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         init_sin6(&rip6src, m); /* general init */
 145
 146         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 147                 if (in6p->in6p_flags & INP_PLACEMARKER)
 148                         continue;
 149                 if (!INP_ISIPV6(in6p))
 150                         continue;
 151                 if (in6p->in6p_ip6_nxt &&
 152                     in6p->in6p_ip6_nxt != proto)
 153                         continue;
 154                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 155                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 156                         continue;
 157                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 158                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 159                         continue;
 160                 if (in6p->in6p_cksum != -1) {
 161                         rip6stat.rip6s_isum++;
 162                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 163                             m->m_pkthdr.len - *offp)) {
 164                                 rip6stat.rip6s_badsum++;
 165                                 continue;
 166                         }
 167                 }
 168                 if (last) {
 169                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 170
 171 #ifdef IPSEC
 172                         /*
 173                          * Check AH/ESP integrity.
 174                          */
 175                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 176                                 m_freem(n);
 177                                 ipsec6stat.in_polvio++;
 178                                 /* do not inject data into pcb */
 179                         } else
 180 #endif /*IPSEC*/
 181 #ifdef FAST_IPSEC
 182                         /*
 183                          * Check AH/ESP integrity.
 184                          */
 185                         if (n && ipsec6_in_reject(n, last)) {
 186                                 m_freem(n);
 187                                 /* do not inject data into pcb */
 188                         } else
 189 #endif /*FAST_IPSEC*/
 190                         if (n) {
 191                                 struct socket *so;
 192
 193                                 so = last->in6p_socket;
 194                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 195                                     (so->so_options & SO_TIMESTAMP)) {
 196                                         ip6_savecontrol(last, &opts, ip6, n);
 197                                 }
 198                                 /* strip intermediate headers */
 199                                 m_adj(n, *offp);
 200                                 lwkt_gettoken(&so->so_rcv.ssb_token);
 201                                 if (ssb_appendaddr(&so->so_rcv,
 202                                                 (struct sockaddr *)&rip6src,
 203                                                  n, opts) == 0) {
 204                                         m_freem(n);
 205                                         if (opts)
 206                                                 m_freem(opts);
 207                                         rip6stat.rip6s_fullsock++;
 208                                 } else {
 209                                         sorwakeup(so);
 210                                 }
 211                                 lwkt_reltoken(&so->so_rcv.ssb_token);
 212                                 opts = NULL;
 213                         }
 214                 }
 215                 last = in6p;
 216         }
 217 #ifdef IPSEC
 218         /*
 219          * Check AH/ESP integrity.
 220          */
 221         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 222                 m_freem(m);
 223                 ipsec6stat.in_polvio++;
 224                 ip6stat.ip6s_delivered--;
 225                 /* do not inject data into pcb */
 226         } else
 227 #endif /*IPSEC*/
 228 #ifdef FAST_IPSEC
 229         /*
 230          * Check AH/ESP integrity.
 231          */
 232         if (last && ipsec6_in_reject(m, last)) {
 233                 m_freem(m);
 234                 ip6stat.ip6s_delivered--;
 235                 /* do not inject data into pcb */
 236         } else
 237 #endif /*FAST_IPSEC*/
 238         if (last) {
 239                 struct socket *so;
 240
 241                 so = last->in6p_socket;
 242                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 243                     (so->so_options & SO_TIMESTAMP)) {
 244                         ip6_savecontrol(last, &opts, ip6, m);
 245                 }
 246                 /* strip intermediate headers */
 247                 m_adj(m, *offp);
 248                 lwkt_gettoken(&so->so_rcv.ssb_token);
 249                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
 250                                    m, opts) == 0) {
 251                         m_freem(m);
 252                         if (opts)
 253                                 m_freem(opts);
 254                         rip6stat.rip6s_fullsock++;
 255                 } else {
 256                         sorwakeup(so);
 257                 }
 258                 lwkt_reltoken(&so->so_rcv.ssb_token);
 259         } else {
 260                 rip6stat.rip6s_nosock++;
 261                 if (m->m_flags & M_MCAST)
 262                         rip6stat.rip6s_nosockmcast++;
 263                 if (proto == IPPROTO_NONE)
 264                         m_freem(m);
 265                 else {
 266                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 267                         icmp6_error(m, ICMP6_PARAM_PROB,
 268                                     ICMP6_PARAMPROB_NEXTHEADER,
 269                                     prvnxtp - mtod(m, char *));
 270                 }
 271                 ip6stat.ip6s_delivered--;
 272         }
 273         return IPPROTO_DONE;
 274 }
 275
 276 void
 277 rip6_ctlinput(netmsg_t msg)
 278 {
 279         int cmd = msg->ctlinput.nm_cmd;
 280         struct sockaddr *sa = msg->ctlinput.nm_arg;
 281         void *d = msg->ctlinput.nm_extra;
 282         struct ip6ctlparam *ip6cp = NULL;
 283         const struct sockaddr_in6 *sa6_src = NULL;
 284         inp_notify_t notify = 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                 sa6_src = ip6cp->ip6c_src;
 303         } else {
 304                 sa6_src = &sa6_any;
 305         }
 306
 307         in6_pcbnotify(&ripcbinfo, sa, 0,
 308                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 309 out:
 310         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 311 }
 312
 313 /*
 314  * Generate IPv6 header and pass packet to ip6_output.
