/*

Jabber Protocol Plugin for Miranda IM
Copyright ( C ) 2002-04  Santithorn Bunchua
Copyright ( C ) 2005-11  George Hazan
Copyright ( C ) 2007     Maxim Mluhov

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  02111-1307, USA.

Revision       : $Revision: 13575 $
Last change on : $Date: 2011-04-10 18:28:57 -0400 (Sun, 10 Apr 2011) $
Last change by : $Author: borkra $

*/

#include "jabber.h"
#include <io.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "jabber_iq.h"
#include "jabber_byte.h"
#include "jabber_ibb.h"
#include "jabber_caps.h"

void CJabberProto::FtCancel( filetransfer* ft )
{
	JABBER_LIST_ITEM *item;
	JABBER_BYTE_TRANSFER *jbt;
	JABBER_IBB_TRANSFER *jibb;

	Log( "Invoking JabberFtCancel()" );

	// For file sending session that is still in si negotiation phase
	if ( m_iqManager.ExpireByUserData( ft ))
		return;
	// For file receiving session that is still in si negotiation phase
	LISTFOREACH(i, this, LIST_FTRECV)
	{
		item = ListGetItemPtrFromIndex( i );
		if ( item->ft == ft ) {
			Log( "Canceling file receiving session while in si negotiation" );
			ListRemoveByIndex( i );
			JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, ft, 0 );
			delete ft;
			return;
		}
	}
	// For file transfer through bytestream
	if (( jbt=ft->jbt ) != NULL ) {
		Log( "Canceling bytestream session" );
		jbt->state = JBT_ERROR;
		if ( jbt->hConn ) {
			Log( "Force closing bytestream session" );
			Netlib_CloseHandle( jbt->hConn );
			jbt->hConn = NULL;
		}
		if ( jbt->hSendEvent ) SetEvent( jbt->hSendEvent );
		if ( jbt->hEvent ) SetEvent( jbt->hEvent );
		if ( jbt->hProxyEvent ) SetEvent( jbt->hProxyEvent );
	}
	// For file transfer through IBB
	if (( jibb=ft->jibb ) != NULL ) {
		Log( "Canceling IBB session" );
		jibb->state = JIBB_ERROR;
		m_iqManager.ExpireByUserData( jibb );
	}
}

///////////////// File sending using stream initiation /////////////////////////

void CJabberProto::FtInitiate( TCHAR* jid, filetransfer* ft )
{
	TCHAR *rs;
	TCHAR *filename, *p;
	int i;
	TCHAR sid[9];

	if ( jid==NULL || ft==NULL || !m_bJabberOnline || ( rs=ListGetBestClientResourceNamePtr( jid ))==NULL ) {
		if ( ft ) {
			JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_FAILED, ft, 0 );
			delete ft;
		}
		return;
	}
	ft->type = FT_SI;
	for ( i=0; i<8; i++ )
		sid[i] = ( rand()%10 ) + '0';
	sid[8] = '\0';
	if ( ft->sid != NULL ) mir_free( ft->sid );
	ft->sid = mir_tstrdup( sid );
	filename = ft->std.ptszFiles[ ft->std.currentFileNumber ];
	if (( p = _tcsrchr( filename, '\\' )) != NULL )
		filename = p+1;

	TCHAR tszJid[ 512 ];
	mir_sntprintf( tszJid, SIZEOF(tszJid), _T("%s/%s"), jid, rs );

	XmlNodeIq iq( m_iqManager.AddHandler( &CJabberProto::OnFtSiResult, JABBER_IQ_TYPE_SET, tszJid, JABBER_IQ_PARSE_FROM | JABBER_IQ_PARSE_TO, -1, ft ));
	HXML si = iq << XCHILDNS( _T("si"), _T(JABBER_FEAT_SI)) << XATTR( _T("id"), sid ) 
						<< XATTR( _T("mime-type"), _T("binary/octet-stream")) << XATTR( _T("profile"), _T(JABBER_FEAT_SI_FT));
	si << XCHILDNS( _T("file"), _T(JABBER_FEAT_SI_FT)) << XATTR( _T("name"), filename) 
		<< XATTRI64( _T("size"), ft->fileSize[ ft->std.currentFileNumber ] ) << XCHILD( _T("desc"), ft->szDescription);
	
