static void Main(string[] args)
{
//create a new server
var server = new UdpListener();
//start listening for messages and copy the messages back to the client
Task.Factory.StartNew(async () =>
{
while (true)
{
var received = await server.Receive();
server.Reply("ack " + received.Message, received.Sender);
Console.WriteLine(received.Message);
if (received.Message == "quit")
break;
}
});
//create a new client
var client = UdpUser.ConnectTo(Credentials.IPAddress, 32123);
//wait for reply messages from server and send them to console
Task.Factory.StartNew(async () =>
{
while (true)
{
try
{
var received = await client.Receive();
Console.WriteLine(received.Message);
if (received.Message.Contains("quit"))
break;
}
catch (Exception ex)
{
Debug.Write(ex);
}
}
});
//type ahead :-)
string read;
do
{
read = Console.ReadLine();
client.Send(read);
} while (read != "quit");
}
public bool receive(UdpListener receiver, string fileName, Int32 fileSize)
{
//Byte[][] bytes = new Byte[fileSize/1024][];
SortedDictionary<Int32, Byte[]> bytes = new SortedDictionary<int, byte[]>();
bool endReception = false;
Task.Factory.StartNew(async () =>
{
var FIN = false;
bool endFile = false;
int counter = 0;
while (!FIN)
{
var received = await receiver.Receive();
if (!bytes.Keys.Contains(received.packet.SequenceNumber))
{
bytes[received.packet.SequenceNumber] = received.packet.DATA;
counter++;
}
receiver.Reply(new Packet(0, received.packet.SequenceNumber, false, false, 0, new byte[0]).BuildPacket(), received.Sender);
if(received.packet.FIN == true)
{
endFile = true;
}
if (bytes.Keys.Max() == counter && endFile)
{
FIN = true;
byte[] file = Extensions.Combine(bytes.Values.ToArray());
System.IO.FileStream fileStream = new System.IO.FileStream(fileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
fileStream.Write(file, 0, file.Length);
fileStream.Close();
endReception = true;
}
}
});
while (!endReception) { }
return endReception;
}
public void start()
{
/* Créer un socket et attendre la demande du client */
var server = new UdpListener(new IPEndPoint(IPAddress.Any, 32123));
//start listening for messages and copy the messages back to the client
Task.Factory.StartNew(async () =>
{
while (true)
{
Received received = await server.Receive();
if (received.packet.SOR == false)
{
UdpListener receiver = new UdpListener(new IPEndPoint(IPAddress.Any, Extensions.FreeUdpPort()));
Byte[] portNumber = new Byte[4];
portNumber = BitConverter.GetBytes(((IPEndPoint)receiver.Client.Client.LocalEndPoint).Port);
server.Reply(new Packet(0, received.packet.SequenceNumber, false, false, portNumber.Length, portNumber).BuildPacket(), received.Sender);
Reception reception = new Reception();
reception.receive(receiver, System.Text.Encoding.UTF8.GetString(received.packet.DATA), received.packet.DataLength);
}
else
{
UdpUser sender = UdpUser.ConnectTo(received.Sender.Address.ToString(), received.Sender.Port);
string fileName = System.Text.Encoding.UTF8.GetString(received.packet.DATA);
await Task.Factory.StartNew(async () =>
{
var ack = await sender.Receive();
if (ack.packet.AckNumber == 0)
{
sender = UdpUser.ConnectTo(Credentials.IPAddress, received.Sender.Port);
CommunicationBase.Handshake = true;
}
});
/* Envoyer fichier */
byte[] bytes = System.IO.File.ReadAllBytes(fileName);
byte[] fileNameString = Encoding.ASCII.GetBytes(Path.GetFileName(Path.Combine(fileName)));
Packet packet = new Packet(0, 0, false, false, fileNameString.Length, fileNameString);
sender.Send(packet.BuildPacket());
while (!CommunicationBase.Handshake)
{
}
Submission submission = new Submission();
submission.submit(bytes, sender);
/*UdpUser sender = UdpUser.ConnectTo(received.Sender.Address.ToString(), received.Sender.Port);
byte[] bytes = System.IO.File.ReadAllBytes(System.Text.Encoding.UTF8.GetString(received.packet.DATA));
Submission submission = new Submission();
submission.submit(bytes, sender);*/
}
//server.Reply(new Packet(0, received.packet.SequenceNumber, false, true, 0, new byte[0]).BuildPacket(), received.Sender);
Console.WriteLine(received.Message);
if (received.Message == "quit")
break;
}
});
while (true)
{
}
}
public void start()
{
int choiceTask;
bool parsed;
do
{
Console.WriteLine("\nQue souhaitez-vous faire?\n1) Envoyer un fichier\n2) Recevoir un fichier");
parsed = Int32.TryParse(Console.ReadLine(), out choiceTask);
} while (!parsed || (choiceTask != 1 && choiceTask != 2));
string fileName;
Console.WriteLine("\nEntrez le nom du fichier à traiter");
fileName = Console.ReadLine();
if (choiceTask == 1)
{
UdpUser socket = UdpUser.ConnectTo(Credentials.IPAddress, 32123);
byte[] fileNameString = Encoding.ASCII.GetBytes(Path.GetFileName(Path.Combine(fileName)));
//wait for reply messages from server and send them to console
Task.Factory.StartNew(async () =>
{
var received = await socket.Receive();
if (received.packet.AckNumber == 0)
{
socket = UdpUser.ConnectTo(Credentials.IPAddress, BitConverter.ToInt32(received.packet.DATA, 0));
CommunicationBase.Handshake = true;
}
});
/* On vérifie si le fichier existe. Si non, on redemande un nom de fichier existant à l'infini */
while (!File.Exists(Path.Combine(fileName)))
{
Console.WriteLine("\nFichier inexistant.\nEntrez le nom du fichier à traiter");
fileName = Console.ReadLine();
};
/* Envoyer fichier */
byte[] bytes = System.IO.File.ReadAllBytes(fileName);
Submission submission = new Submission();
Packet packet = new Packet(0, 0, false, false, fileNameString.Length, fileNameString);
socket.Send(packet.BuildPacket());
while (!CommunicationBase.Handshake)
{
}
submission.submit(bytes, socket);
}
else
{
UdpListener receiver = new UdpListener();
bool endReception = false;
byte[] fileNameString = Encoding.ASCII.GetBytes(fileName);
Packet packet = new Packet(0, 0, false, true, fileNameString.Length, fileNameString);
receiver.Send(packet.BuildPacket(), Credentials.IPAddress, 32123);
Task.Factory.StartNew(async () =>
{
Received received = await receiver.Receive();
if (received.packet.SOR == false)
{
receiver.Reply(new Packet(0, received.packet.SequenceNumber, false, false, 0, new byte[0]).BuildPacket(), received.Sender);
Reception reception = new Reception();
endReception = reception.receive(receiver, System.Text.Encoding.UTF8.GetString(received.packet.DATA), received.packet.DataLength);
}
});
while (!endReception)
{
}
}
}