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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
30 * $FreeBSD: stable/9/sys/net/rtsock.c 265715 2014-05-08 20:57:13Z melifaro $
31 */
32 #include "opt_compat.h"
33 #include "opt_mpath.h"
34 #include "opt_inet.h"
35 #include "opt_inet6.h"
36
37 #include <sys/param.h>
38 #include <sys/jail.h>
39 #include <sys/kernel.h>
40 #include <sys/domain.h>
41 #include <sys/lock.h>
42 #include <sys/malloc.h>
43 #include <sys/mbuf.h>
44 #include <sys/priv.h>
45 #include <sys/proc.h>
46 #include <sys/protosw.h>
47 #include <sys/rwlock.h>
48 #include <sys/signalvar.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/sysctl.h>
52 #include <sys/systm.h>
53
54 #include <net/if.h>
55 #include <net/if_dl.h>
56 #include <net/if_llatbl.h>
57 #include <net/if_types.h>
58 #include <net/netisr.h>
59 #include <net/raw_cb.h>
60 #include <net/route.h>
61 #include <net/vnet.h>
62
63 #include <netinet/in.h>
64 #include <netinet/if_ether.h>
65 #ifdef INET6
66 #include <netinet6/scope6_var.h>
67 #endif
68
69 #ifdef COMPAT_FREEBSD32
70 #include <sys/mount.h>
71 #include <compat/freebsd32/freebsd32.h>
72
73 struct if_data32 {
74 uint8_t ifi_type;
75 uint8_t ifi_physical;
76 uint8_t ifi_addrlen;
77 uint8_t ifi_hdrlen;
78 uint8_t ifi_link_state;
79 uint8_t ifi_spare_char1;
80 uint8_t ifi_spare_char2;
81 uint8_t ifi_datalen;
82 uint32_t ifi_mtu;
83 uint32_t ifi_metric;
84 uint32_t ifi_baudrate;
85 uint32_t ifi_ipackets;
86 uint32_t ifi_ierrors;
87 uint32_t ifi_opackets;
88 uint32_t ifi_oerrors;
89 uint32_t ifi_collisions;
90 uint32_t ifi_ibytes;
91 uint32_t ifi_obytes;
92 uint32_t ifi_imcasts;
93 uint32_t ifi_omcasts;
94 uint32_t ifi_iqdrops;
95 uint32_t ifi_noproto;
96 uint32_t ifi_hwassist;
97 int32_t ifi_epoch;
98 struct timeval32 ifi_lastchange;
99 };
100
101 struct if_msghdr32 {
102 uint16_t ifm_msglen;
103 uint8_t ifm_version;
104 uint8_t ifm_type;
105 int32_t ifm_addrs;
106 int32_t ifm_flags;
107 uint16_t ifm_index;
108 struct if_data32 ifm_data;
109 };
110
111 struct if_msghdrl32 {
112 uint16_t ifm_msglen;
113 uint8_t ifm_version;
114 uint8_t ifm_type;
115 int32_t ifm_addrs;
116 int32_t ifm_flags;
117 uint16_t ifm_index;
118 uint16_t _ifm_spare1;
119 uint16_t ifm_len;
120 uint16_t ifm_data_off;
121 struct if_data32 ifm_data;
122 };
123
124 struct ifa_msghdrl32 {
125 uint16_t ifam_msglen;
126 uint8_t ifam_version;
127 uint8_t ifam_type;
128 int32_t ifam_addrs;
129 int32_t ifam_flags;
130 uint16_t ifam_index;
131 uint16_t _ifam_spare1;
132 uint16_t ifam_len;
133 uint16_t ifam_data_off;
134 int32_t ifam_metric;
135 struct if_data32 ifam_data;
136 };
137 #endif /* COMPAT_FREEBSD32 */
138
139 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
140
141 /* NB: these are not modified */
142 static struct sockaddr route_src = { 2, PF_ROUTE, };
143 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
144
145 /*
146 * Used by rtsock/raw_input callback code to decide whether to filter the update
147 * notification to a socket bound to a particular FIB.
148 */
149 #define RTS_FILTER_FIB M_PROTO8
150
151 static struct {
152 int ip_count; /* attached w/ AF_INET */
153 int ip6_count; /* attached w/ AF_INET6 */
154 int ipx_count; /* attached w/ AF_IPX */
155 int any_count; /* total attached */
156 } route_cb;
157
158 struct mtx rtsock_mtx;
159 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
160
161 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx)
162 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
163 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED)
164
165 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
166
167 struct walkarg {
168 int w_tmemsize;
169 int w_op, w_arg;
170 caddr_t w_tmem;
171 struct sysctl_req *w_req;
172 };
173
174 static void rts_input(struct mbuf *m);
175 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo);
176 static int rt_msg2(int type, struct rt_addrinfo *rtinfo,
177 caddr_t cp, struct walkarg *w);
178 static int rt_xaddrs(caddr_t cp, caddr_t cplim,
179 struct rt_addrinfo *rtinfo);
180 static int sysctl_dumpentry(struct radix_node *rn, void *vw);
181 static int sysctl_iflist(int af, struct walkarg *w);
182 static int sysctl_ifmalist(int af, struct walkarg *w);
183 static int route_output(struct mbuf *m, struct socket *so);
184 static void rt_setmetrics(u_long which, const struct rt_metrics *in,
185 struct rt_metrics_lite *out);
186 static void rt_getmetrics(const struct rt_metrics_lite *in,
187 struct rt_metrics *out);
188 static void rt_dispatch(struct mbuf *, sa_family_t);
189
190 static struct netisr_handler rtsock_nh = {
191 .nh_name = "rtsock",
192 .nh_handler = rts_input,
193 .nh_proto = NETISR_ROUTE,
194 .nh_policy = NETISR_POLICY_SOURCE,
195 };
196
197 static int
sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)198 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)
199 {
200 int error, qlimit;
201
202 netisr_getqlimit(&rtsock_nh, &qlimit);
203 error = sysctl_handle_int(oidp, &qlimit, 0, req);
204 if (error || !req->newptr)
205 return (error);
206 if (qlimit < 1)
207 return (EINVAL);
208 return (netisr_setqlimit(&rtsock_nh, qlimit));
209 }
210 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
211 0, 0, sysctl_route_netisr_maxqlen, "I",
212 "maximum routing socket dispatch queue length");
213
214 static void
rts_init(void)215 rts_init(void)
216 {
217 int tmp;
218
219 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
220 rtsock_nh.nh_qlimit = tmp;
221 netisr_register(&rtsock_nh);
222 }
223 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0);
224
225 static int
raw_input_rts_cb(struct mbuf * m,struct sockproto * proto,struct sockaddr * src,struct rawcb * rp)226 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src,
227 struct rawcb *rp)
228 {
229 int fibnum;
230
231 KASSERT(m != NULL, ("%s: m is NULL", __func__));
232 KASSERT(proto != NULL, ("%s: proto is NULL", __func__));
233 KASSERT(rp != NULL, ("%s: rp is NULL", __func__));
234
235 /* No filtering requested. */
236 if ((m->m_flags & RTS_FILTER_FIB) == 0)
237 return (0);
238
239 /* Check if it is a rts and the fib matches the one of the socket. */
240 fibnum = M_GETFIB(m);
241 if (proto->sp_family != PF_ROUTE ||
242 rp->rcb_socket == NULL ||
243 rp->rcb_socket->so_fibnum == fibnum)
244 return (0);
245
246 /* Filtering requested and no match, the socket shall be skipped. */
247 return (1);
248 }
249
250 static void
rts_input(struct mbuf * m)251 rts_input(struct mbuf *m)
252 {
253 struct sockproto route_proto;
254 unsigned short *family;
255 struct m_tag *tag;
256
257 route_proto.sp_family = PF_ROUTE;
258 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
259 if (tag != NULL) {
260 family = (unsigned short *)(tag + 1);
261 route_proto.sp_protocol = *family;
262 m_tag_delete(m, tag);
263 } else
264 route_proto.sp_protocol = 0;
265
266 raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb);
267 }
268
269 /*
270 * It really doesn't make any sense at all for this code to share much
271 * with raw_usrreq.c, since its functionality is so restricted. XXX
272 */
273 static void
rts_abort(struct socket * so)274 rts_abort(struct socket *so)
275 {
276
277 raw_usrreqs.pru_abort(so);
278 }
279
280 static void
rts_close(struct socket * so)281 rts_close(struct socket *so)
282 {
283
284 raw_usrreqs.pru_close(so);
285 }
286
287 /* pru_accept is EOPNOTSUPP */
288
289 static int
rts_attach(struct socket * so,int proto,struct thread * td)290 rts_attach(struct socket *so, int proto, struct thread *td)
291 {
292 struct rawcb *rp;
293 int s, error;
294
295 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
296
297 /* XXX */
298 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
299 if (rp == NULL)
300 return ENOBUFS;
301
302 /*
303 * The splnet() is necessary to block protocols from sending
304 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
305 * this PCB is extant but incompletely initialized.
