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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
718e3744 | 2 | /* RIPng daemon |
3 | * Copyright (C) 1998, 1999 Kunihiro Ishiguro | |
718e3744 | 4 | */ |
5 | ||
6 | #include <zebra.h> | |
7 | ||
718e3744 | 8 | #include "prefix.h" |
9 | #include "filter.h" | |
10 | #include "log.h" | |
11 | #include "thread.h" | |
12 | #include "memory.h" | |
13 | #include "if.h" | |
14 | #include "stream.h" | |
fe08ba7e | 15 | #include "agg_table.h" |
718e3744 | 16 | #include "command.h" |
17 | #include "sockopt.h" | |
18 | #include "distribute.h" | |
19 | #include "plist.h" | |
20 | #include "routemap.h" | |
0750d21f | 21 | #include "if_rmap.h" |
27d47aa7 | 22 | #include "privs.h" |
7f9a4fd7 | 23 | #include "lib_errors.h" |
9a12e9e5 | 24 | #include "northbound_cli.h" |
5920b3eb | 25 | #include "network.h" |
718e3744 | 26 | |
27 | #include "ripngd/ripngd.h" | |
28 | #include "ripngd/ripng_route.h" | |
29 | #include "ripngd/ripng_debug.h" | |
a94434b6 | 30 | #include "ripngd/ripng_nexthop.h" |
718e3744 | 31 | |
bf8d3d6a DL |
32 | DEFINE_MGROUP(RIPNGD, "ripngd"); |
33 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG, "RIPng structure"); | |
34 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_VRF_NAME, "RIPng VRF name"); | |
35 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_ROUTE, "RIPng route info"); | |
b3a7e30d | 36 | |
d62a17ae | 37 | enum { ripng_all_route, |
38 | ripng_changed_route, | |
718e3744 | 39 | }; |
40 | ||
03a38493 PG |
41 | static void ripng_distribute_update(struct distribute_ctx *ctx, |
42 | struct distribute *dist); | |
43 | ||
718e3744 | 44 | /* Prototypes. */ |
d62a17ae | 45 | void ripng_output_process(struct interface *, struct sockaddr_in6 *, int); |
dde7b15b RW |
46 | static void ripng_instance_enable(struct ripng *ripng, struct vrf *vrf, |
47 | int sock); | |
48 | static void ripng_instance_disable(struct ripng *ripng); | |
cc9f21da | 49 | static void ripng_triggered_update(struct thread *); |
4b23867c PG |
50 | static void ripng_if_rmap_update(struct if_rmap_ctx *ctx, |
51 | struct if_rmap *if_rmap); | |
718e3744 | 52 | |
dde7b15b RW |
53 | /* Generate rb-tree of RIPng instances. */ |
54 | static inline int ripng_instance_compare(const struct ripng *a, | |
55 | const struct ripng *b) | |
56 | { | |
57 | return strcmp(a->vrf_name, b->vrf_name); | |
58 | } | |
59 | RB_GENERATE(ripng_instance_head, ripng, entry, ripng_instance_compare) | |
60 | ||
61 | struct ripng_instance_head ripng_instances = RB_INITIALIZER(&ripng_instances); | |
62 | ||
718e3744 | 63 | /* RIPng next hop specification. */ |
d62a17ae | 64 | struct ripng_nexthop { |
65 | enum ripng_nexthop_type { | |
66 | RIPNG_NEXTHOP_UNSPEC, | |
67 | RIPNG_NEXTHOP_ADDRESS | |
68 | } flag; | |
69 | struct in6_addr address; | |
718e3744 | 70 | }; |
718e3744 | 71 | |
49e06d25 | 72 | int ripng_route_rte(struct ripng_info *rinfo) |
a94434b6 | 73 | { |
d62a17ae | 74 | return (rinfo->type == ZEBRA_ROUTE_RIPNG |
75 | && rinfo->sub_type == RIPNG_ROUTE_RTE); | |
a94434b6 | 76 | } |
77 | ||
718e3744 | 78 | /* Allocate new ripng information. */ |
4d762f26 | 79 | struct ripng_info *ripng_info_new(void) |
718e3744 | 80 | { |
d62a17ae | 81 | struct ripng_info *new; |
718e3744 | 82 | |
d62a17ae | 83 | new = XCALLOC(MTYPE_RIPNG_ROUTE, sizeof(struct ripng_info)); |
84 | return new; | |
718e3744 | 85 | } |
86 | ||
87 | /* Free ripng information. */ | |
d62a17ae | 88 | void ripng_info_free(struct ripng_info *rinfo) |
718e3744 | 89 | { |
d62a17ae | 90 | XFREE(MTYPE_RIPNG_ROUTE, rinfo); |
718e3744 | 91 | } |
6b0655a2 | 92 | |
5c84b9a5 RW |
93 | struct ripng *ripng_info_get_instance(const struct ripng_info *rinfo) |
94 | { | |
95 | return agg_get_table_info(agg_get_table(rinfo->rp)); | |
96 | } | |
97 | ||
718e3744 | 98 | /* Create ripng socket. */ |
dde7b15b | 99 | int ripng_make_socket(struct vrf *vrf) |
718e3744 | 100 | { |
d62a17ae | 101 | int ret; |
102 | int sock; | |
103 | struct sockaddr_in6 ripaddr; | |
dde7b15b RW |
104 | const char *vrf_dev = NULL; |
105 | ||
106 | /* Make datagram socket. */ | |
107 | if (vrf->vrf_id != VRF_DEFAULT) | |
108 | vrf_dev = vrf->name; | |
0cf6db21 | 109 | frr_with_privs(&ripngd_privs) { |
dde7b15b RW |
110 | sock = vrf_socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, |
111 | vrf->vrf_id, vrf_dev); | |
112 | if (sock < 0) { | |
113 | flog_err_sys(EC_LIB_SOCKET, | |
114 | "Cannot create UDP socket: %s", | |
115 | safe_strerror(errno)); | |
116 | return -1; | |
117 | } | |
d62a17ae | 118 | } |
718e3744 | 119 | |
dde7b15b RW |
120 | sockopt_reuseaddr(sock); |
121 | sockopt_reuseport(sock); | |
d62a17ae | 122 | setsockopt_so_recvbuf(sock, 8096); |
123 | ret = setsockopt_ipv6_pktinfo(sock, 1); | |
124 | if (ret < 0) | |
44f12f20 | 125 | goto error; |
6d0732c8 | 126 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 127 | ret = setsockopt_ipv6_tclass(sock, IPTOS_PREC_INTERNETCONTROL); |
128 | if (ret < 0) | |
44f12f20 | 129 | goto error; |
6d0732c8 | 130 | #endif |
d62a17ae | 131 | ret = setsockopt_ipv6_multicast_hops(sock, 255); |
132 | if (ret < 0) | |
44f12f20 | 133 | goto error; |
d62a17ae | 134 | ret = setsockopt_ipv6_multicast_loop(sock, 0); |
135 | if (ret < 0) | |
44f12f20 | 136 | goto error; |
d62a17ae | 137 | ret = setsockopt_ipv6_hoplimit(sock, 1); |
138 | if (ret < 0) | |
44f12f20 | 139 | goto error; |
d62a17ae | 140 | |
141 | memset(&ripaddr, 0, sizeof(ripaddr)); | |
142 | ripaddr.sin6_family = AF_INET6; | |
718e3744 | 143 | #ifdef SIN6_LEN |
d62a17ae | 144 | ripaddr.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 145 | #endif /* SIN6_LEN */ |
d62a17ae | 146 | ripaddr.sin6_port = htons(RIPNG_PORT_DEFAULT); |
718e3744 | 147 | |
0cf6db21 | 148 | frr_with_privs(&ripngd_privs) { |
01b9e3fd DL |
149 | ret = bind(sock, (struct sockaddr *)&ripaddr, sizeof(ripaddr)); |
150 | if (ret < 0) { | |
633fc9b1 DL |
151 | zlog_err("Can't bind ripng socket: %s.", |
152 | safe_strerror(errno)); | |
01b9e3fd DL |
153 | goto error; |
154 | } | |
d62a17ae | 155 | } |
d62a17ae | 156 | return sock; |
44f12f20 RW |
157 | |
158 | error: | |
159 | close(sock); | |
160 | return ret; | |
718e3744 | 161 | } |
162 | ||
163 | /* Send RIPng packet. */ | |
d62a17ae | 164 | int ripng_send_packet(caddr_t buf, int bufsize, struct sockaddr_in6 *to, |
165 | struct interface *ifp) | |
166 | { | |
5c84b9a5 RW |
167 | struct ripng_interface *ri = ifp->info; |
168 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 169 | int ret; |
170 | struct msghdr msg; | |
171 | struct iovec iov; | |
172 | struct cmsghdr *cmsgptr; | |
2ae9e38f | 173 | char adata[256] = {}; |
d62a17ae | 174 | struct in6_pktinfo *pkt; |
175 | struct sockaddr_in6 addr; | |
176 | ||
177 | if (IS_RIPNG_DEBUG_SEND) { | |
178 | if (to) | |
2e5b3f37 | 179 | zlog_debug("send to %pI6", &to->sin6_addr); |
d62a17ae | 180 | zlog_debug(" send interface %s", ifp->name); |
181 | zlog_debug(" send packet size %d", bufsize); | |
182 | } | |
183 | ||
6006b807 | 184 | memset(&addr, 0, sizeof(addr)); |
d62a17ae | 185 | addr.sin6_family = AF_INET6; |
718e3744 | 186 | #ifdef SIN6_LEN |
d62a17ae | 187 | addr.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 188 | #endif /* SIN6_LEN */ |
d62a17ae | 189 | addr.sin6_flowinfo = htonl(RIPNG_PRIORITY_DEFAULT); |
190 | ||
191 | /* When destination is specified. */ | |
192 | if (to != NULL) { | |
193 | addr.sin6_addr = to->sin6_addr; | |
194 | addr.sin6_port = to->sin6_port; | |
195 | } else { | |
196 | inet_pton(AF_INET6, RIPNG_GROUP, &addr.sin6_addr); | |
197 | addr.sin6_port = htons(RIPNG_PORT_DEFAULT); | |
198 | } | |
718e3744 | 199 | |
0af35d90 | 200 | memset(&msg, 0, sizeof(msg)); |
d62a17ae | 201 | msg.msg_name = (void *)&addr; |
202 | msg.msg_namelen = sizeof(struct sockaddr_in6); | |
203 | msg.msg_iov = &iov; | |
204 | msg.msg_iovlen = 1; | |
8998807f | 205 | msg.msg_control = adata; |
d62a17ae | 206 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); |
207 | ||
208 | iov.iov_base = buf; | |
209 | iov.iov_len = bufsize; | |
210 | ||
211 | cmsgptr = (struct cmsghdr *)adata; | |
212 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); | |
213 | cmsgptr->cmsg_level = IPPROTO_IPV6; | |
214 | cmsgptr->cmsg_type = IPV6_PKTINFO; | |
215 | ||
216 | pkt = (struct in6_pktinfo *)CMSG_DATA(cmsgptr); | |
217 | memset(&pkt->ipi6_addr, 0, sizeof(struct in6_addr)); | |
218 | pkt->ipi6_ifindex = ifp->ifindex; | |
219 | ||
220 | ret = sendmsg(ripng->sock, &msg, 0); | |
221 | ||
222 | if (ret < 0) { | |
223 | if (to) | |
450971aa | 224 | flog_err_sys(EC_LIB_SOCKET, |
2e5b3f37 MS |
225 | "RIPng send fail on %s to %pI6: %s", |
226 | ifp->name, &to->sin6_addr, | |
09c866e3 | 227 | safe_strerror(errno)); |
d62a17ae | 228 | else |
1c50c1c0 QY |
229 | flog_err_sys(EC_LIB_SOCKET, "RIPng send fail on %s: %s", |
230 | ifp->name, safe_strerror(errno)); | |
d62a17ae | 231 | } |
718e3744 | 232 | |
d62a17ae | 233 | return ret; |
718e3744 | 234 | } |
235 | ||
236 | /* Receive UDP RIPng packet from socket. */ | |
d7c0a89a | 237 | static int ripng_recv_packet(int sock, uint8_t *buf, int bufsize, |
d62a17ae | 238 | struct sockaddr_in6 *from, ifindex_t *ifindex, |
239 | int *hoplimit) | |
240 | { | |
241 | int ret; | |
242 | struct msghdr msg; | |
243 | struct iovec iov; | |
244 | struct cmsghdr *cmsgptr; | |
245 | struct in6_addr dst = {.s6_addr = {0}}; | |
246 | ||
6006b807 | 247 | memset(&dst, 0, sizeof(dst)); |
d62a17ae | 248 | |
249 | /* Ancillary data. This store cmsghdr and in6_pktinfo. But at this | |
250 | point I can't determine size of cmsghdr */ | |
251 | char adata[1024]; | |
252 | ||
253 | /* Fill in message and iovec. */ | |
0af35d90 | 254 | memset(&msg, 0, sizeof(msg)); |
d62a17ae | 255 | msg.msg_name = (void *)from; |
256 | msg.msg_namelen = sizeof(struct sockaddr_in6); | |
257 | msg.msg_iov = &iov; | |
258 | msg.msg_iovlen = 1; | |
259 | msg.msg_control = (void *)adata; | |
0d6f7fd6 | 260 | msg.msg_controllen = sizeof(adata); |
d62a17ae | 261 | iov.iov_base = buf; |
262 | iov.iov_len = bufsize; | |
263 | ||
264 | /* If recvmsg fail return minus value. */ | |
265 | ret = recvmsg(sock, &msg, 0); | |
266 | if (ret < 0) | |
267 | return ret; | |
268 | ||
adf0e7c6 | 269 | for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL; |
d62a17ae | 270 | cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) { |
271 | /* I want interface index which this packet comes from. */ | |
272 | if (cmsgptr->cmsg_level == IPPROTO_IPV6 | |
273 | && cmsgptr->cmsg_type == IPV6_PKTINFO) { | |
274 | struct in6_pktinfo *ptr; | |
275 | ||
276 | ptr = (struct in6_pktinfo *)CMSG_DATA(cmsgptr); | |
277 | *ifindex = ptr->ipi6_ifindex; | |
278 | dst = ptr->ipi6_addr; | |
279 | ||
280 | if (*ifindex == 0) | |
281 | zlog_warn( | |
282 | "Interface index returned by IPV6_PKTINFO is zero"); | |
283 | } | |
284 | ||
285 | /* Incoming packet's multicast hop limit. */ | |
286 | if (cmsgptr->cmsg_level == IPPROTO_IPV6 | |
287 | && cmsgptr->cmsg_type == IPV6_HOPLIMIT) { | |
288 | int *phoplimit = (int *)CMSG_DATA(cmsgptr); | |
289 | *hoplimit = *phoplimit; | |
290 | } | |
5eb9d11b | 291 | } |
718e3744 | 292 | |
d62a17ae | 293 | /* Hoplimit check shold be done when destination address is |
294 | multicast address. */ | |
295 | if (!IN6_IS_ADDR_MULTICAST(&dst)) | |
296 | *hoplimit = -1; | |
718e3744 | 297 | |
d62a17ae | 298 | return ret; |
718e3744 | 299 | } |
300 | ||
301 | /* Dump rip packet */ | |
d62a17ae | 302 | void ripng_packet_dump(struct ripng_packet *packet, int size, |
303 | const char *sndrcv) | |
304 | { | |
305 | caddr_t lim; | |
306 | struct rte *rte; | |
307 | const char *command_str; | |
308 | ||
309 | /* Set command string. */ | |
310 | if (packet->command == RIPNG_REQUEST) | |
311 | command_str = "request"; | |
312 | else if (packet->command == RIPNG_RESPONSE) | |
313 | command_str = "response"; | |
314 | else | |
315 | command_str = "unknown"; | |
316 | ||
317 | /* Dump packet header. */ | |
318 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
319 | packet->version, size); | |
320 | ||
321 | /* Dump each routing table entry. */ | |
322 | rte = packet->rte; | |
323 | ||
324 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
325 | if (rte->metric == RIPNG_METRIC_NEXTHOP) | |
2e5b3f37 | 326 | zlog_debug(" nexthop %pI6/%d", &rte->addr, |
d62a17ae | 327 | rte->prefixlen); |
328 | else | |
2e5b3f37 MS |
329 | zlog_debug(" %pI6/%d metric %d tag %" ROUTE_TAG_PRI, |
330 | &rte->addr, rte->prefixlen, | |
d62a17ae | 331 | rte->metric, (route_tag_t)ntohs(rte->tag)); |
332 | } | |
718e3744 | 333 | } |
334 | ||
335 | /* RIPng next hop address RTE (Route Table Entry). */ | |
d62a17ae | 336 | static void ripng_nexthop_rte(struct rte *rte, struct sockaddr_in6 *from, |
337 | struct ripng_nexthop *nexthop) | |
338 | { | |
d62a17ae | 339 | /* Logging before checking RTE. */ |
340 | if (IS_RIPNG_DEBUG_RECV) | |
2e5b3f37 | 341 | zlog_debug("RIPng nexthop RTE address %pI6 tag %" ROUTE_TAG_PRI |
d62a17ae | 342 | " prefixlen %d", |
