2 * Copyright (c) 1980, 1986, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)route.c 8.3.1.1 (Berkeley) 2/23/95
32 /************************************************************************
33 * Note: In this file a 'fib' is a "forwarding information base" *
34 * Which is the new name for an in kernel routing (next hop) table. *
35 ***********************************************************************/
38 #include "opt_inet6.h"
39 #include "opt_route.h"
41 #include "opt_mrouting.h"
42 #include "opt_mpath.h"
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/syslog.h>
47 #include <sys/malloc.h>
49 #include <sys/socket.h>
50 #include <sys/sysctl.h>
51 #include <sys/syslog.h>
52 #include <sys/sysproto.h>
54 #include <sys/domain.h>
55 #include <sys/kernel.h>
58 #include <net/if_var.h>
59 #include <net/if_dl.h>
60 #include <net/route.h>
62 #include <net/flowtable.h>
65 #include <net/radix_mpath.h>
68 #include <netinet/in.h>
69 #include <netinet/ip_mroute.h>
73 #define RT_MAXFIBS UINT16_MAX
75 /* Kernel config default option. */
78 #error "ROUTETABLES defined too low"
80 #if ROUTETABLES > RT_MAXFIBS
81 #error "ROUTETABLES defined too big"
83 #define RT_NUMFIBS ROUTETABLES
84 #endif /* ROUTETABLES */
85 /* Initialize to default if not otherwise set. */
90 #if defined(INET) || defined(INET6)
92 extern void sctp_addr_change(struct ifaddr *ifa, int cmd);
97 /* This is read-only.. */
98 u_int rt_numfibs = RT_NUMFIBS;
99 SYSCTL_UINT(_net, OID_AUTO, fibs, CTLFLAG_RDTUN, &rt_numfibs, 0, "");
102 * By default add routes to all fibs for new interfaces.
103 * Once this is set to 0 then only allocate routes on interface
104 * changes for the FIB of the caller when adding a new set of addresses
105 * to an interface. XXX this is a shotgun aproach to a problem that needs
106 * a more fine grained solution.. that will come.
107 * XXX also has the problems getting the FIB from curthread which will not
108 * always work given the fib can be overridden and prefixes can be added
109 * from the network stack context.
111 VNET_DEFINE(u_int, rt_add_addr_allfibs) = 1;
112 SYSCTL_UINT(_net, OID_AUTO, add_addr_allfibs, CTLFLAG_RWTUN | CTLFLAG_VNET,
113 &VNET_NAME(rt_add_addr_allfibs), 0, "");
115 VNET_DEFINE(struct rtstat, rtstat);
116 #define V_rtstat VNET(rtstat)
118 VNET_DEFINE(struct radix_node_head *, rt_tables);
119 #define V_rt_tables VNET(rt_tables)
121 VNET_DEFINE(int, rttrash); /* routes not in table but not freed */
122 #define V_rttrash VNET(rttrash)
126 * Convert a 'struct radix_node *' to a 'struct rtentry *'.
127 * The operation can be done safely (in this code) because a
128 * 'struct rtentry' starts with two 'struct radix_node''s, the first
129 * one representing leaf nodes in the routing tree, which is
130 * what the code in radix.c passes us as a 'struct radix_node'.
132 * But because there are a lot of assumptions in this conversion,
133 * do not cast explicitly, but always use the macro below.
135 #define RNTORT(p) ((struct rtentry *)(p))
137 static VNET_DEFINE(uma_zone_t, rtzone); /* Routing table UMA zone. */
138 #define V_rtzone VNET(rtzone)
140 static int rtrequest1_fib_change(struct radix_node_head *, struct rt_addrinfo *,
141 struct rtentry **, u_int);
142 static void rt_setmetrics(const struct rt_addrinfo *, struct rtentry *);
145 * handler for net.my_fibnum
148 sysctl_my_fibnum(SYSCTL_HANDLER_ARGS)
153 fibnum = curthread->td_proc->p_fibnum;
154 error = sysctl_handle_int(oidp, &fibnum, 0, req);
158 SYSCTL_PROC(_net, OID_AUTO, my_fibnum, CTLTYPE_INT|CTLFLAG_RD,
159 NULL, 0, &sysctl_my_fibnum, "I", "default FIB of caller");
161 static __inline struct radix_node_head **
162 rt_tables_get_rnh_ptr(int table, int fam)
164 struct radix_node_head **rnh;
166 KASSERT(table >= 0 && table < rt_numfibs, ("%s: table out of bounds.",
168 KASSERT(fam >= 0 && fam < (AF_MAX+1), ("%s: fam out of bounds.",
171 /* rnh is [fib=0][af=0]. */
172 rnh = (struct radix_node_head **)V_rt_tables;
173 /* Get the offset to the requested table and fam. */
174 rnh += table * (AF_MAX+1) + fam;
179 struct radix_node_head *
180 rt_tables_get_rnh(int table, int fam)
183 return (*rt_tables_get_rnh_ptr(table, fam));
187 * route initialization must occur before ip6_init2(), which happenas at
194 /* whack the tunable ints into line. */
195 if (rt_numfibs > RT_MAXFIBS)
196 rt_numfibs = RT_MAXFIBS;
200 SYSINIT(route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, 0);
203 rtentry_zinit(void *mem, int size, int how)
205 struct rtentry *rt = mem;
207 rt->rt_pksent = counter_u64_alloc(how);
208 if (rt->rt_pksent == NULL)
217 rtentry_zfini(void *mem, int size)
219 struct rtentry *rt = mem;
222 counter_u64_free(rt->rt_pksent);
226 rtentry_ctor(void *mem, int size, void *arg, int how)
228 struct rtentry *rt = mem;
230 bzero(rt, offsetof(struct rtentry, rt_endzero));
231 counter_u64_zero(rt->rt_pksent);
237 rtentry_dtor(void *mem, int size, void *arg)
239 struct rtentry *rt = mem;
245 vnet_route_init(const void *unused __unused)
248 struct radix_node_head **rnh;
252 V_rt_tables = malloc(rt_numfibs * (AF_MAX+1) *
253 sizeof(struct radix_node_head *), M_RTABLE, M_WAITOK|M_ZERO);
255 V_rtzone = uma_zcreate("rtentry", sizeof(struct rtentry),
256 rtentry_ctor, rtentry_dtor,
257 rtentry_zinit, rtentry_zfini, UMA_ALIGN_PTR, 0);
258 for (dom = domains; dom; dom = dom->dom_next) {
259 if (dom->dom_rtattach == NULL)
262 for (table = 0; table < rt_numfibs; table++) {
263 fam = dom->dom_family;
264 if (table != 0 && fam != AF_INET6 && fam != AF_INET)
268 * XXX MRT rtattach will be also called from
269 * vfs_export.c but the offset will be 0 (only for
270 * AF_INET and AF_INET6 which don't need it anyhow).
