/// <summary>
/// This is not a perfect implementation for a udp buffer given
/// that it relies on the packets being transferred in order.
/// Very wrong, but at the time of writing and looking at the cod
/// protocol I cannot see a way of application level ordering
/// or I lack the experience with UDP (none - first time using it)
/// to know of another way to reorder the packets without
/// any sequence ids or timestamps.
/// </summary>
/// <param name="packet"></param>
protected override void OnPacketReceived(Packet packet) {
CallOfDutyPacket callOfDutyPacket = packet as CallOfDutyPacket;
if (callOfDutyPacket != null) {
if (callOfDutyPacket.IsEOP == true && this.recvPacketBuffer == null) {
this.packetQueue.Dequeue();
base.OnPacketReceived(packet);
}
else if (callOfDutyPacket.IsEOP == true && this.recvPacketBuffer != null) {
if (this.packetQueue.Count > 0) {
this.packetQueue.Dequeue();
}
base.OnPacketReceived(recvPacketBuffer.Combine(callOfDutyPacket));
this.recvPacketBuffer = null;
}
else if (callOfDutyPacket.IsEOP == false && this.recvPacketBuffer == null) {
this.recvPacketBuffer = callOfDutyPacket;
}
else if (callOfDutyPacket.IsEOP == false && this.recvPacketBuffer != null) {
this.recvPacketBuffer = this.recvPacketBuffer.Combine(callOfDutyPacket);
}
// else - the hell happened?
}
}
public CallOfDutyPacket Combine(CallOfDutyPacket b) {
if (String.Compare(this.Command, b.Command, true) == 0) {
this.Message = this.Message + b.Message;
this.IsEOP = b.IsEOP;
}
return this;
}
public CallOfDutyClient(string hostname, ushort port)
: base(hostname, port) {
this.PacketSerializer = new CallOfDutyPacketSerializer();
this.packetQueue = new Queue<CallOfDutyPacket>();
this.recvPacketBuffer = null;
this.packetRecheck.Elapsed += new ElapsedEventHandler(packetRecheck_Elapsed);
}
/// <summary>
/// Deserializes an array of bytes into a Packet of type P
/// </summary>
/// <param name="packetData">The array to deserialize to a packet. Must be exact length of bytes.</param>
/// <returns>A new packet with data extracted from packetDate</returns>
public Packet Deserialize(byte[] packetData) {
CallOfDutyPacket packet = new CallOfDutyPacket() {
Type = PacketType.Request,
Origin = PacketOrigin.Client
};
string[] packetStrings = Encoding.ASCII.GetString(packetData, 5, packetData.Length - 5).Split(new char[] { '\n' }, 2);
if (packetStrings.Length == 2) {
packet.Command = packetStrings[0];
packet.Message = packetStrings[1];
packet.IsEOP = (packet.Message.Length == 0 || (packet.Message.Length >= 2 && packet.Message[packet.Message.Length - 1] == '\n' && packet.Message[packet.Message.Length - 2] == '\n'));
}
return packet;
}
