FreeBSD/Linux Kernel Cross Reference
sys/net/rtsock.c
1 /* $NetBSD: rtsock.c,v 1.67.2.1 2004/05/28 07:23:33 tron Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
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 project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1988, 1991, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: rtsock.c,v 1.67.2.1 2004/05/28 07:23:33 tron Exp $");
65
66 #include "opt_inet.h"
67
68 #include <sys/param.h>
69 #include <sys/systm.h>
70 #include <sys/proc.h>
71 #include <sys/mbuf.h>
72 #include <sys/socket.h>
73 #include <sys/socketvar.h>
74 #include <sys/domain.h>
75 #include <sys/protosw.h>
76 #include <sys/sysctl.h>
77
78 #include <net/if.h>
79 #include <net/route.h>
80 #include <net/raw_cb.h>
81
82 #include <machine/stdarg.h>
83
84 extern struct domain routedomain; /* or at least forward */
85
86 struct sockaddr route_dst = { 2, PF_ROUTE, };
87 struct sockaddr route_src = { 2, PF_ROUTE, };
88 struct sockproto route_proto = { PF_ROUTE, };
89
90 struct walkarg {
91 int w_op;
92 int w_arg;
93 int w_given;
94 int w_needed;
95 caddr_t w_where;
96 int w_tmemsize;
97 int w_tmemneeded;
98 caddr_t w_tmem;
99 };
100
101 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *, caddr_t, int));
102 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *,
103 int *));
104 static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *));
105 static int sysctl_dumpentry __P((struct radix_node *, void *));
106 static int sysctl_iflist __P((int, struct walkarg *, int));
107 static int sysctl_rtable __P((SYSCTLFN_PROTO));
108 static __inline void rt_adjustcount __P((int, int));
109
110 /* Sleazy use of local variables throughout file, warning!!!! */
111 #define dst info.rti_info[RTAX_DST]
112 #define gate info.rti_info[RTAX_GATEWAY]
113 #define netmask info.rti_info[RTAX_NETMASK]
114 #define genmask info.rti_info[RTAX_GENMASK]
115 #define ifpaddr info.rti_info[RTAX_IFP]
116 #define ifaaddr info.rti_info[RTAX_IFA]
117 #define brdaddr info.rti_info[RTAX_BRD]
118
119 static __inline void
120 rt_adjustcount(af, cnt)
121 int af, cnt;
122 {
123 route_cb.any_count += cnt;
124 switch (af) {
125 case AF_INET:
126 route_cb.ip_count += cnt;
127 return;
128 #ifdef INET6
129 case AF_INET6:
130 route_cb.ip6_count += cnt;
131 return;
132 #endif
133 case AF_IPX:
134 route_cb.ipx_count += cnt;
135 return;
136 case AF_NS:
137 route_cb.ns_count += cnt;
138 return;
139 case AF_ISO:
140 route_cb.iso_count += cnt;
141 return;
142 }
143 }
144
145 /*ARGSUSED*/
146 int
147 route_usrreq(so, req, m, nam, control, p)
148 struct socket *so;
149 int req;
150 struct mbuf *m, *nam, *control;
151 struct proc *p;
152 {
153 int error = 0;
154 struct rawcb *rp = sotorawcb(so);
155 int s;
156
157 if (req == PRU_ATTACH) {
158 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK);
159 if ((so->so_pcb = rp) != NULL)
160 memset(so->so_pcb, 0, sizeof(*rp));
161
162 }
163 if (req == PRU_DETACH && rp)
164 rt_adjustcount(rp->rcb_proto.sp_protocol, -1);
165 s = splsoftnet();
166
167 /*
168 * Don't call raw_usrreq() in the attach case, because
169 * we want to allow non-privileged processes to listen on
170 * and send "safe" commands to the routing socket.
171 */
172 if (req == PRU_ATTACH) {
173 if (p == 0)
174 error = EACCES;
175 else
176 error = raw_attach(so, (int)(long)nam);
177 } else
178 error = raw_usrreq(so, req, m, nam, control, p);
179
180 rp = sotorawcb(so);
181 if (req == PRU_ATTACH && rp) {
182 if (error) {
183 free((caddr_t)rp, M_PCB);
184 splx(s);
185 return (error);
186 }
187 rt_adjustcount(rp->rcb_proto.sp_protocol, 1);
188 rp->rcb_laddr = &route_src;
189 rp->rcb_faddr = &route_dst;
190 soisconnected(so);
191 so->so_options |= SO_USELOOPBACK;
192 }
193 splx(s);
194 return (error);
195 }
196
197 /*ARGSUSED*/
198 int
199 #if __STDC__
200 route_output(struct mbuf *m, ...)
