2000-07-04 16:35:15 +00:00
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|
|
/* $FreeBSD$ */
|
2001-06-11 12:39:29 +00:00
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|
|
/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */
|
2000-07-04 16:35:15 +00:00
|
|
|
|
1999-12-07 17:39:16 +00:00
|
|
|
/*
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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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|
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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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|
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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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|
|
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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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|
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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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|
|
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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
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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|
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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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|
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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|
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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|
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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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2000-07-04 16:35:15 +00:00
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#include "opt_inet.h"
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|
|
#include "opt_inet6.h"
|
1999-12-22 19:13:38 +00:00
|
|
|
#include "opt_ipsec.h"
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|
1999-12-07 17:39:16 +00:00
|
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|
#include <sys/param.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/errno.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <sys/kernel.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/lock.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <sys/mbuf.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/proc.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <sys/protosw.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/signalvar.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <sys/socket.h>
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|
|
#include <sys/socketvar.h>
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|
|
|
#include <sys/stat.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/sx.h>
|
|
|
|
#include <sys/sysctl.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <sys/syslog.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/systm.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <net/if_types.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <net/route.h>
|
1999-12-07 17:39:16 +00:00
|
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|
|
|
|
|
#include <netinet/in.h>
|
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|
|
#include <netinet/in_pcb.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <netinet/in_systm.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <netinet/in_var.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <netinet/ip.h>
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|
|
|
#include <netinet/ip6.h>
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|
|
#include <netinet/icmp6.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#include <netinet/ip_var.h>
|
|
|
|
#include <netinet/udp.h>
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|
|
|
#include <netinet/udp_var.h>
|
2002-04-30 01:54:54 +00:00
|
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|
#include <netinet6/ip6protosw.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#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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|
|
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|
|
#ifdef IPSEC
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|
|
#include <netinet6/ipsec.h>
|
1999-12-22 19:13:38 +00:00
|
|
|
#include <netinet6/ipsec6.h>
|
2002-04-19 04:46:24 +00:00
|
|
|
#endif /* IPSEC */
|
1999-12-07 17:39:16 +00:00
|
|
|
|
2002-10-16 02:25:05 +00:00
|
|
|
#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 */
|
|
|
|
|
1999-12-07 17:39:16 +00:00
|
|
|
/*
|
|
|
|
* UDP protocol inplementation.
|
|
|
|
* 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));
|
|
|
|
|
|
|
|
int
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|
udp6_input(mp, offp, proto)
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|
|
struct mbuf **mp;
|
|
|
|
int *offp, proto;
|
|
|
|
{
|
2004-02-13 15:11:47 +00:00
|
|
|
struct mbuf *m = *mp, *opts;
|
1999-12-07 17:39:16 +00:00
|
|
|
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;
|
2003-11-02 19:09:29 +00:00
|
|
|
struct sockaddr_in6 fromsa;
|
1999-12-07 17:39:16 +00:00
|
|
|
|
2004-02-13 15:11:47 +00:00
|
|
|
opts = NULL;
|
2001-06-11 12:39:29 +00:00
|
|
|
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
|
|
|
2001-09-25 18:40:52 +00:00
|
|
|
if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
|
2001-06-11 12:39:29 +00:00
|
|
|
/* XXX send icmp6 host/port unreach? */
|
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|
|
m_freem(m);
|
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|
|
return IPPROTO_DONE;
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
|
2004-02-13 15:11:47 +00:00
|
|
|
#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 *);
|
|
|
|
uh = (struct udphdr *)((caddr_t)ip6 + off);
|
|
|
|
#else
|
|
|
|
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
|
|
|
|
if (!uh)
|
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|
|
return IPPROTO_DONE;
|
|
|
|
#endif
|
|
|
|
|
2001-06-11 12:39:29 +00:00
|
|
|
udpstat.udps_ipackets++;
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
|
|
|
|
ulen = ntohs((u_short)uh->uh_ulen);
|
|
|
|
|
|
|
|
if (plen != ulen) {
|
|
|
|
udpstat.udps_badlen++;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Checksum extended UDP header and data.
|
|
|
|
*/
|
|
|
|
if (uh->uh_sum == 0)
|
|
|
|
udpstat.udps_nosum++;
|
|
|
|
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
|
|
|
|
udpstat.udps_badsum++;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
|
|
|
|
struct inpcb *last;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Deliver a multicast datagram to all sockets
|
|
|
|
* for which the local and remote addresses and ports match
|
|
|
|
* those of the incoming datagram. This allows more than
|
|
|
|
* one process to receive multicasts on the same port.
