File: | src/usr.sbin/route6d/route6d.c |
Warning: | line 2944, column 27 Assigned value is garbage or undefined |
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1 | /* $OpenBSD: route6d.c,v 1.100 2020/12/29 19:48:27 benno Exp $ */ | |||
2 | /* $KAME: route6d.c,v 1.111 2006/10/25 06:38:13 jinmei Exp $ */ | |||
3 | ||||
4 | /* | |||
5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. | |||
6 | * All rights reserved. | |||
7 | * | |||
8 | * Redistribution and use in source and binary forms, with or without | |||
9 | * modification, are permitted provided that the following conditions | |||
10 | * are met: | |||
11 | * 1. Redistributions of source code must retain the above copyright | |||
12 | * notice, this list of conditions and the following disclaimer. | |||
13 | * 2. Redistributions in binary form must reproduce the above copyright | |||
14 | * notice, this list of conditions and the following disclaimer in the | |||
15 | * documentation and/or other materials provided with the distribution. | |||
16 | * 3. Neither the name of the project nor the names of its contributors | |||
17 | * may be used to endorse or promote products derived from this software | |||
18 | * without specific prior written permission. | |||
19 | * | |||
20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND | |||
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE | |||
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
30 | * SUCH DAMAGE. | |||
31 | */ | |||
32 | ||||
33 | #include <sys/types.h> | |||
34 | #include <sys/ioctl.h> | |||
35 | #include <sys/socket.h> | |||
36 | #include <sys/sysctl.h> | |||
37 | #include <sys/uio.h> | |||
38 | ||||
39 | #include <net/if.h> | |||
40 | #include <net/route.h> | |||
41 | #include <netinet/in.h> | |||
42 | #include <netinet/ip6.h> | |||
43 | #include <netinet/udp.h> | |||
44 | #include <netinet6/in6_var.h> | |||
45 | ||||
46 | #include <arpa/inet.h> | |||
47 | #include <errno(*__errno()).h> | |||
48 | #include <ifaddrs.h> | |||
49 | #include <netdb.h> | |||
50 | #include <poll.h> | |||
51 | #include <signal.h> | |||
52 | #include <stdarg.h> | |||
53 | #include <stddef.h> | |||
54 | #include <stdint.h> | |||
55 | #include <stdio.h> | |||
56 | #include <stdlib.h> | |||
57 | #include <string.h> | |||
58 | #include <time.h> | |||
59 | #include <unistd.h> | |||
60 | ||||
61 | #include "route6d.h" | |||
62 | #include "log.h" | |||
63 | ||||
64 | #define MAXFILTER40 40 | |||
65 | ||||
66 | #ifdef DEBUG | |||
67 | #define INIT_INTERVAL610 6 | |||
68 | #else | |||
69 | #define INIT_INTERVAL610 10 /* Wait to submit a initial riprequest */ | |||
70 | #endif | |||
71 | ||||
72 | /* alignment constraint for routing socket */ | |||
73 | #define ROUNDUP(a)((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof (long)) \ | |||
74 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |||
75 | #define ADVANCE(x, n)(x += (((n)->sa_len) > 0 ? (1 + ((((n)->sa_len) - 1) | (sizeof(long) - 1))) : sizeof(long))) (x += ROUNDUP((n)->sa_len)(((n)->sa_len) > 0 ? (1 + ((((n)->sa_len) - 1) | (sizeof (long) - 1))) : sizeof(long))) | |||
76 | ||||
77 | /* | |||
78 | * Following two macros are highly depending on KAME Release | |||
79 | */ | |||
80 | #define IN6_LINKLOCAL_IFINDEX(addr)((addr).__u6_addr.__u6_addr8[2] << 8 | (addr).__u6_addr .__u6_addr8[3]) \ | |||
81 | ((addr).s6_addr__u6_addr.__u6_addr8[2] << 8 | (addr).s6_addr__u6_addr.__u6_addr8[3]) | |||
82 | ||||
83 | #define SET_IN6_LINKLOCAL_IFINDEX(addr, index)do { (addr).__u6_addr.__u6_addr8[2] = ((index) >> 8) & 0xff; (addr).__u6_addr.__u6_addr8[3] = (index) & 0xff; } while (0) \ | |||
84 | do { \ | |||
85 | (addr).s6_addr__u6_addr.__u6_addr8[2] = ((index) >> 8) & 0xff; \ | |||
86 | (addr).s6_addr__u6_addr.__u6_addr8[3] = (index) & 0xff; \ | |||
87 | } while (0) | |||
88 | ||||
89 | struct ifc { /* Configuration of an interface */ | |||
90 | char *ifc_name; /* if name */ | |||
91 | struct ifc *ifc_next; | |||
92 | int ifc_index; /* if index */ | |||
93 | int ifc_mtu; /* if mtu */ | |||
94 | int ifc_metric; /* if metric */ | |||
95 | u_int ifc_flags; /* flags */ | |||
96 | short ifc_cflags; /* IFC_XXX */ | |||
97 | struct in6_addr ifc_mylladdr; /* my link-local address */ | |||
98 | struct sockaddr_in6 ifc_ripsin; /* rip multicast address */ | |||
99 | struct iff *ifc_filter; /* filter structure */ | |||
100 | struct ifac *ifc_addr; /* list of AF_INET6 addresses */ | |||
101 | int ifc_joined; /* joined to ff02::9 */ | |||
102 | }; | |||
103 | ||||
104 | struct ifac { /* Address associated to an interface */ | |||
105 | struct ifc *ifa_conf; /* back pointer */ | |||
106 | struct ifac *ifa_next; | |||
107 | struct in6_addr ifa_addr; /* address */ | |||
108 | struct in6_addr ifa_raddr; /* remote address, valid in p2p */ | |||
109 | int ifa_plen; /* prefix length */ | |||
110 | }; | |||
111 | ||||
112 | struct iff { | |||
113 | int iff_type; | |||
114 | struct in6_addr iff_addr; | |||
115 | int iff_plen; | |||
116 | struct iff *iff_next; | |||
117 | }; | |||
118 | ||||
119 | struct ifc *ifc; | |||
120 | int nifc; /* number of valid ifc's */ | |||
121 | struct ifc **index2ifc; | |||
122 | int nindex2ifc; | |||
123 | struct ifc *loopifcp = NULL((void*)0); /* pointing to loopback */ | |||
124 | struct pollfd pfd[2]; | |||
125 | int rtsock; /* the routing socket */ | |||
126 | int ripsock; /* socket to send/receive RIP datagram */ | |||
127 | ||||
128 | struct rip6 *ripbuf; /* packet buffer for sending */ | |||
129 | ||||
130 | /* | |||
131 | * Maintain the routes in a linked list. When the number of the routes | |||
132 | * grows, somebody would like to introduce a hash based or a radix tree | |||
133 | * based structure. I believe the number of routes handled by RIP is | |||
134 | * limited and I don't have to manage a complex data structure, however. | |||
135 | * | |||
136 | * One of the major drawbacks of the linear linked list is the difficulty | |||
137 | * of representing the relationship between a couple of routes. This may | |||
138 | * be a significant problem when we have to support route aggregation with | |||
139 | * suppressing the specifics covered by the aggregate. | |||
140 | */ | |||
141 | ||||
142 | struct riprt { | |||
143 | struct riprt *rrt_next; /* next destination */ | |||
144 | struct netinfo6 rrt_info; /* network info */ | |||
145 | struct in6_addr rrt_gw; /* gateway */ | |||
146 | u_long rrt_flags; /* kernel routing table flags */ | |||
147 | u_long rrt_rflags; /* route6d routing table flags */ | |||
148 | time_t rrt_t; /* when the route validated */ | |||
149 | int rrt_index; /* ifindex from which this route got */ | |||
150 | }; | |||
151 | ||||
152 | struct riprt *riprt = 0; | |||
153 | ||||
154 | int dflag = 0; /* debug flag */ | |||
155 | int qflag = 0; /* quiet flag */ | |||
156 | int nflag = 0; /* don't update kernel routing table */ | |||
157 | int aflag = 0; /* age out even the statically defined routes */ | |||
158 | int hflag = 0; /* don't split horizon */ | |||
159 | int lflag = 0; /* exchange site local routes */ | |||
160 | int sflag = 0; /* announce static routes w/ split horizon */ | |||
161 | int Sflag = 0; /* announce static routes to every interface */ | |||
162 | int uflag = 0; /* always log route updates (additions/deletions) */ | |||
163 | unsigned long routetag = 0; /* route tag attached on originating case */ | |||
164 | ||||
165 | char *filter[MAXFILTER40]; | |||
166 | int filtertype[MAXFILTER40]; | |||
167 | int nfilter = 0; | |||
168 | ||||
169 | pid_t pid; | |||
170 | ||||
171 | struct sockaddr_storage ripsin; | |||
172 | ||||
173 | time_t nextalarm = 0; | |||
174 | time_t sup_trig_update = 0; | |||
175 | ||||
176 | static int seq = 0; | |||
177 | ||||
178 | volatile sig_atomic_t seenalrm; | |||
179 | volatile sig_atomic_t seenquit; | |||
180 | volatile sig_atomic_t seenusr1; | |||
181 | ||||
182 | #define RRTF_AGGREGATE0x08000000 0x08000000 | |||
183 | #define RRTF_NOADVERTISE0x10000000 0x10000000 | |||
184 | #define RRTF_NH_NOT_LLADDR0x20000000 0x20000000 | |||
185 | #define RRTF_SENDANYWAY0x40000000 0x40000000 | |||
186 | #define RRTF_CHANGED0x80000000 0x80000000 | |||
187 | ||||
188 | void sighandler(int); | |||
189 | void ripalarm(void); | |||
190 | void riprecv(void); | |||
191 | void ripsend(struct ifc *, struct sockaddr_in6 *, int); | |||
192 | int out_filter(struct riprt *, struct ifc *); | |||
193 | void init(void); | |||
194 | void sockopt(struct ifc *); | |||
195 | void ifconfig(void); | |||
196 | void ifconfig1(const char *, const struct sockaddr *, struct ifc *, int); | |||
197 | void rtrecv(void); | |||
198 | int rt_del(const struct sockaddr_in6 *, const struct sockaddr_in6 *, | |||
199 | const struct sockaddr_in6 *); | |||
200 | int rt_deladdr(struct ifc *, const struct sockaddr_in6 *, | |||
201 | const struct sockaddr_in6 *); | |||
202 | void filterconfig(void); | |||
203 | int getifmtu(int); | |||
204 | const char *rttypes(struct rt_msghdr *); | |||
205 | const char *rtflags(struct rt_msghdr *); | |||
206 | const char *ifflags(int); | |||
207 | int ifrt(struct ifc *, int); | |||
208 | void ifrt_p2p(struct ifc *, int); | |||
209 | void applyplen(struct in6_addr *, int); | |||
210 | void ifrtdump(int); | |||
211 | void ifdump(int); | |||
212 | void ifdump0(const struct ifc *); | |||
213 | void rtdump(int); | |||
214 | void rt_entry(struct rt_msghdr *, int); | |||
215 | __dead__attribute__((__noreturn__)) void rtdexit(void); | |||
216 | void riprequest(struct ifc *, struct netinfo6 *, int, struct sockaddr_in6 *); | |||
217 | void ripflush(struct ifc *, struct sockaddr_in6 *); | |||
218 | void sendrequest(struct ifc *); | |||
219 | int sin6mask2len(const struct sockaddr_in6 *); | |||
220 | int mask2len(const struct in6_addr *, int); | |||
221 | int sendpacket(struct sockaddr_in6 *, int); | |||
222 | int addroute(struct riprt *, const struct in6_addr *, struct ifc *); | |||
223 | int delroute(struct netinfo6 *, struct in6_addr *); | |||
224 | struct in6_addr *getroute(struct netinfo6 *, struct in6_addr *); | |||
225 | void krtread(int); | |||
226 | int tobeadv(struct riprt *, struct ifc *); | |||
227 | char *xstrdup(const char *); | |||
228 | const char *hms(void); | |||
229 | const char *inet6_n2p(const struct in6_addr *); | |||
230 | struct ifac *ifa_match(const struct ifc *, const struct in6_addr *, int); | |||
231 | struct in6_addr *plen2mask(int); | |||
232 | struct riprt *rtsearch(struct netinfo6 *, struct riprt **); | |||
233 | int ripinterval(int); | |||
234 | time_t ripsuptrig(void); | |||
235 | unsigned int if_maxindex(void); | |||
236 | struct ifc *ifc_find(char *); | |||
237 | struct iff *iff_find(struct ifc *, int); | |||
238 | void setindex2ifc(int, struct ifc *); | |||
239 | ||||
240 | int | |||
241 | main(int argc, char *argv[]) | |||
242 | { | |||
243 | int ch; | |||
244 | int error = 0; | |||
245 | struct ifc *ifcp; | |||
246 | sigset_t mask, omask; | |||
247 | char *ep; | |||
248 | ||||
249 | log_init(1); /* log to stderr until daemonized */ | |||
250 | ||||
251 | while ((ch = getopt(argc, argv, "A:N:O:T:L:t:adDhlnqsSu")) != -1) { | |||
| ||||
252 | switch (ch) { | |||
253 | case 'A': | |||
254 | case 'N': | |||
255 | case 'O': | |||
256 | case 'T': | |||
257 | case 'L': | |||
258 | if (nfilter >= MAXFILTER40) { | |||
259 | fatalx("Exceeds MAXFILTER"); | |||
260 | /*NOTREACHED*/ | |||
261 | } | |||
262 | filtertype[nfilter] = ch; | |||
263 | filter[nfilter++] = xstrdup(optarg); | |||
264 | break; | |||
265 | case 't': | |||
266 | ep = NULL((void*)0); | |||
267 | routetag = strtoul(optarg, &ep, 0); | |||
268 | if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) { | |||
269 | fatalx("invalid route tag"); | |||
270 | /*NOTREACHED*/ | |||
271 | } | |||
272 | break; | |||
273 | #define FLAG(c, flag, n) case c: do { flag = n; break; } while(0) | |||
274 | FLAG('a', aflag, 1); break; | |||
275 | FLAG('d', dflag, 1); break; | |||
276 | FLAG('D', dflag, 2); break; | |||
277 | FLAG('h', hflag, 1); break; | |||
278 | FLAG('l', lflag, 1); break; | |||
279 | FLAG('n', nflag, 1); break; | |||
280 | FLAG('q', qflag, 1); break; | |||
281 | FLAG('s', sflag, 1); break; | |||
282 | FLAG('S', Sflag, 1); break; | |||
283 | FLAG('u', uflag, 1); break; | |||
284 | #undef FLAG | |||
285 | default: | |||
286 | fatalx("Invalid option specified, terminating"); | |||
287 | /*NOTREACHED*/ | |||
288 | } | |||
289 | } | |||
290 | argc -= optind; | |||
291 | argv += optind; | |||
292 | if (argc > 0) { | |||
293 | fatalx("bogus extra arguments"); | |||
294 | /*NOTREACHED*/ | |||
295 | } | |||
296 | ||||
297 | if (geteuid()) { | |||
298 | nflag = 1; | |||
299 | log_warn("No kernel update is allowed"); | |||
300 | } | |||
301 | ||||
302 | if (dflag
| |||
303 | if (daemon(0, 0) == -1) { | |||
304 | fatal("daemon"); | |||
305 | /*NOTREACHED*/ | |||
306 | } | |||
307 | } | |||
308 | ||||
309 | log_init(dflag); | |||
310 | ||||
311 | pid = getpid(); | |||
312 | ||||
313 | if ((ripbuf = calloc(RIP6_MAXMTU1500, 1)) == NULL((void*)0)) | |||
314 | fatal(NULL((void*)0)); | |||
315 | ripbuf->rip6_cmd = RIP6_RESPONSE2; | |||
316 | ripbuf->rip6_vers = RIP6_VERSION1; | |||
317 | ripbuf->rip6_res1[0] = 0; | |||
318 | ripbuf->rip6_res1[1] = 0; | |||
319 | ||||
320 | init(); | |||
321 | ||||
322 | if (pledge("stdio inet route mcast", NULL((void*)0)) == -1) | |||
323 | fatal("pledge"); | |||
324 | ||||
325 | ifconfig(); | |||
326 | ||||
327 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { | |||
328 | if (ifcp->ifc_index < 0) { | |||
329 | log_warn( | |||
330 | "No ifindex found at %s (no link-local address?)", | |||
331 | ifcp->ifc_name); | |||
332 | error++; | |||
333 | } | |||
334 | } | |||
335 | if (error
| |||
336 | exit(1); | |||
337 | if (loopifcp == NULL((void*)0)) { | |||
338 | fatalx("No loopback found"); | |||
339 | /*NOTREACHED*/ | |||
340 | } | |||
341 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) | |||
342 | ifrt(ifcp, 0); | |||
343 | filterconfig(); | |||
344 | krtread(0); | |||
345 | if (dflag) | |||
346 | ifrtdump(0); | |||
347 | ||||
348 | if (signal(SIGALRM14, sighandler) == SIG_ERR(void (*)(int))-1 || | |||
349 | signal(SIGQUIT3, sighandler) == SIG_ERR(void (*)(int))-1 || | |||
350 | signal(SIGTERM15, sighandler) == SIG_ERR(void (*)(int))-1 || | |||
351 | signal(SIGUSR130, sighandler) == SIG_ERR(void (*)(int))-1 || | |||
352 | signal(SIGHUP1, sighandler) == SIG_ERR(void (*)(int))-1 || | |||
353 | signal(SIGINT2, sighandler) == SIG_ERR(void (*)(int))-1) { | |||
354 | fatal("signal"); | |||
355 | /*NOTREACHED*/ | |||
356 | } | |||
357 | /* | |||
358 | * To avoid rip packet congestion (not on a cable but in this | |||
359 | * process), wait for a moment to send the first RIP6_RESPONSE | |||
360 | * packets. | |||
361 | */ | |||
362 | alarm(ripinterval(INIT_INTERVAL610)); | |||
363 | ||||
364 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { | |||
365 | if (iff_find(ifcp, 'N')) | |||
366 | continue; | |||
367 | if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP0x1)) | |||
368 | sendrequest(ifcp); | |||
369 | } | |||
370 | ||||
371 | log_info("**** Started ****"); | |||
372 | sigemptyset(&mask); | |||
373 | sigaddset(&mask, SIGALRM14); | |||
374 | while (1) { | |||
375 | if (seenalrm) { | |||
376 | ripalarm(); | |||
377 | seenalrm = 0; | |||
378 | continue; | |||
379 | } | |||
380 | if (seenquit) { | |||
381 | rtdexit(); | |||
382 | seenquit = 0; | |||
383 | continue; | |||
384 | } | |||
385 | if (seenusr1) { | |||
386 | ifrtdump(SIGUSR130); | |||
387 | seenusr1 = 0; | |||
388 | continue; | |||
389 | } | |||
390 | ||||
391 | switch (poll(pfd, 2, INFTIM(-1))) | |||
392 | { | |||
393 | case -1: | |||
394 | if (errno(*__errno()) != EINTR4) { | |||
395 | fatal("poll"); | |||
396 | /*NOTREACHED*/ | |||
397 | } | |||
398 | continue; | |||
399 | case 0: | |||
400 | continue; | |||
401 | default: | |||
402 | if (pfd[0].revents & POLLIN0x0001) { | |||
403 | sigprocmask(SIG_BLOCK1, &mask, &omask); | |||
404 | riprecv(); | |||
405 | sigprocmask(SIG_SETMASK3, &omask, NULL((void*)0)); | |||
406 | } | |||
407 | if (pfd[1].revents & POLLIN0x0001) { | |||
408 | sigprocmask(SIG_BLOCK1, &mask, &omask); | |||
409 | rtrecv(); | |||
410 | sigprocmask(SIG_SETMASK3, &omask, NULL((void*)0)); | |||
411 | } | |||
412 | } | |||
413 | } | |||
414 | } | |||
415 | ||||
416 | void | |||
417 | sighandler(int signo) | |||
418 | { | |||
419 | ||||
420 | switch (signo) { | |||
421 | case SIGALRM14: | |||
422 | seenalrm++; | |||
423 | break; | |||
424 | case SIGQUIT3: | |||
425 | case SIGTERM15: | |||
