private void BeginRead(IpcPipeData pd)
{
// Asynchronously read a request from the client
bool isConnected = pd.pipe.IsConnected;
if (isConnected)
{
try {
pd.pipe.BeginRead(pd.data, 0, pd.data.Length, OnAsyncMessage, pd);
}
catch (Exception) {
isConnected = false;
}
}
if (!isConnected)
{
pd.pipe.Close();
m_callback.OnAsyncDisconnect(pd.pipe, pd.state);
lock (m_pipes) {
bool removed = m_pipes.Remove(pd.pipe);
Debug.Assert(removed);
}
}
}
private void OnAsyncMessage(IAsyncResult result)
{
// Async read from client completed
IpcPipeData pd = (IpcPipeData)result.AsyncState;
Int32 bytesRead = pd.pipe.EndRead(result);
if (bytesRead != 0)
{
m_callback.OnAsyncMessage(pd.pipe, pd.data, bytesRead, pd.state);
}
BeginRead(pd);
}
private void OnClientConnected(IAsyncResult result)
{
try
{
// Complete the client connection
NamedPipeServerStream pipe = (NamedPipeServerStream)result.AsyncState;
pipe.EndWaitForConnection(result);
// Create client pipe structure
IpcPipeData pd = new IpcPipeData();
pd.pipe = pipe;
pd.state = null;
pd.data = new Byte[SERVER_IN_BUFFER_SIZE];
// Add connection to connection list
bool running;
lock (m_pipes)
{
running = m_running;
if (running)
{
m_pipes.Add(pd.pipe, pd);
}
}
// If server is still running
if (running)
{
// Prepare for next connection
IpcServerPipeCreate();
// Alert server that client connection exists
m_callback.OnAsyncConnect(pipe, out pd.state);
// Accept messages
BeginRead(pd);
}
else
{
pipe.Close();
}
} catch (Exception ex)
{
//Exception reason: NamedPipeServerStream.close() is called when stopped the server. This causes OnClientConnected to be called. It then tries to acces a closed pipe with pipe.EndWaitForConnection
}
}
private void OnClientConnected(IAsyncResult result)
{
// Complete the client connection
NamedPipeServerStream pipe = (NamedPipeServerStream) result.AsyncState;
pipe.EndWaitForConnection(result);
// Create client pipe structure
IpcPipeData pd = new IpcPipeData();
pd.pipe = pipe;
pd.state = null;
pd.data = new Byte[SERVER_IN_BUFFER_SIZE];
// Add connection to connection list
bool running;
lock(m_pipes) {
running = m_running;
if (running)
m_pipes.Add(pd.pipe, pd);
}
// If server is still running
if (running) {
// Prepare for next connection
IpcServerPipeCreate();
// Alert server that client connection exists
m_callback.OnAsyncConnect(pipe, out pd.state);
// Accept messages
BeginRead(pd);
}
else {
pipe.Close();
}
}
private void BeginRead(IpcPipeData pd)
{
// Asynchronously read a request from the client
bool isConnected = pd.pipe.IsConnected;
if (isConnected) {
try {
pd.pipe.BeginRead(pd.data, 0, pd.data.Length, OnAsyncMessage, pd);
}
catch (Exception) {
isConnected = false;
}
}
if (!isConnected) {
pd.pipe.Close();
m_callback.OnAsyncDisconnect(pd.pipe, pd.state);
lock(m_pipes) {
bool removed = m_pipes.Remove(pd.pipe);
Debug.Assert(removed);
}
}
}
