Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/net/rtsock.c
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1 /*- 2 * Copyright (c) 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 30 * $FreeBSD$ 31 */ 32 #include "opt_sctp.h" 33 #include <sys/param.h> 34 #include <sys/domain.h> 35 #include <sys/kernel.h> 36 #include <sys/jail.h> 37 #include <sys/malloc.h> 38 #include <sys/mbuf.h> 39 #include <sys/priv.h> 40 #include <sys/proc.h> 41 #include <sys/protosw.h> 42 #include <sys/signalvar.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/sysctl.h> 46 #include <sys/systm.h> 47 48 #include <net/if.h> 49 #include <net/netisr.h> 50 #include <net/raw_cb.h> 51 #include <net/route.h> 52 53 #include <netinet/in.h> 54 55 #ifdef SCTP 56 extern void sctp_addr_change(struct ifaddr *ifa, int cmd); 57 #endif /* SCTP */ 58 59 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 60 61 /* NB: these are not modified */ 62 static struct sockaddr route_src = { 2, PF_ROUTE, }; 63 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 64 65 static struct { 66 int ip_count; /* attached w/ AF_INET */ 67 int ip6_count; /* attached w/ AF_INET6 */ 68 int ipx_count; /* attached w/ AF_IPX */ 69 int any_count; /* total attached */ 70 } route_cb; 71 72 struct mtx rtsock_mtx; 73 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF); 74 75 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx) 76 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx) 77 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED) 78 79 static struct ifqueue rtsintrq; 80 81 SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, ""); 82 SYSCTL_INT(_net_route, OID_AUTO, netisr_maxqlen, CTLFLAG_RW, 83 &rtsintrq.ifq_maxlen, 0, "maximum routing socket dispatch queue length"); 84 85 struct walkarg { 86 int w_tmemsize; 87 int w_op, w_arg; 88 caddr_t w_tmem; 89 struct sysctl_req *w_req; 90 }; 91 92 static void rts_input(struct mbuf *m); 93 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo); 94 static int rt_msg2(int type, struct rt_addrinfo *rtinfo, 95 caddr_t cp, struct walkarg *w); 96 static int rt_xaddrs(caddr_t cp, caddr_t cplim, 97 struct rt_addrinfo *rtinfo); 98 static int sysctl_dumpentry(struct radix_node *rn, void *vw); 99 static int sysctl_iflist(int af, struct walkarg *w); 100 static int sysctl_ifmalist(int af, struct walkarg *w); 101 static int route_output(struct mbuf *m, struct socket *so); 102 static void rt_setmetrics(u_long which, const struct rt_metrics *in, 103 struct rt_metrics_lite *out); 104 static void rt_getmetrics(const struct rt_metrics_lite *in, 105 struct rt_metrics *out); 106 static void rt_dispatch(struct mbuf *, const struct sockaddr *); 107 108 static void 109 rts_init(void) 110 { 111 int tmp; 112 113 rtsintrq.ifq_maxlen = 256; 114 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp)) 115 rtsintrq.ifq_maxlen = tmp; 116 mtx_init(&rtsintrq.ifq_mtx, "rts_inq", NULL, MTX_DEF); 117 netisr_register(NETISR_ROUTE, rts_input, &rtsintrq, NETISR_MPSAFE); 118 } 119 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0); 120 121 static void 122 rts_input(struct mbuf *m) 123 { 124 struct sockproto route_proto; 125 unsigned short *family; 126 struct m_tag *tag; 127 128 route_proto.sp_family = PF_ROUTE; 129 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL); 130 if (tag != NULL) { 131 family = (unsigned short *)(tag + 1); 132 route_proto.sp_protocol = *family; 133 m_tag_delete(m, tag); 134 } else 135 route_proto.sp_protocol = 0; 136 137 raw_input(m, &route_proto, &route_src); 138 } 139 140 /* 141 * It really doesn't make any sense at all for this code to share much 142 * with raw_usrreq.c, since its functionality is so restricted. XXX 143 */ 144 static void 145 rts_abort(struct socket *so) 146 { 147 148 raw_usrreqs.pru_abort(so); 149 } 150 151 static void 152 rts_close(struct socket *so) 153 { 154 155 raw_usrreqs.pru_close(so); 156 } 157 158 /* pru_accept is EOPNOTSUPP */ 159 160 static int 161 rts_attach(struct socket *so, int proto, struct thread *td) 162 { 163 struct rawcb *rp; 164 int s, error; 165 166 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL")); 167 168 /* XXX */ 169 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 170 if (rp == NULL) 171 return ENOBUFS; 172 173 /* 174 * The splnet() is necessary to block protocols from sending 175 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 176 * this PCB is extant but incompletely initialized. 