306 lines
7.8 KiB
C
306 lines
7.8 KiB
C
/******************************************************************************
|
|
* $Id$
|
|
*
|
|
* Copyright (c) 2005-2008 Transmission authors and contributors
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*****************************************************************************/
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#ifdef WIN32
|
|
#include <winsock2.h> /* inet_addr */
|
|
#else
|
|
#include <arpa/inet.h> /* inet_addr */
|
|
#include <netdb.h>
|
|
#include <fcntl.h>
|
|
#endif
|
|
|
|
#include <evutil.h>
|
|
|
|
#include "transmission.h"
|
|
#include "fdlimit.h"
|
|
#include "natpmp.h"
|
|
#include "net.h"
|
|
#include "peer-io.h"
|
|
#include "platform.h"
|
|
#include "utils.h"
|
|
|
|
const tr_address tr_in6addr_any = { TR_AF_INET6, { IN6ADDR_ANY_INIT } };
|
|
const tr_address tr_inaddr_any = { TR_AF_INET,
|
|
{ { { { INADDR_ANY, 0x00, 0x00, 0x00 } } } } };
|
|
|
|
|
|
void
|
|
tr_netInit( void )
|
|
{
|
|
static int initialized = FALSE;
|
|
|
|
if( !initialized )
|
|
{
|
|
#ifdef WIN32
|
|
WSADATA wsaData;
|
|
WSAStartup( MAKEWORD( 2, 2 ), &wsaData );
|
|
#endif
|
|
initialized = TRUE;
|
|
}
|
|
}
|
|
|
|
|
|
const char *
|
|
tr_ntop( const tr_address * src, char * dst, int size )
|
|
{
|
|
if( src->type == TR_AF_INET )
|
|
return inet_ntop( AF_INET, &src->addr, dst, size );
|
|
else
|
|
return inet_ntop( AF_INET6, &src->addr, dst, size );
|
|
}
|
|
|
|
/*
|
|
* Non-threadsafe version of tr_ntop, which uses a static memory area for a buffer.
|
|
* This function is suitable to be called from libTransmission's networking code,
|
|
* which is single-threaded.
|
|
*/
|
|
const char *
|
|
tr_ntop_non_ts( const tr_address * src )
|
|
{
|
|
static char buf[INET6_ADDRSTRLEN];
|
|
return tr_ntop( src, buf, sizeof( buf ) );
|
|
}
|
|
|
|
tr_address *
|
|
tr_pton( const char * src, tr_address * dst )
|
|
{
|
|
int retval = inet_pton( AF_INET, src, &dst->addr );
|
|
if( retval < 0 )
|
|
return NULL;
|
|
else if( retval == 0 )
|
|
retval = inet_pton( AF_INET6, src, &dst->addr );
|
|
else
|
|
{
|
|
dst->type = TR_AF_INET;
|
|
return dst;
|
|
}
|
|
|
|
if( retval < 1 )
|
|
return NULL;
|
|
dst->type = TR_AF_INET6;
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Compare two tr_address structures.
|
|
* Returns:
|
|
* <0 if a < b
|
|
* >0 if a > b
|
|
* 0 if a == b
|
|
*/
|
|
int
|
|
tr_compareAddresses( const tr_address * a, const tr_address * b)
|
|
{
|
|
int retval;
|
|
int addrlen;
|
|
|
|
/* IPv6 addresses are always "greater than" IPv4 */
|
|
if( a->type == TR_AF_INET && b->type == TR_AF_INET6 )
|
|
return 1;
|
|
if( a->type == TR_AF_INET6 && b->type == TR_AF_INET )
|
|
return -1;
|
|
|
|
if( a->type == TR_AF_INET )
|
|
addrlen = sizeof( struct in_addr );
|
|
else
|
|
addrlen = sizeof( struct in6_addr );
|
|
retval = memcmp( &a->addr, &b->addr, addrlen );
|
|
if( retval == 0 )
|
|
return 0;
|
|
|
|
return retval;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* TCP sockets
|
|
**********************************************************************/
|
|
|
|
int
|
|
tr_netSetTOS( int s,
|
|
int tos )
|
|
{
|
|
#ifdef IP_TOS
|
|
return setsockopt( s, IPPROTO_IP, IP_TOS, (char*)&tos, sizeof( tos ) );
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
makeSocketNonBlocking( int fd )
|
|
{
|
|
if( fd >= 0 )
|
|
{
|
|
if( evutil_make_socket_nonblocking( fd ) )
|
|
{
|
|