	HXML field = si << XCHILDNS( _T("feature"), _T(JABBER_FEAT_FEATURE_NEG))
							<< XCHILDNS( _T("x"), _T(JABBER_FEAT_DATA_FORMS)) << XATTR( _T("type"), _T("form"))
							<< XCHILD( _T("field")) << XATTR( _T("var"), _T("stream-method")) << XATTR( _T("type"), _T("list-single"));

	BOOL bDirect = m_options.BsDirect;
	BOOL bProxy = m_options.BsProxyManual;
	
	// bytestreams support?
	if ( bDirect || bProxy )
		field << XCHILD( _T("option")) << XCHILD( _T("value"), _T(JABBER_FEAT_BYTESTREAMS));

	field << XCHILD( _T("option")) << XCHILD( _T("value"), _T(JABBER_FEAT_IBB));
	m_ThreadInfo->send( iq );
}

void CJabberProto::OnFtSiResult( HXML iqNode, CJabberIqInfo* pInfo )
{
	HXML siNode, featureNode, xNode, fieldNode, valueNode;
	filetransfer *ft = (filetransfer *)pInfo->GetUserData();
	if ( !ft ) return;

	if (( pInfo->GetIqType() == JABBER_IQ_TYPE_RESULT ) && pInfo->m_szFrom && pInfo->m_szTo ) {
		if (( siNode = xmlGetChild( iqNode , "si" )) != NULL ) {

			// fix for very smart clients, like gajim
			BOOL bDirect = m_options.BsDirect;
			BOOL bProxy = m_options.BsProxyManual;

			if (( featureNode = xmlGetChild( siNode , "feature" )) != NULL ) {
				if (( xNode = xmlGetChildByTag( featureNode, "x", "xmlns", _T(JABBER_FEAT_DATA_FORMS))) != NULL ) {
					if (( fieldNode = xmlGetChildByTag( xNode, "field", "var", _T("stream-method"))) != NULL ) {
						if (( valueNode = xmlGetChild( fieldNode , "value" ))!=NULL && xmlGetText( valueNode )!=NULL ) {
							if (( bDirect || bProxy ) && !_tcscmp( xmlGetText( valueNode ), _T(JABBER_FEAT_BYTESTREAMS))) {
								// Start Bytestream session
								JABBER_BYTE_TRANSFER *jbt = new JABBER_BYTE_TRANSFER;
								ZeroMemory( jbt, sizeof( JABBER_BYTE_TRANSFER ));
								jbt->srcJID = mir_tstrdup( pInfo->m_szTo );
								jbt->dstJID = mir_tstrdup( pInfo->m_szFrom );
								jbt->sid = mir_tstrdup( ft->sid );
								jbt->pfnSend = &CJabberProto::FtSend;
								jbt->pfnFinal = &CJabberProto::FtSendFinal;
								jbt->ft = ft;
								ft->type = FT_BYTESTREAM;
								ft->jbt = jbt;
								JForkThread(( JThreadFunc )&CJabberProto::ByteSendThread, jbt );
							} else if ( !_tcscmp( xmlGetText( valueNode ), _T(JABBER_FEAT_IBB))) {
								JABBER_IBB_TRANSFER *jibb = (JABBER_IBB_TRANSFER *) mir_alloc( sizeof ( JABBER_IBB_TRANSFER ));
								ZeroMemory( jibb, sizeof( JABBER_IBB_TRANSFER ));
								jibb->srcJID = mir_tstrdup( pInfo->m_szTo );
								jibb->dstJID = mir_tstrdup( pInfo->m_szFrom );
								jibb->sid = mir_tstrdup( ft->sid );
								jibb->pfnSend = &CJabberProto::FtIbbSend;
								jibb->pfnFinal = &CJabberProto::FtSendFinal;
								jibb->ft = ft;
								ft->type = FT_IBB;
								ft->jibb = jibb;
								JForkThread(( JThreadFunc )&CJabberProto::IbbSendThread, jibb );
	}	}	}	}	}	}	}
	else {
		Log( "File transfer stream initiation request denied or failed" );
		JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, pInfo->GetIqType() == JABBER_IQ_TYPE_ERROR ? ACKRESULT_DENIED : ACKRESULT_FAILED, ft, 0 );
		delete ft;
	}
}

BOOL CJabberProto::FtSend( HANDLE hConn, filetransfer* ft )
{
	struct _stati64 statbuf;
	int fd;
	char* buffer;
	int numRead;

