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) 1988, 1991, 1993
35 * The Regents of the University of California. All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 1.45 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;
436 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
437 if (rtm->rtm_msglen < msglen) {
438 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
443 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
445 rtm->rtm_flags = rt->rt_flags;
446 rtm->rtm_rmx = rt->rt_rmx;
447 rtm->rtm_addrs = rtinfo->rti_addrs;
452 static void route_output_add_callback(int, int, struct rt_addrinfo *,
453 struct rtentry *, void *);
454 static void route_output_delete_callback(int, int, struct rt_addrinfo *,
455 struct rtentry *, void *);
456 static int route_output_change_callback(int, struct rt_addrinfo *,
457 struct rtentry *, void *);
458 static int route_output_lock_callback(int, struct rt_addrinfo *,
459 struct rtentry *, void *);
463 route_output(struct mbuf *m, struct socket *so, ...)
465 struct rt_msghdr *rtm = NULL;
467 struct radix_node_head *rnh;
468 struct rawcb *rp = NULL;
469 struct pr_output_info *oi;
470 struct rt_addrinfo rtinfo;
475 oi = __va_arg(ap, struct pr_output_info *);
478 #define gotoerr(e) { error = e; goto flush;}
481 (m->m_len < sizeof(long) &&
482 (m = m_pullup(m, sizeof(long))) == NULL))
484 if (!(m->m_flags & M_PKTHDR))
485 panic("route_output");
486 len = m->m_pkthdr.len;
487 if (len < sizeof(struct rt_msghdr) ||
488 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
489 rtinfo.rti_dst = NULL;
492 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
494 rtinfo.rti_dst = NULL;
497 m_copydata(m, 0, len, (caddr_t)rtm);
498 if (rtm->rtm_version != RTM_VERSION) {
499 rtinfo.rti_dst = NULL;
500 gotoerr(EPROTONOSUPPORT);
502 rtm->rtm_pid = oi->p_pid;
503 bzero(&rtinfo, sizeof(struct rt_addrinfo));
504 rtinfo.rti_addrs = rtm->rtm_addrs;
505 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
506 rtinfo.rti_dst = NULL;
509 rtinfo.rti_flags = rtm->rtm_flags;
510 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
511 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
514 if (rtinfo.rti_genmask != NULL) {
515 struct radix_node *n;
517 #define clen(s) (*(u_char *)(s))
518 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
520 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
521 bcmp((char *)rtinfo.rti_genmask + 1,
522 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
523 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
529 * Verify that the caller has the appropriate privilege; RTM_GET
530 * is the only operation the non-superuser is allowed.
532 if (rtm->rtm_type != RTM_GET && priv_check_cred(so->so_cred, PRIV_ROOT, 0) != 0)
535 switch (rtm->rtm_type) {
537 if (rtinfo.rti_gateway == NULL) {
540 error = rtrequest1_global(RTM_ADD, &rtinfo,
541 route_output_add_callback, rtm);
546 * note: &rtm passed as argument so 'rtm' can be replaced.
548 error = rtrequest1_global(RTM_DELETE, &rtinfo,
549 route_output_delete_callback, &rtm);
552 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family];
554 error = EAFNOSUPPORT;
557 rt = (struct rtentry *)
558 rnh->rnh_lookup((char *)rtinfo.rti_dst,
559 (char *)rtinfo.rti_netmask, rnh);
565 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
570 error = rtsearch_global(RTM_CHANGE, &rtinfo,
571 route_output_change_callback, rtm,
575 error = rtsearch_global(RTM_LOCK, &rtinfo,
576 route_output_lock_callback, rtm,
587 rtm->rtm_errno = error;
589 rtm->rtm_flags |= RTF_DONE;
593 * Check to see if we don't want our own messages.
