2 /* $KAME: config.c,v 1.84 2003/08/05 12:34:23 itojun Exp $ */
5 * Copyright (C) 1998 WIDE Project.
6 * Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/param.h>
35 #include <sys/ioctl.h>
36 #include <sys/socket.h>
39 #include <net/if_var.h>
40 #include <net/route.h>
41 #include <net/if_dl.h>
43 #include <netinet/in.h>
44 #include <netinet/in_var.h>
45 #include <netinet/ip6.h>
46 #include <netinet6/ip6_var.h>
47 #include <netinet/icmp6.h>
48 #include <netinet6/nd6.h>
50 #include <arpa/inet.h>
70 /* label of tcapcode + number + domain name + zero octet */
71 static char entbuf[10 + 3 + NI_MAXHOST + 1];
72 static char oentbuf[10 + 3 + NI_MAXHOST + 1];
73 static char abuf[DNAME_LABELENC_MAXLEN];
75 static time_t prefix_timo = (60 * 120); /* 2 hours.
76 * XXX: should be configurable. */
78 static struct rtadvd_timer *prefix_timeout(void *);
79 static void makeentry(char *, size_t, int, const char *);
80 static size_t dname_labelenc(char *, const char *);
82 /* Encode domain name label encoding in RFC 1035 Section 3.1 */
84 dname_labelenc(char *dst, const char *src)
93 /* Length fields per 63 octets + '\0' (<= DNAME_LABELENC_MAXLEN) */
94 memset(dst, 0, len + len / 64 + 1 + 1);
96 syslog(LOG_DEBUG, "<%s> labelenc = %s", __func__, src);
97 while (src && (len = strlen(src)) != 0) {
98 /* Put a length field with 63 octet limitation first. */
101 *dst++ = len = MIN(63, len);
103 *dst++ = len = MIN(63, p - src);
104 /* Copy 63 octets at most. */
105 memcpy(dst, src, len);
107 if (p == NULL) /* the last label */
111 /* Always need a 0-length label at the tail. */
114 syslog(LOG_DEBUG, "<%s> labellen = %td", __func__, dst - dst_origin);
115 return (dst - dst_origin);
118 #define MUSTHAVE(var, cap) \
121 if ((t = agetnum(cap)) < 0) { \
122 fprintf(stderr, "rtadvd: need %s for interface %s\n", \
129 #define MAYHAVE(var, cap, def) \
131 if ((var = agetnum(cap)) < 0) \
136 loadconfig_index(int idx)
138 char ifname[IFNAMSIZ];
140 syslog(LOG_DEBUG, "<%s> enter", __func__);
142 if (if_indextoname(idx, ifname) != NULL)
143 return (loadconfig_ifname(ifname));
149 loadconfig_ifname(char *ifname)
153 syslog(LOG_DEBUG, "<%s> enter", __func__);
155 update_ifinfo(&ifilist, UPDATE_IFINFO_ALL);
156 TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
157 /* NULL means all IFs will be processed. */
158 if (ifname != NULL &&
159 strcmp(ifi->ifi_ifname, ifname) != 0)
162 if (!ifi->ifi_persist) {
164 "<%s> %s is not a target interface. "
165 "Ignored at this moment.", __func__,
170 if (ifi->ifi_ifindex == 0) {
172 "<%s> %s not found. "
173 "Ignored at this moment.", __func__,
177 if (getconfig(ifi) == NULL) {
179 "<%s> invalid configuration for %s. "
180 "Ignored at this moment.", __func__,
189 rm_ifinfo_index(int idx)
193 ifi = if_indextoifinfo(idx);
195 syslog(LOG_ERR, "<%s>: ifinfo not found (idx=%d)",
200 return (rm_ifinfo(ifi));
204 rm_ifinfo(struct ifinfo *ifi)
208 syslog(LOG_DEBUG, "<%s> enter (%s).", __func__, ifi->ifi_ifname);
209 switch (ifi->ifi_state) {
210 case IFI_STATE_UNCONFIGURED:
214 ifi->ifi_state = IFI_STATE_UNCONFIGURED;
216 "<%s> ifname=%s marked as UNCONFIGURED.",
217 __func__, ifi->ifi_ifname);
219 /* XXX: No MC leaving here because index is disappeared */
221 /* Inactivate timer */
222 rtadvd_remove_timer(ifi->ifi_ra_timer);
223 ifi->ifi_ra_timer = NULL;
228 if (!ifi->ifi_persist) {
229 TAILQ_REMOVE(&ifilist, ifi, ifi_next);
230 syslog(LOG_DEBUG, "<%s>: ifinfo (idx=%d) removed.",
231 __func__, ifi->ifi_ifindex);
233 /* recreate an empty entry */
234 update_persist_ifinfo(&ifilist, ifi->ifi_ifname);
235 syslog(LOG_DEBUG, "<%s>: ifname=%s is persistent.",
236 __func__, ifi->ifi_ifname);
239 /* clean up rai if any */
240 switch (ifi->ifi_state) {
241 case IFI_STATE_CONFIGURED:
242 if (ifi->ifi_rainfo != NULL) {
243 error = rm_rainfo(ifi->ifi_rainfo);
246 ifi->ifi_rainfo = NULL;
249 case IFI_STATE_TRANSITIVE:
250 if (ifi->ifi_rainfo == ifi->ifi_rainfo_trans) {
251 if (ifi->ifi_rainfo != NULL) {
252 error = rm_rainfo(ifi->ifi_rainfo);
255 ifi->ifi_rainfo = NULL;
256 ifi->ifi_rainfo_trans = NULL;
259 if (ifi->ifi_rainfo != NULL) {
260 error = rm_rainfo(ifi->ifi_rainfo);
263 ifi->ifi_rainfo = NULL;
265 if (ifi->ifi_rainfo_trans != NULL) {
266 error = rm_rainfo(ifi->ifi_rainfo_trans);
269 ifi->ifi_rainfo_trans = NULL;
274 syslog(LOG_DEBUG, "<%s> leave (%s).", __func__, ifi->ifi_ifname);
275 if (!ifi->ifi_persist)
281 rm_rainfo(struct rainfo *rai)
284 struct soliciter *sol;
286 struct rdnss_addr *rdna;
290 syslog(LOG_DEBUG, "<%s>: enter", __func__);
292 TAILQ_REMOVE(&railist, rai, rai_next);
293 if (rai->rai_ifinfo != NULL)
294 syslog(LOG_DEBUG, "<%s>: rainfo (idx=%d) removed.",
295 __func__, rai->rai_ifinfo->ifi_ifindex);
297 if (rai->rai_ra_data != NULL)
298 free(rai->rai_ra_data);
300 while ((pfx = TAILQ_FIRST(&rai->rai_prefix)) != NULL)
302 while ((sol = TAILQ_FIRST(&rai->rai_soliciter)) != NULL) {
303 TAILQ_REMOVE(&rai->rai_soliciter, sol, sol_next);