|
|
|
|
* (This really ought to be done for unicast datagrams as
|
|
|
|
* well, but that would cause problems with existing
|
|
|
|
* applications that open both address-specific sockets and
|
|
|
|
* a wildcard socket listening to the same port -- they would
|
|
|
|
* end up receiving duplicates of every unicast datagram.
|
|
|
|
* Those applications open the multiple sockets to overcome an
|
|
|
|
* inadequacy of the UDP socket interface, but for backwards
|
|
|
|
* compatibility we avoid the problem here rather than
|
|
|
|
* fixing the interface. Maybe 4.5BSD will remedy this?)
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* In a case that laddr should be set to the link-local
|
|
|
|
* address (this happens in RIPng), the multicast address
|
|
|
|
* specified in the received packet does not match with
|
|
|
|
* laddr. To cure this situation, the matching is relaxed
|
|
|
|
* if the receiving interface is the same as one specified
|
|
|
|
* in the socket and if the destination multicast address
|
|
|
|
* matches one of the multicast groups specified in the socket.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Construct sockaddr format source address.
|
|
|
|
*/
|
2004-02-13 15:11:47 +00:00
|
|
|
init_sin6(&fromsa, m);
|
2003-11-02 19:09:29 +00:00
|
|
|
fromsa.sin6_port = uh->uh_sport;
|
1999-12-07 17:39:16 +00:00
|
|
|
/*
|
2002-04-19 04:46:24 +00:00
|
|
|
* KAME note: traditionally we dropped udpiphdr from mbuf here.
|
1999-12-07 17:39:16 +00:00
|
|
|
* We need udphdr for IPsec processing so we do that later.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Locate pcb(s) for datagram.
|
|
|
|
* (Algorithm copied from raw_intr().)
|
|
|
|
*/
|
|
|
|
last = NULL;
|
|
|
|
LIST_FOREACH(in6p, &udb, inp_list) {
|
1999-12-21 11:14:12 +00:00
|
|
|
if ((in6p->inp_vflag & INP_IPV6) == 0)
|
1999-12-07 17:39:16 +00:00
|
|
|
continue;
|
|
|
|
if (in6p->in6p_lport != uh->uh_dport)
|
|
|
|
continue;
|
|
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
|
|
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
|
2004-02-13 15:11:47 +00:00
|
|
|
&ip6->ip6_dst))
|
1999-12-07 17:39:16 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
|
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
|
|
|
|
&ip6->ip6_src) ||
|
2004-02-13 15:11:47 +00:00
|
|
|
in6p->in6p_fport != uh->uh_sport)
|
1999-12-07 17:39:16 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (last != NULL) {
|
2004-02-13 15:11:47 +00:00
|
|
|
struct mbuf *n;
|
1999-12-07 17:39:16 +00:00
|
|
|
|
2004-02-17 14:02:37 +00:00
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
1999-12-07 17:39:16 +00:00
|
|
|
/*
|
|
|
|
* Check AH/ESP integrity.
|
|
|
|
*/
|
2004-02-17 14:02:37 +00:00
|
|
|
if (ipsec6_in_reject(m, last)) {
|
|
|
|
#ifdef IPSEC
|
1999-12-07 17:39:16 +00:00
|
|
|
ipsec6stat.in_polvio++;
|
2002-04-19 04:46:24 +00:00
|
|
|
#endif /* IPSEC */
|
2004-02-17 14:02:37 +00:00
|
|
|
/* do not inject data into pcb */
|
|
|
|
} else
|
|
|
|
#endif /*IPSEC || FAST_IPSEC*/
|
1999-12-07 17:39:16 +00:00
|
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
|
|
|
|
/*
|
|
|
|
* KAME NOTE: do not
|
|
|
|
* m_copy(m, offset, ...) above.
|
|
|
|
* sbappendaddr() expects M_PKTHDR,
|
|
|
|
* and m_copy() will copy M_PKTHDR
|
|
|
|
* only if offset is 0.
