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_data32 {
  77         uint8_t ifi_type;
  78         uint8_t ifi_physical;
  79         uint8_t ifi_addrlen;
  80         uint8_t ifi_hdrlen;
  81         uint8_t ifi_link_state;
  82         uint8_t ifi_vhid;
  83         uint8_t ifi_baudrate_pf;
  84         uint8_t ifi_datalen;
  85         uint32_t ifi_mtu;
  86         uint32_t ifi_metric;
  87         uint32_t ifi_baudrate;
  88         uint32_t ifi_ipackets;
  89         uint32_t ifi_ierrors;
  90         uint32_t ifi_opackets;
  91         uint32_t ifi_oerrors;
  92         uint32_t ifi_collisions;
  93         uint32_t ifi_ibytes;
  94         uint32_t ifi_obytes;
  95         uint32_t ifi_imcasts;
  96         uint32_t ifi_omcasts;
  97         uint32_t ifi_iqdrops;
  98         uint32_t ifi_noproto;
  99         uint32_t ifi_hwassist;
 100         int32_t ifi_epoch;
 101         struct  timeval32 ifi_lastchange;
 102 };
 103
 104 struct if_msghdr32 {
 105         uint16_t ifm_msglen;
 106         uint8_t ifm_version;
 107         uint8_t ifm_type;
 108         int32_t ifm_addrs;
 109         int32_t ifm_flags;
 110         uint16_t ifm_index;
 111         struct  if_data32 ifm_data;
 112 };
 113
 114 struct if_msghdrl32 {
 115         uint16_t ifm_msglen;
 116         uint8_t ifm_version;
 117         uint8_t ifm_type;
 118         int32_t ifm_addrs;
 119         int32_t ifm_flags;
 120         uint16_t ifm_index;
 121         uint16_t _ifm_spare1;
 122         uint16_t ifm_len;
 123         uint16_t ifm_data_off;
 124         struct  if_data32 ifm_data;
 125 };
 126
 127 struct ifa_msghdrl32 {
 128         uint16_t ifam_msglen;
 129         uint8_t ifam_version;
 130         uint8_t ifam_type;
 131         int32_t ifam_addrs;
 132         int32_t ifam_flags;
 133         uint16_t ifam_index;
 134         uint16_t _ifam_spare1;
 135         uint16_t ifam_len;
 136         uint16_t ifam_data_off;
 137         int32_t ifam_metric;
 138         struct  if_data32 ifam_data;
 139 };
 140 #endif /* COMPAT_FREEBSD32 */
 141
 142 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
 143
 144 /* NB: these are not modified */
 145 static struct   sockaddr route_src = { 2, PF_ROUTE, };
 146 static struct   sockaddr sa_zero   = { sizeof(sa_zero), AF_INET, };
 147
 148 /* These are external hooks for CARP. */
 149 int     (*carp_get_vhid_p)(struct ifaddr *);
 150
 151 /*
 152  * Used by rtsock/raw_input callback code to decide whether to filter the update
 153  * notification to a socket bound to a particular FIB.
 154  */
 155 #define RTS_FILTER_FIB  M_PROTO8
 156
 157 typedef struct {
 158         int     ip_count;       /* attached w/ AF_INET */
 159         int     ip6_count;      /* attached w/ AF_INET6 */
 160         int     ipx_count;      /* attached w/ AF_IPX */
 161         int     any_count;      /* total attached */
 162 } route_cb_t;
 163 static VNET_DEFINE(route_cb_t, route_cb);
 164 #define V_route_cb VNET(route_cb)
 165
 166 struct mtx rtsock_mtx;
 167 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
 168
 169 #define RTSOCK_LOCK()   mtx_lock(&rtsock_mtx)
 170 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
 171 #define RTSOCK_LOCK_ASSERT()    mtx_assert(&rtsock_mtx, MA_OWNED)
 172
 173 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
 174
 175 struct walkarg {
 176         int     w_tmemsize;
 177         int     w_op, w_arg;
 178         caddr_t w_tmem;
 179         struct sysctl_req *w_req;
 180 };
 181
 182 static void     rts_input(struct mbuf *m);
 183 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo);
 184 static int      rt_msg2(int type, struct rt_addrinfo *rtinfo,
 185                         caddr_t cp, struct walkarg *w);
 186 static int      rt_xaddrs(caddr_t cp, caddr_t cplim,
 187                         struct rt_addrinfo *rtinfo);
 188 static int      sysctl_dumpentry(struct radix_node *rn, void *vw);
 189 static int      sysctl_iflist(int af, struct walkarg *w);
 190 static int      sysctl_ifmalist(int af, struct walkarg *w);
 191 static int      route_output(struct mbuf *m, struct socket *so);
 192 static void     rt_setmetrics(u_long which, const struct rt_metrics *in,
 193                         struct rt_metrics_lite *out);
 194 static void     rt_getmetrics(const struct rt_metrics_lite *in,
 195                         struct rt_metrics *out);
 196 static void     rt_dispatch(struct mbuf *, sa_family_t);
 197
 198 static struct netisr_handler rtsock_nh = {
 199         .nh_name = "rtsock",
 200         .nh_handler = rts_input,
 201         .nh_proto = NETISR_ROUTE,
 202         .nh_policy = NETISR_POLICY_SOURCE,
 203 };
 204
 205 static int
 206 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)
 207 {
 208         int error, qlimit;
 209
 210         netisr_getqlimit(&rtsock_nh, &qlimit);
 211         error = sysctl_handle_int(oidp, &qlimit, 0, req);
 212         if (error || !req->newptr)
 213                 return (error);
 214         if (qlimit < 1)
 215                 return (EINVAL);
 216         return (netisr_setqlimit(&rtsock_nh, qlimit));
 217 }
 218 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
 219     0, 0, sysctl_route_netisr_maxqlen, "I",
 220     "maximum routing socket dispatch queue length");
 221
 222 static void
 223 rts_init(void)
 224 {
 225         int tmp;
 226
 227         if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
 228                 rtsock_nh.nh_qlimit = tmp;
 229         netisr_register(&rtsock_nh);
 230 }
 231 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0);
 232
 233 static int
 234 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src,
 235     struct rawcb *rp)
 236 {
 237         int fibnum;
 238
 239         KASSERT(m != NULL, ("%s: m is NULL", __func__));
 240         KASSERT(proto != NULL, ("%s: proto is NULL", __func__));
 241         KASSERT(rp != NULL, ("%s: rp is NULL", __func__));
 242
 243         /* No filtering requested. */
 244         if ((m->m_flags & RTS_FILTER_FIB) == 0)
 245                 return (0);
 246
 247         /* Check if it is a rts and the fib matches the one of the socket. */
 248         fibnum = M_GETFIB(m);
 249         if (proto->sp_family != PF_ROUTE ||
 250             rp->rcb_socket == NULL ||
 251             rp->rcb_socket->so_fibnum == fibnum)
 252                 return (0);
 253
 254         /* Filtering requested and no match, the socket shall be skipped. */
 255         return (1);
 256 }
 257
 258 static void
 259 rts_input(struct mbuf *m)
 260 {
 261         struct sockproto route_proto;
 262         unsigned short *family;
 263         struct m_tag *tag;
 264
 265         route_proto.sp_family = PF_ROUTE;
 266         tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
 267         if (tag != NULL) {
 268                 family = (unsigned short *)(tag + 1);
 269                 route_proto.sp_protocol = *family;
 270                 m_tag_delete(m, tag);
 271         } else
 272                 route_proto.sp_protocol = 0;
 273
 274         raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb);
 275 }
 276
 277 /*
 278  * It really doesn't make any sense at all for this code to share much
 279  * with raw_usrreq.c, since its functionality is so restricted.  XXX
 280  */
 281 static void
 282 rts_abort(struct socket *so)
 283 {
 284
 285         raw_usrreqs.pru_abort(so);
 286 }
 287
 288 static void
 289 rts_close(struct socket *so)
 290 {
 291
 292         raw_usrreqs.pru_close(so);
 293 }
 294
 295 /* pru_accept is EOPNOTSUPP */
 296
 297 static int
 298 rts_attach(struct socket *so, int proto, struct thread *td)
 299 {
 300         struct rawcb *rp;
 301         int error;
 302
 303         KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
 304
 305         /* XXX */
 306         rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
 307         if (rp == NULL)
 308                 return ENOBUFS;
 309
 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                 so->so_pcb = NULL;
 316                 free(rp, M_PCB);
 317                 return error;
 318         }
 319         RTSOCK_LOCK();
 320         switch(rp->rcb_proto.sp_protocol) {
 321         case AF_INET:
 322                 V_route_cb.ip_count++;
 323                 break;
 324         case AF_INET6:
 325                 V_route_cb.ip6_count++;
 326                 break;
 327         case AF_IPX:
 328                 V_route_cb.ipx_count++;
 329                 break;
 330         }
 331         V_route_cb.any_count++;
 332         RTSOCK_UNLOCK();
 333         soisconnected(so);
 334         so->so_options |= SO_USELOOPBACK;
 335         return 0;
 336 }
 337
 338 static int
 339 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 340 {
 341
 342         return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
 343 }
 344
 345 static int
 346 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 347 {
 348
 349         return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
 350 }
 351
 352 /* pru_connect2 is EOPNOTSUPP */
 353 /* pru_control is EOPNOTSUPP */
