1 /* RIP version 1 and 2.
2 * Copyright (C) 2005 6WIND <alain.ritoux@6wind.com>
3 * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro <kunihiro@zebra.org>
5 * This file is part of GNU Zebra.
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
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.
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
34 #include "sockunion.h"
39 #include "distribute.h"
44 #include "ripd/ripd.h"
45 #include "ripd/rip_debug.h"
49 /* UDP receive buffer size */
50 #define RIP_UDP_RCV_BUF 41600
53 struct rip
*rip
= NULL
;
55 /* RIP neighbor address table. */
56 struct route_table
*rip_neighbor_table
;
58 /* RIP route changes. */
59 long rip_global_route_changes
= 0;
62 long rip_global_queries
= 0;
65 static void rip_event(enum rip_event
, int);
66 static void rip_output_process(struct connected
*, struct sockaddr_in
*, int,
68 static int rip_triggered_update(struct thread
*);
69 static int rip_update_jitter(unsigned long);
71 /* RIP output routes type. */
72 enum { rip_all_route
, rip_changed_route
};
74 /* RIP command strings. */
75 static const struct message rip_msg
[] = {{RIP_REQUEST
, "REQUEST"},
76 {RIP_RESPONSE
, "RESPONSE"},
77 {RIP_TRACEON
, "TRACEON"},
78 {RIP_TRACEOFF
, "TRACEOFF"},
80 {RIP_POLL_ENTRY
, "POLL ENTRY"},
83 /* Utility function to set boradcast option to the socket. */
84 static int sockopt_broadcast(int sock
)
89 ret
= setsockopt(sock
, SOL_SOCKET
, SO_BROADCAST
, (char *)&on
,
92 zlog_warn("can't set sockopt SO_BROADCAST to socket %d", sock
);
98 static int rip_route_rte(struct rip_info
*rinfo
)
100 return (rinfo
->type
== ZEBRA_ROUTE_RIP
101 && rinfo
->sub_type
== RIP_ROUTE_RTE
);
104 static struct rip_info
*rip_info_new(void)
106 return XCALLOC(MTYPE_RIP_INFO
, sizeof(struct rip_info
));
109 void rip_info_free(struct rip_info
*rinfo
)
111 XFREE(MTYPE_RIP_INFO
, rinfo
);
114 /* RIP route garbage collect timer. */
115 static int rip_garbage_collect(struct thread
*t
)
117 struct rip_info
*rinfo
;
118 struct route_node
*rp
;
120 rinfo
= THREAD_ARG(t
);
121 rinfo
->t_garbage_collect
= NULL
;
123 /* Off timeout timer. */
124 RIP_TIMER_OFF(rinfo
->t_timeout
);
126 /* Get route_node pointer. */
129 /* Unlock route_node. */
130 listnode_delete(rp
->info
, rinfo
);
131 if (list_isempty((struct list
*)rp
->info
)) {
132 list_delete_and_null((struct list
**)&rp
->info
);
133 route_unlock_node(rp
);
136 /* Free RIP routing information. */
137 rip_info_free(rinfo
);
142 static void rip_timeout_update(struct rip_info
*rinfo
);
144 /* Add new route to the ECMP list.
145 * RETURN: the new entry added in the list, or NULL if it is not the first
146 * entry and ECMP is not allowed.
148 struct rip_info
*rip_ecmp_add(struct rip_info
*rinfo_new
)
150 struct route_node
*rp
= rinfo_new
->rp
;
151 struct rip_info
*rinfo
= NULL
;
152 struct list
*list
= NULL
;
154 if (rp
->info
== NULL
)
155 rp
->info
= list_new();
156 list
= (struct list
*)rp
->info
;
158 /* If ECMP is not allowed and some entry already exists in the list,
160 if (listcount(list
) && !rip
->ecmp
)
163 rinfo
= rip_info_new();
164 memcpy(rinfo
, rinfo_new
, sizeof(struct rip_info
));
165 listnode_add(list
, rinfo
);
167 if (rip_route_rte(rinfo
)) {
168 rip_timeout_update(rinfo
);
169 rip_zebra_ipv4_add(rp
);
172 /* Set the route change flag on the first entry. */
173 rinfo
= listgetdata(listhead(list
));
174 SET_FLAG(rinfo
->flags
, RIP_RTF_CHANGED
);
176 /* Signal the output process to trigger an update (see section 2.5). */
177 rip_event(RIP_TRIGGERED_UPDATE
, 0);
182 /* Replace the ECMP list with the new route.
183 * RETURN: the new entry added in the list
185 struct rip_info
*rip_ecmp_replace(struct rip_info
*rinfo_new
)
187 struct route_node
*rp
= rinfo_new
->rp
;
188 struct list
*list
= (struct list
*)rp
->info
;
189 struct rip_info
*rinfo
= NULL
, *tmp_rinfo
= NULL
;
190 struct listnode
*node
= NULL
, *nextnode
= NULL
;
192 if (list
== NULL
|| listcount(list
) == 0)
193 return rip_ecmp_add(rinfo_new
);
195 /* Get the first entry */
196 rinfo
= listgetdata(listhead(list
));
198 /* Learnt route replaced by a local one. Delete it from zebra. */
199 if (rip_route_rte(rinfo
) && !rip_route_rte(rinfo_new
))
200 if (CHECK_FLAG(rinfo
->flags
, RIP_RTF_FIB
))
201 rip_zebra_ipv4_delete(rp
);
203 /* Re-use the first entry, and delete the others. */
204 for (ALL_LIST_ELEMENTS(list
, node
, nextnode
, tmp_rinfo
))
205 if (tmp_rinfo
!= rinfo
) {
206 RIP_TIMER_OFF(tmp_rinfo
->t_timeout
);
207 RIP_TIMER_OFF(tmp_rinfo
->t_garbage_collect
);
208 list_delete_node(list
, node
);
209 rip_info_free(tmp_rinfo
);
212 RIP_TIMER_OFF(rinfo
->t_timeout
);
213 RIP_TIMER_OFF(rinfo
->t_garbage_collect
);
214 memcpy(rinfo
, rinfo_new
, sizeof(struct rip_info
));
216 if (rip_route_rte(rinfo
)) {
217 rip_timeout_update(rinfo
);
218 /* The ADD message implies an update. */
219 rip_zebra_ipv4_add(rp
);
222 /* Set the route change flag. */
223 SET_FLAG(rinfo
->flags
, RIP_RTF_CHANGED
);
225 /* Signal the output process to trigger an update (see section 2.5). */
226 rip_event(RIP_TRIGGERED_UPDATE
, 0);
231 /* Delete one route from the ECMP list.
233 * null - the entry is freed, and other entries exist in the list
234 * the entry - the entry is the last one in the list; its metric is set
235 * to INFINITY, and the garbage collector is started for it
237 struct rip_info
*rip_ecmp_delete(struct rip_info
*rinfo
)
239 struct route_node
*rp
= rinfo
->rp
;
240 struct list
*list
= (struct list
*)rp
->info
;
242 RIP_TIMER_OFF(rinfo
->t_timeout
);
244 if (listcount(list
) > 1) {
245 /* Some other ECMP entries still exist. Just delete this entry.
247 RIP_TIMER_OFF(rinfo
->t_garbage_collect
);
248 listnode_delete(list
, rinfo
);
249 if (rip_route_rte(rinfo
)
250 && CHECK_FLAG(rinfo
->flags
, RIP_RTF_FIB
))
251 /* The ADD message implies the update. */
252 rip_zebra_ipv4_add(rp
);
253 rip_info_free(rinfo
);
256 assert(rinfo
== listgetdata(listhead(list
)));
258 /* This is the only entry left in the list. We must keep it in
259 * the list for garbage collection time, with INFINITY metric.
262 rinfo
->metric
= RIP_METRIC_INFINITY
;
263 RIP_TIMER_ON(rinfo
->t_garbage_collect
, rip_garbage_collect
,
266 if (rip_route_rte(rinfo
)
267 && CHECK_FLAG(rinfo
->flags
, RIP_RTF_FIB
))
268 rip_zebra_ipv4_delete(rp
);
271 /* Set the route change flag on the first entry. */
272 rinfo
= listgetdata(listhead(list
));
273 SET_FLAG(rinfo
->flags
, RIP_RTF_CHANGED
);
275 /* Signal the output process to trigger an update (see section 2.5). */
276 rip_event(RIP_TRIGGERED_UPDATE
, 0);
281 /* Timeout RIP routes. */
282 static int rip_timeout(struct thread
*t
)
284 rip_ecmp_delete((struct rip_info
*)THREAD_ARG(t
));
288 static void rip_timeout_update(struct rip_info
*rinfo
)
290 if (rinfo
->metric
!= RIP_METRIC_INFINITY
) {
291 RIP_TIMER_OFF(rinfo
->t_timeout
);
292 RIP_TIMER_ON(rinfo
->t_timeout
, rip_timeout
, rip
->timeout_time
);
296 static int rip_filter(int rip_distribute
, struct prefix_ipv4
*p
,
297 struct rip_interface
*ri
)
299 struct distribute
*dist
;
300 struct access_list
*alist
;
301 struct prefix_list
*plist
;
302 int distribute
= rip_distribute
== RIP_FILTER_OUT
? DISTRIBUTE_V4_OUT
304 const char *inout
= rip_distribute
== RIP_FILTER_OUT
? "out" : "in";
306 /* Input distribute-list filtering. */
307 if (ri
->list
[rip_distribute
]) {
308 if (access_list_apply(ri
->list
[rip_distribute
],
311 if (IS_RIP_DEBUG_PACKET
)
312 zlog_debug("%s/%d filtered by distribute %s",
313 inet_ntoa(p
->prefix
), p
->prefixlen
,
318 if (ri
->prefix
[rip_distribute
]) {
319 if (prefix_list_apply(ri
->prefix
[rip_distribute
],
322 if (IS_RIP_DEBUG_PACKET
)
323 zlog_debug("%s/%d filtered by prefix-list %s",
324 inet_ntoa(p
->prefix
), p
->prefixlen
,
330 /* All interface filter check. */
331 dist
= distribute_lookup(NULL
);
333 if (dist
->list
[distribute
]) {
334 alist
= access_list_lookup(AFI_IP
,
335 dist
->list
[distribute
]);
338 if (access_list_apply(alist
, (struct prefix
*)p
)
340 if (IS_RIP_DEBUG_PACKET
)
342 "%s/%d filtered by distribute %s",
343 inet_ntoa(p
->prefix
),
344 p
->prefixlen
, inout
);
349 if (dist
->prefix
[distribute
]) {
350 plist
= prefix_list_lookup(AFI_IP
,
351 dist
->prefix
[distribute
]);
354 if (prefix_list_apply(plist
, (struct prefix
*)p
)
356 if (IS_RIP_DEBUG_PACKET
)
358 "%s/%d filtered by prefix-list %s",
359 inet_ntoa(p
->prefix
),
360 p
->prefixlen
, inout
);
369 /* Check nexthop address validity. */
370 static int rip_nexthop_check(struct in_addr
*addr
)
372 struct vrf
*vrf
= vrf_lookup_by_id(VRF_DEFAULT
);
373 struct interface
*ifp
;
374 struct listnode
*cnode
;
375 struct connected
*ifc
;
378 /* If nexthop address matches local configured address then it is
381 FOR_ALL_INTERFACES (vrf
, ifp
) {
382 for (ALL_LIST_ELEMENTS_RO(ifp
->connected
, cnode
, ifc
)) {
385 if (p
->family
== AF_INET
386 && IPV4_ADDR_SAME(&p
->u
.prefix4
, addr
))
393 /* RIP add route to routing table. */
394 static void rip_rte_process(struct rte
*rte
, struct sockaddr_in
*from
,
395 struct interface
*ifp
)
398 struct prefix_ipv4 p
;
399 struct route_node
*rp
;
400 struct rip_info
*rinfo
= NULL
, newinfo
;
401 struct rip_interface
*ri
;
402 struct in_addr
*nexthop
;
404 unsigned char old_dist
, new_dist
;
405 struct list
*list
= NULL
;
406 struct listnode
*node
= NULL
;
408 /* Make prefix structure. */
409 memset(&p
, 0, sizeof(struct prefix_ipv4
));
411 p
.prefix
= rte
->prefix
;
412 p
.prefixlen
= ip_masklen(rte
->mask
);
414 /* Make sure mask is applied. */
417 /* Apply input filters. */
420 ret
= rip_filter(RIP_FILTER_IN
, &p
, ri
);
424 memset(&newinfo
, 0, sizeof(newinfo
));
425 newinfo
.type
= ZEBRA_ROUTE_RIP
;
426 newinfo
.sub_type
= RIP_ROUTE_RTE
;
427 newinfo
.nh
.gate
.ipv4
= rte
->nexthop
;
428 newinfo
.from
= from
->sin_addr
;
429 newinfo
.nh
.ifindex
= ifp
->ifindex
;
430 newinfo
.nh
.type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
431 newinfo
.metric
= rte
->metric
;
432 newinfo
.metric_out
= rte
->metric
; /* XXX */
433 newinfo
.tag
= ntohs(rte
->tag
); /* XXX */
435 /* Modify entry according to the interface routemap. */
436 if (ri
->routemap
[RIP_FILTER_IN
]) {
439 /* The object should be of the type of rip_info */
440 ret
= route_map_apply(ri
->routemap
[RIP_FILTER_IN
],
441 (struct prefix
*)&p
, RMAP_RIP
, &newinfo
);
443 if (ret
== RMAP_DENYMATCH
) {
444 if (IS_RIP_DEBUG_PACKET
)
446 "RIP %s/%d is filtered by route-map in",
447 inet_ntoa(p
.prefix
), p
.prefixlen
);
451 /* Get back the object */
452 rte
->nexthop
= newinfo
.nexthop_out
;
453 rte
->tag
= htons(newinfo
.tag_out
); /* XXX */
454 rte
->metric
= newinfo
.metric_out
; /* XXX: the routemap uses the
458 /* Once the entry has been validated, update the metric by
459 adding the cost of the network on wich the message
460 arrived. If the result is greater than infinity, use infinity
461 (RFC2453 Sec. 3.9.2) */
462 /* Zebra ripd can handle offset-list in. */
463 ret
= rip_offset_list_apply_in(&p
, ifp
, &rte
->metric
);
465 /* If offset-list does not modify the metric use interface's
468 rte
->metric
+= ifp
->metric
? ifp
->metric
: 1;
470 if (rte
->metric
> RIP_METRIC_INFINITY
)
471 rte
->metric
= RIP_METRIC_INFINITY
;
473 /* Set nexthop pointer. */
474 if (rte
->nexthop
.s_addr
== 0)
475 nexthop
= &from
->sin_addr
;
477 nexthop
= &rte
->nexthop
;
479 /* Check if nexthop address is myself, then do nothing. */
480 if (rip_nexthop_check(nexthop
) < 0) {
481 if (IS_RIP_DEBUG_PACKET
)
482 zlog_debug("Nexthop address %s is myself",
483 inet_ntoa(*nexthop
));
487 /* Get index for the prefix. */
488 rp
= route_node_get(rip
->table
, (struct prefix
*)&p
);
491 newinfo
.nh
.gate
.ipv4
= *nexthop
;
492 newinfo
.nh
.type
= NEXTHOP_TYPE_IPV4
;
493 newinfo
.metric
= rte
->metric
;
494 newinfo
.tag
= ntohs(rte
->tag
);
495 newinfo
.distance
= rip_distance_apply(&newinfo
);
497 new_dist
= newinfo
.distance
? newinfo
.distance
498 : ZEBRA_RIP_DISTANCE_DEFAULT
;
500 /* Check to see whether there is already RIP route on the table. */
501 if ((list
= rp
->info
) != NULL
)
502 for (ALL_LIST_ELEMENTS_RO(list
, node
, rinfo
)) {
503 /* Need to compare with redistributed entry or local
505 if (!rip_route_rte(rinfo
))
508 if (IPV4_ADDR_SAME(&rinfo
->from
, &from
->sin_addr
)
509 && IPV4_ADDR_SAME(&rinfo
->nh
.gate
.ipv4
, nexthop
))
512 if (!listnextnode(node
)) {
513 /* Not found in the list */
515 if (rte
->metric
> rinfo
->metric
) {
516 /* New route has a greater metric.
