The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/udp6_usrreq.c

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    1 /*-
    2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    3  * Copyright (c) 2010-2011 Juniper Networks, Inc.
    4  * All rights reserved.
    5  *
    6  * Portions of this software were developed by Robert N. M. Watson under
    7  * contract to Juniper Networks, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. Neither the name of the project nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $
   34  *      $KAME: udp6_output.c,v 1.31 2001/05/21 16:39:15 jinmei Exp $
   35  */
   36 
   37 /*-
   38  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
   39  *      The Regents of the University of California.
   40  * All rights reserved.
   41  *
   42  * Redistribution and use in source and binary forms, with or without
   43  * modification, are permitted provided that the following conditions
   44  * are met:
   45  * 1. Redistributions of source code must retain the above copyright
   46  *    notice, this list of conditions and the following disclaimer.
   47  * 2. Redistributions in binary form must reproduce the above copyright
   48  *    notice, this list of conditions and the following disclaimer in the
   49  *    documentation and/or other materials provided with the distribution.
   50  * 4. Neither the name of the University nor the names of its contributors
   51  *    may be used to endorse or promote products derived from this software
   52  *    without specific prior written permission.
   53  *
   54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   64  * SUCH DAMAGE.
   65  *
   66  *      @(#)udp_usrreq.c        8.6 (Berkeley) 5/23/95
   67  */
   68 
   69 #include <sys/cdefs.h>
   70 __FBSDID("$FreeBSD: stable/9/sys/netinet6/udp6_usrreq.c 252692 2013-07-04 08:57:13Z ae $");
   71 
   72 #include "opt_inet.h"
   73 #include "opt_inet6.h"
   74 #include "opt_ipfw.h"
   75 #include "opt_ipsec.h"
   76 
   77 #include <sys/param.h>
   78 #include <sys/jail.h>
   79 #include <sys/kernel.h>
   80 #include <sys/lock.h>
   81 #include <sys/mbuf.h>
   82 #include <sys/priv.h>
   83 #include <sys/proc.h>
   84 #include <sys/protosw.h>
   85 #include <sys/signalvar.h>
   86 #include <sys/socket.h>
   87 #include <sys/socketvar.h>
   88 #include <sys/sx.h>
   89 #include <sys/sysctl.h>
   90 #include <sys/syslog.h>
   91 #include <sys/systm.h>
   92 
   93 #include <net/if.h>
   94 #include <net/if_types.h>
   95 #include <net/route.h>
   96 
   97 #include <netinet/in.h>
   98 #include <netinet/in_pcb.h>
   99 #include <netinet/in_systm.h>
  100 #include <netinet/in_var.h>
  101 #include <netinet/ip.h>
  102 #include <netinet/ip_icmp.h>
  103 #include <netinet/ip6.h>
  104 #include <netinet/icmp_var.h>
  105 #include <netinet/icmp6.h>
  106 #include <netinet/ip_var.h>
  107 #include <netinet/udp.h>
  108 #include <netinet/udp_var.h>
  109 
  110 #include <netinet6/ip6protosw.h>
  111 #include <netinet6/ip6_var.h>
  112 #include <netinet6/in6_pcb.h>
  113 #include <netinet6/udp6_var.h>
  114 #include <netinet6/scope6_var.h>
  115 
  116 #ifdef IPSEC
  117 #include <netipsec/ipsec.h>
  118 #include <netipsec/ipsec6.h>
  119 #endif /* IPSEC */
  120 
  121 #include <security/mac/mac_framework.h>
  122 
  123 /*
  124  * UDP protocol implementation.
  125  * Per RFC 768, August, 1980.
  126  */
  127 
  128 extern struct protosw   inetsw[];
  129 static void             udp6_detach(struct socket *so);
  130 
  131 static void
  132 udp6_append(struct inpcb *inp, struct mbuf *n, int off,
  133     struct sockaddr_in6 *fromsa)
  134 {
  135         struct socket *so;
  136         struct mbuf *opts;
  137 
  138         INP_LOCK_ASSERT(inp);
  139 
  140 #ifdef IPSEC
  141         /* Check AH/ESP integrity. */
  142         if (ipsec6_in_reject(n, inp)) {
  143                 m_freem(n);
  144                 IPSEC6STAT_INC(in_polvio);
  145                 return;
  146         }
  147 #endif /* IPSEC */
  148 #ifdef MAC
  149         if (mac_inpcb_check_deliver(inp, n) != 0) {
  150                 m_freem(n);
  151                 return;
  152         }
  153 #endif
  154         opts = NULL;
  155         if (inp->inp_flags & INP_CONTROLOPTS ||
  156             inp->inp_socket->so_options & SO_TIMESTAMP)
  157                 ip6_savecontrol(inp, n, &opts);
  158         m_adj(n, off + sizeof(struct udphdr));
  159 
  160         so = inp->inp_socket;
  161         SOCKBUF_LOCK(&so->so_rcv);
  162         if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n,
  163             opts) == 0) {
  164                 SOCKBUF_UNLOCK(&so->so_rcv);
  165                 m_freem(n);
  166                 if (opts)
  167                         m_freem(opts);
  168                 UDPSTAT_INC(udps_fullsock);
  169         } else
  170                 sorwakeup_locked(so);
  171 }
  172 
  173 int
  174 udp6_input(struct mbuf **mp, int *offp, int proto)
  175 {
  176         struct mbuf *m = *mp;
  177         struct ifnet *ifp;
  178         struct ip6_hdr *ip6;
  179         struct udphdr *uh;
  180         struct inpcb *inp;
  181         struct udpcb *up;
  182         int off = *offp;
  183         int plen, ulen;
  184         struct sockaddr_in6 fromsa;
  185         struct m_tag *fwd_tag;
  186         uint16_t uh_sum;
  187 
  188         ifp = m->m_pkthdr.rcvif;
  189         ip6 = mtod(m, struct ip6_hdr *);
  190 
  191         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
  192                 /* XXX send icmp6 host/port unreach? */
  193                 m_freem(m);
  194                 return (IPPROTO_DONE);
  195         }
  196 
  197 #ifndef PULLDOWN_TEST
  198         IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
  199         ip6 = mtod(m, struct ip6_hdr *);
  200         uh = (struct udphdr *)((caddr_t)ip6 + off);
  201 #else
  202         IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
  203         if (!uh)
  204                 return (IPPROTO_DONE);
  205 #endif
  206 
  207         UDPSTAT_INC(udps_ipackets);
  208 
  209         /*
  210          * Destination port of 0 is illegal, based on RFC768.
