# -*- coding: binary -*-
#
require 'rexml/document'
require 'rex/parser/nmap_xml'
require 'msf/core/db_export'

module Msf
module Ui
module Console
module CommandDispatcher

class Db

	require 'tempfile'

	include Msf::Ui::Console::CommandDispatcher

	# TODO: Not thrilled about including this entire module for just store_local.
	include Msf::Auxiliary::Report

	#
	# The dispatcher's name.
	#
	def name
		"Database Backend"
	end

	#
	# Returns the hash of commands supported by this dispatcher.
	#
	def commands
		base = {
			"db_connect"    => "Connect to an existing database",
			"db_disconnect" => "Disconnect from the current database instance",
			"db_status"     => "Show the current database status",
		}

		more = {
			"workspace"     => "Switch between database workspaces",
			"hosts"         => "List all hosts in the database",
			"services"      => "List all services in the database",
			"vulns"         => "List all vulnerabilities in the database",
			"notes"         => "List all notes in the database",
			"loot"          => "List all loot in the database",
			"creds"         => "List all credentials in the database",
			"db_import"     => "Import a scan result file (filetype will be auto-detected)",
			"db_export"     => "Export a file containing the contents of the database",
			"db_nmap"       => "Executes nmap and records the output automatically",
			"db_rebuild_cache" => "Rebuilds the database-stored module cache"
		}

		# Always include commands that only make sense when connected.
		# This avoids the problem of them disappearing unexpectedly if the
		# database dies or times out.  See #1923
		base.merge(more)
	end

	def deprecated_commands
		[
			"db_autopwn",
			"db_driver",
			"db_hosts",
			"db_notes",
			"db_services",
			"db_vulns",
		]
	end

	#
	# Returns true if the db is connected, prints an error and returns
	# false if not.
	#
	# All commands that require an active database should call this before
	# doing anything.
	#
	def active?
		if not framework.db.active
			print_error("Database not connected")
			return false
		end
		true
	end

	def cmd_workspace_help
		print_line "Usage:"
		print_line "    workspace                  List workspaces"
		print_line "    workspace [name]           Switch workspace"
		print_line "    workspace -a [name] ...    Add workspace(s)"
		print_line "    workspace -d [name] ...    Delete workspace(s)"
		print_line "    workspace -r <old> <new>   Rename workspace"
		print_line "    workspace -h               Show this help information"
		print_line
	end

	def cmd_workspace(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		while (arg = args.shift)
			case arg
			when '-h','--help'
				cmd_workspace_help
				return
			when '-a','--add'
				adding = true
			when '-d','--del'
				deleting = true
			when '-r','--rename'
				renaming = true
			else
				names ||= []
				names << arg
			end
		end

		if adding and names
			# Add workspaces
			workspace = nil
			names.each do |name|
				workspace = framework.db.add_workspace(name)
				print_status("Added workspace: #{workspace.name}")
			end
			framework.db.workspace = workspace
		elsif deleting and names
			switched = false
			# Delete workspaces
			names.each do |name|
				workspace = framework.db.find_workspace(name)
				if workspace.nil?
					print_error("Workspace not found: #{name}")
				elsif workspace.default?
					workspace.destroy
					workspace = framework.db.add_workspace(name)
					print_status("Deleted and recreated the default workspace")
				else
					# switch to the default workspace if we're about to delete the current one
					if framework.db.workspace.name == workspace.name
						framework.db.workspace = framework.db.default_workspace
						switched = true
					end
					# now destroy the named workspace
					workspace.destroy
					print_status("Deleted workspace: #{name}")
				end
			end
			print_status("Switched workspace: #{framework.db.workspace.name}") if switched
		elsif renaming
			if names.length != 2
				print_error("Wrong number of arguments to rename")
				return
			end
			old, new = names

			workspace = framework.db.find_workspace(old)
			if workspace.nil?
				print_error("Workspace not found: #{name}")
				return
			end

			if framework.db.find_workspace(new)
				print_error("Workspace exists: #{new}")
				return
			end

			workspace.name = new
			workspace.save!
		elsif names
			name = names.last
			# Switch workspace
			workspace = framework.db.find_workspace(name)
			if workspace
				framework.db.workspace = workspace
				print_status("Workspace: #{workspace.name}")
			else
				print_error("Workspace not found: #{name}")
				return
			end
		else
			# List workspaces
			framework.db.workspaces.each do |s|
				pad = (s.name == framework.db.workspace.name) ? "* " : "  "
				print_line("#{pad}#{s.name}")
			end
		end
	}
	end

	def cmd_workspace_tabs(str, words)
		return [] unless active?
		framework.db.workspaces.map { |s| s.name } if (words & ['-a','--add']).empty?
	end

	def cmd_hosts_help
		# This command does some lookups for the list of appropriate column
		# names, so instead of putting all the usage stuff here like other
		# help methods, just use it's "-h" so we don't have to recreating
		# that list
		cmd_hosts("-h")
	end

	def cmd_hosts(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		onlyup = false
		host_search = nil
		set_rhosts = false
		mode = :search
		delete_count = 0

		rhosts = []
		host_ranges = []
		search_term = nil

		output = nil
		default_columns = ::Mdm::Host.column_names.sort
		virtual_columns = [ 'svcs', 'vulns', 'workspace' ]

		col_search = [ 'address', 'mac', 'name', 'os_name', 'os_flavor', 'os_sp', 'purpose', 'info', 'comments']

		default_columns.delete_if {|v| (v[-2,2] == "id")}
		while (arg = args.shift)
			case arg
			when '-a','--add'
				mode = :add
			when '-d','--delete'
				mode = :delete
			when '-c'
				list = args.shift
				if(!list)
					print_error("Invalid column list")
					return
				end
				col_search = list.strip().split(",")
				col_search.each { |c|
					if not default_columns.include?(c) and not virtual_columns.include?(c)
						all_columns = default_columns + virtual_columns
						print_error("Invalid column list. Possible values are (#{all_columns.join("|")})")
						return
					end
				}
			when '-u','--up'
				onlyup = true
			when '-o'
				output = args.shift
			when '-R','--rhosts'
				set_rhosts = true
			when '-S', '--search'
				search_term = /#{args.shift}/nmi