 354
 355 static void
 356 rts_detach(struct socket *so)
 357 {
 358         struct rawcb *rp = sotorawcb(so);
 359
 360         KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
 361
 362         RTSOCK_LOCK();
 363         switch(rp->rcb_proto.sp_protocol) {
 364         case AF_INET:
 365                 V_route_cb.ip_count--;
 366                 break;
 367         case AF_INET6:
 368                 V_route_cb.ip6_count--;
 369                 break;
 370         case AF_IPX:
 371                 V_route_cb.ipx_count--;
 372                 break;
 373         }
 374         V_route_cb.any_count--;
 375         RTSOCK_UNLOCK();
 376         raw_usrreqs.pru_detach(so);
 377 }
 378
 379 static int
 380 rts_disconnect(struct socket *so)
 381 {
 382
 383         return (raw_usrreqs.pru_disconnect(so));
 384 }
 385
 386 /* pru_listen is EOPNOTSUPP */
 387
 388 static int
 389 rts_peeraddr(struct socket *so, struct sockaddr **nam)
 390 {
 391
 392         return (raw_usrreqs.pru_peeraddr(so, nam));
 393 }
 394
 395 /* pru_rcvd is EOPNOTSUPP */
 396 /* pru_rcvoob is EOPNOTSUPP */
 397
 398 static int
 399 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 400          struct mbuf *control, struct thread *td)
 401 {
 402
 403         return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
 404 }
 405
 406 /* pru_sense is null */
 407
 408 static int
 409 rts_shutdown(struct socket *so)
 410 {
 411
 412         return (raw_usrreqs.pru_shutdown(so));
 413 }
 414
 415 static int
 416 rts_sockaddr(struct socket *so, struct sockaddr **nam)
 417 {
 418
 419         return (raw_usrreqs.pru_sockaddr(so, nam));
 420 }
 421
 422 static struct pr_usrreqs route_usrreqs = {
 423         .pru_abort =            rts_abort,
 424         .pru_attach =           rts_attach,
 425         .pru_bind =             rts_bind,
 426         .pru_connect =          rts_connect,
 427         .pru_detach =           rts_detach,
 428         .pru_disconnect =       rts_disconnect,
 429         .pru_peeraddr =         rts_peeraddr,
 430         .pru_send =             rts_send,
 431         .pru_shutdown =         rts_shutdown,
 432         .pru_sockaddr =         rts_sockaddr,
 433         .pru_close =            rts_close,
 434 };
 435
 436 #ifndef _SOCKADDR_UNION_DEFINED
 437 #define _SOCKADDR_UNION_DEFINED
 438 /*
 439  * The union of all possible address formats we handle.
 440  */
 441 union sockaddr_union {
 442         struct sockaddr         sa;
 443         struct sockaddr_in      sin;
 444         struct sockaddr_in6     sin6;
 445 };
 446 #endif /* _SOCKADDR_UNION_DEFINED */
 447
 448 static int
 449 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
 450     struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred)
 451 {
 452
 453         /* First, see if the returned address is part of the jail. */
 454         if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) {
 455                 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
 456                 return (0);
 457         }
 458
 459         switch (info->rti_info[RTAX_DST]->sa_family) {
 460 #ifdef INET
 461         case AF_INET:
 462         {
 463                 struct in_addr ia;
 464                 struct ifaddr *ifa;
 465                 int found;
 466
 467                 found = 0;
 468                 /*
 469                  * Try to find an address on the given outgoing interface
 470                  * that belongs to the jail.
 471                  */
 472                 IF_ADDR_RLOCK(ifp);
 473                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 474                         struct sockaddr *sa;
 475                         sa = ifa->ifa_addr;
 476                         if (sa->sa_family != AF_INET)
 477                                 continue;
 478                         ia = ((struct sockaddr_in *)sa)->sin_addr;
 479                         if (prison_check_ip4(cred, &ia) == 0) {
 480                                 found = 1;
 481                                 break;
 482                         }
 483                 }
 484                 IF_ADDR_RUNLOCK(ifp);
 485                 if (!found) {
 486                         /*
 487                          * As a last resort return the 'default' jail address.
 488                          */
 489                         ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->
 490                             sin_addr;
 491                         if (prison_get_ip4(cred, &ia) != 0)
 492                                 return (ESRCH);
 493                 }
 494                 bzero(&saun->sin, sizeof(struct sockaddr_in));
 495                 saun->sin.sin_len = sizeof(struct sockaddr_in);
 496                 saun->sin.sin_family = AF_INET;
 497                 saun->sin.sin_addr.s_addr = ia.s_addr;
 498                 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
 499                 break;
 500         }
 501 #endif
 502 #ifdef INET6
 503         case AF_INET6:
 504         {
 505                 struct in6_addr ia6;
 506                 struct ifaddr *ifa;
 507                 int found;
 508
 509                 found = 0;
 510                 /*
 511                  * Try to find an address on the given outgoing interface
 512                  * that belongs to the jail.
 513                  */
 514                 IF_ADDR_RLOCK(ifp);
 515                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 516                         struct sockaddr *sa;
 517                         sa = ifa->ifa_addr;
 518                         if (sa->sa_family != AF_INET6)
 519                                 continue;
 520                         bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
 521                             &ia6, sizeof(struct in6_addr));
 522                         if (prison_check_ip6(cred, &ia6) == 0) {
 523                                 found = 1;
 524                                 break;
 525                         }
 526                 }
 527                 IF_ADDR_RUNLOCK(ifp);
 528                 if (!found) {
 529                         /*
 530                          * As a last resort return the 'default' jail address.
 531                          */
 532                         ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)->
 533                             sin6_addr;
 534                         if (prison_get_ip6(cred, &ia6) != 0)
 535                                 return (ESRCH);
 536                 }
 537                 bzero(&saun->sin6, sizeof(struct sockaddr_in6));
 538                 saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
 539                 saun->sin6.sin6_family = AF_INET6;
 540                 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
 541                 if (sa6_recoverscope(&saun->sin6) != 0)
 542                         return (ESRCH);
 543                 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
 544                 break;
 545         }
 546 #endif
 547         default:
 548                 return (ESRCH);
 549         }
 550         return (0);
 551 }
 552
 553 /*ARGSUSED*/
 554 static int
 555 route_output(struct mbuf *m, struct socket *so)
 556 {
 557 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0)
 558         struct rt_msghdr *rtm = NULL;
 559         struct rtentry *rt = NULL;
 560         struct radix_node_head *rnh;
 561         struct rt_addrinfo info;
 562 #ifdef INET6
 563         struct sockaddr_storage ss;
 564         struct sockaddr_in6 *sin6;
 565         int i, rti_need_deembed = 0;
 566 #endif
 567         int len, error = 0;
 568         struct ifnet *ifp = NULL;
 569         union sockaddr_union saun;
 570         sa_family_t saf = AF_UNSPEC;
 571
 572 #define senderr(e) { error = e; goto flush;}
 573         if (m == NULL || ((m->m_len < sizeof(long)) &&
 574                        (m = m_pullup(m, sizeof(long))) == NULL))
 575                 return (ENOBUFS);
 576         if ((m->m_flags & M_PKTHDR) == 0)
 577                 panic("route_output");
 578         len = m->m_pkthdr.len;
 579         if (len < sizeof(*rtm) ||
 580             len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
 581                 info.rti_info[RTAX_DST] = NULL;
 582                 senderr(EINVAL);
 583         }
 584         R_Malloc(rtm, struct rt_msghdr *, len);
 585         if (rtm == NULL) {
 586                 info.rti_info[RTAX_DST] = NULL;
 587                 senderr(ENOBUFS);
 588         }
 589         m_copydata(m, 0, len, (caddr_t)rtm);
 590         if (rtm->rtm_version != RTM_VERSION) {
 591                 info.rti_info[RTAX_DST] = NULL;
 592                 senderr(EPROTONOSUPPORT);
 593         }
 594         rtm->rtm_pid = curproc->p_pid;
 595         bzero(&info, sizeof(info));
 596         info.rti_addrs = rtm->rtm_addrs;
 597         /*
 598          * rt_xaddrs() performs s6_addr[2] := sin6_scope_id for AF_INET6
 599          * link-local address because rtrequest requires addresses with
 600          * embedded scope id.
