2005-01-07 01:45:51 +00:00
|
|
|
/*-
|
1995-09-22 19:56:26 +00:00
|
|
|
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
|
2007-02-20 10:13:11 +00:00
|
|
|
* The Regents of the University of California.
|
|
|
|
* All rights reserved.
|
1994-05-24 10:09:53 +00:00
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
* are met:
|
|
|
|
* 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
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
|
|
* may be used to endorse or promote products derived from this software
|
|
|
|
* without specific prior written permission.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
* SUCH DAMAGE.
|
|
|
|
*
|
1995-09-22 19:56:26 +00:00
|
|
|
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
|
1999-08-28 01:08:13 +00:00
|
|
|
* $FreeBSD$
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
|
2006-01-24 09:08:54 +00:00
|
|
|
#include "opt_ipfw.h"
|
1999-12-22 19:13:38 +00:00
|
|
|
#include "opt_ipsec.h"
|
1999-12-07 17:39:16 +00:00
|
|
|
#include "opt_inet6.h"
|
2002-08-01 21:37:34 +00:00
|
|
|
#include "opt_mac.h"
|
1999-12-07 17:39:16 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/param.h>
|
1994-05-25 09:21:21 +00:00
|
|
|
#include <sys/systm.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/domain.h>
|
2006-04-21 09:25:40 +00:00
|
|
|
#include <sys/eventhandler.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/jail.h>
|
1997-02-24 20:31:25 +00:00
|
|
|
#include <sys/kernel.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/lock.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/malloc.h>
|
|
|
|
#include <sys/mbuf.h>
|
2006-11-06 13:42:10 +00:00
|
|
|
#include <sys/priv.h>
|
1999-07-11 18:32:46 +00:00
|
|
|
#include <sys/proc.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/protosw.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/signalvar.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <sys/socketvar.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <sys/sx.h>
|
1995-03-16 18:17:34 +00:00
|
|
|
#include <sys/sysctl.h>
|
1996-04-04 10:46:44 +00:00
|
|
|
#include <sys/syslog.h>
|
1998-03-28 10:18:26 +00:00
|
|
|
|
2002-03-20 05:48:55 +00:00
|
|
|
#include <vm/uma.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <net/route.h>
|
|
|
|
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <netinet/in_systm.h>
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <netinet/in_pcb.h>
|
|
|
|
#include <netinet/in_var.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <netinet/ip.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#ifdef INET6
|
|
|
|
#include <netinet/ip6.h>
|
|
|
|
#endif
|
2002-04-30 01:54:54 +00:00
|
|
|
#include <netinet/ip_icmp.h>
|
|
|
|
#include <netinet/icmp_var.h>
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <netinet/ip_var.h>
|
2005-11-18 20:12:40 +00:00
|
|
|
#include <netinet/ip_options.h>
|
1999-12-07 17:39:16 +00:00
|
|
|
#ifdef INET6
|
|
|
|
#include <netinet6/ip6_var.h>
|
|
|
|
#endif
|
1994-05-24 10:09:53 +00:00
|
|
|
#include <netinet/udp.h>
|
|
|
|
#include <netinet/udp_var.h>
|
|
|
|
|
2007-07-03 12:13:45 +00:00
|
|
|
#ifdef IPSEC
|
2002-10-16 02:25:05 +00:00
|
|
|
#include <netipsec/ipsec.h>
|
2007-02-20 10:13:11 +00:00
|
|
|
#endif
|
2002-10-16 02:25:05 +00:00
|
|
|
|
2000-03-27 19:14:27 +00:00
|
|
|
#include <machine/in_cksum.h>
|
|
|
|
|
2006-10-22 11:52:19 +00:00
|
|
|
#include <security/mac/mac_framework.h>
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* UDP protocol implementation.
|
|
|
|
* Per RFC 768, August, 1980.
|
|
|
|
*/
|
2006-12-31 21:34:53 +00:00
|
|
|
|
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums
|
|
|
|
* removes the only data integrity mechanism for packets and malformed
|
|
|
|
* packets that would otherwise be discarded by bad checksums may cause
|
|
|
|
* problems (especially for NFS data blocks).
|
2006-12-31 21:34:53 +00:00
|
|
|
*/
|
1995-11-14 20:34:56 +00:00
|
|
|
static int udpcksum = 1;
|
2007-02-20 10:13:11 +00:00
|
|
|
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, &udpcksum,
|
|
|
|
0, "");
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2007-02-20 10:20:03 +00:00
|
|
|
int udp_log_in_vain = 0;
|
2004-08-16 18:32:07 +00:00
|
|
|
SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
|
2007-02-20 10:20:03 +00:00
|
|
|
&udp_log_in_vain, 0, "Log all incoming UDP packets");
|
1996-04-04 10:46:44 +00:00
|
|
|
|
2007-07-10 09:30:46 +00:00
|
|
|
int udp_blackhole = 0;
|
|
|
|
SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW, &udp_blackhole, 0,
|
2007-02-20 10:13:11 +00:00
|
|
|
"Do not send port unreachables for refused connects");
|
1999-08-17 12:17:53 +00:00
|
|
|
|
2007-07-10 09:30:46 +00:00
|
|
|
u_long udp_sendspace = 9216; /* really max datagram size */
|
|
|
|
/* 40 1K datagrams */
|
|
|
|
SYSCTL_ULONG(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
|
|
|
|
&udp_sendspace, 0, "Maximum outgoing UDP datagram size");
|
|
|
|
|
|
|
|
u_long udp_recvspace = 40 * (1024 +
|
|
|
|
#ifdef INET6
|
|
|
|
sizeof(struct sockaddr_in6)
|
|
|
|
#else
|
|
|
|
sizeof(struct sockaddr_in)
|
|
|
|
#endif
|
|
|
|
);
|
|
|
|
|
|
|
|
SYSCTL_ULONG(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
|
|
|
|
&udp_recvspace, 0, "Maximum space for incoming UDP datagrams");
|
|
|
|
|
2007-05-07 13:47:39 +00:00
|
|
|
struct inpcbhead udb; /* from udp_var.h */
|
|
|
|
struct inpcbinfo udbinfo;
|
1995-04-09 01:29:31 +00:00
|
|
|
|
|
|
|
#ifndef UDBHASHSIZE
|
2007-05-07 13:47:39 +00:00
|
|
|
#define UDBHASHSIZE 16
|
1995-04-09 01:29:31 +00:00
|
|
|
#endif
|
|
|
|
|
2007-05-07 13:47:39 +00:00
|
|
|
struct udpstat udpstat; /* from udp_var.h */
|
2007-02-20 10:13:11 +00:00
|
|
|
SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW, &udpstat,
|
|
|
|
udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
|
1995-02-16 00:27:47 +00:00
|
|
|
|
2007-02-20 10:13:11 +00:00
|
|
|
static void udp_detach(struct socket *so);
|
|
|
|
static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
|
|
|
|
struct mbuf *, struct thread *);
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2006-04-21 09:25:40 +00:00
|
|
|
static void
|
|
|
|
udp_zone_change(void *tag)
|
|
|
|
{
|
|
|
|
|
|
|
|
uma_zone_set_max(udbinfo.ipi_zone, maxsockets);
|
|
|
|
}
|
|
|
|
|
2006-07-18 22:34:27 +00:00
|
|
|
static int
|
|
|
|
udp_inpcb_init(void *mem, int size, int flags)
|
|
|
|
{
|
2007-05-07 13:47:39 +00:00
|
|
|
struct inpcb *inp;
|
2006-12-29 14:58:18 +00:00
|
|
|
|
2007-05-07 13:47:39 +00:00
|
|
|
inp = mem;
|
2006-07-18 22:34:27 +00:00
|
|
|
INP_LOCK_INIT(inp, "inp", "udpinp");
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
void
|
2007-05-07 13:47:39 +00:00
|
|
|
udp_init(void)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
2007-05-07 13:47:39 +00:00
|
|
|
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_LOCK_INIT(&udbinfo, "udp");
|
1995-04-09 01:29:31 +00:00
|
|
|
LIST_INIT(&udb);
|
2007-04-30 23:12:05 +00:00
|
|
|
udbinfo.ipi_listhead = &udb;
|
|
|
|
udbinfo.ipi_hashbase = hashinit(UDBHASHSIZE, M_PCB,
|
|
|
|
&udbinfo.ipi_hashmask);
|
|
|
|
udbinfo.ipi_porthashbase = hashinit(UDBHASHSIZE, M_PCB,
|
|
|
|
&udbinfo.ipi_porthashmask);
|
2002-03-20 05:48:55 +00:00
|
|
|
udbinfo.ipi_zone = uma_zcreate("udpcb", sizeof(struct inpcb), NULL,
|
2006-07-18 22:34:27 +00:00
|
|
|
NULL, udp_inpcb_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
|
2002-03-20 05:48:55 +00:00
|
|
|
uma_zone_set_max(udbinfo.ipi_zone, maxsockets);
|
2006-04-21 09:25:40 +00:00
|
|
|
EVENTHANDLER_REGISTER(maxsockets_change, udp_zone_change, NULL,
|
2007-05-07 13:47:39 +00:00
|
|
|
EVENTHANDLER_PRI_ANY);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
2007-07-10 09:30:46 +00:00
|
|
|
/*
|
|
|
|
* Subroutine of udp_input(), which appends the provided mbuf chain to the
|
|
|
|
* passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
|
|
|
|
* contains the source address. If the socket ends up being an IPv6 socket,
|
|
|
|
* udp_append() will convert to a sockaddr_in6 before passing the address
|
|
|
|
* into the socket code.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
