1 /* $FreeBSD: src/sys/netinet6/in6_prefix.c,v 1.4.2.3 2001/07/03 11:01:52 ume Exp $ */
2 /* $DragonFly: src/sys/netinet6/in6_prefix.c,v 1.11 2006/12/22 23:57:53 swildner Exp $ */
3 /* $KAME: in6_prefix.c,v 1.47 2001/03/25 08:41:39 itojun Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
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35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
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39 * modification, are permitted provided that the following conditions
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56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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66 * @(#)in.c 8.2 (Berkeley) 11/15/93
69 #include <sys/param.h>
70 #include <sys/malloc.h>
71 #include <sys/kernel.h>
72 #include <sys/socket.h>
73 #include <sys/socketvar.h>
74 #include <sys/sockio.h>
75 #include <sys/systm.h>
76 #include <sys/syslog.h>
78 #include <sys/thread2.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip6.h>
85 #include <netinet6/in6_prefix.h>
86 #include <netinet6/ip6_var.h>
88 static MALLOC_DEFINE(M_IP6RR, "ip6rr", "IPv6 Router Renumbering Prefix");
89 static MALLOC_DEFINE(M_RR_ADDR, "rp_addr", "IPv6 Router Renumbering Ifid");
91 struct rr_prhead rr_prefix;
93 struct callout in6_rr_timer_ch;
95 #include <net/net_osdep.h>
97 static void add_each_addr (struct socket *so, struct rr_prefix *rpp,
99 static int create_ra_entry (struct rp_addr **rapp);
100 static int add_each_prefix (struct socket *so, struct rr_prefix *rpp);
101 static void free_rp_entries (struct rr_prefix *rpp);
102 static int link_stray_ia6s (struct rr_prefix *rpp);
103 static void rp_remove (struct rr_prefix *rpp);
106 * Copy bits from src to tgt, from off bit for len bits.
107 * Caller must specify collect tgtsize and srcsize.
110 bit_copy(char *tgt, u_int tgtsize, char *src, u_int srcsize,
111 u_int off, u_int len)
115 /* arg values check */
116 if (srcsize < off || srcsize < (off + len) ||
117 tgtsize < off || tgtsize < (off + len)) {
119 "in6_prefix.c: bit_copy: invalid args: srcsize %d,\n"
120 "tgtsize %d, off %d, len %d\n", srcsize, tgtsize, off,
125 /* search start point */
126 for (sp = src, tp = tgt; off >= 8; sp++, tp++)
128 /* copy starting bits */
133 startbits = min((8 - off), len);
135 for (setbit = (0x80 >> off); startbits;
136 setbit >>= 1, startbits--, len--)
137 *tp |= (setbit & *sp);
141 /* copy midium bits */
142 for (; len >= 8; sp++, tp++) {
146 /* copy ending bits */
150 for (setbit = 0x80; len; setbit >>= 1, len--)
151 *tp |= (setbit & *sp);
155 static struct ifprefix *
156 in6_prefixwithifp(struct ifnet *ifp, int plen, struct in6_addr *dst)
158 struct ifprefix *ifpr;
160 /* search matched prefix */
161 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr;
162 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
164 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
165 ifpr->ifpr_type != IN6_PREFIX_RR)
167 if (plen <= in6_matchlen(dst, IFPR_IN6(ifpr)))
174 * Search prefix which matches arg prefix as specified in
175 * draft-ietf-ipngwg-router-renum-08.txt
177 static struct rr_prefix *
178 search_matched_prefix(struct ifnet *ifp, struct in6_prefixreq *ipr)
180 struct ifprefix *ifpr;
182 struct rr_prefix *rpp;
184 /* search matched prefix */
185 ifpr = in6_prefixwithifp(ifp, ipr->ipr_plen,
186 &ipr->ipr_prefix.sin6_addr);
188 return ifpr2rp(ifpr);
191 * search matched addr, and then search prefix
192 * which matches the addr
195 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
197 if (ifa->ifa_addr->sa_family != AF_INET6)
200 in6_matchlen(&ipr->ipr_prefix.sin6_addr, IFA_IN6(ifa)))
206 rpp = ifpr2rp(((struct in6_ifaddr *)ifa)->ia6_ifpr);
210 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr;
211 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
213 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
214 ifpr->ifpr_type != IN6_PREFIX_RR)
216 if (ifpr->ifpr_plen <= in6_matchlen(IFA_IN6(ifa),
221 log(LOG_ERR, "in6_prefix.c: search_matched_prefix: addr %s"
222 "has no pointer to prefix %s\n", ip6_sprintf(IFA_IN6(ifa)),
223 ip6_sprintf(IFPR_IN6(ifpr)));
224 return ifpr2rp(ifpr);
228 * Search prefix which matches arg prefix as specified in
229 * draft-ietf-ipngwg-router-renum-08.txt, and mark it if exists.
