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_sctp.h"
  33 #include <sys/param.h>
  34 #include <sys/domain.h>
  35 #include <sys/kernel.h>
  36 #include <sys/jail.h>
  37 #include <sys/malloc.h>
  38 #include <sys/mbuf.h>
  39 #include <sys/priv.h>
  40 #include <sys/proc.h>
  41 #include <sys/protosw.h>
  42 #include <sys/signalvar.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/systm.h>
  47
  48 #include <net/if.h>
  49 #include <net/netisr.h>
  50 #include <net/raw_cb.h>
  51 #include <net/route.h>
  52
  53 #include <netinet/in.h>
  54
  55 #ifdef SCTP
  56 extern void sctp_addr_change(struct ifaddr *ifa, int cmd);
  57 #endif /* SCTP */
  58
  59 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables");
  60
  61 /* NB: these are not modified */
  62 static struct   sockaddr route_dst = { 2, PF_ROUTE, };
  63 static struct   sockaddr route_src = { 2, PF_ROUTE, };
  64 static struct   sockaddr sa_zero   = { sizeof(sa_zero), AF_INET, };
  65
  66 static struct {
  67         int     ip_count;       /* attached w/ AF_INET */
  68         int     ip6_count;      /* attached w/ AF_INET6 */
  69         int     ipx_count;      /* attached w/ AF_IPX */
  70         int     any_count;      /* total attached */
  71 } route_cb;
  72
  73 struct mtx rtsock_mtx;
  74 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF);
  75
  76 #define RTSOCK_LOCK()   mtx_lock(&rtsock_mtx)
  77 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx)
  78 #define RTSOCK_LOCK_ASSERT()    mtx_assert(&rtsock_mtx, MA_OWNED)
  79
  80 static struct   ifqueue rtsintrq;
  81
  82 SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, "");
  83 SYSCTL_INT(_net_route, OID_AUTO, netisr_maxqlen, CTLFLAG_RW,
  84     &rtsintrq.ifq_maxlen, 0, "maximum routing socket dispatch queue length");
  85
  86 struct walkarg {
  87         int     w_tmemsize;
  88         int     w_op, w_arg;
  89         caddr_t w_tmem;
  90         struct sysctl_req *w_req;
  91 };
  92
  93 static void     rts_input(struct mbuf *m);
  94 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo);
  95 static int      rt_msg2(int type, struct rt_addrinfo *rtinfo,
  96                         caddr_t cp, struct walkarg *w);
  97 static int      rt_xaddrs(caddr_t cp, caddr_t cplim,
  98                         struct rt_addrinfo *rtinfo);
  99 static int      sysctl_dumpentry(struct radix_node *rn, void *vw);
 100 static int      sysctl_iflist(int af, struct walkarg *w);
 101 static int      sysctl_ifmalist(int af, struct walkarg *w);
 102 static int      route_output(struct mbuf *m, struct socket *so);
 103 static void     rt_setmetrics(u_long which, const struct rt_metrics *in,
 104                         struct rt_metrics_lite *out);
 105 static void     rt_getmetrics(const struct rt_metrics_lite *in,
 106                         struct rt_metrics *out);
 107 static void     rt_dispatch(struct mbuf *, const struct sockaddr *);
 108
 109 static void
 110 rts_init(void)
 111 {
 112         int tmp;
 113
 114         rtsintrq.ifq_maxlen = 256;
 115         if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp))
 116                 rtsintrq.ifq_maxlen = tmp;
 117         mtx_init(&rtsintrq.ifq_mtx, "rts_inq", NULL, MTX_DEF);
 118         netisr_register(NETISR_ROUTE, rts_input, &rtsintrq, NETISR_MPSAFE);
 119 }
 120 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0)
 121
 122 static void
 123 rts_input(struct mbuf *m)
 124 {
 125         struct sockproto route_proto;
 126         unsigned short *family;
 127         struct m_tag *tag;
 128
 129         route_proto.sp_family = PF_ROUTE;
 130         tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL);
 131         if (tag != NULL) {
 132                 family = (unsigned short *)(tag + 1);
 133                 route_proto.sp_protocol = *family;
 134                 m_tag_delete(m, tag);
 135         } else
 136                 route_proto.sp_protocol = 0;
 137
 138         raw_input(m, &route_proto, &route_src, &route_dst);
 139 }
 140
 141 /*
 142  * It really doesn't make any sense at all for this code to share much
 143  * with raw_usrreq.c, since its functionality is so restricted.  XXX
 144  */
 145 static void
 146 rts_abort(struct socket *so)
 147 {
 148
 149         raw_usrreqs.pru_abort(so);
 150 }
 151
 152 static void
 153 rts_close(struct socket *so)
 154 {
 155
 156         raw_usrreqs.pru_close(so);
 157 }
 158
 159 /* pru_accept is EOPNOTSUPP */
 160
 161 static int
 162 rts_attach(struct socket *so, int proto, struct thread *td)
 163 {
 164         struct rawcb *rp;
 165         int s, error;
 166
 167         KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL"));
 168
 169         /* XXX */
 170         MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO);
 171         if (rp == NULL)
 172                 return ENOBUFS;
 173
 174         /*
 175          * The splnet() is necessary to block protocols from sending
 176          * error notifications (like RTM_REDIRECT or RTM_LOSING) while
 177          * this PCB is extant but incompletely initialized.
 178          * Probably we should try to do more of this work beforehand and
 179          * eliminate the spl.
