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>
40 #include <net/if_var.h>
41 #include <net/route.h>
42 #include <net/if_dl.h>
44 #include <netinet/in.h>
45 #include <netinet/in_var.h>
46 #include <netinet/ip6.h>
47 #include <netinet6/ip6_var.h>
48 #include <netinet/icmp6.h>
49 #include <netinet6/nd6.h>
51 #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 becasue 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)) {
566 gettimeofday(&now, 0);
567 pfx->pfx_vltimeexpire =
568 now.tv_sec + pfx->pfx_validlifetime;
571 makeentry(entbuf, sizeof(entbuf), i, "pltime");
572 MAYHAVE(val64, entbuf, DEF_ADVPREFERREDLIFETIME);
573 if (val64 < 0 || val64 > 0xffffffff) {
575 "<%s> pltime (%" PRIu64 ") for %s/%d on %s "
578 addr, pfx->pfx_prefixlen, ifi->ifi_ifname);
579 goto getconfig_free_pfx;
581 pfx->pfx_preflifetime = (uint32_t)val64;
583 makeentry(entbuf, sizeof(entbuf), i, "pltimedecr");
584 if (agetflag(entbuf)) {
586 gettimeofday(&now, 0);
587 pfx->pfx_pltimeexpire =
588 now.tv_sec + pfx->pfx_preflifetime;
590 /* link into chain */
591 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
597 if (rai->rai_advifprefix && rai->rai_pfxs == 0)
600 MAYHAVE(val64, "mtu", 0);
601 if (val < 0 || val64 > 0xffffffff) {
603 "<%s> mtu (%" PRIu64 ") on %s out of range",
604 __func__, val64, ifi->ifi_ifname);
605 goto getconfig_free_rai;
607 rai->rai_linkmtu = (uint32_t)val64;
608 if (rai->rai_linkmtu == 0) {
611 if ((mtustr = (char *)agetstr("mtu", &bp)) &&
612 strcmp(mtustr, "auto") == 0)
613 rai->rai_linkmtu = ifi->ifi_phymtu;
615 else if (rai->rai_linkmtu < IPV6_MMTU ||
616 rai->rai_linkmtu > ifi->ifi_phymtu) {
618 "<%s> advertised link mtu (%" PRIu32 ") on %s is invalid (must "
619 "be between least MTU (%d) and physical link MTU (%d)",
620 __func__, rai->rai_linkmtu, ifi->ifi_ifname,
621 IPV6_MMTU, ifi->ifi_phymtu);
622 goto getconfig_free_rai;
625 #ifdef SIOCSIFINFO_IN6
627 struct in6_ndireq ndi;
630 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
631 syslog(LOG_ERR, "<%s> socket: %s", __func__,
635 memset(&ndi, 0, sizeof(ndi));
636 strncpy(ndi.ifname, ifi->ifi_ifname, sizeof(ndi.ifname));
637 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&ndi) < 0)
638 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFINFO_IN6 at %s: %s",
639 __func__, ifi->ifi_ifname, strerror(errno));
641 /* reflect the RA info to the host variables in kernel */
642 ndi.ndi.chlim = rai->rai_hoplimit;
643 ndi.ndi.retrans = rai->rai_retranstimer;
644 ndi.ndi.basereachable = rai->rai_reachabletime;
645 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&ndi) < 0)
646 syslog(LOG_INFO, "<%s> ioctl:SIOCSIFINFO_IN6 at %s: %s",
647 __func__, ifi->ifi_ifname, strerror(errno));
653 /* route information */
655 for (i = -1; i < MAXROUTE; i++) {
658 makeentry(entbuf, sizeof(entbuf), i, "rtprefix");
659 addr = (char *)agetstr(entbuf, &bp);
661 makeentry(oentbuf, sizeof(oentbuf), i, "rtrprefix");
662 addr = (char *)agetstr(oentbuf, &bp);
664 fprintf(stderr, "%s was obsoleted. Use %s.\n",
670 /* allocate memory to store prefix information */
671 ELM_MALLOC(rti, exit(1));
673 if (inet_pton(AF_INET6, addr, &rti->rti_prefix) != 1) {
674 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
676 goto getconfig_free_rti;
680 * XXX: currently there's no restriction in route information
681 * prefix according to
682 * draft-ietf-ipngwg-router-selection-00.txt.
