2 * Copyright (c) 2004, 2005 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of The DragonFly Project nor the names of its
16 * contributors may be used to endorse or promote products derived
17 * from this software without specific, prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Copyright (c) 2004, 2005 Jeffrey M. Hsu. All rights reserved.
36 * License terms: all terms for the DragonFly license above plus the following:
38 * 4. All advertising materials mentioning features or use of this software
39 * must display the following acknowledgement:
41 * This product includes software developed by Jeffrey M. Hsu
42 * for the DragonFly Project.
44 * This requirement may be waived with permission from Jeffrey Hsu.
45 * Permission will be granted to any DragonFly user for free.
46 * This requirement will sunset and may be removed on Jan 31, 2006,
47 * after which the standard DragonFly license (as shown above) will
52 * Copyright (c) 1988, 1991, 1993
53 * The Regents of the University of California. All rights reserved.
55 * Redistribution and use in source and binary forms, with or without
56 * modification, are permitted provided that the following conditions
58 * 1. Redistributions of source code must retain the above copyright
59 * notice, this list of conditions and the following disclaimer.
60 * 2. Redistributions in binary form must reproduce the above copyright
61 * notice, this list of conditions and the following disclaimer in the
62 * documentation and/or other materials provided with the distribution.
63 * 3. All advertising materials mentioning features or use of this software
64 * must display the following acknowledgement:
65 * This product includes software developed by the University of
66 * California, Berkeley and its contributors.
67 * 4. Neither the name of the University nor the names of its contributors
68 * may be used to endorse or promote products derived from this software
69 * without specific prior written permission.
71 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
72 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
73 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
74 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
75 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
76 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
77 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
78 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
79 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
80 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
83 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
84 * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $
85 * $DragonFly: src/sys/net/rtsock.c,v 1.28 2005/06/14 19:47:30 joerg Exp $
88 #include <sys/param.h>
89 #include <sys/systm.h>
90 #include <sys/kernel.h>
91 #include <sys/sysctl.h>
93 #include <sys/malloc.h>
95 #include <sys/protosw.h>
96 #include <sys/socket.h>
97 #include <sys/socketvar.h>
98 #include <sys/domain.h>
99 #include <sys/thread2.h>
102 #include <net/route.h>
103 #include <net/raw_cb.h>
105 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
107 static struct route_cb {
115 static const struct sockaddr route_src = { 2, PF_ROUTE, };
121 struct sysctl_req *w_req;
125 rt_msg_mbuf (int, struct rt_addrinfo *);
126 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len);
127 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo);
128 static int rt_xaddrs (char *, char *, struct rt_addrinfo *);
129 static int sysctl_dumpentry (struct radix_node *rn, void *vw);
130 static int sysctl_iflist (int af, struct walkarg *w);
131 static int route_output(struct mbuf *, struct socket *, ...);
132 static void rt_setmetrics (u_long, struct rt_metrics *,
133 struct rt_metrics *);
136 * It really doesn't make any sense at all for this code to share much
137 * with raw_usrreq.c, since its functionality is so restricted. XXX
140 rts_abort(struct socket *so)
145 error = raw_usrreqs.pru_abort(so);
150 /* pru_accept is EOPNOTSUPP */
153 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai)
158 if (sotorawcb(so) != NULL)
159 return EISCONN; /* XXX panic? */
161 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
166 * The critical section is necessary to block protocols from sending
167 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
168 * this PCB is extant but incompletely initialized.
169 * Probably we should try to do more of this work beforehand and
170 * eliminate the critical section.