			when '-h','--help'
				print_line "Usage: hosts [ options ] [addr1 addr2 ...]"
				print_line
				print_line "OPTIONS:"
				print_line "  -a,--add          Add the hosts instead of searching"
				print_line "  -d,--delete       Delete the hosts instead of searching"
				print_line "  -c <col1,col2>    Only show the given columns (see list below)"
				print_line "  -h,--help         Show this help information"
				print_line "  -u,--up           Only show hosts which are up"
				print_line "  -o <file>         Send output to a file in csv format"
				print_line "  -R,--rhosts       Set RHOSTS from the results of the search"
				print_line "  -S,--search       Search string to filter by"
				print_line
				print_line "Available columns: #{default_columns.join(", ")}"
				print_line
				return
			else
				# Anything that wasn't an option is a host to search for
				unless (arg_host_range(arg, host_ranges))
					return
				end
			end
		end

		if col_search
			col_names = col_search
		else
			col_names = default_columns + virtual_columns
		end

		if mode == :add
			host_ranges.each do |range|
				range.each do |address|
					host = framework.db.find_or_create_host(:host => address)
					print_status("Time: #{host.created_at} Host: host=#{host.address}")
				end
			end
			return
		end

		# If we got here, we're searching.  Delete implies search

		tbl = Rex::Ui::Text::Table.new(
			{
				'Header'  => "Hosts",
				'Columns' => col_names,
			})

		# Sentinal value meaning all
		host_ranges.push(nil) if host_ranges.empty?

		each_host_range_chunk(host_ranges) do |host_search|
			framework.db.hosts(framework.db.workspace, onlyup, host_search).each do |host|
				if search_term
					next unless host.attribute_names.any? { |a| host[a.intern].to_s.match(search_term) }
				end
				columns = col_names.map do |n|
					# Deal with the special cases
					if virtual_columns.include?(n)
						case n
						when "svcs";      host.services.length
						when "vulns";     host.vulns.length
						when "workspace"; host.workspace.name
						end
					# Otherwise, it's just an attribute
					else
						host.attributes[n] || ""
					end
				end

				tbl << columns
				if set_rhosts
					addr = (host.scope ? host.address + '%' + host.scope : host.address )
					rhosts << addr
				end
				if mode == :delete
					host.destroy
					delete_count += 1
				end
			end
		end

		if output
			print_status("Wrote hosts to #{output}")
			::File.open(output, "wb") { |ofd|
				ofd.write(tbl.to_csv)
			}
		else
			print_line
			print_line(tbl.to_s)
		end

		# Finally, handle the case where the user wants the resulting list
		# of hosts to go into RHOSTS.
		set_rhosts_from_addrs(rhosts.uniq) if set_rhosts
		print_status("Deleted #{delete_count} hosts") if delete_count > 0
	}
	end

	def cmd_services_help
		# Like cmd_hosts, use "-h" instead of recreating the column list
		# here
		cmd_services("-h")
	end

	def cmd_services(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		mode = :search
		onlyup = false
		output_file = nil
		set_rhosts = nil
		col_search = ['port', 'proto', 'name', 'state', 'info']
		default_columns = ::Mdm::Service.column_names.sort
		default_columns.delete_if {|v| (v[-2,2] == "id")}

		host_ranges  = []
		port_ranges  = []
		rhosts       = []
		delete_count = 0
		search_term  = nil

		# option parsing
		while (arg = args.shift)
			case arg
			when '-a','--add'
				mode = :add
			when '-d','--delete'
				mode = :delete
			when '-u','--up'
				onlyup = true
			when '-c'
				list = args.shift
				if(!list)
					print_error("Invalid column list")
					return
				end
				col_search = list.strip().split(",")
				col_search.each { |c|
					if not default_columns.include? c
						print_error("Invalid column list. Possible values are (#{default_columns.join("|")})")
						return
					end
				}
			when '-p'
				unless (arg_port_range(args.shift, port_ranges, true))
					return
				end
			when '-r'
				proto = args.shift
				if (!proto)
					print_status("Invalid protocol")
					return
				end
				proto = proto.strip
			when '-s'
				namelist = args.shift
				if (!namelist)
					print_error("Invalid name list")
					return
				end
				names = namelist.strip().split(",")
			when '-o'
				output_file = args.shift
				if (!output_file)
					print_error("Invalid output filename")
					return
				end
				output_file = ::File.expand_path(output_file)
			when '-R','--rhosts'
				set_rhosts = true
			when '-S', '--search'
				search_term = /#{args.shift}/nmi

			when '-h','--help'
				print_line
				print_line "Usage: services [-h] [-u] [-a] [-r <proto>] [-p <port1,port2>] [-s <name1,name2>] [-o <filename>] [addr1 addr2 ...]"
				print_line
				print_line "  -a,--add          Add the services instead of searching"
				print_line "  -d,--delete       Delete the services instead of searching"
				print_line "  -c <col1,col2>    Only show the given columns"
				print_line "  -h,--help         Show this help information"
				print_line "  -s <name1,name2>  Search for a list of service names"
				print_line "  -p <port1,port2>  Search for a list of ports"
				print_line "  -r <protocol>     Only show [tcp|udp] services"
				print_line "  -u,--up           Only show services which are up"
				print_line "  -o <file>         Send output to a file in csv format"
				print_line "  -R,--rhosts       Set RHOSTS from the results of the search"
				print_line "  -S,--search       Search string to filter by"
				print_line
				print_line "Available columns: #{default_columns.join(", ")}"
				print_line
				return
			else
				# Anything that wasn't an option is a host to search for
				unless (arg_host_range(arg, host_ranges))
					return
				end
			end
		end

		ports = port_ranges.flatten.uniq

		if mode == :add
			# Can only deal with one port and one service name at a time
			# right now.  Them's the breaks.
			if ports.length != 1
				print_error("Exactly one port required")
				return
			end
			host_ranges.each do |range|
				range.each do |addr|
					host = framework.db.find_or_create_host(:host => addr)
					next if not host
					info = {
						:host => host,
						:port => ports.first.to_i
					}
					info[:proto] = proto.downcase if proto
					info[:name]  = names.first.downcase if names and names.first

					svc = framework.db.find_or_create_service(info)
					print_status("Time: #{svc.created_at} Service: host=#{svc.host.address} port=#{svc.port} proto=#{svc.proto} name=#{svc.name}")
				end
			end
			return
		end