595 if (!(so->so_options & SO_USELOOPBACK)) {
596 if (route_cb.any_count <= 1) {
598 kfree(rtm, M_RTABLE);
602 /* There is another listener, so construct message */
606 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
607 if (m->m_pkthdr.len < rtm->rtm_msglen) {
610 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
611 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
612 kfree(rtm, M_RTABLE);
615 rts_input_skip(m, familyof(rtinfo.rti_dst), rp);
620 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
621 struct rtentry *rt, void *arg)
623 struct rt_msghdr *rtm = arg;
625 if (error == 0 && rt != NULL) {
626 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
628 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
629 rt->rt_rmx.rmx_locks |=
630 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
631 rt->rt_genmask = rtinfo->rti_genmask;
636 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
637 struct rtentry *rt, void *arg)
639 struct rt_msghdr **rtm = arg;
641 if (error == 0 && rt) {
643 if (fillrtmsg(rtm, rt, rtinfo) != 0) {
645 /* XXX no way to return the error */
652 route_output_change_callback(int cmd, struct rt_addrinfo *rtinfo,
653 struct rtentry *rt, void *arg)
655 struct rt_msghdr *rtm = arg;
660 * new gateway could require new ifaddr, ifp;
661 * flags may also be different; ifp may be specified
662 * by ll sockaddr when protocol address is ambiguous
664 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
665 rtinfo->rti_ifpaddr != NULL ||
666 (rtinfo->rti_ifaaddr != NULL &&
667 !sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))) {
668 error = rt_getifa(rtinfo);
672 if (rtinfo->rti_gateway != NULL) {
673 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway);
677 if ((ifa = rtinfo->rti_ifa) != NULL) {
678 struct ifaddr *oifa = rt->rt_ifa;
681 if (oifa && oifa->ifa_rtrequest)
682 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo);
686 rt->rt_ifp = rtinfo->rti_ifp;
689 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx);
690 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
691 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo);
692 if (rtinfo->rti_genmask != NULL)
693 rt->rt_genmask = rtinfo->rti_genmask;
699 route_output_lock_callback(int cmd, struct rt_addrinfo *rtinfo,
700 struct rtentry *rt, void *arg)
702 struct rt_msghdr *rtm = arg;
704 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
705 rt->rt_rmx.rmx_locks |=
706 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
711 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
713 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
714 setmetric(RTV_RPIPE, rmx_recvpipe);
715 setmetric(RTV_SPIPE, rmx_sendpipe);
716 setmetric(RTV_SSTHRESH, rmx_ssthresh);
717 setmetric(RTV_RTT, rmx_rtt);
718 setmetric(RTV_RTTVAR, rmx_rttvar);
719 setmetric(RTV_HOPCOUNT, rmx_hopcount);
720 setmetric(RTV_MTU, rmx_mtu);
721 setmetric(RTV_EXPIRE, rmx_expire);
726 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
729 * Extract the addresses of the passed sockaddrs.
730 * Do a little sanity checking so as to avoid bad memory references.
731 * This data is derived straight from userland.
734 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
739 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
740 if ((rtinfo->rti_addrs & (1 << i)) == 0)
742 sa = (struct sockaddr *)cp;
746 if ((cp + sa->sa_len) > cplim) {
751 * There are no more... Quit now.
752 * If there are more bits, they are in error.
753 * I've seen this. route(1) can evidently generate these.
754 * This causes kernel to core dump.
755 * For compatibility, if we see this, point to a safe address.
757 if (sa->sa_len == 0) {
758 static struct sockaddr sa_zero = {
759 sizeof sa_zero, AF_INET,
762 rtinfo->rti_info[i] = &sa_zero;
763 kprintf("rtsock: received more addr bits than sockaddrs.\n");
764 return (0); /* should be EINVAL but for compat */
767 /* Accept the sockaddr. */
768 rtinfo->rti_info[i] = sa;
769 cp += ROUNDUP(sa->sa_len);
775 rt_msghdrsize(int type)
780 return sizeof(struct ifa_msghdr);
783 return sizeof(struct ifma_msghdr);
785 return sizeof(struct if_msghdr);
788 return sizeof(struct if_announcemsghdr);
790 return sizeof(struct rt_msghdr);
795 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
799 len = rt_msghdrsize(type);
800 for (i = 0; i < RTAX_MAX; i++) {
801 if (rtinfo->rti_info[i] != NULL)
802 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
809 * Build a routing message in a buffer.
810 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
811 * to the end of the buffer after the message header.
813 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
814 * This side-effect can be avoided if we reorder the addrs bitmask field in all
815 * the route messages to line up so we can set it here instead of back in the
819 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
821 struct rt_msghdr *rtm;
825 rtm = (struct rt_msghdr *) buf;
826 rtm->rtm_version = RTM_VERSION;
827 rtm->rtm_type = type;
828 rtm->rtm_msglen = msglen;
830 cp = (char *)buf + rt_msghdrsize(type);
831 rtinfo->rti_addrs = 0;
832 for (i = 0; i < RTAX_MAX; i++) {
835 if ((sa = rtinfo->rti_info[i]) == NULL)
837 rtinfo->rti_addrs |= (1 << i);
838 dlen = ROUNDUP(sa->sa_len);
845 * Build a routing message in a mbuf chain.