174 error = raw_attach(so, proto, ai->sb_rlimit);
181 switch(rp->rcb_proto.sp_protocol) {
186 route_cb.ip6_count++;
189 route_cb.ipx_count++;
195 rp->rcb_faddr = &route_src;
196 route_cb.any_count++;
198 so->so_options |= SO_USELOOPBACK;
204 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
209 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
215 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
220 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
225 /* pru_connect2 is EOPNOTSUPP */
226 /* pru_control is EOPNOTSUPP */
229 rts_detach(struct socket *so)
231 struct rawcb *rp = sotorawcb(so);
236 switch(rp->rcb_proto.sp_protocol) {
241 route_cb.ip6_count--;
244 route_cb.ipx_count--;
250 route_cb.any_count--;
252 error = raw_usrreqs.pru_detach(so);
258 rts_disconnect(struct socket *so)
263 error = raw_usrreqs.pru_disconnect(so);
268 /* pru_listen is EOPNOTSUPP */
271 rts_peeraddr(struct socket *so, struct sockaddr **nam)
276 error = raw_usrreqs.pru_peeraddr(so, nam);
281 /* pru_rcvd is EOPNOTSUPP */
282 /* pru_rcvoob is EOPNOTSUPP */
285 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
286 struct mbuf *control, struct thread *td)
291 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
296 /* pru_sense is null */
299 rts_shutdown(struct socket *so)
304 error = raw_usrreqs.pru_shutdown(so);
310 rts_sockaddr(struct socket *so, struct sockaddr **nam)
315 error = raw_usrreqs.pru_sockaddr(so, nam);
320 static struct pr_usrreqs route_usrreqs = {
321 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
322 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
323 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
324 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
325 sosend, soreceive, sopoll
328 static __inline sa_family_t
329 familyof(struct sockaddr *sa)
331 return (sa != NULL ? sa->sa_family : 0);
335 rts_input(struct mbuf *m, sa_family_t family)
337 static const struct sockaddr route_dst = { 2, PF_ROUTE, };
338 struct sockproto route_proto = { PF_ROUTE, family };
340 raw_input(m, &route_proto, &route_src, &route_dst);
344 reallocbuf(void *ptr, size_t len, size_t olen)
348 newptr = malloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
351 bcopy(ptr, newptr, olen);
357 * Internal helper routine for route_output().
360 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt,
361 struct rt_addrinfo *rtinfo)
364 struct rt_msghdr *rtm = *prtm;
366 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */
367 rtinfo->rti_dst = rt_key(rt);
368 rtinfo->rti_gateway = rt->rt_gateway;
369 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */
370 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */
371 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
372 if (rt->rt_ifp != NULL) {
373 rtinfo->rti_ifpaddr =
374 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
375 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
376 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
377 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
378 rtm->rtm_index = rt->rt_ifp->if_index;
380 rtinfo->rti_ifpaddr = NULL;
381 rtinfo->rti_ifaaddr = NULL;
385 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
386 if (rtm->rtm_msglen < msglen) {
387 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
392 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
394 rtm->rtm_flags = rt->rt_flags;
395 rtm->rtm_rmx = rt->rt_rmx;
396 rtm->rtm_addrs = rtinfo->rti_addrs;
403 route_output(struct mbuf *m, struct socket *so, ...)
405 struct rt_msghdr *rtm = NULL;
406 struct rtentry *rt = NULL;
407 struct rtentry *saved_nrt = NULL;
408 struct radix_node_head *rnh;
409 struct ifaddr *ifa = NULL;
410 struct rawcb *rp = NULL;
411 struct pr_output_info *oi;
412 struct rt_addrinfo rtinfo;
417 oi = __va_arg(ap, struct pr_output_info *);
420 #define gotoerr(e) { error = e; goto flush;}
423 (m->m_len < sizeof(long) &&
424 (m = m_pullup(m, sizeof(long))) == NULL))
426 if (!(m->m_flags & M_PKTHDR))
427 panic("route_output");
428 len = m->m_pkthdr.len;
429 if (len < sizeof(struct rt_msghdr) ||
430 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
431 rtinfo.rti_dst = NULL;
434 rtm = malloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
436 rtinfo.rti_dst = NULL;
439 m_copydata(m, 0, len, (caddr_t)rtm);
440 if (rtm->rtm_version != RTM_VERSION) {
441 rtinfo.rti_dst = NULL;
442 gotoerr(EPROTONOSUPPORT);
444 rtm->rtm_pid = oi->p_pid;
445 bzero(&rtinfo, sizeof(struct rt_addrinfo));
446 rtinfo.rti_addrs = rtm->rtm_addrs;
447 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
448 rtinfo.rti_dst = NULL;
451 rtinfo.rti_flags = rtm->rtm_flags;
452 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
453 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
456 if (rtinfo.rti_genmask != NULL) {
457 struct radix_node *n;
459 #define clen(s) (*(u_char *)(s))
460 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
462 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
463 bcmp((char *)rtinfo.rti_genmask + 1,
464 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
465 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
471 * Verify that the caller has the appropriate privilege; RTM_GET
472 * is the only operation the non-superuser is allowed.
