bsd/netinet6/raw_ip6.c

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * 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  * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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  * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.4 2001/07/29 19:32:40 ume Exp $
  30  */
  31
  32 /*
  33  * Copyright (c) 1982, 1986, 1988, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  65  */
  66 #include <sys/param.h>
  67 #include <sys/malloc.h>
  68 #include <sys/proc.h>
  69 #include <sys/mbuf.h>
  70 #include <sys/socket.h>
  71 #include <sys/protosw.h>
  72 #include <sys/socketvar.h>
  73 #include <sys/errno.h>
  74 #include <sys/systm.h>
  75
  76 #include <net/if.h>
  77 #include <net/route.h>
  78 #include <net/if_types.h>
  79
  80 #include <netinet/in.h>
  81 #include <netinet/in_var.h>
  82 #include <netinet/in_systm.h>
  83 #include <netinet/ip6.h>
  84 #include <netinet6/ip6_var.h>
  85 #include <netinet6/ip6_mroute.h>
  86 #include <netinet/icmp6.h>
  87 #include <netinet/in_pcb.h>
  88 #include <netinet6/in6_pcb.h>
  89 #include <netinet6/nd6.h>
  90 #include <netinet6/ip6protosw.h>
  91 #if ENABLE_DEFAULT_SCOPE
  92 #include <netinet6/scope6_var.h>
  93 #endif
  94 #include <netinet6/raw_ip6.h>
  95 #include <netinet6/ip6_fw.h>
  96
  97 #if IPSEC
  98 #include <netinet6/ipsec.h>
  99 #include <netinet6/ipsec6.h>
 100 extern int ipsec_bypass;
 101 #endif /*IPSEC*/
 102
 103 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 104 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 105
 106 /*
 107  * Raw interface to IP6 protocol.
 108  */
 109
 110 extern struct   inpcbhead ripcb;
 111 extern struct   inpcbinfo ripcbinfo;
 112 extern u_long   rip_sendspace;
 113 extern u_long   rip_recvspace;
 114 extern u_long  route_generation;
 115
 116 struct rip6stat rip6stat;
 117
 118 /*
 119  * Setup generic address and protocol structures
 120  * for raw_input routine, then pass them along with
 121  * mbuf chain.
 122  */
 123 int
 124 rip6_input(
 125         struct  mbuf **mp,
 126         int     *offp)
 127 {
 128         struct mbuf *m = *mp;
 129         register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 130         register struct inpcb *in6p;
 131         struct inpcb *last = 0;
 132         struct mbuf *opts = NULL;
 133         struct sockaddr_in6 rip6src;
 134         int proto = ip6->ip6_nxt;
 135
 136         rip6stat.rip6s_ipackets++;
 137
 138 #if defined(NFAITH) && 0 < NFAITH
 139         if (faithprefix(&ip6->ip6_dst)) {
 140                 /* XXX send icmp6 host/port unreach? */
 141                 m_freem(m);
 142                 return IPPROTO_DONE;
 143         }
 144 #endif
 145
 146         init_sin6(&rip6src, m); /* general init */
 147
 148         lck_rw_lock_shared(ripcbinfo.mtx);
 149         LIST_FOREACH(in6p, &ripcb, inp_list) {
 150                 if ((in6p->in6p_vflag & INP_IPV6) == 0)
 151                         continue;
 152                 if (in6p->in6p_ip6_nxt &&
 153                     in6p->in6p_ip6_nxt != proto)
 154                         continue;
 155                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 156                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 157                         continue;
 158                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 159                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 160                         continue;
 161                 if (in6p->in6p_cksum != -1) {
 162                         rip6stat.rip6s_isum++;
 163                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 164                             m->m_pkthdr.len - *offp)) {
 165                                 rip6stat.rip6s_badsum++;
 166                                 continue;
 167                         }
 168                 }
 169                 if (last) {
 170                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 171
 172 #if IPSEC
 173                         /*
 174                          * Check AH/ESP integrity.
