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718e3744 | 1 | /* RIPng daemon |
2 | * Copyright (C) 1998, 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
718e3744 | 23 | #include "prefix.h" |
24 | #include "filter.h" | |
25 | #include "log.h" | |
26 | #include "thread.h" | |
27 | #include "memory.h" | |
28 | #include "if.h" | |
29 | #include "stream.h" | |
fe08ba7e | 30 | #include "agg_table.h" |
718e3744 | 31 | #include "command.h" |
32 | #include "sockopt.h" | |
33 | #include "distribute.h" | |
34 | #include "plist.h" | |
35 | #include "routemap.h" | |
0750d21f | 36 | #include "if_rmap.h" |
27d47aa7 | 37 | #include "privs.h" |
7f9a4fd7 | 38 | #include "lib_errors.h" |
9a12e9e5 | 39 | #include "northbound_cli.h" |
5920b3eb | 40 | #include "network.h" |
718e3744 | 41 | |
42 | #include "ripngd/ripngd.h" | |
43 | #include "ripngd/ripng_route.h" | |
44 | #include "ripngd/ripng_debug.h" | |
a94434b6 | 45 | #include "ripngd/ripng_nexthop.h" |
718e3744 | 46 | |
bf8d3d6a DL |
47 | DEFINE_MGROUP(RIPNGD, "ripngd"); |
48 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG, "RIPng structure"); | |
49 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_VRF_NAME, "RIPng VRF name"); | |
50 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_ROUTE, "RIPng route info"); | |
b3a7e30d | 51 | |
d62a17ae | 52 | enum { ripng_all_route, |
53 | ripng_changed_route, | |
718e3744 | 54 | }; |
55 | ||
03a38493 PG |
56 | static void ripng_distribute_update(struct distribute_ctx *ctx, |
57 | struct distribute *dist); | |
58 | ||
718e3744 | 59 | /* Prototypes. */ |
d62a17ae | 60 | void ripng_output_process(struct interface *, struct sockaddr_in6 *, int); |
dde7b15b RW |
61 | static void ripng_instance_enable(struct ripng *ripng, struct vrf *vrf, |
62 | int sock); | |
63 | static void ripng_instance_disable(struct ripng *ripng); | |
cc9f21da | 64 | static void ripng_triggered_update(struct thread *); |
4b23867c PG |
65 | static void ripng_if_rmap_update(struct if_rmap_ctx *ctx, |
66 | struct if_rmap *if_rmap); | |
718e3744 | 67 | |
dde7b15b RW |
68 | /* Generate rb-tree of RIPng instances. */ |
69 | static inline int ripng_instance_compare(const struct ripng *a, | |
70 | const struct ripng *b) | |
71 | { | |
72 | return strcmp(a->vrf_name, b->vrf_name); | |
73 | } | |
74 | RB_GENERATE(ripng_instance_head, ripng, entry, ripng_instance_compare) | |
75 | ||
76 | struct ripng_instance_head ripng_instances = RB_INITIALIZER(&ripng_instances); | |
77 | ||
718e3744 | 78 | /* RIPng next hop specification. */ |
d62a17ae | 79 | struct ripng_nexthop { |
80 | enum ripng_nexthop_type { | |
81 | RIPNG_NEXTHOP_UNSPEC, | |
82 | RIPNG_NEXTHOP_ADDRESS | |
83 | } flag; | |
84 | struct in6_addr address; | |
718e3744 | 85 | }; |
718e3744 | 86 | |
49e06d25 | 87 | int ripng_route_rte(struct ripng_info *rinfo) |
a94434b6 | 88 | { |
d62a17ae | 89 | return (rinfo->type == ZEBRA_ROUTE_RIPNG |
90 | && rinfo->sub_type == RIPNG_ROUTE_RTE); | |
a94434b6 | 91 | } |
92 | ||
718e3744 | 93 | /* Allocate new ripng information. */ |
4d762f26 | 94 | struct ripng_info *ripng_info_new(void) |
718e3744 | 95 | { |
d62a17ae | 96 | struct ripng_info *new; |
718e3744 | 97 | |
d62a17ae | 98 | new = XCALLOC(MTYPE_RIPNG_ROUTE, sizeof(struct ripng_info)); |
99 | return new; | |
718e3744 | 100 | } |
101 | ||
102 | /* Free ripng information. */ | |
d62a17ae | 103 | void ripng_info_free(struct ripng_info *rinfo) |
718e3744 | 104 | { |
d62a17ae | 105 | XFREE(MTYPE_RIPNG_ROUTE, rinfo); |
718e3744 | 106 | } |
6b0655a2 | 107 | |
5c84b9a5 RW |
108 | struct ripng *ripng_info_get_instance(const struct ripng_info *rinfo) |
109 | { | |
110 | return agg_get_table_info(agg_get_table(rinfo->rp)); | |
111 | } | |
112 | ||
718e3744 | 113 | /* Create ripng socket. */ |
dde7b15b | 114 | int ripng_make_socket(struct vrf *vrf) |
718e3744 | 115 | { |
d62a17ae | 116 | int ret; |
117 | int sock; | |
118 | struct sockaddr_in6 ripaddr; | |
dde7b15b RW |
119 | const char *vrf_dev = NULL; |
120 | ||
121 | /* Make datagram socket. */ | |
122 | if (vrf->vrf_id != VRF_DEFAULT) | |
123 | vrf_dev = vrf->name; | |
0cf6db21 | 124 | frr_with_privs(&ripngd_privs) { |
dde7b15b RW |
125 | sock = vrf_socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, |
126 | vrf->vrf_id, vrf_dev); | |
127 | if (sock < 0) { | |
128 | flog_err_sys(EC_LIB_SOCKET, | |
129 | "Cannot create UDP socket: %s", | |
130 | safe_strerror(errno)); | |
131 | return -1; | |
132 | } | |
d62a17ae | 133 | } |
718e3744 | 134 | |
dde7b15b RW |
135 | sockopt_reuseaddr(sock); |
136 | sockopt_reuseport(sock); | |
d62a17ae | 137 | setsockopt_so_recvbuf(sock, 8096); |
138 | ret = setsockopt_ipv6_pktinfo(sock, 1); | |
139 | if (ret < 0) | |
44f12f20 | 140 | goto error; |
6d0732c8 | 141 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 142 | ret = setsockopt_ipv6_tclass(sock, IPTOS_PREC_INTERNETCONTROL); |
143 | if (ret < 0) | |
44f12f20 | 144 | goto error; |
6d0732c8 | 145 | #endif |
d62a17ae | 146 | ret = setsockopt_ipv6_multicast_hops(sock, 255); |
147 | if (ret < 0) | |
44f12f20 | 148 | goto error; |
d62a17ae | 149 | ret = setsockopt_ipv6_multicast_loop(sock, 0); |
150 | if (ret < 0) | |
44f12f20 | 151 | goto error; |
d62a17ae | 152 | ret = setsockopt_ipv6_hoplimit(sock, 1); |
153 | if (ret < 0) | |
44f12f20 | 154 | goto error; |
d62a17ae | 155 | |
156 | memset(&ripaddr, 0, sizeof(ripaddr)); | |
157 | ripaddr.sin6_family = AF_INET6; | |
718e3744 | 158 | #ifdef SIN6_LEN |
d62a17ae | 159 | ripaddr.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 160 | #endif /* SIN6_LEN */ |
d62a17ae | 161 | ripaddr.sin6_port = htons(RIPNG_PORT_DEFAULT); |
718e3744 | 162 | |
0cf6db21 | 163 | frr_with_privs(&ripngd_privs) { |
01b9e3fd DL |
164 | ret = bind(sock, (struct sockaddr *)&ripaddr, sizeof(ripaddr)); |
165 | if (ret < 0) { | |
633fc9b1 DL |
166 | zlog_err("Can't bind ripng socket: %s.", |
167 | safe_strerror(errno)); | |
01b9e3fd DL |
168 | goto error; |
169 | } | |
d62a17ae | 170 | } |
d62a17ae | 171 | return sock; |
44f12f20 RW |
172 | |
173 | error: | |
174 | close(sock); | |
175 | return ret; | |
718e3744 | 176 | } |
177 | ||
178 | /* Send RIPng packet. */ | |
d62a17ae | 179 | int ripng_send_packet(caddr_t buf, int bufsize, struct sockaddr_in6 *to, |
180 | struct interface *ifp) | |
181 | { | |
5c84b9a5 RW |
182 | struct ripng_interface *ri = ifp->info; |
183 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 184 | int ret; |
185 | struct msghdr msg; | |
186 | struct iovec iov; | |
187 | struct cmsghdr *cmsgptr; | |
2ae9e38f | 188 | char adata[256] = {}; |
d62a17ae | 189 | struct in6_pktinfo *pkt; |
190 | struct sockaddr_in6 addr; | |
191 | ||
192 | if (IS_RIPNG_DEBUG_SEND) { | |
193 | if (to) | |
2e5b3f37 | 194 | zlog_debug("send to %pI6", &to->sin6_addr); |
d62a17ae | 195 | zlog_debug(" send interface %s", ifp->name); |
196 | zlog_debug(" send packet size %d", bufsize); | |
197 | } | |
198 | ||
199 | memset(&addr, 0, sizeof(struct sockaddr_in6)); | |
200 | addr.sin6_family = AF_INET6; | |
718e3744 | 201 | #ifdef SIN6_LEN |
d62a17ae | 202 | addr.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 203 | #endif /* SIN6_LEN */ |
d62a17ae | 204 | addr.sin6_flowinfo = htonl(RIPNG_PRIORITY_DEFAULT); |
205 | ||
206 | /* When destination is specified. */ | |
207 | if (to != NULL) { | |
208 | addr.sin6_addr = to->sin6_addr; | |
209 | addr.sin6_port = to->sin6_port; | |
210 | } else { | |
211 | inet_pton(AF_INET6, RIPNG_GROUP, &addr.sin6_addr); | |
212 | addr.sin6_port = htons(RIPNG_PORT_DEFAULT); | |
213 | } | |
718e3744 | 214 | |
0af35d90 | 215 | memset(&msg, 0, sizeof(msg)); |
d62a17ae | 216 | msg.msg_name = (void *)&addr; |
217 | msg.msg_namelen = sizeof(struct sockaddr_in6); | |
218 | msg.msg_iov = &iov; | |
219 | msg.msg_iovlen = 1; | |
220 | msg.msg_control = (void *)adata; | |
221 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); | |
222 | ||
223 | iov.iov_base = buf; | |
224 | iov.iov_len = bufsize; | |
225 | ||
226 | cmsgptr = (struct cmsghdr *)adata; | |
227 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); | |
228 | cmsgptr->cmsg_level = IPPROTO_IPV6; | |
229 | cmsgptr->cmsg_type = IPV6_PKTINFO; | |
230 | ||
231 | pkt = (struct in6_pktinfo *)CMSG_DATA(cmsgptr); | |
232 | memset(&pkt->ipi6_addr, 0, sizeof(struct in6_addr)); | |
233 | pkt->ipi6_ifindex = ifp->ifindex; | |
234 | ||
235 | ret = sendmsg(ripng->sock, &msg, 0); | |
236 | ||
237 | if (ret < 0) { | |
238 | if (to) | |
450971aa | 239 | flog_err_sys(EC_LIB_SOCKET, |
2e5b3f37 MS |
240 | "RIPng send fail on %s to %pI6: %s", |
241 | ifp->name, &to->sin6_addr, | |
09c866e3 | 242 | safe_strerror(errno)); |
d62a17ae | 243 | else |
1c50c1c0 QY |
244 | flog_err_sys(EC_LIB_SOCKET, "RIPng send fail on %s: %s", |
245 | ifp->name, safe_strerror(errno)); | |
d62a17ae | 246 | } |
718e3744 | 247 | |
d62a17ae | 248 | return ret; |
718e3744 | 249 | } |
250 | ||
251 | /* Receive UDP RIPng packet from socket. */ | |
d7c0a89a | 252 | static int ripng_recv_packet(int sock, uint8_t *buf, int bufsize, |
d62a17ae | 253 | struct sockaddr_in6 *from, ifindex_t *ifindex, |
254 | int *hoplimit) | |
255 | { | |
256 | int ret; | |
257 | struct msghdr msg; | |
258 | struct iovec iov; | |
259 | struct cmsghdr *cmsgptr; | |
260 | struct in6_addr dst = {.s6_addr = {0}}; | |
261 | ||
262 | memset(&dst, 0, sizeof(struct in6_addr)); | |
263 | ||
264 | /* Ancillary data. This store cmsghdr and in6_pktinfo. But at this | |
265 | point I can't determine size of cmsghdr */ | |
266 | char adata[1024]; | |
267 | ||
268 | /* Fill in message and iovec. */ | |
0af35d90 | 269 | memset(&msg, 0, sizeof(msg)); |
d62a17ae | 270 | msg.msg_name = (void *)from; |
271 | msg.msg_namelen = sizeof(struct sockaddr_in6); | |
272 | msg.msg_iov = &iov; | |
273 | msg.msg_iovlen = 1; | |
274 | msg.msg_control = (void *)adata; | |
0d6f7fd6 | 275 | msg.msg_controllen = sizeof(adata); |
d62a17ae | 276 | iov.iov_base = buf; |
277 | iov.iov_len = bufsize; | |
278 | ||
279 | /* If recvmsg fail return minus value. */ | |
280 | ret = recvmsg(sock, &msg, 0); | |
281 | if (ret < 0) | |
282 | return ret; | |
283 | ||
adf0e7c6 | 284 | for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL; |
d62a17ae | 285 | cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) { |
286 | /* I want interface index which this packet comes from. */ | |
287 | if (cmsgptr->cmsg_level == IPPROTO_IPV6 | |
288 | && cmsgptr->cmsg_type == IPV6_PKTINFO) { | |
289 | struct in6_pktinfo *ptr; | |
290 | ||
291 | ptr = (struct in6_pktinfo *)CMSG_DATA(cmsgptr); | |
292 | *ifindex = ptr->ipi6_ifindex; | |
293 | dst = ptr->ipi6_addr; | |
294 | ||
295 | if (*ifindex == 0) | |
296 | zlog_warn( | |
297 | "Interface index returned by IPV6_PKTINFO is zero"); | |
298 | } | |
299 | ||
300 | /* Incoming packet's multicast hop limit. */ | |
301 | if (cmsgptr->cmsg_level == IPPROTO_IPV6 | |
302 | && cmsgptr->cmsg_type == IPV6_HOPLIMIT) { | |
303 | int *phoplimit = (int *)CMSG_DATA(cmsgptr); | |
304 | *hoplimit = *phoplimit; | |
305 | } | |
5eb9d11b | 306 | } |
718e3744 | 307 | |
d62a17ae | 308 | /* Hoplimit check shold be done when destination address is |
309 | multicast address. */ | |
310 | if (!IN6_IS_ADDR_MULTICAST(&dst)) | |
311 | *hoplimit = -1; | |
718e3744 | 312 | |
d62a17ae | 313 | return ret; |
718e3744 | 314 | } |
315 | ||
316 | /* Dump rip packet */ | |
d62a17ae | 317 | void ripng_packet_dump(struct ripng_packet *packet, int size, |
318 | const char *sndrcv) | |
319 | { | |
320 | caddr_t lim; | |
321 | struct rte *rte; | |
322 | const char *command_str; | |
323 | ||
324 | /* Set command string. */ | |
325 | if (packet->command == RIPNG_REQUEST) | |
326 | command_str = "request"; | |
327 | else if (packet->command == RIPNG_RESPONSE) | |
328 | command_str = "response"; | |
329 | else | |
330 | command_str = "unknown"; | |
331 | ||
332 | /* Dump packet header. */ | |
333 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
334 | packet->version, size); | |
335 | ||
336 | /* Dump each routing table entry. */ | |
337 | rte = packet->rte; | |
338 | ||
339 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
340 | if (rte->metric == RIPNG_METRIC_NEXTHOP) | |
2e5b3f37 | 341 | zlog_debug(" nexthop %pI6/%d", &rte->addr, |
d62a17ae | 342 | rte->prefixlen); |
343 | else | |
2e5b3f37 MS |
344 | zlog_debug(" %pI6/%d metric %d tag %" ROUTE_TAG_PRI, |
345 | &rte->addr, rte->prefixlen, | |
d62a17ae | 346 | rte->metric, (route_tag_t)ntohs(rte->tag)); |
347 | } | |
718e3744 | 348 | } |
349 | ||
350 | /* RIPng next hop address RTE (Route Table Entry). */ | |
d62a17ae | 351 | static void ripng_nexthop_rte(struct rte *rte, struct sockaddr_in6 *from, |
352 | struct ripng_nexthop *nexthop) | |
353 | { | |
d62a17ae | 354 | /* Logging before checking RTE. */ |
355 | if (IS_RIPNG_DEBUG_RECV) | |
2e5b3f37 | 356 | zlog_debug("RIPng nexthop RTE address %pI6 tag %" ROUTE_TAG_PRI |
d62a17ae | 357 | " prefixlen %d", |
2e5b3f37 | 358 | &rte->addr, (route_tag_t)ntohs(rte->tag), |
