rtsock.c revision 264076
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: stable/10/sys/net/rtsock.c 264076 2014-04-03 14:58:52Z glebius $ 31 */ 32#include "opt_compat.h" 33#include "opt_sctp.h" 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#define _IN_NET_RTSOCK_C 56#include <net/if.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/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#if defined(INET) || defined(INET6) 74#ifdef SCTP 75extern void sctp_addr_change(struct ifaddr *ifa, int cmd); 76#endif /* SCTP */ 77#endif 78 79#ifdef COMPAT_FREEBSD32 80#include <sys/mount.h> 81#include <compat/freebsd32/freebsd32.h> 82 83struct if_data32 { 84 uint8_t ifi_type; 85 uint8_t ifi_physical; 86 uint8_t ifi_addrlen; 87 uint8_t ifi_hdrlen; 88 uint8_t ifi_link_state; 89 uint8_t ifi_vhid; 90 uint8_t ifi_baudrate_pf; 91 uint8_t ifi_datalen; 92 uint32_t ifi_mtu; 93 uint32_t ifi_metric; 94 uint32_t ifi_baudrate; 95 uint32_t ifi_ipackets; 96 uint32_t ifi_ierrors; 97 uint32_t ifi_opackets; 98 uint32_t ifi_oerrors; 99 uint32_t ifi_collisions; 100 uint32_t ifi_ibytes; 101 uint32_t ifi_obytes; 102 uint32_t ifi_imcasts; 103 uint32_t ifi_omcasts; 104 uint32_t ifi_iqdrops; 105 uint32_t ifi_noproto; 106 uint32_t ifi_hwassist; 107 int32_t ifi_epoch; 108 struct timeval32 ifi_lastchange; 109 uint32_t ifi_oqdrops; 110}; 111 112struct if_msghdr32 { 113 uint16_t ifm_msglen; 114 uint8_t ifm_version; 115 uint8_t ifm_type; 116 int32_t ifm_addrs; 117 int32_t ifm_flags; 118 uint16_t ifm_index; 119 struct if_data32 ifm_data; 120}; 121 122struct if_msghdrl32 { 123 uint16_t ifm_msglen; 124 uint8_t ifm_version; 125 uint8_t ifm_type; 126 int32_t ifm_addrs; 127 int32_t ifm_flags; 128 uint16_t ifm_index; 129 uint16_t _ifm_spare1; 130 uint16_t ifm_len; 131 uint16_t ifm_data_off; 132 struct if_data32 ifm_data; 133}; 134 135struct ifa_msghdrl32 { 136 uint16_t ifam_msglen; 137 uint8_t ifam_version; 138 uint8_t ifam_type; 139 int32_t ifam_addrs; 140 int32_t ifam_flags; 141 uint16_t ifam_index; 142 uint16_t _ifam_spare1; 143 uint16_t ifam_len; 144 uint16_t ifam_data_off; 145 int32_t ifam_metric; 146 struct if_data32 ifam_data; 147}; 148#endif /* COMPAT_FREEBSD32 */ 149 150MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 151 152/* NB: these are not modified */ 153static struct sockaddr route_src = { 2, PF_ROUTE, }; 154static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 155 156/* These are external hooks for CARP. */ 157int (*carp_get_vhid_p)(struct ifaddr *); 158 159/* 160 * Used by rtsock/raw_input callback code to decide whether to filter the update 161 * notification to a socket bound to a particular FIB. 162 */ 163#define RTS_FILTER_FIB M_PROTO8 164#define RTS_ALLFIBS -1 165 166static struct { 167 int ip_count; /* attached w/ AF_INET */ 168 int ip6_count; /* attached w/ AF_INET6 */ 169 int ipx_count; /* attached w/ AF_IPX */ 170 int any_count; /* total attached */ 171} route_cb; 172 173struct mtx rtsock_mtx; 174MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF); 175 176#define RTSOCK_LOCK() mtx_lock(&rtsock_mtx) 177#define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx) 178#define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED) 179 180static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, ""); 181 182struct walkarg { 183 int w_tmemsize; 184 int w_op, w_arg; 185 caddr_t w_tmem; 186 struct sysctl_req *w_req; 187}; 188 189static void rts_input(struct mbuf *m); 190static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo); 191static int rt_msg2(int type, struct rt_addrinfo *rtinfo, 192 caddr_t cp, struct walkarg *w); 193static int rt_xaddrs(caddr_t cp, caddr_t cplim, 194 struct rt_addrinfo *rtinfo); 195static int sysctl_dumpentry(struct radix_node *rn, void *vw); 196static int sysctl_iflist(int af, struct walkarg *w); 197static int sysctl_ifmalist(int af, struct walkarg *w); 198static int route_output(struct mbuf *m, struct socket *so); 199static void rt_setmetrics(const struct rt_msghdr *rtm, struct rtentry *rt); 200static void rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out); 201static void rt_dispatch(struct mbuf *, sa_family_t); 202 203static struct netisr_handler rtsock_nh = { 204 .nh_name = "rtsock", 205 .nh_handler = rts_input, 206 .nh_proto = NETISR_ROUTE, 207 .nh_policy = NETISR_POLICY_SOURCE, 208}; 209 210static int 211sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS) 212{ 213 int error, qlimit; 214 215 netisr_getqlimit(&rtsock_nh, &qlimit); 216 error = sysctl_handle_int(oidp, &qlimit, 0, req); 217 if (error || !req->newptr) 218 return (error); 219 if (qlimit < 1) 220 return (EINVAL); 221 return (netisr_setqlimit(&rtsock_nh, qlimit)); 222} 223SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW, 224 0, 0, sysctl_route_netisr_maxqlen, "I", 225 "maximum routing socket dispatch queue length"); 226 227static void 228rts_init(void) 229{ 230 int tmp; 231 232 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp)) 233 rtsock_nh.nh_qlimit = tmp; 234 netisr_register(&rtsock_nh); 235} 236SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0); 237 238static int 239raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src, 240 struct rawcb *rp) 241{ 242 int fibnum; 243 244 KASSERT(m != NULL, ("%s: m is NULL", __func__)); 245 KASSERT(proto != NULL, ("%s: proto is NULL", __func__)); 246 KASSERT(rp != NULL, ("%s: rp is NULL", __func__)); 247 248 /* No filtering requested. */ 249 if ((m->m_flags & RTS_FILTER_FIB) == 0) 250 return (0); 251 252 /* Check if it is a rts and the fib matches the one of the socket. */ 253 fibnum = M_GETFIB(m); 254 if (proto->sp_family != PF_ROUTE || 255 rp->rcb_socket == NULL || 256 rp->rcb_socket->so_fibnum == fibnum) 257 return (0); 258 259 /* Filtering requested and no match, the socket shall be skipped. */ 260 return (1); 261} 262 263static void 264rts_input(struct mbuf *m) 265{ 266 struct sockproto route_proto; 267 unsigned short *family; 268 struct m_tag *tag; 269 270 route_proto.sp_family = PF_ROUTE; 271 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL); 272 if (tag != NULL) { 273 family = (unsigned short *)(tag + 1); 274 route_proto.sp_protocol = *family; 275 m_tag_delete(m, tag); 276 } else 277 route_proto.sp_protocol = 0; 278 279 raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb); 280} 281 282/* 283 * It really doesn't make any sense at all for this code to share much 284 * with raw_usrreq.c, since its functionality is so restricted. XXX 285 */ 286static void 287rts_abort(struct socket *so) 288{ 289 290 raw_usrreqs.pru_abort(so); 291} 292 293static void 294rts_close(struct socket *so) 295{ 296 297 raw_usrreqs.pru_close(so); 298} 299 300/* pru_accept is EOPNOTSUPP */ 301 302static int 303rts_attach(struct socket *so, int proto, struct thread *td) 304{ 305 struct rawcb *rp; 306 int error; 307 308 