Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/net/rtsock.c
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1 /*- 2 * Copyright (c) 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 30 * $FreeBSD: releng/11.2/sys/net/rtsock.c 331722 2018-03-29 02:50:57Z eadler $ 31 */ 32 #include "opt_compat.h" 33 #include "opt_mpath.h" 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/jail.h> 39 #include <sys/kernel.h> 40 #include <sys/domain.h> 41 #include <sys/lock.h> 42 #include <sys/malloc.h> 43 #include <sys/mbuf.h> 44 #include <sys/priv.h> 45 #include <sys/proc.h> 46 #include <sys/protosw.h> 47 #include <sys/rwlock.h> 48 #include <sys/signalvar.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/sysctl.h> 52 #include <sys/systm.h> 53 54 #include <net/if.h> 55 #include <net/if_var.h> 56 #include <net/if_dl.h> 57 #include <net/if_llatbl.h> 58 #include <net/if_types.h> 59 #include <net/netisr.h> 60 #include <net/raw_cb.h> 61 #include <net/route.h> 62 #include <net/route_var.h> 63 #include <net/vnet.h> 64 65 #include <netinet/in.h> 66 #include <netinet/if_ether.h> 67 #include <netinet/ip_carp.h> 68 #ifdef INET6 69 #include <netinet6/ip6_var.h> 70 #include <netinet6/scope6_var.h> 71 #endif 72 73 #ifdef COMPAT_FREEBSD32 74 #include <sys/mount.h> 75 #include <compat/freebsd32/freebsd32.h> 76 77 struct if_msghdr32 { 78 uint16_t ifm_msglen; 79 uint8_t ifm_version; 80 uint8_t ifm_type; 81 int32_t ifm_addrs; 82 int32_t ifm_flags; 83 uint16_t ifm_index; 84 struct if_data ifm_data; 85 }; 86 87 struct if_msghdrl32 { 88 uint16_t ifm_msglen; 89 uint8_t ifm_version; 90 uint8_t ifm_type; 91 int32_t ifm_addrs; 92 int32_t ifm_flags; 93 uint16_t ifm_index; 94 uint16_t _ifm_spare1; 95 uint16_t ifm_len; 96 uint16_t ifm_data_off; 97 struct if_data ifm_data; 98 }; 99 100 struct ifa_msghdrl32 { 101 uint16_t ifam_msglen; 102 uint8_t ifam_version; 103 uint8_t ifam_type; 104 int32_t ifam_addrs; 105 int32_t ifam_flags; 106 uint16_t ifam_index; 107 uint16_t _ifam_spare1; 108 uint16_t ifam_len; 109 uint16_t ifam_data_off; 110 int32_t ifam_metric; 111 struct if_data ifam_data; 112 }; 113 114 #define SA_SIZE32(sa) \ 115 ( (((struct sockaddr *)(sa))->sa_len == 0) ? \ 116 sizeof(int) : \ 117 1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(int) - 1) ) ) 118 119 #endif /* COMPAT_FREEBSD32 */ 120 121 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 122 123 /* NB: these are not modified */ 124 static struct sockaddr route_src = { 2, PF_ROUTE, }; 125 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 126 127 /* These are external hooks for CARP. */ 128 int (*carp_get_vhid_p)(struct ifaddr *); 129 130 /* 131 * Used by rtsock/raw_input callback code to decide whether to filter the update 132 * notification to a socket bound to a particular FIB. 133 */ 134 #define RTS_FILTER_FIB M_PROTO8 135 136 typedef struct { 137 int ip_count; /* attached w/ AF_INET */ 138 int ip6_count; /* attached w/ AF_INET6 */ 139 int any_count; /* total attached */ 140 } route_cb_t; 141 static VNET_DEFINE(route_cb_t, route_cb); 142 #define V_route_cb VNET(route_cb) 143 144 struct mtx rtsock_mtx; 145 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF); 146 147 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx) 148 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx) 149 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED) 150 151 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, ""); 152 153 struct walkarg { 154 int w_tmemsize; 155 int w_op, w_arg; 156 caddr_t w_tmem; 157 struct sysctl_req *w_req; 158 }; 159 160 static void rts_input(struct mbuf *m); 161 static struct mbuf *rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo); 162 static int rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, 163 struct walkarg *w, int *plen); 164 static int rt_xaddrs(caddr_t cp, caddr_t cplim, 165 struct rt_addrinfo *rtinfo); 166 static int sysctl_dumpentry(struct radix_node *rn, void *vw); 167 static int sysctl_iflist(int af, struct walkarg *w); 168 static int sysctl_ifmalist(int af, struct walkarg *w); 169 static int route_output(struct mbuf *m, struct socket *so, ...); 170 static void rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out); 171 static void rt_dispatch(struct mbuf *, sa_family_t); 172 static struct sockaddr *rtsock_fix_netmask(struct sockaddr *dst, 173 struct sockaddr *smask, struct sockaddr_storage *dmask); 174 175 static struct netisr_handler rtsock_nh = { 176 .nh_name = "rtsock", 177 .nh_handler = rts_input, 178 .nh_proto = NETISR_ROUTE, 179 .nh_policy = NETISR_POLICY_SOURCE, 180 }; 181 182 static int 183 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS) 184 { 185 int error, qlimit; 186 187 netisr_getqlimit(&rtsock_nh, &qlimit); 188 error = sysctl_handle_int(oidp, &qlimit, 0, req); 189 if (error || !req->newptr) 190 return (error); 191 if (qlimit < 1) 192 return (EINVAL); 193 return (netisr_setqlimit(&rtsock_nh, qlimit)); 194 } 195 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW, 196 0, 0, sysctl_route_netisr_maxqlen, "I", 197 "maximum routing socket dispatch queue length"); 198 199 static void 200 vnet_rts_init(void) 201 { 202 int tmp; 203 204 if (IS_DEFAULT_VNET(curvnet)) { 205 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp)) 206 rtsock_nh.nh_qlimit = tmp; 207 netisr_register(&rtsock_nh); 208 } 209 #ifdef VIMAGE 210 else 211 netisr_register_vnet(&rtsock_nh); 212 #endif 213 } 214 VNET_SYSINIT(vnet_rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, 215 vnet_rts_init, 0); 216 217 #ifdef VIMAGE 218 static void 219 vnet_rts_uninit(void) 220 { 221 222 netisr_unregister_vnet(&rtsock_nh); 223 } 224 VNET_SYSUNINIT(vnet_rts_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, 225 vnet_rts_uninit, 0); 226 #endif 227 228 static int 229 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src, 230 struct rawcb *rp) 231 { 232 int fibnum; 233 234 KASSERT(m != NULL, ("%s: m is NULL", __func__)); 235 KASSERT(proto != NULL, ("%s: proto is NULL", __func__)); 236 KASSERT(rp != NULL, ("%s: rp is NULL", __func__)); 237 238 /* No filtering requested. */ 239 if ((m->m_flags & RTS_FILTER_FIB) == 0) 240 return (0); 241 242 /* Check if it is a rts and the fib matches the one of the socket. */ 243 fibnum = M_GETFIB(m); 244 if (proto->sp_family != PF_ROUTE || 245 rp->rcb_socket == NULL || 246 rp->rcb_socket->so_fibnum == fibnum) 247 return (0); 248 249 /* Filtering requested and no match, the socket shall be skipped. */ 250 return (1); 251 } 252 253 static void 254 rts_input(struct mbuf *m) 255 { 256 struct sockproto route_proto; 257 unsigned short *family; 258 struct m_tag *tag; 259 260 route_proto.sp_family = PF_ROUTE; 261 