 601          */
 602         if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
 603                 info.rti_info[RTAX_DST] = NULL;
 604                 senderr(EINVAL);
 605         }
 606         info.rti_flags = rtm->rtm_flags;
 607         if (info.rti_info[RTAX_DST] == NULL ||
 608             info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
 609             (info.rti_info[RTAX_GATEWAY] != NULL &&
 610              info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
 611                 senderr(EINVAL);
 612         saf = info.rti_info[RTAX_DST]->sa_family;
 613         /*
 614          * Verify that the caller has the appropriate privilege; RTM_GET
 615          * is the only operation the non-superuser is allowed.
 616          */
 617         if (rtm->rtm_type != RTM_GET) {
 618                 error = priv_check(curthread, PRIV_NET_ROUTE);
 619                 if (error)
 620                         senderr(error);
 621         }
 622
 623         /*
 624          * The given gateway address may be an interface address.
 625          * For example, issuing a "route change" command on a route
 626          * entry that was created from a tunnel, and the gateway
 627          * address given is the local end point. In this case the
 628          * RTF_GATEWAY flag must be cleared or the destination will
 629          * not be reachable even though there is no error message.
 630          */
 631         if (info.rti_info[RTAX_GATEWAY] != NULL &&
 632             info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
 633                 struct route gw_ro;
 634
 635                 bzero(&gw_ro, sizeof(gw_ro));
 636                 gw_ro.ro_dst = *info.rti_info[RTAX_GATEWAY];
 637                 rtalloc_ign_fib(&gw_ro, 0, so->so_fibnum);
 638                 /*
 639                  * A host route through the loopback interface is
 640                  * installed for each interface adddress. In pre 8.0
 641                  * releases the interface address of a PPP link type
 642                  * is not reachable locally. This behavior is fixed as
 643                  * part of the new L2/L3 redesign and rewrite work. The
 644                  * signature of this interface address route is the
 645                  * AF_LINK sa_family type of the rt_gateway, and the
 646                  * rt_ifp has the IFF_LOOPBACK flag set.
 647                  */
 648                 if (gw_ro.ro_rt != NULL &&
 649                     gw_ro.ro_rt->rt_gateway->sa_family == AF_LINK &&
 650                     gw_ro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) {
 651                         info.rti_flags &= ~RTF_GATEWAY;
 652                         info.rti_flags |= RTF_GWFLAG_COMPAT;
 653                 }
 654                 if (gw_ro.ro_rt != NULL)
 655                         RTFREE(gw_ro.ro_rt);
 656         }
 657
 658         switch (rtm->rtm_type) {
 659                 struct rtentry *saved_nrt;
 660
 661         case RTM_ADD:
 662                 if (info.rti_info[RTAX_GATEWAY] == NULL)
 663                         senderr(EINVAL);
 664                 saved_nrt = NULL;
 665
 666                 /* support for new ARP code */
 667                 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
 668                     (rtm->rtm_flags & RTF_LLDATA) != 0) {
 669                         error = lla_rt_output(rtm, &info);
 670 #ifdef INET6
 671                         if (error == 0)
 672                                 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
 673 #endif
 674                         break;
 675                 }
 676                 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt,
 677                     so->so_fibnum);
 678                 if (error == 0 && saved_nrt) {
 679 #ifdef INET6
 680                         rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
 681 #endif
 682                         RT_LOCK(saved_nrt);
 683                         rt_setmetrics(rtm->rtm_inits,
 684                                 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
 685                         rtm->rtm_index = saved_nrt->rt_ifp->if_index;
 686                         RT_REMREF(saved_nrt);
 687                         RT_UNLOCK(saved_nrt);
 688                 }
 689                 break;
 690
 691         case RTM_DELETE:
 692                 saved_nrt = NULL;
 693                 /* support for new ARP code */
 694                 if (info.rti_info[RTAX_GATEWAY] &&
 695                     (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
 696                     (rtm->rtm_flags & RTF_LLDATA) != 0) {
 697                         error = lla_rt_output(rtm, &info);
 698 #ifdef INET6
 699                         if (error == 0)
 700                                 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
 701 #endif
 702                         break;
 703                 }
 704                 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt,
 705                     so->so_fibnum);
 706                 if (error == 0) {
 707                         RT_LOCK(saved_nrt);
 708                         rt = saved_nrt;
 709                         goto report;
 710                 }
 711 #ifdef INET6
 712                 /* rt_msg2() will not be used when RTM_DELETE fails. */
 713                 rti_need_deembed = (V_deembed_scopeid) ? 1 : 0;
 714 #endif
 715                 break;
 716
 717         case RTM_GET:
 718         case RTM_CHANGE:
 719         case RTM_LOCK:
 720                 rnh = rt_tables_get_rnh(so->so_fibnum,
 721                     info.rti_info[RTAX_DST]->sa_family);
 722                 if (rnh == NULL)
 723                         senderr(EAFNOSUPPORT);
 724
 725                 RADIX_NODE_HEAD_RLOCK(rnh);
 726
 727                 if (info.rti_info[RTAX_NETMASK] == NULL &&
 728                     rtm->rtm_type == RTM_GET) {
 729                         /*
 730                          * Provide logest prefix match for
 731                          * address lookup (no mask).
 732                          * 'route -n get addr'
 733                          */
 734                         rt = (struct rtentry *) rnh->rnh_matchaddr(
 735                             info.rti_info[RTAX_DST], rnh);
 736                 } else
 737                         rt = (struct rtentry *) rnh->rnh_lookup(
 738                             info.rti_info[RTAX_DST],
 739                             info.rti_info[RTAX_NETMASK], rnh);
 740
 741                 if (rt == NULL) {
 742                         RADIX_NODE_HEAD_RUNLOCK(rnh);
 743                         senderr(ESRCH);
 744                 }
 745 #ifdef RADIX_MPATH
 746                 /*
 747                  * for RTM_CHANGE/LOCK, if we got multipath routes,
 748                  * we require users to specify a matching RTAX_GATEWAY.
 749                  *
 750                  * for RTM_GET, gate is optional even with multipath.
 751                  * if gate == NULL the first match is returned.
 752                  * (no need to call rt_mpath_matchgate if gate == NULL)
 753                  */
 754                 if (rn_mpath_capable(rnh) &&
 755                     (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
 756                         rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
 757                         if (!rt) {
 758                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 759                                 senderr(ESRCH);
 760                         }
 761                 }
 762 #endif
 763                 /*
 764                  * If performing proxied L2 entry insertion, and
 765                  * the actual PPP host entry is found, perform
 766                  * another search to retrieve the prefix route of
 767                  * the local end point of the PPP link.
 768                  */
 769                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 770                         struct sockaddr laddr;
 771
 772                         if (rt->rt_ifp != NULL &&
 773                             rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
 774                                 struct ifaddr *ifa;
 775
 776                                 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1);
 777                                 if (ifa != NULL)
 778                                         rt_maskedcopy(ifa->ifa_addr,
 779                                                       &laddr,
 780                                                       ifa->ifa_netmask);
 781                         } else
 782                                 rt_maskedcopy(rt->rt_ifa->ifa_addr,
 783                                               &laddr,
 784                                               rt->rt_ifa->ifa_netmask);
 785                         /*
 786                          * refactor rt and no lock operation necessary
 787                          */
 788                         rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, rnh);
 789                         if (rt == NULL) {
 790                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 791                                 senderr(ESRCH);
 792                         }
 793                 }
 794                 RT_LOCK(rt);
 795                 RT_ADDREF(rt);
 796                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 797
 798                 switch(rtm->rtm_type) {
 799
 800                 case RTM_GET:
 801                 report:
 802                         RT_LOCK_ASSERT(rt);
 803                         if ((rt->rt_flags & RTF_HOST) == 0
 804                             ? jailed_without_vnet(curthread->td_ucred)
 805                             : prison_if(curthread->td_ucred,
 806                             rt_key(rt)) != 0) {
 807                                 RT_UNLOCK(rt);
 808                                 senderr(ESRCH);
 809                         }
 810                         info.rti_info[RTAX_DST] = rt_key(rt);
 811                         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 812                         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
 813                         info.rti_info[RTAX_GENMASK] = 0;
 814                         if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
 815                                 ifp = rt->rt_ifp;
 816                                 if (ifp) {
 817                                         info.rti_info[RTAX_IFP] =
 818                                             ifp->if_addr->ifa_addr;
 819                                         error = rtm_get_jailed(&info, ifp, rt,
 820                                             &saun, curthread->td_ucred);
 821                                         if (error != 0) {
 822                                                 RT_UNLOCK(rt);
 823                                                 senderr(error);
 824                                         }
 825                                         if (ifp->if_flags & IFF_POINTOPOINT)
 826                                                 info.rti_info[RTAX_BRD] =
 827                                                     rt->rt_ifa->ifa_dstaddr;
 828                                         rtm->rtm_index = ifp->if_index;
 829                                 } else {
 830                                         info.rti_info[RTAX_IFP] = NULL;
 831                                         info.rti_info[RTAX_IFA] = NULL;
 832                                 }
 833                         } else if ((ifp = rt->rt_ifp) != NULL) {
 834                                 rtm->rtm_index = ifp->if_index;
 835                         }
 836                         len = rt_msg2(rtm->rtm_type, &info, NULL, NULL);
 837                         if (len > rtm->rtm_msglen) {
 838                                 struct rt_msghdr *new_rtm;
 839                                 R_Malloc(new_rtm, struct rt_msghdr *, len);
 840                                 if (new_rtm == NULL) {
 841                                         RT_UNLOCK(rt);
 842                                         senderr(ENOBUFS);
 843                                 }
 844                                 bcopy(rtm, new_rtm, rtm->rtm_msglen);
 845                                 Free(rtm); rtm = new_rtm;
 846                         }
 847                         (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL);
 848                         if (rt->rt_flags & RTF_GWFLAG_COMPAT)
 849                                 rtm->rtm_flags = RTF_GATEWAY |
 850                                         (rt->rt_flags & ~RTF_GWFLAG_COMPAT);
 851                         else
 852                                 rtm->rtm_flags = rt->rt_flags;
 853                         rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
 854                         rtm->rtm_addrs = info.rti_addrs;
 855                         break;
 856
 857                 case RTM_CHANGE:
 858                         /*
 859                          * New gateway could require new ifaddr, ifp;
 860                          * flags may also be different; ifp may be specified
 861                          * by ll sockaddr when protocol address is ambiguous
 862                          */
 863                         if (((rt->rt_flags & RTF_GATEWAY) &&
 864                              info.rti_info[RTAX_GATEWAY] != NULL) ||
 865                             info.rti_info[RTAX_IFP] != NULL ||
 866                             (info.rti_info[RTAX_IFA] != NULL &&
 867                              !sa_equal(info.rti_info[RTAX_IFA],
 868                                        rt->rt_ifa->ifa_addr))) {
 869                                 RT_UNLOCK(rt);
 870                                 RADIX_NODE_HEAD_LOCK(rnh);
 871                                 error = rt_getifa_fib(&info, rt->rt_fibnum);
 872                                 /*
 873                                  * XXXRW: Really we should release this
 874                                  * reference later, but this maintains
 875                                  * historical behavior.
