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_inet6.h"
  64
  65 #include <sys/param.h>
  66 #include <sys/malloc.h>
  67 #include <sys/proc.h>
  68 #include <sys/caps.h>
  69 #include <sys/mbuf.h>
  70 #include <sys/socket.h>
  71 #include <sys/jail.h>
  72 #include <sys/protosw.h>
  73 #include <sys/socketvar.h>
  74 #include <sys/errno.h>
  75 #include <sys/systm.h>
  76
  77 #include <sys/thread2.h>
  78 #include <sys/socketvar2.h>
  79 #include <sys/msgport2.h>
  80
  81 #include <net/if.h>
  82 #include <net/route.h>
  83 #include <net/if_types.h>
  84
  85 #include <netinet/in.h>
  86 #include <netinet/in_var.h>
  87 #include <netinet/in_systm.h>
  88 #include <netinet/ip6.h>
  89 #include <netinet6/ip6_var.h>
  90 #include <netinet6/ip6_mroute.h>
  91 #include <netinet/icmp6.h>
  92 #include <netinet/in_pcb.h>
  93 #include <netinet6/in6_pcb.h>
  94 #include <netinet6/nd6.h>
  95 #include <netinet6/ip6protosw.h>
  96 #ifdef ENABLE_DEFAULT_SCOPE
  97 #include <netinet6/scope6_var.h>
  98 #endif
  99 #include <netinet6/raw_ip6.h>
 100
 101 #include <machine/stdarg.h>
 102
 103 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
 104 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
 105
 106 /*
 107  * Raw interface to IP6 protocol.
 108  */
 109
 110 extern struct   inpcbinfo ripcbinfo;
 111 extern u_long   rip_sendspace;
 112 extern u_long   rip_recvspace;
 113
 114 struct rip6stat rip6stat;
 115
 116 /*
 117  * Setup generic address and protocol structures
 118  * for raw_input routine, then pass them along with
 119  * mbuf chain.
 120  */
 121 int
 122 rip6_input(struct mbuf **mp, int *offp, int proto)
 123 {
 124         struct mbuf *m = *mp;
 125         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
 126         struct inpcb *in6p;
 127         struct inpcb *last = NULL;
 128         struct mbuf *opts = NULL;
 129         struct sockaddr_in6 rip6src;
 130
 131         rip6stat.rip6s_ipackets++;
 132
 133         init_sin6(&rip6src, m); /* general init */
 134
 135         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
 136                 if (in6p->in6p_flags & INP_PLACEMARKER)
 137                         continue;
 138                 if (!INP_ISIPV6(in6p))
 139                         continue;
 140                 if (in6p->in6p_ip6_nxt &&
 141                     in6p->in6p_ip6_nxt != proto)
 142                         continue;
 143                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
 144                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
 145                         continue;
 146                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
 147                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
 148                         continue;
 149                 if (in6p->in6p_cksum != -1) {
 150                         rip6stat.rip6s_isum++;
 151                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
 152                             m->m_pkthdr.len - *offp)) {
 153                                 rip6stat.rip6s_badsum++;
 154                                 continue;
 155                         }
 156                 }
 157                 if (last) {
 158                         struct mbuf *n;
 159
 160                         n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
 161                         if (n != NULL) {
 162                                 struct socket *so;
 163
 164                                 so = last->in6p_socket;
 165                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 166                                     (so->so_options & SO_TIMESTAMP)) {
 167                                         ip6_savecontrol(last, &opts, ip6, n);
 168                                 }
 169                                 /* strip intermediate headers */
 170                                 m_adj(n, *offp);
 171                                 lwkt_gettoken(&so->so_rcv.ssb_token);
 172                                 if (ssb_appendaddr(&so->so_rcv,
 173                                                 (struct sockaddr *)&rip6src,
 174                                                  n, opts) == 0) {
 175                                         m_freem(n);
 176                                         if (opts)
 177                                                 m_freem(opts);
 178                                         rip6stat.rip6s_fullsock++;
 179                                         soroverflow(so);
 180                                 } else {
 181                                         sorwakeup(so);
 182                                 }
 183                                 lwkt_reltoken(&so->so_rcv.ssb_token);
 184                                 opts = NULL;
