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
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14 * documentation and/or other materials provided with the distribution.
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16 * contributors may be used to endorse or promote products derived
17 * from this software without specific, prior written permission.
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34 * Copyright (c) 1988, 1991, 1993
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38 * modification, are permitted provided that the following conditions
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50 * may be used to endorse or promote products derived from this software
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55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
66 * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $
67 * $DragonFly: src/sys/net/rtsock.c,v 1.42 2008/01/06 16:55:51 swildner Exp $
72 #include <sys/param.h>
73 #include <sys/systm.h>
74 #include <sys/kernel.h>
75 #include <sys/sysctl.h>
77 #include <sys/malloc.h>
79 #include <sys/protosw.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/domain.h>
83 #include <sys/thread2.h>
86 #include <net/route.h>
87 #include <net/raw_cb.h>
88 #include <net/netmsg2.h>
91 extern void sctp_add_ip_address(struct ifaddr *ifa);
92 extern void sctp_delete_ip_address(struct ifaddr *ifa);
95 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
97 static struct route_cb {
105 static const struct sockaddr route_src = { 2, PF_ROUTE, };
111 struct sysctl_req *w_req;
115 rt_msg_mbuf (int, struct rt_addrinfo *);
116 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len);
117 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo);
118 static int rt_xaddrs (char *, char *, struct rt_addrinfo *);
119 static int sysctl_dumpentry (struct radix_node *rn, void *vw);
120 static int sysctl_iflist (int af, struct walkarg *w);
121 static int route_output(struct mbuf *, struct socket *, ...);
122 static void rt_setmetrics (u_long, struct rt_metrics *,
123 struct rt_metrics *);
126 * It really doesn't make any sense at all for this code to share much
127 * with raw_usrreq.c, since its functionality is so restricted. XXX
130 rts_abort(struct socket *so)
135 error = raw_usrreqs.pru_abort(so);
140 /* pru_accept is EOPNOTSUPP */
143 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai)
148 if (sotorawcb(so) != NULL)
149 return EISCONN; /* XXX panic? */
151 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
154 * The critical section is necessary to block protocols from sending
155 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
156 * this PCB is extant but incompletely initialized.
157 * Probably we should try to do more of this work beforehand and
158 * eliminate the critical section.
162 error = raw_attach(so, proto, ai->sb_rlimit);
169 switch(rp->rcb_proto.sp_protocol) {
174 route_cb.ip6_count++;
177 route_cb.ipx_count++;
183 rp->rcb_faddr = &route_src;
184 route_cb.any_count++;
186 so->so_options |= SO_USELOOPBACK;
192 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
197 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
203 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
208 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
213 /* pru_connect2 is EOPNOTSUPP */
214 /* pru_control is EOPNOTSUPP */
217 rts_detach(struct socket *so)
219 struct rawcb *rp = sotorawcb(so);
224 switch(rp->rcb_proto.sp_protocol) {
229 route_cb.ip6_count--;
232 route_cb.ipx_count--;
238 route_cb.any_count--;
240 error = raw_usrreqs.pru_detach(so);
246 rts_disconnect(struct socket *so)
251 error = raw_usrreqs.pru_disconnect(so);
256 /* pru_listen is EOPNOTSUPP */
259 rts_peeraddr(struct socket *so, struct sockaddr **nam)
264 error = raw_usrreqs.pru_peeraddr(so, nam);
269 /* pru_rcvd is EOPNOTSUPP */
270 /* pru_rcvoob is EOPNOTSUPP */
273 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
274 struct mbuf *control, struct thread *td)
279 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
284 /* pru_sense is null */
287 rts_shutdown(struct socket *so)
292 error = raw_usrreqs.pru_shutdown(so);
298 rts_sockaddr(struct socket *so, struct sockaddr **nam)
303 error = raw_usrreqs.pru_sockaddr(so, nam);
308 static struct pr_usrreqs route_usrreqs = {
309 .pru_abort = rts_abort,
310 .pru_accept = pru_accept_notsupp,
311 .pru_attach = rts_attach,
312 .pru_bind = rts_bind,
313 .pru_connect = rts_connect,
314 .pru_connect2 = pru_connect2_notsupp,
315 .pru_control = pru_control_notsupp,
316 .pru_detach = rts_detach,
317 .pru_disconnect = rts_disconnect,
318 .pru_listen = pru_listen_notsupp,
319 .pru_peeraddr = rts_peeraddr,
320 .pru_rcvd = pru_rcvd_notsupp,
321 .pru_rcvoob = pru_rcvoob_notsupp,
322 .pru_send = rts_send,
323 .pru_sense = pru_sense_null,
324 .pru_shutdown = rts_shutdown,
325 .pru_sockaddr = rts_sockaddr,
326 .pru_sosend = sosend,
327 .pru_soreceive = soreceive,
331 static __inline sa_family_t
332 familyof(struct sockaddr *sa)
334 return (sa != NULL ? sa->sa_family : 0);
338 * Routing socket input function. The packet must be serialized onto cpu 0.
