run.sh

#!/bin/bash

set -e

if [ -f .env ]; then 
    export $(grep -v '#' .env | xargs)
else
    echo ".env file not found!"
    exit 1
fi

cleanup() {
	sudo ip link set down dev tun0 || true
	sudo ip tuntap del dev tun0 mode tun || true
}

# cleaning up
trap cleanup EXIT

# Build the Rust project
cargo b --release

ext=$?
if [[ $ext -ne 0 ]]; then
    echo "$ext"
fi

# Create tun0 interface if it doesn't exist
if ! ip link show tun0 > /dev/null 2>&1; then
    sudo ip tuntap add dev tun0 mode tun
fi

# Set capabilities for the binary
sudo setcap cap_net_admin=eip "$CARGO_TARGET_DIR"/release/rfc793

# Run the binary in the background
"$CARGO_TARGET_DIR"/release/rfc793 &
RUST_PROCESS_ID=$!

# Configure the tun0 interface if the IP address is not already assigned
if ! ip addr show tun0 | grep -q "192.168.0.1/24"; then
    sudo ip addr add 192.168.0.1/24 dev tun0
fi
sudo ip link set up dev tun0

# Wait for the Rust process to exit
wait $RUST_PROCESS_ID