  211          */
  212         if (uh->uh_dport == 0)
  213                 goto badunlocked;
  214 
  215         plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
  216         ulen = ntohs((u_short)uh->uh_ulen);
  217 
  218         if (plen != ulen) {
  219                 UDPSTAT_INC(udps_badlen);
  220                 goto badunlocked;
  221         }
  222 
  223         /*
  224          * Checksum extended UDP header and data.
  225          */
  226         if (uh->uh_sum == 0) {
  227                 UDPSTAT_INC(udps_nosum);
  228                 goto badunlocked;
  229         }
  230 
  231         if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) {
  232                 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
  233                         uh_sum = m->m_pkthdr.csum_data;
  234                 else
  235                         uh_sum = in6_cksum_pseudo(ip6, ulen,
  236                             IPPROTO_UDP, m->m_pkthdr.csum_data);
  237                 uh_sum ^= 0xffff;
  238         } else
  239                 uh_sum = in6_cksum(m, IPPROTO_UDP, off, ulen);
  240 
  241         if (uh_sum != 0) {
  242                 UDPSTAT_INC(udps_badsum);
  243                 goto badunlocked;
  244         }
  245 
  246         /*
  247          * Construct sockaddr format source address.
  248          */
  249         init_sin6(&fromsa, m);
  250         fromsa.sin6_port = uh->uh_sport;
  251 
  252         if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
  253                 struct inpcb *last;
  254                 struct ip6_moptions *imo;
  255 
  256                 INP_INFO_RLOCK(&V_udbinfo);
  257                 /*
  258                  * In the event that laddr should be set to the link-local
  259                  * address (this happens in RIPng), the multicast address
  260                  * specified in the received packet will not match laddr.  To
  261                  * handle this situation, matching is relaxed if the
  262                  * receiving interface is the same as one specified in the
  263                  * socket and if the destination multicast address matches
  264                  * one of the multicast groups specified in the socket.
  265                  */
  266 
  267                 /*
  268                  * KAME note: traditionally we dropped udpiphdr from mbuf
  269                  * here.  We need udphdr for IPsec processing so we do that
  270                  * later.
  271                  */
  272                 last = NULL;
  273                 LIST_FOREACH(inp, &V_udb, inp_list) {
  274                         if ((inp->inp_vflag & INP_IPV6) == 0)
  275                                 continue;
  276                         if (inp->inp_lport != uh->uh_dport)
  277                                 continue;
  278                         if (inp->inp_fport != 0 &&
  279                             inp->inp_fport != uh->uh_sport)
  280                                 continue;
  281                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
  282                                 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
  283                                                         &ip6->ip6_dst))
  284                                         continue;
  285                         }
  286                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
  287                                 if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
  288                                                         &ip6->ip6_src) ||
  289                                     inp->inp_fport != uh->uh_sport)
  290                                         continue;
  291                         }
  292 
  293                         /*
  294                          * XXXRW: Because we weren't holding either the inpcb
  295                          * or the hash lock when we checked for a match 
  296                          * before, we should probably recheck now that the 
  297                          * inpcb lock is (supposed to be) held.
  298                          */
  299 
  300                         /*
  301                          * Handle socket delivery policy for any-source
  302                          * and source-specific multicast. [RFC3678]
  303                          */
  304                         imo = inp->in6p_moptions;
  305                         if (imo && IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
  306                                 struct sockaddr_in6      mcaddr;
  307                                 int                      blocked;
  308 
  309                                 INP_RLOCK(inp);
  310 
  311                                 bzero(&mcaddr, sizeof(struct sockaddr_in6));
  312                                 mcaddr.sin6_len = sizeof(struct sockaddr_in6);
  313                                 mcaddr.sin6_family = AF_INET6;
  314                                 mcaddr.sin6_addr = ip6->ip6_dst;
  315 
  316                                 blocked = im6o_mc_filter(imo, ifp,
  317                                         (struct sockaddr *)&mcaddr,
  318                                         (struct sockaddr *)&fromsa);
  319                                 if (blocked != MCAST_PASS) {
  320                                         if (blocked == MCAST_NOTGMEMBER)
  321                                                 IP6STAT_INC(ip6s_notmember);
  322                                         if (blocked == MCAST_NOTSMEMBER ||
  323                                             blocked == MCAST_MUTED)
  324                                                 UDPSTAT_INC(udps_filtermcast);
  325                                         INP_RUNLOCK(inp); /* XXX */
  326                                         continue;
  327                                 }
  328 
  329                                 INP_RUNLOCK(inp);
  330                         }
  331                         if (last != NULL) {
  332                                 struct mbuf *n;
  333 
  334                                 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
  335                                         INP_RLOCK(last);
  336                                         up = intoudpcb(last);
  337                                         if (up->u_tun_func == NULL) {
  338                                                 udp6_append(last, n, off, &fromsa);
  339                                         } else {
  340                                                 /*
  341                                                  * Engage the tunneling
  342                                                  * protocol we will have to
  343                                                  * leave the info_lock up,
  344                                                  * since we are hunting
  345                                                  * through multiple UDP's.
