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[apple/xnu.git] / bsd / net / rtsock.c
1 /*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22 /*
23 * Copyright (c) 1988, 1991, 1993
24 * The Regents of the University of California. All rights reserved.
25 *
26 * Redistribution and use in source and binary forms, with or without
27 * modification, are permitted provided that the following conditions
28 * are met:
29 * 1. Redistributions of source code must retain the above copyright
30 * notice, this list of conditions and the following disclaimer.
31 * 2. Redistributions in binary form must reproduce the above copyright
32 * notice, this list of conditions and the following disclaimer in the
33 * documentation and/or other materials provided with the distribution.
34 * 3. All advertising materials mentioning features or use of this software
35 * must display the following acknowledgement:
36 * This product includes software developed by the University of
37 * California, Berkeley and its contributors.
38 * 4. Neither the name of the University nor the names of its contributors
39 * may be used to endorse or promote products derived from this software
40 * without specific prior written permission.
41 *
42 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 *
54 * @(#)rtsock.c 8.5 (Berkeley) 11/2/94
55 */
56
57
58 #include <sys/param.h>
59 #include <sys/systm.h>
60 #include <sys/kernel.h>
61 #include <sys/sysctl.h>
62 #include <sys/proc.h>
63 #include <sys/malloc.h>
64 #include <sys/mbuf.h>
65 #include <sys/socket.h>
66 #include <sys/socketvar.h>
67 #include <sys/domain.h>
68 #include <sys/protosw.h>
69 #include <sys/syslog.h>
70 #include <kern/lock.h>
71
72 #include <net/if.h>
73 #include <net/route.h>
74 #include <net/raw_cb.h>
75 #include <netinet/in.h>
76
77 #include <machine/spl.h>
78
79 extern void m_copydata(struct mbuf *, int, int, caddr_t);
80 extern void m_copyback(struct mbuf *, int, int, caddr_t);
81
82 extern struct rtstat rtstat;
83 extern int rttrash;
84
85 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
86
87 extern lck_mtx_t *rt_mtx;
88 static struct sockaddr route_dst = { 2, PF_ROUTE, { 0, } };
89 static struct sockaddr route_src = { 2, PF_ROUTE, { 0, } };
90 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, { 0, } };
91 static struct sockproto route_proto = { PF_ROUTE, 0 };
92
93 struct walkarg {
94 int w_tmemsize;
95 int w_op, w_arg;
96 caddr_t w_tmem;
97 struct sysctl_req *w_req;
98 };
99
100 static struct mbuf *
101 rt_msg1(int, struct rt_addrinfo *);
102 static int rt_msg2(int, struct rt_addrinfo *, caddr_t, struct walkarg *);
103 static int rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *);
104 static int sysctl_dumpentry(struct radix_node *rn, void *vw);
105 static int sysctl_iflist(int af, struct walkarg *w);
106 static int sysctl_iflist2(int af, struct walkarg *w);
107 static int route_output(struct mbuf *, struct socket *);
108 static void rt_setmetrics(u_long, struct rt_metrics *, struct rt_metrics *);
109 static void rt_setif(struct rtentry *, struct sockaddr *, struct sockaddr *,
110 struct sockaddr *);
111
112 /* Sleazy use of local variables throughout file, warning!!!! */
113 #define dst info.rti_info[RTAX_DST]
114 #define gate info.rti_info[RTAX_GATEWAY]
115 #define netmask info.rti_info[RTAX_NETMASK]
116 #define genmask info.rti_info[RTAX_GENMASK]
117 #define ifpaddr info.rti_info[RTAX_IFP]
118 #define ifaaddr info.rti_info[RTAX_IFA]
119 #define brdaddr info.rti_info[RTAX_BRD]
120
121 /*
122 * It really doesn't make any sense at all for this code to share much
123 * with raw_usrreq.c, since its functionality is so restricted. XXX
124 */
125 static int
126 rts_abort(struct socket *so)
127 {
128 int error;
129
130 error = raw_usrreqs.pru_abort(so);
131 return error;
132 }
133
134 /* pru_accept is EOPNOTSUPP */
135
136 static int
137 rts_attach(struct socket *so, int proto, __unused struct proc *p)
138 {
139 struct rawcb *rp;
140 int error;
141
142 if (sotorawcb(so) != 0)
143 return EISCONN; /* XXX panic? */
144 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK); /* XXX */
145 if (rp == 0)
146 return ENOBUFS;
147 bzero(rp, sizeof *rp);
148
149 /*
150 * The splnet() is necessary to block protocols from sending
151 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
152 * this PCB is extant but incompletely initialized.
153 * Probably we should try to do more of this work beforehand and
154 * eliminate the spl.
