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/mbuf.h>
  75 #include <sys/socket.h>
  76 #include <sys/jail.h>
  77 #include <sys/protosw.h>
  78 #include <sys/socketvar.h>
  79 #include <sys/errno.h>
  80 #include <sys/systm.h>
  81 #include <sys/thread2.h>
  82
  83 #include <net/if.h>
  84 #include <net/route.h>
  85 #include <net/if_types.h>
  86
  87 #include <netinet/in.h>
  88 #include <netinet/in_var.h>
  89 #include <netinet/in_systm.h>
  90 #include <netinet/ip6.h>
  91 #include <netinet6/ip6_var.h>
  92 #include <netinet6/ip6_mroute.h>
  93 #include <netinet/icmp6.h>
  94 #include <netinet/in_pcb.h>
  95 #include <netinet6/in6_pcb.h>
  96 #include <netinet6/nd6.h>
  97 #include <netinet6/ip6protosw.h>
  98 #ifdef ENABLE_DEFAULT_SCOPE
  99 #include <netinet6/scope6_var.h>
 100 #endif
 101 #include <netinet6/raw_ip6.h>
 102
 103 #ifdef IPSEC
 104 #include <netinet6/ipsec.h>
 105 #include <netinet6/ipsec6.h>
 106 #endif /*IPSEC*/
 107
 108 #ifdef FAST_IPSEC
 109 #include <netproto/ipsec/ipsec.h>
 110 #include <netproto/ipsec/ipsec6.h>
 111 #endif /* FAST_IPSEC */
 112
 113 #include <machine/stdarg.h>
 114
 115 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 116 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 117
 118 /*
 119  * Raw interface to IP6 protocol.
 120  */
 121
 122 extern struct   inpcbinfo ripcbinfo;
 123 extern u_long   rip_sendspace;
 124 extern u_long   rip_recvspace;
 125
 126 struct rip6stat rip6stat;
 127
 128 /*
 129  * Setup generic address and protocol structures
 130  * for raw_input routine, then pass them along with
 131  * mbuf chain.
 132  */
 133 int
 134 rip6_input(struct mbuf **mp, int *offp, int proto)
 135 {
 136         struct mbuf *m = *mp;
 137         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 138         struct inpcb *in6p;
 139         struct inpcb *last = 0;
 140         struct mbuf *opts = NULL;
 141         struct sockaddr_in6 rip6src;
 142
 143         rip6stat.rip6s_ipackets++;
 144
 145         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 146                 /* XXX send icmp6 host/port unreach? */
 147                 m_freem(m);
 148                 return IPPROTO_DONE;
 149         }
 150
 151         init_sin6(&rip6src, m); /* general init */
 152
 153         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 154                 if (in6p->in6p_flags & INP_PLACEMARKER)
 155                         continue;
 156                 if (!(in6p->in6p_vflag & INP_IPV6))
 157                         continue;
 158                 if (in6p->in6p_ip6_nxt &&
 159                     in6p->in6p_ip6_nxt != proto)
 160                         continue;
 161                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 162                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 163                         continue;
 164                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 165                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 166                         continue;
 167                 if (in6p->in6p_cksum != -1) {
 168                         rip6stat.rip6s_isum++;
 169                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 170                             m->m_pkthdr.len - *offp)) {
 171                                 rip6stat.rip6s_badsum++;
 172                                 continue;
 173                         }
 174                 }
 175                 if (last) {
 176                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 177
 178 #ifdef IPSEC
 179                         /*
 180                          * Check AH/ESP integrity.
 181                          */
 182                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 183                                 m_freem(n);
 184                                 ipsec6stat.in_polvio++;
 185                                 /* do not inject data into pcb */
 186                         } else
 187 #endif /*IPSEC*/
 188 #ifdef FAST_IPSEC
 189                         /*
 190                          * Check AH/ESP integrity.
 191                          */
 192                         if (n && ipsec6_in_reject(n, last)) {
 193                                 m_freem(n);
 194                                 /* do not inject data into pcb */
 195                         } else
 196 #endif /*FAST_IPSEC*/
 197                         if (n) {
 198                                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 199                                     last->in6p_socket->so_options & SO_TIMESTAMP)
 200                                         ip6_savecontrol(last, &opts, ip6, n);
 201                                 /* strip intermediate headers */
 202                                 m_adj(n, *offp);
 203                                 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
 204                                                 (struct sockaddr *)&rip6src,
 205                                                  n, opts) == 0) {
 206                                         m_freem(n);
 207                                         if (opts)
 208                                                 m_freem(opts);
 209                                         rip6stat.rip6s_fullsock++;
 210                                 } else
 211                                         sorwakeup(last->in6p_socket);
 212                                 opts = NULL;
 213                         }
 214                 }
 215                 last = in6p;
 216         }
 217 #ifdef IPSEC
 218         /*
 219          * Check AH/ESP integrity.