306 * Probably we should try to do more of this work beforehand and
307 * eliminate the spl.
308 */
309 s = splnet();
310 so->so_pcb = (caddr_t)rp;
311 so->so_fibnum = td->td_proc->p_fibnum;
312 error = raw_attach(so, proto);
313 rp = sotorawcb(so);
314 if (error) {
315 splx(s);
316 so->so_pcb = NULL;
317 free(rp, M_PCB);
318 return error;
319 }
320 RTSOCK_LOCK();
321 switch(rp->rcb_proto.sp_protocol) {
322 case AF_INET:
323 route_cb.ip_count++;
324 break;
325 case AF_INET6:
326 route_cb.ip6_count++;
327 break;
328 case AF_IPX:
329 route_cb.ipx_count++;
330 break;
331 }
332 route_cb.any_count++;
333 RTSOCK_UNLOCK();
334 soisconnected(so);
335 so->so_options |= SO_USELOOPBACK;
336 splx(s);
337 return 0;
338 }
339
340 static int
rts_bind(struct socket * so,struct sockaddr * nam,struct thread * td)341 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
342 {
343
344 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
345 }
346
347 static int
rts_connect(struct socket * so,struct sockaddr * nam,struct thread * td)348 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
349 {
350
351 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
352 }
353
354 /* pru_connect2 is EOPNOTSUPP */
355 /* pru_control is EOPNOTSUPP */
356
357 static void
rts_detach(struct socket * so)358 rts_detach(struct socket *so)
359 {
360 struct rawcb *rp = sotorawcb(so);
361
362 KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
363
364 RTSOCK_LOCK();
365 switch(rp->rcb_proto.sp_protocol) {
366 case AF_INET:
367 route_cb.ip_count--;
368 break;
369 case AF_INET6:
370 route_cb.ip6_count--;
371 break;
372 case AF_IPX:
373 route_cb.ipx_count--;
374 break;
375 }
376 route_cb.any_count--;
377 RTSOCK_UNLOCK();
378 raw_usrreqs.pru_detach(so);
379 }
380
381 static int
rts_disconnect(struct socket * so)382 rts_disconnect(struct socket *so)
383 {
384
385 return (raw_usrreqs.pru_disconnect(so));
386 }
387
388 /* pru_listen is EOPNOTSUPP */
389
390 static int
rts_peeraddr(struct socket * so,struct sockaddr ** nam)391 rts_peeraddr(struct socket *so, struct sockaddr **nam)
392 {
393
394 return (raw_usrreqs.pru_peeraddr(so, nam));
395 }
396
397 /* pru_rcvd is EOPNOTSUPP */
398 /* pru_rcvoob is EOPNOTSUPP */
399
400 static int
rts_send(struct socket * so,int flags,struct mbuf * m,struct sockaddr * nam,struct mbuf * control,struct thread * td)401 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
402 struct mbuf *control, struct thread *td)
403 {
404
405 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
406 }
407
408 /* pru_sense is null */
409
410 static int
rts_shutdown(struct socket * so)411 rts_shutdown(struct socket *so)
412 {
413
414 return (raw_usrreqs.pru_shutdown(so));
415 }
416
417 static int
rts_sockaddr(struct socket * so,struct sockaddr ** nam)418 rts_sockaddr(struct socket *so, struct sockaddr **nam)
419 {
420
421 return (raw_usrreqs.pru_sockaddr(so, nam));
422 }
423
424 static struct pr_usrreqs route_usrreqs = {
425 .pru_abort = rts_abort,
426 .pru_attach = rts_attach,
427 .pru_bind = rts_bind,
428 .pru_connect = rts_connect,
429 .pru_detach = rts_detach,
430 .pru_disconnect = rts_disconnect,
431 .pru_peeraddr = rts_peeraddr,
432 .pru_send = rts_send,
433 .pru_shutdown = rts_shutdown,
434 .pru_sockaddr = rts_sockaddr,
435 .pru_close = rts_close,
436 };
437
438 #ifndef _SOCKADDR_UNION_DEFINED
439 #define _SOCKADDR_UNION_DEFINED
440 /*
441 * The union of all possible address formats we handle.
442 */
443 union sockaddr_union {
444 struct sockaddr sa;
445 struct sockaddr_in sin;
446 struct sockaddr_in6 sin6;
447 };
448 #endif /* _SOCKADDR_UNION_DEFINED */
449
450 static int
rtm_get_jailed(struct rt_addrinfo * info,struct ifnet * ifp,struct rtentry * rt,union sockaddr_union * saun,struct ucred * cred)451 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
452 struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred)
453 {
454
455 /* First, see if the returned address is part of the jail. */
456 if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) {
457 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
458 return (0);
459 }
460
461 switch (info->rti_info[RTAX_DST]->sa_family) {
462 #ifdef INET
463 case AF_INET:
464 {
465 struct in_addr ia;
466 struct ifaddr *ifa;
467 int found;
468
469 found = 0;
470 /*
471 * Try to find an address on the given outgoing interface
472 * that belongs to the jail.
473 */
474 IF_ADDR_RLOCK(ifp);
475 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
476 struct sockaddr *sa;
477 sa = ifa->ifa_addr;
478 if (sa->sa_family != AF_INET)
479 continue;
480 ia = ((struct sockaddr_in *)sa)->sin_addr;
481 if (prison_check_ip4(cred, &ia) == 0) {
482 found = 1;
483 break;
484 }
485 }
486 IF_ADDR_RUNLOCK(ifp);
487 if (!found) {
488 /*
489 * As a last resort return the 'default' jail address.
490 */
491 ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->
492 sin_addr;
493 if (prison_get_ip4(cred, &ia) != 0)
494 return (ESRCH);
495 }
496 bzero(&saun->sin, sizeof(struct sockaddr_in));
497 saun->sin.sin_len = sizeof(struct sockaddr_in);
498 saun->sin.sin_family = AF_INET;
499 saun->sin.sin_addr.s_addr = ia.s_addr;
500 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
501 break;
502 }
503 #endif
504 #ifdef INET6
505 case AF_INET6:
506 {
507 struct in6_addr ia6;
508 struct ifaddr *ifa;
509 int found;
510
511 found = 0;
512 /*
513 * Try to find an address on the given outgoing interface
514 * that belongs to the jail.
515 */
516 IF_ADDR_RLOCK(ifp);
517 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
518 struct sockaddr *sa;
519 sa = ifa->ifa_addr;
520 if (sa->sa_family != AF_INET6)
521 continue;
522 bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
523 &ia6, sizeof(struct in6_addr));
524 if (prison_check_ip6(cred, &ia6) == 0) {
525 found = 1;
526 break;
527 }
528 }
529 IF_ADDR_RUNLOCK(ifp);
530 if (!found) {
531 /*
532 * As a last resort return the 'default' jail address.
