nat: dslite ce mode in separate config entry

Previously dslite was moved to separate plugin folder
and CE mode was removed. But it still needed.
This patch adds CE option to separate config entry

Type: feature

Signed-off-by: Vladimir Ratnikov <vratnikov@netgate.com>
Change-Id: If153ae08fa385ba5a6605cb412e49bbb4d1db46c

src/plugins/nat/dslite/dslite.c

@@ -114,6 +114,21 @@ dslite_set_ce (dslite_main_t * dm, u8 set)
   dm->is_ce = (set != 0);
 }
 
+static clib_error_t *
+dslite_config (vlib_main_t * vm, unformat_input_t * input)
+{
+  dslite_main_t *dm = &dslite_main;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "ce"))
+	dslite_set_ce (dm, 1);
+    }
+  return 0;
+}
+
+VLIB_CONFIG_FUNCTION (dslite_config, "dslite");
+
 int
 dslite_set_aftr_ip6_addr (dslite_main_t * dm, ip6_address_t * addr)
 {

src/plugins/nat/test/test_dslite.py

@@ -231,13 +231,13 @@ class TestDSlite(VppTestCase):
         self.logger.info(self.vapi.cli("show dslite sessions"))
 
 
-class TestDSliteCE():
+class TestDSliteCE(VppTestCase):
     """ DS-Lite CE Test Cases """
 
     @classmethod
     def setUpConstants(cls):
         super(TestDSliteCE, cls).setUpConstants()
-        cls.vpp_cmdline.extend(["nat", "{", "dslite ce", "}"])
+        cls.vpp_cmdline.extend(["dslite", "{", "ce", "}"])
 
     @classmethod
     def setUpClass(cls):
@@ -264,8 +264,9 @@ class TestDSliteCE():
     def test_dslite_ce(self):
         """ Test DS-Lite CE """
 
-        nat_config = self.vapi.nat_show_config()
-        self.assertEqual(1, nat_config.dslite_ce)
+        # TODO: add message to retrieve dslite config
+        # nat_config = self.vapi.nat_show_config()
+        # self.assertEqual(1, nat_config.dslite_ce)
 
         b4_ip4 = '192.0.0.2'
         b4_ip6 = '2001:db8:62aa::375e:f4c1:1'