/// <summary>
/// Message received event.
/// </summary>
public TCPIPClient()
{
state = new AsynReadState(BUFFER_SIZE);
}
public TCPIPServer()
{
state = new AsynReadState(BUFFER_SIZE);
}
/// <summary>
/// Data process
/// </summary>
/// <param name="ar"></param>
private void OnDataRead(IAsyncResult ar)
{
int offset = 0;
AsynReadState ss = (AsynReadState)ar.AsyncState;
//Detect client disconnection. then start anther acception
if (ss.data[0] == 0)
{
server.BeginAcceptTcpClient(new AsyncCallback(DoAcceptTCPClientCallBack), server);
return;
}
try
{
REPEAT: //if multiple messages exist in the result. repeat the process
if (new_message) //new_message is a flag to indicate if the data is part of unfinished message
{
//Calculate message type, version, length and id
int header = (ss.data[offset] << 8) + ss.data[offset + 1];
msg_type = (Int16)(header & 0x03FF);
msg_ver = (Int16)((header >> 10) & 0x07);
msg_len = (ss.data[offset + 2] << 24) + (ss.data[offset + 3] << 16) + (ss.data[offset + 4] << 8) + ss.data[offset + 5];
msg_id = (ss.data[offset + 6] << 24) + (ss.data[offset + 7] << 16) + (ss.data[offset + 8] << 8) + ss.data[offset + 9];
//if the message length is 0. the rest of byte array are empty. restart non-block reading
if (msg_len == 0)
{
if (ns != null)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
ns.BeginRead(state.data, 0, state.data.Length, new AsyncCallback(OnDataRead), state);
}
catch { }
return;
}
else
return;
}
msg_data = new byte[msg_len];
//if message length greater than the calcualted message length. copy message and trigger message event
if (ss.data.Length >= msg_len)
{
Array.Copy(ss.data, offset, msg_data, 0, msg_len);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len;
msg_len = 0;
goto REPEAT;
}
else//If the received data is shorter than the message length, keep reading for the next data
{
new_message = false;
Array.Copy(ss.data, 0, msg_data, 0, ss.data.Length);
msg_cursor += ss.data.Length;
}
}
else
{
//if data length larger than needed data for a complete message,
//copy data into existing message and triggered message event
if (ss.data.Length >= msg_len - msg_cursor)
{
Array.Copy(ss.data, 0, msg_data, msg_cursor, msg_len - msg_cursor);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len - msg_cursor;
msg_len = 0;
msg_cursor = 0;
new_message = true;
goto REPEAT;
}
else //keep reading
{
new_message = false;
Array.Copy(ss.data, 0, msg_data, msg_cursor, ss.data.Length);
msg_cursor += ss.data.Length;
}
}
//if ns !=null, do next asyn-read, to ensure that read
if (ns != null && ns.CanRead)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
ns.BeginRead(state.data, 0, state.data.Length, new AsyncCallback(OnDataRead), state);
}
catch { }
}
}
catch
{
}
}
/// <summary>
/// Asyn read result process
/// </summary>
/// <param name="ar"></param>
private void OnDataRead(IAsyncResult ar)
{
int offset = 0; //used to keep the start position of a LLRP message in
//byte array returned from the read
AsynReadState ss = (AsynReadState)ar.AsyncState; //used to keep data
lock (syn_msg)
{
try
{
REPEAT:
if (new_message) //new_message is a flag to indicate if the data is part of unfinished message
{
msg_cursor = 0;
int reserved_date_len = ss.data.Length - offset;
if (reserved_date_len > 10)
{
//Calculate message type, version, length and id
int header = (ss.data[offset] << 8) + ss.data[offset + 1];
try
{
msg_type = (Int16)(header & 0x03FF);
msg_ver = (Int16)((header >> 10) & 0x07);
msg_len = (ss.data[offset + 2] << 24) + (ss.data[offset + 3] << 16) + (ss.data[offset + 4] << 8) + ss.data[offset + 5];
msg_id = (ss.data[offset + 6] << 24) + (ss.data[offset + 7] << 16) + (ss.data[offset + 8] << 8) + ss.data[offset + 9];
}
catch
{
msg_len = 0;
}
if (msg_len > 20000)
{
int i = 0;
}
//if data length larger than needed data for a complete message,