230 * Return 1 if anything matched, and 0 if nothing matched.
233 mark_matched_prefixes(u_long cmd, struct ifnet *ifp, struct in6_rrenumreq *irr)
235 struct ifprefix *ifpr;
237 int matchlen, matched = 0;
239 /* search matched prefixes */
240 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr;
241 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
243 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
244 ifpr->ifpr_type != IN6_PREFIX_RR)
246 matchlen = in6_matchlen(&irr->irr_matchprefix.sin6_addr,
248 if (irr->irr_m_minlen > ifpr->ifpr_plen ||
249 irr->irr_m_maxlen < ifpr->ifpr_plen ||
250 irr->irr_m_len > matchlen)
253 ifpr2rp(ifpr)->rp_statef_addmark = 1;
254 if (cmd == SIOCCIFPREFIX_IN6)
255 ifpr2rp(ifpr)->rp_statef_delmark = 1;
259 * search matched addr, and then search prefixes
260 * which matche the addr
262 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
264 struct rr_prefix *rpp;
266 if (ifa->ifa_addr->sa_family != AF_INET6)
268 matchlen = in6_matchlen(&irr->irr_matchprefix.sin6_addr,
270 if (irr->irr_m_minlen > matchlen ||
271 irr->irr_m_maxlen < matchlen || irr->irr_m_len > matchlen)
273 rpp = ifpr2rp(((struct in6_ifaddr *)ifa)->ia6_ifpr);
276 rpp->rp_statef_addmark = 1;
277 if (cmd == SIOCCIFPREFIX_IN6)
278 rpp->rp_statef_delmark = 1;
280 log(LOG_WARNING, "in6_prefix.c: mark_matched_prefixes:"
281 "no back pointer to ifprefix for %s. "
282 "ND autoconfigured addr?\n",
283 ip6_sprintf(IFA_IN6(ifa)));
289 * Mark global prefixes as to be deleted.
292 delmark_global_prefixes(struct ifnet *ifp, struct in6_rrenumreq *irr)
294 struct ifprefix *ifpr;
296 /* search matched prefixes */
297 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr;
298 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
300 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
301 ifpr->ifpr_type != IN6_PREFIX_RR)
303 /* mark delete global prefix */
304 if (in6_addrscope(RP_IN6(ifpr2rp(ifpr))) ==
305 IPV6_ADDR_SCOPE_GLOBAL)
306 ifpr2rp(ifpr)->rp_statef_delmark = 1;
310 /* Unmark prefixes */
312 unmark_prefixes(struct ifnet *ifp)
314 struct ifprefix *ifpr;
316 /* unmark all prefix */
317 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr;
318 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
320 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
321 ifpr->ifpr_type != IN6_PREFIX_RR)
324 ifpr2rp(ifpr)->rp_statef_addmark = 0;
325 ifpr2rp(ifpr)->rp_statef_delmark = 0;
330 init_prefix_ltimes(struct rr_prefix *rpp)
333 if (rpp->rp_pltime == RR_INFINITE_LIFETIME ||
334 rpp->rp_rrf_decrprefd == 0)
335 rpp->rp_preferred = 0;
337 rpp->rp_preferred = time_second + rpp->rp_pltime;
338 if (rpp->rp_vltime == RR_INFINITE_LIFETIME ||
339 rpp->rp_rrf_decrvalid == 0)
342 rpp->rp_expire = time_second + rpp->rp_vltime;
346 rr_are_ifid_equal(struct in6_addr *ii1, struct in6_addr *ii2, int ii_len)
348 int ii_bytelen, ii_bitlen;
349 int p_bytelen, p_bitlen;
353 ii_len > 124) { /* as RFC2373, prefix is at least 4 bit */
354 log(LOG_ERR, "rr_are_ifid_equal: invalid ifid length(%d)\n",
359 ii_bytelen = ii_len / 8;
360 ii_bitlen = ii_len % 8;
362 p_bytelen = sizeof(struct in6_addr) - ii_bytelen - 1;
363 p_bitlen = 8 - ii_bitlen;
365 if (bcmp(ii1->s6_addr + p_bytelen + 1, ii2->s6_addr + p_bytelen + 1,
368 if (((ii1->s6_addr[p_bytelen] << p_bitlen) & 0xff) !=
369 ((ii2->s6_addr[p_bytelen] << p_bitlen) & 0xff))
375 static struct rp_addr *
376 search_ifidwithprefix(struct rr_prefix *rpp, struct in6_addr *ifid)
380 LIST_FOREACH(rap, &rpp->rp_addrhead, ra_entry)
382 if (rr_are_ifid_equal(ifid, &rap->ra_ifid,
383 (sizeof(struct in6_addr) << 3) -
391 assign_ra_entry(struct rr_prefix *rpp, int iilen, struct in6_ifaddr *ia)
396 if ((error = create_ra_entry(&rap)) != 0)
399 /* copy interface id part */
400 bit_copy((caddr_t)&rap->ra_ifid, sizeof(rap->ra_ifid) << 3,
401 (caddr_t)IA6_IN6(ia),
402 sizeof(*IA6_IN6(ia)) << 3, rpp->rp_plen, iilen);
403 /* link to ia, and put into list */
405 IFAREF(&rap->ra_addr->ia_ifa);
406 #if 0 /* Can't do this now, because rpp may be on th stack. should fix it? */
407 ia->ia6_ifpr = rp2ifpr(rpp);
410 LIST_INSERT_HEAD(&rpp->rp_addrhead, rap, ra_entry);
417 * add a link-local address to an interface. we will add new interface address
418 * (prefix database + new interface id).