 180          */
 181         s = splnet();
 182         so->so_pcb = (caddr_t)rp;
 183         error = raw_attach(so, proto);
 184         rp = sotorawcb(so);
 185         if (error) {
 186                 splx(s);
 187                 so->so_pcb = NULL;
 188                 free(rp, M_PCB);
 189                 return error;
 190         }
 191         RTSOCK_LOCK();
 192         switch(rp->rcb_proto.sp_protocol) {
 193         case AF_INET:
 194                 route_cb.ip_count++;
 195                 break;
 196         case AF_INET6:
 197                 route_cb.ip6_count++;
 198                 break;
 199         case AF_IPX:
 200                 route_cb.ipx_count++;
 201                 break;
 202         }
 203         rp->rcb_faddr = &route_src;
 204         route_cb.any_count++;
 205         RTSOCK_UNLOCK();
 206         soisconnected(so);
 207         so->so_options |= SO_USELOOPBACK;
 208         splx(s);
 209         return 0;
 210 }
 211
 212 static int
 213 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 214 {
 215
 216         return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */
 217 }
 218
 219 static int
 220 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 221 {
 222
 223         return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */
 224 }
 225
 226 /* pru_connect2 is EOPNOTSUPP */
 227 /* pru_control is EOPNOTSUPP */
 228
 229 static void
 230 rts_detach(struct socket *so)
 231 {
 232         struct rawcb *rp = sotorawcb(so);
 233
 234         KASSERT(rp != NULL, ("rts_detach: rp == NULL"));
 235
 236         RTSOCK_LOCK();
 237         switch(rp->rcb_proto.sp_protocol) {
 238         case AF_INET:
 239                 route_cb.ip_count--;
 240                 break;
 241         case AF_INET6:
 242                 route_cb.ip6_count--;
 243                 break;
 244         case AF_IPX:
 245                 route_cb.ipx_count--;
 246                 break;
 247         }
 248         route_cb.any_count--;
 249         RTSOCK_UNLOCK();
 250         raw_usrreqs.pru_detach(so);
 251 }
 252
 253 static int
 254 rts_disconnect(struct socket *so)
 255 {
 256
 257         return (raw_usrreqs.pru_disconnect(so));
 258 }
 259
 260 /* pru_listen is EOPNOTSUPP */
 261
 262 static int
 263 rts_peeraddr(struct socket *so, struct sockaddr **nam)
 264 {
 265
 266         return (raw_usrreqs.pru_peeraddr(so, nam));
 267 }
 268
 269 /* pru_rcvd is EOPNOTSUPP */
 270 /* pru_rcvoob is EOPNOTSUPP */
 271
 272 static int
 273 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 274          struct mbuf *control, struct thread *td)
 275 {
 276
 277         return (raw_usrreqs.pru_send(so, flags, m, nam, control, td));
 278 }
 279
 280 /* pru_sense is null */
 281
 282 static int
 283 rts_shutdown(struct socket *so)
 284 {
 285
 286         return (raw_usrreqs.pru_shutdown(so));
 287 }
 288
 289 static int
 290 rts_sockaddr(struct socket *so, struct sockaddr **nam)
 291 {
 292
 293         return (raw_usrreqs.pru_sockaddr(so, nam));
 294 }
 295
 296 static struct pr_usrreqs route_usrreqs = {
 297         .pru_abort =            rts_abort,
 298         .pru_attach =           rts_attach,
 299         .pru_bind =             rts_bind,
 300         .pru_connect =          rts_connect,
 301         .pru_detach =           rts_detach,
 302         .pru_disconnect =       rts_disconnect,
 303         .pru_peeraddr =         rts_peeraddr,
 304         .pru_send =             rts_send,
 305         .pru_shutdown =         rts_shutdown,
 306         .pru_sockaddr =         rts_sockaddr,
 307         .pru_close =            rts_close,
 308 };
 309
 310 /*ARGSUSED*/
 311 static int
 312 route_output(struct mbuf *m, struct socket *so)
 313 {
 314 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0)
 315         struct rt_msghdr *rtm = NULL;
 316         struct rtentry *rt = NULL;
 317         struct radix_node_head *rnh;
 318         struct rt_addrinfo info;
 319         int len, error = 0;
 320         struct ifnet *ifp = NULL;
 321         struct sockaddr_in jail;
 322
 323 #define senderr(e) { error = e; goto flush;}
 324         if (m == NULL || ((m->m_len < sizeof(long)) &&
 325                        (m = m_pullup(m, sizeof(long))) == NULL))
 326                 return (ENOBUFS);
 327         if ((m->m_flags & M_PKTHDR) == 0)
 328                 panic("route_output");
 329         len = m->m_pkthdr.len;
 330         if (len < sizeof(*rtm) ||
 331             len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
 332                 info.rti_info[RTAX_DST] = NULL;
 333                 senderr(EINVAL);
 334         }
 335         R_Malloc(rtm, struct rt_msghdr *, len);
 336         if (rtm == NULL) {
 337                 info.rti_info[RTAX_DST] = NULL;
 338                 senderr(ENOBUFS);
 339         }
 340         m_copydata(m, 0, len, (caddr_t)rtm);
 341         if (rtm->rtm_version != RTM_VERSION) {
 342                 info.rti_info[RTAX_DST] = NULL;
 343                 senderr(EPROTONOSUPPORT);
 344         }
 345         rtm->rtm_pid = curproc->p_pid;
 346         bzero(&info, sizeof(info));
 347         info.rti_addrs = rtm->rtm_addrs;
 348         if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
 349                 info.rti_info[RTAX_DST] = NULL;
 350                 senderr(EINVAL);
 351         }
 352         info.rti_flags = rtm->rtm_flags;
 353         if (info.rti_info[RTAX_DST] == NULL ||
 354             info.rti_info[RTAX_DST]->sa_family >= AF_MAX ||
 355             (info.rti_info[RTAX_GATEWAY] != NULL &&
 356              info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX))
 357                 senderr(EINVAL);
 358         if (info.rti_info[RTAX_GENMASK]) {
 359                 struct radix_node *t;
 360                 t = rn_addmask((caddr_t) info.rti_info[RTAX_GENMASK], 0, 1);
 361                 if (t != NULL &&
 362                     bcmp((char *)(void *)info.rti_info[RTAX_GENMASK] + 1,
 363                     (char *)(void *)t->rn_key + 1,
 364                     ((struct sockaddr *)t->rn_key)->sa_len - 1) == 0)
 365                         info.rti_info[RTAX_GENMASK] =
 366                             (struct sockaddr *)t->rn_key;
 367                 else
 368                         senderr(ENOBUFS);
 369         }
 370
 371         /*
 372          * Verify that the caller has the appropriate privilege; RTM_GET
 373          * is the only operation the non-superuser is allowed.
