LinuxGSM/lgsm/functions/check_ip.sh

#!/bin/bash
# LinuxGSM check_ip.sh module
# Author: Daniel Gibbs
# Contributors: http://linuxgsm.com/contrib
# Website: https://linuxgsm.com
# Description: Automatically identifies the server interface IP.
# If multiple interfaces are detected the user will need to manually set using ip="0.0.0.0".

functionselfname="$(basename "$(readlink -f "${BASH_SOURCE[0]}")")"

info_config.sh
info_parms.sh

if [ ! -f "/bin/ip" ]; then
	ipcommand="/sbin/ip"
else
	ipcommand="ip"
fi
getip=$(${ipcommand} -o -4 addr | awk '{print $4}' | grep -oe '\([0-9]\{1,3\}\.\?\)\{4\}' | sort -u | grep -v 127.0.0)
getipwc=$(${ipcommand} -o -4 addr | awk '{print $4}' | grep -oe '\([0-9]\{1,3\}\.\?\)\{4\}' | sort -u | grep -vc 127.0.0)

# Check if server has multiple IP addresses

# If the IP variable has been set by user.
if [ -n "${ip}" ]&&[ "${ip}" != "0.0.0.0" ]; then
	queryips=( "${ip}" )
	webadminip=( "${ip}" )
	telnetip=( "${ip}" )
# If game config does have an IP set.
elif [ -n "${configip}" ]&&[ "${configip}" != "0.0.0.0" ];then
	queryips=( "${configip}" )
	ip="${configip}"
	webadminip=( "${configip}" )
	telnetip=( "${configip}" )
# If there is only 1 server IP address.
# Some IP details can automaticly use the one IP
elif [ "${getipwc}" == "1" ]; then
	queryips=( $(echo "${getip}") )
	ip="0.0.0.0"
	webadminip=( "${getip}" )
	telnetip=( "${getip}" )
# If no ip is set by the user and server has more than one IP.
else
	queryips=( $(echo "${getip}") )
	ip="0.0.0.0"
	webadminip=( "${ip}" )
	telnetip=( "${ip}" )
fi