 220          */
 221         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 222                 m_freem(m);
 223                 ipsec6stat.in_polvio++;
 224                 ip6stat.ip6s_delivered--;
 225                 /* do not inject data into pcb */
 226         } else
 227 #endif /*IPSEC*/
 228 #ifdef FAST_IPSEC
 229         /*
 230          * Check AH/ESP integrity.
 231          */
 232         if (last && ipsec6_in_reject(m, last)) {
 233                 m_freem(m);
 234                 ip6stat.ip6s_delivered--;
 235                 /* do not inject data into pcb */
 236         } else
 237 #endif /*FAST_IPSEC*/
 238         if (last) {
 239                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 240                     last->in6p_socket->so_options & SO_TIMESTAMP)
 241                         ip6_savecontrol(last, &opts, ip6, m);
 242                 /* strip intermediate headers */
 243                 m_adj(m, *offp);
 244                 if (ssb_appendaddr(&last->in6p_socket->so_rcv,
 245                                 (struct sockaddr *)&rip6src, m, opts) == 0) {
 246                         m_freem(m);
 247                         if (opts)
 248                                 m_freem(opts);
 249                         rip6stat.rip6s_fullsock++;
 250                 } else
 251                         sorwakeup(last->in6p_socket);
 252         } else {
 253                 rip6stat.rip6s_nosock++;
 254                 if (m->m_flags & M_MCAST)
 255                         rip6stat.rip6s_nosockmcast++;
 256                 if (proto == IPPROTO_NONE)
 257                         m_freem(m);
 258                 else {
 259                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 260                         icmp6_error(m, ICMP6_PARAM_PROB,
 261                                     ICMP6_PARAMPROB_NEXTHEADER,
 262                                     prvnxtp - mtod(m, char *));
 263                 }
 264                 ip6stat.ip6s_delivered--;
 265         }
 266         return IPPROTO_DONE;
 267 }
 268
 269 void
 270 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
 271 {
 272         struct ip6_hdr *ip6;
 273         struct mbuf *m;
 274         int off = 0;
 275         struct ip6ctlparam *ip6cp = NULL;
 276         const struct sockaddr_in6 *sa6_src = NULL;
 277         void (*notify) (struct inpcb *, int) = in6_rtchange;
 278
 279         if (sa->sa_family != AF_INET6 ||
 280             sa->sa_len != sizeof(struct sockaddr_in6))
 281                 return;
 282
 283         if ((unsigned)cmd >= PRC_NCMDS)
 284                 return;
 285         if (PRC_IS_REDIRECT(cmd))
 286                 notify = in6_rtchange, d = NULL;
 287         else if (cmd == PRC_HOSTDEAD)
 288                 d = NULL;
 289         else if (inet6ctlerrmap[cmd] == 0)
 290                 return;
 291
 292         /* if the parameter is from icmp6, decode it. */
 293         if (d != NULL) {
 294                 ip6cp = (struct ip6ctlparam *)d;
 295                 m = ip6cp->ip6c_m;
 296                 ip6 = ip6cp->ip6c_ip6;
 297                 off = ip6cp->ip6c_off;
 298                 sa6_src = ip6cp->ip6c_src;
 299         } else {
 300                 m = NULL;
 301                 ip6 = NULL;
 302                 sa6_src = &sa6_any;
 303         }
 304
 305         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
 306                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 307 }
 308
 309 /*
 310  * Generate IPv6 header and pass packet to ip6_output.
 311  * Tack on options user may have setup with control call.
 312  */
 313 int
 314 rip6_output(struct mbuf *m, struct socket *so, ...)