306 while ((rdn = TAILQ_FIRST(&rai->rai_rdnss)) != NULL) {
307 TAILQ_REMOVE(&rai->rai_rdnss, rdn, rd_next);
308 while ((rdna = TAILQ_FIRST(&rdn->rd_list)) != NULL) {
309 TAILQ_REMOVE(&rdn->rd_list, rdna, ra_next);
314 while ((dns = TAILQ_FIRST(&rai->rai_dnssl)) != NULL) {
315 TAILQ_REMOVE(&rai->rai_dnssl, dns, dn_next);
318 while ((rti = TAILQ_FIRST(&rai->rai_route)) != NULL) {
319 TAILQ_REMOVE(&rai->rai_route, rti, rti_next);
323 syslog(LOG_DEBUG, "<%s>: leave", __func__);
329 getconfig(struct ifinfo *ifi)
335 struct rainfo *rai_old;
340 char *addr, *flagstr;
342 if (ifi == NULL) /* if does not exist */
345 if (ifi->ifi_state == IFI_STATE_TRANSITIVE &&
346 ifi->ifi_rainfo == NULL) {
347 syslog(LOG_INFO, "<%s> %s is shutting down. Skipped.",
348 __func__, ifi->ifi_ifname);
352 if ((stat = agetent(tbuf, ifi->ifi_ifname)) <= 0) {
353 memset(tbuf, 0, sizeof(tbuf));
355 "<%s> %s isn't defined in the configuration file"
356 " or the configuration file doesn't exist."
357 " Treat it as default",
358 __func__, ifi->ifi_ifname);
361 ELM_MALLOC(rai, exit(1));
362 TAILQ_INIT(&rai->rai_prefix);
363 TAILQ_INIT(&rai->rai_route);
364 TAILQ_INIT(&rai->rai_rdnss);
365 TAILQ_INIT(&rai->rai_dnssl);
366 TAILQ_INIT(&rai->rai_soliciter);
367 rai->rai_ifinfo = ifi;
369 /* gather on-link prefixes from the network interfaces. */
370 if (agetflag("noifprefix"))
371 rai->rai_advifprefix = 0;
373 rai->rai_advifprefix = 1;
375 /* get interface information */
376 if (agetflag("nolladdr"))
377 rai->rai_advlinkopt = 0;
379 rai->rai_advlinkopt = 1;
380 if (rai->rai_advlinkopt) {
381 if (ifi->ifi_sdl.sdl_type == 0) {
383 "<%s> can't get information of %s",
384 __func__, ifi->ifi_ifname);
385 goto getconfig_free_rai;
390 * set router configuration variables.
392 MAYHAVE(val, "maxinterval", DEF_MAXRTRADVINTERVAL);
393 if (val < MIN_MAXINTERVAL || val > MAX_MAXINTERVAL) {
395 "<%s> maxinterval (%" PRIu32 ") on %s is invalid "
396 "(must be between %u and %u)", __func__, val,
397 ifi->ifi_ifname, MIN_MAXINTERVAL, MAX_MAXINTERVAL);
398 goto getconfig_free_rai;
400 rai->rai_maxinterval = (uint16_t)val;
402 MAYHAVE(val, "mininterval", rai->rai_maxinterval/3);
403 if ((uint16_t)val < MIN_MININTERVAL ||
404 (uint16_t)val > (rai->rai_maxinterval * 3) / 4) {
406 "<%s> mininterval (%" PRIu32 ") on %s is invalid "
407 "(must be between %d and %d)",
408 __func__, val, ifi->ifi_ifname, MIN_MININTERVAL,
409 (rai->rai_maxinterval * 3) / 4);
410 goto getconfig_free_rai;
412 rai->rai_mininterval = (uint16_t)val;
414 MAYHAVE(val, "chlim", DEF_ADVCURHOPLIMIT);
415 rai->rai_hoplimit = val & 0xff;
417 if ((flagstr = (char *)agetstr("raflags", &bp))) {
419 if (strchr(flagstr, 'm'))
420 val |= ND_RA_FLAG_MANAGED;
421 if (strchr(flagstr, 'o'))
422 val |= ND_RA_FLAG_OTHER;
423 if (strchr(flagstr, 'h'))
424 val |= ND_RA_FLAG_RTPREF_HIGH;
425 if (strchr(flagstr, 'l')) {
426 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
427 syslog(LOG_ERR, "<%s> the \'h\' and \'l\'"
428 " router flags are exclusive", __func__);
429 goto getconfig_free_rai;
431 val |= ND_RA_FLAG_RTPREF_LOW;
434 MAYHAVE(val, "raflags", 0);
436 rai->rai_managedflg = val & ND_RA_FLAG_MANAGED;
437 rai->rai_otherflg = val & ND_RA_FLAG_OTHER;
438 #ifndef ND_RA_FLAG_RTPREF_MASK
439 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
440 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
442 rai->rai_rtpref = val & ND_RA_FLAG_RTPREF_MASK;
443 if (rai->rai_rtpref == ND_RA_FLAG_RTPREF_RSV) {
444 syslog(LOG_ERR, "<%s> invalid router preference (%02x) on %s",
445 __func__, rai->rai_rtpref, ifi->ifi_ifname);
446 goto getconfig_free_rai;
449 MAYHAVE(val, "rltime", rai->rai_maxinterval * 3);
450 if ((uint16_t)val && ((uint16_t)val < rai->rai_maxinterval ||
451 (uint16_t)val > MAXROUTERLIFETIME)) {
453 "<%s> router lifetime (%" PRIu32 ") on %s is invalid "
454 "(must be 0 or between %d and %d)",
455 __func__, val, ifi->ifi_ifname, rai->rai_maxinterval,
457 goto getconfig_free_rai;
459 rai->rai_lifetime = val & 0xffff;
461 MAYHAVE(val, "rtime", DEF_ADVREACHABLETIME);
462 if (val < 0 || val > MAXREACHABLETIME) {
464 "<%s> reachable time (%" PRIu32 ") on %s is invalid "
465 "(must be no greater than %d)",
466 __func__, val, ifi->ifi_ifname, MAXREACHABLETIME);
467 goto getconfig_free_rai;
469 rai->rai_reachabletime = (uint32_t)val;
471 MAYHAVE(val64, "retrans", DEF_ADVRETRANSTIMER);
472 if (val64 < 0 || val64 > 0xffffffff) {
473 syslog(LOG_ERR, "<%s> retrans time (%" PRIu64 ") on %s out of range",
474 __func__, val64, ifi->ifi_ifname);
475 goto getconfig_free_rai;
477 rai->rai_retranstimer = (uint32_t)val64;
479 if (agetnum("hapref") != -1 || agetnum("hatime") != -1) {
481 "<%s> mobile-ip6 configuration not supported",
483 goto getconfig_free_rai;
485 /* prefix information */
488 * This is an implementation specific parameter to consider
489 * link propagation delays and poorly synchronized clocks when
490 * checking consistency of advertised lifetimes.