533 */
534 ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)->
535 sin6_addr;
536 if (prison_get_ip6(cred, &ia6) != 0)
537 return (ESRCH);
538 }
539 bzero(&saun->sin6, sizeof(struct sockaddr_in6));
540 saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
541 saun->sin6.sin6_family = AF_INET6;
542 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
543 if (sa6_recoverscope(&saun->sin6) != 0)
544 return (ESRCH);
545 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
546 break;
547 }
548 #endif
549 default:
550 return (ESRCH);
551 }
552 return (0);
553 }
554
555 /*ARGSUSED*/
556 static int
route_output(struct mbuf * m,struct socket * so)557 route_output(struct mbuf *m, struct socket *so)
558 {
559 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0)
560 struct rt_msghdr *rtm = NULL;
561 struct rtentry *rt = NULL;
562 struct radix_node_head *rnh;
563 struct rt_addrinfo info;
564 int len, error = 0;
565 struct ifnet *ifp = NULL;
566 union sockaddr_union saun;
567 sa_family_t saf = AF_UNSPEC;
568
569 #define senderr(e) { error = e; goto flush;}
570 if (m == NULL || ((m->m_len < sizeof(long)) &&
571 (m = m_pullup(m, sizeof(long))) == NULL))
572 return (ENOBUFS);
573 if ((m->m_flags & M_PKTHDR) == 0)
574 panic("route_output");
575 len = m->m_pkthdr.len;
576 if (len < sizeof(*rtm) ||
577 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
578 info.rti_info[RTAX_DST] = NULL;
579 senderr(EINVAL);
580 }
581 R_Malloc(rtm, struct rt_msghdr *, len);
582 if (rtm == NULL) {
583 info.rti_info[RTAX_DST] = NULL;
584 senderr(ENOBUFS);
585 }
586 m_copydata(m, 0, len, (caddr_t)rtm);
587 if (rtm->rtm_version != RTM_VERSION) {
588 info.rti_info[RTAX_DST] = NULL;
589 senderr(EPROTONOSUPPORT);
590 }
591 rtm->rtm_pid = curproc->p_pid;
592 bzero(&info, sizeof(info));
593 info.rti_addrs = rtm->rtm_addrs;
594 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
595 info.rti_info[RTAX_DST] = NULL;
596 senderr(EINVAL);
597 }
598 info.rti_flags = rtm->rtm_flags;
599 if (info.rti_info[RTAX_DST] == NULL ||
600 info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
601 (info.rti_info[RTAX_GATEWAY] != NULL &&
602 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
603 senderr(EINVAL);
604 saf = info.rti_info[RTAX_DST]->sa_family;
605 /*
606 * Verify that the caller has the appropriate privilege; RTM_GET
607 * is the only operation the non-superuser is allowed.
608 */
609 if (rtm->rtm_type != RTM_GET) {
610 error = priv_check(curthread, PRIV_NET_ROUTE);
611 if (error)
612 senderr(error);
613 }
614
615 /*
616 * The given gateway address may be an interface address.
617 * For example, issuing a "route change" command on a route
618 * entry that was created from a tunnel, and the gateway
619 * address given is the local end point. In this case the
620 * RTF_GATEWAY flag must be cleared or the destination will
621 * not be reachable even though there is no error message.
622 */
623 if (info.rti_info[RTAX_GATEWAY] != NULL &&
624 info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
625 struct route gw_ro;
626
627 bzero(&gw_ro, sizeof(gw_ro));
628 gw_ro.ro_dst = *info.rti_info[RTAX_GATEWAY];
629 rtalloc_ign_fib(&gw_ro, 0, so->so_fibnum);
630 /*
631 * A host route through the loopback interface is
632 * installed for each interface adddress. In pre 8.0
633 * releases the interface address of a PPP link type
634 * is not reachable locally. This behavior is fixed as
635 * part of the new L2/L3 redesign and rewrite work. The
636 * signature of this interface address route is the
637 * AF_LINK sa_family type of the rt_gateway, and the
638 * rt_ifp has the IFF_LOOPBACK flag set.
639 */
640 if (gw_ro.ro_rt != NULL &&
641 gw_ro.ro_rt->rt_gateway->sa_family == AF_LINK &&
642 gw_ro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)
643 info.rti_flags &= ~RTF_GATEWAY;
644 if (gw_ro.ro_rt != NULL)
645 RTFREE(gw_ro.ro_rt);
646 }
647
648 switch (rtm->rtm_type) {
649 struct rtentry *saved_nrt;
650
651 case RTM_ADD:
652 if (info.rti_info[RTAX_GATEWAY] == NULL)
653 senderr(EINVAL);
654 saved_nrt = NULL;
655
656 /* support for new ARP code */
657 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
658 (rtm->rtm_flags & RTF_LLDATA) != 0) {
659 error = lla_rt_output(rtm, &info);
660 break;
661 }
662 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt,
663 so->so_fibnum);
664 if (error == 0 && saved_nrt) {
665 RT_LOCK(saved_nrt);
666 rt_setmetrics(rtm->rtm_inits,
667 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
668 rtm->rtm_index = saved_nrt->rt_ifp->if_index;
669 RT_REMREF(saved_nrt);
670 RT_UNLOCK(saved_nrt);
671 }
672 break;
673
674 case RTM_DELETE:
675 saved_nrt = NULL;
676 /* support for new ARP code */
677 if (info.rti_info[RTAX_GATEWAY] &&
678 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
679 (rtm->rtm_flags & RTF_LLDATA) != 0) {
680 error = lla_rt_output(rtm, &info);
681 break;
682 }
683 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt,
684 so->so_fibnum);
685 if (error == 0) {
686 RT_LOCK(saved_nrt);
687 rt = saved_nrt;
688 goto report;
689 }
690 break;
691
692 case RTM_GET:
693 case RTM_CHANGE:
694 case RTM_LOCK:
695 rnh = rt_tables_get_rnh(so->so_fibnum,
696 info.rti_info[RTAX_DST]->sa_family);
697 if (rnh == NULL)
698 senderr(EAFNOSUPPORT);
699
700 RADIX_NODE_HEAD_RLOCK(rnh);
701
702 if (info.rti_info[RTAX_NETMASK] == NULL &&
703 rtm->rtm_type == RTM_GET) {
704 /*
705 * Provide logest prefix match for
706 * address lookup (no mask).
707 * 'route -n get addr'
708 */
709 rt = (struct rtentry *) rnh->rnh_matchaddr(
710 info.rti_info[RTAX_DST], rnh);
711 } else
712 rt = (struct rtentry *) rnh->rnh_lookup(
713 info.rti_info[RTAX_DST],
714 info.rti_info[RTAX_NETMASK], rnh);
715
716 if (rt == NULL) {
717 RADIX_NODE_HEAD_RUNLOCK(rnh);
718 senderr(ESRCH);
719 }
720 #ifdef RADIX_MPATH
721 /*
722 * for RTM_CHANGE/LOCK, if we got multipath routes,
723 * we require users to specify a matching RTAX_GATEWAY.
724 *
725 * for RTM_GET, gate is optional even with multipath.
726 * if gate == NULL the first match is returned.
727 * (no need to call rt_mpath_matchgate if gate == NULL)
728 */
729 if (rn_mpath_capable(rnh) &&
730 (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
731 rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
732 if (!rt) {
733 RADIX_NODE_HEAD_RUNLOCK(rnh);
734 senderr(ESRCH);
735 }
736 }
737 #endif
738 /*
739 * If performing proxied L2 entry insertion, and
740 * the actual PPP host entry is found, perform
741 * another search to retrieve the prefix route of
742 * the local end point of the PPP link.
