sys/net/rtsock.c

   1 /*-
   2  * Copyright (c) 1988, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)rtsock.c    8.7 (Berkeley) 10/12/95
  30  * $FreeBSD$
  31  */
  32 #include "opt_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_dl.h>
  56 #include <net/if_llatbl.h>
  57 #include <net/if_types.h>
  58 #include <net/netisr.h>
  59 #include <net/raw_cb.h>
  60 #include <net/route.h>
  61 #include <net/vnet.h>
  62
  63 #include <netinet/in.h>
  64 #include <netinet/if_ether.h>
  65 #ifdef INET6
  66 #include <netinet6/scope6_var.h>
  67 #endif
  68
  69 #ifdef COMPAT_FREEBSD32
  70 #include <sys/mount.h>
  71 #include <compat/freebsd32/freebsd32.h>
  72
  73 struct if_data32 {
  74         uint8_t ifi_type;
  75         uint8_t ifi_physical;
  76         uint8_t ifi_addrlen;
  77         uint8_t ifi_hdrlen;
  78         uint8_t ifi_link_state;
  79         uint8_t ifi_spare_char1;
  80         uint8_t ifi_spare_char2;
  81         uint8_t ifi_datalen;
  82         uint32_t ifi_mtu;
  83         uint32_t ifi_metric;
  84         uint32_t ifi_baudrate;
  85         uint32_t ifi_ipackets;
  86         uint32_t ifi_ierrors;
  87         uint32_t ifi_opackets;
  88         uint32_t ifi_oerrors;
  89         uint32_t ifi_collisions;
  90         uint32_t ifi_ibytes;
  91         uint32_t ifi_obytes;
  92         uint32_t ifi_imcasts;
  93         uint32_t ifi_omcasts;
  94         uint32_t ifi_iqdrops;
  95         uint32_t ifi_noproto;
  96         uint32_t ifi_hwassist;
  97         int32_t ifi_epoch;
  98         struct  timeval32 ifi_lastchange;
  99 };
 100
 101 struct if_msghdr32 {
 102         uint16_t ifm_msglen;
 103         uint8_t ifm_version;
 104         uint8_t ifm_type;
 105         int32_t ifm_addrs;
 106         int32_t ifm_flags;
 107         uint16_t ifm_index;
 108         struct  if_data32 ifm_data;
 109 };
 110
 111 struct if_msghdrl32 {
 112         uint16_t ifm_msglen;
 113         uint8_t ifm_version;
 114         uint8_t ifm_type;
 115         int32_t ifm_addrs;
 116         int32_t ifm_flags;
 117         uint16_t ifm_index;
 118         uint16_t _ifm_spare1;
 119         uint16_t ifm_len;
 120         uint16_t ifm_data_off;
 121         struct  if_data32 ifm_data;
 122 };
 123
 124 struct ifa_msghdrl32 {
 125         uint16_t ifam_msglen;
 126         uint8_t ifam_version;
 127         uint8_t ifam_type;
 128         int32_t ifam_addrs;
 129         int32_t ifam_flags;
 130         uint16_t ifam_index;
 131         uint16_t _ifam_spare1;
 132         uint16_t ifam_len;
 133         uint16_t ifam_data_off;
 134         int32_t ifam_metric;
 135         struct  if_data32 ifam_data;
 136 };
 137 #endif /* COMPAT_FREEBSD32 */
 138
 139 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
 140
 141 /* NB: these are not modified */
 142 static struct   sockaddr route_src = { 2, PF_ROUTE, };
 143 static struct   sockaddr sa_zero   = { sizeof(sa_zero), AF_INET, };
 144
 145 /*
 146  * Used by rtsock/raw_input callback code to decide whether to filter the update
 147  * notification to a socket bound to a particular FIB.
 148  */
 149 #define RTS_FILTER_FIB  M_PROTO8
 150
 151 static struct {
 152         int     ip_count;       /* attached w/ AF_INET */
 153         int     ip6_count;      /* attached w/ AF_INET6 */
 154         int     ipx_count;      /* attached w/ AF_IPX */
 155         int     any_count;      /* total attached */
 156 } route_cb;
 157
 158 struct mtx rtsock_mtx;
 159 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
 160
 161 #define RTSOCK_LOCK()   mtx_lock(&rtsock_mtx)
 162 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
 163 #define RTSOCK_LOCK_ASSERT()    mtx_assert(&rtsock_mtx, MA_OWNED)
 164
 165 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
 166
 167 struct walkarg {
 168         int     w_tmemsize;
 169         int     w_op, w_arg;
 170         caddr_t w_tmem;
 171         struct sysctl_req *w_req;
 172 };
 173
 174 static void     rts_input(struct mbuf *m);
 175 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo);
 176 static int      rt_msg2(int type, struct rt_addrinfo *rtinfo,
 177                         caddr_t cp, struct walkarg *w);
 178 static int      rt_xaddrs(caddr_t cp, caddr_t cplim,
 179                         struct rt_addrinfo *rtinfo);
 180 static int      sysctl_dumpentry(struct radix_node *rn, void *vw);
 181 static int      sysctl_iflist(int af, struct walkarg *w);
 182 static int      sysctl_ifmalist(int af, struct walkarg *w);
 183 static int      route_output(struct mbuf *m, struct socket *so);
 184 static void     rt_setmetrics(u_long which, const struct rt_metrics *in,
 185                         struct rt_metrics_lite *out);
 186 static void     rt_getmetrics(const struct rt_metrics_lite *in,
 187                         struct rt_metrics *out);
 188 static void     rt_dispatch(struct mbuf *, sa_family_t);
 189
 190 static struct netisr_handler rtsock_nh = {
 191         .nh_name = "rtsock",
 192         .nh_handler = rts_input,
 193         .nh_proto = NETISR_ROUTE,
 194         .nh_policy = NETISR_POLICY_SOURCE,
 195 };
 196
 197 static int
 198 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)
 199 {
 200         int error, qlimit;
 201
 202         netisr_getqlimit(&rtsock_nh, &qlimit);
 203         error = sysctl_handle_int(oidp, &qlimit, 0, req);
 204         if (error || !req->newptr)
 205                 return (error);
 206         if (qlimit < 1)
 207                 return (EINVAL);
 208         return (netisr_setqlimit(&rtsock_nh, qlimit));
 209 }
 210 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
 211     0, 0, sysctl_route_netisr_maxqlen, "I",
 212     "maximum routing socket dispatch queue length");
 213
 214 static void
 215 rts_init(void)
 216 {
 217         int tmp;
 218
 219         if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
 220                 rtsock_nh.nh_qlimit = tmp;
 221         netisr_register(&rtsock_nh);
 222 }
 223 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0);
 224
 225 static int
 226 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src,
 227     struct rawcb *rp)
 228 {
 229         int fibnum;
 230
 231         KASSERT(m != NULL, ("%s: m is NULL", __func__));
 232         KASSERT(proto != NULL, ("%s: proto is NULL", __func__));
 233         KASSERT(rp != NULL, ("%s: rp is NULL", __func__));
 234
 235         /* No filtering requested. */
 236         if ((m->m_flags & RTS_FILTER_FIB) == 0)
 237                 return (0);
 238
 239         /* Check if it is a rts and the fib matches the one of the socket. */
 240         fibnum = M_GETFIB(m);
 241         if (proto->sp_family != PF_ROUTE ||
 242             rp->rcb_socket == NULL ||
 243             rp->rcb_socket->so_fibnum == fibnum)
 244                 return (0);
 245
 246         /* Filtering requested and no match, the socket shall be skipped. */
 247         return (1);
 248 }
 249
 250 static void
 251 rts_input(struct mbuf *m)
 252 {
 253         struct sockproto route_proto;
 254         unsigned short *family;
 255         struct m_tag *tag;
 256
 257         route_proto.sp_family = PF_ROUTE;
 258         tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
 259         if (tag != NULL) {
 260                 family = (unsigned short *)(tag + 1);
 261                 route_proto.sp_protocol = *family;
 262                 m_tag_delete(m, tag);
 263         } else
 264                 route_proto.sp_protocol = 0;
 265
 266         raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb);
 267 }
 268
 269 /*
 270  * It really doesn't make any sense at all for this code to share much
 271  * with raw_usrreq.c, since its functionality is so restricted.  XXX
 272  */
 273 static void
 274 rts_abort(struct socket *so)
 275 {
 276
 277         raw_usrreqs.pru_abort(so);
 278 }
 279
 280 static void
 281 rts_close(struct socket *so)
 282 {
 283
 284         raw_usrreqs.pru_close(so);
 285 }
 286
 287 /* pru_accept is EOPNOTSUPP */
 288
 289 static int
 290 rts_attach(struct socket *so, int proto, struct thread *td)
 291 {
 292         struct rawcb *rp;
 293         int s, error;
 294
 295         KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
 296
 297         /* XXX */
 298         rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
 299         if (rp == NULL)
 300                 return ENOBUFS;
 301
 302         /*
 303          * The splnet() is necessary to block protocols from sending
 304          * error notifications (like RTM_REDIRECT or RTM_LOSING) while
 305          * this PCB is extant but incompletely initialized.
