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;
360 raw_input(m, &route_proto, &route_src, &route_dst);
364 rts_input(struct mbuf *m, sa_family_t family)
366 struct netmsg_packet *pmsg;
369 port = cpu0_soport(NULL, NULL, NULL, 0);
370 pmsg = &m->m_hdr.mh_netmsg;
371 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport,
372 0, rts_input_handler);
374 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family;
375 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg);
379 reallocbuf(void *ptr, size_t len, size_t olen)
383 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
386 bcopy(ptr, newptr, olen);
387 kfree(ptr, M_RTABLE);
392 * Internal helper routine for route_output().
395 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt,
396 struct rt_addrinfo *rtinfo)
399 struct rt_msghdr *rtm = *prtm;
401 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */
402 rtinfo->rti_dst = rt_key(rt);
403 rtinfo->rti_gateway = rt->rt_gateway;
404 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */
405 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */
406 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
407 if (rt->rt_ifp != NULL) {
408 rtinfo->rti_ifpaddr =
409 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])
411 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
412 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
413 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
414 rtm->rtm_index = rt->rt_ifp->if_index;
416 rtinfo->rti_ifpaddr = NULL;
417 rtinfo->rti_ifaaddr = NULL;
421 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
422 if (rtm->rtm_msglen < msglen) {
423 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
428 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
430 rtm->rtm_flags = rt->rt_flags;
431 rtm->rtm_rmx = rt->rt_rmx;
432 rtm->rtm_addrs = rtinfo->rti_addrs;
437 static void route_output_add_callback(int, int, struct rt_addrinfo *,
438 struct rtentry *, void *);
439 static void route_output_delete_callback(int, int, struct rt_addrinfo *,
440 struct rtentry *, void *);
441 static void route_output_change_callback(int, int, struct rt_addrinfo *,
442 struct rtentry *, void *);
443 static void route_output_lock_callback(int, int, struct rt_addrinfo *,
444 struct rtentry *, void *);
448 route_output(struct mbuf *m, struct socket *so, ...)
450 struct rt_msghdr *rtm = NULL;
452 struct radix_node_head *rnh;
453 struct rawcb *rp = NULL;
454 struct pr_output_info *oi;
455 struct rt_addrinfo rtinfo;
460 oi = __va_arg(ap, struct pr_output_info *);
463 #define gotoerr(e) { error = e; goto flush;}
466 (m->m_len < sizeof(long) &&
467 (m = m_pullup(m, sizeof(long))) == NULL))
469 if (!(m->m_flags & M_PKTHDR))
470 panic("route_output");
471 len = m->m_pkthdr.len;
472 if (len < sizeof(struct rt_msghdr) ||
473 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
474 rtinfo.rti_dst = NULL;
477 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
479 rtinfo.rti_dst = NULL;
482 m_copydata(m, 0, len, (caddr_t)rtm);
483 if (rtm->rtm_version != RTM_VERSION) {
484 rtinfo.rti_dst = NULL;
485 gotoerr(EPROTONOSUPPORT);
487 rtm->rtm_pid = oi->p_pid;
488 bzero(&rtinfo, sizeof(struct rt_addrinfo));
489 rtinfo.rti_addrs = rtm->rtm_addrs;
490 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
491 rtinfo.rti_dst = NULL;
494 rtinfo.rti_flags = rtm->rtm_flags;
495 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
496 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
499 if (rtinfo.rti_genmask != NULL) {
500 struct radix_node *n;
502 #define clen(s) (*(u_char *)(s))
503 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
505 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
506 bcmp((char *)rtinfo.rti_genmask + 1,
507 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
508 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
514 * Verify that the caller has the appropriate privilege; RTM_GET
515 * is the only operation the non-superuser is allowed.
517 if (rtm->rtm_type != RTM_GET && priv_check_cred(so->so_cred, PRIV_ROOT, 0) != 0)
520 switch (rtm->rtm_type) {
522 if (rtinfo.rti_gateway == NULL) {
525 error = rtrequest1_global(RTM_ADD, &rtinfo,
526 route_output_add_callback, rtm);
531 * note: &rtm passed as argument so 'rtm' can be replaced.
533 error = rtrequest1_global(RTM_DELETE, &rtinfo,
534 route_output_delete_callback, &rtm);
537 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family];
539 error = EAFNOSUPPORT;
542 rt = (struct rtentry *)
543 rnh->rnh_lookup((char *)rtinfo.rti_dst,
544 (char *)rtinfo.rti_netmask, rnh);
550 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
555 error = rtrequest1_global(RTM_GET, &rtinfo,
556 route_output_change_callback, rtm);
559 error = rtrequest1_global(RTM_GET, &rtinfo,
560 route_output_lock_callback, rtm);
570 rtm->rtm_errno = error;
572 rtm->rtm_flags |= RTF_DONE;
576 * Check to see if we don't want our own messages.
