Local Network File Transfer

Simple command-line file transfer tool that uses mDNS for device discovery on local networks.

Features

• Automatic peer discovery using mDNS/Bonjour
• Real-time transfer progress display
• No configuration needed - just run and transfer
• Supports files of any size
• Simple command-line interface

Prerequisites

• Go 1.25 or higher
• Local network that allows mDNS traffic
• Firewall access for ports 24242 (discovery) and 24243 (transfer)

Installation

git clone https://github.com/tkalum/file-Tranfer.git
cd file-Tranfer
go build ./cmd/file-transfer

Usage

Send a file

./file-transfer -s filename.txt

The sender will:

1. Announce its presence on the network
2. Wait for a receiver to connect
3. Display transfer progress

Receive a file

./file-transfer

The receiver will:

1. Search for available senders on the network
2. Connect to the first discovered sender
3. Save received file with "receive_" prefix
4. Show download progress

Technical Details

• Discovery Protocol: mDNS (Bonjour)
• Service Name: _filetransfer._tcp
• Discovery Port: 24242
• Transfer Port: 24243
• Transfer Buffer: 64KB chunks

Troubleshooting

• Ensure both devices are on the same local network
• Check firewall settings if devices can't discover each other
• Look for files with "receive_" prefix in the working directory
• Make sure ports 24242 and 24243 are not in use

Notes

• Files are saved in the current working directory
• Transfer speed depends on local network performance
• Large files are supported but may take longer to transfer
• Only one file can be transferred at a time