155 */
156 so->so_pcb = (caddr_t)rp;
157 error = raw_attach(so, proto); /* don't use raw_usrreqs.pru_attach, it checks for SS_PRIV */
158 rp = sotorawcb(so);
159 if (error) {
160 FREE(rp, M_PCB);
161 so->so_pcb = 0;
162 so->so_flags |= SOF_PCBCLEARING;
163 return error;
164 }
165
166 switch(rp->rcb_proto.sp_protocol) {
167 //####LD route_cb needs looking
168 case AF_INET:
169 route_cb.ip_count++;
170 break;
171 case AF_INET6:
172 route_cb.ip6_count++;
173 break;
174 case AF_IPX:
175 route_cb.ipx_count++;
176 break;
177 case AF_NS:
178 route_cb.ns_count++;
179 break;
180 }
181 rp->rcb_faddr = &route_src;
182 route_cb.any_count++;
183 /* the socket is already locked when we enter rts_attach */
184 soisconnected(so);
185 so->so_options |= SO_USELOOPBACK;
186 return 0;
187 }
188
189 static int
190 rts_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
191 {
192 int s, error;
193 s = splnet();
194 error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
195 splx(s);
196 return error;
197 }
198
199 static int
200 rts_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
201 {
202 int s, error;
203 s = splnet();
204 error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
205 splx(s);
206 return error;
207 }
208
209 /* pru_connect2 is EOPNOTSUPP */
210 /* pru_control is EOPNOTSUPP */
211
212 static int
213 rts_detach(struct socket *so)
214 {
215 struct rawcb *rp = sotorawcb(so);
216 int s, error;
217
218 s = splnet();
219 if (rp != 0) {
220 switch(rp->rcb_proto.sp_protocol) {
221 case AF_INET:
222 route_cb.ip_count--;
223 break;
224 case AF_INET6:
225 route_cb.ip6_count--;
226 break;
227 case AF_IPX:
228 route_cb.ipx_count--;
229 break;
230 case AF_NS:
231 route_cb.ns_count--;
232 break;
233 }
234 route_cb.any_count--;
235 }
236 error = raw_usrreqs.pru_detach(so);
237 splx(s);
238 return error;
239 }
240
241 static int
242 rts_disconnect(struct socket *so)
243 {
244 int s, error;
245 s = splnet();
246 error = raw_usrreqs.pru_disconnect(so);
247 splx(s);
248 return error;
249 }
250
251 /* pru_listen is EOPNOTSUPP */
252
253 static int
254 rts_peeraddr(struct socket *so, struct sockaddr **nam)
255 {
256 int s, error;
257 s = splnet();
258 error = raw_usrreqs.pru_peeraddr(so, nam);
259 splx(s);
260 return error;
261 }
262
263 /* pru_rcvd is EOPNOTSUPP */
264 /* pru_rcvoob is EOPNOTSUPP */
265
266 static int
267 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
268 struct mbuf *control, struct proc *p)
269 {
270 int s, error;
271 s = splnet();
272 error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
273 splx(s);
274 return error;
275 }
276
277 /* pru_sense is null */
278
279 static int
280 rts_shutdown(struct socket *so)
281 {
282 int s, error;
283 s = splnet();
284 error = raw_usrreqs.pru_shutdown(so);
285 splx(s);
286 return error;
287 }
288
289 static int
290 rts_sockaddr(struct socket *so, struct sockaddr **nam)
291 {
292 int s, error;
293 s = splnet();
294 error = raw_usrreqs.pru_sockaddr(so, nam);
295 splx(s);
296 return error;
297 }
298
299 static struct pr_usrreqs route_usrreqs = {
300 rts_abort, pru_accept_notsupp, rts_attach, rts_bind,
301 rts_connect, pru_connect2_notsupp, pru_control_notsupp,
302 rts_detach, rts_disconnect, pru_listen_notsupp, rts_peeraddr,
303 pru_rcvd_notsupp, pru_rcvoob_notsupp, rts_send, pru_sense_null,
304 rts_shutdown, rts_sockaddr, sosend, soreceive, pru_sopoll_notsupp
305 };
306
307 /*ARGSUSED*/
308 static int
309 route_output(m, so)
310 struct mbuf *m;
311 struct socket *so;
312 {
313 struct rt_msghdr *rtm = 0;
314 struct rtentry *rt = 0;
315 struct rtentry *saved_nrt = 0;
316 struct radix_node_head *rnh;
317 struct rt_addrinfo info;
318 int len, error = 0;
319 struct ifnet *ifp = 0;
320 #ifndef __APPLE__
321 struct proc *curproc = current_proc();
322 #endif
323 int sendonlytoself = 0;
324
325 #define senderr(e) { error = e; goto flush;}
326 if (m == 0 || ((m->m_len < sizeof(long)) && (m = m_pullup(m, sizeof(long))) == 0))
327 return (ENOBUFS);
328 if ((m->m_flags & M_PKTHDR) == 0)
329 panic("route_output");
330
331 /* unlock the socket (but keep a reference) it won't be accessed until raw_input appends to it. */
332 socket_unlock(so, 0);
333 lck_mtx_lock(rt_mtx);
334
335 len = m->m_pkthdr.len;
336 if (len < sizeof(*rtm) ||
337 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
338 dst = 0;
339 senderr(EINVAL);
340 }
341 R_Malloc(rtm, struct rt_msghdr *, len);
342 if (rtm == 0) {
343 dst = 0;
344 senderr(ENOBUFS);
345 }
346 m_copydata(m, 0, len, (caddr_t)rtm);
347 if (rtm->rtm_version != RTM_VERSION) {
348 dst = 0;
349 senderr(EPROTONOSUPPORT);
350 }
351
352 /*
353 * Silent version of RTM_GET for Reachabiltiy APIs. We may change
354 * all RTM_GETs to be silent in the future, so this is private for now.
355 */
356 if (rtm->rtm_type == RTM_GET_SILENT) {
357 if ((so->so_options & SO_USELOOPBACK) == 0)
358 senderr(EINVAL);
359 sendonlytoself = 1;
360 rtm->rtm_type = RTM_GET;
361 }
362
363 /*
364 * Perform permission checking, only privileged sockets
365 * may perform operations other than RTM_GET
366 */
367 if (rtm->rtm_type != RTM_GET && (so->so_state & SS_PRIV) == 0) {
368 dst = 0;
369 senderr(EPERM);
370 }
371
372 rtm->rtm_pid = proc_selfpid();
373 info.rti_addrs = rtm->rtm_addrs;
374 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
375 dst = 0;
376 senderr(EINVAL);
377 }
378 if (dst == 0 || (dst->sa_family >= AF_MAX)
379 || (gate != 0 && (gate->sa_family >= AF_MAX))) {
380 senderr(EINVAL);
381 }
382 if (genmask) {
383 struct radix_node *t;
384 t = rn_addmask((caddr_t)genmask, 0, 1);
385 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
386 genmask = (struct sockaddr *)(t->rn_key);
387 else
388 senderr(ENOBUFS);
389 }
390 switch (rtm->rtm_type) {
391
392 case RTM_ADD:
393 if (gate == 0)
394 senderr(EINVAL);
395
396 #ifdef __APPLE__
397 /* XXX LD11JUL02 Special case for AOL 5.1.2 connectivity issue to AirPort BS (Radar 2969954)
398 * AOL is adding a circular route ("10.0.1.1/32 10.0.1.1") when establishing its ppp tunnel
399 * to the AP BaseStation by removing the default gateway and replacing it with their tunnel entry point.
