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
  83 #include <sys/thread2.h>
  84 #include <sys/socketvar2.h>
  85 #include <sys/msgport2.h>
  86
  87 #include <net/if.h>
  88 #include <net/route.h>
  89 #include <net/if_types.h>
  90
  91 #include <netinet/in.h>
  92 #include <netinet/in_var.h>
  93 #include <netinet/in_systm.h>
  94 #include <netinet/ip6.h>
  95 #include <netinet6/ip6_var.h>
  96 #include <netinet6/ip6_mroute.h>
  97 #include <netinet/icmp6.h>
  98 #include <netinet/in_pcb.h>
  99 #include <netinet6/in6_pcb.h>
 100 #include <netinet6/nd6.h>
 101 #include <netinet6/ip6protosw.h>
 102 #ifdef ENABLE_DEFAULT_SCOPE
 103 #include <netinet6/scope6_var.h>
 104 #endif
 105 #include <netinet6/raw_ip6.h>
 106
 107 #ifdef IPSEC
 108 #include <netinet6/ipsec.h>
 109 #include <netinet6/ipsec6.h>
 110 #endif /*IPSEC*/
 111
 112 #ifdef FAST_IPSEC
 113 #include <netproto/ipsec/ipsec.h>
 114 #include <netproto/ipsec/ipsec6.h>
 115 #endif /* FAST_IPSEC */
 116
 117 #include <machine/stdarg.h>
 118
 119 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 120 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 121
 122 /*
 123  * Raw interface to IP6 protocol.
 124  */
 125
 126 extern struct   inpcbinfo ripcbinfo;
 127 extern u_long   rip_sendspace;
 128 extern u_long   rip_recvspace;
 129
 130 struct rip6stat rip6stat;
 131
 132 /*
 133  * Setup generic address and protocol structures
 134  * for raw_input routine, then pass them along with
 135  * mbuf chain.
 136  */
 137 int
 138 rip6_input(struct mbuf **mp, int *offp, int proto)
 139 {
 140         struct mbuf *m = *mp;
 141         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 142         struct inpcb *in6p;
 143         struct inpcb *last = 0;
 144         struct mbuf *opts = NULL;
 145         struct sockaddr_in6 rip6src;
 146
 147         rip6stat.rip6s_ipackets++;
 148
 149         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 150                 /* XXX send icmp6 host/port unreach? */
 151                 m_freem(m);
 152                 return IPPROTO_DONE;
 153         }
 154
 155         init_sin6(&rip6src, m); /* general init */
 156
 157         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 158                 if (in6p->in6p_flags & INP_PLACEMARKER)
 159                         continue;
 160                 if (!(in6p->in6p_vflag & INP_IPV6))
 161                         continue;
 162                 if (in6p->in6p_ip6_nxt &&
 163                     in6p->in6p_ip6_nxt != proto)
 164                         continue;
 165                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 166                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 167                         continue;
 168                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 169                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 170                         continue;
 171                 if (in6p->in6p_cksum != -1) {
 172                         rip6stat.rip6s_isum++;
 173                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 174                             m->m_pkthdr.len - *offp)) {
 175                                 rip6stat.rip6s_badsum++;
 176                                 continue;
 177                         }
 178                 }
 179                 if (last) {
 180                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 181
 182 #ifdef IPSEC
 183                         /*
 184                          * Check AH/ESP integrity.
 185                          */
 186                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 187                                 m_freem(n);
 188                                 ipsec6stat.in_polvio++;
 189                                 /* do not inject data into pcb */
 190                         } else
 191 #endif /*IPSEC*/
 192 #ifdef FAST_IPSEC
 193                         /*
 194                          * Check AH/ESP integrity.