518 route_unlock_node(rp
);
522 if (rte
->metric
< rinfo
->metric
)
523 /* New route has a smaller metric.
524 * Replace the ECMP list
525 * with the new one in below. */
528 /* Metrics are same. We compare the distances.
530 old_dist
= rinfo
->distance
532 : ZEBRA_RIP_DISTANCE_DEFAULT
;
534 if (new_dist
> old_dist
) {
535 /* New route has a greater distance.
537 route_unlock_node(rp
);
541 if (new_dist
< old_dist
)
542 /* New route has a smaller distance.
543 * Replace the ECMP list
544 * with the new one in below. */
547 /* Metrics and distances are both same. Keep
549 * the new route is added in the ECMP list in
555 /* Local static route. */
556 if (rinfo
->type
== ZEBRA_ROUTE_RIP
557 && ((rinfo
->sub_type
== RIP_ROUTE_STATIC
)
558 || (rinfo
->sub_type
== RIP_ROUTE_DEFAULT
))
559 && rinfo
->metric
!= RIP_METRIC_INFINITY
) {
560 route_unlock_node(rp
);
564 /* Redistributed route check. */
565 if (rinfo
->type
!= ZEBRA_ROUTE_RIP
566 && rinfo
->metric
!= RIP_METRIC_INFINITY
) {
567 old_dist
= rinfo
->distance
;
568 /* Only routes directly connected to an interface
570 * may have a valid NULL distance */
571 if (rinfo
->nh
.gate
.ipv4
.s_addr
!= 0)
574 : ZEBRA_RIP_DISTANCE_DEFAULT
;
575 /* If imported route does not have STRICT precedence,
576 mark it as a ghost */
577 if (new_dist
<= old_dist
578 && rte
->metric
!= RIP_METRIC_INFINITY
)
579 rip_ecmp_replace(&newinfo
);
581 route_unlock_node(rp
);
588 route_unlock_node(rp
);
590 /* Now, check to see whether there is already an explicit route
591 for the destination prefix. If there is no such route, add
592 this route to the routing table, unless the metric is
593 infinity (there is no point in adding a route which
595 if (rte
->metric
!= RIP_METRIC_INFINITY
)
596 rip_ecmp_add(&newinfo
);
598 /* Route is there but we are not sure the route is RIP or not.
601 /* If there is an existing route, compare the next hop address
602 to the address of the router from which the datagram came.
603 If this datagram is from the same router as the existing
604 route, reinitialize the timeout. */
605 same
= (IPV4_ADDR_SAME(&rinfo
->from
, &from
->sin_addr
)
606 && (rinfo
->nh
.ifindex
== ifp
->ifindex
));
608 old_dist
= rinfo
->distance
? rinfo
->distance
609 : ZEBRA_RIP_DISTANCE_DEFAULT
;
611 /* Next, compare the metrics. If the datagram is from the same
612 router as the existing route, and the new metric is different
613 than the old one; or, if the new metric is lower than the old
614 one, or if the tag has been changed; or if there is a route
615 with a lower administrave distance; or an update of the
616 distance on the actual route; do the following actions: */
617 if ((same
&& rinfo
->metric
!= rte
->metric
)
618 || (rte
->metric
< rinfo
->metric
)
619 || ((same
) && (rinfo
->metric
== rte
->metric
)
620 && (newinfo
.tag
!= rinfo
->tag
))
621 || (old_dist
> new_dist
)
622 || ((old_dist
!= new_dist
) && same
)) {
623 if (listcount(list
) == 1) {
624 if (newinfo
.metric
!= RIP_METRIC_INFINITY
)
625 rip_ecmp_replace(&newinfo
);
627 rip_ecmp_delete(rinfo
);
629 if (newinfo
.metric
< rinfo
->metric
)
630 rip_ecmp_replace(&newinfo
);
631 else if (newinfo
.metric
> rinfo
->metric
)
632 rip_ecmp_delete(rinfo
);
633 else if (new_dist
< old_dist
)
634 rip_ecmp_replace(&newinfo
);
635 else if (new_dist
> old_dist
)
636 rip_ecmp_delete(rinfo
);
638 int update
= CHECK_FLAG(rinfo
->flags
,
643 assert(newinfo
.metric
644 != RIP_METRIC_INFINITY
);
646 RIP_TIMER_OFF(rinfo
->t_timeout
);
647 RIP_TIMER_OFF(rinfo
->t_garbage_collect
);
648 memcpy(rinfo
, &newinfo
,
649 sizeof(struct rip_info
));
650 rip_timeout_update(rinfo
);
653 rip_zebra_ipv4_add(rp
);
655 /* - Set the route change flag on the
657 rinfo
= listgetdata(listhead(list
));
658 SET_FLAG(rinfo
->flags
, RIP_RTF_CHANGED
);
659 rip_event(RIP_TRIGGERED_UPDATE
, 0);
662 } else /* same & no change */
663 rip_timeout_update(rinfo
);
665 /* Unlock tempolary lock of the route. */
666 route_unlock_node(rp
);
670 /* Dump RIP packet */
671 static void rip_packet_dump(struct rip_packet
*packet
, int size
,
676 const char *command_str
;
677 char pbuf
[BUFSIZ
], nbuf
[BUFSIZ
];
681 /* Set command string. */
682 if (packet
->command
> 0 && packet
->command
< RIP_COMMAND_MAX
)
683 command_str
= lookup_msg(rip_msg
, packet
->command
, NULL
);
685 command_str
= "unknown";
687 /* Dump packet header. */
688 zlog_debug("%s %s version %d packet size %d", sndrcv
, command_str
,
689 packet
->version
, size
);
691 /* Dump each routing table entry. */
694 for (lim
= (caddr_t
)packet
+ size
; (caddr_t
)rte
< lim
; rte
++) {
695 if (packet
->version
== RIPv2
) {
696 netmask
= ip_masklen(rte
->mask
);
698 if (rte
->family
== htons(RIP_FAMILY_AUTH
)) {
700 == htons(RIP_AUTH_SIMPLE_PASSWORD
)) {
701 p
= (uint8_t *)&rte
->prefix
;
704 " family 0x%X type %d auth string: %s",
707 } else if (rte
->tag
== htons(RIP_AUTH_MD5
)) {
708 struct rip_md5_info
*md5
;
710 md5
= (struct rip_md5_info
*)&packet
714 " family 0x%X type %d (MD5 authentication)",
718 " RIP-2 packet len %d Key ID %d"
720 ntohs(md5
->packet_len
),
721 md5
->keyid
, md5
->auth_len
);
722 zlog_debug(" Sequence Number %ld",
723 (unsigned long)ntohl(
725 } else if (rte
->tag
== htons(RIP_AUTH_DATA
)) {
726 p
= (uint8_t *)&rte
->prefix
;
729 " family 0x%X type %d (MD5 data)",
733 " MD5: %02X%02X%02X%02X%02X%02X%02X%02X"
734 "%02X%02X%02X%02X%02X%02X%02X%02X",
735 p
[0], p
[1], p
[2], p
[3], p
[4],
736 p
[5], p
[6], p
[7], p
[8], p
[9],
737 p
[10], p
[11], p
[12], p
[13],
741 " family 0x%X type %d (Unknown auth type)",
747 " %s/%d -> %s family %d tag %" ROUTE_TAG_PRI
749 inet_ntop(AF_INET
, &rte
->prefix
, pbuf
,
752 inet_ntop(AF_INET
, &rte
->nexthop
, nbuf
,
755 (route_tag_t
)ntohs(rte
->tag
),
756 (unsigned long)ntohl(rte
->metric
));
759 " %s family %d tag %" ROUTE_TAG_PRI
761 inet_ntop(AF_INET
, &rte
->prefix
, pbuf
, BUFSIZ
),
763 (route_tag_t
)ntohs(rte
->tag
),
764 (unsigned long)ntohl(rte
->metric
));
769 /* Check if the destination address is valid (unicast; not net 0
770 or 127) (RFC2453 Section 3.9.2 - Page 26). But we don't
771 check net 0 because we accept default route. */
772 static int rip_destination_check(struct in_addr addr
)
774 uint32_t destination
;
776 /* Convert to host byte order. */
777 destination
= ntohl(addr
.s_addr
);
779 if (IPV4_NET127(destination
))
782 /* Net 0 may match to the default route. */
783 if (IPV4_NET0(destination
) && destination
!= 0)
786 /* Unicast address must belong to class A, B, C. */
787 if (IN_CLASSA(destination
))
789 if (IN_CLASSB(destination
))
791 if (IN_CLASSC(destination
))
797 /* RIP version 2 authentication. */
798 static int rip_auth_simple_password(struct rte
*rte
, struct sockaddr_in
*from
,
799 struct interface
*ifp
)
801 struct rip_interface
*ri
;
802 char *auth_str
= (char *)rte
+ offsetof(struct rte
, prefix
);
805 /* reject passwords with zeros in the middle of the string */
806 for (i
= strnlen(auth_str
, 16); i
< 16; i
++) {
807 if (auth_str
[i
] != '\0')
811 if (IS_RIP_DEBUG_EVENT
)
812 zlog_debug("RIPv2 simple password authentication from %s",
813 inet_ntoa(from
->sin_addr
));
817 if (ri
->auth_type
!= RIP_AUTH_SIMPLE_PASSWORD
818 || rte
->tag
!= htons(RIP_AUTH_SIMPLE_PASSWORD
))
821 /* Simple password authentication. */
823 if (strncmp(auth_str
, ri
->auth_str
, 16) == 0)
827 struct keychain
*keychain
;
830 keychain
= keychain_lookup(ri
->key_chain
);
831 if (keychain
== NULL
|| keychain
->key
== NULL
)
834 key
= key_match_for_accept(keychain
, auth_str
);
841 /* RIP version 2 authentication with MD5. */
842 static int rip_auth_md5(struct rip_packet
*packet
, struct sockaddr_in
*from
,
843 int length
, struct interface
*ifp
)
845 struct rip_interface
*ri
;
846 struct rip_md5_info
*md5
;
847 struct rip_md5_data
*md5data
;
848 struct keychain
*keychain
;
851 uint8_t digest
[RIP_AUTH_MD5_SIZE
];
853 char auth_str
[RIP_AUTH_MD5_SIZE
];
855 if (IS_RIP_DEBUG_EVENT
)
856 zlog_debug("RIPv2 MD5 authentication from %s",
857 inet_ntoa(from
->sin_addr
));
860 md5
= (struct rip_md5_info
*)&packet
->rte
;
862 /* Check auth type. */
863 if (ri
->auth_type
!= RIP_AUTH_MD5
|| md5
->type
!= htons(RIP_AUTH_MD5
))
866 /* If the authentication length is less than 16, then it must be wrong
868 * any interpretation of rfc2082. Some implementations also interpret
869 * this as RIP_HEADER_SIZE+ RIP_AUTH_MD5_SIZE, aka
870 * RIP_AUTH_MD5_COMPAT_SIZE.
872 if (!((md5
->auth_len
== RIP_AUTH_MD5_SIZE
)
873 || (md5
->auth_len
== RIP_AUTH_MD5_COMPAT_SIZE
))) {
874 if (IS_RIP_DEBUG_EVENT
)
876 "RIPv2 MD5 authentication, strange authentication "
882 /* grab and verify check packet length */
883 packet_len
= ntohs(md5
->packet_len
);
885 if (packet_len
> (length
- RIP_HEADER_SIZE
- RIP_AUTH_MD5_SIZE
)) {
886 if (IS_RIP_DEBUG_EVENT
)
888 "RIPv2 MD5 authentication, packet length field %d "
889 "greater than received length %d!",
890 md5
->packet_len
, length
);
894 /* retrieve authentication data */
895 md5data
= (struct rip_md5_data
*)(((uint8_t *)packet
) + packet_len
);
897 memset(auth_str
, 0, RIP_AUTH_MD5_SIZE
);
900 keychain
= keychain_lookup(ri
->key_chain
);
901 if (keychain
== NULL
)
904 key
= key_lookup_for_accept(keychain
, md5
->keyid
);
905 if (key
== NULL
|| key
->string
== NULL
)
908 strncpy(auth_str
, key
->string
, RIP_AUTH_MD5_SIZE
);
909 } else if (ri
->auth_str
)
910 strncpy(auth_str
, ri
->auth_str
, RIP_AUTH_MD5_SIZE
);
912 if (auth_str
[0] == 0)
915 /* MD5 digest authentication. */
916 memset(&ctx
, 0, sizeof(ctx
));
918 MD5Update(&ctx
, packet
, packet_len
+ RIP_HEADER_SIZE
);
919 MD5Update(&ctx
, auth_str
, RIP_AUTH_MD5_SIZE
);
920 MD5Final(digest
, &ctx
);
922 if (memcmp(md5data
->digest
, digest
, RIP_AUTH_MD5_SIZE
) == 0)
928 /* Pick correct auth string for sends, prepare auth_str buffer for use.
929 * (left justified and padded).
931 * presumes one of ri or key is valid, and that the auth strings they point
932 * to are nul terminated. If neither are present, auth_str will be fully
936 static void rip_auth_prepare_str_send(struct rip_interface
*ri
, struct key
*key
,
937 char *auth_str
, int len
)
941 memset(auth_str
, 0, len
);
942 if (key
&& key
->string
)
943 strncpy(auth_str
, key
->string
, len
);
944 else if (ri
->auth_str
)
945 strncpy(auth_str
, ri
->auth_str
, len
);
950 /* Write RIPv2 simple password authentication information
952 * auth_str is presumed to be 2 bytes and correctly prepared
953 * (left justified and zero padded).
955 static void rip_auth_simple_write(struct stream
*s
, char *auth_str
, int len
)
957 assert(s
&& len
== RIP_AUTH_SIMPLE_SIZE
);
959 stream_putw(s
, RIP_FAMILY_AUTH
);
960 stream_putw(s
, RIP_AUTH_SIMPLE_PASSWORD
);
961 stream_put(s
, auth_str
, RIP_AUTH_SIMPLE_SIZE
);
966 /* write RIPv2 MD5 "authentication header"
967 * (uses the auth key data field)
969 * Digest offset field is set to 0.
971 * returns: offset of the digest offset field, which must be set when
972 * length to the auth-data MD5 digest is known.
974 static size_t rip_auth_md5_ah_write(struct stream
*s
, struct rip_interface
*ri
,
979 assert(s
&& ri
&& ri
->auth_type
== RIP_AUTH_MD5
);
981 /* MD5 authentication. */
982 stream_putw(s
, RIP_FAMILY_AUTH
);
983 stream_putw(s
, RIP_AUTH_MD5
);
985 /* MD5 AH digest offset field.
987 * Set to placeholder value here, to true value when RIP-2 Packet length
988 * is known. Actual value is set in .....().
990 doff
= stream_get_endp(s
);
995 stream_putc(s
, key
->index
% 256);
999 /* Auth Data Len. Set 16 for MD5 authentication data. Older ripds
1000 * however expect RIP_HEADER_SIZE + RIP_AUTH_MD5_SIZE so we allow for
1002 * to be configurable.
