1/*
2 * Copyright (c) 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
34 * $FreeBSD: head/sys/net/rtsock.c 95759 2002-04-30 01:54:54Z tanimura $
35 */
36
37
38#include <sys/param.h>
39#include <sys/domain.h>
40#include <sys/kernel.h>
41#include <sys/jail.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/proc.h>
46#include <sys/protosw.h>
47#include <sys/signalvar.h>
48#include <sys/socket.h>
49#include <sys/socketvar.h>
50#include <sys/sx.h>
51#include <sys/sysctl.h>
52#include <sys/systm.h>
53
54#include <net/if.h>
55#include <net/raw_cb.h>
56#include <net/route.h>
57
58MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
59
60static struct sockaddr route_dst = { 2, PF_ROUTE, };
61static struct sockaddr route_src = { 2, PF_ROUTE, };
62static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
63static struct sockproto route_proto = { PF_ROUTE, };
64
65struct walkarg {
66 int w_tmemsize;
67 int w_op, w_arg;
68 caddr_t w_tmem;
69 struct sysctl_req *w_req;
70};
71
72static struct mbuf *
73 rt_msg1(int, struct rt_addrinfo *);
74static int rt_msg2(int, struct rt_addrinfo *, caddr_t, struct walkarg *);
75static int rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *);
76static int sysctl_dumpentry(struct radix_node *rn, void *vw);
77static int sysctl_iflist(int af, struct walkarg *w);
78static int route_output(struct mbuf *, struct socket *);
79static void rt_setmetrics(u_long, struct rt_metrics *, struct rt_metrics *);
80
81/* Sleazy use of local variables throughout file, warning!!!! */
82#define dst info.rti_info[RTAX_DST]
83#define gate info.rti_info[RTAX_GATEWAY]
84#define netmask info.rti_info[RTAX_NETMASK]
85#define genmask info.rti_info[RTAX_GENMASK]
86#define ifpaddr info.rti_info[RTAX_IFP]
87#define ifaaddr info.rti_info[RTAX_IFA]
88#define brdaddr info.rti_info[RTAX_BRD]
89
90/*
91 * It really doesn't make any sense at all for this code to share much
92 * with raw_usrreq.c, since its functionality is so restricted. XXX
93 */
94static int
95rts_abort(struct socket *so)
96{
97 int s, error;
98 s = splnet();
99 error = raw_usrreqs.pru_abort(so);
100 splx(s);
101 return error;
102}
103
104/* pru_accept is EOPNOTSUPP */
105
106static int
107rts_attach(struct socket *so, int proto, struct thread *td)
108{
109 struct rawcb *rp;
110 int s, error;
111
112 if (sotorawcb(so) != 0)
113 return EISCONN; /* XXX panic? */
114 /* XXX */
115 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
116 if (rp == 0)
117 return ENOBUFS;
118
119 /*
120 * The splnet() is necessary to block protocols from sending
121 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
122 * this PCB is extant but incompletely initialized.
123 * Probably we should try to do more of this work beforehand and
124 * eliminate the spl.
125 */
126 s = splnet();
127 so->so_pcb = (caddr_t)rp;
128 error = raw_attach(so, proto);
129 rp = sotorawcb(so);
130 if (error) {
131 splx(s);
132 so->so_pcb = NULL;
133 free(rp, M_PCB);
134 return error;
135 }
136 switch(rp->rcb_proto.sp_protocol) {
137 case AF_INET:
138 route_cb.ip_count++;
139 break;
140 case AF_INET6:
141 route_cb.ip6_count++;
142 break;
143 case AF_IPX:
144 route_cb.ipx_count++;
145 break;
146 case AF_NS:
147 route_cb.ns_count++;
148 break;
149 }
150 rp->rcb_faddr = &route_src;
151 route_cb.any_count++;
152 SIGIO_SLOCK();
153 soisconnected_locked(so);
154 so->so_options |= SO_USELOOPBACK;
155 SIGIO_SUNLOCK();
156 splx(s);
157 return 0;
158}
159
160static int
161rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
162{
163 int s, error;
164 s = splnet();
165 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
166 splx(s);
167 return error;
168}
169
170static int
171rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
172{
173 int s, error;
174 s = splnet();
175 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
176 splx(s);
177 return error;
178}
179
180/* pru_connect2 is EOPNOTSUPP */
181/* pru_control is EOPNOTSUPP */
182
183static int
184rts_detach(struct socket *so)
185{
186 struct rawcb *rp = sotorawcb(so);
187 int s, error;
188
189 s = splnet();
190 if (rp != 0) {
191 switch(rp->rcb_proto.sp_protocol) {
192 case AF_INET:
193 route_cb.ip_count--;
194 break;
195 case AF_INET6:
196 route_cb.ip6_count--;
197 break;
198 case AF_IPX:
199 route_cb.ipx_count--;
200 break;
201 case AF_NS:
202 route_cb.ns_count--;
203 break;
204 }
205 route_cb.any_count--;
206 }
207 error = raw_usrreqs.pru_detach(so);
208 splx(s);
209 return error;
210}
211
212static int
213rts_disconnect(struct socket *so)
214{
215 int s, error;
216 s = splnet();
217 error = raw_usrreqs.pru_disconnect(so);
218 splx(s);
219 return error;
220}
221
222/* pru_listen is EOPNOTSUPP */
223
224static int
225rts_peeraddr(struct socket *so, struct sockaddr **nam)
226{
227 int s, error;
228 s = splnet();
229 error = raw_usrreqs.pru_peeraddr(so, nam);
230 splx(s);
231 return error;
232}
233
234/* pru_rcvd is EOPNOTSUPP */
235/* pru_rcvoob is EOPNOTSUPP */
236
237static int
238rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
239 struct mbuf *control, struct thread *td)
240{
241 int s, error;
242 s = splnet();
243 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
244 splx(s);
245 return error;
246}
247
248/* pru_sense is null */
249
250static int
251rts_shutdown(struct socket *so)
252{
253 int s, error;
254 s = splnet();
255 error = raw_usrreqs.pru_shutdown(so);
256 splx(s);
257 return error;
258}
259
260static int
261rts_sockaddr(struct socket *so, struct sockaddr **nam)
262{
263 int s, error;
264 s = splnet();
265 error = raw_usrreqs.pru_sockaddr(so, nam);
266 splx(s);
267 return error;
268}
269
270static struct pr_usrreqs route_usrreqs = {
271 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
272 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
273 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
274 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
275 sosend, soreceive, sopoll
276};
277
278/*ARGSUSED*/
279static int
280route_output(m, so)
281 register struct mbuf *m;
282 struct socket *so;
283{
284 register struct rt_msghdr *rtm = 0;
285 register struct rtentry *rt = 0;
286 struct rtentry *saved_nrt = 0;
287 struct radix_node_head *rnh;
288 struct rt_addrinfo info;
289 int len, error = 0;
290 struct ifnet *ifp = 0;
291 struct ifaddr *ifa = 0;
292
293#define senderr(e) { error = e; goto flush;}
294 if (m == 0 || ((m->m_len < sizeof(long)) &&
295 (m = m_pullup(m, sizeof(long))) == 0))
296 return (ENOBUFS);
297 if ((m->m_flags & M_PKTHDR) == 0)
298 panic("route_output");
299 len = m->m_pkthdr.len;
300 if (len < sizeof(*rtm) ||
301 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
302 dst = 0;
303 senderr(EINVAL);
304 }
305 R_Malloc(rtm, struct rt_msghdr *, len);
306 if (rtm == 0) {
307 dst = 0;
308 senderr(ENOBUFS);
309 }
310 m_copydata(m, 0, len, (caddr_t)rtm);
311 if (rtm->rtm_version != RTM_VERSION) {
312 dst = 0;
313 senderr(EPROTONOSUPPORT);
314 }
315 rtm->rtm_pid = curproc->p_pid;
316 bzero(&info, sizeof(info));
317 info.rti_addrs = rtm->rtm_addrs;
318 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
319 dst = 0;
320 senderr(EINVAL);
321 }
322 info.rti_flags = rtm->rtm_flags;
323 if (dst == 0 || (dst->sa_family >= AF_MAX)
324 || (gate != 0 && (gate->sa_family >= AF_MAX)))
325 senderr(EINVAL);
326 if (genmask) {
327 struct radix_node *t;
328 t = rn_addmask((caddr_t)genmask, 0, 1);
329 if (t && Bcmp((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1,
330 *(u_char *)t->rn_key - 1) == 0)
331 genmask = (struct sockaddr *)(t->rn_key);
332 else
333 senderr(ENOBUFS);
334 }
335
336 /*
337 * Verify that the caller has the appropriate privilege; RTM_GET
338 * is the only operation the non-superuser is allowed.
