bsd/netinet6/raw_ip6.c

   1 /*
   2  * Copyright (c) 2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. Neither the name of the project nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.4 2001/07/29 19:32:40 ume Exp $
  57  */
  58
  59 /*
  60  * Copyright (c) 1982, 1986, 1988, 1993
  61  *      The Regents of the University of California.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  * 1. Redistributions of source code must retain the above copyright
  67  *    notice, this list of conditions and the following disclaimer.
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in the
  70  *    documentation and/or other materials provided with the distribution.
  71  * 3. All advertising materials mentioning features or use of this software
  72  *    must display the following acknowledgement:
  73  *      This product includes software developed by the University of
  74  *      California, Berkeley and its contributors.
  75  * 4. Neither the name of the University nor the names of its contributors
  76  *    may be used to endorse or promote products derived from this software
  77  *    without specific prior written permission.
  78  *
  79  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  80  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  81  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  82  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  83  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  84  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  85  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  86  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  87  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  88  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  89  * SUCH DAMAGE.
  90  *
  91  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  92  */
  93 #include <sys/param.h>
  94 #include <sys/malloc.h>
  95 #include <sys/proc.h>
  96 #include <sys/mbuf.h>
  97 #include <sys/socket.h>
  98 #include <sys/protosw.h>
  99 #include <sys/socketvar.h>
 100 #include <sys/errno.h>
 101 #include <sys/systm.h>
 102
 103 #include <net/if.h>
 104 #include <net/route.h>
 105 #include <net/if_types.h>
 106
 107 #include <netinet/in.h>
 108 #include <netinet/in_var.h>
 109 #include <netinet/in_systm.h>
 110 #include <netinet/ip6.h>
 111 #include <netinet6/ip6_var.h>
 112 #include <netinet6/ip6_mroute.h>
 113 #include <netinet/icmp6.h>
 114 #include <netinet/in_pcb.h>
 115 #include <netinet6/in6_pcb.h>
 116 #include <netinet6/nd6.h>
 117 #include <netinet6/ip6protosw.h>
 118 #if ENABLE_DEFAULT_SCOPE
 119 #include <netinet6/scope6_var.h>
 120 #endif
 121 #include <netinet6/raw_ip6.h>
 122 #include <netinet6/ip6_fw.h>
 123
 124 #if IPSEC
 125 #include <netinet6/ipsec.h>
 126 #include <netinet6/ipsec6.h>
 127 extern int ipsec_bypass;
 128 #endif /*IPSEC*/
 129
 130 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 131 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 132
 133 /*
 134  * Raw interface to IP6 protocol.
 135  */
 136
 137 extern struct   inpcbhead ripcb;
 138 extern struct   inpcbinfo ripcbinfo;
 139 extern u_int32_t        rip_sendspace;
 140 extern u_int32_t        rip_recvspace;
 141
 142 struct rip6stat rip6stat;
 143
 144 /*
 145  * Setup generic address and protocol structures
 146  * for raw_input routine, then pass them along with
 147  * mbuf chain.
 148  */
 149 int
 150 rip6_input(
 151         struct  mbuf **mp,
 152         int     *offp)
 153 {
 154         struct mbuf *m = *mp;
 155         register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 156         register struct inpcb *in6p;
 157         struct inpcb *last = 0;
 158         struct mbuf *opts = NULL;
 159         struct sockaddr_in6 rip6src;
 160         int proto = ip6->ip6_nxt;
 161
 162         rip6stat.rip6s_ipackets++;
 163
 164 #if defined(NFAITH) && 0 < NFAITH
 165         if (faithprefix(&ip6->ip6_dst)) {
 166                 /* XXX send icmp6 host/port unreach? */
 167                 m_freem(m);
 168                 return IPPROTO_DONE;
 169         }
 170 #endif
 171
 172         init_sin6(&rip6src, m); /* general init */
 173
 174         lck_rw_lock_shared(ripcbinfo.mtx);
 175         LIST_FOREACH(in6p, &ripcb, inp_list) {
 176                 if ((in6p->in6p_vflag & INP_IPV6) == 0)
 177                         continue;
 178                 if (in6p->in6p_ip6_nxt &&
 179                     in6p->in6p_ip6_nxt != proto)
 180                         continue;
 181                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 182                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 183                         continue;
 184                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 185                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 186                         continue;
 187                 if (in6p->in6p_cksum != -1) {
 188                         rip6stat.rip6s_isum++;
 189                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 190                             m->m_pkthdr.len - *offp)) {
 191                                 rip6stat.rip6s_badsum++;
 192                                 continue;
 193                         }
 194                 }
 195                 if (last) {
 196                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 197
 198 #if IPSEC
 199                         /*
 200                          * Check AH/ESP integrity.