tr_err( _( "Couldn't create socket: %s" ),
|
|
tr_strerror( sockerrno ) );
|
|
tr_netClose( fd );
|
|
fd = -1;
|
|
}
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int
|
|
createSocket( int type )
|
|
{
|
|
return makeSocketNonBlocking( tr_fdSocketCreate( type ) );
|
|
}
|
|
|
|
static void
|
|
setSndBuf( tr_session * session UNUSED, int fd UNUSED )
|
|
{
|
|
#if 0
|
|
if( fd >= 0 )
|
|
{
|
|
const int sndbuf = session->so_sndbuf;
|
|
const int rcvbuf = session->so_rcvbuf;
|
|
setsockopt( fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof( sndbuf ) );
|
|
setsockopt( fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof( rcvbuf ) );
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
setup_sockaddr( const tr_address * addr,
|
|
tr_port port,
|
|
struct sockaddr_storage * sockaddr)
|
|
{
|
|
struct sockaddr_in sock4;
|
|
struct sockaddr_in6 sock6;
|
|
|
|
if( addr->type == TR_AF_INET )
|
|
{
|
|
memset( &sock4, 0, sizeof( sock4 ) );
|
|
sock4.sin_family = AF_INET;
|
|
sock4.sin_addr.s_addr = addr->addr.addr4.s_addr;
|
|
sock4.sin_port = port;
|
|
memcpy( sockaddr, &sock4, sizeof( sock4 ) );
|
|
}
|
|
else
|
|
{
|
|
memset( &sock6, 0, sizeof( sock6 ) );
|
|
sock6.sin6_family = AF_INET6;
|
|
sock6.sin6_port = port;
|
|
memcpy( &sock6.sin6_addr, &addr->addr, sizeof( struct in6_addr ) );
|
|
memcpy( sockaddr, &sock6, sizeof( sock6 ) );
|
|
}
|
|
}
|
|
|
|
int
|
|
tr_netOpenTCP( tr_session * session,
|
|
const tr_address * addr,
|
|
tr_port port )
|
|
{
|
|
int s;
|
|
struct sockaddr_storage sock;
|
|
const int type = SOCK_STREAM;
|
|
|
|
if( ( s = createSocket( type ) ) < 0 )
|
|
return -1;
|
|
|
|
setSndBuf( session, s );
|
|
|
|
setup_sockaddr( addr, port, &sock );
|
|
|
|
if( ( connect( s, (struct sockaddr *) &sock,
|
|
sizeof( struct sockaddr ) ) < 0 )
|
|
#ifdef WIN32
|
|
&& ( sockerrno != WSAEWOULDBLOCK )
|
|
#endif
|
|
&& ( sockerrno != EINPROGRESS ) )
|
|
{
|
|
tr_err( _( "Couldn't connect socket %d to %s, port %d (errno %d - %s)" ),
|
|
s, tr_ntop_non_ts( addr ), (int)port, sockerrno, tr_strerror( sockerrno ) );
|
|
tr_netClose( s );
|
|
s = -1;
|
|
}
|
|
|
|
tr_deepLog( __FILE__, __LINE__, NULL, "New OUTGOING connection %d (%s)",
|
|
s, tr_peerIoAddrStr( addr, port ) );
|
|
|
|
return s;
|
|
}
|
|
|
|
int
|
|
tr_netBindTCP( const tr_address * addr, tr_port port )
|
|
{
|
|
int s;
|
|
struct sockaddr_storage sock;
|
|
const int type = SOCK_STREAM;
|
|
|
|
#if defined( SO_REUSEADDR ) || defined( SO_REUSEPORT )
|
|
int optval;
|
|
#endif
|
|
|
|
if( ( s = createSocket( type ) ) < 0 )
|
|
return -1;
|
|
|
|
#ifdef SO_REUSEADDR
|
|
optval = 1;
|
|
setsockopt( s, SOL_SOCKET, SO_REUSEADDR, (char*)&optval, sizeof( optval ) );
|
|
#endif
|
|
|
|
setup_sockaddr( addr, htons( port ), &sock );
|
|
|
|
if( bind( s, (struct sockaddr *) &sock,
|
|
sizeof( struct sockaddr ) ) )
|
|
{
|
|
tr_err( _( "Couldn't bind port %d on %s: %s" ), port,
|
|
tr_ntop_non_ts( addr ), tr_strerror( sockerrno ) );
|
|
tr_netClose( s );
|
|
return -1;
|
|
}
|
|
|
|
tr_dbg( "Bound socket %d to port %d on %s",
|
|
s, port, tr_ntop_non_ts( addr ) );
|
|
return s;
|
|
}
|
|
|
|
int
|
|
tr_netAccept( tr_session * session,
|
|
int b,
|
|
tr_address * addr,
|
|
tr_port * port )
|
|
{
|
|
int fd = makeSocketNonBlocking( tr_fdSocketAccept( b, addr, port ) );
|
|
setSndBuf( session, fd );
|
|
return fd;
|
|
}
|
|
|
|
void
|
|
tr_netClose( int s )
|
|
{
|
|
tr_fdSocketClose( s );
|
|
}
|