  346                                                  * 
  347                                                  */
  348                                                 (*up->u_tun_func)(n, off, last);
  349                                         }
  350                                         INP_RUNLOCK(last);
  351                                 }
  352                         }
  353                         last = inp;
  354                         /*
  355                          * Don't look for additional matches if this one does
  356                          * not have either the SO_REUSEPORT or SO_REUSEADDR
  357                          * socket options set.  This heuristic avoids
  358                          * searching through all pcbs in the common case of a
  359                          * non-shared port.  It assumes that an application
  360                          * will never clear these options after setting them.
  361                          */
  362                         if ((last->inp_socket->so_options &
  363                              (SO_REUSEPORT|SO_REUSEADDR)) == 0)
  364                                 break;
  365                 }
  366 
  367                 if (last == NULL) {
  368                         /*
  369                          * No matching pcb found; discard datagram.  (No need
  370                          * to send an ICMP Port Unreachable for a broadcast
  371                          * or multicast datgram.)
  372                          */
  373                         UDPSTAT_INC(udps_noport);
  374                         UDPSTAT_INC(udps_noportmcast);
  375                         goto badheadlocked;
  376                 }
  377                 INP_RLOCK(last);
  378                 INP_INFO_RUNLOCK(&V_udbinfo);
  379                 up = intoudpcb(last);
  380                 if (up->u_tun_func == NULL) {
  381                         udp6_append(last, m, off, &fromsa);
  382                 } else {
  383                         /*
  384                          * Engage the tunneling protocol.
  385                          */
  386                         (*up->u_tun_func)(m, off, last);
  387                 }
  388                 INP_RUNLOCK(last);
  389                 return (IPPROTO_DONE);
  390         }
  391         /*
  392          * Locate pcb for datagram.
  393          */
  394 
  395         /*
  396          * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
  397          */
  398         if ((m->m_flags & M_IP6_NEXTHOP) &&
  399             (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
  400                 struct sockaddr_in6 *next_hop6;
  401 
  402                 next_hop6 = (struct sockaddr_in6 *)(fwd_tag + 1);
  403 
  404                 /*
  405                  * Transparently forwarded. Pretend to be the destination.
  406                  * Already got one like this?
  407                  */
  408                 inp = in6_pcblookup_mbuf(&V_udbinfo,
  409                     &ip6->ip6_src, uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
  410                     INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m);
  411                 if (!inp) {
  412                         /*
  413                          * It's new.  Try to find the ambushing socket.
  414                          * Because we've rewritten the destination address,
  415                          * any hardware-generated hash is ignored.
  416                          */
  417                         inp = in6_pcblookup(&V_udbinfo, &ip6->ip6_src,
  418                             uh->uh_sport, &next_hop6->sin6_addr,
  419                             next_hop6->sin6_port ? htons(next_hop6->sin6_port) :
  420                             uh->uh_dport, INPLOOKUP_WILDCARD |
  421                             INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif);
  422                 }
  423                 /* Remove the tag from the packet. We don't need it anymore. */
  424                 m_tag_delete(m, fwd_tag);
  425                 m->m_flags &= ~M_IP6_NEXTHOP;
  426         } else
  427                 inp = in6_pcblookup_mbuf(&V_udbinfo, &ip6->ip6_src,
  428                     uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
  429                     INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
  430                     m->m_pkthdr.rcvif, m);
  431         if (inp == NULL) {
  432                 if (udp_log_in_vain) {
  433                         char ip6bufs[INET6_ADDRSTRLEN];
  434                         char ip6bufd[INET6_ADDRSTRLEN];
  435 
  436                         log(LOG_INFO,
  437                             "Connection attempt to UDP [%s]:%d from [%s]:%d\n",
  438                             ip6_sprintf(ip6bufd, &ip6->ip6_dst),
  439                             ntohs(uh->uh_dport),
  440                             ip6_sprintf(ip6bufs, &ip6->ip6_src),
  441                             ntohs(uh->uh_sport));
  442                 }
  443                 UDPSTAT_INC(udps_noport);
  444                 if (m->m_flags & M_MCAST) {
  445                         printf("UDP6: M_MCAST is set in a unicast packet.\n");
  446                         UDPSTAT_INC(udps_noportmcast);
  447                         goto badunlocked;
  448                 }
  449                 if (V_udp_blackhole)
  450                         goto badunlocked;
  451                 if (badport_bandlim(BANDLIM_ICMP6_UNREACH) < 0)
  452                         goto badunlocked;
  453                 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
  454                 return (IPPROTO_DONE);
  455         }
  456         INP_RLOCK_ASSERT(inp);
  457         up = intoudpcb(inp);
  458         if (up->u_tun_func == NULL) {
  459                 udp6_append(inp, m, off, &fromsa);
  460         } else {
  461                 /*
  462                  * Engage the tunneling protocol.
