mirror of
https://github.com/transmission/transmission
synced 2024-12-25 17:17:31 +00:00
405 lines
10 KiB
C
405 lines
10 KiB
C
/******************************************************************************
|
|
* $Id$
|
|
*
|
|
* Copyright (c) 2005-2006 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 "transmission.h"
|
|
|
|
/***********************************************************************
|
|
* DNS resolution
|
|
**********************************************************************/
|
|
|
|
/***********************************************************************
|
|
* tr_netResolve
|
|
***********************************************************************
|
|
* Synchronous "resolution": only works with character strings
|
|
* representing numbers expressed in the Internet standard `.' notation.
|
|
* Returns a non-zero value if an error occurs.
|
|
**********************************************************************/
|
|
int tr_netResolve( char * address, struct in_addr * addr )
|
|
{
|
|
addr->s_addr = inet_addr( address );
|
|
return ( addr->s_addr == 0xFFFFFFFF );
|
|
}
|
|
|
|
/* TODO: Make this code reentrant */
|
|
static tr_thread_t resolveThread;
|
|
static tr_lock_t resolveLock;
|
|
static volatile int resolveDie;
|
|
static tr_resolve_t * resolveQueue;
|
|
|
|
static void resolveRelease ( tr_resolve_t * );
|
|
static void resolveFunc ( void * );
|
|
|
|
struct tr_resolve_s
|
|
{
|
|
int status;
|
|
char * address;
|
|
struct in_addr addr;
|
|
|
|
int refcount;
|
|
tr_resolve_t * next;
|
|
};
|
|
|
|
/***********************************************************************
|
|
* tr_netResolveThreadInit
|
|
***********************************************************************
|
|
* Initializes the static variables used for resolution and launch the
|
|
* gethostbyname thread.
|
|
**********************************************************************/
|
|
void tr_netResolveThreadInit()
|
|
{
|
|
resolveDie = 0;
|
|
resolveQueue = NULL;
|
|
tr_lockInit( &resolveLock );
|
|
tr_threadCreate( &resolveThread, resolveFunc, NULL );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* tr_netResolveThreadClose
|
|
***********************************************************************
|
|
* Notices the gethostbyname thread that is should terminate. Doesn't
|
|
* wait until it does, in case it is stuck in a resolution: we let it
|
|
* die and clean itself up.
|
|
**********************************************************************/
|
|
void tr_netResolveThreadClose()
|
|
{
|
|
tr_lockLock( &resolveLock );
|
|
resolveDie = 1;
|
|
tr_lockUnlock( &resolveLock );
|
|
tr_wait( 200 );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* tr_netResolveInit
|
|
***********************************************************************
|
|
* Adds an address to the resolution queue.
|
|
**********************************************************************/
|
|
tr_resolve_t * tr_netResolveInit( char * address )
|
|
{
|
|
tr_resolve_t * r;
|
|
|
|
r = malloc( sizeof( tr_resolve_t ) );
|
|
r->status = TR_RESOLVE_WAIT;
|
|
r->address = strdup( address );
|
|
r->refcount = 2;
|
|
r->next = NULL;
|
|
|
|
tr_lockLock( &resolveLock );
|
|
if( !resolveQueue )
|
|
{
|
|
resolveQueue = r;
|
|
}
|
|
else
|
|
{
|
|
tr_resolve_t * iter;
|
|
for( iter = resolveQueue; iter->next; iter = iter->next );
|
|
iter->next = r;
|
|
}
|
|
tr_lockUnlock( &resolveLock );
|
|
|
|
return r;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* tr_netResolvePulse
|
|
***********************************************************************
|
|
* Checks the current status of a resolution.
|
|
**********************************************************************/
|
|
int tr_netResolvePulse( tr_resolve_t * r, struct in_addr * addr )
|
|
{
|
|
int ret;
|
|
|
|
tr_lockLock( &resolveLock );
|
|
ret = r->status;
|
|
if( ret == TR_RESOLVE_OK )
|
|
{
|
|
*addr = r->addr;
|
|
}
|
|
tr_lockUnlock( &resolveLock );
|
|
|
|
return ret;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* tr_netResolveClose
|
|
***********************************************************************
|
|
*
|
|
**********************************************************************/
|
|
void tr_netResolveClose( tr_resolve_t * r )
|
|
{
|
|
resolveRelease( r );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* resolveRelease
|
|
***********************************************************************
|
|
* The allocated tr_resolve_t structures should be freed when
|
|
* tr_netResolveClose was called *and* it was removed from the queue.
|
|
* This can happen in any order, so we use a refcount to know we can
|
|
* take it out.
|
|
**********************************************************************/
|
|
static void resolveRelease( tr_resolve_t * r )
|
|
{
|
|
if( --r->refcount < 1 )
|
|
{
|
|
free( r->address );
|
|
free( r );
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* resolveFunc
|
|
***********************************************************************
|
|
* Keeps waiting for addresses to resolve, and removes them from the
|
|
* queue once resolution is done.
