577 | if (rinfo) { | |
578 | /* Local static route. */ | |
579 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
580 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
581 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT)) | |
582 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
583 | route_unlock_node(rp); | |
584 | return; | |
718e3744 | 585 | } |
d62a17ae | 586 | |
587 | /* Redistributed route check. */ | |
588 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
589 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
590 | old_dist = rinfo->distance; | |
591 | /* Only routes directly connected to an interface | |
592 | * (nexthop == 0) | |
593 | * may have a valid NULL distance */ | |
3a6290bd | 594 | if (rinfo->nh.gate.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 595 | old_dist = old_dist |
596 | ? old_dist | |
597 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
598 | /* If imported route does not have STRICT precedence, | |
599 | mark it as a ghost */ | |
600 | if (new_dist <= old_dist | |
601 | && rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 602 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 603 | |
604 | route_unlock_node(rp); | |
605 | return; | |
718e3744 | 606 | } |
d62a17ae | 607 | } |
608 | ||
609 | if (!rinfo) { | |
610 | if (rp->info) | |
611 | route_unlock_node(rp); | |
612 | ||
613 | /* Now, check to see whether there is already an explicit route | |
614 | for the destination prefix. If there is no such route, add | |
615 | this route to the routing table, unless the metric is | |
616 | infinity (there is no point in adding a route which | |
617 | unusable). */ | |
618 | if (rte->metric != RIP_METRIC_INFINITY) | |
045c5389 | 619 | rip_ecmp_add(rip, &newinfo); |
d62a17ae | 620 | } else { |
621 | /* Route is there but we are not sure the route is RIP or not. | |
622 | */ | |
623 | ||
624 | /* If there is an existing route, compare the next hop address | |
625 | to the address of the router from which the datagram came. | |
626 | If this datagram is from the same router as the existing | |
627 | route, reinitialize the timeout. */ | |
628 | same = (IPV4_ADDR_SAME(&rinfo->from, &from->sin_addr) | |
dd127197 | 629 | && (rinfo->nh.ifindex == ifp->ifindex)); |
d62a17ae | 630 | |
631 | old_dist = rinfo->distance ? rinfo->distance | |
632 | : ZEBRA_RIP_DISTANCE_DEFAULT; | |
633 | ||
634 | /* Next, compare the metrics. If the datagram is from the same | |
635 | router as the existing route, and the new metric is different | |
636 | than the old one; or, if the new metric is lower than the old | |
637 | one, or if the tag has been changed; or if there is a route | |
638 | with a lower administrave distance; or an update of the | |
639 | distance on the actual route; do the following actions: */ | |
640 | if ((same && rinfo->metric != rte->metric) | |
641 | || (rte->metric < rinfo->metric) | |
642 | || ((same) && (rinfo->metric == rte->metric) | |
643 | && (newinfo.tag != rinfo->tag)) | |
644 | || (old_dist > new_dist) | |
645 | || ((old_dist != new_dist) && same)) { | |
646 | if (listcount(list) == 1) { | |
647 | if (newinfo.metric != RIP_METRIC_INFINITY) | |
045c5389 | 648 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 649 | else |
045c5389 | 650 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 651 | } else { |
652 | if (newinfo.metric < rinfo->metric) | |
045c5389 | 653 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 654 | else if (newinfo.metric > rinfo->metric) |
045c5389 | 655 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 656 | else if (new_dist < old_dist) |
045c5389 | 657 | rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 658 | else if (new_dist > old_dist) |
045c5389 | 659 | rip_ecmp_delete(rip, rinfo); |
d62a17ae | 660 | else { |
661 | int update = CHECK_FLAG(rinfo->flags, | |
662 | RIP_RTF_FIB) | |
663 | ? 1 | |
664 | : 0; | |
665 | ||
666 | assert(newinfo.metric | |
667 | != RIP_METRIC_INFINITY); | |
668 | ||
669 | RIP_TIMER_OFF(rinfo->t_timeout); | |
670 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
671 | memcpy(rinfo, &newinfo, | |
672 | sizeof(struct rip_info)); | |
045c5389 | 673 | rip_timeout_update(rip, rinfo); |
d62a17ae | 674 | |
675 | if (update) | |
045c5389 | 676 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 677 | |
678 | /* - Set the route change flag on the | |
679 | * first entry. */ | |
680 | rinfo = listgetdata(listhead(list)); | |
681 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
045c5389 | 682 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 683 | } |
684 | } | |
685 | } else /* same & no change */ | |
045c5389 | 686 | rip_timeout_update(rip, rinfo); |
d62a17ae | 687 | |
688 | /* Unlock tempolary lock of the route. */ | |
689 | route_unlock_node(rp); | |
690 | } | |
691 | } | |
692 | ||
693 | /* Dump RIP packet */ | |
694 | static void rip_packet_dump(struct rip_packet *packet, int size, | |
695 | const char *sndrcv) | |
696 | { | |
697 | caddr_t lim; | |
698 | struct rte *rte; | |
699 | const char *command_str; | |
d7c0a89a QY |
700 | uint8_t netmask = 0; |
701 | uint8_t *p; | |
d62a17ae | 702 | |
703 | /* Set command string. */ | |
704 | if (packet->command > 0 && packet->command < RIP_COMMAND_MAX) | |
705 | command_str = lookup_msg(rip_msg, packet->command, NULL); | |
706 | else | |
707 | command_str = "unknown"; | |
708 | ||
709 | /* Dump packet header. */ | |
710 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
711 | packet->version, size); | |
712 | ||
713 | /* Dump each routing table entry. */ | |
714 | rte = packet->rte; | |
715 | ||
716 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
717 | if (packet->version == RIPv2) { | |
718 | netmask = ip_masklen(rte->mask); | |
719 | ||
720 | if (rte->family == htons(RIP_FAMILY_AUTH)) { | |
721 | if (rte->tag | |
722 | == htons(RIP_AUTH_SIMPLE_PASSWORD)) { | |
d7c0a89a | 723 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 724 | |
725 | zlog_debug( | |
726 | " family 0x%X type %d auth string: %s", | |
727 | ntohs(rte->family), | |
728 | ntohs(rte->tag), p); | |
729 | } else if (rte->tag == htons(RIP_AUTH_MD5)) { | |
730 | struct rip_md5_info *md5; | |
731 | ||
732 | md5 = (struct rip_md5_info *)&packet | |
733 | ->rte; | |
734 | ||
735 | zlog_debug( | |
736 | " family 0x%X type %d (MD5 authentication)", | |
737 | ntohs(md5->family), | |
738 | ntohs(md5->type)); | |
739 | zlog_debug( | |
3efd0893 | 740 | " RIP-2 packet len %d Key ID %d Auth Data len %d", |
d62a17ae | 741 | ntohs(md5->packet_len), |
742 | md5->keyid, md5->auth_len); | |
d7c0a89a QY |
743 | zlog_debug(" Sequence Number %ld", |
744 | (unsigned long)ntohl( | |
745 | md5->sequence)); | |
d62a17ae | 746 | } else if (rte->tag == htons(RIP_AUTH_DATA)) { |
d7c0a89a | 747 | p = (uint8_t *)&rte->prefix; |
d62a17ae | 748 | |
749 | zlog_debug( | |
750 | " family 0x%X type %d (MD5 data)", | |
751 | ntohs(rte->family), | |
752 | ntohs(rte->tag)); | |
753 | zlog_debug( | |
3efd0893 | 754 | " MD5: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", |
d62a17ae | 755 | p[0], p[1], p[2], p[3], p[4], |
756 | p[5], p[6], p[7], p[8], p[9], | |
757 | p[10], p[11], p[12], p[13], | |
758 | p[14], p[15]); | |
759 | } else { | |
760 | zlog_debug( | |
761 | " family 0x%X type %d (Unknown auth type)", | |
762 | ntohs(rte->family), | |
763 | ntohs(rte->tag)); | |
764 | } | |
765 | } else | |
766 | zlog_debug( | |
2e2262fe | 767 | " %pI4/%d -> %pI4 family %d tag %" ROUTE_TAG_PRI |
d62a17ae | 768 | " metric %ld", |
2e2262fe | 769 | &rte->prefix, netmask, &rte->nexthop, |
d62a17ae | 770 | ntohs(rte->family), |
771 | (route_tag_t)ntohs(rte->tag), | |
d7c0a89a | 772 | (unsigned long)ntohl(rte->metric)); |
d62a17ae | 773 | } else { |
2e2262fe DS |
774 | zlog_debug(" %pI4 family %d tag %" ROUTE_TAG_PRI |
775 | " metric %ld", | |
776 | &rte->prefix, ntohs(rte->family), | |
777 | (route_tag_t)ntohs(rte->tag), | |
778 | (unsigned long)ntohl(rte->metric)); | |
718e3744 | 779 | } |
718e3744 | 780 | } |
718e3744 | 781 | } |
782 | ||
783 | /* Check if the destination address is valid (unicast; not net 0 | |
784 | or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't | |
785 | check net 0 because we accept default route. */ | |
d62a17ae | 786 | static int rip_destination_check(struct in_addr addr) |
718e3744 | 787 | { |
d7c0a89a | 788 | uint32_t destination; |
718e3744 | 789 | |
d62a17ae | 790 | /* Convert to host byte order. */ |
791 | destination = ntohl(addr.s_addr); | |
718e3744 | 792 | |
d62a17ae | 793 | if (IPV4_NET127(destination)) |
794 | return 0; | |
718e3744 | 795 | |
d62a17ae | 796 | /* Net 0 may match to the default route. */ |
797 | if (IPV4_NET0(destination) && destination != 0) | |
798 | return 0; | |
718e3744 | 799 | |
d62a17ae | 800 | /* Unicast address must belong to class A, B, C. */ |
801 | if (IN_CLASSA(destination)) | |
802 | return 1; | |
803 | if (IN_CLASSB(destination)) | |
804 | return 1; | |
805 | if (IN_CLASSC(destination)) | |
806 | return 1; | |
718e3744 | 807 | |
d62a17ae | 808 | return 0; |
718e3744 | 809 | } |
810 | ||
811 | /* RIP version 2 authentication. */ | |
d62a17ae | 812 | static int rip_auth_simple_password(struct rte *rte, struct sockaddr_in *from, |
813 | struct interface *ifp) | |
814 | { | |
815 | struct rip_interface *ri; | |
0961ea93 | 816 | char *auth_str = (char *)rte + offsetof(struct rte, prefix); |
d62a17ae | 817 | int i; |
818 | ||
819 | /* reject passwords with zeros in the middle of the string */ | |
0961ea93 | 820 | for (i = strnlen(auth_str, 16); i < 16; i++) { |
d62a17ae | 821 | if (auth_str[i] != '\0') |
822 | return 0; | |
823 | } | |
824 | ||
825 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
826 | zlog_debug("RIPv2 simple password authentication from %pI4", |
827 | &from->sin_addr); | |
d62a17ae | 828 | |
829 | ri = ifp->info; | |
830 | ||
831 | if (ri->auth_type != RIP_AUTH_SIMPLE_PASSWORD | |
832 | || rte->tag != htons(RIP_AUTH_SIMPLE_PASSWORD)) | |
833 | return 0; | |
718e3744 | 834 | |
d62a17ae | 835 | /* Simple password authentication. */ |
836 | if (ri->auth_str) { | |
837 | if (strncmp(auth_str, ri->auth_str, 16) == 0) | |
838 | return 1; | |
839 | } | |
840 | if (ri->key_chain) { | |
841 | struct keychain *keychain; | |
842 | struct key *key; | |
843 | ||
844 | keychain = keychain_lookup(ri->key_chain); | |
c4efb224 | 845 | if (keychain == NULL || keychain->key == NULL) |
d62a17ae | 846 | return 0; |
847 | ||
848 | key = key_match_for_accept(keychain, auth_str); | |
849 | if (key) | |
850 | return 1; | |
851 | } | |
852 | return 0; | |
718e3744 | 853 | } |
854 | ||
855 | /* RIP version 2 authentication with MD5. */ | |
d62a17ae | 856 | static int rip_auth_md5(struct rip_packet *packet, struct sockaddr_in *from, |
857 | int length, struct interface *ifp) | |
858 | { | |
859 | struct rip_interface *ri; | |
860 | struct rip_md5_info *md5; | |
861 | struct rip_md5_data *md5data; | |
862 | struct keychain *keychain; | |
863 | struct key *key; | |
0513a271 MR |
864 | #ifdef CRYPTO_OPENSSL |
865 | EVP_MD_CTX *ctx; | |
866 | #elif CRYPTO_INTERNAL | |
d62a17ae | 867 | MD5_CTX ctx; |
0513a271 | 868 | #endif |
d7c0a89a QY |
869 | uint8_t digest[RIP_AUTH_MD5_SIZE]; |
870 | uint16_t packet_len; | |
5c84f238 | 871 | char auth_str[RIP_AUTH_MD5_SIZE] = {}; |
d62a17ae | 872 | |
873 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
874 | zlog_debug("RIPv2 MD5 authentication from %pI4", |
875 | &from->sin_addr); | |
718e3744 | 876 | |
d62a17ae | 877 | ri = ifp->info; |
878 | md5 = (struct rip_md5_info *)&packet->rte; | |
879 | ||
880 | /* Check auth type. */ | |
881 | if (ri->auth_type != RIP_AUTH_MD5 || md5->type != htons(RIP_AUTH_MD5)) | |
882 | return 0; | |
883 | ||
884 | /* If the authentication length is less than 16, then it must be wrong | |
885 | * for | |
886 | * any interpretation of rfc2082. Some implementations also interpret | |
887 | * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka | |
888 | * RIP_AUTH_MD5_COMPAT_SIZE. | |
889 | */ | |
890 | if (!((md5->auth_len == RIP_AUTH_MD5_SIZE) | |
891 | || (md5->auth_len == RIP_AUTH_MD5_COMPAT_SIZE))) { | |
892 | if (IS_RIP_DEBUG_EVENT) | |
893 | zlog_debug( | |
3efd0893 | 894 | "RIPv2 MD5 authentication, strange authentication length field %d", |
d62a17ae | 895 | md5->auth_len); |
896 | return 0; | |
897 | } | |
898 | ||
899 | /* grab and verify check packet length */ | |
900 | packet_len = ntohs(md5->packet_len); | |
718e3744 | 901 | |
d62a17ae | 902 | if (packet_len > (length - RIP_HEADER_SIZE - RIP_AUTH_MD5_SIZE)) { |
903 | if (IS_RIP_DEBUG_EVENT) | |
904 | zlog_debug( | |
3efd0893 | 905 | "RIPv2 MD5 authentication, packet length field %d greater than received length %d!", |
d62a17ae | 906 | md5->packet_len, length); |
907 | return 0; | |
908 | } | |
909 | ||
910 | /* retrieve authentication data */ | |
d7c0a89a | 911 | md5data = (struct rip_md5_data *)(((uint8_t *)packet) + packet_len); |
d62a17ae | 912 | |
d62a17ae | 913 | if (ri->key_chain) { |
914 | keychain = keychain_lookup(ri->key_chain); | |
915 | if (keychain == NULL) | |
916 | return 0; | |
917 | ||
918 | key = key_lookup_for_accept(keychain, md5->keyid); | |
e65e227f | 919 | if (key == NULL || key->string == NULL) |
d62a17ae | 920 | return 0; |
921 | ||
b5b4f44e IR |
922 | memcpy(auth_str, key->string, |
923 | MIN(sizeof(auth_str), strlen(key->string))); | |
d62a17ae | 924 | } else if (ri->auth_str) |
b5b4f44e IR |
925 | memcpy(auth_str, ri->auth_str, |
926 | MIN(sizeof(auth_str), strlen(ri->auth_str))); | |
d62a17ae | 927 | |
928 | if (auth_str[0] == 0) | |
929 | return 0; | |
930 | ||
931 | /* MD5 digest authentication. */ | |
0513a271 MR |
932 | #ifdef CRYPTO_OPENSSL |
933 | unsigned int md5_size = RIP_AUTH_MD5_SIZE; | |
934 | ctx = EVP_MD_CTX_new(); | |
935 | EVP_DigestInit(ctx, EVP_md5()); | |
936 | EVP_DigestUpdate(ctx, packet, packet_len + RIP_HEADER_SIZE); | |
937 | EVP_DigestUpdate(ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
938 | EVP_DigestFinal(ctx, digest, &md5_size); | |
939 | EVP_MD_CTX_free(ctx); | |
940 | #elif CRYPTO_INTERNAL | |
d62a17ae | 941 | memset(&ctx, 0, sizeof(ctx)); |
942 | MD5Init(&ctx); | |
943 | MD5Update(&ctx, packet, packet_len + RIP_HEADER_SIZE); | |
944 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
945 | MD5Final(digest, &ctx); | |
0513a271 | 946 | #endif |
d62a17ae | 947 | |
948 | if (memcmp(md5data->digest, digest, RIP_AUTH_MD5_SIZE) == 0) | |
949 | return packet_len; | |
950 | else | |
951 | return 0; | |
718e3744 | 952 | } |
953 | ||
b14ee00b | 954 | /* Pick correct auth string for sends, prepare auth_str buffer for use. |
955 | * (left justified and padded). | |
956 | * | |
957 | * presumes one of ri or key is valid, and that the auth strings they point | |