492 MAYHAVE(val, "clockskew", 0);
493 rai->rai_clockskew = val;
496 for (i = -1; i < MAXPREFIX; i++) {
499 makeentry(entbuf, sizeof(entbuf), i, "addr");
500 addr = (char *)agetstr(entbuf, &bp);
504 /* allocate memory to store prefix information */
505 ELM_MALLOC(pfx, exit(1));
506 pfx->pfx_rainfo = rai;
507 pfx->pfx_origin = PREFIX_FROM_CONFIG;
509 if (inet_pton(AF_INET6, addr, &pfx->pfx_prefix) != 1) {
511 "<%s> inet_pton failed for %s",
513 goto getconfig_free_pfx;
515 if (IN6_IS_ADDR_MULTICAST(&pfx->pfx_prefix)) {
517 "<%s> multicast prefix (%s) must "
518 "not be advertised on %s",
519 __func__, addr, ifi->ifi_ifname);
520 goto getconfig_free_pfx;
522 if (IN6_IS_ADDR_LINKLOCAL(&pfx->pfx_prefix))
524 "<%s> link-local prefix (%s) will be"
526 __func__, addr, ifi->ifi_ifname);
528 makeentry(entbuf, sizeof(entbuf), i, "prefixlen");
529 MAYHAVE(val, entbuf, 64);
530 if (val < 0 || val > 128) {
531 syslog(LOG_ERR, "<%s> prefixlen (%" PRIu32 ") for %s "
532 "on %s out of range",
533 __func__, val, addr, ifi->ifi_ifname);
534 goto getconfig_free_pfx;
536 pfx->pfx_prefixlen = (int)val;
538 makeentry(entbuf, sizeof(entbuf), i, "pinfoflags");
539 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
541 if (strchr(flagstr, 'l'))
542 val |= ND_OPT_PI_FLAG_ONLINK;
543 if (strchr(flagstr, 'a'))
544 val |= ND_OPT_PI_FLAG_AUTO;
547 (ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO));
549 pfx->pfx_onlinkflg = val & ND_OPT_PI_FLAG_ONLINK;
550 pfx->pfx_autoconfflg = val & ND_OPT_PI_FLAG_AUTO;
552 makeentry(entbuf, sizeof(entbuf), i, "vltime");
553 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
554 if (val64 < 0 || val64 > 0xffffffff) {
555 syslog(LOG_ERR, "<%s> vltime (%" PRIu64 ") for "
556 "%s/%d on %s is out of range",
558 addr, pfx->pfx_prefixlen, ifi->ifi_ifname);
559 goto getconfig_free_pfx;
561 pfx->pfx_validlifetime = (uint32_t)val64;
563 makeentry(entbuf, sizeof(entbuf), i, "vltimedecr");
564 if (agetflag(entbuf)) {
567 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
568 pfx->pfx_vltimeexpire =
569 now.tv_sec + pfx->pfx_validlifetime;
572 makeentry(entbuf, sizeof(entbuf), i, "pltime");
573 MAYHAVE(val64, entbuf, DEF_ADVPREFERREDLIFETIME);
574 if (val64 < 0 || val64 > 0xffffffff) {
576 "<%s> pltime (%" PRIu64 ") for %s/%d on %s "
579 addr, pfx->pfx_prefixlen, ifi->ifi_ifname);
580 goto getconfig_free_pfx;
582 pfx->pfx_preflifetime = (uint32_t)val64;
584 makeentry(entbuf, sizeof(entbuf), i, "pltimedecr");
585 if (agetflag(entbuf)) {
588 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
589 pfx->pfx_pltimeexpire =
590 now.tv_sec + pfx->pfx_preflifetime;
592 /* link into chain */
593 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
599 if (rai->rai_advifprefix && rai->rai_pfxs == 0)
602 MAYHAVE(val64, "mtu", 0);
603 if (val < 0 || val64 > 0xffffffff) {
605 "<%s> mtu (%" PRIu64 ") on %s out of range",
606 __func__, val64, ifi->ifi_ifname);
607 goto getconfig_free_rai;
609 rai->rai_linkmtu = (uint32_t)val64;
610 if (rai->rai_linkmtu == 0) {
613 if ((mtustr = (char *)agetstr("mtu", &bp)) &&
614 strcmp(mtustr, "auto") == 0)
615 rai->rai_linkmtu = ifi->ifi_phymtu;
617 else if (rai->rai_linkmtu < IPV6_MMTU ||
618 rai->rai_linkmtu > ifi->ifi_phymtu) {
620 "<%s> advertised link mtu (%" PRIu32 ") on %s is invalid (must "
621 "be between least MTU (%d) and physical link MTU (%d)",
622 __func__, rai->rai_linkmtu, ifi->ifi_ifname,
623 IPV6_MMTU, ifi->ifi_phymtu);
624 goto getconfig_free_rai;
627 #ifdef SIOCSIFINFO_IN6
629 struct in6_ndireq ndi;
