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etc/services - sync with NetBSD-8
[minix.git] / usr.sbin / rtadvd / config.c
bloba7ec6579460b7cb32ce98b3ca7fbe1064c013f54
1 /* $NetBSD: config.c,v 1.34 2015/06/05 14:09:20 roy Exp $ */
2 /* $KAME: config.c,v 1.93 2005/10/17 14:40:02 suz Exp $ */
3
4 /*
5 * Copyright (C) 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/ioctl.h>
35 #include <sys/socket.h>
36 #include <sys/time.h>
37 #include <sys/sysctl.h>
38
39 #include <net/if.h>
40 #include <net/route.h>
41 #include <net/if_dl.h>
42 #ifdef __FreeBSD__
43 #include <net/if_var.h>
44 #endif
45
46 #include <netinet/in.h>
47 #include <netinet/in_var.h>
48 #include <netinet/ip6.h>
49 #include <netinet6/ip6_var.h>
50 #include <netinet/icmp6.h>
51 #include <netinet6/nd6.h>
52
53 #include <arpa/inet.h>
54
55 #include <stdio.h>
56 #include <syslog.h>
57 #include <errno.h>
58 #include <string.h>
59 #include <stdlib.h>
60 #include <search.h>
61 #include <unistd.h>
62 #include <ifaddrs.h>
63 #include <inttypes.h>
64
65 #include "rtadvd.h"
66 #include "advcap.h"
67 #include "timer.h"
68 #include "if.h"
69 #include "config.h"
70
71 #ifndef __arraycount
72 #define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
73 #endif
74
75 static time_t prefix_timo = (60 * 120); /* 2 hours.
76 * XXX: should be configurable. */
77 static struct rtadvd_timer *prefix_timeout(void *);
78 static void makeentry(char *, size_t, int, const char *);
79 static int getinet6sysctl(int);
80
81 static size_t
82 encode_domain(char *dst, const char *src)
83 {
84 ssize_t len;
85 char *odst, *p;
86
87 odst = dst;
88 while (src && (len = strlen(src)) != 0) {
89 p = strchr(src, '.');
90 *dst++ = len = MIN(63, p == NULL ? len : p - src);
91 memcpy(dst, src, len);
92 dst += len;
93 if (p == NULL)
94 break;
95 src = p + 1;
96 }
97 *dst++ = '\0';
98
99 return dst - odst;
100 }
101
102 void
103 free_rainfo(struct rainfo *rai)
104 {
105 struct prefix *pfx;
106 struct rtinfo *rti;
107 struct rdnss *rdnss;
108 struct rdnss_addr *rdnsa;
109 struct dnssl *dnssl;
110 struct dnssl_domain *dnsd;
111
112 rtadvd_remove_timer(&rai->timer);
113
114 while ((pfx = TAILQ_FIRST(&rai->prefix))) {
115 TAILQ_REMOVE(&rai->prefix, pfx, next);
116 free(pfx);
117 }
118
119 while ((rti = TAILQ_FIRST(&rai->route))) {
120 TAILQ_REMOVE(&rai->route, rti, next);
121 free(rti);
122 }
123
124 while ((rdnss = TAILQ_FIRST(&rai->rdnss))) {
125 TAILQ_REMOVE(&rai->rdnss, rdnss, next);
126 while ((rdnsa = TAILQ_FIRST(&rdnss->list))) {
127 TAILQ_REMOVE(&rdnss->list, rdnsa, next);
128 free(rdnsa);
129 }
130 free(rdnss);
131 }
132
133 while ((dnssl = TAILQ_FIRST(&rai->dnssl))) {
134 TAILQ_REMOVE(&rai->dnssl, dnssl, next);
135 while ((dnsd = TAILQ_FIRST(&dnssl->list))) {
136 TAILQ_REMOVE(&dnssl->list, dnsd, next);
137 free(dnsd);
138 }
139 free(dnssl);
140 }
141
142 free(rai->sdl);
143 free(rai->ra_data);
144 free(rai);
145 }
146
147 void
148 getconfig(const char *intface, int exithard)
149 {
150 int stat, c, i;
151 char tbuf[BUFSIZ];
152 struct rainfo *tmp, *rai;
153 int32_t val;
154 int64_t val64;
155 char buf[BUFSIZ];
156 char *bp = buf;
157 char *addr, *flagstr, *ap;
158 static int forwarding = -1;
159 char entbuf[256], abuf[256];
160 struct rdnss *rdnss;
161 struct dnssl *dnssl;
162
163 #define MUSTHAVE(var, cap) \
164 do { \
165 int64_t t; \
166 if ((t = agetnum(cap)) < 0) { \
167 fprintf(stderr, "rtadvd: need %s for interface %s\n", \
168 cap, intface); \
169 goto errexit; \
170 } \
171 var = t; \
172 } while (0)
173 #define MAYHAVE(var, cap, def) \
174 do { \
175 if ((var = agetnum(cap)) < 0) \
176 var = def; \
177 } while (0)
178 #define ELM_MALLOC(p) \
179 do { \
180 p = calloc(1, sizeof(*p)); \
181 if (p == NULL) { \
182 syslog(LOG_ERR, "<%s> calloc failed: %m", \
183 __func__); \
184 goto errexit; \
185 } \
186 } while(/*CONSTCOND*/0)
187
188 if (if_nametoindex(intface) == 0) {
189 syslog(LOG_INFO, "<%s> interface %s not found, ignoring",
190 __func__, intface);
191 return;
192 }
193
194 syslog(LOG_DEBUG, "<%s> loading configuration for interface %s",
195 __func__, intface);
196
197 if ((stat = agetent(tbuf, intface)) <= 0) {
198 memset(tbuf, 0, sizeof(tbuf));
199 syslog(LOG_INFO,
200 "<%s> %s isn't defined in the configuration file"
201 " or the configuration file doesn't exist."