		# If we got here, we're searching.  Delete implies search

		col_names = default_columns
		if col_search
			col_names = col_search
		end
		tbl = Rex::Ui::Text::Table.new({
				'Header'  => "Services",
				'Columns' => ['host'] + col_names,
			})

		# Sentinal value meaning all
		host_ranges.push(nil) if host_ranges.empty?
		ports = nil if ports.empty?

		each_host_range_chunk(host_ranges) do |host_search|
			framework.db.services(framework.db.workspace, onlyup, proto, host_search, ports, names).each do |service|

				host = service.host
				if search_term
					next unless(
						host.attribute_names.any? { |a| host[a.intern].to_s.match(search_term)} or
						service.attribute_names.any? { |a| service[a.intern].to_s.match(search_term)}
					)
				end

				columns = [host.address] + col_names.map { |n| service[n].to_s || "" }
				tbl << columns
				if set_rhosts
					addr = (host.scope ? host.address + '%' + host.scope : host.address )
					rhosts << addr
				end

				if (mode == :delete)
					service.destroy
					delete_count += 1
				end
			end
		end

		print_line
		if (output_file == nil)
			print_line(tbl.to_s)
		else
			# create the output file
			::File.open(output_file, "wb") { |f| f.write(tbl.to_csv) }
			print_status("Wrote services to #{output_file}")
		end

		# Finally, handle the case where the user wants the resulting list
		# of hosts to go into RHOSTS.
		set_rhosts_from_addrs(rhosts.uniq) if set_rhosts
		print_status("Deleted #{delete_count} services") if delete_count > 0

	}
	end

	def cmd_vulns_help
		print_line "Print all vulnerabilities in the database"
		print_line
		print_line "Usage: vulns [addr range]"
		print_line
		print_line "  -h,--help             Show this help information"
		print_line "  -p,--port <portspec>  List vulns matching this port spec"
		print_line "  -s <svc names>        List vulns matching these service names"
		print_line "  -S,--search           Search string to filter by"
		print_line "  -i,--info             Display Vuln Info"
		print_line
		print_line "Examples:"
		print_line "  vulns -p 1-65536          # only vulns with associated services"
		print_line "  vulns -p 1-65536 -s http  # identified as http on any port"
		print_line
	end

	def cmd_vulns(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {

		host_ranges = []
		port_ranges = []
		svcs        = []
		search_term = nil
		show_info   = false

		# Short-circuit help
		if args.delete "-h"
			cmd_vulns_help
			return
		end

		mode = :search
		while (arg = args.shift)
			case arg
			#when "-a","--add"
			#	mode = :add
			#when "-d"
			#	mode = :delete
			when "-h"
				cmd_vulns_help
				return
			when "-p","--port"
				unless (arg_port_range(args.shift, port_ranges, true))
					return
				end
			when "-s","--service"
				service = args.shift
				if (!service)
					print_error("Argument required for -s")
					return
				end
				svcs = service.split(/[\s]*,[\s]*/)
			when '-S', '--search'
				search_term = /#{args.shift}/nmi
			when '-i', '--info'
				show_info = true
			else
				# Anything that wasn't an option is a host to search for
				unless (arg_host_range(arg, host_ranges))
					return
				end
			end
		end

		# normalize
		host_ranges.push(nil) if host_ranges.empty?
		ports = port_ranges.flatten.uniq
		svcs.flatten!

		each_host_range_chunk(host_ranges) do |host_search|
			framework.db.hosts(framework.db.workspace, false, host_search).each do |host|
				host.vulns.each do |vuln|
					if search_term
						next unless(
							vuln.host.attribute_names.any? { |a| vuln.host[a.intern].to_s.match(search_term) } or
							vuln.attribute_names.any? { |a| vuln[a.intern].to_s.match(search_term) }
						)
					end
					reflist = vuln.refs.map { |r| r.name }
					if(vuln.service)
						# Skip this one if the user specified a port and it
						# doesn't match.
						next unless ports.empty? or ports.include? vuln.service.port
						# Same for service names
						next unless svcs.empty? or svcs.include?(vuln.service.name)
						print_status("Time: #{vuln.created_at} Vuln: host=#{host.address} name=#{vuln.name} refs=#{reflist.join(',')} #{(show_info && vuln.info) ? "info=#{vuln.info}" : ""}")

					else
						# This vuln has no service, so it can't match
						next unless ports.empty? and svcs.empty?
						print_status("Time: #{vuln.created_at} Vuln: host=#{host.address} name=#{vuln.name} refs=#{reflist.join(',')} #{(show_info && vuln.info) ? "info=#{vuln.info}" : ""}")
					end
				end
			end
		end
	}
	end

	def cmd_creds_help
		print_line "Usage: creds [addr range]"
		print_line "Usage: creds -a <addr range> -p <port> -t <type> -u <user> -P <pass>"
		print_line
		print_line "  -a,--add              Add creds to the given addresses instead of listing"
		print_line "  -d,--delete           Delete the creds instead of searching"
		print_line "  -h,--help             Show this help information"
		print_line "  -o <file>             Send output to a file in csv format"
		print_line "  -p,--port <portspec>  List creds matching this port spec"
		print_line "  -s <svc names>        List creds matching these service names"
		print_line "  -t,--type <type>      Add a cred of this type (only with -a). Default: password"
		print_line "  -u,--user             Add a cred for this user (only with -a). Default: blank"
		print_line "  -P,--password         Add a cred with this password (only with -a). Default: blank"
		print_line "  -R,--rhosts           Set RHOSTS from the results of the search"
		print_line "  -S,--search           Search string to filter by"
		print_line
		print_line "Examples:"
		print_line "  creds               # Default, returns all active credentials"
		print_line "  creds all           # Returns all credentials active or not"
		print_line "  creds 1.2.3.4/24    # nmap host specification"
		print_line "  creds -p 22-25,445  # nmap port specification"
		print_line "  creds 10.1.*.* -s ssh,smb all"
		print_line
	end

