nd6_rtr.c (1d54aa3ba94f4d9883b0746ce45123d5b5be773b) nd6_rtr.c (1272577e22d8f1c1c5b5e88f2624836e93aecb17)
1/* $FreeBSD$ */
2/* $KAME: nd6_rtr.c,v 1.111 2001/04/27 01:37:15 jinmei Exp $ */
3
4/*-
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without

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109/*
110 * Receive Router Solicitation Message - just for routers.
111 * Router solicitation/advertisement is mostly managed by userland program
112 * (rtadvd) so here we have no function like nd6_ra_output().
113 *
114 * Based on RFC 2461
115 */
116void
1/* $FreeBSD$ */
2/* $KAME: nd6_rtr.c,v 1.111 2001/04/27 01:37:15 jinmei Exp $ */
3
4/*-
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without

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109/*
110 * Receive Router Solicitation Message - just for routers.
111 * Router solicitation/advertisement is mostly managed by userland program
112 * (rtadvd) so here we have no function like nd6_ra_output().
113 *
114 * Based on RFC 2461
115 */
116void
117nd6_rs_input(m, off, icmp6len)
118 struct mbuf *m;
119 int off, icmp6len;
117nd6_rs_input(struct mbuf *m, int off, int icmp6len)
120{
121 struct ifnet *ifp = m->m_pkthdr.rcvif;
122 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
123 struct nd_router_solicit *nd_rs;
124 struct in6_addr saddr6 = ip6->ip6_src;
125 char *lladdr = NULL;
126 int lladdrlen = 0;
127 union nd_opts ndopts;

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195/*
196 * Receive Router Advertisement Message.
197 *
198 * Based on RFC 2461
199 * TODO: on-link bit on prefix information
200 * TODO: ND_RA_FLAG_{OTHER,MANAGED} processing
201 */
202void
118{
119 struct ifnet *ifp = m->m_pkthdr.rcvif;
120 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
121 struct nd_router_solicit *nd_rs;
122 struct in6_addr saddr6 = ip6->ip6_src;
123 char *lladdr = NULL;
124 int lladdrlen = 0;
125 union nd_opts ndopts;

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193/*
194 * Receive Router Advertisement Message.
195 *
196 * Based on RFC 2461
197 * TODO: on-link bit on prefix information
198 * TODO: ND_RA_FLAG_{OTHER,MANAGED} processing
199 */
200void
203nd6_ra_input(m, off, icmp6len)
204 struct mbuf *m;
205 int off, icmp6len;
201nd6_ra_input(struct mbuf *m, int off, int icmp6len)
206{
207 struct ifnet *ifp = m->m_pkthdr.rcvif;
208 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
209 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
210 struct nd_router_advert *nd_ra;
211 struct in6_addr saddr6 = ip6->ip6_src;
212 int mcast = 0;
213 union nd_opts ndopts;

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426}
427
428/*
429 * default router list proccessing sub routines
430 */
431
432/* tell the change to user processes watching the routing socket. */
433static void
202{
203 struct ifnet *ifp = m->m_pkthdr.rcvif;
204 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
205 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
206 struct nd_router_advert *nd_ra;
207 struct in6_addr saddr6 = ip6->ip6_src;
208 int mcast = 0;
209 union nd_opts ndopts;