1004 stream_putc(s
, ri
->md5_auth_len
);
1006 /* Sequence Number (non-decreasing). */
1007 /* RFC2080: The value used in the sequence number is
1008 arbitrary, but two suggestions are the time of the
1009 message's creation or a simple message counter. */
1010 stream_putl(s
, time(NULL
));
1012 /* Reserved field must be zero. */
1019 /* If authentication is in used, write the appropriate header
1020 * returns stream offset to which length must later be written
1021 * or 0 if this is not required
1023 static size_t rip_auth_header_write(struct stream
*s
, struct rip_interface
*ri
,
1024 struct key
*key
, char *auth_str
, int len
)
1026 assert(ri
->auth_type
!= RIP_NO_AUTH
);
1028 switch (ri
->auth_type
) {
1029 case RIP_AUTH_SIMPLE_PASSWORD
:
1030 rip_auth_prepare_str_send(ri
, key
, auth_str
, len
);
1031 rip_auth_simple_write(s
, auth_str
, len
);
1034 return rip_auth_md5_ah_write(s
, ri
, key
);
1040 /* Write RIPv2 MD5 authentication data trailer */
1041 static void rip_auth_md5_set(struct stream
*s
, struct rip_interface
*ri
,
1042 size_t doff
, char *auth_str
, int authlen
)
1046 unsigned char digest
[RIP_AUTH_MD5_SIZE
];
1048 /* Make it sure this interface is configured as MD5
1050 assert((ri
->auth_type
== RIP_AUTH_MD5
)
1051 && (authlen
== RIP_AUTH_MD5_SIZE
));
1054 /* Get packet length. */
1055 len
= stream_get_endp(s
);
1057 /* Check packet length. */
1058 if (len
< (RIP_HEADER_SIZE
+ RIP_RTE_SIZE
)) {
1060 "rip_auth_md5_set(): packet length %ld is less than minimum length.",
1065 /* Set the digest offset length in the header */
1066 stream_putw_at(s
, doff
, len
);
1068 /* Set authentication data. */
1069 stream_putw(s
, RIP_FAMILY_AUTH
);
1070 stream_putw(s
, RIP_AUTH_DATA
);
1072 /* Generate a digest for the RIP packet. */
1073 memset(&ctx
, 0, sizeof(ctx
));
1075 MD5Update(&ctx
, STREAM_DATA(s
), stream_get_endp(s
));
1076 MD5Update(&ctx
, auth_str
, RIP_AUTH_MD5_SIZE
);
1077 MD5Final(digest
, &ctx
);
1079 /* Copy the digest to the packet. */
1080 stream_write(s
, digest
, RIP_AUTH_MD5_SIZE
);
1083 /* RIP routing information. */
1084 static void rip_response_process(struct rip_packet
*packet
, int size
,
1085 struct sockaddr_in
*from
,
1086 struct connected
*ifc
)
1090 struct prefix_ipv4 ifaddr
;
1091 struct prefix_ipv4 ifaddrclass
;
1094 memset(&ifaddr
, 0, sizeof(ifaddr
));
1095 /* We don't know yet. */
1098 /* The Response must be ignored if it is not from the RIP
1099 port. (RFC2453 - Sec. 3.9.2)*/
1100 if (from
->sin_port
!= htons(RIP_PORT_DEFAULT
)) {
1101 zlog_info("response doesn't come from RIP port: %d",
1103 rip_peer_bad_packet(from
);
1107 /* The datagram's IPv4 source address should be checked to see
1108 whether the datagram is from a valid neighbor; the source of the
1109 datagram must be on a directly connected network (RFC2453 - Sec.
1111 if (if_lookup_address((void *)&from
->sin_addr
, AF_INET
, VRF_DEFAULT
)
1114 "This datagram doesn't came from a valid neighbor: %s",
1115 inet_ntoa(from
->sin_addr
));
1116 rip_peer_bad_packet(from
);
1120 /* It is also worth checking to see whether the response is from one
1121 of the router's own addresses. */
1123 ; /* Alredy done in rip_read () */
1125 /* Update RIP peer. */
1126 rip_peer_update(from
, packet
->version
);
1128 /* Set RTE pointer. */
1131 for (lim
= (caddr_t
)packet
+ size
; (caddr_t
)rte
< lim
; rte
++) {
1132 /* RIPv2 authentication check. */
1133 /* If the Address Family Identifier of the first (and only the
1134 first) entry in the message is 0xFFFF, then the remainder of
1135 the entry contains the authentication. */
1136 /* If the packet gets here it means authentication enabled */
1137 /* Check is done in rip_read(). So, just skipping it */
1138 if (packet
->version
== RIPv2
&& rte
== packet
->rte
1139 && rte
->family
== htons(RIP_FAMILY_AUTH
))
1142 if (rte
->family
!= htons(AF_INET
)) {
1143 /* Address family check. RIP only supports AF_INET. */
1144 zlog_info("Unsupported family %d from %s.",
1146 inet_ntoa(from
->sin_addr
));
1150 /* - is the destination address valid (e.g., unicast; not net 0
1152 if (!rip_destination_check(rte
->prefix
)) {
1154 "Network is net 0 or net 127 or it is not unicast network");
1155 rip_peer_bad_route(from
);
1159 /* Convert metric value to host byte order. */
1160 rte
->metric
= ntohl(rte
->metric
);
1162 /* - is the metric valid (i.e., between 1 and 16, inclusive) */
1163 if (!(rte
->metric
>= 1 && rte
->metric
<= 16)) {
1164 zlog_info("Route's metric is not in the 1-16 range.");
1165 rip_peer_bad_route(from
);
1169 /* RIPv1 does not have nexthop value. */
1170 if (packet
->version
== RIPv1
&& rte
->nexthop
.s_addr
!= 0) {
1171 zlog_info("RIPv1 packet with nexthop value %s",
1172 inet_ntoa(rte
->nexthop
));
1173 rip_peer_bad_route(from
);
1177 /* That is, if the provided information is ignored, a possibly
1178 sub-optimal, but absolutely valid, route may be taken. If
1179 the received Next Hop is not directly reachable, it should be
1180 treated as 0.0.0.0. */
1181 if (packet
->version
== RIPv2
&& rte
->nexthop
.s_addr
!= 0) {
1184 /* Multicast address check. */
1185 addrval
= ntohl(rte
->nexthop
.s_addr
);
1186 if (IN_CLASSD(addrval
)) {
1188 "Nexthop %s is multicast address, skip this rte",
1189 inet_ntoa(rte
->nexthop
));
1193 if (!if_lookup_address((void *)&rte
->nexthop
, AF_INET
,
1195 struct route_node
*rn
;
1196 struct rip_info
*rinfo
;
1198 rn
= route_node_match_ipv4(rip
->table
,
1204 if (rinfo
->type
== ZEBRA_ROUTE_RIP
1207 if (IS_RIP_DEBUG_EVENT
)
1209 "Next hop %s is on RIP network. Set nexthop to the packet's originator",
1212 rte
->nexthop
= rinfo
->from
;
1214 if (IS_RIP_DEBUG_EVENT
)
1216 "Next hop %s is not directly reachable. Treat it as 0.0.0.0",
1219 rte
->nexthop
.s_addr
= 0;
1222 route_unlock_node(rn
);
1224 if (IS_RIP_DEBUG_EVENT
)
1226 "Next hop %s is not directly reachable. Treat it as 0.0.0.0",
1229 rte
->nexthop
.s_addr
= 0;
1234 /* For RIPv1, there won't be a valid netmask.
1236 This is a best guess at the masks. If everyone was using old
1237 Ciscos before the 'ip subnet zero' option, it would be almost
1240 Cisco summarize ripv1 advertisments to the classful boundary
1241 (/16 for class B's) except when the RIP packet does to inside
1242 the classful network in question. */
1244 if ((packet
->version
== RIPv1
&& rte
->prefix
.s_addr
!= 0)
1245 || (packet
->version
== RIPv2
1246 && (rte
->prefix
.s_addr
!= 0
1247 && rte
->mask
.s_addr
== 0))) {
1248 uint32_t destination
;
1250 if (subnetted
== -1) {
1251 memcpy(&ifaddr
, ifc
->address
,
1252 sizeof(struct prefix_ipv4
));
1253 memcpy(&ifaddrclass
, &ifaddr
,
1254 sizeof(struct prefix_ipv4
));
1255 apply_classful_mask_ipv4(&ifaddrclass
);
1257 if (ifaddr
.prefixlen
> ifaddrclass
.prefixlen
)
1261 destination
= ntohl(rte
->prefix
.s_addr
);
1263 if (IN_CLASSA(destination
))
1264 masklen2ip(8, &rte
->mask
);
1265 else if (IN_CLASSB(destination
))
1266 masklen2ip(16, &rte
->mask
);
1267 else if (IN_CLASSC(destination
))
1268 masklen2ip(24, &rte
->mask
);
1271 masklen2ip(ifaddrclass
.prefixlen
,
1272 (struct in_addr
*)&destination
);
1273 if ((subnetted
== 1)
1274 && ((rte
->prefix
.s_addr
& destination
)
1275 == ifaddrclass
.prefix
.s_addr
)) {
1276 masklen2ip(ifaddr
.prefixlen
, &rte
->mask
);
1277 if ((rte
->prefix
.s_addr
& rte
->mask
.s_addr
)
1278 != rte
->prefix
.s_addr
)
1279 masklen2ip(32, &rte
->mask
);
1280 if (IS_RIP_DEBUG_EVENT
)
1281 zlog_debug("Subnetted route %s",
1282 inet_ntoa(rte
->prefix
));
1284 if ((rte
->prefix
.s_addr
& rte
->mask
.s_addr
)
1285 != rte
->prefix
.s_addr
)
1289 if (IS_RIP_DEBUG_EVENT
) {
1290 zlog_debug("Resultant route %s",
1291 inet_ntoa(rte
->prefix
));
1292 zlog_debug("Resultant mask %s",
1293 inet_ntoa(rte
->mask
));
1297 /* In case of RIPv2, if prefix in RTE is not netmask applied one
1298 ignore the entry. */
1299 if ((packet
->version
== RIPv2
) && (rte
->mask
.s_addr
!= 0)
1300 && ((rte
->prefix
.s_addr
& rte
->mask
.s_addr
)
1301 != rte
->prefix
.s_addr
)) {
1303 "RIPv2 address %s is not mask /%d applied one",
1304 inet_ntoa(rte
->prefix
), ip_masklen(rte
->mask
));
1305 rip_peer_bad_route(from
);
1309 /* Default route's netmask is ignored. */
1310 if (packet
->version
== RIPv2
&& (rte
->prefix
.s_addr
== 0)
1311 && (rte
->mask
.s_addr
!= 0)) {
1312 if (IS_RIP_DEBUG_EVENT
)
1314 "Default route with non-zero netmask. Set zero to netmask");
1315 rte
->mask
.s_addr
= 0;
1318 /* Routing table updates. */
1319 rip_rte_process(rte
, from
, ifc
->ifp
);
1323 /* Make socket for RIP protocol. */
1324 static int rip_create_socket(void)
1328 struct sockaddr_in addr
;
1330 memset(&addr
, 0, sizeof(struct sockaddr_in
));
1331 addr
.sin_family
= AF_INET
;
1332 addr
.sin_addr
.s_addr
= INADDR_ANY
;
1333 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1334 addr
.sin_len
= sizeof(struct sockaddr_in
);
1335 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1336 /* sending port must always be the RIP port */
1337 addr
.sin_port
= htons(RIP_PORT_DEFAULT
);
1339 /* Make datagram socket. */
1340 sock
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
1342 zlog_err("Cannot create UDP socket: %s", safe_strerror(errno
));
1346 sockopt_broadcast(sock
);
1347 sockopt_reuseaddr(sock
);
1348 sockopt_reuseport(sock
);
1349 setsockopt_ipv4_multicast_loop(sock
, 0);
1351 setsockopt_pktinfo(sock
);
1352 #endif /* RIP_RECVMSG */
1353 #ifdef IPTOS_PREC_INTERNETCONTROL
1354 setsockopt_ipv4_tos(sock
, IPTOS_PREC_INTERNETCONTROL
);
1357 if (ripd_privs
.change(ZPRIVS_RAISE
))
1358 zlog_err("rip_create_socket: could not raise privs");
1359 setsockopt_so_recvbuf(sock
, RIP_UDP_RCV_BUF
);
1360 if ((ret
= bind(sock
, (struct sockaddr
*)&addr
, sizeof(addr
))) < 0)
1363 int save_errno
= errno
;
1364 if (ripd_privs
.change(ZPRIVS_LOWER
))
1365 zlog_err("rip_create_socket: could not lower privs");
1367 zlog_err("%s: Can't bind socket %d to %s port %d: %s", __func__
,
1368 sock
, inet_ntoa(addr
.sin_addr
),
1369 (int)ntohs(addr
.sin_port
), safe_strerror(save_errno
));
1375 if (ripd_privs
.change(ZPRIVS_LOWER
))
1376 zlog_err("rip_create_socket: could not lower privs");
1381 /* RIP packet send to destination address, on interface denoted by
1382 * by connected argument. NULL to argument denotes destination should be
1383 * should be RIP multicast group
1385 static int rip_send_packet(uint8_t *buf
, int size
, struct sockaddr_in
*to
,
1386 struct connected
*ifc
)
1389 struct sockaddr_in sin
;
1391 assert(ifc
!= NULL
);
1393 if (IS_RIP_DEBUG_PACKET
) {
1394 #define ADDRESS_SIZE 20
1395 char dst
[ADDRESS_SIZE
];
1396 dst
[ADDRESS_SIZE
- 1] = '\0';
1399 strncpy(dst
, inet_ntoa(to
->sin_addr
), ADDRESS_SIZE
- 1);
1401 sin
.sin_addr
.s_addr
= htonl(INADDR_RIP_GROUP
);
1402 strncpy(dst
, inet_ntoa(sin
.sin_addr
), ADDRESS_SIZE
- 1);
1405 zlog_debug("rip_send_packet %s > %s (%s)",
1406 inet_ntoa(ifc
->address
->u
.prefix4
), dst
,
1410 if (CHECK_FLAG(ifc
->flags
, ZEBRA_IFA_SECONDARY
)) {
1412 * ZEBRA_IFA_SECONDARY is set on linux when an interface is
1414 * with multiple addresses on the same subnet: the first address
1415 * on the subnet is configured "primary", and all subsequent
1417 * on that subnet are treated as "secondary" addresses.
1418 * In order to avoid routing-table bloat on other rip listeners,
1419 * we do not send out RIP packets with ZEBRA_IFA_SECONDARY
1421 * XXX Since Linux is the only system for which the
1422 * ZEBRA_IFA_SECONDARY
1423 * flag is set, we would end up sending a packet for a
1425 * source address on non-linux systems.
