/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2005 - 2012 Red Hat, Inc.
* Copyright (C) 2006 - 2008 Novell, Inc.
*/
#include "nm-default.h"
#include "nm-vpn-manager.h"
#include "nm-vpn-plugin-info.h"
#include "nm-vpn-connection.h"
#include "nm-setting-vpn.h"
#include "nm-vpn-dbus-interface.h"
#include "nm-core-internal.h"
typedef struct {
GSList * plugins;
GFileMonitor *monitor_etc;
GFileMonitor *monitor_lib;
gulong monitor_id_etc;
gulong monitor_id_lib;
/* This is only used for services that don't support multiple
* connections, to guard access to them. */
GHashTable *active_services;
} NMVpnManagerPrivate;
struct _NMVpnManager {
GObject parent;
NMVpnManagerPrivate _priv;
};
struct _NMVpnManagerClass {
GObjectClass parent;
};
G_DEFINE_TYPE(NMVpnManager, nm_vpn_manager, G_TYPE_OBJECT)
#define NM_VPN_MANAGER_GET_PRIVATE(self) _NM_GET_PRIVATE(self, NMVpnManager, NM_IS_VPN_MANAGER)
/*****************************************************************************/
static void
vpn_state_changed(NMVpnConnection *vpn, GParamSpec *pspec, NMVpnManager *manager)
{
NMVpnManagerPrivate * priv = NM_VPN_MANAGER_GET_PRIVATE(manager);
NMActiveConnectionState state = nm_active_connection_get_state(NM_ACTIVE_CONNECTION(vpn));
const char * service_name = nm_vpn_connection_get_service(vpn);
if (state == NM_ACTIVE_CONNECTION_STATE_DEACTIVATED) {
g_hash_table_remove(priv->active_services, service_name);
g_signal_handlers_disconnect_by_func(vpn, vpn_state_changed, manager);
g_object_unref(manager);
}
}
gboolean
nm_vpn_manager_activate_connection(NMVpnManager *manager, NMVpnConnection *vpn, GError **error)
{
NMVpnManagerPrivate *priv;
NMVpnPluginInfo * plugin_info;
const char * service_name;
NMDevice * device;
g_return_val_if_fail(NM_IS_VPN_MANAGER(manager), FALSE);
g_return_val_if_fail(NM_IS_VPN_CONNECTION(vpn), FALSE);
g_return_val_if_fail(!error || !*error, FALSE);
priv = NM_VPN_MANAGER_GET_PRIVATE(manager);
device = nm_active_connection_get_device(NM_ACTIVE_CONNECTION(vpn));
g_assert(device);
if (nm_device_get_state(device) != NM_DEVICE_STATE_ACTIVATED
&& nm_device_get_state(device) != NM_DEVICE_STATE_SECONDARIES) {
g_set_error_literal(error,
NM_MANAGER_ERROR,
NM_MANAGER_ERROR_DEPENDENCY_FAILED,
"The base device for the VPN connection was not active.");
return FALSE;
}
service_name = nm_vpn_connection_get_service(vpn);
plugin_info = nm_vpn_plugin_info_list_find_by_service(priv->plugins, service_name);
if (!plugin_info) {
g_set_error(error,
NM_MANAGER_ERROR,
NM_MANAGER_ERROR_CONNECTION_NOT_AVAILABLE,
"The VPN service '%s' was not installed.",
service_name);
return FALSE;
}
if (!nm_vpn_plugin_info_supports_multiple(plugin_info)
&& g_hash_table_contains(priv->active_services, service_name)) {
g_set_error(error,
NM_MANAGER_ERROR,
NM_MANAGER_ERROR_CONNECTION_NOT_AVAILABLE,
"The '%s' plugin only supports a single active connection.",
nm_vpn_plugin_info_get_name(plugin_info));
return FALSE;
}
nm_vpn_connection_activate(vpn, plugin_info);
if (!nm_vpn_plugin_info_supports_multiple(plugin_info)) {
/* Block activations of the connections of the same service type. */
g_hash_table_add(priv->active_services, g_strdup(service_name));
g_signal_connect(vpn,
"notify::" NM_ACTIVE_CONNECTION_STATE,
G_CALLBACK(vpn_state_changed),
g_object_ref(manager));
}
return TRUE;
}
/*****************************************************************************/
static void
try_add_plugin(NMVpnManager *self, NMVpnPluginInfo *plugin_info)
{
NMVpnManagerPrivate *priv = NM_VPN_MANAGER_GET_PRIVATE(self);
const char * program;
program = nm_vpn_plugin_info_get_program(plugin_info);
if (!program || !*program)
return;
/* Make sure we don't add dupes.