426 | seenquit++; | |||
427 | break; | |||
428 | case SIGUSR130: | |||
429 | case SIGHUP1: | |||
430 | case SIGINT2: | |||
431 | seenusr1++; | |||
432 | break; | |||
433 | } | |||
434 | } | |||
435 | ||||
436 | /* | |||
437 | * gracefully exits after resetting sockopts. | |||
438 | */ | |||
439 | void | |||
440 | rtdexit(void) | |||
441 | { | |||
442 | struct riprt *rrt; | |||
443 | ||||
444 | alarm(0); | |||
445 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { | |||
446 | if (rrt->rrt_rflags & RRTF_AGGREGATE0x08000000) { | |||
447 | delroute(&rrt->rrt_info, &rrt->rrt_gw); | |||
448 | } | |||
449 | } | |||
450 | close(ripsock); | |||
451 | close(rtsock); | |||
452 | log_info("**** Terminated ****"); | |||
453 | exit(1); | |||
454 | } | |||
455 | ||||
456 | /* | |||
457 | * Called periodically: | |||
458 | * 1. age out the learned route. remove it if necessary. | |||
459 | * 2. submit RIP6_RESPONSE packets. | |||
460 | * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have | |||
461 | * to invoke this function in every 1 or 5 or 10 seconds only to age the | |||
462 | * routes more precisely. | |||
463 | */ | |||
464 | void | |||
465 | ripalarm(void) | |||
466 | { | |||
467 | struct ifc *ifcp; | |||
468 | struct riprt *rrt, *rrt_prev, *rrt_next; | |||
469 | time_t t_lifetime, t_holddown; | |||
470 | ||||
471 | /* age the RIP routes */ | |||
472 | rrt_prev = 0; | |||
473 | t_lifetime = time(NULL((void*)0)) - RIP_LIFETIME180; | |||
474 | t_holddown = t_lifetime - RIP_HOLDDOWN120; | |||
475 | for (rrt = riprt; rrt; rrt = rrt_next) { | |||
476 | rrt_next = rrt->rrt_next; | |||
477 | ||||
478 | if (rrt->rrt_t == 0) { | |||
479 | rrt_prev = rrt; | |||
480 | continue; | |||
481 | } | |||
482 | if (rrt->rrt_t < t_holddown) { | |||
483 | if (rrt_prev) { | |||
484 | rrt_prev->rrt_next = rrt->rrt_next; | |||
485 | } else { | |||
486 | riprt = rrt->rrt_next; | |||
487 | } | |||
488 | delroute(&rrt->rrt_info, &rrt->rrt_gw); | |||
489 | free(rrt); | |||
490 | continue; | |||
491 | } | |||
492 | if (rrt->rrt_t < t_lifetime) | |||
493 | rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; | |||
494 | rrt_prev = rrt; | |||
495 | } | |||
496 | /* Supply updates */ | |||
497 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { | |||
498 | if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP0x1)) | |||
499 | ripsend(ifcp, &ifcp->ifc_ripsin, 0); | |||
500 | } | |||
501 | alarm(ripinterval(SUPPLY_INTERVAL630)); | |||
502 | } | |||
503 | ||||
504 | void | |||
505 | init(void) | |||
506 | { | |||
507 | int i, error; | |||
508 | const int int0 = 0, int1 = 1, int255 = 255; | |||
509 | struct addrinfo hints, *res; | |||
510 | char port[NI_MAXSERV32]; | |||
511 | ||||
512 | ifc = (struct ifc *)NULL((void*)0); | |||
513 | nifc = 0; | |||
514 | nindex2ifc = 0; /*initial guess*/ | |||
515 | index2ifc = NULL((void*)0); | |||
516 | snprintf(port, sizeof(port), "%u", RIP6_PORT521); | |||
517 | ||||
518 | memset(&hints, 0, sizeof(hints)); | |||
519 | hints.ai_family = PF_INET624; | |||
520 | hints.ai_socktype = SOCK_DGRAM2; | |||
521 | hints.ai_flags = AI_PASSIVE1; | |||
522 | error = getaddrinfo(NULL((void*)0), port, &hints, &res); | |||
523 | if (error) { | |||
524 | fatalx(gai_strerror(error)); | |||
525 | /*NOTREACHED*/ | |||
526 | } | |||
527 | if (res->ai_next) { | |||
528 | fatalx(":: resolved to multiple address"); | |||
529 | /*NOTREACHED*/ | |||
530 | } | |||
531 | ||||
532 | ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |||
533 | if (ripsock == -1) { | |||
534 | fatal("rip socket"); | |||
535 | /*NOTREACHED*/ | |||
536 | } | |||
537 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_V6ONLY27, | |||
538 | &int1, sizeof(int1)) == -1) { | |||
539 | fatal("rip IPV6_V6ONLY"); | |||
540 | /*NOTREACHED*/ | |||
541 | } | |||
542 | if (bind(ripsock, res->ai_addr, res->ai_addrlen) == -1) { | |||
543 | fatal("rip bind"); | |||
544 | /*NOTREACHED*/ | |||
545 | } | |||
546 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_MULTICAST_HOPS10, | |||
547 | &int255, sizeof(int255)) == -1) { | |||
548 | fatal("rip IPV6_MULTICAST_HOPS"); | |||
549 | /*NOTREACHED*/ | |||
550 | } | |||
551 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_MULTICAST_LOOP11, | |||
552 | &int0, sizeof(int0)) == -1) { | |||
553 | fatal("rip IPV6_MULTICAST_LOOP"); | |||
554 | /*NOTREACHED*/ | |||
555 | } | |||
556 | ||||
557 | i = 1; | |||
558 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_RECVPKTINFO36, &i, | |||
559 | sizeof(i)) == -1) { | |||
560 | fatal("rip IPV6_RECVPKTINFO"); | |||
561 | /*NOTREACHED*/ | |||
562 | } | |||
563 | ||||
564 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_RECVHOPLIMIT37, | |||
565 | &int1, sizeof(int1)) == -1) { | |||
566 | fatal("rip IPV6_RECVHOPLIMIT"); | |||
567 | /*NOTREACHED*/ | |||
568 | } | |||
569 | ||||
570 | freeaddrinfo(res); | |||
571 | memset(&hints, 0, sizeof(hints)); | |||
572 | hints.ai_family = PF_INET624; | |||
573 | hints.ai_socktype = SOCK_DGRAM2; | |||
574 | error = getaddrinfo(RIP6_DEST"ff02::9", port, &hints, &res); | |||
575 | if (error) { | |||
576 | fatalx(gai_strerror(error)); | |||
577 | /*NOTREACHED*/ | |||
578 | } | |||
579 | if (res->ai_next) { | |||
580 | fatalx(RIP6_DEST"ff02::9" " resolved to multiple address"); | |||
581 | /*NOTREACHED*/ | |||
582 | } | |||
583 | memcpy(&ripsin, res->ai_addr, res->ai_addrlen); | |||
584 | freeaddrinfo(res); | |||
585 | ||||
586 | pfd[0].fd = ripsock; | |||
587 | pfd[0].events = POLLIN0x0001; | |||
588 | ||||
589 | if (nflag == 0) { | |||
590 | if ((rtsock = socket(AF_ROUTE17, SOCK_RAW3, 0)) == -1) { | |||
591 | fatal("route socket"); | |||
592 | /*NOTREACHED*/ | |||
593 | } | |||
594 | pfd[1].fd = rtsock; | |||
595 | pfd[1].events = POLLIN0x0001; | |||
596 | } else | |||
597 | pfd[1].fd = -1; | |||
598 | ||||
599 | } | |||
600 | ||||
601 | #define RIPSIZE(n)(sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) \ | |||
602 | (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6)) | |||
603 | ||||
604 | /* | |||
605 | * ripflush flushes the rip datagram stored in the rip buffer | |||
606 | */ | |||
607 | static int nrt; | |||
608 | static struct netinfo6 *np; | |||
609 | ||||
610 | void | |||
611 | ripflush(struct ifc *ifcp, struct sockaddr_in6 *sin6) | |||
612 | { | |||
613 | int i; | |||
614 | int error; | |||
615 | ||||
616 | if (ifcp) | |||
617 | log_debug("Send(%s): info(%d) to %s.%d", | |||
618 | ifcp->ifc_name, nrt, | |||
619 | inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)(__uint16_t)(__builtin_constant_p(sin6->sin6_port) ? (__uint16_t )(((__uint16_t)(sin6->sin6_port) & 0xffU) << 8 | ((__uint16_t)(sin6->sin6_port) & 0xff00U) >> 8) : __swap16md(sin6->sin6_port))); | |||
620 | else | |||
621 | log_debug("Send: info(%d) to %s.%d", | |||
622 | nrt, inet6_n2p(&sin6->sin6_addr), ntohs(sin6->sin6_port)(__uint16_t)(__builtin_constant_p(sin6->sin6_port) ? (__uint16_t )(((__uint16_t)(sin6->sin6_port) & 0xffU) << 8 | ((__uint16_t)(sin6->sin6_port) & 0xff00U) >> 8) : __swap16md(sin6->sin6_port))); | |||
623 | if (dflag >= 2) { | |||
624 | np = ripbuf->rip6_netsrip6un.ru6_nets; | |||
625 | for (i = 0; i < nrt; i++, np++) { | |||
626 | if (np->rip6_metric == NEXTHOP_METRIC0xff) { | |||
627 | if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0))) | |||
628 | log_enqueue(" NextHop reset"); | |||
629 | else { | |||
630 | log_enqueue(" NextHop %s", | |||
631 | inet6_n2p(&np->rip6_dest)); | |||
632 | } | |||
633 | } else { | |||
634 | log_enqueue(" %s/%d[%d]", | |||
635 | inet6_n2p(&np->rip6_dest), | |||
636 | np->rip6_plen, np->rip6_metric); | |||
637 | } | |||
638 | if (np->rip6_tag) { | |||
639 | log_enqueue(" tag=0x%04x", | |||
640 | ntohs(np->rip6_tag)(__uint16_t)(__builtin_constant_p(np->rip6_tag) ? (__uint16_t )(((__uint16_t)(np->rip6_tag) & 0xffU) << 8 | (( __uint16_t)(np->rip6_tag) & 0xff00U) >> 8) : __swap16md (np->rip6_tag)) & 0xffff); | |||
641 | } | |||
642 | log_debug(""); | |||
643 | } | |||
644 | } | |||
645 | error = sendpacket(sin6, RIPSIZE(nrt)(sizeof(struct rip6) + ((nrt)-1) * sizeof(struct netinfo6))); | |||
646 | if (error == EAFNOSUPPORT47) { | |||
647 | /* Protocol not supported */ | |||
648 | log_debug("Could not send info to %s (%s): " | |||
649 | "set IFF_UP to 0", | |||
650 | ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); | |||
651 | ifcp->ifc_flags &= ~IFF_UP0x1; /* As if down for AF_INET6 */ | |||
652 | } | |||
653 | nrt = 0; np = ripbuf->rip6_netsrip6un.ru6_nets; | |||
654 | } | |||
655 | ||||
656 | /* | |||
657 | * Generate RIP6_RESPONSE packets and send them. | |||
658 | */ | |||
659 | void | |||
660 | ripsend(struct ifc *ifcp, struct sockaddr_in6 *sin6, int flag) | |||
661 | { | |||
662 | struct riprt *rrt; | |||
663 | struct in6_addr *nh; /* next hop */ | |||
664 | int maxrte; | |||
665 | ||||
666 | if (qflag) | |||
667 | return; | |||
668 | ||||
669 | if (ifcp == NULL((void*)0)) { | |||
670 | /* | |||
671 | * Request from non-link local address is not | |||
672 | * a regular route6d update. | |||
673 | */ | |||
674 | maxrte = (IFMINMTU576 - sizeof(struct ip6_hdr) - | |||
675 | sizeof(struct udphdr) - | |||
676 | sizeof(struct rip6) + sizeof(struct netinfo6)) / | |||
677 | sizeof(struct netinfo6); | |||
678 | nrt = 0; np = ripbuf->rip6_netsrip6un.ru6_nets; nh = NULL((void*)0); | |||
679 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { | |||
680 | if (rrt->rrt_rflags & RRTF_NOADVERTISE0x10000000) | |||
681 | continue; | |||
682 | /* Put the route to the buffer */ | |||
683 | *np = rrt->rrt_info; | |||
684 | np++; nrt++; | |||
685 | if (nrt == maxrte) { | |||
686 | ripflush(NULL((void*)0), sin6); | |||
687 | nh = NULL((void*)0); | |||
688 | } | |||
689 | } | |||
690 | if (nrt) /* Send last packet */ | |||
691 | ripflush(NULL((void*)0), sin6); | |||
692 | return; | |||
693 | } | |||
694 | ||||
695 | if ((flag & RRTF_SENDANYWAY0x40000000) == 0 && | |||
696 | (qflag || (ifcp->ifc_flags & IFF_LOOPBACK0x8))) | |||
697 | return; | |||
698 | ||||
699 | /* -N: no use */ | |||
700 | if (iff_find(ifcp, 'N') != NULL((void*)0)) | |||
701 | return; | |||
702 | ||||
703 | /* -T: generate default route only */ | |||
704 | if (iff_find(ifcp, 'T') != NULL((void*)0)) { | |||
705 | struct netinfo6 rrt_info; | |||
706 | memset(&rrt_info, 0, sizeof(struct netinfo6)); | |||
707 | rrt_info.rip6_dest = in6addr_any; | |||
708 | rrt_info.rip6_plen = 0; | |||
709 | rrt_info.rip6_metric = 1; | |||
710 | rrt_info.rip6_metric += ifcp->ifc_metric; | |||
711 | rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); | |||
712 | np = ripbuf->rip6_netsrip6un.ru6_nets; | |||
713 | *np = rrt_info; | |||
714 | nrt = 1; | |||
715 | ripflush(ifcp, sin6); | |||
716 | return; | |||
717 | } | |||
718 | ||||
719 | maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) - | |||
720 | sizeof(struct udphdr) - | |||
721 | sizeof(struct rip6) + sizeof(struct netinfo6)) / | |||
722 | sizeof(struct netinfo6); | |||
723 | ||||
724 | nrt = 0; np = ripbuf->rip6_netsrip6un.ru6_nets; nh = NULL((void*)0); | |||
725 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { | |||
726 | if (rrt->rrt_rflags & RRTF_NOADVERTISE0x10000000) | |||
727 | continue; | |||
728 | ||||
729 | /* Need to check filter here */ | |||
730 | if (out_filter(rrt, ifcp) == 0) | |||
731 | continue; | |||
732 | ||||
733 | /* Check split horizon and other conditions */ | |||
734 | if (tobeadv(rrt, ifcp) == 0) | |||
735 | continue; | |||
736 | ||||
737 | /* Only considers the routes with flag if specified */ | |||
738 | if ((flag & RRTF_CHANGED0x80000000) && | |||
739 | (rrt->rrt_rflags & RRTF_CHANGED0x80000000) == 0) | |||
740 | continue; | |||
741 | ||||
742 | /* Check nexthop */ | |||
743 | if (rrt->rrt_index == ifcp->ifc_index && | |||
744 | !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == 0)) && | |||
745 | (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR0x20000000) == 0) { | |||
746 | if (nh == NULL((void*)0) || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)(memcmp(&(nh)->__u6_addr.__u6_addr8[0], &(&rrt ->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { | |||
747 | if (nrt == maxrte - 2) | |||
748 | ripflush(ifcp, sin6); | |||
749 | np->rip6_dest = rrt->rrt_gw; | |||
750 | if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) | |||
751 | SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0)do { (np->rip6_dest).__u6_addr.__u6_addr8[2] = ((0) >> 8) & 0xff; (np->rip6_dest).__u6_addr.__u6_addr8[3] = ( 0) & 0xff; } while (0); | |||
752 | np->rip6_plen = 0; | |||
753 | np->rip6_tag = 0; | |||
754 | np->rip6_metric = NEXTHOP_METRIC0xff; | |||
755 | nh = &rrt->rrt_gw; | |||
756 | np++; nrt++; | |||
757 | } | |||
758 | } else if (nh && (rrt->rrt_index != ifcp->ifc_index || | |||
759 | !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)(memcmp(&(nh)->__u6_addr.__u6_addr8[0], &(&rrt ->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0) || | |||
760 | rrt->rrt_rflags & RRTF_NH_NOT_LLADDR0x20000000)) { | |||
761 | /* Reset nexthop */ | |||
762 | if (nrt == maxrte - 2) | |||
763 | ripflush(ifcp, sin6); | |||
764 | memset(np, 0, sizeof(struct netinfo6)); | |||
765 | np->rip6_metric = NEXTHOP_METRIC0xff; | |||
766 | nh = NULL((void*)0); | |||
767 | np++; nrt++; | |||
768 | } | |||
769 | ||||
770 | /* Put the route to the buffer */ | |||
771 | *np = rrt->rrt_info; | |||
772 | np++; nrt++; | |||
773 | if (nrt == maxrte) { | |||
774 | ripflush(ifcp, sin6); | |||
775 | nh = NULL((void*)0); | |||
776 | } | |||
777 | } | |||
778 | if (nrt) /* Send last packet */ | |||
779 | ripflush(ifcp, sin6); | |||
780 | } | |||
781 | ||||
782 | /* | |||
783 | * outbound filter logic, per-route/interface. | |||
784 | */ | |||
785 | int | |||
786 | out_filter(struct riprt *rrt, struct ifc *ifcp) | |||
787 | { | |||
788 | struct iff *iffp; | |||
789 | struct in6_addr ia; | |||
790 | int ok; | |||
791 | ||||
792 | /* | |||
793 | * -A: filter out less specific routes, if we have aggregated | |||
794 | * route configured. | |||
795 | */ | |||
796 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { | |||
797 | if (iffp->iff_type != 'A') | |||
798 | continue; | |||
799 | if (rrt->rrt_info.rip6_plen <= iffp->iff_plen) | |||
800 | continue; | |||
801 | ia = rrt->rrt_info.rip6_dest; | |||
802 | applyplen(&ia, iffp->iff_plen); | |||
803 | if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& iffp->iff_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) | |||
804 | return 0; | |||
805 | } | |||
806 | ||||
807 | /* | |||
808 | * if it is an aggregated route, advertise it only to the | |||
809 | * interfaces specified on -A. | |||
810 | */ | |||
811 | if ((rrt->rrt_rflags & RRTF_AGGREGATE0x08000000) != 0) { | |||
812 | ok = 0; | |||
813 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { | |||
814 | if (iffp->iff_type != 'A') | |||
815 | continue; | |||
816 | if (rrt->rrt_info.rip6_plen == iffp->iff_plen && | |||
817 | IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&iffp->iff_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) | |||
818 | &iffp->iff_addr)(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&iffp->iff_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0)) { | |||
819 | ok = 1; | |||
820 | break; | |||
821 | } | |||
822 | } | |||
823 | if (!ok) | |||
824 | return 0; | |||
825 | } | |||
826 | ||||
827 | /* | |||
828 | * -O: advertise only if prefix matches the configured prefix. | |||
829 | */ | |||
830 | if (iff_find(ifcp, 'O')) { | |||
831 | ok = 0; | |||
832 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { | |||
833 | if (iffp->iff_type != 'O') | |||
834 | continue; | |||
835 | if (rrt->rrt_info.rip6_plen < iffp->iff_plen) | |||
836 | continue; | |||
837 | ia = rrt->rrt_info.rip6_dest; | |||
838 | applyplen(&ia, iffp->iff_plen); | |||
839 | if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& iffp->iff_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) { | |||
840 | ok = 1; | |||
841 | break; | |||
842 | } | |||
843 | } | |||
844 | if (!ok) | |||
845 | return 0; | |||
846 | } | |||
847 | ||||
848 | /* the prefix should be advertised */ | |||
849 | return 1; | |||
850 | } | |||
851 | ||||
852 | /* | |||
853 | * Determine if the route is to be advertised on the specified interface. | |||
854 | * It checks options specified in the arguments and the split horizon rule. | |||
855 | */ | |||
856 | int | |||
857 | tobeadv(struct riprt *rrt, struct ifc *ifcp) | |||
858 | { | |||
859 | ||||
860 | /* Special care for static routes */ | |||
861 | if (rrt->rrt_flags & RTF_STATIC0x800) { | |||
