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_sctp.h"
  34 #include "opt_mpath.h"
  35 #include "opt_inet.h"
  36 #include "opt_inet6.h"
  37
  38 #include <sys/param.h>
  39 #include <sys/jail.h>
  40 #include <sys/kernel.h>
  41 #include <sys/domain.h>
  42 #include <sys/lock.h>
  43 #include <sys/malloc.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/priv.h>
  46 #include <sys/proc.h>
  47 #include <sys/protosw.h>
  48 #include <sys/rwlock.h>
  49 #include <sys/signalvar.h>
  50 #include <sys/socket.h>
  51 #include <sys/socketvar.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/systm.h>
  54
  55 #include <net/if.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/scope6_var.h>
  69 #endif
  70
  71 #if defined(INET) || defined(INET6)
  72 #ifdef SCTP
  73 extern void sctp_addr_change(struct ifaddr *ifa, int cmd);
  74 #endif /* SCTP */
  75 #endif
  76
  77 #ifdef COMPAT_FREEBSD32
  78 #include <sys/mount.h>
  79 #include <compat/freebsd32/freebsd32.h>
  80
  81 struct if_data32 {
  82         uint8_t ifi_type;
  83         uint8_t ifi_physical;
  84         uint8_t ifi_addrlen;
  85         uint8_t ifi_hdrlen;
  86         uint8_t ifi_link_state;
  87         uint8_t ifi_vhid;
  88         uint8_t ifi_spare_char2;
  89         uint8_t ifi_datalen;
  90         uint32_t ifi_mtu;
  91         uint32_t ifi_metric;
  92         uint32_t ifi_baudrate;
  93         uint32_t ifi_ipackets;
  94         uint32_t ifi_ierrors;
  95         uint32_t ifi_opackets;
  96         uint32_t ifi_oerrors;
  97         uint32_t ifi_collisions;
  98         uint32_t ifi_ibytes;
  99         uint32_t ifi_obytes;
 100         uint32_t ifi_imcasts;
 101         uint32_t ifi_omcasts;
 102         uint32_t ifi_iqdrops;
 103         uint32_t ifi_noproto;
 104         uint32_t ifi_hwassist;
 105         int32_t ifi_epoch;
 106         struct  timeval32 ifi_lastchange;
 107 };
 108
 109 struct if_msghdr32 {
 110         uint16_t ifm_msglen;
 111         uint8_t ifm_version;
 112         uint8_t ifm_type;
 113         int32_t ifm_addrs;
 114         int32_t ifm_flags;
 115         uint16_t ifm_index;
 116         struct  if_data32 ifm_data;
 117 };
 118
 119 struct if_msghdrl32 {
 120         uint16_t ifm_msglen;
 121         uint8_t ifm_version;
 122         uint8_t ifm_type;
 123         int32_t ifm_addrs;
 124         int32_t ifm_flags;
 125         uint16_t ifm_index;
 126         uint16_t _ifm_spare1;
 127         uint16_t ifm_len;
 128         uint16_t ifm_data_off;
 129         struct  if_data32 ifm_data;
 130 };
 131
 132 struct ifa_msghdrl32 {
 133         uint16_t ifam_msglen;
 134         uint8_t ifam_version;
 135         uint8_t ifam_type;
 136         int32_t ifam_addrs;
 137         int32_t ifam_flags;
 138         uint16_t ifam_index;
 139         uint16_t _ifam_spare1;
 140         uint16_t ifam_len;
 141         uint16_t ifam_data_off;
 142         int32_t ifam_metric;
 143         struct  if_data32 ifam_data;
 144 };
 145 #endif /* COMPAT_FREEBSD32 */
 146
 147 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
 148
 149 /* NB: these are not modified */
 150 static struct   sockaddr route_src = { 2, PF_ROUTE, };
 151 static struct   sockaddr sa_zero   = { sizeof(sa_zero), AF_INET, };
 152
 153 /* These are external hooks for CARP. */
 154 int     (*carp_get_vhid_p)(struct ifaddr *);
 155
 156 /*
 157  * Used by rtsock/raw_input callback code to decide whether to filter the update
 158  * notification to a socket bound to a particular FIB.
 159  */
 160 #define RTS_FILTER_FIB  M_PROTO8
 161 #define RTS_ALLFIBS     -1
 162
 163 static struct {
 164         int     ip_count;       /* attached w/ AF_INET */
 165         int     ip6_count;      /* attached w/ AF_INET6 */
 166         int     ipx_count;      /* attached w/ AF_IPX */
 167         int     any_count;      /* total attached */
 168 } route_cb;
 169
 170 struct mtx rtsock_mtx;
 171 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
 172
 173 #define RTSOCK_LOCK()   mtx_lock(&rtsock_mtx)
 174 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
 175 #define RTSOCK_LOCK_ASSERT()    mtx_assert(&rtsock_mtx, MA_OWNED)
 176
 177 static SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
 178
 179 struct walkarg {
 180         int     w_tmemsize;
 181         int     w_op, w_arg;
 182         caddr_t w_tmem;
 183         struct sysctl_req *w_req;
 184 };
 185
 186 static void     rts_input(struct mbuf *m);
 187 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo);
 188 static int      rt_msg2(int type, struct rt_addrinfo *rtinfo,
 189                         caddr_t cp, struct walkarg *w);
 190 static int      rt_xaddrs(caddr_t cp, caddr_t cplim,
 191                         struct rt_addrinfo *rtinfo);
 192 static int      sysctl_dumpentry(struct radix_node *rn, void *vw);
 193 static int      sysctl_iflist(int af, struct walkarg *w);
 194 static int      sysctl_ifmalist(int af, struct walkarg *w);
 195 static int      route_output(struct mbuf *m, struct socket *so);
 196 static void     rt_setmetrics(u_long which, const struct rt_metrics *in,
 197                         struct rt_metrics_lite *out);
 198 static void     rt_getmetrics(const struct rt_metrics_lite *in,
 199                         struct rt_metrics *out);
 200 static void     rt_dispatch(struct mbuf *, sa_family_t);
 201
 202 static struct netisr_handler rtsock_nh = {
 203         .nh_name = "rtsock",
 204         .nh_handler = rts_input,
 205         .nh_proto = NETISR_ROUTE,
 206         .nh_policy = NETISR_POLICY_SOURCE,
 207 };
 208
 209 static int
 210 sysctl_route_netisr_maxqlen(SYSCTL_HANDLER_ARGS)
 211 {
 212         int error, qlimit;
 213
 214         netisr_getqlimit(&rtsock_nh, &qlimit);
 215         error = sysctl_handle_int(oidp, &qlimit, 0, req);
 216         if (error || !req->newptr)
 217                 return (error);
 218         if (qlimit < 1)
 219                 return (EINVAL);
 220         return (netisr_setqlimit(&rtsock_nh, qlimit));
 221 }
 222 SYSCTL_PROC(_net_route, OID_AUTO, netisr_maxqlen, CTLTYPE_INT|CTLFLAG_RW,
 223     0, 0, sysctl_route_netisr_maxqlen, "I",
 224     "maximum routing socket dispatch queue length");
 225
 226 static void
 227 rts_init(void)
 228 {
 229         int tmp;
 230
 231         if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
 232                 rtsock_nh.nh_qlimit = tmp;
 233         netisr_register(&rtsock_nh);
 234 }
 235 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0);
 236
 237 static int
 238 raw_input_rts_cb(struct mbuf *m, struct sockproto *proto, struct sockaddr *src,
 239     struct rawcb *rp)
 240 {
 241         int fibnum;
 242
 243         KASSERT(m != NULL, ("%s: m is NULL", __func__));
 244         KASSERT(proto != NULL, ("%s: proto is NULL", __func__));
 245         KASSERT(rp != NULL, ("%s: rp is NULL", __func__));
 246
 247         /* No filtering requested. */
 248         if ((m->m_flags & RTS_FILTER_FIB) == 0)
 249                 return (0);
 250
 251         /* Check if it is a rts and the fib matches the one of the socket. */
 252         fibnum = M_GETFIB(m);
 253         if (proto->sp_family != PF_ROUTE ||
 254             rp->rcb_socket == NULL ||
 255             rp->rcb_socket->so_fibnum == fibnum)
 256                 return (0);
 257
 258         /* Filtering requested and no match, the socket shall be skipped. */
 259         return (1);
 260 }
 261
 262 static void
 263 rts_input(struct mbuf *m)
 264 {
 265         struct sockproto route_proto;
 266         unsigned short *family;
 267         struct m_tag *tag;
 268
 269         route_proto.sp_family = PF_ROUTE;
 270         tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
 271         if (tag != NULL) {
 272                 family = (unsigned short *)(tag + 1);
 273                 route_proto.sp_protocol = *family;
 274                 m_tag_delete(m, tag);
 275         } else
 276                 route_proto.sp_protocol = 0;
 277
 278         raw_input_ext(m, &route_proto, &route_src, raw_input_rts_cb);
 279 }
 280
 281 /*
 282  * It really doesn't make any sense at all for this code to share much
 283  * with raw_usrreq.c, since its functionality is so restricted.  XXX
 284  */
 285 static void
 286 rts_abort(struct socket *so)
 287 {
 288
 289         raw_usrreqs.pru_abort(so);
 290 }
 291
 292 static void
 293 rts_close(struct socket *so)
 294 {
 295
 296         raw_usrreqs.pru_close(so);
 297 }
 298
 299 /* pru_accept is EOPNOTSUPP */
 300
 301 static int
 302 rts_attach(struct socket *so, int proto, struct thread *td)
 303 {
 304         struct rawcb *rp;
 305         int s, error;
 306
 307         KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
 308
 309         /* XXX */
 310         rp = malloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
 311         if (rp == NULL)
 312                 return ENOBUFS;
 313
 314         /*
 315          * The splnet() is necessary to block protocols from sending
 316          * error notifications (like RTM_REDIRECT or RTM_LOSING) while
 317          * this PCB is extant but incompletely initialized.
