public SendProtocol()
{
Console.WriteLine("Type path to file you want to send:");
pathToFile = Console.ReadLine();
nameAndExtension = Path.GetFileName(pathToFile) + '.' + Path.GetExtension(pathToFile);
FileProcesor procesedFile = new FileProcesor(pathToFile);
packages = procesedFile.GetPackages();
numOfPackets = procesedFile.NumOfPacket;
}
public void Main()
{
byte[] data = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 0);
UdpClient newsock = new UdpClient();
int stateMachine = 0;
try
{
while (true)
{
switch (stateMachine)
{
/*
* Initialize recive protocol.
*/
case 0:
newsock = InitializeSocket(out ipep);
stateMachine = 1;
break;
/*
* Waait to validate connection
*/
case 1:
data = newsock.Receive(ref ipep);
if (Encoding.ASCII.GetString(data) == "Validate connection")
{
data = Encoding.ASCII.GetBytes("Validate");
newsock.Send(data, data.Length, ipep);
stateMachine = 2;
}
else
{
Console.WriteLine("Bad UDP communications");
}
break;
/*
* Read data information:
* - name and extension
* - number of package
* and send confirmation
* Creating file procesor
*/
case 2:
String nameAndExtension;
int numOfPackages;
data = newsock.Receive(ref ipep);
nameAndExtension = Encoding.ASCII.GetString(data);
data = Encoding.ASCII.GetBytes("OK");
newsock.Send(data, data.Length, ipep);
data = newsock.Receive(ref ipep);
numOfPackages = Int32.Parse(Encoding.ASCII.GetString(data));
data = Encoding.ASCII.GetBytes("OK");
newsock.Send(data, data.Length, ipep);
fileProcesor = new FileProcesor(nameAndExtension, numOfPackages);
stateMachine = 3;
break;
/*
* Sending data protocol
*/
case 3:
int NumberSequencer;
for (int i = 0; i < fileProcesor.NumOfPacket; i++)
{
data = newsock.Receive(ref ipep);
NumberSequencer = Int32.Parse(Encoding.ASCII.GetString(data));
data = Encoding.ASCII.GetBytes("OK");
newsock.Send(data, data.Length, ipep);
data = newsock.Receive(ref ipep);
fileProcesor.insertPackage(NumberSequencer, data);
data = Encoding.ASCII.GetBytes("OK");
newsock.Send(data, data.Length, ipep);
}
data = newsock.Receive(ref ipep);
if (Encoding.ASCII.GetString(data) == "")
{
stateMachine = 4;
}
else
{
Console.WriteLine("Error");
stateMachine = 0;
}
break;
case 4:
fileProcesor.combineFile(fileProcesor.NumOfPacket);
stateMachine = 0;
break;
}
}
}
catch (Exception e)
{
Console.WriteLine("Something went wrong");
Console.WriteLine(e.Message);
}
}