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL")); 309 310 /* XXX */ 311 rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 312 if (rp == NULL) 313 return ENOBUFS; 314 315 so->so_pcb = (caddr_t)rp; 316 so->so_fibnum = td->td_proc->p_fibnum; 317 error = raw_attach(so, proto); 318 rp = sotorawcb(so); 319 if (error) { 320 so->so_pcb = NULL; 321 free(rp, M_PCB); 322 return error; 323 } 324 RTSOCK_LOCK(); 325 switch(rp->rcb_proto.sp_protocol) { 326 case AF_INET: 327 route_cb.ip_count++; 328 break; 329 case AF_INET6: 330 route_cb.ip6_count++; 331 break; 332 case AF_IPX: 333 route_cb.ipx_count++; 334 break; 335 } 336 route_cb.any_count++; 337 RTSOCK_UNLOCK(); 338 soisconnected(so); 339 so->so_options |= SO_USELOOPBACK; 340 return 0; 341} 342 343static int 344rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 345{ 346 347 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */ 348} 349 350static int 351rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 352{ 353 354 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */ 355} 356 357/* pru_connect2 is EOPNOTSUPP */ 358/* pru_control is EOPNOTSUPP */ 359 360static void 361rts_detach(struct socket *so) 362{ 363 struct rawcb *rp = sotorawcb(so); 364 365 KASSERT(rp != NULL, ("rts_detach: rp == NULL")); 366 367 RTSOCK_LOCK(); 368 switch(rp->rcb_proto.sp_protocol) { 369 case AF_INET: 370 route_cb.ip_count--; 371 break; 372 case AF_INET6: 373 route_cb.ip6_count--; 374 break; 375 case AF_IPX: 376 route_cb.ipx_count--; 377 break; 378 } 379 route_cb.any_count--; 380 RTSOCK_UNLOCK(); 381 raw_usrreqs.pru_detach(so); 382} 383 384static int 385rts_disconnect(struct socket *so) 386{ 387 388 return (raw_usrreqs.pru_disconnect(so)); 389} 390 391/* pru_listen is EOPNOTSUPP */ 392 393static int 394rts_peeraddr(struct socket *so, struct sockaddr **nam) 395{ 396 397 return (raw_usrreqs.pru_peeraddr(so, nam)); 398} 399 400/* pru_rcvd is EOPNOTSUPP */ 401/* pru_rcvoob is EOPNOTSUPP */ 402 403static int 404rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 405 struct mbuf *control, struct thread *td) 406{ 407 408 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 409} 410 411/* pru_sense is null */ 412 413static int 414rts_shutdown(struct socket *so) 415{ 416 417 return (raw_usrreqs.pru_shutdown(so)); 418} 419 420static int 421rts_sockaddr(struct socket *so, struct sockaddr **nam) 422{ 423 424 return (raw_usrreqs.pru_sockaddr(so, nam)); 425} 426 427static struct pr_usrreqs route_usrreqs = { 428 .pru_abort = rts_abort, 429 .pru_attach = rts_attach, 430 .pru_bind = rts_bind, 431 .pru_connect = rts_connect, 432 .pru_detach = rts_detach, 433 .pru_disconnect = rts_disconnect, 434 .pru_peeraddr = rts_peeraddr, 435 .pru_send = rts_send, 436 .pru_shutdown = rts_shutdown, 437 .pru_sockaddr = rts_sockaddr, 438 .pru_close = rts_close, 439}; 440 441#ifndef _SOCKADDR_UNION_DEFINED 442#define _SOCKADDR_UNION_DEFINED 443/* 444 * The union of all possible address formats we handle. 445 */ 446union sockaddr_union { 447 struct sockaddr sa; 448 struct sockaddr_in sin; 449 struct sockaddr_in6 sin6; 450}; 451#endif /* _SOCKADDR_UNION_DEFINED */ 452 453static int 454rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp, 455 struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred) 456{ 457 458 /* First, see if the returned address is part of the jail. */ 459 if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) { 460 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 461 return (0); 462 } 463 464 switch (info->rti_info[RTAX_DST]->sa_family) { 465#ifdef INET 466 case AF_INET: 467 { 468 struct in_addr ia; 469 struct ifaddr *ifa; 470 int found; 471 472 found = 0; 473 /* 474 * Try to find an address on the given outgoing interface 475 * that belongs to the jail. 476 */ 477 IF_ADDR_RLOCK(ifp); 478 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 479 struct sockaddr *sa; 480 sa = ifa->ifa_addr; 481 if (sa->sa_family != AF_INET) 482 continue; 483 ia = ((struct sockaddr_in *)sa)->sin_addr; 484 if (prison_check_ip4(cred, &ia) == 0) { 485 found = 1; 486 break; 487 } 488 } 489 IF_ADDR_RUNLOCK(ifp); 490 if (!found) { 491 /* 492 * As a last resort return the 'default' jail address. 493 */ 494 ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)-> 495 sin_addr; 496 if (prison_get_ip4(cred, &ia) != 0) 497 return (ESRCH); 498 } 499 bzero(&saun->sin, sizeof(struct sockaddr_in)); 500 saun->sin.sin_len = sizeof(struct sockaddr_in); 501 saun->sin.sin_family = AF_INET; 502 saun->sin.sin_addr.s_addr = ia.s_addr; 503 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin; 504 break; 505 } 506#endif 507#ifdef INET6 508 case AF_INET6: 509 { 510 struct in6_addr ia6; 511 struct ifaddr *ifa; 512 int found; 513 514 found = 0; 515 /* 516 * Try to find an address on the given outgoing interface 517 * that belongs to the jail. 518 */ 519 IF_ADDR_RLOCK(ifp); 520 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 521 struct sockaddr *sa; 522 sa = ifa->ifa_addr; 523 if (sa->sa_family != AF_INET6) 524 continue; 525 bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr, 526 &ia6, sizeof(struct in6_addr)); 527 if (prison_check_ip6(cred, &ia6) == 0) { 528 found = 1; 529 break; 530 } 531 } 532 IF_ADDR_RUNLOCK(ifp); 533 if (!found) { 534 /* 535 * As a last resort return the 'default' jail address. 536 */ 537 ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)-> 538 sin6_addr; 539 if (prison_get_ip6(cred, &ia6) != 0) 540 return (ESRCH); 541 } 542 bzero(&saun->sin6, sizeof(struct sockaddr_in6)); 543 saun->sin6.sin6_len = sizeof(struct sockaddr_in6); 544 saun->sin6.sin6_family = AF_INET6; 545 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr)); 546 if (sa6_recoverscope(&saun->sin6) != 0) 547 return (ESRCH); 548 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6; 549 break; 550 } 551#endif 552 default: 553 return (ESRCH); 554 } 555 return (0); 556} 557 558/*ARGSUSED*/ 559static int 560route_output(struct mbuf *m, struct socket *so) 561{ 562#define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0) 563 struct rt_msghdr *rtm = NULL; 564 struct rtentry *rt = NULL; 565 struct radix_node_head *rnh; 566 struct rt_addrinfo info; 567#ifdef INET6 568 struct sockaddr_storage ss; 569 struct sockaddr_in6 *sin6; 570 int i, rti_need_deembed = 0; 571#endif 572 int len, error = 0; 573 struct ifnet *ifp = NULL; 574 union sockaddr_union saun; 575 sa_family_t saf = AF_UNSPEC; 576 577#define senderr(e) { error = e; goto flush;} 578 if (m == NULL || ((m->m_len < sizeof(long)) && 579 (m = m_pullup(m, sizeof(long))) == NULL)) 580 return (ENOBUFS); 581 if ((m->m_flags & M_PKTHDR) == 0) 582 panic("route_output"); 583 len = m->m_pkthdr.len; 584 if (len < sizeof(*rtm) || 585 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 586 info.rti_info[RTAX_DST] = NULL; 587 senderr(EINVAL); 588 } 589 R_Malloc(rtm, struct rt_msghdr *, len); 590 if (rtm == NULL) { 591 info.rti_info[RTAX_DST] = NULL; 592 senderr(ENOBUFS); 593 } 594 m_copydata(m, 0, len, (caddr_t)rtm); 595 if (rtm->rtm_version != RTM_VERSION) { 596 info.rti_info[RTAX_DST] = NULL; 597 senderr(EPROTONOSUPPORT); 598 } 599 rtm->rtm_pid = curproc->p_pid; 600 bzero(&info, sizeof(info)); 601 info.rti_addrs = rtm->rtm_addrs; 602 /* 603 * rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6 604 * link-local address because rtrequest requires addresses with 605 * embedded scope id. 606 */ 607 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { 608 info.rti_info[RTAX_DST] = NULL; 609 senderr(EINVAL); 610 } 611 info.rti_flags = rtm->rtm_flags; 612 if (info.rti_info[RTAX_DST] == NULL || 613 info.rti_info[RTAX_DST]->sa_family >= AF_MAX || 614 (info.rti_info[RTAX_GATEWAY] != NULL && 615 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) 616 senderr(EINVAL); 617 saf = info.rti_info[RTAX_DST]->sa_family; 618 /* 619 * Verify that the caller has the appropriate privilege; RTM_GET 620 * is the only operation the non-superuser is allowed. 621 */ 622 if (rtm->rtm_type != RTM_GET) { 623 error = priv_check(curthread, PRIV_NET_ROUTE); 624 if (error) 625 senderr(error); 626 } 627 628 /* 629 * The given gateway address may be an interface address. 630 * For example, issuing a "route change" command on a route 631 * entry that was created from a tunnel, and the gateway 632 * address given is the local end point. In this case the 633 * RTF_GATEWAY flag must be cleared or the destination will 634 * not be reachable even though there is no error message. 635 */ 636 if (info.rti_info[RTAX_GATEWAY] != NULL && 637 info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) { 638 struct route gw_ro; 639 640 bzero(&gw_ro, sizeof(gw_ro)); 641 gw_ro.ro_dst = *info.rti_info[RTAX_GATEWAY]; 642 rtalloc_ign_fib(&gw_ro, 0, so->so_fibnum); 643 /* 644 * A host route through the loopback interface is 645 * installed for each interface adddress. In pre 8.0 646 * releases the interface address of a PPP link type 647 * is not reachable locally. This behavior is fixed as 648 * part of the new L2/L3 redesign and rewrite work. The 649 * signature of this interface address route is the 650 * AF_LINK sa_family type of the rt_gateway, and the 651 * rt_ifp has the IFF_LOOPBACK flag set. 652 */ 653 if (gw_ro.ro_rt != NULL && 654 gw_ro.ro_rt->rt_gateway->sa_family == AF_LINK && 655 gw_ro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) { 656 info.rti_flags &= ~RTF_GATEWAY; 657 info.rti_flags |= RTF_GWFLAG_COMPAT; 658 } 659 if (gw_ro.ro_rt != NULL) 660 RTFREE(gw_ro.ro_rt); 661 } 662 663 switch (rtm->rtm_type) { 664 struct rtentry *saved_nrt; 665 666 case RTM_ADD: 667 if (info.rti_info[RTAX_GATEWAY] == NULL) 668 senderr(EINVAL); 669 saved_nrt = NULL; 670 671 /* support for new ARP code */ 672 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK && 673 (rtm->rtm_flags & RTF_LLDATA) != 0) { 674 error = lla_rt_output(rtm, &info); 675#ifdef INET6 676 if (error == 0) 677 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 678#endif 679 break; 680 } 681 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt, 682 so->so_fibnum); 683 if (error == 0 && saved_nrt) { 684#ifdef INET6 685 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 686#endif 687 RT_LOCK(saved_nrt); 688 rt_setmetrics(rtm, saved_nrt); 689 rtm->rtm_index = saved_nrt->rt_ifp->if_index; 690 RT_REMREF(saved_nrt); 691 RT_UNLOCK(saved_nrt); 692 } 693 break; 694 695 case RTM_DELETE: 696 saved_nrt = NULL; 697 /* support for new ARP code */ 698 if (info.rti_info[RTAX_GATEWAY] && 699 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 700 (rtm->rtm_flags & RTF_LLDATA) != 0) { 701 error = lla_rt_output(rtm, &info); 702#ifdef INET6 703 if (error == 0) 704 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 705#endif 706 break; 707 } 708 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt, 709 so->so_fibnum); 710 if (error == 0) { 711 RT_LOCK(saved_nrt); 712 rt = saved_nrt; 713 goto report; 714 } 715#ifdef INET6 716 /* rt_msg2() will not be used when RTM_DELETE fails. */ 717 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0; 718#endif 719 break; 720 721 case RTM_GET: 722 case RTM_CHANGE: 723 case RTM_LOCK: 724 rnh = rt_tables_get_rnh(so->so_fibnum, 725 info.rti_info[RTAX_DST]->sa_family); 726 if (rnh == NULL) 727 senderr(EAFNOSUPPORT); 728 RADIX_NODE_HEAD_RLOCK(rnh); 729 rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST], 730 info.rti_info[RTAX_NETMASK], rnh); 731 if (rt == NULL) { /* XXX looks bogus */ 732 RADIX_NODE_HEAD_RUNLOCK(rnh); 733 senderr(ESRCH); 734 } 735#ifdef RADIX_MPATH 736 /* 737 * for RTM_CHANGE/LOCK, if we got multipath routes, 738 * we require users to specify a matching RTAX_GATEWAY. 739 * 740 * for RTM_GET, gate is optional even with multipath. 741 * if gate == NULL the first match is returned. 742 * (no need to call rt_mpath_matchgate if gate == NULL) 743 */ 744 if (rn_mpath_capable(rnh) && 745 (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) { 746 rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]); 747 if (!rt) { 748 RADIX_NODE_HEAD_RUNLOCK(rnh); 749 senderr(ESRCH); 750 } 751 } 752#endif 753 /* 754 * If performing proxied L2 entry insertion, and 755 * the actual PPP host entry is found, perform 756 * another search to retrieve the prefix route of 757 * the local end point of the PPP link. 758 */ 759 if (rtm->rtm_flags & RTF_ANNOUNCE) { 760 struct sockaddr laddr; 761 762 if (rt->rt_ifp != NULL && 763 rt->rt_ifp->if_type == IFT_PROPVIRTUAL) { 764 struct ifaddr *ifa; 765 766 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1); 767 if (ifa != NULL) 768 rt_maskedcopy(ifa->ifa_addr, 769 &laddr, 770 ifa->ifa_netmask); 771 } else 772 rt_maskedcopy(rt->rt_ifa->ifa_addr, 773 &laddr, 774 rt->rt_ifa->ifa_netmask); 775 /* 776 * refactor rt and no lock operation necessary 777 */ 778 rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, rnh); 779 if (rt == NULL) { 780 RADIX_NODE_HEAD_RUNLOCK(rnh); 781 senderr(ESRCH); 782 } 783 } 784 RT_LOCK(rt); 785 RT_ADDREF(rt); 786 RADIX_NODE_HEAD_RUNLOCK(rnh); 787 788 /* 789 * Fix for PR: 82974 790 * 791 * RTM_CHANGE/LOCK need a perfect match, rn_lookup() 792 * returns a perfect match in case a netmask is 793 * specified. For host routes only a longest prefix 794 * match is returned so it is necessary to compare the 795 * existence of the netmask. If both have a netmask 796 * rnh_lookup() did a perfect match and if none of them 797 * have a netmask both are host routes which is also a 798 * perfect match. 799 */ 800 801 if (rtm->rtm_type != RTM_GET && 802 (!