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422}
423
424/*
425 * default router list proccessing sub routines
426 */
427
428/* tell the change to user processes watching the routing socket. */
429static void
434nd6_rtmsg(cmd, rt)
435 int cmd;
436 struct rtentry *rt;
430nd6_rtmsg(int cmd, struct rtentry *rt)
437{
438 struct rt_addrinfo info;
439
440 bzero((caddr_t)&info, sizeof(info));
441 info.rti_info[RTAX_DST] = rt_key(rt);
442 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
443 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
444 if (rt->rt_ifp) {
445 info.rti_info[RTAX_IFP] =
446 TAILQ_FIRST(&rt->rt_ifp->if_addrlist)->ifa_addr;
447 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
448 }
449
450 rt_missmsg(cmd, &info, rt->rt_flags, 0);
451}
452
453void
431{
432 struct rt_addrinfo info;
433
434 bzero((caddr_t)&info, sizeof(info));
435 info.rti_info[RTAX_DST] = rt_key(rt);
436 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
437 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
438 if (rt->rt_ifp) {
439 info.rti_info[RTAX_IFP] =
440 TAILQ_FIRST(&rt->rt_ifp->if_addrlist)->ifa_addr;
441 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
442 }
443
444 rt_missmsg(cmd, &info, rt->rt_flags, 0);
445}
446
447void
454defrouter_addreq(new)
455 struct nd_defrouter *new;
448defrouter_addreq(struct nd_defrouter *new)
456{
457 struct sockaddr_in6 def, mask, gate;
458 struct rtentry *newrt = NULL;
459 int s;
460 int error;
461
462 bzero(&def, sizeof(def));
463 bzero(&mask, sizeof(mask));

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480 }
481 if (error == 0)
482 new->installed = 1;
483 splx(s);
484 return;
485}
486
487struct nd_defrouter *
449{
450 struct sockaddr_in6 def, mask, gate;
451 struct rtentry *newrt = NULL;
452 int s;
453 int error;
454
455 bzero(&def, sizeof(def));
456 bzero(&mask, sizeof(mask));

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473 }
474 if (error == 0)
475 new->installed = 1;
476 splx(s);
477 return;
478}
479
480struct nd_defrouter *
488defrouter_lookup(addr, ifp)
489 struct in6_addr *addr;
490 struct ifnet *ifp;
481defrouter_lookup(struct in6_addr *addr, struct ifnet *ifp)
491{
492 struct nd_defrouter *dr;
493
494 for (dr = TAILQ_FIRST(&nd_defrouter); dr;
495 dr = TAILQ_NEXT(dr, dr_entry)) {
496 if (dr->ifp == ifp && IN6_ARE_ADDR_EQUAL(addr, &dr->rtaddr))
497 return (dr);
498 }
499
500 return (NULL); /* search failed */
501}
502
503/*
504 * Remove the default route for a given router.
505 * This is just a subroutine function for defrouter_select(), and should
506 * not be called from anywhere else.
507 */
508static void
482{
483 struct nd_defrouter *dr;
484
485 for (dr = TAILQ_FIRST(&nd_defrouter); dr;
486 dr = TAILQ_NEXT(dr, dr_entry)) {
487 if (dr->ifp == ifp && IN6_ARE_ADDR_EQUAL(addr, &dr->rtaddr))
488 return (dr);
489 }
490
491 return (NULL); /* search failed */
492}
493
494/*
495 * Remove the default route for a given router.
496 * This is just a subroutine function for defrouter_select(), and should
497 * not be called from anywhere else.
498 */
499static void
509defrouter_delreq(dr)
510 struct nd_defrouter *dr;
500defrouter_delreq(struct nd_defrouter *dr)
511{
512 struct sockaddr_in6 def, mask, gate;
513 struct rtentry *oldrt = NULL;
514
515 bzero(&def, sizeof(def));
516 bzero(&mask, sizeof(mask));
517 bzero(&gate, sizeof(gate));
518

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531
532 dr->installed = 0;
533}
534
535/*
536 * remove all default routes from default router list
537 */
538void
501{
502 struct sockaddr_in6 def, mask, gate;
503 struct rtentry *oldrt = NULL;
504
505 bzero(&def, sizeof(def));
506 bzero(&mask, sizeof(mask));
507 bzero(&gate, sizeof(gate));
508