958 | * to are nul terminated. If neither are present, auth_str will be fully | |
959 | * zero padded. | |
960 | * | |
961 | */ | |
d62a17ae | 962 | static void rip_auth_prepare_str_send(struct rip_interface *ri, struct key *key, |
963 | char *auth_str, int len) | |
718e3744 | 964 | { |
d62a17ae | 965 | assert(ri || key); |
718e3744 | 966 | |
d62a17ae | 967 | memset(auth_str, 0, len); |
968 | if (key && key->string) | |
b5b4f44e IR |
969 | memcpy(auth_str, key->string, |
970 | MIN((size_t)len, strlen(key->string))); | |
d62a17ae | 971 | else if (ri->auth_str) |
b5b4f44e IR |
972 | memcpy(auth_str, ri->auth_str, |
973 | MIN((size_t)len, strlen(ri->auth_str))); | |
718e3744 | 974 | |
d62a17ae | 975 | return; |
b14ee00b | 976 | } |
718e3744 | 977 | |
b14ee00b | 978 | /* Write RIPv2 simple password authentication information |
979 | * | |
d62a17ae | 980 | * auth_str is presumed to be 2 bytes and correctly prepared |
b14ee00b | 981 | * (left justified and zero padded). |
982 | */ | |
d62a17ae | 983 | static void rip_auth_simple_write(struct stream *s, char *auth_str, int len) |
b14ee00b | 984 | { |
d62a17ae | 985 | assert(s && len == RIP_AUTH_SIMPLE_SIZE); |
986 | ||
987 | stream_putw(s, RIP_FAMILY_AUTH); | |
988 | stream_putw(s, RIP_AUTH_SIMPLE_PASSWORD); | |
989 | stream_put(s, auth_str, RIP_AUTH_SIMPLE_SIZE); | |
990 | ||
991 | return; | |
b14ee00b | 992 | } |
718e3744 | 993 | |
d62a17ae | 994 | /* write RIPv2 MD5 "authentication header" |
b14ee00b | 995 | * (uses the auth key data field) |
996 | * | |
997 | * Digest offset field is set to 0. | |
998 | * | |
999 | * returns: offset of the digest offset field, which must be set when | |
1000 | * length to the auth-data MD5 digest is known. | |
1001 | */ | |
d62a17ae | 1002 | static size_t rip_auth_md5_ah_write(struct stream *s, struct rip_interface *ri, |
1003 | struct key *key) | |
1004 | { | |
1005 | size_t doff = 0; | |
1006 | ||
1007 | assert(s && ri && ri->auth_type == RIP_AUTH_MD5); | |
1008 | ||
1009 | /* MD5 authentication. */ | |
1010 | stream_putw(s, RIP_FAMILY_AUTH); | |
1011 | stream_putw(s, RIP_AUTH_MD5); | |
1012 | ||
1013 | /* MD5 AH digest offset field. | |
1014 | * | |
1015 | * Set to placeholder value here, to true value when RIP-2 Packet length | |
1016 | * is known. Actual value is set in .....(). | |
1017 | */ | |
1018 | doff = stream_get_endp(s); | |
1019 | stream_putw(s, 0); | |
1020 | ||
1021 | /* Key ID. */ | |
1022 | if (key) | |
1023 | stream_putc(s, key->index % 256); | |
1024 | else | |
1025 | stream_putc(s, 1); | |
1026 | ||
1027 | /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds | |
1028 | * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for | |
1029 | * this | |
1030 | * to be configurable. | |
1031 | */ | |
1032 | stream_putc(s, ri->md5_auth_len); | |
1033 | ||
1034 | /* Sequence Number (non-decreasing). */ | |
1035 | /* RFC2080: The value used in the sequence number is | |
1036 | arbitrary, but two suggestions are the time of the | |
1037 | message's creation or a simple message counter. */ | |
1038 | stream_putl(s, time(NULL)); | |
1039 | ||
1040 | /* Reserved field must be zero. */ | |
1041 | stream_putl(s, 0); | |
1042 | stream_putl(s, 0); | |
1043 | ||
1044 | return doff; | |
b14ee00b | 1045 | } |
1046 | ||
1047 | /* If authentication is in used, write the appropriate header | |
1048 | * returns stream offset to which length must later be written | |
1049 | * or 0 if this is not required | |
1050 | */ | |
d62a17ae | 1051 | static size_t rip_auth_header_write(struct stream *s, struct rip_interface *ri, |
1052 | struct key *key, char *auth_str, int len) | |
1053 | { | |
1054 | assert(ri->auth_type != RIP_NO_AUTH); | |
1055 | ||
1056 | switch (ri->auth_type) { | |
1057 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1058 | rip_auth_prepare_str_send(ri, key, auth_str, len); | |
1059 | rip_auth_simple_write(s, auth_str, len); | |
1060 | return 0; | |
1061 | case RIP_AUTH_MD5: | |
1062 | return rip_auth_md5_ah_write(s, ri, key); | |
1063 | } | |
1064 | assert(1); | |
1065 | return 0; | |
b14ee00b | 1066 | } |
1067 | ||
1068 | /* Write RIPv2 MD5 authentication data trailer */ | |
d62a17ae | 1069 | static void rip_auth_md5_set(struct stream *s, struct rip_interface *ri, |
1070 | size_t doff, char *auth_str, int authlen) | |
1071 | { | |
1072 | unsigned long len; | |
0513a271 MR |
1073 | #ifdef CRYPTO_OPENSSL |
1074 | EVP_MD_CTX *ctx; | |
1075 | #elif CRYPTO_INTERNAL | |
d62a17ae | 1076 | MD5_CTX ctx; |
0513a271 | 1077 | #endif |
d62a17ae | 1078 | unsigned char digest[RIP_AUTH_MD5_SIZE]; |
1079 | ||
1080 | /* Make it sure this interface is configured as MD5 | |
1081 | authentication. */ | |
1082 | assert((ri->auth_type == RIP_AUTH_MD5) | |
1083 | && (authlen == RIP_AUTH_MD5_SIZE)); | |
1084 | assert(doff > 0); | |
1085 | ||
1086 | /* Get packet length. */ | |
1087 | len = stream_get_endp(s); | |
1088 | ||
1089 | /* Check packet length. */ | |
1090 | if (len < (RIP_HEADER_SIZE + RIP_RTE_SIZE)) { | |
1c50c1c0 QY |
1091 | flog_err( |
1092 | EC_RIP_PACKET, | |
1093 | "rip_auth_md5_set(): packet length %ld is less than minimum length.", | |
1094 | len); | |
d62a17ae | 1095 | return; |
1096 | } | |
1097 | ||
1098 | /* Set the digest offset length in the header */ | |
1099 | stream_putw_at(s, doff, len); | |
1100 | ||
1101 | /* Set authentication data. */ | |
1102 | stream_putw(s, RIP_FAMILY_AUTH); | |
1103 | stream_putw(s, RIP_AUTH_DATA); | |
1104 | ||
1105 | /* Generate a digest for the RIP packet. */ | |
0513a271 MR |
1106 | #ifdef CRYPTO_OPENSSL |
1107 | unsigned int md5_size = RIP_AUTH_MD5_SIZE; | |
1108 | ctx = EVP_MD_CTX_new(); | |
1109 | EVP_DigestInit(ctx, EVP_md5()); | |
1110 | EVP_DigestUpdate(ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1111 | EVP_DigestUpdate(ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1112 | EVP_DigestFinal(ctx, digest, &md5_size); | |
1113 | EVP_MD_CTX_free(ctx); | |
1114 | #elif CRYPTO_INTERNAL | |
d62a17ae | 1115 | memset(&ctx, 0, sizeof(ctx)); |
1116 | MD5Init(&ctx); | |
1117 | MD5Update(&ctx, STREAM_DATA(s), stream_get_endp(s)); | |
1118 | MD5Update(&ctx, auth_str, RIP_AUTH_MD5_SIZE); | |
1119 | MD5Final(digest, &ctx); | |
0513a271 | 1120 | #endif |
d62a17ae | 1121 | |
1122 | /* Copy the digest to the packet. */ | |
1123 | stream_write(s, digest, RIP_AUTH_MD5_SIZE); | |
718e3744 | 1124 | } |
1125 | ||
1126 | /* RIP routing information. */ | |
d62a17ae | 1127 | static void rip_response_process(struct rip_packet *packet, int size, |
1128 | struct sockaddr_in *from, | |
1129 | struct connected *ifc) | |
1130 | { | |
045c5389 RW |
1131 | struct rip_interface *ri = ifc->ifp->info; |
1132 | struct rip *rip = ri->rip; | |
d62a17ae | 1133 | caddr_t lim; |
1134 | struct rte *rte; | |
1135 | struct prefix_ipv4 ifaddr; | |
1136 | struct prefix_ipv4 ifaddrclass; | |
1137 | int subnetted; | |
1138 | ||
1139 | memset(&ifaddr, 0, sizeof(ifaddr)); | |
1140 | /* We don't know yet. */ | |
1141 | subnetted = -1; | |
1142 | ||
1143 | /* The Response must be ignored if it is not from the RIP | |
1144 | port. (RFC2453 - Sec. 3.9.2)*/ | |
1145 | if (from->sin_port != htons(RIP_PORT_DEFAULT)) { | |
1146 | zlog_info("response doesn't come from RIP port: %d", | |
1147 | from->sin_port); | |
045c5389 | 1148 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1149 | return; |
718e3744 | 1150 | } |
1151 | ||
d62a17ae | 1152 | /* The datagram's IPv4 source address should be checked to see |
1153 | whether the datagram is from a valid neighbor; the source of the | |
1154 | datagram must be on a directly connected network (RFC2453 - Sec. | |
1155 | 3.9.2) */ | |
ae7b826a RW |
1156 | if (if_lookup_address((void *)&from->sin_addr, AF_INET, |
1157 | rip->vrf->vrf_id) | |
d62a17ae | 1158 | == NULL) { |
1159 | zlog_info( | |
53bb7f9b MS |
1160 | "This datagram doesn't come from a valid neighbor: %pI4", |
1161 | &from->sin_addr); | |
045c5389 | 1162 | rip_peer_bad_packet(rip, from); |
d62a17ae | 1163 | return; |
718e3744 | 1164 | } |
1165 | ||
d62a17ae | 1166 | /* It is also worth checking to see whether the response is from one |
1167 | of the router's own addresses. */ | |
1168 | ||
1169 | ; /* Alredy done in rip_read () */ | |
1170 | ||
1171 | /* Update RIP peer. */ | |
045c5389 | 1172 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1173 | |
1174 | /* Set RTE pointer. */ | |
1175 | rte = packet->rte; | |
1176 | ||
1177 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
1178 | /* RIPv2 authentication check. */ | |
1179 | /* If the Address Family Identifier of the first (and only the | |
1180 | first) entry in the message is 0xFFFF, then the remainder of | |
1181 | the entry contains the authentication. */ | |
1182 | /* If the packet gets here it means authentication enabled */ | |
1183 | /* Check is done in rip_read(). So, just skipping it */ | |
1184 | if (packet->version == RIPv2 && rte == packet->rte | |
1185 | && rte->family == htons(RIP_FAMILY_AUTH)) | |
1186 | continue; | |
1187 | ||
1188 | if (rte->family != htons(AF_INET)) { | |
1189 | /* Address family check. RIP only supports AF_INET. */ | |
53bb7f9b | 1190 | zlog_info("Unsupported family %d from %pI4", |
d62a17ae | 1191 | ntohs(rte->family), |
53bb7f9b | 1192 | &from->sin_addr); |
d62a17ae | 1193 | continue; |
718e3744 | 1194 | } |
d62a17ae | 1195 | |
1196 | /* - is the destination address valid (e.g., unicast; not net 0 | |
1197 | or 127) */ | |
1198 | if (!rip_destination_check(rte->prefix)) { | |
1199 | zlog_info( | |
1200 | "Network is net 0 or net 127 or it is not unicast network"); | |
045c5389 | 1201 | rip_peer_bad_route(rip, from); |
d62a17ae | 1202 | continue; |
718e3744 | 1203 | } |
1204 | ||
d62a17ae | 1205 | /* Convert metric value to host byte order. */ |
1206 | rte->metric = ntohl(rte->metric); | |
718e3744 | 1207 | |
d62a17ae | 1208 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1209 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
1210 | zlog_info("Route's metric is not in the 1-16 range."); | |
045c5389 | 1211 | rip_peer_bad_route(rip, from); |
d62a17ae | 1212 | continue; |
1213 | } | |
718e3744 | 1214 | |
d62a17ae | 1215 | /* RIPv1 does not have nexthop value. */ |
975a328e DA |
1216 | if (packet->version == RIPv1 |
1217 | && rte->nexthop.s_addr != INADDR_ANY) { | |
53bb7f9b MS |
1218 | zlog_info("RIPv1 packet with nexthop value %pI4", |
1219 | &rte->nexthop); | |
045c5389 | 1220 | rip_peer_bad_route(rip, from); |
d62a17ae | 1221 | continue; |
1222 | } | |
718e3744 | 1223 | |
d62a17ae | 1224 | /* That is, if the provided information is ignored, a possibly |
1225 | sub-optimal, but absolutely valid, route may be taken. If | |
1226 | the received Next Hop is not directly reachable, it should be | |
1227 | treated as 0.0.0.0. */ | |
975a328e DA |
1228 | if (packet->version == RIPv2 |
1229 | && rte->nexthop.s_addr != INADDR_ANY) { | |
d7c0a89a | 1230 | uint32_t addrval; |
d62a17ae | 1231 | |
1232 | /* Multicast address check. */ | |
1233 | addrval = ntohl(rte->nexthop.s_addr); | |
1234 | if (IN_CLASSD(addrval)) { | |
1235 | zlog_info( | |
53bb7f9b MS |
1236 | "Nexthop %pI4 is multicast address, skip this rte", |
1237 | &rte->nexthop); | |
d62a17ae | 1238 | continue; |
1239 | } | |
1240 | ||
1241 | if (!if_lookup_address((void *)&rte->nexthop, AF_INET, | |
ae7b826a | 1242 | rip->vrf->vrf_id)) { |
d62a17ae | 1243 | struct route_node *rn; |
1244 | struct rip_info *rinfo; | |
1245 | ||
1246 | rn = route_node_match_ipv4(rip->table, | |
1247 | &rte->nexthop); | |
1248 | ||
1249 | if (rn) { | |
1250 | rinfo = rn->info; | |
1251 | ||
1252 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1253 | && rinfo->sub_type | |
1254 | == RIP_ROUTE_RTE) { | |
1255 | if (IS_RIP_DEBUG_EVENT) | |
1256 | zlog_debug( | |
53bb7f9b MS |
1257 | "Next hop %pI4 is on RIP network. Set nexthop to the packet's originator", |
1258 | &rte->nexthop); | |
d62a17ae | 1259 | rte->nexthop = rinfo->from; |
1260 | } else { | |
1261 | if (IS_RIP_DEBUG_EVENT) | |
1262 | zlog_debug( | |
53bb7f9b MS |
1263 | "Next hop %pI4 is not directly reachable. Treat it as 0.0.0.0", |
1264 | &rte->nexthop); | |
975a328e DA |
1265 | rte->nexthop.s_addr = |
1266 | INADDR_ANY; | |
d62a17ae | 1267 | } |
1268 | ||
1269 | route_unlock_node(rn); | |
1270 | } else { | |
1271 | if (IS_RIP_DEBUG_EVENT) | |
1272 | zlog_debug( | |
53bb7f9b MS |
1273 | "Next hop %pI4 is not directly reachable. Treat it as 0.0.0.0", |
1274 | &rte->nexthop); | |
975a328e | 1275 | rte->nexthop.s_addr = INADDR_ANY; |
d62a17ae | 1276 | } |
1277 | } | |
1278 | } | |
718e3744 | 1279 | |
d62a17ae | 1280 | /* For RIPv1, there won't be a valid netmask. |
1281 | ||
1282 | This is a best guess at the masks. If everyone was using old | |
1283 | Ciscos before the 'ip subnet zero' option, it would be almost | |
1284 | right too :-) | |
1285 | ||
0437e105 | 1286 | Cisco summarize ripv1 advertisements to the classful boundary |
d62a17ae | 1287 | (/16 for class B's) except when the RIP packet does to inside |
1288 | the classful network in question. */ | |
1289 | ||
975a328e DA |
1290 | if ((packet->version == RIPv1 |
1291 | && rte->prefix.s_addr != INADDR_ANY) | |
d62a17ae | 1292 | || (packet->version == RIPv2 |
975a328e DA |
1293 | && (rte->prefix.s_addr != INADDR_ANY |
1294 | && rte->mask.s_addr == INADDR_ANY))) { | |
d7c0a89a | 1295 | uint32_t destination; |
d62a17ae | 1296 | |
1297 | if (subnetted == -1) { | |
1298 | memcpy(&ifaddr, ifc->address, | |
1299 | sizeof(struct prefix_ipv4)); | |
1300 | memcpy(&ifaddrclass, &ifaddr, | |
1301 | sizeof(struct prefix_ipv4)); | |
1302 | apply_classful_mask_ipv4(&ifaddrclass); | |
1303 | subnetted = 0; | |
1304 | if (ifaddr.prefixlen > ifaddrclass.prefixlen) | |
1305 | subnetted = 1; | |
1306 | } | |
1307 | ||
1308 | destination = ntohl(rte->prefix.s_addr); | |
1309 | ||
1310 | if (IN_CLASSA(destination)) | |
1311 | masklen2ip(8, &rte->mask); | |
1312 | else if (IN_CLASSB(destination)) | |
1313 | masklen2ip(16, &rte->mask); | |
1314 | else if (IN_CLASSC(destination)) | |
1315 | masklen2ip(24, &rte->mask); | |
1316 | ||
1317 | if (subnetted == 1) | |
1318 | masklen2ip(ifaddrclass.prefixlen, | |
1319 | (struct in_addr *)&destination); | |
1320 | if ((subnetted == 1) | |
1321 | && ((rte->prefix.s_addr & destination) | |
1322 | == ifaddrclass.prefix.s_addr)) { | |
1323 | masklen2ip(ifaddr.prefixlen, &rte->mask); | |
1324 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1325 | != rte->prefix.s_addr) | |
1326 | masklen2ip(32, &rte->mask); | |
1327 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
1328 | zlog_debug("Subnetted route %pI4", |
1329 | &rte->prefix); | |
d62a17ae | 1330 | } else { |
1331 | if ((rte->prefix.s_addr & rte->mask.s_addr) | |
1332 | != rte->prefix.s_addr) | |
1333 | continue; | |
1334 | } | |
1335 | ||