 175                          */
 176                         if (ipsec_bypass == 0 && n && ipsec6_in_reject_so(n, last->inp_socket)) {
 177                                         m_freem(n);
 178                                         IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
 179                                         /* do not inject data into pcb */
 180                         } else
 181 #endif /*IPSEC*/
 182                         if (n) {
 183                                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 184                                     last->in6p_socket->so_options & SO_TIMESTAMP)
 185                                         ip6_savecontrol(last, &opts, ip6, n);
 186                                 /* strip intermediate headers */
 187                                 m_adj(n, *offp);
 188                                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 189                                                 (struct sockaddr *)&rip6src,
 190                                                  n, opts, NULL) == 0) {
 191                                         rip6stat.rip6s_fullsock++;
 192                                 } else
 193                                         sorwakeup(last->in6p_socket);
 194                                 opts = NULL;
 195                         }
 196                 }
 197                 last = in6p;
 198         }
 199         lck_rw_done(ripcbinfo.mtx);
 200 #if IPSEC
 201         /*
 202          * Check AH/ESP integrity.
 203          */
 204         if (ipsec_bypass == 0 && last && ipsec6_in_reject_so(m, last->inp_socket)) {
 205                         m_freem(m);
 206                         IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
 207                         ip6stat.ip6s_delivered--;
 208                         /* do not inject data into pcb */
 209         } else
 210 #endif /*IPSEC*/
 211         if (last) {
 212                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 213                     last->in6p_socket->so_options & SO_TIMESTAMP)
 214                         ip6_savecontrol(last, &opts, ip6, m);
 215                 /* strip intermediate headers */
 216                 m_adj(m, *offp);
 217                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 218                                 (struct sockaddr *)&rip6src, m, opts, NULL) == 0) {
 219                         rip6stat.rip6s_fullsock++;
 220                 } else
 221                         sorwakeup(last->in6p_socket);
 222         } else {
 223                 rip6stat.rip6s_nosock++;
 224                 if (m->m_flags & M_MCAST)
 225                         rip6stat.rip6s_nosockmcast++;
 226                 if (proto == IPPROTO_NONE)
 227                         m_freem(m);
 228                 else {
 229                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 230                         icmp6_error(m, ICMP6_PARAM_PROB,
 231                                     ICMP6_PARAMPROB_NEXTHEADER,
 232                                     prvnxtp - mtod(m, char *));
 233                 }
 234                 ip6stat.ip6s_delivered--;
 235         }
 236         return IPPROTO_DONE;
 237 }
 238
 239 void
 240 rip6_ctlinput(
 241         int cmd,
 242         struct sockaddr *sa,
 243         void *d)
 244 {
 245         struct ip6_hdr *ip6;
 246         struct mbuf *m;
 247         int off = 0;
 248         struct ip6ctlparam *ip6cp = NULL;
 249         const struct sockaddr_in6 *sa6_src = NULL;
 250         void (*notify)(struct inpcb *, int) = in6_rtchange;
 251
 252         if (sa->sa_family != AF_INET6 ||
 253             sa->sa_len != sizeof(struct sockaddr_in6))
 254                 return;
 255
 256         if ((unsigned)cmd >= PRC_NCMDS)
 257                 return;
 258         if (PRC_IS_REDIRECT(cmd))
 259                 notify = in6_rtchange, d = NULL;
 260         else if (cmd == PRC_HOSTDEAD)
 261                 d = NULL;
 262         else if (inet6ctlerrmap[cmd] == 0)
 263                 return;
 264
 265         /* if the parameter is from icmp6, decode it. */
 266         if (d != NULL) {
 267                 ip6cp = (struct ip6ctlparam *)d;
 268                 m = ip6cp->ip6c_m;
 269                 ip6 = ip6cp->ip6c_ip6;
 270                 off = ip6cp->ip6c_off;
 271                 sa6_src = ip6cp->ip6c_src;
 272         } else {
 273                 m = NULL;
 274                 ip6 = NULL;
 275                 sa6_src = &sa6_any;
 276         }
 277
 278         (void) in6_pcbnotify(&ripcbinfo, sa, 0, (const struct sockaddr *)sa6_src,
 279                              0, cmd, notify);
 280 }
 281
 282 /*
 283  * Generate IPv6 header and pass packet to ip6_output.