|
|
|
|
struct sockaddr_in *udp_in)
|
|
|
|
{
|
|
|
|
struct sockaddr *append_sa;
|
|
|
|
struct socket *so;
|
|
|
|
struct mbuf *opts = 0;
|
|
|
|
#ifdef INET6
|
|
|
|
struct sockaddr_in6 udp_in6;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
|
|
|
|
#ifdef IPSEC
|
|
|
|
/* Check AH/ESP integrity. */
|
|
|
|
if (ipsec4_in_reject(n, inp)) {
|
|
|
|
m_freem(n);
|
|
|
|
ipsec4stat.in_polvio++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
#endif /* IPSEC */
|
|
|
|
#ifdef MAC
|
|
|
|
if (mac_check_inpcb_deliver(inp, n) != 0) {
|
|
|
|
m_freem(n);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
if (inp->inp_flags & INP_CONTROLOPTS ||
|
|
|
|
inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
|
|
|
|
#ifdef INET6
|
|
|
|
if (inp->inp_vflag & INP_IPV6) {
|
|
|
|
int savedflags;
|
|
|
|
|
|
|
|
savedflags = inp->inp_flags;
|
|
|
|
inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
|
|
|
|
ip6_savecontrol(inp, n, &opts);
|
|
|
|
inp->inp_flags = savedflags;
|
|
|
|
} else
|
|
|
|
#endif
|
|
|
|
ip_savecontrol(inp, &opts, ip, n);
|
|
|
|
}
|
|
|
|
#ifdef INET6
|
|
|
|
if (inp->inp_vflag & INP_IPV6) {
|
|
|
|
bzero(&udp_in6, sizeof(udp_in6));
|
|
|
|
udp_in6.sin6_len = sizeof(udp_in6);
|
|
|
|
udp_in6.sin6_family = AF_INET6;
|
|
|
|
in6_sin_2_v4mapsin6(udp_in, &udp_in6);
|
|
|
|
append_sa = (struct sockaddr *)&udp_in6;
|
|
|
|
} else
|
|
|
|
#endif
|
|
|
|
append_sa = (struct sockaddr *)udp_in;
|
|
|
|
m_adj(n, off);
|
|
|
|
|
|
|
|
so = inp->inp_socket;
|
|
|
|
SOCKBUF_LOCK(&so->so_rcv);
|
|
|
|
if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
|
|
|
|
SOCKBUF_UNLOCK(&so->so_rcv);
|
|
|
|
m_freem(n);
|
|
|
|
if (opts)
|
|
|
|
m_freem(opts);
|
|
|
|
udpstat.udps_fullsock++;
|
|
|
|
} else
|
|
|
|
sorwakeup_locked(so);
|
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
void
|
2007-02-20 10:13:11 +00:00
|
|
|
udp_input(struct mbuf *m, int off)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
1999-12-07 17:39:16 +00:00
|
|
|
int iphlen = off;
|
2007-02-20 10:13:11 +00:00
|
|
|
struct ip *ip;
|
|
|
|
struct udphdr *uh;
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
struct ifnet *ifp;
|
2007-02-20 10:13:11 +00:00
|
|
|
struct inpcb *inp;
|
1994-05-24 10:09:53 +00:00
|
|
|
int len;
|
|
|
|
struct ip save_ip;
|
Until this change, the UDP input code used global variables udp_in,
udp_in6, and udp_ip6 to pass socket address state between udp_input(),
udp_append(), and soappendaddr_locked(). While file in the default
configuration, when running with multiple netisrs or direct ithread
dispatch, this can result in races wherein user processes using
recvmsg() get back the wrong source IP/port. To correct this and
related races:
- Eliminate udp_ip6, which is believed to be generated but then never
used. Eliminate ip_2_ip6_hdr() as it is now unneeded.
- Eliminate setting, testing, and existence of 'init' status fields
for the IPv6 structures. While with multiple UDP delivery this
could lead to amortization of IPv4 -> IPv6 conversion when
delivering an IPv4 UDP packet to an IPv6 socket, it added
substantial complexity and side effects.
- Move global structures into the stack, declaring udp_in in
udp_input(), and udp_in6 in udp_append() to be used if a conversion
is required. Pass &udp_in into udp_append().
- Re-annotate comments to reflect updates.
With this change, UDP appears to operate correctly in the presence of
substantial inbound processing parallelism. This solution avoids
introducing additional synchronization, but does increase the
potential stack depth.
Discovered by: kris (Bug Magnet)
MFC after: 3 weeks
2004-11-04 01:25:23 +00:00
|
|
|
struct sockaddr_in udp_in;
|
2006-01-24 09:08:54 +00:00
|
|
|
#ifdef IPFIREWALL_FORWARD
|
|
|
|
struct m_tag *fwd_tag;
|
|
|
|
#endif
|
1994-05-24 10:09:53 +00:00
|
|
|
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
ifp = m->m_pkthdr.rcvif;
|
1994-05-24 10:09:53 +00:00
|
|
|
udpstat.udps_ipackets++;
|
|
|
|
|
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* Strip IP options, if any; should skip this, make available to
|
|
|
|
* user, and use on returned packets, but we don't yet have a way to
|
|
|
|
* check the checksum with options still present.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
if (iphlen > sizeof (struct ip)) {
|
|
|
|
ip_stripoptions(m, (struct mbuf *)0);
|
|
|
|
iphlen = sizeof(struct ip);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get IP and UDP header together in first mbuf.
|
|
|
|
*/
|
|
|
|
ip = mtod(m, struct ip *);
|
|
|
|
if (m->m_len < iphlen + sizeof(struct udphdr)) {
|
|
|
|
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
|
|
|
|
udpstat.udps_hdrops++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
ip = mtod(m, struct ip *);
|
|
|
|
}
|
|
|
|
uh = (struct udphdr *)((caddr_t)ip + iphlen);
|
|
|
|
|
2007-02-20 10:13:11 +00:00
|
|
|
/*
|
|
|
|
* Destination port of 0 is illegal, based on RFC768.
|
|
|
|
*/
|
2000-07-04 16:35:15 +00:00
|
|
|
if (uh->uh_dport == 0)
|
2002-06-10 20:05:46 +00:00
|
|
|
goto badunlocked;
|
2000-07-04 16:35:15 +00:00
|
|
|
|
2002-10-16 02:25:05 +00:00
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* Construct sockaddr format source address. Stuff source address
|
|
|
|
* and datagram in user buffer.
|
2002-10-16 02:25:05 +00:00
|
|
|
*/
|
Until this change, the UDP input code used global variables udp_in,
udp_in6, and udp_ip6 to pass socket address state between udp_input(),
udp_append(), and soappendaddr_locked(). While file in the default
configuration, when running with multiple netisrs or direct ithread
dispatch, this can result in races wherein user processes using
recvmsg() get back the wrong source IP/port. To correct this and
related races:
- Eliminate udp_ip6, which is believed to be generated but then never
used. Eliminate ip_2_ip6_hdr() as it is now unneeded.
- Eliminate setting, testing, and existence of 'init' status fields
for the IPv6 structures. While with multiple UDP delivery this
could lead to amortization of IPv4 -> IPv6 conversion when
delivering an IPv4 UDP packet to an IPv6 socket, it added
substantial complexity and side effects.
- Move global structures into the stack, declaring udp_in in
udp_input(), and udp_in6 in udp_append() to be used if a conversion
is required. Pass &udp_in into udp_append().
- Re-annotate comments to reflect updates.
With this change, UDP appears to operate correctly in the presence of
substantial inbound processing parallelism. This solution avoids
introducing additional synchronization, but does increase the
potential stack depth.
Discovered by: kris (Bug Magnet)
MFC after: 3 weeks
2004-11-04 01:25:23 +00:00
|
|
|
bzero(&udp_in, sizeof(udp_in));
|
|
|
|
udp_in.sin_len = sizeof(udp_in);
|
|
|
|
udp_in.sin_family = AF_INET;
|
2002-10-16 02:25:05 +00:00
|
|
|
udp_in.sin_port = uh->uh_sport;
|
|
|
|
udp_in.sin_addr = ip->ip_src;
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
2007-05-07 13:47:39 +00:00
|
|
|
* Make mbuf data length reflect UDP length. If not enough data to
|
|
|
|
* reflect UDP length, drop.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
len = ntohs((u_short)uh->uh_ulen);
|
|
|
|
if (ip->ip_len != len) {
|
1995-08-17 22:09:14 +00:00
|
|
|
if (len > ip->ip_len || len < sizeof(struct udphdr)) {
|
1994-05-24 10:09:53 +00:00
|
|
|
udpstat.udps_badlen++;
|
2002-06-10 20:05:46 +00:00
|
|
|
goto badunlocked;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
m_adj(m, len - ip->ip_len);
|
|
|
|
/* ip->ip_len = len; */
|
|
|
|
}
|
2007-02-20 10:13:11 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* Save a copy of the IP header in case we want restore it for
|
|
|
|
* sending an ICMP error message in response.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
2007-07-10 09:30:46 +00:00
|
|
|
if (!udp_blackhole)
|
2000-10-31 09:13:02 +00:00
|
|
|
save_ip = *ip;
|
2007-06-17 04:07:11 +00:00
|
|
|
else
|
|
|
|
memset(&save_ip, 0, sizeof(save_ip));
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Checksum extended UDP header and data.