339 * We use the cpu0_soport() netisr processing loop to handle it.
341 * This looks messy but it means that anyone, including interrupt code,
342 * can send a message to the routing socket.
345 rts_input_handler(struct netmsg *msg)
347 static const struct sockaddr route_dst = { 2, PF_ROUTE, };
348 struct sockproto route_proto;
349 struct netmsg_packet *pmsg;
355 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result;
356 route_proto.sp_family = PF_ROUTE;
357 route_proto.sp_protocol = family;
359 raw_input(m, &route_proto, &route_src, &route_dst);
363 rts_input(struct mbuf *m, sa_family_t family)
365 struct netmsg_packet *pmsg;
368 port = cpu0_soport(NULL, NULL, NULL, 0);
369 pmsg = &m->m_hdr.mh_netmsg;
370 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport,
371 0, rts_input_handler);
373 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family;
374 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg);
378 reallocbuf(void *ptr, size_t len, size_t olen)
382 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
385 bcopy(ptr, newptr, olen);
386 kfree(ptr, M_RTABLE);
391 * Internal helper routine for route_output().
394 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt,
395 struct rt_addrinfo *rtinfo)
398 struct rt_msghdr *rtm = *prtm;
400 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */
401 rtinfo->rti_dst = rt_key(rt);
402 rtinfo->rti_gateway = rt->rt_gateway;
403 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */
404 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */
405 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
406 if (rt->rt_ifp != NULL) {
407 rtinfo->rti_ifpaddr =
408 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
409 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
410 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
411 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
412 rtm->rtm_index = rt->rt_ifp->if_index;
414 rtinfo->rti_ifpaddr = NULL;
415 rtinfo->rti_ifaaddr = NULL;
419 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
420 if (rtm->rtm_msglen < msglen) {
421 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
426 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
428 rtm->rtm_flags = rt->rt_flags;
429 rtm->rtm_rmx = rt->rt_rmx;
430 rtm->rtm_addrs = rtinfo->rti_addrs;
435 static void route_output_add_callback(int, int, struct rt_addrinfo *,
436 struct rtentry *, void *);
437 static void route_output_delete_callback(int, int, struct rt_addrinfo *,
438 struct rtentry *, void *);
439 static void route_output_change_callback(int, int, struct rt_addrinfo *,
440 struct rtentry *, void *);
441 static void route_output_lock_callback(int, int, struct rt_addrinfo *,
442 struct rtentry *, void *);
446 route_output(struct mbuf *m, struct socket *so, ...)
