Add SCSI READ CAPACITY support to camcontrol.
[dragonfly.git] / sys / net / rtsock.c
CommitLineData
f3ed2586
JH
1/*
2 * Copyright (c) 2004, 2005 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Jeffrey M. Hsu.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of The DragonFly Project nor the names of its
16 * contributors may be used to endorse or promote products derived
17 * from this software without specific, prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
984263bc
MD
33/*
34 * Copyright (c) 1988, 1991, 1993
35 * The Regents of the University of California. All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Berkeley and its contributors.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
66 * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $
978400d3 67 * $DragonFly: src/sys/net/rtsock.c,v 1.42 2008/01/06 16:55:51 swildner Exp $
984263bc
MD
68 */
69
78812139
EN
70#include "opt_sctp.h"
71
984263bc
MD
72#include <sys/param.h>
73#include <sys/systm.h>
74#include <sys/kernel.h>
75#include <sys/sysctl.h>
76#include <sys/proc.h>
77#include <sys/malloc.h>
78#include <sys/mbuf.h>
47e78ae8 79#include <sys/protosw.h>
984263bc
MD
80#include <sys/socket.h>
81#include <sys/socketvar.h>
82#include <sys/domain.h>
a49aa710 83#include <sys/thread2.h>
deffea2e 84
984263bc
MD
85#include <net/if.h>
86#include <net/route.h>
87#include <net/raw_cb.h>
47db7f9b 88#include <net/netmsg2.h>
984263bc 89
78812139
EN
90#ifdef SCTP
91extern void sctp_add_ip_address(struct ifaddr *ifa);
92extern void sctp_delete_ip_address(struct ifaddr *ifa);
93#endif /* SCTP */
94
984263bc
MD
95MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
96
f23061d4
JH
97static struct route_cb {
98 int ip_count;
99 int ip6_count;
100 int ipx_count;
101 int ns_count;
102 int any_count;
103} route_cb;
104
590b8cd4 105static const struct sockaddr route_src = { 2, PF_ROUTE, };
984263bc
MD
106
107struct walkarg {
108 int w_tmemsize;
109 int w_op, w_arg;
8e63efec 110 void *w_tmem;
984263bc
MD
111 struct sysctl_req *w_req;
112};
113
114static struct mbuf *
590b8cd4
JH
115 rt_msg_mbuf (int, struct rt_addrinfo *);
116static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len);
117static int rt_msgsize (int type, struct rt_addrinfo *rtinfo);
ef87f48d 118static int rt_xaddrs (char *, char *, struct rt_addrinfo *);
158abb01
RG
119static int sysctl_dumpentry (struct radix_node *rn, void *vw);
120static int sysctl_iflist (int af, struct walkarg *w);
deffea2e 121static int route_output(struct mbuf *, struct socket *, ...);
47e78ae8 122static void rt_setmetrics (u_long, struct rt_metrics *,
f23061d4 123 struct rt_metrics *);
984263bc 124
984263bc
MD
125/*
126 * It really doesn't make any sense at all for this code to share much
127 * with raw_usrreq.c, since its functionality is so restricted. XXX
128 */
129static int
130rts_abort(struct socket *so)
131{
a49aa710 132 int error;
f23061d4 133
a49aa710 134 crit_enter();
984263bc 135 error = raw_usrreqs.pru_abort(so);
a49aa710 136 crit_exit();
984263bc
MD
137 return error;
138}
139
140/* pru_accept is EOPNOTSUPP */
141
142static int
e4700d00 143rts_attach(struct socket *so, int proto, struct pru_attach_info *ai)
984263bc
MD
144{
145 struct rawcb *rp;
a49aa710 146 int error;
984263bc 147
ef87f48d 148 if (sotorawcb(so) != NULL)
984263bc 149 return EISCONN; /* XXX panic? */
f23061d4 150
efda3bd0 151 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
984263bc
MD
152
153 /*
a49aa710 154 * The critical section is necessary to block protocols from sending
984263bc
MD
155 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
156 * this PCB is extant but incompletely initialized.
157 * Probably we should try to do more of this work beforehand and
a49aa710 158 * eliminate the critical section.
984263bc 159 */
a49aa710 160 crit_enter();
ef87f48d 161 so->so_pcb = rp;
e4700d00 162 error = raw_attach(so, proto, ai->sb_rlimit);
984263bc
MD
163 rp = sotorawcb(so);
164 if (error) {
a49aa710 165 crit_exit();
efda3bd0 166 kfree(rp, M_PCB);
984263bc
MD
167 return error;
168 }
169 switch(rp->rcb_proto.sp_protocol) {
170 case AF_INET:
171 route_cb.ip_count++;
172 break;
173 case AF_INET6:
174 route_cb.ip6_count++;
175 break;
176 case AF_IPX:
177 route_cb.ipx_count++;
178 break;
179 case AF_NS:
180 route_cb.ns_count++;
181 break;
182 }
183 rp->rcb_faddr = &route_src;
184 route_cb.any_count++;
185 soisconnected(so);
186 so->so_options |= SO_USELOOPBACK;
a49aa710 187 crit_exit();
984263bc
MD
188 return 0;
189}
190
191static int
dadab5e9 192rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc 193{
a49aa710 194 int error;
f23061d4 195
a49aa710 196 crit_enter();
dadab5e9 197 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
a49aa710 198 crit_exit();
984263bc
MD
199 return error;
200}
201
202static int
dadab5e9 203rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
984263bc 204{
a49aa710 205 int error;
f23061d4 206
