bsd/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 1.7.2.4 2001/07/29 19:32:40 ume 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 #include <sys/param.h>
  67 #include <sys/malloc.h>
  68 #include <sys/proc.h>
  69 #include <sys/mbuf.h>
  70 #include <sys/socket.h>
  71 #include <sys/protosw.h>
  72 #include <sys/socketvar.h>
  73 #include <sys/errno.h>
  74 #include <sys/systm.h>
  75
  76 #include <net/if.h>
  77 #include <net/route.h>
  78 #include <net/if_types.h>
  79
  80 #include <netinet/in.h>
  81 #include <netinet/in_var.h>
  82 #include <netinet/in_systm.h>
  83 #include <netinet/ip6.h>
  84 #include <netinet6/ip6_var.h>
  85 #include <netinet6/ip6_mroute.h>
  86 #include <netinet/icmp6.h>
  87 #include <netinet/in_pcb.h>
  88 #include <netinet6/in6_pcb.h>
  89 #include <netinet6/nd6.h>
  90 #include <netinet6/ip6protosw.h>
  91 #if ENABLE_DEFAULT_SCOPE
  92 #include <netinet6/scope6_var.h>
  93 #endif
  94 #include <netinet6/raw_ip6.h>
  95 #include <netinet6/ip6_fw.h>
  96
  97 #if IPSEC
  98 #include <netinet6/ipsec.h>
  99 #include <netinet6/ipsec6.h>
 100 extern int ipsec_bypass;
 101 extern lck_mtx_t *sadb_mutex;
 102 #endif /*IPSEC*/
 103
 104
 105 #include "faith.h"
 106 #if defined(NFAITH) && 0 < NFAITH
 107 #include <net/if_faith.h>
 108 #endif
 109
 110 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 111 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 112
 113 /*
 114  * Raw interface to IP6 protocol.
 115  */
 116
 117 extern struct   inpcbhead ripcb;
 118 extern struct   inpcbinfo ripcbinfo;
 119 extern u_long   rip_sendspace;
 120 extern u_long   rip_recvspace;
 121 extern u_long  route_generation;
 122
 123 struct rip6stat rip6stat;
 124
 125 /*
 126  * Setup generic address and protocol structures
 127  * for raw_input routine, then pass them along with
 128  * mbuf chain.
 129  */
 130 int
 131 rip6_input(
 132         struct  mbuf **mp,
 133         int     *offp)
 134 {
 135         struct mbuf *m = *mp;
 136         register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 137         register struct inpcb *in6p;
 138         struct inpcb *last = 0;
 139         struct mbuf *opts = NULL;
 140         struct sockaddr_in6 rip6src;
 141         int proto = ip6->ip6_nxt;
 142
 143         rip6stat.rip6s_ipackets++;
 144
 145 #if defined(NFAITH) && 0 < NFAITH
 146         if (faithprefix(&ip6->ip6_dst)) {
 147                 /* XXX send icmp6 host/port unreach? */
 148                 m_freem(m);
 149                 return IPPROTO_DONE;
 150         }
 151 #endif
 152
 153         init_sin6(&rip6src, m); /* general init */
 154
 155         lck_rw_lock_shared(ripcbinfo.mtx);
 156         LIST_FOREACH(in6p, &ripcb, inp_list) {
 157                 if ((in6p->in6p_vflag & INP_IPV6) == 0)
 158                         continue;
 159                 if (in6p->in6p_ip6_nxt &&
 160                     in6p->in6p_ip6_nxt != proto)
 161                         continue;
 162                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 163                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 164                         continue;
 165                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 166                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 167                         continue;
 168                 if (in6p->in6p_cksum != -1) {
 169                         rip6stat.rip6s_isum++;
 170                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 171                             m->m_pkthdr.len - *offp)) {
 172                                 rip6stat.rip6s_badsum++;
 173                                 continue;
 174                         }
 175                 }
 176                 if (last) {
 177                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
 178
 179 #if IPSEC
 180                         /*
 181                          * Check AH/ESP integrity.