	#
	# Can return return active or all, on a certain host or range, on a
	# certain port or range, and/or on a service name.
	#
	def cmd_creds(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {

		search_param = nil
		inactive_ok = false
		type = "password"

		set_rhosts = false
		output_file = nil

		host_ranges = []
		port_ranges = []
		rhosts      = []
		svcs        = []
		delete_count = 0
		search_term = nil

		user = nil

		# Short-circuit help
		if args.delete "-h"
			cmd_creds_help
			return
		end

		mode = :search
		while (arg = args.shift)
			case arg
			when "-a","--add"
				mode = :add
			when "-d"
				mode = :delete
			when "-h"
				cmd_creds_help
				return
			when '-o'
				output_file = args.shift
				if (!output_file)
					print_error("Invalid output filename")
					return
				end
				output_file = ::File.expand_path(output_file)
			when "-p","--port"
				unless (arg_port_range(args.shift, port_ranges, true))
					return
				end
			when "-t","--type"
				ptype = args.shift
				if (!ptype)
					print_error("Argument required for -t")
					return
				end
			when "-s","--service"
				service = args.shift
				if (!service)
					print_error("Argument required for -s")
					return
				end
				svcs = service.split(/[\s]*,[\s]*/)
			when "-P","--password"
				pass = args.shift
				if (!pass)
					print_error("Argument required for -P")
					return
				end
			when "-R"
				set_rhosts = true
			when '-S', '--search'
				search_term = /#{args.shift}/nmi
			when "-u","--user"
				user = args.shift
				if (!user)
					print_error("Argument required for -u")
					return
				end
			when "all"
				# The user wants inactive passwords, too
				inactive_ok = true
			else
				# Anything that wasn't an option is a host to search for
				unless (arg_host_range(arg, host_ranges))
					return
				end
			end
		end

		if mode == :add
			if port_ranges.length != 1 or port_ranges.first.length != 1
				print_error("Exactly one port required")
				return
			end
			port = port_ranges.first.first
			host_ranges.each do |range|
				range.each do |host|
					cred = framework.db.find_or_create_cred(
						:host => host,
						:port => port,
						:user => (user == "NULL" ? nil : user),
						:pass => (pass == "NULL" ? nil : pass),
						:type => ptype,
						:sname => service,
						:active => true
					)
					print_status("Time: #{cred.updated_at} Credential: host=#{cred.service.host.address} port=#{cred.service.port} proto=#{cred.service.proto} sname=#{cred.service.name} type=#{cred.ptype} user=#{cred.user} pass=#{cred.pass} active=#{cred.active}")
				end
			end
			return
		end

		# If we get here, we're searching.  Delete implies search

		if user
			user_regex = Regexp.compile(user)
		end

		# normalize
		ports = port_ranges.flatten.uniq
		svcs.flatten!

		tbl = Rex::Ui::Text::Table.new({
				'Header'  => "Credentials",
				'Columns' => [ 'host', 'port', 'user', 'pass', 'type', 'active?' ],
			})

		creds_returned = 0
		# Now do the actual search
		framework.db.each_cred(framework.db.workspace) do |cred|
			# skip if it's inactive and user didn't ask for all
			next unless (cred.active or inactive_ok)
			if search_term
				next unless cred.attribute_names.any? { |a| cred[a.intern].to_s.match(search_term) }
			end
			# Also skip if the user is searching for something and this
			# one doesn't match
			includes = false
			host_ranges.map do |rw|
				includes = rw.include? cred.service.host.address
				break if includes
			end
			next unless host_ranges.empty? or includes

			# Same for ports
			next unless ports.empty? or ports.include? cred.service.port

			# Same for service names
			next unless svcs.empty? or svcs.include?(cred.service.name)

			if user_regex
				next unless user_regex.match(cred.user)
			end
			row = [
					cred.service.host.address, cred.service.port,
					cred.user, cred.pass, cred.ptype,
					(cred.active ? "true" : "false")
				]
			tbl << row
			if mode == :delete
				cred.destroy
				delete_count += 1
			end
			if set_rhosts
				addr = (cred.service.host.scope ? cred.service.host.address + '%' + cred.service.host.scope : cred.service.host.address )
				rhosts << addr
			end
			creds_returned += 1
		end

		print_line
		if (output_file == nil)
			print_line(tbl.to_s)
		else
			# create the output file
			::File.open(output_file, "wb") { |f| f.write(tbl.to_csv) }
			print_status("Wrote services to #{output_file}")
		end

		set_rhosts_from_addrs(rhosts.uniq) if set_rhosts
		print_status("Deleted #{delete_count} credentials") if delete_count > 0
	}
	end

	def cmd_notes_help
		print_line "Usage: notes [-h] [-t <type1,type2>] [-n <data string>] [-a] [addr range]"
		print_line
		print_line "  -a,--add                  Add a note to the list of addresses, instead of listing"
		print_line "  -d,--delete               Delete the hosts instead of searching"
		print_line "  -n,--note <data>          Set the data for a new note (only with -a)"
		print_line "  -t <type1,type2>          Search for a list of types"
		print_line "  -h,--help                 Show this help information"
		print_line "  -R,--rhosts               Set RHOSTS from the results of the search"
		print_line "  -S,--search               Regular expression to match for search"
		print_line "  --sort <field1,field2>    Fields to sort by (case sensitive)"
		print_line
		print_line "Examples:"
		print_line "  notes --add -t apps -n 'winzip' 10.1.1.34 10.1.20.41"
		print_line "  notes -t smb.fingerprint 10.1.1.34 10.1.20.41"
		print_line "  notes -S 'nmap.nse.(http|rtsp)' --sort type,output"
		print_line
	end

	def cmd_notes(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		mode = :search
		data = nil
		types = nil
		set_rhosts = false

		host_ranges = []
		rhosts      = []
		search_term = nil

		while (arg = args.shift)
			case arg
			when '-a','--add'
				mode = :add
			when '-d','--delete'
				mode = :delete
			when '-n','--note'
				data = args.shift
				if(!data)
					print_error("Can't make a note with no data")
					return
				end
			when '-t'
				typelist = args.shift
				if(!typelist)
					print_error("Invalid type list")
					return
				end
				types = typelist.strip().split(",")
			when '-R', '--rhosts'
				set_rhosts = true
			when '-S', '--search'
				search_term = /#{args.shift}/nmi
			when '--sort'
				sort_term = args.shift
			when '-h','--help'
				cmd_notes_help
				return
			else
				# Anything that wasn't an option is a host to search for
				unless (arg_host_range(arg, host_ranges))
					return
				end
			end

		end

		if mode == :add
			if types.nil? or types.size != 1
				print_error("Exactly one note type is required")
				return
			end
			type = types.first
			host_ranges.each { |range|
				range.each { |addr|
					host = framework.db.find_or_create_host(:host => addr)
					break if not host
					note = framework.db.find_or_create_note(:host => host, :type => type, :data => data)
					break if not note
					print_status("Time: #{note.created_at} Note: host=#{host.address} type=#{note.ntype} data=#{note.data}")
				}
			}
			return
		end

		note_list = []
		delete_count = 0
		if host_ranges.empty? # No host specified - collect all notes
			note_list = framework.db.notes.dup
		else # Collect notes of specified hosts
			each_host_range_chunk(host_ranges) do |host_search|
				framework.db.hosts(framework.db.workspace, false, host_search).each do |host|
					note_list.concat(host.notes)
				end
			end
		end
		if search_term
			note_list.delete_if do |n|
				!n.attribute_names.any? { |a| n[a.intern].to_s.match(search_term) }
			end
		end

