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 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1991, 1993 5 * The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 32 * $FreeBSD$ 33 */ 34 #include "opt_mpath.h" 35 #include "opt_inet.h" 36 #include "opt_inet6.h" 37 38 #include <sys/param.h> 39 #include <sys/jail.h> 40 #include <sys/kernel.h> 41 #include <sys/domain.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/protosw.h> 48 #include <sys/rmlock.h> 49 #include <sys/rwlock.h> 50 #include <sys/signalvar.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/sysctl.h> 54 #include <sys/systm.h> 55 56 #include <net/if.h> 57 #include <net/if_var.h> 58 #include <net/if_dl.h> 59 #include <net/if_llatbl.h> 60 #include <net/if_types.h> 61 #include <net/netisr.h> 62 #include <net/raw_cb.h> 63 #include <net/route.h> 64 #include <net/route_var.h> 65 #include <net/vnet.h> 66 67 #include <netinet/in.h> 68 #include <netinet/if_ether.h> 69 #include <netinet/ip_carp.h> 70 #ifdef INET6 71 #include <netinet6/ip6_var.h> 72 #include <netinet6/scope6_var.h> 73 #endif 74 75 #ifdef COMPAT_FREEBSD32 76 #include <sys/mount.h> 77 #include <compat/freebsd32/freebsd32.h> 78 79 struct if_msghdr32 { 80 uint16_t ifm_msglen; 81 uint8_t ifm_version; 82 uint8_t ifm_type; 83 int32_t ifm_addrs; 84 int32_t ifm_flags; 85 uint16_t ifm_index; 86 uint16_t _ifm_spare1; 87 struct if_data ifm_data; 88 }; 89 90 struct if_msghdrl32 { 91 uint16_t ifm_msglen; 92 uint8_t ifm_version; 93 uint8_t ifm_type; 94 int32_t ifm_addrs; 95 int32_t ifm_flags; 96 uint16_t ifm_index; 97 uint16_t _ifm_spare1; 98 uint16_t ifm_len; 99 uint16_t ifm_data_off; 100 uint32_t _ifm_spare2; 101 struct if_data ifm_data; 102 }; 103 104 struct ifa_msghdrl32 { 105 uint16_t ifam_msglen; 106 uint8_t ifam_version; 107 uint8_t ifam_type; 108 int32_t ifam_addrs; 109 int32_t ifam_flags; 110 uint16_t ifam_index; 111 uint16_t _ifam_spare1; 112 uint16_t ifam_len; 113 uint16_t ifam_data_off; 114 int32_t ifam_metric; 115 struct if_data ifam_data; 116 }; 117 118 #define SA_SIZE32(sa) \ 119 ( (((struct sockaddr *)(sa))->sa_len == 0) ? \ 120 sizeof(int) : \ 121 1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(int) - 1) ) ) 122 123 #endif /* COMPAT_FREEBSD32 */ 124 125 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 126 127 /* NB: these are not modified */ 128 static struct sockaddr route_src = { 2, PF_ROUTE, }; 129 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 130 131 /* These are external hooks for CARP. */ 132 int (*carp_get_vhid_p)(struct ifaddr *); 133 134 /* 135 * Used by rtsock/raw_input callback code to decide whether to filter the update 136 * notification to a socket bound to a particular FIB. 137 */ 138 #define RTS_FILTER_FIB M_PROTO8 139 140 typedef struct { 141 int ip_count; /* attached w/ AF_INET */ 142 int ip6_count; /* attached w/ AF_INET6 */ 143 int any_count; /* total attached */ 144 } route_cb_t; 145 VNET_DEFINE_STATIC(route_cb_t, route_cb); 146 #define V_route_cb VNET(route_cb) 147 148 struct mtx rtsock_mtx; 149 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF); 150 151 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx) 152 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx) 153 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED) 154 155 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, ""); 156 157 struct walkarg { 158 int w_tmemsize; 159 int w_op, w_arg; 160 caddr_t w_tmem; 161 struct sysctl_req *w_req; 162 }; 163 164 static void rts_input(struct mbuf *m); 165 static struct mbuf *rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo); 166 static int rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, 167 struct walkarg *w, int *plen); 168 static int rt_xaddrs(caddr_t cp, caddr_t cplim, 169 struct rt_addrinfo *rtinfo); 170 static int sysctl_dumpentry(struct radix_node *rn, void *vw); 171 static int sysctl_iflist(int af, struct walkarg *w); 172 static int sysctl_ifmalist(int af, struct walkarg *w); 173 static int route_output(struct mbuf *m, struct socket *so, ...); 174 static void rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out); 175 static void rt_dispatch(struct mbuf *, sa_family_t); 176 static struct sockaddr *rtsock_fix_netmask(struct sockaddr *dst, 177 struct sockaddr *smask, struct sockaddr_storage *dmask); 178 179 static struct netisr_handler rtsock_nh = { 180 .nh_name = "rtsock", 181 .nh_handler = rts_input, 182 .nh_proto = NETISR_ROUTE, 183 .nh_policy = NETISR_POLICY_SOURCE, 184 }; 185 186 static int 187 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS) 188 { 189 int error, qlimit; 190 191 netisr_getqlimit(&rtsock_nh, &qlimit); 192 error = sysctl_handle_int(oidp, &qlimit, 0, req); 193 if (error || !req->newptr) 194 return (error); 195 if (qlimit < 1) 196 return (EINVAL); 197 return (netisr_setqlimit(&rtsock_nh, qlimit)); 198 } 199 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW, 200 0, 0, sysctl_route_netisr_maxqlen, "I", 201 "maximum routing socket dispatch queue length"); 202 203 static void 204 vnet_rts_init(void) 205 { 206 int tmp; 207 208 if (IS_DEFAULT_VNET(curvnet)) { 209 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp)) 210 rtsock_nh.nh_qlimit = tmp; 211 netisr_register(&rtsock_nh); 212 } 213 #ifdef VIMAGE 214 else 215 netisr_register_vnet(&rtsock_nh); 216 #endif 217 } 218 VNET_SYSINIT(vnet_rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, 219 vnet_rts_init, 0); 220 221 #ifdef VIMAGE 222 static void 223 vnet_rts_uninit(void) 224 { 225 226 netisr_unregister_vnet(&rtsock_nh); 227 } 228 VNET_SYSUNINIT(vnet_rts_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, 229 vnet_rts_uninit, 0); 230 #endif 231 232 static int 233 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src, 234 struct rawcb *rp) 235 { 236 int fibnum; 237 238 KASSERT(m != NULL, ("%s: m is NULL", __func__)); 239 KASSERT(proto != NULL, ("%s: proto is NULL", __func__)); 240 KASSERT(rp != NULL, ("%s: rp is NULL", __func__)); 241 242 /* No filtering requested. */ 243 if ((m->m_flags & RTS_FILTER_FIB) == 0) 244 return (0); 245 246 /* Check if it is a rts and the fib matches the one of the socket. */ 247 fibnum = M_GETFIB(m); 248 if (proto->sp_family != PF_ROUTE || 249 rp->rcb_socket == NULL || 250 rp->rcb_socket->so_fibnum == fibnum) 251 return (0); 252 253 /* Filtering requested and no match, the socket shall be skipped. */ 254 return (1); 255 } 256 257 static void 258 rts_input(struct mbuf *m) 259 { 260 struct sockproto route_proto; 261 unsigned short *family; 262 struct m_tag *tag; 263 264 route_proto.sp_family = PF_ROUTE; 265 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL); 266 if (tag != NULL) { 267 family = (unsigned short *)(tag + 1); 268 route_proto.sp_protocol = *family; 269 