sys/netinet6/udp6_usrreq.c

   1 /*      $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $       */
   2 /*      $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $    */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1982, 1986, 1989, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)udp_var.h   8.1 (Berkeley) 6/10/93
  62  */
  63
  64 #include "opt_inet.h"
  65 #include "opt_inet6.h"
  66
  67 #include <sys/param.h>
  68 #include <sys/kernel.h>
  69 #include <sys/malloc.h>
  70 #include <sys/mbuf.h>
  71 #include <sys/protosw.h>
  72 #include <sys/socket.h>
  73 #include <sys/socketvar.h>
  74 #include <sys/sysctl.h>
  75 #include <sys/errno.h>
  76 #include <sys/stat.h>
  77 #include <sys/systm.h>
  78 #include <sys/syslog.h>
  79 #include <sys/proc.h>
  80 #include <sys/caps.h>
  81 #include <sys/jail.h>
  82
  83 #include <sys/thread2.h>
  84 #include <sys/socketvar2.h>
  85 #include <sys/msgport2.h>
  86
  87 #include <net/if.h>
  88 #include <net/route.h>
  89 #include <net/if_types.h>
  90 #include <net/netisr2.h>
  91
  92 #include <netinet/in.h>
  93 #include <netinet/in_systm.h>
  94 #include <netinet/ip.h>
  95 #include <netinet/in_pcb.h>
  96 #include <netinet/in_var.h>
  97 #include <netinet/ip_var.h>
  98 #include <netinet/udp.h>
  99 #include <netinet/udp_var.h>
 100 #include <netinet/ip6.h>
 101 #include <netinet6/ip6_var.h>
 102 #include <netinet6/in6_pcb.h>
 103 #include <netinet/icmp6.h>
 104 #include <netinet6/udp6_var.h>
 105 #include <netinet6/ip6protosw.h>
 106
 107 /*
 108  * UDP protocol inplementation.
 109  * Per RFC 768, August, 1980.
 110  */
 111
 112 extern  struct protosw inetsw[];
 113 static  int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *);
 114
 115 static int
 116 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp)
 117 {
 118         struct ip6_moptions *im6o = in6p->in6p_moptions;
 119         struct in6_multi_mship *imm;
 120
 121         if (im6o == NULL)
 122                 return 0;
 123
 124         for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
 125              imm = imm->i6mm_chain.le_next) {
 126                 if ((ifp == NULL ||
 127                      imm->i6mm_maddr->in6m_ifp == ifp) &&
 128                     IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
 129                                        ia6))
 130                         return 1;
 131         }
 132         return 0;
 133 }
 134
 135 int
 136 udp6_input(struct mbuf **mp, int *offp, int proto)
 137 {
 138         struct mbuf *m = *mp;
 139         struct ip6_hdr *ip6;
 140         struct udphdr *uh;
 141         struct inpcb *in6p;
 142         struct  mbuf *opts = NULL;
 143         int off = *offp;
 144         int plen, ulen;
 145         struct sockaddr_in6 udp_in6;
 146         struct socket *so;
 147         struct inpcbinfo *pcbinfo = &udbinfo[0];
 148
 149         IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
 150
 151         ip6 = mtod(m, struct ip6_hdr *);
 152
 153         udp_stat.udps_ipackets++;
 154
 155         plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
 156         uh = (struct udphdr *)((caddr_t)ip6 + off);
 157         ulen = ntohs((u_short)uh->uh_ulen);
 158
 159         if (plen != ulen) {
 160                 udp_stat.udps_badlen++;
 161                 goto bad;
 162         }
 163
 164         /*
 165          * Checksum extended UDP header and data.
 166          */
 167         if (uh->uh_sum == 0)
 168                 udp_stat.udps_nosum++;
 169         else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
 170                 udp_stat.udps_badsum++;
 171                 goto bad;
 172         }
 173
 174         if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
 175                 struct  inpcb *last, *marker;
 176
 177                 /*
 178                  * Deliver a multicast datagram to all sockets
 179                  * for which the local and remote addresses and ports match
 180                  * those of the incoming datagram.  This allows more than
 181                  * one process to receive multicasts on the same port.
