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# -*- coding: binary -*-
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# Copyright (c) 2010, [email protected]
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#     * Redistributions of source code must retain the above copyright
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#       notice, this list of conditions and the following disclaimer.
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#     * Redistributions in binary form must reproduce the above copyright
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#       notice, this list of conditions and the following disclaimer in the
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#       documentation and/or other materials provided with the distribution.
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#     * The names of the author may not be used to endorse or promote products
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#       derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL [email protected] BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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require 'pp'
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require 'enumerator'
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require 'rex/post/meterpreter/extensions/stdapi/railgun/tlv'
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require 'rex/post/meterpreter/extensions/stdapi/railgun/library_helper'
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require 'rex/post/meterpreter/extensions/stdapi/railgun/buffer_item'
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module Rex
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module Post
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module Meterpreter
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module Extensions
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module Stdapi
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module Railgun
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# A easier way to call multiple functions in a single request
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class MultiCaller
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  include LibraryHelper
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  def initialize(client, parent, consts_mgr)
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    @parent = parent
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    @client = client
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    # needed by LibraryHelper
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    @consts_mgr = consts_mgr
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  end
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  def call(functions)
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    request = Packet.create_request(COMMAND_ID_STDAPI_RAILGUN_API_MULTI)
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    function_results = []
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    call_layouts          = []
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    functions.each do |f|
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      lib_name, function, args = f
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      library = @parent.get_library(lib_name)
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      unless library
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        raise "Library #{lib_name} has not been loaded"
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      end
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      unless function.instance_of? LibraryFunction
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        function = library.functions[function]
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        unless function
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          raise "Library #{lib_name} function #{function} has not been defined"
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        end
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      end
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      raise "#{function.params.length} arguments expected. #{args.length} arguments provided." unless args.length == function.params.length
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      group, layouts = library.build_packet_and_layouts(
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        Rex::Post::Meterpreter::GroupTlv.new(TLV_TYPE_RAILGUN_MULTI_GROUP),
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        function,
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        args,
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        @client.native_arch
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      )
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      request.tlvs << group
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      call_layouts << layouts
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    end
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    call_results = []
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    res = @client.send_request(request)
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    res.each(TLV_TYPE_RAILGUN_MULTI_GROUP) do |val|
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      call_results << val
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    end
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    functions.each do |f|
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      lib_name, function, args = f
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      library = @parent.get_library(lib_name)
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      function = library.functions[function] unless function.instance_of? LibraryFunction
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      function_results << library.build_response(call_results.shift, function, call_layouts.shift, @client)
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    end
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    function_results
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  end
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  # process_multi_function_call
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end # MultiCall
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end; end; end; end; end; end
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