a49aa710 207 crit_enter();
dadab5e9 208 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
a49aa710 209 crit_exit();
984263bc
MD
210 return error;
211}
212
213/* pru_connect2 is EOPNOTSUPP */
214/* pru_control is EOPNOTSUPP */
215
216static int
217rts_detach(struct socket *so)
218{
219 struct rawcb *rp = sotorawcb(so);
a49aa710 220 int error;
984263bc 221
a49aa710 222 crit_enter();
ef87f48d 223 if (rp != NULL) {
984263bc
MD
224 switch(rp->rcb_proto.sp_protocol) {
225 case AF_INET:
226 route_cb.ip_count--;
227 break;
228 case AF_INET6:
229 route_cb.ip6_count--;
230 break;
231 case AF_IPX:
232 route_cb.ipx_count--;
233 break;
234 case AF_NS:
235 route_cb.ns_count--;
236 break;
237 }
238 route_cb.any_count--;
239 }
240 error = raw_usrreqs.pru_detach(so);
a49aa710 241 crit_exit();
984263bc
MD
242 return error;
243}
244
245static int
246rts_disconnect(struct socket *so)
247{
a49aa710 248 int error;
f23061d4 249
a49aa710 250 crit_enter();
984263bc 251 error = raw_usrreqs.pru_disconnect(so);
a49aa710 252 crit_exit();
984263bc
MD
253 return error;
254}
255
256/* pru_listen is EOPNOTSUPP */
257
258static int
259rts_peeraddr(struct socket *so, struct sockaddr **nam)
260{
a49aa710 261 int error;
f23061d4 262
a49aa710 263 crit_enter();
984263bc 264 error = raw_usrreqs.pru_peeraddr(so, nam);
a49aa710 265 crit_exit();
984263bc
MD
266 return error;
267}
268
269/* pru_rcvd is EOPNOTSUPP */
270/* pru_rcvoob is EOPNOTSUPP */
271
272static int
273rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
dadab5e9 274 struct mbuf *control, struct thread *td)
984263bc 275{
a49aa710 276 int error;
f23061d4 277
a49aa710 278 crit_enter();
dadab5e9 279 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
a49aa710 280 crit_exit();
984263bc
MD
281 return error;
282}
283
284/* pru_sense is null */
285
286static int
287rts_shutdown(struct socket *so)
288{
a49aa710 289 int error;
f23061d4 290
a49aa710 291 crit_enter();
984263bc 292 error = raw_usrreqs.pru_shutdown(so);
a49aa710 293 crit_exit();
984263bc
MD
294 return error;
295}
296
297static int
298rts_sockaddr(struct socket *so, struct sockaddr **nam)
299{
a49aa710 300 int error;
f23061d4 301
a49aa710 302 crit_enter();
984263bc 303 error = raw_usrreqs.pru_sockaddr(so, nam);
a49aa710 304 crit_exit();
984263bc
MD
305 return error;
306}
307
308static struct pr_usrreqs route_usrreqs = {
fa5e758c
MD
309 .pru_abort = rts_abort,
310 .pru_accept = pru_accept_notsupp,
311 .pru_attach = rts_attach,
312 .pru_bind = rts_bind,
313 .pru_connect = rts_connect,
314 .pru_connect2 = pru_connect2_notsupp,
315 .pru_control = pru_control_notsupp,
316 .pru_detach = rts_detach,
317 .pru_disconnect = rts_disconnect,
318 .pru_listen = pru_listen_notsupp,
319 .pru_peeraddr = rts_peeraddr,
320 .pru_rcvd = pru_rcvd_notsupp,
321 .pru_rcvoob = pru_rcvoob_notsupp,
322 .pru_send = rts_send,
323 .pru_sense = pru_sense_null,
324 .pru_shutdown = rts_shutdown,
325 .pru_sockaddr = rts_sockaddr,
326 .pru_sosend = sosend,
327 .pru_soreceive = soreceive,
328 .pru_sopoll = sopoll
984263bc
MD
329};
330
590b8cd4
JH
331static __inline sa_family_t
332familyof(struct sockaddr *sa)
333{
334 return (sa != NULL ? sa->sa_family : 0);
335}
336
47db7f9b
MD
337/*
338 * Routing socket input function. The packet must be serialized onto cpu 0.
339 * We use the cpu0_soport() netisr processing loop to handle it.
340 *
341 * This looks messy but it means that anyone, including interrupt code,
342 * can send a message to the routing socket.
343 */
590b8cd4 344static void
47db7f9b 345rts_input_handler(struct netmsg *msg)
590b8cd4
JH
346{
347 static const struct sockaddr route_dst = { 2, PF_ROUTE, };
47db7f9b
MD
348 struct sockproto route_proto;
349 struct netmsg_packet *pmsg;
350 struct mbuf *m;
351 sa_family_t family;
352
353 pmsg = (void *)msg;
354 m = pmsg->nm_packet;
355 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result;
356 route_proto.sp_family = PF_ROUTE;
357 route_proto.sp_protocol = family;
590b8cd4
JH
358
359 raw_input(m, &route_proto, &route_src, &route_dst);
360}
361
47db7f9b
MD
362static void
363rts_input(struct mbuf *m, sa_family_t family)
364{
365 struct netmsg_packet *pmsg;
366 lwkt_port_t port;
367
934c6849 368 port = cpu0_soport(NULL, NULL, NULL, 0);
47db7f9b
MD
369 pmsg = &m->m_hdr.mh_netmsg;
370 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport,
371 0, rts_input_handler);
372 pmsg->nm_packet = m;
373 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family;
374 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg);
375}
376
590b8cd4
JH
377static void *
378reallocbuf(void *ptr, size_t len, size_t olen)
379{
380 void *newptr;
381
efda3bd0 382 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
590b8cd4
JH
383 if (newptr == NULL)
384 return NULL;
385 bcopy(ptr, newptr, olen);
efda3bd0 386 kfree(ptr, M_RTABLE);
590b8cd4
JH
387 return (newptr);
388}
389
8e63efec
JH
390/*
391 * Internal helper routine for route_output().