 182                  * (This really ought to be done for unicast datagrams as
 183                  * well, but that would cause problems with existing
 184                  * applications that open both address-specific sockets and
 185                  * a wildcard socket listening to the same port -- they would
 186                  * end up receiving duplicates of every unicast datagram.
 187                  * Those applications open the multiple sockets to overcome an
 188                  * inadequacy of the UDP socket interface, but for backwards
 189                  * compatibility we avoid the problem here rather than
 190                  * fixing the interface.  Maybe 4.5BSD will remedy this?)
 191                  */
 192
 193                 /*
 194                  * In a case that laddr should be set to the link-local
 195                  * address (this happens in RIPng), the multicast address
 196                  * specified in the received packet does not match with
 197                  * laddr. To cure this situation, the matching is relaxed
 198                  * if the receiving interface is the same as one specified
 199                  * in the socket and if the destination multicast address
 200                  * matches one of the multicast groups specified in the socket.
 201                  */
 202
 203                 /*
 204                  * Construct sockaddr format source address.
 205                  */
 206                 init_sin6(&udp_in6, m); /* general init */
 207                 udp_in6.sin6_port = uh->uh_sport;
 208                 /*
 209                  * KAME note: traditionally we dropped udpiphdr from mbuf here.
 210                  */
 211
 212                 /*
 213                  * Locate pcb(s) for datagram.
 214                  * (Algorithm copied from raw_intr().)
 215                  */
 216                 last = NULL;
 217
 218                 marker = in_pcbmarker();
 219
 220                 GET_PCBINFO_TOKEN(pcbinfo);
 221
 222                 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list);
 223                 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) {
 224                         LIST_REMOVE(marker, inp_list);
 225                         LIST_INSERT_AFTER(in6p, marker, inp_list);
 226
 227                         if (in6p->inp_flags & INP_PLACEMARKER)
 228                                 continue;
 229                         if (!INP_ISIPV6(in6p))
 230                                 continue;
 231                         if (in6p->in6p_lport != uh->uh_dport)
 232                                 continue;
 233                         if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
 234                                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
 235                                                         &ip6->ip6_dst) &&
 236                                     !in6_mcmatch(in6p, &ip6->ip6_dst,
 237                                                  m->m_pkthdr.rcvif))
 238                                         continue;
 239                         }
 240                         if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
 241                                 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
 242                                                         &ip6->ip6_src) ||
 243                                    in6p->in6p_fport != uh->uh_sport)
 244                                         continue;
 245                         }
 246
 247                         if (last != NULL) {
 248                                 struct mbuf *n;
 249
 250                                 n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
 251                                 if (n != NULL) {
 252                                         /*
 253                                          * KAME NOTE: do not
 254                                          * m_copym(m, offset, ...) above.
 255                                          * ssb_appendaddr() expects M_PKTHDR,
 256                                          * and m_copym() will copy M_PKTHDR
 257                                          * only if offset is 0.
 258                                          */
 259                                         so = last->in6p_socket;
 260                                         if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
 261                                             (so->so_options & SO_TIMESTAMP)) {
 262                                                 ip6_savecontrol(last, &opts,
 263                                                                 ip6, n);
 264                                         }
 265                                         m_adj(n, off + sizeof(struct udphdr));
 266                                         lwkt_gettoken(&so->so_rcv.ssb_token);
 267                                         if (ssb_appendaddr(&so->so_rcv,
 268                                                     (struct sockaddr *)&udp_in6,
 269                                                     n, opts) == 0) {
 270                                                 m_freem(n);
 271                                                 if (opts)
 272                                                         m_freem(opts);
 273                                                 udp_stat.udps_fullsock++;
 274                                                 soroverflow(so);
 275                                         } else {
 276                                                 sorwakeup(so);
 277                                         }
 278                                         lwkt_reltoken(&so->so_rcv.ssb_token);
 279                                         opts = NULL;
 280                                 }
 281                         }
 282                         last = in6p;
 283                         /*
 284                          * Don't look for additional matches if this one does
 285                          * not have either the SO_REUSEPORT or SO_REUSEADDR
 286                          * socket options set.  This heuristic avoids searching
 287                          * through all pcbs in the common case of a non-shared
 288                          * port.  It assumes that an application will never
 289                          * clear these options after setting them.