 374          */
 375         if (rtm->rtm_type != RTM_GET) {
 376                 error = priv_check(curthread, PRIV_NET_ROUTE);
 377                 if (error)
 378                         senderr(error);
 379         }
 380
 381         switch (rtm->rtm_type) {
 382                 struct rtentry *saved_nrt;
 383
 384         case RTM_ADD:
 385                 if (info.rti_info[RTAX_GATEWAY] == NULL)
 386                         senderr(EINVAL);
 387                 saved_nrt = NULL;
 388                 error = rtrequest1(RTM_ADD, &info, &saved_nrt);
 389                 if (error == 0 && saved_nrt) {
 390                         RT_LOCK(saved_nrt);
 391                         rt_setmetrics(rtm->rtm_inits,
 392                                 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
 393                         rtm->rtm_index = saved_nrt->rt_ifp->if_index;
 394                         RT_REMREF(saved_nrt);
 395                         saved_nrt->rt_genmask = info.rti_info[RTAX_GENMASK];
 396                         RT_UNLOCK(saved_nrt);
 397                 }
 398                 break;
 399
 400         case RTM_DELETE:
 401                 saved_nrt = NULL;
 402                 error = rtrequest1(RTM_DELETE, &info, &saved_nrt);
 403                 if (error == 0) {
 404                         RT_LOCK(saved_nrt);
 405                         rt = saved_nrt;
 406                         goto report;
 407                 }
 408                 break;
 409
 410         case RTM_GET:
 411         case RTM_CHANGE:
 412         case RTM_LOCK:
 413                 rnh = rt_tables[info.rti_info[RTAX_DST]->sa_family];
 414                 if (rnh == NULL)
 415                         senderr(EAFNOSUPPORT);
 416                 RADIX_NODE_HEAD_LOCK(rnh);
 417                 rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST],
 418                         info.rti_info[RTAX_NETMASK], rnh);
 419                 if (rt == NULL) {       /* XXX looks bogus */
 420                         RADIX_NODE_HEAD_UNLOCK(rnh);
 421                         senderr(ESRCH);
 422                 }
 423                 RT_LOCK(rt);
 424                 RT_ADDREF(rt);
 425                 RADIX_NODE_HEAD_UNLOCK(rnh);
 426
 427                 /*
 428                  * Fix for PR: 82974
 429                  *
 430                  * RTM_CHANGE/LOCK need a perfect match, rn_lookup()
 431                  * returns a perfect match in case a netmask is
 432                  * specified.  For host routes only a longest prefix
 433                  * match is returned so it is necessary to compare the
 434                  * existence of the netmask.  If both have a netmask
 435                  * rnh_lookup() did a perfect match and if none of them
 436                  * have a netmask both are host routes which is also a
 437                  * perfect match.
 438                  */
 439
 440                 if (rtm->rtm_type != RTM_GET &&
 441                     (!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) {
 442                         RT_UNLOCK(rt);
 443                         senderr(ESRCH);
 444                 }
 445
 446                 switch(rtm->rtm_type) {
 447
 448                 case RTM_GET:
 449                 report:
 450                         RT_LOCK_ASSERT(rt);
 451                         info.rti_info[RTAX_DST] = rt_key(rt);
 452                         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 453                         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
 454                         info.rti_info[RTAX_GENMASK] = rt->rt_genmask;
 455                         if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
 456                                 ifp = rt->rt_ifp;
 457                                 if (ifp) {
 458                                         info.rti_info[RTAX_IFP] =
 459                                             ifp->if_addr->ifa_addr;
 460                                         if (jailed(so->so_cred)) {
 461                                                 bzero(&jail, sizeof(jail));
 462                                                 jail.sin_family = PF_INET;
 463                                                 jail.sin_len = sizeof(jail);
 464                                                 jail.sin_addr.s_addr =
 465                                                 htonl(prison_getip(so->so_cred));
 466                                                 info.rti_info[RTAX_IFA] =
 467                                                     (struct sockaddr *)&jail;
 468                                         } else
 469                                                 info.rti_info[RTAX_IFA] =
 470                                                     rt->rt_ifa->ifa_addr;
 471                                         if (ifp->if_flags & IFF_POINTOPOINT)
 472                                                 info.rti_info[RTAX_BRD] =
 473                                                     rt->rt_ifa->ifa_dstaddr;
 474                                         rtm->rtm_index = ifp->if_index;
 475                                 } else {
 476                                         info.rti_info[RTAX_IFP] = NULL;
 477                                         info.rti_info[RTAX_IFA] = NULL;
 478                                 }
 479                         } else if ((ifp = rt->rt_ifp) != NULL) {
 480                                 rtm->rtm_index = ifp->if_index;
 481                         }
 482                         len = rt_msg2(rtm->rtm_type, &info, NULL, NULL);
 483                         if (len > rtm->rtm_msglen) {
 484                                 struct rt_msghdr *new_rtm;
 485                                 R_Malloc(new_rtm, struct rt_msghdr *, len);
 486                                 if (new_rtm == NULL) {
 487                                         RT_UNLOCK(rt);
 488                                         senderr(ENOBUFS);
 489                                 }
 490                                 bcopy(rtm, new_rtm, rtm->rtm_msglen);
 491                                 Free(rtm); rtm = new_rtm;
 492                         }
 493                         (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL);
 494                         rtm->rtm_flags = rt->rt_flags;
 495                         rtm->rtm_use = 0;
 496                         rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
 497                         rtm->rtm_addrs = info.rti_addrs;
 498                         break;
 499
 500                 case RTM_CHANGE:
 501                         /*