578 if (!(so->so_options & SO_USELOOPBACK)) {
579 if (route_cb.any_count <= 1) {
581 kfree(rtm, M_RTABLE);
585 /* There is another listener, so construct message */
589 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
590 if (m->m_pkthdr.len < rtm->rtm_msglen) {
593 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
594 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
595 kfree(rtm, M_RTABLE);
598 rp->rcb_proto.sp_family = 0; /* Avoid us */
600 rts_input(m, familyof(rtinfo.rti_dst));
602 rp->rcb_proto.sp_family = PF_ROUTE;
607 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
608 struct rtentry *rt, void *arg)
610 struct rt_msghdr *rtm = arg;
612 if (error == 0 && rt != NULL) {
613 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
615 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
616 rt->rt_rmx.rmx_locks |=
617 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
618 rt->rt_genmask = rtinfo->rti_genmask;
623 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
624 struct rtentry *rt, void *arg)
626 struct rt_msghdr **rtm = arg;
628 if (error == 0 && rt) {
630 if (fillrtmsg(rtm, rt, rtinfo) != 0) {
632 /* XXX no way to return the error */
639 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
640 struct rtentry *rt, void *arg)
642 struct rt_msghdr *rtm = arg;
649 * new gateway could require new ifaddr, ifp;
650 * flags may also be different; ifp may be specified
651 * by ll sockaddr when protocol address is ambiguous
653 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
654 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL &&
655 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))
657 error = rt_getifa(rtinfo);
661 if (rtinfo->rti_gateway != NULL) {
662 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway);
666 if ((ifa = rtinfo->rti_ifa) != NULL) {
667 struct ifaddr *oifa = rt->rt_ifa;
670 if (oifa && oifa->ifa_rtrequest)
671 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo);
675 rt->rt_ifp = rtinfo->rti_ifp;
678 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx);
679 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
680 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo);
681 if (rtinfo->rti_genmask != NULL)
682 rt->rt_genmask = rtinfo->rti_genmask;
684 /* XXX no way to return error */
689 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
690 struct rtentry *rt, void *arg)
692 struct rt_msghdr *rtm = arg;
694 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
695 rt->rt_rmx.rmx_locks |=
696 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
700 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
702 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
703 setmetric(RTV_RPIPE, rmx_recvpipe);
704 setmetric(RTV_SPIPE, rmx_sendpipe);
705 setmetric(RTV_SSTHRESH, rmx_ssthresh);
706 setmetric(RTV_RTT, rmx_rtt);
707 setmetric(RTV_RTTVAR, rmx_rttvar);
708 setmetric(RTV_HOPCOUNT, rmx_hopcount);
709 setmetric(RTV_MTU, rmx_mtu);
710 setmetric(RTV_EXPIRE, rmx_expire);
715 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
718 * Extract the addresses of the passed sockaddrs.
719 * Do a little sanity checking so as to avoid bad memory references.
720 * This data is derived straight from userland.
723 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
728 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
729 if ((rtinfo->rti_addrs & (1 << i)) == 0)
731 sa = (struct sockaddr *)cp;
735 if ((cp + sa->sa_len) > cplim) {
740 * There are no more... Quit now.
741 * If there are more bits, they are in error.
742 * I've seen this. route(1) can evidently generate these.
743 * This causes kernel to core dump.
744 * For compatibility, if we see this, point to a safe address.
746 if (sa->sa_len == 0) {
747 static struct sockaddr sa_zero = {
748 sizeof sa_zero, AF_INET,
751 rtinfo->rti_info[i] = &sa_zero;
752 kprintf("rtsock: received more addr bits than sockaddrs.\n");
753 return (0); /* should be EINVAL but for compat */
756 /* Accept the sockaddr. */
757 rtinfo->rti_info[i] = sa;
758 cp += ROUNDUP(sa->sa_len);
764 rt_msghdrsize(int type)
769 return sizeof(struct ifa_msghdr);
772 return sizeof(struct ifma_msghdr);
774 return sizeof(struct if_msghdr);
777 return sizeof(struct if_announcemsghdr);
779 return sizeof(struct rt_msghdr);
784 rt_msgsize(int type, struct rt_addrinfo *rtinfo)
788 len = rt_msghdrsize(type);
789 for (i = 0; i < RTAX_MAX; i++) {
790 if (rtinfo->rti_info[i] != NULL)
791 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
798 * Build a routing message in a buffer.
