class PacketFu::Config

The Config class holds various bits of useful default information for packet creation. If initialized without arguments, @iface will be set to ENV or Pcap.lookupdev (or lo), and the @pcapfile will be set to “/tmp/out.pcap” # (yes, it’s Linux-biased, sorry, fixing this is a TODO.)

Any number of instance variables can be passed in to the intialize function (as a hash), though only the expected network-related variables will be readable and writeable directly.

Examples

PacketFu::Config.new(:ip_saddr => "1.2.3.4").ip_saddr #=> "1.2.3.4"
PacketFu::Config.new(:foo=>"bar").foo #=> NomethodError: undefined method `foo'...

The config() function, however, does provide access to custom variables:

PacketFu::Config.new(:foo=>"bar").config[:foo] #=> "bar"
obj = PacketFu::Config.new(:foo=>"bar")
obj.config(:baz => "bat")
obj.config #=> {:iface=>"eth0", :baz=>"bat", :pcapfile=>"/tmp/out.pcap", :foo=>"bar"}

Attributes

eth_daddr[RW]
eth_dst[RW]
eth_saddr[RW]
eth_src[RW]
iface[RW]
ip_saddr[RW]
ip_src[RW]
pcapfile[RW]

Public Class Methods

new(args={}) click to toggle source
# File lib/packetfu/config.rb, line 34
def initialize(args={})
  if Process.euid.zero?
    @iface = args[:iface] || ENV['IFACE'] || Pcap.lookupdev || "lo" 
  end
  @pcapfile = "/tmp/out.pcap"
  args.each_pair { |k,v| self.instance_variable_set(("@#{k}"),v) }
end

Public Instance Methods

config(arg=nil) click to toggle source

Returns all instance variables as a hash (including custom variables set at initialization).

# File lib/packetfu/config.rb, line 43
def config(arg=nil)
  if arg
    arg.each_pair {|k,v| self.instance_variable_set(("@" + k.to_s).intern, v)}
  else
    config_hash = {}
    self.instance_variables.each do |v|
      key = v.to_s.gsub(/^@/,"").to_sym
      config_hash[key] = self.instance_variable_get(v)
    end
    config_hash
  end
end