 502                          * New gateway could require new ifaddr, ifp;
 503                          * flags may also be different; ifp may be specified
 504                          * by ll sockaddr when protocol address is ambiguous
 505                          */
 506                         if (((rt->rt_flags & RTF_GATEWAY) &&
 507                              info.rti_info[RTAX_GATEWAY] != NULL) ||
 508                             info.rti_info[RTAX_IFP] != NULL ||
 509                             (info.rti_info[RTAX_IFA] != NULL &&
 510                              !sa_equal(info.rti_info[RTAX_IFA],
 511                                        rt->rt_ifa->ifa_addr))) {
 512                                 RT_UNLOCK(rt);
 513                                 if ((error = rt_getifa(&info)) != 0)
 514                                         senderr(error);
 515                                 RT_LOCK(rt);
 516                         }
 517                         if (info.rti_ifa != NULL &&
 518                             info.rti_ifa != rt->rt_ifa &&
 519                             rt->rt_ifa != NULL &&
 520                             rt->rt_ifa->ifa_rtrequest != NULL) {
 521                                 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt,
 522                                     &info);
 523                                 IFAFREE(rt->rt_ifa);
 524                         }
 525                         if (info.rti_info[RTAX_GATEWAY] != NULL) {
 526                                 if ((error = rt_setgate(rt, rt_key(rt),
 527                                         info.rti_info[RTAX_GATEWAY])) != 0) {
 528                                         RT_UNLOCK(rt);
 529                                         senderr(error);
 530                                 }
 531                                 rt->rt_flags |= RTF_GATEWAY;
 532                         }
 533                         if (info.rti_ifa != NULL &&
 534                             info.rti_ifa != rt->rt_ifa) {
 535                                 IFAREF(info.rti_ifa);
 536                                 rt->rt_ifa = info.rti_ifa;
 537                                 rt->rt_ifp = info.rti_ifp;
 538                         }
 539                         /* Allow some flags to be toggled on change. */
 540                         if (rtm->rtm_fmask & RTF_FMASK)
 541                                 rt->rt_flags = (rt->rt_flags &
 542                                     ~rtm->rtm_fmask) |
 543                                     (rtm->rtm_flags & rtm->rtm_fmask);
 544                         rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
 545                                         &rt->rt_rmx);
 546                         rtm->rtm_index = rt->rt_ifp->if_index;
 547                         if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
 548                                rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
 549                         if (info.rti_info[RTAX_GENMASK])
 550                                 rt->rt_genmask = info.rti_info[RTAX_GENMASK];
 551                         /* FALLTHROUGH */
 552                 case RTM_LOCK:
 553                         /* We don't support locks anymore */
 554                         break;
 555                 }
 556                 RT_UNLOCK(rt);
 557                 break;
 558
 559         default:
 560                 senderr(EOPNOTSUPP);
 561         }
 562
 563 flush:
 564         if (rtm) {
 565                 if (error)
 566                         rtm->rtm_errno = error;
 567                 else
 568                         rtm->rtm_flags |= RTF_DONE;
 569         }
 570         if (rt)         /* XXX can this be true? */
 571                 RTFREE(rt);
 572     {
 573         struct rawcb *rp = NULL;
 574         /*
 575          * Check to see if we don't want our own messages.
 576          */
 577         if ((so->so_options & SO_USELOOPBACK) == 0) {
 578                 if (route_cb.any_count <= 1) {
 579                         if (rtm)
 580                                 Free(rtm);
 581                         m_freem(m);
 582                         return (error);
 583                 }
 584                 /* There is another listener, so construct message */
 585                 rp = sotorawcb(so);
 586         }
 587         if (rtm) {
 588                 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
 589                 if (m->m_pkthdr.len < rtm->rtm_msglen) {
 590                         m_freem(m);
 591                         m = NULL;
 592                 } else if (m->m_pkthdr.len > rtm->rtm_msglen)
 593                         m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len);
 594                 Free(rtm);
 595         }
 596         if (m) {
 597                 if (rp) {
 598                         /*
 599                          * XXX insure we don't get a copy by
 600                          * invalidating our protocol
 601                          */
 602                         unsigned short family = rp->rcb_proto.sp_family;
 603                         rp->rcb_proto.sp_family = 0;
 604                         rt_dispatch(m, info.rti_info[RTAX_DST]);
 605                         rp->rcb_proto.sp_family = family;
 606                 } else
 607                         rt_dispatch(m, info.rti_info[RTAX_DST]);
 608         }
 609     }
 610         return (error);
 611 #undef  sa_equal
 612 }
 613
 614 static void
 615 rt_setmetrics(u_long which, const struct rt_metrics *in,
 616         struct rt_metrics_lite *out)
 617 {
 618 #define metric(f, e) if (which & (f)) out->e = in->e;
 619         /*
 620          * Only these are stored in the routing entry since introduction
 621          * of tcp hostcache. The rest is ignored.
 622          */
 623         metric(RTV_MTU, rmx_mtu);
 624         /* Userland -> kernel timebase conversion. */
 625         if (which & RTV_EXPIRE)
 626                 out->rmx_expire = in->rmx_expire ?
 627                     in->rmx_expire - time_second + time_uptime : 0;
 628 #undef metric
 629 }
 630
 631 static void
 632 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out)
 633 {
 634 #define metric(e) out->e = in->e;
 635         bzero(out, sizeof(*out));
 636         metric(rmx_mtu);
 637         /* Kernel -> userland timebase conversion. */
 638         out->rmx_expire = in->rmx_expire ?
 639             in->rmx_expire - time_uptime + time_second : 0;
 640 #undef metric
 641 }
 642
 643 /*
 644  * Extract the addresses of the passed sockaddrs.
 645  * Do a little sanity checking so as to avoid bad memory references.
 646  * This data is derived straight from userland.