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521
522 dr->installed = 0;
523}
524
525/*
526 * remove all default routes from default router list
527 */
528void
539defrouter_reset()
529defrouter_reset(void)
540{
541 struct nd_defrouter *dr;
542
543 for (dr = TAILQ_FIRST(&nd_defrouter); dr;
544 dr = TAILQ_NEXT(dr, dr_entry))
545 defrouter_delreq(dr);
546
547 /*
548 * XXX should we also nuke any default routers in the kernel, by
549 * going through them by rtalloc1()?
550 */
551}
552
553void
530{
531 struct nd_defrouter *dr;
532
533 for (dr = TAILQ_FIRST(&nd_defrouter); dr;
534 dr = TAILQ_NEXT(dr, dr_entry))
535 defrouter_delreq(dr);
536
537 /*
538 * XXX should we also nuke any default routers in the kernel, by
539 * going through them by rtalloc1()?
540 */
541}
542
543void
554defrtrlist_del(dr)
555 struct nd_defrouter *dr;
544defrtrlist_del(struct nd_defrouter *dr)
556{
557 struct nd_defrouter *deldr = NULL;
558 struct nd_prefix *pr;
559
560 /*
561 * Flush all the routing table entries that use the router
562 * as a next hop.
563 */

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608 * we do not need to classify the cases by ifdef.
609 *
610 * At this moment, we do not try to install more than one default router,
611 * even when the multipath routing is available, because we're not sure about
612 * the benefits for stub hosts comparing to the risk of making the code
613 * complicated and the possibility of introducing bugs.
614 */
615void
545{
546 struct nd_defrouter *deldr = NULL;
547 struct nd_prefix *pr;
548
549 /*
550 * Flush all the routing table entries that use the router
551 * as a next hop.
552 */

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597 * we do not need to classify the cases by ifdef.
598 *
599 * At this moment, we do not try to install more than one default router,
600 * even when the multipath routing is available, because we're not sure about
601 * the benefits for stub hosts comparing to the risk of making the code
602 * complicated and the possibility of introducing bugs.
603 */
604void
616defrouter_select()
605defrouter_select(void)
617{
618 int s = splnet();
619 struct nd_defrouter *dr, *selected_dr = NULL, *installed_dr = NULL;
620 struct rtentry *rt = NULL;
621 struct llinfo_nd6 *ln = NULL;
622
623 /*
624 * This function should be called only when acting as an autoconfigured

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724 */
725 log(LOG_ERR, "rtpref: impossible RA flag %x\n", dr->flags);
726 return (RTPREF_INVALID);
727 }
728 /* NOTREACHED */
729}
730
731static struct nd_defrouter *
606{
607 int s = splnet();
608 struct nd_defrouter *dr, *selected_dr = NULL, *installed_dr = NULL;
609 struct rtentry *rt = NULL;
610 struct llinfo_nd6 *ln = NULL;
611
612 /*
613 * This function should be called only when acting as an autoconfigured

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713 */
714 log(LOG_ERR, "rtpref: impossible RA flag %x\n", dr->flags);
715 return (RTPREF_INVALID);
716 }
717 /* NOTREACHED */
718}
719
720static struct nd_defrouter *
732defrtrlist_update(new)
733 struct nd_defrouter *new;
721defrtrlist_update(struct nd_defrouter *new)
734{
735 struct nd_defrouter *dr, *n;
736 int s = splnet();
737
738 if ((dr = defrouter_lookup(&new->rtaddr, new->ifp)) != NULL) {
739 /* entry exists */
740 if (new->rtlifetime == 0) {
741 defrtrlist_del(dr);

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810 defrouter_select();
811
812 splx(s);
813
814 return (n);
815}
816
817static struct nd_pfxrouter *
722{
723 struct nd_defrouter *dr, *n;
724 int s = splnet();
725
726 if ((dr = defrouter_lookup(&new->rtaddr, new->ifp)) != NULL) {
727 /* entry exists */
728 if (new->rtlifetime == 0) {
729 defrtrlist_del(dr);

