FreeBSD/Linux Kernel Cross Reference
sys/net/rtsock.c
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 * $FreeBSD$
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_var.h>
56 #include <net/if_dl.h>
57 #include <net/if_llatbl.h>
58 #include <net/if_types.h>
59 #include <net/netisr.h>
60 #include <net/raw_cb.h>
61 #include <net/route.h>
62 #include <net/route_var.h>
63 #include <net/vnet.h>
64
65 #include <netinet/in.h>
66 #include <netinet/if_ether.h>
67 #include <netinet/ip_carp.h>
68 #ifdef INET6
69 #include <netinet6/ip6_var.h>
70 #include <netinet6/scope6_var.h>
71 #endif
72
73 #ifdef COMPAT_FREEBSD32
74 #include <sys/mount.h>
75 #include <compat/freebsd32/freebsd32.h>
76
77 struct if_msghdr32 {
78 uint16_t ifm_msglen;
79 uint8_t ifm_version;
80 uint8_t ifm_type;
81 int32_t ifm_addrs;
82 int32_t ifm_flags;
83 uint16_t ifm_index;
84 uint16_t _ifm_spare1;
85 struct if_data ifm_data;
86 };
87
88 struct if_msghdrl32 {
89 uint16_t ifm_msglen;
90 uint8_t ifm_version;
91 uint8_t ifm_type;
92 int32_t ifm_addrs;
93 int32_t ifm_flags;
94 uint16_t ifm_index;
95 uint16_t _ifm_spare1;
96 uint16_t ifm_len;
97 uint16_t ifm_data_off;
98 uint32_t _ifm_spare2;
99 struct if_data ifm_data;
100 };
101
102 struct ifa_msghdrl32 {
103 uint16_t ifam_msglen;
104 uint8_t ifam_version;
105 uint8_t ifam_type;
106 int32_t ifam_addrs;
107 int32_t ifam_flags;
108 uint16_t ifam_index;
109 uint16_t _ifam_spare1;
110 uint16_t ifam_len;
111 uint16_t ifam_data_off;
112 int32_t ifam_metric;
113 struct if_data ifam_data;
114 };
115
116 #define SA_SIZE32(sa) \
117 ( (((struct sockaddr *)(sa))->sa_len == 0) ? \
118 sizeof(int) : \
119 1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(int) - 1) ) )
120
121 #endif /* COMPAT_FREEBSD32 */
122
123 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
124
125 /* NB: these are not modified */
126 static struct sockaddr route_src = { 2, PF_ROUTE, };
127 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
128
129 /* These are external hooks for CARP. */
130 int (*carp_get_vhid_p)(struct ifaddr *);
131
132 /*
133 * Used by rtsock/raw_input callback code to decide whether to filter the update
134 * notification to a socket bound to a particular FIB.
135 */
136 #define RTS_FILTER_FIB M_PROTO8
137
138 typedef struct {
139 int ip_count; /* attached w/ AF_INET */
140 int ip6_count; /* attached w/ AF_INET6 */
141 int any_count; /* total attached */
142 } route_cb_t;
143 static VNET_DEFINE(route_cb_t, route_cb);
144 #define V_route_cb VNET(route_cb)
145
146 struct mtx rtsock_mtx;
147 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
148
149 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx)
150 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
151 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED)
152
153 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
154
155 struct walkarg {
156 int w_tmemsize;
157 int w_op, w_arg;
158 caddr_t w_tmem;
159 struct sysctl_req *w_req;
160 };
161
162 static void rts_input(struct mbuf *m);
163 static struct mbuf *rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo);
164 static int rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo,
165 struct walkarg *w, int *plen);
166 static int rt_xaddrs(caddr_t cp, caddr_t cplim,
167 struct rt_addrinfo *rtinfo);
168 static int sysctl_dumpentry(struct radix_node *rn, void *vw);
169 static int sysctl_iflist(int af, struct walkarg *w);
170 static int sysctl_ifmalist(int af, struct walkarg *w);
171 static int route_output(struct mbuf *m, struct socket *so, ...);
172 static void rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out);
173 static void rt_dispatch(struct mbuf *, sa_family_t);
174 static struct sockaddr *rtsock_fix_netmask(struct sockaddr *dst,
175 struct sockaddr *smask, struct sockaddr_storage *dmask);
176
177 static struct netisr_handler rtsock_nh = {
178 .nh_name = "rtsock",
179 .nh_handler = rts_input,
180 .nh_proto = NETISR_ROUTE,
181 .nh_policy = NETISR_POLICY_SOURCE,
182 };
183
184 static int
185 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)
186 {
187 int error, qlimit;
188
189 netisr_getqlimit(&rtsock_nh, &qlimit);
190 error = sysctl_handle_int(oidp, &qlimit, 0, req);
191 if (error || !req->newptr)
192 return (error);
193 if (qlimit < 1)
194 return (EINVAL);
195 return (netisr_setqlimit(&rtsock_nh, qlimit));
196 }
197 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
198 0, 0, sysctl_route_netisr_maxqlen, "I",
199 "maximum routing socket dispatch queue length");
200
201 static void
202 vnet_rts_init(void)
203 {
204 int tmp;
205
206 if (IS_DEFAULT_VNET(curvnet)) {
207 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
208 rtsock_nh.nh_qlimit = tmp;
209 netisr_register(&rtsock_nh);
210 }
211 #ifdef VIMAGE
212 else
213 netisr_register_vnet(&rtsock_nh);
214 #endif
215 }
216 VNET_SYSINIT(vnet_rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD,
217 vnet_rts_init, 0);
218
219 #ifdef VIMAGE
220 static void
221 vnet_rts_uninit(void)
222 {
223
224 netisr_unregister_vnet(&rtsock_nh);
225 }
226 VNET_SYSUNINIT(vnet_rts_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD,
227 vnet_rts_uninit, 0);
228 #endif
229
230 static int
231 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src,
232 struct rawcb *rp)
233 {
234 int fibnum;
235
236 KASSERT(m != NULL, ("%s: m is NULL", __func__));
237 KASSERT(proto != NULL, ("%s: proto is NULL", __func__));
238 KASSERT(rp != NULL, ("%s: rp is NULL", __func__));
239
240 /* No filtering requested. */
241 if ((m->m_flags & RTS_FILTER_FIB) == 0)
242 return (0);
243
244 /* Check if it is a rts and the fib matches the one of the socket. */
245 fibnum = M_GETFIB(m);
246 if (proto->sp_family != PF_ROUTE ||
247 rp->rcb_socket == NULL ||
248 rp->rcb_socket->so_fibnum == fibnum)
249 return (0);
250
251 /* Filtering requested and no match, the socket shall be skipped. */
252 return (1);
253 }
254
255 static void
256 rts_input(struct mbuf *m)
257 {
258 struct sockproto route_proto;
259 unsigned short *family;
260 struct m_tag *tag;
261
262 route_proto.sp_family = PF_ROUTE;
263 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
264 if (tag != NULL) {
265 family = (unsigned short *)(tag + 1);
266 route_proto.sp_protocol = *family;
267 m_tag_delete(m, tag);
268 } else
269 route_proto.sp_protocol = 0;
270
271 raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb);
272 }
273
274 /*
275 * It really doesn't make any sense at all for this code to share much
276 * with raw_usrreq.c, since its functionality is so restricted. XXX
277 */
278 static void
279 rts_abort(struct socket *so)
280 {
281
282 raw_usrreqs.pru_abort(so);
283 }
284
285 static void
286 rts_close(struct socket *so)
287 {
288
289 raw_usrreqs.pru_close(so);
290 }
291
292 /* pru_accept is EOPNOTSUPP */
293
294 static int
295 rts_attach(struct socket *so, int proto, struct thread *td)
296 {
297 struct rawcb *rp;
298 int error;
299
