1 | /* $NetBSD: rtsock.c,v 1.198 2016/10/26 06:49:10 ozaki-r 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 1.198 2016/10/26 06:49:10 ozaki-r Exp $" ); |
65 | |
66 | #ifdef _KERNEL_OPT |
67 | #include "opt_inet.h" |
68 | #include "opt_mpls.h" |
69 | #include "opt_compat_netbsd.h" |
70 | #include "opt_sctp.h" |
71 | #endif |
72 | |
73 | #include <sys/param.h> |
74 | #include <sys/systm.h> |
75 | #include <sys/proc.h> |
76 | #include <sys/socket.h> |
77 | #include <sys/socketvar.h> |
78 | #include <sys/domain.h> |
79 | #include <sys/protosw.h> |
80 | #include <sys/sysctl.h> |
81 | #include <sys/kauth.h> |
82 | #include <sys/kmem.h> |
83 | #include <sys/intr.h> |
84 | |
85 | #include <net/if.h> |
86 | #include <net/if_llatbl.h> |
87 | #include <net/if_types.h> |
88 | #include <net/route.h> |
89 | #include <net/raw_cb.h> |
90 | |
91 | #include <netinet/in_var.h> |
92 | #include <netinet/if_inarp.h> |
93 | |
94 | #include <netmpls/mpls.h> |
95 | |
96 | #ifdef SCTP |
97 | extern void sctp_add_ip_address(struct ifaddr *); |
98 | extern void sctp_delete_ip_address(struct ifaddr *); |
99 | #endif |
100 | |
101 | #if defined(COMPAT_14) || defined(COMPAT_50) || defined(COMPAT_70) |
102 | #include <compat/net/if.h> |
103 | #include <compat/net/route.h> |
104 | #endif |
105 | #ifdef COMPAT_RTSOCK |
106 | #define RTM_XVERSION RTM_OVERSION |
107 | #define RTM_XNEWADDR RTM_ONEWADDR |
108 | #define RTM_XDELADDR RTM_ODELADDR |
109 | #define RTM_XCHGADDR RTM_OCHGADDR |
110 | #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) |
111 | #define RT_XROUNDUP(n) RT_OROUNDUP(n) |
112 | #define PF_XROUTE PF_OROUTE |
113 | #define rt_xmsghdr rt_msghdr50 |
114 | #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ |
115 | #define ifa_xmsghdr ifa_msghdr50 |
116 | #define if_xannouncemsghdr if_announcemsghdr50 |
117 | #define COMPATNAME(x) compat_50_ ## x |
118 | #define DOMAINNAME "oroute" |
119 | CTASSERT(sizeof(struct ifa_xmsghdr) == 20); |
120 | DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ |
121 | #undef COMPAT_70 |
122 | #else /* COMPAT_RTSOCK */ |
123 | #define RTM_XVERSION RTM_VERSION |
124 | #define RTM_XNEWADDR RTM_NEWADDR |
125 | #define RTM_XDELADDR RTM_DELADDR |
126 | #define RTM_XCHGADDR RTM_CHGADDR |
127 | #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) |
128 | #define RT_XROUNDUP(n) RT_ROUNDUP(n) |
129 | #define PF_XROUTE PF_ROUTE |
130 | #define rt_xmsghdr rt_msghdr |
131 | #define if_xmsghdr if_msghdr |
132 | #define ifa_xmsghdr ifa_msghdr |
133 | #define if_xannouncemsghdr if_announcemsghdr |
134 | #define COMPATNAME(x) x |
135 | #define DOMAINNAME "route" |
136 | CTASSERT(sizeof(struct ifa_xmsghdr) == 32); |
137 | #ifdef COMPAT_50 |
138 | #define COMPATCALL(name, args) compat_50_ ## name args |
139 | #endif |
140 | DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ |
141 | #undef COMPAT_50 |
142 | #undef COMPAT_14 |
143 | #endif /* COMPAT_RTSOCK */ |
144 | |
145 | #ifndef COMPATCALL |
146 | #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) |
147 | #endif |
148 | |
149 | #ifdef RTSOCK_DEBUG |
150 | #define RT_IN_PRINT(info, b, a) (in_print((b), sizeof(b), \ |
151 | &((const struct sockaddr_in *)(info)->rti_info[(a)])->sin_addr), (b)) |
152 | #endif /* RTSOCK_DEBUG */ |
153 | |
154 | struct route_info COMPATNAME(route_info) = { |
155 | .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, |
156 | .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, |
157 | .ri_maxqlen = IFQ_MAXLEN, |
158 | }; |
159 | |
160 | #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) |
161 | |
162 | static void COMPATNAME(route_init)(void); |
163 | static int COMPATNAME(route_output)(struct mbuf *, struct socket *); |
164 | |
165 | static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); |
166 | static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, |
167 | struct rt_addrinfo *); |
168 | static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); |
169 | static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); |
170 | static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); |
171 | static void sysctl_net_route_setup(struct sysctllog **); |
172 | static int sysctl_dumpentry(struct rtentry *, void *); |
173 | static int sysctl_iflist(int, struct rt_walkarg *, int); |
174 | static int sysctl_rtable(SYSCTLFN_PROTO); |
175 | static void rt_adjustcount(int, int); |
176 | |
177 | static const struct protosw COMPATNAME(route_protosw)[]; |
178 | |
179 | static void |
180 | rt_adjustcount(int af, int cnt) |
181 | { |
182 | struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; |
183 | |
184 | cb->any_count += cnt; |
185 | |
186 | switch (af) { |
187 | case AF_INET: |
188 | cb->ip_count += cnt; |
189 | return; |
190 | #ifdef INET6 |
191 | case AF_INET6: |
192 | cb->ip6_count += cnt; |
193 | return; |
194 | #endif |
195 | case AF_MPLS: |
196 | cb->mpls_count += cnt; |
197 | return; |
198 | } |
199 | } |
200 | |
201 | static int |
202 | COMPATNAME(route_attach)(struct socket *so, int proto) |
203 | { |
204 | struct rawcb *rp; |
205 | int s, error; |
206 | |
207 | KASSERT(sotorawcb(so) == NULL); |
208 | rp = kmem_zalloc(sizeof(*rp), KM_SLEEP); |
209 | rp->rcb_len = sizeof(*rp); |
210 | so->so_pcb = rp; |
211 | |
212 | s = splsoftnet(); |
213 | if ((error = raw_attach(so, proto)) == 0) { |
214 | rt_adjustcount(rp->rcb_proto.sp_protocol, 1); |
215 | rp->rcb_laddr = &COMPATNAME(route_info).ri_src; |
216 | rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; |
217 | } |
218 | splx(s); |
219 | |
220 | if (error) { |
221 | kmem_free(rp, sizeof(*rp)); |
222 | so->so_pcb = NULL; |
223 | return error; |
224 | } |
225 | |
226 | soisconnected(so); |
227 | so->so_options |= SO_USELOOPBACK; |
228 | KASSERT(solocked(so)); |
229 | |
230 | return error; |
231 | } |
232 | |
233 | static void |
234 | COMPATNAME(route_detach)(struct socket *so) |
235 | { |
236 | struct rawcb *rp = sotorawcb(so); |
237 | int s; |
238 | |
239 | KASSERT(rp != NULL); |
240 | KASSERT(solocked(so)); |
241 | |
242 | s = splsoftnet(); |
243 | rt_adjustcount(rp->rcb_proto.sp_protocol, -1); |
244 | raw_detach(so); |
245 | splx(s); |
246 | } |
247 | |
248 | static int |
249 | COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) |
250 | { |
251 | KASSERT(solocked(so)); |
252 | |
253 | panic("route_accept" ); |
254 | |
255 | return EOPNOTSUPP; |
256 | } |
257 | |
258 | static int |
259 | COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) |
260 | { |
261 | KASSERT(solocked(so)); |
262 | |
263 | return EOPNOTSUPP; |
264 | } |
265 | |
266 | static int |
267 | COMPATNAME(route_listen)(struct socket *so, struct lwp *l) |
268 | { |
269 | KASSERT(solocked(so)); |
270 | |
271 | return EOPNOTSUPP; |
272 | } |
273 | |
274 | static int |
275 | COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) |
276 | { |
277 | KASSERT(solocked(so)); |
278 | |
279 | return EOPNOTSUPP; |
280 | } |
281 | |
282 | static int |
283 | COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) |
284 | { |
285 | KASSERT(solocked(so)); |
286 | |
287 | return EOPNOTSUPP; |
288 | } |
289 | |
290 | static int |
291 | COMPATNAME(route_disconnect)(struct socket *so) |
292 | { |
293 | struct rawcb *rp = sotorawcb(so); |
294 | int s; |
295 | |
296 | KASSERT(solocked(so)); |
297 | KASSERT(rp != NULL); |
298 | |
299 | s = splsoftnet(); |
300 | soisdisconnected(so); |
301 | raw_disconnect(rp); |
302 | splx(s); |
303 | |
304 | return 0; |
305 | } |
306 | |
307 | static int |