  463                  */
  464 
  465                 (*up->u_tun_func)(m, off, inp);
  466         }
  467         INP_RUNLOCK(inp);
  468         return (IPPROTO_DONE);
  469 
  470 badheadlocked:
  471         INP_INFO_RUNLOCK(&V_udbinfo);
  472 badunlocked:
  473         if (m)
  474                 m_freem(m);
  475         return (IPPROTO_DONE);
  476 }
  477 
  478 void
  479 udp6_ctlinput(int cmd, struct sockaddr *sa, void *d)
  480 {
  481         struct udphdr uh;
  482         struct ip6_hdr *ip6;
  483         struct mbuf *m;
  484         int off = 0;
  485         struct ip6ctlparam *ip6cp = NULL;
  486         const struct sockaddr_in6 *sa6_src = NULL;
  487         void *cmdarg;
  488         struct inpcb *(*notify)(struct inpcb *, int) = udp_notify;
  489         struct udp_portonly {
  490                 u_int16_t uh_sport;
  491                 u_int16_t uh_dport;
  492         } *uhp;
  493 
  494         if (sa->sa_family != AF_INET6 ||
  495             sa->sa_len != sizeof(struct sockaddr_in6))
  496                 return;
  497 
  498         if ((unsigned)cmd >= PRC_NCMDS)
  499                 return;
  500         if (PRC_IS_REDIRECT(cmd))
  501                 notify = in6_rtchange, d = NULL;
  502         else if (cmd == PRC_HOSTDEAD)
  503                 d = NULL;
  504         else if (inet6ctlerrmap[cmd] == 0)
  505                 return;
  506 
  507         /* if the parameter is from icmp6, decode it. */
  508         if (d != NULL) {
  509                 ip6cp = (struct ip6ctlparam *)d;
  510                 m = ip6cp->ip6c_m;
  511                 ip6 = ip6cp->ip6c_ip6;
  512                 off = ip6cp->ip6c_off;
  513                 cmdarg = ip6cp->ip6c_cmdarg;
  514                 sa6_src = ip6cp->ip6c_src;
  515         } else {
  516                 m = NULL;
  517                 ip6 = NULL;
  518                 cmdarg = NULL;
  519                 sa6_src = &sa6_any;
  520         }
  521 
  522         if (ip6) {
  523                 /*
  524                  * XXX: We assume that when IPV6 is non NULL,
  525                  * M and OFF are valid.
  526                  */
  527 
  528                 /* Check if we can safely examine src and dst ports. */
  529                 if (m->m_pkthdr.len < off + sizeof(*uhp))
  530                         return;
  531 
  532                 bzero(&uh, sizeof(uh));
  533                 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
  534 
  535                 (void) in6_pcbnotify(&V_udbinfo, sa, uh.uh_dport,
  536                     (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, cmd,
  537                     cmdarg, notify);
  538         } else
  539                 (void) in6_pcbnotify(&V_udbinfo, sa, 0,
  540                     (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
  541 }
  542 
  543 static int
  544 udp6_getcred(SYSCTL_HANDLER_ARGS)
  545 {
  546         struct xucred xuc;
  547         struct sockaddr_in6 addrs[2];
  548         struct inpcb *inp;
  549         int error;
  550 
  551         error = priv_check(req->td, PRIV_NETINET_GETCRED);
  552         if (error)
  553                 return (error);
  554 
  555         if (req->newlen != sizeof(addrs))
  556                 return (EINVAL);
  557         if (req->oldlen != sizeof(struct xucred))
  558                 return (EINVAL);
  559         error = SYSCTL_IN(req, addrs, sizeof(addrs));
  560         if (error)
  561                 return (error);
  562         if ((error = sa6_embedscope(&addrs[0], V_ip6_use_defzone)) != 0 ||
  563             (error = sa6_embedscope(&addrs[1], V_ip6_use_defzone)) != 0) {
  564                 return (error);
  565         }
  566         inp = in6_pcblookup(&V_udbinfo, &addrs[1].sin6_addr,
  567             addrs[1].sin6_port, &addrs[0].sin6_addr, addrs[0].sin6_port,
  568             INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB, NULL);
  569         if (inp != NULL) {
  570                 INP_RLOCK_ASSERT(inp);
  571                 if (inp->inp_socket == NULL)
  572                         error = ENOENT;
  573                 if (error == 0)
  574                         error = cr_canseesocket(req->td->td_ucred,
  575                             inp->inp_socket);
  576                 if (error == 0)
  577                         cru2x(inp->inp_cred, &xuc);
  578                 INP_RUNLOCK(inp);
  579         } else
  580                 error = ENOENT;
  581         if (error == 0)
  582                 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
  583         return (error);
  584 }
  585 
  586 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 0,
  587     0, udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection");
  588 
  589 static int
  590 udp6_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr6,
  591     struct mbuf *control, struct thread *td)
  592 {
  593         u_int32_t ulen = m->m_pkthdr.len;
  594         u_int32_t plen = sizeof(struct udphdr) + ulen;
  595         struct ip6_hdr *ip6;
  596         struct udphdr *udp6;
  597         struct in6_addr *laddr, *faddr, in6a;
  598         struct sockaddr_in6 *sin6 = NULL;
  599         struct ifnet *oifp = NULL;
  600         int scope_ambiguous = 0;
  601         u_short fport;
  602         int error = 0;
  603         struct ip6_pktopts *optp, opt;
  604         int af = AF_INET6, hlen = sizeof(struct ip6_hdr);
  605         int flags;
  606         struct sockaddr_in6 tmp;
  607 
  608         INP_WLOCK_ASSERT(inp);
  609         INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
  610 
  611         if (addr6) {
  612                 /* addr6 has been validated in udp6_send(). */
  613                 sin6 = (struct sockaddr_in6 *)addr6;
  614 
  615                 /* protect *sin6 from overwrites */
  616                 tmp = *sin6;
  617                 sin6 = &tmp;
  618 
  619                 /*
  620                  * Application should provide a proper zone ID or the use of
  621                  * default zone IDs should be enabled.  Unfortunately, some
  622                  * applications do not behave as it should, so we need a
  623                  * workaround.  Even if an appropriate ID is not determined,
  624                  * we'll see if we can determine the outgoing interface.  If we
  625                  * can, determine the zone ID based on the interface below.