339 */
340 if (rtm->rtm_type != RTM_GET && (error = suser(curthread)) != 0)
341 senderr(error);
342
343 switch (rtm->rtm_type) {
344
345 case RTM_ADD:
346 if (gate == 0)
347 senderr(EINVAL);
348 error = rtrequest1(RTM_ADD, &info, &saved_nrt);
349 if (error == 0 && saved_nrt) {
350 rt_setmetrics(rtm->rtm_inits,
351 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
352 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
353 saved_nrt->rt_rmx.rmx_locks |=
354 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
355 saved_nrt->rt_refcnt--;
356 saved_nrt->rt_genmask = genmask;
357 }
358 break;
359
360 case RTM_DELETE:
361 error = rtrequest1(RTM_DELETE, &info, &saved_nrt);
362 if (error == 0) {
363 if ((rt = saved_nrt))
364 rt->rt_refcnt++;
365 goto report;
366 }
367 break;
368
369 case RTM_GET:
370 case RTM_CHANGE:
371 case RTM_LOCK:
372 if ((rnh = rt_tables[dst->sa_family]) == 0) {
373 senderr(EAFNOSUPPORT);
374 } else if ((rt = (struct rtentry *)
375 rnh->rnh_lookup(dst, netmask, rnh)) != NULL)
376 rt->rt_refcnt++;
377 else
378 senderr(ESRCH);
379 switch(rtm->rtm_type) {
380
381 case RTM_GET:
382 report:
383 dst = rt_key(rt);
384 gate = rt->rt_gateway;
385 netmask = rt_mask(rt);
386 genmask = rt->rt_genmask;
387 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
388 ifp = rt->rt_ifp;
389 if (ifp) {
390 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
391 ifaaddr = rt->rt_ifa->ifa_addr;
392 if (ifp->if_flags & IFF_POINTOPOINT)
393 brdaddr = rt->rt_ifa->ifa_dstaddr;
394 rtm->rtm_index = ifp->if_index;
395 } else {
396 ifpaddr = 0;
397 ifaaddr = 0;
398 }
399 }
400 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
401 (struct walkarg *)0);
402 if (len > rtm->rtm_msglen) {
403 struct rt_msghdr *new_rtm;
404 R_Malloc(new_rtm, struct rt_msghdr *, len);
405 if (new_rtm == 0)
406 senderr(ENOBUFS);
407 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
408 Free(rtm); rtm = new_rtm;
409 }
410 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
411 (struct walkarg *)0);
412 rtm->rtm_flags = rt->rt_flags;
413 rtm->rtm_rmx = rt->rt_rmx;
414 rtm->rtm_addrs = info.rti_addrs;
415 break;
416
417 case RTM_CHANGE:
418 /* new gateway could require new ifaddr, ifp;
419 flags may also be different; ifp may be specified
420 by ll sockaddr when protocol address is ambiguous */
421#define equal(a1, a2) (bcmp((caddr_t)(a1), (caddr_t)(a2), (a1)->sa_len) == 0)
422 if ((rt->rt_flags & RTF_GATEWAY && gate != NULL) ||
423 ifpaddr != NULL ||
424 (ifaaddr != NULL &&
425 !equal(ifaaddr, rt->rt_ifa->ifa_addr))) {
426 if ((error = rt_getifa(&info)) != 0)
427 senderr(error);
428 }
429 if (gate != NULL &&
430 (error = rt_setgate(rt, rt_key(rt), gate)) != 0)
431 senderr(error);
432 if ((ifa = info.rti_ifa) != NULL) {
433 register struct ifaddr *oifa = rt->rt_ifa;
434 if (oifa != ifa) {
435 if (oifa && oifa->ifa_rtrequest)
436 oifa->ifa_rtrequest(RTM_DELETE, rt,
437 &info);
438 IFAFREE(rt->rt_ifa);
439 rt->rt_ifa = ifa;
440 ifa->ifa_refcnt++;
441 rt->rt_ifp = info.rti_ifp;
442 }
443 }
444 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
445 &rt->rt_rmx);
446 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
447 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
448 if (genmask)
449 rt->rt_genmask = genmask;
450 /*
451 * Fall into
452 */
453 case RTM_LOCK:
454 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
455 rt->rt_rmx.rmx_locks |=
456 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
457 break;
458 }
459 break;
460
461 default:
462 senderr(EOPNOTSUPP);
463 }
464
465flush:
466 if (rtm) {
467 if (error)
468 rtm->rtm_errno = error;
469 else
470 rtm->rtm_flags |= RTF_DONE;
471 }
472 if (rt)
473 rtfree(rt);
474 {
475 register struct rawcb *rp = 0;
476 /*
477 * Check to see if we don't want our own messages.
478 */
479 if ((so->so_options & SO_USELOOPBACK) == 0) {
480 if (route_cb.any_count <= 1) {
481 if (rtm)
482 Free(rtm);
483 m_freem(m);
484 return (error);
485 }
486 /* There is another listener, so construct message */
487 rp = sotorawcb(so);
488 }
489 if (rtm) {
490 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
491 if (m->m_pkthdr.len < rtm->rtm_msglen) {
492 m_freem(m);
493 m = NULL;
494 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
495 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
496 Free(rtm);
497 }
498 if (rp)
499 rp->rcb_proto.sp_family = 0; /* Avoid us */
500 if (dst)
501 route_proto.sp_protocol = dst->sa_family;
502 if (m)
503 raw_input(m, &route_proto, &route_src, &route_dst);
504 if (rp)
505 rp->rcb_proto.sp_family = PF_ROUTE;
506 }
507 return (error);
508}
509
510static void
511rt_setmetrics(which, in, out)
512 u_long which;
513 register struct rt_metrics *in, *out;
514{
515#define metric(f, e) if (which & (f)) out->e = in->e;
516 metric(RTV_RPIPE, rmx_recvpipe);
517 metric(RTV_SPIPE, rmx_sendpipe);
518 metric(RTV_SSTHRESH, rmx_ssthresh);
519 metric(RTV_RTT, rmx_rtt);
520 metric(RTV_RTTVAR, rmx_rttvar);
521 metric(RTV_HOPCOUNT, rmx_hopcount);
522 metric(RTV_MTU, rmx_mtu);
523 metric(RTV_EXPIRE, rmx_expire);
524#undef metric
525}
526
527#define ROUNDUP(a) \
528 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
529#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
530
531
532/*
533 * Extract the addresses of the passed sockaddrs.
534 * Do a little sanity checking so as to avoid bad memory references.
535 * This data is derived straight from userland.
536 */
537static int
538rt_xaddrs(cp, cplim, rtinfo)
539 register caddr_t cp, cplim;
540 register struct rt_addrinfo *rtinfo;
541{
542 register struct sockaddr *sa;
543 register int i;
544
545 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
546 if ((rtinfo->rti_addrs & (1 << i)) == 0)
547 continue;
548 sa = (struct sockaddr *)cp;
549 /*
550 * It won't fit.
551 */
552 if ( (cp + sa->sa_len) > cplim ) {
553 return (EINVAL);
554 }
555
556 /*
557 * there are no more.. quit now
558 * If there are more bits, they are in error.
559 * I've seen this. route(1) can evidently generate these.
560 * This causes kernel to core dump.
561 * for compatibility, If we see this, point to a safe address.