 318          * Probably we should try to do more of this work beforehand and
 319          * eliminate the spl.
 320          */
 321         s = splnet();
 322         so->so_pcb = (caddr_t)rp;
 323         so->so_fibnum = td->td_proc->p_fibnum;
 324         error = raw_attach(so, proto);
 325         rp = sotorawcb(so);
 326         if (error) {
 327                 splx(s);
 328                 so->so_pcb = NULL;
 329                 free(rp, M_PCB);
 330                 return error;
 331         }
 332         RTSOCK_LOCK();
 333         switch(rp->rcb_proto.sp_protocol) {
 334         case AF_INET:
 335                 route_cb.ip_count++;
 336                 break;
 337         case AF_INET6:
 338                 route_cb.ip6_count++;
 339                 break;
 340         case AF_IPX:
 341                 route_cb.ipx_count++;
 342                 break;
 343         }
 344         route_cb.any_count++;
 345         RTSOCK_UNLOCK();
 346         soisconnected(so);
 347         so->so_options |= SO_USELOOPBACK;
 348         splx(s);
 349         return 0;
 350 }
 351
 352 static int
 353 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 354 {
 355
 356         return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
 357 }
 358
 359 static int
 360 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 361 {
 362
 363         return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
 364 }
 365
 366 /* pru_connect2 is EOPNOTSUPP */
 367 /* pru_control is EOPNOTSUPP */
 368
 369 static void
 370 rts_detach(struct socket *so)
 371 {
 372         struct rawcb *rp = sotorawcb(so);
 373
 374         KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
 375
 376         RTSOCK_LOCK();
 377         switch(rp->rcb_proto.sp_protocol) {
 378         case AF_INET:
 379                 route_cb.ip_count--;
 380                 break;
 381         case AF_INET6:
 382                 route_cb.ip6_count--;
 383                 break;
 384         case AF_IPX:
 385                 route_cb.ipx_count--;
 386                 break;
 387         }
 388         route_cb.any_count--;
 389         RTSOCK_UNLOCK();
 390         raw_usrreqs.pru_detach(so);
 391 }
 392
 393 static int
 394 rts_disconnect(struct socket *so)
 395 {
 396
 397         return (raw_usrreqs.pru_disconnect(so));
 398 }
 399
 400 /* pru_listen is EOPNOTSUPP */
 401
 402 static int
 403 rts_peeraddr(struct socket *so, struct sockaddr **nam)
 404 {
 405
 406         return (raw_usrreqs.pru_peeraddr(so, nam));
 407 }
 408
 409 /* pru_rcvd is EOPNOTSUPP */
 410 /* pru_rcvoob is EOPNOTSUPP */
 411
 412 static int
 413 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 414          struct mbuf *control, struct thread *td)
 415 {
 416
 417         return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
 418 }
 419
 420 /* pru_sense is null */
 421
 422 static int
 423 rts_shutdown(struct socket *so)
 424 {
 425
 426         return (raw_usrreqs.pru_shutdown(so));
 427 }
 428
 429 static int
 430 rts_sockaddr(struct socket *so, struct sockaddr **nam)
 431 {
 432
 433         return (raw_usrreqs.pru_sockaddr(so, nam));
 434 }
 435
 436 static struct pr_usrreqs route_usrreqs = {
 437         .pru_abort =            rts_abort,
 438         .pru_attach =           rts_attach,
 439         .pru_bind =             rts_bind,
 440         .pru_connect =          rts_connect,
 441         .pru_detach =           rts_detach,
 442         .pru_disconnect =       rts_disconnect,
 443         .pru_peeraddr =         rts_peeraddr,
 444         .pru_send =             rts_send,
 445         .pru_shutdown =         rts_shutdown,
 446         .pru_sockaddr =         rts_sockaddr,
 447         .pru_close =            rts_close,
 448 };
 449
 450 #ifndef _SOCKADDR_UNION_DEFINED
 451 #define _SOCKADDR_UNION_DEFINED
 452 /*
 453  * The union of all possible address formats we handle.
 454  */
 455 union sockaddr_union {
 456         struct sockaddr         sa;
 457         struct sockaddr_in      sin;
 458         struct sockaddr_in6     sin6;
 459 };
 460 #endif /* _SOCKADDR_UNION_DEFINED */
 461
 462 static int
 463 rtm_get_jailed(struct rt_addrinfo *info, struct ifnet *ifp,
 464     struct rtentry *rt, union sockaddr_union *saun, struct ucred *cred)
 465 {
 466
 467         /* First, see if the returned address is part of the jail. */
 468         if (prison_if(cred, rt->rt_ifa->ifa_addr) == 0) {
 469                 info->rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
 470                 return (0);
 471         }
 472
 473         switch (info->rti_info[RTAX_DST]->sa_family) {
 474 #ifdef INET
 475         case AF_INET:
 476         {
 477                 struct in_addr ia;
 478                 struct ifaddr *ifa;
 479                 int found;
 480
 481                 found = 0;
 482                 /*
 483                  * Try to find an address on the given outgoing interface
 484                  * that belongs to the jail.
 485                  */
 486                 IF_ADDR_RLOCK(ifp);
 487                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 488                         struct sockaddr *sa;
 489                         sa = ifa->ifa_addr;
 490                         if (sa->sa_family != AF_INET)
 491                                 continue;
 492                         ia = ((struct sockaddr_in *)sa)->sin_addr;
 493                         if (prison_check_ip4(cred, &ia) == 0) {
 494                                 found = 1;
 495                                 break;
 496                         }
 497                 }
 498                 IF_ADDR_RUNLOCK(ifp);
 499                 if (!found) {
 500                         /*
 501                          * As a last resort return the 'default' jail address.
 502                          */
 503                         ia = ((struct sockaddr_in *)rt->rt_ifa->ifa_addr)->
 504                             sin_addr;
 505                         if (prison_get_ip4(cred, &ia) != 0)
 506                                 return (ESRCH);
 507                 }
 508                 bzero(&saun->sin, sizeof(struct sockaddr_in));
 509                 saun->sin.sin_len = sizeof(struct sockaddr_in);
 510                 saun->sin.sin_family = AF_INET;
 511                 saun->sin.sin_addr.s_addr = ia.s_addr;
 512                 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin;
 513                 break;
 514         }
 515 #endif
 516 #ifdef INET6
 517         case AF_INET6:
 518         {
 519                 struct in6_addr ia6;
 520                 struct ifaddr *ifa;
 521                 int found;
 522
 523                 found = 0;
 524                 /*
 525                  * Try to find an address on the given outgoing interface
 526                  * that belongs to the jail.
 527                  */
 528                 IF_ADDR_RLOCK(ifp);
 529                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 530                         struct sockaddr *sa;
 531                         sa = ifa->ifa_addr;
 532                         if (sa->sa_family != AF_INET6)
 533                                 continue;
 534                         bcopy(&((struct sockaddr_in6 *)sa)->sin6_addr,
 535                             &ia6, sizeof(struct in6_addr));
 536                         if (prison_check_ip6(cred, &ia6) == 0) {
 537                                 found = 1;
 538                                 break;
 539                         }
 540                 }
 541                 IF_ADDR_RUNLOCK(ifp);
 542                 if (!found) {
 543                         /*
 544                          * As a last resort return the 'default' jail address.
