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
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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>
78 #include <sys/malloc.h>
80 #include <sys/protosw.h>
81 #include <sys/socket.h>
82 #include <sys/socketvar.h>
83 #include <sys/domain.h>
84 #include <sys/thread2.h>
87 #include <net/route.h>
88 #include <net/raw_cb.h>
89 #include <net/netmsg2.h>
92 extern void sctp_add_ip_address(struct ifaddr *ifa);
93 extern void sctp_delete_ip_address(struct ifaddr *ifa);
96 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
98 static struct route_cb {
106 static const struct sockaddr route_src = { 2, PF_ROUTE, };
112 struct sysctl_req *w_req;
116 rt_msg_mbuf (int, struct rt_addrinfo *);
117 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len);
118 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo);
119 static int rt_xaddrs (char *, char *, struct rt_addrinfo *);
120 static int sysctl_dumpentry (struct radix_node *rn, void *vw);
121 static int sysctl_iflist (int af, struct walkarg *w);
122 static int route_output(struct mbuf *, struct socket *, ...);
123 static void rt_setmetrics (u_long, struct rt_metrics *,
124 struct rt_metrics *);
127 * It really doesn't make any sense at all for this code to share much
128 * with raw_usrreq.c, since its functionality is so restricted. XXX
131 rts_abort(struct socket *so)
136 error = raw_usrreqs.pru_abort(so);
141 /* pru_accept is EOPNOTSUPP */
144 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai)
149 if (sotorawcb(so) != NULL)
150 return EISCONN; /* XXX panic? */
152 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
155 * The critical section is necessary to block protocols from sending
156 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
157 * this PCB is extant but incompletely initialized.
158 * Probably we should try to do more of this work beforehand and
159 * eliminate the critical section.
163 error = raw_attach(so, proto, ai->sb_rlimit);
170 switch(rp->rcb_proto.sp_protocol) {
175 route_cb.ip6_count++;
178 route_cb.ipx_count++;
184 rp->rcb_faddr = &route_src;
185 route_cb.any_count++;
187 so->so_options |= SO_USELOOPBACK;
193 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
198 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
204 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
209 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
214 /* pru_connect2 is EOPNOTSUPP */
215 /* pru_control is EOPNOTSUPP */
218 rts_detach(struct socket *so)
220 struct rawcb *rp = sotorawcb(so);
225 switch(rp->rcb_proto.sp_protocol) {
230 route_cb.ip6_count--;
233 route_cb.ipx_count--;
239 route_cb.any_count--;
241 error = raw_usrreqs.pru_detach(so);
247 rts_disconnect(struct socket *so)
252 error = raw_usrreqs.pru_disconnect(so);
257 /* pru_listen is EOPNOTSUPP */
260 rts_peeraddr(struct socket *so, struct sockaddr **nam)
265 error = raw_usrreqs.pru_peeraddr(so, nam);
270 /* pru_rcvd is EOPNOTSUPP */
271 /* pru_rcvoob is EOPNOTSUPP */
274 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
275 struct mbuf *control, struct thread *td)
280 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
285 /* pru_sense is null */
288 rts_shutdown(struct socket *so)
293 error = raw_usrreqs.pru_shutdown(so);
299 rts_sockaddr(struct socket *so, struct sockaddr **nam)
304 error = raw_usrreqs.pru_sockaddr(so, nam);
309 static struct pr_usrreqs route_usrreqs = {
310 .pru_abort = rts_abort,
311 .pru_accept = pru_accept_notsupp,
312 .pru_attach = rts_attach,
313 .pru_bind = rts_bind,
314 .pru_connect = rts_connect,
315 .pru_connect2 = pru_connect2_notsupp,
316 .pru_control = pru_control_notsupp,
317 .pru_detach = rts_detach,
318 .pru_disconnect = rts_disconnect,
319 .pru_listen = pru_listen_notsupp,
320 .pru_peeraddr = rts_peeraddr,
321 .pru_rcvd = pru_rcvd_notsupp,
322 .pru_rcvoob = pru_rcvoob_notsupp,
323 .pru_send = rts_send,
324 .pru_sense = pru_sense_null,
325 .pru_shutdown = rts_shutdown,
326 .pru_sockaddr = rts_sockaddr,
327 .pru_sosend = sosend,
328 .pru_soreceive = soreceive,
332 static __inline sa_family_t
333 familyof(struct sockaddr *sa)
335 return (sa != NULL ? sa->sa_family : 0);
339 * Routing socket input function. The packet must be serialized onto cpu 0.