 647  */
 648 static int
 649 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo)
 650 {
 651         struct sockaddr *sa;
 652         int i;
 653
 654         for (i = 0; i < RTAX_MAX && cp < cplim; i++) {
 655                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
 656                         continue;
 657                 sa = (struct sockaddr *)cp;
 658                 /*
 659                  * It won't fit.
 660                  */
 661                 if (cp + sa->sa_len > cplim)
 662                         return (EINVAL);
 663                 /*
 664                  * there are no more.. quit now
 665                  * If there are more bits, they are in error.
 666                  * I've seen this. route(1) can evidently generate these.
 667                  * This causes kernel to core dump.
 668                  * for compatibility, If we see this, point to a safe address.
 669                  */
 670                 if (sa->sa_len == 0) {
 671                         rtinfo->rti_info[i] = &sa_zero;
 672                         return (0); /* should be EINVAL but for compat */
 673                 }
 674                 /* accept it */
 675                 rtinfo->rti_info[i] = sa;
 676                 cp += SA_SIZE(sa);
 677         }
 678         return (0);
 679 }
 680
 681 static struct mbuf *
 682 rt_msg1(int type, struct rt_addrinfo *rtinfo)
 683 {
 684         struct rt_msghdr *rtm;
 685         struct mbuf *m;
 686         int i;
 687         struct sockaddr *sa;
 688         int len, dlen;
 689
 690         switch (type) {
 691
 692         case RTM_DELADDR:
 693         case RTM_NEWADDR:
 694                 len = sizeof(struct ifa_msghdr);
 695                 break;
 696
 697         case RTM_DELMADDR:
 698         case RTM_NEWMADDR:
 699                 len = sizeof(struct ifma_msghdr);
 700                 break;
 701
 702         case RTM_IFINFO:
 703                 len = sizeof(struct if_msghdr);
 704                 break;
 705
 706         case RTM_IFANNOUNCE:
 707         case RTM_IEEE80211:
 708                 len = sizeof(struct if_announcemsghdr);
 709                 break;
 710
 711         default:
 712                 len = sizeof(struct rt_msghdr);
 713         }
 714         if (len > MCLBYTES)
 715                 panic("rt_msg1");
 716         m = m_gethdr(M_DONTWAIT, MT_DATA);
 717         if (m && len > MHLEN) {
 718                 MCLGET(m, M_DONTWAIT);
 719                 if ((m->m_flags & M_EXT) == 0) {
 720                         m_free(m);
 721                         m = NULL;
 722                 }
 723         }
 724         if (m == NULL)
 725                 return (m);
 726         m->m_pkthdr.len = m->m_len = len;
 727         m->m_pkthdr.rcvif = NULL;
 728         rtm = mtod(m, struct rt_msghdr *);
 729         bzero((caddr_t)rtm, len);
 730         for (i = 0; i < RTAX_MAX; i++) {
 731                 if ((sa = rtinfo->rti_info[i]) == NULL)
 732                         continue;
 733                 rtinfo->rti_addrs |= (1 << i);
 734                 dlen = SA_SIZE(sa);
 735                 m_copyback(m, len, dlen, (caddr_t)sa);
 736                 len += dlen;
 737         }
 738         if (m->m_pkthdr.len != len) {
 739                 m_freem(m);
 740                 return (NULL);
 741         }
 742         rtm->rtm_msglen = len;
 743         rtm->rtm_version = RTM_VERSION;
 744         rtm->rtm_type = type;
 745         return (m);
 746 }
 747
 748 static int
 749 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w)
 750 {
 751         int i;
 752         int len, dlen, second_time = 0;
 753         caddr_t cp0;
 754
 755         rtinfo->rti_addrs = 0;
 756 again:
 757         switch (type) {
 758
 759         case RTM_DELADDR:
 760         case RTM_NEWADDR:
 761                 len = sizeof(struct ifa_msghdr);
 762                 break;
 763
 764         case RTM_IFINFO:
 765                 len = sizeof(struct if_msghdr);
 766                 break;
 767
 768         case RTM_NEWMADDR:
 769                 len = sizeof(struct ifma_msghdr);
 770                 break;
 771
 772         default:
 773                 len = sizeof(struct rt_msghdr);
 774         }
 775         cp0 = cp;
 776         if (cp0)
 777                 cp += len;
 778         for (i = 0; i < RTAX_MAX; i++) {
 779                 struct sockaddr *sa;
 780
 781                 if ((sa = rtinfo->rti_info[i]) == NULL)
 782                         continue;
 783                 rtinfo->rti_addrs |= (1 << i);
 784                 dlen = SA_SIZE(sa);
 785                 if (cp) {
 786                         bcopy((caddr_t)sa, cp, (unsigned)dlen);
 787                         cp += dlen;
 788                 }
 789                 len += dlen;
 790         }
 791         len = ALIGN(len);
 792         if (cp == NULL && w != NULL && !second_time) {
 793                 struct walkarg *rw = w;
 794
 795                 if (rw->w_req) {
 796                         if (rw->w_tmemsize < len) {
 797                                 if (rw->w_tmem)
 798                                         free(rw->w_tmem, M_RTABLE);
 799                                 rw->w_tmem = (caddr_t)
 800                                         malloc(len, M_RTABLE, M_NOWAIT);
 801                                 if (rw->w_tmem)
 802                                         rw->w_tmemsize = len;
 803                         }
 804                         if (rw->w_tmem) {
 805                                 cp = rw->w_tmem;
 806                                 second_time = 1;
 807                                 goto again;
 808                         }
 809                 }
 810         }
 811         if (cp) {
 812                 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
 813
 814                 rtm->rtm_version = RTM_VERSION;
 815                 rtm->rtm_type = type;
 816                 rtm->rtm_msglen = len;
 817         }
 818         return (len);
 819 }
 820
 821 /*
 822  * This routine is called to generate a message from the routing
 823  * socket indicating that a redirect has occured, a routing lookup
 824  * has failed, or that a protocol has detected timeouts to a particular
 825  * destination.
