check_connection

#!/bin/bash
check_internet_connection() {
  return $(ping -c 1 www.google.com > /dev/null)
}

while [ 1 ]; do
  check_internet_connection
  # already have internet connection
  if [ $? -eq 0 ]; then
    echo "$(date +%Y-%m-%d\ %H:%M:%S) "internet connection state online"
    sleep 10
  else
    echo "$(date +%Y-%m-%d\ %H:%M:%S) lost internet connection, auto reconnect..."
    #check active network devices
    #nmcli conn show --active
    DID1=$(sudo nmcli conn show --active|grep ethernet|awk '{print $(NF-2)}')
    DNAME1=$(sudo nmcli conn show --active|grep ethernet|awk '{print $(NF-0)}')
    #nmcli con down $(nmcli conn show --active|grep ethernet|awk '{print $(NF-2)}')
    #release ip
    sudo dhclient -v -r $DNAME1
    #try to obtain a new ip
    sudo dhclient -v $DNAME1
    # disables the network device
    sudo nmcli con down $DID1
    sleep 5
    # enables the network device
    sudo nmcli con up $DID1
    nmcli device reapply $DNAME1
    sudo nmcli conn show --active
    sleep 3
    #restarts anydesk
    sudo killall anydesk
    sleep 1
    sudo systemctl start anydesk
    sleep 1
    sudo anydesk --restart-service
    sleep 2
    sudo anydesk --get-status && echo && sudo anydesk --get-id && echo
    sleep 10
  fi
done