392 */
590b8cd4
JH
393static int
394fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt,
395 struct rt_addrinfo *rtinfo)
396{
397 int msglen;
398 struct rt_msghdr *rtm = *prtm;
399
400 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */
401 rtinfo->rti_dst = rt_key(rt);
402 rtinfo->rti_gateway = rt->rt_gateway;
403 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */
404 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */
405 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
406 if (rt->rt_ifp != NULL) {
407 rtinfo->rti_ifpaddr =
408 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
409 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr;
410 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
411 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
412 rtm->rtm_index = rt->rt_ifp->if_index;
413 } else {
414 rtinfo->rti_ifpaddr = NULL;
415 rtinfo->rti_ifaaddr = NULL;
416 }
417 }
418
419 msglen = rt_msgsize(rtm->rtm_type, rtinfo);
420 if (rtm->rtm_msglen < msglen) {
421 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen);
422 if (rtm == NULL)
423 return (ENOBUFS);
424 *prtm = rtm;
425 }
426 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen);
427
428 rtm->rtm_flags = rt->rt_flags;
429 rtm->rtm_rmx = rt->rt_rmx;
430 rtm->rtm_addrs = rtinfo->rti_addrs;
431
432 return (0);
433}
434
ecdefdda
MD
435static void route_output_add_callback(int, int, struct rt_addrinfo *,
436 struct rtentry *, void *);
437static void route_output_delete_callback(int, int, struct rt_addrinfo *,
438 struct rtentry *, void *);
439static void route_output_change_callback(int, int, struct rt_addrinfo *,
440 struct rtentry *, void *);
441static void route_output_lock_callback(int, int, struct rt_addrinfo *,
442 struct rtentry *, void *);
443
984263bc
MD
444/*ARGSUSED*/
445static int
deffea2e 446route_output(struct mbuf *m, struct socket *so, ...)
984263bc 447{
2e9572df 448 struct rt_msghdr *rtm = NULL;
ecdefdda 449 struct rtentry *rt;
984263bc 450 struct radix_node_head *rnh;
f23061d4 451 struct rawcb *rp = NULL;
deffea2e 452 struct pr_output_info *oi;
590b8cd4 453 struct rt_addrinfo rtinfo;
ef87f48d 454 int len, error = 0;
deffea2e
JS
455 __va_list ap;
456
457 __va_start(ap, so);
458 oi = __va_arg(ap, struct pr_output_info *);
459 __va_end(ap);
984263bc 460
ef87f48d 461#define gotoerr(e) { error = e; goto flush;}
590b8cd4
JH
462
463 if (m == NULL ||
464 (m->m_len < sizeof(long) &&
465 (m = m_pullup(m, sizeof(long))) == NULL))
984263bc 466 return (ENOBUFS);
ef87f48d 467 if (!(m->m_flags & M_PKTHDR))
984263bc
MD
468 panic("route_output");
469 len = m->m_pkthdr.len;
590b8cd4 470 if (len < sizeof(struct rt_msghdr) ||
984263bc 471 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
590b8cd4 472 rtinfo.rti_dst = NULL;
ef87f48d 473 gotoerr(EINVAL);
984263bc 474 }
efda3bd0 475 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
ef87f48d 476 if (rtm == NULL) {
590b8cd4 477 rtinfo.rti_dst = NULL;
ef87f48d 478 gotoerr(ENOBUFS);
984263bc
MD
479 }
480 m_copydata(m, 0, len, (caddr_t)rtm);
481 if (rtm->rtm_version != RTM_VERSION) {
590b8cd4 482 rtinfo.rti_dst = NULL;
ef87f48d 483 gotoerr(EPROTONOSUPPORT);
984263bc 484 }
47e78ae8 485 rtm->rtm_pid = oi->p_pid;
590b8cd4
JH
486 bzero(&rtinfo, sizeof(struct rt_addrinfo));
487 rtinfo.rti_addrs = rtm->rtm_addrs;
488 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) {
489 rtinfo.rti_dst = NULL;
ef87f48d 490 gotoerr(EINVAL);
984263bc 491 }
590b8cd4
JH
492 rtinfo.rti_flags = rtm->rtm_flags;
493 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX ||
494 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX))
ef87f48d
JH
495 gotoerr(EINVAL);
496
590b8cd4
JH
497 if (rtinfo.rti_genmask != NULL) {
498 struct radix_node *n;
ef87f48d 499
590b8cd4
JH
500#define clen(s) (*(u_char *)(s))
501 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1);
502 if (n != NULL &&
503 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) &&
504 bcmp((char *)rtinfo.rti_genmask + 1,
505 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0)
506 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key;
984263bc 507 else
ef87f48d 508 gotoerr(ENOBUFS);
984263bc
MD
509 }
510
511 /*
512 * Verify that the caller has the appropriate privilege; RTM_GET
513 * is the only operation the non-superuser is allowed.
514 */
dadab5e9 515 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0)
ef87f48d 516 gotoerr(EPERM);
984263bc
MD
517
518 switch (rtm->rtm_type) {
984263bc 519 case RTM_ADD:
ecdefdda
MD
520 if (rtinfo.rti_gateway == NULL) {
521 error = EINVAL;
522 } else {
523 error = rtrequest1_global(RTM_ADD, &rtinfo,
524 route_output_add_callback, rtm);
984263bc
MD
525 }
526 break;
984263bc 527 case RTM_DELETE:
ecdefdda
MD
528 /*
529 * note: &rtm passed as argument so 'rtm' can be replaced.
530 */
531 error = rtrequest1_global(RTM_DELETE, &rtinfo,
532 route_output_delete_callback, &rtm);
984263bc 533 break;
984263bc 534 case RTM_GET:
ecdefdda
MD
535 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family];
536 if (rnh == NULL) {
537 error = EAFNOSUPPORT;
538 break;
539 }
590b8cd4
JH
540 rt = (struct rtentry *)
541 rnh->rnh_lookup((char *)rtinfo.rti_dst,
542 (char *)rtinfo.rti_netmask, rnh);
ecdefdda
MD
543 if (rt == NULL) {
544 error = ESRCH;
984263bc
MD
545 break;
546 }
ecdefdda
MD
547 rt->rt_refcnt++;
548 if (fillrtmsg(&rtm, rt, &rtinfo) != 0)
549 gotoerr(ENOBUFS);
550 --rt->rt_refcnt;
551 break;
552 case RTM_CHANGE:
553 error = rtrequest1_global(RTM_GET, &rtinfo,
554 route_output_change_callback, rtm);
555 break;
556 case RTM_LOCK:
557 error = rtrequest1_global(RTM_GET, &rtinfo,
558 route_output_lock_callback, rtm);
590b8cd4 559 break;
984263bc 560 default:
ecdefdda
MD
561 error = EOPNOTSUPP;
562 break;
984263bc
MD
563 }
564
565flush:
590b8cd4
JH
566 if (rtm != NULL) {
567 if (error != 0)
984263bc
MD
568 rtm->rtm_errno = error;
569 else
570 rtm->rtm_flags |= RTF_DONE;
571 }
ecdefdda 572
984263bc
MD
573 /*
574 * Check to see if we don't want our own messages.
