Add DBUS communication in dbus.py, update README and add changes to sources

README.md

@@ -15,3 +15,19 @@ The following section briefly describes how to start the stuff for testing purpo
 
 * `./src/nm-openvpn-service --bus-name org.freedesktop.NetworkManager.wireguard` to start the plugin
 * `examples/dbus/dbus.py` to send Disconnect() to the plugin
+
+## Files
+The following is a list of files that I created over the course of the project and is mainly for myself to keep track of them.
+
+* `nm-wireguard-service.conf`
+* `includes2strings.py`
+
+## Knowledge
+* The wireguard plugin basically handles incoming DBUS requests for the *NM VPN Plugin Interface* (can be looked at via `examples/dbus/dbus.py`)
+* `auth-dialog/nm-openvpn-auth-dialog` reads the secrets from STDIN until the string "DONE" occurs and then proceeds to handle them
+
+NM VPN Plugin:
+https://developer.gnome.org/libnm-glib/stable/libnm-glib-NMVPNPlugin.html
+
+Settings VPN (sent via DBus on Connect(a{sa{sv}}) method):
+https://developer.gnome.org/libnm/stable/NMSettingVpn.html#nm-setting-vpn-get-data-item

auth-dialog/main.c

@@ -457,6 +457,8 @@ main (int argc, char *argv[])
 	AskUserFunc ask_user_func = NULL;
 	FinishFunc finish_func = NULL;
 
+	// this describes how the arguments are supposed to be parsed
+	// e.g. "-u UUID"
 	GOptionContext *context;
 	GOptionEntry entries[] = {
 			{ "reprompt", 'r', 0, G_OPTION_ARG_NONE, &retry, "Reprompt for passwords", NULL},
@@ -485,16 +487,22 @@ main (int argc, char *argv[])
 		return EXIT_FAILURE;
 	}
 
+	// the parameters are supplied via arguments
+	printf("UUID: %s, Name: %s, Service: %s\n", vpn_uuid, vpn_name, vpn_service);
+
 	if (strcmp (vpn_service, NM_VPN_SERVICE_TYPE_OPENVPN) != 0) {
 		fprintf (stderr, "This dialog only works with the '%s' service\n", NM_VPN_SERVICE_TYPE_OPENVPN);
 		return EXIT_FAILURE;
 	}
 
+	printf("Reading stdin details\n");
+	// reads secrets/data from STDIN until "DONE" is read
 	if (!nm_vpn_service_plugin_read_vpn_details (0, &data, &secrets)) {
 		fprintf (stderr, "Failed to read '%s' (%s) data and secrets from stdin.\n",
 		         vpn_name, vpn_uuid);
-		return 1;
+		//return 1; // TODO re-add
 	}
+	printf("Done reading\n");
 
 	if (external_ui_mode) {
 		no_secrets_required_func = eui_no_secrets_required;

examples/dbus/dbus.py

@@ -24,12 +24,14 @@ show_introspect = True
 
 def send_desktop_notification(title="Hello World", msg="pydbus works!"):
     """Send a notification to the desktop environment to display"""
+
     bus = SessionBus()
     notifications = bus.get('.Notifications')
     notifications.Notify('test', 0, 'dialog-information', title, msg, [], {}, 5000)
 
 def list_systemd_units():
     """Fetch all systemd units and print them"""
+
     bus = SystemBus()
 
     # systemd is now a proxy for the .systemd1 remote object
@@ -42,6 +44,7 @@ def list_systemd_units():
 
 def stop_start_systemd_unit(name="ssh.service"):
     """Stop and restart a systemd unit"""
+
     bus = SystemBus()
 
     # systemd is now a proxy for the .systemd1 remote object
@@ -51,6 +54,7 @@ def stop_start_systemd_unit(name="ssh.service"):
 
 def watch_for_new_systemd_jobs():
     """Wait for new systemd units and when they are created, print them out"""
+
     bus = SystemBus()
 
     # systemd is now a proxy for the .systemd1 remote object
@@ -76,8 +80,9 @@ def hibernate():
         else:
             print("Cannot hibernate")
 
