CTP — Custom Transport Protocol

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.

🌟 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

🚀 Getting Started

Requirements

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

🔧 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:

Fork the repository.

Clone it locally:

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

License

@Meerthika

License

RootSprout/CTP

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