474 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0)
477 switch (rtm->rtm_type) {
479 if (rtinfo.rti_gateway == NULL)
481 error = rtrequest1(RTM_ADD, &rtinfo, &saved_nrt);
482 if (error == 0 && saved_nrt != NULL) {
483 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
485 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
486 saved_nrt->rt_rmx.rmx_locks |=
487 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
488 --saved_nrt->rt_refcnt;
489 saved_nrt->rt_genmask = rtinfo.rti_genmask;
493 error = rtrequest1(RTM_DELETE, &rtinfo, &saved_nrt);
495 if ((rt = saved_nrt))
497 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
504 if ((rnh = rt_tables[rtinfo.rti_dst->sa_family]) == NULL)
505 gotoerr(EAFNOSUPPORT);
506 rt = (struct rtentry *)
507 rnh->rnh_lookup((char *)rtinfo.rti_dst,
508 (char *)rtinfo.rti_netmask, rnh);
513 switch(rtm->rtm_type) {
515 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
520 * new gateway could require new ifaddr, ifp;
521 * flags may also be different; ifp may be specified
522 * by ll sockaddr when protocol address is ambiguous
524 if (((rt->rt_flags & RTF_GATEWAY) &&
525 rtinfo.rti_gateway != NULL) ||
526 rtinfo.rti_ifpaddr != NULL ||
527 (rtinfo.rti_ifaaddr != NULL &&
528 sa_equal(rtinfo.rti_ifaaddr,
529 rt->rt_ifa->ifa_addr))) {
530 error = rt_getifa(&rtinfo);
534 if (rtinfo.rti_gateway != NULL) {
535 error = rt_setgate(rt, rt_key(rt),
540 if ((ifa = rtinfo.rti_ifa) != NULL) {
541 struct ifaddr *oifa = rt->rt_ifa;
544 if (oifa && oifa->ifa_rtrequest)
545 oifa->ifa_rtrequest(RTM_DELETE,
550 rt->rt_ifp = rtinfo.rti_ifp;
553 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
555 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
556 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &rtinfo);
557 if (rtinfo.rti_genmask != NULL)
558 rt->rt_genmask = rtinfo.rti_genmask;
563 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
564 rt->rt_rmx.rmx_locks |=
565 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
577 rtm->rtm_errno = error;
579 rtm->rtm_flags |= RTF_DONE;
584 * Check to see if we don't want our own messages.
586 if (!(so->so_options & SO_USELOOPBACK)) {
587 if (route_cb.any_count <= 1) {
593 /* There is another listener, so construct message */
597 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
598 if (m->m_pkthdr.len < rtm->rtm_msglen) {
601 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
602 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
606 rp->rcb_proto.sp_family = 0; /* Avoid us */
608 rts_input(m, familyof(rtinfo.rti_dst));
610 rp->rcb_proto.sp_family = PF_ROUTE;
615 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
617 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
618 setmetric(RTV_RPIPE, rmx_recvpipe);
619 setmetric(RTV_SPIPE, rmx_sendpipe);
620 setmetric(RTV_SSTHRESH, rmx_ssthresh);
621 setmetric(RTV_RTT, rmx_rtt);
622 setmetric(RTV_RTTVAR, rmx_rttvar);
623 setmetric(RTV_HOPCOUNT, rmx_hopcount);
624 setmetric(RTV_MTU, rmx_mtu);
625 setmetric(RTV_EXPIRE, rmx_expire);
630 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
633 * Extract the addresses of the passed sockaddrs.
634 * Do a little sanity checking so as to avoid bad memory references.
635 * This data is derived straight from userland.
638 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
643 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
644 if ((rtinfo->rti_addrs & (1 << i)) == 0)
646 sa = (struct sockaddr *)cp;
650 if ((cp + sa->sa_len) > cplim) {
655 * There are no more... Quit now.
656 * If there are more bits, they are in error.
657 * I've seen this. route(1) can evidently generate these.
658 * This causes kernel to core dump.
659 * For compatibility, if we see this, point to a safe address.
