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718e3744 | 1 | /* RIPng daemon |
2 | * Copyright (C) 1998, 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
718e3744 | 23 | #include "prefix.h" |
24 | #include "filter.h" | |
25 | #include "log.h" | |
26 | #include "thread.h" | |
27 | #include "memory.h" | |
28 | #include "if.h" | |
29 | #include "stream.h" | |
fe08ba7e | 30 | #include "agg_table.h" |
718e3744 | 31 | #include "command.h" |
32 | #include "sockopt.h" | |
33 | #include "distribute.h" | |
34 | #include "plist.h" | |
35 | #include "routemap.h" | |
0750d21f | 36 | #include "if_rmap.h" |
27d47aa7 | 37 | #include "privs.h" |
7f9a4fd7 | 38 | #include "lib_errors.h" |
9a12e9e5 | 39 | #include "northbound_cli.h" |
5920b3eb | 40 | #include "network.h" |
718e3744 | 41 | |
42 | #include "ripngd/ripngd.h" | |
43 | #include "ripngd/ripng_route.h" | |
44 | #include "ripngd/ripng_debug.h" | |
a94434b6 | 45 | #include "ripngd/ripng_nexthop.h" |
718e3744 | 46 | |
bf8d3d6a DL |
47 | DEFINE_MGROUP(RIPNGD, "ripngd"); |
48 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG, "RIPng structure"); | |
49 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_VRF_NAME, "RIPng VRF name"); | |
50 | DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_ROUTE, "RIPng route info"); | |
b3a7e30d | 51 | |
d62a17ae | 52 | enum { ripng_all_route, |
53 | ripng_changed_route, | |
718e3744 | 54 | }; |
55 | ||
03a38493 PG |
56 | static void ripng_distribute_update(struct distribute_ctx *ctx, |
57 | struct distribute *dist); | |
58 | ||
718e3744 | 59 | /* Prototypes. */ |
d62a17ae | 60 | void ripng_output_process(struct interface *, struct sockaddr_in6 *, int); |
dde7b15b RW |
61 | static void ripng_instance_enable(struct ripng *ripng, struct vrf *vrf, |
62 | int sock); | |
63 | static void ripng_instance_disable(struct ripng *ripng); | |
d62a17ae | 64 | int ripng_triggered_update(struct thread *); |
4b23867c PG |
65 | static void ripng_if_rmap_update(struct if_rmap_ctx *ctx, |
66 | struct if_rmap *if_rmap); | |
718e3744 | 67 | |
dde7b15b RW |
68 | /* Generate rb-tree of RIPng instances. */ |
69 | static inline int ripng_instance_compare(const struct ripng *a, | |
70 | const struct ripng *b) | |
71 | { | |
72 | return strcmp(a->vrf_name, b->vrf_name); | |
73 | } | |
74 | RB_GENERATE(ripng_instance_head, ripng, entry, ripng_instance_compare) | |
75 | ||
76 | struct ripng_instance_head ripng_instances = RB_INITIALIZER(&ripng_instances); | |
77 | ||
718e3744 | 78 | /* RIPng next hop specification. */ |
d62a17ae | 79 | struct ripng_nexthop { |
80 | enum ripng_nexthop_type { | |
81 | RIPNG_NEXTHOP_UNSPEC, | |
82 | RIPNG_NEXTHOP_ADDRESS | |
83 | } flag; | |
84 | struct in6_addr address; | |
718e3744 | 85 | }; |
718e3744 | 86 | |
49e06d25 | 87 | int ripng_route_rte(struct ripng_info *rinfo) |
a94434b6 | 88 | { |
d62a17ae | 89 | return (rinfo->type == ZEBRA_ROUTE_RIPNG |
90 | && rinfo->sub_type == RIPNG_ROUTE_RTE); | |
a94434b6 | 91 | } |
92 | ||
718e3744 | 93 | /* Allocate new ripng information. */ |
4d762f26 | 94 | struct ripng_info *ripng_info_new(void) |
718e3744 | 95 | { |
d62a17ae | 96 | struct ripng_info *new; |
718e3744 | 97 | |
d62a17ae | 98 | new = XCALLOC(MTYPE_RIPNG_ROUTE, sizeof(struct ripng_info)); |
99 | return new; | |
718e3744 | 100 | } |
101 | ||
102 | /* Free ripng information. */ | |
d62a17ae | 103 | void ripng_info_free(struct ripng_info *rinfo) |
718e3744 | 104 | { |
d62a17ae | 105 | XFREE(MTYPE_RIPNG_ROUTE, rinfo); |
718e3744 | 106 | } |
6b0655a2 | 107 | |
5c84b9a5 RW |
108 | struct ripng *ripng_info_get_instance(const struct ripng_info *rinfo) |
109 | { | |
110 | return agg_get_table_info(agg_get_table(rinfo->rp)); | |
111 | } | |
112 | ||
718e3744 | 113 | /* Create ripng socket. */ |
dde7b15b | 114 | int ripng_make_socket(struct vrf *vrf) |
718e3744 | 115 | { |
d62a17ae | 116 | int ret; |
117 | int sock; | |
118 | struct sockaddr_in6 ripaddr; | |
dde7b15b RW |
119 | const char *vrf_dev = NULL; |
120 | ||
121 | /* Make datagram socket. */ | |
122 | if (vrf->vrf_id != VRF_DEFAULT) | |
123 | vrf_dev = vrf->name; | |
0cf6db21 | 124 | frr_with_privs(&ripngd_privs) { |
dde7b15b RW |
125 | sock = vrf_socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, |
126 | vrf->vrf_id, vrf_dev); | |
127 | if (sock < 0) { | |
128 | flog_err_sys(EC_LIB_SOCKET, | |
129 | "Cannot create UDP socket: %s", | |
130 | safe_strerror(errno)); | |
131 | return -1; | |
132 | } | |
d62a17ae | 133 | } |
718e3744 | 134 | |
dde7b15b RW |
135 | sockopt_reuseaddr(sock); |
136 | sockopt_reuseport(sock); | |
d62a17ae | 137 | setsockopt_so_recvbuf(sock, 8096); |
138 | ret = setsockopt_ipv6_pktinfo(sock, 1); | |
139 | if (ret < 0) | |
44f12f20 | 140 | goto error; |
6d0732c8 | 141 | #ifdef IPTOS_PREC_INTERNETCONTROL |
d62a17ae | 142 | ret = setsockopt_ipv6_tclass(sock, IPTOS_PREC_INTERNETCONTROL); |
143 | if (ret < 0) | |
44f12f20 | 144 | goto error; |
6d0732c8 | 145 | #endif |
d62a17ae | 146 | ret = setsockopt_ipv6_multicast_hops(sock, 255); |
147 | if (ret < 0) | |
44f12f20 | 148 | goto error; |
d62a17ae | 149 | ret = setsockopt_ipv6_multicast_loop(sock, 0); |
150 | if (ret < 0) | |
44f12f20 | 151 | goto error; |
d62a17ae | 152 | ret = setsockopt_ipv6_hoplimit(sock, 1); |
153 | if (ret < 0) | |
44f12f20 | 154 | goto error; |
d62a17ae | 155 | |
156 | memset(&ripaddr, 0, sizeof(ripaddr)); | |
157 | ripaddr.sin6_family = AF_INET6; | |
718e3744 | 158 | #ifdef SIN6_LEN |
d62a17ae | 159 | ripaddr.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 160 | #endif /* SIN6_LEN */ |
d62a17ae | 161 | ripaddr.sin6_port = htons(RIPNG_PORT_DEFAULT); |
718e3744 | 162 | |
0cf6db21 | 163 | frr_with_privs(&ripngd_privs) { |
01b9e3fd DL |
164 | ret = bind(sock, (struct sockaddr *)&ripaddr, sizeof(ripaddr)); |
165 | if (ret < 0) { | |
633fc9b1 DL |
166 | zlog_err("Can't bind ripng socket: %s.", |
167 | safe_strerror(errno)); | |
01b9e3fd DL |
168 | goto error; |
169 | } | |
d62a17ae | 170 | } |
d62a17ae | 171 | return sock; |
44f12f20 RW |
172 | |
173 | error: | |
174 | close(sock); | |
175 | return ret; | |
718e3744 | 176 | } |
177 | ||
178 | /* Send RIPng packet. */ | |
d62a17ae | 179 | int ripng_send_packet(caddr_t buf, int bufsize, struct sockaddr_in6 *to, |
180 | struct interface *ifp) | |
181 | { | |
5c84b9a5 RW |
182 | struct ripng_interface *ri = ifp->info; |
183 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 184 | int ret; |
185 | struct msghdr msg; | |
186 | struct iovec iov; | |
187 | struct cmsghdr *cmsgptr; | |
2ae9e38f | 188 | char adata[256] = {}; |
d62a17ae | 189 | struct in6_pktinfo *pkt; |
190 | struct sockaddr_in6 addr; | |
191 | ||
192 | if (IS_RIPNG_DEBUG_SEND) { | |
193 | if (to) | |
194 | zlog_debug("send to %s", inet6_ntoa(to->sin6_addr)); | |
195 | zlog_debug(" send interface %s", ifp->name); | |
196 | zlog_debug(" send packet size %d", bufsize); | |
197 | } | |
198 | ||
199 | memset(&addr, 0, sizeof(struct sockaddr_in6)); | |
200 | addr.sin6_family = AF_INET6; | |
718e3744 | 201 | #ifdef SIN6_LEN |
d62a17ae | 202 | addr.sin6_len = sizeof(struct sockaddr_in6); |
718e3744 | 203 | #endif /* SIN6_LEN */ |
d62a17ae | 204 | addr.sin6_flowinfo = htonl(RIPNG_PRIORITY_DEFAULT); |
205 | ||
206 | /* When destination is specified. */ | |
207 | if (to != NULL) { | |
208 | addr.sin6_addr = to->sin6_addr; | |
209 | addr.sin6_port = to->sin6_port; | |
210 | } else { | |
211 | inet_pton(AF_INET6, RIPNG_GROUP, &addr.sin6_addr); | |
212 | addr.sin6_port = htons(RIPNG_PORT_DEFAULT); | |
213 | } | |
718e3744 | 214 | |
0af35d90 | 215 | memset(&msg, 0, sizeof(msg)); |
d62a17ae | 216 | msg.msg_name = (void *)&addr; |
217 | msg.msg_namelen = sizeof(struct sockaddr_in6); | |
218 | msg.msg_iov = &iov; | |
219 | msg.msg_iovlen = 1; | |
220 | msg.msg_control = (void *)adata; | |
221 | msg.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo)); | |
222 | ||
223 | iov.iov_base = buf; | |
224 | iov.iov_len = bufsize; | |
225 | ||
226 | cmsgptr = (struct cmsghdr *)adata; | |
227 | cmsgptr->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); | |
228 | cmsgptr->cmsg_level = IPPROTO_IPV6; | |
229 | cmsgptr->cmsg_type = IPV6_PKTINFO; | |
230 | ||
231 | pkt = (struct in6_pktinfo *)CMSG_DATA(cmsgptr); | |
232 | memset(&pkt->ipi6_addr, 0, sizeof(struct in6_addr)); | |
233 | pkt->ipi6_ifindex = ifp->ifindex; | |
234 | ||
235 | ret = sendmsg(ripng->sock, &msg, 0); | |
236 | ||
237 | if (ret < 0) { | |
238 | if (to) | |
450971aa | 239 | flog_err_sys(EC_LIB_SOCKET, |
09c866e3 QY |
240 | "RIPng send fail on %s to %s: %s", |
241 | ifp->name, inet6_ntoa(to->sin6_addr), | |
242 | safe_strerror(errno)); | |
d62a17ae | 243 | else |
1c50c1c0 QY |
244 | flog_err_sys(EC_LIB_SOCKET, "RIPng send fail on %s: %s", |
245 | ifp->name, safe_strerror(errno)); | |
d62a17ae | 246 | } |
718e3744 | 247 | |
d62a17ae | 248 | return ret; |
718e3744 | 249 | } |
250 | ||
251 | /* Receive UDP RIPng packet from socket. */ | |
d7c0a89a | 252 | static int ripng_recv_packet(int sock, uint8_t *buf, int bufsize, |
d62a17ae | 253 | struct sockaddr_in6 *from, ifindex_t *ifindex, |
254 | int *hoplimit) | |
255 | { | |
256 | int ret; | |
257 | struct msghdr msg; | |
258 | struct iovec iov; | |
259 | struct cmsghdr *cmsgptr; | |
260 | struct in6_addr dst = {.s6_addr = {0}}; | |
261 | ||
262 | memset(&dst, 0, sizeof(struct in6_addr)); | |
263 | ||
264 | /* Ancillary data. This store cmsghdr and in6_pktinfo. But at this | |
265 | point I can't determine size of cmsghdr */ | |
266 | char adata[1024]; | |
267 | ||
268 | /* Fill in message and iovec. */ | |
0af35d90 | 269 | memset(&msg, 0, sizeof(msg)); |
d62a17ae | 270 | msg.msg_name = (void *)from; |
271 | msg.msg_namelen = sizeof(struct sockaddr_in6); | |
272 | msg.msg_iov = &iov; | |
273 | msg.msg_iovlen = 1; | |
274 | msg.msg_control = (void *)adata; | |
0d6f7fd6 | 275 | msg.msg_controllen = sizeof(adata); |
d62a17ae | 276 | iov.iov_base = buf; |
277 | iov.iov_len = bufsize; | |
278 | ||
279 | /* If recvmsg fail return minus value. */ | |
280 | ret = recvmsg(sock, &msg, 0); | |
281 | if (ret < 0) | |
282 | return ret; | |
283 | ||
adf0e7c6 | 284 | for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL; |
d62a17ae | 285 | cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) { |
286 | /* I want interface index which this packet comes from. */ | |
287 | if (cmsgptr->cmsg_level == IPPROTO_IPV6 | |
288 | && cmsgptr->cmsg_type == IPV6_PKTINFO) { | |
289 | struct in6_pktinfo *ptr; | |
290 | ||
291 | ptr = (struct in6_pktinfo *)CMSG_DATA(cmsgptr); | |
292 | *ifindex = ptr->ipi6_ifindex; | |
293 | dst = ptr->ipi6_addr; | |
294 | ||
295 | if (*ifindex == 0) | |
296 | zlog_warn( | |
297 | "Interface index returned by IPV6_PKTINFO is zero"); | |
298 | } | |
299 | ||
300 | /* Incoming packet's multicast hop limit. */ | |
301 | if (cmsgptr->cmsg_level == IPPROTO_IPV6 | |
302 | && cmsgptr->cmsg_type == IPV6_HOPLIMIT) { | |
303 | int *phoplimit = (int *)CMSG_DATA(cmsgptr); | |
304 | *hoplimit = *phoplimit; | |
305 | } | |
5eb9d11b | 306 | } |
718e3744 | 307 | |
d62a17ae | 308 | /* Hoplimit check shold be done when destination address is |
309 | multicast address. */ | |
310 | if (!IN6_IS_ADDR_MULTICAST(&dst)) | |
311 | *hoplimit = -1; | |
718e3744 | 312 | |
d62a17ae | 313 | return ret; |
718e3744 | 314 | } |
315 | ||
316 | /* Dump rip packet */ | |
d62a17ae | 317 | void ripng_packet_dump(struct ripng_packet *packet, int size, |
318 | const char *sndrcv) | |
319 | { | |
320 | caddr_t lim; | |
321 | struct rte *rte; | |
322 | const char *command_str; | |
323 | ||
324 | /* Set command string. */ | |
325 | if (packet->command == RIPNG_REQUEST) | |
326 | command_str = "request"; | |
327 | else if (packet->command == RIPNG_RESPONSE) | |
328 | command_str = "response"; | |
329 | else | |
330 | command_str = "unknown"; | |
331 | ||
332 | /* Dump packet header. */ | |
333 | zlog_debug("%s %s version %d packet size %d", sndrcv, command_str, | |
334 | packet->version, size); | |
335 | ||
336 | /* Dump each routing table entry. */ | |
337 | rte = packet->rte; | |
338 | ||
339 | for (lim = (caddr_t)packet + size; (caddr_t)rte < lim; rte++) { | |
340 | if (rte->metric == RIPNG_METRIC_NEXTHOP) | |
341 | zlog_debug(" nexthop %s/%d", inet6_ntoa(rte->addr), | |
342 | rte->prefixlen); | |
343 | else | |
344 | zlog_debug(" %s/%d metric %d tag %" ROUTE_TAG_PRI, | |
345 | inet6_ntoa(rte->addr), rte->prefixlen, | |
346 | rte->metric, (route_tag_t)ntohs(rte->tag)); | |
347 | } | |
718e3744 | 348 | } |
349 | ||
350 | /* RIPng next hop address RTE (Route Table Entry). */ | |
d62a17ae | 351 | static void ripng_nexthop_rte(struct rte *rte, struct sockaddr_in6 *from, |
352 | struct ripng_nexthop *nexthop) | |
353 | { | |
d62a17ae | 354 | /* Logging before checking RTE. */ |
355 | if (IS_RIPNG_DEBUG_RECV) | |
356 | zlog_debug("RIPng nexthop RTE address %s tag %" ROUTE_TAG_PRI | |
357 | " prefixlen %d", | |
358 | inet6_ntoa(rte->addr), (route_tag_t)ntohs(rte->tag), | |
359 | rte->prefixlen); | |
360 | ||
361 | /* RFC2080 2.1.1 Next Hop: | |
362 | The route tag and prefix length in the next hop RTE must be | |
363 | set to zero on sending and ignored on receiption. */ | |
364 | if (ntohs(rte->tag) != 0) | |
365 | zlog_warn( | |
