public bool AcceptAsync(SocketAsyncEventArgs e)
{
bool retval;
if (s_loggingEnabled)
{
Logging.Enter(Logging.Sockets, this, "AcceptAsync", "");
}
if (CleanedUp)
{
throw new ObjectDisposedException(GetType().FullName);
}
if (e == null)
{
throw new ArgumentNullException("e");
}
if (e._bufferList != null)
{
throw new ArgumentException(SR.net_multibuffernotsupported, "BufferList");
}
if (_rightEndPoint == null)
{
throw new InvalidOperationException(SR.net_sockets_mustbind);
}
if (!_isListening)
{
throw new InvalidOperationException(SR.net_sockets_mustlisten);
}
// Handle AcceptSocket property.
SafeCloseSocket acceptHandle;
e.AcceptSocket = GetOrCreateAcceptSocket(e.AcceptSocket, true, "AcceptSocket", out acceptHandle);
// Prepare for the native call.
e.StartOperationCommon(this);
e.StartOperationAccept();
// Local variables for sync completion.
int bytesTransferred;
SocketError socketError = SocketError.Success;
// Make the native call.
try
{
socketError = e.DoOperationAccept(this, _handle, acceptHandle, out bytesTransferred);
}
catch (Exception ex)
{
// Clear in-use flag on event args object.
e.Complete();
throw ex;
}
// Handle completion when completion port is not posted.
if (socketError != SocketError.Success && socketError != SocketError.IOPending)
{
e.FinishOperationSyncFailure(socketError, bytesTransferred, SocketFlags.None);
retval = false;
}
else
{
retval = true;
}
if (s_loggingEnabled)
{
Logging.Exit(Logging.Sockets, this, "AcceptAsync", retval);
}
return retval;
}
/// <summary>
/// Begins an asynchronous operation to accept an incoming connection attempt.
/// </summary>
///
/// <returns>
/// Returns true if the I/O operation is pending. The <see cref="E:System.Net.Sockets.SocketAsyncEventArgs.Completed"/> event on the <paramref name="e"/> parameter will be raised upon completion of the operation.Returns false if the I/O operation completed synchronously. The <see cref="E:System.Net.Sockets.SocketAsyncEventArgs.Completed"/> event on the <paramref name="e"/> parameter will not be raised and the <paramref name="e"/> object passed as a parameter may be examined immediately after the method call returns to retrieve the result of the operation.
/// </returns>
/// <param name="e">The <see cref="T:System.Net.Sockets.SocketAsyncEventArgs"/> object to use for this asynchronous socket operation.</param><exception cref="T:System.ArgumentException">An argument is not valid. This exception occurs if the buffer provided is not large enough. The buffer must be at least 2 * (sizeof(SOCKADDR_STORAGE + 16) bytes. This exception also occurs if multiple buffers are specified, the <see cref="P:System.Net.Sockets.SocketAsyncEventArgs.BufferList"/> property is not null.</exception><exception cref="T:System.ArgumentOutOfRangeException">An argument is out of range. The exception occurs if the <see cref="P:System.Net.Sockets.SocketAsyncEventArgs.Count"/> is less than 0.</exception><exception cref="T:System.InvalidOperationException">An invalid operation was requested. This exception occurs if the accepting <see cref="T:System.Net.Sockets.Socket"/> is not listening for connections or the accepted socket is bound. You must call the <see cref="M:System.Net.Sockets.Socket.Bind(System.Net.EndPoint)"/> and <see cref="M:System.Net.Sockets.Socket.Listen(System.Int32)"/> method before calling the <see cref="M:System.Net.Sockets.Socket.AcceptAsync(System.Net.Sockets.SocketAsyncEventArgs)"/> method.This exception also occurs if the socket is already connected or a socket operation was already in progress using the specified <paramref name="e"/> parameter. </exception><exception cref="T:System.Net.Sockets.SocketException">An error occurred when attempting to access the socket. See the Remarks section for more information. </exception><exception cref="T:System.NotSupportedException">Windows XP or later is required for this method.</exception><exception cref="T:System.ObjectDisposedException">The <see cref="T:System.Net.Sockets.Socket"/> has been closed. </exception>
public bool AcceptAsync(SocketAsyncEventArgs e)
{
if (Socket.s_LoggingEnabled)
Logging.Enter(Logging.Sockets, (object) this, "AcceptAsync", "");
if (this.CleanedUp)
throw new ObjectDisposedException(this.GetType().FullName);
if (e.m_BufferList != null)
throw new ArgumentException(SR.GetString("net_multibuffernotsupported"), "BufferList");
if (this.m_RightEndPoint == null)
throw new InvalidOperationException(SR.GetString("net_sockets_mustbind"));
if (!this.isListening)
throw new InvalidOperationException(SR.GetString("net_sockets_mustlisten"));
if (e.AcceptSocket == null)
e.AcceptSocket = new Socket(this.addressFamily, this.socketType, this.protocolType);
else if (e.AcceptSocket.m_RightEndPoint != null && !e.AcceptSocket.m_IsDisconnected)
throw new InvalidOperationException(SR.GetString("net_sockets_namedmustnotbebound", new object[1]
{
(object) "AcceptSocket"
}));
e.StartOperationCommon(this);
e.StartOperationAccept();
this.BindToCompletionPort();
SocketError socketError = SocketError.Success;
int bytesReceived;
try
{
if (!this.AcceptEx(this.m_Handle, e.AcceptSocket.m_Handle, e.m_PtrSingleBuffer != IntPtr.Zero ? e.m_PtrSingleBuffer : e.m_PtrAcceptBuffer, e.m_PtrSingleBuffer != IntPtr.Zero ? e.Count - e.m_AcceptAddressBufferCount : 0, e.m_AcceptAddressBufferCount / 2, e.m_AcceptAddressBufferCount / 2, out bytesReceived, (SafeHandle) e.m_PtrNativeOverlapped))
socketError = (SocketError) Marshal.GetLastWin32Error();
}
catch (Exception ex)
{
e.Complete();
throw ex;
}
bool flag;
if (socketError != SocketError.Success && socketError != SocketError.IOPending)
{
e.FinishOperationSyncFailure(socketError, bytesReceived, SocketFlags.None);
flag = false;
}
else
flag = true;
if (Socket.s_LoggingEnabled)
Logging.Exit(Logging.Sockets, (object) this, "AcceptAsync", (object) (bool) (flag ? 1 : 0));
return flag;
}
//
// AcceptAsync
//
public bool AcceptAsync(SocketAsyncEventArgs e) {
bool retval;
if(s_LoggingEnabled) Logging.Enter(Logging.Sockets, this, "AcceptAsync", "");
// Throw if socket disposed
if(CleanedUp) {
throw new ObjectDisposedException(GetType().FullName);
}
// Throw if multiple buffers specified.
