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);
234 /* recreate an empty entry */
235 update_persist_ifinfo(&ifilist, ifi->ifi_ifname);
236 syslog(LOG_DEBUG, "<%s>: ifname=%s is persistent.",
237 __func__, ifi->ifi_ifname);
240 /* clean up rai if any */
241 switch (ifi->ifi_state) {
242 case IFI_STATE_CONFIGURED:
243 if (ifi->ifi_rainfo != NULL) {
244 error = rm_rainfo(ifi->ifi_rainfo);
247 ifi->ifi_rainfo = NULL;
250 case IFI_STATE_TRANSITIVE:
251 if (ifi->ifi_rainfo == ifi->ifi_rainfo_trans) {
252 if (ifi->ifi_rainfo != NULL) {
253 error = rm_rainfo(ifi->ifi_rainfo);
256 ifi->ifi_rainfo = NULL;
257 ifi->ifi_rainfo_trans = NULL;
260 if (ifi->ifi_rainfo != NULL) {
261 error = rm_rainfo(ifi->ifi_rainfo);
264 ifi->ifi_rainfo = NULL;
266 if (ifi->ifi_rainfo_trans != NULL) {
267 error = rm_rainfo(ifi->ifi_rainfo_trans);
270 ifi->ifi_rainfo_trans = NULL;
275 syslog(LOG_DEBUG, "<%s> leave (%s).", __func__, ifi->ifi_ifname);
280 rm_rainfo(struct rainfo *rai)
283 struct soliciter *sol;
285 struct rdnss_addr *rdna;
289 syslog(LOG_DEBUG, "<%s>: enter", __func__);
291 TAILQ_REMOVE(&railist, rai, rai_next);
292 if (rai->rai_ifinfo != NULL)
293 syslog(LOG_DEBUG, "<%s>: rainfo (idx=%d) removed.",
294 __func__, rai->rai_ifinfo->ifi_ifindex);
296 if (rai->rai_ra_data != NULL)
297 free(rai->rai_ra_data);
299 while ((pfx = TAILQ_FIRST(&rai->rai_prefix)) != NULL) {
300 TAILQ_REMOVE(&rai->rai_prefix, pfx, pfx_next);
303 while ((sol = TAILQ_FIRST(&rai->rai_soliciter)) != NULL) {
304 TAILQ_REMOVE(&rai->rai_soliciter, sol, sol_next);
307 while ((rdn = TAILQ_FIRST(&rai->rai_rdnss)) != NULL) {
308 TAILQ_REMOVE(&rai->rai_rdnss, rdn, rd_next);
309 while ((rdna = TAILQ_FIRST(&rdn->rd_list)) != NULL) {
310 TAILQ_REMOVE(&rdn->rd_list, rdna, ra_next);
315 while ((dns = TAILQ_FIRST(&rai->rai_dnssl)) != NULL) {
316 TAILQ_REMOVE(&rai->rai_dnssl, dns, dn_next);
319 while ((rti = TAILQ_FIRST(&rai->rai_route)) != NULL) {
320 TAILQ_REMOVE(&rai->rai_route, rti, rti_next);
324 syslog(LOG_DEBUG, "<%s>: leave", __func__);
330 getconfig(struct ifinfo *ifi)
336 struct rainfo *rai_old;
341 char *addr, *flagstr;
343 if (ifi == NULL) /* if does not exist */
346 if (ifi->ifi_state == IFI_STATE_TRANSITIVE &&
347 ifi->ifi_rainfo == NULL) {
348 syslog(LOG_INFO, "<%s> %s is shutting down. Skipped.",
349 __func__, ifi->ifi_ifname);
353 if ((stat = agetent(tbuf, ifi->ifi_ifname)) <= 0) {
354 memset(tbuf, 0, sizeof(tbuf));
356 "<%s> %s isn't defined in the configuration file"
357 " or the configuration file doesn't exist."
358 " Treat it as default",
359 __func__, ifi->ifi_ifname);
362 ELM_MALLOC(rai, exit(1));
363 TAILQ_INIT(&rai->rai_prefix);
364 TAILQ_INIT(&rai->rai_route);
365 TAILQ_INIT(&rai->rai_rdnss);
366 TAILQ_INIT(&rai->rai_dnssl);
367 TAILQ_INIT(&rai->rai_soliciter);
368 rai->rai_ifinfo = ifi;
370 /* gather on-link prefixes from the network interfaces. */
371 if (agetflag("noifprefix"))
372 rai->rai_advifprefix = 0;
374 rai->rai_advifprefix = 1;
376 /* get interface information */
377 if (agetflag("nolladdr"))
378 rai->rai_advlinkopt = 0;
380 rai->rai_advlinkopt = 1;
381 if (rai->rai_advlinkopt) {
382 if (ifi->ifi_sdl.sdl_type == 0) {
384 "<%s> can't get information of %s",
385 __func__, ifi->ifi_ifname);
386 goto getconfig_free_rai;
391 * set router configuration variables.