177 * Probably we should try to do more of this work beforehand and 178 * eliminate the spl. 179 */ 180 s = splnet(); 181 so->so_pcb = (caddr_t)rp; 182 so->so_fibnum = td->td_proc->p_fibnum; 183 error = raw_attach(so, proto); 184 rp = sotorawcb(so); 185 if (error) { 186 splx(s); 187 so->so_pcb = NULL; 188 free(rp, M_PCB); 189 return error; 190 } 191 RTSOCK_LOCK(); 192 switch(rp->rcb_proto.sp_protocol) { 193 case AF_INET: 194 route_cb.ip_count++; 195 break; 196 case AF_INET6: 197 route_cb.ip6_count++; 198 break; 199 case AF_IPX: 200 route_cb.ipx_count++; 201 break; 202 } 203 route_cb.any_count++; 204 RTSOCK_UNLOCK(); 205 soisconnected(so); 206 so->so_options |= SO_USELOOPBACK; 207 splx(s); 208 return 0; 209 } 210 211 static int 212 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 213 { 214 215 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */ 216 } 217 218 static int 219 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 220 { 221 222 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */ 223 } 224 225 /* pru_connect2 is EOPNOTSUPP */ 226 /* pru_control is EOPNOTSUPP */ 227 228 static void 229 rts_detach(struct socket *so) 230 { 231 struct rawcb *rp = sotorawcb(so); 232 233 KASSERT(rp != NULL, ("rts_detach: rp == NULL")); 234 235 RTSOCK_LOCK(); 236 switch(rp->rcb_proto.sp_protocol) { 237 case AF_INET: 238 route_cb.ip_count--; 239 break; 240 case AF_INET6: 241 route_cb.ip6_count--; 242 break; 243 case AF_IPX: 244 route_cb.ipx_count--; 245 break; 246 } 247 route_cb.any_count--; 248 RTSOCK_UNLOCK(); 249 raw_usrreqs.pru_detach(so); 250 } 251 252 static int 253 rts_disconnect(struct socket *so) 254 { 255 256 return (raw_usrreqs.pru_disconnect(so)); 257 } 258 259 /* pru_listen is EOPNOTSUPP */ 260 261 static int 262 rts_peeraddr(struct socket *so, struct sockaddr **nam) 263 { 264 265 return (raw_usrreqs.pru_peeraddr(so, nam)); 266 } 267 268 /* pru_rcvd is EOPNOTSUPP */ 269 /* pru_rcvoob is EOPNOTSUPP */ 270 271 static int 272 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 273 struct mbuf *control, struct thread *td) 274 { 275 276 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 277 } 278 279 /* pru_sense is null */ 280 281 static int 282 rts_shutdown(struct socket *so) 283 { 284 285 return (raw_usrreqs.pru_shutdown(so)); 286 } 287 288 static int 289 rts_sockaddr(struct socket *so, struct sockaddr **nam) 290 { 291 292 return (raw_usrreqs.pru_sockaddr(so, nam)); 293 } 294 295 static struct pr_usrreqs route_usrreqs = { 296 .pru_abort = rts_abort, 297 .pru_attach = rts_attach, 298 .pru_bind = rts_bind, 299 .pru_connect = rts_connect, 300 .pru_detach = rts_detach, 301 .pru_disconnect = rts_disconnect, 302 .pru_peeraddr = rts_peeraddr, 303 .pru_send = rts_send, 304 .pru_shutdown = rts_shutdown, 305 .pru_sockaddr = rts_sockaddr, 306 .pru_close = rts_close, 307 }; 308 309 /*ARGSUSED*/ 310 static int 311 route_output(struct mbuf *m, struct socket *so) 312 { 313 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0) 314 struct rt_msghdr *rtm = NULL; 315 struct rtentry *rt = NULL; 316 struct radix_node_head *rnh; 317 struct rt_addrinfo info; 318 int len, error = 0; 319 struct ifnet *ifp = NULL; 320 struct sockaddr_in jail; 321 322 #define senderr(e) { error = e; goto flush;} 323 if (m == NULL || ((m->m_len < sizeof(long)) && 324 (m = m_pullup(m, sizeof(long))) == NULL)) 325 return (ENOBUFS); 326 if ((m->m_flags & M_PKTHDR) == 0) 327 panic("route_output"); 328 len = m->m_pkthdr.len; 329 if (len < sizeof(*rtm) || 330 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 331 info.rti_info[RTAX_DST] = NULL; 332 senderr(EINVAL); 333 } 334 R_Malloc(rtm, struct rt_msghdr *, len); 335 if (rtm == NULL) { 336 info.rti_info[RTAX_DST] = NULL; 337 senderr(ENOBUFS); 338 } 339 m_copydata(m, 0, len, (caddr_t)rtm); 340 if (rtm->rtm_version != RTM_VERSION) { 341 info.rti_info[RTAX_DST] = NULL; 342 senderr(EPROTONOSUPPORT); 343 } 344 rtm->rtm_pid = curproc->p_pid; 345 bzero(&info, sizeof(info)); 346 info.rti_addrs = rtm->rtm_addrs; 347 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { 348 info.rti_info[RTAX_DST] = NULL; 349 senderr(EINVAL); 350 } 351 info.rti_flags = rtm->rtm_flags; 352 if (info.rti_info[RTAX_DST] == NULL || 353 info.rti_info[RTAX_DST]->sa_family >= AF_MAX || 354 (info.rti_info[RTAX_GATEWAY] != NULL && 355 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) 356 senderr(EINVAL); 357 if (info.rti_info[RTAX_GENMASK]) { 358 struct radix_node *t; 359 t = rn_addmask((caddr_t) info.rti_info[RTAX_GENMASK], 0, 1); 360 if (t != NULL && 361 bcmp((char *)(void *)info.rti_info[RTAX_GENMASK] + 1, 362 (char *)(void *)t->rn_key + 1, 363 ((struct sockaddr *)t->rn_key)->sa_len - 1) == 0) 364 info.rti_info[RTAX_GENMASK] = 365 (struct sockaddr *)t->rn_key; 366 else 367 senderr(ENOBUFS); 368 } 369 370 /* 371 * Verify that the caller has the appropriate privilege; RTM_GET 372 * is the only operation the non-superuser is allowed. 