 185                         }
 186                 }
 187                 last = in6p;
 188         }
 189         if (last) {
 190                 struct socket *so;
 191
 192                 so = last->in6p_socket;
 193                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 194                     (so->so_options & SO_TIMESTAMP)) {
 195                         ip6_savecontrol(last, &opts, ip6, m);
 196                 }
 197                 /* strip intermediate headers */
 198                 m_adj(m, *offp);
 199                 lwkt_gettoken(&so->so_rcv.ssb_token);
 200                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
 201                                    m, opts) == 0) {
 202                         m_freem(m);
 203                         if (opts)
 204                                 m_freem(opts);
 205                         rip6stat.rip6s_fullsock++;
 206                         soroverflow(so);
 207                 } else {
 208                         sorwakeup(so);
 209                 }
 210                 lwkt_reltoken(&so->so_rcv.ssb_token);
 211         } else {
 212                 rip6stat.rip6s_nosock++;
 213                 if (m->m_flags & M_MCAST)
 214                         rip6stat.rip6s_nosockmcast++;
 215                 if (proto == IPPROTO_NONE)
 216                         m_freem(m);
 217                 else {
 218                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
 219                         icmp6_error(m, ICMP6_PARAM_PROB,
 220                                     ICMP6_PARAMPROB_NEXTHEADER,
 221                                     prvnxtp - mtod(m, char *));
 222                 }
 223                 ip6stat.ip6s_delivered--;
 224         }
 225         return IPPROTO_DONE;
 226 }
 227
 228 void
 229 rip6_ctlinput(netmsg_t msg)
 230 {
 231         int cmd = msg->ctlinput.nm_cmd;
 232         struct sockaddr *sa = msg->ctlinput.nm_arg;
 233         void *d = msg->ctlinput.nm_extra;
 234         struct ip6ctlparam *ip6cp = NULL;
 235         const struct sockaddr_in6 *sa6_src = NULL;
 236         inp_notify_t notify = in6_rtchange;
 237
 238         if (sa->sa_family != AF_INET6 ||
 239             sa->sa_len != sizeof(struct sockaddr_in6))
 240                 goto out;
 241
 242         if ((unsigned)cmd >= PRC_NCMDS)
 243                 goto out;
 244         if (PRC_IS_REDIRECT(cmd))
 245                 notify = in6_rtchange, d = NULL;
 246         else if (cmd == PRC_HOSTDEAD)
 247                 d = NULL;
 248         else if (inet6ctlerrmap[cmd] == 0)
 249                 goto out;
 250
 251         /* if the parameter is from icmp6, decode it. */
 252         if (d != NULL) {
 253                 ip6cp = (struct ip6ctlparam *)d;
 254                 sa6_src = ip6cp->ip6c_src;
 255         } else {
 256                 sa6_src = &sa6_any;
 257         }
 258
 259         in6_pcbnotify(&ripcbinfo, sa, 0,
 260                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
 261 out:
 262         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 263 }
 264
 265 /*
 266  * Generate IPv6 header and pass packet to ip6_output.
 267  * Tack on options user may have setup with control call.
 268  */
 269 int
 270 rip6_output(struct mbuf *m, struct socket *so, ...)
 271 {
 272         struct sockaddr_in6 *dstsock;
 273         struct mbuf *control;
 274         struct in6_addr *dst;
 275         struct ip6_hdr *ip6;
 276         struct inpcb *in6p;
 277         u_int   plen = m->m_pkthdr.len;
 278         int error = 0;
 279         struct ip6_pktopts opt, *optp = NULL;
 280         struct ifnet *oifp = NULL;
 281         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
 282         int priv = 0;
 283         __va_list ap;
 284
 285         __va_start(ap, so);
 286         dstsock = __va_arg(ap, struct sockaddr_in6 *);
 287         control = __va_arg(ap, struct mbuf *);
 288         __va_end(ap);
 289
 290         if (IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
 291                 error = EADDRNOTAVAIL;
 292                 goto bad;
 293         }
 294
 295         in6p = so->so_pcb;
 296
 297         priv = 0;
 298         if (so->so_cred->cr_uid == 0)
 299                 priv = 1;
 300         dst = &dstsock->sin6_addr;
 301         if (control) {
 302                 if ((error = ip6_setpktoptions(control, &opt,
 303                     in6p->in6p_outputopts,
 304                     so->so_proto->pr_protocol, priv)) != 0)
 305                         goto bad;
 306                 optp = &opt;
 307         } else
 308                 optp = in6p->in6p_outputopts;
 309
 310         /*
 311          * For an ICMPv6 packet, we should know its type and code
 312          * to update statistics.
