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kernel - Close a few SMP holes
[dragonfly.git] / usr.sbin / route6d / route6d.c
blobd8df30b8ca164c0768c521b7bc0a1e7a12e2d98c
1 /* $FreeBSD: src/usr.sbin/route6d/route6d.c,v 1.2.2.5 2001/07/03 11:02:09 ume Exp $ */
2 /* $KAME: route6d.c,v 1.64 2001/05/08 04:36:37 itojun 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 * $KAME: route6d.c,v 1.64 2001/05/08 04:36:37 itojun Exp $
33 */
34
35 #define _KERNEL_STRUCTURES
36
37 #include <stdio.h>
38
39 #include <time.h>
40 #include <unistd.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <signal.h>
44 #include <stdarg.h>
45 #include <syslog.h>
46 #include <stddef.h>
47 #include <errno.h>
48 #include <err.h>
49
50 #include <sys/types.h>
51 #include <sys/param.h>
52 #include <sys/file.h>
53 #include <sys/socket.h>
54 #include <sys/ioctl.h>
55 #include <sys/sysctl.h>
56 #include <sys/uio.h>
57 #include <net/if.h>
58 #if defined(__DragonFly__)
59 #include <net/if_var.h>
60 #endif /* __DragonFly__ */
61 #include <net/route.h>
62 #include <netinet/in.h>
63 #include <netinet/in_var.h>
64 #include <netinet/ip6.h>
65 #include <netinet/udp.h>
66 #include <netdb.h>
67 #include <ifaddrs.h>
68
69 #include <arpa/inet.h>
70
71 #include "route6d.h"
72
73 #define MAXFILTER 40
74
75 #ifdef DEBUG
76 #define INIT_INTERVAL6 6
77 #else
78 #define INIT_INTERVAL6 10 /* Wait to submit a initial riprequest */
79 #endif
80
81 /*
82 * Following two macros are highly depending on KAME Release
83 */
84 #define IN6_LINKLOCAL_IFINDEX(addr) \
85 ((addr).s6_addr[2] << 8 | (addr).s6_addr[3])
86
87 #define SET_IN6_LINKLOCAL_IFINDEX(addr, index) \
88 do { \
89 (addr).s6_addr[2] = ((index) >> 8) & 0xff; \
90 (addr).s6_addr[3] = (index) & 0xff; \
91 } while (0)
92
93 struct ifc { /* Configuration of an interface */
94 char *ifc_name; /* if name */
95 struct ifc *ifc_next;
96 int ifc_index; /* if index */
97 int ifc_mtu; /* if mtu */
98 int ifc_metric; /* if metric */
99 u_int ifc_flags; /* flags */
100 short ifc_cflags; /* IFC_XXX */
101 struct in6_addr ifc_mylladdr; /* my link-local address */
102 struct sockaddr_in6 ifc_ripsin; /* rip multicast address */
103 struct iff *ifc_filter; /* filter structure */
104 struct ifac *ifc_addr; /* list of AF_INET6 addresses */
105 int ifc_joined; /* joined to ff02::9 */
106 };
107
108 struct ifac { /* Adddress associated to an interface */
109 struct ifc *ifa_conf; /* back pointer */
110 struct ifac *ifa_next;
111 struct in6_addr ifa_addr; /* address */
112 struct in6_addr ifa_raddr; /* remote address, valid in p2p */
113 int ifa_plen; /* prefix length */
114 };
115
116 struct iff {
117 int iff_type;
118 struct in6_addr iff_addr;
119 int iff_plen;
120 struct iff *iff_next;
121 };
122
123 struct ifc *ifc;
124 int nifc; /* number of valid ifc's */
125 struct ifc **index2ifc;
126 int nindex2ifc;
127 struct ifc *loopifcp = NULL; /* pointing to loopback */
128 int loopifindex = 0; /* ditto */
129 fd_set sockvec; /* vector to select() for receiving */
130 int rtsock; /* the routing socket */
131 int ripsock; /* socket to send/receive RIP datagram */
132
133 struct rip6 *ripbuf; /* packet buffer for sending */
134
135 /*
136 * Maintain the routes in a linked list. When the number of the routes
137 * grows, somebody would like to introduce a hash based or a radix tree
138 * based structure. I believe the number of routes handled by RIP is
139 * limited and I don't have to manage a complex data structure, however.
140 *
141 * One of the major drawbacks of the linear linked list is the difficulty
142 * of representing the relationship between a couple of routes. This may
143 * be a significant problem when we have to support route aggregation with
144 * supressing the specifices covered by the aggregate.
145 */
146
147 struct riprt {
148 struct riprt *rrt_next; /* next destination */
149 struct riprt *rrt_same; /* same destination - future use */
150 struct netinfo6 rrt_info; /* network info */
151 struct in6_addr rrt_gw; /* gateway */
152 u_long rrt_flags; /* kernel routing table flags */
153 u_long rrt_rflags; /* route6d routing table flags */
154 time_t rrt_t; /* when the route validated */
155 int rrt_index; /* ifindex from which this route got */
156 };
157
158 struct riprt *riprt = NULL;
159
160 int dflag = 0; /* debug flag */
161 int qflag = 0; /* quiet flag */
162 int nflag = 0; /* don't update kernel routing table */
163 int aflag = 0; /* age out even the statically defined routes */
164 int hflag = 0; /* don't split horizon */
165 int lflag = 0; /* exchange site local routes */
166 int sflag = 0; /* announce static routes w/ split horizon */
167 int Sflag = 0; /* announce static routes to every interface */
168 unsigned long routetag = 0; /* route tag attached on originating case */
169
170 char *filter[MAXFILTER];
171 int filtertype[MAXFILTER];
172 int nfilter = 0;
173
174 pid_t pid;
175
176 struct sockaddr_storage ripsin;
177
178 struct rtentry rtentry;
179
180 int interval = 1;
181 time_t nextalarm = 0;
182 time_t sup_trig_update = 0;
183
184 FILE *rtlog = NULL;
185
186 int logopened = 0;
187
188 static u_long seq = 0;
189
190 volatile int signo;
191 volatile sig_atomic_t seenalrm;
192 volatile sig_atomic_t seenquit;
193 volatile sig_atomic_t seenusr1;
194
195 #define RRTF_AGGREGATE 0x08000000
196 #define RRTF_NOADVERTISE 0x10000000
197 #define RRTF_NH_NOT_LLADDR 0x20000000
198 #define RRTF_SENDANYWAY 0x40000000
199 #define RRTF_CHANGED 0x80000000
200
201 void sighandler(int);
202 void ripalarm(void);
203 void riprecv(void);
204 void ripsend(struct ifc *, struct sockaddr_in6 *, int);
205 int out_filter(struct riprt *, struct ifc *);
206 void init(void);
207 void sockopt(struct ifc *);
208 void ifconfig(void);
209 void ifconfig1(const char *, const struct sockaddr *, struct ifc *, int);
210 void rtrecv(void);
211 int rt_del(const struct sockaddr_in6 *, const struct sockaddr_in6 *,
212 const struct sockaddr_in6 *);
213 int rt_deladdr(struct ifc *, const struct sockaddr_in6 *,
214 const struct sockaddr_in6 *);
215 void filterconfig(void);
216 int getifmtu(int);
217 const char *rttypes(struct rt_msghdr *);
218 const char *rtflags(struct rt_msghdr *);
219 const char *ifflags(int);
220 int ifrt(struct ifc *, int);
221 void ifrt_p2p(struct ifc *, int);
222 void applymask(struct in6_addr *, struct in6_addr *);
223 void applyplen(struct in6_addr *, int);
224 void ifrtdump(int);
225 void ifdump(int);
226 void ifdump0(FILE *, const struct ifc *);
227 void rtdump(int);
228 void rt_entry(struct rt_msghdr *, int);
229 void rtdexit(void);
230 void riprequest(struct ifc *, struct netinfo6 *, int,
231 struct sockaddr_in6 *);
232 void ripflush(struct ifc *, struct sockaddr_in6 *);
233 void sendrequest(struct ifc *);
234 int sin6mask2len(const struct sockaddr_in6 *);
235 int mask2len(const struct in6_addr *, int);
236 int sendpacket(struct sockaddr_in6 *, int);
237 int addroute(struct riprt *, const struct in6_addr *, struct ifc *);
238 int delroute(struct netinfo6 *, struct in6_addr *);
239 struct in6_addr *getroute(struct netinfo6 *, struct in6_addr *);
240 void krtread(int);
241 int tobeadv(struct riprt *, struct ifc *);
242 char *allocopy(char *);
243 char *hms(void);
244 const char *inet6_n2p(const struct in6_addr *);
245 struct ifac *ifa_match(const struct ifc *, const struct in6_addr *, int);
246 struct in6_addr *plen2mask(int);
247 struct riprt *rtsearch(struct netinfo6 *, struct riprt **);
248 int ripinterval(int);
249 time_t ripsuptrig(void);
250 void fatal(const char *, ...)
251 __attribute__((__format__(__printf__, 1, 2)));
252 void trace(int, const char *, ...)
253 __attribute__((__format__(__printf__, 2, 3)));
254 void tracet(int, const char *, ...)
255 __attribute__((__format__(__printf__, 2, 3)));
256 unsigned int if_maxindex(void);
257 struct ifc *ifc_find(char *);
258 struct iff *iff_find(struct ifc *, int);
259 void setindex2ifc(int, struct ifc *);
260
261 #define MALLOC(type) ((type *)malloc(sizeof(type)))
262
263 int
264 main(int argc, char **argv)
265 {
266 int ch;
267 int error = 0;
268 struct ifc *ifcp;
269 sigset_t mask, omask;
270 FILE *pidfile;
271 char *progname;
272 char *ep;
273
274 progname = strrchr(*argv, '/');
275 if (progname)
276 progname++;
277 else
278 progname = *argv;
279
280 pid = getpid();
281 while ((ch = getopt(argc, argv, "A:N:O:R:T:L:t:adDhlnqsS")) != -1) {
282 switch (ch) {
283 case 'A':
284 case 'N':
285 case 'O':
286 case 'T':
287 case 'L':
288 if (nfilter >= MAXFILTER) {
289 fatal("Exceeds MAXFILTER");
290 /*NOTREACHED*/
291 }
292 filtertype[nfilter] = ch;
293 filter[nfilter++] = allocopy(optarg);
294 break;
295 case 't':
296 ep = NULL;
297 routetag = strtoul(optarg, &ep, 0);
298 if (!ep || *ep != '\0' || (routetag & ~0xffff) != 0) {
299 fatal("invalid route tag");
300 /*NOTREACHED*/
301 }
302 break;
303 case 'R':
304 if ((rtlog = fopen(optarg, "w")) == NULL) {
305 fatal("Can not write to routelog");
306 /*NOTREACHED*/
307 }
308 break;
309 #define FLAG(c, flag, n) case c: do { flag = n; break; } while(0)
310 FLAG('a', aflag, 1); break;
311 FLAG('d', dflag, 1); break;
312 FLAG('D', dflag, 2); break;
313 FLAG('h', hflag, 1); break;
314 FLAG('l', lflag, 1); break;
315 FLAG('n', nflag, 1); break;
316 FLAG('q', qflag, 1); break;
317 FLAG('s', sflag, 1); break;
318 FLAG('S', Sflag, 1); break;
319 #undef FLAG
320 default:
321 fatal("Invalid option specified, terminating");
322 /*NOTREACHED*/
323 }
324 }
325 argc -= optind;
326 argv += optind;
327 if (argc > 0) {
328 fatal("bogus extra arguments");
329 /*NOTREACHED*/
330 }
331
332 if (geteuid()) {
333 nflag = 1;
334 fprintf(stderr, "No kernel update is allowed\n");
335 }
336 openlog(progname, LOG_NDELAY|LOG_PID, LOG_DAEMON);
337 logopened++;
338
339 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL)
340 fatal("malloc");
341 memset(ripbuf, 0, RIP6_MAXMTU);
342 ripbuf->rip6_cmd = RIP6_RESPONSE;
343 ripbuf->rip6_vers = RIP6_VERSION;
344 ripbuf->rip6_res1[0] = 0;
345 ripbuf->rip6_res1[1] = 0;
346
347 init();
348 ifconfig();
349 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) {
350 if (ifcp->ifc_index < 0) {
351 fprintf(stderr,
352 "No ifindex found at %s (no link-local address?)\n",
353 ifcp->ifc_name);
354 error++;
355 }
356 }
357 if (error)
358 exit(1);
359 if (loopifcp == NULL) {
360 fatal("No loopback found");
361 /*NOTREACHED*/
362 }
363 loopifindex = loopifcp->ifc_index;
364 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next)
365 ifrt(ifcp, 0);
366 filterconfig();
367 krtread(0);
368 if (dflag)
369 ifrtdump(0);
370
371 if (dflag == 0) {
372 #if 1
373 if (daemon(0, 0) < 0) {
374 fatal("daemon");
375 /*NOTREACHED*/
376 }
377 #else
378 if (fork())
379 exit(0);
380 if (setsid() < 0) {
381 fatal("setid");
382 /*NOTREACHED*/
383 }
384 #endif
385 }
386 pid = getpid();
387 if ((pidfile = fopen(ROUTE6D_PID, "w")) != NULL) {
388 fprintf(pidfile, "%d\n", pid);
389 fclose(pidfile);
390 }
391
392 if ((ripbuf = (struct rip6 *)malloc(RIP6_MAXMTU)) == NULL) {
393 fatal("malloc");
394 /*NOTREACHED*/
395 }
396 memset(ripbuf, 0, RIP6_MAXMTU);
397 ripbuf->rip6_cmd = RIP6_RESPONSE;
398 ripbuf->rip6_vers = RIP6_VERSION;
399 ripbuf->rip6_res1[0] = 0;
400 ripbuf->rip6_res1[1] = 0;
401
402 if (signal(SIGALRM, sighandler) == SIG_ERR ||
403 signal(SIGQUIT, sighandler) == SIG_ERR ||
404 signal(SIGTERM, sighandler) == SIG_ERR ||
405 signal(SIGUSR1, sighandler) == SIG_ERR ||
406 signal(SIGHUP, sighandler) == SIG_ERR ||
407 signal(SIGINT, sighandler) == SIG_ERR) {
408 fatal("signal");
409 /*NOTREACHED*/
410 }
411 /*
412 * To avoid rip packet congestion (not on a cable but in this
413 * process), wait for a moment to send the first RIP6_RESPONSE
414 * packets.
415 */
416 alarm(ripinterval(INIT_INTERVAL6));
417
418 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) {
419 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP))
420 sendrequest(ifcp);
421 }
422
423 syslog(LOG_INFO, "**** Started ****");
424 sigemptyset(&mask);
425 sigaddset(&mask, SIGALRM);
426 while (1) {
427 fd_set recvec;
428
429 if (seenalrm) {
430 ripalarm();
431 seenalrm = 0;
432 continue;
433 }
434 if (seenquit) {
435 rtdexit();
436 seenquit = 0;
437 continue;
438 }
439 if (seenusr1) {
440 ifrtdump(SIGUSR1);
441 seenusr1 = 0;
442 continue;
443 }
444
445 FD_COPY(&sockvec, &recvec);
446 signo = 0;
447 switch (select(FD_SETSIZE, &recvec, 0, 0, 0)) {
448 case -1:
449 if (errno != EINTR) {
450 fatal("select");
451 /*NOTREACHED*/
452 }
453 continue;
454 case 0:
455 continue;
456 default:
457 if (FD_ISSET(ripsock, &recvec)) {
458 sigprocmask(SIG_BLOCK, &mask, &omask);
459 riprecv();
460 sigprocmask(SIG_SETMASK, &omask, NULL);
461 }
462 if (FD_ISSET(rtsock, &recvec)) {
463 sigprocmask(SIG_BLOCK, &mask, &omask);
464 rtrecv();
465 sigprocmask(SIG_SETMASK, &omask, NULL);
466 }
467 }
468 }
469 }
470
471 void
472 sighandler(int sig)
473 {
474
475 signo = sig;
476 switch (signo) {
477 case SIGALRM:
478 seenalrm++;
479 break;
480 case SIGQUIT:
481 case SIGTERM:
482 seenquit++;
483 break;
484 case SIGUSR1:
485 case SIGHUP:
486 case SIGINT:
487 seenusr1++;
488 break;
489 }
490 }
491
492 /*
493 * gracefully exits after resetting sockopts.