202 " Treat it as default",
203 __func__, intface);
204 }
205
206 ELM_MALLOC(tmp);
207 TAILQ_INIT(&tmp->prefix);
208 TAILQ_INIT(&tmp->route);
209 TAILQ_INIT(&tmp->rdnss);
210 TAILQ_INIT(&tmp->dnssl);
211
212 /* check if we are allowed to forward packets (if not determined) */
213 if (forwarding < 0) {
214 if ((forwarding = getinet6sysctl(IPV6CTL_FORWARDING)) < 0)
215 exit(1);
216 }
217
218 /* get interface information */
219 if (agetflag("nolladdr"))
220 tmp->advlinkopt = 0;
221 else
222 tmp->advlinkopt = 1;
223 if (tmp->advlinkopt) {
224 if ((tmp->sdl = if_nametosdl(intface)) == NULL) {
225 syslog(LOG_ERR,
226 "<%s> can't get information of %s",
227 __func__, intface);
228 goto errexit;
229 }
230 tmp->ifindex = tmp->sdl->sdl_index;
231 } else {
232 tmp->ifindex = if_nametoindex(intface);
233 if (tmp->ifindex == 0) {
234 syslog(LOG_ERR,
235 "<%s> can't get information of %s",
236 __func__, intface);
237 goto errexit;
238 }
239 }
240 tmp->ifflags = if_getflags(tmp->ifindex, 0);
241 strlcpy(tmp->ifname, intface, sizeof(tmp->ifname));
242 if ((tmp->phymtu = if_getmtu(intface)) == 0) {
243 tmp->phymtu = IPV6_MMTU;
244 syslog(LOG_WARNING,
245 "<%s> can't get interface mtu of %s. Treat as %d",
246 __func__, intface, IPV6_MMTU);
247 }
248
249 /*
250 * set router configuration variables.
251 */
252 MAYHAVE(val, "maxinterval", DEF_MAXRTRADVINTERVAL);
253 if (val < MIN_MAXINTERVAL || val > MAX_MAXINTERVAL) {
254 syslog(LOG_ERR,
255 "<%s> maxinterval (%d) on %s is invalid "
256 "(must be between %u and %u)", __func__, val,
257 intface, MIN_MAXINTERVAL, MAX_MAXINTERVAL);
258 goto errexit;
259 }
260 tmp->maxinterval = val;
261 MAYHAVE(val, "mininterval", tmp->maxinterval/3);
262 if (val < MIN_MININTERVAL || val > (tmp->maxinterval * 3) / 4) {
263 syslog(LOG_ERR,
264 "<%s> mininterval (%d) on %s is invalid "
265 "(must be between %u and %d)",
266 __func__, val, intface, MIN_MININTERVAL,
267 (tmp->maxinterval * 3) / 4);
268 goto errexit;
269 }
270 tmp->mininterval = val;
271
272 MAYHAVE(val, "chlim", DEF_ADVCURHOPLIMIT);
273 tmp->hoplimit = val & 0xff;
274
275 if ((flagstr = (char *)agetstr("raflags", &bp))) {
276 val = 0;
277 if (strchr(flagstr, 'm'))
278 val |= ND_RA_FLAG_MANAGED;
279 if (strchr(flagstr, 'o'))
280 val |= ND_RA_FLAG_OTHER;
281 if (strchr(flagstr, 'h'))
282 val |= ND_RA_FLAG_RTPREF_HIGH;
283 if (strchr(flagstr, 'l')) {
284 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
285 syslog(LOG_ERR, "<%s> the \'h\' and \'l\'"
286 " router flags are exclusive", __func__);
287 goto errexit;
288 }
289 val |= ND_RA_FLAG_RTPREF_LOW;
290 }
291 } else {
292 MAYHAVE(val, "raflags", 0);
293 }
294 tmp->managedflg = val & ND_RA_FLAG_MANAGED;
295 tmp->otherflg = val & ND_RA_FLAG_OTHER;
296 #ifndef ND_RA_FLAG_RTPREF_MASK
297 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
298 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
299 #endif
300 tmp->rtpref = val & ND_RA_FLAG_RTPREF_MASK;
301 if (tmp->rtpref == ND_RA_FLAG_RTPREF_RSV) {
302 syslog(LOG_ERR, "<%s> invalid router preference (%02x) on %s",
303 __func__, tmp->rtpref, intface);
304 goto errexit;
305 }
306
307 MAYHAVE(val, "rltime", tmp->maxinterval * 3);
308 if (val && (val < tmp->maxinterval || val > MAXROUTERLIFETIME)) {
309 syslog(LOG_ERR,
310 "<%s> router lifetime (%d) on %s is invalid "
311 "(must be 0 or between %d and %d)",
312 __func__, val, intface,
313 tmp->maxinterval, MAXROUTERLIFETIME);
314 goto errexit;
315 }
316 /*
317 * Basically, hosts MUST NOT send Router Advertisement messages at any
318 * time (RFC 2461, Section 6.2.3). However, it would sometimes be
319 * useful to allow hosts to advertise some parameters such as prefix
320 * information and link MTU. Thus, we allow hosts to invoke rtadvd
321 * only when router lifetime (on every advertising interface) is
322 * explicitly set zero. (see also the above section)
323 */
324 if (val && forwarding == 0) {
325 syslog(LOG_ERR,
326 "<%s> non zero router lifetime is specified for %s, "
327 "which must not be allowed for hosts. you must "
328 "change router lifetime or enable IPv6 forwarding.",
329 __func__, intface);
330 goto errexit;
331 }
332 tmp->lifetime = val & 0xffff;
333
334 MAYHAVE(val, "rtime", DEF_ADVREACHABLETIME);
335 if (val < 0 || val > MAXREACHABLETIME) {
336 syslog(LOG_ERR,
337 "<%s> reachable time (%d) on %s is invalid "
338 "(must be no greater than %d)",
339 __func__, val, intface, MAXREACHABLETIME);
340 goto errexit;
341 }
342 tmp->reachabletime = (uint32_t)val;
343
344 MAYHAVE(val64, "retrans", DEF_ADVRETRANSTIMER);
345 if (val64 < 0 || val64 > 0xffffffff) {
346 syslog(LOG_ERR, "<%s> retrans time (%lld) on %s out of range",
347 __func__, (long long)val64, intface);
348 goto errexit;
349 }
350 tmp->retranstimer = (uint32_t)val64;
351
352 if (agetnum("hapref") != -1 || agetnum("hatime") != -1) {
353 syslog(LOG_ERR,
354 "<%s> mobile-ip6 configuration not supported",
355 __func__);
356 goto errexit;
357 }
358 /* prefix information */
359
360 /*
361 * This is an implementation specific parameter to consider
362 * link propagation delays and poorly synchronized clocks when
363 * checking consistency of advertised lifetimes.