846 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
847 * to the end of the mbuf after the message header.
849 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
850 * This side-effect can be avoided if we reorder the addrs bitmask field in all
851 * the route messages to line up so we can set it here instead of back in the
855 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
858 struct rt_msghdr *rtm;
862 hlen = rt_msghdrsize(type);
863 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
865 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
869 m->m_pkthdr.len = m->m_len = hlen;
870 m->m_pkthdr.rcvif = NULL;
871 rtinfo->rti_addrs = 0;
873 for (i = 0; i < RTAX_MAX; i++) {
877 if ((sa = rtinfo->rti_info[i]) == NULL)
879 rtinfo->rti_addrs |= (1 << i);
880 dlen = ROUNDUP(sa->sa_len);
881 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
884 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
888 rtm = mtod(m, struct rt_msghdr *);
890 rtm->rtm_msglen = len;
891 rtm->rtm_version = RTM_VERSION;
892 rtm->rtm_type = type;
897 * This routine is called to generate a message from the routing
898 * socket indicating that a redirect has occurred, a routing lookup
899 * has failed, or that a protocol has detected timeouts to a particular
903 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
905 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
906 struct rt_msghdr *rtm;
909 if (route_cb.any_count == 0)
911 m = rt_msg_mbuf(type, rtinfo);
914 rtm = mtod(m, struct rt_msghdr *);
915 rtm->rtm_flags = RTF_DONE | flags;
916 rtm->rtm_errno = error;
917 rtm->rtm_addrs = rtinfo->rti_addrs;
918 rts_input(m, familyof(dst));
922 rt_dstmsg(int type, struct sockaddr *dst, int error)
924 struct rt_msghdr *rtm;
925 struct rt_addrinfo addrs;
928 if (route_cb.any_count == 0)
930 bzero(&addrs, sizeof(struct rt_addrinfo));
931 addrs.rti_info[RTAX_DST] = dst;
932 m = rt_msg_mbuf(type, &addrs);
935 rtm = mtod(m, struct rt_msghdr *);
936 rtm->rtm_flags = RTF_DONE;
937 rtm->rtm_errno = error;
938 rtm->rtm_addrs = addrs.rti_addrs;
939 rts_input(m, familyof(dst));
943 * This routine is called to generate a message from the routing
944 * socket indicating that the status of a network interface has changed.
947 rt_ifmsg(struct ifnet *ifp)
949 struct if_msghdr *ifm;
951 struct rt_addrinfo rtinfo;
953 if (route_cb.any_count == 0)
955 bzero(&rtinfo, sizeof(struct rt_addrinfo));
956 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
959 ifm = mtod(m, struct if_msghdr *);
960 ifm->ifm_index = ifp->if_index;
961 ifm->ifm_flags = ifp->if_flags;
962 ifm->ifm_data = ifp->if_data;
968 rt_ifamsg(int cmd, struct ifaddr *ifa)
970 struct ifa_msghdr *ifam;
971 struct rt_addrinfo rtinfo;
973 struct ifnet *ifp = ifa->ifa_ifp;
975 bzero(&rtinfo, sizeof(struct rt_addrinfo));
976 rtinfo.rti_ifaaddr = ifa->ifa_addr;
978 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
979 rtinfo.rti_netmask = ifa->ifa_netmask;
980 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
982 m = rt_msg_mbuf(cmd, &rtinfo);
986 ifam = mtod(m, struct ifa_msghdr *);
987 ifam->ifam_index = ifp->if_index;
988 ifam->ifam_metric = ifa->ifa_metric;
989 ifam->ifam_flags = ifa->ifa_flags;
990 ifam->ifam_addrs = rtinfo.rti_addrs;
992 rts_input(m, familyof(ifa->ifa_addr));
996 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
998 struct rt_msghdr *rtm;
999 struct rt_addrinfo rtinfo;
1001 struct sockaddr *dst;
1006 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1007 rtinfo.rti_dst = dst = rt_key(rt);
1008 rtinfo.rti_gateway = rt->rt_gateway;
1009 rtinfo.rti_netmask = rt_mask(rt);
1011 rtinfo.rti_ifpaddr =
1012 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1014 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1016 m = rt_msg_mbuf(cmd, &rtinfo);
1020 rtm = mtod(m, struct rt_msghdr *);
1022 rtm->rtm_index = ifp->if_index;
1023 rtm->rtm_flags |= rt->rt_flags;
1024 rtm->rtm_errno = error;
1025 rtm->rtm_addrs = rtinfo.rti_addrs;
1027 rts_input(m, familyof(dst));
1031 * This is called to generate messages from the routing socket
1032 * indicating a network interface has had addresses associated with it.