 545                          */
 546                         ia6 = ((struct sockaddr_in6 *)rt->rt_ifa->ifa_addr)->
 547                             sin6_addr;
 548                         if (prison_get_ip6(cred, &ia6) != 0)
 549                                 return (ESRCH);
 550                 }
 551                 bzero(&saun->sin6, sizeof(struct sockaddr_in6));
 552                 saun->sin6.sin6_len = sizeof(struct sockaddr_in6);
 553                 saun->sin6.sin6_family = AF_INET6;
 554                 bcopy(&ia6, &saun->sin6.sin6_addr, sizeof(struct in6_addr));
 555                 if (sa6_recoverscope(&saun->sin6) != 0)
 556                         return (ESRCH);
 557                 info->rti_info[RTAX_IFA] = (struct sockaddr *)&saun->sin6;
 558                 break;
 559         }
 560 #endif
 561         default:
 562                 return (ESRCH);
 563         }
 564         return (0);
 565 }
 566
 567 /*ARGSUSED*/
 568 static int
 569 route_output(struct mbuf *m, struct socket *so)
 570 {
 571 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0)
 572         struct rt_msghdr *rtm = NULL;
 573         struct rtentry *rt = NULL;
 574         struct radix_node_head *rnh;
 575         struct rt_addrinfo info;
 576         int len, error = 0;
 577         struct ifnet *ifp = NULL;
 578         union sockaddr_union saun;
 579         sa_family_t saf = AF_UNSPEC;
 580
 581 #define senderr(e) { error = e; goto flush;}
 582         if (m == NULL || ((m->m_len < sizeof(long)) &&
 583                        (m = m_pullup(m, sizeof(long))) == NULL))
 584                 return (ENOBUFS);
 585         if ((m->m_flags & M_PKTHDR) == 0)
 586                 panic("route_output");
 587         len = m->m_pkthdr.len;
 588         if (len < sizeof(*rtm) ||
 589             len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
 590                 info.rti_info[RTAX_DST] = NULL;
 591                 senderr(EINVAL);
 592         }
 593         R_Malloc(rtm, struct rt_msghdr *, len);
 594         if (rtm == NULL) {
 595                 info.rti_info[RTAX_DST] = NULL;
 596                 senderr(ENOBUFS);
 597         }
 598         m_copydata(m, 0, len, (caddr_t)rtm);
 599         if (rtm->rtm_version != RTM_VERSION) {
 600                 info.rti_info[RTAX_DST] = NULL;
 601                 senderr(EPROTONOSUPPORT);
 602         }
 603         rtm->rtm_pid = curproc->p_pid;
 604         bzero(&info, sizeof(info));
 605         info.rti_addrs = rtm->rtm_addrs;
 606         if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
 607                 info.rti_info[RTAX_DST] = NULL;
 608                 senderr(EINVAL);
 609         }
 610         info.rti_flags = rtm->rtm_flags;
 611         if (info.rti_info[RTAX_DST] == NULL ||
 612             info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
 613             (info.rti_info[RTAX_GATEWAY] != NULL &&
 614              info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
 615                 senderr(EINVAL);
 616         saf = info.rti_info[RTAX_DST]->sa_family;
 617         /*
 618          * Verify that the caller has the appropriate privilege; RTM_GET
 619          * is the only operation the non-superuser is allowed.
 620          */
 621         if (rtm->rtm_type != RTM_GET) {
 622                 error = priv_check(curthread, PRIV_NET_ROUTE);
 623                 if (error)
 624                         senderr(error);
 625         }
 626
 627         /*
 628          * The given gateway address may be an interface address.
 629          * For example, issuing a "route change" command on a route
 630          * entry that was created from a tunnel, and the gateway
 631          * address given is the local end point. In this case the
 632          * RTF_GATEWAY flag must be cleared or the destination will
 633          * not be reachable even though there is no error message.
 634          */
 635         if (info.rti_info[RTAX_GATEWAY] != NULL &&
 636             info.rti_info[RTAX_GATEWAY]->sa_family != AF_LINK) {
 637                 struct route gw_ro;
 638
 639                 bzero(&gw_ro, sizeof(gw_ro));
 640                 gw_ro.ro_dst = *info.rti_info[RTAX_GATEWAY];
 641                 rtalloc_ign_fib(&gw_ro, 0, so->so_fibnum);
 642                 /*
 643                  * A host route through the loopback interface is
 644                  * installed for each interface adddress. In pre 8.0
 645                  * releases the interface address of a PPP link type
 646                  * is not reachable locally. This behavior is fixed as
 647                  * part of the new L2/L3 redesign and rewrite work. The
 648                  * signature of this interface address route is the
 649                  * AF_LINK sa_family type of the rt_gateway, and the
 650                  * rt_ifp has the IFF_LOOPBACK flag set.
 651                  */
 652                 if (gw_ro.ro_rt != NULL &&
 653                     gw_ro.ro_rt->rt_gateway->sa_family == AF_LINK &&
 654                     gw_ro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)
 655                         info.rti_flags &= ~RTF_GATEWAY;
 656                 if (gw_ro.ro_rt != NULL)
 657                         RTFREE(gw_ro.ro_rt);
 658         }
 659
 660         switch (rtm->rtm_type) {
 661                 struct rtentry *saved_nrt;
 662
 663         case RTM_ADD:
 664                 if (info.rti_info[RTAX_GATEWAY] == NULL)
 665                         senderr(EINVAL);
 666                 saved_nrt = NULL;
 667
 668                 /* support for new ARP code */
 669                 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK &&
 670                     (rtm->rtm_flags & RTF_LLDATA) != 0) {
 671                         error = lla_rt_output(rtm, &info);
 672                         break;
 673                 }
 674                 error = rtrequest1_fib(RTM_ADD, &info, &saved_nrt,
 675                     so->so_fibnum);
 676                 if (error == 0 && saved_nrt) {
 677                         RT_LOCK(saved_nrt);
 678                         rt_setmetrics(rtm->rtm_inits,
 679                                 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
 680                         rtm->rtm_index = saved_nrt->rt_ifp->if_index;
 681                         RT_REMREF(saved_nrt);
 682                         RT_UNLOCK(saved_nrt);
 683                 }
 684                 break;
 685
 686         case RTM_DELETE:
 687                 saved_nrt = NULL;
 688                 /* support for new ARP code */
 689                 if (info.rti_info[RTAX_GATEWAY] &&
 690                     (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) &&
 691                     (rtm->rtm_flags & RTF_LLDATA) != 0) {
 692                         error = lla_rt_output(rtm, &info);
 693                         break;
 694                 }
 695                 error = rtrequest1_fib(RTM_DELETE, &info, &saved_nrt,
 696                     so->so_fibnum);
 697                 if (error == 0) {
 698                         RT_LOCK(saved_nrt);
 699                         rt = saved_nrt;
 700                         goto report;
 701                 }
 702                 break;
 703
 704         case RTM_GET:
 705         case RTM_CHANGE:
 706         case RTM_LOCK:
 707                 rnh = rt_tables_get_rnh(so->so_fibnum,
 708                     info.rti_info[RTAX_DST]->sa_family);
 709                 if (rnh == NULL)
 710                         senderr(EAFNOSUPPORT);
 711                 RADIX_NODE_HEAD_RLOCK(rnh);
 712                 rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST],
 713                         info.rti_info[RTAX_NETMASK], rnh);
 714                 if (rt == NULL) {       /* XXX looks bogus */
 715                         RADIX_NODE_HEAD_RUNLOCK(rnh);
 716                         senderr(ESRCH);
 717                 }
 718 #ifdef RADIX_MPATH
 719                 /*
 720                  * for RTM_CHANGE/LOCK, if we got multipath routes,
 721                  * we require users to specify a matching RTAX_GATEWAY.
 722                  *
 723                  * for RTM_GET, gate is optional even with multipath.
 724                  * if gate == NULL the first match is returned.
 725                  * (no need to call rt_mpath_matchgate if gate == NULL)
 726                  */
 727                 if (rn_mpath_capable(rnh) &&
 728                     (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) {
 729                         rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]);
 730                         if (!rt) {
 731                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 732                                 senderr(ESRCH);
 733                         }
 734                 }
 735 #endif
 736                 /*
 737                  * If performing proxied L2 entry insertion, and
 738                  * the actual PPP host entry is found, perform
 739                  * another search to retrieve the prefix route of
 740                  * the local end point of the PPP link.
 741                  */
 742                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
 743                         struct sockaddr laddr;
 744
 745                         if (rt->rt_ifp != NULL &&
 746                             rt->rt_ifp->if_type == IFT_PROPVIRTUAL) {
 747                                 struct ifaddr *ifa;
 748
 749                                 ifa = ifa_ifwithnet(info.rti_info[RTAX_DST], 1);
 750                                 if (ifa != NULL)
 751                                         rt_maskedcopy(ifa->ifa_addr,
 752                                                       &laddr,
 753                                                       ifa->ifa_netmask);
 754                         } else
 755                                 rt_maskedcopy(rt->rt_ifa->ifa_addr,
 756                                               &laddr,
 757                                               rt->rt_ifa->ifa_netmask);
 758                         /*
 759                          * refactor rt and no lock operation necessary
 760                          */
 761                         rt = (struct rtentry *)rnh->rnh_matchaddr(&laddr, rnh);
 762                         if (rt == NULL) {
 763                                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 764                                 senderr(ESRCH);
 765                         }
 766                 }
 767                 RT_LOCK(rt);
 768                 RT_ADDREF(rt);
 769                 RADIX_NODE_HEAD_RUNLOCK(rnh);
 770
 771                 /*
 772                  * Fix for PR: 82974
 773                  *
 774                  * RTM_CHANGE/LOCK need a perfect match, rn_lookup()
 775                  * returns a perfect match in case a netmask is
 776                  * specified.  For host routes only a longest prefix
 777                  * match is returned so it is necessary to compare the
 778                  * existence of the netmask.  If both have a netmask
 779                  * rnh_lookup() did a perfect match and if none of them
 780                  * have a netmask both are host routes which is also a
 781                  * perfect match.
