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