1427 if (IS_RIP_DEBUG_PACKET
)
1428 zlog_debug("duplicate dropped");
1432 /* Make destination address. */
1433 memset(&sin
, 0, sizeof(struct sockaddr_in
));
1434 sin
.sin_family
= AF_INET
;
1435 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1436 sin
.sin_len
= sizeof(struct sockaddr_in
);
1437 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1439 /* When destination is specified, use it's port and address. */
1441 sin
.sin_port
= to
->sin_port
;
1442 sin
.sin_addr
= to
->sin_addr
;
1444 sin
.sin_port
= htons(RIP_PORT_DEFAULT
);
1445 sin
.sin_addr
.s_addr
= htonl(INADDR_RIP_GROUP
);
1447 rip_interface_multicast_set(rip
->sock
, ifc
);
1450 ret
= sendto(rip
->sock
, buf
, size
, 0, (struct sockaddr
*)&sin
,
1451 sizeof(struct sockaddr_in
));
1453 if (IS_RIP_DEBUG_EVENT
)
1454 zlog_debug("SEND to %s.%d", inet_ntoa(sin
.sin_addr
),
1455 ntohs(sin
.sin_port
));
1458 zlog_warn("can't send packet : %s", safe_strerror(errno
));
1463 /* Add redistributed route to RIP table. */
1464 void rip_redistribute_add(int type
, int sub_type
, struct prefix_ipv4
*p
,
1465 struct nexthop
*nh
, unsigned int metric
,
1466 unsigned char distance
, route_tag_t tag
)
1469 struct route_node
*rp
= NULL
;
1470 struct rip_info
*rinfo
= NULL
, newinfo
;
1471 struct list
*list
= NULL
;
1473 /* Redistribute route */
1474 ret
= rip_destination_check(p
->prefix
);
1478 rp
= route_node_get(rip
->table
, (struct prefix
*)p
);
1480 memset(&newinfo
, 0, sizeof(struct rip_info
));
1481 newinfo
.type
= type
;
1482 newinfo
.sub_type
= sub_type
;
1484 newinfo
.external_metric
= metric
;
1485 newinfo
.distance
= distance
;
1486 if (tag
<= UINT16_MAX
) /* RIP only supports 16 bit tags */
1491 if ((list
= rp
->info
) != NULL
&& listcount(list
) != 0) {
1492 rinfo
= listgetdata(listhead(list
));
1494 if (rinfo
->type
== ZEBRA_ROUTE_CONNECT
1495 && rinfo
->sub_type
== RIP_ROUTE_INTERFACE
1496 && rinfo
->metric
!= RIP_METRIC_INFINITY
) {
1497 route_unlock_node(rp
);
1501 /* Manually configured RIP route check. */
1502 if (rinfo
->type
== ZEBRA_ROUTE_RIP
1503 && ((rinfo
->sub_type
== RIP_ROUTE_STATIC
)
1504 || (rinfo
->sub_type
== RIP_ROUTE_DEFAULT
))) {
1505 if (type
!= ZEBRA_ROUTE_RIP
1506 || ((sub_type
!= RIP_ROUTE_STATIC
)
1507 && (sub_type
!= RIP_ROUTE_DEFAULT
))) {
1508 route_unlock_node(rp
);
1513 (void)rip_ecmp_replace(&newinfo
);
1514 route_unlock_node(rp
);
1516 (void)rip_ecmp_add(&newinfo
);
1518 if (IS_RIP_DEBUG_EVENT
) {
1519 zlog_debug("Redistribute new prefix %s/%d",
1520 inet_ntoa(p
->prefix
), p
->prefixlen
);
1523 rip_event(RIP_TRIGGERED_UPDATE
, 0);
1526 /* Delete redistributed route from RIP table. */
1527 void rip_redistribute_delete(int type
, int sub_type
, struct prefix_ipv4
*p
,
1531 struct route_node
*rp
;
1532 struct rip_info
*rinfo
;
1534 ret
= rip_destination_check(p
->prefix
);
1538 rp
= route_node_lookup(rip
->table
, (struct prefix
*)p
);
1540 struct list
*list
= rp
->info
;
1542 if (list
!= NULL
&& listcount(list
) != 0) {
1543 rinfo
= listgetdata(listhead(list
));
1544 if (rinfo
!= NULL
&& rinfo
->type
== type
1545 && rinfo
->sub_type
== sub_type
1546 && rinfo
->nh
.ifindex
== ifindex
) {
1547 /* Perform poisoned reverse. */
1548 rinfo
->metric
= RIP_METRIC_INFINITY
;
1549 RIP_TIMER_ON(rinfo
->t_garbage_collect
,
1550 rip_garbage_collect
,
1552 RIP_TIMER_OFF(rinfo
->t_timeout
);
1553 rinfo
->flags
|= RIP_RTF_CHANGED
;
1555 if (IS_RIP_DEBUG_EVENT
)
1557 "Poison %s/%d on the interface %s with an "
1558 "infinity metric [delete]",
1559 inet_ntoa(p
->prefix
),
1561 ifindex2ifname(ifindex
,
1564 rip_event(RIP_TRIGGERED_UPDATE
, 0);
1567 route_unlock_node(rp
);
1571 /* Response to request called from rip_read ().*/
1572 static void rip_request_process(struct rip_packet
*packet
, int size
,
1573 struct sockaddr_in
*from
, struct connected
*ifc
)
1577 struct prefix_ipv4 p
;
1578 struct route_node
*rp
;
1579 struct rip_info
*rinfo
;
1580 struct rip_interface
*ri
;
1582 /* Does not reponse to the requests on the loopback interfaces */
1583 if (if_is_loopback(ifc
->ifp
))
1586 /* Check RIP process is enabled on this interface. */
1587 ri
= ifc
->ifp
->info
;
1591 /* When passive interface is specified, suppress responses */
1595 /* RIP peer update. */
1596 rip_peer_update(from
, packet
->version
);
1598 lim
= ((caddr_t
)packet
) + size
;
1601 /* The Request is processed entry by entry. If there are no
1602 entries, no response is given. */
1603 if (lim
== (caddr_t
)rte
)
1606 /* There is one special case. If there is exactly one entry in the
1607 request, and it has an address family identifier of zero and a
1608 metric of infinity (i.e., 16), then this is a request to send the
1609 entire routing table. */
1610 if (lim
== ((caddr_t
)(rte
+ 1)) && ntohs(rte
->family
) == 0
1611 && ntohl(rte
->metric
) == RIP_METRIC_INFINITY
) {
1612 /* All route with split horizon */
1613 rip_output_process(ifc
, from
, rip_all_route
, packet
->version
);
1615 if (ntohs(rte
->family
) != AF_INET
)
1618 /* Examine the list of RTEs in the Request one by one. For each
1619 entry, look up the destination in the router's routing
1620 database and, if there is a route, put that route's metric in
1621 the metric field of the RTE. If there is no explicit route
1622 to the specified destination, put infinity in the metric
1623 field. Once all the entries have been filled in, change the
1624 command from Request to Response and send the datagram back
1625 to the requestor. */
1628 for (; ((caddr_t
)rte
) < lim
; rte
++) {
1629 p
.prefix
= rte
->prefix
;
1630 p
.prefixlen
= ip_masklen(rte
->mask
);
1631 apply_mask_ipv4(&p
);
1633 rp
= route_node_lookup(rip
->table
, (struct prefix
*)&p
);
1635 rinfo
= listgetdata(
1636 listhead((struct list
*)rp
->info
));
1637 rte
->metric
= htonl(rinfo
->metric
);
1638 route_unlock_node(rp
);
1640 rte
->metric
= htonl(RIP_METRIC_INFINITY
);
1642 packet
->command
= RIP_RESPONSE
;
1644 (void)rip_send_packet((uint8_t *)packet
, size
, from
, ifc
);
1646 rip_global_queries
++;
1650 /* Set IPv6 packet info to the socket. */
1651 static int setsockopt_pktinfo(int sock
)
1656 ret
= setsockopt(sock
, IPPROTO_IP
, IP_PKTINFO
, &val
, sizeof(val
));
1658 zlog_warn("Can't setsockopt IP_PKTINFO : %s",
1659 safe_strerror(errno
));
1663 /* Read RIP packet by recvmsg function. */
1664 int rip_recvmsg(int sock
, uint8_t *buf
, int size
, struct sockaddr_in
*from
,
1670 struct cmsghdr
*ptr
;
1673 memset(&msg
, 0, sizeof(msg
));
1674 msg
.msg_name
= (void *)from
;
1675 msg
.msg_namelen
= sizeof(struct sockaddr_in
);
1678 msg
.msg_control
= (void *)adata
;
1679 msg
.msg_controllen
= sizeof adata
;
1683 ret
= recvmsg(sock
, &msg
, 0);
1687 for (ptr
= ZCMSG_FIRSTHDR(&msg
); ptr
!= NULL
;
1688 ptr
= CMSG_NXTHDR(&msg
, ptr
))
1689 if (ptr
->cmsg_level
== IPPROTO_IP
1690 && ptr
->cmsg_type
== IP_PKTINFO
) {
1691 struct in_pktinfo
*pktinfo
;
1694 pktinfo
= (struct in_pktinfo
*)CMSG_DATA(ptr
);
1695 i
= pktinfo
->ipi_ifindex
;
1700 /* RIP packet read function. */
1701 int rip_read_new(struct thread
*t
)
1705 char buf
[RIP_PACKET_MAXSIZ
];
1706 struct sockaddr_in from
;
1709 /* Fetch socket then register myself. */
1710 sock
= THREAD_FD(t
);
1711 rip_event(RIP_READ
, sock
);
1713 /* Read RIP packet. */
1714 ret
= rip_recvmsg(sock
, buf
, RIP_PACKET_MAXSIZ
, &from
, (int *)&ifindex
);
1716 zlog_warn("Can't read RIP packet: %s", safe_strerror(errno
));
1722 #endif /* RIP_RECVMSG */
1724 /* First entry point of RIP packet. */
1725 static int rip_read(struct thread
*t
)
1730 union rip_buf rip_buf
;
1731 struct rip_packet
*packet
;
1732 struct sockaddr_in from
;
1736 struct interface
*ifp
= NULL
;
1737 struct connected
*ifc
;
1738 struct rip_interface
*ri
;
1741 /* Fetch socket then register myself. */
1742 sock
= THREAD_FD(t
);
1745 /* Add myself to tne next event */
1746 rip_event(RIP_READ
, sock
);
1748 /* RIPd manages only IPv4. */
1749 memset(&from
, 0, sizeof(struct sockaddr_in
));
1750 fromlen
= sizeof(struct sockaddr_in
);
1752 len
= recvfrom(sock
, (char *)&rip_buf
.buf
, sizeof(rip_buf
.buf
), 0,
1753 (struct sockaddr
*)&from
, &fromlen
);
1755 zlog_info("recvfrom failed: %s", safe_strerror(errno
));
1759 /* Check is this packet comming from myself? */
1760 if (if_check_address(from
.sin_addr
)) {
1761 if (IS_RIP_DEBUG_PACKET
)
1762 zlog_debug("ignore packet comes from myself");
1766 /* Which interface is this packet comes from. */
1767 ifc
= if_lookup_address((void *)&from
.sin_addr
, AF_INET
, VRF_DEFAULT
);
1771 /* RIP packet received */
1772 if (IS_RIP_DEBUG_EVENT
)
1773 zlog_debug("RECV packet from %s port %d on %s",
1774 inet_ntoa(from
.sin_addr
), ntohs(from
.sin_port
),
1775 ifp
? ifp
->name
: "unknown");
1777 /* If this packet come from unknown interface, ignore it. */
1780 "rip_read: cannot find interface for packet from %s port %d",
1781 inet_ntoa(from
.sin_addr
), ntohs(from
.sin_port
));
1786 p
.u
.prefix4
= from
.sin_addr
;
1787 p
.prefixlen
= IPV4_MAX_BITLEN
;
1789 ifc
= connected_lookup_prefix(ifp
, &p
);
1793 "rip_read: cannot find connected address for packet from %s "
1794 "port %d on interface %s",
1795 inet_ntoa(from
.sin_addr
), ntohs(from
.sin_port
),
1800 /* Packet length check. */
1801 if (len
< RIP_PACKET_MINSIZ
) {
1802 zlog_warn("packet size %d is smaller than minimum size %d", len
,
1804 rip_peer_bad_packet(&from
);
1807 if (len
> RIP_PACKET_MAXSIZ
) {
1808 zlog_warn("packet size %d is larger than max size %d", len
,
1810 rip_peer_bad_packet(&from
);
1814 /* Packet alignment check. */
1815 if ((len
- RIP_PACKET_MINSIZ
) % 20) {
1816 zlog_warn("packet size %d is wrong for RIP packet alignment",
1818 rip_peer_bad_packet(&from
);
1822 /* Set RTE number. */
1823 rtenum
= ((len
- RIP_PACKET_MINSIZ
) / 20);
1825 /* For easy to handle. */
1826 packet
= &rip_buf
.rip_packet
;
1828 /* RIP version check. */
1829 if (packet
->version
== 0) {
1830 zlog_info("version 0 with command %d received.",
1832 rip_peer_bad_packet(&from
);
1836 /* Dump RIP packet. */
1837 if (IS_RIP_DEBUG_RECV
)
1838 rip_packet_dump(packet
, len
, "RECV");
1840 /* RIP version adjust. This code should rethink now. RFC1058 says
1841 that "Version 1 implementations are to ignore this extra data and
1842 process only the fields specified in this document.". So RIPv3
1843 packet should be treated as RIPv1 ignoring must be zero field. */
1844 if (packet
->version
> RIPv2
)
1845 packet
->version
= RIPv2
;
1847 /* Is RIP running or is this RIP neighbor ?*/
1849 if (!ri
->running
&& !rip_neighbor_lookup(&from
)) {
1850 if (IS_RIP_DEBUG_EVENT
)
1851 zlog_debug("RIP is not enabled on interface %s.",
1853 rip_peer_bad_packet(&from
);
1857 /* RIP Version check. RFC2453, 4.6 and 5.1 */
1858 vrecv
= ((ri
->ri_receive
== RI_RIP_UNSPEC
) ? rip
->version_recv
1860 if (vrecv
== RI_RIP_VERSION_NONE
1861 || ((packet
->version
== RIPv1
) && !(vrecv
& RIPv1
))
1862 || ((packet
->version
== RIPv2
) && !(vrecv
& RIPv2
))) {
1863 if (IS_RIP_DEBUG_PACKET
)
1865 " packet's v%d doesn't fit to if version spec",
1867 rip_peer_bad_packet(&from
);
1871 /* RFC2453 5.2 If the router is not configured to authenticate RIP-2
1872 messages, then RIP-1 and unauthenticated RIP-2 messages will be
1873 accepted; authenticated RIP-2 messages shall be discarded. */
1874 if ((ri
->auth_type
== RIP_NO_AUTH
) && rtenum
1875 && (packet
->version
== RIPv2
)
1876 && (packet
->rte
->family
== htons(RIP_FAMILY_AUTH
))) {
1877 if (IS_RIP_DEBUG_EVENT
)
1879 "packet RIPv%d is dropped because authentication disabled",
1881 rip_peer_bad_packet(&from
);
1886 If the router is configured to authenticate RIP-2 messages, then
1887 RIP-1 messages and RIP-2 messages which pass authentication
1888 testing shall be accepted; unauthenticated and failed
1889 authentication RIP-2 messages shall be discarded. For maximum
1890 security, RIP-1 messages should be ignored when authentication is
1891 in use (see section 4.1); otherwise, the routing information from
1892 authenticated messages will be propagated by RIP-1 routers in an
1893 unauthenticated manner.
1895 /* We make an exception for RIPv1 REQUEST packets, to which we'll
1896 * always reply regardless of authentication settings, because:
1898 * - if there other authorised routers on-link, the REQUESTor can
1899 * passively obtain the routing updates anyway
1900 * - if there are no other authorised routers on-link, RIP can
1901 * easily be disabled for the link to prevent giving out information
1902 * on state of this routers RIP routing table..
1904 * I.e. if RIPv1 has any place anymore these days, it's as a very
1905 * simple way to distribute routing information (e.g. to embedded
1906 * hosts / appliances) and the ability to give out RIPv1
1907 * routing-information freely, while still requiring RIPv2
1908 * authentication for any RESPONSEs might be vaguely useful.
1910 if (ri
->auth_type
!= RIP_NO_AUTH
&& packet
->version
== RIPv1
) {
1911 /* Discard RIPv1 messages other than REQUESTs */
1912 if (packet
->command
!= RIP_REQUEST
) {
1913 if (IS_RIP_DEBUG_PACKET
)
1916 " dropped because authentication enabled");
1917 rip_peer_bad_packet(&from
);
1920 } else if (ri
->auth_type
!= RIP_NO_AUTH
) {
1921 const char *auth_desc
;
1924 /* There definitely is no authentication in the packet.
