public override void Thread()
{
FileStream fs;
int nOctetsLus = 0, nTimeOuts = 0, nErreurACK = 0;
try
{
if (File.Exists(FullPath))
{
Output.Text("File already exist");
SendError(CodeErreur.FileExisting, "File already exists");
}
else
{
fs = File.Open(FullPath, FileMode.CreateNew, FileAccess.Write, FileShare.Write);
m_tamponEnvoi[0] = (byte)((ushort)CodeOP.ACK >> 8);
m_tamponEnvoi[1] = (byte)((ushort)CodeOP.ACK & 0xFF);
m_tamponEnvoi[2] = (byte)(m_noBloc >> 8);
m_tamponEnvoi[3] = (byte)(m_noBloc & 0xFF);
m_socket.SendTo(m_tamponEnvoi, 4, SocketFlags.None, m_PointDistant);
do
{
do
{
if (m_lire = !m_socket.Poll(5000000, SelectMode.SelectRead))
{
nTimeOuts++; //TODO réenvoyer trame
}
else
{
nOctetsLus = m_socket.ReceiveFrom(m_tamponReception, ref m_PointDistant);
if (!Receive(m_tamponReception))
{
m_lire = false;
nErreurACK++;
}
else
{
m_lire = true;
fs.Write(m_tamponReception, 4, nOctetsLus - 4);
Send();
m_socket.SendTo(m_tamponEnvoi, 4, SocketFlags.None, m_PointDistant);
}
}
}while (m_lire == false && nTimeOuts < 10 && nErreurACK < 3);
}while (nOctetsLus == 516 && nTimeOuts < 10 && nErreurACK < 3);
Output.Text($" WRQ closed from IP: {((IPEndPoint)PointDistant).Address} Port: {((IPEndPoint)PointDistant).Port} ---> {m_strFichier}");
fs.Close();
m_socket.Close();
}
}
catch (SocketException se)
{
Output.Text(se.Message);
}
}
public void Listen()
{
EndPoint PointLocal = new IPEndPoint(0, 69);
EndPoint PointDistant = new IPEndPoint(0, 0);
try
{
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.Bind(PointLocal);
byte[] bTamponReception = new byte[516];
while (!m_fin)
{
if (socket.Available > 0)
{
socket.ReceiveFrom(bTamponReception, ref PointDistant);
switch (ValiderTrame(bTamponReception))
{
case 1:
//créer thread rrq
Output.Text($"Request RRQ received from IP: {((IPEndPoint)PointDistant).Address} Port: {((IPEndPoint)PointDistant).Port} ---> {FindFile(bTamponReception)}");
TFTP rrq = new RRQ
{
PointDistant = PointDistant,
StrFichier = FindFile(bTamponReception)
};
Thread threadRRQ = new Thread(new ThreadStart(rrq.Thread));
threadRRQ.Start();
break;
case 2:
//créer thread wrq
Output.Text($"Request WRQ received from IP: {((IPEndPoint)PointDistant).Address} Port: {((IPEndPoint)PointDistant).Port} ---> {FindFile(bTamponReception)}");
TFTP wrq = new WRQ
{
PointDistant = PointDistant,
StrFichier = FindFile(bTamponReception)
};
Thread threadWRQ = new Thread(new ThreadStart(wrq.Thread));
threadWRQ.Start();
break;
case -1:
Output.Text($"Request not identified received from IP: {((IPEndPoint)PointDistant).Address} Port: {((IPEndPoint)PointDistant).Port}");
break;
}
}
}
socket.Close();
}
catch (SocketException se)
{
Output.Text(se.Message);
}
}