661 if (sa->sa_len == 0) {
662 static struct sockaddr sa_zero = {
663 sizeof sa_zero, AF_INET,
666 rtinfo->rti_info[i] = &sa_zero;
667 return (0); /* should be EINVAL but for compat */
670 /* Accept the sockaddr. */
671 rtinfo->rti_info[i] = sa;
672 cp += ROUNDUP(sa->sa_len);
678 rt_msghdrsize(int type)
683 return sizeof(struct ifa_msghdr);
686 return sizeof(struct ifma_msghdr);
688 return sizeof(struct if_msghdr);
690 return sizeof(struct if_announcemsghdr);
692 return sizeof(struct rt_msghdr);
697 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
701 len = rt_msghdrsize(type);
702 for (i = 0; i < RTAX_MAX; i++) {
703 if (rtinfo->rti_info[i] != NULL)
704 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
711 * Build a routing message in a buffer.
712 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
713 * to the end of the buffer after the message header.
715 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
716 * This side-effect can be avoided if we reorder the addrs bitmask field in all
717 * the route messages to line up so we can set it here instead of back in the
721 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
723 struct rt_msghdr *rtm;
727 rtm = (struct rt_msghdr *) buf;
728 rtm->rtm_version = RTM_VERSION;
729 rtm->rtm_type = type;
730 rtm->rtm_msglen = msglen;
732 cp = (char *)buf + rt_msghdrsize(type);
733 rtinfo->rti_addrs = 0;
734 for (i = 0; i < RTAX_MAX; i++) {
737 if ((sa = rtinfo->rti_info[i]) == NULL)
739 rtinfo->rti_addrs |= (1 << i);
740 dlen = ROUNDUP(sa->sa_len);
747 * Build a routing message in a mbuf chain.
748 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
749 * to the end of the mbuf after the message header.
751 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
752 * This side-effect can be avoided if we reorder the addrs bitmask field in all
753 * the route messages to line up so we can set it here instead of back in the
757 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
760 struct rt_msghdr *rtm;
764 hlen = rt_msghdrsize(type);
765 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
767 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
770 m->m_pkthdr.len = m->m_len = hlen;
771 m->m_pkthdr.rcvif = NULL;
772 rtinfo->rti_addrs = 0;
774 for (i = 0; i < RTAX_MAX; i++) {
778 if ((sa = rtinfo->rti_info[i]) == NULL)
780 rtinfo->rti_addrs |= (1 << i);
781 dlen = ROUNDUP(sa->sa_len);
782 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
785 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
789 rtm = mtod(m, struct rt_msghdr *);
791 rtm->rtm_msglen = len;
792 rtm->rtm_version = RTM_VERSION;
793 rtm->rtm_type = type;
798 * This routine is called to generate a message from the routing
799 * socket indicating that a redirect has occurred, a routing lookup
800 * has failed, or that a protocol has detected timeouts to a particular
804 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
806 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
807 struct rt_msghdr *rtm;
810 if (route_cb.any_count == 0)
812 m = rt_msg_mbuf(type, rtinfo);
815 rtm = mtod(m, struct rt_msghdr *);
816 rtm->rtm_flags = RTF_DONE | flags;
817 rtm->rtm_errno = error;
818 rtm->rtm_addrs = rtinfo->rti_addrs;
819 rts_input(m, familyof(dst));
823 rt_dstmsg(int type, struct sockaddr *dst, int error)
825 struct rt_msghdr *rtm;
826 struct rt_addrinfo addrs;
829 if (route_cb.any_count == 0)
831 bzero(&addrs, sizeof(struct rt_addrinfo));
832 addrs.rti_info[RTAX_DST] = dst;
833 m = rt_msg_mbuf(type, &addrs);
836 rtm = mtod(m, struct rt_msghdr *);
837 rtm->rtm_flags = RTF_DONE;
838 rtm->rtm_errno = error;
839 rtm->rtm_addrs = addrs.rti_addrs;
840 rts_input(m, familyof(dst));
844 * This routine is called to generate a message from the routing
845 * socket indicating that the status of a network interface has changed.