373 */ 374 if (rtm->rtm_type != RTM_GET) { 375 error = priv_check(curthread, PRIV_NET_ROUTE); 376 if (error) 377 senderr(error); 378 } 379 380 switch (rtm->rtm_type) { 381 struct rtentry *saved_nrt; 382 383 case RTM_ADD: 384 if (info.rti_info[RTAX_GATEWAY] == NULL) 385 senderr(EINVAL); 386 saved_nrt = NULL; 387 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt, 388 so->so_fibnum); 389 if (error == 0 && saved_nrt) { 390 RT_LOCK(saved_nrt); 391 rt_setmetrics(rtm->rtm_inits, 392 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 393 rtm->rtm_index = saved_nrt->rt_ifp->if_index; 394 RT_REMREF(saved_nrt); 395 saved_nrt->rt_genmask = info.rti_info[RTAX_GENMASK]; 396 RT_UNLOCK(saved_nrt); 397 } 398 break; 399 400 case RTM_DELETE: 401 saved_nrt = NULL; 402 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, 403 so->so_fibnum); 404 if (error == 0) { 405 RT_LOCK(saved_nrt); 406 rt = saved_nrt; 407 goto report; 408 } 409 break; 410 411 case RTM_GET: 412 case RTM_CHANGE: 413 case RTM_LOCK: 414 rnh = rt_tables[so->so_fibnum][info.rti_info[RTAX_DST]->sa_family]; 415 if (rnh == NULL) 416 senderr(EAFNOSUPPORT); 417 RADIX_NODE_HEAD_LOCK(rnh); 418 rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST], 419 info.rti_info[RTAX_NETMASK], rnh); 420 if (rt == NULL) { /* XXX looks bogus */ 421 RADIX_NODE_HEAD_UNLOCK(rnh); 422 senderr(ESRCH); 423 } 424 RT_LOCK(rt); 425 RT_ADDREF(rt); 426 RADIX_NODE_HEAD_UNLOCK(rnh); 427 428 /* 429 * Fix for PR: 82974 430 * 431 * RTM_CHANGE/LOCK need a perfect match, rn_lookup() 432 * returns a perfect match in case a netmask is 433 * specified. For host routes only a longest prefix 434 * match is returned so it is necessary to compare the 435 * existence of the netmask. If both have a netmask 436 * rnh_lookup() did a perfect match and if none of them 437 * have a netmask both are host routes which is also a 438 * perfect match. 439 */ 440 441 if (rtm->rtm_type != RTM_GET && 442 (!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) { 443 RT_UNLOCK(rt); 444 senderr(ESRCH); 445 } 446 447 switch(rtm->rtm_type) { 448 449 case RTM_GET: 450 report: 451 RT_LOCK_ASSERT(rt); 452 info.rti_info[RTAX_DST] = rt_key(rt); 453 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 454 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 455 info.rti_info[RTAX_GENMASK] = rt->rt_genmask; 456 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 457 ifp = rt->rt_ifp; 458 if (ifp) { 459 info.rti_info[RTAX_IFP] = 460 ifp->if_addr->ifa_addr; 461 if (jailed(so->so_cred)) { 462 bzero(&jail, sizeof(jail)); 463 jail.sin_family = PF_INET; 464 jail.sin_len = sizeof(jail); 465 jail.sin_addr.s_addr = 466 htonl(prison_getip(so->so_cred)); 467 info.rti_info[RTAX_IFA] = 468 (struct sockaddr *)&jail; 469 } else 470 info.rti_info[RTAX_IFA] = 471 rt->rt_ifa->ifa_addr; 472 if (ifp->if_flags & IFF_POINTOPOINT) 473 info.rti_info[RTAX_BRD] = 474 rt->rt_ifa->ifa_dstaddr; 475 rtm->rtm_index = ifp->if_index; 476 } else { 477 info.rti_info[RTAX_IFP] = NULL; 478 info.rti_info[RTAX_IFA] = NULL; 479 } 480 } else if ((ifp = rt->rt_ifp) != NULL) { 481 rtm->rtm_index = ifp->if_index; 482 } 483 len = rt_msg2(rtm->rtm_type, &info, NULL, NULL); 484 if (len > rtm->rtm_msglen) { 485 struct rt_msghdr *new_rtm; 486 R_Malloc(new_rtm, struct rt_msghdr *, len); 487 if (new_rtm == NULL) { 488 RT_UNLOCK(rt); 489 senderr(ENOBUFS); 490 } 491 bcopy(rtm, new_rtm, rtm->rtm_msglen); 492 Free(rtm); rtm = new_rtm; 493 } 494 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL); 495 rtm->rtm_flags = rt->rt_flags; 496 rtm->rtm_use = 0; 497 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx); 498 rtm->rtm_addrs = info.rti_addrs; 499 break; 500 501 case RTM_CHANGE: 502 /* 503 * New gateway could require new ifaddr, ifp; 504 * flags may also be different; ifp may be specified 505 * by ll sockaddr when protocol address is ambiguous 506 */ 507 if (((rt->rt_flags & RTF_GATEWAY) && 508 