pingcheck v4

root@OpenWrt:~# cat /etc/config/network | grep endpoint_host
        option endpoint_host 'sg494.nordvpn.com'
@@@@@@@@@@@@@@@@@@@@@@
root@OpenWrt:~# ping -I nordlynx google.com
PING google.com (172.217.31.14): 56 data bytes
64 bytes from 172.217.31.14: seq=0 ttl=114 time=74.798 ms
64 bytes from 172.217.31.14: seq=1 ttl=114 time=74.787 ms
64 bytes from 172.217.31.14: seq=2 ttl=114 time=74.573 ms
^C
--- google.com ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 74.573/74.719/74.798 ms
@@@@@@@@@@@@@@@@@@@@@@
root@OpenWrt:~# ping -I br-lan google.com
PING google.com (172.217.31.14): 56 data bytes
64 bytes from 172.217.31.14: seq=0 ttl=117 time=27.894 ms
64 bytes from 172.217.31.14: seq=1 ttl=117 time=27.514 ms
64 bytes from 172.217.31.14: seq=2 ttl=117 time=27.737 ms
^C
--- google.com ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 27.514/27.715/27.894 ms
@@@@@@@@@@@@@@@@@@@@@@
root@OpenWrt:~# cat ./pingv4.sh
#!/bin/sh

check_ping () {
  server="$1"
  interface="$2"
  count=0
  while [ "$count" -lt 5 ]; do
    ping_output=$(ping "$server" -c 1 -I "$interface" -W 5)
    ping_time=$(printf "%.0f" "$(echo "$ping_output" | grep 'time=' | awk -F 'time=' '{print $2}' | awk '{print $1}')")
    if [ -n "$ping_time" ] && [ "$ping_time" -gt 0 ]; then
      break
    fi
    count=$((count+1))
    sleep 1
  done
}

find_fastest_server () {
  server_list="/etc/servers"
  fastest_ping=100
  fastest_server=
  interface="br-lan"
  while IFS= read -r server; do
    echo "Checking server: $server"
    check_ping "$server" "$interface" &>/dev/null
    if [ "$ping_time" -lt "$fastest_ping" ]; then
      fastest_server="$server"
      fastest_ping="$ping_time"
    fi
  done < "$server_list"
}

ifname="nordlynx"
echo "Pinging..."
check_ping "8.8.8.8" "$ifname" &>/dev/null
echo "Current ping: $ping_time"

# Check if VPN ping is lower than 50ms
if [ "$ping_time" -eq 0 ] || [ "$ping_time" -lt 10 ]; then
  exit 0
else
  find_fastest_server
  echo "Fastest server: $fastest_server"
  echo "Fastest ping: $fastest_ping ms"
  # If there is no error left, remove this line and all # at the beginning of the 3 following lines
  #uci set network.@wireguard_${ifname}[-1].endpoint_host="$fastest_server"
  #uci commit network
  #/etc/init.d/network restart
fi

exit 0
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root@OpenWrt:~# ./pingv4.sh
Pinging...
Current ping: 39
Checking server: sg491.nordvpn.com
Checking server: sg493.nordvpn.com
Checking server: sg494.nordvpn.com
Checking server: sg455.nordvpn.com
Checking server: sg508.nordvpn.com
Checking server: sg456.nordvpn.com
Checking server: sg507.nordvpn.com
Checking server: sg490.nordvpn.com
Checking server: sg459.nordvpn.com
Checking server: sg460.nordvpn.com
Checking server: sg457.nordvpn.com
Checking server: sg461.nordvpn.com
Checking server: sg462.nordvpn.com
Checking server: sg463.nordvpn.com
Checking server: sg458.nordvpn.com
Fastest server: sg491.nordvpn.com
Fastest ping: 29 ms
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root@OpenWrt:~# cat /etc/config/network | grep endpoint_host
        option endpoint_host 'sg494.nordvpn.com'
root@OpenWrt:~#