 195                          */
 196                         if (n && ipsec6_in_reject(n, last)) {
 197                                 m_freem(n);
 198                                 /* do not inject data into pcb */
 199                         } else
 200 #endif /*FAST_IPSEC*/
 201                         if (n) {
 202                                 struct socket *so;
 203
 204                                 so = last->in6p_socket;
 205                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 206                                     (so->so_options & SO_TIMESTAMP)) {
 207                                         ip6_savecontrol(last, &opts, ip6, n);
 208                                 }
 209                                 /* strip intermediate headers */
 210                                 m_adj(n, *offp);
 211                                 lwkt_gettoken(&so->so_rcv.ssb_token);
 212                                 if (ssb_appendaddr(&so->so_rcv,
 213                                                 (struct sockaddr *)&rip6src,
 214                                                  n, opts) == 0) {
 215                                         m_freem(n);
 216                                         if (opts)
 217                                                 m_freem(opts);
 218                                         rip6stat.rip6s_fullsock++;
 219                                 } else {
 220                                         sorwakeup(so);
 221                                 }
 222                                 lwkt_reltoken(&so->so_rcv.ssb_token);
 223                                 opts = NULL;
 224                         }
 225                 }
 226                 last = in6p;
 227         }
 228 #ifdef IPSEC
 229         /*
 230          * Check AH/ESP integrity.
 231          */
 232         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 233                 m_freem(m);
 234                 ipsec6stat.in_polvio++;
 235                 ip6stat.ip6s_delivered--;
 236                 /* do not inject data into pcb */
 237         } else
 238 #endif /*IPSEC*/
 239 #ifdef FAST_IPSEC
 240         /*
 241          * Check AH/ESP integrity.
 242          */
 243         if (last && ipsec6_in_reject(m, last)) {
 244                 m_freem(m);
 245                 ip6stat.ip6s_delivered--;
 246                 /* do not inject data into pcb */
 247         } else
 248 #endif /*FAST_IPSEC*/
 249         if (last) {
 250                 struct socket *so;
 251
 252                 so = last->in6p_socket;
 253                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 254                     (so->so_options & SO_TIMESTAMP)) {
 255                         ip6_savecontrol(last, &opts, ip6, m);
 256                 }
 257                 /* strip intermediate headers */
 258                 m_adj(m, *offp);
 259                 lwkt_gettoken(&so->so_rcv.ssb_token);
 260                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
 261                                    m, opts) == 0) {
 262                         m_freem(m);
 263                         if (opts)
 264                                 m_freem(opts);
 265                         rip6stat.rip6s_fullsock++;
 266                 } else {
 267                         sorwakeup(so);
 268                 }
 269                 lwkt_reltoken(&so->so_rcv.ssb_token);
 270         } else {
 271                 rip6stat.rip6s_nosock++;
 272                 if (m->m_flags & M_MCAST)
 273                         rip6stat.rip6s_nosockmcast++;
 274                 if (proto == IPPROTO_NONE)
 275                         m_freem(m);
 276                 else {
 277                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 278                         icmp6_error(m, ICMP6_PARAM_PROB,
 279                                     ICMP6_PARAMPROB_NEXTHEADER,
 280                                     prvnxtp - mtod(m, char *));
 281                 }
 282                 ip6stat.ip6s_delivered--;
 283         }
 284         return IPPROTO_DONE;
 285 }
 286
 287 void
 288 rip6_ctlinput(netmsg_t msg)
 289 {
 290         int cmd = msg->ctlinput.nm_cmd;
 291         struct sockaddr *sa = msg->ctlinput.nm_arg;
 292         void *d = msg->ctlinput.nm_extra;
 293         struct ip6_hdr *ip6;
 294         struct mbuf *m;
 295         int off = 0;
 296         struct ip6ctlparam *ip6cp = NULL;
 297         const struct sockaddr_in6 *sa6_src = NULL;
 298         void (*notify) (struct inpcb *, int) = in6_rtchange;
 299
 300         if (sa->sa_family != AF_INET6 ||
 301             sa->sa_len != sizeof(struct sockaddr_in6))
 302                 goto out;
 303
 304         if ((unsigned)cmd >= PRC_NCMDS)
 305                 goto out;
 306         if (PRC_IS_REDIRECT(cmd))
 307                 notify = in6_rtchange, d = NULL;
 308         else if (cmd == PRC_HOSTDEAD)
 309                 d = NULL;
 310         else if (inet6ctlerrmap[cmd] == 0)
 311                 goto out;
 312
 313         /* if the parameter is from icmp6, decode it. */
 314         if (d != NULL) {
 315                 ip6cp = (struct ip6ctlparam *)d;
 316                 m = ip6cp->ip6c_m;
 317                 ip6 = ip6cp->ip6c_ip6;
 318                 off = ip6cp->ip6c_off;
 319                 sa6_src = ip6cp->ip6c_src;
 320         } else {
 321                 m = NULL;
 322                 ip6 = NULL;
 323                 sa6_src = &sa6_any;
 324         }
 325
 326         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
 327                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 328 out:
 329         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 330 }
 331
 332 /*
 333  * Generate IPv6 header and pass packet to ip6_output.