 201                          */
 202                         if (ipsec_bypass == 0 && n && ipsec6_in_reject_so(n, last->inp_socket)) {
 203                                         m_freem(n);
 204                                         IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
 205                                         /* do not inject data into pcb */
 206                         } else
 207 #endif /*IPSEC*/
 208                         if (n) {
 209                                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 210                                     last->in6p_socket->so_options & SO_TIMESTAMP)
 211                                         ip6_savecontrol(last, &opts, ip6, n);
 212                                 /* strip intermediate headers */
 213                                 m_adj(n, *offp);
 214                                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 215                                                 (struct sockaddr *)&rip6src,
 216                                                  n, opts, NULL) == 0) {
 217                                         rip6stat.rip6s_fullsock++;
 218                                 } else
 219                                         sorwakeup(last->in6p_socket);
 220                                 opts = NULL;
 221                         }
 222                 }
 223                 last = in6p;
 224         }
 225         lck_rw_done(ripcbinfo.mtx);
 226 #if IPSEC
 227         /*
 228          * Check AH/ESP integrity.
 229          */
 230         if (ipsec_bypass == 0 && last && ipsec6_in_reject_so(m, last->inp_socket)) {
 231                         m_freem(m);
 232                         IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
 233                         ip6stat.ip6s_delivered--;
 234                         /* do not inject data into pcb */
 235         } else
 236 #endif /*IPSEC*/
 237         if (last) {
 238                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 239                     last->in6p_socket->so_options & SO_TIMESTAMP)
 240                         ip6_savecontrol(last, &opts, ip6, m);
 241                 /* strip intermediate headers */
 242                 m_adj(m, *offp);
 243                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 244                                 (struct sockaddr *)&rip6src, m, opts, NULL) == 0) {
 245                         rip6stat.rip6s_fullsock++;
 246                 } else
 247                         sorwakeup(last->in6p_socket);
 248         } else {
 249                 rip6stat.rip6s_nosock++;
 250                 if (m->m_flags & M_MCAST)
 251                         rip6stat.rip6s_nosockmcast++;
 252                 if (proto == IPPROTO_NONE)
 253                         m_freem(m);
 254                 else {
 255                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 256                         icmp6_error(m, ICMP6_PARAM_PROB,
 257                                     ICMP6_PARAMPROB_NEXTHEADER,
 258                                     prvnxtp - mtod(m, char *));
 259                 }
 260                 ip6stat.ip6s_delivered--;
 261         }
 262         return IPPROTO_DONE;
 263 }
 264
 265 void
 266 rip6_ctlinput(
 267         int cmd,
 268         struct sockaddr *sa,
 269         void *d)
 270 {
 271         struct ip6_hdr *ip6;
 272         struct mbuf *m;
 273         int off = 0;
 274         struct ip6ctlparam *ip6cp = NULL;
 275         const struct sockaddr_in6 *sa6_src = NULL;
 276         void (*notify)(struct inpcb *, int) = in6_rtchange;
 277
 278         if (sa->sa_family != AF_INET6 ||
 279             sa->sa_len != sizeof(struct sockaddr_in6))
 280                 return;
 281
 282         if ((unsigned)cmd >= PRC_NCMDS)
 283                 return;
 284         if (PRC_IS_REDIRECT(cmd))
 285                 notify = in6_rtchange, d = NULL;
 286         else if (cmd == PRC_HOSTDEAD)
 287                 d = NULL;
 288         else if (inet6ctlerrmap[cmd] == 0)
 289                 return;
 290
 291         /* if the parameter is from icmp6, decode it. */
 292         if (d != NULL) {
 293                 ip6cp = (struct ip6ctlparam *)d;
 294                 m = ip6cp->ip6c_m;
 295                 ip6 = ip6cp->ip6c_ip6;
 296                 off = ip6cp->ip6c_off;
 297                 sa6_src = ip6cp->ip6c_src;
 298         } else {
 299                 m = NULL;
 300                 ip6 = NULL;
 301                 sa6_src = &sa6_any;
 302         }
 303
 304         (void) in6_pcbnotify(&ripcbinfo, sa, 0, (const struct sockaddr *)sa6_src,
 305                              0, cmd, notify);
 306 }
 307
 308 /*
 309  * Generate IPv6 header and pass packet to ip6_output.