400 * There is no apparent reason to add this route as there is a valid 10.0.1.1/24 route to the BS.
401 * That circular route was ignored on previous version of MacOS X because of a routing bug
402 * corrected with the merge to FreeBSD4.4 (a route generated from an RTF_CLONING route had the RTF_WASCLONED
403 * flag set but did not have a reference to the parent route) and that entry was left in the RT. This workaround is
404 * made in order to provide binary compatibility with AOL.
405 * If we catch a process adding a circular route with a /32 from the routing socket, we error it out instead of
406 * confusing the routing table with a wrong route to the previous default gateway
407 */
408 {
409 extern int check_routeselfref;
410 #define satosinaddr(sa) (((struct sockaddr_in *)sa)->sin_addr.s_addr)
411
412 if (check_routeselfref && (dst && dst->sa_family == AF_INET) &&
413 (netmask && satosinaddr(netmask) == INADDR_BROADCAST) &&
414 (gate && satosinaddr(dst) == satosinaddr(gate))) {
415 log(LOG_WARNING, "route_output: circular route %ld.%ld.%ld.%ld/32 ignored\n",
416 (ntohl(satosinaddr(gate)>>24))&0xff,
417 (ntohl(satosinaddr(gate)>>16))&0xff,
418 (ntohl(satosinaddr(gate)>>8))&0xff,
419 (ntohl(satosinaddr(gate)))&0xff);
420
421 senderr(EINVAL);
422 }
423 }
424 #endif
425 error = rtrequest_locked(RTM_ADD, dst, gate, netmask,
426 rtm->rtm_flags, &saved_nrt);
427 if (error == 0 && saved_nrt) {
428 #ifdef __APPLE__
429 /*
430 * If the route request specified an interface with
431 * IFA and/or IFP, we set the requested interface on
432 * the route with rt_setif. It would be much better
433 * to do this inside rtrequest, but that would
434 * require passing the desired interface, in some
435 * form, to rtrequest. Since rtrequest is called in
436 * so many places (roughly 40 in our source), adding
437 * a parameter is to much for us to swallow; this is
438 * something for the FreeBSD developers to tackle.
439 * Instead, we let rtrequest compute whatever
440 * interface it wants, then come in behind it and
441 * stick in the interface that we really want. This
442 * works reasonably well except when rtrequest can't
443 * figure out what interface to use (with
444 * ifa_withroute) and returns ENETUNREACH. Ideally
445 * it shouldn't matter if rtrequest can't figure out
446 * the interface if we're going to explicitly set it
447 * ourselves anyway. But practically we can't
448 * recover here because rtrequest will not do any of
449 * the work necessary to add the route if it can't
450 * find an interface. As long as there is a default
451 * route that leads to some interface, rtrequest will
452 * find an interface, so this problem should be
453 * rarely encountered.
454 * dwiggins@bbn.com
455 */
456
457 rt_setif(saved_nrt, ifpaddr, ifaaddr, gate);
458 #endif
459 rt_setmetrics(rtm->rtm_inits,
460 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
461 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
462 saved_nrt->rt_rmx.rmx_locks |=
463 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
464 rtunref(saved_nrt);
465 saved_nrt->rt_genmask = genmask;
466 }
467 break;
468
469 case RTM_DELETE:
470 error = rtrequest_locked(RTM_DELETE, dst, gate, netmask,
471 rtm->rtm_flags, &saved_nrt);
472 if (error == 0) {
473 if ((rt = saved_nrt))
474 rtref(rt);
475 goto report;
476 }
477 break;
478
479 case RTM_GET:
480 case RTM_CHANGE:
481 case RTM_LOCK:
482 if ((rnh = rt_tables[dst->sa_family]) == 0) {
483 senderr(EAFNOSUPPORT);
484 } else if ((rt = (struct rtentry *)
485 rnh->rnh_lookup(dst, netmask, rnh)) != NULL)
486 rtref(rt);
487 else
488 senderr(ESRCH);
489 switch(rtm->rtm_type) {
490
491 case RTM_GET: {
492 struct ifaddr *ifa2;
493 report:
494 dst = rt_key(rt);
495 gate = rt->rt_gateway;
496 netmask = rt_mask(rt);
497 genmask = rt->rt_genmask;
498 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
499 ifp = rt->rt_ifp;
500 if (ifp) {
501 ifnet_lock_shared(ifp);
502 ifa2 = ifp->if_addrhead.tqh_first;
503 ifpaddr = ifa2->ifa_addr;
504 ifnet_lock_done(ifp);
505 ifaaddr = rt->rt_ifa->ifa_addr;
506 rtm->rtm_index = ifp->if_index;
507 } else {
508 ifpaddr = 0;
509 ifaaddr = 0;
510 }
511 }
512 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
513 (struct walkarg *)0);
514 if (len > rtm->rtm_msglen) {
515 struct rt_msghdr *new_rtm;
516 R_Malloc(new_rtm, struct rt_msghdr *, len);
517 if (new_rtm == 0) {
518 senderr(ENOBUFS);
519 }
520 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
521 R_Free(rtm); rtm = new_rtm;
522 }
523 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
524 (struct walkarg *)0);
525 rtm->rtm_flags = rt->rt_flags;
526 rtm->rtm_rmx = rt->rt_rmx;
527 rtm->rtm_addrs = info.rti_addrs;
528 }
529 break;
530
531 case RTM_CHANGE:
532 if (gate && (error = rt_setgate(rt, rt_key(rt), gate)))
533 senderr(error);
534
535 /*
536 * If they tried to change things but didn't specify
537 * the required gateway, then just use the old one.
538 * This can happen if the user tries to change the
539 * flags on the default route without changing the
540 * default gateway. Changing flags still doesn't work.