info.rti_info[RTAX_GATEWAY] != NULL) || 509 info.rti_info[RTAX_IFP] != NULL || 510 (info.rti_info[RTAX_IFA] != NULL && 511 !sa_equal(info.rti_info[RTAX_IFA], 512 rt->rt_ifa->ifa_addr))) { 513 RT_UNLOCK(rt); 514 if ((error = rt_getifa_fib(&info, 515 rt->rt_fibnum)) != 0) 516 senderr(error); 517 RT_LOCK(rt); 518 } 519 if (info.rti_ifa != NULL && 520 info.rti_ifa != rt->rt_ifa && 521 rt->rt_ifa != NULL && 522 rt->rt_ifa->ifa_rtrequest != NULL) { 523 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, 524 &info); 525 IFAFREE(rt->rt_ifa); 526 } 527 if (info.rti_info[RTAX_GATEWAY] != NULL) { 528 if ((error = rt_setgate(rt, rt_key(rt), 529 info.rti_info[RTAX_GATEWAY])) != 0) { 530 RT_UNLOCK(rt); 531 senderr(error); 532 } 533 if (!(rt->rt_flags & RTF_LLINFO)) 534 rt->rt_flags |= RTF_GATEWAY; 535 } 536 if (info.rti_ifa != NULL && 537 info.rti_ifa != rt->rt_ifa) { 538 IFAREF(info.rti_ifa); 539 rt->rt_ifa = info.rti_ifa; 540 rt->rt_ifp = info.rti_ifp; 541 } 542 /* Allow some flags to be toggled on change. */ 543 if (rtm->rtm_fmask & RTF_FMASK) 544 rt->rt_flags = (rt->rt_flags & 545 ~rtm->rtm_fmask) | 546 (rtm->rtm_flags & rtm->rtm_fmask); 547 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 548 &rt->rt_rmx); 549 rtm->rtm_index = rt->rt_ifp->if_index; 550 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 551 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 552 if (info.rti_info[RTAX_GENMASK]) 553 rt->rt_genmask = info.rti_info[RTAX_GENMASK]; 554 /* FALLTHROUGH */ 555 case RTM_LOCK: 556 /* We don't support locks anymore */ 557 break; 558 } 559 RT_UNLOCK(rt); 560 break; 561 562 default: 563 senderr(EOPNOTSUPP); 564 } 565 566 flush: 567 if (rtm) { 568 if (error) 569 rtm->rtm_errno = error; 570 else 571 rtm->rtm_flags |= RTF_DONE; 572 } 573 if (rt) /* XXX can this be true? */ 574 RTFREE(rt); 575 { 576 struct rawcb *rp = NULL; 577 /* 578 * Check to see if we don't want our own messages. 579 */ 580 if ((so->so_options & SO_USELOOPBACK) == 0) { 581 if (route_cb.any_count <= 1) { 582 if (rtm) 583 Free(rtm); 584 m_freem(m); 585 return (error); 586 } 587 /* There is another listener, so construct message */ 588 rp = sotorawcb(so); 589 } 590 if (rtm) { 591 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 592 if (m->m_pkthdr.len < rtm->rtm_msglen) { 593 m_freem(m); 594 m = NULL; 595 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 596 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 597 Free(rtm); 598 } 599 if (m) { 600 if (rp) { 601 /* 602 * XXX insure we don't get a copy by 603 * invalidating our protocol 604 */ 605 unsigned short family = rp->rcb_proto.sp_family; 606 rp->rcb_proto.sp_family = 0; 607 rt_dispatch(m, info.rti_info[RTAX_DST]); 608 rp->rcb_proto.sp_family = family; 609 } else 610 rt_dispatch(m, info.rti_info[RTAX_DST]); 611 } 612 } 613 return (error); 614 #undef sa_equal 615 } 616 617 static void 618 rt_setmetrics(u_long which, const struct rt_metrics *in, 619 struct rt_metrics_lite *out) 620 { 621 #define metric(f, e) if (which & (f)) out->e = in->e; 622 /* 623 * Only these are stored in the routing entry since introduction 624 * of tcp hostcache. The rest is ignored. 625 */ 626 metric(RTV_MTU, rmx_mtu); 627 /* Userland -> kernel timebase conversion. */ 628 if (which & RTV_EXPIRE) 629 out->rmx_expire = in->rmx_expire ? 630 in->rmx_expire - time_second + time_uptime : 0; 631 #undef metric 632 } 633 634 static void 635 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out) 636 { 637 #define metric(e) out->e = in->e; 638 bzero(out, sizeof(*out)); 639 metric(rmx_mtu); 640 /* Kernel -> userland timebase conversion. */ 641 out->rmx_expire = in->rmx_expire ? 642 in->rmx_expire - time_uptime + time_second : 0; 643 #undef metric 644 } 645 646 /* 647 * Extract the addresses of the passed sockaddrs. 648 * Do a little sanity checking so as to avoid bad memory references. 649 * This data is derived straight from userland. 650 */ 651 static int 652 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 653 { 654 struct sockaddr *sa; 655 int i; 656 657 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 658 if ((rtinfo->rti_addrs & (1 << i)) == 0) 659 continue; 660 sa = (struct sockaddr *)cp; 661 /* 662 * It won't fit. 663 */ 664 if (cp + sa->sa_len > cplim) 665 return (EINVAL); 666 /* 667 * there are no more.. quit now 668 * If there are more bits, they are in error. 669 * I've seen this. route(1) can evidently generate these. 