ipv4.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:24k
- /*****************************************************************************
- * ipv4.c: IPv4 network abstraction layer
- *****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: ipv4.c 8907 2004-10-04 14:29:23Z gbazin $
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- * Mathias Kretschmer <mathias@research.att.com>
- * Alexis de Lattre <alexis@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h>
- #include <string.h>
- #include <vlc/vlc.h>
- #include <errno.h>
- #ifdef HAVE_SYS_TYPES_H
- # include <sys/types.h>
- #endif
- #ifdef HAVE_SYS_STAT_H
- # include <sys/stat.h>
- #endif
- #ifdef HAVE_FCNTL_H
- # include <fcntl.h>
- #endif
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #if defined( UNDER_CE )
- # include <winsock.h>
- # define close(fd) CloseHandle((HANDLE)fd)
- #elif defined( WIN32 )
- # include <winsock2.h>
- # include <ws2tcpip.h>
- # define close closesocket
- #else
- # include <netdb.h> /* hostent ... */
- # include <sys/socket.h>
- # include <netinet/in.h>
- # ifdef HAVE_ARPA_INET_H
- # include <arpa/inet.h> /* inet_ntoa(), inet_aton() */
- # endif
- #endif
- #include "network.h"
- #ifndef INADDR_ANY
- # define INADDR_ANY 0x00000000
- #endif
- #ifndef INADDR_NONE
- # define INADDR_NONE 0xFFFFFFFF
- #endif
- #ifndef IN_MULTICAST
- # define IN_MULTICAST(a) IN_CLASSD(a)
- #endif
- #ifndef PF_INET
- # define PF_INET AF_INET /* BeOS */
- #endif
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int NetOpen( vlc_object_t * );
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define TIMEOUT_TEXT N_("TCP connection timeout in ms")
- #define TIMEOUT_LONGTEXT N_(
- "Allows you to modify the default TCP connection timeout. This "
- "value should be set in millisecond units." )
- vlc_module_begin();
- set_description( _("IPv4 network abstraction layer") );
- set_capability( "network", 50 );
- set_callbacks( NetOpen, NULL );
- add_integer( "ipv4-timeout", 5 * 1000, NULL, TIMEOUT_TEXT,
- TIMEOUT_LONGTEXT, VLC_TRUE );
- vlc_module_end();
- /*****************************************************************************
- * BuildAddr: utility function to build a struct sockaddr_in
- *****************************************************************************/
- static int BuildAddr( struct sockaddr_in * p_socket,
- const char * psz_address, int i_port )
- {
- /* Reset struct */
- memset( p_socket, 0, sizeof( struct sockaddr_in ) );
- p_socket->sin_family = AF_INET; /* family */
- p_socket->sin_port = htons( (uint16_t)i_port );
- if( !*psz_address )
- {
- p_socket->sin_addr.s_addr = INADDR_ANY;
- }
- else
- {
- struct hostent * p_hostent;
- /* Try to convert address directly from in_addr - this will work if
- * psz_address is dotted decimal. */
- #ifdef HAVE_ARPA_INET_H
- if( !inet_aton( psz_address, &p_socket->sin_addr ) )
- #else
- p_socket->sin_addr.s_addr = inet_addr( psz_address );
- if( p_socket->sin_addr.s_addr == INADDR_NONE )
- #endif
- {
- /* We have a fqdn, try to find its address */
- if ( (p_hostent = gethostbyname( psz_address )) == NULL )
- {
- return( -1 );
- }
- /* Copy the first address of the host in the socket address */
- memcpy( &p_socket->sin_addr, p_hostent->h_addr_list[0],
- p_hostent->h_length );
- }
- }
- return( 0 );
- }
- /*****************************************************************************
- * OpenUDP: open a UDP socket
- *****************************************************************************
- * psz_bind_addr, i_bind_port : address and port used for the bind()
- * system call. If psz_bind_addr == "", the socket is bound to
- * INADDR_ANY and broadcast reception is enabled. If i_bind_port == 0,
- * 1234 is used. If psz_bind_addr is a multicast (class D) address,
- * join the multicast group.
- * psz_server_addr, i_server_port : address and port used for the connect()
- * system call. It can avoid receiving packets from unauthorized IPs.
- * Its use leads to great confusion and is currently discouraged.
- * This function returns -1 in case of error.