364 */
365 MAYHAVE(val, "clockskew", 0);
366 tmp->clockskew = val;
367
368 tmp->pfxs = 0;
369 for (i = -1; i < MAXPREFIX; i++) {
370 struct prefix *pfx;
371
372 makeentry(entbuf, sizeof(entbuf), i, "addr");
373 addr = (char *)agetstr(entbuf, &bp);
374 if (addr == NULL)
375 continue;
376
377 /* allocate memory to store prefix information */
378 if ((pfx = calloc(1, sizeof(*pfx))) == NULL) {
379 syslog(LOG_ERR,
380 "<%s> can't allocate memory: %m",
381 __func__);
382 goto errexit;
383 }
384
385 TAILQ_INSERT_TAIL(&tmp->prefix, pfx, next);
386 tmp->pfxs++;
387 pfx->rainfo = tmp;
388
389 pfx->origin = PREFIX_FROM_CONFIG;
390
391 if (inet_pton(AF_INET6, addr, &pfx->prefix) != 1) {
392 syslog(LOG_ERR,
393 "<%s> inet_pton failed for %s",
394 __func__, addr);
395 goto errexit;
396 }
397 if (IN6_IS_ADDR_MULTICAST(&pfx->prefix)) {
398 syslog(LOG_ERR,
399 "<%s> multicast prefix (%s) must "
400 "not be advertised on %s",
401 __func__, addr, intface);
402 goto errexit;
403 }
404 if (IN6_IS_ADDR_LINKLOCAL(&pfx->prefix))
405 syslog(LOG_NOTICE,
406 "<%s> link-local prefix (%s) will be"
407 " advertised on %s",
408 __func__, addr, intface);
409
410 makeentry(entbuf, sizeof(entbuf), i, "prefixlen");
411 MAYHAVE(val, entbuf, 64);
412 if (val < 0 || val > 128) {
413 syslog(LOG_ERR, "<%s> prefixlen (%d) for %s "
414 "on %s out of range",
415 __func__, val, addr, intface);
416 goto errexit;
417 }
418 pfx->prefixlen = (int)val;
419
420 makeentry(entbuf, sizeof(entbuf), i, "pinfoflags");
421 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
422 val = 0;
423 if (strchr(flagstr, 'l'))
424 val |= ND_OPT_PI_FLAG_ONLINK;
425 if (strchr(flagstr, 'a'))
426 val |= ND_OPT_PI_FLAG_AUTO;
427 } else {
428 MAYHAVE(val, entbuf,
429 (ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO));
430 }
431 pfx->onlinkflg = val & ND_OPT_PI_FLAG_ONLINK;
432 pfx->autoconfflg = val & ND_OPT_PI_FLAG_AUTO;
433
434 makeentry(entbuf, sizeof(entbuf), i, "vltime");
435 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
436 if (val64 < 0 || val64 > 0xffffffff) {
437 syslog(LOG_ERR, "<%s> vltime (%lld) for "
438 "%s/%d on %s is out of range",
439 __func__, (long long)val64,
440 addr, pfx->prefixlen, intface);
441 goto errexit;
442 }
443 pfx->validlifetime = (uint32_t)val64;
444
445 makeentry(entbuf, sizeof(entbuf), i, "vltimedecr");
446 if (agetflag(entbuf)) {
447 struct timespec now;
448 clock_gettime(CLOCK_MONOTONIC, &now);
449 pfx->vltimeexpire =
450 now.tv_sec + pfx->validlifetime;
451 }
452
453 makeentry(entbuf, sizeof(entbuf), i, "pltime");
454 MAYHAVE(val64, entbuf, DEF_ADVPREFERREDLIFETIME);
455 if (val64 < 0 || val64 > 0xffffffff) {
456 syslog(LOG_ERR,
457 "<%s> pltime (%lld) for %s/%d on %s "
458 "is out of range",
459 __func__, (long long)val64,
460 addr, pfx->prefixlen, intface);
461 goto errexit;
462 }
463 pfx->preflifetime = (uint32_t)val64;
464
465 makeentry(entbuf, sizeof(entbuf), i, "pltimedecr");
466 if (agetflag(entbuf)) {
467 struct timespec now;
468 clock_gettime(CLOCK_MONOTONIC, &now);
469 pfx->pltimeexpire =
470 now.tv_sec + pfx->preflifetime;
471 }
472 }
473 if (TAILQ_FIRST(&tmp->prefix) == NULL && !agetflag("noifprefix"))
474 get_prefix(tmp);
475
476 MAYHAVE(val64, "mtu", 0);
477 if (val64 < 0 || val64 > 0xffffffff) {
478 syslog(LOG_ERR,
479 "<%s> mtu (%" PRIi64 ") on %s out of range",
480 __func__, val64, intface);
481 goto errexit;
482 }
483 tmp->linkmtu = (uint32_t)val64;
484 if (tmp->linkmtu == 0) {
485 char *mtustr;
486
487 if ((mtustr = (char *)agetstr("mtu", &bp)) &&
488 strcmp(mtustr, "auto") == 0)
489 tmp->linkmtu = tmp->phymtu;
490 }
491 else if (tmp->linkmtu < IPV6_MMTU || tmp->linkmtu > tmp->phymtu) {
492 syslog(LOG_ERR,
493 "<%s> advertised link mtu (%d) on %s is invalid (must "
494 "be between least MTU (%d) and physical link MTU (%d)",
495 __func__, tmp->linkmtu, intface,
496 IPV6_MMTU, tmp->phymtu);
497 goto errexit;
498 }
499
500 #ifdef SIOCSIFINFO_IN6
501 {
502 struct in6_ndireq ndi;
503 int s;
504
505 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
506 syslog(LOG_ERR, "<%s> socket: %m", __func__);
507 goto errexit;
508 }
509 memset(&ndi, 0, sizeof(ndi));
510 strncpy(ndi.ifname, intface, IFNAMSIZ);
511 if (ioctl(s, SIOCGIFINFO_IN6, &ndi) < 0) {
512 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFINFO_IN6 at %s: %m",
513 __func__, intface);
514 }
515
516 /* reflect the RA info to the host variables in kernel */
517 ndi.ndi.chlim = tmp->hoplimit;
518 ndi.ndi.retrans = tmp->retranstimer;
519 ndi.ndi.basereachable = tmp->reachabletime;
520 if (ioctl(s, SIOCSIFINFO_IN6, &ndi) < 0) {
521 syslog(LOG_INFO, "<%s> ioctl:SIOCSIFINFO_IN6 at %s: %m",
522 __func__, intface);
523 }
524 close(s);
525 }
526 #endif
527
528 /* route information */
529 for (i = -1; i < MAXROUTE; i++) {
530 struct rtinfo *rti;
531 char oentbuf[256];
532
533 makeentry(entbuf, sizeof(entbuf), i, "rtprefix");
534 addr = (char *)agetstr(entbuf, &bp);
535 if (addr == NULL) {
536 makeentry(oentbuf, sizeof(oentbuf), i, "rtrprefix");
537 addr = (char *)agetstr(oentbuf, &bp);
538 if (addr) {
539 fprintf(stderr, "%s was obsoleted. Use %s.\n",
540 oentbuf, entbuf);
541 }
542 }
543 if (addr == NULL)
544 continue;
545
546 ELM_MALLOC(rti);
547 memset(rti, 0, sizeof(*rti));
548
549 /* link into chain */
550 TAILQ_INSERT_TAIL(&tmp->route, rti, next);
551
552 if (inet_pton(AF_INET6, addr, &rti->prefix) != 1) {
553 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
554 __func__, addr);
555 goto errexit;
556 }
557 #if 0
558 /*
559 * XXX: currently there's no restriction in route information
560 * prefix according to
561 * draft-ietf-ipngwg-router-selection-00.txt.
