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 "opt_inet.h" 34 #include "opt_inet6.h" 35 36 #include <sys/param.h> 37 #include <sys/domain.h> 38 #include <sys/jail.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/priv.h> 43 #include <sys/proc.h> 44 #include <sys/protosw.h> 45 #include <sys/signalvar.h> 46 #include <sys/socket.h> 47 #include <sys/socketvar.h> 48 #include <sys/sysctl.h> 49 #include <sys/systm.h> 50 51 #include <net/if.h> 52 #include <net/netisr.h> 53 #include <net/raw_cb.h> 54 #include <net/route.h> 55 56 #include <netinet/in.h> 57 #ifdef INET6 58 #include <netinet6/scope6_var.h> 59 #endif 60 61 #ifdef SCTP 62 extern void sctp_addr_change(struct ifaddr *ifa, int cmd); 63 #endif /* SCTP */ 64 65 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 66 67 /* NB: these are not modified */ 68 static struct sockaddr route_src = { 2, PF_ROUTE, }; 69 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 70 71 static struct { 72 int ip_count; /* attached w/ AF_INET */ 73 int ip6_count; /* attached w/ AF_INET6 */ 74 int ipx_count; /* attached w/ AF_IPX */ 75 int any_count; /* total attached */ 76 } route_cb; 77 78 struct mtx rtsock_mtx; 79 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF); 80 81 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx) 82 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx) 83 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED) 84 85 static struct ifqueue rtsintrq; 86 87 SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, ""); 88 SYSCTL_INT(_net_route, OID_AUTO, netisr_maxqlen, CTLFLAG_RW, 89 &rtsintrq.ifq_maxlen, 0, "maximum routing socket dispatch queue length"); 90 91 struct walkarg { 92 int w_tmemsize; 93 int w_op, w_arg; 94 caddr_t w_tmem; 95 struct sysctl_req *w_req; 96 }; 97 98 static void rts_input(struct mbuf *m); 99 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo); 100 static int rt_msg2(int type, struct rt_addrinfo *rtinfo, 101 caddr_t cp, struct walkarg *w); 102 static int rt_xaddrs(caddr_t cp, caddr_t cplim, 103 struct rt_addrinfo *rtinfo); 104 static int sysctl_dumpentry(struct radix_node *rn, void *vw); 105 static int sysctl_iflist(int af, struct walkarg *w); 106 static int sysctl_ifmalist(int af, struct walkarg *w); 107 static int route_output(struct mbuf *m, struct socket *so); 108 static void rt_setmetrics(u_long which, const struct rt_metrics *in, 109 struct rt_metrics_lite *out); 110 static void rt_getmetrics(const struct rt_metrics_lite *in, 111 struct rt_metrics *out); 112 static void rt_dispatch(struct mbuf *, const struct sockaddr *); 113 114 static void 115 rts_init(void) 116 { 117 int tmp; 118 119 rtsintrq.ifq_maxlen = 256; 120 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp)) 121 rtsintrq.ifq_maxlen = tmp; 122 mtx_init(&rtsintrq.ifq_mtx, "rts_inq", NULL, MTX_DEF); 123 netisr_register(NETISR_ROUTE, rts_input, &rtsintrq, NETISR_MPSAFE); 124 } 125 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0); 126 127 static void 128 rts_input(struct mbuf *m) 129 { 130 struct sockproto route_proto; 131 unsigned short *family; 132 struct m_tag *tag; 133 134 route_proto.sp_family = PF_ROUTE; 135 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL); 136 if (tag != NULL) { 137 family = (unsigned short *)(tag + 1); 138 route_proto.sp_protocol = *family; 139 m_tag_delete(m, tag); 140 } else 141 route_proto.sp_protocol = 0; 142 143 raw_input(m, &route_proto, &route_src); 144 } 145 146 /* 147 * It really doesn't make any sense at all for this code to share much 148 * with raw_usrreq.c, since its functionality is so restricted. XXX 149 */ 150 static void 151 rts_abort(struct socket *so) 152 { 153 154 raw_usrreqs.pru_abort(so); 155 } 156 157 static void 158 rts_close(struct socket *so) 159 { 160 161 raw_usrreqs.pru_close(so); 162 } 163 164 /* pru_accept is EOPNOTSUPP */ 165 166 static int 167 rts_attach(struct socket *so, int proto, struct thread *td) 168 { 169 struct rawcb *rp; 170 int s, error; 171 172 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL")); 173 174 /* XXX */ 175 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 176 if (rp == NULL) 177 return ENOBUFS; 178 179 /* 180 * The splnet() is necessary to block protocols from sending 181 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 182 * this PCB is extant but incompletely initialized. 