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* Added proper socket disconnecting sequence

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* Fixed socket.EndReceive call
This commit is contained in:
raufismayilov 2024-05-29 12:29:33 +04:00
parent dd7b945ddc
commit 8870fe9acd
1 changed files with 32 additions and 25 deletions
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57
SMBLibrary/Client/SMB2Client.cs
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@ -35,6 +35,7 @@ namespace SMBLibrary.Client
private Socket m_clientSocket;
private ConnectionState m_connectionState;
private int m_responseTimeoutInMilliseconds;
private EventWaitHandle m_disconnectedEventHandle = new EventWaitHandle(false, EventResetMode.ManualReset);
private object m_incomingQueueLock = new object();
private List<SMB2Command> m_incomingQueue = new List<SMB2Command>();
@ -120,7 +121,7 @@ namespace SMBLibrary.Client
SessionPacket sessionResponsePacket = WaitForSessionResponsePacket();
if (!(sessionResponsePacket is PositiveSessionResponsePacket))
{
m_clientSocket.Disconnect(false);
DisconnectSocket();
if (!ConnectSocket(serverAddress, port))
{
return false;
@ -147,6 +148,7 @@ namespace SMBLibrary.Client
bool supportsDialect = NegotiateDialect();
if (!supportsDialect)
{
DisconnectSocket();
m_clientSocket.Close();
}
else
@ -159,6 +161,7 @@ namespace SMBLibrary.Client
private bool ConnectSocket(IPAddress serverAddress, int port)
{
m_disconnectedEventHandle.Reset();
m_clientSocket = new Socket(serverAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
try
@ -176,11 +179,18 @@ namespace SMBLibrary.Client
return true;
}
private void DisconnectSocket()
{
m_clientSocket.Shutdown(SocketShutdown.Send);
m_disconnectedEventHandle.WaitOne();
m_clientSocket.Shutdown(SocketShutdown.Receive);
}
public void Disconnect()
{
if (m_isConnected)
{
m_clientSocket.Disconnect(false);
DisconnectSocket();
m_clientSocket.Close();
m_connectionState.ReceiveBuffer.Dispose();
m_isConnected = false;
@ -357,12 +367,6 @@ namespace SMBLibrary.Client
ConnectionState state = (ConnectionState)ar.AsyncState;
Socket clientSocket = state.ClientSocket;
if (!clientSocket.Connected)
{
state.ReceiveBuffer.Dispose();
return;
}
int numberOfBytesReceived = 0;
try
{
@ -371,18 +375,21 @@ namespace SMBLibrary.Client
catch (ArgumentException) // The IAsyncResult object was not returned from the corresponding synchronous method on this class.
{
state.ReceiveBuffer.Dispose();
m_disconnectedEventHandle.Set();
return;
}
catch (ObjectDisposedException)
{
Log("[ReceiveCallback] EndReceive ObjectDisposedException");
state.ReceiveBuffer.Dispose();
m_disconnectedEventHandle.Set();
return;
}
catch (SocketException ex)
{
Log("[ReceiveCallback] EndReceive SocketException: " + ex.Message);
state.ReceiveBuffer.Dispose();
m_disconnectedEventHandle.Set();
return;
}
@ -390,6 +397,7 @@ namespace SMBLibrary.Client
{
m_isConnected = false;
state.ReceiveBuffer.Dispose();
m_disconnectedEventHandle.Set();
}
else
{
@ -397,24 +405,23 @@ namespace SMBLibrary.Client
buffer.SetNumberOfBytesReceived(numberOfBytesReceived);
ProcessConnectionBuffer(state);
if (clientSocket.Connected)
try
{
try
{
clientSocket.BeginReceive(buffer.Buffer, buffer.WriteOffset, buffer.AvailableLength, SocketFlags.None, new AsyncCallback(OnClientSocketReceive), state);
}
catch (ObjectDisposedException)
{
m_isConnected = false;
Log("[ReceiveCallback] BeginReceive ObjectDisposedException");
buffer.Dispose();
}
catch (SocketException ex)
{
m_isConnected = false;
Log("[ReceiveCallback] BeginReceive SocketException: " + ex.Message);
buffer.Dispose();
}
clientSocket.BeginReceive(buffer.Buffer, buffer.WriteOffset, buffer.AvailableLength, SocketFlags.None, new AsyncCallback(OnClientSocketReceive), state);
}
catch (ObjectDisposedException)
{
m_isConnected = false;
Log("[ReceiveCallback] BeginReceive ObjectDisposedException");
buffer.Dispose();
m_disconnectedEventHandle.Set();
}
catch (SocketException ex)
{
m_isConnected = false;
Log("[ReceiveCallback] BeginReceive SocketException: " + ex.Message);
buffer.Dispose();
m_disconnectedEventHandle.Set();
}
}
}