Windows Minifilter Driver - User mode to Kernel mode Communication

The filter manager supports communication between user mode and kernel mode through "communication ports". The minifilter driver controls security on the port by specifying a security descriptor to be applied to the communication port object. Communication through a communication port is not buffered, so it is faster and more efficient. A user-mode application or service can reply to messages from a minifilter driver for bidirectional communication.

ref:

User mode to Kernel mode communication (Communication Ports) - http://msdn.microsoft.com/en-us/library/ff539277(v=vs.85).aspx

User-Mode Interactions: Guidelines for Kernel-Mode Drivers(KM-UMGuide.doc) -

http://msdn.microsoft.com/en-us/windows/hardware/gg487414.aspx

Kernel mode to User mode Communication - http://www.osronline.com/showThread.cfm?link=90062

Windows Kernel Internals - http://sww-it.ru/wp-content/uploads/2011/University%20of%20Tokyo%20Windows%20Internals%20Lectures/10-LPC/LPC.pdf

Kernel Mode to User Mode Communication WFP Driver - http://www.osronline.com/showthread.cfm?link=205452

User to Kernel Communication Model - http://muglin.ru/messagesupport.ppt

Filter Manager support in Usermode - http://muglin.ru/UserModeLib.ppt