 313          */
 314         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 315                 struct icmp6_hdr *icmp6;
 316                 if (m->m_len < sizeof(struct icmp6_hdr) &&
 317                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
 318                         error = ENOBUFS;
 319                         goto bad;
 320                 }
 321                 icmp6 = mtod(m, struct icmp6_hdr *);
 322                 type = icmp6->icmp6_type;
 323                 code = icmp6->icmp6_code;
 324         }
 325
 326         M_PREPEND(m, sizeof(*ip6), M_WAITOK);
 327         ip6 = mtod(m, struct ip6_hdr *);
 328
 329         /*
 330          * Next header might not be ICMP6 but use its pseudo header anyway.
 331          */
 332         ip6->ip6_dst = *dst;
 333
 334         /*
 335          * If the scope of the destination is link-local, embed the interface
 336          * index in the address.
 337          *
 338          * XXX advanced-api value overrides sin6_scope_id
 339          */
 340         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
 341                 struct in6_pktinfo *pi;
 342
 343                 /*
 344                  * XXX Boundary check is assumed to be already done in
 345                  * ip6_setpktoptions().
 346                  */
 347                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
 348                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
 349                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
 350                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
 351                          in6p->in6p_moptions &&
 352                          in6p->in6p_moptions->im6o_multicast_ifp) {
 353                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
 354                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
 355                 } else if (dstsock->sin6_scope_id) {
 356                         /* boundary check */
 357                         if (dstsock->sin6_scope_id < 0 ||
 358                             if_index < dstsock->sin6_scope_id) {
 359                                 error = ENXIO;  /* XXX EINVAL? */
 360                                 goto bad;
 361                         }
 362                         ip6->ip6_dst.s6_addr16[1] =
 363                             htons(dstsock->sin6_scope_id & 0xffff); /* XXX */
 364                 }
 365         }
 366
 367         /*
 368          * Source address selection.
 369          */
 370         {
 371                 struct in6_addr *in6a;
 372
 373                 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions,
 374                     &in6p->in6p_route, &in6p->in6p_laddr, &error, NULL))
 375                     == NULL) {
 376                         if (error == 0)
 377                                 error = EADDRNOTAVAIL;
 378                         goto bad;
 379                 }
 380                 ip6->ip6_src = *in6a;
 381                 if (in6p->in6p_route.ro_rt)
 382                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
 383         }
 384         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
 385                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
 386         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
 387                 (IPV6_VERSION & IPV6_VERSION_MASK);
 388         /* ip6_plen will be filled in ip6_output, so not fill it here. */
 389         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
 390         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
 391
 392         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
 393             in6p->in6p_cksum != -1) {
 394                 struct mbuf *n;
 395                 int off;
 396                 u_int16_t *p;
 397
 398                 /* compute checksum */
 399                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
 400                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
 401                 else
 402                         off = in6p->in6p_cksum;
 403                 if (plen < off + 1) {
 404                         error = EINVAL;
 405                         goto bad;
 406                 }
 407                 off += sizeof(struct ip6_hdr);
 408
 409                 n = m;
 410                 while (n && n->m_len <= off) {
 411                         off -= n->m_len;
 412                         n = n->m_next;
 413                 }
 414                 if (!n)
 415                         goto bad;
 416                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
 417                 *p = 0;
 418                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
 419         }
 420
 421         error = ip6_output(m, optp, &in6p->in6p_route, 0,
 422                            in6p->in6p_moptions, &oifp, in6p);
 423         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
 424                 if (oifp)
 425                         icmp6_ifoutstat_inc(oifp, type, code);
 426                 icmp6stat.icp6s_outhist[type]++;
 427         } else
 428                 rip6stat.rip6s_opackets++;
 429
 430         goto freectl;
 431
 432 bad:
 433         if (m)
 434                 m_freem(m);
 435
 436 freectl:
 437         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
 438                 RTFREE(optp->ip6po_route.ro_rt);
 439         if (control) {
 440                 if (optp == &opt)
 441                         ip6_clearpktopts(optp, -1);
 442                 m_freem(control);
 443         }
 444         return (error);
 445 }
 446
 447 /*
 448  * Raw IPv6 socket option processing.