448 struct rt_msghdr *rtm = NULL;
450 struct radix_node_head *rnh;
451 struct rawcb *rp = NULL;
452 struct pr_output_info *oi;
453 struct rt_addrinfo rtinfo;
458 oi = __va_arg(ap, struct pr_output_info *);
461 #define gotoerr(e) { error = e; goto flush;}
464 (m->m_len < sizeof(long) &&
465 (m = m_pullup(m, sizeof(long))) == NULL))
467 if (!(m->m_flags & M_PKTHDR))
468 panic("route_output");
469 len = m->m_pkthdr.len;
470 if (len < sizeof(struct rt_msghdr) ||
471 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
472 rtinfo.rti_dst = NULL;
475 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
477 rtinfo.rti_dst = NULL;
480 m_copydata(m, 0, len, (caddr_t)rtm);
481 if (rtm->rtm_version != RTM_VERSION) {
482 rtinfo.rti_dst = NULL;
483 gotoerr(EPROTONOSUPPORT);
485 rtm->rtm_pid = oi->p_pid;
486 bzero(&rtinfo, sizeof(struct rt_addrinfo));
487 rtinfo.rti_addrs = rtm->rtm_addrs;
488 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
489 rtinfo.rti_dst = NULL;
492 rtinfo.rti_flags = rtm->rtm_flags;
493 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
494 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
497 if (rtinfo.rti_genmask != NULL) {
498 struct radix_node *n;
500 #define clen(s) (*(u_char *)(s))
501 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
503 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
504 bcmp((char *)rtinfo.rti_genmask + 1,
505 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
506 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
512 * Verify that the caller has the appropriate privilege; RTM_GET
513 * is the only operation the non-superuser is allowed.
515 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0)
518 switch (rtm->rtm_type) {
520 if (rtinfo.rti_gateway == NULL) {
523 error = rtrequest1_global(RTM_ADD, &rtinfo,
524 route_output_add_callback, rtm);
529 * note: &rtm passed as argument so 'rtm' can be replaced.
531 error = rtrequest1_global(RTM_DELETE, &rtinfo,
532 route_output_delete_callback, &rtm);
535 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family];
537 error = EAFNOSUPPORT;
540 rt = (struct rtentry *)
541 rnh->rnh_lookup((char *)rtinfo.rti_dst,
542 (char *)rtinfo.rti_netmask, rnh);
548 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
553 error = rtrequest1_global(RTM_GET, &rtinfo,
554 route_output_change_callback, rtm);
557 error = rtrequest1_global(RTM_GET, &rtinfo,
558 route_output_lock_callback, rtm);
568 rtm->rtm_errno = error;
570 rtm->rtm_flags |= RTF_DONE;
574 * Check to see if we don't want our own messages.
576 if (!(so->so_options & SO_USELOOPBACK)) {
577 if (route_cb.any_count <= 1) {
579 kfree(rtm, M_RTABLE);
583 /* There is another listener, so construct message */
587 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
588 if (m->m_pkthdr.len < rtm->rtm_msglen) {
591 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
592 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
593 kfree(rtm, M_RTABLE);
596 rp->rcb_proto.sp_family = 0; /* Avoid us */
598 rts_input(m, familyof(rtinfo.rti_dst));
600 rp->rcb_proto.sp_family = PF_ROUTE;
605 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
606 struct rtentry *rt, void *arg)
608 struct rt_msghdr *rtm = arg;
610 if (error == 0 && rt != NULL) {
611 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
613 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
614 rt->rt_rmx.rmx_locks |=
615 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
616 rt->rt_genmask = rtinfo->rti_genmask;
621 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
622 struct rtentry *rt, void *arg)
624 struct rt_msghdr **rtm = arg;
626 if (error == 0 && rt) {
628 if (fillrtmsg(rtm, rt, rtinfo) != 0) {
630 /* XXX no way to return the error */
637 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
638 struct rtentry *rt, void *arg)
640 struct rt_msghdr *rtm = arg;
647 * new gateway could require new ifaddr, ifp;
648 * flags may also be different; ifp may be specified
649 * by ll sockaddr when protocol address is ambiguous
651 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
652 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL &&
653 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))
655 error = rt_getifa(rtinfo);
659 if (rtinfo->rti_gateway != NULL) {
660 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway);
664 if ((ifa = rtinfo->rti_ifa) != NULL) {
665 struct ifaddr *oifa = rt->rt_ifa;
668 if (oifa && oifa->ifa_rtrequest)
669 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo);
673 rt->rt_ifp = rtinfo->rti_ifp;
676 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx);
677 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
678 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo);
679 if (rtinfo->rti_genmask != NULL)
680 rt->rt_genmask = rtinfo->rti_genmask;
682 /* XXX no way to return error */
687 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
688 struct rtentry *rt, void *arg)
690 struct rt_msghdr *rtm = arg;
692 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
693 rt->rt_rmx.rmx_locks |=
694 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
698 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
700 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
701 setmetric(RTV_RPIPE, rmx_recvpipe);
702 setmetric(RTV_SPIPE, rmx_sendpipe);
703 setmetric(RTV_SSTHRESH, rmx_ssthresh);
704 setmetric(RTV_RTT, rmx_rtt);
705 setmetric(RTV_RTTVAR, rmx_rttvar);
706 setmetric(RTV_HOPCOUNT, rmx_hopcount);
707 setmetric(RTV_MTU, rmx_mtu);
708 setmetric(RTV_EXPIRE, rmx_expire);
713 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
716 * Extract the addresses of the passed sockaddrs.