366 | "RIPng nexthop RTE with non zero tag value %" ROUTE_TAG_PRI | |
367 | " from %s", | |
368 | (route_tag_t)ntohs(rte->tag), | |
369 | inet6_ntoa(from->sin6_addr)); | |
370 | ||
371 | if (rte->prefixlen != 0) | |
372 | zlog_warn( | |
373 | "RIPng nexthop RTE with non zero prefixlen value %d from %s", | |
374 | rte->prefixlen, inet6_ntoa(from->sin6_addr)); | |
375 | ||
376 | /* Specifying a value of 0:0:0:0:0:0:0:0 in the prefix field of a | |
377 | next hop RTE indicates that the next hop address should be the | |
378 | originator of the RIPng advertisement. An address specified as a | |
379 | next hop must be a link-local address. */ | |
380 | if (IN6_IS_ADDR_UNSPECIFIED(&rte->addr)) { | |
381 | nexthop->flag = RIPNG_NEXTHOP_UNSPEC; | |
382 | memset(&nexthop->address, 0, sizeof(struct in6_addr)); | |
383 | return; | |
384 | } | |
718e3744 | 385 | |
d62a17ae | 386 | if (IN6_IS_ADDR_LINKLOCAL(&rte->addr)) { |
387 | nexthop->flag = RIPNG_NEXTHOP_ADDRESS; | |
388 | IPV6_ADDR_COPY(&nexthop->address, &rte->addr); | |
389 | return; | |
390 | } | |
718e3744 | 391 | |
d62a17ae | 392 | /* The purpose of the next hop RTE is to eliminate packets being |
393 | routed through extra hops in the system. It is particularly useful | |
394 | when RIPng is not being run on all of the routers on a network. | |
395 | Note that next hop RTE is "advisory". That is, if the provided | |
396 | information is ignored, a possibly sub-optimal, but absolutely | |
397 | valid, route may be taken. If the received next hop address is not | |
398 | a link-local address, it should be treated as 0:0:0:0:0:0:0:0. */ | |
0490a45f DS |
399 | zlog_warn("RIPng nexthop RTE with non link-local address %s from %pI6", |
400 | inet6_ntoa(rte->addr), &from->sin6_addr); | |
718e3744 | 401 | |
d62a17ae | 402 | nexthop->flag = RIPNG_NEXTHOP_UNSPEC; |
403 | memset(&nexthop->address, 0, sizeof(struct in6_addr)); | |
718e3744 | 404 | |
d62a17ae | 405 | return; |
718e3744 | 406 | } |
407 | ||
408 | /* If ifp has same link-local address then return 1. */ | |
d62a17ae | 409 | static int ripng_lladdr_check(struct interface *ifp, struct in6_addr *addr) |
718e3744 | 410 | { |
d62a17ae | 411 | struct listnode *node; |
412 | struct connected *connected; | |
413 | struct prefix *p; | |
718e3744 | 414 | |
d62a17ae | 415 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) { |
416 | p = connected->address; | |
718e3744 | 417 | |
d62a17ae | 418 | if (p->family == AF_INET6 |
419 | && IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6) | |
420 | && IN6_ARE_ADDR_EQUAL(&p->u.prefix6, addr)) | |
421 | return 1; | |
422 | } | |
423 | return 0; | |
718e3744 | 424 | } |
425 | ||
426 | /* RIPng route garbage collect timer. */ | |
d62a17ae | 427 | static int ripng_garbage_collect(struct thread *t) |
718e3744 | 428 | { |
d62a17ae | 429 | struct ripng_info *rinfo; |
fe08ba7e | 430 | struct agg_node *rp; |
718e3744 | 431 | |
d62a17ae | 432 | rinfo = THREAD_ARG(t); |
433 | rinfo->t_garbage_collect = NULL; | |
718e3744 | 434 | |
d62a17ae | 435 | /* Off timeout timer. */ |
436 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
718e3744 | 437 | |
d62a17ae | 438 | /* Get route_node pointer. */ |
439 | rp = rinfo->rp; | |
440 | ||
441 | /* Unlock route_node. */ | |
442 | listnode_delete(rp->info, rinfo); | |
443 | if (list_isempty((struct list *)rp->info)) { | |
6a154c88 | 444 | list_delete((struct list **)&rp->info); |
fe08ba7e | 445 | agg_unlock_node(rp); |
d62a17ae | 446 | } |
718e3744 | 447 | |
d62a17ae | 448 | /* Free RIPng routing information. */ |
449 | ripng_info_free(rinfo); | |
718e3744 | 450 | |
d62a17ae | 451 | return 0; |
718e3744 | 452 | } |
453 | ||
5c84b9a5 | 454 | static void ripng_timeout_update(struct ripng *ripng, struct ripng_info *rinfo); |
c880b636 FL |
455 | |
456 | /* Add new route to the ECMP list. | |
fac76f9c FL |
457 | * RETURN: the new entry added in the list, or NULL if it is not the first |
458 | * entry and ECMP is not allowed. | |
c880b636 | 459 | */ |
5c84b9a5 RW |
460 | struct ripng_info *ripng_ecmp_add(struct ripng *ripng, |
461 | struct ripng_info *rinfo_new) | |
718e3744 | 462 | { |
fe08ba7e | 463 | struct agg_node *rp = rinfo_new->rp; |
d62a17ae | 464 | struct ripng_info *rinfo = NULL; |
465 | struct list *list = NULL; | |
718e3744 | 466 | |
d62a17ae | 467 | if (rp->info == NULL) |
468 | rp->info = list_new(); | |
469 | list = (struct list *)rp->info; | |
718e3744 | 470 | |
d62a17ae | 471 | /* If ECMP is not allowed and some entry already exists in the list, |
472 | * do nothing. */ | |
473 | if (listcount(list) && !ripng->ecmp) | |
474 | return NULL; | |
fac76f9c | 475 | |
d62a17ae | 476 | rinfo = ripng_info_new(); |
477 | memcpy(rinfo, rinfo_new, sizeof(struct ripng_info)); | |
478 | listnode_add(list, rinfo); | |
c880b636 | 479 | |
d62a17ae | 480 | if (ripng_route_rte(rinfo)) { |
5c84b9a5 RW |
481 | ripng_timeout_update(ripng, rinfo); |
482 | ripng_zebra_ipv6_add(ripng, rp); | |
d62a17ae | 483 | } |
c880b636 | 484 | |
d62a17ae | 485 | ripng_aggregate_increment(rp, rinfo); |
c880b636 | 486 | |
d62a17ae | 487 | /* Set the route change flag on the first entry. */ |
488 | rinfo = listgetdata(listhead(list)); | |
489 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 490 | |
d62a17ae | 491 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 492 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
c880b636 | 493 | |
d62a17ae | 494 | return rinfo; |
c880b636 FL |
495 | } |
496 | ||
497 | /* Replace the ECMP list with the new route. | |
498 | * RETURN: the new entry added in the list | |
499 | */ | |
5c84b9a5 RW |
500 | struct ripng_info *ripng_ecmp_replace(struct ripng *ripng, |
501 | struct ripng_info *rinfo_new) | |
d62a17ae | 502 | { |
fe08ba7e | 503 | struct agg_node *rp = rinfo_new->rp; |
d62a17ae | 504 | struct list *list = (struct list *)rp->info; |
505 | struct ripng_info *rinfo = NULL, *tmp_rinfo = NULL; | |
506 | struct listnode *node = NULL, *nextnode = NULL; | |
507 | ||
508 | if (list == NULL || listcount(list) == 0) | |
5c84b9a5 | 509 | return ripng_ecmp_add(ripng, rinfo_new); |
d62a17ae | 510 | |
511 | /* Get the first entry */ | |
512 | rinfo = listgetdata(listhead(list)); | |
513 | ||
514 | /* Learnt route replaced by a local one. Delete it from zebra. */ | |
515 | if (ripng_route_rte(rinfo) && !ripng_route_rte(rinfo_new)) | |
516 | if (CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
5c84b9a5 | 517 | ripng_zebra_ipv6_delete(ripng, rp); |
d62a17ae | 518 | |
519 | if (rinfo->metric != RIPNG_METRIC_INFINITY) | |
520 | ripng_aggregate_decrement_list(rp, list); | |
521 | ||
522 | /* Re-use the first entry, and delete the others. */ | |
523 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
524 | if (tmp_rinfo != rinfo) { | |
525 | RIPNG_TIMER_OFF(tmp_rinfo->t_timeout); | |
526 | RIPNG_TIMER_OFF(tmp_rinfo->t_garbage_collect); | |
527 | list_delete_node(list, node); | |
528 | ripng_info_free(tmp_rinfo); | |
529 | } | |
c880b636 | 530 | |
d62a17ae | 531 | RIPNG_TIMER_OFF(rinfo->t_timeout); |
532 | RIPNG_TIMER_OFF(rinfo->t_garbage_collect); | |
533 | memcpy(rinfo, rinfo_new, sizeof(struct ripng_info)); | |
c880b636 | 534 | |
d62a17ae | 535 | if (ripng_route_rte(rinfo)) { |
5c84b9a5 | 536 | ripng_timeout_update(ripng, rinfo); |
d62a17ae | 537 | /* The ADD message implies an update. */ |
5c84b9a5 | 538 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 539 | } |
540 | ||
541 | ripng_aggregate_increment(rp, rinfo); | |
542 | ||
543 | /* Set the route change flag. */ | |
544 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 545 | |
d62a17ae | 546 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 547 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
718e3744 | 548 | |
d62a17ae | 549 | return rinfo; |
c880b636 FL |
550 | } |
551 | ||
552 | /* Delete one route from the ECMP list. | |
553 | * RETURN: | |
554 | * null - the entry is freed, and other entries exist in the list | |
555 | * the entry - the entry is the last one in the list; its metric is set | |
556 | * to INFINITY, and the garbage collector is started for it | |
557 | */ | |
5c84b9a5 RW |
558 | struct ripng_info *ripng_ecmp_delete(struct ripng *ripng, |
559 | struct ripng_info *rinfo) | |
d62a17ae | 560 | { |
fe08ba7e | 561 | struct agg_node *rp = rinfo->rp; |
d62a17ae | 562 | struct list *list = (struct list *)rp->info; |
563 | ||
564 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
565 | ||
566 | if (rinfo->metric != RIPNG_METRIC_INFINITY) | |
567 | ripng_aggregate_decrement(rp, rinfo); | |
568 | ||
569 | if (listcount(list) > 1) { | |
570 | /* Some other ECMP entries still exist. Just delete this entry. | |
571 | */ | |
572 | RIPNG_TIMER_OFF(rinfo->t_garbage_collect); | |
573 | listnode_delete(list, rinfo); | |
574 | if (ripng_route_rte(rinfo) | |
575 | && CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
576 | /* The ADD message implies the update. */ | |
5c84b9a5 | 577 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 578 | ripng_info_free(rinfo); |
579 | rinfo = NULL; | |
580 | } else { | |
581 | assert(rinfo == listgetdata(listhead(list))); | |
582 | ||
583 | /* This is the only entry left in the list. We must keep it in | |
584 | * the list for garbage collection time, with INFINITY metric. | |
585 | */ | |
586 | ||
587 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
588 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, ripng_garbage_collect, | |
589 | ripng->garbage_time); | |
590 | ||
591 | if (ripng_route_rte(rinfo) | |
592 | && CHECK_FLAG(rinfo->flags, RIPNG_RTF_FIB)) | |
5c84b9a5 | 593 | ripng_zebra_ipv6_delete(ripng, rp); |
d62a17ae | 594 | } |
c880b636 | 595 | |
d62a17ae | 596 | /* Set the route change flag on the first entry. */ |
597 | rinfo = listgetdata(listhead(list)); | |
598 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
c880b636 | 599 | |
d62a17ae | 600 | /* Signal the output process to trigger an update. */ |
5c84b9a5 | 601 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
c880b636 | 602 | |
d62a17ae | 603 | return rinfo; |
c880b636 FL |
604 | } |
605 | ||
606 | /* Timeout RIPng routes. */ | |
d62a17ae | 607 | static int ripng_timeout(struct thread *t) |
c880b636 | 608 | { |
5c84b9a5 RW |
609 | struct ripng_info *rinfo = THREAD_ARG(t); |
610 | struct ripng *ripng = ripng_info_get_instance(rinfo); | |
611 | ||
612 | ripng_ecmp_delete(ripng, rinfo); | |
613 | ||
d62a17ae | 614 | return 0; |
718e3744 | 615 | } |
616 | ||
5c84b9a5 | 617 | static void ripng_timeout_update(struct ripng *ripng, struct ripng_info *rinfo) |
718e3744 | 618 | { |
d62a17ae | 619 | if (rinfo->metric != RIPNG_METRIC_INFINITY) { |
620 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
5c84b9a5 RW |
621 | thread_add_timer(master, ripng_timeout, rinfo, |
622 | ripng->timeout_time, &rinfo->t_timeout); | |
d62a17ae | 623 | } |
718e3744 | 624 | } |
625 | ||
d62a17ae | 626 | static int ripng_filter(int ripng_distribute, struct prefix_ipv6 *p, |
627 | struct ripng_interface *ri) | |
628 | { | |
629 | struct distribute *dist; | |
630 | struct access_list *alist; | |
631 | struct prefix_list *plist; | |
632 | int distribute = ripng_distribute == RIPNG_FILTER_OUT | |
633 | ? DISTRIBUTE_V6_OUT | |
634 | : DISTRIBUTE_V6_IN; | |
635 | const char *inout = ripng_distribute == RIPNG_FILTER_OUT ? "out" : "in"; | |
636 | ||
637 | /* Input distribute-list filtering. */ | |
638 | if (ri->list[ripng_distribute]) { | |
639 | if (access_list_apply(ri->list[ripng_distribute], | |
640 | (struct prefix *)p) | |
641 | == FILTER_DENY) { | |
642 | if (IS_RIPNG_DEBUG_PACKET) | |
e0259674 | 643 | zlog_debug("%pFX filtered by distribute %s", p, |
d62a17ae | 644 | inout); |
645 | return -1; | |
646 | } | |
647 | } | |
648 | if (ri->prefix[ripng_distribute]) { | |
649 | if (prefix_list_apply(ri->prefix[ripng_distribute], | |
650 | (struct prefix *)p) | |
651 | == PREFIX_DENY) { | |
652 | if (IS_RIPNG_DEBUG_PACKET) | |
e0259674 | 653 | zlog_debug("%pFX filtered by prefix-list %s", p, |
d62a17ae | 654 | inout); |
655 | return -1; | |
a94434b6 | 656 | } |
a94434b6 | 657 | } |
a94434b6 | 658 | |
d62a17ae | 659 | /* All interface filter check. */ |
dde7b15b | 660 | dist = distribute_lookup(ri->ripng->distribute_ctx, NULL); |
d62a17ae | 661 | if (dist) { |
662 | if (dist->list[distribute]) { | |
663 | alist = access_list_lookup(AFI_IP6, | |
664 | dist->list[distribute]); | |
665 | ||
666 | if (alist) { | |
667 | if (access_list_apply(alist, (struct prefix *)p) | |
668 | == FILTER_DENY) { | |
669 | if (IS_RIPNG_DEBUG_PACKET) | |
670 | zlog_debug( | |
e0259674 DS |
671 | "%pFX filtered by distribute %s", |
672 | p, inout); | |
d62a17ae | 673 | return -1; |
674 | } | |
675 | } | |
a94434b6 | 676 | } |
d62a17ae | 677 | if (dist->prefix[distribute]) { |
678 | plist = prefix_list_lookup(AFI_IP6, | |
679 | dist->prefix[distribute]); | |
680 | ||
681 | if (plist) { | |
682 | if (prefix_list_apply(plist, (struct prefix *)p) | |
683 | == PREFIX_DENY) { | |
684 | if (IS_RIPNG_DEBUG_PACKET) | |
685 | zlog_debug( | |
e0259674 DS |
686 | "%pFX filtered by prefix-list %s", |
687 | p, inout); | |
d62a17ae | 688 | return -1; |
689 | } | |
690 | } | |
a94434b6 | 691 | } |
a94434b6 | 692 | } |
d62a17ae | 693 | return 0; |