//copy data into existing message and triggered message event
if (msg_len > 0 && msg_ver == 1)
{
msg_data = new byte[msg_len];
//if message length greater than the calcualted message length. copy message and trigger message event
if (ss.data.Length >= (offset + msg_len))
{
Array.Copy(ss.data, offset, msg_data, 0, msg_len);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len;
new_message = true;
goto REPEAT;
}
else//If the received data is shorter than the message length, keep reading for the next data
{
new_message = false;
Array.Copy(ss.data, offset, msg_data, 0, ss.data.Length - offset);
msg_cursor = ss.data.Length - offset;
}
}
}
else
{
new_message = true;
//if ns !=null, do next asyn-read, to ensure that read
if (ns != null && ns.CanRead)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
Array.Copy(ss.data, offset, state.data, 0, reserved_date_len);
if (!trying_to_close) ns.BeginRead(state.data, reserved_date_len, BUFFER_SIZE-reserved_date_len, new AsyncCallback(OnDataRead), state);
}
catch { }
}
return;
}
}
else
{
//if data length larger than needed data for a complete message,
//copy data into existing message and triggered message event
if (ss.data.Length >= msg_len - msg_cursor)
{
Array.Copy(ss.data, 0, msg_data, msg_cursor, msg_len - msg_cursor);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len - msg_cursor;
new_message = true;
goto REPEAT;
}
else //keep reading
{
new_message = false;
Array.Copy(ss.data, 0, msg_data, msg_cursor, ss.data.Length);
msg_cursor += ss.data.Length;
}
}
//if ns !=null, do next asyn-read, to ensure that read
if (ns != null && ns.CanRead)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
if (!trying_to_close) ns.BeginRead(state.data, 0, BUFFER_SIZE, new AsyncCallback(OnDataRead), state);
}
catch { }
}
}
catch
{
}
}
}
/// <summary>
/// Message received event.
/// </summary>
public TCPIPClient()
{
state = new AsynReadState(BUFFER_SIZE);
}
/// <summary>
/// Data process
/// </summary>
/// <param name="ar"></param>
private void OnDataRead(IAsyncResult ar)
{
int offset = 0;
AsynReadState ss = (AsynReadState)ar.AsyncState;
//Detect client disconnection. then start anther acception
if (ss.data[0] == 0)
{
server.BeginAcceptTcpClient(new AsyncCallback(DoAcceptTCPClientCallBack), server);
return;
}
try
{
REPEAT: //if multiple messages exist in the result. repeat the process
if (new_message) //new_message is a flag to indicate if the data is part of unfinished message
{
//Calculate message type, version, length and id
int header = (ss.data[offset] << 8) + ss.data[offset + 1];
msg_type = (Int16)(header & 0x03FF);
msg_ver = (Int16)((header >> 10) & 0x07);
msg_len = (ss.data[offset + 2] << 24) + (ss.data[offset + 3] << 16) + (ss.data[offset + 4] << 8) + ss.data[offset + 5];
msg_id = (ss.data[offset + 6] << 24) + (ss.data[offset + 7] << 16) + (ss.data[offset + 8] << 8) + ss.data[offset + 9];
//if the message length is 0. the rest of byte array are empty. restart non-block reading
if (msg_len == 0)
{
if (ns != null)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
ns.BeginRead(state.data, 0, state.data.Length, new AsyncCallback(OnDataRead), state);
}
catch { }
return;
}
else
{
return;
}
}
msg_data = new byte[msg_len];
//if message length greater than the calcualted message length. copy message and trigger message event
if (ss.data.Length >= msg_len)
{
Array.Copy(ss.data, offset, msg_data, 0, msg_len);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len;
msg_len = 0;
goto REPEAT;
}
else//If the received data is shorter than the message length, keep reading for the next data
{
new_message = false;
Array.Copy(ss.data, 0, msg_data, 0, ss.data.Length);
msg_cursor += ss.data.Length;
}
}
else
{
//if data length larger than needed data for a complete message,
