/// <summary>
/// Initializes a new instance of the <see cref="TcpServer" /> class.
/// </summary>
public TcpServer(TcpServerSettings settings)
{
Settings = settings;
}
private static Boolean TryConfigureBindAndStartListen(SOCKET serverSocket, TcpServerSettings settings)
{
// try disable use of the Nagle algorithm if requested
if (settings.UseNagleAlgorithm == false)
{
var optionValue = -1;
unsafe
{
var tryDisableNagle = WinsockInterop.setsockopt(serverSocket, WinsockInterop.IPPROTO_TCP, WinsockInterop.TCP_NODELAY, (Byte*) &optionValue, sizeof(Int32));
// check if attempt has succeed
if (tryDisableNagle == WinsockInterop.SOCKET_ERROR)
{
return false;
}
}
}
// try enable faster operations on the loopback if requested
if (settings.UseFastLoopback)
{
unsafe
{
UInt32 optionValue = 1;
UInt32 dwBytes;
var tryEnableFastLoopbackResult = WinsockInterop.WSAIoctl(serverSocket, WinsockInterop.SIO_LOOPBACK_FAST_PATH, &optionValue, sizeof(UInt32), null, 0, out dwBytes, IntPtr.Zero, IntPtr.Zero);
// check if attempt has succeed
if (tryEnableFastLoopbackResult == WinsockInterop.SOCKET_ERROR)
{
return false;
}
}
}
// try bind
{
// compose address
var address = new IN_ADDR
{
s_addr = 0
};
// compose socket address
var socketAddress = new SOCKADDR_IN
{
sin_family = WinsockInterop.AF_INET,
sin_port = WinsockInterop.htons(settings.Port),
sin_addr = address
};
// try associate address with socket
var tryBindResult = WinsockInterop.bind(serverSocket, ref socketAddress, SOCKADDR_IN.Size);
if (tryBindResult == WinsockInterop.SOCKET_ERROR)
{
return false;
}
}
// try start listen
{
var tryStartListen = WinsockInterop.listen(serverSocket, settings.AcceptBacklogLength);
if (tryStartListen == WinsockInterop.SOCKET_ERROR)
{
return false;
}
}
return true;
}
/// <summary>
/// Activates server.
/// </summary>
public static TryResult<TcpWorker> TryInitialize(TcpServerSettings settings)
{
// 0 try initiates use of the Winsock DLL by a process
{
WSADATA data;
var startupResultCode = WinsockInterop.WSAStartup(WinsockInterop.Version, out data);
// check if startup was successful
if (startupResultCode != WinsockErrorCode.None)
{
return TryResult<TcpWorker>.CreateFail(startupResultCode);
}
}
// 1 try create server socket
SOCKET serverSocket;
{
serverSocket = WinsockInterop.WSASocket(WinsockInterop.AF_INET, (Int32) SocketType.Stream, (Int32) ProtocolType.Tcp, IntPtr.Zero, 0, WinsockInterop.WSA_FLAG_REGISTERED_IO);
// check if socket created
if (WinsockInterop.INVALID_SOCKET == serverSocket)
{
goto FAIL;
}
}
// 2 try initialize Registered I/O extension
RIOHandle rioHandle;
if (!RIOHandle.TryCreate(serverSocket, out rioHandle))
{
goto FAIL;
}
// 3 get count of processors
var processorsCount = Environment.ProcessorCount;
// 4 create collection of the IOCP workers
var workers = new IocpWorker[processorsCount];
// initialize workers
for (var processorIndex = 0; processorIndex < processorsCount; processorIndex++)
{
// try create worker
var tryCreateWorker = IocpWorker.TryCreate(rioHandle, processorIndex, 4096, 1024);
// check if operation has succeed
if (!tryCreateWorker.Success)
{
goto FAIL;
}
// add to collection
workers[processorIndex] = tryCreateWorker.Result;
}
// try configure server socket and start listen
if (!TryConfigureBindAndStartListen(serverSocket, settings))
{
goto FAIL;
}
// success
var server = new TcpWorker(serverSocket, rioHandle, workers);
foreach (var worker in workers)
{
worker.thread.Start();
}
return TryResult<TcpWorker>.CreateSuccess(server);
FAIL:
// get last error
var errorCode = (WinsockErrorCode) WinsockInterop.WSAGetLastError();
// terminate use of the Winsock DLL
WinsockInterop.WSACleanup();
// return fail
return TryResult<TcpWorker>.CreateFail(errorCode);
}
/// <summary>
/// Initializes a new instance of the <see cref="TcpServer" /> class.
