/**
* Methode networkWrite (ecrire_vers_reseau) qui lit le fichier s_lec.txt
* jusqu'a une ligne qui contiens la String N_DISCONNECT ou jusqu'a ce que
* la fin du fichier soit atteint.
*
* Si la ligne lu contiens N_CONNECT, N_DATA ou N_DISCONNECT un pacquet (Npdu)
* est créer et ajouté a la file transport2Network
*/
public void networkWrite()
{
string lineRead;
Npdu networkNNpdu;
string[] settings;
bool valid;
end = false;
while (!end && !disconnect)
{
if ((lineRead = reader.ReadLine()) != null)
{
networkNNpdu = new Npdu();
try
{
valid = false;
settings = lineRead.Split(' ');
Form1._UI.write2S_lec(lineRead);
if (settings[0] == "N_CONNECT")
{
networkNNpdu.type = "N_CONNECT.req";
networkNNpdu.destAddr = settings[1];
networkNNpdu.sourceAddr = settings[2];
networkNNpdu.routeAddr = "";
valid = true;
}
else if (settings[0] == "N_DATA")
{
networkNNpdu.type = "N_DATA.req";
for (int i = 1; i < settings.Length; i++)
{
networkNNpdu.data += settings[i] + " ";
}
valid = true;
}
else if (settings[0] == "N_DISCONNECT")
{
networkNNpdu.type = "N_DISCONNECT.req";
networkNNpdu.routeAddr = settings[1];
valid = true;
disconnect = true;
}
if (valid)
{
transport2Network.Enqueue(networkNNpdu);
}
}
catch (ThreadAbortException)
{
}
}
else
{
end = true;
}
}
}
private static Npdu decapRelease(PACKET currentPacket)
{
Npdu currentNpdu = new Npdu();
currentNpdu.type = "N_DISCONNECT.ind";
currentNpdu.sourceAddr = currentPacket.sourceAddr.ToString();
currentNpdu.destAddr = currentPacket.destAddr.ToString();
currentNpdu.connection = currentPacket.connectionNumber.ToString();
BitArray target = new BitArray(new byte[] { currentPacket.target });
if (target[0])
{
currentNpdu.target = "Closed by Client";
}
else if (target[1])
{
currentNpdu.target = "Closed by Provider";
}
else
{
currentNpdu.target = "Unknown";
}
return(currentNpdu);
}
private static Npdu decapData(PACKET currentPacket)
{
Npdu currentNpdu = new Npdu();
currentNpdu.type = "N_DATA.ind";
currentNpdu.connection = currentPacket.connectionNumber.ToString();
BitArray type = new BitArray(new byte[] { currentPacket.packetType });
BitArray prps = new BitArray(3);
prps.Set(0, type.Get(5));
prps.Set(1, type.Get(6));
prps.Set(2, type.Get(7));
int[] num = new int[1];
prps.CopyTo(num, 0);
currentNpdu.pr = num[0];
prps.Set(0, type.Get(1));
prps.Set(1, type.Get(2));
prps.Set(2, type.Get(3));
prps.CopyTo(num, 0);
currentNpdu.ps = num[0];
if (currentPacket.dataArray != null)
{
currentNpdu.data = GetString(currentPacket.dataArray);
}
currentNpdu.flag = type[4];
return(currentNpdu);
}
private static Npdu decapAcknowledge(PACKET currentPacket)
{
Npdu currentNpdu = new Npdu();
BitArray type = new BitArray(new byte[] { currentPacket.target });
if (type[0])
{
if (type[3])
{
currentNpdu.type = "NACK";
}
else
{
currentNpdu.type = "ACK";
}
BitArray pr = new BitArray(3);
pr.Set(0, type.Get(5));
pr.Set(1, type.Get(6));
pr.Set(2, type.Get(7));
int[] next = new int[1];
pr.CopyTo(next, 0);
currentNpdu.pr = next[0];
currentNpdu.connection = currentPacket.connectionNumber.ToString();
}
else
{
currentNpdu.type = "WrongPacketFormat";
}
return(currentNpdu);
}
private static Npdu decapRequest(PACKET currentPacket)
{
Npdu currentNpdu = new Npdu();
currentNpdu.type = "N_CONNECT.ind";
currentNpdu.sourceAddr = currentPacket.sourceAddr.ToString();
currentNpdu.destAddr = currentPacket.destAddr.ToString();
currentNpdu.connection = currentPacket.connectionNumber.ToString();
return(currentNpdu);
}
public static Npdu decapPacket(PACKET currentPacket)
{
Npdu _4Transport = new Npdu();
BitArray type = new BitArray(new byte[] { currentPacket.packetType });
BitArray connectionInit, connectionEstablished, releasing;
bool[] boolArray = new bool[8] {
true, true, false, true, false, false, false, false
};
connectionInit = new BitArray(boolArray);
boolArray = new bool[8] {