743 */
744 if (rtm->rtm_flags & RTF_ANNOUNCE) {
745 struct sockaddr laddr;
746
747 if (rt->rt_ifp != NULL &&
748 rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
749 struct ifaddr *ifa;
750
751 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1);
752 if (ifa != NULL)
753 rt_maskedcopy(ifa->ifa_addr,
754 &laddr,
755 ifa->ifa_netmask);
756 } else
757 rt_maskedcopy(rt->rt_ifa->ifa_addr,
758 &laddr,
759 rt->rt_ifa->ifa_netmask);
760 /*
761 * refactor rt and no lock operation necessary
762 */
763 rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, rnh);
764 if (rt == NULL) {
765 RADIX_NODE_HEAD_RUNLOCK(rnh);
766 senderr(ESRCH);
767 }
768 }
769 RT_LOCK(rt);
770 RT_ADDREF(rt);
771 RADIX_NODE_HEAD_RUNLOCK(rnh);
772
773 switch(rtm->rtm_type) {
774
775 case RTM_GET:
776 report:
777 RT_LOCK_ASSERT(rt);
778 if ((rt->rt_flags & RTF_HOST) == 0
779 ? jailed_without_vnet(curthread->td_ucred)
780 : prison_if(curthread->td_ucred,
781 rt_key(rt)) != 0) {
782 RT_UNLOCK(rt);
783 senderr(ESRCH);
784 }
785 info.rti_info[RTAX_DST] = rt_key(rt);
786 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
787 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
788 info.rti_info[RTAX_GENMASK] = 0;
789 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
790 ifp = rt->rt_ifp;
791 if (ifp) {
792 info.rti_info[RTAX_IFP] =
793 ifp->if_addr->ifa_addr;
794 error = rtm_get_jailed(&info, ifp, rt,
795 &saun, curthread->td_ucred);
796 if (error != 0) {
797 RT_UNLOCK(rt);
798 senderr(error);
799 }
800 if (ifp->if_flags & IFF_POINTOPOINT)
801 info.rti_info[RTAX_BRD] =
802 rt->rt_ifa->ifa_dstaddr;
803 rtm->rtm_index = ifp->if_index;
804 } else {
805 info.rti_info[RTAX_IFP] = NULL;
806 info.rti_info[RTAX_IFA] = NULL;
807 }
808 } else if ((ifp = rt->rt_ifp) != NULL) {
809 rtm->rtm_index = ifp->if_index;
810 }
811 len = rt_msg2(rtm->rtm_type, &info, NULL, NULL);
812 if (len > rtm->rtm_msglen) {
813 struct rt_msghdr *new_rtm;
814 R_Malloc(new_rtm, struct rt_msghdr *, len);
815 if (new_rtm == NULL) {
816 RT_UNLOCK(rt);
817 senderr(ENOBUFS);
818 }
819 bcopy(rtm, new_rtm, rtm->rtm_msglen);
820 Free(rtm); rtm = new_rtm;
821 }
822 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL);
823 rtm->rtm_flags = rt->rt_flags;
824 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
825 rtm->rtm_addrs = info.rti_addrs;
826 break;
827
828 case RTM_CHANGE:
829 /*
830 * New gateway could require new ifaddr, ifp;
831 * flags may also be different; ifp may be specified
832 * by ll sockaddr when protocol address is ambiguous
833 */
834 if (((rt->rt_flags & RTF_GATEWAY) &&
835 info.rti_info[RTAX_GATEWAY] != NULL) ||
836 info.rti_info[RTAX_IFP] != NULL ||
837 (info.rti_info[RTAX_IFA] != NULL &&
838 !sa_equal(info.rti_info[RTAX_IFA],
839 rt->rt_ifa->ifa_addr))) {
840 RT_UNLOCK(rt);
841 RADIX_NODE_HEAD_LOCK(rnh);
842 error = rt_getifa_fib(&info, rt->rt_fibnum);
843 /*
844 * XXXRW: Really we should release this
845 * reference later, but this maintains
846 * historical behavior.
847 */
848 if (info.rti_ifa != NULL)
849 ifa_free(info.rti_ifa);
850 RADIX_NODE_HEAD_UNLOCK(rnh);
851 if (error != 0)
852 senderr(error);
853 RT_LOCK(rt);
854 }
855 if (info.rti_ifa != NULL &&
856 info.rti_ifa != rt->rt_ifa &&
857 rt->rt_ifa != NULL &&
858 rt->rt_ifa->ifa_rtrequest != NULL) {
859 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt,
860 &info);
861 ifa_free(rt->rt_ifa);
862 }
863 if (info.rti_info[RTAX_GATEWAY] != NULL) {
864 RT_UNLOCK(rt);
865 RADIX_NODE_HEAD_LOCK(rnh);
866 RT_LOCK(rt);
867
868 error = rt_setgate(rt, rt_key(rt),
869 info.rti_info[RTAX_GATEWAY]);
870 RADIX_NODE_HEAD_UNLOCK(rnh);
871 if (error != 0) {
872 RT_UNLOCK(rt);
873 senderr(error);
874 }
875 rt->rt_flags |= (RTF_GATEWAY & info.rti_flags);
876 }
877 if (info.rti_ifa != NULL &&
878 info.rti_ifa != rt->rt_ifa) {
879 ifa_ref(info.rti_ifa);
880 rt->rt_ifa = info.rti_ifa;
881 rt->rt_ifp = info.rti_ifp;
882 }
883 /* Allow some flags to be toggled on change. */
884 rt->rt_flags = (rt->rt_flags & ~RTF_FMASK) |
885 (rtm->rtm_flags & RTF_FMASK);
886 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
887 &rt->rt_rmx);
888 rtm->rtm_index = rt->rt_ifp->if_index;
889 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
890 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
891 /* FALLTHROUGH */
892 case RTM_LOCK:
893 /* We don't support locks anymore */
894 break;
895 }
896 RT_UNLOCK(rt);
897 break;
898
899 default:
900 senderr(EOPNOTSUPP);
901 }
902
903 flush:
904 if (rtm) {
905 if (error)
906 rtm->rtm_errno = error;
907 else
908 rtm->rtm_flags |= RTF_DONE;
909 }
910 if (rt) /* XXX can this be true? */
911 RTFREE(rt);
912 {
913 struct rawcb *rp = NULL;
914 /*
915 * Check to see if we don't want our own messages.
916 */
917 if ((so->so_options & SO_USELOOPBACK) == 0) {
918 if (route_cb.any_count <= 1) {
919 if (rtm)
920 Free(rtm);
921 m_freem(m);
922 return (error);
923 }
924 /* There is another listener, so construct message */
925 rp = sotorawcb(so);
926 }
927 if (rtm) {
928 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
929 if (m->m_pkthdr.len < rtm->rtm_msglen) {
930 m_freem(m);
931 m = NULL;
932 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
933 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
934 }
935 if (m) {
936 M_SETFIB(m, so->so_fibnum);
937 m->m_flags |= RTS_FILTER_FIB;
938 if (rp) {
939 /*
940 * XXX insure we don't get a copy by
941 * invalidating our protocol
942 */
943 unsigned short family = rp->rcb_proto.sp_family;
944 rp->rcb_proto.sp_family = 0;
945 rt_dispatch(m, saf);
946 rp->rcb_proto.sp_family = family;
947 } else
948 rt_dispatch(m, saf);
949 }
950 /* info.rti_info[RTAX_DST] (used above) can point inside of rtm */
951 if (rtm)
952 Free(rtm);
953 }
954 return (error);
955 #undef sa_equal
956 }
957
958 static void
rt_setmetrics(u_long which,const struct rt_metrics * in,struct rt_metrics_lite * out)959 rt_setmetrics(u_long which, const struct rt_metrics *in,
960 struct rt_metrics_lite *out)
961 {
962 #define metric(f, e) if (which & (f)) out->e = in->e;
963 /*
964 * Only these are stored in the routing entry since introduction
965 * of tcp hostcache. The rest is ignored.
966 */
967 metric(RTV_MTU, rmx_mtu);
968 metric(RTV_WEIGHT, rmx_weight);
969 /* Userland -> kernel timebase conversion. */
970 if (which & RTV_EXPIRE)
971 out->rmx_expire = in->rmx_expire ?
972 in->rmx_expire - time_second + time_uptime : 0;
973 #undef metric
974 }
975
976 static void
rt_getmetrics(const struct rt_metrics_lite * in,struct rt_metrics * out)977 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out)
978 {
979 #define metric(e) out->e = in->e;
980 bzero(out, sizeof(*out));
981 metric(rmx_mtu);
982 metric(rmx_weight);
983 /* Kernel -> userland timebase conversion. */
984 out->rmx_expire = in->rmx_expire ?
985 in->rmx_expire - time_uptime + time_second : 0;
986 #undef metric
987 }
988
989 /*
990 * Extract the addresses of the passed sockaddrs.
991 * Do a little sanity checking so as to avoid bad memory references.
992 * This data is derived straight from userland.
993 */
994 static int
rt_xaddrs(caddr_t cp,caddr_t cplim,struct rt_addrinfo * rtinfo)995 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
996 {
997 struct sockaddr *sa;
998 int i;
999
1000 for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
1001 if ((rtinfo->rti_addrs & (1 << i)) == 0)
1002 continue;
1003 sa = (struct sockaddr *)cp;
1004 /*
1005 * It won't fit.