308 | COMPATNAME(route_shutdown)(struct socket *so) |
309 | { |
310 | int s; |
311 | |
312 | KASSERT(solocked(so)); |
313 | |
314 | /* |
315 | * Mark the connection as being incapable of further input. |
316 | */ |
317 | s = splsoftnet(); |
318 | socantsendmore(so); |
319 | splx(s); |
320 | return 0; |
321 | } |
322 | |
323 | static int |
324 | COMPATNAME(route_abort)(struct socket *so) |
325 | { |
326 | KASSERT(solocked(so)); |
327 | |
328 | panic("route_abort" ); |
329 | |
330 | return EOPNOTSUPP; |
331 | } |
332 | |
333 | static int |
334 | COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, |
335 | struct ifnet * ifp) |
336 | { |
337 | return EOPNOTSUPP; |
338 | } |
339 | |
340 | static int |
341 | COMPATNAME(route_stat)(struct socket *so, struct stat *ub) |
342 | { |
343 | KASSERT(solocked(so)); |
344 | |
345 | return 0; |
346 | } |
347 | |
348 | static int |
349 | COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) |
350 | { |
351 | struct rawcb *rp = sotorawcb(so); |
352 | |
353 | KASSERT(solocked(so)); |
354 | KASSERT(rp != NULL); |
355 | KASSERT(nam != NULL); |
356 | |
357 | if (rp->rcb_faddr == NULL) |
358 | return ENOTCONN; |
359 | |
360 | raw_setpeeraddr(rp, nam); |
361 | return 0; |
362 | } |
363 | |
364 | static int |
365 | COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) |
366 | { |
367 | struct rawcb *rp = sotorawcb(so); |
368 | |
369 | KASSERT(solocked(so)); |
370 | KASSERT(rp != NULL); |
371 | KASSERT(nam != NULL); |
372 | |
373 | if (rp->rcb_faddr == NULL) |
374 | return ENOTCONN; |
375 | |
376 | raw_setsockaddr(rp, nam); |
377 | return 0; |
378 | } |
379 | |
380 | static int |
381 | COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) |
382 | { |
383 | KASSERT(solocked(so)); |
384 | |
385 | return EOPNOTSUPP; |
386 | } |
387 | |
388 | static int |
389 | COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) |
390 | { |
391 | KASSERT(solocked(so)); |
392 | |
393 | return EOPNOTSUPP; |
394 | } |
395 | |
396 | static int |
397 | COMPATNAME(route_send)(struct socket *so, struct mbuf *m, |
398 | struct sockaddr *nam, struct mbuf *control, struct lwp *l) |
399 | { |
400 | int error = 0; |
401 | int s; |
402 | |
403 | KASSERT(solocked(so)); |
404 | KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); |
405 | |
406 | s = splsoftnet(); |
407 | error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); |
408 | splx(s); |
409 | |
410 | return error; |
411 | } |
412 | |
413 | static int |
414 | COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, |
415 | struct mbuf *control) |
416 | { |
417 | KASSERT(solocked(so)); |
418 | |
419 | m_freem(m); |
420 | m_freem(control); |
421 | |
422 | return EOPNOTSUPP; |
423 | } |
424 | static int |
425 | COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) |
426 | { |
427 | |
428 | panic("route_purgeif" ); |
429 | |
430 | return EOPNOTSUPP; |
431 | } |
432 | |
433 | #ifdef INET |
434 | static int |
435 | route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) |
436 | { |
437 | struct rtentry *nrt; |
438 | int error; |
439 | |
440 | error = rtrequest1(RTM_GET, info, &nrt); |
441 | if (error != 0) |
442 | return error; |
443 | /* |
444 | * nrt->rt_ifp->if_index may not be correct |
445 | * due to changing to ifplo0. |
446 | */ |
447 | *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; |
448 | rtfree(nrt); |
449 | |
450 | return 0; |
451 | } |
452 | #endif /* INET */ |
453 | |
454 | static void |
455 | route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, |
456 | struct sockaddr_dl *sdl, int *flags) |
457 | { |
458 | struct llentry *la; |
459 | |
460 | KASSERT(ifp != NULL); |
461 | |
462 | IF_AFDATA_RLOCK(ifp); |
463 | switch (dst->sa_family) { |
464 | case AF_INET: |
465 | la = lla_lookup(LLTABLE(ifp), 0, dst); |
466 | break; |
467 | case AF_INET6: |
468 | la = lla_lookup(LLTABLE6(ifp), 0, dst); |
469 | break; |
470 | default: |
471 | la = NULL; |
472 | KASSERTMSG(0, "Invalid AF=%d\n" , dst->sa_family); |
473 | break; |
474 | } |
475 | IF_AFDATA_RUNLOCK(ifp); |
476 | |
477 | void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) |
478 | ? &la->ll_addr : NULL; |
479 | |
480 | a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, |
481 | NULL, 0, a, ifp->if_addrlen); |
482 | KASSERT(a != NULL); |
483 | |
484 | if (la != NULL) { |
485 | *flags = la->la_flags; |
486 | LLE_RUNLOCK(la); |
487 | } |
488 | } |
489 | |
490 | static int |
491 | route_output_report(struct rtentry *rt, struct rt_addrinfo *info, |
492 | struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) |
493 | { |
494 | int len; |
495 | struct ifnet *ifp; |
496 | |
497 | if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) |
498 | ; |
499 | else if ((ifp = rt->rt_ifp) != NULL) { |
500 | const struct ifaddr *rtifa; |
501 | info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; |
502 | /* rtifa used to be simply rt->rt_ifa. |
503 | * If rt->rt_ifa != NULL, then |
504 | * rt_get_ifa() != NULL. So this |
505 | * ought to still be safe. --dyoung |
506 | */ |
507 | rtifa = rt_get_ifa(rt); |
508 | info->rti_info[RTAX_IFA] = rtifa->ifa_addr; |
509 | #ifdef RTSOCK_DEBUG |
510 | if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { |
511 | char ibuf[INET_ADDRSTRLEN]; |
512 | char abuf[INET_ADDRSTRLEN]; |
513 | printf("%s: copying out RTAX_IFA %s " |
514 | "for info->rti_info[RTAX_DST] %s " |
515 | "ifa_getifa %p ifa_seqno %p\n" , |
516 | __func__, |
517 | RT_IN_PRINT(info, ibuf, RTAX_IFA), |
518 | RT_IN_PRINT(info, abuf, RTAX_DST), |
519 | (void *)rtifa->ifa_getifa, |
520 | rtifa->ifa_seqno); |
521 | } |
522 | #endif /* RTSOCK_DEBUG */ |
523 | if (ifp->if_flags & IFF_POINTOPOINT) |
524 | info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; |
525 | else |
526 | info->rti_info[RTAX_BRD] = NULL; |
527 | rtm->rtm_index = ifp->if_index; |
528 | } else { |
529 | info->rti_info[RTAX_IFP] = NULL; |
530 | info->rti_info[RTAX_IFA] = NULL; |
531 | } |
532 | (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); |
533 | if (len > rtm->rtm_msglen) { |
534 | struct rt_xmsghdr *old_rtm = rtm; |
535 | R_Malloc(*new_rtm, struct rt_xmsghdr *, len); |
536 | if (*new_rtm == NULL) |
537 | return ENOBUFS; |
538 | (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); |
539 | rtm = *new_rtm; |
540 | } |
541 | (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); |
542 | rtm->rtm_flags = rt->rt_flags; |
543 | rtm_setmetrics(rt, rtm); |
544 | rtm->rtm_addrs = info->rti_addrs; |
545 | |
546 | return 0; |
547 | } |
548 | |
549 | static struct ifaddr * |
550 | route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, |
551 | struct ifnet **ifp, struct psref *psref) |
552 | { |
553 | struct ifaddr *ifa = NULL; |
554 | |
555 | *ifp = NULL; |
556 | if (info.rti_info[RTAX_IFP] != NULL) { |
557 | ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); |
558 | if (ifa == NULL) |
559 | goto next; |
560 | *ifp = ifa->ifa_ifp; |
561 | if (info.rti_info[RTAX_IFA] == NULL && |
562 | info.rti_info[RTAX_GATEWAY] == NULL) |
563 | goto next; |
564 | if (info.rti_info[RTAX_IFA] == NULL) { |
565 | /* route change <dst> <gw> -ifp <if> */ |
566 | ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], |
567 | *ifp, psref); |
568 | } else { |
569 | /* route change <dst> -ifp <if> -ifa <addr> */ |
570 | ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); |
571 | if (ifa != NULL) |
572 | goto out; |
573 | ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], |
574 | *ifp, psref); |
