2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1986, 1991, 1993
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31 * @(#)route.c 8.3.1.1 (Berkeley) 2/23/95
34 /************************************************************************
35 * Note: In this file a 'fib' is a "forwarding information base" *
36 * Which is the new name for an in kernel routing (next hop) table. *
37 ***********************************************************************/
40 #include "opt_inet6.h"
41 #include "opt_mrouting.h"
42 #include "opt_route.h"
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/malloc.h>
48 #include <sys/socket.h>
49 #include <sys/sysctl.h>
50 #include <sys/syslog.h>
51 #include <sys/sysproto.h>
53 #include <sys/domain.h>
54 #include <sys/eventhandler.h>
55 #include <sys/kernel.h>
57 #include <sys/rmlock.h>
60 #include <net/if_var.h>
61 #include <net/if_dl.h>
62 #include <net/route.h>
63 #include <net/route/route_ctl.h>
64 #include <net/route/route_var.h>
65 #include <net/route/nhop.h>
69 #include <net/radix_mpath.h>
72 #include <netinet/in.h>
73 #include <netinet/ip_mroute.h>
76 * By default add routes to all fibs for new interfaces.
77 * Once this is set to 0 then only allocate routes on interface
78 * changes for the FIB of the caller when adding a new set of addresses
79 * to an interface. XXX this is a shotgun aproach to a problem that needs
80 * a more fine grained solution.. that will come.
81 * XXX also has the problems getting the FIB from curthread which will not
82 * always work given the fib can be overridden and prefixes can be added
83 * from the network stack context.
85 VNET_DEFINE(u_int, rt_add_addr_allfibs) = 1;
86 SYSCTL_UINT(_net, OID_AUTO, add_addr_allfibs, CTLFLAG_RWTUN | CTLFLAG_VNET,
87 &VNET_NAME(rt_add_addr_allfibs), 0, "");
89 VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat);
91 VNET_PCPUSTAT_SYSINIT(rtstat);
93 VNET_PCPUSTAT_SYSUNINIT(rtstat);
96 EVENTHANDLER_LIST_DEFINE(rt_addrmsg);
98 static int rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *,
100 static int rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info,
104 * route initialization must occur before ip6_init2(), which happenas at
113 SYSINIT(route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, NULL);
116 rt_table_init(int offset, int family, u_int fibnum)
120 rh = malloc(sizeof(struct rib_head), M_RTABLE, M_WAITOK | M_ZERO);
122 /* TODO: These details should be hidded inside radix.c */
123 /* Init masks tree */
124 rn_inithead_internal(&rh->head, rh->rnh_nodes, offset);
125 rn_inithead_internal(&rh->rmhead.head, rh->rmhead.mask_nodes, 0);
126 rh->head.rnh_masks = &rh->rmhead;
128 /* Save metadata associated with this routing table. */
129 rh->rib_family = family;
130 rh->rib_fibnum = fibnum;
132 rh->rib_vnet = curvnet;
142 /* Init subscription system */
143 rib_init_subscriptions(rh);
145 /* Finally, set base callbacks */
146 rh->rnh_addaddr = rn_addroute;
147 rh->rnh_deladdr = rn_delete;
148 rh->rnh_matchaddr = rn_match;
149 rh->rnh_lookup = rn_lookup;
150 rh->rnh_walktree = rn_walktree;
151 rh->rnh_walktree_from = rn_walktree_from;
157 rt_freeentry(struct radix_node *rn, void *arg)
159 struct radix_head * const rnh = arg;
160 struct radix_node *x;
162 x = (struct radix_node *)rn_delete(rn + 2, NULL, rnh);
169 rt_table_destroy(struct rib_head *rh)
172 tmproutes_destroy(rh);
174 rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head);
176 nhops_destroy_rib(rh);
178 rib_destroy_subscriptions(rh);
180 /* Assume table is already empty */
181 RIB_LOCK_DESTROY(rh);
186 * Adds a temporal redirect entry to the routing table.
