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|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2005 - 2010 Red Hat, Inc.
* Copyright (C) 2005 - 2008 Novell, Inc.
*/
#include <config.h>
#include <glib.h>
#include <string.h>
#include <dbus/dbus.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <unistd.h>
#include "nm-vpn-service.h"
#include "nm-dbus-manager.h"
#include "nm-logging.h"
#include "nm-vpn-manager.h"
#include "nm-glib-compat.h"
G_DEFINE_TYPE (NMVPNService, nm_vpn_service, G_TYPE_OBJECT)
typedef struct {
gboolean disposed;
NMDBusManager *dbus_mgr;
char *name;
char *dbus_service;
char *program;
char *namefile;
GPid pid;
GSList *connections;
guint start_timeout;
guint quit_timeout;
guint child_watch;
gulong name_owner_id;
} NMVPNServicePrivate;
#define NM_VPN_SERVICE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_VPN_SERVICE, NMVPNServicePrivate))
NMVPNService *
nm_vpn_service_new (const char *namefile, GError **error)
{
NMVPNService *self = NULL;
GKeyFile *kf;
char *dbus_service = NULL, *program = NULL, *name = NULL;
g_return_val_if_fail (namefile != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (namefile), NULL);
kf = g_key_file_new ();
if (!g_key_file_load_from_file (kf, namefile, G_KEY_FILE_NONE, error)) {
g_key_file_free (kf);
return NULL;
}
dbus_service = g_key_file_get_string (kf, VPN_CONNECTION_GROUP, "service", NULL);
if (!dbus_service) {
g_set_error (error, 0, 0, "VPN service file %s had no 'service' key", namefile);
goto out;
}
program = g_key_file_get_string (kf, VPN_CONNECTION_GROUP, "program", NULL);
if (!program) {
g_set_error (error, 0, 0, "VPN service file %s had no 'program' key", namefile);
goto out;
}
name = g_key_file_get_string (kf, VPN_CONNECTION_GROUP, "name", NULL);
if (!name) {
g_set_error (error, 0, 0, "VPN service file %s had no 'name' key", namefile);
goto out;
}
self = (NMVPNService *) g_object_new (NM_TYPE_VPN_SERVICE, NULL);
if (!self) {
g_set_error (error, 0, 0, "out of memory creating VPN service object");
goto out;
}
NM_VPN_SERVICE_GET_PRIVATE (self)->name = g_strdup (name);
NM_VPN_SERVICE_GET_PRIVATE (self)->dbus_service = g_strdup (dbus_service);
NM_VPN_SERVICE_GET_PRIVATE (self)->program = g_strdup (program);
NM_VPN_SERVICE_GET_PRIVATE (self)->namefile = g_strdup (namefile);
out:
g_key_file_free (kf);
g_free (dbus_service);
g_free (program);
g_free (name);
return self;
}
const char *
nm_vpn_service_get_dbus_service (NMVPNService *service)
{
g_return_val_if_fail (NM_IS_VPN_SERVICE (service), NULL);
return NM_VPN_SERVICE_GET_PRIVATE (service)->dbus_service;
}
const char *
nm_vpn_service_get_name_file (NMVPNService *service)
{
g_return_val_if_fail (NM_IS_VPN_SERVICE (service), NULL);
return NM_VPN_SERVICE_GET_PRIVATE (service)->namefile;
}
void
nm_vpn_service_connections_stop (NMVPNService *service,
gboolean fail,
NMVPNConnectionStateReason reason)
{
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (service);
GSList *iter, *copy;
/* Copy because stopping the connection may remove it from the list
* in the the NMVPNService objects' VPN connection state handler.
*/
copy = g_slist_copy (priv->connections);
for (iter = copy; iter; iter = iter->next) {
if (fail)
nm_vpn_connection_fail (NM_VPN_CONNECTION (iter->data), reason);
else
nm_vpn_connection_disconnect (NM_VPN_CONNECTION (iter->data), reason);
}
g_slist_free (copy);
}
static void
clear_quit_timeout (NMVPNService *self)
{
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (self);
if (priv->quit_timeout) {
g_source_remove (priv->quit_timeout);
priv->quit_timeout = 0;
}
}
/*
* nm_vpn_service_child_setup
*
* Set the process group ID of the newly forked process
*
*/
static void
nm_vpn_service_child_setup (gpointer user_data G_GNUC_UNUSED)
{
/* We are in the child process at this point */
pid_t pid = getpid ();
setpgid (pid, pid);
}
static void
vpn_service_watch_cb (GPid pid, gint status, gpointer user_data)
{
NMVPNService *service = NM_VPN_SERVICE (user_data);
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (service);
if (WIFEXITED (status)) {
guint err = WEXITSTATUS (status);
if (err != 0) {
nm_log_warn (LOGD_VPN, "VPN service '%s' exited with error: %d",
priv->name, WSTOPSIG (status));
}
} else if (WIFSTOPPED (status)) {
nm_log_warn (LOGD_VPN, "VPN service '%s' stopped unexpectedly with signal %d",
priv->name, WSTOPSIG (status));
} else if (WIFSIGNALED (status)) {
nm_log_warn (LOGD_VPN, "VPN service '%s' died with signal %d",
priv->name, WTERMSIG (status));
} else {
nm_log_warn (LOGD_VPN, "VPN service '%s' died from an unknown cause",