 876                                  */
 877                                 if (info.rti_ifa != NULL)
 878                                         ifa_free(info.rti_ifa);
 879                                 RADIX_NODE_HEAD_UNLOCK(rnh);
 880                                 if (error != 0)
 881                                         senderr(error);
 882                                 RT_LOCK(rt);
 883                         }
 884                         if (info.rti_ifa != NULL &&
 885                             info.rti_ifa != rt->rt_ifa &&
 886                             rt->rt_ifa != NULL &&
 887                             rt->rt_ifa->ifa_rtrequest != NULL) {
 888                                 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt,
 889                                     &info);
 890                                 ifa_free(rt->rt_ifa);
 891                         }
 892                         if (info.rti_info[RTAX_GATEWAY] != NULL) {
 893                                 RT_UNLOCK(rt);
 894                                 RADIX_NODE_HEAD_LOCK(rnh);
 895                                 RT_LOCK(rt);
 896
 897                                 error = rt_setgate(rt, rt_key(rt),
 898                                     info.rti_info[RTAX_GATEWAY]);
 899                                 RADIX_NODE_HEAD_UNLOCK(rnh);
 900                                 if (error != 0) {
 901                                         RT_UNLOCK(rt);
 902                                         senderr(error);
 903                                 }
 904                                 rt->rt_flags &= ~RTF_GATEWAY;
 905                                 rt->rt_flags |= (RTF_GATEWAY & info.rti_flags);
 906                         }
 907                         if (info.rti_ifa != NULL &&
 908                             info.rti_ifa != rt->rt_ifa) {
 909                                 ifa_ref(info.rti_ifa);
 910                                 rt->rt_ifa = info.rti_ifa;
 911                                 rt->rt_ifp = info.rti_ifp;
 912                         }
 913                         /* Allow some flags to be toggled on change. */
 914                         rt->rt_flags = (rt->rt_flags & ~RTF_FMASK) |
 915                                     (rtm->rtm_flags & RTF_FMASK);
 916                         rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
 917                                         &rt->rt_rmx);
 918                         rtm->rtm_index = rt->rt_ifp->if_index;
 919                         if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
 920                                rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
 921                         /* FALLTHROUGH */
 922                 case RTM_LOCK:
 923                         /* We don't support locks anymore */
 924                         break;
 925                 }
 926                 RT_UNLOCK(rt);
 927                 break;
 928
 929         default:
 930                 senderr(EOPNOTSUPP);
 931         }
 932
 933 flush:
 934         if (rtm) {
 935                 if (error)
 936                         rtm->rtm_errno = error;
 937                 else
 938                         rtm->rtm_flags |= RTF_DONE;
 939         }
 940         if (rt)         /* XXX can this be true? */
 941                 RTFREE(rt);
 942     {
 943         struct rawcb *rp = NULL;
 944         /*
 945          * Check to see if we don't want our own messages.
 946          */
 947         if ((so->so_options & SO_USELOOPBACK) == 0) {
 948                 if (V_route_cb.any_count <= 1) {
 949                         if (rtm)
 950                                 Free(rtm);
 951                         m_freem(m);
 952                         return (error);
 953                 }
 954                 /* There is another listener, so construct message */
 955                 rp = sotorawcb(so);
 956         }
 957         if (rtm) {
 958 #ifdef INET6
 959                 if (rti_need_deembed) {
 960                         /* sin6_scope_id is recovered before sending rtm. */
 961                         sin6 = (struct sockaddr_in6 *)&ss;
 962                         for (i = 0; i < RTAX_MAX; i++) {
 963                                 if (info.rti_info[i] == NULL)
 964                                         continue;
 965                                 if (info.rti_info[i]->sa_family != AF_INET6)
 966                                         continue;
 967                                 bcopy(info.rti_info[i], sin6, sizeof(*sin6));
 968                                 if (sa6_recoverscope(sin6) == 0)
 969                                         bcopy(sin6, info.rti_info[i],
 970                                                     sizeof(*sin6));
 971                         }
 972                 }
 973 #endif
 974                 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
 975                 if (m->m_pkthdr.len < rtm->rtm_msglen) {
 976                         m_freem(m);
 977                         m = NULL;
 978                 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
 979                         m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
 980         }
 981         if (m) {
 982                 M_SETFIB(m, so->so_fibnum);
 983                 m->m_flags |= RTS_FILTER_FIB;
 984                 if (rp) {
 985                         /*
 986                          * XXX insure we don't get a copy by
 987                          * invalidating our protocol
 988                          */
 989                         unsigned short family = rp->rcb_proto.sp_family;
 990                         rp->rcb_proto.sp_family = 0;
 991                         rt_dispatch(m, saf);
 992                         rp->rcb_proto.sp_family = family;
 993                 } else
 994                         rt_dispatch(m, saf);
 995         }
 996         /* info.rti_info[RTAX_DST] (used above) can point inside of rtm */
 997         if (rtm)
 998                 Free(rtm);
 999     }
1000         return (error);
1001 #undef  sa_equal
1002 }
1003
1004 static void
1005 rt_setmetrics(u_long which, const struct rt_metrics *in,
1006         struct rt_metrics_lite *out)
1007 {
1008 #define metric(f, e) if (which & (f)) out->e = in->e;
1009         /*
1010          * Only these are stored in the routing entry since introduction
1011          * of tcp hostcache. The rest is ignored.
1012          */
1013         metric(RTV_MTU, rmx_mtu);
1014         metric(RTV_WEIGHT, rmx_weight);
1015         /* Userland -> kernel timebase conversion. */
1016         if (which & RTV_EXPIRE)
1017                 out->rmx_expire = in->rmx_expire ?
1018                     in->rmx_expire - time_second + time_uptime : 0;
1019 #undef metric
1020 }
1021
1022 static void
1023 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out)
1024 {
1025 #define metric(e) out->e = in->e;
1026         bzero(out, sizeof(*out));
1027         metric(rmx_mtu);
1028         metric(rmx_weight);
1029         /* Kernel -> userland timebase conversion. */
1030         out->rmx_expire = in->rmx_expire ?
1031             in->rmx_expire - time_uptime + time_second : 0;
1032 #undef metric
1033 }
1034
1035 /*
1036  * Extract the addresses of the passed sockaddrs.
1037  * Do a little sanity checking so as to avoid bad memory references.
1038  * This data is derived straight from userland.
1039  */
1040 static int
1041 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
1042 {
1043         struct sockaddr *sa;
1044         int i;
1045
1046         for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
1047                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
1048                         continue;
1049                 sa = (struct sockaddr *)cp;
1050                 /*
1051                  * It won't fit.
1052                  */
1053                 if (cp + sa->sa_len > cplim)
1054                         return (EINVAL);
1055                 /*
1056                  * there are no more.. quit now
1057                  * If there are more bits, they are in error.
1058                  * I've seen this. route(1) can evidently generate these.