562 */
563 if (sa->sa_len == 0) {
564 rtinfo->rti_info[i] = &sa_zero;
565 return (0); /* should be EINVAL but for compat */
566 }
567
568 /* accept it */
569 rtinfo->rti_info[i] = sa;
570 ADVANCE(cp, sa);
571 }
572 return (0);
573}
574
575static struct mbuf *
576rt_msg1(type, rtinfo)
577 int type;
578 register struct rt_addrinfo *rtinfo;
579{
580 register struct rt_msghdr *rtm;
581 register struct mbuf *m;
582 register int i;
583 register struct sockaddr *sa;
584 int len, dlen;
585
586 switch (type) {
587
588 case RTM_DELADDR:
589 case RTM_NEWADDR:
590 len = sizeof(struct ifa_msghdr);
591 break;
592
593 case RTM_DELMADDR:
594 case RTM_NEWMADDR:
595 len = sizeof(struct ifma_msghdr);
596 break;
597
598 case RTM_IFINFO:
599 len = sizeof(struct if_msghdr);
600 break;
601
602 case RTM_IFANNOUNCE:
603 len = sizeof(struct if_announcemsghdr);
604 break;
605
606 default:
607 len = sizeof(struct rt_msghdr);
608 }
609 if (len > MCLBYTES)
610 panic("rt_msg1");
611 m = m_gethdr(M_DONTWAIT, MT_DATA);
612 if (m && len > MHLEN) {
613 MCLGET(m, M_DONTWAIT);
614 if ((m->m_flags & M_EXT) == 0) {
615 m_free(m);
616 m = NULL;
617 }
618 }
619 if (m == 0)
620 return (m);
621 m->m_pkthdr.len = m->m_len = len;
622 m->m_pkthdr.rcvif = 0;
623 rtm = mtod(m, struct rt_msghdr *);
624 bzero((caddr_t)rtm, len);
625 for (i = 0; i < RTAX_MAX; i++) {
626 if ((sa = rtinfo->rti_info[i]) == NULL)
627 continue;
628 rtinfo->rti_addrs |= (1 << i);
629 dlen = ROUNDUP(sa->sa_len);
630 m_copyback(m, len, dlen, (caddr_t)sa);
631 len += dlen;
632 }
633 if (m->m_pkthdr.len != len) {
634 m_freem(m);
635 return (NULL);
636 }
637 rtm->rtm_msglen = len;
638 rtm->rtm_version = RTM_VERSION;
639 rtm->rtm_type = type;
640 return (m);
641}
642
643static int
644rt_msg2(type, rtinfo, cp, w)
645 int type;
646 register struct rt_addrinfo *rtinfo;
647 caddr_t cp;
648 struct walkarg *w;
649{
650 register int i;
651 int len, dlen, second_time = 0;
652 caddr_t cp0;
653
654 rtinfo->rti_addrs = 0;
655again:
656 switch (type) {
657
658 case RTM_DELADDR:
659 case RTM_NEWADDR:
660 len = sizeof(struct ifa_msghdr);
661 break;
662
663 case RTM_IFINFO:
664 len = sizeof(struct if_msghdr);
665 break;
666
667 default:
668 len = sizeof(struct rt_msghdr);
669 }
670 cp0 = cp;
671 if (cp0)
672 cp += len;
673 for (i = 0; i < RTAX_MAX; i++) {
674 register struct sockaddr *sa;
675
676 if ((sa = rtinfo->rti_info[i]) == 0)
677 continue;
678 rtinfo->rti_addrs |= (1 << i);
679 dlen = ROUNDUP(sa->sa_len);
680 if (cp) {
681 bcopy((caddr_t)sa, cp, (unsigned)dlen);
682 cp += dlen;
683 }
684 len += dlen;
685 }
686 len = ALIGN(len);
687 if (cp == 0 && w != NULL && !second_time) {
688 register struct walkarg *rw = w;
689
690 if (rw->w_req) {
691 if (rw->w_tmemsize < len) {
692 if (rw->w_tmem)
693 free(rw->w_tmem, M_RTABLE);
694 rw->w_tmem = (caddr_t)
695 malloc(len, M_RTABLE, M_NOWAIT);
696 if (rw->w_tmem)
697 rw->w_tmemsize = len;
698 }
699 if (rw->w_tmem) {
700 cp = rw->w_tmem;
701 second_time = 1;
702 goto again;
703 }
704 }
705 }
706 if (cp) {
707 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
708
709 rtm->rtm_version = RTM_VERSION;
710 rtm->rtm_type = type;
711 rtm->rtm_msglen = len;
712 }
713 return (len);
714}
715
716/*
717 * This routine is called to generate a message from the routing
718 * socket indicating that a redirect has occured, a routing lookup
719 * has failed, or that a protocol has detected timeouts to a particular
720 * destination.
721 */
722void
723rt_missmsg(type, rtinfo, flags, error)
724 int type, flags, error;
725 register struct rt_addrinfo *rtinfo;
726{
727 register struct rt_msghdr *rtm;
728 register struct mbuf *m;
729 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
730
731 if (route_cb.any_count == 0)
732 return;
733 m = rt_msg1(type, rtinfo);
734 if (m == 0)
735 return;
736 rtm = mtod(m, struct rt_msghdr *);
737 rtm->rtm_flags = RTF_DONE | flags;
738 rtm->rtm_errno = error;
739 rtm->rtm_addrs = rtinfo->rti_addrs;
740 route_proto.sp_protocol = sa ? sa->sa_family : 0;
741 raw_input(m, &route_proto, &route_src, &route_dst);
742}
743
744/*
745 * This routine is called to generate a message from the routing
746 * socket indicating that the status of a network interface has changed.
747 */
748void
749rt_ifmsg(ifp)
750 register struct ifnet *ifp;
751{
752 register struct if_msghdr *ifm;
753 struct mbuf *m;
754 struct rt_addrinfo info;
755
756 if (route_cb.any_count == 0)
757 return;
758 bzero((caddr_t)&info, sizeof(info));
759 m = rt_msg1(RTM_IFINFO, &info);
760 if (m == 0)
761 return;
762 ifm = mtod(m, struct if_msghdr *);
763 ifm->ifm_index = ifp->if_index;
764 ifm->ifm_flags = (u_short)ifp->if_flags;
765 ifm->ifm_data = ifp->if_data;
766 ifm->ifm_addrs = 0;
767 route_proto.sp_protocol = 0;
768 raw_input(m, &route_proto, &route_src, &route_dst);
769}
770
771/*
772 * This is called to generate messages from the routing socket
773 * indicating a network interface has had addresses associated with it.
774 * if we ever reverse the logic and replace messages TO the routing
775 * socket indicate a request to configure interfaces, then it will
776 * be unnecessary as the routing socket will automatically generate
777 * copies of it.
778 */
779void
780rt_newaddrmsg(cmd, ifa, error, rt)
781 int cmd, error;
782 register struct ifaddr *ifa;
783 register struct rtentry *rt;
784{
785 struct rt_addrinfo info;
786 struct sockaddr *sa = 0;
787 int pass;
788 struct mbuf *m = 0;
789 struct ifnet *ifp = ifa->ifa_ifp;
790
791 if (route_cb.any_count == 0)
792 return;
793 for (pass = 1; pass < 3; pass++) {
794 bzero((caddr_t)&info, sizeof(info));
795 if ((cmd == RTM_ADD && pass == 1) ||
796 (cmd == RTM_DELETE && pass == 2)) {
797 register struct ifa_msghdr *ifam;
798 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
799
800 ifaaddr = sa = ifa->ifa_addr;
801 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
802 netmask = ifa->ifa_netmask;
803 brdaddr = ifa->ifa_dstaddr;
804 if ((m = rt_msg1(ncmd, &info)) == NULL)
805 continue;
806 ifam = mtod(m, struct ifa_msghdr *);
807 ifam->ifam_index = ifp->if_index;
808 ifam->ifam_metric = ifa->ifa_metric;
809 ifam->ifam_flags = ifa->ifa_flags;
810 ifam->ifam_addrs = info.rti_addrs;
811 }
812 if ((cmd == RTM_ADD && pass == 2) ||
813 (cmd == RTM_DELETE && pass == 1)) {
814 register struct rt_msghdr *rtm;
815
816 if (rt == 0)
817 continue;
818 netmask = rt_mask(rt);
819 dst = sa = rt_key(rt);
820 gate = rt->rt_gateway;
821 if ((m = rt_msg1(cmd, &info)) == NULL)
822 continue;
823 rtm = mtod(m, struct rt_msghdr *);
824 rtm->rtm_index = ifp->if_index;
825 rtm->rtm_flags |= rt->rt_flags;
826 rtm->rtm_errno = error;
827 rtm->rtm_addrs = info.rti_addrs;
828 }
829 route_proto.sp_protocol = sa ? sa->sa_family : 0;
830 raw_input(m, &route_proto, &route_src, &route_dst);
831 }
832}
833
834/*
835 * This is the analogue to the rt_newaddrmsg which performs the same
836 * function but for multicast group memberhips. This is easier since
837 * there is no route state to worry about.
