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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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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55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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 1.45 2008/10/27 02:56:30 sephe 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_addrheads[mycpuid])
410 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
411 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
412 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
413 rtm->rtm_index = rt->rt_ifp->if_index;
415 rtinfo->rti_ifpaddr = NULL;
416 rtinfo->rti_ifaaddr = NULL;
420 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
421 if (rtm->rtm_msglen < msglen) {
422 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
427 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
429 rtm->rtm_flags = rt->rt_flags;
430 rtm->rtm_rmx = rt->rt_rmx;
431 rtm->rtm_addrs = rtinfo->rti_addrs;
436 static void route_output_add_callback(int, int, struct rt_addrinfo *,
437 struct rtentry *, void *);
438 static void route_output_delete_callback(int, int, struct rt_addrinfo *,
439 struct rtentry *, void *);
440 static void route_output_change_callback(int, int, struct rt_addrinfo *,
441 struct rtentry *, void *);
442 static void route_output_lock_callback(int, int, struct rt_addrinfo *,
443 struct rtentry *, void *);
447 route_output(struct mbuf *m, struct socket *so, ...)
449 struct rt_msghdr *rtm = NULL;
451 struct radix_node_head *rnh;
452 struct rawcb *rp = NULL;
453 struct pr_output_info *oi;
454 struct rt_addrinfo rtinfo;
459 oi = __va_arg(ap, struct pr_output_info *);
462 #define gotoerr(e) { error = e; goto flush;}
465 (m->m_len < sizeof(long) &&
466 (m = m_pullup(m, sizeof(long))) == NULL))
468 if (!(m->m_flags & M_PKTHDR))
469 panic("route_output");
470 len = m->m_pkthdr.len;
471 if (len < sizeof(struct rt_msghdr) ||
472 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
473 rtinfo.rti_dst = NULL;
476 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
478 rtinfo.rti_dst = NULL;
481 m_copydata(m, 0, len, (caddr_t)rtm);
482 if (rtm->rtm_version != RTM_VERSION) {
483 rtinfo.rti_dst = NULL;
484 gotoerr(EPROTONOSUPPORT);
486 rtm->rtm_pid = oi->p_pid;
487 bzero(&rtinfo, sizeof(struct rt_addrinfo));
488 rtinfo.rti_addrs = rtm->rtm_addrs;
489 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
490 rtinfo.rti_dst = NULL;
493 rtinfo.rti_flags = rtm->rtm_flags;
494 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
495 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
498 if (rtinfo.rti_genmask != NULL) {
499 struct radix_node *n;
501 #define clen(s) (*(u_char *)(s))
502 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
504 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
505 bcmp((char *)rtinfo.rti_genmask + 1,
506 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
507 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
513 * Verify that the caller has the appropriate privilege; RTM_GET
514 * is the only operation the non-superuser is allowed.
516 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0)
519 switch (rtm->rtm_type) {
521 if (rtinfo.rti_gateway == NULL) {
524 error = rtrequest1_global(RTM_ADD, &rtinfo,
525 route_output_add_callback, rtm);
530 * note: &rtm passed as argument so 'rtm' can be replaced.
532 error = rtrequest1_global(RTM_DELETE, &rtinfo,
533 route_output_delete_callback, &rtm);
536 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family];
538 error = EAFNOSUPPORT;
541 rt = (struct rtentry *)
542 rnh->rnh_lookup((char *)rtinfo.rti_dst,
543 (char *)rtinfo.rti_netmask, rnh);
549 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
554 error = rtrequest1_global(RTM_GET, &rtinfo,
555 route_output_change_callback, rtm);
558 error = rtrequest1_global(RTM_GET, &rtinfo,
559 route_output_lock_callback, rtm);
569 rtm->rtm_errno = error;
571 rtm->rtm_flags |= RTF_DONE;
575 * Check to see if we don't want our own messages.