|
|
|
|
*/
|
1995-09-22 19:56:26 +00:00
|
|
|
if (uh->uh_sum) {
|
2007-05-16 09:12:16 +00:00
|
|
|
u_short uh_sum;
|
|
|
|
|
2000-03-27 19:14:27 +00:00
|
|
|
if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
|
|
|
|
if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
|
2007-05-16 09:12:16 +00:00
|
|
|
uh_sum = m->m_pkthdr.csum_data;
|
2000-03-27 19:14:27 +00:00
|
|
|
else
|
2007-05-16 09:12:16 +00:00
|
|
|
uh_sum = in_pseudo(ip->ip_src.s_addr,
|
2000-11-01 16:56:33 +00:00
|
|
|
ip->ip_dst.s_addr, htonl((u_short)len +
|
2000-03-27 19:14:27 +00:00
|
|
|
m->m_pkthdr.csum_data + IPPROTO_UDP));
|
2007-05-16 09:12:16 +00:00
|
|
|
uh_sum ^= 0xffff;
|
2000-03-27 19:14:27 +00:00
|
|
|
} else {
|
2001-10-22 12:43:30 +00:00
|
|
|
char b[9];
|
2007-05-07 13:47:39 +00:00
|
|
|
|
2001-10-22 12:43:30 +00:00
|
|
|
bcopy(((struct ipovly *)ip)->ih_x1, b, 9);
|
2000-03-27 19:14:27 +00:00
|
|
|
bzero(((struct ipovly *)ip)->ih_x1, 9);
|
|
|
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen;
|
2007-05-16 09:12:16 +00:00
|
|
|
uh_sum = in_cksum(m, len + sizeof (struct ip));
|
2001-10-22 12:43:30 +00:00
|
|
|
bcopy(b, ((struct ipovly *)ip)->ih_x1, 9);
|
2000-03-27 19:14:27 +00:00
|
|
|
}
|
2007-05-16 09:12:16 +00:00
|
|
|
if (uh_sum) {
|
1994-05-24 10:09:53 +00:00
|
|
|
udpstat.udps_badsum++;
|
|
|
|
m_freem(m);
|
|
|
|
return;
|
|
|
|
}
|
2001-03-13 13:26:06 +00:00
|
|
|
} else
|
|
|
|
udpstat.udps_nosum++;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2006-01-24 09:08:54 +00:00
|
|
|
#ifdef IPFIREWALL_FORWARD
|
2007-02-20 10:13:11 +00:00
|
|
|
/*
|
|
|
|
* Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
|
|
|
|
*/
|
2006-01-24 09:08:54 +00:00
|
|
|
fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL);
|
|
|
|
if (fwd_tag != NULL) {
|
|
|
|
struct sockaddr_in *next_hop;
|
|
|
|
|
2007-02-20 10:13:11 +00:00
|
|
|
/*
|
|
|
|
* Do the hack.
|
|
|
|
*/
|
2006-01-24 09:08:54 +00:00
|
|
|
next_hop = (struct sockaddr_in *)(fwd_tag + 1);
|
|
|
|
ip->ip_dst = next_hop->sin_addr;
|
|
|
|
uh->uh_dport = ntohs(next_hop->sin_port);
|
2007-02-20 10:13:11 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Remove the tag from the packet. We don't need it anymore.
|
|
|
|
*/
|
2006-01-24 09:08:54 +00:00
|
|
|
m_tag_delete(m, fwd_tag);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RLOCK(&udbinfo);
|
1994-05-24 10:09:53 +00:00
|
|
|
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
in_broadcast(ip->ip_dst, ifp)) {
|
1996-11-11 04:56:32 +00:00
|
|
|
struct inpcb *last;
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
struct ip_moptions *imo;
|
2007-02-20 10:13:11 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
last = NULL;
|
1999-12-07 17:39:16 +00:00
|
|
|
LIST_FOREACH(inp, &udb, inp_list) {
|
2004-08-06 02:08:31 +00:00
|
|
|
if (inp->inp_lport != uh->uh_dport)
|
2002-06-10 20:05:46 +00:00
|
|
|
continue;
|
1999-12-07 17:39:16 +00:00
|
|
|
#ifdef INET6
|
1999-12-21 11:14:12 +00:00
|
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
2004-08-06 02:08:31 +00:00
|
|
|
continue;
|
1999-12-07 17:39:16 +00:00
|
|
|
#endif
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
if (inp->inp_laddr.s_addr != INADDR_ANY &&
|
|
|
|
inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
|
2007-07-10 09:30:46 +00:00
|
|
|
continue;
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY &&
|
|
|
|
inp->inp_faddr.s_addr != ip->ip_src.s_addr)
|
2007-07-10 09:30:46 +00:00
|
|
|
continue;
|
2003-11-12 20:17:11 +00:00
|
|
|
/*
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
* XXX: Do not check source port of incoming datagram
|
|
|
|
* unless inp_connect() has been called to bind the
|
|
|
|
* fport part of the 4-tuple; the source could be
|
|
|
|
* trying to talk to us with an ephemeral port.
|
2003-11-12 20:17:11 +00:00
|
|
|
*/
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
if (inp->inp_fport != 0 &&
|
|
|
|
inp->inp_fport != uh->uh_sport)
|
2007-07-10 09:30:46 +00:00
|
|
|
continue;
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
|
2007-02-20 10:13:11 +00:00
|
|
|
INP_LOCK(inp);
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Handle socket delivery policy for any-source
|
|
|
|
* and source-specific multicast. [RFC3678]
|
|
|
|
*/
|
|
|
|
imo = inp->inp_moptions;
|
|
|
|
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
|
|
|
|
imo != NULL) {
|
|
|
|
struct sockaddr_in sin;
|
|
|
|
struct in_msource *ims;
|
|
|
|
int blocked, mode;
|
|
|
|
size_t idx;
|
|
|
|
|
|
|
|
bzero(&sin, sizeof(struct sockaddr_in));
|
|
|
|
sin.sin_len = sizeof(struct sockaddr_in);
|
|
|
|
sin.sin_family = AF_INET;
|
|
|
|
sin.sin_addr = ip->ip_dst;
|
|
|
|
|
|
|
|
blocked = 0;
|
|
|
|
idx = imo_match_group(imo, ifp,
|
|
|
|
(struct sockaddr *)&sin);
|
|
|
|
if (idx == -1) {
|
|
|
|
/*
|
|
|
|
* No group membership for this socket.
|
|
|
|
* Do not bump udps_noportbcast, as
|
|
|
|
* this will happen further down.
|
|
|
|
*/
|
|
|
|
blocked++;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Check for a multicast source filter
|
|
|
|
* entry on this socket for this group.
|
|
|
|
* MCAST_EXCLUDE is the default
|
|
|
|
* behaviour. It means default accept;
|
|
|
|
* entries, if present, denote sources
|
|
|
|
* to be excluded from delivery.
|
|
|
|
*/
|
|
|
|
ims = imo_match_source(imo, idx,
|
|
|
|
(struct sockaddr *)&udp_in);
|
|
|
|
mode = imo->imo_mfilters[idx].imf_fmode;
|
|
|
|
if ((ims != NULL &&
|
|
|
|
mode == MCAST_EXCLUDE) ||
|
|
|
|
(ims == NULL &&
|
|
|
|
mode == MCAST_INCLUDE)) {
|
|
|
|
#ifdef DIAGNOSTIC
|
|
|
|
if (bootverbose) {
|
|
|
|
printf("%s: blocked by"
|
|
|
|
" source filter\n",
|
|
|
|
__func__);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
udpstat.udps_filtermcast++;
|
|
|
|
blocked++;
|
2003-11-12 20:17:11 +00:00
|
|
|
}
|
|
|
|
}
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
if (blocked != 0) {
|
2004-08-06 02:08:31 +00:00
|
|
|
INP_UNLOCK(inp);
|
|
|
|
continue;
|
|
|
|
}
|
2003-11-12 20:17:11 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
if (last != NULL) {
|
|
|
|
struct mbuf *n;
|
|
|
|
|
2002-11-20 19:00:54 +00:00
|
|
|
n = m_copy(m, 0, M_COPYALL);
|
2002-10-16 02:25:05 +00:00
|
|
|
if (n != NULL)
|
2007-02-20 10:13:11 +00:00
|
|
|
udp_append(last, ip, n, iphlen +
|
|
|
|
sizeof(struct udphdr), &udp_in);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(last);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
1996-11-11 04:56:32 +00:00
|
|
|
last = inp;
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
|
|
|
* Don't look for additional matches if this one does
|
|
|
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
2007-02-20 10:13:11 +00:00
|
|
|
* 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.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
2007-02-20 10:13:11 +00:00
|
|
|
if ((last->inp_socket->so_options &
|
|
|
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0)
|
1994-05-24 10:09:53 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (last == NULL) {
|
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* No matching pcb found; discard datagram. (No need
|
|
|
|
* to send an ICMP Port Unreachable for a broadcast
|
|
|
|
* or multicast datgram.)
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
udpstat.udps_noportbcast++;
|
2002-06-12 15:21:41 +00:00
|
|
|
goto badheadlocked;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
Until this change, the UDP input code used global variables udp_in,
udp_in6, and udp_ip6 to pass socket address state between udp_input(),
udp_append(), and soappendaddr_locked(). While file in the default
configuration, when running with multiple netisrs or direct ithread
dispatch, this can result in races wherein user processes using
recvmsg() get back the wrong source IP/port. To correct this and
related races:
- Eliminate udp_ip6, which is believed to be generated but then never
used. Eliminate ip_2_ip6_hdr() as it is now unneeded.