670 * This causes kernel to core dump. 671 * for compatibility, If we see this, point to a safe address. 672 */ 673 if (sa->sa_len == 0) { 674 rtinfo->rti_info[i] = &sa_zero; 675 return (0); /* should be EINVAL but for compat */ 676 } 677 /* accept it */ 678 rtinfo->rti_info[i] = sa; 679 cp += SA_SIZE(sa); 680 } 681 return (0); 682 } 683 684 static struct mbuf * 685 rt_msg1(int type, struct rt_addrinfo *rtinfo) 686 { 687 struct rt_msghdr *rtm; 688 struct mbuf *m; 689 int i; 690 struct sockaddr *sa; 691 int len, dlen; 692 693 switch (type) { 694 695 case RTM_DELADDR: 696 case RTM_NEWADDR: 697 len = sizeof(struct ifa_msghdr); 698 break; 699 700 case RTM_DELMADDR: 701 case RTM_NEWMADDR: 702 len = sizeof(struct ifma_msghdr); 703 break; 704 705 case RTM_IFINFO: 706 len = sizeof(struct if_msghdr); 707 break; 708 709 case RTM_IFANNOUNCE: 710 case RTM_IEEE80211: 711 len = sizeof(struct if_announcemsghdr); 712 break; 713 714 default: 715 len = sizeof(struct rt_msghdr); 716 } 717 if (len > MCLBYTES) 718 panic("rt_msg1"); 719 m = m_gethdr(M_DONTWAIT, MT_DATA); 720 if (m && len > MHLEN) { 721 MCLGET(m, M_DONTWAIT); 722 if ((m->m_flags & M_EXT) == 0) { 723 m_free(m); 724 m = NULL; 725 } 726 } 727 if (m == NULL) 728 return (m); 729 m->m_pkthdr.len = m->m_len = len; 730 m->m_pkthdr.rcvif = NULL; 731 rtm = mtod(m, struct rt_msghdr *); 732 bzero((caddr_t)rtm, len); 733 for (i = 0; i < RTAX_MAX; i++) { 734 if ((sa = rtinfo->rti_info[i]) == NULL) 735 continue; 736 rtinfo->rti_addrs |= (1 << i); 737 dlen = SA_SIZE(sa); 738 m_copyback(m, len, dlen, (caddr_t)sa); 739 len += dlen; 740 } 741 if (m->m_pkthdr.len != len) { 742 m_freem(m); 743 return (NULL); 744 } 745 rtm->rtm_msglen = len; 746 rtm->rtm_version = RTM_VERSION; 747 rtm->rtm_type = type; 748 return (m); 749 } 750 751 static int 752 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w) 753 { 754 int i; 755 int len, dlen, second_time = 0; 756 caddr_t cp0; 757 758 rtinfo->rti_addrs = 0; 759 again: 760 switch (type) { 761 762 case RTM_DELADDR: 763 case RTM_NEWADDR: 764 len = sizeof(struct ifa_msghdr); 765 break; 766 767 case RTM_IFINFO: 768 len = sizeof(struct if_msghdr); 769 break; 770 771 case RTM_NEWMADDR: 772 len = sizeof(struct ifma_msghdr); 773 break; 774 775 default: 776 len = sizeof(struct rt_msghdr); 777 } 778 cp0 = cp; 779 if (cp0) 780 cp += len; 781 for (i = 0; i < RTAX_MAX; i++) { 782 struct sockaddr *sa; 783 784 if ((sa = rtinfo->rti_info[i]) == NULL) 785 continue; 786 rtinfo->rti_addrs |= (1 << i); 787 dlen = SA_SIZE(sa); 788 if (cp) { 789 bcopy((caddr_t)sa, cp, (unsigned)dlen); 790 cp += dlen; 791 } 792 len += dlen; 793 } 794 len = ALIGN(len); 795 if (cp == NULL && w != NULL && !second_time) { 796 struct walkarg *rw = w; 797 798 if (rw->w_req) { 799 if (rw->w_tmemsize < len) { 800 if (rw->w_tmem) 801 free(rw->w_tmem, M_RTABLE); 802 rw->w_tmem = (caddr_t) 803 malloc(len, M_RTABLE, M_NOWAIT); 804 if (rw->w_tmem) 805 rw->w_tmemsize = len; 806 } 807 if (rw->w_tmem) { 808 cp = rw->w_tmem; 809 second_time = 1; 810 goto again; 811 } 812 } 813 } 814 if (cp) { 815 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 816 817 rtm->rtm_version = RTM_VERSION; 818 rtm->rtm_type = type; 819 rtm->rtm_msglen = len; 820 } 821 return (len); 822 } 823 824 /* 825 * This routine is called to generate a message from the routing 826 * socket indicating that a redirect has occured, a routing lookup 827 * has failed, or that a protocol has detected timeouts to a particular 828 * destination. 829 */ 830 void 831 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 832 { 833 struct rt_msghdr *rtm; 834 struct mbuf *m; 835 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 836 837 if (route_cb.any_count == 0) 838 return; 839 m = rt_msg1(type, rtinfo); 840 if (m == NULL) 841 return; 842 rtm = mtod(m, struct rt_msghdr *); 843 rtm->rtm_flags = RTF_DONE | flags; 844 rtm->rtm_errno = error; 845 rtm->rtm_addrs = rtinfo->rti_addrs; 846 rt_dispatch(m, sa); 847 } 848 849 /* 850 * This routine is called to generate a message from the routing 851 * socket indicating that the status of a network interface has changed. 