sys/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 1.7.2.7 2003/01/24 05:11:35 sam Exp $
  30  * $DragonFly: src/sys/netinet6/raw_ip6.c,v 1.27 2008/09/04 09:08:22 hasso Exp $
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1988, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  66  */
  67
  68 #include "opt_ipsec.h"
  69 #include "opt_inet6.h"
  70
  71 #include <sys/param.h>
  72 #include <sys/malloc.h>
  73 #include <sys/proc.h>
  74 #include <sys/priv.h>
  75 #include <sys/mbuf.h>
  76 #include <sys/socket.h>
  77 #include <sys/jail.h>
  78 #include <sys/protosw.h>
  79 #include <sys/socketvar.h>
  80 #include <sys/errno.h>
  81 #include <sys/systm.h>
  82 #include <sys/thread2.h>
  83
  84 #include <net/if.h>
  85 #include <net/route.h>
  86 #include <net/if_types.h>
  87
  88 #include <netinet/in.h>
  89 #include <netinet/in_var.h>
  90 #include <netinet/in_systm.h>
  91 #include <netinet/ip6.h>
  92 #include <netinet6/ip6_var.h>
  93 #include <netinet6/ip6_mroute.h>
  94 #include <netinet/icmp6.h>
  95 #include <netinet/in_pcb.h>
  96 #include <netinet6/in6_pcb.h>
  97 #include <netinet6/nd6.h>
  98 #include <netinet6/ip6protosw.h>
  99 #ifdef ENABLE_DEFAULT_SCOPE
 100 #include <netinet6/scope6_var.h>
 101 #endif
 102 #include <netinet6/raw_ip6.h>
 103
 104 #ifdef IPSEC
 105 #include <netinet6/ipsec.h>
 106 #include <netinet6/ipsec6.h>
 107 #endif /*IPSEC*/
 108
 109 #ifdef FAST_IPSEC
 110 #include <netproto/ipsec/ipsec.h>
 111 #include <netproto/ipsec/ipsec6.h>
 112 #endif /* FAST_IPSEC */
 113
 114 #include <machine/stdarg.h>
 115
 116 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 117 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 118
 119 /*
 120  * Raw interface to IP6 protocol.
 121  */
 122
 123 extern struct   inpcbinfo ripcbinfo;
 124 extern u_long   rip_sendspace;
 125 extern u_long   rip_recvspace;
 126
 127 struct rip6stat rip6stat;
 128
 129 /*
 130  * Setup generic address and protocol structures
 131  * for raw_input routine, then pass them along with
 132  * mbuf chain.
 133  */
 134 int
 135 rip6_input(struct mbuf **mp, int *offp, int proto)
 136 {
 137         struct mbuf *m = *mp;
 138         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 139         struct inpcb *in6p;
 140         struct inpcb *last = 0;
 141         struct mbuf *opts = NULL;
 142         struct sockaddr_in6 rip6src;
 143
 144         rip6stat.rip6s_ipackets++;
 145
 146         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 147                 /* XXX send icmp6 host/port unreach? */
 148                 m_freem(m);
 149                 return IPPROTO_DONE;
 150         }
 151
 152         init_sin6(&rip6src, m); /* general init */
 153
 154         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 155                 if (in6p->in6p_flags & INP_PLACEMARKER)
 156                         continue;
 157                 if (!(in6p->in6p_vflag & INP_IPV6))
 158                         continue;
 159                 if (in6p->in6p_ip6_nxt &&
 160                     in6p->in6p_ip6_nxt != proto)
 161                         continue;
 162                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 163                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 164                         continue;
 165                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 166                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 167                         continue;
 168                 if (in6p->in6p_cksum != -1) {
 169                         rip6stat.rip6s_isum++;
 170                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 171                             m->m_pkthdr.len - *offp)) {
 172                                 rip6stat.rip6s_badsum++;
 173                                 continue;
 174                         }
 175                 }
 176                 if (last) {
 177                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 178
 179 #ifdef IPSEC
 180                         /*
 181                          * Check AH/ESP integrity.
 182                          */
 183                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 184                                 m_freem(n);
 185                                 ipsec6stat.in_polvio++;
 186                                 /* do not inject data into pcb */
 187                         } else
 188 #endif /*IPSEC*/
 189 #ifdef FAST_IPSEC
 190                         /*
 191                          * Check AH/ESP integrity.