		# Sort the notes based on the sort_term provided
		if sort_term != nil
			sort_terms = sort_term.split(",")
			note_list.sort_by! do |note|
				orderlist = []
				sort_terms.each do |term|
					term = "ntype" if term == "type"
					term = "created_at" if term == "Time"
					if term == nil
						orderlist << ""
					elsif term == "service"
						if note.service != nil
							orderlist << make_sortable(note.service.name)
						end
					elsif term == "port"
						if note.service != nil
							orderlist << make_sortable(note.service.port)
						end
					elsif term == "output"
						orderlist << make_sortable(note.data["output"])
					elsif note.respond_to?(term)
						orderlist << make_sortable(note.send(term))
					elsif note.respond_to?(term.to_sym)
						orderlist << make_sortable(note.send(term.to_sym))
					elsif note.respond_to?("data") && note.send("data").respond_to?(term)
						orderlist << make_sortable(note.send("data").send(term))
					elsif note.respond_to?("data") && note.send("data").respond_to?(term.to_sym)
						orderlist << make_sortable(note.send("data").send(term.to_sym))
					else
						orderlist << ""
					end
				end
				orderlist
			end
		end

		# Now display them
		note_list.each do |note|
			next if(types and types.index(note.ntype).nil?)
			msg = "Time: #{note.created_at} Note:"
			if (note.host)
				host = note.host
				msg << " host=#{note.host.address}"
				if set_rhosts
					addr = (host.scope ? host.address + '%' + host.scope : host.address )
					rhosts << addr
				end
			end
			if (note.service)
				name = (note.service.name ? note.service.name : "#{note.service.port}/#{note.service.proto}")
				msg << " service=#{name}"
			end
			msg << " type=#{note.ntype} data=#{note.data.inspect}"
			print_status(msg)
			if mode == :delete
				note.destroy
				delete_count += 1
			end
		end

		# Finally, handle the case where the user wants the resulting list
		# of hosts to go into RHOSTS.
		set_rhosts_from_addrs(rhosts.uniq) if set_rhosts

		print_status("Deleted #{delete_count} notes") if delete_count > 0
	}
	end

	def make_sortable(input)
		case input.class
		when String
			input = input.downcase
		when Fixnum
			input = "%016" % input
		when Time
			input = input.strftime("%Y%m%d%H%M%S%L")
		when NilClass
			input = ""
		else
			input = input.inspect.downcase
		end
		input
	end

	def cmd_loot_help
		print_line "Usage: loot <options>"
		print_line " Info: loot [-h] [addr1 addr2 ...] [-t <type1,type2>]"
		print_line "  Add: loot -f [fname] -i [info] -a [addr1 addr2 ...] [-t [type]"
		print_line "  Del: loot -d [addr1 addr2 ...]"
		print_line
		print_line "  -a,--add          Add loot to the list of addresses, instead of listing"
		print_line "  -d,--delete       Delete *all* loot matching host and type"
		print_line "  -f,--file         File with contents of the loot to add"
		print_line "  -i,--info         Info of the loot to add"
		print_line "  -t <type1,type2>  Search for a list of types"
		print_line "  -h,--help         Show this help information"
		print_line "  -S,--search       Search string to filter by"
		print_line
	end

	def cmd_loot(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		mode = :search
		host_ranges = []
		types = nil
		delete_count = 0
		search_term = nil
		file = nil
		name = nil
		info = nil

		while (arg = args.shift)
			case arg
				when '-a','--add'
					mode = :add
				when '-d','--delete'
					mode = :delete
				when '-f','--file'
					filename = args.shift
					if(!filename)
						print_error("Can't make loot with no filename")
						return
					end
					if (!File.exists?(filename) or !File.readable?(filename))
						print_error("Can't read file")
						return
					end
				when '-i','--info'
					info = args.shift
					if(!info)
						print_error("Can't make loot with no info")
					return
				end
				when '-t'
					typelist = args.shift
					if(!typelist)
						print_error("Invalid type list")
						return
					end
					types = typelist.strip().split(",")
				when '-S', '--search'
					search_term = /#{args.shift}/nmi
				when '-h','--help'
					cmd_loot_help
					return
				else
					# Anything that wasn't an option is a host to search for
					unless (arg_host_range(arg, host_ranges))
					return
				end
			end
		end

		tbl = Rex::Ui::Text::Table.new({
				'Header'  => "Loot",
				'Columns' => [ 'host', 'service', 'type', 'name', 'content', 'info', 'path' ],
			})

		# Sentinal value meaning all
		host_ranges.push(nil) if host_ranges.empty?

	if mode == :add
		if info.nil?
			print_error("Info required")
			return
		end
		if filename.nil?
			print_error("Loot file required")
			return
		end
		if types.nil? or types.size != 1
			print_error("Exactly one loot type is required")
			return
		end
		type = types.first
		name = File.basename(filename)
		host_ranges.each do |range|
			range.each do |host|
				file = File.open(filename, "rb")
				contents = file.read
				lootfile = framework.db.find_or_create_loot(:type => type, :host => host,:info => info, :data => contents,:path => filename,:name => name)
				print_status("Added loot #{host}")
			end
		end
		return
	end

		each_host_range_chunk(host_ranges) do |host_search|
			framework.db.hosts(framework.db.workspace, false, host_search).each do |host|
				host.loots.each do |loot|
					next if(types and types.index(loot.ltype).nil?)
					if search_term
					next unless(
						loot.attribute_names.any? { |a| loot[a.intern].to_s.match(search_term) } or
						loot.host.attribute_names.any? { |a| loot.host[a.intern].to_s.match(search_term) }
					)
					end
					row = []
					row.push( (loot.host ? loot.host.address : "") )
					if (loot.service)
						svc = (loot.service.name ? loot.service.name : "#{loot.service.port}/#{loot.service.proto}")
						row.push svc
					else
						row.push ""
					end
					row.push(loot.ltype)
					row.push(loot.name || "")
					row.push(loot.content_type)
					row.push(loot.info || "")
					row.push(loot.path)

					tbl << row
					if (mode == :delete)
						loot.destroy
						delete_count += 1
					end
				end
			end
		end