 826  */
 827 void
 828 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error)
 829 {
 830         struct rt_msghdr *rtm;
 831         struct mbuf *m;
 832         struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
 833
 834         if (route_cb.any_count == 0)
 835                 return;
 836         m = rt_msg1(type, rtinfo);
 837         if (m == NULL)
 838                 return;
 839         rtm = mtod(m, struct rt_msghdr *);
 840         rtm->rtm_flags = RTF_DONE | flags;
 841         rtm->rtm_errno = error;
 842         rtm->rtm_addrs = rtinfo->rti_addrs;
 843         rt_dispatch(m, sa);
 844 }
 845
 846 /*
 847  * This routine is called to generate a message from the routing
 848  * socket indicating that the status of a network interface has changed.
 849  */
 850 void
 851 rt_ifmsg(struct ifnet *ifp)
 852 {
 853         struct if_msghdr *ifm;
 854         struct mbuf *m;
 855         struct rt_addrinfo info;
 856
 857         if (route_cb.any_count == 0)
 858                 return;
 859         bzero((caddr_t)&info, sizeof(info));
 860         m = rt_msg1(RTM_IFINFO, &info);
 861         if (m == NULL)
 862                 return;
 863         ifm = mtod(m, struct if_msghdr *);
 864         ifm->ifm_index = ifp->if_index;
 865         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
 866         ifm->ifm_data = ifp->if_data;
 867         ifm->ifm_addrs = 0;
 868         rt_dispatch(m, NULL);
 869 }
 870
 871 /*
 872  * This is called to generate messages from the routing socket
 873  * indicating a network interface has had addresses associated with it.
 874  * if we ever reverse the logic and replace messages TO the routing
 875  * socket indicate a request to configure interfaces, then it will
 876  * be unnecessary as the routing socket will automatically generate
 877  * copies of it.
 878  */
 879 void
 880 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
 881 {
 882         struct rt_addrinfo info;
 883         struct sockaddr *sa = NULL;
 884         int pass;
 885         struct mbuf *m = NULL;
 886         struct ifnet *ifp = ifa->ifa_ifp;
 887
 888         KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
 889                 ("unexpected cmd %u", cmd));
 890 #ifdef SCTP
 891         /*
 892          * notify the SCTP stack
 893          * this will only get called when an address is added/deleted
 894          * XXX pass the ifaddr struct instead if ifa->ifa_addr...
 895          */
 896         sctp_addr_change(ifa, cmd);
 897 #endif /* SCTP */
 898         if (route_cb.any_count == 0)
 899                 return;
 900         for (pass = 1; pass < 3; pass++) {
 901                 bzero((caddr_t)&info, sizeof(info));
 902                 if ((cmd == RTM_ADD && pass == 1) ||
 903                     (cmd == RTM_DELETE && pass == 2)) {
 904                         struct ifa_msghdr *ifam;
 905                         int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
 906
 907                         info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr;
 908                         info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr;
 909                         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
 910                         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
 911                         if ((m = rt_msg1(ncmd, &info)) == NULL)
 912                                 continue;
 913                         ifam = mtod(m, struct ifa_msghdr *);
 914                         ifam->ifam_index = ifp->if_index;
 915                         ifam->ifam_metric = ifa->ifa_metric;
 916                         ifam->ifam_flags = ifa->ifa_flags;
 917                         ifam->ifam_addrs = info.rti_addrs;
 918                 }
 919                 if ((cmd == RTM_ADD && pass == 2) ||
 920                     (cmd == RTM_DELETE && pass == 1)) {
 921                         struct rt_msghdr *rtm;
 922
 923                         if (rt == NULL)
 924                                 continue;
 925                         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
 926                         info.rti_info[RTAX_DST] = sa = rt_key(rt);
 927                         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
 928                         if ((m = rt_msg1(cmd, &info)) == NULL)
 929                                 continue;
 930                         rtm = mtod(m, struct rt_msghdr *);
 931                         rtm->rtm_index = ifp->if_index;
 932                         rtm->rtm_flags |= rt->rt_flags;
 933                         rtm->rtm_errno = error;
 934                         rtm->rtm_addrs = info.rti_addrs;
 935                 }
 936                 rt_dispatch(m, sa);
 937         }
 938 }
 939
 940 /*
 941  * This is the analogue to the rt_newaddrmsg which performs the same
 942  * function but for multicast group memberhips.  This is easier since
 943  * there is no route state to worry about.
 944  */
 945 void
 946 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma)
 947 {
 948         struct rt_addrinfo info;
 949         struct mbuf *m = NULL;
 950         struct ifnet *ifp = ifma->ifma_ifp;
 951         struct ifma_msghdr *ifmam;
 952
 953         if (route_cb.any_count == 0)
 954                 return;
 955
 956         bzero((caddr_t)&info, sizeof(info));
 957         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
 958         info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL;
 959         /*
 960          * If a link-layer address is present, present it as a ``gateway''
 961          * (similarly to how ARP entries, e.g., are presented).
 962          */
 963         info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr;
 964         m = rt_msg1(cmd, &info);
 965         if (m == NULL)
 966                 return;
 967         ifmam = mtod(m, struct ifma_msghdr *);
 968         KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n",
 969             __func__));
 970         ifmam->ifmam_index = ifp->if_index;
 971         ifmam->ifmam_addrs = info.rti_addrs;
 972         rt_dispatch(m, ifma->ifma_addr);
 973 }
 974
 975 static struct mbuf *
 976 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what,
 977         struct rt_addrinfo *info)
 978 {
 979         struct if_announcemsghdr *ifan;
 980         struct mbuf *m;
 981
 982         if (route_cb.any_count == 0)
 983                 return NULL;
 984         bzero((caddr_t)info, sizeof(*info));
 985         m = rt_msg1(type, info);
 986         if (m != NULL) {
 987                 ifan = mtod(m, struct if_announcemsghdr *);
 988                 ifan->ifan_index = ifp->if_index;
 989                 strlcpy(ifan->ifan_name, ifp->if_xname,
 990                         sizeof(ifan->ifan_name));
 991                 ifan->ifan_what = what;
 992         }
 993         return m;
 994 }
 995
 996 /*
 997  * This is called to generate routing socket messages indicating
 998  * IEEE80211 wireless events.