799 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
800 * to the end of the buffer after the message header.
802 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
803 * This side-effect can be avoided if we reorder the addrs bitmask field in all
804 * the route messages to line up so we can set it here instead of back in the
808 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
810 struct rt_msghdr *rtm;
814 rtm = (struct rt_msghdr *) buf;
815 rtm->rtm_version = RTM_VERSION;
816 rtm->rtm_type = type;
817 rtm->rtm_msglen = msglen;
819 cp = (char *)buf + rt_msghdrsize(type);
820 rtinfo->rti_addrs = 0;
821 for (i = 0; i < RTAX_MAX; i++) {
824 if ((sa = rtinfo->rti_info[i]) == NULL)
826 rtinfo->rti_addrs |= (1 << i);
827 dlen = ROUNDUP(sa->sa_len);
834 * Build a routing message in a mbuf chain.
835 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
836 * to the end of the mbuf after the message header.
838 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
839 * This side-effect can be avoided if we reorder the addrs bitmask field in all
840 * the route messages to line up so we can set it here instead of back in the
844 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
847 struct rt_msghdr *rtm;
851 hlen = rt_msghdrsize(type);
852 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
854 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
858 m->m_pkthdr.len = m->m_len = hlen;
859 m->m_pkthdr.rcvif = NULL;
860 rtinfo->rti_addrs = 0;
862 for (i = 0; i < RTAX_MAX; i++) {
866 if ((sa = rtinfo->rti_info[i]) == NULL)
868 rtinfo->rti_addrs |= (1 << i);
869 dlen = ROUNDUP(sa->sa_len);
870 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
873 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
877 rtm = mtod(m, struct rt_msghdr *);
879 rtm->rtm_msglen = len;
880 rtm->rtm_version = RTM_VERSION;
881 rtm->rtm_type = type;
886 * This routine is called to generate a message from the routing
887 * socket indicating that a redirect has occurred, a routing lookup
888 * has failed, or that a protocol has detected timeouts to a particular
892 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
894 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
895 struct rt_msghdr *rtm;
898 if (route_cb.any_count == 0)
900 m = rt_msg_mbuf(type, rtinfo);
903 rtm = mtod(m, struct rt_msghdr *);
904 rtm->rtm_flags = RTF_DONE | flags;
905 rtm->rtm_errno = error;
906 rtm->rtm_addrs = rtinfo->rti_addrs;
907 rts_input(m, familyof(dst));
911 rt_dstmsg(int type, struct sockaddr *dst, int error)
913 struct rt_msghdr *rtm;
914 struct rt_addrinfo addrs;
917 if (route_cb.any_count == 0)
919 bzero(&addrs, sizeof(struct rt_addrinfo));
920 addrs.rti_info[RTAX_DST] = dst;
921 m = rt_msg_mbuf(type, &addrs);
924 rtm = mtod(m, struct rt_msghdr *);
925 rtm->rtm_flags = RTF_DONE;
926 rtm->rtm_errno = error;
927 rtm->rtm_addrs = addrs.rti_addrs;
928 rts_input(m, familyof(dst));
932 * This routine is called to generate a message from the routing
933 * socket indicating that the status of a network interface has changed.
936 rt_ifmsg(struct ifnet *ifp)
938 struct if_msghdr *ifm;
940 struct rt_addrinfo rtinfo;
942 if (route_cb.any_count == 0)
944 bzero(&rtinfo, sizeof(struct rt_addrinfo));
945 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
948 ifm = mtod(m, struct if_msghdr *);
949 ifm->ifm_index = ifp->if_index;
950 ifm->ifm_flags = ifp->if_flags;
951 ifm->ifm_data = ifp->if_data;
957 rt_ifamsg(int cmd, struct ifaddr *ifa)
959 struct ifa_msghdr *ifam;
960 struct rt_addrinfo rtinfo;
962 struct ifnet *ifp = ifa->ifa_ifp;
964 bzero(&rtinfo, sizeof(struct rt_addrinfo));
965 rtinfo.rti_ifaaddr = ifa->ifa_addr;
967 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
968 rtinfo.rti_netmask = ifa->ifa_netmask;
969 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
971 m = rt_msg_mbuf(cmd, &rtinfo);
975 ifam = mtod(m, struct ifa_msghdr *);
976 ifam->ifam_index = ifp->if_index;
977 ifam->ifam_metric = ifa->ifa_metric;
978 ifam->ifam_flags = ifa->ifa_flags;
979 ifam->ifam_addrs = rtinfo.rti_addrs;
981 rts_input(m, familyof(ifa->ifa_addr));
985 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
987 struct rt_msghdr *rtm;
988 struct rt_addrinfo rtinfo;
990 struct sockaddr *dst;
995 bzero(&rtinfo, sizeof(struct rt_addrinfo));
996 rtinfo.rti_dst = dst = rt_key(rt);
997 rtinfo.rti_gateway = rt->rt_gateway;
998 rtinfo.rti_netmask = rt_mask(rt);
1000 rtinfo.rti_ifpaddr =
1001 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1003 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1005 m = rt_msg_mbuf(cmd, &rtinfo);
1009 rtm = mtod(m, struct rt_msghdr *);
1011 rtm->rtm_index = ifp->if_index;
1012 rtm->rtm_flags |= rt->rt_flags;
1013 rtm->rtm_errno = error;
1014 rtm->rtm_addrs = rtinfo.rti_addrs;
1016 rts_input(m, familyof(dst));
1020 * This is called to generate messages from the routing socket
1021 * indicating a network interface has had addresses associated with it.