393 MAYHAVE(val, "maxinterval", DEF_MAXRTRADVINTERVAL);
394 if (val < MIN_MAXINTERVAL || val > MAX_MAXINTERVAL) {
396 "<%s> maxinterval (%" PRIu32 ") on %s is invalid "
397 "(must be between %u and %u)", __func__, val,
398 ifi->ifi_ifname, MIN_MAXINTERVAL, MAX_MAXINTERVAL);
399 goto getconfig_free_rai;
401 rai->rai_maxinterval = (uint16_t)val;
403 MAYHAVE(val, "mininterval", rai->rai_maxinterval/3);
404 if ((uint16_t)val < MIN_MININTERVAL ||
405 (uint16_t)val > (rai->rai_maxinterval * 3) / 4) {
407 "<%s> mininterval (%" PRIu32 ") on %s is invalid "
408 "(must be between %d and %d)",
409 __func__, val, ifi->ifi_ifname, MIN_MININTERVAL,
410 (rai->rai_maxinterval * 3) / 4);
411 goto getconfig_free_rai;
413 rai->rai_mininterval = (uint16_t)val;
415 MAYHAVE(val, "chlim", DEF_ADVCURHOPLIMIT);
416 rai->rai_hoplimit = val & 0xff;
418 if ((flagstr = (char *)agetstr("raflags", &bp))) {
420 if (strchr(flagstr, 'm'))
421 val |= ND_RA_FLAG_MANAGED;
422 if (strchr(flagstr, 'o'))
423 val |= ND_RA_FLAG_OTHER;
424 if (strchr(flagstr, 'h'))
425 val |= ND_RA_FLAG_RTPREF_HIGH;
426 if (strchr(flagstr, 'l')) {
427 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
428 syslog(LOG_ERR, "<%s> the \'h\' and \'l\'"
429 " router flags are exclusive", __func__);
430 goto getconfig_free_rai;
432 val |= ND_RA_FLAG_RTPREF_LOW;
435 MAYHAVE(val, "raflags", 0);
437 rai->rai_managedflg = val & ND_RA_FLAG_MANAGED;
438 rai->rai_otherflg = val & ND_RA_FLAG_OTHER;
439 #ifndef ND_RA_FLAG_RTPREF_MASK
440 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
441 #define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
443 rai->rai_rtpref = val & ND_RA_FLAG_RTPREF_MASK;
444 if (rai->rai_rtpref == ND_RA_FLAG_RTPREF_RSV) {
445 syslog(LOG_ERR, "<%s> invalid router preference (%02x) on %s",
446 __func__, rai->rai_rtpref, ifi->ifi_ifname);
447 goto getconfig_free_rai;
450 MAYHAVE(val, "rltime", rai->rai_maxinterval * 3);
451 if ((uint16_t)val && ((uint16_t)val < rai->rai_maxinterval ||
452 (uint16_t)val > MAXROUTERLIFETIME)) {
454 "<%s> router lifetime (%" PRIu32 ") on %s is invalid "
455 "(must be 0 or between %d and %d)",
456 __func__, val, ifi->ifi_ifname, rai->rai_maxinterval,
458 goto getconfig_free_rai;
460 rai->rai_lifetime = val & 0xffff;
462 MAYHAVE(val, "rtime", DEF_ADVREACHABLETIME);
463 if (val < 0 || val > MAXREACHABLETIME) {
465 "<%s> reachable time (%" PRIu32 ") on %s is invalid "
466 "(must be no greater than %d)",
467 __func__, val, ifi->ifi_ifname, MAXREACHABLETIME);
468 goto getconfig_free_rai;
470 rai->rai_reachabletime = (uint32_t)val;
472 MAYHAVE(val64, "retrans", DEF_ADVRETRANSTIMER);
473 if (val64 < 0 || val64 > 0xffffffff) {
474 syslog(LOG_ERR, "<%s> retrans time (%" PRIu64 ") on %s out of range",
475 __func__, val64, ifi->ifi_ifname);
476 goto getconfig_free_rai;
478 rai->rai_retranstimer = (uint32_t)val64;
480 if (agetnum("hapref") != -1 || agetnum("hatime") != -1) {
482 "<%s> mobile-ip6 configuration not supported",
484 goto getconfig_free_rai;
486 /* prefix information */
489 * This is an implementation specific parameter to consider
490 * link propagation delays and poorly synchronized clocks when
491 * checking consistency of advertised lifetimes.
493 MAYHAVE(val, "clockskew", 0);
494 rai->rai_clockskew = val;
497 for (i = -1; i < MAXPREFIX; i++) {
500 makeentry(entbuf, sizeof(entbuf), i, "addr");
501 addr = (char *)agetstr(entbuf, &bp);
505 /* allocate memory to store prefix information */
506 ELM_MALLOC(pfx, exit(1));
507 pfx->pfx_rainfo = rai;
508 pfx->pfx_origin = PREFIX_FROM_CONFIG;
510 if (inet_pton(AF_INET6, addr, &pfx->pfx_prefix) != 1) {
512 "<%s> inet_pton failed for %s",
514 goto getconfig_free_pfx;
516 if (IN6_IS_ADDR_MULTICAST(&pfx->pfx_prefix)) {
518 "<%s> multicast prefix (%s) must "
519 "not be advertised on %s",
520 __func__, addr, ifi->ifi_ifname);
521 goto getconfig_free_pfx;
523 if (IN6_IS_ADDR_LINKLOCAL(&pfx->pfx_prefix))
525 "<%s> link-local prefix (%s) will be"
527 __func__, addr, ifi->ifi_ifname);
529 makeentry(entbuf, sizeof(entbuf), i, "prefixlen");
530 MAYHAVE(val, entbuf, 64);
531 if (val < 0 || val > 128) {