1926 if (IS_RIP_DEBUG_PACKET
)
1928 "RIPv2 authentication failed: no auth RTE in packet");
1929 rip_peer_bad_packet(&from
);
1933 /* First RTE must be an Authentication Family RTE */
1934 if (packet
->rte
->family
!= htons(RIP_FAMILY_AUTH
)) {
1935 if (IS_RIP_DEBUG_PACKET
)
1938 " dropped because authentication enabled");
1939 rip_peer_bad_packet(&from
);
1943 /* Check RIPv2 authentication. */
1944 switch (ntohs(packet
->rte
->tag
)) {
1945 case RIP_AUTH_SIMPLE_PASSWORD
:
1946 auth_desc
= "simple";
1947 ret
= rip_auth_simple_password(packet
->rte
, &from
, ifp
);
1952 ret
= rip_auth_md5(packet
, &from
, len
, ifp
);
1953 /* Reset RIP packet length to trim MD5 data. */
1959 auth_desc
= "unknown type";
1960 if (IS_RIP_DEBUG_PACKET
)
1962 "RIPv2 Unknown authentication type %d",
1963 ntohs(packet
->rte
->tag
));
1967 if (IS_RIP_DEBUG_PACKET
)
1968 zlog_debug("RIPv2 %s authentication success",
1971 if (IS_RIP_DEBUG_PACKET
)
1972 zlog_debug("RIPv2 %s authentication failure",
1974 rip_peer_bad_packet(&from
);
1979 /* Process each command. */
1980 switch (packet
->command
) {
1982 rip_response_process(packet
, len
, &from
, ifc
);
1986 rip_request_process(packet
, len
, &from
, ifc
);
1991 "Obsolete command %s received, please sent it to routed",
1992 lookup_msg(rip_msg
, packet
->command
, NULL
));
1993 rip_peer_bad_packet(&from
);
1995 case RIP_POLL_ENTRY
:
1996 zlog_info("Obsolete command %s received",
1997 lookup_msg(rip_msg
, packet
->command
, NULL
));
1998 rip_peer_bad_packet(&from
);
2001 zlog_info("Unknown RIP command %d received", packet
->command
);
2002 rip_peer_bad_packet(&from
);
2009 /* Write routing table entry to the stream and return next index of
2010 the routing table entry in the stream. */
2011 static int rip_write_rte(int num
, struct stream
*s
, struct prefix_ipv4
*p
,
2012 uint8_t version
, struct rip_info
*rinfo
)
2014 struct in_addr mask
;
2016 /* Write routing table entry. */
2017 if (version
== RIPv1
) {
2018 stream_putw(s
, AF_INET
);
2020 stream_put_ipv4(s
, p
->prefix
.s_addr
);
2021 stream_put_ipv4(s
, 0);
2022 stream_put_ipv4(s
, 0);
2023 stream_putl(s
, rinfo
->metric_out
);
2025 masklen2ip(p
->prefixlen
, &mask
);
2027 stream_putw(s
, AF_INET
);
2028 stream_putw(s
, rinfo
->tag_out
);
2029 stream_put_ipv4(s
, p
->prefix
.s_addr
);
2030 stream_put_ipv4(s
, mask
.s_addr
);
2031 stream_put_ipv4(s
, rinfo
->nexthop_out
.s_addr
);
2032 stream_putl(s
, rinfo
->metric_out
);
2038 /* Send update to the ifp or spcified neighbor. */
2039 void rip_output_process(struct connected
*ifc
, struct sockaddr_in
*to
,
2040 int route_type
, uint8_t version
)
2044 struct route_node
*rp
;
2045 struct rip_info
*rinfo
;
2046 struct rip_interface
*ri
;
2047 struct prefix_ipv4
*p
;
2048 struct prefix_ipv4 classfull
;
2049 struct prefix_ipv4 ifaddrclass
;
2050 struct key
*key
= NULL
;
2051 /* this might need to made dynamic if RIP ever supported auth methods
2052 with larger key string sizes */
2053 char auth_str
[RIP_AUTH_SIMPLE_SIZE
];
2054 size_t doff
= 0; /* offset of digest offset field */
2058 struct list
*list
= NULL
;
2059 struct listnode
*listnode
= NULL
;
2061 /* Logging output event. */
2062 if (IS_RIP_DEBUG_EVENT
) {
2064 zlog_debug("update routes to neighbor %s",
2065 inet_ntoa(to
->sin_addr
));
2067 zlog_debug("update routes on interface %s ifindex %d",
2068 ifc
->ifp
->name
, ifc
->ifp
->ifindex
);
2071 /* Set output stream. */
2074 /* Reset stream and RTE counter. */
2076 rtemax
= RIP_MAX_RTE
;
2078 /* Get RIP interface. */
2079 ri
= ifc
->ifp
->info
;
2081 /* If output interface is in simple password authentication mode, we
2082 need space for authentication data. */
2083 if (ri
->auth_type
== RIP_AUTH_SIMPLE_PASSWORD
)
2086 /* If output interface is in MD5 authentication mode, we need space
2087 for authentication header and data. */
2088 if (ri
->auth_type
== RIP_AUTH_MD5
)
2091 /* If output interface is in simple password authentication mode
2092 and string or keychain is specified we need space for auth. data */
2093 if (ri
->auth_type
!= RIP_NO_AUTH
) {
2094 if (ri
->key_chain
) {
2095 struct keychain
*keychain
;
2097 keychain
= keychain_lookup(ri
->key_chain
);
2099 key
= key_lookup_for_send(keychain
);
2101 /* to be passed to auth functions later */
2102 rip_auth_prepare_str_send(ri
, key
, auth_str
,
2103 RIP_AUTH_SIMPLE_SIZE
);
2104 if (strlen(auth_str
) == 0)
2108 if (version
== RIPv1
) {
2109 memcpy(&ifaddrclass
, ifc
->address
, sizeof(struct prefix_ipv4
));
2110 apply_classful_mask_ipv4(&ifaddrclass
);
2112 if (ifc
->address
->prefixlen
> ifaddrclass
.prefixlen
)
2116 for (rp
= route_top(rip
->table
); rp
; rp
= route_next(rp
))
2117 if ((list
= rp
->info
) != NULL
&& listcount(list
) != 0) {
2118 rinfo
= listgetdata(listhead(list
));
2119 /* For RIPv1, if we are subnetted, output subnets in our
2121 /* that have the same mask as the output "interface".
2123 /* networks, only the classfull version is output. */
2125 if (version
== RIPv1
) {
2126 p
= (struct prefix_ipv4
*)&rp
->p
;
2128 if (IS_RIP_DEBUG_PACKET
)
2130 "RIPv1 mask check, %s/%d considered for output",
2131 inet_ntoa(rp
->p
.u
.prefix4
),
2136 (struct prefix
*)&ifaddrclass
,
2138 if ((ifc
->address
->prefixlen
2140 && (rp
->p
.prefixlen
!= 32))
2143 memcpy(&classfull
, &rp
->p
,
2144 sizeof(struct prefix_ipv4
));
2145 apply_classful_mask_ipv4(&classfull
);
2146 if (rp
->p
.u
.prefix4
.s_addr
!= 0
2147 && classfull
.prefixlen
2151 if (IS_RIP_DEBUG_PACKET
)
2153 "RIPv1 mask check, %s/%d made it through",
2154 inet_ntoa(rp
->p
.u
.prefix4
),
2157 p
= (struct prefix_ipv4
*)&rp
->p
;
2159 /* Apply output filters. */
2160 ret
= rip_filter(RIP_FILTER_OUT
, p
, ri
);
2164 /* Changed route only output. */
2165 if (route_type
== rip_changed_route
2166 && (!(rinfo
->flags
& RIP_RTF_CHANGED
)))
2169 /* Split horizon. */
2170 /* if (split_horizon == rip_split_horizon) */
2171 if (ri
->split_horizon
== RIP_SPLIT_HORIZON
) {
2173 * We perform split horizon for RIP and
2175 * For rip routes, we want to suppress the route
2177 * end up sending the route back on the
2179 * learned it from, with a higher metric. For
2181 * we suppress the route if the prefix is a
2183 * source address that we are going to use for
2185 * (in order to handle the case when multiple
2187 * configured on the same interface).
2190 struct rip_info
*tmp_rinfo
= NULL
;
2191 struct connected
*tmp_ifc
= NULL
;
2193 for (ALL_LIST_ELEMENTS_RO(list
, listnode
,
2195 if (tmp_rinfo
->type
== ZEBRA_ROUTE_RIP
2196 && tmp_rinfo
->nh
.ifindex
2197 == ifc
->ifp
->ifindex
) {
2203 && rinfo
->type
== ZEBRA_ROUTE_CONNECT
) {
2204 for (ALL_LIST_ELEMENTS_RO(
2205 ifc
->ifp
->connected
,
2209 tmp_ifc
->address
)) {
2219 /* Preparation for route-map. */
2220 rinfo
->metric_set
= 0;
2221 rinfo
->nexthop_out
.s_addr
= 0;
2222 rinfo
->metric_out
= rinfo
->metric
;
2223 rinfo
->tag_out
= rinfo
->tag
;
2224 rinfo
->ifindex_out
= ifc
->ifp
->ifindex
;
2226 /* In order to avoid some local loops,
2227 * if the RIP route has a nexthop via this interface,
2229 * otherwise set it to 0. The nexthop should not be
2231 * beyond the local broadcast/multicast area in order
2232 * to avoid an IGP multi-level recursive look-up.
2235 if (rinfo
->nh
.ifindex
== ifc
->ifp
->ifindex
)
2236 rinfo
->nexthop_out
= rinfo
->nh
.gate
.ipv4
;
2238 /* Interface route-map */
2239 if (ri
->routemap
[RIP_FILTER_OUT
]) {
2240 ret
= route_map_apply(
2241 ri
->routemap
[RIP_FILTER_OUT
],
2242 (struct prefix
*)p
, RMAP_RIP
, rinfo
);
2244 if (ret
== RMAP_DENYMATCH
) {
2245 if (IS_RIP_DEBUG_PACKET
)
2247 "RIP %s/%d is filtered by route-map out",
2248 inet_ntoa(p
->prefix
),
2254 /* Apply redistribute route map - continue, if deny */
2255 if (rip
->route_map
[rinfo
->type
].name
2256 && rinfo
->sub_type
!= RIP_ROUTE_INTERFACE
) {
2257 ret
= route_map_apply(
2258 rip
->route_map
[rinfo
->type
].map
,
2259 (struct prefix
*)p
, RMAP_RIP
, rinfo
);
2261 if (ret
== RMAP_DENYMATCH
) {
2262 if (IS_RIP_DEBUG_PACKET
)
2264 "%s/%d is filtered by route-map",
2265 inet_ntoa(p
->prefix
),
2271 /* When route-map does not set metric. */
2272 if (!rinfo
->metric_set
) {
2273 /* If redistribute metric is set. */
2274 if (rip
->route_map
[rinfo
->type
].metric_config
2275 && rinfo
->metric
!= RIP_METRIC_INFINITY
) {
2277 rip
->route_map
[rinfo
->type
]
2280 /* If the route is not connected or
2282 one, use default-metric value*/
2283 if (rinfo
->type
!= ZEBRA_ROUTE_RIP
2285 != ZEBRA_ROUTE_CONNECT
2287 != RIP_METRIC_INFINITY
)
2289 rip
->default_metric
;
2293 /* Apply offset-list */
2294 if (rinfo
->metric
!= RIP_METRIC_INFINITY
)
2295 rip_offset_list_apply_out(p
, ifc
->ifp
,
2296 &rinfo
->metric_out
);
2298 if (rinfo
->metric_out
> RIP_METRIC_INFINITY
)
2299 rinfo
->metric_out
= RIP_METRIC_INFINITY
;
2301 /* Perform split-horizon with poisoned reverse
2302 * for RIP and connected routes.
2304 if (ri
->split_horizon
2305 == RIP_SPLIT_HORIZON_POISONED_REVERSE
) {
2307 * We perform split horizon for RIP and
2309 * For rip routes, we want to suppress the route
2311 * end up sending the route back on the
2313 * learned it from, with a higher metric. For
2315 * we suppress the route if the prefix is a
2317 * source address that we are going to use for
2319 * (in order to handle the case when multiple
2321 * configured on the same interface).
2323 struct rip_info
*tmp_rinfo
= NULL
;
2324 struct connected
*tmp_ifc
= NULL
;
2326 for (ALL_LIST_ELEMENTS_RO(list
, listnode
,
2328 if (tmp_rinfo
->type
== ZEBRA_ROUTE_RIP
2329 && tmp_rinfo
->nh
.ifindex
2330 == ifc
->ifp
->ifindex
)
2332 RIP_METRIC_INFINITY
;
2334 if (rinfo
->metric_out
!= RIP_METRIC_INFINITY
2335 && rinfo
->type
== ZEBRA_ROUTE_CONNECT
) {
2336 for (ALL_LIST_ELEMENTS_RO(
2337 ifc
->ifp
->connected
,
2341 tmp_ifc
->address
)) {
2343 RIP_METRIC_INFINITY
;
2349 /* Prepare preamble, auth headers, if needs be */
2351 stream_putc(s
, RIP_RESPONSE
);
2352 stream_putc(s
, version
);
2355 /* auth header for !v1 && !no_auth */
2356 if ((ri
->auth_type
!= RIP_NO_AUTH
)
2357 && (version
!= RIPv1
))
2358 doff
= rip_auth_header_write(
2359 s
, ri
, key
, auth_str
,
2360 RIP_AUTH_SIMPLE_SIZE
);
2363 /* Write RTE to the stream. */
2364 num
= rip_write_rte(num
, s
, p
, version
, rinfo
);
2365 if (num
== rtemax
) {
2366 if (version
== RIPv2
2367 && ri
->auth_type
== RIP_AUTH_MD5
)
2368 rip_auth_md5_set(s
, ri
, doff
, auth_str
,
2369 RIP_AUTH_SIMPLE_SIZE
);
2371 ret
= rip_send_packet(STREAM_DATA(s
),
2372 stream_get_endp(s
), to
,
2375 if (ret
>= 0 && IS_RIP_DEBUG_SEND
)
2376 rip_packet_dump((struct rip_packet
*)
2385 /* Flush unwritten RTE. */
2387 if (version
== RIPv2
&& ri
->auth_type
== RIP_AUTH_MD5
)
2388 rip_auth_md5_set(s
, ri
, doff
, auth_str
,
2389 RIP_AUTH_SIMPLE_SIZE
);
2391 ret
= rip_send_packet(STREAM_DATA(s
), stream_get_endp(s
), to
,
2394 if (ret
>= 0 && IS_RIP_DEBUG_SEND
)
2395 rip_packet_dump((struct rip_packet
*)STREAM_DATA(s
),
2396 stream_get_endp(s
), "SEND");
2400 /* Statistics updates. */
2404 /* Send RIP packet to the interface. */
2405 static void rip_update_interface(struct connected
*ifc
, uint8_t version
,
2408 struct interface
*ifp
= ifc
->ifp
;
2409 struct rip_interface
*ri
= ifp
->info
;
2410 struct sockaddr_in to
;
2412 /* When RIP version is 2 and multicast enable interface. */
2413 if (version
== RIPv2
&& !ri
->v2_broadcast
&& if_is_multicast(ifp
)) {
2414 if (IS_RIP_DEBUG_EVENT
)
2415 zlog_debug("multicast announce on %s ", ifp
->name
);
2417 rip_output_process(ifc
, NULL
, route_type
, version
);
2421 /* If we can't send multicast packet, send it with unicast. */
2422 if (if_is_broadcast(ifp
) || if_is_pointopoint(ifp
)) {
2423 if (ifc
->address
->family
== AF_INET
) {
2424 /* Destination address and port setting. */
2425 memset(&to
, 0, sizeof(struct sockaddr_in
));
2426 if (ifc
->destination
)
2427 /* use specified broadcast or peer destination
2429 to
.sin_addr
= ifc
->destination
->u
.prefix4
;
2430 else if (ifc
->address
->prefixlen
< IPV4_MAX_PREFIXLEN
)
2431 /* calculate the appropriate broadcast address
2433 to
.sin_addr
.s_addr
= ipv4_broadcast_addr(
2434 ifc
->address
->u
.prefix4
.s_addr
,
2435 ifc
->address
->prefixlen
);
2437 /* do not know where to send the packet */
2439 to
.sin_port
= htons(RIP_PORT_DEFAULT
);
2441 if (IS_RIP_DEBUG_EVENT
)
2442 zlog_debug("%s announce to %s on %s",
2443 CONNECTED_PEER(ifc
) ? "unicast"
2445 inet_ntoa(to
.sin_addr
), ifp
->name
);
2447 rip_output_process(ifc
, &to
, route_type
, version
);
2452 /* Update send to all interface and neighbor. */
2453 static void rip_update_process(int route_type
)
2455 struct vrf
*vrf
= vrf_lookup_by_id(VRF_DEFAULT
);
2456 struct listnode
*ifnode
, *ifnnode
;
2457 struct connected
*connected
;
2458 struct interface
*ifp
;
2459 struct rip_interface
*ri
;
2460 struct route_node
*rp
;
2461 struct sockaddr_in to
;
2464 /* Send RIP update to each interface. */
2465 FOR_ALL_INTERFACES (vrf
, ifp
) {
2466 if (if_is_loopback(ifp
))
2469 if (!if_is_operative(ifp
))
2472 /* Fetch RIP interface information. */
2475 /* When passive interface is specified, suppress announce to the
2482 * If there is no version configuration in the
2484 * use rip's version setting.
