🌐 DNS Server Implementation

📝 Introduction

A modern DNS server implementation that provides:

• 📦 RFC 1035-compliant DNS packet handling
• 🔄 Efficient query resolution
• 📋 Support for common record types (A, AAAA)
• 🔍 Smart recursive resolution with forwarding
• 🗜️ Optimized message compression

✨ Key Features

• 🔍 DNS Packet Parsing: Robust implementation of DNS packet structures including headers, questions, and answers
• 📋 Record Types Support:
  • A Records (IPv4 addresses)
  • AAAA Records (IPv6 addresses)
• 🔄 Recursive Resolution: Intelligent query forwarding to upstream DNS servers
• ⚠️ Error Handling: Comprehensive handling of DNS error conditions
• 🗜️ Message Compression: Smart DNS message compression for optimal performance

🔧 Core Components

1. 📝 DNS Header Processing

   • Efficient 12-byte header handling
   • Robust query/response identification
   • Comprehensive flag management (AA, TC, RD, RA)

2. ❓ Question Section

   • Intelligent domain name parsing
   • Flexible query type handling
   • Full class code support

3. ✅ Answer Section

   • Clean Resource Record (RR) formatting
   • Smart TTL management
   • Precise data length handling
   • Type-specific data formatting

4. 🔍 Name Resolution

   • Efficient label compression
   • Reliable pointer handling
   • Optimized domain name processing

🎯 Summary & Roadmap

This implementation offers a solid foundation for DNS operations with a focus on reliability and extensibility.

🔜 Future Enhancements

• 🔒 DNSSEC implementation
• 🌐 Extended record type support (MX, TXT, etc.)
• ⚡ Performance optimizations
• 📊 Monitoring and metrics integration