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 1.21 2005/01/26 23:09:57 hsu 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>
100 #include <machine/stdarg.h>
103 #include <net/route.h>
104 #include <net/raw_cb.h>
106 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
108 static struct route_cb {
116 static const struct sockaddr route_src = { 2, PF_ROUTE, };
122 struct sysctl_req *w_req;
126 rt_msg_mbuf (int, struct rt_addrinfo *);
127 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len);
128 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo);
129 static int rt_xaddrs (char *, char *, struct rt_addrinfo *);
130 static int sysctl_dumpentry (struct radix_node *rn, void *vw);
131 static int sysctl_iflist (int af, struct walkarg *w);
132 static int route_output(struct mbuf *, struct socket *, ...);
133 static void rt_setmetrics (u_long, struct rt_metrics *,
134 struct rt_metrics *);
137 * It really doesn't make any sense at all for this code to share much
138 * with raw_usrreq.c, since its functionality is so restricted. XXX
141 rts_abort(struct socket *so)
146 error = raw_usrreqs.pru_abort(so);
151 /* pru_accept is EOPNOTSUPP */
154 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai)
159 if (sotorawcb(so) != NULL)
160 return EISCONN; /* XXX panic? */
162 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
167 * The splnet() is necessary to block protocols from sending
168 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
169 * this PCB is extant but incompletely initialized.
170 * Probably we should try to do more of this work beforehand and
175 error = raw_attach(so, proto, ai->sb_rlimit);
182 switch(rp->rcb_proto.sp_protocol) {
187 route_cb.ip6_count++;
190 route_cb.ipx_count++;
196 rp->rcb_faddr = &route_src;
197 route_cb.any_count++;
199 so->so_options |= SO_USELOOPBACK;
205 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
210 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
216 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
221 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
226 /* pru_connect2 is EOPNOTSUPP */
227 /* pru_control is EOPNOTSUPP */
230 rts_detach(struct socket *so)
232 struct rawcb *rp = sotorawcb(so);
237 switch(rp->rcb_proto.sp_protocol) {
242 route_cb.ip6_count--;
245 route_cb.ipx_count--;
251 route_cb.any_count--;
253 error = raw_usrreqs.pru_detach(so);
259 rts_disconnect(struct socket *so)
264 error = raw_usrreqs.pru_disconnect(so);
269 /* pru_listen is EOPNOTSUPP */
272 rts_peeraddr(struct socket *so, struct sockaddr **nam)
277 error = raw_usrreqs.pru_peeraddr(so, nam);
282 /* pru_rcvd is EOPNOTSUPP */
283 /* pru_rcvoob is EOPNOTSUPP */
286 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
287 struct mbuf *control, struct thread *td)
292 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
297 /* pru_sense is null */
300 rts_shutdown(struct socket *so)
305 error = raw_usrreqs.pru_shutdown(so);
311 rts_sockaddr(struct socket *so, struct sockaddr **nam)
316 error = raw_usrreqs.pru_sockaddr(so, nam);
321 static struct pr_usrreqs route_usrreqs = {
322 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
323 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
324 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
325 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
326 sosend, soreceive, sopoll
329 static __inline sa_family_t
330 familyof(struct sockaddr *sa)
332 return (sa != NULL ? sa->sa_family : 0);
336 rts_input(struct mbuf *m, sa_family_t family)
338 static const struct sockaddr route_dst = { 2, PF_ROUTE, };
339 struct sockproto route_proto = { PF_ROUTE, family };
341 raw_input(m, &route_proto, &route_src, &route_dst);
345 reallocbuf(void *ptr, size_t len, size_t olen)
349 newptr = malloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
352 bcopy(ptr, newptr, olen);
358 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt,
359 struct rt_addrinfo *rtinfo)
362 struct rt_msghdr *rtm = *prtm;
364 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */
365 rtinfo->rti_dst = rt_key(rt);
366 rtinfo->rti_gateway = rt->rt_gateway;
367 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */
368 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */
369 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
370 if (rt->rt_ifp != NULL) {
371 rtinfo->rti_ifpaddr =
372 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
373 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
374 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
375 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
376 rtm->rtm_index = rt->rt_ifp->if_index;
378 rtinfo->rti_ifpaddr = NULL;
379 rtinfo->rti_ifaaddr = NULL;
383 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
384 if (rtm->rtm_msglen < msglen) {
385 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
390 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
392 rtm->rtm_flags = rt->rt_flags;
393 rtm->rtm_rmx = rt->rt_rmx;
394 rtm->rtm_addrs = rtinfo->rti_addrs;
401 route_output(struct mbuf *m, struct socket *so, ...)
