sys/netinet6/raw_ip6.c

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.7 2003/01/24 05:11:35 sam Exp $
  30  */
  31
  32 /*
  33  * Copyright (c) 1982, 1986, 1988, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
  65  */
  66
  67 #include "opt_ipsec.h"
  68 #include "opt_inet6.h"
  69
  70 #include <sys/param.h>
  71 #include <sys/malloc.h>
  72 #include <sys/proc.h>
  73 #include <sys/priv.h>
  74 #include <sys/mbuf.h>
  75 #include <sys/socket.h>
  76 #include <sys/jail.h>
  77 #include <sys/protosw.h>
  78 #include <sys/socketvar.h>
  79 #include <sys/errno.h>
  80 #include <sys/systm.h>
  81
  82 #include <sys/thread2.h>
  83 #include <sys/socketvar2.h>
  84 #include <sys/msgport2.h>
  85
  86 #include <net/if.h>
  87 #include <net/route.h>
  88 #include <net/if_types.h>
  89
  90 #include <netinet/in.h>
  91 #include <netinet/in_var.h>
  92 #include <netinet/in_systm.h>
  93 #include <netinet/ip6.h>
  94 #include <netinet6/ip6_var.h>
  95 #include <netinet6/ip6_mroute.h>
  96 #include <netinet/icmp6.h>
  97 #include <netinet/in_pcb.h>
  98 #include <netinet6/in6_pcb.h>
  99 #include <netinet6/nd6.h>
 100 #include <netinet6/ip6protosw.h>
 101 #ifdef ENABLE_DEFAULT_SCOPE
 102 #include <netinet6/scope6_var.h>
 103 #endif
 104 #include <netinet6/raw_ip6.h>
 105
 106 #ifdef IPSEC
 107 #include <netinet6/ipsec.h>
 108 #include <netinet6/ipsec6.h>
 109 #endif /*IPSEC*/
 110
 111 #ifdef FAST_IPSEC
 112 #include <netproto/ipsec/ipsec.h>
 113 #include <netproto/ipsec/ipsec6.h>
 114 #endif /* FAST_IPSEC */
 115
 116 #include <machine/stdarg.h>
 117
 118 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 119 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 120
 121 /*
 122  * Raw interface to IP6 protocol.
 123  */
 124
 125 extern struct   inpcbinfo ripcbinfo;
 126 extern u_long   rip_sendspace;
 127 extern u_long   rip_recvspace;
 128
 129 struct rip6stat rip6stat;
 130
 131 /*
 132  * Setup generic address and protocol structures
 133  * for raw_input routine, then pass them along with
 134  * mbuf chain.
 135  */
 136 int
 137 rip6_input(struct mbuf **mp, int *offp, int proto)
 138 {
 139         struct mbuf *m = *mp;
 140         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 141         struct inpcb *in6p;
 142         struct inpcb *last = NULL;
 143         struct mbuf *opts = NULL;
 144         struct sockaddr_in6 rip6src;
 145
 146         rip6stat.rip6s_ipackets++;
 147
 148         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
 149                 /* XXX send icmp6 host/port unreach? */
 150                 m_freem(m);
 151                 return IPPROTO_DONE;
 152         }
 153
 154         init_sin6(&rip6src, m); /* general init */
 155
 156         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 157                 if (in6p->in6p_flags & INP_PLACEMARKER)
 158                         continue;
 159                 if (!(in6p->in6p_vflag & INP_IPV6))
 160                         continue;
 161                 if (in6p->in6p_ip6_nxt &&
 162                     in6p->in6p_ip6_nxt != proto)
 163                         continue;
 164                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 165                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 166                         continue;
 167                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 168                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 169                         continue;
 170                 if (in6p->in6p_cksum != -1) {
 171                         rip6stat.rip6s_isum++;
 172                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 173                             m->m_pkthdr.len - *offp)) {
 174                                 rip6stat.rip6s_badsum++;
 175                                 continue;
 176                         }
 177                 }
 178                 if (last) {
 179                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 180
 181 #ifdef IPSEC
 182                         /*
 183                          * Check AH/ESP integrity.
 184                          */
 185                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
 186                                 m_freem(n);
 187                                 ipsec6stat.in_polvio++;
 188                                 /* do not inject data into pcb */
 189                         } else
 190 #endif /*IPSEC*/
 191 #ifdef FAST_IPSEC
 192                         /*
 193                          * Check AH/ESP integrity.