2486 int vsend
= ((ri
->ri_send
== RI_RIP_UNSPEC
)
2490 if (IS_RIP_DEBUG_EVENT
)
2491 zlog_debug("SEND UPDATE to %s ifindex %d",
2492 ifp
->name
, ifp
->ifindex
);
2494 /* send update on each connected network */
2495 for (ALL_LIST_ELEMENTS(ifp
->connected
, ifnode
, ifnnode
,
2497 if (connected
->address
->family
== AF_INET
) {
2499 rip_update_interface(
2503 && if_is_multicast(ifp
))
2504 rip_update_interface(
2512 /* RIP send updates to each neighbor. */
2513 for (rp
= route_top(rip
->neighbor
); rp
; rp
= route_next(rp
))
2514 if (rp
->info
!= NULL
) {
2517 connected
= if_lookup_address(&p
->u
.prefix4
, AF_INET
,
2521 "Neighbor %s doesnt have connected interface!",
2522 inet_ntoa(p
->u
.prefix4
));
2526 /* Set destination address and port */
2527 memset(&to
, 0, sizeof(struct sockaddr_in
));
2528 to
.sin_addr
= p
->u
.prefix4
;
2529 to
.sin_port
= htons(RIP_PORT_DEFAULT
);
2531 /* RIP version is rip's configuration. */
2532 rip_output_process(connected
, &to
, route_type
,
2537 /* RIP's periodical timer. */
2538 static int rip_update(struct thread
*t
)
2540 /* Clear timer pointer. */
2541 rip
->t_update
= NULL
;
2543 if (IS_RIP_DEBUG_EVENT
)
2544 zlog_debug("update timer fire!");
2546 /* Process update output. */
2547 rip_update_process(rip_all_route
);
2549 /* Triggered updates may be suppressed if a regular update is due by
2550 the time the triggered update would be sent. */
2551 RIP_TIMER_OFF(rip
->t_triggered_interval
);
2554 /* Register myself. */
2555 rip_event(RIP_UPDATE_EVENT
, 0);
2560 /* Walk down the RIP routing table then clear changed flag. */
2561 static void rip_clear_changed_flag(void)
2563 struct route_node
*rp
;
2564 struct rip_info
*rinfo
= NULL
;
2565 struct list
*list
= NULL
;
2566 struct listnode
*listnode
= NULL
;
2568 for (rp
= route_top(rip
->table
); rp
; rp
= route_next(rp
))
2569 if ((list
= rp
->info
) != NULL
)
2570 for (ALL_LIST_ELEMENTS_RO(list
, listnode
, rinfo
)) {
2571 UNSET_FLAG(rinfo
->flags
, RIP_RTF_CHANGED
);
2572 /* This flag can be set only on the first entry.
2578 /* Triggered update interval timer. */
2579 static int rip_triggered_interval(struct thread
*t
)
2581 int rip_triggered_update(struct thread
*);
2583 rip
->t_triggered_interval
= NULL
;
2587 rip_triggered_update(t
);
2592 /* Execute triggered update. */
2593 static int rip_triggered_update(struct thread
*t
)
2597 /* Clear thred pointer. */
2598 rip
->t_triggered_update
= NULL
;
2600 /* Cancel interval timer. */
2601 RIP_TIMER_OFF(rip
->t_triggered_interval
);
2604 /* Logging triggered update. */
2605 if (IS_RIP_DEBUG_EVENT
)
2606 zlog_debug("triggered update!");
2608 /* Split Horizon processing is done when generating triggered
2609 updates as well as normal updates (see section 2.6). */
2610 rip_update_process(rip_changed_route
);
2612 /* Once all of the triggered updates have been generated, the route
2613 change flags should be cleared. */
2614 rip_clear_changed_flag();
2616 /* After a triggered update is sent, a timer should be set for a
2617 random interval between 1 and 5 seconds. If other changes that
2618 would trigger updates occur before the timer expires, a single
2619 update is triggered when the timer expires. */
2620 interval
= (random() % 5) + 1;
2622 rip
->t_triggered_interval
= NULL
;
2623 thread_add_timer(master
, rip_triggered_interval
, NULL
, interval
,
2624 &rip
->t_triggered_interval
);
2629 /* Withdraw redistributed route. */
2630 void rip_redistribute_withdraw(int type
)
2632 struct route_node
*rp
;
2633 struct rip_info
*rinfo
= NULL
;
2634 struct list
*list
= NULL
;
2639 for (rp
= route_top(rip
->table
); rp
; rp
= route_next(rp
))
2640 if ((list
= rp
->info
) != NULL
) {
2641 rinfo
= listgetdata(listhead(list
));
2642 if (rinfo
->type
== type
2643 && rinfo
->sub_type
!= RIP_ROUTE_INTERFACE
) {
2644 /* Perform poisoned reverse. */
2645 rinfo
->metric
= RIP_METRIC_INFINITY
;
2646 RIP_TIMER_ON(rinfo
->t_garbage_collect
,
2647 rip_garbage_collect
,
2649 RIP_TIMER_OFF(rinfo
->t_timeout
);
2650 rinfo
->flags
|= RIP_RTF_CHANGED
;
2652 if (IS_RIP_DEBUG_EVENT
) {
2653 struct prefix_ipv4
*p
=
2654 (struct prefix_ipv4
*)&rp
->p
;
2657 "Poisone %s/%d on the interface %s with an infinity metric [withdraw]",
2658 inet_ntoa(p
->prefix
),
2665 rip_event(RIP_TRIGGERED_UPDATE
, 0);
2670 /* Create new RIP instance and set it to global variable. */
2671 static int rip_create(void)
2673 rip
= XCALLOC(MTYPE_RIP
, sizeof(struct rip
));
2675 /* Set initial value. */
2676 rip
->version_send
= RI_RIP_VERSION_2
;
2677 rip
->version_recv
= RI_RIP_VERSION_1_AND_2
;
2678 rip
->update_time
= RIP_UPDATE_TIMER_DEFAULT
;
2679 rip
->timeout_time
= RIP_TIMEOUT_TIMER_DEFAULT
;
2680 rip
->garbage_time
= RIP_GARBAGE_TIMER_DEFAULT
;
2681 rip
->default_metric
= RIP_DEFAULT_METRIC_DEFAULT
;
2683 /* Initialize RIP routig table. */
2684 rip
->table
= route_table_init();
2685 rip
->route
= route_table_init();
2686 rip
->neighbor
= route_table_init();
2688 /* Make output stream. */
2689 rip
->obuf
= stream_new(1500);
2692 rip
->sock
= rip_create_socket();
2696 /* Create read and timer thread. */
2697 rip_event(RIP_READ
, rip
->sock
);
2698 rip_event(RIP_UPDATE_EVENT
, 1);
2705 /* Sned RIP request to the destination. */
2706 int rip_request_send(struct sockaddr_in
*to
, struct interface
*ifp
,
2707 uint8_t version
, struct connected
*connected
)
2710 struct rip_packet rip_packet
;
2711 struct listnode
*node
, *nnode
;
2713 memset(&rip_packet
, 0, sizeof(rip_packet
));
2715 rip_packet
.command
= RIP_REQUEST
;
2716 rip_packet
.version
= version
;
2717 rte
= rip_packet
.rte
;
2718 rte
->metric
= htonl(RIP_METRIC_INFINITY
);
2722 * connected is only sent for ripv1 case, or when
2723 * interface does not support multicast. Caller loops
2724 * over each connected address for this case.
2726 if (rip_send_packet((uint8_t *)&rip_packet
, sizeof(rip_packet
),
2728 != sizeof(rip_packet
))
2731 return sizeof(rip_packet
);
2734 /* send request on each connected network */
2735 for (ALL_LIST_ELEMENTS(ifp
->connected
, node
, nnode
, connected
)) {
2736 struct prefix_ipv4
*p
;
2738 p
= (struct prefix_ipv4
*)connected
->address
;
2740 if (p
->family
!= AF_INET
)
2743 if (rip_send_packet((uint8_t *)&rip_packet
, sizeof(rip_packet
),
2745 != sizeof(rip_packet
))
2748 return sizeof(rip_packet
);
2751 static int rip_update_jitter(unsigned long time
)
2753 #define JITTER_BOUND 4
2754 /* We want to get the jitter to +/- 1/JITTER_BOUND the interval.
2755 Given that, we cannot let time be less than JITTER_BOUND seconds.
2756 The RIPv2 RFC says jitter should be small compared to
2757 update_time. We consider 1/JITTER_BOUND to be small.
2760 int jitter_input
= time
;
2763 if (jitter_input
< JITTER_BOUND
)
2764 jitter_input
= JITTER_BOUND
;
2766 jitter
= (((random() % ((jitter_input
* 2) + 1)) - jitter_input
));
2768 return jitter
/ JITTER_BOUND
;
2771 void rip_event(enum rip_event event
, int sock
)
2778 thread_add_read(master
, rip_read
, NULL
, sock
, &rip
->t_read
);
2780 case RIP_UPDATE_EVENT
:
2781 RIP_TIMER_OFF(rip
->t_update
);
2782 jitter
= rip_update_jitter(rip
->update_time
);
2783 thread_add_timer(master
, rip_update
, NULL
,
2784 sock
? 2 : rip
->update_time
+ jitter
,
2787 case RIP_TRIGGERED_UPDATE
:
2788 if (rip
->t_triggered_interval
)
2791 thread_add_event(master
, rip_triggered_update
, NULL
, 0,
2792 &rip
->t_triggered_update
);
2799 DEFUN_NOSH (router_rip
,
2802 "Enable a routing process\n"
2803 "Routing Information Protocol (RIP)\n")
2807 /* If rip is not enabled before. */
2811 zlog_info("Can't create RIP");
2812 return CMD_WARNING_CONFIG_FAILED
;
2815 VTY_PUSH_CONTEXT(RIP_NODE
, rip
);
2820 DEFUN (no_router_rip
,
2824 "Enable a routing process\n"
2825 "Routing Information Protocol (RIP)\n")
2835 "Set routing protocol version\n"
2841 version
= atoi(argv
[idx_number
]->arg
);
2842 if (version
!= RIPv1
&& version
!= RIPv2
) {
2843 vty_out(vty
, "invalid rip version %d\n", version
);
2844 return CMD_WARNING_CONFIG_FAILED
;
2846 rip
->version_send
= version
;
2847 rip
->version_recv
= version
;
2852 DEFUN (no_rip_version
,
2854 "no version [(1-2)]",
2856 "Set routing protocol version\n"
2859 /* Set RIP version to the default. */
2860 rip
->version_send
= RI_RIP_VERSION_2
;
2861 rip
->version_recv
= RI_RIP_VERSION_1_AND_2
;
2870 "RIP static route configuration\n"
2871 "IP prefix <network>/<length>\n")
2873 int idx_ipv4_prefixlen
= 1;
2876 struct prefix_ipv4 p
;
2877 struct route_node
*node
;
2879 memset(&nh
, 0, sizeof(nh
));
2880 nh
.type
= NEXTHOP_TYPE_IPV4
;
2882 ret
= str2prefix_ipv4(argv
[idx_ipv4_prefixlen
]->arg
, &p
);
2884 vty_out(vty
, "Malformed address\n");
2885 return CMD_WARNING_CONFIG_FAILED
;
2887 apply_mask_ipv4(&p
);
2889 /* For router rip configuration. */
2890 node
= route_node_get(rip
->route
, (struct prefix
*)&p
);
2893 vty_out(vty
, "There is already same static route.\n");
2894 route_unlock_node(node
);
2898 node
->info
= (void *)1;
2900 rip_redistribute_add(ZEBRA_ROUTE_RIP
, RIP_ROUTE_STATIC
, &p
, &nh
, 0, 0,
2906 DEFUN (no_rip_route
,
2908 "no route A.B.C.D/M",
2910 "RIP static route configuration\n"
2911 "IP prefix <network>/<length>\n")
2913 int idx_ipv4_prefixlen
= 2;
2915 struct prefix_ipv4 p
;
2916 struct route_node
*node
;
2918 ret
= str2prefix_ipv4(argv
[idx_ipv4_prefixlen
]->arg
, &p
);
2920 vty_out(vty
, "Malformed address\n");
2921 return CMD_WARNING_CONFIG_FAILED
;
2923 apply_mask_ipv4(&p
);
2925 /* For router rip configuration. */
2926 node
= route_node_lookup(rip
->route
, (struct prefix
*)&p
);
2928 vty_out(vty
, "Can't find route %s.\n",
2929 argv
[idx_ipv4_prefixlen
]->arg
);
2930 return CMD_WARNING_CONFIG_FAILED
;
2933 rip_redistribute_delete(ZEBRA_ROUTE_RIP
, RIP_ROUTE_STATIC
, &p
, 0);
2934 route_unlock_node(node
);
2937 route_unlock_node(node
);
2944 rip_update_default_metric (void)
2946 struct route_node
*np
;
2947 struct rip_info
*rinfo
= NULL
;
2948 struct list
*list
= NULL
;
2949 struct listnode
*listnode
= NULL
;
2951 for (np
= route_top (rip
->table
); np
; np
= route_next (np
))
2952 if ((list
= np
->info
) != NULL
)
2953 for (ALL_LIST_ELEMENTS_RO (list
, listnode
, rinfo
))
2954 if (rinfo
->type
!= ZEBRA_ROUTE_RIP
&& rinfo
->type
!= ZEBRA_ROUTE_CONNECT
)
2955 rinfo
->metric
= rip
->default_metric
;
2959 DEFUN (rip_default_metric
,
2960 rip_default_metric_cmd
,
2961 "default-metric (1-16)",
2962 "Set a metric of redistribute routes\n"
2967 rip
->default_metric
= atoi(argv
[idx_number
]->arg
);
2968 /* rip_update_default_metric (); */
2973 DEFUN (no_rip_default_metric
,
2974 no_rip_default_metric_cmd
,
2975 "no default-metric [(1-16)]",
2977 "Set a metric of redistribute routes\n"
2981 rip
->default_metric
= RIP_DEFAULT_METRIC_DEFAULT
;
2982 /* rip_update_default_metric (); */
2990 "timers basic (5-2147483647) (5-2147483647) (5-2147483647)",
2991 "Adjust routing timers\n"
2992 "Basic routing protocol update timers\n"
2993 "Routing table update timer value in second. Default is 30.\n"
2994 "Routing information timeout timer. Default is 180.\n"
2995 "Garbage collection timer. Default is 120.\n")
2998 int idx_number_2
= 3;
2999 int idx_number_3
= 4;
3000 unsigned long update
;
3001 unsigned long timeout
;
3002 unsigned long garbage
;
3003 char *endptr
= NULL
;
3004 unsigned long RIP_TIMER_MAX
= 2147483647;
3005 unsigned long RIP_TIMER_MIN
= 5;
3007 update
= strtoul(argv
[idx_number
]->arg
, &endptr
, 10);
3008 if (update
> RIP_TIMER_MAX
|| update
< RIP_TIMER_MIN
3009 || *endptr
!= '\0') {
3010 vty_out(vty
, "update timer value error\n");
3011 return CMD_WARNING_CONFIG_FAILED
;
3014 timeout
= strtoul(argv
[idx_number_2
]->arg
, &endptr
, 10);
3015 if (timeout
> RIP_TIMER_MAX
|| timeout
< RIP_TIMER_MIN
3016 || *endptr
!= '\0') {