 284  * Tack on options user may have setup with control call.
 285  */
 286 int
 287 rip6_output(
 288         register struct mbuf *m,
 289         struct socket *so,
 290         struct sockaddr_in6 *dstsock,
 291         struct mbuf *control)
 292 {
 293         struct in6_addr *dst;
 294         struct ip6_hdr *ip6;
 295         struct inpcb *in6p;
 296         u_int   plen = m->m_pkthdr.len;
 297         int error = 0;
 298         struct ip6_pktopts opt, *optp = 0;
 299         struct ifnet *oifp = NULL;
 300         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 301         int priv = 0;
 302
 303         in6p = sotoin6pcb(so);
 304
 305         priv = 0;
 306         if (so->so_uid == 0)
 307                 priv = 1;
 308         dst = &dstsock->sin6_addr;
 309         if (control) {
 310                 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
 311                         goto bad;
 312                 optp = &opt;
 313         } else
 314                 optp = in6p->in6p_outputopts;
 315
 316         /*
 317          * For an ICMPv6 packet, we should know its type and code
 318          * to update statistics.
 319          */
 320         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 321                 struct icmp6_hdr *icmp6;
 322                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 323                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 324                         error = ENOBUFS;
 325                         goto bad;
 326                 }
 327                 icmp6 = mtod(m, struct icmp6_hdr *);
 328                 type = icmp6->icmp6_type;
 329                 code = icmp6->icmp6_code;
 330         }
 331
 332         M_PREPEND(m, sizeof(*ip6), M_WAIT);
 333         ip6 = mtod(m, struct ip6_hdr *);
 334
 335         /*
 336          * Next header might not be ICMP6 but use its pseudo header anyway.
 337          */
 338         ip6->ip6_dst = *dst;
 339
 340         /*
 341          * If the scope of the destination is link-local, embed the interface
 342          * index in the address.
 343          *
 344          * XXX advanced-api value overrides sin6_scope_id
 345          */
 346         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 347                 struct in6_pktinfo *pi;
 348
 349                 /*
 350                  * XXX Boundary check is assumed to be already done in
 351                  * ip6_setpktoptions().
 352                  */
 353                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 354                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 355                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 356                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 357                          in6p->in6p_moptions &&
 358                          in6p->in6p_moptions->im6o_multicast_ifp) {
 359                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 360                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 361                 } else if (dstsock->sin6_scope_id) {
 362                         /* boundary check */
 363                         if (dstsock->sin6_scope_id < 0
 364                          || if_index < dstsock->sin6_scope_id) {
 365                                 error = ENXIO;  /* XXX EINVAL? */
 366                                 goto bad;
 367                         }
 368                         ip6->ip6_dst.s6_addr16[1]
 369                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 370                 }
 371         }
 372
 373         /*
 374          * Source address selection.