a94434b6 | 694 | } |
695 | ||
718e3744 | 696 | /* Process RIPng route according to RFC2080. */ |
d62a17ae | 697 | static void ripng_route_process(struct rte *rte, struct sockaddr_in6 *from, |
698 | struct ripng_nexthop *ripng_nexthop, | |
699 | struct interface *ifp) | |
700 | { | |
701 | int ret; | |
702 | struct prefix_ipv6 p; | |
fe08ba7e | 703 | struct agg_node *rp; |
d62a17ae | 704 | struct ripng_info *rinfo = NULL, newinfo; |
705 | struct ripng_interface *ri; | |
5c84b9a5 | 706 | struct ripng *ripng; |
d62a17ae | 707 | struct in6_addr *nexthop; |
708 | int same = 0; | |
709 | struct list *list = NULL; | |
710 | struct listnode *node = NULL; | |
711 | ||
712 | /* Make prefix structure. */ | |
713 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
714 | p.family = AF_INET6; | |
715 | /* p.prefix = rte->addr; */ | |
716 | IPV6_ADDR_COPY(&p.prefix, &rte->addr); | |
717 | p.prefixlen = rte->prefixlen; | |
718 | ||
719 | /* Make sure mask is applied. */ | |
720 | /* XXX We have to check the prefix is valid or not before call | |
721 | apply_mask_ipv6. */ | |
722 | apply_mask_ipv6(&p); | |
723 | ||
d62a17ae | 724 | ri = ifp->info; |
5c84b9a5 | 725 | ripng = ri->ripng; |
d62a17ae | 726 | |
5c84b9a5 | 727 | /* Apply input filters. */ |
d62a17ae | 728 | ret = ripng_filter(RIPNG_FILTER_IN, &p, ri); |
729 | if (ret < 0) | |
730 | return; | |
731 | ||
732 | memset(&newinfo, 0, sizeof(newinfo)); | |
733 | newinfo.type = ZEBRA_ROUTE_RIPNG; | |
734 | newinfo.sub_type = RIPNG_ROUTE_RTE; | |
735 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) | |
736 | newinfo.nexthop = ripng_nexthop->address; | |
737 | else | |
738 | newinfo.nexthop = from->sin6_addr; | |
739 | newinfo.from = from->sin6_addr; | |
740 | newinfo.ifindex = ifp->ifindex; | |
741 | newinfo.metric = rte->metric; | |
742 | newinfo.metric_out = rte->metric; /* XXX */ | |
743 | newinfo.tag = ntohs(rte->tag); /* XXX */ | |
744 | ||
745 | /* Modify entry. */ | |
746 | if (ri->routemap[RIPNG_FILTER_IN]) { | |
d62a17ae | 747 | ret = route_map_apply(ri->routemap[RIPNG_FILTER_IN], |
1782514f | 748 | (struct prefix *)&p, &newinfo); |
d62a17ae | 749 | |
750 | if (ret == RMAP_DENYMATCH) { | |
751 | if (IS_RIPNG_DEBUG_PACKET) | |
752 | zlog_debug( | |
753 | "RIPng %s/%d is filtered by route-map in", | |
754 | inet6_ntoa(p.prefix), p.prefixlen); | |
755 | return; | |
756 | } | |
718e3744 | 757 | |
d62a17ae | 758 | /* Get back the object */ |
759 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) { | |
760 | if (!IPV6_ADDR_SAME(&newinfo.nexthop, | |
761 | &ripng_nexthop->address)) { | |
762 | /* the nexthop get changed by the routemap */ | |
763 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop)) | |
764 | ripng_nexthop->address = | |
765 | newinfo.nexthop; | |
766 | else | |
767 | ripng_nexthop->address = in6addr_any; | |
768 | } | |
769 | } else { | |
770 | if (!IPV6_ADDR_SAME(&newinfo.nexthop, | |
771 | &from->sin6_addr)) { | |
772 | /* the nexthop get changed by the routemap */ | |
773 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop)) { | |
774 | ripng_nexthop->flag = | |
775 | RIPNG_NEXTHOP_ADDRESS; | |
776 | ripng_nexthop->address = | |
777 | newinfo.nexthop; | |
778 | } | |
779 | } | |
780 | } | |
781 | rte->tag = htons(newinfo.tag_out); /* XXX */ | |
9d303b37 DL |
782 | rte->metric = |
783 | newinfo.metric_out; /* XXX: the routemap uses the | |
784 | metric_out field */ | |
d62a17ae | 785 | } |
a94434b6 | 786 | |
d62a17ae | 787 | /* Once the entry has been validated, update the metric by |
788 | * adding the cost of the network on wich the message | |
789 | * arrived. If the result is greater than infinity, use infinity | |
790 | * (RFC2453 Sec. 3.9.2) | |
791 | **/ | |
792 | ||
793 | /* Zebra ripngd can handle offset-list in. */ | |
5c84b9a5 | 794 | ret = ripng_offset_list_apply_in(ripng, &p, ifp, &rte->metric); |
d62a17ae | 795 | |
796 | /* If offset-list does not modify the metric use interface's | |
797 | * one. */ | |
798 | if (!ret) | |
799 | rte->metric += ifp->metric ? ifp->metric : 1; | |
800 | ||
801 | if (rte->metric > RIPNG_METRIC_INFINITY) | |
802 | rte->metric = RIPNG_METRIC_INFINITY; | |
803 | ||
804 | /* Set nexthop pointer. */ | |
805 | if (ripng_nexthop->flag == RIPNG_NEXTHOP_ADDRESS) | |
806 | nexthop = &ripng_nexthop->address; | |
807 | else | |
808 | nexthop = &from->sin6_addr; | |
809 | ||
810 | /* Lookup RIPng routing table. */ | |
fe08ba7e | 811 | rp = agg_node_get(ripng->table, (struct prefix *)&p); |
d62a17ae | 812 | |
813 | newinfo.rp = rp; | |
814 | newinfo.nexthop = *nexthop; | |
815 | newinfo.metric = rte->metric; | |
816 | newinfo.tag = ntohs(rte->tag); | |
817 | ||
818 | /* Check to see whether there is already RIPng route on the table. */ | |
819 | if ((list = rp->info) != NULL) | |
820 | for (ALL_LIST_ELEMENTS_RO(list, node, rinfo)) { | |
821 | /* Need to compare with redistributed entry or local | |
822 | * entry */ | |
823 | if (!ripng_route_rte(rinfo)) | |
824 | break; | |
825 | ||
826 | if (IPV6_ADDR_SAME(&rinfo->from, &from->sin6_addr) | |
827 | && IPV6_ADDR_SAME(&rinfo->nexthop, nexthop)) | |
828 | break; | |
829 | ||
830 | if (!listnextnode(node)) { | |
831 | /* Not found in the list */ | |
832 | ||
833 | if (rte->metric > rinfo->metric) { | |
834 | /* New route has a greater metric. | |
835 | * Discard it. */ | |
fe08ba7e | 836 | agg_unlock_node(rp); |
d62a17ae | 837 | return; |
838 | } | |
839 | ||
840 | if (rte->metric < rinfo->metric) | |
841 | /* New route has a smaller metric. | |
842 | * Replace the ECMP list | |
843 | * with the new one in below. */ | |
844 | break; | |
845 | ||
846 | /* Metrics are same. Unless ECMP is disabled, | |
847 | * keep "rinfo" null and | |
848 | * the new route is added in the ECMP list in | |
849 | * below. */ | |
850 | if (!ripng->ecmp) | |
851 | break; | |
852 | } | |
853 | } | |
718e3744 | 854 | |
d62a17ae | 855 | if (rinfo) { |
856 | /* Redistributed route check. */ | |
857 | if (rinfo->type != ZEBRA_ROUTE_RIPNG | |
858 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 859 | agg_unlock_node(rp); |
d62a17ae | 860 | return; |
861 | } | |
a94434b6 | 862 | |
d62a17ae | 863 | /* Local static route. */ |
864 | if (rinfo->type == ZEBRA_ROUTE_RIPNG | |
865 | && ((rinfo->sub_type == RIPNG_ROUTE_STATIC) | |
866 | || (rinfo->sub_type == RIPNG_ROUTE_DEFAULT)) | |
867 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 868 | agg_unlock_node(rp); |
d62a17ae | 869 | return; |
870 | } | |
871 | } | |
a94434b6 | 872 | |
d62a17ae | 873 | if (!rinfo) { |
874 | /* Now, check to see whether there is already an explicit route | |
875 | for the destination prefix. If there is no such route, add | |
876 | this route to the routing table, unless the metric is | |
877 | infinity (there is no point in adding a route which | |
878 | unusable). */ | |
879 | if (rte->metric != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 880 | ripng_ecmp_add(ripng, &newinfo); |
3e7a9652 | 881 | else |
fe08ba7e | 882 | agg_unlock_node(rp); |
d62a17ae | 883 | } else { |
884 | /* If there is an existing route, compare the next hop address | |
885 | to the address of the router from which the datagram came. | |
886 | If this datagram is from the same router as the existing | |
887 | route, reinitialize the timeout. */ | |
888 | same = (IN6_ARE_ADDR_EQUAL(&rinfo->from, &from->sin6_addr) | |
889 | && (rinfo->ifindex == ifp->ifindex)); | |
890 | ||
891 | /* | |
892 | * RFC 2080 - Section 2.4.2: | |
893 | * "If the new metric is the same as the old one, examine the | |
894 | * timeout | |
895 | * for the existing route. If it is at least halfway to the | |
896 | * expiration | |
897 | * point, switch to the new route. This heuristic is optional, | |
898 | * but | |
899 | * highly recommended". | |
900 | */ | |
901 | if (!ripng->ecmp && !same && rinfo->metric == rte->metric | |
902 | && rinfo->t_timeout | |
903 | && (thread_timer_remain_second(rinfo->t_timeout) | |
904 | < (ripng->timeout_time / 2))) { | |
5c84b9a5 | 905 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 906 | } |
907 | /* Next, compare the metrics. If the datagram is from the same | |
908 | router as the existing route, and the new metric is different | |
909 | than the old one; or, if the new metric is lower than the old | |
910 | one; do the following actions: */ | |
911 | else if ((same && rinfo->metric != rte->metric) | |
912 | || rte->metric < rinfo->metric) { | |
913 | if (listcount(list) == 1) { | |
914 | if (newinfo.metric != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 915 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 916 | else |
5c84b9a5 | 917 | ripng_ecmp_delete(ripng, rinfo); |
d62a17ae | 918 | } else { |
919 | if (newinfo.metric < rinfo->metric) | |
5c84b9a5 | 920 | ripng_ecmp_replace(ripng, &newinfo); |
d62a17ae | 921 | else /* newinfo.metric > rinfo->metric */ |
5c84b9a5 | 922 | ripng_ecmp_delete(ripng, rinfo); |
d62a17ae | 923 | } |
924 | } else /* same & no change */ | |
5c84b9a5 | 925 | ripng_timeout_update(ripng, rinfo); |
d62a17ae | 926 | |
927 | /* Unlock tempolary lock of the route. */ | |
fe08ba7e | 928 | agg_unlock_node(rp); |
d62a17ae | 929 | } |
718e3744 | 930 | } |
931 | ||
d62a17ae | 932 | /* Add redistributed route to RIPng table. */ |
5c84b9a5 RW |
933 | void ripng_redistribute_add(struct ripng *ripng, int type, int sub_type, |
934 | struct prefix_ipv6 *p, ifindex_t ifindex, | |
935 | struct in6_addr *nexthop, route_tag_t tag) | |
d62a17ae | 936 | { |
fe08ba7e | 937 | struct agg_node *rp; |
d62a17ae | 938 | struct ripng_info *rinfo = NULL, newinfo; |
939 | struct list *list = NULL; | |
940 | ||
941 | /* Redistribute route */ | |
942 | if (IN6_IS_ADDR_LINKLOCAL(&p->prefix)) | |
943 | return; | |
944 | if (IN6_IS_ADDR_LOOPBACK(&p->prefix)) | |
945 | return; | |
946 | ||
fe08ba7e | 947 | rp = agg_node_get(ripng->table, (struct prefix *)p); |
d62a17ae | 948 | |
949 | memset(&newinfo, 0, sizeof(struct ripng_info)); | |
950 | newinfo.type = type; | |
951 | newinfo.sub_type = sub_type; | |
952 | newinfo.ifindex = ifindex; | |
953 | newinfo.metric = 1; | |
954 | if (tag <= UINT16_MAX) /* RIPng only supports 16 bit tags */ | |
955 | newinfo.tag = tag; | |
956 | newinfo.rp = rp; | |
957 | if (nexthop && IN6_IS_ADDR_LINKLOCAL(nexthop)) | |
958 | newinfo.nexthop = *nexthop; | |
959 | ||
960 | if ((list = rp->info) != NULL && listcount(list) != 0) { | |
961 | rinfo = listgetdata(listhead(list)); | |
962 | ||
963 | if (rinfo->type == ZEBRA_ROUTE_CONNECT | |
964 | && rinfo->sub_type == RIPNG_ROUTE_INTERFACE | |
965 | && rinfo->metric != RIPNG_METRIC_INFINITY) { | |
fe08ba7e | 966 | agg_unlock_node(rp); |
d62a17ae | 967 | return; |
968 | } | |
969 | ||
970 | /* Manually configured RIPng route check. | |
971 | * They have the precedence on all the other entries. | |
972 | **/ | |
973 | if (rinfo->type == ZEBRA_ROUTE_RIPNG | |
974 | && ((rinfo->sub_type == RIPNG_ROUTE_STATIC) | |
975 | || (rinfo->sub_type == RIPNG_ROUTE_DEFAULT))) { | |
976 | if (type != ZEBRA_ROUTE_RIPNG | |
977 | || ((sub_type != RIPNG_ROUTE_STATIC) | |
978 | && (sub_type != RIPNG_ROUTE_DEFAULT))) { | |
fe08ba7e | 979 | agg_unlock_node(rp); |
d62a17ae | 980 | return; |
981 | } | |
982 | } | |
718e3744 | 983 | |
5c84b9a5 | 984 | ripng_ecmp_replace(ripng, &newinfo); |
fe08ba7e | 985 | agg_unlock_node(rp); |
d62a17ae | 986 | } else |
5c84b9a5 | 987 | ripng_ecmp_add(ripng, &newinfo); |
d62a17ae | 988 | |
989 | if (IS_RIPNG_DEBUG_EVENT) { | |
990 | if (!nexthop) | |
991 | zlog_debug( | |
e0259674 DS |
992 | "Redistribute new prefix %pFX on the interface %s", |
993 | p, ifindex2ifname(ifindex, ripng->vrf->vrf_id)); | |
d62a17ae | 994 | else |
995 | zlog_debug( | |
e0259674 DS |
996 | "Redistribute new prefix %pFX with nexthop %s on the interface %s", |
997 | p, inet6_ntoa(*nexthop), | |
dde7b15b | 998 | ifindex2ifname(ifindex, ripng->vrf->vrf_id)); |
d62a17ae | 999 | } |
718e3744 | 1000 | |
5c84b9a5 | 1001 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1002 | } |
718e3744 | 1003 | |
d62a17ae | 1004 | /* Delete redistributed route to RIPng table. */ |
5c84b9a5 RW |
1005 | void ripng_redistribute_delete(struct ripng *ripng, int type, int sub_type, |
1006 | struct prefix_ipv6 *p, ifindex_t ifindex) | |
d62a17ae | 1007 | { |
fe08ba7e | 1008 | struct agg_node *rp; |
d62a17ae | 1009 | struct ripng_info *rinfo; |
1010 | ||
1011 | if (IN6_IS_ADDR_LINKLOCAL(&p->prefix)) | |
1012 | return; | |
1013 | if (IN6_IS_ADDR_LOOPBACK(&p->prefix)) | |
1014 | return; | |
1015 | ||
fe08ba7e | 1016 | rp = agg_node_lookup(ripng->table, (struct prefix *)p); |
d62a17ae | 1017 | |
1018 | if (rp) { | |
1019 | struct list *list = rp->info; | |
1020 | ||
1021 | if (list != NULL && listcount(list) != 0) { | |
1022 | rinfo = listgetdata(listhead(list)); | |
1023 | if (rinfo != NULL && rinfo->type == type | |
1024 | && rinfo->sub_type == sub_type | |
1025 | && rinfo->ifindex == ifindex) { | |
1026 | /* Perform poisoned reverse. */ | |
1027 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
1028 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, | |
1029 | ripng_garbage_collect, | |
1030 | ripng->garbage_time); | |
1031 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
1032 | ||
