CTP — Custom Transport Protocol

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CTP, is a frame-based custom transport protocol implemented in pure C. This project simulates reliable serial communication over virtual or real serial ports, including frame creation, CRC error detection, and ACK/NACK based retransmission.

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🌟 Features

Protocol Feature	CAP Implementation
Frame Structure	Each frame has preamble, sequence number, payload, and CRC
CRC Error Detection	Detects transmission errors using binary CRC
ACK/NACK Reliability	Receiver sends ACK/NACK; sender retransmits if needed
Virtual Serial Communication	Uses socat to simulate connected serial ports
Termios Integration	Configures serial ports, baud rate, character size, and blocking mode
Simple Data Transfer	Send arbitrary payloads reliably over serial

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🚀 Getting Started

Requirements

• GCC / C compiler
• Unix-based OS (Linux, macOS)
• socat (for virtual serial port testing)
• make

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🔧 Build

cd ctp
socat -d -d pty,raw,echo=0,link=/tmp/sender pty,raw,echo=0,link=/tmp/receiver
make
make run-receiver
make run-sender

CTP Architecture

Readmore here: CTP Blog

🤝 Contributing

We ❤️ contributors!

To contribute:

1. Fork the repository.
2. Clone it locally:

   git clone [repo]
   cd ctp
   git checkout -b feature/my-improvement

License

@Meerthika