300 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
301
302 /* XXX */
303 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
304
305 so->so_pcb = (caddr_t)rp;
306 so->so_fibnum = td->td_proc->p_fibnum;
307 error = raw_attach(so, proto);
308 rp = sotorawcb(so);
309 if (error) {
310 so->so_pcb = NULL;
311 free(rp, M_PCB);
312 return error;
313 }
314 RTSOCK_LOCK();
315 switch(rp->rcb_proto.sp_protocol) {
316 case AF_INET:
317 V_route_cb.ip_count++;
318 break;
319 case AF_INET6:
320 V_route_cb.ip6_count++;
321 break;
322 }
323 V_route_cb.any_count++;
324 RTSOCK_UNLOCK();
325 soisconnected(so);
326 so->so_options |= SO_USELOOPBACK;
327 return 0;
328 }
329
330 static int
331 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
332 {
333
334 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
335 }
336
337 static int
338 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
339 {
340
341 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
342 }
343
344 /* pru_connect2 is EOPNOTSUPP */
345 /* pru_control is EOPNOTSUPP */
346
347 static void
348 rts_detach(struct socket *so)
349 {
350 struct rawcb *rp = sotorawcb(so);
351
352 KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
353
354 RTSOCK_LOCK();
355 switch(rp->rcb_proto.sp_protocol) {
356 case AF_INET:
357 V_route_cb.ip_count--;
358 break;
359 case AF_INET6:
360 V_route_cb.ip6_count--;
361 break;
362 }
363 V_route_cb.any_count--;
364 RTSOCK_UNLOCK();
365 raw_usrreqs.pru_detach(so);
366 }
367
368 static int
369 rts_disconnect(struct socket *so)
370 {
371
372 return (raw_usrreqs.pru_disconnect(so));
373 }
374
375 /* pru_listen is EOPNOTSUPP */
376
377 static int
378 rts_peeraddr(struct socket *so, struct sockaddr **nam)
379 {
380
381 return (raw_usrreqs.pru_peeraddr(so, nam));
382 }
383
384 /* pru_rcvd is EOPNOTSUPP */
385 /* pru_rcvoob is EOPNOTSUPP */
386
387 static int
388 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
389 struct mbuf *control, struct thread *td)
390 {
391
392 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
393 }
394
395 /* pru_sense is null */
396
397 static int
398 rts_shutdown(struct socket *so)
399 {
400
401 return (raw_usrreqs.pru_shutdown(so));
402 }
403
404 static int
405 rts_sockaddr(struct socket *so, struct sockaddr **nam)
406 {
407
408 return (raw_usrreqs.pru_sockaddr(so, nam));
409 }
410
411 static struct pr_usrreqs route_usrreqs = {
412 .pru_abort = rts_abort,
413 .pru_attach = rts_attach,
414 .pru_bind = rts_bind,
415 .pru_connect = rts_connect,
416 .pru_detach = rts_detach,
417 .pru_disconnect = rts_disconnect,
418 .pru_peeraddr = rts_peeraddr,
419 .pru_send = rts_send,
420 .pru_shutdown = rts_shutdown,
421 .pru_sockaddr = rts_sockaddr,
422 .pru_close = rts_close,
423 };
424
425 #ifndef _SOCKADDR_UNION_DEFINED
426 #define _SOCKADDR_UNION_DEFINED
427 /*
428 * The union of all possible address formats we handle.
429 */
430 union sockaddr_union {
431 struct sockaddr sa;
432 struct sockaddr_in sin;
433 struct sockaddr_in6 sin6;
434 };
435 #endif /* _SOCKADDR_UNION_DEFINED */
436
437 static int
438 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
439 struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred)
440 {
441
442 /* First, see if the returned address is part of the jail. */
443 if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) {
444 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
445 return (0);
446 }
447
448 switch (info->rti_info[RTAX_DST]->sa_family) {
449 #ifdef INET
450 case AF_INET:
451 {
452 struct in_addr ia;
453 struct ifaddr *ifa;
454 int found;
455
456 found = 0;
457 /*
458 * Try to find an address on the given outgoing interface
459 * that belongs to the jail.
460 */
461 IF_ADDR_RLOCK(ifp);
462 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
463 struct sockaddr *sa;
464 sa = ifa->ifa_addr;
465 if (sa->sa_family != AF_INET)
466 continue;
467 ia = ((struct sockaddr_in *)sa)->sin_addr;
468 if (prison_check_ip4(cred, &ia) == 0) {
469 found = 1;
470 break;
471 }
472 }
473 IF_ADDR_RUNLOCK(ifp);
474 if (!found) {
475 /*
476 * As a last resort return the 'default' jail address.
477 */
478 ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->
479 sin_addr;
480 if (prison_get_ip4(cred, &ia) != 0)
481 return (ESRCH);
482 }
483 bzero(&saun->sin, sizeof(struct sockaddr_in));
484 saun->sin.sin_len = sizeof(struct sockaddr_in);
485 saun->sin.sin_family = AF_INET;
486 saun->sin.sin_addr.s_addr = ia.s_addr;
487 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
488 break;
489 }
490 #endif
491 #ifdef INET6
492 case AF_INET6:
493 {
494 struct in6_addr ia6;
495 struct ifaddr *ifa;
496 int found;
497
498 found = 0;
499 /*
500 * Try to find an address on the given outgoing interface
501 * that belongs to the jail.
502 */
503 IF_ADDR_RLOCK(ifp);
504 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
505 struct sockaddr *sa;
506 sa = ifa->ifa_addr;
507 if (sa->sa_family != AF_INET6)
508 continue;
509 bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
510 &ia6, sizeof(struct in6_addr));
511 if (prison_check_ip6(cred, &ia6) == 0) {
512 found = 1;
513 break;
514 }
515 }
516 IF_ADDR_RUNLOCK(ifp);
517 if (!found) {
518 /*
519 * As a last resort return the 'default' jail address.
520 */
521 ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)->
522 sin6_addr;
523 if (prison_get_ip6(cred, &ia6) != 0)
524 return (ESRCH);
525 }
526 bzero(&saun->sin6, sizeof(struct sockaddr_in6));
527 saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
528 saun->sin6.sin6_family = AF_INET6;
529 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
530 if (sa6_recoverscope(&saun->sin6) != 0)
531 return (ESRCH);
532 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
533 break;
534 }
535 #endif
536 default:
537 return (ESRCH);
538 }
539 return (0);
540 }
541
542 /*ARGSUSED*/
543 static int
544 route_output(struct mbuf *m, struct socket *so, ...)
545 {
546 struct rt_msghdr *rtm = NULL;
547 struct rtentry *rt = NULL;
548 struct rib_head *rnh;
549 struct rt_addrinfo info;
550 struct sockaddr_storage ss;
551 #ifdef INET6
552 struct sockaddr_in6 *sin6;
553 int i, rti_need_deembed = 0;
554 #endif
555 int alloc_len = 0, len, error = 0, fibnum;
556 struct ifnet *ifp = NULL;
557 union sockaddr_union saun;
558 sa_family_t saf = AF_UNSPEC;
559 struct rawcb *rp = NULL;
560 struct walkarg w;
561
562 fibnum = so->so_fibnum;
563
564 #define senderr(e) { error = e; goto flush;}
565 if (m == NULL || ((m->m_len < sizeof(long)) &&
566 (m = m_pullup(m, sizeof(long))) == NULL))
567 return (ENOBUFS);
568 if ((m->m_flags & M_PKTHDR) == 0)
569 panic("route_output");
570 len = m->m_pkthdr.len;
571 if (len < sizeof(*rtm) ||
572 len != mtod(m, struct rt_msghdr *)->rtm_msglen)
573 senderr(EINVAL);
574
575 /*
576 * Most of current messages are in range 200-240 bytes,
577 * minimize possible re-allocation on reply using larger size
578 * buffer aligned on 1k boundaty.
