825 lines
20 KiB
C
825 lines
20 KiB
C
/* $FreeBSD$ */
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/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */
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/*-
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)udp_var.h 8.1 (Berkeley) 6/10/93
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*/
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipsec.h"
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/signalvar.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/stat.h>
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#include <sys/sx.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/icmp6.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet6/ip6protosw.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/udp6_var.h>
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#include <netinet6/ipsec6.h>
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#endif /* IPSEC */
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#ifdef FAST_IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/ipsec6.h>
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#endif /* FAST_IPSEC */
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/*
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* UDP protocol inplementation.
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* Per RFC 768, August, 1980.
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*/
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extern struct protosw inetsw[];
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static int udp6_detach __P((struct socket *so));
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int
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udp6_input(mp, offp, proto)
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struct mbuf **mp;
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int *offp, proto;
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{
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struct mbuf *m = *mp, *opts;
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register struct ip6_hdr *ip6;
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register struct udphdr *uh;
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register struct inpcb *in6p;
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int off = *offp;
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int plen, ulen;
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struct sockaddr_in6 fromsa;
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opts = NULL;
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ip6 = mtod(m, struct ip6_hdr *);
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if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
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/* XXX send icmp6 host/port unreach? */
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m_freem(m);
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return IPPROTO_DONE;
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}
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#ifndef PULLDOWN_TEST
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IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
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ip6 = mtod(m, struct ip6_hdr *);
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uh = (struct udphdr *)((caddr_t)ip6 + off);
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#else
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IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
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if (!uh)
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return IPPROTO_DONE;
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#endif
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udpstat.udps_ipackets++;
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plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
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ulen = ntohs((u_short)uh->uh_ulen);
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if (plen != ulen) {
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udpstat.udps_badlen++;
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goto bad;
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}
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/*
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* Checksum extended UDP header and data.
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*/
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if (uh->uh_sum == 0) {
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udpstat.udps_nosum++;
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goto bad;
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}
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if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
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udpstat.udps_badsum++;
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goto bad;
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}
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if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
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struct inpcb *last;
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/*
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* Deliver a multicast datagram to all sockets
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* for which the local and remote addresses and ports match
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* those of the incoming datagram. This allows more than
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* one process to receive multicasts on the same port.
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* (This really ought to be done for unicast datagrams as
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* well, but that would cause problems with existing
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* applications that open both address-specific sockets and
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* a wildcard socket listening to the same port -- they would
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* end up receiving duplicates of every unicast datagram.
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* Those applications open the multiple sockets to overcome an
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* inadequacy of the UDP socket interface, but for backwards
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* compatibility we avoid the problem here rather than
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* fixing the interface. Maybe 4.5BSD will remedy this?)
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*/
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/*
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* In a case that laddr should be set to the link-local
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* address (this happens in RIPng), the multicast address
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* specified in the received packet does not match with
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* laddr. To cure this situation, the matching is relaxed
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* if the receiving interface is the same as one specified
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* in the socket and if the destination multicast address
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* matches one of the multicast groups specified in the socket.
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*/
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/*
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* Construct sockaddr format source address.
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*/
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init_sin6(&fromsa, m);
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fromsa.sin6_port = uh->uh_sport;
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/*
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* KAME note: traditionally we dropped udpiphdr from mbuf here.
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* We need udphdr for IPsec processing so we do that later.
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*/
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/*
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* Locate pcb(s) for datagram.
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* (Algorithm copied from raw_intr().)
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*/
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last = NULL;
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LIST_FOREACH(in6p, &udb, inp_list) {
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if ((in6p->inp_vflag & INP_IPV6) == 0)
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continue;
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if (in6p->in6p_lport != uh->uh_dport)
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continue;
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if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
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if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
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&ip6->ip6_dst))
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continue;
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}
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if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
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if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
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&ip6->ip6_src) ||
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in6p->in6p_fport != uh->uh_sport)
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continue;
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}
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if (last != NULL) {
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struct mbuf *n;
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#if defined(IPSEC) || defined(FAST_IPSEC)
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/*
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* Check AH/ESP integrity.