 449  */
 450 void
 451 rip6_ctloutput(netmsg_t msg)
 452 {
 453         struct socket *so = msg->ctloutput.base.nm_so;
 454         struct sockopt *sopt = msg->ctloutput.nm_sopt;
 455         int error;
 456
 457         if (sopt->sopt_level == IPPROTO_ICMPV6) {
 458                 /*
 459                  * XXX: is it better to call icmp6_ctloutput() directly
 460                  * from protosw?
 461                  */
 462                 icmp6_ctloutput(msg);
 463                 /* msg invalid now */
 464                 return;
 465         }
 466         if (sopt->sopt_level != IPPROTO_IPV6) {
 467                 error = EINVAL;
 468                 goto out;
 469         }
 470
 471         error = 0;
 472
 473         switch (sopt->sopt_dir) {
 474         case SOPT_GET:
 475                 switch (sopt->sopt_name) {
 476                 case MRT6_INIT:
 477                 case MRT6_DONE:
 478                 case MRT6_ADD_MIF:
 479                 case MRT6_DEL_MIF:
 480                 case MRT6_ADD_MFC:
 481                 case MRT6_DEL_MFC:
 482                 case MRT6_PIM:
 483                         error = ip6_mrouter_get(so, sopt);
 484                         break;
 485                 case IPV6_CHECKSUM:
 486                         error = ip6_raw_ctloutput(so, sopt);
 487                         break;
 488                 default:
 489                         error = ip6_ctloutput(so, sopt);
 490                         break;
 491                 }
 492                 break;
 493
 494         case SOPT_SET:
 495                 switch (sopt->sopt_name) {
 496                 case MRT6_INIT:
 497                 case MRT6_DONE:
 498                 case MRT6_ADD_MIF:
 499                 case MRT6_DEL_MIF:
 500                 case MRT6_ADD_MFC:
 501                 case MRT6_DEL_MFC:
 502                 case MRT6_PIM:
 503                         error = ip6_mrouter_set(so, sopt);
 504                         break;
 505                 case IPV6_CHECKSUM:
 506                         error = ip6_raw_ctloutput(so, sopt);
 507                         break;
 508                 default:
 509                         error = ip6_ctloutput(so, sopt);
 510                         break;
 511                 }
 512                 break;
 513         }
 514 out:
 515         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
 516 }
 517
 518 static void
 519 rip6_attach(netmsg_t msg)
 520 {
 521         struct socket *so = msg->attach.base.nm_so;
 522         int proto = msg->attach.nm_proto;
 523         struct pru_attach_info *ai = msg->attach.nm_ai;
 524         struct inpcb *inp;
 525         int error;
 526
 527         inp = so->so_pcb;
 528         if (inp)
 529                 panic("rip6_attach");
 530         error = caps_priv_check(ai->p_ucred,
 531                                 SYSCAP_NONET_RAW | __SYSCAP_NULLCRED);
 532         if (error)
 533                 goto out;
 534
 535         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
 536         if (error)
 537                 goto out;
 538         crit_enter();
 539         error = in_pcballoc(so, &ripcbinfo);
 540         crit_exit();
 541         if (error)
 542                 goto out;
 543         inp = (struct inpcb *)so->so_pcb;
 544         inp->in6p_ip6_nxt = (long)proto;
 545         inp->in6p_hops = -1;    /* use kernel default */
 546         inp->in6p_cksum = -1;
 547         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
 548                                       M_NOWAIT);
 549         if (inp->in6p_icmp6filt != NULL)
 550                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
 551         error = 0;
 552 out:
 553         lwkt_replymsg(&msg->attach.base.lmsg, error);
 554 }
 555
 556 static void
 557 rip6_detach(netmsg_t msg)
 558 {
 559         struct socket *so = msg->detach.base.nm_so;
 560         struct inpcb *inp;
 561
 562         inp = so->so_pcb;
 563         if (inp == NULL)
 564                 panic("rip6_detach");
 565         /* xxx: RSVP */
 566         if (so == ip6_mrouter)
 567                 ip6_mrouter_done();
 568         if (inp->in6p_icmp6filt) {
 569                 kfree(inp->in6p_icmp6filt, M_PCB);
 570                 inp->in6p_icmp6filt = NULL;
 571         }
 572         in6_pcbdetach(inp);
 573         lwkt_replymsg(&msg->detach.base.lmsg, 0);
 574 }
 575
 576 /*
 577  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 578  *       will sofree() it when we return.