632 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
633 syslog(LOG_ERR, "<%s> socket: %s", __func__,
637 memset(&ndi, 0, sizeof(ndi));
638 strlcpy(ndi.ifname, ifi->ifi_ifname, sizeof(ndi.ifname));
639 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&ndi) < 0)
640 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFINFO_IN6 at %s: %s",
641 __func__, ifi->ifi_ifname, strerror(errno));
643 /* reflect the RA info to the host variables in kernel */
644 ndi.ndi.chlim = rai->rai_hoplimit;
645 ndi.ndi.retrans = rai->rai_retranstimer;
646 ndi.ndi.basereachable = rai->rai_reachabletime;
647 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&ndi) < 0)
648 syslog(LOG_INFO, "<%s> ioctl:SIOCSIFINFO_IN6 at %s: %s",
649 __func__, ifi->ifi_ifname, strerror(errno));
655 /* route information */
657 for (i = -1; i < MAXROUTE; i++) {
660 makeentry(entbuf, sizeof(entbuf), i, "rtprefix");
661 addr = (char *)agetstr(entbuf, &bp);
663 makeentry(oentbuf, sizeof(oentbuf), i, "rtrprefix");
664 addr = (char *)agetstr(oentbuf, &bp);
666 fprintf(stderr, "%s was obsoleted. Use %s.\n",
672 /* allocate memory to store prefix information */
673 ELM_MALLOC(rti, exit(1));
675 if (inet_pton(AF_INET6, addr, &rti->rti_prefix) != 1) {
676 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
678 goto getconfig_free_rti;
682 * XXX: currently there's no restriction in route information
683 * prefix according to
684 * draft-ietf-ipngwg-router-selection-00.txt.
685 * However, I think the similar restriction be necessary.
687 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
688 if (IN6_IS_ADDR_MULTICAST(&rti->prefix)) {
690 "<%s> multicast route (%s) must "
691 "not be advertised on %s",
692 __func__, addr, ifi->ifi_ifname);
693 goto getconfig_free_rti;
695 if (IN6_IS_ADDR_LINKLOCAL(&rti->prefix)) {
697 "<%s> link-local route (%s) will "
698 "be advertised on %s",
699 __func__, addr, ifi->ifi_ifname);
700 goto getconfig_free_rti;
704 makeentry(entbuf, sizeof(entbuf), i, "rtplen");
705 /* XXX: 256 is a magic number for compatibility check. */
706 MAYHAVE(val, entbuf, 256);
708 makeentry(oentbuf, sizeof(oentbuf), i, "rtrplen");
709 MAYHAVE(val, oentbuf, 256);
711 fprintf(stderr, "%s was obsoleted. Use %s.\n",
716 if (val < 0 || val > 128) {
717 syslog(LOG_ERR, "<%s> prefixlen (%" PRIu32 ") for %s on %s "
719 __func__, val, addr, ifi->ifi_ifname);
720 goto getconfig_free_rti;
722 rti->rti_prefixlen = (int)val;
724 makeentry(entbuf, sizeof(entbuf), i, "rtflags");
725 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
727 if (strchr(flagstr, 'h'))
728 val |= ND_RA_FLAG_RTPREF_HIGH;
729 if (strchr(flagstr, 'l')) {
730 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
732 "<%s> the \'h\' and \'l\' route"
733 " preferences are exclusive",
735 goto getconfig_free_rti;
737 val |= ND_RA_FLAG_RTPREF_LOW;
740 MAYHAVE(val, entbuf, 256); /* XXX */
742 makeentry(oentbuf, sizeof(oentbuf), i, "rtrflags");
743 MAYHAVE(val, oentbuf, 256);
745 fprintf(stderr, "%s was obsoleted. Use %s.\n",
750 rti->rti_rtpref = val & ND_RA_FLAG_RTPREF_MASK;
751 if (rti->rti_rtpref == ND_RA_FLAG_RTPREF_RSV) {
752 syslog(LOG_ERR, "<%s> invalid route preference (%02x) "
754 __func__, rti->rti_rtpref, addr,
755 rti->rti_prefixlen, ifi->ifi_ifname);
756 goto getconfig_free_rti;
760 * Since the spec does not a default value, we should make
761 * this entry mandatory. However, FreeBSD 4.4 has shipped
762 * with this field being optional, we use the router lifetime
763 * as an ad-hoc default value with a warning message.