562 * However, I think the similar restriction be necessary.
563 */
564 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
565 if (IN6_IS_ADDR_MULTICAST(&rti->prefix)) {
566 syslog(LOG_ERR,
567 "<%s> multicast route (%s) must "
568 "not be advertised on %s",
569 __func__, addr, intface);
570 goto errexit;
571 }
572 if (IN6_IS_ADDR_LINKLOCAL(&rti->prefix)) {
573 syslog(LOG_NOTICE,
574 "<%s> link-local route (%s) will "
575 "be advertised on %s",
576 __func__, addr, intface);
577 goto errexit;
578 }
579 #endif
580
581 makeentry(entbuf, sizeof(entbuf), i, "rtplen");
582 /* XXX: 256 is a magic number for compatibility check. */
583 MAYHAVE(val, entbuf, 256);
584 if (val == 256) {
585 makeentry(oentbuf, sizeof(oentbuf), i, "rtrplen");
586 MAYHAVE(val, oentbuf, 256);
587 if (val != 256) {
588 fprintf(stderr, "%s was obsoleted. Use %s.\n",
589 oentbuf, entbuf);
590 } else
591 val = 64;
592 }
593 if (val < 0 || val > 128) {
594 syslog(LOG_ERR, "<%s> prefixlen (%d) for %s on %s "
595 "out of range",
596 __func__, val, addr, intface);
597 goto errexit;
598 }
599 rti->prefixlen = (int)val;
600
601 makeentry(entbuf, sizeof(entbuf), i, "rtflags");
602 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
603 val = 0;
604 if (strchr(flagstr, 'h'))
605 val |= ND_RA_FLAG_RTPREF_HIGH;
606 if (strchr(flagstr, 'l')) {
607 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
608 syslog(LOG_ERR,
609 "<%s> the \'h\' and \'l\' route"
610 " preferences are exclusive",
611 __func__);
612 goto errexit;
613 }
614 val |= ND_RA_FLAG_RTPREF_LOW;
615 }
616 } else
617 MAYHAVE(val, entbuf, 256); /* XXX */
618 if (val == 256) {
619 makeentry(oentbuf, sizeof(oentbuf), i, "rtrflags");
620 MAYHAVE(val, oentbuf, 256);
621 if (val != 256) {
622 fprintf(stderr, "%s was obsoleted. Use %s.\n",
623 oentbuf, entbuf);
624 } else
625 val = 0;
626 }
627 rti->rtpref = val & ND_RA_FLAG_RTPREF_MASK;
628 if (rti->rtpref == ND_RA_FLAG_RTPREF_RSV) {
629 syslog(LOG_ERR, "<%s> invalid route preference (%02x) "
630 "for %s/%d on %s",
631 __func__, rti->rtpref, addr,
632 rti->prefixlen, intface);
633 goto errexit;
634 }
635
636 /*
637 * Since the spec does not a default value, we should make
638 * this entry mandatory. However, FreeBSD 4.4 has shipped
639 * with this field being optional, we use the router lifetime
640 * as an ad-hoc default value with a warning message.
641 */
642 makeentry(entbuf, sizeof(entbuf), i, "rtltime");
643 MAYHAVE(val64, entbuf, -1);
644 if (val64 == -1) {
645 makeentry(oentbuf, sizeof(oentbuf), i, "rtrltime");
646 MAYHAVE(val64, oentbuf, -1);
647 if (val64 != -1) {
648 fprintf(stderr, "%s was obsoleted. Use %s.\n",
649 oentbuf, entbuf);
650 } else {
651 fprintf(stderr, "%s should be specified "
652 "for interface %s.\n",
653 entbuf, intface);
654 val64 = tmp->lifetime;
655 }
656 }
657 if (val64 < 0 || val64 > 0xffffffff) {
658 syslog(LOG_ERR, "<%s> route lifetime (%lld) for "
659 "%s/%d on %s out of range", __func__,
660 (long long)val64, addr, rti->prefixlen, intface);
661 goto errexit;
662 }
663 rti->ltime = (uint32_t)val64;
664 }
665
666 /* RDNSS */
667 for (i = -1; i < MAXRDNSS; i++) {
668 struct rdnss_addr *rdnsa;
669
670 makeentry(entbuf, sizeof(entbuf), i, "rdnss");
671 addr = (char *)agetstr(entbuf, &bp);
672 if (addr == NULL)
673 continue;
674
675 ELM_MALLOC(rdnss);
676 TAILQ_INSERT_TAIL(&tmp->rdnss, rdnss, next);
677 TAILQ_INIT(&rdnss->list);
678
679 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
680 c = strcspn(ap, ",");
681 strncpy(abuf, ap, c);
682 abuf[c] = '\0';
683 ELM_MALLOC(rdnsa);
684 TAILQ_INSERT_TAIL(&rdnss->list, rdnsa, next);
685 if (inet_pton(AF_INET6, abuf, &rdnsa->addr) != 1) {
686 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
687 __func__, addr);
688 goto errexit;
689 }
690 }
691
692 makeentry(entbuf, sizeof(entbuf), i, "rdnssltime");
693 MAYHAVE(val64, entbuf, tmp->maxinterval * 3 / 2);
694 if (val64 < tmp->maxinterval ||
695 val64 > tmp->maxinterval * 2)
696 {
697 syslog(LOG_ERR, "<%s> %s (%lld) on %s is invalid",
698 __func__, entbuf, (long long)val64, intface);
699 goto errexit;
700 }
701 rdnss->lifetime = (uint32_t)val64;
702
703 }
704
705 /* DNSSL */
706 TAILQ_INIT(&tmp->dnssl);
707 for (i = -1; i < MAXDNSSL; i++) {
708 struct dnssl_domain *dnsd;
709
710 makeentry(entbuf, sizeof(entbuf), i, "dnssl");
711 addr = (char *)agetstr(entbuf, &bp);
712 if (addr == NULL)
713 continue;
714
715 ELM_MALLOC(dnssl);
716 TAILQ_INSERT_TAIL(&tmp->dnssl, dnssl, next);
717 TAILQ_INIT(&dnssl->list);
718
719 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
720 c = strcspn(ap, ",");