1336 | if (IS_RIP_DEBUG_EVENT) { | |
53bb7f9b MS |
1337 | zlog_debug("Resultant route %pI4", |
1338 | &rte->prefix); | |
1339 | zlog_debug("Resultant mask %pI4", | |
1340 | &rte->mask); | |
d62a17ae | 1341 | } |
1342 | } | |
1343 | ||
1344 | /* In case of RIPv2, if prefix in RTE is not netmask applied one | |
1345 | ignore the entry. */ | |
975a328e DA |
1346 | if ((packet->version == RIPv2) |
1347 | && (rte->mask.s_addr != INADDR_ANY) | |
d62a17ae | 1348 | && ((rte->prefix.s_addr & rte->mask.s_addr) |
1349 | != rte->prefix.s_addr)) { | |
1350 | zlog_warn( | |
53bb7f9b MS |
1351 | "RIPv2 address %pI4 is not mask /%d applied one", |
1352 | &rte->prefix, ip_masklen(rte->mask)); | |
045c5389 | 1353 | rip_peer_bad_route(rip, from); |
d62a17ae | 1354 | continue; |
1355 | } | |
1356 | ||
1357 | /* Default route's netmask is ignored. */ | |
975a328e DA |
1358 | if (packet->version == RIPv2 |
1359 | && (rte->prefix.s_addr == INADDR_ANY) | |
1360 | && (rte->mask.s_addr != INADDR_ANY)) { | |
d62a17ae | 1361 | if (IS_RIP_DEBUG_EVENT) |
1362 | zlog_debug( | |
1363 | "Default route with non-zero netmask. Set zero to netmask"); | |
975a328e | 1364 | rte->mask.s_addr = INADDR_ANY; |
d62a17ae | 1365 | } |
1366 | ||
1367 | /* Routing table updates. */ | |
1368 | rip_rte_process(rte, from, ifc->ifp); | |
718e3744 | 1369 | } |
718e3744 | 1370 | } |
1371 | ||
a4e987e0 | 1372 | /* Make socket for RIP protocol. */ |
ae7b826a | 1373 | int rip_create_socket(struct vrf *vrf) |
d62a17ae | 1374 | { |
1375 | int ret; | |
1376 | int sock; | |
1377 | struct sockaddr_in addr; | |
ae7b826a | 1378 | const char *vrf_dev = NULL; |
d62a17ae | 1379 | |
1380 | memset(&addr, 0, sizeof(struct sockaddr_in)); | |
1381 | addr.sin_family = AF_INET; | |
1382 | addr.sin_addr.s_addr = INADDR_ANY; | |
6f0e3f6e | 1383 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1384 | addr.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1385 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
d62a17ae | 1386 | /* sending port must always be the RIP port */ |
1387 | addr.sin_port = htons(RIP_PORT_DEFAULT); | |
1388 | ||
1389 | /* Make datagram socket. */ | |
ae7b826a RW |
1390 | if (vrf->vrf_id != VRF_DEFAULT) |
1391 | vrf_dev = vrf->name; | |
0cf6db21 | 1392 | frr_with_privs(&ripd_privs) { |
ae7b826a RW |
1393 | sock = vrf_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP, vrf->vrf_id, |
1394 | vrf_dev); | |
1395 | if (sock < 0) { | |
1396 | flog_err_sys(EC_LIB_SOCKET, | |
1397 | "Cannot create UDP socket: %s", | |
1398 | safe_strerror(errno)); | |
1399 | return -1; | |
1400 | } | |
d62a17ae | 1401 | } |
1402 | ||
1403 | sockopt_broadcast(sock); | |
1404 | sockopt_reuseaddr(sock); | |
1405 | sockopt_reuseport(sock); | |
1406 | setsockopt_ipv4_multicast_loop(sock, 0); | |
78b31d5c | 1407 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 1408 | setsockopt_ipv4_tos(sock, IPTOS_PREC_INTERNETCONTROL); |
78b31d5c | 1409 | #endif |
338b8e91 | 1410 | setsockopt_so_recvbuf(sock, RIP_UDP_RCV_BUF); |
a4e987e0 | 1411 | |
0cf6db21 | 1412 | frr_with_privs(&ripd_privs) { |
633fc9b1 DL |
1413 | if ((ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr))) |
1414 | < 0) { | |
53bb7f9b MS |
1415 | zlog_err("%s: Can't bind socket %d to %pI4 port %d: %s", |
1416 | __func__, sock, &addr.sin_addr, | |
633fc9b1 DL |
1417 | (int)ntohs(addr.sin_port), |
1418 | safe_strerror(errno)); | |
d62a17ae | 1419 | |
01b9e3fd DL |
1420 | close(sock); |
1421 | return ret; | |
1422 | } | |
01b9e3fd | 1423 | } |
d62a17ae | 1424 | |
1425 | return sock; | |
a4e987e0 | 1426 | } |
1427 | ||
c49ad8f1 | 1428 | /* RIP packet send to destination address, on interface denoted by |
1429 | * by connected argument. NULL to argument denotes destination should be | |
1430 | * should be RIP multicast group | |
1431 | */ | |
d7c0a89a | 1432 | static int rip_send_packet(uint8_t *buf, int size, struct sockaddr_in *to, |
d62a17ae | 1433 | struct connected *ifc) |
1434 | { | |
045c5389 RW |
1435 | struct rip_interface *ri; |
1436 | struct rip *rip; | |
d62a17ae | 1437 | int ret; |
1438 | struct sockaddr_in sin; | |
e35356af RW |
1439 | struct msghdr msg; |
1440 | struct iovec iov; | |
1441 | #ifdef GNU_LINUX | |
1442 | struct cmsghdr *cmsgptr; | |
1443 | char adata[256] = {}; | |
1444 | struct in_pktinfo *pkt; | |
1445 | #endif /* GNU_LINUX */ | |
d62a17ae | 1446 | |
1447 | assert(ifc != NULL); | |
045c5389 RW |
1448 | ri = ifc->ifp->info; |
1449 | rip = ri->rip; | |
d62a17ae | 1450 | |
1451 | if (IS_RIP_DEBUG_PACKET) { | |
f69bd9da | 1452 | #define ADDRESS_SIZE 20 |
d62a17ae | 1453 | char dst[ADDRESS_SIZE]; |
d62a17ae | 1454 | |
1455 | if (to) { | |
53bb7f9b | 1456 | inet_ntop(AF_INET, &to->sin_addr, dst, sizeof(dst)); |
d62a17ae | 1457 | } else { |
1458 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
53bb7f9b | 1459 | inet_ntop(AF_INET, &sin.sin_addr, dst, sizeof(dst)); |
d62a17ae | 1460 | } |
f69bd9da | 1461 | #undef ADDRESS_SIZE |
53bb7f9b MS |
1462 | zlog_debug("rip_send_packet %pI4 > %s (%s)", |
1463 | &ifc->address->u.prefix4, dst, | |
d62a17ae | 1464 | ifc->ifp->name); |
1465 | } | |
1466 | ||
1467 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) { | |
1468 | /* | |
1469 | * ZEBRA_IFA_SECONDARY is set on linux when an interface is | |
1470 | * configured | |
1471 | * with multiple addresses on the same subnet: the first address | |
1472 | * on the subnet is configured "primary", and all subsequent | |
1473 | * addresses | |
1474 | * on that subnet are treated as "secondary" addresses. | |
1475 | * In order to avoid routing-table bloat on other rip listeners, | |
1476 | * we do not send out RIP packets with ZEBRA_IFA_SECONDARY | |
1477 | * source addrs. | |
1478 | * XXX Since Linux is the only system for which the | |
1479 | * ZEBRA_IFA_SECONDARY | |
1480 | * flag is set, we would end up sending a packet for a | |
1481 | * "secondary" | |
1482 | * source address on non-linux systems. | |
1483 | */ | |
1484 | if (IS_RIP_DEBUG_PACKET) | |
1485 | zlog_debug("duplicate dropped"); | |
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | /* Make destination address. */ | |
1490 | memset(&sin, 0, sizeof(struct sockaddr_in)); | |
1491 | sin.sin_family = AF_INET; | |
6f0e3f6e | 1492 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1493 | sin.sin_len = sizeof(struct sockaddr_in); |
6f0e3f6e | 1494 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
718e3744 | 1495 | |
d62a17ae | 1496 | /* When destination is specified, use it's port and address. */ |
1497 | if (to) { | |
1498 | sin.sin_port = to->sin_port; | |
1499 | sin.sin_addr = to->sin_addr; | |
1500 | } else { | |
1501 | sin.sin_port = htons(RIP_PORT_DEFAULT); | |
1502 | sin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP); | |
ae735d2d | 1503 | |
d62a17ae | 1504 | rip_interface_multicast_set(rip->sock, ifc); |
1505 | } | |
718e3744 | 1506 | |
e35356af RW |
1507 | memset(&msg, 0, sizeof(msg)); |
1508 | msg.msg_name = (void *)&sin; | |
1509 | msg.msg_namelen = sizeof(struct sockaddr_in); | |
1510 | msg.msg_iov = &iov; | |
1511 | msg.msg_iovlen = 1; | |
1512 | iov.iov_base = buf; | |
1513 | iov.iov_len = size; | |
1514 | ||
1515 | #ifdef GNU_LINUX | |
1516 | msg.msg_control = (void *)adata; | |
1517 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in_pktinfo)); | |
1518 | ||
1519 | cmsgptr = (struct cmsghdr *)adata; | |
1520 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); | |
1521 | cmsgptr->cmsg_level = IPPROTO_IP; | |
1522 | cmsgptr->cmsg_type = IP_PKTINFO; | |
1523 | pkt = (struct in_pktinfo *)CMSG_DATA(cmsgptr); | |
1524 | pkt->ipi_ifindex = ifc->ifp->ifindex; | |
1525 | #endif /* GNU_LINUX */ | |
1526 | ||
1527 | ret = sendmsg(rip->sock, &msg, 0); | |
718e3744 | 1528 | |
d62a17ae | 1529 | if (IS_RIP_DEBUG_EVENT) |
53bb7f9b | 1530 | zlog_debug("SEND to %pI4%d", &sin.sin_addr, |
d62a17ae | 1531 | ntohs(sin.sin_port)); |
718e3744 | 1532 | |
d62a17ae | 1533 | if (ret < 0) |
1534 | zlog_warn("can't send packet : %s", safe_strerror(errno)); | |
718e3744 | 1535 | |
d62a17ae | 1536 | return ret; |
718e3744 | 1537 | } |
1538 | ||
1539 | /* Add redistributed route to RIP table. */ | |
045c5389 RW |
1540 | void rip_redistribute_add(struct rip *rip, int type, int sub_type, |
1541 | struct prefix_ipv4 *p, struct nexthop *nh, | |
1542 | unsigned int metric, unsigned char distance, | |
1543 | route_tag_t tag) | |
d62a17ae | 1544 | { |
1545 | int ret; | |
1546 | struct route_node *rp = NULL; | |
1547 | struct rip_info *rinfo = NULL, newinfo; | |
1548 | struct list *list = NULL; | |
1549 | ||
1550 | /* Redistribute route */ | |
1551 | ret = rip_destination_check(p->prefix); | |
1552 | if (!ret) | |
1553 | return; | |
1554 | ||
1555 | rp = route_node_get(rip->table, (struct prefix *)p); | |
1556 | ||
1557 | memset(&newinfo, 0, sizeof(struct rip_info)); | |
1558 | newinfo.type = type; | |
1559 | newinfo.sub_type = sub_type; | |
d62a17ae | 1560 | newinfo.metric = 1; |
1561 | newinfo.external_metric = metric; | |
1562 | newinfo.distance = distance; | |
1563 | if (tag <= UINT16_MAX) /* RIP only supports 16 bit tags */ | |
1564 | newinfo.tag = tag; | |
1565 | newinfo.rp = rp; | |
3f5682c8 | 1566 | newinfo.nh = *nh; |
d62a17ae | 1567 | |
1568 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
1569 | rinfo = listgetdata(listhead(list)); | |
1570 | ||
1571 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
1572 | && rinfo->sub_type == RIP_ROUTE_INTERFACE | |
1573 | && rinfo->metric != RIP_METRIC_INFINITY) { | |
1574 | route_unlock_node(rp); | |
1575 | return; | |
1576 | } | |
718e3744 | 1577 | |
d62a17ae | 1578 | /* Manually configured RIP route check. */ |
1579 | if (rinfo->type == ZEBRA_ROUTE_RIP | |
1580 | && ((rinfo->sub_type == RIP_ROUTE_STATIC) | |
1581 | || (rinfo->sub_type == RIP_ROUTE_DEFAULT))) { | |
1582 | if (type != ZEBRA_ROUTE_RIP | |
1583 | || ((sub_type != RIP_ROUTE_STATIC) | |
1584 | && (sub_type != RIP_ROUTE_DEFAULT))) { | |
1585 | route_unlock_node(rp); | |
1586 | return; | |
1587 | } | |
1588 | } | |
1589 | ||
045c5389 | 1590 | (void)rip_ecmp_replace(rip, &newinfo); |
d62a17ae | 1591 | route_unlock_node(rp); |
1592 | } else | |
045c5389 | 1593 | (void)rip_ecmp_add(rip, &newinfo); |
d62a17ae | 1594 | |
1595 | if (IS_RIP_DEBUG_EVENT) { | |
f42238f8 | 1596 | zlog_debug("Redistribute new prefix %pFX", p); |
718e3744 | 1597 | } |
1598 | ||
045c5389 | 1599 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
718e3744 | 1600 | } |
1601 | ||
1602 | /* Delete redistributed route from RIP table. */ | |
045c5389 RW |
1603 | void rip_redistribute_delete(struct rip *rip, int type, int sub_type, |
1604 | struct prefix_ipv4 *p, ifindex_t ifindex) | |
d62a17ae | 1605 | { |
1606 | int ret; | |
1607 | struct route_node *rp; | |
1608 | struct rip_info *rinfo; | |
1609 | ||
1610 | ret = rip_destination_check(p->prefix); | |
1611 | if (!ret) | |
1612 | return; | |
1613 | ||
1614 | rp = route_node_lookup(rip->table, (struct prefix *)p); | |
1615 | if (rp) { | |
1616 | struct list *list = rp->info; | |
1617 | ||
1618 | if (list != NULL && listcount(list) != 0) { | |
1619 | rinfo = listgetdata(listhead(list)); | |
1620 | if (rinfo != NULL && rinfo->type == type | |
1621 | && rinfo->sub_type == sub_type | |
dd127197 | 1622 | && rinfo->nh.ifindex == ifindex) { |
d62a17ae | 1623 | /* Perform poisoned reverse. */ |
1624 | rinfo->metric = RIP_METRIC_INFINITY; | |
1625 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
1626 | rip_garbage_collect, | |
1627 | rip->garbage_time); | |
1628 | RIP_TIMER_OFF(rinfo->t_timeout); | |
1629 | rinfo->flags |= RIP_RTF_CHANGED; | |
1630 | ||
1631 | if (IS_RIP_DEBUG_EVENT) | |
1632 | zlog_debug( | |
f42238f8 DS |
1633 | "Poison %pFX on the interface %s with an infinity metric [delete]", |
1634 | p, | |
ae7b826a RW |
1635 | ifindex2ifname( |
1636 | ifindex, | |
1637 | rip->vrf->vrf_id)); | |
d62a17ae | 1638 | |
045c5389 | 1639 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 1640 | } |
1641 | } | |
1642 | route_unlock_node(rp); | |
1643 | } | |
718e3744 | 1644 | } |
1645 | ||
1646 | /* Response to request called from rip_read ().*/ | |
d62a17ae | 1647 | static void rip_request_process(struct rip_packet *packet, int size, |
1648 | struct sockaddr_in *from, struct connected *ifc) | |
1649 | { | |
045c5389 | 1650 | struct rip *rip; |
d62a17ae | 1651 | caddr_t lim; |
1652 | struct rte *rte; | |
1653 | struct prefix_ipv4 p; | |
1654 | struct route_node *rp; | |
1655 | struct rip_info *rinfo; | |
1656 | struct rip_interface *ri; | |
1657 | ||
1658 | /* Does not reponse to the requests on the loopback interfaces */ | |
1659 | if (if_is_loopback(ifc->ifp)) | |
1660 | return; | |
1661 | ||
1662 | /* Check RIP process is enabled on this interface. */ | |
1663 | ri = ifc->ifp->info; | |
1664 | if (!ri->running) | |
1665 | return; | |
045c5389 | 1666 | rip = ri->rip; |
d62a17ae | 1667 | |
1668 | /* When passive interface is specified, suppress responses */ | |
1669 | if (ri->passive) | |
1670 | return; | |
1671 | ||
1672 | /* RIP peer update. */ | |
045c5389 | 1673 | rip_peer_update(rip, from, packet->version); |
d62a17ae | 1674 | |
1675 | lim = ((caddr_t)packet) + size; | |
1676 | rte = packet->rte; | |
1677 | ||
1678 | /* The Request is processed entry by entry. If there are no | |
1679 | entries, no response is given. */ | |
1680 | if (lim == (caddr_t)rte) | |
1681 | return; | |
1682 | ||
1683 | /* There is one special case. If there is exactly one entry in the | |
1684 | request, and it has an address family identifier of zero and a | |
1685 | metric of infinity (i.e., 16), then this is a request to send the | |
1686 | entire routing table. */ | |
1687 | if (lim == ((caddr_t)(rte + 1)) && ntohs(rte->family) == 0 | |
1688 | && ntohl(rte->metric) == RIP_METRIC_INFINITY) { | |
1689 | /* All route with split horizon */ | |
1690 | rip_output_process(ifc, from, rip_all_route, packet->version); | |
1691 | } else { | |
1692 | if (ntohs(rte->family) != AF_INET) | |
1693 | return; | |
1694 | ||
1695 | /* Examine the list of RTEs in the Request one by one. For each | |
1696 | entry, look up the destination in the router's routing | |
1697 | database and, if there is a route, put that route's metric in | |
1698 | the metric field of the RTE. If there is no explicit route | |
1699 | to the specified destination, put infinity in the metric | |
1700 | field. Once all the entries have been filled in, change the | |
1701 | command from Request to Response and send the datagram back | |
1702 | to the requestor. */ | |
1703 | p.family = AF_INET; | |
1704 | ||
1705 | for (; ((caddr_t)rte) < lim; rte++) { | |
1706 | p.prefix = rte->prefix; | |
1707 | p.prefixlen = ip_masklen(rte->mask); | |
1708 | apply_mask_ipv4(&p); | |
1709 | ||
1710 | rp = route_node_lookup(rip->table, (struct prefix *)&p); | |
