Case Studies

Development of Change Detection System using Linux C/C , Kernel Space programming, & User Space Programming.

The Client:
Portland, Oregon based leading software product company.

The Challenge:
The client needed a driver that could:

• Communicate with external auditing agent to get rules for change detection
• Capture Linux file system events
• Validate the captured events against the rules
• Report the validated events to external auditing agent
• Run on RHEL 3, 4, 5 Linux, with 32-bit as well as 64-bit OS
• The CPU usage of this driver during heavy file I/O not to exceed 5%
• Support SMP

The Solution:
While developing change detecting system we used Layered architecture to ensure low coupling, high scalability and easy maintenance. Also we specially Developed Daemon that:

• Registers with the kernel to receive file system change events.
• Creates socket for communication.
• Starts the IPC thread to handle external auditing agent request.

Design Highlights:

Supported Linux Distributions:

Best Practices and Standards:

• Versioning of source code for history management
• Source control server does not contain partial code
• Industrial guidelines for standards and best practices are strictly followed
• Code reviews
• Stress test, performance test

Technology:

• C, Linux
• Kernel Space programming
• User Space Programming

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