862 | /* XXX don't advertise reject/blackhole routes */ | |||
863 | if (rrt->rrt_flags & (RTF_REJECT0x8 | RTF_BLACKHOLE0x1000)) | |||
864 | return 0; | |||
865 | ||||
866 | if (Sflag) /* Yes, advertise it anyway */ | |||
867 | return 1; | |||
868 | if (sflag && rrt->rrt_index != ifcp->ifc_index) | |||
869 | return 1; | |||
870 | return 0; | |||
871 | } | |||
872 | /* Regular split horizon */ | |||
873 | if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index) | |||
874 | return 0; | |||
875 | return 1; | |||
876 | } | |||
877 | ||||
878 | /* | |||
879 | * Send a rip packet actually. | |||
880 | */ | |||
881 | int | |||
882 | sendpacket(struct sockaddr_in6 *sin6, int len) | |||
883 | { | |||
884 | struct msghdr m; | |||
885 | struct cmsghdr *cm; | |||
886 | struct iovec iov[2]; | |||
887 | union { | |||
888 | struct cmsghdr hdr; | |||
889 | u_char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) ))]; | |||
890 | } cmsgbuf; | |||
891 | struct in6_pktinfo *pi; | |||
892 | int idx; | |||
893 | struct sockaddr_in6 sincopy; | |||
894 | ||||
895 | /* do not overwrite the given sin */ | |||
896 | sincopy = *sin6; | |||
897 | sin6 = &sincopy; | |||
898 | ||||
899 | if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)(((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sin6->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80)) || | |||
900 | IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { | |||
901 | /* XXX: do not mix the interface index and link index */ | |||
902 | idx = IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr)((sin6->sin6_addr).__u6_addr.__u6_addr8[2] << 8 | (sin6 ->sin6_addr).__u6_addr.__u6_addr8[3]); | |||
903 | SET_IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr, 0)do { (sin6->sin6_addr).__u6_addr.__u6_addr8[2] = ((0) >> 8) & 0xff; (sin6->sin6_addr).__u6_addr.__u6_addr8[3] = (0) & 0xff; } while (0); | |||
904 | sin6->sin6_scope_id = idx; | |||
905 | } else | |||
906 | idx = 0; | |||
907 | ||||
908 | m.msg_name = (caddr_t)sin6; | |||
909 | m.msg_namelen = sizeof(*sin6); | |||
910 | iov[0].iov_base = (caddr_t)ripbuf; | |||
911 | iov[0].iov_len = len; | |||
912 | m.msg_iov = iov; | |||
913 | m.msg_iovlen = 1; | |||
914 | if (!idx) { | |||
915 | m.msg_control = NULL((void*)0); | |||
916 | m.msg_controllen = 0; | |||
917 | } else { | |||
918 | memset(&cmsgbuf, 0, sizeof(cmsgbuf)); | |||
919 | m.msg_control = (caddr_t)&cmsgbuf.buf; | |||
920 | m.msg_controllen = sizeof(cmsgbuf.buf); | |||
921 | cm = CMSG_FIRSTHDR(&m)((&m)->msg_controllen >= sizeof(struct cmsghdr) ? ( struct cmsghdr *)(&m)->msg_control : (struct cmsghdr * )((void*)0)); | |||
922 | cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(struct in6_pktinfo))); | |||
923 | cm->cmsg_level = IPPROTO_IPV641; | |||
924 | cm->cmsg_type = IPV6_PKTINFO46; | |||
925 | pi = (struct in6_pktinfo *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); | |||
926 | memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/ | |||
927 | pi->ipi6_ifindex = idx; | |||
928 | } | |||
929 | ||||
930 | if (sendmsg(ripsock, &m, 0) == -1) { | |||
931 | log_debug("sendmsg: %s", strerror(errno(*__errno()))); | |||
932 | return errno(*__errno()); | |||
933 | } | |||
934 | ||||
935 | return 0; | |||
936 | } | |||
937 | ||||
938 | /* | |||
939 | * Receive and process RIP packets. Update the routes/kernel forwarding | |||
940 | * table if necessary. | |||
941 | */ | |||
942 | void | |||
943 | riprecv(void) | |||
944 | { | |||
945 | struct ifc *ifcp, *ic; | |||
946 | struct sockaddr_in6 fsock; | |||
947 | struct in6_addr nh; /* next hop */ | |||
948 | struct rip6 *rp; | |||
949 | struct netinfo6 *np, *nq; | |||
950 | struct riprt *rrt; | |||
951 | ssize_t len, nn; | |||
952 | unsigned int need_trigger, idx; | |||
953 | char buf[4 * RIP6_MAXMTU1500]; | |||
954 | time_t t; | |||
955 | struct msghdr m; | |||
956 | struct cmsghdr *cm; | |||
957 | struct iovec iov[2]; | |||
958 | union { | |||
959 | struct cmsghdr hdr; | |||
960 | u_char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(struct in6_pktinfo)) + (sizeof(long) - 1)) &~(sizeof(long) - 1) )) + | |||
961 | CMSG_SPACE(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof(int)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))]; | |||
962 | } cmsgbuf; | |||
963 | struct in6_pktinfo *pi = NULL((void*)0); | |||
964 | int *hlimp = NULL((void*)0); | |||
965 | struct iff *iffp; | |||
966 | struct in6_addr ia; | |||
967 | int ok; | |||
968 | time_t t_half_lifetime; | |||
969 | ||||
970 | need_trigger = 0; | |||
971 | ||||
972 | m.msg_name = (caddr_t)&fsock; | |||
973 | m.msg_namelen = sizeof(fsock); | |||
974 | iov[0].iov_base = (caddr_t)buf; | |||
975 | iov[0].iov_len = sizeof(buf); | |||
976 | m.msg_iov = iov; | |||
977 | m.msg_iovlen = 1; | |||
978 | m.msg_control = (caddr_t)&cmsgbuf.buf; | |||
979 | m.msg_controllen = sizeof(cmsgbuf.buf); | |||
980 | if ((len = recvmsg(ripsock, &m, 0)) == -1) { | |||
981 | fatal("recvmsg"); | |||
982 | /*NOTREACHED*/ | |||
983 | } | |||
984 | idx = 0; | |||
985 | for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m)((&m)->msg_controllen >= sizeof(struct cmsghdr) ? ( struct cmsghdr *)(&m)->msg_control : (struct cmsghdr * )((void*)0)); | |||
986 | cm; | |||
987 | cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)(((char *)(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof (long) - 1)) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof (struct cmsghdr)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)) > ((char *)(&m)->msg_control) + (&m)->msg_controllen ) ? (struct cmsghdr *)((void*)0) : (struct cmsghdr *)((char * )(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof(long) - 1)) &~(sizeof(long) - 1))))) { | |||
988 | if (cm->cmsg_level != IPPROTO_IPV641) | |||
989 | continue; | |||
990 | switch (cm->cmsg_type) { | |||
991 | case IPV6_PKTINFO46: | |||
992 | if (cm->cmsg_len != CMSG_LEN(sizeof(*pi))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(*pi)))) { | |||
993 | log_debug( | |||
994 | "invalid cmsg length for IPV6_PKTINFO"); | |||
995 | return; | |||
996 | } | |||
997 | pi = (struct in6_pktinfo *)(CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))); | |||
998 | idx = pi->ipi6_ifindex; | |||
999 | break; | |||
1000 | case IPV6_HOPLIMIT47: | |||
1001 | if (cm->cmsg_len != CMSG_LEN(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(int)))) { | |||
1002 | log_debug( | |||
1003 | "invalid cmsg length for IPV6_HOPLIMIT"); | |||
1004 | return; | |||
1005 | } | |||
1006 | hlimp = (int *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); | |||
1007 | break; | |||
1008 | } | |||
1009 | } | |||
1010 | if (idx && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)(((&fsock.sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&fsock.sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) | |||
1011 | SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, idx)do { (fsock.sin6_addr).__u6_addr.__u6_addr8[2] = ((idx) >> 8) & 0xff; (fsock.sin6_addr).__u6_addr.__u6_addr8[3] = ( idx) & 0xff; } while (0); | |||
1012 | ||||
1013 | if (len < sizeof(struct rip6)) { | |||
1014 | log_debug("Packet too short"); | |||
1015 | return; | |||
1016 | } | |||
1017 | ||||
1018 | if (pi == NULL((void*)0) || hlimp == NULL((void*)0)) { | |||
1019 | /* | |||
1020 | * This can happen when the kernel failed to allocate memory | |||
1021 | * for the ancillary data. Although we might be able to handle | |||
1022 | * some cases without this info, those are minor and not so | |||
1023 | * important, so it's better to discard the packet for safer | |||
1024 | * operation. | |||
1025 | */ | |||
1026 | log_debug("IPv6 packet information cannot be retrieved"); | |||
1027 | return; | |||
1028 | } | |||
1029 | ||||
1030 | nh = fsock.sin6_addr; | |||
1031 | nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / | |||
1032 | sizeof(struct netinfo6); | |||
1033 | rp = (struct rip6 *)buf; | |||
1034 | np = rp->rip6_netsrip6un.ru6_nets; | |||
1035 | ||||
1036 | if (rp->rip6_vers != RIP6_VERSION1) { | |||
1037 | log_debug("Incorrect RIP version %d", rp->rip6_vers); | |||
1038 | return; | |||
1039 | } | |||
1040 | if (rp->rip6_cmd == RIP6_REQUEST1) { | |||
1041 | if (idx && idx < nindex2ifc) { | |||
1042 | ifcp = index2ifc[idx]; | |||
1043 | riprequest(ifcp, np, nn, &fsock); | |||
1044 | } else { | |||
1045 | riprequest(NULL((void*)0), np, nn, &fsock); | |||
1046 | } | |||
1047 | return; | |||
1048 | } | |||
1049 | ||||
1050 | if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)(((&fsock.sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&fsock.sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { | |||
1051 | log_debug("Response from non-ll addr: %s", | |||
1052 | inet6_n2p(&fsock.sin6_addr)); | |||
1053 | return; /* Ignore packets from non-link-local addr */ | |||
1054 | } | |||
1055 | if (ntohs(fsock.sin6_port)(__uint16_t)(__builtin_constant_p(fsock.sin6_port) ? (__uint16_t )(((__uint16_t)(fsock.sin6_port) & 0xffU) << 8 | (( __uint16_t)(fsock.sin6_port) & 0xff00U) >> 8) : __swap16md (fsock.sin6_port)) != RIP6_PORT521) { | |||
1056 | log_debug("Response from non-rip port from %s", | |||
1057 | inet6_n2p(&fsock.sin6_addr)); | |||
1058 | return; | |||
1059 | } | |||
1060 | if (IN6_IS_ADDR_MULTICAST(&pi->ipi6_addr)((&pi->ipi6_addr)->__u6_addr.__u6_addr8[0] == 0xff) && *hlimp != 255) { | |||
1061 | log_debug( | |||
1062 | "Response packet with a smaller hop limit (%d) from %s", | |||
1063 | *hlimp, inet6_n2p(&fsock.sin6_addr)); | |||
1064 | return; | |||
1065 | } | |||
1066 | /* | |||
1067 | * Further validation: since this program does not send off-link | |||
1068 | * requests, an incoming response must always come from an on-link | |||
1069 | * node. Although this is normally ensured by the source address | |||
1070 | * check above, it may not 100% be safe because there are router | |||
1071 | * implementations that (invalidly) allow a packet with a link-local | |||
1072 | * source address to be forwarded to a different link. | |||
1073 | * So we also check whether the destination address is a link-local | |||
1074 | * address or the hop limit is 255. Note that RFC2080 does not require | |||
1075 | * the specific hop limit for a unicast response, so we cannot assume | |||
1076 | * the limitation. | |||
1077 | */ | |||
1078 | if (!IN6_IS_ADDR_LINKLOCAL(&pi->ipi6_addr)(((&pi->ipi6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&pi->ipi6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80)) && *hlimp != 255) { | |||
1079 | log_debug( | |||
1080 | "Response packet possibly from an off-link node: " | |||
1081 | "from %s to %s hlim=%d", | |||
1082 | inet6_n2p(&fsock.sin6_addr), inet6_n2p(&pi->ipi6_addr), | |||
1083 | *hlimp); | |||
1084 | return; | |||
1085 | } | |||
1086 | ||||
1087 | idx = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr)((fsock.sin6_addr).__u6_addr.__u6_addr8[2] << 8 | (fsock .sin6_addr).__u6_addr.__u6_addr8[3]); | |||
1088 | ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL((void*)0); | |||
1089 | if (!ifcp) { | |||
1090 | log_debug("Packets to unknown interface index %d", idx); | |||
1091 | return; /* Ignore it */ | |||
1092 | } | |||
1093 | if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr)(memcmp(&(&ifcp->ifc_mylladdr)->__u6_addr.__u6_addr8 [0], &(&fsock.sin6_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) | |||
1094 | return; /* The packet is from me; ignore */ | |||
1095 | if (rp->rip6_cmd != RIP6_RESPONSE2) { | |||
1096 | log_debug("Invalid command %d", rp->rip6_cmd); | |||
1097 | return; | |||
1098 | } | |||
1099 | ||||
1100 | /* -N: no use */ | |||
1101 | if (iff_find(ifcp, 'N') != NULL((void*)0)) | |||
1102 | return; | |||
1103 | ||||
1104 | log_debug("Recv(%s): from %s.%d info(%zd)", | |||
1105 | ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port)(__uint16_t)(__builtin_constant_p(fsock.sin6_port) ? (__uint16_t )(((__uint16_t)(fsock.sin6_port) & 0xffU) << 8 | (( __uint16_t)(fsock.sin6_port) & 0xff00U) >> 8) : __swap16md (fsock.sin6_port)), nn); | |||
1106 | ||||
1107 | t = time(NULL((void*)0)); | |||
1108 | t_half_lifetime = t - (RIP_LIFETIME180/2); | |||
1109 | for (; nn; nn--, np++) { | |||
1110 | if (np->rip6_metric == NEXTHOP_METRIC0xff) { | |||
1111 | /* modify neighbor address */ | |||
1112 | if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { | |||
1113 | nh = np->rip6_dest; | |||
1114 | SET_IN6_LINKLOCAL_IFINDEX(nh, idx)do { (nh).__u6_addr.__u6_addr8[2] = ((idx) >> 8) & 0xff ; (nh).__u6_addr.__u6_addr8[3] = (idx) & 0xff; } while (0 ); | |||
1115 | log_debug("\tNexthop: %s", inet6_n2p(&nh)); | |||
1116 | } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0))) { | |||
1117 | nh = fsock.sin6_addr; | |||
1118 | log_debug("\tNexthop: %s", inet6_n2p(&nh)); | |||
1119 | } else { | |||
1120 | nh = fsock.sin6_addr; | |||
1121 | log_debug("\tInvalid Nexthop: %s", | |||
1122 | inet6_n2p(&np->rip6_dest)); | |||
1123 | } | |||
1124 | continue; | |||
1125 | } | |||
1126 | if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xff)) { | |||
1127 | log_debug("\tMulticast netinfo6: %s/%d [%d]", | |||
1128 | inet6_n2p(&np->rip6_dest), | |||
1129 | np->rip6_plen, np->rip6_metric); | |||
1130 | continue; | |||
1131 | } | |||
1132 | if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == (__uint32_t )(__builtin_constant_p(1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t )(1) & 0xff000000) >> 24) : __swap32md(1))))) { | |||
1133 | log_debug("\tLoopback netinfo6: %s/%d [%d]", | |||
1134 | inet6_n2p(&np->rip6_dest), | |||
1135 | np->rip6_plen, np->rip6_metric); | |||
1136 | continue; | |||
1137 | } | |||
1138 | if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { | |||
1139 | log_debug("\tLink Local netinfo6: %s/%d [%d]", | |||
1140 | inet6_n2p(&np->rip6_dest), | |||
1141 | np->rip6_plen, np->rip6_metric); | |||
1142 | continue; | |||
1143 | } | |||
1144 | /* may need to pass sitelocal prefix in some case, however*/ | |||
1145 | if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest)(((&np->rip6_dest)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&np->rip6_dest)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0xc0)) && !lflag) { | |||
1146 | log_debug("\tSite Local netinfo6: %s/%d [%d]", | |||
1147 | inet6_n2p(&np->rip6_dest), | |||
1148 | np->rip6_plen, np->rip6_metric); | |||
1149 | continue; | |||
1150 | } | |||
1151 | if (dflag >= 2) { | |||
1152 | log_enqueue("\tnetinfo6: %s/%d [%d]", | |||
1153 | inet6_n2p(&np->rip6_dest), | |||
1154 | np->rip6_plen, np->rip6_metric); | |||
1155 | if (np->rip6_tag) | |||
1156 | log_enqueue(" tag=0x%04x", | |||
1157 | ntohs(np->rip6_tag)(__uint16_t)(__builtin_constant_p(np->rip6_tag) ? (__uint16_t )(((__uint16_t)(np->rip6_tag) & 0xffU) << 8 | (( __uint16_t)(np->rip6_tag) & 0xff00U) >> 8) : __swap16md (np->rip6_tag)) & 0xffff); | |||
1158 | ia = np->rip6_dest; | |||
1159 | applyplen(&ia, np->rip6_plen); | |||
1160 | if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& np->rip6_dest)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) | |||
1161 | log_enqueue(" [junk outside prefix]"); | |||
1162 | } | |||
1163 | ||||
1164 | /* | |||
1165 | * -L: listen only if the prefix matches the configuration | |||
1166 | */ | |||
1167 | ok = 1; /* if there's no L filter, it is ok */ | |||
1168 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { | |||
1169 | if (iffp->iff_type != 'L') | |||
1170 | continue; | |||
1171 | ok = 0; | |||
1172 | if (np->rip6_plen < iffp->iff_plen) | |||
1173 | continue; | |||
1174 | /* special rule: ::/0 means default, not "in /0" */ | |||
1175 | if (iffp->iff_plen == 0 && np->rip6_plen > 0) | |||
1176 | continue; | |||
1177 | ia = np->rip6_dest; | |||
1178 | applyplen(&ia, iffp->iff_plen); | |||
1179 | if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)(memcmp(&(&ia)->__u6_addr.__u6_addr8[0], &(& iffp->iff_addr)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) { | |||
1180 | ok = 1; | |||
1181 | break; | |||
1182 | } | |||
1183 | } | |||
1184 | ||||
1185 | if (!ok) { | |||
1186 | if (dflag >= 2) | |||
1187 | log_debug(" (filtered)"); | |||
1188 | continue; | |||
1189 | } | |||
1190 | ||||
1191 | if (dflag >= 2) | |||
1192 | log_debug(""); | |||
1193 | ||||
1194 | np->rip6_metric++; | |||
1195 | np->rip6_metric += ifcp->ifc_metric; | |||
1196 | if (np->rip6_metric > HOPCNT_INFINITY616) | |||
1197 | np->rip6_metric = HOPCNT_INFINITY616; | |||
1198 | ||||
1199 | applyplen(&np->rip6_dest, np->rip6_plen); | |||
1200 | if ((rrt = rtsearch(np, NULL((void*)0))) != NULL((void*)0)) { | |||