  626                  */
  627                 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone)
  628                         scope_ambiguous = 1;
  629                 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0)
  630                         return (error);
  631         }
  632 
  633         if (control) {
  634                 if ((error = ip6_setpktopts(control, &opt,
  635                     inp->in6p_outputopts, td->td_ucred, IPPROTO_UDP)) != 0)
  636                         goto release;
  637                 optp = &opt;
  638         } else
  639                 optp = inp->in6p_outputopts;
  640 
  641         if (sin6) {
  642                 faddr = &sin6->sin6_addr;
  643 
  644                 /*
  645                  * IPv4 version of udp_output calls in_pcbconnect in this case,
  646                  * which needs splnet and affects performance.
  647                  * Since we saw no essential reason for calling in_pcbconnect,
  648                  * we get rid of such kind of logic, and call in6_selectsrc
  649                  * and in6_pcbsetport in order to fill in the local address
  650                  * and the local port.
  651                  */
  652                 if (sin6->sin6_port == 0) {
  653                         error = EADDRNOTAVAIL;
  654                         goto release;
  655                 }
  656 
  657                 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
  658                         /* how about ::ffff:0.0.0.0 case? */
  659                         error = EISCONN;
  660                         goto release;
  661                 }
  662 
  663                 fport = sin6->sin6_port; /* allow 0 port */
  664 
  665                 if (IN6_IS_ADDR_V4MAPPED(faddr)) {
  666                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
  667                                 /*
  668                                  * I believe we should explicitly discard the
  669                                  * packet when mapped addresses are disabled,
  670                                  * rather than send the packet as an IPv6 one.
  671                                  * If we chose the latter approach, the packet
  672                                  * might be sent out on the wire based on the
  673                                  * default route, the situation which we'd
  674                                  * probably want to avoid.
  675                                  * (20010421 jinmei@kame.net)
  676                                  */
  677                                 error = EINVAL;
  678                                 goto release;
  679                         }
  680                         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
  681                             !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) {
  682                                 /*
  683                                  * when remote addr is an IPv4-mapped address,
  684                                  * local addr should not be an IPv6 address,
  685                                  * since you cannot determine how to map IPv6
  686                                  * source address to IPv4.
  687                                  */
  688                                 error = EINVAL;
  689                                 goto release;
  690                         }
  691 
  692                         af = AF_INET;
  693                 }
  694 
  695                 if (!IN6_IS_ADDR_V4MAPPED(faddr)) {
  696                         error = in6_selectsrc(sin6, optp, inp, NULL,
  697                             td->td_ucred, &oifp, &in6a);
  698                         if (error)
  699                                 goto release;
  700                         if (oifp && scope_ambiguous &&
  701                             (error = in6_setscope(&sin6->sin6_addr,
  702                             oifp, NULL))) {
  703                                 goto release;
  704                         }
  705                         laddr = &in6a;
  706                 } else
  707                         laddr = &inp->in6p_laddr;       /* XXX */
  708                 if (laddr == NULL) {
  709                         if (error == 0)
  710                                 error = EADDRNOTAVAIL;
  711                         goto release;
  712                 }
  713                 if (inp->inp_lport == 0 &&
  714                     (error = in6_pcbsetport(laddr, inp, td->td_ucred)) != 0) {
  715                         /* Undo an address bind that may have occurred. */
  716                         inp->in6p_laddr = in6addr_any;
  717                         goto release;
  718                 }
  719         } else {
  720                 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
  721                         error = ENOTCONN;
  722                         goto release;
  723                 }
  724                 if (IN6_IS_ADDR_V4MAPPED(&inp->in6p_faddr)) {
  725                         if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
  726                                 /*
  727                                  * XXX: this case would happen when the
  728                                  * application sets the V6ONLY flag after
  729                                  * connecting the foreign address.
  730                                  * Such applications should be fixed,
  731                                  * so we bark here.