838 */
839void
840rt_newmaddrmsg(cmd, ifma)
841 int cmd;
842 struct ifmultiaddr *ifma;
843{
844 struct rt_addrinfo info;
845 struct mbuf *m = 0;
846 struct ifnet *ifp = ifma->ifma_ifp;
847 struct ifma_msghdr *ifmam;
848
849 if (route_cb.any_count == 0)
850 return;
851
852 bzero((caddr_t)&info, sizeof(info));
853 ifaaddr = ifma->ifma_addr;
854 if (ifp && TAILQ_FIRST(&ifp->if_addrhead))
855 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
856 else
857 ifpaddr = NULL;
858 /*
859 * If a link-layer address is present, present it as a ``gateway''
860 * (similarly to how ARP entries, e.g., are presented).
861 */
862 gate = ifma->ifma_lladdr;
863 if ((m = rt_msg1(cmd, &info)) == NULL)
864 return;
865 ifmam = mtod(m, struct ifma_msghdr *);
866 ifmam->ifmam_index = ifp->if_index;
867 ifmam->ifmam_addrs = info.rti_addrs;
868 route_proto.sp_protocol = ifma->ifma_addr->sa_family;
869 raw_input(m, &route_proto, &route_src, &route_dst);
870}
871
872/*
873 * This is called to generate routing socket messages indicating
874 * network interface arrival and departure.
875 */
876void
877rt_ifannouncemsg(ifp, what)
878 struct ifnet *ifp;
879 int what;
880{
881 struct if_announcemsghdr *ifan;
882 struct mbuf *m;
883 struct rt_addrinfo info;
884
885 if (route_cb.any_count == 0)
886 return;
887 bzero((caddr_t)&info, sizeof(info));
888 m = rt_msg1(RTM_IFANNOUNCE, &info);
889 if (m == NULL)
890 return;
891 ifan = mtod(m, struct if_announcemsghdr *);
892 ifan->ifan_index = ifp->if_index;
893 snprintf(ifan->ifan_name, sizeof(ifan->ifan_name),
894 "%s%d", ifp->if_name, ifp->if_unit);
895 ifan->ifan_what = what;
896 route_proto.sp_protocol = 0;
897 raw_input(m, &route_proto, &route_src, &route_dst);
898 }
899
900/*
901 * This is used in dumping the kernel table via sysctl().
902 */
903int
904sysctl_dumpentry(rn, vw)
905 struct radix_node *rn;
906 void *vw;
907{
908 register struct walkarg *w = vw;
909 register struct rtentry *rt = (struct rtentry *)rn;
910 int error = 0, size;
911 struct rt_addrinfo info;
912
913 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
914 return 0;
915 bzero((caddr_t)&info, sizeof(info));
916 dst = rt_key(rt);
917 gate = rt->rt_gateway;
918 netmask = rt_mask(rt);
919 genmask = rt->rt_genmask;
920 if (rt->rt_ifp) {
921 ifpaddr = TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
922 ifaaddr = rt->rt_ifa->ifa_addr;
923 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
924 brdaddr = rt->rt_ifa->ifa_dstaddr;
925 }
926 size = rt_msg2(RTM_GET, &info, 0, w);
927 if (w->w_req && w->w_tmem) {
928 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
929
930 rtm->rtm_flags = rt->rt_flags;
931 rtm->rtm_use = rt->rt_use;
932 rtm->rtm_rmx = rt->rt_rmx;
933 rtm->rtm_index = rt->rt_ifp->if_index;
934 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
935 rtm->rtm_addrs = info.rti_addrs;
936 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
937 return (error);
938 }
939 return (error);
940}
941
942int
943sysctl_iflist(af, w)
944 int af;
945 register struct walkarg *w;
946{
947 register struct ifnet *ifp;
948 register struct ifaddr *ifa;
949 struct rt_addrinfo info;
950 int len, error = 0;
951
952 bzero((caddr_t)&info, sizeof(info));
953 TAILQ_FOREACH(ifp, &ifnet, if_link) {
954 if (w->w_arg && w->w_arg != ifp->if_index)
955 continue;
956 ifa = TAILQ_FIRST(&ifp->if_addrhead);
957 ifpaddr = ifa->ifa_addr;
958 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
959 ifpaddr = 0;
960 if (w->w_req && w->w_tmem) {
961 register struct if_msghdr *ifm;
962
963 ifm = (struct if_msghdr *)w->w_tmem;
964 ifm->ifm_index = ifp->if_index;
965 ifm->ifm_flags = (u_short)ifp->if_flags;
966 ifm->ifm_data = ifp->if_data;
967 ifm->ifm_addrs = info.rti_addrs;
968 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
969 if (error)
970 goto done;
971 }
972 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != 0) {
973 if (af && af != ifa->ifa_addr->sa_family)
974 continue;
975 if (jailed(curthread->td_ucred) &&
976 prison_if(curthread->td_ucred, ifa->ifa_addr))
977 continue;
978 ifaaddr = ifa->ifa_addr;
979 netmask = ifa->ifa_netmask;
980 brdaddr = ifa->ifa_dstaddr;
981 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
982 if (w->w_req && w->w_tmem) {
983 register struct ifa_msghdr *ifam;
984
985 ifam = (struct ifa_msghdr *)w->w_tmem;
986 ifam->ifam_index = ifa->ifa_ifp->if_index;
987 ifam->ifam_flags = ifa->ifa_flags;
988 ifam->ifam_metric = ifa->ifa_metric;
989 ifam->ifam_addrs = info.rti_addrs;
990 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
991 if (error)
992 goto done;
993 }
994 }
995 ifaaddr = netmask = brdaddr = 0;
996 }
997done:
998 return (error);
999}
1000
1001static int
1002sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1003{
1004 int *name = (int *)arg1;
1005 u_int namelen = arg2;
1006 register struct radix_node_head *rnh;
1007 int i, s, error = EINVAL;
1008 u_char af;
1009 struct walkarg w;
1010
1011 name ++;
1012 namelen--;
1013 if (req->newptr)
1014 return (EPERM);
1015 if (namelen != 3)
1016 return ((namelen < 3) ? EISDIR : ENOTDIR);
1017 af = name[0];
1018 Bzero(&w, sizeof(w));
1019 w.w_op = name[1];
1020 w.w_arg = name[2];
1021 w.w_req = req;
1022
1023 s = splnet();
1024 switch (w.w_op) {
1025
1026 case NET_RT_DUMP:
1027 case NET_RT_FLAGS:
1028 for (i = 1; i <= AF_MAX; i++)
1029 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
1030 (error = rnh->rnh_walktree(rnh,
1031 sysctl_dumpentry, &w)))
1032 break;
1033 break;
1034
1035 case NET_RT_IFLIST:
1036 error = sysctl_iflist(af, &w);
1037 }
1038 splx(s);
1039 if (w.w_tmem)
1040 free(w.w_tmem, M_RTABLE);
1041 return (error);
1042}
1043
1044SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1045
1046/*
1047 * Definitions of protocols supported in the ROUTE domain.