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*/
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if (ipsec6_in_reject(m, last)) {
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#ifdef IPSEC
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ipsec6stat.in_polvio++;
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#endif /* IPSEC */
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/* do not inject data into pcb */
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} else
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#endif /*IPSEC || FAST_IPSEC*/
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if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
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/*
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* KAME NOTE: do not
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* m_copy(m, offset, ...) above.
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* sbappendaddr() expects M_PKTHDR,
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* and m_copy() will copy M_PKTHDR
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* only if offset is 0.
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*/
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if (last->in6p_flags & IN6P_CONTROLOPTS
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|| last->in6p_socket->so_options & SO_TIMESTAMP)
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ip6_savecontrol(last, n, &opts);
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m_adj(n, off + sizeof(struct udphdr));
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if (sbappendaddr(&last->in6p_socket->so_rcv,
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(struct sockaddr *)&fromsa,
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n, opts) == 0) {
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m_freem(n);
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if (opts)
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m_freem(opts);
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udpstat.udps_fullsock++;
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} else
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sorwakeup(last->in6p_socket);
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opts = NULL;
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}
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}
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last = in6p;
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/*
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* Don't look for additional matches if this one does
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* not have either the SO_REUSEPORT or SO_REUSEADDR
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* socket options set. This heuristic avoids searching
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* through all pcbs in the common case of a non-shared
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* port. It assumes that an application will never
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* clear these options after setting them.
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*/
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if ((last->in6p_socket->so_options &
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(SO_REUSEPORT|SO_REUSEADDR)) == 0)
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break;
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}
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if (last == NULL) {
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/*
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* No matching pcb found; discard datagram.
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* (No need to send an ICMP Port Unreachable
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* for a broadcast or multicast datgram.)
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*/
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udpstat.udps_noport++;
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udpstat.udps_noportmcast++;
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goto bad;
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}
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#if defined(IPSEC) || defined(FAST_IPSEC)
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/*
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* Check AH/ESP integrity.
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*/
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if (ipsec6_in_reject(m, last)) {
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#ifdef IPSEC
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ipsec6stat.in_polvio++;
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#endif /* IPSEC */
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goto bad;
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}
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#endif /*IPSEC || FAST_IPSEC*/
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if (last->in6p_flags & IN6P_CONTROLOPTS
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|| last->in6p_socket->so_options & SO_TIMESTAMP)
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ip6_savecontrol(last, m, &opts);
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m_adj(m, off + sizeof(struct udphdr));
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if (sbappendaddr(&last->in6p_socket->so_rcv,
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(struct sockaddr *)&fromsa,
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m, opts) == 0) {
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udpstat.udps_fullsock++;
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goto bad;
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}
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sorwakeup(last->in6p_socket);
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return IPPROTO_DONE;
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}
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/*
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* Locate pcb for datagram.
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*/
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in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
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&ip6->ip6_dst, uh->uh_dport, 1,
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m->m_pkthdr.rcvif);
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if (in6p == 0) {
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if (log_in_vain) {
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char buf[INET6_ADDRSTRLEN];
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strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
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log(LOG_INFO,
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"Connection attempt to UDP [%s]:%d from [%s]:%d\n",
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buf, ntohs(uh->uh_dport),
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ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
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}
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udpstat.udps_noport++;
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if (m->m_flags & M_MCAST) {
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printf("UDP6: M_MCAST is set in a unicast packet.\n");
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udpstat.udps_noportmcast++;
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goto bad;
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}
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icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
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return IPPROTO_DONE;
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}
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#if defined(IPSEC) || defined(FAST_IPSEC)
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/*
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* Check AH/ESP integrity.