494 */
495 /* ARGSUSED */
496 void
497 rtdexit(void)
498 {
499 struct riprt *rrt;
500
501 alarm(0);
502 for (rrt = riprt; rrt; rrt = rrt->rrt_next) {
503 if (rrt->rrt_rflags & RRTF_AGGREGATE) {
504 delroute(&rrt->rrt_info, &rrt->rrt_gw);
505 }
506 }
507 close(ripsock);
508 close(rtsock);
509 syslog(LOG_INFO, "**** Terminated ****");
510 closelog();
511 exit(1);
512 }
513
514 /*
515 * Called periodically:
516 * 1. age out the learned route. remove it if necessary.
517 * 2. submit RIP6_RESPONSE packets.
518 * Invoked in every SUPPLY_INTERVAL6 (30) seconds. I believe we don't have
519 * to invoke this function in every 1 or 5 or 10 seconds only to age the
520 * routes more precisely.
521 */
522 /* ARGSUSED */
523 void
524 ripalarm(void)
525 {
526 struct ifc *ifcp;
527 struct riprt *rrt, *rrt_prev, *rrt_next;
528 time_t t_lifetime, t_holddown;
529
530 /* age the RIP routes */
531 rrt_prev = NULL;
532 t_lifetime = time(NULL) - RIP_LIFETIME;
533 t_holddown = t_lifetime - RIP_HOLDDOWN;
534 for (rrt = riprt; rrt; rrt = rrt_next) {
535 rrt_next = rrt->rrt_next;
536
537 if (rrt->rrt_t == 0) {
538 rrt_prev = rrt;
539 continue;
540 }
541 if (rrt->rrt_t < t_holddown) {
542 if (rrt_prev) {
543 rrt_prev->rrt_next = rrt->rrt_next;
544 } else {
545 riprt = rrt->rrt_next;
546 }
547 delroute(&rrt->rrt_info, &rrt->rrt_gw);
548 free(rrt);
549 continue;
550 }
551 if (rrt->rrt_t < t_lifetime)
552 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
553 rrt_prev = rrt;
554 }
555 /* Supply updates */
556 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) {
557 if (ifcp->ifc_index > 0 && (ifcp->ifc_flags & IFF_UP))
558 ripsend(ifcp, &ifcp->ifc_ripsin, 0);
559 }
560 alarm(ripinterval(SUPPLY_INTERVAL6));
561 }
562
563 void
564 init(void)
565 {
566 int i, int0, int255, error;
567 struct addrinfo hints, *res;
568 char port[10];
569
570 ifc = NULL;
571 nifc = 0;
572 nindex2ifc = 0; /*initial guess*/
573 index2ifc = NULL;
574 snprintf(port, sizeof(port), "%d", RIP6_PORT);
575
576 memset(&hints, 0, sizeof(hints));
577 hints.ai_family = PF_INET6;
578 hints.ai_socktype = SOCK_DGRAM;
579 hints.ai_flags = AI_PASSIVE;
580 error = getaddrinfo(NULL, port, &hints, &res);
581 if (error) {
582 fatal("%s", gai_strerror(error));
583 /*NOTREACHED*/
584 }
585 if (res->ai_next) {
586 fatal(":: resolved to multiple address");
587 /*NOTREACHED*/
588 }
589
590 int0 = 0; int255 = 255;
591 ripsock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
592 if (ripsock < 0) {
593 fatal("rip socket");
594 /*NOTREACHED*/
595 }
596 if (bind(ripsock, res->ai_addr, res->ai_addrlen) < 0) {
597 fatal("rip bind");
598 /*NOTREACHED*/
599 }
600 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
601 &int255, sizeof(int255)) < 0) {
602 fatal("rip IPV6_MULTICAST_HOPS");
603 /*NOTREACHED*/
604 }
605 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
606 &int0, sizeof(int0)) < 0) {
607 fatal("rip IPV6_MULTICAST_LOOP");
608 /*NOTREACHED*/
609 }
610
611 i = 1;
612 #ifdef IPV6_RECVPKTINFO
613 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &i,
614 sizeof(i)) < 0) {
615 fatal("rip IPV6_RECVPKTINFO");
616 /*NOTREACHED*/
617 }
618 #else /* old adv. API */
619 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_PKTINFO, &i,
620 sizeof(i)) < 0) {
621 fatal("rip IPV6_PKTINFO");
622 /*NOTREACHED*/
623 }
624 #endif
625
626 memset(&hints, 0, sizeof(hints));
627 hints.ai_family = PF_INET6;
628 hints.ai_socktype = SOCK_DGRAM;
629 error = getaddrinfo(RIP6_DEST, port, &hints, &res);
630 if (error) {
631 fatal("%s", gai_strerror(error));
632 /*NOTREACHED*/
633 }
634 if (res->ai_next) {
635 fatal("%s resolved to multiple address", RIP6_DEST);
636 /*NOTREACHED*/
637 }
638 memcpy(&ripsin, res->ai_addr, res->ai_addrlen);
639
640 #ifdef FD_ZERO
641 FD_ZERO(&sockvec);
642 #else
643 memset(&sockvec, 0, sizeof(sockvec));
644 #endif
645 FD_SET(ripsock, &sockvec);
646
647 if (nflag == 0) {
648 if ((rtsock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
649 fatal("route socket");
650 /*NOTREACHED*/
651 }
652 FD_SET(rtsock, &sockvec);
653 } else
654 rtsock = -1; /*just for safety */
655 }
656
657 #define RIPSIZE(n) \
658 (sizeof(struct rip6) + ((n)-1) * sizeof(struct netinfo6))
659
660 /*
661 * ripflush flushes the rip datagram stored in the rip buffer
662 */
663 static int nrt;
664 static struct netinfo6 *np;
665
666 void
667 ripflush(struct ifc *ifcp, struct sockaddr_in6 *sin)
668 {
669 int i;
670 int error;
671
672 if (ifcp)
673 tracet(1, "Send(%s): info(%d) to %s.%d\n",
674 ifcp->ifc_name, nrt,
675 inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port));
676 else
677 tracet(1, "Send: info(%d) to %s.%d\n",
678 nrt, inet6_n2p(&sin->sin6_addr), ntohs(sin->sin6_port));
679 if (dflag >= 2) {
680 np = ripbuf->rip6_nets;
681 for (i = 0; i < nrt; i++, np++) {
682 if (np->rip6_metric == NEXTHOP_METRIC) {
683 if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest))
684 trace(2, " NextHop reset");
685 else {
686 trace(2, " NextHop %s",
687 inet6_n2p(&np->rip6_dest));
688 }
689 } else {
690 trace(2, " %s/%d[%d]",
691 inet6_n2p(&np->rip6_dest),
692 np->rip6_plen, np->rip6_metric);
693 }
694 if (np->rip6_tag) {
695 trace(2, " tag=0x%04x",
696 ntohs(np->rip6_tag) & 0xffff);
697 }
698 trace(2, "\n");
699 }
700 }
701 error = sendpacket(sin, RIPSIZE(nrt));
702 if (error == EAFNOSUPPORT) {
703 /* Protocol not supported */
704 tracet(1, "Could not send info to %s (%s): "
705 "set IFF_UP to 0\n",
706 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
707 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */
708 }
709 nrt = 0; np = ripbuf->rip6_nets;
710 }
711
712 /*
713 * Generate RIP6_RESPONSE packets and send them.
714 */
715 void
716 ripsend(struct ifc *ifcp, struct sockaddr_in6 *sin, int flag)
717 {
718 struct riprt *rrt;
719 struct in6_addr *nh; /* next hop */
720 int maxrte;
721
722 if (ifcp == NULL) {
723 /*
724 * Request from non-link local address is not
725 * a regular route6d update.
726 */
727 maxrte = (IFMINMTU - sizeof(struct ip6_hdr) -
728 sizeof(struct udphdr) -
729 sizeof(struct rip6) + sizeof(struct netinfo6)) /
730 sizeof(struct netinfo6);
731 nrt = 0; np = ripbuf->rip6_nets; nh = NULL;
732 for (rrt = riprt; rrt; rrt = rrt->rrt_next) {
733 if (rrt->rrt_rflags & RRTF_NOADVERTISE)
734 continue;
735 /* Put the route to the buffer */
736 *np = rrt->rrt_info;
737 np++; nrt++;
738 if (nrt == maxrte) {
739 ripflush(NULL, sin);
740 nh = NULL;
741 }
742 }
743 if (nrt) /* Send last packet */
744 ripflush(NULL, sin);
745 return;
746 }
747
748 if ((flag & RRTF_SENDANYWAY) == 0 &&
749 (qflag || (ifcp->ifc_flags & IFF_LOOPBACK)))
750 return;
751
752 /* -N: no use */
753 if (iff_find(ifcp, 'N') != NULL)
754 return;
755
756 /* -T: generate default route only */
757 if (iff_find(ifcp, 'T') != NULL) {
758 struct netinfo6 rrt_info;
759 memset(&rrt_info, 0, sizeof(struct netinfo6));
760 rrt_info.rip6_dest = in6addr_any;
761 rrt_info.rip6_plen = 0;
762 rrt_info.rip6_metric = 1;
763 rrt_info.rip6_metric += ifcp->ifc_metric;
764 rrt_info.rip6_tag = htons(routetag & 0xffff);
765 np = ripbuf->rip6_nets;
766 *np = rrt_info;
767 nrt = 1;
768 ripflush(ifcp, sin);
769 return;
770 }
771
772 maxrte = (ifcp->ifc_mtu - sizeof(struct ip6_hdr) -
773 sizeof(struct udphdr) -
774 sizeof(struct rip6) + sizeof(struct netinfo6)) /
775 sizeof(struct netinfo6);
776
777 nrt = 0; np = ripbuf->rip6_nets; nh = NULL;
778 for (rrt = riprt; rrt; rrt = rrt->rrt_next) {
779 if (rrt->rrt_rflags & RRTF_NOADVERTISE)
780 continue;
781
782 /* Need to check filter here */
783 if (out_filter(rrt, ifcp) == 0)
784 continue;
785
786 /* Check split horizon and other conditions */
787 if (tobeadv(rrt, ifcp) == 0)
788 continue;
789
790 /* Only considers the routes with flag if specified */
791 if ((flag & RRTF_CHANGED) &&
792 (rrt->rrt_rflags & RRTF_CHANGED) == 0)
793 continue;
794
795 /* Check nexthop */
796 if (rrt->rrt_index == ifcp->ifc_index &&
797 !IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_gw) &&
798 (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR) == 0) {
799 if (nh == NULL || !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw)) {
800 if (nrt == maxrte - 2)
801 ripflush(ifcp, sin);
802 np->rip6_dest = rrt->rrt_gw;
803 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest))
804 SET_IN6_LINKLOCAL_IFINDEX(np->rip6_dest, 0);
805 np->rip6_plen = 0;
806 np->rip6_tag = 0;
807 np->rip6_metric = NEXTHOP_METRIC;
808 nh = &rrt->rrt_gw;
809 np++; nrt++;
810 }
811 } else if (nh && (rrt->rrt_index != ifcp->ifc_index ||
812 !IN6_ARE_ADDR_EQUAL(nh, &rrt->rrt_gw) ||
813 rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)) {
814 /* Reset nexthop */
815 if (nrt == maxrte - 2)
816 ripflush(ifcp, sin);
817 memset(np, 0, sizeof(struct netinfo6));
818 np->rip6_metric = NEXTHOP_METRIC;
819 nh = NULL;
820 np++; nrt++;
821 }
822
823 /* Put the route to the buffer */
824 *np = rrt->rrt_info;
825 np++; nrt++;
826 if (nrt == maxrte) {
827 ripflush(ifcp, sin);
828 nh = NULL;
829 }
830 }
831 if (nrt) /* Send last packet */
832 ripflush(ifcp, sin);
833 }
834
835 /*
836 * outbound filter logic, per-route/interface.
837 */
838 int
839 out_filter(struct riprt *rrt, struct ifc *ifcp)
840 {
841 struct iff *iffp;
842 struct in6_addr ia;
843 int ok;
844
845 /*
846 * -A: filter out less specific routes, if we have aggregated
847 * route configured.
848 */
849 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) {
850 if (iffp->iff_type != 'A')
851 continue;
852 if (rrt->rrt_info.rip6_plen <= iffp->iff_plen)
853 continue;
854 ia = rrt->rrt_info.rip6_dest;
855 applyplen(&ia, iffp->iff_plen);
856 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr))
857 return 0;
858 }
859
860 /*
861 * if it is an aggregated route, advertise it only to the
862 * interfaces specified on -A.
863 */
864 if ((rrt->rrt_rflags & RRTF_AGGREGATE) != 0) {
865 ok = 0;
866 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) {
867 if (iffp->iff_type != 'A')
868 continue;
869 if (rrt->rrt_info.rip6_plen == iffp->iff_plen &&
870 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
871 &iffp->iff_addr)) {
872 ok = 1;
873 break;
874 }
875 }
876 if (!ok)
877 return 0;
878 }
879
880 /*
881 * -O: advertise only if prefix matches the configured prefix.
882 */
883 if (iff_find(ifcp, 'O')) {
884 ok = 0;
885 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) {
886 if (iffp->iff_type != 'O')
887 continue;
888 if (rrt->rrt_info.rip6_plen < iffp->iff_plen)
889 continue;
890 ia = rrt->rrt_info.rip6_dest;
891 applyplen(&ia, iffp->iff_plen);
892 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) {
893 ok = 1;
894 break;
895 }
896 }
897 if (!ok)
898 return 0;
899 }
900
901 /* the prefix should be advertised */
902 return 1;
903 }
904
905 /*
906 * Determine if the route is to be advertised on the specified interface.
907 * It checks options specified in the arguments and the split horizon rule.
908 */
909 int
910 tobeadv(struct riprt *rrt, struct ifc *ifcp)
911 {
912
913 /* Special care for static routes */
914 if (rrt->rrt_flags & RTF_STATIC) {
915 /* XXX don't advertise reject/blackhole routes */
916 if (rrt->rrt_flags & (RTF_REJECT | RTF_BLACKHOLE))
917 return 0;
918
919 if (Sflag) /* Yes, advertise it anyway */
920 return 1;
921 if (sflag && rrt->rrt_index != ifcp->ifc_index)
922 return 1;
923 return 0;
924 }
925 /* Regular split horizon */
926 if (hflag == 0 && rrt->rrt_index == ifcp->ifc_index)
927 return 0;
928 return 1;
929 }
930
931 /*
932 * Send a rip packet actually.
933 */
934 int
935 sendpacket(struct sockaddr_in6 *sin, int len)
936 {
937 /*
938 * MSG_DONTROUTE should not be specified when it responds with a
939 * RIP6_REQUEST message. SO_DONTROUTE has been specified to
940 * other sockets.