d62a17ae | 359 | rte->prefixlen); |
360 | ||
361 | /* RFC2080 2.1.1 Next Hop: | |
362 | The route tag and prefix length in the next hop RTE must be | |
363 | set to zero on sending and ignored on receiption. */ | |
364 | if (ntohs(rte->tag) != 0) | |
365 | zlog_warn( | |
366 | "RIPng nexthop RTE with non zero tag value %" ROUTE_TAG_PRI | |
2e5b3f37 MS |
367 | " from %pI6", |
368 | (route_tag_t)ntohs(rte->tag), &from->sin6_addr); | |
d62a17ae | 369 | |
370 | if (rte->prefixlen != 0) | |
371 | zlog_warn( | |
2e5b3f37 MS |
372 | "RIPng nexthop RTE with non zero prefixlen value %d from %pI6", |
373 | rte->prefixlen, &from->sin6_addr); | |
d62a17ae | 374 | |
375 | /* Specifying a value of 0:0:0:0:0:0:0:0 in the prefix field of a | |
376 | next hop RTE indicates that the next hop address should be the | |
377 | originator of the RIPng advertisement. An address specified as a | |
378 | next hop must be a link-local address. */ | |
379 | if (IN6_IS_ADDR_UNSPECIFIED(&rte->addr)) { | |
380 | nexthop->flag = RIPNG_NEXTHOP_UNSPEC; | |
381 | memset(&nexthop->address, 0, sizeof(struct in6_addr)); | |
382 | return; | |
383 | } | |
718e3744 | 384 | |
d62a17ae | 385 | if (IN6_IS_ADDR_LINKLOCAL(&rte->addr)) { |
386 | nexthop->flag = RIPNG_NEXTHOP_ADDRESS; | |
387 | IPV6_ADDR_COPY(&nexthop->address, &rte->addr); | |
388 | return; | |
389 | } | |
718e3744 | 390 | |
d62a17ae | 391 | /* The purpose of the next hop RTE is to eliminate packets being |
392 | routed through extra hops in the system. It is particularly useful | |
393 | when RIPng is not being run on all of the routers on a network. | |
394 | Note that next hop RTE is "advisory". That is, if the provided | |
395 | information is ignored, a possibly sub-optimal, but absolutely | |
396 | valid, route may be taken. If the received next hop address is not | |
397 | a link-local address, it should be treated as 0:0:0:0:0:0:0:0. */ | |
2e5b3f37 MS |
398 | zlog_warn("RIPng nexthop RTE with non link-local address %pI6 from %pI6", |
399 | &rte->addr, &from->sin6_addr); | |
718e3744 | 400 | |
d62a17ae | 401 | nexthop->flag = RIPNG_NEXTHOP_UNSPEC; |
402 | memset(&nexthop->address, 0, sizeof(struct in6_addr)); | |
718e3744 | 403 | |
d62a17ae | 404 | return; |
718e3744 | 405 | } |
406 | ||
407 | /* If ifp has same link-local address then return 1. */ | |
d62a17ae | 408 | static int ripng_lladdr_check(struct interface *ifp, struct in6_addr *addr) |
718e3744 | 409 | { |
d62a17ae | 410 | struct listnode *node; |
411 | struct connected *connected; | |
412 | struct prefix *p; | |
718e3744 | 413 | |
d62a17ae | 414 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) { |
415 | p = connected->address; | |
718e3744 | 416 | |
d62a17ae | 417 | if (p->family == AF_INET6 |
418 | && IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6) | |
419 | && IN6_ARE_ADDR_EQUAL(&p->u.prefix6, addr)) | |
420 | return 1; | |
421 | } | |
422 | return 0; | |
718e3744 | 423 | } |
424 | ||
425 | /* RIPng route garbage collect timer. */ | |
cc9f21da | 426 | static void ripng_garbage_collect(struct thread *t) |
718e3744 | 427 | { |
d62a17ae | 428 | struct ripng_info *rinfo; |
fe08ba7e | 429 | struct agg_node *rp; |
718e3744 | 430 | |
d62a17ae | 431 | rinfo = THREAD_ARG(t); |
718e3744 | 432 | |
d62a17ae | 433 | /* Off timeout timer. */ |
434 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
718e3744 | 435 | |
d62a17ae | 436 | /* Get route_node pointer. */ |
437 | rp = rinfo->rp; | |
438 | ||
439 | /* Unlock route_node. */ | |
440 | listnode_delete(rp->info, rinfo); | |
441 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 442 | list_delete((struct list **)&rp->info); |
fe08ba7e | 443 | agg_unlock_node(rp); |
d62a17ae | 444 | } |
718e3744 | 445 | |
d62a17ae | 446 | /* Free RIPng routing information. */ |
447 | ripng_info_free(rinfo); | |
718e3744 | 448 | } |
449 | ||
5c84b9a5 | 450 | static void ripng_timeout_update(struct ripng *ripng, struct ripng_info *rinfo); |
c880b636 FL |
451 | |
452 | /* Add new route to the ECMP list. | |
fac76f9c FL |
453 | * RETURN: the new entry added in the list, or NULL if it is not the first |
454 | * entry and ECMP is not allowed. | |
c880b636 | 455 | */ |
5c84b9a5 RW |
456 | struct ripng_info *ripng_ecmp_add(struct ripng *ripng, |
457 | struct ripng_info *rinfo_new) | |
718e3744 | 458 | { |
fe08ba7e | 459 | struct agg_node *rp = rinfo_new->rp; |
d62a17ae | 460 | struct ripng_info *rinfo = NULL; |
461 | struct list *list = NULL; | |
718e3744 | 462 | |
d62a17ae | 463 | if (rp->info == NULL) |
464 | rp->info = list_new(); | |
465 | list = (struct list *)rp->info; | |
718e3744 | 466 | |
d62a17ae | 467 | /* If ECMP is not allowed and some entry already exists in the list, |
468 | * do nothing. */ | |
469 | if (listcount(list) && !ripng->ecmp) | |
470 | return NULL; | |
fac76f9c | 471 | |
d62a17ae | 472 | rinfo = ripng_info_new(); |
473 | memcpy(rinfo, rinfo_new, sizeof(struct ripng_info)); | |
474 | listnode_add(list, rinfo); | |
c880b636 | 475 | |
d62a17ae | 476 | if (ripng_route_rte(rinfo)) { |
5c84b9a5 RW |
477 | ripng_timeout_update(ripng, rinfo); |
478 | ripng_zebra_ipv6_add(ripng, rp); | |
d62a17ae | 479 | } |
c880b636 | 480 | |
d62a17ae | 481 | ripng_aggregate_increment(rp, rinfo); |
c880b636 | 482 | |
d62a17ae | 483 | /* Set the route change flag on the first entry. */ |
484 | rinfo = listgetdata(listhead(list)); | |
485 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 486 | |
d62a17ae | 487 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 488 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
c880b636 | 489 | |
d62a17ae | 490 | return rinfo; |
c880b636 FL |
491 | } |
492 | ||
493 | /* Replace the ECMP list with the new route. | |
494 | * RETURN: the new entry added in the list | |
495 | */ | |
5c84b9a5 RW |
496 | struct ripng_info *ripng_ecmp_replace(struct ripng *ripng, |
497 | struct ripng_info *rinfo_new) | |
d62a17ae | 498 | { |
fe08ba7e | 499 | struct agg_node *rp = rinfo_new->rp; |
d62a17ae | 500 | struct list *list = (struct list *)rp->info; |
501 | struct ripng_info *rinfo = NULL, *tmp_rinfo = NULL; | |
502 | struct listnode *node = NULL, *nextnode = NULL; | |
503 | ||
504 | if (list == NULL || listcount(list) == 0) | |
5c84b9a5 | 505 | return ripng_ecmp_add(ripng, rinfo_new); |
d62a17ae | 506 | |
507 | /* Get the first entry */ | |
508 | rinfo = listgetdata(listhead(list)); | |
509 | ||
510 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
511 | if (ripng_route_rte(rinfo) && !ripng_route_rte(rinfo_new)) | |
512 | if (CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
5c84b9a5 | 513 | ripng_zebra_ipv6_delete(ripng, rp); |
d62a17ae | 514 | |
515 | if (rinfo->metric != RIPNG_METRIC_INFINITY) | |
516 | ripng_aggregate_decrement_list(rp, list); | |
517 | ||
518 | /* Re-use the first entry, and delete the others. */ | |
519 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
520 | if (tmp_rinfo != rinfo) { | |
521 | RIPNG_TIMER_OFF(tmp_rinfo->t_timeout); | |
522 | RIPNG_TIMER_OFF(tmp_rinfo->t_garbage_collect); | |
523 | list_delete_node(list, node); | |
524 | ripng_info_free(tmp_rinfo); | |
525 | } | |
c880b636 | 526 | |
d62a17ae | 527 | RIPNG_TIMER_OFF(rinfo->t_timeout); |
528 | RIPNG_TIMER_OFF(rinfo->t_garbage_collect); | |
529 | memcpy(rinfo, rinfo_new, sizeof(struct ripng_info)); | |
c880b636 | 530 | |
d62a17ae | 531 | if (ripng_route_rte(rinfo)) { |
5c84b9a5 | 532 | ripng_timeout_update(ripng, rinfo); |
d62a17ae | 533 | /* The ADD message implies an update. */ |
5c84b9a5 | 534 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 535 | } |
536 | ||
537 | ripng_aggregate_increment(rp, rinfo); | |
538 | ||
539 | /* Set the route change flag. */ | |
540 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 541 | |
d62a17ae | 542 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 543 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
718e3744 | 544 | |
d62a17ae | 545 | return rinfo; |
c880b636 FL |
546 | } |
547 | ||
548 | /* Delete one route from the ECMP list. | |
549 | * RETURN: | |
550 | * null - the entry is freed, and other entries exist in the list | |
551 | * the entry - the entry is the last one in the list; its metric is set | |
552 | * to INFINITY, and the garbage collector is started for it | |
553 | */ | |
5c84b9a5 RW |
554 | struct ripng_info *ripng_ecmp_delete(struct ripng *ripng, |
555 | struct ripng_info *rinfo) | |
d62a17ae | 556 | { |
fe08ba7e | 557 | struct agg_node *rp = rinfo->rp; |
d62a17ae | 558 | struct list *list = (struct list *)rp->info; |
559 | ||
560 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
561 | ||
562 | if (rinfo->metric != RIPNG_METRIC_INFINITY) | |
563 | ripng_aggregate_decrement(rp, rinfo); | |
564 | ||
565 | if (listcount(list) > 1) { | |
566 | /* Some other ECMP entries still exist. Just delete this entry. | |
567 | */ | |
568 | RIPNG_TIMER_OFF(rinfo->t_garbage_collect); | |
569 | listnode_delete(list, rinfo); | |
570 | if (ripng_route_rte(rinfo) | |
571 | && CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
572 | /* The ADD message implies the update. */ | |
5c84b9a5 | 573 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 574 | ripng_info_free(rinfo); |
575 | rinfo = NULL; | |
576 | } else { | |
577 | assert(rinfo == listgetdata(listhead(list))); | |
578 | ||
579 | /* This is the only entry left in the list. We must keep it in | |
580 | * the list for garbage collection time, with INFINITY metric. | |
581 | */ | |
582 | ||
583 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
584 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, ripng_garbage_collect, | |
585 | ripng->garbage_time); | |
586 | ||
587 | if (ripng_route_rte(rinfo) | |
588 | && CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
5c84b9a5 | 589 | ripng_zebra_ipv6_delete(ripng, rp); |
d62a17ae | 590 | } |
c880b636 | 591 | |
d62a17ae | 592 | /* Set the route change flag on the first entry. */ |
593 | rinfo = listgetdata(listhead(list)); | |
594 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 595 | |
d62a17ae | 596 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 597 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
c880b636 | 598 | |
d62a17ae | 599 | return rinfo; |
c880b636 FL |
600 | } |
601 | ||
602 | /* Timeout RIPng routes. */ | |
cc9f21da | 603 | static void ripng_timeout(struct thread *t) |
c880b636 | 604 | { |
5c84b9a5 RW |
605 | struct ripng_info *rinfo = THREAD_ARG(t); |
606 | struct ripng *ripng = ripng_info_get_instance(rinfo); | |
607 | ||
608 | ripng_ecmp_delete(ripng, rinfo); | |
718e3744 | 609 | } |
610 | ||
5c84b9a5 | 611 | static void ripng_timeout_update(struct ripng *ripng, struct ripng_info *rinfo) |
718e3744 | 612 | { |
d62a17ae | 613 | if (rinfo->metric != RIPNG_METRIC_INFINITY) { |
614 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
5c84b9a5 RW |
615 | thread_add_timer(master, ripng_timeout, rinfo, |
616 | ripng->timeout_time, &rinfo->t_timeout); | |
d62a17ae | 617 | } |
718e3744 | 618 | } |
619 | ||
d62a17ae | 620 | static int ripng_filter(int ripng_distribute, struct prefix_ipv6 *p, |
621 | struct ripng_interface *ri) | |
622 | { | |
623 | struct distribute *dist; | |
624 | struct access_list *alist; | |
625 | struct prefix_list *plist; | |
626 | int distribute = ripng_distribute == RIPNG_FILTER_OUT | |
627 | ? DISTRIBUTE_V6_OUT | |
628 | : DISTRIBUTE_V6_IN; | |
629 | const char *inout = ripng_distribute == RIPNG_FILTER_OUT ? "out" : "in"; | |
630 | ||
631 | /* Input distribute-list filtering. */ | |
632 | if (ri->list[ripng_distribute]) { | |
633 | if (access_list_apply(ri->list[ripng_distribute], | |
634 | (struct prefix *)p) | |
635 | == FILTER_DENY) { | |
636 | if (IS_RIPNG_DEBUG_PACKET) | |
e0259674 | 637 | zlog_debug("%pFX filtered by distribute %s", p, |
d62a17ae | 638 | inout); |
639 | return -1; | |
640 | } | |
641 | } | |
642 | if (ri->prefix[ripng_distribute]) { | |
643 | if (prefix_list_apply(ri->prefix[ripng_distribute], | |
644 | (struct prefix *)p) | |
645 | == PREFIX_DENY) { | |
646 | if (IS_RIPNG_DEBUG_PACKET) | |
e0259674 | 647 | zlog_debug("%pFX filtered by prefix-list %s", p, |
d62a17ae | 648 | inout); |
649 | return -1; | |
a94434b6 | 650 | } |
a94434b6 | 651 | } |
a94434b6 | 652 | |
d62a17ae | 653 | /* All interface filter check. */ |
dde7b15b | 654 | dist = distribute_lookup(ri->ripng->distribute_ctx, NULL); |
d62a17ae | 655 | if (dist) { |
656 | if (dist->list[distribute]) { | |
657 | alist = access_list_lookup(AFI_IP6, | |
658 | dist->list[distribute]); | |
659 | ||
660 | if (alist) { | |
661 | if (access_list_apply(alist, (struct prefix *)p) | |
662 | == FILTER_DENY) { | |
663 | if (IS_RIPNG_DEBUG_PACKET) | |
664 | zlog_debug( | |
e0259674 DS |
665 | "%pFX filtered by distribute %s", |
666 | p, inout); | |
d62a17ae | 667 | return -1; |
668 | } | |
669 | } | |
a94434b6 | 670 | } |
d62a17ae | 671 | if (dist->prefix[distribute]) { |
672 | plist = prefix_list_lookup(AFI_IP6, | |