1006 */
1007 if (cp + sa->sa_len > cplim)
1008 return (EINVAL);
1009 /*
1010 * there are no more.. quit now
1011 * If there are more bits, they are in error.
1012 * I've seen this. route(1) can evidently generate these.
1013 * This causes kernel to core dump.
1014 * for compatibility, If we see this, point to a safe address.
1015 */
1016 if (sa->sa_len == 0) {
1017 rtinfo->rti_info[i] = &sa_zero;
1018 return (0); /* should be EINVAL but for compat */
1019 }
1020 /* accept it */
1021 rtinfo->rti_info[i] = sa;
1022 cp += SA_SIZE(sa);
1023 }
1024 return (0);
1025 }
1026
1027 /*
1028 * Used by the routing socket.
1029 */
1030 static struct mbuf *
rt_msg1(int type,struct rt_addrinfo * rtinfo)1031 rt_msg1(int type, struct rt_addrinfo *rtinfo)
1032 {
1033 struct rt_msghdr *rtm;
1034 struct mbuf *m;
1035 int i;
1036 struct sockaddr *sa;
1037 int len, dlen;
1038
1039 switch (type) {
1040
1041 case RTM_DELADDR:
1042 case RTM_NEWADDR:
1043 len = sizeof(struct ifa_msghdr);
1044 break;
1045
1046 case RTM_DELMADDR:
1047 case RTM_NEWMADDR:
1048 len = sizeof(struct ifma_msghdr);
1049 break;
1050
1051 case RTM_IFINFO:
1052 len = sizeof(struct if_msghdr);
1053 break;
1054
1055 case RTM_IFANNOUNCE:
1056 case RTM_IEEE80211:
1057 len = sizeof(struct if_announcemsghdr);
1058 break;
1059
1060 default:
1061 len = sizeof(struct rt_msghdr);
1062 }
1063 if (len > MCLBYTES)
1064 panic("rt_msg1");
1065 m = m_gethdr(M_DONTWAIT, MT_DATA);
1066 if (m && len > MHLEN) {
1067 MCLGET(m, M_DONTWAIT);
1068 if ((m->m_flags & M_EXT) == 0) {
1069 m_free(m);
1070 m = NULL;
1071 }
1072 }
1073 if (m == NULL)
1074 return (m);
1075 m->m_pkthdr.len = m->m_len = len;
1076 m->m_pkthdr.rcvif = NULL;
1077 rtm = mtod(m, struct rt_msghdr *);
1078 bzero((caddr_t)rtm, len);
1079 for (i = 0; i < RTAX_MAX; i++) {
1080 if ((sa = rtinfo->rti_info[i]) == NULL)
1081 continue;
1082 rtinfo->rti_addrs |= (1 << i);
1083 dlen = SA_SIZE(sa);
1084 m_copyback(m, len, dlen, (caddr_t)sa);
1085 len += dlen;
1086 }
1087 if (m->m_pkthdr.len != len) {
1088 m_freem(m);
1089 return (NULL);
1090 }
1091 rtm->rtm_msglen = len;
1092 rtm->rtm_version = RTM_VERSION;
1093 rtm->rtm_type = type;
1094 return (m);
1095 }
1096
1097 /*
1098 * Used by the sysctl code and routing socket.
1099 */
1100 static int
rt_msg2(int type,struct rt_addrinfo * rtinfo,caddr_t cp,struct walkarg * w)1101 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
1102 {
1103 int i;
1104 int len, dlen, second_time = 0;
1105 caddr_t cp0;
1106
1107 rtinfo->rti_addrs = 0;
1108 again:
1109 switch (type) {
1110
1111 case RTM_DELADDR:
1112 case RTM_NEWADDR:
1113 if (w != NULL && w->w_op == NET_RT_IFLISTL) {
1114 #ifdef COMPAT_FREEBSD32
1115 if (w->w_req->flags & SCTL_MASK32)
1116 len = sizeof(struct ifa_msghdrl32);
1117 else
1118 #endif
1119 len = sizeof(struct ifa_msghdrl);
1120 } else
1121 len = sizeof(struct ifa_msghdr);
1122 break;
1123
1124 case RTM_IFINFO:
1125 #ifdef COMPAT_FREEBSD32
1126 if (w != NULL && w->w_req->flags & SCTL_MASK32) {
1127 if (w->w_op == NET_RT_IFLISTL)
1128 len = sizeof(struct if_msghdrl32);
1129 else
1130 len = sizeof(struct if_msghdr32);
1131 break;
1132 }
1133 #endif
1134 if (w != NULL && w->w_op == NET_RT_IFLISTL)
1135 len = sizeof(struct if_msghdrl);
1136 else
1137 len = sizeof(struct if_msghdr);
1138 break;
1139
1140 case RTM_NEWMADDR:
1141 len = sizeof(struct ifma_msghdr);
1142 break;
1143
1144 default:
1145 len = sizeof(struct rt_msghdr);
1146 }
1147 cp0 = cp;
1148 if (cp0)
1149 cp += len;
1150 for (i = 0; i < RTAX_MAX; i++) {
1151 struct sockaddr *sa;
1152
1153 if ((sa = rtinfo->rti_info[i]) == NULL)
1154 continue;
1155 rtinfo->rti_addrs |= (1 << i);
1156 dlen = SA_SIZE(sa);
1157 if (cp) {
1158 bcopy((caddr_t)sa, cp, (unsigned)dlen);
1159 cp += dlen;
1160 }
1161 len += dlen;
1162 }
1163 len = ALIGN(len);
1164 if (cp == NULL && w != NULL && !second_time) {
1165 struct walkarg *rw = w;
1166
1167 if (rw->w_req) {
1168 if (rw->w_tmemsize < len) {
1169 if (rw->w_tmem)
1170 free(rw->w_tmem, M_RTABLE);
1171 rw->w_tmem = (caddr_t)
1172 malloc(len, M_RTABLE, M_NOWAIT);
1173 if (rw->w_tmem)
1174 rw->w_tmemsize = len;
1175 }
1176 if (rw->w_tmem) {
1177 cp = rw->w_tmem;
1178 second_time = 1;
1179 goto again;
1180 }
1181 }
1182 }
1183 if (cp) {
1184 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
1185
1186 rtm->rtm_version = RTM_VERSION;
1187 rtm->rtm_type = type;
1188 rtm->rtm_msglen = len;
1189 }
1190 return (len);
1191 }
1192
1193 /*
1194 * This routine is called to generate a message from the routing
1195 * socket indicating that a redirect has occured, a routing lookup
1196 * has failed, or that a protocol has detected timeouts to a particular
1197 * destination.
1198 */
1199 void
rt_missmsg_fib(int type,struct rt_addrinfo * rtinfo,int flags,int error,int fibnum)1200 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error,
1201 int fibnum)
1202 {
1203 struct rt_msghdr *rtm;
1204 struct mbuf *m;
1205 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
1206
1207 if (route_cb.any_count == 0)
1208 return;
1209 m = rt_msg1(type, rtinfo);
1210 if (m == NULL)
1211 return;
1212
1213 if (fibnum != RT_ALL_FIBS) {
1214 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
1215 "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
1216 M_SETFIB(m, fibnum);
1217 m->m_flags |= RTS_FILTER_FIB;
1218 }
1219
1220 rtm = mtod(m, struct rt_msghdr *);
1221 rtm->rtm_flags = RTF_DONE | flags;
1222 rtm->rtm_errno = error;
1223 rtm->rtm_addrs = rtinfo->rti_addrs;
1224 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1225 }
1226
1227 void
rt_missmsg(int type,struct rt_addrinfo * rtinfo,int flags,int error)1228 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
1229 {
1230
1231 rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS);
1232 }
1233
1234 /*
1235 * This routine is called to generate a message from the routing
1236 * socket indicating that the status of a network interface has changed.
