Not getting a full response from a rcon request to a server

I am using C# to query a Call of Duty 4 rcon to get status for the players, it works fine but it does not appear to receive a response of more than 1303 characters.

public string sendCommand(string rconCommand, string ga开发者_开发技巧meServerIP,
    string password, int gameServerPort)
{
    Socket client = new Socket(AddressFamily.InterNetwork,
                               SocketType.Dgram,
                               ProtocolType.Udp);
    client.Connect(IPAddress.Parse(gameServerIP), gameServerPort);

    string command;
    command = "rcon " + password + " " + rconCommand;
    byte[] bufferTemp = Encoding.ASCII.GetBytes(command);
    byte[] bufferSend = new byte[bufferTemp.Length + 4];

    bufferSend[0] = byte.Parse("255");
    bufferSend[1] = byte.Parse("255");
    bufferSend[2] = byte.Parse("255");
    bufferSend[3] = byte.Parse("255");
    int j = 4;

    for (int i = 0; i < bufferTemp.Length; i++)
    {
        bufferSend[j++] = bufferTemp[i];
    }

    IPEndPoint RemoteIpEndPoint
        = new IPEndPoint(IPAddress.Parse(gameServerIP), 0);
    client.Send(bufferSend, SocketFlags.None);
    byte[] bufferRec = new byte[64999];
    client.Receive(bufferRec);
    return Encoding.ASCII.GetString(bufferRec);
}

Apparently other people seem not have a problem with this but I am having problems with it. Does any one have any ideas?

My memory of the Quake RCON protocol is hazy, but I believe the special header is 5 bytes, 0xFF 0xFF 0xFF 0xFF 0x02. If that is not the case for COD4, then ignore this advice.

Additionally, you can't rely on the data being received all in one call to Socket.Receive. And my experience with Quake RCON is isn't always the best in returning, "as expected".

byte[] bufferSend = new byte[bufferTemp.Length + 5 ];
bufferSend[0] = 0xFF;
bufferSend[1] = 0xFF;
bufferSend[2] = 0xFF;
bufferSend[3] = 0xFF;
bufferSend[4] = 0x02;
Buffer.BlockCopy(bufferTemp, 0, bufferSend, 5, bufferTemp.Length);
...

StringBuilder response = new StringBuilder();
byte[] bufferRecv = new byte[65536];
do
{
    // loop on receiving the bytes
    int bytesReceived = client.Receive(bufferRecv);

    // only decode the bytes received
    response.Append(Encoding.ASCII.GetString(bufferRecv, 0, bytesReceived));
} while (client.Available > 0);

return response.ToString();