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 1.25 2007/04/22 01:13:14 dillon 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/mbuf.h>
  75 #include <sys/socket.h>
  76 #include <sys/protosw.h>
  77 #include <sys/socketvar.h>
  78 #include <sys/errno.h>
  79 #include <sys/systm.h>
  80 #include <sys/thread2.h>
  81
  82 #include <net/if.h>
  83 #include <net/route.h>
  84 #include <net/if_types.h>
  85
  86 #include <netinet/in.h>
  87 #include <netinet/in_var.h>
  88 #include <netinet/in_systm.h>
  89 #include <netinet/ip6.h>
  90 #include <netinet6/ip6_var.h>
  91 #include <netinet6/ip6_mroute.h>
  92 #include <netinet/icmp6.h>
  93 #include <netinet/in_pcb.h>
  94 #include <netinet6/in6_pcb.h>
  95 #include <netinet6/nd6.h>
  96 #include <netinet6/ip6protosw.h>
  97 #ifdef ENABLE_DEFAULT_SCOPE
  98 #include <netinet6/scope6_var.h>
  99 #endif
 100 #include <netinet6/raw_ip6.h>
 101
 102 #ifdef IPSEC
 103 #include <netinet6/ipsec.h>
 104 #include <netinet6/ipsec6.h>
 105 #endif /*IPSEC*/
 106
 107 #ifdef FAST_IPSEC
 108 #include <netproto/ipsec/ipsec.h>
 109 #include <netproto/ipsec/ipsec6.h>
 110 #endif /* FAST_IPSEC */
 111
 112 #include <machine/stdarg.h>
 113
 114 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 115 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 116
 117 /*
 118  * Raw interface to IP6 protocol.
 119  */
 120
 121 extern struct   inpcbinfo ripcbinfo;
 122 extern u_long   rip_sendspace;
 123 extern u_long   rip_recvspace;
 124
 125 struct rip6stat rip6stat;
 126
 127 /*
 128  * Setup generic address and protocol structures
 129  * for raw_input routine, then pass them along with
 130  * mbuf chain.
 131  */
 132 int
 133 rip6_input(struct mbuf **mp, int *offp, int proto)
 134 {
 135         struct mbuf *m = *mp;
 136         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 137         struct inpcb *in6p;
 138         struct inpcb *last = 0;
 139         struct mbuf *opts = NULL;
 140         struct sockaddr_in6 rip6src;
 141
 142         rip6stat.rip6s_ipackets++;
 143
 144         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 145                 /* XXX send icmp6 host/port unreach? */
 146                 m_freem(m);
 147                 return IPPROTO_DONE;
 148         }
 149
 150         init_sin6(&rip6src, m); /* general init */
 151
 152         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 153                 if (in6p->in6p_flags & INP_PLACEMARKER)
 154                         continue;
 155                 if (!(in6p->in6p_vflag & INP_IPV6))
 156                         continue;
 157                 if (in6p->in6p_ip6_nxt &&
 158                     in6p->in6p_ip6_nxt != proto)
 159                         continue;
 160                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 161                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 162                         continue;
 163                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 164                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 165                         continue;
 166                 if (in6p->in6p_cksum != -1) {
 167                         rip6stat.rip6s_isum++;
 168                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 169                             m->m_pkthdr.len - *offp)) {
 170                                 rip6stat.rip6s_badsum++;
 171                                 continue;
 172                         }
 173                 }
 174                 if (last) {
 175                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 176
 177 #ifdef IPSEC
 178                         /*
 179                          * Check AH/ESP integrity.
 180                          */
 181                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 182                                 m_freem(n);
 183                                 ipsec6stat.in_polvio++;
 184                                 /* do not inject data into pcb */
 185                         } else
 186 #endif /*IPSEC*/
 187 #ifdef FAST_IPSEC
 188                         /*
 189                          * Check AH/ESP integrity.