 315 {
 316         struct sockaddr_in6 *dstsock;
 317         struct mbuf *control;
 318         struct in6_addr *dst;
 319         struct ip6_hdr *ip6;
 320         struct inpcb *in6p;
 321         u_int   plen = m->m_pkthdr.len;
 322         int error = 0;
 323         struct ip6_pktopts opt, *optp = 0;
 324         struct ifnet *oifp = NULL;
 325         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 326         int priv = 0;
 327         __va_list ap;
 328
 329         __va_start(ap, so);
 330         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 331         control = __va_arg(ap, struct mbuf *);
 332         __va_end(ap);
 333
 334         in6p = so->so_pcb;
 335
 336         priv = 0;
 337         if (so->so_cred->cr_uid == 0)
 338                 priv = 1;
 339         dst = &dstsock->sin6_addr;
 340         if (control) {
 341                 if ((error = ip6_setpktoptions(control, &opt,
 342                     in6p->in6p_outputopts,
 343                     so->so_proto->pr_protocol, priv)) != 0)
 344                         goto bad;
 345                 optp = &opt;
 346         } else
 347                 optp = in6p->in6p_outputopts;
 348
 349         /*
 350          * For an ICMPv6 packet, we should know its type and code
 351          * to update statistics.
 352          */
 353         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 354                 struct icmp6_hdr *icmp6;
 355                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 356                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 357                         error = ENOBUFS;
 358                         goto bad;
 359                 }
 360                 icmp6 = mtod(m, struct icmp6_hdr *);
 361                 type = icmp6->icmp6_type;
 362                 code = icmp6->icmp6_code;
 363         }
 364
 365         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 366         ip6 = mtod(m, struct ip6_hdr *);
 367
 368         /*
 369          * Next header might not be ICMP6 but use its pseudo header anyway.
 370          */
 371         ip6->ip6_dst = *dst;
 372
 373         /*
 374          * If the scope of the destination is link-local, embed the interface
 375          * index in the address.
 376          *
 377          * XXX advanced-api value overrides sin6_scope_id
 378          */
 379         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 380                 struct in6_pktinfo *pi;
 381
 382                 /*
 383                  * XXX Boundary check is assumed to be already done in
 384                  * ip6_setpktoptions().
 385                  */
 386                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 387                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 388                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 389                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 390                          in6p->in6p_moptions &&
 391                          in6p->in6p_moptions->im6o_multicast_ifp) {
 392                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 393                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 394                 } else if (dstsock->sin6_scope_id) {
 395                         /* boundary check */
 396                         if (dstsock->sin6_scope_id < 0
 397                          || if_index < dstsock->sin6_scope_id) {
 398                                 error = ENXIO;  /* XXX EINVAL? */
 399                                 goto bad;
 400                         }
 401                         ip6->ip6_dst.s6_addr16[1]
 402                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 403                 }
 404         }
 405
 406         /*
 407          * Source address selection.
 408          */
 409         {
 410                 struct in6_addr *in6a;
 411
 412                 if ((in6a = in6_selectsrc(dstsock, optp,
 413                                           in6p->in6p_moptions,
 414                                           &in6p->in6p_route,
 415                                           &in6p->in6p_laddr,
 416                                           &error, NULL)) == NULL) {
 417                         if (error == 0)
 418                                 error = EADDRNOTAVAIL;
 419                         goto bad;
 420                 }
 421                 ip6->ip6_src = *in6a;
 422                 if (in6p->in6p_route.ro_rt)
 423                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 424         }
 425         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 426                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 427         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 428                 (IPV6_VERSION & IPV6_VERSION_MASK);
 429         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 430         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 431         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 432
 433         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 434             in6p->in6p_cksum != -1) {
 435                 struct mbuf *n;
 436                 int off;
 437                 u_int16_t *p;
 438
 439                 /* compute checksum */
 440                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 441                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 442                 else
 443                         off = in6p->in6p_cksum;
 444                 if (plen < off + 1) {
 445                         error = EINVAL;
 446                         goto bad;
 447                 }
 448                 off += sizeof(struct ip6_hdr);
 449
 450                 n = m;
 451                 while (n && n->m_len <= off) {
 452                         off -= n->m_len;
 453                         n = n->m_next;
 454                 }
 455                 if (!n)
 456                         goto bad;
 457                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 458                 *p = 0;
 459                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 460         }
 461
 462         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 463                            in6p->in6p_moptions, &oifp, in6p);
 464         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 465                 if (oifp)
 466                         icmp6_ifoutstat_inc(oifp, type, code);
 467                 icmp6stat.icp6s_outhist[type]++;
 468         } else
 469                 rip6stat.rip6s_opackets++;
 470
 471         goto freectl;
 472
 473 bad:
 474         if (m)
 475                 m_freem(m);
 476
 477 freectl:
 478         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 479                 RTFREE(optp->ip6po_route.ro_rt);
 480         if (control) {
 481                 if (optp == &opt)
 482                         ip6_clearpktopts(optp, -1);
 483                 m_freem(control);
 484         }
 485         return (error);
 486 }
 487
 488 /*
 489  * Raw IPv6 socket option processing.