  732                                  */
  733                                 log(LOG_INFO, "udp6_output: IPV6_V6ONLY "
  734                                     "option was set for a connected socket\n");
  735                                 error = EINVAL;
  736                                 goto release;
  737                         } else
  738                                 af = AF_INET;
  739                 }
  740                 laddr = &inp->in6p_laddr;
  741                 faddr = &inp->in6p_faddr;
  742                 fport = inp->inp_fport;
  743         }
  744 
  745         if (af == AF_INET)
  746                 hlen = sizeof(struct ip);
  747 
  748         /*
  749          * Calculate data length and get a mbuf
  750          * for UDP and IP6 headers.
  751          */
  752         M_PREPEND(m, hlen + sizeof(struct udphdr), M_DONTWAIT);
  753         if (m == 0) {
  754                 error = ENOBUFS;
  755                 goto release;
  756         }
  757 
  758         /*
  759          * Stuff checksum and output datagram.
  760          */
  761         udp6 = (struct udphdr *)(mtod(m, caddr_t) + hlen);
  762         udp6->uh_sport = inp->inp_lport; /* lport is always set in the PCB */
  763         udp6->uh_dport = fport;
  764         if (plen <= 0xffff)
  765                 udp6->uh_ulen = htons((u_short)plen);
  766         else
  767                 udp6->uh_ulen = 0;
  768         udp6->uh_sum = 0;
  769 
  770         switch (af) {
  771         case AF_INET6:
  772                 ip6 = mtod(m, struct ip6_hdr *);
  773                 ip6->ip6_flow   = inp->inp_flow & IPV6_FLOWINFO_MASK;
  774                 ip6->ip6_vfc    &= ~IPV6_VERSION_MASK;
  775                 ip6->ip6_vfc    |= IPV6_VERSION;
  776 #if 0                           /* ip6_plen will be filled in ip6_output. */
  777                 ip6->ip6_plen   = htons((u_short)plen);
  778 #endif
  779                 ip6->ip6_nxt    = IPPROTO_UDP;
  780                 ip6->ip6_hlim   = in6_selecthlim(inp, NULL);
  781                 ip6->ip6_src    = *laddr;
  782                 ip6->ip6_dst    = *faddr;
  783 
  784                 udp6->uh_sum = in6_cksum_pseudo(ip6, plen, IPPROTO_UDP, 0);
  785                 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6;
  786                 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
  787 
  788                 flags = 0;
  789 
  790                 UDPSTAT_INC(udps_opackets);
  791                 error = ip6_output(m, optp, NULL, flags, inp->in6p_moptions,
  792                     NULL, inp);
  793                 break;
  794         case AF_INET:
  795                 error = EAFNOSUPPORT;
  796                 goto release;
  797         }
  798         goto releaseopt;
  799 
  800 release:
  801         m_freem(m);
  802 
  803 releaseopt:
  804         if (control) {
  805                 ip6_clearpktopts(&opt, -1);
  806                 m_freem(control);
  807         }
  808         return (error);
  809 }
  810 
  811 static void
  812 udp6_abort(struct socket *so)
  813 {
  814         struct inpcb *inp;
  815 
  816         inp = sotoinpcb(so);
  817         KASSERT(inp != NULL, ("udp6_abort: inp == NULL"));
  818 
  819 #ifdef INET
  820         if (inp->inp_vflag & INP_IPV4) {
  821                 struct pr_usrreqs *pru;
  822 
  823                 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
  824                 (*pru->pru_abort)(so);
  825                 return;
  826         }
  827 #endif
  828 
  829         INP_WLOCK(inp);
  830         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
  831                 INP_HASH_WLOCK(&V_udbinfo);
  832                 in6_pcbdisconnect(inp);
  833                 inp->in6p_laddr = in6addr_any;
  834                 INP_HASH_WUNLOCK(&V_udbinfo);
  835                 soisdisconnected(so);
  836         }
  837         INP_WUNLOCK(inp);
  838 }
  839 
  840 static int
  841 udp6_attach(struct socket *so, int proto, struct thread *td)
  842 {
  843         struct inpcb *inp;
  844         int error;
  845 
  846         inp = sotoinpcb(so);
  847         KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));
  848 
  849         if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
  850                 error = soreserve(so, udp_sendspace, udp_recvspace);
  851                 if (error)
  852                         return (error);
  853         }
  854         INP_INFO_WLOCK(&V_udbinfo);
  855         error = in_pcballoc(so, &V_udbinfo);
  856         if (error) {
  857                 INP_INFO_WUNLOCK(&V_udbinfo);
  858                 return (error);
  859         }
  860         inp = (struct inpcb *)so->so_pcb;
  861         inp->inp_vflag |= INP_IPV6;
  862         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)
  863                 inp->inp_vflag |= INP_IPV4;
  864         inp->in6p_hops = -1;    /* use kernel default */
  865         inp->in6p_cksum = -1;   /* just to be sure */
  866         /*
  867          * XXX: ugly!!
  868          * IPv4 TTL initialization is necessary for an IPv6 socket as well,
  869          * because the socket may be bound to an IPv6 wildcard address,
  870          * which may match an IPv4-mapped IPv6 address.