183 * Probably we should try to do more of this work beforehand and 184 * eliminate the spl. 185 */ 186 s = splnet(); 187 so->so_pcb = (caddr_t)rp; 188 so->so_fibnum = td->td_proc->p_fibnum; 189 error = raw_attach(so, proto); 190 rp = sotorawcb(so); 191 if (error) { 192 splx(s); 193 so->so_pcb = NULL; 194 free(rp, M_PCB); 195 return error; 196 } 197 RTSOCK_LOCK(); 198 switch(rp->rcb_proto.sp_protocol) { 199 case AF_INET: 200 route_cb.ip_count++; 201 break; 202 case AF_INET6: 203 route_cb.ip6_count++; 204 break; 205 case AF_IPX: 206 route_cb.ipx_count++; 207 break; 208 } 209 route_cb.any_count++; 210 RTSOCK_UNLOCK(); 211 soisconnected(so); 212 so->so_options |= SO_USELOOPBACK; 213 splx(s); 214 return 0; 215 } 216 217 static int 218 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 219 { 220 221 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */ 222 } 223 224 static int 225 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 226 { 227 228 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */ 229 } 230 231 /* pru_connect2 is EOPNOTSUPP */ 232 /* pru_control is EOPNOTSUPP */ 233 234 static void 235 rts_detach(struct socket *so) 236 { 237 struct rawcb *rp = sotorawcb(so); 238 239 KASSERT(rp != NULL, ("rts_detach: rp == NULL")); 240 241 RTSOCK_LOCK(); 242 switch(rp->rcb_proto.sp_protocol) { 243 case AF_INET: 244 route_cb.ip_count--; 245 break; 246 case AF_INET6: 247 route_cb.ip6_count--; 248 break; 249 case AF_IPX: 250 route_cb.ipx_count--; 251 break; 252 } 253 route_cb.any_count--; 254 RTSOCK_UNLOCK(); 255 raw_usrreqs.pru_detach(so); 256 } 257 258 static int 259 rts_disconnect(struct socket *so) 260 { 261 262 return (raw_usrreqs.pru_disconnect(so)); 263 } 264 265 /* pru_listen is EOPNOTSUPP */ 266 267 static int 268 rts_peeraddr(struct socket *so, struct sockaddr **nam) 269 { 270 271 return (raw_usrreqs.pru_peeraddr(so, nam)); 272 } 273 274 /* pru_rcvd is EOPNOTSUPP */ 275 /* pru_rcvoob is EOPNOTSUPP */ 276 277 static int 278 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 279 struct mbuf *control, struct thread *td) 280 { 281 282 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 283 } 284 285 /* pru_sense is null */ 286 287 static int 288 rts_shutdown(struct socket *so) 289 { 290 291 return (raw_usrreqs.pru_shutdown(so)); 292 } 293 294 static int 295 rts_sockaddr(struct socket *so, struct sockaddr **nam) 296 { 297 298 return (raw_usrreqs.pru_sockaddr(so, nam)); 299 } 300 301 static struct pr_usrreqs route_usrreqs = { 302 .pru_abort = rts_abort, 303 .pru_attach = rts_attach, 304 .pru_bind = rts_bind, 305 .pru_connect = rts_connect, 306 .pru_detach = rts_detach, 307 .pru_disconnect = rts_disconnect, 308 .pru_peeraddr = rts_peeraddr, 309 .pru_send = rts_send, 310 .pru_shutdown = rts_shutdown, 311 .pru_sockaddr = rts_sockaddr, 312 .pru_close = rts_close, 313 }; 314 315 #ifndef _SOCKADDR_UNION_DEFINED 316 #define _SOCKADDR_UNION_DEFINED 317 /* 318 * The union of all possible address formats we handle. 319 */ 320 union sockaddr_union { 321 struct sockaddr sa; 322 struct sockaddr_in sin; 323 struct sockaddr_in6 sin6; 324 }; 325 #endif /* _SOCKADDR_UNION_DEFINED */ 326 327 static int 328 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp, 329 struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred) 330 { 331 332 /* First, see if the returned address is part of the jail. */ 333 if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) { 334 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 335 return (0); 336 } 337 338 switch (info->rti_info[RTAX_DST]->sa_family) { 339 #ifdef INET 340 case AF_INET: 341 { 342 struct in_addr ia; 343 struct ifaddr *ifa; 344 int found; 345 346 found = 0; 347 /* 348 * Try to find an address on the given outgoing interface 349 * that belongs to the jail. 350 */ 351 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 352 struct sockaddr *sa; 353 sa = ifa->ifa_addr; 354 if (sa->sa_family != AF_INET) 355 continue; 356 ia = ((struct sockaddr_in *)sa)->sin_addr; 357 if (prison_check_ip4(cred, &ia) == 0) { 358 found = 1; 359 break; 360 } 361 } 362 if (!found) { 363 /* 364 * As a last resort return the 'default' jail address. 365 */ 366 if (prison_get_ip4(cred, &ia) != 0) 367 return (ESRCH); 368 } 369 bzero(&saun->sin, sizeof(struct sockaddr_in)); 370 saun->sin.sin_len = sizeof(struct sockaddr_in); 371 saun->sin.sin_family = AF_INET; 372 saun->sin.sin_addr.s_addr = ia.s_addr; 373 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin; 374 break; 375 } 376 #endif 377 #ifdef INET6 378 case AF_INET6: 379 { 380 struct in6_addr ia6; 381 struct ifaddr *ifa; 382 int found; 383 384 found = 0; 385 /* 386 * Try to find an address on the given outgoing interface 387 * that belongs to the jail. 388 */ 389 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 390 struct sockaddr *sa; 391 sa = ifa->ifa_addr; 392 if (sa->sa_family != AF_INET6) 393 continue; 394 bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr, 395 &ia6, sizeof(struct in6_addr)); 396 if (prison_check_ip6(cred, &ia6) == 0) { 397 found = 1; 398 break; 399 } 400 } 401 if (!found) { 402 /* 403 * As a last resort return the 'default' jail address. 