m_tag_delete(m, tag); 270 } else 271 route_proto.sp_protocol = 0; 272 273 raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb); 274 } 275 276 /* 277 * It really doesn't make any sense at all for this code to share much 278 * with raw_usrreq.c, since its functionality is so restricted. XXX 279 */ 280 static void 281 rts_abort(struct socket *so) 282 { 283 284 raw_usrreqs.pru_abort(so); 285 } 286 287 static void 288 rts_close(struct socket *so) 289 { 290 291 raw_usrreqs.pru_close(so); 292 } 293 294 /* pru_accept is EOPNOTSUPP */ 295 296 static int 297 rts_attach(struct socket *so, int proto, struct thread *td) 298 { 299 struct rawcb *rp; 300 int error; 301 302 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL")); 303 304 /* XXX */ 305 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 306 307 so->so_pcb = (caddr_t)rp; 308 so->so_fibnum = td->td_proc->p_fibnum; 309 error = raw_attach(so, proto); 310 rp = sotorawcb(so); 311 if (error) { 312 so->so_pcb = NULL; 313 free(rp, M_PCB); 314 return error; 315 } 316 RTSOCK_LOCK(); 317 switch(rp->rcb_proto.sp_protocol) { 318 case AF_INET: 319 V_route_cb.ip_count++; 320 break; 321 case AF_INET6: 322 V_route_cb.ip6_count++; 323 break; 324 } 325 V_route_cb.any_count++; 326 RTSOCK_UNLOCK(); 327 soisconnected(so); 328 so->so_options |= SO_USELOOPBACK; 329 return 0; 330 } 331 332 static int 333 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 334 { 335 336 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */ 337 } 338 339 static int 340 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 341 { 342 343 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */ 344 } 345 346 /* pru_connect2 is EOPNOTSUPP */ 347 /* pru_control is EOPNOTSUPP */ 348 349 static void 350 rts_detach(struct socket *so) 351 { 352 struct rawcb *rp = sotorawcb(so); 353 354 KASSERT(rp != NULL, ("rts_detach: rp == NULL")); 355 356 RTSOCK_LOCK(); 357 switch(rp->rcb_proto.sp_protocol) { 358 case AF_INET: 359 V_route_cb.ip_count--; 360 break; 361 case AF_INET6: 362 V_route_cb.ip6_count--; 363 break; 364 } 365 V_route_cb.any_count--; 366 RTSOCK_UNLOCK(); 367 raw_usrreqs.pru_detach(so); 368 } 369 370 static int 371 rts_disconnect(struct socket *so) 372 { 373 374 return (raw_usrreqs.pru_disconnect(so)); 375 } 376 377 /* pru_listen is EOPNOTSUPP */ 378 379 static int 380 rts_peeraddr(struct socket *so, struct sockaddr **nam) 381 { 382 383 return (raw_usrreqs.pru_peeraddr(so, nam)); 384 } 385 386 /* pru_rcvd is EOPNOTSUPP */ 387 /* pru_rcvoob is EOPNOTSUPP */ 388 389 static int 390 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 391 struct mbuf *control, struct thread *td) 392 { 393 394 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 395 } 396 397 /* pru_sense is null */ 398 399 static int 400 rts_shutdown(struct socket *so) 401 { 402 403 return (raw_usrreqs.pru_shutdown(so)); 404 } 405 406 static int 407 rts_sockaddr(struct socket *so, struct sockaddr **nam) 408 { 409 410 return (raw_usrreqs.pru_sockaddr(so, nam)); 411 } 412 413 static struct pr_usrreqs route_usrreqs = { 414 .pru_abort = rts_abort, 415 .pru_attach = rts_attach, 416 .pru_bind = rts_bind, 417 .pru_connect = rts_connect, 418 .pru_detach = rts_detach, 419 .pru_disconnect = rts_disconnect, 420 .pru_peeraddr = rts_peeraddr, 421 .pru_send = rts_send, 422 .pru_shutdown = rts_shutdown, 423 .pru_sockaddr = rts_sockaddr, 424 .pru_close = rts_close, 425 }; 426 427 #ifndef _SOCKADDR_UNION_DEFINED 428 #define _SOCKADDR_UNION_DEFINED 429 /* 430 * The union of all possible address formats we handle. 431 */ 432 union sockaddr_union { 433 struct sockaddr sa; 434 struct sockaddr_in sin; 435 struct sockaddr_in6 sin6; 436 }; 437 #endif /* _SOCKADDR_UNION_DEFINED */ 438 439 static int 440 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp, 441 struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred) 442 { 443 444 /* First, see if the returned address is part of the jail. */ 445 if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) { 446 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 447 return (0); 448 } 449 450 switch (info->rti_info[RTAX_DST]->sa_family) { 451 #ifdef INET 452 case AF_INET: 453 { 454 struct in_addr ia; 455 struct ifaddr *ifa; 456 int found; 457 458 found = 0; 459 /* 460 * Try to find an address on the given outgoing interface 461 * that belongs to the jail. 462 */ 463 IF_ADDR_RLOCK(ifp); 464 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 465 struct sockaddr *sa; 466 sa = ifa->ifa_addr; 467 if (sa->sa_family != AF_INET) 468 continue; 469 ia = ((struct sockaddr_in *)sa)->sin_addr; 470 if (prison_check_ip4(cred, &ia) == 0) { 471 found = 1; 472 break; 473 } 474 } 475 IF_ADDR_RUNLOCK(ifp); 476 if (!found) { 477 /* 478 * As a last resort return the 'default' jail address. 479 */ 480 ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)-> 481 sin_addr; 482 if (prison_get_ip4(cred, &ia) != 0) 483 return (ESRCH); 484 } 485 bzero(&saun->sin, sizeof(struct sockaddr_in)); 486 saun->sin.sin_len = sizeof(struct sockaddr_in); 487 saun->sin.sin_family = AF_INET; 488 saun->sin.sin_addr.s_addr = ia.s_addr; 489 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin; 490 break; 491 } 492 #endif 493 #ifdef INET6 494 case AF_INET6: 495 { 496 struct in6_addr ia6; 497 struct ifaddr *ifa; 498 int found; 499 500 found = 0; 501 /* 502 * Try to find an address on the given outgoing interface 503 * that belongs to the jail. 504 */ 505 IF_ADDR_RLOCK(ifp); 506 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 507 struct sockaddr *sa; 508 sa = ifa->ifa_addr; 509 if (sa->sa_family != AF_INET6) 510 continue; 511 bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr, 512 &ia6, sizeof(struct in6_addr)); 513 if (prison_check_ip6(cred, &ia6) == 0) { 514 found = 1; 515 break; 516 } 517 } 518 IF_ADDR_RUNLOCK(ifp); 519 if (!found) { 520 /* 521 * As a last resort return the 'default' jail address. 522 */ 523 ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)-> 524 sin6_addr; 525 if (prison_get_ip6(cred, &ia6) != 0) 526 return (ESRCH); 527 } 528 bzero(&saun->sin6, sizeof(struct sockaddr_in6)); 529 saun->sin6.sin6_len = sizeof(struct sockaddr_in6); 530 saun->sin6.sin6_family = AF_INET6; 531 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr)); 532 if (sa6_recoverscope(&saun->sin6) != 0) 533 return (ESRCH); 534 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6; 535 break; 536 } 537 #endif 538 default: 539 return (ESRCH); 540 } 541 return (0); 542 } 543 544 /*ARGSUSED*/ 545 static int 546 route_output(struct mbuf *m, struct socket *so, ...) 