1711 | if (rp) { | |
1712 | rinfo = listgetdata( | |
1713 | listhead((struct list *)rp->info)); | |
1714 | rte->metric = htonl(rinfo->metric); | |
1715 | route_unlock_node(rp); | |
1716 | } else | |
1717 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
1718 | } | |
1719 | packet->command = RIP_RESPONSE; | |
4e054866 | 1720 | |
b2608623 | 1721 | (void)rip_send_packet((uint8_t *)packet, size, from, ifc); |
d62a17ae | 1722 | } |
c08a2107 | 1723 | rip->counters.queries++; |
718e3744 | 1724 | } |
1725 | ||
718e3744 | 1726 | /* First entry point of RIP packet. */ |
d62a17ae | 1727 | static int rip_read(struct thread *t) |
1728 | { | |
045c5389 | 1729 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 1730 | int sock; |
1731 | int ret; | |
1732 | int rtenum; | |
1733 | union rip_buf rip_buf; | |
1734 | struct rip_packet *packet; | |
1735 | struct sockaddr_in from; | |
1736 | int len; | |
1737 | int vrecv; | |
1738 | socklen_t fromlen; | |
1739 | struct interface *ifp = NULL; | |
1740 | struct connected *ifc; | |
1741 | struct rip_interface *ri; | |
1742 | struct prefix p; | |
1743 | ||
1744 | /* Fetch socket then register myself. */ | |
1745 | sock = THREAD_FD(t); | |
d62a17ae | 1746 | |
1747 | /* Add myself to tne next event */ | |
045c5389 | 1748 | rip_event(rip, RIP_READ, sock); |
d62a17ae | 1749 | |
1750 | /* RIPd manages only IPv4. */ | |
1751 | memset(&from, 0, sizeof(struct sockaddr_in)); | |
1752 | fromlen = sizeof(struct sockaddr_in); | |
1753 | ||
1754 | len = recvfrom(sock, (char *)&rip_buf.buf, sizeof(rip_buf.buf), 0, | |
1755 | (struct sockaddr *)&from, &fromlen); | |
1756 | if (len < 0) { | |
ae7b826a RW |
1757 | zlog_info("recvfrom failed (VRF %s): %s", rip->vrf_name, |
1758 | safe_strerror(errno)); | |
d62a17ae | 1759 | return len; |
1760 | } | |
1761 | ||
1762 | /* Check is this packet comming from myself? */ | |
045c5389 | 1763 | if (if_check_address(rip, from.sin_addr)) { |
d62a17ae | 1764 | if (IS_RIP_DEBUG_PACKET) |
ae7b826a RW |
1765 | zlog_debug("ignore packet comes from myself (VRF %s)", |
1766 | rip->vrf_name); | |
d62a17ae | 1767 | return -1; |
1768 | } | |
1769 | ||
1770 | /* Which interface is this packet comes from. */ | |
ae7b826a RW |
1771 | ifc = if_lookup_address((void *)&from.sin_addr, AF_INET, |
1772 | rip->vrf->vrf_id); | |
d62a17ae | 1773 | if (ifc) |
1774 | ifp = ifc->ifp; | |
1775 | ||
1776 | /* RIP packet received */ | |
1777 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b MS |
1778 | zlog_debug("RECV packet from %pI4 port %d on %s (VRF %s)", |
1779 | &from.sin_addr, ntohs(from.sin_port), | |
ae7b826a | 1780 | ifp ? ifp->name : "unknown", rip->vrf_name); |
d62a17ae | 1781 | |
1782 | /* If this packet come from unknown interface, ignore it. */ | |
1783 | if (ifp == NULL) { | |
1784 | zlog_info( | |
53bb7f9b MS |
1785 | "rip_read: cannot find interface for packet from %pI4 port %d (VRF %s)", |
1786 | &from.sin_addr, ntohs(from.sin_port), | |
ae7b826a | 1787 | rip->vrf_name); |
d62a17ae | 1788 | return -1; |
1789 | } | |
1790 | ||
1791 | p.family = AF_INET; | |
1792 | p.u.prefix4 = from.sin_addr; | |
1793 | p.prefixlen = IPV4_MAX_BITLEN; | |
1794 | ||
1795 | ifc = connected_lookup_prefix(ifp, &p); | |
1796 | ||
1797 | if (ifc == NULL) { | |
1798 | zlog_info( | |
53bb7f9b MS |
1799 | "rip_read: cannot find connected address for packet from %pI4 port %d on interface %s (VRF %s)", |
1800 | &from.sin_addr, ntohs(from.sin_port), | |
ae7b826a | 1801 | ifp->name, rip->vrf_name); |
d62a17ae | 1802 | return -1; |
1803 | } | |
1804 | ||
1805 | /* Packet length check. */ | |
1806 | if (len < RIP_PACKET_MINSIZ) { | |
1807 | zlog_warn("packet size %d is smaller than minimum size %d", len, | |
1808 | RIP_PACKET_MINSIZ); | |
045c5389 | 1809 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1810 | return len; |
1811 | } | |
1812 | if (len > RIP_PACKET_MAXSIZ) { | |
1813 | zlog_warn("packet size %d is larger than max size %d", len, | |
1814 | RIP_PACKET_MAXSIZ); | |
045c5389 | 1815 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1816 | return len; |
1817 | } | |
1818 | ||
1819 | /* Packet alignment check. */ | |
1820 | if ((len - RIP_PACKET_MINSIZ) % 20) { | |
1821 | zlog_warn("packet size %d is wrong for RIP packet alignment", | |
1822 | len); | |
045c5389 | 1823 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1824 | return len; |
1825 | } | |
1826 | ||
1827 | /* Set RTE number. */ | |
1828 | rtenum = ((len - RIP_PACKET_MINSIZ) / 20); | |
1829 | ||
1830 | /* For easy to handle. */ | |
1831 | packet = &rip_buf.rip_packet; | |
1832 | ||
1833 | /* RIP version check. */ | |
1834 | if (packet->version == 0) { | |
1835 | zlog_info("version 0 with command %d received.", | |
1836 | packet->command); | |
045c5389 | 1837 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1838 | return -1; |
1839 | } | |
1840 | ||
1841 | /* Dump RIP packet. */ | |
1842 | if (IS_RIP_DEBUG_RECV) | |
1843 | rip_packet_dump(packet, len, "RECV"); | |
1844 | ||
1845 | /* RIP version adjust. This code should rethink now. RFC1058 says | |
1846 | that "Version 1 implementations are to ignore this extra data and | |
1847 | process only the fields specified in this document.". So RIPv3 | |
1848 | packet should be treated as RIPv1 ignoring must be zero field. */ | |
1849 | if (packet->version > RIPv2) | |
1850 | packet->version = RIPv2; | |
1851 | ||
1852 | /* Is RIP running or is this RIP neighbor ?*/ | |
1853 | ri = ifp->info; | |
045c5389 | 1854 | if (!ri->running && !rip_neighbor_lookup(rip, &from)) { |
d62a17ae | 1855 | if (IS_RIP_DEBUG_EVENT) |
1856 | zlog_debug("RIP is not enabled on interface %s.", | |
1857 | ifp->name); | |
045c5389 | 1858 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1859 | return -1; |
1860 | } | |
1861 | ||
1862 | /* RIP Version check. RFC2453, 4.6 and 5.1 */ | |
1863 | vrecv = ((ri->ri_receive == RI_RIP_UNSPEC) ? rip->version_recv | |
1864 | : ri->ri_receive); | |
1865 | if (vrecv == RI_RIP_VERSION_NONE | |
1866 | || ((packet->version == RIPv1) && !(vrecv & RIPv1)) | |
1867 | || ((packet->version == RIPv2) && !(vrecv & RIPv2))) { | |
1868 | if (IS_RIP_DEBUG_PACKET) | |
1869 | zlog_debug( | |
1870 | " packet's v%d doesn't fit to if version spec", | |
1871 | packet->version); | |
045c5389 | 1872 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1873 | return -1; |
1874 | } | |
1875 | ||
1876 | /* RFC2453 5.2 If the router is not configured to authenticate RIP-2 | |
1877 | messages, then RIP-1 and unauthenticated RIP-2 messages will be | |
1878 | accepted; authenticated RIP-2 messages shall be discarded. */ | |
1879 | if ((ri->auth_type == RIP_NO_AUTH) && rtenum | |
1880 | && (packet->version == RIPv2) | |
1881 | && (packet->rte->family == htons(RIP_FAMILY_AUTH))) { | |
1882 | if (IS_RIP_DEBUG_EVENT) | |
1883 | zlog_debug( | |
1884 | "packet RIPv%d is dropped because authentication disabled", | |
1885 | packet->version); | |
fe339c95 | 1886 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1887 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1888 | return -1; |
1889 | } | |
1890 | ||
1891 | /* RFC: | |
1892 | If the router is configured to authenticate RIP-2 messages, then | |
1893 | RIP-1 messages and RIP-2 messages which pass authentication | |
1894 | testing shall be accepted; unauthenticated and failed | |
1895 | authentication RIP-2 messages shall be discarded. For maximum | |
1896 | security, RIP-1 messages should be ignored when authentication is | |
1897 | in use (see section 4.1); otherwise, the routing information from | |
1898 | authenticated messages will be propagated by RIP-1 routers in an | |
1899 | unauthenticated manner. | |
1900 | */ | |
1901 | /* We make an exception for RIPv1 REQUEST packets, to which we'll | |
1902 | * always reply regardless of authentication settings, because: | |
1903 | * | |
1904 | * - if there other authorised routers on-link, the REQUESTor can | |
1905 | * passively obtain the routing updates anyway | |
1906 | * - if there are no other authorised routers on-link, RIP can | |
1907 | * easily be disabled for the link to prevent giving out information | |
1908 | * on state of this routers RIP routing table.. | |
1909 | * | |
1910 | * I.e. if RIPv1 has any place anymore these days, it's as a very | |
1911 | * simple way to distribute routing information (e.g. to embedded | |
1912 | * hosts / appliances) and the ability to give out RIPv1 | |
1913 | * routing-information freely, while still requiring RIPv2 | |
1914 | * authentication for any RESPONSEs might be vaguely useful. | |
1915 | */ | |
1916 | if (ri->auth_type != RIP_NO_AUTH && packet->version == RIPv1) { | |
1917 | /* Discard RIPv1 messages other than REQUESTs */ | |
1918 | if (packet->command != RIP_REQUEST) { | |
1919 | if (IS_RIP_DEBUG_PACKET) | |
1920 | zlog_debug( | |
3efd0893 | 1921 | "RIPv1 dropped because authentication enabled"); |
fe339c95 | 1922 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1923 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1924 | return -1; |
1925 | } | |
1926 | } else if (ri->auth_type != RIP_NO_AUTH) { | |
1927 | const char *auth_desc; | |
1928 | ||
1929 | if (rtenum == 0) { | |
1930 | /* There definitely is no authentication in the packet. | |
1931 | */ | |
1932 | if (IS_RIP_DEBUG_PACKET) | |
1933 | zlog_debug( | |
1934 | "RIPv2 authentication failed: no auth RTE in packet"); | |
fe339c95 | 1935 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1936 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1937 | return -1; |
1938 | } | |
1939 | ||
1940 | /* First RTE must be an Authentication Family RTE */ | |
1941 | if (packet->rte->family != htons(RIP_FAMILY_AUTH)) { | |
1942 | if (IS_RIP_DEBUG_PACKET) | |
1943 | zlog_debug( | |
3efd0893 | 1944 | "RIPv2 dropped because authentication enabled"); |
fe339c95 | 1945 | ripd_notif_send_auth_type_failure(ifp->name); |
045c5389 | 1946 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1947 | return -1; |
1948 | } | |
1949 | ||
1950 | /* Check RIPv2 authentication. */ | |
1951 | switch (ntohs(packet->rte->tag)) { | |
1952 | case RIP_AUTH_SIMPLE_PASSWORD: | |
1953 | auth_desc = "simple"; | |
1954 | ret = rip_auth_simple_password(packet->rte, &from, ifp); | |
1955 | break; | |
1956 | ||
1957 | case RIP_AUTH_MD5: | |
1958 | auth_desc = "MD5"; | |
1959 | ret = rip_auth_md5(packet, &from, len, ifp); | |
1960 | /* Reset RIP packet length to trim MD5 data. */ | |
1961 | len = ret; | |
1962 | break; | |
1963 | ||
1964 | default: | |
1965 | ret = 0; | |
1966 | auth_desc = "unknown type"; | |
1967 | if (IS_RIP_DEBUG_PACKET) | |
1968 | zlog_debug( | |
1969 | "RIPv2 Unknown authentication type %d", | |
1970 | ntohs(packet->rte->tag)); | |
1971 | } | |
1972 | ||
1973 | if (ret) { | |
1974 | if (IS_RIP_DEBUG_PACKET) | |
1975 | zlog_debug("RIPv2 %s authentication success", | |
1976 | auth_desc); | |
1977 | } else { | |
1978 | if (IS_RIP_DEBUG_PACKET) | |
1979 | zlog_debug("RIPv2 %s authentication failure", | |
1980 | auth_desc); | |
fe339c95 | 1981 | ripd_notif_send_auth_failure(ifp->name); |
045c5389 | 1982 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 1983 | return -1; |
1984 | } | |
1985 | } | |
1986 | ||
1987 | /* Process each command. */ | |
1988 | switch (packet->command) { | |
1989 | case RIP_RESPONSE: | |
1990 | rip_response_process(packet, len, &from, ifc); | |
1991 | break; | |
1992 | case RIP_REQUEST: | |
1993 | case RIP_POLL: | |
1994 | rip_request_process(packet, len, &from, ifc); | |
1995 | break; | |
1996 | case RIP_TRACEON: | |
1997 | case RIP_TRACEOFF: | |
1998 | zlog_info( | |
1999 | "Obsolete command %s received, please sent it to routed", | |
2000 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 2001 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 2002 | break; |
2003 | case RIP_POLL_ENTRY: | |
2004 | zlog_info("Obsolete command %s received", | |
2005 | lookup_msg(rip_msg, packet->command, NULL)); | |
045c5389 | 2006 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 2007 | break; |
2008 | default: | |
2009 | zlog_info("Unknown RIP command %d received", packet->command); | |
045c5389 | 2010 | rip_peer_bad_packet(rip, &from); |
d62a17ae | 2011 | break; |
2012 | } | |
2013 | ||
2014 | return len; | |
718e3744 | 2015 | } |
2016 | ||
718e3744 | 2017 | /* Write routing table entry to the stream and return next index of |
2018 | the routing table entry in the stream. */ | |
d62a17ae | 2019 | static int rip_write_rte(int num, struct stream *s, struct prefix_ipv4 *p, |
d7c0a89a | 2020 | uint8_t version, struct rip_info *rinfo) |
d62a17ae | 2021 | { |
2022 | struct in_addr mask; | |
2023 | ||
2024 | /* Write routing table entry. */ | |
2025 | if (version == RIPv1) { | |
2026 | stream_putw(s, AF_INET); | |
2027 | stream_putw(s, 0); | |
2028 | stream_put_ipv4(s, p->prefix.s_addr); | |
2029 | stream_put_ipv4(s, 0); | |
2030 | stream_put_ipv4(s, 0); | |
2031 | stream_putl(s, rinfo->metric_out); | |
2032 | } else { | |
2033 | masklen2ip(p->prefixlen, &mask); | |
2034 | ||
2035 | stream_putw(s, AF_INET); | |
2036 | stream_putw(s, rinfo->tag_out); | |
2037 | stream_put_ipv4(s, p->prefix.s_addr); | |
2038 | stream_put_ipv4(s, mask.s_addr); | |
2039 | stream_put_ipv4(s, rinfo->nexthop_out.s_addr); | |
2040 | stream_putl(s, rinfo->metric_out); | |
2041 | } | |
2042 | ||
2043 | return ++num; | |
718e3744 | 2044 | } |
2045 | ||
2046 | /* Send update to the ifp or spcified neighbor. */ | |
d62a17ae | 2047 | void rip_output_process(struct connected *ifc, struct sockaddr_in *to, |
d7c0a89a | 2048 | int route_type, uint8_t version) |
d62a17ae | 2049 | { |
045c5389 | 2050 | struct rip *rip; |
d62a17ae | 2051 | int ret; |
2052 | struct stream *s; | |
2053 | struct route_node *rp; | |
2054 | struct rip_info *rinfo; | |
2055 | struct rip_interface *ri; | |
2056 | struct prefix_ipv4 *p; | |
2057 | struct prefix_ipv4 classfull; | |
2058 | struct prefix_ipv4 ifaddrclass; | |
2059 | struct key *key = NULL; | |
2060 | /* this might need to made dynamic if RIP ever supported auth methods | |
2061 | with larger key string sizes */ | |
2062 | char auth_str[RIP_AUTH_SIMPLE_SIZE]; | |
2063 | size_t doff = 0; /* offset of digest offset field */ | |
2064 | int num = 0; | |
2065 | int rtemax; | |
2066 | int subnetted = 0; | |
2067 | struct list *list = NULL; | |
2068 | struct listnode *listnode = NULL; | |
2069 | ||
2070 | /* Logging output event. */ | |
2071 | if (IS_RIP_DEBUG_EVENT) { | |
2072 | if (to) | |
53bb7f9b MS |
2073 | zlog_debug("update routes to neighbor %pI4", |
2074 | &to->sin_addr); | |
d62a17ae | 2075 | else |
2076 | zlog_debug("update routes on interface %s ifindex %d", | |
2077 | ifc->ifp->name, ifc->ifp->ifindex); | |
2078 | } | |
718e3744 | 2079 | |
045c5389 RW |
2080 | /* Get RIP interface. */ |
2081 | ri = ifc->ifp->info; | |
