[network-manager-netbook] Make sure to not add duplicate Ethernet connections.

[Tambet Ingo <tambeti src gnome org>]

commit f79eec06c3151f197e9c7c91cbcfa12fb4f37d15
Author: Tambet Ingo <tambet gmail com>
Date:   Thu Sep 24 12:20:50 2009 +0300

    Make sure to not add duplicate Ethernet connections.
    
    There's a race condition that sometimes we get two signals (carrier changed,
    device state changed) and as a result, add two items for one ethernet device/
    exported connection combo.

 src/nmn-ethernet-handler.c |   19 ++++++++++++++++++-
 1 files changed, 18 insertions(+), 1 deletions(-)
---
diff --git a/src/nmn-ethernet-handler.c b/src/nmn-ethernet-handler.c
index 7a77e60..d8430c7 100644
--- a/src/nmn-ethernet-handler.c
+++ b/src/nmn-ethernet-handler.c
@@ -47,6 +47,22 @@ nmn_ethernet_handler_new (NmnNMData *nm_data,
                                              NULL));
 }
 
+static gboolean
+have_item_for_connection (NmnDeviceHandler *handler,
+                          NMExportedConnection *exported)
+{
+    GSList *list;
+    GSList *iter;
+
+    list = nmn_device_handler_get_items (handler);
+    for (iter = list; iter; iter = iter->next) {
+        if (nmn_network_item_get_connection (NMN_NETWORK_ITEM (iter->data)) == exported)
+            return TRUE;
+    }
+ 
+    return FALSE;
+}
+
 static void
 connection_added (NmnDeviceHandler *handler,
                   NMExportedConnection *exported)
@@ -60,7 +76,8 @@ connection_added (NmnDeviceHandler *handler,
         return;
 
     wrapped = nm_exported_connection_get_connection (exported);
-    if (utils_connection_valid_for_device (wrapped, NM_DEVICE (device), NULL)) {
+    if (utils_connection_valid_for_device (wrapped, NM_DEVICE (device), NULL) &&
+        !have_item_for_connection (handler, exported)) {
         item = nmn_ethernet_item_new (nmn_device_handler_get_nm_data (handler), device);
         g_object_set (item, NMN_NETWORK_ITEM_CONNECTION, exported, NULL);
         nmn_device_handler_add_item (handler, NMN_NETWORK_ITEM (item));