683 * However, I think the similar restriction be necessary.
685 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
686 if (IN6_IS_ADDR_MULTICAST(&rti->prefix)) {
688 "<%s> multicast route (%s) must "
689 "not be advertised on %s",
690 __func__, addr, ifi->ifi_ifname);
691 goto getconfig_free_rti;
693 if (IN6_IS_ADDR_LINKLOCAL(&rti->prefix)) {
695 "<%s> link-local route (%s) will "
696 "be advertised on %s",
697 __func__, addr, ifi->ifi_ifname);
698 goto getconfig_free_rti;
702 makeentry(entbuf, sizeof(entbuf), i, "rtplen");
703 /* XXX: 256 is a magic number for compatibility check. */
704 MAYHAVE(val, entbuf, 256);
706 makeentry(oentbuf, sizeof(oentbuf), i, "rtrplen");
707 MAYHAVE(val, oentbuf, 256);
709 fprintf(stderr, "%s was obsoleted. Use %s.\n",
714 if (val < 0 || val > 128) {
715 syslog(LOG_ERR, "<%s> prefixlen (%" PRIu32 ") for %s on %s "
717 __func__, val, addr, ifi->ifi_ifname);
718 goto getconfig_free_rti;
720 rti->rti_prefixlen = (int)val;
722 makeentry(entbuf, sizeof(entbuf), i, "rtflags");
723 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
725 if (strchr(flagstr, 'h'))
726 val |= ND_RA_FLAG_RTPREF_HIGH;
727 if (strchr(flagstr, 'l')) {
728 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
730 "<%s> the \'h\' and \'l\' route"
731 " preferences are exclusive",
733 goto getconfig_free_rti;
735 val |= ND_RA_FLAG_RTPREF_LOW;
738 MAYHAVE(val, entbuf, 256); /* XXX */
740 makeentry(oentbuf, sizeof(oentbuf), i, "rtrflags");
741 MAYHAVE(val, oentbuf, 256);
743 fprintf(stderr, "%s was obsoleted. Use %s.\n",
748 rti->rti_rtpref = val & ND_RA_FLAG_RTPREF_MASK;
749 if (rti->rti_rtpref == ND_RA_FLAG_RTPREF_RSV) {
750 syslog(LOG_ERR, "<%s> invalid route preference (%02x) "
752 __func__, rti->rti_rtpref, addr,
753 rti->rti_prefixlen, ifi->ifi_ifname);
754 goto getconfig_free_rti;
758 * Since the spec does not a default value, we should make
759 * this entry mandatory. However, FreeBSD 4.4 has shipped
760 * with this field being optional, we use the router lifetime
761 * as an ad-hoc default value with a warning message.
763 makeentry(entbuf, sizeof(entbuf), i, "rtltime");
764 MAYHAVE(val64, entbuf, -1);
766 makeentry(oentbuf, sizeof(oentbuf), i, "rtrltime");
767 MAYHAVE(val64, oentbuf, -1);
769 fprintf(stderr, "%s was obsoleted. Use %s.\n",
772 fprintf(stderr, "%s should be specified "
773 "for interface %s.\n", entbuf,
775 val64 = rai->rai_lifetime;
778 if (val64 < 0 || val64 > 0xffffffff) {
779 syslog(LOG_ERR, "<%s> route lifetime (%" PRIu64 ") for "
780 "%s/%d on %s out of range", __func__,
781 val64, addr, rti->rti_prefixlen,
783 goto getconfig_free_rti;
785 rti->rti_ltime = (uint32_t)val64;