 310  * Tack on options user may have setup with control call.
 311  */
 312 int
 313 rip6_output(
 314         register struct mbuf *m,
 315         struct socket *so,
 316         struct sockaddr_in6 *dstsock,
 317         struct mbuf *control)
 318 {
 319         struct in6_addr *dst;
 320         struct ip6_hdr *ip6;
 321         struct inpcb *in6p;
 322         u_int   plen = m->m_pkthdr.len;
 323         int error = 0;
 324         struct ip6_pktopts opt, *optp = 0;
 325         struct ifnet *oifp = NULL;
 326         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 327         int priv = 0;
 328
 329         in6p = sotoin6pcb(so);
 330
 331         priv = 0;
 332         if (so->so_uid == 0)
 333                 priv = 1;
 334         dst = &dstsock->sin6_addr;
 335         if (control) {
 336                 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
 337                         goto bad;
 338                 optp = &opt;
 339         } else
 340                 optp = in6p->in6p_outputopts;
 341
 342         /*
 343          * For an ICMPv6 packet, we should know its type and code
 344          * to update statistics.
 345          */
 346         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 347                 struct icmp6_hdr *icmp6;
 348                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 349                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 350                         error = ENOBUFS;
 351                         goto bad;
 352                 }
 353                 icmp6 = mtod(m, struct icmp6_hdr *);
 354                 type = icmp6->icmp6_type;
 355                 code = icmp6->icmp6_code;
 356         }
 357
 358         M_PREPEND(m, sizeof(*ip6), M_WAIT);
 359         if (m == NULL) {
 360                 error = ENOBUFS;
 361                 goto bad;
 362         }
 363         ip6 = mtod(m, struct ip6_hdr *);
 364
 365         /*
 366          * Next header might not be ICMP6 but use its pseudo header anyway.
 367          */
 368         ip6->ip6_dst = *dst;
 369
 370         /*
 371          * If the scope of the destination is link-local, embed the interface
 372          * index in the address.
 373          *
 374          * XXX advanced-api value overrides sin6_scope_id
 375          */
 376         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 377                 struct in6_pktinfo *pi;
 378
 379                 /*
 380                  * XXX Boundary check is assumed to be already done in
 381                  * ip6_setpktoptions().
 382                  */
 383                 ifnet_head_lock_shared();
 384                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 385                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 386                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 387                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 388                          in6p->in6p_moptions &&
 389                          in6p->in6p_moptions->im6o_multicast_ifp) {
 390                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 391                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 392                 } else if (dstsock->sin6_scope_id) {
 393                         /*
 394                          * boundary check
 395                          *
 396                          * Sinced stsock->sin6_scope_id is unsigned, we don't
 397                          * need to check if it's < 0
 398                          */
 399                         if (if_index < dstsock->sin6_scope_id) {
 400                                 error = ENXIO;  /* XXX EINVAL? */
 401                                 ifnet_head_done();
 402                                 goto bad;
 403                         }
 404                         ip6->ip6_dst.s6_addr16[1]
 405                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 406                 }
 407                 ifnet_head_done();
 408         }
 409
 410         /*
 411          * Source address selection.