 190                          */
 191                         if (n && ipsec6_in_reject(n, last)) {
 192                                 m_freem(n);
 193                                 /* do not inject data into pcb */
 194                         } else
 195 #endif /*FAST_IPSEC*/
 196                         if (n) {
 197                                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 198                                     last->in6p_socket->so_options & SO_TIMESTAMP)
 199                                         ip6_savecontrol(last, &opts, ip6, n);
 200                                 /* strip intermediate headers */
 201                                 m_adj(n, *offp);
 202                                 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
 203                                                 (struct sockaddr *)&rip6src,
 204                                                  n, opts) == 0) {
 205                                         m_freem(n);
 206                                         if (opts)
 207                                                 m_freem(opts);
 208                                         rip6stat.rip6s_fullsock++;
 209                                 } else
 210                                         sorwakeup(last->in6p_socket);
 211                                 opts = NULL;
 212                         }
 213                 }
 214                 last = in6p;
 215         }
 216 #ifdef IPSEC
 217         /*
 218          * Check AH/ESP integrity.
 219          */
 220         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 221                 m_freem(m);
 222                 ipsec6stat.in_polvio++;
 223                 ip6stat.ip6s_delivered--;
 224                 /* do not inject data into pcb */
 225         } else
 226 #endif /*IPSEC*/
 227 #ifdef FAST_IPSEC
 228         /*
 229          * Check AH/ESP integrity.
 230          */
 231         if (last && ipsec6_in_reject(m, last)) {
 232                 m_freem(m);
 233                 ip6stat.ip6s_delivered--;
 234                 /* do not inject data into pcb */
 235         } else
 236 #endif /*FAST_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 (ssb_appendaddr(&last->in6p_socket->so_rcv,
 244                                 (struct sockaddr *)&rip6src, m, opts) == 0) {
 245                         m_freem(m);
 246                         if (opts)
 247                                 m_freem(opts);
 248                         rip6stat.rip6s_fullsock++;
 249                 } else
 250                         sorwakeup(last->in6p_socket);
 251         } else {
 252                 rip6stat.rip6s_nosock++;
 253                 if (m->m_flags & M_MCAST)
 254                         rip6stat.rip6s_nosockmcast++;
 255                 if (proto == IPPROTO_NONE)
 256                         m_freem(m);
 257                 else {
 258                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 259                         icmp6_error(m, ICMP6_PARAM_PROB,
 260                                     ICMP6_PARAMPROB_NEXTHEADER,
 261                                     prvnxtp - mtod(m, char *));
 262                 }
 263                 ip6stat.ip6s_delivered--;
 264         }
 265         return IPPROTO_DONE;
 266 }
 267
 268 void
 269 rip6_ctlinput(int cmd, struct sockaddr *sa, 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         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
 305                       (const struct sockaddr *)sa6_src, 0, cmd, 0, 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(struct mbuf *m, struct socket *so, ...)
 314 {
 315         struct sockaddr_in6 *dstsock;
 316         struct mbuf *control;
 317         struct in6_addr *dst;
 318         struct ip6_hdr *ip6;
 319         struct inpcb *in6p;
 320         u_int   plen = m->m_pkthdr.len;
 321         int error = 0;
 322         struct ip6_pktopts opt, *optp = 0;
 323         struct ifnet *oifp = NULL;
 324         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 325         int priv = 0;
 326         __va_list ap;
 327
 328         __va_start(ap, so);
 329         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 330         control = __va_arg(ap, struct mbuf *);
 331         __va_end(ap);
 332
 333         in6p = so->so_pcb;
 334
 335         priv = 0;
 336         if (so->so_cred->cr_uid == 0)
 337                 priv = 1;
 338         dst = &dstsock->sin6_addr;
 339         if (control) {
 340                 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
 341                         goto bad;
 342                 optp = &opt;
 343         } else
 344                 optp = in6p->in6p_outputopts;
 345
 346         /*
 347          * For an ICMPv6 packet, we should know its type and code
 348          * to update statistics.