340 * We use the cpu0_soport() netisr processing loop to handle it.
342 * This looks messy but it means that anyone, including interrupt code,
343 * can send a message to the routing socket.
346 rts_input_handler(struct netmsg *msg)
348 static const struct sockaddr route_dst = { 2, PF_ROUTE, };
349 struct sockproto route_proto;
350 struct netmsg_packet *pmsg;
356 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result;
357 route_proto.sp_family = PF_ROUTE;
358 route_proto.sp_protocol = family;
363 skip = m->m_pkthdr.header;
364 m->m_pkthdr.header = NULL;
366 raw_input(m, &route_proto, &route_src, &route_dst, skip);
370 rts_input_skip(struct mbuf *m, sa_family_t family, struct rawcb *skip)
372 struct netmsg_packet *pmsg;
377 port = cpu0_soport(NULL, NULL, NULL, 0);
378 pmsg = &m->m_hdr.mh_netmsg;
379 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport,
380 0, rts_input_handler);
382 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family;
383 m->m_pkthdr.header = skip; /* XXX steal field in pkthdr */
384 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg);
388 rts_input(struct mbuf *m, sa_family_t family)
390 rts_input_skip(m, family, NULL);
394 reallocbuf(void *ptr, size_t len, size_t olen)
398 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
401 bcopy(ptr, newptr, olen);
402 kfree(ptr, M_RTABLE);
407 * Internal helper routine for route_output().
410 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt,
411 struct rt_addrinfo *rtinfo)
414 struct rt_msghdr *rtm = *prtm;
416 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */
417 rtinfo->rti_dst = rt_key(rt);
418 rtinfo->rti_gateway = rt->rt_gateway;
419 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */
420 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */
421 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
422 if (rt->rt_ifp != NULL) {
423 rtinfo->rti_ifpaddr =
424 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])
426 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
427 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
428 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
429 rtm->rtm_index = rt->rt_ifp->if_index;
431 rtinfo->rti_ifpaddr = NULL;
432 rtinfo->rti_ifaaddr = NULL;
434 } else if (rt->rt_ifp != NULL) {
435 rtm->rtm_index = rt->rt_ifp->if_index;
438 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
439 if (rtm->rtm_msglen < msglen) {
440 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
445 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
447 rtm->rtm_flags = rt->rt_flags;
448 rtm->rtm_rmx = rt->rt_rmx;
449 rtm->rtm_addrs = rtinfo->rti_addrs;
454 static void route_output_add_callback(int, int, struct rt_addrinfo *,
455 struct rtentry *, void *);
456 static void route_output_delete_callback(int, int, struct rt_addrinfo *,
457 struct rtentry *, void *);
458 static int route_output_get_callback(int, struct rt_addrinfo *,
459 struct rtentry *, void *, int);
460 static int route_output_change_callback(int, struct rt_addrinfo *,
461 struct rtentry *, void *, int);
462 static int route_output_lock_callback(int, struct rt_addrinfo *,
463 struct rtentry *, void *, int);
467 route_output(struct mbuf *m, struct socket *so, ...)