1033 * if we ever reverse the logic and replace messages TO the routing
1034 * socket indicate a request to configure interfaces, then it will
1035 * be unnecessary as the routing socket will automatically generate
1039 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1043 * notify the SCTP stack
1044 * this will only get called when an address is added/deleted
1045 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1048 sctp_add_ip_address(ifa);
1049 else if (cmd == RTM_DELETE)
1050 sctp_delete_ip_address(ifa);
1053 if (route_cb.any_count == 0)
1056 if (cmd == RTM_ADD) {
1057 rt_ifamsg(RTM_NEWADDR, ifa);
1058 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
1060 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
1061 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
1062 rt_ifamsg(RTM_DELADDR, ifa);
1067 * This is the analogue to the rt_newaddrmsg which performs the same
1068 * function but for multicast group memberhips. This is easier since
1069 * there is no route state to worry about.
1072 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1074 struct rt_addrinfo rtinfo;
1075 struct mbuf *m = NULL;
1076 struct ifnet *ifp = ifma->ifma_ifp;
1077 struct ifma_msghdr *ifmam;
1079 if (route_cb.any_count == 0)
1082 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1083 rtinfo.rti_ifaaddr = ifma->ifma_addr;
1084 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
1085 rtinfo.rti_ifpaddr =
1086 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1089 * If a link-layer address is present, present it as a ``gateway''
1090 * (similarly to how ARP entries, e.g., are presented).
1092 rtinfo.rti_gateway = ifma->ifma_lladdr;
1094 m = rt_msg_mbuf(cmd, &rtinfo);
1098 ifmam = mtod(m, struct ifma_msghdr *);
1099 ifmam->ifmam_index = ifp->if_index;
1100 ifmam->ifmam_addrs = rtinfo.rti_addrs;
1102 rts_input(m, familyof(ifma->ifma_addr));
1105 static struct mbuf *
1106 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1107 struct rt_addrinfo *info)
1109 struct if_announcemsghdr *ifan;
1112 if (route_cb.any_count == 0)
1115 bzero(info, sizeof(*info));
1116 m = rt_msg_mbuf(type, info);
1120 ifan = mtod(m, struct if_announcemsghdr *);
1121 ifan->ifan_index = ifp->if_index;
1122 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1123 ifan->ifan_what = what;
1128 * This is called to generate routing socket messages indicating
1129 * IEEE80211 wireless events.
1130 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1133 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1135 struct rt_addrinfo info;
1138 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1143 * Append the ieee80211 data. Try to stick it in the
1144 * mbuf containing the ifannounce msg; otherwise allocate
1145 * a new mbuf and append.
1147 * NB: we assume m is a single mbuf.
1149 if (data_len > M_TRAILINGSPACE(m)) {
1150 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA);
1155 bcopy(data, mtod(n, void *), data_len);
1156 n->m_len = data_len;
1158 } else if (data_len > 0) {
1159 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1160 m->m_len += data_len;
1163 if (m->m_flags & M_PKTHDR)
1164 m->m_pkthdr.len += data_len;
1165 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1170 * This is called to generate routing socket messages indicating
1171 * network interface arrival and departure.
1174 rt_ifannouncemsg(struct ifnet *ifp, int what)
1176 struct rt_addrinfo addrinfo;
1179 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo);
1185 resizewalkarg(struct walkarg *w, int len)
1189 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1192 if (w->w_tmem != NULL)
1193 kfree(w->w_tmem, M_RTABLE);
1195 w->w_tmemsize = len;
1200 * This is used in dumping the kernel table via sysctl().