201 #else
202 route_output(m, va_alist)
203 struct mbuf *m;
204 va_dcl
205 #endif
206 {
207 struct rt_msghdr *rtm = 0;
208 struct radix_node *rn = 0;
209 struct rtentry *rt = 0;
210 struct rtentry *saved_nrt = 0;
211 struct radix_node_head *rnh;
212 struct rt_addrinfo info;
213 int len, error = 0;
214 struct ifnet *ifp = 0;
215 struct ifaddr *ifa = 0;
216 struct socket *so;
217 va_list ap;
218 sa_family_t family;
219
220 va_start(ap, m);
221 so = va_arg(ap, struct socket *);
222 va_end(ap);
223
224 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0)
225 if (m == 0 || ((m->m_len < sizeof(int32_t)) &&
226 (m = m_pullup(m, sizeof(int32_t))) == 0))
227 return (ENOBUFS);
228 if ((m->m_flags & M_PKTHDR) == 0)
229 panic("route_output");
230 len = m->m_pkthdr.len;
231 if (len < sizeof(*rtm) ||
232 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
233 dst = 0;
234 senderr(EINVAL);
235 }
236 R_Malloc(rtm, struct rt_msghdr *, len);
237 if (rtm == 0) {
238 dst = 0;
239 senderr(ENOBUFS);
240 }
241 m_copydata(m, 0, len, (caddr_t)rtm);
242 if (rtm->rtm_version != RTM_VERSION) {
243 dst = 0;
244 senderr(EPROTONOSUPPORT);
245 }
246 rtm->rtm_pid = curproc->p_pid;
247 memset(&info, 0, sizeof(info));
248 info.rti_addrs = rtm->rtm_addrs;
249 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info))
250 senderr(EINVAL);
251 info.rti_flags = rtm->rtm_flags;
252 if (dst == 0 || (dst->sa_family >= AF_MAX))
253 senderr(EINVAL);
254 if (gate != 0 && (gate->sa_family >= AF_MAX))
255 senderr(EINVAL);
256 if (genmask) {
257 struct radix_node *t;
258 t = rn_addmask((caddr_t)genmask, 0, 1);
259 if (t && genmask->sa_len >= ((struct sockaddr *)t->rn_key)->sa_len &&
260 Bcmp((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1,
261 ((struct sockaddr *)t->rn_key)->sa_len) - 1)
262 genmask = (struct sockaddr *)(t->rn_key);
263 else
264 senderr(ENOBUFS);
265 }
266
267 /*
268 * Verify that the caller has the appropriate privilege; RTM_GET
269 * is the only operation the non-superuser is allowed.
270 */
271 if (rtm->rtm_type != RTM_GET &&
272 suser(curproc->p_ucred, &curproc->p_acflag) != 0)
273 senderr(EACCES);
274
275 switch (rtm->rtm_type) {
276
277 case RTM_ADD:
278 if (gate == 0)
279 senderr(EINVAL);
280 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt);
281 if (error == 0 && saved_nrt) {
282 rt_setmetrics(rtm->rtm_inits,
283 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
284 saved_nrt->rt_refcnt--;
285 saved_nrt->rt_genmask = genmask;
286 }
287 break;
288
289 case RTM_DELETE:
290 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt);
291 if (error == 0) {
292 (rt = saved_nrt)->rt_refcnt++;
293 goto report;
294 }
295 break;
296
297 case RTM_GET:
298 case RTM_CHANGE:
299 case RTM_LOCK:
300 if ((rnh = rt_tables[dst->sa_family]) == 0) {
301 senderr(EAFNOSUPPORT);
302 }
303 rn = rnh->rnh_lookup(dst, netmask, rnh);
304 if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) {
305 senderr(ESRCH);
306 }
307 rt = (struct rtentry *)rn;
308 rt->rt_refcnt++;
309 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */
310 struct radix_node *rn;
311 extern struct radix_node_head *mask_rnhead;
312
313 if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0)
314 senderr(ESRCH);
315 if (netmask && (rn = rn_search(netmask,
316 mask_rnhead->rnh_treetop)))
317 netmask = (struct sockaddr *)rn->rn_key;
318 for (rn = rt->rt_nodes; rn; rn = rn->rn_dupedkey)
319 if (netmask == (struct sockaddr *)rn->rn_mask)
320 break;
321 if (rn == 0)
322 senderr(ETOOMANYREFS);
323 rt = (struct rtentry *)rn;
324 }
325
326 switch (rtm->rtm_type) {
327 case RTM_GET:
328 report:
329 dst = rt_key(rt);
330 gate = rt->rt_gateway;
331 netmask = rt_mask(rt);
332 genmask = rt->rt_genmask;
333 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
334 if ((ifp = rt->rt_ifp) != NULL) {
335 ifpaddr = TAILQ_FIRST(&ifp->if_addrlist)->ifa_addr;
336 ifaaddr = rt->rt_ifa->ifa_addr;
337 if (ifp->if_flags & IFF_POINTOPOINT)
338 brdaddr = rt->rt_ifa->ifa_dstaddr;
339 else
340 brdaddr = 0;
341 rtm->rtm_index = ifp->if_index;
342 } else {
343 ifpaddr = 0;
344 ifaaddr = 0;
345 }
346 }
347 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
348 (struct walkarg *)0, &len);
349 if (len > rtm->rtm_msglen) {
350 struct rt_msghdr *new_rtm;
351 R_Malloc(new_rtm, struct rt_msghdr *, len);
352 if (new_rtm == 0)