579 */
580 alloc_len = roundup2(len, 1024);
581 if ((rtm = malloc(alloc_len, M_TEMP, M_NOWAIT)) == NULL)
582 senderr(ENOBUFS);
583
584 m_copydata(m, 0, len, (caddr_t)rtm);
585 bzero(&info, sizeof(info));
586 bzero(&w, sizeof(w));
587
588 if (rtm->rtm_version != RTM_VERSION) {
589 /* Do not touch message since format is unknown */
590 free(rtm, M_TEMP);
591 rtm = NULL;
592 senderr(EPROTONOSUPPORT);
593 }
594
595 /*
596 * Starting from here, it is possible
597 * to alter original message and insert
598 * caller PID and error value.
599 */
600
601 rtm->rtm_pid = curproc->p_pid;
602 info.rti_addrs = rtm->rtm_addrs;
603
604 info.rti_mflags = rtm->rtm_inits;
605 info.rti_rmx = &rtm->rtm_rmx;
606
607 /*
608 * rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6
609 * link-local address because rtrequest requires addresses with
610 * embedded scope id.
611 */
612 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info))
613 senderr(EINVAL);
614
615 info.rti_flags = rtm->rtm_flags;
616 if (info.rti_info[RTAX_DST] == NULL ||
617 info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
618 (info.rti_info[RTAX_GATEWAY] != NULL &&
619 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
620 senderr(EINVAL);
621 saf = info.rti_info[RTAX_DST]->sa_family;
622 /*
623 * Verify that the caller has the appropriate privilege; RTM_GET
624 * is the only operation the non-superuser is allowed.
625 */
626 if (rtm->rtm_type != RTM_GET) {
627 error = priv_check(curthread, PRIV_NET_ROUTE);
628 if (error)
629 senderr(error);
630 }
631
632 /*
633 * The given gateway address may be an interface address.
634 * For example, issuing a "route change" command on a route
635 * entry that was created from a tunnel, and the gateway
636 * address given is the local end point. In this case the
637 * RTF_GATEWAY flag must be cleared or the destination will
638 * not be reachable even though there is no error message.
639 */
640 if (info.rti_info[RTAX_GATEWAY] != NULL &&
641 info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
642 struct rt_addrinfo ginfo;
643 struct sockaddr *gdst;
644
645 bzero(&ginfo, sizeof(ginfo));
646 bzero(&ss, sizeof(ss));
647 ss.ss_len = sizeof(ss);
648
649 ginfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ss;
650 gdst = info.rti_info[RTAX_GATEWAY];
651
652 /*
653 * A host route through the loopback interface is
654 * installed for each interface adddress. In pre 8.0
655 * releases the interface address of a PPP link type
656 * is not reachable locally. This behavior is fixed as
657 * part of the new L2/L3 redesign and rewrite work. The
658 * signature of this interface address route is the
659 * AF_LINK sa_family type of the rt_gateway, and the
660 * rt_ifp has the IFF_LOOPBACK flag set.
661 */
662 if (rib_lookup_info(fibnum, gdst, NHR_REF, 0, &ginfo) == 0) {
663 if (ss.ss_family == AF_LINK &&
664 ginfo.rti_ifp->if_flags & IFF_LOOPBACK) {
665 info.rti_flags &= ~RTF_GATEWAY;
666 info.rti_flags |= RTF_GWFLAG_COMPAT;
667 }
668 rib_free_info(&ginfo);
669 }
670 }
671
672 switch (rtm->rtm_type) {
673 struct rtentry *saved_nrt;
674
675 case RTM_ADD:
676 case RTM_CHANGE:
677 if (info.rti_info[RTAX_GATEWAY] == NULL)
678 senderr(EINVAL);
679 saved_nrt = NULL;
680
681 /* support for new ARP code */
682 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
683 (rtm->rtm_flags & RTF_LLDATA) != 0) {
684 error = lla_rt_output(rtm, &info);
685 #ifdef INET6
686 if (error == 0)
687 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
688 #endif
689 break;
690 }
691 error = rtrequest1_fib(rtm->rtm_type, &info, &saved_nrt,
692 fibnum);
693 if (error == 0 && saved_nrt != NULL) {
694 #ifdef INET6
695 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
696 #endif
697 RT_LOCK(saved_nrt);
698 rtm->rtm_index = saved_nrt->rt_ifp->if_index;
699 RT_REMREF(saved_nrt);
700 RT_UNLOCK(saved_nrt);
701 }
702 break;
703
704 case RTM_DELETE:
705 saved_nrt = NULL;
706 /* support for new ARP code */
707 if (info.rti_info[RTAX_GATEWAY] &&
708 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
709 (rtm->rtm_flags & RTF_LLDATA) != 0) {
710 error = lla_rt_output(rtm, &info);
711 #ifdef INET6
712 if (error == 0)
713 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
714 #endif
715 break;
716 }
717 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, fibnum);
718 if (error == 0) {
719 RT_LOCK(saved_nrt);
720 rt = saved_nrt;
721 goto report;
722 }
723 #ifdef INET6
724 /* rt_msg2() will not be used when RTM_DELETE fails. */
725 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
726 #endif
727 break;
728
729 case RTM_GET:
730 rnh = rt_tables_get_rnh(fibnum, saf);
731 if (rnh == NULL)
732 senderr(EAFNOSUPPORT);
733
734 RIB_RLOCK(rnh);
735
736 if (info.rti_info[RTAX_NETMASK] == NULL &&
737 rtm->rtm_type == RTM_GET) {
738 /*
739 * Provide longest prefix match for
740 * address lookup (no mask).
741 * 'route -n get addr'
742 */
743 rt = (struct rtentry *) rnh->rnh_matchaddr(
744 info.rti_info[RTAX_DST], &rnh->head);
745 } else
746 rt = (struct rtentry *) rnh->rnh_lookup(
747 info.rti_info[RTAX_DST],
748 info.rti_info[RTAX_NETMASK], &rnh->head);
749
750 if (rt == NULL) {
751 RIB_RUNLOCK(rnh);
752 senderr(ESRCH);
753 }
754 #ifdef RADIX_MPATH
755 /*
756 * for RTM_CHANGE/LOCK, if we got multipath routes,
757 * we require users to specify a matching RTAX_GATEWAY.
758 *
759 * for RTM_GET, gate is optional even with multipath.
760 * if gate == NULL the first match is returned.
761 * (no need to call rt_mpath_matchgate if gate == NULL)
762 */
763 if (rt_mpath_capable(rnh) &&
764 (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
765 rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
766 if (!rt) {
767 RIB_RUNLOCK(rnh);
768 senderr(ESRCH);
769 }
770 }
771 #endif
772 /*
773 * If performing proxied L2 entry insertion, and
774 * the actual PPP host entry is found, perform
775 * another search to retrieve the prefix route of
776 * the local end point of the PPP link.