 182                          */
 183                         if (ipsec_bypass == 0 && n) {
 184                                 lck_mtx_lock(sadb_mutex);
 185                                 if (ipsec6_in_reject_so(n, last->inp_socket)) {
 186                                         m_freem(n);
 187                                         ipsec6stat.in_polvio++;
 188                                         /* do not inject data into pcb */
 189                                 }
 190                                 lck_mtx_unlock(sadb_mutex);
 191                         } else
 192 #endif /*IPSEC*/
 193                         if (n) {
 194                                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 195                                     last->in6p_socket->so_options & SO_TIMESTAMP)
 196                                         ip6_savecontrol(last, &opts, ip6, n);
 197                                 /* strip intermediate headers */
 198                                 m_adj(n, *offp);
 199                                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 200                                                 (struct sockaddr *)&rip6src,
 201                                                  n, opts, NULL) == 0) {
 202                                         rip6stat.rip6s_fullsock++;
 203                                 } else
 204                                         sorwakeup(last->in6p_socket);
 205                                 opts = NULL;
 206                         }
 207                 }
 208                 last = in6p;
 209         }
 210         lck_rw_done(ripcbinfo.mtx);
 211 #if IPSEC
 212         /*
 213          * Check AH/ESP integrity.
 214          */
 215         if (ipsec_bypass == 0 && last) {
 216                 lck_mtx_lock(sadb_mutex);
 217                 if  (ipsec6_in_reject_so(m, last->inp_socket)) {
 218                         m_freem(m);
 219                         ipsec6stat.in_polvio++;
 220                         ip6stat.ip6s_delivered--;
 221                         /* do not inject data into pcb */
 222                 }
 223                 lck_mtx_unlock(sadb_mutex);
 224         } else
 225 #endif /*IPSEC*/
 226         if (last) {
 227                 if (last->in6p_flags & IN6P_CONTROLOPTS ||
 228                     last->in6p_socket->so_options & SO_TIMESTAMP)
 229                         ip6_savecontrol(last, &opts, ip6, m);
 230                 /* strip intermediate headers */
 231                 m_adj(m, *offp);
 232                 if (sbappendaddr(&last->in6p_socket->so_rcv,
 233                                 (struct sockaddr *)&rip6src, m, opts, NULL) == 0) {
 234                         rip6stat.rip6s_fullsock++;
 235                 } else
 236                         sorwakeup(last->in6p_socket);
 237         } else {
 238                 rip6stat.rip6s_nosock++;
 239                 if (m->m_flags & M_MCAST)
 240                         rip6stat.rip6s_nosockmcast++;
 241                 if (proto == IPPROTO_NONE)
 242                         m_freem(m);
 243                 else {
 244                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 245                         icmp6_error(m, ICMP6_PARAM_PROB,
 246                                     ICMP6_PARAMPROB_NEXTHEADER,
 247                                     prvnxtp - mtod(m, char *));
 248                 }
 249                 ip6stat.ip6s_delivered--;
 250         }
 251         return IPPROTO_DONE;
 252 }
 253
 254 void
 255 rip6_ctlinput(
 256         int cmd,
 257         struct sockaddr *sa,
 258         void *d)
 259 {
 260         struct ip6_hdr *ip6;
 261         struct mbuf *m;
 262         int off = 0;
 263         struct ip6ctlparam *ip6cp = NULL;
 264         const struct sockaddr_in6 *sa6_src = NULL;
 265         void (*notify)(struct inpcb *, int) = in6_rtchange;
 266
 267         if (sa->sa_family != AF_INET6 ||
 268             sa->sa_len != sizeof(struct sockaddr_in6))
 269                 return;
 270
 271         if ((unsigned)cmd >= PRC_NCMDS)
 272                 return;
 273         if (PRC_IS_REDIRECT(cmd))
 274                 notify = in6_rtchange, d = NULL;
 275         else if (cmd == PRC_HOSTDEAD)
 276                 d = NULL;
 277         else if (inet6ctlerrmap[cmd] == 0)
 278                 return;
 279
 280         /* if the parameter is from icmp6, decode it. */
 281         if (d != NULL) {
 282                 ip6cp = (struct ip6ctlparam *)d;
 283                 m = ip6cp->ip6c_m;
 284                 ip6 = ip6cp->ip6c_ip6;
 285                 off = ip6cp->ip6c_off;
 286                 sa6_src = ip6cp->ip6c_src;
 287         } else {
 288                 m = NULL;
 289                 ip6 = NULL;
 290                 sa6_src = &sa6_any;
 291         }
 292
 293         (void) in6_pcbnotify(&ripcbinfo, sa, 0, (struct sockaddr *)sa6_src,
 294                              0, cmd, notify);
 295 }
 296
 297 /*
 298  * Generate IPv6 header and pass packet to ip6_output.