787 /* link into chain */
788 TAILQ_INSERT_TAIL(&rai->rai_route, rti, rti_next);
795 /* DNS server and DNS search list information */
796 for (i = -1; i < MAXRDNSSENT ; i++) {
798 struct rdnss_addr *rdna;
802 makeentry(entbuf, sizeof(entbuf), i, "rdnss");
803 addr = (char *)agetstr(entbuf, &bp);
806 ELM_MALLOC(rdn, exit(1));
808 TAILQ_INIT(&rdn->rd_list);
810 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
811 c = strcspn(ap, ",");
812 strncpy(abuf, ap, c);
814 ELM_MALLOC(rdna, goto getconfig_free_rdn);
815 if (inet_pton(AF_INET6, abuf, &rdna->ra_dns) != 1) {
816 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
819 goto getconfig_free_rdn;
821 TAILQ_INSERT_TAIL(&rdn->rd_list, rdna, ra_next);
824 makeentry(entbuf, sizeof(entbuf), i, "rdnssltime");
825 MAYHAVE(val, entbuf, (rai->rai_maxinterval * 3 / 2));
826 if ((uint16_t)val < rai->rai_maxinterval ||
827 (uint16_t)val > rai->rai_maxinterval * 2) {
828 syslog(LOG_ERR, "%s (%" PRIu16 ") on %s is invalid "
829 "(must be between %d and %d)",
830 entbuf, val, ifi->ifi_ifname, rai->rai_maxinterval,
831 rai->rai_maxinterval * 2);
832 goto getconfig_free_rdn;
836 /* link into chain */
837 TAILQ_INSERT_TAIL(&rai->rai_rdnss, rdn, rd_next);
840 while ((rdna = TAILQ_FIRST(&rdn->rd_list)) != NULL) {
841 TAILQ_REMOVE(&rdn->rd_list, rdna, ra_next);
847 for (i = -1; i < MAXDNSSLENT ; i++) {
849 struct dnssl_addr *dnsa;
853 makeentry(entbuf, sizeof(entbuf), i, "dnssl");
854 addr = (char *)agetstr(entbuf, &bp);
858 ELM_MALLOC(dns, exit(1));
860 TAILQ_INIT(&dns->dn_list);
862 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
863 c = strcspn(ap, ",");
864 strncpy(abuf, ap, c);
866 ELM_MALLOC(dnsa, goto getconfig_free_dns);
867 dnsa->da_len = dname_labelenc(dnsa->da_dom, abuf);
868 syslog(LOG_DEBUG, "<%s>: dnsa->da_len = %d", __func__,
870 TAILQ_INSERT_TAIL(&dns->dn_list, dnsa, da_next);
873 makeentry(entbuf, sizeof(entbuf), i, "dnsslltime");
874 MAYHAVE(val, entbuf, (rai->rai_maxinterval * 3 / 2));
875 if ((uint16_t)val < rai->rai_maxinterval ||
876 (uint16_t)val > rai->rai_maxinterval * 2) {
877 syslog(LOG_ERR, "%s (%" PRIu16 ") on %s is invalid "
878 "(must be between %d and %d)",
879 entbuf, val, ifi->ifi_ifname, rai->rai_maxinterval,
880 rai->rai_maxinterval * 2);
881 goto getconfig_free_dns;
885 /* link into chain */
886 TAILQ_INSERT_TAIL(&rai->rai_dnssl, dns, dn_next);
889 while ((dnsa = TAILQ_FIRST(&dns->dn_list)) != NULL) {
890 TAILQ_REMOVE(&dns->dn_list, dnsa, da_next);
895 /* construct the sending packet */
899 * If an entry with the same ifindex exists, remove it first.
900 * Before the removal, RDNSS and DNSSL options with
901 * zero-lifetime will be sent.