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798 defrouter_select();
799
800 splx(s);
801
802 return (n);
803}
804
805static struct nd_pfxrouter *
818pfxrtr_lookup(pr, dr)
819 struct nd_prefix *pr;
820 struct nd_defrouter *dr;
806pfxrtr_lookup(struct nd_prefix *pr, struct nd_defrouter *dr)
821{
822 struct nd_pfxrouter *search;
823
824 for (search = pr->ndpr_advrtrs.lh_first; search; search = search->pfr_next) {
825 if (search->router == dr)
826 break;
827 }
828
829 return (search);
830}
831
832static void
807{
808 struct nd_pfxrouter *search;
809
810 for (search = pr->ndpr_advrtrs.lh_first; search; search = search->pfr_next) {
811 if (search->router == dr)
812 break;
813 }
814
815 return (search);
816}
817
818static void
833pfxrtr_add(pr, dr)
834 struct nd_prefix *pr;
835 struct nd_defrouter *dr;
819pfxrtr_add(struct nd_prefix *pr, struct nd_defrouter *dr)
836{
837 struct nd_pfxrouter *new;
838
839 new = (struct nd_pfxrouter *)malloc(sizeof(*new), M_IP6NDP, M_NOWAIT);
840 if (new == NULL)
841 return;
842 bzero(new, sizeof(*new));
843 new->router = dr;
844
845 LIST_INSERT_HEAD(&pr->ndpr_advrtrs, new, pfr_entry);
846
847 pfxlist_onlink_check();
848}
849
850static void
820{
821 struct nd_pfxrouter *new;
822
823 new = (struct nd_pfxrouter *)malloc(sizeof(*new), M_IP6NDP, M_NOWAIT);
824 if (new == NULL)
825 return;
826 bzero(new, sizeof(*new));
827 new->router = dr;
828
829 LIST_INSERT_HEAD(&pr->ndpr_advrtrs, new, pfr_entry);
830
831 pfxlist_onlink_check();
832}
833
834static void
851pfxrtr_del(pfr)
852 struct nd_pfxrouter *pfr;
835pfxrtr_del(struct nd_pfxrouter *pfr)
853{
854 LIST_REMOVE(pfr, pfr_entry);
855 free(pfr, M_IP6NDP);
856}
857
858struct nd_prefix *
836{
837 LIST_REMOVE(pfr, pfr_entry);
838 free(pfr, M_IP6NDP);
839}
840
841struct nd_prefix *
859nd6_prefix_lookup(key)
860 struct nd_prefixctl *key;
842nd6_prefix_lookup(struct nd_prefixctl *key)
861{
862 struct nd_prefix *search;
863
864 for (search = nd_prefix.lh_first; search; search = search->ndpr_next) {
865 if (key->ndpr_ifp == search->ndpr_ifp &&
866 key->ndpr_plen == search->ndpr_plen &&
867 in6_are_prefix_equal(&key->ndpr_prefix.sin6_addr,
868 &search->ndpr_prefix.sin6_addr, key->ndpr_plen)) {
869 break;
870 }
871 }
872
873 return (search);
874}
875
876int
843{
844 struct nd_prefix *search;
845
846 for (search = nd_prefix.lh_first; search; search = search->ndpr_next) {
847 if (key->ndpr_ifp == search->ndpr_ifp &&
848 key->ndpr_plen == search->ndpr_plen &&
849 in6_are_prefix_equal(&key->ndpr_prefix.sin6_addr,
850 &search->ndpr_prefix.sin6_addr, key->ndpr_plen)) {
851 break;
852 }
853 }
854
855 return (search);
856}
857
858int
877nd6_prelist_add(pr, dr, newp)
878 struct nd_prefixctl *pr;
879 struct nd_prefix **newp;
880 struct nd_defrouter *dr;
859nd6_prelist_add(struct nd_prefixctl *pr, struct nd_defrouter *dr,
860 struct nd_prefix **newp)
881{
882 struct nd_prefix *new = NULL;
883 int error = 0;
884 int i, s;
885 char ip6buf[INET6_ADDRSTRLEN];
886
887 new = (struct nd_prefix *)malloc(sizeof(*new), M_IP6NDP, M_NOWAIT);
888 if (new == NULL)

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930
931 if (dr)
932 pfxrtr_add(new, dr);
933
934 return 0;
935}
936
937void
861{
862 struct nd_prefix *new = NULL;
863 int error = 0;
864 int i, s;
865 char ip6buf[INET6_ADDRSTRLEN];
866
867 new = (struct nd_prefix *)malloc(sizeof(*new), M_IP6NDP, M_NOWAIT);
868 if (new == NULL)