272 rnh = rt_tables_get_rnh_ptr(table, fam);
274 panic("%s: rnh NULL", __func__);
275 dom->dom_rtattach((void **)rnh, dom->dom_rtoffset);
279 VNET_SYSINIT(vnet_route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,
284 vnet_route_uninit(const void *unused __unused)
289 struct radix_node_head **rnh;
291 for (dom = domains; dom; dom = dom->dom_next) {
292 if (dom->dom_rtdetach == NULL)
295 for (table = 0; table < rt_numfibs; table++) {
296 fam = dom->dom_family;
298 if (table != 0 && fam != AF_INET6 && fam != AF_INET)
301 rnh = rt_tables_get_rnh_ptr(table, fam);
303 panic("%s: rnh NULL", __func__);
304 dom->dom_rtdetach((void **)rnh, dom->dom_rtoffset);
308 free(V_rt_tables, M_RTABLE);
309 uma_zdestroy(V_rtzone);
311 VNET_SYSUNINIT(vnet_route_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD,
312 vnet_route_uninit, 0);
315 #ifndef _SYS_SYSPROTO_H_
321 sys_setfib(struct thread *td, struct setfib_args *uap)
323 if (uap->fibnum < 0 || uap->fibnum >= rt_numfibs)
325 td->td_proc->p_fibnum = uap->fibnum;
330 * Packet routing routines.
333 rtalloc(struct route *ro)
336 rtalloc_ign_fib(ro, 0UL, RT_DEFAULT_FIB);
340 rtalloc_fib(struct route *ro, u_int fibnum)
342 rtalloc_ign_fib(ro, 0UL, fibnum);
346 rtalloc_ign(struct route *ro, u_long ignore)
350 if ((rt = ro->ro_rt) != NULL) {
351 if (rt->rt_ifp != NULL && rt->rt_flags & RTF_UP)
356 ro->ro_rt = rtalloc1_fib(&ro->ro_dst, 1, ignore, RT_DEFAULT_FIB);
358 RT_UNLOCK(ro->ro_rt);
362 rtalloc_ign_fib(struct route *ro, u_long ignore, u_int fibnum)
366 if ((rt = ro->ro_rt) != NULL) {
367 if (rt->rt_ifp != NULL && rt->rt_flags & RTF_UP)
372 ro->ro_rt = rtalloc1_fib(&ro->ro_dst, 1, ignore, fibnum);
374 RT_UNLOCK(ro->ro_rt);
378 * Look up the route that matches the address given
379 * Or, at least try.. Create a cloned route if needed.
381 * The returned route, if any, is locked.
384 rtalloc1(struct sockaddr *dst, int report, u_long ignflags)
387 return (rtalloc1_fib(dst, report, ignflags, RT_DEFAULT_FIB));
391 rtalloc1_fib(struct sockaddr *dst, int report, u_long ignflags,
394 struct radix_node_head *rnh;
395 struct radix_node *rn;
396 struct rtentry *newrt;
397 struct rt_addrinfo info;
398 int err = 0, msgtype = RTM_MISS;
401 KASSERT((fibnum < rt_numfibs), ("rtalloc1_fib: bad fibnum"));
402 rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
408 * Look up the address in the table for that Address Family
410 needlock = !(ignflags & RTF_RNH_LOCKED);
412 RADIX_NODE_HEAD_RLOCK(rnh);
415 RADIX_NODE_HEAD_LOCK_ASSERT(rnh);
417 rn = rnh->rnh_matchaddr(dst, rnh);
418 if (rn && ((rn->rn_flags & RNF_ROOT) == 0)) {
423 RADIX_NODE_HEAD_RUNLOCK(rnh);
427 RADIX_NODE_HEAD_RUNLOCK(rnh);
430 * Either we hit the root or couldn't find any match,
431 * Which basically means
432 * "caint get there frm here"
435 V_rtstat.rts_unreach++;
439 * If required, report the failure to the supervising
441 * For a delete, this is not an error. (report == 0)
443 bzero(&info, sizeof(info));
444 info.rti_info[RTAX_DST] = dst;
445 rt_missmsg_fib(msgtype, &info, 0, err, fibnum);
449 RT_LOCK_ASSERT(newrt);
454 * Remove a reference count from an rtentry.
455 * If the count gets low enough, take it out of the routing table
458 rtfree(struct rtentry *rt)
460 struct radix_node_head *rnh;
462 KASSERT(rt != NULL,("%s: NULL rt", __func__));
463 rnh = rt_tables_get_rnh(rt->rt_fibnum, rt_key(rt)->sa_family);
464 KASSERT(rnh != NULL,("%s: NULL rnh", __func__));
469 * The callers should use RTFREE_LOCKED() or RTFREE(), so
470 * we should come here exactly with the last reference.