 315  * Tack on options user may have setup with control call.
 316  */
 317 int
 318 rip6_output(struct mbuf *m, struct socket *so, ...)
 319 {
 320         struct sockaddr_in6 *dstsock;
 321         struct mbuf *control;
 322         struct in6_addr *dst;
 323         struct ip6_hdr *ip6;
 324         struct inpcb *in6p;
 325         u_int   plen = m->m_pkthdr.len;
 326         int error = 0;
 327         struct ip6_pktopts opt, *optp = NULL;
 328         struct ifnet *oifp = NULL;
 329         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 330         int priv = 0;
 331         __va_list ap;
 332
 333         __va_start(ap, so);
 334         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 335         control = __va_arg(ap, struct mbuf *);
 336         __va_end(ap);
 337
 338         if (IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
 339                 error = EADDRNOTAVAIL;
 340                 goto bad;
 341         }
 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), M_WAITOK);
 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, in6p->in6p_moptions,
 422                     &in6p->in6p_route, &in6p->in6p_laddr, &error, NULL))
 423                     == NULL) {
 424                         if (error == 0)
 425                                 error = EADDRNOTAVAIL;
 426                         goto bad;
 427                 }
 428                 ip6->ip6_src = *in6a;
 429                 if (in6p->in6p_route.ro_rt)
 430                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 431         }
 432         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 433                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 434         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 435                 (IPV6_VERSION & IPV6_VERSION_MASK);
 436         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 437         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 438         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 439
 440         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 441             in6p->in6p_cksum != -1) {
 442                 struct mbuf *n;
 443                 int off;
 444                 u_int16_t *p;
 445
 446                 /* compute checksum */
 447                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 448                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 449                 else
 450                         off = in6p->in6p_cksum;
 451                 if (plen < off + 1) {
 452                         error = EINVAL;
 453                         goto bad;
 454                 }
 455                 off += sizeof(struct ip6_hdr);
 456
 457                 n = m;
 458                 while (n && n->m_len <= off) {
 459                         off -= n->m_len;
 460                         n = n->m_next;
 461                 }
 462                 if (!n)
 463                         goto bad;
 464                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 465                 *p = 0;
 466                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 467         }
 468
 469         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 470                            in6p->in6p_moptions, &oifp, in6p);
 471         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 472                 if (oifp)
 473                         icmp6_ifoutstat_inc(oifp, type, code);
 474                 icmp6stat.icp6s_outhist[type]++;
 475         } else
 476                 rip6stat.rip6s_opackets++;
 477
 478         goto freectl;
 479
 480 bad:
 481         if (m)
 482                 m_freem(m);
 483
 484 freectl:
 485         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 486                 RTFREE(optp->ip6po_route.ro_rt);
 487         if (control) {
 488                 if (optp == &opt)
 489                         ip6_clearpktopts(optp, -1);
 490                 m_freem(control);
 491         }
 492         return (error);
 493 }
 494
 495 /*
 496  * Raw IPv6 socket option processing.
 497  */
 498 void
 499 rip6_ctloutput(netmsg_t msg)
 500 {
 501         struct socket *so = msg->ctloutput.base.nm_so;
 502         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 503         int error;
 504
 505         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 506                 /*
 507                  * XXX: is it better to call icmp6_ctloutput() directly
 508                  * from protosw?