/// </summary>
public TcpServer(TcpServerSettings settings)
{
Settings = settings;
}
private static Boolean TryConfigureBindAndStartListen(SOCKET serverSocket, TcpServerSettings settings)
{
// try disable use of the Nagle algorithm if requested
if (settings.UseNagleAlgorithm == false)
{
var optionValue = -1;
unsafe
{
var tryDisableNagle = WinsockInterop.setsockopt(serverSocket, WinsockInterop.IPPROTO_TCP, WinsockInterop.TCP_NODELAY, (Byte *)&optionValue, sizeof(Int32));
// check if attempt has succeed
if (tryDisableNagle == WinsockInterop.SOCKET_ERROR)
{
return(false);
}
}
}
// try enable faster operations on the loopback if requested
if (settings.UseFastLoopback)
{
unsafe
{
UInt32 optionValue = 1;
UInt32 dwBytes;
var tryEnableFastLoopbackResult = WinsockInterop.WSAIoctl(serverSocket, WinsockInterop.SIO_LOOPBACK_FAST_PATH, &optionValue, sizeof(UInt32), null, 0, out dwBytes, IntPtr.Zero, IntPtr.Zero);
// check if attempt has succeed
if (tryEnableFastLoopbackResult == WinsockInterop.SOCKET_ERROR)
{
return(false);
}
}
}
// try bind
{
// compose address
var address = new IN_ADDR
{
s_addr = 0
};
// compose socket address
var socketAddress = new SOCKADDR_IN
{
sin_family = WinsockInterop.AF_INET,
sin_port = WinsockInterop.htons(settings.Port),
sin_addr = address
};
// try associate address with socket
var tryBindResult = WinsockInterop.bind(serverSocket, ref socketAddress, SOCKADDR_IN.Size);
if (tryBindResult == WinsockInterop.SOCKET_ERROR)
{
return(false);
}
}
// try start listen
{
var tryStartListen = WinsockInterop.listen(serverSocket, settings.AcceptBacklogLength);
if (tryStartListen == WinsockInterop.SOCKET_ERROR)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Activates server.
/// </summary>
public static TryResult <TcpWorker> TryInitialize(TcpServerSettings settings)
{
// 0 try initiates use of the Winsock DLL by a process
{
WSADATA data;
var startupResultCode = WinsockInterop.WSAStartup(WinsockInterop.Version, out data);
// check if startup was successful
if (startupResultCode != WinsockErrorCode.None)
{
return(TryResult <TcpWorker> .CreateFail(startupResultCode));
}
}
// 1 try create server socket
SOCKET serverSocket;
{
serverSocket = WinsockInterop.WSASocket(WinsockInterop.AF_INET, (Int32)SocketType.Stream, (Int32)ProtocolType.Tcp, IntPtr.Zero, 0, WinsockInterop.WSA_FLAG_REGISTERED_IO);
// check if socket created
if (WinsockInterop.INVALID_SOCKET == serverSocket)
{
goto FAIL;
}
}
// 2 try initialize Registered I/O extension
RIOHandle rioHandle;
if (!RIOHandle.TryCreate(serverSocket, out rioHandle))
{
goto FAIL;
}
// 3 get count of processors
var processorsCount = Environment.ProcessorCount;
// 4 create collection of the IOCP workers
var workers = new IocpWorker[processorsCount];
// initialize workers
for (var processorIndex = 0; processorIndex < processorsCount; processorIndex++)
{
// try create worker
var tryCreateWorker = IocpWorker.TryCreate(rioHandle, processorIndex, 4096, 1024);
// check if operation has succeed
if (!tryCreateWorker.Success)
{
goto FAIL;
}
// add to collection
workers[processorIndex] = tryCreateWorker.Result;
}
// try configure server socket and start listen
if (!TryConfigureBindAndStartListen(serverSocket, settings))
{
goto FAIL;
}
// success
var server = new TcpWorker(serverSocket, rioHandle, workers);
foreach (var worker in workers)
{
worker.thread.Start();
}
return(TryResult <TcpWorker> .CreateSuccess(server));
FAIL:
// get last error
var errorCode = (WinsockErrorCode)WinsockInterop.WSAGetLastError();
// terminate use of the Winsock DLL
WinsockInterop.WSACleanup();
// return fail
return(TryResult <TcpWorker> .CreateFail(errorCode));
}