903 switch (ifi->ifi_state) {
904 case IFI_STATE_UNCONFIGURED:
905 /* UNCONFIGURED -> TRANSITIVE */
907 error = sock_mc_join(&sock, ifi->ifi_ifindex);
911 ifi->ifi_state = IFI_STATE_TRANSITIVE;
912 ifi->ifi_burstcount = MAX_INITIAL_RTR_ADVERTISEMENTS;
913 ifi->ifi_burstinterval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
915 /* The same two rai mean initial burst */
916 ifi->ifi_rainfo = rai;
917 ifi->ifi_rainfo_trans = rai;
918 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
920 if (ifi->ifi_ra_timer == NULL)
921 ifi->ifi_ra_timer = rtadvd_add_timer(ra_timeout,
922 ra_timer_update, ifi, ifi);
923 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
924 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
928 "<%s> ifname=%s marked as TRANSITIVE (initial burst).",
929 __func__, ifi->ifi_ifname);
931 case IFI_STATE_CONFIGURED:
932 /* CONFIGURED -> TRANSITIVE */
933 rai_old = ifi->ifi_rainfo;
934 if (rai_old == NULL) {
936 "<%s> ifi_rainfo is NULL"
937 " in IFI_STATE_CONFIGURED.", __func__);
944 rai_old->rai_lifetime = 0;
945 TAILQ_FOREACH(rdn, &rai_old->rai_rdnss, rd_next)
947 TAILQ_FOREACH(dns, &rai_old->rai_dnssl, dn_next)
950 ifi->ifi_rainfo_trans = rai_old;
951 ifi->ifi_state = IFI_STATE_TRANSITIVE;
952 ifi->ifi_burstcount = MAX_FINAL_RTR_ADVERTISEMENTS;
953 ifi->ifi_burstinterval = MIN_DELAY_BETWEEN_RAS;
955 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
956 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
960 "<%s> ifname=%s marked as TRANSITIVE"
961 " (transitional burst)",
962 __func__, ifi->ifi_ifname);
964 ifi->ifi_rainfo = rai;
965 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
967 case IFI_STATE_TRANSITIVE:
968 if (ifi->ifi_rainfo != NULL) {
969 if (ifi->ifi_rainfo == ifi->ifi_rainfo_trans) {
970 /* Reinitialize initial burst */
971 rm_rainfo(ifi->ifi_rainfo);
972 ifi->ifi_rainfo = rai;
973 ifi->ifi_rainfo_trans = rai;
974 ifi->ifi_burstcount =
975 MAX_INITIAL_RTR_ADVERTISEMENTS;
976 ifi->ifi_burstinterval =
977 MAX_INITIAL_RTR_ADVERT_INTERVAL;
979 /* Replace ifi_rainfo with the new one */
980 rm_rainfo(ifi->ifi_rainfo);
981 ifi->ifi_rainfo = rai;
983 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
985 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
986 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
989 /* XXX: NOTREACHED. Being shut down. */
991 "<%s> %s is shutting down. Skipped.",
992 __func__, ifi->ifi_ifname);
1008 get_prefix(struct rainfo *rai)
1010 struct ifaddrs *ifap, *ifa;
1014 char *p, *ep, *m, *lim;
1015 char ntopbuf[INET6_ADDRSTRLEN];
1017 if (getifaddrs(&ifap) < 0) {
1019 "<%s> can't get interface addresses",
1023 ifi = rai->rai_ifinfo;
1025 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1028 if (strcmp(ifa->ifa_name, ifi->ifi_ifname) != 0)
1030 if (ifa->ifa_addr->sa_family != AF_INET6)
1032 a = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1033 if (IN6_IS_ADDR_LINKLOCAL(a))
1036 /* get prefix length */
1037 m = (char *)&((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1038 lim = (char *)(ifa->ifa_netmask) + ifa->ifa_netmask->sa_len;
1039 plen = prefixlen(m, lim);
1040 if (plen <= 0 || plen > 128) {
1041 syslog(LOG_ERR, "<%s> failed to get prefixlen "
1042 "or prefix is invalid",
1046 if (plen == 128) /* XXX */
1048 if (find_prefix(rai, a, plen)) {
1049 /* ignore a duplicated prefix. */
1053 /* allocate memory to store prefix info. */
1054 ELM_MALLOC(pfx, exit(1));
1056 /* set prefix, sweep bits outside of prefixlen */
1057 pfx->pfx_prefixlen = plen;
1058 memcpy(&pfx->pfx_prefix, a, sizeof(*a));
1059 p = (char *)&pfx->pfx_prefix;
1060 ep = (char *)(&pfx->pfx_prefix + 1);
1061 while (m < lim && p < ep)
1065 if (!inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1067 syslog(LOG_ERR, "<%s> inet_ntop failed", __func__);
1071 "<%s> add %s/%d to prefix list on %s",
1072 __func__, ntopbuf, pfx->pfx_prefixlen, ifi->ifi_ifname);
1074 /* set other fields with protocol defaults */
1075 pfx->pfx_validlifetime = DEF_ADVVALIDLIFETIME;
1076 pfx->pfx_preflifetime = DEF_ADVPREFERREDLIFETIME;
1077 pfx->pfx_onlinkflg = 1;
1078 pfx->pfx_autoconfflg = 1;
1079 pfx->pfx_origin = PREFIX_FROM_KERNEL;
1080 pfx->pfx_rainfo = rai;
1082 /* link into chain */
1083 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
1085 /* counter increment */
1093 makeentry(char *buf, size_t len, int id, const char *string)
1097 strlcpy(buf, string, len);
1099 snprintf(buf, len, "%s%d", string, id);
1103 * Add a prefix to the list of specified interface and reconstruct
1104 * the outgoing packet.