 509                  */
 510                 icmp6_ctloutput(msg);
 511                 /* msg invalid now */
 512                 return;
 513         }
 514         if (sopt->sopt_level != IPPROTO_IPV6) {
 515                 error = EINVAL;
 516                 goto out;
 517         }
 518
 519         error = 0;
 520
 521         switch (sopt->sopt_dir) {
 522         case SOPT_GET:
 523                 switch (sopt->sopt_name) {
 524                 case MRT6_INIT:
 525                 case MRT6_DONE:
 526                 case MRT6_ADD_MIF:
 527                 case MRT6_DEL_MIF:
 528                 case MRT6_ADD_MFC:
 529                 case MRT6_DEL_MFC:
 530                 case MRT6_PIM:
 531                         error = ip6_mrouter_get(so, sopt);
 532                         break;
 533                 case IPV6_CHECKSUM:
 534                         error = ip6_raw_ctloutput(so, sopt);
 535                         break;
 536                 default:
 537                         error = ip6_ctloutput(so, sopt);
 538                         break;
 539                 }
 540                 break;
 541
 542         case SOPT_SET:
 543                 switch (sopt->sopt_name) {
 544                 case MRT6_INIT:
 545                 case MRT6_DONE:
 546                 case MRT6_ADD_MIF:
 547                 case MRT6_DEL_MIF:
 548                 case MRT6_ADD_MFC:
 549                 case MRT6_DEL_MFC:
 550                 case MRT6_PIM:
 551                         error = ip6_mrouter_set(so, sopt);
 552                         break;
 553                 case IPV6_CHECKSUM:
 554                         error = ip6_raw_ctloutput(so, sopt);
 555                         break;
 556                 default:
 557                         error = ip6_ctloutput(so, sopt);
 558                         break;
 559                 }
 560                 break;
 561         }
 562 out:
 563         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 564 }
 565
 566 static void
 567 rip6_attach(netmsg_t msg)
 568 {
 569         struct socket *so = msg->attach.base.nm_so;
 570         int proto = msg->attach.nm_proto;
 571         struct pru_attach_info *ai = msg->attach.nm_ai;
 572         struct inpcb *inp;
 573         int error;
 574
 575         inp = so->so_pcb;
 576         if (inp)
 577                 panic("rip6_attach");
 578         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 579         if (error)
 580                 goto out;
 581
 582         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 583         if (error)
 584                 goto out;
 585         crit_enter();
 586         error = in_pcballoc(so, &ripcbinfo);
 587         crit_exit();
 588         if (error)
 589                 goto out;
 590         inp = (struct inpcb *)so->so_pcb;
 591         inp->in6p_ip6_nxt = (long)proto;
 592         inp->in6p_hops = -1;    /* use kernel default */
 593         inp->in6p_cksum = -1;
 594         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
 595                                       M_NOWAIT);
 596         if (inp->in6p_icmp6filt != NULL)
 597                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 598         error = 0;
 599 out:
 600         lwkt_replymsg(&msg->attach.base.lmsg, error);
 601 }
 602
 603 static void
 604 rip6_detach(netmsg_t msg)
 605 {
 606         struct socket *so = msg->detach.base.nm_so;
 607         struct inpcb *inp;
 608
 609         inp = so->so_pcb;
 610         if (inp == NULL)
 611                 panic("rip6_detach");
 612         /* xxx: RSVP */
 613         if (so == ip6_mrouter)
 614                 ip6_mrouter_done();
 615         if (inp->in6p_icmp6filt) {
 616                 kfree(inp->in6p_icmp6filt, M_PCB);
 617                 inp->in6p_icmp6filt = NULL;
 618         }
 619         in6_pcbdetach(inp);
 620         lwkt_replymsg(&msg->detach.base.lmsg, 0);
 621 }
 622
 623 /*
 624  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 625  *       will sofree() it when we return.