353 senderr(ENOBUFS);
354 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
355 Free(rtm); rtm = new_rtm;
356 }
357 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
358 (struct walkarg *)0, 0);
359 rtm->rtm_flags = rt->rt_flags;
360 rtm->rtm_rmx = rt->rt_rmx;
361 rtm->rtm_addrs = info.rti_addrs;
362 break;
363
364 case RTM_CHANGE:
365 /*
366 * new gateway could require new ifaddr, ifp;
367 * flags may also be different; ifp may be specified
368 * by ll sockaddr when protocol address is ambiguous
369 */
370 if ((error = rt_getifa(&info)) != 0)
371 senderr(error);
372 if (gate && rt_setgate(rt, rt_key(rt), gate))
373 senderr(EDQUOT);
374 /* new gateway could require new ifaddr, ifp;
375 flags may also be different; ifp may be specified
376 by ll sockaddr when protocol address is ambiguous */
377 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) &&
378 (ifp = ifa->ifa_ifp) && (ifaaddr || gate))
379 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate,
380 ifp);
381 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) ||
382 (gate && (ifa = ifa_ifwithroute(rt->rt_flags,
383 rt_key(rt), gate))))
384 ifp = ifa->ifa_ifp;
385 if (ifa) {
386 struct ifaddr *oifa = rt->rt_ifa;
387 if (oifa != ifa) {
388 if (oifa && oifa->ifa_rtrequest)
389 oifa->ifa_rtrequest(RTM_DELETE, rt,
390 &info);
391 IFAFREE(rt->rt_ifa);
392 rt->rt_ifa = ifa;
393 IFAREF(rt->rt_ifa);
394 rt->rt_ifp = ifp;
395 }
396 }
397 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
398 &rt->rt_rmx);
399 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
400 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
401 if (genmask)
402 rt->rt_genmask = genmask;
403 /*
404 * Fall into
405 */
406 case RTM_LOCK:
407 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
408 rt->rt_rmx.rmx_locks |=
409 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
410 break;
411 }
412 break;
413
414 default:
415 senderr(EOPNOTSUPP);
416 }
417
418 flush:
419 if (rtm) {
420 if (error)
421 rtm->rtm_errno = error;
422 else
423 rtm->rtm_flags |= RTF_DONE;
424 }
425 family = dst ? dst->sa_family : 0;
426 if (rt)
427 rtfree(rt);
428 {
429 struct rawcb *rp = 0;
430 /*
431 * Check to see if we don't want our own messages.
432 */
433 if ((so->so_options & SO_USELOOPBACK) == 0) {
434 if (route_cb.any_count <= 1) {
435 if (rtm)
436 Free(rtm);
437 m_freem(m);
438 return (error);
439 }
440 /* There is another listener, so construct message */
441 rp = sotorawcb(so);
442 }
443 if (rtm) {
444 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
445 if (m->m_pkthdr.len < rtm->rtm_msglen) {
446 m_freem(m);
447 m = NULL;
448 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
449 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
450 Free(rtm);
451 }
452 if (rp)
453 rp->rcb_proto.sp_family = 0; /* Avoid us */
454 if (family)
455 route_proto.sp_protocol = family;
456 if (m)
457 raw_input(m, &route_proto, &route_src, &route_dst);
458 if (rp)
459 rp->rcb_proto.sp_family = PF_ROUTE;
460 }
461 return (error);
462 }
463
464 void
465 rt_setmetrics(which, in, out)
466 u_long which;
467 struct rt_metrics *in, *out;
468 {
469 #define metric(f, e) if (which & (f)) out->e = in->e;
470 metric(RTV_RPIPE, rmx_recvpipe);
471 metric(RTV_SPIPE, rmx_sendpipe);
472 metric(RTV_SSTHRESH, rmx_ssthresh);
473 metric(RTV_RTT, rmx_rtt);
474 metric(RTV_RTTVAR, rmx_rttvar);
475 metric(RTV_HOPCOUNT, rmx_hopcount);
476 metric(RTV_MTU, rmx_mtu);
477 metric(RTV_EXPIRE, rmx_expire);
478 #undef metric
479 }
480
481 #define ROUNDUP(a) \
482 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
483 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
484
485 static int
486 rt_xaddrs(cp, cplim, rtinfo)
487 caddr_t cp, cplim;
488 struct rt_addrinfo *rtinfo;
489 {
490 struct sockaddr *sa = NULL; /* Quell compiler warning */
491 int i;
492
493 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
494 if ((rtinfo->rti_addrs & (1 << i)) == 0)
495 continue;
496 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
497 ADVANCE(cp, sa);
498 }
499
500 /* Check for extra addresses specified. */
501 if ((rtinfo->rti_addrs & (~0 << i)) != 0)
502 return (1);
503 /* Check for bad data length. */
504 if (cp != cplim) {
505 if (i == RTAX_NETMASK + 1 &&
506 cp - ROUNDUP(sa->sa_len) + sa->sa_len == cplim)
507 /*
508 * The last sockaddr was netmask.
