/// <summary>
/// Send: sends an HL7 message to a host and returns the ACK/NACK response (if required).
/// </summary>
/// <param name="data"></param>
/// <returns>byte[]</returns>
public HL7Message Send(HL7Message hl7)
{
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
s.Connect(ep);
if (s.Connected)
{
MllpPacket mllp = new MllpPacket(hl7);
int count = s.Send((byte[])mllp);
if (count > 0 && ackNackRequired)
{
SocketState state = new SocketState();
s.Receive(state.Buffer, 0, SocketState.BufferSize, SocketFlags.None);
if (MllpPacket.IsValidMllpPacket(state.Buffer.ToList()))
return new MllpPacket(state.Buffer).HL7Message;
}
}
}
finally
{
s.Close();
}
return null;
}
/// <summary>
/// AcceptConnection
/// </summary>
/// <param name="ar"></param>
private void AcceptConnection(IAsyncResult ar)
{
try
{
Socket s1 = (Socket)ar.AsyncState;
Socket s2 = s1.EndAccept(ar);
SocketState state = new SocketState() { Socket = s2 };
s2.BeginReceive(state.Buffer, 0, SocketState.BufferSize, SocketFlags.None, SocketReceive, state);
s1.BeginAccept(AcceptConnection, s1);
}
catch (ObjectDisposedException)
{
// eat it
}
catch (Exception ex)
{
RaiseErrorEvent(ex);
}
}