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) { 803 RT_UNLOCK(rt); 804 senderr(ESRCH); 805 } 806 807 switch(rtm->rtm_type) { 808 809 case RTM_GET: 810 report: 811 RT_LOCK_ASSERT(rt); 812 if ((rt->rt_flags & RTF_HOST) == 0 813 ? jailed_without_vnet(curthread->td_ucred) 814 : prison_if(curthread->td_ucred, 815 rt_key(rt)) != 0) { 816 RT_UNLOCK(rt); 817 senderr(ESRCH); 818 } 819 info.rti_info[RTAX_DST] = rt_key(rt); 820 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 821 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 822 info.rti_info[RTAX_GENMASK] = 0; 823 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 824 ifp = rt->rt_ifp; 825 if (ifp) { 826 info.rti_info[RTAX_IFP] = 827 ifp->if_addr->ifa_addr; 828 error = rtm_get_jailed(&info, ifp, rt, 829 &saun, curthread->td_ucred); 830 if (error != 0) { 831 RT_UNLOCK(rt); 832 senderr(error); 833 } 834 if (ifp->if_flags & IFF_POINTOPOINT) 835 info.rti_info[RTAX_BRD] = 836 rt->rt_ifa->ifa_dstaddr; 837 rtm->rtm_index = ifp->if_index; 838 } else { 839 info.rti_info[RTAX_IFP] = NULL; 840 info.rti_info[RTAX_IFA] = NULL; 841 } 842 } else if ((ifp = rt->rt_ifp) != NULL) { 843 rtm->rtm_index = ifp->if_index; 844 } 845 len = rt_msg2(rtm->rtm_type, &info, NULL, NULL); 846 if (len > rtm->rtm_msglen) { 847 struct rt_msghdr *new_rtm; 848 R_Malloc(new_rtm, struct rt_msghdr *, len); 849 if (new_rtm == NULL) { 850 RT_UNLOCK(rt); 851 senderr(ENOBUFS); 852 } 853 bcopy(rtm, new_rtm, rtm->rtm_msglen); 854 Free(rtm); rtm = new_rtm; 855 } 856 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL); 857 if (rt->rt_flags & RTF_GWFLAG_COMPAT) 858 rtm->rtm_flags = RTF_GATEWAY | 859 (rt->rt_flags & ~RTF_GWFLAG_COMPAT); 860 else 861 rtm->rtm_flags = rt->rt_flags; 862 rt_getmetrics(rt, &rtm->rtm_rmx); 863 rtm->rtm_addrs = info.rti_addrs; 864 break; 865 866 case RTM_CHANGE: 867 /* 868 * New gateway could require new ifaddr, ifp; 869 * flags may also be different; ifp may be specified 870 * by ll sockaddr when protocol address is ambiguous 871 */ 872 if (((rt->rt_flags & RTF_GATEWAY) && 873 info.rti_info[RTAX_GATEWAY] != NULL) || 874 info.rti_info[RTAX_IFP] != NULL || 875 (info.rti_info[RTAX_IFA] != NULL && 876 !sa_equal(info.rti_info[RTAX_IFA], 877 rt->rt_ifa->ifa_addr))) { 878 RT_UNLOCK(rt); 879 RADIX_NODE_HEAD_LOCK(rnh); 880 error = rt_getifa_fib(&info, rt->rt_fibnum); 881 /* 882 * XXXRW: Really we should release this 883 * reference later, but this maintains 884 * historical behavior. 885 */ 886 if (info.rti_ifa != NULL) 887 ifa_free(info.rti_ifa); 888 RADIX_NODE_HEAD_UNLOCK(rnh); 889 if (error != 0) 890 senderr(error); 891 RT_LOCK(rt); 892 } 893 if (info.rti_ifa != NULL && 894 info.rti_ifa != rt->rt_ifa && 895 rt->rt_ifa != NULL && 896 rt->rt_ifa->ifa_rtrequest != NULL) { 897 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, 898 &info); 899 ifa_free(rt->rt_ifa); 900 } 901 if (info.rti_info[RTAX_GATEWAY] != NULL) { 902 RT_UNLOCK(rt); 903 RADIX_NODE_HEAD_LOCK(rnh); 904 RT_LOCK(rt); 905 906 error = rt_setgate(rt, rt_key(rt), 907 info.rti_info[RTAX_GATEWAY]); 908 RADIX_NODE_HEAD_UNLOCK(rnh); 909 if (error != 0) { 910 RT_UNLOCK(rt); 911 senderr(error); 912 } 913 rt->rt_flags &= ~RTF_GATEWAY; 914 rt->rt_flags |= (RTF_GATEWAY & info.rti_flags); 915 } 916 if (info.rti_ifa != NULL && 917 info.rti_ifa != rt->rt_ifa) { 918 ifa_ref(info.rti_ifa); 919 rt->rt_ifa = info.rti_ifa; 920 rt->rt_ifp = info.rti_ifp; 921 } 922 /* Allow some flags to be toggled on change. */ 923 rt->rt_flags = (rt->rt_flags & ~RTF_FMASK) | 924 (rtm->rtm_flags & RTF_FMASK); 925 rt_setmetrics(rtm, rt); 926 rtm->rtm_index = rt->rt_ifp->if_index; 927 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 928 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 929 /* FALLTHROUGH */ 930 case RTM_LOCK: 931 /* We don't support locks anymore */ 932 break; 933 } 934 RT_UNLOCK(rt); 935 break; 936 937 default: 938 senderr(EOPNOTSUPP); 939 } 940 941flush: 942 if (rtm) { 943 if (error) 944 rtm->rtm_errno = error; 945 else 946 rtm->rtm_flags |= RTF_DONE; 947 } 948 if (rt) /* XXX can this be true? */ 949 RTFREE(rt); 950 { 951 struct rawcb *rp = NULL; 952 /* 953 * Check to see if we don't want our own messages. 954 */ 955 if ((so->so_options & SO_USELOOPBACK) == 0) { 956 if (route_cb.any_count <= 1) { 957 if (rtm) 958 Free(rtm); 959 m_freem(m); 960 return (error); 961 } 962 /* There is another listener, so construct message */ 963 rp = sotorawcb(so); 964 } 965 if (rtm) { 966#ifdef INET6 967 if (rti_need_deembed) { 968 /* sin6_scope_id is recovered before sending rtm. */ 969 sin6 = (struct sockaddr_in6 *)&ss; 970 for (i = 0; i < RTAX_MAX; i++) { 971 if (info.rti_info[i] == NULL) 972 continue; 973 if (info.rti_info[i]->sa_family != AF_INET6) 974 continue; 975 bcopy(info.rti_info[i], sin6, sizeof(*sin6)); 976 if (sa6_recoverscope(sin6) == 0) 977 bcopy(sin6, info.rti_info[i], 978 sizeof(*sin6)); 979 } 980 } 981#endif 982 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 983 if (m->m_pkthdr.len < rtm->rtm_msglen) { 984 m_freem(m); 985 m = NULL; 986 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 987 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 988 } 989 if (m) { 990 M_SETFIB(m, so->so_fibnum); 991 m->m_flags |= RTS_FILTER_FIB; 992 if (rp) { 993 /* 994 * XXX insure we don't get a copy by 995 * invalidating our protocol 996 */ 997 unsigned short family = rp->rcb_proto.sp_family; 998 rp->rcb_proto.sp_family = 0; 999 rt_dispatch(m, saf); 1000 rp->rcb_proto.sp_family = family; 1001 } else 1002 rt_dispatch(m, saf); 1003 } 1004 /* info.rti_info[RTAX_DST] (used above) can point inside of rtm */ 1005 if (rtm) 1006 Free(rtm); 1007 } 1008 return (error); 1009#undef sa_equal 1010} 1011 1012static void 1013rt_setmetrics(const struct rt_msghdr *rtm, struct rtentry *rt) 1014{ 1015 1016 if (rtm->rtm_inits & RTV_MTU) 1017 rt->rt_mtu = rtm->rtm_rmx.rmx_mtu; 1018 if (rtm->rtm_inits & RTV_WEIGHT) 1019 rt->rt_weight = rtm->rtm_rmx.rmx_weight; 1020 /* Kernel -> userland timebase conversion. */ 1021 if (rtm->rtm_inits & RTV_EXPIRE) 1022 rt->rt_expire = rtm->rtm_rmx.rmx_expire ? 1023 rtm->rtm_rmx.rmx_expire - time_second + time_uptime : 0; 1024} 1025 1026static void 1027rt_getmetrics(const struct rtentry *rt, struct rt_metrics *out) 1028{ 1029 1030 bzero(out, sizeof(*out)); 1031 out->rmx_mtu = rt->rt_mtu; 1032 out->rmx_weight = rt->rt_weight; 1033 out->rmx_pksent = counter_u64_fetch(rt->rt_pksent); 1034 /* Kernel -> userland timebase conversion. */ 1035 out->rmx_expire = rt->rt_expire ? 1036 rt->rt_expire - time_uptime + time_second : 0; 1037} 1038 1039/* 1040 * Extract the addresses of the passed sockaddrs. 1041 * Do a little sanity checking so as to avoid bad memory references. 1042 * This data is derived straight from userland. 1043 */ 1044static int 1045rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 1046{ 1047 struct sockaddr *sa; 1048 int i; 1049 1050 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1051 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1052 continue; 1053 sa = (struct sockaddr *)cp; 1054 /* 1055 * It won't fit. 1056 */ 1057 if (cp + sa->sa_len > cplim) 1058 return (EINVAL); 1059 /* 1060 * there are no more.. quit now 1061 * If there are more bits, they are in error. 