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dotfiles/.scripts/network_utilities.sh

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# network utility functions
# get the ip address of the host
function get_local_ip() { echo -e "The interfaces and IPs are:\n$(ip -o -4 addr show | awk '/inet 192.168|inet 10.|inet 172.16/ {split($4, a, "/"); print $2 ": " a[1] "\n"}')"
}
function get_public_ip() {
public_ip=$(curl -s canhazip.com)
echo -e "The public IP is: $public_ip"
}
function is_dns_working() {
dns_working=$(ping -4 -c 1 google.com | grep "1 received" | wc -l)
if [ $dns_working -eq 1 ]; then
return 0
else
return 1
fi
}
function reconnect_vpn_on_dns_failure() {
# reconnect vpn if dns is not working
if ! is_dns_working; then
echo "DNS is not working, reconnecting VPN"
mullvad reconnect
echo $(mullvad status)
else
echo "DNS is working, no need to reconnect VPN"
fi
}
function check_internet_speed() {
# check if user has permissions to /var/log
if [ ! -w /var/log ]; then
echo "Permissions to /var/log are not available"
echo "Resorting to home directory for log file"
logfile=~/speedtest.log
else
echo "Permissions to /var/log are available"
logfile=/var/log/speedtest.log
fi
# make sure dns is working properly
reconnect_vpn_on_dns_failure
# add time and date to logfile
echo -e "\n\n$(date)" >> $logfile
echo "Running speedtest"
SpeedTest | tee -a $logfile
echo "Speedtest complete"
}