https://github.com/utkarsh5026/dngo

A short and simple DNS server implementation written in Golang
https://github.com/utkarsh5026/dngo

codecrafters codecrafters-dns-server dns dns-server golang

Last synced: 1 day ago
JSON representation

A short and simple DNS server implementation written in Golang

• Host: GitHub
• URL: https://github.com/utkarsh5026/dngo
• Owner: utkarsh5026
• Created: 2024-08-02T11:49:42.000Z (6 months ago)
• Default Branch: master
• Last Pushed: 2025-01-04T22:55:55.000Z (21 days ago)
• Last Synced: 2025-01-04T23:26:13.147Z (21 days ago)
• Topics: codecrafters, codecrafters-dns-server, dns, dns-server, golang
• Language: Go
• Homepage:
• Size: 23.4 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# 🌐 DNS Server Implementation

[![progress-banner](https://backend.codecrafters.io/progress/dns-server/2204d057-36c3-40cf-81ea-892532c3fbb6)](https://app.codecrafters.io/users/codecrafters-bot?r=2qF)

## 📝 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