673 | dist->prefix[distribute]); | |
674 | ||
675 | if (plist) { | |
676 | if (prefix_list_apply(plist, (struct prefix *)p) | |
677 | == PREFIX_DENY) { | |
678 | if (IS_RIPNG_DEBUG_PACKET) | |
679 | zlog_debug( | |
e0259674 DS |
680 | "%pFX filtered by prefix-list %s", |
681 | p, inout); | |
d62a17ae | 682 | return -1; |
683 | } | |
684 | } | |
a94434b6 | 685 | } |
a94434b6 | 686 | } |
d62a17ae | 687 | return 0; |
a94434b6 | 688 | } |
689 | ||
718e3744 | 690 | /* Process RIPng route according to RFC2080. */ |
d62a17ae | 691 | static void ripng_route_process(struct rte *rte, struct sockaddr_in6 *from, |
692 | struct ripng_nexthop *ripng_nexthop, | |
693 | struct interface *ifp) | |
694 | { | |
695 | int ret; | |
696 | struct prefix_ipv6 p; | |
fe08ba7e | 697 | struct agg_node *rp; |
d62a17ae | 698 | struct ripng_info *rinfo = NULL, newinfo; |
699 | struct ripng_interface *ri; | |
5c84b9a5 | 700 | struct ripng *ripng; |
d62a17ae | 701 | struct in6_addr *nexthop; |
702 | int same = 0; | |
703 | struct list *list = NULL; | |
704 | struct listnode *node = NULL; | |
705 | ||
706 | /* Make prefix structure. */ | |
707 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
708 | p.family = AF_INET6; | |
709 | /* p.prefix = rte->addr; */ | |
710 | IPV6_ADDR_COPY(&p.prefix, &rte->addr); | |
711 | p.prefixlen = rte->prefixlen; | |
712 | ||
713 | /* Make sure mask is applied. */ | |
714 | /* XXX We have to check the prefix is valid or not before call | |
715 | apply_mask_ipv6. */ | |
716 | apply_mask_ipv6(&p); | |
717 | ||
d62a17ae | 718 | ri = ifp->info; |
5c84b9a5 | 719 | ripng = ri->ripng; |
d62a17ae | 720 | |
5c84b9a5 | 721 | /* Apply input filters. */ |
d62a17ae | 722 | ret = ripng_filter(RIPNG_FILTER_IN, &p, ri); |
723 | if (ret < 0) | |
724 | return; | |
725 | ||
726 | memset(&newinfo, 0, sizeof(newinfo)); | |
727 | newinfo.type = ZEBRA_ROUTE_RIPNG; | |
728 | newinfo.sub_type = RIPNG_ROUTE_RTE; | |
729 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) | |
730 | newinfo.nexthop = ripng_nexthop->address; | |
731 | else | |
732 | newinfo.nexthop = from->sin6_addr; | |
733 | newinfo.from = from->sin6_addr; | |
734 | newinfo.ifindex = ifp->ifindex; | |
735 | newinfo.metric = rte->metric; | |
736 | newinfo.metric_out = rte->metric; /* XXX */ | |
737 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
738 | ||
739 | /* Modify entry. */ | |
740 | if (ri->routemap[RIPNG_FILTER_IN]) { | |
d62a17ae | 741 | ret = route_map_apply(ri->routemap[RIPNG_FILTER_IN], |
1782514f | 742 | (struct prefix *)&p, &newinfo); |
d62a17ae | 743 | |
744 | if (ret == RMAP_DENYMATCH) { | |
745 | if (IS_RIPNG_DEBUG_PACKET) | |
746 | zlog_debug( | |
2e5b3f37 MS |
747 | "RIPng %pFX is filtered by route-map in", |
748 | &p); | |
d62a17ae | 749 | return; |
750 | } | |
718e3744 | 751 | |
d62a17ae | 752 | /* Get back the object */ |
753 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) { | |
754 | if (!IPV6_ADDR_SAME(&newinfo.nexthop, | |
755 | &ripng_nexthop->address)) { | |
756 | /* the nexthop get changed by the routemap */ | |
757 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop)) | |
758 | ripng_nexthop->address = | |
759 | newinfo.nexthop; | |
760 | else | |
761 | ripng_nexthop->address = in6addr_any; | |
762 | } | |
763 | } else { | |
764 | if (!IPV6_ADDR_SAME(&newinfo.nexthop, | |
765 | &from->sin6_addr)) { | |
766 | /* the nexthop get changed by the routemap */ | |
767 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop)) { | |
768 | ripng_nexthop->flag = | |
769 | RIPNG_NEXTHOP_ADDRESS; | |
770 | ripng_nexthop->address = | |
771 | newinfo.nexthop; | |
772 | } | |
773 | } | |
774 | } | |
775 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
9d303b37 DL |
776 | rte->metric = |
777 | newinfo.metric_out; /* XXX: the routemap uses the | |
778 | metric_out field */ | |
d62a17ae | 779 | } |
a94434b6 | 780 | |
d62a17ae | 781 | /* Once the entry has been validated, update the metric by |
782 | * adding the cost of the network on wich the message | |
783 | * arrived. If the result is greater than infinity, use infinity | |
784 | * (RFC2453 Sec. 3.9.2) | |
785 | **/ | |
786 | ||
787 | /* Zebra ripngd can handle offset-list in. */ | |
5c84b9a5 | 788 | ret = ripng_offset_list_apply_in(ripng, &p, ifp, &rte->metric); |
d62a17ae | 789 | |
790 | /* If offset-list does not modify the metric use interface's | |
791 | * one. */ | |
792 | if (!ret) | |
793 | rte->metric += ifp->metric ? ifp->metric : 1; | |
794 | ||
795 | if (rte->metric > RIPNG_METRIC_INFINITY) | |
796 | rte->metric = RIPNG_METRIC_INFINITY; | |
797 | ||
798 | /* Set nexthop pointer. */ | |
799 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) | |
800 | nexthop = &ripng_nexthop->address; | |
801 | else | |
802 | nexthop = &from->sin6_addr; | |
803 | ||
804 | /* Lookup RIPng routing table. */ | |
fe08ba7e | 805 | rp = agg_node_get(ripng->table, (struct prefix *)&p); |
d62a17ae | 806 | |
807 | newinfo.rp = rp; | |
808 | newinfo.nexthop = *nexthop; | |
809 | newinfo.metric = rte->metric; | |
810 | newinfo.tag = ntohs(rte->tag); | |
811 | ||
812 | /* Check to see whether there is already RIPng route on the table. */ | |
813 | if ((list = rp->info) != NULL) | |
814 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
815 | /* Need to compare with redistributed entry or local | |
816 | * entry */ | |
817 | if (!ripng_route_rte(rinfo)) | |
818 | break; | |
819 | ||
820 | if (IPV6_ADDR_SAME(&rinfo->from, &from->sin6_addr) | |
821 | && IPV6_ADDR_SAME(&rinfo->nexthop, nexthop)) | |
822 | break; | |
823 | ||
824 | if (!listnextnode(node)) { | |
825 | /* Not found in the list */ | |
826 | ||
827 | if (rte->metric > rinfo->metric) { | |
828 | /* New route has a greater metric. | |
829 | * Discard it. */ | |
fe08ba7e | 830 | agg_unlock_node(rp); |
d62a17ae | 831 | return; |
832 | } | |
833 | ||
834 | if (rte->metric < rinfo->metric) | |
835 | /* New route has a smaller metric. | |
836 | * Replace the ECMP list | |
837 | * with the new one in below. */ | |
838 | break; | |
839 | ||
840 | /* Metrics are same. Unless ECMP is disabled, | |
841 | * keep "rinfo" null and | |
842 | * the new route is added in the ECMP list in | |
843 | * below. */ | |
844 | if (!ripng->ecmp) | |
845 | break; | |
846 | } | |
847 | } | |
718e3744 | 848 | |
d62a17ae | 849 | if (rinfo) { |
850 | /* Redistributed route check. */ | |
851 | if (rinfo->type != ZEBRA_ROUTE_RIPNG | |
852 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 853 | agg_unlock_node(rp); |
d62a17ae | 854 | return; |
855 | } | |
a94434b6 | 856 | |
d62a17ae | 857 | /* Local static route. */ |
858 | if (rinfo->type == ZEBRA_ROUTE_RIPNG | |
859 | && ((rinfo->sub_type == RIPNG_ROUTE_STATIC) | |
860 | || (rinfo->sub_type == RIPNG_ROUTE_DEFAULT)) | |
861 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 862 | agg_unlock_node(rp); |
d62a17ae | 863 | return; |
864 | } | |
865 | } | |
a94434b6 | 866 | |
d62a17ae | 867 | if (!rinfo) { |
868 | /* Now, check to see whether there is already an explicit route | |
869 | for the destination prefix. If there is no such route, add | |
870 | this route to the routing table, unless the metric is | |
871 | infinity (there is no point in adding a route which | |
872 | unusable). */ | |
873 | if (rte->metric != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 874 | ripng_ecmp_add(ripng, &newinfo); |
3e7a9652 | 875 | else |
fe08ba7e | 876 | agg_unlock_node(rp); |
d62a17ae | 877 | } else { |
878 | /* If there is an existing route, compare the next hop address | |
879 | to the address of the router from which the datagram came. | |
880 | If this datagram is from the same router as the existing | |
881 | route, reinitialize the timeout. */ | |
882 | same = (IN6_ARE_ADDR_EQUAL(&rinfo->from, &from->sin6_addr) | |
883 | && (rinfo->ifindex == ifp->ifindex)); | |
884 | ||
885 | /* | |
886 | * RFC 2080 - Section 2.4.2: | |
887 | * "If the new metric is the same as the old one, examine the | |
888 | * timeout | |
889 | * for the existing route. If it is at least halfway to the | |
890 | * expiration | |
891 | * point, switch to the new route. This heuristic is optional, | |
892 | * but | |
893 | * highly recommended". | |
894 | */ | |
895 | if (!ripng->ecmp && !same && rinfo->metric == rte->metric | |
896 | && rinfo->t_timeout | |
897 | && (thread_timer_remain_second(rinfo->t_timeout) | |
898 | < (ripng->timeout_time / 2))) { | |
5c84b9a5 | 899 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 900 | } |
901 | /* Next, compare the metrics. If the datagram is from the same | |
902 | router as the existing route, and the new metric is different | |
903 | than the old one; or, if the new metric is lower than the old | |
904 | one; do the following actions: */ | |
905 | else if ((same && rinfo->metric != rte->metric) | |
906 | || rte->metric < rinfo->metric) { | |
907 | if (listcount(list) == 1) { | |
908 | if (newinfo.metric != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 909 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 910 | else |
5c84b9a5 | 911 | ripng_ecmp_delete(ripng, rinfo); |
d62a17ae | 912 | } else { |
913 | if (newinfo.metric < rinfo->metric) | |
5c84b9a5 | 914 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 915 | else /* newinfo.metric > rinfo->metric */ |
5c84b9a5 | 916 | ripng_ecmp_delete(ripng, rinfo); |
d62a17ae | 917 | } |
918 | } else /* same & no change */ | |
5c84b9a5 | 919 | ripng_timeout_update(ripng, rinfo); |
d62a17ae | 920 | |
921 | /* Unlock tempolary lock of the route. */ | |
fe08ba7e | 922 | agg_unlock_node(rp); |
d62a17ae | 923 | } |
718e3744 | 924 | } |
925 | ||
d62a17ae | 926 | /* Add redistributed route to RIPng table. */ |
5c84b9a5 RW |
927 | void ripng_redistribute_add(struct ripng *ripng, int type, int sub_type, |
928 | struct prefix_ipv6 *p, ifindex_t ifindex, | |
929 | struct in6_addr *nexthop, route_tag_t tag) | |
d62a17ae | 930 | { |
fe08ba7e | 931 | struct agg_node *rp; |
d62a17ae | 932 | struct ripng_info *rinfo = NULL, newinfo; |
933 | struct list *list = NULL; | |
934 | ||
935 | /* Redistribute route */ | |
936 | if (IN6_IS_ADDR_LINKLOCAL(&p->prefix)) | |
937 | return; | |
938 | if (IN6_IS_ADDR_LOOPBACK(&p->prefix)) | |
939 | return; | |
940 | ||
fe08ba7e | 941 | rp = agg_node_get(ripng->table, (struct prefix *)p); |
d62a17ae | 942 | |
943 | memset(&newinfo, 0, sizeof(struct ripng_info)); | |
944 | newinfo.type = type; | |
945 | newinfo.sub_type = sub_type; | |
946 | newinfo.ifindex = ifindex; | |
947 | newinfo.metric = 1; | |
948 | if (tag <= UINT16_MAX) /* RIPng only supports 16 bit tags */ | |
949 | newinfo.tag = tag; | |
950 | newinfo.rp = rp; | |
951 | if (nexthop && IN6_IS_ADDR_LINKLOCAL(nexthop)) | |
952 | newinfo.nexthop = *nexthop; | |
953 | ||
954 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
955 | rinfo = listgetdata(listhead(list)); | |
956 | ||
957 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
958 | && rinfo->sub_type == RIPNG_ROUTE_INTERFACE | |
959 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 960 | agg_unlock_node(rp); |
d62a17ae | 961 | return; |
962 | } | |
963 | ||
964 | /* Manually configured RIPng route check. | |
965 | * They have the precedence on all the other entries. | |
966 | **/ | |
967 | if (rinfo->type == ZEBRA_ROUTE_RIPNG | |
968 | && ((rinfo->sub_type == RIPNG_ROUTE_STATIC) | |
969 | || (rinfo->sub_type == RIPNG_ROUTE_DEFAULT))) { | |
970 | if (type != ZEBRA_ROUTE_RIPNG | |
971 | || ((sub_type != RIPNG_ROUTE_STATIC) | |
972 | && (sub_type != RIPNG_ROUTE_DEFAULT))) { | |
fe08ba7e | 973 | agg_unlock_node(rp); |
d62a17ae | 974 | return; |
975 | } | |
976 | } | |
718e3744 | 977 | |
5c84b9a5 | 978 | ripng_ecmp_replace(ripng, &newinfo); |
fe08ba7e | 979 | agg_unlock_node(rp); |
d62a17ae | 980 | } else |
5c84b9a5 | 981 | ripng_ecmp_add(ripng, &newinfo); |
d62a17ae | 982 | |
983 | if (IS_RIPNG_DEBUG_EVENT) { | |
984 | if (!nexthop) | |
985 | zlog_debug( | |
e0259674 DS |
986 | "Redistribute new prefix %pFX on the interface %s", |
987 | p, ifindex2ifname(ifindex, ripng->vrf->vrf_id)); | |
d62a17ae | 988 | else |
989 | zlog_debug( | |
2e5b3f37 MS |
990 | "Redistribute new prefix %pFX with nexthop %pI6 on the interface %s", |
991 | p, nexthop, | |
dde7b15b | 992 | ifindex2ifname(ifindex, ripng->vrf->vrf_id)); |
d62a17ae | 993 | } |
718e3744 | 994 | |
5c84b9a5 | 995 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 996 | } |
718e3744 | 997 | |
d62a17ae | 998 | /* Delete redistributed route to RIPng table. */ |
5c84b9a5 RW |
999 | void ripng_redistribute_delete(struct ripng *ripng, int type, int sub_type, |
1000 | struct prefix_ipv6 *p, ifindex_t ifindex) | |
d62a17ae | 1001 | { |
fe08ba7e | 1002 | struct agg_node *rp; |
d62a17ae | 1003 | struct ripng_info *rinfo; |
1004 | ||
1005 | if (IN6_IS_ADDR_LINKLOCAL(&p->prefix)) | |
1006 | return; | |
1007 | if (IN6_IS_ADDR_LOOPBACK(&p->prefix)) | |
1008 | return; | |
1009 | ||
fe08ba7e | 1010 | rp = agg_node_lookup(ripng->table, (struct prefix *)p); |