532 syslog(LOG_ERR, "<%s> prefixlen (%" PRIu32 ") for %s "
533 "on %s out of range",
534 __func__, val, addr, ifi->ifi_ifname);
535 goto getconfig_free_pfx;
537 pfx->pfx_prefixlen = (int)val;
539 makeentry(entbuf, sizeof(entbuf), i, "pinfoflags");
540 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
542 if (strchr(flagstr, 'l'))
543 val |= ND_OPT_PI_FLAG_ONLINK;
544 if (strchr(flagstr, 'a'))
545 val |= ND_OPT_PI_FLAG_AUTO;
548 (ND_OPT_PI_FLAG_ONLINK|ND_OPT_PI_FLAG_AUTO));
550 pfx->pfx_onlinkflg = val & ND_OPT_PI_FLAG_ONLINK;
551 pfx->pfx_autoconfflg = val & ND_OPT_PI_FLAG_AUTO;
553 makeentry(entbuf, sizeof(entbuf), i, "vltime");
554 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
555 if (val64 < 0 || val64 > 0xffffffff) {
556 syslog(LOG_ERR, "<%s> vltime (%" PRIu64 ") for "
557 "%s/%d on %s is out of range",
559 addr, pfx->pfx_prefixlen, ifi->ifi_ifname);
560 goto getconfig_free_pfx;
562 pfx->pfx_validlifetime = (uint32_t)val64;
564 makeentry(entbuf, sizeof(entbuf), i, "vltimedecr");
565 if (agetflag(entbuf)) {
568 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
569 pfx->pfx_vltimeexpire =
570 now.tv_sec + pfx->pfx_validlifetime;
573 makeentry(entbuf, sizeof(entbuf), i, "pltime");
574 MAYHAVE(val64, entbuf, DEF_ADVPREFERREDLIFETIME);
575 if (val64 < 0 || val64 > 0xffffffff) {
577 "<%s> pltime (%" PRIu64 ") for %s/%d on %s "
580 addr, pfx->pfx_prefixlen, ifi->ifi_ifname);
581 goto getconfig_free_pfx;
583 pfx->pfx_preflifetime = (uint32_t)val64;
585 makeentry(entbuf, sizeof(entbuf), i, "pltimedecr");
586 if (agetflag(entbuf)) {
589 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
590 pfx->pfx_pltimeexpire =
591 now.tv_sec + pfx->pfx_preflifetime;
593 /* link into chain */
594 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
600 if (rai->rai_advifprefix && rai->rai_pfxs == 0)
603 MAYHAVE(val64, "mtu", 0);
604 if (val < 0 || val64 > 0xffffffff) {
606 "<%s> mtu (%" PRIu64 ") on %s out of range",
607 __func__, val64, ifi->ifi_ifname);
608 goto getconfig_free_rai;
610 rai->rai_linkmtu = (uint32_t)val64;
611 if (rai->rai_linkmtu == 0) {
614 if ((mtustr = (char *)agetstr("mtu", &bp)) &&
615 strcmp(mtustr, "auto") == 0)
616 rai->rai_linkmtu = ifi->ifi_phymtu;
618 else if (rai->rai_linkmtu < IPV6_MMTU ||
619 rai->rai_linkmtu > ifi->ifi_phymtu) {
621 "<%s> advertised link mtu (%" PRIu32 ") on %s is invalid (must "
622 "be between least MTU (%d) and physical link MTU (%d)",
623 __func__, rai->rai_linkmtu, ifi->ifi_ifname,
624 IPV6_MMTU, ifi->ifi_phymtu);
625 goto getconfig_free_rai;
628 #ifdef SIOCSIFINFO_IN6
630 struct in6_ndireq ndi;
633 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
634 syslog(LOG_ERR, "<%s> socket: %s", __func__,
638 memset(&ndi, 0, sizeof(ndi));
639 strncpy(ndi.ifname, ifi->ifi_ifname, sizeof(ndi.ifname));
640 if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&ndi) < 0)
641 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFINFO_IN6 at %s: %s",
642 __func__, ifi->ifi_ifname, strerror(errno));
644 /* reflect the RA info to the host variables in kernel */
645 ndi.ndi.chlim = rai->rai_hoplimit;
646 ndi.ndi.retrans = rai->rai_retranstimer;
647 ndi.ndi.basereachable = rai->rai_reachabletime;
648 if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&ndi) < 0)
649 syslog(LOG_INFO, "<%s> ioctl:SIOCSIFINFO_IN6 at %s: %s",
650 __func__, ifi->ifi_ifname, strerror(errno));
656 /* route information */
658 for (i = -1; i < MAXROUTE; i++) {
661 makeentry(entbuf, sizeof(entbuf), i, "rtprefix");
662 addr = (char *)agetstr(entbuf, &bp);
664 makeentry(oentbuf, sizeof(oentbuf), i, "rtrprefix");
665 addr = (char *)agetstr(oentbuf, &bp);
667 fprintf(stderr, "%s was obsoleted. Use %s.\n",
673 /* allocate memory to store prefix information */
674 ELM_MALLOC(rti, exit(1));
676 if (inet_pton(AF_INET6, addr, &rti->rti_prefix) != 1) {
677 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
679 goto getconfig_free_rti;
683 * XXX: currently there's no restriction in route information
684 * prefix according to
685 * draft-ietf-ipngwg-router-selection-00.txt.
686 * However, I think the similar restriction be necessary.