- Eliminate setting, testing, and existence of 'init' status fields
for the IPv6 structures. While with multiple UDP delivery this
could lead to amortization of IPv4 -> IPv6 conversion when
delivering an IPv4 UDP packet to an IPv6 socket, it added
substantial complexity and side effects.
- Move global structures into the stack, declaring udp_in in
udp_input(), and udp_in6 in udp_append() to be used if a conversion
is required. Pass &udp_in into udp_append().
- Re-annotate comments to reflect updates.
With this change, UDP appears to operate correctly in the presence of
substantial inbound processing parallelism. This solution avoids
introducing additional synchronization, but does increase the
potential stack depth.
Discovered by: kris (Bug Magnet)
MFC after: 3 weeks
2004-11-04 01:25:23 +00:00
|
|
|
udp_append(last, ip, m, iphlen + sizeof(struct udphdr),
|
|
|
|
&udp_in);
|
2002-10-16 02:33:28 +00:00
|
|
|
INP_UNLOCK(last);
|
2004-10-12 20:03:56 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1994-05-24 10:09:53 +00:00
|
|
|
return;
|
|
|
|
}
|
2007-02-20 10:13:11 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
1996-10-07 19:06:12 +00:00
|
|
|
* Locate pcb for datagram.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
Improved connection establishment performance by doing local port lookups via
a hashed port list. In the new scheme, in_pcblookup() goes away and is
replaced by a new routine, in_pcblookup_local() for doing the local port
check. Note that this implementation is space inefficient in that the PCB
struct is now too large to fit into 128 bytes. I might deal with this in the
future by using the new zone allocator, but I wanted these changes to be
extensively tested in their current form first.
Also:
1) Fixed off-by-one errors in the port lookup loops in in_pcbbind().
2) Got rid of some unneeded rehashing. Adding a new routine, in_pcbinshash()
to do the initialial hash insertion.
3) Renamed in_pcblookuphash() to in_pcblookup_hash() for easier readability.
4) Added a new routine, in_pcbremlists() to remove the PCB from the various
hash lists.
5) Added/deleted comments where appropriate.
6) Removed unnecessary splnet() locking. In general, the PCB functions should
be called at splnet()...there are unfortunately a few exceptions, however.
7) Reorganized a few structs for better cache line behavior.
8) Killed my TCP_ACK_HACK kludge. It may come back in a different form in
the future, however.
These changes have been tested on wcarchive for more than a month. In tests
done here, connection establishment overhead is reduced by more than 50
times, thus getting rid of one of the major networking scalability problems.
Still to do: make tcp_fastimo/tcp_slowtimo scale well for systems with a
large number of connections. tcp_fastimo is easy; tcp_slowtimo is difficult.
WARNING: Anything that knows about inpcb and tcpcb structs will have to be
recompiled; at the very least, this includes netstat(1).
1998-01-27 09:15:13 +00:00
|
|
|
inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport,
|
Import rewrite of IPv4 socket multicast layer to support source-specific
and protocol-independent host mode multicast. The code is written to
accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work.
This change only pertains to FreeBSD's use as a multicast end-station and
does not concern multicast routing; for an IGMPv3/MLDv2 router
implementation, consider the XORP project.
The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6,
which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html
Summary
* IPv4 multicast socket processing is now moved out of ip_output.c
into a new module, in_mcast.c.
* The in_mcast.c module implements the IPv4 legacy any-source API in
terms of the protocol-independent source-specific API.
* Source filters are lazy allocated as the common case does not use them.
They are part of per inpcb state and are covered by the inpcb lock.
* struct ip_mreqn is now supported to allow applications to specify
multicast joins by interface index in the legacy IPv4 any-source API.
* In UDP, an incoming multicast datagram only requires that the source
port matches the 4-tuple if the socket was already bound by source port.
An unbound socket SHOULD be able to receive multicasts sent from an
ephemeral source port.
* The UDP socket multicast filter mode defaults to exclusive, that is,
sources present in the per-socket list will be blocked from delivery.
* The RFC 3678 userland functions have been added to libc: setsourcefilter,
getsourcefilter, setipv4sourcefilter, getipv4sourcefilter.
* Definitions for IGMPv3 are merged but not yet used.
* struct sockaddr_storage is now referenced from <netinet/in.h>. It
is therefore defined there if not already declared in the same way
as for the C99 types.
* The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF
which are then interpreted as interface indexes) is now deprecated.
* A patch for the Rhyolite.com routed in the FreeBSD base system
is available in the -net archives. This only affects individuals
running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces.
* Make IPv6 detach path similar to IPv4's in code flow; functionally same.
* Bump __FreeBSD_version to 700048; see UPDATING.
This work was financially supported by another FreeBSD committer.
Obtained from: p4://bms_netdev
Submitted by: Wilbert de Graaf (original work)
Reviewed by: rwatson (locking), silence from fenner,
net@ (but with encouragement)
2007-06-12 16:24:56 +00:00
|
|
|
ip->ip_dst, uh->uh_dport, 1, ifp);
|
1995-04-09 01:29:31 +00:00
|
|
|
if (inp == NULL) {
|
2007-02-20 10:20:03 +00:00
|
|
|
if (udp_log_in_vain) {
|
1996-05-02 05:54:14 +00:00
|
|
|
char buf[4*sizeof "123"];
|
1996-04-27 18:19:12 +00:00
|
|
|
|
|
|
|
strcpy(buf, inet_ntoa(ip->ip_dst));
|
1997-12-19 23:46:21 +00:00
|
|
|
log(LOG_INFO,
|
|
|
|
"Connection attempt to UDP %s:%d from %s:%d\n",
|
|
|
|
buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
|
|
|
|
ntohs(uh->uh_sport));
|
1996-04-27 18:19:12 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
udpstat.udps_noport++;
|
|
|
|
if (m->m_flags & (M_BCAST | M_MCAST)) {
|
|
|
|
udpstat.udps_noportbcast++;
|
2002-06-12 15:21:41 +00:00
|
|
|
goto badheadlocked;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
2007-07-10 09:30:46 +00:00
|
|
|
if (udp_blackhole)
|
2002-06-12 15:21:41 +00:00
|
|
|
goto badheadlocked;
|
2002-08-04 20:50:13 +00:00
|
|
|
if (badport_bandlim(BANDLIM_ICMP_UNREACH) < 0)
|
|
|
|
goto badheadlocked;
|
Fixed broken ICMP error generation, unified conversion of IP header
fields between host and network byte order. The details:
o icmp_error() now does not add IP header length. This fixes the problem
when icmp_error() is called from ip_forward(). In this case the ip_len
of the original IP datagram returned with ICMP error was wrong.
o icmp_error() expects all three fields, ip_len, ip_id and ip_off in host
byte order, so DTRT and convert these fields back to network byte order
before sending a message. This fixes the problem described in PR 16240
and PR 20877 (ip_id field was returned in host byte order).
o ip_ttl decrement operation in ip_forward() was moved down to make sure
that it does not corrupt the copy of original IP datagram passed later
to icmp_error().
o A copy of original IP datagram in ip_forward() was made a read-write,
independent copy. This fixes the problem I first reported to Garrett
Wollman and Bill Fenner and later put in audit trail of PR 16240:
ip_output() (not always) converts fields of original datagram to network
byte order, but because copy (mcopy) and its original (m) most likely
share the same mbuf cluster, ip_output()'s manipulations on original
also corrupted the copy.
o ip_output() now expects all three fields, ip_len, ip_off and (what is
significant) ip_id in host byte order. It was a headache for years that
ip_id was handled differently. The only compatibility issue here is the
raw IP socket interface with IP_HDRINCL socket option set and a non-zero
ip_id field, but ip.4 manual page was unclear on whether in this case
ip_id field should be in host or network byte order.
2000-09-01 12:33:03 +00:00
|
|
|
*ip = save_ip;
|
|
|
|
ip->ip_len += iphlen;
|
2000-05-24 12:57:52 +00:00
|
|
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1994-05-24 10:09:53 +00:00
|
|
|
return;
|
|
|
|
}
|
2007-02-20 10:13:11 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Check the minimum TTL for socket.
|
|
|
|
*/
|
2002-06-12 15:21:41 +00:00
|
|
|
INP_LOCK(inp);
|
2005-08-22 16:13:08 +00:00
|
|
|
if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl)
|
|
|
|
goto badheadlocked;
|
Until this change, the UDP input code used global variables udp_in,
udp_in6, and udp_ip6 to pass socket address state between udp_input(),
udp_append(), and soappendaddr_locked(). While file in the default
configuration, when running with multiple netisrs or direct ithread
dispatch, this can result in races wherein user processes using
recvmsg() get back the wrong source IP/port. To correct this and
related races:
- Eliminate udp_ip6, which is believed to be generated but then never
used. Eliminate ip_2_ip6_hdr() as it is now unneeded.
- Eliminate setting, testing, and existence of 'init' status fields
for the IPv6 structures. While with multiple UDP delivery this
could lead to amortization of IPv4 -> IPv6 conversion when
delivering an IPv4 UDP packet to an IPv6 socket, it added
substantial complexity and side effects.
- Move global structures into the stack, declaring udp_in in
udp_input(), and udp_in6 in udp_append() to be used if a conversion
is required. Pass &udp_in into udp_append().
- Re-annotate comments to reflect updates.
With this change, UDP appears to operate correctly in the presence of
substantial inbound processing parallelism. This solution avoids
introducing additional synchronization, but does increase the
potential stack depth.
