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  */
  31
  32 /*
  33  * Copyright (c) 1982, 1986, 1988, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  65  */
  66
  67 #include "opt_ipsec.h"
  68 #include "opt_inet6.h"
  69
  70 #include <sys/param.h>
  71 #include <sys/malloc.h>
  72 #include <sys/proc.h>
  73 #include <sys/priv.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
  82 #include <sys/thread2.h>
  83 #include <sys/socketvar2.h>
  84 #include <sys/msgport2.h>
  85
  86 #include <net/if.h>
  87 #include <net/route.h>
  88 #include <net/if_types.h>
  89
  90 #include <netinet/in.h>
  91 #include <netinet/in_var.h>
  92 #include <netinet/in_systm.h>
  93 #include <netinet/ip6.h>
  94 #include <netinet6/ip6_var.h>
  95 #include <netinet6/ip6_mroute.h>
  96 #include <netinet/icmp6.h>
  97 #include <netinet/in_pcb.h>
  98 #include <netinet6/in6_pcb.h>
  99 #include <netinet6/nd6.h>
 100 #include <netinet6/ip6protosw.h>
 101 #ifdef ENABLE_DEFAULT_SCOPE
 102 #include <netinet6/scope6_var.h>
 103 #endif
 104 #include <netinet6/raw_ip6.h>
 105
 106 #ifdef IPSEC
 107 #include <netinet6/ipsec.h>
 108 #include <netinet6/ipsec6.h>
 109 #endif /*IPSEC*/
 110
 111 #ifdef FAST_IPSEC
 112 #include <netproto/ipsec/ipsec.h>
 113 #include <netproto/ipsec/ipsec6.h>
 114 #endif /* FAST_IPSEC */
 115
 116 #include <machine/stdarg.h>
 117
 118 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 119 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 120
 121 /*
 122  * Raw interface to IP6 protocol.
 123  */
 124
 125 extern struct   inpcbinfo ripcbinfo;
 126 extern u_long   rip_sendspace;
 127 extern u_long   rip_recvspace;
 128
 129 struct rip6stat rip6stat;
 130
 131 /*
 132  * Setup generic address and protocol structures
 133  * for raw_input routine, then pass them along with
 134  * mbuf chain.
 135  */
 136 int
 137 rip6_input(struct mbuf **mp, int *offp, int proto)
 138 {
 139         struct mbuf *m = *mp;
 140         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 141         struct inpcb *in6p;
 142         struct inpcb *last = 0;
 143         struct mbuf *opts = NULL;
 144         struct sockaddr_in6 rip6src;
 145
 146         rip6stat.rip6s_ipackets++;
 147
 148         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 149                 /* XXX send icmp6 host/port unreach? */
 150                 m_freem(m);
 151                 return IPPROTO_DONE;
 152         }
 153
 154         init_sin6(&rip6src, m); /* general init */
 155
 156         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 157                 if (in6p->in6p_flags & INP_PLACEMARKER)
 158                         continue;
 159                 if (!(in6p->in6p_vflag & INP_IPV6))
 160                         continue;
 161                 if (in6p->in6p_ip6_nxt &&
 162                     in6p->in6p_ip6_nxt != proto)
 163                         continue;
 164                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 165                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 166                         continue;
 167                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 168                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 169                         continue;
 170                 if (in6p->in6p_cksum != -1) {
 171                         rip6stat.rip6s_isum++;
 172                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 173                             m->m_pkthdr.len - *offp)) {
 174                                 rip6stat.rip6s_badsum++;
 175                                 continue;
 176                         }
 177                 }
 178                 if (last) {
 179                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 180
 181 #ifdef IPSEC
 182                         /*
 183                          * Check AH/ESP integrity.
 184                          */
 185                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 186                                 m_freem(n);
 187                                 ipsec6stat.in_polvio++;
 188                                 /* do not inject data into pcb */
 189                         } else
 190 #endif /*IPSEC*/
 191 #ifdef FAST_IPSEC
 192                         /*
 193                          * Check AH/ESP integrity.