509 * We accept this for now for the sake of old
510 * binaries or third party softwares.
511 */
512 ;
513 else
514 return (1);
515 }
516 return (0);
517 }
518
519 static struct mbuf *
520 rt_msg1(type, rtinfo, data, datalen)
521 int type;
522 struct rt_addrinfo *rtinfo;
523 caddr_t data;
524 int datalen;
525 {
526 struct rt_msghdr *rtm;
527 struct mbuf *m;
528 int i;
529 struct sockaddr *sa;
530 int len, dlen;
531
532 m = m_gethdr(M_DONTWAIT, MT_DATA);
533 if (m == 0)
534 return (m);
535 MCLAIM(m, &routedomain.dom_mowner);
536 switch (type) {
537
538 case RTM_DELADDR:
539 case RTM_NEWADDR:
540 len = sizeof(struct ifa_msghdr);
541 break;
542
543 #ifdef COMPAT_14
544 case RTM_OIFINFO:
545 len = sizeof(struct if_msghdr14);
546 break;
547 #endif
548
549 case RTM_IFINFO:
550 len = sizeof(struct if_msghdr);
551 break;
552
553 case RTM_IFANNOUNCE:
554 len = sizeof(struct if_announcemsghdr);
555 break;
556
557 default:
558 len = sizeof(struct rt_msghdr);
559 }
560 if (len > MHLEN + MLEN)
561 panic("rt_msg1: message too long");
562 else if (len > MHLEN) {
563 m->m_next = m_get(M_DONTWAIT, MT_DATA);
564 if (m->m_next == NULL) {
565 m_freem(m);
566 return (NULL);
567 }
568 MCLAIM(m->m_next, m->m_owner);
569 m->m_pkthdr.len = len;
570 m->m_len = MHLEN;
571 m->m_next->m_len = len - MHLEN;
572 } else {
573 m->m_pkthdr.len = m->m_len = len;
574 }
575 m->m_pkthdr.rcvif = 0;
576 m_copyback(m, 0, datalen, data);
577 rtm = mtod(m, struct rt_msghdr *);
578 for (i = 0; i < RTAX_MAX; i++) {
579 if ((sa = rtinfo->rti_info[i]) == NULL)
580 continue;
581 rtinfo->rti_addrs |= (1 << i);
582 dlen = ROUNDUP(sa->sa_len);
583 m_copyback(m, len, dlen, (caddr_t)sa);
584 len += dlen;
585 }
586 if (m->m_pkthdr.len != len) {
587 m_freem(m);
588 return (NULL);
589 }
590 rtm->rtm_msglen = len;
591 rtm->rtm_version = RTM_VERSION;
592 rtm->rtm_type = type;
593 return (m);
594 }
595
596 /*
597 * rt_msg2
598 *
599 * fills 'cp' or 'w'.w_tmem with the routing socket message and
600 * returns the length of the message in 'lenp'.
601 *
602 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold
603 * the message
604 * otherwise walkarg's w_needed is updated and if the user buffer is
605 * specified and w_needed indicates space exists the information is copied
606 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary,
607 * if the allocation fails ENOBUFS is returned.