2082 | rip = ri->rip; | |
2083 | ||
d62a17ae | 2084 | /* Set output stream. */ |
2085 | s = rip->obuf; | |
2086 | ||
2087 | /* Reset stream and RTE counter. */ | |
2088 | stream_reset(s); | |
2089 | rtemax = RIP_MAX_RTE; | |
2090 | ||
d62a17ae | 2091 | /* If output interface is in simple password authentication mode, we |
2092 | need space for authentication data. */ | |
2093 | if (ri->auth_type == RIP_AUTH_SIMPLE_PASSWORD) | |
2094 | rtemax -= 1; | |
2095 | ||
2096 | /* If output interface is in MD5 authentication mode, we need space | |
2097 | for authentication header and data. */ | |
2098 | if (ri->auth_type == RIP_AUTH_MD5) | |
2099 | rtemax -= 2; | |
2100 | ||
2101 | /* If output interface is in simple password authentication mode | |
2102 | and string or keychain is specified we need space for auth. data */ | |
2103 | if (ri->auth_type != RIP_NO_AUTH) { | |
2104 | if (ri->key_chain) { | |
2105 | struct keychain *keychain; | |
2106 | ||
2107 | keychain = keychain_lookup(ri->key_chain); | |
2108 | if (keychain) | |
2109 | key = key_lookup_for_send(keychain); | |
2110 | } | |
2111 | /* to be passed to auth functions later */ | |
5c84f238 | 2112 | rip_auth_prepare_str_send(ri, key, auth_str, sizeof(auth_str)); |
558c6842 | 2113 | if (strlen(auth_str) == 0) |
2114 | return; | |
d62a17ae | 2115 | } |
2116 | ||
2117 | if (version == RIPv1) { | |
2118 | memcpy(&ifaddrclass, ifc->address, sizeof(struct prefix_ipv4)); | |
2119 | apply_classful_mask_ipv4(&ifaddrclass); | |
2120 | subnetted = 0; | |
2121 | if (ifc->address->prefixlen > ifaddrclass.prefixlen) | |
2122 | subnetted = 1; | |
2123 | } | |
2124 | ||
2125 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) | |
2126 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
2127 | rinfo = listgetdata(listhead(list)); | |
2128 | /* For RIPv1, if we are subnetted, output subnets in our | |
2129 | * network */ | |
2130 | /* that have the same mask as the output "interface". | |
2131 | * For other */ | |
2132 | /* networks, only the classfull version is output. */ | |
2133 | ||
2134 | if (version == RIPv1) { | |
2135 | p = (struct prefix_ipv4 *)&rp->p; | |
2136 | ||
2137 | if (IS_RIP_DEBUG_PACKET) | |
2138 | zlog_debug( | |
53bb7f9b MS |
2139 | "RIPv1 mask check, %pFX considered for output", |
2140 | &rp->p); | |
d62a17ae | 2141 | |
2142 | if (subnetted | |
2143 | && prefix_match( | |
2144 | (struct prefix *)&ifaddrclass, | |
2145 | &rp->p)) { | |
2146 | if ((ifc->address->prefixlen | |
2147 | != rp->p.prefixlen) | |
12256b84 DA |
2148 | && (rp->p.prefixlen |
2149 | != IPV4_MAX_BITLEN)) | |
d62a17ae | 2150 | continue; |
2151 | } else { | |
2152 | memcpy(&classfull, &rp->p, | |
2153 | sizeof(struct prefix_ipv4)); | |
2154 | apply_classful_mask_ipv4(&classfull); | |
3a6290bd | 2155 | if (rp->p.u.prefix4.s_addr != INADDR_ANY |
d62a17ae | 2156 | && classfull.prefixlen |
2157 | != rp->p.prefixlen) | |
2158 | continue; | |
2159 | } | |
2160 | if (IS_RIP_DEBUG_PACKET) | |
2161 | zlog_debug( | |
53bb7f9b MS |
2162 | "RIPv1 mask check, %pFX made it through", |
2163 | &rp->p); | |
d62a17ae | 2164 | } else |
2165 | p = (struct prefix_ipv4 *)&rp->p; | |
2166 | ||
2167 | /* Apply output filters. */ | |
2168 | ret = rip_filter(RIP_FILTER_OUT, p, ri); | |
2169 | if (ret < 0) | |
2170 | continue; | |
2171 | ||
2172 | /* Changed route only output. */ | |
2173 | if (route_type == rip_changed_route | |
2174 | && (!(rinfo->flags & RIP_RTF_CHANGED))) | |
2175 | continue; | |
2176 | ||
2177 | /* Split horizon. */ | |
2178 | /* if (split_horizon == rip_split_horizon) */ | |
2179 | if (ri->split_horizon == RIP_SPLIT_HORIZON) { | |
2180 | /* | |
2181 | * We perform split horizon for RIP and | |
2182 | * connected route. | |
2183 | * For rip routes, we want to suppress the route | |
2184 | * if we would | |
2185 | * end up sending the route back on the | |
2186 | * interface that we | |
2187 | * learned it from, with a higher metric. For | |
2188 | * connected routes, | |
2189 | * we suppress the route if the prefix is a | |
2190 | * subset of the | |
2191 | * source address that we are going to use for | |
2192 | * the packet | |
2193 | * (in order to handle the case when multiple | |
2194 | * subnets are | |
2195 | * configured on the same interface). | |
2196 | */ | |
2197 | int suppress = 0; | |
2198 | struct rip_info *tmp_rinfo = NULL; | |
9920df07 | 2199 | struct connected *tmp_ifc = NULL; |
d62a17ae | 2200 | |
2201 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
2202 | tmp_rinfo)) | |
2203 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP | |
dd127197 | 2204 | && tmp_rinfo->nh.ifindex |
d62a17ae | 2205 | == ifc->ifp->ifindex) { |
2206 | suppress = 1; | |
2207 | break; | |
2208 | } | |
2209 | ||
2210 | if (!suppress | |
9920df07 | 2211 | && rinfo->type == ZEBRA_ROUTE_CONNECT) { |
2212 | for (ALL_LIST_ELEMENTS_RO( | |
2213 | ifc->ifp->connected, | |
2214 | listnode, tmp_ifc)) | |
2215 | if (prefix_match( | |
2216 | (struct prefix *)p, | |
2217 | tmp_ifc->address)) { | |
2218 | suppress = 1; | |
2219 | break; | |
2220 | } | |
2221 | } | |
d62a17ae | 2222 | |
2223 | if (suppress) | |
2224 | continue; | |
2225 | } | |
2226 | ||
2227 | /* Preparation for route-map. */ | |
2228 | rinfo->metric_set = 0; | |
2229 | rinfo->nexthop_out.s_addr = 0; | |
2230 | rinfo->metric_out = rinfo->metric; | |
2231 | rinfo->tag_out = rinfo->tag; | |
2232 | rinfo->ifindex_out = ifc->ifp->ifindex; | |
2233 | ||
2234 | /* In order to avoid some local loops, | |
2235 | * if the RIP route has a nexthop via this interface, | |
2236 | * keep the nexthop, | |
2237 | * otherwise set it to 0. The nexthop should not be | |
2238 | * propagated | |
2239 | * beyond the local broadcast/multicast area in order | |
2240 | * to avoid an IGP multi-level recursive look-up. | |
2241 | * see (4.4) | |
2242 | */ | |
dd127197 DS |
2243 | if (rinfo->nh.ifindex == ifc->ifp->ifindex) |
2244 | rinfo->nexthop_out = rinfo->nh.gate.ipv4; | |
d62a17ae | 2245 | |
2246 | /* Interface route-map */ | |
2247 | if (ri->routemap[RIP_FILTER_OUT]) { | |
2248 | ret = route_map_apply( | |
2249 | ri->routemap[RIP_FILTER_OUT], | |
1782514f | 2250 | (struct prefix *)p, rinfo); |
d62a17ae | 2251 | |
2252 | if (ret == RMAP_DENYMATCH) { | |
2253 | if (IS_RIP_DEBUG_PACKET) | |
2254 | zlog_debug( | |
f42238f8 DS |
2255 | "RIP %pFX is filtered by route-map out", |
2256 | p); | |
d62a17ae | 2257 | continue; |
2258 | } | |
2259 | } | |
2260 | ||
2261 | /* Apply redistribute route map - continue, if deny */ | |
f9120f71 | 2262 | if (rip->redist[rinfo->type].route_map.name |
d62a17ae | 2263 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) { |
2264 | ret = route_map_apply( | |
f9120f71 | 2265 | rip->redist[rinfo->type].route_map.map, |
1782514f | 2266 | (struct prefix *)p, rinfo); |
d62a17ae | 2267 | |
2268 | if (ret == RMAP_DENYMATCH) { | |
2269 | if (IS_RIP_DEBUG_PACKET) | |
2270 | zlog_debug( | |
f42238f8 DS |
2271 | "%pFX is filtered by route-map", |
2272 | p); | |
d62a17ae | 2273 | continue; |
2274 | } | |
2275 | } | |
2276 | ||
2277 | /* When route-map does not set metric. */ | |
2278 | if (!rinfo->metric_set) { | |
2279 | /* If redistribute metric is set. */ | |
f9120f71 | 2280 | if (rip->redist[rinfo->type].metric_config |
d62a17ae | 2281 | && rinfo->metric != RIP_METRIC_INFINITY) { |
2282 | rinfo->metric_out = | |
f9120f71 | 2283 | rip->redist[rinfo->type].metric; |
d62a17ae | 2284 | } else { |
2285 | /* If the route is not connected or | |
2286 | localy generated | |
2287 | one, use default-metric value*/ | |
2288 | if (rinfo->type != ZEBRA_ROUTE_RIP | |
2289 | && rinfo->type | |
2290 | != ZEBRA_ROUTE_CONNECT | |
2291 | && rinfo->metric | |
2292 | != RIP_METRIC_INFINITY) | |
2293 | rinfo->metric_out = | |
2294 | rip->default_metric; | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | /* Apply offset-list */ | |
2299 | if (rinfo->metric != RIP_METRIC_INFINITY) | |
2300 | rip_offset_list_apply_out(p, ifc->ifp, | |
2301 | &rinfo->metric_out); | |
2302 | ||
2303 | if (rinfo->metric_out > RIP_METRIC_INFINITY) | |
2304 | rinfo->metric_out = RIP_METRIC_INFINITY; | |
2305 | ||
2306 | /* Perform split-horizon with poisoned reverse | |
2307 | * for RIP and connected routes. | |
2308 | **/ | |
2309 | if (ri->split_horizon | |
2310 | == RIP_SPLIT_HORIZON_POISONED_REVERSE) { | |
2311 | /* | |
2312 | * We perform split horizon for RIP and | |
2313 | * connected route. | |
2314 | * For rip routes, we want to suppress the route | |
2315 | * if we would | |
2316 | * end up sending the route back on the | |
2317 | * interface that we | |
2318 | * learned it from, with a higher metric. For | |
2319 | * connected routes, | |
2320 | * we suppress the route if the prefix is a | |
2321 | * subset of the | |
2322 | * source address that we are going to use for | |
2323 | * the packet | |
2324 | * (in order to handle the case when multiple | |
2325 | * subnets are | |
2326 | * configured on the same interface). | |
2327 | */ | |
2328 | struct rip_info *tmp_rinfo = NULL; | |
9920df07 | 2329 | struct connected *tmp_ifc = NULL; |
d62a17ae | 2330 | |
2331 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
2332 | tmp_rinfo)) | |
2333 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIP | |
dd127197 | 2334 | && tmp_rinfo->nh.ifindex |
996c9314 | 2335 | == ifc->ifp->ifindex) |
9920df07 | 2336 | rinfo->metric_out = |
d62a17ae | 2337 | RIP_METRIC_INFINITY; |
aea175a8 | 2338 | |
9920df07 | 2339 | if (rinfo->metric_out != RIP_METRIC_INFINITY |
2340 | && rinfo->type == ZEBRA_ROUTE_CONNECT) { | |
2341 | for (ALL_LIST_ELEMENTS_RO( | |
2342 | ifc->ifp->connected, | |
2343 | listnode, tmp_ifc)) | |
2344 | if (prefix_match( | |
2345 | (struct prefix *)p, | |
2346 | tmp_ifc->address)) { | |
2347 | rinfo->metric_out = | |
2348 | RIP_METRIC_INFINITY; | |
2349 | break; | |
2350 | } | |
2351 | } | |
d62a17ae | 2352 | } |
2353 | ||
2354 | /* Prepare preamble, auth headers, if needs be */ | |
2355 | if (num == 0) { | |
2356 | stream_putc(s, RIP_RESPONSE); | |
2357 | stream_putc(s, version); | |
2358 | stream_putw(s, 0); | |
2359 | ||
2360 | /* auth header for !v1 && !no_auth */ | |
2361 | if ((ri->auth_type != RIP_NO_AUTH) | |
2362 | && (version != RIPv1)) | |
2363 | doff = rip_auth_header_write( | |
2364 | s, ri, key, auth_str, | |
2365 | RIP_AUTH_SIMPLE_SIZE); | |
2366 | } | |
2367 | ||
2368 | /* Write RTE to the stream. */ | |
2369 | num = rip_write_rte(num, s, p, version, rinfo); | |
2370 | if (num == rtemax) { | |
2371 | if (version == RIPv2 | |
2372 | && ri->auth_type == RIP_AUTH_MD5) | |
2373 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2374 | RIP_AUTH_SIMPLE_SIZE); | |
2375 | ||
2376 | ret = rip_send_packet(STREAM_DATA(s), | |
2377 | stream_get_endp(s), to, | |
2378 | ifc); | |
2379 | ||
2380 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2381 | rip_packet_dump((struct rip_packet *) | |
2382 | STREAM_DATA(s), | |
2383 | stream_get_endp(s), | |
2384 | "SEND"); | |
2385 | num = 0; | |
2386 | stream_reset(s); | |
2387 | } | |
2388 | } | |
2389 | ||
2390 | /* Flush unwritten RTE. */ | |
2391 | if (num != 0) { | |
2392 | if (version == RIPv2 && ri->auth_type == RIP_AUTH_MD5) | |
2393 | rip_auth_md5_set(s, ri, doff, auth_str, | |
2394 | RIP_AUTH_SIMPLE_SIZE); | |
2395 | ||
2396 | ret = rip_send_packet(STREAM_DATA(s), stream_get_endp(s), to, | |
2397 | ifc); | |
2398 | ||
2399 | if (ret >= 0 && IS_RIP_DEBUG_SEND) | |
2400 | rip_packet_dump((struct rip_packet *)STREAM_DATA(s), | |
2401 | stream_get_endp(s), "SEND"); | |
2402 | stream_reset(s); | |
2403 | } | |
2404 | ||
2405 | /* Statistics updates. */ | |
2406 | ri->sent_updates++; | |
718e3744 | 2407 | } |
2408 | ||
2409 | /* Send RIP packet to the interface. */ | |
d7c0a89a | 2410 | static void rip_update_interface(struct connected *ifc, uint8_t version, |
d62a17ae | 2411 | int route_type) |
2412 | { | |
2413 | struct interface *ifp = ifc->ifp; | |
2414 | struct rip_interface *ri = ifp->info; | |
2415 | struct sockaddr_in to; | |
2416 | ||
2417 | /* When RIP version is 2 and multicast enable interface. */ | |
2418 | if (version == RIPv2 && !ri->v2_broadcast && if_is_multicast(ifp)) { | |
2419 | if (IS_RIP_DEBUG_EVENT) | |
2420 | zlog_debug("multicast announce on %s ", ifp->name); | |
2421 | ||
2422 | rip_output_process(ifc, NULL, route_type, version); | |
2423 | return; | |
2424 | } | |
2425 | ||
2426 | /* If we can't send multicast packet, send it with unicast. */ | |
2427 | if (if_is_broadcast(ifp) || if_is_pointopoint(ifp)) { | |
2428 | if (ifc->address->family == AF_INET) { | |
2429 | /* Destination address and port setting. */ | |
2430 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2431 | if (ifc->destination) | |
2432 | /* use specified broadcast or peer destination | |
2433 | * addr */ | |
2434 | to.sin_addr = ifc->destination->u.prefix4; | |
936fbaef | 2435 | else if (ifc->address->prefixlen < IPV4_MAX_BITLEN) |
d62a17ae | 2436 | /* calculate the appropriate broadcast address |
2437 | */ | |
2438 | to.sin_addr.s_addr = ipv4_broadcast_addr( | |
2439 | ifc->address->u.prefix4.s_addr, | |
2440 | ifc->address->prefixlen); | |
2441 | else | |
2442 | /* do not know where to send the packet */ | |
2443 | return; | |
2444 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2445 | ||
2446 | if (IS_RIP_DEBUG_EVENT) | |
53bb7f9b | 2447 | zlog_debug("%s announce to %pI4 on %s", |
d62a17ae | 2448 | CONNECTED_PEER(ifc) ? "unicast" |
2449 | : "broadcast", | |
53bb7f9b | 2450 | &to.sin_addr, ifp->name); |
d62a17ae | 2451 | |
2452 | rip_output_process(ifc, &to, route_type, version); | |
2453 | } | |
2454 | } | |
718e3744 | 2455 | } |
2456 | ||
2457 | /* Update send to all interface and neighbor. */ | |
045c5389 | 2458 | static void rip_update_process(struct rip *rip, int route_type) |
d62a17ae | 2459 | { |
d62a17ae | 2460 | struct listnode *ifnode, *ifnnode; |
2461 | struct connected *connected; | |
2462 | struct interface *ifp; | |
2463 | struct rip_interface *ri; | |
2464 | struct route_node *rp; | |
2465 | struct sockaddr_in to; | |
2466 | struct prefix *p; | |
2467 | ||
2468 | /* Send RIP update to each interface. */ | |
ae7b826a | 2469 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 2470 | if (if_is_loopback(ifp)) |
2471 | continue; | |
2472 | ||
2473 | if (!if_is_operative(ifp)) | |
2474 | continue; | |
2475 | ||
2476 | /* Fetch RIP interface information. */ | |
2477 | ri = ifp->info; | |
2478 | ||
2479 | /* When passive interface is specified, suppress announce to the | |
2480 | interface. */ | |
2481 | if (ri->passive) | |
2482 | continue; | |
2483 | ||
2484 | if (ri->running) { | |
2485 | /* | |
2486 | * If there is no version configuration in the | |
2487 | * interface, | |
2488 | * use rip's version setting. | |
2489 | */ | |