 490  */
 491 int
 492 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
 493 {
 494         int error;
 495
 496         if (sopt->sopt_level == IPPROTO_ICMPV6)
 497                 /*
 498                  * XXX: is it better to call icmp6_ctloutput() directly
 499                  * from protosw?
 500                  */
 501                 return (icmp6_ctloutput(so, sopt));
 502         else if (sopt->sopt_level != IPPROTO_IPV6)
 503                 return (EINVAL);
 504
 505         error = 0;
 506
 507         switch (sopt->sopt_dir) {
 508         case SOPT_GET:
 509                 switch (sopt->sopt_name) {
 510                 case MRT6_INIT:
 511                 case MRT6_DONE:
 512                 case MRT6_ADD_MIF:
 513                 case MRT6_DEL_MIF:
 514                 case MRT6_ADD_MFC:
 515                 case MRT6_DEL_MFC:
 516                 case MRT6_PIM:
 517                         error = ip6_mrouter_get(so, sopt);
 518                         break;
 519                 case IPV6_CHECKSUM:
 520                         error = ip6_raw_ctloutput(so, sopt);
 521                         break;
 522                 default:
 523                         error = ip6_ctloutput(so, sopt);
 524                         break;
 525                 }
 526                 break;
 527
 528         case SOPT_SET:
 529                 switch (sopt->sopt_name) {
 530                 case MRT6_INIT:
 531                 case MRT6_DONE:
 532                 case MRT6_ADD_MIF:
 533                 case MRT6_DEL_MIF:
 534                 case MRT6_ADD_MFC:
 535                 case MRT6_DEL_MFC:
 536                 case MRT6_PIM:
 537                         error = ip6_mrouter_set(so, sopt);
 538                         break;
 539                 case IPV6_CHECKSUM:
 540                         error = ip6_raw_ctloutput(so, sopt);
 541                         break;
 542                 default:
 543                         error = ip6_ctloutput(so, sopt);
 544                         break;
 545                 }
 546                 break;
 547         }
 548
 549         return (error);
 550 }
 551
 552 static int
 553 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 554 {
 555         struct inpcb *inp;
 556         int error;
 557         int flag;
 558
 559         if (jailed(ai->p_ucred) && jail_allow_raw_sockets)
 560                 flag = NULL_CRED_OKAY | PRISON_ROOT;
 561         else
 562                 flag = NULL_CRED_OKAY;
 563
 564         inp = so->so_pcb;
 565         if (inp)
 566                 panic("rip6_attach");
 567         if ((error = suser_cred(ai->p_ucred, flag)) != 0)
 568                 return error;
 569
 570         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 571         if (error)
 572                 return error;
 573         crit_enter();
 574         error = in_pcballoc(so, &ripcbinfo);
 575         crit_exit();
 576         if (error)
 577                 return error;
 578         inp = (struct inpcb *)so->so_pcb;
 579         inp->inp_vflag |= INP_IPV6;
 580         inp->in6p_ip6_nxt = (long)proto;
 581         inp->in6p_hops = -1;    /* use kernel default */
 582         inp->in6p_cksum = -1;
 583         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 584                sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
 585         if (inp->in6p_icmp6filt != NULL)
 586                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 587         return 0;
 588 }
 589
 590 static int
 591 rip6_detach(struct socket *so)
 592 {
 593         struct inpcb *inp;
 594
 595         inp = so->so_pcb;
 596         if (inp == NULL)
 597                 panic("rip6_detach");
 598         /* xxx: RSVP */
 599         if (so == ip6_mrouter)
 600                 ip6_mrouter_done();
 601         if (inp->in6p_icmp6filt) {
 602                 FREE(inp->in6p_icmp6filt, M_PCB);
 603                 inp->in6p_icmp6filt = NULL;
 604         }
 605         in6_pcbdetach(inp);
 606         return 0;
 607 }
 608
 609 static int
 610 rip6_abort(struct socket *so)
 611 {
 612         soisdisconnected(so);
 613         return rip6_detach(so);
 614 }
 615
 616 static int
 617 rip6_disconnect(struct socket *so)
 618 {
 619         struct inpcb *inp = so->so_pcb;
 620
 621         if (!(so->so_state & SS_ISCONNECTED))
 622                 return ENOTCONN;
 623         inp->in6p_faddr = kin6addr_any;
 624         return rip6_abort(so);
 625 }
 626
 627 static int
 628 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 629 {
 630         struct inpcb *inp = so->so_pcb;
 631         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 632         struct ifaddr *ia = NULL;
 633
 634         if (nam->sa_len != sizeof(*addr))