1059                  * This causes kernel to core dump.
1060                  * for compatibility, If we see this, point to a safe address.
1061                  */
1062                 if (sa->sa_len == 0) {
1063                         rtinfo->rti_info[i] = &sa_zero;
1064                         return (0); /* should be EINVAL but for compat */
1065                 }
1066                 /* accept it */
1067 #ifdef INET6
1068                 if (sa->sa_family == AF_INET6)
1069                         sa6_embedscope((struct sockaddr_in6 *)sa,
1070                             V_ip6_use_defzone);
1071 #endif
1072                 rtinfo->rti_info[i] = sa;
1073                 cp += SA_SIZE(sa);
1074         }
1075         return (0);
1076 }
1077
1078 /*
1079  * Used by the routing socket.
1080  */
1081 static struct mbuf *
1082 rt_msg1(int type, struct rt_addrinfo *rtinfo)
1083 {
1084         struct rt_msghdr *rtm;
1085         struct mbuf *m;
1086         int i;
1087         struct sockaddr *sa;
1088 #ifdef INET6
1089         struct sockaddr_storage ss;
1090         struct sockaddr_in6 *sin6;
1091 #endif
1092         int len, dlen;
1093
1094         switch (type) {
1095
1096         case RTM_DELADDR:
1097         case RTM_NEWADDR:
1098                 len = sizeof(struct ifa_msghdr);
1099                 break;
1100
1101         case RTM_DELMADDR:
1102         case RTM_NEWMADDR:
1103                 len = sizeof(struct ifma_msghdr);
1104                 break;
1105
1106         case RTM_IFINFO:
1107                 len = sizeof(struct if_msghdr);
1108                 break;
1109
1110         case RTM_IFANNOUNCE:
1111         case RTM_IEEE80211:
1112                 len = sizeof(struct if_announcemsghdr);
1113                 break;
1114
1115         default:
1116                 len = sizeof(struct rt_msghdr);
1117         }
1118
1119         /* XXXGL: can we use MJUMPAGESIZE cluster here? */
1120         KASSERT(len <= MCLBYTES, ("%s: message too big", __func__));
1121         if (len > MHLEN)
1122                 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1123         else
1124                 m = m_gethdr(M_NOWAIT, MT_DATA);
1125         if (m == NULL)
1126                 return (m);
1127
1128         m->m_pkthdr.len = m->m_len = len;
1129         rtm = mtod(m, struct rt_msghdr *);
1130         bzero((caddr_t)rtm, len);
1131         for (i = 0; i < RTAX_MAX; i++) {
1132                 if ((sa = rtinfo->rti_info[i]) == NULL)
1133                         continue;
1134                 rtinfo->rti_addrs |= (1 << i);
1135                 dlen = SA_SIZE(sa);
1136 #ifdef INET6
1137                 if (V_deembed_scopeid && sa->sa_family == AF_INET6) {
1138                         sin6 = (struct sockaddr_in6 *)&ss;
1139                         bcopy(sa, sin6, sizeof(*sin6));
1140                         if (sa6_recoverscope(sin6) == 0)
1141                                 sa = (struct sockaddr *)sin6;
1142                 }
1143 #endif
1144                 m_copyback(m, len, dlen, (caddr_t)sa);
1145                 len += dlen;
1146         }
1147         if (m->m_pkthdr.len != len) {
1148                 m_freem(m);
1149                 return (NULL);
1150         }
1151         rtm->rtm_msglen = len;
1152         rtm->rtm_version = RTM_VERSION;
1153         rtm->rtm_type = type;
1154         return (m);
1155 }
1156
1157 /*
1158  * Used by the sysctl code and routing socket.
1159  */
1160 static int
1161 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
1162 {
1163         int i;
1164         int len, dlen, second_time = 0;
1165         caddr_t cp0;
1166 #ifdef INET6
1167         struct sockaddr_storage ss;
1168         struct sockaddr_in6 *sin6;
1169 #endif
1170
1171         rtinfo->rti_addrs = 0;
1172 again:
1173         switch (type) {
1174
1175         case RTM_DELADDR:
1176         case RTM_NEWADDR:
1177                 if (w != NULL && w->w_op == NET_RT_IFLISTL) {
1178 #ifdef COMPAT_FREEBSD32
1179                         if (w->w_req->flags & SCTL_MASK32)
1180                                 len = sizeof(struct ifa_msghdrl32);
1181                         else
1182 #endif
1183                                 len = sizeof(struct ifa_msghdrl);
1184                 } else
1185                         len = sizeof(struct ifa_msghdr);
1186                 break;
1187
1188         case RTM_IFINFO:
1189 #ifdef COMPAT_FREEBSD32
1190                 if (w != NULL && w->w_req->flags & SCTL_MASK32) {
1191                         if (w->w_op == NET_RT_IFLISTL)
1192                                 len = sizeof(struct if_msghdrl32);
1193                         else
1194                                 len = sizeof(struct if_msghdr32);
1195                         break;
1196                 }
1197 #endif
1198                 if (w != NULL && w->w_op == NET_RT_IFLISTL)
1199                         len = sizeof(struct if_msghdrl);
1200                 else
1201                         len = sizeof(struct if_msghdr);
1202                 break;
1203
1204         case RTM_NEWMADDR:
1205                 len = sizeof(struct ifma_msghdr);
1206                 break;
1207
1208         default:
1209                 len = sizeof(struct rt_msghdr);
1210         }
1211         cp0 = cp;
1212         if (cp0)
1213                 cp += len;
1214         for (i = 0; i < RTAX_MAX; i++) {
1215                 struct sockaddr *sa;
1216
1217                 if ((sa = rtinfo->rti_info[i]) == NULL)
1218                         continue;
1219                 rtinfo->rti_addrs |= (1 << i);
1220                 dlen = SA_SIZE(sa);
1221                 if (cp) {
1222 #ifdef INET6
1223                         if (V_deembed_scopeid && sa->sa_family == AF_INET6) {
1224                                 sin6 = (struct sockaddr_in6 *)&ss;
1225                                 bcopy(sa, sin6, sizeof(*sin6));
1226                                 if (sa6_recoverscope(sin6) == 0)
1227                                         sa = (struct sockaddr *)sin6;
1228                         }
1229 #endif
1230                         bcopy((caddr_t)sa, cp, (unsigned)dlen);
1231                         cp += dlen;
1232                 }
1233                 len += dlen;
1234         }
1235         len = ALIGN(len);
1236         if (cp == NULL && w != NULL && !second_time) {
1237                 struct walkarg *rw = w;
1238
1239                 if (rw->w_req) {
1240                         if (rw->w_tmemsize < len) {
1241                                 if (rw->w_tmem)
1242                                         free(rw->w_tmem, M_RTABLE);
1243                                 rw->w_tmem = (caddr_t)
1244                                         malloc(len, M_RTABLE, M_NOWAIT);
1245                                 if (rw->w_tmem)
1246                                         rw->w_tmemsize = len;
1247                         }
1248                         if (rw->w_tmem) {
1249                                 cp = rw->w_tmem;
1250                                 second_time = 1;
1251                                 goto again;
1252                         }
1253                 }
1254         }
1255         if (cp) {
1256                 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
1257
1258                 rtm->rtm_version = RTM_VERSION;
1259                 rtm->rtm_type = type;
1260                 rtm->rtm_msglen = len;
1261         }
1262         return (len);
1263 }
1264
1265 /*
1266  * This routine is called to generate a message from the routing
1267  * socket indicating that a redirect has occured, a routing lookup
1268  * has failed, or that a protocol has detected timeouts to a particular
1269  * destination.
1270  */
1271 void
1272 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error,
1273     int fibnum)
1274 {
1275         struct rt_msghdr *rtm;
1276         struct mbuf *m;
1277         struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
1278
1279         if (V_route_cb.any_count == 0)
1280                 return;
1281         m = rt_msg1(type, rtinfo);
1282         if (m == NULL)
1283                 return;
1284
1285         if (fibnum != RT_ALL_FIBS) {
1286                 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
1287                     "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
1288                 M_SETFIB(m, fibnum);
1289                 m->m_flags |= RTS_FILTER_FIB;
1290         }
1291
1292         rtm = mtod(m, struct rt_msghdr *);
1293         rtm->rtm_flags = RTF_DONE | flags;
1294         rtm->rtm_errno = error;
1295         rtm->rtm_addrs = rtinfo->rti_addrs;
1296         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1297 }
1298
1299 void
1300 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
1301 {
1302
1303         rt_missmsg_fib(type, rtinfo, flags, error, RT_ALL_FIBS);
1304 }
1305
1306 /*
1307  * This routine is called to generate a message from the routing
1308  * socket indicating that the status of a network interface has changed.