547 { 548 RIB_RLOCK_TRACKER; 549 struct rt_msghdr *rtm = NULL; 550 struct rtentry *rt = NULL; 551 struct rib_head *rnh; 552 struct rt_addrinfo info; 553 struct sockaddr_storage ss; 554 #ifdef INET6 555 struct sockaddr_in6 *sin6; 556 int i, rti_need_deembed = 0; 557 #endif 558 int alloc_len = 0, len, error = 0, fibnum; 559 struct ifnet *ifp = NULL; 560 union sockaddr_union saun; 561 sa_family_t saf = AF_UNSPEC; 562 struct rawcb *rp = NULL; 563 struct walkarg w; 564 565 fibnum = so->so_fibnum; 566 567 #define senderr(e) { error = e; goto flush;} 568 if (m == NULL || ((m->m_len < sizeof(long)) && 569 (m = m_pullup(m, sizeof(long))) == NULL)) 570 return (ENOBUFS); 571 if ((m->m_flags & M_PKTHDR) == 0) 572 panic("route_output"); 573 len = m->m_pkthdr.len; 574 if (len < sizeof(*rtm) || 575 len != mtod(m, struct rt_msghdr *)->rtm_msglen) 576 senderr(EINVAL); 577 578 /* 579 * Most of current messages are in range 200-240 bytes, 580 * minimize possible re-allocation on reply using larger size 581 * buffer aligned on 1k boundaty. 582 */ 583 alloc_len = roundup2(len, 1024); 584 if ((rtm = malloc(alloc_len, M_TEMP, M_NOWAIT)) == NULL) 585 senderr(ENOBUFS); 586 587 m_copydata(m, 0, len, (caddr_t)rtm); 588 bzero(&info, sizeof(info)); 589 bzero(&w, sizeof(w)); 590 591 if (rtm->rtm_version != RTM_VERSION) { 592 /* Do not touch message since format is unknown */ 593 free(rtm, M_TEMP); 594 rtm = NULL; 595 senderr(EPROTONOSUPPORT); 596 } 597 598 /* 599 * Starting from here, it is possible 600 * to alter original message and insert 601 * caller PID and error value. 602 */ 603 604 rtm->rtm_pid = curproc->p_pid; 605 info.rti_addrs = rtm->rtm_addrs; 606 607 info.rti_mflags = rtm->rtm_inits; 608 info.rti_rmx = &rtm->rtm_rmx; 609 610 /* 611 * rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6 612 * link-local address because rtrequest requires addresses with 613 * embedded scope id. 614 */ 615 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) 616 senderr(EINVAL); 617 618 if (rtm->rtm_flags & RTF_RNH_LOCKED) 619 senderr(EINVAL); 620 info.rti_flags = rtm->rtm_flags; 621 if (info.rti_info[RTAX_DST] == NULL || 622 info.rti_info[RTAX_DST]->sa_family >= AF_MAX || 623 (info.rti_info[RTAX_GATEWAY] != NULL && 624 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) 625 senderr(EINVAL); 626 saf = info.rti_info[RTAX_DST]->sa_family; 627 /* 628 * Verify that the caller has the appropriate privilege; RTM_GET 629 * is the only operation the non-superuser is allowed. 630 */ 631 if (rtm->rtm_type != RTM_GET) { 632 error = priv_check(curthread, PRIV_NET_ROUTE); 633 if (error) 634 senderr(error); 635 } 636 637 /* 638 * The given gateway address may be an interface address. 639 * For example, issuing a "route change" command on a route 640 * entry that was created from a tunnel, and the gateway 641 * address given is the local end point. In this case the 642 * RTF_GATEWAY flag must be cleared or the destination will 643 * not be reachable even though there is no error message. 644 */ 645 if (info.rti_info[RTAX_GATEWAY] != NULL && 646 info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) { 647 struct rt_addrinfo ginfo; 648 struct sockaddr *gdst; 649 650 bzero(&ginfo, sizeof(ginfo)); 651 bzero(&ss, sizeof(ss)); 652 ss.ss_len = sizeof(ss); 653 654 ginfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ss; 655 gdst = info.rti_info[RTAX_GATEWAY]; 656 657 /* 658 * A host route through the loopback interface is 659 * installed for each interface adddress. In pre 8.0 660 * releases the interface address of a PPP link type 661 * is not reachable locally. This behavior is fixed as 662 * part of the new L2/L3 redesign and rewrite work. The 663 * signature of this interface address route is the 664 * AF_LINK sa_family type of the rt_gateway, and the 665 * rt_ifp has the IFF_LOOPBACK flag set. 666 */ 667 if (rib_lookup_info(fibnum, gdst, NHR_REF, 0, &ginfo) == 0) { 668 if (ss.ss_family == AF_LINK && 669 ginfo.rti_ifp->if_flags & IFF_LOOPBACK) { 670 info.rti_flags &= ~RTF_GATEWAY; 671 info.rti_flags |= RTF_GWFLAG_COMPAT; 672 } 673 rib_free_info(&ginfo); 674 } 675 } 676 677 switch (rtm->rtm_type) { 678 struct rtentry *saved_nrt; 679 680 case RTM_ADD: 681 case RTM_CHANGE: 682 if (rtm->rtm_type == RTM_ADD) { 683 if (info.rti_info[RTAX_GATEWAY] == NULL) 684 senderr(EINVAL); 685 } 686 saved_nrt = NULL; 687 688 /* support for new ARP code */ 689 if (info.rti_info[RTAX_GATEWAY] != NULL && 690 info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK && 691 (rtm->rtm_flags & RTF_LLDATA) != 0) { 692 error = lla_rt_output(rtm, &info); 693 #ifdef INET6 694 if (error == 0) 695 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 696 #endif 697 break; 698 } 699 error = rtrequest1_fib(rtm->rtm_type, &info, &saved_nrt, 700 fibnum); 701 if (error == 0 && saved_nrt != NULL) { 702 #ifdef INET6 703 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 704 #endif 705 RT_LOCK(saved_nrt); 706 rtm->rtm_index = saved_nrt->rt_ifp->if_index; 707 RT_REMREF(saved_nrt); 708 RT_UNLOCK(saved_nrt); 709 } 710 break; 711 712 case RTM_DELETE: 713 saved_nrt = NULL; 714 /* support for new ARP code */ 715 if (info.rti_info[RTAX_GATEWAY] && 716 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 717 (rtm->rtm_flags & RTF_LLDATA) != 0) { 718 error = lla_rt_output(rtm, &info); 719 #ifdef INET6 720 if (error == 0) 721 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 722 #endif 723 break; 724 } 725 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, fibnum); 726 if (error == 0) { 727 RT_LOCK(saved_nrt); 728 rt = saved_nrt; 729 goto report; 730 } 731 #ifdef INET6 732 /* rt_msg2() will not be used when RTM_DELETE fails. */ 733 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 734 #endif 735 break; 736 737 case RTM_GET: 738 rnh = rt_tables_get_rnh(fibnum, saf); 739 if (rnh == NULL) 740 senderr(EAFNOSUPPORT); 741 742 RIB_RLOCK(rnh); 743 744 if (info.rti_info[RTAX_NETMASK] == NULL && 745 rtm->rtm_type == RTM_GET) { 746 /* 747 * Provide longest prefix match for 748 * address lookup (no mask). 749 * 'route -n get addr' 750 */ 751 rt = (struct rtentry *) rnh->rnh_matchaddr( 752 info.rti_info[RTAX_DST], &rnh->head); 753 } else 754 rt = (struct rtentry *) rnh->rnh_lookup( 755 info.rti_info[RTAX_DST], 756 info.rti_info[RTAX_NETMASK], &rnh->head); 757 758 if (rt == NULL) { 759 RIB_RUNLOCK(rnh); 760 senderr(ESRCH); 761 } 762 #ifdef RADIX_MPATH 763 /* 764 * for RTM_CHANGE/LOCK, if we got multipath routes, 765 * we require users to specify a matching RTAX_GATEWAY. 766 * 767 * for RTM_GET, gate is optional even with multipath. 768 * if gate == NULL the first match is returned. 