403 struct rt_msghdr *rtm = NULL;
404 struct rtentry *rt = NULL;
405 struct rtentry *saved_nrt = NULL;
406 struct radix_node_head *rnh;
407 struct ifaddr *ifa = NULL;
408 struct rawcb *rp = NULL;
409 struct pr_output_info *oi;
410 struct rt_addrinfo rtinfo;
415 oi = __va_arg(ap, struct pr_output_info *);
418 #define gotoerr(e) { error = e; goto flush;}
421 (m->m_len < sizeof(long) &&
422 (m = m_pullup(m, sizeof(long))) == NULL))
424 if (!(m->m_flags & M_PKTHDR))
425 panic("route_output");
426 len = m->m_pkthdr.len;
427 if (len < sizeof(struct rt_msghdr) ||
428 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
429 rtinfo.rti_dst = NULL;
432 rtm = malloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
434 rtinfo.rti_dst = NULL;
437 m_copydata(m, 0, len, (caddr_t)rtm);
438 if (rtm->rtm_version != RTM_VERSION) {
439 rtinfo.rti_dst = NULL;
440 gotoerr(EPROTONOSUPPORT);
442 rtm->rtm_pid = oi->p_pid;
443 bzero(&rtinfo, sizeof(struct rt_addrinfo));
444 rtinfo.rti_addrs = rtm->rtm_addrs;
445 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
446 rtinfo.rti_dst = NULL;
449 rtinfo.rti_flags = rtm->rtm_flags;
450 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
451 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
454 if (rtinfo.rti_genmask != NULL) {
455 struct radix_node *n;
457 #define clen(s) (*(u_char *)(s))
458 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
460 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
461 bcmp((char *)rtinfo.rti_genmask + 1,
462 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
463 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
469 * Verify that the caller has the appropriate privilege; RTM_GET
470 * is the only operation the non-superuser is allowed.
472 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0)
475 switch (rtm->rtm_type) {
477 if (rtinfo.rti_gateway == NULL)
479 error = rtrequest1(RTM_ADD, &rtinfo, &saved_nrt);
480 if (error == 0 && saved_nrt != NULL) {
481 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
483 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
484 saved_nrt->rt_rmx.rmx_locks |=
485 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
486 --saved_nrt->rt_refcnt;
487 saved_nrt->rt_genmask = rtinfo.rti_genmask;
491 error = rtrequest1(RTM_DELETE, &rtinfo, &saved_nrt);
493 if ((rt = saved_nrt))
495 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
502 if ((rnh = rt_tables[rtinfo.rti_dst->sa_family]) == NULL)
503 gotoerr(EAFNOSUPPORT);
504 rt = (struct rtentry *)
505 rnh->rnh_lookup((char *)rtinfo.rti_dst,
506 (char *)rtinfo.rti_netmask, rnh);
511 switch(rtm->rtm_type) {
513 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
518 * new gateway could require new ifaddr, ifp;
519 * flags may also be different; ifp may be specified
520 * by ll sockaddr when protocol address is ambiguous
522 if (((rt->rt_flags & RTF_GATEWAY) &&
523 rtinfo.rti_gateway != NULL) ||
524 rtinfo.rti_ifpaddr != NULL ||
525 (rtinfo.rti_ifaaddr != NULL &&
526 sa_equal(rtinfo.rti_ifaaddr,
527 rt->rt_ifa->ifa_addr))) {
528 error = rt_getifa(&rtinfo);
532 if (rtinfo.rti_gateway != NULL) {
533 error = rt_setgate(rt, rt_key(rt),
538 if ((ifa = rtinfo.rti_ifa) != NULL) {
539 struct ifaddr *oifa = rt->rt_ifa;
542 if (oifa && oifa->ifa_rtrequest)
543 oifa->ifa_rtrequest(RTM_DELETE,
548 rt->rt_ifp = rtinfo.rti_ifp;
551 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
553 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
554 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &rtinfo);
555 if (rtinfo.rti_genmask != NULL)
556 rt->rt_genmask = rtinfo.rti_genmask;
561 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
562 rt->rt_rmx.rmx_locks |=
563 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
575 rtm->rtm_errno = error;
577 rtm->rtm_flags |= RTF_DONE;
582 * Check to see if we don't want our own messages.
