316 lines
8.2 KiB
C
316 lines
8.2 KiB
C
/*
|
|
* This file Copyright (C) Mnemosyne LLC
|
|
*
|
|
* This file is licensed by the GPL version 2. Works owned by the
|
|
* Transmission project are granted a special exemption to clause 2(b)
|
|
* so that the bulk of its code can remain under the MIT license.
|
|
* This exemption does not extend to derived works not owned by
|
|
* the Transmission project.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef SYSTEM_MINIUPNP
|
|
#include <miniupnpc/miniupnpc.h>
|
|
#include <miniupnpc/upnpcommands.h>
|
|
#else
|
|
#include <miniupnp/miniupnpc.h>
|
|
#include <miniupnp/upnpcommands.h>
|
|
#endif
|
|
|
|
#ifdef SYS_DARWIN
|
|
#define HAVE_MINIUPNP_16 1
|
|
#endif
|
|
|
|
#include "transmission.h"
|
|
#include "port-forwarding.h"
|
|
#include "session.h"
|
|
#include "upnp.h"
|
|
#include "utils.h"
|
|
|
|
static const char *
|
|
getKey( void ) { return _( "Port Forwarding (UPnP)" ); }
|
|
|
|
typedef enum
|
|
{
|
|
TR_UPNP_IDLE,
|
|
TR_UPNP_ERR,
|
|
TR_UPNP_DISCOVER,
|
|
TR_UPNP_MAP,
|
|
TR_UPNP_UNMAP
|
|
}
|
|
tr_upnp_state;
|
|
|
|
struct tr_upnp
|
|
{
|
|
bool hasDiscovered;
|
|
struct UPNPUrls urls;
|
|
struct IGDdatas data;
|
|
int port;
|
|
char lanaddr[16];
|
|
unsigned int isMapped;
|
|
tr_upnp_state state;
|
|
};
|
|
|
|
/**
|
|
***
|
|
**/
|
|
|
|
tr_upnp*
|
|
tr_upnpInit( void )
|
|
{
|
|
tr_upnp * ret = tr_new0( tr_upnp, 1 );
|
|
|
|
ret->state = TR_UPNP_DISCOVER;
|
|
ret->port = -1;
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
tr_upnpClose( tr_upnp * handle )
|
|
{
|
|
assert( !handle->isMapped );
|
|
assert( ( handle->state == TR_UPNP_IDLE )
|
|
|| ( handle->state == TR_UPNP_ERR )
|
|
|| ( handle->state == TR_UPNP_DISCOVER ) );
|
|
|
|
if( handle->hasDiscovered )
|
|
FreeUPNPUrls( &handle->urls );
|
|
tr_free( handle );
|
|
}
|
|
|
|
/**
|
|
*** Wrappers for miniupnpc functions
|
|
**/
|
|
|
|
static struct UPNPDev *
|
|
tr_upnpDiscover( int msec )
|
|
{
|
|
int err = 0;
|
|
struct UPNPDev * ret = NULL;
|
|
|
|
#if defined(HAVE_MINIUPNP_16)
|
|
ret = upnpDiscover( msec, NULL, NULL, 0, 0, &err );
|
|
#elif defined(HAVE_MINIUPNP_15)
|
|
ret = upnpDiscover( msec, NULL, NULL, 0 );
|
|
#else
|
|
ret = UPNPCOMMAND_UNKNOWN_ERROR;
|
|
#endif
|
|
|
|
if( ret != UPNPCOMMAND_SUCCESS )
|
|
tr_ndbg( getKey( ), "upnpDiscover failed (errno %d - %s)", err, tr_strerror( err ) );
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
tr_upnpGetSpecificPortMappingEntry( tr_upnp * handle, const char * proto )
|
|
{
|
|
int err;
|
|
char intClient[16];
|
|
char intPort[16];
|
|
char portStr[16];
|
|
|
|
*intClient = '\0';
|
|
*intPort = '\0';
|
|
|
|
tr_snprintf( portStr, sizeof( portStr ), "%d", (int)handle->port );