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910
911 if (dr)
912 pfxrtr_add(new, dr);
913
914 return 0;
915}
916
917void
938prelist_remove(pr)
939 struct nd_prefix *pr;
918prelist_remove(struct nd_prefix *pr)
940{
941 struct nd_pfxrouter *pfr, *next;
942 int e, s;
943 char ip6buf[INET6_ADDRSTRLEN];
944
945 /* make sure to invalidate the prefix until it is really freed. */
946 pr->ndpr_vltime = 0;
947 pr->ndpr_pltime = 0;

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977 }
978 splx(s);
979
980 free(pr, M_IP6NDP);
981
982 pfxlist_onlink_check();
983}
984
919{
920 struct nd_pfxrouter *pfr, *next;
921 int e, s;
922 char ip6buf[INET6_ADDRSTRLEN];
923
924 /* make sure to invalidate the prefix until it is really freed. */
925 pr->ndpr_vltime = 0;
926 pr->ndpr_pltime = 0;

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956 }
957 splx(s);
958
959 free(pr, M_IP6NDP);
960
961 pfxlist_onlink_check();
962}
963
964/*
965 * dr - may be NULL
966 */
967
985static int
968static int
986prelist_update(new, dr, m, mcast)
987 struct nd_prefixctl *new;
988 struct nd_defrouter *dr; /* may be NULL */
989 struct mbuf *m;
990 int mcast;
969prelist_update(struct nd_prefixctl *new, struct nd_defrouter *dr,
970 struct mbuf *m, int mcast)
991{
992 struct in6_ifaddr *ia6 = NULL, *ia6_match = NULL;
993 struct ifaddr *ifa;
994 struct ifnet *ifp = new->ndpr_ifp;
995 struct nd_prefix *pr;
996 int s = splnet();
997 int error = 0;
998 int newprefix = 0;

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1320}
1321
1322/*
1323 * A supplement function used in the on-link detection below;
1324 * detect if a given prefix has a (probably) reachable advertising router.
1325 * XXX: lengthy function name...
1326 */
1327static struct nd_pfxrouter *
971{
972 struct in6_ifaddr *ia6 = NULL, *ia6_match = NULL;
973 struct ifaddr *ifa;
974 struct ifnet *ifp = new->ndpr_ifp;
975 struct nd_prefix *pr;
976 int s = splnet();
977 int error = 0;
978 int newprefix = 0;

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1300}
1301
1302/*
1303 * A supplement function used in the on-link detection below;
1304 * detect if a given prefix has a (probably) reachable advertising router.
1305 * XXX: lengthy function name...
1306 */
1307static struct nd_pfxrouter *
1328find_pfxlist_reachable_router(pr)
1329 struct nd_prefix *pr;
1308find_pfxlist_reachable_router(struct nd_prefix *pr)
1330{
1331 struct nd_pfxrouter *pfxrtr;
1332 struct rtentry *rt;
1333 struct llinfo_nd6 *ln;
1334
1335 for (pfxrtr = LIST_FIRST(&pr->ndpr_advrtrs); pfxrtr;
1336 pfxrtr = LIST_NEXT(pfxrtr, pfr_entry)) {
1337 if ((rt = nd6_lookup(&pfxrtr->router->rtaddr, 0,

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1532 /* Do we need a delay in this case? */
1533 nd6_dad_start((struct ifaddr *)ifa, 0);
1534 }
1535 }
1536 }
1537}
1538
1539int
1309{
1310 struct nd_pfxrouter *pfxrtr;
1311 struct rtentry *rt;
1312 struct llinfo_nd6 *ln;
1313
1314 for (pfxrtr = LIST_FIRST(&pr->ndpr_advrtrs); pfxrtr;
1315 pfxrtr = LIST_NEXT(pfxrtr, pfr_entry)) {
1316 if ((rt = nd6_lookup(&pfxrtr->router->rtaddr, 0,

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1511 /* Do we need a delay in this case? */
1512 nd6_dad_start((struct ifaddr *)ifa, 0);
1513 }
1514 }
1515 }
1516}
1517
1518int
1540nd6_prefix_onlink(pr)
1541 struct nd_prefix *pr;
1519nd6_prefix_onlink(struct nd_prefix *pr)
1542{
1543 struct ifaddr *ifa;
1544 struct ifnet *ifp = pr->ndpr_ifp;
1545 struct sockaddr_in6 mask6;
1546 struct nd_prefix *opr;
1547 u_long rtflags;
1548 int error = 0;
1549 struct rtentry *rt = NULL;