 626  */
 627 static void
 628 rip6_abort(netmsg_t msg)
 629 {
 630         soisdisconnected(msg->abort.base.nm_so);
 631         rip6_detach(msg);
 632         /* msg invalid now */
 633 }
 634
 635 static void
 636 rip6_disconnect(netmsg_t msg)
 637 {
 638         struct socket *so = msg->disconnect.base.nm_so;
 639         struct inpcb *inp = so->so_pcb;
 640
 641         if (so->so_state & SS_ISCONNECTED) {
 642                 inp->in6p_faddr = kin6addr_any;
 643                 soreference(so);
 644                 rip6_abort(msg);
 645                 /* msg invalid now */
 646                 sofree(so);
 647                 return;
 648         }
 649         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
 650 }
 651
 652 static void
 653 rip6_bind(netmsg_t msg)
 654 {
 655         struct socket *so = msg->bind.base.nm_so;
 656         struct sockaddr *nam = msg->bind.nm_nam;
 657         struct inpcb *inp = so->so_pcb;
 658         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 659         struct ifaddr *ia = NULL;
 660         int error;
 661
 662         if (nam->sa_len != sizeof(*addr)) {
 663                 error = EINVAL;
 664                 goto out;
 665         }
 666         if (ifnet_array_isempty() || addr->sin6_family != AF_INET6) {
 667                 error = EADDRNOTAVAIL;
 668                 goto out;
 669         }
 670         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
 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 (ifnet_array_isempty()) {
 715                 error = EADDRNOTAVAIL;
 716                 goto out;
 717         }
 718         if (addr->sin6_family != AF_INET6) {
 719                 error = EAFNOSUPPORT;
 720                 goto out;
 721         }
 722         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
 723                 error = EADDRNOTAVAIL;
 724                 goto out;
 725         }
 726 #ifdef ENABLE_DEFAULT_SCOPE
 727         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 728                 /* avoid overwrites */
 729                 tmp = *addr;
 730                 addr = &tmp;
 731                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 732         }
 733 #endif
 734         /* Source address selection. XXX: need pcblookup? */
 735         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 736                              inp->in6p_moptions, &inp->in6p_route,
 737                              &inp->in6p_laddr, &error, NULL);
 738         if (in6a == NULL) {
 739                 if (error == 0)
 740                         error = EADDRNOTAVAIL;
 741         } else {
 742                 inp->in6p_laddr = *in6a;
 743                 inp->in6p_faddr = addr->sin6_addr;
 744                 soisconnected(so);
 745                 error = 0;
 746         }
 747 out:
 748         lwkt_replymsg(&msg->connect.base.lmsg, error);
 749 }
 750
 751 static void
 752 rip6_shutdown(netmsg_t msg)
 753 {
 754         socantsendmore(msg->shutdown.base.nm_so);
 755         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
 756 }
 757
 758 static void
 759 rip6_send(netmsg_t msg)
 760 {
 761         struct socket *so = msg->send.base.nm_so;
 762         struct mbuf *m = msg->send.nm_m;
 763         struct sockaddr *nam = msg->send.nm_addr;
 764         struct mbuf *control = msg->send.nm_control;
 765         struct inpcb *inp = so->so_pcb;
 766         struct sockaddr_in6 tmp;
 767         struct sockaddr_in6 *dst;
 768         int error;
 769
 770         /* always copy sockaddr to avoid overwrites */
 771         if (so->so_state & SS_ISCONNECTED) {
 772                 if (nam) {
 773                         m_freem(m);
 774                         error = EISCONN;
 775                         goto out;
 776                 }
 777                 /* XXX */
 778                 bzero(&tmp, sizeof(tmp));
 779                 tmp.sin6_family = AF_INET6;
 780                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 781                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 782                       sizeof(struct in6_addr));
 783                 dst = &tmp;
 784         } else {
 785                 if (nam == NULL) {
 786                         m_freem(m);
 787                         error = ENOTCONN;
 788                         goto out;
 789                 }
 790                 tmp = *(struct sockaddr_in6 *)nam;
 791                 dst = &tmp;
 792         }
 793 #ifdef ENABLE_DEFAULT_SCOPE
 794         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 795                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 796         }
 797 #endif
 798         error = rip6_output(m, so, dst, control);
 799 out:
 800         lwkt_replymsg(&msg->send.base.lmsg, error);
 801 }
 802
 803 struct pr_usrreqs rip6_usrreqs = {
 804         .pru_abort = rip6_abort,
 805         .pru_accept = pr_generic_notsupp,
 806         .pru_attach = rip6_attach,
 807         .pru_bind = rip6_bind,
 808         .pru_connect = rip6_connect,
 809         .pru_connect2 = pr_generic_notsupp,
 810         .pru_control = in6_control_dispatch,
 811         .pru_detach = rip6_detach,
 812         .pru_disconnect = rip6_disconnect,
 813         .pru_listen = pr_generic_notsupp,
 814         .pru_peeraddr = in6_setpeeraddr_dispatch,
 815         .pru_rcvd = pr_generic_notsupp,
 816         .pru_rcvoob = pr_generic_notsupp,
 817         .pru_send = rip6_send,
 818         .pru_sense = pru_sense_null,
 819         .pru_shutdown = rip6_shutdown,
 820         .pru_sockaddr = in6_setsockaddr_dispatch,
 821         .pru_sosend = sosend,
 822         .pru_soreceive = soreceive
 823 };