541 */
542 if ((rt->rt_flags & RTF_GATEWAY) && !gate)
543 gate = rt->rt_gateway;
544
545 #ifdef __APPLE__
546 /*
547 * On Darwin, we call rt_setif which contains the
548 * equivalent to the code found at this very spot
549 * in BSD.
550 */
551 rt_setif(rt, ifpaddr, ifaaddr, gate);
552 #endif
553
554 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
555 &rt->rt_rmx);
556 #ifndef __APPLE__
557 /* rt_setif, called above does this for us on darwin */
558 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
559 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
560 #endif
561 if (genmask)
562 rt->rt_genmask = genmask;
563 /*
564 * Fall into
565 */
566 case RTM_LOCK:
567 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
568 rt->rt_rmx.rmx_locks |=
569 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
570 break;
571 }
572 break;
573
574 default:
575 senderr(EOPNOTSUPP);
576 }
577 flush:
578 if (rtm) {
579 if (error)
580 rtm->rtm_errno = error;
581 else
582 rtm->rtm_flags |= RTF_DONE;
583 }
584 if (rt)
585 rtfree_locked(rt);
586 lck_mtx_unlock(rt_mtx);
587 socket_lock(so, 0); /* relock the socket now */
588 {
589 struct rawcb *rp = 0;
590 /*
591 * Check to see if we don't want our own messages.
592 */
593 if ((so->so_options & SO_USELOOPBACK) == 0) {
594 if (route_cb.any_count <= 1) {
595 if (rtm)
596 R_Free(rtm);
597 m_freem(m);
598 return (error);
599 }
600 /* There is another listener, so construct message */
601 rp = sotorawcb(so);
602 }
603 if (rtm) {
604 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
605 if (m->m_pkthdr.len < rtm->rtm_msglen) {
606 m_freem(m);
607 m = NULL;
608 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
609 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
610 R_Free(rtm);
611 }
612 if (sendonlytoself && m) {
613 error = 0;
614 if (sbappendaddr(&so->so_rcv, &route_src, m, (struct mbuf*)0, &error) != 0) {
615 sorwakeup(so);
616 }
617 if (error)
618 return error;
619 } else {
620 if (rp)
621 rp->rcb_proto.sp_family = 0; /* Avoid us */
622 if (dst)
623 route_proto.sp_protocol = dst->sa_family;
624 if (m) {
625 socket_unlock(so, 0);
626 raw_input(m, &route_proto, &route_src, &route_dst);
627 socket_lock(so, 0);
628 }
629 if (rp)
630 rp->rcb_proto.sp_family = PF_ROUTE;
631 }
632 }
633 return (error);
634 }
635
636 static void
637 rt_setmetrics(which, in, out)
638 u_long which;
639 struct rt_metrics *in, *out;
640 {
641 #define metric(f, e) if (which & (f)) out->e = in->e;
642 metric(RTV_RPIPE, rmx_recvpipe);
643 metric(RTV_SPIPE, rmx_sendpipe);
644 metric(RTV_SSTHRESH, rmx_ssthresh);
645 metric(RTV_RTT, rmx_rtt);
646 metric(RTV_RTTVAR, rmx_rttvar);
647 metric(RTV_HOPCOUNT, rmx_hopcount);
648 metric(RTV_MTU, rmx_mtu);
649 metric(RTV_EXPIRE, rmx_expire);
650 #undef metric
651 }
652
653 /*
654 * Set route's interface given ifpaddr, ifaaddr, and gateway.
655 */
656 static void
657 rt_setif(
658 struct rtentry *rt,
659 struct sockaddr *Ifpaddr,
660 struct sockaddr *Ifaaddr,
661 struct sockaddr *Gate)
662 {
663 struct ifaddr *ifa = 0;
664 struct ifnet *ifp = 0;
665
666 lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_OWNED);
667
668 /* new gateway could require new ifaddr, ifp;
669 flags may also be different; ifp may be specified
670 by ll sockaddr when protocol address is ambiguous */
671 if (Ifpaddr && (ifa = ifa_ifwithnet(Ifpaddr)) &&
672 (ifp = ifa->ifa_ifp) && (Ifaaddr || Gate)) {
673 ifafree(ifa);
674 ifa = ifaof_ifpforaddr(Ifaaddr ? Ifaaddr : Gate,
675 ifp);
676 }
677 else
678 {
679 if (ifa) {
680 ifafree(ifa);
681 ifa = 0;
682 }
683 if (Ifpaddr && (ifp = if_withname(Ifpaddr)) ) {
684 if (Gate) {
685 ifa = ifaof_ifpforaddr(Gate, ifp);
686 }
687 else {
688 ifnet_lock_shared(ifp);
689 ifa = TAILQ_FIRST(&ifp->if_addrhead);
690 ifaref(ifa);
691 ifnet_lock_done(ifp);
692 }
693 }
694 else if (Ifaaddr && (ifa = ifa_ifwithaddr(Ifaaddr))) {
695 ifp = ifa->ifa_ifp;
696 }
697 else if (Gate && (ifa = ifa_ifwithroute(rt->rt_flags,
698 rt_key(rt), Gate))) {
699 ifp = ifa->ifa_ifp;
700 }
701 }
702 if (ifa) {
703 struct ifaddr *oifa = rt->rt_ifa;
704 if (oifa != ifa) {
705 if (oifa && oifa->ifa_rtrequest)
706 oifa->ifa_rtrequest(RTM_DELETE,
707 rt, Gate);
708 rtsetifa(rt, ifa);
709 rt->rt_ifp = ifp;
710 rt->rt_rmx.rmx_mtu = ifp->if_mtu;
711 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
712 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, Gate);
713 } else {
714 ifafree(ifa);
715 goto call_ifareq;
716 }
717 ifafree(ifa);
718 return;
719 }
720 call_ifareq:
721 /* XXX: to reset gateway to correct value, at RTM_CHANGE */
722 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
723 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, Gate);
724 }
725
726
727 #define ROUNDUP(a) \
728 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
729 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
730
731
732 /*
733 * Extract the addresses of the passed sockaddrs.