2490 | int vsend = ((ri->ri_send == RI_RIP_UNSPEC) | |
2491 | ? rip->version_send | |
2492 | : ri->ri_send); | |
2493 | ||
2494 | if (IS_RIP_DEBUG_EVENT) | |
2495 | zlog_debug("SEND UPDATE to %s ifindex %d", | |
2496 | ifp->name, ifp->ifindex); | |
2497 | ||
2498 | /* send update on each connected network */ | |
2499 | for (ALL_LIST_ELEMENTS(ifp->connected, ifnode, ifnnode, | |
2500 | connected)) { | |
2501 | if (connected->address->family == AF_INET) { | |
2502 | if (vsend & RIPv1) | |
2503 | rip_update_interface( | |
2504 | connected, RIPv1, | |
2505 | route_type); | |
2506 | if ((vsend & RIPv2) | |
2507 | && if_is_multicast(ifp)) | |
2508 | rip_update_interface( | |
2509 | connected, RIPv2, | |
2510 | route_type); | |
2511 | } | |
2512 | } | |
2513 | } | |
2514 | } | |
2515 | ||
2516 | /* RIP send updates to each neighbor. */ | |
2517 | for (rp = route_top(rip->neighbor); rp; rp = route_next(rp)) | |
2518 | if (rp->info != NULL) { | |
2519 | p = &rp->p; | |
2520 | ||
2521 | connected = if_lookup_address(&p->u.prefix4, AF_INET, | |
ae7b826a | 2522 | rip->vrf->vrf_id); |
d62a17ae | 2523 | if (!connected) { |
2524 | zlog_warn( | |
53bb7f9b MS |
2525 | "Neighbor %pI4 doesn't have connected interface!", |
2526 | &p->u.prefix4); | |
d62a17ae | 2527 | continue; |
2528 | } | |
2529 | ||
2530 | /* Set destination address and port */ | |
2531 | memset(&to, 0, sizeof(struct sockaddr_in)); | |
2532 | to.sin_addr = p->u.prefix4; | |
2533 | to.sin_port = htons(RIP_PORT_DEFAULT); | |
2534 | ||
2535 | /* RIP version is rip's configuration. */ | |
2536 | rip_output_process(connected, &to, route_type, | |
2537 | rip->version_send); | |
b9d92881 | 2538 | } |
718e3744 | 2539 | } |
2540 | ||
2541 | /* RIP's periodical timer. */ | |
d62a17ae | 2542 | static int rip_update(struct thread *t) |
718e3744 | 2543 | { |
045c5389 RW |
2544 | struct rip *rip = THREAD_ARG(t); |
2545 | ||
d62a17ae | 2546 | if (IS_RIP_DEBUG_EVENT) |
2547 | zlog_debug("update timer fire!"); | |
718e3744 | 2548 | |
d62a17ae | 2549 | /* Process update output. */ |
045c5389 | 2550 | rip_update_process(rip, rip_all_route); |
718e3744 | 2551 | |
d62a17ae | 2552 | /* Triggered updates may be suppressed if a regular update is due by |
2553 | the time the triggered update would be sent. */ | |
2554 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
2555 | rip->trigger = 0; | |
718e3744 | 2556 | |
d62a17ae | 2557 | /* Register myself. */ |
045c5389 | 2558 | rip_event(rip, RIP_UPDATE_EVENT, 0); |
718e3744 | 2559 | |
d62a17ae | 2560 | return 0; |
718e3744 | 2561 | } |
2562 | ||
2563 | /* Walk down the RIP routing table then clear changed flag. */ | |
045c5389 | 2564 | static void rip_clear_changed_flag(struct rip *rip) |
718e3744 | 2565 | { |
d62a17ae | 2566 | struct route_node *rp; |
2567 | struct rip_info *rinfo = NULL; | |
2568 | struct list *list = NULL; | |
2569 | struct listnode *listnode = NULL; | |
718e3744 | 2570 | |
d62a17ae | 2571 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2572 | if ((list = rp->info) != NULL) | |
2573 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
2574 | UNSET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2575 | /* This flag can be set only on the first entry. | |
2576 | */ | |
2577 | break; | |
2578 | } | |
718e3744 | 2579 | } |
2580 | ||
2581 | /* Triggered update interval timer. */ | |
d62a17ae | 2582 | static int rip_triggered_interval(struct thread *t) |
718e3744 | 2583 | { |
045c5389 | 2584 | struct rip *rip = THREAD_ARG(t); |
718e3744 | 2585 | |
d62a17ae | 2586 | if (rip->trigger) { |
2587 | rip->trigger = 0; | |
2588 | rip_triggered_update(t); | |
2589 | } | |
2590 | return 0; | |
2591 | } | |
718e3744 | 2592 | |
2593 | /* Execute triggered update. */ | |
d62a17ae | 2594 | static int rip_triggered_update(struct thread *t) |
718e3744 | 2595 | { |
045c5389 | 2596 | struct rip *rip = THREAD_ARG(t); |
d62a17ae | 2597 | int interval; |
718e3744 | 2598 | |
d62a17ae | 2599 | /* Cancel interval timer. */ |
2600 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
2601 | rip->trigger = 0; | |
718e3744 | 2602 | |
d62a17ae | 2603 | /* Logging triggered update. */ |
2604 | if (IS_RIP_DEBUG_EVENT) | |
2605 | zlog_debug("triggered update!"); | |
718e3744 | 2606 | |
d62a17ae | 2607 | /* Split Horizon processing is done when generating triggered |
2608 | updates as well as normal updates (see section 2.6). */ | |
045c5389 | 2609 | rip_update_process(rip, rip_changed_route); |
718e3744 | 2610 | |
d62a17ae | 2611 | /* Once all of the triggered updates have been generated, the route |
2612 | change flags should be cleared. */ | |
045c5389 | 2613 | rip_clear_changed_flag(rip); |
718e3744 | 2614 | |
d62a17ae | 2615 | /* After a triggered update is sent, a timer should be set for a |
2616 | random interval between 1 and 5 seconds. If other changes that | |
2617 | would trigger updates occur before the timer expires, a single | |
2618 | update is triggered when the timer expires. */ | |
5920b3eb | 2619 | interval = (frr_weak_random() % 5) + 1; |
718e3744 | 2620 | |
045c5389 | 2621 | thread_add_timer(master, rip_triggered_interval, rip, interval, |
d62a17ae | 2622 | &rip->t_triggered_interval); |
718e3744 | 2623 | |
d62a17ae | 2624 | return 0; |
718e3744 | 2625 | } |
2626 | ||
2627 | /* Withdraw redistributed route. */ | |
045c5389 | 2628 | void rip_redistribute_withdraw(struct rip *rip, int type) |
d62a17ae | 2629 | { |
2630 | struct route_node *rp; | |
2631 | struct rip_info *rinfo = NULL; | |
2632 | struct list *list = NULL; | |
2633 | ||
d62a17ae | 2634 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2635 | if ((list = rp->info) != NULL) { | |
2636 | rinfo = listgetdata(listhead(list)); | |
2637 | if (rinfo->type == type | |
2638 | && rinfo->sub_type != RIP_ROUTE_INTERFACE) { | |
2639 | /* Perform poisoned reverse. */ | |
2640 | rinfo->metric = RIP_METRIC_INFINITY; | |
2641 | RIP_TIMER_ON(rinfo->t_garbage_collect, | |
2642 | rip_garbage_collect, | |
2643 | rip->garbage_time); | |
2644 | RIP_TIMER_OFF(rinfo->t_timeout); | |
2645 | rinfo->flags |= RIP_RTF_CHANGED; | |
2646 | ||
2647 | if (IS_RIP_DEBUG_EVENT) { | |
2648 | struct prefix_ipv4 *p = | |
2649 | (struct prefix_ipv4 *)&rp->p; | |
2650 | ||
2651 | zlog_debug( | |
f42238f8 DS |
2652 | "Poisone %pFX on the interface %s with an infinity metric [withdraw]", |
2653 | p, | |
dd127197 DS |
2654 | ifindex2ifname( |
2655 | rinfo->nh.ifindex, | |
ae7b826a | 2656 | rip->vrf->vrf_id)); |
d62a17ae | 2657 | } |
2658 | ||
045c5389 | 2659 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 2660 | } |
2661 | } | |
2662 | } | |
2663 | ||
045c5389 RW |
2664 | struct rip *rip_lookup_by_vrf_id(vrf_id_t vrf_id) |
2665 | { | |
2666 | struct vrf *vrf; | |
2667 | ||
2668 | vrf = vrf_lookup_by_id(vrf_id); | |
2669 | if (!vrf) | |
2670 | return NULL; | |
2671 | ||
2672 | return vrf->info; | |
2673 | } | |
2674 | ||
ae7b826a RW |
2675 | struct rip *rip_lookup_by_vrf_name(const char *vrf_name) |
2676 | { | |
2677 | struct rip rip; | |
2678 | ||
2679 | rip.vrf_name = (char *)vrf_name; | |
2680 | ||
2681 | return RB_FIND(rip_instance_head, &rip_instances, &rip); | |
2682 | } | |
2683 | ||
d62a17ae | 2684 | /* Create new RIP instance and set it to global variable. */ |
ae7b826a | 2685 | struct rip *rip_create(const char *vrf_name, struct vrf *vrf, int socket) |
718e3744 | 2686 | { |
045c5389 | 2687 | struct rip *rip; |
045c5389 | 2688 | |
d62a17ae | 2689 | rip = XCALLOC(MTYPE_RIP, sizeof(struct rip)); |
ae7b826a | 2690 | rip->vrf_name = XSTRDUP(MTYPE_RIP_VRF_NAME, vrf_name); |
718e3744 | 2691 | |
d62a17ae | 2692 | /* Set initial value. */ |
8c9226c2 RW |
2693 | rip->ecmp = yang_get_default_bool("%s/allow-ecmp", RIP_INSTANCE); |
2694 | rip->default_metric = | |
2695 | yang_get_default_uint8("%s/default-metric", RIP_INSTANCE); | |
2696 | rip->distance = | |
2697 | yang_get_default_uint8("%s/distance/default", RIP_INSTANCE); | |
44f2f852 RW |
2698 | rip->passive_default = |
2699 | yang_get_default_bool("%s/passive-default", RIP_INSTANCE); | |
8c9226c2 RW |
2700 | rip->garbage_time = yang_get_default_uint32("%s/timers/flush-interval", |
2701 | RIP_INSTANCE); | |
2702 | rip->timeout_time = yang_get_default_uint32( | |
2703 | "%s/timers/holddown-interval", RIP_INSTANCE); | |
2704 | rip->update_time = yang_get_default_uint32("%s/timers/update-interval", | |
2705 | RIP_INSTANCE); | |
2706 | rip->version_send = | |
2707 | yang_get_default_enum("%s/version/send", RIP_INSTANCE); | |
2708 | rip->version_recv = | |
2709 | yang_get_default_enum("%s/version/receive", RIP_INSTANCE); | |
718e3744 | 2710 | |
ca046902 | 2711 | /* Initialize RIP data structures. */ |
d62a17ae | 2712 | rip->table = route_table_init(); |
045c5389 | 2713 | route_table_set_info(rip->table, rip); |
d62a17ae | 2714 | rip->neighbor = route_table_init(); |
29e897ad RW |
2715 | rip->peer_list = list_new(); |
2716 | rip->peer_list->cmp = (int (*)(void *, void *))rip_peer_list_cmp; | |
711915d2 | 2717 | rip->peer_list->del = rip_peer_list_del; |
2826309c RW |
2718 | rip->distance_table = route_table_init(); |
2719 | rip->distance_table->cleanup = rip_distance_table_node_cleanup; | |
ca046902 | 2720 | rip->enable_interface = vector_init(1); |
1205fdc4 | 2721 | rip->enable_network = route_table_init(); |
5a29c0d5 | 2722 | rip->passive_nondefault = vector_init(1); |
3f21c8c4 RW |
2723 | rip->offset_list_master = list_new(); |
2724 | rip->offset_list_master->cmp = (int (*)(void *, void *))offset_list_cmp; | |
6c4c3561 | 2725 | rip->offset_list_master->del = (void (*)(void *))offset_list_free; |
718e3744 | 2726 | |
2d2eaa13 | 2727 | /* Distribute list install. */ |
ae7b826a | 2728 | rip->distribute_ctx = distribute_list_ctx_create(vrf); |
2d2eaa13 RW |
2729 | distribute_list_add_hook(rip->distribute_ctx, rip_distribute_update); |
2730 | distribute_list_delete_hook(rip->distribute_ctx, rip_distribute_update); | |
2731 | ||
4b23867c | 2732 | /* if rmap install. */ |
8f88441d | 2733 | rip->if_rmap_ctx = if_rmap_ctx_create(vrf_name); |
4b23867c PG |
2734 | if_rmap_hook_add(rip->if_rmap_ctx, rip_if_rmap_update); |
2735 | if_rmap_hook_delete(rip->if_rmap_ctx, rip_if_rmap_update); | |
2736 | ||
d62a17ae | 2737 | /* Make output stream. */ |
2738 | rip->obuf = stream_new(1500); | |
16705130 | 2739 | |
ae7b826a RW |
2740 | /* Enable the routing instance if possible. */ |
2741 | if (vrf && vrf_is_enabled(vrf)) | |
2742 | rip_instance_enable(rip, vrf, socket); | |
2743 | else { | |
2744 | rip->vrf = NULL; | |
2745 | rip->sock = -1; | |
045c5389 RW |
2746 | } |
2747 | ||
ae7b826a RW |
2748 | RB_INSERT(rip_instance_head, &rip_instances, rip); |
2749 | ||
045c5389 | 2750 | return rip; |
d62a17ae | 2751 | } |
718e3744 | 2752 | |
d62a17ae | 2753 | /* Sned RIP request to the destination. */ |
2754 | int rip_request_send(struct sockaddr_in *to, struct interface *ifp, | |
d7c0a89a | 2755 | uint8_t version, struct connected *connected) |
d62a17ae | 2756 | { |
2757 | struct rte *rte; | |
2758 | struct rip_packet rip_packet; | |
2759 | struct listnode *node, *nnode; | |
2760 | ||
2761 | memset(&rip_packet, 0, sizeof(rip_packet)); | |
2762 | ||
2763 | rip_packet.command = RIP_REQUEST; | |
2764 | rip_packet.version = version; | |
2765 | rte = rip_packet.rte; | |
2766 | rte->metric = htonl(RIP_METRIC_INFINITY); | |
2767 | ||
2768 | if (connected) { | |
2769 | /* | |
2770 | * connected is only sent for ripv1 case, or when | |
2771 | * interface does not support multicast. Caller loops | |
2772 | * over each connected address for this case. | |
2773 | */ | |
d7c0a89a | 2774 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2775 | to, connected) |
2776 | != sizeof(rip_packet)) | |
2777 | return -1; | |
2778 | else | |
2779 | return sizeof(rip_packet); | |
2780 | } | |
718e3744 | 2781 | |
d62a17ae | 2782 | /* send request on each connected network */ |
2783 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, connected)) { | |
2784 | struct prefix_ipv4 *p; | |
718e3744 | 2785 | |
d62a17ae | 2786 | p = (struct prefix_ipv4 *)connected->address; |
718e3744 | 2787 | |
d62a17ae | 2788 | if (p->family != AF_INET) |
2789 | continue; | |
f6eacff4 | 2790 | |
d7c0a89a | 2791 | if (rip_send_packet((uint8_t *)&rip_packet, sizeof(rip_packet), |
d62a17ae | 2792 | to, connected) |
2793 | != sizeof(rip_packet)) | |
2794 | return -1; | |
2795 | } | |
2796 | return sizeof(rip_packet); | |
718e3744 | 2797 | } |
2798 | ||
d62a17ae | 2799 | static int rip_update_jitter(unsigned long time) |
718e3744 | 2800 | { |
239389ba | 2801 | #define JITTER_BOUND 4 |
d62a17ae | 2802 | /* We want to get the jitter to +/- 1/JITTER_BOUND the interval. |
2803 | Given that, we cannot let time be less than JITTER_BOUND seconds. | |
2804 | The RIPv2 RFC says jitter should be small compared to | |
2805 | update_time. We consider 1/JITTER_BOUND to be small. | |
2806 | */ | |
2807 | ||
2808 | int jitter_input = time; | |
2809 | int jitter; | |
2810 | ||
2811 | if (jitter_input < JITTER_BOUND) | |
2812 | jitter_input = JITTER_BOUND; | |
2813 | ||
5920b3eb RZ |
2814 | jitter = (((frr_weak_random() % ((jitter_input * 2) + 1)) |
2815 | - jitter_input)); | |
d62a17ae | 2816 | |
2817 | return jitter / JITTER_BOUND; | |
2818 | } | |
2819 | ||
045c5389 | 2820 | void rip_event(struct rip *rip, enum rip_event event, int sock) |
d62a17ae | 2821 | { |
2822 | int jitter = 0; | |
2823 | ||
2824 | switch (event) { | |
2825 | case RIP_READ: | |
045c5389 | 2826 | thread_add_read(master, rip_read, rip, sock, &rip->t_read); |
d62a17ae | 2827 | break; |
2828 | case RIP_UPDATE_EVENT: | |
2829 | RIP_TIMER_OFF(rip->t_update); | |
2830 | jitter = rip_update_jitter(rip->update_time); | |
045c5389 | 2831 | thread_add_timer(master, rip_update, rip, |
d62a17ae | 2832 | sock ? 2 : rip->update_time + jitter, |
2833 | &rip->t_update); | |
2834 | break; | |
2835 | case RIP_TRIGGERED_UPDATE: | |
2836 | if (rip->t_triggered_interval) | |
2837 | rip->trigger = 1; | |
2838 | else | |
045c5389 | 2839 | thread_add_event(master, rip_triggered_update, rip, 0, |
d62a17ae | 2840 | &rip->t_triggered_update); |
2841 | break; | |
2842 | default: | |
2843 | break; | |
2844 | } | |
718e3744 | 2845 | } |
6b0655a2 | 2846 | |
23b23d8c | 2847 | struct rip_distance *rip_distance_new(void) |
718e3744 | 2848 | { |
d62a17ae | 2849 | return XCALLOC(MTYPE_RIP_DISTANCE, sizeof(struct rip_distance)); |
718e3744 | 2850 | } |
2851 | ||
23b23d8c | 2852 | void rip_distance_free(struct rip_distance *rdistance) |
d62a17ae | 2853 | { |
2826309c RW |
2854 | if (rdistance->access_list) |
2855 | free(rdistance->access_list); | |
d62a17ae | 2856 | XFREE(MTYPE_RIP_DISTANCE, rdistance); |
718e3744 | 2857 | } |
2858 | ||
2826309c RW |
2859 | static void rip_distance_table_node_cleanup(struct route_table *table, |
2860 | struct route_node *node) | |
