nagios plugins for check remote port status

#!/bin/bash


alertC=""
monitor_type=""
iftype=false
check_ip=""

usage()
{
cat << EOF
Usage:$(basename $0) options

This script use for test zte server status

OPTIONS:
    -H, IP address
    -h Show this message
    -c NUM set any value of CRITICAL
    <-p | -s> -s check SMPP port, -p check POST port
EOF
}

typeusage()
{
    echo "Can't specify 's' and 'h' at the same time!!!"
    exit 1
}


while getopts "w:c:sphH:" opt;do
    case $opt in
        'H')
            check_ip=$OPTARG
            ;;
        'h')
            usage
            exit 0
            ;;
        'c')
            alertC=$OPTARG
            ;;
        'p')
            if ! $iftype; then
                monitor_type="http"
                iftype=true
            else
                typeusage
            fi
            ;;
        's')
            if ! $iftype; then
                monitor_type="smpp"
                iftype=true
            else
                typeusage
            fi
            ;;
        *)
            echo usage
            ;;
    esac
done

[ -z $check_ip ] && echo "Must specify a address" && exit 0

case $monitor_type in
    'http')
        if nc -w 5 -z $check_ip 7002 &>/dev/null ;then
            echo "HTTP OK: HTTP check was ok"
            exit 0
        else
            echo "HTTP CRITICAL: HTTP check was failed"
            exit 2
        fi
            ;;
    'smpp')
        if nc -w 5 -z $check_ip 3200 &>/dev/null ;then
            echo "SMPP OK: SMPP check was ok"
            exit 0
        else
            echo "SMPP CRITICAL: SMPP check was failed"
            exit 2
        fi
            ;;
esac