1022 * if we ever reverse the logic and replace messages TO the routing
1023 * socket indicate a request to configure interfaces, then it will
1024 * be unnecessary as the routing socket will automatically generate
1028 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1032 * notify the SCTP stack
1033 * this will only get called when an address is added/deleted
1034 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1037 sctp_add_ip_address(ifa);
1038 else if (cmd == RTM_DELETE)
1039 sctp_delete_ip_address(ifa);
1042 if (route_cb.any_count == 0)
1045 if (cmd == RTM_ADD) {
1046 rt_ifamsg(RTM_NEWADDR, ifa);
1047 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
1049 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
1050 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
1051 rt_ifamsg(RTM_DELADDR, ifa);
1056 * This is the analogue to the rt_newaddrmsg which performs the same
1057 * function but for multicast group memberhips. This is easier since
1058 * there is no route state to worry about.
1061 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1063 struct rt_addrinfo rtinfo;
1064 struct mbuf *m = NULL;
1065 struct ifnet *ifp = ifma->ifma_ifp;
1066 struct ifma_msghdr *ifmam;
1068 if (route_cb.any_count == 0)
1071 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1072 rtinfo.rti_ifaaddr = ifma->ifma_addr;
1073 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
1074 rtinfo.rti_ifpaddr =
1075 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1078 * If a link-layer address is present, present it as a ``gateway''
1079 * (similarly to how ARP entries, e.g., are presented).
1081 rtinfo.rti_gateway = ifma->ifma_lladdr;
1083 m = rt_msg_mbuf(cmd, &rtinfo);
1087 ifmam = mtod(m, struct ifma_msghdr *);
1088 ifmam->ifmam_index = ifp->if_index;
1089 ifmam->ifmam_addrs = rtinfo.rti_addrs;
1091 rts_input(m, familyof(ifma->ifma_addr));
1094 static struct mbuf *
1095 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1096 struct rt_addrinfo *info)
1098 struct if_announcemsghdr *ifan;
1101 if (route_cb.any_count == 0)
1104 bzero(info, sizeof(*info));
1105 m = rt_msg_mbuf(type, info);
1109 ifan = mtod(m, struct if_announcemsghdr *);
1110 ifan->ifan_index = ifp->if_index;
1111 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
1112 ifan->ifan_what = what;
1117 * This is called to generate routing socket messages indicating
1118 * IEEE80211 wireless events.
1119 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1122 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1124 struct rt_addrinfo info;
1127 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1132 * Append the ieee80211 data. Try to stick it in the
1133 * mbuf containing the ifannounce msg; otherwise allocate
1134 * a new mbuf and append.
1136 * NB: we assume m is a single mbuf.
1138 if (data_len > M_TRAILINGSPACE(m)) {
1139 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA);
1144 bcopy(data, mtod(n, void *), data_len);
1145 n->m_len = data_len;
1147 } else if (data_len > 0) {
1148 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1149 m->m_len += data_len;
1152 if (m->m_flags & M_PKTHDR)
1153 m->m_pkthdr.len += data_len;
1154 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1159 * This is called to generate routing socket messages indicating
1160 * network interface arrival and departure.
1163 rt_ifannouncemsg(struct ifnet *ifp, int what)
1165 struct rt_addrinfo addrinfo;
1168 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo);
1174 resizewalkarg(struct walkarg *w, int len)
1178 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
1181 if (w->w_tmem != NULL)
1182 kfree(w->w_tmem, M_RTABLE);
1184 w->w_tmemsize = len;
1189 * This is used in dumping the kernel table via sysctl().