	Log( "Sending [%s]", ft->std.ptszFiles[ ft->std.currentFileNumber ] );
	_tstati64( ft->std.ptszFiles[ ft->std.currentFileNumber ], &statbuf );	// file size in statbuf.st_size
	if (( fd = _topen( ft->std.ptszFiles[ ft->std.currentFileNumber ], _O_BINARY|_O_RDONLY )) < 0 ) {
		Log( "File cannot be opened" );
		return FALSE;
	}

	ft->std.flags |= PFTS_SENDING;
	ft->std.currentFileSize = statbuf.st_size;
	ft->std.currentFileProgress = 0;

	if (( buffer=( char* )mir_alloc( 2048 )) != NULL ) {
		while (( numRead=_read( fd, buffer, 2048 )) > 0 ) {
			if ( Netlib_Send( hConn, buffer, numRead, 0 ) != numRead ) {
				mir_free( buffer );
				_close( fd );
				return FALSE;
			}
			ft->std.currentFileProgress += numRead;
			ft->std.totalProgress += numRead;
			JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_DATA, ft, ( LPARAM )&ft->std );
		}
		mir_free( buffer );
	}
	_close( fd );
	return TRUE;
}

BOOL CJabberProto::FtIbbSend( int blocksize, filetransfer* ft )
{
	struct _stati64 statbuf;
	int fd;
	char* buffer;
	int numRead;

	Log( "Sending [%s]", ft->std.ptszFiles[ ft->std.currentFileNumber ] );
	_tstati64( ft->std.ptszFiles[ ft->std.currentFileNumber ], &statbuf );	// file size in statbuf.st_size
	if (( fd = _topen( ft->std.ptszFiles[ ft->std.currentFileNumber ], _O_BINARY|_O_RDONLY )) < 0 ) {
		Log( "File cannot be opened" );
		return FALSE;
	}

	ft->std.flags |= PFTS_SENDING;
	ft->std.currentFileSize = statbuf.st_size;
	ft->std.currentFileProgress = 0;

	if (( buffer=( char* )mir_alloc( blocksize )) != NULL ) {
		while (( numRead=_read( fd, buffer, blocksize )) > 0 ) {
			int iqId = SerialNext();
			XmlNode msg( _T("message"));
			xmlAddAttr( msg, _T("to"), ft->jibb->dstJID );
			msg << XATTRID( iqId );

			// let others send data too
			Sleep(2);

			char *encoded = JabberBase64Encode(buffer, numRead);

			msg << XCHILD( _T("data"), _A2T(encoded)) << XATTR( _T("xmlns"), _T(JABBER_FEAT_IBB))
				<< XATTR( _T("sid"), ft->jibb->sid ) << XATTRI( _T("seq"), ft->jibb->wPacketId );

			HXML ampNode = msg << XCHILDNS( _T("amp"), _T(JABBER_FEAT_AMP));
			ampNode << XCHILD( _T("rule")) << XATTR( _T("condition"), _T("deliver-at"))
				<< XATTR( _T("value"), _T("stored")) << XATTR( _T("action"), _T("error"));
			ampNode << XCHILD( _T("rule")) << XATTR( _T("condition"), _T("match-resource"))
				<< XATTR( _T("value"), _T("exact")) << XATTR( _T("action"), _T("error"));
			ft->jibb->wPacketId++;

			mir_free( encoded );

			if ( ft->jibb->state == JIBB_ERROR || ft->jibb->bStreamClosed || m_ThreadInfo->send( msg ) == SOCKET_ERROR ) {
				Log( "JabberFtIbbSend unsuccessful exit" );
				mir_free( buffer );
				_close( fd );
				return FALSE;
			}

			ft->jibb->dwTransferredSize += (DWORD)numRead;

			ft->std.currentFileProgress += numRead;
			ft->std.totalProgress += numRead;
			JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_DATA, ft, ( LPARAM )&ft->std );
		}
		mir_free( buffer );
	}
	_close( fd );
	return TRUE;
}

void CJabberProto::FtSendFinal( BOOL success, filetransfer* ft )
{
	if ( !success ) {
		Log( "File transfer complete with error" );
		JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ft->state == FT_DENIED ? ACKRESULT_DENIED : ACKRESULT_FAILED, ft, 0 );
	}
	else {
		if ( ft->std.currentFileNumber < ft->std.totalFiles-1 ) {
			ft->std.currentFileNumber++;
			replaceStr( ft->std.tszCurrentFile, ft->std.ptszFiles[ ft->std.currentFileNumber ] );
			JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_NEXTFILE, ft, 0 );
			FtInitiate( ft->jid, ft );
			return;
		}

		JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_SUCCESS, ft, 0 );
	}

	delete ft;
}

///////////////// File receiving through stream initiation /////////////////////////

void CJabberProto::FtHandleSiRequest( HXML iqNode )
{
	const TCHAR* from, *sid, *str, *szId, *filename;
	HXML siNode, fileNode, featureNode, xNode, fieldNode, n;
	int i;
    unsigned __int64 filesize;

	if ( !iqNode ||
		  ( from = xmlGetAttrValue( iqNode, _T("from"))) == NULL ||
		  ( str = xmlGetAttrValue( iqNode,  _T("type"))) == NULL || _tcscmp( str, _T("set")) ||
		  ( siNode = xmlGetChildByTag( iqNode, "si", "xmlns", _T(JABBER_FEAT_SI))) == NULL )
		return;

	szId = xmlGetAttrValue( iqNode,  _T("id"));
	if (( sid = xmlGetAttrValue( siNode,  _T("id"))) != NULL &&
		( fileNode = xmlGetChildByTag( siNode, "file", "xmlns", _T(JABBER_FEAT_SI_FT))) != NULL &&
		( filename = xmlGetAttrValue( fileNode,  _T("name"))) != NULL &&
		( str = xmlGetAttrValue( fileNode,  _T("size"))) != NULL ) {

		filesize = _ttoi64( str );
		if (( featureNode = xmlGetChildByTag( siNode, "feature", "xmlns", _T(JABBER_FEAT_FEATURE_NEG))) != NULL &&
			( xNode = xmlGetChildByTag( featureNode, "x", "xmlns", _T(JABBER_FEAT_DATA_FORMS)))!=NULL &&
			( fieldNode = xmlGetChildByTag( xNode, "field", "var", _T("stream-method")))!=NULL ) {

			BOOL bIbbOnly = m_options.BsOnlyIBB;
			HXML optionNode = NULL;
			JABBER_FT_TYPE ftType = FT_OOB;

			if ( !bIbbOnly ) {
				for ( i=0; ; i++ ) {
					optionNode = xmlGetChild( fieldNode ,i);
					if ( !optionNode )
						break;
	
					if ( !lstrcmp( xmlGetName( optionNode ), _T("option"))) {
						if (( n = xmlGetChild( optionNode , "value" )) != NULL && xmlGetText( n ) ) {
							if ( !_tcscmp( xmlGetText( n ), _T(JABBER_FEAT_BYTESTREAMS))) {
								ftType = FT_BYTESTREAM;
								break;
			}	}	}	}	}

			// try IBB only if bytestreams support not found or BsOnlyIBB flag exists
			if ( bIbbOnly || !optionNode ) {
				for ( i=0; ; i++ ) {
					optionNode = xmlGetChild( fieldNode ,i);
					if ( !optionNode )
						break;

					if ( !lstrcmp( xmlGetName( optionNode ), _T("option"))) {
						if (( n = xmlGetChild( optionNode , "value" )) != NULL && xmlGetText( n ) ) {
							if ( !_tcscmp( xmlGetText( n ), _T(JABBER_FEAT_IBB))) {
								ftType = FT_IBB;
								break;
			}	}	}	}	}

			if ( optionNode != NULL ) {
				// Found known stream mechanism
				filetransfer* ft = new filetransfer( this );
				ft->dwExpectedRecvFileSize = filesize;
				ft->jid = mir_tstrdup( from );
				ft->std.hContact = HContactFromJID( from );
				ft->sid = mir_tstrdup( sid );
				ft->iqId = mir_tstrdup( szId );
				ft->type = ftType;
				ft->std.totalFiles = 1;
				ft->std.tszCurrentFile = mir_tstrdup( filename );
				ft->std.totalBytes = ft->std.currentFileSize = filesize;

				PROTORECVFILET pre = { 0 };
				pre.flags = PREF_TCHAR;
				pre.fileCount = 1;
				pre.timestamp = time( NULL );
				pre.ptszFiles = ( TCHAR** )&filename;
				pre.lParam = ( LPARAM )ft;
				if (( n = xmlGetChild( fileNode , "desc" )) != NULL )
					pre.tszDescription = ( TCHAR* )xmlGetText( n );