404 */ 405 if (prison_get_ip6(cred, &ia6) != 0) 406 return (ESRCH); 407 } 408 bzero(&saun->sin6, sizeof(struct sockaddr_in6)); 409 saun->sin6.sin6_len = sizeof(struct sockaddr_in6); 410 saun->sin6.sin6_family = AF_INET6; 411 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr)); 412 if (sa6_recoverscope(&saun->sin6) != 0) 413 return (ESRCH); 414 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6; 415 break; 416 } 417 #endif 418 default: 419 return (ESRCH); 420 } 421 return (0); 422 } 423 424 /*ARGSUSED*/ 425 static int 426 route_output(struct mbuf *m, struct socket *so) 427 { 428 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0) 429 struct rt_msghdr *rtm = NULL; 430 struct rtentry *rt = NULL; 431 struct radix_node_head *rnh; 432 struct rt_addrinfo info; 433 int len, error = 0; 434 struct ifnet *ifp = NULL; 435 union sockaddr_union saun; 436 437 #define senderr(e) { error = e; goto flush;} 438 if (m == NULL || ((m->m_len < sizeof(long)) && 439 (m = m_pullup(m, sizeof(long))) == NULL)) 440 return (ENOBUFS); 441 if ((m->m_flags & M_PKTHDR) == 0) 442 panic("route_output"); 443 len = m->m_pkthdr.len; 444 if (len < sizeof(*rtm) || 445 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 446 info.rti_info[RTAX_DST] = NULL; 447 senderr(EINVAL); 448 } 449 R_Malloc(rtm, struct rt_msghdr *, len); 450 if (rtm == NULL) { 451 info.rti_info[RTAX_DST] = NULL; 452 senderr(ENOBUFS); 453 } 454 m_copydata(m, 0, len, (caddr_t)rtm); 455 if (rtm->rtm_version != RTM_VERSION) { 456 info.rti_info[RTAX_DST] = NULL; 457 senderr(EPROTONOSUPPORT); 458 } 459 rtm->rtm_pid = curproc->p_pid; 460 bzero(&info, sizeof(info)); 461 info.rti_addrs = rtm->rtm_addrs; 462 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { 463 info.rti_info[RTAX_DST] = NULL; 464 senderr(EINVAL); 465 } 466 info.rti_flags = rtm->rtm_flags; 467 if (info.rti_info[RTAX_DST] == NULL || 468 info.rti_info[RTAX_DST]->sa_family >= AF_MAX || 469 (info.rti_info[RTAX_GATEWAY] != NULL && 470 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) 471 senderr(EINVAL); 472 if (info.rti_info[RTAX_GENMASK]) { 473 struct radix_node *t; 474 t = rn_addmask((caddr_t) info.rti_info[RTAX_GENMASK], 0, 1); 475 if (t != NULL && 476 bcmp((char *)(void *)info.rti_info[RTAX_GENMASK] + 1, 477 (char *)(void *)t->rn_key + 1, 478 ((struct sockaddr *)t->rn_key)->sa_len - 1) == 0) 479 info.rti_info[RTAX_GENMASK] = 480 (struct sockaddr *)t->rn_key; 481 else 482 senderr(ENOBUFS); 483 } 484 485 /* 486 * Verify that the caller has the appropriate privilege; RTM_GET 487 * is the only operation the non-superuser is allowed. 488 */ 489 if (rtm->rtm_type != RTM_GET) { 490 error = priv_check(curthread, PRIV_NET_ROUTE); 491 if (error) 492 senderr(error); 493 } 494 495 switch (rtm->rtm_type) { 496 struct rtentry *saved_nrt; 497 498 case RTM_ADD: 499 if (info.rti_info[RTAX_GATEWAY] == NULL) 500 senderr(EINVAL); 501 saved_nrt = NULL; 502 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt, 503 so->so_fibnum); 504 if (error == 0 && saved_nrt) { 505 RT_LOCK(saved_nrt); 506 rt_setmetrics(rtm->rtm_inits, 507 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 508 rtm->rtm_index = saved_nrt->rt_ifp->if_index; 509 RT_REMREF(saved_nrt); 510 saved_nrt->rt_genmask = info.rti_info[RTAX_GENMASK]; 511 RT_UNLOCK(saved_nrt); 512 } 513 break; 514 515 case RTM_DELETE: 516 saved_nrt = NULL; 517 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, 518 so->so_fibnum); 519 if (error == 0) { 520 RT_LOCK(saved_nrt); 521 rt = saved_nrt; 522 goto report; 523 } 524 break; 525 526 case RTM_GET: 527 case RTM_CHANGE: 528 case RTM_LOCK: 529 rnh = rt_tables[so->so_fibnum][info.rti_info[RTAX_DST]->sa_family]; 530 if (rnh == NULL) 531 senderr(EAFNOSUPPORT); 532 RADIX_NODE_HEAD_LOCK(rnh); 533 rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST], 534 info.rti_info[RTAX_NETMASK], rnh); 535 if (rt == NULL) { /* XXX looks bogus */ 536 RADIX_NODE_HEAD_UNLOCK(rnh); 537 senderr(ESRCH); 538 } 539 RT_LOCK(rt); 540 RT_ADDREF(rt); 541 RADIX_NODE_HEAD_UNLOCK(rnh); 542 543 /* 544 * Fix for PR: 82974 545 * 546 * RTM_CHANGE/LOCK need a perfect match, rn_lookup() 547 * returns a perfect match in case a netmask is 548 * specified. For host routes only a longest prefix 549 * match is returned so it is necessary to compare the 550 * existence of the netmask. If both have a netmask 551 * rnh_lookup() did a perfect match and if none of them 552 * have a netmask both are host routes which is also a 553 * perfect match. 554 */ 555 556 if (rtm->rtm_type != RTM_GET && 557 (!