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  * 4. 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 (!(in6p->in6p_vflag & INP_IPV6))
 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         void (*notify) (struct inpcb *, int) = 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.pcblisthead, 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         in6p = so->so_pcb;
 345
 346         priv = 0;
 347         if (so->so_cred->cr_uid == 0)
 348                 priv = 1;
 349         dst = &dstsock->sin6_addr;
 350         if (control) {
 351                 if ((error = ip6_setpktoptions(control, &opt,
 352                     in6p->in6p_outputopts,
 353                     so->so_proto->pr_protocol, priv)) != 0)
 354                         goto bad;
 355                 optp = &opt;
 356         } else
 357                 optp = in6p->in6p_outputopts;
 358
 359         /*
 360          * For an ICMPv6 packet, we should know its type and code
 361          * to update statistics.
 362          */
 363         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 364                 struct icmp6_hdr *icmp6;
 365                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 366                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 367                         error = ENOBUFS;
 368                         goto bad;
 369                 }
 370                 icmp6 = mtod(m, struct icmp6_hdr *);
 371                 type = icmp6->icmp6_type;
 372                 code = icmp6->icmp6_code;
 373         }
 374
 375         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 376         ip6 = mtod(m, struct ip6_hdr *);
 377
 378         /*
 379          * Next header might not be ICMP6 but use its pseudo header anyway.
 380          */
 381         ip6->ip6_dst = *dst;
 382
 383         /*
 384          * If the scope of the destination is link-local, embed the interface
 385          * index in the address.
 386          *
 387          * XXX advanced-api value overrides sin6_scope_id
 388          */
 389         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 390                 struct in6_pktinfo *pi;
 391
 392                 /*
 393                  * XXX Boundary check is assumed to be already done in
 394                  * ip6_setpktoptions().
 395                  */
 396                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 397                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 398                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 399                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 400                          in6p->in6p_moptions &&
 401                          in6p->in6p_moptions->im6o_multicast_ifp) {
 402                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 403                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 404                 } else if (dstsock->sin6_scope_id) {
 405                         /* boundary check */
 406                         if (dstsock->sin6_scope_id < 0
 407                          || if_index < dstsock->sin6_scope_id) {
 408                                 error = ENXIO;  /* XXX EINVAL? */
 409                                 goto bad;
 410                         }
 411                         ip6->ip6_dst.s6_addr16[1]
 412                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 413                 }
 414         }
 415
 416         /*
 417          * Source address selection.
 418          */
 419         {
 420                 struct in6_addr *in6a;
 421
 422                 if ((in6a = in6_selectsrc(dstsock, optp,
 423                                           in6p->in6p_moptions,
 424                                           &in6p->in6p_route,
 425                                           &in6p->in6p_laddr,
 426                                           &error, NULL)) == NULL) {
 427                         if (error == 0)
 428                                 error = EADDRNOTAVAIL;
 429                         goto bad;
 430                 }
 431                 ip6->ip6_src = *in6a;
 432                 if (in6p->in6p_route.ro_rt)
 433                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 434         }
 435         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 436                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 437         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 438                 (IPV6_VERSION & IPV6_VERSION_MASK);
 439         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 440         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 441         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 442
 443         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 444             in6p->in6p_cksum != -1) {
 445                 struct mbuf *n;
 446                 int off;
 447                 u_int16_t *p;
 448
 449                 /* compute checksum */
 450                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 451                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 452                 else
 453                         off = in6p->in6p_cksum;
 454                 if (plen < off + 1) {
 455                         error = EINVAL;
 456                         goto bad;
 457                 }
 458                 off += sizeof(struct ip6_hdr);
 459
 460                 n = m;
 461                 while (n && n->m_len <= off) {
 462                         off -= n->m_len;
 463                         n = n->m_next;
 464                 }
 465                 if (!n)
 466                         goto bad;
 467                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 468                 *p = 0;
 469                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 470         }
 471
 472         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 473                            in6p->in6p_moptions, &oifp, in6p);
 474         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 475                 if (oifp)
 476                         icmp6_ifoutstat_inc(oifp, type, code);
 477                 icmp6stat.icp6s_outhist[type]++;
 478         } else
 479                 rip6stat.rip6s_opackets++;
 480
 481         goto freectl;
 482
 483 bad:
 484         if (m)
 485                 m_freem(m);
 486
 487 freectl:
 488         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 489                 RTFREE(optp->ip6po_route.ro_rt);
 490         if (control) {
 491                 if (optp == &opt)
 492                         ip6_clearpktopts(optp, -1);
 493                 m_freem(control);
 494         }
 495         return (error);
 496 }
 497
 498 /*
 499  * Raw IPv6 socket option processing.
 500  */
 501 void
 502 rip6_ctloutput(netmsg_t msg)
 503 {
 504         struct socket *so = msg->ctloutput.base.nm_so;
 505         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 506         int error;
 507
 508         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 509                 /*
 510                  * XXX: is it better to call icmp6_ctloutput() directly
 511                  * from protosw?