|
|
|
|
#if defined(HAVE_MINIUPNP_16)
|
|
err = UPNP_GetSpecificPortMappingEntry( handle->urls.controlURL, handle->data.first.servicetype, portStr, proto, intClient, intPort, NULL, NULL, NULL );
|
|
#elif defined(HAVE_MINIUPNP_15)
|
|
err = UPNP_GetSpecificPortMappingEntry( handle->urls.controlURL, handle->data.first.servicetype, portStr, proto, intClient, intPort );
|
|
#else
|
|
err = UPNPCOMMAND_UNKNOWN_ERROR;
|
|
#endif
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
tr_upnpAddPortMapping( const tr_upnp * handle, const char * proto, tr_port port, const char * desc )
|
|
{
|
|
int err;
|
|
const int old_errno = errno;
|
|
char portStr[16];
|
|
errno = 0;
|
|
|
|
tr_snprintf( portStr, sizeof( portStr ), "%d", (int)port );
|
|
|
|
#if defined(HAVE_MINIUPNP_16)
|
|
err = UPNP_AddPortMapping( handle->urls.controlURL, handle->data.first.servicetype, portStr, portStr, handle->lanaddr, desc, proto, NULL, NULL );
|
|
#elif defined(HAVE_MINIUPNP_15)
|
|
err = UPNP_AddPortMapping( handle->urls.controlURL, handle->data.first.servicetype, portStr, portStr, handle->lanaddr, desc, proto, NULL );
|
|
#else
|
|
err = UPNPCOMMAND_UNKNOWN_ERROR;
|
|
#endif
|
|
|
|
if( err )
|
|
tr_ndbg( getKey( ), "%s Port forwarding failed with error %d (errno %d - %s)", proto, err, errno, tr_strerror( errno ) );
|
|
|
|
errno = old_errno;
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
tr_upnpDeletePortMapping( const tr_upnp * handle, const char * proto, tr_port port )
|
|
{
|
|
char portStr[16];
|
|
|
|
tr_snprintf( portStr, sizeof( portStr ), "%d", (int)port );
|
|
|
|
UPNP_DeletePortMapping( handle->urls.controlURL,
|
|
handle->data.first.servicetype,
|
|
portStr, proto, NULL );
|
|
}
|
|
|
|
/**
|
|
***
|
|
**/
|
|
|
|
enum
|
|
{
|
|
UPNP_IGD_NONE = 0,
|
|
UPNP_IGD_VALID_CONNECTED = 1,
|
|
UPNP_IGD_VALID_NOT_CONNECTED = 2,
|
|
UPNP_IGD_INVALID = 3
|
|
};
|
|
|
|
int
|
|
tr_upnpPulse( tr_upnp * handle,
|
|
int port,
|
|
int isEnabled,
|
|
int doPortCheck )
|
|
{
|
|
int ret;
|
|
|
|
if( isEnabled && ( handle->state == TR_UPNP_DISCOVER ) )
|
|
{
|
|
struct UPNPDev * devlist;
|
|
|
|
devlist = tr_upnpDiscover( 2000 );
|
|
|
|
errno = 0;
|
|
if( UPNP_GetValidIGD( devlist, &handle->urls, &handle->data,
|
|
handle->lanaddr, sizeof( handle->lanaddr ) ) == UPNP_IGD_VALID_CONNECTED )
|
|
{
|
|
tr_ninf( getKey( ), _(
|
|
"Found Internet Gateway Device \"%s\"" ),
|
|
handle->urls.controlURL );
|
|
tr_ninf( getKey( ), _(
|
|
"Local Address is \"%s\"" ), handle->lanaddr );
|
|
handle->state = TR_UPNP_IDLE;
|
|
handle->hasDiscovered = 1;
|
|
}
|
|
else
|
|
{
|
|
handle->state = TR_UPNP_ERR;
|
|
tr_ndbg(
|
|
getKey( ), "UPNP_GetValidIGD failed (errno %d - %s)",
|
|
errno,
|
|