|
|
|
|
*/
|
2002-05-31 11:52:35 +00:00
|
|
|
if (last->in6p_flags & IN6P_CONTROLOPTS
|
|
|
|
|| last->in6p_socket->so_options & SO_TIMESTAMP)
|
2003-10-29 12:52:28 +00:00
|
|
|
ip6_savecontrol(last, n, &opts);
|
2003-10-09 16:13:47 +00:00
|
|
|
|
1999-12-07 17:39:16 +00:00
|
|
|
m_adj(n, off + sizeof(struct udphdr));
|
|
|
|
if (sbappendaddr(&last->in6p_socket->so_rcv,
|
2004-02-13 15:11:47 +00:00
|
|
|
(struct sockaddr *)&fromsa,
|
1999-12-07 17:39:16 +00:00
|
|
|
n, opts) == 0) {
|
|
|
|
m_freem(n);
|
|
|
|
if (opts)
|
|
|
|
m_freem(opts);
|
|
|
|
udpstat.udps_fullsock++;
|
2002-05-31 11:52:35 +00:00
|
|
|
} else
|
1999-12-07 17:39:16 +00:00
|
|
|
sorwakeup(last->in6p_socket);
|
2001-06-11 12:39:29 +00:00
|
|
|
opts = NULL;
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
last = in6p;
|
|
|
|
/*
|
|
|
|
* Don't look for additional matches if this one does
|
|
|
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
|
|
|
* socket options set. This heuristic avoids searching
|
|
|
|
* through all pcbs in the common case of a non-shared
|
|
|
|
* port. It assumes that an application will never
|
|
|
|
* clear these options after setting them.
|
|
|
|
*/
|
|
|
|
if ((last->in6p_socket->so_options &
|
2002-05-31 11:52:35 +00:00
|
|
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0)
|
1999-12-07 17:39:16 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (last == NULL) {
|
|
|
|
/*
|
|
|
|
* No matching pcb found; discard datagram.
|
|
|
|
* (No need to send an ICMP Port Unreachable
|
|
|
|
* for a broadcast or multicast datgram.)
|
|
|
|
*/
|
|
|
|
udpstat.udps_noport++;
|
|
|
|
udpstat.udps_noportmcast++;
|
|
|
|
goto bad;
|
|
|
|
}
|
2004-02-17 14:02:37 +00:00
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
1999-12-07 17:39:16 +00:00
|
|
|
/*
|
|
|
|
* Check AH/ESP integrity.
|
|
|
|
*/
|
2004-02-03 18:20:55 +00:00
|
|
|
if (ipsec6_in_reject(m, last)) {
|
2004-02-17 14:02:37 +00:00
|
|
|
#ifdef IPSEC
|
1999-12-07 17:39:16 +00:00
|
|
|
ipsec6stat.in_polvio++;
|
2002-04-19 04:46:24 +00:00
|
|
|
#endif /* IPSEC */
|
2002-10-16 02:25:05 +00:00
|
|
|
goto bad;
|
|
|
|
}
|
2004-02-17 14:02:37 +00:00
|
|
|
#endif /*IPSEC || FAST_IPSEC*/
|
2002-05-31 11:52:35 +00:00
|
|
|
if (last->in6p_flags & IN6P_CONTROLOPTS
|
|
|
|
|| last->in6p_socket->so_options & SO_TIMESTAMP)
|
2003-10-29 12:52:28 +00:00
|
|
|
ip6_savecontrol(last, m, &opts);
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
m_adj(m, off + sizeof(struct udphdr));
|
|
|
|
if (sbappendaddr(&last->in6p_socket->so_rcv,
|
2003-11-02 19:09:29 +00:00
|
|
|
(struct sockaddr *)&fromsa,
|
1999-12-07 17:39:16 +00:00
|
|
|
m, opts) == 0) {
|
|
|
|
udpstat.udps_fullsock++;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
sorwakeup(last->in6p_socket);
|
|
|
|
return IPPROTO_DONE;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Locate pcb for datagram.
|
|
|
|
*/
|
|
|
|
in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
|
|
|
|
&ip6->ip6_dst, uh->uh_dport, 1,
|
|
|
|
m->m_pkthdr.rcvif);
|
|
|
|
if (in6p == 0) {
|
|
|
|
if (log_in_vain) {
|
|
|
|
char buf[INET6_ADDRSTRLEN];
|
|
|
|
|
|
|
|
strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
|
|
|
|
log(LOG_INFO,
|
2002-08-19 19:47:13 +00:00
|
|
|
"Connection attempt to UDP [%s]:%d from [%s]:%d\n",
|
1999-12-07 17:39:16 +00:00
|
|
|
buf, ntohs(uh->uh_dport),
|
|
|
|
ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
|
|
|
|
}
|
|
|
|
udpstat.udps_noport++;
|
|
|
|
if (m->m_flags & M_MCAST) {
|
|
|
|
printf("UDP6: M_MCAST is set in a unicast packet.\n");
|
|
|
|
udpstat.udps_noportmcast++;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
|
|
|
|
return IPPROTO_DONE;
|
|
|
|
}
|
2004-02-17 14:02:37 +00:00
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
1999-12-07 17:39:16 +00:00
|
|
|
/*
|
|
|
|
* Check AH/ESP integrity.