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*/
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if (ipsec6_in_reject(m, in6p)) {
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#ifdef IPSEC
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ipsec6stat.in_polvio++;
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#endif /* IPSEC */
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goto bad;
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}
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#endif /*IPSEC || FAST_IPSEC*/
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/*
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* Construct sockaddr format source address.
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* Stuff source address and datagram in user buffer.
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*/
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init_sin6(&fromsa, m);
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fromsa.sin6_port = uh->uh_sport;
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if (in6p->in6p_flags & IN6P_CONTROLOPTS
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|| in6p->in6p_socket->so_options & SO_TIMESTAMP)
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ip6_savecontrol(in6p, m, &opts);
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m_adj(m, off + sizeof(struct udphdr));
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if (sbappendaddr(&in6p->in6p_socket->so_rcv,
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(struct sockaddr *)&fromsa, m, opts) == 0) {
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udpstat.udps_fullsock++;
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goto bad;
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}
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sorwakeup(in6p->in6p_socket);
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return IPPROTO_DONE;
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bad:
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if (m)
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m_freem(m);
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if (opts)
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m_freem(opts);
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return IPPROTO_DONE;
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}
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void
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udp6_ctlinput(cmd, sa, d)
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int cmd;
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struct sockaddr *sa;
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void *d;
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{
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struct udphdr uh;
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struct ip6_hdr *ip6;
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struct mbuf *m;
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int off = 0;
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struct ip6ctlparam *ip6cp = NULL;
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const struct sockaddr_in6 *sa6_src = NULL;
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void *cmdarg;
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struct inpcb *(*notify) __P((struct inpcb *, int)) = udp_notify;
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struct udp_portonly {
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u_int16_t uh_sport;
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u_int16_t uh_dport;
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} *uhp;
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if (sa->sa_family != AF_INET6 ||
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sa->sa_len != sizeof(struct sockaddr_in6))
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return;
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if ((unsigned)cmd >= PRC_NCMDS)
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return;
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if (PRC_IS_REDIRECT(cmd))
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notify = in6_rtchange, d = NULL;
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else if (cmd == PRC_HOSTDEAD)
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d = NULL;
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else if (inet6ctlerrmap[cmd] == 0)
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return;
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/* if the parameter is from icmp6, decode it. */
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if (d != NULL) {
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ip6cp = (struct ip6ctlparam *)d;
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m = ip6cp->ip6c_m;
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ip6 = ip6cp->ip6c_ip6;
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off = ip6cp->ip6c_off;
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cmdarg = ip6cp->ip6c_cmdarg;
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sa6_src = ip6cp->ip6c_src;
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} else {
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m = NULL;
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ip6 = NULL;
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cmdarg = NULL;
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sa6_src = &sa6_any;
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}
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if (ip6) {
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/*
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* XXX: We assume that when IPV6 is non NULL,
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* M and OFF are valid.