575 */
ef87f48d 576 if (!(so->so_options & SO_USELOOPBACK)) {
984263bc 577 if (route_cb.any_count <= 1) {
590b8cd4 578 if (rtm != NULL)
efda3bd0 579 kfree(rtm, M_RTABLE);
984263bc
MD
580 m_freem(m);
581 return (error);
582 }
583 /* There is another listener, so construct message */
584 rp = sotorawcb(so);
585 }
590b8cd4 586 if (rtm != NULL) {
984263bc
MD
587 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
588 if (m->m_pkthdr.len < rtm->rtm_msglen) {
589 m_freem(m);
590 m = NULL;
591 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
592 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
efda3bd0 593 kfree(rtm, M_RTABLE);
984263bc 594 }
ef87f48d 595 if (rp != NULL)
984263bc 596 rp->rcb_proto.sp_family = 0; /* Avoid us */
ef87f48d 597 if (m != NULL)
590b8cd4 598 rts_input(m, familyof(rtinfo.rti_dst));
ef87f48d 599 if (rp != NULL)
984263bc 600 rp->rcb_proto.sp_family = PF_ROUTE;
984263bc
MD
601 return (error);
602}
603
ecdefdda
MD
604static void
605route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
606 struct rtentry *rt, void *arg)
607{
608 struct rt_msghdr *rtm = arg;
609
610 if (error == 0 && rt != NULL) {
611 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
612 &rt->rt_rmx);
613 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
614 rt->rt_rmx.rmx_locks |=
615 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
616 rt->rt_genmask = rtinfo->rti_genmask;
617 }
618}
619
620static void
621route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
622 struct rtentry *rt, void *arg)
623{
624 struct rt_msghdr **rtm = arg;
625
626 if (error == 0 && rt) {
627 ++rt->rt_refcnt;
628 if (fillrtmsg(rtm, rt, rtinfo) != 0) {
629 error = ENOBUFS;
630 /* XXX no way to return the error */
631 }
632 --rt->rt_refcnt;
633 }
634}
635
636static void
637route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
638 struct rtentry *rt, void *arg)
639{
640 struct rt_msghdr *rtm = arg;
641 struct ifaddr *ifa;
642
643 if (error)
644 goto done;
645
646 /*
647 * new gateway could require new ifaddr, ifp;
648 * flags may also be different; ifp may be specified
649 * by ll sockaddr when protocol address is ambiguous
650 */
651 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) ||
652 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL &&
653 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))
654 ) {
655 error = rt_getifa(rtinfo);
656 if (error != 0)
657 goto done;
658 }
659 if (rtinfo->rti_gateway != NULL) {
660 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway);
661 if (error != 0)
662 goto done;
663 }
664 if ((ifa = rtinfo->rti_ifa) != NULL) {
665 struct ifaddr *oifa = rt->rt_ifa;
666
667 if (oifa != ifa) {
668 if (oifa && oifa->ifa_rtrequest)
669 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo);
670 IFAFREE(rt->rt_ifa);
671 IFAREF(ifa);
672 rt->rt_ifa = ifa;
673 rt->rt_ifp = rtinfo->rti_ifp;
674 }
675 }
676 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx);
677 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
678 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo);
679 if (rtinfo->rti_genmask != NULL)
680 rt->rt_genmask = rtinfo->rti_genmask;
681done:
682 /* XXX no way to return error */
683 ;
684}
685
686static void
687route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
688 struct rtentry *rt, void *arg)
689{
690 struct rt_msghdr *rtm = arg;
691
692 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
693 rt->rt_rmx.rmx_locks |=
694 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
695}
696
984263bc 697static void
ef87f48d 698rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out)
984263bc 699{
2e9572df
JH
700#define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt;
701 setmetric(RTV_RPIPE, rmx_recvpipe);
702 setmetric(RTV_SPIPE, rmx_sendpipe);
703 setmetric(RTV_SSTHRESH, rmx_ssthresh);
704 setmetric(RTV_RTT, rmx_rtt);
705 setmetric(RTV_RTTVAR, rmx_rttvar);
706 setmetric(RTV_HOPCOUNT, rmx_hopcount);
707 setmetric(RTV_MTU, rmx_mtu);
708 setmetric(RTV_EXPIRE, rmx_expire);
709#undef setmetric
984263bc
MD
710}
711
712#define ROUNDUP(a) \
713 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
984263bc 714
984263bc
MD
715/*
716 * Extract the addresses of the passed sockaddrs.
717 * Do a little sanity checking so as to avoid bad memory references.
718 * This data is derived straight from userland.
719 */
720static int
ef87f48d 721rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo)
984263bc 722{
82ed7fc2
RG
723 struct sockaddr *sa;
724 int i;
984263bc
MD
725
726 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
727 if ((rtinfo->rti_addrs & (1 << i)) == 0)
728 continue;
729 sa = (struct sockaddr *)cp;
730 /*
731 * It won't fit.
732 */
0c3c561c 733 if ((cp + sa->sa_len) > cplim) {
984263bc
MD
734 return (EINVAL);
735 }
736
737 /*
ef87f48d 738 * There are no more... Quit now.
984263bc 739 * If there are more bits, they are in error.
ef87f48d 740 * I've seen this. route(1) can evidently generate these.
984263bc 741 * This causes kernel to core dump.
ef87f48d 742 * For compatibility, if we see this, point to a safe address.