1033 | /* Aggregate count decrement. */ | |
1034 | ripng_aggregate_decrement(rp, rinfo); | |
1035 | ||
1036 | rinfo->flags |= RIPNG_RTF_CHANGED; | |
1037 | ||
1038 | if (IS_RIPNG_DEBUG_EVENT) | |
1039 | zlog_debug( | |
e0259674 DS |
1040 | "Poisone %pFX on the interface %s with an infinity metric [delete]", |
1041 | p, | |
dde7b15b RW |
1042 | ifindex2ifname( |
1043 | ifindex, | |
1044 | ripng->vrf->vrf_id)); | |
d62a17ae | 1045 | |
5c84b9a5 | 1046 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1047 | } |
1048 | } | |
fe08ba7e | 1049 | agg_unlock_node(rp); |
d62a17ae | 1050 | } |
718e3744 | 1051 | } |
1052 | ||
1053 | /* Withdraw redistributed route. */ | |
5c84b9a5 | 1054 | void ripng_redistribute_withdraw(struct ripng *ripng, int type) |
d62a17ae | 1055 | { |
fe08ba7e | 1056 | struct agg_node *rp; |
d62a17ae | 1057 | struct ripng_info *rinfo = NULL; |
1058 | struct list *list = NULL; | |
1059 | ||
fe08ba7e | 1060 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 1061 | if ((list = rp->info) != NULL) { |
1062 | rinfo = listgetdata(listhead(list)); | |
1063 | if ((rinfo->type == type) | |
1064 | && (rinfo->sub_type != RIPNG_ROUTE_INTERFACE)) { | |
1065 | /* Perform poisoned reverse. */ | |
1066 | rinfo->metric = RIPNG_METRIC_INFINITY; | |
1067 | RIPNG_TIMER_ON(rinfo->t_garbage_collect, | |
1068 | ripng_garbage_collect, | |
1069 | ripng->garbage_time); | |
1070 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
1071 | ||
1072 | /* Aggregate count decrement. */ | |
1073 | ripng_aggregate_decrement(rp, rinfo); | |
1074 | ||
1075 | rinfo->flags |= RIPNG_RTF_CHANGED; | |
1076 | ||
1077 | if (IS_RIPNG_DEBUG_EVENT) { | |
1078 | struct prefix_ipv6 *p = | |
26a3ffd6 DS |
1079 | (struct prefix_ipv6 *) |
1080 | agg_node_get_prefix(rp); | |
d62a17ae | 1081 | |
1082 | zlog_debug( | |
e0259674 DS |
1083 | "Poisone %pFX on the interface %s [withdraw]", |
1084 | p, | |
dde7b15b RW |
1085 | ifindex2ifname( |
1086 | rinfo->ifindex, | |
1087 | ripng->vrf->vrf_id)); | |
d62a17ae | 1088 | } |
1089 | ||
5c84b9a5 | 1090 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 1091 | } |
1092 | } | |
1093 | } | |
718e3744 | 1094 | |
d62a17ae | 1095 | /* RIP routing information. */ |
1096 | static void ripng_response_process(struct ripng_packet *packet, int size, | |
1097 | struct sockaddr_in6 *from, | |
1098 | struct interface *ifp, int hoplimit) | |
1099 | { | |
5c84b9a5 RW |
1100 | struct ripng_interface *ri = ifp->info; |
1101 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 1102 | caddr_t lim; |
1103 | struct rte *rte; | |
1104 | struct ripng_nexthop nexthop; | |
1105 | ||
1106 | /* RFC2080 2.4.2 Response Messages: | |
1107 | The Response must be ignored if it is not from the RIPng port. */ | |
1108 | if (ntohs(from->sin6_port) != RIPNG_PORT_DEFAULT) { | |
1109 | zlog_warn("RIPng packet comes from non RIPng port %d from %s", | |
1110 | ntohs(from->sin6_port), inet6_ntoa(from->sin6_addr)); | |
5c84b9a5 | 1111 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1112 | return; |
1113 | } | |
718e3744 | 1114 | |
d62a17ae | 1115 | /* The datagram's IPv6 source address should be checked to see |
1116 | whether the datagram is from a valid neighbor; the source of the | |
1117 | datagram must be a link-local address. */ | |
1118 | if (!IN6_IS_ADDR_LINKLOCAL(&from->sin6_addr)) { | |
1119 | zlog_warn("RIPng packet comes from non link local address %s", | |
1120 | inet6_ntoa(from->sin6_addr)); | |
5c84b9a5 | 1121 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1122 | return; |
1123 | } | |
a94434b6 | 1124 | |
d62a17ae | 1125 | /* It is also worth checking to see whether the response is from one |
1126 | of the router's own addresses. Interfaces on broadcast networks | |
1127 | may receive copies of their own multicasts immediately. If a | |
1128 | router processes its own output as new input, confusion is likely, | |
1129 | and such datagrams must be ignored. */ | |
1130 | if (ripng_lladdr_check(ifp, &from->sin6_addr)) { | |
1131 | zlog_warn( | |
1132 | "RIPng packet comes from my own link local address %s", | |
1133 | inet6_ntoa(from->sin6_addr)); | |
5c84b9a5 | 1134 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1135 | return; |
1136 | } | |
a94434b6 | 1137 | |
d62a17ae | 1138 | /* As an additional check, periodic advertisements must have their |
1139 | hop counts set to 255, and inbound, multicast packets sent from the | |
1140 | RIPng port (i.e. periodic advertisement or triggered update | |
1141 | packets) must be examined to ensure that the hop count is 255. */ | |
1142 | if (hoplimit >= 0 && hoplimit != 255) { | |
1143 | zlog_warn( | |
1144 | "RIPng packet comes with non 255 hop count %d from %s", | |
1145 | hoplimit, inet6_ntoa(from->sin6_addr)); | |
5c84b9a5 | 1146 | ripng_peer_bad_packet(ripng, from); |
d62a17ae | 1147 | return; |
1148 | } | |
718e3744 | 1149 | |
d62a17ae | 1150 | /* Update RIPng peer. */ |
5c84b9a5 | 1151 | ripng_peer_update(ripng, from, packet->version); |
a94434b6 | 1152 | |
d62a17ae | 1153 | /* Reset nexthop. */ |
1154 | memset(&nexthop, 0, sizeof(struct ripng_nexthop)); | |
1155 | nexthop.flag = RIPNG_NEXTHOP_UNSPEC; | |
718e3744 | 1156 | |
d62a17ae | 1157 | /* Set RTE pointer. */ |
1158 | rte = packet->rte; | |
718e3744 | 1159 | |
d62a17ae | 1160 | for (lim = ((caddr_t)packet) + size; (caddr_t)rte < lim; rte++) { |
1161 | /* First of all, we have to check this RTE is next hop RTE or | |
1162 | not. Next hop RTE is completely different with normal RTE so | |
1163 | we need special treatment. */ | |
1164 | if (rte->metric == RIPNG_METRIC_NEXTHOP) { | |
1165 | ripng_nexthop_rte(rte, from, &nexthop); | |
1166 | continue; | |
1167 | } | |
718e3744 | 1168 | |
d62a17ae | 1169 | /* RTE information validation. */ |
1170 | ||
1171 | /* - is the destination prefix valid (e.g., not a multicast | |
1172 | prefix and not a link-local address) A link-local address | |
1173 | should never be present in an RTE. */ | |
1174 | if (IN6_IS_ADDR_MULTICAST(&rte->addr)) { | |
1175 | zlog_warn( | |
1176 | "Destination prefix is a multicast address %s/%d [%d]", | |
1177 | inet6_ntoa(rte->addr), rte->prefixlen, | |
1178 | rte->metric); | |
5c84b9a5 | 1179 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1180 | continue; |
1181 | } | |
1182 | if (IN6_IS_ADDR_LINKLOCAL(&rte->addr)) { | |
1183 | zlog_warn( | |
1184 | "Destination prefix is a link-local address %s/%d [%d]", | |
1185 | inet6_ntoa(rte->addr), rte->prefixlen, | |
1186 | rte->metric); | |
5c84b9a5 | 1187 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1188 | continue; |
1189 | } | |
1190 | if (IN6_IS_ADDR_LOOPBACK(&rte->addr)) { | |
1191 | zlog_warn( | |
1192 | "Destination prefix is a loopback address %s/%d [%d]", | |
1193 | inet6_ntoa(rte->addr), rte->prefixlen, | |
1194 | rte->metric); | |
5c84b9a5 | 1195 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1196 | continue; |
1197 | } | |
718e3744 | 1198 | |
d62a17ae | 1199 | /* - is the prefix length valid (i.e., between 0 and 128, |
1200 | inclusive) */ | |
1201 | if (rte->prefixlen > 128) { | |
1202 | zlog_warn("Invalid prefix length %s/%d from %s%%%s", | |
1203 | inet6_ntoa(rte->addr), rte->prefixlen, | |
1204 | inet6_ntoa(from->sin6_addr), ifp->name); | |
5c84b9a5 | 1205 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1206 | continue; |
1207 | } | |
718e3744 | 1208 | |
d62a17ae | 1209 | /* - is the metric valid (i.e., between 1 and 16, inclusive) */ |
1210 | if (!(rte->metric >= 1 && rte->metric <= 16)) { | |
1211 | zlog_warn("Invalid metric %d from %s%%%s", rte->metric, | |
1212 | inet6_ntoa(from->sin6_addr), ifp->name); | |
5c84b9a5 | 1213 | ripng_peer_bad_route(ripng, from); |
d62a17ae | 1214 | continue; |
1215 | } | |
718e3744 | 1216 | |
d62a17ae | 1217 | /* Vincent: XXX Should we compute the direclty reachable nexthop |
1218 | * for our RIPng network ? | |
1219 | **/ | |
718e3744 | 1220 | |
d62a17ae | 1221 | /* Routing table updates. */ |
1222 | ripng_route_process(rte, from, &nexthop, ifp); | |
1223 | } | |
718e3744 | 1224 | } |
1225 | ||
1226 | /* Response to request message. */ | |
d62a17ae | 1227 | static void ripng_request_process(struct ripng_packet *packet, int size, |
1228 | struct sockaddr_in6 *from, | |
1229 | struct interface *ifp) | |
1230 | { | |
5c84b9a5 | 1231 | struct ripng *ripng; |
d62a17ae | 1232 | caddr_t lim; |
1233 | struct rte *rte; | |
1234 | struct prefix_ipv6 p; | |
fe08ba7e | 1235 | struct agg_node *rp; |
d62a17ae | 1236 | struct ripng_info *rinfo; |
1237 | struct ripng_interface *ri; | |
1238 | ||
1239 | /* Does not reponse to the requests on the loopback interfaces */ | |
1240 | if (if_is_loopback(ifp)) | |
1241 | return; | |
1242 | ||
1243 | /* Check RIPng process is enabled on this interface. */ | |
1244 | ri = ifp->info; | |
1245 | if (!ri->running) | |
1246 | return; | |
5c84b9a5 | 1247 | ripng = ri->ripng; |
d62a17ae | 1248 | |
1249 | /* When passive interface is specified, suppress responses */ | |
1250 | if (ri->passive) | |
1251 | return; | |
1252 | ||
1253 | /* RIPng peer update. */ | |
5c84b9a5 | 1254 | ripng_peer_update(ripng, from, packet->version); |
d62a17ae | 1255 | |
1256 | lim = ((caddr_t)packet) + size; | |
1257 | rte = packet->rte; | |
1258 | ||
1259 | /* The Request is processed entry by entry. If there are no | |
1260 | entries, no response is given. */ | |
1261 | if (lim == (caddr_t)rte) | |
1262 | return; | |
1263 | ||
1264 | /* There is one special case. If there is exactly one entry in the | |
1265 | request, and it has a destination prefix of zero, a prefix length | |
1266 | of zero, and a metric of infinity (i.e., 16), then this is a | |
1267 | request to send the entire routing table. In that case, a call | |
1268 | is made to the output process to send the routing table to the | |
1269 | requesting address/port. */ | |
1270 | if (lim == ((caddr_t)(rte + 1)) && IN6_IS_ADDR_UNSPECIFIED(&rte->addr) | |
1271 | && rte->prefixlen == 0 && rte->metric == RIPNG_METRIC_INFINITY) { | |
1272 | /* All route with split horizon */ | |
1273 | ripng_output_process(ifp, from, ripng_all_route); | |
1274 | } else { | |
1275 | /* Except for this special case, processing is quite simple. | |
1276 | Examine the list of RTEs in the Request one by one. For each | |
1277 | entry, look up the destination in the router's routing | |
1278 | database and, if there is a route, put that route's metric in | |
1279 | the metric field of the RTE. If there is no explicit route | |
1280 | to the specified destination, put infinity in the metric | |
1281 | field. Once all the entries have been filled in, change the | |
1282 | command from Request to Response and send the datagram back | |
1283 | to the requestor. */ | |
1284 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
1285 | p.family = AF_INET6; | |
1286 | ||
1287 | for (; ((caddr_t)rte) < lim; rte++) { | |
1288 | p.prefix = rte->addr; | |
1289 | p.prefixlen = rte->prefixlen; | |
1290 | apply_mask_ipv6(&p); | |
1291 | ||
fe08ba7e | 1292 | rp = agg_node_lookup(ripng->table, (struct prefix *)&p); |
d62a17ae | 1293 | |
1294 | if (rp) { | |
1295 | rinfo = listgetdata( | |
1296 | listhead((struct list *)rp->info)); | |
1297 | rte->metric = rinfo->metric; | |
fe08ba7e | 1298 | agg_unlock_node(rp); |
d62a17ae | 1299 | } else |
1300 | rte->metric = RIPNG_METRIC_INFINITY; | |
1301 | } | |
1302 | packet->command = RIPNG_RESPONSE; | |
1303 | ||
1304 | ripng_send_packet((caddr_t)packet, size, from, ifp); | |
1305 | } | |
718e3744 | 1306 | } |
1307 | ||
1308 | /* First entry point of reading RIPng packet. */ | |
d62a17ae | 1309 | static int ripng_read(struct thread *thread) |
1310 | { | |
5c84b9a5 | 1311 | struct ripng *ripng = THREAD_ARG(thread); |
d62a17ae | 1312 | int len; |
1313 | int sock; | |
1314 | struct sockaddr_in6 from; | |
1315 | struct ripng_packet *packet; | |
1316 | ifindex_t ifindex = 0; | |
1317 | struct interface *ifp; | |
1318 | int hoplimit = -1; | |
1319 | ||
1320 | /* Check ripng is active and alive. */ | |
1321 | assert(ripng != NULL); | |
1322 | assert(ripng->sock >= 0); | |
1323 | ||
1324 | /* Fetch thread data and set read pointer to empty for event | |
1325 | managing. `sock' sould be same as ripng->sock. */ | |
1326 | sock = THREAD_FD(thread); | |
1327 | ripng->t_read = NULL; | |
1328 | ||
1329 | /* Add myself to the next event. */ | |
5c84b9a5 | 1330 | ripng_event(ripng, RIPNG_READ, sock); |
d62a17ae | 1331 | |
1332 | /* Read RIPng packet. */ | |
1333 | len = ripng_recv_packet(sock, STREAM_DATA(ripng->ibuf), | |
1334 | STREAM_SIZE(ripng->ibuf), &from, &ifindex, | |
1335 | &hoplimit); | |
1336 | if (len < 0) { | |
dde7b15b RW |
1337 | zlog_warn("RIPng recvfrom failed (VRF %s): %s.", |
1338 | ripng->vrf_name, safe_strerror(errno)); | |
d62a17ae | 1339 | return len; |
1340 | } | |
718e3744 | 1341 | |
d62a17ae | 1342 | /* Check RTE boundary. RTE size (Packet length - RIPng header size |
1343 | (4)) must be multiple size of one RTE size (20). */ | |
1344 | if (((len - 4) % 20) != 0) { | |
dde7b15b RW |
1345 | zlog_warn("RIPng invalid packet size %d from %s (VRF %s)", len, |
1346 | inet6_ntoa(from.sin6_addr), ripng->vrf_name); | |
5c84b9a5 | 1347 | ripng_peer_bad_packet(ripng, &from); |
d62a17ae | 1348 | return 0; |