1105 * The prefix must not be in the list.
1106 * XXX: other parameters of the prefix (e.g. lifetime) should be
1107 * able to be specified.
1110 add_prefix(struct rainfo *rai, struct in6_prefixreq *ipr)
1114 char ntopbuf[INET6_ADDRSTRLEN];
1116 ifi = rai->rai_ifinfo;
1117 ELM_MALLOC(pfx, return);
1118 pfx->pfx_prefix = ipr->ipr_prefix.sin6_addr;
1119 pfx->pfx_prefixlen = ipr->ipr_plen;
1120 pfx->pfx_validlifetime = ipr->ipr_vltime;
1121 pfx->pfx_preflifetime = ipr->ipr_pltime;
1122 pfx->pfx_onlinkflg = ipr->ipr_raf_onlink;
1123 pfx->pfx_autoconfflg = ipr->ipr_raf_auto;
1124 pfx->pfx_origin = PREFIX_FROM_DYNAMIC;
1125 pfx->pfx_rainfo = rai;
1127 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
1129 syslog(LOG_DEBUG, "<%s> new prefix %s/%d was added on %s",
1131 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1132 sizeof(ntopbuf)), ipr->ipr_plen, ifi->ifi_ifname);
1138 * Delete a prefix to the list of specified interface and reconstruct
1139 * the outgoing packet.
1140 * The prefix must be in the list.
1143 delete_prefix(struct prefix *pfx)
1147 char ntopbuf[INET6_ADDRSTRLEN];
1149 rai = pfx->pfx_rainfo;
1150 ifi = rai->rai_ifinfo;
1151 TAILQ_REMOVE(&rai->rai_prefix, pfx, pfx_next);
1152 syslog(LOG_DEBUG, "<%s> prefix %s/%d was deleted on %s",
1154 inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1155 sizeof(ntopbuf)), pfx->pfx_prefixlen, ifi->ifi_ifname);
1157 rtadvd_remove_timer(pfx->pfx_timer);
1164 invalidate_prefix(struct prefix *pfx)
1166 struct timeval timo;
1169 char ntopbuf[INET6_ADDRSTRLEN];
1171 rai = pfx->pfx_rainfo;
1172 ifi = rai->rai_ifinfo;
1173 if (pfx->pfx_timer) { /* sanity check */
1175 "<%s> assumption failure: timer already exists",
1180 syslog(LOG_DEBUG, "<%s> prefix %s/%d was invalidated on %s, "
1181 "will expire in %ld seconds", __func__,
1182 inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf, sizeof(ntopbuf)),
1183 pfx->pfx_prefixlen, ifi->ifi_ifname, (long)prefix_timo);
1185 /* set the expiration timer */
1186 pfx->pfx_timer = rtadvd_add_timer(prefix_timeout, NULL, pfx, NULL);
1187 if (pfx->pfx_timer == NULL) {
1188 syslog(LOG_ERR, "<%s> failed to add a timer for a prefix. "
1189 "remove the prefix", __func__);
1192 timo.tv_sec = prefix_timo;
1194 rtadvd_set_timer(&timo, pfx->pfx_timer);
1197 static struct rtadvd_timer *
1198 prefix_timeout(void *arg)
1201 delete_prefix((struct prefix *)arg);
1207 update_prefix(struct prefix *pfx)
1211 char ntopbuf[INET6_ADDRSTRLEN];
1213 rai = pfx->pfx_rainfo;
1214 ifi = rai->rai_ifinfo;
1215 if (pfx->pfx_timer == NULL) { /* sanity check */
1217 "<%s> assumption failure: timer does not exist",
1222 syslog(LOG_DEBUG, "<%s> prefix %s/%d was re-enabled on %s",
1223 __func__, inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1224 sizeof(ntopbuf)), pfx->pfx_prefixlen, ifi->ifi_ifname);
1226 /* stop the expiration timer */
1227 rtadvd_remove_timer(pfx->pfx_timer);
1228 pfx->pfx_timer = NULL;
1232 * Try to get an in6_prefixreq contents for a prefix which matches
1233 * ipr->ipr_prefix and ipr->ipr_plen and belongs to
1234 * the interface whose name is ipr->ipr_name[].