Discovered by: kris (Bug Magnet)
MFC after: 3 weeks
2004-11-04 01:25:23 +00:00
|
|
|
udp_append(inp, ip, m, iphlen + sizeof(struct udphdr), &udp_in);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
2004-10-12 20:03:56 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1994-05-24 10:09:53 +00:00
|
|
|
return;
|
2002-06-12 15:21:41 +00:00
|
|
|
|
|
|
|
badheadlocked:
|
2002-06-10 20:05:46 +00:00
|
|
|
if (inp)
|
|
|
|
INP_UNLOCK(inp);
|
2004-10-12 20:03:56 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
2002-06-10 20:05:46 +00:00
|
|
|
badunlocked:
|
1994-05-24 10:09:53 +00:00
|
|
|
m_freem(m);
|
1999-12-07 17:39:16 +00:00
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* Notify a udp user of an asynchronous error; just wake up so that they can
|
|
|
|
* collect error status.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
2002-06-14 08:35:21 +00:00
|
|
|
struct inpcb *
|
2007-02-20 10:13:11 +00:00
|
|
|
udp_notify(struct inpcb *inp, int errno)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
2007-02-20 10:13:11 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
inp->inp_socket->so_error = errno;
|
|
|
|
sorwakeup(inp->inp_socket);
|
|
|
|
sowwakeup(inp->inp_socket);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (inp);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2007-02-20 10:13:11 +00:00
|
|
|
udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
2001-02-26 21:19:47 +00:00
|
|
|
struct ip *ip = vip;
|
|
|
|
struct udphdr *uh;
|
2002-06-14 08:35:21 +00:00
|
|
|
struct inpcb *(*notify)(struct inpcb *, int) = udp_notify;
|
2004-08-16 18:32:07 +00:00
|
|
|
struct in_addr faddr;
|
2001-02-26 21:19:47 +00:00
|
|
|
struct inpcb *inp;
|
|
|
|
|
|
|
|
faddr = ((struct sockaddr_in *)sa)->sin_addr;
|
|
|
|
if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
|
2004-08-16 18:32:07 +00:00
|
|
|
return;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2003-11-20 20:07:39 +00:00
|
|
|
/*
|
|
|
|
* Redirects don't need to be handled up here.
|
|
|
|
*/
|
|
|
|
if (PRC_IS_REDIRECT(cmd))
|
|
|
|
return;
|
2007-02-20 10:13:11 +00:00
|
|
|
|
2003-11-20 20:07:39 +00:00
|
|
|
/*
|
|
|
|
* Hostdead is ugly because it goes linearly through all PCBs.
|
2007-02-20 10:13:11 +00:00
|
|
|
*
|
|
|
|
* XXX: We never get this from ICMP, otherwise it makes an excellent
|
|
|
|
* DoS attack on machines with many connections.
|
2003-11-20 20:07:39 +00:00
|
|
|
*/
|
|
|
|
if (cmd == PRC_HOSTDEAD)
|
2007-05-07 13:47:39 +00:00
|
|
|
ip = NULL;
|
2001-02-22 21:23:45 +00:00
|
|
|
else if ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)
|
1994-05-24 10:09:53 +00:00
|
|
|
return;
|
2007-05-07 13:47:39 +00:00
|
|
|
if (ip != NULL) {
|
1994-05-24 10:09:53 +00:00
|
|
|
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RLOCK(&udbinfo);
|
2001-02-26 21:19:47 +00:00
|
|
|
inp = in_pcblookup_hash(&udbinfo, faddr, uh->uh_dport,
|
2004-08-16 18:32:07 +00:00
|
|
|
ip->ip_src, uh->uh_sport, 0, NULL);
|
2002-06-10 20:05:46 +00:00
|
|
|
if (inp != NULL) {
|
|
|
|
INP_LOCK(inp);
|
2003-02-15 02:37:57 +00:00
|
|
|
if (inp->inp_socket != NULL) {
|
2002-06-10 20:05:46 +00:00
|
|
|
(*notify)(inp, inetctlerrmap[cmd]);
|
|
|
|
}
|
|
|
|
INP_UNLOCK(inp);
|
|
|
|
}
|
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1994-05-24 10:09:53 +00:00
|
|
|
} else
|
2002-06-10 20:05:46 +00:00
|
|
|
in_pcbnotifyall(&udbinfo, faddr, inetctlerrmap[cmd], notify);
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
1998-05-15 20:11:40 +00:00
|
|
|
static int
|
2000-07-04 11:25:35 +00:00
|
|
|
udp_pcblist(SYSCTL_HANDLER_ARGS)
|
1998-05-15 20:11:40 +00:00
|
|
|
{
|
2005-06-01 11:24:00 +00:00
|
|
|
int error, i, n;
|
1998-05-15 20:11:40 +00:00
|
|
|
struct inpcb *inp, **inp_list;
|
|
|
|
inp_gen_t gencnt;
|
|
|
|
struct xinpgen xig;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The process of preparing the TCB list is too time-consuming and
|
|
|
|
* resource-intensive to repeat twice on every request.
|
|
|
|
*/
|
|
|
|
if (req->oldptr == 0) {
|
|
|
|
n = udbinfo.ipi_count;
|
|
|
|
req->oldidx = 2 * (sizeof xig)
|
|
|
|
+ (n + n/8) * sizeof(struct xinpcb);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (0);
|
1998-05-15 20:11:40 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (req->newptr != 0)
|
2007-02-20 10:13:11 +00:00
|
|
|
return (EPERM);
|
1998-05-15 20:11:40 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* OK, now we're committed to doing something.
|
|
|
|
*/
|
2003-02-15 02:37:57 +00:00
|
|
|
INP_INFO_RLOCK(&udbinfo);
|
1998-05-15 20:11:40 +00:00
|
|
|
gencnt = udbinfo.ipi_gencnt;
|
|
|
|
n = udbinfo.ipi_count;
|
2003-02-15 02:37:57 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1998-05-15 20:11:40 +00:00
|
|
|
|
2004-02-26 00:27:04 +00:00
|
|
|
error = sysctl_wire_old_buffer(req, 2 * (sizeof xig)
|
2002-07-28 19:59:31 +00:00
|
|
|
+ n * sizeof(struct xinpcb));
|
2004-02-26 00:27:04 +00:00
|
|
|
if (error != 0)
|
|
|
|
return (error);
|
2002-07-28 19:59:31 +00:00
|
|
|
|
1998-05-15 20:11:40 +00:00
|
|
|
xig.xig_len = sizeof xig;
|
|
|
|
xig.xig_count = n;
|
|
|
|
xig.xig_gen = gencnt;
|
|
|
|
xig.xig_sogen = so_gencnt;
|
|
|
|
error = SYSCTL_OUT(req, &xig, sizeof xig);
|
|
|
|
if (error)
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
1998-05-15 20:11:40 +00:00
|
|
|
|
2003-02-19 05:47:46 +00:00
|
|
|
inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
|
1998-05-15 20:11:40 +00:00
|
|
|
if (inp_list == 0)
|
2007-02-20 10:13:11 +00:00
|
|
|
return (ENOMEM);
|
2004-08-16 18:32:07 +00:00
|
|
|
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RLOCK(&udbinfo);
|
2007-04-30 23:12:05 +00:00
|
|
|
for (inp = LIST_FIRST(udbinfo.ipi_listhead), i = 0; inp && i < n;
|
2001-02-04 13:13:25 +00:00
|
|
|
inp = LIST_NEXT(inp, inp_list)) {
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
2002-06-21 22:54:16 +00:00
|
|
|
if (inp->inp_gencnt <= gencnt &&
|
|
|
|
cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0)
|
1998-05-15 20:11:40 +00:00
|
|
|
inp_list[i++] = inp;
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
1998-05-15 20:11:40 +00:00
|
|
|
}
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1998-05-15 20:11:40 +00:00
|
|
|
n = i;
|
|
|
|
|
|
|
|
error = 0;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
|
|
inp = inp_list[i];
|
2006-07-18 22:34:27 +00:00
|
|
|
INP_LOCK(inp);
|
1998-05-15 20:11:40 +00:00
|
|
|
if (inp->inp_gencnt <= gencnt) {
|
|
|
|
struct xinpcb xi;
|
2005-05-06 02:50:00 +00:00
|
|
|
bzero(&xi, sizeof(xi));
|
1998-05-15 20:11:40 +00:00
|
|
|
xi.xi_len = sizeof xi;
|
|
|
|
/* XXX should avoid extra copy */
|
|
|
|
bcopy(inp, &xi.xi_inp, sizeof *inp);
|
|
|
|
if (inp->inp_socket)
|
|
|
|
sotoxsocket(inp->inp_socket, &xi.xi_socket);
|
2003-02-15 02:37:57 +00:00
|
|
|
xi.xi_inp.inp_gencnt = inp->inp_gencnt;
|
2006-07-18 22:34:27 +00:00
|
|
|
INP_UNLOCK(inp);
|
1998-05-15 20:11:40 +00:00
|
|
|
error = SYSCTL_OUT(req, &xi, sizeof xi);
|
2006-07-18 22:34:27 +00:00
|
|
|
} else
|
2007-02-20 10:13:11 +00:00
|
|
|
INP_UNLOCK(inp);
|
1998-05-15 20:11:40 +00:00
|
|
|
}
|
|
|
|
if (!error) {
|
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* Give the user an updated idea of our state. If the
|
|
|
|
* generation differs from what we told her before, she knows
|
|
|
|
* that something happened while we were processing this
|
|
|
|
* request, and it might be necessary to retry.