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL); 262 if (tag != NULL) { 263 family = (unsigned short *)(tag + 1); 264 route_proto.sp_protocol = *family; 265 m_tag_delete(m, tag); 266 } else 267 route_proto.sp_protocol = 0; 268 269 raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb); 270 } 271 272 /* 273 * It really doesn't make any sense at all for this code to share much 274 * with raw_usrreq.c, since its functionality is so restricted. XXX 275 */ 276 static void 277 rts_abort(struct socket *so) 278 { 279 280 raw_usrreqs.pru_abort(so); 281 } 282 283 static void 284 rts_close(struct socket *so) 285 { 286 287 raw_usrreqs.pru_close(so); 288 } 289 290 /* pru_accept is EOPNOTSUPP */ 291 292 static int 293 rts_attach(struct socket *so, int proto, struct thread *td) 294 { 295 struct rawcb *rp; 296 int error; 297 298 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL")); 299 300 /* XXX */ 301 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 302 303 so->so_pcb = (caddr_t)rp; 304 so->so_fibnum = td->td_proc->p_fibnum; 305 error = raw_attach(so, proto); 306 rp = sotorawcb(so); 307 if (error) { 308 so->so_pcb = NULL; 309 free(rp, M_PCB); 310 return error; 311 } 312 RTSOCK_LOCK(); 313 switch(rp->rcb_proto.sp_protocol) { 314 case AF_INET: 315 V_route_cb.ip_count++; 316 break; 317 case AF_INET6: 318 V_route_cb.ip6_count++; 319 break; 320 } 321 V_route_cb.any_count++; 322 RTSOCK_UNLOCK(); 323 soisconnected(so); 324 so->so_options |= SO_USELOOPBACK; 325 return 0; 326 } 327 328 static int 329 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 330 { 331 332 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */ 333 } 334 335 static int 336 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 337 { 338 339 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */ 340 } 341 342 /* pru_connect2 is EOPNOTSUPP */ 343 /* pru_control is EOPNOTSUPP */ 344 345 static void 346 rts_detach(struct socket *so) 347 { 348 struct rawcb *rp = sotorawcb(so); 349 350 KASSERT(rp != NULL, ("rts_detach: rp == NULL")); 351 352 RTSOCK_LOCK(); 353 switch(rp->rcb_proto.sp_protocol) { 354 case AF_INET: 355 V_route_cb.ip_count--; 356 break; 357 case AF_INET6: 358 V_route_cb.ip6_count--; 359 break; 360 } 361 V_route_cb.any_count--; 362 RTSOCK_UNLOCK(); 363 raw_usrreqs.pru_detach(so); 364 } 365 366 static int 367 rts_disconnect(struct socket *so) 368 { 369 370 return (raw_usrreqs.pru_disconnect(so)); 371 } 372 373 /* pru_listen is EOPNOTSUPP */ 374 375 static int 376 rts_peeraddr(struct socket *so, struct sockaddr **nam) 377 { 378 379 return (raw_usrreqs.pru_peeraddr(so, nam)); 380 } 381 382 /* pru_rcvd is EOPNOTSUPP */ 383 /* pru_rcvoob is EOPNOTSUPP */ 384 385 static int 386 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 387 struct mbuf *control, struct thread *td) 388 { 389 390 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 391 } 392 393 /* pru_sense is null */ 394 395 static int 396 rts_shutdown(struct socket *so) 397 { 398 399 return (raw_usrreqs.pru_shutdown(so)); 400 } 401 402 static int 403 rts_sockaddr(struct socket *so, struct sockaddr **nam) 404 { 405 406 return (raw_usrreqs.pru_sockaddr(so, nam)); 407 } 408 409 static struct pr_usrreqs route_usrreqs = { 410 .pru_abort = rts_abort, 411 .pru_attach = rts_attach, 412 .pru_bind = rts_bind, 413 .pru_connect = rts_connect, 414 .pru_detach = rts_detach, 415 .pru_disconnect = rts_disconnect, 416 .pru_peeraddr = rts_peeraddr, 417 .pru_send = rts_send, 418 .pru_shutdown = rts_shutdown, 419 .pru_sockaddr = rts_sockaddr, 420 .pru_close = rts_close, 421 }; 422 423 #ifndef _SOCKADDR_UNION_DEFINED 424 #define _SOCKADDR_UNION_DEFINED 425 /* 426 * The union of all possible address formats we handle. 427 */ 428 union sockaddr_union { 429 struct sockaddr sa; 430 struct sockaddr_in sin; 431 struct sockaddr_in6 sin6; 432 }; 433 #endif /* _SOCKADDR_UNION_DEFINED */ 434 435 static int 436 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp, 437 struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred) 438 { 439 440 /* First, see if the returned address is part of the jail. */ 441 if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) { 442 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 443 return (0); 444 } 445 446 switch (info->rti_info[RTAX_DST]->sa_family) { 447 #ifdef INET 448 case AF_INET: 449 { 450 struct in_addr ia; 451 struct ifaddr *ifa; 452 int found; 453 454 found = 0; 455 /* 456 * Try to find an address on the given outgoing interface 457 * that belongs to the jail. 458 */ 459 IF_ADDR_RLOCK(ifp); 460 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 461 struct sockaddr *sa; 462 sa = ifa->ifa_addr; 463 if (sa->sa_family != AF_INET) 464 continue; 465 ia = ((struct sockaddr_in *)sa)->sin_addr; 466 if (prison_check_ip4(cred, &ia) == 0) { 467 found = 1; 468 break; 469 } 470 } 471 IF_ADDR_RUNLOCK(ifp); 472 if (!found) { 473 /* 474 * As a last resort return the 'default' jail address. 475 */ 476 ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)-> 477 sin_addr; 478 if (prison_get_ip4(cred, &ia) != 0) 479 return (ESRCH); 480 } 481 bzero(&saun->sin, sizeof(struct sockaddr_in)); 482 saun->sin.sin_len = sizeof(struct sockaddr_in); 483 saun->sin.sin_family = AF_INET; 484 saun->sin.sin_addr.s_addr = ia.s_addr; 485 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin; 486 break; 487 } 488 #endif 489 #ifdef INET6 490 case AF_INET6: 491 { 492 struct in6_addr ia6; 493 struct ifaddr *ifa; 494 int found; 495 496 found = 0; 497 /* 498 * Try to find an address on the given outgoing interface 499 * that belongs to the jail. 500 */ 501 IF_ADDR_RLOCK(ifp); 502 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 503 struct sockaddr *sa; 504 sa = ifa->ifa_addr; 505 if (sa->sa_family != AF_INET6) 506 continue; 507 bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr, 508 &ia6, sizeof(struct in6_addr)); 509 if (prison_check_ip6(cred, &ia6) == 0) { 510 found = 1; 511 break; 512 } 513 } 514 IF_ADDR_RUNLOCK(ifp); 515 if (!found) { 516 /* 517 * As a last resort return the 'default' jail address. 518 */ 519 ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)-> 520 sin6_addr; 521 if (prison_get_ip6(cred, &ia6) != 0) 522 return (ESRCH); 523 } 524 bzero(&saun->sin6, sizeof(struct sockaddr_in6)); 525 saun->sin6.sin6_len = sizeof(struct sockaddr_in6); 526 saun->sin6.sin6_family = AF_INET6; 527 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr)); 528 if (sa6_recoverscope(&saun->sin6) != 0) 529 return (ESRCH); 530 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6; 531 break; 532 } 533 #endif 534 default: 535 return (ESRCH); 536 } 537 return (0); 538 } 539 540 /*ARGSUSED*/ 541 static int 542 route_output(struct mbuf *m, struct socket *so, ...) 