108 lines
3.4 KiB
Bash
108 lines
3.4 KiB
Bash
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usage="$(basename "$0") [OPTIONS] -- program to retrieve network devices and show IP address paired with the device name
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where:
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-h show this help text
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-i set the IP interface to check (default: 1) - check available IPs list with [-l] option
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-l list the available IP addresses
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-a show all network IPs, even if no computer name is found
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-m show MAC address
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-b show devices brand when no other information is available (if nmap installed and if can be found)"
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myip=1
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shownoname=false
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showmac=false
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showbrand=false
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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ORANGE='\033[0;33m'
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NC='\033[0m'
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while getopts ':halmbi:' option; do
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case "$option" in
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h) echo "$usage"
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exit 0
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;;
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a) shownoname=true
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;;
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l) sudo nm-tool | grep -i 'address' | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | nl -n 'ln'
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exit 0
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;;
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m) showmac=true
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;;
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b) showbrand=true
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;;
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i) myip=$OPTARG
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if [ -z $(sudo nm-tool | grep -i 'address' | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | sed -n "$myip"p) ]; then
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echo "there is no such interface, try the [-l] option"
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exit 1
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fi
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;;
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:) printf "missing argument for -%s\n" "$OPTARG" >&2
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exit 1
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;;
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\?) printf "illegal option: -%s\n" "$OPTARG" >&2
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exit 1
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;;
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esac
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done
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shift $((OPTIND - 1))
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# get if nmap is installed
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nmapInstalled=$(whereis nmap)
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if [ -z "$nmapInstalled" ]; then
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showbrand=false
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fi
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maxwait=0.1;
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# get starter IP address
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IFS=. read -r i1 i2 i3 i4 <<< $(sudo nm-tool | grep -i 'address' | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | sed -n "$myip"p)
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IFS=. read -r m1 m2 m3 m4 <<< $(sudo nm-tool | grep -i 'prefix' | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | sed -n "$myip"p)
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si1=$(($i1 & $m1))
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si2=$(($i2 & $m2))
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si3=$(($i3 & $m3))
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si4=$(($i4 & $m4))
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# get my HW address
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myhwaddr=$(ifconfig | grep -B 1 "$i1.$i2.$i3.$i4" | grep -oP '([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})' | sed -n "$myip"p)
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# get number of IPs in network
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iprange=$(sudo nm-tool | grep -i 'prefix' | grep -Po '\s[0-9]+' | grep -Po '[0-9]+' | sed -n "$myip"p)
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iprange=$(( 2**(32-$iprange) -1 ))
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# cycle through IPs
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for((i=1;i<$iprange;i++)); do
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# calulate IP
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ci4=$(($si4 + $i))
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ci3=$(($si3 + ($ci4 / 256) )); ci4=$(($ci4 % 256))
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ci2=$(($si2 + ($ci3 / 256) )); ci3=$(($ci3 % 256))
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ci1=$(($si1 + ($ci2 / 256) )); ci2=$(($ci2 % 256))
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# get computer name
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result=$(timeout $maxwait nmblookup -A "$ci1.$ci2.$ci3.$ci4" | sed -n 2p | grep -Po '\t.+?\s' | xargs)
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hwaddress=$(arp "$ci1.$ci2.$ci3.$ci4" | grep -Po '([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})')
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if [ -z "$result" ] && [ ! -z "$hwaddress" ] && [ $shownoname == true ]; then
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result="???"
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fi
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# print if response given
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if [ ! -z "$result" ]; then
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toprint="$ci1.$ci2.$ci3.$ci4"
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if [ $showmac == true ]; then
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if [ -z "$hwaddress" ]; then
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hwaddress=$myhwaddr
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fi
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toprint="$toprint ( $hwaddress )"
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fi
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myhost=$(grep "$ci1.$ci2.$ci3.$ci4" /etc/hosts | grep -oP '\s.+' | xargs)
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if [ ! -z "$myhost" ]; then
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result="$result ( ${GREEN}$myhost${NC} )"
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fi
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if [ "$ci1.$ci2.$ci3.$ci4" == "$i1.$i2.$i3.$i4" ]; then
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result="$result ( ${RED}THIS DEVICE${NC} )"
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fi
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# if nothing found and nmap installed get device brand
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if [ "$result" == "???" ] && [ $showbrand == true ]; then
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result=$(sudo nmap -sP "$ci1.$ci2.$ci3.$ci4" | grep 'MAC Address' | grep -Po '\(.+?\)')
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if [ "$result" == "(Unknown)" ]; then
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result="???"
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else
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result="??? ${ORANGE}$result${NC}"
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fi
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fi
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echo -e "$toprint\t=>\t$result"
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fi
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done
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