true, true, true, true, false, false, false, false
};
connectionEstablished = new BitArray(boolArray);
boolArray = new bool[8] {
true, true, false, false, true, false, false, false
};
releasing = new BitArray(boolArray);
if (currentPacket.packetType == 255)
{
return(decapAcknowledge(currentPacket));
}
else if (isEqualBitArrays(type, releasing))
{
return(decapRelease(currentPacket));
}
else if (isEqualBitArrays(type, connectionEstablished))
{
return(decapConnectionEstablished(currentPacket));
}
else if (isEqualBitArrays(type, connectionInit))
{
return(decapRequest(currentPacket));
}
else if (!type[0])
{
return(decapData(currentPacket));
}
_4Transport.type = "WrongPacketFormat";
return(_4Transport);
}
public void transportWrite()
{
while (true)
{
try
{
if (!disconnected)
{
if (packetProcessing2Network.Count > 0)
{
if (packetProcessing2Network.Peek().GetType() == typeof(byte[]))
{
string msg = "";
byte[] received = (byte[])packetProcessing2Network.Dequeue();
PACKET receivedPacket = Packet.decapBytes(received);
Npdu _4Transport = Packet.decapPacket(receivedPacket);
switch (_4Transport.type)
{
case "WrongPacketFormat":
msg = "Wrong Packet Format";
break;
case "release":
msg = "released packet: " + receivedPacket.packetType.ToString();
rejected = true;
break;
case "N_DISCONNECT.ind":
msg = "N_DISCONNECT " + _4Transport.target;
network2Transport.Enqueue(_4Transport);
accepted = true;
disconnected = true;
break;
case "N_CONNECT.ind":
msg = "N_CONNECT dest Address :" + _4Transport.destAddr + " source Address: " + _4Transport.sourceAddr;
network2Transport.Enqueue(_4Transport);
accepted = true;
break;
case "N_DATA.ind":
msg = "N_DATA transferring network data";
receivedData += _4Transport.data;
if (!_4Transport.flag)
{
_4Transport.data = receivedData;
network2Transport.Enqueue(_4Transport);
}
break;
default:
break;
}
write2Transport.WriteLine(msg);
Form1._UI.write2L_ecr(msg);
}
}
}
}
catch (ThreadAbortException)
{
}
}
}
public void transportRead()
{
while (true)
{
try
{
if (!disconnected)
{
if (transport2Network.Count > 0)
{
if (transport2Network.Peek().GetType() == typeof(Npdu))
{
Npdu transportNpdu = (Npdu)transport2Network.Dequeue();
Npdu npdu2Transport;
PACKET packet4Processing;
string msg;
if (transportNpdu.type != "N_CONNECT.req" && !connected)
{
}
else
{
if (transportNpdu.type == "N_CONNECT.req")
{
int intSource = int.Parse(transportNpdu.sourceAddr);
int intDest = int.Parse(transportNpdu.destAddr);
sourceAddr[0] = (byte)intSource;
destAddr[0] = (byte)intDest;
if (intSource > 249 || intDest > 249)
{
transportNpdu.routeAddr = " Error, not found !";
}
else
{
if (intSource >= 0 && intSource <= 99)
{
if (intDest >= 0 && intDest <= 99)
{
transportNpdu.routeAddr = "" + intDest;
}
else if (intDest >= 100 && intDest <= 199)
{
transportNpdu.routeAddr = "" + 255;
}
else if (intDest >= 200 && intDest <= 249)
{
transportNpdu.routeAddr = "" + 254;
}
}
else if (intSource >= 100 && intSource <= 199)
{
if (intDest >= 0 && intDest <= 99)
{
transportNpdu.routeAddr = "" + 250;
}
else if (intDest >= 100 && intDest <= 199)
{
transportNpdu.routeAddr = "" + intDest;
}
else if (intDest >= 200 && intDest <= 249)
{
transportNpdu.routeAddr = "" + 253;
}
}
else if (intSource >= 200 && intSource <= 249)
{
if (intDest >= 0 && intDest <= 99)
{
transportNpdu.routeAddr = "" + 251;
}
else if (intDest >= 100 && intDest <= 199)
{
transportNpdu.routeAddr = "" + 252;
}
else if (intDest >= 200 && intDest <= 249)
{
transportNpdu.routeAddr = "" + intDest;
}
}
}
msg = "N_CONNECT " + transportNpdu.destAddr + " " + transportNpdu.sourceAddr + " route:" + transportNpdu.routeAddr;
writeFromTransport.WriteLine(msg);
Form1._UI.write2L_lec(msg);
if (sourceAddr[0] % 27 == 0 || int.Parse(transportNpdu.sourceAddr) > 249 || int.Parse(transportNpdu.destAddr) > 249)
{
disconnected = true;
connected = false;
npdu2Transport = new Npdu();
