4 from sfatables.globals import sfatables_config
5 from sfatables.pretty import Pretty
6 from sfatables.command import Command
11 self.options = [('-L','--list')]
12 self.help = 'List a chain'
19 def get_info(self, type, xmlextension_path):
20 xmldoc = libxml2.parseFile(xmlextension_path)
21 p = xmldoc.xpathNewContext()
23 ext_name_node = p.xpathEval("/%s/@name"%type)
24 ext_name = ext_name_node[0].content
26 name_nodes = p.xpathEval("//rule/argument[value!='']/name")
27 value_nodes = p.xpathEval("//rule/argument[value!='']/value")
28 element_nodes = p.xpathEval("//argument[value!='']/parent::rule/@element")
30 if (len(element_nodes)>1):
31 raise Exception("Invalid rule %s contains multiple elements."%xmlextension_path)
36 element = element_nodes[0].content
38 names = [n.content for n in name_nodes]
39 values = [v.content for v in value_nodes]
41 name_values = zip(names,values)
42 name_value_pairs = map(lambda (n,v):n+'='+v, name_values)
44 argument_str = ",".join(name_value_pairs)
49 return {'name':ext_name, 'arguments':argument_str, 'element':element}
51 def get_rule_list(self, chain_dir_path):
52 broken_semantics = os.walk(chain_dir_path)
55 for (root, dirs, files) in broken_semantics:
57 if (file.startswith('sfatables')):
58 (magic,number,type) = file.split('-')
59 rule_numbers[int(number)]=1
61 rule_list = rule_numbers.keys()
65 def call(self, command_options, match_options, target_options):
66 if (len(command_options.args) < 1):
67 print "Please specify the name of the chain you would like to list, e.g. sfatables -L INCOMING."
70 chain = command_options.args[0]
71 chain_dir = os.path.join(sfatables_config, chain)
73 rule_list = self.get_rule_list(chain_dir)
75 pretty = Pretty(['Rule','Match','Arguments','Target','Element','Arguments'])
77 for number in rule_list:
78 match_file = "sfatables-%d-%s"%(number,'match')
79 target_file = "sfatables-%d-%s"%(number,'target')
81 match_path = sfatables_config + '/' + chain + '/' + match_file
82 target_path = sfatables_config + '/' + chain + '/' + target_file
84 match_info = self.get_info ('match',match_path)
85 target_info = self.get_info ('target',target_path)
87 pretty.push_row(["%d"%number,
89 match_info['arguments'],
91 target_info['element'],
92 target_info['arguments']])