473 if (rt->rt_refcnt > 0) {
474 log(LOG_DEBUG, "%s: %p has %d refs\n", __func__, rt, rt->rt_refcnt);
479 * On last reference give the "close method" a chance
480 * to cleanup private state. This also permits (for
481 * IPv4 and IPv6) a chance to decide if the routing table
482 * entry should be purged immediately or at a later time.
483 * When an immediate purge is to happen the close routine
484 * typically calls rtexpunge which clears the RTF_UP flag
485 * on the entry so that the code below reclaims the storage.
487 if (rt->rt_refcnt == 0 && rnh->rnh_close)
488 rnh->rnh_close((struct radix_node *)rt, rnh);
491 * If we are no longer "up" (and ref == 0)
492 * then we can free the resources associated
495 if ((rt->rt_flags & RTF_UP) == 0) {
496 if (rt->rt_nodes->rn_flags & (RNF_ACTIVE | RNF_ROOT))
499 * the rtentry must have been removed from the routing table
500 * so it is represented in rttrash.. remove that now.
504 if (rt->rt_refcnt < 0) {
505 printf("rtfree: %p not freed (neg refs)\n", rt);
510 * release references on items we hold them on..
511 * e.g other routes and ifaddrs.
514 ifa_free(rt->rt_ifa);
516 * The key is separatly alloc'd so free it (see rt_setgate()).
517 * This also frees the gateway, as they are always malloc'd
523 * and the rtentry itself of course
525 uma_zfree(V_rtzone, rt);
534 * Force a routing table entry to the specified
535 * destination to go through the given gateway.
536 * Normally called as a result of a routing redirect
537 * message from the network layer.
540 rtredirect(struct sockaddr *dst,
541 struct sockaddr *gateway,
542 struct sockaddr *netmask,
544 struct sockaddr *src)
547 rtredirect_fib(dst, gateway, netmask, flags, src, RT_DEFAULT_FIB);
551 rtredirect_fib(struct sockaddr *dst,
552 struct sockaddr *gateway,
553 struct sockaddr *netmask,
555 struct sockaddr *src,
558 struct rtentry *rt, *rt0 = NULL;
561 struct rt_addrinfo info;
563 struct radix_node_head *rnh;
566 rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
568 error = EAFNOSUPPORT;
572 /* verify the gateway is directly reachable */
573 if ((ifa = ifa_ifwithnet(gateway, 0, fibnum)) == NULL) {
577 rt = rtalloc1_fib(dst, 0, 0UL, fibnum); /* NB: rt is locked */
579 * If the redirect isn't from our current router for this dst,
580 * it's either old or wrong. If it redirects us to ourselves,
581 * we have a routing loop, perhaps as a result of an interface
582 * going down recently.
584 if (!(flags & RTF_DONE) && rt &&
585 (!sa_equal(src, rt->rt_gateway) || rt->rt_ifa != ifa))
587 else if (ifa_ifwithaddr_check(gateway))
588 error = EHOSTUNREACH;
592 * Create a new entry if we just got back a wildcard entry
593 * or the lookup failed. This is necessary for hosts
594 * which use routing redirects generated by smart gateways
595 * to dynamically build the routing tables.
597 if (rt == NULL || (rt_mask(rt) && rt_mask(rt)->sa_len < 2))
600 * Don't listen to the redirect if it's
601 * for a route to an interface.
603 if (rt->rt_flags & RTF_GATEWAY) {
604 if (((rt->rt_flags & RTF_HOST) == 0) && (flags & RTF_HOST)) {
606 * Changing from route to net => route to host.
607 * Create new route, rather than smashing route to net.
613 flags |= RTF_GATEWAY | RTF_DYNAMIC;
614 bzero((caddr_t)&info, sizeof(info));
615 info.rti_info[RTAX_DST] = dst;
616 info.rti_info[RTAX_GATEWAY] = gateway;
617 info.rti_info[RTAX_NETMASK] = netmask;
619 info.rti_flags = flags;
621 RT_UNLOCK(rt0); /* drop lock to avoid LOR with RNH */
622 error = rtrequest1_fib(RTM_ADD, &info, &rt, fibnum);
626 EVENTHANDLER_INVOKE(route_redirect_event, rt0, rt, dst);
627 flags = rt->rt_flags;
632 stat = &V_rtstat.rts_dynamic;
634 struct rtentry *gwrt;
637 * Smash the current notion of the gateway to
638 * this destination. Should check about netmask!!!
640 rt->rt_flags |= RTF_MODIFIED;
641 flags |= RTF_MODIFIED;
642 stat = &V_rtstat.rts_newgateway;
644 * add the key and gateway (in one malloc'd chunk).
647 RADIX_NODE_HEAD_LOCK(rnh);
649 rt_setgate(rt, rt_key(rt), gateway);
650 gwrt = rtalloc1(gateway, 1, RTF_RNH_LOCKED);
651 RADIX_NODE_HEAD_UNLOCK(rnh);
652 EVENTHANDLER_INVOKE(route_redirect_event, rt, gwrt, dst);
656 error = EHOSTUNREACH;
662 V_rtstat.rts_badredirect++;
663 else if (stat != NULL)
665 bzero((caddr_t)&info, sizeof(info));
666 info.rti_info[RTAX_DST] = dst;
667 info.rti_info[RTAX_GATEWAY] = gateway;
668 info.rti_info[RTAX_NETMASK] = netmask;
669 info.rti_info[RTAX_AUTHOR] = src;
670 rt_missmsg_fib(RTM_REDIRECT, &info, flags, error, fibnum);
676 rtioctl(u_long req, caddr_t data)
679 return (rtioctl_fib(req, data, RT_DEFAULT_FIB));
683 * Routing table ioctl interface.