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) { 558 RT_UNLOCK(rt); 559 senderr(ESRCH); 560 } 561 562 switch(rtm->rtm_type) { 563 564 case RTM_GET: 565 report: 566 RT_LOCK_ASSERT(rt); 567 if ((rt->rt_flags & RTF_HOST) == 0 568 ? jailed(curthread->td_ucred) 569 : prison_if(curthread->td_ucred, 570 rt_key(rt)) != 0) { 571 RT_UNLOCK(rt); 572 senderr(ESRCH); 573 } 574 info.rti_info[RTAX_DST] = rt_key(rt); 575 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 576 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 577 info.rti_info[RTAX_GENMASK] = rt->rt_genmask; 578 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 579 ifp = rt->rt_ifp; 580 if (ifp) { 581 info.rti_info[RTAX_IFP] = 582 ifp->if_addr->ifa_addr; 583 error = rtm_get_jailed(&info, ifp, rt, 584 &saun, curthread->td_ucred); 585 if (error != 0) { 586 RT_UNLOCK(rt); 587 senderr(error); 588 } 589 if (ifp->if_flags & IFF_POINTOPOINT) 590 info.rti_info[RTAX_BRD] = 591 rt->rt_ifa->ifa_dstaddr; 592 rtm->rtm_index = ifp->if_index; 593 } else { 594 info.rti_info[RTAX_IFP] = NULL; 595 info.rti_info[RTAX_IFA] = NULL; 596 } 597 } else if ((ifp = rt->rt_ifp) != NULL) { 598 rtm->rtm_index = ifp->if_index; 599 } 600 len = rt_msg2(rtm->rtm_type, &info, NULL, NULL); 601 if (len > rtm->rtm_msglen) { 602 struct rt_msghdr *new_rtm; 603 R_Malloc(new_rtm, struct rt_msghdr *, len); 604 if (new_rtm == NULL) { 605 RT_UNLOCK(rt); 606 senderr(ENOBUFS); 607 } 608 bcopy(rtm, new_rtm, rtm->rtm_msglen); 609 Free(rtm); rtm = new_rtm; 610 } 611 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL); 612 rtm->rtm_flags = rt->rt_flags; 613 rtm->rtm_use = 0; 614 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx); 615 rtm->rtm_addrs = info.rti_addrs; 616 break; 617 618 case RTM_CHANGE: 619 /* 620 * New gateway could require new ifaddr, ifp; 621 * flags may also be different; ifp may be specified 622 * by ll sockaddr when protocol address is ambiguous 623 */ 624 if (((rt->rt_flags & RTF_GATEWAY) && 625 info.rti_info[RTAX_GATEWAY] != NULL) || 626 info.rti_info[RTAX_IFP] != NULL || 627 (info.rti_info[RTAX_IFA] != NULL && 628 !sa_equal(info.rti_info[RTAX_IFA], 629 rt->rt_ifa->ifa_addr))) { 630 RT_UNLOCK(rt); 631 RADIX_NODE_HEAD_LOCK(rnh); 632 error = rt_getifa_fib(&info, rt->rt_fibnum); 633 RADIX_NODE_HEAD_UNLOCK(rnh); 634 if (error != 0) 635 senderr(error); 636 RT_LOCK(rt); 637 } 638 if (info.rti_ifa != NULL && 639 info.rti_ifa != rt->rt_ifa && 640 rt->rt_ifa != NULL && 641 rt->rt_ifa->ifa_rtrequest != NULL) { 642 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, 643 &info); 644 IFAFREE(rt->rt_ifa); 645 } 646 if (info.rti_info[RTAX_GATEWAY] != NULL) { 647 RT_UNLOCK(rt); 648 RADIX_NODE_HEAD_LOCK(rnh); 649 RT_LOCK(rt); 650 651 error = rt_setgate(rt, rt_key(rt), 652 info.rti_info[RTAX_GATEWAY]); 653 RADIX_NODE_HEAD_UNLOCK(rnh); 654 if (error != 0) { 655 RT_UNLOCK(rt); 656 senderr(error); 657 } 658 if (!(rt->rt_flags & RTF_LLINFO)) 659 rt->rt_flags |= RTF_GATEWAY; 660 } 661 if (info.rti_ifa != NULL && 662 info.rti_ifa != rt->rt_ifa) { 663 IFAREF(info.rti_ifa); 664 rt->rt_ifa = info.rti_ifa; 665 rt->rt_ifp = info.rti_ifp; 666 } 667 /* Allow some flags to be toggled on change. */ 668 if (rtm->rtm_fmask & RTF_FMASK) 669 rt->rt_flags = (rt->rt_flags & 670 ~rtm->rtm_fmask) | 671 (rtm->rtm_flags & rtm->rtm_fmask); 672 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 673 &rt->rt_rmx); 674 rtm->rtm_index = rt->rt_ifp->if_index; 675 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 676 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 677 if (info.rti_info[RTAX_GENMASK]) 678 rt->rt_genmask = info.rti_info[RTAX_GENMASK]; 679 /* FALLTHROUGH */ 680 case RTM_LOCK: 681 /* We don't support locks anymore */ 682 break; 683 } 684 RT_UNLOCK(rt); 685 break; 686 687 default: 688 senderr(EOPNOTSUPP); 689 } 690 691 flush: 692 if (rtm) { 693 if (error) 694 rtm->rtm_errno = error; 695 else 696 rtm->rtm_flags |= RTF_DONE; 697 } 698 if (rt) /* XXX can this be true? */ 699 RTFREE(rt); 700 { 701 struct rawcb *rp = NULL; 702 /* 703 * Check to see if we don't want our own messages. 704 */ 705 if ((so->so_options & SO_USELOOPBACK) == 0) { 706 if (route_cb.any_count <= 1) { 707 if (rtm) 708 Free(rtm); 709 m_freem(m); 710 return (error); 711 } 712 /* There is another listener, so construct message */ 713 rp = sotorawcb(so); 714 } 715 if (rtm) { 716 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 717 if (m->m_pkthdr.len < rtm->rtm_msglen) { 718 m_freem(m); 719 m = NULL; 720 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 721 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 722 Free(rtm); 723 } 724 if (m) { 725 if (rp) { 726 /* 727 * XXX insure we don't get a copy by 728 * invalidating our protocol 729 */ 730 unsigned short family = rp->rcb_proto.sp_family; 731 rp->rcb_proto.sp_family = 0; 732 rt_dispatch(m, info.rti_info[RTAX_DST]); 733 rp->rcb_proto.sp_family = family; 734 } else 735 rt_dispatch(m, info.rti_info[RTAX_DST]); 736 } 737 } 738 return (error); 739 #undef sa_equal 740 } 741 742 static void 743 rt_setmetrics(u_long which, const struct rt_metrics *in, 744 struct rt_metrics_lite *out) 745 { 746 #define metric(f, e) if (which & (f)) out->e = in->e; 747 /* 748 * Only these are stored in the routing entry since introduction 749 * of tcp hostcache. The rest is ignored. 