721 strncpy(abuf, ap, c);
722 abuf[c] = '\0';
723 ELM_MALLOC(dnsd);
724 TAILQ_INSERT_TAIL(&dnssl->list, dnsd, next);
725 dnsd->len = encode_domain(dnsd->domain, abuf);
726 }
727
728 makeentry(entbuf, sizeof(entbuf), i, "dnsslltime");
729 MAYHAVE(val64, entbuf, tmp->maxinterval * 3 / 2);
730 if (val64 < tmp->maxinterval ||
731 val64 > tmp->maxinterval * 2)
732 {
733 syslog(LOG_ERR, "<%s> %s (%lld) on %s is invalid",
734 __func__, entbuf, (long long)val64, intface);
735 goto errexit;
736 }
737 dnssl->lifetime = (uint32_t)val64;
738
739 }
740
741 TAILQ_FOREACH(rai, &ralist, next) {
742 if (rai->ifindex == tmp->ifindex) {
743 TAILQ_REMOVE(&ralist, rai, next);
744 /* If we already have a leaving RA use that
745 * as this config hasn't been advertised */
746 if (rai->leaving) {
747 tmp->leaving = rai->leaving;
748 free_rainfo(rai);
749 rai = tmp->leaving;
750 rai->leaving_for = tmp;
751 break;
752 }
753 rai->lifetime = 0;
754 TAILQ_FOREACH(rdnss, &rai->rdnss, next)
755 rdnss->lifetime = 0;
756 TAILQ_FOREACH(dnssl, &rai->dnssl, next)
757 dnssl->lifetime = 0;
758 rai->leaving_for = tmp;
759 tmp->leaving = rai;
760 rai->initcounter = MAX_INITIAL_RTR_ADVERTISEMENTS;
761 rai->mininterval = MIN_DELAY_BETWEEN_RAS;
762 rai->maxinterval = MIN_DELAY_BETWEEN_RAS;
763 rai->leaving_adv = MAX_FINAL_RTR_ADVERTISEMENTS;
764 if (rai->timer == NULL)
765 rai->timer = rtadvd_add_timer(ra_timeout,
766 ra_timer_update,
767 rai, rai);
768 ra_timer_update((void *)rai, &rai->timer->tm);
769 rtadvd_set_timer(&rai->timer->tm, rai->timer);
770 break;
771 }
772 }
773
774 /* okey */
775 TAILQ_INSERT_TAIL(&ralist, tmp, next);
776
777 /* construct the sending packet */
778 make_packet(tmp);
779
780 /* set timer */
781 if (rai)
782 return;
783 tmp->timer = rtadvd_add_timer(ra_timeout, ra_timer_update,
784 tmp, tmp);
785 ra_timer_set_short_delay(tmp);
786
787 return;
788
789 errexit:
790 if (exithard)
791 exit(1);
792 free_rainfo(tmp);
793 }
794
795 void
796 get_prefix(struct rainfo *rai)
797 {
798 struct ifaddrs *ifap, *ifa;
799 struct prefix *pp;
800 struct in6_addr *a;
801 unsigned char *p, *ep, *m, *lim;
802 char ntopbuf[INET6_ADDRSTRLEN];
803
804 if (getifaddrs(&ifap) < 0) {
805 syslog(LOG_ERR,
806 "<%s> can't get interface addresses",
807 __func__);
808 exit(1);
809 }
810
811 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
812 int plen;
813
814 if (strcmp(ifa->ifa_name, rai->ifname) != 0)
815 continue;
816 if (ifa->ifa_addr->sa_family != AF_INET6)
817 continue;
818 a = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
819 if (IN6_IS_ADDR_LINKLOCAL(a))
820 continue;
821 /* get prefix length */
822 m = (unsigned char *)&((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
823 lim = (unsigned char *)(ifa->ifa_netmask) + ifa->ifa_netmask->sa_len;
824 plen = prefixlen(m, lim);
825 if (plen <= 0 || plen > 128) {
826 syslog(LOG_ERR, "<%s> failed to get prefixlen "
827 "or prefix is invalid",
828 __func__);
829 exit(1);
830 }
831 if (plen == 128) /* XXX */
832 continue;
833 if (find_prefix(rai, a, plen)) {
834 /* ignore a duplicated prefix. */
835 continue;
836 }
837
838 /* allocate memory to store prefix info. */
839 if ((pp = calloc(1, sizeof(*pp))) == NULL) {
840 syslog(LOG_ERR,
841 "<%s> can't get allocate buffer for prefix",
842 __func__);
843 exit(1);
844 }
845
846 /* set prefix, sweep bits outside of prefixlen */
847 pp->prefixlen = plen;
848 memcpy(&pp->prefix, a, sizeof(*a));
849 if (1)
850 {
851 p = (unsigned char *)&pp->prefix;
852 ep = (unsigned char *)(&pp->prefix + 1);
853 while (m < lim && p < ep)
854 *p++ &= *m++;
855 while (p < ep)
856 *p++ = 0x00;
857 }
858 if (!inet_ntop(AF_INET6, &pp->prefix, ntopbuf,
859 sizeof(ntopbuf))) {
860 syslog(LOG_ERR, "<%s> inet_ntop failed", __func__);
861 exit(1);
862 }
863 syslog(LOG_DEBUG,
864 "<%s> add %s/%d to prefix list on %s",
865 __func__, ntopbuf, pp->prefixlen, rai->ifname);
866
867 /* set other fields with protocol defaults */
868 pp->validlifetime = DEF_ADVVALIDLIFETIME;
869 pp->preflifetime = DEF_ADVPREFERREDLIFETIME;
870 pp->onlinkflg = 1;
871 pp->autoconfflg = 1;
872 pp->origin = PREFIX_FROM_KERNEL;
873 pp->rainfo = rai;
874
875 /* link into chain */
876 TAILQ_INSERT_TAIL(&rai->prefix, pp, next);
877 rai->pfxs++;
878 }
879
880 freeifaddrs(ifap);
881 }
882
883 static void
884 makeentry(char *buf, size_t len, int id, const char *string)
885 {
886
887 if (id < 0)
888 strlcpy(buf, string, len);
889 else
890 snprintf(buf, len, "%s%d", string, id);
891 }
892
893 /*
894 * Add a prefix to the list of specified interface and reconstruct
895 * the outgoing packet.