 194                          */
 195                         if (n && ipsec6_in_reject(n, last)) {
 196                                 m_freem(n);
 197                                 /* do not inject data into pcb */
 198                         } else
 199 #endif /*FAST_IPSEC*/
 200                         if (n) {
 201                                 struct socket *so;
 202
 203                                 so = last->in6p_socket;
 204                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 205                                     (so->so_options & SO_TIMESTAMP)) {
 206                                         ip6_savecontrol(last, &opts, ip6, n);
 207                                 }
 208                                 /* strip intermediate headers */
 209                                 m_adj(n, *offp);
 210                                 lwkt_gettoken(&so->so_rcv.ssb_token);
 211                                 if (ssb_appendaddr(&so->so_rcv,
 212                                                 (struct sockaddr *)&rip6src,
 213                                                  n, opts) == 0) {
 214                                         m_freem(n);
 215                                         if (opts)
 216                                                 m_freem(opts);
 217                                         rip6stat.rip6s_fullsock++;
 218                                 } else {
 219                                         sorwakeup(so);
 220                                 }
 221                                 lwkt_reltoken(&so->so_rcv.ssb_token);
 222                                 opts = NULL;
 223                         }
 224                 }
 225                 last = in6p;
 226         }
 227 #ifdef IPSEC
 228         /*
 229          * Check AH/ESP integrity.
 230          */
 231         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 232                 m_freem(m);
 233                 ipsec6stat.in_polvio++;
 234                 ip6stat.ip6s_delivered--;
 235                 /* do not inject data into pcb */
 236         } else
 237 #endif /*IPSEC*/
 238 #ifdef FAST_IPSEC
 239         /*
 240          * Check AH/ESP integrity.
 241          */
 242         if (last && ipsec6_in_reject(m, last)) {
 243                 m_freem(m);
 244                 ip6stat.ip6s_delivered--;
 245                 /* do not inject data into pcb */
 246         } else
 247 #endif /*FAST_IPSEC*/
 248         if (last) {
 249                 struct socket *so;
 250
 251                 so = last->in6p_socket;
 252                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 253                     (so->so_options & SO_TIMESTAMP)) {
 254                         ip6_savecontrol(last, &opts, ip6, m);
 255                 }
 256                 /* strip intermediate headers */
 257                 m_adj(m, *offp);
 258                 lwkt_gettoken(&so->so_rcv.ssb_token);
 259                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
 260                                    m, opts) == 0) {
 261                         m_freem(m);
 262                         if (opts)
 263                                 m_freem(opts);
 264                         rip6stat.rip6s_fullsock++;
 265                 } else {
 266                         sorwakeup(so);
 267                 }
 268                 lwkt_reltoken(&so->so_rcv.ssb_token);
 269         } else {
 270                 rip6stat.rip6s_nosock++;
 271                 if (m->m_flags & M_MCAST)
 272                         rip6stat.rip6s_nosockmcast++;
 273                 if (proto == IPPROTO_NONE)
 274                         m_freem(m);
 275                 else {
 276                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 277                         icmp6_error(m, ICMP6_PARAM_PROB,
 278                                     ICMP6_PARAMPROB_NEXTHEADER,
 279                                     prvnxtp - mtod(m, char *));
 280                 }
 281                 ip6stat.ip6s_delivered--;
 282         }
 283         return IPPROTO_DONE;
 284 }
 285
 286 void
 287 rip6_ctlinput(netmsg_t msg)
 288 {
 289         int cmd = msg->ctlinput.nm_cmd;
 290         struct sockaddr *sa = msg->ctlinput.nm_arg;
 291         void *d = msg->ctlinput.nm_extra;
 292         struct ip6_hdr *ip6;
 293         struct mbuf *m;
 294         int off = 0;
 295         struct ip6ctlparam *ip6cp = NULL;
 296         const struct sockaddr_in6 *sa6_src = NULL;
 297         void (*notify) (struct inpcb *, int) = in6_rtchange;
 298
 299         if (sa->sa_family != AF_INET6 ||
 300             sa->sa_len != sizeof(struct sockaddr_in6))
 301                 goto out;
 302
 303         if ((unsigned)cmd >= PRC_NCMDS)
 304                 goto out;
 305         if (PRC_IS_REDIRECT(cmd))
 306                 notify = in6_rtchange, d = NULL;
 307         else if (cmd == PRC_HOSTDEAD)
 308                 d = NULL;
 309         else if (inet6ctlerrmap[cmd] == 0)
 310                 goto out;
 311
 312         /* if the parameter is from icmp6, decode it. */
 313         if (d != NULL) {
 314                 ip6cp = (struct ip6ctlparam *)d;
 315                 m = ip6cp->ip6c_m;
 316                 ip6 = ip6cp->ip6c_ip6;
 317                 off = ip6cp->ip6c_off;
 318                 sa6_src = ip6cp->ip6c_src;
 319         } else {
 320                 m = NULL;
 321                 ip6 = NULL;
 322                 sa6_src = &sa6_any;
 323         }
 324
 325         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
 326                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 327 out:
 328         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 329 }
 330
 331 /*
 332  * Generate IPv6 header and pass packet to ip6_output.