469 struct rt_msghdr *rtm = NULL;
470 struct rawcb *rp = NULL;
471 struct pr_output_info *oi;
472 struct rt_addrinfo rtinfo;
479 oi = __va_arg(ap, struct pr_output_info *);
482 #define gotoerr(e) { error = e; goto flush;}
485 (m->m_len < sizeof(long) &&
486 (m = m_pullup(m, sizeof(long))) == NULL))
488 len = m->m_pkthdr.len;
489 if (len < sizeof(struct rt_msghdr) ||
490 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
491 rtinfo.rti_dst = NULL;
494 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
496 rtinfo.rti_dst = NULL;
499 m_copydata(m, 0, len, (caddr_t)rtm);
500 if (rtm->rtm_version != RTM_VERSION) {
501 rtinfo.rti_dst = NULL;
502 gotoerr(EPROTONOSUPPORT);
504 rtm->rtm_pid = oi->p_pid;
505 bzero(&rtinfo, sizeof(struct rt_addrinfo));
506 rtinfo.rti_addrs = rtm->rtm_addrs;
507 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
508 rtinfo.rti_dst = NULL;
511 rtinfo.rti_flags = rtm->rtm_flags;
512 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
513 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
516 if (rtinfo.rti_genmask != NULL) {
517 struct radix_node *n;
519 #define clen(s) (*(u_char *)(s))
520 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
522 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
523 bcmp((char *)rtinfo.rti_genmask + 1,
524 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
525 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
531 * Verify that the caller has the appropriate privilege; RTM_GET
532 * is the only operation the non-superuser is allowed.
534 if (rtm->rtm_type != RTM_GET &&
535 priv_check_cred(so->so_cred, PRIV_ROOT, 0) != 0)
538 switch (rtm->rtm_type) {
540 if (rtinfo.rti_gateway == NULL) {
543 error = rtrequest1_global(RTM_ADD, &rtinfo,
544 route_output_add_callback, rtm);
549 * note: &rtm passed as argument so 'rtm' can be replaced.
551 error = rtrequest1_global(RTM_DELETE, &rtinfo,
552 route_output_delete_callback, &rtm);
556 * note: &rtm passed as argument so 'rtm' can be replaced.
558 error = rtsearch_global(RTM_GET, &rtinfo,
559 route_output_get_callback, &rtm,
563 error = rtsearch_global(RTM_CHANGE, &rtinfo,
564 route_output_change_callback, rtm,
568 error = rtsearch_global(RTM_LOCK, &rtinfo,
569 route_output_lock_callback, rtm,
580 rtm->rtm_errno = error;
582 rtm->rtm_flags |= RTF_DONE;
586 * Check to see if we don't want our own messages.
588 if (!(so->so_options & SO_USELOOPBACK)) {
589 if (route_cb.any_count <= 1) {
591 kfree(rtm, M_RTABLE);
595 /* There is another listener, so construct message */
599 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
600 if (m->m_pkthdr.len < rtm->rtm_msglen) {
603 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
604 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
605 kfree(rtm, M_RTABLE);
608 rts_input_skip(m, familyof(rtinfo.rti_dst), rp);
613 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
614 struct rtentry *rt, void *arg)
616 struct rt_msghdr *rtm = arg;
618 if (error == 0 && rt != NULL) {
619 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
621 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
622 rt->rt_rmx.rmx_locks |=
623 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
624 rt->rt_genmask = rtinfo->rti_genmask;
625 rtm->rtm_index = rt->rt_ifp->if_index;
630 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
631 struct rtentry *rt, void *arg)
633 struct rt_msghdr **rtm = arg;
635 if (error == 0 && rt) {
637 if (fillrtmsg(rtm, rt, rtinfo) != 0) {
639 /* XXX no way to return the error */
646 route_output_get_callback(int cmd, struct rt_addrinfo *rtinfo,
647 struct rtentry *rt, void *arg, int found_cnt)
649 struct rt_msghdr **rtm = arg;
650 int error, found = 0;
652 if (((rtinfo->rti_flags ^ rt->rt_flags) & RTF_HOST) == 0)
655 error = fillrtmsg(rtm, rt, rtinfo);
656 if (!error && found) {
657 /* Got the exact match, we could return now! */
664 route_output_change_callback(int cmd, struct rt_addrinfo *rtinfo,
665 struct rtentry *rt, void *arg, int found_cnt)
667 struct rt_msghdr *rtm = arg;
672 * new gateway could require new ifaddr, ifp;
673 * flags may also be different; ifp may be specified
674 * by ll sockaddr when protocol address is ambiguous
676 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
677 rtinfo->rti_ifpaddr != NULL ||
678 (rtinfo->rti_ifaaddr != NULL &&
679 !sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))) {
680 error = rt_getifa(rtinfo);
684 if (rtinfo->rti_gateway != NULL) {
686 * We only need to generate rtmsg upon the
687 * first route to be changed.