688 MAYHAVE(val64, entbuf, DEF_ADVVALIDLIFETIME);
689 if (IN6_IS_ADDR_MULTICAST(&rti->prefix)) {
691 "<%s> multicast route (%s) must "
692 "not be advertised on %s",
693 __func__, addr, ifi->ifi_ifname);
694 goto getconfig_free_rti;
696 if (IN6_IS_ADDR_LINKLOCAL(&rti->prefix)) {
698 "<%s> link-local route (%s) will "
699 "be advertised on %s",
700 __func__, addr, ifi->ifi_ifname);
701 goto getconfig_free_rti;
705 makeentry(entbuf, sizeof(entbuf), i, "rtplen");
706 /* XXX: 256 is a magic number for compatibility check. */
707 MAYHAVE(val, entbuf, 256);
709 makeentry(oentbuf, sizeof(oentbuf), i, "rtrplen");
710 MAYHAVE(val, oentbuf, 256);
712 fprintf(stderr, "%s was obsoleted. Use %s.\n",
717 if (val < 0 || val > 128) {
718 syslog(LOG_ERR, "<%s> prefixlen (%" PRIu32 ") for %s on %s "
720 __func__, val, addr, ifi->ifi_ifname);
721 goto getconfig_free_rti;
723 rti->rti_prefixlen = (int)val;
725 makeentry(entbuf, sizeof(entbuf), i, "rtflags");
726 if ((flagstr = (char *)agetstr(entbuf, &bp))) {
728 if (strchr(flagstr, 'h'))
729 val |= ND_RA_FLAG_RTPREF_HIGH;
730 if (strchr(flagstr, 'l')) {
731 if ((val & ND_RA_FLAG_RTPREF_HIGH)) {
733 "<%s> the \'h\' and \'l\' route"
734 " preferences are exclusive",
736 goto getconfig_free_rti;
738 val |= ND_RA_FLAG_RTPREF_LOW;
741 MAYHAVE(val, entbuf, 256); /* XXX */
743 makeentry(oentbuf, sizeof(oentbuf), i, "rtrflags");
744 MAYHAVE(val, oentbuf, 256);
746 fprintf(stderr, "%s was obsoleted. Use %s.\n",
751 rti->rti_rtpref = val & ND_RA_FLAG_RTPREF_MASK;
752 if (rti->rti_rtpref == ND_RA_FLAG_RTPREF_RSV) {
753 syslog(LOG_ERR, "<%s> invalid route preference (%02x) "
755 __func__, rti->rti_rtpref, addr,
756 rti->rti_prefixlen, ifi->ifi_ifname);
757 goto getconfig_free_rti;
761 * Since the spec does not a default value, we should make
762 * this entry mandatory. However, FreeBSD 4.4 has shipped
763 * with this field being optional, we use the router lifetime
764 * as an ad-hoc default value with a warning message.
766 makeentry(entbuf, sizeof(entbuf), i, "rtltime");
767 MAYHAVE(val64, entbuf, -1);
769 makeentry(oentbuf, sizeof(oentbuf), i, "rtrltime");
770 MAYHAVE(val64, oentbuf, -1);
772 fprintf(stderr, "%s was obsoleted. Use %s.\n",
775 fprintf(stderr, "%s should be specified "
776 "for interface %s.\n", entbuf,
778 val64 = rai->rai_lifetime;
781 if (val64 < 0 || val64 > 0xffffffff) {
782 syslog(LOG_ERR, "<%s> route lifetime (%" PRIu64 ") for "
783 "%s/%d on %s out of range", __func__,
784 val64, addr, rti->rti_prefixlen,
786 goto getconfig_free_rti;
788 rti->rti_ltime = (uint32_t)val64;
790 /* link into chain */
791 TAILQ_INSERT_TAIL(&rai->rai_route, rti, rti_next);
798 /* DNS server and DNS search list information */
799 for (i = -1; i < MAXRDNSSENT ; i++) {
801 struct rdnss_addr *rdna;
805 makeentry(entbuf, sizeof(entbuf), i, "rdnss");
806 addr = (char *)agetstr(entbuf, &bp);
809 ELM_MALLOC(rdn, exit(1));
811 TAILQ_INIT(&rdn->rd_list);
813 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
814 c = strcspn(ap, ",");
815 strncpy(abuf, ap, c);
817 ELM_MALLOC(rdna, goto getconfig_free_rdn);
818 if (inet_pton(AF_INET6, abuf, &rdna->ra_dns) != 1) {
819 syslog(LOG_ERR, "<%s> inet_pton failed for %s",
822 goto getconfig_free_rdn;
824 TAILQ_INSERT_TAIL(&rdn->rd_list, rdna, ra_next);
827 makeentry(entbuf, sizeof(entbuf), i, "rdnssltime");
828 MAYHAVE(val, entbuf, (rai->rai_maxinterval * 3 / 2));
829 if ((uint16_t)val < rai->rai_maxinterval ||
830 (uint16_t)val > rai->rai_maxinterval * 2) {
831 syslog(LOG_ERR, "%s (%" PRIu16 ") on %s is invalid "
832 "(must be between %d and %d)",
833 entbuf, val, ifi->ifi_ifname, rai->rai_maxinterval,
834 rai->rai_maxinterval * 2);
835 goto getconfig_free_rdn;
839 /* link into chain */
840 TAILQ_INSERT_TAIL(&rai->rai_rdnss, rdn, rd_next);
843 while ((rdna = TAILQ_FIRST(&rdn->rd_list)) != NULL) {
844 TAILQ_REMOVE(&rdn->rd_list, rdna, ra_next);
850 for (i = -1; i < MAXDNSSLENT ; i++) {
852 struct dnssl_addr *dnsa;
856 makeentry(entbuf, sizeof(entbuf), i, "dnssl");
857 addr = (char *)agetstr(entbuf, &bp);
861 ELM_MALLOC(dns, exit(1));
863 TAILQ_INIT(&dns->dn_list);
865 for (ap = addr; ap - addr < (ssize_t)strlen(addr); ap += c+1) {
866 c = strcspn(ap, ",");
867 strncpy(abuf, ap, c);
869 ELM_MALLOC(dnsa, goto getconfig_free_dns);
870 dnsa->da_len = dname_labelenc(dnsa->da_dom, abuf);
871 syslog(LOG_DEBUG, "<%s>: dnsa->da_len = %d", __func__,
873 TAILQ_INSERT_TAIL(&dns->dn_list, dnsa, da_next);
876 makeentry(entbuf, sizeof(entbuf), i, "dnsslltime");
877 MAYHAVE(val, entbuf, (rai->rai_maxinterval * 3 / 2));
878 if ((uint16_t)val < rai->rai_maxinterval ||
879 (uint16_t)val > rai->rai_maxinterval * 2) {
880 syslog(LOG_ERR, "%s (%" PRIu16 ") on %s is invalid "
881 "(must be between %d and %d)",
882 entbuf, val, ifi->ifi_ifname, rai->rai_maxinterval,
883 rai->rai_maxinterval * 2);
884 goto getconfig_free_dns;
888 /* link into chain */
889 TAILQ_INSERT_TAIL(&rai->rai_dnssl, dns, dn_next);
892 while ((dnsa = TAILQ_FIRST(&dns->dn_list)) != NULL) {
893 TAILQ_REMOVE(&dns->dn_list, dnsa, da_next);
898 /* construct the sending packet */
902 * If an entry with the same ifindex exists, remove it first.