187 * @fibnum: fib number
188 * @dst: destination to install redirect to
189 * @gateway: gateway to go via
190 * @author: sockaddr of originating router, can be NULL
191 * @ifp: interface to use for the redirected route
192 * @flags: set of flags to add. Allowed: RTF_GATEWAY
193 * @lifetime_sec: time in seconds to expire this redirect.
195 * Retuns 0 on success, errno otherwise.
198 rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway,
199 struct sockaddr *author, struct ifnet *ifp, int flags, int lifetime_sec)
201 struct rib_cmd_info rc;
203 struct rt_addrinfo info;
204 struct rt_metrics rti_rmx;
209 if (rt_tables_get_rnh(fibnum, dst->sa_family) == NULL)
210 return (EAFNOSUPPORT);
212 /* Verify the allowed flag mask. */
213 KASSERT(((flags & ~(RTF_GATEWAY)) == 0),
214 ("invalid redirect flags: %x", flags));
215 flags |= RTF_HOST | RTF_DYNAMIC;
217 /* Get the best ifa for the given interface and gateway. */
218 if ((ifa = ifaof_ifpforaddr(gateway, ifp)) == NULL)
219 return (ENETUNREACH);
222 bzero(&info, sizeof(info));
223 info.rti_info[RTAX_DST] = dst;
224 info.rti_info[RTAX_GATEWAY] = gateway;
227 info.rti_flags = flags;
229 /* Setup route metrics to define expire time. */
230 bzero(&rti_rmx, sizeof(rti_rmx));
231 /* Set expire time as absolute. */
232 rti_rmx.rmx_expire = lifetime_sec + time_second;
233 info.rti_mflags |= RTV_EXPIRE;
234 info.rti_rmx = &rti_rmx;
236 error = rib_action(fibnum, RTM_ADD, &info, &rc);
240 /* TODO: add per-fib redirect stats. */
244 RTSTAT_INC(rts_dynamic);
246 /* Send notification of a route addition to userland. */
247 bzero(&info, sizeof(info));
248 info.rti_info[RTAX_DST] = dst;
249 info.rti_info[RTAX_GATEWAY] = gateway;
250 info.rti_info[RTAX_AUTHOR] = author;
251 rt_missmsg_fib(RTM_REDIRECT, &info, flags | RTF_UP, error, fibnum);
257 * Routing table ioctl interface.
260 rtioctl_fib(u_long req, caddr_t data, u_int fibnum)
264 * If more ioctl commands are added here, make sure the proper
265 * super-user checks are being performed because it is possible for
266 * prison-root to make it this far if raw sockets have been enabled
270 /* Multicast goop, grrr... */
271 return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP;
278 ifa_ifwithroute(int flags, const struct sockaddr *dst,
279 const struct sockaddr *gateway, u_int fibnum)
284 if ((flags & RTF_GATEWAY) == 0) {
286 * If we are adding a route to an interface,
287 * and the interface is a pt to pt link
288 * we should search for the destination
289 * as our clue to the interface. Otherwise
290 * we can use the local address.
293 if (flags & RTF_HOST)
294 ifa = ifa_ifwithdstaddr(dst, fibnum);
296 ifa = ifa_ifwithaddr(gateway);
299 * If we are adding a route to a remote net
300 * or host, the gateway may still be on the
301 * other end of a pt to pt link.
303 ifa = ifa_ifwithdstaddr(gateway, fibnum);
306 ifa = ifa_ifwithnet(gateway, 0, fibnum);
308 struct nhop_object *nh;
310 nh = rib_lookup(fibnum, gateway, NHR_NONE, 0);
313 * dismiss a gateway that is reachable only
314 * through the default router
316 if ((nh == NULL) || (nh->nh_flags & NHF_DEFAULT))
320 if (ifa->ifa_addr->sa_family != dst->sa_family) {
321 struct ifaddr *oifa = ifa;
322 ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp);
331 * Copy most of @rt data into @info.