1349 | } | |
718e3744 | 1350 | |
d62a17ae | 1351 | packet = (struct ripng_packet *)STREAM_DATA(ripng->ibuf); |
dde7b15b | 1352 | ifp = if_lookup_by_index(ifindex, ripng->vrf->vrf_id); |
718e3744 | 1353 | |
d62a17ae | 1354 | /* RIPng packet received. */ |
1355 | if (IS_RIPNG_DEBUG_EVENT) | |
dde7b15b RW |
1356 | zlog_debug( |
1357 | "RIPng packet received from %s port %d on %s (VRF %s)", | |
1358 | inet6_ntoa(from.sin6_addr), ntohs(from.sin6_port), | |
1359 | ifp ? ifp->name : "unknown", ripng->vrf_name); | |
718e3744 | 1360 | |
d62a17ae | 1361 | /* Logging before packet checking. */ |
1362 | if (IS_RIPNG_DEBUG_RECV) | |
1363 | ripng_packet_dump(packet, len, "RECV"); | |
718e3744 | 1364 | |
d62a17ae | 1365 | /* Packet comes from unknown interface. */ |
1366 | if (ifp == NULL) { | |
dde7b15b RW |
1367 | zlog_warn( |
1368 | "RIPng packet comes from unknown interface %d (VRF %s)", | |
1369 | ifindex, ripng->vrf_name); | |
d62a17ae | 1370 | return 0; |
1371 | } | |
718e3744 | 1372 | |
d62a17ae | 1373 | /* Packet version mismatch checking. */ |
1374 | if (packet->version != ripng->version) { | |
1375 | zlog_warn( | |
dde7b15b RW |
1376 | "RIPng packet version %d doesn't fit to my version %d (VRF %s)", |
1377 | packet->version, ripng->version, ripng->vrf_name); | |
5c84b9a5 | 1378 | ripng_peer_bad_packet(ripng, &from); |
d62a17ae | 1379 | return 0; |
1380 | } | |
718e3744 | 1381 | |
d62a17ae | 1382 | /* Process RIPng packet. */ |
1383 | switch (packet->command) { | |
1384 | case RIPNG_REQUEST: | |
1385 | ripng_request_process(packet, len, &from, ifp); | |
1386 | break; | |
1387 | case RIPNG_RESPONSE: | |
1388 | ripng_response_process(packet, len, &from, ifp, hoplimit); | |
1389 | break; | |
1390 | default: | |
dde7b15b RW |
1391 | zlog_warn("Invalid RIPng command %d (VRF %s)", packet->command, |
1392 | ripng->vrf_name); | |
5c84b9a5 | 1393 | ripng_peer_bad_packet(ripng, &from); |
d62a17ae | 1394 | break; |
1395 | } | |
1396 | return 0; | |
718e3744 | 1397 | } |
1398 | ||
1399 | /* Walk down the RIPng routing table then clear changed flag. */ | |
5c84b9a5 | 1400 | static void ripng_clear_changed_flag(struct ripng *ripng) |
718e3744 | 1401 | { |
fe08ba7e | 1402 | struct agg_node *rp; |
d62a17ae | 1403 | struct ripng_info *rinfo = NULL; |
1404 | struct list *list = NULL; | |
1405 | struct listnode *listnode = NULL; | |
718e3744 | 1406 | |
fe08ba7e | 1407 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 1408 | if ((list = rp->info) != NULL) |
1409 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
1410 | UNSET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
1411 | /* This flag can be set only on the first entry. | |
1412 | */ | |
1413 | break; | |
1414 | } | |
718e3744 | 1415 | } |
1416 | ||
1417 | /* Regular update of RIPng route. Send all routing formation to RIPng | |
1418 | enabled interface. */ | |
d62a17ae | 1419 | static int ripng_update(struct thread *t) |
718e3744 | 1420 | { |
5c84b9a5 | 1421 | struct ripng *ripng = THREAD_ARG(t); |
d62a17ae | 1422 | struct interface *ifp; |
1423 | struct ripng_interface *ri; | |
718e3744 | 1424 | |
d62a17ae | 1425 | /* Clear update timer thread. */ |
1426 | ripng->t_update = NULL; | |
718e3744 | 1427 | |
d62a17ae | 1428 | /* Logging update event. */ |
1429 | if (IS_RIPNG_DEBUG_EVENT) | |
1430 | zlog_debug("RIPng update timer expired!"); | |
718e3744 | 1431 | |
d62a17ae | 1432 | /* Supply routes to each interface. */ |
dde7b15b | 1433 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 1434 | ri = ifp->info; |
718e3744 | 1435 | |
d62a17ae | 1436 | if (if_is_loopback(ifp) || !if_is_up(ifp)) |
1437 | continue; | |
718e3744 | 1438 | |
d62a17ae | 1439 | if (!ri->running) |
1440 | continue; | |
718e3744 | 1441 | |
d62a17ae | 1442 | /* When passive interface is specified, suppress announce to the |
1443 | interface. */ | |
1444 | if (ri->passive) | |
1445 | continue; | |
718e3744 | 1446 | |
1e20238a | 1447 | #ifdef RIPNG_ADVANCED |
d62a17ae | 1448 | if (ri->ri_send == RIPNG_SEND_OFF) { |
1449 | if (IS_RIPNG_DEBUG_EVENT) | |
1450 | zlog_debug( | |
1451 | "[Event] RIPng send to if %d is suppressed by config", | |
1452 | ifp->ifindex); | |
1453 | continue; | |
1454 | } | |
718e3744 | 1455 | #endif /* RIPNG_ADVANCED */ |
1456 | ||
d62a17ae | 1457 | ripng_output_process(ifp, NULL, ripng_all_route); |
1458 | } | |
718e3744 | 1459 | |
d62a17ae | 1460 | /* Triggered updates may be suppressed if a regular update is due by |
1461 | the time the triggered update would be sent. */ | |
b3d6bc6e | 1462 | thread_cancel(&ripng->t_triggered_interval); |
d62a17ae | 1463 | ripng->trigger = 0; |
718e3744 | 1464 | |
d62a17ae | 1465 | /* Reset flush event. */ |
5c84b9a5 | 1466 | ripng_event(ripng, RIPNG_UPDATE_EVENT, 0); |
718e3744 | 1467 | |
d62a17ae | 1468 | return 0; |
718e3744 | 1469 | } |
1470 | ||
1471 | /* Triggered update interval timer. */ | |
d62a17ae | 1472 | static int ripng_triggered_interval(struct thread *t) |
718e3744 | 1473 | { |
5c84b9a5 RW |
1474 | struct ripng *ripng = THREAD_ARG(t); |
1475 | ||
d62a17ae | 1476 | ripng->t_triggered_interval = NULL; |
718e3744 | 1477 | |
d62a17ae | 1478 | if (ripng->trigger) { |
1479 | ripng->trigger = 0; | |
1480 | ripng_triggered_update(t); | |
1481 | } | |
1482 | return 0; | |
1483 | } | |
718e3744 | 1484 | |
1485 | /* Execute triggered update. */ | |
d62a17ae | 1486 | int ripng_triggered_update(struct thread *t) |
718e3744 | 1487 | { |
5c84b9a5 | 1488 | struct ripng *ripng = THREAD_ARG(t); |
d62a17ae | 1489 | struct interface *ifp; |
1490 | struct ripng_interface *ri; | |
1491 | int interval; | |
718e3744 | 1492 | |
d62a17ae | 1493 | ripng->t_triggered_update = NULL; |
718e3744 | 1494 | |
d62a17ae | 1495 | /* Cancel interval timer. */ |
b3d6bc6e | 1496 | thread_cancel(&ripng->t_triggered_interval); |
d62a17ae | 1497 | ripng->trigger = 0; |
718e3744 | 1498 | |
d62a17ae | 1499 | /* Logging triggered update. */ |
1500 | if (IS_RIPNG_DEBUG_EVENT) | |
1501 | zlog_debug("RIPng triggered update!"); | |
718e3744 | 1502 | |
d62a17ae | 1503 | /* Split Horizon processing is done when generating triggered |
1504 | updates as well as normal updates (see section 2.6). */ | |
dde7b15b | 1505 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 1506 | ri = ifp->info; |
718e3744 | 1507 | |
d62a17ae | 1508 | if (if_is_loopback(ifp) || !if_is_up(ifp)) |
1509 | continue; | |
718e3744 | 1510 | |
d62a17ae | 1511 | if (!ri->running) |
1512 | continue; | |
718e3744 | 1513 | |
d62a17ae | 1514 | /* When passive interface is specified, suppress announce to the |
1515 | interface. */ | |
1516 | if (ri->passive) | |
1517 | continue; | |
718e3744 | 1518 | |
d62a17ae | 1519 | ripng_output_process(ifp, NULL, ripng_changed_route); |
1520 | } | |
718e3744 | 1521 | |
d62a17ae | 1522 | /* Once all of the triggered updates have been generated, the route |
1523 | change flags should be cleared. */ | |
5c84b9a5 | 1524 | ripng_clear_changed_flag(ripng); |
718e3744 | 1525 | |
d62a17ae | 1526 | /* After a triggered update is sent, a timer should be set for a |
1527 | random interval between 1 and 5 seconds. If other changes that | |
1528 | would trigger updates occur before the timer expires, a single | |
1529 | update is triggered when the timer expires. */ | |
5920b3eb | 1530 | interval = (frr_weak_random() % 5) + 1; |
718e3744 | 1531 | |
d62a17ae | 1532 | ripng->t_triggered_interval = NULL; |
5c84b9a5 | 1533 | thread_add_timer(master, ripng_triggered_interval, ripng, interval, |
d62a17ae | 1534 | &ripng->t_triggered_interval); |
718e3744 | 1535 | |
d62a17ae | 1536 | return 0; |
718e3744 | 1537 | } |
1538 | ||
1539 | /* Write routing table entry to the stream and return next index of | |
1540 | the routing table entry in the stream. */ | |
d62a17ae | 1541 | int ripng_write_rte(int num, struct stream *s, struct prefix_ipv6 *p, |
d7c0a89a | 1542 | struct in6_addr *nexthop, uint16_t tag, uint8_t metric) |
d62a17ae | 1543 | { |
1544 | /* RIPng packet header. */ | |
1545 | if (num == 0) { | |
1546 | stream_putc(s, RIPNG_RESPONSE); | |
1547 | stream_putc(s, RIPNG_V1); | |
1548 | stream_putw(s, 0); | |
1549 | } | |
718e3744 | 1550 | |
d62a17ae | 1551 | /* Write routing table entry. */ |
b575a12c A |
1552 | if (!nexthop) { |
1553 | assert(p); | |
d7c0a89a | 1554 | stream_write(s, (uint8_t *)&p->prefix, sizeof(struct in6_addr)); |
b575a12c | 1555 | } else |
d7c0a89a | 1556 | stream_write(s, (uint8_t *)nexthop, sizeof(struct in6_addr)); |
d62a17ae | 1557 | stream_putw(s, tag); |
1558 | if (p) | |
1559 | stream_putc(s, p->prefixlen); | |
1560 | else | |
1561 | stream_putc(s, 0); | |
1562 | stream_putc(s, metric); | |
718e3744 | 1563 | |
d62a17ae | 1564 | return ++num; |
718e3744 | 1565 | } |
1566 | ||
1567 | /* Send RESPONSE message to specified destination. */ | |
d62a17ae | 1568 | void ripng_output_process(struct interface *ifp, struct sockaddr_in6 *to, |
1569 | int route_type) | |
1570 | { | |
5c84b9a5 | 1571 | struct ripng *ripng; |
d62a17ae | 1572 | int ret; |
fe08ba7e | 1573 | struct agg_node *rp; |
d62a17ae | 1574 | struct ripng_info *rinfo; |
1575 | struct ripng_interface *ri; | |
1576 | struct ripng_aggregate *aggregate; | |
1577 | struct prefix_ipv6 *p; | |
1578 | struct list *ripng_rte_list; | |
1579 | struct list *list = NULL; | |
1580 | struct listnode *listnode = NULL; | |
1581 | ||
1582 | if (IS_RIPNG_DEBUG_EVENT) { | |
1583 | if (to) | |
1584 | zlog_debug("RIPng update routes to neighbor %s", | |
1585 | inet6_ntoa(to->sin6_addr)); | |
1586 | else | |
1587 | zlog_debug("RIPng update routes on interface %s", | |
1588 | ifp->name); | |
1589 | } | |
a94434b6 | 1590 | |
5c84b9a5 | 1591 | /* Get RIPng interface and instance. */ |
d62a17ae | 1592 | ri = ifp->info; |
5c84b9a5 | 1593 | ripng = ri->ripng; |
d62a17ae | 1594 | |
1595 | ripng_rte_list = ripng_rte_new(); | |
1596 | ||
fe08ba7e | 1597 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { |
d62a17ae | 1598 | if ((list = rp->info) != NULL |
1599 | && (rinfo = listgetdata(listhead(list))) != NULL | |
1600 | && rinfo->suppress == 0) { | |
1601 | /* If no route-map are applied, the RTE will be these | |
1602 | * following | |
0437e105 | 1603 | * information. |
d62a17ae | 1604 | */ |
26a3ffd6 | 1605 | p = (struct prefix_ipv6 *)agg_node_get_prefix(rp); |
d62a17ae | 1606 | rinfo->metric_out = rinfo->metric; |
1607 | rinfo->tag_out = rinfo->tag; | |
1608 | memset(&rinfo->nexthop_out, 0, | |
1609 | sizeof(rinfo->nexthop_out)); | |
1610 | /* In order to avoid some local loops, | |
1611 | * if the RIPng route has a nexthop via this interface, | |
1612 | * keep the nexthop, | |
1613 | * otherwise set it to 0. The nexthop should not be | |
1614 | * propagated | |
1615 | * beyond the local broadcast/multicast area in order | |
1616 | * to avoid an IGP multi-level recursive look-up. | |
1617 | */ | |
1618 | if (rinfo->ifindex == ifp->ifindex) | |
1619 | rinfo->nexthop_out = rinfo->nexthop; | |
1620 | ||
1621 | /* Apply output filters. */ | |
1622 | ret = ripng_filter(RIPNG_FILTER_OUT, p, ri); | |
1623 | if (ret < 0) | |
1624 | continue; | |
1625 | ||
1626 | /* Changed route only output. */ | |
1627 | if (route_type == ripng_changed_route | |
1628 | && (!(rinfo->flags & RIPNG_RTF_CHANGED))) | |
1629 | continue; | |
1630 | ||
1631 | /* Split horizon. */ | |
1632 | if (ri->split_horizon == RIPNG_SPLIT_HORIZON) { | |
1633 | /* We perform split horizon for RIPng routes. */ | |
1634 | int suppress = 0; | |
1635 | struct ripng_info *tmp_rinfo = NULL; | |
1636 | ||
1637 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
1638 | tmp_rinfo)) | |
1639 | if (tmp_rinfo->type == ZEBRA_ROUTE_RIPNG | |
1640 | && tmp_rinfo->ifindex | |
1641 | == ifp->ifindex) { | |
1642 | suppress = 1; | |
1643 | break; | |
1644 | } | |
1645 | if (suppress) | |
1646 | continue; | |
1647 | } | |
1648 | ||
1649 | /* Preparation for route-map. */ | |
1650 | rinfo->metric_set = 0; | |
1651 | /* nexthop_out, | |
1652 | * metric_out | |
1653 | * and tag_out are already initialized. | |
1654 | */ | |
1655 | ||
1656 | /* Interface route-map */ | |
1657 | if (ri->routemap[RIPNG_FILTER_OUT]) { | |
d62a17ae | 1658 | ret = route_map_apply( |
1659 | ri->routemap[RIPNG_FILTER_OUT], | |
1782514f | 1660 | (struct prefix *)p, rinfo); |
d62a17ae | 1661 | |
1662 | if (ret == RMAP_DENYMATCH) { | |
1663 | if (IS_RIPNG_DEBUG_PACKET) | |
1664 | zlog_debug( | |
e0259674 DS |
1665 | "RIPng %pFX is filtered by route-map out", |
1666 | p); | |
d62a17ae | 1667 | continue; |
1668 | } | |
1669 | } | |
1670 | ||
1671 | /* Redistribute route-map. */ | |
f9120f71 RW |
1672 | if (ripng->redist[rinfo->type].route_map.name) { |
1673 | ret = route_map_apply(ripng->redist[rinfo->type] | |
1674 | .route_map.map, | |
1675 | (struct prefix *)p, | |
1782514f | 1676 | rinfo); |
d62a17ae | 1677 | |
1678 | if (ret == RMAP_DENYMATCH) { | |
1679 | if (IS_RIPNG_DEBUG_PACKET) | |
1680 | zlog_debug( | |
e0259674 DS |
1681 | "RIPng %pFX is filtered by route-map", |
1682 | p); | |
d62a17ae | 1683 | continue; |
1684 | } | |
1685 | } | |
1686 | ||
1687 | /* When the route-map does not set metric. */ | |
1688 | if (!rinfo->metric_set) { | |
1689 | /* If the redistribute metric is set. */ | |
f9120f71 | 1690 | if (ripng->redist[rinfo->type].metric_config |