d62a17ae | 1011 | |
1012 | if (rp) { | |
1013 | struct list *list = rp->info; | |
1014 | ||
1015 | if (list != NULL && listcount(list) != 0) { | |
1016 | rinfo = listgetdata(listhead(list)); | |
1017 | if (rinfo != NULL && rinfo->type == type | |
1018 | && rinfo->sub_type == sub_type | |
1019 | && rinfo->ifindex == ifindex) { | |
1020 | /* Perform poisoned reverse. */ | |
1021 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
1022 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, | |
1023 | ripng_garbage_collect, | |
1024 | ripng->garbage_time); | |
1025 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
1026 | ||
1027 | /* Aggregate count decrement. */ | |
1028 | ripng_aggregate_decrement(rp, rinfo); | |
1029 | ||
1030 | rinfo->flags |= RIPNG_RTF_CHANGED; | |
1031 | ||
1032 | if (IS_RIPNG_DEBUG_EVENT) | |
1033 | zlog_debug( | |
e0259674 DS |
1034 | "Poisone %pFX on the interface %s with an infinity metric [delete]", |
1035 | p, | |
dde7b15b RW |
1036 | ifindex2ifname( |
1037 | ifindex, | |
1038 | ripng->vrf->vrf_id)); | |
d62a17ae | 1039 | |
5c84b9a5 | 1040 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1041 | } |
1042 | } | |
fe08ba7e | 1043 | agg_unlock_node(rp); |
d62a17ae | 1044 | } |
718e3744 | 1045 | } |
1046 | ||
1047 | /* Withdraw redistributed route. */ | |
5c84b9a5 | 1048 | void ripng_redistribute_withdraw(struct ripng *ripng, int type) |
d62a17ae | 1049 | { |
fe08ba7e | 1050 | struct agg_node *rp; |
d62a17ae | 1051 | struct ripng_info *rinfo = NULL; |
1052 | struct list *list = NULL; | |
1053 | ||
fe08ba7e | 1054 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 1055 | if ((list = rp->info) != NULL) { |
1056 | rinfo = listgetdata(listhead(list)); | |
1057 | if ((rinfo->type == type) | |
1058 | && (rinfo->sub_type != RIPNG_ROUTE_INTERFACE)) { | |
1059 | /* Perform poisoned reverse. */ | |
1060 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
1061 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, | |
1062 | ripng_garbage_collect, | |
1063 | ripng->garbage_time); | |
1064 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
1065 | ||
1066 | /* Aggregate count decrement. */ | |
1067 | ripng_aggregate_decrement(rp, rinfo); | |
1068 | ||
1069 | rinfo->flags |= RIPNG_RTF_CHANGED; | |
1070 | ||
1071 | if (IS_RIPNG_DEBUG_EVENT) { | |
1072 | struct prefix_ipv6 *p = | |
26a3ffd6 DS |
1073 | (struct prefix_ipv6 *) |
1074 | agg_node_get_prefix(rp); | |
d62a17ae | 1075 | |
1076 | zlog_debug( | |
e0259674 DS |
1077 | "Poisone %pFX on the interface %s [withdraw]", |
1078 | p, | |
dde7b15b RW |
1079 | ifindex2ifname( |
1080 | rinfo->ifindex, | |
1081 | ripng->vrf->vrf_id)); | |
d62a17ae | 1082 | } |
1083 | ||
5c84b9a5 | 1084 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1085 | } |
1086 | } | |
1087 | } | |
718e3744 | 1088 | |
d62a17ae | 1089 | /* RIP routing information. */ |
1090 | static void ripng_response_process(struct ripng_packet *packet, int size, | |
1091 | struct sockaddr_in6 *from, | |
1092 | struct interface *ifp, int hoplimit) | |
1093 | { | |
5c84b9a5 RW |
1094 | struct ripng_interface *ri = ifp->info; |
1095 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 1096 | caddr_t lim; |
1097 | struct rte *rte; | |
1098 | struct ripng_nexthop nexthop; | |
1099 | ||
1100 | /* RFC2080 2.4.2 Response Messages: | |
1101 | The Response must be ignored if it is not from the RIPng port. */ | |
1102 | if (ntohs(from->sin6_port) != RIPNG_PORT_DEFAULT) { | |
2e5b3f37 MS |
1103 | zlog_warn("RIPng packet comes from non RIPng port %d from %pI6", |
1104 | ntohs(from->sin6_port), &from->sin6_addr); | |
5c84b9a5 | 1105 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1106 | return; |
1107 | } | |
718e3744 | 1108 | |
d62a17ae | 1109 | /* The datagram's IPv6 source address should be checked to see |
1110 | whether the datagram is from a valid neighbor; the source of the | |
1111 | datagram must be a link-local address. */ | |
1112 | if (!IN6_IS_ADDR_LINKLOCAL(&from->sin6_addr)) { | |
2e5b3f37 MS |
1113 | zlog_warn("RIPng packet comes from non link local address %pI6", |
1114 | &from->sin6_addr); | |
5c84b9a5 | 1115 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1116 | return; |
1117 | } | |
a94434b6 | 1118 | |
d62a17ae | 1119 | /* It is also worth checking to see whether the response is from one |
1120 | of the router's own addresses. Interfaces on broadcast networks | |
1121 | may receive copies of their own multicasts immediately. If a | |
1122 | router processes its own output as new input, confusion is likely, | |
1123 | and such datagrams must be ignored. */ | |
1124 | if (ripng_lladdr_check(ifp, &from->sin6_addr)) { | |
1125 | zlog_warn( | |
2e5b3f37 MS |
1126 | "RIPng packet comes from my own link local address %pI6", |
1127 | &from->sin6_addr); | |
5c84b9a5 | 1128 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1129 | return; |
1130 | } | |
a94434b6 | 1131 | |
d62a17ae | 1132 | /* As an additional check, periodic advertisements must have their |
1133 | hop counts set to 255, and inbound, multicast packets sent from the | |
1134 | RIPng port (i.e. periodic advertisement or triggered update | |
1135 | packets) must be examined to ensure that the hop count is 255. */ | |
1136 | if (hoplimit >= 0 && hoplimit != 255) { | |
1137 | zlog_warn( | |
2e5b3f37 MS |
1138 | "RIPng packet comes with non 255 hop count %d from %pI6", |
1139 | hoplimit, &from->sin6_addr); | |
5c84b9a5 | 1140 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1141 | return; |
1142 | } | |
718e3744 | 1143 | |
d62a17ae | 1144 | /* Update RIPng peer. */ |
5c84b9a5 | 1145 | ripng_peer_update(ripng, from, packet->version); |
a94434b6 | 1146 | |
d62a17ae | 1147 | /* Reset nexthop. */ |
1148 | memset(&nexthop, 0, sizeof(struct ripng_nexthop)); | |
1149 | nexthop.flag = RIPNG_NEXTHOP_UNSPEC; | |
718e3744 | 1150 | |
d62a17ae | 1151 | /* Set RTE pointer. */ |
1152 | rte = packet->rte; | |
718e3744 | 1153 | |
d62a17ae | 1154 | for (lim = ((caddr_t)packet) + size; (caddr_t)rte < lim; rte++) { |
1155 | /* First of all, we have to check this RTE is next hop RTE or | |
1156 | not. Next hop RTE is completely different with normal RTE so | |
1157 | we need special treatment. */ | |
1158 | if (rte->metric == RIPNG_METRIC_NEXTHOP) { | |
1159 | ripng_nexthop_rte(rte, from, &nexthop); | |
1160 | continue; | |
1161 | } | |
718e3744 | 1162 | |
d62a17ae | 1163 | /* RTE information validation. */ |
1164 | ||
1165 | /* - is the destination prefix valid (e.g., not a multicast | |
1166 | prefix and not a link-local address) A link-local address | |
1167 | should never be present in an RTE. */ | |
1168 | if (IN6_IS_ADDR_MULTICAST(&rte->addr)) { | |
1169 | zlog_warn( | |
2e5b3f37 MS |
1170 | "Destination prefix is a multicast address %pI6/%d [%d]", |
1171 | &rte->addr, rte->prefixlen, rte->metric); | |
5c84b9a5 | 1172 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1173 | continue; |
1174 | } | |
1175 | if (IN6_IS_ADDR_LINKLOCAL(&rte->addr)) { | |
1176 | zlog_warn( | |
2e5b3f37 MS |
1177 | "Destination prefix is a link-local address %pI6/%d [%d]", |
1178 | &rte->addr, rte->prefixlen, rte->metric); | |
5c84b9a5 | 1179 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1180 | continue; |
1181 | } | |
1182 | if (IN6_IS_ADDR_LOOPBACK(&rte->addr)) { | |
1183 | zlog_warn( | |
2e5b3f37 MS |
1184 | "Destination prefix is a loopback address %pI6/%d [%d]", |
1185 | &rte->addr, rte->prefixlen, rte->metric); | |
5c84b9a5 | 1186 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1187 | continue; |
1188 | } | |
718e3744 | 1189 | |
d62a17ae | 1190 | /* - is the prefix length valid (i.e., between 0 and 128, |
1191 | inclusive) */ | |
13ccce6e | 1192 | if (rte->prefixlen > IPV6_MAX_BITLEN) { |
2e5b3f37 MS |
1193 | zlog_warn("Invalid prefix length %pI6/%d from %pI6%%%s", |
1194 | &rte->addr, rte->prefixlen, | |
1195 | &from->sin6_addr, ifp->name); | |
5c84b9a5 | 1196 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1197 | continue; |
1198 | } | |
718e3744 | 1199 | |
d62a17ae | 1200 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1201 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
2e5b3f37 MS |
1202 | zlog_warn("Invalid metric %d from %pI6%%%s", |
1203 | rte->metric, &from->sin6_addr, ifp->name); | |
5c84b9a5 | 1204 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1205 | continue; |
1206 | } | |
718e3744 | 1207 | |
d62a17ae | 1208 | /* Vincent: XXX Should we compute the direclty reachable nexthop |
1209 | * for our RIPng network ? | |
1210 | **/ | |
718e3744 | 1211 | |
d62a17ae | 1212 | /* Routing table updates. */ |
1213 | ripng_route_process(rte, from, &nexthop, ifp); | |
1214 | } | |
718e3744 | 1215 | } |
1216 | ||
1217 | /* Response to request message. */ | |
d62a17ae | 1218 | static void ripng_request_process(struct ripng_packet *packet, int size, |
1219 | struct sockaddr_in6 *from, | |
1220 | struct interface *ifp) | |
1221 | { | |
5c84b9a5 | 1222 | struct ripng *ripng; |
d62a17ae | 1223 | caddr_t lim; |
1224 | struct rte *rte; | |
1225 | struct prefix_ipv6 p; | |
fe08ba7e | 1226 | struct agg_node *rp; |
d62a17ae | 1227 | struct ripng_info *rinfo; |
1228 | struct ripng_interface *ri; | |
1229 | ||
1230 | /* Does not reponse to the requests on the loopback interfaces */ | |
1231 | if (if_is_loopback(ifp)) | |
1232 | return; | |
1233 | ||
1234 | /* Check RIPng process is enabled on this interface. */ | |
1235 | ri = ifp->info; | |
1236 | if (!ri->running) | |
1237 | return; | |
5c84b9a5 | 1238 | ripng = ri->ripng; |
d62a17ae | 1239 | |
1240 | /* When passive interface is specified, suppress responses */ | |
1241 | if (ri->passive) | |
1242 | return; | |
1243 | ||
1244 | /* RIPng peer update. */ | |
5c84b9a5 | 1245 | ripng_peer_update(ripng, from, packet->version); |
d62a17ae | 1246 | |
1247 | lim = ((caddr_t)packet) + size; | |
1248 | rte = packet->rte; | |
1249 | ||
1250 | /* The Request is processed entry by entry. If there are no | |
1251 | entries, no response is given. */ | |
1252 | if (lim == (caddr_t)rte) | |
1253 | return; | |
1254 | ||
1255 | /* There is one special case. If there is exactly one entry in the | |
1256 | request, and it has a destination prefix of zero, a prefix length | |
1257 | of zero, and a metric of infinity (i.e., 16), then this is a | |
1258 | request to send the entire routing table. In that case, a call | |
1259 | is made to the output process to send the routing table to the | |
1260 | requesting address/port. */ | |
1261 | if (lim == ((caddr_t)(rte + 1)) && IN6_IS_ADDR_UNSPECIFIED(&rte->addr) | |
1262 | && rte->prefixlen == 0 && rte->metric == RIPNG_METRIC_INFINITY) { | |
1263 | /* All route with split horizon */ | |
1264 | ripng_output_process(ifp, from, ripng_all_route); | |
1265 | } else { | |
1266 | /* Except for this special case, processing is quite simple. | |
1267 | Examine the list of RTEs in the Request one by one. For each | |
1268 | entry, look up the destination in the router's routing | |
1269 | database and, if there is a route, put that route's metric in | |
1270 | the metric field of the RTE. If there is no explicit route | |
1271 | to the specified destination, put infinity in the metric | |
1272 | field. Once all the entries have been filled in, change the | |
1273 | command from Request to Response and send the datagram back | |
1274 | to the requestor. */ | |
1275 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
1276 | p.family = AF_INET6; | |
1277 | ||
1278 | for (; ((caddr_t)rte) < lim; rte++) { | |
1279 | p.prefix = rte->addr; | |
1280 | p.prefixlen = rte->prefixlen; | |
1281 | apply_mask_ipv6(&p); | |
1282 | ||
fe08ba7e | 1283 | rp = agg_node_lookup(ripng->table, (struct prefix *)&p); |
d62a17ae | 1284 | |
1285 | if (rp) { | |
1286 | rinfo = listgetdata( | |
1287 | listhead((struct list *)rp->info)); | |
1288 | rte->metric = rinfo->metric; | |
fe08ba7e | 1289 | agg_unlock_node(rp); |
d62a17ae | 1290 | } else |
1291 | rte->metric = RIPNG_METRIC_INFINITY; | |
1292 | } | |
1293 | packet->command = RIPNG_RESPONSE; | |
1294 | ||
1295 | ripng_send_packet((caddr_t)packet, size, from, ifp); | |
1296 | } | |
718e3744 | 1297 | } |
1298 | ||
1299 | /* First entry point of reading RIPng packet. */ | |
cc9f21da | 1300 | static void ripng_read(struct thread *thread) |
d62a17ae | 1301 | { |
5c84b9a5 | 1302 | struct ripng *ripng = THREAD_ARG(thread); |
d62a17ae | 1303 | int len; |
1304 | int sock; | |
1305 | struct sockaddr_in6 from; | |
1306 | struct ripng_packet *packet; | |
1307 | ifindex_t ifindex = 0; | |
1308 | struct interface *ifp; | |
1309 | int hoplimit = -1; | |
1310 | ||
1311 | /* Check ripng is active and alive. */ | |
1312 | assert(ripng != NULL); | |
1313 | assert(ripng->sock >= 0); | |
1314 | ||
1315 | /* Fetch thread data and set read pointer to empty for event | |
1316 | managing. `sock' sould be same as ripng->sock. */ | |
1317 | sock = THREAD_FD(thread); | |
d62a17ae | 1318 | |
