/// <summary>
/// Create global events necessary for handshaking with the parent
/// </summary>
/// <param name="nodeNumber"></param>
/// <returns>True if events created successfully and false otherwise</returns>
private static bool CreateGlobalEvents(int nodeNumber)
{
bool createdNew = false;
if (NativeMethods.IsUserAdministrator())
{
EventWaitHandleSecurity mSec = new EventWaitHandleSecurity();
// Add a rule that grants the access only to admins and systems
mSec.SetSecurityDescriptorSddlForm(NativeMethods.ADMINONLYSDDL);
// Create an initiation event to allow the parent side to prove to the child that we have the same level of privilege as it does.
// this is done by having the parent set this event which means it needs to have administrative permissions to do so.
globalInitiateActivationEvent = new EventWaitHandle(false, EventResetMode.ManualReset, LocalNodeProviderGlobalNames.NodeInitiateActivationEventName(nodeNumber), out createdNew, mSec);
}
else
{
// Create an initiation event to allow the parent side to prove to the child that we have the same level of privilege as it does.
// this is done by having the parent set this event which means it has atleast the same permissions as the child process
globalInitiateActivationEvent = new EventWaitHandle(false, EventResetMode.ManualReset, LocalNodeProviderGlobalNames.NodeInitiateActivationEventName(nodeNumber), out createdNew);
}
// This process must be the creator of the event to prevent squating by a lower privilaged attacker
if (!createdNew)
{
return false;
}
// Informs the parent process that the child process has been created.
globalNodeActive = new EventWaitHandle(false, EventResetMode.ManualReset, LocalNodeProviderGlobalNames.NodeActiveEventName(nodeNumber));
globalNodeActive.Set();
// Indicate to the parent process, this node is currently is ready to start to recieve requests
globalNodeInUse = new EventWaitHandle(false, EventResetMode.ManualReset, LocalNodeProviderGlobalNames.NodeInUseEventName(nodeNumber));
// Used by the parent process to inform the child process to shutdown due to the child process
// not recieving the initialization command.
globalNodeErrorShutdown = new EventWaitHandle(false, EventResetMode.ManualReset, LocalNodeProviderGlobalNames.NodeErrorShutdownEventName(nodeNumber));
// Inform the parent process the node has started its communication threads.
globalNodeActivate = new EventWaitHandle(false, EventResetMode.ManualReset, LocalNodeProviderGlobalNames.NodeActivedEventName(nodeNumber));
return true;
}