2e5b3f37 | 343 | &rte->addr, (route_tag_t)ntohs(rte->tag), |
d62a17ae | 344 | rte->prefixlen); |
345 | ||
346 | /* RFC2080 2.1.1 Next Hop: | |
347 | The route tag and prefix length in the next hop RTE must be | |
348 | set to zero on sending and ignored on receiption. */ | |
349 | if (ntohs(rte->tag) != 0) | |
350 | zlog_warn( | |
351 | "RIPng nexthop RTE with non zero tag value %" ROUTE_TAG_PRI | |
2e5b3f37 MS |
352 | " from %pI6", |
353 | (route_tag_t)ntohs(rte->tag), &from->sin6_addr); | |
d62a17ae | 354 | |
355 | if (rte->prefixlen != 0) | |
356 | zlog_warn( | |
2e5b3f37 MS |
357 | "RIPng nexthop RTE with non zero prefixlen value %d from %pI6", |
358 | rte->prefixlen, &from->sin6_addr); | |
d62a17ae | 359 | |
360 | /* Specifying a value of 0:0:0:0:0:0:0:0 in the prefix field of a | |
361 | next hop RTE indicates that the next hop address should be the | |
362 | originator of the RIPng advertisement. An address specified as a | |
363 | next hop must be a link-local address. */ | |
364 | if (IN6_IS_ADDR_UNSPECIFIED(&rte->addr)) { | |
365 | nexthop->flag = RIPNG_NEXTHOP_UNSPEC; | |
366 | memset(&nexthop->address, 0, sizeof(struct in6_addr)); | |
367 | return; | |
368 | } | |
718e3744 | 369 | |
d62a17ae | 370 | if (IN6_IS_ADDR_LINKLOCAL(&rte->addr)) { |
371 | nexthop->flag = RIPNG_NEXTHOP_ADDRESS; | |
372 | IPV6_ADDR_COPY(&nexthop->address, &rte->addr); | |
373 | return; | |
374 | } | |
718e3744 | 375 | |
d62a17ae | 376 | /* The purpose of the next hop RTE is to eliminate packets being |
377 | routed through extra hops in the system. It is particularly useful | |
378 | when RIPng is not being run on all of the routers on a network. | |
379 | Note that next hop RTE is "advisory". That is, if the provided | |
380 | information is ignored, a possibly sub-optimal, but absolutely | |
381 | valid, route may be taken. If the received next hop address is not | |
382 | a link-local address, it should be treated as 0:0:0:0:0:0:0:0. */ | |
2e5b3f37 MS |
383 | zlog_warn("RIPng nexthop RTE with non link-local address %pI6 from %pI6", |
384 | &rte->addr, &from->sin6_addr); | |
718e3744 | 385 | |
d62a17ae | 386 | nexthop->flag = RIPNG_NEXTHOP_UNSPEC; |
387 | memset(&nexthop->address, 0, sizeof(struct in6_addr)); | |
718e3744 | 388 | |
d62a17ae | 389 | return; |
718e3744 | 390 | } |
391 | ||
392 | /* If ifp has same link-local address then return 1. */ | |
d62a17ae | 393 | static int ripng_lladdr_check(struct interface *ifp, struct in6_addr *addr) |
718e3744 | 394 | { |
d62a17ae | 395 | struct listnode *node; |
396 | struct connected *connected; | |
397 | struct prefix *p; | |
718e3744 | 398 | |
d62a17ae | 399 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) { |
400 | p = connected->address; | |
718e3744 | 401 | |
d62a17ae | 402 | if (p->family == AF_INET6 |
403 | && IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6) | |
404 | && IN6_ARE_ADDR_EQUAL(&p->u.prefix6, addr)) | |
405 | return 1; | |
406 | } | |
407 | return 0; | |
718e3744 | 408 | } |
409 | ||
410 | /* RIPng route garbage collect timer. */ | |
cc9f21da | 411 | static void ripng_garbage_collect(struct thread *t) |
718e3744 | 412 | { |
d62a17ae | 413 | struct ripng_info *rinfo; |
fe08ba7e | 414 | struct agg_node *rp; |
718e3744 | 415 | |
d62a17ae | 416 | rinfo = THREAD_ARG(t); |
718e3744 | 417 | |
d62a17ae | 418 | /* Off timeout timer. */ |
546c8d78 | 419 | THREAD_OFF(rinfo->t_timeout); |
718e3744 | 420 | |
d62a17ae | 421 | /* Get route_node pointer. */ |
422 | rp = rinfo->rp; | |
423 | ||
424 | /* Unlock route_node. */ | |
425 | listnode_delete(rp->info, rinfo); | |
426 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 427 | list_delete((struct list **)&rp->info); |
fe08ba7e | 428 | agg_unlock_node(rp); |
d62a17ae | 429 | } |
718e3744 | 430 | |
d62a17ae | 431 | /* Free RIPng routing information. */ |
432 | ripng_info_free(rinfo); | |
718e3744 | 433 | } |
434 | ||
5c84b9a5 | 435 | static void ripng_timeout_update(struct ripng *ripng, struct ripng_info *rinfo); |
c880b636 FL |
436 | |
437 | /* Add new route to the ECMP list. | |
fac76f9c FL |
438 | * RETURN: the new entry added in the list, or NULL if it is not the first |
439 | * entry and ECMP is not allowed. | |
c880b636 | 440 | */ |
5c84b9a5 RW |
441 | struct ripng_info *ripng_ecmp_add(struct ripng *ripng, |
442 | struct ripng_info *rinfo_new) | |
718e3744 | 443 | { |
fe08ba7e | 444 | struct agg_node *rp = rinfo_new->rp; |
d62a17ae | 445 | struct ripng_info *rinfo = NULL; |
446 | struct list *list = NULL; | |
718e3744 | 447 | |
d62a17ae | 448 | if (rp->info == NULL) |
449 | rp->info = list_new(); | |
450 | list = (struct list *)rp->info; | |
718e3744 | 451 | |
d62a17ae | 452 | /* If ECMP is not allowed and some entry already exists in the list, |
453 | * do nothing. */ | |
454 | if (listcount(list) && !ripng->ecmp) | |
455 | return NULL; | |
fac76f9c | 456 | |
d62a17ae | 457 | rinfo = ripng_info_new(); |
458 | memcpy(rinfo, rinfo_new, sizeof(struct ripng_info)); | |
459 | listnode_add(list, rinfo); | |
c880b636 | 460 | |
d62a17ae | 461 | if (ripng_route_rte(rinfo)) { |
5c84b9a5 RW |
462 | ripng_timeout_update(ripng, rinfo); |
463 | ripng_zebra_ipv6_add(ripng, rp); | |
d62a17ae | 464 | } |
c880b636 | 465 | |
d62a17ae | 466 | ripng_aggregate_increment(rp, rinfo); |
c880b636 | 467 | |
d62a17ae | 468 | /* Set the route change flag on the first entry. */ |
469 | rinfo = listgetdata(listhead(list)); | |
470 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 471 | |
d62a17ae | 472 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 473 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
c880b636 | 474 | |
d62a17ae | 475 | return rinfo; |
c880b636 FL |
476 | } |
477 | ||
478 | /* Replace the ECMP list with the new route. | |
479 | * RETURN: the new entry added in the list | |
480 | */ | |
5c84b9a5 RW |
481 | struct ripng_info *ripng_ecmp_replace(struct ripng *ripng, |
482 | struct ripng_info *rinfo_new) | |
d62a17ae | 483 | { |
fe08ba7e | 484 | struct agg_node *rp = rinfo_new->rp; |
d62a17ae | 485 | struct list *list = (struct list *)rp->info; |
486 | struct ripng_info *rinfo = NULL, *tmp_rinfo = NULL; | |
487 | struct listnode *node = NULL, *nextnode = NULL; | |
488 | ||
489 | if (list == NULL || listcount(list) == 0) | |
5c84b9a5 | 490 | return ripng_ecmp_add(ripng, rinfo_new); |
d62a17ae | 491 | |
492 | /* Get the first entry */ | |
493 | rinfo = listgetdata(listhead(list)); | |
494 | ||
495 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
496 | if (ripng_route_rte(rinfo) && !ripng_route_rte(rinfo_new)) | |
497 | if (CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
5c84b9a5 | 498 | ripng_zebra_ipv6_delete(ripng, rp); |
d62a17ae | 499 | |
500 | if (rinfo->metric != RIPNG_METRIC_INFINITY) | |
501 | ripng_aggregate_decrement_list(rp, list); | |
502 | ||
503 | /* Re-use the first entry, and delete the others. */ | |
504 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
505 | if (tmp_rinfo != rinfo) { | |
546c8d78 DS |
506 | THREAD_OFF(tmp_rinfo->t_timeout); |
507 | THREAD_OFF(tmp_rinfo->t_garbage_collect); | |
d62a17ae | 508 | list_delete_node(list, node); |
509 | ripng_info_free(tmp_rinfo); | |
510 | } | |
c880b636 | 511 | |
546c8d78 DS |
512 | THREAD_OFF(rinfo->t_timeout); |
513 | THREAD_OFF(rinfo->t_garbage_collect); | |
d62a17ae | 514 | memcpy(rinfo, rinfo_new, sizeof(struct ripng_info)); |
c880b636 | 515 | |
d62a17ae | 516 | if (ripng_route_rte(rinfo)) { |
5c84b9a5 | 517 | ripng_timeout_update(ripng, rinfo); |
d62a17ae | 518 | /* The ADD message implies an update. */ |
5c84b9a5 | 519 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 520 | } |
521 | ||
522 | ripng_aggregate_increment(rp, rinfo); | |
523 | ||
524 | /* Set the route change flag. */ | |
525 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 526 | |
d62a17ae | 527 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 528 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
718e3744 | 529 | |
d62a17ae | 530 | return rinfo; |
c880b636 FL |
531 | } |
532 | ||
533 | /* Delete one route from the ECMP list. | |
534 | * RETURN: | |
535 | * null - the entry is freed, and other entries exist in the list | |
536 | * the entry - the entry is the last one in the list; its metric is set | |
537 | * to INFINITY, and the garbage collector is started for it | |
538 | */ | |
5c84b9a5 RW |
539 | struct ripng_info *ripng_ecmp_delete(struct ripng *ripng, |
540 | struct ripng_info *rinfo) | |
d62a17ae | 541 | { |
fe08ba7e | 542 | struct agg_node *rp = rinfo->rp; |
d62a17ae | 543 | struct list *list = (struct list *)rp->info; |
544 | ||
546c8d78 | 545 | THREAD_OFF(rinfo->t_timeout); |
d62a17ae | 546 | |
547 | if (rinfo->metric != RIPNG_METRIC_INFINITY) | |
548 | ripng_aggregate_decrement(rp, rinfo); | |
549 | ||
550 | if (listcount(list) > 1) { | |
551 | /* Some other ECMP entries still exist. Just delete this entry. | |
552 | */ | |
546c8d78 | 553 | THREAD_OFF(rinfo->t_garbage_collect); |
d62a17ae | 554 | listnode_delete(list, rinfo); |
555 | if (ripng_route_rte(rinfo) | |
556 | && CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
557 | /* The ADD message implies the update. */ | |
5c84b9a5 | 558 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 559 | ripng_info_free(rinfo); |
560 | rinfo = NULL; | |
561 | } else { | |
562 | assert(rinfo == listgetdata(listhead(list))); | |
563 | ||
564 | /* This is the only entry left in the list. We must keep it in | |
565 | * the list for garbage collection time, with INFINITY metric. | |
566 | */ | |
567 | ||
568 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
569 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, ripng_garbage_collect, | |
570 | ripng->garbage_time); | |
571 | ||
572 | if (ripng_route_rte(rinfo) | |
573 | && CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
5c84b9a5 | 574 | ripng_zebra_ipv6_delete(ripng, rp); |
d62a17ae | 575 | } |
c880b636 | 576 | |
d62a17ae | 577 | /* Set the route change flag on the first entry. */ |
578 | rinfo = listgetdata(listhead(list)); | |
579 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 580 | |
d62a17ae | 581 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 582 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
c880b636 | 583 | |
d62a17ae | 584 | return rinfo; |
c880b636 FL |
585 | } |
586 | ||
587 | /* Timeout RIPng routes. */ | |
cc9f21da | 588 | static void ripng_timeout(struct thread *t) |
c880b636 | 589 | { |
5c84b9a5 RW |
590 | struct ripng_info *rinfo = THREAD_ARG(t); |
591 | struct ripng *ripng = ripng_info_get_instance(rinfo); | |
592 | ||
593 | ripng_ecmp_delete(ripng, rinfo); | |
718e3744 | 594 | } |
595 | ||
5c84b9a5 | 596 | static void ripng_timeout_update(struct ripng *ripng, struct ripng_info *rinfo) |
718e3744 | 597 | { |
d62a17ae | 598 | if (rinfo->metric != RIPNG_METRIC_INFINITY) { |
546c8d78 | 599 | THREAD_OFF(rinfo->t_timeout); |
5c84b9a5 RW |
600 | thread_add_timer(master, ripng_timeout, rinfo, |
601 | ripng->timeout_time, &rinfo->t_timeout); | |
d62a17ae | 602 | } |
718e3744 | 603 | } |
604 | ||
d62a17ae | 605 | static int ripng_filter(int ripng_distribute, struct prefix_ipv6 *p, |
606 | struct ripng_interface *ri) | |
607 | { | |
608 | struct distribute *dist; | |
609 | struct access_list *alist; | |
610 | struct prefix_list *plist; | |
611 | int distribute = ripng_distribute == RIPNG_FILTER_OUT | |
612 | ? DISTRIBUTE_V6_OUT | |
613 | : DISTRIBUTE_V6_IN; | |
614 | const char *inout = ripng_distribute == RIPNG_FILTER_OUT ? "out" : "in"; | |
615 | ||
616 | /* Input distribute-list filtering. */ | |
617 | if (ri->list[ripng_distribute]) { | |
618 | if (access_list_apply(ri->list[ripng_distribute], | |
619 | (struct prefix *)p) | |
620 | == FILTER_DENY) { | |
621 | if (IS_RIPNG_DEBUG_PACKET) | |
e0259674 | 622 | zlog_debug("%pFX filtered by distribute %s", p, |
d62a17ae | 623 | inout); |
624 | return -1; | |
625 | } | |
626 | } | |
627 | if (ri->prefix[ripng_distribute]) { | |
628 | if (prefix_list_apply(ri->prefix[ripng_distribute], | |
629 | (struct prefix *)p) | |
630 | == PREFIX_DENY) { | |
631 | if (IS_RIPNG_DEBUG_PACKET) | |
e0259674 | 632 | zlog_debug("%pFX filtered by prefix-list %s", p, |
d62a17ae | 633 | inout); |
634 | return -1; | |
a94434b6 | 635 | } |
a94434b6 | 636 | } |
a94434b6 | 637 | |
d62a17ae | 638 | /* All interface filter check. */ |
dde7b15b | 639 | dist = distribute_lookup(ri->ripng->distribute_ctx, NULL); |
d62a17ae | 640 | if (dist) { |
641 | if (dist->list[distribute]) { | |
642 | alist = access_list_lookup(AFI_IP6, | |
643 | dist->list[distribute]); | |
644 | ||
645 | if (alist) { | |
646 | if (access_list_apply(alist, (struct prefix *)p) | |
647 | == FILTER_DENY) { | |
648 | if (IS_RIPNG_DEBUG_PACKET) | |
649 | zlog_debug( | |
e0259674 DS |
650 | "%pFX filtered by distribute %s", |
651 | p, inout); | |
d62a17ae | 652 | return -1; |
653 | } | |
654 | } | |
a94434b6 | 655 | } |
d62a17ae | 656 | if (dist->prefix[distribute]) { |
657 | plist = prefix_list_lookup(AFI_IP6, | |