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1646 RT_REMREF(rt);
1647 RT_UNLOCK(rt);
1648 }
1649
1650 return (error);
1651}
1652
1653int
1520{
1521 struct ifaddr *ifa;
1522 struct ifnet *ifp = pr->ndpr_ifp;
1523 struct sockaddr_in6 mask6;
1524 struct nd_prefix *opr;
1525 u_long rtflags;
1526 int error = 0;
1527 struct rtentry *rt = NULL;

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1624 RT_REMREF(rt);
1625 RT_UNLOCK(rt);
1626 }
1627
1628 return (error);
1629}
1630
1631int
1654nd6_prefix_offlink(pr)
1655 struct nd_prefix *pr;
1632nd6_prefix_offlink(struct nd_prefix *pr)
1656{
1657 int error = 0;
1658 struct ifnet *ifp = pr->ndpr_ifp;
1659 struct nd_prefix *opr;
1660 struct sockaddr_in6 sa6, mask6;
1661 struct rtentry *rt = NULL;
1662 char ip6buf[INET6_ADDRSTRLEN];
1663

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1738 if (rt != NULL) {
1739 RTFREE(rt);
1740 }
1741
1742 return (error);
1743}
1744
1745static struct in6_ifaddr *
1633{
1634 int error = 0;
1635 struct ifnet *ifp = pr->ndpr_ifp;
1636 struct nd_prefix *opr;
1637 struct sockaddr_in6 sa6, mask6;
1638 struct rtentry *rt = NULL;
1639 char ip6buf[INET6_ADDRSTRLEN];
1640

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1715 if (rt != NULL) {
1716 RTFREE(rt);
1717 }
1718
1719 return (error);
1720}
1721
1722static struct in6_ifaddr *
1746in6_ifadd(pr, mcast)
1747 struct nd_prefixctl *pr;
1748 int mcast;
1723in6_ifadd(struct nd_prefixctl *pr, int mcast)
1749{
1750 struct ifnet *ifp = pr->ndpr_ifp;
1751 struct ifaddr *ifa;
1752 struct in6_aliasreq ifra;
1753 struct in6_ifaddr *ia, *ib;
1754 int error, plen0;
1755 struct in6_addr mask;
1756 int prefixlen = pr->ndpr_plen;

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1864 return (NULL); /* ifaddr must not have been allocated. */
1865 }
1866
1867 ia = in6ifa_ifpwithaddr(ifp, &ifra.ifra_addr.sin6_addr);
1868
1869 return (ia); /* this is always non-NULL */
1870}
1871
1724{
1725 struct ifnet *ifp = pr->ndpr_ifp;
1726 struct ifaddr *ifa;
1727 struct in6_aliasreq ifra;
1728 struct in6_ifaddr *ia, *ib;
1729 int error, plen0;
1730 struct in6_addr mask;
1731 int prefixlen = pr->ndpr_plen;

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1839 return (NULL); /* ifaddr must not have been allocated. */
1840 }
1841
1842 ia = in6ifa_ifpwithaddr(ifp, &ifra.ifra_addr.sin6_addr);
1843
1844 return (ia); /* this is always non-NULL */
1845}
1846
1847/*
1848 * ia0 - corresponding public address
1849 */
1872int
1850int
1873in6_tmpifadd(ia0, forcegen, delay)
1874 const struct in6_ifaddr *ia0; /* corresponding public address */
1875 int forcegen, delay;
1851in6_tmpifadd(const struct in6_ifaddr *ia0, int forcegen, int delay)
1876{
1877 struct ifnet *ifp = ia0->ia_ifa.ifa_ifp;
1878 struct in6_ifaddr *newia, *ia;
1879 struct in6_aliasreq ifra;
1880 int i, error;
1881 int trylimit = 3; /* XXX: adhoc value */
1882 int updateflags;
1883 u_int32_t randid[2];