		# Handle hostless loot
		if host_ranges.compact.empty? # Wasn't a host search
			hostless_loot = framework.db.loots.find_all_by_host_id(nil)
			hostless_loot.each do |loot|
				row = []
				row.push("")
				row.push("")
				row.push(loot.ltype)
				row.push(loot.name || "")
				row.push(loot.content_type)
				row.push(loot.info || "")
				row.push(loot.path)
				tbl << row
				if (mode == :delete)
					loot.destroy
					delete_count += 1
				end
			end
		end

		print_line
		print_line(tbl.to_s)
		print_status("Deleted #{delete_count} loots") if delete_count > 0
	}
	end

	# :category: Deprecated Commands
	def cmd_db_hosts_help; deprecated_help(:hosts); end
	# :category: Deprecated Commands
	def cmd_db_notes_help; deprecated_help(:notes); end
	# :category: Deprecated Commands
	def cmd_db_vulns_help; deprecated_help(:vulns); end
	# :category: Deprecated Commands
	def cmd_db_services_help; deprecated_help(:services); end
	# :category: Deprecated Commands
	def cmd_db_autopwn_help; deprecated_help; end
	# :category: Deprecated Commands
	def cmd_db_driver_help; deprecated_help; end

	# :category: Deprecated Commands
	def cmd_db_hosts(*args); deprecated_cmd(:hosts, *args); end
	# :category: Deprecated Commands
	def cmd_db_notes(*args); deprecated_cmd(:notes, *args); end
	# :category: Deprecated Commands
	def cmd_db_vulns(*args); deprecated_cmd(:vulns, *args); end
	# :category: Deprecated Commands
	def cmd_db_services(*args); deprecated_cmd(:services, *args); end
	# :category: Deprecated Commands
	def cmd_db_autopwn(*args); deprecated_cmd; end

	# :category: Deprecated Commands
	#
	# This one deserves a little more explanation than standard deprecation
	# warning, so give the user a better understanding of what's going on.
	#
	def cmd_db_driver(*args)
		deprecated_cmd
		print_line
		print_line "Because Metasploit no longer supports databases other than the default"
		print_line "PostgreSQL, there is no longer a need to set the driver. Thus db_driver"
		print_line "is not useful and its functionality has been removed. Usually Metasploit"
		print_line "will already have connected to the database; check db_status to see."
		print_line
		cmd_db_status
	end

	def cmd_db_import_tabs(str, words)
		tab_complete_filenames(str, words)
	end

	def cmd_db_import_help
		print_line "Usage: db_import <filename> [file2...]"
		print_line
		print_line "Filenames can be globs like *.xml, or **/*.xml which will search recursively"
		print_line "Currently supported file types include:"
		print_line "    Acunetix XML"
		print_line "    Amap Log"
		print_line "    Amap Log -m"
		print_line "    Appscan XML"
		print_line "    Burp Session XML"
		print_line "    Foundstone XML"
		print_line "    IP360 ASPL"
		print_line "    IP360 XML v3"
		print_line "    Microsoft Baseline Security Analyzer"
		print_line "    Nessus NBE"
		print_line "    Nessus XML (v1 and v2)"
		print_line "    NetSparker XML"
		print_line "    NeXpose Simple XML"
		print_line "    NeXpose XML Report"
		print_line "    Nmap XML"
		print_line "    OpenVAS Report"
		print_line "    Qualys Asset XML"
		print_line "    Qualys Scan XML"
		print_line "    Retina XML"
		print_line
	end

	#
	# Generic import that automatically detects the file type
	#
	def cmd_db_import(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		if (args.include?("-h") or not (args and args.length > 0))
			cmd_db_import_help
			return
		end
		args.each { |glob|
			files = ::Dir.glob(::File.expand_path(glob))
			if files.empty?
				print_error("No such file #{glob}")
				next
			end
			files.each { |filename|
				if (not ::File.readable?(filename))
					print_error("Could not read file #{filename}")
					next
				end
				begin
					warnings = 0
					framework.db.import_file(:filename => filename) do |type,data|
						case type
						when :debug
							print_error("DEBUG: #{data.inspect}")
						when :vuln
							inst = data[1] == 1 ? "instance" : "instances"
							print_status("Importing vulnerability '#{data[0]}' (#{data[1]} #{inst})")
						when :filetype
							print_status("Importing '#{data}' data")
						when :parser
							print_status("Import: Parsing with '#{data}'")
						when :address
							print_status("Importing host #{data}")
						when :service
							print_status("Importing service #{data}")
						when :msf_loot
							print_status("Importing loot #{data}")
						when :msf_task
							print_status("Importing task #{data}")
						when :msf_report
							print_status("Importing report #{data}")
						when :pcap_count
							print_status("Import: #{data} packets processed")
						when :record_count
							print_status("Import: #{data[1]} records processed")
						when :warning
							print_error
							data.split("\n").each do |line|
								print_error(line)
							end
							print_error
							warnings += 1
						end
					end
					print_status("Successfully imported #{filename}")

					print_error("Please note that there were #{warnings} warnings") if warnings > 1
					print_error("Please note that there was one warning") if warnings == 1

				rescue DBImportError
					print_error("Failed to import #{filename}: #{$!}")
					elog("Failed to import #{filename}: #{$!.class}: #{$!}")
					dlog("Call stack: #{$@.join("\n")}", LEV_3)
					next
				rescue REXML::ParseException => e
					print_error("Failed to import #{filename} due to malformed XML:")
					print_error("#{$!.class}: #{$!}")
					elog("Failed to import #{filename}: #{$!.class}: #{$!}")
					dlog("Call stack: #{$@.join("\n")}", LEV_3)
					next
				end
			}
		}
	}
	end

	def cmd_db_export_help
		# Like db_hosts and db_services, this creates a list of columns, so
		# use its -h
		cmd_db_export("-h")
	end