 299  * Tack on options user may have setup with control call.
 300  */
 301 int
 302 rip6_output(
 303         register struct mbuf *m,
 304         struct socket *so,
 305         struct sockaddr_in6 *dstsock,
 306         struct mbuf *control)
 307 {
 308         struct in6_addr *dst;
 309         struct ip6_hdr *ip6;
 310         struct inpcb *in6p;
 311         u_int   plen = m->m_pkthdr.len;
 312         int error = 0;
 313         struct ip6_pktopts opt, *optp = 0;
 314         struct ifnet *oifp = NULL;
 315         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 316         int priv = 0;
 317
 318         in6p = sotoin6pcb(so);
 319
 320         priv = 0;
 321         if (so->so_uid == 0)
 322                 priv = 1;
 323         dst = &dstsock->sin6_addr;
 324         if (control) {
 325                 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
 326                         goto bad;
 327                 optp = &opt;
 328         } else
 329                 optp = in6p->in6p_outputopts;
 330
 331         /*
 332          * For an ICMPv6 packet, we should know its type and code
 333          * to update statistics.
 334          */
 335         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 336                 struct icmp6_hdr *icmp6;
 337                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 338                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 339                         error = ENOBUFS;
 340                         goto bad;
 341                 }
 342                 icmp6 = mtod(m, struct icmp6_hdr *);
 343                 type = icmp6->icmp6_type;
 344                 code = icmp6->icmp6_code;
 345         }
 346
 347         M_PREPEND(m, sizeof(*ip6), M_WAIT);
 348         ip6 = mtod(m, struct ip6_hdr *);
 349
 350         /*
 351          * Next header might not be ICMP6 but use its pseudo header anyway.
 352          */
 353         ip6->ip6_dst = *dst;
 354
 355         /*
 356          * If the scope of the destination is link-local, embed the interface
 357          * index in the address.
 358          *
 359          * XXX advanced-api value overrides sin6_scope_id
 360          */
 361         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 362                 struct in6_pktinfo *pi;
 363
 364                 /*
 365                  * XXX Boundary check is assumed to be already done in
 366                  * ip6_setpktoptions().
 367                  */
 368                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 369                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 370                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 371                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 372                          in6p->in6p_moptions &&
 373                          in6p->in6p_moptions->im6o_multicast_ifp) {
 374                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 375                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 376                 } else if (dstsock->sin6_scope_id) {
 377                         /* boundary check */
 378                         if (dstsock->sin6_scope_id < 0
 379                          || if_index < dstsock->sin6_scope_id) {
 380                                 error = ENXIO;  /* XXX EINVAL? */
 381                                 goto bad;
 382                         }
 383                         ip6->ip6_dst.s6_addr16[1]
 384                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
 385                 }
 386         }
 387
 388         /*
 389          * Source address selection.