 192                          */
 193                         if (n && ipsec6_in_reject(n, last)) {
 194                                 m_freem(n);
 195                                 /* do not inject data into pcb */
 196                         } else
 197 #endif /*FAST_IPSEC*/
 198                         if (n) {
 199                                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 200                                     last->in6p_socket->so_options & SO_TIMESTAMP)
 201                                         ip6_savecontrol(last, &opts, ip6, n);
 202                                 /* strip intermediate headers */
 203                                 m_adj(n, *offp);
 204                                 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
 205                                                 (struct sockaddr *)&rip6src,
 206                                                  n, opts) == 0) {
 207                                         m_freem(n);
 208                                         if (opts)
 209                                                 m_freem(opts);
 210                                         rip6stat.rip6s_fullsock++;
 211                                 } else
 212                                         sorwakeup(last->in6p_socket);
 213                                 opts = NULL;
 214                         }
 215                 }
 216                 last = in6p;
 217         }
 218 #ifdef IPSEC
 219         /*
 220          * Check AH/ESP integrity.
 221          */
 222         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 223                 m_freem(m);
 224                 ipsec6stat.in_polvio++;
 225                 ip6stat.ip6s_delivered--;
 226                 /* do not inject data into pcb */
 227         } else
 228 #endif /*IPSEC*/
 229 #ifdef FAST_IPSEC
 230         /*
 231          * Check AH/ESP integrity.
 232          */
 233         if (last && ipsec6_in_reject(m, last)) {
 234                 m_freem(m);
 235                 ip6stat.ip6s_delivered--;
 236                 /* do not inject data into pcb */
 237         } else
 238 #endif /*FAST_IPSEC*/
 239         if (last) {
 240                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 241                     last->in6p_socket->so_options & SO_TIMESTAMP)
 242                         ip6_savecontrol(last, &opts, ip6, m);
 243                 /* strip intermediate headers */
 244                 m_adj(m, *offp);
 245                 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
 246                                 (struct sockaddr *)&rip6src, m, opts) == 0) {
 247                         m_freem(m);
 248                         if (opts)
 249                                 m_freem(opts);
 250                         rip6stat.rip6s_fullsock++;
 251                 } else
 252                         sorwakeup(last->in6p_socket);
 253         } else {
 254                 rip6stat.rip6s_nosock++;
 255                 if (m->m_flags & M_MCAST)
 256                         rip6stat.rip6s_nosockmcast++;
 257                 if (proto == IPPROTO_NONE)
 258                         m_freem(m);
 259                 else {
 260                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 261                         icmp6_error(m, ICMP6_PARAM_PROB,
 262                                     ICMP6_PARAMPROB_NEXTHEADER,
 263                                     prvnxtp - mtod(m, char *));
 264                 }
 265                 ip6stat.ip6s_delivered--;
 266         }
 267         return IPPROTO_DONE;
 268 }
 269
 270 void
 271 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
 272 {
 273         struct ip6_hdr *ip6;
 274         struct mbuf *m;
 275         int off = 0;
 276         struct ip6ctlparam *ip6cp = NULL;
 277         const struct sockaddr_in6 *sa6_src = NULL;
 278         void (*notify) (struct inpcb *, int) = in6_rtchange;
 279
 280         if (sa->sa_family != AF_INET6 ||
 281             sa->sa_len != sizeof(struct sockaddr_in6))
 282                 return;
 283
 284         if ((unsigned)cmd >= PRC_NCMDS)
 285                 return;
 286         if (PRC_IS_REDIRECT(cmd))
 287                 notify = in6_rtchange, d = NULL;
 288         else if (cmd == PRC_HOSTDEAD)
 289                 d = NULL;
 290         else if (inet6ctlerrmap[cmd] == 0)
 291                 return;
 292
 293         /* if the parameter is from icmp6, decode it. */
 294         if (d != NULL) {
 295                 ip6cp = (struct ip6ctlparam *)d;
 296                 m = ip6cp->ip6c_m;
 297                 ip6 = ip6cp->ip6c_ip6;
 298                 off = ip6cp->ip6c_off;
 299                 sa6_src = ip6cp->ip6c_src;
 300         } else {
 301                 m = NULL;
 302                 ip6 = NULL;
 303                 sa6_src = &sa6_any;
 304         }
 305
 306         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
 307                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 308 }
 309
 310 /*
 311  * Generate IPv6 header and pass packet to ip6_output.
 312  * Tack on options user may have setup with control call.
 313  */
 314 int
 315 rip6_output(struct mbuf *m, struct socket *so, ...)
