DataInputStream is = new DataInputStream(new ByteArrayInputStream(input_buffer, 0, packet_data_length ));
try{
String client_ip_address = request_dg.getAddress().getHostAddress();
PRUDPPacketRequest request = PRUDPPacketRequest.deserialiseRequest( null, is );
Logger.log(new LogEvent(LOGID,
"TRTrackerServerProcessorUDP: packet received: "
+ request.getString()));
PRUDPPacket reply = null;
TRTrackerServerTorrentImpl torrent = null;
if ( auth_user_bytes != null ){
// user name is irrelevant as we only have one at the moment
//<parg_home> so <new_packet> = <old_packet> + <user_padded_to_8_bytes> + <hash>
//<parg_home> where <hash> = first 8 bytes of sha1(<old_packet> + <user_padded_to_8> + sha1(pass))
//<XTF> Yes
byte[] sha1_pw = null;
if ( server.hasExternalAuthorisation()){
try{
URL resource = new URL( "udp://" + server.getHost() + ":" + server.getPort() + "/" );
sha1_pw = server.performExternalAuthorisation( resource, auth_user );
}catch( MalformedURLException e ){
Debug.printStackTrace( e );
}
if ( sha1_pw == null ){
Logger.log(new LogEvent(LOGID, LogEvent.LT_ERROR,
"TRTrackerServerProcessorUDP: auth fails for user '"
+ auth_user + "'"));
reply = new PRUDPPacketReplyError( request.getTransactionId(), "Access Denied" );
}
}else{
sha1_pw = server.getPassword();
}
// if we haven't already failed then check the PW
if ( reply == null ){
SHA1Hasher hasher = new SHA1Hasher();
hasher.update( input_buffer, 0, packet_data_length);
hasher.update( auth_user_bytes );
hasher.update( sha1_pw );
byte[] digest = hasher.getDigest();
for (int i=0;i<auth_hash.length;i++){
if ( auth_hash[i] != digest[i] ){
Logger.log(new LogEvent(LOGID, LogEvent.LT_ERROR,
"TRTrackerServerProcessorUDP: auth fails for user '"
+ auth_user + "'"));
reply = new PRUDPPacketReplyError( request.getTransactionId(), "Access Denied" );
break;
}
}
}
}
int request_type = TRTrackerServerRequest.RT_UNKNOWN;
if ( reply == null ){
if ( server.isEnabled()){
try{
int type = request.getAction();
if ( type == PRUDPPacketTracker.ACT_REQUEST_CONNECT ){
reply = handleConnect( client_ip_address, request );
}else if (type == PRUDPPacketTracker.ACT_REQUEST_ANNOUNCE ){
Object[] x = handleAnnounceAndScrape( client_ip_address, request, TRTrackerServerRequest.RT_ANNOUNCE );
if ( x == null ){
throw( new Exception( "Connection ID mismatch" ));
}
reply = (PRUDPPacket)x[0];
torrent = (TRTrackerServerTorrentImpl)x[1];
request_type = TRTrackerServerRequest.RT_ANNOUNCE;
}else if ( type == PRUDPPacketTracker.ACT_REQUEST_SCRAPE ){
Object[] x = handleAnnounceAndScrape( client_ip_address, request, TRTrackerServerRequest.RT_SCRAPE );
if ( x == null ){
throw( new Exception( "Connection ID mismatch" ));
}
reply = (PRUDPPacket)x[0];
torrent = (TRTrackerServerTorrentImpl)x[1];
request_type = TRTrackerServerRequest.RT_SCRAPE;
}else{
reply = new PRUDPPacketReplyError( request.getTransactionId(), "unsupported action");
}
}catch( Throwable e ){
// e.printStackTrace();
String error = e.getMessage();
if ( error == null ){
error = e.toString();
}
reply = new PRUDPPacketReplyError( request.getTransactionId(), error );
}
}else{
System.out.println( "UDP Tracker: replying 'disabled' to " + client_ip_address );
reply = new PRUDPPacketReplyError( request.getTransactionId(), "UDP Tracker disabled" );
}
}
if ( reply != null ){