 349          */
 350         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 351                 struct icmp6_hdr *icmp6;
 352                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 353                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 354                         error = ENOBUFS;
 355                         goto bad;
 356                 }
 357                 icmp6 = mtod(m, struct icmp6_hdr *);
 358                 type = icmp6->icmp6_type;
 359                 code = icmp6->icmp6_code;
 360         }
 361
 362         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 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                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 384                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 385                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 386                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 387                          in6p->in6p_moptions &&
 388                          in6p->in6p_moptions->im6o_multicast_ifp) {
 389                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 390                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 391                 } else if (dstsock->sin6_scope_id) {
 392                         /* boundary check */
 393                         if (dstsock->sin6_scope_id < 0
 394                          || if_index < dstsock->sin6_scope_id) {
 395                                 error = ENXIO;  /* XXX EINVAL? */
 396                                 goto bad;
 397                         }
 398                         ip6->ip6_dst.s6_addr16[1]
 399                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 400                 }
 401         }
 402
 403         /*
 404          * Source address selection.
 405          */
 406         {
 407                 struct in6_addr *in6a;
 408
 409                 if ((in6a = in6_selectsrc(dstsock, optp,
 410                                           in6p->in6p_moptions,
 411                                           &in6p->in6p_route,
 412                                           &in6p->in6p_laddr,
 413                                           &error, NULL)) == NULL) {
 414                         if (error == 0)
 415                                 error = EADDRNOTAVAIL;
 416                         goto bad;
 417                 }
 418                 ip6->ip6_src = *in6a;
 419                 if (in6p->in6p_route.ro_rt)
 420                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 421         }
 422         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 423                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 424         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 425                 (IPV6_VERSION & IPV6_VERSION_MASK);
 426         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 427         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 428         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 429
 430         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 431             in6p->in6p_cksum != -1) {
 432                 struct mbuf *n;
 433                 int off;
 434                 u_int16_t *p;
 435
 436                 /* compute checksum */
 437                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 438                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 439                 else
 440                         off = in6p->in6p_cksum;
 441                 if (plen < off + 1) {
 442                         error = EINVAL;
 443                         goto bad;
 444                 }
 445                 off += sizeof(struct ip6_hdr);
 446
 447                 n = m;
 448                 while (n && n->m_len <= off) {
 449                         off -= n->m_len;
 450                         n = n->m_next;
 451                 }
 452                 if (!n)
 453                         goto bad;
 454                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 455                 *p = 0;
 456                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 457         }
 458
 459         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 460                            in6p->in6p_moptions, &oifp, in6p);
 461         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 462                 if (oifp)
 463                         icmp6_ifoutstat_inc(oifp, type, code);
 464                 icmp6stat.icp6s_outhist[type]++;
 465         } else
 466                 rip6stat.rip6s_opackets++;
 467
 468         goto freectl;
 469
 470 bad:
 471         if (m)
 472                 m_freem(m);
 473
 474 freectl:
 475         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 476                 RTFREE(optp->ip6po_route.ro_rt);
 477         if (control) {
 478                 if (optp == &opt)
 479                         ip6_clearpktopts(optp, 0, -1);
 480                 m_freem(control);
 481         }
 482         return (error);
 483 }
 484
 485 /*
 486  * Raw IPv6 socket option processing.
 487  */
 488 int
 489 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
 490 {
 491         int error;
 492
 493         if (sopt->sopt_level == IPPROTO_ICMPV6)
 494                 /*
 495                  * XXX: is it better to call icmp6_ctloutput() directly
 496                  * from protosw?