717 * Do a little sanity checking so as to avoid bad memory references.
718 * This data is derived straight from userland.
721 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
726 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
727 if ((rtinfo->rti_addrs & (1 << i)) == 0)
729 sa = (struct sockaddr *)cp;
733 if ((cp + sa->sa_len) > cplim) {
738 * There are no more... Quit now.
739 * If there are more bits, they are in error.
740 * I've seen this. route(1) can evidently generate these.
741 * This causes kernel to core dump.
742 * For compatibility, if we see this, point to a safe address.
744 if (sa->sa_len == 0) {
745 static struct sockaddr sa_zero = {
746 sizeof sa_zero, AF_INET,
749 rtinfo->rti_info[i] = &sa_zero;
750 return (0); /* should be EINVAL but for compat */
753 /* Accept the sockaddr. */
754 rtinfo->rti_info[i] = sa;
755 cp += ROUNDUP(sa->sa_len);
761 rt_msghdrsize(int type)
766 return sizeof(struct ifa_msghdr);
769 return sizeof(struct ifma_msghdr);
771 return sizeof(struct if_msghdr);
774 return sizeof(struct if_announcemsghdr);
776 return sizeof(struct rt_msghdr);
781 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
785 len = rt_msghdrsize(type);
786 for (i = 0; i < RTAX_MAX; i++) {
787 if (rtinfo->rti_info[i] != NULL)
788 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
795 * Build a routing message in a buffer.
796 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
797 * to the end of the buffer after the message header.
799 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
800 * This side-effect can be avoided if we reorder the addrs bitmask field in all
801 * the route messages to line up so we can set it here instead of back in the
805 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
807 struct rt_msghdr *rtm;
811 rtm = (struct rt_msghdr *) buf;
812 rtm->rtm_version = RTM_VERSION;
813 rtm->rtm_type = type;
814 rtm->rtm_msglen = msglen;
816 cp = (char *)buf + rt_msghdrsize(type);
817 rtinfo->rti_addrs = 0;
818 for (i = 0; i < RTAX_MAX; i++) {
821 if ((sa = rtinfo->rti_info[i]) == NULL)
823 rtinfo->rti_addrs |= (1 << i);
824 dlen = ROUNDUP(sa->sa_len);
831 * Build a routing message in a mbuf chain.
832 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
833 * to the end of the mbuf after the message header.