- *****************************************************************************/
- static int OpenUDP( vlc_object_t * p_this, network_socket_t * p_socket )
- {
- char * psz_bind_addr = p_socket->psz_bind_addr;
- int i_bind_port = p_socket->i_bind_port;
- char * psz_server_addr = p_socket->psz_server_addr;
- int i_server_port = p_socket->i_server_port;
- int i_handle, i_opt;
- socklen_t i_opt_size;
- struct sockaddr_in sock;
- vlc_value_t val;
- /* If IP_ADD_SOURCE_MEMBERSHIP is not defined in the headers
- (because it's not in glibc for example), we have to define the
- headers required for IGMPv3 here */
- #ifndef IP_ADD_SOURCE_MEMBERSHIP
- #define IP_ADD_SOURCE_MEMBERSHIP 39
- struct ip_mreq_source {
- struct in_addr imr_multiaddr;
- struct in_addr imr_interface;
- struct in_addr imr_sourceaddr;
- };
- #endif
- /* Open a SOCK_DGRAM (UDP) socket, in the AF_INET domain, automatic (0)
- * protocol */
- if( (i_handle = socket( AF_INET, SOCK_DGRAM, 0 )) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot create socket (%i)", WSAGetLastError() );
- #else
- msg_Warn( p_this, "cannot create socket (%s)", strerror(errno) );
- #endif
- return( -1 );
- }
- /* We may want to reuse an already used socket */
- i_opt = 1;
- if( setsockopt( i_handle, SOL_SOCKET, SO_REUSEADDR,
- (void *) &i_opt, sizeof( i_opt ) ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot configure socket (SO_REUSEADDR: %i)",
- WSAGetLastError() );
- #else
- msg_Warn( p_this, "cannot configure socket (SO_REUSEADDR: %s)",
- strerror(errno));
- #endif
- close( i_handle );
- return( -1 );
- }
- #ifdef SO_REUSEPORT
- i_opt = 1;
- if( setsockopt( i_handle, SOL_SOCKET, SO_REUSEPORT,
- (void *) &i_opt, sizeof( i_opt ) ) == -1 )
- {
- msg_Warn( p_this, "cannot configure socket (SO_REUSEPORT)" );
- }
- #endif
- /* Increase the receive buffer size to 1/2MB (8Mb/s during 1/2s) to avoid
- * packet loss caused by scheduling problems */
- i_opt = 0x80000;
- #if !defined( SYS_BEOS )
- if( setsockopt( i_handle, SOL_SOCKET, SO_RCVBUF, (void *) &i_opt, sizeof( i_opt ) ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Dbg( p_this, "cannot configure socket (SO_RCVBUF: %i)",
- WSAGetLastError() );
- #else
- msg_Dbg( p_this, "cannot configure socket (SO_RCVBUF: %s)",
- strerror(errno));
- #endif
- }
- #endif
- #if !defined( SYS_BEOS )
- /* Check if we really got what we have asked for, because Linux, etc.
- * will silently limit the max buffer size to net.core.rmem_max which
- * is typically only 65535 bytes */
- i_opt = 0;
- i_opt_size = sizeof( i_opt );
- if( getsockopt( i_handle, SOL_SOCKET, SO_RCVBUF, (void*) &i_opt, &i_opt_size ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot query socket (SO_RCVBUF: %i)",
- WSAGetLastError() );
- #else
- msg_Warn( p_this, "cannot query socket (SO_RCVBUF: %s)",
- strerror(errno) );
- #endif
- }
- else if( i_opt < 0x80000 )
- {
- msg_Dbg( p_this, "socket buffer size is 0x%x instead of 0x%x",
- i_opt, 0x80000 );
- }
- #endif
- /* Build the local socket */
- #if defined( WIN32 ) && !defined( UNDER_CE )
- /* Under Win32 and for multicasting, we bind to INADDR_ANY,
- * so let's call BuildAddr with "" instead of psz_bind_addr */
- if( BuildAddr( &sock, IN_MULTICAST( ntohl( inet_addr(psz_bind_addr) ) ) ?