734 * Do a little sanity checking so as to avoid bad memory references.
735 * This data is derived straight from userland.
736 */
737 static int
738 rt_xaddrs(cp, cplim, rtinfo)
739 caddr_t cp, cplim;
740 struct rt_addrinfo *rtinfo;
741 {
742 struct sockaddr *sa;
743 int i;
744
745 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
746 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
747 if ((rtinfo->rti_addrs & (1 << i)) == 0)
748 continue;
749 sa = (struct sockaddr *)cp;
750 /*
751 * It won't fit.
752 */
753 if ( (cp + sa->sa_len) > cplim ) {
754 return (EINVAL);
755 }
756
757 /*
758 * there are no more.. quit now
759 * If there are more bits, they are in error.
760 * I've seen this. route(1) can evidently generate these.
761 * This causes kernel to core dump.
762 * for compatibility, If we see this, point to a safe address.
763 */
764 if (sa->sa_len == 0) {
765 rtinfo->rti_info[i] = &sa_zero;
766 return (0); /* should be EINVAL but for compat */
767 }
768
769 /* accept it */
770 rtinfo->rti_info[i] = sa;
771 ADVANCE(cp, sa);
772 }
773 return (0);
774 }
775
776 static struct mbuf *
777 rt_msg1(
778 int type,
779 struct rt_addrinfo *rtinfo)
780 {
781 struct rt_msghdr *rtm;
782 struct mbuf *m;
783 int i;
784 struct sockaddr *sa;
785 int len, dlen;
786
787 switch (type) {
788
789 case RTM_DELADDR:
790 case RTM_NEWADDR:
791 len = sizeof(struct ifa_msghdr);
792 break;
793
794 case RTM_DELMADDR:
795 case RTM_NEWMADDR:
796 len = sizeof(struct ifma_msghdr);
797 break;
798
799 case RTM_IFINFO:
800 len = sizeof(struct if_msghdr);
801 break;
802
803 default:
804 len = sizeof(struct rt_msghdr);
805 }
806 if (len > MCLBYTES)
807 panic("rt_msg1");
808 m = m_gethdr(M_DONTWAIT, MT_DATA);
809 if (m && len > MHLEN) {
810 MCLGET(m, M_DONTWAIT);
811 if ((m->m_flags & M_EXT) == 0) {
812 m_free(m);
813 m = NULL;
814 }
815 }
816 if (m == 0)
817 return (m);
818 m->m_pkthdr.len = m->m_len = len;
819 m->m_pkthdr.rcvif = 0;
820 rtm = mtod(m, struct rt_msghdr *);
821 bzero((caddr_t)rtm, len);
822 for (i = 0; i < RTAX_MAX; i++) {
823 if ((sa = rtinfo->rti_info[i]) == NULL)
824 continue;
825 rtinfo->rti_addrs |= (1 << i);
826 dlen = ROUNDUP(sa->sa_len);
827 m_copyback(m, len, dlen, (caddr_t)sa);
828 len += dlen;
829 }
830 if (m->m_pkthdr.len != len) {
831 m_freem(m);
832 return (NULL);
833 }
834 rtm->rtm_msglen = len;
835 rtm->rtm_version = RTM_VERSION;
836 rtm->rtm_type = type;
837 return (m);
838 }
839
840 static int
841 rt_msg2(type, rtinfo, cp, w)
842 int type;
843 struct rt_addrinfo *rtinfo;
844 caddr_t cp;
845 struct walkarg *w;
846 {
847 int i;
848 int len, dlen, second_time = 0;
849 caddr_t cp0;
850
851 rtinfo->rti_addrs = 0;
852 again:
853 switch (type) {
854
855 case RTM_DELADDR:
856 case RTM_NEWADDR:
857 len = sizeof(struct ifa_msghdr);
858 break;
859
860 case RTM_DELMADDR:
861 case RTM_NEWMADDR:
862 len = sizeof(struct ifma_msghdr);
863 break;
864
865 case RTM_IFINFO:
866 len = sizeof(struct if_msghdr);
867 break;
868
869 case RTM_IFINFO2:
870 len = sizeof(struct if_msghdr2);
871 break;
872
873 case RTM_NEWMADDR2:
874 len = sizeof(struct ifma_msghdr2);
875 break;
876
877 case RTM_GET2:
878 len = sizeof(struct rt_msghdr2);
879 break;
880
881 default:
882 len = sizeof(struct rt_msghdr);
883 }
884 cp0 = cp;
885 if (cp0)
886 cp += len;
887 for (i = 0; i < RTAX_MAX; i++) {
888 struct sockaddr *sa;
889
890 if ((sa = rtinfo->rti_info[i]) == 0)
891 continue;
892 rtinfo->rti_addrs |= (1 << i);
893 dlen = ROUNDUP(sa->sa_len);
894 if (cp) {
895 bcopy((caddr_t)sa, cp, (unsigned)dlen);
896 cp += dlen;
897 }
898 len += dlen;
899 }
900 if (cp == 0 && w != NULL && !second_time) {
901 struct walkarg *rw = w;
902
903 if (rw->w_req) {
904 if (rw->w_tmemsize < len) {
905 if (rw->w_tmem)
906 FREE(rw->w_tmem, M_RTABLE);
907 rw->w_tmem = (caddr_t)
908 _MALLOC(len, M_RTABLE, M_WAITOK); /*###LD0412 was NOWAIT */
909 if (rw->w_tmem)
910 rw->w_tmemsize = len;
911 }
912 if (rw->w_tmem) {
913 cp = rw->w_tmem;
914 second_time = 1;
915 goto again;
916 }
917 }
918 }
919 if (cp) {
920 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
921
922 rtm->rtm_version = RTM_VERSION;
923 rtm->rtm_type = type;
924 rtm->rtm_msglen = len;
925 }
926 return (len);
927 }
928
929 /*
930 * This routine is called to generate a message from the routing
931 * socket indicating that a redirect has occurred, a routing lookup
932 * has failed, or that a protocol has detected timeouts to a particular
933 * destination.