750 */ 751 metric(RTV_MTU, rmx_mtu); 752 /* Userland -> kernel timebase conversion. */ 753 if (which & RTV_EXPIRE) 754 out->rmx_expire = in->rmx_expire ? 755 in->rmx_expire - time_second + time_uptime : 0; 756 #undef metric 757 } 758 759 static void 760 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out) 761 { 762 #define metric(e) out->e = in->e; 763 bzero(out, sizeof(*out)); 764 metric(rmx_mtu); 765 /* Kernel -> userland timebase conversion. */ 766 out->rmx_expire = in->rmx_expire ? 767 in->rmx_expire - time_uptime + time_second : 0; 768 #undef metric 769 } 770 771 /* 772 * Extract the addresses of the passed sockaddrs. 773 * Do a little sanity checking so as to avoid bad memory references. 774 * This data is derived straight from userland. 775 */ 776 static int 777 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 778 { 779 struct sockaddr *sa; 780 int i; 781 782 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 783 if ((rtinfo->rti_addrs & (1 << i)) == 0) 784 continue; 785 sa = (struct sockaddr *)cp; 786 /* 787 * It won't fit. 788 */ 789 if (cp + sa->sa_len > cplim) 790 return (EINVAL); 791 /* 792 * there are no more.. quit now 793 * If there are more bits, they are in error. 794 * I've seen this. route(1) can evidently generate these. 795 * This causes kernel to core dump. 796 * for compatibility, If we see this, point to a safe address. 797 */ 798 if (sa->sa_len == 0) { 799 rtinfo->rti_info[i] = &sa_zero; 800 return (0); /* should be EINVAL but for compat */ 801 } 802 /* accept it */ 803 rtinfo->rti_info[i] = sa; 804 cp += SA_SIZE(sa); 805 } 806 return (0); 807 } 808 809 static struct mbuf * 810 rt_msg1(int type, struct rt_addrinfo *rtinfo) 811 { 812 struct rt_msghdr *rtm; 813 struct mbuf *m; 814 int i; 815 struct sockaddr *sa; 816 int len, dlen; 817 818 switch (type) { 819 820 case RTM_DELADDR: 821 case RTM_NEWADDR: 822 len = sizeof(struct ifa_msghdr); 823 break; 824 825 case RTM_DELMADDR: 826 case RTM_NEWMADDR: 827 len = sizeof(struct ifma_msghdr); 828 break; 829 830 case RTM_IFINFO: 831 len = sizeof(struct if_msghdr); 832 break; 833 834 case RTM_IFANNOUNCE: 835 case RTM_IEEE80211: 836 len = sizeof(struct if_announcemsghdr); 837 break; 838 839 default: 840 len = sizeof(struct rt_msghdr); 841 } 842 if (len > MCLBYTES) 843 panic("rt_msg1"); 844 m = m_gethdr(M_DONTWAIT, MT_DATA); 845 if (m && len > MHLEN) { 846 MCLGET(m, M_DONTWAIT); 847 if ((m->m_flags & M_EXT) == 0) { 848 m_free(m); 849 m = NULL; 850 } 851 } 852 if (m == NULL) 853 return (m); 854 m->m_pkthdr.len = m->m_len = len; 855 m->m_pkthdr.rcvif = NULL; 856 rtm = mtod(m, struct rt_msghdr *); 857 bzero((caddr_t)rtm, len); 858 for (i = 0; i < RTAX_MAX; i++) { 859 if ((sa = rtinfo->rti_info[i]) == NULL) 860 continue; 861 rtinfo->rti_addrs |= (1 << i); 862 dlen = SA_SIZE(sa); 863 m_copyback(m, len, dlen, (caddr_t)sa); 864 len += dlen; 865 } 866 if (m->m_pkthdr.len != len) { 867 m_freem(m); 868 return (NULL); 869 } 870 rtm->rtm_msglen = len; 871 rtm->rtm_version = RTM_VERSION; 872 rtm->rtm_type = type; 873 return (m); 874 } 875 876 static int 877 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w) 878 { 879 int i; 880 int len, dlen, second_time = 0; 881 caddr_t cp0; 882 883 rtinfo->rti_addrs = 0; 884 again: 885 switch (type) { 886 887 case RTM_DELADDR: 888 case RTM_NEWADDR: 889 len = sizeof(struct ifa_msghdr); 890 break; 891 892 case RTM_IFINFO: 893 len = sizeof(struct if_msghdr); 894 break; 895 896 case RTM_NEWMADDR: 897 len = sizeof(struct ifma_msghdr); 898 break; 899 900 default: 901 len = sizeof(struct rt_msghdr); 902 } 903 cp0 = cp; 904 if (cp0) 905 cp += len; 906 for (i = 0; i < RTAX_MAX; i++) { 907 struct sockaddr *sa; 908 909 if ((sa = rtinfo->rti_info[i]) == NULL) 910 continue; 911 rtinfo->rti_addrs |= (1 << i); 912 dlen = SA_SIZE(sa); 913 if (cp) { 914 bcopy((caddr_t)sa, cp, (unsigned)dlen); 915 cp += dlen; 916 } 917 len += dlen; 918 } 919 len = ALIGN(len); 920 if (cp == NULL && w != NULL && !second_time) { 921 struct walkarg *rw = w; 922 923 if (rw->w_req) { 924 if (rw->w_tmemsize < len) { 925 if (rw->w_tmem) 926 free(rw->w_tmem, M_RTABLE); 927 rw->w_tmem = (caddr_t) 928 malloc(len, M_RTABLE, M_NOWAIT); 929 if (rw->w_tmem) 930 rw->w_tmemsize = len; 931 } 932 if (rw->w_tmem) { 933 cp = rw->w_tmem; 934 second_time = 1; 935 goto again; 936 } 937 } 938 } 939 if (cp) { 940 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 941 942 rtm->rtm_version = RTM_VERSION; 943 rtm->rtm_type = type; 944 rtm->rtm_msglen = len; 945 } 946 return (len); 947 } 948 949 /* 950 * This routine is called to generate a message from the routing 951 * socket indicating that a redirect has occured, a routing lookup 952 * has failed, or that a protocol has detected timeouts to a particular 953 * destination. 