984263bc
MD
743 */
744 if (sa->sa_len == 0) {
590b8cd4
JH
745 static struct sockaddr sa_zero = {
746 sizeof sa_zero, AF_INET,
747 };
748
984263bc
MD
749 rtinfo->rti_info[i] = &sa_zero;
750 return (0); /* should be EINVAL but for compat */
751 }
752
ef87f48d 753 /* Accept the sockaddr. */
984263bc 754 rtinfo->rti_info[i] = sa;
590b8cd4 755 cp += ROUNDUP(sa->sa_len);
984263bc
MD
756 }
757 return (0);
758}
759
590b8cd4
JH
760static int
761rt_msghdrsize(int type)
984263bc 762{
984263bc 763 switch (type) {
984263bc
MD
764 case RTM_DELADDR:
765 case RTM_NEWADDR:
590b8cd4 766 return sizeof(struct ifa_msghdr);
984263bc
MD
767 case RTM_DELMADDR:
768 case RTM_NEWMADDR:
590b8cd4 769 return sizeof(struct ifma_msghdr);
984263bc 770 case RTM_IFINFO:
590b8cd4 771 return sizeof(struct if_msghdr);
984263bc 772 case RTM_IFANNOUNCE:
841ab66c 773 case RTM_IEEE80211:
590b8cd4 774 return sizeof(struct if_announcemsghdr);
984263bc 775 default:
590b8cd4 776 return sizeof(struct rt_msghdr);
984263bc 777 }
590b8cd4
JH
778}
779
780static int
781rt_msgsize(int type, struct rt_addrinfo *rtinfo)
782{
783 int len, i;
784
785 len = rt_msghdrsize(type);
786 for (i = 0; i < RTAX_MAX; i++) {
787 if (rtinfo->rti_info[i] != NULL)
788 len += ROUNDUP(rtinfo->rti_info[i]->sa_len);
984263bc 789 }
590b8cd4
JH
790 len = ALIGN(len);
791 return len;
792}
793
794/*
795 * Build a routing message in a buffer.
796 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
797 * to the end of the buffer after the message header.
798 *
799 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
800 * This side-effect can be avoided if we reorder the addrs bitmask field in all
801 * the route messages to line up so we can set it here instead of back in the
802 * calling routine.
803 */
804static void
805rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen)
806{
807 struct rt_msghdr *rtm;
808 char *cp;
809 int dlen, i;
810
811 rtm = (struct rt_msghdr *) buf;
812 rtm->rtm_version = RTM_VERSION;
813 rtm->rtm_type = type;
814 rtm->rtm_msglen = msglen;
815
816 cp = (char *)buf + rt_msghdrsize(type);
817 rtinfo->rti_addrs = 0;
984263bc 818 for (i = 0; i < RTAX_MAX; i++) {
590b8cd4
JH
819 struct sockaddr *sa;
820
984263bc
MD
821 if ((sa = rtinfo->rti_info[i]) == NULL)
822 continue;
823 rtinfo->rti_addrs |= (1 << i);
824 dlen = ROUNDUP(sa->sa_len);
590b8cd4
JH
825 bcopy(sa, cp, dlen);
826 cp += dlen;
984263bc 827 }
984263bc
MD
828}
829
590b8cd4
JH
830/*
831 * Build a routing message in a mbuf chain.
832 * Copy the addresses in the rtinfo->rti_info[] sockaddr array
833 * to the end of the mbuf after the message header.
834 *
835 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[].
836 * This side-effect can be avoided if we reorder the addrs bitmask field in all
837 * the route messages to line up so we can set it here instead of back in the
838 * calling routine.
839 */
840static struct mbuf *
841rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo)
984263bc 842{
590b8cd4
JH
843 struct mbuf *m;
844 struct rt_msghdr *rtm;
845 int hlen, len;
82ed7fc2 846 int i;
984263bc 847
590b8cd4
JH
848 hlen = rt_msghdrsize(type);
849 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen));
984263bc 850
50503f0f 851 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL);
590b8cd4
JH
852 if (m == NULL)
853 return (NULL);
e9fa4b60 854 mbuftrackid(m, 32);
590b8cd4
JH
855 m->m_pkthdr.len = m->m_len = hlen;
856 m->m_pkthdr.rcvif = NULL;
857 rtinfo->rti_addrs = 0;
858 len = hlen;
984263bc 859 for (i = 0; i < RTAX_MAX; i++) {
82ed7fc2 860 struct sockaddr *sa;
590b8cd4 861 int dlen;
984263bc 862
ef87f48d 863 if ((sa = rtinfo->rti_info[i]) == NULL)
984263bc
MD
864 continue;
865 rtinfo->rti_addrs |= (1 << i);
866 dlen = ROUNDUP(sa->sa_len);
590b8cd4 867 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */
984263bc
MD
868 len += dlen;
869 }
590b8cd4
JH
870 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */
871 m_freem(m);
872 return (NULL);
984263bc 873 }
590b8cd4
JH
874 rtm = mtod(m, struct rt_msghdr *);
875 bzero(rtm, hlen);
876 rtm->rtm_msglen = len;
877 rtm->rtm_version = RTM_VERSION;
878 rtm->rtm_type = type;
879 return (m);
984263bc
MD
880}
881
882/*
883 * This routine is called to generate a message from the routing
f23061d4 884 * socket indicating that a redirect has occurred, a routing lookup
984263bc
MD
885 * has failed, or that a protocol has detected timeouts to a particular
886 * destination.
887 */
888void
f23061d4 889rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
984263bc 890{
0c3c561c 891 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST];
82ed7fc2
RG
892 struct rt_msghdr *rtm;
893 struct mbuf *m;
984263bc
MD
894
895 if (route_cb.any_count == 0)
896 return;
590b8cd4 897 m = rt_msg_mbuf(type, rtinfo);
ef87f48d 898 if (m == NULL)
984263bc
MD
899 return;
900 rtm = mtod(m, struct rt_msghdr *);
901 rtm->rtm_flags = RTF_DONE | flags;
902 rtm->rtm_errno = error;
903 rtm->rtm_addrs = rtinfo->rti_addrs;
590b8cd4 904 rts_input(m, familyof(dst));
984263bc
MD
905}
906
f3ed2586
JH
907void
908rt_dstmsg(int type, struct sockaddr *dst, int error)
909{
910 struct rt_msghdr *rtm;
911 struct rt_addrinfo addrs;
912 struct mbuf *m;
913
914 if (route_cb.any_count == 0)
915 return;
916 bzero(&addrs, sizeof(struct rt_addrinfo));
917 addrs.rti_info[RTAX_DST] = dst;
590b8cd4 918 m = rt_msg_mbuf(type, &addrs);
f3ed2586
JH
919 if (m == NULL)
920 return;
921 rtm = mtod(m, struct rt_msghdr *);
922 rtm->rtm_flags = RTF_DONE;
923 rtm->rtm_errno = error;
924 rtm->rtm_addrs = addrs.rti_addrs;
590b8cd4 925 rts_input(m, familyof(dst));
f3ed2586
JH
926}
927
984263bc
MD
928/*
929 * This routine is called to generate a message from the routing
930 * socket indicating that the status of a network interface has changed.