 782                  */
 783
 784                 if (rtm->rtm_type != RTM_GET &&
 785                     (!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) {
 786                         RT_UNLOCK(rt);
 787                         senderr(ESRCH);
 788                 }
 789
 790                 switch(rtm->rtm_type) {
 791
 792                 case RTM_GET:
 793                 report:
 794                         RT_LOCK_ASSERT(rt);
 795                         if ((rt->rt_flags & RTF_HOST) == 0
 796                             ? jailed_without_vnet(curthread->td_ucred)
 797                             : prison_if(curthread->td_ucred,
 798                             rt_key(rt)) != 0) {
 799                                 RT_UNLOCK(rt);
 800                                 senderr(ESRCH);
 801                         }
 802                         info.rti_info[RTAX_DST] = rt_key(rt);
 803                         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 804                         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
 805                         info.rti_info[RTAX_GENMASK] = 0;
 806                         if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
 807                                 ifp = rt->rt_ifp;
 808                                 if (ifp) {
 809                                         info.rti_info[RTAX_IFP] =
 810                                             ifp->if_addr->ifa_addr;
 811                                         error = rtm_get_jailed(&info, ifp, rt,
 812                                             &saun, curthread->td_ucred);
 813                                         if (error != 0) {
 814                                                 RT_UNLOCK(rt);
 815                                                 senderr(error);
 816                                         }
 817                                         if (ifp->if_flags & IFF_POINTOPOINT)
 818                                                 info.rti_info[RTAX_BRD] =
 819                                                     rt->rt_ifa->ifa_dstaddr;
 820                                         rtm->rtm_index = ifp->if_index;
 821                                 } else {
 822                                         info.rti_info[RTAX_IFP] = NULL;
 823                                         info.rti_info[RTAX_IFA] = NULL;
 824                                 }
 825                         } else if ((ifp = rt->rt_ifp) != NULL) {
 826                                 rtm->rtm_index = ifp->if_index;
 827                         }
 828                         len = rt_msg2(rtm->rtm_type, &info, NULL, NULL);
 829                         if (len > rtm->rtm_msglen) {
 830                                 struct rt_msghdr *new_rtm;
 831                                 R_Malloc(new_rtm, struct rt_msghdr *, len);
 832                                 if (new_rtm == NULL) {
 833                                         RT_UNLOCK(rt);
 834                                         senderr(ENOBUFS);
 835                                 }
 836                                 bcopy(rtm, new_rtm, rtm->rtm_msglen);
 837                                 Free(rtm); rtm = new_rtm;
 838                         }
 839                         (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL);
 840                         rtm->rtm_flags = rt->rt_flags;
 841                         rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
 842                         rtm->rtm_addrs = info.rti_addrs;
 843                         break;
 844
 845                 case RTM_CHANGE:
 846                         /*
 847                          * New gateway could require new ifaddr, ifp;
 848                          * flags may also be different; ifp may be specified
 849                          * by ll sockaddr when protocol address is ambiguous
 850                          */
 851                         if (((rt->rt_flags & RTF_GATEWAY) &&
 852                              info.rti_info[RTAX_GATEWAY] != NULL) ||
 853                             info.rti_info[RTAX_IFP] != NULL ||
 854                             (info.rti_info[RTAX_IFA] != NULL &&
 855                              !sa_equal(info.rti_info[RTAX_IFA],
 856                                        rt->rt_ifa->ifa_addr))) {
 857                                 RT_UNLOCK(rt);
 858                                 RADIX_NODE_HEAD_LOCK(rnh);
 859                                 error = rt_getifa_fib(&info, rt->rt_fibnum);
 860                                 /*
 861                                  * XXXRW: Really we should release this
 862                                  * reference later, but this maintains
 863                                  * historical behavior.
 864                                  */
 865                                 if (info.rti_ifa != NULL)
 866                                         ifa_free(info.rti_ifa);
 867                                 RADIX_NODE_HEAD_UNLOCK(rnh);
 868                                 if (error != 0)
 869                                         senderr(error);
 870                                 RT_LOCK(rt);
 871                         }
 872                         if (info.rti_ifa != NULL &&
 873                             info.rti_ifa != rt->rt_ifa &&
 874                             rt->rt_ifa != NULL &&
 875                             rt->rt_ifa->ifa_rtrequest != NULL) {
 876                                 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt,
 877                                     &info);
 878                                 ifa_free(rt->rt_ifa);
 879                         }
 880                         if (info.rti_info[RTAX_GATEWAY] != NULL) {
 881                                 RT_UNLOCK(rt);
 882                                 RADIX_NODE_HEAD_LOCK(rnh);
 883                                 RT_LOCK(rt);
 884
 885                                 error = rt_setgate(rt, rt_key(rt),
 886                                     info.rti_info[RTAX_GATEWAY]);
 887                                 RADIX_NODE_HEAD_UNLOCK(rnh);
 888                                 if (error != 0) {
 889                                         RT_UNLOCK(rt);
 890                                         senderr(error);
 891                                 }
 892                                 rt->rt_flags |= (RTF_GATEWAY & info.rti_flags);
 893                         }
 894                         if (info.rti_ifa != NULL &&
 895                             info.rti_ifa != rt->rt_ifa) {
 896                                 ifa_ref(info.rti_ifa);
 897                                 rt->rt_ifa = info.rti_ifa;
 898                                 rt->rt_ifp = info.rti_ifp;
 899                         }
 900                         /* Allow some flags to be toggled on change. */
 901                         rt->rt_flags = (rt->rt_flags & ~RTF_FMASK) |
 902                                     (rtm->rtm_flags & RTF_FMASK);
 903                         rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
 904                                         &rt->rt_rmx);
 905                         rtm->rtm_index = rt->rt_ifp->if_index;
 906                         if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
 907                                rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
 908                         /* FALLTHROUGH */
 909                 case RTM_LOCK:
 910                         /* We don't support locks anymore */
 911                         break;
 912                 }
 913                 RT_UNLOCK(rt);
 914                 break;
 915
 916         default:
 917                 senderr(EOPNOTSUPP);
 918         }
 919
 920 flush:
 921         if (rtm) {
 922                 if (error)
 923                         rtm->rtm_errno = error;
 924                 else
 925                         rtm->rtm_flags |= RTF_DONE;
 926         }
 927         if (rt)         /* XXX can this be true? */
 928                 RTFREE(rt);
 929     {
 930         struct rawcb *rp = NULL;
 931         /*
 932          * Check to see if we don't want our own messages.
 933          */
 934         if ((so->so_options & SO_USELOOPBACK) == 0) {
 935                 if (route_cb.any_count <= 1) {
 936                         if (rtm)
 937                                 Free(rtm);
 938                         m_freem(m);
 939                         return (error);
 940                 }
 941                 /* There is another listener, so construct message */
 942                 rp = sotorawcb(so);
 943         }
 944         if (rtm) {
 945                 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
 946                 if (m->m_pkthdr.len < rtm->rtm_msglen) {
 947                         m_freem(m);
 948                         m = NULL;
 949                 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
 950                         m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
 951         }
 952         if (m) {
 953                 M_SETFIB(m, so->so_fibnum);
 954                 m->m_flags |= RTS_FILTER_FIB;
 955                 if (rp) {
 956                         /*
 957                          * XXX insure we don't get a copy by
 958                          * invalidating our protocol
 959                          */
 960                         unsigned short family = rp->rcb_proto.sp_family;
 961                         rp->rcb_proto.sp_family = 0;
 962                         rt_dispatch(m, saf);
 963                         rp->rcb_proto.sp_family = family;
 964                 } else
 965                         rt_dispatch(m, saf);
 966         }
 967         /* info.rti_info[RTAX_DST] (used above) can point inside of rtm */
 968         if (rtm)
 969                 Free(rtm);
 970     }
 971         return (error);
 972 #undef  sa_equal
 973 }
 974
 975 static void
 976 rt_setmetrics(u_long which, const struct rt_metrics *in,
 977         struct rt_metrics_lite *out)
 978 {
 979 #define metric(f, e) if (which & (f)) out->e = in->e;
 980         /*
 981          * Only these are stored in the routing entry since introduction
 982          * of tcp hostcache. The rest is ignored.