765 makeentry(entbuf, sizeof(entbuf), i, "rtltime");
766 MAYHAVE(val64, entbuf, -1);
768 makeentry(oentbuf, sizeof(oentbuf), i, "rtrltime");
769 MAYHAVE(val64, oentbuf, -1);
771 fprintf(stderr, "%s was obsoleted. Use %s.\n",
774 fprintf(stderr, "%s should be specified "
775 "for interface %s.\n", entbuf,
777 val64 = rai->rai_lifetime;
780 if (val64 < 0 || val64 > 0xffffffff) {
781 syslog(LOG_ERR, "<%s> route lifetime (%" PRIu64 ") for "
782 "%s/%d on %s out of range", __func__,
783 val64, addr, rti->rti_prefixlen,
785 goto getconfig_free_rti;
787 rti->rti_ltime = (uint32_t)val64;
789 /* link into chain */
790 TAILQ_INSERT_TAIL(&rai->rai_route, rti, rti_next);
797 /* DNS server and DNS search list information */
798 for (i = -1; i < MAXRDNSSENT ; i++) {
800 struct rdnss_addr *rdna;
804 makeentry(entbuf, sizeof(entbuf), i, "rdnss");
805 addr = (char *)agetstr(entbuf, &bp);
808 ELM_MALLOC(rdn, exit(1));
810 TAILQ_INIT(&rdn->rd_list);
812 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
813 c = strcspn(ap, ",");
814 strncpy(abuf, ap, c);
816 ELM_MALLOC(rdna, goto getconfig_free_rdn);
817 if (inet_pton(AF_INET6, abuf, &rdna->ra_dns) != 1) {
818 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
821 goto getconfig_free_rdn;
823 TAILQ_INSERT_TAIL(&rdn->rd_list, rdna, ra_next);
826 makeentry(entbuf, sizeof(entbuf), i, "rdnssltime");
827 MAYHAVE(val, entbuf, (rai->rai_maxinterval * 3 / 2));
828 if ((uint16_t)val < rai->rai_maxinterval ||
829 (uint16_t)val > rai->rai_maxinterval * 2) {
830 syslog(LOG_ERR, "%s (%" PRIu16 ") on %s is invalid "
831 "(must be between %d and %d)",
832 entbuf, val, ifi->ifi_ifname, rai->rai_maxinterval,
833 rai->rai_maxinterval * 2);
834 goto getconfig_free_rdn;
838 /* link into chain */
839 TAILQ_INSERT_TAIL(&rai->rai_rdnss, rdn, rd_next);
842 while ((rdna = TAILQ_FIRST(&rdn->rd_list)) != NULL) {
843 TAILQ_REMOVE(&rdn->rd_list, rdna, ra_next);
849 for (i = -1; i < MAXDNSSLENT ; i++) {
851 struct dnssl_addr *dnsa;
855 makeentry(entbuf, sizeof(entbuf), i, "dnssl");
856 addr = (char *)agetstr(entbuf, &bp);
860 ELM_MALLOC(dns, exit(1));
862 TAILQ_INIT(&dns->dn_list);
864 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
865 c = strcspn(ap, ",");
866 strncpy(abuf, ap, c);
868 ELM_MALLOC(dnsa, goto getconfig_free_dns);
869 dnsa->da_len = dname_labelenc(dnsa->da_dom, abuf);
870 syslog(LOG_DEBUG, "<%s>: dnsa->da_len = %d", __func__,
872 TAILQ_INSERT_TAIL(&dns->dn_list, dnsa, da_next);
875 makeentry(entbuf, sizeof(entbuf), i, "dnsslltime");
876 MAYHAVE(val, entbuf, (rai->rai_maxinterval * 3 / 2));
877 if ((uint16_t)val < rai->rai_maxinterval ||
878 (uint16_t)val > rai->rai_maxinterval * 2) {
879 syslog(LOG_ERR, "%s (%" PRIu16 ") on %s is invalid "
880 "(must be between %d and %d)",
881 entbuf, val, ifi->ifi_ifname, rai->rai_maxinterval,
882 rai->rai_maxinterval * 2);
883 goto getconfig_free_dns;
887 /* link into chain */
888 TAILQ_INSERT_TAIL(&rai->rai_dnssl, dns, dn_next);
891 while ((dnsa = TAILQ_FIRST(&dns->dn_list)) != NULL) {
892 TAILQ_REMOVE(&dns->dn_list, dnsa, da_next);
897 /* construct the sending packet */
901 * If an entry with the same ifindex exists, remove it first.
902 * Before the removal, RDNSS and DNSSL options with
903 * zero-lifetime will be sent.
905 switch (ifi->ifi_state) {
906 case IFI_STATE_UNCONFIGURED:
907 /* UNCONFIGURED -> TRANSITIVE */
909 error = sock_mc_join(&sock, ifi->ifi_ifindex);
913 ifi->ifi_state = IFI_STATE_TRANSITIVE;
914 ifi->ifi_burstcount = MAX_INITIAL_RTR_ADVERTISEMENTS;
915 ifi->ifi_burstinterval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
917 /* The same two rai mean initial burst */
918 ifi->ifi_rainfo = rai;
919 ifi->ifi_rainfo_trans = rai;
920 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
922 if (ifi->ifi_ra_timer == NULL)
923 ifi->ifi_ra_timer = rtadvd_add_timer(ra_timeout,
924 ra_timer_update, ifi, ifi);
925 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
926 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
930 "<%s> ifname=%s marked as TRANSITIVE (initial burst).",
931 __func__, ifi->ifi_ifname);
933 case IFI_STATE_CONFIGURED:
934 /* CONFIGURED -> TRANSITIVE */
935 rai_old = ifi->ifi_rainfo;
936 if (rai_old == NULL) {
938 "<%s> ifi_rainfo is NULL"
939 " in IFI_STATE_CONFIGURED.", __func__);
946 rai_old->rai_lifetime = 0;
947 TAILQ_FOREACH(rdn, &rai_old->rai_rdnss, rd_next)
949 TAILQ_FOREACH(dns, &rai_old->rai_dnssl, dn_next)
952 ifi->ifi_rainfo_trans = rai_old;
953 ifi->ifi_state = IFI_STATE_TRANSITIVE;
954 ifi->ifi_burstcount = MAX_FINAL_RTR_ADVERTISEMENTS;
955 ifi->ifi_burstinterval = MIN_DELAY_BETWEEN_RAS;
957 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
958 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
962 "<%s> ifname=%s marked as TRANSITIVE"
963 " (transitional burst)",
964 __func__, ifi->ifi_ifname);
966 ifi->ifi_rainfo = rai;
967 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
969 case IFI_STATE_TRANSITIVE:
970 if (ifi->ifi_rainfo != NULL) {
971 if (ifi->ifi_rainfo == ifi->ifi_rainfo_trans) {
972 /* Reinitialize initial burst */
973 rm_rainfo(ifi->ifi_rainfo);
974 ifi->ifi_rainfo = rai;
975 ifi->ifi_rainfo_trans = rai;
976 ifi->ifi_burstcount =
977 MAX_INITIAL_RTR_ADVERTISEMENTS;
978 ifi->ifi_burstinterval =
979 MAX_INITIAL_RTR_ADVERT_INTERVAL;
981 /* Replace ifi_rainfo with the new one */
982 rm_rainfo(ifi->ifi_rainfo);
983 ifi->ifi_rainfo = rai;
985 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
