IP Address Changer

This project allows users to change their internet IP address by reconnecting to a dynamic IP provider. The client application listens for a hotkey (Ctrl + Shift + S) and sends a request to the server to initiate the reconnection process. The server performs the necessary commands to disconnect and reconnect the network interface, then retrieves the new IP address.

Features

• Automatically reconnects the specified network interface.
• Displays notifications about the old and new IP addresses.
• Logs the process to a file.
• Supports dynamic IP changes from a variety of external IP services.

Server-Side Instructions

Building the Server

To build the server application, use the following command in the terminal:

GOOS=linux GOARCH=arm64 go build -o ip_changer_server /server/main.go

Copy the executable file

Move the executable file of your ip_changer_server application to the /opt/ip_changer/ directory on your OpenWRT router. Make sure the directory exists, and if not, create it:

mkdir -p /opt/ip_changer/
scp /path/to/ip_changer_server root@<192.168.1.1>:/opt/ip_changer/

Create the service

Create a service file /etc/init.d/ip_changer and add the following code to it:

#!/bin/sh /etc/rc.common

START=99  
STOP=10   

PROG_NAME="ip_changer"
PROG_PATH="/opt/ip_changer/ip_changer_server" 

start() {
    echo "Start $PROG_NAME..."
    $PROG_PATH &
}

stop() {
    echo "Stop $PROG_NAME..."
    kill $(pgrep -f $PROG_NAME)
}

restart() {
    stop
    start
}

boot() {
    start
}

Make the file executable

Make sure the service file has execute permissions:

chmod +x /etc/init.d/ip_changer

And also the application itself

chmod +x /opt/ip_changer/ip_changer_server

Add the service to autorun

Enable autorun for your service:

/etc/init.d/ip_changer enable

If the error ': No such file or directory.common occurs, here is solution

Start the service

Start the service manually:

/etc/init.d/ip_changer start

Now your application will automatically start when the router boots up and you can control it with the start, stop, and restart commands.

Client-Side Instructions

Dependencies

Make sure you have the following Go packages installed:

go get github.com/gen2brain/beeep
go get golang.design/x/hotkey

Building the Client

To build the client application, use the following command in the terminal:

go build -buildmode=exe -o ip-changer-client.exe /client/main.go 

Use

Hotkey mode (Default)

Run the client normally to activate background mode with hotkey support (Ctrl + Shift + S):

./ip-changer

This will:

• Run in the background
• Listen for Ctrl + Shift + S
• Trigger the IP change
• Show a system notification

CLI Mode

You can also run commands directly from the command line:

./ip-changer cli reconnect

This will:

• Send an immediate reconnect request
• Wait for a response
• Show a notification with old and new IPs
• This is useful for scripting or creating your own hotkeys (e.g. with Hyprland, i3, etc.)