internal CFSocket(CFSocketNativeHandle sock)
{
var cbTypes = CFSocketCallBackType.DataCallBack | CFSocketCallBackType.WriteCallBack;
gch = GCHandle.Alloc(this);
var ctx = new CFStreamClientContext();
ctx.Info = GCHandle.ToIntPtr(gch);
var ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(CFStreamClientContext)));
try {
Marshal.StructureToPtr(ctx, ptr, false);
handle = CFSocketCreateWithNative(
IntPtr.Zero, sock, (nuint)(ulong)cbTypes, OnCallback, ptr);
} finally {
Marshal.FreeHGlobal(ptr);
}
if (handle == IntPtr.Zero)
{
throw new CFSocketException(CFSocketError.Error);
}
var source = new CFRunLoopSource(CFSocketCreateRunLoopSource(IntPtr.Zero, handle, 0));
var loop = CFRunLoop.Current;
loop.AddSource(source, CFRunLoop.ModeDefault);
}
static void OnCallback(IntPtr s, nuint type, IntPtr address, IntPtr data, IntPtr info)
{
var socket = GCHandle.FromIntPtr(info).Target as CFSocket;
if (socket is null)
{
return;
}
CFSocketCallBackType cbType = (CFSocketCallBackType)(ulong)type;
if (cbType == CFSocketCallBackType.AcceptCallBack)
{
var ep = CFSocketAddress.EndPointFromAddressPtr(address);
var handle = new CFSocketNativeHandle(Marshal.ReadInt32(data));
socket.OnAccepted(new CFSocketAcceptEventArgs(handle, ep));
}
else if (cbType == CFSocketCallBackType.ConnectCallBack)
{
CFSocketError result;
if (data == IntPtr.Zero)
{
result = CFSocketError.Success;
}
else
{
// Note that we read a 32bit value even if CFSocketError is a nint:
// 'or a pointer to an SInt32 error code if the connect failed.'
result = (CFSocketError)Marshal.ReadInt32(data);
}
socket.OnConnect(new CFSocketConnectEventArgs(result));
}
else if (cbType == CFSocketCallBackType.DataCallBack)
{
var ep = CFSocketAddress.EndPointFromAddressPtr(address);
using (var cfdata = new CFData(data, false))
socket.OnData(new CFSocketDataEventArgs(ep, cfdata.GetBuffer()));
}
else if (cbType == CFSocketCallBackType.NoCallBack)
{
// nothing to do
}
else if (cbType == CFSocketCallBackType.ReadCallBack)
{
socket.OnRead(new CFSocketReadEventArgs());
}
else if (cbType == CFSocketCallBackType.WriteCallBack)
{
socket.OnWrite(new CFSocketWriteEventArgs());
}
}
CFSocket(CFSocketNativeHandle sock)
{
var cbTypes = CFSocketCallBackType.DataCallBack | CFSocketCallBackType.WriteCallBack;
gch = GCHandle.Alloc(this);
try {
var ctx = new CFStreamClientContext();
ctx.Info = GCHandle.ToIntPtr(gch);
var handle = CFSocketCreateWithNative(IntPtr.Zero, sock, (nuint)(ulong)cbTypes, OnCallback, ref ctx);
InitializeHandle(handle);
var source = new CFRunLoopSource(CFSocketCreateRunLoopSource(IntPtr.Zero, handle, 0), true);
var loop = CFRunLoop.Current;
loop.AddSource(source, CFRunLoop.ModeDefault);
} catch {
gch.Free();
throw;
}
}
public CFSocketAcceptEventArgs(CFSocketNativeHandle handle, IPEndPoint remote)
{
this.SocketHandle = handle;
this.RemoteEndPoint = remote;
}
extern static IntPtr CFSocketCreateWithNative(IntPtr allocator, CFSocketNativeHandle sock,
nuint /*CFOptionFlags*/ callBackTypes,
CFSocketCallBack callout, ref CFStreamClientContext ctx);
internal extern static void CFStreamCreatePairWithSocket(/* CFAllocatorRef */ IntPtr allocator, CFSocketNativeHandle sock,
/* CFReadStreamRef* */ out IntPtr readStream, /* CFWriteStreamRef* */ out IntPtr writeStream);