777 */
778 if (rtm->rtm_flags & RTF_ANNOUNCE) {
779 struct sockaddr laddr;
780
781 if (rt->rt_ifp != NULL &&
782 rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
783 struct ifaddr *ifa;
784
785 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1,
786 RT_ALL_FIBS);
787 if (ifa != NULL)
788 rt_maskedcopy(ifa->ifa_addr,
789 &laddr,
790 ifa->ifa_netmask);
791 } else
792 rt_maskedcopy(rt->rt_ifa->ifa_addr,
793 &laddr,
794 rt->rt_ifa->ifa_netmask);
795 /*
796 * refactor rt and no lock operation necessary
797 */
798 rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr,
799 &rnh->head);
800 if (rt == NULL) {
801 RIB_RUNLOCK(rnh);
802 senderr(ESRCH);
803 }
804 }
805 RT_LOCK(rt);
806 RT_ADDREF(rt);
807 RIB_RUNLOCK(rnh);
808
809 report:
810 RT_LOCK_ASSERT(rt);
811 if ((rt->rt_flags & RTF_HOST) == 0
812 ? jailed_without_vnet(curthread->td_ucred)
813 : prison_if(curthread->td_ucred,
814 rt_key(rt)) != 0) {
815 RT_UNLOCK(rt);
816 senderr(ESRCH);
817 }
818 info.rti_info[RTAX_DST] = rt_key(rt);
819 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
820 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt),
821 rt_mask(rt), &ss);
822 info.rti_info[RTAX_GENMASK] = 0;
823 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
824 ifp = rt->rt_ifp;
825 if (ifp) {
826 info.rti_info[RTAX_IFP] =
827 ifp->if_addr->ifa_addr;
828 error = rtm_get_jailed(&info, ifp, rt,
829 &saun, curthread->td_ucred);
830 if (error != 0) {
831 RT_UNLOCK(rt);
832 senderr(error);
833 }
834 if (ifp->if_flags & IFF_POINTOPOINT)
835 info.rti_info[RTAX_BRD] =
836 rt->rt_ifa->ifa_dstaddr;
837 rtm->rtm_index = ifp->if_index;
838 } else {
839 info.rti_info[RTAX_IFP] = NULL;
840 info.rti_info[RTAX_IFA] = NULL;
841 }
842 } else if ((ifp = rt->rt_ifp) != NULL) {
843 rtm->rtm_index = ifp->if_index;
844 }
845
846 /* Check if we need to realloc storage */
847 rtsock_msg_buffer(rtm->rtm_type, &info, NULL, &len);
848 if (len > alloc_len) {
849 struct rt_msghdr *new_rtm;
850 new_rtm = malloc(len, M_TEMP, M_NOWAIT);
851 if (new_rtm == NULL) {
852 RT_UNLOCK(rt);
853 senderr(ENOBUFS);
854 }
855 bcopy(rtm, new_rtm, rtm->rtm_msglen);
856 free(rtm, M_TEMP);
857 rtm = new_rtm;
858 alloc_len = len;
859 }
860
861 w.w_tmem = (caddr_t)rtm;
862 w.w_tmemsize = alloc_len;
863 rtsock_msg_buffer(rtm->rtm_type, &info, &w, &len);
864
865 if (rt->rt_flags & RTF_GWFLAG_COMPAT)
866 rtm->rtm_flags = RTF_GATEWAY |
867 (rt->rt_flags & ~RTF_GWFLAG_COMPAT);
868 else
869 rtm->rtm_flags = rt->rt_flags;
870 rt_getmetrics(rt, &rtm->rtm_rmx);
871 rtm->rtm_addrs = info.rti_addrs;
872
873 RT_UNLOCK(rt);
874 break;
875
876 default:
877 senderr(EOPNOTSUPP);
878 }
879
880 flush:
881 if (rt != NULL)
882 RTFREE(rt);
883 /*
884 * Check to see if we don't want our own messages.
885 */
886 if ((so->so_options & SO_USELOOPBACK) == 0) {
887 if (V_route_cb.any_count <= 1) {
888 if (rtm != NULL)
889 free(rtm, M_TEMP);
890 m_freem(m);
891 return (error);
892 }
893 /* There is another listener, so construct message */
894 rp = sotorawcb(so);
895 }
896
897 if (rtm != NULL) {
898 #ifdef INET6
899 if (rti_need_deembed) {
900 /* sin6_scope_id is recovered before sending rtm. */
901 sin6 = (struct sockaddr_in6 *)&ss;
902 for (i = 0; i < RTAX_MAX; i++) {
903 if (info.rti_info[i] == NULL)
904 continue;
905 if (info.rti_info[i]->sa_family != AF_INET6)
906 continue;
907 bcopy(info.rti_info[i], sin6, sizeof(*sin6));
908 if (sa6_recoverscope(sin6) == 0)
909 bcopy(sin6, info.rti_info[i],
910 sizeof(*sin6));
911 }
912 }
913 #endif
914 if (error != 0)
915 rtm->rtm_errno = error;
916 else
917 rtm->rtm_flags |= RTF_DONE;
918
919 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
920 if (m->m_pkthdr.len < rtm->rtm_msglen) {
921 m_freem(m);
922 m = NULL;
923 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
924 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
925
926 free(rtm, M_TEMP);
927 }
928 if (m != NULL) {
929 M_SETFIB(m, fibnum);
930 m->m_flags |= RTS_FILTER_FIB;
931 if (rp) {
932 /*
933 * XXX insure we don't get a copy by
934 * invalidating our protocol
935 */
936 unsigned short family = rp->rcb_proto.sp_family;
937 rp->rcb_proto.sp_family = 0;
938 rt_dispatch(m, saf);
939 rp->rcb_proto.sp_family = family;
940 } else
941 rt_dispatch(m, saf);
942 }
943
944 return (error);
945 }
946
947 static void
948 rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out)
949 {
950
951 bzero(out, sizeof(*out));
952 out->rmx_mtu = rt->rt_mtu;
953 out->rmx_weight = rt->rt_weight;
954 out->rmx_pksent = counter_u64_fetch(rt->rt_pksent);
955 /* Kernel -> userland timebase conversion. */
956 out->rmx_expire = rt->rt_expire ?
957 rt->rt_expire - time_uptime + time_second : 0;
958 }
959
960 /*
961 * Extract the addresses of the passed sockaddrs.
962 * Do a little sanity checking so as to avoid bad memory references.
963 * This data is derived straight from userland.
964 */
965 static int
966 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
967 {
968 struct sockaddr *sa;
969 int i;
970
971 for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
972 if ((rtinfo->rti_addrs & (1 << i)) == 0)
973 continue;
974 sa = (struct sockaddr *)cp;
975 /*
976 * It won't fit.
977 */
978 if (cp + sa->sa_len > cplim)
979 return (EINVAL);
980 /*
981 * there are no more.. quit now
982 * If there are more bits, they are in error.
983 * I've seen this. route(1) can evidently generate these.
984 * This causes kernel to core dump.
985 * for compatibility, If we see this, point to a safe address.
986 */
987 if (sa->sa_len == 0) {
988 rtinfo->rti_info[i] = &sa_zero;
989 return (0); /* should be EINVAL but for compat */
990 }
991 /* accept it */
992 #ifdef INET6
993 if (sa->sa_family == AF_INET6)
994 sa6_embedscope((struct sockaddr_in6 *)sa,
995 V_ip6_use_defzone);
996 #endif
997 rtinfo->rti_info[i] = sa;
998 cp += SA_SIZE(sa);
999 }
1000 return (0);
1001 }
1002
1003 /*
1004 * Fill in @dmask with valid netmask leaving original @smask
1005 * intact. Mostly used with radix netmasks.
1006 */
1007 static struct sockaddr *
1008 rtsock_fix_netmask(struct sockaddr *dst, struct sockaddr *smask,
1009 struct sockaddr_storage *dmask)
1010 {
1011 if (dst == NULL || smask == NULL)
1012 return (NULL);
1013
1014 memset(dmask, 0, dst->sa_len);
1015 memcpy(dmask, smask, smask->sa_len);
1016 dmask->ss_len = dst->sa_len;
1017 dmask->ss_family = dst->sa_family;
1018
1019 return ((struct sockaddr *)dmask);
1020 }
1021
1022 /*
1023 * Writes information related to @rtinfo object to newly-allocated mbuf.
1024 * Assumes MCLBYTES is enough to construct any message.
1025 * Used for OS notifications of vaious events (if/ifa announces,etc)
1026 *
1027 * Returns allocated mbuf or NULL on failure.