1201 | if (rrt->rrt_t == 0) | |||
1202 | continue; /* Intf route has priority */ | |||
1203 | nq = &rrt->rrt_info; | |||
1204 | if (nq->rip6_metric > np->rip6_metric) { | |||
1205 | if (rrt->rrt_index == ifcp->ifc_index && | |||
1206 | IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)(memcmp(&(&nh)->__u6_addr.__u6_addr8[0], &(& rrt->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { | |||
1207 | /* Small metric from the same gateway */ | |||
1208 | nq->rip6_metric = np->rip6_metric; | |||
1209 | } else { | |||
1210 | /* Better route found */ | |||
1211 | rrt->rrt_index = ifcp->ifc_index; | |||
1212 | /* Update routing table */ | |||
1213 | delroute(nq, &rrt->rrt_gw); | |||
1214 | rrt->rrt_gw = nh; | |||
1215 | *nq = *np; | |||
1216 | addroute(rrt, &nh, ifcp); | |||
1217 | } | |||
1218 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; | |||
1219 | rrt->rrt_t = t; | |||
1220 | need_trigger = 1; | |||
1221 | } else if (nq->rip6_metric < np->rip6_metric && | |||
1222 | rrt->rrt_index == ifcp->ifc_index && | |||
1223 | IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)(memcmp(&(&nh)->__u6_addr.__u6_addr8[0], &(& rrt->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { | |||
1224 | /* Got worse route from same gw */ | |||
1225 | nq->rip6_metric = np->rip6_metric; | |||
1226 | rrt->rrt_t = t; | |||
1227 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; | |||
1228 | need_trigger = 1; | |||
1229 | } else if (nq->rip6_metric == np->rip6_metric && | |||
1230 | np->rip6_metric < HOPCNT_INFINITY616) { | |||
1231 | if (rrt->rrt_index == ifcp->ifc_index && | |||
1232 | IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)(memcmp(&(&nh)->__u6_addr.__u6_addr8[0], &(& rrt->rrt_gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { | |||
1233 | /* same metric, same route from same gw */ | |||
1234 | rrt->rrt_t = t; | |||
1235 | } else if (rrt->rrt_t < t_half_lifetime) { | |||
1236 | /* Better route found */ | |||
1237 | rrt->rrt_index = ifcp->ifc_index; | |||
1238 | /* Update routing table */ | |||
1239 | delroute(nq, &rrt->rrt_gw); | |||
1240 | rrt->rrt_gw = nh; | |||
1241 | *nq = *np; | |||
1242 | addroute(rrt, &nh, ifcp); | |||
1243 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; | |||
1244 | rrt->rrt_t = t; | |||
1245 | } | |||
1246 | } | |||
1247 | /* | |||
1248 | * if nq->rip6_metric == HOPCNT_INFINITY6 then | |||
1249 | * do not update age value. Do nothing. | |||
1250 | */ | |||
1251 | } else if (np->rip6_metric < HOPCNT_INFINITY616) { | |||
1252 | /* Got a new valid route */ | |||
1253 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void*)0)) { | |||
1254 | fatal("calloc: struct riprt"); | |||
1255 | /*NOTREACHED*/ | |||
1256 | } | |||
1257 | nq = &rrt->rrt_info; | |||
1258 | ||||
1259 | rrt->rrt_index = ifcp->ifc_index; | |||
1260 | rrt->rrt_flags = RTF_UP0x1|RTF_GATEWAY0x2; | |||
1261 | rrt->rrt_gw = nh; | |||
1262 | *nq = *np; | |||
1263 | applyplen(&nq->rip6_dest, nq->rip6_plen); | |||
1264 | if (nq->rip6_plen == sizeof(struct in6_addr) * 8) | |||
1265 | rrt->rrt_flags |= RTF_HOST0x4; | |||
1266 | ||||
1267 | /* Put the route to the list */ | |||
1268 | rrt->rrt_next = riprt; | |||
1269 | riprt = rrt; | |||
1270 | /* Update routing table */ | |||
1271 | addroute(rrt, &nh, ifcp); | |||
1272 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; | |||
1273 | need_trigger = 1; | |||
1274 | rrt->rrt_t = t; | |||
1275 | } | |||
1276 | } | |||
1277 | /* XXX need to care the interval between triggered updates */ | |||
1278 | if (need_trigger) { | |||
1279 | if (nextalarm > time(NULL((void*)0)) + RIP_TRIG_INT6_MAX5) { | |||
1280 | for (ic = ifc; ic; ic = ic->ifc_next) { | |||
1281 | if (ifcp->ifc_index == ic->ifc_index) | |||
1282 | continue; | |||
1283 | if (ic->ifc_flags & IFF_UP0x1) | |||
1284 | ripsend(ic, &ic->ifc_ripsin, | |||
1285 | RRTF_CHANGED0x80000000); | |||
1286 | } | |||
1287 | } | |||
1288 | /* Reset the flag */ | |||
1289 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) | |||
1290 | rrt->rrt_rflags &= ~RRTF_CHANGED0x80000000; | |||
1291 | } | |||
1292 | } | |||
1293 | ||||
1294 | /* | |||
1295 | * Send all routes request packet to the specified interface. | |||
1296 | */ | |||
1297 | void | |||
1298 | sendrequest(struct ifc *ifcp) | |||
1299 | { | |||
1300 | struct netinfo6 *np; | |||
1301 | int error; | |||
1302 | ||||
1303 | if (ifcp->ifc_flags & IFF_LOOPBACK0x8) | |||
1304 | return; | |||
1305 | ripbuf->rip6_cmd = RIP6_REQUEST1; | |||
1306 | np = ripbuf->rip6_netsrip6un.ru6_nets; | |||
1307 | memset(np, 0, sizeof(struct netinfo6)); | |||
1308 | np->rip6_metric = HOPCNT_INFINITY616; | |||
1309 | log_debug("Send rtdump Request to %s (%s)", | |||
1310 | ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); | |||
1311 | error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1)(sizeof(struct rip6) + ((1)-1) * sizeof(struct netinfo6))); | |||
1312 | if (error == EAFNOSUPPORT47) { | |||
1313 | /* Protocol not supported */ | |||
1314 | log_debug("Could not send rtdump Request to %s (%s): " | |||
1315 | "set IFF_UP to 0", | |||
1316 | ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr)); | |||
1317 | ifcp->ifc_flags &= ~IFF_UP0x1; /* As if down for AF_INET6 */ | |||
1318 | } | |||
1319 | ripbuf->rip6_cmd = RIP6_RESPONSE2; | |||
1320 | } | |||
1321 | ||||
1322 | /* | |||
1323 | * Process a RIP6_REQUEST packet. | |||
1324 | */ | |||
1325 | void | |||
1326 | riprequest(struct ifc *ifcp, struct netinfo6 *np, int nn, | |||
1327 | struct sockaddr_in6 *sin6) | |||
1328 | { | |||
1329 | int i; | |||
1330 | struct riprt *rrt; | |||
1331 | ||||
1332 | if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)((*(const u_int32_t *)(const void *)(&(&np->rip6_dest )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&np->rip6_dest)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& np->rip6_dest)->__u6_addr.__u6_addr8[12]) == 0)) && | |||
1333 | np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY616)) { | |||
1334 | /* Specific response, don't split-horizon */ | |||
1335 | log_debug("\tRIP Request"); | |||
1336 | for (i = 0; i < nn; i++, np++) { | |||
1337 | rrt = rtsearch(np, NULL((void*)0)); | |||
1338 | if (rrt) | |||
1339 | np->rip6_metric = rrt->rrt_info.rip6_metric; | |||
1340 | else | |||
1341 | np->rip6_metric = HOPCNT_INFINITY616; | |||
1342 | } | |||
1343 | (void)sendpacket(sin6, RIPSIZE(nn)(sizeof(struct rip6) + ((nn)-1) * sizeof(struct netinfo6))); | |||
1344 | return; | |||
1345 | } | |||
1346 | /* Whole routing table dump */ | |||
1347 | log_debug("\tRIP Request -- whole routing table"); | |||
1348 | ripsend(ifcp, sin6, RRTF_SENDANYWAY0x40000000); | |||
1349 | } | |||
1350 | ||||
1351 | /* | |||
1352 | * Get information of each interface. | |||
1353 | */ | |||
1354 | void | |||
1355 | ifconfig(void) | |||
1356 | { | |||
1357 | struct ifaddrs *ifap, *ifa; | |||
1358 | struct ifc *ifcp; | |||
1359 | struct ipv6_mreq mreq; | |||
1360 | int s; | |||
1361 | ||||
1362 | if ((s = socket(AF_INET624, SOCK_DGRAM2, 0)) == -1) { | |||
1363 | fatal("socket"); | |||
1364 | /*NOTREACHED*/ | |||
1365 | } | |||
1366 | ||||
1367 | if (getifaddrs(&ifap) != 0) { | |||
1368 | fatal("getifaddrs"); | |||
1369 | /*NOTREACHED*/ | |||
1370 | } | |||
1371 | ||||
1372 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { | |||
1373 | if (ifa->ifa_addr == NULL((void*)0) || | |||
1374 | ifa->ifa_addr->sa_family != AF_INET624) | |||
1375 | continue; | |||
1376 | ifcp = ifc_find(ifa->ifa_name); | |||
1377 | /* we are interested in multicast-capable interfaces */ | |||
1378 | if ((ifa->ifa_flags & IFF_MULTICAST0x8000) == 0) | |||
1379 | continue; | |||
1380 | if (!ifcp) { | |||
1381 | /* new interface */ | |||
1382 | if ((ifcp = calloc(1, sizeof(struct ifc))) == NULL((void*)0)) { | |||
1383 | fatal("calloc: struct ifc"); | |||
1384 | /*NOTREACHED*/ | |||
1385 | } | |||
1386 | ifcp->ifc_index = -1; | |||
1387 | ifcp->ifc_next = ifc; | |||
1388 | ifc = ifcp; | |||
1389 | nifc++; | |||
1390 | ifcp->ifc_name = xstrdup(ifa->ifa_name); | |||
1391 | ifcp->ifc_addr = 0; | |||
1392 | ifcp->ifc_filter = 0; | |||
1393 | ifcp->ifc_flags = ifa->ifa_flags; | |||
1394 | log_debug("newif %s <%s>", ifcp->ifc_name, | |||
1395 | ifflags(ifcp->ifc_flags)); | |||
1396 | if (!strcmp(ifcp->ifc_name, LOOPBACK_IF"lo0")) | |||
1397 | loopifcp = ifcp; | |||
1398 | } else { | |||
1399 | /* update flag, this may be up again */ | |||
1400 | if (ifcp->ifc_flags != ifa->ifa_flags) { | |||
1401 | log_enqueue("%s: <%s> -> ", ifcp->ifc_name, | |||
1402 | ifflags(ifcp->ifc_flags)); | |||
1403 | log_debug("<%s>", ifflags(ifa->ifa_flags)); | |||
1404 | ifcp->ifc_cflags |= IFC_CHANGED1; | |||
1405 | } | |||
1406 | ifcp->ifc_flags = ifa->ifa_flags; | |||
1407 | } | |||
1408 | ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s); | |||
1409 | if ((ifcp->ifc_flags & (IFF_LOOPBACK0x8 | IFF_UP0x1)) == IFF_UP0x1 | |||
1410 | && 0 < ifcp->ifc_index && !ifcp->ifc_joined) { | |||
1411 | mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr; | |||
1412 | mreq.ipv6mr_interface = ifcp->ifc_index; | |||
1413 | if (setsockopt(ripsock, IPPROTO_IPV641, IPV6_JOIN_GROUP12, | |||
1414 | &mreq, sizeof(mreq)) == -1) { | |||
1415 | fatalx("IPV6_JOIN_GROUP"); | |||
1416 | /*NOTREACHED*/ | |||
1417 | } | |||
1418 | log_debug("join %s %s", ifcp->ifc_name, RIP6_DEST"ff02::9"); | |||
1419 | ifcp->ifc_joined++; | |||
1420 | } | |||
1421 | } | |||
1422 | close(s); | |||
1423 | freeifaddrs(ifap); | |||
1424 | } | |||
1425 | ||||
1426 | void | |||
1427 | ifconfig1(const char *name, const struct sockaddr *sa, struct ifc *ifcp, int s) | |||
1428 | { | |||
1429 | struct in6_ifreq ifr; | |||
1430 | const struct sockaddr_in6 *sin6; | |||
1431 | struct ifac *ifa; | |||
1432 | int plen; | |||
1433 | char buf[BUFSIZ1024]; | |||
1434 | ||||
1435 | sin6 = (const struct sockaddr_in6 *)sa; | |||
1436 | if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)(((&sin6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sin6->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0xc0)) && !lflag) | |||
1437 | return; | |||
1438 | ifr.ifr_addrifr_ifru.ifru_addr = *sin6; | |||
1439 | strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); | |||
1440 | if (ioctl(s, SIOCGIFNETMASK_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct in6_ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((37))), (char *)&ifr) == -1) { | |||
1441 | fatal("ioctl: SIOCGIFNETMASK_IN6"); | |||
1442 | /*NOTREACHED*/ | |||
1443 | } | |||
1444 | plen = sin6mask2len(&ifr.ifr_addrifr_ifru.ifru_addr); | |||
1445 | if ((ifa = ifa_match(ifcp, &sin6->sin6_addr, plen)) != NULL((void*)0)) { | |||
1446 | /* same interface found */ | |||
1447 | /* need check if something changed */ | |||
1448 | /* XXX not yet implemented */ | |||
1449 | return; | |||
1450 | } | |||
1451 | /* | |||
1452 | * New address is found | |||
1453 | */ | |||
1454 | if ((ifa = calloc(1, sizeof(struct ifac))) == NULL((void*)0)) { | |||
1455 | fatal("calloc: struct ifac"); | |||
1456 | /*NOTREACHED*/ | |||
1457 | } | |||
1458 | ifa->ifa_conf = ifcp; | |||
1459 | ifa->ifa_next = ifcp->ifc_addr; | |||
1460 | ifcp->ifc_addr = ifa; | |||
1461 | ifa->ifa_addr = sin6->sin6_addr; | |||
1462 | ifa->ifa_plen = plen; | |||
1463 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { | |||
1464 | ifr.ifr_addrifr_ifru.ifru_addr = *sin6; | |||
1465 | if (ioctl(s, SIOCGIFDSTADDR_IN6(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct in6_ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((34))), (char *)&ifr) == -1) { | |||
1466 | fatal("ioctl: SIOCGIFDSTADDR_IN6"); | |||
1467 | /*NOTREACHED*/ | |||
1468 | } | |||
1469 | ifa->ifa_raddr = ifr.ifr_dstaddrifr_ifru.ifru_dstaddr.sin6_addr; | |||
1470 | inet_ntop(AF_INET624, (void *)&ifa->ifa_raddr, buf, sizeof(buf)); | |||
1471 | log_debug("found address %s/%d -- %s", | |||
1472 | inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf); | |||
1473 | } else { | |||
1474 | log_debug("found address %s/%d", | |||
1475 | inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen); | |||
1476 | } | |||
1477 | if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)(((&ifa->ifa_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ifa->ifa_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { | |||
1478 | ifcp->ifc_mylladdr = ifa->ifa_addr; | |||
1479 | ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr)((ifa->ifa_addr).__u6_addr.__u6_addr8[2] << 8 | (ifa ->ifa_addr).__u6_addr.__u6_addr8[3]); | |||
1480 | memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len); | |||
1481 | SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr,do { (ifcp->ifc_ripsin.sin6_addr).__u6_addr.__u6_addr8[2] = ((ifcp->ifc_index) >> 8) & 0xff; (ifcp->ifc_ripsin .sin6_addr).__u6_addr.__u6_addr8[3] = (ifcp->ifc_index) & 0xff; } while (0) | |||
1482 | ifcp->ifc_index)do { (ifcp->ifc_ripsin.sin6_addr).__u6_addr.__u6_addr8[2] = ((ifcp->ifc_index) >> 8) & 0xff; (ifcp->ifc_ripsin .sin6_addr).__u6_addr.__u6_addr8[3] = (ifcp->ifc_index) & 0xff; } while (0); | |||
1483 | setindex2ifc(ifcp->ifc_index, ifcp); | |||
1484 | ifcp->ifc_mtu = getifmtu(ifcp->ifc_index); | |||
1485 | if (ifcp->ifc_mtu > RIP6_MAXMTU1500) | |||
1486 | ifcp->ifc_mtu = RIP6_MAXMTU1500; | |||
1487 | if (ioctl(s, SIOCGIFMETRIC(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifreq) & 0x1fff) << 16) | ((('i')) << 8) | ((23))), (char *)&ifr) == -1) { | |||
1488 | fatal("ioctl: SIOCGIFMETRIC"); | |||
1489 | /*NOTREACHED*/ | |||
1490 | } | |||
1491 | ifcp->ifc_metric = ifr.ifr_metricifr_ifru.ifru_metric; | |||
1492 | log_debug("\tindex: %d, mtu: %d, metric: %d", | |||
1493 | ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric); | |||
1494 | } else | |||
1495 | ifcp->ifc_cflags |= IFC_CHANGED1; | |||
1496 | } | |||
1497 | ||||
1498 | /* | |||
1499 | * Receive and process routing messages. | |||
1500 | * Update interface information as necesssary. | |||
1501 | */ | |||
1502 | void | |||
1503 | rtrecv(void) | |||
1504 | { | |||
1505 | char buf[BUFSIZ1024]; | |||
1506 | char *p, *q; | |||
1507 | struct rt_msghdr *rtm; | |||
1508 | struct ifa_msghdr *ifam; | |||
1509 | struct if_msghdr *ifm; | |||
1510 | int len; | |||
1511 | struct ifc *ifcp, *ic; | |||
1512 | int iface = 0, rtable = 0; | |||
1513 | struct sockaddr_in6 *rta[RTAX_MAX15]; | |||
1514 | struct sockaddr_in6 mask; | |||
1515 | int i, addrs; | |||
1516 | struct riprt *rrt; | |||
1517 | ||||
1518 | if ((len = read(rtsock, buf, sizeof(buf))) == -1) { | |||
1519 | perror("read from rtsock"); | |||
1520 | exit(1); | |||
1521 | } | |||
1522 | if (len < sizeof(*rtm)) { | |||
1523 | log_debug("short read from rtsock: %d (should be > %zu)", | |||
1524 | len, sizeof(*rtm)); | |||
1525 | return; | |||
1526 | } | |||
1527 | if (dflag >= 2) { | |||
1528 | log_debug("rtmsg:"); | |||
1529 | for (i = 0; i < len; i++) { | |||
1530 | log_enqueue("%02x ", buf[i] & 0xff); | |||
1531 | if (i % 16 == 15) | |||
1532 | log_debug(""); | |||
1533 | } | |||
1534 | log_debug(""); | |||
1535 | } | |||
1536 | ||||
1537 | p = buf; | |||
1538 | /* safety against bogus message */ | |||
1539 | if (((struct rt_msghdr *)p)->rtm_msglen <= 0) { | |||
1540 | log_debug("bogus rtmsg: length=%d", | |||
1541 | ((struct rt_msghdr *)p)->rtm_msglen); | |||
1542 | return; | |||
1543 | } | |||
1544 | if (((struct rt_msghdr *)p)->rtm_version != RTM_VERSION5) | |||
1545 | return; | |||
1546 | ||||
1547 | rtm = NULL((void*)0); | |||
1548 | ifam = NULL((void*)0); | |||
1549 | ifm = NULL((void*)0); | |||
1550 | switch (((struct rt_msghdr *)p)->rtm_type) { | |||
1551 | case RTM_NEWADDR0xc: | |||
1552 | case RTM_DELADDR0xd: | |||
1553 | ifam = (struct ifa_msghdr *)p; | |||
1554 | addrs = ifam->ifam_addrs; | |||
1555 | q = (char *)(ifam + 1); | |||
1556 | break; | |||
1557 | case RTM_IFINFO0xe: | |||
1558 | ifm = (struct if_msghdr *)p; | |||
1559 | addrs = ifm->ifm_addrs; | |||
1560 | q = (char *)(ifm + 1); | |||
1561 | break; | |||
1562 | default: | |||
1563 | rtm = (struct rt_msghdr *)p; | |||
1564 | addrs = rtm->rtm_addrs; | |||
1565 | q = (char *)(p + rtm->rtm_hdrlen); | |||
1566 | if (rtm->rtm_pid == pid) { | |||
1567 | #if 0 | |||
1568 | log_debug("rtmsg looped back to me, ignored"); | |||
1569 | #endif | |||
1570 | return; | |||
1571 | } | |||
1572 | break; | |||
1573 | } | |||
1574 | memset(&rta, 0, sizeof(rta)); | |||
1575 | for (i = 0; i < RTAX_MAX15; i++) { | |||
1576 | if (addrs & (1 << i)) { | |||
1577 | rta[i] = (struct sockaddr_in6 *)q; | |||