 306          * Probably we should try to do more of this work beforehand and
 307          * eliminate the spl.
 308          */
 309         s = splnet();
 310         so->so_pcb = (caddr_t)rp;
 311         so->so_fibnum = td->td_proc->p_fibnum;
 312         error = raw_attach(so, proto);
 313         rp = sotorawcb(so);
 314         if (error) {
 315                 splx(s);
 316                 so->so_pcb = NULL;
 317                 free(rp, M_PCB);
 318                 return error;
 319         }
 320         RTSOCK_LOCK();
 321         switch(rp->rcb_proto.sp_protocol) {
 322         case AF_INET:
 323                 route_cb.ip_count++;
 324                 break;
 325         case AF_INET6:
 326                 route_cb.ip6_count++;
 327                 break;
 328         case AF_IPX:
 329                 route_cb.ipx_count++;
 330                 break;
 331         }
 332         route_cb.any_count++;
 333         RTSOCK_UNLOCK();
 334         soisconnected(so);
 335         so->so_options |= SO_USELOOPBACK;
 336         splx(s);
 337         return 0;
 338 }
 339
 340 static int
 341 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 342 {
 343
 344         return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
 345 }
 346
 347 static int
 348 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 349 {
 350
 351         return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
 352 }
 353
 354 /* pru_connect2 is EOPNOTSUPP */
 355 /* pru_control is EOPNOTSUPP */
 356
 357 static void
 358 rts_detach(struct socket *so)
 359 {
 360         struct rawcb *rp = sotorawcb(so);
 361
 362         KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
 363
 364         RTSOCK_LOCK();
 365         switch(rp->rcb_proto.sp_protocol) {
 366         case AF_INET:
 367                 route_cb.ip_count--;
 368                 break;
 369         case AF_INET6:
 370                 route_cb.ip6_count--;
 371                 break;
 372         case AF_IPX:
 373                 route_cb.ipx_count--;
 374                 break;
 375         }
 376         route_cb.any_count--;
 377         RTSOCK_UNLOCK();
 378         raw_usrreqs.pru_detach(so);
 379 }
 380
 381 static int
 382 rts_disconnect(struct socket *so)
 383 {
 384
 385         return (raw_usrreqs.pru_disconnect(so));
 386 }
 387
 388 /* pru_listen is EOPNOTSUPP */
 389
 390 static int
 391 rts_peeraddr(struct socket *so, struct sockaddr **nam)
 392 {
 393
 394         return (raw_usrreqs.pru_peeraddr(so, nam));
 395 }
 396
 397 /* pru_rcvd is EOPNOTSUPP */
 398 /* pru_rcvoob is EOPNOTSUPP */
 399
 400 static int
 401 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 402          struct mbuf *control, struct thread *td)
 403 {
 404
 405         return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
 406 }
 407
 408 /* pru_sense is null */
 409
 410 static int
 411 rts_shutdown(struct socket *so)
 412 {
 413
 414         return (raw_usrreqs.pru_shutdown(so));
 415 }
 416
 417 static int
 418 rts_sockaddr(struct socket *so, struct sockaddr **nam)
 419 {
 420
 421         return (raw_usrreqs.pru_sockaddr(so, nam));
 422 }
 423
 424 static struct pr_usrreqs route_usrreqs = {
 425         .pru_abort =            rts_abort,
 426         .pru_attach =           rts_attach,
 427         .pru_bind =             rts_bind,
 428         .pru_connect =          rts_connect,
 429         .pru_detach =           rts_detach,
 430         .pru_disconnect =       rts_disconnect,
 431         .pru_peeraddr =         rts_peeraddr,
 432         .pru_send =             rts_send,
 433         .pru_shutdown =         rts_shutdown,
 434         .pru_sockaddr =         rts_sockaddr,
 435         .pru_close =            rts_close,
 436 };
 437
 438 #ifndef _SOCKADDR_UNION_DEFINED
 439 #define _SOCKADDR_UNION_DEFINED
 440 /*
 441  * The union of all possible address formats we handle.
 442  */
 443 union sockaddr_union {
 444         struct sockaddr         sa;
 445         struct sockaddr_in      sin;
 446         struct sockaddr_in6     sin6;
 447 };
 448 #endif /* _SOCKADDR_UNION_DEFINED */
 449
 450 static int
 451 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
 452     struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred)
 453 {
 454
 455         /* First, see if the returned address is part of the jail. */
 456         if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) {
 457                 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
 458                 return (0);
 459         }
 460
 461         switch (info->rti_info[RTAX_DST]->sa_family) {
 462 #ifdef INET
 463         case AF_INET:
 464         {
 465                 struct in_addr ia;
 466                 struct ifaddr *ifa;
 467                 int found;
 468
 469                 found = 0;
 470                 /*
 471                  * Try to find an address on the given outgoing interface
 472                  * that belongs to the jail.
 473                  */
 474                 IF_ADDR_RLOCK(ifp);
 475                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 476                         struct sockaddr *sa;
 477                         sa = ifa->ifa_addr;
 478                         if (sa->sa_family != AF_INET)
 479                                 continue;
 480                         ia = ((struct sockaddr_in *)sa)->sin_addr;
 481                         if (prison_check_ip4(cred, &ia) == 0) {
 482                                 found = 1;
 483                                 break;
 484                         }
 485                 }
 486                 IF_ADDR_RUNLOCK(ifp);
 487                 if (!found) {
 488                         /*
 489                          * As a last resort return the 'default' jail address.
 490                          */
 491                         ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->
 492                             sin_addr;
 493                         if (prison_get_ip4(cred, &ia) != 0)
 494                                 return (ESRCH);
 495                 }
 496                 bzero(&saun->sin, sizeof(struct sockaddr_in));
 497                 saun->sin.sin_len = sizeof(struct sockaddr_in);
 498                 saun->sin.sin_family = AF_INET;
 499                 saun->sin.sin_addr.s_addr = ia.s_addr;
 500                 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
 501                 break;
 502         }
 503 #endif
 504 #ifdef INET6
 505         case AF_INET6:
 506         {
 507                 struct in6_addr ia6;
 508                 struct ifaddr *ifa;
 509                 int found;
 510
 511                 found = 0;
 512                 /*
 513                  * Try to find an address on the given outgoing interface
 514                  * that belongs to the jail.
 515                  */
 516                 IF_ADDR_RLOCK(ifp);
 517                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 518                         struct sockaddr *sa;
 519                         sa = ifa->ifa_addr;
 520                         if (sa->sa_family != AF_INET6)
 521                                 continue;
 522                         bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
 523                             &ia6, sizeof(struct in6_addr));
 524                         if (prison_check_ip6(cred, &ia6) == 0) {
 525                                 found = 1;
 526                                 break;
 527                         }
 528                 }
 529                 IF_ADDR_RUNLOCK(ifp);
 530                 if (!found) {
 531                         /*
 532                          * As a last resort return the 'default' jail address.