333 * If @flags contains NHR_COPY, copies dst,netmask and gw to the
334 * pointers specified by @info structure. Assume such pointers
335 * are zeroed sockaddr-like structures with sa_len field initialized
336 * to reflect size of the provided buffer. if no NHR_COPY is specified,
337 * point dst,netmask and gw @info fields to appropriate @rt values.
339 * if @flags contains NHR_REF, do refcouting on rt_ifp and rt_ifa.
341 * Returns 0 on success.
344 rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info, int flags)
346 struct rt_metrics *rmx;
347 struct sockaddr *src, *dst;
348 struct nhop_object *nh;
352 if (flags & NHR_COPY) {
353 /* Copy destination if dst is non-zero */
355 dst = info->rti_info[RTAX_DST];
356 sa_len = src->sa_len;
358 if (src->sa_len > dst->sa_len)
360 memcpy(dst, src, src->sa_len);
361 info->rti_addrs |= RTA_DST;
364 /* Copy mask if set && dst is non-zero */
366 dst = info->rti_info[RTAX_NETMASK];
367 if (src != NULL && dst != NULL) {
369 * Radix stores different value in sa_len,
370 * assume rt_mask() to have the same length
373 if (sa_len > dst->sa_len)
375 memcpy(dst, src, src->sa_len);
376 info->rti_addrs |= RTA_NETMASK;
379 /* Copy gateway is set && dst is non-zero */
381 dst = info->rti_info[RTAX_GATEWAY];
382 if ((nhop_get_rtflags(nh) & RTF_GATEWAY) &&
383 src != NULL && dst != NULL) {
384 if (src->sa_len > dst->sa_len)
386 memcpy(dst, src, src->sa_len);
387 info->rti_addrs |= RTA_GATEWAY;
390 info->rti_info[RTAX_DST] = rt_key(rt);
391 info->rti_addrs |= RTA_DST;
392 if (rt_mask(rt) != NULL) {
393 info->rti_info[RTAX_NETMASK] = rt_mask(rt);
394 info->rti_addrs |= RTA_NETMASK;
396 if (nhop_get_rtflags(nh) & RTF_GATEWAY) {
397 info->rti_info[RTAX_GATEWAY] = &nh->gw_sa;
398 info->rti_addrs |= RTA_GATEWAY;
404 info->rti_mflags |= RTV_MTU;
405 rmx->rmx_mtu = nh->nh_mtu;
408 info->rti_flags = rt->rte_flags | nhop_get_rtflags(nh);
409 info->rti_ifp = nh->nh_ifp;
410 info->rti_ifa = nh->nh_ifa;
411 if (flags & NHR_REF) {
412 if_ref(info->rti_ifp);
413 ifa_ref(info->rti_ifa);
420 * Lookups up route entry for @dst in RIB database for fib @fibnum.
421 * Exports entry data to @info using rt_exportinfo().
423 * If @flags contains NHR_REF, refcouting is performed on rt_ifp and rt_ifa.
424 * All references can be released later by calling rib_free_info().
426 * Returns 0 on success.
427 * Returns ENOENT for lookup failure, ENOMEM for export failure.
430 rib_lookup_info(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags,
431 uint32_t flowid, struct rt_addrinfo *info)
435 struct radix_node *rn;
439 KASSERT((fibnum < rt_numfibs), ("rib_lookup_rte: bad fibnum"));
440 rh = rt_tables_get_rnh(fibnum, dst->sa_family);
445 rn = rh->rnh_matchaddr(__DECONST(void *, dst), &rh->head);
446 if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
448 /* Ensure route & ifp is UP */
449 if (RT_LINK_IS_UP(rt->rt_nhop->nh_ifp)) {
450 flags = (flags & NHR_REF) | NHR_COPY;
451 error = rt_exportinfo(rt, info, flags);
463 * Releases all references acquired by rib_lookup_info() when
464 * called with NHR_REF flags.
467 rib_free_info(struct rt_addrinfo *info)
470 ifa_free(info->rti_ifa);
471 if_rele(info->rti_ifp);
475 * Iterates over all existing fibs in system calling
476 * @setwa_f function prior to traversing each fib.
