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. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  61  */
  62
  63 #include "opt_ipsec.h"
  64 #include "opt_inet6.h"
  65
  66 #include <sys/param.h>
  67 #include <sys/malloc.h>
  68 #include <sys/proc.h>
  69 #include <sys/priv.h>
  70 #include <sys/mbuf.h>
  71 #include <sys/socket.h>
  72 #include <sys/jail.h>
  73 #include <sys/protosw.h>
  74 #include <sys/socketvar.h>
  75 #include <sys/errno.h>
  76 #include <sys/systm.h>
  77
  78 #include <sys/thread2.h>
  79 #include <sys/socketvar2.h>
  80 #include <sys/msgport2.h>
  81
  82 #include <net/if.h>
  83 #include <net/route.h>
  84 #include <net/if_types.h>
  85
  86 #include <netinet/in.h>
  87 #include <netinet/in_var.h>
  88 #include <netinet/in_systm.h>
  89 #include <netinet/ip6.h>
  90 #include <netinet6/ip6_var.h>
  91 #include <netinet6/ip6_mroute.h>
  92 #include <netinet/icmp6.h>
  93 #include <netinet/in_pcb.h>
  94 #include <netinet6/in6_pcb.h>
  95 #include <netinet6/nd6.h>
  96 #include <netinet6/ip6protosw.h>
  97 #ifdef ENABLE_DEFAULT_SCOPE
  98 #include <netinet6/scope6_var.h>
  99 #endif
 100 #include <netinet6/raw_ip6.h>
 101
 102 #ifdef IPSEC
 103 #include <netinet6/ipsec.h>
 104 #include <netinet6/ipsec6.h>
 105 #endif /*IPSEC*/
 106
 107 #ifdef FAST_IPSEC
 108 #include <netproto/ipsec/ipsec.h>
 109 #include <netproto/ipsec/ipsec6.h>
 110 #endif /* FAST_IPSEC */
 111
 112 #include <machine/stdarg.h>
 113
 114 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 115 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 116
 117 /*
 118  * Raw interface to IP6 protocol.
 119  */
 120
 121 extern struct   inpcbinfo ripcbinfo;
 122 extern u_long   rip_sendspace;
 123 extern u_long   rip_recvspace;
 124
 125 struct rip6stat rip6stat;
 126
 127 /*
 128  * Setup generic address and protocol structures
 129  * for raw_input routine, then pass them along with
 130  * mbuf chain.
 131  */
 132 int
 133 rip6_input(struct mbuf **mp, int *offp, int proto)
 134 {
 135         struct mbuf *m = *mp;
 136         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 137         struct inpcb *in6p;
 138         struct inpcb *last = NULL;
 139         struct mbuf *opts = NULL;
 140         struct sockaddr_in6 rip6src;
 141
 142         rip6stat.rip6s_ipackets++;
 143
 144         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 145                 /* XXX send icmp6 host/port unreach? */
 146                 m_freem(m);
 147                 return IPPROTO_DONE;
 148         }
 149
 150         init_sin6(&rip6src, m); /* general init */
 151
 152         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 153                 if (in6p->in6p_flags & INP_PLACEMARKER)
 154                         continue;
 155                 if (!INP_ISIPV6(in6p))
 156                         continue;
 157                 if (in6p->in6p_ip6_nxt &&
 158                     in6p->in6p_ip6_nxt != proto)
 159                         continue;
 160                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 161                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 162                         continue;
 163                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 164                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 165                         continue;
 166                 if (in6p->in6p_cksum != -1) {
 167                         rip6stat.rip6s_isum++;
 168                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 169                             m->m_pkthdr.len - *offp)) {
 170                                 rip6stat.rip6s_badsum++;
 171                                 continue;
 172                         }
 173                 }
 174                 if (last) {
 175                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 176
 177 #ifdef IPSEC
 178                         /*
 179                          * Check AH/ESP integrity.
 180                          */
 181                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 182                                 m_freem(n);
 183                                 ipsec6stat.in_polvio++;
 184                                 /* do not inject data into pcb */
 185                         } else
 186 #endif /*IPSEC*/
 187 #ifdef FAST_IPSEC
 188                         /*
 189                          * Check AH/ESP integrity.