 983          */
 984         metric(RTV_MTU, rmx_mtu);
 985         metric(RTV_WEIGHT, rmx_weight);
 986         /* Userland -> kernel timebase conversion. */
 987         if (which & RTV_EXPIRE)
 988                 out->rmx_expire = in->rmx_expire ?
 989                     in->rmx_expire - time_second + time_uptime : 0;
 990 #undef metric
 991 }
 992
 993 static void
 994 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out)
 995 {
 996 #define metric(e) out->e = in->e;
 997         bzero(out, sizeof(*out));
 998         metric(rmx_mtu);
 999         metric(rmx_weight);
1000         /* Kernel -> userland timebase conversion. */
1001         out->rmx_expire = in->rmx_expire ?
1002             in->rmx_expire - time_uptime + time_second : 0;
1003 #undef metric
1004 }
1005
1006 /*
1007  * Extract the addresses of the passed sockaddrs.
1008  * Do a little sanity checking so as to avoid bad memory references.
1009  * This data is derived straight from userland.
1010  */
1011 static int
1012 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
1013 {
1014         struct sockaddr *sa;
1015         int i;
1016
1017         for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
1018                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
1019                         continue;
1020                 sa = (struct sockaddr *)cp;
1021                 /*
1022                  * It won't fit.
1023                  */
1024                 if (cp + sa->sa_len > cplim)
1025                         return (EINVAL);
1026                 /*
1027                  * there are no more.. quit now
1028                  * If there are more bits, they are in error.
1029                  * I've seen this. route(1) can evidently generate these.
1030                  * This causes kernel to core dump.
1031                  * for compatibility, If we see this, point to a safe address.
1032                  */
1033                 if (sa->sa_len == 0) {
1034                         rtinfo->rti_info[i] = &sa_zero;
1035                         return (0); /* should be EINVAL but for compat */
1036                 }
1037                 /* accept it */
1038                 rtinfo->rti_info[i] = sa;
1039                 cp += SA_SIZE(sa);
1040         }
1041         return (0);
1042 }
1043
1044 /*
1045  * Used by the routing socket.
1046  */
1047 static struct mbuf *
1048 rt_msg1(int type, struct rt_addrinfo *rtinfo)
1049 {
1050         struct rt_msghdr *rtm;
1051         struct mbuf *m;
1052         int i;
1053         struct sockaddr *sa;
1054         int len, dlen;
1055
1056         switch (type) {
1057
1058         case RTM_DELADDR:
1059         case RTM_NEWADDR:
1060                 len = sizeof(struct ifa_msghdr);
1061                 break;
1062
1063         case RTM_DELMADDR:
1064         case RTM_NEWMADDR:
1065                 len = sizeof(struct ifma_msghdr);
1066                 break;
1067
1068         case RTM_IFINFO:
1069                 len = sizeof(struct if_msghdr);
1070                 break;
1071
1072         case RTM_IFANNOUNCE:
1073         case RTM_IEEE80211:
1074                 len = sizeof(struct if_announcemsghdr);
1075                 break;
1076
1077         default:
1078                 len = sizeof(struct rt_msghdr);
1079         }
1080         if (len > MCLBYTES)
1081                 panic("rt_msg1");
1082         m = m_gethdr(M_DONTWAIT, MT_DATA);
1083         if (m && len > MHLEN) {
1084                 MCLGET(m, M_DONTWAIT);
1085                 if ((m->m_flags & M_EXT) == 0) {
1086                         m_free(m);
1087                         m = NULL;
1088                 }
1089         }
1090         if (m == NULL)
1091                 return (m);
1092         m->m_pkthdr.len = m->m_len = len;
1093         m->m_pkthdr.rcvif = NULL;
1094         rtm = mtod(m, struct rt_msghdr *);
1095         bzero((caddr_t)rtm, len);
1096         for (i = 0; i < RTAX_MAX; i++) {
1097                 if ((sa = rtinfo->rti_info[i]) == NULL)
1098                         continue;
1099                 rtinfo->rti_addrs |= (1 << i);
1100                 dlen = SA_SIZE(sa);
1101                 m_copyback(m, len, dlen, (caddr_t)sa);
1102                 len += dlen;
1103         }
1104         if (m->m_pkthdr.len != len) {
1105                 m_freem(m);
1106                 return (NULL);
1107         }
1108         rtm->rtm_msglen = len;
1109         rtm->rtm_version = RTM_VERSION;
1110         rtm->rtm_type = type;
1111         return (m);
1112 }
1113
1114 /*
1115  * Used by the sysctl code and routing socket.
1116  */
1117 static int
1118 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
1119 {
1120         int i;
1121         int len, dlen, second_time = 0;
1122         caddr_t cp0;
1123
1124         rtinfo->rti_addrs = 0;
1125 again:
1126         switch (type) {
1127
1128         case RTM_DELADDR:
1129         case RTM_NEWADDR:
1130                 if (w != NULL && w->w_op == NET_RT_IFLISTL) {
1131 #ifdef COMPAT_FREEBSD32
1132                         if (w->w_req->flags & SCTL_MASK32)
1133                                 len = sizeof(struct ifa_msghdrl32);
1134                         else
1135 #endif
1136                                 len = sizeof(struct ifa_msghdrl);
1137                 } else
1138                         len = sizeof(struct ifa_msghdr);
1139                 break;
1140
1141         case RTM_IFINFO:
1142 #ifdef COMPAT_FREEBSD32
1143                 if (w != NULL && w->w_req->flags & SCTL_MASK32) {
1144                         if (w->w_op == NET_RT_IFLISTL)
1145                                 len = sizeof(struct if_msghdrl32);
1146                         else
1147                                 len = sizeof(struct if_msghdr32);
1148                         break;
1149                 }
1150 #endif
1151                 if (w != NULL && w->w_op == NET_RT_IFLISTL)
1152                         len = sizeof(struct if_msghdrl);
1153                 else
1154                         len = sizeof(struct if_msghdr);
1155                 break;
1156
1157         case RTM_NEWMADDR:
1158                 len = sizeof(struct ifma_msghdr);
1159                 break;
1160
1161         default:
1162                 len = sizeof(struct rt_msghdr);
1163         }
1164         cp0 = cp;
1165         if (cp0)
1166                 cp += len;
1167         for (i = 0; i < RTAX_MAX; i++) {
1168                 struct sockaddr *sa;
1169
1170                 if ((sa = rtinfo->rti_info[i]) == NULL)
1171                         continue;
1172                 rtinfo->rti_addrs |= (1 << i);
1173                 dlen = SA_SIZE(sa);
1174                 if (cp) {
1175                         bcopy((caddr_t)sa, cp, (unsigned)dlen);
1176                         cp += dlen;
1177                 }
1178                 len += dlen;
1179         }
1180         len = ALIGN(len);
1181         if (cp == NULL && w != NULL && !second_time) {
1182                 struct walkarg *rw = w;
1183
1184                 if (rw->w_req) {
1185                         if (rw->w_tmemsize < len) {
1186                                 if (rw->w_tmem)
1187                                         free(rw->w_tmem, M_RTABLE);
1188                                 rw->w_tmem = (caddr_t)
1189                                         malloc(len, M_RTABLE, M_NOWAIT);
1190                                 if (rw->w_tmem)
1191                                         rw->w_tmemsize = len;
1192                         }
1193                         if (rw->w_tmem) {
1194                                 cp = rw->w_tmem;
1195                                 second_time = 1;
1196                                 goto again;
1197                         }
1198                 }
1199         }
1200         if (cp) {
1201                 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
1202
1203                 rtm->rtm_version = RTM_VERSION;
1204                 rtm->rtm_type = type;
1205                 rtm->rtm_msglen = len;
1206         }
1207         return (len);
1208 }
1209
1210 /*
1211  * This routine is called to generate a message from the routing
1212  * socket indicating that a redirect has occured, a routing lookup
1213  * has failed, or that a protocol has detected timeouts to a particular
1214  * destination.
1215  */
1216 void
1217 rt_missmsg_fib(int type, struct rt_addrinfo *rtinfo, int flags, int error,
1218     int fibnum)
1219 {
1220         struct rt_msghdr *rtm;
1221         struct mbuf *m;
1222         struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
1223
1224         if (route_cb.any_count == 0)
1225                 return;
1226         m = rt_msg1(type, rtinfo);
1227         if (m == NULL)
1228                 return;
1229
1230         if (fibnum != RTS_ALLFIBS) {
1231                 KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: fibnum out "
1232                     "of range 0 <= %d < %d", __func__, fibnum, rt_numfibs));
1233                 M_SETFIB(m, fibnum);
1234                 m->m_flags |= RTS_FILTER_FIB;
1235         }
1236
1237         rtm = mtod(m, struct rt_msghdr *);
1238         rtm->rtm_flags = RTF_DONE | flags;
1239         rtm->rtm_errno = error;
1240         rtm->rtm_addrs = rtinfo->rti_addrs;
1241         rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1242 }
1243
1244 void
1245 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
1246 {
1247
1248         rt_missmsg_fib(type, rtinfo, flags, error, RTS_ALLFIBS);
1249 }
1250
1251 /*
1252  * This routine is called to generate a message from the routing
1253  * socket indicating that the status of a network interface has changed.
