make blank target null

jc/parsers/iptables.py

@@ -25,7 +25,7 @@
             "num"               integer,
             "pkts":             integer,
             "bytes":            integer,  # converted based on suffix
-            "target":           string,
+            "target":           string,   # Null if blank
             "prot":             string,
             "opt":              string,   # "--" = Null
             "in":               string,
@@ -222,6 +222,10 @@ def _process(proc_data):
                 if rule['opt'] == '--':
                     rule['opt'] = None
 
+            if 'target' in rule:
+                if rule['target'] == '':
+                    rule['target'] = None
+
     return proc_data
 
 
@@ -278,6 +282,8 @@ def parse(data, raw=False, quiet=False):
                 rule = line.split(maxsplit=len(headers) - 1)
                 temp_rule = dict(zip(headers, rule))
                 if temp_rule:
+                    if temp_rule.get('target') == '\u2063':
+                        temp_rule['target'] = ''
                     chain['rules'].append(temp_rule)
 
         if chain:

tests/fixtures/generic/iptables-no-jump.json

@@ -0,0 +1 @@
+[{"chain":"INPUT","rules":[{"target":null,"prot":"udp","opt":null,"source":"anywhere","destination":"anywhere"}]}]

tests/fixtures/generic/iptables-no-jump.out

@@ -0,0 +1,4 @@
+Chain INPUT (policy ACCEPT)
+target     prot opt source               destination
+           udp  --  anywhere             anywhere
+

tests/test_iptables.py

@@ -45,6 +45,9 @@ class MyTests(unittest.TestCase):
     with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/iptables-raw.out'), 'r', encoding='utf-8') as f:
         ubuntu_18_4_iptables_raw = f.read()
 
+    with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/generic/iptables-no-jump.out'), 'r', encoding='utf-8') as f:
+        generic_iptables_no_jump = f.read()
+
     # output
     with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/iptables-filter.json'), 'r', encoding='utf-8') as f:
         centos_7_7_iptables_filter_json = json.loads(f.read())
@@ -82,6 +85,9 @@ class MyTests(unittest.TestCase):
     with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/ubuntu-18.04/iptables-raw.json'), 'r', encoding='utf-8') as f:
         ubuntu_18_4_iptables_raw_json = json.loads(f.read())
 
+    with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/generic/iptables-no-jump.json'), 'r', encoding='utf-8') as f:
+        generic_iptables_no_jump_json = json.loads(f.read())
+
 
     def test_iptables_nodata(self):
         """
@@ -161,6 +167,12 @@ def test_iptables_raw_ubuntu_18_4(self):
         """
         self.assertEqual(jc.parsers.iptables.parse(self.ubuntu_18_4_iptables_raw, quiet=True), self.ubuntu_18_4_iptables_raw_json)
 
+    def test_iptables_no_jump_generic(self):
+        """
+        Test 'sudo iptables' with no jump target
+        """
+        self.assertEqual(jc.parsers.iptables.parse(self.generic_iptables_no_jump, quiet=True), self.generic_iptables_no_jump_json)
+
 
 if __name__ == '__main__':
     unittest.main()