575 | } |
576 | goto out; |
577 | } |
578 | next: |
579 | if (info.rti_info[RTAX_IFA] != NULL) { |
580 | /* route change <dst> <gw> -ifa <addr> */ |
581 | ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); |
582 | if (ifa != NULL) |
583 | goto out; |
584 | } |
585 | if (info.rti_info[RTAX_GATEWAY] != NULL) { |
586 | /* route change <dst> <gw> */ |
587 | ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), |
588 | info.rti_info[RTAX_GATEWAY], psref); |
589 | } |
590 | out: |
591 | if (ifa != NULL && *ifp == NULL) |
592 | *ifp = ifa->ifa_ifp; |
593 | return ifa; |
594 | } |
595 | |
596 | static int |
597 | route_output_change(struct rtentry *rt, struct rt_addrinfo *info, |
598 | struct rt_xmsghdr *rtm) |
599 | { |
600 | int error = 0; |
601 | struct ifnet *ifp, *new_ifp; |
602 | struct ifaddr *ifa, *new_ifa; |
603 | struct psref psref_ifa, psref_new_ifa, psref_ifp; |
604 | |
605 | /* |
606 | * new gateway could require new ifaddr, ifp; |
607 | * flags may also be different; ifp may be specified |
608 | * by ll sockaddr when protocol address is ambiguous |
609 | */ |
610 | ifp = rt_getifp(info, &psref_ifp); |
611 | ifa = rt_getifa(info, &psref_ifa); |
612 | if (ifa == NULL) { |
613 | error = ENETUNREACH; |
614 | goto out; |
615 | } |
616 | if (info->rti_info[RTAX_GATEWAY]) { |
617 | error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); |
618 | if (error != 0) |
619 | goto out; |
620 | } |
621 | if (info->rti_info[RTAX_TAG]) { |
622 | const struct sockaddr *tag; |
623 | tag = rt_settag(rt, info->rti_info[RTAX_TAG]); |
624 | if (tag == NULL) { |
625 | error = ENOBUFS; |
626 | goto out; |
627 | } |
628 | } |
629 | /* new gateway could require new ifaddr, ifp; |
630 | flags may also be different; ifp may be specified |
631 | by ll sockaddr when protocol address is ambiguous */ |
632 | new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifa); |
633 | if (new_ifa != NULL) { |
634 | ifa_release(ifa, &psref_ifa); |
635 | ifa = new_ifa; |
636 | } |
637 | if (ifa) { |
638 | struct ifaddr *oifa = rt->rt_ifa; |
639 | if (oifa != ifa) { |
640 | if (oifa && oifa->ifa_rtrequest) |
641 | oifa->ifa_rtrequest(RTM_DELETE, rt, info); |
642 | rt_replace_ifa(rt, ifa); |
643 | rt->rt_ifp = new_ifp; |
644 | } |
645 | if (new_ifa == NULL) |
646 | ifa_release(ifa, &psref_ifa); |
647 | } |
648 | ifa_release(new_ifa, &psref_new_ifa); |
649 | if (new_ifp && rt->rt_ifp != new_ifp) |
650 | rt->rt_ifp = new_ifp; |
651 | rt_setmetrics(rtm->rtm_inits, rtm, rt); |
652 | if (rt->rt_flags != info->rti_flags) |
653 | rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) |
654 | | (rt->rt_flags & PRESERVED_RTF); |
655 | if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) |
656 | rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); |
657 | out: |
658 | if_put(ifp, &psref_ifp); |
659 | |
660 | return error; |
661 | } |
662 | |
663 | /*ARGSUSED*/ |
664 | int |
665 | COMPATNAME(route_output)(struct mbuf *m, struct socket *so) |
666 | { |
667 | struct sockproto proto = { .sp_family = PF_XROUTE, }; |
668 | struct rt_xmsghdr *rtm = NULL; |
669 | struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; |
670 | struct rtentry *rt = NULL; |
671 | struct rtentry *saved_nrt = NULL; |
672 | struct rt_addrinfo info; |
673 | int len, error = 0; |
674 | sa_family_t family; |
675 | struct sockaddr_dl sdl; |
676 | int bound = curlwp_bind(); |
677 | |
678 | #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) |
679 | if (m == NULL || ((m->m_len < sizeof(int32_t)) && |
680 | (m = m_pullup(m, sizeof(int32_t))) == NULL)) { |
681 | error = ENOBUFS; |
682 | goto out; |
683 | } |
684 | if ((m->m_flags & M_PKTHDR) == 0) |
685 | panic("%s" , __func__); |
686 | len = m->m_pkthdr.len; |
687 | if (len < sizeof(*rtm) || |
688 | len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { |
689 | info.rti_info[RTAX_DST] = NULL; |
690 | senderr(EINVAL); |
691 | } |
692 | R_Malloc(rtm, struct rt_xmsghdr *, len); |
693 | if (rtm == NULL) { |
694 | info.rti_info[RTAX_DST] = NULL; |
695 | senderr(ENOBUFS); |
696 | } |
697 | m_copydata(m, 0, len, rtm); |
698 | if (rtm->rtm_version != RTM_XVERSION) { |
699 | info.rti_info[RTAX_DST] = NULL; |
700 | senderr(EPROTONOSUPPORT); |
701 | } |
702 | rtm->rtm_pid = curproc->p_pid; |
703 | memset(&info, 0, sizeof(info)); |
704 | info.rti_addrs = rtm->rtm_addrs; |
705 | if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, |
706 | &info)) { |
707 | senderr(EINVAL); |
708 | } |
709 | info.rti_flags = rtm->rtm_flags; |
710 | #ifdef RTSOCK_DEBUG |
711 | if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { |
712 | char abuf[INET_ADDRSTRLEN]; |
713 | printf("%s: extracted info.rti_info[RTAX_DST] %s\n" , __func__, |
714 | RT_IN_PRINT(&info, abuf, RTAX_DST)); |
715 | } |
716 | #endif /* RTSOCK_DEBUG */ |
717 | if (info.rti_info[RTAX_DST] == NULL || |
718 | (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { |
719 | senderr(EINVAL); |
720 | } |
721 | if (info.rti_info[RTAX_GATEWAY] != NULL && |
722 | (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { |
723 | senderr(EINVAL); |
724 | } |
725 | |
726 | /* |
727 | * Verify that the caller has the appropriate privilege; RTM_GET |
728 | * is the only operation the non-superuser is allowed. |
729 | */ |
730 | if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, |
731 | 0, rtm, NULL, NULL) != 0) |
732 | senderr(EACCES); |
733 | |
734 | switch (rtm->rtm_type) { |
735 | |
736 | case RTM_ADD: |
737 | if (info.rti_info[RTAX_GATEWAY] == NULL) { |
738 | senderr(EINVAL); |
739 | } |
740 | #ifdef INET |
741 | /* support for new ARP code with keeping backcompat */ |
742 | if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { |
743 | const struct sockaddr_dl *sdlp = |
744 | satocsdl(info.rti_info[RTAX_GATEWAY]); |
745 | |
746 | /* Allow routing requests by interface index */ |
747 | if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 |
748 | && sdlp->sdl_slen == 0) |
749 | goto fallback; |
750 | /* |
751 | * Old arp binaries don't set the sdl_index |
752 | * so we have to complement it. |
753 | */ |
754 | int sdl_index = sdlp->sdl_index; |
755 | if (sdl_index == 0) { |
756 | error = route_get_sdl_index(&info, &sdl_index); |
757 | if (error != 0) |
758 | goto fallback; |
759 | } else if ( |
760 | info.rti_info[RTAX_DST]->sa_family == AF_INET) { |
761 | /* |
762 | * XXX workaround for SIN_PROXY case; proxy arp |
763 | * entry should be in an interface that has |
764 | * a network route including the destination, |
765 | * not a local (link) route that may not be a |
766 | * desired place, for example a tap. |
767 | */ |
768 | const struct sockaddr_inarp *sina = |
769 | (const struct sockaddr_inarp *) |
770 | info.rti_info[RTAX_DST]; |
771 | if (sina->sin_other & SIN_PROXY) { |
772 | error = route_get_sdl_index(&info, |
773 | &sdl_index); |
774 | if (error != 0) |
775 | goto fallback; |
776 | } |
777 | } |
778 | error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, |
779 | rtm->rtm_rmx.rmx_expire, &info, sdl_index); |
780 | break; |
781 | } |
782 | fallback: |
783 | #endif /* INET */ |
784 | error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); |
785 | if (error == 0) { |
786 | rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); |
787 | rtfree(saved_nrt); |
788 | } |
789 | break; |
790 | |
791 | case RTM_DELETE: |
792 | #ifdef INET |
793 | /* support for new ARP code */ |
794 | if (info.rti_info[RTAX_GATEWAY] && |
795 | (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && |
796 | (rtm->rtm_flags & RTF_LLDATA) != 0) { |
797 | error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, |
798 | rtm->rtm_rmx.rmx_expire, &info, 0); |
799 | break; |
800 | } |
801 | #endif /* INET */ |
802 | error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); |
803 | if (error != 0) |
804 | break; |
805 | |
806 | rt = saved_nrt; |
807 | info.rti_info[RTAX_DST] = rt_getkey(rt); |
808 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
809 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
810 | info.rti_info[RTAX_TAG] = rt_gettag(rt); |
811 | error = route_output_report(rt, &info, rtm, &new_rtm); |
812 | if (error) |
813 | senderr(error); |
814 | if (new_rtm != NULL) { |
815 | old_rtm = rtm; |
816 | rtm = new_rtm; |
817 | } |
818 | break; |
819 | |
820 | case RTM_GET: |
821 | case RTM_CHANGE: |
822 | case RTM_LOCK: |
823 | /* XXX This will mask info.rti_info[RTAX_DST] with |
824 | * info.rti_info[RTAX_NETMASK] before |
825 | * searching. It did not used to do that. --dyoung |
826 | */ |
827 | rt = NULL; |
828 | error = rtrequest1(RTM_GET, &info, &rt); |
829 | if (error != 0) |
830 | senderr(error); |
831 | if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ |
832 | if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), |
833 | info.rti_info[RTAX_DST]->sa_len) != 0) |
834 | senderr(ESRCH); |
835 | if (info.rti_info[RTAX_NETMASK] == NULL && |
836 | rt_mask(rt) != NULL) |
837 | senderr(ETOOMANYREFS); |
838 | } |
839 | |
840 | /* |
841 | * XXX if arp/ndp requests an L2 entry, we have to obtain |
842 | * it from lltable while for the route command we have to |
843 | * return a route as it is. How to distinguish them? |
844 | * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp |
845 | * indicates an L2 entry is requested. For old arp/ndp |
846 | * binaries, we check RTF_UP flag is NOT set; it works |
847 | * by the fact that arp/ndp don't set it while the route |
848 | * command sets it. |
849 | */ |
850 | if (((rtm->rtm_flags & RTF_LLDATA) != 0 || |
851 | (rtm->rtm_flags & RTF_UP) == 0) && |
852 | rtm->rtm_type == RTM_GET && |
853 | sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { |
854 | int ll_flags = 0; |
855 | route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, |
856 | &ll_flags); |
857 | info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); |
858 | error = route_output_report(rt, &info, rtm, &new_rtm); |
859 | if (error) |
860 | senderr(error); |
861 | if (new_rtm != NULL) { |
862 | old_rtm = rtm; |
863 | rtm = new_rtm; |
864 | } |
865 | rtm->rtm_flags |= RTF_LLDATA; |
866 | rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; |
867 | break; |
868 | } |
869 | |
870 | switch (rtm->rtm_type) { |
871 | case RTM_GET: |
872 | info.rti_info[RTAX_DST] = rt_getkey(rt); |
873 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
874 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
875 | info.rti_info[RTAX_TAG] = rt_gettag(rt); |
876 | error = route_output_report(rt, &info, rtm, &new_rtm); |
877 | if (error) |
878 | senderr(error); |
879 | if (new_rtm != NULL) { |
880 | old_rtm = rtm; |
881 | rtm = new_rtm; |
882 | } |
883 | break; |
884 | |
885 | case RTM_CHANGE: |
886 | error = route_output_change(rt, &info, rtm); |
887 | if (error != 0) |
888 | goto flush; |
889 | /*FALLTHROUGH*/ |
890 | case RTM_LOCK: |
891 | rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); |
892 | rt->rt_rmx.rmx_locks |= |
893 | (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); |
894 | break; |
895 | } |
896 | break; |
897 | |
898 | default: |
899 | senderr(EOPNOTSUPP); |
900 | } |
901 | |
902 | flush: |
903 | if (rtm) { |
904 | if (error) |
905 | rtm->rtm_errno = error; |
906 | else |
907 | rtm->rtm_flags |= RTF_DONE; |
908 | } |
909 | family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : |
910 | 0; |
911 | /* We cannot free old_rtm until we have stopped using the |
912 | * pointers in info, some of which may point to sockaddrs |
913 | * in old_rtm. |
914 | */ |
915 | if (old_rtm != NULL) |
916 | Free(old_rtm); |
917 | if (rt) |
918 | rtfree(rt); |
919 | { |
920 | struct rawcb *rp = NULL; |
921 | /* |
922 | * Check to see if we don't want our own messages. |
923 | */ |
924 | if ((so->so_options & SO_USELOOPBACK) == 0) { |
925 | if (COMPATNAME(route_info).ri_cb.any_count <= 1) { |
926 | if (rtm) |
927 | Free(rtm); |
928 | m_freem(m); |
929 | goto out; |
930 | } |
931 | /* There is another listener, so construct message */ |
932 | rp = sotorawcb(so); |
933 | } |
934 | if (rtm) { |
935 | m_copyback(m, 0, rtm->rtm_msglen, rtm); |
936 | if (m->m_pkthdr.len < rtm->rtm_msglen) { |
937 | m_freem(m); |
938 | m = NULL; |
939 | } else if (m->m_pkthdr.len > rtm->rtm_msglen) |
940 | m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); |
941 | Free(rtm); |
942 | } |
943 | if (rp) |
944 | rp->rcb_proto.sp_family = 0; /* Avoid us */ |
945 | if (family) |
946 | proto.sp_protocol = family; |
947 | if (m) |
948 | raw_input(m, &proto, &COMPATNAME(route_info).ri_src, |
949 | &COMPATNAME(route_info).ri_dst); |
950 | if (rp) |
951 | rp->rcb_proto.sp_family = PF_XROUTE; |
952 | } |
953 | out: |
954 | curlwp_bindx(bound); |
955 | return error; |
956 | } |
957 | |
958 | static void |
959 | rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) |
960 | { |
961 | #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; |
962 | metric(RTV_RPIPE, rmx_recvpipe); |
963 | metric(RTV_SPIPE, rmx_sendpipe); |
964 | metric(RTV_SSTHRESH, rmx_ssthresh); |
965 | metric(RTV_RTT, rmx_rtt); |
966 | metric(RTV_RTTVAR, rmx_rttvar); |
967 | metric(RTV_HOPCOUNT, rmx_hopcount); |
968 | metric(RTV_MTU, rmx_mtu); |
969 | #undef metric |
970 | if (which & RTV_EXPIRE) { |
971 | out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? |
972 | time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; |
973 | } |
974 | } |
975 | |
976 | static void |
977 | rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) |
978 | { |
979 | #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; |
980 | metric(rmx_recvpipe); |
981 | metric(rmx_sendpipe); |
982 | metric(rmx_ssthresh); |
983 | metric(rmx_rtt); |
984 | metric(rmx_rttvar); |
985 | metric(rmx_hopcount); |
986 | metric(rmx_mtu); |
987 | #undef metric |
988 | out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? |
989 | time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; |
990 | } |
991 | |
992 | static int |
993 | rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, |
994 | struct rt_addrinfo *rtinfo) |
995 | { |
996 | const struct sockaddr *sa = NULL; /* Quell compiler warning */ |
997 | int i; |
998 | |
999 | for (i = 0; i < RTAX_MAX && cp < cplim; i++) { |
1000 | if ((rtinfo->rti_addrs & (1 << i)) == 0) |
1001 | continue; |
1002 | rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; |
1003 | RT_XADVANCE(cp, sa); |
1004 | } |
1005 | |
1006 | /* |
1007 | * Check for extra addresses specified, except RTM_GET asking |
1008 | * for interface info. |
1009 | */ |
1010 | if (rtmtype == RTM_GET) { |
1011 | if (((rtinfo->rti_addrs & |
1012 | (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) |
1013 | return 1; |
1014 | } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) |
1015 | return 1; |
1016 | /* Check for bad data length. */ |
1017 | if (cp != cplim) { |
1018 | if (i == RTAX_NETMASK + 1 && sa != NULL && |
1019 | cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) |
1020 | /* |
1021 | * The last sockaddr was info.rti_info[RTAX_NETMASK]. |