903 * Before the removal, RDNSS and DNSSL options with
904 * zero-lifetime will be sent.
906 switch (ifi->ifi_state) {
907 case IFI_STATE_UNCONFIGURED:
908 /* UNCONFIGURED -> TRANSITIVE */
910 error = sock_mc_join(&sock, ifi->ifi_ifindex);
914 ifi->ifi_state = IFI_STATE_TRANSITIVE;
915 ifi->ifi_burstcount = MAX_INITIAL_RTR_ADVERTISEMENTS;
916 ifi->ifi_burstinterval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
918 /* The same two rai mean initial burst */
919 ifi->ifi_rainfo = rai;
920 ifi->ifi_rainfo_trans = rai;
921 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
923 if (ifi->ifi_ra_timer == NULL)
924 ifi->ifi_ra_timer = rtadvd_add_timer(ra_timeout,
925 ra_timer_update, ifi, ifi);
926 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
927 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
931 "<%s> ifname=%s marked as TRANSITIVE (initial burst).",
932 __func__, ifi->ifi_ifname);
934 case IFI_STATE_CONFIGURED:
935 /* CONFIGURED -> TRANSITIVE */
936 rai_old = ifi->ifi_rainfo;
937 if (rai_old == NULL) {
939 "<%s> ifi_rainfo is NULL"
940 " in IFI_STATE_CONFIGURED.", __func__);
947 rai_old->rai_lifetime = 0;
948 TAILQ_FOREACH(rdn, &rai_old->rai_rdnss, rd_next)
950 TAILQ_FOREACH(dns, &rai_old->rai_dnssl, dn_next)
953 ifi->ifi_rainfo_trans = rai_old;
954 ifi->ifi_state = IFI_STATE_TRANSITIVE;
955 ifi->ifi_burstcount = MAX_FINAL_RTR_ADVERTISEMENTS;
956 ifi->ifi_burstinterval = MIN_DELAY_BETWEEN_RAS;
958 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
959 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
963 "<%s> ifname=%s marked as TRANSITIVE"
964 " (transitional burst)",
965 __func__, ifi->ifi_ifname);
967 ifi->ifi_rainfo = rai;
968 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
970 case IFI_STATE_TRANSITIVE:
971 if (ifi->ifi_rainfo != NULL) {
972 if (ifi->ifi_rainfo == ifi->ifi_rainfo_trans) {
973 /* Reinitialize initial burst */
974 rm_rainfo(ifi->ifi_rainfo);
975 ifi->ifi_rainfo = rai;
976 ifi->ifi_rainfo_trans = rai;
977 ifi->ifi_burstcount =
978 MAX_INITIAL_RTR_ADVERTISEMENTS;
979 ifi->ifi_burstinterval =
980 MAX_INITIAL_RTR_ADVERT_INTERVAL;
982 /* Replace ifi_rainfo with the new one */
983 rm_rainfo(ifi->ifi_rainfo);
984 ifi->ifi_rainfo = rai;
986 TAILQ_INSERT_TAIL(&railist, rai, rai_next);
988 ra_timer_update(ifi, &ifi->ifi_ra_timer->rat_tm);
989 rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
992 /* XXX: NOTREACHED. Being shut down. */
994 "<%s> %s is shutting down. Skipped.",
995 __func__, ifi->ifi_ifname);
1011 get_prefix(struct rainfo *rai)
1013 struct ifaddrs *ifap, *ifa;
1017 char *p, *ep, *m, *lim;
1018 char ntopbuf[INET6_ADDRSTRLEN];
1020 if (getifaddrs(&ifap) < 0) {
1022 "<%s> can't get interface addresses",
1026 ifi = rai->rai_ifinfo;
1028 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1031 if (strcmp(ifa->ifa_name, ifi->ifi_ifname) != 0)
1033 if (ifa->ifa_addr->sa_family != AF_INET6)
1035 a = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
1036 if (IN6_IS_ADDR_LINKLOCAL(a))
1039 /* get prefix length */
1040 m = (char *)&((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr;
1041 lim = (char *)(ifa->ifa_netmask) + ifa->ifa_netmask->sa_len;
1042 plen = prefixlen(m, lim);
1043 if (plen <= 0 || plen > 128) {
1044 syslog(LOG_ERR, "<%s> failed to get prefixlen "
1045 "or prefix is invalid",
1049 if (plen == 128) /* XXX */
1051 if (find_prefix(rai, a, plen)) {
1052 /* ignore a duplicated prefix. */
1056 /* allocate memory to store prefix info. */
1057 ELM_MALLOC(pfx, exit(1));
1059 /* set prefix, sweep bits outside of prefixlen */
1060 pfx->pfx_prefixlen = plen;
1061 memcpy(&pfx->pfx_prefix, a, sizeof(*a));
1062 p = (char *)&pfx->pfx_prefix;
1063 ep = (char *)(&pfx->pfx_prefix + 1);
1064 while (m < lim && p < ep)
1068 if (!inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1070 syslog(LOG_ERR, "<%s> inet_ntop failed", __func__);
1074 "<%s> add %s/%d to prefix list on %s",
1075 __func__, ntopbuf, pfx->pfx_prefixlen, ifi->ifi_ifname);
1077 /* set other fields with protocol defaults */
1078 pfx->pfx_validlifetime = DEF_ADVVALIDLIFETIME;
1079 pfx->pfx_preflifetime = DEF_ADVPREFERREDLIFETIME;
1080 pfx->pfx_onlinkflg = 1;
1081 pfx->pfx_autoconfflg = 1;
1082 pfx->pfx_origin = PREFIX_FROM_KERNEL;
1083 pfx->pfx_rainfo = rai;
1085 /* link into chain */
1086 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
1088 /* counter increment */
1096 makeentry(char *buf, size_t len, int id, const char *string)
1100 strlcpy(buf, string, len);
1102 snprintf(buf, len, "%s%d", string, id);
1106 * Add a prefix to the list of specified interface and reconstruct
1107 * the outgoing packet.