1254  */
1255 void
1256 rt_ifmsg(struct ifnet *ifp)
1257 {
1258         struct if_msghdr *ifm;
1259         struct mbuf *m;
1260         struct rt_addrinfo info;
1261
1262         if (route_cb.any_count == 0)
1263                 return;
1264         bzero((caddr_t)&info, sizeof(info));
1265         m = rt_msg1(RTM_IFINFO, &info);
1266         if (m == NULL)
1267                 return;
1268         ifm = mtod(m, struct if_msghdr *);
1269         ifm->ifm_index = ifp->if_index;
1270         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1271         ifm->ifm_data = ifp->if_data;
1272         ifm->ifm_addrs = 0;
1273         rt_dispatch(m, AF_UNSPEC);
1274 }
1275
1276 /*
1277  * This is called to generate messages from the routing socket
1278  * indicating a network interface has had addresses associated with it.
1279  * if we ever reverse the logic and replace messages TO the routing
1280  * socket indicate a request to configure interfaces, then it will
1281  * be unnecessary as the routing socket will automatically generate
1282  * copies of it.
1283  */
1284 void
1285 rt_newaddrmsg_fib(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt,
1286     int fibnum)
1287 {
1288         struct rt_addrinfo info;
1289         struct sockaddr *sa = NULL;
1290         int pass;
1291         struct mbuf *m = NULL;
1292         struct ifnet *ifp = ifa->ifa_ifp;
1293
1294         KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
1295                 ("unexpected cmd %u", cmd));
1296 #if defined(INET) || defined(INET6)
1297 #ifdef SCTP
1298         /*
1299          * notify the SCTP stack
1300          * this will only get called when an address is added/deleted
1301          * XXX pass the ifaddr struct instead if ifa->ifa_addr...
1302          */
1303         sctp_addr_change(ifa, cmd);
1304 #endif /* SCTP */
1305 #endif
1306         if (route_cb.any_count == 0)
1307                 return;
1308         for (pass = 1; pass < 3; pass++) {
1309                 bzero((caddr_t)&info, sizeof(info));
1310                 if ((cmd == RTM_ADD && pass == 1) ||
1311                     (cmd == RTM_DELETE && pass == 2)) {
1312                         struct ifa_msghdr *ifam;
1313                         int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
1314
1315                         info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
1316                         info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
1317                         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1318                         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1319                         if ((m = rt_msg1(ncmd, &info)) == NULL)
1320                                 continue;
1321                         ifam = mtod(m, struct ifa_msghdr *);
1322                         ifam->ifam_index = ifp->if_index;
1323                         ifam->ifam_metric = ifa->ifa_metric;
1324                         ifam->ifam_flags = ifa->ifa_flags;
1325                         ifam->ifam_addrs = info.rti_addrs;
1326                 }
1327                 if ((cmd == RTM_ADD && pass == 2) ||
1328                     (cmd == RTM_DELETE && pass == 1)) {
1329                         struct rt_msghdr *rtm;
1330
1331                         if (rt == NULL)
1332                                 continue;
1333                         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1334                         info.rti_info[RTAX_DST] = sa = rt_key(rt);
1335                         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1336                         if ((m = rt_msg1(cmd, &info)) == NULL)
1337                                 continue;
1338                         rtm = mtod(m, struct rt_msghdr *);
1339                         rtm->rtm_index = ifp->if_index;
1340                         rtm->rtm_flags |= rt->rt_flags;
1341                         rtm->rtm_errno = error;
1342                         rtm->rtm_addrs = info.rti_addrs;
1343                 }
1344                 if (fibnum != RTS_ALLFIBS) {
1345                         KASSERT(fibnum >= 0 && fibnum < rt_numfibs, ("%s: "
1346                             "fibnum out of range 0 <= %d < %d", __func__,
1347                              fibnum, rt_numfibs));
1348                         M_SETFIB(m, fibnum);
1349                         m->m_flags |= RTS_FILTER_FIB;
1350                 }
1351                 rt_dispatch(m, sa ? sa->sa_family : AF_UNSPEC);
1352         }
1353 }
1354
1355 void
1356 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
1357 {
1358
1359         rt_newaddrmsg_fib(cmd, ifa, error, rt, RTS_ALLFIBS);
1360 }
1361
1362 /*
1363  * This is the analogue to the rt_newaddrmsg which performs the same
1364  * function but for multicast group memberhips.  This is easier since
1365  * there is no route state to worry about.
1366  */
1367 void
1368 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
1369 {
1370         struct rt_addrinfo info;
1371         struct mbuf *m = NULL;
1372         struct ifnet *ifp = ifma->ifma_ifp;
1373         struct ifma_msghdr *ifmam;
1374
1375         if (route_cb.any_count == 0)
1376                 return;
1377
1378         bzero((caddr_t)&info, sizeof(info));
1379         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1380         info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
1381         /*
1382          * If a link-layer address is present, present it as a ``gateway''
1383          * (similarly to how ARP entries, e.g., are presented).
1384          */
1385         info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
1386         m = rt_msg1(cmd, &info);
1387         if (m == NULL)
1388                 return;
1389         ifmam = mtod(m, struct ifma_msghdr *);
1390         KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
1391             __func__));
1392         ifmam->ifmam_index = ifp->if_index;
1393         ifmam->ifmam_addrs = info.rti_addrs;
1394         rt_dispatch(m, ifma->ifma_addr ? ifma->ifma_addr->sa_family : AF_UNSPEC);
1395 }
1396
1397 static struct mbuf *
1398 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
1399         struct rt_addrinfo *info)
1400 {
1401         struct if_announcemsghdr *ifan;
1402         struct mbuf *m;
1403
1404         if (route_cb.any_count == 0)
1405                 return NULL;
1406         bzero((caddr_t)info, sizeof(*info));
1407         m = rt_msg1(type, info);
1408         if (m != NULL) {
1409                 ifan = mtod(m, struct if_announcemsghdr *);
1410                 ifan->ifan_index = ifp->if_index;
1411                 strlcpy(ifan->ifan_name, ifp->if_xname,
1412                         sizeof(ifan->ifan_name));
1413                 ifan->ifan_what = what;
1414         }
1415         return m;
1416 }
1417
1418 /*
1419  * This is called to generate routing socket messages indicating
1420  * IEEE80211 wireless events.
1421  * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1422  */
1423 void
1424 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1425 {
1426         struct mbuf *m;
1427         struct rt_addrinfo info;
1428
1429         m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1430         if (m != NULL) {
1431                 /*
1432                  * Append the ieee80211 data.  Try to stick it in the
1433                  * mbuf containing the ifannounce msg; otherwise allocate
1434                  * a new mbuf and append.
1435                  *
1436                  * NB: we assume m is a single mbuf.
1437                  */
1438                 if (data_len > M_TRAILINGSPACE(m)) {
1439                         struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
1440                         if (n == NULL) {
1441                                 m_freem(m);
1442                                 return;
1443                         }
1444                         bcopy(data, mtod(n, void *), data_len);
1445                         n->m_len = data_len;
1446                         m->m_next = n;
1447                 } else if (data_len > 0) {
1448                         bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1449                         m->m_len += data_len;
1450                 }
1451                 if (m->m_flags & M_PKTHDR)
1452                         m->m_pkthdr.len += data_len;
1453                 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1454                 rt_dispatch(m, AF_UNSPEC);
1455         }
1456 }
1457
1458 /*
1459  * This is called to generate routing socket messages indicating
1460  * network interface arrival and departure.
1461  */
1462 void
1463 rt_ifannouncemsg(struct ifnet *ifp, int what)
1464 {
1465         struct mbuf *m;
1466         struct rt_addrinfo info;
1467
1468         m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
1469         if (m != NULL)
1470                 rt_dispatch(m, AF_UNSPEC);
1471 }
1472
1473 static void
1474 rt_dispatch(struct mbuf *m, sa_family_t saf)
1475 {
1476         struct m_tag *tag;
1477
1478         /*
1479          * Preserve the family from the sockaddr, if any, in an m_tag for
1480          * use when injecting the mbuf into the routing socket buffer from
1481          * the netisr.
1482          */
1483         if (saf != AF_UNSPEC) {
1484                 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
1485                     M_NOWAIT);
1486                 if (tag == NULL) {
1487                         m_freem(m);
1488                         return;
1489                 }
1490                 *(unsigned short *)(tag + 1) = saf;
1491                 m_tag_prepend(m, tag);
1492         }
1493 #ifdef VIMAGE
1494         if (V_loif)
1495                 m->m_pkthdr.rcvif = V_loif;
1496         else {
1497                 m_freem(m);
1498                 return;
1499         }
1500 #endif
1501         netisr_queue(NETISR_ROUTE, m);  /* mbuf is free'd on failure. */
1502 }
1503
1504 /*
1505  * This is used in dumping the kernel table via sysctl().