835 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
836 * This side-effect can be avoided if we reorder the addrs bitmask field in all
837 * the route messages to line up so we can set it here instead of back in the
841 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
844 struct rt_msghdr *rtm;
848 hlen = rt_msghdrsize(type);
849 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
851 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
855 m->m_pkthdr.len = m->m_len = hlen;
856 m->m_pkthdr.rcvif = NULL;
857 rtinfo->rti_addrs = 0;
859 for (i = 0; i < RTAX_MAX; i++) {
863 if ((sa = rtinfo->rti_info[i]) == NULL)
865 rtinfo->rti_addrs |= (1 << i);
866 dlen = ROUNDUP(sa->sa_len);
867 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
870 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
874 rtm = mtod(m, struct rt_msghdr *);
876 rtm->rtm_msglen = len;
877 rtm->rtm_version = RTM_VERSION;
878 rtm->rtm_type = type;
883 * This routine is called to generate a message from the routing
884 * socket indicating that a redirect has occurred, a routing lookup
885 * has failed, or that a protocol has detected timeouts to a particular
889 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
891 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
892 struct rt_msghdr *rtm;
895 if (route_cb.any_count == 0)
897 m = rt_msg_mbuf(type, rtinfo);
900 rtm = mtod(m, struct rt_msghdr *);
901 rtm->rtm_flags = RTF_DONE | flags;
902 rtm->rtm_errno = error;
903 rtm->rtm_addrs = rtinfo->rti_addrs;
904 rts_input(m, familyof(dst));
908 rt_dstmsg(int type, struct sockaddr *dst, int error)
910 struct rt_msghdr *rtm;
911 struct rt_addrinfo addrs;
914 if (route_cb.any_count == 0)
916 bzero(&addrs, sizeof(struct rt_addrinfo));
917 addrs.rti_info[RTAX_DST] = dst;
918 m = rt_msg_mbuf(type, &addrs);
921 rtm = mtod(m, struct rt_msghdr *);
922 rtm->rtm_flags = RTF_DONE;
923 rtm->rtm_errno = error;
924 rtm->rtm_addrs = addrs.rti_addrs;
925 rts_input(m, familyof(dst));
929 * This routine is called to generate a message from the routing
930 * socket indicating that the status of a network interface has changed.
933 rt_ifmsg(struct ifnet *ifp)
935 struct if_msghdr *ifm;
937 struct rt_addrinfo rtinfo;
939 if (route_cb.any_count == 0)
941 bzero(&rtinfo, sizeof(struct rt_addrinfo));
942 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
945 ifm = mtod(m, struct if_msghdr *);
946 ifm->ifm_index = ifp->if_index;
947 ifm->ifm_flags = ifp->if_flags;
948 ifm->ifm_data = ifp->if_data;
954 rt_ifamsg(int cmd, struct ifaddr *ifa)
956 struct ifa_msghdr *ifam;
957 struct rt_addrinfo rtinfo;
959 struct ifnet *ifp = ifa->ifa_ifp;
961 bzero(&rtinfo, sizeof(struct rt_addrinfo));
962 rtinfo.rti_ifaaddr = ifa->ifa_addr;
963 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
964 rtinfo.rti_netmask = ifa->ifa_netmask;
965 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
967 m = rt_msg_mbuf(cmd, &rtinfo);
971 ifam = mtod(m, struct ifa_msghdr *);
972 ifam->ifam_index = ifp->if_index;
973 ifam->ifam_metric = ifa->ifa_metric;
974 ifam->ifam_flags = ifa->ifa_flags;
975 ifam->ifam_addrs = rtinfo.rti_addrs;
977 rts_input(m, familyof(ifa->ifa_addr));
981 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
983 struct rt_msghdr *rtm;
984 struct rt_addrinfo rtinfo;
986 struct sockaddr *dst;
991 bzero(&rtinfo, sizeof(struct rt_addrinfo));
992 rtinfo.rti_dst = dst = rt_key(rt);
993 rtinfo.rti_gateway = rt->rt_gateway;
994 rtinfo.rti_netmask = rt_mask(rt);
996 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
997 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
999 m = rt_msg_mbuf(cmd, &rtinfo);
1003 rtm = mtod(m, struct rt_msghdr *);
1005 rtm->rtm_index = ifp->if_index;
1006 rtm->rtm_flags |= rt->rt_flags;
1007 rtm->rtm_errno = error;
1008 rtm->rtm_addrs = rtinfo.rti_addrs;
1010 rts_input(m, familyof(dst));
1014 * This is called to generate messages from the routing socket
1015 * indicating a network interface has had addresses associated with it.