 190                          */
 191                         if (n && ipsec6_in_reject(n, last)) {
 192                                 m_freem(n);
 193                                 /* do not inject data into pcb */
 194                         } else
 195 #endif /*FAST_IPSEC*/
 196                         if (n) {
 197                                 struct socket *so;
 198
 199                                 so = last->in6p_socket;
 200                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 201                                     (so->so_options & SO_TIMESTAMP)) {
 202                                         ip6_savecontrol(last, &opts, ip6, n);
 203                                 }
 204                                 /* strip intermediate headers */
 205                                 m_adj(n, *offp);
 206                                 lwkt_gettoken(&so->so_rcv.ssb_token);
 207                                 if (ssb_appendaddr(&so->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(so);
 216                                 }
 217                                 lwkt_reltoken(&so->so_rcv.ssb_token);
 218                                 opts = NULL;
 219                         }
 220                 }
 221                 last = in6p;
 222         }
 223 #ifdef IPSEC
 224         /*
 225          * Check AH/ESP integrity.
 226          */
 227         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 228                 m_freem(m);
 229                 ipsec6stat.in_polvio++;
 230                 ip6stat.ip6s_delivered--;
 231                 /* do not inject data into pcb */
 232         } else
 233 #endif /*IPSEC*/
 234 #ifdef FAST_IPSEC
 235         /*
 236          * Check AH/ESP integrity.
 237          */
 238         if (last && ipsec6_in_reject(m, last)) {
 239                 m_freem(m);
 240                 ip6stat.ip6s_delivered--;
 241                 /* do not inject data into pcb */
 242         } else
 243 #endif /*FAST_IPSEC*/
 244         if (last) {
 245                 struct socket *so;
 246
 247                 so = last->in6p_socket;
 248                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 249                     (so->so_options & SO_TIMESTAMP)) {
 250                         ip6_savecontrol(last, &opts, ip6, m);
 251                 }
 252                 /* strip intermediate headers */
 253                 m_adj(m, *offp);
 254                 lwkt_gettoken(&so->so_rcv.ssb_token);
 255                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
 256                                    m, opts) == 0) {
 257                         m_freem(m);
 258                         if (opts)
 259                                 m_freem(opts);
 260                         rip6stat.rip6s_fullsock++;
 261                 } else {
 262                         sorwakeup(so);
 263                 }
 264                 lwkt_reltoken(&so->so_rcv.ssb_token);
 265         } else {
 266                 rip6stat.rip6s_nosock++;
 267                 if (m->m_flags & M_MCAST)
 268                         rip6stat.rip6s_nosockmcast++;
 269                 if (proto == IPPROTO_NONE)
 270                         m_freem(m);
 271                 else {
 272                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 273                         icmp6_error(m, ICMP6_PARAM_PROB,
 274                                     ICMP6_PARAMPROB_NEXTHEADER,
 275                                     prvnxtp - mtod(m, char *));
 276                 }
 277                 ip6stat.ip6s_delivered--;
 278         }
 279         return IPPROTO_DONE;
 280 }
 281
 282 void
 283 rip6_ctlinput(netmsg_t msg)
 284 {
 285         int cmd = msg->ctlinput.nm_cmd;
 286         struct sockaddr *sa = msg->ctlinput.nm_arg;
 287         void *d = msg->ctlinput.nm_extra;
 288         struct ip6ctlparam *ip6cp = NULL;
 289         const struct sockaddr_in6 *sa6_src = NULL;
 290         inp_notify_t notify = in6_rtchange;
 291
 292         if (sa->sa_family != AF_INET6 ||
 293             sa->sa_len != sizeof(struct sockaddr_in6))
 294                 goto out;
 295
 296         if ((unsigned)cmd >= PRC_NCMDS)
 297                 goto out;
 298         if (PRC_IS_REDIRECT(cmd))
 299                 notify = in6_rtchange, d = NULL;
 300         else if (cmd == PRC_HOSTDEAD)
 301                 d = NULL;
 302         else if (inet6ctlerrmap[cmd] == 0)
 303                 goto out;
 304
 305         /* if the parameter is from icmp6, decode it. */
 306         if (d != NULL) {
 307                 ip6cp = (struct ip6ctlparam *)d;
 308                 sa6_src = ip6cp->ip6c_src;
 309         } else {
 310                 sa6_src = &sa6_any;
 311         }
 312
 313         in6_pcbnotify(&ripcbinfo, sa, 0,
 314                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 315 out:
 316         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 317 }
 318
 319 /*
 320  * Generate IPv6 header and pass packet to ip6_output.