421 in6_prefix_add_llifid(int iilen, struct in6_ifaddr *ia)
423 struct rr_prefix *rpp;
428 if ((error = create_ra_entry(&rap)) != 0)
430 /* copy interface id part */
431 bit_copy((caddr_t)&rap->ra_ifid, sizeof(rap->ra_ifid) << 3,
432 (caddr_t)IA6_IN6(ia), sizeof(*IA6_IN6(ia)) << 3,
433 64, (sizeof(rap->ra_ifid) << 3) - 64);
434 /* XXX: init dummy so */
435 bzero(&so, sizeof(so));
436 /* insert into list */
437 LIST_FOREACH(rpp, &rr_prefix, rp_entry)
440 * do not attempt to add an address, if ifp does not match
442 if (rpp->rp_ifp != ia->ia_ifp)
446 LIST_INSERT_HEAD(&rpp->rp_addrhead, rap, ra_entry);
448 add_each_addr(&so, rpp, rap);
454 * add an address to an interface. if the interface id portion is new,
455 * we will add new interface address (prefix database + new interface id).
458 in6_prefix_add_ifid(int iilen, struct in6_ifaddr *ia)
460 int plen = (sizeof(*IA6_IN6(ia)) << 3) - iilen;
461 struct ifprefix *ifpr;
465 if (IN6_IS_ADDR_LINKLOCAL(IA6_IN6(ia)))
466 return (in6_prefix_add_llifid(iilen, ia));
467 ifpr = in6_prefixwithifp(ia->ia_ifp, plen, IA6_IN6(ia));
471 int pplen = (plen == 128) ? 64 : plen; /* XXX hardcoded 64 is bad */
473 /* allocate a prefix for ia, with default properties */
476 bzero(&rp, sizeof(rp));
477 rp.rp_type = IN6_PREFIX_RR;
478 rp.rp_ifp = ia->ia_ifp;
480 rp.rp_prefix.sin6_len = sizeof(rp.rp_prefix);
481 rp.rp_prefix.sin6_family = AF_INET6;
482 bit_copy((char *)RP_IN6(&rp), sizeof(*RP_IN6(&rp)) << 3,
483 (char *)&ia->ia_addr.sin6_addr,
484 sizeof(ia->ia_addr.sin6_addr) << 3,
486 rp.rp_vltime = rp.rp_pltime = RR_INFINITE_LIFETIME;
487 rp.rp_raf_onlink = 1;
489 /* Is some FlagMasks for rrf necessary? */
490 rp.rp_rrf_decrvalid = rp.rp_rrf_decrprefd = 0;
491 rp.rp_origin = PR_ORIG_RR; /* can be renumbered */
493 /* create ra_entry */
494 error = link_stray_ia6s(&rp);
496 free_rp_entries(&rp);
500 /* XXX: init dummy so */
501 bzero(&so, sizeof(so));
503 error = add_each_prefix(&so, &rp);
505 /* free each rp_addr entry */
506 free_rp_entries(&rp);
512 ifpr = in6_prefixwithifp(ia->ia_ifp, pplen, IA6_IN6(ia));
516 rap = search_ifidwithprefix(ifpr2rp(ifpr), IA6_IN6(ia));
518 if (rap->ra_addr == NULL) {
520 IFAREF(&rap->ra_addr->ia_ifa);
521 } else if (rap->ra_addr != ia) {
522 /* There may be some inconsistencies between addrs. */
523 log(LOG_ERR, "ip6_prefix.c: addr %s/%d matched prefix"
524 " already has another ia %p(%s) on its ifid list\n",
525 ip6_sprintf(IA6_IN6(ia)), plen,
527 ip6_sprintf(IA6_IN6(rap->ra_addr)));
528 return EADDRINUSE /* XXX */;
533 error = assign_ra_entry(ifpr2rp(ifpr), iilen, ia);