d62a17ae | 2861 | { |
d62a17ae | 2862 | struct rip_distance *rdistance; |
718e3744 | 2863 | |
2826309c RW |
2864 | rdistance = node->info; |
2865 | if (rdistance) | |
2866 | rip_distance_free(rdistance); | |
d62a17ae | 2867 | } |
2868 | ||
2869 | /* Apply RIP information to distance method. */ | |
045c5389 | 2870 | uint8_t rip_distance_apply(struct rip *rip, struct rip_info *rinfo) |
d62a17ae | 2871 | { |
2872 | struct route_node *rn; | |
2873 | struct prefix_ipv4 p; | |
2874 | struct rip_distance *rdistance; | |
2875 | struct access_list *alist; | |
2876 | ||
d62a17ae | 2877 | memset(&p, 0, sizeof(struct prefix_ipv4)); |
2878 | p.family = AF_INET; | |
2879 | p.prefix = rinfo->from; | |
2880 | p.prefixlen = IPV4_MAX_BITLEN; | |
2881 | ||
2882 | /* Check source address. */ | |
2826309c | 2883 | rn = route_node_match(rip->distance_table, (struct prefix *)&p); |
d62a17ae | 2884 | if (rn) { |
2885 | rdistance = rn->info; | |
2886 | route_unlock_node(rn); | |
2887 | ||
2888 | if (rdistance->access_list) { | |
2889 | alist = access_list_lookup(AFI_IP, | |
2890 | rdistance->access_list); | |
2891 | if (alist == NULL) | |
2892 | return 0; | |
2893 | if (access_list_apply(alist, &rinfo->rp->p) | |
2894 | == FILTER_DENY) | |
2895 | return 0; | |
2896 | ||
2897 | return rdistance->distance; | |
2898 | } else | |
2899 | return rdistance->distance; | |
718e3744 | 2900 | } |
718e3744 | 2901 | |
d62a17ae | 2902 | if (rip->distance) |
2903 | return rip->distance; | |
718e3744 | 2904 | |
d62a17ae | 2905 | return 0; |
718e3744 | 2906 | } |
2907 | ||
045c5389 | 2908 | static void rip_distance_show(struct vty *vty, struct rip *rip) |
d62a17ae | 2909 | { |
2910 | struct route_node *rn; | |
2911 | struct rip_distance *rdistance; | |
2912 | int header = 1; | |
2913 | char buf[BUFSIZ]; | |
2914 | ||
7f8a9cba | 2915 | vty_out(vty, " Distance: (default is %u)\n", |
d62a17ae | 2916 | rip->distance ? rip->distance : ZEBRA_RIP_DISTANCE_DEFAULT); |
2917 | ||
2826309c | 2918 | for (rn = route_top(rip->distance_table); rn; rn = route_next(rn)) |
d62a17ae | 2919 | if ((rdistance = rn->info) != NULL) { |
2920 | if (header) { | |
2921 | vty_out(vty, | |
2922 | " Address Distance List\n"); | |
2923 | header = 0; | |
2924 | } | |
53bb7f9b | 2925 | snprintfrr(buf, sizeof(buf), "%pFX", &rn->p); |
d62a17ae | 2926 | vty_out(vty, " %-20s %4d %s\n", buf, |
2927 | rdistance->distance, | |
2928 | rdistance->access_list ? rdistance->access_list | |
2929 | : ""); | |
2930 | } | |
718e3744 | 2931 | } |
2932 | ||
8478ae7e | 2933 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
045c5389 | 2934 | void rip_ecmp_disable(struct rip *rip) |
d62a17ae | 2935 | { |
2936 | struct route_node *rp; | |
2937 | struct rip_info *rinfo, *tmp_rinfo; | |
2938 | struct list *list; | |
2939 | struct listnode *node, *nextnode; | |
2940 | ||
d62a17ae | 2941 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) |
2942 | if ((list = rp->info) != NULL && listcount(list) > 1) { | |
2943 | rinfo = listgetdata(listhead(list)); | |
2944 | if (!rip_route_rte(rinfo)) | |
2945 | continue; | |
2946 | ||
2947 | /* Drop all other entries, except the first one. */ | |
2948 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
2949 | if (tmp_rinfo != rinfo) { | |
2950 | RIP_TIMER_OFF(tmp_rinfo->t_timeout); | |
2951 | RIP_TIMER_OFF( | |
2952 | tmp_rinfo->t_garbage_collect); | |
2953 | list_delete_node(list, node); | |
2954 | rip_info_free(tmp_rinfo); | |
2955 | } | |
2956 | ||
2957 | /* Update zebra. */ | |
045c5389 | 2958 | rip_zebra_ipv4_add(rip, rp); |
d62a17ae | 2959 | |
2960 | /* Set the route change flag. */ | |
2961 | SET_FLAG(rinfo->flags, RIP_RTF_CHANGED); | |
2962 | ||
2963 | /* Signal the output process to trigger an update. */ | |
045c5389 | 2964 | rip_event(rip, RIP_TRIGGERED_UPDATE, 0); |
d62a17ae | 2965 | } |
8478ae7e LF |
2966 | } |
2967 | ||
718e3744 | 2968 | /* Print out routes update time. */ |
d62a17ae | 2969 | static void rip_vty_out_uptime(struct vty *vty, struct rip_info *rinfo) |
718e3744 | 2970 | { |
d62a17ae | 2971 | time_t clock; |
a2700b50 | 2972 | struct tm tm; |
718e3744 | 2973 | #define TIME_BUF 25 |
d62a17ae | 2974 | char timebuf[TIME_BUF]; |
2975 | struct thread *thread; | |
2976 | ||
2977 | if ((thread = rinfo->t_timeout) != NULL) { | |
2978 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
2979 | gmtime_r(&clock, &tm); |
2980 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 2981 | vty_out(vty, "%5s", timebuf); |
2982 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
2983 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
2984 | gmtime_r(&clock, &tm); |
2985 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 2986 | vty_out(vty, "%5s", timebuf); |
2987 | } | |
2988 | } | |
2989 | ||
2990 | static const char *rip_route_type_print(int sub_type) | |
2991 | { | |
2992 | switch (sub_type) { | |
2993 | case RIP_ROUTE_RTE: | |
2994 | return "n"; | |
2995 | case RIP_ROUTE_STATIC: | |
2996 | return "s"; | |
2997 | case RIP_ROUTE_DEFAULT: | |
2998 | return "d"; | |
2999 | case RIP_ROUTE_REDISTRIBUTE: | |
3000 | return "r"; | |
3001 | case RIP_ROUTE_INTERFACE: | |
3002 | return "i"; | |
3003 | default: | |
3004 | return "?"; | |
3005 | } | |
718e3744 | 3006 | } |
3007 | ||
3008 | DEFUN (show_ip_rip, | |
3009 | show_ip_rip_cmd, | |
ae7b826a | 3010 | "show ip rip [vrf NAME]", |
718e3744 | 3011 | SHOW_STR |
3012 | IP_STR | |
ae7b826a RW |
3013 | "Show RIP routes\n" |
3014 | VRF_CMD_HELP_STR) | |
718e3744 | 3015 | { |
045c5389 | 3016 | struct rip *rip; |
d62a17ae | 3017 | struct route_node *np; |
3018 | struct rip_info *rinfo = NULL; | |
3019 | struct list *list = NULL; | |
3020 | struct listnode *listnode = NULL; | |
ae7b826a RW |
3021 | const char *vrf_name; |
3022 | int idx = 0; | |
d62a17ae | 3023 | |
ae7b826a RW |
3024 | if (argv_find(argv, argc, "vrf", &idx)) |
3025 | vrf_name = argv[idx + 1]->arg; | |
3026 | else | |
3027 | vrf_name = VRF_DEFAULT_NAME; | |
3028 | ||
3029 | rip = rip_lookup_by_vrf_name(vrf_name); | |
3030 | if (!rip) { | |
3031 | vty_out(vty, "%% RIP instance not found\n"); | |
3032 | return CMD_SUCCESS; | |
3033 | } | |
3034 | if (!rip->enabled) { | |
3035 | vty_out(vty, "%% RIP instance is disabled\n"); | |
d62a17ae | 3036 | return CMD_SUCCESS; |
ae7b826a | 3037 | } |
d62a17ae | 3038 | |
3039 | vty_out(vty, | |
3040 | "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP\n" | |
3041 | "Sub-codes:\n" | |
3042 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
3043 | " (i) - interface\n\n" | |
3044 | " Network Next Hop Metric From Tag Time\n"); | |
3045 | ||
3046 | for (np = route_top(rip->table); np; np = route_next(np)) | |
3047 | if ((list = np->info) != NULL) | |
3048 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
3049 | int len; | |
3050 | ||
3051 | len = vty_out( | |
53bb7f9b | 3052 | vty, "%c(%s) %pFX", |
d62a17ae | 3053 | /* np->lock, For debugging. */ |
3054 | zebra_route_char(rinfo->type), | |
3055 | rip_route_type_print(rinfo->sub_type), | |
53bb7f9b | 3056 | &np->p); |
d62a17ae | 3057 | |
3058 | len = 24 - len; | |
3059 | ||
3060 | if (len > 0) | |
3061 | vty_out(vty, "%*s", len, " "); | |
3062 | ||
996c9314 | 3063 | switch (rinfo->nh.type) { |
3f5682c8 DS |
3064 | case NEXTHOP_TYPE_IPV4: |
3065 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
53bb7f9b MS |
3066 | vty_out(vty, "%-20pI4 %2d ", |
3067 | &rinfo->nh.gate.ipv4, | |
d62a17ae | 3068 | rinfo->metric); |
3f5682c8 DS |
3069 | break; |
3070 | case NEXTHOP_TYPE_IFINDEX: | |
d62a17ae | 3071 | vty_out(vty, |
3072 | "0.0.0.0 %2d ", | |
3073 | rinfo->metric); | |
3f5682c8 DS |
3074 | break; |
3075 | case NEXTHOP_TYPE_BLACKHOLE: | |
3076 | vty_out(vty, | |
3077 | "blackhole %2d ", | |
3078 | rinfo->metric); | |
3079 | break; | |
3080 | case NEXTHOP_TYPE_IPV6: | |
3081 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
3082 | vty_out(vty, | |
3083 | "V6 Address Hidden %2d ", | |
3084 | rinfo->metric); | |
3085 | break; | |
3086 | } | |
d62a17ae | 3087 | |
3088 | /* Route which exist in kernel routing table. */ | |
3089 | if ((rinfo->type == ZEBRA_ROUTE_RIP) | |
3090 | && (rinfo->sub_type == RIP_ROUTE_RTE)) { | |
53bb7f9b MS |
3091 | vty_out(vty, "%-15pI4 ", |
3092 | &rinfo->from); | |
d62a17ae | 3093 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", |
3094 | (route_tag_t)rinfo->tag); | |
3095 | rip_vty_out_uptime(vty, rinfo); | |
3096 | } else if (rinfo->metric | |
3097 | == RIP_METRIC_INFINITY) { | |
3098 | vty_out(vty, "self "); | |
3099 | vty_out(vty, "%3" ROUTE_TAG_PRI " ", | |
3100 | (route_tag_t)rinfo->tag); | |
3101 | rip_vty_out_uptime(vty, rinfo); | |
3102 | } else { | |
3103 | if (rinfo->external_metric) { | |
3104 | len = vty_out( | |
3105 | vty, "self (%s:%d)", | |
3106 | zebra_route_string( | |
3107 | rinfo->type), | |
3108 | rinfo->external_metric); | |
3109 | len = 16 - len; | |
3110 | if (len > 0) | |
3111 | vty_out(vty, "%*s", len, | |
3112 | " "); | |
3113 | } else | |
3114 | vty_out(vty, | |
3115 | "self "); | |
3116 | vty_out(vty, "%3" ROUTE_TAG_PRI, | |
3117 | (route_tag_t)rinfo->tag); | |
3118 | } | |
3119 | ||
3120 | vty_out(vty, "\n"); | |
3121 | } | |
3122 | return CMD_SUCCESS; | |
718e3744 | 3123 | } |
3124 | ||
16705130 | 3125 | /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */ |
3126 | DEFUN (show_ip_rip_status, | |
3127 | show_ip_rip_status_cmd, | |
ae7b826a | 3128 | "show ip rip [vrf NAME] status", |
718e3744 | 3129 | SHOW_STR |
3130 | IP_STR | |
16705130 | 3131 | "Show RIP routes\n" |
ae7b826a | 3132 | VRF_CMD_HELP_STR |
718e3744 | 3133 | "IP routing protocol process parameters and statistics\n") |
3134 | { | |
045c5389 | 3135 | struct rip *rip; |
d62a17ae | 3136 | struct interface *ifp; |
3137 | struct rip_interface *ri; | |
3138 | extern const struct message ri_version_msg[]; | |
3139 | const char *send_version; | |
3140 | const char *receive_version; | |
ae7b826a RW |
3141 | const char *vrf_name; |
3142 | int idx = 0; | |
d62a17ae | 3143 | |
ae7b826a RW |
3144 | if (argv_find(argv, argc, "vrf", &idx)) |
3145 | vrf_name = argv[idx + 1]->arg; | |
3146 | else | |
3147 | vrf_name = VRF_DEFAULT_NAME; | |
3148 | ||
3149 | rip = rip_lookup_by_vrf_name(vrf_name); | |
3150 | if (!rip) { | |
3151 | vty_out(vty, "%% RIP instance not found\n"); | |
d62a17ae | 3152 | return CMD_SUCCESS; |
ae7b826a RW |
3153 | } |
3154 | if (!rip->enabled) { | |
3155 | vty_out(vty, "%% RIP instance is disabled\n"); | |
3156 | return CMD_SUCCESS; | |
3157 | } | |
d62a17ae | 3158 | |
3159 | vty_out(vty, "Routing Protocol is \"rip\"\n"); | |
b745780b | 3160 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 3161 | rip->update_time); |
3162 | vty_out(vty, " next due in %lu seconds\n", | |
3163 | thread_timer_remain_second(rip->t_update)); | |
b745780b RW |
3164 | vty_out(vty, " Timeout after %u seconds,", rip->timeout_time); |
3165 | vty_out(vty, " garbage collect after %u seconds\n", rip->garbage_time); | |
d62a17ae | 3166 | |
3167 | /* Filtering status show. */ | |
03a38493 | 3168 | config_show_distribute(vty, rip->distribute_ctx); |
d62a17ae | 3169 | |
3170 | /* Default metric information. */ | |
282ae30c | 3171 | vty_out(vty, " Default redistribution metric is %u\n", |
d62a17ae | 3172 | rip->default_metric); |
3173 | ||
3174 | /* Redistribute information. */ | |
3175 | vty_out(vty, " Redistributing:"); | |
045c5389 | 3176 | rip_show_redistribute_config(vty, rip); |
d62a17ae | 3177 | vty_out(vty, "\n"); |
3178 | ||
3179 | vty_out(vty, " Default version control: send version %s,", | |
3180 | lookup_msg(ri_version_msg, rip->version_send, NULL)); | |
3181 | if (rip->version_recv == RI_RIP_VERSION_1_AND_2) | |
3182 | vty_out(vty, " receive any version \n"); | |
3183 | else | |
3184 | vty_out(vty, " receive version %s \n", | |
3185 | lookup_msg(ri_version_msg, rip->version_recv, NULL)); | |
3186 | ||
3187 | vty_out(vty, " Interface Send Recv Key-chain\n"); | |
3188 | ||
ae7b826a | 3189 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 3190 | ri = ifp->info; |
3191 | ||
3192 | if (!ri->running) | |
3193 | continue; | |
3194 | ||
3195 | if (ri->enable_network || ri->enable_interface) { | |
3196 | if (ri->ri_send == RI_RIP_UNSPEC) | |
3197 | send_version = | |
3198 | lookup_msg(ri_version_msg, | |
3199 | rip->version_send, NULL); | |
3200 | else | |
3201 | send_version = lookup_msg(ri_version_msg, | |
3202 | ri->ri_send, NULL); | |
3203 | ||
3204 | if (ri->ri_receive == RI_RIP_UNSPEC) | |
3205 | receive_version = | |
3206 | lookup_msg(ri_version_msg, | |
3207 | rip->version_recv, NULL); | |
3208 | else | |
3209 | receive_version = lookup_msg( | |
3210 | ri_version_msg, ri->ri_receive, NULL); | |
3211 | ||
3212 | vty_out(vty, " %-17s%-3s %-3s %s\n", ifp->name, | |
3213 | send_version, receive_version, | |
3214 | ri->key_chain ? ri->key_chain : ""); | |
3215 | } | |
3216 | } | |
718e3744 | 3217 | |
d62a17ae | 3218 | vty_out(vty, " Routing for Networks:\n"); |
045c5389 | 3219 | rip_show_network_config(vty, rip); |
718e3744 | 3220 | |
718e3744 | 3221 | { |
d62a17ae | 3222 | int found_passive = 0; |
ae7b826a | 3223 | FOR_ALL_INTERFACES (rip->vrf, ifp) { |
d62a17ae | 3224 | ri = ifp->info; |
3225 | ||
3226 | if ((ri->enable_network || ri->enable_interface) | |
3227 | && ri->passive) { | |
3228 | if (!found_passive) { | |
3229 | vty_out(vty, | |
3230 | " Passive Interface(s):\n"); | |
3231 | found_passive = 1; | |
3232 | } | |
3233 | vty_out(vty, " %s\n", ifp->name); | |
3234 | } | |
3235 | } | |
718e3744 | 3236 | } |
3237 | ||
d62a17ae | 3238 | vty_out(vty, " Routing Information Sources:\n"); |
3239 | vty_out(vty, | |
3240 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
045c5389 | 3241 | rip_peer_display(vty, rip); |
718e3744 | 3242 | |
045c5389 | 3243 | rip_distance_show(vty, rip); |
718e3744 | 3244 | |
d62a17ae | 3245 | return CMD_SUCCESS; |
3246 | } | |
718e3744 | 3247 | |
d62a17ae | 3248 | /* RIP configuration write function. */ |
3249 | static int config_write_rip(struct vty *vty) | |
3250 | { | |
ae7b826a | 3251 | struct rip *rip; |
d62a17ae | 3252 | int write = 0; |
d62a17ae | 3253 | |
ae7b826a RW |
3254 | RB_FOREACH(rip, rip_instance_head, &rip_instances) { |
3255 | char xpath[XPATH_MAXLEN]; | |
3256 | struct lyd_node *dnode; | |
045c5389 | 3257 | |
ae7b826a RW |
3258 | snprintf(xpath, sizeof(xpath), |
3259 | "/frr-ripd:ripd/instance[vrf='%s']", rip->vrf_name); | |
3260 | ||
3261 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
3262 | assert(dnode); | |
d62a17ae | 3263 | |
8c9226c2 RW |
3264 | nb_cli_show_dnode_cmds(vty, dnode, false); |
3265 | ||
ae7b826a RW |
3266 | /* Distribute configuration. */ |
3267 | config_write_distribute(vty, rip->distribute_ctx); | |
d62a17ae | 3268 | |
ae7b826a | 3269 | /* Interface routemap configuration */ |