1578 | q += ROUNDUP(rta[i]->sin6_len)((rta[i]->sin6_len) > 0 ? (1 + (((rta[i]->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long)); | |||
1579 | } | |||
1580 | } | |||
1581 | ||||
1582 | log_debug("rtsock: %s (addrs=%x)", | |||
1583 | rttypes((struct rt_msghdr *)p), addrs); | |||
1584 | if (dflag >= 2) { | |||
1585 | for (i = 0; | |||
1586 | i < ((struct rt_msghdr *)p)->rtm_msglen; | |||
1587 | i++) { | |||
1588 | log_enqueue("%02x ", p[i] & 0xff); | |||
1589 | if (i % 16 == 15) | |||
1590 | log_debug(""); | |||
1591 | } | |||
1592 | log_debug(""); | |||
1593 | } | |||
1594 | /* | |||
1595 | * Easy ones first. | |||
1596 | * | |||
1597 | * We may be able to optimize by using ifm->ifm_index or | |||
1598 | * ifam->ifam_index. For simplicity we don't do that here. | |||
1599 | */ | |||
1600 | switch (((struct rt_msghdr *)p)->rtm_type) { | |||
1601 | case RTM_NEWADDR0xc: | |||
1602 | case RTM_IFINFO0xe: | |||
1603 | iface++; | |||
1604 | return; | |||
1605 | case RTM_ADD0x1: | |||
1606 | rtable++; | |||
1607 | return; | |||
1608 | case RTM_MISS0x7: | |||
1609 | case RTM_RESOLVE0xb: | |||
1610 | case RTM_GET0x4: | |||
1611 | /* nothing to be done here */ | |||
1612 | log_debug("\tnothing to be done, ignored"); | |||
1613 | return; | |||
1614 | } | |||
1615 | ||||
1616 | #if 0 | |||
1617 | if (rta[RTAX_DST0] == NULL((void*)0)) { | |||
1618 | log_debug("\tno destination, ignored"); | |||
1619 | return; | |||
1620 | } | |||
1621 | if (rta[RTAX_DST0]->sin6_family != AF_INET624) { | |||
1622 | log_debug("\taf mismatch, ignored"); | |||
1623 | return; | |||
1624 | } | |||
1625 | if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)(((&rta[0]->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&rta[0]->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { | |||
1626 | log_debug("\tlinklocal destination, ignored"); | |||
1627 | return; | |||
1628 | } | |||
1629 | if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)(memcmp(&(&rta[0]->sin6_addr)->__u6_addr.__u6_addr8 [0], &(&in6addr_loopback)->__u6_addr.__u6_addr8[0] , sizeof(struct in6_addr)) == 0)) { | |||
1630 | log_debug("\tloopback destination, ignored"); | |||
1631 | return; /* Loopback */ | |||
1632 | } | |||
1633 | if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)((&rta[0]->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { | |||
1634 | log_debug("\tmulticast destination, ignored"); | |||
1635 | return; | |||
1636 | } | |||
1637 | #endif | |||
1638 | ||||
1639 | /* hard ones */ | |||
1640 | switch (((struct rt_msghdr *)p)->rtm_type) { | |||
1641 | case RTM_NEWADDR0xc: | |||
1642 | case RTM_IFINFO0xe: | |||
1643 | case RTM_ADD0x1: | |||
1644 | case RTM_MISS0x7: | |||
1645 | case RTM_RESOLVE0xb: | |||
1646 | case RTM_GET0x4: | |||
1647 | /* should already be handled */ | |||
1648 | fatalx("rtrecv: never reach here"); | |||
1649 | /*NOTREACHED*/ | |||
1650 | case RTM_DELETE0x2: | |||
1651 | if (!rta[RTAX_DST0] || !rta[RTAX_GATEWAY1]) { | |||
1652 | log_debug("\tsome of dst/gw/netmask are " | |||
1653 | "unavailable, ignored"); | |||
1654 | break; | |||
1655 | } | |||
1656 | if ((rtm->rtm_flags & RTF_HOST0x4) != 0) { | |||
1657 | mask.sin6_len = sizeof(mask); | |||
1658 | memset(&mask.sin6_addr, 0xff, | |||
1659 | sizeof(mask.sin6_addr)); | |||
1660 | rta[RTAX_NETMASK2] = &mask; | |||
1661 | } else if (!rta[RTAX_NETMASK2]) { | |||
1662 | log_debug("\tsome of dst/gw/netmask are " | |||
1663 | "unavailable, ignored"); | |||
1664 | break; | |||
1665 | } | |||
1666 | if (rt_del(rta[RTAX_DST0], rta[RTAX_GATEWAY1], | |||
1667 | rta[RTAX_NETMASK2]) == 0) { | |||
1668 | rtable++; /*just to be sure*/ | |||
1669 | } | |||
1670 | break; | |||
1671 | case RTM_CHANGE0x3: | |||
1672 | case RTM_REDIRECT0x6: | |||
1673 | log_debug("\tnot supported yet, ignored"); | |||
1674 | break; | |||
1675 | case RTM_DELADDR0xd: | |||
1676 | if (!rta[RTAX_NETMASK2] || !rta[RTAX_IFA5]) { | |||
1677 | log_debug("\tno netmask or ifa given, ignored"); | |||
1678 | break; | |||
1679 | } | |||
1680 | if (ifam->ifam_index < nindex2ifc) | |||
1681 | ifcp = index2ifc[ifam->ifam_index]; | |||
1682 | else | |||
1683 | ifcp = NULL((void*)0); | |||
1684 | if (!ifcp) { | |||
1685 | log_debug("\tinvalid ifam_index %d, ignored", | |||
1686 | ifam->ifam_index); | |||
1687 | break; | |||
1688 | } | |||
1689 | if (!rt_deladdr(ifcp, rta[RTAX_IFA5], rta[RTAX_NETMASK2])) | |||
1690 | iface++; | |||
1691 | break; | |||
1692 | } | |||
1693 | ||||
1694 | if (iface) { | |||
1695 | log_debug("rtsock: reconfigure interfaces, refresh interface routes"); | |||
1696 | ifconfig(); | |||
1697 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) | |||
1698 | if (ifcp->ifc_cflags & IFC_CHANGED1) { | |||
1699 | if (ifrt(ifcp, 1)) { | |||
1700 | for (ic = ifc; ic; ic = ic->ifc_next) { | |||
1701 | if (ifcp->ifc_index == ic->ifc_index) | |||
1702 | continue; | |||
1703 | if (ic->ifc_flags & IFF_UP0x1) | |||
1704 | ripsend(ic, &ic->ifc_ripsin, | |||
1705 | RRTF_CHANGED0x80000000); | |||
1706 | } | |||
1707 | /* Reset the flag */ | |||
1708 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) | |||
1709 | rrt->rrt_rflags &= ~RRTF_CHANGED0x80000000; | |||
1710 | } | |||
1711 | ifcp->ifc_cflags &= ~IFC_CHANGED1; | |||
1712 | } | |||
1713 | } | |||
1714 | if (rtable) { | |||
1715 | log_debug("rtsock: read routing table again"); | |||
1716 | krtread(1); | |||
1717 | } | |||
1718 | } | |||
1719 | ||||
1720 | /* | |||
1721 | * remove specified route from the internal routing table. | |||
1722 | */ | |||
1723 | int | |||
1724 | rt_del(const struct sockaddr_in6 *sdst, const struct sockaddr_in6 *sgw, | |||
1725 | const struct sockaddr_in6 *smask) | |||
1726 | { | |||
1727 | const struct in6_addr *dst = NULL((void*)0); | |||
1728 | const struct in6_addr *gw = NULL((void*)0); | |||
1729 | int prefix; | |||
1730 | struct netinfo6 ni6; | |||
1731 | struct riprt *rrt = NULL((void*)0); | |||
1732 | time_t t_lifetime; | |||
1733 | ||||
1734 | if (sdst->sin6_family != AF_INET624) { | |||
1735 | log_debug("\tother AF, ignored"); | |||
1736 | return -1; | |||
1737 | } | |||
1738 | if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr)(((&sdst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&sdst->sin6_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80)) | |||
1739 | || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback)(memcmp(&(&sdst->sin6_addr)->__u6_addr.__u6_addr8 [0], &(&in6addr_loopback)->__u6_addr.__u6_addr8[0] , sizeof(struct in6_addr)) == 0) | |||
1740 | || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)((&sdst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { | |||
1741 | log_debug("\taddress %s not interesting, ignored", | |||
1742 | inet6_n2p(&sdst->sin6_addr)); | |||
1743 | return -1; | |||
1744 | } | |||
1745 | dst = &sdst->sin6_addr; | |||
1746 | if (sgw->sin6_family == AF_INET624) { | |||
1747 | /* easy case */ | |||
1748 | gw = &sgw->sin6_addr; | |||
1749 | prefix = sin6mask2len(smask); | |||
1750 | } else if (sgw->sin6_family == AF_LINK18) { | |||
1751 | /* | |||
1752 | * Interface route... a hard case. We need to get the prefix | |||
1753 | * length from the kernel, but we now are parsing rtmsg. | |||
1754 | * We'll purge matching routes from my list, then get the | |||
1755 | * fresh list. | |||
1756 | */ | |||
1757 | struct riprt *longest; | |||
1758 | log_debug("\t%s is a interface route, guessing prefixlen", | |||
1759 | inet6_n2p(dst)); | |||
1760 | longest = NULL((void*)0); | |||
1761 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { | |||
1762 | if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&sdst->sin6_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) | |||
1763 | &sdst->sin6_addr)(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&sdst->sin6_addr)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) | |||
1764 | && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == (__uint32_t)(__builtin_constant_p (1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t)(1) & 0xff000000 ) >> 24) : __swap32md(1))))) { | |||
1765 | if (!longest | |||
1766 | || longest->rrt_info.rip6_plen < | |||
1767 | rrt->rrt_info.rip6_plen) { | |||
1768 | longest = rrt; | |||
1769 | } | |||
1770 | } | |||
1771 | } | |||
1772 | rrt = longest; | |||
1773 | if (!rrt) { | |||
1774 | log_debug("\tno matching interface route found"); | |||
1775 | return -1; | |||
1776 | } | |||
1777 | gw = &in6addr_loopback; | |||
1778 | prefix = rrt->rrt_info.rip6_plen; | |||
1779 | } else { | |||
1780 | log_debug("\tunsupported af: (gw=%d)", sgw->sin6_family); | |||
1781 | return -1; | |||
1782 | } | |||
1783 | ||||
1784 | log_enqueue("\tdeleting %s/%d ", inet6_n2p(dst), prefix); | |||
1785 | log_debug("gw %s", inet6_n2p(gw)); | |||
1786 | t_lifetime = time(NULL((void*)0)) - RIP_LIFETIME180; | |||
1787 | /* age route for interface address */ | |||
1788 | memset(&ni6, 0, sizeof(ni6)); | |||
1789 | ni6.rip6_dest = *dst; | |||
1790 | ni6.rip6_plen = prefix; | |||
1791 | applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ | |||
1792 | log_debug("\tfind route %s/%d", inet6_n2p(&ni6.rip6_dest), | |||
1793 | ni6.rip6_plen); | |||
1794 | if (!rrt && (rrt = rtsearch(&ni6, NULL((void*)0))) == NULL((void*)0)) { | |||
1795 | log_debug("\tno route found"); | |||
1796 | return -1; | |||
1797 | } | |||
1798 | #if 0 | |||
1799 | if ((rrt->rrt_flags & RTF_STATIC0x800) == 0) { | |||
1800 | log_debug("\tyou can delete static routes only"); | |||
1801 | } else | |||
1802 | #endif | |||
1803 | if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)(memcmp(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8[0 ], &(gw)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0)) { | |||
1804 | log_enqueue("\tgw mismatch: %s <-> ", | |||
1805 | inet6_n2p(&rrt->rrt_gw)); | |||
1806 | log_debug("%s", inet6_n2p(gw)); | |||
1807 | } else { | |||
1808 | log_debug("\troute found, age it"); | |||
1809 | if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { | |||
1810 | rrt->rrt_t = t_lifetime; | |||
1811 | rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; | |||
1812 | } | |||
1813 | } | |||
1814 | return 0; | |||
1815 | } | |||
1816 | ||||
1817 | /* | |||
1818 | * remove specified address from internal interface/routing table. | |||
1819 | */ | |||
1820 | int | |||
1821 | rt_deladdr(struct ifc *ifcp, const struct sockaddr_in6 *sifa, | |||
1822 | const struct sockaddr_in6 *smask) | |||
1823 | { | |||
1824 | const struct in6_addr *addr = NULL((void*)0); | |||
1825 | int prefix; | |||
1826 | struct ifac *ifa = NULL((void*)0); | |||
1827 | struct netinfo6 ni6; | |||
1828 | struct riprt *rrt = NULL((void*)0); | |||
1829 | time_t t_lifetime; | |||
1830 | int updated = 0; | |||
1831 | ||||
1832 | if (sifa->sin6_family != AF_INET624) { | |||
1833 | log_debug("\tother AF, ignored"); | |||
1834 | return -1; | |||
1835 | } | |||
1836 | addr = &sifa->sin6_addr; | |||
1837 | prefix = sin6mask2len(smask); | |||
1838 | ||||
1839 | log_debug("\tdeleting %s/%d from %s", | |||
1840 | inet6_n2p(addr), prefix, ifcp->ifc_name); | |||
1841 | ifa = ifa_match(ifcp, addr, prefix); | |||
1842 | if (!ifa) { | |||
1843 | log_debug("\tno matching ifa found for %s/%d on %s", | |||
1844 | inet6_n2p(addr), prefix, ifcp->ifc_name); | |||
1845 | return -1; | |||
1846 | } | |||
1847 | if (ifa->ifa_conf != ifcp) { | |||
1848 | log_debug("\taddress table corrupt: back pointer does not match " | |||
1849 | "(%s != %s)", | |||
1850 | ifcp->ifc_name, ifa->ifa_conf->ifc_name); | |||
1851 | return -1; | |||
1852 | } | |||
1853 | /* remove ifa from interface */ | |||
1854 | if (ifcp->ifc_addr == ifa) | |||
1855 | ifcp->ifc_addr = ifa->ifa_next; | |||
1856 | else { | |||
1857 | struct ifac *p; | |||
1858 | for (p = ifcp->ifc_addr; p; p = p->ifa_next) { | |||
1859 | if (p->ifa_next == ifa) { | |||
1860 | p->ifa_next = ifa->ifa_next; | |||
1861 | break; | |||
1862 | } | |||
1863 | } | |||
1864 | } | |||
1865 | ifa->ifa_next = NULL((void*)0); | |||
1866 | ifa->ifa_conf = NULL((void*)0); | |||
1867 | t_lifetime = time(NULL((void*)0)) - RIP_LIFETIME180; | |||
1868 | /* age route for interface address */ | |||
1869 | memset(&ni6, 0, sizeof(ni6)); | |||
1870 | ni6.rip6_dest = ifa->ifa_addr; | |||
1871 | ni6.rip6_plen = ifa->ifa_plen; | |||
1872 | applyplen(&ni6.rip6_dest, ni6.rip6_plen); | |||
1873 | log_debug("\tfind interface route %s/%d on %d", | |||
1874 | inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index); | |||
1875 | if ((rrt = rtsearch(&ni6, NULL((void*)0))) != NULL((void*)0)) { | |||
1876 | struct in6_addr none; | |||
1877 | memset(&none, 0, sizeof(none)); | |||
1878 | if (rrt->rrt_index == ifcp->ifc_index && | |||
1879 | (IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none)(memcmp(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8[0 ], &(&none)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0) || | |||
1880 | IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == (__uint32_t)(__builtin_constant_p (1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t)(1) & 0xff000000 ) >> 24) : __swap32md(1)))))) { | |||
1881 | log_debug("\troute found, age it"); | |||
1882 | if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { | |||
1883 | rrt->rrt_t = t_lifetime; | |||
1884 | rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; | |||
1885 | } | |||
1886 | updated++; | |||
1887 | } else { | |||
1888 | log_debug("\tnon-interface route found: %s/%d on %d", | |||
1889 | inet6_n2p(&rrt->rrt_info.rip6_dest), | |||
1890 | rrt->rrt_info.rip6_plen, | |||
1891 | rrt->rrt_index); | |||
1892 | } | |||
1893 | } else | |||
1894 | log_debug("\tno interface route found"); | |||
1895 | /* age route for p2p destination */ | |||
1896 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { | |||
1897 | memset(&ni6, 0, sizeof(ni6)); | |||
1898 | ni6.rip6_dest = ifa->ifa_raddr; | |||
1899 | ni6.rip6_plen = 128; | |||
1900 | applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/ | |||
1901 | log_debug("\tfind p2p route %s/%d on %d", | |||
1902 | inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, | |||
1903 | ifcp->ifc_index); | |||
1904 | if ((rrt = rtsearch(&ni6, NULL((void*)0))) != NULL((void*)0)) { | |||
1905 | if (rrt->rrt_index == ifcp->ifc_index && | |||
1906 | IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &ifa->ifa_addr)(memcmp(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8[0 ], &(&ifa->ifa_addr)->__u6_addr.__u6_addr8[0], sizeof (struct in6_addr)) == 0)) { | |||
1907 | log_debug("\troute found, age it"); | |||
1908 | if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) { | |||
1909 | rrt->rrt_t = t_lifetime; | |||
1910 | rrt->rrt_info.rip6_metric = | |||
1911 | HOPCNT_INFINITY616; | |||
1912 | updated++; | |||
1913 | } | |||
1914 | } else { | |||
1915 | log_debug("\tnon-p2p route found: %s/%d on %d", | |||
1916 | inet6_n2p(&rrt->rrt_info.rip6_dest), | |||
1917 | rrt->rrt_info.rip6_plen, | |||
1918 | rrt->rrt_index); | |||
1919 | } | |||
1920 | } else | |||
1921 | log_debug("\tno p2p route found"); | |||
1922 | } | |||
1923 | return updated ? 0 : -1; | |||
1924 | } | |||
1925 | ||||
1926 | /* | |||
1927 | * Get each interface address and put those interface routes to the route | |||
1928 | * list. | |||
1929 | */ | |||
1930 | int | |||
1931 | ifrt(struct ifc *ifcp, int again) | |||
1932 | { | |||
1933 | struct ifac *ifa; | |||
1934 | struct riprt *rrt = NULL((void*)0), *search_rrt, *prev_rrt, *loop_rrt; | |||
1935 | struct netinfo6 *np; | |||
1936 | time_t t_lifetime; | |||
1937 | int need_trigger = 0; | |||
1938 | ||||
1939 | #if 0 | |||
1940 | if (ifcp->ifc_flags & IFF_LOOPBACK0x8) | |||
1941 | return 0; /* ignore loopback */ | |||
1942 | #endif | |||
1943 | ||||
1944 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { | |||
1945 | ifrt_p2p(ifcp, again); | |||
1946 | return 0; | |||
1947 | } | |||
1948 | ||||
1949 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { | |||
1950 | if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)(((&ifa->ifa_addr)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ifa->ifa_addr)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) { | |||
1951 | #if 0 | |||
1952 | log_debug("route: %s on %s: " | |||
1953 | "skip linklocal interface address", | |||
1954 | inet6_n2p(&ifa->ifa_addr), ifcp->ifc_name); | |||
1955 | #endif | |||
1956 | continue; | |||
1957 | } | |||
1958 | if (IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_addr)((*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& ifa->ifa_addr)->__u6_addr.__u6_addr8[12]) == 0))) { | |||
1959 | #if 0 | |||
1960 | log_debug("route: %s: skip unspec interface address", | |||