658 | dist->prefix[distribute]); | |
659 | ||
660 | if (plist) { | |
661 | if (prefix_list_apply(plist, (struct prefix *)p) | |
662 | == PREFIX_DENY) { | |
663 | if (IS_RIPNG_DEBUG_PACKET) | |
664 | zlog_debug( | |
e0259674 DS |
665 | "%pFX filtered by prefix-list %s", |
666 | p, inout); | |
d62a17ae | 667 | return -1; |
668 | } | |
669 | } | |
a94434b6 | 670 | } |
a94434b6 | 671 | } |
d62a17ae | 672 | return 0; |
a94434b6 | 673 | } |
674 | ||
718e3744 | 675 | /* Process RIPng route according to RFC2080. */ |
d62a17ae | 676 | static void ripng_route_process(struct rte *rte, struct sockaddr_in6 *from, |
677 | struct ripng_nexthop *ripng_nexthop, | |
678 | struct interface *ifp) | |
679 | { | |
680 | int ret; | |
681 | struct prefix_ipv6 p; | |
fe08ba7e | 682 | struct agg_node *rp; |
d62a17ae | 683 | struct ripng_info *rinfo = NULL, newinfo; |
684 | struct ripng_interface *ri; | |
5c84b9a5 | 685 | struct ripng *ripng; |
d62a17ae | 686 | struct in6_addr *nexthop; |
687 | int same = 0; | |
688 | struct list *list = NULL; | |
689 | struct listnode *node = NULL; | |
690 | ||
691 | /* Make prefix structure. */ | |
692 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
693 | p.family = AF_INET6; | |
694 | /* p.prefix = rte->addr; */ | |
695 | IPV6_ADDR_COPY(&p.prefix, &rte->addr); | |
696 | p.prefixlen = rte->prefixlen; | |
697 | ||
698 | /* Make sure mask is applied. */ | |
699 | /* XXX We have to check the prefix is valid or not before call | |
700 | apply_mask_ipv6. */ | |
701 | apply_mask_ipv6(&p); | |
702 | ||
d62a17ae | 703 | ri = ifp->info; |
5c84b9a5 | 704 | ripng = ri->ripng; |
d62a17ae | 705 | |
5c84b9a5 | 706 | /* Apply input filters. */ |
d62a17ae | 707 | ret = ripng_filter(RIPNG_FILTER_IN, &p, ri); |
708 | if (ret < 0) | |
709 | return; | |
710 | ||
711 | memset(&newinfo, 0, sizeof(newinfo)); | |
712 | newinfo.type = ZEBRA_ROUTE_RIPNG; | |
713 | newinfo.sub_type = RIPNG_ROUTE_RTE; | |
714 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) | |
715 | newinfo.nexthop = ripng_nexthop->address; | |
716 | else | |
717 | newinfo.nexthop = from->sin6_addr; | |
718 | newinfo.from = from->sin6_addr; | |
719 | newinfo.ifindex = ifp->ifindex; | |
720 | newinfo.metric = rte->metric; | |
721 | newinfo.metric_out = rte->metric; /* XXX */ | |
722 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
723 | ||
724 | /* Modify entry. */ | |
725 | if (ri->routemap[RIPNG_FILTER_IN]) { | |
d62a17ae | 726 | ret = route_map_apply(ri->routemap[RIPNG_FILTER_IN], |
1782514f | 727 | (struct prefix *)&p, &newinfo); |
d62a17ae | 728 | |
729 | if (ret == RMAP_DENYMATCH) { | |
730 | if (IS_RIPNG_DEBUG_PACKET) | |
731 | zlog_debug( | |
2e5b3f37 MS |
732 | "RIPng %pFX is filtered by route-map in", |
733 | &p); | |
d62a17ae | 734 | return; |
735 | } | |
718e3744 | 736 | |
d62a17ae | 737 | /* Get back the object */ |
738 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) { | |
739 | if (!IPV6_ADDR_SAME(&newinfo.nexthop, | |
740 | &ripng_nexthop->address)) { | |
741 | /* the nexthop get changed by the routemap */ | |
742 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop)) | |
743 | ripng_nexthop->address = | |
744 | newinfo.nexthop; | |
745 | else | |
746 | ripng_nexthop->address = in6addr_any; | |
747 | } | |
748 | } else { | |
749 | if (!IPV6_ADDR_SAME(&newinfo.nexthop, | |
750 | &from->sin6_addr)) { | |
751 | /* the nexthop get changed by the routemap */ | |
752 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop)) { | |
753 | ripng_nexthop->flag = | |
754 | RIPNG_NEXTHOP_ADDRESS; | |
755 | ripng_nexthop->address = | |
756 | newinfo.nexthop; | |
757 | } | |
758 | } | |
759 | } | |
760 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
9d303b37 DL |
761 | rte->metric = |
762 | newinfo.metric_out; /* XXX: the routemap uses the | |
763 | metric_out field */ | |
d62a17ae | 764 | } |
a94434b6 | 765 | |
d62a17ae | 766 | /* Once the entry has been validated, update the metric by |
767 | * adding the cost of the network on wich the message | |
768 | * arrived. If the result is greater than infinity, use infinity | |
769 | * (RFC2453 Sec. 3.9.2) | |
770 | **/ | |
771 | ||
772 | /* Zebra ripngd can handle offset-list in. */ | |
5c84b9a5 | 773 | ret = ripng_offset_list_apply_in(ripng, &p, ifp, &rte->metric); |
d62a17ae | 774 | |
775 | /* If offset-list does not modify the metric use interface's | |
776 | * one. */ | |
777 | if (!ret) | |
778 | rte->metric += ifp->metric ? ifp->metric : 1; | |
779 | ||
780 | if (rte->metric > RIPNG_METRIC_INFINITY) | |
781 | rte->metric = RIPNG_METRIC_INFINITY; | |
782 | ||
783 | /* Set nexthop pointer. */ | |
784 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) | |
785 | nexthop = &ripng_nexthop->address; | |
786 | else | |
787 | nexthop = &from->sin6_addr; | |
788 | ||
789 | /* Lookup RIPng routing table. */ | |
fe08ba7e | 790 | rp = agg_node_get(ripng->table, (struct prefix *)&p); |
d62a17ae | 791 | |
792 | newinfo.rp = rp; | |
793 | newinfo.nexthop = *nexthop; | |
794 | newinfo.metric = rte->metric; | |
795 | newinfo.tag = ntohs(rte->tag); | |
796 | ||
797 | /* Check to see whether there is already RIPng route on the table. */ | |
798 | if ((list = rp->info) != NULL) | |
799 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
800 | /* Need to compare with redistributed entry or local | |
801 | * entry */ | |
802 | if (!ripng_route_rte(rinfo)) | |
803 | break; | |
804 | ||
805 | if (IPV6_ADDR_SAME(&rinfo->from, &from->sin6_addr) | |
806 | && IPV6_ADDR_SAME(&rinfo->nexthop, nexthop)) | |
807 | break; | |
808 | ||
809 | if (!listnextnode(node)) { | |
810 | /* Not found in the list */ | |
811 | ||
812 | if (rte->metric > rinfo->metric) { | |
813 | /* New route has a greater metric. | |
814 | * Discard it. */ | |
fe08ba7e | 815 | agg_unlock_node(rp); |
d62a17ae | 816 | return; |
817 | } | |
818 | ||
819 | if (rte->metric < rinfo->metric) | |
820 | /* New route has a smaller metric. | |
821 | * Replace the ECMP list | |
822 | * with the new one in below. */ | |
823 | break; | |
824 | ||
825 | /* Metrics are same. Unless ECMP is disabled, | |
826 | * keep "rinfo" null and | |
827 | * the new route is added in the ECMP list in | |
828 | * below. */ | |
829 | if (!ripng->ecmp) | |
830 | break; | |
831 | } | |
832 | } | |
718e3744 | 833 | |
d62a17ae | 834 | if (rinfo) { |
835 | /* Redistributed route check. */ | |
836 | if (rinfo->type != ZEBRA_ROUTE_RIPNG | |
837 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 838 | agg_unlock_node(rp); |
d62a17ae | 839 | return; |
840 | } | |
a94434b6 | 841 | |
d62a17ae | 842 | /* Local static route. */ |
843 | if (rinfo->type == ZEBRA_ROUTE_RIPNG | |
844 | && ((rinfo->sub_type == RIPNG_ROUTE_STATIC) | |
845 | || (rinfo->sub_type == RIPNG_ROUTE_DEFAULT)) | |
846 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 847 | agg_unlock_node(rp); |
d62a17ae | 848 | return; |
849 | } | |
850 | } | |
a94434b6 | 851 | |
d62a17ae | 852 | if (!rinfo) { |
853 | /* Now, check to see whether there is already an explicit route | |
854 | for the destination prefix. If there is no such route, add | |
855 | this route to the routing table, unless the metric is | |
856 | infinity (there is no point in adding a route which | |
857 | unusable). */ | |
858 | if (rte->metric != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 859 | ripng_ecmp_add(ripng, &newinfo); |
3e7a9652 | 860 | else |
fe08ba7e | 861 | agg_unlock_node(rp); |
d62a17ae | 862 | } else { |
863 | /* If there is an existing route, compare the next hop address | |
864 | to the address of the router from which the datagram came. | |
865 | If this datagram is from the same router as the existing | |
866 | route, reinitialize the timeout. */ | |
867 | same = (IN6_ARE_ADDR_EQUAL(&rinfo->from, &from->sin6_addr) | |
868 | && (rinfo->ifindex == ifp->ifindex)); | |
869 | ||
870 | /* | |
871 | * RFC 2080 - Section 2.4.2: | |
872 | * "If the new metric is the same as the old one, examine the | |
873 | * timeout | |
874 | * for the existing route. If it is at least halfway to the | |
875 | * expiration | |
876 | * point, switch to the new route. This heuristic is optional, | |
877 | * but | |
878 | * highly recommended". | |
879 | */ | |
880 | if (!ripng->ecmp && !same && rinfo->metric == rte->metric | |
881 | && rinfo->t_timeout | |
882 | && (thread_timer_remain_second(rinfo->t_timeout) | |
883 | < (ripng->timeout_time / 2))) { | |
5c84b9a5 | 884 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 885 | } |
886 | /* Next, compare the metrics. If the datagram is from the same | |
887 | router as the existing route, and the new metric is different | |
888 | than the old one; or, if the new metric is lower than the old | |
889 | one; do the following actions: */ | |
890 | else if ((same && rinfo->metric != rte->metric) | |
891 | || rte->metric < rinfo->metric) { | |
892 | if (listcount(list) == 1) { | |
893 | if (newinfo.metric != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 894 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 895 | else |
5c84b9a5 | 896 | ripng_ecmp_delete(ripng, rinfo); |
d62a17ae | 897 | } else { |
898 | if (newinfo.metric < rinfo->metric) | |
5c84b9a5 | 899 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 900 | else /* newinfo.metric > rinfo->metric */ |
5c84b9a5 | 901 | ripng_ecmp_delete(ripng, rinfo); |
d62a17ae | 902 | } |
903 | } else /* same & no change */ | |
5c84b9a5 | 904 | ripng_timeout_update(ripng, rinfo); |
d62a17ae | 905 | |
906 | /* Unlock tempolary lock of the route. */ | |
fe08ba7e | 907 | agg_unlock_node(rp); |
d62a17ae | 908 | } |
718e3744 | 909 | } |
910 | ||
d62a17ae | 911 | /* Add redistributed route to RIPng table. */ |
5c84b9a5 RW |
912 | void ripng_redistribute_add(struct ripng *ripng, int type, int sub_type, |
913 | struct prefix_ipv6 *p, ifindex_t ifindex, | |
914 | struct in6_addr *nexthop, route_tag_t tag) | |
d62a17ae | 915 | { |
fe08ba7e | 916 | struct agg_node *rp; |
d62a17ae | 917 | struct ripng_info *rinfo = NULL, newinfo; |
918 | struct list *list = NULL; | |
919 | ||
920 | /* Redistribute route */ | |
921 | if (IN6_IS_ADDR_LINKLOCAL(&p->prefix)) | |
922 | return; | |
923 | if (IN6_IS_ADDR_LOOPBACK(&p->prefix)) | |
924 | return; | |
925 | ||
fe08ba7e | 926 | rp = agg_node_get(ripng->table, (struct prefix *)p); |
d62a17ae | 927 | |
6006b807 | 928 | memset(&newinfo, 0, sizeof(newinfo)); |
d62a17ae | 929 | newinfo.type = type; |
930 | newinfo.sub_type = sub_type; | |
931 | newinfo.ifindex = ifindex; | |
932 | newinfo.metric = 1; | |
933 | if (tag <= UINT16_MAX) /* RIPng only supports 16 bit tags */ | |
934 | newinfo.tag = tag; | |
935 | newinfo.rp = rp; | |
936 | if (nexthop && IN6_IS_ADDR_LINKLOCAL(nexthop)) | |
937 | newinfo.nexthop = *nexthop; | |
938 | ||
939 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
940 | rinfo = listgetdata(listhead(list)); | |
941 | ||
942 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
943 | && rinfo->sub_type == RIPNG_ROUTE_INTERFACE | |
944 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 945 | agg_unlock_node(rp); |
d62a17ae | 946 | return; |
947 | } | |
948 | ||
949 | /* Manually configured RIPng route check. | |
950 | * They have the precedence on all the other entries. | |
951 | **/ | |
952 | if (rinfo->type == ZEBRA_ROUTE_RIPNG | |
953 | && ((rinfo->sub_type == RIPNG_ROUTE_STATIC) | |
954 | || (rinfo->sub_type == RIPNG_ROUTE_DEFAULT))) { | |
955 | if (type != ZEBRA_ROUTE_RIPNG | |
956 | || ((sub_type != RIPNG_ROUTE_STATIC) | |
957 | && (sub_type != RIPNG_ROUTE_DEFAULT))) { | |
fe08ba7e | 958 | agg_unlock_node(rp); |
d62a17ae | 959 | return; |
960 | } | |
961 | } | |
718e3744 | 962 | |
5c84b9a5 | 963 | ripng_ecmp_replace(ripng, &newinfo); |
fe08ba7e | 964 | agg_unlock_node(rp); |
d62a17ae | 965 | } else |
5c84b9a5 | 966 | ripng_ecmp_add(ripng, &newinfo); |
d62a17ae | 967 | |
968 | if (IS_RIPNG_DEBUG_EVENT) { | |
969 | if (!nexthop) | |
970 | zlog_debug( | |
e0259674 DS |
971 | "Redistribute new prefix %pFX on the interface %s", |
972 | p, ifindex2ifname(ifindex, ripng->vrf->vrf_id)); | |
d62a17ae | 973 | else |
974 | zlog_debug( | |
2e5b3f37 MS |
975 | "Redistribute new prefix %pFX with nexthop %pI6 on the interface %s", |
976 | p, nexthop, | |
dde7b15b | 977 | ifindex2ifname(ifindex, ripng->vrf->vrf_id)); |
d62a17ae | 978 | } |
718e3744 | 979 | |
5c84b9a5 | 980 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 981 | } |
718e3744 | 982 | |
d62a17ae | 983 | /* Delete redistributed route to RIPng table. */ |
5c84b9a5 RW |
984 | void ripng_redistribute_delete(struct ripng *ripng, int type, int sub_type, |
985 | struct prefix_ipv6 *p, ifindex_t ifindex) | |
d62a17ae | 986 | { |
fe08ba7e | 987 | struct agg_node *rp; |
d62a17ae | 988 | struct ripng_info *rinfo; |
989 | ||
990 | if (IN6_IS_ADDR_LINKLOCAL(&p->prefix)) | |
991 | return; | |
992 | if (IN6_IS_ADDR_LOOPBACK(&p->prefix)) | |
993 | return; | |
994 | ||
fe08ba7e | 995 | rp = agg_node_lookup(ripng->table, (struct prefix *)p); |
d62a17ae | 996 | |