769 * (no need to call rt_mpath_matchgate if gate == NULL) 770 */ 771 if (rt_mpath_capable(rnh) && 772 (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) { 773 rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]); 774 if (!rt) { 775 RIB_RUNLOCK(rnh); 776 senderr(ESRCH); 777 } 778 } 779 #endif 780 /* 781 * If performing proxied L2 entry insertion, and 782 * the actual PPP host entry is found, perform 783 * another search to retrieve the prefix route of 784 * the local end point of the PPP link. 785 */ 786 if (rtm->rtm_flags & RTF_ANNOUNCE) { 787 struct sockaddr laddr; 788 789 if (rt->rt_ifp != NULL && 790 rt->rt_ifp->if_type == IFT_PROPVIRTUAL) { 791 struct ifaddr *ifa; 792 793 NET_EPOCH_ENTER(); 794 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1, 795 RT_ALL_FIBS); 796 if (ifa != NULL) 797 rt_maskedcopy(ifa->ifa_addr, 798 &laddr, 799 ifa->ifa_netmask); 800 NET_EPOCH_EXIT(); 801 } else 802 rt_maskedcopy(rt->rt_ifa->ifa_addr, 803 &laddr, 804 rt->rt_ifa->ifa_netmask); 805 /* 806 * refactor rt and no lock operation necessary 807 */ 808 rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, 809 &rnh->head); 810 if (rt == NULL) { 811 RIB_RUNLOCK(rnh); 812 senderr(ESRCH); 813 } 814 } 815 RT_LOCK(rt); 816 RT_ADDREF(rt); 817 RIB_RUNLOCK(rnh); 818 819 report: 820 RT_LOCK_ASSERT(rt); 821 if ((rt->rt_flags & RTF_HOST) == 0 822 ? jailed_without_vnet(curthread->td_ucred) 823 : prison_if(curthread->td_ucred, 824 rt_key(rt)) != 0) { 825 RT_UNLOCK(rt); 826 senderr(ESRCH); 827 } 828 info.rti_info[RTAX_DST] = rt_key(rt); 829 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 830 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt), 831 rt_mask(rt), &ss); 832 info.rti_info[RTAX_GENMASK] = 0; 833 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 834 ifp = rt->rt_ifp; 835 if (ifp) { 836 info.rti_info[RTAX_IFP] = 837 ifp->if_addr->ifa_addr; 838 error = rtm_get_jailed(&info, ifp, rt, 839 &saun, curthread->td_ucred); 840 if (error != 0) { 841 RT_UNLOCK(rt); 842 senderr(error); 843 } 844 if (ifp->if_flags & IFF_POINTOPOINT) 845 info.rti_info[RTAX_BRD] = 846 rt->rt_ifa->ifa_dstaddr; 847 rtm->rtm_index = ifp->if_index; 848 } else { 849 info.rti_info[RTAX_IFP] = NULL; 850 info.rti_info[RTAX_IFA] = NULL; 851 } 852 } else if ((ifp = rt->rt_ifp) != NULL) { 853 rtm->rtm_index = ifp->if_index; 854 } 855 856 /* Check if we need to realloc storage */ 857 rtsock_msg_buffer(rtm->rtm_type, &info, NULL, &len); 858 if (len > alloc_len) { 859 struct rt_msghdr *new_rtm; 860 new_rtm = malloc(len, M_TEMP, M_NOWAIT); 861 if (new_rtm == NULL) { 862 RT_UNLOCK(rt); 863 senderr(ENOBUFS); 864 } 865 bcopy(rtm, new_rtm, rtm->rtm_msglen); 866 free(rtm, M_TEMP); 867 rtm = new_rtm; 868 alloc_len = len; 869 } 870 871 w.w_tmem = (caddr_t)rtm; 872 w.w_tmemsize = alloc_len; 873 rtsock_msg_buffer(rtm->rtm_type, &info, &w, &len); 874 875 if (rt->rt_flags & RTF_GWFLAG_COMPAT) 876 rtm->rtm_flags = RTF_GATEWAY | 877 (rt->rt_flags & ~RTF_GWFLAG_COMPAT); 878 else 879 rtm->rtm_flags = rt->rt_flags; 880 rt_getmetrics(rt, &rtm->rtm_rmx); 881 rtm->rtm_addrs = info.rti_addrs; 882 883 RT_UNLOCK(rt); 884 break; 885 886 default: 887 senderr(EOPNOTSUPP); 888 } 889 890 flush: 891 if (rt != NULL) 892 RTFREE(rt); 893 /* 894 * Check to see if we don't want our own messages. 895 */ 896 if ((so->so_options & SO_USELOOPBACK) == 0) { 897 if (V_route_cb.any_count <= 1) { 898 if (rtm != NULL) 899 free(rtm, M_TEMP); 900 m_freem(m); 901 return (error); 902 } 903 /* There is another listener, so construct message */ 904 rp = sotorawcb(so); 905 } 906 907 if (rtm != NULL) { 908 #ifdef INET6 909 if (rti_need_deembed) { 910 /* sin6_scope_id is recovered before sending rtm. */ 911 sin6 = (struct sockaddr_in6 *)&ss; 912 for (i = 0; i < RTAX_MAX; i++) { 913 if (info.rti_info[i] == NULL) 914 continue; 915 if (info.rti_info[i]->sa_family != AF_INET6) 916 continue; 917 bcopy(info.rti_info[i], sin6, sizeof(*sin6)); 918 if (sa6_recoverscope(sin6) == 0) 919 bcopy(sin6, info.rti_info[i], 920 sizeof(*sin6)); 921 } 922 } 923 #endif 924 if (error != 0) 925 rtm->rtm_errno = error; 926 else 927 rtm->rtm_flags |= RTF_DONE; 928 929 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 930 if (m->m_pkthdr.len < rtm->rtm_msglen) { 931 m_freem(m); 932 m = NULL; 933 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 934 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 935 936 free(rtm, M_TEMP); 937 } 938 if (m != NULL) { 939 M_SETFIB(m, fibnum); 940 m->m_flags |= RTS_FILTER_FIB; 941 if (rp) { 942 /* 943 * XXX insure we don't get a copy by 944 * invalidating our protocol 945 */ 946 unsigned short family = rp->rcb_proto.sp_family; 947 rp->rcb_proto.sp_family = 0; 948 rt_dispatch(m, saf); 949 rp->rcb_proto.sp_family = family; 950 } else 951 rt_dispatch(m, saf); 952 } 953 954 return (error); 955 } 956 957 static void 958 rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out) 959 { 960 961 bzero(out, sizeof(*out)); 962 out->rmx_mtu = rt->rt_mtu; 963 out->rmx_weight = rt->rt_weight; 964 out->rmx_pksent = counter_u64_fetch(rt->rt_pksent); 965 /* Kernel -> userland timebase conversion. */ 966 out->rmx_expire = rt->rt_expire ? 967 rt->rt_expire - time_uptime + time_second : 0; 968 } 969 970 /* 971 * Extract the addresses of the passed sockaddrs. 972 * Do a little sanity checking so as to avoid bad memory references. 973 * This data is derived straight from userland. 974 */ 975 static int 976 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 977 { 978 struct sockaddr *sa; 979 int i; 980 981 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 982 if ((rtinfo->rti_addrs & (1 << i)) == 0) 983 continue; 984 sa = (struct sockaddr *)cp; 985 /* 986 * It won't fit. 987 */ 988 if (cp + sa->sa_len > cplim) 989 return (EINVAL); 990 /* 991 * there are no more.. quit now 992 * If there are more bits, they are in error. 993 * I've seen this. route(1) can evidently generate these. 994 * This causes kernel to core dump. 995 * for compatibility, If we see this, point to a safe address. 996 */ 997 if (sa->sa_len == 0) { 998 rtinfo->rti_info[i] = &sa_zero; 999 return (0); /* should be EINVAL but for compat */ 1000 } 1001 /* accept it */ 1002 #ifdef INET6 1003 if (sa->sa_family == AF_INET6) 1004 sa6_embedscope((struct sockaddr_in6 *)sa, 1005 V_ip6_use_defzone); 1006 #endif 1007 rtinfo->rti_info[i] = sa; 1008 cp += SA_SIZE(sa); 1009 } 1010 return (0); 1011 } 1012 1013 /* 1014 * Fill in @dmask with valid netmask leaving original @smask 1015 * intact. Mostly used with radix netmasks. 1016 */ 1017 static struct sockaddr * 1018 rtsock_fix_netmask(struct sockaddr *dst, struct sockaddr *smask, 1019 struct sockaddr_storage *dmask) 1020 { 1021 if (dst == NULL || smask == NULL) 1022 return (NULL); 1023 1024 memset(dmask, 0, dst->sa_len); 1025 memcpy(dmask, smask, smask->sa_len); 1026 dmask->ss_len = dst->sa_len; 1027 dmask->ss_family = dst->sa_family; 1028 1029 return ((struct sockaddr *)dmask); 1030 } 1031 1032 /* 1033 * Writes information related to @rtinfo object to newly-allocated mbuf. 1034 * Assumes MCLBYTES is enough to construct any message. 