1028 */
1029 static struct mbuf *
1030 rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
1031 {
1032 struct rt_msghdr *rtm;
1033 struct mbuf *m;
1034 int i;
1035 struct sockaddr *sa;
1036 #ifdef INET6
1037 struct sockaddr_storage ss;
1038 struct sockaddr_in6 *sin6;
1039 #endif
1040 int len, dlen;
1041
1042 switch (type) {
1043
1044 case RTM_DELADDR:
1045 case RTM_NEWADDR:
1046 len = sizeof(struct ifa_msghdr);
1047 break;
1048
1049 case RTM_DELMADDR:
1050 case RTM_NEWMADDR:
1051 len = sizeof(struct ifma_msghdr);
1052 break;
1053
1054 case RTM_IFINFO:
1055 len = sizeof(struct if_msghdr);
1056 break;
1057
1058 case RTM_IFANNOUNCE:
1059 case RTM_IEEE80211:
1060 len = sizeof(struct if_announcemsghdr);
1061 break;
1062
1063 default:
1064 len = sizeof(struct rt_msghdr);
1065 }
1066
1067 /* XXXGL: can we use MJUMPAGESIZE cluster here? */
1068 KASSERT(len <= MCLBYTES, ("%s: message too big", __func__));
1069 if (len > MHLEN)
1070 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1071 else
1072 m = m_gethdr(M_NOWAIT, MT_DATA);
1073 if (m == NULL)
1074 return (m);
1075
1076 m->m_pkthdr.len = m->m_len = len;
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 #ifdef INET6
1085 if (V_deembed_scopeid && sa->sa_family == AF_INET6) {
1086 sin6 = (struct sockaddr_in6 *)&ss;
1087 bcopy(sa, sin6, sizeof(*sin6));
1088 if (sa6_recoverscope(sin6) == 0)
1089 sa = (struct sockaddr *)sin6;
1090 }
1091 #endif
1092 m_copyback(m, len, dlen, (caddr_t)sa);
1093 len += dlen;
1094 }
1095 if (m->m_pkthdr.len != len) {
1096 m_freem(m);
1097 return (NULL);
1098 }
1099 rtm->rtm_msglen = len;
1100 rtm->rtm_version = RTM_VERSION;
1101 rtm->rtm_type = type;
1102 return (m);
1103 }
1104
1105 /*
1106 * Writes information related to @rtinfo object to preallocated buffer.
1107 * Stores needed size in @plen. If @w is NULL, calculates size without
1108 * writing.
1109 * Used for sysctl dumps and rtsock answers (RTM_DEL/RTM_GET) generation.
1110 *
1111 * Returns 0 on success.
1112 *
1113 */
1114 static int
1115 rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, struct walkarg *w, int *plen)
1116 {
1117 int i;
1118 int len, buflen = 0, dlen;
1119 caddr_t cp = NULL;
1120 struct rt_msghdr *rtm = NULL;
1121 #ifdef INET6
1122 struct sockaddr_storage ss;
1123 struct sockaddr_in6 *sin6;
1124 #endif
1125 #ifdef COMPAT_FREEBSD32
1126 bool compat32 = false;
1127 #endif
1128
1129 switch (type) {
1130
1131 case RTM_DELADDR:
1132 case RTM_NEWADDR:
1133 if (w != NULL && w->w_op == NET_RT_IFLISTL) {
1134 #ifdef COMPAT_FREEBSD32
1135 if (w->w_req->flags & SCTL_MASK32) {
1136 len = sizeof(struct ifa_msghdrl32);
1137 compat32 = true;
1138 } else
1139 #endif
1140 len = sizeof(struct ifa_msghdrl);
1141 } else
1142 len = sizeof(struct ifa_msghdr);
1143 break;
1144
1145 case RTM_IFINFO:
1146 #ifdef COMPAT_FREEBSD32
1147 if (w != NULL && w->w_req->flags & SCTL_MASK32) {
1148 if (w->w_op == NET_RT_IFLISTL)
1149 len = sizeof(struct if_msghdrl32);
1150 else
1151 len = sizeof(struct if_msghdr32);
1152 compat32 = true;
1153 break;
1154 }
1155 #endif
1156 if (w != NULL && w->w_op == NET_RT_IFLISTL)
1157 len = sizeof(struct if_msghdrl);
1158 else
1159 len = sizeof(struct if_msghdr);
1160 break;
1161
1162 case RTM_NEWMADDR:
1163 len = sizeof(struct ifma_msghdr);
1164 break;
1165
1166 default:
1167 len = sizeof(struct rt_msghdr);
1168 }
1169
1170 if (w != NULL) {
1171 rtm = (struct rt_msghdr *)w->w_tmem;
1172 buflen = w->w_tmemsize - len;
1173 cp = (caddr_t)w->w_tmem + len;
1174 }
1175
1176 rtinfo->rti_addrs = 0;
1177 for (i = 0; i < RTAX_MAX; i++) {
1178 struct sockaddr *sa;
1179
1180 if ((sa = rtinfo->rti_info[i]) == NULL)
1181 continue;
1182 rtinfo->rti_addrs |= (1 << i);
1183 #ifdef COMPAT_FREEBSD32
1184 if (compat32)
1185 dlen = SA_SIZE32(sa);
1186 else
1187 #endif
1188 dlen = SA_SIZE(sa);
1189 if (cp != NULL && buflen >= dlen) {
1190 #ifdef INET6
1191 if (V_deembed_scopeid && sa->sa_family == AF_INET6) {
1192 sin6 = (struct sockaddr_in6 *)&ss;
1193 bcopy(sa, sin6, sizeof(*sin6));
1194 if (sa6_recoverscope(sin6) == 0)
1195 sa = (struct sockaddr *)sin6;
1196 }
1197 #endif
1198 bcopy((caddr_t)sa, cp, (unsigned)dlen);
1199 cp += dlen;
1200 buflen -= dlen;
1201 } else if (cp != NULL) {
1202 /*
1203 * Buffer too small. Count needed size
1204 * and return with error.
1205 */
1206 cp = NULL;
1207 }
1208
1209 len += dlen;
1210 }
1211
1212 if (cp != NULL) {
1213 dlen = ALIGN(len) - len;
1214 if (buflen < dlen)
1215 cp = NULL;
1216 else {
1217 bzero(cp, dlen);
1218 cp += dlen;
1219 buflen -= dlen;
1220 }
1221 }
1222 len = ALIGN(len);
1223
1224 if (cp != NULL) {
1225 /* fill header iff buffer is large enough */
1226 rtm->rtm_version = RTM_VERSION;
1227 rtm->rtm_type = type;
1228 rtm->rtm_msglen = len;
1229 }
1230
1231 *plen = len;
1232
1233 if (w != NULL && cp == NULL)
1234 return (ENOBUFS);
1235
1236 return (0);
1237 }
1238
1239 /*
1240 * This routine is called to generate a message from the routing
1241 * socket indicating that a redirect has occurred, a routing lookup
1242 * has failed, or that a protocol has detected timeouts to a particular
1243 * destination.
1244 */
1245 void
1246 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error,
1247 int fibnum)
1248 {
1249 struct rt_msghdr *rtm;
1250 struct mbuf *m;
1251 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
1252
1253 if (V_route_cb.any_count == 0)
1254 return;
1255 m = rtsock_msg_mbuf(type, rtinfo);
1256 if (m == NULL)
1257 return;
1258
1259 if (fibnum != RT_ALL_FIBS) {
1260 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
1261 "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
1262 M_SETFIB(m, fibnum);
1263 m->m_flags |= RTS_FILTER_FIB;
1264 }
1265
1266 rtm = mtod(m, struct rt_msghdr *);
1267 rtm->rtm_flags = RTF_DONE | flags;
1268 rtm->rtm_errno = error;
1269 rtm->rtm_addrs = rtinfo->rti_addrs;
1270 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1271 }
1272
1273 void
1274 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
1275 {
1276
1277 rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS);
1278 }
1279
1280 /*
1281 * This routine is called to generate a message from the routing
1282 * socket indicating that the status of a network interface has changed.
1283 */
1284 void
1285 rt_ifmsg(struct ifnet *ifp)
1286 {
1287 struct if_msghdr *ifm;
1288 struct mbuf *m;
1289 struct rt_addrinfo info;
1290
1291 if (V_route_cb.any_count == 0)
1292 return;
1293 bzero((caddr_t)&info, sizeof(info));
1294 m = rtsock_msg_mbuf(RTM_IFINFO, &info);
1295 if (m == NULL)
1296 return;
1297 ifm = mtod(m, struct if_msghdr *);
1298 ifm->ifm_index = ifp->if_index;
1299 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1300 if_data_copy(ifp, &ifm->ifm_data);
1301 ifm->ifm_addrs = 0;
1302 rt_dispatch(m, AF_UNSPEC);
1303 }
1304
1305 /*
1306 * Announce interface address arrival/withdraw.
1307 * Please do not call directly, use rt_addrmsg().