686 rtioctl_fib(u_long req, caddr_t data, u_int fibnum)
690 * If more ioctl commands are added here, make sure the proper
691 * super-user checks are being performed because it is possible for
692 * prison-root to make it this far if raw sockets have been enabled
696 /* Multicast goop, grrr... */
697 return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP;
704 ifa_ifwithroute(int flags, struct sockaddr *dst, struct sockaddr *gateway,
710 if ((flags & RTF_GATEWAY) == 0) {
712 * If we are adding a route to an interface,
713 * and the interface is a pt to pt link
714 * we should search for the destination
715 * as our clue to the interface. Otherwise
716 * we can use the local address.
719 if (flags & RTF_HOST)
720 ifa = ifa_ifwithdstaddr(dst, fibnum);
722 ifa = ifa_ifwithaddr(gateway);
725 * If we are adding a route to a remote net
726 * or host, the gateway may still be on the
727 * other end of a pt to pt link.
729 ifa = ifa_ifwithdstaddr(gateway, fibnum);
732 ifa = ifa_ifwithnet(gateway, 0, fibnum);
734 struct rtentry *rt = rtalloc1_fib(gateway, 0, RTF_RNH_LOCKED, fibnum);
738 * dismiss a gateway that is reachable only
739 * through the default router
741 switch (gateway->sa_family) {
743 if (satosin(rt_key(rt))->sin_addr.s_addr == INADDR_ANY)
747 if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(rt_key(rt))->sin6_addr))
753 if (!not_found && rt->rt_ifa != NULL) {
759 if (not_found || ifa == NULL)
762 if (ifa->ifa_addr->sa_family != dst->sa_family) {
763 struct ifaddr *oifa = ifa;
764 ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp);
774 * Do appropriate manipulations of a routing tree given
775 * all the bits of info needed
779 struct sockaddr *dst,
780 struct sockaddr *gateway,
781 struct sockaddr *netmask,
783 struct rtentry **ret_nrt)
786 return (rtrequest_fib(req, dst, gateway, netmask, flags, ret_nrt,
791 rtrequest_fib(int req,
792 struct sockaddr *dst,
793 struct sockaddr *gateway,
794 struct sockaddr *netmask,
796 struct rtentry **ret_nrt,
799 struct rt_addrinfo info;
801 if (dst->sa_len == 0)
804 bzero((caddr_t)&info, sizeof(info));
805 info.rti_flags = flags;
806 info.rti_info[RTAX_DST] = dst;
807 info.rti_info[RTAX_GATEWAY] = gateway;
808 info.rti_info[RTAX_NETMASK] = netmask;
809 return rtrequest1_fib(req, &info, ret_nrt, fibnum);
813 * These (questionable) definitions of apparent local variables apply
814 * to the next two functions. XXXXXX!!!
816 #define dst info->rti_info[RTAX_DST]
817 #define gateway info->rti_info[RTAX_GATEWAY]
818 #define netmask info->rti_info[RTAX_NETMASK]
819 #define ifaaddr info->rti_info[RTAX_IFA]
820 #define ifpaddr info->rti_info[RTAX_IFP]
821 #define flags info->rti_flags
824 rt_getifa(struct rt_addrinfo *info)
827 return (rt_getifa_fib(info, RT_DEFAULT_FIB));
831 * Look up rt_addrinfo for a specific fib. Note that if rti_ifa is defined,
832 * it will be referenced so the caller must free it.
835 rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum)
841 * ifp may be specified by sockaddr_dl
842 * when protocol address is ambiguous.
844 if (info->rti_ifp == NULL && ifpaddr != NULL &&
845 ifpaddr->sa_family == AF_LINK &&
846 (ifa = ifa_ifwithnet(ifpaddr, 0, fibnum)) != NULL) {
847 info->rti_ifp = ifa->ifa_ifp;
850 if (info->rti_ifa == NULL && ifaaddr != NULL)
851 info->rti_ifa = ifa_ifwithaddr(ifaaddr);
852 if (info->rti_ifa == NULL) {
855 sa = ifaaddr != NULL ? ifaaddr :
856 (gateway != NULL ? gateway : dst);
857 if (sa != NULL && info->rti_ifp != NULL)
858 info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp);
859 else if (dst != NULL && gateway != NULL)
860 info->rti_ifa = ifa_ifwithroute(flags, dst, gateway,
863 info->rti_ifa = ifa_ifwithroute(flags, sa, sa,
866 if ((ifa = info->rti_ifa) != NULL) {
867 if (info->rti_ifp == NULL)
868 info->rti_ifp = ifa->ifa_ifp;
875 * Expunges references to a route that's about to be reclaimed.
876 * The route must be locked.
879 rt_expunge(struct radix_node_head *rnh, struct rtentry *rt)
881 #if !defined(RADIX_MPATH)
882 struct radix_node *rn;
884 struct rt_addrinfo info;
892 RADIX_NODE_HEAD_LOCK_ASSERT(rnh);
896 bzero(&info, sizeof(info));
897 info.rti_ifp = rt->rt_ifp;
898 info.rti_flags = RTF_RNH_LOCKED;
899 info.rti_info[RTAX_DST] = rt_key(rt);
900 info.rti_info[RTAX_GATEWAY] = rt->rt_ifa->ifa_addr;
903 error = rtrequest1_fib(RTM_DELETE, &info, &rt0, fib);
905 if (error == 0 && rt0 != NULL) {
908 } else if (error != 0) {
914 * Remove the item from the tree; it should be there,
915 * but when callers invoke us blindly it may not (sigh).
917 rn = rnh->rnh_deladdr(rt_key(rt), rt_mask(rt), rnh);
922 KASSERT((rn->rn_flags & (RNF_ACTIVE | RNF_ROOT)) == 0,
923 ("unexpected flags 0x%x", rn->rn_flags));
924 KASSERT(rt == RNTORT(rn),
925 ("lookup mismatch, rt %p rn %p", rt, rn));
926 #endif /* RADIX_MPATH */
928 rt->rt_flags &= ~RTF_UP;
931 * Give the protocol a chance to keep things in sync.
