From 1bb00ae66a5dda8a2f3f298d64a2e06d4be4cfc8 Mon Sep 17 00:00:00 2001
From: Marius Vollmer <mvollmer@redhat.com>
Date: Thu, 15 Sep 2016 23:34:24 +0300
Subject: [PATCH] manager: Add "Capabilities" property

---
 introspection/nm-manager.xml   |  9 +++++
 libnm-core/nm-dbus-interface.h |  8 +++++
 libnm/libnm.ver                |  1 +
 src/nm-manager.c               | 60 +++++++++++++++++++++++++++++++++-
 src/nm-manager.h               |  3 ++
 5 files changed, 80 insertions(+), 1 deletion(-)

diff --git a/introspection/nm-manager.xml b/introspection/nm-manager.xml
index cf178c3951..9893556e56 100644
--- a/introspection/nm-manager.xml
+++ b/introspection/nm-manager.xml
@@ -380,6 +380,15 @@
     -->
     <property name="Version" type="s" access="read"/>
 
+    <!--
+        Capabilities:
+
+        The current set of capabilities. See <link
+        linkend="NMCapability">NMCapability</link> for currently
+        defined capability numbers.
+    -->
+    <property name="Capabilities" type="ai" access="read"/>
+
     <!--
         State:
 
diff --git a/libnm-core/nm-dbus-interface.h b/libnm-core/nm-dbus-interface.h
index e5b1b3d6b8..1e69cd0dac 100644
--- a/libnm-core/nm-dbus-interface.h
+++ b/libnm-core/nm-dbus-interface.h
@@ -83,6 +83,14 @@
 #define NM_DBUS_INTERFACE_SECRET_AGENT    NM_DBUS_INTERFACE ".SecretAgent"
 #define NM_DBUS_PATH_SECRET_AGENT         "/org/freedesktop/NetworkManager/SecretAgent"
 
+/**
+ * NMCapability:
+ *
+ * #NMCapability names the numbers in the Capabilities property.
+ **/
+typedef enum {
+} NMCapability;
+
 /**
  * NMState:
  * @NM_STATE_UNKNOWN: networking state is unknown
diff --git a/libnm/libnm.ver b/libnm/libnm.ver
index cc2fc7df62..baaaa8a00f 100644
--- a/libnm/libnm.ver
+++ b/libnm/libnm.ver
@@ -752,6 +752,7 @@ global:
 	nm_simple_connection_new_clone;
 	nm_simple_connection_new_from_dbus;
 	nm_state_get_type;
+	nm_capability_get_type;
 	nm_utils_ap_mode_security_valid;
 	nm_utils_bin2hexstr;
 	nm_utils_check_virtual_device_compatibility;
diff --git a/src/nm-manager.c b/src/nm-manager.c
index 836ab76857..4983da51af 100644
--- a/src/nm-manager.c
+++ b/src/nm-manager.c
@@ -100,6 +100,8 @@ typedef struct {
 } RadioState;
 
 typedef struct {
+	GArray *capabilities;
+
 	GSList *active_connections;
 	GSList *authorizing_connections;
 	guint ac_cleanup_id;
@@ -180,6 +182,7 @@ static guint signals[LAST_SIGNAL] = { 0 };
 
 NM_GOBJECT_PROPERTIES_DEFINE (NMManager,
 	PROP_VERSION,
+	PROP_CAPABILITIES,
 	PROP_STATE,
 	PROP_STARTUP,
 	PROP_NETWORKING_ENABLED,
@@ -5439,6 +5442,45 @@ dbus_connection_changed_cb (NMBusManager *dbus_mgr,
 