3017 vty_out(vty
, "timeout timer value error\n");
3018 return CMD_WARNING_CONFIG_FAILED
;
3021 garbage
= strtoul(argv
[idx_number_3
]->arg
, &endptr
, 10);
3022 if (garbage
> RIP_TIMER_MAX
|| garbage
< RIP_TIMER_MIN
3023 || *endptr
!= '\0') {
3024 vty_out(vty
, "garbage timer value error\n");
3025 return CMD_WARNING_CONFIG_FAILED
;
3028 /* Set each timer value. */
3029 rip
->update_time
= update
;
3030 rip
->timeout_time
= timeout
;
3031 rip
->garbage_time
= garbage
;
3033 /* Reset update timer thread. */
3034 rip_event(RIP_UPDATE_EVENT
, 0);
3039 DEFUN (no_rip_timers
,
3041 "no timers basic [(0-65535) (0-65535) (0-65535)]",
3043 "Adjust routing timers\n"
3044 "Basic routing protocol update timers\n"
3045 "Routing table update timer value in second. Default is 30.\n"
3046 "Routing information timeout timer. Default is 180.\n"
3047 "Garbage collection timer. Default is 120.\n")
3049 /* Set each timer value to the default. */
3050 rip
->update_time
= RIP_UPDATE_TIMER_DEFAULT
;
3051 rip
->timeout_time
= RIP_TIMEOUT_TIMER_DEFAULT
;
3052 rip
->garbage_time
= RIP_GARBAGE_TIMER_DEFAULT
;
3054 /* Reset update timer thread. */
3055 rip_event(RIP_UPDATE_EVENT
, 0);
3061 struct route_table
*rip_distance_table
;
3063 struct rip_distance
{
3064 /* Distance value for the IP source prefix. */
3067 /* Name of the access-list to be matched. */
3071 static struct rip_distance
*rip_distance_new(void)
3073 return XCALLOC(MTYPE_RIP_DISTANCE
, sizeof(struct rip_distance
));
3076 static void rip_distance_free(struct rip_distance
*rdistance
)
3078 XFREE(MTYPE_RIP_DISTANCE
, rdistance
);
3081 static int rip_distance_set(struct vty
*vty
, const char *distance_str
,
3082 const char *ip_str
, const char *access_list_str
)
3085 struct prefix_ipv4 p
;
3087 struct route_node
*rn
;
3088 struct rip_distance
*rdistance
;
3090 ret
= str2prefix_ipv4(ip_str
, &p
);
3092 vty_out(vty
, "Malformed prefix\n");
3093 return CMD_WARNING_CONFIG_FAILED
;
3096 distance
= atoi(distance_str
);
3098 /* Get RIP distance node. */
3099 rn
= route_node_get(rip_distance_table
, (struct prefix
*)&p
);
3101 rdistance
= rn
->info
;
3102 route_unlock_node(rn
);
3104 rdistance
= rip_distance_new();
3105 rn
->info
= rdistance
;
3108 /* Set distance value. */
3109 rdistance
->distance
= distance
;
3111 /* Reset access-list configuration. */
3112 if (rdistance
->access_list
) {
3113 free(rdistance
->access_list
);
3114 rdistance
->access_list
= NULL
;
3116 if (access_list_str
)
3117 rdistance
->access_list
= strdup(access_list_str
);
3122 static int rip_distance_unset(struct vty
*vty
, const char *distance_str
,
3123 const char *ip_str
, const char *access_list_str
)
3126 struct prefix_ipv4 p
;
3127 struct route_node
*rn
;
3128 struct rip_distance
*rdistance
;
3130 ret
= str2prefix_ipv4(ip_str
, &p
);
3132 vty_out(vty
, "Malformed prefix\n");
3133 return CMD_WARNING_CONFIG_FAILED
;
3136 rn
= route_node_lookup(rip_distance_table
, (struct prefix
*)&p
);
3138 vty_out(vty
, "Can't find specified prefix\n");
3139 return CMD_WARNING_CONFIG_FAILED
;
3142 rdistance
= rn
->info
;
3144 if (rdistance
->access_list
)
3145 free(rdistance
->access_list
);
3146 rip_distance_free(rdistance
);
3149 route_unlock_node(rn
);
3150 route_unlock_node(rn
);
3155 static void rip_distance_reset(void)
3157 struct route_node
*rn
;
3158 struct rip_distance
*rdistance
;
3160 for (rn
= route_top(rip_distance_table
); rn
; rn
= route_next(rn
))
3161 if ((rdistance
= rn
->info
) != NULL
) {
3162 if (rdistance
->access_list
)
3163 free(rdistance
->access_list
);
3164 rip_distance_free(rdistance
);
3166 route_unlock_node(rn
);
3170 /* Apply RIP information to distance method. */
3171 uint8_t rip_distance_apply(struct rip_info
*rinfo
)
3173 struct route_node
*rn
;
3174 struct prefix_ipv4 p
;
3175 struct rip_distance
*rdistance
;
3176 struct access_list
*alist
;
3181 memset(&p
, 0, sizeof(struct prefix_ipv4
));
3183 p
.prefix
= rinfo
->from
;
3184 p
.prefixlen
= IPV4_MAX_BITLEN
;
3186 /* Check source address. */
3187 rn
= route_node_match(rip_distance_table
, (struct prefix
*)&p
);
3189 rdistance
= rn
->info
;
3190 route_unlock_node(rn
);
3192 if (rdistance
->access_list
) {
3193 alist
= access_list_lookup(AFI_IP
,
3194 rdistance
->access_list
);
3197 if (access_list_apply(alist
, &rinfo
->rp
->p
)
3201 return rdistance
->distance
;
3203 return rdistance
->distance
;
3207 return rip
->distance
;
3212 static void rip_distance_show(struct vty
*vty
)
3214 struct route_node
*rn
;
3215 struct rip_distance
*rdistance
;
3219 vty_out(vty
, " Distance: (default is %d)\n",
3220 rip
->distance
? rip
->distance
: ZEBRA_RIP_DISTANCE_DEFAULT
);
3222 for (rn
= route_top(rip_distance_table
); rn
; rn
= route_next(rn
))
3223 if ((rdistance
= rn
->info
) != NULL
) {
3226 " Address Distance List\n");
3229 sprintf(buf
, "%s/%d", inet_ntoa(rn
->p
.u
.prefix4
),
3231 vty_out(vty
, " %-20s %4d %s\n", buf
,
3232 rdistance
->distance
,
3233 rdistance
->access_list
? rdistance
->access_list
3238 DEFUN (rip_distance
,
3241 "Administrative distance\n"
3245 rip
->distance
= atoi(argv
[idx_number
]->arg
);
3249 DEFUN (no_rip_distance
,
3250 no_rip_distance_cmd
,
3251 "no distance (1-255)",
3253 "Administrative distance\n"
3260 DEFUN (rip_distance_source
,
3261 rip_distance_source_cmd
,
3262 "distance (1-255) A.B.C.D/M",
3263 "Administrative distance\n"
3265 "IP source prefix\n")
3268 int idx_ipv4_prefixlen
= 2;
3269 rip_distance_set(vty
, argv
[idx_number
]->arg
,
3270 argv
[idx_ipv4_prefixlen
]->arg
, NULL
);
3274 DEFUN (no_rip_distance_source
,
3275 no_rip_distance_source_cmd
,
3276 "no distance (1-255) A.B.C.D/M",
3278 "Administrative distance\n"
3280 "IP source prefix\n")
3283 int idx_ipv4_prefixlen
= 3;
3284 rip_distance_unset(vty
, argv
[idx_number
]->arg
,
3285 argv
[idx_ipv4_prefixlen
]->arg
, NULL
);
3289 DEFUN (rip_distance_source_access_list
,
3290 rip_distance_source_access_list_cmd
,
3291 "distance (1-255) A.B.C.D/M WORD",
3292 "Administrative distance\n"
3294 "IP source prefix\n"
3295 "Access list name\n")
3298 int idx_ipv4_prefixlen
= 2;
3300 rip_distance_set(vty
, argv
[idx_number
]->arg
,
3301 argv
[idx_ipv4_prefixlen
]->arg
, argv
[idx_word
]->arg
);
3305 DEFUN (no_rip_distance_source_access_list
,
3306 no_rip_distance_source_access_list_cmd
,
3307 "no distance (1-255) A.B.C.D/M WORD",
3309 "Administrative distance\n"
3311 "IP source prefix\n"
3312 "Access list name\n")
3315 int idx_ipv4_prefixlen
= 3;
3317 rip_distance_unset(vty
, argv
[idx_number
]->arg
,
3318 argv
[idx_ipv4_prefixlen
]->arg
, argv
[idx_word
]->arg
);
3322 /* Update ECMP routes to zebra when ECMP is disabled. */
3323 static void rip_ecmp_disable(void)
3325 struct route_node
*rp
;
3326 struct rip_info
*rinfo
, *tmp_rinfo
;
3328 struct listnode
*node
, *nextnode
;
3333 for (rp
= route_top(rip
->table
); rp
; rp
= route_next(rp
))
3334 if ((list
= rp
->info
) != NULL
&& listcount(list
) > 1) {
3335 rinfo
= listgetdata(listhead(list
));
3336 if (!rip_route_rte(rinfo
))
3339 /* Drop all other entries, except the first one. */
3340 for (ALL_LIST_ELEMENTS(list
, node
, nextnode
, tmp_rinfo
))
3341 if (tmp_rinfo
!= rinfo
) {
3342 RIP_TIMER_OFF(tmp_rinfo
->t_timeout
);
3344 tmp_rinfo
->t_garbage_collect
);
3345 list_delete_node(list
, node
);
3346 rip_info_free(tmp_rinfo
);
3350 rip_zebra_ipv4_add(rp
);
3352 /* Set the route change flag. */
3353 SET_FLAG(rinfo
->flags
, RIP_RTF_CHANGED
);
3355 /* Signal the output process to trigger an update. */
3356 rip_event(RIP_TRIGGERED_UPDATE
, 0);
3360 DEFUN (rip_allow_ecmp
,
3363 "Allow Equal Cost MultiPath\n")
3366 vty_out(vty
, "ECMP is already enabled.\n");
3371 zlog_info("ECMP is enabled.");
3375 DEFUN (no_rip_allow_ecmp
,
3376 no_rip_allow_ecmp_cmd
,
3379 "Allow Equal Cost MultiPath\n")
3382 vty_out(vty
, "ECMP is already disabled.\n");
3387 zlog_info("ECMP is disabled.");
3392 /* Print out routes update time. */
3393 static void rip_vty_out_uptime(struct vty
*vty
, struct rip_info
*rinfo
)
3398 char timebuf
[TIME_BUF
];
3399 struct thread
*thread
;
3401 if ((thread
= rinfo
->t_timeout
) != NULL
) {
3402 clock
= thread_timer_remain_second(thread
);
3403 tm
= gmtime(&clock
);
3404 strftime(timebuf
, TIME_BUF
, "%M:%S", tm
);
3405 vty_out(vty
, "%5s", timebuf
);
3406 } else if ((thread
= rinfo
->t_garbage_collect
) != NULL
) {
3407 clock
= thread_timer_remain_second(thread
);
3408 tm
= gmtime(&clock
);
3409 strftime(timebuf
, TIME_BUF
, "%M:%S", tm
);
3410 vty_out(vty
, "%5s", timebuf
);
3414 static const char *rip_route_type_print(int sub_type
)
3419 case RIP_ROUTE_STATIC
:
3421 case RIP_ROUTE_DEFAULT
:
3423 case RIP_ROUTE_REDISTRIBUTE
:
3425 case RIP_ROUTE_INTERFACE
:
3437 "Show RIP routes\n")
3439 struct route_node
*np
;
3440 struct rip_info
*rinfo
= NULL
;
3441 struct list
*list
= NULL
;
3442 struct listnode
*listnode
= NULL
;
3448 "Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP\n"
3450 " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n"
3451 " (i) - interface\n\n"
3452 " Network Next Hop Metric From Tag Time\n");
3454 for (np
= route_top(rip
->table
); np
; np
= route_next(np
))
3455 if ((list
= np
->info
) != NULL
)
3456 for (ALL_LIST_ELEMENTS_RO(list
, listnode
, rinfo
)) {
3460 vty
, "%c(%s) %s/%d",
3461 /* np->lock, For debugging. */
3462 zebra_route_char(rinfo
->type
),
3463 rip_route_type_print(rinfo
->sub_type
),
3464 inet_ntoa(np
->p
.u
.prefix4
),
3470 vty_out(vty
, "%*s", len
, " ");
3472 switch (rinfo
->nh
.type
) {
3473 case NEXTHOP_TYPE_IPV4
:
3474 case NEXTHOP_TYPE_IPV4_IFINDEX
:
3475 vty_out(vty
, "%-20s %2d ",
3476 inet_ntoa(rinfo
->nh
.gate
.ipv4
),
3479 case NEXTHOP_TYPE_IFINDEX
:
3484 case NEXTHOP_TYPE_BLACKHOLE
:
3489 case NEXTHOP_TYPE_IPV6
:
3490 case NEXTHOP_TYPE_IPV6_IFINDEX
:
3492 "V6 Address Hidden %2d ",
3497 /* Route which exist in kernel routing table. */
3498 if ((rinfo
->type
== ZEBRA_ROUTE_RIP
)
3499 && (rinfo
->sub_type
== RIP_ROUTE_RTE
)) {
3500 vty_out(vty
, "%-15s ",
3501 inet_ntoa(rinfo
->from
));
3502 vty_out(vty
, "%3" ROUTE_TAG_PRI
" ",
3503 (route_tag_t
)rinfo
->tag
);
3504 rip_vty_out_uptime(vty
, rinfo
);
3505 } else if (rinfo
->metric
3506 == RIP_METRIC_INFINITY
) {
3507 vty_out(vty
, "self ");
3508 vty_out(vty
, "%3" ROUTE_TAG_PRI
" ",
3509 (route_tag_t
)rinfo
->tag
);
3510 rip_vty_out_uptime(vty
, rinfo
);
3512 if (rinfo
->external_metric
) {
3514 vty
, "self (%s:%d)",
3517 rinfo
->external_metric
);
3520 vty_out(vty
, "%*s", len
,
3525 vty_out(vty
, "%3" ROUTE_TAG_PRI
,
3526 (route_tag_t
)rinfo
->tag
);
3534 /* Vincent: formerly, it was show_ip_protocols_rip: "show ip protocols" */
3535 DEFUN (show_ip_rip_status
,
3536 show_ip_rip_status_cmd
,
3537 "show ip rip status",
3541 "IP routing protocol process parameters and statistics\n")
3543 struct vrf
*vrf
= vrf_lookup_by_id(VRF_DEFAULT
);
3544 struct interface
*ifp
;
3545 struct rip_interface
*ri
;
3546 extern const struct message ri_version_msg
[];
3547 const char *send_version
;
3548 const char *receive_version
;
3553 vty_out(vty
, "Routing Protocol is \"rip\"\n");
3554 vty_out(vty
, " Sending updates every %ld seconds with +/-50%%,",
3556 vty_out(vty
, " next due in %lu seconds\n",
3557 thread_timer_remain_second(rip
->t_update
));
3558 vty_out(vty
, " Timeout after %ld seconds,", rip
->timeout_time
);
3559 vty_out(vty
, " garbage collect after %ld seconds\n", rip
->garbage_time
);
3561 /* Filtering status show. */
3562 config_show_distribute(vty
);
3564 /* Default metric information. */
3565 vty_out(vty
, " Default redistribution metric is %d\n",
3566 rip
->default_metric
);
3568 /* Redistribute information. */
3569 vty_out(vty
, " Redistributing:");
3570 config_write_rip_redistribute(vty
, 0);
3573 vty_out(vty
, " Default version control: send version %s,",