- "" : psz_bind_addr, i_bind_port ) == -1 )
- #else
- if( BuildAddr( &sock, psz_bind_addr, i_bind_port ) == -1 )
- #endif
- {
- msg_Dbg( p_this, "could not build local address" );
- close( i_handle );
- return( -1 );
- }
- /* Bind it */
- if( bind( i_handle, (struct sockaddr *)&sock, sizeof( sock ) ) < 0 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot bind socket (%i)", WSAGetLastError() );
- #else
- msg_Warn( p_this, "cannot bind socket (%s)", strerror(errno) );
- #endif
- close( i_handle );
- return( -1 );
- }
- #if defined( WIN32 ) && !defined( UNDER_CE )
- /* Restore the sock struct so we can spare a few #ifdef WIN32 later on */
- if( IN_MULTICAST( ntohl( inet_addr(psz_bind_addr) ) ) )
- {
- if ( BuildAddr( &sock, psz_bind_addr, i_bind_port ) == -1 )
- {
- msg_Dbg( p_this, "could not build local address" );
- close( i_handle );
- return( -1 );
- }
- }
- #endif
- #if !defined( SYS_BEOS )
- /* Allow broadcast reception if we bound on INADDR_ANY */
- if( !*psz_bind_addr )
- {
- i_opt = 1;
- if( setsockopt( i_handle, SOL_SOCKET, SO_BROADCAST, (void*) &i_opt, sizeof( i_opt ) ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot configure socket (SO_BROADCAST: %i)",
- WSAGetLastError() );
- #else
- msg_Warn( p_this, "cannot configure socket (SO_BROADCAST: %s)",
- strerror(errno) );
- #endif
- }
- }
- #endif
- #if !defined( UNDER_CE ) && !defined( SYS_BEOS )
- /* Join the multicast group if the socket is a multicast address */
- if( IN_MULTICAST( ntohl(sock.sin_addr.s_addr) ) )
- {
- /* Determine interface to be used for multicast */
- char * psz_if_addr = config_GetPsz( p_this, "iface-addr" );
- /* If we have a source address, we use IP_ADD_SOURCE_MEMBERSHIP
- so that IGMPv3 aware OSes running on IGMPv3 aware networks
- will do an IGMPv3 query on the network */
- if( *psz_server_addr )
- {
- struct ip_mreq_source imr;
- imr.imr_multiaddr.s_addr = sock.sin_addr.s_addr;
- imr.imr_sourceaddr.s_addr = inet_addr(psz_server_addr);
- if( psz_if_addr != NULL && *psz_if_addr
- && inet_addr(psz_if_addr) != INADDR_NONE )
- {
- imr.imr_interface.s_addr = inet_addr(psz_if_addr);
- }
- else
- {
- imr.imr_interface.s_addr = INADDR_ANY;
- }
- if( psz_if_addr != NULL ) free( psz_if_addr );
- msg_Dbg( p_this, "IP_ADD_SOURCE_MEMBERSHIP multicast request" );
- /* Join Multicast group with source filter */
- if( setsockopt( i_handle, IPPROTO_IP, IP_ADD_SOURCE_MEMBERSHIP,
- (char*)&imr,
- sizeof(struct ip_mreq_source) ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Err( p_this, "failed to join IP multicast group (%i)",
- WSAGetLastError() );
- #else
- msg_Err( p_this, "failed to join IP multicast group (%s)",
- strerror(errno) );
- #endif
- msg_Err( p_this, "are you sure your OS supports IGMPv3?" );
- close( i_handle );
- return( -1 );
- }
- }
- /* If there is no source address, we use IP_ADD_MEMBERSHIP */
- else
- {
- struct ip_mreq imr;
- imr.imr_multiaddr.s_addr = sock.sin_addr.s_addr;
- if( psz_if_addr != NULL && *psz_if_addr
- && inet_addr(psz_if_addr) != INADDR_NONE )
- {
- imr.imr_interface.s_addr = inet_addr(psz_if_addr);
- }
- else
- {
- imr.imr_interface.s_addr = INADDR_ANY;
- }
- if( psz_if_addr != NULL ) free( psz_if_addr );
- msg_Dbg( p_this, "IP_ADD_MEMBERSHIP multicast request" );
- /* Join Multicast group without source filter */
- if( setsockopt( i_handle, IPPROTO_IP, IP_ADD_MEMBERSHIP,
- (char*)&imr, sizeof(struct ip_mreq) ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Err( p_this, "failed to join IP multicast group (%i)",
- WSAGetLastError() );
- #else
- msg_Err( p_this, "failed to join IP multicast group (%s)",
- strerror(errno) );
- #endif
- close( i_handle );
- return( -1 );
- }
- }
- }
- #endif
- if( *psz_server_addr )
- {
- /* Build socket for remote connection */
- if ( BuildAddr( &sock, psz_server_addr, i_server_port ) == -1 )
- {
- msg_Warn( p_this, "cannot build remote address" );
- close( i_handle );
- return( -1 );
- }
- /* Connect the socket */
- if( connect( i_handle, (struct sockaddr *) &sock,
- sizeof( sock ) ) == (-1) )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot connect socket (%i)", WSAGetLastError());
- #else
- msg_Warn( p_this, "cannot connect socket (%s)", strerror(errno) );
- #endif
- close( i_handle );
- return( -1 );
- }
- #if !defined( UNDER_CE ) && !defined( SYS_BEOS )
- if( IN_MULTICAST( ntohl(inet_addr(psz_server_addr) ) ) )
- {
- /* set the time-to-live */
- int i_ttl = p_socket->i_ttl;
- unsigned char ttl;
- if( i_ttl < 1 )
- {
- if( var_Get( p_this, "ttl", &val ) != VLC_SUCCESS )
- {
- var_Create( p_this, "ttl",
- VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_this, "ttl", &val );
- }
- i_ttl = val.i_int;
- }
- if( i_ttl < 1 ) i_ttl = 1;
- ttl = (unsigned char) i_ttl;
- /* There is some confusion in the world whether IP_MULTICAST_TTL
- * takes a byte or an int as an argument.