 194                          */
 195                         if (n && ipsec6_in_reject(n, last)) {
 196                                 m_freem(n);
 197                                 /* do not inject data into pcb */
 198                         } else
 199 #endif /*FAST_IPSEC*/
 200                         if (n) {
 201                                 struct socket *so;
 202
 203                                 so = last->in6p_socket;
 204                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 205                                     (so->so_options & SO_TIMESTAMP)) {
 206                                         ip6_savecontrol(last, &opts, ip6, n);
 207                                 }
 208                                 /* strip intermediate headers */
 209                                 m_adj(n, *offp);
 210                                 lwkt_gettoken(&so->so_rcv.ssb_token);
 211                                 if (ssb_appendaddr(&so->so_rcv,
 212                                                 (struct sockaddr *)&rip6src,
 213                                                  n, opts) == 0) {
 214                                         m_freem(n);
 215                                         if (opts)
 216                                                 m_freem(opts);
 217                                         rip6stat.rip6s_fullsock++;
 218                                 } else {
 219                                         sorwakeup(so);
 220                                 }
 221                                 lwkt_reltoken(&so->so_rcv.ssb_token);
 222                                 opts = NULL;
 223                         }
 224                 }
 225                 last = in6p;
 226         }
 227 #ifdef IPSEC
 228         /*
 229          * Check AH/ESP integrity.
 230          */
 231         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
 232                 m_freem(m);
 233                 ipsec6stat.in_polvio++;
 234                 ip6stat.ip6s_delivered--;
 235                 /* do not inject data into pcb */
 236         } else
 237 #endif /*IPSEC*/
 238 #ifdef FAST_IPSEC
 239         /*
 240          * Check AH/ESP integrity.
 241          */
 242         if (last && ipsec6_in_reject(m, last)) {
 243                 m_freem(m);
 244                 ip6stat.ip6s_delivered--;
 245                 /* do not inject data into pcb */
 246         } else
 247 #endif /*FAST_IPSEC*/
 248         if (last) {
 249                 struct socket *so;
 250
 251                 so = last->in6p_socket;
 252                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 253                     (so->so_options & SO_TIMESTAMP)) {
 254                         ip6_savecontrol(last, &opts, ip6, m);
 255                 }
 256                 /* strip intermediate headers */
 257                 m_adj(m, *offp);
 258                 lwkt_gettoken(&so->so_rcv.ssb_token);
 259                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
 260                                    m, opts) == 0) {
 261                         m_freem(m);
 262                         if (opts)
 263                                 m_freem(opts);
 264                         rip6stat.rip6s_fullsock++;
 265                 } else {
 266                         sorwakeup(so);
 267                 }
 268                 lwkt_reltoken(&so->so_rcv.ssb_token);
 269         } else {
 270                 rip6stat.rip6s_nosock++;
 271                 if (m->m_flags & M_MCAST)
 272                         rip6stat.rip6s_nosockmcast++;
 273                 if (proto == IPPROTO_NONE)
 274                         m_freem(m);
 275                 else {
 276                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 277                         icmp6_error(m, ICMP6_PARAM_PROB,
 278                                     ICMP6_PARAMPROB_NEXTHEADER,
 279                                     prvnxtp - mtod(m, char *));
 280                 }
 281                 ip6stat.ip6s_delivered--;
 282         }
 283         return IPPROTO_DONE;
 284 }
 285
 286 void
 287 rip6_ctlinput(netmsg_t msg)
 288 {
 289         int cmd = msg->ctlinput.nm_cmd;
 290         struct sockaddr *sa = msg->ctlinput.nm_arg;
 291         void *d = msg->ctlinput.nm_extra;
 292         struct ip6ctlparam *ip6cp = NULL;
 293         const struct sockaddr_in6 *sa6_src = NULL;
 294         void (*notify) (struct inpcb *, int) = in6_rtchange;
 295
 296         if (sa->sa_family != AF_INET6 ||
 297             sa->sa_len != sizeof(struct sockaddr_in6))
 298                 goto out;
 299
 300         if ((unsigned)cmd >= PRC_NCMDS)
 301                 goto out;
 302         if (PRC_IS_REDIRECT(cmd))
 303                 notify = in6_rtchange, d = NULL;
 304         else if (cmd == PRC_HOSTDEAD)
 305                 d = NULL;
 306         else if (inet6ctlerrmap[cmd] == 0)
 307                 goto out;
 308
 309         /* if the parameter is from icmp6, decode it. */
 310         if (d != NULL) {
 311                 ip6cp = (struct ip6ctlparam *)d;
 312                 sa6_src = ip6cp->ip6c_src;
 313         } else {
 314                 sa6_src = &sa6_any;
 315         }
 316
 317         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
 318                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 319 out:
 320         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 321 }
 322
 323 /*
 324  * Generate IPv6 header and pass packet to ip6_output.