 533                          */
 534                         ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)->
 535                             sin6_addr;
 536                         if (prison_get_ip6(cred, &ia6) != 0)
 537                                 return (ESRCH);
 538                 }
 539                 bzero(&saun->sin6, sizeof(struct sockaddr_in6));
 540                 saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
 541                 saun->sin6.sin6_family = AF_INET6;
 542                 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
 543                 if (sa6_recoverscope(&saun->sin6) != 0)
 544                         return (ESRCH);
 545                 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
 546                 break;
 547         }
 548 #endif
 549         default:
 550                 return (ESRCH);
 551         }
 552         return (0);
 553 }
 554
 555 /*ARGSUSED*/
 556 static int
 557 route_output(struct mbuf *m, struct socket *so)
 558 {
 559 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0)
 560         struct rt_msghdr *rtm = NULL;
 561         struct rtentry *rt = NULL;
 562         struct radix_node_head *rnh;
 563         struct rt_addrinfo info;
 564         int len, error = 0;
 565         struct ifnet *ifp = NULL;
 566         union sockaddr_union saun;
 567         sa_family_t saf = AF_UNSPEC;
 568
 569 #define senderr(e) { error = e; goto flush;}
 570         if (m == NULL || ((m->m_len < sizeof(long)) &&
 571                        (m = m_pullup(m, sizeof(long))) == NULL))
 572                 return (ENOBUFS);
 573         if ((m->m_flags & M_PKTHDR) == 0)
 574                 panic("route_output");
 575         len = m->m_pkthdr.len;
 576         if (len < sizeof(*rtm) ||
 577             len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
 578                 info.rti_info[RTAX_DST] = NULL;
 579                 senderr(EINVAL);
 580         }
 581         R_Malloc(rtm, struct rt_msghdr *, len);
 582         if (rtm == NULL) {
 583                 info.rti_info[RTAX_DST] = NULL;
 584                 senderr(ENOBUFS);
 585         }
 586         m_copydata(m, 0, len, (caddr_t)rtm);
 587         if (rtm->rtm_version != RTM_VERSION) {
 588                 info.rti_info[RTAX_DST] = NULL;
 589                 senderr(EPROTONOSUPPORT);
 590         }
 591         rtm->rtm_pid = curproc->p_pid;
 592         bzero(&info, sizeof(info));
 593         info.rti_addrs = rtm->rtm_addrs;
 594         if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
 595                 info.rti_info[RTAX_DST] = NULL;
 596                 senderr(EINVAL);
 597         }
 598         info.rti_flags = rtm->rtm_flags;
 599         if (info.rti_info[RTAX_DST] == NULL ||
 600             info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
 601             (info.rti_info[RTAX_GATEWAY] != NULL &&
 602              info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
 603                 senderr(EINVAL);
 604         saf = info.rti_info[RTAX_DST]->sa_family;
 605         /*
 606          * Verify that the caller has the appropriate privilege; RTM_GET
 607          * is the only operation the non-superuser is allowed.
 608          */
 609         if (rtm->rtm_type != RTM_GET) {
 610                 error = priv_check(curthread, PRIV_NET_ROUTE);
 611                 if (error)
 612                         senderr(error);
 613         }
 614
 615         /*
 616          * The given gateway address may be an interface address.
 617          * For example, issuing a "route change" command on a route
 618          * entry that was created from a tunnel, and the gateway
 619          * address given is the local end point. In this case the
 620          * RTF_GATEWAY flag must be cleared or the destination will
 621          * not be reachable even though there is no error message.
 622          */
 623         if (info.rti_info[RTAX_GATEWAY] != NULL &&
 624             info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
 625                 struct route gw_ro;
 626
 627                 bzero(&gw_ro, sizeof(gw_ro));
 628                 gw_ro.ro_dst = *info.rti_info[RTAX_GATEWAY];
 629                 rtalloc_ign_fib(&gw_ro, 0, so->so_fibnum);
 630                 /*
 631                  * A host route through the loopback interface is
 632                  * installed for each interface adddress. In pre 8.0
 633                  * releases the interface address of a PPP link type
 634                  * is not reachable locally. This behavior is fixed as
 635                  * part of the new L2/L3 redesign and rewrite work. The
 636                  * signature of this interface address route is the
 637                  * AF_LINK sa_family type of the rt_gateway, and the
 638                  * rt_ifp has the IFF_LOOPBACK flag set.
 639                  */
 640                 if (gw_ro.ro_rt != NULL &&
 641                     gw_ro.ro_rt->rt_gateway->sa_family == AF_LINK &&
 642                     gw_ro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)
 643                         info.rti_flags &= ~RTF_GATEWAY;
 644                 if (gw_ro.ro_rt != NULL)
 645                         RTFREE(gw_ro.ro_rt);
 646         }
 647
 648         switch (rtm->rtm_type) {
 649                 struct rtentry *saved_nrt;
 650
 651         case RTM_ADD:
 652                 if (info.rti_info[RTAX_GATEWAY] == NULL)
 653                         senderr(EINVAL);
 654                 saved_nrt = NULL;
 655
 656                 /* support for new ARP code */
 657                 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
 658                     (rtm->rtm_flags & RTF_LLDATA) != 0) {
 659                         error = lla_rt_output(rtm, &info);
 660                         break;
 661                 }
 662                 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt,
 663                     so->so_fibnum);
 664                 if (error == 0 && saved_nrt) {
 665                         RT_LOCK(saved_nrt);
 666                         rt_setmetrics(rtm->rtm_inits,
 667                                 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
 668                         rtm->rtm_index = saved_nrt->rt_ifp->if_index;
 669                         RT_REMREF(saved_nrt);
 670                         RT_UNLOCK(saved_nrt);
 671                 }
 672                 break;
 673
 674         case RTM_DELETE:
 675                 saved_nrt = NULL;
 676                 /* support for new ARP code */
 677                 if (info.rti_info[RTAX_GATEWAY] &&
 678                     (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
 679                     (rtm->rtm_flags & RTF_LLDATA) != 0) {
 680                         error = lla_rt_output(rtm, &info);
 681                         break;
 682                 }
 683                 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt,
 684                     so->so_fibnum);
 685                 if (error == 0) {
 686                         RT_LOCK(saved_nrt);
 687                         rt = saved_nrt;
 688                         goto report;
 689                 }
 690                 break;
 691
 692         case RTM_GET:
 693         case RTM_CHANGE:
 694         case RTM_LOCK:
 695                 rnh = rt_tables_get_rnh(so->so_fibnum,
 696                     info.rti_info[RTAX_DST]->sa_family);
 697                 if (rnh == NULL)
 698                         senderr(EAFNOSUPPORT);
 699
 700                 RADIX_NODE_HEAD_RLOCK(rnh);
 701
 702                 if (info.rti_info[RTAX_NETMASK] == NULL &&
 703                     rtm->rtm_type == RTM_GET) {
 704                         /*
 705                          * Provide logest prefix match for
 706                          * address lookup (no mask).
 707                          * 'route -n get addr'
 708                          */
 709                         rt = (struct rtentry *) rnh->rnh_matchaddr(
 710                             info.rti_info[RTAX_DST], rnh);
 711                 } else
 712                         rt = (struct rtentry *) rnh->rnh_lookup(
 713                             info.rti_info[RTAX_DST],
 714                             info.rti_info[RTAX_NETMASK], rnh);
 715
 716                 if (rt == NULL) {
 717                         RADIX_NODE_HEAD_RUNLOCK(rnh);
 718                         senderr(ESRCH);
 719                 }
 720 #ifdef RADIX_MPATH
 721                 /*
 722                  * for RTM_CHANGE/LOCK, if we got multipath routes,
 723                  * we require users to specify a matching RTAX_GATEWAY.
 724                  *
 725                  * for RTM_GET, gate is optional even with multipath.
 726                  * if gate == NULL the first match is returned.
 727                  * (no need to call rt_mpath_matchgate if gate == NULL)
 728                  */
 729                 if (rn_mpath_capable(rnh) &&
 730                     (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
 731                         rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
 732                         if (!rt) {
 733                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 734                                 senderr(ESRCH);
 735                         }
 736                 }
 737 #endif
 738                 /*
 739                  * If performing proxied L2 entry insertion, and
 740                  * the actual PPP host entry is found, perform
 741                  * another search to retrieve the prefix route of
 742                  * the local end point of the PPP link.