 333  * Tack on options user may have setup with control call.
 334  */
 335 int
 336 rip6_output(struct mbuf *m, struct socket *so, ...)
 337 {
 338         struct sockaddr_in6 *dstsock;
 339         struct mbuf *control;
 340         struct in6_addr *dst;
 341         struct ip6_hdr *ip6;
 342         struct inpcb *in6p;
 343         u_int   plen = m->m_pkthdr.len;
 344         int error = 0;
 345         struct ip6_pktopts opt, *optp = 0;
 346         struct ifnet *oifp = NULL;
 347         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 348         int priv = 0;
 349         __va_list ap;
 350
 351         __va_start(ap, so);
 352         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 353         control = __va_arg(ap, struct mbuf *);
 354         __va_end(ap);
 355
 356         in6p = so->so_pcb;
 357
 358         priv = 0;
 359         if (so->so_cred->cr_uid == 0)
 360                 priv = 1;
 361         dst = &dstsock->sin6_addr;
 362         if (control) {
 363                 if ((error = ip6_setpktoptions(control, &opt,
 364                     in6p->in6p_outputopts,
 365                     so->so_proto->pr_protocol, priv)) != 0)
 366                         goto bad;
 367                 optp = &opt;
 368         } else
 369                 optp = in6p->in6p_outputopts;
 370
 371         /*
 372          * For an ICMPv6 packet, we should know its type and code
 373          * to update statistics.
 374          */
 375         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 376                 struct icmp6_hdr *icmp6;
 377                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 378                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 379                         error = ENOBUFS;
 380                         goto bad;
 381                 }
 382                 icmp6 = mtod(m, struct icmp6_hdr *);
 383                 type = icmp6->icmp6_type;
 384                 code = icmp6->icmp6_code;
 385         }
 386
 387         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 388         ip6 = mtod(m, struct ip6_hdr *);
 389
 390         /*
 391          * Next header might not be ICMP6 but use its pseudo header anyway.
 392          */
 393         ip6->ip6_dst = *dst;
 394
 395         /*
 396          * If the scope of the destination is link-local, embed the interface
 397          * index in the address.
 398          *
 399          * XXX advanced-api value overrides sin6_scope_id
 400          */
 401         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 402                 struct in6_pktinfo *pi;
 403
 404                 /*
 405                  * XXX Boundary check is assumed to be already done in
 406                  * ip6_setpktoptions().
 407                  */
 408                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 409                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 410                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 411                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 412                          in6p->in6p_moptions &&
 413                          in6p->in6p_moptions->im6o_multicast_ifp) {
 414                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 415                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 416                 } else if (dstsock->sin6_scope_id) {
 417                         /* boundary check */
 418                         if (dstsock->sin6_scope_id < 0
 419                          || if_index < dstsock->sin6_scope_id) {
 420                                 error = ENXIO;  /* XXX EINVAL? */
 421                                 goto bad;
 422                         }
 423                         ip6->ip6_dst.s6_addr16[1]
 424                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 425                 }
 426         }
 427
 428         /*
 429          * Source address selection.