1035 * Used for OS notifications of vaious events (if/ifa announces,etc) 1036 * 1037 * Returns allocated mbuf or NULL on failure. 1038 */ 1039 static struct mbuf * 1040 rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 1041 { 1042 struct rt_msghdr *rtm; 1043 struct mbuf *m; 1044 int i; 1045 struct sockaddr *sa; 1046 #ifdef INET6 1047 struct sockaddr_storage ss; 1048 struct sockaddr_in6 *sin6; 1049 #endif 1050 int len, dlen; 1051 1052 switch (type) { 1053 1054 case RTM_DELADDR: 1055 case RTM_NEWADDR: 1056 len = sizeof(struct ifa_msghdr); 1057 break; 1058 1059 case RTM_DELMADDR: 1060 case RTM_NEWMADDR: 1061 len = sizeof(struct ifma_msghdr); 1062 break; 1063 1064 case RTM_IFINFO: 1065 len = sizeof(struct if_msghdr); 1066 break; 1067 1068 case RTM_IFANNOUNCE: 1069 case RTM_IEEE80211: 1070 len = sizeof(struct if_announcemsghdr); 1071 break; 1072 1073 default: 1074 len = sizeof(struct rt_msghdr); 1075 } 1076 1077 /* XXXGL: can we use MJUMPAGESIZE cluster here? */ 1078 KASSERT(len <= MCLBYTES, ("%s: message too big", __func__)); 1079 if (len > MHLEN) 1080 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1081 else 1082 m = m_gethdr(M_NOWAIT, MT_DATA); 1083 if (m == NULL) 1084 return (m); 1085 1086 m->m_pkthdr.len = m->m_len = len; 1087 rtm = mtod(m, struct rt_msghdr *); 1088 bzero((caddr_t)rtm, len); 1089 for (i = 0; i < RTAX_MAX; i++) { 1090 if ((sa = rtinfo->rti_info[i]) == NULL) 1091 continue; 1092 rtinfo->rti_addrs |= (1 << i); 1093 dlen = SA_SIZE(sa); 1094 #ifdef INET6 1095 if (V_deembed_scopeid && sa->sa_family == AF_INET6) { 1096 sin6 = (struct sockaddr_in6 *)&ss; 1097 bcopy(sa, sin6, sizeof(*sin6)); 1098 if (sa6_recoverscope(sin6) == 0) 1099 sa = (struct sockaddr *)sin6; 1100 } 1101 #endif 1102 m_copyback(m, len, dlen, (caddr_t)sa); 1103 len += dlen; 1104 } 1105 if (m->m_pkthdr.len != len) { 1106 m_freem(m); 1107 return (NULL); 1108 } 1109 rtm->rtm_msglen = len; 1110 rtm->rtm_version = RTM_VERSION; 1111 rtm->rtm_type = type; 1112 return (m); 1113 } 1114 1115 /* 1116 * Writes information related to @rtinfo object to preallocated buffer. 1117 * Stores needed size in @plen. If @w is NULL, calculates size without 1118 * writing. 1119 * Used for sysctl dumps and rtsock answers (RTM_DEL/RTM_GET) generation. 1120 * 1121 * Returns 0 on success. 1122 * 1123 */ 1124 static int 1125 rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, struct walkarg *w, int *plen) 1126 { 1127 int i; 1128 int len, buflen = 0, dlen; 1129 caddr_t cp = NULL; 1130 struct rt_msghdr *rtm = NULL; 1131 #ifdef INET6 1132 struct sockaddr_storage ss; 1133 struct sockaddr_in6 *sin6; 1134 #endif 1135 #ifdef COMPAT_FREEBSD32 1136 bool compat32 = false; 1137 #endif 1138 1139 switch (type) { 1140 1141 case RTM_DELADDR: 1142 case RTM_NEWADDR: 1143 if (w != NULL && w->w_op == NET_RT_IFLISTL) { 1144 #ifdef COMPAT_FREEBSD32 1145 if (w->w_req->flags & SCTL_MASK32) { 1146 len = sizeof(struct ifa_msghdrl32); 1147 compat32 = true; 1148 } else 1149 #endif 1150 len = sizeof(struct ifa_msghdrl); 1151 } else 1152 len = sizeof(struct ifa_msghdr); 1153 break; 1154 1155 case RTM_IFINFO: 1156 #ifdef COMPAT_FREEBSD32 1157 if (w != NULL && w->w_req->flags & SCTL_MASK32) { 1158 if (w->w_op == NET_RT_IFLISTL) 1159 len = sizeof(struct if_msghdrl32); 1160 else 1161 len = sizeof(struct if_msghdr32); 1162 compat32 = true; 1163 break; 1164 } 1165 #endif 1166 if (w != NULL && w->w_op == NET_RT_IFLISTL) 1167 len = sizeof(struct if_msghdrl); 1168 else 1169 len = sizeof(struct if_msghdr); 1170 break; 1171 1172 case RTM_NEWMADDR: 1173 len = sizeof(struct ifma_msghdr); 1174 break; 1175 1176 default: 1177 len = sizeof(struct rt_msghdr); 1178 } 1179 1180 if (w != NULL) { 1181 rtm = (struct rt_msghdr *)w->w_tmem; 1182 buflen = w->w_tmemsize - len; 1183 cp = (caddr_t)w->w_tmem + len; 1184 } 1185 1186 rtinfo->rti_addrs = 0; 1187 for (i = 0; i < RTAX_MAX; i++) { 1188 struct sockaddr *sa; 1189 1190 if ((sa = rtinfo->rti_info[i]) == NULL) 1191 continue; 1192 rtinfo->rti_addrs |= (1 << i); 1193 #ifdef COMPAT_FREEBSD32 1194 if (compat32) 1195 dlen = SA_SIZE32(sa); 1196 else 1197 #endif 1198 dlen = SA_SIZE(sa); 1199 if (cp != NULL && buflen >= dlen) { 1200 #ifdef INET6 1201 if (V_deembed_scopeid && sa->sa_family == AF_INET6) { 1202 sin6 = (struct sockaddr_in6 *)&ss; 1203 bcopy(sa, sin6, sizeof(*sin6)); 1204 if (sa6_recoverscope(sin6) == 0) 1205 sa = (struct sockaddr *)sin6; 1206 } 1207 #endif 1208 bcopy((caddr_t)sa, cp, (unsigned)dlen); 1209 cp += dlen; 1210 buflen -= dlen; 1211 } else if (cp != NULL) { 1212 /* 1213 * Buffer too small. Count needed size 1214 * and return with error. 1215 */ 1216 cp = NULL; 1217 } 1218 1219 len += dlen; 1220 } 1221 1222 if (cp != NULL) { 1223 dlen = ALIGN(len) - len; 1224 if (buflen < dlen) 1225 cp = NULL; 1226 else { 1227 bzero(cp, dlen); 1228 cp += dlen; 1229 buflen -= dlen; 1230 } 1231 } 1232 len = ALIGN(len); 1233 1234 if (cp != NULL) { 1235 /* fill header iff buffer is large enough */ 1236 rtm->rtm_version = RTM_VERSION; 1237 rtm->rtm_type = type; 1238 rtm->rtm_msglen = len; 1239 } 1240 1241 *plen = len; 1242 1243 if (w != NULL && cp == NULL) 1244 return (ENOBUFS); 1245 1246 return (0); 1247 } 1248 1249 /* 1250 * This routine is called to generate a message from the routing 1251 * socket indicating that a redirect has occurred, a routing lookup 1252 * has failed, or that a protocol has detected timeouts to a particular 1253 * destination. 1254 */ 1255 void 1256 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error, 1257 int fibnum) 1258 { 1259 struct rt_msghdr *rtm; 1260 struct mbuf *m; 1261 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1262 1263 if (V_route_cb.any_count == 0) 1264 return; 1265 m = rtsock_msg_mbuf(type, rtinfo); 1266 if (m == NULL) 1267 return; 1268 1269 if (fibnum != RT_ALL_FIBS) { 1270 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out " 1271 "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs)); 1272 M_SETFIB(m, fibnum); 1273 m->m_flags |= RTS_FILTER_FIB; 1274 } 1275 1276 rtm = mtod(m, struct rt_msghdr *); 1277 rtm->rtm_flags = RTF_DONE | flags; 1278 rtm->rtm_errno = error; 1279 rtm->rtm_addrs = rtinfo->rti_addrs; 1280 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1281 } 1282 1283 void 1284 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 1285 { 1286 1287 rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS); 1288 } 1289 1290 /* 1291 * This routine is called to generate a message from the routing 1292 * socket indicating that the status of a network interface has changed. 