577 if (!(so->so_options & SO_USELOOPBACK)) {
578 if (route_cb.any_count <= 1) {
580 kfree(rtm, M_RTABLE);
584 /* There is another listener, so construct message */
588 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
589 if (m->m_pkthdr.len < rtm->rtm_msglen) {
592 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
593 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
594 kfree(rtm, M_RTABLE);
597 rp->rcb_proto.sp_family = 0; /* Avoid us */
599 rts_input(m, familyof(rtinfo.rti_dst));
601 rp->rcb_proto.sp_family = PF_ROUTE;
606 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
607 struct rtentry *rt, void *arg)
609 struct rt_msghdr *rtm = arg;
611 if (error == 0 && rt != NULL) {
612 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
614 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
615 rt->rt_rmx.rmx_locks |=
616 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
617 rt->rt_genmask = rtinfo->rti_genmask;
622 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
623 struct rtentry *rt, void *arg)
625 struct rt_msghdr **rtm = arg;
627 if (error == 0 && rt) {
629 if (fillrtmsg(rtm, rt, rtinfo) != 0) {
631 /* XXX no way to return the error */
638 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
639 struct rtentry *rt, void *arg)
641 struct rt_msghdr *rtm = arg;
648 * new gateway could require new ifaddr, ifp;
649 * flags may also be different; ifp may be specified
650 * by ll sockaddr when protocol address is ambiguous
652 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
653 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL &&
654 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))
656 error = rt_getifa(rtinfo);
660 if (rtinfo->rti_gateway != NULL) {
661 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway);
665 if ((ifa = rtinfo->rti_ifa) != NULL) {
666 struct ifaddr *oifa = rt->rt_ifa;
669 if (oifa && oifa->ifa_rtrequest)
670 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo);
674 rt->rt_ifp = rtinfo->rti_ifp;
677 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx);
678 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
679 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo);
680 if (rtinfo->rti_genmask != NULL)
681 rt->rt_genmask = rtinfo->rti_genmask;
683 /* XXX no way to return error */
688 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
689 struct rtentry *rt, void *arg)
691 struct rt_msghdr *rtm = arg;
693 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
694 rt->rt_rmx.rmx_locks |=
695 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
699 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
701 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
702 setmetric(RTV_RPIPE, rmx_recvpipe);
703 setmetric(RTV_SPIPE, rmx_sendpipe);
704 setmetric(RTV_SSTHRESH, rmx_ssthresh);
705 setmetric(RTV_RTT, rmx_rtt);
706 setmetric(RTV_RTTVAR, rmx_rttvar);
707 setmetric(RTV_HOPCOUNT, rmx_hopcount);
708 setmetric(RTV_MTU, rmx_mtu);
709 setmetric(RTV_EXPIRE, rmx_expire);
714 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
717 * Extract the addresses of the passed sockaddrs.
718 * Do a little sanity checking so as to avoid bad memory references.
719 * This data is derived straight from userland.
722 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
727 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
728 if ((rtinfo->rti_addrs & (1 << i)) == 0)
730 sa = (struct sockaddr *)cp;
734 if ((cp + sa->sa_len) > cplim) {
739 * There are no more... Quit now.
740 * If there are more bits, they are in error.
741 * I've seen this. route(1) can evidently generate these.
742 * This causes kernel to core dump.
743 * For compatibility, if we see this, point to a safe address.
745 if (sa->sa_len == 0) {
746 static struct sockaddr sa_zero = {
747 sizeof sa_zero, AF_INET,
750 rtinfo->rti_info[i] = &sa_zero;
751 kprintf("rtsock: received more addr bits than sockaddrs.\n");
752 return (0); /* should be EINVAL but for compat */
755 /* Accept the sockaddr. */
756 rtinfo->rti_info[i] = sa;
757 cp += ROUNDUP(sa->sa_len);
763 rt_msghdrsize(int type)
768 return sizeof(struct ifa_msghdr);
771 return sizeof(struct ifma_msghdr);
773 return sizeof(struct if_msghdr);
776 return sizeof(struct if_announcemsghdr);
778 return sizeof(struct rt_msghdr);
783 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
787 len = rt_msghdrsize(type);
788 for (i = 0; i < RTAX_MAX; i++) {
789 if (rtinfo->rti_info[i] != NULL)
790 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
797 * Build a routing message in a buffer.
798 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
799 * to the end of the buffer after the message header.
801 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
802 * This side-effect can be avoided if we reorder the addrs bitmask field in all
803 * the route messages to line up so we can set it here instead of back in the
807 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
809 struct rt_msghdr *rtm;
813 rtm = (struct rt_msghdr *) buf;
814 rtm->rtm_version = RTM_VERSION;
815 rtm->rtm_type = type;
816 rtm->rtm_msglen = msglen;
818 cp = (char *)buf + rt_msghdrsize(type);
819 rtinfo->rti_addrs = 0;
820 for (i = 0; i < RTAX_MAX; i++) {
823 if ((sa = rtinfo->rti_info[i]) == NULL)
825 rtinfo->rti_addrs |= (1 << i);
826 dlen = ROUNDUP(sa->sa_len);
833 * Build a routing message in a mbuf chain.