997 | if (rp) { | |
998 | struct list *list = rp->info; | |
999 | ||
1000 | if (list != NULL && listcount(list) != 0) { | |
1001 | rinfo = listgetdata(listhead(list)); | |
1002 | if (rinfo != NULL && rinfo->type == type | |
1003 | && rinfo->sub_type == sub_type | |
1004 | && rinfo->ifindex == ifindex) { | |
1005 | /* Perform poisoned reverse. */ | |
1006 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
1007 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, | |
1008 | ripng_garbage_collect, | |
1009 | ripng->garbage_time); | |
546c8d78 | 1010 | THREAD_OFF(rinfo->t_timeout); |
d62a17ae | 1011 | |
1012 | /* Aggregate count decrement. */ | |
1013 | ripng_aggregate_decrement(rp, rinfo); | |
1014 | ||
1015 | rinfo->flags |= RIPNG_RTF_CHANGED; | |
1016 | ||
1017 | if (IS_RIPNG_DEBUG_EVENT) | |
1018 | zlog_debug( | |
e0259674 DS |
1019 | "Poisone %pFX on the interface %s with an infinity metric [delete]", |
1020 | p, | |
dde7b15b RW |
1021 | ifindex2ifname( |
1022 | ifindex, | |
1023 | ripng->vrf->vrf_id)); | |
d62a17ae | 1024 | |
5c84b9a5 | 1025 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1026 | } |
1027 | } | |
fe08ba7e | 1028 | agg_unlock_node(rp); |
d62a17ae | 1029 | } |
718e3744 | 1030 | } |
1031 | ||
1032 | /* Withdraw redistributed route. */ | |
5c84b9a5 | 1033 | void ripng_redistribute_withdraw(struct ripng *ripng, int type) |
d62a17ae | 1034 | { |
fe08ba7e | 1035 | struct agg_node *rp; |
d62a17ae | 1036 | struct ripng_info *rinfo = NULL; |
1037 | struct list *list = NULL; | |
1038 | ||
fe08ba7e | 1039 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 1040 | if ((list = rp->info) != NULL) { |
1041 | rinfo = listgetdata(listhead(list)); | |
1042 | if ((rinfo->type == type) | |
1043 | && (rinfo->sub_type != RIPNG_ROUTE_INTERFACE)) { | |
1044 | /* Perform poisoned reverse. */ | |
1045 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
1046 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, | |
1047 | ripng_garbage_collect, | |
1048 | ripng->garbage_time); | |
546c8d78 | 1049 | THREAD_OFF(rinfo->t_timeout); |
d62a17ae | 1050 | |
1051 | /* Aggregate count decrement. */ | |
1052 | ripng_aggregate_decrement(rp, rinfo); | |
1053 | ||
1054 | rinfo->flags |= RIPNG_RTF_CHANGED; | |
1055 | ||
1056 | if (IS_RIPNG_DEBUG_EVENT) { | |
1057 | struct prefix_ipv6 *p = | |
26a3ffd6 DS |
1058 | (struct prefix_ipv6 *) |
1059 | agg_node_get_prefix(rp); | |
d62a17ae | 1060 | |
1061 | zlog_debug( | |
e0259674 DS |
1062 | "Poisone %pFX on the interface %s [withdraw]", |
1063 | p, | |
dde7b15b RW |
1064 | ifindex2ifname( |
1065 | rinfo->ifindex, | |
1066 | ripng->vrf->vrf_id)); | |
d62a17ae | 1067 | } |
1068 | ||
5c84b9a5 | 1069 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1070 | } |
1071 | } | |
1072 | } | |
718e3744 | 1073 | |
d62a17ae | 1074 | /* RIP routing information. */ |
1075 | static void ripng_response_process(struct ripng_packet *packet, int size, | |
1076 | struct sockaddr_in6 *from, | |
1077 | struct interface *ifp, int hoplimit) | |
1078 | { | |
5c84b9a5 RW |
1079 | struct ripng_interface *ri = ifp->info; |
1080 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 1081 | caddr_t lim; |
1082 | struct rte *rte; | |
1083 | struct ripng_nexthop nexthop; | |
1084 | ||
1085 | /* RFC2080 2.4.2 Response Messages: | |
1086 | The Response must be ignored if it is not from the RIPng port. */ | |
1087 | if (ntohs(from->sin6_port) != RIPNG_PORT_DEFAULT) { | |
2e5b3f37 MS |
1088 | zlog_warn("RIPng packet comes from non RIPng port %d from %pI6", |
1089 | ntohs(from->sin6_port), &from->sin6_addr); | |
5c84b9a5 | 1090 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1091 | return; |
1092 | } | |
718e3744 | 1093 | |
d62a17ae | 1094 | /* The datagram's IPv6 source address should be checked to see |
1095 | whether the datagram is from a valid neighbor; the source of the | |
1096 | datagram must be a link-local address. */ | |
1097 | if (!IN6_IS_ADDR_LINKLOCAL(&from->sin6_addr)) { | |
2e5b3f37 MS |
1098 | zlog_warn("RIPng packet comes from non link local address %pI6", |
1099 | &from->sin6_addr); | |
5c84b9a5 | 1100 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1101 | return; |
1102 | } | |
a94434b6 | 1103 | |
d62a17ae | 1104 | /* It is also worth checking to see whether the response is from one |
1105 | of the router's own addresses. Interfaces on broadcast networks | |
1106 | may receive copies of their own multicasts immediately. If a | |
1107 | router processes its own output as new input, confusion is likely, | |
1108 | and such datagrams must be ignored. */ | |
1109 | if (ripng_lladdr_check(ifp, &from->sin6_addr)) { | |
1110 | zlog_warn( | |
2e5b3f37 MS |
1111 | "RIPng packet comes from my own link local address %pI6", |
1112 | &from->sin6_addr); | |
5c84b9a5 | 1113 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1114 | return; |
1115 | } | |
a94434b6 | 1116 | |
d62a17ae | 1117 | /* As an additional check, periodic advertisements must have their |
1118 | hop counts set to 255, and inbound, multicast packets sent from the | |
1119 | RIPng port (i.e. periodic advertisement or triggered update | |
1120 | packets) must be examined to ensure that the hop count is 255. */ | |
1121 | if (hoplimit >= 0 && hoplimit != 255) { | |
1122 | zlog_warn( | |
2e5b3f37 MS |
1123 | "RIPng packet comes with non 255 hop count %d from %pI6", |
1124 | hoplimit, &from->sin6_addr); | |
5c84b9a5 | 1125 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1126 | return; |
1127 | } | |
718e3744 | 1128 | |
d62a17ae | 1129 | /* Update RIPng peer. */ |
5c84b9a5 | 1130 | ripng_peer_update(ripng, from, packet->version); |
a94434b6 | 1131 | |
d62a17ae | 1132 | /* Reset nexthop. */ |
6006b807 | 1133 | memset(&nexthop, 0, sizeof(nexthop)); |
d62a17ae | 1134 | nexthop.flag = RIPNG_NEXTHOP_UNSPEC; |
718e3744 | 1135 | |
d62a17ae | 1136 | /* Set RTE pointer. */ |
1137 | rte = packet->rte; | |
718e3744 | 1138 | |
d62a17ae | 1139 | for (lim = ((caddr_t)packet) + size; (caddr_t)rte < lim; rte++) { |
1140 | /* First of all, we have to check this RTE is next hop RTE or | |
1141 | not. Next hop RTE is completely different with normal RTE so | |
1142 | we need special treatment. */ | |
1143 | if (rte->metric == RIPNG_METRIC_NEXTHOP) { | |
1144 | ripng_nexthop_rte(rte, from, &nexthop); | |
1145 | continue; | |
1146 | } | |
718e3744 | 1147 | |
d62a17ae | 1148 | /* RTE information validation. */ |
1149 | ||
1150 | /* - is the destination prefix valid (e.g., not a multicast | |
1151 | prefix and not a link-local address) A link-local address | |
1152 | should never be present in an RTE. */ | |
1153 | if (IN6_IS_ADDR_MULTICAST(&rte->addr)) { | |
1154 | zlog_warn( | |
2e5b3f37 MS |
1155 | "Destination prefix is a multicast address %pI6/%d [%d]", |
1156 | &rte->addr, rte->prefixlen, rte->metric); | |
5c84b9a5 | 1157 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1158 | continue; |
1159 | } | |
1160 | if (IN6_IS_ADDR_LINKLOCAL(&rte->addr)) { | |
1161 | zlog_warn( | |
2e5b3f37 MS |
1162 | "Destination prefix is a link-local address %pI6/%d [%d]", |
1163 | &rte->addr, rte->prefixlen, rte->metric); | |
5c84b9a5 | 1164 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1165 | continue; |
1166 | } | |
1167 | if (IN6_IS_ADDR_LOOPBACK(&rte->addr)) { | |
1168 | zlog_warn( | |
2e5b3f37 MS |
1169 | "Destination prefix is a loopback address %pI6/%d [%d]", |
1170 | &rte->addr, rte->prefixlen, rte->metric); | |
5c84b9a5 | 1171 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1172 | continue; |
1173 | } | |
718e3744 | 1174 | |
d62a17ae | 1175 | /* - is the prefix length valid (i.e., between 0 and 128, |
1176 | inclusive) */ | |
13ccce6e | 1177 | if (rte->prefixlen > IPV6_MAX_BITLEN) { |
2e5b3f37 MS |
1178 | zlog_warn("Invalid prefix length %pI6/%d from %pI6%%%s", |
1179 | &rte->addr, rte->prefixlen, | |
1180 | &from->sin6_addr, ifp->name); | |
5c84b9a5 | 1181 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1182 | continue; |
1183 | } | |
718e3744 | 1184 | |
d62a17ae | 1185 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1186 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
2e5b3f37 MS |
1187 | zlog_warn("Invalid metric %d from %pI6%%%s", |
1188 | rte->metric, &from->sin6_addr, ifp->name); | |
5c84b9a5 | 1189 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1190 | continue; |
1191 | } | |
718e3744 | 1192 | |
d62a17ae | 1193 | /* Vincent: XXX Should we compute the direclty reachable nexthop |
1194 | * for our RIPng network ? | |
1195 | **/ | |
718e3744 | 1196 | |
d62a17ae | 1197 | /* Routing table updates. */ |
1198 | ripng_route_process(rte, from, &nexthop, ifp); | |
1199 | } | |
718e3744 | 1200 | } |
1201 | ||
1202 | /* Response to request message. */ | |
d62a17ae | 1203 | static void ripng_request_process(struct ripng_packet *packet, int size, |
1204 | struct sockaddr_in6 *from, | |
1205 | struct interface *ifp) | |
1206 | { | |
5c84b9a5 | 1207 | struct ripng *ripng; |
d62a17ae | 1208 | caddr_t lim; |
1209 | struct rte *rte; | |
1210 | struct prefix_ipv6 p; | |
fe08ba7e | 1211 | struct agg_node *rp; |
d62a17ae | 1212 | struct ripng_info *rinfo; |
1213 | struct ripng_interface *ri; | |
1214 | ||
1215 | /* Does not reponse to the requests on the loopback interfaces */ | |
1216 | if (if_is_loopback(ifp)) | |
1217 | return; | |
1218 | ||
1219 | /* Check RIPng process is enabled on this interface. */ | |
1220 | ri = ifp->info; | |
1221 | if (!ri->running) | |
1222 | return; | |
5c84b9a5 | 1223 | ripng = ri->ripng; |
d62a17ae | 1224 | |
1225 | /* When passive interface is specified, suppress responses */ | |
1226 | if (ri->passive) | |
1227 | return; | |
1228 | ||
1229 | /* RIPng peer update. */ | |
5c84b9a5 | 1230 | ripng_peer_update(ripng, from, packet->version); |
d62a17ae | 1231 | |
1232 | lim = ((caddr_t)packet) + size; | |
1233 | rte = packet->rte; | |
1234 | ||
1235 | /* The Request is processed entry by entry. If there are no | |
1236 | entries, no response is given. */ | |
1237 | if (lim == (caddr_t)rte) | |
1238 | return; | |
1239 | ||
1240 | /* There is one special case. If there is exactly one entry in the | |
1241 | request, and it has a destination prefix of zero, a prefix length | |
1242 | of zero, and a metric of infinity (i.e., 16), then this is a | |
1243 | request to send the entire routing table. In that case, a call | |
1244 | is made to the output process to send the routing table to the | |
1245 | requesting address/port. */ | |
1246 | if (lim == ((caddr_t)(rte + 1)) && IN6_IS_ADDR_UNSPECIFIED(&rte->addr) | |
1247 | && rte->prefixlen == 0 && rte->metric == RIPNG_METRIC_INFINITY) { | |
1248 | /* All route with split horizon */ | |
1249 | ripng_output_process(ifp, from, ripng_all_route); | |
1250 | } else { | |
1251 | /* Except for this special case, processing is quite simple. | |
1252 | Examine the list of RTEs in the Request one by one. For each | |
1253 | entry, look up the destination in the router's routing | |
1254 | database and, if there is a route, put that route's metric in | |
1255 | the metric field of the RTE. If there is no explicit route | |
1256 | to the specified destination, put infinity in the metric | |
1257 | field. Once all the entries have been filled in, change the | |
1258 | command from Request to Response and send the datagram back | |
1259 | to the requestor. */ | |
6006b807 | 1260 | memset(&p, 0, sizeof(p)); |
d62a17ae | 1261 | p.family = AF_INET6; |
1262 | ||
1263 | for (; ((caddr_t)rte) < lim; rte++) { | |
1264 | p.prefix = rte->addr; | |
1265 | p.prefixlen = rte->prefixlen; | |
1266 | apply_mask_ipv6(&p); | |
1267 | ||
fe08ba7e | 1268 | rp = agg_node_lookup(ripng->table, (struct prefix *)&p); |
d62a17ae | 1269 | |
1270 | if (rp) { | |
1271 | rinfo = listgetdata( | |
1272 | listhead((struct list *)rp->info)); | |
1273 | rte->metric = rinfo->metric; | |
fe08ba7e | 1274 | agg_unlock_node(rp); |
d62a17ae | 1275 | } else |
1276 | rte->metric = RIPNG_METRIC_INFINITY; | |
1277 | } | |
1278 | packet->command = RIPNG_RESPONSE; | |
1279 | ||
1280 | ripng_send_packet((caddr_t)packet, size, from, ifp); | |
1281 | } | |
718e3744 | 1282 | } |
1283 | ||
1284 | /* First entry point of reading RIPng packet. */ | |
cc9f21da | 1285 | static void ripng_read(struct thread *thread) |
d62a17ae | 1286 | { |
5c84b9a5 | 1287 | struct ripng *ripng = THREAD_ARG(thread); |
d62a17ae | 1288 | int len; |
1289 | int sock; | |
1290 | struct sockaddr_in6 from; | |
1291 | struct ripng_packet *packet; | |
1292 | ifindex_t ifindex = 0; | |
1293 | struct interface *ifp; | |
1294 | int hoplimit = -1; | |
1295 | ||
1296 | /* Check ripng is active and alive. */ | |
1297 | assert(ripng != NULL); | |
1298 | assert(ripng->sock >= 0); | |
1299 | ||
1300 | /* Fetch thread data and set read pointer to empty for event | |
1301 | managing. `sock' sould be same as ripng->sock. */ | |
1302 | sock = THREAD_FD(thread); | |
d62a17ae | 1303 | |
1304 | /* Add myself to the next event. */ | |
5c84b9a5 | 1305 | ripng_event(ripng, RIPNG_READ, sock); |
