private void transmitNextPacket() {
// TODO: implement a serious bandwidth constraint mechanism
synchronized (_pendingPacketQueue) {
if (!_pendingPacketQueue.isEmpty()) {
// _logger.info ("CHECKING PENDING PACKET QUEUE");
MessagePacketInfo mpi = _pendingPacketQueue.peek();
int available = Math.max(_remoteWindowSize - _outstandingPacketQueue.getSize(), 0);
/*
_logger.info ("2send from PPQ: " + mpi.getPacket().getSize() +
" available: " + available +
" (win: " + _remoteWindowSize +
" opq.size: " + _outstandingPacketQueue.getSize() +
")");
*/
if (mpi != null && (mpi.getPacket().getSizeWithoutSACKChunk() < available)) {
// _logger.info ("XMIT FROM PENDING PACKET QUEUE");
// transmit packet
transmitPacket(mpi);
MessagePacket p = mpi.getPacket();
// update remote window size
_remoteWindowSize -= p.getSizeWithoutSACKChunk();
// update statistics
int sent = p.getSize();
++_mocket.getStatistics()._sentPackets;
_mocket.getStatistics()._sentBytes += sent;
_logger.info(
"XMITTED PACKET "
+ p.getSequenceNumber()
+ " SIZE "
+ p.getSize()
+ " FROM PENDING PACKET QUEUE");
_pendingPacketQueue._dump(System.err);
// move packet from the pending packet queue...
_pendingPacketQueue.remove(mpi);
_logger.info(
"REMOVED PACKET "
+ p.getSequenceNumber()
+ " SIZE "
+ p.getSize()
+ " FROM PENDING PACKET QUEUE");
_pendingPacketQueue._dump(System.err);
// ...to the outstanding queue
if (mpi.getPacket().isFlagSet(MessagePacket.HEADER_FLAG_RELIABLE)
|| mpi.getPacket().isFlagSet(MessagePacket.HEADER_FLAG_CONTROL)) {
// remove SACK chunk from packet which is going to be inserted
// in the outstanding packet queue
p.unsetSACKChunk();
_outstandingPacketQueue.insert(mpi);
}
// _logger.info ("END XMIT FROM PENDING PACKET QUEUE");
}
}
}
synchronized (_outstandingPacketQueue) {
if (!_outstandingPacketQueue.isEmpty()) {
// _logger.info ("CHECKING OUTSTANDING PACKET QUEUE");
MessagePacketInfo mpi = _outstandingPacketQueue.extractIfTimeout();
if (mpi != null) {
// _logger.info ("XMIT FROM OUTSTANDING PACKET QUEUE");
// retransmit packet
MessagePacket p = mpi.getPacket();
transmitDatagram(p, true);
_logger.info(
"XMITTED PACKET "
+ p.getSequenceNumber()
+ " SIZE "
+ p.getSize()
+ " FROM OUTSTANDING PACKET QUEUE");
_outstandingPacketQueue._dump(System.err);
// update statistics
int sent = p.getSize();
++_mocket.getStatistics()._retransmittedPackets;
_mocket.getStatistics()._sentBytes += sent;
// remove SACK chunk from packet which is going to be reinserted
// in the outstanding packet queue
p.unsetSACKChunk();
assert p.getSize() == p.getSizeWithoutSACKChunk();
// reinsert mpi at the end of the outstanding packet queue
_outstandingPacketQueue.insert(mpi);
// _logger.info ("END XMIT FROM OUTSTANDING PACKET QUEUE");
}
}
}
}
private void transmitPacket(MessagePacketInfo mpi) {
MessagePacket p = mpi.getPacket();
transmitMessagePacket(p, true);
mpi.setLastIOOperationTime(System.currentTimeMillis());
}