954 */ 955 void 956 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 957 { 958 struct rt_msghdr *rtm; 959 struct mbuf *m; 960 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 961 962 if (route_cb.any_count == 0) 963 return; 964 m = rt_msg1(type, rtinfo); 965 if (m == NULL) 966 return; 967 rtm = mtod(m, struct rt_msghdr *); 968 rtm->rtm_flags = RTF_DONE | flags; 969 rtm->rtm_errno = error; 970 rtm->rtm_addrs = rtinfo->rti_addrs; 971 rt_dispatch(m, sa); 972 } 973 974 /* 975 * This routine is called to generate a message from the routing 976 * socket indicating that the status of a network interface has changed. 977 */ 978 void 979 rt_ifmsg(struct ifnet *ifp) 980 { 981 struct if_msghdr *ifm; 982 struct mbuf *m; 983 struct rt_addrinfo info; 984 985 if (route_cb.any_count == 0) 986 return; 987 bzero((caddr_t)&info, sizeof(info)); 988 m = rt_msg1(RTM_IFINFO, &info); 989 if (m == NULL) 990 return; 991 ifm = mtod(m, struct if_msghdr *); 992 ifm->ifm_index = ifp->if_index; 993 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 994 ifm->ifm_data = ifp->if_data; 995 ifm->ifm_addrs = 0; 996 rt_dispatch(m, NULL); 997 } 998 999 /* 1000 * This is called to generate messages from the routing socket 1001 * indicating a network interface has had addresses associated with it. 1002 * if we ever reverse the logic and replace messages TO the routing 1003 * socket indicate a request to configure interfaces, then it will 1004 * be unnecessary as the routing socket will automatically generate 1005 * copies of it. 1006 */ 1007 void 1008 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1009 { 1010 struct rt_addrinfo info; 1011 struct sockaddr *sa = NULL; 1012 int pass; 1013 struct mbuf *m = NULL; 1014 struct ifnet *ifp = ifa->ifa_ifp; 1015 1016 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 1017 ("unexpected cmd %u", cmd)); 1018 #ifdef SCTP 1019 /* 1020 * notify the SCTP stack 1021 * this will only get called when an address is added/deleted 1022 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1023 */ 1024 sctp_addr_change(ifa, cmd); 1025 #endif /* SCTP */ 1026 if (route_cb.any_count == 0) 1027 return; 1028 for (pass = 1; pass < 3; pass++) { 1029 bzero((caddr_t)&info, sizeof(info)); 1030 if ((cmd == RTM_ADD && pass == 1) || 1031 (cmd == RTM_DELETE && pass == 2)) { 1032 struct ifa_msghdr *ifam; 1033 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 1034 1035 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1036 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 1037 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1038 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1039 if ((m = rt_msg1(ncmd, &info)) == NULL) 1040 continue; 1041 ifam = mtod(m, struct ifa_msghdr *); 1042 ifam->ifam_index = ifp->if_index; 1043 ifam->ifam_metric = ifa->ifa_metric; 1044 ifam->ifam_flags = ifa->ifa_flags; 1045 ifam->ifam_addrs = info.rti_addrs; 1046 } 1047 if ((cmd == RTM_ADD && pass == 2) || 1048 (cmd == RTM_DELETE && pass == 1)) { 1049 struct rt_msghdr *rtm; 1050 1051 if (rt == NULL) 1052 continue; 1053 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1054 info.rti_info[RTAX_DST] = sa = rt_key(rt); 1055 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1056 if ((m = rt_msg1(cmd, &info)) == NULL) 1057 continue; 1058 rtm = mtod(m, struct rt_msghdr *); 1059 rtm->rtm_index = ifp->if_index; 1060 rtm->rtm_flags |= rt->rt_flags; 1061 rtm->rtm_errno = error; 1062 rtm->rtm_addrs = info.rti_addrs; 1063 } 1064 rt_dispatch(m, sa); 1065 } 1066 } 1067 1068 /* 1069 * This is the analogue to the rt_newaddrmsg which performs the same 1070 * function but for multicast group memberhips. This is easier since 1071 * there is no route state to worry about. 1072 */ 1073 void 1074 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1075 { 1076 struct rt_addrinfo info; 1077 struct mbuf *m = NULL; 1078 struct ifnet *ifp = ifma->ifma_ifp; 1079 struct ifma_msghdr *ifmam; 1080 1081 if (route_cb.any_count == 0) 1082 return; 1083 1084 bzero((caddr_t)&info, sizeof(info)); 1085 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1086 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL; 1087 /* 1088 * If a link-layer address is present, present it as a ``gateway'' 1089 * (similarly to how ARP entries, e.g., are presented). 1090 */ 1091 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr; 1092 m = rt_msg1(cmd, &info); 1093 if (m == NULL) 1094 return; 1095 ifmam = mtod(m, struct ifma_msghdr *); 1096 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n", 1097 __func__)); 1098 ifmam->ifmam_index = ifp->if_index; 1099 ifmam->ifmam_addrs = info.rti_addrs; 1100 rt_dispatch(m, ifma->ifma_addr); 1101 } 1102 1103 static struct mbuf * 1104 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1105 struct rt_addrinfo *info) 1106 { 1107 struct if_announcemsghdr *ifan; 1108 struct mbuf *m; 1109 1110 if (route_cb.any_count == 0) 1111 return NULL; 1112 bzero((caddr_t)info, sizeof(*info)); 1113 m = rt_msg1(type, info); 1114 if (m != NULL) { 1115 ifan = mtod(m, struct if_announcemsghdr *); 1116 ifan->ifan_index = ifp->if_index; 1117 strlcpy(ifan->ifan_name, ifp->if_xname, 1118 sizeof(ifan->ifan_name)); 1119 ifan->ifan_what = what; 1120 } 1121 return m; 1122 } 1123 1124 /* 1125 * This is called to generate routing socket messages indicating 1126 * IEEE80211 wireless events. 