933 if ((ifa = rt->rt_ifa) && ifa->ifa_rtrequest) {
934 struct rt_addrinfo info;
936 bzero((caddr_t)&info, sizeof(info));
937 info.rti_flags = rt->rt_flags;
938 info.rti_info[RTAX_DST] = rt_key(rt);
939 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
940 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
941 ifa->ifa_rtrequest(RTM_DELETE, rt, &info);
945 * one more rtentry floating around that is not
946 * linked to the routing table.
949 #if !defined(RADIX_MPATH)
956 int p_sockaddr(char *buf, int buflen, struct sockaddr *s);
957 int rt_print(char *buf, int buflen, struct rtentry *rt);
960 p_sockaddr(char *buf, int buflen, struct sockaddr *s)
964 switch (s->sa_family) {
966 paddr = &((struct sockaddr_in *)s)->sin_addr;
969 paddr = &((struct sockaddr_in6 *)s)->sin6_addr;
976 if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL)
979 return (strlen(buf));
983 rt_print(char *buf, int buflen, struct rtentry *rt)
985 struct sockaddr *addr, *mask;
991 i = p_sockaddr(buf, buflen, addr);
992 if (!(rt->rt_flags & RTF_HOST)) {
994 i += p_sockaddr(buf + i, buflen - i, mask);
997 if (rt->rt_flags & RTF_GATEWAY) {
999 i += p_sockaddr(buf + i, buflen - i, rt->rt_gateway);
1008 rn_mpath_update(int req, struct rt_addrinfo *info,
1009 struct radix_node_head *rnh, struct rtentry **ret_nrt)
1012 * if we got multipath routes, we require users to specify
1013 * a matching RTAX_GATEWAY.
1015 struct rtentry *rt, *rto = NULL;
1016 struct radix_node *rn;
1019 rn = rnh->rnh_lookup(dst, netmask, rnh);
1022 rto = rt = RNTORT(rn);
1024 rt = rt_mpath_matchgate(rt, gateway);
1028 * this is the first entry in the chain
1031 rn = rn_mpath_next((struct radix_node *)rt);
1033 * there is another entry, now it's active
1038 rto->rt_flags |= RTF_UP;
1040 } else if (rt->rt_flags & RTF_GATEWAY) {
1042 * For gateway routes, we need to
1043 * make sure that we we are deleting
1044 * the correct gateway.
1045 * rt_mpath_matchgate() does not
1046 * check the case when there is only
1047 * one route in the chain.
1050 (rt->rt_gateway->sa_len != gateway->sa_len ||
1051 memcmp(rt->rt_gateway, gateway, gateway->sa_len)))
1055 * remove from tree before returning it
1058 rn = rnh->rnh_deladdr(dst, netmask, rnh);
1059 KASSERT(rt == RNTORT(rn), ("radix node disappeared"));
1065 * use the normal delete code to remove
1068 if (req != RTM_DELETE)
1076 * if the entry is 2nd and on up
1078 if ((req == RTM_DELETE) && !rt_mpath_deldup(rto, rt))
1079 panic ("rtrequest1: rt_mpath_deldup");
1083 if (req == RTM_DELETE) {
1084 rt->rt_flags &= ~RTF_UP;
1086 * One more rtentry floating around that is not
1087 * linked to the routing table. rttrash will be decremented
1088 * when RTFREE(rt) is eventually called.
1094 if (req != RTM_DELETE)
1095 panic("unrecognized request %d", req);
1099 * If the caller wants it, then it can have it,
1100 * but it's up to it to free the rtentry as we won't be
1114 rtrequest1_fib(int req, struct rt_addrinfo *info, struct rtentry **ret_nrt,
1117 int error = 0, needlock = 0;
1120 struct rtentry *rt0;
1122 struct radix_node *rn;
1123 struct radix_node_head *rnh;
1125 struct sockaddr *ndst;
1126 struct sockaddr_storage mdst;
1127 #define senderr(x) { error = x ; goto bad; }
1129 KASSERT((fibnum < rt_numfibs), ("rtrequest1_fib: bad fibnum"));
1130 switch (dst->sa_family) {
1133 /* We support multiple FIBs. */
1136 fibnum = RT_DEFAULT_FIB;
1141 * Find the correct routing tree to use for this Address Family
1143 rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
1145 return (EAFNOSUPPORT);
1146 needlock = ((flags & RTF_RNH_LOCKED) == 0);
1147 flags &= ~RTF_RNH_LOCKED;
1149 RADIX_NODE_HEAD_LOCK(rnh);
1151 RADIX_NODE_HEAD_LOCK_ASSERT(rnh);
1153 * If we are adding a host route then we don't want to put
1154 * a netmask in the tree, nor do we want to clone it.
1156 if (flags & RTF_HOST)
1162 rt_maskedcopy(dst, (struct sockaddr *)&mdst, netmask);
1163 dst = (struct sockaddr *)&mdst;
1166 if (rn_mpath_capable(rnh)) {
1167 error = rn_mpath_update(req, info, rnh, ret_nrt);
1169 * "bad" holds true for the success case
1172 if (error != ENOENT)
1177 if ((flags & RTF_PINNED) == 0) {
1178 /* Check if target route can be deleted */
1179 rt = (struct rtentry *)rnh->rnh_lookup(dst,
1181 if ((rt != NULL) && (rt->rt_flags & RTF_PINNED))
1182 senderr(EADDRINUSE);
1186 * Remove the item from the tree and return it.
1187 * Complain if it is not there and do no more processing.
1189 rn = rnh->rnh_deladdr(dst, netmask, rnh);
1192 if (rn->rn_flags & (RNF_ACTIVE | RNF_ROOT))
1193 panic ("rtrequest delete");
1197 rt->rt_flags &= ~RTF_UP;
1200 * give the protocol a chance to keep things in sync.