477 * Calls @wa_f function for each element in current fib.
478 * If af is not AF_UNSPEC, iterates over fibs in particular
482 rt_foreach_fib_walk(int af, rt_setwarg_t *setwa_f, rt_walktree_f_t *wa_f,
485 struct rib_head *rnh;
489 for (fibnum = 0; fibnum < rt_numfibs; fibnum++) {
490 /* Do we want some specific family? */
491 if (af != AF_UNSPEC) {
492 rnh = rt_tables_get_rnh(fibnum, af);
496 setwa_f(rnh, fibnum, af, arg);
499 rnh->rnh_walktree(&rnh->head, (walktree_f_t *)wa_f,arg);
504 for (i = 1; i <= AF_MAX; i++) {
505 rnh = rt_tables_get_rnh(fibnum, i);
509 setwa_f(rnh, fibnum, i, arg);
512 rnh->rnh_walktree(&rnh->head, (walktree_f_t *)wa_f,arg);
519 * Iterates over all existing fibs in system and deletes each element
520 * for which @filter_f function returns non-zero value.
521 * If @family is not AF_UNSPEC, iterates over fibs in particular
525 rt_foreach_fib_walk_del(int family, rt_filter_f_t *filter_f, void *arg)
530 for (fibnum = 0; fibnum < rt_numfibs; fibnum++) {
531 /* Do we want some specific family? */
532 if (family != AF_UNSPEC) {
540 for (i = start; i <= end; i++) {
541 if (rt_tables_get_rnh(fibnum, i) == NULL)
544 rib_walk_del(fibnum, i, filter_f, arg, 0);
550 * Delete Routes for a Network Interface
552 * Called for each routing entry via the rnh->rnh_walktree() call above
553 * to delete all route entries referencing a detaching network interface.
556 * rt pointer to rtentry
558 * arg argument passed to rnh->rnh_walktree() - detaching interface
562 * errno failed - reason indicated
565 rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg)
567 struct ifnet *ifp = arg;
569 if (nh->nh_ifp != ifp)
573 * Protect (sorta) against walktree recursion problems
576 if ((rt->rte_flags & RTF_UP) == 0)
583 * Delete all remaining routes using this interface
584 * Unfortuneatly the only way to do this is to slog through
585 * the entire routing table looking for routes which point
586 * to this interface...oh well...
589 rt_flushifroutes_af(struct ifnet *ifp, int af)
591 KASSERT((af >= 1 && af <= AF_MAX), ("%s: af %d not >= 1 and <= %d",
592 __func__, af, AF_MAX));
594 rt_foreach_fib_walk_del(af, rt_ifdelroute, ifp);
598 rt_flushifroutes(struct ifnet *ifp)
601 rt_foreach_fib_walk_del(AF_UNSPEC, rt_ifdelroute, ifp);
605 * Look up rt_addrinfo for a specific fib. Note that if rti_ifa is defined,
606 * it will be referenced so the caller must free it.
608 * Assume basic consistency checks are executed by callers:
609 * RTAX_DST exists, if RTF_GATEWAY is set, RTAX_GATEWAY exists as well.
612 rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum)
614 const struct sockaddr *dst, *gateway, *ifpaddr, *ifaaddr;
615 struct epoch_tracker et;
616 int needref, error, flags;
618 dst = info->rti_info[RTAX_DST];
619 gateway = info->rti_info[RTAX_GATEWAY];
620 ifpaddr = info->rti_info[RTAX_IFP];
621 ifaaddr = info->rti_info[RTAX_IFA];
622 flags = info->rti_flags;
625 * ifp may be specified by sockaddr_dl
626 * when protocol address is ambiguous.
629 needref = (info->rti_ifa == NULL);
632 /* If we have interface specified by the ifindex in the address, use it */
633 if (info->rti_ifp == NULL && ifpaddr != NULL &&
634 ifpaddr->sa_family == AF_LINK) {
635 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)ifpaddr;
636 if (sdl->sdl_index != 0)
637 info->rti_ifp = ifnet_byindex(sdl->sdl_index);
640 * If we have source address specified, try to find it
641 * TODO: avoid enumerating all ifas on all interfaces.