1309  */
1310 void
1311 rt_ifmsg(struct ifnet *ifp)
1312 {
1313         struct if_msghdr *ifm;
1314         struct mbuf *m;
1315         struct rt_addrinfo info;
1316
1317         if (V_route_cb.any_count == 0)
1318                 return;
1319         bzero((caddr_t)&info, sizeof(info));
1320         m = rt_msg1(RTM_IFINFO, &info);
1321         if (m == NULL)
1322                 return;
1323         ifm = mtod(m, struct if_msghdr *);
1324         ifm->ifm_index = ifp->if_index;
1325         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1326         ifm->ifm_data = ifp->if_data;
1327         ifm->ifm_addrs = 0;
1328         rt_dispatch(m, AF_UNSPEC);
1329 }
1330
1331 /*
1332  * Announce interface address arrival/withdraw.
1333  * Please do not call directly, use rt_addrmsg().
1334  * Assume input data to be valid.
1335  * Returns 0 on success.
1336  */
1337 int
1338 rtsock_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
1339 {
1340         struct rt_addrinfo info;
1341         struct sockaddr *sa;
1342         int ncmd;
1343         struct mbuf *m;
1344         struct ifa_msghdr *ifam;
1345         struct ifnet *ifp = ifa->ifa_ifp;
1346
1347         if (V_route_cb.any_count == 0)
1348                 return (0);
1349
1350         ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
1351
1352         bzero((caddr_t)&info, sizeof(info));
1353         info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
1354         info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
1355         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1356         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1357         if ((m = rt_msg1(ncmd, &info)) == NULL)
1358                 return (ENOBUFS);
1359         ifam = mtod(m, struct ifa_msghdr *);
1360         ifam->ifam_index = ifp->if_index;
1361         ifam->ifam_metric = ifa->ifa_metric;
1362         ifam->ifam_flags = ifa->ifa_flags;
1363         ifam->ifam_addrs = info.rti_addrs;
1364
1365         if (fibnum != RT_ALL_FIBS) {
1366                 M_SETFIB(m, fibnum);
1367                 m->m_flags |= RTS_FILTER_FIB;
1368         }
1369
1370         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1371
1372         return (0);
1373 }
1374
1375 /*
1376  * Announce route addition/removal.
1377  * Please do not call directly, use rt_routemsg().
1378  * Note that @rt data MAY be inconsistent/invalid:
1379  * if some userland app sends us "invalid" route message (invalid mask,
1380  * no dst, wrong address families, etc...) we need to pass it back
1381  * to app (and any other rtsock consumers) with rtm_errno field set to
1382  * non-zero value.
1383  *
1384  * Returns 0 on success.
1385  */
1386 int
1387 rtsock_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt,
1388     int fibnum)
1389 {
1390         struct rt_addrinfo info;
1391         struct sockaddr *sa;
1392         struct mbuf *m;
1393         struct rt_msghdr *rtm;
1394
1395         if (V_route_cb.any_count == 0)
1396                 return (0);
1397
1398         bzero((caddr_t)&info, sizeof(info));
1399         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1400         info.rti_info[RTAX_DST] = sa = rt_key(rt);
1401         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1402         if ((m = rt_msg1(cmd, &info)) == NULL)
1403                 return (ENOBUFS);
1404         rtm = mtod(m, struct rt_msghdr *);
1405         rtm->rtm_index = ifp->if_index;
1406         rtm->rtm_flags |= rt->rt_flags;
1407         rtm->rtm_errno = error;
1408         rtm->rtm_addrs = info.rti_addrs;
1409
1410         if (fibnum != RT_ALL_FIBS) {
1411                 M_SETFIB(m, fibnum);
1412                 m->m_flags |= RTS_FILTER_FIB;
1413         }
1414
1415         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1416
1417         return (0);
1418 }
1419
1420 /*
1421  * This is the analogue to the rt_newaddrmsg which performs the same
1422  * function but for multicast group memberhips.  This is easier since
1423  * there is no route state to worry about.
1424  */
1425 void
1426 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1427 {
1428         struct rt_addrinfo info;
1429         struct mbuf *m = NULL;
1430         struct ifnet *ifp = ifma->ifma_ifp;
1431         struct ifma_msghdr *ifmam;
1432
1433         if (V_route_cb.any_count == 0)
1434                 return;
1435
1436         bzero((caddr_t)&info, sizeof(info));
1437         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1438         info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
1439         /*
1440          * If a link-layer address is present, present it as a ``gateway''
1441          * (similarly to how ARP entries, e.g., are presented).
1442          */
1443         info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
1444         m = rt_msg1(cmd, &info);
1445         if (m == NULL)
1446                 return;
1447         ifmam = mtod(m, struct ifma_msghdr *);
1448         KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
1449             __func__));
1450         ifmam->ifmam_index = ifp->if_index;
1451         ifmam->ifmam_addrs = info.rti_addrs;
1452         rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC);
1453 }
1454
1455 static struct mbuf *
1456 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1457         struct rt_addrinfo *info)
1458 {
1459         struct if_announcemsghdr *ifan;
1460         struct mbuf *m;
1461
1462         if (V_route_cb.any_count == 0)
1463                 return NULL;
1464         bzero((caddr_t)info, sizeof(*info));
1465         m = rt_msg1(type, info);
1466         if (m != NULL) {
1467                 ifan = mtod(m, struct if_announcemsghdr *);
1468                 ifan->ifan_index = ifp->if_index;
1469                 strlcpy(ifan->ifan_name, ifp->if_xname,
1470                         sizeof(ifan->ifan_name));
1471                 ifan->ifan_what = what;
1472         }
1473         return m;
1474 }
1475
1476 /*
1477  * This is called to generate routing socket messages indicating
1478  * IEEE80211 wireless events.
1479  * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1480  */
1481 void
1482 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1483 {
1484         struct mbuf *m;
1485         struct rt_addrinfo info;
1486
1487         m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1488         if (m != NULL) {
1489                 /*
1490                  * Append the ieee80211 data.  Try to stick it in the
1491                  * mbuf containing the ifannounce msg; otherwise allocate
1492                  * a new mbuf and append.
1493                  *
1494                  * NB: we assume m is a single mbuf.
1495                  */
1496                 if (data_len > M_TRAILINGSPACE(m)) {
1497                         struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
1498                         if (n == NULL) {
1499                                 m_freem(m);
1500                                 return;
1501                         }
1502                         bcopy(data, mtod(n, void *), data_len);
1503                         n->m_len = data_len;
1504                         m->m_next = n;
1505                 } else if (data_len > 0) {
1506                         bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1507                         m->m_len += data_len;
1508                 }
1509                 if (m->m_flags & M_PKTHDR)
1510                         m->m_pkthdr.len += data_len;
1511                 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1512                 rt_dispatch(m, AF_UNSPEC);
1513         }
1514 }
1515
1516 /*
1517  * This is called to generate routing socket messages indicating
1518  * network interface arrival and departure.
1519  */
1520 void
1521 rt_ifannouncemsg(struct ifnet *ifp, int what)
1522 {
1523         struct mbuf *m;
1524         struct rt_addrinfo info;
1525
1526         m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
1527         if (m != NULL)
1528                 rt_dispatch(m, AF_UNSPEC);
1529 }
1530
1531 static void
1532 rt_dispatch(struct mbuf *m, sa_family_t saf)
1533 {
1534         struct m_tag *tag;
1535
1536         /*
1537          * Preserve the family from the sockaddr, if any, in an m_tag for
1538          * use when injecting the mbuf into the routing socket buffer from
1539          * the netisr.
1540          */
1541         if (saf != AF_UNSPEC) {
1542                 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
1543                     M_NOWAIT);
1544                 if (tag == NULL) {
1545                         m_freem(m);
1546                         return;
1547                 }
1548                 *(unsigned short *)(tag + 1) = saf;
1549                 m_tag_prepend(m, tag);
1550         }
1551 #ifdef VIMAGE
1552         if (V_loif)
1553                 m->m_pkthdr.rcvif = V_loif;
1554         else {
1555                 m_freem(m);
1556                 return;
1557         }
1558 #endif
1559         netisr_queue(NETISR_ROUTE, m);  /* mbuf is free'd on failure. */
1560 }
1561
1562 /*
1563  * This is used in dumping the kernel table via sysctl().