834 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
835 * to the end of the mbuf after the message header.
837 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
838 * This side-effect can be avoided if we reorder the addrs bitmask field in all
839 * the route messages to line up so we can set it here instead of back in the
843 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
846 struct rt_msghdr *rtm;
850 hlen = rt_msghdrsize(type);
851 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
853 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
857 m->m_pkthdr.len = m->m_len = hlen;
858 m->m_pkthdr.rcvif = NULL;
859 rtinfo->rti_addrs = 0;
861 for (i = 0; i < RTAX_MAX; i++) {
865 if ((sa = rtinfo->rti_info[i]) == NULL)
867 rtinfo->rti_addrs |= (1 << i);
868 dlen = ROUNDUP(sa->sa_len);
869 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
872 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
876 rtm = mtod(m, struct rt_msghdr *);
878 rtm->rtm_msglen = len;
879 rtm->rtm_version = RTM_VERSION;
880 rtm->rtm_type = type;
885 * This routine is called to generate a message from the routing
886 * socket indicating that a redirect has occurred, a routing lookup
887 * has failed, or that a protocol has detected timeouts to a particular
891 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
893 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
894 struct rt_msghdr *rtm;
897 if (route_cb.any_count == 0)
899 m = rt_msg_mbuf(type, rtinfo);
902 rtm = mtod(m, struct rt_msghdr *);
903 rtm->rtm_flags = RTF_DONE | flags;
904 rtm->rtm_errno = error;
905 rtm->rtm_addrs = rtinfo->rti_addrs;
906 rts_input(m, familyof(dst));
910 rt_dstmsg(int type, struct sockaddr *dst, int error)
912 struct rt_msghdr *rtm;
913 struct rt_addrinfo addrs;
916 if (route_cb.any_count == 0)
918 bzero(&addrs, sizeof(struct rt_addrinfo));
919 addrs.rti_info[RTAX_DST] = dst;
920 m = rt_msg_mbuf(type, &addrs);
923 rtm = mtod(m, struct rt_msghdr *);
924 rtm->rtm_flags = RTF_DONE;
925 rtm->rtm_errno = error;
926 rtm->rtm_addrs = addrs.rti_addrs;
927 rts_input(m, familyof(dst));
931 * This routine is called to generate a message from the routing
932 * socket indicating that the status of a network interface has changed.
935 rt_ifmsg(struct ifnet *ifp)
937 struct if_msghdr *ifm;
939 struct rt_addrinfo rtinfo;
941 if (route_cb.any_count == 0)
943 bzero(&rtinfo, sizeof(struct rt_addrinfo));
944 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
947 ifm = mtod(m, struct if_msghdr *);
948 ifm->ifm_index = ifp->if_index;
949 ifm->ifm_flags = ifp->if_flags;
950 ifm->ifm_data = ifp->if_data;
956 rt_ifamsg(int cmd, struct ifaddr *ifa)
958 struct ifa_msghdr *ifam;
959 struct rt_addrinfo rtinfo;
961 struct ifnet *ifp = ifa->ifa_ifp;
963 bzero(&rtinfo, sizeof(struct rt_addrinfo));
964 rtinfo.rti_ifaaddr = ifa->ifa_addr;
966 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
967 rtinfo.rti_netmask = ifa->ifa_netmask;
968 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
970 m = rt_msg_mbuf(cmd, &rtinfo);
974 ifam = mtod(m, struct ifa_msghdr *);
975 ifam->ifam_index = ifp->if_index;
976 ifam->ifam_metric = ifa->ifa_metric;
977 ifam->ifam_flags = ifa->ifa_flags;
978 ifam->ifam_addrs = rtinfo.rti_addrs;
980 rts_input(m, familyof(ifa->ifa_addr));
984 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
986 struct rt_msghdr *rtm;
987 struct rt_addrinfo rtinfo;
989 struct sockaddr *dst;
994 bzero(&rtinfo, sizeof(struct rt_addrinfo));
995 rtinfo.rti_dst = dst = rt_key(rt);
996 rtinfo.rti_gateway = rt->rt_gateway;
997 rtinfo.rti_netmask = rt_mask(rt);
1000 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1002 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1004 m = rt_msg_mbuf(cmd, &rtinfo);
1008 rtm = mtod(m, struct rt_msghdr *);
1010 rtm->rtm_index = ifp->if_index;
1011 rtm->rtm_flags |= rt->rt_flags;
1012 rtm->rtm_errno = error;
1013 rtm->rtm_addrs = rtinfo.rti_addrs;
1015 rts_input(m, familyof(dst));
1019 * This is called to generate messages from the routing socket
1020 * indicating a network interface has had addresses associated with it.