 497                  */
 498                 return (icmp6_ctloutput(so, sopt));
 499         else if (sopt->sopt_level != IPPROTO_IPV6)
 500                 return (EINVAL);
 501
 502         error = 0;
 503
 504         switch (sopt->sopt_dir) {
 505         case SOPT_GET:
 506                 switch (sopt->sopt_name) {
 507                 case MRT6_INIT:
 508                 case MRT6_DONE:
 509                 case MRT6_ADD_MIF:
 510                 case MRT6_DEL_MIF:
 511                 case MRT6_ADD_MFC:
 512                 case MRT6_DEL_MFC:
 513                 case MRT6_PIM:
 514                         error = ip6_mrouter_get(so, sopt);
 515                         break;
 516                 default:
 517                         error = ip6_ctloutput(so, sopt);
 518                         break;
 519                 }
 520                 break;
 521
 522         case SOPT_SET:
 523                 switch (sopt->sopt_name) {
 524                 case MRT6_INIT:
 525                 case MRT6_DONE:
 526                 case MRT6_ADD_MIF:
 527                 case MRT6_DEL_MIF:
 528                 case MRT6_ADD_MFC:
 529                 case MRT6_DEL_MFC:
 530                 case MRT6_PIM:
 531                         error = ip6_mrouter_set(so, sopt);
 532                         break;
 533                 default:
 534                         error = ip6_ctloutput(so, sopt);
 535                         break;
 536                 }
 537                 break;
 538         }
 539
 540         return (error);
 541 }
 542
 543 static int
 544 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 545 {
 546         struct inpcb *inp;
 547         int error;
 548
 549         inp = so->so_pcb;
 550         if (inp)
 551                 panic("rip6_attach");
 552         if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0)
 553                 return error;
 554
 555         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 556         if (error)
 557                 return error;
 558         crit_enter();
 559         error = in_pcballoc(so, &ripcbinfo);
 560         crit_exit();
 561         if (error)
 562                 return error;
 563         inp = (struct inpcb *)so->so_pcb;
 564         inp->inp_vflag |= INP_IPV6;
 565         inp->in6p_ip6_nxt = (long)proto;
 566         inp->in6p_hops = -1;    /* use kernel default */
 567         inp->in6p_cksum = -1;
 568         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 569                sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
 570         if (inp->in6p_icmp6filt != NULL)
 571                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 572         return 0;
 573 }
 574
 575 static int
 576 rip6_detach(struct socket *so)
 577 {
 578         struct inpcb *inp;
 579
 580         inp = so->so_pcb;
 581         if (inp == NULL)
 582                 panic("rip6_detach");
 583         /* xxx: RSVP */
 584         if (so == ip6_mrouter)
 585                 ip6_mrouter_done();
 586         if (inp->in6p_icmp6filt) {
 587                 FREE(inp->in6p_icmp6filt, M_PCB);
 588                 inp->in6p_icmp6filt = NULL;
 589         }
 590         in6_pcbdetach(inp);
 591         return 0;
 592 }
 593
 594 static int
 595 rip6_abort(struct socket *so)
 596 {
 597         soisdisconnected(so);
 598         return rip6_detach(so);
 599 }
 600
 601 static int
 602 rip6_disconnect(struct socket *so)
 603 {
 604         struct inpcb *inp = so->so_pcb;
 605
 606         if (!(so->so_state & SS_ISCONNECTED))
 607                 return ENOTCONN;
 608         inp->in6p_faddr = kin6addr_any;
 609         return rip6_abort(so);
 610 }
 611
 612 static int
 613 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 614 {
 615         struct inpcb *inp = so->so_pcb;
 616         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 617         struct ifaddr *ia = NULL;
 618
 619         if (nam->sa_len != sizeof(*addr))
 620                 return EINVAL;
 621
 622         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
 623                 return EADDRNOTAVAIL;
 624 #ifdef ENABLE_DEFAULT_SCOPE
 625         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 626                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 627         }
 628 #endif