1048 */
1049
1050extern struct domain routedomain; /* or at least forward */
1051
1052static struct protosw routesw[] = {
1053{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1054 0, route_output, raw_ctlinput, 0,
1055 0,
1056 raw_init, 0, 0, 0,
1057 &route_usrreqs
1058}
1059};
1060
1061static struct domain routedomain =
1062 { PF_ROUTE, "route", 0, 0, 0,
1063 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
1064
1065DOMAIN_SET(route);
2 * Copyright (c) 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
34 * $FreeBSD: head/sys/net/rtsock.c 95759 2002-04-30 01:54:54Z tanimura $
35 */
36
37
38#include <sys/param.h>
39#include <sys/domain.h>
40#include <sys/kernel.h>
41#include <sys/jail.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/proc.h>
46#include <sys/protosw.h>
47#include <sys/signalvar.h>
48#include <sys/socket.h>
49#include <sys/socketvar.h>
50#include <sys/sx.h>
51#include <sys/sysctl.h>
52#include <sys/systm.h>
53
54#include <net/if.h>
55#include <net/raw_cb.h>
56#include <net/route.h>
57
58MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
59
60static struct sockaddr route_dst = { 2, PF_ROUTE, };
61static struct sockaddr route_src = { 2, PF_ROUTE, };
62static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
63static struct sockproto route_proto = { PF_ROUTE, };
64
65struct walkarg {
66 int w_tmemsize;
67 int w_op, w_arg;
68 caddr_t w_tmem;
69 struct sysctl_req *w_req;
70};
71
72static struct mbuf *
73 rt_msg1(int, struct rt_addrinfo *);
74static int rt_msg2(int, struct rt_addrinfo *, caddr_t, struct walkarg *);
75static int rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *);
76static int sysctl_dumpentry(struct radix_node *rn, void *vw);
77static int sysctl_iflist(int af, struct walkarg *w);
78static int route_output(struct mbuf *, struct socket *);
79static void rt_setmetrics(u_long, struct rt_metrics *, struct rt_metrics *);
80
81/* Sleazy use of local variables throughout file, warning!!!! */
82#define dst info.rti_info[RTAX_DST]
83#define gate info.rti_info[RTAX_GATEWAY]
84#define netmask info.rti_info[RTAX_NETMASK]
85#define genmask info.rti_info[RTAX_GENMASK]
86#define ifpaddr info.rti_info[RTAX_IFP]
87#define ifaaddr info.rti_info[RTAX_IFA]
88#define brdaddr info.rti_info[RTAX_BRD]
89
90/*
91 * It really doesn't make any sense at all for this code to share much
92 * with raw_usrreq.c, since its functionality is so restricted. XXX
93 */
94static int
95rts_abort(struct socket *so)
96{
97 int s, error;
98 s = splnet();
99 error = raw_usrreqs.pru_abort(so);
100 splx(s);
101 return error;
102}
103
104/* pru_accept is EOPNOTSUPP */
105
106static int
107rts_attach(struct socket *so, int proto, struct thread *td)
108{
109 struct rawcb *rp;
110 int s, error;
111
112 if (sotorawcb(so) != 0)
113 return EISCONN; /* XXX panic? */
114 /* XXX */
115 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
116 if (rp == 0)
117 return ENOBUFS;
118
119 /*
120 * The splnet() is necessary to block protocols from sending
121 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
122 * this PCB is extant but incompletely initialized.
123 * Probably we should try to do more of this work beforehand and
124 * eliminate the spl.
125 */
126 s = splnet();
127 so->so_pcb = (caddr_t)rp;
128 error = raw_attach(so, proto);
129 rp = sotorawcb(so);
130 if (error) {
131 splx(s);
132 so->so_pcb = NULL;
133 free(rp, M_PCB);
134 return error;
135 }
136 switch(rp->rcb_proto.sp_protocol) {
137 case AF_INET:
138 route_cb.ip_count++;
139 break;
140 case AF_INET6:
141 route_cb.ip6_count++;
142 break;
143 case AF_IPX:
144 route_cb.ipx_count++;
145 break;
146 case AF_NS:
147 route_cb.ns_count++;
148 break;
149 }
150 rp->rcb_faddr = &route_src;
151 route_cb.any_count++;
152 SIGIO_SLOCK();
153 soisconnected_locked(so);
154 so->so_options |= SO_USELOOPBACK;
155 SIGIO_SUNLOCK();
156 splx(s);
157 return 0;
158}
159
160static int
161rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
162{
163 int s, error;
164 s = splnet();
165 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
166 splx(s);
167 return error;
168}
169
170static int
171rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
172{
173 int s, error;
174 s = splnet();
175 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
176 splx(s);
177 return error;
178}
179
180/* pru_connect2 is EOPNOTSUPP */
181/* pru_control is EOPNOTSUPP */
182
183static int
184rts_detach(struct socket *so)
185{
186 struct rawcb *rp = sotorawcb(so);
187 int s, error;
188
189 s = splnet();
190 if (rp != 0) {
191 switch(rp->rcb_proto.sp_protocol) {
192 case AF_INET:
193 route_cb.ip_count--;
194 break;
195 case AF_INET6:
196 route_cb.ip6_count--;
197 break;
198 case AF_IPX:
199 route_cb.ipx_count--;
200 break;
201 case AF_NS:
202 route_cb.ns_count--;
203 break;
204 }
205 route_cb.any_count--;
206 }
207 error = raw_usrreqs.pru_detach(so);
208 splx(s);
209 return error;
210}
211
212static int
213rts_disconnect(struct socket *so)
214{
215 int s, error;
216 s = splnet();
217 error = raw_usrreqs.pru_disconnect(so);
218 splx(s);
219 return error;
220}
221
222/* pru_listen is EOPNOTSUPP */
223
224static int
225rts_peeraddr(struct socket *so, struct sockaddr **nam)
226{
227 int s, error;
228 s = splnet();
229 error = raw_usrreqs.pru_peeraddr(so, nam);
230 splx(s);
231 return error;
232}
233
234/* pru_rcvd is EOPNOTSUPP */
235/* pru_rcvoob is EOPNOTSUPP */
236
237static int
238rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
239 struct mbuf *control, struct thread *td)
240{
241 int s, error;
242 s = splnet();
243 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
244 splx(s);
245 return error;
246}
247
248/* pru_sense is null */
249
250static int
251rts_shutdown(struct socket *so)
252{
253 int s, error;
254 s = splnet();
255 error = raw_usrreqs.pru_shutdown(so);
256 splx(s);
257 return error;
258}
259
260static int
261rts_sockaddr(struct socket *so, struct sockaddr **nam)
262{
263 int s, error;
264 s = splnet();
265 error = raw_usrreqs.pru_sockaddr(so, nam);
266 splx(s);
267 return error;
268}
269
270static struct pr_usrreqs route_usrreqs = {
271 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
272 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
273 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
274 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
275 sosend, soreceive, sopoll
276};
277
278/*ARGSUSED*/
279static int
280route_output(m, so)
281 register struct mbuf *m;
282 struct socket *so;
283{
284 register struct rt_msghdr *rtm = 0;
285 register struct rtentry *rt = 0;
286 struct rtentry *saved_nrt = 0;
287 struct radix_node_head *rnh;
288 struct rt_addrinfo info;
289 int len, error = 0;
290 struct ifnet *ifp = 0;
291 struct ifaddr *ifa = 0;
292
293#define senderr(e) { error = e; goto flush;}
294 if (m == 0 || ((m->m_len < sizeof(long)) &&
295 (m = m_pullup(m, sizeof(long))) == 0))
296 return (ENOBUFS);
297 if ((m->m_flags & M_PKTHDR) == 0)
298 panic("route_output");
299 len = m->m_pkthdr.len;
300 if (len < sizeof(*rtm) ||
301 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
302 dst = 0;
303 senderr(EINVAL);
304 }
305 R_Malloc(rtm, struct rt_msghdr *, len);
306 if (rtm == 0) {
307 dst = 0;
308 senderr(ENOBUFS);
309 }
310 m_copydata(m, 0, len, (caddr_t)rtm);
311 if (rtm->rtm_version != RTM_VERSION) {
312 dst = 0;
313 senderr(EPROTONOSUPPORT);
314 }
315 rtm->rtm_pid = curproc->p_pid;
316 bzero(&info, sizeof(info));
317 info.rti_addrs = rtm->rtm_addrs;
318 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
319 dst = 0;
320 senderr(EINVAL);
321 }
322 info.rti_flags = rtm->rtm_flags;
323 if (dst == 0 || (dst->sa_family >= AF_MAX)
324 || (gate != 0 && (gate->sa_family >= AF_MAX)))
325 senderr(EINVAL);
326 if (genmask) {
327 struct radix_node *t;
328 t = rn_addmask((caddr_t)genmask, 0, 1);
329 if (t && Bcmp((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1,
330 *(u_char *)t->rn_key - 1) == 0)
331 genmask = (struct sockaddr *)(t->rn_key);
332 else
333 senderr(ENOBUFS);
334 }
335
336 /*
337 * Verify that the caller has the appropriate privilege; RTM_GET
338 * is the only operation the non-superuser is allowed.