	#
	# Export an XML
	#
	def cmd_db_export(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {

		export_formats = %W{xml pwdump}
		format = 'xml'
		output = nil

		while (arg = args.shift)
			case arg
			when '-h','--help'
				print_line "Usage:"
				print_line "    db_export -f <format> [-a] [filename]"
				print_line "    Format can be one of: #{export_formats.join(", ")}"
			when '-f','--format'
				format = args.shift.to_s.downcase
			else
				output = arg
			end
		end

		if not output
			print_error("No output file was specified")
			return
		end

		if not export_formats.include?(format)
			print_error("Unsupported file format: #{format}")
			print_error("Unsupported file format: '#{format}'. Must be one of: #{export_formats.join(", ")}")
			return
		end

		print_status("Starting export of workspace #{framework.db.workspace.name} to #{output} [ #{format} ]...")
		exporter = ::Msf::DBManager::Export.new(framework.db.workspace)

		exporter.send("to_#{format}_file".intern,output) do |mtype, mstatus, mname|
			if mtype == :status
				if mstatus == "start"
					print_status("    >> Starting export of #{mname}")
				end
				if mstatus == "complete"
					print_status("    >> Finished export of #{mname}")
				end
			end
		end
		print_status("Finished export of workspace #{framework.db.workspace.name} to #{output} [ #{format} ]...")
	}
	end

	#
	# Import Nmap data from a file
	#
	def cmd_db_nmap(*args)
		return unless active?
	::ActiveRecord::Base.connection_pool.with_connection {
		if (args.length == 0)
			print_status("Usage: db_nmap [nmap options]")
			return
		end

		save = false
		if args.include?("save")
			save = active?
			args.delete("save")
		end

		nmap =
			Rex::FileUtils.find_full_path("nmap") ||
			Rex::FileUtils.find_full_path("nmap.exe")

		if (not nmap)
			print_error("The nmap executable could not be found")
			return
		end

		fd = Tempfile.new('dbnmap')
		fd.binmode

		fo = Tempfile.new('dbnmap')
		fo.binmode

		# When executing native Nmap in Cygwin, expand the Cygwin path to a Win32 path
		if(Rex::Compat.is_cygwin and nmap =~ /cygdrive/)
			# Custom function needed because cygpath breaks on 8.3 dirs
			tout = Rex::Compat.cygwin_to_win32(fd.path)
			fout = Rex::Compat.cygwin_to_win32(fo.path)
			args.push('-oX', tout)
			args.push('-oN', fout)
		else
			args.push('-oX', fd.path)
			args.push('-oN', fo.path)
		end

		begin
			nmap_pipe = ::Open3::popen3([nmap, "nmap"], *args)
			temp_nmap_threads = []
			temp_nmap_threads << framework.threads.spawn("db_nmap-Stdout", false, nmap_pipe[1]) do |np_1|
				np_1.each_line do |nmap_out|
					next if nmap_out.strip.empty?
					print_status("Nmap: #{nmap_out.strip}")
				end
			end

			temp_nmap_threads << framework.threads.spawn("db_nmap-Stderr", false, nmap_pipe[2]) do |np_2|
				np_2.each_line do |nmap_err|
					next if nmap_err.strip.empty?
					print_status("Nmap: '#{nmap_err.strip}'")
				end
			end

			temp_nmap_threads.map {|t| t.join rescue nil}
			nmap_pipe.each {|p| p.close rescue nil}
		rescue ::IOError
		end

		fo.close(true)
		framework.db.import_nmap_xml_file(:filename => fd.path)

		if save
			fd.rewind
			saved_path = report_store_local("nmap.scan.xml", "text/xml", fd.read, "nmap_#{Time.now.utc.to_i}")
			print_status("Saved NMAP XML results to #{saved_path}")
		end
		fd.close(true)
	}
	end

	# Store some locally-generated data as a file, similiar to store_loot.
	def report_store_local(ltype=nil, ctype=nil, data=nil, filename=nil)
		store_local(ltype,ctype,data,filename)
	end

	#
	# Database management
	#

	def db_check_driver
		if(not framework.db.driver)
			print_error("No database driver installed. Try 'gem install pg'")
			return false
		end
		true
	end

	#
	# Is everything working?
	#
	def cmd_db_status(*args)
		return if not db_check_driver
		if ::ActiveRecord::Base.connected?
			cdb = ""
			::ActiveRecord::Base.connection_pool.with_connection { |conn|
				if conn.respond_to? :current_database
					cdb = conn.current_database
				end
			}
			print_status("#{framework.db.driver} connected to #{cdb}")
		else
			print_status("#{framework.db.driver} selected, no connection")
		end
	end

	def cmd_db_connect_help
		# Help is specific to each driver
		cmd_db_connect("-h")
	end

	def cmd_db_connect(*args)
		return if not db_check_driver
		if (args[0] == "-y")
			if (args[1] and not ::File.exists? ::File.expand_path(args[1]))
				print_error("File not found")
				return
			end
			file = args[1] || ::File.join(Msf::Config.get_config_root, "database.yml")
			if (::File.exists? ::File.expand_path(file))
				db = YAML.load(::File.read(file))['production']
				framework.db.connect(db)

				if framework.db.active and not framework.db.modules_cached
					print_status("Rebuilding the module cache in the background...")
					framework.threads.spawn("ModuleCacheRebuild", true) do
						framework.db.update_all_module_details
					end
				end

				return
			end
		end
		meth = "db_connect_#{framework.db.driver}"
		if(self.respond_to?(meth))
			self.send(meth, *args)
			if framework.db.active and not framework.db.modules_cached
				print_status("Rebuilding the module cache in the background...")
				framework.threads.spawn("ModuleCacheRebuild", true) do
					framework.db.update_all_module_details
				end
			end
		else
			print_error("This database driver #{framework.db.driver} is not currently supported")
		end
	end

	def cmd_db_disconnect_help
		print_line "Usage: db_disconnect"
		print_line
		print_line "Disconnect from the database."
		print_line
	end

	def cmd_db_disconnect(*args)
		return if not db_check_driver

		if(args[0] and (args[0] == "-h" || args[0] == "--help"))
			cmd_db_disconnect_help
			return
		end

		if (framework.db)
			framework.db.disconnect()
		end
	end

	def cmd_db_rebuild_cache
		unless framework.db.active
			print_error("The database is not connected")
			return
		end

		print_status("Purging and rebuilding the module cache in the background...")
		framework.threads.spawn("ModuleCacheRebuild", true) do
			framework.db.purge_all_module_details
			framework.db.update_all_module_details
		end
	end

	def cmd_db_rebuild_cache_help
		print_line "Usage: db_rebuild_cache"
		print_line
		print_line "Purge and rebuild the SQL module cache."
		print_line
	end