584 if (!(so->so_options & SO_USELOOPBACK)) {
585 if (route_cb.any_count <= 1) {
591 /* There is another listener, so construct message */
595 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
596 if (m->m_pkthdr.len < rtm->rtm_msglen) {
599 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
600 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
604 rp->rcb_proto.sp_family = 0; /* Avoid us */
606 rts_input(m, familyof(rtinfo.rti_dst));
608 rp->rcb_proto.sp_family = PF_ROUTE;
613 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
615 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
616 setmetric(RTV_RPIPE, rmx_recvpipe);
617 setmetric(RTV_SPIPE, rmx_sendpipe);
618 setmetric(RTV_SSTHRESH, rmx_ssthresh);
619 setmetric(RTV_RTT, rmx_rtt);
620 setmetric(RTV_RTTVAR, rmx_rttvar);
621 setmetric(RTV_HOPCOUNT, rmx_hopcount);
622 setmetric(RTV_MTU, rmx_mtu);
623 setmetric(RTV_EXPIRE, rmx_expire);
628 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
631 * Extract the addresses of the passed sockaddrs.
632 * Do a little sanity checking so as to avoid bad memory references.
633 * This data is derived straight from userland.
636 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
641 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
642 if ((rtinfo->rti_addrs & (1 << i)) == 0)
644 sa = (struct sockaddr *)cp;
648 if ((cp + sa->sa_len) > cplim) {
653 * There are no more... Quit now.
654 * If there are more bits, they are in error.
655 * I've seen this. route(1) can evidently generate these.
656 * This causes kernel to core dump.
657 * For compatibility, if we see this, point to a safe address.
659 if (sa->sa_len == 0) {
660 static struct sockaddr sa_zero = {
661 sizeof sa_zero, AF_INET,
664 rtinfo->rti_info[i] = &sa_zero;
665 return (0); /* should be EINVAL but for compat */
668 /* Accept the sockaddr. */
669 rtinfo->rti_info[i] = sa;
670 cp += ROUNDUP(sa->sa_len);
676 rt_msghdrsize(int type)
681 return sizeof(struct ifa_msghdr);
684 return sizeof(struct ifma_msghdr);
686 return sizeof(struct if_msghdr);
688 return sizeof(struct if_announcemsghdr);
690 return sizeof(struct rt_msghdr);
695 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
699 len = rt_msghdrsize(type);
700 for (i = 0; i < RTAX_MAX; i++) {
701 if (rtinfo->rti_info[i] != NULL)
702 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
709 * Build a routing message in a buffer.
710 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
711 * to the end of the buffer after the message header.