 743                  */
 744                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 745                         struct sockaddr laddr;
 746
 747                         if (rt->rt_ifp != NULL &&
 748                             rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
 749                                 struct ifaddr *ifa;
 750
 751                                 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1);
 752                                 if (ifa != NULL)
 753                                         rt_maskedcopy(ifa->ifa_addr,
 754                                                       &laddr,
 755                                                       ifa->ifa_netmask);
 756                         } else
 757                                 rt_maskedcopy(rt->rt_ifa->ifa_addr,
 758                                               &laddr,
 759                                               rt->rt_ifa->ifa_netmask);
 760                         /*
 761                          * refactor rt and no lock operation necessary
 762                          */
 763                         rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, rnh);
 764                         if (rt == NULL) {
 765                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 766                                 senderr(ESRCH);
 767                         }
 768                 }
 769                 RT_LOCK(rt);
 770                 RT_ADDREF(rt);
 771                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 772
 773                 switch(rtm->rtm_type) {
 774
 775                 case RTM_GET:
 776                 report:
 777                         RT_LOCK_ASSERT(rt);
 778                         if ((rt->rt_flags & RTF_HOST) == 0
 779                             ? jailed_without_vnet(curthread->td_ucred)
 780                             : prison_if(curthread->td_ucred,
 781                             rt_key(rt)) != 0) {
 782                                 RT_UNLOCK(rt);
 783                                 senderr(ESRCH);
 784                         }
 785                         info.rti_info[RTAX_DST] = rt_key(rt);
 786                         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 787                         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
 788                         info.rti_info[RTAX_GENMASK] = 0;
 789                         if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
 790                                 ifp = rt->rt_ifp;
 791                                 if (ifp) {
 792                                         info.rti_info[RTAX_IFP] =
 793                                             ifp->if_addr->ifa_addr;
 794                                         error = rtm_get_jailed(&info, ifp, rt,
 795                                             &saun, curthread->td_ucred);
 796                                         if (error != 0) {
 797                                                 RT_UNLOCK(rt);
 798                                                 senderr(error);
 799                                         }
 800                                         if (ifp->if_flags & IFF_POINTOPOINT)
 801                                                 info.rti_info[RTAX_BRD] =
 802                                                     rt->rt_ifa->ifa_dstaddr;
 803                                         rtm->rtm_index = ifp->if_index;
 804                                 } else {
 805                                         info.rti_info[RTAX_IFP] = NULL;
 806                                         info.rti_info[RTAX_IFA] = NULL;
 807                                 }
 808                         } else if ((ifp = rt->rt_ifp) != NULL) {
 809                                 rtm->rtm_index = ifp->if_index;
 810                         }
 811                         len = rt_msg2(rtm->rtm_type, &info, NULL, NULL);
 812                         if (len > rtm->rtm_msglen) {
 813                                 struct rt_msghdr *new_rtm;
 814                                 R_Malloc(new_rtm, struct rt_msghdr *, len);
 815                                 if (new_rtm == NULL) {
 816                                         RT_UNLOCK(rt);
 817                                         senderr(ENOBUFS);
 818                                 }
 819                                 bcopy(rtm, new_rtm, rtm->rtm_msglen);
 820                                 Free(rtm); rtm = new_rtm;
 821                         }
 822                         (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL);
 823                         rtm->rtm_flags = rt->rt_flags;
 824                         rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
 825                         rtm->rtm_addrs = info.rti_addrs;
 826                         break;
 827
 828                 case RTM_CHANGE:
 829                         /*
 830                          * New gateway could require new ifaddr, ifp;
 831                          * flags may also be different; ifp may be specified
 832                          * by ll sockaddr when protocol address is ambiguous
 833                          */
 834                         if (((rt->rt_flags & RTF_GATEWAY) &&
 835                              info.rti_info[RTAX_GATEWAY] != NULL) ||
 836                             info.rti_info[RTAX_IFP] != NULL ||
 837                             (info.rti_info[RTAX_IFA] != NULL &&
 838                              !sa_equal(info.rti_info[RTAX_IFA],
 839                                        rt->rt_ifa->ifa_addr))) {
 840                                 RT_UNLOCK(rt);
 841                                 RADIX_NODE_HEAD_LOCK(rnh);
 842                                 error = rt_getifa_fib(&info, rt->rt_fibnum);
 843                                 /*
 844                                  * XXXRW: Really we should release this
 845                                  * reference later, but this maintains
 846                                  * historical behavior.
 847                                  */
 848                                 if (info.rti_ifa != NULL)
 849                                         ifa_free(info.rti_ifa);
 850                                 RADIX_NODE_HEAD_UNLOCK(rnh);
 851                                 if (error != 0)
 852                                         senderr(error);
 853                                 RT_LOCK(rt);
 854                         }
 855                         if (info.rti_ifa != NULL &&
 856                             info.rti_ifa != rt->rt_ifa &&
 857                             rt->rt_ifa != NULL &&
 858                             rt->rt_ifa->ifa_rtrequest != NULL) {
 859                                 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt,
 860                                     &info);
 861                                 ifa_free(rt->rt_ifa);
 862                         }
 863                         if (info.rti_info[RTAX_GATEWAY] != NULL) {
 864                                 RT_UNLOCK(rt);
 865                                 RADIX_NODE_HEAD_LOCK(rnh);
 866                                 RT_LOCK(rt);
 867
 868                                 error = rt_setgate(rt, rt_key(rt),
 869                                     info.rti_info[RTAX_GATEWAY]);
 870                                 RADIX_NODE_HEAD_UNLOCK(rnh);
 871                                 if (error != 0) {
 872                                         RT_UNLOCK(rt);
 873                                         senderr(error);
 874                                 }
 875                                 rt->rt_flags |= (RTF_GATEWAY & info.rti_flags);
 876                         }
 877                         if (info.rti_ifa != NULL &&
 878                             info.rti_ifa != rt->rt_ifa) {
 879                                 ifa_ref(info.rti_ifa);
 880                                 rt->rt_ifa = info.rti_ifa;
 881                                 rt->rt_ifp = info.rti_ifp;
 882                         }
 883                         /* Allow some flags to be toggled on change. */
 884                         rt->rt_flags = (rt->rt_flags & ~RTF_FMASK) |
 885                                     (rtm->rtm_flags & RTF_FMASK);
 886                         rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
 887                                         &rt->rt_rmx);
 888                         rtm->rtm_index = rt->rt_ifp->if_index;
 889                         if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
 890                                rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
 891                         /* FALLTHROUGH */
 892                 case RTM_LOCK:
 893                         /* We don't support locks anymore */
 894                         break;
 895                 }
 896                 RT_UNLOCK(rt);
 897                 break;
 898
 899         default:
 900                 senderr(EOPNOTSUPP);
 901         }
 902
 903 flush:
 904         if (rtm) {
 905                 if (error)
 906                         rtm->rtm_errno = error;
 907                 else
 908                         rtm->rtm_flags |= RTF_DONE;
 909         }
 910         if (rt)         /* XXX can this be true? */
 911                 RTFREE(rt);
 912     {
 913         struct rawcb *rp = NULL;
 914         /*
 915          * Check to see if we don't want our own messages.
 916          */
 917         if ((so->so_options & SO_USELOOPBACK) == 0) {
 918                 if (route_cb.any_count <= 1) {
 919                         if (rtm)
 920                                 Free(rtm);
 921                         m_freem(m);
 922                         return (error);
 923                 }
 924                 /* There is another listener, so construct message */
 925                 rp = sotorawcb(so);
 926         }
 927         if (rtm) {
 928                 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
 929                 if (m->m_pkthdr.len < rtm->rtm_msglen) {
 930                         m_freem(m);
 931                         m = NULL;
 932                 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
 933                         m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
 934         }
 935         if (m) {
 936                 M_SETFIB(m, so->so_fibnum);
 937                 m->m_flags |= RTS_FILTER_FIB;
 938                 if (rp) {
 939                         /*
 940                          * XXX insure we don't get a copy by
 941                          * invalidating our protocol
 942                          */
 943                         unsigned short family = rp->rcb_proto.sp_family;
 944                         rp->rcb_proto.sp_family = 0;
 945                         rt_dispatch(m, saf);
 946                         rp->rcb_proto.sp_family = family;
 947                 } else
 948                         rt_dispatch(m, saf);
 949         }
 950         /* info.rti_info[RTAX_DST] (used above) can point inside of rtm */
 951         if (rtm)
 952                 Free(rtm);
 953     }
 954         return (error);
 955 #undef  sa_equal
 956 }
 957
 958 static void
 959 rt_setmetrics(u_long which, const struct rt_metrics *in,
 960         struct rt_metrics_lite *out)
 961 {
 962 #define metric(f, e) if (which & (f)) out->e = in->e;
 963         /*
 964          * Only these are stored in the routing entry since introduction
 965          * of tcp hostcache. The rest is ignored.
