private int HandleAccept(TSocket tacceptSocket)
{
var type = tacceptSocket.Type;
int clientFd = -1;
PosixResult result;
if (type == SocketFlags.TypeAccept)
{
// TODO: should we handle more than 1 accept? If we do, we shouldn't be to eager
// as that might give the kernel the impression we have nothing to do
// which could interfere with the SO_REUSEPORT load-balancing.
result = tacceptSocket.TryAccept(out clientFd, blocking: false);
}
else
{
result = tacceptSocket.TryReceiveSocket(out clientFd, blocking: false);
if (result.Value == 0)
{
// The socket passing us file descriptors has closed.
// We dispose our end so we get get removed from the epoll.
tacceptSocket.Close();
return(0);
}
}
if (result.IsSuccess)
{
TSocket tsocket;
try
{
SocketFlags flags = SocketFlags.TypeClient | (tacceptSocket.IsDeferSend ? SocketFlags.DeferSend : SocketFlags.None);
tsocket = new TSocket(this, clientFd, flags)
{
ZeroCopyThreshold = tacceptSocket.ZeroCopyThreshold
};
bool ipSocket = !object.ReferenceEquals(tacceptSocket.LocalAddress, NotIPSocket);
// Store the last LocalAddress on the tacceptSocket so we might reuse it instead
// of allocating a new one for the same address.
IPEndPointStruct localAddress = default(IPEndPointStruct);
IPEndPointStruct remoteAddress = default(IPEndPointStruct);
if (ipSocket && tsocket.TryGetLocalIPAddress(out localAddress, tacceptSocket.LocalAddress))
{
tsocket.LocalAddress = localAddress.Address;
tsocket.LocalPort = localAddress.Port;
if (tsocket.TryGetPeerIPAddress(out remoteAddress))
{
tsocket.RemoteAddress = remoteAddress.Address;
tsocket.RemotePort = remoteAddress.Port;
}
}
else
{
// This is not an IP socket.
tacceptSocket.LocalAddress = NotIPSocket;
ipSocket = false;
}
if (ipSocket)
{
tsocket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, 1);
}
}
catch
{
IOInterop.Close(clientFd);
return(0);
}
tsocket.MiddlewareTask = _connectionDispatcher.OnConnection(tsocket);
lock (_sockets)
{
_sockets.Add(clientFd, tsocket);
}
bool dataMayBeAvailable = tacceptSocket.IsDeferAccept;
tsocket.Start(dataMayBeAvailable);
return(1);
}
else
{
return(0);
}
}
private int HandleAccept(TSocket tacceptSocket)
{
var type = tacceptSocket.Type;
int clientFd = -1;
PosixResult result;
if (type == SocketFlags.TypeAccept)
{
// TODO: should we handle more than 1 accept? If we do, we shouldn't be to eager
// as that might give the kernel the impression we have nothing to do
// which could interfere with the SO_REUSEPORT load-balancing.
result = tacceptSocket.TryAccept(out clientFd, blocking: false);
}
else
{
result = tacceptSocket.TryReceiveSocket(out clientFd, blocking: false);
if (result.Value == 0)
{
// The socket passing us file descriptors has closed.
// We dispose our end so we get get removed from the epoll.
tacceptSocket.Close();
return(0);
}
}
if (result.IsSuccess)
{
TSocket tsocket;
try
{
SocketFlags flags = SocketFlags.TypeClient | (tacceptSocket.IsDeferSend ? SocketFlags.DeferSend : SocketFlags.None);
tsocket = new TSocket(this, clientFd, flags, _transportOptions)
{
ZeroCopyThreshold = tacceptSocket.ZeroCopyThreshold
};
var localIpEndPoint = tacceptSocket.LocalEndPoint as IPEndPoint;
bool ipSocket = !object.ReferenceEquals(localIpEndPoint?.Address, NotIPSocket);
// Store the last LocalAddress on the tacceptSocket so we might reuse it instead
// of allocating a new one for the same address.
IPEndPointStruct localAddress = default(IPEndPointStruct);
IPEndPointStruct remoteAddress = default(IPEndPointStruct);
if (ipSocket && tsocket.TryGetLocalIPAddress(out localAddress, localIpEndPoint?.Address))
{
tsocket.LocalEndPoint = new IPEndPoint(localAddress.Address, localAddress.Port);
if (tsocket.TryGetPeerIPAddress(out remoteAddress))
{
tsocket.RemoteEndPoint = new IPEndPoint(remoteAddress.Address, remoteAddress.Port);
}
}
else
{
// This is not an IP socket.
// REVIEW: Should LocalEndPoint be null instead? Some other EndPoint type?
tacceptSocket.LocalEndPoint = new IPEndPoint(NotIPSocket, 0);
ipSocket = false;
}
if (ipSocket)
{
tsocket.SetSocketOption(SOL_TCP, TCP_NODELAY, 1);
}
}
catch
{
IOInterop.Close(clientFd);
return(0);
}
bool accepted = _acceptQueue.Writer.TryWrite(tsocket);
Debug.Assert(accepted, "The connection was not written to the channel!");
lock (_sockets)
{
_sockets.Add(clientFd, tsocket);
}
bool dataMayBeAvailable = tacceptSocket.IsDeferAccept;
tsocket.Start(dataMayBeAvailable);
return(1);
}
else
{
return(0);
}
}