|
|
|
|
*/
|
2004-02-03 18:20:55 +00:00
|
|
|
if (ipsec6_in_reject(m, in6p)) {
|
2004-02-17 14:02:37 +00:00
|
|
|
#ifdef IPSEC
|
1999-12-07 17:39:16 +00:00
|
|
|
ipsec6stat.in_polvio++;
|
2002-04-19 04:46:24 +00:00
|
|
|
#endif /* IPSEC */
|
2002-10-16 02:25:05 +00:00
|
|
|
goto bad;
|
|
|
|
}
|
2004-02-17 14:02:37 +00:00
|
|
|
#endif /*IPSEC || FAST_IPSEC*/
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Construct sockaddr format source address.
|
|
|
|
* Stuff source address and datagram in user buffer.
|
|
|
|
*/
|
2004-02-13 15:11:47 +00:00
|
|
|
init_sin6(&fromsa, m);
|
2003-11-02 19:09:29 +00:00
|
|
|
fromsa.sin6_port = uh->uh_sport;
|
2002-05-31 11:52:35 +00:00
|
|
|
if (in6p->in6p_flags & IN6P_CONTROLOPTS
|
|
|
|
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)
|
2003-10-29 12:52:28 +00:00
|
|
|
ip6_savecontrol(in6p, m, &opts);
|
1999-12-07 17:39:16 +00:00
|
|
|
m_adj(m, off + sizeof(struct udphdr));
|
|
|
|
if (sbappendaddr(&in6p->in6p_socket->so_rcv,
|
2004-02-13 15:11:47 +00:00
|
|
|
(struct sockaddr *)&fromsa, m, opts) == 0) {
|
1999-12-07 17:39:16 +00:00
|
|
|
udpstat.udps_fullsock++;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
sorwakeup(in6p->in6p_socket);
|
|
|
|
return IPPROTO_DONE;
|
|
|
|
bad:
|
|
|
|
if (m)
|
|
|
|
m_freem(m);
|
|
|
|
if (opts)
|
|
|
|
m_freem(opts);
|
|
|
|
return IPPROTO_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
udp6_ctlinput(cmd, sa, d)
|
|
|
|
int cmd;
|
|
|
|
struct sockaddr *sa;
|
|
|
|
void *d;
|
|
|
|
{
|
|
|
|
struct udphdr uh;
|
|
|
|
struct ip6_hdr *ip6;
|
|
|
|
struct mbuf *m;
|
2000-07-04 16:35:15 +00:00
|
|
|
int off = 0;
|
2001-06-11 12:39:29 +00:00
|
|
|
struct ip6ctlparam *ip6cp = NULL;
|
|
|
|
const struct sockaddr_in6 *sa6_src = NULL;
|
2004-02-13 14:50:01 +00:00
|
|
|
void *cmdarg;
|
2002-06-14 08:35:21 +00:00
|
|
|
struct inpcb *(*notify) __P((struct inpcb *, int)) = udp_notify;
|
2001-06-11 12:39:29 +00:00
|
|
|
struct udp_portonly {
|
|
|
|
u_int16_t uh_sport;
|
|
|
|
u_int16_t uh_dport;
|
|
|
|
} *uhp;
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
if (sa->sa_family != AF_INET6 ||
|
|
|
|
sa->sa_len != sizeof(struct sockaddr_in6))
|
|
|
|
return;
|
|
|
|
|
2000-07-04 16:35:15 +00:00
|
|
|
if ((unsigned)cmd >= PRC_NCMDS)
|
|
|
|
return;
|
|
|
|
if (PRC_IS_REDIRECT(cmd))
|
|
|
|
notify = in6_rtchange, d = NULL;
|
|
|
|
else if (cmd == PRC_HOSTDEAD)
|
|
|
|
d = NULL;
|
|
|
|
else if (inet6ctlerrmap[cmd] == 0)
|
1999-12-07 17:39:16 +00:00
|
|
|
return;
|
|
|
|
|
|
|
|
/* if the parameter is from icmp6, decode it. */
|
|
|
|
if (d != NULL) {
|
2001-06-11 12:39:29 +00:00
|
|
|
ip6cp = (struct ip6ctlparam *)d;
|
1999-12-07 17:39:16 +00:00
|
|
|
m = ip6cp->ip6c_m;
|
|
|
|
ip6 = ip6cp->ip6c_ip6;
|
|
|
|
off = ip6cp->ip6c_off;
|
2004-02-13 14:50:01 +00:00
|
|
|
cmdarg = ip6cp->ip6c_cmdarg;
|
2001-06-11 12:39:29 +00:00
|
|
|
sa6_src = ip6cp->ip6c_src;
|
1999-12-07 17:39:16 +00:00
|
|
|
} else {
|
|
|
|
m = NULL;
|
|
|
|
ip6 = NULL;
|
2004-02-13 14:50:01 +00:00
|
|
|
cmdarg = NULL;
|
2001-06-11 12:39:29 +00:00
|
|
|
sa6_src = &sa6_any;
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (ip6) {
|
|
|
|
/*
|
|
|
|
* XXX: We assume that when IPV6 is non NULL,
|
|
|
|
* M and OFF are valid.
|
|
|
|
*/
|
|
|
|
|
2000-10-23 07:11:01 +00:00
|
|
|