1506  */
1507 static int
1508 sysctl_dumpentry(struct radix_node *rn, void *vw)
1509 {
1510         struct walkarg *w = vw;
1511         struct rtentry *rt = (struct rtentry *)rn;
1512         int error = 0, size;
1513         struct rt_addrinfo info;
1514
1515         if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1516                 return 0;
1517         if ((rt->rt_flags & RTF_HOST) == 0
1518             ? jailed_without_vnet(w->w_req->td->td_ucred)
1519             : prison_if(w->w_req->td->td_ucred, rt_key(rt)) != 0)
1520                 return (0);
1521         bzero((caddr_t)&info, sizeof(info));
1522         info.rti_info[RTAX_DST] = rt_key(rt);
1523         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1524         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1525         info.rti_info[RTAX_GENMASK] = 0;
1526         if (rt->rt_ifp) {
1527                 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
1528                 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
1529                 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1530                         info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
1531         }
1532         size = rt_msg2(RTM_GET, &info, NULL, w);
1533         if (w->w_req && w->w_tmem) {
1534                 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1535
1536                 rtm->rtm_flags = rt->rt_flags;
1537                 /*
1538                  * let's be honest about this being a retarded hack
1539                  */
1540                 rtm->rtm_fmask = rt->rt_rmx.rmx_pksent;
1541                 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
1542                 rtm->rtm_index = rt->rt_ifp->if_index;
1543                 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1544                 rtm->rtm_addrs = info.rti_addrs;
1545                 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1546                 return (error);
1547         }
1548         return (error);
1549 }
1550
1551 #ifdef COMPAT_FREEBSD32
1552 static void
1553 copy_ifdata32(struct if_data *src, struct if_data32 *dst)
1554 {
1555
1556         bzero(dst, sizeof(*dst));
1557         CP(*src, *dst, ifi_type);
1558         CP(*src, *dst, ifi_physical);
1559         CP(*src, *dst, ifi_addrlen);
1560         CP(*src, *dst, ifi_hdrlen);
1561         CP(*src, *dst, ifi_link_state);
1562         CP(*src, *dst, ifi_vhid);
1563         dst->ifi_datalen = sizeof(struct if_data32);
1564         CP(*src, *dst, ifi_mtu);
1565         CP(*src, *dst, ifi_metric);
1566         CP(*src, *dst, ifi_baudrate);
1567         CP(*src, *dst, ifi_ipackets);
1568         CP(*src, *dst, ifi_ierrors);
1569         CP(*src, *dst, ifi_opackets);
1570         CP(*src, *dst, ifi_oerrors);
1571         CP(*src, *dst, ifi_collisions);
1572         CP(*src, *dst, ifi_ibytes);
1573         CP(*src, *dst, ifi_obytes);
1574         CP(*src, *dst, ifi_imcasts);
1575         CP(*src, *dst, ifi_omcasts);
1576         CP(*src, *dst, ifi_iqdrops);
1577         CP(*src, *dst, ifi_noproto);
1578         CP(*src, *dst, ifi_hwassist);
1579         CP(*src, *dst, ifi_epoch);
1580         TV_CP(*src, *dst, ifi_lastchange);
1581 }
1582 #endif
1583
1584 static int
1585 sysctl_iflist_ifml(struct ifnet *ifp, struct rt_addrinfo *info,
1586     struct walkarg *w, int len)
1587 {
1588         struct if_msghdrl *ifm;
1589
1590 #ifdef COMPAT_FREEBSD32
1591         if (w->w_req->flags & SCTL_MASK32) {
1592                 struct if_msghdrl32 *ifm32;
1593
1594                 ifm32 = (struct if_msghdrl32 *)w->w_tmem;
1595                 ifm32->ifm_addrs = info->rti_addrs;
1596                 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1597                 ifm32->ifm_index = ifp->if_index;
1598                 ifm32->_ifm_spare1 = 0;
1599                 ifm32->ifm_len = sizeof(*ifm32);
1600                 ifm32->ifm_data_off = offsetof(struct if_msghdrl32, ifm_data);
1601
1602                 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1603                 /* Fixup if_data carp(4) vhid. */
1604                 if (carp_get_vhid_p != NULL)
1605                         ifm32->ifm_data.ifi_vhid =
1606                             (*carp_get_vhid_p)(ifp->if_addr);
1607
1608                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1609         }
1610 #endif
1611         ifm = (struct if_msghdrl *)w->w_tmem;
1612         ifm->ifm_addrs = info->rti_addrs;
1613         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1614         ifm->ifm_index = ifp->if_index;
1615         ifm->_ifm_spare1 = 0;
1616         ifm->ifm_len = sizeof(*ifm);
1617         ifm->ifm_data_off = offsetof(struct if_msghdrl, ifm_data);
1618
1619         ifm->ifm_data = ifp->if_data;
1620         /* Fixup if_data carp(4) vhid. */
1621         if (carp_get_vhid_p != NULL)
1622                 ifm->ifm_data.ifi_vhid = (*carp_get_vhid_p)(ifp->if_addr);
1623
1624         return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1625 }
1626
1627 static int
1628 sysctl_iflist_ifm(struct ifnet *ifp, struct rt_addrinfo *info,
1629     struct walkarg *w, int len)
1630 {
1631         struct if_msghdr *ifm;
1632
1633 #ifdef COMPAT_FREEBSD32
1634         if (w->w_req->flags & SCTL_MASK32) {
1635                 struct if_msghdr32 *ifm32;
1636
1637                 ifm32 = (struct if_msghdr32 *)w->w_tmem;
1638                 ifm32->ifm_addrs = info->rti_addrs;
1639                 ifm32->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1640                 ifm32->ifm_index = ifp->if_index;
1641
1642                 copy_ifdata32(&ifp->if_data, &ifm32->ifm_data);
1643                 /* Fixup if_data carp(4) vhid. */
1644                 if (carp_get_vhid_p != NULL)
1645                         ifm32->ifm_data.ifi_vhid =
1646                             (*carp_get_vhid_p)(ifp->if_addr);
1647
1648                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifm32, len));
1649         }
1650 #endif
1651         ifm = (struct if_msghdr *)w->w_tmem;
1652         ifm->ifm_addrs = info->rti_addrs;
1653         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1654         ifm->ifm_index = ifp->if_index;
1655
1656         ifm->ifm_data = ifp->if_data;
1657         /* Fixup if_data carp(4) vhid. */
1658         if (carp_get_vhid_p != NULL)
1659                 ifm->ifm_data.ifi_vhid = (*carp_get_vhid_p)(ifp->if_addr);
1660
1661         return (SYSCTL_OUT(w->w_req, (caddr_t)ifm, len));
1662 }
1663
1664 static int
1665 sysctl_iflist_ifaml(struct ifaddr *ifa, struct rt_addrinfo *info,
1666     struct walkarg *w, int len)
1667 {
1668         struct ifa_msghdrl *ifam;
1669
1670 #ifdef COMPAT_FREEBSD32
1671         if (w->w_req->flags & SCTL_MASK32) {
1672                 struct ifa_msghdrl32 *ifam32;
1673
1674                 ifam32 = (struct ifa_msghdrl32 *)w->w_tmem;
1675                 ifam32->ifam_addrs = info->rti_addrs;
1676                 ifam32->ifam_flags = ifa->ifa_flags;
1677                 ifam32->ifam_index = ifa->ifa_ifp->if_index;
1678                 ifam32->_ifam_spare1 = 0;
1679                 ifam32->ifam_len = sizeof(*ifam32);
1680                 ifam32->ifam_data_off =
1681                     offsetof(struct ifa_msghdrl32, ifam_data);
1682                 ifam32->ifam_metric = ifa->ifa_metric;
1683
1684                 copy_ifdata32(&ifa->ifa_ifp->if_data, &ifam32->ifam_data);
1685                 /* Fixup if_data carp(4) vhid. */
1686                 if (carp_get_vhid_p != NULL)
1687                         ifam32->ifam_data.ifi_vhid = (*carp_get_vhid_p)(ifa);
1688
1689                 return (SYSCTL_OUT(w->w_req, (caddr_t)ifam32, len));
1690         }
1691 #endif
1692
1693         ifam = (struct ifa_msghdrl *)w->w_tmem;
1694         ifam->ifam_addrs = info->rti_addrs;
1695         ifam->ifam_flags = ifa->ifa_flags;
1696         ifam->ifam_index = ifa->ifa_ifp->if_index;
1697         ifam->_ifam_spare1 = 0;
1698         ifam->ifam_len = sizeof(*ifam);
1699         ifam->ifam_data_off = offsetof(struct ifa_msghdrl, ifam_data);
1700         ifam->ifam_metric = ifa->ifa_metric;
1701
1702         ifam->ifam_data = ifa->if_data;
1703         /* Fixup if_data carp(4) vhid. */
1704         if (carp_get_vhid_p != NULL)
1705                 ifam->ifam_data.ifi_vhid = (*carp_get_vhid_p)(ifa);
1706
1707         return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1708 }
1709
1710 static int
1711 sysctl_iflist_ifam(struct ifaddr *ifa, struct rt_addrinfo *info,
1712     struct walkarg *w, int len)
1713 {
1714         struct ifa_msghdr *ifam;
1715
1716         ifam = (struct ifa_msghdr *)w->w_tmem;
1717         ifam->ifam_addrs = info->rti_addrs;
1718         ifam->ifam_flags = ifa->ifa_flags;
1719         ifam->ifam_index = ifa->ifa_ifp->if_index;
1720         ifam->ifam_metric = ifa->ifa_metric;
1721
1722         return (SYSCTL_OUT(w->w_req, w->w_tmem, len));
1723 }
