From 843e7646c4ca8910686494a94676b84b96d536f3 Mon Sep 17 00:00:00 2001
From: Paul Trowbridge <fleetside72@hotmail.com>
Date: Sun, 29 Dec 2019 20:12:09 -0500
Subject: [PATCH] network scanning

---
 ubuntu/net-scan.sh | 108 +++++++++++++++++++++++++++++++++++++++++++++
 ubuntu/network.md  |   0
 ubuntu/scan.sh     |  12 +++++
 3 files changed, 120 insertions(+)
 create mode 100644 ubuntu/net-scan.sh
 create mode 100644 ubuntu/network.md
 create mode 100644 ubuntu/scan.sh

diff --git a/ubuntu/net-scan.sh b/ubuntu/net-scan.sh
new file mode 100644
index 0000000..d3587c9
--- /dev/null
+++ b/ubuntu/net-scan.sh
@@ -0,0 +1,108 @@
+usage="$(basename "$0") [OPTIONS] -- program to retrieve network devices and show IP address paired with the device name
+where:
+	-h	show this help text
+	-i	set the IP interface to check (default: 1) - check available IPs list with [-l] option
+	-l	list the available IP addresses
+	-a	show all network IPs, even if no computer name is found
+	-m	show MAC address
+	-b	show devices brand when no other information is available (if nmap installed and if can be found)"
+
+myip=1
+shownoname=false
+showmac=false
+showbrand=false
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+ORANGE='\033[0;33m'
+NC='\033[0m'
+
+while getopts ':halmbi:' option; do
+	case "$option" in
+		h) echo "$usage"
+			exit 0
+	   		;;
+		a) shownoname=true
+			;;
+		l) sudo nm-tool | grep -i 'address' | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | nl -n 'ln'
+		   	exit 0
+		   	;;
+		m) showmac=true
+			;;
+		b) showbrand=true
+			;;
+   		i) myip=$OPTARG
+			if [ -z $(sudo nm-tool | grep -i 'address' | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' | sed -n "$myip"p) ]; then
+				echo "there is no such interface, try the [-l] option"
+				exit 1
+			fi
+	   		;;
+	   	:) printf "missing argument for -%s\n" "$OPTARG" >&2
+	   		exit 1
+		   	;;
+		\?) printf "illegal option: -%s\n" "$OPTARG" >&2
+		   	exit 1
+		   	;;
+	esac
+done
+shift $((OPTIND - 1))
+
+# get if nmap is installed
+nmapInstalled=$(whereis nmap)
+if [ -z "$nmapInstalled" ]; then
+	showbrand=false
+fi
+
+maxwait=0.1;
+# get starter IP address
+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)
+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)
+si1=$(($i1 & $m1))
+si2=$(($i2 & $m2))
+si3=$(($i3 & $m3))
+si4=$(($i4 & $m4))
+# get my HW address
+myhwaddr=$(ifconfig | grep -B 1 "$i1.$i2.$i3.$i4" | grep -oP '([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})' | sed -n "$myip"p)
+# get number of IPs in network
+iprange=$(sudo nm-tool | grep -i 'prefix' | grep -Po '\s[0-9]+' | grep -Po '[0-9]+' | sed -n "$myip"p)
+iprange=$(( 2**(32-$iprange) -1 ))
+#  cycle through IPs
+for((i=1;i<$iprange;i++)); do
+	# calulate IP
+	ci4=$(($si4 + $i))
+	ci3=$(($si3 + ($ci4 / 256) )); ci4=$(($ci4 % 256))
+	ci2=$(($si2 + ($ci3 / 256) )); ci3=$(($ci3 % 256))
+	ci1=$(($si1 + ($ci2 / 256) )); ci2=$(($ci2 % 256))
+	# get computer name
+	result=$(timeout $maxwait nmblookup -A "$ci1.$ci2.$ci3.$ci4" | sed -n 2p | grep -Po '\t.+?\s' | xargs)
+	hwaddress=$(arp "$ci1.$ci2.$ci3.$ci4" | grep -Po '([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})')
+	if [ -z "$result" ] && [ ! -z "$hwaddress" ] && [ $shownoname == true ]; then
+		result="???"
+	fi
+	# print if response given
+	if [ ! -z "$result" ]; then
+		toprint="$ci1.$ci2.$ci3.$ci4"
+		if [ $showmac == true ]; then
+			if [ -z "$hwaddress" ]; then
+				hwaddress=$myhwaddr
+			fi
+			toprint="$toprint ( $hwaddress )"
+		fi
+		myhost=$(grep "$ci1.$ci2.$ci3.$ci4" /etc/hosts | grep -oP '\s.+' | xargs)
+		if [ ! -z "$myhost" ]; then
+			result="$result ( ${GREEN}$myhost${NC} )"
+		fi
+		if [ "$ci1.$ci2.$ci3.$ci4" == "$i1.$i2.$i3.$i4" ]; then
+			result="$result ( ${RED}THIS DEVICE${NC} )"
+		fi
+		# if nothing found and nmap installed get device brand
+		if [ "$result" == "???" ] && [ $showbrand == true ]; then
+			result=$(sudo nmap -sP "$ci1.$ci2.$ci3.$ci4" | grep 'MAC Address' | grep -Po '\(.+?\)')
+			if [ "$result" == "(Unknown)" ]; then
+				result="???"
+			else
+				result="??? ${ORANGE}$result${NC}"
+			fi
+		fi
+		echo -e "$toprint\t=>\t$result"
+	fi
+done
\ No newline at end of file
diff --git a/ubuntu/network.md b/ubuntu/network.md
new file mode 100644
index 0000000..e69de29
diff --git a/ubuntu/scan.sh b/ubuntu/scan.sh
new file mode 100644
index 0000000..f727794
--- /dev/null
+++ b/ubuntu/scan.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+is_alive_ping()
+{
+  ping -c 1 $1 > /dev/null
+  [ $? -eq 0 ] && echo Node with IP: $i is up.
+}
+
+for i in 192.168.1.{1..255} 
+do
+is_alive_ping $i & disown
+done
\ No newline at end of file