713 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
714 * This side-effect can be avoided if we reorder the addrs bitmask field in all
715 * the route messages to line up so we can set it here instead of back in the
719 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
721 struct rt_msghdr *rtm;
725 rtm = (struct rt_msghdr *) buf;
726 rtm->rtm_version = RTM_VERSION;
727 rtm->rtm_type = type;
728 rtm->rtm_msglen = msglen;
730 cp = (char *)buf + rt_msghdrsize(type);
731 rtinfo->rti_addrs = 0;
732 for (i = 0; i < RTAX_MAX; i++) {
735 if ((sa = rtinfo->rti_info[i]) == NULL)
737 rtinfo->rti_addrs |= (1 << i);
738 dlen = ROUNDUP(sa->sa_len);
745 * Build a routing message in a mbuf chain.
746 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
747 * to the end of the mbuf after the message header.
749 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
750 * This side-effect can be avoided if we reorder the addrs bitmask field in all
751 * the route messages to line up so we can set it here instead of back in the
755 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
758 struct rt_msghdr *rtm;
762 hlen = rt_msghdrsize(type);
763 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
765 m = m_gethdr(MB_DONTWAIT, MT_DATA);
769 MCLGET(m, MB_DONTWAIT);
770 if (!(m->m_flags & M_EXT)) {
775 m->m_pkthdr.len = m->m_len = hlen;
776 m->m_pkthdr.rcvif = NULL;
777 rtinfo->rti_addrs = 0;
779 for (i = 0; i < RTAX_MAX; i++) {
783 if ((sa = rtinfo->rti_info[i]) == NULL)
785 rtinfo->rti_addrs |= (1 << i);
786 dlen = ROUNDUP(sa->sa_len);
787 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
790 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
794 rtm = mtod(m, struct rt_msghdr *);
796 rtm->rtm_msglen = len;
797 rtm->rtm_version = RTM_VERSION;
798 rtm->rtm_type = type;
803 * This routine is called to generate a message from the routing
804 * socket indicating that a redirect has occurred, a routing lookup
805 * has failed, or that a protocol has detected timeouts to a particular
809 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
811 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
812 struct rt_msghdr *rtm;
815 if (route_cb.any_count == 0)
817 m = rt_msg_mbuf(type, rtinfo);
820 rtm = mtod(m, struct rt_msghdr *);
821 rtm->rtm_flags = RTF_DONE | flags;
822 rtm->rtm_errno = error;
823 rtm->rtm_addrs = rtinfo->rti_addrs;
824 rts_input(m, familyof(dst));
828 rt_dstmsg(int type, struct sockaddr *dst, int error)
830 struct rt_msghdr *rtm;
831 struct rt_addrinfo addrs;
834 if (route_cb.any_count == 0)
836 bzero(&addrs, sizeof(struct rt_addrinfo));
837 addrs.rti_info[RTAX_DST] = dst;
838 m = rt_msg_mbuf(type, &addrs);
841 rtm = mtod(m, struct rt_msghdr *);
842 rtm->rtm_flags = RTF_DONE;
843 rtm->rtm_errno = error;
844 rtm->rtm_addrs = addrs.rti_addrs;
845 rts_input(m, familyof(dst));
849 * This routine is called to generate a message from the routing
850 * socket indicating that the status of a network interface has changed.
