Transmit/Receive - Data Sync Tool

Reliable and secure file transfer across networks using TCP protocol.
Experience seamless data synchronization with real-time monitoring and error-checked transfers.

            

Transmit-Receive is a C# application designed for reliable and secure file transfer across networks using the Transmission Control Protocol (TCP). This toolset includes two components: the Transmitter and the Receiver, which work together to exchange data between systems locally, across networks, or even over the internet. Both applications run on Windows and provide a user-friendly interface for reliable, orderly and error-checked file transfers with MD5 checksum verification. You can easily select files, specify target IP addresses, choose save locations and monitor transfer progress in real-time.

How It Works

1. Transmitter:

   • Enter the IP address of the target Receiver.
   • Select the files you want to send using the file browser.
   • File transfer starts automatically with progress monitoring and checksum verification.

2. Receiver:

   • Displays its IP address for easy sharing with Transmitter users.
   • Listens on port 1234 for incoming file transfers from any network location.
   • Reconstructs received packets, verifies file integrity, and saves to the specified directory.

In order to use Transmit-Receive, ensure you have .NET Framework 4.7.2 or higher installed on your system. You can build and run the application using Visual Studio 2022 or any compatible development environment.

Table of Contents

1. System Requirements
2. Network Configuration
3. Getting Started
   • Application: Receiver
   • Application: Transmitter
4. Connection Types
5. Troubleshooting
6. Copyright
7. Screenshots

System Requirements

• Operating System: Windows 7 or higher
• Framework: .NET Framework 4.7.2 or higher
• Architecture: x64 compatible
• Network: TCP connectivity on port 1234
• Permissions: Administrator privileges recommended

Network Configuration

• Default Port: 1234 (TCP)
• Connection Type: Local network, internet, or localhost
• Protocol: TCP (Transmission Control Protocol)
• Buffer Size: 8192 bytes
• Security: MD5 checksum verification for file integrity

Network Setup:

• Receiver automatically displays its IP address for easy connection setup
• Ensure Windows Firewall allows connections on port 1234
• For internet transfers, configure router port forwarding (port 1234) on the Receiver side
• Both applications support connections across different networks and the internet

Getting Started

Application: Receiver

1. Launch the Receiver Application:

   • Open the Receiver application. Once launched, it will automatically start listening on Port 1234 for incoming file transfers.
   • The application will display its IP address (e.g., "Server IP: 192.168.1.100:1234") in the message log.

2. Select a Save Location:

   • Click the Browse button to open a folder selection dialog.
   • Navigate to and choose the folder where you want to save incoming files.
   • After selecting the folder, the path will be displayed in the text box, indicating the destination for received files.

3. Share Your IP Address:

   • Provide the displayed IP address to users who want to send files to your system.

Application: Transmitter

1. Launch the Transmitter Application:

   • Start the Transmitter application. Your local IP address will be displayed for reference.

2. Enter Target IP Address:

   • In the top text field, enter the IP address of the Receiver you want to connect to.
   • This can be a local IP (e.g., 192.168.1.100), localhost (127.0.0.1), or an internet IP address.

3. Select and Send a File:

   • Click the Browse button to open a file selection dialog.
   • Navigate to and select the file you wish to send.
   • The file transfer will start automatically once a file is selected.
   • Monitor the transfer progress and wait for confirmation.

After the Receiver displays the message File received successfully, the file will be available in the selected save location with verified integrity.

Connection Types

Local Connection (Same Computer):

• IP Address: 127.0.0.1 or localhost

Local Network Connection:

• IP Address: Local network IP (e.g., 192.168.1.100)
• Both devices must be on the same network

Internet Connection:

• IP Address: Public IP address of the Receiver
• Requires port forwarding configuration on the Receiver's router
• Firewall rules must allow incoming connections on port 1234

Important: Make sure to run both applications as an administrator. Otherwise, Windows might block the file transfers, causing the applications not to work properly.

Troubleshooting

Connection Issues:

• Verify the IP address is entered correctly in the Transmitter
• Ensure the Receiver is running and displays "Listening for connections..."
• Check Windows Firewall settings for port 1234
• For internet connections, verify port forwarding is configured correctly

File Transfer Errors:

• Run both applications as administrator
• Ensure sufficient disk space at the destination
• Check file permissions for both source and destination folders
• Verify network stability for large file transfers

Application Not Responding:

• Restart the Receiver application first, then the Transmitter
• Verify .NET Framework 4.7.2 is properly installed
• Check Windows Event Viewer for detailed error messages

Network Connectivity:

• Test basic network connectivity between machines (ping command)
• Ensure TCP port 1234 is not blocked by antivirus software
• For internet transfers, verify the public IP address is accessible
• Check if VPN or proxy settings interfere with the connection

IP Address Issues:

• Use the IP address displayed by the Receiver application
• For internet connections, use the public IP address, not the local one
• Ensure the target device is reachable from your network location

Copyright

Transmit-Receive is licensed under the MIT License. You are granted permission, free of charge, to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of this project and its associated documentation files, under the following conditions:

1. Copyright Notice: The above copyright notice and this permission notice must be included in all copies or substantial portions of the project.

2. Attribution: If you use this project, you should credit the original creator in your work, documentation, or any materials that incorporate or use this project. Additionally, please include a link to the original repository created by the author when giving attribution.

3. No Warranty: This project is provided "as is," without any warranties, whether express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, or non-infringement. In no case shall the author or copyright holder be liable for any claims, damages, or other liabilities, whether in a contract, tort, or otherwise, arising from the use of this project or any other dealings with the Software.

For complete license details, please refer to the MIT License.

Screenshots

If you're curious about what the Transmitter and Receiver applications look like before downloading, take a look at the screenshots below. These images provide a visual preview of the software's appearance.

Receiver Application

Transmitter Application