1062 * I've seen this. route(1) can evidently generate these. 1063 * This causes kernel to core dump. 1064 * for compatibility, If we see this, point to a safe address. 1065 */ 1066 if (sa->sa_len == 0) { 1067 rtinfo->rti_info[i] = &sa_zero; 1068 return (0); /* should be EINVAL but for compat */ 1069 } 1070 /* accept it */ 1071#ifdef INET6 1072 if (sa->sa_family == AF_INET6) 1073 sa6_embedscope((struct sockaddr_in6 *)sa, 1074 V_ip6_use_defzone); 1075#endif 1076 rtinfo->rti_info[i] = sa; 1077 cp += SA_SIZE(sa); 1078 } 1079 return (0); 1080} 1081 1082/* 1083 * Used by the routing socket. 1084 */ 1085static struct mbuf * 1086rt_msg1(int type, struct rt_addrinfo *rtinfo) 1087{ 1088 struct rt_msghdr *rtm; 1089 struct mbuf *m; 1090 int i; 1091 struct sockaddr *sa; 1092#ifdef INET6 1093 struct sockaddr_storage ss; 1094 struct sockaddr_in6 *sin6; 1095#endif 1096 int len, dlen; 1097 1098 switch (type) { 1099 1100 case RTM_DELADDR: 1101 case RTM_NEWADDR: 1102 len = sizeof(struct ifa_msghdr); 1103 break; 1104 1105 case RTM_DELMADDR: 1106 case RTM_NEWMADDR: 1107 len = sizeof(struct ifma_msghdr); 1108 break; 1109 1110 case RTM_IFINFO: 1111 len = sizeof(struct if_msghdr); 1112 break; 1113 1114 case RTM_IFANNOUNCE: 1115 case RTM_IEEE80211: 1116 len = sizeof(struct if_announcemsghdr); 1117 break; 1118 1119 default: 1120 len = sizeof(struct rt_msghdr); 1121 } 1122 1123 /* XXXGL: can we use MJUMPAGESIZE cluster here? */ 1124 KASSERT(len <= MCLBYTES, ("%s: message too big", __func__)); 1125 if (len > MHLEN) 1126 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1127 else 1128 m = m_gethdr(M_NOWAIT, MT_DATA); 1129 if (m == NULL) 1130 return (m); 1131 1132 m->m_pkthdr.len = m->m_len = len; 1133 rtm = mtod(m, struct rt_msghdr *); 1134 bzero((caddr_t)rtm, len); 1135 for (i = 0; i < RTAX_MAX; i++) { 1136 if ((sa = rtinfo->rti_info[i]) == NULL) 1137 continue; 1138 rtinfo->rti_addrs |= (1 << i); 1139 dlen = SA_SIZE(sa); 1140#ifdef INET6 1141 if (V_deembed_scopeid && sa->sa_family == AF_INET6) { 1142 sin6 = (struct sockaddr_in6 *)&ss; 1143 bcopy(sa, sin6, sizeof(*sin6)); 1144 if (sa6_recoverscope(sin6) == 0) 1145 sa = (struct sockaddr *)sin6; 1146 } 1147#endif 1148 m_copyback(m, len, dlen, (caddr_t)sa); 1149 len += dlen; 1150 } 1151 if (m->m_pkthdr.len != len) { 1152 m_freem(m); 1153 return (NULL); 1154 } 1155 rtm->rtm_msglen = len; 1156 rtm->rtm_version = RTM_VERSION; 1157 rtm->rtm_type = type; 1158 return (m); 1159} 1160 1161/* 1162 * Used by the sysctl code and routing socket. 1163 */ 1164static int 1165rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w) 1166{ 1167 int i; 1168 int len, dlen, second_time = 0; 1169 caddr_t cp0; 1170#ifdef INET6 1171 struct sockaddr_storage ss; 1172 struct sockaddr_in6 *sin6; 1173#endif 1174 1175 rtinfo->rti_addrs = 0; 1176again: 1177 switch (type) { 1178 1179 case RTM_DELADDR: 1180 case RTM_NEWADDR: 1181 if (w != NULL && w->w_op == NET_RT_IFLISTL) { 1182#ifdef COMPAT_FREEBSD32 1183 if (w->w_req->flags & SCTL_MASK32) 1184 len = sizeof(struct ifa_msghdrl32); 1185 else 1186#endif 1187 len = sizeof(struct ifa_msghdrl); 1188 } else 1189 len = sizeof(struct ifa_msghdr); 1190 break; 1191 1192 case RTM_IFINFO: 1193#ifdef COMPAT_FREEBSD32 1194 if (w != NULL && w->w_req->flags & SCTL_MASK32) { 1195 if (w->w_op == NET_RT_IFLISTL) 1196 len = sizeof(struct if_msghdrl32); 1197 else 1198 len = sizeof(struct if_msghdr32); 1199 break; 1200 } 1201#endif 1202 if (w != NULL && w->w_op == NET_RT_IFLISTL) 1203 len = sizeof(struct if_msghdrl); 1204 else 1205 len = sizeof(struct if_msghdr); 1206 break; 1207 1208 case RTM_NEWMADDR: 1209 len = sizeof(struct ifma_msghdr); 1210 break; 1211 1212 default: 1213 len = sizeof(struct rt_msghdr); 1214 } 1215 cp0 = cp; 1216 if (cp0) 1217 cp += len; 1218 for (i = 0; i < RTAX_MAX; i++) { 1219 struct sockaddr *sa; 1220 1221 if ((sa = rtinfo->rti_info[i]) == NULL) 1222 continue; 1223 rtinfo->rti_addrs |= (1 << i); 1224 dlen = SA_SIZE(sa); 1225 if (cp) { 1226#ifdef INET6 1227 if (V_deembed_scopeid && sa->sa_family == AF_INET6) { 1228 sin6 = (struct sockaddr_in6 *)&ss; 1229 bcopy(sa, sin6, sizeof(*sin6)); 1230 if (sa6_recoverscope(sin6) == 0) 1231 sa = (struct sockaddr *)sin6; 1232 } 1233#endif 1234 bcopy((caddr_t)sa, cp, (unsigned)dlen); 1235 cp += dlen; 1236 } 1237 len += dlen; 1238 } 1239 len = ALIGN(len); 1240 if (cp == NULL && w != NULL && !second_time) { 1241 struct walkarg *rw = w; 1242 1243 if (rw->w_req) { 1244 if (rw->w_tmemsize < len) { 1245 if (rw->w_tmem) 1246 free(rw->w_tmem, M_RTABLE); 1247 rw->w_tmem = (caddr_t) 1248 malloc(len, M_RTABLE, M_NOWAIT); 1249 if (rw->w_tmem) 1250 rw->w_tmemsize = len; 1251 } 1252 if (rw->w_tmem) { 1253 cp = rw->w_tmem; 1254 second_time = 1; 1255 goto again; 1256 } 1257 } 1258 } 1259 if (cp) { 1260 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 1261 1262 rtm->rtm_version = RTM_VERSION; 1263 rtm->rtm_type = type; 1264 rtm->rtm_msglen = len; 1265 } 1266 return (len); 1267} 1268 1269/* 1270 * This routine is called to generate a message from the routing 1271 * socket indicating that a redirect has occured, a routing lookup 1272 * has failed, or that a protocol has detected timeouts to a particular 1273 * destination. 1274 */ 1275void 1276rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error, 1277 int fibnum) 1278{ 1279 struct rt_msghdr *rtm; 1280 struct mbuf *m; 1281 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1282 1283 if (route_cb.any_count == 0) 1284 return; 1285 m = rt_msg1(type, rtinfo); 1286 if (m == NULL) 1287 return; 1288 1289 if (fibnum != RTS_ALLFIBS) { 1290 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out " 1291 "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs)); 1292 M_SETFIB(m, fibnum); 1293 m->m_flags |= RTS_FILTER_FIB; 1294 } 1295 1296 rtm = mtod(m, struct rt_msghdr *); 1297 rtm->rtm_flags = RTF_DONE | flags; 1298 rtm->rtm_errno = error; 1299 rtm->rtm_addrs = rtinfo->rti_addrs; 1300 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1301} 1302 1303void 1304rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 1305{ 1306 1307 rt_missmsg_fib(type, rtinfo, flags, error, RTS_ALLFIBS); 1308} 1309 1310/* 1311 * This routine is called to generate a message from the routing 1312 * socket indicating that the status of a network interface has changed. 