 321  * Tack on options user may have setup with control call.
 322  */
 323 int
 324 rip6_output(struct mbuf *m, struct socket *so, ...)
 325 {
 326         struct sockaddr_in6 *dstsock;
 327         struct mbuf *control;
 328         struct in6_addr *dst;
 329         struct ip6_hdr *ip6;
 330         struct inpcb *in6p;
 331         u_int   plen = m->m_pkthdr.len;
 332         int error = 0;
 333         struct ip6_pktopts opt, *optp = NULL;
 334         struct ifnet *oifp = NULL;
 335         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 336         int priv = 0;
 337         __va_list ap;
 338
 339         __va_start(ap, so);
 340         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 341         control = __va_arg(ap, struct mbuf *);
 342         __va_end(ap);
 343
 344         if (IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
 345                 error = EADDRNOTAVAIL;
 346                 goto bad;
 347         }
 348
 349         in6p = so->so_pcb;
 350
 351         priv = 0;
 352         if (so->so_cred->cr_uid == 0)
 353                 priv = 1;
 354         dst = &dstsock->sin6_addr;
 355         if (control) {
 356                 if ((error = ip6_setpktoptions(control, &opt,
 357                     in6p->in6p_outputopts,
 358                     so->so_proto->pr_protocol, priv)) != 0)
 359                         goto bad;
 360                 optp = &opt;
 361         } else
 362                 optp = in6p->in6p_outputopts;
 363
 364         /*
 365          * For an ICMPv6 packet, we should know its type and code
 366          * to update statistics.
 367          */
 368         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 369                 struct icmp6_hdr *icmp6;
 370                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 371                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 372                         error = ENOBUFS;
 373                         goto bad;
 374                 }
 375                 icmp6 = mtod(m, struct icmp6_hdr *);
 376                 type = icmp6->icmp6_type;
 377                 code = icmp6->icmp6_code;
 378         }
 379
 380         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 381         ip6 = mtod(m, struct ip6_hdr *);
 382
 383         /*
 384          * Next header might not be ICMP6 but use its pseudo header anyway.
 385          */
 386         ip6->ip6_dst = *dst;
 387
 388         /*
 389          * If the scope of the destination is link-local, embed the interface
 390          * index in the address.
 391          *
 392          * XXX advanced-api value overrides sin6_scope_id
 393          */
 394         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 395                 struct in6_pktinfo *pi;
 396
 397                 /*
 398                  * XXX Boundary check is assumed to be already done in
 399                  * ip6_setpktoptions().
 400                  */
 401                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 402                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 403                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 404                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 405                          in6p->in6p_moptions &&
 406                          in6p->in6p_moptions->im6o_multicast_ifp) {
 407                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 408                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 409                 } else if (dstsock->sin6_scope_id) {
 410                         /* boundary check */
 411                         if (dstsock->sin6_scope_id < 0
 412                          || if_index < dstsock->sin6_scope_id) {
 413                                 error = ENXIO;  /* XXX EINVAL? */
 414                                 goto bad;
 415                         }
 416                         ip6->ip6_dst.s6_addr16[1]
 417                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 418                 }
 419         }
 420
 421         /*
 422          * Source address selection.