 412          */
 413         {
 414                 struct in6_addr *in6a;
 415                 struct in6_addr storage;
 416                 u_short index = 0;
 417                 if ((in6a = in6_selectsrc(dstsock, optp,
 418                                           in6p->in6p_moptions,
 419                                           &in6p->in6p_route,
 420                                           &in6p->in6p_laddr,
 421                                           &storage, &error)) == 0) {
 422                         if (error == 0)
 423                                 error = EADDRNOTAVAIL;
 424                         goto bad;
 425                 }
 426                 ip6->ip6_src = *in6a;
 427                 if (in6p->in6p_route.ro_rt != NULL) {
 428                         RT_LOCK(in6p->in6p_route.ro_rt);
 429                         if (in6p->in6p_route.ro_rt->rt_ifp != NULL)
 430                                 index = in6p->in6p_route.ro_rt->rt_ifp->if_index;
 431                         RT_UNLOCK(in6p->in6p_route.ro_rt);
 432                         ifnet_head_lock_shared();
 433                         if (index == 0 || if_index < index) {
 434                                 panic("bad if_index on interface from route");
 435                         }
 436                         oifp = ifindex2ifnet[index];
 437                         ifnet_head_done();
 438                 }
 439         }
 440         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 441                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 442         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 443                 (IPV6_VERSION & IPV6_VERSION_MASK);
 444         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 445         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 446         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 447
 448         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 449             in6p->in6p_cksum != -1) {
 450                 struct mbuf *n;
 451                 int off;
 452                 u_int16_t *p;
 453
 454                 /* compute checksum */
 455                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 456                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 457                 else
 458                         off = in6p->in6p_cksum;
 459                 if (plen < off + 1) {
 460                         error = EINVAL;
 461                         goto bad;
 462                 }
 463                 off += sizeof(struct ip6_hdr);
 464
 465                 n = m;
 466                 while (n && n->m_len <= off) {
 467                         off -= n->m_len;
 468                         n = n->m_next;
 469                 }
 470                 if (!n)
 471                         goto bad;
 472                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 473                 *p = 0;
 474                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 475         }
 476
 477 #if IPSEC
 478         if (ipsec_bypass == 0 && ipsec_setsocket(m, so) != 0) {
 479                 error = ENOBUFS;
 480                 goto bad;
 481         }
 482 #endif /*IPSEC*/
 483
 484         if (in6p->in6p_route.ro_rt != NULL &&
 485             in6p->in6p_route.ro_rt->generation_id != route_generation) {
 486                 rtfree(in6p->in6p_route.ro_rt);
 487                 in6p->in6p_route.ro_rt = NULL;
 488         }
 489
 490         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 491                            in6p->in6p_moptions, &oifp, 0);
 492         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 493                 if (oifp)
 494                         icmp6_ifoutstat_inc(oifp, type, code);
 495                 icmp6stat.icp6s_outhist[type]++;
 496         } else
 497                 rip6stat.rip6s_opackets++;
 498
 499         goto freectl;
 500
 501  bad:
 502         if (m)
 503                 m_freem(m);
 504
 505  freectl:
 506         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) {
 507                 rtfree(optp->ip6po_route.ro_rt);
 508                 optp->ip6po_route.ro_rt = NULL;
 509         }
 510         if (control) {
 511                 if (optp == &opt)
 512                         ip6_clearpktopts(optp, 0, -1);
 513                 m_freem(control);
 514         }
 515         return(error);
 516 }
 517
 518 #if IPFW2
 519 static void
 520 load_ip6fw(void)
 521 {
 522         ip6_fw_init();
 523 }
 524 #endif
 525
 526 /*
 527  * Raw IPv6 socket option processing.
 528  */
 529 int
 530 rip6_ctloutput(
 531         struct socket *so,
 532         struct sockopt *sopt)
 533 {
 534         int error;
 535
 536         if (sopt->sopt_level == IPPROTO_ICMPV6)
 537                 /*
 538                  * XXX: is it better to call icmp6_ctloutput() directly
 539                  * from protosw?