941 */
942 struct msghdr m;
943 struct cmsghdr *cm;
944 struct iovec iov[2];
945 u_char cmsgbuf[256];
946 struct in6_pktinfo *pi;
947 int idx;
948 struct sockaddr_in6 sincopy;
949
950 /* do not overwrite the given sin */
951 sincopy = *sin;
952 sin = &sincopy;
953
954 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)
955 || IN6_IS_ADDR_MULTICAST(&sin->sin6_addr)) {
956 idx = IN6_LINKLOCAL_IFINDEX(sin->sin6_addr);
957 SET_IN6_LINKLOCAL_IFINDEX(sin->sin6_addr, 0);
958 } else
959 idx = 0;
960
961 m.msg_name = (caddr_t)sin;
962 m.msg_namelen = sizeof(*sin);
963 iov[0].iov_base = (caddr_t)ripbuf;
964 iov[0].iov_len = len;
965 m.msg_iov = iov;
966 m.msg_iovlen = 1;
967 if (!idx) {
968 m.msg_control = NULL;
969 m.msg_controllen = 0;
970 } else {
971 memset(cmsgbuf, 0, sizeof(cmsgbuf));
972 cm = (struct cmsghdr *)cmsgbuf;
973 m.msg_control = (caddr_t)cm;
974 m.msg_controllen = CMSG_SPACE(sizeof(struct in6_pktinfo));
975
976 cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
977 cm->cmsg_level = IPPROTO_IPV6;
978 cm->cmsg_type = IPV6_PKTINFO;
979 pi = (struct in6_pktinfo *)CMSG_DATA(cm);
980 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr)); /*::*/
981 pi->ipi6_ifindex = idx;
982 }
983
984 if (sendmsg(ripsock, &m, 0 /*MSG_DONTROUTE*/) < 0) {
985 trace(1, "sendmsg: %s\n", strerror(errno));
986 return errno;
987 }
988
989 return 0;
990 }
991
992 /*
993 * Receive and process RIP packets. Update the routes/kernel forwarding
994 * table if necessary.
995 */
996 void
997 riprecv(void)
998 {
999 struct ifc *ifcp, *ic;
1000 struct sockaddr_in6 fsock;
1001 struct in6_addr nh; /* next hop */
1002 struct rip6 *rp;
1003 struct netinfo6 *np, *nq;
1004 struct riprt *rrt;
1005 int len, nn, need_trigger, idx;
1006 char buf[4 * RIP6_MAXMTU];
1007 time_t t;
1008 struct msghdr m;
1009 struct cmsghdr *cm;
1010 struct iovec iov[2];
1011 u_char cmsgbuf[256];
1012 struct in6_pktinfo *pi;
1013 struct iff *iffp;
1014 struct in6_addr ia;
1015 int ok;
1016 time_t t_half_lifetime;
1017
1018 need_trigger = 0;
1019
1020 m.msg_name = (caddr_t)&fsock;
1021 m.msg_namelen = sizeof(fsock);
1022 iov[0].iov_base = (caddr_t)buf;
1023 iov[0].iov_len = sizeof(buf);
1024 m.msg_iov = iov;
1025 m.msg_iovlen = 1;
1026 cm = (struct cmsghdr *)cmsgbuf;
1027 m.msg_control = (caddr_t)cm;
1028 m.msg_controllen = sizeof(cmsgbuf);
1029 if ((len = recvmsg(ripsock, &m, 0)) < 0) {
1030 fatal("recvmsg");
1031 /*NOTREACHED*/
1032 }
1033 idx = 0;
1034 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(&m);
1035 cm;
1036 cm = (struct cmsghdr *)CMSG_NXTHDR(&m, cm)) {
1037 if (cm->cmsg_level == IPPROTO_IPV6 &&
1038 cm->cmsg_type == IPV6_PKTINFO) {
1039 pi = (struct in6_pktinfo *)(CMSG_DATA(cm));
1040 idx = pi->ipi6_ifindex;
1041 break;
1042 }
1043 }
1044 if (idx && IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr))
1045 SET_IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr, idx);
1046
1047 nh = fsock.sin6_addr;
1048 nn = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
1049 sizeof(struct netinfo6);
1050 rp = (struct rip6 *)buf;
1051 np = rp->rip6_nets;
1052
1053 if (rp->rip6_vers != RIP6_VERSION) {
1054 trace(1, "Incorrect RIP version %d\n", rp->rip6_vers);
1055 return;
1056 }
1057 if (rp->rip6_cmd == RIP6_REQUEST) {
1058 if (idx && idx < nindex2ifc) {
1059 ifcp = index2ifc[idx];
1060 riprequest(ifcp, np, nn, &fsock);
1061 } else {
1062 riprequest(NULL, np, nn, &fsock);
1063 }
1064 return;
1065 }
1066
1067 if (!IN6_IS_ADDR_LINKLOCAL(&fsock.sin6_addr)) {
1068 trace(1, "Packets from non-ll addr: %s\n",
1069 inet6_n2p(&fsock.sin6_addr));
1070 return; /* Ignore packets from non-link-local addr */
1071 }
1072 idx = IN6_LINKLOCAL_IFINDEX(fsock.sin6_addr);
1073 ifcp = (idx < nindex2ifc) ? index2ifc[idx] : NULL;
1074 if (!ifcp) {
1075 trace(1, "Packets to unknown interface index %d\n", idx);
1076 return; /* Ignore it */
1077 }
1078 if (IN6_ARE_ADDR_EQUAL(&ifcp->ifc_mylladdr, &fsock.sin6_addr))
1079 return; /* The packet is from me; ignore */
1080 if (rp->rip6_cmd != RIP6_RESPONSE) {
1081 trace(1, "Invalid command %d\n", rp->rip6_cmd);
1082 return;
1083 }
1084
1085 /* -N: no use */
1086 if (iff_find(ifcp, 'N') != NULL)
1087 return;
1088
1089 tracet(1, "Recv(%s): from %s.%d info(%d)\n",
1090 ifcp->ifc_name, inet6_n2p(&nh), ntohs(fsock.sin6_port), nn);
1091
1092 t = time(NULL);
1093 t_half_lifetime = t - (RIP_LIFETIME/2);
1094 for (; nn; nn--, np++) {
1095 if (np->rip6_metric == NEXTHOP_METRIC) {
1096 /* modify neighbor address */
1097 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) {
1098 nh = np->rip6_dest;
1099 SET_IN6_LINKLOCAL_IFINDEX(nh, idx);
1100 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh));
1101 } else if (IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest)) {
1102 nh = fsock.sin6_addr;
1103 trace(1, "\tNexthop: %s\n", inet6_n2p(&nh));
1104 } else {
1105 nh = fsock.sin6_addr;
1106 trace(1, "\tInvalid Nexthop: %s\n",
1107 inet6_n2p(&np->rip6_dest));
1108 }
1109 continue;
1110 }
1111 if (IN6_IS_ADDR_MULTICAST(&np->rip6_dest)) {
1112 trace(1, "\tMulticast netinfo6: %s/%d [%d]\n",
1113 inet6_n2p(&np->rip6_dest),
1114 np->rip6_plen, np->rip6_metric);
1115 continue;
1116 }
1117 if (IN6_IS_ADDR_LOOPBACK(&np->rip6_dest)) {
1118 trace(1, "\tLoopback netinfo6: %s/%d [%d]\n",
1119 inet6_n2p(&np->rip6_dest),
1120 np->rip6_plen, np->rip6_metric);
1121 continue;
1122 }
1123 if (IN6_IS_ADDR_LINKLOCAL(&np->rip6_dest)) {
1124 trace(1, "\tLink Local netinfo6: %s/%d [%d]\n",
1125 inet6_n2p(&np->rip6_dest),
1126 np->rip6_plen, np->rip6_metric);
1127 continue;
1128 }
1129 /* may need to pass sitelocal prefix in some case, however*/
1130 if (IN6_IS_ADDR_SITELOCAL(&np->rip6_dest) && !lflag) {
1131 trace(1, "\tSite Local netinfo6: %s/%d [%d]\n",
1132 inet6_n2p(&np->rip6_dest),
1133 np->rip6_plen, np->rip6_metric);
1134 continue;
1135 }
1136 trace(2, "\tnetinfo6: %s/%d [%d]",
1137 inet6_n2p(&np->rip6_dest),
1138 np->rip6_plen, np->rip6_metric);
1139 if (np->rip6_tag)
1140 trace(2, " tag=0x%04x", ntohs(np->rip6_tag) & 0xffff);
1141 if (dflag >= 2) {
1142 ia = np->rip6_dest;
1143 applyplen(&ia, np->rip6_plen);
1144 if (!IN6_ARE_ADDR_EQUAL(&ia, &np->rip6_dest))
1145 trace(2, " [junk outside prefix]");
1146 }
1147
1148 /*
1149 * -L: listen only if the prefix matches the configuration
1150 */
1151 ok = 1; /* if there's no L filter, it is ok */
1152 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) {
1153 if (iffp->iff_type != 'L')
1154 continue;
1155 ok = 0;
1156 if (np->rip6_plen < iffp->iff_plen)
1157 continue;
1158 /* special rule: ::/0 means default, not "in /0" */
1159 if (iffp->iff_plen == 0 && np->rip6_plen > 0)
1160 continue;
1161 ia = np->rip6_dest;
1162 applyplen(&ia, iffp->iff_plen);
1163 if (IN6_ARE_ADDR_EQUAL(&ia, &iffp->iff_addr)) {
1164 ok = 1;
1165 break;
1166 }
1167 }
1168 if (!ok) {
1169 trace(2, " (filtered)\n");
1170 continue;
1171 }
1172
1173 trace(2, "\n");
1174 np->rip6_metric++;
1175 np->rip6_metric += ifcp->ifc_metric;
1176 if (np->rip6_metric > HOPCNT_INFINITY6)
1177 np->rip6_metric = HOPCNT_INFINITY6;
1178
1179 applyplen(&np->rip6_dest, np->rip6_plen);
1180 if ((rrt = rtsearch(np, NULL)) != NULL) {
1181 if (rrt->rrt_t == 0)
1182 continue; /* Intf route has priority */
1183 nq = &rrt->rrt_info;
1184 if (nq->rip6_metric > np->rip6_metric) {
1185 if (rrt->rrt_index == ifcp->ifc_index &&
1186 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
1187 /* Small metric from the same gateway */
1188 nq->rip6_metric = np->rip6_metric;
1189 } else {
1190 /* Better route found */
1191 rrt->rrt_index = ifcp->ifc_index;
1192 /* Update routing table */
1193 delroute(nq, &rrt->rrt_gw);
1194 rrt->rrt_gw = nh;
1195 *nq = *np;
1196 addroute(rrt, &nh, ifcp);
1197 }
1198 rrt->rrt_rflags |= RRTF_CHANGED;
1199 rrt->rrt_t = t;
1200 need_trigger = 1;
1201 } else if (nq->rip6_metric < np->rip6_metric &&
1202 rrt->rrt_index == ifcp->ifc_index &&
1203 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
1204 /* Got worse route from same gw */
1205 nq->rip6_metric = np->rip6_metric;
1206 rrt->rrt_t = t;
1207 rrt->rrt_rflags |= RRTF_CHANGED;
1208 need_trigger = 1;
1209 } else if (nq->rip6_metric == np->rip6_metric &&
1210 np->rip6_metric < HOPCNT_INFINITY6) {
1211 if (rrt->rrt_index == ifcp->ifc_index &&
1212 IN6_ARE_ADDR_EQUAL(&nh, &rrt->rrt_gw)) {
1213 /* same metric, same route from same gw */
1214 rrt->rrt_t = t;
1215 } else if (rrt->rrt_t < t_half_lifetime) {
1216 /* Better route found */
1217 rrt->rrt_index = ifcp->ifc_index;
1218 /* Update routing table */
1219 delroute(nq, &rrt->rrt_gw);
1220 rrt->rrt_gw = nh;
1221 *nq = *np;
1222 addroute(rrt, &nh, ifcp);
1223 rrt->rrt_rflags |= RRTF_CHANGED;
1224 rrt->rrt_t = t;
1225 }
1226 }
1227 /*
1228 * if nq->rip6_metric == HOPCNT_INFINITY6 then
1229 * do not update age value. Do nothing.
1230 */
1231 } else if (np->rip6_metric < HOPCNT_INFINITY6) {
1232 /* Got a new valid route */
1233 if ((rrt = MALLOC(struct riprt)) == NULL) {
1234 fatal("malloc: struct riprt");
1235 /*NOTREACHED*/
1236 }
1237 memset(rrt, 0, sizeof(*rrt));
1238 nq = &rrt->rrt_info;
1239
1240 rrt->rrt_same = NULL;
1241 rrt->rrt_index = ifcp->ifc_index;
1242 rrt->rrt_flags = RTF_UP|RTF_GATEWAY;
1243 rrt->rrt_gw = nh;
1244 *nq = *np;
1245 applyplen(&nq->rip6_dest, nq->rip6_plen);
1246 if (nq->rip6_plen == sizeof(struct in6_addr) * 8)
1247 rrt->rrt_flags |= RTF_HOST;
1248
1249 /* Put the route to the list */
1250 rrt->rrt_next = riprt;
1251 riprt = rrt;
1252 /* Update routing table */
1253 addroute(rrt, &nh, ifcp);
1254 rrt->rrt_rflags |= RRTF_CHANGED;
1255 need_trigger = 1;
1256 rrt->rrt_t = t;
1257 }
1258 }
1259 /* XXX need to care the interval between triggered updates */
1260 if (need_trigger) {
1261 if (nextalarm > time(NULL) + RIP_TRIG_INT6_MAX) {
1262 for (ic = ifc; ic; ic = ic->ifc_next) {
1263 if (ifcp->ifc_index == ic->ifc_index)
1264 continue;
1265 if (ic->ifc_flags & IFF_UP)
1266 ripsend(ic, &ic->ifc_ripsin,
1267 RRTF_CHANGED);
1268 }
1269 }
1270 /* Reset the flag */
1271 for (rrt = riprt; rrt; rrt = rrt->rrt_next)
1272 rrt->rrt_rflags &= ~RRTF_CHANGED;
1273 }
1274 }
1275
1276 /*
1277 * Send all routes request packet to the specified interface.
1278 */
1279 void
1280 sendrequest(struct ifc *ifcp)
1281 {
1282 struct netinfo6 *np;
1283 int error;
1284
1285 if (ifcp->ifc_flags & IFF_LOOPBACK)
1286 return;
1287 ripbuf->rip6_cmd = RIP6_REQUEST;
1288 np = ripbuf->rip6_nets;
1289 memset(np, 0, sizeof(struct netinfo6));
1290 np->rip6_metric = HOPCNT_INFINITY6;
1291 tracet(1, "Send rtdump Request to %s (%s)\n",
1292 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
1293 error = sendpacket(&ifcp->ifc_ripsin, RIPSIZE(1));
1294 if (error == EAFNOSUPPORT) {
1295 /* Protocol not supported */
1296 tracet(1, "Could not send rtdump Request to %s (%s): "
1297 "set IFF_UP to 0\n",
1298 ifcp->ifc_name, inet6_n2p(&ifcp->ifc_ripsin.sin6_addr));
1299 ifcp->ifc_flags &= ~IFF_UP; /* As if down for AF_INET6 */
1300 }
1301 ripbuf->rip6_cmd = RIP6_RESPONSE;
1302 }
1303
1304 /*
1305 * Process a RIP6_REQUEST packet.
1306 */
1307 void
1308 riprequest(struct ifc *ifcp, struct netinfo6 *np, int nn,
1309 struct sockaddr_in6 *sin)
1310 {
1311 int i;
1312 struct riprt *rrt;
1313
1314 if (!(nn == 1 && IN6_IS_ADDR_UNSPECIFIED(&np->rip6_dest) &&
1315 np->rip6_plen == 0 && np->rip6_metric == HOPCNT_INFINITY6)) {
1316 /* Specific response, don't split-horizon */
1317 trace(1, "\tRIP Request\n");
1318 for (i = 0; i < nn; i++, np++) {
1319 rrt = rtsearch(np, NULL);
1320 if (rrt)
1321 np->rip6_metric = rrt->rrt_info.rip6_metric;
1322 else
1323 np->rip6_metric = HOPCNT_INFINITY6;
1324 }
1325 sendpacket(sin, RIPSIZE(nn));
1326 return;
1327 }
1328 /* Whole routing table dump */
1329 trace(1, "\tRIP Request -- whole routing table\n");
1330 ripsend(ifcp, sin, RRTF_SENDANYWAY);
1331 }
1332
1333 /*
1334 * Get information of each interface.