d62a17ae | 1691 | && rinfo->metric != RIPNG_METRIC_INFINITY) { |
1692 | rinfo->metric_out = | |
f9120f71 | 1693 | ripng->redist[rinfo->type] |
d62a17ae | 1694 | .metric; |
1695 | } else { | |
1696 | /* If the route is not connected or | |
1697 | localy generated | |
1698 | one, use default-metric value */ | |
1699 | if (rinfo->type != ZEBRA_ROUTE_RIPNG | |
1700 | && rinfo->type | |
1701 | != ZEBRA_ROUTE_CONNECT | |
1702 | && rinfo->metric | |
1703 | != RIPNG_METRIC_INFINITY) | |
1704 | rinfo->metric_out = | |
1705 | ripng->default_metric; | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | /* Apply offset-list */ | |
1710 | if (rinfo->metric_out != RIPNG_METRIC_INFINITY) | |
5c84b9a5 | 1711 | ripng_offset_list_apply_out(ripng, p, ifp, |
d62a17ae | 1712 | &rinfo->metric_out); |
1713 | ||
1714 | if (rinfo->metric_out > RIPNG_METRIC_INFINITY) | |
1715 | rinfo->metric_out = RIPNG_METRIC_INFINITY; | |
1716 | ||
1717 | /* Perform split-horizon with poisoned reverse | |
1718 | * for RIPng routes. | |
1719 | **/ | |
1720 | if (ri->split_horizon | |
1721 | == RIPNG_SPLIT_HORIZON_POISONED_REVERSE) { | |
1722 | struct ripng_info *tmp_rinfo = NULL; | |
1723 | ||
1724 | for (ALL_LIST_ELEMENTS_RO(list, listnode, | |
1725 | tmp_rinfo)) | |
1726 | if ((tmp_rinfo->type | |
1727 | == ZEBRA_ROUTE_RIPNG) | |
1728 | && tmp_rinfo->ifindex | |
1729 | == ifp->ifindex) | |
1730 | rinfo->metric_out = | |
1731 | RIPNG_METRIC_INFINITY; | |
1732 | } | |
1733 | ||
1734 | /* Add RTE to the list */ | |
1735 | ripng_rte_add(ripng_rte_list, p, rinfo, NULL); | |
718e3744 | 1736 | } |
a94434b6 | 1737 | |
d62a17ae | 1738 | /* Process the aggregated RTE entry */ |
1739 | if ((aggregate = rp->aggregate) != NULL && aggregate->count > 0 | |
1740 | && aggregate->suppress == 0) { | |
1741 | /* If no route-map are applied, the RTE will be these | |
1742 | * following | |
0437e105 | 1743 | * information. |
d62a17ae | 1744 | */ |
26a3ffd6 | 1745 | p = (struct prefix_ipv6 *)agg_node_get_prefix(rp); |
d62a17ae | 1746 | aggregate->metric_set = 0; |
1747 | aggregate->metric_out = aggregate->metric; | |
1748 | aggregate->tag_out = aggregate->tag; | |
1749 | memset(&aggregate->nexthop_out, 0, | |
1750 | sizeof(aggregate->nexthop_out)); | |
1751 | ||
1752 | /* Apply output filters.*/ | |
1753 | ret = ripng_filter(RIPNG_FILTER_OUT, p, ri); | |
1754 | if (ret < 0) | |
1755 | continue; | |
1756 | ||
1757 | /* Interface route-map */ | |
1758 | if (ri->routemap[RIPNG_FILTER_OUT]) { | |
d62a17ae | 1759 | struct ripng_info newinfo; |
1760 | ||
1761 | /* let's cast the aggregate structure to | |
1762 | * ripng_info */ | |
1763 | memset(&newinfo, 0, sizeof(struct ripng_info)); | |
1764 | /* the nexthop is :: */ | |
1765 | newinfo.metric = aggregate->metric; | |
1766 | newinfo.metric_out = aggregate->metric_out; | |
1767 | newinfo.tag = aggregate->tag; | |
1768 | newinfo.tag_out = aggregate->tag_out; | |
1769 | ||
1770 | ret = route_map_apply( | |
1771 | ri->routemap[RIPNG_FILTER_OUT], | |
1782514f | 1772 | (struct prefix *)p, &newinfo); |
d62a17ae | 1773 | |
1774 | if (ret == RMAP_DENYMATCH) { | |
1775 | if (IS_RIPNG_DEBUG_PACKET) | |
1776 | zlog_debug( | |
e0259674 DS |
1777 | "RIPng %pFX is filtered by route-map out", |
1778 | p); | |
d62a17ae | 1779 | continue; |
1780 | } | |
1781 | ||
1782 | aggregate->metric_out = newinfo.metric_out; | |
1783 | aggregate->tag_out = newinfo.tag_out; | |
1784 | if (IN6_IS_ADDR_LINKLOCAL(&newinfo.nexthop_out)) | |
1785 | aggregate->nexthop_out = | |
1786 | newinfo.nexthop_out; | |
1787 | } | |
1788 | ||
1789 | /* There is no redistribute routemap for the aggregated | |
1790 | * RTE */ | |
1791 | ||
1792 | /* Changed route only output. */ | |
1793 | /* XXX, vincent, in order to increase time convergence, | |
1794 | * it should be announced if a child has changed. | |
1795 | */ | |
1796 | if (route_type == ripng_changed_route) | |
1797 | continue; | |
1798 | ||
1799 | /* Apply offset-list */ | |
1800 | if (aggregate->metric_out != RIPNG_METRIC_INFINITY) | |
1801 | ripng_offset_list_apply_out( | |
5c84b9a5 | 1802 | ripng, p, ifp, &aggregate->metric_out); |
d62a17ae | 1803 | |
1804 | if (aggregate->metric_out > RIPNG_METRIC_INFINITY) | |
1805 | aggregate->metric_out = RIPNG_METRIC_INFINITY; | |
1806 | ||
1807 | /* Add RTE to the list */ | |
1808 | ripng_rte_add(ripng_rte_list, p, NULL, aggregate); | |
1809 | } | |
718e3744 | 1810 | } |
1811 | ||
d62a17ae | 1812 | /* Flush the list */ |
1813 | ripng_rte_send(ripng_rte_list, ifp, to); | |
1814 | ripng_rte_free(ripng_rte_list); | |
718e3744 | 1815 | } |
1816 | ||
5c84b9a5 RW |
1817 | struct ripng *ripng_lookup_by_vrf_id(vrf_id_t vrf_id) |
1818 | { | |
1819 | struct vrf *vrf; | |
1820 | ||
1821 | vrf = vrf_lookup_by_id(vrf_id); | |
1822 | if (!vrf) | |
1823 | return NULL; | |
1824 | ||
1825 | return vrf->info; | |
1826 | } | |
1827 | ||
dde7b15b RW |
1828 | struct ripng *ripng_lookup_by_vrf_name(const char *vrf_name) |
1829 | { | |
1830 | struct ripng ripng; | |
1831 | ||
1832 | ripng.vrf_name = (char *)vrf_name; | |
1833 | ||
1834 | return RB_FIND(ripng_instance_head, &ripng_instances, &ripng); | |
1835 | } | |
1836 | ||
718e3744 | 1837 | /* Create new RIPng instance and set it to global variable. */ |
dde7b15b | 1838 | struct ripng *ripng_create(const char *vrf_name, struct vrf *vrf, int socket) |
718e3744 | 1839 | { |
5c84b9a5 | 1840 | struct ripng *ripng; |
718e3744 | 1841 | |
d62a17ae | 1842 | /* Allocaste RIPng instance. */ |
1843 | ripng = XCALLOC(MTYPE_RIPNG, sizeof(struct ripng)); | |
dde7b15b | 1844 | ripng->vrf_name = XSTRDUP(MTYPE_RIPNG_VRF_NAME, vrf_name); |
718e3744 | 1845 | |
d62a17ae | 1846 | /* Default version and timer values. */ |
1847 | ripng->version = RIPNG_V1; | |
9a12e9e5 RW |
1848 | ripng->update_time = yang_get_default_uint32( |
1849 | "%s/timers/update-interval", RIPNG_INSTANCE); | |
1850 | ripng->timeout_time = yang_get_default_uint32( | |
1851 | "%s/timers/holddown-interval", RIPNG_INSTANCE); | |
1852 | ripng->garbage_time = yang_get_default_uint32( | |
1853 | "%s/timers/flush-interval", RIPNG_INSTANCE); | |
1854 | ripng->default_metric = | |
1855 | yang_get_default_uint8("%s/default-metric", RIPNG_INSTANCE); | |
1856 | ripng->ecmp = yang_get_default_bool("%s/allow-ecmp", RIPNG_INSTANCE); | |
d62a17ae | 1857 | |
1858 | /* Make buffer. */ | |
1859 | ripng->ibuf = stream_new(RIPNG_MAX_PACKET_SIZE * 5); | |
1860 | ripng->obuf = stream_new(RIPNG_MAX_PACKET_SIZE); | |
1861 | ||
b0ba762f | 1862 | /* Initialize RIPng data structures. */ |
fe08ba7e | 1863 | ripng->table = agg_table_init(); |
5c84b9a5 | 1864 | agg_set_table_info(ripng->table, ripng); |
ecece94c RW |
1865 | ripng->peer_list = list_new(); |
1866 | ripng->peer_list->cmp = (int (*)(void *, void *))ripng_peer_list_cmp; | |
56bf1cb2 | 1867 | ripng->peer_list->del = ripng_peer_list_del; |
b0ba762f | 1868 | ripng->enable_if = vector_init(1); |
29b94d58 | 1869 | ripng->enable_network = agg_table_init(); |
0c32404f | 1870 | ripng->passive_interface = vector_init(1); |
26c6be93 RW |
1871 | ripng->offset_list_master = list_new(); |
1872 | ripng->offset_list_master->cmp = | |
1873 | (int (*)(void *, void *))offset_list_cmp; | |
1874 | ripng->offset_list_master->del = | |
6c4c3561 | 1875 | (void (*)(void *))ripng_offset_list_free; |
dde7b15b | 1876 | ripng->distribute_ctx = distribute_list_ctx_create(vrf); |
03a38493 PG |
1877 | distribute_list_add_hook(ripng->distribute_ctx, |
1878 | ripng_distribute_update); | |
1879 | distribute_list_delete_hook(ripng->distribute_ctx, | |
1880 | ripng_distribute_update); | |
718e3744 | 1881 | |
4b23867c | 1882 | /* if rmap install. */ |
8f88441d | 1883 | ripng->if_rmap_ctx = if_rmap_ctx_create(vrf_name); |
4b23867c PG |
1884 | if_rmap_hook_add(ripng->if_rmap_ctx, ripng_if_rmap_update); |
1885 | if_rmap_hook_delete(ripng->if_rmap_ctx, ripng_if_rmap_update); | |
5c84b9a5 | 1886 | |
dde7b15b RW |
1887 | /* Enable the routing instance if possible. */ |
1888 | if (vrf && vrf_is_enabled(vrf)) | |
1889 | ripng_instance_enable(ripng, vrf, socket); | |
1890 | else { | |
1891 | ripng->vrf = NULL; | |
1892 | ripng->sock = -1; | |
5c84b9a5 RW |
1893 | } |
1894 | ||
dde7b15b RW |
1895 | RB_INSERT(ripng_instance_head, &ripng_instances, ripng); |
1896 | ||
5c84b9a5 | 1897 | return ripng; |
718e3744 | 1898 | } |
1899 | ||
a94434b6 | 1900 | /* Send RIPng request to the interface. */ |
d62a17ae | 1901 | int ripng_request(struct interface *ifp) |
718e3744 | 1902 | { |
d62a17ae | 1903 | struct rte *rte; |
1904 | struct ripng_packet ripng_packet; | |
718e3744 | 1905 | |
d62a17ae | 1906 | /* In default ripd doesn't send RIP_REQUEST to the loopback interface. |
1907 | */ | |
1908 | if (if_is_loopback(ifp)) | |
1909 | return 0; | |
a94434b6 | 1910 | |
d62a17ae | 1911 | /* If interface is down, don't send RIP packet. */ |
1912 | if (!if_is_up(ifp)) | |
1913 | return 0; | |
a94434b6 | 1914 | |
d62a17ae | 1915 | if (IS_RIPNG_DEBUG_EVENT) |
1916 | zlog_debug("RIPng send request to %s", ifp->name); | |
718e3744 | 1917 | |
d62a17ae | 1918 | memset(&ripng_packet, 0, sizeof(ripng_packet)); |
1919 | ripng_packet.command = RIPNG_REQUEST; | |
1920 | ripng_packet.version = RIPNG_V1; | |
1921 | rte = ripng_packet.rte; | |
1922 | rte->metric = RIPNG_METRIC_INFINITY; | |
718e3744 | 1923 | |
d62a17ae | 1924 | return ripng_send_packet((caddr_t)&ripng_packet, sizeof(ripng_packet), |
1925 | NULL, ifp); | |
718e3744 | 1926 | } |
1927 | ||
6b0655a2 | 1928 | |
d62a17ae | 1929 | static int ripng_update_jitter(int time) |
718e3744 | 1930 | { |
5920b3eb | 1931 | return ((frr_weak_random() % (time + 1)) - (time / 2)); |
718e3744 | 1932 | } |
1933 | ||
5c84b9a5 | 1934 | void ripng_event(struct ripng *ripng, enum ripng_event event, int sock) |
718e3744 | 1935 | { |
d62a17ae | 1936 | int jitter = 0; |
718e3744 | 1937 | |
d62a17ae | 1938 | switch (event) { |
1939 | case RIPNG_READ: | |
5c84b9a5 RW |
1940 | thread_add_read(master, ripng_read, ripng, sock, |
1941 | &ripng->t_read); | |
d62a17ae | 1942 | break; |
1943 | case RIPNG_UPDATE_EVENT: | |
b3d6bc6e MS |
1944 | thread_cancel(&ripng->t_update); |
1945 | ||
d62a17ae | 1946 | /* Update timer jitter. */ |
1947 | jitter = ripng_update_jitter(ripng->update_time); | |
1948 | ||
1949 | ripng->t_update = NULL; | |
5c84b9a5 | 1950 | thread_add_timer(master, ripng_update, ripng, |
d62a17ae | 1951 | sock ? 2 : ripng->update_time + jitter, |
1952 | &ripng->t_update); | |
1953 | break; | |
1954 | case RIPNG_TRIGGERED_UPDATE: | |
1955 | if (ripng->t_triggered_interval) | |
1956 | ripng->trigger = 1; | |
1957 | else | |
5c84b9a5 | 1958 | thread_add_event(master, ripng_triggered_update, ripng, |
d62a17ae | 1959 | 0, &ripng->t_triggered_update); |
1960 | break; | |
1961 | default: | |
1962 | break; | |
1963 | } | |
718e3744 | 1964 | } |
6b0655a2 | 1965 | |
718e3744 | 1966 | |
718e3744 | 1967 | /* Print out routes update time. */ |
d62a17ae | 1968 | static void ripng_vty_out_uptime(struct vty *vty, struct ripng_info *rinfo) |
718e3744 | 1969 | { |
d62a17ae | 1970 | time_t clock; |
a2700b50 | 1971 | struct tm tm; |
718e3744 | 1972 | #define TIME_BUF 25 |
d62a17ae | 1973 | char timebuf[TIME_BUF]; |
1974 | struct thread *thread; | |
1975 | ||
1976 | if ((thread = rinfo->t_timeout) != NULL) { | |
1977 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
1978 | gmtime_r(&clock, &tm); |
1979 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 1980 | vty_out(vty, "%5s", timebuf); |
1981 | } else if ((thread = rinfo->t_garbage_collect) != NULL) { | |
1982 | clock = thread_timer_remain_second(thread); | |
a2700b50 MS |
1983 | gmtime_r(&clock, &tm); |
1984 | strftime(timebuf, TIME_BUF, "%M:%S", &tm); | |
d62a17ae | 1985 | vty_out(vty, "%5s", timebuf); |
1986 | } | |
718e3744 | 1987 | } |
1988 | ||
d62a17ae | 1989 | static char *ripng_route_subtype_print(struct ripng_info *rinfo) |
1990 | { | |
1991 | static char str[3]; | |
1992 | memset(str, 0, 3); | |
1993 | ||
1994 | if (rinfo->suppress) | |
9736ba9e | 1995 | strlcat(str, "S", sizeof(str)); |
d62a17ae | 1996 | |
1997 | switch (rinfo->sub_type) { | |
1998 | case RIPNG_ROUTE_RTE: | |
9736ba9e | 1999 | strlcat(str, "n", sizeof(str)); |
d62a17ae | 2000 | break; |
2001 | case RIPNG_ROUTE_STATIC: | |
9736ba9e | 2002 | strlcat(str, "s", sizeof(str)); |
d62a17ae | 2003 | break; |
2004 | case RIPNG_ROUTE_DEFAULT: | |
9736ba9e | 2005 | strlcat(str, "d", sizeof(str)); |
d62a17ae | 2006 | break; |
2007 | case RIPNG_ROUTE_REDISTRIBUTE: | |
9736ba9e | 2008 | strlcat(str, "r", sizeof(str)); |
d62a17ae | 2009 | break; |
2010 | case RIPNG_ROUTE_INTERFACE: | |
9736ba9e | 2011 | strlcat(str, "i", sizeof(str)); |
d62a17ae | 2012 | break; |
2013 | default: | |
9736ba9e | 2014 | strlcat(str, "?", sizeof(str)); |
d62a17ae | 2015 | break; |
2016 | } | |
a94434b6 | 2017 | |
d62a17ae | 2018 | return str; |
a94434b6 | 2019 | } |
2020 | ||
718e3744 | 2021 | DEFUN (show_ipv6_ripng, |
2022 | show_ipv6_ripng_cmd, | |
dde7b15b | 2023 | "show ipv6 ripng [vrf NAME]", |
718e3744 | 2024 | SHOW_STR |
8d0f15fd | 2025 | IPV6_STR |
dde7b15b RW |
2026 | "Show RIPng routes\n" |
2027 | VRF_CMD_HELP_STR) | |
718e3744 | 2028 | { |
5c84b9a5 | 2029 | struct ripng *ripng; |
fe08ba7e | 2030 | struct agg_node *rp; |