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*/
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/* check if we can safely examine src and dst ports */
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if (m->m_pkthdr.len < off + sizeof(*uhp))
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return;
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bzero(&uh, sizeof(uh));
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m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
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(void) in6_pcbnotify(&udbinfo, sa, uh.uh_dport,
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(struct sockaddr *)ip6cp->ip6c_src,
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uh.uh_sport, cmd, cmdarg, notify);
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} else
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(void) in6_pcbnotify(&udbinfo, sa, 0,
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(const struct sockaddr *)sa6_src,
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0, cmd, cmdarg, notify);
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}
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static int
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udp6_getcred(SYSCTL_HANDLER_ARGS)
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{
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struct xucred xuc;
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struct sockaddr_in6 addrs[2];
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struct inpcb *inp;
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int error, s;
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error = suser(req->td);
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if (error)
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return (error);
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if (req->newlen != sizeof(addrs))
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return (EINVAL);
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if (req->oldlen != sizeof(struct xucred))
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return (EINVAL);
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error = SYSCTL_IN(req, addrs, sizeof(addrs));
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if (error)
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return (error);
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s = splnet();
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inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
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addrs[1].sin6_port,
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&addrs[0].sin6_addr, addrs[0].sin6_port,
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1, NULL);
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if (!inp || !inp->inp_socket) {
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error = ENOENT;
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goto out;
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}
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cru2x(inp->inp_socket->so_cred, &xuc);
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error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
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out:
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splx(s);
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return (error);
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}
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|
|
|
SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
|
|
0, 0,
|
|
udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection");
|
|
|
|
static int
|
|
udp6_abort(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
int s;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return EINVAL; /* ??? possible? panic instead? */
|
|
}
|
|
soisdisconnected(so);
|
|
s = splnet();
|
|
INP_LOCK(inp);
|
|
in6_pcbdetach(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp6_attach(struct socket *so, int proto, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
int s, error;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp != 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return EINVAL;
|
|
}
|
|
|
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
|
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
|
if (error) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return error;
|
|
}
|
|
}
|
|
s = splnet();
|
|
error = in_pcballoc(so, &udbinfo, "udp6inp");
|
|
splx(s);
|
|
if (error) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return error;
|
|
}
|
|
inp = (struct inpcb *)so->so_pcb;
|
|
INP_LOCK(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
inp->inp_vflag |= INP_IPV6;
|
|
if (!ip6_v6only)
|
|
inp->inp_vflag |= INP_IPV4;
|
|
inp->in6p_hops = -1; /* use kernel default */
|
|
inp->in6p_cksum = -1; /* just to be sure */
|
|
/*
|
|
* XXX: ugly!!
|
|
* IPv4 TTL initialization is necessary for an IPv6 socket as well,
|
|
* because the socket may be bound to an IPv6 wildcard address,
|
|
* which may match an IPv4-mapped IPv6 address.
|
|
*/
|
|
inp->inp_ip_ttl = ip_defttl;
|
|
INP_UNLOCK(inp);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