 390          */
 391         {
 392                 struct in6_addr *in6a;
 393                 struct in6_addr storage;
 394
 395                 if ((in6a = in6_selectsrc(dstsock, optp,
 396                                           in6p->in6p_moptions,
 397                                           &in6p->in6p_route,
 398                                           &in6p->in6p_laddr,
 399                                           &storage, &error)) == 0) {
 400                         if (error == 0)
 401                                 error = EADDRNOTAVAIL;
 402                         goto bad;
 403                 }
 404                 ip6->ip6_src = *in6a;
 405                 if (in6p->in6p_route.ro_rt)
 406                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 407         }
 408         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 409                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 410         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 411                 (IPV6_VERSION & IPV6_VERSION_MASK);
 412         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 413         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 414         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 415
 416         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 417             in6p->in6p_cksum != -1) {
 418                 struct mbuf *n;
 419                 int off;
 420                 u_int16_t *p;
 421
 422                 /* compute checksum */
 423                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 424                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 425                 else
 426                         off = in6p->in6p_cksum;
 427                 if (plen < off + 1) {
 428                         error = EINVAL;
 429                         goto bad;
 430                 }
 431                 off += sizeof(struct ip6_hdr);
 432
 433                 n = m;
 434                 while (n && n->m_len <= off) {
 435                         off -= n->m_len;
 436                         n = n->m_next;
 437                 }
 438                 if (!n)
 439                         goto bad;
 440                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 441                 *p = 0;
 442                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 443         }
 444
 445 #if IPSEC
 446         if (ipsec_bypass == 0 && ipsec_setsocket(m, so) != 0) {
 447                 error = ENOBUFS;
 448                 goto bad;
 449         }
 450 #endif /*IPSEC*/
 451
 452         if (in6p->in6p_route.ro_rt && in6p->in6p_route.ro_rt->generation_id != route_generation) {
 453                 rtfree(in6p->in6p_route.ro_rt);
 454                 in6p->in6p_route.ro_rt = (struct rtentry *)0;
 455         }
 456
 457         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 458                            in6p->in6p_moptions, &oifp, 0);
 459         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 460                 if (oifp)
 461                         icmp6_ifoutstat_inc(oifp, type, code);
 462                 icmp6stat.icp6s_outhist[type]++;
 463         } else
 464                 rip6stat.rip6s_opackets++;
 465
 466         goto freectl;
 467
 468  bad:
 469         if (m)
 470                 m_freem(m);
 471
 472  freectl:
 473         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 474                 rtfree(optp->ip6po_route.ro_rt);
 475         if (control) {
 476                 if (optp == &opt)
 477                         ip6_clearpktopts(optp, 0, -1);
 478                 m_freem(control);
 479         }
 480         return(error);
 481 }
 482
 483 static void
 484 load_ip6fw()
 485 {
 486         ip6_fw_init();
 487 }
 488
 489 /*
 490  * Raw IPv6 socket option processing.
 491  */
 492 int
 493 rip6_ctloutput(
 494         struct socket *so,
 495         struct sockopt *sopt)
 496 {
 497         int error;
 498
 499         if (sopt->sopt_level == IPPROTO_ICMPV6)
 500                 /*
 501                  * XXX: is it better to call icmp6_ctloutput() directly
 502                  * from protosw?