1016 * if we ever reverse the logic and replace messages TO the routing
1017 * socket indicate a request to configure interfaces, then it will
1018 * be unnecessary as the routing socket will automatically generate
1022 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1026 * notify the SCTP stack
1027 * this will only get called when an address is added/deleted
1028 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1031 sctp_add_ip_address(ifa);
1032 else if (cmd == RTM_DELETE)
1033 sctp_delete_ip_address(ifa);
1036 if (route_cb.any_count == 0)
1039 if (cmd == RTM_ADD) {
1040 rt_ifamsg(RTM_NEWADDR, ifa);
1041 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
1043 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
1044 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
1045 rt_ifamsg(RTM_DELADDR, ifa);
1050 * This is the analogue to the rt_newaddrmsg which performs the same
1051 * function but for multicast group memberhips. This is easier since
1052 * there is no route state to worry about.
1055 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1057 struct rt_addrinfo rtinfo;
1058 struct mbuf *m = NULL;
1059 struct ifnet *ifp = ifma->ifma_ifp;
1060 struct ifma_msghdr *ifmam;
1062 if (route_cb.any_count == 0)
1065 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1066 rtinfo.rti_ifaaddr = ifma->ifma_addr;
1067 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrhead))
1068 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
1070 * If a link-layer address is present, present it as a ``gateway''
1071 * (similarly to how ARP entries, e.g., are presented).
1073 rtinfo.rti_gateway = ifma->ifma_lladdr;
1075 m = rt_msg_mbuf(cmd, &rtinfo);
1079 ifmam = mtod(m, struct ifma_msghdr *);
1080 ifmam->ifmam_index = ifp->if_index;
1081 ifmam->ifmam_addrs = rtinfo.rti_addrs;
1083 rts_input(m, familyof(ifma->ifma_addr));
1086 static struct mbuf *
1087 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1088 struct rt_addrinfo *info)
1090 struct if_announcemsghdr *ifan;
1093 if (route_cb.any_count == 0)
1096 bzero(info, sizeof(*info));
1097 m = rt_msg_mbuf(type, info);
1101 ifan = mtod(m, struct if_announcemsghdr *);
1102 ifan->ifan_index = ifp->if_index;
1103 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1104 ifan->ifan_what = what;
1109 * This is called to generate routing socket messages indicating
1110 * IEEE80211 wireless events.
1111 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1114 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1116 struct rt_addrinfo info;
1119 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1124 * Append the ieee80211 data. Try to stick it in the
1125 * mbuf containing the ifannounce msg; otherwise allocate
1126 * a new mbuf and append.
1128 * NB: we assume m is a single mbuf.
1130 if (data_len > M_TRAILINGSPACE(m)) {
1131 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA);
1136 bcopy(data, mtod(n, void *), data_len);
1137 n->m_len = data_len;
1139 } else if (data_len > 0) {
1140 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1141 m->m_len += data_len;
1144 if (m->m_flags & M_PKTHDR)
1145 m->m_pkthdr.len += data_len;
1146 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1151 * This is called to generate routing socket messages indicating
1152 * network interface arrival and departure.
1155 rt_ifannouncemsg(struct ifnet *ifp, int what)
1157 struct rt_addrinfo addrinfo;
1160 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo);
1166 resizewalkarg(struct walkarg *w, int len)
1170 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1173 if (w->w_tmem != NULL)
1174 kfree(w->w_tmem, M_RTABLE);
1176 w->w_tmemsize = len;
1181 * This is used in dumping the kernel table via sysctl().