1127 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1128 */ 1129 void 1130 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1131 { 1132 struct mbuf *m; 1133 struct rt_addrinfo info; 1134 1135 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1136 if (m != NULL) { 1137 /* 1138 * Append the ieee80211 data. Try to stick it in the 1139 * mbuf containing the ifannounce msg; otherwise allocate 1140 * a new mbuf and append. 1141 * 1142 * NB: we assume m is a single mbuf. 1143 */ 1144 if (data_len > M_TRAILINGSPACE(m)) { 1145 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1146 if (n == NULL) { 1147 m_freem(m); 1148 return; 1149 } 1150 bcopy(data, mtod(n, void *), data_len); 1151 n->m_len = data_len; 1152 m->m_next = n; 1153 } else if (data_len > 0) { 1154 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1155 m->m_len += data_len; 1156 } 1157 if (m->m_flags & M_PKTHDR) 1158 m->m_pkthdr.len += data_len; 1159 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1160 rt_dispatch(m, NULL); 1161 } 1162 } 1163 1164 /* 1165 * This is called to generate routing socket messages indicating 1166 * network interface arrival and departure. 1167 */ 1168 void 1169 rt_ifannouncemsg(struct ifnet *ifp, int what) 1170 { 1171 struct mbuf *m; 1172 struct rt_addrinfo info; 1173 1174 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1175 if (m != NULL) 1176 rt_dispatch(m, NULL); 1177 } 1178 1179 static void 1180 rt_dispatch(struct mbuf *m, const struct sockaddr *sa) 1181 { 1182 struct m_tag *tag; 1183 1184 /* 1185 * Preserve the family from the sockaddr, if any, in an m_tag for 1186 * use when injecting the mbuf into the routing socket buffer from 1187 * the netisr. 1188 */ 1189 if (sa != NULL) { 1190 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short), 1191 M_NOWAIT); 1192 if (tag == NULL) { 1193 m_freem(m); 1194 return; 1195 } 1196 *(unsigned short *)(tag + 1) = sa->sa_family; 1197 m_tag_prepend(m, tag); 1198 } 1199 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */ 1200 } 1201 1202 /* 1203 * This is used in dumping the kernel table via sysctl(). 1204 */ 1205 static int 1206 sysctl_dumpentry(struct radix_node *rn, void *vw) 1207 { 1208 struct walkarg *w = vw; 1209 struct rtentry *rt = (struct rtentry *)rn; 1210 int error = 0, size; 1211 struct rt_addrinfo info; 1212 1213 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1214 return 0; 1215 if ((rt->rt_flags & RTF_HOST) == 0 1216 ? jailed(w->w_req->td->td_ucred) 1217 : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0) 1218 return (0); 1219 bzero((caddr_t)&info, sizeof(info)); 1220 info.rti_info[RTAX_DST] = rt_key(rt); 1221 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1222 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1223 info.rti_info[RTAX_GENMASK] = rt->rt_genmask; 1224 if (rt->rt_ifp) { 1225 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr; 1226 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1227 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1228 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr; 1229 } 1230 size = rt_msg2(RTM_GET, &info, NULL, w); 1231 if (w->w_req && w->w_tmem) { 1232 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 1233 1234 rtm->rtm_flags = rt->rt_flags; 1235 rtm->rtm_use = rt->rt_rmx.rmx_pksent; 1236 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx); 1237 rtm->rtm_index = rt->rt_ifp->if_index; 1238 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1239 rtm->rtm_addrs = info.rti_addrs; 1240 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 1241 return (error); 1242 } 1243 return (error); 1244 } 1245 1246 static int 1247 sysctl_iflist(int af, struct walkarg *w) 1248 { 1249 struct ifnet *ifp; 1250 struct ifaddr *ifa; 1251 struct rt_addrinfo info; 1252 int len, error = 0; 1253 1254 bzero((caddr_t)&info, sizeof(info)); 1255 IFNET_RLOCK(); 1256 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1257 if (w->w_arg && w->w_arg != ifp->if_index) 1258 continue; 1259 ifa = ifp->if_addr; 1260 info.rti_info[RTAX_IFP] = ifa->ifa_addr; 1261 len = rt_msg2(RTM_IFINFO, &info, NULL, w); 1262 info.rti_info[RTAX_IFP] = NULL; 1263 if (w->w_req && w->w_tmem) { 1264 struct if_msghdr *ifm; 1265 1266 ifm = (struct if_msghdr *)w->w_tmem; 1267 ifm->ifm_index = ifp->if_index; 1268 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1269 