 503                  */
 504                 return(icmp6_ctloutput(so, sopt));
 505         else if (sopt->sopt_level != IPPROTO_IPV6)
 506                 return (EINVAL);
 507
 508         error = 0;
 509
 510         switch (sopt->sopt_dir) {
 511         case SOPT_GET:
 512                 switch (sopt->sopt_name) {
 513                 case IPV6_FW_ADD:
 514                 case IPV6_FW_GET:
 515                         if (ip6_fw_ctl_ptr == 0)
 516                                 load_ip6fw();
 517                         if (ip6_fw_ctl_ptr)
 518                                 error = ip6_fw_ctl_ptr(sopt);
 519                         else
 520                                 error = ENOPROTOOPT;
 521                         break;
 522
 523                 case MRT6_INIT:
 524                 case MRT6_DONE:
 525                 case MRT6_ADD_MIF:
 526                 case MRT6_DEL_MIF:
 527                 case MRT6_ADD_MFC:
 528                 case MRT6_DEL_MFC:
 529                 case MRT6_PIM:
 530                         error = ip6_mrouter_get(so, sopt);
 531                         break;
 532                 default:
 533                         error = ip6_ctloutput(so, sopt);
 534                         break;
 535                 }
 536                 break;
 537
 538         case SOPT_SET:
 539                 switch (sopt->sopt_name) {
 540                 case IPV6_FW_ADD:
 541                 case IPV6_FW_DEL:
 542                 case IPV6_FW_FLUSH:
 543                 case IPV6_FW_ZERO:
 544                         if (ip6_fw_ctl_ptr == 0)
 545                                 load_ip6fw();
 546                         if (ip6_fw_ctl_ptr)
 547                                 error = ip6_fw_ctl_ptr(sopt);
 548                         else
 549                                 error = ENOPROTOOPT;
 550                         break;
 551
 552                 case MRT6_INIT:
 553                 case MRT6_DONE:
 554                 case MRT6_ADD_MIF:
 555                 case MRT6_DEL_MIF:
 556                 case MRT6_ADD_MFC:
 557                 case MRT6_DEL_MFC:
 558                 case MRT6_PIM:
 559                         error = ip6_mrouter_set(so, sopt);
 560                         break;
 561                 default:
 562                         error = ip6_ctloutput(so, sopt);
 563                         break;
 564                 }
 565                 break;
 566         }
 567
 568         return (error);
 569 }
 570
 571 static int
 572 rip6_attach(struct socket *so, int proto, struct proc *p)
 573 {
 574         struct inpcb *inp;
 575         int error, s;
 576
 577         inp = sotoinpcb(so);
 578         if (inp)
 579                 panic("rip6_attach");
 580         if (p && (error = proc_suser(p)) != 0)
 581                 return error;
 582
 583         error = soreserve(so, rip_sendspace, rip_recvspace);
 584         if (error)
 585                 return error;
 586         s = splnet();
 587         error = in_pcballoc(so, &ripcbinfo, p);
 588         splx(s);
 589         if (error)
 590                 return error;
 591         inp = (struct inpcb *)so->so_pcb;
 592         inp->inp_vflag |= INP_IPV6;
 593         inp->in6p_ip6_nxt = (long)proto;
 594         inp->in6p_hops = -1;    /* use kernel default */
 595         inp->in6p_cksum = -1;
 596         MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
 597                sizeof(struct icmp6_filter), M_PCB, M_WAITOK);
 598         if (inp->in6p_icmp6filt == NULL)
 599                 return (ENOMEM);
 600         ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 601         return 0;
 602 }
 603
 604 static int
 605 rip6_detach(struct socket *so)
 606 {
 607         struct inpcb *inp;
 608
 609         inp = sotoinpcb(so);
 610         if (inp == 0)
 611                 panic("rip6_detach");
 612         /* xxx: RSVP */
 613         if (so == ip6_mrouter)
 614                 ip6_mrouter_done();
 615         if (inp->in6p_icmp6filt) {
 616                 FREE(inp->in6p_icmp6filt, M_PCB);
 617                 inp->in6p_icmp6filt = NULL;
 618         }
 619         in6_pcbdetach(inp);
 620         return 0;
 621 }
 622
 623 static int
 624 rip6_abort(struct socket *so)
 625 {
 626         soisdisconnected(so);
 627         return rip6_detach(so);
 628 }
 629
 630 static int
 631 rip6_disconnect(struct socket *so)
 632 {
 633         struct inpcb *inp = sotoinpcb(so);
 634
 635         if ((so->so_state & SS_ISCONNECTED) == 0)
 636                 return ENOTCONN;
 637         inp->in6p_faddr = in6addr_any;
 638         return rip6_abort(so);
 639 }
 640