934 */
935 void
936 rt_missmsg(type, rtinfo, flags, error)
937 int type, flags, error;
938 struct rt_addrinfo *rtinfo;
939 {
940 struct rt_msghdr *rtm;
941 struct mbuf *m;
942 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
943
944 lck_mtx_assert(rt_mtx, LCK_MTX_ASSERT_OWNED);
945
946 if (route_cb.any_count == 0)
947 return;
948 m = rt_msg1(type, rtinfo);
949 if (m == 0)
950 return;
951 rtm = mtod(m, struct rt_msghdr *);
952 rtm->rtm_flags = RTF_DONE | flags;
953 rtm->rtm_errno = error;
954 rtm->rtm_addrs = rtinfo->rti_addrs;
955 route_proto.sp_protocol = sa ? sa->sa_family : 0;
956 raw_input(m, &route_proto, &route_src, &route_dst);
957 }
958
959 /*
960 * This routine is called to generate a message from the routing
961 * socket indicating that the status of a network interface has changed.
962 */
963 void
964 rt_ifmsg(
965 struct ifnet *ifp)
966 {
967 struct if_msghdr *ifm;
968 struct mbuf *m;
969 struct rt_addrinfo info;
970
971 if (route_cb.any_count == 0)
972 return;
973 bzero((caddr_t)&info, sizeof(info));
974 m = rt_msg1(RTM_IFINFO, &info);
975 if (m == 0)
976 return;
977 ifm = mtod(m, struct if_msghdr *);
978 ifm->ifm_index = ifp->if_index;
979 ifm->ifm_flags = (u_short)ifp->if_flags;
980 if_data_internal_to_if_data(&ifp->if_data, &ifm->ifm_data);
981 ifm->ifm_addrs = 0;
982 route_proto.sp_protocol = 0;
983 raw_input(m, &route_proto, &route_src, &route_dst);
984 }
985
986 /*
987 * This is called to generate messages from the routing socket
988 * indicating a network interface has had addresses associated with it.
989 * if we ever reverse the logic and replace messages TO the routing
990 * socket indicate a request to configure interfaces, then it will
991 * be unnecessary as the routing socket will automatically generate
992 * copies of it.
993 *
994 * Since this is coming from the interface, it is expected that the
995 * interface will be locked.
996 */
997 void
998 rt_newaddrmsg(cmd, ifa, error, rt)
999 int cmd, error;
1000 struct ifaddr *ifa;
1001 struct rtentry *rt;
1002 {
1003 struct rt_addrinfo info;
1004 struct sockaddr *sa = 0;
1005 int pass;
1006 struct mbuf *m = 0;
1007 struct ifnet *ifp = ifa->ifa_ifp;
1008
1009 if (route_cb.any_count == 0)
1010 return;
1011 for (pass = 1; pass < 3; pass++) {
1012 bzero((caddr_t)&info, sizeof(info));
1013 if ((cmd == RTM_ADD && pass == 1) ||
1014 (cmd == RTM_DELETE && pass == 2)) {
1015 struct ifa_msghdr *ifam;
1016 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
1017
1018 ifaaddr = sa = ifa->ifa_addr;
1019 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
1020 netmask = ifa->ifa_netmask;
1021 brdaddr = ifa->ifa_dstaddr;
1022 if ((m = rt_msg1(ncmd, &info)) == NULL)
1023 continue;
1024 ifam = mtod(m, struct ifa_msghdr *);
1025 ifam->ifam_index = ifp->if_index;
1026 ifam->ifam_metric = ifa->ifa_metric;
1027 ifam->ifam_flags = ifa->ifa_flags;
1028 ifam->ifam_addrs = info.rti_addrs;
1029 }
1030 if ((cmd == RTM_ADD && pass == 2) ||
1031 (cmd == RTM_DELETE && pass == 1)) {
1032 struct rt_msghdr *rtm;
1033
1034 if (rt == 0)
1035 continue;
1036 netmask = rt_mask(rt);
1037 dst = sa = rt_key(rt);
1038 gate = rt->rt_gateway;
1039 if ((m = rt_msg1(cmd, &info)) == NULL)
1040 continue;
1041 rtm = mtod(m, struct rt_msghdr *);
1042 rtm->rtm_index = ifp->if_index;
1043 rtm->rtm_flags |= rt->rt_flags;
1044 rtm->rtm_errno = error;
1045 rtm->rtm_addrs = info.rti_addrs;
1046 }
1047 route_proto.sp_protocol = sa ? sa->sa_family : 0;
1048 raw_input(m, &route_proto, &route_src, &route_dst);
1049 }
1050 }
1051
1052 /*
1053 * This is the analogue to the rt_newaddrmsg which performs the same
1054 * function but for multicast group memberhips. This is easier since
1055 * there is no route state to worry about.
1056 */
1057 void
1058 rt_newmaddrmsg(cmd, ifma)
1059 int cmd;
1060 struct ifmultiaddr *ifma;
1061 {
1062 struct rt_addrinfo info;
1063 struct mbuf *m = 0;
1064 struct ifnet *ifp = ifma->ifma_ifp;
1065 struct ifma_msghdr *ifmam;
1066
1067 if (route_cb.any_count == 0)
1068 return;
1069
1070 bzero((caddr_t)&info, sizeof(info));
1071 ifaaddr = ifma->ifma_addr;
1072 if (ifp && ifp->if_addrhead.tqh_first)
1073 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
1074 else
1075 ifpaddr = NULL;
1076 /*
1077 * If a link-layer address is present, present it as a ``gateway''
1078 * (similarly to how ARP entries, e.g., are presented).
1079 */
1080 gate = ifma->ifma_ll->ifma_addr;
1081 if ((m = rt_msg1(cmd, &info)) == NULL)
1082 return;
1083 ifmam = mtod(m, struct ifma_msghdr *);
1084 ifmam->ifmam_index = ifp ? ifp->if_index : 0;
1085 ifmam->ifmam_addrs = info.rti_addrs;
1086 route_proto.sp_protocol = ifma->ifma_addr->sa_family;
1087 raw_input(m, &route_proto, &route_src, &route_dst);
1088 }
1089
1090 /*
1091 * This is used in dumping the kernel table via sysctl().