1108 * The prefix must not be in the list.
1109 * XXX: other parameters of the prefix (e.g. lifetime) should be
1110 * able to be specified.
1113 add_prefix(struct rainfo *rai, struct in6_prefixreq *ipr)
1117 char ntopbuf[INET6_ADDRSTRLEN];
1119 ifi = rai->rai_ifinfo;
1120 ELM_MALLOC(pfx, return);
1121 pfx->pfx_prefix = ipr->ipr_prefix.sin6_addr;
1122 pfx->pfx_prefixlen = ipr->ipr_plen;
1123 pfx->pfx_validlifetime = ipr->ipr_vltime;
1124 pfx->pfx_preflifetime = ipr->ipr_pltime;
1125 pfx->pfx_onlinkflg = ipr->ipr_raf_onlink;
1126 pfx->pfx_autoconfflg = ipr->ipr_raf_auto;
1127 pfx->pfx_origin = PREFIX_FROM_DYNAMIC;
1129 TAILQ_INSERT_TAIL(&rai->rai_prefix, pfx, pfx_next);
1130 pfx->pfx_rainfo = rai;
1132 syslog(LOG_DEBUG, "<%s> new prefix %s/%d was added on %s",
1134 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1135 sizeof(ntopbuf)), ipr->ipr_plen, ifi->ifi_ifname);
1141 * Delete a prefix to the list of specified interface and reconstruct
1142 * the outgoing packet.
1143 * The prefix must be in the list.
1146 delete_prefix(struct prefix *pfx)
1150 char ntopbuf[INET6_ADDRSTRLEN];
1152 rai = pfx->pfx_rainfo;
1153 ifi = rai->rai_ifinfo;
1154 TAILQ_REMOVE(&rai->rai_prefix, pfx, pfx_next);
1155 syslog(LOG_DEBUG, "<%s> prefix %s/%d was deleted on %s",
1157 inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1158 sizeof(ntopbuf)), pfx->pfx_prefixlen, ifi->ifi_ifname);
1160 rtadvd_remove_timer(pfx->pfx_timer);
1167 invalidate_prefix(struct prefix *pfx)
1169 struct timespec timo;
1172 char ntopbuf[INET6_ADDRSTRLEN];
1174 rai = pfx->pfx_rainfo;
1175 ifi = rai->rai_ifinfo;
1176 if (pfx->pfx_timer) { /* sanity check */
1178 "<%s> assumption failure: timer already exists",
1183 syslog(LOG_DEBUG, "<%s> prefix %s/%d was invalidated on %s, "
1184 "will expire in %ld seconds", __func__,
1185 inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf, sizeof(ntopbuf)),
1186 pfx->pfx_prefixlen, ifi->ifi_ifname, (long)prefix_timo);
1188 /* set the expiration timer */
1189 pfx->pfx_timer = rtadvd_add_timer(prefix_timeout, NULL, pfx, NULL);
1190 if (pfx->pfx_timer == NULL) {
1191 syslog(LOG_ERR, "<%s> failed to add a timer for a prefix. "
1192 "remove the prefix", __func__);
1195 timo.tv_sec = prefix_timo;
1197 rtadvd_set_timer(&timo, pfx->pfx_timer);
1200 static struct rtadvd_timer *
1201 prefix_timeout(void *arg)
1204 delete_prefix((struct prefix *)arg);
1210 update_prefix(struct prefix *pfx)
1214 char ntopbuf[INET6_ADDRSTRLEN];
1216 rai = pfx->pfx_rainfo;
1217 ifi = rai->rai_ifinfo;
1218 if (pfx->pfx_timer == NULL) { /* sanity check */
1220 "<%s> assumption failure: timer does not exist",
1225 syslog(LOG_DEBUG, "<%s> prefix %s/%d was re-enabled on %s",
1226 __func__, inet_ntop(AF_INET6, &pfx->pfx_prefix, ntopbuf,
1227 sizeof(ntopbuf)), pfx->pfx_prefixlen, ifi->ifi_ifname);
1229 /* stop the expiration timer */
1230 rtadvd_remove_timer(pfx->pfx_timer);
1231 pfx->pfx_timer = NULL;
1235 * Try to get an in6_prefixreq contents for a prefix which matches
1236 * ipr->ipr_prefix and ipr->ipr_plen and belongs to
1237 * the interface whose name is ipr->ipr_name[].
1240 init_prefix(struct in6_prefixreq *ipr)
1245 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1246 syslog(LOG_ERR, "<%s> socket: %s", __func__,
1251 if (ioctl(s, SIOCGIFPREFIX_IN6, (caddr_t)ipr) < 0) {
1252 syslog(LOG_INFO, "<%s> ioctl:SIOCGIFPREFIX %s", __func__,
1255 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1256 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1257 ipr->ipr_raf_onlink = 1;
1258 ipr->ipr_raf_auto = 1;
1259 /* omit other field initialization */
1261 else if (ipr->ipr_origin < PR_ORIG_RR) {
1262 char ntopbuf[INET6_ADDRSTRLEN];
1264 syslog(LOG_WARNING, "<%s> Added prefix(%s)'s origin %d is"
1265 "lower than PR_ORIG_RR(router renumbering)."