/* check if we can safely examine src and dst ports */
|
2001-06-11 12:39:29 +00:00
|
|
|
if (m->m_pkthdr.len < off + sizeof(*uhp))
|
2000-10-23 07:11:01 +00:00
|
|
|
return;
|
|
|
|
|
2001-06-11 12:39:29 +00:00
|
|
|
bzero(&uh, sizeof(uh));
|
|
|
|
m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
|
|
|
|
|
2002-02-04 17:40:36 +00:00
|
|
|
(void) in6_pcbnotify(&udb, sa, uh.uh_dport,
|
2004-02-13 14:50:01 +00:00
|
|
|
(struct sockaddr *)ip6cp->ip6c_src,
|
|
|
|
uh.uh_sport, cmd, cmdarg, notify);
|
1999-12-07 17:39:16 +00:00
|
|
|
} else
|
2002-02-27 02:44:45 +00:00
|
|
|
(void) in6_pcbnotify(&udb, sa, 0,
|
|
|
|
(const struct sockaddr *)sa6_src,
|
2004-02-13 14:50:01 +00:00
|
|
|
0, cmd, cmdarg, notify);
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2000-07-04 11:25:35 +00:00
|
|
|
udp6_getcred(SYSCTL_HANDLER_ARGS)
|
1999-12-07 17:39:16 +00:00
|
|
|
{
|
2001-02-18 13:30:20 +00:00
|
|
|
struct xucred xuc;
|
1999-12-07 17:39:16 +00:00
|
|
|
struct sockaddr_in6 addrs[2];
|
|
|
|
struct inpcb *inp;
|
|
|
|
int error, s;
|
|
|
|
|
2002-04-01 21:31:13 +00:00
|
|
|
error = suser(req->td);
|
1999-12-07 17:39:16 +00:00
|
|
|
if (error)
|
|
|
|
return (error);
|
2000-07-04 16:35:15 +00:00
|
|
|
|
|
|
|
if (req->newlen != sizeof(addrs))
|
|
|
|
return (EINVAL);
|
2001-02-18 13:30:20 +00:00
|
|
|
if (req->oldlen != sizeof(struct xucred))
|
2000-07-04 16:35:15 +00:00
|
|
|
return (EINVAL);
|
1999-12-07 17:39:16 +00:00
|
|
|
error = SYSCTL_IN(req, addrs, sizeof(addrs));
|
|
|
|
if (error)
|
|
|
|
return (error);
|
|
|
|
s = splnet();
|
|
|
|
inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
|
|
|
|
addrs[1].sin6_port,
|
|
|
|
&addrs[0].sin6_addr, addrs[0].sin6_port,
|
|
|
|
1, NULL);
|
1999-12-22 19:13:38 +00:00
|
|
|
if (!inp || !inp->inp_socket) {
|
1999-12-07 17:39:16 +00:00
|
|
|
error = ENOENT;
|
|
|
|
goto out;
|
|
|
|
}
|
2002-02-27 04:45:37 +00:00
|
|
|
cru2x(inp->inp_socket->so_cred, &xuc);
|
2001-02-18 13:30:20 +00:00
|
|
|
error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
|
1999-12-07 17:39:16 +00:00
|
|
|
out:
|
|
|
|
splx(s);
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
|
|
|
|
0, 0,
|
2001-02-18 13:30:20 +00:00
|
|
|
udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection");
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
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
|
2001-09-12 08:38:13 +00:00
|
|
|
udp6_attach(struct socket *so, int proto, struct thread *td)
|
1999-12-07 17:39:16 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
int s, error;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
if (inp != 0)
|
|
|
|
return EINVAL;
|
|
|
|
|
|
|
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
|
|
|
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
s = splnet();
|
2004-03-27 20:41:32 +00:00
|
|
|
error = in_pcballoc(so, &udbinfo, "udp6inp");
|
1999-12-07 17:39:16 +00:00
|
|
|
splx(s);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
inp = (struct inpcb *)so->so_pcb;
|
|
|
|
inp->inp_vflag |= INP_IPV6;
|
2002-07-25 17:40:45 +00:00
|
|
|
if (!ip6_v6only)
|
2002-07-15 19:25:46 +00:00
|
|
|
inp->inp_vflag |= INP_IPV4;
|
1999-12-07 17:39:16 +00:00
|
|
|
inp->in6p_hops = -1; /* use kernel default */
|
|
|
|
inp->in6p_cksum = -1; /* just to be sure */
|
2000-06-22 16:48:59 +00:00
|
|
|
/*
|
|
|
|