	#
	# Set RHOSTS in the +active_module+'s (or global if none) datastore from an array of addresses
	#
	# This stores all the addresses to a temporary file and utilizes the
	# <pre>file:/tmp/filename</pre> syntax to confer the addrs.  +rhosts+
	# should be an Array.  NOTE: the temporary file is *not* deleted
	# automatically.
	#
	def set_rhosts_from_addrs(rhosts)
		if rhosts.empty?
			print_status("The list is empty, cowardly refusing to set RHOSTS")
			return
		end
		if active_module
			mydatastore = active_module.datastore
		else
			# if there is no module in use set the list to the global variable
			mydatastore = self.framework.datastore
		end

		if rhosts.length > 5
			# Lots of hosts makes 'show options' wrap which is difficult to
			# read, store to a temp file
			rhosts_file = Rex::Quickfile.new("msf-db-rhosts-")
			mydatastore['RHOSTS'] = 'file:'+rhosts_file.path
			# create the output file and assign it to the RHOSTS variable
			rhosts_file.write(rhosts.join("\n")+"\n")
			rhosts_file.close
		else
			# For short lists, just set it directly
			mydatastore['RHOSTS'] = rhosts.join(" ")
		end

		print_line "RHOSTS => #{mydatastore['RHOSTS']}"
		print_line
	end

	def db_find_tools(tools)
		found   = true
		missed  = []
		tools.each do |name|
			if(! Rex::FileUtils.find_full_path(name))
				missed << name
			end
		end
		if(not missed.empty?)
			print_error("This database command requires the following tools to be installed: #{missed.join(", ")}")
			return
		end
		true
	end

	#
	# Database management: Postgres
	#

	#
	# Connect to an existing Postgres database
	#
	def db_connect_postgresql(*args)
		if(args[0] == nil or args[0] == "-h" or args[0] == "--help")
			print_status("   Usage: db_connect <user:pass>@<host:port>/<database>")
			print_status("      OR: db_connect -y [path/to/database.yml]")
			print_status("Examples:")
			print_status("       db_connect user@metasploit3")
			print_status("       db_connect user:pass@192.168.0.2/metasploit3")
			print_status("       db_connect user:pass@192.168.0.2:1500/metasploit3")
			return
		end

		info = db_parse_db_uri_postgresql(args[0])
		opts = { 'adapter' => 'postgresql' }

		opts['username'] = info[:user] if (info[:user])
		opts['password'] = info[:pass] if (info[:pass])
		opts['database'] = info[:name]
		opts['host'] = info[:host] if (info[:host])
		opts['port'] = info[:port] if (info[:port])

		opts['pass'] ||= ''

		# Do a little legwork to find the real database socket
		if(! opts['host'])
			while(true)
				done = false
				dirs = %W{ /var/run/postgresql /tmp }
				dirs.each do |dir|
					if(::File.directory?(dir))
						d = ::Dir.new(dir)
						d.entries.grep(/^\.s\.PGSQL.(\d+)$/).each do |ent|
							opts['port'] = ent.split('.')[-1].to_i
							opts['host'] = dir
							done = true
							break
						end
					end
					break if done
				end
				break
			end
		end

		# Default to loopback
		if(! opts['host'])
			opts['host'] = '127.0.0.1'
		end

		if (not framework.db.connect(opts))
			raise RuntimeError.new("Failed to connect to the database: #{framework.db.error}")
		end
	end

	def db_parse_db_uri_postgresql(path)
		res = {}
		if (path)
			auth, dest = path.split('@')
			(dest = auth and auth = nil) if not dest
			res[:user],res[:pass] = auth.split(':') if auth
			targ,name = dest.split('/')
			(name = targ and targ = nil) if not name
			res[:host],res[:port] = targ.split(':') if targ
		end
		res[:name] = name || 'metasploit3'
		res
	end

	##
	# Miscellaneous option helpers
	##

	#
	# Parse +arg+ into a RangeWalker and append the result into +host_ranges+
	#
	# Returns true if parsing was successful or nil otherwise.
	#
	# NOTE: This modifies +host_ranges+
	#
	def arg_host_range(arg, host_ranges, required=false)
		if (!arg and required)
			print_error("Missing required host argument")
			return
		end
		begin
			host_ranges << Rex::Socket::RangeWalker.new(arg)
		rescue
			print_error("Invalid host parameter, #{arg}.")
			return
		end
		return true
	end

	#
	# Parse +arg+ into an array of ports and append the result into +port_ranges+
	#
	# Returns true if parsing was successful or nil otherwise.
	#
	# NOTE: This modifies +port_ranges+
	#
	def arg_port_range(arg, port_ranges, required=false)
		if (!arg and required)
			print_error("Argument required for -p")
			return
		end
		begin
			port_ranges << Rex::Socket.portspec_to_portlist(arg)
		rescue
			print_error("Invalid port parameter, #{arg}.")
			return
		end
		return true
	end

	#
	# Takes +host_ranges+, an Array of RangeWalkers, and chunks it up into
	# blocks of 1024.
	#
	def each_host_range_chunk(host_ranges, &block)
		# Chunk it up and do the query in batches. The naive implementation
		# uses so much memory for a /8 that it's basically unusable (1.6
		# billion IP addresses take a rather long time to allocate).
		# Chunking has roughly the same perfomance for small batches, so
		# don't worry about it too much.
		host_ranges.each do |range|
			if range.nil? or range.length.nil?
				chunk = nil
				end_of_range = true
			else
				chunk = []
				end_of_range = false
				# Set up this chunk of hosts to search for
				while chunk.length < 1024 and chunk.length < range.length
					n = range.next_ip
					if n.nil?
						end_of_range = true
						break
					end
					chunk << n
				end
			end

			# The block will do some
			yield chunk

			# Restart the loop with the same RangeWalker if we didn't get
			# to the end of it in this chunk.
			redo unless end_of_range
		end
	end

end

end end end end