848 rt_ifmsg(struct ifnet *ifp)
850 struct if_msghdr *ifm;
852 struct rt_addrinfo rtinfo;
854 if (route_cb.any_count == 0)
856 bzero(&rtinfo, sizeof(struct rt_addrinfo));
857 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
860 ifm = mtod(m, struct if_msghdr *);
861 ifm->ifm_index = ifp->if_index;
862 ifm->ifm_flags = ifp->if_flags;
863 ifm->ifm_data = ifp->if_data;
869 rt_ifamsg(int cmd, struct ifaddr *ifa)
871 struct ifa_msghdr *ifam;
872 struct rt_addrinfo rtinfo;
874 struct ifnet *ifp = ifa->ifa_ifp;
876 bzero(&rtinfo, sizeof(struct rt_addrinfo));
877 rtinfo.rti_ifaaddr = ifa->ifa_addr;
878 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
879 rtinfo.rti_netmask = ifa->ifa_netmask;
880 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
882 m = rt_msg_mbuf(cmd, &rtinfo);
886 ifam = mtod(m, struct ifa_msghdr *);
887 ifam->ifam_index = ifp->if_index;
888 ifam->ifam_metric = ifa->ifa_metric;
889 ifam->ifam_flags = ifa->ifa_flags;
890 ifam->ifam_addrs = rtinfo.rti_addrs;
892 rts_input(m, familyof(ifa->ifa_addr));
896 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
898 struct rt_msghdr *rtm;
899 struct rt_addrinfo rtinfo;
901 struct sockaddr *dst;
906 bzero(&rtinfo, sizeof(struct rt_addrinfo));
907 rtinfo.rti_dst = dst = rt_key(rt);
908 rtinfo.rti_gateway = rt->rt_gateway;
909 rtinfo.rti_netmask = rt_mask(rt);
911 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
912 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
914 m = rt_msg_mbuf(cmd, &rtinfo);
918 rtm = mtod(m, struct rt_msghdr *);
920 rtm->rtm_index = ifp->if_index;
921 rtm->rtm_flags |= rt->rt_flags;
922 rtm->rtm_errno = error;
923 rtm->rtm_addrs = rtinfo.rti_addrs;
925 rts_input(m, familyof(dst));
929 * This is called to generate messages from the routing socket
930 * indicating a network interface has had addresses associated with it.
931 * if we ever reverse the logic and replace messages TO the routing
932 * socket indicate a request to configure interfaces, then it will
933 * be unnecessary as the routing socket will automatically generate
937 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
939 if (route_cb.any_count == 0)
942 if (cmd == RTM_ADD) {
943 rt_ifamsg(RTM_NEWADDR, ifa);
944 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
946 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
947 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
948 rt_ifamsg(RTM_DELADDR, ifa);
953 * This is the analogue to the rt_newaddrmsg which performs the same
954 * function but for multicast group memberhips. This is easier since
955 * there is no route state to worry about.
958 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
960 struct rt_addrinfo rtinfo;
961 struct mbuf *m = NULL;
962 struct ifnet *ifp = ifma->ifma_ifp;
963 struct ifma_msghdr *ifmam;
965 if (route_cb.any_count == 0)
968 bzero(&rtinfo, sizeof(struct rt_addrinfo));
969 rtinfo.rti_ifaaddr = ifma->ifma_addr;
970 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrhead))
971 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
973 * If a link-layer address is present, present it as a ``gateway''
974 * (similarly to how ARP entries, e.g., are presented).
976 rtinfo.rti_gateway = ifma->ifma_lladdr;
978 m = rt_msg_mbuf(cmd, &rtinfo);
982 ifmam = mtod(m, struct ifma_msghdr *);
983 ifmam->ifmam_index = ifp->if_index;
984 ifmam->ifmam_addrs = rtinfo.rti_addrs;
986 rts_input(m, familyof(ifma->ifma_addr));
990 * This is called to generate routing socket messages indicating
991 * network interface arrival and departure.