852 */ 853 void 854 rt_ifmsg(struct ifnet *ifp) 855 { 856 struct if_msghdr *ifm; 857 struct mbuf *m; 858 struct rt_addrinfo info; 859 860 if (route_cb.any_count == 0) 861 return; 862 bzero((caddr_t)&info, sizeof(info)); 863 m = rt_msg1(RTM_IFINFO, &info); 864 if (m == NULL) 865 return; 866 ifm = mtod(m, struct if_msghdr *); 867 ifm->ifm_index = ifp->if_index; 868 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 869 ifm->ifm_data = ifp->if_data; 870 ifm->ifm_addrs = 0; 871 rt_dispatch(m, NULL); 872 } 873 874 /* 875 * This is called to generate messages from the routing socket 876 * indicating a network interface has had addresses associated with it. 877 * if we ever reverse the logic and replace messages TO the routing 878 * socket indicate a request to configure interfaces, then it will 879 * be unnecessary as the routing socket will automatically generate 880 * copies of it. 881 */ 882 void 883 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 884 { 885 struct rt_addrinfo info; 886 struct sockaddr *sa = NULL; 887 int pass; 888 struct mbuf *m = NULL; 889 struct ifnet *ifp = ifa->ifa_ifp; 890 891 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 892 ("unexpected cmd %u", cmd)); 893 #ifdef SCTP 894 /* 895 * notify the SCTP stack 896 * this will only get called when an address is added/deleted 897 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 898 */ 899 sctp_addr_change(ifa, cmd); 900 #endif /* SCTP */ 901 if (route_cb.any_count == 0) 902 return; 903 for (pass = 1; pass < 3; pass++) { 904 bzero((caddr_t)&info, sizeof(info)); 905 if ((cmd == RTM_ADD && pass == 1) || 906 (cmd == RTM_DELETE && pass == 2)) { 907 struct ifa_msghdr *ifam; 908 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 909 910 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 911 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 912 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 913 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 914 if ((m = rt_msg1(ncmd, &info)) == NULL) 915 continue; 916 ifam = mtod(m, struct ifa_msghdr *); 917 ifam->ifam_index = ifp->if_index; 918 ifam->ifam_metric = ifa->ifa_metric; 919 ifam->ifam_flags = ifa->ifa_flags; 920 ifam->ifam_addrs = info.rti_addrs; 921 } 922 if ((cmd == RTM_ADD && pass == 2) || 923 (cmd == RTM_DELETE && pass == 1)) { 924 struct rt_msghdr *rtm; 925 926 if (rt == NULL) 927 continue; 928 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 929 info.rti_info[RTAX_DST] = sa = rt_key(rt); 930 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 931 if ((m = rt_msg1(cmd, &info)) == NULL) 932 continue; 933 rtm = mtod(m, struct rt_msghdr *); 934 rtm->rtm_index = ifp->if_index; 935 rtm->rtm_flags |= rt->rt_flags; 936 rtm->rtm_errno = error; 937 rtm->rtm_addrs = info.rti_addrs; 938 } 939 rt_dispatch(m, sa); 940 } 941 } 942 943 /* 944 * This is the analogue to the rt_newaddrmsg which performs the same 945 * function but for multicast group memberhips. This is easier since 946 * there is no route state to worry about. 947 */ 948 void 949 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 950 { 951 struct rt_addrinfo info; 952 struct mbuf *m = NULL; 953 struct ifnet *ifp = ifma->ifma_ifp; 954 struct ifma_msghdr *ifmam; 955 956 if (route_cb.any_count == 0) 957 return; 958 959 bzero((caddr_t)&info, sizeof(info)); 960 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 961 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL; 962 /* 963 * If a link-layer address is present, present it as a ``gateway'' 964 * (similarly to how ARP entries, e.g., are presented). 965 */ 966 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr; 967 m = rt_msg1(cmd, &info); 968 if (m == NULL) 969 return; 970 ifmam = mtod(m, struct ifma_msghdr *); 971 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n", 972 __func__)); 973 ifmam->ifmam_index = ifp->if_index; 974 ifmam->ifmam_addrs = info.rti_addrs; 975 rt_dispatch(m, ifma->ifma_addr); 976 } 977 978 static struct mbuf * 979 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 980 struct rt_addrinfo *info) 981 { 982 struct if_announcemsghdr *ifan; 983 struct mbuf *m; 984 985 if (route_cb.any_count == 0) 986 return NULL; 987 bzero((caddr_t)info, sizeof(*info)); 988 m = rt_msg1(type, info); 989 if (m != NULL) { 990 ifan = mtod(m, struct if_announcemsghdr *); 991 ifan->ifan_index = ifp->if_index; 992 strlcpy(ifan->ifan_name, ifp->if_xname, 993 sizeof(ifan->ifan_name)); 994 ifan->ifan_what = what; 995 } 996 return m; 997 } 998 999 /* 1000 * This is called to generate routing socket messages indicating 1001 * IEEE80211 wireless events. 