 579  */
 580 static void
 581 rip6_abort(netmsg_t msg)
 582 {
 583         soisdisconnected(msg->abort.base.nm_so);
 584         rip6_detach(msg);
 585         /* msg invalid now */
 586 }
 587
 588 static void
 589 rip6_disconnect(netmsg_t msg)
 590 {
 591         struct socket *so = msg->disconnect.base.nm_so;
 592         struct inpcb *inp = so->so_pcb;
 593
 594         if (so->so_state & SS_ISCONNECTED) {
 595                 inp->in6p_faddr = kin6addr_any;
 596                 soreference(so);
 597                 rip6_abort(msg);
 598                 /* msg invalid now */
 599                 sofree(so);
 600                 return;
 601         }
 602         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
 603 }
 604
 605 static void
 606 rip6_bind(netmsg_t msg)
 607 {
 608         struct socket *so = msg->bind.base.nm_so;
 609         struct sockaddr *nam = msg->bind.nm_nam;
 610         struct inpcb *inp = so->so_pcb;
 611         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 612         struct ifaddr *ia = NULL;
 613         int error;
 614
 615         if (nam->sa_len != sizeof(*addr)) {
 616                 error = EINVAL;
 617                 goto out;
 618         }
 619         if (ifnet_array_isempty() || addr->sin6_family != AF_INET6) {
 620                 error = EADDRNOTAVAIL;
 621                 goto out;
 622         }
 623         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
 624                 error = EADDRNOTAVAIL;
 625                 goto out;
 626         }
 627 #ifdef ENABLE_DEFAULT_SCOPE
 628         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 629                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 630         }
 631 #endif
 632         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
 633             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
 634                 error = EADDRNOTAVAIL;
 635                 goto out;
 636         }
 637         if (ia &&
 638             ((struct in6_ifaddr *)ia)->ia6_flags &
 639             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
 640              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
 641                 error = EADDRNOTAVAIL;
 642                 goto out;
 643         }
 644         inp->in6p_laddr = addr->sin6_addr;
 645         error = 0;
 646 out:
 647         lwkt_replymsg(&msg->bind.base.lmsg, error);
 648 }
 649
 650 static void
 651 rip6_connect(netmsg_t msg)
 652 {
 653         struct socket *so = msg->connect.base.nm_so;
 654         struct sockaddr *nam = msg->connect.nm_nam;
 655         struct inpcb *inp = so->so_pcb;
 656         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
 657         struct in6_addr *in6a = NULL;
 658         int error = 0;
 659 #ifdef ENABLE_DEFAULT_SCOPE
 660         struct sockaddr_in6 tmp;
 661 #endif
 662
 663         if (nam->sa_len != sizeof(*addr)) {
 664                 error = EINVAL;
 665                 goto out;
 666         }
 667         if (ifnet_array_isempty()) {
 668                 error = EADDRNOTAVAIL;
 669                 goto out;
 670         }
 671         if (addr->sin6_family != AF_INET6) {
 672                 error = EAFNOSUPPORT;
 673                 goto out;
 674         }
 675         if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) {
 676                 error = EADDRNOTAVAIL;
 677                 goto out;
 678         }
 679 #ifdef ENABLE_DEFAULT_SCOPE
 680         if (addr->sin6_scope_id == 0) { /* not change if specified  */
 681                 /* avoid overwrites */
 682                 tmp = *addr;