1319 | /* Add myself to the next event. */ | |
5c84b9a5 | 1320 | ripng_event(ripng, RIPNG_READ, sock); |
d62a17ae | 1321 | |
1322 | /* Read RIPng packet. */ | |
1323 | len = ripng_recv_packet(sock, STREAM_DATA(ripng->ibuf), | |
1324 | STREAM_SIZE(ripng->ibuf), &from, &ifindex, | |
1325 | &hoplimit); | |
1326 | if (len < 0) { | |
dde7b15b RW |
1327 | zlog_warn("RIPng recvfrom failed (VRF %s): %s.", |
1328 | ripng->vrf_name, safe_strerror(errno)); | |
cc9f21da | 1329 | return; |
d62a17ae | 1330 | } |
718e3744 | 1331 | |
d62a17ae | 1332 | /* Check RTE boundary. RTE size (Packet length - RIPng header size |
1333 | (4)) must be multiple size of one RTE size (20). */ | |
1334 | if (((len - 4) % 20) != 0) { | |
2e5b3f37 MS |
1335 | zlog_warn("RIPng invalid packet size %d from %pI6 (VRF %s)", |
1336 | len, &from.sin6_addr, ripng->vrf_name); | |
5c84b9a5 | 1337 | ripng_peer_bad_packet(ripng, &from); |
cc9f21da | 1338 | return; |
d62a17ae | 1339 | } |
718e3744 | 1340 | |
d62a17ae | 1341 | packet = (struct ripng_packet *)STREAM_DATA(ripng->ibuf); |
dde7b15b | 1342 | ifp = if_lookup_by_index(ifindex, ripng->vrf->vrf_id); |
718e3744 | 1343 | |
d62a17ae | 1344 | /* RIPng packet received. */ |
1345 | if (IS_RIPNG_DEBUG_EVENT) | |
dde7b15b | 1346 | zlog_debug( |
2e5b3f37 MS |
1347 | "RIPng packet received from %pI6 port %d on %s (VRF %s)", |
1348 | &from.sin6_addr, ntohs(from.sin6_port), | |
dde7b15b | 1349 | ifp ? ifp->name : "unknown", ripng->vrf_name); |
718e3744 | 1350 | |
d62a17ae | 1351 | /* Logging before packet checking. */ |
1352 | if (IS_RIPNG_DEBUG_RECV) | |
1353 | ripng_packet_dump(packet, len, "RECV"); | |
718e3744 | 1354 | |
d62a17ae | 1355 | /* Packet comes from unknown interface. */ |
1356 | if (ifp == NULL) { | |
dde7b15b RW |
1357 | zlog_warn( |
1358 | "RIPng packet comes from unknown interface %d (VRF %s)", | |
1359 | ifindex, ripng->vrf_name); | |
cc9f21da | 1360 | return; |
d62a17ae | 1361 | } |
718e3744 | 1362 | |
d62a17ae | 1363 | /* Packet version mismatch checking. */ |
1364 | if (packet->version != ripng->version) { | |
1365 | zlog_warn( | |
dde7b15b RW |
1366 | "RIPng packet version %d doesn't fit to my version %d (VRF %s)", |
1367 | packet->version, ripng->version, ripng->vrf_name); | |
5c84b9a5 | 1368 | ripng_peer_bad_packet(ripng, &from); |
cc9f21da | 1369 | return; |
d62a17ae | 1370 | } |
718e3744 | 1371 | |
d62a17ae | 1372 | /* Process RIPng packet. */ |
1373 | switch (packet->command) { | |
1374 | case RIPNG_REQUEST: | |
1375 | ripng_request_process(packet, len, &from, ifp); | |
1376 | break; | |
1377 | case RIPNG_RESPONSE: | |
1378 | ripng_response_process(packet, len, &from, ifp, hoplimit); | |
1379 | break; | |
1380 | default: | |
dde7b15b RW |
1381 | zlog_warn("Invalid RIPng command %d (VRF %s)", packet->command, |
1382 | ripng->vrf_name); | |
5c84b9a5 | 1383 | ripng_peer_bad_packet(ripng, &from); |
d62a17ae | 1384 | break; |
1385 | } | |
718e3744 | 1386 | } |
1387 | ||
1388 | /* Walk down the RIPng routing table then clear changed flag. */ | |
5c84b9a5 | 1389 | static void ripng_clear_changed_flag(struct ripng *ripng) |
718e3744 | 1390 | { |
fe08ba7e | 1391 | struct agg_node *rp; |
d62a17ae | 1392 | struct ripng_info *rinfo = NULL; |
1393 | struct list *list = NULL; | |
1394 | struct listnode *listnode = NULL; | |
718e3744 | 1395 | |
fe08ba7e | 1396 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 1397 | if ((list = rp->info) != NULL) |
1398 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
1399 | UNSET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
1400 | /* This flag can be set only on the first entry. | |
1401 | */ | |
1402 | break; | |
1403 | } | |
718e3744 | 1404 | } |
1405 | ||
1406 | /* Regular update of RIPng route. Send all routing formation to RIPng | |
1407 | enabled interface. */ | |
cc9f21da | 1408 | static void ripng_update(struct thread *t) |
718e3744 | 1409 | { |
5c84b9a5 | 1410 | struct ripng *ripng = THREAD_ARG(t); |
d62a17ae | 1411 | struct interface *ifp; |
1412 | struct ripng_interface *ri; | |
718e3744 | 1413 | |
d62a17ae | 1414 | /* Logging update event. */ |
1415 | if (IS_RIPNG_DEBUG_EVENT) | |
1416 | zlog_debug("RIPng update timer expired!"); | |
718e3744 | 1417 | |
d62a17ae | 1418 | /* Supply routes to each interface. */ |
dde7b15b | 1419 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 1420 | ri = ifp->info; |
718e3744 | 1421 | |
d62a17ae | 1422 | if (if_is_loopback(ifp) || !if_is_up(ifp)) |
1423 | continue; | |
718e3744 | 1424 | |
d62a17ae | 1425 | if (!ri->running) |
1426 | continue; | |
718e3744 | 1427 | |
d62a17ae | 1428 | /* When passive interface is specified, suppress announce to the |
1429 | interface. */ | |
1430 | if (ri->passive) | |
1431 | continue; | |
718e3744 | 1432 | |
1e20238a | 1433 | #ifdef RIPNG_ADVANCED |
d62a17ae | 1434 | if (ri->ri_send == RIPNG_SEND_OFF) { |
1435 | if (IS_RIPNG_DEBUG_EVENT) | |
1436 | zlog_debug( | |
1437 | "[Event] RIPng send to if %d is suppressed by config", | |
1438 | ifp->ifindex); | |
1439 | continue; | |
1440 | } | |
718e3744 | 1441 | #endif /* RIPNG_ADVANCED */ |
1442 | ||
d62a17ae | 1443 | ripng_output_process(ifp, NULL, ripng_all_route); |
1444 | } | |
718e3744 | 1445 | |
d62a17ae | 1446 | /* Triggered updates may be suppressed if a regular update is due by |
1447 | the time the triggered update would be sent. */ | |
b3d6bc6e | 1448 | thread_cancel(&ripng->t_triggered_interval); |
d62a17ae | 1449 | ripng->trigger = 0; |
718e3744 | 1450 | |
d62a17ae | 1451 | /* Reset flush event. */ |
5c84b9a5 | 1452 | ripng_event(ripng, RIPNG_UPDATE_EVENT, 0); |
718e3744 | 1453 | } |
1454 | ||
1455 | /* Triggered update interval timer. */ | |
cc9f21da | 1456 | static void ripng_triggered_interval(struct thread *t) |
718e3744 | 1457 | { |
5c84b9a5 RW |
1458 | struct ripng *ripng = THREAD_ARG(t); |
1459 | ||
d62a17ae | 1460 | if (ripng->trigger) { |
1461 | ripng->trigger = 0; | |
1462 | ripng_triggered_update(t); | |
1463 | } | |
d62a17ae | 1464 | } |
718e3744 | 1465 | |
1466 | /* Execute triggered update. */ | |
cc9f21da | 1467 | void ripng_triggered_update(struct thread *t) |
718e3744 | 1468 | { |
5c84b9a5 | 1469 | struct ripng *ripng = THREAD_ARG(t); |
d62a17ae | 1470 | struct interface *ifp; |
1471 | struct ripng_interface *ri; | |
1472 | int interval; | |
718e3744 | 1473 | |
d62a17ae | 1474 | /* Cancel interval timer. */ |
b3d6bc6e | 1475 | thread_cancel(&ripng->t_triggered_interval); |
d62a17ae | 1476 | ripng->trigger = 0; |
718e3744 | 1477 | |
d62a17ae | 1478 | /* Logging triggered update. */ |
1479 | if (IS_RIPNG_DEBUG_EVENT) | |
1480 | zlog_debug("RIPng triggered update!"); | |
718e3744 | 1481 | |
d62a17ae | 1482 | /* Split Horizon processing is done when generating triggered |
1483 | updates as well as normal updates (see section 2.6). */ | |
dde7b15b | 1484 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 1485 | ri = ifp->info; |
718e3744 | 1486 | |
d62a17ae | 1487 | if (if_is_loopback(ifp) || !if_is_up(ifp)) |
1488 | continue; | |
718e3744 | 1489 | |
d62a17ae | 1490 | if (!ri->running) |
1491 | continue; | |
718e3744 | 1492 | |
d62a17ae | 1493 | /* When passive interface is specified, suppress announce to the |
1494 | interface. */ | |
1495 | if (ri->passive) | |
1496 | continue; | |
718e3744 | 1497 | |
d62a17ae | 1498 | ripng_output_process(ifp, NULL, ripng_changed_route); |
1499 | } | |
718e3744 | 1500 | |
d62a17ae | 1501 | /* Once all of the triggered updates have been generated, the route |
1502 | change flags should be cleared. */ | |
5c84b9a5 | 1503 | ripng_clear_changed_flag(ripng); |
718e3744 | 1504 | |
d62a17ae | 1505 | /* After a triggered update is sent, a timer should be set for a |
1506 | random interval between 1 and 5 seconds. If other changes that | |
1507 | would trigger updates occur before the timer expires, a single | |
1508 | update is triggered when the timer expires. */ | |
5920b3eb | 1509 | interval = (frr_weak_random() % 5) + 1; |
718e3744 | 1510 | |
5c84b9a5 | 1511 | thread_add_timer(master, ripng_triggered_interval, ripng, interval, |
d62a17ae | 1512 | &ripng->t_triggered_interval); |
718e3744 | 1513 | } |
1514 | ||
1515 | /* Write routing table entry to the stream and return next index of | |
1516 | the routing table entry in the stream. */ | |
d62a17ae | 1517 | int ripng_write_rte(int num, struct stream *s, struct prefix_ipv6 *p, |
d7c0a89a | 1518 | struct in6_addr *nexthop, uint16_t tag, uint8_t metric) |
d62a17ae | 1519 | { |
1520 | /* RIPng packet header. */ | |
1521 | if (num == 0) { | |
1522 | stream_putc(s, RIPNG_RESPONSE); | |
1523 | stream_putc(s, RIPNG_V1); | |
1524 | stream_putw(s, 0); | |
1525 | } | |
718e3744 | 1526 | |
d62a17ae | 1527 | /* Write routing table entry. */ |
b575a12c A |
1528 | if (!nexthop) { |
1529 | assert(p); | |
d7c0a89a | 1530 | stream_write(s, (uint8_t *)&p->prefix, sizeof(struct in6_addr)); |
b575a12c | 1531 | } else |
d7c0a89a | 1532 | stream_write(s, (uint8_t *)nexthop, sizeof(struct in6_addr)); |
d62a17ae | 1533 | stream_putw(s, tag); |
1534 | if (p) | |
1535 | stream_putc(s, p->prefixlen); | |
1536 | else | |
1537 | stream_putc(s, 0); | |
1538 | stream_putc(s, metric); | |
718e3744 | 1539 | |
d62a17ae | 1540 | return ++num; |
718e3744 | 1541 | } |
1542 | ||
1543 | /* Send RESPONSE message to specified destination. */ | |
d62a17ae | 1544 | void ripng_output_process(struct interface *ifp, struct sockaddr_in6 *to, |
1545 | int route_type) | |
1546 | { | |
5c84b9a5 | 1547 | struct ripng *ripng; |
d62a17ae | 1548 | int ret; |
fe08ba7e | 1549 | struct agg_node *rp; |
d62a17ae | 1550 | struct ripng_info *rinfo; |
1551 | struct ripng_interface *ri; | |
1552 | struct ripng_aggregate *aggregate; | |
1553 | struct prefix_ipv6 *p; | |
1554 | struct list *ripng_rte_list; | |
1555 | struct list *list = NULL; | |
1556 | struct listnode *listnode = NULL; | |
1557 | ||
1558 | if (IS_RIPNG_DEBUG_EVENT) { | |
1559 | if (to) | |
2e5b3f37 MS |
1560 | zlog_debug("RIPng update routes to neighbor %pI6", |
1561 | &to->sin6_addr); | |
d62a17ae | 1562 | else |
1563 | zlog_debug("RIPng update routes on interface %s", | |
1564 | ifp->name); | |
1565 | } | |
a94434b6 | 1566 | |
5c84b9a5 | 1567 | /* Get RIPng interface and instance. */ |
d62a17ae | 1568 | ri = ifp->info; |
5c84b9a5 | 1569 | ripng = ri->ripng; |
d62a17ae | 1570 | |
1571 | ripng_rte_list = ripng_rte_new(); | |
1572 | ||
fe08ba7e | 1573 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { |
d62a17ae | 1574 | if ((list = rp->info) != NULL |
1575 | && (rinfo = listgetdata(listhead(list))) != NULL | |
1576 | && rinfo->suppress == 0) { | |
1577 | /* If no route-map are applied, the RTE will be these | |
1578 | * following | |
0437e105 | 1579 | * information. |
d62a17ae | 1580 | */ |
26a3ffd6 | 1581 | p = (struct prefix_ipv6 *)agg_node_get_prefix(rp); |
d62a17ae | 1582 | rinfo->metric_out = rinfo->metric; |
1583 | rinfo->tag_out = rinfo->tag; | |
1584 | memset(&rinfo->nexthop_out, 0, | |
1585 | sizeof(rinfo->nexthop_out)); | |
1586 | /* In order to avoid some local loops, | |
1587 | * if the RIPng route has a nexthop via this interface, | |
1588 | * keep the nexthop, | |
1589 | * otherwise set it to 0. The nexthop should not be | |
1590 | * propagated | |
1591 | * beyond the local broadcast/multicast area in order | |
1592 | * to avoid an IGP multi-level recursive look-up. | |
1593 | */ | |
1594 | if (rinfo->ifindex == ifp->ifindex) | |
1595 | rinfo->nexthop_out = rinfo->nexthop; | |
1596 | ||
1597 | /* Apply output filters. */ | |
1598 | ret = ripng_filter(RIPNG_FILTER_OUT, p, ri); | |
1599 | if (ret < 0) | |
1600 | continue; | |
1601 | ||
1602 | /* Changed route only output. */ | |
1603 | if (route_type == ripng_changed_route | |
1604 | && (!(rinfo->flags & RIPNG_RTF_CHANGED))) | |
1605 | continue; | |
1606 | ||
1607 | /* Split horizon. */ | |
1608 | if (ri->split_horizon == RIPNG_SPLIT_HORIZON) { | |
1609 | /* We perform split horizon for RIPng routes. */ | |
1610 | int suppress = 0; | |
1611 | struct ripng_info *tmp_rinfo = NULL; | |
1612 | ||
1613 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
1614 | tmp_rinfo)) | |
1615 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIPNG | |
1616 | && tmp_rinfo->ifindex | |
1617 | == ifp->ifindex) { | |
1618 | suppress = 1; | |
1619 | break; | |
1620 | } | |
1621 | if (suppress) | |
1622 | continue; | |
1623 | } | |
1624 | ||
1625 | /* Preparation for route-map. */ | |
1626 | rinfo->metric_set = 0; | |
1627 | /* nexthop_out, | |
1628 | * metric_out | |
1629 | * and tag_out are already initialized. | |
1630 | */ | |
1631 | ||
1632 | /* Interface route-map */ | |
1633 | if (ri->routemap[RIPNG_FILTER_OUT]) { | |
d62a17ae | 1634 | ret = route_map_apply( |
1635 | ri->routemap[RIPNG_FILTER_OUT], | |
1782514f | 1636 | (struct prefix *)p, rinfo); |
d62a17ae | 1637 | |
1638 | if (ret == RMAP_DENYMATCH) { | |
1639 | if (IS_RIPNG_DEBUG_PACKET) | |
1640 | zlog_debug( | |
e0259674 DS |
1641 | "RIPng %pFX is filtered by route-map out", |