|
1998-05-15 20:11:40 +00:00
|
|
|
*/
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RLOCK(&udbinfo);
|
1998-05-15 20:11:40 +00:00
|
|
|
xig.xig_gen = udbinfo.ipi_gencnt;
|
|
|
|
xig.xig_sogen = so_gencnt;
|
|
|
|
xig.xig_count = udbinfo.ipi_count;
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
1998-05-15 20:11:40 +00:00
|
|
|
error = SYSCTL_OUT(req, &xig, sizeof xig);
|
|
|
|
}
|
|
|
|
free(inp_list, M_TEMP);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
1998-05-15 20:11:40 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
|
2007-02-20 10:13:11 +00:00
|
|
|
udp_pcblist, "S,xinpcb", "List of active UDP sockets");
|
1998-05-15 20:11:40 +00:00
|
|
|
|
1999-07-11 18:32:46 +00:00
|
|
|
static int
|
2000-07-04 11:25:35 +00:00
|
|
|
udp_getcred(SYSCTL_HANDLER_ARGS)
|
1999-07-11 18:32:46 +00:00
|
|
|
{
|
2001-02-18 13:30:20 +00:00
|
|
|
struct xucred xuc;
|
1999-07-11 18:32:46 +00:00
|
|
|
struct sockaddr_in addrs[2];
|
|
|
|
struct inpcb *inp;
|
2005-06-01 11:24:00 +00:00
|
|
|
int error;
|
1999-07-11 18:32:46 +00:00
|
|
|
|
2007-06-12 00:12:01 +00:00
|
|
|
error = priv_check(req->td, PRIV_NETINET_GETCRED);
|
1999-07-11 18:32:46 +00:00
|
|
|
if (error)
|
|
|
|
return (error);
|
|
|
|
error = SYSCTL_IN(req, addrs, sizeof(addrs));
|
|
|
|
if (error)
|
|
|
|
return (error);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RLOCK(&udbinfo);
|
1999-07-11 18:32:46 +00:00
|
|
|
inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
|
1999-12-07 17:39:16 +00:00
|
|
|
addrs[0].sin_addr, addrs[0].sin_port, 1, NULL);
|
2002-07-12 09:55:48 +00:00
|
|
|
if (inp == NULL || inp->inp_socket == NULL) {
|
1999-07-11 18:32:46 +00:00
|
|
|
error = ENOENT;
|
|
|
|
goto out;
|
|
|
|
}
|
2002-03-22 19:57:41 +00:00
|
|
|
error = cr_canseesocket(req->td->td_ucred, inp->inp_socket);
|
2001-06-24 12:18:27 +00:00
|
|
|
if (error)
|
|
|
|
goto out;
|
2002-02-27 04:45:37 +00:00
|
|
|
cru2x(inp->inp_socket->so_cred, &xuc);
|
1999-07-11 18:32:46 +00:00
|
|
|
out:
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_RUNLOCK(&udbinfo);
|
2002-07-11 23:18:43 +00:00
|
|
|
if (error == 0)
|
|
|
|
error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
|
1999-07-11 18:32:46 +00:00
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
2001-06-24 12:18:27 +00:00
|
|
|
SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
|
|
|
|
CTLTYPE_OPAQUE|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0,
|
|
|
|
udp_getcred, "S,xucred", "Get the xucred of a UDP connection");
|
1999-07-11 18:32:46 +00:00
|
|
|
|
1995-11-14 20:34:56 +00:00
|
|
|
static int
|
2007-02-20 10:13:11 +00:00
|
|
|
udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
|
|
|
|
struct mbuf *control, struct thread *td)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
2007-02-20 10:13:11 +00:00
|
|
|
struct udpiphdr *ui;
|
|
|
|
int len = m->m_pkthdr.len;
|
2002-10-21 20:10:05 +00:00
|
|
|
struct in_addr faddr, laddr;
|
2002-10-21 20:40:02 +00:00
|
|
|
struct cmsghdr *cm;
|
|
|
|
struct sockaddr_in *sin, src;
|
2002-10-21 20:10:05 +00:00
|
|
|
int error = 0;
|
2003-08-20 14:46:40 +00:00
|
|
|
int ipflags;
|
2002-10-21 20:10:05 +00:00
|
|
|
u_short fport, lport;
|
2004-08-19 01:13:10 +00:00
|
|
|
int unlock_udbinfo;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2004-08-19 01:13:10 +00:00
|
|
|
/*
|
|
|
|
* udp_output() may need to temporarily bind or connect the current
|
|
|
|
* inpcb. As such, we don't know up front what inpcb locks we will
|
|
|
|
* need. Do any work to decide what is needed up front before
|
|
|
|
* acquiring locks.
|
|
|
|
*/
|
1996-10-25 17:57:53 +00:00
|
|
|
if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
|
2002-10-21 20:40:02 +00:00
|
|
|
if (control)
|
|
|
|
m_freem(control);
|
2004-08-19 01:13:10 +00:00
|
|
|
m_freem(m);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (EMSGSIZE);
|
1996-10-25 17:57:53 +00:00
|
|
|
}
|
|
|
|
|
2007-03-08 15:26:54 +00:00
|
|
|
src.sin_family = 0;
|
2002-10-21 20:40:02 +00:00
|
|
|
if (control != NULL) {
|
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* XXX: Currently, we assume all the optional information is
|
|
|
|
* stored in a single mbuf.
|
2002-10-21 20:40:02 +00:00
|
|
|
*/
|
|
|
|
if (control->m_next) {
|
|
|
|
m_freem(control);
|
2004-08-19 01:13:10 +00:00
|
|
|
m_freem(m);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (EINVAL);
|
2002-10-21 20:40:02 +00:00
|
|
|
}
|
|
|
|
for (; control->m_len > 0;
|
|
|
|
control->m_data += CMSG_ALIGN(cm->cmsg_len),
|
|
|
|
control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
|
|
|
|
cm = mtod(control, struct cmsghdr *);
|
2007-05-07 13:47:39 +00:00
|
|
|
if (control->m_len < sizeof(*cm) || cm->cmsg_len == 0
|
|
|
|
|| cm->cmsg_len > control->m_len) {
|
2002-10-21 20:40:02 +00:00
|
|
|
error = EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (cm->cmsg_level != IPPROTO_IP)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
switch (cm->cmsg_type) {
|
|
|
|
case IP_SENDSRCADDR:
|
|
|
|
if (cm->cmsg_len !=
|
|
|
|
CMSG_LEN(sizeof(struct in_addr))) {
|
|
|
|
error = EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
bzero(&src, sizeof(src));
|
|
|
|
src.sin_family = AF_INET;
|
|
|
|
src.sin_len = sizeof(src);
|
|
|
|
src.sin_port = inp->inp_lport;
|
2007-05-07 13:47:39 +00:00
|
|
|
src.sin_addr =
|
|
|
|
*(struct in_addr *)CMSG_DATA(cm);
|
2002-10-21 20:40:02 +00:00
|
|
|
break;
|
2007-05-07 13:47:39 +00:00
|
|
|
|
2002-10-21 20:40:02 +00:00
|
|
|
default:
|
|
|
|
error = ENOPROTOOPT;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (error)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
m_freem(control);
|
|
|
|
}
|
2004-08-19 01:13:10 +00:00
|
|
|
if (error) {
|
|
|
|
m_freem(m);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
2004-08-19 01:13:10 +00:00
|
|
|
}
|
|
|
|
|
2007-03-08 15:26:54 +00:00
|
|
|
if (src.sin_family == AF_INET || addr != NULL) {
|
2004-08-19 01:13:10 +00:00
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
|
|
unlock_udbinfo = 1;
|
|
|
|
} else
|
|
|
|
unlock_udbinfo = 0;
|
|
|
|
INP_LOCK(inp);
|
|
|
|
|
|
|
|
#ifdef MAC
|
|
|
|
mac_create_mbuf_from_inpcb(inp, m);
|
|
|
|
#endif
|
|
|
|
|
2007-03-08 15:26:54 +00:00
|
|
|
/*
|
|
|
|
* If the IP_SENDSRCADDR control message was specified, override the
|
|
|
|
* source address for this datagram. Its use is invalidated if the
|
|
|
|
* address thus specified is incomplete or clobbers other inpcbs.
|
|
|
|
*/
|
2002-10-21 20:10:05 +00:00
|
|
|
laddr = inp->inp_laddr;
|
|
|
|
lport = inp->inp_lport;
|
2007-03-08 15:26:54 +00:00
|
|
|
if (src.sin_family == AF_INET) {
|
|
|
|
if ((lport == 0) ||
|
|
|
|
(laddr.s_addr == INADDR_ANY &&
|
|
|
|
src.sin_addr.s_addr == INADDR_ANY)) {
|
2002-10-21 20:40:02 +00:00
|
|
|
error = EINVAL;
|
|
|
|
goto release;
|
|
|
|
}
|
|
|
|
error = in_pcbbind_setup(inp, (struct sockaddr *)&src,
|
2004-03-27 21:05:46 +00:00
|
|
|
&laddr.s_addr, &lport, td->td_ucred);
|
2002-10-21 20:40:02 +00:00
|
|
|
if (error)
|
|
|
|
goto release;
|
|
|
|
}
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
if (addr) {
|
This Implements the mumbled about "Jail" feature.