1293 */ 1294 void 1295 rt_ifmsg(struct ifnet *ifp) 1296 { 1297 struct if_msghdr *ifm; 1298 struct mbuf *m; 1299 struct rt_addrinfo info; 1300 1301 if (V_route_cb.any_count == 0) 1302 return; 1303 bzero((caddr_t)&info, sizeof(info)); 1304 m = rtsock_msg_mbuf(RTM_IFINFO, &info); 1305 if (m == NULL) 1306 return; 1307 ifm = mtod(m, struct if_msghdr *); 1308 ifm->ifm_index = ifp->if_index; 1309 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1310 if_data_copy(ifp, &ifm->ifm_data); 1311 ifm->ifm_addrs = 0; 1312 rt_dispatch(m, AF_UNSPEC); 1313 } 1314 1315 /* 1316 * Announce interface address arrival/withdraw. 1317 * Please do not call directly, use rt_addrmsg(). 1318 * Assume input data to be valid. 1319 * Returns 0 on success. 1320 */ 1321 int 1322 rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum) 1323 { 1324 struct rt_addrinfo info; 1325 struct sockaddr *sa; 1326 int ncmd; 1327 struct mbuf *m; 1328 struct ifa_msghdr *ifam; 1329 struct ifnet *ifp = ifa->ifa_ifp; 1330 struct sockaddr_storage ss; 1331 1332 if (V_route_cb.any_count == 0) 1333 return (0); 1334 1335 ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 1336 1337 bzero((caddr_t)&info, sizeof(info)); 1338 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1339 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 1340 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask( 1341 info.rti_info[RTAX_IFP], ifa->ifa_netmask, &ss); 1342 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1343 if ((m = rtsock_msg_mbuf(ncmd, &info)) == NULL) 1344 return (ENOBUFS); 1345 ifam = mtod(m, struct ifa_msghdr *); 1346 ifam->ifam_index = ifp->if_index; 1347 ifam->ifam_metric = ifa->ifa_ifp->if_metric; 1348 ifam->ifam_flags = ifa->ifa_flags; 1349 ifam->ifam_addrs = info.rti_addrs; 1350 1351 if (fibnum != RT_ALL_FIBS) { 1352 M_SETFIB(m, fibnum); 1353 m->m_flags |= RTS_FILTER_FIB; 1354 } 1355 1356 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1357 1358 return (0); 1359 } 1360 1361 /* 1362 * Announce route addition/removal. 1363 * Please do not call directly, use rt_routemsg(). 1364 * Note that @rt data MAY be inconsistent/invalid: 1365 * if some userland app sends us "invalid" route message (invalid mask, 1366 * no dst, wrong address families, etc...) we need to pass it back 1367 * to app (and any other rtsock consumers) with rtm_errno field set to 1368 * non-zero value. 1369 * 1370 * Returns 0 on success. 1371 */ 1372 int 1373 rtsock_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt, 1374 int fibnum) 1375 { 1376 struct rt_addrinfo info; 1377 struct sockaddr *sa; 1378 struct mbuf *m; 1379 struct rt_msghdr *rtm; 1380 struct sockaddr_storage ss; 1381 1382 if (V_route_cb.any_count == 0) 1383 return (0); 1384 1385 bzero((caddr_t)&info, sizeof(info)); 1386 info.rti_info[RTAX_DST] = sa = rt_key(rt); 1387 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(sa, rt_mask(rt), &ss); 1388 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1389 if ((m = rtsock_msg_mbuf(cmd, &info)) == NULL) 1390 return (ENOBUFS); 1391 rtm = mtod(m, struct rt_msghdr *); 1392 rtm->rtm_index = ifp->if_index; 1393 rtm->rtm_flags |= rt->rt_flags; 1394 rtm->rtm_errno = error; 1395 rtm->rtm_addrs = info.rti_addrs; 1396 1397 if (fibnum != RT_ALL_FIBS) { 1398 M_SETFIB(m, fibnum); 1399 m->m_flags |= RTS_FILTER_FIB; 1400 } 1401 1402 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1403 1404 return (0); 1405 } 1406 1407 /* 1408 * This is the analogue to the rt_newaddrmsg which performs the same 1409 * function but for multicast group memberhips. This is easier since 1410 * there is no route state to worry about. 1411 */ 1412 void 1413 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1414 { 1415 struct rt_addrinfo info; 1416 struct mbuf *m = NULL; 1417 struct ifnet *ifp = ifma->ifma_ifp; 1418 struct ifma_msghdr *ifmam; 1419 1420 if (V_route_cb.any_count == 0) 1421 return; 1422 1423 bzero((caddr_t)&info, sizeof(info)); 1424 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1425 if (ifp && ifp->if_addr) 1426 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 1427 else 1428 info.rti_info[RTAX_IFP] = NULL; 1429 /* 1430 * If a link-layer address is present, present it as a ``gateway'' 1431 * (similarly to how ARP entries, e.g., are presented). 1432 */ 1433 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr; 1434 m = rtsock_msg_mbuf(cmd, &info); 1435 if (m == NULL) 1436 return; 1437 ifmam = mtod(m, struct ifma_msghdr *); 1438 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n", 1439 __func__)); 1440 ifmam->ifmam_index = ifp->if_index; 1441 ifmam->ifmam_addrs = info.rti_addrs; 1442 rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC); 1443 } 1444 1445 static struct mbuf * 1446 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1447 struct rt_addrinfo *info) 1448 { 1449 struct if_announcemsghdr *ifan; 1450 struct mbuf *m; 1451 1452 if (V_route_cb.any_count == 0) 1453 return NULL; 1454 bzero((caddr_t)info, sizeof(*info)); 1455 m = rtsock_msg_mbuf(type, info); 1456 if (m != NULL) { 1457 ifan = mtod(m, struct if_announcemsghdr *); 1458 ifan->ifan_index = ifp->if_index; 1459 strlcpy(ifan->ifan_name, ifp->if_xname, 1460 sizeof(ifan->ifan_name)); 1461 ifan->ifan_what = what; 1462 } 1463 return m; 1464 } 1465 1466 /* 1467 * This is called to generate routing socket messages indicating 1468 * IEEE80211 wireless events. 1469 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1470 */ 1471 void 1472 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1473 { 1474 struct mbuf *m; 1475 struct rt_addrinfo info; 1476 1477 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1478 if (m != NULL) { 1479 /* 1480 * Append the ieee80211 data. Try to stick it in the 1481 * mbuf containing the ifannounce msg; otherwise allocate 1482 * a new mbuf and append. 1483 * 1484 * NB: we assume m is a single mbuf. 1485 */ 1486 if (data_len > M_TRAILINGSPACE(m)) { 1487 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1488 if (n == NULL) { 1489 m_freem(m); 1490 return; 1491 } 1492 bcopy(data, mtod(n, void *), data_len); 1493 n->m_len = data_len; 1494 m->m_next = n; 1495 } else if (data_len > 0) { 1496 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1497 m->m_len += data_len; 1498 } 1499 if (m->m_flags & M_PKTHDR) 1500 m->m_pkthdr.len += data_len; 1501 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1502 rt_dispatch(m, AF_UNSPEC); 1503 } 1504 } 1505 1506 /* 1507 * This is called to generate routing socket messages indicating 1508 * network interface arrival and departure. 1509 */ 1510 void 1511 rt_ifannouncemsg(struct ifnet *ifp, int what) 1512 { 1513 struct mbuf *m; 1514 struct rt_addrinfo info; 1515 1516 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1517 if (m != NULL) 1518 rt_dispatch(m, AF_UNSPEC); 1519 } 1520 1521 static void 1522 rt_dispatch(struct mbuf *m, sa_family_t saf) 1523 { 1524 struct m_tag *tag; 1525 1526 /* 1527 * Preserve the family from the sockaddr, if any, in an m_tag for 1528 * use when injecting the mbuf into the routing socket buffer from 1529 * the netisr. 