 375          */
 376         {
 377                 struct in6_addr *in6a;
 378                 struct in6_addr storage;
 379
 380                 if ((in6a = in6_selectsrc(dstsock, optp,
 381                                           in6p->in6p_moptions,
 382                                           &in6p->in6p_route,
 383                                           &in6p->in6p_laddr,
 384                                           &storage, &error)) == 0) {
 385                         if (error == 0)
 386                                 error = EADDRNOTAVAIL;
 387                         goto bad;
 388                 }
 389                 ip6->ip6_src = *in6a;
 390                 if (in6p->in6p_route.ro_rt)
 391                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 392         }
 393         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 394                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 395         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 396                 (IPV6_VERSION & IPV6_VERSION_MASK);
 397         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 398         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 399         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 400
 401         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 402             in6p->in6p_cksum != -1) {
 403                 struct mbuf *n;
 404                 int off;
 405                 u_int16_t *p;
 406
 407                 /* compute checksum */
 408                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 409                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 410                 else
 411                         off = in6p->in6p_cksum;
 412                 if (plen < off + 1) {
 413                         error = EINVAL;
 414                         goto bad;
 415                 }
 416                 off += sizeof(struct ip6_hdr);
 417
 418                 n = m;
 419                 while (n && n->m_len <= off) {
 420                         off -= n->m_len;
 421                         n = n->m_next;
 422                 }
 423                 if (!n)
 424                         goto bad;
 425                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 426                 *p = 0;
 427                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 428         }
 429
 430 #if IPSEC
 431         if (ipsec_bypass == 0 && ipsec_setsocket(m, so) != 0) {
 432                 error = ENOBUFS;
 433                 goto bad;
 434         }
 435 #endif /*IPSEC*/
 436
 437         if (in6p->in6p_route.ro_rt && in6p->in6p_route.ro_rt->generation_id != route_generation) {
 438                 rtfree(in6p->in6p_route.ro_rt);
 439                 in6p->in6p_route.ro_rt = (struct rtentry *)0;
 440         }
 441
 442         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 443                            in6p->in6p_moptions, &oifp, 0);
 444         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 445                 if (oifp)
 446                         icmp6_ifoutstat_inc(oifp, type, code);
 447                 icmp6stat.icp6s_outhist[type]++;
 448         } else
 449                 rip6stat.rip6s_opackets++;
 450
 451         goto freectl;
 452
 453  bad:
 454         if (m)
 455                 m_freem(m);
 456
 457  freectl:
 458         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) {
 459                 rtfree(optp->ip6po_route.ro_rt);
 460                 optp->ip6po_route.ro_rt = NULL;
 461         }
 462         if (control) {
 463                 if (optp == &opt)
 464                         ip6_clearpktopts(optp, 0, -1);
 465                 m_freem(control);
 466         }
 467         return(error);
 468 }
 469
 470 static void
 471 load_ip6fw(void)
 472 {
 473         ip6_fw_init();
 474 }
 475
 476 /*
 477  * Raw IPv6 socket option processing.
 478  */
 479 int
 480 rip6_ctloutput(
 481         struct socket *so,
 482         struct sockopt *sopt)
 483 {
 484         int error;
 485
 486         if (sopt->sopt_level == IPPROTO_ICMPV6)
 487                 /*
 488                  * XXX: is it better to call icmp6_ctloutput() directly
 489                  * from protosw?