896 * The prefix must not be in the list.
897 * XXX: other parameters of the prefix(e.g. lifetime) should be
898 * able to be specified.
899 */
900 static void
901 add_prefix(struct rainfo *rai, struct in6_prefixreq *ipr)
902 {
903 struct prefix *prefix;
904 char ntopbuf[INET6_ADDRSTRLEN];
905
906 if ((prefix = calloc(1, sizeof(*prefix))) == NULL) {
907 syslog(LOG_ERR, "<%s> memory allocation failed",
908 __func__);
909 return; /* XXX: error or exit? */
910 }
911 prefix->prefix = ipr->ipr_prefix.sin6_addr;
912 prefix->prefixlen = ipr->ipr_plen;
913 prefix->validlifetime = ipr->ipr_vltime;
914 prefix->preflifetime = ipr->ipr_pltime;
915 prefix->onlinkflg = ipr->ipr_raf_onlink;
916 prefix->autoconfflg = ipr->ipr_raf_auto;
917 prefix->origin = PREFIX_FROM_DYNAMIC;
918
919 prefix->rainfo = rai;
920 TAILQ_INSERT_TAIL(&rai->prefix, prefix, next);
921 rai->pfxs++;
922
923 syslog(LOG_DEBUG, "<%s> new prefix %s/%d was added on %s",
924 __func__, inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr,
925 ntopbuf, INET6_ADDRSTRLEN),
926 ipr->ipr_plen, rai->ifname);
927
928 /* free the previous packet */
929 free(rai->ra_data);
930 rai->ra_data = NULL;
931
932 /* reconstruct the packet */
933 make_packet(rai);
934 }
935
936 /*
937 * Delete a prefix to the list of specified interface and reconstruct
938 * the outgoing packet.
939 * The prefix must be in the list.
940 */
941 void
942 delete_prefix(struct prefix *prefix)
943 {
944 char ntopbuf[INET6_ADDRSTRLEN];
945 struct rainfo *rai = prefix->rainfo;
946
947 TAILQ_REMOVE(&rai->prefix, prefix, next);
948 rai->pfxs--;
949 syslog(LOG_DEBUG, "<%s> prefix %s/%d was deleted on %s",
950 __func__, inet_ntop(AF_INET6, &prefix->prefix,
951 ntopbuf, INET6_ADDRSTRLEN),
952 prefix->prefixlen, rai->ifname);
953 rtadvd_remove_timer(&prefix->timer);
954 free(prefix);
955 }
956
957 void
958 invalidate_prefix(struct prefix *prefix)
959 {
960 char ntopbuf[INET6_ADDRSTRLEN];
961 struct timespec timo;
962 struct rainfo *rai = prefix->rainfo;
963
964 if (prefix->timer) { /* sanity check */
965 syslog(LOG_ERR,
966 "<%s> assumption failure: timer already exists",
967 __func__);
968 exit(1);
969 }
970
971 syslog(LOG_DEBUG, "<%s> prefix %s/%d was invalidated on %s, "
972 "will expire in %ld seconds", __func__,
973 inet_ntop(AF_INET6, &prefix->prefix, ntopbuf, INET6_ADDRSTRLEN),
974 prefix->prefixlen, rai->ifname, (long)prefix_timo);
975
976 /* set the expiration timer */
977 prefix->timer = rtadvd_add_timer(prefix_timeout, NULL, prefix, NULL);
978 if (prefix->timer == NULL) {
979 syslog(LOG_ERR, "<%s> failed to add a timer for a prefix. "
980 "remove the prefix", __func__);
981 delete_prefix(prefix);
982 }
983 timo.tv_sec = prefix_timo;
984 timo.tv_nsec = 0;
985 rtadvd_set_timer(&timo, prefix->timer);
986 }
987
988 static struct rtadvd_timer *
989 prefix_timeout(void *arg)
990 {
991 struct prefix *prefix = (struct prefix *)arg;
992
993 delete_prefix(prefix);
994
995 return(NULL);
996 }
997
998 void
999 update_prefix(struct prefix * prefix)
1000 {
1001 char ntopbuf[INET6_ADDRSTRLEN];
1002 struct rainfo *rai = prefix->rainfo;
1003
1004 if (prefix->timer == NULL) { /* sanity check */
1005 syslog(LOG_ERR,
1006 "<%s> assumption failure: timer does not exist",
1007 __func__);
1008 exit(1);
1009 }
1010
1011 syslog(LOG_DEBUG, "<%s> prefix %s/%d was re-enabled on %s",
1012 __func__, inet_ntop(AF_INET6, &prefix->prefix, ntopbuf,
1013 INET6_ADDRSTRLEN), prefix->prefixlen, rai->ifname);
1014
1015 /* stop the expiration timer */
1016 rtadvd_remove_timer(&prefix->timer);
1017 }
1018
1019 /*
1020 * Try to get an in6_prefixreq contents for a prefix which matches
1021 * ipr->ipr_prefix and ipr->ipr_plen and belongs to
1022 * the interface whose name is ipr->ipr_name[].
1023 */
1024 static int
1025 init_prefix(struct in6_prefixreq *ipr)
1026 {
1027 #if 0
1028 int s;
1029
1030 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1031 syslog(LOG_ERR, "<%s> socket: %m", __func__);
1032 exit(1);
1033 }
1034
1035 if (ioctl(s, SIOCGIFPREFIX_IN6, ipr) < 0) {
1036 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFPREFIX: %m", __func__);
1037
1038 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1039 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1040 ipr->ipr_raf_onlink = 1;
1041 ipr->ipr_raf_auto = 1;
1042 /* omit other field initialization */
1043 }
1044 else if (ipr->ipr_origin < PR_ORIG_RR) {
1045 char ntopbuf[INET6_ADDRSTRLEN];
1046
1047 syslog(LOG_WARNING, "<%s> Added prefix(%s)'s origin %d is"
1048 "lower than PR_ORIG_RR(router renumbering)."