1308 * Assume input data to be valid.
1309 * Returns 0 on success.
1310 */
1311 int
1312 rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
1313 {
1314 struct rt_addrinfo info;
1315 struct sockaddr *sa;
1316 int ncmd;
1317 struct mbuf *m;
1318 struct ifa_msghdr *ifam;
1319 struct ifnet *ifp = ifa->ifa_ifp;
1320 struct sockaddr_storage ss;
1321
1322 if (V_route_cb.any_count == 0)
1323 return (0);
1324
1325 ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
1326
1327 bzero((caddr_t)&info, sizeof(info));
1328 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
1329 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
1330 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(
1331 info.rti_info[RTAX_IFP], ifa->ifa_netmask, &ss);
1332 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1333 if ((m = rtsock_msg_mbuf(ncmd, &info)) == NULL)
1334 return (ENOBUFS);
1335 ifam = mtod(m, struct ifa_msghdr *);
1336 ifam->ifam_index = ifp->if_index;
1337 ifam->ifam_metric = ifa->ifa_ifp->if_metric;
1338 ifam->ifam_flags = ifa->ifa_flags;
1339 ifam->ifam_addrs = info.rti_addrs;
1340
1341 if (fibnum != RT_ALL_FIBS) {
1342 M_SETFIB(m, fibnum);
1343 m->m_flags |= RTS_FILTER_FIB;
1344 }
1345
1346 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1347
1348 return (0);
1349 }
1350
1351 /*
1352 * Announce route addition/removal.
1353 * Please do not call directly, use rt_routemsg().
1354 * Note that @rt data MAY be inconsistent/invalid:
1355 * if some userland app sends us "invalid" route message (invalid mask,
1356 * no dst, wrong address families, etc...) we need to pass it back
1357 * to app (and any other rtsock consumers) with rtm_errno field set to
1358 * non-zero value.
1359 *
1360 * Returns 0 on success.
1361 */
1362 int
1363 rtsock_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt,
1364 int fibnum)
1365 {
1366 struct rt_addrinfo info;
1367 struct sockaddr *sa;
1368 struct mbuf *m;
1369 struct rt_msghdr *rtm;
1370 struct sockaddr_storage ss;
1371
1372 if (V_route_cb.any_count == 0)
1373 return (0);
1374
1375 bzero((caddr_t)&info, sizeof(info));
1376 info.rti_info[RTAX_DST] = sa = rt_key(rt);
1377 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(sa, rt_mask(rt), &ss);
1378 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1379 if ((m = rtsock_msg_mbuf(cmd, &info)) == NULL)
1380 return (ENOBUFS);
1381 rtm = mtod(m, struct rt_msghdr *);
1382 rtm->rtm_index = ifp->if_index;
1383 rtm->rtm_flags |= rt->rt_flags;
1384 rtm->rtm_errno = error;
1385 rtm->rtm_addrs = info.rti_addrs;
1386
1387 if (fibnum != RT_ALL_FIBS) {
1388 M_SETFIB(m, fibnum);
1389 m->m_flags |= RTS_FILTER_FIB;
1390 }
1391
1392 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1393
1394 return (0);
1395 }
1396
1397 /*
1398 * This is the analogue to the rt_newaddrmsg which performs the same
1399 * function but for multicast group memberhips. This is easier since
1400 * there is no route state to worry about.
1401 */
1402 void
1403 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1404 {
1405 struct rt_addrinfo info;
1406 struct mbuf *m = NULL;
1407 struct ifnet *ifp = ifma->ifma_ifp;
1408 struct ifma_msghdr *ifmam;
1409
1410 if (V_route_cb.any_count == 0)
1411 return;
1412
1413 bzero((caddr_t)&info, sizeof(info));
1414 info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1415 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
1416 /*
1417 * If a link-layer address is present, present it as a ``gateway''
1418 * (similarly to how ARP entries, e.g., are presented).
1419 */
1420 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
1421 m = rtsock_msg_mbuf(cmd, &info);
1422 if (m == NULL)
1423 return;
1424 ifmam = mtod(m, struct ifma_msghdr *);
1425 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
1426 __func__));
1427 ifmam->ifmam_index = ifp->if_index;
1428 ifmam->ifmam_addrs = info.rti_addrs;
1429 rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC);
1430 }
1431
1432 static struct mbuf *
1433 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1434 struct rt_addrinfo *info)
1435 {
1436 struct if_announcemsghdr *ifan;
1437 struct mbuf *m;
1438
1439 if (V_route_cb.any_count == 0)
1440 return NULL;
1441 bzero((caddr_t)info, sizeof(*info));
1442 m = rtsock_msg_mbuf(type, info);
1443 if (m != NULL) {
1444 ifan = mtod(m, struct if_announcemsghdr *);
1445 ifan->ifan_index = ifp->if_index;
1446 strlcpy(ifan->ifan_name, ifp->if_xname,
1447 sizeof(ifan->ifan_name));
1448 ifan->ifan_what = what;
1449 }
1450 return m;
1451 }
1452
1453 /*
1454 * This is called to generate routing socket messages indicating
1455 * IEEE80211 wireless events.
1456 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1457 */
1458 void
1459 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1460 {
1461 struct mbuf *m;
1462 struct rt_addrinfo info;
1463
1464 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1465 if (m != NULL) {
1466 /*
1467 * Append the ieee80211 data. Try to stick it in the
1468 * mbuf containing the ifannounce msg; otherwise allocate
1469 * a new mbuf and append.
1470 *
1471 * NB: we assume m is a single mbuf.
1472 */
1473 if (data_len > M_TRAILINGSPACE(m)) {
1474 struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
1475 if (n == NULL) {
1476 m_freem(m);
1477 return;
1478 }
1479 bcopy(data, mtod(n, void *), data_len);
1480 n->m_len = data_len;
1481 m->m_next = n;
1482 } else if (data_len > 0) {
1483 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1484 m->m_len += data_len;
1485 }
1486 if (m->m_flags & M_PKTHDR)
1487 m->m_pkthdr.len += data_len;
1488 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1489 rt_dispatch(m, AF_UNSPEC);
1490 }
1491 }
1492
1493 /*
1494 * This is called to generate routing socket messages indicating
1495 * network interface arrival and departure.
1496 */
1497 void
1498 rt_ifannouncemsg(struct ifnet *ifp, int what)
1499 {
1500 struct mbuf *m;
1501 struct rt_addrinfo info;
1502
1503 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
1504 if (m != NULL)
1505 rt_dispatch(m, AF_UNSPEC);
1506 }
1507
1508 static void
1509 rt_dispatch(struct mbuf *m, sa_family_t saf)
1510 {
1511 struct m_tag *tag;
1512
1513 /*
1514 * Preserve the family from the sockaddr, if any, in an m_tag for
1515 * use when injecting the mbuf into the routing socket buffer from
1516 * the netisr.
1517 */
1518 if (saf != AF_UNSPEC) {
1519 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
1520 M_NOWAIT);
1521 if (tag == NULL) {
1522 m_freem(m);
1523 return;
1524 }
1525 *(unsigned short *)(tag + 1) = saf;
1526 m_tag_prepend(m, tag);
1527 }
1528 #ifdef VIMAGE
1529 if (V_loif)
1530 m->m_pkthdr.rcvif = V_loif;
1531 else {
1532 m_freem(m);
1533 return;
1534 }
1535 #endif
1536 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */
1537 }
1538
1539 /*
1540 * This is used in dumping the kernel table via sysctl().