 635                 return EINVAL;
 636
 637         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6)
 638                 return EADDRNOTAVAIL;
 639 #ifdef ENABLE_DEFAULT_SCOPE
 640         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 641                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 642         }
 643 #endif
 644         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 645             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL)
 646                 return EADDRNOTAVAIL;
 647         if (ia &&
 648             ((struct in6_ifaddr *)ia)->ia6_flags &
 649             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 650              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 651                 return (EADDRNOTAVAIL);
 652         }
 653         inp->in6p_laddr = addr->sin6_addr;
 654         return 0;
 655 }
 656
 657 static int
 658 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 659 {
 660         struct inpcb *inp = so->so_pcb;
 661         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 662         struct in6_addr *in6a = NULL;
 663         int error = 0;
 664 #ifdef ENABLE_DEFAULT_SCOPE
 665         struct sockaddr_in6 tmp;
 666 #endif
 667
 668         if (nam->sa_len != sizeof(*addr))
 669                 return EINVAL;
 670         if (TAILQ_EMPTY(&ifnet))
 671                 return EADDRNOTAVAIL;
 672         if (addr->sin6_family != AF_INET6)
 673                 return EAFNOSUPPORT;
 674 #ifdef ENABLE_DEFAULT_SCOPE
 675         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 676                 /* avoid overwrites */
 677                 tmp = *addr;
 678                 addr = &tmp;
 679                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 680         }
 681 #endif
 682         /* Source address selection. XXX: need pcblookup? */
 683         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 684                              inp->in6p_moptions, &inp->in6p_route,
 685                              &inp->in6p_laddr, &error, NULL);
 686         if (in6a == NULL)
 687                 return (error ? error : EADDRNOTAVAIL);
 688         inp->in6p_laddr = *in6a;
 689         inp->in6p_faddr = addr->sin6_addr;
 690         soisconnected(so);
 691         return 0;
 692 }
 693
 694 static int
 695 rip6_shutdown(struct socket *so)
 696 {
 697         socantsendmore(so);
 698         return 0;
 699 }
 700
 701 static int
 702 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 703           struct mbuf *control, struct thread *td)
 704 {
 705         struct inpcb *inp = so->so_pcb;
 706         struct sockaddr_in6 tmp;
 707         struct sockaddr_in6 *dst;
 708
 709         /* always copy sockaddr to avoid overwrites */
 710         if (so->so_state & SS_ISCONNECTED) {
 711                 if (nam) {
 712                         m_freem(m);
 713                         return EISCONN;
 714                 }
 715                 /* XXX */
 716                 bzero(&tmp, sizeof(tmp));
 717                 tmp.sin6_family = AF_INET6;
 718                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 719                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 720                       sizeof(struct in6_addr));
 721                 dst = &tmp;
 722         } else {
 723                 if (nam == NULL) {
 724                         m_freem(m);
 725                         return ENOTCONN;
 726                 }
 727                 tmp = *(struct sockaddr_in6 *)nam;
 728                 dst = &tmp;
 729         }
 730 #ifdef ENABLE_DEFAULT_SCOPE
 731         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 732                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 733         }
 734 #endif
 735         return rip6_output(m, so, dst, control);
 736 }
 737
 738 struct pr_usrreqs rip6_usrreqs = {
 739         .pru_abort = rip6_abort,
 740         .pru_accept = pru_accept_notsupp,
 741         .pru_attach = rip6_attach,
 742         .pru_bind = rip6_bind,
 743         .pru_connect = rip6_connect,
 744         .pru_connect2 = pru_connect2_notsupp,
 745         .pru_control = in6_control,
 746         .pru_detach = rip6_detach,
 747         .pru_disconnect = rip6_disconnect,
 748         .pru_listen = pru_listen_notsupp,
 749         .pru_peeraddr = in6_setpeeraddr,
 750         .pru_rcvd = pru_rcvd_notsupp,
 751         .pru_rcvoob = pru_rcvoob_notsupp,
 752         .pru_send = rip6_send,
 753         .pru_sense = pru_sense_null,
 754         .pru_shutdown = rip6_shutdown,
 755         .pru_sockaddr = in6_setsockaddr,
 756         .pru_sosend = sosend,
 757         .pru_soreceive = soreceive,
 758         .pru_sopoll = sopoll
 759 };