internal static void CompleteInitialization(SafeCloseSocketAndEvent socketAndEventHandle)
{
SafeWaitHandle safeWaitHandle = socketAndEventHandle.waitHandle.SafeWaitHandle;
bool success = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
safeWaitHandle.DangerousAddRef(ref success);
}
catch
{
if (success)
{
safeWaitHandle.DangerousRelease();
socketAndEventHandle.waitHandle = null;
success = false;
}
}
finally
{
if (success)
{
safeWaitHandle.Dispose();
}
}
}
internal static SafeCloseSocketAndEvent CreateWSASocketWithEvent(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, bool autoReset, bool signaled)
{
SafeCloseSocketAndEvent target = new SafeCloseSocketAndEvent();
SafeCloseSocket.CreateSocket(SafeCloseSocket.InnerSafeCloseSocket.CreateWSASocket(addressFamily, socketType, protocolType), target);
if (target.IsInvalid)
{
throw new SocketException();
}
target.waitHandle = new AutoResetEvent(false);
CompleteInitialization(target);
return target;
}
internal NetworkAddressChangePolled()
{
int num;
Socket.InitializeSockets();
if (Socket.OSSupportsIPv4)
{
num = -1;
this.ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.IP, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(this.ipv4Socket, -2147195266, ref num);
}
if (Socket.OSSupportsIPv6)
{
num = -1;
this.ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.IP, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(this.ipv6Socket, -2147195266, ref num);
}
this.Setup(StartIPOptions.Both);
}
public void Dispose()
{
if (!this.disposed)
{
lock (this)
{
if (!this.disposed)
{
if (this.ipv6Socket != null)
{
this.ipv6Socket.Close();
this.ipv6Socket = null;
}
if (this.ipv4Socket != null)
{
this.ipv4Socket.Close();
this.ipv6Socket = null;
}
this.disposed = true;
}
}
}
}
private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
{
lock (s_callerArray) {
// setup changedEvent and native overlapped struct.
if(s_ipv4Socket == null){
Socket.InitializeSockets();
int blocking;
if(Socket.OSSupportsIPv4){
blocking = -1;
s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, (ProtocolType)0, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv4Socket, IoctlSocketConstants.FIONBIO,ref blocking);
s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
}
if(Socket.OSSupportsIPv6){
blocking = -1;
s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, (ProtocolType)0, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv6Socket,IoctlSocketConstants.FIONBIO,ref blocking);
s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
}
}
if ((caller != null) && (!s_callerArray.Contains(caller))) {
s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
}
//if s_listener is not null, it means we are already actively listening
if (s_isListening || s_callerArray.Count == 0) {
return;
}
if(!s_isPending){
int length;
SocketError errorCode;
if(Socket.OSSupportsIPv4 && (startIPOptions & StartIPOptions.StartIPv4) !=0){
s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(
s_ipv4WaitHandle,
new WaitOrTimerCallback(AddressChangedCallback),
StartIPOptions.StartIPv4,
-1,
true );
errorCode = (SocketError) UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(
s_ipv4Socket.DangerousGetHandle(),
(int) IOControlCode.AddressListChange,
null, 0, null, 0,
out length,
SafeNativeOverlapped.Zero, IntPtr.Zero);
if (errorCode != SocketError.Success) {
NetworkInformationException exception = new NetworkInformationException();
if (exception.ErrorCode != (uint)SocketError.WouldBlock) {
throw exception;
}
}
errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv4Socket, s_ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange);
if (errorCode != SocketError.Success) {
throw new NetworkInformationException();
}
}
if(Socket.OSSupportsIPv6 && (startIPOptions & StartIPOptions.StartIPv6) !=0){
s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(
s_ipv6WaitHandle,
new WaitOrTimerCallback(AddressChangedCallback),
StartIPOptions.StartIPv6,
-1,
true );
errorCode = (SocketError) UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(
s_ipv6Socket.DangerousGetHandle(),
(int) IOControlCode.AddressListChange,
null, 0, null, 0,
out length,
SafeNativeOverlapped.Zero, IntPtr.Zero);
if (errorCode != SocketError.Success) {
NetworkInformationException exception = new NetworkInformationException();
if (exception.ErrorCode != (uint)SocketError.WouldBlock) {
throw exception;
}
}
errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv6Socket, s_ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange);
if (errorCode != SocketError.Success) {
throw new NetworkInformationException();
}
}
}
s_isListening = true;
s_isPending = true;
}
}
private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
{
lock (s_callerArray)
{
// Setup changedEvent and native overlapped struct.