1021 * if we ever reverse the logic and replace messages TO the routing
1022 * socket indicate a request to configure interfaces, then it will
1023 * be unnecessary as the routing socket will automatically generate
1027 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1031 * notify the SCTP stack
1032 * this will only get called when an address is added/deleted
1033 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1036 sctp_add_ip_address(ifa);
1037 else if (cmd == RTM_DELETE)
1038 sctp_delete_ip_address(ifa);
1041 if (route_cb.any_count == 0)
1044 if (cmd == RTM_ADD) {
1045 rt_ifamsg(RTM_NEWADDR, ifa);
1046 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
1048 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
1049 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
1050 rt_ifamsg(RTM_DELADDR, ifa);
1055 * This is the analogue to the rt_newaddrmsg which performs the same
1056 * function but for multicast group memberhips. This is easier since
1057 * there is no route state to worry about.
1060 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1062 struct rt_addrinfo rtinfo;
1063 struct mbuf *m = NULL;
1064 struct ifnet *ifp = ifma->ifma_ifp;
1065 struct ifma_msghdr *ifmam;
1067 if (route_cb.any_count == 0)
1070 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1071 rtinfo.rti_ifaaddr = ifma->ifma_addr;
1072 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
1073 rtinfo.rti_ifpaddr =
1074 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1077 * If a link-layer address is present, present it as a ``gateway''
1078 * (similarly to how ARP entries, e.g., are presented).
1080 rtinfo.rti_gateway = ifma->ifma_lladdr;
1082 m = rt_msg_mbuf(cmd, &rtinfo);
1086 ifmam = mtod(m, struct ifma_msghdr *);
1087 ifmam->ifmam_index = ifp->if_index;
1088 ifmam->ifmam_addrs = rtinfo.rti_addrs;
1090 rts_input(m, familyof(ifma->ifma_addr));
1093 static struct mbuf *
1094 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1095 struct rt_addrinfo *info)
1097 struct if_announcemsghdr *ifan;
1100 if (route_cb.any_count == 0)
1103 bzero(info, sizeof(*info));
1104 m = rt_msg_mbuf(type, info);
1108 ifan = mtod(m, struct if_announcemsghdr *);
1109 ifan->ifan_index = ifp->if_index;
1110 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1111 ifan->ifan_what = what;
1116 * This is called to generate routing socket messages indicating
1117 * IEEE80211 wireless events.
1118 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1121 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1123 struct rt_addrinfo info;
1126 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1131 * Append the ieee80211 data. Try to stick it in the
1132 * mbuf containing the ifannounce msg; otherwise allocate
1133 * a new mbuf and append.
1135 * NB: we assume m is a single mbuf.
1137 if (data_len > M_TRAILINGSPACE(m)) {
1138 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA);
1143 bcopy(data, mtod(n, void *), data_len);
1144 n->m_len = data_len;
1146 } else if (data_len > 0) {
1147 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1148 m->m_len += data_len;
1151 if (m->m_flags & M_PKTHDR)
1152 m->m_pkthdr.len += data_len;
1153 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1158 * This is called to generate routing socket messages indicating
1159 * network interface arrival and departure.
1162 rt_ifannouncemsg(struct ifnet *ifp, int what)
1164 struct rt_addrinfo addrinfo;
1167 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo);
1173 resizewalkarg(struct walkarg *w, int len)
1177 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1180 if (w->w_tmem != NULL)
1181 kfree(w->w_tmem, M_RTABLE);
1183 w->w_tmemsize = len;
1188 * This is used in dumping the kernel table via sysctl().
