samba-tool visualize ntdsconn: add --importldif option

This visualizes the NTDSConnections in an LDIF file exported via
`samba_kcc --exportldif`. This functionality is already available in a
roundabout way -- you can use `samba_kcc --import_ldif`, and use the
DB that generates. This just shortens the process.

The ldif import/export feature is useful for analysing AD networks
offsite without exposing too much sensitive data.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

python/samba/tests/samba_tool/visualize.py

@@ -122,6 +122,22 @@ class SambaToolVisualizeLdif(SambaToolCmdTest):
 
             self.assertStringsEqual(monochrome, uncoloured, strip=True)
 
+    def test_import_ldif(self):
+        """Make sure the samba-tool visualize --importldif option gives the
+        same output as using the externally generated db from the same
+        LDIF."""
+        result, s1, err = self.runsubcmd("visualize", "ntdsconn",
+                                         '-H', self.dburl,
+                                         '--color=no', '-S')
+        self.assertCmdSuccess(result, s1, err)
+
+        result, s2, err = self.runsubcmd("visualize", "ntdsconn",
+                                         '--importldif', MULTISITE_LDIF,
+                                         '--color=no', '-S')
+        self.assertCmdSuccess(result, s2, err)
+
+        self.assertStringsEqual(s1, s2)
+
     def test_output_file(self):
         """Check that writing to a file works, with and without
         --color=auto."""