987 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
988 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
991 /* XXX: NOTREACHED. Being shut down. */
993 "<%s> %s is shutting down. Skipped.",
994 __func__, ifi->ifi_ifname);
1010 get_prefix(struct rainfo *rai)
1012 struct ifaddrs *ifap, *ifa;
1016 char *p, *ep, *m, *lim;
1017 char ntopbuf[INET6_ADDRSTRLEN];
1019 if (getifaddrs(&ifap) < 0) {
1021 "<%s> can't get interface addresses",
1025 ifi = rai->rai_ifinfo;
1027 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1030 if (strcmp(ifa->ifa_name, ifi->ifi_ifname) != 0)
1032 if (ifa->ifa_addr->sa_family != AF_INET6)
1034 a = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1035 if (IN6_IS_ADDR_LINKLOCAL(a))
1038 /* get prefix length */
1039 m = (char *)&((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1040 lim = (char *)(ifa->ifa_netmask) + ifa->ifa_netmask->sa_len;
1041 plen = prefixlen(m, lim);
1042 if (plen <= 0 || plen > 128) {
1043 syslog(LOG_ERR, "<%s> failed to get prefixlen "
1044 "or prefix is invalid",
1048 if (plen == 128) /* XXX */
1050 if (find_prefix(rai, a, plen)) {
1051 /* ignore a duplicated prefix. */
1055 /* allocate memory to store prefix info. */
1056 ELM_MALLOC(pfx, exit(1));
1058 /* set prefix, sweep bits outside of prefixlen */
1059 pfx->pfx_prefixlen = plen;
1060 memcpy(&pfx->pfx_prefix, a, sizeof(*a));
1061 p = (char *)&pfx->pfx_prefix;
1062 ep = (char *)(&pfx->pfx_prefix + 1);
1063 while (m < lim && p < ep)
1067 if (!inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1069 syslog(LOG_ERR, "<%s> inet_ntop failed", __func__);
1073 "<%s> add %s/%d to prefix list on %s",
1074 __func__, ntopbuf, pfx->pfx_prefixlen, ifi->ifi_ifname);
1076 /* set other fields with protocol defaults */
1077 pfx->pfx_validlifetime = DEF_ADVVALIDLIFETIME;
1078 pfx->pfx_preflifetime = DEF_ADVPREFERREDLIFETIME;
1079 pfx->pfx_onlinkflg = 1;
1080 pfx->pfx_autoconfflg = 1;
1081 pfx->pfx_origin = PREFIX_FROM_KERNEL;
1082 pfx->pfx_rainfo = rai;
1084 /* link into chain */
1085 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
1087 /* counter increment */
1095 makeentry(char *buf, size_t len, int id, const char *string)
1099 strlcpy(buf, string, len);
1101 snprintf(buf, len, "%s%d", string, id);
1105 * Add a prefix to the list of specified interface and reconstruct
1106 * the outgoing packet.
1107 * The prefix must not be in the list.
1108 * XXX: other parameters of the prefix (e.g. lifetime) should be
1109 * able to be specified.
1112 add_prefix(struct rainfo *rai, struct in6_prefixreq *ipr)
1116 char ntopbuf[INET6_ADDRSTRLEN];
1118 ifi = rai->rai_ifinfo;
1119 ELM_MALLOC(pfx, return);
1120 pfx->pfx_prefix = ipr->ipr_prefix.sin6_addr;
1121 pfx->pfx_prefixlen = ipr->ipr_plen;
1122 pfx->pfx_validlifetime = ipr->ipr_vltime;
1123 pfx->pfx_preflifetime = ipr->ipr_pltime;
1124 pfx->pfx_onlinkflg = ipr->ipr_raf_onlink;
1125 pfx->pfx_autoconfflg = ipr->ipr_raf_auto;
1126 pfx->pfx_origin = PREFIX_FROM_DYNAMIC;
1127 pfx->pfx_rainfo = rai;
1129 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
1131 syslog(LOG_DEBUG, "<%s> new prefix %s/%d was added on %s",
1133 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1134 sizeof(ntopbuf)), ipr->ipr_plen, ifi->ifi_ifname);
1140 * Delete a prefix to the list of specified interface and reconstruct
1141 * the outgoing packet.
1142 * The prefix must be in the list.
1145 delete_prefix(struct prefix *pfx)
1149 char ntopbuf[INET6_ADDRSTRLEN];
1151 rai = pfx->pfx_rainfo;
1152 ifi = rai->rai_ifinfo;
1153 TAILQ_REMOVE(&rai->rai_prefix, pfx, pfx_next);
1154 syslog(LOG_DEBUG, "<%s> prefix %s/%d was deleted on %s",
1156 inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1157 sizeof(ntopbuf)), pfx->pfx_prefixlen, ifi->ifi_ifname);
1159 rtadvd_remove_timer(pfx->pfx_timer);
1166 invalidate_prefix(struct prefix *pfx)
1168 struct timespec timo;
1171 char ntopbuf[INET6_ADDRSTRLEN];
1173 rai = pfx->pfx_rainfo;
1174 ifi = rai->rai_ifinfo;
1175 if (pfx->pfx_timer) { /* sanity check */
1177 "<%s> assumption failure: timer already exists",
1182 syslog(LOG_DEBUG, "<%s> prefix %s/%d was invalidated on %s, "
1183 "will expire in %ld seconds", __func__,
1184 inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf, sizeof(ntopbuf)),
1185 pfx->pfx_prefixlen, ifi->ifi_ifname, (long)prefix_timo);
1187 /* set the expiration timer */
1188 pfx->pfx_timer = rtadvd_add_timer(prefix_timeout, NULL, pfx, NULL);
1189 if (pfx->pfx_timer == NULL) {
1190 syslog(LOG_ERR, "<%s> failed to add a timer for a prefix. "
1191 "remove the prefix", __func__);
1194 timo.tv_sec = prefix_timo;
1196 rtadvd_set_timer(&timo, pfx->pfx_timer);
1199 static struct rtadvd_timer *
1200 prefix_timeout(void *arg)
1203 delete_prefix((struct prefix *)arg);
1209 update_prefix(struct prefix *pfx)
1213 char ntopbuf[INET6_ADDRSTRLEN];
1215 rai = pfx->pfx_rainfo;
1216 ifi = rai->rai_ifinfo;
1217 if (pfx->pfx_timer == NULL) { /* sanity check */
1219 "<%s> assumption failure: timer does not exist",
1224 syslog(LOG_DEBUG, "<%s> prefix %s/%d was re-enabled on %s",
1225 __func__, inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1226 sizeof(ntopbuf)), pfx->pfx_prefixlen, ifi->ifi_ifname);
1228 /* stop the expiration timer */
1229 rtadvd_remove_timer(pfx->pfx_timer);
1230 pfx->pfx_timer = NULL;
1234 * Try to get an in6_prefixreq contents for a prefix which matches
1235 * ipr->ipr_prefix and ipr->ipr_plen and belongs to
1236 * the interface whose name is ipr->ipr_name[].