1961 | ifcp->ifc_name); | |||
1962 | #endif | |||
1963 | continue; | |||
1964 | } | |||
1965 | if (IN6_IS_ADDR_LOOPBACK(&ifa->ifa_addr)((*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr. __u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_addr)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(& ifa->ifa_addr)->__u6_addr.__u6_addr8[12]) == (__uint32_t )(__builtin_constant_p(1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t )(1) & 0xff000000) >> 24) : __swap32md(1))))) { | |||
1966 | #if 0 | |||
1967 | log_debug("route: %s: skip loopback address", | |||
1968 | ifcp->ifc_name); | |||
1969 | #endif | |||
1970 | continue; | |||
1971 | } | |||
1972 | if (ifcp->ifc_flags & IFF_UP0x1) { | |||
1973 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void*)0)) | |||
1974 | fatal("calloc: struct riprt"); | |||
1975 | rrt->rrt_index = ifcp->ifc_index; | |||
1976 | rrt->rrt_t = 0; /* don't age */ | |||
1977 | rrt->rrt_info.rip6_dest = ifa->ifa_addr; | |||
1978 | rrt->rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); | |||
1979 | rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; | |||
1980 | rrt->rrt_info.rip6_plen = ifa->ifa_plen; | |||
1981 | if (ifa->ifa_plen == 128) | |||
1982 | rrt->rrt_flags = RTF_HOST0x4; | |||
1983 | else | |||
1984 | rrt->rrt_flags = RTF_CLONING0x100; | |||
1985 | rrt->rrt_rflags |= RRTF_CHANGED0x80000000; | |||
1986 | applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen); | |||
1987 | memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); | |||
1988 | rrt->rrt_gw = ifa->ifa_addr; | |||
1989 | np = &rrt->rrt_info; | |||
1990 | search_rrt = rtsearch(np, &prev_rrt); | |||
1991 | if (search_rrt != NULL((void*)0)) { | |||
1992 | if (search_rrt->rrt_info.rip6_metric <= | |||
1993 | rrt->rrt_info.rip6_metric) { | |||
1994 | /* Already have better route */ | |||
1995 | if (!again) { | |||
1996 | log_debug("route: %s/%d: " | |||
1997 | "already registered (%s)", | |||
1998 | inet6_n2p(&np->rip6_dest), np->rip6_plen, | |||
1999 | ifcp->ifc_name); | |||
2000 | } | |||
2001 | goto next; | |||
2002 | } | |||
2003 | ||||
2004 | if (prev_rrt) | |||
2005 | prev_rrt->rrt_next = rrt->rrt_next; | |||
2006 | else | |||
2007 | riprt = rrt->rrt_next; | |||
2008 | delroute(&rrt->rrt_info, &rrt->rrt_gw); | |||
2009 | } | |||
2010 | /* Attach the route to the list */ | |||
2011 | log_debug("route: %s/%d: register route (%s)", | |||
2012 | inet6_n2p(&np->rip6_dest), np->rip6_plen, | |||
2013 | ifcp->ifc_name); | |||
2014 | rrt->rrt_next = riprt; | |||
2015 | riprt = rrt; | |||
2016 | addroute(rrt, &rrt->rrt_gw, ifcp); | |||
2017 | rrt = NULL((void*)0); | |||
2018 | sendrequest(ifcp); | |||
2019 | ripsend(ifcp, &ifcp->ifc_ripsin, 0); | |||
2020 | need_trigger = 1; | |||
2021 | } else { | |||
2022 | for (loop_rrt = riprt; loop_rrt; loop_rrt = loop_rrt->rrt_next) { | |||
2023 | if (loop_rrt->rrt_index == ifcp->ifc_index) { | |||
2024 | t_lifetime = time(NULL((void*)0)) - RIP_LIFETIME180; | |||
2025 | if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) { | |||
2026 | loop_rrt->rrt_t = t_lifetime; | |||
2027 | loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY616; | |||
2028 | loop_rrt->rrt_rflags |= RRTF_CHANGED0x80000000; | |||
2029 | need_trigger = 1; | |||
2030 | } | |||
2031 | } | |||
2032 | } | |||
2033 | } | |||
2034 | next: | |||
2035 | free(rrt); | |||
2036 | } | |||
2037 | return need_trigger; | |||
2038 | } | |||
2039 | ||||
2040 | /* | |||
2041 | * there are couple of p2p interface routing models. "behavior" lets | |||
2042 | * you pick one. it looks that gated behavior fits best with BSDs, | |||
2043 | * since BSD kernels do not look at prefix length on p2p interfaces. | |||
2044 | */ | |||
2045 | void | |||
2046 | ifrt_p2p(struct ifc *ifcp, int again) | |||
2047 | { | |||
2048 | struct ifac *ifa; | |||
2049 | struct riprt *rrt, *orrt, *prevrrt; | |||
2050 | struct netinfo6 *np; | |||
2051 | struct in6_addr addr, dest; | |||
2052 | int advert, ignore, i; | |||
2053 | #define P2PADVERT_NETWORK 1 | |||
2054 | #define P2PADVERT_ADDR 2 | |||
2055 | #define P2PADVERT_DEST 4 | |||
2056 | #define P2PADVERT_MAX 4 | |||
2057 | const enum { CISCO, GATED, ROUTE6D } behavior = GATED; | |||
2058 | const char *category = ""; | |||
2059 | const char *noadv; | |||
2060 | ||||
2061 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { | |||
2062 | addr = ifa->ifa_addr; | |||
2063 | dest = ifa->ifa_raddr; | |||
2064 | applyplen(&addr, ifa->ifa_plen); | |||
2065 | applyplen(&dest, ifa->ifa_plen); | |||
2066 | advert = ignore = 0; | |||
2067 | switch (behavior) { | |||
2068 | case CISCO: | |||
2069 | /* | |||
2070 | * honor addr/plen, just like normal shared medium | |||
2071 | * interface. this may cause trouble if you reuse | |||
2072 | * addr/plen on other interfaces. | |||
2073 | * | |||
2074 | * advertise addr/plen. | |||
2075 | */ | |||
2076 | advert |= P2PADVERT_NETWORK; | |||
2077 | break; | |||
2078 | case GATED: | |||
2079 | /* | |||
2080 | * prefixlen on p2p interface is meaningless. | |||
2081 | * advertise addr/128 and dest/128. | |||
2082 | * | |||
2083 | * do not install network route to route6d routing | |||
2084 | * table (if we do, it would prevent route installation | |||
2085 | * for other p2p interface that shares addr/plen). | |||
2086 | * | |||
2087 | * XXX what should we do if dest is ::? it will not | |||
2088 | * get announced anyways (see following filter), | |||
2089 | * but we need to think. | |||
2090 | */ | |||
2091 | advert |= P2PADVERT_ADDR; | |||
2092 | advert |= P2PADVERT_DEST; | |||
2093 | ignore |= P2PADVERT_NETWORK; | |||
2094 | break; | |||
2095 | case ROUTE6D: | |||
2096 | /* | |||
2097 | * just for testing. actually the code is redundant | |||
2098 | * given the current p2p interface address assignment | |||
2099 | * rule for kame kernel. | |||
2100 | * | |||
2101 | * intent: | |||
2102 | * A/n -> announce A/n | |||
2103 | * A B/n, A and B share prefix -> A/n (= B/n) | |||
2104 | * A B/n, do not share prefix -> A/128 and B/128 | |||
2105 | * actually, A/64 and A B/128 are the only cases | |||
2106 | * permitted by the kernel: | |||
2107 | * A/64 -> A/64 | |||
2108 | * A B/128 -> A/128 and B/128 | |||
2109 | */ | |||
2110 | if (!IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_raddr)((*(const u_int32_t *)(const void *)(&(&ifa->ifa_raddr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_raddr)->__u6_addr .__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&ifa->ifa_raddr)->__u6_addr.__u6_addr8[8] ) == 0) && (*(const u_int32_t *)(const void *)(&( &ifa->ifa_raddr)->__u6_addr.__u6_addr8[12]) == 0))) { | |||
2111 | if (IN6_ARE_ADDR_EQUAL(&addr, &dest)(memcmp(&(&addr)->__u6_addr.__u6_addr8[0], &(& dest)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr)) == 0)) | |||
2112 | advert |= P2PADVERT_NETWORK; | |||
2113 | else { | |||
2114 | advert |= P2PADVERT_ADDR; | |||
2115 | advert |= P2PADVERT_DEST; | |||
2116 | ignore |= P2PADVERT_NETWORK; | |||
2117 | } | |||
2118 | } else | |||
2119 | advert |= P2PADVERT_NETWORK; | |||
2120 | break; | |||
2121 | } | |||
2122 | ||||
2123 | for (i = 1; i <= P2PADVERT_MAX; i *= 2) { | |||
2124 | if ((ignore & i) != 0) | |||
2125 | continue; | |||
2126 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void*)0)) { | |||
2127 | fatal("calloc: struct riprt"); | |||
2128 | /*NOTREACHED*/ | |||
2129 | } | |||
2130 | rrt->rrt_index = ifcp->ifc_index; | |||
2131 | rrt->rrt_t = 0; /* don't age */ | |||
2132 | switch (i) { | |||
2133 | case P2PADVERT_NETWORK: | |||
2134 | rrt->rrt_info.rip6_dest = ifa->ifa_addr; | |||
2135 | rrt->rrt_info.rip6_plen = ifa->ifa_plen; | |||
2136 | applyplen(&rrt->rrt_info.rip6_dest, | |||
2137 | ifa->ifa_plen); | |||
2138 | category = "network"; | |||
2139 | break; | |||
2140 | case P2PADVERT_ADDR: | |||
2141 | rrt->rrt_info.rip6_dest = ifa->ifa_addr; | |||
2142 | rrt->rrt_info.rip6_plen = 128; | |||
2143 | rrt->rrt_gw = in6addr_loopback; | |||
2144 | category = "addr"; | |||
2145 | break; | |||
2146 | case P2PADVERT_DEST: | |||
2147 | rrt->rrt_info.rip6_dest = ifa->ifa_raddr; | |||
2148 | rrt->rrt_info.rip6_plen = 128; | |||
2149 | rrt->rrt_gw = ifa->ifa_addr; | |||
2150 | category = "dest"; | |||
2151 | break; | |||
2152 | } | |||
2153 | if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_info .rip6_dest)->__u6_addr.__u6_addr8[0]) == 0) && (*( const u_int32_t *)(const void *)(&(&rrt->rrt_info. rip6_dest)->__u6_addr.__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_info.rip6_dest )->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_info.rip6_dest)-> __u6_addr.__u6_addr8[12]) == 0)) || | |||
2154 | IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)(((&rrt->rrt_info.rip6_dest)->__u6_addr.__u6_addr8[ 0] == 0xfe) && (((&rrt->rrt_info.rip6_dest)-> __u6_addr.__u6_addr8[1] & 0xc0) == 0x80))) { | |||
2155 | #if 0 | |||
2156 | log_debug("route: %s: skip unspec/linklocal " | |||
2157 | "(%s on %s)", category, ifcp->ifc_name); | |||
2158 | #endif | |||
2159 | free(rrt); | |||
2160 | continue; | |||
2161 | } | |||
2162 | if ((advert & i) == 0) { | |||
2163 | rrt->rrt_rflags |= RRTF_NOADVERTISE0x10000000; | |||
2164 | noadv = ", NO-ADV"; | |||
2165 | } else | |||
2166 | noadv = ""; | |||
2167 | rrt->rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); | |||
2168 | rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric; | |||
2169 | np = &rrt->rrt_info; | |||
2170 | orrt = rtsearch(np, &prevrrt); | |||
2171 | if (!orrt) { | |||
2172 | /* Attach the route to the list */ | |||
2173 | log_debug("route: %s/%d: register route " | |||
2174 | "(%s on %s%s)", | |||
2175 | inet6_n2p(&np->rip6_dest), np->rip6_plen, | |||
2176 | category, ifcp->ifc_name, noadv); | |||
2177 | rrt->rrt_next = riprt; | |||
2178 | riprt = rrt; | |||
2179 | } else if (rrt->rrt_index != orrt->rrt_index || | |||
2180 | rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) { | |||
2181 | /* swap route */ | |||
2182 | rrt->rrt_next = orrt->rrt_next; | |||
2183 | if (prevrrt) | |||
2184 | prevrrt->rrt_next = rrt; | |||
2185 | else | |||
2186 | riprt = rrt; | |||
2187 | free(orrt); | |||
2188 | ||||
2189 | log_debug("route: %s/%d: update (%s on %s%s)", | |||
2190 | inet6_n2p(&np->rip6_dest), np->rip6_plen, | |||
2191 | category, ifcp->ifc_name, noadv); | |||
2192 | } else { | |||
2193 | /* Already found */ | |||
2194 | if (!again) { | |||
2195 | log_debug("route: %s/%d: " | |||
2196 | "already registered (%s on %s%s)", | |||
2197 | inet6_n2p(&np->rip6_dest), | |||
2198 | np->rip6_plen, category, | |||
2199 | ifcp->ifc_name, noadv); | |||
2200 | } | |||
2201 | free(rrt); | |||
2202 | } | |||
2203 | } | |||
2204 | } | |||
2205 | #undef P2PADVERT_NETWORK | |||
2206 | #undef P2PADVERT_ADDR | |||
2207 | #undef P2PADVERT_DEST | |||
2208 | #undef P2PADVERT_MAX | |||
2209 | } | |||
2210 | ||||
2211 | int | |||
2212 | getifmtu(int ifindex) | |||
2213 | { | |||
2214 | int mib[6]; | |||
2215 | char *buf = NULL((void*)0); | |||
2216 | size_t needed; | |||
2217 | struct if_msghdr *ifm; | |||
2218 | int mtu; | |||
2219 | ||||
2220 | mib[0] = CTL_NET4; | |||
2221 | mib[1] = PF_ROUTE17; | |||
2222 | mib[2] = 0; | |||
2223 | mib[3] = AF_INET624; | |||
2224 | mib[4] = NET_RT_IFLIST3; | |||
2225 | mib[5] = ifindex; | |||
2226 | while (1) { | |||
2227 | if (sysctl(mib, 6, NULL((void*)0), &needed, NULL((void*)0), 0) == -1) | |||
2228 | fatal("sysctl estimate NET_RT_IFLIST"); | |||
2229 | if (needed == 0) | |||
2230 | break; | |||
2231 | if ((buf = realloc(buf, needed)) == NULL((void*)0)) | |||
2232 | fatal(NULL((void*)0)); | |||
2233 | if (sysctl(mib, 6, buf, &needed, NULL((void*)0), 0) == -1) { | |||
2234 | if (errno(*__errno()) == ENOMEM12) | |||
2235 | continue; | |||
2236 | fatal("sysctl NET_RT_IFLIST"); | |||
2237 | } | |||
2238 | break; | |||
2239 | } | |||
2240 | ifm = (struct if_msghdr *)buf; | |||
2241 | mtu = ifm->ifm_data.ifi_mtu; | |||
2242 | free(buf); | |||
2243 | return mtu; | |||
2244 | } | |||
2245 | ||||
2246 | const char * | |||
2247 | rttypes(struct rt_msghdr *rtm) | |||
2248 | { | |||
2249 | #define RTTYPE(s, f) \ | |||
2250 | do { \ | |||
2251 | if (rtm->rtm_type == (f)) \ | |||
2252 | return (s); \ | |||
2253 | } while (0) | |||
2254 | RTTYPE("ADD", RTM_ADD0x1); | |||
2255 | RTTYPE("DELETE", RTM_DELETE0x2); | |||
2256 | RTTYPE("CHANGE", RTM_CHANGE0x3); | |||
2257 | RTTYPE("GET", RTM_GET0x4); | |||
2258 | RTTYPE("REDIRECT", RTM_REDIRECT0x6); | |||
2259 | RTTYPE("MISS", RTM_MISS0x7); | |||
2260 | RTTYPE("RESOLVE", RTM_RESOLVE0xb); | |||
2261 | RTTYPE("NEWADDR", RTM_NEWADDR0xc); | |||
2262 | RTTYPE("DELADDR", RTM_DELADDR0xd); | |||
2263 | RTTYPE("IFINFO", RTM_IFINFO0xe); | |||
2264 | #ifdef RTM_OIFINFO | |||
2265 | RTTYPE("OIFINFO", RTM_OIFINFO); | |||
2266 | #endif | |||
2267 | #ifdef RTM_IFANNOUNCE0xf | |||
2268 | RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE0xf); | |||
2269 | #endif | |||
2270 | #ifdef RTM_NEWMADDR | |||
2271 | RTTYPE("NEWMADDR", RTM_NEWMADDR); | |||
2272 | #endif | |||
2273 | #ifdef RTM_DELMADDR | |||
2274 | RTTYPE("DELMADDR", RTM_DELMADDR); | |||
2275 | #endif | |||
2276 | #undef RTTYPE | |||
2277 | return NULL((void*)0); | |||
2278 | } | |||
2279 | ||||
2280 | const char * | |||
2281 | rtflags(struct rt_msghdr *rtm) | |||
2282 | { | |||
2283 | static char buf[BUFSIZ1024]; | |||
2284 | ||||
2285 | /* | |||
2286 | * letter conflict should be okay. painful when *BSD diverges... | |||
2287 | */ | |||
2288 | strlcpy(buf, "", sizeof(buf)); | |||
2289 | #define RTFLAG(s, f) \ | |||
2290 | do { \ | |||
2291 | if (rtm->rtm_flags & (f)) \ | |||
2292 | strlcat(buf, (s), sizeof(buf)); \ | |||
2293 | } while (0) | |||
2294 | RTFLAG("U", RTF_UP0x1); | |||
2295 | RTFLAG("G", RTF_GATEWAY0x2); | |||
2296 | RTFLAG("H", RTF_HOST0x4); | |||
2297 | RTFLAG("R", RTF_REJECT0x8); | |||
2298 | RTFLAG("D", RTF_DYNAMIC0x10); | |||
2299 | RTFLAG("M", RTF_MODIFIED0x20); | |||
2300 | RTFLAG("d", RTF_DONE0x40); | |||
2301 | RTFLAG("m", RTF_MULTICAST0x200); | |||
2302 | RTFLAG("C", RTF_CLONING0x100); | |||
2303 | RTFLAG("c", RTF_CLONED0x10000); | |||
2304 | RTFLAG("L", RTF_LLINFO0x400); | |||
2305 | RTFLAG("S", RTF_STATIC0x800); | |||
2306 | RTFLAG("B", RTF_BLACKHOLE0x1000); | |||
2307 | RTFLAG("3", RTF_PROTO30x2000); | |||
2308 | RTFLAG("2", RTF_PROTO20x4000); | |||
2309 | RTFLAG("1", RTF_PROTO10x8000); | |||
2310 | RTFLAG("b", RTF_BROADCAST0x400000); | |||
2311 | #undef RTFLAG | |||
2312 | return buf; | |||
2313 | } | |||
2314 | ||||
2315 | const char * | |||
2316 | ifflags(int flags) | |||
2317 | { | |||
2318 | static char buf[BUFSIZ1024]; | |||
2319 | ||||
2320 | strlcpy(buf, "", sizeof(buf)); | |||
2321 | #define IFFLAG(s, f) \ | |||
2322 | do { \ | |||
2323 | if (flags & (f)) { \ | |||
2324 | if (buf[0]) \ | |||
2325 | strlcat(buf, ",", sizeof(buf)); \ | |||
2326 | strlcat(buf, (s), sizeof(buf)); \ | |||
2327 | } \ | |||
2328 | } while (0) | |||
2329 | IFFLAG("UP", IFF_UP0x1); | |||
2330 | IFFLAG("BROADCAST", IFF_BROADCAST0x2); | |||
2331 | IFFLAG("DEBUG", IFF_DEBUG0x4); | |||
2332 | IFFLAG("LOOPBACK", IFF_LOOPBACK0x8); | |||
2333 | IFFLAG("POINTOPOINT", IFF_POINTOPOINT0x10); | |||
2334 | IFFLAG("STATICARP", IFF_STATICARP0x20); | |||
2335 | IFFLAG("RUNNING", IFF_RUNNING0x40); | |||
2336 | IFFLAG("NOARP", IFF_NOARP0x80); | |||
2337 | IFFLAG("PROMISC", IFF_PROMISC0x100); | |||
2338 | IFFLAG("ALLMULTI", IFF_ALLMULTI0x200); | |||
2339 | IFFLAG("OACTIVE", IFF_OACTIVE0x400); | |||
2340 | IFFLAG("SIMPLEX", IFF_SIMPLEX0x800); | |||
2341 | IFFLAG("LINK0", IFF_LINK00x1000); | |||
2342 | IFFLAG("LINK1", IFF_LINK10x2000); | |||
2343 | IFFLAG("LINK2", IFF_LINK20x4000); | |||
2344 | IFFLAG("MULTICAST", IFF_MULTICAST0x8000); | |||
2345 | #undef IFFLAG | |||
2346 | return buf; | |||
2347 | } | |||
2348 | ||||
2349 | void | |||
2350 | krtread(int again) | |||
2351 | { | |||
2352 | int mib[6]; | |||
2353 | size_t msize; | |||
2354 | char *buf, *p, *lim; | |||
2355 | struct rt_msghdr *rtm; | |||
2356 | int retry; | |||
2357 | const char *errmsg; | |||
2358 | ||||
2359 | retry = 0; | |||
2360 | buf = NULL((void*)0); | |||
2361 | mib[0] = CTL_NET4; | |||
2362 | mib[1] = PF_ROUTE17; | |||
2363 | mib[2] = 0; | |||
2364 | mib[3] = AF_INET624; /* Address family */ | |||
2365 | mib[4] = NET_RT_DUMP1; /* Dump the kernel routing table */ | |||
2366 | mib[5] = 0; /* No flags */ | |||
2367 | do { | |||
2368 | retry++; | |||
2369 | free(buf); | |||
2370 | buf = NULL((void*)0); | |||
2371 | errmsg = NULL((void*)0); | |||
2372 | if (sysctl(mib, 6, NULL((void*)0), &msize, NULL((void*)0), 0) == -1) { | |||