689 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway,
690 found_cnt == 1 ? RTL_REPORTMSG : RTL_DONTREPORT);
694 if ((ifa = rtinfo->rti_ifa) != NULL) {
695 struct ifaddr *oifa = rt->rt_ifa;
698 if (oifa && oifa->ifa_rtrequest)
699 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo);
703 rt->rt_ifp = rtinfo->rti_ifp;
706 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx);
707 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
708 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo);
709 if (rtinfo->rti_genmask != NULL)
710 rt->rt_genmask = rtinfo->rti_genmask;
711 rtm->rtm_index = rt->rt_ifp->if_index;
717 route_output_lock_callback(int cmd, struct rt_addrinfo *rtinfo,
718 struct rtentry *rt, void *arg,
719 int found_cnt __unused)
721 struct rt_msghdr *rtm = arg;
723 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
724 rt->rt_rmx.rmx_locks |=
725 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
730 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
732 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
733 setmetric(RTV_RPIPE, rmx_recvpipe);
734 setmetric(RTV_SPIPE, rmx_sendpipe);
735 setmetric(RTV_SSTHRESH, rmx_ssthresh);
736 setmetric(RTV_RTT, rmx_rtt);
737 setmetric(RTV_RTTVAR, rmx_rttvar);
738 setmetric(RTV_HOPCOUNT, rmx_hopcount);
739 setmetric(RTV_MTU, rmx_mtu);
740 setmetric(RTV_EXPIRE, rmx_expire);
745 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
748 * Extract the addresses of the passed sockaddrs.
749 * Do a little sanity checking so as to avoid bad memory references.
750 * This data is derived straight from userland.
753 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
758 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
759 if ((rtinfo->rti_addrs & (1 << i)) == 0)
761 sa = (struct sockaddr *)cp;
765 if ((cp + sa->sa_len) > cplim) {
770 * There are no more... Quit now.
771 * If there are more bits, they are in error.
772 * I've seen this. route(1) can evidently generate these.
773 * This causes kernel to core dump.
774 * For compatibility, if we see this, point to a safe address.
776 if (sa->sa_len == 0) {
777 static struct sockaddr sa_zero = {
778 sizeof sa_zero, AF_INET,
781 rtinfo->rti_info[i] = &sa_zero;
782 kprintf("rtsock: received more addr bits than sockaddrs.\n");
783 return (0); /* should be EINVAL but for compat */
786 /* Accept the sockaddr. */
787 rtinfo->rti_info[i] = sa;
788 cp += ROUNDUP(sa->sa_len);
794 rt_msghdrsize(int type)
799 return sizeof(struct ifa_msghdr);
802 return sizeof(struct ifma_msghdr);
804 return sizeof(struct if_msghdr);
807 return sizeof(struct if_announcemsghdr);
809 return sizeof(struct rt_msghdr);
814 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
818 len = rt_msghdrsize(type);
819 for (i = 0; i < RTAX_MAX; i++) {
820 if (rtinfo->rti_info[i] != NULL)
821 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
828 * Build a routing message in a buffer.
829 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
830 * to the end of the buffer after the message header.
832 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
833 * This side-effect can be avoided if we reorder the addrs bitmask field in all
834 * the route messages to line up so we can set it here instead of back in the
838 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
840 struct rt_msghdr *rtm;
844 rtm = (struct rt_msghdr *) buf;
845 rtm->rtm_version = RTM_VERSION;
846 rtm->rtm_type = type;
847 rtm->rtm_msglen = msglen;
849 cp = (char *)buf + rt_msghdrsize(type);
850 rtinfo->rti_addrs = 0;
851 for (i = 0; i < RTAX_MAX; i++) {
854 if ((sa = rtinfo->rti_info[i]) == NULL)
856 rtinfo->rti_addrs |= (1 << i);
857 dlen = ROUNDUP(sa->sa_len);
864 * Build a routing message in a mbuf chain.
865 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
866 * to the end of the mbuf after the message header.