 999  * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way.
1000  */
1001 void
1002 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len)
1003 {
1004         struct mbuf *m;
1005         struct rt_addrinfo info;
1006
1007         m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info);
1008         if (m != NULL) {
1009                 /*
1010                  * Append the ieee80211 data.  Try to stick it in the
1011                  * mbuf containing the ifannounce msg; otherwise allocate
1012                  * a new mbuf and append.
1013                  *
1014                  * NB: we assume m is a single mbuf.
1015                  */
1016                 if (data_len > M_TRAILINGSPACE(m)) {
1017                         struct mbuf *n = m_get(M_NOWAIT, MT_DATA);
1018                         if (n == NULL) {
1019                                 m_freem(m);
1020                                 return;
1021                         }
1022                         bcopy(data, mtod(n, void *), data_len);
1023                         n->m_len = data_len;
1024                         m->m_next = n;
1025                 } else if (data_len > 0) {
1026                         bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len);
1027                         m->m_len += data_len;
1028                 }
1029                 if (m->m_flags & M_PKTHDR)
1030                         m->m_pkthdr.len += data_len;
1031                 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len;
1032                 rt_dispatch(m, NULL);
1033         }
1034 }
1035
1036 /*
1037  * This is called to generate routing socket messages indicating
1038  * network interface arrival and departure.
1039  */
1040 void
1041 rt_ifannouncemsg(struct ifnet *ifp, int what)
1042 {
1043         struct mbuf *m;
1044         struct rt_addrinfo info;
1045
1046         m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info);
1047         if (m != NULL)
1048                 rt_dispatch(m, NULL);
1049 }
1050
1051 static void
1052 rt_dispatch(struct mbuf *m, const struct sockaddr *sa)
1053 {
1054         struct m_tag *tag;
1055
1056         /*
1057          * Preserve the family from the sockaddr, if any, in an m_tag for
1058          * use when injecting the mbuf into the routing socket buffer from
1059          * the netisr.
1060          */
1061         if (sa != NULL) {
1062                 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short),
1063                     M_NOWAIT);
1064                 if (tag == NULL) {
1065                         m_freem(m);
1066                         return;
1067                 }
1068                 *(unsigned short *)(tag + 1) = sa->sa_family;
1069                 m_tag_prepend(m, tag);
1070         }
1071         netisr_queue(NETISR_ROUTE, m);  /* mbuf is free'd on failure. */
1072 }
1073
1074 /*
1075  * This is used in dumping the kernel table via sysctl().
1076  */
1077 static int
1078 sysctl_dumpentry(struct radix_node *rn, void *vw)
1079 {
1080         struct walkarg *w = vw;
1081         struct rtentry *rt = (struct rtentry *)rn;
1082         int error = 0, size;
1083         struct rt_addrinfo info;
1084
1085         if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
1086                 return 0;
1087         bzero((caddr_t)&info, sizeof(info));
1088         info.rti_info[RTAX_DST] = rt_key(rt);
1089         info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
1090         info.rti_info[RTAX_NETMASK] = rt_mask(rt);
1091         info.rti_info[RTAX_GENMASK] = rt->rt_genmask;
1092         if (rt->rt_ifp) {
1093                 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr;
1094                 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr;
1095                 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
1096                         info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr;
1097         }
1098         size = rt_msg2(RTM_GET, &info, NULL, w);
1099         if (w->w_req && w->w_tmem) {
1100                 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
1101
1102                 rtm->rtm_flags = rt->rt_flags;
1103                 rtm->rtm_use = rt->rt_rmx.rmx_pksent;
1104                 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx);
1105                 rtm->rtm_index = rt->rt_ifp->if_index;
1106                 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
1107                 rtm->rtm_addrs = info.rti_addrs;
1108                 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
1109                 return (error);
1110         }
1111         return (error);
1112 }
1113
1114 static int
1115 sysctl_iflist(int af, struct walkarg *w)
1116 {
1117         struct ifnet *ifp;
1118         struct ifaddr *ifa;
1119         struct rt_addrinfo info;
1120         int len, error = 0;
1121
1122         bzero((caddr_t)&info, sizeof(info));
1123         IFNET_RLOCK();
1124         TAILQ_FOREACH(ifp, &ifnet, if_link) {
1125                 if (w->w_arg && w->w_arg != ifp->if_index)
1126                         continue;
1127                 ifa = ifp->if_addr;
1128                 info.rti_info[RTAX_IFP] = ifa->ifa_addr;
1129                 len = rt_msg2(RTM_IFINFO, &info, NULL, w);
1130                 info.rti_info[RTAX_IFP] = NULL;
1131                 if (w->w_req && w->w_tmem) {
1132                         struct if_msghdr *ifm;
1133
1134                         ifm = (struct if_msghdr *)w->w_tmem;
1135                         ifm->ifm_index = ifp->if_index;
1136                         ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags;
1137                         ifm->ifm_data = ifp->if_data;
1138                         ifm->ifm_addrs = info.rti_addrs;
1139                         error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
1140                         if (error)
1141                                 goto done;
1142                 }
1143                 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) {
1144                         if (af && af != ifa->ifa_addr->sa_family)
1145                                 continue;
1146                         if (jailed(curthread->td_ucred) &&
1147                             prison_if(curthread->td_ucred, ifa->ifa_addr))
1148                                 continue;
1149                         info.rti_info[RTAX_IFA] = ifa->ifa_addr;
1150                         info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask;