1266 "This should not happen if I am router", __func__,
1267 inet_ntop(AF_INET6, &ipr->ipr_prefix.sin6_addr, ntopbuf,
1268 sizeof(ntopbuf)), ipr->ipr_origin);
1276 ipr->ipr_vltime = DEF_ADVVALIDLIFETIME;
1277 ipr->ipr_pltime = DEF_ADVPREFERREDLIFETIME;
1278 ipr->ipr_raf_onlink = 1;
1279 ipr->ipr_raf_auto = 1;
1285 make_prefix(struct rainfo *rai, int ifindex, struct in6_addr *addr, int plen)
1287 struct in6_prefixreq ipr;
1289 memset(&ipr, 0, sizeof(ipr));
1290 if (if_indextoname(ifindex, ipr.ipr_name) == NULL) {
1291 syslog(LOG_ERR, "<%s> Prefix added interface No.%d doesn't "
1292 "exist. This should not happen! %s", __func__,
1293 ifindex, strerror(errno));
1296 ipr.ipr_prefix.sin6_len = sizeof(ipr.ipr_prefix);
1297 ipr.ipr_prefix.sin6_family = AF_INET6;
1298 ipr.ipr_prefix.sin6_addr = *addr;
1299 ipr.ipr_plen = plen;
1301 if (init_prefix(&ipr))
1302 return; /* init failed by some error */
1303 add_prefix(rai, &ipr);
1307 make_packet(struct rainfo *rai)
1309 size_t packlen, lladdroptlen = 0;
1311 struct nd_router_advert *ra;
1312 struct nd_opt_prefix_info *ndopt_pi;
1313 struct nd_opt_mtu *ndopt_mtu;
1314 struct nd_opt_route_info *ndopt_rti;
1316 struct nd_opt_rdnss *ndopt_rdnss;
1318 struct nd_opt_dnssl *ndopt_dnssl;
1324 ifi = rai->rai_ifinfo;
1325 /* calculate total length */
1326 packlen = sizeof(struct nd_router_advert);
1327 if (rai->rai_advlinkopt) {
1328 if ((lladdroptlen = lladdropt_length(&ifi->ifi_sdl)) == 0) {
1330 "<%s> link-layer address option has"
1331 " null length on %s. Treat as not included.",
1332 __func__, ifi->ifi_ifname);
1333 rai->rai_advlinkopt = 0;
1335 packlen += lladdroptlen;
1338 packlen += sizeof(struct nd_opt_prefix_info) * rai->rai_pfxs;
1339 if (rai->rai_linkmtu)
1340 packlen += sizeof(struct nd_opt_mtu);
1342 TAILQ_FOREACH(rti, &rai->rai_route, rti_next)
1343 packlen += sizeof(struct nd_opt_route_info) +
1344 ((rti->rti_prefixlen + 0x3f) >> 6) * 8;
1346 TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
1347 struct rdnss_addr *rdna;
1349 packlen += sizeof(struct nd_opt_rdnss);
1350 TAILQ_FOREACH(rdna, &rdn->rd_list, ra_next)
1351 packlen += sizeof(rdna->ra_dns);
1353 TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
1354 struct dnssl_addr *dnsa;
1356 packlen += sizeof(struct nd_opt_dnssl);
1358 TAILQ_FOREACH(dnsa, &dns->dn_list, da_next)
1359 len += dnsa->da_len;
1361 /* A zero octet and 8 octet boundary */
1363 len += (len % 8) ? 8 - len % 8 : 0;
1367 /* allocate memory for the packet */
1368 if ((buf = malloc(packlen)) == NULL) {
1370 "<%s> can't get enough memory for an RA packet",
1374 memset(buf, 0, packlen);
1375 if (rai->rai_ra_data) /* Free old data if any. */
1376 free(rai->rai_ra_data);
1377 rai->rai_ra_data = buf;
1378 /* XXX: what if packlen > 576? */
1379 rai->rai_ra_datalen = packlen;
1382 * construct the packet
1384 ra = (struct nd_router_advert *)buf;
1385 ra->nd_ra_type = ND_ROUTER_ADVERT;
1387 ra->nd_ra_cksum = 0;
1388 ra->nd_ra_curhoplimit = (uint8_t)(0xff & rai->rai_hoplimit);
1389 ra->nd_ra_flags_reserved = 0; /* just in case */
1391 * XXX: the router preference field, which is a 2-bit field, should be
1392 * initialized before other fields.