339 */
340 if (rtm->rtm_type != RTM_GET && (error = suser(curthread)) != 0)
341 senderr(error);
342
343 switch (rtm->rtm_type) {
344
345 case RTM_ADD:
346 if (gate == 0)
347 senderr(EINVAL);
348 error = rtrequest1(RTM_ADD, &info, &saved_nrt);
349 if (error == 0 && saved_nrt) {
350 rt_setmetrics(rtm->rtm_inits,
351 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
352 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
353 saved_nrt->rt_rmx.rmx_locks |=
354 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
355 saved_nrt->rt_refcnt--;
356 saved_nrt->rt_genmask = genmask;
357 }
358 break;
359
360 case RTM_DELETE:
361 error = rtrequest1(RTM_DELETE, &info, &saved_nrt);
362 if (error == 0) {
363 if ((rt = saved_nrt))
364 rt->rt_refcnt++;
365 goto report;
366 }
367 break;
368
369 case RTM_GET:
370 case RTM_CHANGE:
371 case RTM_LOCK:
372 if ((rnh = rt_tables[dst->sa_family]) == 0) {
373 senderr(EAFNOSUPPORT);
374 } else if ((rt = (struct rtentry *)
375 rnh->rnh_lookup(dst, netmask, rnh)) != NULL)
376 rt->rt_refcnt++;
377 else
378 senderr(ESRCH);
379 switch(rtm->rtm_type) {
380
381 case RTM_GET:
382 report:
383 dst = rt_key(rt);
384 gate = rt->rt_gateway;
385 netmask = rt_mask(rt);
386 genmask = rt->rt_genmask;
387 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
388 ifp = rt->rt_ifp;
389 if (ifp) {
390 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
391 ifaaddr = rt->rt_ifa->ifa_addr;
392 if (ifp->if_flags & IFF_POINTOPOINT)
393 brdaddr = rt->rt_ifa->ifa_dstaddr;
394 rtm->rtm_index = ifp->if_index;
395 } else {
396 ifpaddr = 0;
397 ifaaddr = 0;
398 }
399 }
400 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
401 (struct walkarg *)0);
402 if (len > rtm->rtm_msglen) {
403 struct rt_msghdr *new_rtm;
404 R_Malloc(new_rtm, struct rt_msghdr *, len);
405 if (new_rtm == 0)
406 senderr(ENOBUFS);
407 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
408 Free(rtm); rtm = new_rtm;
409 }
410 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
411 (struct walkarg *)0);
412 rtm->rtm_flags = rt->rt_flags;
413 rtm->rtm_rmx = rt->rt_rmx;
414 rtm->rtm_addrs = info.rti_addrs;
415 break;
416
417 case RTM_CHANGE:
418 /* new gateway could require new ifaddr, ifp;
419 flags may also be different; ifp may be specified
420 by ll sockaddr when protocol address is ambiguous */
421#define equal(a1, a2) (bcmp((caddr_t)(a1), (caddr_t)(a2), (a1)->sa_len) == 0)
422 if ((rt->rt_flags & RTF_GATEWAY && gate != NULL) ||
423 ifpaddr != NULL ||
424 (ifaaddr != NULL &&
425 !equal(ifaaddr, rt->rt_ifa->ifa_addr))) {
426 if ((error = rt_getifa(&info)) != 0)
427 senderr(error);
428 }
429 if (gate != NULL &&
430 (error = rt_setgate(rt, rt_key(rt), gate)) != 0)
431 senderr(error);
432 if ((ifa = info.rti_ifa) != NULL) {
433 register struct ifaddr *oifa = rt->rt_ifa;
434 if (oifa != ifa) {
435 if (oifa && oifa->ifa_rtrequest)
436 oifa->ifa_rtrequest(RTM_DELETE, rt,
437 &info);
438 IFAFREE(rt->rt_ifa);
439 rt->rt_ifa = ifa;
440 ifa->ifa_refcnt++;
441 rt->rt_ifp = info.rti_ifp;
442 }
443 }
444 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
445 &rt->rt_rmx);
446 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
447 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
448 if (genmask)
449 rt->rt_genmask = genmask;
450 /*
451 * Fall into
452 */
453 case RTM_LOCK:
454 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
455 rt->rt_rmx.rmx_locks |=
456 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
457 break;
458 }
459 break;
460
461 default:
462 senderr(EOPNOTSUPP);
463 }
464
465flush:
466 if (rtm) {
467 if (error)
468 rtm->rtm_errno = error;
469 else
470 rtm->rtm_flags |= RTF_DONE;
471 }
472 if (rt)
473 rtfree(rt);
474 {
475 register struct rawcb *rp = 0;
476 /*
477 * Check to see if we don't want our own messages.
478 */
479 if ((so->so_options & SO_USELOOPBACK) == 0) {
480 if (route_cb.any_count <= 1) {
481 if (rtm)
482 Free(rtm);
483 m_freem(m);
484 return (error);
485 }
486 /* There is another listener, so construct message */
487 rp = sotorawcb(so);
488 }
489 if (rtm) {
490 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
491 if (m->m_pkthdr.len < rtm->rtm_msglen) {
492 m_freem(m);
493 m = NULL;
494 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
495 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
496 Free(rtm);
497 }
498 if (rp)
499 rp->rcb_proto.sp_family = 0; /* Avoid us */
500 if (dst)
501 route_proto.sp_protocol = dst->sa_family;
502 if (m)
503 raw_input(m, &route_proto, &route_src, &route_dst);
504 if (rp)
505 rp->rcb_proto.sp_family = PF_ROUTE;
506 }
507 return (error);
508}
509
510static void
511rt_setmetrics(which, in, out)
512 u_long which;
513 register struct rt_metrics *in, *out;
514{
515#define metric(f, e) if (which & (f)) out->e = in->e;
516 metric(RTV_RPIPE, rmx_recvpipe);
517 metric(RTV_SPIPE, rmx_sendpipe);
518 metric(RTV_SSTHRESH, rmx_ssthresh);
519 metric(RTV_RTT, rmx_rtt);
520 metric(RTV_RTTVAR, rmx_rttvar);
521 metric(RTV_HOPCOUNT, rmx_hopcount);
522 metric(RTV_MTU, rmx_mtu);
523 metric(RTV_EXPIRE, rmx_expire);
524#undef metric
525}
526
527#define ROUNDUP(a) \
528 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
529#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
530
531
532/*
533 * Extract the addresses of the passed sockaddrs.
534 * Do a little sanity checking so as to avoid bad memory references.
535 * This data is derived straight from userland.
536 */
537static int
538rt_xaddrs(cp, cplim, rtinfo)
539 register caddr_t cp, cplim;
540 register struct rt_addrinfo *rtinfo;
541{
542 register struct sockaddr *sa;
543 register int i;
544
545 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
546 if ((rtinfo->rti_addrs & (1 << i)) == 0)
547 continue;
548 sa = (struct sockaddr *)cp;
549 /*
550 * It won't fit.
551 */
552 if ( (cp + sa->sa_len) > cplim ) {
553 return (EINVAL);
554 }
555
556 /*
557 * there are no more.. quit now
558 * If there are more bits, they are in error.
559 * I've seen this. route(1) can evidently generate these.
560 * This causes kernel to core dump.
561 * for compatibility, If we see this, point to a safe address.