 334  * Tack on options user may have setup with control call.
 335  */
 336 int
 337 rip6_output(struct mbuf *m, struct socket *so, ...)
 338 {
 339         struct sockaddr_in6 *dstsock;
 340         struct mbuf *control;
 341         struct in6_addr *dst;
 342         struct ip6_hdr *ip6;
 343         struct inpcb *in6p;
 344         u_int   plen = m->m_pkthdr.len;
 345         int error = 0;
 346         struct ip6_pktopts opt, *optp = 0;
 347         struct ifnet *oifp = NULL;
 348         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 349         int priv = 0;
 350         __va_list ap;
 351
 352         __va_start(ap, so);
 353         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 354         control = __va_arg(ap, struct mbuf *);
 355         __va_end(ap);
 356
 357         in6p = so->so_pcb;
 358
 359         priv = 0;
 360         if (so->so_cred->cr_uid == 0)
 361                 priv = 1;
 362         dst = &dstsock->sin6_addr;
 363         if (control) {
 364                 if ((error = ip6_setpktoptions(control, &opt,
 365                     in6p->in6p_outputopts,
 366                     so->so_proto->pr_protocol, priv)) != 0)
 367                         goto bad;
 368                 optp = &opt;
 369         } else
 370                 optp = in6p->in6p_outputopts;
 371
 372         /*
 373          * For an ICMPv6 packet, we should know its type and code
 374          * to update statistics.
 375          */
 376         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 377                 struct icmp6_hdr *icmp6;
 378                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 379                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 380                         error = ENOBUFS;
 381                         goto bad;
 382                 }
 383                 icmp6 = mtod(m, struct icmp6_hdr *);
 384                 type = icmp6->icmp6_type;
 385                 code = icmp6->icmp6_code;
 386         }
 387
 388         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 389         ip6 = mtod(m, struct ip6_hdr *);
 390
 391         /*
 392          * Next header might not be ICMP6 but use its pseudo header anyway.
 393          */
 394         ip6->ip6_dst = *dst;
 395
 396         /*
 397          * If the scope of the destination is link-local, embed the interface
 398          * index in the address.
 399          *
 400          * XXX advanced-api value overrides sin6_scope_id
 401          */
 402         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 403                 struct in6_pktinfo *pi;
 404
 405                 /*
 406                  * XXX Boundary check is assumed to be already done in
 407                  * ip6_setpktoptions().
 408                  */
 409                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 410                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 411                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 412                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 413                          in6p->in6p_moptions &&
 414                          in6p->in6p_moptions->im6o_multicast_ifp) {
 415                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 416                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 417                 } else if (dstsock->sin6_scope_id) {
 418                         /* boundary check */
 419                         if (dstsock->sin6_scope_id < 0
 420                          || if_index < dstsock->sin6_scope_id) {
 421                                 error = ENXIO;  /* XXX EINVAL? */
 422                                 goto bad;
 423                         }
 424                         ip6->ip6_dst.s6_addr16[1]
 425                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 426                 }
 427         }
 428
 429         /*
 430          * Source address selection.