643 if (info->rti_ifa == NULL && ifaaddr != NULL)
644 info->rti_ifa = ifa_ifwithaddr(ifaaddr);
645 if (info->rti_ifa == NULL) {
646 const struct sockaddr *sa;
649 * Most common use case for the userland-supplied routes.
651 * Choose sockaddr to select ifa.
652 * -- if ifp is set --
653 * Order of preference:
656 * Note: for interface routes link-level gateway address
657 * is specified to indicate the interface index without
658 * specifying RTF_GATEWAY. In this case, ignore gateway
659 * Note: gateway AF may be different from dst AF. In this case,
661 * 3) final destination.
662 * 4) if all of these fails, try to get at least link-level ifa.
664 * try to lookup gateway or dst in the routing table to get ifa
666 if (info->rti_info[RTAX_IFA] != NULL)
667 sa = info->rti_info[RTAX_IFA];
668 else if ((info->rti_flags & RTF_GATEWAY) != 0 &&
669 gateway->sa_family == dst->sa_family)
673 if (info->rti_ifp != NULL) {
674 info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp);
676 if (info->rti_ifa == NULL && gateway != NULL)
677 info->rti_ifa = ifaof_ifpforaddr(gateway, info->rti_ifp);
678 } else if (dst != NULL && gateway != NULL)
679 info->rti_ifa = ifa_ifwithroute(flags, dst, gateway,
682 info->rti_ifa = ifa_ifwithroute(flags, sa, sa,
685 if (needref && info->rti_ifa != NULL) {
686 if (info->rti_ifp == NULL)
687 info->rti_ifp = info->rti_ifa->ifa_ifp;
688 ifa_ref(info->rti_ifa);
696 rt_updatemtu(struct ifnet *ifp)
698 struct rib_head *rnh;
703 * Try to update rt_mtu for all routes using this interface
704 * Unfortunately the only way to do this is to traverse all
705 * routing tables in all fibs/domains.
707 for (i = 1; i <= AF_MAX; i++) {
708 mtu = if_getmtu_family(ifp, i);
709 for (j = 0; j < rt_numfibs; j++) {
710 rnh = rt_tables_get_rnh(j, i);
713 nhops_update_ifmtu(rnh, ifp, mtu);
719 int p_sockaddr(char *buf, int buflen, struct sockaddr *s);
720 int rt_print(char *buf, int buflen, struct rtentry *rt);
723 p_sockaddr(char *buf, int buflen, struct sockaddr *s)
727 switch (s->sa_family) {
729 paddr = &((struct sockaddr_in *)s)->sin_addr;
732 paddr = &((struct sockaddr_in6 *)s)->sin6_addr;
739 if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL)
742 return (strlen(buf));
746 rt_print(char *buf, int buflen, struct rtentry *rt)
748 struct sockaddr *addr, *mask;
754 i = p_sockaddr(buf, buflen, addr);
755 if (!(rt->rt_flags & RTF_HOST)) {
757 i += p_sockaddr(buf + i, buflen - i, mask);
760 if (rt->rt_flags & RTF_GATEWAY) {
762 i += p_sockaddr(buf + i, buflen - i, &rt->rt_nhop->gw_sa);
771 * Deletes key for single-path routes, unlinks rtentry with
772 * gateway specified in @info from multi-path routes.
774 * Returnes unlinked entry. In case of failure, returns NULL
775 * and sets @perror to ESRCH.
778 rt_mpath_unlink(struct rib_head *rnh, struct rt_addrinfo *info,
779 struct rtentry *rto, int *perror)
782 * if we got multipath routes, we require users to specify
783 * a matching RTAX_GATEWAY.