tr_strerror( errno ) );
|
|
tr_ndbg(
|
|
getKey( ),
|
|
"If your router supports UPnP, please make sure UPnP is enabled!" );
|
|
}
|
|
freeUPNPDevlist( devlist );
|
|
}
|
|
|
|
if( handle->state == TR_UPNP_IDLE )
|
|
{
|
|
if( handle->isMapped && ( !isEnabled || ( handle->port != port ) ) )
|
|
handle->state = TR_UPNP_UNMAP;
|
|
}
|
|
|
|
if( isEnabled && handle->isMapped && doPortCheck )
|
|
{
|
|
if( ( tr_upnpGetSpecificPortMappingEntry( handle, "TCP" ) != UPNPCOMMAND_SUCCESS ) ||
|
|
( tr_upnpGetSpecificPortMappingEntry( handle, "UDP" ) != UPNPCOMMAND_SUCCESS ) )
|
|
{
|
|
tr_ninf( getKey( ), _( "Port %d isn't forwarded" ), handle->port );
|
|
handle->isMapped = false;
|
|
}
|
|
}
|
|
|
|
if( handle->state == TR_UPNP_UNMAP )
|
|
{
|
|
tr_upnpDeletePortMapping( handle, "TCP", handle->port );
|
|
tr_upnpDeletePortMapping( handle, "UDP", handle->port );
|
|
|
|
tr_ninf( getKey( ),
|
|
_( "Stopping port forwarding through \"%s\", service \"%s\"" ),
|
|
handle->urls.controlURL, handle->data.first.servicetype );
|
|
|
|
handle->isMapped = 0;
|
|
handle->state = TR_UPNP_IDLE;
|
|
handle->port = -1;
|
|
}
|
|
|
|
if( handle->state == TR_UPNP_IDLE )
|
|
{
|
|
if( isEnabled && !handle->isMapped )
|
|
handle->state = TR_UPNP_MAP;
|
|
}
|
|
|
|
if( handle->state == TR_UPNP_MAP )
|
|
{
|
|
int err_tcp = -1;
|
|
int err_udp = -1;
|
|
errno = 0;
|
|
|
|
if( !handle->urls.controlURL || !handle->data.first.servicetype )
|
|
handle->isMapped = 0;
|
|
else
|
|
{
|
|
char desc[64];
|
|
tr_snprintf( desc, sizeof( desc ), "%s at %d", TR_NAME, port );
|
|
|
|
err_tcp = tr_upnpAddPortMapping( handle, "TCP", port, desc );
|
|
err_udp = tr_upnpAddPortMapping( handle, "UDP", port, desc );
|
|
|
|
handle->isMapped = !err_tcp | !err_udp;
|
|
}
|
|
tr_ninf( getKey( ),
|
|
_( "Port forwarding through \"%s\", service \"%s\". (local address: %s:%d)" ),
|
|
handle->urls.controlURL, handle->data.first.servicetype,
|
|
handle->lanaddr, port );
|
|
if( handle->isMapped )
|
|
{
|
|
tr_ninf( getKey( ), "%s", _( "Port forwarding successful!" ) );
|
|
handle->port = port;
|
|
handle->state = TR_UPNP_IDLE;
|
|
}
|
|
else
|
|
{
|
|
tr_ndbg( getKey( ), "If your router supports UPnP, please make sure UPnP is enabled!" );
|
|
handle->port = -1;
|
|
handle->state = TR_UPNP_ERR;
|
|
}
|
|
}
|
|
|
|
switch( handle->state )
|
|
{
|
|
case TR_UPNP_DISCOVER:
|
|
ret = TR_PORT_UNMAPPED; break;
|
|
|
|
case TR_UPNP_MAP:
|
|
ret = TR_PORT_MAPPING; break;
|
|
|
|
case TR_UPNP_UNMAP:
|
|
ret = TR_PORT_UNMAPPING; break;
|
|
|
|
case TR_UPNP_IDLE:
|
|
ret = handle->isMapped ? TR_PORT_MAPPED
|
|
: TR_PORT_UNMAPPED; break;
|
|
|
|
default:
|
|
ret = TR_PORT_ERROR; break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|