 423          */
 424         {
 425                 struct in6_addr *in6a;
 426
 427                 if ((in6a = in6_selectsrc(dstsock, optp,
 428                                           in6p->in6p_moptions,
 429                                           &in6p->in6p_route,
 430                                           &in6p->in6p_laddr,
 431                                           &error, NULL)) == NULL) {
 432                         if (error == 0)
 433                                 error = EADDRNOTAVAIL;
 434                         goto bad;
 435                 }
 436                 ip6->ip6_src = *in6a;
 437                 if (in6p->in6p_route.ro_rt)
 438                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 439         }
 440         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 441                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 442         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 443                 (IPV6_VERSION & IPV6_VERSION_MASK);
 444         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 445         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 446         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 447
 448         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 449             in6p->in6p_cksum != -1) {
 450                 struct mbuf *n;
 451                 int off;
 452                 u_int16_t *p;
 453
 454                 /* compute checksum */
 455                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 456                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 457                 else
 458                         off = in6p->in6p_cksum;
 459                 if (plen < off + 1) {
 460                         error = EINVAL;
 461                         goto bad;
 462                 }
 463                 off += sizeof(struct ip6_hdr);
 464
 465                 n = m;
 466                 while (n && n->m_len <= off) {
 467                         off -= n->m_len;
 468                         n = n->m_next;
 469                 }
 470                 if (!n)
 471                         goto bad;
 472                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 473                 *p = 0;
 474                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 475         }
 476
 477         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 478                            in6p->in6p_moptions, &oifp, in6p);
 479         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 480                 if (oifp)
 481                         icmp6_ifoutstat_inc(oifp, type, code);
 482                 icmp6stat.icp6s_outhist[type]++;
 483         } else
 484                 rip6stat.rip6s_opackets++;
 485
 486         goto freectl;
 487
 488 bad:
 489         if (m)
 490                 m_freem(m);
 491
 492 freectl:
 493         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 494                 RTFREE(optp->ip6po_route.ro_rt);
 495         if (control) {
 496                 if (optp == &opt)
 497                         ip6_clearpktopts(optp, -1);
 498                 m_freem(control);
 499         }
 500         return (error);
 501 }
 502
 503 /*
 504  * Raw IPv6 socket option processing.
 505  */
 506 void
 507 rip6_ctloutput(netmsg_t msg)
 508 {
 509         struct socket *so = msg->ctloutput.base.nm_so;
 510         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 511         int error;
 512
 513         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 514                 /*
 515                  * XXX: is it better to call icmp6_ctloutput() directly
 516                  * from protosw?
 517                  */
 518                 icmp6_ctloutput(msg);
 519                 /* msg invalid now */
 520                 return;
 521         }
 522         if (sopt->sopt_level != IPPROTO_IPV6) {
 523                 error = EINVAL;
 524                 goto out;
 525         }
 526
 527         error = 0;
 528
 529         switch (sopt->sopt_dir) {
 530         case SOPT_GET:
 531                 switch (sopt->sopt_name) {
 532                 case MRT6_INIT:
 533                 case MRT6_DONE:
 534                 case MRT6_ADD_MIF:
 535                 case MRT6_DEL_MIF:
 536                 case MRT6_ADD_MFC:
 537                 case MRT6_DEL_MFC:
 538                 case MRT6_PIM:
 539                         error = ip6_mrouter_get(so, sopt);
 540                         break;
 541                 case IPV6_CHECKSUM:
 542                         error = ip6_raw_ctloutput(so, sopt);
 543                         break;
 544                 default:
 545                         error = ip6_ctloutput(so, sopt);
 546                         break;
 547                 }
 548                 break;
 549
 550         case SOPT_SET:
 551                 switch (sopt->sopt_name) {
 552                 case MRT6_INIT:
 553                 case MRT6_DONE:
 554                 case MRT6_ADD_MIF:
 555                 case MRT6_DEL_MIF:
 556                 case MRT6_ADD_MFC:
 557                 case MRT6_DEL_MFC:
 558                 case MRT6_PIM:
 559                         error = ip6_mrouter_set(so, sopt);
 560                         break;
 561                 case IPV6_CHECKSUM:
 562                         error = ip6_raw_ctloutput(so, sopt);
 563                         break;
 564                 default:
 565                         error = ip6_ctloutput(so, sopt);
 566                         break;
 567                 }
 568                 break;
 569         }
 570 out:
 571         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 572 }
 573
 574 static void
 575 rip6_attach(netmsg_t msg)
 576 {
 577         struct socket *so = msg->attach.base.nm_so;
 578         int proto = msg->attach.nm_proto;
 579         struct pru_attach_info *ai = msg->attach.nm_ai;
 580         struct inpcb *inp;
 581         int error;
 582
 583         inp = so->so_pcb;
 584         if (inp)
 585                 panic("rip6_attach");
 586         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 587         if (error)
 588                 goto out;
 589
 590         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 591         if (error)
 592                 goto out;
 593         crit_enter();
 594         error = in_pcballoc(so, &ripcbinfo);
 595         crit_exit();
 596         if (error)
 597                 goto out;
 598         inp = (struct inpcb *)so->so_pcb;
 599         inp->in6p_ip6_nxt = (long)proto;
 600         inp->in6p_hops = -1;    /* use kernel default */
 601         inp->in6p_cksum = -1;
 602         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
 603                                       M_NOWAIT);
 604         if (inp->in6p_icmp6filt != NULL)
 605                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 606         error = 0;
 607 out:
 608         lwkt_replymsg(&msg->attach.base.lmsg, error);
 609 }
 610
 611 static void
 612 rip6_detach(netmsg_t msg)
 613 {
 614         struct socket *so = msg->detach.base.nm_so;
 615         struct inpcb *inp;
 616
 617         inp = so->so_pcb;
 618         if (inp == NULL)
 619                 panic("rip6_detach");
 620         /* xxx: RSVP */
 621         if (so == ip6_mrouter)
 622                 ip6_mrouter_done();
 623         if (inp->in6p_icmp6filt) {
 624                 kfree(inp->in6p_icmp6filt, M_PCB);
 625                 inp->in6p_icmp6filt = NULL;
 626         }
 627         in6_pcbdetach(inp);
 628         lwkt_replymsg(&msg->detach.base.lmsg, 0);
 629 }
 630
 631 /*
 632  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 633  *       will sofree() it when we return.