 325  * Tack on options user may have setup with control call.
 326  */
 327 int
 328 rip6_output(struct mbuf *m, struct socket *so, ...)
 329 {
 330         struct sockaddr_in6 *dstsock;
 331         struct mbuf *control;
 332         struct in6_addr *dst;
 333         struct ip6_hdr *ip6;
 334         struct inpcb *in6p;
 335         u_int   plen = m->m_pkthdr.len;
 336         int error = 0;
 337         struct ip6_pktopts opt, *optp = NULL;
 338         struct ifnet *oifp = NULL;
 339         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 340         int priv = 0;
 341         __va_list ap;
 342
 343         __va_start(ap, so);
 344         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 345         control = __va_arg(ap, struct mbuf *);
 346         __va_end(ap);
 347
 348         in6p = so->so_pcb;
 349
 350         priv = 0;
 351         if (so->so_cred->cr_uid == 0)
 352                 priv = 1;
 353         dst = &dstsock->sin6_addr;
 354         if (control) {
 355                 if ((error = ip6_setpktoptions(control, &opt,
 356                     in6p->in6p_outputopts,
 357                     so->so_proto->pr_protocol, priv)) != 0)
 358                         goto bad;
 359                 optp = &opt;
 360         } else
 361                 optp = in6p->in6p_outputopts;
 362
 363         /*
 364          * For an ICMPv6 packet, we should know its type and code
 365          * to update statistics.
 366          */
 367         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 368                 struct icmp6_hdr *icmp6;
 369                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 370                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 371                         error = ENOBUFS;
 372                         goto bad;
 373                 }
 374                 icmp6 = mtod(m, struct icmp6_hdr *);
 375                 type = icmp6->icmp6_type;
 376                 code = icmp6->icmp6_code;
 377         }
 378
 379         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
 380         ip6 = mtod(m, struct ip6_hdr *);
 381
 382         /*
 383          * Next header might not be ICMP6 but use its pseudo header anyway.
 384          */
 385         ip6->ip6_dst = *dst;
 386
 387         /*
 388          * If the scope of the destination is link-local, embed the interface
 389          * index in the address.
 390          *
 391          * XXX advanced-api value overrides sin6_scope_id
 392          */
 393         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 394                 struct in6_pktinfo *pi;
 395
 396                 /*
 397                  * XXX Boundary check is assumed to be already done in
 398                  * ip6_setpktoptions().
 399                  */
 400                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 401                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 402                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 403                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 404                          in6p->in6p_moptions &&
 405                          in6p->in6p_moptions->im6o_multicast_ifp) {
 406                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 407                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 408                 } else if (dstsock->sin6_scope_id) {
 409                         /* boundary check */
 410                         if (dstsock->sin6_scope_id < 0
 411                          || if_index < dstsock->sin6_scope_id) {
 412                                 error = ENXIO;  /* XXX EINVAL? */
 413                                 goto bad;
 414                         }
 415                         ip6->ip6_dst.s6_addr16[1]
 416                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 417                 }
 418         }
 419
 420         /*
 421          * Source address selection.
 422          */
 423         {
 424                 struct in6_addr *in6a;
 425
 426                 if ((in6a = in6_selectsrc(dstsock, optp,
 427                                           in6p->in6p_moptions,
 428                                           &in6p->in6p_route,
 429                                           &in6p->in6p_laddr,
 430                                           &error, NULL)) == NULL) {
 431                         if (error == 0)
 432                                 error = EADDRNOTAVAIL;
 433                         goto bad;
 434                 }
 435                 ip6->ip6_src = *in6a;
 436                 if (in6p->in6p_route.ro_rt)
 437                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 438         }
 439         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 440                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 441         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 442                 (IPV6_VERSION & IPV6_VERSION_MASK);
 443         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 444         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 445         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 446
 447         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 448             in6p->in6p_cksum != -1) {
 449                 struct mbuf *n;
 450                 int off;
 451                 u_int16_t *p;
 452
 453                 /* compute checksum */
 454                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 455                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 456                 else
 457                         off = in6p->in6p_cksum;
 458                 if (plen < off + 1) {
 459                         error = EINVAL;
 460                         goto bad;
 461                 }
 462                 off += sizeof(struct ip6_hdr);
 463
 464                 n = m;
 465                 while (n && n->m_len <= off) {
 466                         off -= n->m_len;
 467                         n = n->m_next;
 468                 }
 469                 if (!n)
 470                         goto bad;
 471                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 472                 *p = 0;
 473                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 474         }
 475
 476         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 477                            in6p->in6p_moptions, &oifp, in6p);
 478         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 479                 if (oifp)
 480                         icmp6_ifoutstat_inc(oifp, type, code);
 481                 icmp6stat.icp6s_outhist[type]++;
 482         } else
 483                 rip6stat.rip6s_opackets++;
 484
 485         goto freectl;
 486
 487 bad:
 488         if (m)
 489                 m_freem(m);
 490
 491 freectl:
 492         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 493                 RTFREE(optp->ip6po_route.ro_rt);
 494         if (control) {
 495                 if (optp == &opt)
 496                         ip6_clearpktopts(optp, -1);
 497                 m_freem(control);
 498         }
 499         return (error);
 500 }
 501
 502 /*
 503  * Raw IPv6 socket option processing.