562 */
563 if (sa->sa_len == 0) {
564 rtinfo->rti_info[i] = &sa_zero;
565 return (0); /* should be EINVAL but for compat */
566 }
567
568 /* accept it */
569 rtinfo->rti_info[i] = sa;
570 ADVANCE(cp, sa);
571 }
572 return (0);
573}
574
575static struct mbuf *
576rt_msg1(type, rtinfo)
577 int type;
578 register struct rt_addrinfo *rtinfo;
579{
580 register struct rt_msghdr *rtm;
581 register struct mbuf *m;
582 register int i;
583 register struct sockaddr *sa;
584 int len, dlen;
585
586 switch (type) {
587
588 case RTM_DELADDR:
589 case RTM_NEWADDR:
590 len = sizeof(struct ifa_msghdr);
591 break;
592
593 case RTM_DELMADDR:
594 case RTM_NEWMADDR:
595 len = sizeof(struct ifma_msghdr);
596 break;
597
598 case RTM_IFINFO:
599 len = sizeof(struct if_msghdr);
600 break;
601
602 case RTM_IFANNOUNCE:
603 len = sizeof(struct if_announcemsghdr);
604 break;
605
606 default:
607 len = sizeof(struct rt_msghdr);
608 }
609 if (len > MCLBYTES)
610 panic("rt_msg1");
611 m = m_gethdr(M_DONTWAIT, MT_DATA);
612 if (m && len > MHLEN) {
613 MCLGET(m, M_DONTWAIT);
614 if ((m->m_flags & M_EXT) == 0) {
615 m_free(m);
616 m = NULL;
617 }
618 }
619 if (m == 0)
620 return (m);
621 m->m_pkthdr.len = m->m_len = len;
622 m->m_pkthdr.rcvif = 0;
623 rtm = mtod(m, struct rt_msghdr *);
624 bzero((caddr_t)rtm, len);
625 for (i = 0; i < RTAX_MAX; i++) {
626 if ((sa = rtinfo->rti_info[i]) == NULL)
627 continue;
628 rtinfo->rti_addrs |= (1 << i);
629 dlen = ROUNDUP(sa->sa_len);
630 m_copyback(m, len, dlen, (caddr_t)sa);
631 len += dlen;
632 }
633 if (m->m_pkthdr.len != len) {
634 m_freem(m);
635 return (NULL);
636 }
637 rtm->rtm_msglen = len;
638 rtm->rtm_version = RTM_VERSION;
639 rtm->rtm_type = type;
640 return (m);
641}
642
643static int
644rt_msg2(type, rtinfo, cp, w)
645 int type;
646 register struct rt_addrinfo *rtinfo;
647 caddr_t cp;
648 struct walkarg *w;
649{
650 register int i;
651 int len, dlen, second_time = 0;
652 caddr_t cp0;
653
654 rtinfo->rti_addrs = 0;
655again:
656 switch (type) {
657
658 case RTM_DELADDR:
659 case RTM_NEWADDR:
660 len = sizeof(struct ifa_msghdr);
661 break;
662
663 case RTM_IFINFO:
664 len = sizeof(struct if_msghdr);
665 break;
666
667 default:
668 len = sizeof(struct rt_msghdr);
669 }
670 cp0 = cp;
671 if (cp0)
672 cp += len;
673 for (i = 0; i < RTAX_MAX; i++) {
674 register struct sockaddr *sa;
675
676 if ((sa = rtinfo->rti_info[i]) == 0)
677 continue;
678 rtinfo->rti_addrs |= (1 << i);
679 dlen = ROUNDUP(sa->sa_len);
680 if (cp) {
681 bcopy((caddr_t)sa, cp, (unsigned)dlen);
682 cp += dlen;
683 }
684 len += dlen;
685 }
686 len = ALIGN(len);
687 if (cp == 0 && w != NULL && !second_time) {
688 register struct walkarg *rw = w;
689
690 if (rw->w_req) {
691 if (rw->w_tmemsize < len) {
692 if (rw->w_tmem)
693 free(rw->w_tmem, M_RTABLE);
694 rw->w_tmem = (caddr_t)
695 malloc(len, M_RTABLE, M_NOWAIT);
696 if (rw->w_tmem)
697 rw->w_tmemsize = len;
698 }
699 if (rw->w_tmem) {
700 cp = rw->w_tmem;
701 second_time = 1;
702 goto again;
703 }
704 }
705 }
706 if (cp) {
707 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
708
709 rtm->rtm_version = RTM_VERSION;
710 rtm->rtm_type = type;
711 rtm->rtm_msglen = len;
712 }
713 return (len);
714}
715
716/*
717 * This routine is called to generate a message from the routing
718 * socket indicating that a redirect has occured, a routing lookup
719 * has failed, or that a protocol has detected timeouts to a particular
720 * destination.
721 */
722void
723rt_missmsg(type, rtinfo, flags, error)
724 int type, flags, error;
725 register struct rt_addrinfo *rtinfo;
726{
727 register struct rt_msghdr *rtm;
728 register struct mbuf *m;
729 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
730
731 if (route_cb.any_count == 0)
732 return;
733 m = rt_msg1(type, rtinfo);
734 if (m == 0)
735 return;
736 rtm = mtod(m, struct rt_msghdr *);
737 rtm->rtm_flags = RTF_DONE | flags;
738 rtm->rtm_errno = error;
739 rtm->rtm_addrs = rtinfo->rti_addrs;
740 route_proto.sp_protocol = sa ? sa->sa_family : 0;
741 raw_input(m, &route_proto, &route_src, &route_dst);
742}
743
744/*
745 * This routine is called to generate a message from the routing
746 * socket indicating that the status of a network interface has changed.
747 */
748void
749rt_ifmsg(ifp)
750 register struct ifnet *ifp;
751{
752 register struct if_msghdr *ifm;
753 struct mbuf *m;
754 struct rt_addrinfo info;
755
756 if (route_cb.any_count == 0)
757 return;
758 bzero((caddr_t)&info, sizeof(info));
759 m = rt_msg1(RTM_IFINFO, &info);
760 if (m == 0)
761 return;
762 ifm = mtod(m, struct if_msghdr *);
763 ifm->ifm_index = ifp->if_index;
764 ifm->ifm_flags = (u_short)ifp->if_flags;
765 ifm->ifm_data = ifp->if_data;
766 ifm->ifm_addrs = 0;
767 route_proto.sp_protocol = 0;
768 raw_input(m, &route_proto, &route_src, &route_dst);
769}
770
771/*
772 * This is called to generate messages from the routing socket
773 * indicating a network interface has had addresses associated with it.
774 * if we ever reverse the logic and replace messages TO the routing
775 * socket indicate a request to configure interfaces, then it will
776 * be unnecessary as the routing socket will automatically generate
777 * copies of it.
778 */
779void
780rt_newaddrmsg(cmd, ifa, error, rt)
781 int cmd, error;
782 register struct ifaddr *ifa;
783 register struct rtentry *rt;
784{
785 struct rt_addrinfo info;
786 struct sockaddr *sa = 0;
787 int pass;
788 struct mbuf *m = 0;
789 struct ifnet *ifp = ifa->ifa_ifp;
790
791 if (route_cb.any_count == 0)
792 return;
793 for (pass = 1; pass < 3; pass++) {
794 bzero((caddr_t)&info, sizeof(info));
795 if ((cmd == RTM_ADD && pass == 1) ||
796 (cmd == RTM_DELETE && pass == 2)) {
797 register struct ifa_msghdr *ifam;
798 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
799
800 ifaaddr = sa = ifa->ifa_addr;
801 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
802 netmask = ifa->ifa_netmask;
803 brdaddr = ifa->ifa_dstaddr;
804 if ((m = rt_msg1(ncmd, &info)) == NULL)
805 continue;
806 ifam = mtod(m, struct ifa_msghdr *);
807 ifam->ifam_index = ifp->if_index;
808 ifam->ifam_metric = ifa->ifa_metric;
809 ifam->ifam_flags = ifa->ifa_flags;
810 ifam->ifam_addrs = info.rti_addrs;
811 }
812 if ((cmd == RTM_ADD && pass == 2) ||
813 (cmd == RTM_DELETE && pass == 1)) {
814 register struct rt_msghdr *rtm;
815
816 if (rt == 0)
817 continue;
818 netmask = rt_mask(rt);
819 dst = sa = rt_key(rt);
820 gate = rt->rt_gateway;
821 if ((m = rt_msg1(cmd, &info)) == NULL)
822 continue;
823 rtm = mtod(m, struct rt_msghdr *);
824 rtm->rtm_index = ifp->if_index;
825 rtm->rtm_flags |= rt->rt_flags;
826 rtm->rtm_errno = error;
827 rtm->rtm_addrs = info.rti_addrs;
828 }
829 route_proto.sp_protocol = sa ? sa->sa_family : 0;
830 raw_input(m, &route_proto, &route_src, &route_dst);
831 }
832}
833
834/*
835 * This is the analogue to the rt_newaddrmsg which performs the same
836 * function but for multicast group memberhips. This is easier since
837 * there is no route state to worry about.