3574 lookup_msg(ri_version_msg
, rip
->version_send
, NULL
));
3575 if (rip
->version_recv
== RI_RIP_VERSION_1_AND_2
)
3576 vty_out(vty
, " receive any version \n");
3578 vty_out(vty
, " receive version %s \n",
3579 lookup_msg(ri_version_msg
, rip
->version_recv
, NULL
));
3581 vty_out(vty
, " Interface Send Recv Key-chain\n");
3583 FOR_ALL_INTERFACES (vrf
, ifp
) {
3589 if (ri
->enable_network
|| ri
->enable_interface
) {
3590 if (ri
->ri_send
== RI_RIP_UNSPEC
)
3592 lookup_msg(ri_version_msg
,
3593 rip
->version_send
, NULL
);
3595 send_version
= lookup_msg(ri_version_msg
,
3598 if (ri
->ri_receive
== RI_RIP_UNSPEC
)
3600 lookup_msg(ri_version_msg
,
3601 rip
->version_recv
, NULL
);
3603 receive_version
= lookup_msg(
3604 ri_version_msg
, ri
->ri_receive
, NULL
);
3606 vty_out(vty
, " %-17s%-3s %-3s %s\n", ifp
->name
,
3607 send_version
, receive_version
,
3608 ri
->key_chain
? ri
->key_chain
: "");
3612 vty_out(vty
, " Routing for Networks:\n");
3613 config_write_rip_network(vty
, 0);
3616 int found_passive
= 0;
3617 FOR_ALL_INTERFACES (vrf
, ifp
) {
3620 if ((ri
->enable_network
|| ri
->enable_interface
)
3622 if (!found_passive
) {
3624 " Passive Interface(s):\n");
3627 vty_out(vty
, " %s\n", ifp
->name
);
3632 vty_out(vty
, " Routing Information Sources:\n");
3634 " Gateway BadPackets BadRoutes Distance Last Update\n");
3635 rip_peer_display(vty
);
3637 rip_distance_show(vty
);
3642 /* RIP configuration write function. */
3643 static int config_write_rip(struct vty
*vty
)
3646 struct route_node
*rn
;
3647 struct rip_distance
*rdistance
;
3650 /* Router RIP statement. */
3651 vty_out(vty
, "router rip\n");
3654 /* RIP version statement. Default is RIP version 2. */
3655 if (rip
->version_send
!= RI_RIP_VERSION_2
3656 || rip
->version_recv
!= RI_RIP_VERSION_1_AND_2
)
3657 vty_out(vty
, " version %d\n", rip
->version_send
);
3659 /* RIP timer configuration. */
3660 if (rip
->update_time
!= RIP_UPDATE_TIMER_DEFAULT
3661 || rip
->timeout_time
!= RIP_TIMEOUT_TIMER_DEFAULT
3662 || rip
->garbage_time
!= RIP_GARBAGE_TIMER_DEFAULT
)
3663 vty_out(vty
, " timers basic %lu %lu %lu\n",
3664 rip
->update_time
, rip
->timeout_time
,
3667 /* Default information configuration. */
3668 if (rip
->default_information
) {
3669 if (rip
->default_information_route_map
)
3671 " default-information originate route-map %s\n",
3672 rip
->default_information_route_map
);
3675 " default-information originate\n");
3678 /* Redistribute configuration. */
3679 config_write_rip_redistribute(vty
, 1);
3681 /* RIP offset-list configuration. */
3682 config_write_rip_offset_list(vty
);
3684 /* RIP enabled network and interface configuration. */
3685 config_write_rip_network(vty
, 1);
3687 /* RIP default metric configuration */
3688 if (rip
->default_metric
!= RIP_DEFAULT_METRIC_DEFAULT
)
3689 vty_out(vty
, " default-metric %d\n",
3690 rip
->default_metric
);
3692 /* Distribute configuration. */
3693 write
+= config_write_distribute(vty
);
3695 /* Interface routemap configuration */
3696 write
+= config_write_if_rmap(vty
);
3698 /* Distance configuration. */
3700 vty_out(vty
, " distance %d\n", rip
->distance
);
3702 /* RIP source IP prefix distance configuration. */
3703 for (rn
= route_top(rip_distance_table
); rn
;
3704 rn
= route_next(rn
))
3705 if ((rdistance
= rn
->info
) != NULL
)
3706 vty_out(vty
, " distance %d %s/%d %s\n",
3707 rdistance
->distance
,
3708 inet_ntoa(rn
->p
.u
.prefix4
),
3710 rdistance
->access_list
3711 ? rdistance
->access_list
3714 /* ECMP configuration. */
3716 vty_out(vty
, " allow-ecmp\n");
3718 /* RIP static route configuration. */
3719 for (rn
= route_top(rip
->route
); rn
; rn
= route_next(rn
))
3721 vty_out(vty
, " route %s/%d\n",
3722 inet_ntoa(rn
->p
.u
.prefix4
),
3728 /* RIP node structure. */
3729 static struct cmd_node rip_node
= {RIP_NODE
, "%s(config-router)# ", 1};
3731 /* Distribute-list update functions. */
3732 static void rip_distribute_update(struct distribute
*dist
)
3734 struct interface
*ifp
;
3735 struct rip_interface
*ri
;
3736 struct access_list
*alist
;
3737 struct prefix_list
*plist
;
3742 ifp
= if_lookup_by_name(dist
->ifname
, VRF_DEFAULT
);
3748 if (dist
->list
[DISTRIBUTE_V4_IN
]) {
3749 alist
= access_list_lookup(AFI_IP
,
3750 dist
->list
[DISTRIBUTE_V4_IN
]);
3752 ri
->list
[RIP_FILTER_IN
] = alist
;
3754 ri
->list
[RIP_FILTER_IN
] = NULL
;
3756 ri
->list
[RIP_FILTER_IN
] = NULL
;
3758 if (dist
->list
[DISTRIBUTE_V4_OUT
]) {
3759 alist
= access_list_lookup(AFI_IP
,
3760 dist
->list
[DISTRIBUTE_V4_OUT
]);
3762 ri
->list
[RIP_FILTER_OUT
] = alist
;
3764 ri
->list
[RIP_FILTER_OUT
] = NULL
;
3766 ri
->list
[RIP_FILTER_OUT
] = NULL
;
3768 if (dist
->prefix
[DISTRIBUTE_V4_IN
]) {
3769 plist
= prefix_list_lookup(AFI_IP
,
3770 dist
->prefix
[DISTRIBUTE_V4_IN
]);
3772 ri
->prefix
[RIP_FILTER_IN
] = plist
;
3774 ri
->prefix
[RIP_FILTER_IN
] = NULL
;
3776 ri
->prefix
[RIP_FILTER_IN
] = NULL
;
3778 if (dist
->prefix
[DISTRIBUTE_V4_OUT
]) {
3779 plist
= prefix_list_lookup(AFI_IP
,
3780 dist
->prefix
[DISTRIBUTE_V4_OUT
]);
3782 ri
->prefix
[RIP_FILTER_OUT
] = plist
;
3784 ri
->prefix
[RIP_FILTER_OUT
] = NULL
;
3786 ri
->prefix
[RIP_FILTER_OUT
] = NULL
;
3789 void rip_distribute_update_interface(struct interface
*ifp
)
3791 struct distribute
*dist
;
3793 dist
= distribute_lookup(ifp
->name
);
3795 rip_distribute_update(dist
);
3798 /* Update all interface's distribute list. */
3800 static void rip_distribute_update_all(struct prefix_list
*notused
)
3802 struct vrf
*vrf
= vrf_lookup_by_id(VRF_DEFAULT
);
3803 struct interface
*ifp
;
3805 FOR_ALL_INTERFACES (vrf
, ifp
)
3806 rip_distribute_update_interface(ifp
);
3809 static void rip_distribute_update_all_wrapper(struct access_list
*notused
)
3811 rip_distribute_update_all(NULL
);
3814 /* Delete all added rip route. */
3815 void rip_clean(void)
3818 struct route_node
*rp
;
3819 struct rip_info
*rinfo
= NULL
;
3820 struct list
*list
= NULL
;
3821 struct listnode
*listnode
= NULL
;
3826 /* Clear RIP routes */
3827 for (rp
= route_top(rip
->table
); rp
; rp
= route_next(rp
))
3828 if ((list
= rp
->info
) != NULL
) {
3829 rinfo
= listgetdata(listhead(list
));
3830 if (rip_route_rte(rinfo
))
3831 rip_zebra_ipv4_delete(rp
);
3833 for (ALL_LIST_ELEMENTS_RO(list
, listnode
,
3835 RIP_TIMER_OFF(rinfo
->t_timeout
);
3836 RIP_TIMER_OFF(rinfo
->t_garbage_collect
);
3837 rip_info_free(rinfo
);
3839 list_delete_and_null(&list
);
3841 route_unlock_node(rp
);
3844 /* Cancel RIP related timers. */
3845 RIP_TIMER_OFF(rip
->t_update
);
3846 RIP_TIMER_OFF(rip
->t_triggered_update
);
3847 RIP_TIMER_OFF(rip
->t_triggered_interval
);
3849 /* Cancel read thread. */
3850 THREAD_READ_OFF(rip
->t_read
);
3852 /* Close RIP socket. */
3853 if (rip
->sock
>= 0) {
3858 stream_free(rip
->obuf
);
3859 /* Static RIP route configuration. */
3860 for (rp
= route_top(rip
->route
); rp
; rp
= route_next(rp
))
3863 route_unlock_node(rp
);
3866 /* RIP neighbor configuration. */
3867 for (rp
= route_top(rip
->neighbor
); rp
; rp
= route_next(rp
))
3870 route_unlock_node(rp
);
3873 /* Redistribute related clear. */
3874 if (rip
->default_information_route_map
)
3875 free(rip
->default_information_route_map
);
3877 for (i
= 0; i
< ZEBRA_ROUTE_MAX
; i
++)
3878 if (rip
->route_map
[i
].name
)
3879 free(rip
->route_map
[i
].name
);
3881 XFREE(MTYPE_ROUTE_TABLE
, rip
->table
);
3882 XFREE(MTYPE_ROUTE_TABLE
, rip
->route
);
3883 XFREE(MTYPE_ROUTE_TABLE
, rip
->neighbor
);
3885 XFREE(MTYPE_RIP
, rip
);
3889 rip_clean_network();
3890 rip_passive_nondefault_clean();
3892 rip_interfaces_clean();
3893 rip_distance_reset();
3894 rip_redistribute_clean();
3897 /* Reset all values to the default settings. */
3898 void rip_reset(void)
3900 /* Reset global counters. */
3901 rip_global_route_changes
= 0;
3902 rip_global_queries
= 0;
3904 /* Call ripd related reset functions. */
3906 rip_route_map_reset();
3908 /* Call library reset functions. */
3910 access_list_reset();
3911 prefix_list_reset();
3913 distribute_list_reset();
3915 rip_interfaces_reset();
3916 rip_distance_reset();
3918 rip_zclient_reset();
3921 static void rip_if_rmap_update(struct if_rmap
*if_rmap
)
3923 struct interface
*ifp
;
3924 struct rip_interface
*ri
;
3925 struct route_map
*rmap
;
3927 ifp
= if_lookup_by_name(if_rmap
->ifname
, VRF_DEFAULT
);
3933 if (if_rmap
->routemap
[IF_RMAP_IN
]) {
3934 rmap
= route_map_lookup_by_name(if_rmap
->routemap
[IF_RMAP_IN
]);
3936 ri
->routemap
[IF_RMAP_IN
] = rmap
;
3938 ri
->routemap
[IF_RMAP_IN
] = NULL
;
3940 ri
->routemap
[RIP_FILTER_IN
] = NULL
;
3942 if (if_rmap
->routemap
[IF_RMAP_OUT
]) {
3943 rmap
= route_map_lookup_by_name(if_rmap
->routemap
[IF_RMAP_OUT
]);
3945 ri
->routemap
[IF_RMAP_OUT
] = rmap
;
3947 ri
->routemap
[IF_RMAP_OUT
] = NULL
;
3949 ri
->routemap
[RIP_FILTER_OUT
] = NULL
;
3952 void rip_if_rmap_update_interface(struct interface
*ifp
)
3954 struct if_rmap
*if_rmap
;
3956 if_rmap
= if_rmap_lookup(ifp
->name
);
3958 rip_if_rmap_update(if_rmap
);
3961 static void rip_routemap_update_redistribute(void)
3966 for (i
= 0; i
< ZEBRA_ROUTE_MAX
; i
++) {
3967 if (rip
->route_map
[i
].name
)
3968 rip
->route_map
[i
].map
=
3969 route_map_lookup_by_name(
3970 rip
->route_map
[i
].name
);
3976 static void rip_routemap_update(const char *notused
)
3978 struct vrf
*vrf
= vrf_lookup_by_id(VRF_DEFAULT
);
3979 struct interface
*ifp
;
3981 FOR_ALL_INTERFACES (vrf
, ifp
)
3982 rip_if_rmap_update_interface(ifp
);
3984 rip_routemap_update_redistribute();
3987 /* Allocate new rip structure and set default value. */
3990 /* Install top nodes. */
3991 install_node(&rip_node
, config_write_rip
);
3993 /* Install rip commands. */
3994 install_element(VIEW_NODE
, &show_ip_rip_cmd
);
3995 install_element(VIEW_NODE
, &show_ip_rip_status_cmd
);
3996 install_element(CONFIG_NODE
, &router_rip_cmd
);
3997 install_element(CONFIG_NODE
, &no_router_rip_cmd
);
3999 install_default(RIP_NODE
);
4000 install_element(RIP_NODE
, &rip_version_cmd
);
4001 install_element(RIP_NODE
, &no_rip_version_cmd
);
4002 install_element(RIP_NODE
, &rip_default_metric_cmd
);
4003 install_element(RIP_NODE
, &no_rip_default_metric_cmd
);
4004 install_element(RIP_NODE
, &rip_timers_cmd
);
4005 install_element(RIP_NODE
, &no_rip_timers_cmd
);
4006 install_element(RIP_NODE
, &rip_route_cmd
);
4007 install_element(RIP_NODE
, &no_rip_route_cmd
);
4008 install_element(RIP_NODE
, &rip_distance_cmd
);
4009 install_element(RIP_NODE
, &no_rip_distance_cmd
);
4010 install_element(RIP_NODE
, &rip_distance_source_cmd
);
4011 install_element(RIP_NODE
, &no_rip_distance_source_cmd
);
4012 install_element(RIP_NODE
, &rip_distance_source_access_list_cmd
);
4013 install_element(RIP_NODE
, &no_rip_distance_source_access_list_cmd
);
4014 install_element(RIP_NODE
, &rip_allow_ecmp_cmd
);
4015 install_element(RIP_NODE
, &no_rip_allow_ecmp_cmd
);
4017 /* Debug related init. */
4020 /* Access list install. */
4022 access_list_add_hook(rip_distribute_update_all_wrapper
);
4023 access_list_delete_hook(rip_distribute_update_all_wrapper
);
4025 /* Prefix list initialize.*/
4027 prefix_list_add_hook(rip_distribute_update_all
);
4028 prefix_list_delete_hook(rip_distribute_update_all
);
4030 /* Distribute list install. */
4031 distribute_list_init(RIP_NODE
);
4032 distribute_list_add_hook(rip_distribute_update
);
4033 distribute_list_delete_hook(rip_distribute_update
);
4036 rip_route_map_init();
4039 route_map_add_hook(rip_routemap_update
);
4040 route_map_delete_hook(rip_routemap_update
);
4042 if_rmap_init(RIP_NODE
);
4043 if_rmap_hook_add(rip_if_rmap_update
);
4044 if_rmap_hook_delete(rip_if_rmap_update
);
4046 /* Distance control. */
4047 rip_distance_table
= route_table_init();