d62a17ae | 1306 | |
1307 | /* Read RIPng packet. */ | |
1308 | len = ripng_recv_packet(sock, STREAM_DATA(ripng->ibuf), | |
1309 | STREAM_SIZE(ripng->ibuf), &from, &ifindex, | |
1310 | &hoplimit); | |
1311 | if (len < 0) { | |
dde7b15b RW |
1312 | zlog_warn("RIPng recvfrom failed (VRF %s): %s.", |
1313 | ripng->vrf_name, safe_strerror(errno)); | |
cc9f21da | 1314 | return; |
d62a17ae | 1315 | } |
718e3744 | 1316 | |
d62a17ae | 1317 | /* Check RTE boundary. RTE size (Packet length - RIPng header size |
1318 | (4)) must be multiple size of one RTE size (20). */ | |
1319 | if (((len - 4) % 20) != 0) { | |
2e5b3f37 MS |
1320 | zlog_warn("RIPng invalid packet size %d from %pI6 (VRF %s)", |
1321 | len, &from.sin6_addr, ripng->vrf_name); | |
5c84b9a5 | 1322 | ripng_peer_bad_packet(ripng, &from); |
cc9f21da | 1323 | return; |
d62a17ae | 1324 | } |
718e3744 | 1325 | |
d62a17ae | 1326 | packet = (struct ripng_packet *)STREAM_DATA(ripng->ibuf); |
dde7b15b | 1327 | ifp = if_lookup_by_index(ifindex, ripng->vrf->vrf_id); |
718e3744 | 1328 | |
d62a17ae | 1329 | /* RIPng packet received. */ |
1330 | if (IS_RIPNG_DEBUG_EVENT) | |
dde7b15b | 1331 | zlog_debug( |
2e5b3f37 MS |
1332 | "RIPng packet received from %pI6 port %d on %s (VRF %s)", |
1333 | &from.sin6_addr, ntohs(from.sin6_port), | |
dde7b15b | 1334 | ifp ? ifp->name : "unknown", ripng->vrf_name); |
718e3744 | 1335 | |
d62a17ae | 1336 | /* Logging before packet checking. */ |
1337 | if (IS_RIPNG_DEBUG_RECV) | |
1338 | ripng_packet_dump(packet, len, "RECV"); | |
718e3744 | 1339 | |
d62a17ae | 1340 | /* Packet comes from unknown interface. */ |
1341 | if (ifp == NULL) { | |
dde7b15b RW |
1342 | zlog_warn( |
1343 | "RIPng packet comes from unknown interface %d (VRF %s)", | |
1344 | ifindex, ripng->vrf_name); | |
cc9f21da | 1345 | return; |
d62a17ae | 1346 | } |
718e3744 | 1347 | |
d62a17ae | 1348 | /* Packet version mismatch checking. */ |
1349 | if (packet->version != ripng->version) { | |
1350 | zlog_warn( | |
dde7b15b RW |
1351 | "RIPng packet version %d doesn't fit to my version %d (VRF %s)", |
1352 | packet->version, ripng->version, ripng->vrf_name); | |
5c84b9a5 | 1353 | ripng_peer_bad_packet(ripng, &from); |
cc9f21da | 1354 | return; |
d62a17ae | 1355 | } |
718e3744 | 1356 | |
d62a17ae | 1357 | /* Process RIPng packet. */ |
1358 | switch (packet->command) { | |
1359 | case RIPNG_REQUEST: | |
1360 | ripng_request_process(packet, len, &from, ifp); | |
1361 | break; | |
1362 | case RIPNG_RESPONSE: | |
1363 | ripng_response_process(packet, len, &from, ifp, hoplimit); | |
1364 | break; | |
1365 | default: | |
dde7b15b RW |
1366 | zlog_warn("Invalid RIPng command %d (VRF %s)", packet->command, |
1367 | ripng->vrf_name); | |
5c84b9a5 | 1368 | ripng_peer_bad_packet(ripng, &from); |
d62a17ae | 1369 | break; |
1370 | } | |
718e3744 | 1371 | } |
1372 | ||
1373 | /* Walk down the RIPng routing table then clear changed flag. */ | |
5c84b9a5 | 1374 | static void ripng_clear_changed_flag(struct ripng *ripng) |
718e3744 | 1375 | { |
fe08ba7e | 1376 | struct agg_node *rp; |
d62a17ae | 1377 | struct ripng_info *rinfo = NULL; |
1378 | struct list *list = NULL; | |
1379 | struct listnode *listnode = NULL; | |
718e3744 | 1380 | |
fe08ba7e | 1381 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 1382 | if ((list = rp->info) != NULL) |
1383 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
1384 | UNSET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
1385 | /* This flag can be set only on the first entry. | |
1386 | */ | |
1387 | break; | |
1388 | } | |
718e3744 | 1389 | } |
1390 | ||
1391 | /* Regular update of RIPng route. Send all routing formation to RIPng | |
1392 | enabled interface. */ | |
cc9f21da | 1393 | static void ripng_update(struct thread *t) |
718e3744 | 1394 | { |
5c84b9a5 | 1395 | struct ripng *ripng = THREAD_ARG(t); |
d62a17ae | 1396 | struct interface *ifp; |
1397 | struct ripng_interface *ri; | |
718e3744 | 1398 | |
d62a17ae | 1399 | /* Logging update event. */ |
1400 | if (IS_RIPNG_DEBUG_EVENT) | |
1401 | zlog_debug("RIPng update timer expired!"); | |
718e3744 | 1402 | |
d62a17ae | 1403 | /* Supply routes to each interface. */ |
dde7b15b | 1404 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 1405 | ri = ifp->info; |
718e3744 | 1406 | |
d62a17ae | 1407 | if (if_is_loopback(ifp) || !if_is_up(ifp)) |
1408 | continue; | |
718e3744 | 1409 | |
d62a17ae | 1410 | if (!ri->running) |
1411 | continue; | |
718e3744 | 1412 | |
d62a17ae | 1413 | /* When passive interface is specified, suppress announce to the |
1414 | interface. */ | |
1415 | if (ri->passive) | |
1416 | continue; | |
718e3744 | 1417 | |
1e20238a | 1418 | #ifdef RIPNG_ADVANCED |
d62a17ae | 1419 | if (ri->ri_send == RIPNG_SEND_OFF) { |
1420 | if (IS_RIPNG_DEBUG_EVENT) | |
1421 | zlog_debug( | |
1422 | "[Event] RIPng send to if %d is suppressed by config", | |
1423 | ifp->ifindex); | |
1424 | continue; | |
1425 | } | |
718e3744 | 1426 | #endif /* RIPNG_ADVANCED */ |
1427 | ||
d62a17ae | 1428 | ripng_output_process(ifp, NULL, ripng_all_route); |
1429 | } | |
718e3744 | 1430 | |
d62a17ae | 1431 | /* Triggered updates may be suppressed if a regular update is due by |
1432 | the time the triggered update would be sent. */ | |
69ec2ecb | 1433 | THREAD_OFF(ripng->t_triggered_interval); |
d62a17ae | 1434 | ripng->trigger = 0; |
718e3744 | 1435 | |
d62a17ae | 1436 | /* Reset flush event. */ |
5c84b9a5 | 1437 | ripng_event(ripng, RIPNG_UPDATE_EVENT, 0); |
718e3744 | 1438 | } |
1439 | ||
1440 | /* Triggered update interval timer. */ | |
cc9f21da | 1441 | static void ripng_triggered_interval(struct thread *t) |
718e3744 | 1442 | { |
5c84b9a5 RW |
1443 | struct ripng *ripng = THREAD_ARG(t); |
1444 | ||
d62a17ae | 1445 | if (ripng->trigger) { |
1446 | ripng->trigger = 0; | |
1447 | ripng_triggered_update(t); | |
1448 | } | |
d62a17ae | 1449 | } |
718e3744 | 1450 | |
1451 | /* Execute triggered update. */ | |
cc9f21da | 1452 | void ripng_triggered_update(struct thread *t) |
718e3744 | 1453 | { |
5c84b9a5 | 1454 | struct ripng *ripng = THREAD_ARG(t); |
d62a17ae | 1455 | struct interface *ifp; |
1456 | struct ripng_interface *ri; | |
1457 | int interval; | |
718e3744 | 1458 | |
d62a17ae | 1459 | /* Cancel interval timer. */ |
69ec2ecb | 1460 | THREAD_OFF(ripng->t_triggered_interval); |
d62a17ae | 1461 | ripng->trigger = 0; |
718e3744 | 1462 | |
d62a17ae | 1463 | /* Logging triggered update. */ |
1464 | if (IS_RIPNG_DEBUG_EVENT) | |
1465 | zlog_debug("RIPng triggered update!"); | |
718e3744 | 1466 | |
d62a17ae | 1467 | /* Split Horizon processing is done when generating triggered |
1468 | updates as well as normal updates (see section 2.6). */ | |
dde7b15b | 1469 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 1470 | ri = ifp->info; |
718e3744 | 1471 | |
d62a17ae | 1472 | if (if_is_loopback(ifp) || !if_is_up(ifp)) |
1473 | continue; | |
718e3744 | 1474 | |
d62a17ae | 1475 | if (!ri->running) |
1476 | continue; | |
718e3744 | 1477 | |
d62a17ae | 1478 | /* When passive interface is specified, suppress announce to the |
1479 | interface. */ | |
1480 | if (ri->passive) | |
1481 | continue; | |
718e3744 | 1482 | |
d62a17ae | 1483 | ripng_output_process(ifp, NULL, ripng_changed_route); |
1484 | } | |
718e3744 | 1485 | |
d62a17ae | 1486 | /* Once all of the triggered updates have been generated, the route |
1487 | change flags should be cleared. */ | |
5c84b9a5 | 1488 | ripng_clear_changed_flag(ripng); |
718e3744 | 1489 | |
d62a17ae | 1490 | /* After a triggered update is sent, a timer should be set for a |
1491 | random interval between 1 and 5 seconds. If other changes that | |
1492 | would trigger updates occur before the timer expires, a single | |
1493 | update is triggered when the timer expires. */ | |
5920b3eb | 1494 | interval = (frr_weak_random() % 5) + 1; |
718e3744 | 1495 | |
5c84b9a5 | 1496 | thread_add_timer(master, ripng_triggered_interval, ripng, interval, |
d62a17ae | 1497 | &ripng->t_triggered_interval); |
718e3744 | 1498 | } |
1499 | ||
1500 | /* Write routing table entry to the stream and return next index of | |
1501 | the routing table entry in the stream. */ | |
d62a17ae | 1502 | int ripng_write_rte(int num, struct stream *s, struct prefix_ipv6 *p, |
d7c0a89a | 1503 | struct in6_addr *nexthop, uint16_t tag, uint8_t metric) |
d62a17ae | 1504 | { |
1505 | /* RIPng packet header. */ | |
1506 | if (num == 0) { | |
1507 | stream_putc(s, RIPNG_RESPONSE); | |
1508 | stream_putc(s, RIPNG_V1); | |
1509 | stream_putw(s, 0); | |
1510 | } | |
718e3744 | 1511 | |
d62a17ae | 1512 | /* Write routing table entry. */ |
b575a12c A |
1513 | if (!nexthop) { |
1514 | assert(p); | |
d7c0a89a | 1515 | stream_write(s, (uint8_t *)&p->prefix, sizeof(struct in6_addr)); |
b575a12c | 1516 | } else |
d7c0a89a | 1517 | stream_write(s, (uint8_t *)nexthop, sizeof(struct in6_addr)); |
d62a17ae | 1518 | stream_putw(s, tag); |
1519 | if (p) | |
1520 | stream_putc(s, p->prefixlen); | |
1521 | else | |
1522 | stream_putc(s, 0); | |
1523 | stream_putc(s, metric); | |
718e3744 | 1524 | |
d62a17ae | 1525 | return ++num; |
718e3744 | 1526 | } |
1527 | ||
1528 | /* Send RESPONSE message to specified destination. */ | |
d62a17ae | 1529 | void ripng_output_process(struct interface *ifp, struct sockaddr_in6 *to, |
1530 | int route_type) | |
1531 | { | |
5c84b9a5 | 1532 | struct ripng *ripng; |
d62a17ae | 1533 | int ret; |
fe08ba7e | 1534 | struct agg_node *rp; |
d62a17ae | 1535 | struct ripng_info *rinfo; |
1536 | struct ripng_interface *ri; | |
1537 | struct ripng_aggregate *aggregate; | |
1538 | struct prefix_ipv6 *p; | |
1539 | struct list *ripng_rte_list; | |
1540 | struct list *list = NULL; | |
1541 | struct listnode *listnode = NULL; | |
1542 | ||
1543 | if (IS_RIPNG_DEBUG_EVENT) { | |
1544 | if (to) | |
2e5b3f37 MS |
1545 | zlog_debug("RIPng update routes to neighbor %pI6", |
1546 | &to->sin6_addr); | |
d62a17ae | 1547 | else |
1548 | zlog_debug("RIPng update routes on interface %s", | |
1549 | ifp->name); | |
1550 | } | |
a94434b6 | 1551 | |
5c84b9a5 | 1552 | /* Get RIPng interface and instance. */ |
d62a17ae | 1553 | ri = ifp->info; |
5c84b9a5 | 1554 | ripng = ri->ripng; |
d62a17ae | 1555 | |
1556 | ripng_rte_list = ripng_rte_new(); | |
1557 | ||
fe08ba7e | 1558 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { |
d62a17ae | 1559 | if ((list = rp->info) != NULL |
1560 | && (rinfo = listgetdata(listhead(list))) != NULL | |
1561 | && rinfo->suppress == 0) { | |
1562 | /* If no route-map are applied, the RTE will be these | |
1563 | * following | |
0437e105 | 1564 | * information. |
d62a17ae | 1565 | */ |
26a3ffd6 | 1566 | p = (struct prefix_ipv6 *)agg_node_get_prefix(rp); |
d62a17ae | 1567 | rinfo->metric_out = rinfo->metric; |
1568 | rinfo->tag_out = rinfo->tag; | |
1569 | memset(&rinfo->nexthop_out, 0, | |
1570 | sizeof(rinfo->nexthop_out)); | |
1571 | /* In order to avoid some local loops, | |
1572 | * if the RIPng route has a nexthop via this interface, | |
1573 | * keep the nexthop, | |
1574 | * otherwise set it to 0. The nexthop should not be | |
1575 | * propagated | |
1576 | * beyond the local broadcast/multicast area in order | |
1577 | * to avoid an IGP multi-level recursive look-up. | |
1578 | */ | |
1579 | if (rinfo->ifindex == ifp->ifindex) | |
1580 | rinfo->nexthop_out = rinfo->nexthop; | |
1581 | ||
1582 | /* Apply output filters. */ | |
1583 | ret = ripng_filter(RIPNG_FILTER_OUT, p, ri); | |
1584 | if (ret < 0) | |
1585 | continue; | |
1586 | ||
1587 | /* Changed route only output. */ | |
1588 | if (route_type == ripng_changed_route | |
1589 | && (!(rinfo->flags & RIPNG_RTF_CHANGED))) | |
1590 | continue; | |
1591 | ||
1592 | /* Split horizon. */ | |
1593 | if (ri->split_horizon == RIPNG_SPLIT_HORIZON) { | |
1594 | /* We perform split horizon for RIPng routes. */ | |
1595 | int suppress = 0; | |
1596 | struct ripng_info *tmp_rinfo = NULL; | |
1597 | ||
1598 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
1599 | tmp_rinfo)) | |
1600 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIPNG | |
1601 | && tmp_rinfo->ifindex | |
1602 | == ifp->ifindex) { | |
1603 | suppress = 1; | |
1604 | break; | |
1605 | } | |
1606 | if (suppress) | |
1607 | continue; | |
1608 | } | |
1609 | ||
1610 | /* Preparation for route-map. */ | |
1611 | rinfo->metric_set = 0; | |
1612 | /* nexthop_out, | |
1613 | * metric_out | |
1614 | * and tag_out are already initialized. | |
1615 | */ | |
1616 | ||
1617 | /* Interface route-map */ | |
1618 | if (ri->routemap[RIPNG_FILTER_OUT]) { | |
d62a17ae | 1619 | ret = route_map_apply( |
1620 | ri->routemap[RIPNG_FILTER_OUT], | |
1782514f | 1621 | (struct prefix *)p, rinfo); |
d62a17ae | 1622 | |
1623 | if (ret == RMAP_DENYMATCH) { | |
1624 | if (IS_RIPNG_DEBUG_PACKET) | |
1625 | zlog_debug( | |
e0259674 DS |
1626 | "RIPng %pFX is filtered by route-map out", |
1627 | p); | |
d62a17ae | 1628 | continue; |
1629 | } | |
1630 | } | |
1631 | ||
1632 | /* Redistribute route-map. */ | |
f9120f71 RW |
