private static PRSMessage ExpectMessage(Socket clientSocket, string expectedMessage)
{
// receive message and validate that expected PRSMessage was received
EndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
PRSMessage msg = PRSMessage.ReceiveMessage(clientSocket, ref remoteEP);
if (msg.ToString() != expectedMessage)
{
throw new Exception("Test failed! Expected " + expectedMessage);
}
return(msg);
}
static void Main(string[] args)
{
// defaults
ushort SERVER_PORT = 30000;
ushort STARTING_CLIENT_PORT = 40000;
ushort ENDING_CLIENT_PORT = 40099;
int KEEP_ALIVE_TIMEOUT = 10; //300
try
{
// -p < service port >
// -s < starting client port number >
// -e < ending client port number >
// -t < keep alive time in seconds >
for (int i = 0; i < args.Length; i++)
{
if (args[i] == "-p")
{
SERVER_PORT = ushort.Parse(args[i + 1]);
}
if (args[i] == "-s")
{
SERVER_PORT = ushort.Parse(args[i + 1]);
}
if (args[i] == "-e")
{
ENDING_CLIENT_PORT = ushort.Parse(args[i + 1]);
}
if (args[i] == "-t")
{
KEEP_ALIVE_TIMEOUT = int.Parse(args[i + 1]);
}
}
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
Console.WriteLine(ex.StackTrace);
}
// initialize the PRS server
PRS prs = new PRS(STARTING_CLIENT_PORT, ENDING_CLIENT_PORT, KEEP_ALIVE_TIMEOUT);
// create the socket for receiving messages at the server
Socket listeningSocket = new Socket(SocketType.Dgram, ProtocolType.Udp);
// bind the listening socket to the PRS server port
listeningSocket.Bind(new IPEndPoint(IPAddress.Any, SERVER_PORT));
//
// Process client messages
//
while (!prs.Stopped)
{
EndPoint clientEndPoint = null;
try
{
// receive a message from a client
clientEndPoint = new IPEndPoint(IPAddress.Any, 0);
PRSMessage msg = PRSMessage.ReceiveMessage(listeningSocket, ref clientEndPoint);
// let the PRS handle the message
PRSMessage response = prs.HandleMessage(msg);
// send response message back to client
response.SendMessage(listeningSocket, clientEndPoint);
}
catch (Exception ex)
{
// attempt to send a UNDEFINED_ERROR response to the client, if we know who that was
if (clientEndPoint != null)
{
PRSMessage errorMsg = new PRSMessage(PRSMessage.MESSAGE_TYPE.RESPONSE, "", 0, PRSMessage.STATUS.UNDEFINED_ERROR);
errorMsg.SendMessage(listeningSocket, clientEndPoint);
}
}
}
// close the listening socket
listeningSocket.Close();
// wait for a keypress from the user before closing the console window
Console.WriteLine("Press Enter to exit");
Console.ReadKey();
}
static void Main(string[] args)
{
// defaults
ushort SERVER_PORT = 30000;
ushort STARTING_CLIENT_PORT = 40000;
ushort ENDING_CLIENT_PORT = 40099;
int KEEP_ALIVE_TIMEOUT = 10;
try
{
// process command options
// -p < service port >
// -s < starting client port number >
// -e < ending client port number >
// -t < keep alive time in seconds >
for (int i = 0; i < args.Length; i++)
{
switch (args[i])
{
case "-p":
SERVER_PORT = Convert.ToUInt16(args[++i]);
break;
case "-s":
STARTING_CLIENT_PORT = Convert.ToUInt16(args[++i]);
break;
case "-e":
ENDING_CLIENT_PORT = Convert.ToUInt16(args[++i]);
break;
case "-t":
KEEP_ALIVE_TIMEOUT = Convert.ToInt16(args[++i]);
break;
}
}
if (STARTING_CLIENT_PORT <= SERVER_PORT || STARTING_CLIENT_PORT >= ENDING_CLIENT_PORT)
{
throw new Exception("Invalid range: -p must be outside of -s to -e range and -e must be larger then -s");
}
}
catch (Exception ex)
{
Console.WriteLine("Invalid Command line Arguments");
Console.WriteLine(ex);
Usage();
}
// initialize the PRS server
PRS prs = new PRS(STARTING_CLIENT_PORT, ENDING_CLIENT_PORT, KEEP_ALIVE_TIMEOUT);
