add a rescue around modifier inclusion & stub out a dos modifier

git-svn-id: file:///home/svn/framework3/trunk@14071 4d416f70-5f16-0410-b530-b9f4589650da

lib/lab/modifier/dos_modifier.rb

@@ -0,0 +1,14 @@
+# This assumes you're on a recent ubuntu
+# TODO - enforce this, or split it out...
+
+module Lab
+module Modifier
+module Dos
+
+	def ping(target)
+		run_command("ping #{filter_input(target)}")
+	end
+
+end
+end
+end

lib/lab/modifiers.rb

@@ -1,3 +1,4 @@
 require 'modifier/test_modifier'
 require 'modifier/backtrack5_modifier'
 require 'modifier/meterpreter_modifier'
+require 'modifier/dos_modifier'	

lib/lab/vm.rb

@@ -102,7 +102,11 @@ class Vm
 		@modifiers = config['modifiers']
 		
 		if @modifiers	
- 			@modifiers.each { |modifier|  self.class.send(:include, eval("Lab::Modifier::#{modifier}"))}
+			begin
+	 			@modifiers.each { |modifier|  self.class.send(:include, eval("Lab::Modifier::#{modifier}"))}
+			rescue Exception => e
+				# modifier likely didn't exist
+			end 		
 		end
 	end