1642 | p); | |
d62a17ae | 1643 | continue; |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* Redistribute route-map. */ | |
f9120f71 RW |
1648 | if (ripng->redist[rinfo->type].route_map.name) { |
1649 | ret = route_map_apply(ripng->redist[rinfo->type] | |
1650 | .route_map.map, | |
1651 | (struct prefix *)p, | |
1782514f | 1652 | rinfo); |
d62a17ae | 1653 | |
1654 | if (ret == RMAP_DENYMATCH) { | |
1655 | if (IS_RIPNG_DEBUG_PACKET) | |
1656 | zlog_debug( | |
e0259674 DS |
1657 | "RIPng %pFX is filtered by route-map", |
1658 | p); | |
d62a17ae | 1659 | continue; |
1660 | } | |
1661 | } | |
1662 | ||
1663 | /* When the route-map does not set metric. */ | |
1664 | if (!rinfo->metric_set) { | |
1665 | /* If the redistribute metric is set. */ | |
f9120f71 | 1666 | if (ripng->redist[rinfo->type].metric_config |
d62a17ae | 1667 | && rinfo->metric != RIPNG_METRIC_INFINITY) { |
1668 | rinfo->metric_out = | |
f9120f71 | 1669 | ripng->redist[rinfo->type] |
d62a17ae | 1670 | .metric; |
1671 | } else { | |
1672 | /* If the route is not connected or | |
1673 | localy generated | |
1674 | one, use default-metric value */ | |
1675 | if (rinfo->type != ZEBRA_ROUTE_RIPNG | |
1676 | && rinfo->type | |
1677 | != ZEBRA_ROUTE_CONNECT | |
1678 | && rinfo->metric | |
1679 | != RIPNG_METRIC_INFINITY) | |
1680 | rinfo->metric_out = | |
1681 | ripng->default_metric; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | /* Apply offset-list */ | |
1686 | if (rinfo->metric_out != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 1687 | ripng_offset_list_apply_out(ripng, p, ifp, |
d62a17ae | 1688 | &rinfo->metric_out); |
1689 | ||
1690 | if (rinfo->metric_out > RIPNG_METRIC_INFINITY) | |
1691 | rinfo->metric_out = RIPNG_METRIC_INFINITY; | |
1692 | ||
1693 | /* Perform split-horizon with poisoned reverse | |
1694 | * for RIPng routes. | |
1695 | **/ | |
1696 | if (ri->split_horizon | |
1697 | == RIPNG_SPLIT_HORIZON_POISONED_REVERSE) { | |
1698 | struct ripng_info *tmp_rinfo = NULL; | |
1699 | ||
1700 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
1701 | tmp_rinfo)) | |
1702 | if ((tmp_rinfo->type | |
1703 | == ZEBRA_ROUTE_RIPNG) | |
1704 | && tmp_rinfo->ifindex | |
1705 | == ifp->ifindex) | |
1706 | rinfo->metric_out = | |
1707 | RIPNG_METRIC_INFINITY; | |
1708 | } | |
1709 | ||
1710 | /* Add RTE to the list */ | |
1711 | ripng_rte_add(ripng_rte_list, p, rinfo, NULL); | |
718e3744 | 1712 | } |
a94434b6 | 1713 | |
d62a17ae | 1714 | /* Process the aggregated RTE entry */ |
1715 | if ((aggregate = rp->aggregate) != NULL && aggregate->count > 0 | |
1716 | && aggregate->suppress == 0) { | |
1717 | /* If no route-map are applied, the RTE will be these | |
1718 | * following | |
0437e105 | 1719 | * information. |
d62a17ae | 1720 | */ |
26a3ffd6 | 1721 | p = (struct prefix_ipv6 *)agg_node_get_prefix(rp); |
d62a17ae | 1722 | aggregate->metric_set = 0; |
1723 | aggregate->metric_out = aggregate->metric; | |
1724 | aggregate->tag_out = aggregate->tag; | |
1725 | memset(&aggregate->nexthop_out, 0, | |
1726 | sizeof(aggregate->nexthop_out)); | |
1727 | ||
1728 | /* Apply output filters.*/ | |
1729 | ret = ripng_filter(RIPNG_FILTER_OUT, p, ri); | |
1730 | if (ret < 0) | |
1731 | continue; | |
1732 | ||
1733 | /* Interface route-map */ | |
1734 | if (ri->routemap[RIPNG_FILTER_OUT]) { | |
d62a17ae | 1735 | struct ripng_info newinfo; |
1736 | ||
1737 | /* let's cast the aggregate structure to | |
1738 | * ripng_info */ | |
1739 | memset(&newinfo, 0, sizeof(struct ripng_info)); | |
1740 | /* the nexthop is :: */ | |
1741 | newinfo.metric = aggregate->metric; | |
1742 | newinfo.metric_out = aggregate->metric_out; | |
1743 | newinfo.tag = aggregate->tag; | |
1744 | newinfo.tag_out = aggregate->tag_out; | |
1745 | ||
1746 | ret = route_map_apply( | |
1747 | ri->routemap[RIPNG_FILTER_OUT], | |
1782514f | 1748 | (struct prefix *)p, &newinfo); |
d62a17ae | 1749 | |
1750 | if (ret == RMAP_DENYMATCH) { | |
1751 | if (IS_RIPNG_DEBUG_PACKET) | |
1752 | zlog_debug( | |
e0259674 DS |
1753 | "RIPng %pFX is filtered by route-map out", |
1754 | p); | |
d62a17ae | 1755 | continue; |
1756 | } | |
1757 | ||
1758 | aggregate->metric_out = newinfo.metric_out; | |
1759 | aggregate->tag_out = newinfo.tag_out; | |
1760 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop_out)) | |
1761 | aggregate->nexthop_out = | |
1762 | newinfo.nexthop_out; | |
1763 | } | |
1764 | ||
1765 | /* There is no redistribute routemap for the aggregated | |
1766 | * RTE */ | |
1767 | ||
1768 | /* Changed route only output. */ | |
1769 | /* XXX, vincent, in order to increase time convergence, | |
1770 | * it should be announced if a child has changed. | |
1771 | */ | |
1772 | if (route_type == ripng_changed_route) | |
1773 | continue; | |
1774 | ||
1775 | /* Apply offset-list */ | |
1776 | if (aggregate->metric_out != RIPNG_METRIC_INFINITY) | |
1777 | ripng_offset_list_apply_out( | |
5c84b9a5 | 1778 | ripng, p, ifp, &aggregate->metric_out); |
d62a17ae | 1779 | |
1780 | if (aggregate->metric_out > RIPNG_METRIC_INFINITY) | |
1781 | aggregate->metric_out = RIPNG_METRIC_INFINITY; | |
1782 | ||
1783 | /* Add RTE to the list */ | |
1784 | ripng_rte_add(ripng_rte_list, p, NULL, aggregate); | |
1785 | } | |
718e3744 | 1786 | } |
1787 | ||
d62a17ae | 1788 | /* Flush the list */ |
1789 | ripng_rte_send(ripng_rte_list, ifp, to); | |
1790 | ripng_rte_free(ripng_rte_list); | |
718e3744 | 1791 | } |
1792 | ||
5c84b9a5 RW |
1793 | struct ripng *ripng_lookup_by_vrf_id(vrf_id_t vrf_id) |
1794 | { | |
1795 | struct vrf *vrf; | |
1796 | ||
1797 | vrf = vrf_lookup_by_id(vrf_id); | |
1798 | if (!vrf) | |
1799 | return NULL; | |
1800 | ||
1801 | return vrf->info; | |
1802 | } | |
1803 | ||
dde7b15b RW |
1804 | struct ripng *ripng_lookup_by_vrf_name(const char *vrf_name) |
1805 | { | |
1806 | struct ripng ripng; | |
1807 | ||
1808 | ripng.vrf_name = (char *)vrf_name; | |
1809 | ||
1810 | return RB_FIND(ripng_instance_head, &ripng_instances, &ripng); | |
1811 | } | |
1812 | ||
718e3744 | 1813 | /* Create new RIPng instance and set it to global variable. */ |
dde7b15b | 1814 | struct ripng *ripng_create(const char *vrf_name, struct vrf *vrf, int socket) |
718e3744 | 1815 | { |
5c84b9a5 | 1816 | struct ripng *ripng; |
718e3744 | 1817 | |
d62a17ae | 1818 | /* Allocaste RIPng instance. */ |
1819 | ripng = XCALLOC(MTYPE_RIPNG, sizeof(struct ripng)); | |
dde7b15b | 1820 | ripng->vrf_name = XSTRDUP(MTYPE_RIPNG_VRF_NAME, vrf_name); |
718e3744 | 1821 | |
d62a17ae | 1822 | /* Default version and timer values. */ |
1823 | ripng->version = RIPNG_V1; | |
9a12e9e5 RW |
1824 | ripng->update_time = yang_get_default_uint32( |
1825 | "%s/timers/update-interval", RIPNG_INSTANCE); | |
1826 | ripng->timeout_time = yang_get_default_uint32( | |
1827 | "%s/timers/holddown-interval", RIPNG_INSTANCE); | |
1828 | ripng->garbage_time = yang_get_default_uint32( | |
1829 | "%s/timers/flush-interval", RIPNG_INSTANCE); | |
1830 | ripng->default_metric = | |
1831 | yang_get_default_uint8("%s/default-metric", RIPNG_INSTANCE); | |
1832 | ripng->ecmp = yang_get_default_bool("%s/allow-ecmp", RIPNG_INSTANCE); | |
d62a17ae | 1833 | |
1834 | /* Make buffer. */ | |
1835 | ripng->ibuf = stream_new(RIPNG_MAX_PACKET_SIZE * 5); | |
1836 | ripng->obuf = stream_new(RIPNG_MAX_PACKET_SIZE); | |
1837 | ||
b0ba762f | 1838 | /* Initialize RIPng data structures. */ |
fe08ba7e | 1839 | ripng->table = agg_table_init(); |
5c84b9a5 | 1840 | agg_set_table_info(ripng->table, ripng); |
ecece94c RW |
1841 | ripng->peer_list = list_new(); |
1842 | ripng->peer_list->cmp = (int (*)(void *, void *))ripng_peer_list_cmp; | |
56bf1cb2 | 1843 | ripng->peer_list->del = ripng_peer_list_del; |
b0ba762f | 1844 | ripng->enable_if = vector_init(1); |
29b94d58 | 1845 | ripng->enable_network = agg_table_init(); |
0c32404f | 1846 | ripng->passive_interface = vector_init(1); |
26c6be93 RW |
1847 | ripng->offset_list_master = list_new(); |
1848 | ripng->offset_list_master->cmp = | |
1849 | (int (*)(void *, void *))offset_list_cmp; | |
1850 | ripng->offset_list_master->del = | |
6c4c3561 | 1851 | (void (*)(void *))ripng_offset_list_free; |
dde7b15b | 1852 | ripng->distribute_ctx = distribute_list_ctx_create(vrf); |
03a38493 PG |
1853 | distribute_list_add_hook(ripng->distribute_ctx, |
1854 | ripng_distribute_update); | |
1855 | distribute_list_delete_hook(ripng->distribute_ctx, | |
1856 | ripng_distribute_update); | |
718e3744 | 1857 | |
4b23867c | 1858 | /* if rmap install. */ |
8f88441d | 1859 | ripng->if_rmap_ctx = if_rmap_ctx_create(vrf_name); |
4b23867c PG |
1860 | if_rmap_hook_add(ripng->if_rmap_ctx, ripng_if_rmap_update); |
1861 | if_rmap_hook_delete(ripng->if_rmap_ctx, ripng_if_rmap_update); | |
5c84b9a5 | 1862 | |
dde7b15b RW |
1863 | /* Enable the routing instance if possible. */ |
1864 | if (vrf && vrf_is_enabled(vrf)) | |
1865 | ripng_instance_enable(ripng, vrf, socket); | |
1866 | else { | |
1867 | ripng->vrf = NULL; | |
1868 | ripng->sock = -1; | |
5c84b9a5 RW |
1869 | } |
1870 | ||
dde7b15b RW |
1871 | RB_INSERT(ripng_instance_head, &ripng_instances, ripng); |
1872 | ||
5c84b9a5 | 1873 | return ripng; |
718e3744 | 1874 | } |
1875 | ||
a94434b6 | 1876 | /* Send RIPng request to the interface. */ |
d62a17ae | 1877 | int ripng_request(struct interface *ifp) |
718e3744 | 1878 | { |
d62a17ae | 1879 | struct rte *rte; |
1880 | struct ripng_packet ripng_packet; | |
718e3744 | 1881 | |
d62a17ae | 1882 | /* In default ripd doesn't send RIP_REQUEST to the loopback interface. |
1883 | */ | |
1884 | if (if_is_loopback(ifp)) | |
1885 | return 0; | |
a94434b6 | 1886 | |
d62a17ae | 1887 | /* If interface is down, don't send RIP packet. */ |
1888 | if (!if_is_up(ifp)) | |
1889 | return 0; | |
a94434b6 | 1890 | |
d62a17ae | 1891 | if (IS_RIPNG_DEBUG_EVENT) |
1892 | zlog_debug("RIPng send request to %s", ifp->name); | |
718e3744 | 1893 | |
d62a17ae | 1894 | memset(&ripng_packet, 0, sizeof(ripng_packet)); |
1895 | ripng_packet.command = RIPNG_REQUEST; | |
1896 | ripng_packet.version = RIPNG_V1; | |
1897 | rte = ripng_packet.rte; | |
1898 | rte->metric = RIPNG_METRIC_INFINITY; | |
718e3744 | 1899 | |
d62a17ae | 1900 | return ripng_send_packet((caddr_t)&ripng_packet, sizeof(ripng_packet), |
1901 | NULL, ifp); | |
718e3744 | 1902 | } |
1903 | ||
6b0655a2 | 1904 | |
d62a17ae | 1905 | static int ripng_update_jitter(int time) |
718e3744 | 1906 | { |
5920b3eb | 1907 | return ((frr_weak_random() % (time + 1)) - (time / 2)); |
718e3744 | 1908 | } |
1909 | ||
5c84b9a5 | 1910 | void ripng_event(struct ripng *ripng, enum ripng_event event, int sock) |
718e3744 | 1911 | { |
d62a17ae | 1912 | int jitter = 0; |
718e3744 | 1913 | |
d62a17ae | 1914 | switch (event) { |
1915 | case RIPNG_READ: | |
5c84b9a5 RW |
1916 | thread_add_read(master, ripng_read, ripng, sock, |
1917 | &ripng->t_read); | |
d62a17ae | 1918 | break; |
1919 | case RIPNG_UPDATE_EVENT: | |
b3d6bc6e MS |
1920 | thread_cancel(&ripng->t_update); |
1921 | ||
d62a17ae | 1922 | /* Update timer jitter. */ |
1923 | jitter = ripng_update_jitter(ripng->update_time); | |
1924 | ||
5c84b9a5 | 1925 | thread_add_timer(master, ripng_update, ripng, |
d62a17ae | 1926 | sock ? 2 : ripng->update_time + jitter, |
1927 | &ripng->t_update); | |
1928 | break; | |
1929 | case RIPNG_TRIGGERED_UPDATE: | |
1930 | if (ripng->t_triggered_interval) | |
1931 | ripng->trigger = 1; | |
1932 | else | |
5c84b9a5 | 1933 | thread_add_event(master, ripng_triggered_update, ripng, |
d62a17ae | 1934 | 0, &ripng->t_triggered_update); |
1935 | break; | |
1936 | default: | |
1937 | break; | |
1938 | } | |
718e3744 | 1939 | } |
6b0655a2 | 1940 | |
718e3744 | 1941 | |
718e3744 | 1942 | /* Print out routes update time. */ |
d62a17ae | 1943 | static void ripng_vty_out_uptime(struct vty *vty, struct ripng_info *rinfo) |
718e3744 | 1944 | { |
d62a17ae | 1945 | time_t clock; |
a2700b50 | 1946 | struct tm tm; |
718e3744 | 1947 | #define TIME_BUF 25 |
d62a17ae | 1948 | char timebuf[TIME_BUF]; |
1949 | struct thread *thread; | |
1950 | ||
1951 | if ((thread = rinfo->t_timeout) != NULL) { | |
1952 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
1953 | gmtime_r(&clock, &tm); |
1954 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 1955 | vty_out(vty, "%5s", timebuf); |
1956 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
1957 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
1958 | gmtime_r(&clock, &tm); |
1959 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 1960 | vty_out(vty, "%5s", timebuf); |
1961 | } | |
718e3744 | 1962 | } |
1963 | ||
d62a17ae | 1964 | static char *ripng_route_subtype_print(struct ripng_info *rinfo) |
1965 | { | |
1966 | static char str[3]; | |
1967 | memset(str, 0, 3); | |
1968 | ||
1969 | if (rinfo->suppress) | |
9736ba9e | 1970 | strlcat(str, "S", sizeof(str)); |
d62a17ae | 1971 | |
1972 | switch (rinfo->sub_type) { | |
1973 | case RIPNG_ROUTE_RTE: | |
9736ba9e | 1974 | strlcat(str, "n", sizeof(str)); |