1724
1725 static int
1726 sysctl_iflist(int af, struct walkarg *w)
1727 {
1728         struct ifnet *ifp;
1729         struct ifaddr *ifa;
1730         struct rt_addrinfo info;
1731         int len, error = 0;
1732
1733         bzero((caddr_t)&info, sizeof(info));
1734         IFNET_RLOCK();
1735         TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1736                 if (w->w_arg && w->w_arg != ifp->if_index)
1737                         continue;
1738                 IF_ADDR_RLOCK(ifp);
1739                 ifa = ifp->if_addr;
1740                 info.rti_info[RTAX_IFP] = ifa->ifa_addr;
1741                 len = rt_msg2(RTM_IFINFO, &info, NULL, w);
1742                 info.rti_info[RTAX_IFP] = NULL;
1743                 if (w->w_req && w->w_tmem) {
1744                         if (w->w_op == NET_RT_IFLISTL)
1745                                 error = sysctl_iflist_ifml(ifp, &info, w, len);
1746                         else
1747                                 error = sysctl_iflist_ifm(ifp, &info, w, len);
1748                         if (error)
1749                                 goto done;
1750                 }
1751                 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1752                         if (af && af != ifa->ifa_addr->sa_family)
1753                                 continue;
1754                         if (prison_if(w->w_req->td->td_ucred,
1755                             ifa->ifa_addr) != 0)
1756                                 continue;
1757                         info.rti_info[RTAX_IFA] = ifa->ifa_addr;
1758                         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1759                         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1760                         len = rt_msg2(RTM_NEWADDR, &info, NULL, w);
1761                         if (w->w_req && w->w_tmem) {
1762                                 if (w->w_op == NET_RT_IFLISTL)
1763                                         error = sysctl_iflist_ifaml(ifa, &info,
1764                                             w, len);
1765                                 else
1766                                         error = sysctl_iflist_ifam(ifa, &info,
1767                                             w, len);
1768                                 if (error)
1769                                         goto done;
1770                         }
1771                 }
1772                 IF_ADDR_RUNLOCK(ifp);
1773                 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] =
1774                         info.rti_info[RTAX_BRD] = NULL;
1775         }
1776 done:
1777         if (ifp != NULL)
1778                 IF_ADDR_RUNLOCK(ifp);
1779         IFNET_RUNLOCK();
1780         return (error);
1781 }
1782
1783 static int
1784 sysctl_ifmalist(int af, struct walkarg *w)
1785 {
1786         struct ifnet *ifp;
1787         struct ifmultiaddr *ifma;
1788         struct  rt_addrinfo info;
1789         int     len, error = 0;
1790         struct ifaddr *ifa;
1791
1792         bzero((caddr_t)&info, sizeof(info));
1793         IFNET_RLOCK();
1794         TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1795                 if (w->w_arg && w->w_arg != ifp->if_index)
1796                         continue;
1797                 ifa = ifp->if_addr;
1798                 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
1799                 IF_ADDR_RLOCK(ifp);
1800                 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1801                         if (af && af != ifma->ifma_addr->sa_family)
1802                                 continue;
1803                         if (prison_if(w->w_req->td->td_ucred,
1804                             ifma->ifma_addr) != 0)
1805                                 continue;
1806                         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1807                         info.rti_info[RTAX_GATEWAY] =
1808                             (ifma->ifma_addr->sa_family != AF_LINK) ?
1809                             ifma->ifma_lladdr : NULL;
1810                         len = rt_msg2(RTM_NEWMADDR, &info, NULL, w);
1811                         if (w->w_req && w->w_tmem) {
1812                                 struct ifma_msghdr *ifmam;
1813
1814                                 ifmam = (struct ifma_msghdr *)w->w_tmem;
1815                                 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1816                                 ifmam->ifmam_flags = 0;
1817                                 ifmam->ifmam_addrs = info.rti_addrs;
1818                                 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1819                                 if (error) {
1820                                         IF_ADDR_RUNLOCK(ifp);
1821                                         goto done;
1822                                 }
1823                         }
1824                 }
1825                 IF_ADDR_RUNLOCK(ifp);
1826         }
1827 done:
1828         IFNET_RUNLOCK();
1829         return (error);
1830 }
1831
1832 static int
1833 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1834 {
1835         int     *name = (int *)arg1;
1836         u_int   namelen = arg2;
1837         struct radix_node_head *rnh = NULL; /* silence compiler. */
1838         int     i, lim, error = EINVAL;
1839         u_char  af;
1840         struct  walkarg w;
1841
1842         name ++;
1843         namelen--;
1844         if (req->newptr)
1845                 return (EPERM);
1846         if (namelen != 3)
1847                 return ((namelen < 3) ? EISDIR : ENOTDIR);
1848         af = name[0];
1849         if (af > AF_MAX)
1850                 return (EINVAL);
1851         bzero(&w, sizeof(w));
1852         w.w_op = name[1];
1853         w.w_arg = name[2];
1854         w.w_req = req;
1855
1856         error = sysctl_wire_old_buffer(req, 0);
1857         if (error)
1858                 return (error);
1859         switch (w.w_op) {
1860
1861         case NET_RT_DUMP:
1862         case NET_RT_FLAGS:
1863                 if (af == 0) {                  /* dump all tables */
1864                         i = 1;
1865                         lim = AF_MAX;
1866                 } else                          /* dump only one table */
1867                         i = lim = af;
1868
1869                 /*
1870                  * take care of llinfo entries, the caller must
1871                  * specify an AF
1872                  */
1873                 if (w.w_op == NET_RT_FLAGS &&
1874                     (w.w_arg == 0 || w.w_arg & RTF_LLINFO)) {
1875                         if (af != 0)
1876                                 error = lltable_sysctl_dumparp(af, w.w_req);
1877                         else
1878                                 error = EINVAL;
1879                         break;
1880                 }
1881                 /*
1882                  * take care of routing entries
1883                  */
1884                 for (error = 0; error == 0 && i <= lim; i++) {
1885                         rnh = rt_tables_get_rnh(req->td->td_proc->p_fibnum, i);
1886                         if (rnh != NULL) {
1887                                 RADIX_NODE_HEAD_LOCK(rnh);
1888                                 error = rnh->rnh_walktree(rnh,
1889                                     sysctl_dumpentry, &w);
1890                                 RADIX_NODE_HEAD_UNLOCK(rnh);
1891                         } else if (af != 0)
1892                                 error = EAFNOSUPPORT;
1893                 }
1894                 break;
1895
1896         case NET_RT_IFLIST:
1897         case NET_RT_IFLISTL:
1898                 error = sysctl_iflist(af, &w);
1899                 break;
1900
1901         case NET_RT_IFMALIST:
1902                 error = sysctl_ifmalist(af, &w);
1903                 break;
1904         }
1905         if (w.w_tmem)
1906                 free(w.w_tmem, M_RTABLE);
1907         return (error);
1908 }
1909
1910 static SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1911
1912 /*
1913  * Definitions of protocols supported in the ROUTE domain.
1914  */
1915
1916 static struct domain routedomain;               /* or at least forward */
1917
1918 static struct protosw routesw[] = {
1919 {
1920         .pr_type =              SOCK_RAW,
1921         .pr_domain =            &routedomain,
1922         .pr_flags =             PR_ATOMIC|PR_ADDR,
1923         .pr_output =            route_output,
1924         .pr_ctlinput =          raw_ctlinput,
1925         .pr_init =              raw_init,
1926         .pr_usrreqs =           &route_usrreqs
1927 }
1928 };
1929
1930 static struct domain routedomain = {
1931         .dom_family =           PF_ROUTE,
1932         .dom_name =              "route",
1933         .dom_protosw =          routesw,
1934         .dom_protoswNPROTOSW =  &routesw[sizeof(routesw)/sizeof(routesw[0])]
1935 };
1936
1937 VNET_DOMAIN_SET(route);