785 struct rtentry *rt; // *rto = NULL;
786 struct radix_node *rn;
789 gw = info->rti_info[RTAX_GATEWAY];
790 rt = rt_mpath_matchgate(rto, gw);
797 * this is the first entry in the chain
800 rn = rn_mpath_next((struct radix_node *)rt);
802 * there is another entry, now it's active
806 rto->rte_flags |= RTF_UP;
807 } else if (rt->rte_flags & RTF_GATEWAY) {
809 * For gateway routes, we need to
810 * make sure that we we are deleting
811 * the correct gateway.
812 * rt_mpath_matchgate() does not
813 * check the case when there is only
814 * one route in the chain.
817 (rt->rt_nhop->gw_sa.sa_len != gw->sa_len ||
818 memcmp(&rt->rt_nhop->gw_sa, gw, gw->sa_len))) {
825 * use the normal delete code to remove
828 rn = rnh->rnh_deladdr(info->rti_info[RTAX_DST],
829 info->rti_info[RTAX_NETMASK],
840 * if the entry is 2nd and on up
842 if (rt_mpath_deldup(rto, rt) == 0)
843 panic ("rtrequest1: rt_mpath_deldup");
845 rn = (struct radix_node *)rt;
851 rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask)
853 u_char *cp1 = (u_char *)src;
854 u_char *cp2 = (u_char *)dst;
855 u_char *cp3 = (u_char *)netmask;
856 u_char *cplim = cp2 + *cp3;
857 u_char *cplim2 = cp2 + *cp1;
859 *cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */
864 *cp2++ = *cp1++ & *cp3++;
866 bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2));
870 * Set up a routing table entry, normally
874 rtinit1(struct ifaddr *ifa, int cmd, int flags, int fibnum)
877 struct epoch_tracker et;
878 struct sockaddr *dst;
879 struct sockaddr *netmask;
880 struct rib_cmd_info rc;
881 struct rt_addrinfo info;
883 int startfib, endfib;
884 struct sockaddr_storage ss;
887 struct sockaddr_dl_short sdl;
888 struct rib_head *rnh;
890 if (flags & RTF_HOST) {
891 dst = ifa->ifa_dstaddr;
895 netmask = ifa->ifa_netmask;
897 if (dst->sa_len == 0)
899 switch (dst->sa_family) {
902 /* We support multiple FIBs. */
905 fibnum = RT_DEFAULT_FIB;
908 if (fibnum == RT_ALL_FIBS) {
909 if (V_rt_add_addr_allfibs == 0 && cmd == (int)RTM_ADD)
910 startfib = endfib = ifa->ifa_ifp->if_fib;
913 endfib = rt_numfibs - 1;
916 KASSERT((fibnum < rt_numfibs), ("rtinit1: bad fibnum"));
922 * If it's a delete, check that if it exists,
923 * it's on the correct interface or we might scrub
924 * a route to another ifa which would
925 * be confusing at best and possibly worse.
927 if (cmd == RTM_DELETE) {
929 * It's a delete, so it should already exist..
930 * If it's a net, mask off the host bits
931 * (Assuming we have a mask)
932 * XXX this is kinda inet specific..
934 if (netmask != NULL) {
935 rt_maskedcopy(dst, (struct sockaddr *)&ss, netmask);
936 dst = (struct sockaddr *)&ss;
939 bzero(&sdl, sizeof(struct sockaddr_dl_short));
940 sdl.sdl_family = AF_LINK;
941 sdl.sdl_len = sizeof(struct sockaddr_dl_short);
942 sdl.sdl_type = ifa->ifa_ifp->if_type;
943 sdl.sdl_index = ifa->ifa_ifp->if_index;
945 * Now go through all the requested tables (fibs) and do the
946 * requested action. Realistically, this will either be fib 0
947 * for protocols that don't do multiple tables or all the
948 * tables for those that do.
950 for ( fibnum = startfib; fibnum <= endfib; fibnum++) {
951 if (cmd == RTM_DELETE) {
952 struct radix_node *rn;
954 * Look up an rtentry that is in the routing tree and
955 * contains the correct info.