931 */
932void
0c3c561c 933rt_ifmsg(struct ifnet *ifp)
984263bc 934{
82ed7fc2 935 struct if_msghdr *ifm;
984263bc 936 struct mbuf *m;
590b8cd4 937 struct rt_addrinfo rtinfo;
984263bc
MD
938
939 if (route_cb.any_count == 0)
940 return;
590b8cd4
JH
941 bzero(&rtinfo, sizeof(struct rt_addrinfo));
942 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo);
ef87f48d 943 if (m == NULL)
984263bc
MD
944 return;
945 ifm = mtod(m, struct if_msghdr *);
946 ifm->ifm_index = ifp->if_index;
9c095379 947 ifm->ifm_flags = ifp->if_flags;
984263bc 948 ifm->ifm_data = ifp->if_data;
590b8cd4
JH
949 ifm->ifm_addrs = 0;
950 rts_input(m, 0);
984263bc
MD
951}
952
372316d9
JH
953static void
954rt_ifamsg(int cmd, struct ifaddr *ifa)
955{
956 struct ifa_msghdr *ifam;
590b8cd4 957 struct rt_addrinfo rtinfo;
372316d9 958 struct mbuf *m;
372316d9
JH
959 struct ifnet *ifp = ifa->ifa_ifp;
960
590b8cd4
JH
961 bzero(&rtinfo, sizeof(struct rt_addrinfo));
962 rtinfo.rti_ifaaddr = ifa->ifa_addr;
963 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
964 rtinfo.rti_netmask = ifa->ifa_netmask;
965 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
f23061d4 966
590b8cd4 967 m = rt_msg_mbuf(cmd, &rtinfo);
f23061d4 968 if (m == NULL)
372316d9 969 return;
f23061d4 970
372316d9
JH
971 ifam = mtod(m, struct ifa_msghdr *);
972 ifam->ifam_index = ifp->if_index;
973 ifam->ifam_metric = ifa->ifa_metric;
974 ifam->ifam_flags = ifa->ifa_flags;
590b8cd4 975 ifam->ifam_addrs = rtinfo.rti_addrs;
f23061d4 976
590b8cd4 977 rts_input(m, familyof(ifa->ifa_addr));
372316d9
JH
978}
979
f3ed2586
JH
980void
981rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error)
372316d9
JH
982{
983 struct rt_msghdr *rtm;
590b8cd4 984 struct rt_addrinfo rtinfo;
372316d9 985 struct mbuf *m;
f3ed2586 986 struct sockaddr *dst;
372316d9
JH
987
988 if (rt == NULL)
989 return;
f23061d4 990
590b8cd4
JH
991 bzero(&rtinfo, sizeof(struct rt_addrinfo));
992 rtinfo.rti_dst = dst = rt_key(rt);
993 rtinfo.rti_gateway = rt->rt_gateway;
994 rtinfo.rti_netmask = rt_mask(rt);
f3ed2586 995 if (ifp != NULL)
590b8cd4
JH
996 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
997 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
f23061d4 998
590b8cd4 999 m = rt_msg_mbuf(cmd, &rtinfo);
f23061d4 1000 if (m == NULL)
372316d9 1001 return;
f23061d4 1002
372316d9 1003 rtm = mtod(m, struct rt_msghdr *);
f3ed2586
JH
1004 if (ifp != NULL)
1005 rtm->rtm_index = ifp->if_index;
372316d9
JH
1006 rtm->rtm_flags |= rt->rt_flags;
1007 rtm->rtm_errno = error;
590b8cd4 1008 rtm->rtm_addrs = rtinfo.rti_addrs;
f23061d4 1009
590b8cd4 1010 rts_input(m, familyof(dst));
372316d9
JH
1011}
1012
984263bc
MD
1013/*
1014 * This is called to generate messages from the routing socket
1015 * indicating a network interface has had addresses associated with it.
1016 * if we ever reverse the logic and replace messages TO the routing
1017 * socket indicate a request to configure interfaces, then it will
1018 * be unnecessary as the routing socket will automatically generate
1019 * copies of it.
1020 */
1021void
0c3c561c 1022rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
984263bc 1023{
78812139
EN
1024#ifdef SCTP
1025 /*
1026 * notify the SCTP stack
1027 * this will only get called when an address is added/deleted
1028 * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1029 */
1030 if (cmd == RTM_ADD)
1031 sctp_add_ip_address(ifa);
1032 else if (cmd == RTM_DELETE)
1033 sctp_delete_ip_address(ifa);
1034#endif /* SCTP */
1035
984263bc
MD
1036 if (route_cb.any_count == 0)
1037 return;
984263bc 1038
372316d9
JH
1039 if (cmd == RTM_ADD) {
1040 rt_ifamsg(RTM_NEWADDR, ifa);
f3ed2586 1041 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error);
372316d9
JH
1042 } else {
1043 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd));
f3ed2586 1044 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error);
372316d9 1045 rt_ifamsg(RTM_DELADDR, ifa);
984263bc
MD
1046 }
1047}
1048
1049/*
1050 * This is the analogue to the rt_newaddrmsg which performs the same
1051 * function but for multicast group memberhips. This is easier since
1052 * there is no route state to worry about.
1053 */
1054void
0c3c561c 1055rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
984263bc 1056{
590b8cd4 1057 struct rt_addrinfo rtinfo;
ef87f48d 1058 struct mbuf *m = NULL;
984263bc
MD
1059 struct ifnet *ifp = ifma->ifma_ifp;
1060 struct ifma_msghdr *ifmam;
1061
1062 if (route_cb.any_count == 0)
1063 return;
1064
590b8cd4
JH
1065 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1066 rtinfo.rti_ifaaddr = ifma->ifma_addr;
1782116d 1067 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrhead))
590b8cd4 1068 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr;
984263bc
MD
1069 /*
1070 * If a link-layer address is present, present it as a ``gateway''
1071 * (similarly to how ARP entries, e.g., are presented).