 430          */
 431         {
 432                 struct in6_addr *in6a;
 433
 434                 if ((in6a = in6_selectsrc(dstsock, optp,
 435                                           in6p->in6p_moptions,
 436                                           &in6p->in6p_route,
 437                                           &in6p->in6p_laddr,
 438                                           &error, NULL)) == NULL) {
 439                         if (error == 0)
 440                                 error = EADDRNOTAVAIL;
 441                         goto bad;
 442                 }
 443                 ip6->ip6_src = *in6a;
 444                 if (in6p->in6p_route.ro_rt)
 445                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 446         }
 447         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 448                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 449         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 450                 (IPV6_VERSION & IPV6_VERSION_MASK);
 451         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 452         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 453         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 454
 455         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 456             in6p->in6p_cksum != -1) {
 457                 struct mbuf *n;
 458                 int off;
 459                 u_int16_t *p;
 460
 461                 /* compute checksum */
 462                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 463                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 464                 else
 465                         off = in6p->in6p_cksum;
 466                 if (plen < off + 1) {
 467                         error = EINVAL;
 468                         goto bad;
 469                 }
 470                 off += sizeof(struct ip6_hdr);
 471
 472                 n = m;
 473                 while (n && n->m_len <= off) {
 474                         off -= n->m_len;
 475                         n = n->m_next;
 476                 }
 477                 if (!n)
 478                         goto bad;
 479                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 480                 *p = 0;
 481                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 482         }
 483
 484         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 485                            in6p->in6p_moptions, &oifp, in6p);
 486         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 487                 if (oifp)
 488                         icmp6_ifoutstat_inc(oifp, type, code);
 489                 icmp6stat.icp6s_outhist[type]++;
 490         } else
 491                 rip6stat.rip6s_opackets++;
 492
 493         goto freectl;
 494
 495 bad:
 496         if (m)
 497                 m_freem(m);
 498
 499 freectl:
 500         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 501                 RTFREE(optp->ip6po_route.ro_rt);
 502         if (control) {
 503                 if (optp == &opt)
 504                         ip6_clearpktopts(optp, -1);
 505                 m_freem(control);
 506         }
 507         return (error);
 508 }
 509
 510 /*
 511  * Raw IPv6 socket option processing.
 512  */
 513 void
 514 rip6_ctloutput(netmsg_t msg)
 515 {
 516         struct socket *so = msg->ctloutput.base.nm_so;;
 517         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 518         int error;
 519
 520         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 521                 /*
 522                  * XXX: is it better to call icmp6_ctloutput() directly
 523                  * from protosw?
 524                  */
 525                 icmp6_ctloutput(msg);
 526                 /* msg invalid now */
 527                 return;
 528         }
 529         if (sopt->sopt_level != IPPROTO_IPV6) {
 530                 error = EINVAL;
 531                 goto out;
 532         }
 533
 534         error = 0;
 535
 536         switch (sopt->sopt_dir) {
 537         case SOPT_GET:
 538                 switch (sopt->sopt_name) {
 539                 case MRT6_INIT:
 540                 case MRT6_DONE:
 541                 case MRT6_ADD_MIF:
 542                 case MRT6_DEL_MIF:
 543                 case MRT6_ADD_MFC:
 544                 case MRT6_DEL_MFC:
 545                 case MRT6_PIM:
 546                         error = ip6_mrouter_get(so, sopt);
 547                         break;
 548                 case IPV6_CHECKSUM:
 549                         error = ip6_raw_ctloutput(so, sopt);
 550                         break;
 551                 default:
 552                         error = ip6_ctloutput(so, sopt);
 553                         break;
 554                 }
 555                 break;
 556
 557         case SOPT_SET:
 558                 switch (sopt->sopt_name) {
 559                 case MRT6_INIT:
 560                 case MRT6_DONE:
 561                 case MRT6_ADD_MIF:
 562                 case MRT6_DEL_MIF:
 563                 case MRT6_ADD_MFC:
 564                 case MRT6_DEL_MFC:
 565                 case MRT6_PIM:
 566                         error = ip6_mrouter_set(so, sopt);
 567                         break;
 568                 case IPV6_CHECKSUM:
 569                         error = ip6_raw_ctloutput(so, sopt);
 570                         break;
 571                 default:
 572                         error = ip6_ctloutput(so, sopt);
 573                         break;
 574                 }
 575                 break;
 576         }
 577 out:
 578         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 579 }
 580
 581 static void
 582 rip6_attach(netmsg_t msg)
 583 {
 584         struct socket *so = msg->attach.base.nm_so;
 585         int proto = msg->attach.nm_proto;
 586         struct pru_attach_info *ai = msg->attach.nm_ai;
 587         struct inpcb *inp;
 588         int error;
 589
 590         inp = so->so_pcb;
 591         if (inp)
 592                 panic("rip6_attach");
 593         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 594         if (error)
 595                 goto out;
 596
 597         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 598         if (error)
 599                 goto out;
 600         crit_enter();
 601         error = in_pcballoc(so, &ripcbinfo);
 602         crit_exit();
 603         if (error)
 604                 goto out;
 605         inp = (struct inpcb *)so->so_pcb;
 606         inp->inp_vflag |= INP_IPV6;
 607         inp->in6p_ip6_nxt = (long)proto;
 608         inp->in6p_hops = -1;    /* use kernel default */
 609         inp->in6p_cksum = -1;
 610         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
 611                                       M_NOWAIT);
 612         if (inp->in6p_icmp6filt != NULL)
 613                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 614         error = 0;
 615 out:
 616         lwkt_replymsg(&msg->attach.base.lmsg, error);
 617 }
 618
 619 static void
 620 rip6_detach(netmsg_t msg)
 621 {
 622         struct socket *so = msg->detach.base.nm_so;
 623         struct inpcb *inp;
 624
 625         inp = so->so_pcb;
 626         if (inp == NULL)
 627                 panic("rip6_detach");
 628         /* xxx: RSVP */
 629         if (so == ip6_mrouter)
 630                 ip6_mrouter_done();
 631         if (inp->in6p_icmp6filt) {
 632                 kfree(inp->in6p_icmp6filt, M_PCB);
 633                 inp->in6p_icmp6filt = NULL;
 634         }
 635         in6_pcbdetach(inp);
 636         lwkt_replymsg(&msg->detach.base.lmsg, 0);
 637 }
 638
 639 /*
 640  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 641  *       will sofree() it when we return.
 642  */
 643 static void
 644 rip6_abort(netmsg_t msg)
 645 {
 646         soisdisconnected(msg->abort.base.nm_so);
 647         rip6_detach(msg);
 648         /* msg invalid now */
 649 }
 650
 651 static void
 652 rip6_disconnect(netmsg_t msg)
 653 {
 654         struct socket *so = msg->disconnect.base.nm_so;
 655         struct inpcb *inp = so->so_pcb;
 656
 657         if (so->so_state & SS_ISCONNECTED) {
 658                 inp->in6p_faddr = kin6addr_any;
 659                 soreference(so);
 660                 rip6_abort(msg);
 661                 /* msg invalid now */
 662                 sofree(so);
 663                 return;
 664         }
 665         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
 666 }
 667
 668 static void
 669 rip6_bind(netmsg_t msg)
 670 {
 671         struct socket *so = msg->bind.base.nm_so;
 672         struct sockaddr *nam = msg->bind.nm_nam;
 673         struct inpcb *inp = so->so_pcb;
 674         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 675         struct ifaddr *ia = NULL;
 676         int error;
 677
 678         if (nam->sa_len != sizeof(*addr)) {
 679                 error = EINVAL;
 680                 goto out;
 681         }
 682
 683         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
 684                 error = EADDRNOTAVAIL;
 685                 goto out;
 686         }
 687 #ifdef ENABLE_DEFAULT_SCOPE
 688         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 689                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 690         }
 691 #endif
 692         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 693             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
 694                 error = EADDRNOTAVAIL;
 695                 goto out;
 696         }
 697         if (ia &&
 698             ((struct in6_ifaddr *)ia)->ia6_flags &
 699             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 700              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 701                 error = EADDRNOTAVAIL;