int s, error;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return EINVAL;
|
|
}
|
|
INP_LOCK(inp);
|
|
|
|
inp->inp_vflag &= ~INP_IPV4;
|
|
inp->inp_vflag |= INP_IPV6;
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
|
|
struct sockaddr_in6 *sin6_p;
|
|
|
|
sin6_p = (struct sockaddr_in6 *)nam;
|
|
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
|
|
inp->inp_vflag |= INP_IPV4;
|
|
else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
|
|
struct sockaddr_in sin;
|
|
|
|
in6_sin6_2_sin(&sin, sin6_p);
|
|
inp->inp_vflag |= INP_IPV4;
|
|
inp->inp_vflag &= ~INP_IPV6;
|
|
s = splnet();
|
|
error = in_pcbbind(inp, (struct sockaddr *)&sin,
|
|
td->td_ucred);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
s = splnet();
|
|
error = in6_pcbbind(inp, nam, td->td_ucred);
|
|
out:
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
splx(s);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
int s, error;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return EINVAL;
|
|
}
|
|
INP_LOCK(inp);
|
|
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
|
|
struct sockaddr_in6 *sin6_p;
|
|
|
|
sin6_p = (struct sockaddr_in6 *)nam;
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
|
|
struct sockaddr_in sin;
|
|
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY)
|
|
return EISCONN;
|
|
in6_sin6_2_sin(&sin, sin6_p);
|
|
s = splnet();
|
|
error = in_pcbconnect(inp, (struct sockaddr *)&sin,
|
|
td->td_ucred);
|
|
splx(s);
|
|
if (error == 0) {
|
|
inp->inp_vflag |= INP_IPV4;
|
|
inp->inp_vflag &= ~INP_IPV6;
|
|
soisconnected(so);
|
|
}
|
|
goto out;
|
|
}
|
|
}
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
|
|
error = EISCONN;
|
|
goto out;
|
|
}
|
|
s = splnet();
|
|
error = in6_pcbconnect(inp, nam, td->td_ucred);
|
|
splx(s);
|
|
if (error == 0) {
|
|
if (!ip6_v6only) { /* should be non mapped addr */
|
|
inp->inp_vflag &= ~INP_IPV4;
|
|
inp->inp_vflag |= INP_IPV6;
|
|
}
|
|
soisconnected(so);
|
|
}
|
|
out:
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
udp6_detach(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
int s;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return EINVAL;
|
|
}
|
|
INP_LOCK(inp);
|
|
s = splnet();
|
|
in6_pcbdetach(inp);
|
|
splx(s);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp6_disconnect(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
int error, s;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return EINVAL;
|
|
}
|
|
INP_LOCK(inp);
|
|
|
|
#ifdef INET
|
|
if (inp->inp_vflag & INP_IPV4) {
|
|
struct pr_usrreqs *pru;
|
|
|
|
pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
|
|
error = (*pru->pru_disconnect)(so);
|
|
goto out;
|
|
}
|
|
#endif
|
|
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
|
|
error = ENOTCONN;
|
|
goto out;
|
|
}
|
|
|
|
s = splnet();
|
|
in6_pcbdisconnect(inp);
|
|
inp->in6p_laddr = in6addr_any;
|
|
splx(s);
|
|
/* XXXRW: so_state locking? */
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
|
out:
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
|
|
struct mbuf *control, struct thread *td)
|
|
{
|
|
struct inpcb *inp;
|
|
int error = 0;
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
m_freem(m);
|
|
return EINVAL;
|
|
}
|
|
INP_LOCK(inp);
|
|
|
|
if (addr) {
|
|
if (addr->sa_len != sizeof(struct sockaddr_in6)) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
if (addr->sa_family != AF_INET6) {
|
|
error = EAFNOSUPPORT;
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
#ifdef INET
|
|
if (!ip6_v6only) {
|
|
int hasv4addr;
|
|
struct sockaddr_in6 *sin6 = 0;
|
|
|
|
if (addr == 0)
|
|
hasv4addr = (inp->inp_vflag & INP_IPV4);
|
|
else {
|
|
sin6 = (struct sockaddr_in6 *)addr;
|
|
hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
|
|
? 1 : 0;
|
|
}
|
|
if (hasv4addr) {
|
|
struct pr_usrreqs *pru;
|
|
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
|
|
/*
|
|
* since a user of this socket set the
|
|
* IPV6_V6ONLY flag, we discard this
|
|
* datagram destined to a v4 addr.
|
|
*/
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
|
|
!IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) {
|
|
/*
|
|
* when remote addr is IPv4-mapped
|
|
* address, local addr should not be
|
|
* an IPv6 address; since you cannot
|
|
* determine how to map IPv6 source
|
|
* address to IPv4.
|
|
*/
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (sin6)
|
|
in6_sin6_2_sin_in_sock(addr);
|
|
pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
|
|
error = ((*pru->pru_send)(so, flags, m, addr, control,
|
|
td));
|
|
/* addr will just be freed in sendit(). */
|
|
goto out;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
error = udp6_output(inp, m, addr, control, td);
|
|
out:
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
return error;
|
|
|
|
bad:
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
struct pr_usrreqs udp6_usrreqs = {
|
|
.pru_abort = udp6_abort,
|
|
.pru_attach = udp6_attach,
|
|
.pru_bind = udp6_bind,
|
|
.pru_connect = udp6_connect,
|
|
.pru_control = in6_control,
|
|
.pru_detach = udp6_detach,
|
|
.pru_disconnect = udp6_disconnect,
|
|
.pru_peeraddr = in6_mapped_peeraddr,
|
|
.pru_send = udp6_send,
|
|
.pru_shutdown = udp_shutdown,
|
|
.pru_sockaddr = in6_mapped_sockaddr,
|
|
.pru_sosetlabel = in_pcbsosetlabel
|
|
};
|