 290                          */
 291                         if ((last->in6p_socket->so_options &
 292                              (SO_REUSEPORT | SO_REUSEADDR)) == 0)
 293                                 break;
 294                 }
 295                 LIST_REMOVE(marker, inp_list);
 296
 297                 REL_PCBINFO_TOKEN(pcbinfo);
 298
 299                 if (last == NULL) {
 300                         /*
 301                          * No matching pcb found; discard datagram.
 302                          * (No need to send an ICMP Port Unreachable
 303                          * for a broadcast or multicast datgram.)
 304                          */
 305                         udp_stat.udps_noport++;
 306                         udp_stat.udps_noportmcast++;
 307                         goto bad;
 308                 }
 309                 if (last->in6p_flags & IN6P_CONTROLOPTS
 310                     || last->in6p_socket->so_options & SO_TIMESTAMP)
 311                         ip6_savecontrol(last, &opts, ip6, m);
 312
 313                 m_adj(m, off + sizeof(struct udphdr));
 314                 so = last->in6p_socket;
 315                 lwkt_gettoken(&so->so_rcv.ssb_token);
 316                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6,
 317                                    m, opts) == 0) {
 318                         udp_stat.udps_fullsock++;
 319                         soroverflow(so);
 320                         lwkt_reltoken(&so->so_rcv.ssb_token);
 321                         goto bad;
 322                 }
 323                 sorwakeup(so);
 324                 lwkt_reltoken(&so->so_rcv.ssb_token);
 325                 return IPPROTO_DONE;
 326         }
 327         /*
 328          * Locate pcb for datagram.
 329          */
 330         in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport,
 331                                   &ip6->ip6_dst, uh->uh_dport, 1,
 332                                   m->m_pkthdr.rcvif);
 333         if (in6p == NULL) {
 334                 if (log_in_vain) {
 335                         char buf[INET6_ADDRSTRLEN];
 336
 337                         strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
 338                         log(LOG_INFO,
 339                             "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
 340                             buf, ntohs(uh->uh_dport),
 341                             ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
 342                 }
 343                 udp_stat.udps_noport++;
 344                 if (m->m_flags & M_MCAST) {
 345                         kprintf("UDP6: M_MCAST is set in a unicast packet.\n");
 346                         udp_stat.udps_noportmcast++;
 347                         goto bad;
 348                 }
 349                 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
 350                 return IPPROTO_DONE;
 351         }
 352
 353         /*
 354          * Construct sockaddr format source address.
 355          * Stuff source address and datagram in user buffer.