1022 | * We accept this for now for the sake of old |
1023 | * binaries or third party softwares. |
1024 | */ |
1025 | ; |
1026 | else |
1027 | return 1; |
1028 | } |
1029 | return 0; |
1030 | } |
1031 | |
1032 | static int |
1033 | rt_getlen(int type) |
1034 | { |
1035 | #ifndef COMPAT_RTSOCK |
1036 | CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); |
1037 | CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); |
1038 | CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); |
1039 | CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); |
1040 | #endif |
1041 | |
1042 | switch (type) { |
1043 | case RTM_ODELADDR: |
1044 | case RTM_ONEWADDR: |
1045 | case RTM_OCHGADDR: |
1046 | #ifdef COMPAT_70 |
1047 | return sizeof(struct ifa_msghdr70); |
1048 | #else |
1049 | #ifdef DIAGNOSTIC |
1050 | printf("RTM_ONEWADDR\n" ); |
1051 | #endif |
1052 | return -1; |
1053 | #endif |
1054 | case RTM_DELADDR: |
1055 | case RTM_NEWADDR: |
1056 | case RTM_CHGADDR: |
1057 | return sizeof(struct ifa_xmsghdr); |
1058 | |
1059 | case RTM_OOIFINFO: |
1060 | #ifdef COMPAT_14 |
1061 | return sizeof(struct if_msghdr14); |
1062 | #else |
1063 | #ifdef DIAGNOSTIC |
1064 | printf("RTM_OOIFINFO\n" ); |
1065 | #endif |
1066 | return -1; |
1067 | #endif |
1068 | case RTM_OIFINFO: |
1069 | #ifdef COMPAT_50 |
1070 | return sizeof(struct if_msghdr50); |
1071 | #else |
1072 | #ifdef DIAGNOSTIC |
1073 | printf("RTM_OIFINFO\n" ); |
1074 | #endif |
1075 | return -1; |
1076 | #endif |
1077 | |
1078 | case RTM_IFINFO: |
1079 | return sizeof(struct if_xmsghdr); |
1080 | |
1081 | case RTM_IFANNOUNCE: |
1082 | case RTM_IEEE80211: |
1083 | return sizeof(struct if_xannouncemsghdr); |
1084 | |
1085 | default: |
1086 | return sizeof(struct rt_xmsghdr); |
1087 | } |
1088 | } |
1089 | |
1090 | |
1091 | struct mbuf * |
1092 | COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) |
1093 | { |
1094 | struct rt_xmsghdr *rtm; |
1095 | struct mbuf *m; |
1096 | int i; |
1097 | const struct sockaddr *sa; |
1098 | int len, dlen; |
1099 | |
1100 | m = m_gethdr(M_DONTWAIT, MT_DATA); |
1101 | if (m == NULL) |
1102 | return m; |
1103 | MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); |
1104 | |
1105 | if ((len = rt_getlen(type)) == -1) |
1106 | goto out; |
1107 | if (len > MHLEN + MLEN) |
1108 | panic("%s: message too long" , __func__); |
1109 | else if (len > MHLEN) { |
1110 | m->m_next = m_get(M_DONTWAIT, MT_DATA); |
1111 | if (m->m_next == NULL) |
1112 | goto out; |
1113 | MCLAIM(m->m_next, m->m_owner); |
1114 | m->m_pkthdr.len = len; |
1115 | m->m_len = MHLEN; |
1116 | m->m_next->m_len = len - MHLEN; |
1117 | } else { |
1118 | m->m_pkthdr.len = m->m_len = len; |
1119 | } |
1120 | m_reset_rcvif(m); |
1121 | m_copyback(m, 0, datalen, data); |
1122 | if (len > datalen) |
1123 | (void)memset(mtod(m, char *) + datalen, 0, len - datalen); |
1124 | rtm = mtod(m, struct rt_xmsghdr *); |
1125 | for (i = 0; i < RTAX_MAX; i++) { |
1126 | if ((sa = rtinfo->rti_info[i]) == NULL) |
1127 | continue; |
1128 | rtinfo->rti_addrs |= (1 << i); |
1129 | dlen = RT_XROUNDUP(sa->sa_len); |
1130 | m_copyback(m, len, sa->sa_len, sa); |
1131 | if (dlen != sa->sa_len) { |
1132 | /* |
1133 | * Up to 6 + 1 nul's since roundup is to |
1134 | * sizeof(uint64_t) (8 bytes) |
1135 | */ |
1136 | m_copyback(m, len + sa->sa_len, |
1137 | dlen - sa->sa_len, "\0\0\0\0\0\0" ); |
1138 | } |
1139 | len += dlen; |
1140 | } |
1141 | if (m->m_pkthdr.len != len) |
1142 | goto out; |
1143 | rtm->rtm_msglen = len; |
1144 | rtm->rtm_version = RTM_XVERSION; |
1145 | rtm->rtm_type = type; |
1146 | return m; |
1147 | out: |
1148 | m_freem(m); |
1149 | return NULL; |
1150 | } |
1151 | |
1152 | /* |
1153 | * rt_msg2 |
1154 | * |
1155 | * fills 'cp' or 'w'.w_tmem with the routing socket message and |
1156 | * returns the length of the message in 'lenp'. |
1157 | * |
1158 | * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold |
1159 | * the message |
1160 | * otherwise walkarg's w_needed is updated and if the user buffer is |
1161 | * specified and w_needed indicates space exists the information is copied |
1162 | * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, |
1163 | * if the allocation fails ENOBUFS is returned. |
1164 | */ |
1165 | static int |
1166 | rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, |
1167 | int *lenp) |
1168 | { |
1169 | int i; |
1170 | int len, dlen, second_time = 0; |
1171 | char *cp0, *cp = cpv; |
1172 | |
1173 | rtinfo->rti_addrs = 0; |
1174 | again: |
1175 | if ((len = rt_getlen(type)) == -1) |
1176 | return EINVAL; |
1177 | |
1178 | if ((cp0 = cp) != NULL) |
1179 | cp += len; |
1180 | for (i = 0; i < RTAX_MAX; i++) { |
1181 | const struct sockaddr *sa; |
1182 | |
1183 | if ((sa = rtinfo->rti_info[i]) == NULL) |
1184 | continue; |
1185 | rtinfo->rti_addrs |= (1 << i); |
1186 | dlen = RT_XROUNDUP(sa->sa_len); |
1187 | if (cp) { |
1188 | int diff = dlen - sa->sa_len; |
1189 | (void)memcpy(cp, sa, (size_t)sa->sa_len); |
1190 | cp += sa->sa_len; |
1191 | if (diff > 0) { |
1192 | (void)memset(cp, 0, (size_t)diff); |
1193 | cp += diff; |
1194 | } |
1195 | } |
1196 | len += dlen; |
1197 | } |
1198 | if (cp == NULL && w != NULL && !second_time) { |
1199 | struct rt_walkarg *rw = w; |
1200 | |
1201 | rw->w_needed += len; |
1202 | if (rw->w_needed <= 0 && rw->w_where) { |
1203 | if (rw->w_tmemsize < len) { |
1204 | if (rw->w_tmem) |
1205 | free(rw->w_tmem, M_RTABLE); |
1206 | rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); |
1207 | if (rw->w_tmem) |
1208 | rw->w_tmemsize = len; |
1209 | else |
1210 | rw->w_tmemsize = 0; |
1211 | } |
1212 | if (rw->w_tmem) { |
1213 | cp = rw->w_tmem; |
1214 | second_time = 1; |
1215 | goto again; |
1216 | } else { |
1217 | rw->w_tmemneeded = len; |
1218 | return ENOBUFS; |
1219 | } |
1220 | } |
1221 | } |
1222 | if (cp) { |
1223 | struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; |
1224 | |
1225 | rtm->rtm_version = RTM_XVERSION; |
1226 | rtm->rtm_type = type; |
1227 | rtm->rtm_msglen = len; |
1228 | } |
1229 | if (lenp) |
1230 | *lenp = len; |
1231 | return 0; |
1232 | } |
1233 | |
1234 | #ifndef COMPAT_RTSOCK |
1235 | int |
1236 | rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, |
1237 | int *lenp) |
1238 | { |
1239 | return rt_msg2(type, rtinfo, cpv, w, lenp); |
1240 | } |
1241 | #endif |
1242 | |
1243 | /* |
1244 | * This routine is called to generate a message from the routing |
1245 | * socket indicating that a redirect has occurred, a routing lookup |
1246 | * has failed, or that a protocol has detected timeouts to a particular |
1247 | * destination. |
1248 | */ |
1249 | void |
1250 | COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, |
1251 | int error) |
1252 | { |
1253 | struct rt_xmsghdr rtm; |
1254 | struct mbuf *m; |
1255 | const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; |
1256 | struct rt_addrinfo info = *rtinfo; |
1257 | |
1258 | COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); |
1259 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
1260 | return; |
1261 | memset(&rtm, 0, sizeof(rtm)); |
1262 | rtm.rtm_pid = curproc->p_pid; |
1263 | rtm.rtm_flags = RTF_DONE | flags; |
1264 | rtm.rtm_errno = error; |
1265 | m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); |
1266 | if (m == NULL) |
1267 | return; |
1268 | mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; |
1269 | COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); |
1270 | } |
1271 | |
1272 | /* |