838 */
839void
840rt_newmaddrmsg(cmd, ifma)
841 int cmd;
842 struct ifmultiaddr *ifma;
843{
844 struct rt_addrinfo info;
845 struct mbuf *m = 0;
846 struct ifnet *ifp = ifma->ifma_ifp;
847 struct ifma_msghdr *ifmam;
848
849 if (route_cb.any_count == 0)
850 return;
851
852 bzero((caddr_t)&info, sizeof(info));
853 ifaaddr = ifma->ifma_addr;
854 if (ifp && TAILQ_FIRST(&ifp->if_addrhead))
855 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
856 else
857 ifpaddr = NULL;
858 /*
859 * If a link-layer address is present, present it as a ``gateway''
860 * (similarly to how ARP entries, e.g., are presented).
861 */
862 gate = ifma->ifma_lladdr;
863 if ((m = rt_msg1(cmd, &info)) == NULL)
864 return;
865 ifmam = mtod(m, struct ifma_msghdr *);
866 ifmam->ifmam_index = ifp->if_index;
867 ifmam->ifmam_addrs = info.rti_addrs;
868 route_proto.sp_protocol = ifma->ifma_addr->sa_family;
869 raw_input(m, &route_proto, &route_src, &route_dst);
870}
871
872/*
873 * This is called to generate routing socket messages indicating
874 * network interface arrival and departure.
875 */
876void
877rt_ifannouncemsg(ifp, what)
878 struct ifnet *ifp;
879 int what;
880{
881 struct if_announcemsghdr *ifan;
882 struct mbuf *m;
883 struct rt_addrinfo info;
884
885 if (route_cb.any_count == 0)
886 return;
887 bzero((caddr_t)&info, sizeof(info));
888 m = rt_msg1(RTM_IFANNOUNCE, &info);
889 if (m == NULL)
890 return;
891 ifan = mtod(m, struct if_announcemsghdr *);
892 ifan->ifan_index = ifp->if_index;
893 snprintf(ifan->ifan_name, sizeof(ifan->ifan_name),
894 "%s%d", ifp->if_name, ifp->if_unit);
895 ifan->ifan_what = what;
896 route_proto.sp_protocol = 0;
897 raw_input(m, &route_proto, &route_src, &route_dst);
898 }
899
900/*
901 * This is used in dumping the kernel table via sysctl().
902 */
903int
904sysctl_dumpentry(rn, vw)
905 struct radix_node *rn;
906 void *vw;
907{
908 register struct walkarg *w = vw;
909 register struct rtentry *rt = (struct rtentry *)rn;
910 int error = 0, size;
911 struct rt_addrinfo info;
912
913 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
914 return 0;
915 bzero((caddr_t)&info, sizeof(info));
916 dst = rt_key(rt);
917 gate = rt->rt_gateway;
918 netmask = rt_mask(rt);
919 genmask = rt->rt_genmask;
920 if (rt->rt_ifp) {
921 ifpaddr = TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
922 ifaaddr = rt->rt_ifa->ifa_addr;
923 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
924 brdaddr = rt->rt_ifa->ifa_dstaddr;
925 }
926 size = rt_msg2(RTM_GET, &info, 0, w);
927 if (w->w_req && w->w_tmem) {
928 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
929
930 rtm->rtm_flags = rt->rt_flags;
931 rtm->rtm_use = rt->rt_use;
932 rtm->rtm_rmx = rt->rt_rmx;
933 rtm->rtm_index = rt->rt_ifp->if_index;
934 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
935 rtm->rtm_addrs = info.rti_addrs;
936 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
937 return (error);
938 }
939 return (error);
940}
941
942int
943sysctl_iflist(af, w)
944 int af;
945 register struct walkarg *w;
946{
947 register struct ifnet *ifp;
948 register struct ifaddr *ifa;
949 struct rt_addrinfo info;
950 int len, error = 0;
951
952 bzero((caddr_t)&info, sizeof(info));
953 TAILQ_FOREACH(ifp, &ifnet, if_link) {
954 if (w->w_arg && w->w_arg != ifp->if_index)
955 continue;
956 ifa = TAILQ_FIRST(&ifp->if_addrhead);
957 ifpaddr = ifa->ifa_addr;
958 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
959 ifpaddr = 0;
960 if (w->w_req && w->w_tmem) {
961 register struct if_msghdr *ifm;
962
963 ifm = (struct if_msghdr *)w->w_tmem;
964 ifm->ifm_index = ifp->if_index;
965 ifm->ifm_flags = (u_short)ifp->if_flags;
966 ifm->ifm_data = ifp->if_data;
967 ifm->ifm_addrs = info.rti_addrs;
968 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
969 if (error)
970 goto done;
971 }
972 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != 0) {
973 if (af && af != ifa->ifa_addr->sa_family)
974 continue;
975 if (jailed(curthread->td_ucred) &&
976 prison_if(curthread->td_ucred, ifa->ifa_addr))
977 continue;
978 ifaaddr = ifa->ifa_addr;
979 netmask = ifa->ifa_netmask;
980 brdaddr = ifa->ifa_dstaddr;
981 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
982 if (w->w_req && w->w_tmem) {
983 register struct ifa_msghdr *ifam;
984
985 ifam = (struct ifa_msghdr *)w->w_tmem;
986 ifam->ifam_index = ifa->ifa_ifp->if_index;
987 ifam->ifam_flags = ifa->ifa_flags;
988 ifam->ifam_metric = ifa->ifa_metric;
989 ifam->ifam_addrs = info.rti_addrs;
990 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
991 if (error)
992 goto done;
993 }
994 }
995 ifaaddr = netmask = brdaddr = 0;
996 }
997done:
998 return (error);
999}
1000
1001static int
1002sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1003{
1004 int *name = (int *)arg1;
1005 u_int namelen = arg2;
1006 register struct radix_node_head *rnh;
1007 int i, s, error = EINVAL;
1008 u_char af;
1009 struct walkarg w;
1010
1011 name ++;
1012 namelen--;
1013 if (req->newptr)
1014 return (EPERM);
1015 if (namelen != 3)
1016 return ((namelen < 3) ? EISDIR : ENOTDIR);
1017 af = name[0];
1018 Bzero(&w, sizeof(w));
1019 w.w_op = name[1];
1020 w.w_arg = name[2];
1021 w.w_req = req;
1022
1023 s = splnet();
1024 switch (w.w_op) {
1025
1026 case NET_RT_DUMP:
1027 case NET_RT_FLAGS:
1028 for (i = 1; i <= AF_MAX; i++)
1029 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
1030 (error = rnh->rnh_walktree(rnh,
1031 sysctl_dumpentry, &w)))
1032 break;
1033 break;
1034
1035 case NET_RT_IFLIST:
1036 error = sysctl_iflist(af, &w);
1037 }
1038 splx(s);
1039 if (w.w_tmem)
1040 free(w.w_tmem, M_RTABLE);
1041 return (error);
1042}
1043
1044SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1045
1046/*
1047 * Definitions of protocols supported in the ROUTE domain.
1048 */
1049
1050extern struct domain routedomain; /* or at least forward */
1051
1052static struct protosw routesw[] = {
1053{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1054 0, route_output, raw_ctlinput, 0,
1055 0,
1056 raw_init, 0, 0, 0,
1057 &route_usrreqs
1058}
1059};
1060
1061static struct domain routedomain =
1062 { PF_ROUTE, "route", 0, 0, 0,
1063 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
1064
1065DOMAIN_SET(route);