608 */
609 static int
610 rt_msg2(type, rtinfo, cp, w, lenp)
611 int type;
612 struct rt_addrinfo *rtinfo;
613 caddr_t cp;
614 struct walkarg *w;
615 int *lenp;
616 {
617 int i;
618 int len, dlen, second_time = 0;
619 caddr_t cp0;
620
621 rtinfo->rti_addrs = 0;
622 again:
623 switch (type) {
624
625 case RTM_DELADDR:
626 case RTM_NEWADDR:
627 len = sizeof(struct ifa_msghdr);
628 break;
629 #ifdef COMPAT_14
630 case RTM_OIFINFO:
631 len = sizeof(struct if_msghdr14);
632 break;
633 #endif
634
635 case RTM_IFINFO:
636 len = sizeof(struct if_msghdr);
637 break;
638
639 default:
640 len = sizeof(struct rt_msghdr);
641 }
642 if ((cp0 = cp) != NULL)
643 cp += len;
644 for (i = 0; i < RTAX_MAX; i++) {
645 struct sockaddr *sa;
646
647 if ((sa = rtinfo->rti_info[i]) == 0)
648 continue;
649 rtinfo->rti_addrs |= (1 << i);
650 dlen = ROUNDUP(sa->sa_len);
651 if (cp) {
652 bcopy(sa, cp, (unsigned)dlen);
653 cp += dlen;
654 }
655 len += dlen;
656 }
657 if (cp == 0 && w != NULL && !second_time) {
658 struct walkarg *rw = w;
659
660 rw->w_needed += len;
661 if (rw->w_needed <= 0 && rw->w_where) {
662 if (rw->w_tmemsize < len) {
663 if (rw->w_tmem)
664 free(rw->w_tmem, M_RTABLE);
665 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE,
666 M_NOWAIT);
667 if (rw->w_tmem)
668 rw->w_tmemsize = len;
669 }
670 if (rw->w_tmem) {
671 cp = rw->w_tmem;
672 second_time = 1;
673 goto again;
674 } else {
675 rw->w_tmemneeded = len;
676 return (ENOBUFS);
677 }
678 }
679 }
680 if (cp) {
681 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
682
683 rtm->rtm_version = RTM_VERSION;
684 rtm->rtm_type = type;
685 rtm->rtm_msglen = len;
686 }
687 if (lenp)
688 *lenp = len;
689 return (0);
690 }
691
692 /*
693 * This routine is called to generate a message from the routing
694 * socket indicating that a redirect has occurred, a routing lookup
695 * has failed, or that a protocol has detected timeouts to a particular
696 * destination.
697 */
698 void
699 rt_missmsg(type, rtinfo, flags, error)
700 int type, flags, error;
701 struct rt_addrinfo *rtinfo;
702 {
703 struct rt_msghdr rtm;
704 struct mbuf *m;
705 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
706
707 if (route_cb.any_count == 0)
708 return;
709 memset(&rtm, 0, sizeof(rtm));
710 rtm.rtm_flags = RTF_DONE | flags;
711 rtm.rtm_errno = error;
712 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm));
713 if (m == 0)
714 return;
715 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs;
716 route_proto.sp_protocol = sa ? sa->sa_family : 0;
717 raw_input(m, &route_proto, &route_src, &route_dst);
718 }
719
720 /*
721 * This routine is called to generate a message from the routing
722 * socket indicating that the status of a network interface has changed.
723 */
724 void
725 rt_ifmsg(ifp)
726 struct ifnet *ifp;
727 {
728 struct if_msghdr ifm;
729 #ifdef COMPAT_14
730 struct if_msghdr14 oifm;
731 #endif
732 struct mbuf *m;
733 struct rt_addrinfo info;
734
735 if (route_cb.any_count == 0)
736 return;
737 memset(&info, 0, sizeof(info));
738 memset(&ifm, 0, sizeof(ifm));
739 ifm.ifm_index = ifp->if_index;
740 ifm.ifm_flags = ifp->if_flags;
741 ifm.ifm_data = ifp->if_data;
742 ifm.ifm_addrs = 0;
743 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm));
744 if (m == 0)
745 return;
746 route_proto.sp_protocol = 0;
747 raw_input(m, &route_proto, &route_src, &route_dst);
748 #ifdef COMPAT_14
749 memset(&info, 0, sizeof(info));
750 memset(&oifm, 0, sizeof(oifm));
751 oifm.ifm_index = ifp->if_index;
752 oifm.ifm_flags = ifp->if_flags;
753 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type;
754 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen;
755 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen;
756 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu;
757 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric;
758 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate;
759 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets;
760 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors;
761 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets;
762 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors;
763 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions;
764 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes;
765 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes;
766 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts;
767 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts;
768 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops;
769 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto;
770 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange;
771 oifm.ifm_addrs = 0;
772 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm));
773 if (m == 0)
774 return;
775 route_proto.sp_protocol = 0;
776 raw_input(m, &route_proto, &route_src, &route_dst);
777 #endif
778 }
779
780 /*
781 * This is called to generate messages from the routing socket
782 * indicating a network interface has had addresses associated with it.