 540                  */
 541                 return(icmp6_ctloutput(so, sopt));
 542         else if (sopt->sopt_level != IPPROTO_IPV6)
 543                 return (EINVAL);
 544
 545         error = 0;
 546
 547         switch (sopt->sopt_dir) {
 548         case SOPT_GET:
 549                 switch (sopt->sopt_name) {
 550 #if IPFW2
 551                 case IPV6_FW_ADD:
 552                 case IPV6_FW_GET:
 553                         if (ip6_fw_ctl_ptr == 0)
 554                                 load_ip6fw();
 555                         if (ip6_fw_ctl_ptr)
 556                                 error = ip6_fw_ctl_ptr(sopt);
 557                         else
 558                                 error = ENOPROTOOPT;
 559                         break;
 560 #endif
 561
 562                 case MRT6_INIT:
 563                 case MRT6_DONE:
 564                 case MRT6_ADD_MIF:
 565                 case MRT6_DEL_MIF:
 566                 case MRT6_ADD_MFC:
 567                 case MRT6_DEL_MFC:
 568                 case MRT6_PIM:
 569                         error = ip6_mrouter_get(so, sopt);
 570                         break;
 571                 default:
 572                         error = ip6_ctloutput(so, sopt);
 573                         break;
 574                 }
 575                 break;
 576
 577         case SOPT_SET:
 578                 switch (sopt->sopt_name) {
 579 #if IPFW2
 580                 case IPV6_FW_ADD:
 581                 case IPV6_FW_DEL:
 582                 case IPV6_FW_FLUSH:
 583                 case IPV6_FW_ZERO:
 584                         if (ip6_fw_ctl_ptr == 0)
 585                                 load_ip6fw();
 586                         if (ip6_fw_ctl_ptr)
 587                                 error = ip6_fw_ctl_ptr(sopt);
 588                         else
 589                                 error = ENOPROTOOPT;
 590                         break;
 591 #endif
 592
 593                 case MRT6_INIT:
 594                 case MRT6_DONE:
 595                 case MRT6_ADD_MIF:
 596                 case MRT6_DEL_MIF:
 597                 case MRT6_ADD_MFC:
 598                 case MRT6_DEL_MFC:
 599                 case MRT6_PIM:
 600                         error = ip6_mrouter_set(so, sopt);
 601                         break;
 602                 default:
 603                         error = ip6_ctloutput(so, sopt);
 604                         break;
 605                 }
 606                 break;
 607         }
 608
 609         return (error);
 610 }
 611
 612 static int
 613 rip6_attach(struct socket *so, int proto, struct proc *p)
 614 {
 615         struct inpcb *inp;
 616         int error;
 617
 618         inp = sotoinpcb(so);
 619         if (inp)
 620                 panic("rip6_attach");
 621         if ((error = proc_suser(p)) != 0)
 622                 return error;
 623
 624         error = soreserve(so, rip_sendspace, rip_recvspace);
 625         if (error)
 626                 return error;
 627         error = in_pcballoc(so, &ripcbinfo, p);
 628         if (error)
 629                 return error;
 630         inp = (struct inpcb *)so->so_pcb;
 631         inp->inp_vflag |= INP_IPV6;
 632         inp->in6p_ip6_nxt = (char)proto;
 633         inp->in6p_hops = -1;    /* use kernel default */
 634         inp->in6p_cksum = -1;
 635         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 636                sizeof(struct icmp6_filter), M_PCB, M_WAITOK);
 637         if (inp->in6p_icmp6filt == NULL)
 638                 return (ENOMEM);
 639         ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 640         return 0;
 641 }
 642
 643 static int
 644 rip6_detach(struct socket *so)
 645 {
 646         struct inpcb *inp;
 647
 648         inp = sotoinpcb(so);
 649         if (inp == 0)
 650                 panic("rip6_detach");
 651         /* xxx: RSVP */
 652         if (so == ip6_mrouter)
 653                 ip6_mrouter_done();
 654         if (inp->in6p_icmp6filt) {
 655                 FREE(inp->in6p_icmp6filt, M_PCB);
 656                 inp->in6p_icmp6filt = NULL;
 657         }
 658         in6_pcbdetach(inp);
 659         return 0;
 660 }
 661
 662 static int
 663 rip6_abort(struct socket *so)
 664 {
 665         soisdisconnected(so);
 666         return rip6_detach(so);
 667 }
 668
 669 static int
 670 rip6_disconnect(struct socket *so)
 671 {
 672         struct inpcb *inp = sotoinpcb(so);
 673
 674         if ((so->so_state & SS_ISCONNECTED) == 0)
 675                 return ENOTCONN;
 676         inp->in6p_faddr = in6addr_any;
 677         return rip6_abort(so);
 678 }
 679
 680 static int
 681 rip6_bind(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
 682 {
 683         struct inpcb *inp = sotoinpcb(so);
 684         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 685         struct ifaddr *ia = NULL;
 686
 687         if (nam->sa_len != sizeof(*addr))
