Class: Msf::OptAddressLocal

Inherits:
OptAddress show all
Defined in:
lib/msf/core/opt_address_local.rb

Overview

Local network address option.

Instance Attribute Summary

Attributes inherited from OptBase

#advanced, #aliases, #conditions, #default, #desc, #enums, #evasion, #fallbacks, #max_length, #name, #owner, #regex, #required

Instance Method Summary collapse

Methods inherited from OptAddress

#type

Methods inherited from OptBase

#advanced?, #display_value, #empty_required_value?, #evasion?, #initialize, #invalid_value_length?, #required?, #type?, #validate_on_assignment?

Constructor Details

This class inherits a constructor from Msf::OptBase

Instance Method Details

#interfaces ⇒ Object 



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# File 'lib/msf/core/opt_address_local.rb', line 12

def interfaces
  begin
    NetworkInterface.interfaces || []
  rescue NetworkInterface::Error => e
    elog(e)
    []
  end
end

#normalize(value) ⇒ Object 



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# File 'lib/msf/core/opt_address_local.rb', line 21

def normalize(value)
  return unless value.kind_of?(String)
  return value unless interfaces.include?(value)

  addrs = NetworkInterface.addresses(value).values.flatten

  # Strip interface name from address (see getifaddrs(3))
  addrs = addrs.map { |x| x['addr'].split('%').first }.select do |addr|
    begin
      IPAddr.new(addr)
    rescue IPAddr::Error
      false
    end
  end

  # Sort for deterministic normalization; preference ipv4 addresses followed by their value
  sorted_addrs = addrs.sort_by { |addr| ip_addr = IPAddr.new(addr); [ip_addr.ipv4? ? 0 : 1, ip_addr.to_i] }

  sorted_addrs.any? ? sorted_addrs.first : ''
end

#valid?(value, check_empty: true) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/msf/core/opt_address_local.rb', line 42

def valid?(value, check_empty: true)
  return false if check_empty && empty_required_value?(value)
  return false unless value.kind_of?(String) || value.kind_of?(NilClass)

  return true if interfaces.include?(value)

  super
end