1273 | * This routine is called to generate a message from the routing |
1274 | * socket indicating that the status of a network interface has changed. |
1275 | */ |
1276 | void |
1277 | COMPATNAME(rt_ifmsg)(struct ifnet *ifp) |
1278 | { |
1279 | struct if_xmsghdr ifm; |
1280 | struct mbuf *m; |
1281 | struct rt_addrinfo info; |
1282 | |
1283 | COMPATCALL(rt_ifmsg, (ifp)); |
1284 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
1285 | return; |
1286 | (void)memset(&info, 0, sizeof(info)); |
1287 | (void)memset(&ifm, 0, sizeof(ifm)); |
1288 | ifm.ifm_index = ifp->if_index; |
1289 | ifm.ifm_flags = ifp->if_flags; |
1290 | ifm.ifm_data = ifp->if_data; |
1291 | ifm.ifm_addrs = 0; |
1292 | m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); |
1293 | if (m == NULL) |
1294 | return; |
1295 | COMPATNAME(route_enqueue)(m, 0); |
1296 | #ifdef COMPAT_14 |
1297 | compat_14_rt_oifmsg(ifp); |
1298 | #endif |
1299 | #ifdef COMPAT_50 |
1300 | compat_50_rt_oifmsg(ifp); |
1301 | #endif |
1302 | } |
1303 | |
1304 | #ifndef COMPAT_RTSOCK |
1305 | static int |
1306 | if_addrflags(struct ifaddr *ifa) |
1307 | { |
1308 | |
1309 | switch (ifa->ifa_addr->sa_family) { |
1310 | #ifdef INET |
1311 | case AF_INET: |
1312 | return ((struct in_ifaddr *)ifa)->ia4_flags; |
1313 | #endif |
1314 | #ifdef INET6 |
1315 | case AF_INET6: |
1316 | return ((struct in6_ifaddr *)ifa)->ia6_flags; |
1317 | #endif |
1318 | default: |
1319 | return 0; |
1320 | } |
1321 | } |
1322 | #endif |
1323 | |
1324 | /* |
1325 | * This is called to generate messages from the routing socket |
1326 | * indicating a network interface has had addresses associated with it. |
1327 | * if we ever reverse the logic and replace messages TO the routing |
1328 | * socket indicate a request to configure interfaces, then it will |
1329 | * be unnecessary as the routing socket will automatically generate |
1330 | * copies of it. |
1331 | */ |
1332 | void |
1333 | COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, |
1334 | struct rtentry *rt) |
1335 | { |
1336 | #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) |
1337 | struct rt_addrinfo info; |
1338 | const struct sockaddr *sa; |
1339 | int pass; |
1340 | struct mbuf *m; |
1341 | struct ifnet *ifp; |
1342 | struct rt_xmsghdr rtm; |
1343 | struct ifa_xmsghdr ifam; |
1344 | int ncmd; |
1345 | |
1346 | KASSERT(ifa != NULL); |
1347 | KASSERT(ifa->ifa_addr != NULL); |
1348 | ifp = ifa->ifa_ifp; |
1349 | #ifdef SCTP |
1350 | if (cmd == RTM_ADD) { |
1351 | sctp_add_ip_address(ifa); |
1352 | } else if (cmd == RTM_DELETE) { |
1353 | sctp_delete_ip_address(ifa); |
1354 | } |
1355 | #endif |
1356 | |
1357 | COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); |
1358 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
1359 | return; |
1360 | for (pass = 1; pass < 3; pass++) { |
1361 | memset(&info, 0, sizeof(info)); |
1362 | switch (cmdpass(cmd, pass)) { |
1363 | case cmdpass(RTM_ADD, 1): |
1364 | case cmdpass(RTM_CHANGE, 1): |
1365 | case cmdpass(RTM_DELETE, 2): |
1366 | case cmdpass(RTM_NEWADDR, 1): |
1367 | case cmdpass(RTM_DELADDR, 1): |
1368 | case cmdpass(RTM_CHGADDR, 1): |
1369 | switch (cmd) { |
1370 | case RTM_ADD: |
1371 | ncmd = RTM_XNEWADDR; |
1372 | break; |
1373 | case RTM_DELETE: |
1374 | ncmd = RTM_XDELADDR; |
1375 | break; |
1376 | case RTM_CHANGE: |
1377 | ncmd = RTM_XCHGADDR; |
1378 | break; |
1379 | case RTM_NEWADDR: |
1380 | ncmd = RTM_XNEWADDR; |
1381 | break; |
1382 | case RTM_DELADDR: |
1383 | ncmd = RTM_XDELADDR; |
1384 | break; |
1385 | case RTM_CHGADDR: |
1386 | ncmd = RTM_XCHGADDR; |
1387 | break; |
1388 | default: |
1389 | panic("%s: unknown command %d" , __func__, cmd); |
1390 | } |
1391 | #ifdef COMPAT_70 |
1392 | compat_70_rt_newaddrmsg1(ncmd, ifa); |
1393 | #endif |
1394 | info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; |
1395 | KASSERT(ifp->if_dl != NULL); |
1396 | info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; |
1397 | info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; |
1398 | info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; |
1399 | memset(&ifam, 0, sizeof(ifam)); |
1400 | ifam.ifam_index = ifp->if_index; |
1401 | ifam.ifam_metric = ifa->ifa_metric; |
1402 | ifam.ifam_flags = ifa->ifa_flags; |
1403 | #ifndef COMPAT_RTSOCK |
1404 | ifam.ifam_pid = curproc->p_pid; |
1405 | ifam.ifam_addrflags = if_addrflags(ifa); |
1406 | #endif |
1407 | m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); |
1408 | if (m == NULL) |
1409 | continue; |
1410 | mtod(m, struct ifa_xmsghdr *)->ifam_addrs = |
1411 | info.rti_addrs; |
1412 | break; |
1413 | case cmdpass(RTM_ADD, 2): |
1414 | case cmdpass(RTM_CHANGE, 2): |
1415 | case cmdpass(RTM_DELETE, 1): |
1416 | if (rt == NULL) |
1417 | continue; |
1418 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
1419 | info.rti_info[RTAX_DST] = sa = rt_getkey(rt); |
1420 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
1421 | memset(&rtm, 0, sizeof(rtm)); |
1422 | rtm.rtm_pid = curproc->p_pid; |
1423 | rtm.rtm_index = ifp->if_index; |
1424 | rtm.rtm_flags |= rt->rt_flags; |
1425 | rtm.rtm_errno = error; |
1426 | m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); |
1427 | if (m == NULL) |
1428 | continue; |
1429 | mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; |
1430 | break; |
1431 | default: |
1432 | continue; |
1433 | } |
1434 | #ifdef DIAGNOSTIC |
1435 | if (m == NULL) |
1436 | panic("%s: called with wrong command" , __func__); |
1437 | #endif |
1438 | COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); |
1439 | } |
1440 | #undef cmdpass |
1441 | |
1442 | } |
1443 | |
1444 | static struct mbuf * |
1445 | rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, |
1446 | struct rt_addrinfo *info) |
1447 | { |
1448 | struct if_xannouncemsghdr ifan; |
1449 | |
1450 | memset(info, 0, sizeof(*info)); |
1451 | memset(&ifan, 0, sizeof(ifan)); |
1452 | ifan.ifan_index = ifp->if_index; |
1453 | strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); |
1454 | ifan.ifan_what = what; |
1455 | return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); |
1456 | } |
1457 | |
1458 | /* |
1459 | * This is called to generate routing socket messages indicating |
1460 | * network interface arrival and departure. |
1461 | */ |
1462 | void |
1463 | COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) |
1464 | { |
1465 | struct mbuf *m; |
1466 | struct rt_addrinfo info; |
1467 | |
1468 | COMPATCALL(rt_ifannouncemsg, (ifp, what)); |
1469 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
1470 | return; |
1471 | m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); |
1472 | if (m == NULL) |
1473 | return; |
1474 | COMPATNAME(route_enqueue)(m, 0); |
1475 | } |
1476 | |
1477 | /* |
1478 | * This is called to generate routing socket messages indicating |
1479 | * IEEE80211 wireless events. |
1480 | * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. |
1481 | */ |
1482 | void |
1483 | COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, |
1484 | size_t data_len) |
1485 | { |
1486 | struct mbuf *m; |
1487 | struct rt_addrinfo info; |
1488 | |
1489 | COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); |
1490 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
1491 | return; |
1492 | m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); |
1493 | if (m == NULL) |
1494 | return; |
1495 | /* |
1496 | * Append the ieee80211 data. Try to stick it in the |
1497 | * mbuf containing the ifannounce msg; otherwise allocate |