 966          */
 967         metric(RTV_MTU, rmx_mtu);
 968         metric(RTV_WEIGHT, rmx_weight);
 969         /* Userland -> kernel timebase conversion. */
 970         if (which & RTV_EXPIRE)
 971                 out->rmx_expire = in->rmx_expire ?
 972                     in->rmx_expire - time_second + time_uptime : 0;
 973 #undef metric
 974 }
 975
 976 static void
 977 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out)
 978 {
 979 #define metric(e) out->e = in->e;
 980         bzero(out, sizeof(*out));
 981         metric(rmx_mtu);
 982         metric(rmx_weight);
 983         /* Kernel -> userland timebase conversion. */
 984         out->rmx_expire = in->rmx_expire ?
 985             in->rmx_expire - time_uptime + time_second : 0;
 986 #undef metric
 987 }
 988
 989 /*
 990  * Extract the addresses of the passed sockaddrs.
 991  * Do a little sanity checking so as to avoid bad memory references.
 992  * This data is derived straight from userland.
 993  */
 994 static int
 995 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
 996 {
 997         struct sockaddr *sa;
 998         int i;
 999
1000         for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
1001                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
1002                         continue;
1003                 sa = (struct sockaddr *)cp;
1004                 /*
1005                  * It won't fit.
1006                  */
1007                 if (cp + sa->sa_len > cplim)
1008                         return (EINVAL);
1009                 /*
1010                  * there are no more.. quit now
1011                  * If there are more bits, they are in error.
1012                  * I've seen this. route(1) can evidently generate these.
1013                  * This causes kernel to core dump.
1014                  * for compatibility, If we see this, point to a safe address.
1015                  */
1016                 if (sa->sa_len == 0) {
1017                         rtinfo->rti_info[i] = &sa_zero;
1018                         return (0); /* should be EINVAL but for compat */
1019                 }
1020                 /* accept it */
1021                 rtinfo->rti_info[i] = sa;
1022                 cp += SA_SIZE(sa);
1023         }
1024         return (0);
1025 }
1026
1027 /*
1028  * Used by the routing socket.
1029  */
1030 static struct mbuf *
1031 rt_msg1(int type, struct rt_addrinfo *rtinfo)
1032 {
1033         struct rt_msghdr *rtm;
1034         struct mbuf *m;
1035         int i;
1036         struct sockaddr *sa;
1037         int len, dlen;
1038
1039         switch (type) {
1040
1041         case RTM_DELADDR:
1042         case RTM_NEWADDR:
1043                 len = sizeof(struct ifa_msghdr);
1044                 break;
1045
1046         case RTM_DELMADDR:
1047         case RTM_NEWMADDR:
1048                 len = sizeof(struct ifma_msghdr);
1049                 break;
1050
1051         case RTM_IFINFO:
1052                 len = sizeof(struct if_msghdr);
1053                 break;
1054
1055         case RTM_IFANNOUNCE:
1056         case RTM_IEEE80211:
1057                 len = sizeof(struct if_announcemsghdr);
1058                 break;
1059
1060         default:
1061                 len = sizeof(struct rt_msghdr);
1062         }
1063         if (len > MCLBYTES)
1064                 panic("rt_msg1");
1065         m = m_gethdr(M_DONTWAIT, MT_DATA);
1066         if (m && len > MHLEN) {
1067                 MCLGET(m, M_DONTWAIT);
1068                 if ((m->m_flags & M_EXT) == 0) {
1069                         m_free(m);
1070                         m = NULL;
1071                 }
1072         }
1073         if (m == NULL)
1074                 return (m);
1075         m->m_pkthdr.len = m->m_len = len;
1076         m->m_pkthdr.rcvif = NULL;
1077         rtm = mtod(m, struct rt_msghdr *);
1078         bzero((caddr_t)rtm, len);
1079         for (i = 0; i < RTAX_MAX; i++) {
1080                 if ((sa = rtinfo->rti_info[i]) == NULL)
1081                         continue;
1082                 rtinfo->rti_addrs |= (1 << i);
1083                 dlen = SA_SIZE(sa);
1084                 m_copyback(m, len, dlen, (caddr_t)sa);
1085                 len += dlen;
1086         }
1087         if (m->m_pkthdr.len != len) {
1088                 m_freem(m);
1089                 return (NULL);
1090         }
1091         rtm->rtm_msglen = len;
1092         rtm->rtm_version = RTM_VERSION;
1093         rtm->rtm_type = type;
1094         return (m);
1095 }
1096
1097 /*
1098  * Used by the sysctl code and routing socket.
1099  */
1100 static int
1101 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
1102 {
1103         int i;
1104         int len, dlen, second_time = 0;
1105         caddr_t cp0;
1106
1107         rtinfo->rti_addrs = 0;
1108 again:
1109         switch (type) {
1110
1111         case RTM_DELADDR:
1112         case RTM_NEWADDR:
1113                 if (w != NULL && w->w_op == NET_RT_IFLISTL) {
1114 #ifdef COMPAT_FREEBSD32
1115                         if (w->w_req->flags & SCTL_MASK32)
1116                                 len = sizeof(struct ifa_msghdrl32);
1117                         else
1118 #endif
1119                                 len = sizeof(struct ifa_msghdrl);
1120                 } else
1121                         len = sizeof(struct ifa_msghdr);
1122                 break;
1123
1124         case RTM_IFINFO:
1125 #ifdef COMPAT_FREEBSD32
1126                 if (w != NULL && w->w_req->flags & SCTL_MASK32) {
1127                         if (w->w_op == NET_RT_IFLISTL)
1128                                 len = sizeof(struct if_msghdrl32);
1129                         else
1130                                 len = sizeof(struct if_msghdr32);
1131                         break;
1132                 }
1133 #endif
1134                 if (w != NULL && w->w_op == NET_RT_IFLISTL)
1135                         len = sizeof(struct if_msghdrl);
1136                 else
1137                         len = sizeof(struct if_msghdr);
1138                 break;
1139
1140         case RTM_NEWMADDR:
1141                 len = sizeof(struct ifma_msghdr);
1142                 break;
1143
1144         default:
1145                 len = sizeof(struct rt_msghdr);
1146         }
1147         cp0 = cp;
1148         if (cp0)
1149                 cp += len;
1150         for (i = 0; i < RTAX_MAX; i++) {
1151                 struct sockaddr *sa;
1152
1153                 if ((sa = rtinfo->rti_info[i]) == NULL)
1154                         continue;
1155                 rtinfo->rti_addrs |= (1 << i);
1156                 dlen = SA_SIZE(sa);
1157                 if (cp) {
1158                         bcopy((caddr_t)sa, cp, (unsigned)dlen);
1159                         cp += dlen;
1160                 }
1161                 len += dlen;
1162         }
1163         len = ALIGN(len);
1164         if (cp == NULL && w != NULL && !second_time) {
1165                 struct walkarg *rw = w;
1166
1167                 if (rw->w_req) {
1168                         if (rw->w_tmemsize < len) {
1169                                 if (rw->w_tmem)
1170                                         free(rw->w_tmem, M_RTABLE);
1171                                 rw->w_tmem = (caddr_t)
1172                                         malloc(len, M_RTABLE, M_NOWAIT);
1173                                 if (rw->w_tmem)
1174                                         rw->w_tmemsize = len;
1175                         }
1176                         if (rw->w_tmem) {
1177                                 cp = rw->w_tmem;
1178                                 second_time = 1;
1179                                 goto again;
1180                         }
1181                 }
1182         }
1183         if (cp) {
1184                 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
1185
1186                 rtm->rtm_version = RTM_VERSION;
1187                 rtm->rtm_type = type;
1188                 rtm->rtm_msglen = len;
1189         }
1190         return (len);
1191 }
1192
1193 /*
1194  * This routine is called to generate a message from the routing
1195  * socket indicating that a redirect has occured, a routing lookup
1196  * has failed, or that a protocol has detected timeouts to a particular
1197  * destination.