 512                  */
 513                 icmp6_ctloutput(msg);
 514                 /* msg invalid now */
 515                 return;
 516         }
 517         if (sopt->sopt_level != IPPROTO_IPV6) {
 518                 error = EINVAL;
 519                 goto out;
 520         }
 521
 522         error = 0;
 523
 524         switch (sopt->sopt_dir) {
 525         case SOPT_GET:
 526                 switch (sopt->sopt_name) {
 527                 case MRT6_INIT:
 528                 case MRT6_DONE:
 529                 case MRT6_ADD_MIF:
 530                 case MRT6_DEL_MIF:
 531                 case MRT6_ADD_MFC:
 532                 case MRT6_DEL_MFC:
 533                 case MRT6_PIM:
 534                         error = ip6_mrouter_get(so, sopt);
 535                         break;
 536                 case IPV6_CHECKSUM:
 537                         error = ip6_raw_ctloutput(so, sopt);
 538                         break;
 539                 default:
 540                         error = ip6_ctloutput(so, sopt);
 541                         break;
 542                 }
 543                 break;
 544
 545         case SOPT_SET:
 546                 switch (sopt->sopt_name) {
 547                 case MRT6_INIT:
 548                 case MRT6_DONE:
 549                 case MRT6_ADD_MIF:
 550                 case MRT6_DEL_MIF:
 551                 case MRT6_ADD_MFC:
 552                 case MRT6_DEL_MFC:
 553                 case MRT6_PIM:
 554                         error = ip6_mrouter_set(so, sopt);
 555                         break;
 556                 case IPV6_CHECKSUM:
 557                         error = ip6_raw_ctloutput(so, sopt);
 558                         break;
 559                 default:
 560                         error = ip6_ctloutput(so, sopt);
 561                         break;
 562                 }
 563                 break;
 564         }
 565 out:
 566         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 567 }
 568
 569 static void
 570 rip6_attach(netmsg_t msg)
 571 {
 572         struct socket *so = msg->attach.base.nm_so;
 573         int proto = msg->attach.nm_proto;
 574         struct pru_attach_info *ai = msg->attach.nm_ai;
 575         struct inpcb *inp;
 576         int error;
 577
 578         inp = so->so_pcb;
 579         if (inp)
 580                 panic("rip6_attach");
 581         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 582         if (error)
 583                 goto out;
 584
 585         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 586         if (error)
 587                 goto out;
 588         crit_enter();
 589         error = in_pcballoc(so, &ripcbinfo);
 590         crit_exit();
 591         if (error)
 592                 goto out;
 593         inp = (struct inpcb *)so->so_pcb;
 594         inp->inp_vflag |= INP_IPV6;
 595         inp->in6p_ip6_nxt = (long)proto;
 596         inp->in6p_hops = -1;    /* use kernel default */
 597         inp->in6p_cksum = -1;
 598         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
 599                                       M_NOWAIT);
 600         if (inp->in6p_icmp6filt != NULL)
 601                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 602         error = 0;
 603 out:
 604         lwkt_replymsg(&msg->attach.base.lmsg, error);
 605 }
 606
 607 static void
 608 rip6_detach(netmsg_t msg)
 609 {
 610         struct socket *so = msg->detach.base.nm_so;
 611         struct inpcb *inp;
 612
 613         inp = so->so_pcb;
 614         if (inp == NULL)
 615                 panic("rip6_detach");
 616         /* xxx: RSVP */
 617         if (so == ip6_mrouter)
 618                 ip6_mrouter_done();
 619         if (inp->in6p_icmp6filt) {
 620                 kfree(inp->in6p_icmp6filt, M_PCB);
 621                 inp->in6p_icmp6filt = NULL;
 622         }
 623         in6_pcbdetach(inp);
 624         lwkt_replymsg(&msg->detach.base.lmsg, 0);
 625 }
 626
 627 /*
 628  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 629  *       will sofree() it when we return.