543 { 544 struct rt_msghdr *rtm = NULL; 545 struct rtentry *rt = NULL; 546 struct rib_head *rnh; 547 struct rt_addrinfo info; 548 struct sockaddr_storage ss; 549 #ifdef INET6 550 struct sockaddr_in6 *sin6; 551 int i, rti_need_deembed = 0; 552 #endif 553 int alloc_len = 0, len, error = 0, fibnum; 554 struct ifnet *ifp = NULL; 555 union sockaddr_union saun; 556 sa_family_t saf = AF_UNSPEC; 557 struct rawcb *rp = NULL; 558 struct walkarg w; 559 560 fibnum = so->so_fibnum; 561 562 #define senderr(e) { error = e; goto flush;} 563 if (m == NULL || ((m->m_len < sizeof(long)) && 564 (m = m_pullup(m, sizeof(long))) == NULL)) 565 return (ENOBUFS); 566 if ((m->m_flags & M_PKTHDR) == 0) 567 panic("route_output"); 568 len = m->m_pkthdr.len; 569 if (len < sizeof(*rtm) || 570 len != mtod(m, struct rt_msghdr *)->rtm_msglen) 571 senderr(EINVAL); 572 573 /* 574 * Most of current messages are in range 200-240 bytes, 575 * minimize possible re-allocation on reply using larger size 576 * buffer aligned on 1k boundaty. 577 */ 578 alloc_len = roundup2(len, 1024); 579 if ((rtm = malloc(alloc_len, M_TEMP, M_NOWAIT)) == NULL) 580 senderr(ENOBUFS); 581 582 m_copydata(m, 0, len, (caddr_t)rtm); 583 bzero(&info, sizeof(info)); 584 bzero(&w, sizeof(w)); 585 586 if (rtm->rtm_version != RTM_VERSION) { 587 /* Do not touch message since format is unknown */ 588 free(rtm, M_TEMP); 589 rtm = NULL; 590 senderr(EPROTONOSUPPORT); 591 } 592 593 /* 594 * Starting from here, it is possible 595 * to alter original message and insert 596 * caller PID and error value. 597 */ 598 599 rtm->rtm_pid = curproc->p_pid; 600 info.rti_addrs = rtm->rtm_addrs; 601 602 info.rti_mflags = rtm->rtm_inits; 603 info.rti_rmx = &rtm->rtm_rmx; 604 605 /* 606 * rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6 607 * link-local address because rtrequest requires addresses with 608 * embedded scope id. 609 */ 610 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) 611 senderr(EINVAL); 612 613 info.rti_flags = rtm->rtm_flags; 614 if (info.rti_info[RTAX_DST] == NULL || 615 info.rti_info[RTAX_DST]->sa_family >= AF_MAX || 616 (info.rti_info[RTAX_GATEWAY] != NULL && 617 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) 618 senderr(EINVAL); 619 saf = info.rti_info[RTAX_DST]->sa_family; 620 /* 621 * Verify that the caller has the appropriate privilege; RTM_GET 622 * is the only operation the non-superuser is allowed. 623 */ 624 if (rtm->rtm_type != RTM_GET) { 625 error = priv_check(curthread, PRIV_NET_ROUTE); 626 if (error) 627 senderr(error); 628 } 629 630 /* 631 * The given gateway address may be an interface address. 632 * For example, issuing a "route change" command on a route 633 * entry that was created from a tunnel, and the gateway 634 * address given is the local end point. In this case the 635 * RTF_GATEWAY flag must be cleared or the destination will 636 * not be reachable even though there is no error message. 637 */ 638 if (info.rti_info[RTAX_GATEWAY] != NULL && 639 info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) { 640 struct rt_addrinfo ginfo; 641 struct sockaddr *gdst; 642 643 bzero(&ginfo, sizeof(ginfo)); 644 bzero(&ss, sizeof(ss)); 645 ss.ss_len = sizeof(ss); 646 647 ginfo.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ss; 648 gdst = info.rti_info[RTAX_GATEWAY]; 649 650 /* 651 * A host route through the loopback interface is 652 * installed for each interface adddress. In pre 8.0 653 * releases the interface address of a PPP link type 654 * is not reachable locally. This behavior is fixed as 655 * part of the new L2/L3 redesign and rewrite work. The 656 * signature of this interface address route is the 657 * AF_LINK sa_family type of the rt_gateway, and the 658 * rt_ifp has the IFF_LOOPBACK flag set. 659 */ 660 if (rib_lookup_info(fibnum, gdst, NHR_REF, 0, &ginfo) == 0) { 661 if (ss.ss_family == AF_LINK && 662 ginfo.rti_ifp->if_flags & IFF_LOOPBACK) { 663 info.rti_flags &= ~RTF_GATEWAY; 664 info.rti_flags |= RTF_GWFLAG_COMPAT; 665 } 666 rib_free_info(&ginfo); 667 } 668 } 669 670 switch (rtm->rtm_type) { 671 struct rtentry *saved_nrt; 672 673 case RTM_ADD: 674 case RTM_CHANGE: 675 if (info.rti_info[RTAX_GATEWAY] == NULL) 676 senderr(EINVAL); 677 saved_nrt = NULL; 678 679 /* support for new ARP code */ 680 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK && 681 (rtm->rtm_flags & RTF_LLDATA) != 0) { 682 error = lla_rt_output(rtm, &info); 683 #ifdef INET6 684 if (error == 0) 685 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 686 #endif 687 break; 688 } 689 error = rtrequest1_fib(rtm->rtm_type, &info, &saved_nrt, 690 fibnum); 691 if (error == 0 && saved_nrt != NULL) { 692 #ifdef INET6 693 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 694 #endif 695 RT_LOCK(saved_nrt); 696 rtm->rtm_index = saved_nrt->rt_ifp->if_index; 697 RT_REMREF(saved_nrt); 698 RT_UNLOCK(saved_nrt); 699 } 700 break; 701 702 case RTM_DELETE: 703 saved_nrt = NULL; 704 /* support for new ARP code */ 705 if (info.rti_info[RTAX_GATEWAY] && 706 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 707 (rtm->rtm_flags & RTF_LLDATA) != 0) { 708 error = lla_rt_output(rtm, &info); 709 #ifdef INET6 710 if (error == 0) 711 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 712 #endif 713 break; 714 } 715 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, fibnum); 716 if (error == 0) { 717 RT_LOCK(saved_nrt); 718 rt = saved_nrt; 719 goto report; 720 } 721 #ifdef INET6 722 /* rt_msg2() will not be used when RTM_DELETE fails. */ 723 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 724 #endif 725 break; 726 727 case RTM_GET: 728 rnh = rt_tables_get_rnh(fibnum, saf); 729 if (rnh == NULL) 730 senderr(EAFNOSUPPORT); 731 732 RIB_RLOCK(rnh); 733 734 if (info.rti_info[RTAX_NETMASK] == NULL && 735 rtm->rtm_type == RTM_GET) { 736 /* 737 * Provide longest prefix match for 738 * address lookup (no mask). 739 * 'route -n get addr' 740 */ 741 rt = (struct rtentry *) rnh->rnh_matchaddr( 742 info.rti_info[RTAX_DST], &rnh->head); 743 } else 744 rt = (struct rtentry *) rnh->rnh_lookup( 745 info.rti_info[RTAX_DST], 746 info.rti_info[RTAX_NETMASK], &rnh->head); 747 748 if (rt == NULL) { 749 RIB_RUNLOCK(rnh); 750 senderr(ESRCH); 751 } 752 #ifdef RADIX_MPATH 753 /* 754 * for RTM_CHANGE/LOCK, if we got multipath routes, 755 * we require users to specify a matching RTAX_GATEWAY. 756 * 757 * for RTM_GET, gate is optional even with multipath. 758 * if gate == NULL the first match is returned. 