783 * if we ever reverse the logic and replace messages TO the routing
784 * socket indicate a request to configure interfaces, then it will
785 * be unnecessary as the routing socket will automatically generate
786 * copies of it.
787 */
788 void
789 rt_newaddrmsg(cmd, ifa, error, rt)
790 int cmd, error;
791 struct ifaddr *ifa;
792 struct rtentry *rt;
793 {
794 struct rt_addrinfo info;
795 struct sockaddr *sa = NULL;
796 int pass;
797 struct mbuf *m = NULL;
798 struct ifnet *ifp = ifa->ifa_ifp;
799
800 if (route_cb.any_count == 0)
801 return;
802 for (pass = 1; pass < 3; pass++) {
803 memset(&info, 0, sizeof(info));
804 if ((cmd == RTM_ADD && pass == 1) ||
805 (cmd == RTM_DELETE && pass == 2)) {
806 struct ifa_msghdr ifam;
807 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
808
809 ifaaddr = sa = ifa->ifa_addr;
810 ifpaddr = TAILQ_FIRST(&ifp->if_addrlist)->ifa_addr;
811 netmask = ifa->ifa_netmask;
812 brdaddr = ifa->ifa_dstaddr;
813 memset(&ifam, 0, sizeof(ifam));
814 ifam.ifam_index = ifp->if_index;
815 ifam.ifam_metric = ifa->ifa_metric;
816 ifam.ifam_flags = ifa->ifa_flags;
817 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam));
818 if (m == NULL)
819 continue;
820 mtod(m, struct ifa_msghdr *)->ifam_addrs =
821 info.rti_addrs;
822 }
823 if ((cmd == RTM_ADD && pass == 2) ||
824 (cmd == RTM_DELETE && pass == 1)) {
825 struct rt_msghdr rtm;
826
827 if (rt == 0)
828 continue;
829 netmask = rt_mask(rt);
830 dst = sa = rt_key(rt);
831 gate = rt->rt_gateway;
832 memset(&rtm, 0, sizeof(rtm));
833 rtm.rtm_index = ifp->if_index;
834 rtm.rtm_flags |= rt->rt_flags;
835 rtm.rtm_errno = error;
836 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm));
837 if (m == NULL)
838 continue;
839 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs;
840 }
841 route_proto.sp_protocol = sa ? sa->sa_family : 0;
842 raw_input(m, &route_proto, &route_src, &route_dst);
843 }
844 }
845
846 /*
847 * This is called to generate routing socket messages indicating
848 * network interface arrival and departure.
849 */
850 void
851 rt_ifannouncemsg(ifp, what)
852 struct ifnet *ifp;
853 int what;
854 {
855 struct if_announcemsghdr ifan;
856 struct mbuf *m;
857 struct rt_addrinfo info;
858
859 if (route_cb.any_count == 0)
860 return;
861 memset(&info, 0, sizeof(info));
862 memset(&ifan, 0, sizeof(ifan));
863 ifan.ifan_index = ifp->if_index;
864 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name));
865 ifan.ifan_what = what;
866 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan));
867 if (m == 0)
868 return;
869 route_proto.sp_protocol = 0;
870 raw_input(m, &route_proto, &route_src, &route_dst);
871 }
872
873 /*
874 * This is used in dumping the kernel table via sysctl().
