A comprehensive collection of network protocol implementations and server applications built from scratch to demonstrate core networking concepts and server-side programming.
This repository contains implementations of various network protocols and server applications, each built to understand the fundamental mechanics of network communication without relying on high-level libraries or frameworks.
cgi-scripts/ - Common Gateway Interface programs for server-side execution and dynamic web content generation
- Time zone display applications
- Dynamic content generation
- Backend file manipulation
ftp-server/ - File Transfer Protocol server implementation
- Control and data connection handling
- File upload/download capabilities
- Multi-client support
http-server/ - HTTP server supporting static file serving, dynamic content generation, and form processing
- Custom routing mechanisms
- Calculator web application interface
ldap-389/ - Lightweight Directory Access Protocol client implementation
- Directory Information Tree queries
- Binary message encoding/decoding
- Authentication and search operations
pop3-server/ - Post Office Protocol 3 server for email retrieval
- Email message management
- User authentication
- Message deletion and retrieval
smtp-server/ - Simple Mail Transfer Protocol server implementation
- Email sending capabilities
- SMTP command processing
- Message queuing and delivery
telnet/ - Telnet server implementation
- Remote terminal access
- ANSI escape sequence support
- Multi-user capabilities
- Socket-level programming using raw sockets
- Protocol compliance with RFC specifications
- No high-level networking libraries
- Server-side focus with multi-threaded architectures
- Binary and text protocol handling
- Custom message parsing and generation
- Cross-platform compatibility
- Comprehensive error handling
- Linux/Unix environment
- GCC compiler
- Apache web server (for CGI components)
- OpenLDAP server (for LDAP components)
- Clone the repository
- Navigate to individual project directories
- Compile using provided Makefiles
- Configure server settings as needed
- Deploy to appropriate server directories
Each component includes specific configuration files and setup instructions.
- HTTP/1.1 with CGI support
- FTP with active/passive modes
- SMTP for email transmission
- POP3 for email retrieval
- LDAP for directory services
- Telnet for remote terminal access
These implementations are designed for educational purposes and protocol understanding. They may not include production-level security features.
Feel free to explore the notes and practicals to enhance your understanding of the OSI model and its applications in real-world networking scenarios. For any questions or further clarifications, please refer to the contact section in the main repository README file.