1151                         info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr;
1152                         len = rt_msg2(RTM_NEWADDR, &info, NULL, w);
1153                         if (w->w_req && w->w_tmem) {
1154                                 struct ifa_msghdr *ifam;
1155
1156                                 ifam = (struct ifa_msghdr *)w->w_tmem;
1157                                 ifam->ifam_index = ifa->ifa_ifp->if_index;
1158                                 ifam->ifam_flags = ifa->ifa_flags;
1159                                 ifam->ifam_metric = ifa->ifa_metric;
1160                                 ifam->ifam_addrs = info.rti_addrs;
1161                                 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1162                                 if (error)
1163                                         goto done;
1164                         }
1165                 }
1166                 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] =
1167                         info.rti_info[RTAX_BRD] = NULL;
1168         }
1169 done:
1170         IFNET_RUNLOCK();
1171         return (error);
1172 }
1173
1174 int
1175 sysctl_ifmalist(int af, struct walkarg *w)
1176 {
1177         struct ifnet *ifp;
1178         struct ifmultiaddr *ifma;
1179         struct  rt_addrinfo info;
1180         int     len, error = 0;
1181         struct ifaddr *ifa;
1182
1183         bzero((caddr_t)&info, sizeof(info));
1184         IFNET_RLOCK();
1185         TAILQ_FOREACH(ifp, &ifnet, if_link) {
1186                 if (w->w_arg && w->w_arg != ifp->if_index)
1187                         continue;
1188                 ifa = ifp->if_addr;
1189                 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL;
1190                 IF_ADDR_LOCK(ifp);
1191                 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1192                         if (af && af != ifma->ifma_addr->sa_family)
1193                                 continue;
1194                         if (jailed(curproc->p_ucred) &&
1195                             prison_if(curproc->p_ucred, ifma->ifma_addr))
1196                                 continue;
1197                         info.rti_info[RTAX_IFA] = ifma->ifma_addr;
1198                         info.rti_info[RTAX_GATEWAY] =
1199                             (ifma->ifma_addr->sa_family != AF_LINK) ?
1200                             ifma->ifma_lladdr : NULL;
1201                         len = rt_msg2(RTM_NEWMADDR, &info, NULL, w);
1202                         if (w->w_req && w->w_tmem) {
1203                                 struct ifma_msghdr *ifmam;
1204
1205                                 ifmam = (struct ifma_msghdr *)w->w_tmem;
1206                                 ifmam->ifmam_index = ifma->ifma_ifp->if_index;
1207                                 ifmam->ifmam_flags = 0;
1208                                 ifmam->ifmam_addrs = info.rti_addrs;
1209                                 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
1210                                 if (error) {
1211                                         IF_ADDR_UNLOCK(ifp);
1212                                         goto done;
1213                                 }
1214                         }
1215                 }
1216                 IF_ADDR_UNLOCK(ifp);
1217         }
1218 done:
1219         IFNET_RUNLOCK();
1220         return (error);
1221 }
1222
1223 static int
1224 sysctl_rtsock(SYSCTL_HANDLER_ARGS)
1225 {
1226         int     *name = (int *)arg1;
1227         u_int   namelen = arg2;
1228         struct radix_node_head *rnh;
1229         int     i, lim, error = EINVAL;
1230         u_char  af;
1231         struct  walkarg w;
1232
1233         name ++;
1234         namelen--;
1235         if (req->newptr)
1236                 return (EPERM);
1237         if (namelen != 3)
1238                 return ((namelen < 3) ? EISDIR : ENOTDIR);
1239         af = name[0];
1240         if (af > AF_MAX)
1241                 return (EINVAL);
1242         bzero(&w, sizeof(w));
1243         w.w_op = name[1];
1244         w.w_arg = name[2];
1245         w.w_req = req;
1246
1247         error = sysctl_wire_old_buffer(req, 0);
1248         if (error)
1249                 return (error);
1250         switch (w.w_op) {
1251
1252         case NET_RT_DUMP:
1253         case NET_RT_FLAGS:
1254                 if (af == 0) {                  /* dump all tables */
1255                         i = 1;
1256                         lim = AF_MAX;
1257                 } else                          /* dump only one table */
1258                         i = lim = af;
1259                 for (error = 0; error == 0 && i <= lim; i++)
1260                         if ((rnh = rt_tables[i]) != NULL) {
1261                                 RADIX_NODE_HEAD_LOCK(rnh);
1262                                 error = rnh->rnh_walktree(rnh,
1263                                     sysctl_dumpentry, &w);
1264                                 RADIX_NODE_HEAD_UNLOCK(rnh);
1265                         } else if (af != 0)
1266                                 error = EAFNOSUPPORT;
1267                 break;
1268
1269         case NET_RT_IFLIST:
1270                 error = sysctl_iflist(af, &w);
1271                 break;
1272
1273         case NET_RT_IFMALIST:
1274                 error = sysctl_ifmalist(af, &w);
1275                 break;
1276         }
1277         if (w.w_tmem)
1278                 free(w.w_tmem, M_RTABLE);
1279         return (error);
1280 }
1281
1282 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
1283
1284 /*
1285  * Definitions of protocols supported in the ROUTE domain.
1286  */
1287
1288 static struct domain routedomain;               /* or at least forward */
1289
1290 static struct protosw routesw[] = {
1291 {
1292         .pr_type =              SOCK_RAW,
1293         .pr_domain =            &routedomain,
1294         .pr_flags =             PR_ATOMIC|PR_ADDR,
1295         .pr_output =            route_output,
1296         .pr_ctlinput =          raw_ctlinput,
1297         .pr_init =              raw_init,
1298         .pr_usrreqs =           &route_usrreqs
1299 }
1300 };
1301
1302 static struct domain routedomain = {
1303         .dom_family =           PF_ROUTE,
1304         .dom_name =              "route",
1305         .dom_protosw =          routesw,
1306         .dom_protoswNPROTOSW =  &routesw[sizeof(routesw)/sizeof(routesw[0])]
1307 };
1308
1309 DOMAIN_SET(route);