 /**********************************************************************/
 
+gboolean
+nm_manager_check_capability (NMManager *self,
+                             NMCapability cap)
+{
+	NMManagerPrivate *priv = NM_MANAGER_GET_PRIVATE (self);
+	int i;
+
+	for (i = 0; i < priv->capabilities->len; i++) {
+		NMCapability test = g_array_index (priv->capabilities, gint, i);
+		if (test == cap)
+			return TRUE;
+		if (test > cap)
+			return FALSE;
+	}
+
+	return FALSE;
+}
+
+static int
+cmp_caps (gconstpointer a, gconstpointer b)
+{
+	return *(gint *)a - *(gint *)b;
+}
+
+void
+nm_manager_set_capability (NMManager *self,
+                           NMCapability cap)
+{
+	NMManagerPrivate *priv = NM_MANAGER_GET_PRIVATE (self);
+
+	if (!nm_manager_check_capability (self, cap)) {
+		g_array_append_val (priv->capabilities, cap);
+		g_array_sort (priv->capabilities, cmp_caps);
+		_notify (self, PROP_CAPABILITIES);
+	}
+}
+
+/**********************************************************************/
+
 NM_DEFINE_SINGLETON_REGISTER (NMManager);
 
 NMManager *
@@ -5485,6 +5527,8 @@ constructed (GObject *object)
 
 	G_OBJECT_CLASS (nm_manager_parent_class)->constructed (object);
 
+	priv->capabilities = g_array_new (FALSE, FALSE, sizeof (gint));
+
 	_set_prop_filter (self, nm_bus_manager_get_connection (priv->dbus_mgr));
 
 	priv->settings = nm_settings_new ();
@@ -5643,6 +5687,12 @@ get_property (GObject *object, guint prop_id,
 	case PROP_VERSION:
 		g_value_set_string (value, VERSION);
 		break;
+	case PROP_CAPABILITIES:
+		g_value_set_variant (value, g_variant_new_fixed_array (G_VARIANT_TYPE ("i"),
+		                                                       priv->capabilities->data,
+		                                                       priv->capabilities->len,
+		                                                       sizeof(gint)));
+		break;
 	case PROP_STATE:
 		nm_manager_update_state (self);
 		g_value_set_uint (value, priv->state);
@@ -5859,6 +5909,8 @@ dispose (GObject *object)
 
 	nm_clear_g_source (&priv->timestamp_update_id);
 
+	g_array_free (priv->capabilities, TRUE);
+
 	G_OBJECT_CLASS (nm_manager_parent_class)->dispose (object);
 }
 
@@ -5883,6 +5935,13 @@ nm_manager_class_init (NMManagerClass *manager_class)
 	                         G_PARAM_READABLE |
 	                         G_PARAM_STATIC_STRINGS);
 
+	obj_properties[PROP_CAPABILITIES] =
+		g_param_spec_variant (NM_MANAGER_CAPABILITIES, "", "",
+		                      G_VARIANT_TYPE ("au"),
+		                      NULL,
+		                      G_PARAM_READABLE |
+		                      G_PARAM_STATIC_STRINGS);
+
 	obj_properties[PROP_STATE] =
 	    g_param_spec_uint (NM_MANAGER_STATE, "", "",
 	                       0, NM_STATE_DISCONNECTED, 0,
@@ -6120,4 +6179,3 @@ nm_manager_class_init (NMManagerClass *manager_class)
 	                                        "CheckpointRollback", impl_manager_checkpoint_rollback,
 	                                        NULL);
 }
-
diff --git a/src/nm-manager.h b/src/nm-manager.h
index d7aabff16b..deccbdba53 100644
--- a/src/nm-manager.h
+++ b/src/nm-manager.h
@@ -33,6 +33,7 @@
 #define NM_MANAGER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), NM_TYPE_MANAGER, NMManagerClass))
 
 #define NM_MANAGER_VERSION "version"
+#define NM_MANAGER_CAPABILITIES "capabilities"
 #define NM_MANAGER_STATE "state"
 #define NM_MANAGER_STARTUP "startup"
 #define NM_MANAGER_NETWORKING_ENABLED "networking-enabled"
@@ -111,5 +112,7 @@ gboolean            nm_manager_deactivate_connection   (NMManager *manager,
                                                         NMDeviceStateReason reason,
                                                         GError **error);
 
+gboolean            nm_manager_check_capability (NMManager *self, NMCapability cap);
+void                nm_manager_set_capability   (NMManager *self, NMCapability cap);
 
 #endif /* __NETWORKMANAGER_MANAGER_H__ */