1313 */ 1314void 1315rt_ifmsg(struct ifnet *ifp) 1316{ 1317 struct if_msghdr *ifm; 1318 struct mbuf *m; 1319 struct rt_addrinfo info; 1320 1321 if (route_cb.any_count == 0) 1322 return; 1323 bzero((caddr_t)&info, sizeof(info)); 1324 m = rt_msg1(RTM_IFINFO, &info); 1325 if (m == NULL) 1326 return; 1327 ifm = mtod(m, struct if_msghdr *); 1328 ifm->ifm_index = ifp->if_index; 1329 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1330 ifm->ifm_data = ifp->if_data; 1331 ifm->ifm_addrs = 0; 1332 rt_dispatch(m, AF_UNSPEC); 1333} 1334 1335/* 1336 * This is called to generate messages from the routing socket 1337 * indicating a network interface has had addresses associated with it. 1338 * if we ever reverse the logic and replace messages TO the routing 1339 * socket indicate a request to configure interfaces, then it will 1340 * be unnecessary as the routing socket will automatically generate 1341 * copies of it. 1342 */ 1343void 1344rt_newaddrmsg_fib(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt, 1345 int fibnum) 1346{ 1347 struct rt_addrinfo info; 1348 struct sockaddr *sa = NULL; 1349 int pass; 1350 struct mbuf *m = NULL; 1351 struct ifnet *ifp = ifa->ifa_ifp; 1352 1353 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 1354 ("unexpected cmd %u", cmd)); 1355#if defined(INET) || defined(INET6) 1356#ifdef SCTP 1357 /* 1358 * notify the SCTP stack 1359 * this will only get called when an address is added/deleted 1360 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1361 */ 1362 sctp_addr_change(ifa, cmd); 1363#endif /* SCTP */ 1364#endif 1365 if (route_cb.any_count == 0) 1366 return; 1367 for (pass = 1; pass < 3; pass++) { 1368 bzero((caddr_t)&info, sizeof(info)); 1369 if ((cmd == RTM_ADD && pass == 1) || 1370 (cmd == RTM_DELETE && pass == 2)) { 1371 struct ifa_msghdr *ifam; 1372 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 1373 1374 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1375 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 1376 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1377 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1378 if ((m = rt_msg1(ncmd, &info)) == NULL) 1379 continue; 1380 ifam = mtod(m, struct ifa_msghdr *); 1381 ifam->ifam_index = ifp->if_index; 1382 ifam->ifam_metric = ifa->ifa_metric; 1383 ifam->ifam_flags = ifa->ifa_flags; 1384 ifam->ifam_addrs = info.rti_addrs; 1385 } 1386 if ((cmd == RTM_ADD && pass == 2) || 1387 (cmd == RTM_DELETE && pass == 1)) { 1388 struct rt_msghdr *rtm; 1389 1390 if (rt == NULL) 1391 continue; 1392 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1393 info.rti_info[RTAX_DST] = sa = rt_key(rt); 1394 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1395 if ((m = rt_msg1(cmd, &info)) == NULL) 1396 continue; 1397 rtm = mtod(m, struct rt_msghdr *); 1398 rtm->rtm_index = ifp->if_index; 1399 rtm->rtm_flags |= rt->rt_flags; 1400 rtm->rtm_errno = error; 1401 rtm->rtm_addrs = info.rti_addrs; 1402 } 1403 if (fibnum != RTS_ALLFIBS) { 1404 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: " 1405 "fibnum out of range 0 <= %d < %d", __func__, 1406 fibnum, rt_numfibs)); 1407 M_SETFIB(m, fibnum); 1408 m->m_flags |= RTS_FILTER_FIB; 1409 } 1410 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC); 1411 } 1412} 1413 1414void 1415rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1416{ 1417 1418 rt_newaddrmsg_fib(cmd, ifa, error, rt, RTS_ALLFIBS); 1419} 1420 1421/* 1422 * This is the analogue to the rt_newaddrmsg which performs the same 1423 * function but for multicast group memberhips. This is easier since 1424 * there is no route state to worry about. 1425 */ 1426void 1427rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1428{ 1429 struct rt_addrinfo info; 1430 struct mbuf *m = NULL; 1431 struct ifnet *ifp = ifma->ifma_ifp; 1432 struct ifma_msghdr *ifmam; 1433 1434 if (route_cb.any_count == 0) 1435 return; 1436 1437 bzero((caddr_t)&info, sizeof(info)); 1438 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1439 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL; 1440 /* 1441 * If a link-layer address is present, present it as a ``gateway'' 1442 * (similarly to how ARP entries, e.g., are presented). 1443 */ 1444 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr; 1445 m = rt_msg1(cmd, &info); 1446 if (m == NULL) 1447 return; 1448 ifmam = mtod(m, struct ifma_msghdr *); 1449 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n", 1450 __func__)); 1451 ifmam->ifmam_index = ifp->if_index; 1452 ifmam->ifmam_addrs = info.rti_addrs; 1453 rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC); 1454} 1455 1456static struct mbuf * 1457rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1458 struct rt_addrinfo *info) 1459{ 1460 struct if_announcemsghdr *ifan; 1461 struct mbuf *m; 1462 1463 if (route_cb.any_count == 0) 1464 return NULL; 1465 bzero((caddr_t)info, sizeof(*info)); 1466 m = rt_msg1(type, info); 1467 if (m != NULL) { 1468 ifan = mtod(m, struct if_announcemsghdr *); 1469 ifan->ifan_index = ifp->if_index; 1470 strlcpy(ifan->ifan_name, ifp->if_xname, 1471 sizeof(ifan->ifan_name)); 1472 ifan->ifan_what = what; 1473 } 1474 return m; 1475} 1476 1477/* 1478 * This is called to generate routing socket messages indicating 1479 * IEEE80211 wireless events. 1480 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1481 */ 1482void 1483rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1484{ 1485 struct mbuf *m; 1486 struct rt_addrinfo info; 1487 1488 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1489 if (m != NULL) { 1490 /* 1491 * Append the ieee80211 data. Try to stick it in the 1492 * mbuf containing the ifannounce msg; otherwise allocate 1493 * a new mbuf and append. 1494 * 1495 * NB: we assume m is a single mbuf. 1496 */ 1497 if (data_len > M_TRAILINGSPACE(m)) { 1498 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1499 if (n == NULL) { 1500 m_freem(m); 1501 return; 1502 } 1503 bcopy(data, mtod(n, void *), data_len); 1504 n->m_len = data_len; 1505 m->m_next = n; 1506 } else if (data_len > 0) { 1507 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1508 m->m_len += data_len; 1509 } 1510 if (m->m_flags & M_PKTHDR) 1511 m->m_pkthdr.len += data_len; 1512 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1513 rt_dispatch(m, AF_UNSPEC); 1514 } 1515} 1516 1517/* 1518 * This is called to generate routing socket messages indicating 1519 * network interface arrival and departure. 1520 */ 1521void 1522rt_ifannouncemsg(struct ifnet *ifp, int what) 1523{ 1524 struct mbuf *m; 1525 struct rt_addrinfo info; 1526 1527 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1528 if (m != NULL) 1529 rt_dispatch(m, AF_UNSPEC); 1530} 1531 1532static void 1533rt_dispatch(struct mbuf *m, sa_family_t saf) 1534{ 1535 struct m_tag *tag; 1536 1537 /* 1538 * Preserve the family from the sockaddr, if any, in an m_tag for 1539 * use when injecting the mbuf into the routing socket buffer from 1540 * the netisr. 