1184 sysctl_dumpentry(struct radix_node *rn, void *vw)
1186 struct walkarg *w = vw;
1187 struct rtentry *rt = (struct rtentry *)rn;
1188 struct rt_addrinfo rtinfo;
1191 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1194 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1195 rtinfo.rti_dst = rt_key(rt);
1196 rtinfo.rti_gateway = rt->rt_gateway;
1197 rtinfo.rti_netmask = rt_mask(rt);
1198 rtinfo.rti_genmask = rt->rt_genmask;
1199 if (rt->rt_ifp != NULL) {
1200 rtinfo.rti_ifpaddr =
1201 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
1202 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1203 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1204 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1206 msglen = rt_msgsize(RTM_GET, &rtinfo);
1207 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1209 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1210 if (w->w_req != NULL) {
1211 struct rt_msghdr *rtm = w->w_tmem;
1213 rtm->rtm_flags = rt->rt_flags;
1214 rtm->rtm_use = rt->rt_use;
1215 rtm->rtm_rmx = rt->rt_rmx;
1216 rtm->rtm_index = rt->rt_ifp->if_index;
1217 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1218 rtm->rtm_addrs = rtinfo.rti_addrs;
1219 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1226 sysctl_iflist(int af, struct walkarg *w)
1230 struct rt_addrinfo rtinfo;
1233 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1234 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1235 if (w->w_arg && w->w_arg != ifp->if_index)
1237 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1238 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1239 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1240 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1242 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1243 rtinfo.rti_ifpaddr = NULL;
1244 if (w->w_req != NULL && w->w_tmem != NULL) {
1245 struct if_msghdr *ifm = w->w_tmem;
1247 ifm->ifm_index = ifp->if_index;
1248 ifm->ifm_flags = ifp->if_flags;
1249 ifm->ifm_data = ifp->if_data;
1250 ifm->ifm_addrs = rtinfo.rti_addrs;
1251 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1255 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1256 if (af && af != ifa->ifa_addr->sa_family)
1258 if (curproc->p_ucred->cr_prison &&
1259 prison_if(curproc->p_ucred, ifa->ifa_addr))
1261 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1262 rtinfo.rti_netmask = ifa->ifa_netmask;
1263 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1264 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1265 if (w->w_tmemsize < msglen &&
1266 resizewalkarg(w, msglen) != 0)
1268 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1269 if (w->w_req != NULL) {
1270 struct ifa_msghdr *ifam = w->w_tmem;
1272 ifam->ifam_index = ifa->ifa_ifp->if_index;
1273 ifam->ifam_flags = ifa->ifa_flags;
1274 ifam->ifam_metric = ifa->ifa_metric;
1275 ifam->ifam_addrs = rtinfo.rti_addrs;
1276 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1281 rtinfo.rti_netmask = NULL;
1282 rtinfo.rti_ifaaddr = NULL;
1283 rtinfo.rti_bcastaddr = NULL;
1289 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1291 int *name = (int *)arg1;
1292 u_int namelen = arg2;
1293 struct radix_node_head *rnh;
1294 int i, error = EINVAL;
1303 if (namelen != 3 && namelen != 4)
1306 bzero(&w, sizeof w);
1312 * Optional third argument specifies cpu, used primarily for
1313 * debugging the route table.
1316 if (name[3] < 0 || name[3] >= ncpus)
1319 lwkt_migratecpu(name[3]);
1327 for (i = 1; i <= AF_MAX; i++)
1328 if ((rnh = rt_tables[mycpuid][i]) &&
1329 (af == 0 || af == i) &&
1330 (error = rnh->rnh_walktree(rnh,
1331 sysctl_dumpentry, &w)))
1336 error = sysctl_iflist(af, &w);
1339 if (w.w_tmem != NULL)
1340 kfree(w.w_tmem, M_RTABLE);
1342 lwkt_migratecpu(origcpu);
1346 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1349 * Definitions of protocols supported in the ROUTE domain.
1352 static struct domain routedomain; /* or at least forward */
1354 static struct protosw routesw[] = {
1355 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1356 0, route_output, raw_ctlinput, 0,
1363 static struct domain routedomain = {
1364 PF_ROUTE, "route", NULL, NULL, NULL,
1365 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],