  871          */
  872         inp->inp_ip_ttl = V_ip_defttl;
  873 
  874         error = udp_newudpcb(inp);
  875         if (error) {
  876                 in_pcbdetach(inp);
  877                 in_pcbfree(inp);
  878                 INP_INFO_WUNLOCK(&V_udbinfo);
  879                 return (error);
  880         }
  881         INP_WUNLOCK(inp);
  882         INP_INFO_WUNLOCK(&V_udbinfo);
  883         return (0);
  884 }
  885 
  886 static int
  887 udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
  888 {
  889         struct inpcb *inp;
  890         int error;
  891 
  892         inp = sotoinpcb(so);
  893         KASSERT(inp != NULL, ("udp6_bind: inp == NULL"));
  894 
  895         INP_WLOCK(inp);
  896         INP_HASH_WLOCK(&V_udbinfo);
  897         inp->inp_vflag &= ~INP_IPV4;
  898         inp->inp_vflag |= INP_IPV6;
  899         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
  900                 struct sockaddr_in6 *sin6_p;
  901 
  902                 sin6_p = (struct sockaddr_in6 *)nam;
  903 
  904                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
  905                         inp->inp_vflag |= INP_IPV4;
  906 #ifdef INET
  907                 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
  908                         struct sockaddr_in sin;
  909 
  910                         in6_sin6_2_sin(&sin, sin6_p);
  911                         inp->inp_vflag |= INP_IPV4;
  912                         inp->inp_vflag &= ~INP_IPV6;
  913                         error = in_pcbbind(inp, (struct sockaddr *)&sin,
  914                             td->td_ucred);
  915                         goto out;
  916                 }
  917 #endif
  918         }
  919 
  920         error = in6_pcbbind(inp, nam, td->td_ucred);
  921 #ifdef INET
  922 out:
  923 #endif
  924         INP_HASH_WUNLOCK(&V_udbinfo);
  925         INP_WUNLOCK(inp);
  926         return (error);
  927 }
  928 
  929 static void
  930 udp6_close(struct socket *so)
  931 {
  932         struct inpcb *inp;
  933 
  934         inp = sotoinpcb(so);
  935         KASSERT(inp != NULL, ("udp6_close: inp == NULL"));
  936 
  937 #ifdef INET
  938         if (inp->inp_vflag & INP_IPV4) {
  939                 struct pr_usrreqs *pru;
  940 
  941                 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
  942                 (*pru->pru_disconnect)(so);
  943                 return;
  944         }
  945 #endif
  946         INP_WLOCK(inp);
  947         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
  948                 INP_HASH_WLOCK(&V_udbinfo);
  949                 in6_pcbdisconnect(inp);
  950                 inp->in6p_laddr = in6addr_any;
  951                 INP_HASH_WUNLOCK(&V_udbinfo);
  952                 soisdisconnected(so);
  953         }
  954         INP_WUNLOCK(inp);
  955 }
  956 
  957 static int
  958 udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
  959 {
  960         struct inpcb *inp;
  961         struct sockaddr_in6 *sin6;
  962         int error;
  963 
  964         inp = sotoinpcb(so);
  965         sin6 = (struct sockaddr_in6 *)nam;
  966         KASSERT(inp != NULL, ("udp6_connect: inp == NULL"));
  967 
  968         /*
  969          * XXXRW: Need to clarify locking of v4/v6 flags.
  970          */
  971         INP_WLOCK(inp);
  972 #ifdef INET
  973         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  974                 struct sockaddr_in sin;
  975 
  976                 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) {
  977                         error = EINVAL;
  978                         goto out;
  979                 }
  980                 if (inp->inp_faddr.s_addr != INADDR_ANY) {
  981                         error = EISCONN;
  982                         goto out;
  983                 }
  984                 in6_sin6_2_sin(&sin, sin6);
  985                 inp->inp_vflag |= INP_IPV4;
  986                 inp->inp_vflag &= ~INP_IPV6;
  987                 error = prison_remote_ip4(td->td_ucred, &sin.sin_addr);
  988                 if (error != 0)
  989                         goto out;
  990                 INP_HASH_WLOCK(&V_udbinfo);
  991                 error = in_pcbconnect(inp, (struct sockaddr *)&sin,
  992                     td->td_ucred);
  993                 INP_HASH_WUNLOCK(&V_udbinfo);
  994                 if (error == 0)
  995                         soisconnected(so);
  996                 goto out;
  997         }
  998 #endif
  999         if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
 1000                 error = EISCONN;
 1001                 goto out;
 1002         }
 1003         inp->inp_vflag &= ~INP_IPV4;
 1004         inp->inp_vflag |= INP_IPV6;
 1005         error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr);
 1006         if (error != 0)
 1007                 goto out;
 1008         INP_HASH_WLOCK(&V_udbinfo);
 1009         error = in6_pcbconnect(inp, nam, td->td_ucred);
 1010         INP_HASH_WUNLOCK(&V_udbinfo);
 1011         if (error == 0)
 1012                 soisconnected(so);
 1013 out:
 1014         INP_WUNLOCK(inp);
 1015         return (error);
 1016 }
 1017 
 1018 static void
 1019 udp6_detach(struct socket *so)
 1020 {
 1021         struct inpcb *inp;
 1022         struct udpcb *up;
 1023 
 1024         inp = sotoinpcb(so);