 490                  */
 491                 return(icmp6_ctloutput(so, sopt));
 492         else if (sopt->sopt_level != IPPROTO_IPV6)
 493                 return (EINVAL);
 494
 495         error = 0;
 496
 497         switch (sopt->sopt_dir) {
 498         case SOPT_GET:
 499                 switch (sopt->sopt_name) {
 500                 case IPV6_FW_ADD:
 501                 case IPV6_FW_GET:
 502                         if (ip6_fw_ctl_ptr == 0)
 503                                 load_ip6fw();
 504                         if (ip6_fw_ctl_ptr)
 505                                 error = ip6_fw_ctl_ptr(sopt);
 506                         else
 507                                 error = ENOPROTOOPT;
 508                         break;
 509
 510                 case MRT6_INIT:
 511                 case MRT6_DONE:
 512                 case MRT6_ADD_MIF:
 513                 case MRT6_DEL_MIF:
 514                 case MRT6_ADD_MFC:
 515                 case MRT6_DEL_MFC:
 516                 case MRT6_PIM:
 517                         error = ip6_mrouter_get(so, sopt);
 518                         break;
 519                 default:
 520                         error = ip6_ctloutput(so, sopt);
 521                         break;
 522                 }
 523                 break;
 524
 525         case SOPT_SET:
 526                 switch (sopt->sopt_name) {
 527                 case IPV6_FW_ADD:
 528                 case IPV6_FW_DEL:
 529                 case IPV6_FW_FLUSH:
 530                 case IPV6_FW_ZERO:
 531                         if (ip6_fw_ctl_ptr == 0)
 532                                 load_ip6fw();
 533                         if (ip6_fw_ctl_ptr)
 534                                 error = ip6_fw_ctl_ptr(sopt);
 535                         else
 536                                 error = ENOPROTOOPT;
 537                         break;
 538
 539                 case MRT6_INIT:
 540                 case MRT6_DONE:
 541                 case MRT6_ADD_MIF:
 542                 case MRT6_DEL_MIF:
 543                 case MRT6_ADD_MFC:
 544                 case MRT6_DEL_MFC:
 545                 case MRT6_PIM:
 546                         error = ip6_mrouter_set(so, sopt);
 547                         break;
 548                 default:
 549                         error = ip6_ctloutput(so, sopt);
 550                         break;
 551                 }
 552                 break;
 553         }
 554
 555         return (error);
 556 }
 557
 558 static int
 559 rip6_attach(struct socket *so, int proto, __unused struct proc *p)
 560 {
 561         struct inpcb *inp;
 562         int error;
 563
 564         inp = sotoinpcb(so);
 565         if (inp)
 566                 panic("rip6_attach");
 567         if (p && (error = proc_suser(p)) != 0)
 568                 return error;
 569
 570         error = soreserve(so, rip_sendspace, rip_recvspace);
 571         if (error)
 572                 return error;
 573         error = in_pcballoc(so, &ripcbinfo, p);
 574         if (error)
 575                 return error;
 576         inp = (struct inpcb *)so->so_pcb;
 577         inp->inp_vflag |= INP_IPV6;
 578         inp->in6p_ip6_nxt = (long)proto;
 579         inp->in6p_hops = -1;    /* use kernel default */
 580         inp->in6p_cksum = -1;
 581         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 582                sizeof(struct icmp6_filter), M_PCB, M_WAITOK);
 583         if (inp->in6p_icmp6filt == NULL)
 584                 return (ENOMEM);
 585         ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 586         return 0;
 587 }
 588
 589 static int
 590 rip6_detach(struct socket *so)
 591 {
 592         struct inpcb *inp;
 593
 594         inp = sotoinpcb(so);
 595         if (inp == 0)
 596                 panic("rip6_detach");
 597         /* xxx: RSVP */
 598         if (so == ip6_mrouter)
 599                 ip6_mrouter_done();
 600         if (inp->in6p_icmp6filt) {
 601                 FREE(inp->in6p_icmp6filt, M_PCB);
 602                 inp->in6p_icmp6filt = NULL;
 603         }
 604         in6_pcbdetach(inp);
 605         return 0;
 606 }
 607
 608 static int
 609 rip6_abort(struct socket *so)
 610 {
 611         soisdisconnected(so);
 612         return rip6_detach(so);
 613 }
 614
 615 static int
 616 rip6_disconnect(struct socket *so)
 617 {
 618         struct inpcb *inp = sotoinpcb(so);
 619
 620         if ((so->so_state & SS_ISCONNECTED) == 0)
 621                 return ENOTCONN;
 622         inp->in6p_faddr = in6addr_any;
 623         return rip6_abort(so);
 624 }
 625
 626 static int
 627 rip6_bind(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
 628 {
 629         struct inpcb *inp = sotoinpcb(so);
 630         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 631         struct ifaddr *ia = NULL;
 632
 633         if (nam->sa_len != sizeof(*addr))