759 * (no need to call rt_mpath_matchgate if gate == NULL) 760 */ 761 if (rt_mpath_capable(rnh) && 762 (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) { 763 rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]); 764 if (!rt) { 765 RIB_RUNLOCK(rnh); 766 senderr(ESRCH); 767 } 768 } 769 #endif 770 /* 771 * If performing proxied L2 entry insertion, and 772 * the actual PPP host entry is found, perform 773 * another search to retrieve the prefix route of 774 * the local end point of the PPP link. 775 */ 776 if (rtm->rtm_flags & RTF_ANNOUNCE) { 777 struct sockaddr laddr; 778 779 if (rt->rt_ifp != NULL && 780 rt->rt_ifp->if_type == IFT_PROPVIRTUAL) { 781 struct ifaddr *ifa; 782 783 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1, 784 RT_ALL_FIBS); 785 if (ifa != NULL) 786 rt_maskedcopy(ifa->ifa_addr, 787 &laddr, 788 ifa->ifa_netmask); 789 } else 790 rt_maskedcopy(rt->rt_ifa->ifa_addr, 791 &laddr, 792 rt->rt_ifa->ifa_netmask); 793 /* 794 * refactor rt and no lock operation necessary 795 */ 796 rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, 797 &rnh->head); 798 if (rt == NULL) { 799 RIB_RUNLOCK(rnh); 800 senderr(ESRCH); 801 } 802 } 803 RT_LOCK(rt); 804 RT_ADDREF(rt); 805 RIB_RUNLOCK(rnh); 806 807 report: 808 RT_LOCK_ASSERT(rt); 809 if ((rt->rt_flags & RTF_HOST) == 0 810 ? jailed_without_vnet(curthread->td_ucred) 811 : prison_if(curthread->td_ucred, 812 rt_key(rt)) != 0) { 813 RT_UNLOCK(rt); 814 senderr(ESRCH); 815 } 816 info.rti_info[RTAX_DST] = rt_key(rt); 817 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 818 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt), 819 rt_mask(rt), &ss); 820 info.rti_info[RTAX_GENMASK] = 0; 821 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 822 ifp = rt->rt_ifp; 823 if (ifp) { 824 info.rti_info[RTAX_IFP] = 825 ifp->if_addr->ifa_addr; 826 error = rtm_get_jailed(&info, ifp, rt, 827 &saun, curthread->td_ucred); 828 if (error != 0) { 829 RT_UNLOCK(rt); 830 senderr(error); 831 } 832 if (ifp->if_flags & IFF_POINTOPOINT) 833 info.rti_info[RTAX_BRD] = 834 rt->rt_ifa->ifa_dstaddr; 835 rtm->rtm_index = ifp->if_index; 836 } else { 837 info.rti_info[RTAX_IFP] = NULL; 838 info.rti_info[RTAX_IFA] = NULL; 839 } 840 } else if ((ifp = rt->rt_ifp) != NULL) { 841 rtm->rtm_index = ifp->if_index; 842 } 843 844 /* Check if we need to realloc storage */ 845 rtsock_msg_buffer(rtm->rtm_type, &info, NULL, &len); 846 if (len > alloc_len) { 847 struct rt_msghdr *new_rtm; 848 new_rtm = malloc(len, M_TEMP, M_NOWAIT); 849 if (new_rtm == NULL) { 850 RT_UNLOCK(rt); 851 senderr(ENOBUFS); 852 } 853 bcopy(rtm, new_rtm, rtm->rtm_msglen); 854 free(rtm, M_TEMP); 855 rtm = new_rtm; 856 alloc_len = len; 857 } 858 859 w.w_tmem = (caddr_t)rtm; 860 w.w_tmemsize = alloc_len; 861 rtsock_msg_buffer(rtm->rtm_type, &info, &w, &len); 862 863 if (rt->rt_flags & RTF_GWFLAG_COMPAT) 864 rtm->rtm_flags = RTF_GATEWAY | 865 (rt->rt_flags & ~RTF_GWFLAG_COMPAT); 866 else 867 rtm->rtm_flags = rt->rt_flags; 868 rt_getmetrics(rt, &rtm->rtm_rmx); 869 rtm->rtm_addrs = info.rti_addrs; 870 871 RT_UNLOCK(rt); 872 break; 873 874 default: 875 senderr(EOPNOTSUPP); 876 } 877 878 flush: 879 if (rt != NULL) 880 RTFREE(rt); 881 /* 882 * Check to see if we don't want our own messages. 883 */ 884 if ((so->so_options & SO_USELOOPBACK) == 0) { 885 if (V_route_cb.any_count <= 1) { 886 if (rtm != NULL) 887 free(rtm, M_TEMP); 888 m_freem(m); 889 return (error); 890 } 891 /* There is another listener, so construct message */ 892 rp = sotorawcb(so); 893 } 894 895 if (rtm != NULL) { 896 #ifdef INET6 897 if (rti_need_deembed) { 898 /* sin6_scope_id is recovered before sending rtm. */ 899 sin6 = (struct sockaddr_in6 *)&ss; 900 for (i = 0; i < RTAX_MAX; i++) { 901 if (info.rti_info[i] == NULL) 902 continue; 903 if (info.rti_info[i]->sa_family != AF_INET6) 904 continue; 905 bcopy(info.rti_info[i], sin6, sizeof(*sin6)); 906 if (sa6_recoverscope(sin6) == 0) 907 bcopy(sin6, info.rti_info[i], 908 sizeof(*sin6)); 909 } 910 } 911 #endif 912 if (error != 0) 913 rtm->rtm_errno = error; 914 else 915 rtm->rtm_flags |= RTF_DONE; 916 917 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 918 if (m->m_pkthdr.len < rtm->rtm_msglen) { 919 m_freem(m); 920 m = NULL; 921 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 922 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 923 924 free(rtm, M_TEMP); 925 } 926 if (m != NULL) { 927 M_SETFIB(m, fibnum); 928 m->m_flags |= RTS_FILTER_FIB; 929 if (rp) { 930 /* 931 * XXX insure we don't get a copy by 932 * invalidating our protocol 933 */ 934 unsigned short family = rp->rcb_proto.sp_family; 935 rp->rcb_proto.sp_family = 0; 936 rt_dispatch(m, saf); 937 rp->rcb_proto.sp_family = family; 938 } else 939 rt_dispatch(m, saf); 940 } 941 942 return (error); 943 } 944 945 static void 946 rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out) 947 { 948 949 bzero(out, sizeof(*out)); 950 out->rmx_mtu = rt->rt_mtu; 951 out->rmx_weight = rt->rt_weight; 952 out->rmx_pksent = counter_u64_fetch(rt->rt_pksent); 953 /* Kernel -> userland timebase conversion. */ 954 out->rmx_expire = rt->rt_expire ? 955 rt->rt_expire - time_uptime + time_second : 0; 956 } 957 958 /* 959 * Extract the addresses of the passed sockaddrs. 960 * Do a little sanity checking so as to avoid bad memory references. 961 * This data is derived straight from userland. 962 */ 963 static int 964 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 965 { 966 struct sockaddr *sa; 967 int i; 968 969 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 970 if ((rtinfo->rti_addrs & (1 << i)) == 0) 971 continue; 972 sa = (struct sockaddr *)cp; 973 /* 974 * It won't fit. 975 */ 976 if (cp + sa->sa_len > cplim) 977 return (EINVAL); 978 /* 979 * there are no more.. quit now 980 * If there are more bits, they are in error. 981 * I've seen this. route(1) can evidently generate these. 982 * This causes kernel to core dump. 983 * for compatibility, If we see this, point to a safe address. 984 */ 985 if (sa->sa_len == 0) { 986 rtinfo->rti_info[i] = &sa_zero; 987 return (0); /* should be EINVAL but for compat */ 988 } 989 /* accept it */ 990 #ifdef INET6 991 if (sa->sa_family == AF_INET6) 992 sa6_embedscope((struct sockaddr_in6 *)sa, 993 V_ip6_use_defzone); 994 #endif 995 rtinfo->rti_info[i] = sa; 996 cp += SA_SIZE(sa); 997 } 998 return (0); 999 } 1000 1001 /* 1002 * Fill in @dmask with valid netmask leaving original @smask 1003 * intact. Mostly used with radix netmasks. 1004 */ 1005 static struct sockaddr * 1006 rtsock_fix_netmask(struct sockaddr *dst, struct sockaddr *smask, 1007 struct sockaddr_storage *dmask) 1008 { 1009 if (dst == NULL || smask == NULL) 1010 return (NULL); 1011 1012 memset(dmask, 0, dst->sa_len); 1013 memcpy(dmask, smask, smask->sa_len); 1014 dmask->ss_len = dst->sa_len; 1015 dmask->ss_family = dst->sa_family; 1016 1017 return ((struct sockaddr *)dmask); 1018 } 1019 1020 /* 1021 * Writes information related to @rtinfo object to newly-allocated mbuf. 1022 * Assumes MCLBYTES is enough to construct any message. 