1202 if ((ifa = rt->rt_ifa) && ifa->ifa_rtrequest)
1203 ifa->ifa_rtrequest(RTM_DELETE, rt, info);
1206 * One more rtentry floating around that is not
1207 * linked to the routing table. rttrash will be decremented
1208 * when RTFREE(rt) is eventually called.
1213 * If the caller wants it, then it can have it,
1214 * but it's up to it to free the rtentry as we won't be
1225 * resolve was only used for route cloning
1230 if ((flags & RTF_GATEWAY) && !gateway)
1232 if (dst && gateway && (dst->sa_family != gateway->sa_family) &&
1233 (gateway->sa_family != AF_UNSPEC) && (gateway->sa_family != AF_LINK))
1236 if (info->rti_ifa == NULL) {
1237 error = rt_getifa_fib(info, fibnum);
1241 ifa_ref(info->rti_ifa);
1242 ifa = info->rti_ifa;
1243 rt = uma_zalloc(V_rtzone, M_NOWAIT);
1248 rt->rt_flags = RTF_UP | flags;
1249 rt->rt_fibnum = fibnum;
1251 * Add the gateway. Possibly re-malloc-ing the storage for it.
1254 if ((error = rt_setgate(rt, dst, gateway)) != 0) {
1256 uma_zfree(V_rtzone, rt);
1261 * point to the (possibly newly malloc'd) dest address.
1263 ndst = (struct sockaddr *)rt_key(rt);
1266 * make sure it contains the value we want (masked if needed).
1269 rt_maskedcopy(dst, ndst, netmask);
1271 bcopy(dst, ndst, dst->sa_len);
1274 * We use the ifa reference returned by rt_getifa_fib().
1275 * This moved from below so that rnh->rnh_addaddr() can
1276 * examine the ifa and ifa->ifa_ifp if it so desires.
1279 rt->rt_ifp = ifa->ifa_ifp;
1283 /* do not permit exactly the same dst/mask/gw pair */
1284 if (rn_mpath_capable(rnh) &&
1285 rt_mpath_conflict(rnh, rt, netmask)) {
1286 ifa_free(rt->rt_ifa);
1288 uma_zfree(V_rtzone, rt);
1295 /* "flow-table" only supports IPv6 and IPv4 at the moment. */
1296 switch (dst->sa_family) {
1303 #if defined(INET6) || defined(INET)
1304 rn = rnh->rnh_matchaddr(dst, rnh);
1305 if (rn && ((rn->rn_flags & RNF_ROOT) == 0)) {
1306 struct sockaddr *mask;
1311 * compare mask to see if the new route is
1312 * more specific than the existing one
1319 * A host route is already present, so
1320 * leave the flow-table entries as is.
1322 if (rt0->rt_flags & RTF_HOST) {
1325 } else if (!(flags & RTF_HOST) && netmask) {
1326 mask = rt_mask(rt0);
1329 n = (u_char *)netmask;
1336 if (len == 0 || (*n < *m)) {
1342 #endif/* INET6 || INET */
1344 #endif /* FLOWTABLE */
1346 /* XXX mtu manipulation will be done in rnh_addaddr -- itojun */
1347 rn = rnh->rnh_addaddr(ndst, netmask, rnh, rt->rt_nodes);
1349 * If it still failed to go into the tree,
1350 * then un-make it (this should be a function)
1353 ifa_free(rt->rt_ifa);
1355 uma_zfree(V_rtzone, rt);
1363 else if (rt0 != NULL) {
1364 flowtable_route_flush(dst->sa_family, rt0);
1370 * If this protocol has something to add to this then
1371 * allow it to do that as well.
1373 if (ifa->ifa_rtrequest)
1374 ifa->ifa_rtrequest(req, rt, info);
1376 rt_setmetrics(info, rt);
1379 * actually return a resultant rtentry and
1380 * give the caller a single reference.
1389 error = rtrequest1_fib_change(rnh, info, ret_nrt, fibnum);
1396 RADIX_NODE_HEAD_UNLOCK(rnh);
1409 rtrequest1_fib_change(struct radix_node_head *rnh, struct rt_addrinfo *info,
1410 struct rtentry **ret_nrt, u_int fibnum)
1412 struct rtentry *rt = NULL;
1416 rt = (struct rtentry *)rnh->rnh_lookup(info->rti_info[RTAX_DST],
1417 info->rti_info[RTAX_NETMASK], rnh);
1424 * If we got multipath routes,
1425 * we require users to specify a matching RTAX_GATEWAY.
1427 if (rn_mpath_capable(rnh)) {
1428 rt = rt_mpath_matchgate(rt, info->rti_info[RTAX_GATEWAY]);
1437 * New gateway could require new ifaddr, ifp;
1438 * flags may also be different; ifp may be specified
1439 * by ll sockaddr when protocol address is ambiguous
1441 if (((rt->rt_flags & RTF_GATEWAY) &&
1442 info->rti_info[RTAX_GATEWAY] != NULL) ||
1443 info->rti_info[RTAX_IFP] != NULL ||
1444 (info->rti_info[RTAX_IFA] != NULL &&
1445 !sa_equal(info->rti_info[RTAX_IFA], rt->rt_ifa->ifa_addr))) {
1447 error = rt_getifa_fib(info, fibnum);
1448 if (info->rti_ifa != NULL)
1455 /* Check if outgoing interface has changed */
1456 if (info->rti_ifa != NULL && info->rti_ifa != rt->rt_ifa &&
1457 rt->rt_ifa != NULL && rt->rt_ifa->ifa_rtrequest != NULL) {
1458 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, info);
1459 ifa_free(rt->rt_ifa);
1461 /* Update gateway address */
1462 if (info->rti_info[RTAX_GATEWAY] != NULL) {
1463 error = rt_setgate(rt, rt_key(rt), info->rti_info[RTAX_GATEWAY]);
1467 rt->rt_flags &= ~RTF_GATEWAY;
1468 rt->rt_flags |= (RTF_GATEWAY & info->rti_flags);
1471 if (info->rti_ifa != NULL && info->rti_ifa != rt->rt_ifa) {
1472 ifa_ref(info->rti_ifa);
1473 rt->rt_ifa = info->rti_ifa;
1474 rt->rt_ifp = info->rti_ifp;
1476 /* Allow some flags to be toggled on change. */
1477 rt->rt_flags &= ~RTF_FMASK;
1478 rt->rt_flags |= info->rti_flags & RTF_FMASK;
1480 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest != NULL)
1481 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info);
1483 rt_setmetrics(info, rt);
1492 ifa_free(info->rti_ifa);
1497 rt_setmetrics(const struct rt_addrinfo *info, struct rtentry *rt)
1500 if (info->rti_mflags & RTV_MTU)
1501 rt->rt_mtu = info->rti_rmx->rmx_mtu;
1502 if (info->rti_mflags & RTV_WEIGHT)
1503 rt->rt_weight = info->rti_rmx->rmx_weight;
1504 /* Kernel -> userland timebase conversion. */
1505 if (info->rti_mflags & RTV_EXPIRE)
1506 rt->rt_expire = info->rti_rmx->rmx_expire ?