2373 | errmsg = "sysctl estimate"; | |||
2374 | continue; | |||
2375 | } | |||
2376 | if ((buf = malloc(msize)) == NULL((void*)0)) { | |||
2377 | errmsg = "malloc"; | |||
2378 | continue; | |||
2379 | } | |||
2380 | if (sysctl(mib, 6, buf, &msize, NULL((void*)0), 0) == -1) { | |||
2381 | errmsg = "sysctl NET_RT_DUMP"; | |||
2382 | continue; | |||
2383 | } | |||
2384 | } while (retry < 5 && errmsg != NULL((void*)0)); | |||
2385 | if (errmsg) { | |||
2386 | fatal(errmsg); | |||
2387 | /*NOTREACHED*/ | |||
2388 | } else if (1 < retry) | |||
2389 | log_info("NET_RT_DUMP %d retries", retry); | |||
2390 | ||||
2391 | lim = buf + msize; | |||
2392 | for (p = buf; p < lim; p += rtm->rtm_msglen) { | |||
2393 | rtm = (struct rt_msghdr *)p; | |||
2394 | if (rtm->rtm_version != RTM_VERSION5) | |||
2395 | continue; | |||
2396 | rt_entry(rtm, again); | |||
2397 | } | |||
2398 | free(buf); | |||
2399 | } | |||
2400 | ||||
2401 | void | |||
2402 | rt_entry(struct rt_msghdr *rtm, int again) | |||
2403 | { | |||
2404 | struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask; | |||
2405 | struct sockaddr_in6 *sin6_ifp; | |||
2406 | char *rtmp, *ifname = NULL((void*)0); | |||
2407 | struct riprt *rrt, *orrt; | |||
2408 | struct netinfo6 *np; | |||
2409 | int s; | |||
2410 | ||||
2411 | sin6_dst = sin6_gw = sin6_mask = sin6_ifp = 0; | |||
2412 | if ((rtm->rtm_flags & RTF_UP0x1) == 0 || rtm->rtm_flags & | |||
2413 | (RTF_CLONING0x100|RTF_LLINFO0x400|RTF_BLACKHOLE0x1000)) { | |||
2414 | return; /* not interested in the link route */ | |||
2415 | } | |||
2416 | /* do not look at cloned routes */ | |||
2417 | #ifdef RTF_WASCLONED | |||
2418 | if (rtm->rtm_flags & RTF_WASCLONED) | |||
2419 | return; | |||
2420 | #endif | |||
2421 | #ifdef RTF_CLONED0x10000 | |||
2422 | if (rtm->rtm_flags & RTF_CLONED0x10000) | |||
2423 | return; | |||
2424 | #endif | |||
2425 | /* | |||
2426 | * do not look at dynamic routes. | |||
2427 | * netbsd/openbsd cloned routes have UGHD. | |||
2428 | */ | |||
2429 | if (rtm->rtm_flags & RTF_DYNAMIC0x10) | |||
2430 | return; | |||
2431 | rtmp = (char *)((char *)rtm + rtm->rtm_hdrlen); | |||
2432 | /* Destination */ | |||
2433 | if ((rtm->rtm_addrs & RTA_DST0x1) == 0) | |||
2434 | return; /* ignore routes without destination address */ | |||
2435 | sin6_dst = (struct sockaddr_in6 *)rtmp; | |||
2436 | rtmp += ROUNDUP(sin6_dst->sin6_len)((sin6_dst->sin6_len) > 0 ? (1 + (((sin6_dst->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); | |||
2437 | if (rtm->rtm_addrs & RTA_GATEWAY0x2) { | |||
2438 | sin6_gw = (struct sockaddr_in6 *)rtmp; | |||
2439 | rtmp += ROUNDUP(sin6_gw->sin6_len)((sin6_gw->sin6_len) > 0 ? (1 + (((sin6_gw->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); | |||
2440 | } | |||
2441 | if (rtm->rtm_addrs & RTA_NETMASK0x4) { | |||
2442 | sin6_mask = (struct sockaddr_in6 *)rtmp; | |||
2443 | rtmp += ROUNDUP(sin6_mask->sin6_len)((sin6_mask->sin6_len) > 0 ? (1 + (((sin6_mask->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); | |||
2444 | } | |||
2445 | if (rtm->rtm_addrs & RTA_IFP0x10) { | |||
2446 | sin6_ifp = (struct sockaddr_in6 *)rtmp; | |||
2447 | rtmp += ROUNDUP(sin6_ifp->sin6_len)((sin6_ifp->sin6_len) > 0 ? (1 + (((sin6_ifp->sin6_len ) - 1) | (sizeof(long) - 1))) : sizeof(long)); | |||
2448 | } | |||
2449 | ||||
2450 | /* Destination */ | |||
2451 | if (sin6_dst->sin6_family != AF_INET624) | |||
2452 | return; | |||
2453 | if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr)(((&sin6_dst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&sin6_dst->sin6_addr)->__u6_addr .__u6_addr8[1] & 0xc0) == 0x80))) | |||
2454 | return; /* Link-local */ | |||
2455 | if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback)(memcmp(&(&sin6_dst->sin6_addr)->__u6_addr.__u6_addr8 [0], &(&in6addr_loopback)->__u6_addr.__u6_addr8[0] , sizeof(struct in6_addr)) == 0)) | |||
2456 | return; /* Loopback */ | |||
2457 | if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr)((&sin6_dst->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff)) | |||
2458 | return; | |||
2459 | ||||
2460 | if ((rrt = calloc(1, sizeof(struct riprt))) == NULL((void*)0)) { | |||
2461 | fatal("calloc: struct riprt"); | |||
2462 | /*NOTREACHED*/ | |||
2463 | } | |||
2464 | np = &rrt->rrt_info; | |||
2465 | rrt->rrt_t = time(NULL((void*)0)); | |||
2466 | if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC0x800)) | |||
2467 | rrt->rrt_t = 0; /* Don't age static routes */ | |||
2468 | if ((rtm->rtm_flags & (RTF_HOST0x4|RTF_GATEWAY0x2)) == RTF_HOST0x4) | |||
2469 | rrt->rrt_t = 0; /* Don't age non-gateway host routes */ | |||
2470 | np->rip6_tag = 0; | |||
2471 | np->rip6_metric = 1; | |||
2472 | rrt->rrt_flags = rtm->rtm_flags; | |||
2473 | np->rip6_dest = sin6_dst->sin6_addr; | |||
2474 | ||||
2475 | /* Mask or plen */ | |||
2476 | if (rtm->rtm_flags & RTF_HOST0x4) | |||
2477 | np->rip6_plen = 128; /* Host route */ | |||
2478 | else if (sin6_mask) | |||
2479 | np->rip6_plen = sin6mask2len(sin6_mask); | |||
2480 | else | |||
2481 | np->rip6_plen = 0; | |||
2482 | ||||
2483 | orrt = rtsearch(np, NULL((void*)0)); | |||
2484 | if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY616) { | |||
2485 | /* Already found */ | |||
2486 | if (!again) { | |||
2487 | log_debug("route: %s/%d flags %s: already registered", | |||
2488 | inet6_n2p(&np->rip6_dest), np->rip6_plen, | |||
2489 | rtflags(rtm)); | |||
2490 | } | |||
2491 | free(rrt); | |||
2492 | return; | |||
2493 | } | |||
2494 | /* Gateway */ | |||
2495 | if (!sin6_gw) | |||
2496 | memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); | |||
2497 | else { | |||
2498 | if (sin6_gw->sin6_family == AF_INET624) | |||
2499 | rrt->rrt_gw = sin6_gw->sin6_addr; | |||
2500 | else if (sin6_gw->sin6_family == AF_LINK18) { | |||
2501 | /* XXX in case ppp link? */ | |||
2502 | rrt->rrt_gw = in6addr_loopback; | |||
2503 | } else | |||
2504 | memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr)); | |||
2505 | } | |||
2506 | log_enqueue("route: %s/%d flags %s", | |||
2507 | inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm)); | |||
2508 | log_enqueue(" gw %s", inet6_n2p(&rrt->rrt_gw)); | |||
2509 | ||||
2510 | /* Interface */ | |||
2511 | s = rtm->rtm_index; | |||
2512 | if (s < nindex2ifc && index2ifc[s]) | |||
2513 | ifname = index2ifc[s]->ifc_name; | |||
2514 | else { | |||
2515 | log_debug(" not configured"); | |||
2516 | free(rrt); | |||
2517 | return; | |||
2518 | } | |||
2519 | log_debug(" if %s sock %d", ifname, s); | |||
2520 | rrt->rrt_index = s; | |||
2521 | ||||
2522 | /* Check gateway */ | |||
2523 | if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw)(((&rrt->rrt_gw)->__u6_addr.__u6_addr8[0] == 0xfe) && (((&rrt->rrt_gw)->__u6_addr.__u6_addr8[1] & 0xc0 ) == 0x80)) && | |||
2524 | !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)((*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&rrt->rrt_gw)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&rrt->rrt_gw )->__u6_addr.__u6_addr8[12]) == (__uint32_t)(__builtin_constant_p (1) ? (__uint32_t)(((__uint32_t)(1) & 0xff) << 24 | ((__uint32_t)(1) & 0xff00) << 8 | ((__uint32_t)(1) & 0xff0000) >> 8 | ((__uint32_t)(1) & 0xff000000 ) >> 24) : __swap32md(1))))) { | |||
2525 | log_warnx("***** Gateway %s is not a link-local address.", | |||
2526 | inet6_n2p(&rrt->rrt_gw)); | |||
2527 | log_warnx("***** dest(%s) if(%s) -- Not optimized.", | |||
2528 | inet6_n2p(&rrt->rrt_info.rip6_dest), ifname); | |||
2529 | rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR0x20000000; | |||
2530 | } | |||
2531 | ||||
2532 | /* Put it to the route list */ | |||
2533 | if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY616) { | |||
2534 | /* replace route list */ | |||
2535 | rrt->rrt_next = orrt->rrt_next; | |||
2536 | *orrt = *rrt; | |||
2537 | log_debug("route: %s/%d flags %s: replace new route", | |||
2538 | inet6_n2p(&np->rip6_dest), np->rip6_plen, | |||
2539 | rtflags(rtm)); | |||
2540 | free(rrt); | |||
2541 | } else { | |||
2542 | rrt->rrt_next = riprt; | |||
2543 | riprt = rrt; | |||
2544 | } | |||
2545 | } | |||
2546 | ||||
2547 | int | |||
2548 | addroute(struct riprt *rrt, const struct in6_addr *gw, struct ifc *ifcp) | |||
2549 | { | |||
2550 | struct netinfo6 *np; | |||
2551 | u_char buf[BUFSIZ1024], buf1[BUFSIZ1024], buf2[BUFSIZ1024]; | |||
2552 | struct rt_msghdr *rtm; | |||
2553 | struct sockaddr_in6 *sin6; | |||
2554 | int len; | |||
2555 | ||||
2556 | np = &rrt->rrt_info; | |||
2557 | inet_ntop(AF_INET624, (const void *)gw, (char *)buf1, sizeof(buf1)); | |||
2558 | inet_ntop(AF_INET624, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2)); | |||
2559 | if (uflag) | |||
2560 | log_info("RTADD: %s/%d gw %s [%d] ifa %s", | |||
2561 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, | |||
2562 | np->rip6_metric - 1, buf2); | |||
2563 | else | |||
2564 | log_debug("RTADD: %s/%d gw %s [%d] ifa %s", | |||
2565 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1, | |||
2566 | np->rip6_metric - 1, buf2); | |||
2567 | ||||
2568 | if (nflag) | |||
2569 | return 0; | |||
2570 | ||||
2571 | memset(buf, 0, sizeof(buf)); | |||
2572 | rtm = (struct rt_msghdr *)buf; | |||
2573 | rtm->rtm_type = RTM_ADD0x1; | |||
2574 | rtm->rtm_version = RTM_VERSION5; | |||
2575 | rtm->rtm_seq = ++seq; | |||
2576 | rtm->rtm_flags = rrt->rrt_flags; | |||
2577 | rtm->rtm_addrs = RTA_DST0x1 | RTA_GATEWAY0x2 | RTA_NETMASK0x4; | |||
2578 | rtm->rtm_inits = RTV_HOPCOUNT0x2; | |||
2579 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; | |||
2580 | /* Destination */ | |||
2581 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2582 | sin6->sin6_family = AF_INET624; | |||
2583 | sin6->sin6_addr = np->rip6_dest; | |||
2584 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2585 | /* Gateway */ | |||
2586 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2587 | sin6->sin6_family = AF_INET624; | |||
2588 | sin6->sin6_addr = *gw; | |||
2589 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2590 | /* Netmask */ | |||
2591 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2592 | sin6->sin6_family = AF_INET624; | |||
2593 | sin6->sin6_addr = *(plen2mask(np->rip6_plen)); | |||
2594 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2595 | ||||
2596 | len = (char *)sin6 - (char *)buf; | |||
2597 | rtm->rtm_msglen = len; | |||
2598 | if (write(rtsock, buf, len) > 0) | |||
2599 | return 0; | |||
2600 | ||||
2601 | if (errno(*__errno()) == EEXIST17) { | |||
2602 | log_warnx("RTADD: Route already exists %s/%d gw %s", | |||
2603 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1); | |||
2604 | } else { | |||
2605 | log_warnx("RTADD: Can not write to rtsock (addroute): %s", | |||
2606 | strerror(errno(*__errno()))); | |||
2607 | } | |||
2608 | return -1; | |||
2609 | } | |||
2610 | ||||
2611 | int | |||
2612 | delroute(struct netinfo6 *np, struct in6_addr *gw) | |||
2613 | { | |||
2614 | u_char buf[BUFSIZ1024], buf2[BUFSIZ1024]; | |||
2615 | struct rt_msghdr *rtm; | |||
2616 | struct sockaddr_in6 *sin6; | |||
2617 | int len; | |||
2618 | ||||
2619 | inet_ntop(AF_INET624, (void *)gw, (char *)buf2, sizeof(buf2)); | |||
2620 | if (uflag) | |||
2621 | log_info("RTDEL: %s/%d gw %s", inet6_n2p(&np->rip6_dest), | |||
2622 | np->rip6_plen, buf2); | |||
2623 | else | |||
2624 | log_debug("RTDEL: %s/%d gw %s", inet6_n2p(&np->rip6_dest), | |||
2625 | np->rip6_plen, buf2); | |||
2626 | ||||
2627 | if (nflag) | |||
2628 | return 0; | |||
2629 | ||||
2630 | memset(buf, 0, sizeof(buf)); | |||
2631 | rtm = (struct rt_msghdr *)buf; | |||
2632 | rtm->rtm_type = RTM_DELETE0x2; | |||
2633 | rtm->rtm_version = RTM_VERSION5; | |||
2634 | rtm->rtm_seq = ++seq; | |||
2635 | rtm->rtm_flags = RTF_UP0x1 | RTF_GATEWAY0x2; | |||
2636 | if (np->rip6_plen == sizeof(struct in6_addr) * 8) | |||
2637 | rtm->rtm_flags |= RTF_HOST0x4; | |||
2638 | rtm->rtm_addrs = RTA_DST0x1 | RTA_GATEWAY0x2 | RTA_NETMASK0x4; | |||
2639 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; | |||
2640 | /* Destination */ | |||
2641 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2642 | sin6->sin6_family = AF_INET624; | |||
2643 | sin6->sin6_addr = np->rip6_dest; | |||
2644 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2645 | /* Gateway */ | |||
2646 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2647 | sin6->sin6_family = AF_INET624; | |||
2648 | sin6->sin6_addr = *gw; | |||
2649 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2650 | /* Netmask */ | |||
2651 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2652 | sin6->sin6_family = AF_INET624; | |||
2653 | sin6->sin6_addr = *(plen2mask(np->rip6_plen)); | |||
2654 | sin6 = (struct sockaddr_in6 *)((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2655 | ||||
2656 | len = (char *)sin6 - (char *)buf; | |||
2657 | rtm->rtm_msglen = len; | |||
2658 | if (write(rtsock, buf, len) >= 0) | |||
2659 | return 0; | |||
2660 | ||||
2661 | if (errno(*__errno()) == ESRCH3) { | |||
2662 | log_warnx("RTDEL: Route does not exist: %s/%d gw %s", | |||
2663 | inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2); | |||
2664 | } else { | |||
2665 | log_warnx("RTDEL: Can not write to rtsock (delroute): %s", | |||
2666 | strerror(errno(*__errno()))); | |||
2667 | } | |||
2668 | return -1; | |||
2669 | } | |||
2670 | ||||
2671 | struct in6_addr * | |||
2672 | getroute(struct netinfo6 *np, struct in6_addr *gw) | |||
2673 | { | |||
2674 | u_char buf[BUFSIZ1024]; | |||
2675 | int len; | |||
2676 | struct rt_msghdr *rtm; | |||
2677 | struct sockaddr_in6 *sin6; | |||
2678 | ||||
2679 | rtm = (struct rt_msghdr *)buf; | |||
2680 | len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6); | |||
2681 | memset(rtm, 0, len); | |||
2682 | rtm->rtm_type = RTM_GET0x4; | |||
2683 | rtm->rtm_version = RTM_VERSION5; | |||
2684 | rtm->rtm_seq = ++seq; | |||
2685 | rtm->rtm_addrs = RTA_DST0x1; | |||
2686 | rtm->rtm_msglen = len; | |||
2687 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; | |||
2688 | sin6->sin6_len = sizeof(struct sockaddr_in6); | |||
2689 | sin6->sin6_family = AF_INET624; | |||
2690 | sin6->sin6_addr = np->rip6_dest; | |||
2691 | if (write(rtsock, buf, len) == -1) { | |||
2692 | if (errno(*__errno()) == ESRCH3) /* No such route found */ | |||
2693 | return NULL((void*)0); | |||
2694 | perror("write to rtsock"); | |||
2695 | exit(1); | |||
2696 | } | |||
2697 | do { | |||
2698 | if ((len = read(rtsock, buf, sizeof(buf))) == -1) { | |||
2699 | perror("read from rtsock"); | |||
2700 | exit(1); | |||
2701 | } | |||
2702 | rtm = (struct rt_msghdr *)buf; | |||
2703 | } while (rtm->rtm_version != RTM_VERSION5 || | |||
2704 | rtm->rtm_seq != seq || rtm->rtm_pid != pid); | |||
2705 | sin6 = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)]; | |||
2706 | if (rtm->rtm_addrs & RTA_DST0x1) { | |||
2707 | sin6 = (struct sockaddr_in6 *) | |||
2708 | ((char *)sin6 + ROUNDUP(sin6->sin6_len)((sin6->sin6_len) > 0 ? (1 + (((sin6->sin6_len) - 1) | (sizeof(long) - 1))) : sizeof(long))); | |||
2709 | } | |||
2710 | if (rtm->rtm_addrs & RTA_GATEWAY0x2) { | |||
2711 | *gw = sin6->sin6_addr; | |||
2712 | return gw; | |||
2713 | } | |||
2714 | return NULL((void*)0); | |||
2715 | } | |||
2716 | ||||
2717 | const char * | |||
2718 | inet6_n2p(const struct in6_addr *p) | |||
2719 | { | |||
2720 | static char buf[BUFSIZ1024]; | |||
2721 | ||||
2722 | return inet_ntop(AF_INET624, (const void *)p, buf, sizeof(buf)); | |||
2723 | } | |||
2724 | ||||
2725 | void | |||
2726 | ifrtdump(int sig) | |||
2727 | { | |||
2728 | ||||
2729 | ifdump(sig); | |||
2730 | rtdump(sig); | |||
2731 | } | |||
2732 | ||||
2733 | void | |||
2734 | ifdump(int sig) | |||
2735 | { | |||
2736 | struct ifc *ifcp; | |||
2737 | int i; | |||
2738 | ||||
2739 | log_info("%s: Interface Table Dump", hms()); | |||
2740 | log_info(" Number of interfaces: %d", nifc); | |||
2741 | for (i = 0; i < 2; i++) { | |||
2742 | log_info(" %sadvertising interfaces:", i ? "non-" : ""); | |||
2743 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { | |||
2744 | if (i == 0) { | |||
2745 | if ((ifcp->ifc_flags & IFF_UP0x1) == 0) | |||
2746 | continue; | |||
2747 | if (iff_find(ifcp, 'N') != NULL((void*)0)) | |||
2748 | continue; | |||
2749 | } else { | |||
2750 | if (ifcp->ifc_flags & IFF_UP0x1) | |||
2751 | continue; | |||
2752 | } | |||
2753 | ifdump0(ifcp); | |||
2754 | } | |||
2755 | } | |||
2756 | log_info(""); | |||
2757 | } | |||
2758 | ||||
2759 | void | |||
2760 | ifdump0(const struct ifc *ifcp) | |||
2761 | { | |||
2762 | struct ifac *ifa; | |||