1335 */
1336 void
1337 ifconfig(void)
1338 {
1339 struct ifaddrs *ifap, *ifa;
1340 struct ifc *ifcp;
1341 struct ipv6_mreq mreq;
1342 int s;
1343
1344 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1345 fatal("socket");
1346 /*NOTREACHED*/
1347 }
1348
1349 if (getifaddrs(&ifap) != 0) {
1350 fatal("getifaddrs");
1351 /*NOTREACHED*/
1352 }
1353
1354 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1355 if (ifa->ifa_addr->sa_family != AF_INET6)
1356 continue;
1357 ifcp = ifc_find(ifa->ifa_name);
1358 /* we are interested in multicast-capable interfaces */
1359 if ((ifa->ifa_flags & IFF_MULTICAST) == 0)
1360 continue;
1361 if (!ifcp) {
1362 /* new interface */
1363 if ((ifcp = MALLOC(struct ifc)) == NULL) {
1364 fatal("malloc: struct ifc");
1365 /*NOTREACHED*/
1366 }
1367 memset(ifcp, 0, sizeof(*ifcp));
1368 ifcp->ifc_index = -1;
1369 ifcp->ifc_next = ifc;
1370 ifc = ifcp;
1371 nifc++;
1372 ifcp->ifc_name = allocopy(ifa->ifa_name);
1373 ifcp->ifc_addr = NULL;
1374 ifcp->ifc_filter = NULL;
1375 ifcp->ifc_flags = ifa->ifa_flags;
1376 trace(1, "newif %s <%s>\n", ifcp->ifc_name,
1377 ifflags(ifcp->ifc_flags));
1378 if (!strcmp(ifcp->ifc_name, LOOPBACK_IF))
1379 loopifcp = ifcp;
1380 } else {
1381 /* update flag, this may be up again */
1382 if (ifcp->ifc_flags != ifa->ifa_flags) {
1383 trace(1, "%s: <%s> -> ", ifcp->ifc_name,
1384 ifflags(ifcp->ifc_flags));
1385 trace(1, "<%s>\n", ifflags(ifa->ifa_flags));
1386 ifcp->ifc_cflags |= IFC_CHANGED;
1387 }
1388 ifcp->ifc_flags = ifa->ifa_flags;
1389 }
1390 ifconfig1(ifa->ifa_name, ifa->ifa_addr, ifcp, s);
1391 if ((ifcp->ifc_flags & (IFF_LOOPBACK | IFF_UP)) == IFF_UP
1392 && 0 < ifcp->ifc_index && !ifcp->ifc_joined) {
1393 mreq.ipv6mr_multiaddr = ifcp->ifc_ripsin.sin6_addr;
1394 mreq.ipv6mr_interface = ifcp->ifc_index;
1395 if (setsockopt(ripsock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
1396 &mreq, sizeof(mreq)) < 0) {
1397 fatal("IPV6_JOIN_GROUP");
1398 /*NOTREACHED*/
1399 }
1400 trace(1, "join %s %s\n", ifcp->ifc_name, RIP6_DEST);
1401 ifcp->ifc_joined++;
1402 }
1403 }
1404 close(s);
1405 freeifaddrs(ifap);
1406 }
1407
1408 void
1409 ifconfig1(const char *name, const struct sockaddr *sa, struct ifc *ifcp, int s)
1410 {
1411 struct in6_ifreq ifr;
1412 const struct sockaddr_in6 *sin;
1413 struct ifac *ifa;
1414 int plen;
1415 char buf[BUFSIZ];
1416
1417 sin = (const struct sockaddr_in6 *)sa;
1418 ifr.ifr_addr = *sin;
1419 strcpy(ifr.ifr_name, name);
1420 if (ioctl(s, SIOCGIFNETMASK_IN6, (char *)&ifr) < 0) {
1421 fatal("ioctl: SIOCGIFNETMASK_IN6");
1422 /*NOTREACHED*/
1423 }
1424 plen = sin6mask2len(&ifr.ifr_addr);
1425 if ((ifa = ifa_match(ifcp, &sin->sin6_addr, plen)) != NULL) {
1426 /* same interface found */
1427 /* need check if something changed */
1428 /* XXX not yet implemented */
1429 return;
1430 }
1431 /*
1432 * New address is found
1433 */
1434 if ((ifa = MALLOC(struct ifac)) == NULL) {
1435 fatal("malloc: struct ifac");
1436 /*NOTREACHED*/
1437 }
1438 memset(ifa, 0, sizeof(*ifa));
1439 ifa->ifa_conf = ifcp;
1440 ifa->ifa_next = ifcp->ifc_addr;
1441 ifcp->ifc_addr = ifa;
1442 ifa->ifa_addr = sin->sin6_addr;
1443 ifa->ifa_plen = plen;
1444 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
1445 ifr.ifr_addr = *sin;
1446 if (ioctl(s, SIOCGIFDSTADDR_IN6, (char *)&ifr) < 0) {
1447 fatal("ioctl: SIOCGIFDSTADDR_IN6");
1448 /*NOTREACHED*/
1449 }
1450 ifa->ifa_raddr = ifr.ifr_dstaddr.sin6_addr;
1451 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr, buf, sizeof(buf));
1452 trace(1, "found address %s/%d -- %s\n",
1453 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen, buf);
1454 } else {
1455 trace(1, "found address %s/%d\n",
1456 inet6_n2p(&ifa->ifa_addr), ifa->ifa_plen);
1457 }
1458 if (ifcp->ifc_index < 0 && IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) {
1459 ifcp->ifc_mylladdr = ifa->ifa_addr;
1460 ifcp->ifc_index = IN6_LINKLOCAL_IFINDEX(ifa->ifa_addr);
1461 memcpy(&ifcp->ifc_ripsin, &ripsin, ripsin.ss_len);
1462 SET_IN6_LINKLOCAL_IFINDEX(ifcp->ifc_ripsin.sin6_addr,
1463 ifcp->ifc_index);
1464 setindex2ifc(ifcp->ifc_index, ifcp);
1465 ifcp->ifc_mtu = getifmtu(ifcp->ifc_index);
1466 if (ifcp->ifc_mtu > RIP6_MAXMTU)
1467 ifcp->ifc_mtu = RIP6_MAXMTU;
1468 if (ioctl(s, SIOCGIFMETRIC, (char *)&ifr) < 0) {
1469 fatal("ioctl: SIOCGIFMETRIC");
1470 /*NOTREACHED*/
1471 }
1472 ifcp->ifc_metric = ifr.ifr_metric;
1473 trace(1, "\tindex: %d, mtu: %d, metric: %d\n",
1474 ifcp->ifc_index, ifcp->ifc_mtu, ifcp->ifc_metric);
1475 } else
1476 ifcp->ifc_cflags |= IFC_CHANGED;
1477 }
1478
1479 /*
1480 * Receive and process routing messages.
1481 * Update interface information as necesssary.
1482 */
1483 void
1484 rtrecv(void)
1485 {
1486 char buf[BUFSIZ];
1487 char *p, *q;
1488 struct rt_msghdr *rtm;
1489 struct ifa_msghdr *ifam;
1490 struct if_msghdr *ifm;
1491 int len;
1492 struct ifc *ifcp, *ic;
1493 int iface = 0, rtable = 0;
1494 struct sockaddr_in6 *rta[RTAX_MAX];
1495 struct sockaddr_in6 mask;
1496 int i, addrs;
1497 struct riprt *rrt;
1498
1499 if ((len = read(rtsock, buf, sizeof(buf))) < 0) {
1500 perror("read from rtsock");
1501 exit(1);
1502 }
1503 if (len < sizeof(*rtm)) {
1504 trace(1, "short read from rtsock: %d (should be > %lu)\n",
1505 len, (u_long)sizeof(*rtm));
1506 return;
1507 }
1508
1509 for (p = buf; p - buf < len; p += ((struct rt_msghdr *)p)->rtm_msglen) {
1510 /* safety against bogus message */
1511 if (((struct rt_msghdr *)p)->rtm_msglen <= 0) {
1512 trace(1, "bogus rtmsg: length=%d\n",
1513 ((struct rt_msghdr *)p)->rtm_msglen);
1514 break;
1515 }
1516 rtm = NULL;
1517 ifam = NULL;
1518 ifm = NULL;
1519 switch (((struct rt_msghdr *)p)->rtm_type) {
1520 case RTM_NEWADDR:
1521 case RTM_DELADDR:
1522 ifam = (struct ifa_msghdr *)p;
1523 addrs = ifam->ifam_addrs;
1524 q = (char *)(ifam + 1);
1525 break;
1526 case RTM_IFINFO:
1527 ifm = (struct if_msghdr *)p;
1528 addrs = ifm->ifm_addrs;
1529 q = (char *)(ifm + 1);
1530 break;
1531 default:
1532 rtm = (struct rt_msghdr *)p;
1533 addrs = rtm->rtm_addrs;
1534 q = (char *)(rtm + 1);
1535 if (rtm->rtm_version != RTM_VERSION) {
1536 trace(1, "unexpected rtmsg version %d "
1537 "(should be %d)\n",
1538 rtm->rtm_version, RTM_VERSION);
1539 continue;
1540 }
1541 if (rtm->rtm_pid == pid) {
1542 #if 0
1543 trace(1, "rtmsg looped back to me, ignored\n");
1544 #endif
1545 continue;
1546 }
1547 break;
1548 }
1549 memset(&rta, 0, sizeof(rta));
1550 for (i = 0; i < RTAX_MAX; i++) {
1551 if (addrs & (1 << i)) {
1552 rta[i] = (struct sockaddr_in6 *)q;
1553 q += RT_ROUNDUP(rta[i]->sin6_len);
1554 }
1555 }
1556
1557 trace(1, "rtsock: %s (addrs=%x)\n",
1558 rttypes((struct rt_msghdr *)p), addrs);
1559 if (dflag >= 2) {
1560 for (i = 0;
1561 i < ((struct rt_msghdr *)p)->rtm_msglen;
1562 i++) {
1563 fprintf(stderr, "%02x ", p[i] & 0xff);
1564 if (i % 16 == 15) fprintf(stderr, "\n");
1565 }
1566 fprintf(stderr, "\n");
1567 }
1568
1569 /*
1570 * Easy ones first.
1571 *
1572 * We may be able to optimize by using ifm->ifm_index or
1573 * ifam->ifam_index. For simplicity we don't do that here.
1574 */
1575 switch (((struct rt_msghdr *)p)->rtm_type) {
1576 case RTM_NEWADDR:
1577 case RTM_IFINFO:
1578 iface++;
1579 continue;
1580 case RTM_ADD:
1581 rtable++;
1582 continue;
1583 case RTM_LOSING:
1584 case RTM_MISS:
1585 case RTM_RESOLVE:
1586 case RTM_GET:
1587 case RTM_LOCK:
1588 /* nothing to be done here */
1589 trace(1, "\tnothing to be done, ignored\n");
1590 continue;
1591 }
1592
1593 #if 0
1594 if (rta[RTAX_DST] == NULL) {
1595 trace(1, "\tno destination, ignored\n");
1596 continue;
1597 }
1598 if (rta[RTAX_DST]->sin6_family != AF_INET6) {
1599 trace(1, "\taf mismatch, ignored\n");
1600 continue;
1601 }
1602 if (IN6_IS_ADDR_LINKLOCAL(&rta[RTAX_DST]->sin6_addr)) {
1603 trace(1, "\tlinklocal destination, ignored\n");
1604 continue;
1605 }
1606 if (IN6_ARE_ADDR_EQUAL(&rta[RTAX_DST]->sin6_addr, &in6addr_loopback)) {
1607 trace(1, "\tloopback destination, ignored\n");
1608 continue; /* Loopback */
1609 }
1610 if (IN6_IS_ADDR_MULTICAST(&rta[RTAX_DST]->sin6_addr)) {
1611 trace(1, "\tmulticast destination, ignored\n");
1612 continue;
1613 }
1614 #endif
1615
1616 /* hard ones */
1617 switch (((struct rt_msghdr *)p)->rtm_type) {
1618 case RTM_NEWADDR:
1619 case RTM_IFINFO:
1620 case RTM_ADD:
1621 case RTM_LOSING:
1622 case RTM_MISS:
1623 case RTM_RESOLVE:
1624 case RTM_GET:
1625 case RTM_LOCK:
1626 /* should already be handled */
1627 fatal("rtrecv: never reach here");
1628 /*NOTREACHED*/
1629 case RTM_DELETE:
1630 if (!rta[RTAX_DST] || !rta[RTAX_GATEWAY]) {
1631 trace(1, "\tsome of dst/gw/netamsk are "
1632 "unavailable, ignored\n");
1633 break;
1634 }
1635 if ((rtm->rtm_flags & RTF_HOST) != 0) {
1636 mask.sin6_len = sizeof(mask);
1637 memset(&mask.sin6_addr, 0xff,
1638 sizeof(mask.sin6_addr));
1639 rta[RTAX_NETMASK] = &mask;
1640 } else if (!rta[RTAX_NETMASK]) {
1641 trace(1, "\tsome of dst/gw/netamsk are "
1642 "unavailable, ignored\n");
1643 break;
1644 }
1645 if (rt_del(rta[RTAX_DST], rta[RTAX_GATEWAY],
1646 rta[RTAX_NETMASK]) == 0) {
1647 rtable++; /*just to be sure*/
1648 }
1649 break;
1650 case RTM_CHANGE:
1651 case RTM_REDIRECT:
1652 trace(1, "\tnot supported yet, ignored\n");
1653 break;
1654 case RTM_DELADDR:
1655 if (!rta[RTAX_NETMASK] || !rta[RTAX_IFA]) {
1656 trace(1, "\tno netmask or ifa given, ignored\n");
1657 break;
1658 }
1659 if (ifam->ifam_index < nindex2ifc)
1660 ifcp = index2ifc[ifam->ifam_index];
1661 else
1662 ifcp = NULL;
1663 if (!ifcp) {
1664 trace(1, "\tinvalid ifam_index %d, ignored\n",
1665 ifam->ifam_index);
1666 break;
1667 }
1668 if (!rt_deladdr(ifcp, rta[RTAX_IFA], rta[RTAX_NETMASK]))
1669 iface++;
1670 break;
1671 case RTM_OLDADD:
1672 case RTM_OLDDEL:
1673 trace(1, "\tnot supported yet, ignored\n");
1674 break;
1675 }
1676
1677 }
1678
1679 if (iface) {
1680 trace(1, "rtsock: reconfigure interfaces, refresh interface routes\n");
1681 ifconfig();
1682 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next)
1683 if (ifcp->ifc_cflags & IFC_CHANGED) {
1684 if (ifrt(ifcp, 1)) {
1685 for (ic = ifc; ic; ic = ic->ifc_next) {
1686 if (ifcp->ifc_index == ic->ifc_index)
1687 continue;
1688 if (ic->ifc_flags & IFF_UP)
1689 ripsend(ic, &ic->ifc_ripsin,
1690 RRTF_CHANGED);
1691 }
1692 /* Reset the flag */
1693 for (rrt = riprt; rrt; rrt = rrt->rrt_next)
1694 rrt->rrt_rflags &= ~RRTF_CHANGED;
1695 }
1696 ifcp->ifc_cflags &= ~IFC_CHANGED;
1697 }
1698 }
1699 if (rtable) {
1700 trace(1, "rtsock: read routing table again\n");
1701 krtread(1);
1702 }
1703 }
1704
1705 /*
1706 * remove specified route from the internal routing table.