1507 info->rti_rmx->rmx_expire - time_second + time_uptime : 0;
1511 rt_setgate(struct rtentry *rt, struct sockaddr *dst, struct sockaddr *gate)
1513 /* XXX dst may be overwritten, can we move this to below */
1514 int dlen = SA_SIZE(dst), glen = SA_SIZE(gate);
1516 struct radix_node_head *rnh;
1518 rnh = rt_tables_get_rnh(rt->rt_fibnum, dst->sa_family);
1522 RADIX_NODE_HEAD_LOCK_ASSERT(rnh);
1525 * Prepare to store the gateway in rt->rt_gateway.
1526 * Both dst and gateway are stored one after the other in the same
1527 * malloc'd chunk. If we have room, we can reuse the old buffer,
1528 * rt_gateway already points to the right place.
1529 * Otherwise, malloc a new block and update the 'dst' address.
1531 if (rt->rt_gateway == NULL || glen > SA_SIZE(rt->rt_gateway)) {
1534 R_Malloc(new, caddr_t, dlen + glen);
1538 * XXX note, we copy from *dst and not *rt_key(rt) because
1539 * rt_setgate() can be called to initialize a newly
1540 * allocated route entry, in which case rt_key(rt) == NULL
1541 * (and also rt->rt_gateway == NULL).
1542 * Free()/free() handle a NULL argument just fine.
1544 bcopy(dst, new, dlen);
1545 Free(rt_key(rt)); /* free old block, if any */
1546 rt_key(rt) = (struct sockaddr *)new;
1547 rt->rt_gateway = (struct sockaddr *)(new + dlen);
1551 * Copy the new gateway value into the memory chunk.
1553 bcopy(gate, rt->rt_gateway, glen);
1559 rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask)
1561 u_char *cp1 = (u_char *)src;
1562 u_char *cp2 = (u_char *)dst;
1563 u_char *cp3 = (u_char *)netmask;
1564 u_char *cplim = cp2 + *cp3;
1565 u_char *cplim2 = cp2 + *cp1;
1567 *cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */
1572 *cp2++ = *cp1++ & *cp3++;
1574 bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2));
1578 * Set up a routing table entry, normally
1581 #define _SOCKADDR_TMPSIZE 128 /* Not too big.. kernel stack size is limited */
1583 rtinit1(struct ifaddr *ifa, int cmd, int flags, int fibnum)
1585 struct sockaddr *dst;
1586 struct sockaddr *netmask;
1587 struct rtentry *rt = NULL;
1588 struct rt_addrinfo info;
1590 int startfib, endfib;
1591 char tempbuf[_SOCKADDR_TMPSIZE];
1594 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
1595 struct radix_node_head *rnh;
1597 if (flags & RTF_HOST) {
1598 dst = ifa->ifa_dstaddr;
1601 dst = ifa->ifa_addr;
1602 netmask = ifa->ifa_netmask;
1604 if (dst->sa_len == 0)
1606 switch (dst->sa_family) {
1609 /* We support multiple FIBs. */
1612 fibnum = RT_DEFAULT_FIB;
1615 if (fibnum == RT_ALL_FIBS) {
1616 if (V_rt_add_addr_allfibs == 0 && cmd == (int)RTM_ADD)
1617 startfib = endfib = ifa->ifa_ifp->if_fib;
1620 endfib = rt_numfibs - 1;
1623 KASSERT((fibnum < rt_numfibs), ("rtinit1: bad fibnum"));
1629 * If it's a delete, check that if it exists,
1630 * it's on the correct interface or we might scrub
1631 * a route to another ifa which would
1632 * be confusing at best and possibly worse.
1634 if (cmd == RTM_DELETE) {
1636 * It's a delete, so it should already exist..
1637 * If it's a net, mask off the host bits
1638 * (Assuming we have a mask)
1639 * XXX this is kinda inet specific..
1641 if (netmask != NULL) {
1642 rt_maskedcopy(dst, (struct sockaddr *)tempbuf, netmask);
1643 dst = (struct sockaddr *)tempbuf;
1647 * Now go through all the requested tables (fibs) and do the
1648 * requested action. Realistically, this will either be fib 0
1649 * for protocols that don't do multiple tables or all the
1650 * tables for those that do.
1652 for ( fibnum = startfib; fibnum <= endfib; fibnum++) {
1653 if (cmd == RTM_DELETE) {
1654 struct radix_node *rn;
1656 * Look up an rtentry that is in the routing tree and
1657 * contains the correct info.