d62a17ae | 1975 | break; |
1976 | case RIPNG_ROUTE_STATIC: | |
9736ba9e | 1977 | strlcat(str, "s", sizeof(str)); |
d62a17ae | 1978 | break; |
1979 | case RIPNG_ROUTE_DEFAULT: | |
9736ba9e | 1980 | strlcat(str, "d", sizeof(str)); |
d62a17ae | 1981 | break; |
1982 | case RIPNG_ROUTE_REDISTRIBUTE: | |
9736ba9e | 1983 | strlcat(str, "r", sizeof(str)); |
d62a17ae | 1984 | break; |
1985 | case RIPNG_ROUTE_INTERFACE: | |
9736ba9e | 1986 | strlcat(str, "i", sizeof(str)); |
d62a17ae | 1987 | break; |
1988 | default: | |
9736ba9e | 1989 | strlcat(str, "?", sizeof(str)); |
d62a17ae | 1990 | break; |
1991 | } | |
a94434b6 | 1992 | |
d62a17ae | 1993 | return str; |
a94434b6 | 1994 | } |
1995 | ||
718e3744 | 1996 | DEFUN (show_ipv6_ripng, |
1997 | show_ipv6_ripng_cmd, | |
dde7b15b | 1998 | "show ipv6 ripng [vrf NAME]", |
718e3744 | 1999 | SHOW_STR |
8d0f15fd | 2000 | IPV6_STR |
dde7b15b RW |
2001 | "Show RIPng routes\n" |
2002 | VRF_CMD_HELP_STR) | |
718e3744 | 2003 | { |
5c84b9a5 | 2004 | struct ripng *ripng; |
fe08ba7e | 2005 | struct agg_node *rp; |
d62a17ae | 2006 | struct ripng_info *rinfo; |
2007 | struct ripng_aggregate *aggregate; | |
d62a17ae | 2008 | struct list *list = NULL; |
2009 | struct listnode *listnode = NULL; | |
2010 | int len; | |
dde7b15b RW |
2011 | const char *vrf_name; |
2012 | int idx = 0; | |
d62a17ae | 2013 | |
dde7b15b RW |
2014 | if (argv_find(argv, argc, "vrf", &idx)) |
2015 | vrf_name = argv[idx + 1]->arg; | |
2016 | else | |
2017 | vrf_name = VRF_DEFAULT_NAME; | |
2018 | ||
2019 | ripng = ripng_lookup_by_vrf_name(vrf_name); | |
2020 | if (!ripng) { | |
2021 | vty_out(vty, "%% RIPng instance not found\n"); | |
2022 | return CMD_SUCCESS; | |
2023 | } | |
2024 | if (!ripng->enabled) { | |
2025 | vty_out(vty, "%% RIPng instance is disabled\n"); | |
d62a17ae | 2026 | return CMD_SUCCESS; |
dde7b15b | 2027 | } |
d62a17ae | 2028 | |
2029 | /* Header of display. */ | |
2030 | vty_out(vty, | |
2031 | "Codes: R - RIPng, C - connected, S - Static, O - OSPF, B - BGP\n" | |
2032 | "Sub-codes:\n" | |
2033 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
2034 | " (i) - interface, (a/S) - aggregated/Suppressed\n\n" | |
2035 | " Network Next Hop Via Metric Tag Time\n"); | |
2036 | ||
fe08ba7e | 2037 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { |
d62a17ae | 2038 | if ((aggregate = rp->aggregate) != NULL) { |
718e3744 | 2039 | #ifdef DEBUG |
26a3ffd6 DS |
2040 | vty_out(vty, "R(a) %d/%d %pRN ", aggregate->count, |
2041 | aggregate->suppress, rp); | |
718e3744 | 2042 | #else |
26a3ffd6 | 2043 | vty_out(vty, "R(a) %pRN ", rp); |
718e3744 | 2044 | #endif /* DEBUG */ |
d62a17ae | 2045 | vty_out(vty, "\n"); |
2046 | vty_out(vty, "%*s", 18, " "); | |
718e3744 | 2047 | |
d62a17ae | 2048 | vty_out(vty, "%*s", 28, " "); |
2049 | vty_out(vty, "self %2d %3" ROUTE_TAG_PRI "\n", | |
2050 | aggregate->metric, (route_tag_t)aggregate->tag); | |
2051 | } | |
718e3744 | 2052 | |
d62a17ae | 2053 | if ((list = rp->info) != NULL) |
2054 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
718e3744 | 2055 | #ifdef DEBUG |
26a3ffd6 | 2056 | vty_out(vty, "%c(%s) 0/%d %pRN ", |
d62a17ae | 2057 | zebra_route_char(rinfo->type), |
2058 | ripng_route_subtype_print(rinfo), | |
26a3ffd6 | 2059 | rinfo->suppress, rp); |
718e3744 | 2060 | #else |
26a3ffd6 | 2061 | vty_out(vty, "%c(%s) %pRN ", |
d62a17ae | 2062 | zebra_route_char(rinfo->type), |
26a3ffd6 | 2063 | ripng_route_subtype_print(rinfo), rp); |
718e3744 | 2064 | #endif /* DEBUG */ |
d62a17ae | 2065 | vty_out(vty, "\n"); |
2066 | vty_out(vty, "%*s", 18, " "); | |
2e5b3f37 MS |
2067 | len = vty_out(vty, "%pI6", |
2068 | &rinfo->nexthop); | |
d62a17ae | 2069 | |
2070 | len = 28 - len; | |
2071 | if (len > 0) | |
51f7fe84 | 2072 | vty_out(vty, "%*s", len, " "); |
d62a17ae | 2073 | |
2074 | /* from */ | |
2075 | if ((rinfo->type == ZEBRA_ROUTE_RIPNG) | |
2076 | && (rinfo->sub_type == RIPNG_ROUTE_RTE)) { | |
2077 | len = vty_out( | |
2078 | vty, "%s", | |
dde7b15b RW |
2079 | ifindex2ifname( |
2080 | rinfo->ifindex, | |
2081 | ripng->vrf->vrf_id)); | |
d62a17ae | 2082 | } else if (rinfo->metric |
2083 | == RIPNG_METRIC_INFINITY) { | |
2084 | len = vty_out(vty, "kill"); | |
2085 | } else | |
2086 | len = vty_out(vty, "self"); | |
2087 | ||
2088 | len = 9 - len; | |
2089 | if (len > 0) | |
2090 | vty_out(vty, "%*s", len, " "); | |
2091 | ||
2092 | vty_out(vty, " %2d %3" ROUTE_TAG_PRI " ", | |
2093 | rinfo->metric, (route_tag_t)rinfo->tag); | |
2094 | ||
2095 | /* time */ | |
2096 | if ((rinfo->type == ZEBRA_ROUTE_RIPNG) | |
2097 | && (rinfo->sub_type == RIPNG_ROUTE_RTE)) { | |
2098 | /* RTE from remote RIP routers */ | |
2099 | ripng_vty_out_uptime(vty, rinfo); | |
2100 | } else if (rinfo->metric | |
2101 | == RIPNG_METRIC_INFINITY) { | |
2102 | /* poisonous reversed routes (gc) */ | |
2103 | ripng_vty_out_uptime(vty, rinfo); | |
2104 | } | |
2105 | ||
2106 | vty_out(vty, "\n"); | |
2107 | } | |
718e3744 | 2108 | } |
718e3744 | 2109 | |
d62a17ae | 2110 | return CMD_SUCCESS; |
718e3744 | 2111 | } |
2112 | ||
a94434b6 | 2113 | DEFUN (show_ipv6_ripng_status, |
2114 | show_ipv6_ripng_status_cmd, | |
dde7b15b | 2115 | "show ipv6 ripng [vrf NAME] status", |
a94434b6 | 2116 | SHOW_STR |
8d0f15fd | 2117 | IPV6_STR |
a94434b6 | 2118 | "Show RIPng routes\n" |
dde7b15b | 2119 | VRF_CMD_HELP_STR |
a94434b6 | 2120 | "IPv6 routing protocol process parameters and statistics\n") |
2121 | { | |
5c84b9a5 | 2122 | struct ripng *ripng; |
d62a17ae | 2123 | struct interface *ifp; |
dde7b15b RW |
2124 | const char *vrf_name; |
2125 | int idx = 0; | |
a94434b6 | 2126 | |
dde7b15b RW |
2127 | if (argv_find(argv, argc, "vrf", &idx)) |
2128 | vrf_name = argv[idx + 1]->arg; | |
2129 | else | |
2130 | vrf_name = VRF_DEFAULT_NAME; | |
2131 | ||
2132 | ripng = ripng_lookup_by_vrf_name(vrf_name); | |
2133 | if (!ripng) { | |
2134 | vty_out(vty, "%% RIPng instance not found\n"); | |
2135 | return CMD_SUCCESS; | |
2136 | } | |
2137 | if (!ripng->enabled) { | |
2138 | vty_out(vty, "%% RIPng instance is disabled\n"); | |
d62a17ae | 2139 | return CMD_SUCCESS; |
dde7b15b | 2140 | } |
a94434b6 | 2141 | |
d62a17ae | 2142 | vty_out(vty, "Routing Protocol is \"RIPng\"\n"); |
f8981ec5 | 2143 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 2144 | ripng->update_time); |
2145 | vty_out(vty, " next due in %lu seconds\n", | |
2146 | thread_timer_remain_second(ripng->t_update)); | |
f8981ec5 RW |
2147 | vty_out(vty, " Timeout after %u seconds,", ripng->timeout_time); |
2148 | vty_out(vty, " garbage collect after %u seconds\n", | |
d62a17ae | 2149 | ripng->garbage_time); |
a94434b6 | 2150 | |
d62a17ae | 2151 | /* Filtering status show. */ |
03a38493 | 2152 | config_show_distribute(vty, ripng->distribute_ctx); |
a94434b6 | 2153 | |
d62a17ae | 2154 | /* Default metric information. */ |
2155 | vty_out(vty, " Default redistribution metric is %d\n", | |
2156 | ripng->default_metric); | |
a94434b6 | 2157 | |
d62a17ae | 2158 | /* Redistribute information. */ |
2159 | vty_out(vty, " Redistributing:"); | |
5c84b9a5 | 2160 | ripng_redistribute_write(vty, ripng); |
d62a17ae | 2161 | vty_out(vty, "\n"); |
a94434b6 | 2162 | |
d62a17ae | 2163 | vty_out(vty, " Default version control: send version %d,", |
2164 | ripng->version); | |
2165 | vty_out(vty, " receive version %d \n", ripng->version); | |
a94434b6 | 2166 | |
d62a17ae | 2167 | vty_out(vty, " Interface Send Recv\n"); |
a94434b6 | 2168 | |
dde7b15b | 2169 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 2170 | struct ripng_interface *ri; |
2171 | ||
2172 | ri = ifp->info; | |
a94434b6 | 2173 | |
d62a17ae | 2174 | if (ri->enable_network || ri->enable_interface) { |
a94434b6 | 2175 | |
d62a17ae | 2176 | vty_out(vty, " %-17s%-3d %-3d\n", ifp->name, |
2177 | ripng->version, ripng->version); | |
2178 | } | |
a94434b6 | 2179 | } |
a94434b6 | 2180 | |
d62a17ae | 2181 | vty_out(vty, " Routing for Networks:\n"); |
5c84b9a5 | 2182 | ripng_network_write(vty, ripng); |
a94434b6 | 2183 | |
d62a17ae | 2184 | vty_out(vty, " Routing Information Sources:\n"); |
2185 | vty_out(vty, | |
2186 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
5c84b9a5 | 2187 | ripng_peer_display(vty, ripng); |
a94434b6 | 2188 | |
d62a17ae | 2189 | return CMD_SUCCESS; |
a94434b6 | 2190 | } |
2191 | ||
fac76f9c | 2192 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
5c84b9a5 | 2193 | void ripng_ecmp_disable(struct ripng *ripng) |
d62a17ae | 2194 | { |
fe08ba7e | 2195 | struct agg_node *rp; |
d62a17ae | 2196 | struct ripng_info *rinfo, *tmp_rinfo; |
2197 | struct list *list; | |
2198 | struct listnode *node, *nextnode; | |
2199 | ||
2200 | if (!ripng) | |
2201 | return; | |
2202 | ||
fe08ba7e | 2203 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 2204 | if ((list = rp->info) != NULL && listcount(list) > 1) { |
2205 | rinfo = listgetdata(listhead(list)); | |
2206 | if (!ripng_route_rte(rinfo)) | |
2207 | continue; | |
2208 | ||
2209 | /* Drop all other entries, except the first one. */ | |
2210 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
2211 | if (tmp_rinfo != rinfo) { | |
2212 | RIPNG_TIMER_OFF(tmp_rinfo->t_timeout); | |
2213 | RIPNG_TIMER_OFF( | |
2214 | tmp_rinfo->t_garbage_collect); | |
2215 | list_delete_node(list, node); | |
2216 | ripng_info_free(tmp_rinfo); | |
2217 | } | |
2218 | ||
2219 | /* Update zebra. */ | |
5c84b9a5 | 2220 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 2221 | |
2222 | /* Set the route change flag. */ | |
2223 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
2224 | ||
2225 | /* Signal the output process to trigger an update. */ | |
5c84b9a5 | 2226 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 2227 | } |
fac76f9c FL |
2228 | } |
2229 | ||
718e3744 | 2230 | /* RIPng configuration write function. */ |
d62a17ae | 2231 | static int ripng_config_write(struct vty *vty) |
2232 | { | |
dde7b15b | 2233 | struct ripng *ripng; |
d62a17ae | 2234 | int write = 0; |
d62a17ae | 2235 | |
dde7b15b RW |
2236 | RB_FOREACH(ripng, ripng_instance_head, &ripng_instances) { |
2237 | char xpath[XPATH_MAXLEN]; | |
2238 | struct lyd_node *dnode; | |
2239 | ||
2240 | snprintf(xpath, sizeof(xpath), | |
2241 | "/frr-ripngd:ripngd/instance[vrf='%s']", | |
2242 | ripng->vrf_name); | |
2243 | ||
2244 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
2245 | assert(dnode); | |
d62a17ae | 2246 | |
5c84b9a5 | 2247 | nb_cli_show_dnode_cmds(vty, dnode, false); |
718e3744 | 2248 | |
dde7b15b | 2249 | config_write_distribute(vty, ripng->distribute_ctx); |
4b23867c | 2250 | config_write_if_rmap(vty, ripng->if_rmap_ctx); |
718e3744 | 2251 | |
07679ad9 IR |
2252 | vty_out(vty, "exit\n"); |
2253 | ||
9a12e9e5 | 2254 | write = 1; |
d62a17ae | 2255 | } |
9a12e9e5 | 2256 | |
d62a17ae | 2257 | return write; |
718e3744 | 2258 | } |
2259 | ||
612c2c15 | 2260 | static int ripng_config_write(struct vty *vty); |
718e3744 | 2261 | /* RIPng node structure. */ |
d62a17ae | 2262 | static struct cmd_node cmd_ripng_node = { |
f4b8291f | 2263 | .name = "ripng", |
62b346ee | 2264 | .node = RIPNG_NODE, |
24389580 | 2265 | .parent_node = CONFIG_NODE, |
62b346ee | 2266 | .prompt = "%s(config-router)# ", |
612c2c15 | 2267 | .config_write = ripng_config_write, |
718e3744 | 2268 | }; |
2269 | ||
03a38493 PG |
2270 | static void ripng_distribute_update(struct distribute_ctx *ctx, |
2271 | struct distribute *dist) | |
d62a17ae | 2272 | { |
2273 | struct interface *ifp; | |
2274 | struct ripng_interface *ri; | |
2275 | struct access_list *alist; | |
2276 | struct prefix_list *plist; | |
2277 | ||
dde7b15b | 2278 | if (!ctx->vrf || !dist->ifname) |
d62a17ae | 2279 | return; |
2280 | ||
a36898e7 | 2281 | ifp = if_lookup_by_name(dist->ifname, ctx->vrf->vrf_id); |
d62a17ae | 2282 | if (ifp == NULL) |
2283 | return; | |
2284 | ||
2285 | ri = ifp->info; | |
2286 | ||
2287 | if (dist->list[DISTRIBUTE_V6_IN]) { | |
2288 | alist = access_list_lookup(AFI_IP6, | |
2289 | dist->list[DISTRIBUTE_V6_IN]); | |
2290 | if (alist) | |
2291 | ri->list[RIPNG_FILTER_IN] = alist; | |
2292 | else | |
2293 | ri->list[RIPNG_FILTER_IN] = NULL; | |
2294 | } else | |
2295 | ri->list[RIPNG_FILTER_IN] = NULL; | |
2296 | ||
2297 | if (dist->list[DISTRIBUTE_V6_OUT]) { | |
2298 | alist = access_list_lookup(AFI_IP6, | |
2299 | dist->list[DISTRIBUTE_V6_OUT]); | |
2300 | if (alist) | |
2301 | ri->list[RIPNG_FILTER_OUT] = alist; | |
2302 | else | |
2303 | ri->list[RIPNG_FILTER_OUT] = NULL; | |
2304 | } else | |
2305 | ri->list[RIPNG_FILTER_OUT] = NULL; | |
2306 | ||
2307 | if (dist->prefix[DISTRIBUTE_V6_IN]) { | |
2308 | plist = prefix_list_lookup(AFI_IP6, | |
2309 | dist->prefix[DISTRIBUTE_V6_IN]); | |
2310 | if (plist) | |
2311 | ri->prefix[RIPNG_FILTER_IN] = plist; | |
2312 | else | |
2313 | ri->prefix[RIPNG_FILTER_IN] = NULL; | |
2314 | } else | |
2315 | ri->prefix[RIPNG_FILTER_IN] = NULL; | |
2316 | ||
2317 | if (dist->prefix[DISTRIBUTE_V6_OUT]) { | |
2318 | plist = prefix_list_lookup(AFI_IP6, | |