* 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;
|
1999-12-07 17:39:16 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2001-09-12 08:38:13 +00:00
|
|
|
udp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
|
1999-12-07 17:39:16 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
int s, error;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
if (inp == 0)
|
|
|
|
return EINVAL;
|
|
|
|
|
|
|
|
inp->inp_vflag &= ~INP_IPV4;
|
|
|
|
inp->inp_vflag |= INP_IPV6;
|
2001-06-11 12:39:29 +00:00
|
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
|
1999-12-07 17:39:16 +00:00
|
|
|
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();
|
2001-09-12 08:38:13 +00:00
|
|
|
error = in_pcbbind(inp, (struct sockaddr *)&sin, td);
|
1999-12-07 17:39:16 +00:00
|
|
|
splx(s);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
s = splnet();
|
2001-09-12 08:38:13 +00:00
|
|
|
error = in6_pcbbind(inp, nam, td);
|
1999-12-07 17:39:16 +00:00
|
|
|
splx(s);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2001-09-12 08:38:13 +00:00
|
|
|
udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
|
1999-12-07 17:39:16 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
int s, error;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
if (inp == 0)
|
|
|
|
return EINVAL;
|
2001-06-11 12:39:29 +00:00
|
|
|
|
|
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
|
1999-12-07 17:39:16 +00:00
|
|
|
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();
|
2001-09-12 08:38:13 +00:00
|
|
|
error = in_pcbconnect(inp, (struct sockaddr *)&sin, td);
|
1999-12-07 17:39:16 +00:00
|
|
|
splx(s);
|
1999-12-21 11:14:12 +00:00
|
|
|
if (error == 0) {
|
1999-12-07 17:39:16 +00:00
|
|
|
inp->inp_vflag |= INP_IPV4;
|
|
|
|
inp->inp_vflag &= ~INP_IPV6;
|
|
|
|
soisconnected(so);
|
|
|
|
}
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
|
|
|
|
return EISCONN;
|
|
|
|
s = splnet();
|
2001-09-12 08:38:13 +00:00
|
|
|
error = in6_pcbconnect(inp, nam, td);
|
1999-12-07 17:39:16 +00:00
|
|
|
splx(s);
|
1999-12-21 11:14:12 +00:00
|
|
|
if (error == 0) {
|
2002-07-25 17:40:45 +00:00
|
|
|
if (!ip6_v6only) { /* should be non mapped addr */
|
2001-06-11 12:39:29 +00:00
|
|
|
inp->inp_vflag &= ~INP_IPV4;
|
|
|
|
inp->inp_vflag |= INP_IPV6;
|
|
|
|
}
|
1999-12-07 17:39:16 +00:00
|
|
|
soisconnected(so);
|
|
|
|
}
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
udp6_detach(struct socket *so)
|
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
int s;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
if (inp == 0)
|
|
|
|
return EINVAL;
|
|
|
|
s = splnet();
|
|
|
|
in6_pcbdetach(inp);
|
|
|
|
splx(s);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
udp6_disconnect(struct socket *so)
|
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
int s;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
if (inp == 0)
|
|
|
|
return EINVAL;
|
|
|
|
|
2004-02-13 15:11:47 +00:00
|
|
|
#ifdef INET
|
1999-12-07 17:39:16 +00:00
|
|
|
if (inp->inp_vflag & INP_IPV4) {
|
|
|
|
struct pr_usrreqs *pru;
|
|
|
|
|
|
|
|
pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
|
|
|
|
return ((*pru->pru_disconnect)(so));
|
|
|
|
}
|
2004-02-13 15:11:47 +00:00
|
|
|
#endif
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
|
|
|
|
return ENOTCONN;
|
|
|
|
|
|
|
|
s = splnet();
|
|