				CCSDATA ccs = { ft->std.hContact, PSR_FILE, 0, ( LPARAM )&pre };
				JCallService( MS_PROTO_CHAINRECV, 0, ( LPARAM )&ccs );
				return;
			}
			else {
				// Unknown stream mechanism
				XmlNodeIq iq( _T("error"), szId, from );
				HXML e = iq << XCHILD( _T("error")) << XATTRI( _T("code"), 400 ) << XATTR( _T("type"), _T("cancel"));
				e << XCHILDNS( _T("bad-request"), _T("urn:ietf:params:xml:ns:xmpp-stanzas"));
				e << XCHILDNS( _T("no-valid-streams"), _T(JABBER_FEAT_SI));
				m_ThreadInfo->send( iq );
				return;
	}	}	}

	// Bad stream initiation, reply with bad-profile
	XmlNodeIq iq( _T("error"), szId, from );
	HXML e = iq << XCHILD( _T("error")) << XATTRI( _T("code"), 400 ) << XATTR( _T("type"), _T("cancel"));
	e << XCHILDNS( _T("bad-request"), _T("urn:ietf:params:xml:ns:xmpp-stanzas"));
	e << XCHILDNS( _T("bad-profile"), _T(JABBER_FEAT_SI));
	m_ThreadInfo->send( iq );
}

void CJabberProto::FtAcceptSiRequest( filetransfer* ft )
{
	if ( !m_bJabberOnline || ft==NULL || ft->jid==NULL || ft->sid==NULL ) return;

	JABBER_LIST_ITEM *item;
	if (( item=ListAdd( LIST_FTRECV, ft->sid )) != NULL ) {
		item->ft = ft;

		m_ThreadInfo->send(
			XmlNodeIq( _T("result"), ft->iqId, ft->jid )
				<< XCHILDNS( _T("si"), _T(JABBER_FEAT_SI))
				<< XCHILDNS( _T("feature"), _T(JABBER_FEAT_FEATURE_NEG))
				<< XCHILDNS( _T("x"), _T(JABBER_FEAT_DATA_FORMS)) << XATTR( _T("type"), _T("submit"))
				<< XCHILD( _T("field")) << XATTR( _T("var"), _T("stream-method"))
				<< XCHILD( _T("value"), _T(JABBER_FEAT_BYTESTREAMS)));
}	}

void CJabberProto::FtAcceptIbbRequest( filetransfer* ft )
{
	if ( !m_bJabberOnline || ft==NULL || ft->jid==NULL || ft->sid==NULL ) return;

	JABBER_LIST_ITEM *item;
	if (( item=ListAdd( LIST_FTRECV, ft->sid )) != NULL ) {
		item->ft = ft;

		m_ThreadInfo->send(
			XmlNodeIq( _T("result"), ft->iqId, ft->jid )
				<< XCHILDNS( _T("si"), _T(JABBER_FEAT_SI))
				<< XCHILDNS( _T("feature"), _T(JABBER_FEAT_FEATURE_NEG))
				<< XCHILDNS( _T("x"), _T(JABBER_FEAT_DATA_FORMS)) << XATTR( _T("type"), _T("submit"))
				<< XCHILD( _T("field")) << XATTR( _T("var"), _T("stream-method"))
				<< XCHILD( _T("value"), _T(JABBER_FEAT_IBB)));
}	}

BOOL CJabberProto::FtHandleBytestreamRequest( HXML iqNode, CJabberIqInfo* pInfo )
{
	HXML queryNode = pInfo->GetChildNode();

	const TCHAR* sid;
	JABBER_LIST_ITEM *item;

	if (( sid = xmlGetAttrValue( queryNode, _T("sid"))) != NULL && ( item = ListGetItemPtr( LIST_FTRECV, sid )) != NULL ) {
		// Start Bytestream session
		JABBER_BYTE_TRANSFER *jbt = new JABBER_BYTE_TRANSFER;
		ZeroMemory( jbt, sizeof( JABBER_BYTE_TRANSFER ));
		jbt->iqNode = xi.copyNode( iqNode );
		jbt->pfnRecv = &CJabberProto::FtReceive;
		jbt->pfnFinal = &CJabberProto::FtReceiveFinal;
		jbt->ft = item->ft;
		item->ft->jbt = jbt;
		JForkThread(( JThreadFunc )&CJabberProto::ByteReceiveThread, jbt );
		ListRemove( LIST_FTRECV, sid );
		return TRUE;
	}