 316 {
 317         struct sockaddr_in6 *dstsock;
 318         struct mbuf *control;
 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         __va_list ap;
 329
 330         __va_start(ap, so);
 331         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 332         control = __va_arg(ap, struct mbuf *);
 333         __va_end(ap);
 334
 335         in6p = so->so_pcb;
 336
 337         priv = 0;
 338         if (so->so_cred->cr_uid == 0)
 339                 priv = 1;
 340         dst = &dstsock->sin6_addr;
 341         if (control) {
 342                 if ((error = ip6_setpktoptions(control, &opt,
 343                     in6p->in6p_outputopts,
 344                     so->so_proto->pr_protocol, priv)) != 0)
 345                         goto bad;
 346                 optp = &opt;
 347         } else
 348                 optp = in6p->in6p_outputopts;
 349
 350         /*
 351          * For an ICMPv6 packet, we should know its type and code
 352          * to update statistics.
 353          */
 354         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 355                 struct icmp6_hdr *icmp6;
 356                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 357                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 358                         error = ENOBUFS;
 359                         goto bad;
 360                 }
 361                 icmp6 = mtod(m, struct icmp6_hdr *);
 362                 type = icmp6->icmp6_type;
 363                 code = icmp6->icmp6_code;
 364         }
 365
 366         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 367         ip6 = mtod(m, struct ip6_hdr *);
 368
 369         /*
 370          * Next header might not be ICMP6 but use its pseudo header anyway.
 371          */
 372         ip6->ip6_dst = *dst;
 373
 374         /*
 375          * If the scope of the destination is link-local, embed the interface
 376          * index in the address.
 377          *
 378          * XXX advanced-api value overrides sin6_scope_id
 379          */
 380         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 381                 struct in6_pktinfo *pi;
 382
 383                 /*
 384                  * XXX Boundary check is assumed to be already done in
 385                  * ip6_setpktoptions().
 386                  */
 387                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 388                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 389                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 390                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 391                          in6p->in6p_moptions &&
 392                          in6p->in6p_moptions->im6o_multicast_ifp) {
 393                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 394                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 395                 } else if (dstsock->sin6_scope_id) {
 396                         /* boundary check */
 397                         if (dstsock->sin6_scope_id < 0
 398                          || if_index < dstsock->sin6_scope_id) {
 399                                 error = ENXIO;  /* XXX EINVAL? */
 400                                 goto bad;
 401                         }
 402                         ip6->ip6_dst.s6_addr16[1]
 403                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 404                 }
 405         }
 406
 407         /*
 408          * Source address selection.
 409          */
 410         {
 411                 struct in6_addr *in6a;
 412
 413                 if ((in6a = in6_selectsrc(dstsock, optp,
 414                                           in6p->in6p_moptions,
 415                                           &in6p->in6p_route,
 416                                           &in6p->in6p_laddr,
 417                                           &error, NULL)) == NULL) {
 418                         if (error == 0)
 419                                 error = EADDRNOTAVAIL;
 420                         goto bad;
 421                 }
 422                 ip6->ip6_src = *in6a;
 423                 if (in6p->in6p_route.ro_rt)
 424                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 425         }
 426         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 427                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 428         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 429                 (IPV6_VERSION & IPV6_VERSION_MASK);
 430         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 431         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 432         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 433
 434         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 435             in6p->in6p_cksum != -1) {
 436                 struct mbuf *n;
 437                 int off;
 438                 u_int16_t *p;
 439
 440                 /* compute checksum */
 441                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 442                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 443                 else
 444                         off = in6p->in6p_cksum;
 445                 if (plen < off + 1) {
 446                         error = EINVAL;
 447                         goto bad;
 448                 }
 449                 off += sizeof(struct ip6_hdr);
 450
 451                 n = m;
 452                 while (n && n->m_len <= off) {
 453                         off -= n->m_len;
 454                         n = n->m_next;
 455                 }
 456                 if (!n)
 457                         goto bad;
 458                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 459                 *p = 0;
 460                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 461         }
 462
 463         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 464                            in6p->in6p_moptions, &oifp, in6p);
 465         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 466                 if (oifp)
 467                         icmp6_ifoutstat_inc(oifp, type, code);
 468                 icmp6stat.icp6s_outhist[type]++;
 469         } else
 470                 rip6stat.rip6s_opackets++;
 471
 472         goto freectl;
 473
 474 bad:
 475         if (m)
 476                 m_freem(m);
 477
 478 freectl:
 479         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 480                 RTFREE(optp->ip6po_route.ro_rt);
 481         if (control) {
 482                 if (optp == &opt)
 483                         ip6_clearpktopts(optp, -1);
 484                 m_freem(control);
 485         }
 486         return (error);
 487 }
 488
 489 /*
 490  * Raw IPv6 socket option processing.