 1025         KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));
 1026 
 1027         INP_INFO_WLOCK(&V_udbinfo);
 1028         INP_WLOCK(inp);
 1029         up = intoudpcb(inp);
 1030         KASSERT(up != NULL, ("%s: up == NULL", __func__));
 1031         in_pcbdetach(inp);
 1032         in_pcbfree(inp);
 1033         INP_INFO_WUNLOCK(&V_udbinfo);
 1034         udp_discardcb(up);
 1035 }
 1036 
 1037 static int
 1038 udp6_disconnect(struct socket *so)
 1039 {
 1040         struct inpcb *inp;
 1041         int error;
 1042 
 1043         inp = sotoinpcb(so);
 1044         KASSERT(inp != NULL, ("udp6_disconnect: inp == NULL"));
 1045 
 1046 #ifdef INET
 1047         if (inp->inp_vflag & INP_IPV4) {
 1048                 struct pr_usrreqs *pru;
 1049 
 1050                 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
 1051                 (void)(*pru->pru_disconnect)(so);
 1052                 return (0);
 1053         }
 1054 #endif
 1055 
 1056         INP_WLOCK(inp);
 1057 
 1058         if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
 1059                 error = ENOTCONN;
 1060                 goto out;
 1061         }
 1062 
 1063         INP_HASH_WLOCK(&V_udbinfo);
 1064         in6_pcbdisconnect(inp);
 1065         inp->in6p_laddr = in6addr_any;
 1066         INP_HASH_WUNLOCK(&V_udbinfo);
 1067         SOCK_LOCK(so);
 1068         so->so_state &= ~SS_ISCONNECTED;                /* XXX */
 1069         SOCK_UNLOCK(so);
 1070 out:
 1071         INP_WUNLOCK(inp);
 1072         return (0);
 1073 }
 1074 
 1075 static int
 1076 udp6_send(struct socket *so, int flags, struct mbuf *m,
 1077     struct sockaddr *addr, struct mbuf *control, struct thread *td)
 1078 {
 1079         struct inpcb *inp;
 1080         int error = 0;
 1081 
 1082         inp = sotoinpcb(so);
 1083         KASSERT(inp != NULL, ("udp6_send: inp == NULL"));
 1084 
 1085         INP_WLOCK(inp);
 1086         if (addr) {
 1087                 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 1088                         error = EINVAL;
 1089                         goto bad;
 1090                 }
 1091                 if (addr->sa_family != AF_INET6) {
 1092                         error = EAFNOSUPPORT;
 1093                         goto bad;
 1094                 }
 1095         }
 1096 
 1097 #ifdef INET
 1098         if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
 1099                 int hasv4addr;
 1100                 struct sockaddr_in6 *sin6 = 0;
 1101 
 1102                 if (addr == 0)
 1103                         hasv4addr = (inp->inp_vflag & INP_IPV4);
 1104                 else {
 1105                         sin6 = (struct sockaddr_in6 *)addr;
 1106                         hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
 1107                             ? 1 : 0;
 1108                 }
 1109                 if (hasv4addr) {
 1110                         struct pr_usrreqs *pru;
 1111 
 1112                         /*
 1113                          * XXXRW: We release UDP-layer locks before calling
 1114                          * udp_send() in order to avoid recursion.  However,
 1115                          * this does mean there is a short window where inp's
 1116                          * fields are unstable.  Could this lead to a
 1117                          * potential race in which the factors causing us to
 1118                          * select the UDPv4 output routine are invalidated?
 1119                          */
 1120                         INP_WUNLOCK(inp);
 1121                         if (sin6)
 1122                                 in6_sin6_2_sin_in_sock(addr);
 1123                         pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
 1124                         /* addr will just be freed in sendit(). */
 1125                         return ((*pru->pru_send)(so, flags, m, addr, control,
 1126                             td));
 1127                 }
 1128         }
 1129 #endif
 1130 #ifdef MAC
 1131         mac_inpcb_create_mbuf(inp, m);
 1132 #endif
 1133         INP_HASH_WLOCK(&V_udbinfo);
 1134         error = udp6_output(inp, m, addr, control, td);
 1135         INP_HASH_WUNLOCK(&V_udbinfo);
 1136 #ifdef INET
 1137 #endif  
 1138         INP_WUNLOCK(inp);
 1139         return (error);
 1140 
 1141 bad:
 1142         INP_WUNLOCK(inp);
 1143         m_freem(m);
 1144         return (error);
 1145 }
 1146 
 1147 struct pr_usrreqs udp6_usrreqs = {
 1148         .pru_abort =            udp6_abort,
 1149         .pru_attach =           udp6_attach,
 1150         .pru_bind =             udp6_bind,
 1151         .pru_connect =          udp6_connect,
 1152         .pru_control =          in6_control,
 1153         .pru_detach =           udp6_detach,
 1154         .pru_disconnect =       udp6_disconnect,
 1155         .pru_peeraddr =         in6_mapped_peeraddr,
 1156         .pru_send =             udp6_send,
 1157         .pru_shutdown =         udp_shutdown,
 1158         .pru_sockaddr =         in6_mapped_sockaddr,
 1159         .pru_soreceive =        soreceive_dgram,
 1160         .pru_sosend =           sosend_dgram,
 1161         .pru_sosetlabel =       in_pcbsosetlabel,
 1162         .pru_close =            udp6_close
 1163 };

Cache object: 42f6d0a15997b8243424c3bec7a15b99


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