This is a seriously beefed up chroot kind of thing. The process
is jailed along the same lines as a chroot does it, but with
additional tough restrictions imposed on what the superuser can do.
For all I know, it is safe to hand over the root bit inside a
prison to the customer living in that prison, this is what
it was developed for in fact: "real virtual servers".
Each prison has an ip number associated with it, which all IP
communications will be coerced to use and each prison has its own
hostname.
Needless to say, you need more RAM this way, but the advantage is
that each customer can run their own particular version of apache
and not stomp on the toes of their neighbors.
It generally does what one would expect, but setting up a jail
still takes a little knowledge.
A few notes:
I have no scripts for setting up a jail, don't ask me for them.
The IP number should be an alias on one of the interfaces.
mount a /proc in each jail, it will make ps more useable.
/proc/<pid>/status tells the hostname of the prison for
jailed processes.
Quotas are only sensible if you have a mountpoint per prison.
There are no privisions for stopping resource-hogging.
Some "#ifdef INET" and similar may be missing (send patches!)
If somebody wants to take it from here and develop it into
more of a "virtual machine" they should be most welcome!
Tools, comments, patches & documentation most welcome.
Have fun...
Sponsored by: http://www.rndassociates.com/
Run for almost a year by: http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00
|
|
|
sin = (struct sockaddr_in *)addr;
|
2005-03-29 01:10:46 +00:00
|
|
|
if (jailed(td->td_ucred))
|
2007-02-20 10:13:11 +00:00
|
|
|
prison_remote_ip(td->td_ucred, 0,
|
|
|
|
&sin->sin_addr.s_addr);
|
1994-05-24 10:09:53 +00:00
|
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
|
|
error = EISCONN;
|
|
|
|
goto release;
|
|
|
|
}
|
2002-10-21 20:10:05 +00:00
|
|
|
error = in_pcbconnect_setup(inp, addr, &laddr.s_addr, &lport,
|
2004-03-27 21:05:46 +00:00
|
|
|
&faddr.s_addr, &fport, NULL, td->td_ucred);
|
2002-10-21 20:10:05 +00:00
|
|
|
if (error)
|
1994-05-24 10:09:53 +00:00
|
|
|
goto release;
|
2002-10-21 20:10:05 +00:00
|
|
|
|
|
|
|
/* Commit the local port if newly assigned. */
|
|
|
|
if (inp->inp_laddr.s_addr == INADDR_ANY &&
|
|
|
|
inp->inp_lport == 0) {
|
2005-02-22 07:50:02 +00:00
|
|
|
/*
|
|
|
|
* Remember addr if jailed, to prevent rebinding.
|
|
|
|
*/
|
|
|
|
if (jailed(td->td_ucred))
|
|
|
|
inp->inp_laddr = laddr;
|
2002-10-21 20:10:05 +00:00
|
|
|
inp->inp_lport = lport;
|
|
|
|
if (in_pcbinshash(inp) != 0) {
|
|
|
|
inp->inp_lport = 0;
|
|
|
|
error = EAGAIN;
|
|
|
|
goto release;
|
|
|
|
}
|
|
|
|
inp->inp_flags |= INP_ANONPORT;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
} else {
|
2002-10-21 20:10:05 +00:00
|
|
|
faddr = inp->inp_faddr;
|
|
|
|
fport = inp->inp_fport;
|
|
|
|
if (faddr.s_addr == INADDR_ANY) {
|
1994-05-24 10:09:53 +00:00
|
|
|
error = ENOTCONN;
|
|
|
|
goto release;
|
|
|
|
}
|
|
|
|
}
|
2004-08-21 16:14:04 +00:00
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
2004-08-21 16:14:04 +00:00
|
|
|
* Calculate data length and get a mbuf for UDP, IP, and possible
|
2004-08-22 01:32:48 +00:00
|
|
|
* link-layer headers. Immediate slide the data pointer back forward
|
|
|
|
* since we won't use that space at this layer.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
2004-08-21 16:14:04 +00:00
|
|
|
M_PREPEND(m, sizeof(struct udpiphdr) + max_linkhdr, M_DONTWAIT);
|
|
|
|
if (m == NULL) {
|
1994-05-24 10:09:53 +00:00
|
|
|
error = ENOBUFS;
|
2004-06-16 08:50:14 +00:00
|
|
|
goto release;
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
2004-08-21 16:14:04 +00:00
|
|
|
m->m_data += max_linkhdr;
|
|
|
|
m->m_len -= max_linkhdr;
|
2004-08-22 01:32:48 +00:00
|
|
|
m->m_pkthdr.len -= max_linkhdr;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
|
|
|
/*
|
2007-02-20 10:13:11 +00:00
|
|
|
* Fill in mbuf with extended UDP header and addresses and length put
|
|
|
|
* into network format.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
ui = mtod(m, struct udpiphdr *);
|
2000-03-27 19:14:27 +00:00
|
|
|
bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
|
1994-05-24 10:09:53 +00:00
|
|
|
ui->ui_pr = IPPROTO_UDP;
|
2002-10-21 20:10:05 +00:00
|
|
|
ui->ui_src = laddr;
|
|
|
|
ui->ui_dst = faddr;
|
|
|
|
ui->ui_sport = lport;
|
|
|
|
ui->ui_dport = fport;
|
2000-03-27 19:14:27 +00:00
|
|
|
ui->ui_ulen = htons((u_short)len + sizeof(struct udphdr));
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2005-09-26 20:25:16 +00:00
|
|
|
/*
|
|
|
|
* Set the Don't Fragment bit in the IP header.
|
|
|
|
*/
|
|
|
|
if (inp->inp_flags & INP_DONTFRAG) {
|
|
|
|
struct ip *ip;
|
2007-02-20 10:13:11 +00:00
|
|
|
|
2005-09-26 20:25:16 +00:00
|
|
|
ip = (struct ip *)&ui->ui_i;
|
|
|
|
ip->ip_off |= IP_DF;
|
|
|
|
}
|
|
|
|
|
2004-09-05 02:34:12 +00:00
|
|
|
ipflags = 0;
|
|
|
|
if (inp->inp_socket->so_options & SO_DONTROUTE)
|
|
|
|
ipflags |= IP_ROUTETOIF;
|
|
|
|
if (inp->inp_socket->so_options & SO_BROADCAST)
|
|
|
|
ipflags |= IP_ALLOWBROADCAST;
|
2006-09-06 19:04:36 +00:00
|
|
|
if (inp->inp_flags & INP_ONESBCAST)
|
2003-08-20 14:46:40 +00:00
|
|
|
ipflags |= IP_SENDONES;
|
|
|
|
|
1994-05-24 10:09:53 +00:00
|
|
|
/*
|
2000-03-27 19:14:27 +00:00
|
|
|
* Set up checksum and output datagram.
|
1994-05-24 10:09:53 +00:00
|
|
|
*/
|
|
|
|
if (udpcksum) {
|
2006-09-06 19:04:36 +00:00
|
|
|
if (inp->inp_flags & INP_ONESBCAST)
|
2003-09-03 02:19:29 +00:00
|
|
|
faddr.s_addr = INADDR_BROADCAST;
|
|
|
|
ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
|
2000-03-27 19:14:27 +00:00
|
|
|
htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
|
|
|
|
m->m_pkthdr.csum_flags = CSUM_UDP;
|
|
|
|
m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
|
2007-02-20 10:13:11 +00:00
|
|
|
} else
|
2000-03-27 19:14:27 +00:00
|
|
|
ui->ui_sum = 0;
|
1994-05-24 10:09:53 +00:00
|
|
|
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
|
1997-04-03 05:14:45 +00:00
|
|
|
((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
|
|
|
|
((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
|
1994-05-24 10:09:53 +00:00
|
|
|
udpstat.udps_opackets++;
|
1999-12-07 17:39:16 +00:00
|
|
|
|
2004-08-19 01:13:10 +00:00
|
|
|
if (unlock_udbinfo)
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
2003-11-20 20:07:39 +00:00
|
|
|
error = ip_output(m, inp->inp_options, NULL, ipflags,
|
2002-10-16 01:54:46 +00:00
|
|
|
inp->inp_moptions, inp);
|
2004-08-19 01:13:10 +00:00
|
|
|
INP_UNLOCK(inp);
|
1994-05-24 10:09:53 +00:00
|
|
|
return (error);
|
|
|
|
|
|
|
|
release:
|
2004-08-19 01:13:10 +00:00
|
|
|
INP_UNLOCK(inp);
|
|
|
|
if (unlock_udbinfo)
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
1994-05-24 10:09:53 +00:00
|
|
|
m_freem(m);
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
2006-04-01 15:15:05 +00:00
|
|
|
static void
|
1997-02-14 18:15:53 +00:00
|
|
|
udp_abort(struct socket *so)
|
1994-05-24 10:09:53 +00:00
|
|
|
{
|
1997-02-14 18:15:53 +00:00
|
|
|
struct inpcb *inp;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_abort: inp == NULL"));
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
2006-07-21 17:11:15 +00:00
|
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
|
|
in_pcbdisconnect(inp);
|
|
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
|
|
|
soisdisconnected(so);
|
|
|
|
}
|
|
|
|
INP_UNLOCK(inp);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
static int
|
2001-09-12 08:38:13 +00:00
|
|
|
udp_attach(struct socket *so, int proto, struct thread *td)
|
1997-02-14 18:15:53 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
2005-06-01 11:24:00 +00:00
|
|
|
int error;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
|
1999-12-07 17:39:16 +00:00
|
|
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
2006-06-03 19:29:26 +00:00
|
|
|
if (error)
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
2006-06-03 19:29:26 +00:00
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
2006-07-18 22:34:27 +00:00
|
|
|
error = in_pcballoc(so, &udbinfo);
|
2003-08-19 17:11:46 +00:00
|
|
|
if (error) {
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
2003-08-19 17:11:46 +00:00
|
|
|
}
|
1999-12-07 17:39:16 +00:00
|
|
|
|
|
|
|
inp = (struct inpcb *)so->so_pcb;
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
1999-12-07 17:39:16 +00:00
|
|
|
inp->inp_vflag |= INP_IPV4;
|
|
|
|
inp->inp_ip_ttl = ip_defttl;
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (0);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
static int
|
2001-09-12 08:38:13 +00:00
|
|
|
udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
|
1997-02-14 18:15:53 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
2005-06-01 11:24:00 +00:00
|
|
|
int error;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_bind: inp == NULL"));
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
2004-03-27 21:05:46 +00:00
|
|
|
error = in_pcbbind(inp, nam, td->td_ucred);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
2006-07-21 17:11:15 +00:00
|
|
|
static void
|
|
|
|
udp_close(struct socket *so)
|
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
|
|
|
KASSERT(inp != NULL, ("udp_close: inp == NULL"));
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
|
|
|
INP_LOCK(inp);
|
|
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
|
|
in_pcbdisconnect(inp);
|
|
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
|
|
|
soisdisconnected(so);
|
|
|
|
}
|
|
|
|
INP_UNLOCK(inp);
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
|
|
}
|
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
static int
|
2001-09-12 08:38:13 +00:00
|
|
|
udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
|
1997-02-14 18:15:53 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
2005-06-01 11:24:00 +00:00
|
|
|
int error;
|
This Implements the mumbled about "Jail" feature.