1633 | if (ripng->redist[rinfo->type].route_map.name) { |
1634 | ret = route_map_apply(ripng->redist[rinfo->type] | |
1635 | .route_map.map, | |
1636 | (struct prefix *)p, | |
1782514f | 1637 | rinfo); |
d62a17ae | 1638 | |
1639 | if (ret == RMAP_DENYMATCH) { | |
1640 | if (IS_RIPNG_DEBUG_PACKET) | |
1641 | zlog_debug( | |
e0259674 DS |
1642 | "RIPng %pFX is filtered by route-map", |
1643 | p); | |
d62a17ae | 1644 | continue; |
1645 | } | |
1646 | } | |
1647 | ||
1648 | /* When the route-map does not set metric. */ | |
1649 | if (!rinfo->metric_set) { | |
1650 | /* If the redistribute metric is set. */ | |
f9120f71 | 1651 | if (ripng->redist[rinfo->type].metric_config |
d62a17ae | 1652 | && rinfo->metric != RIPNG_METRIC_INFINITY) { |
1653 | rinfo->metric_out = | |
f9120f71 | 1654 | ripng->redist[rinfo->type] |
d62a17ae | 1655 | .metric; |
1656 | } else { | |
1657 | /* If the route is not connected or | |
1658 | localy generated | |
1659 | one, use default-metric value */ | |
1660 | if (rinfo->type != ZEBRA_ROUTE_RIPNG | |
1661 | && rinfo->type | |
1662 | != ZEBRA_ROUTE_CONNECT | |
1663 | && rinfo->metric | |
1664 | != RIPNG_METRIC_INFINITY) | |
1665 | rinfo->metric_out = | |
1666 | ripng->default_metric; | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | /* Apply offset-list */ | |
1671 | if (rinfo->metric_out != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 1672 | ripng_offset_list_apply_out(ripng, p, ifp, |
d62a17ae | 1673 | &rinfo->metric_out); |
1674 | ||
1675 | if (rinfo->metric_out > RIPNG_METRIC_INFINITY) | |
1676 | rinfo->metric_out = RIPNG_METRIC_INFINITY; | |
1677 | ||
1678 | /* Perform split-horizon with poisoned reverse | |
1679 | * for RIPng routes. | |
1680 | **/ | |
1681 | if (ri->split_horizon | |
1682 | == RIPNG_SPLIT_HORIZON_POISONED_REVERSE) { | |
1683 | struct ripng_info *tmp_rinfo = NULL; | |
1684 | ||
1685 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
1686 | tmp_rinfo)) | |
1687 | if ((tmp_rinfo->type | |
1688 | == ZEBRA_ROUTE_RIPNG) | |
1689 | && tmp_rinfo->ifindex | |
1690 | == ifp->ifindex) | |
1691 | rinfo->metric_out = | |
1692 | RIPNG_METRIC_INFINITY; | |
1693 | } | |
1694 | ||
1695 | /* Add RTE to the list */ | |
1696 | ripng_rte_add(ripng_rte_list, p, rinfo, NULL); | |
718e3744 | 1697 | } |
a94434b6 | 1698 | |
d62a17ae | 1699 | /* Process the aggregated RTE entry */ |
1700 | if ((aggregate = rp->aggregate) != NULL && aggregate->count > 0 | |
1701 | && aggregate->suppress == 0) { | |
1702 | /* If no route-map are applied, the RTE will be these | |
1703 | * following | |
0437e105 | 1704 | * information. |
d62a17ae | 1705 | */ |
26a3ffd6 | 1706 | p = (struct prefix_ipv6 *)agg_node_get_prefix(rp); |
d62a17ae | 1707 | aggregate->metric_set = 0; |
1708 | aggregate->metric_out = aggregate->metric; | |
1709 | aggregate->tag_out = aggregate->tag; | |
1710 | memset(&aggregate->nexthop_out, 0, | |
1711 | sizeof(aggregate->nexthop_out)); | |
1712 | ||
1713 | /* Apply output filters.*/ | |
1714 | ret = ripng_filter(RIPNG_FILTER_OUT, p, ri); | |
1715 | if (ret < 0) | |
1716 | continue; | |
1717 | ||
1718 | /* Interface route-map */ | |
1719 | if (ri->routemap[RIPNG_FILTER_OUT]) { | |
d62a17ae | 1720 | struct ripng_info newinfo; |
1721 | ||
1722 | /* let's cast the aggregate structure to | |
1723 | * ripng_info */ | |
1724 | memset(&newinfo, 0, sizeof(struct ripng_info)); | |
1725 | /* the nexthop is :: */ | |
1726 | newinfo.metric = aggregate->metric; | |
1727 | newinfo.metric_out = aggregate->metric_out; | |
1728 | newinfo.tag = aggregate->tag; | |
1729 | newinfo.tag_out = aggregate->tag_out; | |
1730 | ||
1731 | ret = route_map_apply( | |
1732 | ri->routemap[RIPNG_FILTER_OUT], | |
1782514f | 1733 | (struct prefix *)p, &newinfo); |
d62a17ae | 1734 | |
1735 | if (ret == RMAP_DENYMATCH) { | |
1736 | if (IS_RIPNG_DEBUG_PACKET) | |
1737 | zlog_debug( | |
e0259674 DS |
1738 | "RIPng %pFX is filtered by route-map out", |
1739 | p); | |
d62a17ae | 1740 | continue; |
1741 | } | |
1742 | ||
1743 | aggregate->metric_out = newinfo.metric_out; | |
1744 | aggregate->tag_out = newinfo.tag_out; | |
1745 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop_out)) | |
1746 | aggregate->nexthop_out = | |
1747 | newinfo.nexthop_out; | |
1748 | } | |
1749 | ||
1750 | /* There is no redistribute routemap for the aggregated | |
1751 | * RTE */ | |
1752 | ||
1753 | /* Changed route only output. */ | |
1754 | /* XXX, vincent, in order to increase time convergence, | |
1755 | * it should be announced if a child has changed. | |
1756 | */ | |
1757 | if (route_type == ripng_changed_route) | |
1758 | continue; | |
1759 | ||
1760 | /* Apply offset-list */ | |
1761 | if (aggregate->metric_out != RIPNG_METRIC_INFINITY) | |
1762 | ripng_offset_list_apply_out( | |
5c84b9a5 | 1763 | ripng, p, ifp, &aggregate->metric_out); |
d62a17ae | 1764 | |
1765 | if (aggregate->metric_out > RIPNG_METRIC_INFINITY) | |
1766 | aggregate->metric_out = RIPNG_METRIC_INFINITY; | |
1767 | ||
1768 | /* Add RTE to the list */ | |
1769 | ripng_rte_add(ripng_rte_list, p, NULL, aggregate); | |
1770 | } | |
718e3744 | 1771 | } |
1772 | ||
d62a17ae | 1773 | /* Flush the list */ |
1774 | ripng_rte_send(ripng_rte_list, ifp, to); | |
1775 | ripng_rte_free(ripng_rte_list); | |
718e3744 | 1776 | } |
1777 | ||
5c84b9a5 RW |
1778 | struct ripng *ripng_lookup_by_vrf_id(vrf_id_t vrf_id) |
1779 | { | |
1780 | struct vrf *vrf; | |
1781 | ||
1782 | vrf = vrf_lookup_by_id(vrf_id); | |
1783 | if (!vrf) | |
1784 | return NULL; | |
1785 | ||
1786 | return vrf->info; | |
1787 | } | |
1788 | ||
dde7b15b RW |
1789 | struct ripng *ripng_lookup_by_vrf_name(const char *vrf_name) |
1790 | { | |
1791 | struct ripng ripng; | |
1792 | ||
1793 | ripng.vrf_name = (char *)vrf_name; | |
1794 | ||
1795 | return RB_FIND(ripng_instance_head, &ripng_instances, &ripng); | |
1796 | } | |
1797 | ||
718e3744 | 1798 | /* Create new RIPng instance and set it to global variable. */ |
dde7b15b | 1799 | struct ripng *ripng_create(const char *vrf_name, struct vrf *vrf, int socket) |
718e3744 | 1800 | { |
5c84b9a5 | 1801 | struct ripng *ripng; |
718e3744 | 1802 | |
d62a17ae | 1803 | /* Allocaste RIPng instance. */ |
1804 | ripng = XCALLOC(MTYPE_RIPNG, sizeof(struct ripng)); | |
dde7b15b | 1805 | ripng->vrf_name = XSTRDUP(MTYPE_RIPNG_VRF_NAME, vrf_name); |
718e3744 | 1806 | |
d62a17ae | 1807 | /* Default version and timer values. */ |
1808 | ripng->version = RIPNG_V1; | |
9a12e9e5 RW |
1809 | ripng->update_time = yang_get_default_uint32( |
1810 | "%s/timers/update-interval", RIPNG_INSTANCE); | |
1811 | ripng->timeout_time = yang_get_default_uint32( | |
1812 | "%s/timers/holddown-interval", RIPNG_INSTANCE); | |
1813 | ripng->garbage_time = yang_get_default_uint32( | |
1814 | "%s/timers/flush-interval", RIPNG_INSTANCE); | |
1815 | ripng->default_metric = | |
1816 | yang_get_default_uint8("%s/default-metric", RIPNG_INSTANCE); | |
1817 | ripng->ecmp = yang_get_default_bool("%s/allow-ecmp", RIPNG_INSTANCE); | |
d62a17ae | 1818 | |
1819 | /* Make buffer. */ | |
1820 | ripng->ibuf = stream_new(RIPNG_MAX_PACKET_SIZE * 5); | |
1821 | ripng->obuf = stream_new(RIPNG_MAX_PACKET_SIZE); | |
1822 | ||
b0ba762f | 1823 | /* Initialize RIPng data structures. */ |
fe08ba7e | 1824 | ripng->table = agg_table_init(); |
5c84b9a5 | 1825 | agg_set_table_info(ripng->table, ripng); |
ecece94c RW |
1826 | ripng->peer_list = list_new(); |
1827 | ripng->peer_list->cmp = (int (*)(void *, void *))ripng_peer_list_cmp; | |
56bf1cb2 | 1828 | ripng->peer_list->del = ripng_peer_list_del; |
b0ba762f | 1829 | ripng->enable_if = vector_init(1); |
29b94d58 | 1830 | ripng->enable_network = agg_table_init(); |
0c32404f | 1831 | ripng->passive_interface = vector_init(1); |
26c6be93 RW |
1832 | ripng->offset_list_master = list_new(); |
1833 | ripng->offset_list_master->cmp = | |
1834 | (int (*)(void *, void *))offset_list_cmp; | |
1835 | ripng->offset_list_master->del = | |
6c4c3561 | 1836 | (void (*)(void *))ripng_offset_list_free; |
dde7b15b | 1837 | ripng->distribute_ctx = distribute_list_ctx_create(vrf); |
03a38493 PG |
1838 | distribute_list_add_hook(ripng->distribute_ctx, |
1839 | ripng_distribute_update); | |
1840 | distribute_list_delete_hook(ripng->distribute_ctx, | |
1841 | ripng_distribute_update); | |
718e3744 | 1842 | |
4b23867c | 1843 | /* if rmap install. */ |
8f88441d | 1844 | ripng->if_rmap_ctx = if_rmap_ctx_create(vrf_name); |
4b23867c PG |
1845 | if_rmap_hook_add(ripng->if_rmap_ctx, ripng_if_rmap_update); |
1846 | if_rmap_hook_delete(ripng->if_rmap_ctx, ripng_if_rmap_update); | |
5c84b9a5 | 1847 | |
dde7b15b RW |
1848 | /* Enable the routing instance if possible. */ |
1849 | if (vrf && vrf_is_enabled(vrf)) | |
1850 | ripng_instance_enable(ripng, vrf, socket); | |
1851 | else { | |
1852 | ripng->vrf = NULL; | |
1853 | ripng->sock = -1; | |
5c84b9a5 RW |
1854 | } |
1855 | ||
dde7b15b RW |
1856 | RB_INSERT(ripng_instance_head, &ripng_instances, ripng); |
1857 | ||
5c84b9a5 | 1858 | return ripng; |
718e3744 | 1859 | } |
1860 | ||
a94434b6 | 1861 | /* Send RIPng request to the interface. */ |
d62a17ae | 1862 | int ripng_request(struct interface *ifp) |
718e3744 | 1863 | { |
d62a17ae | 1864 | struct rte *rte; |
1865 | struct ripng_packet ripng_packet; | |
718e3744 | 1866 | |
d62a17ae | 1867 | /* In default ripd doesn't send RIP_REQUEST to the loopback interface. |
1868 | */ | |
1869 | if (if_is_loopback(ifp)) | |
1870 | return 0; | |
a94434b6 | 1871 | |
d62a17ae | 1872 | /* If interface is down, don't send RIP packet. */ |
1873 | if (!if_is_up(ifp)) | |
1874 | return 0; | |
a94434b6 | 1875 | |
d62a17ae | 1876 | if (IS_RIPNG_DEBUG_EVENT) |
1877 | zlog_debug("RIPng send request to %s", ifp->name); | |
718e3744 | 1878 | |
d62a17ae | 1879 | memset(&ripng_packet, 0, sizeof(ripng_packet)); |
1880 | ripng_packet.command = RIPNG_REQUEST; | |
1881 | ripng_packet.version = RIPNG_V1; | |
1882 | rte = ripng_packet.rte; | |
1883 | rte->metric = RIPNG_METRIC_INFINITY; | |
718e3744 | 1884 | |
d62a17ae | 1885 | return ripng_send_packet((caddr_t)&ripng_packet, sizeof(ripng_packet), |
1886 | NULL, ifp); | |
718e3744 | 1887 | } |
1888 | ||
6b0655a2 | 1889 | |
d62a17ae | 1890 | static int ripng_update_jitter(int time) |
718e3744 | 1891 | { |
5920b3eb | 1892 | return ((frr_weak_random() % (time + 1)) - (time / 2)); |
718e3744 | 1893 | } |
1894 | ||
5c84b9a5 | 1895 | void ripng_event(struct ripng *ripng, enum ripng_event event, int sock) |
718e3744 | 1896 | { |
d62a17ae | 1897 | int jitter = 0; |
718e3744 | 1898 | |
d62a17ae | 1899 | switch (event) { |
1900 | case RIPNG_READ: | |
5c84b9a5 RW |
1901 | thread_add_read(master, ripng_read, ripng, sock, |
1902 | &ripng->t_read); | |
d62a17ae | 1903 | break; |
1904 | case RIPNG_UPDATE_EVENT: | |
69ec2ecb | 1905 | THREAD_OFF(ripng->t_update); |
b3d6bc6e | 1906 | |
d62a17ae | 1907 | /* Update timer jitter. */ |
1908 | jitter = ripng_update_jitter(ripng->update_time); | |
1909 | ||
5c84b9a5 | 1910 | thread_add_timer(master, ripng_update, ripng, |
d62a17ae | 1911 | sock ? 2 : ripng->update_time + jitter, |
1912 | &ripng->t_update); | |
1913 | break; | |
1914 | case RIPNG_TRIGGERED_UPDATE: | |
1915 | if (ripng->t_triggered_interval) | |
1916 | ripng->trigger = 1; | |
1917 | else | |
5c84b9a5 | 1918 | thread_add_event(master, ripng_triggered_update, ripng, |
d62a17ae | 1919 | 0, &ripng->t_triggered_update); |
1920 | break; | |
01e02202 DS |
1921 | case RIPNG_ZEBRA: |
1922 | case RIPNG_REQUEST_EVENT: | |
d62a17ae | 1923 | break; |
1924 | } | |
718e3744 | 1925 | } |
6b0655a2 | 1926 | |
718e3744 | 1927 | |
718e3744 | 1928 | /* Print out routes update time. */ |
d62a17ae | 1929 | static void ripng_vty_out_uptime(struct vty *vty, struct ripng_info *rinfo) |
718e3744 | 1930 | { |
d62a17ae | 1931 | time_t clock; |
a2700b50 | 1932 | struct tm tm; |
718e3744 | 1933 | #define TIME_BUF 25 |
d62a17ae | 1934 | char timebuf[TIME_BUF]; |
1935 | struct thread *thread; | |
1936 | ||
1937 | if ((thread = rinfo->t_timeout) != NULL) { | |
1938 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
1939 | gmtime_r(&clock, &tm); |
1940 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 1941 | vty_out(vty, "%5s", timebuf); |
1942 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
1943 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
1944 | gmtime_r(&clock, &tm); |
1945 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 1946 | vty_out(vty, "%5s", timebuf); |
1947 | } | |
718e3744 | 1948 | } |
1949 | ||
d62a17ae | 1950 | static char *ripng_route_subtype_print(struct ripng_info *rinfo) |
1951 | { | |
1952 | static char str[3]; | |
1953 | memset(str, 0, 3); | |
1954 | ||
1955 | if (rinfo->suppress) | |
9736ba9e | 1956 | strlcat(str, "S", sizeof(str)); |
d62a17ae | 1957 | |
1958 | switch (rinfo->sub_type) { | |
1959 | case RIPNG_ROUTE_RTE: | |
9736ba9e | 1960 | strlcat(str, "n", sizeof(str)); |
d62a17ae | 1961 | break; |
1962 | case RIPNG_ROUTE_STATIC: | |
9736ba9e | 1963 | strlcat(str, "s", sizeof(str)); |
d62a17ae | 1964 | break; |