 356          */
 357         init_sin6(&udp_in6, m); /* general init */
 358         udp_in6.sin6_port = uh->uh_sport;
 359         if (in6p->in6p_flags & IN6P_CONTROLOPTS
 360             || in6p->in6p_socket->so_options & SO_TIMESTAMP)
 361                 ip6_savecontrol(in6p, &opts, ip6, m);
 362         m_adj(m, off + sizeof(struct udphdr));
 363         so = in6p->in6p_socket;
 364         lwkt_gettoken(&so->so_rcv.ssb_token);
 365         if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6,
 366                            m, opts) == 0) {
 367                 udp_stat.udps_fullsock++;
 368                 soroverflow(so);
 369                 lwkt_reltoken(&so->so_rcv.ssb_token);
 370                 goto bad;
 371         }
 372         sorwakeup(so);
 373         lwkt_reltoken(&so->so_rcv.ssb_token);
 374         return IPPROTO_DONE;
 375 bad:
 376         if (m)
 377                 m_freem(m);
 378         if (opts)
 379                 m_freem(opts);
 380         return IPPROTO_DONE;
 381 }
 382
 383 void
 384 udp6_ctlinput(netmsg_t msg)
 385 {
 386         int cmd = msg->ctlinput.nm_cmd;
 387         struct sockaddr *sa = msg->ctlinput.nm_arg;
 388         void *d = msg->ctlinput.nm_extra;
 389         struct udphdr uh;
 390         struct ip6_hdr *ip6;
 391         struct mbuf *m;
 392         int off = 0;
 393         struct ip6ctlparam *ip6cp = NULL;
 394         const struct sockaddr_in6 *sa6_src = NULL;
 395         inp_notify_t notify = udp_notify;
 396         struct udp_portonly {
 397                 u_int16_t uh_sport;
 398                 u_int16_t uh_dport;
 399         } *uhp;
 400
 401         if (sa->sa_family != AF_INET6 ||
 402             sa->sa_len != sizeof(struct sockaddr_in6))
 403                 goto out;
 404
 405         if ((unsigned)cmd >= PRC_NCMDS)
 406                 goto out;
 407         if (PRC_IS_REDIRECT(cmd))
 408                 notify = in6_rtchange, d = NULL;
 409         else if (cmd == PRC_HOSTDEAD)
 410                 d = NULL;
 411         else if (inet6ctlerrmap[cmd] == 0)
 412                 goto out;
 413
 414         /* if the parameter is from icmp6, decode it. */
 415         if (d != NULL) {
 416                 ip6cp = (struct ip6ctlparam *)d;
 417                 m = ip6cp->ip6c_m;
 418                 ip6 = ip6cp->ip6c_ip6;
 419                 off = ip6cp->ip6c_off;
 420                 sa6_src = ip6cp->ip6c_src;
 421         } else {
 422                 m = NULL;
 423                 ip6 = NULL;
 424                 sa6_src = &sa6_any;
 425         }
 426
 427         if (ip6) {
 428                 /*
 429                  * XXX: We assume that when IPV6 is non NULL,
 430                  * M and OFF are valid.
 431                  */
 432
 433                 /* check if we can safely examine src and dst ports */
 434                 if (m->m_pkthdr.len < off + sizeof(*uhp))
 435                         return;
 436
 437                 bzero(&uh, sizeof(uh));
 438                 m_copydata(m, off, sizeof(*uhp), &uh);
 439
 440                 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport,
 441                               (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport,
 442                               cmd, 0, notify);
 443         } else {
 444                 in6_pcbnotify(&udbinfo[0], sa, 0,
 445                               (const struct sockaddr *)sa6_src, 0,
 446                               cmd, 0, notify);
 447         }
 448 out:
 449         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
 450 }
 451
 452 static int
 453 udp6_getcred(SYSCTL_HANDLER_ARGS)
 454 {
 455         struct sockaddr_in6 addrs[2];
 456         struct inpcb *inp;
 457         int error;
 458
 459         error = caps_priv_check_td(req->td, SYSCAP_RESTRICTEDROOT);
 460         if (error)
 461                 return (error);
 462
 463         if (req->newlen != sizeof(addrs))
 464                 return (EINVAL);
 465         if (req->oldlen != sizeof(struct ucred))
 466                 return (EINVAL);
 467         error = SYSCTL_IN(req, addrs, sizeof(addrs));
 468         if (error)
 469                 return (error);
 470         crit_enter();
 471         inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr,
 472                                  addrs[1].sin6_port,
 473                                  &addrs[0].sin6_addr, addrs[0].sin6_port,
 474                                  1, NULL);
 475         if (!inp || !inp->inp_socket) {
 476                 error = ENOENT;
 477                 goto out;
 478         }
 479         error = SYSCTL_OUT(req, inp->inp_socket->so_cred,
 480                            sizeof(struct ucred));
 481
 482 out:
 483         crit_exit();
 484         return (error);
 485 }
 486
 487 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
 488             0, 0,
 489             udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
 490
 491 /*
 492  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
 493  *       will sofree() it when we return.