1541 */
1542 static int
1543 sysctl_dumpentry(struct radix_node *rn, void *vw)
1544 {
1545 struct walkarg *w = vw;
1546 struct rtentry *rt = (struct rtentry *)rn;
1547 int error = 0, size;
1548 struct rt_addrinfo info;
1549 struct sockaddr_storage ss;
1550
1551 IFNET_RLOCK_NOSLEEP_ASSERT();
1552
1553 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1554 return 0;
1555 if ((rt->rt_flags & RTF_HOST) == 0
1556 ? jailed_without_vnet(w->w_req->td->td_ucred)
1557 : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0)
1558 return (0);
1559 bzero((caddr_t)&info, sizeof(info));
1560 info.rti_info[RTAX_DST] = rt_key(rt);
1561 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1562 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt),
1563 rt_mask(rt), &ss);
1564 info.rti_info[RTAX_GENMASK] = 0;
1565 if (rt->rt_ifp && !(rt->rt_ifp->if_flags & IFF_DYING)) {
1566 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
1567 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
1568 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1569 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
1570 }
1571 if ((error = rtsock_msg_buffer(RTM_GET, &info, w, &size)) != 0)
1572 return (error);
1573 if (w->w_req && w->w_tmem) {
1574 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1575
1576 bzero(&rtm->rtm_index,
1577 sizeof(*rtm) - offsetof(struct rt_msghdr, rtm_index));
1578 if (rt->rt_flags & RTF_GWFLAG_COMPAT)
1579 rtm->rtm_flags = RTF_GATEWAY |
1580 (rt->rt_flags & ~RTF_GWFLAG_COMPAT);
1581 else
1582 rtm->rtm_flags = rt->rt_flags;
1583 rt_getmetrics(rt, &rtm->rtm_rmx);
1584 rtm->rtm_index = rt->rt_ifp->if_index;
1585 rtm->rtm_addrs = info.rti_addrs;
1586 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1587 return (error);
1588 }
1589 return (error);
1590 }
1591
1592 static int
1593 sysctl_iflist_ifml(struct ifnet *ifp, const struct if_data *src_ifd,
1594 struct rt_addrinfo *info, struct walkarg *w, int len)
1595 {
1596 struct if_msghdrl *ifm;
1597 struct if_data *ifd;
1598
1599 ifm = (struct if_msghdrl *)w->w_tmem;
1600
1601 #ifdef COMPAT_FREEBSD32
1602 if (w->w_req->flags & SCTL_MASK32) {
1603 struct if_msghdrl32 *ifm32;
1604
1605 ifm32 = (struct if_msghdrl32 *)ifm;
1606 ifm32->ifm_addrs = info->rti_addrs;
1607 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1608 ifm32->ifm_index = ifp->if_index;
1609 ifm32->_ifm_spare1 = 0;
1610 ifm32->ifm_len = sizeof(*ifm32);
1611 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data);
1612 ifm32->_ifm_spare2 = 0;
1613 ifd = &ifm32->ifm_data;
1614 } else
1615 #endif
1616 {
1617 ifm->ifm_addrs = info->rti_addrs;
1618 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1619 ifm->ifm_index = ifp->if_index;
1620 ifm->_ifm_spare1 = 0;
1621 ifm->ifm_len = sizeof(*ifm);
1622 ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data);
1623 ifm->_ifm_spare2 = 0;
1624 ifd = &ifm->ifm_data;
1625 }
1626
1627 memcpy(ifd, src_ifd, sizeof(*ifd));
1628
1629 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1630 }
1631
1632 static int
1633 sysctl_iflist_ifm(struct ifnet *ifp, const struct if_data *src_ifd,
1634 struct rt_addrinfo *info, struct walkarg *w, int len)
1635 {
1636 struct if_msghdr *ifm;
1637 struct if_data *ifd;
1638
1639 ifm = (struct if_msghdr *)w->w_tmem;
1640
1641 #ifdef COMPAT_FREEBSD32
1642 if (w->w_req->flags & SCTL_MASK32) {
1643 struct if_msghdr32 *ifm32;
1644
1645 ifm32 = (struct if_msghdr32 *)ifm;
1646 ifm32->ifm_addrs = info->rti_addrs;
1647 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1648 ifm32->ifm_index = ifp->if_index;
1649 ifm32->_ifm_spare1 = 0;
1650 ifd = &ifm32->ifm_data;
1651 } else
1652 #endif
1653 {
1654 ifm->ifm_addrs = info->rti_addrs;
1655 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1656 ifm->ifm_index = ifp->if_index;
1657 ifm->_ifm_spare1 = 0;
1658 ifd = &ifm->ifm_data;
1659 }
1660
1661 memcpy(ifd, src_ifd, sizeof(*ifd));
1662
1663 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1664 }
1665
1666 static int
1667 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info,
1668 struct walkarg *w, int len)
1669 {
1670 struct ifa_msghdrl *ifam;
1671 struct if_data *ifd;
1672
1673 ifam = (struct ifa_msghdrl *)w->w_tmem;
1674
1675 #ifdef COMPAT_FREEBSD32
1676 if (w->w_req->flags & SCTL_MASK32) {
1677 struct ifa_msghdrl32 *ifam32;
1678
1679 ifam32 = (struct ifa_msghdrl32 *)ifam;
1680 ifam32->ifam_addrs = info->rti_addrs;
1681 ifam32->ifam_flags = ifa->ifa_flags;
1682 ifam32->ifam_index = ifa->ifa_ifp->if_index;
1683 ifam32->_ifam_spare1 = 0;
1684 ifam32->ifam_len = sizeof(*ifam32);
1685 ifam32->ifam_data_off =
1686 offsetof(struct ifa_msghdrl32, ifam_data);
1687 ifam32->ifam_metric = ifa->ifa_ifp->if_metric;
1688 ifd = &ifam32->ifam_data;
1689 } else
1690 #endif
1691 {
1692 ifam->ifam_addrs = info->rti_addrs;
1693 ifam->ifam_flags = ifa->ifa_flags;
1694 ifam->ifam_index = ifa->ifa_ifp->if_index;
1695 ifam->_ifam_spare1 = 0;
1696 ifam->ifam_len = sizeof(*ifam);
1697 ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data);
1698 ifam->ifam_metric = ifa->ifa_ifp->if_metric;
1699 ifd = &ifam->ifam_data;
1700 }
1701
1702 bzero(ifd, sizeof(*ifd));
1703 ifd->ifi_datalen = sizeof(struct if_data);
1704 ifd->ifi_ipackets = counter_u64_fetch(ifa->ifa_ipackets);
1705 ifd->ifi_opackets = counter_u64_fetch(ifa->ifa_opackets);
1706 ifd->ifi_ibytes = counter_u64_fetch(ifa->ifa_ibytes);
1707 ifd->ifi_obytes = counter_u64_fetch(ifa->ifa_obytes);
1708
1709 /* Fixup if_data carp(4) vhid. */
1710 if (carp_get_vhid_p != NULL)
1711 ifd->ifi_vhid = (*carp_get_vhid_p)(ifa);
1712
1713 return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1714 }
1715
1716 static int
1717 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info,
1718 struct walkarg *w, int len)
1719 {
1720 struct ifa_msghdr *ifam;
1721
1722 ifam = (struct ifa_msghdr *)w->w_tmem;
1723 ifam->ifam_addrs = info->rti_addrs;
1724 ifam->ifam_flags = ifa->ifa_flags;
1725 ifam->ifam_index = ifa->ifa_ifp->if_index;
1726 ifam->_ifam_spare1 = 0;
1727 ifam->ifam_metric = ifa->ifa_ifp->if_metric;
1728
1729 return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1730 }
1731
1732 static int
1733 sysctl_iflist(int af, struct walkarg *w)
1734 {
1735 struct ifnet *ifp;
1736 struct ifaddr *ifa;
1737 struct if_data ifd;
1738 struct rt_addrinfo info;
1739 int len, error = 0;
1740 struct sockaddr_storage ss;
1741
1742 bzero((caddr_t)&info, sizeof(info));