1965 | case RIPNG_ROUTE_DEFAULT: | |
9736ba9e | 1966 | strlcat(str, "d", sizeof(str)); |
d62a17ae | 1967 | break; |
1968 | case RIPNG_ROUTE_REDISTRIBUTE: | |
9736ba9e | 1969 | strlcat(str, "r", sizeof(str)); |
d62a17ae | 1970 | break; |
1971 | case RIPNG_ROUTE_INTERFACE: | |
9736ba9e | 1972 | strlcat(str, "i", sizeof(str)); |
d62a17ae | 1973 | break; |
1974 | default: | |
9736ba9e | 1975 | strlcat(str, "?", sizeof(str)); |
d62a17ae | 1976 | break; |
1977 | } | |
a94434b6 | 1978 | |
d62a17ae | 1979 | return str; |
a94434b6 | 1980 | } |
1981 | ||
718e3744 | 1982 | DEFUN (show_ipv6_ripng, |
1983 | show_ipv6_ripng_cmd, | |
dde7b15b | 1984 | "show ipv6 ripng [vrf NAME]", |
718e3744 | 1985 | SHOW_STR |
8d0f15fd | 1986 | IPV6_STR |
dde7b15b RW |
1987 | "Show RIPng routes\n" |
1988 | VRF_CMD_HELP_STR) | |
718e3744 | 1989 | { |
5c84b9a5 | 1990 | struct ripng *ripng; |
fe08ba7e | 1991 | struct agg_node *rp; |
d62a17ae | 1992 | struct ripng_info *rinfo; |
1993 | struct ripng_aggregate *aggregate; | |
d62a17ae | 1994 | struct list *list = NULL; |
1995 | struct listnode *listnode = NULL; | |
1996 | int len; | |
dde7b15b RW |
1997 | const char *vrf_name; |
1998 | int idx = 0; | |
d62a17ae | 1999 | |
dde7b15b RW |
2000 | if (argv_find(argv, argc, "vrf", &idx)) |
2001 | vrf_name = argv[idx + 1]->arg; | |
2002 | else | |
2003 | vrf_name = VRF_DEFAULT_NAME; | |
2004 | ||
2005 | ripng = ripng_lookup_by_vrf_name(vrf_name); | |
2006 | if (!ripng) { | |
2007 | vty_out(vty, "%% RIPng instance not found\n"); | |
2008 | return CMD_SUCCESS; | |
2009 | } | |
2010 | if (!ripng->enabled) { | |
2011 | vty_out(vty, "%% RIPng instance is disabled\n"); | |
d62a17ae | 2012 | return CMD_SUCCESS; |
dde7b15b | 2013 | } |
d62a17ae | 2014 | |
2015 | /* Header of display. */ | |
2016 | vty_out(vty, | |
2017 | "Codes: R - RIPng, C - connected, S - Static, O - OSPF, B - BGP\n" | |
2018 | "Sub-codes:\n" | |
2019 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
2020 | " (i) - interface, (a/S) - aggregated/Suppressed\n\n" | |
2021 | " Network Next Hop Via Metric Tag Time\n"); | |
2022 | ||
fe08ba7e | 2023 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { |
d62a17ae | 2024 | if ((aggregate = rp->aggregate) != NULL) { |
718e3744 | 2025 | #ifdef DEBUG |
26a3ffd6 DS |
2026 | vty_out(vty, "R(a) %d/%d %pRN ", aggregate->count, |
2027 | aggregate->suppress, rp); | |
718e3744 | 2028 | #else |
26a3ffd6 | 2029 | vty_out(vty, "R(a) %pRN ", rp); |
718e3744 | 2030 | #endif /* DEBUG */ |
d62a17ae | 2031 | vty_out(vty, "\n"); |
2032 | vty_out(vty, "%*s", 18, " "); | |
718e3744 | 2033 | |
d62a17ae | 2034 | vty_out(vty, "%*s", 28, " "); |
2035 | vty_out(vty, "self %2d %3" ROUTE_TAG_PRI "\n", | |
2036 | aggregate->metric, (route_tag_t)aggregate->tag); | |
2037 | } | |
718e3744 | 2038 | |
d62a17ae | 2039 | if ((list = rp->info) != NULL) |
2040 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
718e3744 | 2041 | #ifdef DEBUG |
26a3ffd6 | 2042 | vty_out(vty, "%c(%s) 0/%d %pRN ", |
d62a17ae | 2043 | zebra_route_char(rinfo->type), |
2044 | ripng_route_subtype_print(rinfo), | |
26a3ffd6 | 2045 | rinfo->suppress, rp); |
718e3744 | 2046 | #else |
26a3ffd6 | 2047 | vty_out(vty, "%c(%s) %pRN ", |
d62a17ae | 2048 | zebra_route_char(rinfo->type), |
26a3ffd6 | 2049 | ripng_route_subtype_print(rinfo), rp); |
718e3744 | 2050 | #endif /* DEBUG */ |
d62a17ae | 2051 | vty_out(vty, "\n"); |
2052 | vty_out(vty, "%*s", 18, " "); | |
2e5b3f37 MS |
2053 | len = vty_out(vty, "%pI6", |
2054 | &rinfo->nexthop); | |
d62a17ae | 2055 | |
2056 | len = 28 - len; | |
2057 | if (len > 0) | |
51f7fe84 | 2058 | vty_out(vty, "%*s", len, " "); |
d62a17ae | 2059 | |
2060 | /* from */ | |
2061 | if ((rinfo->type == ZEBRA_ROUTE_RIPNG) | |
2062 | && (rinfo->sub_type == RIPNG_ROUTE_RTE)) { | |
2063 | len = vty_out( | |
2064 | vty, "%s", | |
dde7b15b RW |
2065 | ifindex2ifname( |
2066 | rinfo->ifindex, | |
2067 | ripng->vrf->vrf_id)); | |
d62a17ae | 2068 | } else if (rinfo->metric |
2069 | == RIPNG_METRIC_INFINITY) { | |
2070 | len = vty_out(vty, "kill"); | |
2071 | } else | |
2072 | len = vty_out(vty, "self"); | |
2073 | ||
2074 | len = 9 - len; | |
2075 | if (len > 0) | |
2076 | vty_out(vty, "%*s", len, " "); | |
2077 | ||
2078 | vty_out(vty, " %2d %3" ROUTE_TAG_PRI " ", | |
2079 | rinfo->metric, (route_tag_t)rinfo->tag); | |
2080 | ||
2081 | /* time */ | |
2082 | if ((rinfo->type == ZEBRA_ROUTE_RIPNG) | |
2083 | && (rinfo->sub_type == RIPNG_ROUTE_RTE)) { | |
2084 | /* RTE from remote RIP routers */ | |
2085 | ripng_vty_out_uptime(vty, rinfo); | |
2086 | } else if (rinfo->metric | |
2087 | == RIPNG_METRIC_INFINITY) { | |
2088 | /* poisonous reversed routes (gc) */ | |
2089 | ripng_vty_out_uptime(vty, rinfo); | |
2090 | } | |
2091 | ||
2092 | vty_out(vty, "\n"); | |
2093 | } | |
718e3744 | 2094 | } |
718e3744 | 2095 | |
d62a17ae | 2096 | return CMD_SUCCESS; |
718e3744 | 2097 | } |
2098 | ||
a94434b6 | 2099 | DEFUN (show_ipv6_ripng_status, |
2100 | show_ipv6_ripng_status_cmd, | |
dde7b15b | 2101 | "show ipv6 ripng [vrf NAME] status", |
a94434b6 | 2102 | SHOW_STR |
8d0f15fd | 2103 | IPV6_STR |
a94434b6 | 2104 | "Show RIPng routes\n" |
dde7b15b | 2105 | VRF_CMD_HELP_STR |
a94434b6 | 2106 | "IPv6 routing protocol process parameters and statistics\n") |
2107 | { | |
5c84b9a5 | 2108 | struct ripng *ripng; |
d62a17ae | 2109 | struct interface *ifp; |
dde7b15b RW |
2110 | const char *vrf_name; |
2111 | int idx = 0; | |
a94434b6 | 2112 | |
dde7b15b RW |
2113 | if (argv_find(argv, argc, "vrf", &idx)) |
2114 | vrf_name = argv[idx + 1]->arg; | |
2115 | else | |
2116 | vrf_name = VRF_DEFAULT_NAME; | |
2117 | ||
2118 | ripng = ripng_lookup_by_vrf_name(vrf_name); | |
2119 | if (!ripng) { | |
2120 | vty_out(vty, "%% RIPng instance not found\n"); | |
2121 | return CMD_SUCCESS; | |
2122 | } | |
2123 | if (!ripng->enabled) { | |
2124 | vty_out(vty, "%% RIPng instance is disabled\n"); | |
d62a17ae | 2125 | return CMD_SUCCESS; |
dde7b15b | 2126 | } |
a94434b6 | 2127 | |
d62a17ae | 2128 | vty_out(vty, "Routing Protocol is \"RIPng\"\n"); |
f8981ec5 | 2129 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 2130 | ripng->update_time); |
2131 | vty_out(vty, " next due in %lu seconds\n", | |
2132 | thread_timer_remain_second(ripng->t_update)); | |
f8981ec5 RW |
2133 | vty_out(vty, " Timeout after %u seconds,", ripng->timeout_time); |
2134 | vty_out(vty, " garbage collect after %u seconds\n", | |
d62a17ae | 2135 | ripng->garbage_time); |
a94434b6 | 2136 | |
d62a17ae | 2137 | /* Filtering status show. */ |
03a38493 | 2138 | config_show_distribute(vty, ripng->distribute_ctx); |
a94434b6 | 2139 | |
d62a17ae | 2140 | /* Default metric information. */ |
2141 | vty_out(vty, " Default redistribution metric is %d\n", | |
2142 | ripng->default_metric); | |
a94434b6 | 2143 | |
d62a17ae | 2144 | /* Redistribute information. */ |
2145 | vty_out(vty, " Redistributing:"); | |
5c84b9a5 | 2146 | ripng_redistribute_write(vty, ripng); |
d62a17ae | 2147 | vty_out(vty, "\n"); |
a94434b6 | 2148 | |
d62a17ae | 2149 | vty_out(vty, " Default version control: send version %d,", |
2150 | ripng->version); | |
2151 | vty_out(vty, " receive version %d \n", ripng->version); | |
a94434b6 | 2152 | |
d62a17ae | 2153 | vty_out(vty, " Interface Send Recv\n"); |
a94434b6 | 2154 | |
dde7b15b | 2155 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 2156 | struct ripng_interface *ri; |
2157 | ||
2158 | ri = ifp->info; | |
a94434b6 | 2159 | |
d62a17ae | 2160 | if (ri->enable_network || ri->enable_interface) { |
a94434b6 | 2161 | |
d62a17ae | 2162 | vty_out(vty, " %-17s%-3d %-3d\n", ifp->name, |
2163 | ripng->version, ripng->version); | |
2164 | } | |
a94434b6 | 2165 | } |
a94434b6 | 2166 | |
d62a17ae | 2167 | vty_out(vty, " Routing for Networks:\n"); |
5c84b9a5 | 2168 | ripng_network_write(vty, ripng); |
a94434b6 | 2169 | |
d62a17ae | 2170 | vty_out(vty, " Routing Information Sources:\n"); |
2171 | vty_out(vty, | |
2172 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
5c84b9a5 | 2173 | ripng_peer_display(vty, ripng); |
a94434b6 | 2174 | |
d62a17ae | 2175 | return CMD_SUCCESS; |
a94434b6 | 2176 | } |
2177 | ||
fac76f9c | 2178 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
5c84b9a5 | 2179 | void ripng_ecmp_disable(struct ripng *ripng) |
d62a17ae | 2180 | { |
fe08ba7e | 2181 | struct agg_node *rp; |
d62a17ae | 2182 | struct ripng_info *rinfo, *tmp_rinfo; |
2183 | struct list *list; | |
2184 | struct listnode *node, *nextnode; | |
2185 | ||
2186 | if (!ripng) | |
2187 | return; | |
2188 | ||
fe08ba7e | 2189 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 2190 | if ((list = rp->info) != NULL && listcount(list) > 1) { |
2191 | rinfo = listgetdata(listhead(list)); | |
2192 | if (!ripng_route_rte(rinfo)) | |
2193 | continue; | |
2194 | ||
2195 | /* Drop all other entries, except the first one. */ | |
2196 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
2197 | if (tmp_rinfo != rinfo) { | |
546c8d78 DS |
2198 | THREAD_OFF(tmp_rinfo->t_timeout); |
2199 | THREAD_OFF( | |
d62a17ae | 2200 | tmp_rinfo->t_garbage_collect); |
2201 | list_delete_node(list, node); | |
2202 | ripng_info_free(tmp_rinfo); | |
2203 | } | |
2204 | ||
2205 | /* Update zebra. */ | |
5c84b9a5 | 2206 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 2207 | |
2208 | /* Set the route change flag. */ | |
2209 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
2210 | ||
2211 | /* Signal the output process to trigger an update. */ | |
5c84b9a5 | 2212 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 2213 | } |
fac76f9c FL |
2214 | } |
2215 | ||
718e3744 | 2216 | /* RIPng configuration write function. */ |
d62a17ae | 2217 | static int ripng_config_write(struct vty *vty) |
2218 | { | |
dde7b15b | 2219 | struct ripng *ripng; |
d62a17ae | 2220 | int write = 0; |
d62a17ae | 2221 | |
dde7b15b RW |
2222 | RB_FOREACH(ripng, ripng_instance_head, &ripng_instances) { |
2223 | char xpath[XPATH_MAXLEN]; | |
2224 | struct lyd_node *dnode; | |
2225 | ||
2226 | snprintf(xpath, sizeof(xpath), | |
2227 | "/frr-ripngd:ripngd/instance[vrf='%s']", | |
2228 | ripng->vrf_name); | |
2229 | ||
2230 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
2231 | assert(dnode); | |
d62a17ae | 2232 | |
5c84b9a5 | 2233 | nb_cli_show_dnode_cmds(vty, dnode, false); |
718e3744 | 2234 | |
dde7b15b | 2235 | config_write_distribute(vty, ripng->distribute_ctx); |
4b23867c | 2236 | config_write_if_rmap(vty, ripng->if_rmap_ctx); |
718e3744 | 2237 | |
07679ad9 IR |
2238 | vty_out(vty, "exit\n"); |
2239 | ||
9a12e9e5 | 2240 | write = 1; |
d62a17ae | 2241 | } |
9a12e9e5 | 2242 | |
d62a17ae | 2243 | return write; |
718e3744 | 2244 | } |
2245 | ||
612c2c15 | 2246 | static int ripng_config_write(struct vty *vty); |
718e3744 | 2247 | /* RIPng node structure. */ |
d62a17ae | 2248 | static struct cmd_node cmd_ripng_node = { |
f4b8291f | 2249 | .name = "ripng", |
62b346ee | 2250 | .node = RIPNG_NODE, |
24389580 | 2251 | .parent_node = CONFIG_NODE, |
62b346ee | 2252 | .prompt = "%s(config-router)# ", |
612c2c15 | 2253 | .config_write = ripng_config_write, |
718e3744 | 2254 | }; |
2255 | ||
03a38493 PG |
2256 | static void ripng_distribute_update(struct distribute_ctx *ctx, |
2257 | struct distribute *dist) | |
d62a17ae | 2258 | { |
2259 | struct interface *ifp; | |
2260 | struct ripng_interface *ri; | |
2261 | struct access_list *alist; | |
2262 | struct prefix_list *plist; | |
2263 | ||
dde7b15b | 2264 | if (!ctx->vrf || !dist->ifname) |
d62a17ae | 2265 | return; |
2266 | ||
a36898e7 | 2267 | ifp = if_lookup_by_name(dist->ifname, ctx->vrf->vrf_id); |
d62a17ae | 2268 | if (ifp == NULL) |
2269 | return; | |
2270 | ||
2271 | ri = ifp->info; | |
2272 | ||
2273 | if (dist->list[DISTRIBUTE_V6_IN]) { | |
2274 | alist = access_list_lookup(AFI_IP6, | |
2275 | dist->list[DISTRIBUTE_V6_IN]); | |
2276 | if (alist) | |
2277 | ri->list[RIPNG_FILTER_IN] = alist; | |
2278 | else | |
2279 | ri->list[RIPNG_FILTER_IN] = NULL; | |
2280 | } else | |
2281 | ri->list[RIPNG_FILTER_IN] = NULL; | |
2282 | ||
2283 | if (dist->list[DISTRIBUTE_V6_OUT]) { | |
2284 | alist = access_list_lookup(AFI_IP6, | |
2285 | dist->list[DISTRIBUTE_V6_OUT]); | |
2286 | if (alist) | |
2287 | ri->list[RIPNG_FILTER_OUT] = alist; | |
2288 | else | |
2289 | ri->list[RIPNG_FILTER_OUT] = NULL; | |
2290 | } else | |
2291 | ri->list[RIPNG_FILTER_OUT] = NULL; | |
2292 | ||
2293 | if (dist->prefix[DISTRIBUTE_V6_IN]) { | |
2294 | plist = prefix_list_lookup(AFI_IP6, | |
2295 | dist->prefix[DISTRIBUTE_V6_IN]); | |
2296 | if (plist) | |
2297 | ri->prefix[RIPNG_FILTER_IN] = plist; | |
2298 | else | |
2299 | ri->prefix[RIPNG_FILTER_IN] = NULL; | |
2300 | } else | |
2301 | ri->prefix[RIPNG_FILTER_IN] = NULL; | |
2302 | ||
2303 | if (dist->prefix[DISTRIBUTE_V6_OUT]) { | |
2304 | plist = prefix_list_lookup(AFI_IP6, | |
2305 | dist->prefix[DISTRIBUTE_V6_OUT]); | |
2306 | if (plist) | |
2307 | ri->prefix[RIPNG_FILTER_OUT] = plist; | |
2308 | else | |
2309 | ri->prefix[RIPNG_FILTER_OUT] = NULL; | |