 491  */
 492 int
 493 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
 494 {
 495         int error;
 496
 497         if (sopt->sopt_level == IPPROTO_ICMPV6)
 498                 /*
 499                  * XXX: is it better to call icmp6_ctloutput() directly
 500                  * from protosw?
 501                  */
 502                 return (icmp6_ctloutput(so, sopt));
 503         else if (sopt->sopt_level != IPPROTO_IPV6)
 504                 return (EINVAL);
 505
 506         error = 0;
 507
 508         switch (sopt->sopt_dir) {
 509         case SOPT_GET:
 510                 switch (sopt->sopt_name) {
 511                 case MRT6_INIT:
 512                 case MRT6_DONE:
 513                 case MRT6_ADD_MIF:
 514                 case MRT6_DEL_MIF:
 515                 case MRT6_ADD_MFC:
 516                 case MRT6_DEL_MFC:
 517                 case MRT6_PIM:
 518                         error = ip6_mrouter_get(so, sopt);
 519                         break;
 520                 case IPV6_CHECKSUM:
 521                         error = ip6_raw_ctloutput(so, sopt);
 522                         break;
 523                 default:
 524                         error = ip6_ctloutput(so, sopt);
 525                         break;
 526                 }
 527                 break;
 528
 529         case SOPT_SET:
 530                 switch (sopt->sopt_name) {
 531                 case MRT6_INIT:
 532                 case MRT6_DONE:
 533                 case MRT6_ADD_MIF:
 534                 case MRT6_DEL_MIF:
 535                 case MRT6_ADD_MFC:
 536                 case MRT6_DEL_MFC:
 537                 case MRT6_PIM:
 538                         error = ip6_mrouter_set(so, sopt);
 539                         break;
 540                 case IPV6_CHECKSUM:
 541                         error = ip6_raw_ctloutput(so, sopt);
 542                         break;
 543                 default:
 544                         error = ip6_ctloutput(so, sopt);
 545                         break;
 546                 }
 547                 break;
 548         }
 549
 550         return (error);
 551 }
 552
 553 static int
 554 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 555 {
 556         struct inpcb *inp;
 557         int error;
 558         int flag;
 559
 560         if (jailed(ai->p_ucred) && jail_allow_raw_sockets)
 561                 flag = NULL_CRED_OKAY | PRISON_ROOT;
 562         else
 563                 flag = NULL_CRED_OKAY;
 564
 565         inp = so->so_pcb;
 566         if (inp)
 567                 panic("rip6_attach");
 568         if ((error = priv_check_cred(ai->p_ucred, PRIV_ROOT, flag)) != 0)
 569                 return error;
 570
 571         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 572         if (error)
 573                 return error;
 574         crit_enter();
 575         error = in_pcballoc(so, &ripcbinfo);
 576         crit_exit();
 577         if (error)
 578                 return error;
 579         inp = (struct inpcb *)so->so_pcb;
 580         inp->inp_vflag |= INP_IPV6;
 581         inp->in6p_ip6_nxt = (long)proto;
 582         inp->in6p_hops = -1;    /* use kernel default */
 583         inp->in6p_cksum = -1;
 584         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 585                sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
 586         if (inp->in6p_icmp6filt != NULL)
 587                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 588         return 0;
 589 }
 590
 591 static int
 592 rip6_detach(struct socket *so)
 593 {
 594         struct inpcb *inp;
 595
 596         inp = so->so_pcb;
 597         if (inp == NULL)
 598                 panic("rip6_detach");
 599         /* xxx: RSVP */
 600         if (so == ip6_mrouter)
 601                 ip6_mrouter_done();
 602         if (inp->in6p_icmp6filt) {
 603                 FREE(inp->in6p_icmp6filt, M_PCB);
 604                 inp->in6p_icmp6filt = NULL;
 605         }
 606         in6_pcbdetach(inp);
 607         return 0;
 608 }
 609
 610 static int
 611 rip6_abort(struct socket *so)
 612 {
 613         soisdisconnected(so);
 614         return rip6_detach(so);
 615 }
 616
 617 static int
 618 rip6_disconnect(struct socket *so)
 619 {
 620         struct inpcb *inp = so->so_pcb;
 621
 622         if (!(so->so_state & SS_ISCONNECTED))
 623                 return ENOTCONN;
 624         inp->in6p_faddr = kin6addr_any;
 625         return rip6_abort(so);
 626 }
 627
 628 static int
 629 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 630 {
 631         struct inpcb *inp = so->so_pcb;
 632         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 633         struct ifaddr *ia = NULL;
 634
 635         if (nam->sa_len != sizeof(*addr))