1237 init_prefix(struct in6_prefixreq *ipr)
1242 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1243 syslog(LOG_ERR, "<%s> socket: %s", __func__,
1248 if (ioctl(s, SIOCGIFPREFIX_IN6, (caddr_t)ipr) < 0) {
1249 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFPREFIX %s", __func__,
1252 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1253 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1254 ipr->ipr_raf_onlink = 1;
1255 ipr->ipr_raf_auto = 1;
1256 /* omit other field initialization */
1258 else if (ipr->ipr_origin < PR_ORIG_RR) {
1259 char ntopbuf[INET6_ADDRSTRLEN];
1261 syslog(LOG_WARNING, "<%s> Added prefix(%s)'s origin %d is"
1262 "lower than PR_ORIG_RR(router renumbering)."
1263 "This should not happen if I am router", __func__,
1264 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1265 sizeof(ntopbuf)), ipr->ipr_origin);
1273 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1274 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1275 ipr->ipr_raf_onlink = 1;
1276 ipr->ipr_raf_auto = 1;
1282 make_prefix(struct rainfo *rai, int ifindex, struct in6_addr *addr, int plen)
1284 struct in6_prefixreq ipr;
1286 memset(&ipr, 0, sizeof(ipr));
1287 if (if_indextoname(ifindex, ipr.ipr_name) == NULL) {
1288 syslog(LOG_ERR, "<%s> Prefix added interface No.%d doesn't"
1289 "exist. This should not happen! %s", __func__,
1290 ifindex, strerror(errno));
1293 ipr.ipr_prefix.sin6_len = sizeof(ipr.ipr_prefix);
1294 ipr.ipr_prefix.sin6_family = AF_INET6;
1295 ipr.ipr_prefix.sin6_addr = *addr;
1296 ipr.ipr_plen = plen;
1298 if (init_prefix(&ipr))
1299 return; /* init failed by some error */
1300 add_prefix(rai, &ipr);
1304 make_packet(struct rainfo *rai)
1306 size_t packlen, lladdroptlen = 0;
1308 struct nd_router_advert *ra;
1309 struct nd_opt_prefix_info *ndopt_pi;
1310 struct nd_opt_mtu *ndopt_mtu;
1311 struct nd_opt_route_info *ndopt_rti;
1313 struct nd_opt_rdnss *ndopt_rdnss;
1315 struct nd_opt_dnssl *ndopt_dnssl;
1321 ifi = rai->rai_ifinfo;
1322 /* calculate total length */
1323 packlen = sizeof(struct nd_router_advert);
1324 if (rai->rai_advlinkopt) {
1325 if ((lladdroptlen = lladdropt_length(&ifi->ifi_sdl)) == 0) {
1327 "<%s> link-layer address option has"
1328 " null length on %s. Treat as not included.",
1329 __func__, ifi->ifi_ifname);
1330 rai->rai_advlinkopt = 0;
1332 packlen += lladdroptlen;
1335 packlen += sizeof(struct nd_opt_prefix_info) * rai->rai_pfxs;
1336 if (rai->rai_linkmtu)
1337 packlen += sizeof(struct nd_opt_mtu);
1339 TAILQ_FOREACH(rti, &rai->rai_route, rti_next)
1340 packlen += sizeof(struct nd_opt_route_info) +
1341 ((rti->rti_prefixlen + 0x3f) >> 6) * 8;
1343 TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
1344 struct rdnss_addr *rdna;
