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