	Log( "File transfer invalid bytestream initiation request received" );
	return TRUE;
}

BOOL CJabberProto::FtHandleIbbRequest( HXML iqNode, BOOL bOpen )
{
	if ( !iqNode ) return FALSE;

	const TCHAR *id = xmlGetAttrValue( iqNode, _T("id"));
	const TCHAR *from = xmlGetAttrValue( iqNode, _T("from"));
	const TCHAR *to = xmlGetAttrValue( iqNode, _T("to"));
	if ( !id || !from || !to ) return FALSE;

	HXML ibbNode = xmlGetChildByTag( iqNode, bOpen ? "open" : "close", "xmlns", _T(JABBER_FEAT_IBB));
	if ( !ibbNode ) return FALSE;

	const TCHAR *sid = xmlGetAttrValue( ibbNode, _T("sid"));
	if ( !sid ) return FALSE;

	// already closed?
	JABBER_LIST_ITEM *item = ListGetItemPtr( LIST_FTRECV, sid );
	if ( !item ) {
		m_ThreadInfo->send(
			XmlNodeIq( _T("error"), id, from )
				<< XCHILD( _T("error")) << XATTRI( _T("code"), 404 ) << XATTR( _T("type"), _T("cancel"))
					<< XCHILDNS( _T("item-not-found"), _T("urn:ietf:params:xml:ns:xmpp-stanzas")));
		return FALSE;
	}

	// open event
	if ( bOpen ) {
		if ( !item->jibb ) {
			JABBER_IBB_TRANSFER *jibb = ( JABBER_IBB_TRANSFER * ) mir_alloc( sizeof( JABBER_IBB_TRANSFER ));
			ZeroMemory( jibb, sizeof( JABBER_IBB_TRANSFER ));
			jibb->srcJID = mir_tstrdup( from );
			jibb->dstJID = mir_tstrdup( to );
			jibb->sid = mir_tstrdup( sid );
			jibb->pfnRecv = &CJabberProto::FtReceive;
			jibb->pfnFinal = &CJabberProto::FtReceiveFinal;
			jibb->ft = item->ft;
			item->ft->jibb = jibb;
			item->jibb = jibb;
			JForkThread(( JThreadFunc )&CJabberProto::IbbReceiveThread, jibb );

			m_ThreadInfo->send( XmlNodeIq( _T("result"), id, from ));
			return TRUE;
		}
		// stream already open
		m_ThreadInfo->send(
			XmlNodeIq( _T("error"), id, from )
				<< XCHILD( _T("error")) << XATTRI( _T("code"), 404 ) << XATTR( _T("type"), _T("cancel"))
					<< XCHILDNS( _T("item-not-found"), _T("urn:ietf:params:xml:ns:xmpp-stanzas")));
		return FALSE;
	}
	
	// close event && stream already open
	if ( item->jibb && item->jibb->hEvent ) {
		item->jibb->bStreamClosed = TRUE;
		SetEvent( item->jibb->hEvent );

		m_ThreadInfo->send( XmlNodeIq( _T("result"), id, from ));
		return TRUE;
	}

	ListRemove( LIST_FTRECV, sid );

	return FALSE;
}

int CJabberProto::FtReceive( HANDLE, filetransfer* ft, char* buffer, int datalen )
{
	if ( ft->create() == -1 )
		return -1;

	__int64 remainingBytes = ft->std.currentFileSize - ft->std.currentFileProgress;
	if ( remainingBytes > 0 ) {
		int writeSize = ( remainingBytes<datalen ) ? remainingBytes : datalen;
		if ( _write( ft->fileId, buffer, writeSize ) != writeSize ) {
			Log( "_write() error" );
			return -1;
		}

		ft->std.currentFileProgress += writeSize;
		ft->std.totalProgress += writeSize;
		JSendBroadcast( ft->std.hContact, ACKTYPE_FILE, ACKRESULT_DATA, ft, ( LPARAM )&ft->std );
		return ( ft->std.currentFileSize == ft->std.currentFileProgress ) ? 0 : writeSize;
	}

	return 0;
}

void CJabberProto::FtReceiveFinal( BOOL success, filetransfer* ft )
{
	if ( success ) {
		Log( "File transfer complete successfully" );
		ft->complete();
	}
	else Log( "File transfer complete with error" );

	delete ft;
}