8f88441d | 3270 | config_write_if_rmap(vty, rip->if_rmap_ctx); |
ae7b826a | 3271 | |
07679ad9 IR |
3272 | vty_out(vty, "exit\n"); |
3273 | ||
ae7b826a | 3274 | write = 1; |
d62a17ae | 3275 | } |
ae7b826a | 3276 | |
d62a17ae | 3277 | return write; |
3278 | } | |
718e3744 | 3279 | |
612c2c15 | 3280 | static int config_write_rip(struct vty *vty); |
d62a17ae | 3281 | /* RIP node structure. */ |
62b346ee | 3282 | static struct cmd_node rip_node = { |
f4b8291f | 3283 | .name = "rip", |
62b346ee | 3284 | .node = RIP_NODE, |
24389580 | 3285 | .parent_node = CONFIG_NODE, |
62b346ee | 3286 | .prompt = "%s(config-router)# ", |
612c2c15 | 3287 | .config_write = config_write_rip, |
62b346ee | 3288 | }; |
718e3744 | 3289 | |
d62a17ae | 3290 | /* Distribute-list update functions. */ |
03a38493 PG |
3291 | static void rip_distribute_update(struct distribute_ctx *ctx, |
3292 | struct distribute *dist) | |
d62a17ae | 3293 | { |
3294 | struct interface *ifp; | |
3295 | struct rip_interface *ri; | |
3296 | struct access_list *alist; | |
3297 | struct prefix_list *plist; | |
8478ae7e | 3298 | |
ae7b826a | 3299 | if (!ctx->vrf || !dist->ifname) |
d62a17ae | 3300 | return; |
718e3744 | 3301 | |
a36898e7 | 3302 | ifp = if_lookup_by_name(dist->ifname, ctx->vrf->vrf_id); |
d62a17ae | 3303 | if (ifp == NULL) |
3304 | return; | |
718e3744 | 3305 | |
d62a17ae | 3306 | ri = ifp->info; |
6b0655a2 | 3307 | |
d62a17ae | 3308 | if (dist->list[DISTRIBUTE_V4_IN]) { |
3309 | alist = access_list_lookup(AFI_IP, | |
3310 | dist->list[DISTRIBUTE_V4_IN]); | |
3311 | if (alist) | |
3312 | ri->list[RIP_FILTER_IN] = alist; | |
3313 | else | |
3314 | ri->list[RIP_FILTER_IN] = NULL; | |
3315 | } else | |
3316 | ri->list[RIP_FILTER_IN] = NULL; | |
3317 | ||
3318 | if (dist->list[DISTRIBUTE_V4_OUT]) { | |
3319 | alist = access_list_lookup(AFI_IP, | |
3320 | dist->list[DISTRIBUTE_V4_OUT]); | |
3321 | if (alist) | |
3322 | ri->list[RIP_FILTER_OUT] = alist; | |
3323 | else | |
3324 | ri->list[RIP_FILTER_OUT] = NULL; | |
3325 | } else | |
3326 | ri->list[RIP_FILTER_OUT] = NULL; | |
3327 | ||
3328 | if (dist->prefix[DISTRIBUTE_V4_IN]) { | |
3329 | plist = prefix_list_lookup(AFI_IP, | |
3330 | dist->prefix[DISTRIBUTE_V4_IN]); | |
3331 | if (plist) | |
3332 | ri->prefix[RIP_FILTER_IN] = plist; | |
3333 | else | |
3334 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3335 | } else | |
3336 | ri->prefix[RIP_FILTER_IN] = NULL; | |
3337 | ||
3338 | if (dist->prefix[DISTRIBUTE_V4_OUT]) { | |
3339 | plist = prefix_list_lookup(AFI_IP, | |
3340 | dist->prefix[DISTRIBUTE_V4_OUT]); | |
3341 | if (plist) | |
3342 | ri->prefix[RIP_FILTER_OUT] = plist; | |
3343 | else | |
3344 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3345 | } else | |
3346 | ri->prefix[RIP_FILTER_OUT] = NULL; | |
3347 | } | |
3348 | ||
3349 | void rip_distribute_update_interface(struct interface *ifp) | |
3350 | { | |
045c5389 RW |
3351 | struct rip_interface *ri = ifp->info; |
3352 | struct rip *rip = ri->rip; | |
d62a17ae | 3353 | struct distribute *dist; |
3354 | ||
03a38493 PG |
3355 | if (!rip) |
3356 | return; | |
3357 | dist = distribute_lookup(rip->distribute_ctx, ifp->name); | |
d62a17ae | 3358 | if (dist) |
03a38493 | 3359 | rip_distribute_update(rip->distribute_ctx, dist); |
718e3744 | 3360 | } |
3361 | ||
3362 | /* Update all interface's distribute list. */ | |
02ff83c5 | 3363 | /* ARGSUSED */ |
d62a17ae | 3364 | static void rip_distribute_update_all(struct prefix_list *notused) |
718e3744 | 3365 | { |
f4e14fdb | 3366 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 3367 | struct interface *ifp; |
718e3744 | 3368 | |
451fda4f | 3369 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3370 | rip_distribute_update_interface(ifp); |
718e3744 | 3371 | } |
11dde9c2 | 3372 | /* ARGSUSED */ |
d62a17ae | 3373 | static void rip_distribute_update_all_wrapper(struct access_list *notused) |
11dde9c2 | 3374 | { |
d62a17ae | 3375 | rip_distribute_update_all(NULL); |
11dde9c2 | 3376 | } |
6b0655a2 | 3377 | |
718e3744 | 3378 | /* Delete all added rip route. */ |
045c5389 | 3379 | void rip_clean(struct rip *rip) |
718e3744 | 3380 | { |
eb6b3885 IR |
3381 | rip_interfaces_clean(rip); |
3382 | ||
ae7b826a RW |
3383 | if (rip->enabled) |
3384 | rip_instance_disable(rip); | |
d62a17ae | 3385 | |
2d2eaa13 | 3386 | stream_free(rip->obuf); |
d62a17ae | 3387 | |
2d2eaa13 | 3388 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) |
f9120f71 RW |
3389 | if (rip->redist[i].route_map.name) |
3390 | free(rip->redist[i].route_map.name); | |
2d2eaa13 RW |
3391 | |
3392 | route_table_finish(rip->table); | |
3393 | route_table_finish(rip->neighbor); | |
711915d2 | 3394 | list_delete(&rip->peer_list); |
2d2eaa13 | 3395 | distribute_list_delete(&rip->distribute_ctx); |
8f88441d | 3396 | if_rmap_ctx_delete(rip->if_rmap_ctx); |
d62a17ae | 3397 | |
045c5389 RW |
3398 | rip_clean_network(rip); |
3399 | rip_passive_nondefault_clean(rip); | |
ca046902 | 3400 | vector_free(rip->enable_interface); |
1205fdc4 | 3401 | route_table_finish(rip->enable_network); |
5a29c0d5 | 3402 | vector_free(rip->passive_nondefault); |
3f21c8c4 | 3403 | list_delete(&rip->offset_list_master); |
2826309c | 3404 | route_table_finish(rip->distance_table); |
045c5389 | 3405 | |
ae7b826a RW |
3406 | RB_REMOVE(rip_instance_head, &rip_instances, rip); |
3407 | XFREE(MTYPE_RIP_VRF_NAME, rip->vrf_name); | |
2d2eaa13 | 3408 | XFREE(MTYPE_RIP, rip); |
718e3744 | 3409 | } |
3410 | ||
4b23867c PG |
3411 | static void rip_if_rmap_update(struct if_rmap_ctx *ctx, |
3412 | struct if_rmap *if_rmap) | |
16705130 | 3413 | { |
aec0d756 | 3414 | struct interface *ifp = NULL; |
d62a17ae | 3415 | struct rip_interface *ri; |
3416 | struct route_map *rmap; | |
aec0d756 | 3417 | struct vrf *vrf = NULL; |
16705130 | 3418 | |
aec0d756 PG |
3419 | if (ctx->name) |
3420 | vrf = vrf_lookup_by_name(ctx->name); | |
3421 | if (vrf) | |
a36898e7 | 3422 | ifp = if_lookup_by_name(if_rmap->ifname, vrf->vrf_id); |
d62a17ae | 3423 | if (ifp == NULL) |
3424 | return; | |
16705130 | 3425 | |
d62a17ae | 3426 | ri = ifp->info; |
d62a17ae | 3427 | if (if_rmap->routemap[IF_RMAP_IN]) { |
3428 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
3429 | if (rmap) | |
3430 | ri->routemap[IF_RMAP_IN] = rmap; | |
3431 | else | |
3432 | ri->routemap[IF_RMAP_IN] = NULL; | |
3433 | } else | |
3434 | ri->routemap[RIP_FILTER_IN] = NULL; | |
16705130 | 3435 | |
d62a17ae | 3436 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
3437 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
3438 | if (rmap) | |
3439 | ri->routemap[IF_RMAP_OUT] = rmap; | |
3440 | else | |
3441 | ri->routemap[IF_RMAP_OUT] = NULL; | |
3442 | } else | |
3443 | ri->routemap[RIP_FILTER_OUT] = NULL; | |
16705130 | 3444 | } |
3445 | ||
d62a17ae | 3446 | void rip_if_rmap_update_interface(struct interface *ifp) |
16705130 | 3447 | { |
8f88441d RW |
3448 | struct rip_interface *ri = ifp->info; |
3449 | struct rip *rip = ri->rip; | |
d62a17ae | 3450 | struct if_rmap *if_rmap; |
4b23867c | 3451 | struct if_rmap_ctx *ctx; |
16705130 | 3452 | |
4b23867c PG |
3453 | if (!rip) |
3454 | return; | |
4b23867c PG |
3455 | ctx = rip->if_rmap_ctx; |
3456 | if (!ctx) | |
3457 | return; | |
3458 | if_rmap = if_rmap_lookup(ctx, ifp->name); | |
d62a17ae | 3459 | if (if_rmap) |
4b23867c | 3460 | rip_if_rmap_update(ctx, if_rmap); |
16705130 | 3461 | } |
3462 | ||
045c5389 | 3463 | static void rip_routemap_update_redistribute(struct rip *rip) |
16705130 | 3464 | { |
045c5389 | 3465 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
8f88441d | 3466 | if (rip->redist[i].route_map.name) { |
f9120f71 RW |
3467 | rip->redist[i].route_map.map = route_map_lookup_by_name( |
3468 | rip->redist[i].route_map.name); | |
8f88441d RW |
3469 | route_map_counter_increment( |
3470 | rip->redist[i].route_map.map); | |
d62a17ae | 3471 | } |
16705130 | 3472 | } |
16705130 | 3473 | } |
3474 | ||
11dde9c2 | 3475 | /* ARGSUSED */ |
d62a17ae | 3476 | static void rip_routemap_update(const char *notused) |
16705130 | 3477 | { |
f4e14fdb | 3478 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
045c5389 | 3479 | struct rip *rip; |
d62a17ae | 3480 | struct interface *ifp; |
16705130 | 3481 | |
451fda4f | 3482 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 3483 | rip_if_rmap_update_interface(ifp); |
16705130 | 3484 | |
045c5389 RW |
3485 | rip = vrf->info; |
3486 | if (rip) | |
3487 | rip_routemap_update_redistribute(rip); | |
16705130 | 3488 | } |
3489 | ||
ae7b826a RW |
3490 | /* Link RIP instance to VRF. */ |
3491 | static void rip_vrf_link(struct rip *rip, struct vrf *vrf) | |
3492 | { | |
3493 | struct interface *ifp; | |
3494 | ||
3495 | rip->vrf = vrf; | |
3496 | rip->distribute_ctx->vrf = vrf; | |
3497 | vrf->info = rip; | |
3498 | ||
3499 | FOR_ALL_INTERFACES (vrf, ifp) | |
3500 | rip_interface_sync(ifp); | |
3501 | } | |
3502 | ||
3503 | /* Unlink RIP instance from VRF. */ | |
3504 | static void rip_vrf_unlink(struct rip *rip, struct vrf *vrf) | |
3505 | { | |
3506 | struct interface *ifp; | |
3507 | ||
3508 | rip->vrf = NULL; | |
3509 | rip->distribute_ctx->vrf = NULL; | |
3510 | vrf->info = NULL; | |
3511 | ||
3512 | FOR_ALL_INTERFACES (vrf, ifp) | |
3513 | rip_interface_sync(ifp); | |
3514 | } | |
3515 | ||
3516 | static void rip_instance_enable(struct rip *rip, struct vrf *vrf, int sock) | |
3517 | { | |
3518 | rip->sock = sock; | |
3519 | ||
3520 | rip_vrf_link(rip, vrf); | |
3521 | rip->enabled = true; | |
3522 | ||
f9120f71 RW |
3523 | /* Resend all redistribute requests. */ |
3524 | rip_redistribute_enable(rip); | |
3525 | ||
ae7b826a RW |
3526 | /* Create read and timer thread. */ |
3527 | rip_event(rip, RIP_READ, rip->sock); | |
3528 | rip_event(rip, RIP_UPDATE_EVENT, 1); | |
3529 | ||
3530 | rip_zebra_vrf_register(vrf); | |
3531 | } | |
3532 | ||
3533 | static void rip_instance_disable(struct rip *rip) | |
3534 | { | |
3535 | struct vrf *vrf = rip->vrf; | |
3536 | struct route_node *rp; | |
3537 | ||
3538 | /* Clear RIP routes */ | |
3539 | for (rp = route_top(rip->table); rp; rp = route_next(rp)) { | |
3540 | struct rip_info *rinfo; | |
3541 | struct list *list; | |
3542 | struct listnode *listnode; | |
3543 | ||
3544 | if ((list = rp->info) == NULL) | |
3545 | continue; | |
3546 | ||
3547 | rinfo = listgetdata(listhead(list)); | |
3548 | if (rip_route_rte(rinfo)) | |
3549 | rip_zebra_ipv4_delete(rip, rp); | |
3550 | ||
3551 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
3552 | RIP_TIMER_OFF(rinfo->t_timeout); | |
3553 | RIP_TIMER_OFF(rinfo->t_garbage_collect); | |
3554 | rip_info_free(rinfo); | |
3555 | } | |
3556 | list_delete(&list); | |
3557 | rp->info = NULL; | |
3558 | route_unlock_node(rp); | |
3559 | } | |
3560 | ||
f9120f71 RW |
3561 | /* Flush all redistribute requests. */ |
3562 | rip_redistribute_disable(rip); | |
3563 | ||
ae7b826a RW |
3564 | /* Cancel RIP related timers. */ |
3565 | RIP_TIMER_OFF(rip->t_update); | |
3566 | RIP_TIMER_OFF(rip->t_triggered_update); | |
3567 | RIP_TIMER_OFF(rip->t_triggered_interval); | |
3568 | ||
3569 | /* Cancel read thread. */ | |
50478845 | 3570 | thread_cancel(&rip->t_read); |
ae7b826a RW |
3571 | |
3572 | /* Close RIP socket. */ | |
3573 | close(rip->sock); | |
3574 | rip->sock = -1; | |
3575 | ||
3576 | /* Clear existing peers. */ | |
3577 | list_delete_all_node(rip->peer_list); | |
3578 | ||
3579 | rip_zebra_vrf_deregister(vrf); | |
3580 | ||
3581 | rip_vrf_unlink(rip, vrf); | |
3582 | rip->enabled = false; | |
3583 | } | |
3584 | ||
3585 | static int rip_vrf_new(struct vrf *vrf) | |
3586 | { | |
3587 | if (IS_RIP_DEBUG_EVENT) | |
3588 | zlog_debug("%s: VRF created: %s(%u)", __func__, vrf->name, | |
3589 | vrf->vrf_id); | |
3590 | ||
3591 | return 0; | |
3592 | } | |
3593 | ||
3594 | static int rip_vrf_delete(struct vrf *vrf) | |
3595 | { | |
3596 | if (IS_RIP_DEBUG_EVENT) | |
3597 | zlog_debug("%s: VRF deleted: %s(%u)", __func__, vrf->name, | |
3598 | vrf->vrf_id); | |
3599 | ||
3600 | return 0; | |
3601 | } | |
3602 | ||
3603 | static int rip_vrf_enable(struct vrf *vrf) | |
3604 | { | |
3605 | struct rip *rip; | |
3606 | int socket; | |
3607 | ||
3608 | rip = rip_lookup_by_vrf_name(vrf->name); | |
3609 | if (!rip || rip->enabled) | |
3610 | return 0; | |
3611 | ||
3612 | if (IS_RIP_DEBUG_EVENT) | |
3613 | zlog_debug("%s: VRF %s(%u) enabled", __func__, vrf->name, | |
3614 | vrf->vrf_id); | |
3615 | ||
3616 | /* Activate the VRF RIP instance. */ | |
3617 | if (!rip->enabled) { | |
3618 | socket = rip_create_socket(vrf); | |
3619 | if (socket < 0) | |
3620 | return -1; | |
3621 | ||
3622 | rip_instance_enable(rip, vrf, socket); | |
3623 | } | |
3624 | ||
3625 | return 0; | |
3626 | } | |
3627 | ||
3628 | static int rip_vrf_disable(struct vrf *vrf) | |
3629 | { | |
3630 | struct rip *rip; | |
3631 | ||
3632 | rip = rip_lookup_by_vrf_name(vrf->name); | |
3633 | if (!rip || !rip->enabled) | |
3634 | return 0; | |
3635 | ||
3636 | if (IS_RIP_DEBUG_EVENT) | |
3637 | zlog_debug("%s: VRF %s(%u) disabled", __func__, vrf->name, | |
3638 | vrf->vrf_id); | |
3639 | ||
3640 | /* Deactivate the VRF RIP instance. */ | |
3641 | if (rip->enabled) | |
3642 | rip_instance_disable(rip); | |
3643 | ||
3644 | return 0; | |
3645 | } | |
3646 | ||
3647 | void rip_vrf_init(void) | |
3648 | { | |
ac2cb9bf | 3649 | vrf_init(rip_vrf_new, rip_vrf_enable, rip_vrf_disable, rip_vrf_delete); |
f5eef2d5 | 3650 | |
cfc369c4 | 3651 | vrf_cmd_init(NULL); |
ae7b826a RW |
3652 | } |
3653 | ||
3654 | void rip_vrf_terminate(void) | |
3655 | { | |
3656 | vrf_terminate(); | |
3657 | } | |
3658 | ||
718e3744 | 3659 | /* Allocate new rip structure and set default value. */ |
d62a17ae | 3660 | void rip_init(void) |
3661 | { | |
3662 | /* Install top nodes. */ | |
612c2c15 | 3663 | install_node(&rip_node); |
d62a17ae | 3664 | |
3665 | /* Install rip commands. */ | |
3666 | install_element(VIEW_NODE, &show_ip_rip_cmd); | |
3667 | install_element(VIEW_NODE, &show_ip_rip_status_cmd); | |
d62a17ae | 3668 | |
3669 | install_default(RIP_NODE); | |
d62a17ae | 3670 | |
3671 | /* Debug related init. */ | |
3672 | rip_debug_init(); | |
3673 | ||
3674 | /* Access list install. */ | |
3675 | access_list_init(); | |
3676 | access_list_add_hook(rip_distribute_update_all_wrapper); | |
3677 | access_list_delete_hook(rip_distribute_update_all_wrapper); | |
3678 | ||
3679 | /* Prefix list initialize.*/ | |
3680 | prefix_list_init(); | |
3681 | prefix_list_add_hook(rip_distribute_update_all); | |
3682 | prefix_list_delete_hook(rip_distribute_update_all); | |
3683 | ||
d62a17ae | 3684 | /* Route-map */ |
3685 | rip_route_map_init(); | |
d62a17ae | 3686 | |
3687 | route_map_add_hook(rip_routemap_update); | |
3688 | route_map_delete_hook(rip_routemap_update); | |
3689 | ||
3690 | if_rmap_init(RIP_NODE); | |
718e3744 | 3691 | } |