public PRSMessage ParseMessage(PRSMessage Request)//Parses through message and formulates a response to be sent back
{
//error checking0. SUCCESS
//1.SERVICE_IN_USE
//2.SERVICE_NOT_FOUND
//3.ALL_PORTS_BUSY
//4.INVALID_ARG
//5.UNDEFINED_ERROR
switch (Request.msgType)
{
case PRSMessage.MsgType.CLOSE_PORT: //Closes the requested port 3 errors 2,4,5
return(PRSMessage.MakeRESPONSE(0, 0)); //Returns a success
case PRSMessage.MsgType.KEEP_ALIVE: //keeps service alive 3 errors 2,4,5
return(PRSMessage.MakeRESPONSE(0, 0)); //Returns a success
case PRSMessage.MsgType.LOOKUP_PORT: //takes a service name and gives a port error 2,4,5
return(PRSMessage.MakeRESPONSE(0, 0)); //Returns a success
case PRSMessage.MsgType.REQUEST_PORT: //Gives service lowest port 2,3,4,5
return(PRSMessage.MakeRESPONSE(0, 0)); //Returns a success
case PRSMessage.MsgType.STOP: //Server gets stopped by the Handler this sends response
return(PRSMessage.MakeRESPONSE(0, 0)); //Returns a success
default:
return(PRSMessage.MakeRESPONSE(0, 0)); //Returns a success;
}
}
private PRSMessage portdead(PRSMessage Request)
{
ManagedPort p = find_port(Request.port);
p.reserved = false;
Console.WriteLine("Marked port dead:" + p.port);
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SUCCESS, Request.port));
}
private PRSMessage lookup_port(PRSMessage Request)
{
ManagedPort p = find_service(Request.serviceName);//find the service in the list
if (p == null)
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SERVICE_NOT_FOUND, Request.port)); //if the service isnt in the list return not found
}
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SUCCESS, (ushort)p.port)); //if it is return success with port number
}
public PRSMessage ParseMessageType(PRSMessage Request)//Parses through message and formulates a response to be sent back
{
//error checking
//0. SUCCESS
//1.SERVICE_IN_USE
//2.SERVICE_NOT_FOUND
//3.ALL_PORTS_BUSY
//4.INVALID_ARG
//5.UNDEFINED_ERROR
try
{
switch (Request.msgType)//checks the type
{
case PRSMessage.MsgType.PORT_DEAD:
return(portdead(Request));
case PRSMessage.MsgType.CLOSE_PORT: //Closes the requested port 3 errors 2,4,5
//if service in msg is not at either the correct port or name
//throw out Response service not found
return(close_port(Request));
case PRSMessage.MsgType.KEEP_ALIVE: //keeps service alive 3 errors 2,4,5
//if port or service is incorrect return invalid
return(keep_alive(Request));
case PRSMessage.MsgType.LOOKUP_PORT: //takes a service name and gives a port error 2,4,5
//if not well formulated throw invalid
//if service name not correct return not found
return(lookup_port(Request));
case PRSMessage.MsgType.REQUEST_PORT: //Gives service lowest port 1,3,4,5
return(request_port(Request));
case PRSMessage.MsgType.STOP: //Server gets stopped by the Handler this sends response
//only checks message type
Console.WriteLine("Stop Has been recieved");
return(PRSMessage.MakeSTOP()); //Stop doesn't impact the port reservations so it just uses its method
default: //if not a correct message code
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.INVALID_ARG, 0)); //Returns an invalid arg
}
}
catch (Exception e)
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.UNDEFINED_ERROR, 0));//if this happened the service broke
}
}
private PRSMessage keep_alive(PRSMessage Request)
{
//check if the service and port are both valid and match
ManagedPort n = find_service(Request.serviceName);//checks if the service is valid
if (n == null)
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SERVICE_NOT_FOUND, Request.port));
}
ManagedPort p = find_port(Request.port);//Checks if the port is valid
if (p == null || p != n)
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.INVALID_ARG, Request.port));
}
p.lastAlive = DateTime.Now;
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SUCCESS, Request.port));
}
private PRSMessage close_port(PRSMessage Request)
{
//check if port and name are accurate
ManagedPort n = find_service(Request.serviceName);//checks if the service is valid
if (n == null)
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SERVICE_NOT_FOUND, Request.port));
}
ManagedPort p = find_port(Request.port);//Checks if the port is valid
if (p == null || p != n)
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.INVALID_ARG, Request.port));
}
//Actually close port
p.serviceName = null;
p.reserved = false;
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SUCCESS, Request.port));
}
private PRSMessage request_port(PRSMessage Request)
{
//check if service in use
ManagedPort sn = find_service(Request.serviceName); //if the service is in the list
if (sn != null) //check to see if it was found in the list
{
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SERVICE_IN_USE, Request.port)); //if it was its already in use
}
foreach (ManagedPort p in Ports) //for each port in the list
{
if (!p.reserved && p.serviceName == null) //check if its reserved
{
p.reserved = true; //reserve it
p.serviceName = Request.serviceName; //set the service name
p.lastAlive = DateTime.Now; //update the time
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.SUCCESS, (ushort)p.port)); //return success with port number
}
}
return(PRSMessage.MakeRESPONSE(PRSMessage.Status.ALL_PORTS_BUSY, Request.port));
}