1023 * Used for OS notifications of vaious events (if/ifa announces,etc) 1024 * 1025 * Returns allocated mbuf or NULL on failure. 1026 */ 1027 static struct mbuf * 1028 rtsock_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 1029 { 1030 struct rt_msghdr *rtm; 1031 struct mbuf *m; 1032 int i; 1033 struct sockaddr *sa; 1034 #ifdef INET6 1035 struct sockaddr_storage ss; 1036 struct sockaddr_in6 *sin6; 1037 #endif 1038 int len, dlen; 1039 1040 switch (type) { 1041 1042 case RTM_DELADDR: 1043 case RTM_NEWADDR: 1044 len = sizeof(struct ifa_msghdr); 1045 break; 1046 1047 case RTM_DELMADDR: 1048 case RTM_NEWMADDR: 1049 len = sizeof(struct ifma_msghdr); 1050 break; 1051 1052 case RTM_IFINFO: 1053 len = sizeof(struct if_msghdr); 1054 break; 1055 1056 case RTM_IFANNOUNCE: 1057 case RTM_IEEE80211: 1058 len = sizeof(struct if_announcemsghdr); 1059 break; 1060 1061 default: 1062 len = sizeof(struct rt_msghdr); 1063 } 1064 1065 /* XXXGL: can we use MJUMPAGESIZE cluster here? */ 1066 KASSERT(len <= MCLBYTES, ("%s: message too big", __func__)); 1067 if (len > MHLEN) 1068 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1069 else 1070 m = m_gethdr(M_NOWAIT, MT_DATA); 1071 if (m == NULL) 1072 return (m); 1073 1074 m->m_pkthdr.len = m->m_len = len; 1075 rtm = mtod(m, struct rt_msghdr *); 1076 bzero((caddr_t)rtm, len); 1077 for (i = 0; i < RTAX_MAX; i++) { 1078 if ((sa = rtinfo->rti_info[i]) == NULL) 1079 continue; 1080 rtinfo->rti_addrs |= (1 << i); 1081 dlen = SA_SIZE(sa); 1082 #ifdef INET6 1083 if (V_deembed_scopeid && sa->sa_family == AF_INET6) { 1084 sin6 = (struct sockaddr_in6 *)&ss; 1085 bcopy(sa, sin6, sizeof(*sin6)); 1086 if (sa6_recoverscope(sin6) == 0) 1087 sa = (struct sockaddr *)sin6; 1088 } 1089 #endif 1090 m_copyback(m, len, dlen, (caddr_t)sa); 1091 len += dlen; 1092 } 1093 if (m->m_pkthdr.len != len) { 1094 m_freem(m); 1095 return (NULL); 1096 } 1097 rtm->rtm_msglen = len; 1098 rtm->rtm_version = RTM_VERSION; 1099 rtm->rtm_type = type; 1100 return (m); 1101 } 1102 1103 /* 1104 * Writes information related to @rtinfo object to preallocated buffer. 1105 * Stores needed size in @plen. If @w is NULL, calculates size without 1106 * writing. 1107 * Used for sysctl dumps and rtsock answers (RTM_DEL/RTM_GET) generation. 1108 * 1109 * Returns 0 on success. 1110 * 1111 */ 1112 static int 1113 rtsock_msg_buffer(int type, struct rt_addrinfo *rtinfo, struct walkarg *w, int *plen) 1114 { 1115 int i; 1116 int len, buflen = 0, dlen; 1117 caddr_t cp = NULL; 1118 struct rt_msghdr *rtm = NULL; 1119 #ifdef INET6 1120 struct sockaddr_storage ss; 1121 struct sockaddr_in6 *sin6; 1122 #endif 1123 #ifdef COMPAT_FREEBSD32 1124 bool compat32 = false; 1125 #endif 1126 1127 switch (type) { 1128 1129 case RTM_DELADDR: 1130 case RTM_NEWADDR: 1131 if (w != NULL && w->w_op == NET_RT_IFLISTL) { 1132 #ifdef COMPAT_FREEBSD32 1133 if (w->w_req->flags & SCTL_MASK32) { 1134 len = sizeof(struct ifa_msghdrl32); 1135 compat32 = true; 1136 } else 1137 #endif 1138 len = sizeof(struct ifa_msghdrl); 1139 } else 1140 len = sizeof(struct ifa_msghdr); 1141 break; 1142 1143 case RTM_IFINFO: 1144 #ifdef COMPAT_FREEBSD32 1145 if (w != NULL && w->w_req->flags & SCTL_MASK32) { 1146 if (w->w_op == NET_RT_IFLISTL) 1147 len = sizeof(struct if_msghdrl32); 1148 else 1149 len = sizeof(struct if_msghdr32); 1150 compat32 = true; 1151 break; 1152 } 1153 #endif 1154 if (w != NULL && w->w_op == NET_RT_IFLISTL) 1155 len = sizeof(struct if_msghdrl); 1156 else 1157 len = sizeof(struct if_msghdr); 1158 break; 1159 1160 case RTM_NEWMADDR: 1161 len = sizeof(struct ifma_msghdr); 1162 break; 1163 1164 default: 1165 len = sizeof(struct rt_msghdr); 1166 } 1167 1168 if (w != NULL) { 1169 rtm = (struct rt_msghdr *)w->w_tmem; 1170 buflen = w->w_tmemsize - len; 1171 cp = (caddr_t)w->w_tmem + len; 1172 } 1173 1174 rtinfo->rti_addrs = 0; 1175 for (i = 0; i < RTAX_MAX; i++) { 1176 struct sockaddr *sa; 1177 1178 if ((sa = rtinfo->rti_info[i]) == NULL) 1179 continue; 1180 rtinfo->rti_addrs |= (1 << i); 1181 #ifdef COMPAT_FREEBSD32 1182 if (compat32) 1183 dlen = SA_SIZE32(sa); 1184 else 1185 #endif 1186 dlen = SA_SIZE(sa); 1187 if (cp != NULL && buflen >= dlen) { 1188 #ifdef INET6 1189 if (V_deembed_scopeid && sa->sa_family == AF_INET6) { 1190 sin6 = (struct sockaddr_in6 *)&ss; 1191 bcopy(sa, sin6, sizeof(*sin6)); 1192 if (sa6_recoverscope(sin6) == 0) 1193 sa = (struct sockaddr *)sin6; 1194 } 1195 #endif 1196 bcopy((caddr_t)sa, cp, (unsigned)dlen); 1197 cp += dlen; 1198 buflen -= dlen; 1199 } else if (cp != NULL) { 1200 /* 1201 * Buffer too small. Count needed size 1202 * and return with error. 1203 */ 1204 cp = NULL; 1205 } 1206 1207 len += dlen; 1208 } 1209 1210 if (cp != NULL) { 1211 dlen = ALIGN(len) - len; 1212 if (buflen < dlen) 1213 cp = NULL; 1214 else 1215 buflen -= dlen; 1216 } 1217 len = ALIGN(len); 1218 1219 if (cp != NULL) { 1220 /* fill header iff buffer is large enough */ 1221 rtm->rtm_version = RTM_VERSION; 1222 rtm->rtm_type = type; 1223 rtm->rtm_msglen = len; 1224 } 1225 1226 *plen = len; 1227 1228 if (w != NULL && cp == NULL) 1229 return (ENOBUFS); 1230 1231 return (0); 1232 } 1233 1234 /* 1235 * This routine is called to generate a message from the routing 1236 * socket indicating that a redirect has occurred, a routing lookup 1237 * has failed, or that a protocol has detected timeouts to a particular 1238 * destination. 1239 */ 1240 void 1241 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error, 1242 int fibnum) 1243 { 1244 struct rt_msghdr *rtm; 1245 struct mbuf *m; 1246 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1247 1248 if (V_route_cb.any_count == 0) 1249 return; 1250 m = rtsock_msg_mbuf(type, rtinfo); 1251 if (m == NULL) 1252 return; 1253 1254 if (fibnum != RT_ALL_FIBS) { 1255 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out " 1256 "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs)); 1257 M_SETFIB(m, fibnum); 1258 m->m_flags |= RTS_FILTER_FIB; 1259 } 1260 1261 rtm = mtod(m, struct rt_msghdr *); 1262 rtm->rtm_flags = RTF_DONE | flags; 1263 rtm->rtm_errno = error; 1264 rtm->rtm_addrs = rtinfo->rti_addrs; 1265 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1266 } 1267 1268 void 1269 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 1270 { 1271 1272 rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS); 1273 } 1274 1275 /* 1276 * This routine is called to generate a message from the routing 1277 * socket indicating that the status of a network interface has changed. 