//copy data into existing message and triggered message event
if (ss.data.Length >= msg_len - msg_cursor)
{
Array.Copy(ss.data, 0, msg_data, msg_cursor, msg_len - msg_cursor);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len - msg_cursor;
msg_len = 0;
msg_cursor = 0;
new_message = true;
goto REPEAT;
}
else //keep reading
{
new_message = false;
Array.Copy(ss.data, 0, msg_data, msg_cursor, ss.data.Length);
msg_cursor += ss.data.Length;
}
}
//if ns !=null, do next asyn-read, to ensure that read
if (ns != null && ns.CanRead)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
ns.BeginRead(state.data, 0, state.data.Length, new AsyncCallback(OnDataRead), state);
}
catch { }
}
}
catch
{
}
}
public TCPIPServer()
{
state = new AsynReadState(BUFFER_SIZE);
}
/// <summary>
/// Asyn read result process
/// </summary>
/// <param name="ar"></param>
private void OnDataRead(IAsyncResult ar)
{
int offset = 0; //used to keep the start position of a LLRP message in
//byte array returned from the read
AsynReadState ss = (AsynReadState)ar.AsyncState; //used to keep data
lock (syn_msg)
{
try
{
REPEAT:
if (new_message) //new_message is a flag to indicate if the data is part of unfinished message
{
msg_cursor = 0;
int reserved_date_len = ss.data.Length - offset;
if (reserved_date_len > 10)
{
//Calculate message type, version, length and id
int header = (ss.data[offset] << 8) + ss.data[offset + 1];
try
{
msg_type = (Int16)(header & 0x03FF);
msg_ver = (Int16)((header >> 10) & 0x07);
msg_len = (ss.data[offset + 2] << 24) + (ss.data[offset + 3] << 16) + (ss.data[offset + 4] << 8) + ss.data[offset + 5];
msg_id = (ss.data[offset + 6] << 24) + (ss.data[offset + 7] << 16) + (ss.data[offset + 8] << 8) + ss.data[offset + 9];
}
catch
{
msg_len = 0;
}
if (msg_len > 20000)
{
int i = 0;
}
//if data length larger than needed data for a complete message,
//copy data into existing message and triggered message event
if (msg_len > 0 && msg_ver == 1)
{
msg_data = new byte[msg_len];
//if message length greater than the calcualted message length. copy message and trigger message event
if (ss.data.Length >= (offset + msg_len))
{
Array.Copy(ss.data, offset, msg_data, 0, msg_len);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len;
new_message = true;
goto REPEAT;
}
else//If the received data is shorter than the message length, keep reading for the next data
{
new_message = false;
Array.Copy(ss.data, offset, msg_data, 0, ss.data.Length - offset);
msg_cursor = ss.data.Length - offset;
}
}
}
else
{
new_message = true;
//if ns !=null, do next asyn-read, to ensure that read
if (ns != null && ns.CanRead)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
Array.Copy(ss.data, offset, state.data, 0, reserved_date_len);
if (!trying_to_close)
{
ns.BeginRead(state.data, reserved_date_len, BUFFER_SIZE - reserved_date_len, new AsyncCallback(OnDataRead), state);
}
}
catch { }
}
return;
}
}
else
{
//if data length larger than needed data for a complete message,
//copy data into existing message and triggered message event
if (ss.data.Length >= msg_len - msg_cursor)
{
Array.Copy(ss.data, 0, msg_data, msg_cursor, msg_len - msg_cursor);
delegateMessageReceived msgRecv = new delegateMessageReceived(TriggerMessageEvent);
msgRecv.BeginInvoke(msg_ver, msg_type, msg_id, msg_data, null, null);
offset += msg_len - msg_cursor;
new_message = true;
goto REPEAT;
}
else //keep reading
{
new_message = false;
Array.Copy(ss.data, 0, msg_data, msg_cursor, ss.data.Length);
msg_cursor += ss.data.Length;
}
}
//if ns !=null, do next asyn-read, to ensure that read
if (ns != null && ns.CanRead)
{
try
{
ns.Flush();
state = new AsynReadState(BUFFER_SIZE);
if (!trying_to_close)
{
ns.BeginRead(state.data, 0, BUFFER_SIZE, new AsyncCallback(OnDataRead), state);
}
}
catch { }
}
}
catch
{
}
}
}