- * BSD seems to indicate byte so we are going with that and use
- * int as a fallback to be safe */
- if( setsockopt( i_handle, IPPROTO_IP, IP_MULTICAST_TTL,
- &ttl, sizeof( ttl ) ) < 0 )
- {
- msg_Dbg( p_this, "failed to set ttl (%s). Let's try it "
- "the integer way.", strerror(errno) );
- if( setsockopt( i_handle, IPPROTO_IP, IP_MULTICAST_TTL,
- &i_ttl, sizeof( i_ttl ) ) <0 )
- {
- msg_Err( p_this, "failed to set ttl (%s)",
- strerror(errno) );
- close( i_handle );
- return( -1 );
- }
- }
- }
- #endif
- }
- p_socket->i_handle = i_handle;
- if( var_Get( p_this, "mtu", &val ) != VLC_SUCCESS )
- {
- var_Create( p_this, "mtu", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_this, "mtu", &val );
- }
- p_socket->i_mtu = val.i_int;
- return( 0 );
- }
- /*****************************************************************************
- * SocketTCP: create a TCP socket
- *****************************************************************************
- * This function returns -1 in case of error.
- *****************************************************************************/
- static int SocketTCP( vlc_object_t * p_this )
- {
- int i_handle;
-
- /* Open a SOCK_STREAM (TCP) socket, in the PF_INET domain, automatic (0)
- * protocol */
- if( (i_handle = socket( PF_INET, SOCK_STREAM, 0 )) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot create socket (%i)", WSAGetLastError() );
- #else
- msg_Warn( p_this, "cannot create socket (%s)", strerror(errno) );
- #endif
- return -1;
- }
- /* Set to non-blocking */
- #if defined( WIN32 ) || defined( UNDER_CE )
- {
- unsigned long i_dummy = 1;
- if( ioctlsocket( i_handle, FIONBIO, &i_dummy ) != 0 )
- {
- msg_Err( p_this, "cannot set socket to non-blocking mode" );
- }
- }
- #else
- {
- int i_flags;
- if( ( i_flags = fcntl( i_handle, F_GETFL, 0 ) ) < 0 ||
- fcntl( i_handle, F_SETFL, i_flags | O_NONBLOCK ) < 0 )
- {
- msg_Err( p_this, "cannot set socket to non-blocking mode" );
- }
- }
- #endif
- return i_handle;
- }
- /*****************************************************************************
- * OpenTCP: open a TCP socket
- *****************************************************************************
- * psz_server_addr, i_server_port : address and port used for the connect()
- * system call. If i_server_port == 0, 80 is used.
- * Other parameters are ignored.
- * This function returns -1 in case of error.