1498 | * a new mbuf and append. |
1499 | * |
1500 | * NB: we assume m is a single mbuf. |
1501 | */ |
1502 | if (data_len > M_TRAILINGSPACE(m)) { |
1503 | struct mbuf *n = m_get(M_NOWAIT, MT_DATA); |
1504 | if (n == NULL) { |
1505 | m_freem(m); |
1506 | return; |
1507 | } |
1508 | (void)memcpy(mtod(n, void *), data, data_len); |
1509 | n->m_len = data_len; |
1510 | m->m_next = n; |
1511 | } else if (data_len > 0) { |
1512 | (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); |
1513 | m->m_len += data_len; |
1514 | } |
1515 | if (m->m_flags & M_PKTHDR) |
1516 | m->m_pkthdr.len += data_len; |
1517 | mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; |
1518 | COMPATNAME(route_enqueue)(m, 0); |
1519 | } |
1520 | |
1521 | /* |
1522 | * This is used in dumping the kernel table via sysctl(). |
1523 | */ |
1524 | static int |
1525 | sysctl_dumpentry(struct rtentry *rt, void *v) |
1526 | { |
1527 | struct rt_walkarg *w = v; |
1528 | int error = 0, size; |
1529 | struct rt_addrinfo info; |
1530 | |
1531 | if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) |
1532 | return 0; |
1533 | memset(&info, 0, sizeof(info)); |
1534 | info.rti_info[RTAX_DST] = rt_getkey(rt); |
1535 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
1536 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
1537 | info.rti_info[RTAX_TAG] = rt_gettag(rt); |
1538 | if (rt->rt_ifp) { |
1539 | const struct ifaddr *rtifa; |
1540 | info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; |
1541 | /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, |
1542 | * then rt_get_ifa() != NULL. So this ought to still be safe. |
1543 | * --dyoung |
1544 | */ |
1545 | rtifa = rt_get_ifa(rt); |
1546 | info.rti_info[RTAX_IFA] = rtifa->ifa_addr; |
1547 | if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) |
1548 | info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; |
1549 | } |
1550 | if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) |
1551 | return error; |
1552 | if (w->w_where && w->w_tmem && w->w_needed <= 0) { |
1553 | struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; |
1554 | |
1555 | rtm->rtm_flags = rt->rt_flags; |
1556 | rtm->rtm_use = rt->rt_use; |
1557 | rtm_setmetrics(rt, rtm); |
1558 | KASSERT(rt->rt_ifp != NULL); |
1559 | rtm->rtm_index = rt->rt_ifp->if_index; |
1560 | rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; |
1561 | rtm->rtm_addrs = info.rti_addrs; |
1562 | if ((error = copyout(rtm, w->w_where, size)) != 0) |
1563 | w->w_where = NULL; |
1564 | else |
1565 | w->w_where = (char *)w->w_where + size; |
1566 | } |
1567 | return error; |
1568 | } |
1569 | |
1570 | static int |
1571 | sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, |
1572 | struct rt_addrinfo *info, size_t len) |
1573 | { |
1574 | struct if_xmsghdr *ifm; |
1575 | int error; |
1576 | |
1577 | ifm = (struct if_xmsghdr *)w->w_tmem; |
1578 | ifm->ifm_index = ifp->if_index; |
1579 | ifm->ifm_flags = ifp->if_flags; |
1580 | ifm->ifm_data = ifp->if_data; |
1581 | ifm->ifm_addrs = info->rti_addrs; |
1582 | if ((error = copyout(ifm, w->w_where, len)) == 0) |
1583 | w->w_where = (char *)w->w_where + len; |
1584 | return error; |
1585 | } |
1586 | |
1587 | static int |
1588 | sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, |
1589 | struct rt_addrinfo *info) |
1590 | { |
1591 | int len, error; |
1592 | |
1593 | if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) |
1594 | return error; |
1595 | if (w->w_where && w->w_tmem && w->w_needed <= 0) { |
1596 | struct ifa_xmsghdr *ifam; |
1597 | |
1598 | ifam = (struct ifa_xmsghdr *)w->w_tmem; |
1599 | ifam->ifam_index = ifa->ifa_ifp->if_index; |
1600 | ifam->ifam_flags = ifa->ifa_flags; |
1601 | ifam->ifam_metric = ifa->ifa_metric; |
1602 | ifam->ifam_addrs = info->rti_addrs; |
1603 | #ifndef COMPAT_RTSOCK |
1604 | ifam->ifam_pid = 0; |
1605 | ifam->ifam_addrflags = if_addrflags(ifa); |
1606 | #endif |
1607 | if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) |
1608 | w->w_where = (char *)w->w_where + len; |
1609 | } |
1610 | return error; |
1611 | } |
1612 | |
1613 | static int |
1614 | sysctl_iflist(int af, struct rt_walkarg *w, int type) |
1615 | { |
1616 | struct ifnet *ifp; |
1617 | struct ifaddr *ifa; |
1618 | struct rt_addrinfo info; |
1619 | int cmd, len, error = 0; |
1620 | int (*iflist_if)(struct ifnet *, struct rt_walkarg *, |
1621 | struct rt_addrinfo *, size_t); |
1622 | int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, |
1623 | struct rt_addrinfo *); |
1624 | int s; |
1625 | struct psref psref; |
1626 | int bound = curlwp_bind(); |
1627 | |
1628 | switch (type) { |
1629 | case NET_RT_IFLIST: |
1630 | cmd = RTM_IFINFO; |
1631 | iflist_if = sysctl_iflist_if; |
1632 | iflist_addr = sysctl_iflist_addr; |
1633 | break; |
1634 | #ifdef COMPAT_14 |
1635 | case NET_RT_OOOIFLIST: |
1636 | cmd = RTM_OOIFINFO; |
1637 | iflist_if = compat_14_iflist; |
1638 | iflist_addr = compat_70_iflist_addr; |
1639 | break; |
1640 | #endif |
1641 | #ifdef COMPAT_50 |
1642 | case NET_RT_OOIFLIST: |
1643 | cmd = RTM_OIFINFO; |
1644 | iflist_if = compat_50_iflist; |
1645 | iflist_addr = compat_70_iflist_addr; |
1646 | break; |
1647 | #endif |
1648 | #ifdef COMPAT_70 |
1649 | case NET_RT_OIFLIST: |
1650 | cmd = RTM_IFINFO; |
1651 | iflist_if = sysctl_iflist_if; |
1652 | iflist_addr = compat_70_iflist_addr; |
1653 | break; |
1654 | #endif |
1655 | default: |
1656 | #ifdef DIAGNOSTIC |
1657 | printf("sysctl_iflist\n" ); |
1658 | #endif |
1659 | return EINVAL; |
1660 | } |
1661 | |
1662 | memset(&info, 0, sizeof(info)); |
1663 | |
1664 | s = pserialize_read_enter(); |
1665 | IFNET_READER_FOREACH(ifp) { |
1666 | if (w->w_arg && w->w_arg != ifp->if_index) |
1667 | continue; |
1668 | if (IFADDR_READER_EMPTY(ifp)) |
1669 | continue; |
1670 | |
1671 | psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); |
1672 | pserialize_read_exit(s); |
1673 | |
1674 | info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; |
1675 | if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) |
1676 | goto release_exit; |
1677 | info.rti_info[RTAX_IFP] = NULL; |
1678 | if (w->w_where && w->w_tmem && w->w_needed <= 0) { |
1679 | if ((error = iflist_if(ifp, w, &info, len)) != 0) |
1680 | goto release_exit; |
1681 | } |
1682 | IFADDR_READER_FOREACH(ifa, ifp) { |
1683 | if (af && af != ifa->ifa_addr->sa_family) |
1684 | continue; |
1685 | info.rti_info[RTAX_IFA] = ifa->ifa_addr; |
1686 | info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; |
1687 | info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; |
1688 | if ((error = iflist_addr(w, ifa, &info)) != 0) |
1689 | goto release_exit; |
1690 | } |
1691 | info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = |
1692 | info.rti_info[RTAX_BRD] = NULL; |
1693 | |
1694 | s = pserialize_read_enter(); |
1695 | psref_release(&psref, &ifp->if_psref, ifnet_psref_class); |
1696 | } |
1697 | pserialize_read_exit(s); |
1698 | curlwp_bindx(bound); |
1699 | |
1700 | return 0; |
1701 | |
1702 | release_exit: |
1703 | psref_release(&psref, &ifp->if_psref, ifnet_psref_class); |
1704 | curlwp_bindx(bound); |
1705 | return error; |
1706 | } |
1707 | |
1708 | static int |
1709 | sysctl_rtable(SYSCTLFN_ARGS) |
1710 | { |
1711 | void *where = oldp; |
1712 | size_t *given = oldlenp; |
1713 | int i, s, error = EINVAL; |
1714 | u_char af; |
1715 | struct rt_walkarg w; |
1716 | |
1717 | if (namelen == 1 && name[0] == CTL_QUERY) |