1346 packlen += sizeof(struct nd_opt_rdnss);
1347 TAILQ_FOREACH(rdna, &rdn->rd_list, ra_next)
1348 packlen += sizeof(rdna->ra_dns);
1350 TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
1351 struct dnssl_addr *dnsa;
1353 packlen += sizeof(struct nd_opt_dnssl);
1355 TAILQ_FOREACH(dnsa, &dns->dn_list, da_next)
1356 len += dnsa->da_len;
1358 /* A zero octet and 8 octet boundary */
1360 len += (len % 8) ? 8 - len % 8 : 0;
1364 /* allocate memory for the packet */
1365 if ((buf = malloc(packlen)) == NULL) {
1367 "<%s> can't get enough memory for an RA packet",
1371 memset(buf, 0, packlen);
1372 if (rai->rai_ra_data) /* Free old data if any. */
1373 free(rai->rai_ra_data);
1374 rai->rai_ra_data = buf;
1375 /* XXX: what if packlen > 576? */
1376 rai->rai_ra_datalen = packlen;
1379 * construct the packet
1381 ra = (struct nd_router_advert *)buf;
1382 ra->nd_ra_type = ND_ROUTER_ADVERT;
1384 ra->nd_ra_cksum = 0;
1385 ra->nd_ra_curhoplimit = (uint8_t)(0xff & rai->rai_hoplimit);
1386 ra->nd_ra_flags_reserved = 0; /* just in case */
1388 * XXX: the router preference field, which is a 2-bit field, should be
1389 * initialized before other fields.
1391 ra->nd_ra_flags_reserved = 0xff & rai->rai_rtpref;
1392 ra->nd_ra_flags_reserved |=
1393 rai->rai_managedflg ? ND_RA_FLAG_MANAGED : 0;
1394 ra->nd_ra_flags_reserved |=
1395 rai->rai_otherflg ? ND_RA_FLAG_OTHER : 0;
1396 ra->nd_ra_router_lifetime = htons(rai->rai_lifetime);
1397 ra->nd_ra_reachable = htonl(rai->rai_reachabletime);
1398 ra->nd_ra_retransmit = htonl(rai->rai_retranstimer);
1401 if (rai->rai_advlinkopt) {
1402 lladdropt_fill(&ifi->ifi_sdl, (struct nd_opt_hdr *)buf);
1403 buf += lladdroptlen;
1406 if (rai->rai_linkmtu) {
1407 ndopt_mtu = (struct nd_opt_mtu *)buf;
1408 ndopt_mtu->nd_opt_mtu_type = ND_OPT_MTU;
1409 ndopt_mtu->nd_opt_mtu_len = 1;
1410 ndopt_mtu->nd_opt_mtu_reserved = 0;
1411 ndopt_mtu->nd_opt_mtu_mtu = htonl(rai->rai_linkmtu);
1412 buf += sizeof(struct nd_opt_mtu);
1415 TAILQ_FOREACH(pfx, &rai->rai_prefix, pfx_next) {
1416 uint32_t vltime, pltime;
1419 ndopt_pi = (struct nd_opt_prefix_info *)buf;
1420 ndopt_pi->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
1421 ndopt_pi->nd_opt_pi_len = 4;
1422 ndopt_pi->nd_opt_pi_prefix_len = pfx->pfx_prefixlen;
1423 ndopt_pi->nd_opt_pi_flags_reserved = 0;
1424 if (pfx->pfx_onlinkflg)
1425 ndopt_pi->nd_opt_pi_flags_reserved |=
1426 ND_OPT_PI_FLAG_ONLINK;
1427 if (pfx->pfx_autoconfflg)
1428 ndopt_pi->nd_opt_pi_flags_reserved |=
1429 ND_OPT_PI_FLAG_AUTO;
1433 if (pfx->pfx_vltimeexpire || pfx->pfx_pltimeexpire)
1434 gettimeofday(&now, NULL);
1435 if (pfx->pfx_vltimeexpire == 0)
1436 vltime = pfx->pfx_validlifetime;
1438 vltime = ((time_t)pfx->pfx_vltimeexpire > now.tv_sec) ?