1278 */ 1279 void 1280 rt_ifmsg(struct ifnet *ifp) 1281 { 1282 struct if_msghdr *ifm; 1283 struct mbuf *m; 1284 struct rt_addrinfo info; 1285 1286 if (V_route_cb.any_count == 0) 1287 return; 1288 bzero((caddr_t)&info, sizeof(info)); 1289 m = rtsock_msg_mbuf(RTM_IFINFO, &info); 1290 if (m == NULL) 1291 return; 1292 ifm = mtod(m, struct if_msghdr *); 1293 ifm->ifm_index = ifp->if_index; 1294 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1295 if_data_copy(ifp, &ifm->ifm_data); 1296 ifm->ifm_addrs = 0; 1297 rt_dispatch(m, AF_UNSPEC); 1298 } 1299 1300 /* 1301 * Announce interface address arrival/withdraw. 1302 * Please do not call directly, use rt_addrmsg(). 1303 * Assume input data to be valid. 1304 * Returns 0 on success. 1305 */ 1306 int 1307 rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum) 1308 { 1309 struct rt_addrinfo info; 1310 struct sockaddr *sa; 1311 int ncmd; 1312 struct mbuf *m; 1313 struct ifa_msghdr *ifam; 1314 struct ifnet *ifp = ifa->ifa_ifp; 1315 struct sockaddr_storage ss; 1316 1317 if (V_route_cb.any_count == 0) 1318 return (0); 1319 1320 ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 1321 1322 bzero((caddr_t)&info, sizeof(info)); 1323 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1324 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 1325 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask( 1326 info.rti_info[RTAX_IFP], ifa->ifa_netmask, &ss); 1327 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1328 if ((m = rtsock_msg_mbuf(ncmd, &info)) == NULL) 1329 return (ENOBUFS); 1330 ifam = mtod(m, struct ifa_msghdr *); 1331 ifam->ifam_index = ifp->if_index; 1332 ifam->ifam_metric = ifa->ifa_ifp->if_metric; 1333 ifam->ifam_flags = ifa->ifa_flags; 1334 ifam->ifam_addrs = info.rti_addrs; 1335 1336 if (fibnum != RT_ALL_FIBS) { 1337 M_SETFIB(m, fibnum); 1338 m->m_flags |= RTS_FILTER_FIB; 1339 } 1340 1341 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1342 1343 return (0); 1344 } 1345 1346 /* 1347 * Announce route addition/removal. 1348 * Please do not call directly, use rt_routemsg(). 1349 * Note that @rt data MAY be inconsistent/invalid: 1350 * if some userland app sends us "invalid" route message (invalid mask, 1351 * no dst, wrong address families, etc...) we need to pass it back 1352 * to app (and any other rtsock consumers) with rtm_errno field set to 1353 * non-zero value. 1354 * 1355 * Returns 0 on success. 1356 */ 1357 int 1358 rtsock_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt, 1359 int fibnum) 1360 { 1361 struct rt_addrinfo info; 1362 struct sockaddr *sa; 1363 struct mbuf *m; 1364 struct rt_msghdr *rtm; 1365 struct sockaddr_storage ss; 1366 1367 if (V_route_cb.any_count == 0) 1368 return (0); 1369 1370 bzero((caddr_t)&info, sizeof(info)); 1371 info.rti_info[RTAX_DST] = sa = rt_key(rt); 1372 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(sa, rt_mask(rt), &ss); 1373 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1374 if ((m = rtsock_msg_mbuf(cmd, &info)) == NULL) 1375 return (ENOBUFS); 1376 rtm = mtod(m, struct rt_msghdr *); 1377 rtm->rtm_index = ifp->if_index; 1378 rtm->rtm_flags |= rt->rt_flags; 1379 rtm->rtm_errno = error; 1380 rtm->rtm_addrs = info.rti_addrs; 1381 1382 if (fibnum != RT_ALL_FIBS) { 1383 M_SETFIB(m, fibnum); 1384 m->m_flags |= RTS_FILTER_FIB; 1385 } 1386 1387 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1388 1389 return (0); 1390 } 1391 1392 /* 1393 * This is the analogue to the rt_newaddrmsg which performs the same 1394 * function but for multicast group memberhips. This is easier since 1395 * there is no route state to worry about. 1396 */ 1397 void 1398 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1399 { 1400 struct rt_addrinfo info; 1401 struct mbuf *m = NULL; 1402 struct ifnet *ifp = ifma->ifma_ifp; 1403 struct ifma_msghdr *ifmam; 1404 1405 if (V_route_cb.any_count == 0) 1406 return; 1407 1408 bzero((caddr_t)&info, sizeof(info)); 1409 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1410 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL; 1411 /* 1412 * If a link-layer address is present, present it as a ``gateway'' 1413 * (similarly to how ARP entries, e.g., are presented). 1414 */ 1415 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr; 1416 m = rtsock_msg_mbuf(cmd, &info); 1417 if (m == NULL) 1418 return; 1419 ifmam = mtod(m, struct ifma_msghdr *); 1420 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n", 1421 __func__)); 1422 ifmam->ifmam_index = ifp->if_index; 1423 ifmam->ifmam_addrs = info.rti_addrs; 1424 rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC); 1425 } 1426 1427 static struct mbuf * 1428 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1429 struct rt_addrinfo *info) 1430 { 1431 struct if_announcemsghdr *ifan; 1432 struct mbuf *m; 1433 1434 if (V_route_cb.any_count == 0) 1435 return NULL; 1436 bzero((caddr_t)info, sizeof(*info)); 1437 m = rtsock_msg_mbuf(type, info); 1438 if (m != NULL) { 1439 ifan = mtod(m, struct if_announcemsghdr *); 1440 ifan->ifan_index = ifp->if_index; 1441 strlcpy(ifan->ifan_name, ifp->if_xname, 1442 sizeof(ifan->ifan_name)); 1443 ifan->ifan_what = what; 1444 } 1445 return m; 1446 } 1447 1448 /* 1449 * This is called to generate routing socket messages indicating 1450 * IEEE80211 wireless events. 1451 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1452 */ 1453 void 1454 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1455 { 1456 struct mbuf *m; 1457 struct rt_addrinfo info; 1458 1459 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1460 if (m != NULL) { 1461 /* 1462 * Append the ieee80211 data. Try to stick it in the 1463 * mbuf containing the ifannounce msg; otherwise allocate 1464 * a new mbuf and append. 1465 * 1466 * NB: we assume m is a single mbuf. 1467 */ 1468 if (data_len > M_TRAILINGSPACE(m)) { 1469 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1470 if (n == NULL) { 1471 m_freem(m); 1472 return; 1473 } 1474 bcopy(data, mtod(n, void *), data_len); 1475 n->m_len = data_len; 1476 m->m_next = n; 1477 } else if (data_len > 0) { 1478 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1479 m->m_len += data_len; 1480 } 1481 if (m->m_flags & M_PKTHDR) 1482 m->m_pkthdr.len += data_len; 1483 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1484 rt_dispatch(m, AF_UNSPEC); 1485 } 1486 } 1487 1488 /* 1489 * This is called to generate routing socket messages indicating 1490 * network interface arrival and departure. 