public List<MFDevice> EnumPorts(TransportType type)
{
/*
We need to create two socket for discovery Udp multicast
socket sends discovery message
socket2 receive messages
*/
if (type != TransportType.Udp) //sanity check
type = TransportType.Udp;
this.m_deviceList.Clear(); //start anew
try
{
foreach (IPAddress address in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
{
if (address.AddressFamily == AddressFamily.InterNetwork)
{
int num = 0; // num of bytes return with receive socket
int index = 0; // denotes the beginning of each stream from MF modules
int iy = 0; // counts macaddress bytes
byte[] buffer = new byte[0x400]; //data buffer
byte[] macarr = new byte[0x06]; //mac address from data buffer
Socket socket = null; //tx socket on host
Socket socket2 = null;//rx socket on host
IPEndPoint localEP = new IPEndPoint(address, 0);
EndPoint remoteEP = new IPEndPoint(IPAddress.Any, this.m_DiscoveryMulticastPort);
IPEndPoint point3 = new IPEndPoint(address, this.m_DiscoveryMulticastPort);
IPEndPoint point4 = new IPEndPoint(this.m_DiscoveryMulticastAddress, this.m_DiscoveryMulticastPort);
try
{
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket2 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket2.Bind(point3);
socket2.ReceiveTimeout = 0x3e8;
socket2.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(this.m_DiscoveryMulticastAddressRecv, address));
socket.Bind(localEP);
socket.MulticastLoopback = false;
socket.Ttl = 1;
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 0x40);
socket.SendTo(Encoding.ASCII.GetBytes(this.m_DiscoveryMulticastToken), SocketFlags.None, point4);
while (0 < (num = socket2.ReceiveFrom(buffer, index, buffer.Length - index, SocketFlags.None, ref remoteEP)))
{
MFDevice mfDev = new MFDevice();
mfDev.setPointRemoteIP(((IPEndPoint)remoteEP).Address.ToString()); //add Remote IP
mfDev.setPointRemotePort(((IPEndPoint)remoteEP).Port); //add Remote Port
mfDev.setPointRemoteAdrFamily(((IPEndPoint)remoteEP).AddressFamily.ToString()); //add Remote Type
//get/add mac address
iy = 0;
while (iy < 6)
{
macarr[iy] = buffer[index + 8 + iy];
iy++;
}
mfDev.GetMacAddr(macarr); //add Remote Mac Address
m_deviceList.Add(mfDev); //add object to Factory
index += num; // new ofset- remote dev answer simultaniously to multicast
socket2.ReceiveTimeout = 200;//timeout of 200ms
}
socket2.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.DropMembership, new MulticastOption(this.m_DiscoveryMulticastAddressRecv));
}
catch (SocketException)
{
}
finally
{
if (socket2 != null)
{
socket2.Close();
socket2 = null;
}
if (socket != null)
{
socket.Close();
socket = null;
}
}
}
}
}
catch (Exception)
{
}
return m_deviceList;
}