540 in6_prefix_remove_ifid(int iilen, struct in6_ifaddr *ia)
544 if (ia->ia6_ifpr == NULL)
546 rap = search_ifidwithprefix(ifpr2rp(ia->ia6_ifpr), IA6_IN6(ia));
549 LIST_REMOVE(rap, ra_entry);
552 IFAFREE(&rap->ra_addr->ia_ifa);
553 kfree(rap, M_RR_ADDR);
556 if (LIST_EMPTY(&ifpr2rp(ia->ia6_ifpr)->rp_addrhead))
557 rp_remove(ifpr2rp(ia->ia6_ifpr));
561 in6_purgeprefix(struct ifnet *ifp)
563 struct ifprefix *ifpr, *nextifpr;
565 /* delete prefixes before ifnet goes away */
566 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr;
569 nextifpr = TAILQ_NEXT(ifpr, ifpr_list);
570 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
571 ifpr->ifpr_type != IN6_PREFIX_RR)
573 delete_each_prefix(ifpr2rp(ifpr), PR_ORIG_KERNEL);
578 add_each_addr(struct socket *so, struct rr_prefix *rpp, struct rp_addr *rap)
580 struct in6_ifaddr *ia6;
581 struct in6_aliasreq ifra;
585 bzero(&ifra, sizeof(ifra));
586 strncpy(ifra.ifra_name, if_name(rpp->rp_ifp), sizeof(ifra.ifra_name));
587 ifra.ifra_addr.sin6_family = ifra.ifra_prefixmask.sin6_family =
589 ifra.ifra_addr.sin6_len = ifra.ifra_prefixmask.sin6_len =
590 sizeof(ifra.ifra_addr);
591 /* copy prefix part */
592 bit_copy((char *)&ifra.ifra_addr.sin6_addr,
593 sizeof(ifra.ifra_addr.sin6_addr) << 3,
594 (char *)RP_IN6(rpp), sizeof(*RP_IN6(rpp)) << 3,
596 /* copy interface id part */
597 bit_copy((char *)&ifra.ifra_addr.sin6_addr,
598 sizeof(ifra.ifra_addr.sin6_addr) << 3,
599 (char *)&rap->ra_ifid, sizeof(rap->ra_ifid) << 3,
600 rpp->rp_plen, (sizeof(rap->ra_ifid) << 3) - rpp->rp_plen);
601 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, rpp->rp_plen);
602 /* don't care ifra_flags for now */
605 * XXX: if we did this with finite lifetime values, the lifetimes would
606 * decrese in time and never incremented.
607 * we should need more clarifications on the prefix mechanism...
609 ifra.ifra_lifetime.ia6t_vltime = rpp->rp_vltime;
610 ifra.ifra_lifetime.ia6t_pltime = rpp->rp_pltime;
612 ia6 = in6ifa_ifpwithaddr(rpp->rp_ifp, &ifra.ifra_addr.sin6_addr);
614 if (ia6->ia6_ifpr == NULL) {
615 /* link this addr and the prefix each other */
617 IFAFREE(&rap->ra_addr->ia_ifa);
619 IFAREF(&rap->ra_addr->ia_ifa);
620 ia6->ia6_ifpr = rp2ifpr(rpp);
623 if (ia6->ia6_ifpr == rp2ifpr(rpp)) {
625 IFAFREE(&rap->ra_addr->ia_ifa);
627 IFAREF(&rap->ra_addr->ia_ifa);
631 * The addr is already assigned to other
633 * There may be some inconsistencies between
635 * e.g. overraped prefixes with common starting
636 * part and different plefixlen.
637 * Or, completely duplicated prefixes?
