From: Andy Bavier <acb@cs.princeton.edu>
Date: Tue, 27 Oct 2009 21:18:12 +0000 (+0000)
Subject: Very basic Insert command
X-Git-Tag: sfa-0.9-6~94
X-Git-Url: http://git.onelab.eu/?p=sfa.git;a=commitdiff_plain;h=54723f230312171bc348159040e3a7b1be0af519

Very basic Insert command
---

diff --git a/sfatables/commands/Insert.py b/sfatables/commands/Insert.py
new file mode 100644
index 00000000..d4010920
--- /dev/null
+++ b/sfatables/commands/Insert.py
@@ -0,0 +1,65 @@
+import os, time
+import libxml2
+from sfatables.command import Command
+from sfatables.globals import *
+
+class Insert(Command):
+    def __init__(self):
+        self.options = [('-I','--insert')]
+        self.help = 'Insert a rule into a chain'
+        self.matches = True
+        self.targets = True
+        return
+
+    def call_gen(self, chain, type, dir, options, file_path):
+        filename = os.path.join(dir, options.name+".xml")
+        xmldoc = libxml2.parseFile(filename)
+    
+        p = xmldoc.xpathNewContext()
+
+        supplied_arguments = options.arguments
+        if (hasattr(options,'element') and options.element):
+            element = options.element
+        else:
+            element='*'
+
+        for option in supplied_arguments:
+            option_name = option['name']
+            option_value = getattr(options,option_name)
+
+            if (hasattr(options,option_name) and getattr(options,option_name)):
+                context = p.xpathEval("//rule[@element='%s' or @element='*']/argument[name='%s']"%(element, option_name))
+                if (not context):
+                    raise Exception('Unknown option %s for match %s and element %s'%(option,option['name'], element))
+                else:
+                    # Add the value of option
+                    valueNode = libxml2.newNode('value')
+                    valueNode.addContent(option_value)
+                    context[0].addChild(valueNode)
+
+        if not os.path.isdir(os.path.dirname(file_path)):
+            os.makedirs(os.path.dirname(file_path))
+        xmldoc.saveFile(file_path)
+        p.xpathFreeContext()
+        xmldoc.freeDoc()
+
+        return True
+
+    def call(self, command_options, match_options, target_options):
+        if (len(command_options.args)<2):
+            print "Please specify the chain and the rule number to insert, e.g. sfatables -I INCOMING 1 -- ...."
+            return
+
+        chain = command_options.args[0]
+
+        rule_number = command_options.args[1]
+        chain_dir = sfatables_config + "/" + chain
+
+        match_path = chain_dir + "/" + "sfatables-%s-match"%rule_number
+        target_path = chain_dir + "/" + "sfatables-%s-target"%rule_number
+
+        ret = self.call_gen(chain, 'match',match_dir, match_options, match_path)
+        if (ret):
+            ret = self.call_gen(chain, 'target',target_dir, target_options, target_path)
+
+        return ret
diff --git a/sfatables/commands/__init__.py b/sfatables/commands/__init__.py
index 7f95863b..273696c1 100644
--- a/sfatables/commands/__init__.py
+++ b/sfatables/commands/__init__.py
@@ -1,6 +1,7 @@
 all = """
 Add
 Delete
+Insert
 List
 SetDefault
 """.split()