1203 sysctl_dumpentry(struct radix_node *rn, void *vw)
1205 struct walkarg *w = vw;
1206 struct rtentry *rt = (struct rtentry *)rn;
1207 struct rt_addrinfo rtinfo;
1210 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1213 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1214 rtinfo.rti_dst = rt_key(rt);
1215 rtinfo.rti_gateway = rt->rt_gateway;
1216 rtinfo.rti_netmask = rt_mask(rt);
1217 rtinfo.rti_genmask = rt->rt_genmask;
1218 if (rt->rt_ifp != NULL) {
1219 rtinfo.rti_ifpaddr =
1220 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1221 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1222 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1223 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1225 msglen = rt_msgsize(RTM_GET, &rtinfo);
1226 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1228 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1229 if (w->w_req != NULL) {
1230 struct rt_msghdr *rtm = w->w_tmem;
1232 rtm->rtm_flags = rt->rt_flags;
1233 rtm->rtm_use = rt->rt_use;
1234 rtm->rtm_rmx = rt->rt_rmx;
1235 rtm->rtm_index = rt->rt_ifp->if_index;
1236 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1237 rtm->rtm_addrs = rtinfo.rti_addrs;
1238 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1245 sysctl_iflist(int af, struct walkarg *w)
1248 struct rt_addrinfo rtinfo;
1251 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1252 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1253 struct ifaddr_container *ifac;
1256 if (w->w_arg && w->w_arg != ifp->if_index)
1258 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]);
1260 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1261 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1262 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1264 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1265 rtinfo.rti_ifpaddr = NULL;
1266 if (w->w_req != NULL && w->w_tmem != NULL) {
1267 struct if_msghdr *ifm = w->w_tmem;
1269 ifm->ifm_index = ifp->if_index;
1270 ifm->ifm_flags = ifp->if_flags;
1271 ifm->ifm_data = ifp->if_data;
1272 ifm->ifm_addrs = rtinfo.rti_addrs;
1273 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1277 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) {
1280 if (af && af != ifa->ifa_addr->sa_family)
1282 if (curproc->p_ucred->cr_prison &&
1283 prison_if(curproc->p_ucred, ifa->ifa_addr))
1285 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1286 rtinfo.rti_netmask = ifa->ifa_netmask;
1287 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1288 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1289 if (w->w_tmemsize < msglen &&
1290 resizewalkarg(w, msglen) != 0)
1292 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1293 if (w->w_req != NULL) {
1294 struct ifa_msghdr *ifam = w->w_tmem;
1296 ifam->ifam_index = ifa->ifa_ifp->if_index;
1297 ifam->ifam_flags = ifa->ifa_flags;
1298 ifam->ifam_metric = ifa->ifa_metric;
1299 ifam->ifam_addrs = rtinfo.rti_addrs;
1300 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1305 rtinfo.rti_netmask = NULL;
1306 rtinfo.rti_ifaaddr = NULL;
1307 rtinfo.rti_bcastaddr = NULL;
1313 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1315 int *name = (int *)arg1;
1316 u_int namelen = arg2;
1317 struct radix_node_head *rnh;
1318 int i, error = EINVAL;
1327 if (namelen != 3 && namelen != 4)
1330 bzero(&w, sizeof w);
1336 * Optional third argument specifies cpu, used primarily for
1337 * debugging the route table.
1340 if (name[3] < 0 || name[3] >= ncpus)
1343 lwkt_migratecpu(name[3]);
1351 for (i = 1; i <= AF_MAX; i++)
1352 if ((rnh = rt_tables[mycpuid][i]) &&
1353 (af == 0 || af == i) &&
1354 (error = rnh->rnh_walktree(rnh,
1355 sysctl_dumpentry, &w)))
1360 error = sysctl_iflist(af, &w);
1363 if (w.w_tmem != NULL)
1364 kfree(w.w_tmem, M_RTABLE);
1366 lwkt_migratecpu(origcpu);
1370 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1373 * Definitions of protocols supported in the ROUTE domain.
1376 static struct domain routedomain; /* or at least forward */
1378 static struct protosw routesw[] = {
1379 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1380 0, route_output, raw_ctlinput, 0,
1381 cpu0_soport, cpu0_ctlport,
1387 static struct domain routedomain = {
1388 PF_ROUTE, "route", NULL, NULL, NULL,
1389 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],