1198  */
1199 void
1200 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error,
1201     int fibnum)
1202 {
1203         struct rt_msghdr *rtm;
1204         struct mbuf *m;
1205         struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
1206
1207         if (route_cb.any_count == 0)
1208                 return;
1209         m = rt_msg1(type, rtinfo);
1210         if (m == NULL)
1211                 return;
1212
1213         if (fibnum != RT_ALL_FIBS) {
1214                 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
1215                     "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
1216                 M_SETFIB(m, fibnum);
1217                 m->m_flags |= RTS_FILTER_FIB;
1218         }
1219
1220         rtm = mtod(m, struct rt_msghdr *);
1221         rtm->rtm_flags = RTF_DONE | flags;
1222         rtm->rtm_errno = error;
1223         rtm->rtm_addrs = rtinfo->rti_addrs;
1224         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1225 }
1226
1227 void
1228 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
1229 {
1230
1231         rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS);
1232 }
1233
1234 /*
1235  * This routine is called to generate a message from the routing
1236  * socket indicating that the status of a network interface has changed.
1237  */
1238 void
1239 rt_ifmsg(struct ifnet *ifp)
1240 {
1241         struct if_msghdr *ifm;
1242         struct mbuf *m;
1243         struct rt_addrinfo info;
1244
1245         if (route_cb.any_count == 0)
1246                 return;
1247         bzero((caddr_t)&info, sizeof(info));
1248         m = rt_msg1(RTM_IFINFO, &info);
1249         if (m == NULL)
1250                 return;
1251         ifm = mtod(m, struct if_msghdr *);
1252         ifm->ifm_index = ifp->if_index;
1253         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1254         ifm->ifm_data = ifp->if_data;
1255         ifm->ifm_addrs = 0;
1256         rt_dispatch(m, AF_UNSPEC);
1257 }
1258
1259 /*
1260  * Announce interface address arrival/withdraw.
1261  * Please do not call directly, use rt_addrmsg().
1262  * Assume input data to be valid.
1263  * Returns 0 on success.
1264  */
1265 int
1266 rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
1267 {
1268         struct rt_addrinfo info;
1269         struct sockaddr *sa;
1270         int ncmd;
1271         struct mbuf *m;
1272         struct ifa_msghdr *ifam;
1273         struct ifnet *ifp = ifa->ifa_ifp;
1274
1275         if (route_cb.any_count == 0)
1276                 return (0);
1277
1278         ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
1279
1280         bzero((caddr_t)&info, sizeof(info));
1281         info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
1282         info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
1283         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1284         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1285         if ((m = rt_msg1(ncmd, &info)) == NULL)
1286                 return (ENOBUFS);
1287         ifam = mtod(m, struct ifa_msghdr *);
1288         ifam->ifam_index = ifp->if_index;
1289         ifam->ifam_metric = ifa->ifa_metric;
1290         ifam->ifam_flags = ifa->ifa_flags;
1291         ifam->ifam_addrs = info.rti_addrs;
1292
1293         if (fibnum != RT_ALL_FIBS) {
1294                 M_SETFIB(m, fibnum);
1295                 m->m_flags |= RTS_FILTER_FIB;
1296         }
1297
1298         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1299
1300         return (0);
1301 }
1302
1303 /*
1304  * Announce route addition/removal.
1305  * Please do not call directly, use rt_routemsg().
1306  * Note that @rt data MAY be inconsistent/invalid:
1307  * if some userland app sends us "invalid" route message (invalid mask,
1308  * no dst, wrong address families, etc...) we need to pass it back
1309  * to app (and any other rtsock consumers) with rtm_errno field set to
1310  * non-zero value.
1311  *
1312  * Returns 0 on success.
1313  */
1314 int
1315 rtsock_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt,
1316     int fibnum)
1317 {
1318         struct rt_addrinfo info;
1319         struct sockaddr *sa;
1320         struct mbuf *m;
1321         struct rt_msghdr *rtm;
1322
1323         if (route_cb.any_count == 0)
1324                 return (0);
1325
1326         bzero((caddr_t)&info, sizeof(info));
1327         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1328         info.rti_info[RTAX_DST] = sa = rt_key(rt);
1329         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1330         if ((m = rt_msg1(cmd, &info)) == NULL)
1331                 return (ENOBUFS);
1332         rtm = mtod(m, struct rt_msghdr *);
1333         rtm->rtm_index = ifp->if_index;
1334         rtm->rtm_flags |= rt->rt_flags;
1335         rtm->rtm_errno = error;
1336         rtm->rtm_addrs = info.rti_addrs;
1337
1338         if (fibnum != RT_ALL_FIBS) {
1339                 M_SETFIB(m, fibnum);
1340                 m->m_flags |= RTS_FILTER_FIB;
1341         }
1342
1343         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1344
1345         return (0);
1346 }
1347
1348 /*
1349  * This is the analogue to the rt_newaddrmsg which performs the same
1350  * function but for multicast group memberhips.  This is easier since
1351  * there is no route state to worry about.
1352  */
1353 void
1354 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1355 {
1356         struct rt_addrinfo info;
1357         struct mbuf *m = NULL;
1358         struct ifnet *ifp = ifma->ifma_ifp;
1359         struct ifma_msghdr *ifmam;
1360
1361         if (route_cb.any_count == 0)
1362                 return;
1363
1364         bzero((caddr_t)&info, sizeof(info));
1365         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1366         info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
1367         /*
1368          * If a link-layer address is present, present it as a ``gateway''
1369          * (similarly to how ARP entries, e.g., are presented).
1370          */
1371         info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
1372         m = rt_msg1(cmd, &info);
1373         if (m == NULL)
1374                 return;
1375         ifmam = mtod(m, struct ifma_msghdr *);
1376         KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
1377             __func__));
1378         ifmam->ifmam_index = ifp->if_index;
1379         ifmam->ifmam_addrs = info.rti_addrs;
1380         rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC);
1381 }
1382
1383 static struct mbuf *
1384 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1385         struct rt_addrinfo *info)
1386 {
1387         struct if_announcemsghdr *ifan;
1388         struct mbuf *m;
1389
1390         if (route_cb.any_count == 0)
1391                 return NULL;
1392         bzero((caddr_t)info, sizeof(*info));
1393         m = rt_msg1(type, info);
1394         if (m != NULL) {
1395                 ifan = mtod(m, struct if_announcemsghdr *);
1396                 ifan->ifan_index = ifp->if_index;
1397                 strlcpy(ifan->ifan_name, ifp->if_xname,
1398                         sizeof(ifan->ifan_name));
1399                 ifan->ifan_what = what;
1400         }
1401         return m;
1402 }
1403
1404 /*
1405  * This is called to generate routing socket messages indicating
1406  * IEEE80211 wireless events.
1407  * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1408  */
1409 void
1410 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1411 {
1412         struct mbuf *m;
1413         struct rt_addrinfo info;
1414
1415         m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1416         if (m != NULL) {
1417                 /*
1418                  * Append the ieee80211 data.  Try to stick it in the
1419                  * mbuf containing the ifannounce msg; otherwise allocate
1420                  * a new mbuf and append.
1421                  *
1422                  * NB: we assume m is a single mbuf.
1423                  */
1424                 if (data_len > M_TRAILINGSPACE(m)) {
1425                         struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
1426                         if (n == NULL) {
1427                                 m_freem(m);
1428                                 return;
1429                         }
1430                         bcopy(data, mtod(n, void *), data_len);
1431                         n->m_len = data_len;
1432                         m->m_next = n;
1433                 } else if (data_len > 0) {
1434                         bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1435                         m->m_len += data_len;
1436                 }
1437                 if (m->m_flags & M_PKTHDR)
1438                         m->m_pkthdr.len += data_len;
1439                 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1440                 rt_dispatch(m, AF_UNSPEC);
1441         }
1442 }
1443
1444 /*
1445  * This is called to generate routing socket messages indicating
1446  * network interface arrival and departure.
1447  */
1448 void
1449 rt_ifannouncemsg(struct ifnet *ifp, int what)
1450 {
1451         struct mbuf *m;
1452         struct rt_addrinfo info;
1453
1454         m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
1455         if (m != NULL)
1456                 rt_dispatch(m, AF_UNSPEC);
1457 }
1458
1459 static void
1460 rt_dispatch(struct mbuf *m, sa_family_t saf)
1461 {
1462         struct m_tag *tag;
1463
1464         /*
1465          * Preserve the family from the sockaddr, if any, in an m_tag for
1466          * use when injecting the mbuf into the routing socket buffer from
1467          * the netisr.