d62a17ae | 2031 | struct ripng_info *rinfo; |
2032 | struct ripng_aggregate *aggregate; | |
d62a17ae | 2033 | struct list *list = NULL; |
2034 | struct listnode *listnode = NULL; | |
2035 | int len; | |
dde7b15b RW |
2036 | const char *vrf_name; |
2037 | int idx = 0; | |
d62a17ae | 2038 | |
dde7b15b RW |
2039 | if (argv_find(argv, argc, "vrf", &idx)) |
2040 | vrf_name = argv[idx + 1]->arg; | |
2041 | else | |
2042 | vrf_name = VRF_DEFAULT_NAME; | |
2043 | ||
2044 | ripng = ripng_lookup_by_vrf_name(vrf_name); | |
2045 | if (!ripng) { | |
2046 | vty_out(vty, "%% RIPng instance not found\n"); | |
2047 | return CMD_SUCCESS; | |
2048 | } | |
2049 | if (!ripng->enabled) { | |
2050 | vty_out(vty, "%% RIPng instance is disabled\n"); | |
d62a17ae | 2051 | return CMD_SUCCESS; |
dde7b15b | 2052 | } |
d62a17ae | 2053 | |
2054 | /* Header of display. */ | |
2055 | vty_out(vty, | |
2056 | "Codes: R - RIPng, C - connected, S - Static, O - OSPF, B - BGP\n" | |
2057 | "Sub-codes:\n" | |
2058 | " (n) - normal, (s) - static, (d) - default, (r) - redistribute,\n" | |
2059 | " (i) - interface, (a/S) - aggregated/Suppressed\n\n" | |
2060 | " Network Next Hop Via Metric Tag Time\n"); | |
2061 | ||
fe08ba7e | 2062 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { |
d62a17ae | 2063 | if ((aggregate = rp->aggregate) != NULL) { |
718e3744 | 2064 | #ifdef DEBUG |
26a3ffd6 DS |
2065 | vty_out(vty, "R(a) %d/%d %pRN ", aggregate->count, |
2066 | aggregate->suppress, rp); | |
718e3744 | 2067 | #else |
26a3ffd6 | 2068 | vty_out(vty, "R(a) %pRN ", rp); |
718e3744 | 2069 | #endif /* DEBUG */ |
d62a17ae | 2070 | vty_out(vty, "\n"); |
2071 | vty_out(vty, "%*s", 18, " "); | |
718e3744 | 2072 | |
d62a17ae | 2073 | vty_out(vty, "%*s", 28, " "); |
2074 | vty_out(vty, "self %2d %3" ROUTE_TAG_PRI "\n", | |
2075 | aggregate->metric, (route_tag_t)aggregate->tag); | |
2076 | } | |
718e3744 | 2077 | |
d62a17ae | 2078 | if ((list = rp->info) != NULL) |
2079 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
718e3744 | 2080 | #ifdef DEBUG |
26a3ffd6 | 2081 | vty_out(vty, "%c(%s) 0/%d %pRN ", |
d62a17ae | 2082 | zebra_route_char(rinfo->type), |
2083 | ripng_route_subtype_print(rinfo), | |
26a3ffd6 | 2084 | rinfo->suppress, rp); |
718e3744 | 2085 | #else |
26a3ffd6 | 2086 | vty_out(vty, "%c(%s) %pRN ", |
d62a17ae | 2087 | zebra_route_char(rinfo->type), |
26a3ffd6 | 2088 | ripng_route_subtype_print(rinfo), rp); |
718e3744 | 2089 | #endif /* DEBUG */ |
d62a17ae | 2090 | vty_out(vty, "\n"); |
2091 | vty_out(vty, "%*s", 18, " "); | |
2092 | len = vty_out(vty, "%s", | |
2093 | inet6_ntoa(rinfo->nexthop)); | |
2094 | ||
2095 | len = 28 - len; | |
2096 | if (len > 0) | |
51f7fe84 | 2097 | vty_out(vty, "%*s", len, " "); |
d62a17ae | 2098 | |
2099 | /* from */ | |
2100 | if ((rinfo->type == ZEBRA_ROUTE_RIPNG) | |
2101 | && (rinfo->sub_type == RIPNG_ROUTE_RTE)) { | |
2102 | len = vty_out( | |
2103 | vty, "%s", | |
dde7b15b RW |
2104 | ifindex2ifname( |
2105 | rinfo->ifindex, | |
2106 | ripng->vrf->vrf_id)); | |
d62a17ae | 2107 | } else if (rinfo->metric |
2108 | == RIPNG_METRIC_INFINITY) { | |
2109 | len = vty_out(vty, "kill"); | |
2110 | } else | |
2111 | len = vty_out(vty, "self"); | |
2112 | ||
2113 | len = 9 - len; | |
2114 | if (len > 0) | |
2115 | vty_out(vty, "%*s", len, " "); | |
2116 | ||
2117 | vty_out(vty, " %2d %3" ROUTE_TAG_PRI " ", | |
2118 | rinfo->metric, (route_tag_t)rinfo->tag); | |
2119 | ||
2120 | /* time */ | |
2121 | if ((rinfo->type == ZEBRA_ROUTE_RIPNG) | |
2122 | && (rinfo->sub_type == RIPNG_ROUTE_RTE)) { | |
2123 | /* RTE from remote RIP routers */ | |
2124 | ripng_vty_out_uptime(vty, rinfo); | |
2125 | } else if (rinfo->metric | |
2126 | == RIPNG_METRIC_INFINITY) { | |
2127 | /* poisonous reversed routes (gc) */ | |
2128 | ripng_vty_out_uptime(vty, rinfo); | |
2129 | } | |
2130 | ||
2131 | vty_out(vty, "\n"); | |
2132 | } | |
718e3744 | 2133 | } |
718e3744 | 2134 | |
d62a17ae | 2135 | return CMD_SUCCESS; |
718e3744 | 2136 | } |
2137 | ||
a94434b6 | 2138 | DEFUN (show_ipv6_ripng_status, |
2139 | show_ipv6_ripng_status_cmd, | |
dde7b15b | 2140 | "show ipv6 ripng [vrf NAME] status", |
a94434b6 | 2141 | SHOW_STR |
8d0f15fd | 2142 | IPV6_STR |
a94434b6 | 2143 | "Show RIPng routes\n" |
dde7b15b | 2144 | VRF_CMD_HELP_STR |
a94434b6 | 2145 | "IPv6 routing protocol process parameters and statistics\n") |
2146 | { | |
5c84b9a5 | 2147 | struct ripng *ripng; |
d62a17ae | 2148 | struct interface *ifp; |
dde7b15b RW |
2149 | const char *vrf_name; |
2150 | int idx = 0; | |
a94434b6 | 2151 | |
dde7b15b RW |
2152 | if (argv_find(argv, argc, "vrf", &idx)) |
2153 | vrf_name = argv[idx + 1]->arg; | |
2154 | else | |
2155 | vrf_name = VRF_DEFAULT_NAME; | |
2156 | ||
2157 | ripng = ripng_lookup_by_vrf_name(vrf_name); | |
2158 | if (!ripng) { | |
2159 | vty_out(vty, "%% RIPng instance not found\n"); | |
2160 | return CMD_SUCCESS; | |
2161 | } | |
2162 | if (!ripng->enabled) { | |
2163 | vty_out(vty, "%% RIPng instance is disabled\n"); | |
d62a17ae | 2164 | return CMD_SUCCESS; |
dde7b15b | 2165 | } |
a94434b6 | 2166 | |
d62a17ae | 2167 | vty_out(vty, "Routing Protocol is \"RIPng\"\n"); |
f8981ec5 | 2168 | vty_out(vty, " Sending updates every %u seconds with +/-50%%,", |
d62a17ae | 2169 | ripng->update_time); |
2170 | vty_out(vty, " next due in %lu seconds\n", | |
2171 | thread_timer_remain_second(ripng->t_update)); | |
f8981ec5 RW |
2172 | vty_out(vty, " Timeout after %u seconds,", ripng->timeout_time); |
2173 | vty_out(vty, " garbage collect after %u seconds\n", | |
d62a17ae | 2174 | ripng->garbage_time); |
a94434b6 | 2175 | |
d62a17ae | 2176 | /* Filtering status show. */ |
03a38493 | 2177 | config_show_distribute(vty, ripng->distribute_ctx); |
a94434b6 | 2178 | |
d62a17ae | 2179 | /* Default metric information. */ |
2180 | vty_out(vty, " Default redistribution metric is %d\n", | |
2181 | ripng->default_metric); | |
a94434b6 | 2182 | |
d62a17ae | 2183 | /* Redistribute information. */ |
2184 | vty_out(vty, " Redistributing:"); | |
5c84b9a5 | 2185 | ripng_redistribute_write(vty, ripng); |
d62a17ae | 2186 | vty_out(vty, "\n"); |
a94434b6 | 2187 | |
d62a17ae | 2188 | vty_out(vty, " Default version control: send version %d,", |
2189 | ripng->version); | |
2190 | vty_out(vty, " receive version %d \n", ripng->version); | |
a94434b6 | 2191 | |
d62a17ae | 2192 | vty_out(vty, " Interface Send Recv\n"); |
a94434b6 | 2193 | |
dde7b15b | 2194 | FOR_ALL_INTERFACES (ripng->vrf, ifp) { |
d62a17ae | 2195 | struct ripng_interface *ri; |
2196 | ||
2197 | ri = ifp->info; | |
a94434b6 | 2198 | |
d62a17ae | 2199 | if (ri->enable_network || ri->enable_interface) { |
a94434b6 | 2200 | |
d62a17ae | 2201 | vty_out(vty, " %-17s%-3d %-3d\n", ifp->name, |
2202 | ripng->version, ripng->version); | |
2203 | } | |
a94434b6 | 2204 | } |
a94434b6 | 2205 | |
d62a17ae | 2206 | vty_out(vty, " Routing for Networks:\n"); |
5c84b9a5 | 2207 | ripng_network_write(vty, ripng); |
a94434b6 | 2208 | |
d62a17ae | 2209 | vty_out(vty, " Routing Information Sources:\n"); |
2210 | vty_out(vty, | |
2211 | " Gateway BadPackets BadRoutes Distance Last Update\n"); | |
5c84b9a5 | 2212 | ripng_peer_display(vty, ripng); |
a94434b6 | 2213 | |
d62a17ae | 2214 | return CMD_SUCCESS; |
a94434b6 | 2215 | } |
2216 | ||
fac76f9c | 2217 | /* Update ECMP routes to zebra when ECMP is disabled. */ |
5c84b9a5 | 2218 | void ripng_ecmp_disable(struct ripng *ripng) |
d62a17ae | 2219 | { |
fe08ba7e | 2220 | struct agg_node *rp; |
d62a17ae | 2221 | struct ripng_info *rinfo, *tmp_rinfo; |
2222 | struct list *list; | |
2223 | struct listnode *node, *nextnode; | |
2224 | ||
2225 | if (!ripng) | |
2226 | return; | |
2227 | ||
fe08ba7e | 2228 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) |
d62a17ae | 2229 | if ((list = rp->info) != NULL && listcount(list) > 1) { |
2230 | rinfo = listgetdata(listhead(list)); | |
2231 | if (!ripng_route_rte(rinfo)) | |
2232 | continue; | |
2233 | ||
2234 | /* Drop all other entries, except the first one. */ | |
2235 | for (ALL_LIST_ELEMENTS(list, node, nextnode, tmp_rinfo)) | |
2236 | if (tmp_rinfo != rinfo) { | |
2237 | RIPNG_TIMER_OFF(tmp_rinfo->t_timeout); | |
2238 | RIPNG_TIMER_OFF( | |
2239 | tmp_rinfo->t_garbage_collect); | |
2240 | list_delete_node(list, node); | |
2241 | ripng_info_free(tmp_rinfo); | |
2242 | } | |
2243 | ||
2244 | /* Update zebra. */ | |
5c84b9a5 | 2245 | ripng_zebra_ipv6_add(ripng, rp); |
d62a17ae | 2246 | |
2247 | /* Set the route change flag. */ | |
2248 | SET_FLAG(rinfo->flags, RIPNG_RTF_CHANGED); | |
2249 | ||
2250 | /* Signal the output process to trigger an update. */ | |
5c84b9a5 | 2251 | ripng_event(ripng, RIPNG_TRIGGERED_UPDATE, 0); |
d62a17ae | 2252 | } |
fac76f9c FL |
2253 | } |
2254 | ||
718e3744 | 2255 | /* RIPng configuration write function. */ |
d62a17ae | 2256 | static int ripng_config_write(struct vty *vty) |
2257 | { | |
dde7b15b | 2258 | struct ripng *ripng; |
d62a17ae | 2259 | int write = 0; |
d62a17ae | 2260 | |
dde7b15b RW |
2261 | RB_FOREACH(ripng, ripng_instance_head, &ripng_instances) { |
2262 | char xpath[XPATH_MAXLEN]; | |
2263 | struct lyd_node *dnode; | |
2264 | ||
2265 | snprintf(xpath, sizeof(xpath), | |
2266 | "/frr-ripngd:ripngd/instance[vrf='%s']", | |
2267 | ripng->vrf_name); | |
2268 | ||
2269 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
2270 | assert(dnode); | |
d62a17ae | 2271 | |
5c84b9a5 | 2272 | nb_cli_show_dnode_cmds(vty, dnode, false); |
718e3744 | 2273 | |
dde7b15b | 2274 | config_write_distribute(vty, ripng->distribute_ctx); |
4b23867c | 2275 | config_write_if_rmap(vty, ripng->if_rmap_ctx); |
718e3744 | 2276 | |
9a12e9e5 | 2277 | write = 1; |
d62a17ae | 2278 | } |
9a12e9e5 | 2279 | |
d62a17ae | 2280 | return write; |
718e3744 | 2281 | } |
2282 | ||
612c2c15 | 2283 | static int ripng_config_write(struct vty *vty); |
718e3744 | 2284 | /* RIPng node structure. */ |
d62a17ae | 2285 | static struct cmd_node cmd_ripng_node = { |
f4b8291f | 2286 | .name = "ripng", |
62b346ee | 2287 | .node = RIPNG_NODE, |
24389580 | 2288 | .parent_node = CONFIG_NODE, |
62b346ee | 2289 | .prompt = "%s(config-router)# ", |
612c2c15 | 2290 | .config_write = ripng_config_write, |
718e3744 | 2291 | }; |
2292 | ||
03a38493 PG |
2293 | static void ripng_distribute_update(struct distribute_ctx *ctx, |
2294 | struct distribute *dist) | |
d62a17ae | 2295 | { |
2296 | struct interface *ifp; | |
2297 | struct ripng_interface *ri; | |
2298 | struct access_list *alist; | |
2299 | struct prefix_list *plist; | |
2300 | ||
dde7b15b | 2301 | if (!ctx->vrf || !dist->ifname) |
d62a17ae | 2302 | return; |
2303 | ||
a36898e7 | 2304 | ifp = if_lookup_by_name(dist->ifname, ctx->vrf->vrf_id); |
d62a17ae | 2305 | if (ifp == NULL) |
2306 | return; | |
2307 | ||
2308 | ri = ifp->info; | |
2309 | ||
2310 | if (dist->list[DISTRIBUTE_V6_IN]) { | |
2311 | alist = access_list_lookup(AFI_IP6, | |
2312 | dist->list[DISTRIBUTE_V6_IN]); | |
2313 | if (alist) | |
2314 | ri->list[RIPNG_FILTER_IN] = alist; | |
2315 | else | |
2316 | ri->list[RIPNG_FILTER_IN] = NULL; | |
2317 | } else | |
2318 | ri->list[RIPNG_FILTER_IN] = NULL; | |
2319 | ||
2320 | if (dist->list[DISTRIBUTE_V6_OUT]) { | |
2321 | alist = access_list_lookup(AFI_IP6, | |
2322 | dist->list[DISTRIBUTE_V6_OUT]); | |
2323 | if (alist) | |
2324 | ri->list[RIPNG_FILTER_OUT] = alist; | |
2325 | else | |
2326 | ri->list[RIPNG_FILTER_OUT] = NULL; | |
2327 | } else | |
2328 | ri->list[RIPNG_FILTER_OUT] = NULL; | |
2329 | ||
2330 | if (dist->prefix[DISTRIBUTE_V6_IN]) { | |
2331 | plist = prefix_list_lookup(AFI_IP6, | |
2332 | dist->prefix[DISTRIBUTE_V6_IN]); | |
2333 | if (plist) | |
2334 | ri->prefix[RIPNG_FILTER_IN] = plist; | |
2335 | else | |
2336 | ri->prefix[RIPNG_FILTER_IN] = NULL; | |
2337 | } else | |
2338 | ri->prefix[RIPNG_FILTER_IN] = NULL; | |
2339 | ||
2340 | if (dist->prefix[DISTRIBUTE_V6_OUT]) { | |
2341 | plist = prefix_list_lookup(AFI_IP6, | |
2342 | dist->prefix[DISTRIBUTE_V6_OUT]); | |
2343 | if (plist) | |
2344 | ri->prefix[RIPNG_FILTER_OUT] = plist; | |
2345 | else | |
2346 | ri->prefix[RIPNG_FILTER_OUT] = NULL; | |
2347 | } else | |
2348 | ri->prefix[RIPNG_FILTER_OUT] = NULL; | |
2349 | } | |
2350 | ||
2351 | void ripng_distribute_update_interface(struct interface *ifp) | |
2352 | { | |
dde7b15b RW |
2353 | struct ripng_interface *ri = ifp->info; |
2354 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 2355 | struct distribute *dist; |
2356 | ||
03a38493 PG |
2357 | if (!ripng) |
2358 | return; | |
2359 | dist = distribute_lookup(ripng->distribute_ctx, ifp->name); | |
d62a17ae | 2360 | if (dist) |
03a38493 | 2361 | ripng_distribute_update(ripng->distribute_ctx, dist); |
718e3744 | 2362 | } |
2363 | ||
2364 | /* Update all interface's distribute list. */ | |
d62a17ae | 2365 | static void ripng_distribute_update_all(struct prefix_list *notused) |
718e3744 | 2366 | { |
f4e14fdb | 2367 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 2368 | struct interface *ifp; |
718e3744 | 2369 | |
451fda4f | 2370 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 2371 | ripng_distribute_update_interface(ifp); |
718e3744 | 2372 | } |
c9e52be3 | 2373 | |
d62a17ae | 2374 | static void ripng_distribute_update_all_wrapper(struct access_list *notused) |
c9e52be3 | 2375 | { |