 683                 addr = &tmp;
 684                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
 685         }
 686 #endif
 687         /* Source address selection. XXX: need pcblookup? */
 688         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
 689                              inp->in6p_moptions, &inp->in6p_route,
 690                              &inp->in6p_laddr, &error, NULL);
 691         if (in6a == NULL) {
 692                 if (error == 0)
 693                         error = EADDRNOTAVAIL;
 694         } else {
 695                 inp->in6p_laddr = *in6a;
 696                 inp->in6p_faddr = addr->sin6_addr;
 697                 soisconnected(so);
 698                 error = 0;
 699         }
 700 out:
 701         lwkt_replymsg(&msg->connect.base.lmsg, error);
 702 }
 703
 704 static void
 705 rip6_shutdown(netmsg_t msg)
 706 {
 707         socantsendmore(msg->shutdown.base.nm_so);
 708         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
 709 }
 710
 711 static void
 712 rip6_send(netmsg_t msg)
 713 {
 714         struct socket *so = msg->send.base.nm_so;
 715         struct mbuf *m = msg->send.nm_m;
 716         struct sockaddr *nam = msg->send.nm_addr;
 717         struct mbuf *control = msg->send.nm_control;
 718         struct inpcb *inp = so->so_pcb;
 719         struct sockaddr_in6 tmp;
 720         struct sockaddr_in6 *dst;
 721         int error;
 722
 723         /* always copy sockaddr to avoid overwrites */
 724         if (so->so_state & SS_ISCONNECTED) {
 725                 if (nam) {
 726                         m_freem(m);
 727                         error = EISCONN;
 728                         goto out;
 729                 }
 730                 /* XXX */
 731                 bzero(&tmp, sizeof(tmp));
 732                 tmp.sin6_family = AF_INET6;
 733                 tmp.sin6_len = sizeof(struct sockaddr_in6);
 734                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
 735                       sizeof(struct in6_addr));
 736                 dst = &tmp;
 737         } else {
 738                 if (nam == NULL) {
 739                         m_freem(m);
 740                         error = ENOTCONN;
 741                         goto out;
 742                 }
 743                 tmp = *(struct sockaddr_in6 *)nam;
 744                 dst = &tmp;
 745         }
 746 #ifdef ENABLE_DEFAULT_SCOPE
 747         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
 748                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
 749         }
 750 #endif
 751         error = rip6_output(m, so, dst, control);
 752 out:
 753         lwkt_replymsg(&msg->send.base.lmsg, error);
 754 }
 755
 756 struct pr_usrreqs rip6_usrreqs = {
 757         .pru_abort = rip6_abort,
 758         .pru_accept = pr_generic_notsupp,
 759         .pru_attach = rip6_attach,
 760         .pru_bind = rip6_bind,
 761         .pru_connect = rip6_connect,
 762         .pru_connect2 = pr_generic_notsupp,
 763         .pru_control = in6_control_dispatch,
 764         .pru_detach = rip6_detach,
 765         .pru_disconnect = rip6_disconnect,
 766         .pru_listen = pr_generic_notsupp,
 767         .pru_peeraddr = in6_setpeeraddr_dispatch,
 768         .pru_rcvd = pr_generic_notsupp,
 769         .pru_rcvoob = pr_generic_notsupp,
 770         .pru_send = rip6_send,
 771         .pru_sense = pru_sense_null,
 772         .pru_shutdown = rip6_shutdown,
 773         .pru_sockaddr = in6_setsockaddr_dispatch,
 774         .pru_sosend = sosend,
 775         .pru_soreceive = soreceive
 776 };