/// <summary>
/// SocketReceive
/// </summary>
/// <param name="ar"></param>
private void SocketReceive(IAsyncResult ar)
{
SocketState state = (SocketState)ar.AsyncState;
try
{
int count = state.Socket.EndReceive(ar);
if (count > 0)
{
state.Data.AddRange(state.Buffer, count);
if (MllpPacket.IsValidMllpPacket(state.Data))
{
try
{
if (AckNackReceived != null)
{
MllpPacket mllp = new MllpPacket(state.Data.ToArray());
RaiseAckNackReceived(state.HL7Message, mllp.HL7Message);
}
}
catch { }
state.Socket.Close();
return;
}
}
state.Socket.BeginReceive(state.Buffer, 0, SocketState.BufferSize, SocketFlags.None, SocketReceive, state);
}
catch (Exception ex)
{
RaiseErrorEvent(ex, state.HL7Message);
state.Socket.Close();
}
}
/// <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>
/// SocketConnect
/// </summary>
/// <param name="ar"></param>
private void SocketConnect(IAsyncResult ar)
{
SocketState state = (SocketState)ar.AsyncState;
try
{
state.Socket.EndConnect(ar);
if (state.Socket.Connected)
{
MllpPacket mllpPacket = new MllpPacket(state.HL7Message);
state.Socket.BeginSend(mllpPacket, 0, mllpPacket.Size, SocketFlags.None, SocketSend, state);
}
else
throw new SocketException();
}
catch (Exception ex)
{
RaiseErrorEvent(ex, state.HL7Message);
}
}