1564  */
1565 static int
1566 sysctl_dumpentry(struct radix_node *rn, void *vw)
1567 {
1568         struct walkarg *w = vw;
1569         struct rtentry *rt = (struct rtentry *)rn;
1570         int error = 0, size;
1571         struct rt_addrinfo info;
1572
1573         if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1574                 return 0;
1575         if ((rt->rt_flags & RTF_HOST) == 0
1576             ? jailed_without_vnet(w->w_req->td->td_ucred)
1577             : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0)
1578                 return (0);
1579         bzero((caddr_t)&info, sizeof(info));
1580         info.rti_info[RTAX_DST] = rt_key(rt);
1581         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1582         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1583         info.rti_info[RTAX_GENMASK] = 0;
1584         if (rt->rt_ifp) {
1585                 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
1586                 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
1587                 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1588                         info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
1589         }
1590         size = rt_msg2(RTM_GET, &info, NULL, w);
1591         if (w->w_req && w->w_tmem) {
1592                 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1593
1594                 if (rt->rt_flags & RTF_GWFLAG_COMPAT)
1595                         rtm->rtm_flags = RTF_GATEWAY |
1596                                 (rt->rt_flags & ~RTF_GWFLAG_COMPAT);
1597                 else
1598                         rtm->rtm_flags = rt->rt_flags;
1599                 /*
1600                  * let's be honest about this being a retarded hack
1601                  */
1602                 rtm->rtm_fmask = rt->rt_rmx.rmx_pksent;
1603                 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
1604                 rtm->rtm_index = rt->rt_ifp->if_index;
1605                 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1606                 rtm->rtm_addrs = info.rti_addrs;
1607                 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1608                 return (error);
1609         }
1610         return (error);
1611 }
1612
1613 #ifdef COMPAT_FREEBSD32
1614 static void
1615 copy_ifdata32(struct if_data *src, struct if_data32 *dst)
1616 {
1617
1618         bzero(dst, sizeof(*dst));
1619         CP(*src, *dst, ifi_type);
1620         CP(*src, *dst, ifi_physical);
1621         CP(*src, *dst, ifi_addrlen);
1622         CP(*src, *dst, ifi_hdrlen);
1623         CP(*src, *dst, ifi_link_state);
1624         CP(*src, *dst, ifi_vhid);
1625         CP(*src, *dst, ifi_baudrate_pf);
1626         dst->ifi_datalen = sizeof(struct if_data32);
1627         CP(*src, *dst, ifi_mtu);
1628         CP(*src, *dst, ifi_metric);
1629         CP(*src, *dst, ifi_baudrate);
1630         CP(*src, *dst, ifi_ipackets);
1631         CP(*src, *dst, ifi_ierrors);
1632         CP(*src, *dst, ifi_opackets);
1633         CP(*src, *dst, ifi_oerrors);
1634         CP(*src, *dst, ifi_collisions);
1635         CP(*src, *dst, ifi_ibytes);
1636         CP(*src, *dst, ifi_obytes);
1637         CP(*src, *dst, ifi_imcasts);
1638         CP(*src, *dst, ifi_omcasts);
1639         CP(*src, *dst, ifi_iqdrops);
1640         CP(*src, *dst, ifi_noproto);
1641         CP(*src, *dst, ifi_hwassist);
1642         CP(*src, *dst, ifi_epoch);
1643         TV_CP(*src, *dst, ifi_lastchange);
1644 }
1645 #endif
1646
1647 static int
1648 sysctl_iflist_ifml(struct ifnet *ifp, struct rt_addrinfo *info,
1649     struct walkarg *w, int len)
1650 {
1651         struct if_msghdrl *ifm;
1652
1653 #ifdef COMPAT_FREEBSD32
1654         if (w->w_req->flags & SCTL_MASK32) {
1655                 struct if_msghdrl32 *ifm32;
1656
1657                 ifm32 = (struct if_msghdrl32 *)w->w_tmem;
1658                 ifm32->ifm_addrs = info->rti_addrs;
1659                 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1660                 ifm32->ifm_index = ifp->if_index;
1661                 ifm32->_ifm_spare1 = 0;
1662                 ifm32->ifm_len = sizeof(*ifm32);
1663                 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data);
1664
1665                 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1666                 /* Fixup if_data carp(4) vhid. */
1667                 if (carp_get_vhid_p != NULL)
1668                         ifm32->ifm_data.ifi_vhid =
1669                             (*carp_get_vhid_p)(ifp->if_addr);
1670
1671                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1672         }
1673 #endif
1674         ifm = (struct if_msghdrl *)w->w_tmem;
1675         ifm->ifm_addrs = info->rti_addrs;
1676         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1677         ifm->ifm_index = ifp->if_index;
1678         ifm->_ifm_spare1 = 0;
1679         ifm->ifm_len = sizeof(*ifm);
1680         ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data);
1681
1682         ifm->ifm_data = ifp->if_data;
1683         /* Fixup if_data carp(4) vhid. */
1684         if (carp_get_vhid_p != NULL)
1685                 ifm->ifm_data.ifi_vhid = (*carp_get_vhid_p)(ifp->if_addr);
1686
1687         return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1688 }
1689
1690 static int
1691 sysctl_iflist_ifm(struct ifnet *ifp, struct rt_addrinfo *info,
1692     struct walkarg *w, int len)
1693 {
1694         struct if_msghdr *ifm;
1695
1696 #ifdef COMPAT_FREEBSD32
1697         if (w->w_req->flags & SCTL_MASK32) {
1698                 struct if_msghdr32 *ifm32;
1699
1700                 ifm32 = (struct if_msghdr32 *)w->w_tmem;
1701                 ifm32->ifm_addrs = info->rti_addrs;
1702                 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1703                 ifm32->ifm_index = ifp->if_index;
1704
1705                 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1706                 /* Fixup if_data carp(4) vhid. */
1707                 if (carp_get_vhid_p != NULL)
1708                         ifm32->ifm_data.ifi_vhid =
1709                             (*carp_get_vhid_p)(ifp->if_addr);
1710
1711                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1712         }
1713 #endif
1714         ifm = (struct if_msghdr *)w->w_tmem;
1715         ifm->ifm_addrs = info->rti_addrs;
1716         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1717         ifm->ifm_index = ifp->if_index;
1718
1719         ifm->ifm_data = ifp->if_data;
1720         /* Fixup if_data carp(4) vhid. */
1721         if (carp_get_vhid_p != NULL)
1722                 ifm->ifm_data.ifi_vhid = (*carp_get_vhid_p)(ifp->if_addr);
1723
1724         return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1725 }
1726
1727 static int
1728 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info,
1729     struct walkarg *w, int len)
1730 {
1731         struct ifa_msghdrl *ifam;
1732
1733 #ifdef COMPAT_FREEBSD32
1734         if (w->w_req->flags & SCTL_MASK32) {
1735                 struct ifa_msghdrl32 *ifam32;
1736
1737                 ifam32 = (struct ifa_msghdrl32 *)w->w_tmem;
1738                 ifam32->ifam_addrs = info->rti_addrs;
1739                 ifam32->ifam_flags = ifa->ifa_flags;
1740                 ifam32->ifam_index = ifa->ifa_ifp->if_index;
1741                 ifam32->_ifam_spare1 = 0;
1742                 ifam32->ifam_len = sizeof(*ifam32);
1743                 ifam32->ifam_data_off =
1744                     offsetof(struct ifa_msghdrl32, ifam_data);
1745                 ifam32->ifam_metric = ifa->ifa_metric;
1746
1747                 bzero(&ifam32->ifam_data, sizeof(ifam32->ifam_data));
1748                 ifam32->ifam_data.ifi_datalen = sizeof(struct if_data32);
1749                 ifam32->ifam_data.ifi_ipackets =
1750                     counter_u64_fetch(ifa->ifa_ipackets);
1751                 ifam32->ifam_data.ifi_opackets =
1752                     counter_u64_fetch(ifa->ifa_opackets);
1753                 ifam32->ifam_data.ifi_ibytes =
1754                     counter_u64_fetch(ifa->ifa_ibytes);
1755                 ifam32->ifam_data.ifi_obytes =
1756                     counter_u64_fetch(ifa->ifa_obytes);
1757
1758                 /* Fixup if_data carp(4) vhid. */
1759                 if (carp_get_vhid_p != NULL)
1760                         ifam32->ifam_data.ifi_vhid = (*carp_get_vhid_p)(ifa);
1761
1762                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifam32, len));
1763         }
1764 #endif
1765
1766         ifam = (struct ifa_msghdrl *)w->w_tmem;
1767         ifam->ifam_addrs = info->rti_addrs;
1768         ifam->ifam_flags = ifa->ifa_flags;
1769         ifam->ifam_index = ifa->ifa_ifp->if_index;
1770         ifam->_ifam_spare1 = 0;
1771         ifam->ifam_len = sizeof(*ifam);
1772         ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data);
1773         ifam->ifam_metric = ifa->ifa_metric;
1774
1775         bzero(&ifam->ifam_data, sizeof(ifam->ifam_data));
1776         ifam->ifam_data.ifi_datalen = sizeof(struct if_data);
1777         ifam->ifam_data.ifi_ipackets = counter_u64_fetch(ifa->ifa_ipackets);
1778         ifam->ifam_data.ifi_opackets = counter_u64_fetch(ifa->ifa_opackets);
1779         ifam->ifam_data.ifi_ibytes = counter_u64_fetch(ifa->ifa_ibytes);
1780         ifam->ifam_data.ifi_obytes = counter_u64_fetch(ifa->ifa_obytes);
1781
1782         /* Fixup if_data carp(4) vhid. */
1783         if (carp_get_vhid_p != NULL)
1784                 ifam->ifam_data.ifi_vhid = (*carp_get_vhid_p)(ifa);
1785
1786         return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1787 }
1788
1789 static int
1790 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info,
1791     struct walkarg *w, int len)
1792 {
1793         struct ifa_msghdr *ifam;
1794
