07385abd73
synchronizing IPv6 protocol control blocks and lists. These changes are modeled on the inpcb locking for IPv4, submitted by Jennifer Yang, and committed by Jeffrey Hsu. With these locking changes, IPv6 use of inpcbs is now substantially more MPSAFE, and permits IPv4 inpcb locking assertions to be run in the presence of IPv6 compiled into the kernel.
813 lines
20 KiB
C
813 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(&udb, 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(&udb, 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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}
|
|
cru2x(inp->inp_socket->so_cred, &xuc);
|
|
error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
|
|
out:
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
|
|
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 = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL; /* ??? possible? panic instead? */
|
|
soisdisconnected(so);
|
|
s = splnet();
|
|
in6_pcbdetach(inp);
|
|
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 = {
|
|
udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect,
|
|
pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect,
|
|
pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp,
|
|
pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown,
|
|
in6_mapped_sockaddr, sosend, soreceive, sopoll, in_pcbsosetlabel
|
|
};
|