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# -*- coding: binary -*-
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module Msf
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###
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#
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# This module provides methods for working with the IAX2 protocol
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#
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###
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module Auxiliary::IAX2
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  #
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  # Initializes an instance of an auxiliary module that uses IAX2
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  #
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  def initialize(info = {})
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    super
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    register_options(
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      [
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        OptAddress.new('IAX_HOST', [true, 'The IAX2 server to communicate with']),
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        OptPort.new('IAX_PORT',    [true, 'The IAX2 server port', 4569]),
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        OptString.new('IAX_USER',  [false, 'An optional IAX2 username']),
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        OptString.new('IAX_PASS',  [false, 'An optional IAX2 password']),
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        OptString.new('IAX_CID_NAME',  [false, 'The default caller ID name', '']),
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        OptString.new('IAX_CID_NUMBER',  [true, 'The default caller ID number', '15555555555'])
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      ], Msf::Auxiliary::IAX2 )
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    register_advanced_options(
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      [
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        OptBool.new('IAX_DEBUG', [false, 'Enable IAX2 debugging messages', false])
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      ], Msf::Auxiliary::IAX2 )
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  end
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  def connect
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    @iax.shutdown if @iax
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    @iax = Rex::Proto::IAX2::Client.new(
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      :server_host    => datastore['IAX_HOST'],
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      :username       => datastore['IAX_USER'],
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      :password       => datastore['IAX_PASS'],
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      :caller_name    => datastore['IAX_CID_NAME'],
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      :caller_number  => datastore['IAX_CID_NUMBER'],
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      :debugging      => datastore['IAX_DEBUG'],
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      :context        => {
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        'Msf'        => framework,
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        'MsfExploit' => self
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      }
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    )
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    @iax_reg = @iax.create_call()
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    r = @iax_reg.register
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    if not r
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      @iax.shutdown
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      @iax = nil
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      raise RuntimeError, "Failed to register with the server"
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    end
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  end
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  def create_call
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    if not @iax
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      raise RuntimeError, "No active IAX2 connection"
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    end
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    @iax.create_call
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  end
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  def cleanup
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    super
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    @iax.shutdown if @iax
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  end
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  # General purpose phone number mangling routines
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  # Convert 123456XXXX to an array of expanded numbers
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  def crack_phone_range(range)
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    crack_phone_ranges([range])
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  end
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  def crack_phone_ranges(masks)
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    res = {}
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    masks.each do |mask|
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      mask = mask.strip
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      if(mask.index(':'))
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        next if mask.index('X')
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        rbeg,rend = mask.split(':').map{|c| c.gsub(/[^\d]/, '').to_i }
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        rbeg.upto(rend) do |n|
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          res[n.to_s] = {}
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        end
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        next
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      end
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      incdigits = 0
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      mask.each_char do |c|
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        incdigits += 1 if c =~ /^[X#]$/i
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      end
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      max = (10**incdigits)-1
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      (0..max).each do |num|
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        number = mask.dup # copy the mask
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        numstr = sprintf("%0#{incdigits}d", num) # stringify our incrementing number
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        j = 0 # index for numstr
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        for i in 0..number.length-1 do # step through the number (mask)
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          if number[i].chr =~ /^[X#]$/i
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            number[i] = numstr[j] # replaced masked indexes with digits from incrementing number
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            j += 1
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          end
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        end
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        res[number] = {}
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      end
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    end
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    return res.keys.sort
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  end
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end
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end
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