 629         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 630             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL)
 631                 return EADDRNOTAVAIL;
 632         if (ia &&
 633             ((struct in6_ifaddr *)ia)->ia6_flags &
 634             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 635              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 636                 return (EADDRNOTAVAIL);
 637         }
 638         inp->in6p_laddr = addr->sin6_addr;
 639         return 0;
 640 }
 641
 642 static int
 643 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 644 {
 645         struct inpcb *inp = so->so_pcb;
 646         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 647         struct in6_addr *in6a = NULL;
 648         int error = 0;
 649 #ifdef ENABLE_DEFAULT_SCOPE
 650         struct sockaddr_in6 tmp;
 651 #endif
 652
 653         if (nam->sa_len != sizeof(*addr))
 654                 return EINVAL;
 655         if (TAILQ_EMPTY(&ifnet))
 656                 return EADDRNOTAVAIL;
 657         if (addr->sin6_family != AF_INET6)
 658                 return EAFNOSUPPORT;
 659 #ifdef ENABLE_DEFAULT_SCOPE
 660         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 661                 /* avoid overwrites */
 662                 tmp = *addr;
 663                 addr = &tmp;
 664                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 665         }
 666 #endif
 667         /* Source address selection. XXX: need pcblookup? */
 668         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 669                              inp->in6p_moptions, &inp->in6p_route,
 670                              &inp->in6p_laddr, &error, NULL);
 671         if (in6a == NULL)
 672                 return (error ? error : EADDRNOTAVAIL);
 673         inp->in6p_laddr = *in6a;
 674         inp->in6p_faddr = addr->sin6_addr;
 675         soisconnected(so);
 676         return 0;
 677 }
 678
 679 static int
 680 rip6_shutdown(struct socket *so)
 681 {
 682         socantsendmore(so);
 683         return 0;
 684 }
 685
 686 static int
 687 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 688           struct mbuf *control, struct thread *td)
 689 {
 690         struct inpcb *inp = so->so_pcb;
 691         struct sockaddr_in6 tmp;
 692         struct sockaddr_in6 *dst;
 693
 694         /* always copy sockaddr to avoid overwrites */
 695         if (so->so_state & SS_ISCONNECTED) {
 696                 if (nam) {
 697                         m_freem(m);
 698                         return EISCONN;
 699                 }
 700                 /* XXX */
 701                 bzero(&tmp, sizeof(tmp));
 702                 tmp.sin6_family = AF_INET6;
 703                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 704                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 705                       sizeof(struct in6_addr));
 706                 dst = &tmp;
 707         } else {
 708                 if (nam == NULL) {
 709                         m_freem(m);
 710                         return ENOTCONN;
 711                 }
 712                 tmp = *(struct sockaddr_in6 *)nam;
 713                 dst = &tmp;
 714         }
 715 #ifdef ENABLE_DEFAULT_SCOPE
 716         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 717                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 718         }
 719 #endif
 720         return rip6_output(m, so, dst, control);
 721 }
 722
 723 struct pr_usrreqs rip6_usrreqs = {
 724         .pru_abort = rip6_abort,
 725         .pru_accept = pru_accept_notsupp,
 726         .pru_attach = rip6_attach,
 727         .pru_bind = rip6_bind,
 728         .pru_connect = rip6_connect,
 729         .pru_connect2 = pru_connect2_notsupp,
 730         .pru_control = in6_control,
 731         .pru_detach = rip6_detach,
 732         .pru_disconnect = rip6_disconnect,
 733         .pru_listen = pru_listen_notsupp,
 734         .pru_peeraddr = in6_setpeeraddr,
 735         .pru_rcvd = pru_rcvd_notsupp,
 736         .pru_rcvoob = pru_rcvoob_notsupp,
 737         .pru_send = rip6_send,
 738         .pru_sense = pru_sense_null,
 739         .pru_shutdown = rip6_shutdown,
 740         .pru_sockaddr = in6_setsockaddr,
 741         .pru_sosend = sosend,
 742         .pru_soreceive = soreceive,
 743         .pru_sopoll = sopoll
 744 };