1072 */
590b8cd4 1073 rtinfo.rti_gateway = ifma->ifma_lladdr;
f23061d4 1074
590b8cd4 1075 m = rt_msg_mbuf(cmd, &rtinfo);
f23061d4 1076 if (m == NULL)
984263bc 1077 return;
f23061d4 1078
984263bc
MD
1079 ifmam = mtod(m, struct ifma_msghdr *);
1080 ifmam->ifmam_index = ifp->if_index;
590b8cd4 1081 ifmam->ifmam_addrs = rtinfo.rti_addrs;
f23061d4 1082
590b8cd4 1083 rts_input(m, familyof(ifma->ifma_addr));
984263bc
MD
1084}
1085
841ab66c
SZ
1086static struct mbuf *
1087rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1088 struct rt_addrinfo *info)
984263bc 1089{
590b8cd4 1090 struct if_announcemsghdr *ifan;
841ab66c 1091 struct mbuf *m;
984263bc
MD
1092
1093 if (route_cb.any_count == 0)
841ab66c 1094 return NULL;
f23061d4 1095
841ab66c
SZ
1096 bzero(info, sizeof(*info));
1097 m = rt_msg_mbuf(type, info);
984263bc 1098 if (m == NULL)
841ab66c 1099 return NULL;
f23061d4 1100
984263bc
MD
1101 ifan = mtod(m, struct if_announcemsghdr *);
1102 ifan->ifan_index = ifp->if_index;
5fe66e68 1103 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name);
984263bc 1104 ifan->ifan_what = what;
841ab66c
SZ
1105 return m;
1106}
1107
1108/*
1109 * This is called to generate routing socket messages indicating
1110 * IEEE80211 wireless events.
1111 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1112 */
1113void
1114rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1115{
1116 struct rt_addrinfo info;
1117 struct mbuf *m;
f23061d4 1118
841ab66c
SZ
1119 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1120 if (m == NULL)
1121 return;
1122
1123 /*
1124 * Append the ieee80211 data. Try to stick it in the
1125 * mbuf containing the ifannounce msg; otherwise allocate
1126 * a new mbuf and append.
1127 *
1128 * NB: we assume m is a single mbuf.
1129 */
1130 if (data_len > M_TRAILINGSPACE(m)) {
b11e1686 1131 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA);
841ab66c
SZ
1132 if (n == NULL) {
1133 m_freem(m);
1134 return;
1135 }
1136 bcopy(data, mtod(n, void *), data_len);
1137 n->m_len = data_len;
1138 m->m_next = n;
1139 } else if (data_len > 0) {
1140 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1141 m->m_len += data_len;
1142 }
e9fa4b60 1143 mbuftrackid(m, 33);
841ab66c
SZ
1144 if (m->m_flags & M_PKTHDR)
1145 m->m_pkthdr.len += data_len;
1146 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
590b8cd4 1147 rts_input(m, 0);
841ab66c
SZ
1148}
1149
1150/*
1151 * This is called to generate routing socket messages indicating
1152 * network interface arrival and departure.
1153 */
1154void
1155rt_ifannouncemsg(struct ifnet *ifp, int what)
1156{
1157 struct rt_addrinfo addrinfo;
1158 struct mbuf *m;
1159
1160 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo);
1161 if (m != NULL)
1162 rts_input(m, 0);
590b8cd4 1163}
f23061d4 1164
590b8cd4
JH
1165static int
1166resizewalkarg(struct walkarg *w, int len)
1167{
1168 void *newptr;
1169
efda3bd0 1170 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK);
590b8cd4
JH
1171 if (newptr == NULL)
1172 return (ENOMEM);
1173 if (w->w_tmem != NULL)
efda3bd0 1174 kfree(w->w_tmem, M_RTABLE);
590b8cd4
JH
1175 w->w_tmem = newptr;
1176 w->w_tmemsize = len;
1177 return (0);
1178}
984263bc
MD
1179
1180/*
1181 * This is used in dumping the kernel table via sysctl().
1182 */
1183int
590b8cd4 1184sysctl_dumpentry(struct radix_node *rn, void *vw)
984263bc 1185{
82ed7fc2
RG
1186 struct walkarg *w = vw;
1187 struct rtentry *rt = (struct rtentry *)rn;
590b8cd4
JH
1188 struct rt_addrinfo rtinfo;
1189 int error, msglen;
984263bc
MD
1190
1191 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1192 return 0;
f23061d4 1193
590b8cd4
JH
1194 bzero(&rtinfo, sizeof(struct rt_addrinfo));
1195 rtinfo.rti_dst = rt_key(rt);
1196 rtinfo.rti_gateway = rt->rt_gateway;
1197 rtinfo.rti_netmask = rt_mask(rt);
1198 rtinfo.rti_genmask = rt->rt_genmask;
ef87f48d 1199 if (rt->rt_ifp != NULL) {
590b8cd4 1200 rtinfo.rti_ifpaddr =
ef87f48d 1201 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr;
590b8cd4 1202 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr;
984263bc 1203 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
590b8cd4 1204 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr;
984263bc 1205 }
590b8cd4
JH
1206 msglen = rt_msgsize(RTM_GET, &rtinfo);
1207 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1208 return (ENOMEM);
1209 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen);
1210 if (w->w_req != NULL) {
8e63efec 1211 struct rt_msghdr *rtm = w->w_tmem;
984263bc
MD
1212
1213 rtm->rtm_flags = rt->rt_flags;
1214 rtm->rtm_use = rt->rt_use;
1215 rtm->rtm_rmx = rt->rt_rmx;
1216 rtm->rtm_index = rt->rt_ifp->if_index;
1217 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
590b8cd4
JH
1218 rtm->rtm_addrs = rtinfo.rti_addrs;