1239 init_prefix(struct in6_prefixreq *ipr)
1244 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1245 syslog(LOG_ERR, "<%s> socket: %s", __func__,
1250 if (ioctl(s, SIOCGIFPREFIX_IN6, (caddr_t)ipr) < 0) {
1251 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFPREFIX %s", __func__,
1254 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1255 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1256 ipr->ipr_raf_onlink = 1;
1257 ipr->ipr_raf_auto = 1;
1258 /* omit other field initialization */
1260 else if (ipr->ipr_origin < PR_ORIG_RR) {
1261 char ntopbuf[INET6_ADDRSTRLEN];
1263 syslog(LOG_WARNING, "<%s> Added prefix(%s)'s origin %d is"
1264 "lower than PR_ORIG_RR(router renumbering)."
1265 "This should not happen if I am router", __func__,
1266 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1267 sizeof(ntopbuf)), ipr->ipr_origin);
1275 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1276 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1277 ipr->ipr_raf_onlink = 1;
1278 ipr->ipr_raf_auto = 1;
1284 make_prefix(struct rainfo *rai, int ifindex, struct in6_addr *addr, int plen)
1286 struct in6_prefixreq ipr;
1288 memset(&ipr, 0, sizeof(ipr));
1289 if (if_indextoname(ifindex, ipr.ipr_name) == NULL) {
1290 syslog(LOG_ERR, "<%s> Prefix added interface No.%d doesn't "
1291 "exist. This should not happen! %s", __func__,
1292 ifindex, strerror(errno));
1295 ipr.ipr_prefix.sin6_len = sizeof(ipr.ipr_prefix);
1296 ipr.ipr_prefix.sin6_family = AF_INET6;
1297 ipr.ipr_prefix.sin6_addr = *addr;
1298 ipr.ipr_plen = plen;
1300 if (init_prefix(&ipr))
1301 return; /* init failed by some error */
1302 add_prefix(rai, &ipr);
1306 make_packet(struct rainfo *rai)
1308 size_t packlen, lladdroptlen = 0;
1310 struct nd_router_advert *ra;
1311 struct nd_opt_prefix_info *ndopt_pi;
1312 struct nd_opt_mtu *ndopt_mtu;
1313 struct nd_opt_route_info *ndopt_rti;
1315 struct nd_opt_rdnss *ndopt_rdnss;
1317 struct nd_opt_dnssl *ndopt_dnssl;
1323 ifi = rai->rai_ifinfo;
1324 /* calculate total length */
1325 packlen = sizeof(struct nd_router_advert);
1326 if (rai->rai_advlinkopt) {
1327 if ((lladdroptlen = lladdropt_length(&ifi->ifi_sdl)) == 0) {
1329 "<%s> link-layer address option has"
1330 " null length on %s. Treat as not included.",
1331 __func__, ifi->ifi_ifname);
1332 rai->rai_advlinkopt = 0;
1334 packlen += lladdroptlen;
1337 packlen += sizeof(struct nd_opt_prefix_info) * rai->rai_pfxs;
1338 if (rai->rai_linkmtu)
1339 packlen += sizeof(struct nd_opt_mtu);
1341 TAILQ_FOREACH(rti, &rai->rai_route, rti_next)
1342 packlen += sizeof(struct nd_opt_route_info) +
1343 ((rti->rti_prefixlen + 0x3f) >> 6) * 8;
1345 TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
1346 struct rdnss_addr *rdna;
1348 packlen += sizeof(struct nd_opt_rdnss);
1349 TAILQ_FOREACH(rdna, &rdn->rd_list, ra_next)
1350 packlen += sizeof(rdna->ra_dns);
1352 TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
1353 struct dnssl_addr *dnsa;
1355 packlen += sizeof(struct nd_opt_dnssl);
1357 TAILQ_FOREACH(dnsa, &dns->dn_list, da_next)
1358 len += dnsa->da_len;
1360 /* A zero octet and 8 octet boundary */
1362 len += (len % 8) ? 8 - len % 8 : 0;
1366 /* allocate memory for the packet */
1367 if ((buf = malloc(packlen)) == NULL) {
1369 "<%s> can't get enough memory for an RA packet",
1373 memset(buf, 0, packlen);
1374 if (rai->rai_ra_data) /* Free old data if any. */
1375 free(rai->rai_ra_data);
1376 rai->rai_ra_data = buf;
1377 /* XXX: what if packlen > 576? */
1378 rai->rai_ra_datalen = packlen;
1381 * construct the packet
1383 ra = (struct nd_router_advert *)buf;
1384 ra->nd_ra_type = ND_ROUTER_ADVERT;
1386 ra->nd_ra_cksum = 0;
1387 ra->nd_ra_curhoplimit = (uint8_t)(0xff & rai->rai_hoplimit);
1388 ra->nd_ra_flags_reserved = 0; /* just in case */
1390 * XXX: the router preference field, which is a 2-bit field, should be
1391 * initialized before other fields.
