[rygel] core: Check Host arguments in EneergyManagement

[Jens Georg <jensgeorg src gnome org>]

commit b0e5f7109101b9317af564afff8571af17c5e2a1
Author: Parthiban Balasubramanian <p balasubramanian cablelabs com>
Date:   Fri Aug 15 20:19:35 2014 -0600

    core: Check Host arguments in EneergyManagement
    
    Fixed Host argument check before executing Ping, NSLookup, Traceroute

 src/librygel-core/rygel-basic-management.vala |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/src/librygel-core/rygel-basic-management.vala b/src/librygel-core/rygel-basic-management.vala
index 3916aac..2b2966e 100644
--- a/src/librygel-core/rygel-basic-management.vala
+++ b/src/librygel-core/rygel-basic-management.vala
@@ -251,6 +251,12 @@ public class Rygel.BasicManagement : Service {
                         typeof (uint),
                         out dscp);
 
+        if (host == "") {
+            message ("Ping action : Host is empty !");
+            action.return_error (402, _("Invalid argument"));
+            return;
+        }
+
         var ping = new BasicManagementTestPing (host,
                                                 repeat_count,
                                                 interval_time_out,
@@ -337,6 +343,12 @@ public class Rygel.BasicManagement : Service {
                         typeof (uint32),
                         out interval_time_out);
 
+        if (hostname == "") {
+            message ("NSLookup action : Host is empty !");
+            action.return_error (402, _("Invalid argument"));
+            return;
+        }
+
         var nslookup = new BasicManagementTestNSLookup (hostname,
                                                         dns_server,
                                                         repeat_count,
@@ -412,6 +424,12 @@ public class Rygel.BasicManagement : Service {
                         typeof (uint),
                         out dscp);
 
+        if (host == "") {
+            message ("Traceroute action : Host is empty !");
+            action.return_error (402, _("Invalid argument"));
+            return;
+        }
+
         var traceroute = new BasicManagementTestTraceroute (host,
                                                             wait_time_out,
                                                             data_block_size,