-    except GLib.Error as e:
+    except Exception as ex:
         print("Could not get PowerManager from DBUS")
+        print(str(ex))
 
 
 def get_wg_plugin(bus_name="org.freedesktop.NetworkManager.wireguard",
@@ -98,15 +103,39 @@ def get_wg_plugin(bus_name="org.freedesktop.NetworkManager.wireguard",
 
 def wg_disconnect(wg_plugin):
     """Disconnect the WG VPN plugin"""
+
     wg_plugin.Disconnect()
 
+def wg_connect(wg_plugin):
+    """Send the Connect Command to the Wireguard Plugin"""
+
+    # these are the settings that are expected by Connect(a{sa{sv}}) for a VPN plugin
+    service_type = GLib.Variant("s", "service")
+    user_name = GLib.Variant("s", "wireguard")
+    persistent = GLib.Variant("b", False)
+    data = GLib.Variant("a{ss}", {"maxi": "cool"})
+    secrets = GLib.Variant("a{ss}", {"name": "maxi moser"})
+    timeout = GLib.Variant("u", 1337)
+
+    # The DBus type: a{sa{sv}}
+    # is a Dictionary with...
+    # Key: Type ("wireless", "wired", "vpn", ...) -- we want VPN
+    # Value: Dictionary with Key: Setting Name, Value: Setting Value
+    settings = {"vpn":
+                    {"service-type": service_type,
+                        "user-name": user_name,
+                        "persistent": persistent,
+                        "data": data,
+                        "secrets": secrets,
+                        "timeout": timeout}
+                }
+    wg_plugin.Connect(settings)
+
 
 show_introspect = False
 
 if __name__ == "__main__":
     # send_desktop_notification("Guten Tag", "pydbus funktioniert, mein Herr!")
-    # list_systemd_units()
-    # hibernate()
     try:
         wg = get_wg_plugin()
         
@@ -114,7 +143,7 @@ if __name__ == "__main__":
             print(wg.Introspect())
             help(wg)
 
-        wg_disconnect(wg)
+        wg_connect(wg)
 
     except Exception as ex:
         print(str(ex))

src/nm-openvpn-service.c

@@ -236,6 +236,28 @@ _LOGD_enabled (void)
 
 /*****************************************************************************/
 
+static const char *
+wg_quick_find_exepath (void)
+{
+	static const char *paths[] = {
+		"/usr/sbin/wg-quick",
+		"/usr/bin/wg-quick",
+		"/sbin/wg-quick",
+		"/bin/wg-quick",
+		"/usr/local/sbin/wg-quick",
+		"/usr/local/bin/wg-quick",
+	};
+	int i;
+
+	for (i = 0; i < G_N_ELEMENTS(paths); i++) {
+		if (g_file_test (paths[i], G_FILE_TEST_EXISTS)) {
+			return paths[i];
+		}
+	}
+
+	return NULL;
+}
+
 static const char *
 openvpn_binary_find_exepath (void)
 {
@@ -393,6 +415,59 @@ pids_pending_add (GPid pid, NMWireguardPlugin *plugin)
 	gl.pids_pending_list = g_slist_prepend (gl.pids_pending_list, pid_data);
 }
 