1659 rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
1661 /* this table doesn't exist but others might */
1663 RADIX_NODE_HEAD_RLOCK(rnh);
1664 rn = rnh->rnh_lookup(dst, netmask, rnh);
1666 if (rn_mpath_capable(rnh)) {
1673 * for interface route the
1674 * rt->rt_gateway is sockaddr_intf
1675 * for cloning ARP entries, so
1676 * rt_mpath_matchgate must use the
1679 rt = rt_mpath_matchgate(rt,
1686 error = (rn == NULL ||
1687 (rn->rn_flags & RNF_ROOT) ||
1688 RNTORT(rn)->rt_ifa != ifa);
1689 RADIX_NODE_HEAD_RUNLOCK(rnh);
1691 /* this is only an error if bad on ALL tables */
1696 * Do the actual request
1698 bzero((caddr_t)&info, sizeof(info));
1700 info.rti_flags = flags |
1701 (ifa->ifa_flags & ~IFA_RTSELF) | RTF_PINNED;
1702 info.rti_info[RTAX_DST] = dst;
1704 * doing this for compatibility reasons
1707 info.rti_info[RTAX_GATEWAY] =
1708 (struct sockaddr *)&null_sdl;
1710 info.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
1711 info.rti_info[RTAX_NETMASK] = netmask;
1712 error = rtrequest1_fib(cmd, &info, &rt, fibnum);
1714 if ((error == EEXIST) && (cmd == RTM_ADD)) {
1716 * Interface route addition failed.
1717 * Atomically delete current prefix generating
1718 * RTM_DELETE message, and retry adding
1721 rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
1722 RADIX_NODE_HEAD_LOCK(rnh);
1724 /* Delete old prefix */
1725 info.rti_ifa = NULL;
1726 info.rti_flags = RTF_RNH_LOCKED;
1728 error = rtrequest1_fib(RTM_DELETE, &info, NULL, fibnum);
1731 info.rti_flags = flags | RTF_RNH_LOCKED |
1732 (ifa->ifa_flags & ~IFA_RTSELF) | RTF_PINNED;
1733 error = rtrequest1_fib(cmd, &info, &rt, fibnum);
1736 RADIX_NODE_HEAD_UNLOCK(rnh);
1740 if (error == 0 && rt != NULL) {
1742 * notify any listening routing agents of the change
1747 * in case address alias finds the first address
1748 * e.g. ifconfig bge0 192.0.2.246/24
1749 * e.g. ifconfig bge0 192.0.2.247/24
1750 * the address set in the route is 192.0.2.246
1751 * so we need to replace it with 192.0.2.247
1753 if (memcmp(rt->rt_ifa->ifa_addr,
1754 ifa->ifa_addr, ifa->ifa_addr->sa_len)) {
1755 ifa_free(rt->rt_ifa);
1757 rt->rt_ifp = ifa->ifa_ifp;
1762 * doing this for compatibility reasons
1764 if (cmd == RTM_ADD) {
1765 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
1766 rt->rt_ifp->if_type;
1767 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
1768 rt->rt_ifp->if_index;
1772 rt_newaddrmsg_fib(cmd, ifa, error, rt, fibnum);
1775 if (cmd == RTM_DELETE) {
1777 * If we are deleting, and we found an entry,
1778 * then it's been removed from the tree..
1779 * now throw it away.
1783 if (cmd == RTM_ADD) {
1785 * We just wanted to add it..
1786 * we don't actually need a reference.
1797 if (cmd == RTM_DELETE) {
1801 /* we only give an error if it wasn't in any table */
1802 error = ((flags & RTF_HOST) ?
1803 EHOSTUNREACH : ENETUNREACH);
1807 /* return an error if any of them failed */
1815 * Set up a routing table entry, normally
1819 rtinit(struct ifaddr *ifa, int cmd, int flags)
1821 struct sockaddr *dst;
1822 int fib = RT_DEFAULT_FIB;
1824 if (flags & RTF_HOST) {
1825 dst = ifa->ifa_dstaddr;
1827 dst = ifa->ifa_addr;
1830 switch (dst->sa_family) {
1833 /* We do support multiple FIBs. */
1837 return (rtinit1(ifa, cmd, flags, fib));
1841 * Announce interface address arrival/withdraw
1842 * Returns 0 on success.
1845 rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
1848 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1849 ("unexpected cmd %d", cmd));
1851 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1852 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1854 #if defined(INET) || defined(INET6)
1857 * notify the SCTP stack
1858 * this will only get called when an address is added/deleted
1859 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1861 sctp_addr_change(ifa, cmd);
1864 return (rtsock_addrmsg(cmd, ifa, fibnum));
1868 * Announce route addition/removal.
1869 * Users of this function MUST validate input data BEFORE calling.
1870 * However we have to be able to handle invalid data:
1871 * if some userland app sends us "invalid" route message (invalid mask,
1872 * no dst, wrong address families, etc...) we need to pass it back
1873 * to app (and any other rtsock consumers) with rtm_errno field set to
1875 * Returns 0 on success.
1878 rt_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt,
1882 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1883 ("unexpected cmd %d", cmd));
1885 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1886 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1888 KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__));
1890 return (rtsock_routemsg(cmd, ifp, error, rt, fibnum));
1894 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1897 rt_newaddrmsg_fib(cmd, ifa, error, rt, RT_ALL_FIBS);
1901 * This is called to generate messages from the routing socket
1902 * indicating a network interface has had addresses associated with it.
1905 rt_newaddrmsg_fib(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt,
1909 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1910 ("unexpected cmd %u", cmd));
1911 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
1912 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
1914 if (cmd == RTM_ADD) {
1915 rt_addrmsg(cmd, ifa, fibnum);
1917 rt_routemsg(cmd, ifa->ifa_ifp, error, rt, fibnum);
1920 rt_routemsg(cmd, ifa->ifa_ifp, error, rt, fibnum);
1921 rt_addrmsg(cmd, ifa, fibnum);