1219 error = SYSCTL_OUT(w->w_req, rtm, msglen);
984263bc
MD
1220 return (error);
1221 }
590b8cd4 1222 return (0);
984263bc
MD
1223}
1224
590b8cd4
JH
1225static int
1226sysctl_iflist(int af, struct walkarg *w)
984263bc 1227{
82ed7fc2
RG
1228 struct ifnet *ifp;
1229 struct ifaddr *ifa;
590b8cd4
JH
1230 struct rt_addrinfo rtinfo;
1231 int msglen, error;
984263bc 1232
590b8cd4 1233 bzero(&rtinfo, sizeof(struct rt_addrinfo));
984263bc
MD
1234 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1235 if (w->w_arg && w->w_arg != ifp->if_index)
1236 continue;
1237 ifa = TAILQ_FIRST(&ifp->if_addrhead);
590b8cd4
JH
1238 rtinfo.rti_ifpaddr = ifa->ifa_addr;
1239 msglen = rt_msgsize(RTM_IFINFO, &rtinfo);
1240 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0)
1241 return (ENOMEM);
1242 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen);
1243 rtinfo.rti_ifpaddr = NULL;
ef87f48d 1244 if (w->w_req != NULL && w->w_tmem != NULL) {
8e63efec 1245 struct if_msghdr *ifm = w->w_tmem;
984263bc 1246
984263bc 1247 ifm->ifm_index = ifp->if_index;
9c095379 1248 ifm->ifm_flags = ifp->if_flags;
984263bc 1249 ifm->ifm_data = ifp->if_data;
590b8cd4
JH
1250 ifm->ifm_addrs = rtinfo.rti_addrs;
1251 error = SYSCTL_OUT(w->w_req, ifm, msglen);
984263bc
MD
1252 if (error)
1253 return (error);
1254 }
ef87f48d 1255 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
984263bc
MD
1256 if (af && af != ifa->ifa_addr->sa_family)
1257 continue;
590b8cd4 1258 if (curproc->p_ucred->cr_prison &&
87de5057 1259 prison_if(curproc->p_ucred, ifa->ifa_addr))
984263bc 1260 continue;
590b8cd4
JH
1261 rtinfo.rti_ifaaddr = ifa->ifa_addr;
1262 rtinfo.rti_netmask = ifa->ifa_netmask;
1263 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr;
1264 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo);
1265 if (w->w_tmemsize < msglen &&
1266 resizewalkarg(w, msglen) != 0)
1267 return (ENOMEM);
1268 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen);
1269 if (w->w_req != NULL) {
8e63efec 1270 struct ifa_msghdr *ifam = w->w_tmem;
984263bc 1271
984263bc
MD
1272 ifam->ifam_index = ifa->ifa_ifp->if_index;
1273 ifam->ifam_flags = ifa->ifa_flags;
1274 ifam->ifam_metric = ifa->ifa_metric;
590b8cd4
JH
1275 ifam->ifam_addrs = rtinfo.rti_addrs;
1276 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen);
984263bc
MD
1277 if (error)
1278 return (error);
1279 }
1280 }
590b8cd4
JH
1281 rtinfo.rti_netmask = NULL;
1282 rtinfo.rti_ifaaddr = NULL;
1283 rtinfo.rti_bcastaddr = NULL;
984263bc
MD
1284 }
1285 return (0);
1286}
1287
1288static int
1289sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1290{
1291 int *name = (int *)arg1;
1292 u_int namelen = arg2;
82ed7fc2 1293 struct radix_node_head *rnh;
a49aa710 1294 int i, error = EINVAL;
ecdefdda 1295 int origcpu;
984263bc
MD
1296 u_char af;
1297 struct walkarg w;
1298
1299 name ++;
1300 namelen--;
1301 if (req->newptr)
1302 return (EPERM);
ecdefdda 1303 if (namelen != 3 && namelen != 4)
984263bc
MD
1304 return (EINVAL);
1305 af = name[0];
5fe66e68 1306 bzero(&w, sizeof w);
984263bc
MD
1307 w.w_op = name[1];
1308 w.w_arg = name[2];
1309 w.w_req = req;
1310
ecdefdda
MD
1311 /*
1312 * Optional third argument specifies cpu, used primarily for
1313 * debugging the route table.
1314 */
1315 if (namelen == 4) {
1316 if (name[3] < 0 || name[3] >= ncpus)
1317 return (EINVAL);
1318 origcpu = mycpuid;
1319 lwkt_migratecpu(name[3]);
1320 } else {
1321 origcpu = -1;
1322 }
a49aa710 1323 crit_enter();
984263bc 1324 switch (w.w_op) {
984263bc
MD
1325 case NET_RT_DUMP:
1326 case NET_RT_FLAGS:
1327 for (i = 1; i <= AF_MAX; i++)
ecdefdda
MD
1328 if ((rnh = rt_tables[mycpuid][i]) &&
1329 (af == 0 || af == i) &&
984263bc 1330 (error = rnh->rnh_walktree(rnh,
f23061d4 1331 sysctl_dumpentry, &w)))
984263bc
MD
1332 break;
1333 break;
1334
1335 case NET_RT_IFLIST:
1336 error = sysctl_iflist(af, &w);
1337 }
a49aa710 1338 crit_exit();
590b8cd4 1339 if (w.w_tmem != NULL)
efda3bd0 1340 kfree(w.w_tmem, M_RTABLE);
ecdefdda
MD
1341 if (origcpu >= 0)
1342 lwkt_migratecpu(origcpu);
984263bc
MD
1343 return (error);
1344}
1345
1346SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1347
1348/*
1349 * Definitions of protocols supported in the ROUTE domain.
1350 */
1351
ba4257b8 1352static struct domain routedomain; /* or at least forward */
984263bc
MD
1353
1354static struct protosw routesw[] = {
1355{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1356 0, route_output, raw_ctlinput, 0,
9eeaa8a9 1357 cpu0_soport,
984263bc
MD
1358 raw_init, 0, 0, 0,
1359 &route_usrreqs
1360}
1361};
1362
ba4257b8 1363static struct domain routedomain = {
9c70fe43
JH
1364 PF_ROUTE, "route", NULL, NULL, NULL,
1365 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])],
1366};
984263bc
MD
1367
1368DOMAIN_SET(route);
47db7f9b 1369