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2034}
2035
2036/*
2037 * Delete all the routing table entries that use the specified gateway.
2038 * XXX: this function causes search through all entries of routing table, so
2039 * it shouldn't be called when acting as a router.
2040 */
2041void
1852{
1853 struct ifnet *ifp = ia0->ia_ifa.ifa_ifp;
1854 struct in6_ifaddr *newia, *ia;
1855 struct in6_aliasreq ifra;
1856 int i, error;
1857 int trylimit = 3; /* XXX: adhoc value */
1858 int updateflags;
1859 u_int32_t randid[2];

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2010}
2011
2012/*
2013 * Delete all the routing table entries that use the specified gateway.
2014 * XXX: this function causes search through all entries of routing table, so
2015 * it shouldn't be called when acting as a router.
2016 */
2017void
2042rt6_flush(gateway, ifp)
2043 struct in6_addr *gateway;
2044 struct ifnet *ifp;
2018rt6_flush(struct in6_addr *gateway, struct ifnet *ifp)
2045{
2046 struct radix_node_head *rnh = rt_tables[AF_INET6];
2047 int s = splnet();
2048
2049 /* We'll care only link-local addresses */
2050 if (!IN6_IS_ADDR_LINKLOCAL(gateway)) {
2051 splx(s);
2052 return;
2053 }
2054
2055 RADIX_NODE_HEAD_LOCK(rnh);
2056 rnh->rnh_walktree(rnh, rt6_deleteroute, (void *)gateway);
2057 RADIX_NODE_HEAD_UNLOCK(rnh);
2058 splx(s);
2059}
2060
2061static int
2019{
2020 struct radix_node_head *rnh = rt_tables[AF_INET6];
2021 int s = splnet();
2022
2023 /* We'll care only link-local addresses */
2024 if (!IN6_IS_ADDR_LINKLOCAL(gateway)) {
2025 splx(s);
2026 return;
2027 }
2028
2029 RADIX_NODE_HEAD_LOCK(rnh);
2030 rnh->rnh_walktree(rnh, rt6_deleteroute, (void *)gateway);
2031 RADIX_NODE_HEAD_UNLOCK(rnh);
2032 splx(s);
2033}
2034
2035static int
2062rt6_deleteroute(rn, arg)
2063 struct radix_node *rn;
2064 void *arg;
2036rt6_deleteroute(struct radix_node *rn, void *arg)
2065{
2066#define SIN6(s) ((struct sockaddr_in6 *)s)
2067 struct rtentry *rt = (struct rtentry *)rn;
2068 struct in6_addr *gate = (struct in6_addr *)arg;
2069
2070 if (rt->rt_gateway == NULL || rt->rt_gateway->sa_family != AF_INET6)
2071 return (0);
2072

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2090 return (0);
2091
2092 return (rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
2093 rt_mask(rt), rt->rt_flags, 0));
2094#undef SIN6
2095}
2096
2097int
2037{
2038#define SIN6(s) ((struct sockaddr_in6 *)s)
2039 struct rtentry *rt = (struct rtentry *)rn;
2040 struct in6_addr *gate = (struct in6_addr *)arg;
2041
2042 if (rt->rt_gateway == NULL || rt->rt_gateway->sa_family != AF_INET6)
2043 return (0);
2044

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2062 return (0);
2063
2064 return (rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
2065 rt_mask(rt), rt->rt_flags, 0));
2066#undef SIN6
2067}
2068
2069int
2098nd6_setdefaultiface(ifindex)
2099 int ifindex;
2070nd6_setdefaultiface(int ifindex)
2100{
2101 int error = 0;
2102
2103 if (ifindex < 0 || if_index < ifindex)
2104 return (EINVAL);
2105 if (ifindex != 0 && !ifnet_byindex(ifindex))
2106 return (EINVAL);
2107

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2072 int error = 0;
2073
2074 if (ifindex < 0 || if_index < ifindex)
2075 return (EINVAL);
2076 if (ifindex != 0 && !ifnet_byindex(ifindex))
2077 return (EINVAL);
2078

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