From ac59ce7442c58f503368d55a0eefd3ea92fbcfd8 Mon Sep 17 00:00:00 2001
From: Sapan Bhatia <sapanb@cs.princeton.edu>
Date: Mon, 26 Oct 2009 13:26:53 +0000
Subject: [PATCH] Insert the current context into the rspec for the rules to
 operate.

---
 sfatables/runtime.py    | 29 ++++++++++++++++++++++++++++-
 sfatables/test.sfarspec |  1 -
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/sfatables/runtime.py b/sfatables/runtime.py
index e2b57877..bdace139 100644
--- a/sfatables/runtime.py
+++ b/sfatables/runtime.py
@@ -13,7 +13,7 @@ from sfatables.xmlrule import *
 
 class SFATablesRules:
     def __init__(self, chain_name):
-        self.active_context = None
+        self.active_context = {}
         self.contexts = None # placeholder for rspec_manger
         self.sorted_rule_list = []
         chain_dir_path = os.path.join(sfatables_config,chain_name)
@@ -27,8 +27,35 @@ class SFATablesRules:
         self.active_context = request_context
         return
 
+    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
+            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:
diff --git a/sfatables/test.sfarspec b/sfatables/test.sfarspec
index ec9c3626..9714e236 100644
--- a/sfatables/test.sfarspec
+++ b/sfatables/test.sfarspec
@@ -22,4 +22,3 @@
         </nodespec>
     </request>
 </rspec>
-ec>
-- 
2.43.0