public void Class1SendO2T(SequencedAddressItem Item)
{
if (UdpListener != null)
{
UdpListener.Send(Item, epUdp);
}
}
// Coming from an udp class1 device, with a previous ForwardOpen action
public void On_ItemMessageReceived(object sender, byte[] packet, SequencedAddressItem ItemPacket, int offset, int msg_length, IPEndPoint remote_address)
{
if (ItemPacket.ConnectionId != T2O_ConnectionId)
{
return;
}
if ((msg_length - offset) == 0)
{
return;
}
RawData = new byte[msg_length - offset];
Array.Copy(packet, offset, RawData, 0, RawData.Length);
if (DecodedMembers != null)
{
int Idx = 0;
try
{
DecodedMembers.DecodeAttr(Id, ref Idx, RawData);
}
catch { }
}
if (T2OEvent != null)
{
T2OEvent(this);
}
}
private void OnReceiveData(IAsyncResult asyncResult)
{
System.Net.Sockets.UdpClient conn = (System.Net.Sockets.UdpClient)asyncResult.AsyncState;
try
{
System.Net.IPEndPoint ep = new IPEndPoint(System.Net.IPAddress.Any, 0);
byte[] local_buffer;
int rx = 0;
try
{
local_buffer = conn.EndReceive(asyncResult, ref ep);
rx = local_buffer.Length;
}
catch (Exception) // ICMP port unreachable
{
//restart data receive
conn.BeginReceive(OnReceiveData, conn);
return;
}
if (rx < 14) // Sure it's too small
{
//restart data receive
conn.BeginReceive(OnReceiveData, conn);
return;
}
try
{
int Offset = 0;
Encapsulation_Packet Encapacket = new Encapsulation_Packet(local_buffer, ref Offset, rx);
//verify message
if (Encapacket.IsOK)
{
if (EncapMessageReceived != null)
{
EncapMessageReceived(this, local_buffer, Encapacket, Offset, rx, ep);
}
}
else
{
SequencedAddressItem Itempacket = new SequencedAddressItem(local_buffer, ref Offset, rx);
if (Itempacket.IsOK && (ItemMessageReceived != null))
{
ItemMessageReceived(this, local_buffer, Itempacket, Offset, rx, ep);
}
}
}
catch (Exception ex)
{
Trace.TraceError("Exception in udp recieve: " + ex.Message);
}
finally
{
//restart data receive
conn.BeginReceive(OnReceiveData, conn);
}
}
catch (Exception ex)
{
//restart data receive
if (conn.Client != null)
{
Trace.TraceError("Exception in Ip OnRecieveData: " + ex.Message);
conn.BeginReceive(OnReceiveData, conn);
}
}
}
public void Send(SequencedAddressItem Packet, IPEndPoint ep)
{
byte[] b = Packet.toByteArray();
m_exclusive_conn.Send(b, b.Length, ep);
}