1743 bzero(&ifd, sizeof(ifd));
1744 IFNET_RLOCK_NOSLEEP();
1745 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1746 if (w->w_arg && w->w_arg != ifp->if_index)
1747 continue;
1748 if_data_copy(ifp, &ifd);
1749 IF_ADDR_RLOCK(ifp);
1750 ifa = ifp->if_addr;
1751 info.rti_info[RTAX_IFP] = ifa->ifa_addr;
1752 error = rtsock_msg_buffer(RTM_IFINFO, &info, w, &len);
1753 if (error != 0)
1754 goto done;
1755 info.rti_info[RTAX_IFP] = NULL;
1756 if (w->w_req && w->w_tmem) {
1757 if (w->w_op == NET_RT_IFLISTL)
1758 error = sysctl_iflist_ifml(ifp, &ifd, &info, w,
1759 len);
1760 else
1761 error = sysctl_iflist_ifm(ifp, &ifd, &info, w,
1762 len);
1763 if (error)
1764 goto done;
1765 }
1766 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1767 if (af && af != ifa->ifa_addr->sa_family)
1768 continue;
1769 if (prison_if(w->w_req->td->td_ucred,
1770 ifa->ifa_addr) != 0)
1771 continue;
1772 info.rti_info[RTAX_IFA] = ifa->ifa_addr;
1773 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(
1774 ifa->ifa_addr, ifa->ifa_netmask, &ss);
1775 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1776 error = rtsock_msg_buffer(RTM_NEWADDR, &info, w, &len);
1777 if (error != 0)
1778 goto done;
1779 if (w->w_req && w->w_tmem) {
1780 if (w->w_op == NET_RT_IFLISTL)
1781 error = sysctl_iflist_ifaml(ifa, &info,
1782 w, len);
1783 else
1784 error = sysctl_iflist_ifam(ifa, &info,
1785 w, len);
1786 if (error)
1787 goto done;
1788 }
1789 }
1790 IF_ADDR_RUNLOCK(ifp);
1791 info.rti_info[RTAX_IFA] = NULL;
1792 info.rti_info[RTAX_NETMASK] = NULL;
1793 info.rti_info[RTAX_BRD] = NULL;
1794 }
1795 done:
1796 if (ifp != NULL)
1797 IF_ADDR_RUNLOCK(ifp);
1798 IFNET_RUNLOCK_NOSLEEP();
1799 return (error);
1800 }
1801
1802 static int
1803 sysctl_ifmalist(int af, struct walkarg *w)
1804 {
1805 struct rt_addrinfo info;
1806 struct ifaddr *ifa;
1807 struct ifmultiaddr *ifma;
1808 struct ifnet *ifp;
1809 int error, len;
1810
1811 error = 0;
1812 bzero((caddr_t)&info, sizeof(info));
1813
1814 IFNET_RLOCK_NOSLEEP();
1815 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1816 if (w->w_arg && w->w_arg != ifp->if_index)
1817 continue;
1818 ifa = ifp->if_addr;
1819 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
1820 IF_ADDR_RLOCK(ifp);
1821 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1822 if (af && af != ifma->ifma_addr->sa_family)
1823 continue;
1824 if (prison_if(w->w_req->td->td_ucred,
1825 ifma->ifma_addr) != 0)
1826 continue;
1827 info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1828 info.rti_info[RTAX_GATEWAY] =
1829 (ifma->ifma_addr->sa_family != AF_LINK) ?
1830 ifma->ifma_lladdr : NULL;
1831 error = rtsock_msg_buffer(RTM_NEWMADDR, &info, w, &len);
1832 if (error != 0)
1833 break;
1834 if (w->w_req && w->w_tmem) {
1835 struct ifma_msghdr *ifmam;
1836
1837 ifmam = (struct ifma_msghdr *)w->w_tmem;
1838 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1839 ifmam->ifmam_flags = 0;
1840 ifmam->ifmam_addrs = info.rti_addrs;
1841 ifmam->_ifmam_spare1 = 0;
1842 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1843 if (error != 0)
1844 break;
1845 }
1846 }
1847 IF_ADDR_RUNLOCK(ifp);
1848 if (error != 0)
1849 break;
1850 }
1851 IFNET_RUNLOCK_NOSLEEP();
1852 return (error);
1853 }
1854
1855 static int
1856 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1857 {
1858 int *name = (int *)arg1;
1859 u_int namelen = arg2;
1860 struct rib_head *rnh = NULL; /* silence compiler. */
1861 int i, lim, error = EINVAL;
1862 int fib = 0;
1863 u_char af;
1864 struct walkarg w;
1865
1866 name ++;
1867 namelen--;
1868 if (req->newptr)
1869 return (EPERM);
1870 if (name[1] == NET_RT_DUMP) {
1871 if (namelen == 3)
1872 fib = req->td->td_proc->p_fibnum;
1873 else if (namelen == 4)
1874 fib = (name[3] == RT_ALL_FIBS) ?
1875 req->td->td_proc->p_fibnum : name[3];
1876 else
1877 return ((namelen < 3) ? EISDIR : ENOTDIR);
1878 if (fib < 0 || fib >= rt_numfibs)
1879 return (EINVAL);
1880 } else if (namelen != 3)
1881 return ((namelen < 3) ? EISDIR : ENOTDIR);
1882 af = name[0];
1883 if (af > AF_MAX)
1884 return (EINVAL);
1885 bzero(&w, sizeof(w));
1886 w.w_op = name[1];
1887 w.w_arg = name[2];
1888 w.w_req = req;
1889
1890 error = sysctl_wire_old_buffer(req, 0);
1891 if (error)
1892 return (error);
1893
1894 /*
1895 * Allocate reply buffer in advance.
1896 * All rtsock messages has maximum length of u_short.
1897 */
1898 w.w_tmemsize = 65536;
1899 w.w_tmem = malloc(w.w_tmemsize, M_TEMP, M_WAITOK);
1900
1901 switch (w.w_op) {
1902
1903 case NET_RT_DUMP:
1904 case NET_RT_FLAGS:
1905 if (af == 0) { /* dump all tables */
1906 i = 1;
1907 lim = AF_MAX;
1908 } else /* dump only one table */
1909 i = lim = af;
1910
1911 /*
1912 * take care of llinfo entries, the caller must
1913 * specify an AF
1914 */
1915 if (w.w_op == NET_RT_FLAGS &&
1916 (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) {
1917 if (af != 0)
1918 error = lltable_sysctl_dumparp(af, w.w_req);
1919 else
1920 error = EINVAL;
1921 break;
1922 }
1923 /*
1924 * take care of routing entries
1925 */
1926 for (error = 0; error == 0 && i <= lim; i++) {
1927 rnh = rt_tables_get_rnh(fib, i);
1928 if (rnh != NULL) {
1929 RIB_RLOCK(rnh);
1930 IFNET_RLOCK_NOSLEEP();
1931 error = rnh->rnh_walktree(&rnh->head,
1932 sysctl_dumpentry, &w);
1933 IFNET_RUNLOCK_NOSLEEP();
1934 RIB_RUNLOCK(rnh);
1935 } else if (af != 0)
1936 error = EAFNOSUPPORT;
1937 }
1938 break;
1939
1940 case NET_RT_IFLIST:
1941 case NET_RT_IFLISTL:
1942 error = sysctl_iflist(af, &w);
1943 break;
1944
1945 case NET_RT_IFMALIST:
1946 error = sysctl_ifmalist(af, &w);
1947 break;
1948 }
1949
1950 free(w.w_tmem, M_TEMP);
1951 return (error);
1952 }
1953
1954 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1955
1956 /*
1957 * Definitions of protocols supported in the ROUTE domain.
1958 */
1959
1960 static struct domain routedomain; /* or at least forward */
1961
1962 static struct protosw routesw[] = {
1963 {
1964 .pr_type = SOCK_RAW,
1965 .pr_domain = &routedomain,
1966 .pr_flags = PR_ATOMIC|PR_ADDR,
1967 .pr_output = route_output,
1968 .pr_ctlinput = raw_ctlinput,
1969 .pr_init = raw_init,
1970 .pr_usrreqs = &route_usrreqs
1971 }
1972 };
1973
1974 static struct domain routedomain = {
1975 .dom_family = PF_ROUTE,
1976 .dom_name = "route",
1977 .dom_protosw = routesw,
1978 .dom_protoswNPROTOSW = &routesw[nitems(routesw)]
1979 };
1980
1981 VNET_DOMAIN_SET(route);
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