Mac OS X – Get Network Information

Every once in a while you need to get some basic network information from your Mac or a Mac you are supporting, this script below will help get you some helpful information.

#!/bin/sh

clear

sExternalMACALService="http://dns.kittell.net/macaltext.php?address="

# List all Network ports
NetworkPorts=$(ifconfig -uv | grep '^[a-z0-9]' | awk -F : '{print $1}')
#echo $NetworkPorts

# Function to convert IP Subnet Mask to CIDR
mask2cdr ()
{
    # Assumes there's no "255." after a non-255 byte in the mask
    local x=${1##*255.}
    set -- 0^^^128^192^224^240^248^252^254^ $(( (${#1} - ${#x})*2 )) ${x%%.*}
    x=${1%%$3*}
    echo $(( $2 + (${#x}/4) ))
}

# Get remote/public IP address
remoteip=$(dig +short myip.opendns.com @resolver1.opendns.com)

# Get computer name
computername=$(scutil --get ComputerName)

# Get serial number
sSerialNumber=$(system_profiler SPHardwareDataType |grep "Serial Number (system)" |awk '{print $4}'  | cut -d/ -f1)
#echo $sSerialNumber

# Get operating system name and version - Start
OSvers1=$( sw_vers -productVersion | cut -d. -f1 )
OSvers2=$( sw_vers -productVersion | cut -d. -f2 )
OSvers3=$( sw_vers -productVersion | cut -d. -f3 )
case $OSvers2 in
    8)
        OSName="Mountain Lion"
    ;;
    9)
        OSName="Mavericks"
    ;;
    10)
        OSName="Yosemite"
    ;;
    11)
        OSName="El Capitan"
    ;;
    12)
        OSName="Sierra"
    ;;
    default)
        OSName="Unknown"
    ;;
esac
# Get operating system name and version - Stop

echo "$computername"
echo "--------------"
echo "      Computer OS:  Mac OS X - $OSName $OSvers1.$OSvers2.$OSvers3"
echo "    Computer Name:  $computername"
echo "Current User Name:  $(whoami)"
echo "    Serial Number:  $sSerialNumber"

if [[ $remoteip ]]; then
    echo "Remote IP Address:  $remoteip\n"
else
    echo "Remote IP Address:  Unable To Determine\n"
fi

for val in $(echo $NetworkPorts); do   # Get for all available hardware ports their status
    activated=$(ifconfig -uv "$(echo $val)" | grep 'status: ' | awk '{print $2}')
    #echo $activated

    if [ "$activated" == "active" ]; then
        label=$(ifconfig -uv "$(echo $val)" | grep 'type' | awk '{print $2}')
        #echo $label
        #ActiveNetwork=$(route get default | grep interface | awk '{print $2}')
        ActiveNetworkName=$(networksetup -listallhardwareports | grep -B 1 "$label" | awk '/Hardware Port/{ print }'|cut -d " " -f3- | uniq)
        #echo $ActiveNetwork
        #echo $ActiveNetworkName
        state=$(ifconfig -uv "$val" | grep 'status: ' | awk '{print $2}')
        #echo $state
        ipaddress=$(ifconfig -uv "$val" | grep 'inet ' | awk '{print $2}')
        # echo $ipaddress

        if [[ -z $(ifconfig -uv "$val" | grep 'link rate: ' | awk '{print $3, $4}' | sed 'N;s/\n/ up /' ) ]]; then
            networkspeed="$(ifconfig -uv "$val" | grep 'link rate: ' | awk '{print $3}' ) up/down"
        else
            networkspeed="$(ifconfig -uv "$val" | grep 'link rate: ' | awk '{print $3, $4}' | sed 'N;s/\n/ up /' ) down"
        fi

        #echo $networkspeed
        macaddress=$(ifconfig -uv "$val" | grep 'ether ' | awk '{print $2}')
        #echo $macaddress
        macal=$(curl -s "$sExternalMACALService$macaddress")
        #echo $macal
        quality=$(ifconfig -uv "$val" | grep 'link quality:' | awk '{print $3, $4}')
        #echo $quality
        netmask=$(ipconfig getpacket "$val" | grep 'subnet_mask (ip):' | awk '{print $3}' | tr -d '[:space:]')
        #echo $netmask
        router=$(ipconfig getpacket "$val" | grep 'router (ip_mult):' | sed 's/.*router (ip_mult): {\([^}]*\)}.*/\1/')
        #echo $router
        DHCPActive=$(networksetup -getinfo "Wi-Fi" | grep DHCP)
        #echo $DHCPActive
        dnsserver=$(networksetup -getdnsservers "$ActiveNetworkName" | awk '{print $1, $2}' | sed 'N;s/\n//' )
        #echo $dnsserver

        if [[ ! -z "$netmask" ]]; then
            echo "Network Port is Active"
            if [[ $ipaddress ]]; then
                echo "$ActiveNetworkName ($val)"
                echo "--------------"

                # Is this a WiFi associated port? If so, then we want the network name
                if [ "$label" = "Wi-Fi" ]; then
                    WiFiName=$(/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -I | grep '\sSSID:' | sed 's/.*: //')
                    #echo $WiFiName
                    echo "     Network Name:  $WiFiName"
                fi

                echo "       IP Address:  $ipaddress"
                echo "      Subnet Mask:  $netmask"
                echo "           Router:  $router"
                echo "          IP CIDR:  $ipaddress/$(mask2cdr $netmask)"

                if [[ -z $dnsserver ]]; then
                    if [[ $DHCPActive ]]; then
                        echo "       DNS Server:  Set With DHCP"
                    else
                        echo "       DNS Server:  Unknown"
                    fi
                else
                    echo "       DNS Server:  $dnsserver"
                fi

                echo "      MAC-address:  $macaddress ($macal)"
                echo "    Network Speed:  $networkspeed"
                echo "     Link quality:  $quality"
                echo " "
            fi

            # Don't display the inactive ports.
        fi
    fi
done