 702                 goto out;
 703         }
 704         inp->in6p_laddr = addr->sin6_addr;
 705         error = 0;
 706 out:
 707         lwkt_replymsg(&msg->bind.base.lmsg, error);
 708 }
 709
 710 static void
 711 rip6_connect(netmsg_t msg)
 712 {
 713         struct socket *so = msg->connect.base.nm_so;
 714         struct sockaddr *nam = msg->connect.nm_nam;
 715         struct inpcb *inp = so->so_pcb;
 716         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 717         struct in6_addr *in6a = NULL;
 718         int error = 0;
 719 #ifdef ENABLE_DEFAULT_SCOPE
 720         struct sockaddr_in6 tmp;
 721 #endif
 722
 723         if (nam->sa_len != sizeof(*addr)) {
 724                 error = EINVAL;
 725                 goto out;
 726         }
 727         if (TAILQ_EMPTY(&ifnet)) {
 728                 error = EADDRNOTAVAIL;
 729                 goto out;
 730         }
 731         if (addr->sin6_family != AF_INET6) {
 732                 error = EAFNOSUPPORT;
 733                 goto out;
 734         }
 735 #ifdef ENABLE_DEFAULT_SCOPE
 736         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 737                 /* avoid overwrites */
 738                 tmp = *addr;
 739                 addr = &tmp;
 740                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 741         }
 742 #endif
 743         /* Source address selection. XXX: need pcblookup? */
 744         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 745                              inp->in6p_moptions, &inp->in6p_route,
 746                              &inp->in6p_laddr, &error, NULL);
 747         if (in6a == NULL) {
 748                 if (error == 0)
 749                         error = EADDRNOTAVAIL;
 750         } else {
 751                 inp->in6p_laddr = *in6a;
 752                 inp->in6p_faddr = addr->sin6_addr;
 753                 soisconnected(so);
 754                 error = 0;
 755         }
 756 out:
 757         lwkt_replymsg(&msg->connect.base.lmsg, error);
 758 }
 759
 760 static void
 761 rip6_shutdown(netmsg_t msg)
 762 {
 763         socantsendmore(msg->shutdown.base.nm_so);
 764         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
 765 }
 766
 767 static void
 768 rip6_send(netmsg_t msg)
 769 {
 770         struct socket *so = msg->send.base.nm_so;
 771         struct mbuf *m = msg->send.nm_m;
 772         struct sockaddr *nam = msg->send.nm_addr;
 773         struct mbuf *control = msg->send.nm_control;
 774         struct inpcb *inp = so->so_pcb;
 775         struct sockaddr_in6 tmp;
 776         struct sockaddr_in6 *dst;
 777         int error;
 778
 779         /* always copy sockaddr to avoid overwrites */
 780         if (so->so_state & SS_ISCONNECTED) {
 781                 if (nam) {
 782                         m_freem(m);
 783                         error = EISCONN;
 784                         goto out;
 785                 }
 786                 /* XXX */
 787                 bzero(&tmp, sizeof(tmp));
 788                 tmp.sin6_family = AF_INET6;
 789                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 790                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 791                       sizeof(struct in6_addr));
 792                 dst = &tmp;
 793         } else {
 794                 if (nam == NULL) {
 795                         m_freem(m);
 796                         error = ENOTCONN;
 797                         goto out;
 798                 }
 799                 tmp = *(struct sockaddr_in6 *)nam;
 800                 dst = &tmp;
 801         }
 802 #ifdef ENABLE_DEFAULT_SCOPE
 803         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 804                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 805         }
 806 #endif
 807         error = rip6_output(m, so, dst, control);
 808 out:
 809         lwkt_replymsg(&msg->send.base.lmsg, error);
 810 }
 811
 812 struct pr_usrreqs rip6_usrreqs = {
 813         .pru_abort = rip6_abort,
 814         .pru_accept = pr_generic_notsupp,
 815         .pru_attach = rip6_attach,
 816         .pru_bind = rip6_bind,
 817         .pru_connect = rip6_connect,
 818         .pru_connect2 = pr_generic_notsupp,
 819         .pru_control = in6_control_dispatch,
 820         .pru_detach = rip6_detach,
 821         .pru_disconnect = rip6_disconnect,
 822         .pru_listen = pr_generic_notsupp,
 823         .pru_peeraddr = in6_setpeeraddr_dispatch,
 824         .pru_rcvd = pr_generic_notsupp,
 825         .pru_rcvoob = pr_generic_notsupp,
 826         .pru_send = rip6_send,
 827         .pru_sense = pru_sense_null,
 828         .pru_shutdown = rip6_shutdown,
 829         .pru_sockaddr = in6_setsockaddr_dispatch,
 830         .pru_sosend = sosend,
 831         .pru_soreceive = soreceive
 832 };