641 "in6_prefix.c: add_each_addr: addition of an addr %s/%d "
642 "failed because there is already another addr %s/%d\n",
643 ip6_sprintf(&ifra.ifra_addr.sin6_addr), rpp->rp_plen,
644 ip6_sprintf(IA6_IN6(ia6)),
645 in6_mask2len(&ia6->ia_prefixmask.sin6_addr, NULL));
648 /* propagate ANYCAST flag if it is set for ancestor addr */
649 if (rap->ra_flags.anycast != 0)
650 ifra.ifra_flags |= IN6_IFF_ANYCAST;
651 error = in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, rpp->rp_ifp,
654 log(LOG_ERR, "in6_prefix.c: add_each_addr: addition of an addr"
655 "%s/%d failed because in6_control failed for error %d\n",
656 ip6_sprintf(&ifra.ifra_addr.sin6_addr), rpp->rp_plen,
662 * link beween this addr and the prefix will be done
663 * in in6_prefix_add_ifid
668 rrpr_update(struct socket *so, struct rr_prefix *new)
670 struct rr_prefix *rpp;
671 struct ifprefix *ifpr;
674 /* search existing prefix */
675 for (ifpr = TAILQ_FIRST(&new->rp_ifp->if_prefixhead); ifpr;
676 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
678 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
679 ifpr->ifpr_type != IN6_PREFIX_RR)
681 if (ifpr->ifpr_plen == new->rp_plen &&
682 in6_are_prefix_equal(IFPR_IN6(ifpr), RP_IN6(new),
689 * We got a prefix which we have seen in the past.
692 * If the origin of the already-installed prefix is more
693 * preferable than the new one, ignore installation request.
695 if (rpp->rp_origin > new->rp_origin)
698 /* update prefix information */
699 rpp->rp_flags.prf_ra = new->rp_flags.prf_ra;
700 if (rpp->rp_origin >= PR_ORIG_RR)
701 rpp->rp_flags.prf_rr = new->rp_flags.prf_rr;
702 rpp->rp_vltime = new->rp_vltime;
703 rpp->rp_pltime = new->rp_pltime;
704 rpp->rp_expire = new->rp_expire;
705 rpp->rp_preferred = new->rp_preferred;
706 rpp->rp_statef_delmark = 0; /* cancel deletion */
708 * Interface id related update.
709 * add rp_addr entries in new into rpp, if they have not
710 * been already included in rpp.
712 while (!LIST_EMPTY(&new->rp_addrhead))
714 rap = LIST_FIRST(&new->rp_addrhead);
715 LIST_REMOVE(rap, ra_entry);
716 if (search_ifidwithprefix(rpp, &rap->ra_ifid)
719 IFAFREE(&rap->ra_addr->ia_ifa);
720 kfree(rap, M_RR_ADDR);
724 LIST_INSERT_HEAD(&rpp->rp_addrhead, rap, ra_entry);
729 * We got a fresh prefix.
731 /* create new prefix */
732 rpp = (struct rr_prefix *)kmalloc(sizeof(*rpp), M_IP6RR,
735 log(LOG_ERR, "in6_prefix.c: rrpr_update:%d"
736 ": ENOBUFS for rr_prefix\n", __LINE__);
741 LIST_INIT(&rpp->rp_addrhead);
742 /* move rp_addr entries of new to rpp */
743 while (!LIST_EMPTY(&new->rp_addrhead))
745 rap = LIST_FIRST(&new->rp_addrhead);
746 LIST_REMOVE(rap, ra_entry);
747 LIST_INSERT_HEAD(&rpp->rp_addrhead, rap, ra_entry);
750 /* let rp_ifpr.ifpr_prefix point rr_prefix. */
751 rpp->rp_ifpr.ifpr_prefix = (struct sockaddr *)&rpp->rp_prefix;
752 /* link rr_prefix entry to if_prefixlist */
754 struct ifnet *ifp = rpp->rp_ifp;
755 struct ifprefix *ifpr;
757 if ((ifpr = TAILQ_FIRST(&ifp->if_prefixhead))
759 for ( ; TAILQ_NEXT(ifpr, ifpr_list);
760 ifpr = TAILQ_NEXT(ifpr, ifpr_list))
762 TAILQ_NEXT(ifpr, ifpr_list) = rp2ifpr(rpp);
764 TAILQ_FIRST(&ifp->if_prefixhead) =
766 rp2ifpr(rpp)->ifpr_type = IN6_PREFIX_RR;
768 /* link rr_prefix entry to rr_prefix list */
770 LIST_INSERT_HEAD(&rr_prefix, rpp, rp_entry);
774 if (!new->rp_raf_auto)
778 * Add an address for each interface id, if it is not yet
779 * If it existed but not pointing to the prefix yet,
780 * init the prefix pointer.