1393 ra->nd_ra_flags_reserved = 0xff & rai->rai_rtpref;
1394 ra->nd_ra_flags_reserved |=
1395 rai->rai_managedflg ? ND_RA_FLAG_MANAGED : 0;
1396 ra->nd_ra_flags_reserved |=
1397 rai->rai_otherflg ? ND_RA_FLAG_OTHER : 0;
1398 ra->nd_ra_router_lifetime = htons(rai->rai_lifetime);
1399 ra->nd_ra_reachable = htonl(rai->rai_reachabletime);
1400 ra->nd_ra_retransmit = htonl(rai->rai_retranstimer);
1403 if (rai->rai_advlinkopt) {
1404 lladdropt_fill(&ifi->ifi_sdl, (struct nd_opt_hdr *)buf);
1405 buf += lladdroptlen;
1408 if (rai->rai_linkmtu) {
1409 ndopt_mtu = (struct nd_opt_mtu *)buf;
1410 ndopt_mtu->nd_opt_mtu_type = ND_OPT_MTU;
1411 ndopt_mtu->nd_opt_mtu_len = 1;
1412 ndopt_mtu->nd_opt_mtu_reserved = 0;
1413 ndopt_mtu->nd_opt_mtu_mtu = htonl(rai->rai_linkmtu);
1414 buf += sizeof(struct nd_opt_mtu);
1417 TAILQ_FOREACH(pfx, &rai->rai_prefix, pfx_next) {
1418 uint32_t vltime, pltime;
1419 struct timespec now;
1421 ndopt_pi = (struct nd_opt_prefix_info *)buf;
1422 ndopt_pi->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
1423 ndopt_pi->nd_opt_pi_len = 4;
1424 ndopt_pi->nd_opt_pi_prefix_len = pfx->pfx_prefixlen;
1425 ndopt_pi->nd_opt_pi_flags_reserved = 0;
1426 if (pfx->pfx_onlinkflg)
1427 ndopt_pi->nd_opt_pi_flags_reserved |=
1428 ND_OPT_PI_FLAG_ONLINK;
1429 if (pfx->pfx_autoconfflg)
1430 ndopt_pi->nd_opt_pi_flags_reserved |=
1431 ND_OPT_PI_FLAG_AUTO;
1435 if (pfx->pfx_vltimeexpire || pfx->pfx_pltimeexpire)
1436 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
1437 if (pfx->pfx_vltimeexpire == 0)
1438 vltime = pfx->pfx_validlifetime;
1440 vltime = ((time_t)pfx->pfx_vltimeexpire > now.tv_sec) ?
1441 pfx->pfx_vltimeexpire - now.tv_sec : 0;
1446 if (pfx->pfx_pltimeexpire == 0)
1447 pltime = pfx->pfx_preflifetime;
1449 pltime = ((time_t)pfx->pfx_pltimeexpire > now.tv_sec) ?
1450 pfx->pfx_pltimeexpire - now.tv_sec : 0;
1452 if (vltime < pltime) {
1454 * this can happen if vltime is decrement but pltime
1459 ndopt_pi->nd_opt_pi_valid_time = htonl(vltime);
1460 ndopt_pi->nd_opt_pi_preferred_time = htonl(pltime);
1461 ndopt_pi->nd_opt_pi_reserved2 = 0;
1462 ndopt_pi->nd_opt_pi_prefix = pfx->pfx_prefix;
1464 buf += sizeof(struct nd_opt_prefix_info);
1467 TAILQ_FOREACH(rti, &rai->rai_route, rti_next) {
1468 uint8_t psize = (rti->rti_prefixlen + 0x3f) >> 6;
1470 ndopt_rti = (struct nd_opt_route_info *)buf;
1471 ndopt_rti->nd_opt_rti_type = ND_OPT_ROUTE_INFO;
1472 ndopt_rti->nd_opt_rti_len = 1 + psize;
1473 ndopt_rti->nd_opt_rti_prefixlen = rti->rti_prefixlen;
1474 ndopt_rti->nd_opt_rti_flags = 0xff & rti->rti_rtpref;
1475 ndopt_rti->nd_opt_rti_lifetime = htonl(rti->rti_ltime);
1476 memcpy(ndopt_rti + 1, &rti->rti_prefix, psize * 8);
1477 buf += sizeof(struct nd_opt_route_info) + psize * 8;
1480 TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
1481 struct rdnss_addr *rdna;
1483 ndopt_rdnss = (struct nd_opt_rdnss *)buf;
1484 ndopt_rdnss->nd_opt_rdnss_type = ND_OPT_RDNSS;
1485 ndopt_rdnss->nd_opt_rdnss_len = 0;
1486 ndopt_rdnss->nd_opt_rdnss_reserved = 0;
1487 ndopt_rdnss->nd_opt_rdnss_lifetime = htonl(rdn->rd_ltime);
1488 buf += sizeof(struct nd_opt_rdnss);
1490 TAILQ_FOREACH(rdna, &rdn->rd_list, ra_next) {
1491 memcpy(buf, &rdna->ra_dns, sizeof(rdna->ra_dns));
1492 buf += sizeof(rdna->ra_dns);
1494 /* Length field should be in 8 octets */
1495 ndopt_rdnss->nd_opt_rdnss_len = (buf - (char *)ndopt_rdnss) / 8;
1497 syslog(LOG_DEBUG, "<%s>: nd_opt_dnss_len = %d", __func__,
1498 ndopt_rdnss->nd_opt_rdnss_len);
1501 TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
1502 struct dnssl_addr *dnsa;
1504 ndopt_dnssl = (struct nd_opt_dnssl *)buf;
1505 ndopt_dnssl->nd_opt_dnssl_type = ND_OPT_DNSSL;
1506 ndopt_dnssl->nd_opt_dnssl_len = 0;
1507 ndopt_dnssl->nd_opt_dnssl_reserved = 0;
1508 ndopt_dnssl->nd_opt_dnssl_lifetime = htonl(dns->dn_ltime);
1509 buf += sizeof(*ndopt_dnssl);
1511 TAILQ_FOREACH(dnsa, &dns->dn_list, da_next) {
1512 memcpy(buf, dnsa->da_dom, dnsa->da_len);
1513 buf += dnsa->da_len;
1516 /* A zero octet after encoded DNS server list. */
1519 /* Padding to next 8 octets boundary */
1520 len = buf - (char *)ndopt_dnssl;
1521 len += (len % 8) ? 8 - len % 8 : 0;
1523 /* Length field must be in 8 octets */
1524 ndopt_dnssl->nd_opt_dnssl_len = len / 8;
1526 syslog(LOG_DEBUG, "<%s>: nd_opt_dnssl_len = %d", __func__,
1527 ndopt_dnssl->nd_opt_dnssl_len);