1718 | return sysctl_query(SYSCTLFN_CALL(rnode)); |
1719 | |
1720 | if (newp) |
1721 | return EPERM; |
1722 | if (namelen != 3) |
1723 | return EINVAL; |
1724 | af = name[0]; |
1725 | w.w_tmemneeded = 0; |
1726 | w.w_tmemsize = 0; |
1727 | w.w_tmem = NULL; |
1728 | again: |
1729 | /* we may return here if a later [re]alloc of the t_mem buffer fails */ |
1730 | if (w.w_tmemneeded) { |
1731 | w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); |
1732 | w.w_tmemsize = w.w_tmemneeded; |
1733 | w.w_tmemneeded = 0; |
1734 | } |
1735 | w.w_op = name[1]; |
1736 | w.w_arg = name[2]; |
1737 | w.w_given = *given; |
1738 | w.w_needed = 0 - w.w_given; |
1739 | w.w_where = where; |
1740 | |
1741 | s = splsoftnet(); |
1742 | switch (w.w_op) { |
1743 | |
1744 | case NET_RT_DUMP: |
1745 | case NET_RT_FLAGS: |
1746 | #ifdef INET |
1747 | /* |
1748 | * take care of llinfo entries, the caller must |
1749 | * specify an AF |
1750 | */ |
1751 | if (w.w_op == NET_RT_FLAGS && |
1752 | (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { |
1753 | if (af != 0) |
1754 | error = lltable_sysctl_dumparp(af, &w); |
1755 | else |
1756 | error = EINVAL; |
1757 | break; |
1758 | } |
1759 | #endif /* INET */ |
1760 | |
1761 | for (i = 1; i <= AF_MAX; i++) |
1762 | if ((af == 0 || af == i) && |
1763 | (error = rt_walktree(i, sysctl_dumpentry, &w))) |
1764 | break; |
1765 | break; |
1766 | |
1767 | #ifdef COMPAT_14 |
1768 | case NET_RT_OOOIFLIST: |
1769 | error = sysctl_iflist(af, &w, w.w_op); |
1770 | break; |
1771 | #endif |
1772 | #ifdef COMPAT_50 |
1773 | case NET_RT_OOIFLIST: |
1774 | error = sysctl_iflist(af, &w, w.w_op); |
1775 | break; |
1776 | #endif |
1777 | #ifdef COMPAT_70 |
1778 | case NET_RT_OIFLIST: |
1779 | error = sysctl_iflist(af, &w, w.w_op); |
1780 | break; |
1781 | #endif |
1782 | case NET_RT_IFLIST: |
1783 | error = sysctl_iflist(af, &w, w.w_op); |
1784 | break; |
1785 | } |
1786 | splx(s); |
1787 | |
1788 | /* check to see if we couldn't allocate memory with NOWAIT */ |
1789 | if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) |
1790 | goto again; |
1791 | |
1792 | if (w.w_tmem) |
1793 | free(w.w_tmem, M_RTABLE); |
1794 | w.w_needed += w.w_given; |
1795 | if (where) { |
1796 | *given = (char *)w.w_where - (char *)where; |
1797 | if (*given < w.w_needed) |
1798 | return ENOMEM; |
1799 | } else { |
1800 | *given = (11 * w.w_needed) / 10; |
1801 | } |
1802 | return error; |
1803 | } |
1804 | |
1805 | /* |
1806 | * Routing message software interrupt routine |
1807 | */ |
1808 | static void |
1809 | COMPATNAME(route_intr)(void *cookie) |
1810 | { |
1811 | struct sockproto proto = { .sp_family = PF_XROUTE, }; |
1812 | struct route_info * const ri = &COMPATNAME(route_info); |
1813 | struct mbuf *m; |
1814 | |
1815 | mutex_enter(softnet_lock); |
1816 | KERNEL_LOCK(1, NULL); |
1817 | for (;;) { |
1818 | IFQ_LOCK(&ri->ri_intrq); |
1819 | IF_DEQUEUE(&ri->ri_intrq, m); |
1820 | IFQ_UNLOCK(&ri->ri_intrq); |
1821 | if (m == NULL) |
1822 | break; |
1823 | proto.sp_protocol = M_GETCTX(m, uintptr_t); |
1824 | raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); |
1825 | } |
1826 | KERNEL_UNLOCK_ONE(NULL); |
1827 | mutex_exit(softnet_lock); |
1828 | } |
1829 | |
1830 | /* |
1831 | * Enqueue a message to the software interrupt routine. |
1832 | */ |
1833 | void |
1834 | COMPATNAME(route_enqueue)(struct mbuf *m, int family) |
1835 | { |
1836 | struct route_info * const ri = &COMPATNAME(route_info); |
1837 | int wasempty; |
1838 | |
1839 | IFQ_LOCK(&ri->ri_intrq); |
1840 | if (IF_QFULL(&ri->ri_intrq)) { |
1841 | IF_DROP(&ri->ri_intrq); |
1842 | IFQ_UNLOCK(&ri->ri_intrq); |
1843 | m_freem(m); |
1844 | } else { |
1845 | wasempty = IF_IS_EMPTY(&ri->ri_intrq); |
1846 | M_SETCTX(m, (uintptr_t)family); |
1847 | IF_ENQUEUE(&ri->ri_intrq, m); |
1848 | IFQ_UNLOCK(&ri->ri_intrq); |
1849 | if (wasempty) { |
1850 | kpreempt_disable(); |
1851 | softint_schedule(ri->ri_sih); |
1852 | kpreempt_enable(); |
1853 | } |
1854 | } |
1855 | } |
1856 | |
1857 | static void |
1858 | COMPATNAME(route_init)(void) |
1859 | { |
1860 | struct route_info * const ri = &COMPATNAME(route_info); |
1861 | |
1862 | #ifndef COMPAT_RTSOCK |
1863 | rt_init(); |
1864 | #endif |
1865 | |
1866 | sysctl_net_route_setup(NULL); |
1867 | ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; |
1868 | ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, |
1869 | COMPATNAME(route_intr), NULL); |
1870 | IFQ_LOCK_INIT(&ri->ri_intrq); |
1871 | } |
1872 | |
1873 | /* |
1874 | * Definitions of protocols supported in the ROUTE domain. |
1875 | */ |
1876 | #ifndef COMPAT_RTSOCK |
1877 | PR_WRAP_USRREQS(route); |
1878 | #else |
1879 | PR_WRAP_USRREQS(compat_50_route); |
1880 | #endif |
1881 | |
1882 | static const struct pr_usrreqs route_usrreqs = { |
1883 | .pr_attach = COMPATNAME(route_attach_wrapper), |
1884 | .pr_detach = COMPATNAME(route_detach_wrapper), |
1885 | .pr_accept = COMPATNAME(route_accept_wrapper), |
1886 | .pr_bind = COMPATNAME(route_bind_wrapper), |
1887 | .pr_listen = COMPATNAME(route_listen_wrapper), |
1888 | .pr_connect = COMPATNAME(route_connect_wrapper), |
1889 | .pr_connect2 = COMPATNAME(route_connect2_wrapper), |
1890 | .pr_disconnect = COMPATNAME(route_disconnect_wrapper), |
1891 | .pr_shutdown = COMPATNAME(route_shutdown_wrapper), |
1892 | .pr_abort = COMPATNAME(route_abort_wrapper), |
1893 | .pr_ioctl = COMPATNAME(route_ioctl_wrapper), |
1894 | .pr_stat = COMPATNAME(route_stat_wrapper), |
1895 | .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), |
1896 | .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), |
1897 | .pr_rcvd = COMPATNAME(route_rcvd_wrapper), |
1898 | .pr_recvoob = COMPATNAME(route_recvoob_wrapper), |
1899 | .pr_send = COMPATNAME(route_send_wrapper), |
1900 | .pr_sendoob = COMPATNAME(route_sendoob_wrapper), |
1901 | .pr_purgeif = COMPATNAME(route_purgeif_wrapper), |
1902 | }; |
1903 | |
1904 | static const struct protosw COMPATNAME(route_protosw)[] = { |
1905 | { |
1906 | .pr_type = SOCK_RAW, |
1907 | .pr_domain = &COMPATNAME(routedomain), |
1908 | .pr_flags = PR_ATOMIC|PR_ADDR, |
1909 | .pr_input = raw_input, |
1910 | .pr_ctlinput = raw_ctlinput, |
1911 | .pr_usrreqs = &route_usrreqs, |
1912 | .pr_init = raw_init, |
1913 | }, |
1914 | }; |
1915 | |
1916 | struct domain COMPATNAME(routedomain) = { |
1917 | .dom_family = PF_XROUTE, |
1918 | .dom_name = DOMAINNAME, |
1919 | .dom_init = COMPATNAME(route_init), |
1920 | .dom_protosw = COMPATNAME(route_protosw), |
1921 | .dom_protoswNPROTOSW = |
1922 | &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], |
1923 | }; |
1924 | |
1925 | static void |
1926 | sysctl_net_route_setup(struct sysctllog **clog) |
1927 | { |
1928 | const struct sysctlnode *rnode = NULL; |
1929 | |
1930 | sysctl_createv(clog, 0, NULL, &rnode, |
1931 | CTLFLAG_PERMANENT, |
1932 | CTLTYPE_NODE, DOMAINNAME, |
1933 | SYSCTL_DESCR("PF_ROUTE information" ), |
1934 | NULL, 0, NULL, 0, |
1935 | CTL_NET, PF_XROUTE, CTL_EOL); |
1936 | |
1937 | sysctl_createv(clog, 0, NULL, NULL, |
1938 | CTLFLAG_PERMANENT, |
1939 | CTLTYPE_NODE, "rtable" , |
1940 | SYSCTL_DESCR("Routing table information" ), |
1941 | sysctl_rtable, 0, NULL, 0, |
1942 | CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); |
1943 | |
1944 | sysctl_createv(clog, 0, &rnode, NULL, |
1945 | CTLFLAG_PERMANENT, |
1946 | CTLTYPE_STRUCT, "stats" , |
1947 | SYSCTL_DESCR("Routing statistics" ), |
1948 | NULL, 0, &rtstat, sizeof(rtstat), |
1949 | CTL_CREATE, CTL_EOL); |
1950 | } |
1951 | |