1541 */ 1542 if (saf != AF_UNSPEC) { 1543 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short), 1544 M_NOWAIT); 1545 if (tag == NULL) { 1546 m_freem(m); 1547 return; 1548 } 1549 *(unsigned short *)(tag + 1) = saf; 1550 m_tag_prepend(m, tag); 1551 } 1552#ifdef VIMAGE 1553 if (V_loif) 1554 m->m_pkthdr.rcvif = V_loif; 1555 else { 1556 m_freem(m); 1557 return; 1558 } 1559#endif 1560 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */ 1561} 1562 1563/* 1564 * This is used in dumping the kernel table via sysctl(). 1565 */ 1566static int 1567sysctl_dumpentry(struct radix_node *rn, void *vw) 1568{ 1569 struct walkarg *w = vw; 1570 struct rtentry *rt = (struct rtentry *)rn; 1571 int error = 0, size; 1572 struct rt_addrinfo info; 1573 1574 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1575 return 0; 1576 if ((rt->rt_flags & RTF_HOST) == 0 1577 ? jailed_without_vnet(w->w_req->td->td_ucred) 1578 : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0) 1579 return (0); 1580 bzero((caddr_t)&info, sizeof(info)); 1581 info.rti_info[RTAX_DST] = rt_key(rt); 1582 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1583 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1584 info.rti_info[RTAX_GENMASK] = 0; 1585 if (rt->rt_ifp) { 1586 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr; 1587 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1588 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1589 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr; 1590 } 1591 size = rt_msg2(RTM_GET, &info, NULL, w); 1592 if (w->w_req && w->w_tmem) { 1593 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 1594 1595 if (rt->rt_flags & RTF_GWFLAG_COMPAT) 1596 rtm->rtm_flags = RTF_GATEWAY | 1597 (rt->rt_flags & ~RTF_GWFLAG_COMPAT); 1598 else 1599 rtm->rtm_flags = rt->rt_flags; 1600 rt_getmetrics(rt, &rtm->rtm_rmx); 1601 rtm->rtm_index = rt->rt_ifp->if_index; 1602 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1603 rtm->rtm_addrs = info.rti_addrs; 1604 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 1605 return (error); 1606 } 1607 return (error); 1608} 1609 1610#ifdef COMPAT_FREEBSD32 1611static void 1612copy_ifdata32(struct if_data *src, struct if_data32 *dst) 1613{ 1614 1615 bzero(dst, sizeof(*dst)); 1616 CP(*src, *dst, ifi_type); 1617 CP(*src, *dst, ifi_physical); 1618 CP(*src, *dst, ifi_addrlen); 1619 CP(*src, *dst, ifi_hdrlen); 1620 CP(*src, *dst, ifi_link_state); 1621 CP(*src, *dst, ifi_vhid); 1622 CP(*src, *dst, ifi_baudrate_pf); 1623 dst->ifi_datalen = sizeof(struct if_data32); 1624 CP(*src, *dst, ifi_mtu); 1625 CP(*src, *dst, ifi_metric); 1626 CP(*src, *dst, ifi_baudrate); 1627 CP(*src, *dst, ifi_ipackets); 1628 CP(*src, *dst, ifi_ierrors); 1629 CP(*src, *dst, ifi_opackets); 1630 CP(*src, *dst, ifi_oerrors); 1631 CP(*src, *dst, ifi_collisions); 1632 CP(*src, *dst, ifi_ibytes); 1633 CP(*src, *dst, ifi_obytes); 1634 CP(*src, *dst, ifi_imcasts); 1635 CP(*src, *dst, ifi_omcasts); 1636 CP(*src, *dst, ifi_iqdrops); 1637 CP(*src, *dst, ifi_noproto); 1638 CP(*src, *dst, ifi_hwassist); 1639 CP(*src, *dst, ifi_epoch); 1640 TV_CP(*src, *dst, ifi_lastchange); 1641} 1642#endif 1643 1644static int 1645sysctl_iflist_ifml(struct ifnet *ifp, struct rt_addrinfo *info, 1646 struct walkarg *w, int len) 1647{ 1648 struct if_msghdrl *ifm; 1649 1650#ifdef COMPAT_FREEBSD32 1651 if (w->w_req->flags & SCTL_MASK32) { 1652 struct if_msghdrl32 *ifm32; 1653 1654 ifm32 = (struct if_msghdrl32 *)w->w_tmem; 1655 ifm32->ifm_addrs = info->rti_addrs; 1656 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1657 ifm32->ifm_index = ifp->if_index; 1658 ifm32->_ifm_spare1 = 0; 1659 ifm32->ifm_len = sizeof(*ifm32); 1660 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data); 1661 1662 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data); 1663 /* Fixup if_data carp(4) vhid. */ 1664 if (carp_get_vhid_p != NULL) 1665 ifm32->ifm_data.ifi_vhid = 1666 (*carp_get_vhid_p)(ifp->if_addr); 1667 ifm32->ifm_data.ifi_oqdrops = ifp->if_snd.ifq_drops; 1668 1669 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len)); 1670 } 1671#endif 1672 ifm = (struct if_msghdrl *)w->w_tmem; 1673 ifm->ifm_addrs = info->rti_addrs; 1674 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1675 ifm->ifm_index = ifp->if_index; 1676 ifm->_ifm_spare1 = 0; 1677 ifm->ifm_len = sizeof(*ifm); 1678 ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data); 1679 1680 ifm->ifm_data = ifp->if_data; 1681 /* Fixup if_data carp(4) vhid. */ 1682 if (carp_get_vhid_p != NULL) 1683 ifm->ifm_data.ifi_vhid = (*carp_get_vhid_p)(ifp->if_addr); 1684 1685 ifm->ifm_data.ifi_datalen += sizeof(u_long); 1686 ifm->ifi_oqdrops = ifp->if_snd.ifq_drops; 1687 1688 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len)); 1689} 1690 1691static int 1692sysctl_iflist_ifm(struct ifnet *ifp, struct rt_addrinfo *info, 1693 struct walkarg *w, int len) 1694{ 1695 struct if_msghdr *ifm; 1696 1697#ifdef COMPAT_FREEBSD32 1698 if (w->w_req->flags & SCTL_MASK32) { 1699 struct if_msghdr32 *ifm32; 1700 1701 ifm32 = (struct if_msghdr32 *)w->w_tmem; 1702 ifm32->ifm_addrs = info->rti_addrs; 1703 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1704 ifm32->ifm_index = ifp->if_index; 1705 1706 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data); 1707 /* Fixup if_data carp(4) vhid. */ 1708 if (carp_get_vhid_p != NULL) 1709 ifm32->ifm_data.ifi_vhid = 1710 (*carp_get_vhid_p)(ifp->if_addr); 1711 1712 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len)); 1713 } 1714#endif 1715 ifm = (struct if_msghdr *)w->w_tmem; 1716 ifm->ifm_addrs = info->rti_addrs; 1717 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1718 ifm->ifm_index = ifp->if_index; 1719 1720 ifm->ifm_data = ifp->if_data; 1721 /* Fixup if_data carp(4) vhid. */ 1722 if (carp_get_vhid_p != NULL) 1723 ifm->ifm_data.ifi_vhid = (*carp_get_vhid_p)(ifp->if_addr); 1724 1725 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len)); 1726} 1727 1728static int 1729sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info, 1730 struct walkarg *w, int len) 1731{ 1732 struct ifa_msghdrl *ifam; 1733 1734#ifdef COMPAT_FREEBSD32 1735 if (w->w_req->flags & SCTL_MASK32) { 1736 struct ifa_msghdrl32 *ifam32; 1737 1738 ifam32 = (struct ifa_msghdrl32 *)w->w_tmem; 1739 ifam32->ifam_addrs = info->rti_addrs; 1740 ifam32->ifam_flags = ifa->ifa_flags; 1741 ifam32->ifam_index = ifa->ifa_ifp->if_index; 1742 ifam32->_ifam_spare1 = 0; 1743 ifam32->ifam_len = sizeof(*ifam32); 1744 ifam32->ifam_data_off = 1745 offsetof(struct ifa_msghdrl32, ifam_data); 1746 ifam32->ifam_metric = ifa->ifa_metric; 1747 1748 copy_ifdata32(&ifa->ifa_ifp->if_data, &ifam32->ifam_data); 1749 /* Fixup if_data carp(4) vhid. */ 1750 if (carp_get_vhid_p != NULL) 1751 ifam32->ifam_data.ifi_vhid = (*carp_get_vhid_p)(ifa); 1752 1753 return (SYSCTL_OUT(w->w_req, (caddr_t)ifam32, len)); 1754 } 1755#endif 1756 1757 ifam = (struct ifa_msghdrl *)w->w_tmem; 1758 ifam->ifam_addrs = info->rti_addrs; 1759 ifam->ifam_flags = ifa->ifa_flags; 1760 ifam->ifam_index = ifa->ifa_ifp->if_index; 1761 ifam->_ifam_spare1 = 0; 1762 ifam->ifam_len = sizeof(*ifam); 1763 ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data); 1764 ifam->ifam_metric = ifa->ifa_metric; 1765 1766 ifam->ifam_data = ifa->if_data; 1767 /* Fixup if_data carp(4) vhid. */ 1768 if (carp_get_vhid_p != NULL) 1769 ifam->ifam_data.ifi_vhid = (*carp_get_vhid_p)(ifa); 1770 1771 return (SYSCTL_OUT(w->w_req, w->w_tmem, len)); 1772} 1773 1774static int 1775sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info, 1776 struct walkarg *w, int len) 1777{ 1778 struct ifa_msghdr *ifam; 1779 1780 ifam = (struct ifa_msghdr *)w->w_tmem; 1781 ifam->ifam_addrs = info->rti_addrs; 1782 ifam->ifam_flags = ifa->ifa_flags; 1783 ifam->ifam_index = ifa->ifa_ifp->if_index; 1784 ifam->ifam_metric = ifa->ifa_metric; 1785 1786 return (SYSCTL_OUT(w->w_req, w->w_tmem, len)); 1787} 1788 1789static int 1790sysctl_iflist(int af, struct walkarg *w) 1791{ 1792 struct ifnet *ifp; 1793 struct ifaddr *ifa; 1794 struct rt_addrinfo info; 1795 int len, error = 0; 1796 1797 bzero((caddr_t)&info, sizeof(info)); 1798 IFNET_RLOCK_NOSLEEP(); 1799 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1800 if (w->w_arg && w->w_arg != ifp->if_index) 1801 continue; 1802 IF_ADDR_RLOCK(ifp); 1803 ifa = ifp->if_addr; 1804 info.rti_info[RTAX_IFP] = ifa->ifa_addr; 1805 len = rt_msg2(RTM_IFINFO, &info, NULL, w); 1806 info.rti_info[RTAX_IFP] = NULL; 1807 if (w->w_req && w->w_tmem) { 1808 if (w->w_op == NET_RT_IFLISTL) 1809 error = sysctl_iflist_ifml(ifp, &info, w, len); 1810 else 1811 error = sysctl_iflist_ifm(ifp, &info, w, len); 1812 if (error) 1813 goto done; 1814 } 1815 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1816 if (af && af != ifa->ifa_addr->sa_family) 1817 continue; 1818 if (prison_if(w->w_req->td->td_ucred, 1819 ifa->ifa_addr) != 0) 1820 continue; 1821 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1822 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1823 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1824 len = rt_msg2(RTM_NEWADDR, &info, NULL, w); 1825 if (w->w_req && w->w_tmem) { 1826 if (w->w_op == NET_RT_IFLISTL) 1827 error = sysctl_iflist_ifaml(ifa, &info, 1828 w, len); 1829 else 1830 error = sysctl_iflist_ifam(ifa, &info, 1831 w, len); 1832 if (error) 1833 goto done; 1834 } 1835 } 1836 IF_ADDR_RUNLOCK(ifp); 1837 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1838 info.rti_info[RTAX_BRD] = NULL; 1839 } 1840done: 1841 if (ifp != NULL) 1842 IF_ADDR_RUNLOCK(ifp); 1843 IFNET_RUNLOCK_NOSLEEP(); 1844 return (error); 1845} 1846 1847static int 1848sysctl_ifmalist(int af, struct walkarg *w) 1849{ 1850 struct ifnet *ifp; 1851 struct ifmultiaddr *ifma; 1852 struct rt_addrinfo info; 1853 int len, error = 0; 1854 struct ifaddr *ifa; 1855 1856 bzero((caddr_t)&info, sizeof(info)); 1857 IFNET_RLOCK_NOSLEEP(); 1858 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1859 if (w->w_arg && w->w_arg != ifp->if_index) 1860 continue; 1861 ifa = ifp->if_addr; 1862 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL; 1863 IF_ADDR_RLOCK(ifp); 1864 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1865 if (af && af != ifma->ifma_addr->sa_family) 1866 continue; 1867 if (prison_if(w->w_req->td->td_ucred, 1868 ifma->ifma_addr) != 0) 1869 continue; 1870 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1871 info.rti_info[RTAX_GATEWAY] = 1872 (ifma->ifma_addr->sa_family != AF_LINK) ? 1873 ifma->ifma_lladdr : NULL; 1874 len = rt_msg2(RTM_NEWMADDR, &info, NULL, w); 1875 if (w->w_req && w->w_tmem) { 1876 struct ifma_msghdr *ifmam; 1877 1878 ifmam = (struct ifma_msghdr *)w->w_tmem; 1879 ifmam->ifmam_index = ifma->ifma_ifp->if_index; 1880 ifmam->ifmam_flags = 0; 1881 ifmam->ifmam_addrs = info.rti_addrs; 1882 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1883 if (error) { 1884 IF_ADDR_RUNLOCK(ifp); 1885 goto done; 1886 } 1887 } 1888 } 1889 IF_ADDR_RUNLOCK(ifp); 1890 } 1891done: 1892 IFNET_RUNLOCK_NOSLEEP(); 1893 return (error); 1894} 1895 1896static int 1897sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1898{ 1899 int *name = (int *)arg1; 1900 u_int namelen = arg2; 1901 struct radix_node_head *rnh = NULL; /* silence compiler. */ 1902 int i, lim, error = EINVAL; 1903 int fib = 0; 1904 u_char af; 1905 struct walkarg w; 1906 1907 name ++; 1908 namelen--; 1909 if (req->newptr) 1910 return (EPERM); 1911 if (name[1] == NET_RT_DUMP) { 1912 if (namelen == 3) 1913 fib = req->td->td_proc->p_fibnum; 1914 else if (namelen == 4) 1915 fib = (name[3] == -1) ? 1916 req->td->td_proc->p_fibnum : name[3]; 1917 else 1918 return ((namelen < 3) ? EISDIR : ENOTDIR); 1919 if (fib < 0 || fib >= rt_numfibs) 1920 return (EINVAL); 1921 } else if (namelen != 3) 1922 return ((namelen < 3) ? EISDIR : ENOTDIR); 1923 af = name[0]; 1924 if (af > AF_MAX) 1925 return (EINVAL); 1926 bzero(&w, sizeof(w)); 1927 w.w_op = name[1]; 1928 w.w_arg = name[2]; 1929 w.w_req = req; 1930 1931 error = sysctl_wire_old_buffer(req, 0); 1932 if (error) 1933 return (error); 1934 switch (w.w_op) { 1935 1936 case NET_RT_DUMP: 1937 case NET_RT_FLAGS: 1938 if (af == 0) { /* dump all tables */ 1939 i = 1; 1940 lim = AF_MAX; 1941 } else /* dump only one table */ 1942 i = lim = af; 1943 1944 /* 1945 * take care of llinfo entries, the caller must 1946 * specify an AF 1947 */ 1948 if (w.w_op == NET_RT_FLAGS && 1949 (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) { 1950 if (af != 0) 1951 error = lltable_sysctl_dumparp(af, w.w_req); 1952 else 1953 error = EINVAL; 1954 break; 1955 } 1956 /* 1957 * take care of routing entries 1958 */ 1959 for (error = 0; error == 0 && i <= lim; i++) { 1960 rnh = rt_tables_get_rnh(fib, i); 1961 if (rnh != NULL) { 1962 RADIX_NODE_HEAD_RLOCK(rnh); 1963 error = rnh->rnh_walktree(rnh, 1964 sysctl_dumpentry, &w); 1965 RADIX_NODE_HEAD_RUNLOCK(rnh); 1966 } else if (af != 0) 1967 error = EAFNOSUPPORT; 1968 } 1969 break; 1970 1971 case NET_RT_IFLIST: 1972 case NET_RT_IFLISTL: 1973 error = sysctl_iflist(af, &w); 1974 break; 1975 1976 case NET_RT_IFMALIST: 1977 error = sysctl_ifmalist(af, &w); 1978 break; 1979 } 1980 if (w.w_tmem) 1981 free(w.w_tmem, M_RTABLE); 1982 return (error); 1983} 1984 1985static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1986 1987/* 1988 * Definitions of protocols supported in the ROUTE domain. 1989 */ 1990 1991static struct domain routedomain; /* or at least forward */ 1992 1993static struct protosw routesw[] = { 1994{ 1995 .pr_type = SOCK_RAW, 1996 .pr_domain = &routedomain, 1997 .pr_flags = PR_ATOMIC|PR_ADDR, 1998 .pr_output = route_output, 1999 .pr_ctlinput = raw_ctlinput, 2000 .pr_init = raw_init, 2001 .pr_usrreqs = &route_usrreqs 2002} 2003}; 2004 2005static struct domain routedomain = { 2006 .dom_family = PF_ROUTE, 2007 .dom_name = "route", 2008 .dom_protosw = routesw, 2009 .dom_protoswNPROTOSW = &routesw[sizeof(routesw)/sizeof(routesw[0])] 2010}; 2011 2012VNET_DOMAIN_SET(route); 2013