|
|
in6_pcbdisconnect(inp);
|
|
|
|
inp->in6p_laddr = in6addr_any;
|
|
|
|
splx(s);
|
|
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
|
2001-09-12 08:38:13 +00:00
|
|
|
struct mbuf *control, struct thread *td)
|
1999-12-07 17:39:16 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
2000-07-04 16:35:15 +00:00
|
|
|
int error = 0;
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
if (inp == 0) {
|
2000-07-04 16:35:15 +00:00
|
|
|
error = EINVAL;
|
|
|
|
goto bad;
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
|
2000-07-04 16:35:15 +00:00
|
|
|
if (addr) {
|
|
|
|
if (addr->sa_len != sizeof(struct sockaddr_in6)) {
|
|
|
|
error = EINVAL;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
if (addr->sa_family != AF_INET6) {
|
|
|
|
error = EAFNOSUPPORT;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-02-13 15:11:47 +00:00
|
|
|
#ifdef INET
|
2002-07-25 17:40:45 +00:00
|
|
|
if (!ip6_v6only) {
|
1999-12-07 17:39:16 +00:00
|
|
|
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;
|
|
|
|
|
2004-02-13 15:11:47 +00:00
|
|
|
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.
|
|
|
|
*/
|
|
|
|
return EINVAL;
|
|
|
|
}
|
|
|
|
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.
|
|
|
|
*/
|
|
|
|
return EINVAL;
|
|
|
|
}
|
1999-12-07 17:39:16 +00:00
|
|
|
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,
|
2001-09-12 08:38:13 +00:00
|
|
|
td));
|
1999-12-07 17:39:16 +00:00
|
|
|
/* addr will just be freed in sendit(). */
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
}
|
2004-02-13 15:11:47 +00:00
|
|
|
#endif
|
1999-12-07 17:39:16 +00:00
|
|
|
|
2001-09-12 08:38:13 +00:00
|
|
|
return udp6_output(inp, m, addr, control, td);
|
2000-07-04 16:35:15 +00:00
|
|
|
|
|
|
|
bad:
|
|
|
|
m_freem(m);
|
2003-10-06 14:02:09 +00:00
|
|
|
return (error);
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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,
|
Introduce a MAC label reference in 'struct inpcb', which caches
the MAC label referenced from 'struct socket' in the IPv4 and
IPv6-based protocols. This permits MAC labels to be checked during
network delivery operations without dereferencing inp->inp_socket
to get to so->so_label, which will eventually avoid our having to
grab the socket lock during delivery at the network layer.
This change introduces 'struct inpcb' as a labeled object to the
MAC Framework, along with the normal circus of entry points:
initialization, creation from socket, destruction, as well as a
delivery access control check.
For most policies, the inpcb label will simply be a cache of the
socket label, so a new protocol switch method is introduced,
pr_sosetlabel() to notify protocols that the socket layer label
has been updated so that the cache can be updated while holding
appropriate locks. Most protocols implement this using
pru_sosetlabel_null(), but IPv4/IPv6 protocols using inpcbs use
the the worker function in_pcbsosetlabel(), which calls into the
MAC Framework to perform a cache update.
Biba, LOMAC, and MLS implement these entry points, as do the stub
policy, and test policy.
Reviewed by: sam, bms
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
2003-11-18 00:39:07 +00:00
|
|
|
in6_mapped_sockaddr, sosend, soreceive, sopoll, in_pcbsosetlabel
|
1999-12-07 17:39:16 +00:00
|
|
|
};
|