1707 */
1708 int
1709 rt_del(const struct sockaddr_in6 *sdst, const struct sockaddr_in6 *sgw,
1710 const struct sockaddr_in6 *smask)
1711 {
1712 const struct in6_addr *dst = NULL;
1713 const struct in6_addr *gw = NULL;
1714 int prefix;
1715 struct netinfo6 ni6;
1716 struct riprt *rrt = NULL;
1717 time_t t_lifetime;
1718
1719 if (sdst->sin6_family != AF_INET6) {
1720 trace(1, "\tother AF, ignored\n");
1721 return -1;
1722 }
1723 if (IN6_IS_ADDR_LINKLOCAL(&sdst->sin6_addr)
1724 || IN6_ARE_ADDR_EQUAL(&sdst->sin6_addr, &in6addr_loopback)
1725 || IN6_IS_ADDR_MULTICAST(&sdst->sin6_addr)) {
1726 trace(1, "\taddress %s not interesting, ignored\n",
1727 inet6_n2p(&sdst->sin6_addr));
1728 return -1;
1729 }
1730 dst = &sdst->sin6_addr;
1731 if (sgw->sin6_family == AF_INET6) {
1732 /* easy case */
1733 gw = &sgw->sin6_addr;
1734 prefix = sin6mask2len(smask);
1735 } else if (sgw->sin6_family == AF_LINK) {
1736 /*
1737 * Interface route... a hard case. We need to get the prefix
1738 * length from the kernel, but we now are parsing rtmsg.
1739 * We'll purge matching routes from my list, then get the
1740 * fresh list.
1741 */
1742 struct riprt *longest;
1743 trace(1, "\t%s is a interface route, guessing prefixlen\n",
1744 inet6_n2p(dst));
1745 longest = NULL;
1746 for (rrt = riprt; rrt; rrt = rrt->rrt_next) {
1747 if (IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
1748 &sdst->sin6_addr)
1749 && IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)) {
1750 if (!longest
1751 || longest->rrt_info.rip6_plen <
1752 rrt->rrt_info.rip6_plen) {
1753 longest = rrt;
1754 }
1755 }
1756 }
1757 rrt = longest;
1758 if (!rrt) {
1759 trace(1, "\tno matching interface route found\n");
1760 return -1;
1761 }
1762 gw = &in6addr_loopback;
1763 prefix = rrt->rrt_info.rip6_plen;
1764 } else {
1765 trace(1, "\tunsupported af: (gw=%d)\n", sgw->sin6_family);
1766 return -1;
1767 }
1768
1769 trace(1, "\tdeleting %s/%d ", inet6_n2p(dst), prefix);
1770 trace(1, "gw %s\n", inet6_n2p(gw));
1771 t_lifetime = time(NULL) - RIP_LIFETIME;
1772 /* age route for interface address */
1773 memset(&ni6, 0, sizeof(ni6));
1774 ni6.rip6_dest = *dst;
1775 ni6.rip6_plen = prefix;
1776 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/
1777 trace(1, "\tfind route %s/%d\n", inet6_n2p(&ni6.rip6_dest),
1778 ni6.rip6_plen);
1779 if (!rrt && (rrt = rtsearch(&ni6, NULL)) == NULL) {
1780 trace(1, "\tno route found\n");
1781 return -1;
1782 }
1783 #if 0
1784 if ((rrt->rrt_flags & RTF_STATIC) == 0) {
1785 trace(1, "\tyou can delete static routes only\n");
1786 } else
1787 #endif
1788 if (!IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, gw)) {
1789 trace(1, "\tgw mismatch: %s <-> ",
1790 inet6_n2p(&rrt->rrt_gw));
1791 trace(1, "%s\n", inet6_n2p(gw));
1792 } else {
1793 trace(1, "\troute found, age it\n");
1794 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
1795 rrt->rrt_t = t_lifetime;
1796 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
1797 }
1798 }
1799 return 0;
1800 }
1801
1802 /*
1803 * remove specified address from internal interface/routing table.
1804 */
1805 int
1806 rt_deladdr(struct ifc *ifcp, const struct sockaddr_in6 *sifa,
1807 const struct sockaddr_in6 *smask)
1808 {
1809 const struct in6_addr *addr = NULL;
1810 int prefix;
1811 struct ifac *ifa = NULL;
1812 struct netinfo6 ni6;
1813 struct riprt *rrt = NULL;
1814 time_t t_lifetime;
1815 int updated = 0;
1816
1817 if (sifa->sin6_family != AF_INET6) {
1818 trace(1, "\tother AF, ignored\n");
1819 return -1;
1820 }
1821 addr = &sifa->sin6_addr;
1822 prefix = sin6mask2len(smask);
1823
1824 trace(1, "\tdeleting %s/%d from %s\n",
1825 inet6_n2p(addr), prefix, ifcp->ifc_name);
1826 ifa = ifa_match(ifcp, addr, prefix);
1827 if (!ifa) {
1828 trace(1, "\tno matching ifa found for %s/%d on %s\n",
1829 inet6_n2p(addr), prefix, ifcp->ifc_name);
1830 return -1;
1831 }
1832 if (ifa->ifa_conf != ifcp) {
1833 trace(1, "\taddress table corrupt: back pointer does not match "
1834 "(%s != %s)\n",
1835 ifcp->ifc_name, ifa->ifa_conf->ifc_name);
1836 return -1;
1837 }
1838 /* remove ifa from interface */
1839 if (ifcp->ifc_addr == ifa)
1840 ifcp->ifc_addr = ifa->ifa_next;
1841 else {
1842 struct ifac *p;
1843 for (p = ifcp->ifc_addr; p; p = p->ifa_next) {
1844 if (p->ifa_next == ifa) {
1845 p->ifa_next = ifa->ifa_next;
1846 break;
1847 }
1848 }
1849 }
1850 ifa->ifa_next = NULL;
1851 ifa->ifa_conf = NULL;
1852 t_lifetime = time(NULL) - RIP_LIFETIME;
1853 /* age route for interface address */
1854 memset(&ni6, 0, sizeof(ni6));
1855 ni6.rip6_dest = ifa->ifa_addr;
1856 ni6.rip6_plen = ifa->ifa_plen;
1857 applyplen(&ni6.rip6_dest, ni6.rip6_plen);
1858 trace(1, "\tfind interface route %s/%d on %d\n",
1859 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen, ifcp->ifc_index);
1860 if ((rrt = rtsearch(&ni6, NULL)) != NULL) {
1861 struct in6_addr none;
1862 memset(&none, 0, sizeof(none));
1863 if (rrt->rrt_index == ifcp->ifc_index &&
1864 (IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &none) ||
1865 IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw))) {
1866 trace(1, "\troute found, age it\n");
1867 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
1868 rrt->rrt_t = t_lifetime;
1869 rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
1870 }
1871 updated++;
1872 } else {
1873 trace(1, "\tnon-interface route found: %s/%d on %d\n",
1874 inet6_n2p(&rrt->rrt_info.rip6_dest),
1875 rrt->rrt_info.rip6_plen,
1876 rrt->rrt_index);
1877 }
1878 } else
1879 trace(1, "\tno interface route found\n");
1880 /* age route for p2p destination */
1881 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
1882 memset(&ni6, 0, sizeof(ni6));
1883 ni6.rip6_dest = ifa->ifa_raddr;
1884 ni6.rip6_plen = 128;
1885 applyplen(&ni6.rip6_dest, ni6.rip6_plen); /*to be sure*/
1886 trace(1, "\tfind p2p route %s/%d on %d\n",
1887 inet6_n2p(&ni6.rip6_dest), ni6.rip6_plen,
1888 ifcp->ifc_index);
1889 if ((rrt = rtsearch(&ni6, NULL)) != NULL) {
1890 if (rrt->rrt_index == ifcp->ifc_index &&
1891 IN6_ARE_ADDR_EQUAL(&rrt->rrt_gw, &ifa->ifa_addr)) {
1892 trace(1, "\troute found, age it\n");
1893 if (rrt->rrt_t == 0 || rrt->rrt_t > t_lifetime) {
1894 rrt->rrt_t = t_lifetime;
1895 rrt->rrt_info.rip6_metric =
1896 HOPCNT_INFINITY6;
1897 updated++;
1898 }
1899 } else {
1900 trace(1, "\tnon-p2p route found: %s/%d on %d\n",
1901 inet6_n2p(&rrt->rrt_info.rip6_dest),
1902 rrt->rrt_info.rip6_plen,
1903 rrt->rrt_index);
1904 }
1905 } else
1906 trace(1, "\tno p2p route found\n");
1907 }
1908 return updated ? 0 : -1;
1909 }
1910
1911 /*
1912 * Get each interface address and put those interface routes to the route
1913 * list.
1914 */
1915 int
1916 ifrt(struct ifc *ifcp, int again)
1917 {
1918 struct ifac *ifa;
1919 struct riprt *rrt, *search_rrt, *prev_rrt, *loop_rrt;
1920 struct netinfo6 *np;
1921 time_t t_lifetime;
1922 int need_trigger = 0;
1923
1924 if (ifcp->ifc_flags & IFF_LOOPBACK)
1925 return 0; /* ignore loopback */
1926 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
1927 ifrt_p2p(ifcp, again);
1928 return 0;
1929 }
1930
1931 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) {
1932 if (IN6_IS_ADDR_LINKLOCAL(&ifa->ifa_addr)) {
1933 #if 0
1934 trace(1, "route: %s on %s: "
1935 "skip linklocal interface address\n",
1936 inet6_n2p(&ifa->ifa_addr), ifcp->ifc_name);
1937 #endif
1938 continue;
1939 }
1940 if (IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_addr)) {
1941 #if 0
1942 trace(1, "route: %s: skip unspec interface address\n",
1943 ifcp->ifc_name);
1944 #endif
1945 continue;
1946 }
1947 if (ifcp->ifc_flags & IFF_UP) {
1948 if ((rrt = MALLOC(struct riprt)) == NULL)
1949 fatal("malloc: struct riprt");
1950 memset(rrt, 0, sizeof(*rrt));
1951 rrt->rrt_same = NULL;
1952 rrt->rrt_index = ifcp->ifc_index;
1953 rrt->rrt_t = 0; /* don't age */
1954 rrt->rrt_info.rip6_dest = ifa->ifa_addr;
1955 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
1956 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric;
1957 rrt->rrt_info.rip6_plen = ifa->ifa_plen;
1958 rrt->rrt_flags = RTF_CLONING;
1959 rrt->rrt_rflags |= RRTF_CHANGED;
1960 applyplen(&rrt->rrt_info.rip6_dest, ifa->ifa_plen);
1961 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
1962 #if 0
1963 /* XXX why gateway address == network adddress? */
1964 rrt->rrt_gw = ifa->ifa_addr;
1965 #endif
1966 np = &rrt->rrt_info;
1967 search_rrt = rtsearch(np, &prev_rrt);
1968 if (search_rrt != NULL) {
1969 if (search_rrt->rrt_info.rip6_metric >
1970 rrt->rrt_info.rip6_metric) {
1971 if (prev_rrt)
1972 prev_rrt->rrt_next = rrt->rrt_next;
1973 else
1974 riprt = rrt->rrt_next;
1975 delroute(&rrt->rrt_info, &rrt->rrt_gw);
1976 free(rrt);
1977 } else {
1978 /* Already have better route */
1979 if (!again) {
1980 trace(1, "route: %s/%d: "
1981 "already registered (%s)\n",
1982 inet6_n2p(&np->rip6_dest), np->rip6_plen,
1983 ifcp->ifc_name);
1984 }
1985 free(rrt);
1986 continue;
1987 }
1988 }
1989 /* Attach the route to the list */
1990 trace(1, "route: %s/%d: register route (%s)\n",
1991 inet6_n2p(&np->rip6_dest), np->rip6_plen,
1992 ifcp->ifc_name);
1993 rrt->rrt_next = riprt;
1994 riprt = rrt;
1995 addroute(rrt, &rrt->rrt_gw, ifcp);
1996 sendrequest(ifcp);
1997 ripsend(ifcp, &ifcp->ifc_ripsin, 0);
1998 need_trigger = 1;
1999 } else {
2000 for (loop_rrt = riprt; loop_rrt; loop_rrt = loop_rrt->rrt_next) {
2001 if (loop_rrt->rrt_index == ifcp->ifc_index) {
2002 t_lifetime = time(NULL) - RIP_LIFETIME;
2003 if (loop_rrt->rrt_t == 0 || loop_rrt->rrt_t > t_lifetime) {
2004 loop_rrt->rrt_t = t_lifetime;
2005 loop_rrt->rrt_info.rip6_metric = HOPCNT_INFINITY6;
2006 loop_rrt->rrt_rflags |= RRTF_CHANGED;
2007 need_trigger = 1;
2008 }
2009 }
2010 }
2011 }
2012 }
2013 return need_trigger;
2014 }
2015
2016 /*
2017 * there are couple of p2p interface routing models. "behavior" lets
2018 * you pick one. it looks that gated behavior fits best with BSDs,
2019 * since BSD kernels does not look at prefix length on p2p interfaces.
2020 */
2021 void
2022 ifrt_p2p(struct ifc *ifcp, int again)
2023 {
2024 struct ifac *ifa;
2025 struct riprt *rrt, *orrt, *prevrrt;
2026 struct netinfo6 *np;
2027 struct in6_addr addr, dest;
2028 int advert, ignore, i;
2029 #define P2PADVERT_NETWORK 1
2030 #define P2PADVERT_ADDR 2
2031 #define P2PADVERT_DEST 4
2032 #define P2PADVERT_MAX 4
2033 const enum { CISCO, GATED, ROUTE6D } behavior = GATED;
2034 const char *category = "";
2035 const char *noadv;
2036
2037 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) {
2038 addr = ifa->ifa_addr;
2039 dest = ifa->ifa_raddr;
2040 applyplen(&addr, ifa->ifa_plen);
2041 applyplen(&dest, ifa->ifa_plen);
2042 advert = ignore = 0;
2043 switch (behavior) {
2044 case CISCO:
2045 /*
2046 * honor addr/plen, just like normal shared medium
2047 * interface. this may cause trouble if you reuse
2048 * addr/plen on other interfaces.
2049 *
2050 * advertise addr/plen.
2051 */
2052 advert |= P2PADVERT_NETWORK;
2053 break;
2054 case GATED:
2055 /*
2056 * prefixlen on p2p interface is meaningless.
2057 * advertise addr/128 and dest/128.
2058 *
2059 * do not install network route to route6d routing
2060 * table (if we do, it would prevent route installation
2061 * for other p2p interface that shares addr/plen).
2062 *
2063 * XXX what should we do if dest is ::? it will not
2064 * get announced anyways (see following filter),
2065 * but we need to think.
2066 */
2067 advert |= P2PADVERT_ADDR;
2068 advert |= P2PADVERT_DEST;
2069 ignore |= P2PADVERT_NETWORK;
2070 break;
2071 case ROUTE6D:
2072 /*
2073 * just for testing. actually the code is redundant
2074 * given the current p2p interface address assignment
2075 * rule for kame kernel.