1192 sysctl_dumpentry(struct radix_node *rn, void *vw)
1194 struct walkarg *w = vw;
1195 struct rtentry *rt = (struct rtentry *)rn;
1196 struct rt_addrinfo rtinfo;
1199 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1202 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1203 rtinfo.rti_dst = rt_key(rt);
1204 rtinfo.rti_gateway = rt->rt_gateway;
1205 rtinfo.rti_netmask = rt_mask(rt);
1206 rtinfo.rti_genmask = rt->rt_genmask;
1207 if (rt->rt_ifp != NULL) {
1208 rtinfo.rti_ifpaddr =
1209 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr;
1210 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
1211 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1212 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
1214 msglen = rt_msgsize(RTM_GET, &rtinfo);
1215 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1217 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1218 if (w->w_req != NULL) {
1219 struct rt_msghdr *rtm = w->w_tmem;
1221 rtm->rtm_flags = rt->rt_flags;
1222 rtm->rtm_use = rt->rt_use;
1223 rtm->rtm_rmx = rt->rt_rmx;
1224 rtm->rtm_index = rt->rt_ifp->if_index;
1225 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1226 rtm->rtm_addrs = rtinfo.rti_addrs;
1227 error = SYSCTL_OUT(w->w_req, rtm, msglen);
1234 sysctl_iflist(int af, struct walkarg *w)
1237 struct rt_addrinfo rtinfo;
1240 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1241 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1242 struct ifaddr_container *ifac;
1245 if (w->w_arg && w->w_arg != ifp->if_index)
1247 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]);
1249 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1250 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1251 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1253 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1254 rtinfo.rti_ifpaddr = NULL;
1255 if (w->w_req != NULL && w->w_tmem != NULL) {
1256 struct if_msghdr *ifm = w->w_tmem;
1258 ifm->ifm_index = ifp->if_index;
1259 ifm->ifm_flags = ifp->if_flags;
1260 ifm->ifm_data = ifp->if_data;
1261 ifm->ifm_addrs = rtinfo.rti_addrs;
1262 error = SYSCTL_OUT(w->w_req, ifm, msglen);
1266 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) {
1269 if (af && af != ifa->ifa_addr->sa_family)
1271 if (curproc->p_ucred->cr_prison &&
1272 prison_if(curproc->p_ucred, ifa->ifa_addr))
1274 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1275 rtinfo.rti_netmask = ifa->ifa_netmask;
1276 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1277 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1278 if (w->w_tmemsize < msglen &&
1279 resizewalkarg(w, msglen) != 0)
1281 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1282 if (w->w_req != NULL) {
1283 struct ifa_msghdr *ifam = w->w_tmem;
1285 ifam->ifam_index = ifa->ifa_ifp->if_index;
1286 ifam->ifam_flags = ifa->ifa_flags;
1287 ifam->ifam_metric = ifa->ifa_metric;
1288 ifam->ifam_addrs = rtinfo.rti_addrs;
1289 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
1294 rtinfo.rti_netmask = NULL;
1295 rtinfo.rti_ifaaddr = NULL;
1296 rtinfo.rti_bcastaddr = NULL;
1302 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1304 int *name = (int *)arg1;
1305 u_int namelen = arg2;
1306 struct radix_node_head *rnh;
1307 int i, error = EINVAL;
1316 if (namelen != 3 && namelen != 4)
1319 bzero(&w, sizeof w);
1325 * Optional third argument specifies cpu, used primarily for
1326 * debugging the route table.
1329 if (name[3] < 0 || name[3] >= ncpus)
1332 lwkt_migratecpu(name[3]);
1340 for (i = 1; i <= AF_MAX; i++)
1341 if ((rnh = rt_tables[mycpuid][i]) &&
1342 (af == 0 || af == i) &&
1343 (error = rnh->rnh_walktree(rnh,
1344 sysctl_dumpentry, &w)))
1349 error = sysctl_iflist(af, &w);
1352 if (w.w_tmem != NULL)
1353 kfree(w.w_tmem, M_RTABLE);
1355 lwkt_migratecpu(origcpu);
1359 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1362 * Definitions of protocols supported in the ROUTE domain.
1365 static struct domain routedomain; /* or at least forward */
1367 static struct protosw routesw[] = {
1368 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1369 0, route_output, raw_ctlinput, 0,
1370 cpu0_soport, cpu0_ctlport,
1376 static struct domain routedomain = {
1377 PF_ROUTE, "route", NULL, NULL, NULL,
1378 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],