1049 "This should not happen if I am router", __func__,
1050 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1051 sizeof(ntopbuf)), ipr->ipr_origin);
1052 close(s);
1053 return 1;
1054 }
1055
1056 close(s);
1057 return 0;
1058 #else
1059 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1060 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1061 ipr->ipr_raf_onlink = 1;
1062 ipr->ipr_raf_auto = 1;
1063 return 0;
1064 #endif
1065 }
1066
1067 void
1068 make_prefix(struct rainfo *rai, int ifindex, struct in6_addr *addr, int plen)
1069 {
1070 struct in6_prefixreq ipr;
1071
1072 memset(&ipr, 0, sizeof(ipr));
1073 if (if_indextoname(ifindex, ipr.ipr_name) == NULL) {
1074 syslog(LOG_ERR, "<%s> Prefix added interface No.%d doesn't"
1075 "exist. This should not happen: %m", __func__,
1076 ifindex);
1077 exit(1);
1078 }
1079 ipr.ipr_prefix.sin6_len = sizeof(ipr.ipr_prefix);
1080 ipr.ipr_prefix.sin6_family = AF_INET6;
1081 ipr.ipr_prefix.sin6_addr = *addr;
1082 ipr.ipr_plen = plen;
1083
1084 if (init_prefix(&ipr))
1085 return; /* init failed by some error */
1086 add_prefix(rai, &ipr);
1087 }
1088
1089 void
1090 make_packet(struct rainfo *rainfo)
1091 {
1092 size_t packlen, lladdroptlen = 0;
1093 char *buf;
1094 struct nd_router_advert *ra;
1095 struct nd_opt_prefix_info *ndopt_pi;
1096 struct nd_opt_mtu *ndopt_mtu;
1097 struct prefix *pfx;
1098 struct nd_opt_route_info *ndopt_rti;
1099 struct rtinfo *rti;
1100 struct nd_opt_rdnss *ndopt_rdnss;
1101 struct rdnss *rdns;
1102 struct rdnss_addr *rdnsa;
1103 struct nd_opt_dnssl *ndopt_dnssl;
1104 struct dnssl *dnsl;
1105 struct dnssl_domain *dnsd;
1106 size_t len, plen;
1107
1108 /* calculate total length */
1109 packlen = sizeof(struct nd_router_advert);
1110 if (rainfo->advlinkopt) {
1111 if ((lladdroptlen = lladdropt_length(rainfo->sdl)) == 0) {
1112 syslog(LOG_INFO,
1113 "<%s> link-layer address option has"
1114 " null length on %s. Treat as not included.",
1115 __func__, rainfo->ifname);
1116 rainfo->advlinkopt = 0;
1117 }
1118 packlen += lladdroptlen;
1119 }
1120 if (TAILQ_FIRST(&rainfo->prefix) != NULL)
1121 packlen += sizeof(struct nd_opt_prefix_info) * rainfo->pfxs;
1122 if (rainfo->linkmtu)
1123 packlen += sizeof(struct nd_opt_mtu);
1124 TAILQ_FOREACH(rti, &rainfo->route, next)
1125 packlen += sizeof(struct nd_opt_route_info) +
1126 ((rti->prefixlen + 0x3f) >> 6) * 8;
1127
1128 TAILQ_FOREACH(rdns, &rainfo->rdnss, next) {
1129 packlen += sizeof(struct nd_opt_rdnss);
1130 TAILQ_FOREACH(rdnsa, &rdns->list, next)
1131 packlen += sizeof(rdnsa->addr);
1132 }
1133 TAILQ_FOREACH(dnsl, &rainfo->dnssl, next) {
1134 packlen += sizeof(struct nd_opt_dnssl);
1135 len = 0;
1136 TAILQ_FOREACH(dnsd, &dnsl->list, next)
1137 len += dnsd->len;
1138 len += len % 8 ? 8 - len % 8 : 0;
1139 packlen += len;
1140 }
1141
1142 /* allocate memory for the packet */
1143 if ((buf = realloc(rainfo->ra_data, packlen)) == NULL) {
1144 syslog(LOG_ERR,
1145 "<%s> can't get enough memory for an RA packet %m",
1146 __func__);
1147 exit(1);
1148 }
1149 rainfo->ra_data = buf;
1150 /* XXX: what if packlen > 576? */
1151 rainfo->ra_datalen = packlen;
1152 #define CHECKLEN(size) \
1153 do { \
1154 if (buf + size > rainfo->ra_data + packlen) { \
1155 syslog(LOG_ERR, \
1156 "<%s, %d> RA packet does not fit in %zu",\
1157 __func__, __LINE__, packlen); \
1158 exit(1); \
1159 } \
1160 } while (/*CONSTCOND*/0)
1161 /*
1162 * construct the packet
1163 */
1164 CHECKLEN(sizeof(*ra));
1165 ra = (struct nd_router_advert *)buf;
1166 ra->nd_ra_type = ND_ROUTER_ADVERT;
1167 ra->nd_ra_code = 0;
1168 ra->nd_ra_cksum = 0;
1169 ra->nd_ra_curhoplimit = (uint8_t)(0xff & rainfo->hoplimit);
1170 ra->nd_ra_flags_reserved = 0; /* just in case */
1171 /*
1172 * XXX: the router preference field, which is a 2-bit field, should be
1173 * initialized before other fields.
