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