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