1174 */
1175 ra->nd_ra_flags_reserved = 0xff & rainfo->rtpref;
1176 ra->nd_ra_flags_reserved |=
1177 rainfo->managedflg ? ND_RA_FLAG_MANAGED : 0;
1178 ra->nd_ra_flags_reserved |=
1179 rainfo->otherflg ? ND_RA_FLAG_OTHER : 0;
1180 ra->nd_ra_router_lifetime = htons(rainfo->lifetime);
1181 ra->nd_ra_reachable = htonl(rainfo->reachabletime);
1182 ra->nd_ra_retransmit = htonl(rainfo->retranstimer);
1183 buf += sizeof(*ra);
1184
1185 if (rainfo->advlinkopt) {
1186 CHECKLEN(sizeof(struct nd_opt_hdr));
1187 lladdropt_fill(rainfo->sdl, (struct nd_opt_hdr *)buf);
1188 buf += lladdroptlen;
1189 }
1190
1191 if (rainfo->linkmtu) {
1192 CHECKLEN(sizeof(*ndopt_mtu));
1193 ndopt_mtu = (struct nd_opt_mtu *)buf;
1194 ndopt_mtu->nd_opt_mtu_type = ND_OPT_MTU;
1195 ndopt_mtu->nd_opt_mtu_len = 1;
1196 ndopt_mtu->nd_opt_mtu_reserved = 0;
1197 ndopt_mtu->nd_opt_mtu_mtu = htonl(rainfo->linkmtu);
1198 buf += sizeof(struct nd_opt_mtu);
1199 }
1200
1201 TAILQ_FOREACH(pfx, &rainfo->prefix, next) {
1202 uint32_t vltime, pltime;
1203 struct timespec now;
1204
1205 CHECKLEN(sizeof(*ndopt_pi));
1206 ndopt_pi = (struct nd_opt_prefix_info *)buf;
1207 ndopt_pi->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
1208 ndopt_pi->nd_opt_pi_len = 4;
1209 ndopt_pi->nd_opt_pi_prefix_len = pfx->prefixlen;
1210 ndopt_pi->nd_opt_pi_flags_reserved = 0;
1211 if (pfx->onlinkflg)
1212 ndopt_pi->nd_opt_pi_flags_reserved |=
1213 ND_OPT_PI_FLAG_ONLINK;
1214 if (pfx->autoconfflg)
1215 ndopt_pi->nd_opt_pi_flags_reserved |=
1216 ND_OPT_PI_FLAG_AUTO;
1217 if (pfx->timer)
1218 vltime = 0;
1219 else {
1220 if (pfx->vltimeexpire || pfx->pltimeexpire)
1221 clock_gettime(CLOCK_MONOTONIC, &now);
1222 if (pfx->vltimeexpire == 0)
1223 vltime = pfx->validlifetime;
1224 else
1225 vltime = (pfx->vltimeexpire > now.tv_sec) ?
1226 pfx->vltimeexpire - now.tv_sec : 0;
1227 }
1228 if (pfx->timer)
1229 pltime = 0;
1230 else {
1231 if (pfx->pltimeexpire == 0)
1232 pltime = pfx->preflifetime;
1233 else
1234 pltime = (pfx->pltimeexpire > now.tv_sec) ?
1235 pfx->pltimeexpire - now.tv_sec : 0;
1236 }
1237 if (vltime < pltime) {
1238 /*
1239 * this can happen if vltime is decrement but pltime
1240 * is not.
1241 */
1242 pltime = vltime;
1243 }
1244 ndopt_pi->nd_opt_pi_valid_time = htonl(vltime);
1245 ndopt_pi->nd_opt_pi_preferred_time = htonl(pltime);
1246 ndopt_pi->nd_opt_pi_reserved2 = 0;
1247 ndopt_pi->nd_opt_pi_prefix = pfx->prefix;
1248
1249 buf += sizeof(struct nd_opt_prefix_info);
1250 }
1251
1252 TAILQ_FOREACH(rti, &rainfo->route, next) {
1253 uint8_t psize = (rti->prefixlen + 0x3f) >> 6;
1254
1255 CHECKLEN(sizeof(*ndopt_rti));
1256 ndopt_rti = (struct nd_opt_route_info *)buf;
1257 ndopt_rti->nd_opt_rti_type = ND_OPT_ROUTE_INFO;
1258 ndopt_rti->nd_opt_rti_len = 1 + psize;
1259 ndopt_rti->nd_opt_rti_prefixlen = rti->prefixlen;
1260 ndopt_rti->nd_opt_rti_flags = 0xff & rti->rtpref;
1261 ndopt_rti->nd_opt_rti_lifetime = htonl(rti->ltime);
1262 memcpy(ndopt_rti + 1, &rti->prefix, psize * 8);
1263 buf += sizeof(struct nd_opt_route_info) + psize * 8;
1264 }
1265
1266 TAILQ_FOREACH(rdns, &rainfo->rdnss, next) {
1267 CHECKLEN(sizeof(*ndopt_rdnss));
1268 ndopt_rdnss = (struct nd_opt_rdnss *)buf;
1269 ndopt_rdnss->nd_opt_rdnss_type = ND_OPT_RDNSS;
1270 ndopt_rdnss->nd_opt_rdnss_len = 1;
1271 ndopt_rdnss->nd_opt_rdnss_reserved = 0;
1272 ndopt_rdnss->nd_opt_rdnss_lifetime = htonl(rdns->lifetime);
1273 buf += sizeof(*ndopt_rdnss);
1274
1275 TAILQ_FOREACH(rdnsa, &rdns->list, next) {
1276 CHECKLEN(sizeof(rdnsa->addr));
1277 memcpy(buf, &rdnsa->addr, sizeof(rdnsa->addr));
1278 ndopt_rdnss->nd_opt_rdnss_len += 2;
1279 buf += sizeof(rdnsa->addr);
1280 }
1281 }
1282
1283 TAILQ_FOREACH(dnsl, &rainfo->dnssl, next) {
1284 CHECKLEN(sizeof(*ndopt_dnssl));
1285 ndopt_dnssl = (struct nd_opt_dnssl *)buf;
1286 ndopt_dnssl->nd_opt_dnssl_type = ND_OPT_DNSSL;
1287 ndopt_dnssl->nd_opt_dnssl_len = 0;
1288 ndopt_dnssl->nd_opt_dnssl_reserved = 0;
1289 ndopt_dnssl->nd_opt_dnssl_lifetime = htonl(dnsl->lifetime);
1290 buf += sizeof(*ndopt_dnssl);
1291
1292 TAILQ_FOREACH(dnsd, &dnsl->list, next) {
1293 CHECKLEN(dnsd->len);
1294 memcpy(buf, dnsd->domain, dnsd->len);
1295 buf += dnsd->len;
1296 }
1297 /* Ensure our length is padded correctly */
1298 len = buf - (char *)ndopt_dnssl;
1299 plen = len % 8 ? 8 - len % 8 : 0;
1300 CHECKLEN(plen);
1301 memset(buf, 0, plen);
1302 buf += plen;
1303 ndopt_dnssl->nd_opt_dnssl_len = (len + plen) / 8;
1304 }
1305 memset(buf, 0, packlen - (buf - rainfo->ra_data));
1306 }
1307
1308 static int
1309 getinet6sysctl(int code)
1310 {
1311 const int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, code };
1312 int value;
1313 size_t size;
1314
1315 size = sizeof(value);
1316 if (sysctl(mib, __arraycount(mib), &value, &size, NULL, 0)
1317 < 0) {
1318 syslog(LOG_ERR, "<%s>: failed to get ip6 sysctl(%d): %m",
1319 __func__, code);
1320 return -1;
1321 }
1322 else
1323 return value;
1324 }
MINIX 3 (repo.or.cz mirror)