782 LIST_FOREACH(rap, &rpp->rp_addrhead, ra_entry)
784 if (rap->ra_addr != NULL) {
785 if (rap->ra_addr->ia6_ifpr == NULL)
786 rap->ra_addr->ia6_ifpr = rp2ifpr(rpp);
789 add_each_addr(so, rpp, rap);
795 add_each_prefix(struct socket *so, struct rr_prefix *rpp)
797 init_prefix_ltimes(rpp);
798 return (rrpr_update(so, rpp));
802 rp_remove(struct rr_prefix *rpp)
805 /* unlink rp_entry from if_prefixlist */
807 struct ifnet *ifp = rpp->rp_ifp;
808 struct ifprefix *ifpr;
810 if ((ifpr = TAILQ_FIRST(&ifp->if_prefixhead)) == rp2ifpr(rpp))
811 TAILQ_FIRST(&ifp->if_prefixhead) =
812 TAILQ_NEXT(ifpr, ifpr_list);
814 while (TAILQ_NEXT(ifpr, ifpr_list) != NULL &&
815 (TAILQ_NEXT(ifpr, ifpr_list) != rp2ifpr(rpp)))
816 ifpr = TAILQ_NEXT(ifpr, ifpr_list);
817 if (TAILQ_NEXT(ifpr, ifpr_list))
818 TAILQ_NEXT(ifpr, ifpr_list) =
819 TAILQ_NEXT(rp2ifpr(rpp), ifpr_list);
821 kprintf("Couldn't unlink rr_prefix from ifp\n");
824 /* unlink rp_entry from rr_prefix list */
825 LIST_REMOVE(rpp, rp_entry);
831 create_ra_entry(struct rp_addr **rapp)
833 *rapp = (struct rp_addr *)kmalloc(sizeof(struct rp_addr), M_RR_ADDR,
836 log(LOG_ERR, "in6_prefix.c: init_newprefix:%d: ENOBUFS"
837 "for rp_addr\n", __LINE__);
840 bzero(*rapp, sizeof(*(*rapp)));
846 init_newprefix(struct in6_rrenumreq *irr, struct ifprefix *ifpr,
847 struct rr_prefix *rpp)
849 struct rp_addr *orap;
852 bzero(rpp, sizeof(*rpp));
853 rpp->rp_type = IN6_PREFIX_RR;
854 rpp->rp_ifp = ifpr->ifpr_ifp;
855 rpp->rp_plen = ifpr->ifpr_plen;
856 rpp->rp_prefix.sin6_len = sizeof(rpp->rp_prefix);
857 rpp->rp_prefix.sin6_family = AF_INET6;
858 bit_copy((char *)RP_IN6(rpp), sizeof(*RP_IN6(rpp)) << 3,
859 (char *)&irr->irr_useprefix.sin6_addr,
860 sizeof(irr->irr_useprefix.sin6_addr) << 3,
861 0, irr->irr_u_uselen);
862 /* copy keeplen part if necessary as necessary len */
863 if (irr->irr_u_uselen < ifpr->ifpr_plen)
864 bit_copy((char *)RP_IN6(rpp), sizeof(*RP_IN6(rpp)) << 3,
865 (char *)IFPR_IN6(ifpr), sizeof(*IFPR_IN6(ifpr)) << 3,
867 min(ifpr->ifpr_plen - irr->irr_u_uselen,
868 irr->irr_u_keeplen));
869 LIST_FOREACH(orap, &(ifpr2rp(ifpr)->rp_addrhead), ra_entry)
874 if ((error = create_ra_entry(&rap)) != 0)
876 rap->ra_ifid = orap->ra_ifid;
877 rap->ra_flags.anycast = (orap->ra_addr != NULL &&
878 (orap->ra_addr->ia6_flags &
879 IN6_IFF_ANYCAST) != 0) ? 1 : 0;
880 LIST_INSERT_HEAD(&rpp->rp_addrhead, rap, ra_entry);
882 rpp->rp_vltime = irr->irr_vltime;
883 rpp->rp_pltime = irr->irr_pltime;
884 rpp->rp_raf_onlink = irr->irr_raf_mask_onlink ? irr->irr_raf_onlink :
885 ifpr2rp(ifpr)->rp_raf_onlink;
886 rpp->rp_raf_auto = irr->irr_raf_mask_auto ? irr->irr_raf_auto :
887 ifpr2rp(ifpr)->rp_raf_auto;
888 /* Is some FlagMasks for rrf necessary? */
889 rpp->rp_rrf = irr->irr_rrf;
890 rpp->rp_origin = irr->irr_origin;
896 free_rp_entries(struct rr_prefix *rpp)
899 * This func is only called with rpp on stack(not on list).