2763 | struct iff *iffp; | |||
2764 | char buf[BUFSIZ1024]; | |||
2765 | const char *ft; | |||
2766 | int addr; | |||
2767 | ||||
2768 | log_info(" %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)", | |||
2769 | ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags), | |||
2770 | inet6_n2p(&ifcp->ifc_mylladdr), | |||
2771 | ifcp->ifc_mtu, ifcp->ifc_metric); | |||
2772 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { | |||
2773 | if (ifcp->ifc_flags & IFF_POINTOPOINT0x10) { | |||
2774 | inet_ntop(AF_INET624, (void *)&ifa->ifa_raddr, | |||
2775 | buf, sizeof(buf)); | |||
2776 | log_info("\t%s/%d -- %s", | |||
2777 | inet6_n2p(&ifa->ifa_addr), | |||
2778 | ifa->ifa_plen, buf); | |||
2779 | } else { | |||
2780 | log_info("\t%s/%d", | |||
2781 | inet6_n2p(&ifa->ifa_addr), | |||
2782 | ifa->ifa_plen); | |||
2783 | } | |||
2784 | } | |||
2785 | if (ifcp->ifc_filter) { | |||
2786 | log_enqueue("\tFilter:"); | |||
2787 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { | |||
2788 | addr = 0; | |||
2789 | switch (iffp->iff_type) { | |||
2790 | case 'A': | |||
2791 | ft = "Aggregate"; addr++; break; | |||
2792 | case 'N': | |||
2793 | ft = "No-use"; break; | |||
2794 | case 'O': | |||
2795 | ft = "Advertise-only"; addr++; break; | |||
2796 | case 'T': | |||
2797 | ft = "Default-only"; break; | |||
2798 | case 'L': | |||
2799 | ft = "Listen-only"; addr++; break; | |||
2800 | default: | |||
2801 | snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type); | |||
2802 | ft = buf; | |||
2803 | addr++; | |||
2804 | break; | |||
2805 | } | |||
2806 | log_enqueue(" %s", ft); | |||
2807 | if (addr) { | |||
2808 | log_enqueue("(%s/%d)", | |||
2809 | inet6_n2p(&iffp->iff_addr), iffp->iff_plen); | |||
2810 | } | |||
2811 | } | |||
2812 | log_info(""); | |||
2813 | } | |||
2814 | } | |||
2815 | ||||
2816 | void | |||
2817 | rtdump(int sig) | |||
2818 | { | |||
2819 | struct riprt *rrt; | |||
2820 | char buf[BUFSIZ1024]; | |||
2821 | time_t t, age; | |||
2822 | ||||
2823 | t = time(NULL((void*)0)); | |||
2824 | log_info("%s: Routing Table Dump", hms()); | |||
2825 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { | |||
2826 | if (rrt->rrt_t == 0) | |||
2827 | age = 0; | |||
2828 | else | |||
2829 | age = t - rrt->rrt_t; | |||
2830 | inet_ntop(AF_INET624, (void *)&rrt->rrt_info.rip6_dest, | |||
2831 | buf, sizeof(buf)); | |||
2832 | log_enqueue(" %s/%d if(%d:%s) gw(%s) [%d] age(%lld)", | |||
2833 | buf, rrt->rrt_info.rip6_plen, rrt->rrt_index, | |||
2834 | index2ifc[rrt->rrt_index]->ifc_name, | |||
2835 | inet6_n2p(&rrt->rrt_gw), | |||
2836 | rrt->rrt_info.rip6_metric, (long long)age); | |||
2837 | if (rrt->rrt_info.rip6_tag) { | |||
2838 | log_enqueue(" tag(0x%04x)", | |||
2839 | ntohs(rrt->rrt_info.rip6_tag)(__uint16_t)(__builtin_constant_p(rrt->rrt_info.rip6_tag) ? (__uint16_t)(((__uint16_t)(rrt->rrt_info.rip6_tag) & 0xffU ) << 8 | ((__uint16_t)(rrt->rrt_info.rip6_tag) & 0xff00U) >> 8) : __swap16md(rrt->rrt_info.rip6_tag) ) & 0xffff); | |||
2840 | } | |||
2841 | if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR0x20000000) | |||
2842 | log_enqueue(" NOT-LL"); | |||
2843 | if (rrt->rrt_rflags & RRTF_NOADVERTISE0x10000000) | |||
2844 | log_enqueue(" NO-ADV"); | |||
2845 | log_info(""); | |||
2846 | } | |||
2847 | } | |||
2848 | ||||
2849 | /* | |||
2850 | * Parse the -A (and -O) options and put corresponding filter object to the | |||
2851 | * specified interface structures. Each of the -A/O option has the following | |||
2852 | * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate) | |||
2853 | * -O 5f09:c400::/32,ef0,ef1 (only when match) | |||
2854 | */ | |||
2855 | void | |||
2856 | filterconfig(void) | |||
2857 | { | |||
2858 | int i; | |||
2859 | char *p, *ap, *iflp, *ifname, *ep; | |||
2860 | struct iff ftmp, *iff_obj; | |||
2861 | struct ifc *ifcp; | |||
2862 | struct riprt *rrt; | |||
2863 | #if 0 | |||
2864 | struct in6_addr gw; | |||
2865 | #endif | |||
2866 | u_long plen; | |||
2867 | ||||
2868 | for (i = 0; i < nfilter; i++) { | |||
2869 | ap = filter[i]; | |||
2870 | iflp = NULL((void*)0); | |||
2871 | ifcp = NULL((void*)0); | |||
2872 | if (filtertype[i] == 'N' || filtertype[i] == 'T') { | |||
2873 | iflp = ap; | |||
2874 | goto ifonly; | |||
2875 | } | |||
2876 | if ((p = strchr(ap, ',')) != NULL((void*)0)) { | |||
2877 | *p++ = '\0'; | |||
2878 | iflp = p; | |||
2879 | } | |||
2880 | if ((p = strchr(ap, '/')) == NULL((void*)0)) { | |||
2881 | log_warnx("no prefixlen specified for '%s'", ap); | |||
2882 | fatalx("exiting"); | |||
2883 | /*NOTREACHED*/ | |||
2884 | } | |||
2885 | *p++ = '\0'; | |||
2886 | if (inet_pton(AF_INET624, ap, &ftmp.iff_addr) != 1) { | |||
2887 | log_warnx("invalid prefix specified for '%s'", ap); | |||
2888 | fatalx("exiting"); | |||
2889 | /*NOTREACHED*/ | |||
2890 | } | |||
2891 | errno(*__errno()) = 0; | |||
2892 | ep = NULL((void*)0); | |||
2893 | plen = strtoul(p, &ep, 10); | |||
2894 | if (errno(*__errno()) || !*p || *ep || plen > sizeof(ftmp.iff_addr) * 8) { | |||
2895 | log_warnx("invalid prefix length specified for '%s'", ap); | |||
2896 | fatalx("exiting"); | |||
2897 | /*NOTREACHED*/ | |||
2898 | } | |||
2899 | ftmp.iff_plen = plen; | |||
2900 | ftmp.iff_next = NULL((void*)0); | |||
2901 | applyplen(&ftmp.iff_addr, ftmp.iff_plen); | |||
2902 | ifonly: | |||
2903 | ftmp.iff_type = filtertype[i]; | |||
2904 | if (iflp == NULL((void*)0) || *iflp == '\0') { | |||
2905 | log_warnx("no interface specified for '%s'", ap); | |||
2906 | fatal("exiting"); | |||
2907 | /*NOTREACHED*/ | |||
2908 | } | |||
2909 | /* parse the interface listing portion */ | |||
2910 | while (iflp) { | |||
2911 | ifname = iflp; | |||
2912 | if ((iflp = strchr(iflp, ',')) != NULL((void*)0)) | |||
2913 | *iflp++ = '\0'; | |||
2914 | ifcp = ifc_find(ifname); | |||
2915 | if (ifcp == NULL((void*)0)) { | |||
2916 | log_warnx("no interface %s exists", ifname); | |||
2917 | fatalx("exiting"); | |||
2918 | /*NOTREACHED*/ | |||
2919 | } | |||
2920 | iff_obj = malloc(sizeof(struct iff)); | |||
2921 | if (iff_obj == NULL((void*)0)) { | |||
2922 | fatal("malloc of iff_obj"); | |||
2923 | /*NOTREACHED*/ | |||
2924 | } | |||
2925 | memcpy((void *)iff_obj, (void *)&ftmp, | |||
2926 | sizeof(struct iff)); | |||
2927 | /* link it to the interface filter */ | |||
2928 | iff_obj->iff_next = ifcp->ifc_filter; | |||
2929 | ifcp->ifc_filter = iff_obj; | |||
2930 | } | |||
2931 | ||||
2932 | /* | |||
2933 | * -A: aggregate configuration. | |||
2934 | */ | |||
2935 | if (filtertype[i] != 'A') | |||
2936 | continue; | |||
2937 | /* put the aggregate to the kernel routing table */ | |||
2938 | rrt = calloc(1, sizeof(struct riprt)); | |||
2939 | if (rrt == NULL((void*)0)) { | |||
2940 | fatal("calloc: rrt"); | |||
2941 | /*NOTREACHED*/ | |||
2942 | } | |||
2943 | rrt->rrt_info.rip6_dest = ftmp.iff_addr; | |||
2944 | rrt->rrt_info.rip6_plen = ftmp.iff_plen; | |||
| ||||
2945 | rrt->rrt_info.rip6_metric = 1; | |||
2946 | rrt->rrt_info.rip6_tag = htons(routetag & 0xffff)(__uint16_t)(__builtin_constant_p(routetag & 0xffff) ? (__uint16_t )(((__uint16_t)(routetag & 0xffff) & 0xffU) << 8 | ((__uint16_t)(routetag & 0xffff) & 0xff00U) >> 8) : __swap16md(routetag & 0xffff)); | |||
2947 | rrt->rrt_gw = in6addr_loopback; | |||
2948 | rrt->rrt_flags = RTF_UP0x1 | RTF_REJECT0x8; | |||
2949 | rrt->rrt_rflags = RRTF_AGGREGATE0x08000000; | |||
2950 | rrt->rrt_t = 0; | |||
2951 | rrt->rrt_index = loopifcp->ifc_index; | |||
2952 | #if 0 | |||
2953 | if (getroute(&rrt->rrt_info, &gw)) { | |||
2954 | #if 0 | |||
2955 | /* | |||
2956 | * When the address has already been registered in the | |||
2957 | * kernel routing table, it should be removed | |||
2958 | */ | |||
2959 | delroute(&rrt->rrt_info, &gw); | |||
2960 | #else | |||
2961 | /* it is safer behavior */ | |||
2962 | errno(*__errno()) = EINVAL22; | |||
2963 | fatal("%s/%u already in routing table, " | |||
2964 | "cannot aggregate", | |||
2965 | inet6_n2p(&rrt->rrt_info.rip6_dest), | |||
2966 | rrt->rrt_info.rip6_plen); | |||
2967 | /*NOTREACHED*/ | |||
2968 | #endif | |||
2969 | } | |||
2970 | #endif | |||
2971 | /* Put the route to the list */ | |||
2972 | rrt->rrt_next = riprt; | |||
2973 | riprt = rrt; | |||
2974 | log_debug("Aggregate: %s/%d for %s", | |||
2975 | inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen, | |||
2976 | ifcp->ifc_name); | |||
2977 | /* Add this route to the kernel */ | |||
2978 | if (nflag) /* do not modify kernel routing table */ | |||
2979 | continue; | |||
2980 | addroute(rrt, &in6addr_loopback, loopifcp); | |||
2981 | } | |||
2982 | } | |||
2983 | ||||
2984 | /***************** utility functions *****************/ | |||
2985 | ||||
2986 | /* | |||
2987 | * Returns a pointer to ifac whose address and prefix length matches | |||
2988 | * with the address and prefix length specified in the arguments. | |||
2989 | */ | |||
2990 | struct ifac * | |||
2991 | ifa_match(const struct ifc *ifcp, const struct in6_addr *ia, int plen) | |||
2992 | { | |||
2993 | struct ifac *ifa; | |||
2994 | ||||
2995 | for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) { | |||
2996 | if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia)(memcmp(&(&ifa->ifa_addr)->__u6_addr.__u6_addr8 [0], &(ia)->__u6_addr.__u6_addr8[0], sizeof(struct in6_addr )) == 0) && | |||
2997 | ifa->ifa_plen == plen) | |||
2998 | break; | |||
2999 | } | |||
3000 | return ifa; | |||
3001 | } | |||
3002 | ||||
3003 | /* | |||
3004 | * Return a pointer to riprt structure whose address and prefix length | |||
3005 | * matches with the address and prefix length found in the argument. | |||
3006 | * Note: This is not a rtalloc(). Therefore exact match is necessary. | |||
3007 | */ | |||
3008 | struct riprt * | |||
3009 | rtsearch(struct netinfo6 *np, struct riprt **prev_rrt) | |||
3010 | { | |||
3011 | struct riprt *rrt; | |||
3012 | ||||
3013 | if (prev_rrt) | |||
3014 | *prev_rrt = NULL((void*)0); | |||
3015 | for (rrt = riprt; rrt; rrt = rrt->rrt_next) { | |||
3016 | if (rrt->rrt_info.rip6_plen == np->rip6_plen && | |||
3017 | IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&np->rip6_dest)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0) | |||
3018 | &np->rip6_dest)(memcmp(&(&rrt->rrt_info.rip6_dest)->__u6_addr. __u6_addr8[0], &(&np->rip6_dest)->__u6_addr.__u6_addr8 [0], sizeof(struct in6_addr)) == 0)) | |||
3019 | return rrt; | |||
3020 | if (prev_rrt) | |||
3021 | *prev_rrt = rrt; | |||
3022 | } | |||
3023 | if (prev_rrt) | |||
3024 | *prev_rrt = NULL((void*)0); | |||
3025 | return 0; | |||
3026 | } | |||
3027 | ||||
3028 | int | |||
3029 | sin6mask2len(const struct sockaddr_in6 *sin6) | |||
3030 | { | |||
3031 | ||||
3032 | return mask2len(&sin6->sin6_addr, | |||
3033 | sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr)__builtin_offsetof(struct sockaddr_in6, sin6_addr)); | |||
3034 | } | |||
3035 | ||||
3036 | int | |||
3037 | mask2len(const struct in6_addr *addr, int lenlim) | |||
3038 | { | |||
3039 | int i = 0, j; | |||
3040 | const u_char *p = (const u_char *)addr; | |||
3041 | ||||
3042 | for (j = 0; j < lenlim; j++, p++) { | |||
3043 | if (*p != 0xff) | |||
3044 | break; | |||
3045 | i += 8; | |||
3046 | } | |||
3047 | if (j < lenlim) { | |||
3048 | switch (*p) { | |||
3049 | #define MASKLEN(m, l) case m: do { i += l; break; } while (0) | |||
3050 | MASKLEN(0xfe, 7); break; | |||
3051 | MASKLEN(0xfc, 6); break; | |||
3052 | MASKLEN(0xf8, 5); break; | |||
3053 | MASKLEN(0xf0, 4); break; | |||
3054 | MASKLEN(0xe0, 3); break; | |||
3055 | MASKLEN(0xc0, 2); break; | |||
3056 | MASKLEN(0x80, 1); break; | |||
3057 | #undef MASKLEN | |||
3058 | } | |||
3059 | } | |||
3060 | return i; | |||
3061 | } | |||
3062 | ||||
3063 | void | |||
3064 | applyplen(struct in6_addr *ia, int plen) | |||
3065 | { | |||
3066 | static const u_char plent[8] = { | |||
3067 | 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe | |||
3068 | }; | |||
3069 | u_char *p; | |||
3070 | int i; | |||
3071 | ||||
3072 | p = ia->s6_addr__u6_addr.__u6_addr8; | |||
3073 | for (i = 0; i < 16; i++) { | |||
3074 | if (plen <= 0) | |||
3075 | *p = 0; | |||
3076 | else if (plen < 8) | |||
3077 | *p &= plent[plen]; | |||
3078 | p++, plen -= 8; | |||
3079 | } | |||
3080 | } | |||
3081 | ||||
3082 | struct in6_addr * | |||
3083 | plen2mask(int n) | |||
3084 | { | |||
3085 | static const int pl2m[9] = { | |||
3086 | 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff | |||
3087 | }; | |||
3088 | static struct in6_addr ia; | |||
3089 | u_char *p; | |||
3090 | int i; | |||
3091 | ||||
3092 | memset(&ia, 0, sizeof(struct in6_addr)); | |||
3093 | p = (u_char *)&ia; | |||
3094 | for (i = 0; i < 16; i++, p++, n -= 8) { | |||
3095 | if (n >= 8) { | |||
3096 | *p = 0xff; | |||
3097 | continue; | |||
3098 | } | |||
3099 | *p = pl2m[n]; | |||
3100 | break; | |||
3101 | } | |||
3102 | return &ia; | |||
3103 | } | |||
3104 | ||||
3105 | char * | |||
3106 | xstrdup(const char *p) | |||
3107 | { | |||
3108 | char *q; | |||
3109 | ||||
3110 | q = strdup(p); | |||
3111 | if (q == NULL((void*)0)) { | |||
3112 | fatal("strdup"); | |||
3113 | /*NOTREACHED*/ | |||
3114 | } | |||
3115 | return q; | |||
3116 | } | |||
3117 | ||||
3118 | const char * | |||
3119 | hms(void) | |||
3120 | { | |||
3121 | static char buf[BUFSIZ1024]; | |||
3122 | time_t t; | |||
3123 | struct tm *tm; | |||
3124 | ||||
3125 | t = time(NULL((void*)0)); | |||
3126 | if ((tm = localtime(&t)) == 0) { | |||
3127 | fatal("localtime"); | |||
3128 | /*NOTREACHED*/ | |||
3129 | } | |||
3130 | snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, | |||
3131 | tm->tm_sec); | |||
3132 | return buf; | |||
3133 | } | |||
3134 | ||||
3135 | #define RIPRANDDEV1.0 1.0 /* 30 +- 15, max - min = 30 */ | |||
3136 | ||||
3137 | int | |||
3138 | ripinterval(int timer) | |||
3139 | { | |||
3140 | double r = arc4random(); | |||
3141 | int interval; | |||
3142 | ||||
3143 | interval = (int)(timer + timer * RIPRANDDEV1.0 * (r / UINT32_MAX0xffffffffU - 0.5)); | |||
3144 | nextalarm = time(NULL((void*)0)) + interval; | |||
3145 | return interval; | |||
3146 | } | |||
3147 | ||||
3148 | time_t | |||
3149 | ripsuptrig(void) | |||
3150 | { | |||
3151 | time_t t; | |||
3152 | ||||
3153 | double r = arc4random(); | |||
3154 | t = (int)(RIP_TRIG_INT6_MIN1 + | |||
3155 | (RIP_TRIG_INT6_MAX5 - RIP_TRIG_INT6_MIN1) * (r / UINT32_MAX0xffffffffU)); | |||
3156 | sup_trig_update = time(NULL((void*)0)) + t; | |||
3157 | return t; | |||
3158 | } | |||
3159 | ||||
3160 | unsigned int | |||
3161 | if_maxindex(void) | |||
3162 | { | |||
3163 | struct if_nameindex *p, *p0; | |||
3164 | unsigned int max = 0; | |||
3165 | ||||
3166 | p0 = if_nameindex(); | |||
3167 | for (p = p0; p && p->if_index && p->if_name; p++) { | |||
3168 | if (max < p->if_index) | |||
3169 | max = p->if_index; | |||
3170 | } | |||
3171 | if_freenameindex(p0); | |||
3172 | return max; | |||
3173 | } | |||
3174 | ||||
3175 | struct ifc * | |||
3176 | ifc_find(char *name) | |||
3177 | { | |||
3178 | struct ifc *ifcp; | |||
3179 | ||||
3180 | for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) { | |||
3181 | if (strcmp(name, ifcp->ifc_name) == 0) | |||
3182 | return ifcp; | |||
3183 | } | |||
3184 | return (struct ifc *)NULL((void*)0); | |||
3185 | } | |||
3186 | ||||
3187 | struct iff * | |||
3188 | iff_find(struct ifc *ifcp, int type) | |||
3189 | { | |||
3190 | struct iff *iffp; | |||
3191 | ||||
3192 | for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) { | |||
3193 | if (iffp->iff_type == type) | |||
3194 | return iffp; | |||
3195 | } | |||
3196 | return NULL((void*)0); | |||
3197 | } | |||
3198 | ||||
3199 | void | |||
3200 | setindex2ifc(int idx, struct ifc *ifcp) | |||
3201 | { | |||
3202 | int n; | |||
3203 | struct ifc **p; | |||
3204 | ||||
3205 | if (!index2ifc) { | |||
3206 | nindex2ifc = 5; /*initial guess*/ | |||
3207 | index2ifc = calloc(nindex2ifc, sizeof(*index2ifc)); | |||
3208 | if (index2ifc == NULL((void*)0)) { | |||
3209 | fatal("calloc"); | |||
3210 | /*NOTREACHED*/ | |||
3211 | } | |||
3212 | } | |||
3213 | n = nindex2ifc; | |||
3214 | while (nindex2ifc <= idx) | |||
3215 | nindex2ifc *= 2; | |||
3216 | if (n != nindex2ifc) { | |||
3217 | p = reallocarray(index2ifc, nindex2ifc, sizeof(*index2ifc)); | |||
3218 | if (p == NULL((void*)0)) { | |||
3219 | fatal("reallocarray"); | |||
3220 | /*NOTREACHED*/ | |||
3221 | } | |||
3222 | memset(p + n, 0, (nindex2ifc - n) * sizeof(*index2ifc)); | |||
3223 | index2ifc = p; | |||
3224 | } | |||
3225 | index2ifc[idx] = ifcp; | |||
3226 | } |