868 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
869 * This side-effect can be avoided if we reorder the addrs bitmask field in all
870 * the route messages to line up so we can set it here instead of back in the
874 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
877 struct rt_msghdr *rtm;
881 hlen = rt_msghdrsize(type);
882 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
884 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
888 m->m_pkthdr.len = m->m_len = hlen;
889 m->m_pkthdr.rcvif = NULL;
890 rtinfo->rti_addrs = 0;
892 for (i = 0; i < RTAX_MAX; i++) {
896 if ((sa = rtinfo->rti_info[i]) == NULL)
898 rtinfo->rti_addrs |= (1 << i);
899 dlen = ROUNDUP(sa->sa_len);
900 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
903 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
907 rtm = mtod(m, struct rt_msghdr *);
909 rtm->rtm_msglen = len;
910 rtm->rtm_version = RTM_VERSION;
911 rtm->rtm_type = type;
916 * This routine is called to generate a message from the routing
917 * socket indicating that a redirect has occurred, a routing lookup
918 * has failed, or that a protocol has detected timeouts to a particular
922 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
924 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
925 struct rt_msghdr *rtm;
928 if (route_cb.any_count == 0)
930 m = rt_msg_mbuf(type, rtinfo);
933 rtm = mtod(m, struct rt_msghdr *);
934 rtm->rtm_flags = RTF_DONE | flags;
935 rtm->rtm_errno = error;
936 rtm->rtm_addrs = rtinfo->rti_addrs;
937 rts_input(m, familyof(dst));
941 rt_dstmsg(int type, struct sockaddr *dst, int error)
943 struct rt_msghdr *rtm;
944 struct rt_addrinfo addrs;
947 if (route_cb.any_count == 0)
949 bzero(&addrs, sizeof(struct rt_addrinfo));
950 addrs.rti_info[RTAX_DST] = dst;
951 m = rt_msg_mbuf(type, &addrs);
954 rtm = mtod(m, struct rt_msghdr *);
955 rtm->rtm_flags = RTF_DONE;
956 rtm->rtm_errno = error;
957 rtm->rtm_addrs = addrs.rti_addrs;
958 rts_input(m, familyof(dst));
962 * This routine is called to generate a message from the routing
963 * socket indicating that the status of a network interface has changed.
966 rt_ifmsg(struct ifnet *ifp)
968 struct if_msghdr *ifm;
970 struct rt_addrinfo rtinfo;
972 if (route_cb.any_count == 0)
974 bzero(&rtinfo, sizeof(struct rt_addrinfo));
975 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
978 ifm = mtod(m, struct if_msghdr *);
979 ifm->ifm_index = ifp->if_index;
980 ifm->ifm_flags = ifp->if_flags;
981 ifm->ifm_data = ifp->if_data;
987 rt_ifamsg(int cmd, struct ifaddr *ifa)
989 struct ifa_msghdr *ifam;
990 struct rt_addrinfo rtinfo;
992 struct ifnet *ifp = ifa->ifa_ifp;
994 bzero(&rtinfo, sizeof(struct rt_addrinfo));
995 rtinfo.rti_ifaaddr = ifa->ifa_addr;
997 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
998 rtinfo.rti_netmask = ifa->ifa_netmask;
999 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1001 m = rt_msg_mbuf(cmd, &rtinfo);
1005 ifam = mtod(m, struct ifa_msghdr *);
1006 ifam->ifam_index = ifp->if_index;
1007 ifam->ifam_metric = ifa->ifa_metric;
1008 ifam->ifam_flags = ifa->ifa_flags;
1009 ifam->ifam_addrs = rtinfo.rti_addrs;
1011 rts_input(m, familyof(ifa->ifa_addr));
1015 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
1017 struct rt_msghdr *rtm;
1018 struct rt_addrinfo rtinfo;
1020 struct sockaddr *dst;
1025 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1026 rtinfo.rti_dst = dst = rt_key(rt);
1027 rtinfo.rti_gateway = rt->rt_gateway;
1028 rtinfo.rti_netmask = rt_mask(rt);
1030 rtinfo.rti_ifpaddr =
1031 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1033 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1035 m = rt_msg_mbuf(cmd, &rtinfo);
1039 rtm = mtod(m, struct rt_msghdr *);
1041 rtm->rtm_index = ifp->if_index;
1042 rtm->rtm_flags |= rt->rt_flags;
1043 rtm->rtm_errno = error;
1044 rtm->rtm_addrs = rtinfo.rti_addrs;
1046 rts_input(m, familyof(dst));
1050 * This is called to generate messages from the routing socket
1051 * indicating a network interface has had addresses associated with it.