875 */
876 static int
877 sysctl_dumpentry(rn, v)
878 struct radix_node *rn;
879 void *v;
880 {
881 struct walkarg *w = v;
882 struct rtentry *rt = (struct rtentry *)rn;
883 int error = 0, size;
884 struct rt_addrinfo info;
885
886 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
887 return 0;
888 memset(&info, 0, sizeof(info));
889 dst = rt_key(rt);
890 gate = rt->rt_gateway;
891 netmask = rt_mask(rt);
892 genmask = rt->rt_genmask;
893 if (rt->rt_ifp) {
894 ifpaddr = TAILQ_FIRST(&rt->rt_ifp->if_addrlist)->ifa_addr;
895 ifaaddr = rt->rt_ifa->ifa_addr;
896 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
897 brdaddr = rt->rt_ifa->ifa_dstaddr;
898 }
899 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size)))
900 return (error);
901 if (w->w_where && w->w_tmem && w->w_needed <= 0) {
902 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
903
904 rtm->rtm_flags = rt->rt_flags;
905 rtm->rtm_use = rt->rt_use;
906 rtm->rtm_rmx = rt->rt_rmx;
907 rtm->rtm_index = rt->rt_ifp->if_index;
908 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
909 rtm->rtm_addrs = info.rti_addrs;
910 if ((error = copyout(rtm, w->w_where, size)) != 0)
911 w->w_where = NULL;
912 else
913 w->w_where += size;
914 }
915 return (error);
916 }
917
918 static int
919 sysctl_iflist(af, w, type)
920 int af;
921 struct walkarg *w;
922 int type;
923 {
924 struct ifnet *ifp;
925 struct ifaddr *ifa;
926 struct rt_addrinfo info;
927 int len, error = 0;
928
929 memset(&info, 0, sizeof(info));
930 TAILQ_FOREACH(ifp, &ifnet, if_list) {
931 if (w->w_arg && w->w_arg != ifp->if_index)
932 continue;
933 ifa = TAILQ_FIRST(&ifp->if_addrlist);
934 ifpaddr = ifa->ifa_addr;
935 switch (type) {
936 case NET_RT_IFLIST:
937 error =
938 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len);
939 break;
940 #ifdef COMPAT_14
941 case NET_RT_OIFLIST:
942 error =
943 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len);
944 break;
945 #endif
946 default:
947 panic("sysctl_iflist(1)");
948 }
949 if (error)
950 return (error);
951 ifpaddr = 0;
952 if (w->w_where && w->w_tmem && w->w_needed <= 0) {
953 switch (type) {
954 case NET_RT_IFLIST: {
955 struct if_msghdr *ifm;
956
957 ifm = (struct if_msghdr *)w->w_tmem;
958 ifm->ifm_index = ifp->if_index;
959 ifm->ifm_flags = ifp->if_flags;
960 ifm->ifm_data = ifp->if_data;
961 ifm->ifm_addrs = info.rti_addrs;
962 error = copyout(ifm, w->w_where, len);
963 if (error)
964 return (error);
965 w->w_where += len;
966 break;
967 }
968
969 #ifdef COMPAT_14
970 case NET_RT_OIFLIST: {
971 struct if_msghdr14 *ifm;
972
973 ifm = (struct if_msghdr14 *)w->w_tmem;
974 ifm->ifm_index = ifp->if_index;
975 ifm->ifm_flags = ifp->if_flags;
976 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type;
977 ifm->ifm_data.ifi_addrlen =
978 ifp->if_data.ifi_addrlen;
979 ifm->ifm_data.ifi_hdrlen =
980 ifp->if_data.ifi_hdrlen;
981 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu;
982 ifm->ifm_data.ifi_metric =
983 ifp->if_data.ifi_metric;
984 ifm->ifm_data.ifi_baudrate =
985 ifp->if_data.ifi_baudrate;
986 ifm->ifm_data.ifi_ipackets =
987 ifp->if_data.ifi_ipackets;
988 ifm->ifm_data.ifi_ierrors =
989 ifp->if_data.ifi_ierrors;
990 ifm->ifm_data.ifi_opackets =
991 ifp->if_data.ifi_opackets;
992 ifm->ifm_data.ifi_oerrors =
993 ifp->if_data.ifi_oerrors;
994 ifm->ifm_data.ifi_collisions =
995 ifp->if_data.ifi_collisions;
996 ifm->ifm_data.ifi_ibytes =
997 ifp->if_data.ifi_ibytes;
998 ifm->ifm_data.ifi_obytes =
999 ifp->if_data.ifi_obytes;
1000 ifm->ifm_data.ifi_imcasts =
1001 ifp->if_data.ifi_imcasts;
1002 ifm->ifm_data.ifi_omcasts =
1003 ifp->if_data.ifi_omcasts;
1004 ifm->ifm_data.ifi_iqdrops =
1005 ifp->if_data.ifi_iqdrops;
1006 ifm->ifm_data.ifi_noproto =
1007 ifp->if_data.ifi_noproto;
1008 ifm->ifm_data.ifi_lastchange =
1009 ifp->if_data.ifi_lastchange;
1010 ifm->ifm_addrs = info.rti_addrs;
1011 error = copyout(ifm, w->w_where, len);
1012 if (error)
1013 return (error);
1014 w->w_where += len;