 431          */
 432         {
 433                 struct in6_addr *in6a;
 434
 435                 if ((in6a = in6_selectsrc(dstsock, optp,
 436                                           in6p->in6p_moptions,
 437                                           &in6p->in6p_route,
 438                                           &in6p->in6p_laddr,
 439                                           &error, NULL)) == NULL) {
 440                         if (error == 0)
 441                                 error = EADDRNOTAVAIL;
 442                         goto bad;
 443                 }
 444                 ip6->ip6_src = *in6a;
 445                 if (in6p->in6p_route.ro_rt)
 446                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 447         }
 448         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 449                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 450         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 451                 (IPV6_VERSION & IPV6_VERSION_MASK);
 452         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 453         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 454         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 455
 456         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 457             in6p->in6p_cksum != -1) {
 458                 struct mbuf *n;
 459                 int off;
 460                 u_int16_t *p;
 461
 462                 /* compute checksum */
 463                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 464                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 465                 else
 466                         off = in6p->in6p_cksum;
 467                 if (plen < off + 1) {
 468                         error = EINVAL;
 469                         goto bad;
 470                 }
 471                 off += sizeof(struct ip6_hdr);
 472
 473                 n = m;
 474                 while (n && n->m_len <= off) {
 475                         off -= n->m_len;
 476                         n = n->m_next;
 477                 }
 478                 if (!n)
 479                         goto bad;
 480                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 481                 *p = 0;
 482                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 483         }
 484
 485         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 486                            in6p->in6p_moptions, &oifp, in6p);
 487         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 488                 if (oifp)
 489                         icmp6_ifoutstat_inc(oifp, type, code);
 490                 icmp6stat.icp6s_outhist[type]++;
 491         } else
 492                 rip6stat.rip6s_opackets++;
 493
 494         goto freectl;
 495
 496 bad:
 497         if (m)
 498                 m_freem(m);
 499
 500 freectl:
 501         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 502                 RTFREE(optp->ip6po_route.ro_rt);
 503         if (control) {
 504                 if (optp == &opt)
 505                         ip6_clearpktopts(optp, -1);
 506                 m_freem(control);
 507         }
 508         return (error);
 509 }
 510
 511 /*
 512  * Raw IPv6 socket option processing.
 513  */
 514 void
 515 rip6_ctloutput(netmsg_t msg)
 516 {
 517         struct socket *so = msg->ctloutput.base.nm_so;;
 518         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 519         int error;
 520
 521         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 522                 /*
 523                  * XXX: is it better to call icmp6_ctloutput() directly
 524                  * from protosw?
 525                  */
 526                 icmp6_ctloutput(msg);
 527                 /* msg invalid now */
 528                 return;
 529         }
 530         if (sopt->sopt_level != IPPROTO_IPV6) {
 531                 error = EINVAL;
 532                 goto out;
 533         }
 534
 535         error = 0;
 536
 537         switch (sopt->sopt_dir) {
 538         case SOPT_GET:
 539                 switch (sopt->sopt_name) {
 540                 case MRT6_INIT:
 541                 case MRT6_DONE:
 542                 case MRT6_ADD_MIF:
 543                 case MRT6_DEL_MIF:
 544                 case MRT6_ADD_MFC:
 545                 case MRT6_DEL_MFC:
 546                 case MRT6_PIM:
 547                         error = ip6_mrouter_get(so, sopt);
 548                         break;
 549                 case IPV6_CHECKSUM:
 550                         error = ip6_raw_ctloutput(so, sopt);
 551                         break;
 552                 default:
 553                         error = ip6_ctloutput(so, sopt);
 554                         break;
 555                 }
 556                 break;
 557
 558         case SOPT_SET:
 559                 switch (sopt->sopt_name) {
 560                 case MRT6_INIT:
 561                 case MRT6_DONE:
 562                 case MRT6_ADD_MIF:
 563                 case MRT6_DEL_MIF:
 564                 case MRT6_ADD_MFC:
 565                 case MRT6_DEL_MFC:
 566                 case MRT6_PIM:
 567                         error = ip6_mrouter_set(so, sopt);
 568                         break;
 569                 case IPV6_CHECKSUM:
 570                         error = ip6_raw_ctloutput(so, sopt);
 571                         break;
 572                 default:
 573                         error = ip6_ctloutput(so, sopt);
 574                         break;
 575                 }
 576                 break;
 577         }
 578 out:
 579         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 580 }
 581
 582 static void
 583 rip6_attach(netmsg_t msg)
 584 {
 585         struct socket *so = msg->attach.base.nm_so;
 586         int proto = msg->attach.nm_proto;
 587         struct pru_attach_info *ai = msg->attach.nm_ai;
 588         struct inpcb *inp;
 589         int error;
 590
 591         inp = so->so_pcb;
 592         if (inp)
 593                 panic("rip6_attach");
 594         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 595         if (error)
 596                 goto out;
 597
 598         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 599         if (error)
 600                 goto out;
 601         crit_enter();
 602         error = in_pcballoc(so, &ripcbinfo);
 603         crit_exit();
 604         if (error)
 605                 goto out;
 606         inp = (struct inpcb *)so->so_pcb;
 607         inp->inp_vflag |= INP_IPV6;
 608         inp->in6p_ip6_nxt = (long)proto;
 609         inp->in6p_hops = -1;    /* use kernel default */
 610         inp->in6p_cksum = -1;
 611         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 612                sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
 613         if (inp->in6p_icmp6filt != NULL)
 614                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 615         error = 0;
 616 out:
 617         lwkt_replymsg(&msg->attach.base.lmsg, error);
 618 }
 619
 620 static void
 621 rip6_detach(netmsg_t msg)
 622 {
 623         struct socket *so = msg->detach.base.nm_so;
 624         struct inpcb *inp;
 625
 626         inp = so->so_pcb;
 627         if (inp == NULL)
 628                 panic("rip6_detach");
 629         /* xxx: RSVP */
 630         if (so == ip6_mrouter)
 631                 ip6_mrouter_done();
 632         if (inp->in6p_icmp6filt) {
 633                 FREE(inp->in6p_icmp6filt, M_PCB);
 634                 inp->in6p_icmp6filt = NULL;
 635         }
 636         in6_pcbdetach(inp);
 637         lwkt_replymsg(&msg->detach.base.lmsg, 0);
 638 }
 639
 640 /*
 641  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 642  *       will sofree() it when we return.
 643  */
 644 static void
 645 rip6_abort(netmsg_t msg)
 646 {
 647         soisdisconnected(msg->abort.base.nm_so);
 648         rip6_detach(msg);
 649         /* msg invalid now */
 650 }
 651
 652 static void
 653 rip6_disconnect(netmsg_t msg)
 654 {
 655         struct socket *so = msg->disconnect.base.nm_so;
 656         struct inpcb *inp = so->so_pcb;
 657
 658         if (so->so_state & SS_ISCONNECTED) {
 659                 inp->in6p_faddr = kin6addr_any;
 660                 soreference(so);
 661                 rip6_abort(msg);
 662                 /* msg invalid now */
 663                 sofree(so);
 664                 return;
 665         }
 666         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
 667 }
 668
 669 static void
 670 rip6_bind(netmsg_t msg)
 671 {
 672         struct socket *so = msg->bind.base.nm_so;
 673         struct sockaddr *nam = msg->bind.nm_nam;
 674         struct inpcb *inp = so->so_pcb;
 675         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 676         struct ifaddr *ia = NULL;
 677         int error;
 678
 679         if (nam->sa_len != sizeof(*addr)) {
 680                 error = EINVAL;
 681                 goto out;
 682         }
 683
 684         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
 685                 error = EADDRNOTAVAIL;
 686                 goto out;
 687         }
 688 #ifdef ENABLE_DEFAULT_SCOPE
 689         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 690                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 691         }
 692 #endif
 693         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 694             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
 695                 error = EADDRNOTAVAIL;
 696                 goto out;
 697         }
 698         if (ia &&
 699             ((struct in6_ifaddr *)ia)->ia6_flags &
 700             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 701              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 702                 error = EADDRNOTAVAIL;