1468          */
1469         if (saf != AF_UNSPEC) {
1470                 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
1471                     M_NOWAIT);
1472                 if (tag == NULL) {
1473                         m_freem(m);
1474                         return;
1475                 }
1476                 *(unsigned short *)(tag + 1) = saf;
1477                 m_tag_prepend(m, tag);
1478         }
1479 #ifdef VIMAGE
1480         if (V_loif)
1481                 m->m_pkthdr.rcvif = V_loif;
1482         else {
1483                 m_freem(m);
1484                 return;
1485         }
1486 #endif
1487         netisr_queue(NETISR_ROUTE, m);  /* mbuf is free'd on failure. */
1488 }
1489
1490 /*
1491  * This is used in dumping the kernel table via sysctl().
1492  */
1493 static int
1494 sysctl_dumpentry(struct radix_node *rn, void *vw)
1495 {
1496         struct walkarg *w = vw;
1497         struct rtentry *rt = (struct rtentry *)rn;
1498         int error = 0, size;
1499         struct rt_addrinfo info;
1500
1501         if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1502                 return 0;
1503         if ((rt->rt_flags & RTF_HOST) == 0
1504             ? jailed_without_vnet(w->w_req->td->td_ucred)
1505             : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0)
1506                 return (0);
1507         bzero((caddr_t)&info, sizeof(info));
1508         info.rti_info[RTAX_DST] = rt_key(rt);
1509         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1510         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1511         info.rti_info[RTAX_GENMASK] = 0;
1512         if (rt->rt_ifp) {
1513                 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
1514                 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
1515                 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1516                         info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
1517         }
1518         size = rt_msg2(RTM_GET, &info, NULL, w);
1519         if (w->w_req && w->w_tmem) {
1520                 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1521
1522                 rtm->rtm_flags = rt->rt_flags;
1523                 /*
1524                  * let's be honest about this being a retarded hack
1525                  */
1526                 rtm->rtm_fmask = rt->rt_rmx.rmx_pksent;
1527                 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
1528                 rtm->rtm_index = rt->rt_ifp->if_index;
1529                 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1530                 rtm->rtm_addrs = info.rti_addrs;
1531                 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1532                 return (error);
1533         }
1534         return (error);
1535 }
1536
1537 #ifdef COMPAT_FREEBSD32
1538 static void
1539 copy_ifdata32(struct if_data *src, struct if_data32 *dst)
1540 {
1541
1542         bzero(dst, sizeof(*dst));
1543         CP(*src, *dst, ifi_type);
1544         CP(*src, *dst, ifi_physical);
1545         CP(*src, *dst, ifi_addrlen);
1546         CP(*src, *dst, ifi_hdrlen);
1547         CP(*src, *dst, ifi_link_state);
1548         dst->ifi_datalen = sizeof(struct if_data32);
1549         CP(*src, *dst, ifi_mtu);
1550         CP(*src, *dst, ifi_metric);
1551         CP(*src, *dst, ifi_baudrate);
1552         CP(*src, *dst, ifi_ipackets);
1553         CP(*src, *dst, ifi_ierrors);
1554         CP(*src, *dst, ifi_opackets);
1555         CP(*src, *dst, ifi_oerrors);
1556         CP(*src, *dst, ifi_collisions);
1557         CP(*src, *dst, ifi_ibytes);
1558         CP(*src, *dst, ifi_obytes);
1559         CP(*src, *dst, ifi_imcasts);
1560         CP(*src, *dst, ifi_omcasts);
1561         CP(*src, *dst, ifi_iqdrops);
1562         CP(*src, *dst, ifi_noproto);
1563         CP(*src, *dst, ifi_hwassist);
1564         CP(*src, *dst, ifi_epoch);
1565         TV_CP(*src, *dst, ifi_lastchange);
1566 }
1567 #endif
1568
1569 static int
1570 sysctl_iflist_ifml(struct ifnet *ifp, struct rt_addrinfo *info,
1571     struct walkarg *w, int len)
1572 {
1573         struct if_msghdrl *ifm;
1574
1575 #ifdef COMPAT_FREEBSD32
1576         if (w->w_req->flags & SCTL_MASK32) {
1577                 struct if_msghdrl32 *ifm32;
1578
1579                 ifm32 = (struct if_msghdrl32 *)w->w_tmem;
1580                 ifm32->ifm_addrs = info->rti_addrs;
1581                 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1582                 ifm32->ifm_index = ifp->if_index;
1583                 ifm32->_ifm_spare1 = 0;
1584                 ifm32->ifm_len = sizeof(*ifm32);
1585                 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data);
1586
1587                 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1588
1589                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1590         }
1591 #endif
1592         ifm = (struct if_msghdrl *)w->w_tmem;
1593         ifm->ifm_addrs = info->rti_addrs;
1594         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1595         ifm->ifm_index = ifp->if_index;
1596         ifm->_ifm_spare1 = 0;
1597         ifm->ifm_len = sizeof(*ifm);
1598         ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data);
1599
1600         ifm->ifm_data = ifp->if_data;
1601
1602         return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1603 }
1604
1605 static int
1606 sysctl_iflist_ifm(struct ifnet *ifp, struct rt_addrinfo *info,
1607     struct walkarg *w, int len)
1608 {
1609         struct if_msghdr *ifm;
1610
1611 #ifdef COMPAT_FREEBSD32
1612         if (w->w_req->flags & SCTL_MASK32) {
1613                 struct if_msghdr32 *ifm32;
1614
1615                 ifm32 = (struct if_msghdr32 *)w->w_tmem;
1616                 ifm32->ifm_addrs = info->rti_addrs;
1617                 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1618                 ifm32->ifm_index = ifp->if_index;
1619
1620                 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1621
1622                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1623         }
1624 #endif
1625         ifm = (struct if_msghdr *)w->w_tmem;
1626         ifm->ifm_addrs = info->rti_addrs;
1627         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1628         ifm->ifm_index = ifp->if_index;
1629
1630         ifm->ifm_data = ifp->if_data;
1631
1632         return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1633 }
1634
1635 static int
1636 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info,
1637     struct walkarg *w, int len)
1638 {
1639         struct ifa_msghdrl *ifam;
1640
1641 #ifdef COMPAT_FREEBSD32
1642         if (w->w_req->flags & SCTL_MASK32) {
1643                 struct ifa_msghdrl32 *ifam32;
1644
1645                 ifam32 = (struct ifa_msghdrl32 *)w->w_tmem;
1646                 ifam32->ifam_addrs = info->rti_addrs;
1647                 ifam32->ifam_flags = ifa->ifa_flags;
1648                 ifam32->ifam_index = ifa->ifa_ifp->if_index;
1649                 ifam32->_ifam_spare1 = 0;
1650                 ifam32->ifam_len = sizeof(*ifam32);
1651                 ifam32->ifam_data_off =
1652                     offsetof(struct ifa_msghdrl32, ifam_data);
1653                 ifam32->ifam_metric = ifa->ifa_metric;
1654
1655                 copy_ifdata32(&ifa->ifa_ifp->if_data, &ifam32->ifam_data);
1656
1657                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifam32, len));
1658         }
1659 #endif
1660
1661         ifam = (struct ifa_msghdrl *)w->w_tmem;
1662         ifam->ifam_addrs = info->rti_addrs;
1663         ifam->ifam_flags = ifa->ifa_flags;
1664         ifam->ifam_index = ifa->ifa_ifp->if_index;
1665         ifam->_ifam_spare1 = 0;
1666         ifam->ifam_len = sizeof(*ifam);
1667         ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data);
1668         ifam->ifam_metric = ifa->ifa_metric;
1669
1670         ifam->ifam_data = ifa->if_data;
1671
1672         return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1673 }
1674
1675 static int
1676 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info,
1677     struct walkarg *w, int len)
1678 {
1679         struct ifa_msghdr *ifam;
1680
1681         ifam = (struct ifa_msghdr *)w->w_tmem;
1682         ifam->ifam_addrs = info->rti_addrs;
1683         ifam->ifam_flags = ifa->ifa_flags;
1684         ifam->ifam_index = ifa->ifa_ifp->if_index;
1685         ifam->ifam_metric = ifa->ifa_metric;
1686
1687         return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1688 }
1689
1690 static int
1691 sysctl_iflist(int af, struct walkarg *w)
1692 {
1693         struct ifnet *ifp;
1694         struct ifaddr *ifa;
1695         struct rt_addrinfo info;
1696         int len, error = 0;
1697
1698         bzero((caddr_t)&info, sizeof(info));
1699         IFNET_RLOCK();
1700         TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1701                 if (w->w_arg && w->w_arg != ifp->if_index)
1702                         continue;
