libnm-core: add dns-priority to NMSettingIPConfig

libnm-core/nm-setting-ip-config.c

@@ -1120,6 +1120,7 @@ typedef struct {
 	GPtrArray *dns;        /* array of IP address strings */
 	GPtrArray *dns_search; /* array of domain name strings */
 	GPtrArray *dns_options;/* array of DNS options */
+	gint dns_priority;
 	GPtrArray *addresses;  /* array of NMIPAddress */
 	GPtrArray *routes;     /* array of NMIPRoute */
 	gint64 route_metric;
@@ -1140,6 +1141,7 @@ enum {
 	PROP_DNS,
 	PROP_DNS_SEARCH,
 	PROP_DNS_OPTIONS,
+	PROP_DNS_PRIORITY,
 	PROP_ADDRESSES,
 	PROP_GATEWAY,
 	PROP_ROUTES,
@@ -1683,6 +1685,22 @@ nm_setting_ip_config_clear_dns_options (NMSettingIPConfig *setting, gboolean is_
 	g_object_notify (G_OBJECT (setting), NM_SETTING_IP_CONFIG_DNS_OPTIONS);
 }
 
+/**
+ * nm_setting_ip_config_get_dns_priority:
+ * @setting: the #NMSettingIPConfig
+ *
+ * Returns: the priority of DNS servers
+ *
+ * Since: 1.4
+ **/
+gint
+nm_setting_ip_config_get_dns_priority (NMSettingIPConfig *setting)
+{
+	g_return_val_if_fail (NM_IS_SETTING_IP_CONFIG (setting), 0);
+
+	return NM_SETTING_IP_CONFIG_GET_PRIVATE (setting)->dns_priority;
+}
+
 /**
  * nm_setting_ip_config_get_num_addresses:
  * @setting: the #NMSettingIPConfig
@@ -2362,6 +2380,9 @@ set_property (GObject *object, guint prop_id,
 			}
 		}
 		break;
+	case PROP_DNS_PRIORITY:
+		priv->dns_priority = g_value_get_int (value);
+		break;
 	case PROP_ADDRESSES:
 		g_ptr_array_unref (priv->addresses);
 		priv->addresses = _nm_utils_copy_array (g_value_get_boxed (value),
@@ -2434,6 +2455,9 @@ get_property (GObject *object, guint prop_id,
 	case PROP_DNS_OPTIONS:
 		g_value_take_boxed (value, priv->dns_options ? _nm_utils_ptrarray_to_strv (priv->dns_options) : NULL);
 		break;
+	case PROP_DNS_PRIORITY:
+		g_value_set_int (value, priv->dns_priority);
+		break;
 	case PROP_ADDRESSES:
 		g_value_take_boxed (value, _nm_utils_copy_array (priv->addresses,
 		                                                 (NMUtilsCopyFunc) nm_ip_address_dup,
@@ -2585,6 +2609,34 @@ nm_setting_ip_config_class_init (NMSettingIPConfigClass *setting_class)
 		                     G_PARAM_READWRITE |
 		                     G_PARAM_STATIC_STRINGS));
 
+	/**
+	 * NMSettingIPConfig:dns-priority:
+	 *
+	 * DNS priority.
+	 *
+	 * The relative priority to be used when determining the order of DNS
+	 * servers in resolv.conf.  A lower value means that servers will be on top
+	 * of the file.  Zero selects the default value, which is 50 for VPNs and
+	 * 100 for other connections.  When multiple devices have configurations
+	 * with the same priority, the one with an active default route will be
+	 * preferred.  Note that when using dns=dnsmasq the order is meaningless
+	 * since dnsmasq forwards queries to all known servers at the same time.
+	 *
+	 * Negative values have the special effect of excluding other configurations
+	 * with a greater priority value; so in presence of at least a negative
+	 * priority, only DNS servers from configurations with the lowest priority
+	 * value will be used.
+	 *
+	 * Since: 1.4
+	 **/
+	g_object_class_install_property
+	    (object_class, PROP_DNS_PRIORITY,
+	     g_param_spec_int (NM_SETTING_IP_CONFIG_DNS_PRIORITY, "", "",
+	                       G_MININT32, G_MAXINT32, 0,
+	                       G_PARAM_READWRITE |
+	                       G_PARAM_CONSTRUCT |
+	                       G_PARAM_STATIC_STRINGS));
+
 	/**
 	 * NMSettingIPConfig:addresses:
 	 *

libnm-core/nm-setting-ip-config.h

@@ -136,6 +136,7 @@ void         nm_ip_route_set_attribute       (NMIPRoute   *route,
 #define NM_SETTING_IP_CONFIG_DNS                "dns"
 #define NM_SETTING_IP_CONFIG_DNS_SEARCH         "dns-search"
 #define NM_SETTING_IP_CONFIG_DNS_OPTIONS        "dns-options"
+#define NM_SETTING_IP_CONFIG_DNS_PRIORITY       "dns-priority"
 #define NM_SETTING_IP_CONFIG_ADDRESSES          "addresses"
 #define NM_SETTING_IP_CONFIG_GATEWAY            "gateway"
 #define NM_SETTING_IP_CONFIG_ROUTES             "routes"
@@ -219,6 +220,9 @@ gboolean      nm_setting_ip_config_remove_dns_option_by_value (NMSettingIPConfig
                                                                const char        *dns_option);
 void          nm_setting_ip_config_clear_dns_options          (NMSettingIPConfig *setting, gboolean is_set);
 
+NM_AVAILABLE_IN_1_4
+gint          nm_setting_ip_config_get_dns_priority (NMSettingIPConfig *setting);
+
 guint         nm_setting_ip_config_get_num_addresses          (NMSettingIPConfig *setting);
 NMIPAddress  *nm_setting_ip_config_get_address                (NMSettingIPConfig *setting,
                                                                int                idx);

libnm-core/tests/test-general.c

@@ -1968,6 +1968,7 @@ test_connection_diff_a_only (void)
 			{ NM_SETTING_IP_CONFIG_NEVER_DEFAULT,      NM_SETTING_DIFF_RESULT_IN_A },
 			{ NM_SETTING_IP_CONFIG_MAY_FAIL,           NM_SETTING_DIFF_RESULT_IN_A },
 			{ NM_SETTING_IP_CONFIG_DAD_TIMEOUT,        NM_SETTING_DIFF_RESULT_IN_A },
+			{ NM_SETTING_IP_CONFIG_DNS_PRIORITY,       NM_SETTING_DIFF_RESULT_IN_A },
 			{ NULL, NM_SETTING_DIFF_RESULT_UNKNOWN },
 		} },
 	};

libnm/libnm.ver

@@ -1061,6 +1061,7 @@ global:
 
 libnm_1_4_0 {
 global:
+	nm_setting_ip_config_get_dns_priority;
 	nm_vpn_editor_plugin_load;
 	nm_vpn_plugin_info_get_auth_dialog;
 	nm_vpn_plugin_info_get_service;