|
|
**********************************************************************/
|
|
static void resolveFunc( void * arg UNUSED )
|
|
{
|
|
tr_resolve_t * r;
|
|
struct hostent * host;
|
|
|
|
tr_dbg( "Resolve thread started" );
|
|
|
|
tr_lockLock( &resolveLock );
|
|
|
|
while( !resolveDie )
|
|
{
|
|
if( !( r = resolveQueue ) )
|
|
{
|
|
/* TODO: Use a condition wait */
|
|
tr_lockUnlock( &resolveLock );
|
|
tr_wait( 50 );
|
|
tr_lockLock( &resolveLock );
|
|
continue;
|
|
}
|
|
|
|
/* Blocking resolution */
|
|
tr_lockUnlock( &resolveLock );
|
|
host = gethostbyname( r->address );
|
|
tr_lockLock( &resolveLock );
|
|
|
|
if( host )
|
|
{
|
|
memcpy( &r->addr, host->h_addr, host->h_length );
|
|
r->status = TR_RESOLVE_OK;
|
|
}
|
|
else
|
|
{
|
|
r->status = TR_RESOLVE_ERROR;
|
|
}
|
|
|
|
resolveQueue = r->next;
|
|
resolveRelease( r );
|
|
}
|
|
|
|
/* Clean up */
|
|
tr_lockUnlock( &resolveLock );
|
|
tr_lockClose( &resolveLock );
|
|
while( ( r = resolveQueue ) )
|
|
{
|
|
resolveQueue = r->next;
|
|
resolveRelease( r );
|
|
}
|
|
|
|
tr_dbg( "Resolve thread exited" );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* TCP sockets
|
|
**********************************************************************/
|
|
|
|
static int makeSocketNonBlocking( int s )
|
|
{
|
|
int flags;
|
|
|
|
#ifdef SYS_BEOS
|
|
flags = 1;
|
|
if( setsockopt( s, SOL_SOCKET, SO_NONBLOCK,
|
|
&flags, sizeof( int ) ) < 0 )
|
|
#else
|
|
if( ( flags = fcntl( s, F_GETFL, 0 ) ) < 0 ||
|
|
fcntl( s, F_SETFL, flags | O_NONBLOCK ) < 0 )
|
|
#endif
|
|
{
|
|
tr_err( "Could not set socket to non-blocking mode (%s)",
|
|
strerror( errno ) );
|
|
tr_netClose( s );
|
|
return -1;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static int createSocket()
|
|
{
|
|
int s;
|
|
|
|
s = socket( AF_INET, SOCK_STREAM, 0 );
|
|
if( s < 0 )
|
|
{
|
|
tr_err( "Could not create socket (%s)", strerror( errno ) );
|
|
return -1;
|
|
}
|
|
|
|
return makeSocketNonBlocking( s );
|
|
}
|
|
|
|
int tr_netOpen( struct in_addr addr, in_port_t port )
|
|
{
|
|
int s;
|
|
struct sockaddr_in sock;
|
|
|
|
s = createSocket();
|
|
if( s < 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
memset( &sock, 0, sizeof( sock ) );
|
|
sock.sin_family = AF_INET;
|
|
sock.sin_addr.s_addr = addr.s_addr;
|
|
sock.sin_port = port;
|
|
|
|
if( connect( s, (struct sockaddr *) &sock,
|
|
sizeof( struct sockaddr_in ) ) < 0 &&
|
|
errno != EINPROGRESS )
|
|
{
|
|
tr_err( "Could not connect socket (%s)", strerror( errno ) );
|
|
tr_netClose( s );
|
|
return -1;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
int tr_netBind( int port )
|
|
{
|
|
int s;
|
|
struct sockaddr_in sock;
|
|
#ifdef SO_REUSEADDR
|
|
int optval;
|
|
#endif
|
|
|
|
s = createSocket();
|
|
if( s < 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
#ifdef SO_REUSEADDR
|
|
optval = 1;
|
|
setsockopt( s, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof( optval ) );
|
|
#endif
|
|
|
|
memset( &sock, 0, sizeof( sock ) );
|
|
sock.sin_family = AF_INET;
|
|
sock.sin_addr.s_addr = INADDR_ANY;
|
|
sock.sin_port = htons( port );
|
|
|
|
if( bind( s, (struct sockaddr *) &sock,
|
|
sizeof( struct sockaddr_in ) ) )
|
|
{
|
|
tr_err( "Could not bind port %d", port );
|
|
tr_netClose( s );
|
|
return -1;
|
|
}
|
|
|
|
tr_inf( "Binded port %d", port );
|
|
listen( s, 5 );
|
|
|
|
return s;
|
|
}
|
|
|
|
int tr_netAccept( int s, struct in_addr * addr, in_port_t * port )
|
|
{
|
|
int t;
|
|
unsigned len;
|
|
struct sockaddr_in sock;
|
|
|
|
len = sizeof( sock );
|
|
t = accept( s, (struct sockaddr *) &sock, &len );
|
|
|
|
if( t < 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
*addr = sock.sin_addr;
|
|
*port = sock.sin_port;
|
|
|
|
return makeSocketNonBlocking( t );
|
|
}
|
|
|
|
int tr_netSend( int s, uint8_t * buf, int size )
|
|
{
|
|
int ret;
|
|
|
|
ret = send( s, buf, size, 0 );
|
|
if( ret < 0 )
|
|
{
|
|
if( errno == ENOTCONN || errno == EAGAIN || errno == EWOULDBLOCK )
|
|
{
|
|
ret = TR_NET_BLOCK;
|
|
}
|
|
else
|
|
{
|
|
ret = TR_NET_CLOSE;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int tr_netRecv( int s, uint8_t * buf, int size )
|
|
{
|
|
int ret;
|
|
|
|
ret = recv( s, buf, size, 0 );
|
|
if( ret < 0 )
|
|
{
|
|
if( errno == EAGAIN || errno == EWOULDBLOCK )
|
|
{
|
|
ret = TR_NET_BLOCK;
|
|
}
|
|
else
|
|
{
|
|
ret = TR_NET_CLOSE;
|
|
}
|
|
}
|
|
if( !ret )
|
|
{
|
|
ret = TR_NET_CLOSE;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void tr_netClose( int s )
|
|
{
|
|
#ifdef BEOS_NETSERVER
|
|
closesocket( s );
|
|
#else
|
|
close( s );
|
|
#endif
|
|
}
|