2076 *
2077 * intent:
2078 * A/n -> announce A/n
2079 * A B/n, A and B share prefix -> A/n (= B/n)
2080 * A B/n, do not share prefix -> A/128 and B/128
2081 * actually, A/64 and A B/128 are the only cases
2082 * permitted by the kernel:
2083 * A/64 -> A/64
2084 * A B/128 -> A/128 and B/128
2085 */
2086 if (!IN6_IS_ADDR_UNSPECIFIED(&ifa->ifa_raddr)) {
2087 if (IN6_ARE_ADDR_EQUAL(&addr, &dest))
2088 advert |= P2PADVERT_NETWORK;
2089 else {
2090 advert |= P2PADVERT_ADDR;
2091 advert |= P2PADVERT_DEST;
2092 ignore |= P2PADVERT_NETWORK;
2093 }
2094 } else
2095 advert |= P2PADVERT_NETWORK;
2096 break;
2097 }
2098
2099 for (i = 1; i <= P2PADVERT_MAX; i *= 2) {
2100 if ((ignore & i) != 0)
2101 continue;
2102 if ((rrt = MALLOC(struct riprt)) == NULL) {
2103 fatal("malloc: struct riprt");
2104 /*NOTREACHED*/
2105 }
2106 memset(rrt, 0, sizeof(*rrt));
2107 rrt->rrt_same = NULL;
2108 rrt->rrt_index = ifcp->ifc_index;
2109 rrt->rrt_t = 0; /* don't age */
2110 switch (i) {
2111 case P2PADVERT_NETWORK:
2112 rrt->rrt_info.rip6_dest = ifa->ifa_addr;
2113 rrt->rrt_info.rip6_plen = ifa->ifa_plen;
2114 applyplen(&rrt->rrt_info.rip6_dest,
2115 ifa->ifa_plen);
2116 category = "network";
2117 break;
2118 case P2PADVERT_ADDR:
2119 rrt->rrt_info.rip6_dest = ifa->ifa_addr;
2120 rrt->rrt_info.rip6_plen = 128;
2121 rrt->rrt_gw = in6addr_loopback;
2122 category = "addr";
2123 break;
2124 case P2PADVERT_DEST:
2125 rrt->rrt_info.rip6_dest = ifa->ifa_raddr;
2126 rrt->rrt_info.rip6_plen = 128;
2127 rrt->rrt_gw = ifa->ifa_addr;
2128 category = "dest";
2129 break;
2130 }
2131 if (IN6_IS_ADDR_UNSPECIFIED(&rrt->rrt_info.rip6_dest) ||
2132 IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_info.rip6_dest)) {
2133 #if 0
2134 trace(1, "route: %s: skip unspec/linklocal "
2135 "(%s on %s)\n", category, ifcp->ifc_name);
2136 #endif
2137 free(rrt);
2138 continue;
2139 }
2140 if ((advert & i) == 0) {
2141 rrt->rrt_rflags |= RRTF_NOADVERTISE;
2142 noadv = ", NO-ADV";
2143 } else
2144 noadv = "";
2145 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
2146 rrt->rrt_info.rip6_metric = 1 + ifcp->ifc_metric;
2147 np = &rrt->rrt_info;
2148 orrt = rtsearch(np, &prevrrt);
2149 if (!orrt) {
2150 /* Attach the route to the list */
2151 trace(1, "route: %s/%d: register route "
2152 "(%s on %s%s)\n",
2153 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2154 category, ifcp->ifc_name, noadv);
2155 rrt->rrt_next = riprt;
2156 riprt = rrt;
2157 } else if (rrt->rrt_index != orrt->rrt_index ||
2158 rrt->rrt_info.rip6_metric != orrt->rrt_info.rip6_metric) {
2159 /* swap route */
2160 rrt->rrt_next = orrt->rrt_next;
2161 if (prevrrt)
2162 prevrrt->rrt_next = rrt;
2163 else
2164 riprt = rrt;
2165 free(orrt);
2166
2167 trace(1, "route: %s/%d: update (%s on %s%s)\n",
2168 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2169 category, ifcp->ifc_name, noadv);
2170 } else {
2171 /* Already found */
2172 if (!again) {
2173 trace(1, "route: %s/%d: "
2174 "already registered (%s on %s%s)\n",
2175 inet6_n2p(&np->rip6_dest),
2176 np->rip6_plen, category,
2177 ifcp->ifc_name, noadv);
2178 }
2179 free(rrt);
2180 }
2181 }
2182 }
2183 #undef P2PADVERT_NETWORK
2184 #undef P2PADVERT_ADDR
2185 #undef P2PADVERT_DEST
2186 #undef P2PADVERT_MAX
2187 }
2188
2189 int
2190 getifmtu(int ifindex)
2191 {
2192 int mib[6];
2193 char *buf;
2194 size_t msize;
2195 struct if_msghdr *ifm;
2196 int mtu;
2197
2198 mib[0] = CTL_NET;
2199 mib[1] = PF_ROUTE;
2200 mib[2] = 0;
2201 mib[3] = AF_INET6;
2202 mib[4] = NET_RT_IFLIST;
2203 mib[5] = ifindex;
2204 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) {
2205 fatal("sysctl estimate NET_RT_IFLIST");
2206 /*NOTREACHED*/
2207 }
2208 if ((buf = malloc(msize)) == NULL) {
2209 fatal("malloc");
2210 /*NOTREACHED*/
2211 }
2212 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) {
2213 fatal("sysctl NET_RT_IFLIST");
2214 /*NOTREACHED*/
2215 }
2216 ifm = (struct if_msghdr *)buf;
2217 mtu = ifm->ifm_data.ifi_mtu;
2218 #ifdef __DragonFly__
2219 if (ifindex != ifm->ifm_index) {
2220 fatal("ifindex does not match with ifm_index");
2221 /*NOTREACHED*/
2222 }
2223 #endif
2224 free(buf);
2225 return mtu;
2226 }
2227
2228 const char *
2229 rttypes(struct rt_msghdr *rtm)
2230 {
2231 #define RTTYPE(s, f) \
2232 do { \
2233 if (rtm->rtm_type == (f)) \
2234 return (s); \
2235 } while (0)
2236 RTTYPE("ADD", RTM_ADD);
2237 RTTYPE("DELETE", RTM_DELETE);
2238 RTTYPE("CHANGE", RTM_CHANGE);
2239 RTTYPE("GET", RTM_GET);
2240 RTTYPE("LOSING", RTM_LOSING);
2241 RTTYPE("REDIRECT", RTM_REDIRECT);
2242 RTTYPE("MISS", RTM_MISS);
2243 RTTYPE("LOCK", RTM_LOCK);
2244 RTTYPE("OLDADD", RTM_OLDADD);
2245 RTTYPE("OLDDEL", RTM_OLDDEL);
2246 RTTYPE("RESOLVE", RTM_RESOLVE);
2247 RTTYPE("NEWADDR", RTM_NEWADDR);
2248 RTTYPE("DELADDR", RTM_DELADDR);
2249 RTTYPE("IFINFO", RTM_IFINFO);
2250 #ifdef RTM_OLDADD
2251 RTTYPE("OLDADD", RTM_OLDADD);
2252 #endif
2253 #ifdef RTM_OLDDEL
2254 RTTYPE("OLDDEL", RTM_OLDDEL);
2255 #endif
2256 #ifdef RTM_OIFINFO
2257 RTTYPE("OIFINFO", RTM_OIFINFO);
2258 #endif
2259 #ifdef RTM_IFANNOUNCE
2260 RTTYPE("IFANNOUNCE", RTM_IFANNOUNCE);
2261 #endif
2262 #ifdef RTM_NEWMADDR
2263 RTTYPE("NEWMADDR", RTM_NEWMADDR);
2264 #endif
2265 #ifdef RTM_DELMADDR
2266 RTTYPE("DELMADDR", RTM_DELMADDR);
2267 #endif
2268 #undef RTTYPE
2269 return NULL;
2270 }
2271
2272 const char *
2273 rtflags(struct rt_msghdr *rtm)
2274 {
2275 static char buf[BUFSIZ];
2276
2277 /*
2278 * letter conflict should be okay. painful when *BSD diverges...
2279 */
2280 strlcpy(buf, "", sizeof(buf));
2281 #define RTFLAG(s, f) \
2282 do { \
2283 if (rtm->rtm_flags & (f)) \
2284 strlcat(buf, (s), sizeof(buf)); \
2285 } while (0)
2286 RTFLAG("U", RTF_UP);
2287 RTFLAG("G", RTF_GATEWAY);
2288 RTFLAG("H", RTF_HOST);
2289 RTFLAG("R", RTF_REJECT);
2290 RTFLAG("D", RTF_DYNAMIC);
2291 RTFLAG("M", RTF_MODIFIED);
2292 RTFLAG("d", RTF_DONE);
2293 #ifdef RTF_MASK
2294 RTFLAG("m", RTF_MASK);
2295 #endif
2296 RTFLAG("C", RTF_CLONING);
2297 #ifdef RTF_CLONED
2298 RTFLAG("c", RTF_CLONED);
2299 #endif
2300 #ifdef RTF_PRCLONING
2301 RTFLAG("c", RTF_PRCLONING);
2302 #endif
2303 #ifdef RTF_WASCLONED
2304 RTFLAG("W", RTF_WASCLONED);
2305 #endif
2306 RTFLAG("X", RTF_XRESOLVE);
2307 RTFLAG("L", RTF_LLINFO);
2308 RTFLAG("S", RTF_STATIC);
2309 RTFLAG("B", RTF_BLACKHOLE);
2310 #ifdef RTF_PROTO3
2311 RTFLAG("3", RTF_PROTO3);
2312 #endif
2313 RTFLAG("2", RTF_PROTO2);
2314 RTFLAG("1", RTF_PROTO1);
2315 #ifdef RTF_BROADCAST
2316 RTFLAG("b", RTF_BROADCAST);
2317 #endif
2318 #ifdef RTF_DEFAULT
2319 RTFLAG("d", RTF_DEFAULT);
2320 #endif
2321 #ifdef RTF_ISAROUTER
2322 RTFLAG("r", RTF_ISAROUTER);
2323 #endif
2324 #ifdef RTF_TUNNEL
2325 RTFLAG("T", RTF_TUNNEL);
2326 #endif
2327 #ifdef RTF_AUTH
2328 RTFLAG("A", RTF_AUTH);
2329 #endif
2330 #ifdef RTF_CRYPT
2331 RTFLAG("E", RTF_CRYPT);
2332 #endif
2333 #undef RTFLAG
2334 return buf;
2335 }
2336
2337 const char *
2338 ifflags(int flags)
2339 {
2340 static char buf[BUFSIZ];
2341
2342 strlcpy(buf, "", sizeof(buf));
2343 #define IFFLAG(s, f) \
2344 do { \
2345 if (flags & f) { \
2346 if (buf[0]) \
2347 strlcat(buf, ",", sizeof(buf)); \
2348 strlcat(buf, s, sizeof(buf)); \
2349 } \
2350 } while (0)
2351 IFFLAG("UP", IFF_UP);
2352 IFFLAG("BROADCAST", IFF_BROADCAST);
2353 IFFLAG("DEBUG", IFF_DEBUG);
2354 IFFLAG("LOOPBACK", IFF_LOOPBACK);
2355 IFFLAG("POINTOPOINT", IFF_POINTOPOINT);
2356 #ifdef IFF_NOTRAILERS
2357 IFFLAG("NOTRAILERS", IFF_NOTRAILERS);
2358 #endif
2359 #ifdef IFF_SMART
2360 IFFLAG("SMART", IFF_SMART);
2361 #endif
2362 IFFLAG("RUNNING", IFF_RUNNING);
2363 IFFLAG("NOARP", IFF_NOARP);
2364 IFFLAG("PROMISC", IFF_PROMISC);
2365 IFFLAG("ALLMULTI", IFF_ALLMULTI);
2366 IFFLAG("OACTIVE", IFF_OACTIVE);
2367 IFFLAG("SIMPLEX", IFF_SIMPLEX);
2368 IFFLAG("LINK0", IFF_LINK0);
2369 IFFLAG("LINK1", IFF_LINK1);
2370 IFFLAG("LINK2", IFF_LINK2);
2371 IFFLAG("MULTICAST", IFF_MULTICAST);
2372 #undef IFFLAG
2373 return buf;
2374 }
2375
2376 void
2377 krtread(int again)
2378 {
2379 int mib[6];
2380 size_t msize;
2381 char *buf, *p, *lim;
2382 struct rt_msghdr *rtm;
2383 int retry;
2384 const char *errmsg;
2385
2386 retry = 0;
2387 buf = NULL;
2388 mib[0] = CTL_NET;
2389 mib[1] = PF_ROUTE;
2390 mib[2] = 0;
2391 mib[3] = AF_INET6; /* Address family */
2392 mib[4] = NET_RT_DUMP; /* Dump the kernel routing table */
2393 mib[5] = 0; /* No flags */
2394 do {
2395 retry++;
2396 errmsg = NULL;
2397 if (buf)
2398 free(buf);
2399 if (sysctl(mib, 6, NULL, &msize, NULL, 0) < 0) {
2400 errmsg = "sysctl estimate";
2401 continue;
2402 }
2403 if ((buf = malloc(msize)) == NULL) {
2404 errmsg = "malloc";
2405 continue;
2406 }
2407 if (sysctl(mib, 6, buf, &msize, NULL, 0) < 0) {
2408 errmsg = "sysctl NET_RT_DUMP";
2409 continue;
2410 }
2411 } while (retry < 5 && errmsg != NULL);
2412 if (errmsg) {
2413 fatal("%s (with %d retries, msize=%lu)", errmsg, retry,
2414 (u_long)msize);
2415 /*NOTREACHED*/
2416 } else if (1 < retry)
2417 syslog(LOG_INFO, "NET_RT_DUMP %d retires", retry);
2418
2419 lim = buf + msize;
2420 for (p = buf; p < lim; p += rtm->rtm_msglen) {
2421 rtm = (struct rt_msghdr *)p;
2422 rt_entry(rtm, again);
2423 }
2424 free(buf);
2425 }
2426
2427 void
2428 rt_entry(struct rt_msghdr *rtm, int again)
2429 {
2430 struct sockaddr_in6 *sin6_dst, *sin6_gw, *sin6_mask;
2431 struct sockaddr_in6 *sin6_genmask, *sin6_ifp;
2432 char *rtmp, *ifname = NULL;
2433 struct riprt *rrt, *orrt;
2434 struct netinfo6 *np;
2435 int s;
2436
2437 sin6_dst = sin6_gw = sin6_mask = sin6_genmask = sin6_ifp = NULL;
2438 if ((rtm->rtm_flags & RTF_UP) == 0 || rtm->rtm_flags &
2439 (RTF_CLONING|RTF_XRESOLVE|RTF_LLINFO|RTF_BLACKHOLE)) {
2440 return; /* not interested in the link route */
2441 }
2442 /* do not look at cloned routes */
2443 #ifdef RTF_WASCLONED
2444 if (rtm->rtm_flags & RTF_WASCLONED)
2445 return;
2446 #endif
2447 #ifdef RTF_CLONED
2448 if (rtm->rtm_flags & RTF_CLONED)
2449 return;
2450 #endif
2451 /*
2452 * do not look at dynamic routes.
2453 * netbsd/openbsd cloned routes have UGHD.
