Update youtube routes

update-youtube-routes.sh

#!/bin/sh
# Script to update YouTube IP ranges and set up routing

# Create YouTube domains file if it doesn't exist
if [ ! -f /config/youtube_domains.txt ]; then
  cat > /config/youtube_domains.txt << EOF
youtube.com
youtu.be
ytimg.com
yt3.ggpht.com
googlevideo.com
yt.be
youtubei.googleapis.com
youtube-nocookie.com
EOF
fi

# Get the VPN Gateway IP from gluetun API
VPN_GATEWAY=$(curl -s http://localhost:8023/v1/openvpn/status | grep -oP '(?<="gateway":")[^"]*')
if [ -z "$VPN_GATEWAY" ]; then
  echo "Failed to get VPN gateway from gluetun API"
  exit 1
fi
echo "VPN Gateway: $VPN_GATEWAY"

# Create the routing script for iptables
cat > /config/routing.sh << EOF
#!/bin/sh
# Set up iptables for YouTube domains
iptables -t nat -F YOUTUBE_PREROUTING 2>/dev/null || iptables -t nat -N YOUTUBE_PREROUTING
iptables -t nat -F YOUTUBE_OUTPUT 2>/dev/null || iptables -t nat -N YOUTUBE_OUTPUT

# Delete any existing references to our chains
iptables -t nat -D PREROUTING -j YOUTUBE_PREROUTING 2>/dev/null
iptables -t nat -D OUTPUT -j YOUTUBE_OUTPUT 2>/dev/null

# Add our chains to the main tables
iptables -t nat -A PREROUTING -j YOUTUBE_PREROUTING
iptables -t nat -A OUTPUT -j YOUTUBE_OUTPUT

# Add specific YouTube domains - IP mapping from resolved domains
EOF

# Resolve each domain and add to routing script
for domain in $(cat /config/youtube_domains.txt); do
  echo "Resolving domain: $domain"
  IPs=$(getent hosts $domain | awk '{ print $1 }')
  
  if [ -z "$IPs" ]; then
    # Try with nslookup as fallback
    IPs=$(nslookup $domain | grep Address | grep -v '#' | awk '{ print $2 }')
  fi
  
  if [ -n "$IPs" ]; then
    for ip in $IPs; do
      echo "iptables -t nat -A YOUTUBE_PREROUTING -d $ip -j DNAT --to-destination $VPN_GATEWAY" >> /config/routing.sh
      echo "iptables -t nat -A YOUTUBE_OUTPUT -d $ip -j DNAT --to-destination $VPN_GATEWAY" >> /config/routing.sh
    done
  else
    echo "WARNING: Could not resolve IPs for $domain"
  fi
done

# Make the script executable
chmod +x /config/routing.sh

# Run the routing script
/config/routing.sh

echo "YouTube routing setup complete"