// create the socket for receiving messages at the server
Socket listeningSocket = new Socket(SocketType.Dgram, ProtocolType.Udp);
// bind the listening socket to the PRS server port
listeningSocket.Bind(new IPEndPoint(IPAddress.Any, SERVER_PORT));
// Process client messages
while (!prs.Stopped)
{
EndPoint clientEndPoint = null;
try
{
// receive a message from a client
clientEndPoint = new IPEndPoint(IPAddress.Any, 0);
PRSMessage msg = PRSMessage.ReceiveMessage(listeningSocket, ref clientEndPoint);
// let the PRS handle the message
PRSMessage responMessage = prs.HandleMessage(msg);
// send response message back to client
responMessage.SendMessage(listeningSocket, clientEndPoint);
}
catch (Exception ex)
{
// attempt to send a UNDEFINED_ERROR response to the client, if we know who that was
if (clientEndPoint != null)
{
PRSMessage errorMessage = new PRSMessage(PRSMessage.MESSAGE_TYPE.RESPONSE, "", 0, PRSMessage.STATUS.UNDEFINED_ERROR);
}
}
}
// close the listening socket
listeningSocket.Close();
// wait for a keypress from the user before closing the console window
Console.WriteLine("Press Enter to exit");
Console.ReadKey();
}
static void Main(string[] args)
{
// defaults
ushort SERVER_PORT = 30000;
ushort STARTING_CLIENT_PORT = 40000;
ushort ENDING_CLIENT_PORT = 40099;
int KEEP_ALIVE_TIMEOUT = 300;
// process command options
// -p < service port >
// -s < starting client port number >
// -e < ending client port number >
// -t < keep alive time in seconds >
for (int i = 0; i < args.Length; i++)
{
switch (args[i])
{
case "-p":
{
SERVER_PORT = ushort.Parse(args[++i]);
}
break;
case "-s":
{
STARTING_CLIENT_PORT = ushort.Parse(args[++i]);
}
break;
case "-e":
{
ENDING_CLIENT_PORT = ushort.Parse(args[++i]);
}
break;
case "-t":
{
KEEP_ALIVE_TIMEOUT = int.Parse(args[++i]);
}
break;
default:
{
Console.WriteLine($"Error: Invalid argument - {args[i]}");
return;
}
}
}
// check for valid STARTING_CLIENT_PORT and ENDING_CLIENT_PORT
if (STARTING_CLIENT_PORT >= ENDING_CLIENT_PORT ||
STARTING_CLIENT_PORT == 0 ||
ENDING_CLIENT_PORT == 0 ||
STARTING_CLIENT_PORT == SERVER_PORT ||
ENDING_CLIENT_PORT == SERVER_PORT)
{
Console.WriteLine("Error: Invalid starting and/or ending port(s)");
return;
}
Console.WriteLine("Server starting...");
Console.WriteLine($"\tServer port: {SERVER_PORT}");
Console.WriteLine($"\tStarting port: {STARTING_CLIENT_PORT}");
Console.WriteLine($"\tEnding port: {ENDING_CLIENT_PORT}");
Console.WriteLine($"\tTimeout: {KEEP_ALIVE_TIMEOUT}");
// initialize the PRS server
PRS prs = new PRS(STARTING_CLIENT_PORT, ENDING_CLIENT_PORT, KEEP_ALIVE_TIMEOUT);
// create the socket for receiving messages at the server
Socket socket = new Socket(SocketType.Dgram, ProtocolType.Udp);
// bind the listening socket to the PRS server port
socket.Bind(new IPEndPoint(IPAddress.Any, SERVER_PORT));
//
// Process client messages
//
while (!prs.Stopped)
{
try
{
// receive a message from a client
EndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
PRSMessage messageReceived = PRSMessage.ReceiveMessage(socket, ref remoteEndPoint);
// let the PRS handle the message
PRSMessage messageResponse = prs.HandleMessage(messageReceived);
// send response message back to client
messageResponse.SendMessage(socket, remoteEndPoint);
}
catch (Exception ex)
{
// attempt to send a UNDEFINED_ERROR response to the client, if we know who that was
Console.WriteLine(ex.Message);
}
}
// close the listening socket
socket.Close();
// wait for a keypress from the user before closing the console window
Console.WriteLine("Press Enter to exit");
Console.ReadKey();
}