 634                 return EINVAL;
 635
 636         if (TAILQ_EMPTY(&ifnet_head) || addr->sin6_family != AF_INET6)
 637                 return EADDRNOTAVAIL;
 638 #if ENABLE_DEFAULT_SCOPE
 639         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 640                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 641         }
 642 #endif
 643         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 644             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
 645                 return EADDRNOTAVAIL;
 646         if (ia &&
 647             ((struct in6_ifaddr *)ia)->ia6_flags &
 648             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 649              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 650             if (ia) ifafree(ia);
 651                 return(EADDRNOTAVAIL);
 652         }
 653         if (ia != NULL)
 654                 ifafree(ia);
 655         inp->in6p_laddr = addr->sin6_addr;
 656         return 0;
 657 }
 658
 659 static int
 660 rip6_connect(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
 661 {
 662         struct inpcb *inp = sotoinpcb(so);
 663         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 664         struct in6_addr *in6a = NULL;
 665         struct in6_addr storage;
 666         int error = 0;
 667 #if ENABLE_DEFAULT_SCOPE
 668         struct sockaddr_in6 tmp;
 669 #endif
 670
 671         if (nam->sa_len != sizeof(*addr))
 672                 return EINVAL;
 673         if (TAILQ_EMPTY(&ifnet_head))
 674                 return EADDRNOTAVAIL;
 675         if (addr->sin6_family != AF_INET6)
 676                 return EAFNOSUPPORT;
 677 #if ENABLE_DEFAULT_SCOPE
 678         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 679                 /* avoid overwrites */
 680                 tmp = *addr;
 681                 addr = &tmp;
 682                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 683         }
 684 #endif
 685         /* Source address selection. XXX: need pcblookup? */
 686         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 687                              inp->in6p_moptions, &inp->in6p_route,
 688                              &inp->in6p_laddr, &storage, &error);
 689         if (in6a == NULL)
 690                 return (error ? error : EADDRNOTAVAIL);
 691         inp->in6p_laddr = *in6a;
 692         inp->in6p_faddr = addr->sin6_addr;
 693         soisconnected(so);
 694         return 0;
 695 }
 696
 697 static int
 698 rip6_shutdown(struct socket *so)
 699 {
 700         socantsendmore(so);
 701         return 0;
 702 }
 703
 704 static int
 705 rip6_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr *nam,
 706          struct mbuf *control, __unused struct proc *p)
 707 {
 708         struct inpcb *inp = sotoinpcb(so);
 709         struct sockaddr_in6 tmp;
 710         struct sockaddr_in6 *dst;
 711
 712         /* always copy sockaddr to avoid overwrites */
 713         if (so->so_state & SS_ISCONNECTED) {
 714                 if (nam) {
 715                         m_freem(m);
 716                         return EISCONN;
 717                 }
 718                 /* XXX */
 719                 bzero(&tmp, sizeof(tmp));
 720                 tmp.sin6_family = AF_INET6;
 721                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 722                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 723                       sizeof(struct in6_addr));
 724                 dst = &tmp;
 725         } else {
 726                 if (nam == NULL) {
 727                         m_freem(m);
 728                         return ENOTCONN;
 729                 }
 730                 tmp = *(struct sockaddr_in6 *)nam;
 731                 dst = &tmp;
 732         }
 733 #if ENABLE_DEFAULT_SCOPE
 734         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 735                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 736         }
 737 #endif
 738         return rip6_output(m, so, dst, control);
 739 }
 740
 741 struct pr_usrreqs rip6_usrreqs = {
 742         rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect,
 743         pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
 744         pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
 745         pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown,
 746         in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
 747 };
 748
 749 __private_extern__ struct pr_usrreqs icmp6_dgram_usrreqs = {
 750         rip6_abort, pru_accept_notsupp, icmp6_dgram_attach, rip6_bind, rip6_connect,
 751         pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
 752         pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
 753         pru_rcvoob_notsupp, icmp6_dgram_send, pru_sense_null, rip6_shutdown,
 754         in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
 755 };
 756
 757
 758