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