1002 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1003 */ 1004 void 1005 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1006 { 1007 struct mbuf *m; 1008 struct rt_addrinfo info; 1009 1010 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1011 if (m != NULL) { 1012 /* 1013 * Append the ieee80211 data. Try to stick it in the 1014 * mbuf containing the ifannounce msg; otherwise allocate 1015 * a new mbuf and append. 1016 * 1017 * NB: we assume m is a single mbuf. 1018 */ 1019 if (data_len > M_TRAILINGSPACE(m)) { 1020 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1021 if (n == NULL) { 1022 m_freem(m); 1023 return; 1024 } 1025 bcopy(data, mtod(n, void *), data_len); 1026 n->m_len = data_len; 1027 m->m_next = n; 1028 } else if (data_len > 0) { 1029 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1030 m->m_len += data_len; 1031 } 1032 if (m->m_flags & M_PKTHDR) 1033 m->m_pkthdr.len += data_len; 1034 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1035 rt_dispatch(m, NULL); 1036 } 1037 } 1038 1039 /* 1040 * This is called to generate routing socket messages indicating 1041 * network interface arrival and departure. 1042 */ 1043 void 1044 rt_ifannouncemsg(struct ifnet *ifp, int what) 1045 { 1046 struct mbuf *m; 1047 struct rt_addrinfo info; 1048 1049 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1050 if (m != NULL) 1051 rt_dispatch(m, NULL); 1052 } 1053 1054 static void 1055 rt_dispatch(struct mbuf *m, const struct sockaddr *sa) 1056 { 1057 struct m_tag *tag; 1058 1059 /* 1060 * Preserve the family from the sockaddr, if any, in an m_tag for 1061 * use when injecting the mbuf into the routing socket buffer from 1062 * the netisr. 1063 */ 1064 if (sa != NULL) { 1065 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short), 1066 M_NOWAIT); 1067 if (tag == NULL) { 1068 m_freem(m); 1069 return; 1070 } 1071 *(unsigned short *)(tag + 1) = sa->sa_family; 1072 m_tag_prepend(m, tag); 1073 } 1074 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */ 1075 } 1076 1077 /* 1078 * This is used in dumping the kernel table via sysctl(). 1079 */ 1080 static int 1081 sysctl_dumpentry(struct radix_node *rn, void *vw) 1082 { 1083 struct walkarg *w = vw; 1084 struct rtentry *rt = (struct rtentry *)rn; 1085 int error = 0, size; 1086 struct rt_addrinfo info; 1087 1088 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1089 return 0; 1090 bzero((caddr_t)&info, sizeof(info)); 1091 info.rti_info[RTAX_DST] = rt_key(rt); 1092 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1093 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1094 info.rti_info[RTAX_GENMASK] = rt->rt_genmask; 1095 if (rt->rt_ifp) { 1096 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr; 1097 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1098 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1099 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr; 1100 } 1101 size = rt_msg2(RTM_GET, &info, NULL, w); 1102 if (w->w_req && w->w_tmem) { 1103 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 1104 1105 rtm->rtm_flags = rt->rt_flags; 1106 rtm->rtm_use = rt->rt_rmx.rmx_pksent; 1107 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx); 1108 rtm->rtm_index = rt->rt_ifp->if_index; 1109 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1110 rtm->rtm_addrs = info.rti_addrs; 1111 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 1112 return (error); 1113 } 1114 return (error); 1115 } 1116 1117 static int 1118 sysctl_iflist(int af, struct walkarg *w) 1119 { 1120 struct ifnet *ifp; 1121 struct ifaddr *ifa; 1122 struct rt_addrinfo info; 1123 int len, error = 0; 1124 1125 bzero((caddr_t)&info, sizeof(info)); 1126 IFNET_RLOCK(); 1127 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1128 if (w->w_arg && w->w_arg != ifp->if_index) 1129 continue; 1130 ifa = ifp->if_addr; 1131 info.rti_info[RTAX_IFP] = ifa->ifa_addr; 1132 len = rt_msg2(RTM_IFINFO, &info, NULL, w); 1133 info.rti_info[RTAX_IFP] = NULL; 1134 if (w->w_req && w->w_tmem) { 1135 struct if_msghdr *ifm; 1136 1137 ifm = (struct if_msghdr *)w->w_tmem; 1138 ifm->ifm_index = ifp->if_index; 1139 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1140 ifm->ifm_data = ifp->if_data; 1141 ifm->ifm_addrs = info.rti_addrs; 1142 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 1143 if (error) 1144 goto done; 1145 } 1146 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1147 if (af && af != ifa->ifa_addr->sa_family) 1148 continue; 1149 if (jailed(curthread->td_ucred) && 1150 prison_if(curthread->td_ucred, ifa->ifa_addr)) 1151 continue; 1152 