+// TODO implement me right
+wg_quick_closed(GPid pid, gint status, gpointer user_data){
+	PidsPendingData *pid_data = user_data;
+	NMWireguardPlugin *plugin;
+
+	if (WIFEXITED (status)) {
+		int exit_status;
+
+		exit_status = WEXITSTATUS (status);
+		if (exit_status != 0)
+			_LOGW ("wg-quick[%ld] exited with error code %d", (long) pid, exit_status);
+		else
+			_LOGI ("wg-quick[%ld] exited with success", (long) pid);
+	}
+	else if (WIFSTOPPED (status))
+		_LOGW ("wg-quick[%ld] stopped unexpectedly with signal %d", (long) pid, WSTOPSIG (status));
+	else if (WIFSIGNALED (status))
+		_LOGW ("wg-quick[%ld] died with signal %d", (long) pid, WTERMSIG (status));
+	else
+		_LOGW ("wg-quick[%ld] died from an unnatural cause", (long) pid);
+
+	g_return_if_fail (pid_data);
+	g_return_if_fail (pid_data->pid == pid);
+	g_return_if_fail (g_slist_find (gl.pids_pending_list, pid_data));
+
+	plugin = pid_data->plugin;
+
+	pid_data->watch_id = 0;
+	gl.pids_pending_list = g_slist_remove (gl.pids_pending_list , pid_data);
+	pids_pending_data_free (pid_data);
+}
+
+// TODO implement me right
+static void
+pids_pending_add_wg (GPid pid, NMWireguardPlugin *plugin)
+{
+	PidsPendingData *pid_data;
+
+	g_return_if_fail (NM_IS_WIREGUARD_PLUGIN (plugin));
+	g_return_if_fail (pid > 0);
+
+	_LOGI ("wg-quick[%ld] started", (long) pid);
+
+	pid_data = g_slice_new (PidsPendingData);
+	pid_data->pid = pid;
+	pid_data->kill_id = 0;
+	pid_data->watch_id = g_child_watch_add (pid, wg_quick_closed, pid_data);
+	pid_data->plugin = plugin;
+	g_object_add_weak_pointer ((GObject *) plugin, (gpointer *) &pid_data->plugin);
+
+	gl.pids_pending_list = g_slist_prepend (gl.pids_pending_list, pid_data);
+}
+
 static gboolean
 pids_pending_ensure_killed (gpointer user_data)
 {
@@ -2038,23 +2113,47 @@ real_disconnect (NMVpnServicePlugin *plugin,
 static gboolean
 test_connect (NMVpnServicePlugin *plugin,
 				NMConnection *connection,
-				GError **error)
+				GError **err)
 {
-	_LOGI("Did a dummy connect");
 
-	/*
+	NMSettingVpn *setting = nm_connection_get_setting_vpn(connection);
-	printf("I Know It!\n");
+	char *secret = nm_setting_vpn_get_secret(setting, "name");
-	// FIXME find something useful
+	char *str_setting = nm_setting_to_string(setting);
-	char **cmd = {"touch", "/home/maxmanski/iknowhwatyoudidlastsummer", NULL};
+	char *wg_quick_path = wg_quick_find_exepath();
-	GPid pid = 0;
+	//char *
-	GSpawnFlags spawn_flags = G_SPAWN_DO_NOT_REAP_CHILD;
-	spawn_flags = G_SPAWN_DEFAULT;
 
-	if (!g_spawn_async (NULL, cmd, NULL, spawn_flags, NULL, NULL, &pid, error)){
+	if(wg_quick_path == NULL){
+		_LOGW("Error: Could not find wg-quick!");
 		return FALSE;
 	}
-	*/
 
+	printf("Setting to String: %s\n", str_setting);
+	printf("Secret: %s\n", secret);
+	
+	//char **cmd = {wg_quick_path, "up", "mullvad", NULL};
+	char **cmd = {"/usr/bin/touch", "/home/maxmanski/uwotm8", NULL};
+	GPid pid = 0;
+	GSpawnFlags spawn_flags = G_SPAWN_DO_NOT_REAP_CHILD;
+	spawn_flags = G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL;
+	spawn_flags = G_SPAWN_DEFAULT | G_SPAWN_DO_NOT_REAP_CHILD;
+
+//	if (!g_spawn_async (NULL, cmd, NULL, spawn_flags, NULL, NULL, &pid, err)){
+	int exit_code = 0;
+	*err = NULL; // TODO remove?
+
+	if (!g_spawn_async(NULL, cmd, NULL, spawn_flags, NULL, NULL, &pid, err)){
+		_LOGW("An error occured while spawning wg-quick! (Error: %s)", (*err)->message);
+		return FALSE;
+	}
+
+	pids_pending_add_wg(pid, plugin);
+	printf("PID of spawned command: %d\n", pid);
+	// note: exit code 139 means SIGSEV (program died because of segfault or so)
+	{ 
+		printf("WG set up and ready to go!\n");
+	}
+
+	_LOGI("Did a dummy connect");
 	return TRUE;
 }