853 rt_ifmsg(struct ifnet *ifp)
855 struct if_msghdr *ifm;
857 struct rt_addrinfo rtinfo;
859 if (route_cb.any_count == 0)
861 bzero(&rtinfo, sizeof(struct rt_addrinfo));
862 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
865 ifm = mtod(m, struct if_msghdr *);
866 ifm->ifm_index = ifp->if_index;
867 ifm->ifm_flags = (u_short)ifp->if_flags;
868 ifm->ifm_data = ifp->if_data;
874 rt_ifamsg(int cmd, struct ifaddr *ifa)
876 struct ifa_msghdr *ifam;
877 struct rt_addrinfo rtinfo;
879 struct ifnet *ifp = ifa->ifa_ifp;
881 bzero(&rtinfo, sizeof(struct rt_addrinfo));
882 rtinfo.rti_ifaaddr = ifa->ifa_addr;
883 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
884 rtinfo.rti_netmask = ifa->ifa_netmask;
885 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
887 m = rt_msg_mbuf(cmd, &rtinfo);
891 ifam = mtod(m, struct ifa_msghdr *);
892 ifam->ifam_index = ifp->if_index;
893 ifam->ifam_metric = ifa->ifa_metric;
894 ifam->ifam_flags = ifa->ifa_flags;
895 ifam->ifam_addrs = rtinfo.rti_addrs;
897 rts_input(m, familyof(ifa->ifa_addr));
901 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
903 struct rt_msghdr *rtm;
904 struct rt_addrinfo rtinfo;
906 struct sockaddr *dst;
911 bzero(&rtinfo, sizeof(struct rt_addrinfo));
912 rtinfo.rti_dst = dst = rt_key(rt);
913 rtinfo.rti_gateway = rt->rt_gateway;
914 rtinfo.rti_netmask = rt_mask(rt);
916 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
917 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
919 m = rt_msg_mbuf(cmd, &rtinfo);
923 rtm = mtod(m, struct rt_msghdr *);
925 rtm->rtm_index = ifp->if_index;
926 rtm->rtm_flags |= rt->rt_flags;
927 rtm->rtm_errno = error;
928 rtm->rtm_addrs = rtinfo.rti_addrs;
930 rts_input(m, familyof(dst));
934 * This is called to generate messages from the routing socket
935 * indicating a network interface has had addresses associated with it.
936 * if we ever reverse the logic and replace messages TO the routing
937 * socket indicate a request to configure interfaces, then it will
938 * be unnecessary as the routing socket will automatically generate
942 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
944 if (route_cb.any_count == 0)
947 if (cmd == RTM_ADD) {
948 rt_ifamsg(RTM_NEWADDR, ifa);
949 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
951 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
952 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
953 rt_ifamsg(RTM_DELADDR, ifa);
958 * This is the analogue to the rt_newaddrmsg which performs the same
959 * function but for multicast group memberhips. This is easier since
960 * there is no route state to worry about.
963 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
965 struct rt_addrinfo rtinfo;
966 struct mbuf *m = NULL;
967 struct ifnet *ifp = ifma->ifma_ifp;
968 struct ifma_msghdr *ifmam;
970 if (route_cb.any_count == 0)
973 bzero(&rtinfo, sizeof(struct rt_addrinfo));
974 rtinfo.rti_ifaaddr = ifma->ifma_addr;
976 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
978 rtinfo.rti_ifpaddr = NULL;
980 * If a link-layer address is present, present it as a ``gateway''
981 * (similarly to how ARP entries, e.g., are presented).
983 rtinfo.rti_gateway = ifma->ifma_lladdr;
985 m = rt_msg_mbuf(cmd, &rtinfo);
989 ifmam = mtod(m, struct ifma_msghdr *);
990 ifmam->ifmam_index = ifp->if_index;
991 ifmam->ifmam_addrs = rtinfo.rti_addrs;
993 rts_input(m, familyof(ifma->ifma_addr));
997 * This is called to generate routing socket messages indicating
998 * network interface arrival and departure.
1001 rt_ifannouncemsg(struct ifnet *ifp, int what)
1003 struct rt_addrinfo addrinfo;
1005 struct if_announcemsghdr *ifan;
1007 if (route_cb.any_count == 0)
1010 bzero(&addrinfo, sizeof addrinfo);
1011 m = rt_msg_mbuf(RTM_IFANNOUNCE, &addrinfo);
1015 ifan = mtod(m, struct if_announcemsghdr *);
1016 ifan->ifan_index = ifp->if_index;
1017 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1018 ifan->ifan_what = what;
1024 resizewalkarg(struct walkarg *w, int len)
1028 newptr = malloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1031 if (w->w_tmem != NULL)
1032 free(w->w_tmem, M_RTABLE);
1034 w->w_tmemsize = len;
1039 * This is used in dumping the kernel table via sysctl().