 504  */
 505 void
 506 rip6_ctloutput(netmsg_t msg)
 507 {
 508         struct socket *so = msg->ctloutput.base.nm_so;
 509         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 510         int error;
 511
 512         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 513                 /*
 514                  * XXX: is it better to call icmp6_ctloutput() directly
 515                  * from protosw?
 516                  */
 517                 icmp6_ctloutput(msg);
 518                 /* msg invalid now */
 519                 return;
 520         }
 521         if (sopt->sopt_level != IPPROTO_IPV6) {
 522                 error = EINVAL;
 523                 goto out;
 524         }
 525
 526         error = 0;
 527
 528         switch (sopt->sopt_dir) {
 529         case SOPT_GET:
 530                 switch (sopt->sopt_name) {
 531                 case MRT6_INIT:
 532                 case MRT6_DONE:
 533                 case MRT6_ADD_MIF:
 534                 case MRT6_DEL_MIF:
 535                 case MRT6_ADD_MFC:
 536                 case MRT6_DEL_MFC:
 537                 case MRT6_PIM:
 538                         error = ip6_mrouter_get(so, sopt);
 539                         break;
 540                 case IPV6_CHECKSUM:
 541                         error = ip6_raw_ctloutput(so, sopt);
 542                         break;
 543                 default:
 544                         error = ip6_ctloutput(so, sopt);
 545                         break;
 546                 }
 547                 break;
 548
 549         case SOPT_SET:
 550                 switch (sopt->sopt_name) {
 551                 case MRT6_INIT:
 552                 case MRT6_DONE:
 553                 case MRT6_ADD_MIF:
 554                 case MRT6_DEL_MIF:
 555                 case MRT6_ADD_MFC:
 556                 case MRT6_DEL_MFC:
 557                 case MRT6_PIM:
 558                         error = ip6_mrouter_set(so, sopt);
 559                         break;
 560                 case IPV6_CHECKSUM:
 561                         error = ip6_raw_ctloutput(so, sopt);
 562                         break;
 563                 default:
 564                         error = ip6_ctloutput(so, sopt);
 565                         break;
 566                 }
 567                 break;
 568         }
 569 out:
 570         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 571 }
 572
 573 static void
 574 rip6_attach(netmsg_t msg)
 575 {
 576         struct socket *so = msg->attach.base.nm_so;
 577         int proto = msg->attach.nm_proto;
 578         struct pru_attach_info *ai = msg->attach.nm_ai;
 579         struct inpcb *inp;
 580         int error;
 581
 582         inp = so->so_pcb;
 583         if (inp)
 584                 panic("rip6_attach");
 585         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
 586         if (error)
 587                 goto out;
 588
 589         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 590         if (error)
 591                 goto out;
 592         crit_enter();
 593         error = in_pcballoc(so, &ripcbinfo);
 594         crit_exit();
 595         if (error)
 596                 goto out;
 597         inp = (struct inpcb *)so->so_pcb;
 598         inp->inp_vflag |= INP_IPV6;
 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 #ifdef ENABLE_DEFAULT_SCOPE
 680         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 681                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 682         }
 683 #endif
 684         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 685             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
 686                 error = EADDRNOTAVAIL;
 687                 goto out;
 688         }
 689         if (ia &&
 690             ((struct in6_ifaddr *)ia)->ia6_flags &
 691             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 692              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 693                 error = EADDRNOTAVAIL;
 694                 goto out;
 695         }
 696         inp->in6p_laddr = addr->sin6_addr;
 697         error = 0;
 698 out:
 699         lwkt_replymsg(&msg->bind.base.lmsg, error);
 700 }
 701
 702 static void
 703 rip6_connect(netmsg_t msg)
 704 {
 705         struct socket *so = msg->connect.base.nm_so;
 706         struct sockaddr *nam = msg->connect.nm_nam;
 707         struct inpcb *inp = so->so_pcb;