if (s_ipv4Socket == null)
{
int blocking;
// Sockets will be initialized by the call to OSSupportsIP*.
if (Socket.OSSupportsIPv4)
{
blocking = -1;
s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, (ProtocolType)0, true, false);
Interop.Winsock.ioctlsocket(s_ipv4Socket, Interop.Winsock.IoctlSocketConstants.FIONBIO, ref blocking);
s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
}
if (Socket.OSSupportsIPv6)
{
blocking = -1;
s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, (ProtocolType)0, true, false);
Interop.Winsock.ioctlsocket(s_ipv6Socket, Interop.Winsock.IoctlSocketConstants.FIONBIO, ref blocking);
s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
}
}
if ((caller != null) && (!s_callerArray.ContainsKey(caller)))
{
s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
}
if (s_isListening || s_callerArray.Count == 0)
{
return;
}
if (!s_isPending)
{
int length;
SocketError errorCode;
if (Socket.OSSupportsIPv4 && (startIPOptions & StartIPOptions.StartIPv4) != 0)
{
s_registeredWait = ThreadPool.RegisterWaitForSingleObject(
s_ipv4WaitHandle,
new WaitOrTimerCallback(AddressChangedCallback),
StartIPOptions.StartIPv4,
-1,
true);
errorCode = Interop.Winsock.WSAIoctl_Blocking(
s_ipv4Socket.DangerousGetHandle(),
(int)IOControlCode.AddressListChange,
null, 0, null, 0,
out length,
SafeNativeOverlapped.Zero, IntPtr.Zero);
if (errorCode != SocketError.Success)
{
NetworkInformationException exception = new NetworkInformationException();
if (exception.ErrorCode != (uint)SocketError.WouldBlock)
{
throw exception;
}
}
SafeWaitHandle s_ipv4SocketGetEventHandleSafeWaitHandle =
s_ipv4Socket.GetEventHandle().GetSafeWaitHandle();
errorCode = Interop.Winsock.WSAEventSelect(
s_ipv4Socket,
s_ipv4SocketGetEventHandleSafeWaitHandle,
Interop.Winsock.AsyncEventBits.FdAddressListChange);
if (errorCode != SocketError.Success)
{
throw new NetworkInformationException();
}
}
if (Socket.OSSupportsIPv6 && (startIPOptions & StartIPOptions.StartIPv6) != 0)
{
s_registeredWait = ThreadPool.RegisterWaitForSingleObject(
s_ipv6WaitHandle,
new WaitOrTimerCallback(AddressChangedCallback),
StartIPOptions.StartIPv6,
-1,
true);
errorCode = Interop.Winsock.WSAIoctl_Blocking(
s_ipv6Socket.DangerousGetHandle(),
(int)IOControlCode.AddressListChange,
null, 0, null, 0,
out length,
SafeNativeOverlapped.Zero, IntPtr.Zero);
if (errorCode != SocketError.Success)
{
NetworkInformationException exception = new NetworkInformationException();
if (exception.ErrorCode != (uint)SocketError.WouldBlock)
{
throw exception;
}
}
SafeWaitHandle s_ipv6SocketGetEventHandleSafeWaitHandle =
s_ipv6Socket.GetEventHandle().GetSafeWaitHandle();
errorCode = Interop.Winsock.WSAEventSelect(
s_ipv6Socket,
s_ipv6SocketGetEventHandleSafeWaitHandle,
Interop.Winsock.AsyncEventBits.FdAddressListChange);
if (errorCode != SocketError.Success)
{
throw new NetworkInformationException();
}
}
}
s_isListening = true;
s_isPending = true;
}
}
public void Dispose()
{
if(!disposed){
lock (this){
if (!disposed){
if(ipv6Socket != null){
ipv6Socket.Close();
ipv6Socket = null;
}
if(ipv4Socket != null){
ipv4Socket.Close();
ipv6Socket = null;
}
disposed = true;
}
}
}
}
internal unsafe NetworkAddressChangePolled()
{
Socket.InitializeSockets();
int blocking;
if (Socket.OSSupportsIPv4)
{
blocking = -1;
ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, (ProtocolType)0, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(ipv4Socket, IoctlSocketConstants.FIONBIO, ref blocking);
}
if(Socket.OSSupportsIPv6){
blocking = -1;
ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, (ProtocolType)0, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(ipv6Socket,IoctlSocketConstants.FIONBIO,ref blocking);
}
Setup(StartIPOptions.Both);
}
private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
{
lock (s_callerArray)
{
if (s_ipv4Socket == null)
{
int num;
Socket.InitializeSockets();
if (Socket.OSSupportsIPv4)
{
num = -1;
s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.IP, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv4Socket, -2147195266, ref num);