1015 break;
1016 }
1017 #endif
1018 default:
1019 panic("sysctl_iflist(2)");
1020 }
1021 }
1022 while ((ifa = TAILQ_NEXT(ifa, ifa_list)) != NULL) {
1023 if (af && af != ifa->ifa_addr->sa_family)
1024 continue;
1025 ifaaddr = ifa->ifa_addr;
1026 netmask = ifa->ifa_netmask;
1027 brdaddr = ifa->ifa_dstaddr;
1028 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len)))
1029 return (error);
1030 if (w->w_where && w->w_tmem && w->w_needed <= 0) {
1031 struct ifa_msghdr *ifam;
1032
1033 ifam = (struct ifa_msghdr *)w->w_tmem;
1034 ifam->ifam_index = ifa->ifa_ifp->if_index;
1035 ifam->ifam_flags = ifa->ifa_flags;
1036 ifam->ifam_metric = ifa->ifa_metric;
1037 ifam->ifam_addrs = info.rti_addrs;
1038 error = copyout(w->w_tmem, w->w_where, len);
1039 if (error)
1040 return (error);
1041 w->w_where += len;
1042 }
1043 }
1044 ifaaddr = netmask = brdaddr = 0;
1045 }
1046 return (0);
1047 }
1048
1049 static int
1050 sysctl_rtable(SYSCTLFN_ARGS)
1051 {
1052 void *where = oldp;
1053 size_t *given = oldlenp;
1054 const void *new = newp;
1055 struct radix_node_head *rnh;
1056 int i, s, error = EINVAL;
1057 u_char af;
1058 struct walkarg w;
1059
1060 if (namelen == 1 && name[0] == CTL_QUERY)
1061 return (sysctl_query(SYSCTLFN_CALL(rnode)));
1062
1063 if (new)
1064 return (EPERM);
1065 if (namelen != 3)
1066 return (EINVAL);
1067 af = name[0];
1068 w.w_tmemneeded = 0;
1069 w.w_tmemsize = 0;
1070 w.w_tmem = NULL;
1071 again:
1072 /* we may return here if a later [re]alloc of the t_mem buffer fails */
1073 if (w.w_tmemneeded) {
1074 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK);
1075 w.w_tmemsize = w.w_tmemneeded;
1076 w.w_tmemneeded = 0;
1077 }
1078 w.w_op = name[1];
1079 w.w_arg = name[2];
1080 w.w_given = *given;
1081 w.w_needed = 0 - w.w_given;
1082 w.w_where = where;
1083
1084 s = splsoftnet();
1085 switch (w.w_op) {
1086
1087 case NET_RT_DUMP:
1088 case NET_RT_FLAGS:
1089 for (i = 1; i <= AF_MAX; i++)
1090 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
1091 (error = (*rnh->rnh_walktree)(rnh,
1092 sysctl_dumpentry, &w)))
1093 break;
1094 break;
1095
1096 #ifdef COMPAT_14
1097 case NET_RT_OIFLIST:
1098 error = sysctl_iflist(af, &w, w.w_op);
1099 break;
1100 #endif
1101
1102 case NET_RT_IFLIST:
1103 error = sysctl_iflist(af, &w, w.w_op);
1104 }
1105 splx(s);
1106
1107 /* check to see if we couldn't allocate memory with NOWAIT */
1108 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded)
1109 goto again;
1110
1111 if (w.w_tmem)
1112 free(w.w_tmem, M_RTABLE);
1113 w.w_needed += w.w_given;
1114 if (where) {
1115 *given = w.w_where - (caddr_t) where;
1116 if (*given < w.w_needed)
1117 return (ENOMEM);
1118 } else {
1119 *given = (11 * w.w_needed) / 10;
1120 }
1121 return (error);
1122 }
1123
1124 /*
1125 * Definitions of protocols supported in the ROUTE domain.
1126 */
1127
1128 struct protosw routesw[] = {
1129 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
1130 raw_input, route_output, raw_ctlinput, 0,
1131 route_usrreq,
1132 raw_init, 0, 0, 0,
1133 NULL /* @@@ */,
1134 }
1135 };
1136
1137 struct domain routedomain =
1138 { PF_ROUTE, "route", route_init, 0, 0,
1139 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
1140
1141 SYSCTL_SETUP(sysctl_net_route_setup, "sysctl net.route subtree setup")
1142 {
1143 sysctl_createv(clog, 0, NULL, NULL,
1144 CTLFLAG_PERMANENT,
1145 CTLTYPE_NODE, "net", NULL,
1146 NULL, 0, NULL, 0,
1147 CTL_NET, CTL_EOL);
1148
1149 sysctl_createv(clog, 0, NULL, NULL,
1150 CTLFLAG_PERMANENT,
1151 CTLTYPE_NODE, "route",
1152 SYSCTL_DESCR("PF_ROUTE information"),
1153 NULL, 0, NULL, 0,
1154 CTL_NET, PF_ROUTE, CTL_EOL);
1155 sysctl_createv(clog, 0, NULL, NULL,
1156 CTLFLAG_PERMANENT,
1157 CTLTYPE_NODE, "rtable",
1158 SYSCTL_DESCR("Routing table information"),
1159 sysctl_rtable, 0, NULL, 0,
1160 CTL_NET, PF_ROUTE, 0 /* any protocol */, CTL_EOL);
1161 }
Cache object: 7bd9a96b354cc026963382fbb7689a4a
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