 636                 return EINVAL;
 637
 638         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
 639                 return EADDRNOTAVAIL;
 640 #ifdef ENABLE_DEFAULT_SCOPE
 641         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 642                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 643         }
 644 #endif
 645         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 646             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL)
 647                 return EADDRNOTAVAIL;
 648         if (ia &&
 649             ((struct in6_ifaddr *)ia)->ia6_flags &
 650             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 651              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 652                 return (EADDRNOTAVAIL);
 653         }
 654         inp->in6p_laddr = addr->sin6_addr;
 655         return 0;
 656 }
 657
 658 static int
 659 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 660 {
 661         struct inpcb *inp = so->so_pcb;
 662         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 663         struct in6_addr *in6a = NULL;
 664         int error = 0;
 665 #ifdef ENABLE_DEFAULT_SCOPE
 666         struct sockaddr_in6 tmp;
 667 #endif
 668
 669         if (nam->sa_len != sizeof(*addr))
 670                 return EINVAL;
 671         if (TAILQ_EMPTY(&ifnet))
 672                 return EADDRNOTAVAIL;
 673         if (addr->sin6_family != AF_INET6)
 674                 return EAFNOSUPPORT;
 675 #ifdef ENABLE_DEFAULT_SCOPE
 676         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 677                 /* avoid overwrites */
 678                 tmp = *addr;
 679                 addr = &tmp;
 680                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 681         }
 682 #endif
 683         /* Source address selection. XXX: need pcblookup? */
 684         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 685                              inp->in6p_moptions, &inp->in6p_route,
 686                              &inp->in6p_laddr, &error, NULL);
 687         if (in6a == NULL)
 688                 return (error ? error : EADDRNOTAVAIL);
 689         inp->in6p_laddr = *in6a;
 690         inp->in6p_faddr = addr->sin6_addr;
 691         soisconnected(so);
 692         return 0;
 693 }
 694
 695 static int
 696 rip6_shutdown(struct socket *so)
 697 {
 698         socantsendmore(so);
 699         return 0;
 700 }
 701
 702 static int
 703 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 704           struct mbuf *control, struct thread *td)
 705 {
 706         struct inpcb *inp = so->so_pcb;
 707         struct sockaddr_in6 tmp;
 708         struct sockaddr_in6 *dst;
 709
 710         /* always copy sockaddr to avoid overwrites */
 711         if (so->so_state & SS_ISCONNECTED) {
 712                 if (nam) {
 713                         m_freem(m);
 714                         return EISCONN;
 715                 }
 716                 /* XXX */
 717                 bzero(&tmp, sizeof(tmp));
 718                 tmp.sin6_family = AF_INET6;
 719                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 720                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 721                       sizeof(struct in6_addr));
 722                 dst = &tmp;
 723         } else {
 724                 if (nam == NULL) {
 725                         m_freem(m);
 726                         return ENOTCONN;
 727                 }
 728                 tmp = *(struct sockaddr_in6 *)nam;
 729                 dst = &tmp;
 730         }
 731 #ifdef ENABLE_DEFAULT_SCOPE
 732         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 733                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 734         }
 735 #endif
 736         return rip6_output(m, so, dst, control);
 737 }
 738
 739 struct pr_usrreqs rip6_usrreqs = {
 740         .pru_abort = rip6_abort,
 741         .pru_accept = pru_accept_notsupp,
 742         .pru_attach = rip6_attach,
 743         .pru_bind = rip6_bind,
 744         .pru_connect = rip6_connect,
 745         .pru_connect2 = pru_connect2_notsupp,
 746         .pru_control = in6_control,
 747         .pru_detach = rip6_detach,
 748         .pru_disconnect = rip6_disconnect,
 749         .pru_listen = pru_listen_notsupp,
 750         .pru_peeraddr = in6_setpeeraddr,
 751         .pru_rcvd = pru_rcvd_notsupp,
 752         .pru_rcvoob = pru_rcvoob_notsupp,
 753         .pru_send = rip6_send,
 754         .pru_sense = pru_sense_null,
 755         .pru_shutdown = rip6_shutdown,
 756         .pru_sockaddr = in6_setsockaddr,
 757         .pru_sosend = sosend,
 758         .pru_soreceive = soreceive,
 759         .pru_sopoll = sopoll
 760 };