900 * So no crit_enter() here
902 while (!LIST_EMPTY(&rpp->rp_addrhead))
906 rap = LIST_FIRST(&rpp->rp_addrhead);
907 LIST_REMOVE(rap, ra_entry);
909 IFAFREE(&rap->ra_addr->ia_ifa);
910 kfree(rap, M_RR_ADDR);
915 add_useprefixes(struct socket *so, struct ifnet *ifp,
916 struct in6_rrenumreq *irr)
918 struct ifprefix *ifpr, *nextifpr;
922 /* add prefixes to each of marked prefix */
923 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr; ifpr = nextifpr)
925 nextifpr = TAILQ_NEXT(ifpr, ifpr_list);
926 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
927 ifpr->ifpr_type != IN6_PREFIX_RR)
929 if (ifpr2rp(ifpr)->rp_statef_addmark) {
930 if ((error = init_newprefix(irr, ifpr, &rp)) != 0)
932 error = add_each_prefix(so, &rp);
935 /* free each rp_addr entry */
936 free_rp_entries(&rp);
942 unprefer_prefix(struct rr_prefix *rpp)
946 for (rap = rpp->rp_addrhead.lh_first; rap != NULL;
947 rap = rap->ra_entry.le_next) {
948 if (rap->ra_addr == NULL)
950 rap->ra_addr->ia6_lifetime.ia6t_preferred = time_second;
951 rap->ra_addr->ia6_lifetime.ia6t_pltime = 0;
956 delete_each_prefix(struct rr_prefix *rpp, u_char origin)
960 if (rpp->rp_origin > origin)
963 while (rpp->rp_addrhead.lh_first != NULL) {
967 rap = LIST_FIRST(&rpp->rp_addrhead);
972 LIST_REMOVE(rap, ra_entry);
974 if (rap->ra_addr == NULL) {
975 kfree(rap, M_RR_ADDR);
978 rap->ra_addr->ia6_ifpr = NULL;
980 in6_purgeaddr(&rap->ra_addr->ia_ifa);
981 IFAFREE(&rap->ra_addr->ia_ifa);
982 kfree(rap, M_RR_ADDR);
990 delete_prefixes(struct ifnet *ifp, u_char origin)
992 struct ifprefix *ifpr, *nextifpr;
994 /* delete prefixes marked as tobe deleted */
995 for (ifpr = TAILQ_FIRST(&ifp->if_prefixhead); ifpr; ifpr = nextifpr)
997 nextifpr = TAILQ_NEXT(ifpr, ifpr_list);
998 if (ifpr->ifpr_prefix->sa_family != AF_INET6 ||
999 ifpr->ifpr_type != IN6_PREFIX_RR)
1001 if (ifpr2rp(ifpr)->rp_statef_delmark)
1002 delete_each_prefix(ifpr2rp(ifpr), origin);
1007 link_stray_ia6s(struct rr_prefix *rpp)
1011 TAILQ_FOREACH(ifa, &rpp->rp_ifp->if_addrlist, ifa_list) {
1012 struct rp_addr *rap;
1013 struct rr_prefix *orpp;
1016 if (ifa->ifa_addr->sa_family != AF_INET6)
1018 if (rpp->rp_plen > in6_matchlen(RP_IN6(rpp), IFA_IN6(ifa)))
1021 orpp = ifpr2rp(((struct in6_ifaddr *)ifa)->ia6_ifpr);
1023 if (!in6_are_prefix_equal(RP_IN6(orpp), RP_IN6(rpp),
1025 log(LOG_ERR, "in6_prefix.c: link_stray_ia6s:"
1026 "addr %s/%d already linked to a prefix"
1027 "and it matches also %s/%d\n",
1028 ip6_sprintf(IFA_IN6(ifa)), orpp->rp_plen,
1029 ip6_sprintf(RP_IN6(rpp)),
1033 if ((error = assign_ra_entry(rpp,
1034 (sizeof(rap->ra_ifid) << 3) -
1036 (struct in6_ifaddr *)ifa)) != 0)
1042 /* XXX assumes that permission is already checked by the caller */
1044 in6_prefix_ioctl(struct socket *so, u_long cmd, caddr_t data,
1047 struct rr_prefix *rpp, rp_tmp;
1048 struct rp_addr *rap;
1049 struct in6_prefixreq *ipr = (struct in6_prefixreq *)data;
1050 struct in6_rrenumreq *irr = (struct in6_rrenumreq *)data;
1055 * Failsafe for errneous address config program.
1056 * Let's hope rrenumd don't make a mistakes.