 703                 goto out;
 704         }
 705         inp->in6p_laddr = addr->sin6_addr;
 706         error = 0;
 707 out:
 708         lwkt_replymsg(&msg->bind.base.lmsg, error);
 709 }
 710
 711 static void
 712 rip6_connect(netmsg_t msg)
 713 {
 714         struct socket *so = msg->connect.base.nm_so;
 715         struct sockaddr *nam = msg->connect.nm_nam;
 716         struct inpcb *inp = so->so_pcb;
 717         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 718         struct in6_addr *in6a = NULL;
 719         int error = 0;
 720 #ifdef ENABLE_DEFAULT_SCOPE
 721         struct sockaddr_in6 tmp;
 722 #endif
 723
 724         if (nam->sa_len != sizeof(*addr)) {
 725                 error = EINVAL;
 726                 goto out;
 727         }
 728         if (TAILQ_EMPTY(&ifnet)) {
 729                 error = EADDRNOTAVAIL;
 730                 goto out;
 731         }
 732         if (addr->sin6_family != AF_INET6) {
 733                 error = EAFNOSUPPORT;
 734                 goto out;
 735         }
 736 #ifdef ENABLE_DEFAULT_SCOPE
 737         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 738                 /* avoid overwrites */
 739                 tmp = *addr;
 740                 addr = &tmp;
 741                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 742         }
 743 #endif
 744         /* Source address selection. XXX: need pcblookup? */
 745         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 746                              inp->in6p_moptions, &inp->in6p_route,
 747                              &inp->in6p_laddr, &error, NULL);
 748         if (in6a == NULL) {
 749                 if (error == 0)
 750                         error = EADDRNOTAVAIL;
 751         } else {
 752                 inp->in6p_laddr = *in6a;
 753                 inp->in6p_faddr = addr->sin6_addr;
 754                 soisconnected(so);
 755                 error = 0;
 756         }
 757 out:
 758         lwkt_replymsg(&msg->connect.base.lmsg, error);
 759 }
 760
 761 static void
 762 rip6_shutdown(netmsg_t msg)
 763 {
 764         socantsendmore(msg->shutdown.base.nm_so);
 765         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
 766 }
 767
 768 static void
 769 rip6_send(netmsg_t msg)
 770 {
 771         struct socket *so = msg->send.base.nm_so;
 772         struct mbuf *m = msg->send.nm_m;
 773         struct sockaddr *nam = msg->send.nm_addr;
 774         struct mbuf *control = msg->send.nm_control;
 775         struct inpcb *inp = so->so_pcb;
 776         struct sockaddr_in6 tmp;
 777         struct sockaddr_in6 *dst;
 778         int error;
 779
 780         /* always copy sockaddr to avoid overwrites */
 781         if (so->so_state & SS_ISCONNECTED) {
 782                 if (nam) {
 783                         m_freem(m);
 784                         error = EISCONN;
 785                         goto out;
 786                 }
 787                 /* XXX */
 788                 bzero(&tmp, sizeof(tmp));
 789                 tmp.sin6_family = AF_INET6;
 790                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 791                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 792                       sizeof(struct in6_addr));
 793                 dst = &tmp;
 794         } else {
 795                 if (nam == NULL) {
 796                         m_freem(m);
 797                         error = ENOTCONN;
 798                         goto out;
 799                 }
 800                 tmp = *(struct sockaddr_in6 *)nam;
 801                 dst = &tmp;
 802         }
 803 #ifdef ENABLE_DEFAULT_SCOPE
 804         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 805                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 806         }
 807 #endif
 808         error = rip6_output(m, so, dst, control);
 809 out:
 810         lwkt_replymsg(&msg->send.base.lmsg, error);
 811 }
 812
 813 struct pr_usrreqs rip6_usrreqs = {
 814         .pru_abort = rip6_abort,
 815         .pru_accept = pr_generic_notsupp,
 816         .pru_attach = rip6_attach,
 817         .pru_bind = rip6_bind,
 818         .pru_connect = rip6_connect,
 819         .pru_connect2 = pr_generic_notsupp,
 820         .pru_control = in6_control_dispatch,
 821         .pru_detach = rip6_detach,
 822         .pru_disconnect = rip6_disconnect,
 823         .pru_listen = pr_generic_notsupp,
 824         .pru_peeraddr = in6_setpeeraddr_dispatch,
 825         .pru_rcvd = pr_generic_notsupp,
 826         .pru_rcvoob = pr_generic_notsupp,
 827         .pru_send = rip6_send,
 828         .pru_sense = pru_sense_null,
 829         .pru_shutdown = rip6_shutdown,
 830         .pru_sockaddr = in6_setsockaddr_dispatch,
 831         .pru_sosend = sosend,
 832         .pru_soreceive = soreceive
 833 };