1795         ifam = (struct ifa_msghdr *)w->w_tmem;
1796         ifam->ifam_addrs = info->rti_addrs;
1797         ifam->ifam_flags = ifa->ifa_flags;
1798         ifam->ifam_index = ifa->ifa_ifp->if_index;
1799         ifam->ifam_metric = ifa->ifa_metric;
1800
1801         return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1802 }
1803
1804 static int
1805 sysctl_iflist(int af, struct walkarg *w)
1806 {
1807         struct ifnet *ifp;
1808         struct ifaddr *ifa;
1809         struct rt_addrinfo info;
1810         int len, error = 0;
1811
1812         bzero((caddr_t)&info, sizeof(info));
1813         IFNET_RLOCK_NOSLEEP();
1814         TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1815                 if (w->w_arg && w->w_arg != ifp->if_index)
1816                         continue;
1817                 IF_ADDR_RLOCK(ifp);
1818                 ifa = ifp->if_addr;
1819                 info.rti_info[RTAX_IFP] = ifa->ifa_addr;
1820                 len = rt_msg2(RTM_IFINFO, &info, NULL, w);
1821                 info.rti_info[RTAX_IFP] = NULL;
1822                 if (w->w_req && w->w_tmem) {
1823                         if (w->w_op == NET_RT_IFLISTL)
1824                                 error = sysctl_iflist_ifml(ifp, &info, w, len);
1825                         else
1826                                 error = sysctl_iflist_ifm(ifp, &info, w, len);
1827                         if (error)
1828                                 goto done;
1829                 }
1830                 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1831                         if (af && af != ifa->ifa_addr->sa_family)
1832                                 continue;
1833                         if (prison_if(w->w_req->td->td_ucred,
1834                             ifa->ifa_addr) != 0)
1835                                 continue;
1836                         info.rti_info[RTAX_IFA] = ifa->ifa_addr;
1837                         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1838                         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1839                         len = rt_msg2(RTM_NEWADDR, &info, NULL, w);
1840                         if (w->w_req && w->w_tmem) {
1841                                 if (w->w_op == NET_RT_IFLISTL)
1842                                         error = sysctl_iflist_ifaml(ifa, &info,
1843                                             w, len);
1844                                 else
1845                                         error = sysctl_iflist_ifam(ifa, &info,
1846                                             w, len);
1847                                 if (error)
1848                                         goto done;
1849                         }
1850                 }
1851                 IF_ADDR_RUNLOCK(ifp);
1852                 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] =
1853                         info.rti_info[RTAX_BRD] = NULL;
1854         }
1855 done:
1856         if (ifp != NULL)
1857                 IF_ADDR_RUNLOCK(ifp);
1858         IFNET_RUNLOCK_NOSLEEP();
1859         return (error);
1860 }
1861
1862 static int
1863 sysctl_ifmalist(int af, struct walkarg *w)
1864 {
1865         struct ifnet *ifp;
1866         struct ifmultiaddr *ifma;
1867         struct  rt_addrinfo info;
1868         int     len, error = 0;
1869         struct ifaddr *ifa;
1870
1871         bzero((caddr_t)&info, sizeof(info));
1872         IFNET_RLOCK_NOSLEEP();
1873         TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1874                 if (w->w_arg && w->w_arg != ifp->if_index)
1875                         continue;
1876                 ifa = ifp->if_addr;
1877                 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
1878                 IF_ADDR_RLOCK(ifp);
1879                 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1880                         if (af && af != ifma->ifma_addr->sa_family)
1881                                 continue;
1882                         if (prison_if(w->w_req->td->td_ucred,
1883                             ifma->ifma_addr) != 0)
1884                                 continue;
1885                         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1886                         info.rti_info[RTAX_GATEWAY] =
1887                             (ifma->ifma_addr->sa_family != AF_LINK) ?
1888                             ifma->ifma_lladdr : NULL;
1889                         len = rt_msg2(RTM_NEWMADDR, &info, NULL, w);
1890                         if (w->w_req && w->w_tmem) {
1891                                 struct ifma_msghdr *ifmam;
1892
1893                                 ifmam = (struct ifma_msghdr *)w->w_tmem;
1894                                 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1895                                 ifmam->ifmam_flags = 0;
1896                                 ifmam->ifmam_addrs = info.rti_addrs;
1897                                 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1898                                 if (error) {
1899                                         IF_ADDR_RUNLOCK(ifp);
1900                                         goto done;
1901                                 }
1902                         }
1903                 }
1904                 IF_ADDR_RUNLOCK(ifp);
1905         }
1906 done:
1907         IFNET_RUNLOCK_NOSLEEP();
1908         return (error);
1909 }
1910
1911 static int
1912 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1913 {
1914         int     *name = (int *)arg1;
1915         u_int   namelen = arg2;
1916         struct radix_node_head *rnh = NULL; /* silence compiler. */
1917         int     i, lim, error = EINVAL;
1918         int     fib = 0;
1919         u_char  af;
1920         struct  walkarg w;
1921
1922         name ++;
1923         namelen--;
1924         if (req->newptr)
1925                 return (EPERM);
1926         if (name[1] == NET_RT_DUMP) {
1927                 if (namelen == 3)
1928                         fib = req->td->td_proc->p_fibnum;
1929                 else if (namelen == 4)
1930                         fib = (name[3] == RT_ALL_FIBS) ?
1931                             req->td->td_proc->p_fibnum : name[3];
1932                 else
1933                         return ((namelen < 3) ? EISDIR : ENOTDIR);
1934                 if (fib < 0 || fib >= rt_numfibs)
1935                         return (EINVAL);
1936         } else if (namelen != 3)
1937                 return ((namelen < 3) ? EISDIR : ENOTDIR);
1938         af = name[0];
1939         if (af > AF_MAX)
1940                 return (EINVAL);
1941         bzero(&w, sizeof(w));
1942         w.w_op = name[1];
1943         w.w_arg = name[2];
1944         w.w_req = req;
1945
1946         error = sysctl_wire_old_buffer(req, 0);
1947         if (error)
1948                 return (error);
1949         switch (w.w_op) {
1950
1951         case NET_RT_DUMP:
1952         case NET_RT_FLAGS:
1953                 if (af == 0) {                  /* dump all tables */
1954                         i = 1;
1955                         lim = AF_MAX;
1956                 } else                          /* dump only one table */
1957                         i = lim = af;
1958
1959                 /*
1960                  * take care of llinfo entries, the caller must
1961                  * specify an AF
1962                  */
1963                 if (w.w_op == NET_RT_FLAGS &&
1964                     (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) {
1965                         if (af != 0)
1966                                 error = lltable_sysctl_dumparp(af, w.w_req);
1967                         else
1968                                 error = EINVAL;
1969                         break;
1970                 }
1971                 /*
1972                  * take care of routing entries
1973                  */
1974                 for (error = 0; error == 0 && i <= lim; i++) {
1975                         rnh = rt_tables_get_rnh(fib, i);
1976                         if (rnh != NULL) {
1977                                 RADIX_NODE_HEAD_RLOCK(rnh);
1978                                 error = rnh->rnh_walktree(rnh,
1979                                     sysctl_dumpentry, &w);
1980                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
1981                         } else if (af != 0)
1982                                 error = EAFNOSUPPORT;
1983                 }
1984                 break;
1985
1986         case NET_RT_IFLIST:
1987         case NET_RT_IFLISTL:
1988                 error = sysctl_iflist(af, &w);
1989                 break;
1990
1991         case NET_RT_IFMALIST:
1992                 error = sysctl_ifmalist(af, &w);
1993                 break;
1994         }
1995         if (w.w_tmem)
1996                 free(w.w_tmem, M_RTABLE);
1997         return (error);
1998 }
1999
2000 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
2001
2002 /*
2003  * Definitions of protocols supported in the ROUTE domain.
2004  */
2005
2006 static struct domain routedomain;               /* or at least forward */
2007
2008 static struct protosw routesw[] = {
2009 {
2010         .pr_type =              SOCK_RAW,
2011         .pr_domain =            &routedomain,
2012         .pr_flags =             PR_ATOMIC|PR_ADDR,
2013         .pr_output =            route_output,
2014         .pr_ctlinput =          raw_ctlinput,
2015         .pr_init =              raw_init,
2016         .pr_usrreqs =           &route_usrreqs
2017 }
2018 };
2019
2020 static struct domain routedomain = {
2021         .dom_family =           PF_ROUTE,
2022         .dom_name =              "route",
2023         .dom_protosw =          routesw,
2024         .dom_protoswNPROTOSW =  &routesw[sizeof(routesw)/sizeof(routesw[0])]
2025 };
2026
2027 VNET_DOMAIN_SET(route);