1237 */
1238 void
rt_ifmsg(struct ifnet * ifp)1239 rt_ifmsg(struct ifnet *ifp)
1240 {
1241 struct if_msghdr *ifm;
1242 struct mbuf *m;
1243 struct rt_addrinfo info;
1244
1245 if (route_cb.any_count == 0)
1246 return;
1247 bzero((caddr_t)&info, sizeof(info));
1248 m = rt_msg1(RTM_IFINFO, &info);
1249 if (m == NULL)
1250 return;
1251 ifm = mtod(m, struct if_msghdr *);
1252 ifm->ifm_index = ifp->if_index;
1253 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1254 ifm->ifm_data = ifp->if_data;
1255 ifm->ifm_addrs = 0;
1256 rt_dispatch(m, AF_UNSPEC);
1257 }
1258
1259 /*
1260 * Announce interface address arrival/withdraw.
1261 * Please do not call directly, use rt_addrmsg().
1262 * Assume input data to be valid.
1263 * Returns 0 on success.
1264 */
1265 int
rtsock_addrmsg(int cmd,struct ifaddr * ifa,int fibnum)1266 rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
1267 {
1268 struct rt_addrinfo info;
1269 struct sockaddr *sa;
1270 int ncmd;
1271 struct mbuf *m;
1272 struct ifa_msghdr *ifam;
1273 struct ifnet *ifp = ifa->ifa_ifp;
1274
1275 if (route_cb.any_count == 0)
1276 return (0);
1277
1278 ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
1279
1280 bzero((caddr_t)&info, sizeof(info));
1281 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
1282 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
1283 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1284 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1285 if ((m = rt_msg1(ncmd, &info)) == NULL)
1286 return (ENOBUFS);
1287 ifam = mtod(m, struct ifa_msghdr *);
1288 ifam->ifam_index = ifp->if_index;
1289 ifam->ifam_metric = ifa->ifa_metric;
1290 ifam->ifam_flags = ifa->ifa_flags;
1291 ifam->ifam_addrs = info.rti_addrs;
1292
1293 if (fibnum != RT_ALL_FIBS) {
1294 M_SETFIB(m, fibnum);
1295 m->m_flags |= RTS_FILTER_FIB;
1296 }
1297
1298 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1299
1300 return (0);
1301 }
1302
1303 /*
1304 * Announce route addition/removal.
1305 * Please do not call directly, use rt_routemsg().
1306 * Note that @rt data MAY be inconsistent/invalid:
1307 * if some userland app sends us "invalid" route message (invalid mask,
1308 * no dst, wrong address families, etc...) we need to pass it back
1309 * to app (and any other rtsock consumers) with rtm_errno field set to
1310 * non-zero value.
1311 *
1312 * Returns 0 on success.
1313 */
1314 int
rtsock_routemsg(int cmd,struct ifnet * ifp,int error,struct rtentry * rt,int fibnum)1315 rtsock_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt,
1316 int fibnum)
1317 {
1318 struct rt_addrinfo info;
1319 struct sockaddr *sa;
1320 struct mbuf *m;
1321 struct rt_msghdr *rtm;
1322
1323 if (route_cb.any_count == 0)
1324 return (0);
1325
1326 bzero((caddr_t)&info, sizeof(info));
1327 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1328 info.rti_info[RTAX_DST] = sa = rt_key(rt);
1329 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1330 if ((m = rt_msg1(cmd, &info)) == NULL)
1331 return (ENOBUFS);
1332 rtm = mtod(m, struct rt_msghdr *);
1333 rtm->rtm_index = ifp->if_index;
1334 rtm->rtm_flags |= rt->rt_flags;
1335 rtm->rtm_errno = error;
1336 rtm->rtm_addrs = info.rti_addrs;
1337
1338 if (fibnum != RT_ALL_FIBS) {
1339 M_SETFIB(m, fibnum);
1340 m->m_flags |= RTS_FILTER_FIB;
1341 }
1342
1343 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1344
1345 return (0);
1346 }
1347
1348 /*
1349 * This is the analogue to the rt_newaddrmsg which performs the same
1350 * function but for multicast group memberhips. This is easier since
1351 * there is no route state to worry about.
1352 */
1353 void
rt_newmaddrmsg(int cmd,struct ifmultiaddr * ifma)1354 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1355 {
1356 struct rt_addrinfo info;
1357 struct mbuf *m = NULL;
1358 struct ifnet *ifp = ifma->ifma_ifp;
1359 struct ifma_msghdr *ifmam;
1360
1361 if (route_cb.any_count == 0)
1362 return;
1363
1364 bzero((caddr_t)&info, sizeof(info));
1365 info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1366 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
1367 /*
1368 * If a link-layer address is present, present it as a ``gateway''
1369 * (similarly to how ARP entries, e.g., are presented).
1370 */
1371 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
1372 m = rt_msg1(cmd, &info);
1373 if (m == NULL)
1374 return;
1375 ifmam = mtod(m, struct ifma_msghdr *);
1376 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
1377 __func__));
1378 ifmam->ifmam_index = ifp->if_index;
1379 ifmam->ifmam_addrs = info.rti_addrs;
1380 rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC);
1381 }
1382
1383 static struct mbuf *
rt_makeifannouncemsg(struct ifnet * ifp,int type,int what,struct rt_addrinfo * info)1384 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1385 struct rt_addrinfo *info)
1386 {
1387 struct if_announcemsghdr *ifan;
1388 struct mbuf *m;
1389
1390 if (route_cb.any_count == 0)
1391 return NULL;
1392 bzero((caddr_t)info, sizeof(*info));
1393 m = rt_msg1(type, info);
1394 if (m != NULL) {
1395 ifan = mtod(m, struct if_announcemsghdr *);
1396 ifan->ifan_index = ifp->if_index;
1397 strlcpy(ifan->ifan_name, ifp->if_xname,
1398 sizeof(ifan->ifan_name));
1399 ifan->ifan_what = what;
1400 }
1401 return m;
1402 }
1403
1404 /*
1405 * This is called to generate routing socket messages indicating
1406 * IEEE80211 wireless events.
1407 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1408 */
1409 void
rt_ieee80211msg(struct ifnet * ifp,int what,void * data,size_t data_len)1410 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1411 {
1412 struct mbuf *m;
1413 struct rt_addrinfo info;
1414
1415 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1416 if (m != NULL) {
1417 /*
1418 * Append the ieee80211 data. Try to stick it in the
1419 * mbuf containing the ifannounce msg; otherwise allocate
1420 * a new mbuf and append.
1421 *
1422 * NB: we assume m is a single mbuf.
1423 */
1424 if (data_len > M_TRAILINGSPACE(m)) {
1425 struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
1426 if (n == NULL) {
1427 m_freem(m);
1428 return;
1429 }
1430 bcopy(data, mtod(n, void *), data_len);
1431 n->m_len = data_len;
1432 m->m_next = n;
1433 } else if (data_len > 0) {
1434 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1435 m->m_len += data_len;
1436 }
1437 if (m->m_flags & M_PKTHDR)
1438 m->m_pkthdr.len += data_len;
1439 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1440 rt_dispatch(m, AF_UNSPEC);
1441 }
1442 }
1443
1444 /*
1445 * This is called to generate routing socket messages indicating
1446 * network interface arrival and departure.
1447 */
1448 void
rt_ifannouncemsg(struct ifnet * ifp,int what)1449 rt_ifannouncemsg(struct ifnet *ifp, int what)
1450 {
1451 struct mbuf *m;
1452 struct rt_addrinfo info;
1453
1454 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
1455 if (m != NULL)
1456 rt_dispatch(m, AF_UNSPEC);
1457 }
1458
1459 static void
rt_dispatch(struct mbuf * m,sa_family_t saf)1460 rt_dispatch(struct mbuf *m, sa_family_t saf)
1461 {
1462 struct m_tag *tag;
1463
1464 /*
1465 * Preserve the family from the sockaddr, if any, in an m_tag for
1466 * use when injecting the mbuf into the routing socket buffer from
1467 * the netisr.
1468 */
1469 if (saf != AF_UNSPEC) {
1470 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
1471 M_NOWAIT);
1472 if (tag == NULL) {
1473 m_freem(m);
1474 return;
1475 }
1476 *(unsigned short *)(tag + 1) = saf;
1477 m_tag_prepend(m, tag);
1478 }
1479 #ifdef VIMAGE
1480 if (V_loif)
1481 m->m_pkthdr.rcvif = V_loif;
1482 else {
1483 m_freem(m);
1484 return;
1485 }
1486 #endif
1487 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */
1488 }
1489
1490 /*
1491 * This is used in dumping the kernel table via sysctl().