1042 sysctl_dumpentry(struct radix_node *rn, void *vw)
1044 struct walkarg *w = vw;
1045 struct rtentry *rt = (struct rtentry *)rn;
1046 struct rt_addrinfo rtinfo;
1049 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1052 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1053 rtinfo.rti_dst = rt_key(rt);
1054 rtinfo.rti_gateway = rt->rt_gateway;
1055 rtinfo.rti_netmask = rt_mask(rt);
1056 rtinfo.rti_genmask = rt->rt_genmask;
1057 if (rt->rt_ifp != NULL) {
1058 rtinfo.rti_ifpaddr =
1059 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
1060 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1061 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1062 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1064 msglen = rt_msgsize(RTM_GET, &rtinfo);
1065 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1067 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1068 if (w->w_req != NULL) {
1069 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1071 rtm->rtm_flags = rt->rt_flags;
1072 rtm->rtm_use = rt->rt_use;
1073 rtm->rtm_rmx = rt->rt_rmx;
1074 rtm->rtm_index = rt->rt_ifp->if_index;
1075 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1076 rtm->rtm_addrs = rtinfo.rti_addrs;
1077 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1084 sysctl_iflist(int af, struct walkarg *w)
1088 struct rt_addrinfo rtinfo;
1091 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1092 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1093 if (w->w_arg && w->w_arg != ifp->if_index)
1095 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1096 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1097 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1098 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1100 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1101 rtinfo.rti_ifpaddr = NULL;
1102 if (w->w_req != NULL && w->w_tmem != NULL) {
1103 struct if_msghdr *ifm;
1105 ifm = (struct if_msghdr *)w->w_tmem;
1106 ifm->ifm_index = ifp->if_index;
1107 ifm->ifm_flags = (u_short)ifp->if_flags;
1108 ifm->ifm_data = ifp->if_data;
1109 ifm->ifm_addrs = rtinfo.rti_addrs;
1110 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1114 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1115 if (af && af != ifa->ifa_addr->sa_family)
1117 if (curproc->p_ucred->cr_prison &&
1118 prison_if(curthread, ifa->ifa_addr))
1120 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1121 rtinfo.rti_netmask = ifa->ifa_netmask;
1122 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1123 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1124 if (w->w_tmemsize < msglen &&
1125 resizewalkarg(w, msglen) != 0)
1127 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1128 if (w->w_req != NULL) {
1129 struct ifa_msghdr *ifam;
1131 ifam = (struct ifa_msghdr *)w->w_tmem;
1132 ifam->ifam_index = ifa->ifa_ifp->if_index;
1133 ifam->ifam_flags = ifa->ifa_flags;
1134 ifam->ifam_metric = ifa->ifa_metric;
1135 ifam->ifam_addrs = rtinfo.rti_addrs;
1136 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1141 rtinfo.rti_netmask = NULL;
1142 rtinfo.rti_ifaaddr = NULL;
1143 rtinfo.rti_bcastaddr = NULL;
1149 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1151 int *name = (int *)arg1;
1152 u_int namelen = arg2;
1153 struct radix_node_head *rnh;
1154 int i, s, error = EINVAL;
1165 bzero(&w, sizeof w);
1175 for (i = 1; i <= AF_MAX; i++)
1176 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
1177 (error = rnh->rnh_walktree(rnh,
1178 sysctl_dumpentry, &w)))
1183 error = sysctl_iflist(af, &w);
1186 if (w.w_tmem != NULL)
1187 free(w.w_tmem, M_RTABLE);
1191 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1194 * Definitions of protocols supported in the ROUTE domain.
1197 extern struct domain routedomain; /* or at least forward */
1199 static struct protosw routesw[] = {
1200 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1201 0, route_output, raw_ctlinput, 0,
1208 static struct domain routedomain =
1209 { PF_ROUTE, "route", 0, 0, 0,
1210 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])] };