 634  */
 635 static void
 636 rip6_abort(netmsg_t msg)
 637 {
 638         soisdisconnected(msg->abort.base.nm_so);
 639         rip6_detach(msg);
 640         /* msg invalid now */
 641 }
 642
 643 static void
 644 rip6_disconnect(netmsg_t msg)
 645 {
 646         struct socket *so = msg->disconnect.base.nm_so;
 647         struct inpcb *inp = so->so_pcb;
 648
 649         if (so->so_state & SS_ISCONNECTED) {
 650                 inp->in6p_faddr = kin6addr_any;
 651                 soreference(so);
 652                 rip6_abort(msg);
 653                 /* msg invalid now */
 654                 sofree(so);
 655                 return;
 656         }
 657         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
 658 }
 659
 660 static void
 661 rip6_bind(netmsg_t msg)
 662 {
 663         struct socket *so = msg->bind.base.nm_so;
 664         struct sockaddr *nam = msg->bind.nm_nam;
 665         struct inpcb *inp = so->so_pcb;
 666         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 667         struct ifaddr *ia = NULL;
 668         int error;
 669
 670         if (nam->sa_len != sizeof(*addr)) {
 671                 error = EINVAL;
 672                 goto out;
 673         }
 674
 675         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
 676                 error = EADDRNOTAVAIL;
 677                 goto out;
 678         }
 679         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
 680                 error = EADDRNOTAVAIL;
 681                 goto out;
 682         }
 683 #ifdef ENABLE_DEFAULT_SCOPE
 684         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 685                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 686         }
 687 #endif
 688         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 689             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
 690                 error = EADDRNOTAVAIL;
 691                 goto out;
 692         }
 693         if (ia &&
 694             ((struct in6_ifaddr *)ia)->ia6_flags &
 695             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 696              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 697                 error = EADDRNOTAVAIL;
 698                 goto out;
 699         }
 700         inp->in6p_laddr = addr->sin6_addr;
 701         error = 0;
 702 out:
 703         lwkt_replymsg(&msg->bind.base.lmsg, error);
 704 }
 705
 706 static void
 707 rip6_connect(netmsg_t msg)
 708 {
 709         struct socket *so = msg->connect.base.nm_so;
 710         struct sockaddr *nam = msg->connect.nm_nam;
 711         struct inpcb *inp = so->so_pcb;
 712         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 713         struct in6_addr *in6a = NULL;
 714         int error = 0;
 715 #ifdef ENABLE_DEFAULT_SCOPE
 716         struct sockaddr_in6 tmp;
 717 #endif
 718
 719         if (nam->sa_len != sizeof(*addr)) {
 720                 error = EINVAL;
 721                 goto out;
 722         }
 723         if (TAILQ_EMPTY(&ifnet)) {
 724                 error = EADDRNOTAVAIL;
 725                 goto out;
 726         }
 727         if (addr->sin6_family != AF_INET6) {
 728                 error = EAFNOSUPPORT;
 729                 goto out;
 730         }
 731         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
 732                 error = EADDRNOTAVAIL;
 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 };