d62a17ae | 2376 | ripng_distribute_update_all(NULL); |
c9e52be3 | 2377 | } |
6b0655a2 | 2378 | |
a94434b6 | 2379 | /* delete all the added ripng routes. */ |
5c84b9a5 | 2380 | void ripng_clean(struct ripng *ripng) |
d62a17ae | 2381 | { |
eb6b3885 IR |
2382 | ripng_interface_clean(ripng); |
2383 | ||
dde7b15b RW |
2384 | if (ripng->enabled) |
2385 | ripng_instance_disable(ripng); | |
a9caf6e9 RW |
2386 | |
2387 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
f9120f71 RW |
2388 | if (ripng->redist[i].route_map.name) |
2389 | free(ripng->redist[i].route_map.name); | |
a94434b6 | 2390 | |
a9caf6e9 | 2391 | agg_table_finish(ripng->table); |
56bf1cb2 | 2392 | list_delete(&ripng->peer_list); |
a9caf6e9 | 2393 | distribute_list_delete(&ripng->distribute_ctx); |
8f88441d | 2394 | if_rmap_ctx_delete(ripng->if_rmap_ctx); |
0581e54d | 2395 | |
a9caf6e9 RW |
2396 | stream_free(ripng->ibuf); |
2397 | stream_free(ripng->obuf); | |
a94434b6 | 2398 | |
5c84b9a5 RW |
2399 | ripng_clean_network(ripng); |
2400 | ripng_passive_interface_clean(ripng); | |
b0ba762f | 2401 | vector_free(ripng->enable_if); |
29b94d58 | 2402 | agg_table_finish(ripng->enable_network); |
0c32404f | 2403 | vector_free(ripng->passive_interface); |
26c6be93 | 2404 | list_delete(&ripng->offset_list_master); |
5c84b9a5 | 2405 | |
dde7b15b RW |
2406 | RB_REMOVE(ripng_instance_head, &ripng_instances, ripng); |
2407 | XFREE(MTYPE_RIPNG_VRF_NAME, ripng->vrf_name); | |
a9caf6e9 | 2408 | XFREE(MTYPE_RIPNG, ripng); |
a94434b6 | 2409 | } |
2410 | ||
4b23867c PG |
2411 | static void ripng_if_rmap_update(struct if_rmap_ctx *ctx, |
2412 | struct if_rmap *if_rmap) | |
718e3744 | 2413 | { |
aec0d756 | 2414 | struct interface *ifp = NULL; |
d62a17ae | 2415 | struct ripng_interface *ri; |
2416 | struct route_map *rmap; | |
aec0d756 | 2417 | struct vrf *vrf = NULL; |
718e3744 | 2418 | |
aec0d756 PG |
2419 | if (ctx->name) |
2420 | vrf = vrf_lookup_by_name(ctx->name); | |
2421 | if (vrf) | |
a36898e7 | 2422 | ifp = if_lookup_by_name(if_rmap->ifname, vrf->vrf_id); |
d62a17ae | 2423 | if (ifp == NULL) |
2424 | return; | |
718e3744 | 2425 | |
d62a17ae | 2426 | ri = ifp->info; |
718e3744 | 2427 | |
d62a17ae | 2428 | if (if_rmap->routemap[IF_RMAP_IN]) { |
2429 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_IN]); | |
2430 | if (rmap) | |
2431 | ri->routemap[IF_RMAP_IN] = rmap; | |
2432 | else | |
2433 | ri->routemap[IF_RMAP_IN] = NULL; | |
2434 | } else | |
2435 | ri->routemap[RIPNG_FILTER_IN] = NULL; | |
718e3744 | 2436 | |
d62a17ae | 2437 | if (if_rmap->routemap[IF_RMAP_OUT]) { |
2438 | rmap = route_map_lookup_by_name(if_rmap->routemap[IF_RMAP_OUT]); | |
2439 | if (rmap) | |
2440 | ri->routemap[IF_RMAP_OUT] = rmap; | |
2441 | else | |
2442 | ri->routemap[IF_RMAP_OUT] = NULL; | |
2443 | } else | |
2444 | ri->routemap[RIPNG_FILTER_OUT] = NULL; | |
718e3744 | 2445 | } |
2446 | ||
d62a17ae | 2447 | void ripng_if_rmap_update_interface(struct interface *ifp) |
718e3744 | 2448 | { |
8f88441d RW |
2449 | struct ripng_interface *ri = ifp->info; |
2450 | struct ripng *ripng = ri->ripng; | |
d62a17ae | 2451 | struct if_rmap *if_rmap; |
4b23867c | 2452 | struct if_rmap_ctx *ctx; |
718e3744 | 2453 | |
4b23867c PG |
2454 | if (!ripng) |
2455 | return; | |
2456 | ctx = ripng->if_rmap_ctx; | |
2457 | if (!ctx) | |
2458 | return; | |
2459 | if_rmap = if_rmap_lookup(ctx, ifp->name); | |
d62a17ae | 2460 | if (if_rmap) |
4b23867c | 2461 | ripng_if_rmap_update(ctx, if_rmap); |
718e3744 | 2462 | } |
2463 | ||
5c84b9a5 | 2464 | static void ripng_routemap_update_redistribute(struct ripng *ripng) |
718e3744 | 2465 | { |
5c84b9a5 | 2466 | for (int i = 0; i < ZEBRA_ROUTE_MAX; i++) { |
8f88441d | 2467 | if (ripng->redist[i].route_map.name) { |
f9120f71 RW |
2468 | ripng->redist[i].route_map.map = |
2469 | route_map_lookup_by_name( | |
2470 | ripng->redist[i].route_map.name); | |
8f88441d RW |
2471 | route_map_counter_increment( |
2472 | ripng->redist[i].route_map.map); | |
d62a17ae | 2473 | } |
718e3744 | 2474 | } |
718e3744 | 2475 | } |
2476 | ||
d62a17ae | 2477 | static void ripng_routemap_update(const char *unused) |
718e3744 | 2478 | { |
f4e14fdb | 2479 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
5c84b9a5 | 2480 | struct ripng *ripng; |
d62a17ae | 2481 | struct interface *ifp; |
718e3744 | 2482 | |
451fda4f | 2483 | FOR_ALL_INTERFACES (vrf, ifp) |
d62a17ae | 2484 | ripng_if_rmap_update_interface(ifp); |
718e3744 | 2485 | |
5c84b9a5 RW |
2486 | ripng = vrf->info; |
2487 | if (ripng) | |
2488 | ripng_routemap_update_redistribute(ripng); | |
718e3744 | 2489 | } |
2490 | ||
dde7b15b RW |
2491 | /* Link RIPng instance to VRF. */ |
2492 | static void ripng_vrf_link(struct ripng *ripng, struct vrf *vrf) | |
2493 | { | |
2494 | struct interface *ifp; | |
2495 | ||
2496 | ripng->vrf = vrf; | |
2497 | ripng->distribute_ctx->vrf = vrf; | |
2498 | vrf->info = ripng; | |
2499 | ||
2500 | FOR_ALL_INTERFACES (vrf, ifp) | |
2501 | ripng_interface_sync(ifp); | |
2502 | } | |
2503 | ||
2504 | /* Unlink RIPng instance from VRF. */ | |
2505 | static void ripng_vrf_unlink(struct ripng *ripng, struct vrf *vrf) | |
2506 | { | |
2507 | struct interface *ifp; | |
2508 | ||
2509 | ripng->vrf = NULL; | |
2510 | ripng->distribute_ctx->vrf = NULL; | |
2511 | vrf->info = NULL; | |
2512 | ||
2513 | FOR_ALL_INTERFACES (vrf, ifp) | |
2514 | ripng_interface_sync(ifp); | |
2515 | } | |
2516 | ||
2517 | static void ripng_instance_enable(struct ripng *ripng, struct vrf *vrf, | |
2518 | int sock) | |
2519 | { | |
2520 | ripng->sock = sock; | |
2521 | ||
2522 | ripng_vrf_link(ripng, vrf); | |
2523 | ripng->enabled = true; | |
2524 | ||
f9120f71 RW |
2525 | /* Resend all redistribute requests. */ |
2526 | ripng_redistribute_enable(ripng); | |
2527 | ||
dde7b15b RW |
2528 | /* Create read and timer thread. */ |
2529 | ripng_event(ripng, RIPNG_READ, ripng->sock); | |
2530 | ripng_event(ripng, RIPNG_UPDATE_EVENT, 1); | |
2531 | ||
2532 | ripng_zebra_vrf_register(vrf); | |
2533 | } | |
2534 | ||
2535 | static void ripng_instance_disable(struct ripng *ripng) | |
2536 | { | |
2537 | struct vrf *vrf = ripng->vrf; | |
2538 | struct agg_node *rp; | |
2539 | ||
2540 | /* Clear RIPng routes */ | |
2541 | for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) { | |
2542 | struct ripng_aggregate *aggregate; | |
2543 | struct list *list; | |
2544 | ||
2545 | if ((list = rp->info) != NULL) { | |
2546 | struct ripng_info *rinfo; | |
2547 | struct listnode *listnode; | |
2548 | ||
2549 | rinfo = listgetdata(listhead(list)); | |
2550 | if (ripng_route_rte(rinfo)) | |
2551 | ripng_zebra_ipv6_delete(ripng, rp); | |
2552 | ||
2553 | for (ALL_LIST_ELEMENTS_RO(list, listnode, rinfo)) { | |
2554 | RIPNG_TIMER_OFF(rinfo->t_timeout); | |
2555 | RIPNG_TIMER_OFF(rinfo->t_garbage_collect); | |
2556 | ripng_info_free(rinfo); | |
2557 | } | |
2558 | list_delete(&list); | |
2559 | rp->info = NULL; | |
2560 | agg_unlock_node(rp); | |
2561 | } | |
2562 | ||
2563 | if ((aggregate = rp->aggregate) != NULL) { | |
2564 | ripng_aggregate_free(aggregate); | |
2565 | rp->aggregate = NULL; | |
2566 | agg_unlock_node(rp); | |
2567 | } | |
2568 | } | |
2569 | ||
f9120f71 RW |
2570 | /* Flush all redistribute requests. */ |
2571 | ripng_redistribute_disable(ripng); | |
2572 | ||
dde7b15b RW |
2573 | /* Cancel the RIPng timers */ |
2574 | RIPNG_TIMER_OFF(ripng->t_update); | |
2575 | RIPNG_TIMER_OFF(ripng->t_triggered_update); | |
2576 | RIPNG_TIMER_OFF(ripng->t_triggered_interval); | |
2577 | ||
2578 | /* Cancel the read thread */ | |
b3d6bc6e | 2579 | thread_cancel(&ripng->t_read); |
dde7b15b RW |
2580 | |
2581 | /* Close the RIPng socket */ | |
2582 | if (ripng->sock >= 0) { | |
2583 | close(ripng->sock); | |
2584 | ripng->sock = -1; | |
2585 | } | |
2586 | ||
2587 | /* Clear existing peers. */ | |
2588 | list_delete_all_node(ripng->peer_list); | |
2589 | ||
2590 | ripng_zebra_vrf_deregister(vrf); | |
2591 | ||
2592 | ripng_vrf_unlink(ripng, vrf); | |
2593 | ripng->enabled = false; | |
2594 | } | |
2595 | ||
2596 | static int ripng_vrf_new(struct vrf *vrf) | |
2597 | { | |
2598 | if (IS_RIPNG_DEBUG_EVENT) | |
2599 | zlog_debug("%s: VRF created: %s(%u)", __func__, vrf->name, | |
2600 | vrf->vrf_id); | |
2601 | ||
2602 | return 0; | |
2603 | } | |
2604 | ||
2605 | static int ripng_vrf_delete(struct vrf *vrf) | |
2606 | { | |
2607 | if (IS_RIPNG_DEBUG_EVENT) | |
2608 | zlog_debug("%s: VRF deleted: %s(%u)", __func__, vrf->name, | |
2609 | vrf->vrf_id); | |
2610 | ||
2611 | return 0; | |
2612 | } | |
2613 | ||
2614 | static int ripng_vrf_enable(struct vrf *vrf) | |
2615 | { | |
2616 | struct ripng *ripng; | |
2617 | int socket; | |
2618 | ||
2619 | ripng = ripng_lookup_by_vrf_name(vrf->name); | |
be2bad2e PG |
2620 | if (!ripng) { |
2621 | char *old_vrf_name = NULL; | |
2622 | ||
2623 | ripng = (struct ripng *)vrf->info; | |
2624 | if (!ripng) | |
2625 | return 0; | |
2626 | /* update vrf name */ | |
2627 | if (ripng->vrf_name) | |
2628 | old_vrf_name = ripng->vrf_name; | |
2629 | ripng->vrf_name = XSTRDUP(MTYPE_RIPNG_VRF_NAME, vrf->name); | |
2630 | /* | |
2631 | * HACK: Change the RIPng VRF in the running configuration directly, | |
2632 | * bypassing the northbound layer. This is necessary to avoid deleting | |
2633 | * the RIPng and readding it in the new VRF, which would have | |
2634 | * several implications. | |
2635 | */ | |
2636 | if (yang_module_find("frr-ripngd") && old_vrf_name) { | |
2637 | struct lyd_node *ripng_dnode; | |
3704ff56 IR |
2638 | char oldpath[XPATH_MAXLEN]; |
2639 | char newpath[XPATH_MAXLEN]; | |
be2bad2e | 2640 | |
8685be73 RW |
2641 | ripng_dnode = yang_dnode_get( |
2642 | running_config->dnode, | |
2643 | "/frr-ripngd:ripngd/instance[vrf='%s']/vrf", | |
2644 | old_vrf_name); | |
2645 | if (ripng_dnode) { | |
3704ff56 IR |
2646 | yang_dnode_get_path(ripng_dnode->parent, oldpath, |
2647 | sizeof(oldpath)); | |
8685be73 | 2648 | yang_dnode_change_leaf(ripng_dnode, vrf->name); |
3704ff56 IR |
2649 | yang_dnode_get_path(ripng_dnode->parent, newpath, |
2650 | sizeof(newpath)); | |
2651 | nb_running_move_tree(oldpath, newpath); | |
8685be73 | 2652 | running_config->version++; |
be2bad2e | 2653 | } |
be2bad2e | 2654 | } |
e1b36e13 | 2655 | XFREE(MTYPE_RIPNG_VRF_NAME, old_vrf_name); |
be2bad2e PG |
2656 | } |
2657 | ||
2658 | if (ripng->enabled) | |
dde7b15b RW |
2659 | return 0; |
2660 | ||
2661 | if (IS_RIPNG_DEBUG_EVENT) | |
2662 | zlog_debug("%s: VRF %s(%u) enabled", __func__, vrf->name, | |
2663 | vrf->vrf_id); | |
2664 | ||
2665 | /* Activate the VRF RIPng instance. */ | |
be2bad2e PG |
2666 | socket = ripng_make_socket(vrf); |
2667 | if (socket < 0) | |
2668 | return -1; | |
dde7b15b | 2669 | |
be2bad2e | 2670 | ripng_instance_enable(ripng, vrf, socket); |
dde7b15b RW |
2671 | |
2672 | return 0; | |
2673 | } | |
2674 | ||
2675 | static int ripng_vrf_disable(struct vrf *vrf) | |
2676 | { | |
2677 | struct ripng *ripng; | |
2678 | ||
2679 | ripng = ripng_lookup_by_vrf_name(vrf->name); | |
2680 | if (!ripng || !ripng->enabled) | |
2681 | return 0; | |
2682 | ||
2683 | if (IS_RIPNG_DEBUG_EVENT) | |
2684 | zlog_debug("%s: VRF %s(%u) disabled", __func__, vrf->name, | |
2685 | vrf->vrf_id); | |
2686 | ||
2687 | /* Deactivate the VRF RIPng instance. */ | |
2688 | if (ripng->enabled) | |
2689 | ripng_instance_disable(ripng); | |
2690 | ||
2691 | return 0; | |
2692 | } | |
2693 | ||
2694 | void ripng_vrf_init(void) | |
2695 | { | |
2696 | vrf_init(ripng_vrf_new, ripng_vrf_enable, ripng_vrf_disable, | |
66bc1c49 | 2697 | ripng_vrf_delete, ripng_vrf_enable); |
dde7b15b RW |
2698 | } |
2699 | ||
2700 | void ripng_vrf_terminate(void) | |
2701 | { | |
2702 | vrf_terminate(); | |
2703 | } | |
2704 | ||
718e3744 | 2705 | /* Initialize ripng structure and set commands. */ |
4d762f26 | 2706 | void ripng_init(void) |
718e3744 | 2707 | { |
d62a17ae | 2708 | /* Install RIPNG_NODE. */ |
612c2c15 | 2709 | install_node(&cmd_ripng_node); |
718e3744 | 2710 | |
d62a17ae | 2711 | /* Install ripng commands. */ |
2712 | install_element(VIEW_NODE, &show_ipv6_ripng_cmd); | |
2713 | install_element(VIEW_NODE, &show_ipv6_ripng_status_cmd); | |
718e3744 | 2714 | |
d62a17ae | 2715 | install_default(RIPNG_NODE); |
718e3744 | 2716 | |
d62a17ae | 2717 | ripng_if_init(); |
2718 | ripng_debug_init(); | |
718e3744 | 2719 | |
d62a17ae | 2720 | /* Access list install. */ |
2721 | access_list_init(); | |
2722 | access_list_add_hook(ripng_distribute_update_all_wrapper); | |
2723 | access_list_delete_hook(ripng_distribute_update_all_wrapper); | |
718e3744 | 2724 | |
d62a17ae | 2725 | /* Prefix list initialize.*/ |
2726 | prefix_list_init(); | |
2727 | prefix_list_add_hook(ripng_distribute_update_all); | |
2728 | prefix_list_delete_hook(ripng_distribute_update_all); | |
718e3744 | 2729 | |
d62a17ae | 2730 | /* Distribute list install. */ |
2731 | distribute_list_init(RIPNG_NODE); | |
718e3744 | 2732 | |
d62a17ae | 2733 | /* Route-map for interface. */ |
2734 | ripng_route_map_init(); | |
a94434b6 | 2735 | |
d62a17ae | 2736 | route_map_add_hook(ripng_routemap_update); |
2737 | route_map_delete_hook(ripng_routemap_update); | |
718e3744 | 2738 | |
d62a17ae | 2739 | if_rmap_init(RIPNG_NODE); |
718e3744 | 2740 | } |