1092 */
1093 int
1094 sysctl_dumpentry(rn, vw)
1095 struct radix_node *rn;
1096 void *vw;
1097 {
1098 struct walkarg *w = vw;
1099 struct rtentry *rt = (struct rtentry *)rn;
1100 int error = 0, size;
1101 struct rt_addrinfo info;
1102
1103 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1104 return 0;
1105 bzero((caddr_t)&info, sizeof(info));
1106 dst = rt_key(rt);
1107 gate = rt->rt_gateway;
1108 netmask = rt_mask(rt);
1109 genmask = rt->rt_genmask;
1110 if (w->w_op != NET_RT_DUMP2) {
1111 size = rt_msg2(RTM_GET, &info, 0, w);
1112 if (w->w_req && w->w_tmem) {
1113 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1114
1115 rtm->rtm_flags = rt->rt_flags;
1116 rtm->rtm_use = rt->rt_use;
1117 rtm->rtm_rmx = rt->rt_rmx;
1118 rtm->rtm_index = rt->rt_ifp->if_index;
1119 rtm->rtm_pid = 0;
1120 rtm->rtm_seq = 0;
1121 rtm->rtm_errno = 0;
1122 rtm->rtm_addrs = info.rti_addrs;
1123 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1124 return (error);
1125 }
1126 } else {
1127 size = rt_msg2(RTM_GET2, &info, 0, w);
1128 if (w->w_req && w->w_tmem) {
1129 struct rt_msghdr2 *rtm = (struct rt_msghdr2 *)w->w_tmem;
1130
1131 rtm->rtm_flags = rt->rt_flags;
1132 rtm->rtm_use = rt->rt_use;
1133 rtm->rtm_rmx = rt->rt_rmx;
1134 rtm->rtm_index = rt->rt_ifp->if_index;
1135 rtm->rtm_refcnt = rt->rt_refcnt;
1136 if (rt->rt_parent)
1137 rtm->rtm_parentflags = rt->rt_parent->rt_flags;
1138 else
1139 rtm->rtm_parentflags = 0;
1140 rtm->rtm_reserved = 0;
1141 rtm->rtm_addrs = info.rti_addrs;
1142 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1143 return (error);
1144
1145 }
1146 }
1147 return (error);
1148 }
1149
1150 int
1151 sysctl_iflist(
1152 int af,
1153 struct walkarg *w)
1154 {
1155 struct ifnet *ifp;
1156 struct ifaddr *ifa;
1157 struct rt_addrinfo info;
1158 int len, error = 0;
1159
1160 bzero((caddr_t)&info, sizeof(info));
1161 ifnet_head_lock_shared();
1162 TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
1163 if (error)
1164 break;
1165 if (w->w_arg && w->w_arg != ifp->if_index)
1166 continue;
1167 ifnet_lock_shared(ifp);
1168 ifa = ifp->if_addrhead.tqh_first;
1169 ifpaddr = ifa->ifa_addr;
1170 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
1171 ifpaddr = 0;
1172 if (w->w_req && w->w_tmem) {
1173 struct if_msghdr *ifm;
1174
1175 ifm = (struct if_msghdr *)w->w_tmem;
1176 ifm->ifm_index = ifp->if_index;
1177 ifm->ifm_flags = (u_short)ifp->if_flags;
1178 if_data_internal_to_if_data(&ifp->if_data, &ifm->ifm_data);
1179 ifm->ifm_addrs = info.rti_addrs;
1180 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
1181 if (error) {
1182 ifnet_lock_done(ifp);
1183 break;
1184 }
1185 }
1186 while ((ifa = ifa->ifa_link.tqe_next) != 0) {
1187 if (af && af != ifa->ifa_addr->sa_family)
1188 continue;
1189 #ifndef __APPLE__
1190 if (curproc->p_prison && prison_if(curproc, ifa->ifa_addr))
1191 continue;
1192 #endif
1193 ifaaddr = ifa->ifa_addr;
1194 netmask = ifa->ifa_netmask;
1195 brdaddr = ifa->ifa_dstaddr;
1196 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
1197 if (w->w_req && w->w_tmem) {
1198 struct ifa_msghdr *ifam;
1199
1200 ifam = (struct ifa_msghdr *)w->w_tmem;
1201 ifam->ifam_index = ifa->ifa_ifp->if_index;
1202 ifam->ifam_flags = ifa->ifa_flags;
1203 ifam->ifam_metric = ifa->ifa_metric;
1204 ifam->ifam_addrs = info.rti_addrs;
1205 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1206 if (error)
1207 break;
1208 }
1209 }
1210 ifnet_lock_done(ifp);
1211 ifaaddr = netmask = brdaddr = 0;
1212 }
1213 ifnet_head_done();
1214 return error;
1215 }
1216
1217 int
1218 sysctl_iflist2(
1219 int af,
1220 struct walkarg *w)
1221 {
1222 struct ifnet *ifp;
1223 struct ifaddr *ifa;
1224 struct rt_addrinfo info;
1225 int len, error = 0;
1226
1227 bzero((caddr_t)&info, sizeof(info));
1228 ifnet_head_lock_shared();
1229 TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
1230 if (error)
1231 break;
1232 if (w->w_arg && w->w_arg != ifp->if_index)
1233 continue;
1234 ifnet_lock_shared(ifp);
1235 ifa = ifp->if_addrhead.tqh_first;
1236 ifpaddr = ifa->ifa_addr;
1237 len = rt_msg2(RTM_IFINFO2, &info, (caddr_t)0, w);
1238 ifpaddr = 0;
1239 if (w->w_req && w->w_tmem) {
1240 struct if_msghdr2 *ifm;
1241
1242 ifm = (struct if_msghdr2 *)w->w_tmem;
1243 ifm->ifm_addrs = info.rti_addrs;
1244 ifm->ifm_flags = (u_short)ifp->if_flags;
1245 ifm->ifm_index = ifp->if_index;
1246 ifm->ifm_snd_len = ifp->if_snd.ifq_len;