1394 ra->nd_ra_flags_reserved = 0xff & rai->rai_rtpref;
1395 ra->nd_ra_flags_reserved |=
1396 rai->rai_managedflg ? ND_RA_FLAG_MANAGED : 0;
1397 ra->nd_ra_flags_reserved |=
1398 rai->rai_otherflg ? ND_RA_FLAG_OTHER : 0;
1399 ra->nd_ra_router_lifetime = htons(rai->rai_lifetime);
1400 ra->nd_ra_reachable = htonl(rai->rai_reachabletime);
1401 ra->nd_ra_retransmit = htonl(rai->rai_retranstimer);
1404 if (rai->rai_advlinkopt) {
1405 lladdropt_fill(&ifi->ifi_sdl, (struct nd_opt_hdr *)buf);
1406 buf += lladdroptlen;
1409 if (rai->rai_linkmtu) {
1410 ndopt_mtu = (struct nd_opt_mtu *)buf;
1411 ndopt_mtu->nd_opt_mtu_type = ND_OPT_MTU;
1412 ndopt_mtu->nd_opt_mtu_len = 1;
1413 ndopt_mtu->nd_opt_mtu_reserved = 0;
1414 ndopt_mtu->nd_opt_mtu_mtu = htonl(rai->rai_linkmtu);
1415 buf += sizeof(struct nd_opt_mtu);
1418 TAILQ_FOREACH(pfx, &rai->rai_prefix, pfx_next) {
1419 uint32_t vltime, pltime;
1420 struct timespec now;
1422 ndopt_pi = (struct nd_opt_prefix_info *)buf;
1423 ndopt_pi->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
1424 ndopt_pi->nd_opt_pi_len = 4;
1425 ndopt_pi->nd_opt_pi_prefix_len = pfx->pfx_prefixlen;
1426 ndopt_pi->nd_opt_pi_flags_reserved = 0;
1427 if (pfx->pfx_onlinkflg)
1428 ndopt_pi->nd_opt_pi_flags_reserved |=
1429 ND_OPT_PI_FLAG_ONLINK;
1430 if (pfx->pfx_autoconfflg)
1431 ndopt_pi->nd_opt_pi_flags_reserved |=
1432 ND_OPT_PI_FLAG_AUTO;
1436 if (pfx->pfx_vltimeexpire || pfx->pfx_pltimeexpire)
1437 clock_gettime(CLOCK_MONOTONIC_FAST, &now);
1438 if (pfx->pfx_vltimeexpire == 0)
1439 vltime = pfx->pfx_validlifetime;
1441 vltime = ((time_t)pfx->pfx_vltimeexpire > now.tv_sec) ?
1442 pfx->pfx_vltimeexpire - now.tv_sec : 0;
1447 if (pfx->pfx_pltimeexpire == 0)
1448 pltime = pfx->pfx_preflifetime;
1450 pltime = ((time_t)pfx->pfx_pltimeexpire > now.tv_sec) ?
1451 pfx->pfx_pltimeexpire - now.tv_sec : 0;
1453 if (vltime < pltime) {
1455 * this can happen if vltime is decrement but pltime
1460 ndopt_pi->nd_opt_pi_valid_time = htonl(vltime);
1461 ndopt_pi->nd_opt_pi_preferred_time = htonl(pltime);
1462 ndopt_pi->nd_opt_pi_reserved2 = 0;
1463 ndopt_pi->nd_opt_pi_prefix = pfx->pfx_prefix;
1465 buf += sizeof(struct nd_opt_prefix_info);
1468 TAILQ_FOREACH(rti, &rai->rai_route, rti_next) {
1469 uint8_t psize = (rti->rti_prefixlen + 0x3f) >> 6;
1471 ndopt_rti = (struct nd_opt_route_info *)buf;
1472 ndopt_rti->nd_opt_rti_type = ND_OPT_ROUTE_INFO;
1473 ndopt_rti->nd_opt_rti_len = 1 + psize;
1474 ndopt_rti->nd_opt_rti_prefixlen = rti->rti_prefixlen;
1475 ndopt_rti->nd_opt_rti_flags = 0xff & rti->rti_rtpref;
1476 ndopt_rti->nd_opt_rti_lifetime = htonl(rti->rti_ltime);
1477 memcpy(ndopt_rti + 1, &rti->rti_prefix, psize * 8);
1478 buf += sizeof(struct nd_opt_route_info) + psize * 8;
1481 TAILQ_FOREACH(rdn, &rai->rai_rdnss, rd_next) {
1482 struct rdnss_addr *rdna;
1484 ndopt_rdnss = (struct nd_opt_rdnss *)buf;
1485 ndopt_rdnss->nd_opt_rdnss_type = ND_OPT_RDNSS;
1486 ndopt_rdnss->nd_opt_rdnss_len = 0;
1487 ndopt_rdnss->nd_opt_rdnss_reserved = 0;
1488 ndopt_rdnss->nd_opt_rdnss_lifetime = htonl(rdn->rd_ltime);
1489 buf += sizeof(struct nd_opt_rdnss);
1491 TAILQ_FOREACH(rdna, &rdn->rd_list, ra_next) {
1492 memcpy(buf, &rdna->ra_dns, sizeof(rdna->ra_dns));
1493 buf += sizeof(rdna->ra_dns);
1495 /* Length field should be in 8 octets */
1496 ndopt_rdnss->nd_opt_rdnss_len = (buf - (char *)ndopt_rdnss) / 8;
1498 syslog(LOG_DEBUG, "<%s>: nd_opt_dnss_len = %d", __func__,
1499 ndopt_rdnss->nd_opt_rdnss_len);
1502 TAILQ_FOREACH(dns, &rai->rai_dnssl, dn_next) {
1503 struct dnssl_addr *dnsa;
1505 ndopt_dnssl = (struct nd_opt_dnssl *)buf;
1506 ndopt_dnssl->nd_opt_dnssl_type = ND_OPT_DNSSL;
1507 ndopt_dnssl->nd_opt_dnssl_len = 0;
1508 ndopt_dnssl->nd_opt_dnssl_reserved = 0;
1509 ndopt_dnssl->nd_opt_dnssl_lifetime = htonl(dns->dn_ltime);
1510 buf += sizeof(*ndopt_dnssl);
1512 TAILQ_FOREACH(dnsa, &dns->dn_list, da_next) {
1513 memcpy(buf, dnsa->da_dom, dnsa->da_len);
1514 buf += dnsa->da_len;
1517 /* A zero octet after encoded DNS server list. */
1520 /* Padding to next 8 octets boundary */
1521 len = buf - (char *)ndopt_dnssl;
1522 len += (len % 8) ? 8 - len % 8 : 0;
1524 /* Length field must be in 8 octets */
1525 ndopt_dnssl->nd_opt_dnssl_len = len / 8;
1527 syslog(LOG_DEBUG, "<%s>: nd_opt_dnssl_len = %d", __func__,
1528 ndopt_dnssl->nd_opt_dnssl_len);