 494  */
 495 static void
 496 udp6_abort(netmsg_t msg)
 497 {
 498         struct socket *so = msg->abort.base.nm_so;
 499         struct inpcb *inp;
 500         int error;
 501
 502         inp = so->so_pcb;
 503         if (inp) {
 504                 soisdisconnected(so);
 505
 506                 in6_pcbdetach(inp);
 507                 error = 0;
 508         } else {
 509                 error = EINVAL;
 510         }
 511         lwkt_replymsg(&msg->abort.base.lmsg, error);
 512 }
 513
 514 static void
 515 udp6_attach(netmsg_t msg)
 516 {
 517         struct socket *so = msg->attach.base.nm_so;
 518         struct pru_attach_info *ai = msg->attach.nm_ai;
 519         struct inpcb *inp;
 520         int error;
 521
 522         inp = so->so_pcb;
 523         if (inp != NULL) {
 524                 error = EINVAL;
 525                 goto out;
 526         }
 527
 528         if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) {
 529                 error = soreserve(so, udp_sendspace, udp_recvspace,
 530                     ai->sb_rlimit);
 531                 if (error)
 532                         goto out;
 533         }
 534
 535         error = in_pcballoc(so, &udbinfo[0]);
 536         if (error)
 537                 goto out;
 538
 539         inp = (struct inpcb *)so->so_pcb;
 540         inp->in6p_hops = -1;    /* use kernel default */
 541         inp->in6p_cksum = -1;   /* just to be sure */
 542         /*
 543          * XXX: ugly!!
 544          * IPv4 TTL initialization is necessary for an IPv6 socket as well,
 545          * because the socket may be bound to an IPv6 wildcard address,
 546          * which may match an IPv4-mapped IPv6 address.
 547          */
 548         inp->inp_ip_ttl = ip_defttl;
 549         error = 0;
 550 out:
 551         lwkt_replymsg(&msg->attach.base.lmsg, error);
 552 }
 553
 554 static void
 555 udp6_bind(netmsg_t msg)
 556 {
 557         struct socket *so =msg->bind.base.nm_so;
 558         struct sockaddr *nam = msg->bind.nm_nam;
 559         struct thread *td = msg->bind.nm_td;
 560         struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam;
 561         struct inpcb *inp;
 562         int error;
 563
 564         inp = so->so_pcb;
 565         if (inp == NULL) {
 566                 error = EINVAL;
 567                 goto out;
 568         }
 569
 570         error = in6_pcbbind(inp, nam, td);
 571         if (error == 0) {
 572                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
 573                         inp->inp_flags |= INP_WASBOUND_NOTANY;
 574                 in_pcbinswildcardhash(inp);
 575         }
 576 out:
 577         lwkt_replymsg(&msg->bind.base.lmsg, error);
 578 }
 579
 580 static void
 581 udp6_connect(netmsg_t msg)
 582 {
 583         struct socket *so = msg->connect.base.nm_so;
 584         struct sockaddr *nam = msg->connect.nm_nam;
 585         struct thread *td = msg->connect.nm_td;
 586         struct sockaddr_in6 *sin6_p;
 587         struct inpcb *inp;
 588         int error;
 589
 590         inp = so->so_pcb;
 591         if (inp == NULL) {
 592                 error = EINVAL;
 593                 goto out;
 594         }
 595
 596         sin6_p = (struct sockaddr_in6 *)nam;
 597         if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
 598                 error = EADDRNOTAVAIL;
 599                 goto out;
 600         }
 601
 602         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
 603                 error = EISCONN;
 604                 goto out;
 605         }
 606         if (inp->inp_flags & INP_WILDCARD)
 607                 in_pcbremwildcardhash(inp);
 608         error = in6_pcbconnect(inp, nam, td);
 609         if (error == 0) {
 610                 soisconnected(so);
 611         } else if (error == EAFNOSUPPORT) {     /* connection dissolved */
 612                 /*
 613                  * Follow traditional BSD behavior and retain
 614                  * the local port binding.  But, fix the old misbehavior
 615                  * of overwriting any previously bound local address.