2310 | } else | |
2311 | ri->prefix[RIPNG_FILTER_OUT] = NULL; | |
2312 | } | |
2313 | ||
2314 | void ripng_distribute_update_interface(struct interface *ifp) | |
2315 | { | |
dde7b15b RW |
2316 | struct ripng_interface *ri = ifp->info; |
2317 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 2318 | struct distribute *dist; |
2319 | ||
03a38493 PG |
2320 | if (!ripng) |
2321 | return; | |
2322 | dist = distribute_lookup(ripng->distribute_ctx, ifp->name); | |
d62a17ae | 2323 | if (dist) |
03a38493 | 2324 | ripng_distribute_update(ripng->distribute_ctx, dist); |
718e3744 | 2325 | } |
2326 | ||
2327 | /* Update all interface's distribute list. */ | |
d62a17ae | 2328 | static void ripng_distribute_update_all(struct prefix_list *notused) |
718e3744 | 2329 | { |
f4e14fdb | 2330 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 2331 | struct interface *ifp; |
718e3744 | 2332 | |
451fda4f | 2333 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 2334 | ripng_distribute_update_interface(ifp); |
718e3744 | 2335 | } |
c9e52be3 | 2336 | |
d62a17ae | 2337 | static void ripng_distribute_update_all_wrapper(struct access_list *notused) |
c9e52be3 | 2338 | { |
d62a17ae | 2339 | ripng_distribute_update_all(NULL); |
c9e52be3 | 2340 | } |
6b0655a2 | 2341 | |
a94434b6 | 2342 | /* delete all the added ripng routes. */ |
5c84b9a5 | 2343 | void ripng_clean(struct ripng *ripng) |
d62a17ae | 2344 | { |
eb6b3885 IR |
2345 | ripng_interface_clean(ripng); |
2346 | ||
dde7b15b RW |
2347 | if (ripng->enabled) |
2348 | ripng_instance_disable(ripng); | |
a9caf6e9 RW |
2349 | |
2350 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
f9120f71 RW |
2351 | if (ripng->redist[i].route_map.name) |
2352 | free(ripng->redist[i].route_map.name); | |
a94434b6 | 2353 | |
a9caf6e9 | 2354 | agg_table_finish(ripng->table); |
56bf1cb2 | 2355 | list_delete(&ripng->peer_list); |
a9caf6e9 | 2356 | distribute_list_delete(&ripng->distribute_ctx); |
8f88441d | 2357 | if_rmap_ctx_delete(ripng->if_rmap_ctx); |
0581e54d | 2358 | |
a9caf6e9 RW |
2359 | stream_free(ripng->ibuf); |
2360 | stream_free(ripng->obuf); | |
a94434b6 | 2361 | |
5c84b9a5 RW |
2362 | ripng_clean_network(ripng); |
2363 | ripng_passive_interface_clean(ripng); | |
b0ba762f | 2364 | vector_free(ripng->enable_if); |
29b94d58 | 2365 | agg_table_finish(ripng->enable_network); |
0c32404f | 2366 | vector_free(ripng->passive_interface); |
26c6be93 | 2367 | list_delete(&ripng->offset_list_master); |
5c84b9a5 | 2368 | |
dde7b15b RW |
2369 | RB_REMOVE(ripng_instance_head, &ripng_instances, ripng); |
2370 | XFREE(MTYPE_RIPNG_VRF_NAME, ripng->vrf_name); | |
a9caf6e9 | 2371 | XFREE(MTYPE_RIPNG, ripng); |
a94434b6 | 2372 | } |
2373 | ||
4b23867c PG |
2374 | static void ripng_if_rmap_update(struct if_rmap_ctx *ctx, |
2375 | struct if_rmap *if_rmap) | |
718e3744 | 2376 | { |
aec0d756 | 2377 | struct interface *ifp = NULL; |
d62a17ae | 2378 | struct ripng_interface *ri; |
2379 | struct route_map *rmap; | |
aec0d756 | 2380 | struct vrf *vrf = NULL; |
718e3744 | 2381 | |
aec0d756 PG |
2382 | if (ctx->name) |
2383 | vrf = vrf_lookup_by_name(ctx->name); | |
2384 | if (vrf) | |
a36898e7 | 2385 | ifp = if_lookup_by_name(if_rmap->ifname, vrf->vrf_id); |
d62a17ae | 2386 | if (ifp == NULL) |
2387 | return; | |
718e3744 | 2388 | |
d62a17ae | 2389 | ri = ifp->info; |
718e3744 | 2390 | |
d62a17ae | 2391 | if (if_rmap->routemap[IF_RMAP_IN]) { |
2392 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
2393 | if (rmap) | |
2394 | ri->routemap[IF_RMAP_IN] = rmap; | |
2395 | else | |
2396 | ri->routemap[IF_RMAP_IN] = NULL; | |
2397 | } else | |
2398 | ri->routemap[RIPNG_FILTER_IN] = NULL; | |
718e3744 | 2399 | |
d62a17ae | 2400 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
2401 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
2402 | if (rmap) | |
2403 | ri->routemap[IF_RMAP_OUT] = rmap; | |
2404 | else | |
2405 | ri->routemap[IF_RMAP_OUT] = NULL; | |
2406 | } else | |
2407 | ri->routemap[RIPNG_FILTER_OUT] = NULL; | |
718e3744 | 2408 | } |
2409 | ||
d62a17ae | 2410 | void ripng_if_rmap_update_interface(struct interface *ifp) |
718e3744 | 2411 | { |
8f88441d RW |
2412 | struct ripng_interface *ri = ifp->info; |
2413 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 2414 | struct if_rmap *if_rmap; |
4b23867c | 2415 | struct if_rmap_ctx *ctx; |
718e3744 | 2416 | |
4b23867c PG |
2417 | if (!ripng) |
2418 | return; | |
2419 | ctx = ripng->if_rmap_ctx; | |
2420 | if (!ctx) | |
2421 | return; | |
2422 | if_rmap = if_rmap_lookup(ctx, ifp->name); | |
d62a17ae | 2423 | if (if_rmap) |
4b23867c | 2424 | ripng_if_rmap_update(ctx, if_rmap); |
718e3744 | 2425 | } |
2426 | ||
5c84b9a5 | 2427 | static void ripng_routemap_update_redistribute(struct ripng *ripng) |
718e3744 | 2428 | { |
5c84b9a5 | 2429 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
8f88441d | 2430 | if (ripng->redist[i].route_map.name) { |
f9120f71 RW |
2431 | ripng->redist[i].route_map.map = |
2432 | route_map_lookup_by_name( | |
2433 | ripng->redist[i].route_map.name); | |
8f88441d RW |
2434 | route_map_counter_increment( |
2435 | ripng->redist[i].route_map.map); | |
d62a17ae | 2436 | } |
718e3744 | 2437 | } |
718e3744 | 2438 | } |
2439 | ||
d62a17ae | 2440 | static void ripng_routemap_update(const char *unused) |
718e3744 | 2441 | { |
f4e14fdb | 2442 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
5c84b9a5 | 2443 | struct ripng *ripng; |
d62a17ae | 2444 | struct interface *ifp; |
718e3744 | 2445 | |
451fda4f | 2446 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 2447 | ripng_if_rmap_update_interface(ifp); |
718e3744 | 2448 | |
5c84b9a5 RW |
2449 | ripng = vrf->info; |
2450 | if (ripng) | |
2451 | ripng_routemap_update_redistribute(ripng); | |
718e3744 | 2452 | } |
2453 | ||
dde7b15b RW |
2454 | /* Link RIPng instance to VRF. */ |
2455 | static void ripng_vrf_link(struct ripng *ripng, struct vrf *vrf) | |
2456 | { | |
2457 | struct interface *ifp; | |
2458 | ||
2459 | ripng->vrf = vrf; | |
2460 | ripng->distribute_ctx->vrf = vrf; | |
2461 | vrf->info = ripng; | |
2462 | ||
2463 | FOR_ALL_INTERFACES (vrf, ifp) | |
2464 | ripng_interface_sync(ifp); | |
2465 | } | |
2466 | ||
2467 | /* Unlink RIPng instance from VRF. */ | |
2468 | static void ripng_vrf_unlink(struct ripng *ripng, struct vrf *vrf) | |
2469 | { | |
2470 | struct interface *ifp; | |
2471 | ||
2472 | ripng->vrf = NULL; | |
2473 | ripng->distribute_ctx->vrf = NULL; | |
2474 | vrf->info = NULL; | |
2475 | ||
2476 | FOR_ALL_INTERFACES (vrf, ifp) | |
2477 | ripng_interface_sync(ifp); | |
2478 | } | |
2479 | ||
2480 | static void ripng_instance_enable(struct ripng *ripng, struct vrf *vrf, | |
2481 | int sock) | |
2482 | { | |
2483 | ripng->sock = sock; | |
2484 | ||
2485 | ripng_vrf_link(ripng, vrf); | |
2486 | ripng->enabled = true; | |
2487 | ||
f9120f71 RW |
2488 | /* Resend all redistribute requests. */ |
2489 | ripng_redistribute_enable(ripng); | |
2490 | ||
dde7b15b RW |
2491 | /* Create read and timer thread. */ |
2492 | ripng_event(ripng, RIPNG_READ, ripng->sock); | |
2493 | ripng_event(ripng, RIPNG_UPDATE_EVENT, 1); | |
2494 | ||
2495 | ripng_zebra_vrf_register(vrf); | |
2496 | } | |
2497 | ||
2498 | static void ripng_instance_disable(struct ripng *ripng) | |
2499 | { | |
2500 | struct vrf *vrf = ripng->vrf; | |
2501 | struct agg_node *rp; | |
2502 | ||
2503 | /* Clear RIPng routes */ | |
2504 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { | |
2505 | struct ripng_aggregate *aggregate; | |
2506 | struct list *list; | |
2507 | ||
2508 | if ((list = rp->info) != NULL) { | |
2509 | struct ripng_info *rinfo; | |
2510 | struct listnode *listnode; | |
2511 | ||
2512 | rinfo = listgetdata(listhead(list)); | |
2513 | if (ripng_route_rte(rinfo)) | |
2514 | ripng_zebra_ipv6_delete(ripng, rp); | |
2515 | ||
2516 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
546c8d78 DS |
2517 | THREAD_OFF(rinfo->t_timeout); |
2518 | THREAD_OFF(rinfo->t_garbage_collect); | |
dde7b15b RW |
2519 | ripng_info_free(rinfo); |
2520 | } | |
2521 | list_delete(&list); | |
2522 | rp->info = NULL; | |
2523 | agg_unlock_node(rp); | |
2524 | } | |
2525 | ||
2526 | if ((aggregate = rp->aggregate) != NULL) { | |
2527 | ripng_aggregate_free(aggregate); | |
2528 | rp->aggregate = NULL; | |
2529 | agg_unlock_node(rp); | |
2530 | } | |
2531 | } | |
2532 | ||
f9120f71 RW |
2533 | /* Flush all redistribute requests. */ |
2534 | ripng_redistribute_disable(ripng); | |
2535 | ||
dde7b15b | 2536 | /* Cancel the RIPng timers */ |
546c8d78 DS |
2537 | THREAD_OFF(ripng->t_update); |
2538 | THREAD_OFF(ripng->t_triggered_update); | |
2539 | THREAD_OFF(ripng->t_triggered_interval); | |
dde7b15b RW |
2540 | |
2541 | /* Cancel the read thread */ | |
69ec2ecb | 2542 | THREAD_OFF(ripng->t_read); |
dde7b15b RW |
2543 | |
2544 | /* Close the RIPng socket */ | |
2545 | if (ripng->sock >= 0) { | |
2546 | close(ripng->sock); | |
2547 | ripng->sock = -1; | |
2548 | } | |
2549 | ||
2550 | /* Clear existing peers. */ | |
2551 | list_delete_all_node(ripng->peer_list); | |
2552 | ||
2553 | ripng_zebra_vrf_deregister(vrf); | |
2554 | ||
2555 | ripng_vrf_unlink(ripng, vrf); | |
2556 | ripng->enabled = false; | |
2557 | } | |
2558 | ||
2559 | static int ripng_vrf_new(struct vrf *vrf) | |
2560 | { | |
2561 | if (IS_RIPNG_DEBUG_EVENT) | |
2562 | zlog_debug("%s: VRF created: %s(%u)", __func__, vrf->name, | |
2563 | vrf->vrf_id); | |
2564 | ||
2565 | return 0; | |
2566 | } | |
2567 | ||
2568 | static int ripng_vrf_delete(struct vrf *vrf) | |
2569 | { | |
b1d29673 DS |
2570 | struct ripng *ripng; |
2571 | ||
dde7b15b RW |
2572 | if (IS_RIPNG_DEBUG_EVENT) |
2573 | zlog_debug("%s: VRF deleted: %s(%u)", __func__, vrf->name, | |
2574 | vrf->vrf_id); | |
2575 | ||
b1d29673 DS |
2576 | ripng = ripng_lookup_by_vrf_name(vrf->name); |
2577 | if (!ripng) | |
2578 | return 0; | |
2579 | ||
2580 | ripng_clean(ripng); | |
dde7b15b RW |
2581 | return 0; |
2582 | } | |
2583 | ||
2584 | static int ripng_vrf_enable(struct vrf *vrf) | |
2585 | { | |
2586 | struct ripng *ripng; | |
2587 | int socket; | |
2588 | ||
2589 | ripng = ripng_lookup_by_vrf_name(vrf->name); | |
ac2cb9bf | 2590 | if (!ripng || ripng->enabled) |
dde7b15b RW |
2591 | return 0; |
2592 | ||
2593 | if (IS_RIPNG_DEBUG_EVENT) | |
2594 | zlog_debug("%s: VRF %s(%u) enabled", __func__, vrf->name, | |
2595 | vrf->vrf_id); | |
2596 | ||
2597 | /* Activate the VRF RIPng instance. */ | |
be2bad2e PG |
2598 | socket = ripng_make_socket(vrf); |
2599 | if (socket < 0) | |
2600 | return -1; | |
dde7b15b | 2601 | |
be2bad2e | 2602 | ripng_instance_enable(ripng, vrf, socket); |
dde7b15b RW |
2603 | |
2604 | return 0; | |
2605 | } | |
2606 | ||
2607 | static int ripng_vrf_disable(struct vrf *vrf) | |
2608 | { | |
2609 | struct ripng *ripng; | |
2610 | ||
2611 | ripng = ripng_lookup_by_vrf_name(vrf->name); | |
2612 | if (!ripng || !ripng->enabled) | |
2613 | return 0; | |
2614 | ||
2615 | if (IS_RIPNG_DEBUG_EVENT) | |
2616 | zlog_debug("%s: VRF %s(%u) disabled", __func__, vrf->name, | |
2617 | vrf->vrf_id); | |
2618 | ||
2619 | /* Deactivate the VRF RIPng instance. */ | |
2620 | if (ripng->enabled) | |
2621 | ripng_instance_disable(ripng); | |
2622 | ||
2623 | return 0; | |
2624 | } | |
2625 | ||
2626 | void ripng_vrf_init(void) | |
2627 | { | |
2628 | vrf_init(ripng_vrf_new, ripng_vrf_enable, ripng_vrf_disable, | |
ac2cb9bf | 2629 | ripng_vrf_delete); |
f5eef2d5 | 2630 | |
cfc369c4 | 2631 | vrf_cmd_init(NULL); |
dde7b15b RW |
2632 | } |
2633 | ||
2634 | void ripng_vrf_terminate(void) | |
2635 | { | |
2636 | vrf_terminate(); | |
2637 | } | |
2638 | ||
718e3744 | 2639 | /* Initialize ripng structure and set commands. */ |
4d762f26 | 2640 | void ripng_init(void) |
718e3744 | 2641 | { |
d62a17ae | 2642 | /* Install RIPNG_NODE. */ |
612c2c15 | 2643 | install_node(&cmd_ripng_node); |
718e3744 | 2644 | |
d62a17ae | 2645 | /* Install ripng commands. */ |
2646 | install_element(VIEW_NODE, &show_ipv6_ripng_cmd); | |
2647 | install_element(VIEW_NODE, &show_ipv6_ripng_status_cmd); | |
718e3744 | 2648 | |
d62a17ae | 2649 | install_default(RIPNG_NODE); |
718e3744 | 2650 | |
d62a17ae | 2651 | ripng_if_init(); |
2652 | ripng_debug_init(); | |
718e3744 | 2653 | |
d62a17ae | 2654 | /* Access list install. */ |
2655 | access_list_init(); | |
2656 | access_list_add_hook(ripng_distribute_update_all_wrapper); | |
2657 | access_list_delete_hook(ripng_distribute_update_all_wrapper); | |
718e3744 | 2658 | |
d62a17ae | 2659 | /* Prefix list initialize.*/ |
2660 | prefix_list_init(); | |
2661 | prefix_list_add_hook(ripng_distribute_update_all); | |
2662 | prefix_list_delete_hook(ripng_distribute_update_all); | |
718e3744 | 2663 | |
d62a17ae | 2664 | /* Route-map for interface. */ |
2665 | ripng_route_map_init(); | |
a94434b6 | 2666 | |
d62a17ae | 2667 | route_map_add_hook(ripng_routemap_update); |
2668 | route_map_delete_hook(ripng_routemap_update); | |
718e3744 | 2669 | |
d62a17ae | 2670 | if_rmap_init(RIPNG_NODE); |
718e3744 | 2671 | } |