public void Hook()
{
if (IsHooked)
{
return;
}
var ri = new RemoteInterface
{
//Wrap the target delegate in our own delegate for reference safety
SystemId = (x, y) => _systemDeviceId(x, y),
Unload = () => !IsHooked,
ErrorHandler = RaiseOnError
};
RemoteHooking.IpcCreateServer(ref _channelName, WellKnownObjectMode.Singleton, ri);
RemoteHooking.Inject(
_processId,
InjectionOptions.DoNotRequireStrongName,
typeof(IMMDeviceEnumerator).Assembly.Location,
typeof(IMMDeviceEnumerator).Assembly.Location,
_channelName);
IsHooked = true;
}
private static void ReportError(RemoteInterface remoteInterface, Exception ex)
{
try
{
remoteInterface.ReportError(RemoteHooking.GetCurrentProcessId(), ex);
}
catch
{
// ignored
}
}
public bool Hook(int processId)
{
if (Status == EHookStatus.Active || Status == EHookStatus.Pending)
{
return(false);
}
Status = EHookStatus.Pending;
_hookedProcessId = processId;
_interface = new RemoteInterface
(
(x, y) => _systemDeviceId(x, y),
CanUnload,
HookInstalled,
OnComplete,
OnError
);
_ipcChannel = RemoteHooking.IpcCreateServer(ref _channelName, WellKnownObjectMode.Singleton, _interface);
try
{
RemoteHooking.Inject(
processId,
InjectionOptions.DoNotRequireStrongName,
typeof(IMultimediaDeviceEnumerator).Assembly.Location,
typeof(IMultimediaDeviceEnumerator).Assembly.Location,
_channelName);
//2000ms due time. This will give the hook 2seconds to become active
//then it will check every 500ms
_hookIsLiveTimer = new Timer(HookIsLive, null, 2000, 500);
_lastMessageCount = -1;
_completeSignalled = false;
return(true);
}
catch (Exception ex)
{
Status = EHookStatus.Inactive;
Error?.Invoke(_hookedProcessId, ex);
}
return(false);
}
public EntryPoint(RemoteHooking.IContext inContext, string inChannelName)
{
_interface = RemoteHooking.IpcConnectClient <RemoteInterface>(inChannelName);
}