1530 */ 1531 if (saf != AF_UNSPEC) { 1532 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short), 1533 M_NOWAIT); 1534 if (tag == NULL) { 1535 m_freem(m); 1536 return; 1537 } 1538 *(unsigned short *)(tag + 1) = saf; 1539 m_tag_prepend(m, tag); 1540 } 1541 #ifdef VIMAGE 1542 if (V_loif) 1543 m->m_pkthdr.rcvif = V_loif; 1544 else { 1545 m_freem(m); 1546 return; 1547 } 1548 #endif 1549 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */ 1550 } 1551 1552 /* 1553 * This is used in dumping the kernel table via sysctl(). 1554 */ 1555 static int 1556 sysctl_dumpentry(struct radix_node *rn, void *vw) 1557 { 1558 struct walkarg *w = vw; 1559 struct rtentry *rt = (struct rtentry *)rn; 1560 int error = 0, size; 1561 struct rt_addrinfo info; 1562 struct sockaddr_storage ss; 1563 1564 IFNET_RLOCK_NOSLEEP_ASSERT(); 1565 1566 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1567 return 0; 1568 if ((rt->rt_flags & RTF_HOST) == 0 1569 ? jailed_without_vnet(w->w_req->td->td_ucred) 1570 : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0) 1571 return (0); 1572 bzero((caddr_t)&info, sizeof(info)); 1573 info.rti_info[RTAX_DST] = rt_key(rt); 1574 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1575 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt), 1576 rt_mask(rt), &ss); 1577 info.rti_info[RTAX_GENMASK] = 0; 1578 if (rt->rt_ifp && !(rt->rt_ifp->if_flags & IFF_DYING)) { 1579 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr; 1580 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1581 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1582 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr; 1583 } 1584 if ((error = rtsock_msg_buffer(RTM_GET, &info, w, &size)) != 0) 1585 return (error); 1586 if (w->w_req && w->w_tmem) { 1587 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 1588 1589 bzero(&rtm->rtm_index, 1590 sizeof(*rtm) - offsetof(struct rt_msghdr, rtm_index)); 1591 if (rt->rt_flags & RTF_GWFLAG_COMPAT) 1592 rtm->rtm_flags = RTF_GATEWAY | 1593 (rt->rt_flags & ~RTF_GWFLAG_COMPAT); 1594 else 1595 rtm->rtm_flags = rt->rt_flags; 1596 rt_getmetrics(rt, &rtm->rtm_rmx); 1597 rtm->rtm_index = rt->rt_ifp->if_index; 1598 rtm->rtm_addrs = info.rti_addrs; 1599 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 1600 return (error); 1601 } 1602 return (error); 1603 } 1604 1605 static int 1606 sysctl_iflist_ifml(struct ifnet *ifp, const struct if_data *src_ifd, 1607 struct rt_addrinfo *info, struct walkarg *w, int len) 1608 { 1609 struct if_msghdrl *ifm; 1610 struct if_data *ifd; 1611 1612 ifm = (struct if_msghdrl *)w->w_tmem; 1613 1614 #ifdef COMPAT_FREEBSD32 1615 if (w->w_req->flags & SCTL_MASK32) { 1616 struct if_msghdrl32 *ifm32; 1617 1618 ifm32 = (struct if_msghdrl32 *)ifm; 1619 ifm32->ifm_addrs = info->rti_addrs; 1620 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1621 ifm32->ifm_index = ifp->if_index; 1622 ifm32->_ifm_spare1 = 0; 1623 ifm32->ifm_len = sizeof(*ifm32); 1624 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data); 1625 ifm32->_ifm_spare2 = 0; 1626 ifd = &ifm32->ifm_data; 1627 } else 1628 #endif 1629 { 1630 ifm->ifm_addrs = info->rti_addrs; 1631 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1632 ifm->ifm_index = ifp->if_index; 1633 ifm->_ifm_spare1 = 0; 1634 ifm->ifm_len = sizeof(*ifm); 1635 ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data); 1636 ifm->_ifm_spare2 = 0; 1637 ifd = &ifm->ifm_data; 1638 } 1639 1640 memcpy(ifd, src_ifd, sizeof(*ifd)); 1641 1642 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len)); 1643 } 1644 1645 static int 1646 sysctl_iflist_ifm(struct ifnet *ifp, const struct if_data *src_ifd, 1647 struct rt_addrinfo *info, struct walkarg *w, int len) 1648 { 1649 struct if_msghdr *ifm; 1650 struct if_data *ifd; 1651 1652 ifm = (struct if_msghdr *)w->w_tmem; 1653 1654 #ifdef COMPAT_FREEBSD32 1655 if (w->w_req->flags & SCTL_MASK32) { 1656 struct if_msghdr32 *ifm32; 1657 1658 ifm32 = (struct if_msghdr32 *)ifm; 1659 ifm32->ifm_addrs = info->rti_addrs; 1660 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1661 ifm32->ifm_index = ifp->if_index; 1662 ifm32->_ifm_spare1 = 0; 1663 ifd = &ifm32->ifm_data; 1664 } else 1665 #endif 1666 { 1667 ifm->ifm_addrs = info->rti_addrs; 1668 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1669 ifm->ifm_index = ifp->if_index; 1670 ifm->_ifm_spare1 = 0; 1671 ifd = &ifm->ifm_data; 1672 } 1673 1674 memcpy(ifd, src_ifd, sizeof(*ifd)); 1675 1676 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len)); 1677 } 1678 1679 static int 1680 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info, 1681 struct walkarg *w, int len) 1682 { 1683 struct ifa_msghdrl *ifam; 1684 struct if_data *ifd; 1685 1686 ifam = (struct ifa_msghdrl *)w->w_tmem; 1687 1688 #ifdef COMPAT_FREEBSD32 1689 if (w->w_req->flags & SCTL_MASK32) { 1690 struct ifa_msghdrl32 *ifam32; 1691 1692 ifam32 = (struct ifa_msghdrl32 *)ifam; 1693 ifam32->ifam_addrs = info->rti_addrs; 1694 ifam32->ifam_flags = ifa->ifa_flags; 1695 ifam32->ifam_index = ifa->ifa_ifp->if_index; 1696 ifam32->_ifam_spare1 = 0; 1697 ifam32->ifam_len = sizeof(*ifam32); 1698 ifam32->ifam_data_off = 1699 offsetof(struct ifa_msghdrl32, ifam_data); 1700 ifam32->ifam_metric = ifa->ifa_ifp->if_metric; 1701 ifd = &ifam32->ifam_data; 1702 } else 1703 #endif 1704 { 1705 ifam->ifam_addrs = info->rti_addrs; 1706 ifam->ifam_flags = ifa->ifa_flags; 1707 ifam->ifam_index = ifa->ifa_ifp->if_index; 1708 ifam->_ifam_spare1 = 0; 1709 ifam->ifam_len = sizeof(*ifam); 1710 ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data); 1711 ifam->ifam_metric = ifa->ifa_ifp->if_metric; 1712 ifd = &ifam->ifam_data; 1713 } 1714 1715 bzero(ifd, sizeof(*ifd)); 1716 ifd->ifi_datalen = sizeof(struct if_data); 1717 ifd->ifi_ipackets = counter_u64_fetch(ifa->ifa_ipackets); 1718 ifd->ifi_opackets = counter_u64_fetch(ifa->ifa_opackets); 1719 ifd->ifi_ibytes = counter_u64_fetch(ifa->ifa_ibytes); 1720 ifd->ifi_obytes = counter_u64_fetch(ifa->ifa_obytes); 1721 1722 /* Fixup if_data carp(4) vhid. */ 1723 if (carp_get_vhid_p != NULL) 1724 ifd->ifi_vhid = (*carp_get_vhid_p)(ifa); 1725 1726 return (SYSCTL_OUT(w->w_req, w->w_tmem, len)); 1727 } 1728 1729 static int 1730 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info, 1731 struct walkarg *w, int len) 1732 { 1733 struct ifa_msghdr *ifam; 1734 1735 ifam = (struct ifa_msghdr *)w->w_tmem; 1736 ifam->ifam_addrs = info->rti_addrs; 1737 ifam->ifam_flags = ifa->ifa_flags; 1738 ifam->ifam_index = ifa->ifa_ifp->if_index; 1739 ifam->_ifam_spare1 = 0; 1740 ifam->ifam_metric = ifa->ifa_ifp->if_metric; 1741 1742 return (SYSCTL_OUT(w->w_req, w->w_tmem, len)); 1743 } 1744 1745 static int 1746 sysctl_iflist(int af, struct walkarg *w) 1747 { 1748 struct ifnet *ifp; 1749 struct ifaddr *ifa; 1750 struct if_data ifd; 1751 struct rt_addrinfo info; 1752 int len, error = 0; 1753 struct sockaddr_storage ss; 1754 struct epoch_tracker et; 1755 1756 bzero((caddr_t)&info, sizeof(info)); 1757 bzero(&ifd, sizeof(ifd)); 1758 NET_EPOCH_ENTER_ET(et); 1759 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1760 if (w->w_arg && w->w_arg != ifp->if_index) 1761 continue; 1762 if_data_copy(ifp, &ifd); 1763 ifa = ifp->if_addr; 1764 info.rti_info[RTAX_IFP] = ifa->ifa_addr; 1765 error = rtsock_msg_buffer(RTM_IFINFO, &info, w, &len); 1766 if (error != 0) 1767 goto done; 1768 info.rti_info[RTAX_IFP] = NULL; 1769 if (w->w_req && w->w_tmem) { 1770 if (w->w_op == NET_RT_IFLISTL) 1771 error = sysctl_iflist_ifml(ifp, &ifd, &info, w, 1772 len); 1773 else 1774 error = sysctl_iflist_ifm(ifp, &ifd, &info, w, 1775 len); 1776 if (error) 1777 goto done; 1778 } 1779 while ((ifa = CK_STAILQ_NEXT(ifa, ifa_link)) != NULL) { 1780 if (af && af != ifa->ifa_addr->sa_family) 1781 continue; 1782 if (prison_if(w->w_req->td->td_ucred, 1783 ifa->ifa_addr) != 0) 1784 continue; 1785 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1786 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask( 1787 ifa->ifa_addr, ifa->ifa_netmask, &ss); 1788 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1789 error = rtsock_msg_buffer(RTM_NEWADDR, &info, w, &len); 1790 if (error != 0) 1791 goto done; 1792 if (w->w_req && w->w_tmem) { 1793 if (w->w_op == NET_RT_IFLISTL) 1794 error = sysctl_iflist_ifaml(ifa, &info, 1795 w, len); 1796 else 1797 error = sysctl_iflist_ifam(ifa, &info, 1798 w, len); 1799 if (error) 1800 goto done; 1801 } 1802 } 1803 info.rti_info[RTAX_IFA] = NULL; 1804 info.rti_info[RTAX_NETMASK] = NULL; 1805 info.rti_info[RTAX_BRD] = NULL; 1806 } 1807 done: 1808 NET_EPOCH_EXIT_ET(et); 1809 return (error); 1810 } 1811 1812 static int 1813 sysctl_ifmalist(int af, struct walkarg *w) 1814 { 1815 struct rt_addrinfo info; 1816 struct ifaddr *ifa; 1817 struct ifmultiaddr *ifma; 1818 struct ifnet *ifp; 1819 int error, len; 1820 1821 error = 0; 1822 bzero((caddr_t)&info, sizeof(info)); 1823 1824 IFNET_RLOCK_NOSLEEP(); 1825 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1826 if (w->w_arg && w->w_arg != ifp->if_index) 1827 continue; 1828 ifa = ifp->if_addr; 1829 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL; 1830 IF_ADDR_RLOCK(ifp); 1831 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1832 if (af && af != ifma->ifma_addr->sa_family) 1833 continue; 1834 if (prison_if(w->w_req->td->td_ucred, 1835 ifma->ifma_addr) != 0) 1836 continue; 1837 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1838 info.rti_info[RTAX_GATEWAY] = 1839 (ifma->ifma_addr->sa_family != AF_LINK) ? 1840 ifma->ifma_lladdr : NULL; 1841 error = rtsock_msg_buffer(RTM_NEWMADDR, &info, w, &len); 1842 if (error != 0) 1843 break; 1844 if (w->w_req && w->w_tmem) { 1845 struct ifma_msghdr *ifmam; 1846 1847 ifmam = (struct ifma_msghdr *)w->w_tmem; 1848 ifmam->ifmam_index = ifma->ifma_ifp->if_index; 1849 ifmam->ifmam_flags = 0; 1850 ifmam->ifmam_addrs = info.rti_addrs; 1851 ifmam->_ifmam_spare1 = 0; 1852 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1853 if (error != 0) 1854 break; 1855 } 1856 } 1857 IF_ADDR_RUNLOCK(ifp); 1858 if (error != 0) 1859 break; 1860 } 1861 IFNET_RUNLOCK_NOSLEEP(); 1862 return (error); 1863 } 1864 1865 static int 1866 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1867 { 1868 RIB_RLOCK_TRACKER; 1869 int *name = (int *)arg1; 1870 u_int namelen = arg2; 1871 struct rib_head *rnh = NULL; /* silence compiler. */ 1872 int i, lim, error = EINVAL; 1873 int fib = 0; 1874 u_char af; 1875 struct walkarg w; 1876 1877 name ++; 1878 namelen--; 1879 if (req->newptr) 1880 return (EPERM); 1881 if (name[1] == NET_RT_DUMP) { 1882 if (namelen == 3) 1883 fib = req->td->td_proc->p_fibnum; 1884 else if (namelen == 4) 1885 fib = (name[3] == RT_ALL_FIBS) ? 1886 req->td->td_proc->p_fibnum : name[3]; 1887 else 1888 return ((namelen < 3) ? EISDIR : ENOTDIR); 1889 if (fib < 0 || fib >= rt_numfibs) 1890 return (EINVAL); 1891 } else if (namelen != 3) 1892 return ((namelen < 3) ? EISDIR : ENOTDIR); 1893 af = name[0]; 1894 if (af > AF_MAX) 1895 return (EINVAL); 1896 bzero(&w, sizeof(w)); 1897 w.w_op = name[1]; 1898 w.w_arg = name[2]; 1899 w.w_req = req; 1900 1901 error = sysctl_wire_old_buffer(req, 0); 1902 if (error) 1903 return (error); 1904 1905 /* 1906 * Allocate reply buffer in advance. 1907 * All rtsock messages has maximum length of u_short. 1908 */ 1909 w.w_tmemsize = 65536; 1910 w.w_tmem = malloc(w.w_tmemsize, M_TEMP, M_WAITOK); 1911 1912 switch (w.w_op) { 1913 1914 case NET_RT_DUMP: 1915 case NET_RT_FLAGS: 1916 if (af == 0) { /* dump all tables */ 1917 i = 1; 1918 lim = AF_MAX; 1919 } else /* dump only one table */ 1920 i = lim = af; 1921 1922 /* 1923 * take care of llinfo entries, the caller must 1924 * specify an AF 1925 */ 1926 if (w.w_op == NET_RT_FLAGS && 1927 (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) { 1928 if (af != 0) 1929 error = lltable_sysctl_dumparp(af, w.w_req); 1930 else 1931 error = EINVAL; 1932 break; 1933 } 1934 /* 1935 * take care of routing entries 1936 */ 1937 for (error = 0; error == 0 && i <= lim; i++) { 1938 rnh = rt_tables_get_rnh(fib, i); 1939 if (rnh != NULL) { 1940 RIB_RLOCK(rnh); 1941 IFNET_RLOCK_NOSLEEP(); 1942 error = rnh->rnh_walktree(&rnh->head, 1943 sysctl_dumpentry, &w); 1944 IFNET_RUNLOCK_NOSLEEP(); 1945 RIB_RUNLOCK(rnh); 1946 } else if (af != 0) 1947 error = EAFNOSUPPORT; 1948 } 1949 break; 1950 1951 case NET_RT_IFLIST: 1952 case NET_RT_IFLISTL: 1953 error = sysctl_iflist(af, &w); 1954 break; 1955 1956 case NET_RT_IFMALIST: 1957 error = sysctl_ifmalist(af, &w); 1958 break; 1959 } 1960 1961 free(w.w_tmem, M_TEMP); 1962 return (error); 1963 } 1964 1965 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1966 1967 /* 1968 * Definitions of protocols supported in the ROUTE domain. 1969 */ 1970 1971 static struct domain routedomain; /* or at least forward */ 1972 1973 static struct protosw routesw[] = { 1974 { 1975 .pr_type = SOCK_RAW, 1976 .pr_domain = &routedomain, 1977 .pr_flags = PR_ATOMIC|PR_ADDR, 1978 .pr_output = route_output, 1979 .pr_ctlinput = raw_ctlinput, 1980 .pr_init = raw_init, 1981 .pr_usrreqs = &route_usrreqs 1982 } 1983 }; 1984 1985 static struct domain routedomain = { 1986 .dom_family = PF_ROUTE, 1987 .dom_name = "route", 1988 .dom_protosw = routesw, 1989 .dom_protoswNPROTOSW = &routesw[nitems(routesw)] 1990 }; 1991 1992 VNET_DOMAIN_SET(route);
Cache object: a679de13641c6e39bbf175f5b757451d
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