class SFATablesRules:
def __init__(self, chain_name):
+ self.active_context = {}
self.contexts = None # placeholder for rspec_manger
self.sorted_rule_list = []
chain_dir_path = os.path.join(sfatables_config,chain_name)
rule_list = List().get_rule_list(chain_dir_path)
for rule_number in rule_list:
- self.sorted_rule_list.append(XMLRule(chain_name, rule_number))
+ self.sorted_rule_list = self.sorted_rule_list + [XMLRule(chain_name, rule_number)]
return
def set_context(self, request_context):
+ self.active_context = request_context
return
+ def create_xml_node(self, name, context_dict):
+ node = libxml2.newNode(name)
+ for k in context_dict.keys():
+ if (type(context_dict[k])==dict):
+ childNode = self.create_xml_node(k, context_dict[k])
+ node.addChild(childNode)
+ else:
+ node.addContent(context_dict[k])
+ return node
+
+ def add_request_context_to_rspec(self, doc):
+ p = doc.xpathNewContext()
+ context = p.xpathEval("//rspec")
+ if (not context):
+ raise Exception('Request is not an rspec')
+ else:
+ # Add the request context
+ requestNode = self.create_xml_node('request-context',self.active_context)
+ context[0].addChild(requestNode)
+ p.xpathFreeContext()
+ return doc
+
+ def add_rule_context_to_rspec(self,arguments, doc):
+ p = doc.xpathNewContext()
+ context = p.xpathEval("//rspec")
+ if (not context):
+ raise Exception('Request is not an rspec')
+ else:
+ # Add the request context
+ ruleNode = libxml2.newNode('rule-context')
+ ac = self.active_context
+ for k in ac:
+ argumentNode = libxml2.newNode('argument')
+ nameNode = libxml2.newNode('name')
+ nameNode.addContent(k)
+ valueNode = libxml2.newNode('value')
+ valueNode.addContent(ac[k])
+ argumentNode.addChild(nameNode)
+ argumentNode.addChild(valueNode)
+ ruleNode.addChild(argumentNode)
+ context[0].addChild(ruleNode)
+ p.xpathFreeContext()
+
+ return doc
+
def apply(self, rspec):
doc = libxml2.parseDoc(rspec)
+ doc = self.add_request_context_to_rspec(doc)
+
intermediate_rspec = doc
+
for rule in self.sorted_rule_list:
intermediate_rspec = rule.apply_interpreted(intermediate_rspec)
if (rule.terminal):
def main():
incoming = SFATablesRules('INCOMING')
- outgoing = SFATablesRules('OUTGOING')
+ incoming.set_context({'sfa':{'user':{'hrn':'plc.princeton.sapanb'}}})
+ outgoing = SFATablesRules('OUTGOING')
print "%d rules loaded for INCOMING chain"%len(incoming.sorted_rule_list)
+ print incoming.sorted_rule_list[0].processors
+
print "%d rules loaded for OUTGOING chain"%len(outgoing.sorted_rule_list)
+ print outgoing.sorted_rule_list[0].processors
rspec = open(sys.argv[1]).read()
newrspec = incoming.apply(rspec)