if(e.m_BufferList != null) {
throw new ArgumentException(SR.GetString(SR.net_multibuffernotsupported), "BufferList");
}
// Throw if not bound.
if(m_RightEndPoint == null) {
throw new InvalidOperationException(SR.GetString(SR.net_sockets_mustbind));
}
// Throw if not listening.
if(!isListening) {
throw new InvalidOperationException(SR.GetString(SR.net_sockets_mustlisten));
}
// Handle AcceptSocket property.
if(e.AcceptSocket == null) {
// Accept socket not specified - create it.
e.AcceptSocket = new Socket(addressFamily, socketType, protocolType);
} else {
// Validate accept socket for use here.
if(e.AcceptSocket.m_RightEndPoint != null && !e.AcceptSocket.m_IsDisconnected) {
throw new InvalidOperationException(SR.GetString(SR.net_sockets_namedmustnotbebound, "AcceptSocket"));
}
}
// Prepare for the native call.
e.StartOperationCommon(this);
e.StartOperationAccept();
BindToCompletionPort();
// Local variables for [....] completion.
int bytesTransferred;
SocketError socketError = SocketError.Success;
// Make the native call.
try {
if(!AcceptEx(
m_Handle,
e.AcceptSocket.m_Handle,
(e.m_PtrSingleBuffer != IntPtr.Zero) ? e.m_PtrSingleBuffer : e.m_PtrAcceptBuffer,
(e.m_PtrSingleBuffer != IntPtr.Zero) ? e.Count - e.m_AcceptAddressBufferCount : 0,
e.m_AcceptAddressBufferCount / 2,
e.m_AcceptAddressBufferCount / 2,
out bytesTransferred,
e.m_PtrNativeOverlapped)) {
socketError = (SocketError)Marshal.GetLastWin32Error();
}
}
catch (Exception ex) {
// clear in-use on event arg object
e.Complete();
throw ex;
}
// Handle completion when completion port is not posted.
if(socketError != SocketError.Success && socketError != SocketError.IOPending) {
e.FinishOperationSyncFailure(socketError, bytesTransferred, SocketFlags.None);
retval = false;
} else {
retval = true;
}
if(s_LoggingEnabled) Logging.Exit(Logging.Sockets, this, "AcceptAsync", retval);
return retval;
}
public bool AcceptAsync(SocketAsyncEventArgs e)
{
bool flag;
int num;
if (s_LoggingEnabled)
{
Logging.Enter(Logging.Sockets, this, "AcceptAsync", "");
}
if (this.CleanedUp)
{
throw new ObjectDisposedException(base.GetType().FullName);
}
if (e.m_BufferList != null)
{
throw new ArgumentException(SR.GetString("net_multibuffernotsupported"), "BufferList");
}
if (this.m_RightEndPoint == null)
{
throw new InvalidOperationException(SR.GetString("net_sockets_mustbind"));
}
if (!this.isListening)
{
throw new InvalidOperationException(SR.GetString("net_sockets_mustlisten"));
}
if (e.AcceptSocket == null)
{
e.AcceptSocket = new Socket(this.addressFamily, this.socketType, this.protocolType);
}
else if ((e.AcceptSocket.m_RightEndPoint != null) && !e.AcceptSocket.m_IsDisconnected)
{
throw new InvalidOperationException(SR.GetString("net_sockets_namedmustnotbebound", new object[] { "AcceptSocket" }));
}
e.StartOperationCommon(this);
e.StartOperationAccept();
this.BindToCompletionPort();
SocketError success = SocketError.Success;
try
{
if (!this.AcceptEx(this.m_Handle, e.AcceptSocket.m_Handle, (e.m_PtrSingleBuffer != IntPtr.Zero) ? e.m_PtrSingleBuffer : e.m_PtrAcceptBuffer, (e.m_PtrSingleBuffer != IntPtr.Zero) ? (e.Count - e.m_AcceptAddressBufferCount) : 0, e.m_AcceptAddressBufferCount / 2, e.m_AcceptAddressBufferCount / 2, out num, e.m_PtrNativeOverlapped))
{
success = (SocketError) Marshal.GetLastWin32Error();
}
}
catch (Exception exception)
{
e.Complete();
throw exception;
}
if ((success != SocketError.Success) && (success != SocketError.IOPending))
{
e.FinishOperationSyncFailure(success, num, SocketFlags.None);
flag = false;
}
else
{
flag = true;
}
if (s_LoggingEnabled)
{
Logging.Exit(Logging.Sockets, this, "AcceptAsync", flag);
}
return flag;
}