npdu2Transport.type = "N_DISCONNECT.ind";
npdu2Transport.target = "00000010";
npdu2Transport.connection = "255";
network2Transport.Enqueue(npdu2Transport);
}
else
{
connected = true;
npdu2Transport = new Npdu();
npdu2Transport.type = "N_CONNECT.conf";
npdu2Transport.sourceAddr = sourceAddr[0].ToString();
npdu2Transport.destAddr = destAddr[0].ToString();
npdu2Transport.connection = outputNo[0].ToString();
network2Transport.Enqueue(npdu2Transport);
packet4Processing = Packet.encapsulateRequest(outputNo[0], sourceAddr[0], destAddr[0]);
byte[] sending = Packet.encapsulateBytes(packet4Processing, "request");
sentCount = 0;
rejected = false;
expired = true;
accepted = false;
timer.Start();
while (!accepted && sentCount < 2)
{
if (expired || rejected)
{
network2PacketProcessing.Enqueue(sending);
expired = false;
rejected = false;
sentCount++;
}
}
timer.Stop();
}
}
else if (transportNpdu.type == "N_DATA.req")
{
msg = "N_DATA " + transportNpdu.data;
writeFromTransport.WriteLine(msg);
Form1._UI.write2L_lec(msg);
PACKET[] packets4Processing = Packet.encapsulateFullData(transportNpdu.data, outputNo[0], pr);
foreach (PACKET packet in packets4Processing)
{
byte[] sending = Packet.encapsulateDataBytes(packet);
sentCount = 0;
rejected = false;
expired = true;
accepted = false;
timer.Start();
while (!accepted && sentCount < 2)
{
if (expired || rejected)
{
network2PacketProcessing.Enqueue(sending);
expired = false;
rejected = false;
sentCount++;
}
}
timer.Stop();
}
}
else if (transportNpdu.type == "N_DISCONNECT.req")
{
msg = "N_DISCONNECT " + transportNpdu.routeAddr;
writeFromTransport.WriteLine(msg);
Form1._UI.write2L_lec(msg);
npdu2Transport = new Npdu();
npdu2Transport.type = "N_DISCONNECT.ind";
packet4Processing = Packet.encapsulateRelease(outputNo[0], sourceAddr[0], destAddr[0], true);
string packetType = "release";
byte[] sending = Packet.encapsulateBytes(packet4Processing, packetType);
sentCount = 0;
rejected = false;
expired = true;
accepted = false;
timer.Start();
while (!accepted && sentCount < 2)
{
if (expired || rejected)
{
network2PacketProcessing.Enqueue(sending);
expired = false;
rejected = false;
sentCount++;
}
}
timer.Stop();
}
}
}
}
}
}
catch (ThreadAbortException) { }
}
}
/**
* Methode networkRead (lire_de_reseau) qui verifie si la file network2Transport
* contiens un Npdu a lire, si tel est le cas le type du Npdu est verifié et un
* traitement est effectué selon le type trouvé.
*/
public void networkRead()
{
while (!end)
{
try
{
if (network2Transport.Count > 0)
{
if (network2Transport.Peek().GetType() == typeof(Npdu))
{
Npdu Npdu4Network = (Npdu)network2Transport.Dequeue();
if (Npdu4Network.type == "N_CONNECT.ind")
{
if (connected.Contains(Npdu4Network.connection))
{
msg = "connection: " + Npdu4Network.connection + " dest Address: " + Npdu4Network.destAddr + " source Address: " + Npdu4Network.sourceAddr;
writer.WriteLine(msg);
Form1._UI.write2S_ecr(msg);
}
}
else if (Npdu4Network.type == "N_CONNECT.conf")
{
msg = "connection: " + Npdu4Network.connection + " Connection established ";
writer.WriteLine(msg);
Form1._UI.write2S_ecr(msg);
connected.Add(Npdu4Network.connection);
}
else if (Npdu4Network.type == "N_DATA.ind")
{
if (connected.Contains(Npdu4Network.connection))
{
msg = Npdu4Network.data;
writer.WriteLine(msg);
Form1._UI.write2S_ecr(msg);
}
}
else if (Npdu4Network.type == "N_DISCONNECT.ind")
{
if (connected.Contains(Npdu4Network.connection))
{
connected.Remove(Npdu4Network.connection);
msg = "connection: " + Npdu4Network.connection + " " + Npdu4Network.routeAddr + " disconnected " + Npdu4Network.target;
writer.WriteLine(msg);
Form1._UI.write2S_ecr(msg);
Form1._UI.closeThreads();
}
else if (Npdu4Network.connection.Equals("255"))
{
Form1._UI.write2S_ecr("connection: declined by Network! ");
Form1._UI.closeThreads();
}
}
}
}
}
catch (ThreadAbortException)
{
}
}
}