1247 ifm->ifm_snd_maxlen = ifp->if_snd.ifq_maxlen;
1248 ifm->ifm_snd_drops = ifp->if_snd.ifq_drops;
1249 ifm->ifm_timer = ifp->if_timer;
1250 if_data_internal_to_if_data64(&ifp->if_data, &ifm->ifm_data);
1251 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1252 if (error) {
1253 ifnet_lock_done(ifp);
1254 break;
1255 }
1256 }
1257 while ((ifa = ifa->ifa_link.tqe_next) != 0) {
1258 if (af && af != ifa->ifa_addr->sa_family)
1259 continue;
1260 ifaaddr = ifa->ifa_addr;
1261 netmask = ifa->ifa_netmask;
1262 brdaddr = ifa->ifa_dstaddr;
1263 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
1264 if (w->w_req && w->w_tmem) {
1265 struct ifa_msghdr *ifam;
1266
1267 ifam = (struct ifa_msghdr *)w->w_tmem;
1268 ifam->ifam_index = ifa->ifa_ifp->if_index;
1269 ifam->ifam_flags = ifa->ifa_flags;
1270 ifam->ifam_metric = ifa->ifa_metric;
1271 ifam->ifam_addrs = info.rti_addrs;
1272 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1273 if (error)
1274 break;
1275 }
1276 }
1277 if (error) {
1278 ifnet_lock_done(ifp);
1279 break;
1280 }
1281 {
1282 struct ifmultiaddr *ifma;
1283
1284 for (ifma = ifp->if_multiaddrs.lh_first; ifma;
1285 ifma = ifma->ifma_link.le_next) {
1286 if (af && af != ifma->ifma_addr->sa_family)
1287 continue;
1288 bzero((caddr_t)&info, sizeof(info));
1289 ifaaddr = ifma->ifma_addr;
1290 if (ifp->if_addrhead.tqh_first)
1291 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
1292 if (ifma->ifma_ll)
1293 gate = ifma->ifma_ll->ifma_addr;
1294 len = rt_msg2(RTM_NEWMADDR2, &info, 0, w);
1295 if (w->w_req && w->w_tmem) {
1296 struct ifma_msghdr2 *ifmam;
1297
1298 ifmam = (struct ifma_msghdr2 *)w->w_tmem;
1299 ifmam->ifmam_addrs = info.rti_addrs;
1300 ifmam->ifmam_flags = 0;
1301 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1302 ifmam->ifmam_refcount = ifma->ifma_refcount;
1303 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1304 if (error)
1305 break;
1306 }
1307 }
1308 }
1309 ifnet_lock_done(ifp);
1310 ifaaddr = netmask = brdaddr = 0;
1311 }
1312 ifnet_head_done();
1313 return error;
1314 }
1315
1316
1317 static int
1318 sysctl_rtstat(struct sysctl_req *req)
1319 {
1320 int error;
1321
1322 error = SYSCTL_OUT(req, &rtstat, sizeof(struct rtstat));
1323 if (error)
1324 return (error);
1325
1326 return 0;
1327 }
1328
1329 static int
1330 sysctl_rttrash(struct sysctl_req *req)
1331 {
1332 int error;
1333
1334 error = SYSCTL_OUT(req, &rttrash, sizeof(rttrash));
1335 if (error)
1336 return (error);
1337
1338 return 0;
1339 }
1340
1341
1342 static int
1343 sysctl_rtsock SYSCTL_HANDLER_ARGS
1344 {
1345 int *name = (int *)arg1;
1346 u_int namelen = arg2;
1347 struct radix_node_head *rnh;
1348 int i, error = EINVAL;
1349 u_char af;
1350 struct walkarg w;
1351
1352 name ++;
1353 namelen--;
1354 if (req->newptr)
1355 return (EPERM);
1356 if (namelen != 3)
1357 return (EINVAL);
1358 af = name[0];
1359 Bzero(&w, sizeof(w));
1360 w.w_op = name[1];
1361 w.w_arg = name[2];
1362 w.w_req = req;
1363
1364 switch (w.w_op) {
1365
1366 case NET_RT_DUMP:
1367 case NET_RT_DUMP2:
1368 case NET_RT_FLAGS:
1369 lck_mtx_lock(rt_mtx);
1370 for (i = 1; i <= AF_MAX; i++)
1371 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
1372 (error = rnh->rnh_walktree(rnh,
1373 sysctl_dumpentry, &w)))
1374 break;
1375 lck_mtx_unlock(rt_mtx);
1376 break;
1377 case NET_RT_IFLIST:
1378 error = sysctl_iflist(af, &w);
1379 break;
1380 case NET_RT_IFLIST2:
1381 error = sysctl_iflist2(af, &w);
1382 break;
1383 case NET_RT_STAT:
1384 error = sysctl_rtstat(req);
1385 break;
1386 case NET_RT_TRASH:
1387 error = sysctl_rttrash(req);
1388 break;
1389 }
1390 if (w.w_tmem)
1391 FREE(w.w_tmem, M_RTABLE);
1392 return (error);
1393 }
1394
1395 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1396
1397 /*
1398 * Definitions of protocols supported in the ROUTE domain.
1399 */
1400
1401 struct domain routedomain; /* or at least forward */
1402
1403 static struct protosw routesw[] = {
1404 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1405 0, route_output, raw_ctlinput, 0,
1406 0,
1407 raw_init, 0, 0, 0,
1408 0,
1409 &route_usrreqs,
1410 0, 0, 0,
1411 { 0, 0 }, 0, { 0 }
1412 }
1413 };
1414
1415 struct domain routedomain =
1416 { PF_ROUTE, "route", route_init, 0, 0,
1417 routesw,
1418 0, 0, 0, 0, 0, 0, 0, 0,
1419 { 0, 0 } };
1420
1421 DOMAIN_SET(route);
1422
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