1703                 IF_ADDR_RLOCK(ifp);
1704                 ifa = ifp->if_addr;
1705                 info.rti_info[RTAX_IFP] = ifa->ifa_addr;
1706                 len = rt_msg2(RTM_IFINFO, &info, NULL, w);
1707                 info.rti_info[RTAX_IFP] = NULL;
1708                 if (w->w_req && w->w_tmem) {
1709                         if (w->w_op == NET_RT_IFLISTL)
1710                                 error = sysctl_iflist_ifml(ifp, &info, w, len);
1711                         else
1712                                 error = sysctl_iflist_ifm(ifp, &info, w, len);
1713                         if (error)
1714                                 goto done;
1715                 }
1716                 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1717                         if (af && af != ifa->ifa_addr->sa_family)
1718                                 continue;
1719                         if (prison_if(w->w_req->td->td_ucred,
1720                             ifa->ifa_addr) != 0)
1721                                 continue;
1722                         info.rti_info[RTAX_IFA] = ifa->ifa_addr;
1723                         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1724                         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1725                         len = rt_msg2(RTM_NEWADDR, &info, NULL, w);
1726                         if (w->w_req && w->w_tmem) {
1727                                 if (w->w_op == NET_RT_IFLISTL)
1728                                         error = sysctl_iflist_ifaml(ifa, &info,
1729                                             w, len);
1730                                 else
1731                                         error = sysctl_iflist_ifam(ifa, &info,
1732                                             w, len);
1733                                 if (error)
1734                                         goto done;
1735                         }
1736                 }
1737                 IF_ADDR_RUNLOCK(ifp);
1738                 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] =
1739                         info.rti_info[RTAX_BRD] = NULL;
1740         }
1741 done:
1742         if (ifp != NULL)
1743                 IF_ADDR_RUNLOCK(ifp);
1744         IFNET_RUNLOCK();
1745         return (error);
1746 }
1747
1748 static int
1749 sysctl_ifmalist(int af, struct walkarg *w)
1750 {
1751         struct ifnet *ifp;
1752         struct ifmultiaddr *ifma;
1753         struct  rt_addrinfo info;
1754         int     len, error = 0;
1755         struct ifaddr *ifa;
1756
1757         bzero((caddr_t)&info, sizeof(info));
1758         IFNET_RLOCK();
1759         TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1760                 if (w->w_arg && w->w_arg != ifp->if_index)
1761                         continue;
1762                 ifa = ifp->if_addr;
1763                 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
1764                 IF_ADDR_RLOCK(ifp);
1765                 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1766                         if (af && af != ifma->ifma_addr->sa_family)
1767                                 continue;
1768                         if (prison_if(w->w_req->td->td_ucred,
1769                             ifma->ifma_addr) != 0)
1770                                 continue;
1771                         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1772                         info.rti_info[RTAX_GATEWAY] =
1773                             (ifma->ifma_addr->sa_family != AF_LINK) ?
1774                             ifma->ifma_lladdr : NULL;
1775                         len = rt_msg2(RTM_NEWMADDR, &info, NULL, w);
1776                         if (w->w_req && w->w_tmem) {
1777                                 struct ifma_msghdr *ifmam;
1778
1779                                 ifmam = (struct ifma_msghdr *)w->w_tmem;
1780                                 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1781                                 ifmam->ifmam_flags = 0;
1782                                 ifmam->ifmam_addrs = info.rti_addrs;
1783                                 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1784                                 if (error) {
1785                                         IF_ADDR_RUNLOCK(ifp);
1786                                         goto done;
1787                                 }
1788                         }
1789                 }
1790                 IF_ADDR_RUNLOCK(ifp);
1791         }
1792 done:
1793         IFNET_RUNLOCK();
1794         return (error);
1795 }
1796
1797 static int
1798 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1799 {
1800         int     *name = (int *)arg1;
1801         u_int   namelen = arg2;
1802         struct radix_node_head *rnh = NULL; /* silence compiler. */
1803         int     i, lim, error = EINVAL;
1804         int     fib = 0;
1805         u_char  af;
1806         struct  walkarg w;
1807
1808         name ++;
1809         namelen--;
1810         if (req->newptr)
1811                 return (EPERM);
1812         if (name[1] == NET_RT_DUMP) {
1813                 if (namelen == 3)
1814                         fib = req->td->td_proc->p_fibnum;
1815                 else if (namelen == 4)
1816                         fib = (name[3] == RT_ALL_FIBS) ?
1817                             req->td->td_proc->p_fibnum : name[3];
1818                 else
1819                         return ((namelen < 3) ? EISDIR : ENOTDIR);
1820                 if (fib < 0 || fib >= rt_numfibs)
1821                         return (EINVAL);
1822         } else if (namelen != 3)
1823                 return ((namelen < 3) ? EISDIR : ENOTDIR);
1824         af = name[0];
1825         if (af > AF_MAX)
1826                 return (EINVAL);
1827         bzero(&w, sizeof(w));
1828         w.w_op = name[1];
1829         w.w_arg = name[2];
1830         w.w_req = req;
1831
1832         error = sysctl_wire_old_buffer(req, 0);
1833         if (error)
1834                 return (error);
1835         switch (w.w_op) {
1836
1837         case NET_RT_DUMP:
1838         case NET_RT_FLAGS:
1839                 if (af == 0) {                  /* dump all tables */
1840                         i = 1;
1841                         lim = AF_MAX;
1842                 } else                          /* dump only one table */
1843                         i = lim = af;
1844
1845                 /*
1846                  * take care of llinfo entries, the caller must
1847                  * specify an AF
1848                  */
1849                 if (w.w_op == NET_RT_FLAGS &&
1850                     (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) {
1851                         if (af != 0)
1852                                 error = lltable_sysctl_dumparp(af, w.w_req);
1853                         else
1854                                 error = EINVAL;
1855                         break;
1856                 }
1857                 /*
1858                  * take care of routing entries
1859                  */
1860                 for (error = 0; error == 0 && i <= lim; i++) {
1861                         rnh = rt_tables_get_rnh(fib, i);
1862                         if (rnh != NULL) {
1863                                 RADIX_NODE_HEAD_RLOCK(rnh);
1864                                 error = rnh->rnh_walktree(rnh,
1865                                     sysctl_dumpentry, &w);
1866                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
1867                         } else if (af != 0)
1868                                 error = EAFNOSUPPORT;
1869                 }
1870                 break;
1871
1872         case NET_RT_IFLIST:
1873         case NET_RT_IFLISTL:
1874                 error = sysctl_iflist(af, &w);
1875                 break;
1876
1877         case NET_RT_IFMALIST:
1878                 error = sysctl_ifmalist(af, &w);
1879                 break;
1880         }
1881         if (w.w_tmem)
1882                 free(w.w_tmem, M_RTABLE);
1883         return (error);
1884 }
1885
1886 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1887
1888 /*
1889  * Definitions of protocols supported in the ROUTE domain.
1890  */
1891
1892 static struct domain routedomain;               /* or at least forward */
1893
1894 static struct protosw routesw[] = {
1895 {
1896         .pr_type =              SOCK_RAW,
1897         .pr_domain =            &routedomain,
1898         .pr_flags =             PR_ATOMIC|PR_ADDR,
1899         .pr_output =            route_output,
1900         .pr_ctlinput =          raw_ctlinput,
1901         .pr_init =              raw_init,
1902         .pr_usrreqs =           &route_usrreqs
1903 }
1904 };
1905
1906 static struct domain routedomain = {
1907         .dom_family =           PF_ROUTE,
1908         .dom_name =              "route",
1909         .dom_protosw =          routesw,
1910         .dom_protoswNPROTOSW =  &routesw[sizeof(routesw)/sizeof(routesw[0])]
1911 };
1912
1913 VNET_DOMAIN_SET(route);