public void handleUpdatePacket(Packet p, String from) {
// dont update packets that came from this device
if (p.getSource().equals(localDevice.getBluetoothAddress())) return;
// get the md5 of the payload of the packet and store it
// if the previous md5 is the same with the new one
// then this packet is redundant
String hash = md5(p.getPayload());
if (history.containsKey(p.getSource())) {
String old = history.get(p.getSource());
if (old.equals(hash)) return;
}
ByteBuffer buffer = ByteBuffer.allocate(p.getPayload().length);
buffer.put(p.getPayload());
routingTable.remove(p.getSource());
routingTable.add(p.getSource());
byte[] tmp = new byte[12];
while (buffer.hasRemaining()) {
buffer.get(tmp, 0, 12);
routingTable.add(p.getSource(), new String(tmp));
}
for (String address : connections.keySet()) {
if (!address.equals(from)) {
connections.get(address).offer(p);
}
}
history.put(p.getSource(), hash);
}
protected void print(Packet p) {
if (paperStock > 0) {
System.out.printf("%s: impression de «%s»\n", name, p.getPayload());
paperStock--;
} else {
System.out.printf("%s: bac vide!\n", name);
}
}
@Override
public void encode(IoSession session, Object in, ProtocolEncoderOutput out) throws Exception {
Packet p = (Packet) in;
/*
* Check what type the packet is.
*/
if (p.isRaw()) {
/*
* If the packet is raw, send its payload.
*/
out.write(p.getPayload());
} else {
/*
* If not, get the out ISAAC cipher.
*/
// ISAACCipher outCipher = ((Player)
// session.getAttribute("player")).getOutCipher();
/*
* Get the packet attributes.
*/
int opcode = p.getOpcode();
Packet.Type type = p.getType();
int length = p.getLength();
/*
* Encrypt the packet opcode.
*/
// opcode += outCipher.getNextValue();
/*
* Compute the required size for the buffer.
*/
int finalLength = length + 1;
switch (type) {
case VARIABLE:
finalLength += 1;
break;
case VARIABLE_SHORT:
finalLength += 2;
break;
}
/*
* Create the buffer and write the opcode (and length if the packet
* is variable-length).
*/
IoBuffer buffer = IoBuffer.allocate(finalLength);
buffer.put((byte) opcode);
switch (type) {
case VARIABLE:
buffer.put((byte) length);
break;
case VARIABLE_SHORT:
buffer.putShort((short) length);
break;
}
/*
* Write the payload itself.
*/
buffer.put(p.getPayload());
/*
* Flip and dispatch the packet.
*/
out.write(buffer.flip());
}
}