 688                 return EINVAL;
 689
 690         if (TAILQ_EMPTY(&ifnet_head) || addr->sin6_family != AF_INET6)
 691                 return EADDRNOTAVAIL;
 692 #if ENABLE_DEFAULT_SCOPE
 693         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 694                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 695         }
 696 #endif
 697         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 698             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
 699                 return EADDRNOTAVAIL;
 700         if (ia &&
 701             ((struct in6_ifaddr *)ia)->ia6_flags &
 702             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 703              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 704             if (ia) ifafree(ia);
 705                 return(EADDRNOTAVAIL);
 706         }
 707         if (ia != NULL)
 708                 ifafree(ia);
 709         inp->in6p_laddr = addr->sin6_addr;
 710         return 0;
 711 }
 712
 713 static int
 714 rip6_connect(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
 715 {
 716         struct inpcb *inp = sotoinpcb(so);
 717         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 718         struct in6_addr *in6a = NULL;
 719         struct in6_addr storage;
 720         int error = 0;
 721 #if ENABLE_DEFAULT_SCOPE
 722         struct sockaddr_in6 tmp;
 723 #endif
 724
 725         if (nam->sa_len != sizeof(*addr))
 726                 return EINVAL;
 727         if (TAILQ_EMPTY(&ifnet_head))
 728                 return EADDRNOTAVAIL;
 729         if (addr->sin6_family != AF_INET6)
 730                 return EAFNOSUPPORT;
 731 #if ENABLE_DEFAULT_SCOPE
 732         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 733                 /* avoid overwrites */
 734                 tmp = *addr;
 735                 addr = &tmp;
 736                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 737         }
 738 #endif
 739         /* Source address selection. XXX: need pcblookup? */
 740         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 741                              inp->in6p_moptions, &inp->in6p_route,
 742                              &inp->in6p_laddr, &storage, &error);
 743         if (in6a == NULL)
 744                 return (error ? error : EADDRNOTAVAIL);
 745         inp->in6p_laddr = *in6a;
 746         inp->in6p_faddr = addr->sin6_addr;
 747         soisconnected(so);
 748         return 0;
 749 }
 750
 751 static int
 752 rip6_shutdown(struct socket *so)
 753 {
 754         socantsendmore(so);
 755         return 0;
 756 }
 757
 758 static int
 759 rip6_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr *nam,
 760          struct mbuf *control, __unused struct proc *p)
 761 {
 762         struct inpcb *inp = sotoinpcb(so);
 763         struct sockaddr_in6 tmp;
 764         struct sockaddr_in6 *dst;
 765
 766         /* always copy sockaddr to avoid overwrites */
 767         if (so->so_state & SS_ISCONNECTED) {
 768                 if (nam) {
 769                         m_freem(m);
 770                         return EISCONN;
 771                 }
 772                 /* XXX */
 773                 bzero(&tmp, sizeof(tmp));
 774                 tmp.sin6_family = AF_INET6;
 775                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 776                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 777                       sizeof(struct in6_addr));
 778                 dst = &tmp;
 779         } else {
 780                 if (nam == NULL) {
 781                         m_freem(m);
 782                         return ENOTCONN;
 783                 }
 784                 tmp = *(struct sockaddr_in6 *)nam;
 785                 dst = &tmp;
 786         }
 787 #if ENABLE_DEFAULT_SCOPE
 788         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 789                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 790         }
 791 #endif
 792         return rip6_output(m, so, dst, control);
 793 }
 794
 795 struct pr_usrreqs rip6_usrreqs = {
 796         rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect,
 797         pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
 798         pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
 799         pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown,
 800         in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
 801 };
 802
 803 __private_extern__ struct pr_usrreqs icmp6_dgram_usrreqs = {
 804         rip6_abort, pru_accept_notsupp, icmp6_dgram_attach, rip6_bind, rip6_connect,
 805         pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
 806         pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
 807         pru_rcvoob_notsupp, icmp6_dgram_send, pru_sense_null, rip6_shutdown,
 808         in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
 809 };
 810
 811
 812