From 8fc462f76125ef9201367133393bb87ccd8a22b0 Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <julian.klode@canonical.com>
Date: Tue, 12 Oct 2021 12:01:50 +0200
Subject: [PATCH] gnetworkmonitornm: Stop using removed PropertiesChanged
 signal

Use the org.freedesktop.DBus.Properties interface to listen
to PropertiesChanged signals on /org/freedesktop/NetworkManager.

NetworkManager used to provide its own legacy PropertiesChanged
signal, but that was dropped in
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/853

This requires NetworkManager >= 1.2 (2016)

Fixes: #2505
Bug-Ubuntu: https://bugs.launchpad.net/bugs/1946196
---
 gio/gnetworkmonitornm.c | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/gio/gnetworkmonitornm.c b/gio/gnetworkmonitornm.c
index 5a36a0ba1..6a6d1d666 100644
--- a/gio/gnetworkmonitornm.c
+++ b/gio/gnetworkmonitornm.c
@@ -267,29 +267,14 @@ update_cached_property (GDBusProxy   *proxy,
 }
 
 static void
-proxy_signal_cb (GDBusProxy        *proxy,
-                 const gchar       *sender_name,
-                 const gchar       *signal_name,
-                 GVariant          *parameters,
-                 GNetworkMonitorNM *nm)
+proxy_properties_changed_cb (GDBusProxy        *proxy,
+                             GVariant          *changed_properties,
+                             GStrv              invalidated_properties,
+                             GNetworkMonitorNM *nm)
 {
-  GVariant *asv;
   GVariantDict *dict;
 
-  if (g_strcmp0 (signal_name, "PropertiesChanged") != 0)
-    return;
-
-  g_variant_get (parameters, "(@a{sv})", &asv);
-  if (!asv)
-    return;
-
-  dict = g_variant_dict_new (asv);
-  g_variant_unref (asv);
-  if (!dict)
-    {
-      g_warning ("Failed to handle PropertiesChanged signal from NetworkManager");
-      return;
-    }
+  dict = g_variant_dict_new (changed_properties);
 
   update_cached_property (nm->priv->proxy, "Connectivity", dict);
 
@@ -361,8 +346,8 @@ g_network_monitor_nm_initable_init (GInitable     *initable,
       return FALSE;
     }
 
-  nm->priv->signal_id = g_signal_connect (G_OBJECT (proxy), "g-signal",
-                                          G_CALLBACK (proxy_signal_cb), nm);
+  nm->priv->signal_id = g_signal_connect (G_OBJECT (proxy), "g-properties-changed",
+                                          G_CALLBACK (proxy_properties_changed_cb), nm);
   nm->priv->proxy = proxy;
   sync_properties (nm, FALSE);