- *****************************************************************************/
- static int OpenTCP( vlc_object_t * p_this, network_socket_t * p_socket )
- {
- char * psz_server_addr = p_socket->psz_server_addr;
- int i_server_port = p_socket->i_server_port;
- int i_handle;
- struct sockaddr_in sock;
- if( i_server_port == 0 )
- {
- i_server_port = 80;
- }
- if( (i_handle = SocketTCP( p_this )) == -1 )
- return VLC_EGENERIC;
- /* Build remote address */
- if ( BuildAddr( &sock, psz_server_addr, i_server_port ) == -1 )
- {
- msg_Dbg( p_this, "could not build local address" );
- goto error;
- }
- /* Connect the socket */
- if( connect( i_handle, (struct sockaddr *) &sock, sizeof( sock ) ) == -1 )
- {
- #if defined( WIN32 ) || defined( UNDER_CE )
- if( WSAGetLastError() == WSAEWOULDBLOCK )
- #else
- if( errno == EINPROGRESS )
- #endif
- {
- int i_ret, i_opt, i_opt_size = sizeof( i_opt ), i_max_count;
- struct timeval timeout;
- vlc_value_t val;
- fd_set fds;
- if( var_Get( p_this, "ipv4-timeout", &val ) != VLC_SUCCESS )
- {
- var_Create( p_this, "ipv4-timeout",
- VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_this, "ipv4-timeout", &val );
- }
- i_max_count = val.i_int * 1000 / 100000 /* timeout.tv_usec */;
- msg_Dbg( p_this, "connection in progress" );
- do
- {
- if( p_this->b_die || i_max_count <= 0 )
- {
- msg_Dbg( p_this, "connection aborted" );
- goto error;
- }
- i_max_count--;
- /* Initialize file descriptor set */
- FD_ZERO( &fds );
- FD_SET( i_handle, &fds );
- /* We'll wait 0.1 second if nothing happens */
- timeout.tv_sec = 0;
- timeout.tv_usec = 100000;
- } while( ( i_ret = select( i_handle + 1, NULL, &fds, NULL,
- &timeout ) ) == 0 ||
- #if defined( WIN32 ) || defined( UNDER_CE )
- ( i_ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK ) );
- #else
- ( i_ret < 0 && errno == EINTR ) );
- #endif
- if( i_ret < 0 )
- {
- msg_Warn( p_this, "cannot connect socket (select failed)" );
- goto error;
- }
- #if !defined( SYS_BEOS )
- if( getsockopt( i_handle, SOL_SOCKET, SO_ERROR, (void*)&i_opt,
- &i_opt_size ) == -1 || i_opt != 0 )
- {
- msg_Warn( p_this, "cannot connect socket (SO_ERROR)" );
- goto error;
- }
- #endif
- }
- else
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Warn( p_this, "cannot connect socket (%i)", WSAGetLastError());
- #else
- msg_Warn( p_this, "cannot connect socket (%s)", strerror(errno) );
- #endif
- goto error;
- }
- }
- p_socket->i_handle = i_handle;
- p_socket->i_mtu = 0; /* There is no MTU notion in TCP */
- return VLC_SUCCESS;
- error:
- close( i_handle );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * ListenTCP: open a TCP passive socket (server-side)
- *****************************************************************************
- * psz_server_addr, i_server_port : address and port used for the bind()
- * system call. If i_server_port == 0, 80 is used.
- * Other parameters are ignored.
- * This function returns -1 in case of error.
- *****************************************************************************/
- static int ListenTCP( vlc_object_t * p_this, network_socket_t * p_socket )
- {
- char * psz_server_addr = p_socket->psz_server_addr;
- int i_server_port = p_socket->i_server_port;
- int i_handle, i_dummy = 1;
- struct sockaddr_in sock;
- if( (i_handle = SocketTCP( p_this )) == -1 )
- return VLC_EGENERIC;
- if ( setsockopt( i_handle, SOL_SOCKET, SO_REUSEADDR,
- (void *)&i_dummy, sizeof( i_dummy ) ) == -1 )
- {
- msg_Warn( p_this, "cannot configure socket (SO_REUSEADDR)" );
- }
- /* Build remote address */
- if ( BuildAddr( &sock, psz_server_addr, i_server_port ) == -1 )
- {
- msg_Dbg( p_this, "could not build local address" );
- return VLC_EGENERIC;
- }
-
- /* Bind the socket */
- if( bind( i_handle, (struct sockaddr *) &sock, sizeof( sock )) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Err( p_this, "cannot bind socket (%i)", WSAGetLastError());
- #else
- msg_Err( p_this, "cannot bind socket (%s)", strerror(errno) );
- #endif
- goto error;
- }
-
- /* Listen */
- if( listen( i_handle, 100 ) == -1 )
- {
- #if defined(WIN32) || defined(UNDER_CE)
- msg_Err( p_this, "cannot bring socket in listening mode (%i)",
- WSAGetLastError());
- #else
- msg_Err( p_this, "cannot bring the socket in listening mode (%s)",
- strerror(errno) );
- #endif
- goto error;
- }
- p_socket->i_handle = i_handle;
- p_socket->i_mtu = 0; /* There is no MTU notion in TCP */
- return VLC_SUCCESS;
- error:
- close( i_handle );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * NetOpen: wrapper around OpenUDP, ListenTCP and OpenTCP
- *****************************************************************************/
- static int NetOpen( vlc_object_t * p_this )
- {
- network_socket_t * p_socket = p_this->p_private;
- if( p_socket->i_type == NETWORK_UDP )
- {
- return OpenUDP( p_this, p_socket );
- }
- else if( p_socket->i_type == NETWORK_TCP_PASSIVE )
- {
- return ListenTCP( p_this, p_socket );
- }
- else
- {
- return OpenTCP( p_this, p_socket );
- }
- }