1491 */ 1492 void 1493 rt_ifannouncemsg(struct ifnet *ifp, int what) 1494 { 1495 struct mbuf *m; 1496 struct rt_addrinfo info; 1497 1498 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1499 if (m != NULL) 1500 rt_dispatch(m, AF_UNSPEC); 1501 } 1502 1503 static void 1504 rt_dispatch(struct mbuf *m, sa_family_t saf) 1505 { 1506 struct m_tag *tag; 1507 1508 /* 1509 * Preserve the family from the sockaddr, if any, in an m_tag for 1510 * use when injecting the mbuf into the routing socket buffer from 1511 * the netisr. 1512 */ 1513 if (saf != AF_UNSPEC) { 1514 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short), 1515 M_NOWAIT); 1516 if (tag == NULL) { 1517 m_freem(m); 1518 return; 1519 } 1520 *(unsigned short *)(tag + 1) = saf; 1521 m_tag_prepend(m, tag); 1522 } 1523 #ifdef VIMAGE 1524 if (V_loif) 1525 m->m_pkthdr.rcvif = V_loif; 1526 else { 1527 m_freem(m); 1528 return; 1529 } 1530 #endif 1531 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */ 1532 } 1533 1534 /* 1535 * This is used in dumping the kernel table via sysctl(). 1536 */ 1537 static int 1538 sysctl_dumpentry(struct radix_node *rn, void *vw) 1539 { 1540 struct walkarg *w = vw; 1541 struct rtentry *rt = (struct rtentry *)rn; 1542 int error = 0, size; 1543 struct rt_addrinfo info; 1544 struct sockaddr_storage ss; 1545 1546 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1547 return 0; 1548 if ((rt->rt_flags & RTF_HOST) == 0 1549 ? jailed_without_vnet(w->w_req->td->td_ucred) 1550 : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0) 1551 return (0); 1552 bzero((caddr_t)&info, sizeof(info)); 1553 info.rti_info[RTAX_DST] = rt_key(rt); 1554 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1555 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask(rt_key(rt), 1556 rt_mask(rt), &ss); 1557 info.rti_info[RTAX_GENMASK] = 0; 1558 if (rt->rt_ifp) { 1559 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr; 1560 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1561 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1562 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr; 1563 } 1564 if ((error = rtsock_msg_buffer(RTM_GET, &info, w, &size)) != 0) 1565 return (error); 1566 if (w->w_req && w->w_tmem) { 1567 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 1568 1569 if (rt->rt_flags & RTF_GWFLAG_COMPAT) 1570 rtm->rtm_flags = RTF_GATEWAY | 1571 (rt->rt_flags & ~RTF_GWFLAG_COMPAT); 1572 else 1573 rtm->rtm_flags = rt->rt_flags; 1574 rt_getmetrics(rt, &rtm->rtm_rmx); 1575 rtm->rtm_index = rt->rt_ifp->if_index; 1576 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1577 rtm->rtm_addrs = info.rti_addrs; 1578 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 1579 return (error); 1580 } 1581 return (error); 1582 } 1583 1584 static int 1585 sysctl_iflist_ifml(struct ifnet *ifp, const struct if_data *src_ifd, 1586 struct rt_addrinfo *info, struct walkarg *w, int len) 1587 { 1588 struct if_msghdrl *ifm; 1589 struct if_data *ifd; 1590 1591 ifm = (struct if_msghdrl *)w->w_tmem; 1592 1593 #ifdef COMPAT_FREEBSD32 1594 if (w->w_req->flags & SCTL_MASK32) { 1595 struct if_msghdrl32 *ifm32; 1596 1597 ifm32 = (struct if_msghdrl32 *)ifm; 1598 ifm32->ifm_addrs = info->rti_addrs; 1599 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1600 ifm32->ifm_index = ifp->if_index; 1601 ifm32->_ifm_spare1 = 0; 1602 ifm32->ifm_len = sizeof(*ifm32); 1603 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data); 1604 ifd = &ifm32->ifm_data; 1605 } else 1606 #endif 1607 { 1608 ifm->ifm_addrs = info->rti_addrs; 1609 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1610 ifm->ifm_index = ifp->if_index; 1611 ifm->_ifm_spare1 = 0; 1612 ifm->ifm_len = sizeof(*ifm); 1613 ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data); 1614 ifd = &ifm->ifm_data; 1615 } 1616 1617 memcpy(ifd, src_ifd, sizeof(*ifd)); 1618 1619 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len)); 1620 } 1621 1622 static int 1623 sysctl_iflist_ifm(struct ifnet *ifp, const struct if_data *src_ifd, 1624 struct rt_addrinfo *info, struct walkarg *w, int len) 1625 { 1626 struct if_msghdr *ifm; 1627 struct if_data *ifd; 1628 1629 ifm = (struct if_msghdr *)w->w_tmem; 1630 1631 #ifdef COMPAT_FREEBSD32 1632 if (w->w_req->flags & SCTL_MASK32) { 1633 struct if_msghdr32 *ifm32; 1634 1635 ifm32 = (struct if_msghdr32 *)ifm; 1636 ifm32->ifm_addrs = info->rti_addrs; 1637 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1638 ifm32->ifm_index = ifp->if_index; 1639 ifd = &ifm32->ifm_data; 1640 } else 1641 #endif 1642 { 1643 ifm->ifm_addrs = info->rti_addrs; 1644 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1645 ifm->ifm_index = ifp->if_index; 1646 ifd = &ifm->ifm_data; 1647 } 1648 1649 memcpy(ifd, src_ifd, sizeof(*ifd)); 1650 1651 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len)); 1652 } 1653 1654 static int 1655 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info, 1656 struct walkarg *w, int len) 1657 { 1658 struct ifa_msghdrl *ifam; 1659 struct if_data *ifd; 1660 1661 ifam = (struct ifa_msghdrl *)w->w_tmem; 1662 1663 #ifdef COMPAT_FREEBSD32 1664 if (w->w_req->flags & SCTL_MASK32) { 1665 struct ifa_msghdrl32 *ifam32; 1666 1667 ifam32 = (struct ifa_msghdrl32 *)ifam; 1668 ifam32->ifam_addrs = info->rti_addrs; 1669 ifam32->ifam_flags = ifa->ifa_flags; 1670 ifam32->ifam_index = ifa->ifa_ifp->if_index; 1671 ifam32->_ifam_spare1 = 0; 1672 ifam32->ifam_len = sizeof(*ifam32); 1673 ifam32->ifam_data_off = 1674 offsetof(struct ifa_msghdrl32, ifam_data); 1675 ifam32->ifam_metric = ifa->ifa_ifp->if_metric; 1676 ifd = &ifam32->ifam_data; 1677 } else 1678 #endif 1679 { 1680 ifam->ifam_addrs = info->rti_addrs; 1681 ifam->ifam_flags = ifa->ifa_flags; 1682 ifam->ifam_index = ifa->ifa_ifp->if_index; 1683 ifam->_ifam_spare1 = 0; 1684 ifam->ifam_len = sizeof(*ifam); 1685 ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data); 1686 ifam->ifam_metric = ifa->ifa_ifp->if_metric; 1687 ifd = &ifam->ifam_data; 1688 } 1689 1690 bzero(ifd, sizeof(*ifd)); 1691 ifd->ifi_datalen = sizeof(struct if_data); 1692 ifd->ifi_ipackets = counter_u64_fetch(ifa->ifa_ipackets); 1693 ifd->ifi_opackets = counter_u64_fetch(ifa->ifa_opackets); 1694 ifd->ifi_ibytes = counter_u64_fetch(ifa->ifa_ibytes); 1695 ifd->ifi_obytes = counter_u64_fetch(ifa->ifa_obytes); 1696 1697 /* Fixup if_data carp(4) vhid. */ 1698 if (carp_get_vhid_p != NULL) 1699 ifd->ifi_vhid = (*carp_get_vhid_p)(ifa); 1700 1701 return (SYSCTL_OUT(w->w_req, w->w_tmem, len)); 1702 } 1703 1704 static int 1705 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info, 1706 struct walkarg *w, int len) 1707 { 1708 struct ifa_msghdr *ifam; 1709 1710 ifam = (struct ifa_msghdr *)w->w_tmem; 1711 ifam->ifam_addrs = info->rti_addrs; 1712 ifam->ifam_flags = ifa->ifa_flags; 1713 ifam->ifam_index = ifa->ifa_ifp->if_index; 1714 ifam->ifam_metric = ifa->ifa_ifp->if_metric; 1715 1716 return (SYSCTL_OUT(w->w_req, w->w_tmem, len)); 