ifm->ifm_data = ifp->if_data; 1270 ifm->ifm_addrs = info.rti_addrs; 1271 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 1272 if (error) 1273 goto done; 1274 } 1275 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1276 if (af && af != ifa->ifa_addr->sa_family) 1277 continue; 1278 if (prison_if(w->w_req->td->td_ucred, 1279 ifa->ifa_addr) != 0) 1280 continue; 1281 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1282 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1283 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1284 len = rt_msg2(RTM_NEWADDR, &info, NULL, w); 1285 if (w->w_req && w->w_tmem) { 1286 struct ifa_msghdr *ifam; 1287 1288 ifam = (struct ifa_msghdr *)w->w_tmem; 1289 ifam->ifam_index = ifa->ifa_ifp->if_index; 1290 ifam->ifam_flags = ifa->ifa_flags; 1291 ifam->ifam_metric = ifa->ifa_metric; 1292 ifam->ifam_addrs = info.rti_addrs; 1293 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1294 if (error) 1295 goto done; 1296 } 1297 } 1298 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1299 info.rti_info[RTAX_BRD] = NULL; 1300 } 1301 done: 1302 IFNET_RUNLOCK(); 1303 return (error); 1304 } 1305 1306 static int 1307 sysctl_ifmalist(int af, struct walkarg *w) 1308 { 1309 struct ifnet *ifp; 1310 struct ifmultiaddr *ifma; 1311 struct rt_addrinfo info; 1312 int len, error = 0; 1313 struct ifaddr *ifa; 1314 1315 bzero((caddr_t)&info, sizeof(info)); 1316 IFNET_RLOCK(); 1317 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1318 if (w->w_arg && w->w_arg != ifp->if_index) 1319 continue; 1320 ifa = ifp->if_addr; 1321 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL; 1322 IF_ADDR_LOCK(ifp); 1323 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1324 if (af && af != ifma->ifma_addr->sa_family) 1325 continue; 1326 if (prison_if(w->w_req->td->td_ucred, 1327 ifma->ifma_addr) != 0) 1328 continue; 1329 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1330 info.rti_info[RTAX_GATEWAY] = 1331 (ifma->ifma_addr->sa_family != AF_LINK) ? 1332 ifma->ifma_lladdr : NULL; 1333 len = rt_msg2(RTM_NEWMADDR, &info, NULL, w); 1334 if (w->w_req && w->w_tmem) { 1335 struct ifma_msghdr *ifmam; 1336 1337 ifmam = (struct ifma_msghdr *)w->w_tmem; 1338 ifmam->ifmam_index = ifma->ifma_ifp->if_index; 1339 ifmam->ifmam_flags = 0; 1340 ifmam->ifmam_addrs = info.rti_addrs; 1341 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1342 if (error) { 1343 IF_ADDR_UNLOCK(ifp); 1344 goto done; 1345 } 1346 } 1347 } 1348 IF_ADDR_UNLOCK(ifp); 1349 } 1350 done: 1351 IFNET_RUNLOCK(); 1352 return (error); 1353 } 1354 1355 static int 1356 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1357 { 1358 int *name = (int *)arg1; 1359 u_int namelen = arg2; 1360 struct radix_node_head *rnh; 1361 int i, lim, error = EINVAL; 1362 u_char af; 1363 struct walkarg w; 1364 1365 name ++; 1366 namelen--; 1367 if (req->newptr) 1368 return (EPERM); 1369 if (namelen != 3) 1370 return ((namelen < 3) ? EISDIR : ENOTDIR); 1371 af = name[0]; 1372 if (af > AF_MAX) 1373 return (EINVAL); 1374 bzero(&w, sizeof(w)); 1375 w.w_op = name[1]; 1376 w.w_arg = name[2]; 1377 w.w_req = req; 1378 1379 error = sysctl_wire_old_buffer(req, 0); 1380 if (error) 1381 return (error); 1382 switch (w.w_op) { 1383 1384 case NET_RT_DUMP: 1385 case NET_RT_FLAGS: 1386 if (af == 0) { /* dump all tables */ 1387 i = 1; 1388 lim = AF_MAX; 1389 } else /* dump only one table */ 1390 i = lim = af; 1391 for (error = 0; error == 0 && i <= lim; i++) 1392 if ((rnh = rt_tables[req->td->td_proc->p_fibnum][i]) != NULL) { 1393 RADIX_NODE_HEAD_LOCK(rnh); 1394 error = rnh->rnh_walktree(rnh, 1395 sysctl_dumpentry, &w); 1396 RADIX_NODE_HEAD_UNLOCK(rnh); 1397 } else if (af != 0) 1398 error = EAFNOSUPPORT; 1399 break; 1400 1401 case NET_RT_IFLIST: 1402 error = sysctl_iflist(af, &w); 1403 break; 1404 1405 case NET_RT_IFMALIST: 1406 error = sysctl_ifmalist(af, &w); 1407 break; 1408 } 1409 if (w.w_tmem) 1410 free(w.w_tmem, M_RTABLE); 1411 return (error); 1412 } 1413 1414 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1415 1416 /* 1417 * Definitions of protocols supported in the ROUTE domain. 1418 */ 1419 1420 static struct domain routedomain; /* or at least forward */ 1421 1422 static struct protosw routesw[] = { 1423 { 1424 .pr_type = SOCK_RAW, 1425 .pr_domain = &routedomain, 1426 .pr_flags = PR_ATOMIC|PR_ADDR, 1427 .pr_output = route_output, 1428 .pr_ctlinput = raw_ctlinput, 1429 .pr_init = raw_init, 1430 .pr_usrreqs = &route_usrreqs 1431 } 1432 }; 1433 1434 static struct domain routedomain = { 1435 .dom_family = PF_ROUTE, 1436 .dom_name = "route", 1437 .dom_protosw = routesw, 1438 .dom_protoswNPROTOSW = &routesw[sizeof(routesw)/sizeof(routesw[0])] 1439 }; 1440 1441 DOMAIN_SET(route);
Cache object: d9a2d4f5e71a8a4144c7d047acfdcd18
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