User-Mode Listener Dispatching Network Connections
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Solution Overview
Problem
Current network listener technologies face challenges in balancing security and speed, as user-mode listeners are limited by bottlenecks in communication speeds and kernel-mode listeners expose system memory to potential malicious access.
Innovation Solution
A user-mode listener can dispatch control of a client connection to a network component without exposing system memory or services by using socket duplication and dispatch logic to transfer control, allowing direct communication between client and network components at speeds similar to kernel-mode while maintaining user-mode security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a user-mode listener is used to maintain security, then system memory protection is improved, but communication speed deteriorates due to relay bottlenecks
Solution Approach 1:
The system dynamically switches between two operational modes: initially operating in user-mode for secure connection establishment, then transitioning to kernel-mode for high-speed data transfer. This dynamic adaptation allows the system to optimize for security during connection setup and for speed during active communication, resolving the speed-security tradeoff.
Solution Approach 2:
The communication process is segmented into distinct phases: connection establishment phase (user-mode) and data transfer phase (kernel-mode). Each phase is handled by the appropriate mode optimized for its specific function, allowing security-critical operations to occur in user-mode while performance-critical operations occur in kernel-mode.
2Productivity
If a kernel-mode listener is used to improve communication speed, then communication efficiency is improved, but system memory exposure to malicious access worsens
Solution Approach 1:
The system dynamically switches between two operational modes: initially operating in user-mode for secure connection establishment, then transitioning to kernel-mode for high-speed data transfer. This dynamic adaptation allows the system to optimize for security during connection setup and for speed during active communication, resolving the speed-security tradeoff.
Solution Approach 2:
The user-mode listener acts as an intermediary that verifies and controls the transition to kernel-mode. It validates client credentials and connection requests before allowing kernel-mode access, ensuring that only authorized communications can exploit the speed benefits of kernel-mode while preventing malicious access to system memory.
3Reliability
If a user-mode listener relays all data through communication mechanisms, then security is maintained, but communication bottleneck worsens
Solution Approach 1:
The system dynamically switches between two operational modes: initially operating in user-mode for secure connection establishment, then transitioning to kernel-mode for high-speed data transfer. This dynamic adaptation allows the system to optimize for security during connection setup and for speed during active communication, resolving the speed-security tradeoff.
Solution Approach 2:
The communication process is segmented into distinct phases: connection establishment phase (user-mode) and data transfer phase (kernel-mode). Each phase is handled by the appropriate mode optimized for its specific function, allowing security-critical operations to occur in user-mode while performance-critical operations occur in kernel-mode.
4Speed
If direct communication is allowed between client and network components, then communication speed is improved, but security control worsens
Solution Approach 1:
The system dynamically switches between two operational modes: initially operating in user-mode for secure connection establishment, then transitioning to kernel-mode for high-speed data transfer. This dynamic adaptation allows the system to optimize for security during connection setup and for speed during active communication, resolving the speed-security tradeoff.
Solution Approach 2:
The user-mode listener acts as an intermediary that verifies and controls the transition to kernel-mode. It validates client credentials and connection requests before allowing kernel-mode access, ensuring that only authorized communications can exploit the speed benefits of kernel-mode while preventing malicious access to system memory.
Data Source
AI summary
A listener operating in user-mode can dispatch control of a client connection to a listener without exposing system memory or other sensitive services or components. For example, a client component requests access to a network component through connection with a user-mode listener. Based on information contained in the client request, the listener passes a call to an application program interface, which returns a first set of data that includes user-mode contextual information. The listener passes this first set of data to the requested network component. Another call is made to an application program interface, which includes the first set of data, and a request for socket duplication. The application program interface returns control of the requested socket to the network component, such that the network component and the client component communicate directly through the requested socket in user-mode.