1191 sysctl_dumpentry(struct radix_node *rn, void *vw)
1193 struct walkarg *w = vw;
1194 struct rtentry *rt = (struct rtentry *)rn;
1195 struct rt_addrinfo rtinfo;
1198 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1201 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1202 rtinfo.rti_dst = rt_key(rt);
1203 rtinfo.rti_gateway = rt->rt_gateway;
1204 rtinfo.rti_netmask = rt_mask(rt);
1205 rtinfo.rti_genmask = rt->rt_genmask;
1206 if (rt->rt_ifp != NULL) {
1207 rtinfo.rti_ifpaddr =
1208 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1209 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1210 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1211 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1213 msglen = rt_msgsize(RTM_GET, &rtinfo);
1214 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1216 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1217 if (w->w_req != NULL) {
1218 struct rt_msghdr *rtm = w->w_tmem;
1220 rtm->rtm_flags = rt->rt_flags;
1221 rtm->rtm_use = rt->rt_use;
1222 rtm->rtm_rmx = rt->rt_rmx;
1223 rtm->rtm_index = rt->rt_ifp->if_index;
1224 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1225 rtm->rtm_addrs = rtinfo.rti_addrs;
1226 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1233 sysctl_iflist(int af, struct walkarg *w)
1236 struct rt_addrinfo rtinfo;
1239 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1240 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1241 struct ifaddr_container *ifac;
1244 if (w->w_arg && w->w_arg != ifp->if_index)
1246 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]);
1248 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1249 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1250 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1252 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1253 rtinfo.rti_ifpaddr = NULL;
1254 if (w->w_req != NULL && w->w_tmem != NULL) {
1255 struct if_msghdr *ifm = w->w_tmem;
1257 ifm->ifm_index = ifp->if_index;
1258 ifm->ifm_flags = ifp->if_flags;
1259 ifm->ifm_data = ifp->if_data;
1260 ifm->ifm_addrs = rtinfo.rti_addrs;
1261 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1265 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) {
1268 if (af && af != ifa->ifa_addr->sa_family)
1270 if (curproc->p_ucred->cr_prison &&
1271 prison_if(curproc->p_ucred, ifa->ifa_addr))
1273 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1274 rtinfo.rti_netmask = ifa->ifa_netmask;
1275 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1276 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1277 if (w->w_tmemsize < msglen &&
1278 resizewalkarg(w, msglen) != 0)
1280 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1281 if (w->w_req != NULL) {
1282 struct ifa_msghdr *ifam = w->w_tmem;
1284 ifam->ifam_index = ifa->ifa_ifp->if_index;
1285 ifam->ifam_flags = ifa->ifa_flags;
1286 ifam->ifam_metric = ifa->ifa_metric;
1287 ifam->ifam_addrs = rtinfo.rti_addrs;
1288 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1293 rtinfo.rti_netmask = NULL;
1294 rtinfo.rti_ifaaddr = NULL;
1295 rtinfo.rti_bcastaddr = NULL;
1301 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1303 int *name = (int *)arg1;
1304 u_int namelen = arg2;
1305 struct radix_node_head *rnh;
1306 int i, error = EINVAL;
1315 if (namelen != 3 && namelen != 4)
1318 bzero(&w, sizeof w);
1324 * Optional third argument specifies cpu, used primarily for
1325 * debugging the route table.
1328 if (name[3] < 0 || name[3] >= ncpus)
1331 lwkt_migratecpu(name[3]);
1339 for (i = 1; i <= AF_MAX; i++)
1340 if ((rnh = rt_tables[mycpuid][i]) &&
1341 (af == 0 || af == i) &&
1342 (error = rnh->rnh_walktree(rnh,
1343 sysctl_dumpentry, &w)))
1348 error = sysctl_iflist(af, &w);
1351 if (w.w_tmem != NULL)
1352 kfree(w.w_tmem, M_RTABLE);
1354 lwkt_migratecpu(origcpu);
1358 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1361 * Definitions of protocols supported in the ROUTE domain.
1364 static struct domain routedomain; /* or at least forward */
1366 static struct protosw routesw[] = {
1367 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1368 0, route_output, raw_ctlinput, 0,
1369 cpu0_soport, cpu0_ctlport,
1375 static struct domain routedomain = {
1376 PF_ROUTE, "route", NULL, NULL, NULL,
1377 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],