 641 static int
 642 rip6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
 643 {
 644         struct inpcb *inp = sotoinpcb(so);
 645         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 646         struct ifaddr *ia = NULL;
 647
 648         if (nam->sa_len != sizeof(*addr))
 649                 return EINVAL;
 650
 651         if (TAILQ_EMPTY(&ifnet_head) || addr->sin6_family != AF_INET6)
 652                 return EADDRNOTAVAIL;
 653 #if ENABLE_DEFAULT_SCOPE
 654         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 655                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 656         }
 657 #endif
 658         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 659             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
 660                 return EADDRNOTAVAIL;
 661         if (ia &&
 662             ((struct in6_ifaddr *)ia)->ia6_flags &
 663             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 664              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 665             if (ia) ifafree(ia);
 666                 return(EADDRNOTAVAIL);
 667         }
 668         ifafree(ia);
 669         inp->in6p_laddr = addr->sin6_addr;
 670         return 0;
 671 }
 672
 673 static int
 674 rip6_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
 675 {
 676         struct inpcb *inp = sotoinpcb(so);
 677         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 678         struct in6_addr *in6a = NULL;
 679         struct in6_addr storage;
 680         int error = 0;
 681 #if ENABLE_DEFAULT_SCOPE
 682         struct sockaddr_in6 tmp;
 683 #endif
 684
 685         if (nam->sa_len != sizeof(*addr))
 686                 return EINVAL;
 687         if (TAILQ_EMPTY(&ifnet_head))
 688                 return EADDRNOTAVAIL;
 689         if (addr->sin6_family != AF_INET6)
 690                 return EAFNOSUPPORT;
 691 #if ENABLE_DEFAULT_SCOPE
 692         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 693                 /* avoid overwrites */
 694                 tmp = *addr;
 695                 addr = &tmp;
 696                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 697         }
 698 #endif
 699         /* Source address selection. XXX: need pcblookup? */
 700         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 701                              inp->in6p_moptions, &inp->in6p_route,
 702                              &inp->in6p_laddr, &storage, &error);
 703         if (in6a == NULL)
 704                 return (error ? error : EADDRNOTAVAIL);
 705         inp->in6p_laddr = *in6a;
 706         inp->in6p_faddr = addr->sin6_addr;
 707         soisconnected(so);
 708         return 0;
 709 }
 710
 711 static int
 712 rip6_shutdown(struct socket *so)
 713 {
 714         socantsendmore(so);
 715         return 0;
 716 }
 717
 718 static int
 719 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
 720          struct mbuf *control, struct proc *p)
 721 {
 722         struct inpcb *inp = sotoinpcb(so);
 723         struct sockaddr_in6 tmp;
 724         struct sockaddr_in6 *dst;
 725
 726         /* always copy sockaddr to avoid overwrites */
 727         if (so->so_state & SS_ISCONNECTED) {
 728                 if (nam) {
 729                         m_freem(m);
 730                         return EISCONN;
 731                 }
 732                 /* XXX */
 733                 bzero(&tmp, sizeof(tmp));
 734                 tmp.sin6_family = AF_INET6;
 735                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 736                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 737                       sizeof(struct in6_addr));
 738                 dst = &tmp;
 739         } else {
 740                 if (nam == NULL) {
 741                         m_freem(m);
 742                         return ENOTCONN;
 743                 }
 744                 tmp = *(struct sockaddr_in6 *)nam;
 745                 dst = &tmp;
 746         }
 747 #if ENABLE_DEFAULT_SCOPE
 748         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 749                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 750         }
 751 #endif
 752         return rip6_output(m, so, dst, control);
 753 }
 754
 755 struct pr_usrreqs rip6_usrreqs = {
 756         rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect,
 757         pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
 758         pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
 759         pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown,
 760         in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
 761 };