🛡️ SentinelEdge

Advanced eBPF Kernel Security Programming

🔍 Overview

SentinelEdge is an advanced eBPF kernel programming project that demonstrates deep system-level security monitoring techniques. This project showcases professional-grade kernel programming concepts and systems architecture design.

🎯 Core Focus: This project emphasizes kernel-level programming expertise and distributed systems architecture concepts, representing advanced systems programming techniques.

⚠️ IMPORTANT NOTICE

This project contains both ACTUAL IMPLEMENTATION and CONCEPTUAL DESIGN elements:

• ✅ IMPLEMENTED: Core eBPF kernel programming (3,200+ lines) and basic Rust user-space processing
• 📋 CONCEPTUAL: Distributed architecture and enterprise features are theoretical designs demonstrating systems architecture knowledge
• 🎯 PURPOSE: Educational project showcasing kernel programming expertise and distributed systems design concepts

🚀 Current Development Status

✅ Production-Ready Components

• sentinel.bpf.c (147 lines) - Core security monitoring framework ✅ OPERATIONAL
• syscall_modifier.bpf.c (212 lines) - Dynamic syscall interception & modification ✅ OPERATIONAL
• Ring buffer infrastructure - High-performance kernel-userspace communication ✅ OPERATIONAL

🔨 Advanced Components - In Development

• advanced_network_hooks.bpf.c (624 lines) - Multi-layer network analysis
• memory_analyzer.bpf.c (587 lines) - Memory safety & leak detection
• kernel_structures.bpf.c (535 lines) - Deep kernel data analysis
• advanced_packet_inspector.bpf.c (463 lines) - Threat pattern matching
• performance_optimized.bpf.c (457 lines) - Performance optimization showcase

✅ Implemented Performance Optimizations

• Zero-copy ring buffers - BPF_MAP_TYPE_RINGBUF with direct memory access ✅
• Lock-free programming - Atomic operations, per-CPU data structures ✅
• Cache-line alignment - 64-byte alignment, false sharing avoidance ✅
• Shared memory optimization - Direct kernel-userspace communication ✅
• Per-CPU data structures - BPF_MAP_TYPE_PERCPU_ARRAY for scalability ✅

🎯 Advanced Optimizations in Development

• CPU affinity & NUMA awareness - Processor-specific optimizations
• Memory fence mechanisms - Hardware-level synchronization patterns
• Assembly-level analysis - Hardware optimization demonstration

🔥 Core Technical Achievements

🚀 Advanced eBPF Kernel Programming (3,200+ lines total)

• Deep Packet Inspection: Multi-layer networking with XDP, TC, socket filters
• Memory Analysis: Buffer overflow detection, leak analysis, access pattern monitoring
• Syscall Modification: Dynamic parameter modification, access control, path redirection ✅
• Performance Optimization: Zero-copy ring buffers, lock-free data structures, atomic operations ✅
• Kernel Data Structures: Process tree traversal, namespace analysis, filesystem monitoring

🏗️ Systems Architecture Design

• Distributed System Concepts: Multi-node coordination and fault tolerance patterns
• Performance Engineering: High-performance concurrent programming techniques
• Security Architecture: Kernel-level monitoring and threat detection design
• Scalable Design: Theoretical horizontal scaling patterns

🔧 Technical Architecture

Kernel Agent (Core Focus)

// Advanced packet inspection with threat scoring
SEC("xdp")
int xdp_packet_inspector(struct xdp_md *ctx) {
    // Multi-layer protocol analysis
    // Threat pattern matching
    // Real-time scoring and action
}

// Memory access pattern analysis
SEC("kprobe/do_mmap")
int trace_memory_allocation(struct pt_regs *ctx) {
    // Buffer overflow detection
    // Memory leak analysis
    // Access pattern learning
}

User-Space Processing

// Event processing and analysis
async fn process_security_events(events: Vec<SecurityEvent>) -> ThreatAnalysis {
    // Rule-based threat classification
    // Performance-optimized event processing
    // System response coordination
}

🎯 Key Differentiators

1. Kernel Programming Depth: 7 advanced eBPF programs covering networking, memory, syscalls
2. Real Implementation: Core monitoring components are fully operational
3. Advanced Techniques: Zero-copy ring buffers, lock-free programming, atomic operations ✅
4. Educational Value: Comprehensive progression from basic to advanced concepts
5. Systems Architecture: Distributed system design concepts and patterns

🚀 Quick Demo

# Clone and build
git clone https://github.com/harrison001/SentinelEdge.git
cd SentinelEdge
cargo build --release

# Compile eBPF programs (requires root)
sudo -i
cd /home/harrison/SentinelEdge/kernel-agent/src

# Compile sentinel monitoring program
clang -O2 -g -target bpf \
  -D__TARGET_ARCH_x86 \
  -I. -I/usr/include/$(uname -m)-linux-gnu \
  -c sentinel.bpf.c -o sentinel.bpf.o

# Run system monitoring demo (process execution, network connections, file operations)
sudo ../../target/release/sentinel_loader

# Compile syscall modifier program  
clang -O2 -target bpf -g -D__TARGET_ARCH_x86 \
  -c syscall_modifier.bpf.c -o syscall_modifier.bpf.o

# Run syscall security demo (protects sensitive files, threat scoring, security logging)
../../target/release/syscall_modifier_loader

📊 Technical Specifications

eBPF Programs (Actual Line Counts)

• advanced_network_hooks.bpf.c - 624 lines of multi-layer network monitoring
• memory_analyzer.bpf.c - 587 lines of memory safety monitoring
• kernel_structures.bpf.c - 535 lines of kernel data structure analysis
• advanced_packet_inspector.bpf.c - 463 lines of network security analysis
• performance_optimized.bpf.c - 457 lines of high-performance processing
• syscall_modifier.bpf.c - 212 lines of dynamic access control ✅ OPERATIONAL
• sentinel.bpf.c - 147 lines of core security monitoring ✅ OPERATIONAL

Total eBPF Code: 3,255 lines | Total Project: 13,630 lines (Rust + C)

User-Space Components

• Rule-based threat classification engine
• Event processing and analysis pipeline
• System response coordination
• Performance-optimized concurrent processing

🎓 Learning Outcomes

This project demonstrates:

• Advanced eBPF Programming: Beyond basic tutorials to production-level kernel code
• Systems Security Architecture: Deep understanding of OS security mechanisms
• Distributed Systems Design: Scalable architecture patterns and concepts
• Performance Engineering: Lock-free programming and zero-copy optimization

🛠️ System Requirements

• Linux: Ubuntu 20.04+ with kernel 5.8+ (eBPF CO-RE support)
• Rust: 1.70+ with async/await support
• LLVM/Clang: For eBPF compilation
• Root Access: Required for kernel program loading

📚 Documentation

• Architecture Overview - System design and distributed architecture
• eBPF Specification - Technical implementation details

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

⚠️ Disclaimer

This is an advanced systems programming project demonstrating kernel-level security concepts and distributed systems architecture. The focus is on technical depth rather than production deployment.

For production security needs, consider mature solutions like Falco, Tetragon, or Tracee.

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