* We don't really allow reload of the same file. What we do allow is however to
* delete a file and re-add it. */
if (nm_vpn_plugin_info_list_find_by_filename(priv->plugins,
nm_vpn_plugin_info_get_filename(plugin_info)))
return;
if (!nm_vpn_plugin_info_list_add(&priv->plugins, plugin_info, NULL))
return;
}
static void
vpn_dir_changed(GFileMonitor * monitor,
GFile * file,
GFile * other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
NMVpnManager * self = NM_VPN_MANAGER(user_data);
NMVpnManagerPrivate *priv = NM_VPN_MANAGER_GET_PRIVATE(self);
NMVpnPluginInfo * plugin_info;
gs_free char * path = NULL;
GError * error = NULL;
path = g_file_get_path(file);
if (!nm_vpn_plugin_info_validate_filename(path))
return;
switch (event_type) {
case G_FILE_MONITOR_EVENT_DELETED:
plugin_info = nm_vpn_plugin_info_list_find_by_filename(priv->plugins, path);
if (!plugin_info)
break;
nm_log_dbg(LOGD_VPN, "vpn: service file %s deleted", path);
nm_vpn_plugin_info_list_remove(&priv->plugins, plugin_info);
break;
case G_FILE_MONITOR_EVENT_CREATED:
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
plugin_info = nm_vpn_plugin_info_list_find_by_filename(priv->plugins, path);
if (plugin_info) {
/* we don't support reloading an existing plugin. You can only remove the file
* and re-add it. By reloading we want to support the use case of installing
* a VPN plugin after NM started. No need to burden ourself with a complete
* reload. */
break;
}
if (!_nm_vpn_plugin_info_check_file(path, TRUE, TRUE, 0, NULL, NULL, &error)) {
nm_log_dbg(LOGD_VPN, "vpn: ignore changed service file %s (%s)", path, error->message);
g_clear_error(&error);
break;
}
plugin_info = nm_vpn_plugin_info_new_from_file(path, &error);
if (!plugin_info) {
nm_log_dbg(LOGD_VPN,
"vpn: ignore changed service file %s due to invalid content (%s)",
path,
error->message);
g_clear_error(&error);
break;
}
nm_log_dbg(LOGD_VPN, "vpn: service file %s created or modified", path);
try_add_plugin(self, plugin_info);
g_object_unref(plugin_info);
break;
default:
nm_log_dbg(LOGD_VPN, "vpn: service file %s change event %d", path, event_type);
break;
}
}
/*****************************************************************************/
NM_DEFINE_SINGLETON_GETTER(NMVpnManager, nm_vpn_manager_get, NM_TYPE_VPN_MANAGER);
static void
nm_vpn_manager_init(NMVpnManager *self)
{
NMVpnManagerPrivate *priv = NM_VPN_MANAGER_GET_PRIVATE(self);
GFile * file;
GSList * infos, *info;
const char * conf_dir_etc = _nm_vpn_plugin_info_get_default_dir_etc();
const char * conf_dir_lib = _nm_vpn_plugin_info_get_default_dir_lib();
/* Watch the VPN directory for changes */
file = g_file_new_for_path(conf_dir_lib);
priv->monitor_lib = g_file_monitor_directory(file, G_FILE_MONITOR_NONE, NULL, NULL);
g_object_unref(file);
if (priv->monitor_lib) {
priv->monitor_id_lib =
g_signal_connect(priv->monitor_lib, "changed", G_CALLBACK(vpn_dir_changed), self);
}
file = g_file_new_for_path(conf_dir_etc);
priv->monitor_etc = g_file_monitor_directory(file, G_FILE_MONITOR_NONE, NULL, NULL);
g_object_unref(file);
if (priv->monitor_etc) {
priv->monitor_id_etc =
g_signal_connect(priv->monitor_etc, "changed", G_CALLBACK(vpn_dir_changed), self);
}
/* first read conf_dir_lib. The name files are not really user configuration, but
* plugin configuration. Hence we expect ~newer~ plugins to install their files
* in /usr/lib/NetworkManager. We want to prefer those files.
* In case of no-conflict, the order doesn't matter. */
infos = _nm_vpn_plugin_info_list_load_dir(conf_dir_lib, TRUE, 0, NULL, NULL);
for (info = infos; info; info = info->next)
try_add_plugin(self, info->data);
g_slist_free_full(infos, g_object_unref);
infos = _nm_vpn_plugin_info_list_load_dir(conf_dir_etc, TRUE, 0, NULL, NULL);
for (info = infos; info; info = info->next)
try_add_plugin(self, info->data);
g_slist_free_full(infos, g_object_unref);
priv->active_services = g_hash_table_new_full(nm_str_hash, g_str_equal, g_free, NULL);
}
static void
dispose(GObject *object)
{
NMVpnManagerPrivate *priv = NM_VPN_MANAGER_GET_PRIVATE(object);
if (priv->monitor_etc) {
if (priv->monitor_id_etc)
g_signal_handler_disconnect(priv->monitor_etc, priv->monitor_id_etc);
g_file_monitor_cancel(priv->monitor_etc);
g_clear_object(&priv->monitor_etc);
}
if (priv->monitor_lib) {
if (priv->monitor_id_lib)
g_signal_handler_disconnect(priv->monitor_lib, priv->monitor_id_lib);
g_file_monitor_cancel(priv->monitor_lib);
g_clear_object(&priv->monitor_lib);
}
while (priv->plugins)
nm_vpn_plugin_info_list_remove(&priv->plugins, priv->plugins->data);
g_hash_table_unref(priv->active_services);
G_OBJECT_CLASS(nm_vpn_manager_parent_class)->dispose(object);
}
static void
nm_vpn_manager_class_init(NMVpnManagerClass *manager_class)
{
GObjectClass *object_class = G_OBJECT_CLASS(manager_class);
object_class->dispose = dispose;
}