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