This is a seriously beefed up chroot kind of thing. The process
is jailed along the same lines as a chroot does it, but with
additional tough restrictions imposed on what the superuser can do.
For all I know, it is safe to hand over the root bit inside a
prison to the customer living in that prison, this is what
it was developed for in fact: "real virtual servers".
Each prison has an ip number associated with it, which all IP
communications will be coerced to use and each prison has its own
hostname.
Needless to say, you need more RAM this way, but the advantage is
that each customer can run their own particular version of apache
and not stomp on the toes of their neighbors.
It generally does what one would expect, but setting up a jail
still takes a little knowledge.
A few notes:
I have no scripts for setting up a jail, don't ask me for them.
The IP number should be an alias on one of the interfaces.
mount a /proc in each jail, it will make ps more useable.
/proc/<pid>/status tells the hostname of the prison for
jailed processes.
Quotas are only sensible if you have a mountpoint per prison.
There are no privisions for stopping resource-hogging.
Some "#ifdef INET" and similar may be missing (send patches!)
If somebody wants to take it from here and develop it into
more of a "virtual machine" they should be most welcome!
Tools, comments, patches & documentation most welcome.
Have fun...
Sponsored by: http://www.rndassociates.com/
Run for almost a year by: http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00
|
|
|
struct sockaddr_in *sin;
|
1997-02-14 18:15:53 +00:00
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_connect: inp == NULL"));
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
|
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
|
|
INP_UNLOCK(inp);
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (EISCONN);
|
2002-06-10 20:05:46 +00:00
|
|
|
}
|
2000-09-17 13:34:18 +00:00
|
|
|
sin = (struct sockaddr_in *)nam;
|
2005-03-29 01:10:46 +00:00
|
|
|
if (jailed(td->td_ucred))
|
2002-02-27 18:32:23 +00:00
|
|
|
prison_remote_ip(td->td_ucred, 0, &sin->sin_addr.s_addr);
|
2004-03-27 21:05:46 +00:00
|
|
|
error = in_pcbconnect(inp, nam, td->td_ucred);
|
2002-05-31 11:52:35 +00:00
|
|
|
if (error == 0)
|
1997-02-14 18:15:53 +00:00
|
|
|
soisconnected(so);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (error);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
Chance protocol switch method pru_detach() so that it returns void
rather than an error. Detaches do not "fail", they other occur or
the protocol flags SS_PROTOREF to take ownership of the socket.
soclose() no longer looks at so_pcb to see if it's NULL, relying
entirely on the protocol to decide whether it's time to free the
socket or not using SS_PROTOREF. so_pcb is now entirely owned and
managed by the protocol code. Likewise, no longer test so_pcb in
other socket functions, such as soreceive(), which have no business
digging into protocol internals.
Protocol detach routines no longer try to free the socket on detach,
this is performed in the socket code if the protocol permits it.
In rts_detach(), no longer test for rp != NULL in detach, and
likewise in other protocols that don't permit a NULL so_pcb, reduce
the incidence of testing for it during detach.
netinet and netinet6 are not fully updated to this change, which
will be in an upcoming commit. In their current state they may leak
memory or panic.
MFC after: 3 months
2006-04-01 15:42:02 +00:00
|
|
|
static void
|
1997-02-14 18:15:53 +00:00
|
|
|
udp_detach(struct socket *so)
|
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_detach: inp == NULL"));
|
2006-07-21 17:11:15 +00:00
|
|
|
KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
|
|
|
|
("udp_detach: not disconnected"));
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
1997-02-14 18:15:53 +00:00
|
|
|
in_pcbdetach(inp);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
in_pcbfree(inp);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
static int
|
|
|
|
udp_disconnect(struct socket *so)
|
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_disconnect: inp == NULL"));
|
|
|
|
INP_INFO_WLOCK(&udbinfo);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
|
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
|
|
|
INP_UNLOCK(inp);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (ENOTCONN);
|
2002-06-10 20:05:46 +00:00
|
|
|
}
|
1994-05-24 10:09:53 +00:00
|
|
|
|
1997-02-14 18:15:53 +00:00
|
|
|
in_pcbdisconnect(inp);
|
|
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
2006-05-21 19:28:46 +00:00
|
|
|
SOCK_LOCK(so);
|
|
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
|
|
|
SOCK_UNLOCK(so);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
|
|
|
INP_INFO_WUNLOCK(&udbinfo);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (0);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
1997-08-16 19:16:27 +00:00
|
|
|
udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
|
2007-02-20 10:13:11 +00:00
|
|
|
struct mbuf *control, struct thread *td)
|
1997-02-14 18:15:53 +00:00
|
|
|
{
|
|
|
|
struct inpcb *inp;
|
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_send: inp == NULL"));
|
2007-02-20 10:13:11 +00:00
|
|
|
return (udp_output(inp, m, addr, control, td));
|
1994-05-24 10:09:53 +00:00
|
|
|
}
|
|
|
|
|
1999-11-05 14:41:39 +00:00
|
|
|
int
|
1997-02-14 18:15:53 +00:00
|
|
|
udp_shutdown(struct socket *so)
|
|
|
|
{
|
1994-05-24 10:09:53 +00:00
|
|
|
struct inpcb *inp;
|
1997-02-14 18:15:53 +00:00
|
|
|
|
|
|
|
inp = sotoinpcb(so);
|
Update in_pcb-derived basic socket types following changes to
pru_abort(), pru_detach(), and in_pcbdetach():
- Universally support and enforce the invariant that so_pcb is
never NULL, converting dozens of unnecessary NULL checks into
assertions, and eliminating dozens of unnecessary error handling
cases in protocol code.
- In some cases, eliminate unnecessary pcbinfo locking, as it is no
longer required to ensure so_pcb != NULL. For example, in protocol
shutdown methods, and in raw IP send.
- Abort and detach protocol switch methods no longer return failures,
nor attempt to free sockets, as the socket layer does this.
- Invoke in_pcbfree() after in_pcbdetach() in order to free the
detached in_pcb structure for a socket.
MFC after: 3 months
2006-04-01 16:20:54 +00:00
|
|
|
KASSERT(inp != NULL, ("udp_shutdown: inp == NULL"));
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_LOCK(inp);
|
1997-02-14 18:15:53 +00:00
|
|
|
socantsendmore(so);
|
2002-06-10 20:05:46 +00:00
|
|
|
INP_UNLOCK(inp);
|
2007-02-20 10:13:11 +00:00
|
|
|
return (0);
|
1997-02-14 18:15:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
struct pr_usrreqs udp_usrreqs = {
|
2004-11-08 14:44:54 +00:00
|
|
|
.pru_abort = udp_abort,
|
|
|
|
.pru_attach = udp_attach,
|
|
|
|
.pru_bind = udp_bind,
|
|
|
|
.pru_connect = udp_connect,
|
|
|
|
.pru_control = in_control,
|
|
|
|
.pru_detach = udp_detach,
|
|
|
|
.pru_disconnect = udp_disconnect,
|
2007-05-11 10:20:51 +00:00
|
|
|
.pru_peeraddr = in_getpeeraddr,
|
2004-11-08 14:44:54 +00:00
|
|
|
.pru_send = udp_send,
|
2006-05-06 11:24:59 +00:00
|
|
|
.pru_sosend = sosend_dgram,
|
2004-11-08 14:44:54 +00:00
|
|
|
.pru_shutdown = udp_shutdown,
|
2007-05-11 10:20:51 +00:00
|
|
|
.pru_sockaddr = in_getsockaddr,
|
2006-07-21 17:11:15 +00:00
|
|
|
.pru_sosetlabel = in_pcbsosetlabel,
|
|
|
|
.pru_close = udp_close,
|
1997-02-14 18:15:53 +00:00
|
|
|
};
|