2454 */
2455 if (rtm->rtm_flags & RTF_DYNAMIC)
2456 return;
2457 rtmp = (char *)(rtm + 1);
2458 /* Destination */
2459 if ((rtm->rtm_addrs & RTA_DST) == 0)
2460 return; /* ignore routes without destination address */
2461 sin6_dst = (struct sockaddr_in6 *)rtmp;
2462 rtmp += RT_ROUNDUP(sin6_dst->sin6_len);
2463 if (rtm->rtm_addrs & RTA_GATEWAY) {
2464 sin6_gw = (struct sockaddr_in6 *)rtmp;
2465 rtmp += RT_ROUNDUP(sin6_gw->sin6_len);
2466 }
2467 if (rtm->rtm_addrs & RTA_NETMASK) {
2468 sin6_mask = (struct sockaddr_in6 *)rtmp;
2469 rtmp += RT_ROUNDUP(sin6_mask->sin6_len);
2470 }
2471 if (rtm->rtm_addrs & RTA_GENMASK) {
2472 sin6_genmask = (struct sockaddr_in6 *)rtmp;
2473 rtmp += RT_ROUNDUP(sin6_genmask->sin6_len);
2474 }
2475 if (rtm->rtm_addrs & RTA_IFP) {
2476 sin6_ifp = (struct sockaddr_in6 *)rtmp;
2477 rtmp += RT_ROUNDUP(sin6_ifp->sin6_len);
2478 }
2479
2480 /* Destination */
2481 if (sin6_dst->sin6_family != AF_INET6)
2482 return;
2483 if (IN6_IS_ADDR_LINKLOCAL(&sin6_dst->sin6_addr))
2484 return; /* Link-local */
2485 if (IN6_ARE_ADDR_EQUAL(&sin6_dst->sin6_addr, &in6addr_loopback))
2486 return; /* Loopback */
2487 if (IN6_IS_ADDR_MULTICAST(&sin6_dst->sin6_addr))
2488 return;
2489
2490 if ((rrt = MALLOC(struct riprt)) == NULL) {
2491 fatal("malloc: struct riprt");
2492 /*NOTREACHED*/
2493 }
2494 memset(rrt, 0, sizeof(*rrt));
2495 np = &rrt->rrt_info;
2496 rrt->rrt_same = NULL;
2497 rrt->rrt_t = time(NULL);
2498 if (aflag == 0 && (rtm->rtm_flags & RTF_STATIC))
2499 rrt->rrt_t = 0; /* Don't age static routes */
2500 #if 0
2501 np->rip6_tag = htons(routetag & 0xffff);
2502 #else
2503 np->rip6_tag = 0;
2504 #endif
2505 np->rip6_metric = rtm->rtm_rmx.rmx_hopcount;
2506 if (np->rip6_metric < 1)
2507 np->rip6_metric = 1;
2508 rrt->rrt_flags = rtm->rtm_flags;
2509 np->rip6_dest = sin6_dst->sin6_addr;
2510
2511 /* Mask or plen */
2512 if (rtm->rtm_flags & RTF_HOST)
2513 np->rip6_plen = 128; /* Host route */
2514 else if (sin6_mask)
2515 np->rip6_plen = sin6mask2len(sin6_mask);
2516 else
2517 np->rip6_plen = 0;
2518
2519 orrt = rtsearch(np, NULL);
2520 if (orrt && orrt->rrt_info.rip6_metric != HOPCNT_INFINITY6) {
2521 /* Already found */
2522 if (!again) {
2523 trace(1, "route: %s/%d flags %s: already registered\n",
2524 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2525 rtflags(rtm));
2526 }
2527 free(rrt);
2528 return;
2529 }
2530 /* Gateway */
2531 if (!sin6_gw)
2532 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
2533 else {
2534 if (sin6_gw->sin6_family == AF_INET6)
2535 rrt->rrt_gw = sin6_gw->sin6_addr;
2536 else if (sin6_gw->sin6_family == AF_LINK) {
2537 /* XXX in case ppp link? */
2538 rrt->rrt_gw = in6addr_loopback;
2539 } else
2540 memset(&rrt->rrt_gw, 0, sizeof(struct in6_addr));
2541 }
2542 trace(1, "route: %s/%d flags %s",
2543 inet6_n2p(&np->rip6_dest), np->rip6_plen, rtflags(rtm));
2544 trace(1, " gw %s", inet6_n2p(&rrt->rrt_gw));
2545
2546 /* Interface */
2547 s = rtm->rtm_index;
2548 if (s < nindex2ifc && index2ifc[s])
2549 ifname = index2ifc[s]->ifc_name;
2550 else {
2551 trace(1, " not configured\n");
2552 free(rrt);
2553 return;
2554 }
2555 trace(1, " if %s sock %d", ifname, s);
2556 rrt->rrt_index = s;
2557
2558 trace(1, "\n");
2559
2560 /* Check gateway */
2561 if (!IN6_IS_ADDR_LINKLOCAL(&rrt->rrt_gw) &&
2562 !IN6_IS_ADDR_LOOPBACK(&rrt->rrt_gw)
2563 #ifdef __DragonFly__
2564 && (rrt->rrt_flags & RTF_LOCAL) == 0
2565 #endif
2566 ) {
2567 trace(0, "***** Gateway %s is not a link-local address.\n",
2568 inet6_n2p(&rrt->rrt_gw));
2569 trace(0, "***** dest(%s) if(%s) -- Not optimized.\n",
2570 inet6_n2p(&rrt->rrt_info.rip6_dest), ifname);
2571 rrt->rrt_rflags |= RRTF_NH_NOT_LLADDR;
2572 }
2573
2574 /* Put it to the route list */
2575 if (orrt && orrt->rrt_info.rip6_metric == HOPCNT_INFINITY6) {
2576 /* replace route list */
2577 rrt->rrt_next = orrt->rrt_next;
2578 *orrt = *rrt;
2579 trace(1, "route: %s/%d flags %s: replace new route\n",
2580 inet6_n2p(&np->rip6_dest), np->rip6_plen,
2581 rtflags(rtm));
2582 free(rrt);
2583 } else {
2584 rrt->rrt_next = riprt;
2585 riprt = rrt;
2586 }
2587 }
2588
2589 int
2590 addroute(struct riprt *rrt, const struct in6_addr *gw, struct ifc *ifcp)
2591 {
2592 struct netinfo6 *np;
2593 u_char buf[BUFSIZ], buf1[BUFSIZ], buf2[BUFSIZ];
2594 struct rt_msghdr *rtm;
2595 struct sockaddr_in6 *sin;
2596 int len;
2597
2598 np = &rrt->rrt_info;
2599 inet_ntop(AF_INET6, (const void *)gw, (char *)buf1, sizeof(buf1));
2600 inet_ntop(AF_INET6, (void *)&ifcp->ifc_mylladdr, (char *)buf2, sizeof(buf2));
2601 tracet(1, "ADD: %s/%d gw %s [%d] ifa %s\n",
2602 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1,
2603 np->rip6_metric - 1, buf2);
2604 if (rtlog)
2605 fprintf(rtlog, "%s: ADD: %s/%d gw %s [%d] ifa %s\n", hms(),
2606 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1,
2607 np->rip6_metric - 1, buf2);
2608 if (nflag)
2609 return 0;
2610
2611 memset(buf, 0, sizeof(buf));
2612 rtm = (struct rt_msghdr *)buf;
2613 rtm->rtm_type = RTM_ADD;
2614 rtm->rtm_version = RTM_VERSION;
2615 rtm->rtm_seq = ++seq;
2616 rtm->rtm_pid = pid;
2617 rtm->rtm_flags = rrt->rrt_flags;
2618 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
2619 rtm->rtm_rmx.rmx_hopcount = np->rip6_metric - 1;
2620 rtm->rtm_inits = RTV_HOPCOUNT;
2621 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2622 /* Destination */
2623 sin->sin6_len = sizeof(struct sockaddr_in6);
2624 sin->sin6_family = AF_INET6;
2625 sin->sin6_addr = np->rip6_dest;
2626 sin = (struct sockaddr_in6 *)((char *)sin + RT_ROUNDUP(sin->sin6_len));
2627 /* Gateway */
2628 sin->sin6_len = sizeof(struct sockaddr_in6);
2629 sin->sin6_family = AF_INET6;
2630 sin->sin6_addr = *gw;
2631 sin = (struct sockaddr_in6 *)((char *)sin + RT_ROUNDUP(sin->sin6_len));
2632 /* Netmask */
2633 sin->sin6_len = sizeof(struct sockaddr_in6);
2634 sin->sin6_family = AF_INET6;
2635 sin->sin6_addr = *(plen2mask(np->rip6_plen));
2636 sin = (struct sockaddr_in6 *)((char *)sin + RT_ROUNDUP(sin->sin6_len));
2637
2638 len = (char *)sin - (char *)buf;
2639 rtm->rtm_msglen = len;
2640 if (write(rtsock, buf, len) > 0)
2641 return 0;
2642
2643 if (errno == EEXIST) {
2644 trace(0, "ADD: Route already exists %s/%d gw %s\n",
2645 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1);
2646 if (rtlog)
2647 fprintf(rtlog, "ADD: Route already exists %s/%d gw %s\n",
2648 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf1);
2649 } else {
2650 trace(0, "Can not write to rtsock (addroute): %s\n",
2651 strerror(errno));
2652 if (rtlog)
2653 fprintf(rtlog, "\tCan not write to rtsock: %s\n",
2654 strerror(errno));
2655 }
2656 return -1;
2657 }
2658
2659 int
2660 delroute(struct netinfo6 *np, struct in6_addr *gw)
2661 {
2662 u_char buf[BUFSIZ], buf2[BUFSIZ];
2663 struct rt_msghdr *rtm;
2664 struct sockaddr_in6 *sin;
2665 int len;
2666
2667 inet_ntop(AF_INET6, (void *)gw, (char *)buf2, sizeof(buf2));
2668 tracet(1, "DEL: %s/%d gw %s\n", inet6_n2p(&np->rip6_dest),
2669 np->rip6_plen, buf2);
2670 if (rtlog)
2671 fprintf(rtlog, "%s: DEL: %s/%d gw %s\n",
2672 hms(), inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
2673 if (nflag)
2674 return 0;
2675
2676 memset(buf, 0, sizeof(buf));
2677 rtm = (struct rt_msghdr *)buf;
2678 rtm->rtm_type = RTM_DELETE;
2679 rtm->rtm_version = RTM_VERSION;
2680 rtm->rtm_seq = ++seq;
2681 rtm->rtm_pid = pid;
2682 rtm->rtm_flags = RTF_UP | RTF_GATEWAY;
2683 if (np->rip6_plen == sizeof(struct in6_addr) * 8)
2684 rtm->rtm_flags |= RTF_HOST;
2685 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
2686 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2687 /* Destination */
2688 sin->sin6_len = sizeof(struct sockaddr_in6);
2689 sin->sin6_family = AF_INET6;
2690 sin->sin6_addr = np->rip6_dest;
2691 sin = (struct sockaddr_in6 *)((char *)sin + RT_ROUNDUP(sin->sin6_len));
2692 /* Gateway */
2693 sin->sin6_len = sizeof(struct sockaddr_in6);
2694 sin->sin6_family = AF_INET6;
2695 sin->sin6_addr = *gw;
2696 sin = (struct sockaddr_in6 *)((char *)sin + RT_ROUNDUP(sin->sin6_len));
2697 /* Netmask */
2698 sin->sin6_len = sizeof(struct sockaddr_in6);
2699 sin->sin6_family = AF_INET6;
2700 sin->sin6_addr = *(plen2mask(np->rip6_plen));
2701 sin = (struct sockaddr_in6 *)((char *)sin + RT_ROUNDUP(sin->sin6_len));
2702
2703 len = (char *)sin - (char *)buf;
2704 rtm->rtm_msglen = len;
2705 if (write(rtsock, buf, len) >= 0)
2706 return 0;
2707
2708 if (errno == ESRCH) {
2709 trace(0, "RTDEL: Route does not exist: %s/%d gw %s\n",
2710 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
2711 if (rtlog)
2712 fprintf(rtlog, "RTDEL: Route does not exist: %s/%d gw %s\n",
2713 inet6_n2p(&np->rip6_dest), np->rip6_plen, buf2);
2714 } else {
2715 trace(0, "Can not write to rtsock (delroute): %s\n",
2716 strerror(errno));
2717 if (rtlog)
2718 fprintf(rtlog, "\tCan not write to rtsock: %s\n",
2719 strerror(errno));
2720 }
2721 return -1;
2722 }
2723
2724 struct in6_addr *
2725 getroute(struct netinfo6 *np, struct in6_addr *gw)
2726 {
2727 u_char buf[BUFSIZ];
2728 u_long myseq;
2729 int len;
2730 struct rt_msghdr *rtm;
2731 struct sockaddr_in6 *sin;
2732
2733 rtm = (struct rt_msghdr *)buf;
2734 len = sizeof(struct rt_msghdr) + sizeof(struct sockaddr_in6);
2735 memset(rtm, 0, len);
2736 rtm->rtm_type = RTM_GET;
2737 rtm->rtm_version = RTM_VERSION;
2738 myseq = ++seq;
2739 rtm->rtm_seq = myseq;
2740 rtm->rtm_addrs = RTA_DST;
2741 rtm->rtm_msglen = len;
2742 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2743 sin->sin6_len = sizeof(struct sockaddr_in6);
2744 sin->sin6_family = AF_INET6;
2745 sin->sin6_addr = np->rip6_dest;
2746 if (write(rtsock, buf, len) < 0) {
2747 if (errno == ESRCH) /* No such route found */
2748 return NULL;
2749 perror("write to rtsock");
2750 exit(1);
2751 }
2752 do {
2753 if ((len = read(rtsock, buf, sizeof(buf))) < 0) {
2754 perror("read from rtsock");
2755 exit(1);
2756 }
2757 rtm = (struct rt_msghdr *)buf;
2758 } while (rtm->rtm_seq != myseq || rtm->rtm_pid != pid);
2759 sin = (struct sockaddr_in6 *)&buf[sizeof(struct rt_msghdr)];
2760 if (rtm->rtm_addrs & RTA_DST) {
2761 sin = (struct sockaddr_in6 *)
2762 ((char *)sin + RT_ROUNDUP(sin->sin6_len));
2763 }
2764 if (rtm->rtm_addrs & RTA_GATEWAY) {
2765 *gw = sin->sin6_addr;
2766 return gw;
2767 }
2768 return NULL;
2769 }
2770
2771 const char *
2772 inet6_n2p(const struct in6_addr *p)
2773 {
2774 static char buf[BUFSIZ];
2775
2776 return inet_ntop(AF_INET6, (const void *)p, buf, sizeof(buf));
2777 }
2778
2779 void
2780 ifrtdump(int sig)
2781 {
2782 ifdump(sig);
2783 rtdump(sig);
2784 }
2785
2786 void
2787 ifdump(int sig)
2788 {
2789 struct ifc *ifcp;
2790 FILE *dump;
2791 int i;
2792
2793 if (sig == 0)
2794 dump = stderr;
2795 else
2796 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL)
2797 dump = stderr;
2798
2799 fprintf(dump, "%s: Interface Table Dump\n", hms());
2800 fprintf(dump, " Number of interfaces: %d\n", nifc);
2801 for (i = 0; i < 2; i++) {
2802 fprintf(dump, " %sadvertising interfaces:\n", i ? "non-" : "");
2803 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) {
2804 if (i == 0) {
2805 if ((ifcp->ifc_flags & IFF_UP) == 0)
2806 continue;
2807 if (iff_find(ifcp, 'N') != NULL)
2808 continue;
2809 } else {
2810 if (ifcp->ifc_flags & IFF_UP)
2811 continue;
2812 }
2813 ifdump0(dump, ifcp);
2814 }
2815 }
2816 fprintf(dump, "\n");
2817 if (dump != stderr)
2818 fclose(dump);
2819 }
2820
2821 void
2822 ifdump0(FILE *dump, const struct ifc *ifcp)
2823 {
2824 struct ifac *ifa;
2825 struct iff *iffp;
2826 char buf[BUFSIZ];
2827 const char *ft;
2828 int addr;
2829
2830 fprintf(dump, " %s: index(%d) flags(%s) addr(%s) mtu(%d) metric(%d)\n",
2831 ifcp->ifc_name, ifcp->ifc_index, ifflags(ifcp->ifc_flags),
2832 inet6_n2p(&ifcp->ifc_mylladdr),
2833 ifcp->ifc_mtu, ifcp->ifc_metric);
2834 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) {
2835 if (ifcp->ifc_flags & IFF_POINTOPOINT) {
2836 inet_ntop(AF_INET6, (void *)&ifa->ifa_raddr,
2837 buf, sizeof(buf));
2838 fprintf(dump, "\t%s/%d -- %s\n",
2839 inet6_n2p(&ifa->ifa_addr),
2840 ifa->ifa_plen, buf);
2841 } else {
2842 fprintf(dump, "\t%s/%d\n",
2843 inet6_n2p(&ifa->ifa_addr),
2844 ifa->ifa_plen);
2845 }
2846 }
2847 if (ifcp->ifc_filter) {
2848 fprintf(dump, "\tFilter:");
2849 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) {
2850 addr = 0;
2851 switch (iffp->iff_type) {
2852 case 'A':
2853 ft = "Aggregate"; addr++; break;
2854 case 'N':
2855 ft = "No-use"; break;
2856 case 'O':
2857 ft = "Advertise-only"; addr++; break;
2858 case 'T':
2859 ft = "Default-only"; break;
2860 case 'L':
2861 ft = "Listen-only"; addr++; break;
2862 default:
2863 snprintf(buf, sizeof(buf), "Unknown-%c", iffp->iff_type);
2864 ft = buf;
2865 addr++;
2866 break;
2867 }
2868 fprintf(dump, " %s", ft);
2869 if (addr) {
2870 fprintf(dump, "(%s/%d)", inet6_n2p(&iffp->iff_addr),
2871 iffp->iff_plen);
2872 }
2873 }
2874 fprintf(dump, "\n");
2875 }
2876 }
2877
2878 void
2879 rtdump(int sig)
2880 {
2881 struct riprt *rrt;
2882 char buf[BUFSIZ];
2883 FILE *dump;
2884 time_t t, age;
2885
2886 if (sig == 0)
2887 dump = stderr;
2888 else
2889 if ((dump = fopen(ROUTE6D_DUMP, "a")) == NULL)
2890 dump = stderr;
2891
2892 t = time(NULL);
2893 fprintf(dump, "\n%s: Routing Table Dump\n", hms());
2894 for (rrt = riprt; rrt; rrt = rrt->rrt_next) {
2895 if (rrt->rrt_t == 0)
2896 age = 0;
2897 else
2898 age = t - rrt->rrt_t;
2899 inet_ntop(AF_INET6, (void *)&rrt->rrt_info.rip6_dest,
2900 buf, sizeof(buf));
2901 fprintf(dump, " %s/%d if(%d:%s) gw(%s) [%d] age(%ld)",
2902 buf, rrt->rrt_info.rip6_plen, rrt->rrt_index,
2903 index2ifc[rrt->rrt_index]->ifc_name,
2904 inet6_n2p(&rrt->rrt_gw),
2905 rrt->rrt_info.rip6_metric, (long)age);
2906 if (rrt->rrt_info.rip6_tag) {
2907 fprintf(dump, " tag(0x%04x)",
2908 ntohs(rrt->rrt_info.rip6_tag) & 0xffff);
2909 }
2910 if (rrt->rrt_rflags & RRTF_NH_NOT_LLADDR)
2911 fprintf(dump, " NOT-LL");
2912 if (rrt->rrt_rflags & RRTF_NOADVERTISE)
2913 fprintf(dump, " NO-ADV");
2914 fprintf(dump, "\n");
2915 }
2916 fprintf(dump, "\n");
2917 if (dump != stderr)
2918 fclose(dump);
2919 }
2920
2921 /*
2922 * Parse the -A (and -O) options and put corresponding filter object to the
2923 * specified interface structures. Each of the -A/O option has the following
2924 * syntax: -A 5f09:c400::/32,ef0,ef1 (aggregate)
2925 * -O 5f09:c400::/32,ef0,ef1 (only when match)
2926 */
2927 void
2928 filterconfig(void)
2929 {
2930 int i;
2931 char *p, *ap, *iflp, *ifname;
2932 struct iff ftmp, *iff_obj;
2933 struct ifc *ifcp;
2934 struct riprt *rrt;
2935 #if 0
2936 struct in6_addr gw;
2937 #endif
2938
2939 for (i = 0; i < nfilter; i++) {
2940 ap = filter[i];
2941 iflp = NULL;
2942 ifcp = NULL;
2943 if (filtertype[i] == 'N' || filtertype[i] == 'T') {
2944 iflp = ap;
2945 goto ifonly;
2946 }
2947 if ((p = strchr(ap, ',')) != NULL) {
2948 *p++ = '\0';
2949 iflp = p;
2950 }
2951 if ((p = strchr(ap, '/')) == NULL) {
2952 fatal("no prefixlen specified for '%s'", ap);
2953 /*NOTREACHED*/
2954 }
2955 *p++ = '\0';
2956 if (inet_pton(AF_INET6, ap, &ftmp.iff_addr) != 1) {
2957 fatal("invalid prefix specified for '%s'", ap);
2958 /*NOTREACHED*/
2959 }
2960 ftmp.iff_plen = atoi(p);
2961 ftmp.iff_next = NULL;
2962 applyplen(&ftmp.iff_addr, ftmp.iff_plen);
2963 ifonly:
2964 ftmp.iff_type = filtertype[i];
2965 if (iflp == NULL || *iflp == '\0') {
2966 fatal("no interface specified for '%s'", ap);
2967 /*NOTREACHED*/
2968 }
2969 /* parse the interface listing portion */
2970 while (iflp) {
2971 ifname = iflp;
2972 if ((iflp = strchr(iflp, ',')) != NULL)
2973 *iflp++ = '\0';
2974 ifcp = ifc_find(ifname);
2975 if (ifcp == NULL) {
2976 fatal("no interface %s exists", ifname);
2977 /*NOTREACHED*/
2978 }
2979 iff_obj = (struct iff *)malloc(sizeof(struct iff));
2980 if (iff_obj == NULL) {
2981 fatal("malloc of iff_obj");
2982 /*NOTREACHED*/
2983 }
2984 memcpy((void *)iff_obj, (void *)&ftmp,
2985 sizeof(struct iff));
2986 /* link it to the interface filter */
2987 iff_obj->iff_next = ifcp->ifc_filter;
2988 ifcp->ifc_filter = iff_obj;
2989 }
2990
2991 /*
2992 * -A: aggregate configuration.