2319 | dist->prefix[DISTRIBUTE_V6_OUT]); | |
2320 | if (plist) | |
2321 | ri->prefix[RIPNG_FILTER_OUT] = plist; | |
2322 | else | |
2323 | ri->prefix[RIPNG_FILTER_OUT] = NULL; | |
2324 | } else | |
2325 | ri->prefix[RIPNG_FILTER_OUT] = NULL; | |
2326 | } | |
2327 | ||
2328 | void ripng_distribute_update_interface(struct interface *ifp) | |
2329 | { | |
dde7b15b RW |
2330 | struct ripng_interface *ri = ifp->info; |
2331 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 2332 | struct distribute *dist; |
2333 | ||
03a38493 PG |
2334 | if (!ripng) |
2335 | return; | |
2336 | dist = distribute_lookup(ripng->distribute_ctx, ifp->name); | |
d62a17ae | 2337 | if (dist) |
03a38493 | 2338 | ripng_distribute_update(ripng->distribute_ctx, dist); |
718e3744 | 2339 | } |
2340 | ||
2341 | /* Update all interface's distribute list. */ | |
d62a17ae | 2342 | static void ripng_distribute_update_all(struct prefix_list *notused) |
718e3744 | 2343 | { |
f4e14fdb | 2344 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 2345 | struct interface *ifp; |
718e3744 | 2346 | |
451fda4f | 2347 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 2348 | ripng_distribute_update_interface(ifp); |
718e3744 | 2349 | } |
c9e52be3 | 2350 | |
d62a17ae | 2351 | static void ripng_distribute_update_all_wrapper(struct access_list *notused) |
c9e52be3 | 2352 | { |
d62a17ae | 2353 | ripng_distribute_update_all(NULL); |
c9e52be3 | 2354 | } |
6b0655a2 | 2355 | |
a94434b6 | 2356 | /* delete all the added ripng routes. */ |
5c84b9a5 | 2357 | void ripng_clean(struct ripng *ripng) |
d62a17ae | 2358 | { |
eb6b3885 IR |
2359 | ripng_interface_clean(ripng); |
2360 | ||
dde7b15b RW |
2361 | if (ripng->enabled) |
2362 | ripng_instance_disable(ripng); | |
a9caf6e9 RW |
2363 | |
2364 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
f9120f71 RW |
2365 | if (ripng->redist[i].route_map.name) |
2366 | free(ripng->redist[i].route_map.name); | |
a94434b6 | 2367 | |
a9caf6e9 | 2368 | agg_table_finish(ripng->table); |
56bf1cb2 | 2369 | list_delete(&ripng->peer_list); |
a9caf6e9 | 2370 | distribute_list_delete(&ripng->distribute_ctx); |
8f88441d | 2371 | if_rmap_ctx_delete(ripng->if_rmap_ctx); |
0581e54d | 2372 | |
a9caf6e9 RW |
2373 | stream_free(ripng->ibuf); |
2374 | stream_free(ripng->obuf); | |
a94434b6 | 2375 | |
5c84b9a5 RW |
2376 | ripng_clean_network(ripng); |
2377 | ripng_passive_interface_clean(ripng); | |
b0ba762f | 2378 | vector_free(ripng->enable_if); |
29b94d58 | 2379 | agg_table_finish(ripng->enable_network); |
0c32404f | 2380 | vector_free(ripng->passive_interface); |
26c6be93 | 2381 | list_delete(&ripng->offset_list_master); |
5c84b9a5 | 2382 | |
dde7b15b RW |
2383 | RB_REMOVE(ripng_instance_head, &ripng_instances, ripng); |
2384 | XFREE(MTYPE_RIPNG_VRF_NAME, ripng->vrf_name); | |
a9caf6e9 | 2385 | XFREE(MTYPE_RIPNG, ripng); |
a94434b6 | 2386 | } |
2387 | ||
4b23867c PG |
2388 | static void ripng_if_rmap_update(struct if_rmap_ctx *ctx, |
2389 | struct if_rmap *if_rmap) | |
718e3744 | 2390 | { |
aec0d756 | 2391 | struct interface *ifp = NULL; |
d62a17ae | 2392 | struct ripng_interface *ri; |
2393 | struct route_map *rmap; | |
aec0d756 | 2394 | struct vrf *vrf = NULL; |
718e3744 | 2395 | |
aec0d756 PG |
2396 | if (ctx->name) |
2397 | vrf = vrf_lookup_by_name(ctx->name); | |
2398 | if (vrf) | |
a36898e7 | 2399 | ifp = if_lookup_by_name(if_rmap->ifname, vrf->vrf_id); |
d62a17ae | 2400 | if (ifp == NULL) |
2401 | return; | |
718e3744 | 2402 | |
d62a17ae | 2403 | ri = ifp->info; |
718e3744 | 2404 | |
d62a17ae | 2405 | if (if_rmap->routemap[IF_RMAP_IN]) { |
2406 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
2407 | if (rmap) | |
2408 | ri->routemap[IF_RMAP_IN] = rmap; | |
2409 | else | |
2410 | ri->routemap[IF_RMAP_IN] = NULL; | |
2411 | } else | |
2412 | ri->routemap[RIPNG_FILTER_IN] = NULL; | |
718e3744 | 2413 | |
d62a17ae | 2414 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
2415 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
2416 | if (rmap) | |
2417 | ri->routemap[IF_RMAP_OUT] = rmap; | |
2418 | else | |
2419 | ri->routemap[IF_RMAP_OUT] = NULL; | |
2420 | } else | |
2421 | ri->routemap[RIPNG_FILTER_OUT] = NULL; | |
718e3744 | 2422 | } |
2423 | ||
d62a17ae | 2424 | void ripng_if_rmap_update_interface(struct interface *ifp) |
718e3744 | 2425 | { |
8f88441d RW |
2426 | struct ripng_interface *ri = ifp->info; |
2427 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 2428 | struct if_rmap *if_rmap; |
4b23867c | 2429 | struct if_rmap_ctx *ctx; |
718e3744 | 2430 | |
4b23867c PG |
2431 | if (!ripng) |
2432 | return; | |
2433 | ctx = ripng->if_rmap_ctx; | |
2434 | if (!ctx) | |
2435 | return; | |
2436 | if_rmap = if_rmap_lookup(ctx, ifp->name); | |
d62a17ae | 2437 | if (if_rmap) |
4b23867c | 2438 | ripng_if_rmap_update(ctx, if_rmap); |
718e3744 | 2439 | } |
2440 | ||
5c84b9a5 | 2441 | static void ripng_routemap_update_redistribute(struct ripng *ripng) |
718e3744 | 2442 | { |
5c84b9a5 | 2443 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
8f88441d | 2444 | if (ripng->redist[i].route_map.name) { |
f9120f71 RW |
2445 | ripng->redist[i].route_map.map = |
2446 | route_map_lookup_by_name( | |
2447 | ripng->redist[i].route_map.name); | |
8f88441d RW |
2448 | route_map_counter_increment( |
2449 | ripng->redist[i].route_map.map); | |
d62a17ae | 2450 | } |
718e3744 | 2451 | } |
718e3744 | 2452 | } |
2453 | ||
d62a17ae | 2454 | static void ripng_routemap_update(const char *unused) |
718e3744 | 2455 | { |
f4e14fdb | 2456 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
5c84b9a5 | 2457 | struct ripng *ripng; |
d62a17ae | 2458 | struct interface *ifp; |
718e3744 | 2459 | |
451fda4f | 2460 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 2461 | ripng_if_rmap_update_interface(ifp); |
718e3744 | 2462 | |
5c84b9a5 RW |
2463 | ripng = vrf->info; |
2464 | if (ripng) | |
2465 | ripng_routemap_update_redistribute(ripng); | |
718e3744 | 2466 | } |
2467 | ||
dde7b15b RW |
2468 | /* Link RIPng instance to VRF. */ |
2469 | static void ripng_vrf_link(struct ripng *ripng, struct vrf *vrf) | |
2470 | { | |
2471 | struct interface *ifp; | |
2472 | ||
2473 | ripng->vrf = vrf; | |
2474 | ripng->distribute_ctx->vrf = vrf; | |
2475 | vrf->info = ripng; | |
2476 | ||
2477 | FOR_ALL_INTERFACES (vrf, ifp) | |
2478 | ripng_interface_sync(ifp); | |
2479 | } | |
2480 | ||
2481 | /* Unlink RIPng instance from VRF. */ | |
2482 | static void ripng_vrf_unlink(struct ripng *ripng, struct vrf *vrf) | |
2483 | { | |
2484 | struct interface *ifp; | |
2485 | ||
2486 | ripng->vrf = NULL; | |
2487 | ripng->distribute_ctx->vrf = NULL; | |
2488 | vrf->info = NULL; | |
2489 | ||
2490 | FOR_ALL_INTERFACES (vrf, ifp) | |
2491 | ripng_interface_sync(ifp); | |
2492 | } | |
2493 | ||
2494 | static void ripng_instance_enable(struct ripng *ripng, struct vrf *vrf, | |
2495 | int sock) | |
2496 | { | |
2497 | ripng->sock = sock; | |
2498 | ||
2499 | ripng_vrf_link(ripng, vrf); | |
2500 | ripng->enabled = true; | |
2501 | ||
f9120f71 RW |
2502 | /* Resend all redistribute requests. */ |
2503 | ripng_redistribute_enable(ripng); | |
2504 | ||
dde7b15b RW |
2505 | /* Create read and timer thread. */ |
2506 | ripng_event(ripng, RIPNG_READ, ripng->sock); | |
2507 | ripng_event(ripng, RIPNG_UPDATE_EVENT, 1); | |
2508 | ||
2509 | ripng_zebra_vrf_register(vrf); | |
2510 | } | |
2511 | ||
2512 | static void ripng_instance_disable(struct ripng *ripng) | |
2513 | { | |
2514 | struct vrf *vrf = ripng->vrf; | |
2515 | struct agg_node *rp; | |
2516 | ||
2517 | /* Clear RIPng routes */ | |
2518 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { | |
2519 | struct ripng_aggregate *aggregate; | |
2520 | struct list *list; | |
2521 | ||
2522 | if ((list = rp->info) != NULL) { | |
2523 | struct ripng_info *rinfo; | |
2524 | struct listnode *listnode; | |
2525 | ||
2526 | rinfo = listgetdata(listhead(list)); | |
2527 | if (ripng_route_rte(rinfo)) | |
2528 | ripng_zebra_ipv6_delete(ripng, rp); | |
2529 | ||
2530 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
2531 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
2532 | RIPNG_TIMER_OFF(rinfo->t_garbage_collect); | |
2533 | ripng_info_free(rinfo); | |
2534 | } | |
2535 | list_delete(&list); | |
2536 | rp->info = NULL; | |
2537 | agg_unlock_node(rp); | |
2538 | } | |
2539 | ||
2540 | if ((aggregate = rp->aggregate) != NULL) { | |
2541 | ripng_aggregate_free(aggregate); | |
2542 | rp->aggregate = NULL; | |
2543 | agg_unlock_node(rp); | |
2544 | } | |
2545 | } | |
2546 | ||
f9120f71 RW |
2547 | /* Flush all redistribute requests. */ |
2548 | ripng_redistribute_disable(ripng); | |
2549 | ||
dde7b15b RW |
2550 | /* Cancel the RIPng timers */ |
2551 | RIPNG_TIMER_OFF(ripng->t_update); | |
2552 | RIPNG_TIMER_OFF(ripng->t_triggered_update); | |
2553 | RIPNG_TIMER_OFF(ripng->t_triggered_interval); | |
2554 | ||
2555 | /* Cancel the read thread */ | |
b3d6bc6e | 2556 | thread_cancel(&ripng->t_read); |
dde7b15b RW |
2557 | |
2558 | /* Close the RIPng socket */ | |
2559 | if (ripng->sock >= 0) { | |
2560 | close(ripng->sock); | |
2561 | ripng->sock = -1; | |
2562 | } | |
2563 | ||
2564 | /* Clear existing peers. */ | |
2565 | list_delete_all_node(ripng->peer_list); | |
2566 | ||
2567 | ripng_zebra_vrf_deregister(vrf); | |
2568 | ||
2569 | ripng_vrf_unlink(ripng, vrf); | |
2570 | ripng->enabled = false; | |
2571 | } | |
2572 | ||
2573 | static int ripng_vrf_new(struct vrf *vrf) | |
2574 | { | |
2575 | if (IS_RIPNG_DEBUG_EVENT) | |
2576 | zlog_debug("%s: VRF created: %s(%u)", __func__, vrf->name, | |
2577 | vrf->vrf_id); | |
2578 | ||
2579 | return 0; | |
2580 | } | |
2581 | ||
2582 | static int ripng_vrf_delete(struct vrf *vrf) | |
2583 | { | |
2584 | if (IS_RIPNG_DEBUG_EVENT) | |
2585 | zlog_debug("%s: VRF deleted: %s(%u)", __func__, vrf->name, | |
2586 | vrf->vrf_id); | |
2587 | ||
2588 | return 0; | |
2589 | } | |
2590 | ||
2591 | static int ripng_vrf_enable(struct vrf *vrf) | |
2592 | { | |
2593 | struct ripng *ripng; | |
2594 | int socket; | |
2595 | ||
2596 | ripng = ripng_lookup_by_vrf_name(vrf->name); | |
ac2cb9bf | 2597 | if (!ripng || ripng->enabled) |
dde7b15b RW |
2598 | return 0; |
2599 | ||
2600 | if (IS_RIPNG_DEBUG_EVENT) | |
2601 | zlog_debug("%s: VRF %s(%u) enabled", __func__, vrf->name, | |
2602 | vrf->vrf_id); | |
2603 | ||
2604 | /* Activate the VRF RIPng instance. */ | |
be2bad2e PG |
2605 | socket = ripng_make_socket(vrf); |
2606 | if (socket < 0) | |
2607 | return -1; | |
dde7b15b | 2608 | |
be2bad2e | 2609 | ripng_instance_enable(ripng, vrf, socket); |
dde7b15b RW |
2610 | |
2611 | return 0; | |
2612 | } | |
2613 | ||
2614 | static int ripng_vrf_disable(struct vrf *vrf) | |
2615 | { | |
2616 | struct ripng *ripng; | |
2617 | ||
2618 | ripng = ripng_lookup_by_vrf_name(vrf->name); | |
2619 | if (!ripng || !ripng->enabled) | |
2620 | return 0; | |
2621 | ||
2622 | if (IS_RIPNG_DEBUG_EVENT) | |
2623 | zlog_debug("%s: VRF %s(%u) disabled", __func__, vrf->name, | |
2624 | vrf->vrf_id); | |
2625 | ||
2626 | /* Deactivate the VRF RIPng instance. */ | |
2627 | if (ripng->enabled) | |
2628 | ripng_instance_disable(ripng); | |
2629 | ||
2630 | return 0; | |
2631 | } | |
2632 | ||
2633 | void ripng_vrf_init(void) | |
2634 | { | |
2635 | vrf_init(ripng_vrf_new, ripng_vrf_enable, ripng_vrf_disable, | |
ac2cb9bf | 2636 | ripng_vrf_delete); |
f5eef2d5 | 2637 | |
cfc369c4 | 2638 | vrf_cmd_init(NULL); |
dde7b15b RW |
2639 | } |
2640 | ||
2641 | void ripng_vrf_terminate(void) | |
2642 | { | |
2643 | vrf_terminate(); | |
2644 | } | |
2645 | ||
718e3744 | 2646 | /* Initialize ripng structure and set commands. */ |
4d762f26 | 2647 | void ripng_init(void) |
718e3744 | 2648 | { |
d62a17ae | 2649 | /* Install RIPNG_NODE. */ |
612c2c15 | 2650 | install_node(&cmd_ripng_node); |
718e3744 | 2651 | |
d62a17ae | 2652 | /* Install ripng commands. */ |
2653 | install_element(VIEW_NODE, &show_ipv6_ripng_cmd); | |
2654 | install_element(VIEW_NODE, &show_ipv6_ripng_status_cmd); | |
718e3744 | 2655 | |
d62a17ae | 2656 | install_default(RIPNG_NODE); |
718e3744 | 2657 | |
d62a17ae | 2658 | ripng_if_init(); |
2659 | ripng_debug_init(); | |
718e3744 | 2660 | |
d62a17ae | 2661 | /* Access list install. */ |
2662 | access_list_init(); | |
2663 | access_list_add_hook(ripng_distribute_update_all_wrapper); | |
2664 | access_list_delete_hook(ripng_distribute_update_all_wrapper); | |
718e3744 | 2665 | |
d62a17ae | 2666 | /* Prefix list initialize.*/ |
2667 | prefix_list_init(); | |
2668 | prefix_list_add_hook(ripng_distribute_update_all); | |
2669 | prefix_list_delete_hook(ripng_distribute_update_all); | |
718e3744 | 2670 | |
d62a17ae | 2671 | /* Route-map for interface. */ |
2672 | ripng_route_map_init(); | |
a94434b6 | 2673 | |
d62a17ae | 2674 | route_map_add_hook(ripng_routemap_update); |
2675 | route_map_delete_hook(ripng_routemap_update); | |
718e3744 | 2676 | |
d62a17ae | 2677 | if_rmap_init(RIPNG_NODE); |
718e3744 | 2678 | } |