1058 if (ipr->ipr_origin <= PR_ORIG_RA)
1059 ipr->ipr_origin = PR_ORIG_STATIC;
1062 case SIOCSGIFPREFIX_IN6:
1063 delmark_global_prefixes(ifp, irr);
1065 case SIOCAIFPREFIX_IN6:
1066 case SIOCCIFPREFIX_IN6:
1067 /* check if preferred lifetime > valid lifetime */
1068 if (irr->irr_pltime > irr->irr_vltime) {
1070 "in6_prefix_ioctl: preferred lifetime"
1071 "(%ld) is greater than valid lifetime(%ld)\n",
1072 (u_long)irr->irr_pltime, (u_long)irr->irr_vltime);
1076 if (mark_matched_prefixes(cmd, ifp, irr)) {
1077 if (irr->irr_u_uselen != 0)
1078 if ((error = add_useprefixes(so, ifp, irr))
1081 if (cmd != SIOCAIFPREFIX_IN6)
1082 delete_prefixes(ifp, irr->irr_origin);
1084 return (EADDRNOTAVAIL);
1086 unmark_prefixes(ifp);
1088 case SIOCGIFPREFIX_IN6:
1089 rpp = search_matched_prefix(ifp, ipr);
1090 if (rpp == NULL || ifp != rpp->rp_ifp)
1091 return (EADDRNOTAVAIL);
1093 ipr->ipr_origin = rpp->rp_origin;
1094 ipr->ipr_plen = rpp->rp_plen;
1095 ipr->ipr_vltime = rpp->rp_vltime;
1096 ipr->ipr_pltime = rpp->rp_pltime;
1097 ipr->ipr_flags = rpp->rp_flags;
1098 ipr->ipr_prefix = rpp->rp_prefix;
1101 case SIOCSIFPREFIX_IN6:
1102 /* check if preferred lifetime > valid lifetime */
1103 if (ipr->ipr_pltime > ipr->ipr_vltime) {
1105 "in6_prefix_ioctl: preferred lifetime"
1106 "(%ld) is greater than valid lifetime(%ld)\n",
1107 (u_long)ipr->ipr_pltime, (u_long)ipr->ipr_vltime);
1113 bzero((caddr_t)&rp_tmp, sizeof(rp_tmp));
1114 rp_tmp.rp_ifp = ifp;
1115 rp_tmp.rp_plen = ipr->ipr_plen;
1116 rp_tmp.rp_prefix = ipr->ipr_prefix;
1117 rp_tmp.rp_vltime = ipr->ipr_vltime;
1118 rp_tmp.rp_pltime = ipr->ipr_pltime;
1119 rp_tmp.rp_flags = ipr->ipr_flags;
1120 rp_tmp.rp_origin = ipr->ipr_origin;
1122 /* create rp_addr entries, usually at least for lladdr */
1123 if ((error = link_stray_ia6s(&rp_tmp)) != 0) {
1124 free_rp_entries(&rp_tmp);
1127 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_list) {
1128 if (ifa->ifa_addr == NULL)
1129 continue; /* just for safety */
1130 if (ifa->ifa_addr->sa_family != AF_INET6)
1132 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa)) == 0)
1135 if ((error = create_ra_entry(&rap)) != 0) {
1136 free_rp_entries(&rp_tmp);
1139 /* copy interface id part */
1140 bit_copy((caddr_t)&rap->ra_ifid,
1141 sizeof(rap->ra_ifid) << 3,
1142 (caddr_t)IFA_IN6(ifa),
1143 sizeof(*IFA_IN6(ifa)) << 3,
1145 (sizeof(rap->ra_ifid) << 3) - rp_tmp.rp_plen);
1146 /* insert into list */
1147 LIST_INSERT_HEAD(&rp_tmp.rp_addrhead, rap, ra_entry);
1150 error = add_each_prefix(so, &rp_tmp);
1152 /* free each rp_addr entry */
1153 free_rp_entries(&rp_tmp);
1156 case SIOCDIFPREFIX_IN6:
1157 rpp = search_matched_prefix(ifp, ipr);
1158 if (rpp == NULL || ifp != rpp->rp_ifp)
1159 return (EADDRNOTAVAIL);
1161 error = delete_each_prefix(rpp, ipr->ipr_origin);
1169 in6_rr_timer(void *ignored_arg)
1171 struct rr_prefix *rpp;
1173 callout_reset(&in6_rr_timer_ch, ip6_rr_prune * hz,
1174 in6_rr_timer, NULL);
1178 rpp = LIST_FIRST(&rr_prefix);
1180 if (rpp->rp_expire && rpp->rp_expire < time_second) {
1181 struct rr_prefix *next_rpp;
1183 next_rpp = LIST_NEXT(rpp, rp_entry);
1184 delete_each_prefix(rpp, PR_ORIG_KERNEL);
1188 if (rpp->rp_preferred && rpp->rp_preferred < time_second)
1189 unprefer_prefix(rpp);
1190 rpp = LIST_NEXT(rpp, rp_entry);