2993 */
2994 if (filtertype[i] != 'A')
2995 continue;
2996 /* put the aggregate to the kernel routing table */
2997 rrt = (struct riprt *)malloc(sizeof(struct riprt));
2998 if (rrt == NULL) {
2999 fatal("malloc: rrt");
3000 /*NOTREACHED*/
3001 }
3002 memset(rrt, 0, sizeof(struct riprt));
3003 rrt->rrt_info.rip6_dest = ftmp.iff_addr;
3004 rrt->rrt_info.rip6_plen = ftmp.iff_plen;
3005 rrt->rrt_info.rip6_metric = 1;
3006 rrt->rrt_info.rip6_tag = htons(routetag & 0xffff);
3007 rrt->rrt_gw = in6addr_loopback;
3008 rrt->rrt_flags = RTF_UP | RTF_REJECT;
3009 rrt->rrt_rflags = RRTF_AGGREGATE;
3010 rrt->rrt_t = 0;
3011 rrt->rrt_index = loopifindex;
3012 #if 0
3013 if (getroute(&rrt->rrt_info, &gw)) {
3014 #if 0
3015 /*
3016 * When the address has already been registered in the
3017 * kernel routing table, it should be removed
3018 */
3019 delroute(&rrt->rrt_info, &gw);
3020 #else
3021 /* it is safer behavior */
3022 errno = EINVAL;
3023 fatal("%s/%u already in routing table, "
3024 "cannot aggregate",
3025 inet6_n2p(&rrt->rrt_info.rip6_dest),
3026 rrt->rrt_info.rip6_plen);
3027 /*NOTREACHED*/
3028 #endif
3029 }
3030 #endif
3031 /* Put the route to the list */
3032 rrt->rrt_next = riprt;
3033 riprt = rrt;
3034 trace(1, "Aggregate: %s/%d for %s\n",
3035 inet6_n2p(&ftmp.iff_addr), ftmp.iff_plen,
3036 ifcp->ifc_name);
3037 /* Add this route to the kernel */
3038 if (nflag) /* do not modify kernel routing table */
3039 continue;
3040 addroute(rrt, &in6addr_loopback, loopifcp);
3041 }
3042 }
3043
3044 /***************** utility functions *****************/
3045
3046 /*
3047 * Returns a pointer to ifac whose address and prefix length matches
3048 * with the address and prefix length specified in the arguments.
3049 */
3050 struct ifac *
3051 ifa_match(const struct ifc *ifcp, const struct in6_addr *ia, int plen)
3052 {
3053 struct ifac *ifa;
3054
3055 for (ifa = ifcp->ifc_addr; ifa; ifa = ifa->ifa_next) {
3056 if (IN6_ARE_ADDR_EQUAL(&ifa->ifa_addr, ia) &&
3057 ifa->ifa_plen == plen)
3058 break;
3059 }
3060 return ifa;
3061 }
3062
3063 /*
3064 * Return a pointer to riprt structure whose address and prefix length
3065 * matches with the address and prefix length found in the argument.
3066 * Note: This is not a rtalloc(). Therefore exact match is necessary.
3067 */
3068 struct riprt *
3069 rtsearch(struct netinfo6 *np, struct riprt **prev_rrt)
3070 {
3071 struct riprt *rrt;
3072
3073 if (prev_rrt)
3074 *prev_rrt = NULL;
3075 for (rrt = riprt; rrt; rrt = rrt->rrt_next) {
3076 if (rrt->rrt_info.rip6_plen == np->rip6_plen &&
3077 IN6_ARE_ADDR_EQUAL(&rrt->rrt_info.rip6_dest,
3078 &np->rip6_dest))
3079 return rrt;
3080 if (prev_rrt)
3081 *prev_rrt = rrt;
3082 }
3083 if (prev_rrt)
3084 *prev_rrt = NULL;
3085 return 0;
3086 }
3087
3088 int
3089 sin6mask2len(const struct sockaddr_in6 *sin6)
3090 {
3091 return mask2len(&sin6->sin6_addr,
3092 sin6->sin6_len - offsetof(struct sockaddr_in6, sin6_addr));
3093 }
3094
3095 int
3096 mask2len(const struct in6_addr *addr, int lenlim)
3097 {
3098 int i = 0, j;
3099 const u_char *p = (const u_char *)addr;
3100
3101 for (j = 0; j < lenlim; j++, p++) {
3102 if (*p != 0xff)
3103 break;
3104 i += 8;
3105 }
3106 if (j < lenlim) {
3107 switch (*p) {
3108 #define MASKLEN(m, l) case m: do { i += l; break; } while (0)
3109 MASKLEN(0xfe, 7); break;
3110 MASKLEN(0xfc, 6); break;
3111 MASKLEN(0xf8, 5); break;
3112 MASKLEN(0xf0, 4); break;
3113 MASKLEN(0xe0, 3); break;
3114 MASKLEN(0xc0, 2); break;
3115 MASKLEN(0x80, 1); break;
3116 #undef MASKLEN
3117 }
3118 }
3119 return i;
3120 }
3121
3122 void
3123 applymask(struct in6_addr *addr, struct in6_addr *mask)
3124 {
3125 int i;
3126 u_long *p, *q;
3127
3128 p = (u_long *)addr; q = (u_long *)mask;
3129 for (i = 0; i < 4; i++)
3130 *p++ &= *q++;
3131 }
3132
3133 static const u_char plent[8] = {
3134 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
3135 };
3136
3137 void
3138 applyplen(struct in6_addr *ia, int plen)
3139 {
3140 u_char *p;
3141 int i;
3142
3143 p = ia->s6_addr;
3144 for (i = 0; i < 16; i++) {
3145 if (plen <= 0)
3146 *p = 0;
3147 else if (plen < 8)
3148 *p &= plent[plen];
3149 p++, plen -= 8;
3150 }
3151 }
3152
3153 static const int pl2m[9] = {
3154 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff
3155 };
3156
3157 struct in6_addr *
3158 plen2mask(int n)
3159 {
3160 static struct in6_addr ia;
3161 u_char *p;
3162 int i;
3163
3164 memset(&ia, 0, sizeof(struct in6_addr));
3165 p = (u_char *)&ia;
3166 for (i = 0; i < 16; i++, p++, n -= 8) {
3167 if (n >= 8) {
3168 *p = 0xff;
3169 continue;
3170 }
3171 *p = pl2m[n];
3172 break;
3173 }
3174 return &ia;
3175 }
3176
3177 char *
3178 allocopy(char *p)
3179 {
3180 char *q = (char *)malloc(strlen(p) + 1);
3181
3182 strcpy(q, p);
3183 return q;
3184 }
3185
3186 char *
3187 hms(void)
3188 {
3189 static char buf[BUFSIZ];
3190 time_t t;
3191 struct tm *tm;
3192
3193 t = time(NULL);
3194 if ((tm = localtime(&t)) == NULL) {
3195 fatal("localtime");
3196 /*NOTREACHED*/
3197 }
3198 snprintf(buf, sizeof(buf), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
3199 tm->tm_sec);
3200 return buf;
3201 }
3202
3203 #define RIPRANDDEV 1.0 /* 30 +- 15, max - min = 30 */
3204
3205 int
3206 ripinterval(int timer)
3207 {
3208 double r = rand();
3209
3210 interval = (int)(timer + timer * RIPRANDDEV * (r / RAND_MAX - 0.5));
3211 nextalarm = time(NULL) + interval;
3212 return interval;
3213 }
3214
3215 time_t
3216 ripsuptrig(void)
3217 {
3218 time_t t;
3219
3220 double r = rand();
3221 t = (int)(RIP_TRIG_INT6_MIN +
3222 (RIP_TRIG_INT6_MAX - RIP_TRIG_INT6_MIN) * (r / RAND_MAX));
3223 sup_trig_update = time(NULL) + t;
3224 return t;
3225 }
3226
3227 void
3228 fatal(const char *fmt, ...)
3229 {
3230 va_list ap;
3231 char buf[1024];
3232
3233 va_start(ap, fmt);
3234 vsnprintf(buf, sizeof(buf), fmt, ap);
3235 perror(buf);
3236 syslog(LOG_ERR, "%s: %s", buf, strerror(errno));
3237 rtdexit();
3238 va_end(ap);
3239 }
3240
3241 void
3242 tracet(int level, const char *fmt, ...)
3243 {
3244 va_list ap;
3245
3246 va_start(ap, fmt);
3247 if (level <= dflag) {
3248 fprintf(stderr, "%s: ", hms());
3249 vfprintf(stderr, fmt, ap);
3250 }
3251 if (dflag) {
3252 if (level > 0)
3253 vsyslog(LOG_DEBUG, fmt, ap);
3254 else
3255 vsyslog(LOG_WARNING, fmt, ap);
3256 }
3257 va_end(ap);
3258 }
3259
3260 void
3261 trace(int level, const char *fmt, ...)
3262 {
3263 va_list ap;
3264
3265 va_start(ap, fmt);
3266 if (level <= dflag)
3267 vfprintf(stderr, fmt, ap);
3268 if (dflag) {
3269 if (level > 0)
3270 vsyslog(LOG_DEBUG, fmt, ap);
3271 else
3272 vsyslog(LOG_WARNING, fmt, ap);
3273 }
3274 va_end(ap);
3275 }
3276
3277 unsigned int
3278 if_maxindex(void)
3279 {
3280 struct if_nameindex *p, *p0;
3281 unsigned int max = 0;
3282
3283 p0 = if_nameindex();
3284 for (p = p0; p && p->if_index && p->if_name; p++) {
3285 if (max < p->if_index)
3286 max = p->if_index;
3287 }
3288 if_freenameindex(p0);
3289 return max;
3290 }
3291
3292 struct ifc *
3293 ifc_find(char *name)
3294 {
3295 struct ifc *ifcp;
3296
3297 for (ifcp = ifc; ifcp; ifcp = ifcp->ifc_next) {
3298 if (strcmp(name, ifcp->ifc_name) == 0)
3299 return ifcp;
3300 }
3301 return NULL;
3302 }
3303
3304 struct iff *
3305 iff_find(struct ifc *ifcp, int type)
3306 {
3307 struct iff *iffp;
3308
3309 for (iffp = ifcp->ifc_filter; iffp; iffp = iffp->iff_next) {
3310 if (iffp->iff_type == type)
3311 return iffp;
3312 }
3313 return NULL;
3314 }
3315
3316 void
3317 setindex2ifc(int idx, struct ifc *ifcp)
3318 {
3319 int n;
3320 struct ifc **p;
3321
3322 if (!index2ifc) {
3323 nindex2ifc = 5; /*initial guess*/
3324 index2ifc = (struct ifc **)
3325 malloc(sizeof(*index2ifc) * nindex2ifc);
3326 if (index2ifc == NULL) {
3327 fatal("malloc");
3328 /*NOTREACHED*/
3329 }
3330 memset(index2ifc, 0, sizeof(*index2ifc) * nindex2ifc);
3331 }
3332 n = nindex2ifc;
3333 while (nindex2ifc <= idx)
3334 nindex2ifc *= 2;
3335 if (n != nindex2ifc) {
3336 p = (struct ifc **)realloc(index2ifc,
3337 sizeof(*index2ifc) * nindex2ifc);
3338 if (p == NULL) {
3339 fatal("realloc");
3340 /*NOTREACHED*/
3341 }
3342 memset(p + n, 0, sizeof(*index2ifc) * (nindex2ifc - n));
3343 index2ifc = p;
3344 }
3345 index2ifc[idx] = ifcp;
3346 }
DragonFly BSD