1439 pfx->pfx_vltimeexpire - now.tv_sec : 0;
1444 if (pfx->pfx_pltimeexpire == 0)
1445 pltime = pfx->pfx_preflifetime;
1447 pltime = ((time_t)pfx->pfx_pltimeexpire > now.tv_sec) ?
1448 pfx->pfx_pltimeexpire - now.tv_sec : 0;
1450 if (vltime < pltime) {
1452 * this can happen if vltime is decrement but pltime
1457 ndopt_pi->nd_opt_pi_valid_time = htonl(vltime);
1458 ndopt_pi->nd_opt_pi_preferred_time = htonl(pltime);
1459 ndopt_pi->nd_opt_pi_reserved2 = 0;
1460 ndopt_pi->nd_opt_pi_prefix = pfx->pfx_prefix;
1462 buf += sizeof(struct nd_opt_prefix_info);
1465 TAILQ_FOREACH(rti, &rai->rai_route, rti_next) {
1466 uint8_t psize = (rti->rti_prefixlen + 0x3f) >> 6;
1468 ndopt_rti = (struct nd_opt_route_info *)buf;
1469 ndopt_rti->nd_opt_rti_type = ND_OPT_ROUTE_INFO;
1470 ndopt_rti->nd_opt_rti_len = 1 + psize;
1471 ndopt_rti->nd_opt_rti_prefixlen = rti->rti_prefixlen;
1472 ndopt_rti->nd_opt_rti_flags = 0xff & rti->rti_rtpref;
1473 ndopt_rti->nd_opt_rti_lifetime = htonl(rti->rti_ltime);
1474 memcpy(ndopt_rti + 1, &rti->rti_prefix, psize * 8);
1475 buf += sizeof(struct nd_opt_route_info) + psize * 8;
1478 TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
1479 struct rdnss_addr *rdna;
1481 ndopt_rdnss = (struct nd_opt_rdnss *)buf;
1482 ndopt_rdnss->nd_opt_rdnss_type = ND_OPT_RDNSS;
1483 ndopt_rdnss->nd_opt_rdnss_len = 0;
1484 ndopt_rdnss->nd_opt_rdnss_reserved = 0;
1485 ndopt_rdnss->nd_opt_rdnss_lifetime = htonl(rdn->rd_ltime);
1486 buf += sizeof(struct nd_opt_rdnss);
1488 TAILQ_FOREACH(rdna, &rdn->rd_list, ra_next) {
1489 memcpy(buf, &rdna->ra_dns, sizeof(rdna->ra_dns));
1490 buf += sizeof(rdna->ra_dns);
1492 /* Length field should be in 8 octets */
1493 ndopt_rdnss->nd_opt_rdnss_len = (buf - (char *)ndopt_rdnss) / 8;
1495 syslog(LOG_DEBUG, "<%s>: nd_opt_dnss_len = %d", __func__,
1496 ndopt_rdnss->nd_opt_rdnss_len);
1499 TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
1500 struct dnssl_addr *dnsa;
1502 ndopt_dnssl = (struct nd_opt_dnssl *)buf;
1503 ndopt_dnssl->nd_opt_dnssl_type = ND_OPT_DNSSL;
1504 ndopt_dnssl->nd_opt_dnssl_len = 0;
1505 ndopt_dnssl->nd_opt_dnssl_reserved = 0;
1506 ndopt_dnssl->nd_opt_dnssl_lifetime = htonl(dns->dn_ltime);
1507 buf += sizeof(*ndopt_dnssl);
1509 TAILQ_FOREACH(dnsa, &dns->dn_list, da_next) {
1510 memcpy(buf, dnsa->da_dom, dnsa->da_len);
1511 buf += dnsa->da_len;
1514 /* A zero octet after encoded DNS server list. */
1517 /* Padding to next 8 octets boundary */
1518 len = buf - (char *)ndopt_dnssl;
1519 len += (len % 8) ? 8 - len % 8 : 0;
1521 /* Length field must be in 8 octets */
1522 ndopt_dnssl->nd_opt_dnssl_len = len / 8;
1524 syslog(LOG_DEBUG, "<%s>: nd_opt_dnssl_len = %d", __func__,
1525 ndopt_dnssl->nd_opt_dnssl_len);