void packetReceive()
{
byte[] data = new byte[65535]; // max udp size datagram
int recv = 0;
bool foundchannel = false;
bool timedout = false;
bool searchforward = Ethernet.searchForward(IPstart, IPstop);
uint progressfull = Ethernet.calculateNumOfIpAddr(IPstart, IPstop);
bool stopcondition = false;
byte[] oct = IPstart.GetAddressBytes();
multiep = new IPEndPoint(new IPAddress(oct), Port);
EndPoint ep = (EndPoint)multiep;
IPEndPoint iep = new IPEndPoint(IPAddress.Parse(localhost), Port);
int i = 0;
int dir, tst;
byte str;
if (searchforward)
{
dir = 1;
tst = 256;
str = (byte)0;
}
else
{
dir = -1;
tst = -1;
str = (byte)255;
}
while (true)
{
i++;
Thread.Sleep(300); // 300 ms between requests
foundchannel = false;
sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
try
{
sock.Bind(iep);
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.AddressAlreadyInUse)
{
break;
}
}
sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, Timeout);
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, IPAddress.Parse(localhost).GetAddressBytes());
try
{
// Must be valid multicast address, else exception 10049
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(new IPAddress(oct), IPAddress.Parse(localhost)));
}
catch (SocketException) { break; }
CurrentIP_label.Invoke(new UpdateTextCallback(UpdateipLabel), curip.ToString());
FoundIP_label.Invoke(new UpdateTextCallback(UpdatefoundLabel), found.ToString());
try
{
recv = sock.ReceiveFrom(data, ref ep);
}
catch (SocketException ex1)
{
if (ex1.SocketErrorCode == SocketError.TimedOut)
{
timedout = true;
recv = 0;
foundchannel = false;
}
}
if (recv > 0)
{
foundchannel = true;
found++;
}//We found a channel
if (!timedout)
{
Thread.Sleep(300); // we are receiving for 300 ms
}
string tvgName = "Chan " + lastchan;
string tvglogo = "New Logo";
string groupTitle = "New Group";
string Name = lastchan.ToString();
string udp = "udp://@" + curip.ToString() + ":" + Port;
TVChannel tvc =
new TVChannel(
_tvgName: tvgName.Trim(),
_tvglogo: tvglogo.Trim(),
_groupTitle: groupTitle.Trim(),
_udp: udp.Trim(),
_Name: Name.Trim()
);
bool isTVC = false;
for (int count = 0; count < FindCH.Count; count++)
{
if (FindCH[count].Equals(tvc))
{
isTVC = true;
break;
}
}
//Check if entry allready exists
if (foundchannel && !isTVC)
{
CurrentIP_label.Invoke(new RefreshDatatableViewCallback(TableAdd), tvc);
newchan++;
lastchan++;
CurrentIP_label.Invoke(new UpdateTextCallback(UpdateipLabel), curip.ToString());
FoundIP_label.Invoke(new UpdateTextCallback(UpdatefoundLabel), found.ToString());
}
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.DropMembership, new MulticastOption(new IPAddress(oct), IPAddress.Parse(localhost)));
if (stopcondition)
{
break;
}
int test1 = oct[3] + dir;
if (test1 == tst)
{
oct[3] = str;
int test2 = oct[2] + dir;
if (test2 == tst)
{
oct[2] = str;
int test3 = oct[1] + dir;
if (test3 == tst)
{
oct[1] = str;
int test4 = oct[0] + dir;
if (test4 == tst)
{
oct[0] = str;
}
}
else
{
oct[1] = (byte)(oct[1] + dir);
}
}
else
{
oct[2] = (byte)(oct[2] + dir);
}
}
else
{
oct[3] = (byte)(oct[3] + dir);
}
curip = new IPAddress(oct);
progress_Bar.Invoke(new ProgressbarCallback(UpdateprogressBar), (int)Math.Round(100 * (float)i / (float)progressfull));
if (curip.Equals(IPstop))
{
stopcondition = true;
}
sock.Close();
}
sock.Close();
CurrentIP_label.Invoke(new UpdateTextCallback(UpdateipLabel), curip.ToString());
FoundIP_label.Invoke(new UpdateTextCallback(UpdatefoundLabel), found.ToString());
start_bt.Invoke(new UpdateButtonsCallback(UpdatestartButton));
stop_bt.Invoke(new UpdateButtonsCallback(UpdatestopButton));
progress_Bar.Invoke(new ProgressbarCallback(UpdateprogressBar), 100);
//Abort thread
ThreadReceiver.Abort();
}
/// <summary>Отмена сканирования</summary>
public void stopScann()
{
progress_Bar.Value = 100;
ThreadReceiver.Abort();
sock.Close();
}