 630  */
 631 static void
 632 rip6_abort(netmsg_t msg)
 633 {
 634         soisdisconnected(msg->abort.base.nm_so);
 635         rip6_detach(msg);
 636         /* msg invalid now */
 637 }
 638
 639 static void
 640 rip6_disconnect(netmsg_t msg)
 641 {
 642         struct socket *so = msg->disconnect.base.nm_so;
 643         struct inpcb *inp = so->so_pcb;
 644
 645         if (so->so_state & SS_ISCONNECTED) {
 646                 inp->in6p_faddr = kin6addr_any;
 647                 soreference(so);
 648                 rip6_abort(msg);
 649                 /* msg invalid now */
 650                 sofree(so);
 651                 return;
 652         }
 653         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
 654 }
 655
 656 static void
 657 rip6_bind(netmsg_t msg)
 658 {
 659         struct socket *so = msg->bind.base.nm_so;
 660         struct sockaddr *nam = msg->bind.nm_nam;
 661         struct inpcb *inp = so->so_pcb;
 662         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 663         struct ifaddr *ia = NULL;
 664         int error;
 665
 666         if (nam->sa_len != sizeof(*addr)) {
 667                 error = EINVAL;
 668                 goto out;
 669         }
 670
 671         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
 672                 error = EADDRNOTAVAIL;
 673                 goto out;
 674         }
 675 #ifdef ENABLE_DEFAULT_SCOPE
 676         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 677                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 678         }
 679 #endif
 680         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 681             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
 682                 error = EADDRNOTAVAIL;
 683                 goto out;
 684         }
 685         if (ia &&
 686             ((struct in6_ifaddr *)ia)->ia6_flags &
 687             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 688              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 689                 error = EADDRNOTAVAIL;
 690                 goto out;
 691         }
 692         inp->in6p_laddr = addr->sin6_addr;
 693         error = 0;
 694 out:
 695         lwkt_replymsg(&msg->bind.base.lmsg, error);
 696 }
 697
 698 static void
 699 rip6_connect(netmsg_t msg)
 700 {
 701         struct socket *so = msg->connect.base.nm_so;
 702         struct sockaddr *nam = msg->connect.nm_nam;
 703         struct inpcb *inp = so->so_pcb;
 704         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 705         struct in6_addr *in6a = NULL;
 706         int error = 0;
 707 #ifdef ENABLE_DEFAULT_SCOPE
 708         struct sockaddr_in6 tmp;
 709 #endif
 710
 711         if (nam->sa_len != sizeof(*addr)) {
 712                 error = EINVAL;
 713                 goto out;
 714         }
 715         if (TAILQ_EMPTY(&ifnet)) {
 716                 error = EADDRNOTAVAIL;
 717                 goto out;
 718         }
 719         if (addr->sin6_family != AF_INET6) {
 720                 error = EAFNOSUPPORT;
 721                 goto out;
 722         }
 723 #ifdef ENABLE_DEFAULT_SCOPE
 724         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 725                 /* avoid overwrites */
 726                 tmp = *addr;
 727                 addr = &tmp;
 728                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 729         }
 730 #endif
 731         /* Source address selection. XXX: need pcblookup? */
 732         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 733                              inp->in6p_moptions, &inp->in6p_route,
 734                              &inp->in6p_laddr, &error, NULL);
 735         if (in6a == NULL) {
 736                 if (error == 0)
 737                         error = EADDRNOTAVAIL;
 738         } else {
 739                 inp->in6p_laddr = *in6a;
 740                 inp->in6p_faddr = addr->sin6_addr;
 741                 soisconnected(so);
 742                 error = 0;
 743         }
 744 out:
 745         lwkt_replymsg(&msg->connect.base.lmsg, error);
 746 }
 747
 748 static void
 749 rip6_shutdown(netmsg_t msg)
 750 {
 751         socantsendmore(msg->shutdown.base.nm_so);
 752         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
 753 }
 754
 755 static void
 756 rip6_send(netmsg_t msg)
 757 {
 758         struct socket *so = msg->send.base.nm_so;
 759         struct mbuf *m = msg->send.nm_m;
 760         struct sockaddr *nam = msg->send.nm_addr;
 761         struct mbuf *control = msg->send.nm_control;
 762         struct inpcb *inp = so->so_pcb;
 763         struct sockaddr_in6 tmp;
 764         struct sockaddr_in6 *dst;
 765         int error;
 766
 767         /* always copy sockaddr to avoid overwrites */
 768         if (so->so_state & SS_ISCONNECTED) {
 769                 if (nam) {
 770                         m_freem(m);
 771                         error = EISCONN;
 772                         goto out;
 773                 }
 774                 /* XXX */
 775                 bzero(&tmp, sizeof(tmp));
 776                 tmp.sin6_family = AF_INET6;
 777                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 778                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 779                       sizeof(struct in6_addr));
 780                 dst = &tmp;
 781         } else {
 782                 if (nam == NULL) {
 783                         m_freem(m);
 784                         error = ENOTCONN;
 785                         goto out;
 786                 }
 787                 tmp = *(struct sockaddr_in6 *)nam;
 788                 dst = &tmp;
 789         }
 790 #ifdef ENABLE_DEFAULT_SCOPE
 791         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 792                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 793         }
 794 #endif
 795         error = rip6_output(m, so, dst, control);
 796 out:
 797         lwkt_replymsg(&msg->send.base.lmsg, error);
 798 }
 799
 800 struct pr_usrreqs rip6_usrreqs = {
 801         .pru_abort = rip6_abort,
 802         .pru_accept = pr_generic_notsupp,
 803         .pru_attach = rip6_attach,
 804         .pru_bind = rip6_bind,
 805         .pru_connect = rip6_connect,
 806         .pru_connect2 = pr_generic_notsupp,
 807         .pru_control = in6_control_dispatch,
 808         .pru_detach = rip6_detach,
 809         .pru_disconnect = rip6_disconnect,
 810         .pru_listen = pr_generic_notsupp,
 811         .pru_peeraddr = in6_setpeeraddr_dispatch,
 812         .pru_rcvd = pr_generic_notsupp,
 813         .pru_rcvoob = pr_generic_notsupp,
 814         .pru_send = rip6_send,
 815         .pru_sense = pru_sense_null,
 816         .pru_shutdown = rip6_shutdown,
 817         .pru_sockaddr = in6_setsockaddr_dispatch,
 818         .pru_sosend = sosend,
 819         .pru_soreceive = soreceive
 820 };