1717 } 1718 1719 static int 1720 sysctl_iflist(int af, struct walkarg *w) 1721 { 1722 struct ifnet *ifp; 1723 struct ifaddr *ifa; 1724 struct if_data ifd; 1725 struct rt_addrinfo info; 1726 int len, error = 0; 1727 struct sockaddr_storage ss; 1728 1729 bzero((caddr_t)&info, sizeof(info)); 1730 bzero(&ifd, sizeof(ifd)); 1731 IFNET_RLOCK_NOSLEEP(); 1732 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1733 if (w->w_arg && w->w_arg != ifp->if_index) 1734 continue; 1735 if_data_copy(ifp, &ifd); 1736 IF_ADDR_RLOCK(ifp); 1737 ifa = ifp->if_addr; 1738 info.rti_info[RTAX_IFP] = ifa->ifa_addr; 1739 error = rtsock_msg_buffer(RTM_IFINFO, &info, w, &len); 1740 if (error != 0) 1741 goto done; 1742 info.rti_info[RTAX_IFP] = NULL; 1743 if (w->w_req && w->w_tmem) { 1744 if (w->w_op == NET_RT_IFLISTL) 1745 error = sysctl_iflist_ifml(ifp, &ifd, &info, w, 1746 len); 1747 else 1748 error = sysctl_iflist_ifm(ifp, &ifd, &info, w, 1749 len); 1750 if (error) 1751 goto done; 1752 } 1753 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1754 if (af && af != ifa->ifa_addr->sa_family) 1755 continue; 1756 if (prison_if(w->w_req->td->td_ucred, 1757 ifa->ifa_addr) != 0) 1758 continue; 1759 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1760 info.rti_info[RTAX_NETMASK] = rtsock_fix_netmask( 1761 ifa->ifa_addr, ifa->ifa_netmask, &ss); 1762 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1763 error = rtsock_msg_buffer(RTM_NEWADDR, &info, w, &len); 1764 if (error != 0) 1765 goto done; 1766 if (w->w_req && w->w_tmem) { 1767 if (w->w_op == NET_RT_IFLISTL) 1768 error = sysctl_iflist_ifaml(ifa, &info, 1769 w, len); 1770 else 1771 error = sysctl_iflist_ifam(ifa, &info, 1772 w, len); 1773 if (error) 1774 goto done; 1775 } 1776 } 1777 IF_ADDR_RUNLOCK(ifp); 1778 info.rti_info[RTAX_IFA] = NULL; 1779 info.rti_info[RTAX_NETMASK] = NULL; 1780 info.rti_info[RTAX_BRD] = NULL; 1781 } 1782 done: 1783 if (ifp != NULL) 1784 IF_ADDR_RUNLOCK(ifp); 1785 IFNET_RUNLOCK_NOSLEEP(); 1786 return (error); 1787 } 1788 1789 static int 1790 sysctl_ifmalist(int af, struct walkarg *w) 1791 { 1792 struct rt_addrinfo info; 1793 struct ifaddr *ifa; 1794 struct ifmultiaddr *ifma; 1795 struct ifnet *ifp; 1796 int error, len; 1797 1798 error = 0; 1799 bzero((caddr_t)&info, sizeof(info)); 1800 1801 IFNET_RLOCK_NOSLEEP(); 1802 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1803 if (w->w_arg && w->w_arg != ifp->if_index) 1804 continue; 1805 ifa = ifp->if_addr; 1806 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL; 1807 IF_ADDR_RLOCK(ifp); 1808 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1809 if (af && af != ifma->ifma_addr->sa_family) 1810 continue; 1811 if (prison_if(w->w_req->td->td_ucred, 1812 ifma->ifma_addr) != 0) 1813 continue; 1814 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1815 info.rti_info[RTAX_GATEWAY] = 1816 (ifma->ifma_addr->sa_family != AF_LINK) ? 1817 ifma->ifma_lladdr : NULL; 1818 error = rtsock_msg_buffer(RTM_NEWMADDR, &info, w, &len); 1819 if (error != 0) 1820 break; 1821 if (w->w_req && w->w_tmem) { 1822 struct ifma_msghdr *ifmam; 1823 1824 ifmam = (struct ifma_msghdr *)w->w_tmem; 1825 ifmam->ifmam_index = ifma->ifma_ifp->if_index; 1826 ifmam->ifmam_flags = 0; 1827 ifmam->ifmam_addrs = info.rti_addrs; 1828 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1829 if (error != 0) 1830 break; 1831 } 1832 } 1833 IF_ADDR_RUNLOCK(ifp); 1834 if (error != 0) 1835 break; 1836 } 1837 IFNET_RUNLOCK_NOSLEEP(); 1838 return (error); 1839 } 1840 1841 static int 1842 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1843 { 1844 int *name = (int *)arg1; 1845 u_int namelen = arg2; 1846 struct rib_head *rnh = NULL; /* silence compiler. */ 1847 int i, lim, error = EINVAL; 1848 int fib = 0; 1849 u_char af; 1850 struct walkarg w; 1851 1852 name ++; 1853 namelen--; 1854 if (req->newptr) 1855 return (EPERM); 1856 if (name[1] == NET_RT_DUMP) { 1857 if (namelen == 3) 1858 fib = req->td->td_proc->p_fibnum; 1859 else if (namelen == 4) 1860 fib = (name[3] == RT_ALL_FIBS) ? 1861 req->td->td_proc->p_fibnum : name[3]; 1862 else 1863 return ((namelen < 3) ? EISDIR : ENOTDIR); 1864 if (fib < 0 || fib >= rt_numfibs) 1865 return (EINVAL); 1866 } else if (namelen != 3) 1867 return ((namelen < 3) ? EISDIR : ENOTDIR); 1868 af = name[0]; 1869 if (af > AF_MAX) 1870 return (EINVAL); 1871 bzero(&w, sizeof(w)); 1872 w.w_op = name[1]; 1873 w.w_arg = name[2]; 1874 w.w_req = req; 1875 1876 error = sysctl_wire_old_buffer(req, 0); 1877 if (error) 1878 return (error); 1879 1880 /* 1881 * Allocate reply buffer in advance. 1882 * All rtsock messages has maximum length of u_short. 1883 */ 1884 w.w_tmemsize = 65536; 1885 w.w_tmem = malloc(w.w_tmemsize, M_TEMP, M_WAITOK); 1886 1887 switch (w.w_op) { 1888 1889 case NET_RT_DUMP: 1890 case NET_RT_FLAGS: 1891 if (af == 0) { /* dump all tables */ 1892 i = 1; 1893 lim = AF_MAX; 1894 } else /* dump only one table */ 1895 i = lim = af; 1896 1897 /* 1898 * take care of llinfo entries, the caller must 1899 * specify an AF 1900 */ 1901 if (w.w_op == NET_RT_FLAGS && 1902 (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) { 1903 if (af != 0) 1904 error = lltable_sysctl_dumparp(af, w.w_req); 1905 else 1906 error = EINVAL; 1907 break; 1908 } 1909 /* 1910 * take care of routing entries 1911 */ 1912 for (error = 0; error == 0 && i <= lim; i++) { 1913 rnh = rt_tables_get_rnh(fib, i); 1914 if (rnh != NULL) { 1915 RIB_RLOCK(rnh); 1916 error = rnh->rnh_walktree(&rnh->head, 1917 sysctl_dumpentry, &w); 1918 RIB_RUNLOCK(rnh); 1919 } else if (af != 0) 1920 error = EAFNOSUPPORT; 1921 } 1922 break; 1923 1924 case NET_RT_IFLIST: 1925 case NET_RT_IFLISTL: 1926 error = sysctl_iflist(af, &w); 1927 break; 1928 1929 case NET_RT_IFMALIST: 1930 error = sysctl_ifmalist(af, &w); 1931 break; 1932 } 1933 1934 free(w.w_tmem, M_TEMP); 1935 return (error); 1936 } 1937 1938 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1939 1940 /* 1941 * Definitions of protocols supported in the ROUTE domain. 1942 */ 1943 1944 static struct domain routedomain; /* or at least forward */ 1945 1946 static struct protosw routesw[] = { 1947 { 1948 .pr_type = SOCK_RAW, 1949 .pr_domain = &routedomain, 1950 .pr_flags = PR_ATOMIC|PR_ADDR, 1951 .pr_output = route_output, 1952 .pr_ctlinput = raw_ctlinput, 1953 .pr_init = raw_init, 1954 .pr_usrreqs = &route_usrreqs 1955 } 1956 }; 1957 1958 static struct domain routedomain = { 1959 .dom_family = PF_ROUTE, 1960 .dom_name = "route", 1961 .dom_protosw = routesw, 1962 .dom_protoswNPROTOSW = &routesw[nitems(routesw)] 1963 }; 1964 1965 VNET_DOMAIN_SET(route);
Cache object: e07a6727a6629a69be15c70aad77d338
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