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1153 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1154 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1155 len = rt_msg2(RTM_NEWADDR, &info, NULL, w); 1156 if (w->w_req && w->w_tmem) { 1157 struct ifa_msghdr *ifam; 1158 1159 ifam = (struct ifa_msghdr *)w->w_tmem; 1160 ifam->ifam_index = ifa->ifa_ifp->if_index; 1161 ifam->ifam_flags = ifa->ifa_flags; 1162 ifam->ifam_metric = ifa->ifa_metric; 1163 ifam->ifam_addrs = info.rti_addrs; 1164 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1165 if (error) 1166 goto done; 1167 } 1168 } 1169 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1170 info.rti_info[RTAX_BRD] = NULL; 1171 } 1172 done: 1173 IFNET_RUNLOCK(); 1174 return (error); 1175 } 1176 1177 int 1178 sysctl_ifmalist(int af, struct walkarg *w) 1179 { 1180 struct ifnet *ifp; 1181 struct ifmultiaddr *ifma; 1182 struct rt_addrinfo info; 1183 int len, error = 0; 1184 struct ifaddr *ifa; 1185 1186 bzero((caddr_t)&info, sizeof(info)); 1187 IFNET_RLOCK(); 1188 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1189 if (w->w_arg && w->w_arg != ifp->if_index) 1190 continue; 1191 ifa = ifp->if_addr; 1192 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL; 1193 IF_ADDR_LOCK(ifp); 1194 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1195 if (af && af != ifma->ifma_addr->sa_family) 1196 continue; 1197 if (jailed(curproc->p_ucred) && 1198 prison_if(curproc->p_ucred, ifma->ifma_addr)) 1199 continue; 1200 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1201 info.rti_info[RTAX_GATEWAY] = 1202 (ifma->ifma_addr->sa_family != AF_LINK) ? 1203 ifma->ifma_lladdr : NULL; 1204 len = rt_msg2(RTM_NEWMADDR, &info, NULL, w); 1205 if (w->w_req && w->w_tmem) { 1206 struct ifma_msghdr *ifmam; 1207 1208 ifmam = (struct ifma_msghdr *)w->w_tmem; 1209 ifmam->ifmam_index = ifma->ifma_ifp->if_index; 1210 ifmam->ifmam_flags = 0; 1211 ifmam->ifmam_addrs = info.rti_addrs; 1212 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1213 if (error) { 1214 IF_ADDR_UNLOCK(ifp); 1215 goto done; 1216 } 1217 } 1218 } 1219 IF_ADDR_UNLOCK(ifp); 1220 } 1221 done: 1222 IFNET_RUNLOCK(); 1223 return (error); 1224 } 1225 1226 static int 1227 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1228 { 1229 int *name = (int *)arg1; 1230 u_int namelen = arg2; 1231 struct radix_node_head *rnh; 1232 int i, lim, error = EINVAL; 1233 u_char af; 1234 struct walkarg w; 1235 1236 name ++; 1237 namelen--; 1238 if (req->newptr) 1239 return (EPERM); 1240 if (namelen != 3) 1241 return ((namelen < 3) ? EISDIR : ENOTDIR); 1242 af = name[0]; 1243 if (af > AF_MAX) 1244 return (EINVAL); 1245 bzero(&w, sizeof(w)); 1246 w.w_op = name[1]; 1247 w.w_arg = name[2]; 1248 w.w_req = req; 1249 1250 error = sysctl_wire_old_buffer(req, 0); 1251 if (error) 1252 return (error); 1253 switch (w.w_op) { 1254 1255 case NET_RT_DUMP: 1256 case NET_RT_FLAGS: 1257 if (af == 0) { /* dump all tables */ 1258 i = 1; 1259 lim = AF_MAX; 1260 } else /* dump only one table */ 1261 i = lim = af; 1262 for (error = 0; error == 0 && i <= lim; i++) 1263 if ((rnh = rt_tables[curthread->td_proc->p_fibnum][i]) != NULL) { 1264 RADIX_NODE_HEAD_LOCK(rnh); 1265 error = rnh->rnh_walktree(rnh, 1266 sysctl_dumpentry, &w); 1267 RADIX_NODE_HEAD_UNLOCK(rnh); 1268 } else if (af != 0) 1269 error = EAFNOSUPPORT; 1270 break; 1271 1272 case NET_RT_IFLIST: 1273 error = sysctl_iflist(af, &w); 1274 break; 1275 1276 case NET_RT_IFMALIST: 1277 error = sysctl_ifmalist(af, &w); 1278 break; 1279 } 1280 if (w.w_tmem) 1281 free(w.w_tmem, M_RTABLE); 1282 return (error); 1283 } 1284 1285 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1286 1287 /* 1288 * Definitions of protocols supported in the ROUTE domain. 1289 */ 1290 1291 static struct domain routedomain; /* or at least forward */ 1292 1293 static struct protosw routesw[] = { 1294 { 1295 .pr_type = SOCK_RAW, 1296 .pr_domain = &routedomain, 1297 .pr_flags = PR_ATOMIC|PR_ADDR, 1298 .pr_output = route_output, 1299 .pr_ctlinput = raw_ctlinput, 1300 .pr_init = raw_init, 1301 .pr_usrreqs = &route_usrreqs 1302 } 1303 }; 1304 1305 static struct domain routedomain = { 1306 .dom_family = PF_ROUTE, 1307 .dom_name = "route", 1308 .dom_protosw = routesw, 1309 .dom_protoswNPROTOSW = &routesw[sizeof(routesw)/sizeof(routesw[0])] 1310 }; 1311 1312 DOMAIN_SET(route);
Cache object: 3491073f2d96c3bb129c1137df5ffbc5
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