1052 * if we ever reverse the logic and replace messages TO the routing
1053 * socket indicate a request to configure interfaces, then it will
1054 * be unnecessary as the routing socket will automatically generate
1058 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1062 * notify the SCTP stack
1063 * this will only get called when an address is added/deleted
1064 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1067 sctp_add_ip_address(ifa);
1068 else if (cmd == RTM_DELETE)
1069 sctp_delete_ip_address(ifa);
1072 if (route_cb.any_count == 0)
1075 if (cmd == RTM_ADD) {
1076 rt_ifamsg(RTM_NEWADDR, ifa);
1077 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
1079 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
1080 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
1081 rt_ifamsg(RTM_DELADDR, ifa);
1086 * This is the analogue to the rt_newaddrmsg which performs the same
1087 * function but for multicast group memberhips. This is easier since
1088 * there is no route state to worry about.
1091 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1093 struct rt_addrinfo rtinfo;
1094 struct mbuf *m = NULL;
1095 struct ifnet *ifp = ifma->ifma_ifp;
1096 struct ifma_msghdr *ifmam;
1098 if (route_cb.any_count == 0)
1101 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1102 rtinfo.rti_ifaaddr = ifma->ifma_addr;
1103 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
1104 rtinfo.rti_ifpaddr =
1105 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1108 * If a link-layer address is present, present it as a ``gateway''
1109 * (similarly to how ARP entries, e.g., are presented).
1111 rtinfo.rti_gateway = ifma->ifma_lladdr;
1113 m = rt_msg_mbuf(cmd, &rtinfo);
1117 ifmam = mtod(m, struct ifma_msghdr *);
1118 ifmam->ifmam_index = ifp->if_index;
1119 ifmam->ifmam_addrs = rtinfo.rti_addrs;
1121 rts_input(m, familyof(ifma->ifma_addr));
1124 static struct mbuf *
1125 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1126 struct rt_addrinfo *info)
1128 struct if_announcemsghdr *ifan;
1131 if (route_cb.any_count == 0)
1134 bzero(info, sizeof(*info));
1135 m = rt_msg_mbuf(type, info);
1139 ifan = mtod(m, struct if_announcemsghdr *);
1140 ifan->ifan_index = ifp->if_index;
1141 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1142 ifan->ifan_what = what;
1147 * This is called to generate routing socket messages indicating
1148 * IEEE80211 wireless events.
1149 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1152 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1154 struct rt_addrinfo info;
1157 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1162 * Append the ieee80211 data. Try to stick it in the
1163 * mbuf containing the ifannounce msg; otherwise allocate
1164 * a new mbuf and append.
1166 * NB: we assume m is a single mbuf.
1168 if (data_len > M_TRAILINGSPACE(m)) {
1169 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA);
1174 bcopy(data, mtod(n, void *), data_len);
1175 n->m_len = data_len;
1177 } else if (data_len > 0) {
1178 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1179 m->m_len += data_len;
1182 if (m->m_flags & M_PKTHDR)
1183 m->m_pkthdr.len += data_len;
1184 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1189 * This is called to generate routing socket messages indicating
1190 * network interface arrival and departure.
1193 rt_ifannouncemsg(struct ifnet *ifp, int what)
1195 struct rt_addrinfo addrinfo;
1198 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo);
1204 resizewalkarg(struct walkarg *w, int len)
1208 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1211 if (w->w_tmem != NULL)
1212 kfree(w->w_tmem, M_RTABLE);
1214 w->w_tmemsize = len;
1219 * This is used in dumping the kernel table via sysctl().