994 rt_ifannouncemsg(struct ifnet *ifp, int what)
996 struct rt_addrinfo addrinfo;
998 struct if_announcemsghdr *ifan;
1000 if (route_cb.any_count == 0)
1003 bzero(&addrinfo, sizeof addrinfo);
1004 m = rt_msg_mbuf(RTM_IFANNOUNCE, &addrinfo);
1008 ifan = mtod(m, struct if_announcemsghdr *);
1009 ifan->ifan_index = ifp->if_index;
1010 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1011 ifan->ifan_what = what;
1017 resizewalkarg(struct walkarg *w, int len)
1021 newptr = malloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1024 if (w->w_tmem != NULL)
1025 free(w->w_tmem, M_RTABLE);
1027 w->w_tmemsize = len;
1032 * This is used in dumping the kernel table via sysctl().
1035 sysctl_dumpentry(struct radix_node *rn, void *vw)
1037 struct walkarg *w = vw;
1038 struct rtentry *rt = (struct rtentry *)rn;
1039 struct rt_addrinfo rtinfo;
1042 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1045 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1046 rtinfo.rti_dst = rt_key(rt);
1047 rtinfo.rti_gateway = rt->rt_gateway;
1048 rtinfo.rti_netmask = rt_mask(rt);
1049 rtinfo.rti_genmask = rt->rt_genmask;
1050 if (rt->rt_ifp != NULL) {
1051 rtinfo.rti_ifpaddr =
1052 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
1053 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1054 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1055 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1057 msglen = rt_msgsize(RTM_GET, &rtinfo);
1058 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1060 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1061 if (w->w_req != NULL) {
1062 struct rt_msghdr *rtm = w->w_tmem;
1064 rtm->rtm_flags = rt->rt_flags;
1065 rtm->rtm_use = rt->rt_use;
1066 rtm->rtm_rmx = rt->rt_rmx;
1067 rtm->rtm_index = rt->rt_ifp->if_index;
1068 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1069 rtm->rtm_addrs = rtinfo.rti_addrs;
1070 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1077 sysctl_iflist(int af, struct walkarg *w)
1081 struct rt_addrinfo rtinfo;
1084 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1085 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1086 if (w->w_arg && w->w_arg != ifp->if_index)
1088 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1089 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1090 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1091 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1093 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1094 rtinfo.rti_ifpaddr = NULL;
1095 if (w->w_req != NULL && w->w_tmem != NULL) {
1096 struct if_msghdr *ifm = w->w_tmem;
1098 ifm->ifm_index = ifp->if_index;
1099 ifm->ifm_flags = ifp->if_flags;
1100 ifm->ifm_data = ifp->if_data;
1101 ifm->ifm_addrs = rtinfo.rti_addrs;
1102 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1106 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1107 if (af && af != ifa->ifa_addr->sa_family)
1109 if (curproc->p_ucred->cr_prison &&
1110 prison_if(curthread, ifa->ifa_addr))
1112 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1113 rtinfo.rti_netmask = ifa->ifa_netmask;
1114 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1115 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1116 if (w->w_tmemsize < msglen &&
1117 resizewalkarg(w, msglen) != 0)
1119 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1120 if (w->w_req != NULL) {
1121 struct ifa_msghdr *ifam = w->w_tmem;
1123 ifam->ifam_index = ifa->ifa_ifp->if_index;
1124 ifam->ifam_flags = ifa->ifa_flags;
1125 ifam->ifam_metric = ifa->ifa_metric;
1126 ifam->ifam_addrs = rtinfo.rti_addrs;
1127 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1132 rtinfo.rti_netmask = NULL;
1133 rtinfo.rti_ifaaddr = NULL;
1134 rtinfo.rti_bcastaddr = NULL;
1140 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1142 int *name = (int *)arg1;
1143 u_int namelen = arg2;
1144 struct radix_node_head *rnh;
1145 int i, error = EINVAL;
1156 bzero(&w, sizeof w);
1166 for (i = 1; i <= AF_MAX; i++)
1167 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
1168 (error = rnh->rnh_walktree(rnh,
1169 sysctl_dumpentry, &w)))
1174 error = sysctl_iflist(af, &w);
1177 if (w.w_tmem != NULL)
1178 free(w.w_tmem, M_RTABLE);
1182 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1185 * Definitions of protocols supported in the ROUTE domain.
1188 extern struct domain routedomain; /* or at least forward */
1190 static struct protosw routesw[] = {
1191 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1192 0, route_output, raw_ctlinput, 0,
1199 static struct domain routedomain = {
1200 PF_ROUTE, "route", NULL, NULL, NULL,
1201 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],