sfatables/commands/Add.py

   1 import os, time
   2 import libxml2
   3 from sfatables.command import Command
   4 from sfatables.globals import *
   5
   6 class Add(Command):
   7     options = [('-A','--add')]
   8     help = 'Add a rule to a chain'
   9     matches = True
  10     targets = True
  11
  12     def __init__(self):
  13         return
  14
  15     def getnextfilename(self,type,chain):
  16         dir = sfatables_config + chain;
  17         last_rule_number = 1
  18
  19         for (root, dirs, files) in os.walk(dir):
  20             for file in files:
  21                 if (file.startswith('sfatables-')):
  22                     number_str = file.split('-')[1]
  23                     number = int(number_str)
  24                     if (number>last_rule_number):
  25                         last_rule_number = number
  26
  27         return "sfatables-%d-%s"%(last_rule_number+1,type)
  28
  29     def call(self, command_options, match_options, target_options):
  30         filename = match_dir + "/"+match_options.match_name+".xml"
  31         xmldoc = libxml2.parseFile(filename)
  32
  33         p = xmldoc.xpathNewContext()
  34
  35         supplied_arguments = match_options.arguments
  36         for option in supplied_arguments:
  37             option_name = option['name']
  38             option_value = getattr(match_options,option_name)
  39
  40             if (hasattr(match_options,option_name)):
  41                 context = p.xpathEval("//rule/argument[name='%s']"%option_name)
  42                 import pdb
  43                 pdb.set_trace()
  44                 if (not context):
  45                     raise Exception('Unknown option %s for match %s'%(option,option['name']))
  46                 else:
  47                     # Add the value of option
  48                     valueNode = libxml2.newNode('value')
  49                     valueNode.addContent(option_value)
  50                     context[0].addChild(valueNode)
  51
  52         chain = command_options.args[0]
  53         filename = self.getnextfilename('match',chain)
  54         file_path = sfatables_config + '/' + chain + '/' + filename
  55         xmldoc.saveFile(file_path)
  56         p.xpathFreeContext()
  57         xmldoc.freeDoc()
  58
  59         return True