 616                  */
 617                 if (!(inp->inp_flags & INP_WASBOUND_NOTANY))
 618                         inp->in6p_laddr = kin6addr_any;
 619                 in_pcbinswildcardhash(inp);
 620         }
 621 out:
 622         lwkt_replymsg(&msg->connect.base.lmsg, error);
 623 }
 624
 625 static void
 626 udp6_detach(netmsg_t msg)
 627 {
 628         struct socket *so = msg->detach.base.nm_so;
 629         struct inpcb *inp;
 630         int error;
 631
 632         inp = so->so_pcb;
 633         if (inp) {
 634                 in6_pcbdetach(inp);
 635                 error = 0;
 636         } else {
 637                 error = EINVAL;
 638         }
 639         lwkt_replymsg(&msg->detach.base.lmsg, error);
 640 }
 641
 642 static void
 643 udp6_disconnect(netmsg_t msg)
 644 {
 645         struct socket *so = msg->disconnect.base.nm_so;
 646         struct inpcb *inp;
 647         int error;
 648
 649         inp = so->so_pcb;
 650         if (inp == NULL) {
 651                 error = EINVAL;
 652                 goto out;
 653         }
 654
 655         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
 656                 error = ENOTCONN;
 657         } else {
 658                 in6_pcbdisconnect(inp);
 659                 soclrstate(so, SS_ISCONNECTED);         /* XXX */
 660                 error = 0;
 661         }
 662 out:
 663         lwkt_replymsg(&msg->disconnect.base.lmsg, error);
 664 }
 665
 666 static void
 667 udp6_send(netmsg_t msg)
 668 {
 669         struct socket *so = msg->send.base.nm_so;
 670         struct mbuf *m = msg->send.nm_m;
 671         struct sockaddr *addr = msg->send.nm_addr;
 672         struct mbuf *control = msg->send.nm_control;
 673         struct thread *td = msg->send.nm_td;
 674         struct inpcb *inp;
 675         int error = 0;
 676
 677         inp = so->so_pcb;
 678         if (inp == NULL) {
 679                 error = EINVAL;
 680                 goto bad;
 681         }
 682
 683         if (addr) {
 684                 struct sockaddr_in6 *sin6;
 685
 686                 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 687                         error = EINVAL;
 688                         goto bad;
 689                 }
 690                 if (addr->sa_family != AF_INET6) {
 691                         error = EAFNOSUPPORT;
 692                         goto bad;
 693                 }
 694
 695                 sin6 = (struct sockaddr_in6 *)addr;
 696                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 697                         error = EADDRNOTAVAIL;
 698                         goto bad;
 699                 }
 700         }
 701
 702         error = udp6_output(inp, m, addr, control, td);
 703         lwkt_replymsg(&msg->send.base.lmsg, error);
 704         return;
 705 bad:
 706         m_freem(m);
 707         lwkt_replymsg(&msg->send.base.lmsg, error);
 708 }
 709
 710 struct pr_usrreqs udp6_usrreqs = {
 711         .pru_abort = udp6_abort,
 712         .pru_accept = pr_generic_notsupp,
 713         .pru_attach = udp6_attach,
 714         .pru_bind = udp6_bind,
 715         .pru_connect = udp6_connect,
 716         .pru_connect2 = pr_generic_notsupp,
 717         .pru_control = in6_control_dispatch,
 718         .pru_detach = udp6_detach,
 719         .pru_disconnect = udp6_disconnect,
 720         .pru_listen = pr_generic_notsupp,
 721         .pru_peeraddr = in6_setpeeraddr_dispatch,
 722         .pru_rcvd = pr_generic_notsupp,
 723         .pru_rcvoob = pr_generic_notsupp,
 724         .pru_send = udp6_send,
 725         .pru_sense = pru_sense_null,
 726         .pru_shutdown = udp_shutdown,
 727         .pru_sockaddr = in6_setsockaddr_dispatch,
 728         .pru_sosend = sosend,
 729         .pru_soreceive = soreceive
 730 };
 731