1492 */
1493 static int
sysctl_dumpentry(struct radix_node * rn,void * vw)1494 sysctl_dumpentry(struct radix_node *rn, void *vw)
1495 {
1496 struct walkarg *w = vw;
1497 struct rtentry *rt = (struct rtentry *)rn;
1498 int error = 0, size;
1499 struct rt_addrinfo info;
1500
1501 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1502 return 0;
1503 if ((rt->rt_flags & RTF_HOST) == 0
1504 ? jailed_without_vnet(w->w_req->td->td_ucred)
1505 : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0)
1506 return (0);
1507 bzero((caddr_t)&info, sizeof(info));
1508 info.rti_info[RTAX_DST] = rt_key(rt);
1509 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1510 info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1511 info.rti_info[RTAX_GENMASK] = 0;
1512 if (rt->rt_ifp) {
1513 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
1514 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
1515 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1516 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
1517 }
1518 size = rt_msg2(RTM_GET, &info, NULL, w);
1519 if (w->w_req && w->w_tmem) {
1520 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1521
1522 rtm->rtm_flags = rt->rt_flags;
1523 /*
1524 * let's be honest about this being a retarded hack
1525 */
1526 rtm->rtm_fmask = rt->rt_rmx.rmx_pksent;
1527 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
1528 rtm->rtm_index = rt->rt_ifp->if_index;
1529 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1530 rtm->rtm_addrs = info.rti_addrs;
1531 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1532 return (error);
1533 }
1534 return (error);
1535 }
1536
1537 #ifdef COMPAT_FREEBSD32
1538 static void
copy_ifdata32(struct if_data * src,struct if_data32 * dst)1539 copy_ifdata32(struct if_data *src, struct if_data32 *dst)
1540 {
1541
1542 bzero(dst, sizeof(*dst));
1543 CP(*src, *dst, ifi_type);
1544 CP(*src, *dst, ifi_physical);
1545 CP(*src, *dst, ifi_addrlen);
1546 CP(*src, *dst, ifi_hdrlen);
1547 CP(*src, *dst, ifi_link_state);
1548 dst->ifi_datalen = sizeof(struct if_data32);
1549 CP(*src, *dst, ifi_mtu);
1550 CP(*src, *dst, ifi_metric);
1551 CP(*src, *dst, ifi_baudrate);
1552 CP(*src, *dst, ifi_ipackets);
1553 CP(*src, *dst, ifi_ierrors);
1554 CP(*src, *dst, ifi_opackets);
1555 CP(*src, *dst, ifi_oerrors);
1556 CP(*src, *dst, ifi_collisions);
1557 CP(*src, *dst, ifi_ibytes);
1558 CP(*src, *dst, ifi_obytes);
1559 CP(*src, *dst, ifi_imcasts);
1560 CP(*src, *dst, ifi_omcasts);
1561 CP(*src, *dst, ifi_iqdrops);
1562 CP(*src, *dst, ifi_noproto);
1563 CP(*src, *dst, ifi_hwassist);
1564 CP(*src, *dst, ifi_epoch);
1565 TV_CP(*src, *dst, ifi_lastchange);
1566 }
1567 #endif
1568
1569 static int
sysctl_iflist_ifml(struct ifnet * ifp,struct rt_addrinfo * info,struct walkarg * w,int len)1570 sysctl_iflist_ifml(struct ifnet *ifp, struct rt_addrinfo *info,
1571 struct walkarg *w, int len)
1572 {
1573 struct if_msghdrl *ifm;
1574
1575 #ifdef COMPAT_FREEBSD32
1576 if (w->w_req->flags & SCTL_MASK32) {
1577 struct if_msghdrl32 *ifm32;
1578
1579 ifm32 = (struct if_msghdrl32 *)w->w_tmem;
1580 ifm32->ifm_addrs = info->rti_addrs;
1581 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1582 ifm32->ifm_index = ifp->if_index;
1583 ifm32->_ifm_spare1 = 0;
1584 ifm32->ifm_len = sizeof(*ifm32);
1585 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data);
1586
1587 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1588
1589 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1590 }
1591 #endif
1592 ifm = (struct if_msghdrl *)w->w_tmem;
1593 ifm->ifm_addrs = info->rti_addrs;
1594 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1595 ifm->ifm_index = ifp->if_index;
1596 ifm->_ifm_spare1 = 0;
1597 ifm->ifm_len = sizeof(*ifm);
1598 ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data);
1599
1600 ifm->ifm_data = ifp->if_data;
1601
1602 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1603 }
1604
1605 static int
sysctl_iflist_ifm(struct ifnet * ifp,struct rt_addrinfo * info,struct walkarg * w,int len)1606 sysctl_iflist_ifm(struct ifnet *ifp, struct rt_addrinfo *info,
1607 struct walkarg *w, int len)
1608 {
1609 struct if_msghdr *ifm;
1610
1611 #ifdef COMPAT_FREEBSD32
1612 if (w->w_req->flags & SCTL_MASK32) {
1613 struct if_msghdr32 *ifm32;
1614
1615 ifm32 = (struct if_msghdr32 *)w->w_tmem;
1616 ifm32->ifm_addrs = info->rti_addrs;
1617 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1618 ifm32->ifm_index = ifp->if_index;
1619
1620 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1621
1622 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1623 }
1624 #endif
1625 ifm = (struct if_msghdr *)w->w_tmem;
1626 ifm->ifm_addrs = info->rti_addrs;
1627 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1628 ifm->ifm_index = ifp->if_index;
1629
1630 ifm->ifm_data = ifp->if_data;
1631
1632 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1633 }
1634
1635 static int
sysctl_iflist_ifaml(struct ifaddr * ifa,struct rt_addrinfo * info,struct walkarg * w,int len)1636 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info,
1637 struct walkarg *w, int len)
1638 {
1639 struct ifa_msghdrl *ifam;
1640
1641 #ifdef COMPAT_FREEBSD32
1642 if (w->w_req->flags & SCTL_MASK32) {
1643 struct ifa_msghdrl32 *ifam32;
1644
1645 ifam32 = (struct ifa_msghdrl32 *)w->w_tmem;
1646 ifam32->ifam_addrs = info->rti_addrs;
1647 ifam32->ifam_flags = ifa->ifa_flags;
1648 ifam32->ifam_index = ifa->ifa_ifp->if_index;
1649 ifam32->_ifam_spare1 = 0;
1650 ifam32->ifam_len = sizeof(*ifam32);
1651 ifam32->ifam_data_off =
1652 offsetof(struct ifa_msghdrl32, ifam_data);
1653 ifam32->ifam_metric = ifa->ifa_metric;
1654
1655 copy_ifdata32(&ifa->ifa_ifp->if_data, &ifam32->ifam_data);
1656
1657 return (SYSCTL_OUT(w->w_req, (caddr_t)ifam32, len));
1658 }
1659 #endif
1660
1661 ifam = (struct ifa_msghdrl *)w->w_tmem;
1662 ifam->ifam_addrs = info->rti_addrs;
1663 ifam->ifam_flags = ifa->ifa_flags;
1664 ifam->ifam_index = ifa->ifa_ifp->if_index;
1665 ifam->_ifam_spare1 = 0;
1666 ifam->ifam_len = sizeof(*ifam);
1667 ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data);
1668 ifam->ifam_metric = ifa->ifa_metric;
1669
1670 ifam->ifam_data = ifa->if_data;
1671
1672 return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1673 }
1674
1675 static int
sysctl_iflist_ifam(struct ifaddr * ifa,struct rt_addrinfo * info,struct walkarg * w,int len)1676 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info,
1677 struct walkarg *w, int len)
1678 {