1222 sysctl_dumpentry(struct radix_node *rn, void *vw)
1224 struct walkarg *w = vw;
1225 struct rtentry *rt = (struct rtentry *)rn;
1226 struct rt_addrinfo rtinfo;
1229 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1232 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1233 rtinfo.rti_dst = rt_key(rt);
1234 rtinfo.rti_gateway = rt->rt_gateway;
1235 rtinfo.rti_netmask = rt_mask(rt);
1236 rtinfo.rti_genmask = rt->rt_genmask;
1237 if (rt->rt_ifp != NULL) {
1238 rtinfo.rti_ifpaddr =
1239 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1240 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1241 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1242 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1244 msglen = rt_msgsize(RTM_GET, &rtinfo);
1245 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1247 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1248 if (w->w_req != NULL) {
1249 struct rt_msghdr *rtm = w->w_tmem;
1251 rtm->rtm_flags = rt->rt_flags;
1252 rtm->rtm_use = rt->rt_use;
1253 rtm->rtm_rmx = rt->rt_rmx;
1254 rtm->rtm_index = rt->rt_ifp->if_index;
1255 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1256 rtm->rtm_addrs = rtinfo.rti_addrs;
1257 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1264 sysctl_iflist(int af, struct walkarg *w)
1267 struct rt_addrinfo rtinfo;
1270 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1271 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1272 struct ifaddr_container *ifac;
1275 if (w->w_arg && w->w_arg != ifp->if_index)
1277 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]);
1279 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1280 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1281 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1283 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1284 rtinfo.rti_ifpaddr = NULL;
1285 if (w->w_req != NULL && w->w_tmem != NULL) {
1286 struct if_msghdr *ifm = w->w_tmem;
1288 ifm->ifm_index = ifp->if_index;
1289 ifm->ifm_flags = ifp->if_flags;
1290 ifm->ifm_data = ifp->if_data;
1291 ifm->ifm_addrs = rtinfo.rti_addrs;
1292 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1296 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) {
1299 if (af && af != ifa->ifa_addr->sa_family)
1301 if (curproc->p_ucred->cr_prison &&
1302 prison_if(curproc->p_ucred, ifa->ifa_addr))
1304 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1305 rtinfo.rti_netmask = ifa->ifa_netmask;
1306 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1307 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1308 if (w->w_tmemsize < msglen &&
1309 resizewalkarg(w, msglen) != 0)
1311 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1312 if (w->w_req != NULL) {
1313 struct ifa_msghdr *ifam = w->w_tmem;
1315 ifam->ifam_index = ifa->ifa_ifp->if_index;
1316 ifam->ifam_flags = ifa->ifa_flags;
1317 ifam->ifam_metric = ifa->ifa_metric;
1318 ifam->ifam_addrs = rtinfo.rti_addrs;
1319 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1324 rtinfo.rti_netmask = NULL;
1325 rtinfo.rti_ifaaddr = NULL;
1326 rtinfo.rti_bcastaddr = NULL;
1332 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1334 int *name = (int *)arg1;
1335 u_int namelen = arg2;
1336 struct radix_node_head *rnh;
1337 int i, error = EINVAL;
1346 if (namelen != 3 && namelen != 4)
1349 bzero(&w, sizeof w);
1355 * Optional third argument specifies cpu, used primarily for
1356 * debugging the route table.
1359 if (name[3] < 0 || name[3] >= ncpus)
1362 lwkt_migratecpu(name[3]);
1370 for (i = 1; i <= AF_MAX; i++)
1371 if ((rnh = rt_tables[mycpuid][i]) &&
1372 (af == 0 || af == i) &&
1373 (error = rnh->rnh_walktree(rnh,
1374 sysctl_dumpentry, &w)))
1379 error = sysctl_iflist(af, &w);
1382 if (w.w_tmem != NULL)
1383 kfree(w.w_tmem, M_RTABLE);
1385 lwkt_migratecpu(origcpu);
1389 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1392 * Definitions of protocols supported in the ROUTE domain.
1395 static struct domain routedomain; /* or at least forward */
1397 static struct protosw routesw[] = {
1398 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1399 0, route_output, raw_ctlinput, 0,
1400 cpu0_soport, cpu0_ctlport,
1406 static struct domain routedomain = {
1407 PF_ROUTE, "route", NULL, NULL, NULL,
1408 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],