 708         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 709         struct in6_addr *in6a = NULL;
 710         int error = 0;
 711 #ifdef ENABLE_DEFAULT_SCOPE
 712         struct sockaddr_in6 tmp;
 713 #endif
 714
 715         if (nam->sa_len != sizeof(*addr)) {
 716                 error = EINVAL;
 717                 goto out;
 718         }
 719         if (TAILQ_EMPTY(&ifnet)) {
 720                 error = EADDRNOTAVAIL;
 721                 goto out;
 722         }
 723         if (addr->sin6_family != AF_INET6) {
 724                 error = EAFNOSUPPORT;
 725                 goto out;
 726         }
 727 #ifdef ENABLE_DEFAULT_SCOPE
 728         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 729                 /* avoid overwrites */
 730                 tmp = *addr;
 731                 addr = &tmp;
 732                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 733         }
 734 #endif
 735         /* Source address selection. XXX: need pcblookup? */
 736         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 737                              inp->in6p_moptions, &inp->in6p_route,
 738                              &inp->in6p_laddr, &error, NULL);
 739         if (in6a == NULL) {
 740                 if (error == 0)
 741                         error = EADDRNOTAVAIL;
 742         } else {
 743                 inp->in6p_laddr = *in6a;
 744                 inp->in6p_faddr = addr->sin6_addr;
 745                 soisconnected(so);
 746                 error = 0;
 747         }
 748 out:
 749         lwkt_replymsg(&msg->connect.base.lmsg, error);
 750 }
 751
 752 static void
 753 rip6_shutdown(netmsg_t msg)
 754 {
 755         socantsendmore(msg->shutdown.base.nm_so);
 756         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
 757 }
 758
 759 static void
 760 rip6_send(netmsg_t msg)
 761 {
 762         struct socket *so = msg->send.base.nm_so;
 763         struct mbuf *m = msg->send.nm_m;
 764         struct sockaddr *nam = msg->send.nm_addr;
 765         struct mbuf *control = msg->send.nm_control;
 766         struct inpcb *inp = so->so_pcb;
 767         struct sockaddr_in6 tmp;
 768         struct sockaddr_in6 *dst;
 769         int error;
 770
 771         /* always copy sockaddr to avoid overwrites */
 772         if (so->so_state & SS_ISCONNECTED) {
 773                 if (nam) {
 774                         m_freem(m);
 775                         error = EISCONN;
 776                         goto out;
 777                 }
 778                 /* XXX */
 779                 bzero(&tmp, sizeof(tmp));
 780                 tmp.sin6_family = AF_INET6;
 781                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 782                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 783                       sizeof(struct in6_addr));
 784                 dst = &tmp;
 785         } else {
 786                 if (nam == NULL) {
 787                         m_freem(m);
 788                         error = ENOTCONN;
 789                         goto out;
 790                 }
 791                 tmp = *(struct sockaddr_in6 *)nam;
 792                 dst = &tmp;
 793         }
 794 #ifdef ENABLE_DEFAULT_SCOPE
 795         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 796                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 797         }
 798 #endif
 799         error = rip6_output(m, so, dst, control);
 800 out:
 801         lwkt_replymsg(&msg->send.base.lmsg, error);
 802 }
 803
 804 struct pr_usrreqs rip6_usrreqs = {
 805         .pru_abort = rip6_abort,
 806         .pru_accept = pr_generic_notsupp,
 807         .pru_attach = rip6_attach,
 808         .pru_bind = rip6_bind,
 809         .pru_connect = rip6_connect,
 810         .pru_connect2 = pr_generic_notsupp,
 811         .pru_control = in6_control_dispatch,
 812         .pru_detach = rip6_detach,
 813         .pru_disconnect = rip6_disconnect,
 814         .pru_listen = pr_generic_notsupp,
 815         .pru_peeraddr = in6_setpeeraddr_dispatch,
 816         .pru_rcvd = pr_generic_notsupp,
 817         .pru_rcvoob = pr_generic_notsupp,
 818         .pru_send = rip6_send,
 819         .pru_sense = pru_sense_null,
 820         .pru_shutdown = rip6_shutdown,
 821         .pru_sockaddr = in6_setsockaddr_dispatch,
 822         .pru_sosend = sosend,
 823         .pru_soreceive = soreceive
 824 };