1679 struct ifa_msghdr *ifam;
1680
1681 ifam = (struct ifa_msghdr *)w->w_tmem;
1682 ifam->ifam_addrs = info->rti_addrs;
1683 ifam->ifam_flags = ifa->ifa_flags;
1684 ifam->ifam_index = ifa->ifa_ifp->if_index;
1685 ifam->ifam_metric = ifa->ifa_metric;
1686
1687 return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1688 }
1689
1690 static int
sysctl_iflist(int af,struct walkarg * w)1691 sysctl_iflist(int af, struct walkarg *w)
1692 {
1693 struct ifnet *ifp;
1694 struct ifaddr *ifa;
1695 struct rt_addrinfo info;
1696 int len, error = 0;
1697
1698 bzero((caddr_t)&info, sizeof(info));
1699 IFNET_RLOCK();
1700 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1701 if (w->w_arg && w->w_arg != ifp->if_index)
1702 continue;
1703 IF_ADDR_RLOCK(ifp);
1704 ifa = ifp->if_addr;
1705 info.rti_info[RTAX_IFP] = ifa->ifa_addr;
1706 len = rt_msg2(RTM_IFINFO, &info, NULL, w);
1707 info.rti_info[RTAX_IFP] = NULL;
1708 if (w->w_req && w->w_tmem) {
1709 if (w->w_op == NET_RT_IFLISTL)
1710 error = sysctl_iflist_ifml(ifp, &info, w, len);
1711 else
1712 error = sysctl_iflist_ifm(ifp, &info, w, len);
1713 if (error)
1714 goto done;
1715 }
1716 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1717 if (af && af != ifa->ifa_addr->sa_family)
1718 continue;
1719 if (prison_if(w->w_req->td->td_ucred,
1720 ifa->ifa_addr) != 0)
1721 continue;
1722 info.rti_info[RTAX_IFA] = ifa->ifa_addr;
1723 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1724 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1725 len = rt_msg2(RTM_NEWADDR, &info, NULL, w);
1726 if (w->w_req && w->w_tmem) {
1727 if (w->w_op == NET_RT_IFLISTL)
1728 error = sysctl_iflist_ifaml(ifa, &info,
1729 w, len);
1730 else
1731 error = sysctl_iflist_ifam(ifa, &info,
1732 w, len);
1733 if (error)
1734 goto done;
1735 }
1736 }
1737 IF_ADDR_RUNLOCK(ifp);
1738 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] =
1739 info.rti_info[RTAX_BRD] = NULL;
1740 }
1741 done:
1742 if (ifp != NULL)
1743 IF_ADDR_RUNLOCK(ifp);
1744 IFNET_RUNLOCK();
1745 return (error);
1746 }
1747
1748 static int
sysctl_ifmalist(int af,struct walkarg * w)1749 sysctl_ifmalist(int af, struct walkarg *w)
1750 {
1751 struct ifnet *ifp;
1752 struct ifmultiaddr *ifma;
1753 struct rt_addrinfo info;
1754 int len, error = 0;
1755 struct ifaddr *ifa;
1756
1757 bzero((caddr_t)&info, sizeof(info));
1758 IFNET_RLOCK();
1759 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1760 if (w->w_arg && w->w_arg != ifp->if_index)
1761 continue;
1762 ifa = ifp->if_addr;
1763 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
1764 IF_ADDR_RLOCK(ifp);
1765 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1766 if (af && af != ifma->ifma_addr->sa_family)
1767 continue;
1768 if (prison_if(w->w_req->td->td_ucred,
1769 ifma->ifma_addr) != 0)
1770 continue;
1771 info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1772 info.rti_info[RTAX_GATEWAY] =
1773 (ifma->ifma_addr->sa_family != AF_LINK) ?
1774 ifma->ifma_lladdr : NULL;
1775 len = rt_msg2(RTM_NEWMADDR, &info, NULL, w);
1776 if (w->w_req && w->w_tmem) {
1777 struct ifma_msghdr *ifmam;
1778
1779 ifmam = (struct ifma_msghdr *)w->w_tmem;
1780 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1781 ifmam->ifmam_flags = 0;
1782 ifmam->ifmam_addrs = info.rti_addrs;
1783 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1784 if (error) {
1785 IF_ADDR_RUNLOCK(ifp);
1786 goto done;
1787 }
1788 }
1789 }
1790 IF_ADDR_RUNLOCK(ifp);
1791 }
1792 done:
1793 IFNET_RUNLOCK();
1794 return (error);
1795 }
1796
1797 static int
sysctl_rtsock(SYSCTL_HANDLER_ARGS)1798 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1799 {
1800 int *name = (int *)arg1;
1801 u_int namelen = arg2;
1802 struct radix_node_head *rnh = NULL; /* silence compiler. */
1803 int i, lim, error = EINVAL;
1804 int fib = 0;
1805 u_char af;
1806 struct walkarg w;
1807
1808 name ++;
1809 namelen--;
1810 if (req->newptr)
1811 return (EPERM);
1812 if (name[1] == NET_RT_DUMP) {
1813 if (namelen == 3)
1814 fib = req->td->td_proc->p_fibnum;
1815 else if (namelen == 4)
1816 fib = (name[3] == RT_ALL_FIBS) ?
1817 req->td->td_proc->p_fibnum : name[3];
1818 else
1819 return ((namelen < 3) ? EISDIR : ENOTDIR);
1820 if (fib < 0 || fib >= rt_numfibs)
1821 return (EINVAL);
1822 } else if (namelen != 3)
1823 return ((namelen < 3) ? EISDIR : ENOTDIR);
1824 af = name[0];
1825 if (af > AF_MAX)
1826 return (EINVAL);
1827 bzero(&w, sizeof(w));
1828 w.w_op = name[1];
1829 w.w_arg = name[2];
1830 w.w_req = req;
1831
1832 error = sysctl_wire_old_buffer(req, 0);
1833 if (error)
1834 return (error);
1835 switch (w.w_op) {
1836
1837 case NET_RT_DUMP:
1838 case NET_RT_FLAGS:
1839 if (af == 0) { /* dump all tables */
1840 i = 1;
1841 lim = AF_MAX;
1842 } else /* dump only one table */
1843 i = lim = af;
1844
1845 /*
1846 * take care of llinfo entries, the caller must
1847 * specify an AF
1848 */
1849 if (w.w_op == NET_RT_FLAGS &&
1850 (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) {
1851 if (af != 0)
1852 error = lltable_sysctl_dumparp(af, w.w_req);
1853 else
1854 error = EINVAL;
1855 break;
1856 }
1857 /*
1858 * take care of routing entries
1859 */
1860 for (error = 0; error == 0 && i <= lim; i++) {
1861 rnh = rt_tables_get_rnh(fib, i);
1862 if (rnh != NULL) {
1863 RADIX_NODE_HEAD_RLOCK(rnh);
1864 error = rnh->rnh_walktree(rnh,
1865 sysctl_dumpentry, &w);
1866 RADIX_NODE_HEAD_RUNLOCK(rnh);
1867 } else if (af != 0)
1868 error = EAFNOSUPPORT;
1869 }
1870 break;
1871
1872 case NET_RT_IFLIST:
1873 case NET_RT_IFLISTL:
1874 error = sysctl_iflist(af, &w);
1875 break;
1876
1877 case NET_RT_IFMALIST:
1878 error = sysctl_ifmalist(af, &w);
1879 break;
1880 }
1881 if (w.w_tmem)
1882 free(w.w_tmem, M_RTABLE);
1883 return (error);
1884 }
1885
1886 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1887
1888 /*
1889 * Definitions of protocols supported in the ROUTE domain.
1890 */
1891
1892 static struct domain routedomain; /* or at least forward */
1893
1894 static struct protosw routesw[] = {
1895 {
1896 .pr_type = SOCK_RAW,
1897 .pr_domain = &routedomain,
1898 .pr_flags = PR_ATOMIC|PR_ADDR,
1899 .pr_output = route_output,
1900 .pr_ctlinput = raw_ctlinput,
1901 .pr_init = raw_init,
1902 .pr_usrreqs = &route_usrreqs
1903 }
1904 };
1905
1906 static struct domain routedomain = {
1907 .dom_family = PF_ROUTE,
1908 .dom_name = "route",
1909 .dom_protosw = routesw,
1910 .dom_protoswNPROTOSW = &routesw[sizeof(routesw)/sizeof(routesw[0])]
1911 };
1912
1913 VNET_DOMAIN_SET(route);
1914