s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
}
if (Socket.OSSupportsIPv6)
{
num = -1;
s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.IP, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv6Socket, -2147195266, ref num);
s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
}
}
if ((caller != null) && !s_callerArray.Contains(caller))
{
s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
}
if (!s_isListening && (s_callerArray.Count != 0))
{
if (!s_isPending)
{
int num2;
if (Socket.OSSupportsIPv4 && ((startIPOptions & StartIPOptions.StartIPv4) != StartIPOptions.None))
{
s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv4WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv4, -1, true);
if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv4Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
{
NetworkInformationException exception = new NetworkInformationException();
if (exception.ErrorCode != 0x2733L)
{
throw exception;
}
}
if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv4Socket, s_ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
{
throw new NetworkInformationException();
}
}
if (Socket.OSSupportsIPv6 && ((startIPOptions & StartIPOptions.StartIPv6) != StartIPOptions.None))
{
s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv6WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv6, -1, true);
if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv6Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
{
NetworkInformationException exception2 = new NetworkInformationException();
if (exception2.ErrorCode != 0x2733L)
{
throw exception2;
}
}
if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv6Socket, s_ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
{
throw new NetworkInformationException();
}
}
}
s_isListening = true;
s_isPending = true;
}
}
}
private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
{
lock (s_callerArray)
{
if (s_ipv4Socket == null)
{
int num;
Socket.InitializeSockets();
if (Socket.OSSupportsIPv4)
{
num = -1;
s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.IP, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv4Socket, -2147195266, ref num);
s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
}
if (Socket.OSSupportsIPv6)
{
num = -1;
s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.IP, true, false);
UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv6Socket, -2147195266, ref num);
s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
}
}
if ((caller != null) && !s_callerArray.Contains(caller))
{
s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
}
if (!s_isListening && (s_callerArray.Count != 0))
{
if (!s_isPending)
{
int num2;
if (Socket.OSSupportsIPv4 && ((startIPOptions & StartIPOptions.StartIPv4) != StartIPOptions.None))
{
s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv4WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv4, -1, true);
if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv4Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
{
NetworkInformationException exception = new NetworkInformationException();
if (exception.ErrorCode != 0x2733L)
{
throw exception;
}
}
if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv4Socket, s_ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
{
throw new NetworkInformationException();
}
}
if (Socket.OSSupportsIPv6 && ((startIPOptions & StartIPOptions.StartIPv6) != StartIPOptions.None))
{
s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv6WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv6, -1, true);
if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv6Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
{
NetworkInformationException exception2 = new NetworkInformationException();
if (exception2.ErrorCode != 0x2733L)
{
throw exception2;
}
}
if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv6Socket, s_ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
{
throw new NetworkInformationException();
}
}
}
s_isListening = true;
s_isPending = true;
}
}
}