957 rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
959 /* this table doesn't exist but others might */
962 rn = rnh->rnh_lookup(dst, netmask, &rnh->head);
964 if (rt_mpath_capable(rnh)) {
968 struct rtentry *rt = RNTORT(rn);
970 * for interface route the gateway
971 * gateway is sockaddr_dl, so
972 * rt_mpath_matchgate must use the
975 rt = rt_mpath_matchgate(rt,
982 error = (rn == NULL ||
983 (rn->rn_flags & RNF_ROOT) ||
984 RNTORT(rn)->rt_nhop->nh_ifa != ifa);
987 /* this is only an error if bad on ALL tables */
992 * Do the actual request
994 bzero((caddr_t)&info, sizeof(info));
996 info.rti_flags = flags |
997 (ifa->ifa_flags & ~IFA_RTSELF) | RTF_PINNED;
998 info.rti_info[RTAX_DST] = dst;
999 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&sdl;
1000 info.rti_info[RTAX_NETMASK] = netmask;
1001 NET_EPOCH_ENTER(et);
1002 error = rib_action(fibnum, cmd, &info, &rc);
1003 if (error == 0 && rc.rc_rt != NULL) {
1005 * notify any listening routing agents of the change
1008 /* TODO: interface routes/aliases */
1009 rt_newaddrmsg_fib(cmd, ifa, rc.rc_rt, fibnum);
1016 if (cmd == RTM_DELETE) {
1020 /* we only give an error if it wasn't in any table */
1021 error = ((flags & RTF_HOST) ?
1022 EHOSTUNREACH : ENETUNREACH);
1026 /* return an error if any of them failed */
1034 * Set up a routing table entry, normally
1038 rtinit(struct ifaddr *ifa, int cmd, int flags)
1040 struct sockaddr *dst;
1041 int fib = RT_DEFAULT_FIB;
1043 if (flags & RTF_HOST) {
1044 dst = ifa->ifa_dstaddr;
1046 dst = ifa->ifa_addr;
1049 switch (dst->sa_family) {
1052 /* We do support multiple FIBs. */
1056 return (rtinit1(ifa, cmd, flags, fib));
1060 * Announce interface address arrival/withdraw
1061 * Returns 0 on success.
1064 rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
1067 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1068 ("unexpected cmd %d", cmd));
1069 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1070 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1072 EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd);
1073 return (rtsock_addrmsg(cmd, ifa, fibnum));
1077 * Announce kernel-originated route addition/removal to rtsock based on @rt data.
1079 * @rt: valid rtentry
1080 * @ifp: target route interface
1081 * @fibnum: fib id or RT_ALL_FIBS
1083 * Returns 0 on success.
1086 rt_routemsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int rti_addrs,
1090 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1091 ("unexpected cmd %d", cmd));
1093 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1094 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1096 KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__));
1098 return (rtsock_routemsg(cmd, rt, ifp, 0, fibnum));
1102 * Announce kernel-originated route addition/removal to rtsock based on @rt data.
1104 * @info: addrinfo structure with valid data.
1105 * @fibnum: fib id or RT_ALL_FIBS
1107 * Returns 0 on success.
1110 rt_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum)
1113 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE,
1114 ("unexpected cmd %d", cmd));
1116 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1117 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1119 KASSERT(info->rti_info[RTAX_DST] != NULL, (":%s: RTAX_DST must be supplied", __func__));
1121 return (rtsock_routemsg_info(cmd, info, fibnum));
1125 * This is called to generate messages from the routing socket
1126 * indicating a network interface has had addresses associated with it.
1129 rt_newaddrmsg_fib(int cmd, struct ifaddr *ifa, struct rtentry *rt, int fibnum)
1132 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1133 ("unexpected cmd %u", cmd));
1134 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1135 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1137 if (cmd == RTM_ADD) {
1138 rt_addrmsg(cmd, ifa, fibnum);
1140 rt_routemsg(cmd, rt, ifa->ifa_ifp, 0, fibnum);
1143 rt_routemsg(cmd, rt, ifa->ifa_ifp, 0, fibnum);
1144 rt_addrmsg(cmd, ifa, fibnum);