priv->name);
}
priv->pid = 0;
priv->child_watch = 0;
clear_quit_timeout (service);
nm_vpn_service_connections_stop (service, TRUE, NM_VPN_CONNECTION_STATE_REASON_SERVICE_STOPPED);
}
static gboolean
nm_vpn_service_timeout (gpointer data)
{
NMVPNService *self = NM_VPN_SERVICE (data);
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (self);
nm_log_warn (LOGD_VPN, "VPN service '%s' start timed out", priv->name);
priv->start_timeout = 0;
nm_vpn_service_connections_stop (self, TRUE, NM_VPN_CONNECTION_STATE_REASON_SERVICE_START_TIMEOUT);
return FALSE;
}
static gboolean
nm_vpn_service_daemon_exec (NMVPNService *service, GError **error)
{
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (service);
char *vpn_argv[2];
gboolean success = FALSE;
GError *spawn_error = NULL;
g_return_val_if_fail (NM_IS_VPN_SERVICE (service), FALSE);
g_return_val_if_fail (error != NULL, FALSE);
g_return_val_if_fail (*error == NULL, FALSE);
vpn_argv[0] = priv->program;
vpn_argv[1] = NULL;
success = g_spawn_async (NULL, vpn_argv, NULL, G_SPAWN_DO_NOT_REAP_CHILD,
nm_vpn_service_child_setup, NULL, &priv->pid,
&spawn_error);
if (success) {
nm_log_info (LOGD_VPN, "VPN service '%s' started (%s), PID %d",
priv->name, priv->dbus_service, priv->pid);
priv->child_watch = g_child_watch_add (priv->pid, vpn_service_watch_cb, service);
priv->start_timeout = g_timeout_add_seconds (5, nm_vpn_service_timeout, service);
} else {
nm_log_warn (LOGD_VPN, "VPN service '%s': could not launch the VPN service. error: (%d) %s.",
priv->name,
spawn_error ? spawn_error->code : -1,
spawn_error && spawn_error->message ? spawn_error->message : "(unknown)");
g_set_error (error,
NM_VPN_MANAGER_ERROR, NM_VPN_MANAGER_ERROR_SERVICE_START_FAILED,
"%s", spawn_error ? spawn_error->message : "unknown g_spawn_async() error");
nm_vpn_service_connections_stop (service, TRUE, NM_VPN_CONNECTION_STATE_REASON_SERVICE_START_FAILED);
if (spawn_error)
g_error_free (spawn_error);
}
return success;
}
static gboolean
ensure_killed (gpointer data)
{
int pid = GPOINTER_TO_INT (data);
if (kill (pid, 0) == 0)
kill (pid, SIGKILL);
/* ensure the child is reaped */
nm_log_dbg (LOGD_VPN, "waiting for VPN service pid %d to exit", pid);
waitpid (pid, NULL, 0);
nm_log_dbg (LOGD_VPN, "VPN service pid %d cleaned up", pid);
return FALSE;
}
static gboolean
service_quit (gpointer user_data)
{
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (user_data);
if (priv->pid) {
if (kill (priv->pid, SIGTERM) == 0)
g_timeout_add_seconds (2, ensure_killed, GINT_TO_POINTER (priv->pid));
else {
kill (priv->pid, SIGKILL);
/* ensure the child is reaped */
nm_log_dbg (LOGD_VPN, "waiting for VPN service pid %d to exit", priv->pid);
waitpid (priv->pid, NULL, 0);
nm_log_dbg (LOGD_VPN, "VPN service pid %d cleaned up", priv->pid);
}
priv->pid = 0;
}
priv->quit_timeout = 0;
return FALSE;
}
static void
connection_vpn_state_changed (NMVPNConnection *connection,
NMVPNConnectionState state,
NMVPNConnectionStateReason reason,
gpointer user_data)
{
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (user_data);
switch (state) {
case NM_VPN_CONNECTION_STATE_FAILED:
case NM_VPN_CONNECTION_STATE_DISCONNECTED:
/* Remove the connection from our list */
priv->connections = g_slist_remove (priv->connections, connection);
g_object_unref (connection);
if (priv->connections == NULL) {
/* Tell the service to quit in a few seconds */
if (!priv->quit_timeout)
priv->quit_timeout = g_timeout_add_seconds (5, service_quit, user_data);
}
break;
default:
break;
}
}
NMVPNConnection *
nm_vpn_service_activate (NMVPNService *service,
NMConnection *connection,
NMDevice *device,
GError **error)
{
NMVPNConnection *vpn;
NMVPNServicePrivate *priv;
g_return_val_if_fail (NM_IS_VPN_SERVICE (service), NULL);
g_return_val_if_fail (NM_IS_CONNECTION (connection), NULL);
g_return_val_if_fail (NM_IS_DEVICE (device), NULL);
g_return_val_if_fail (error != NULL, NULL);
g_return_val_if_fail (*error == NULL, NULL);
priv = NM_VPN_SERVICE_GET_PRIVATE (service);
clear_quit_timeout (service);
vpn = nm_vpn_connection_new (connection, device);
g_signal_connect (vpn, "vpn-state-changed",
G_CALLBACK (connection_vpn_state_changed),
service);
priv->connections = g_slist_prepend (priv->connections, vpn);
if (nm_dbus_manager_name_has_owner (priv->dbus_mgr, priv->dbus_service)) {
// FIXME: fill in error when errors happen
nm_vpn_connection_activate (vpn);
} else if (priv->start_timeout == 0) {
nm_log_info (LOGD_VPN, "Starting VPN service '%s'...", priv->name);
if (!nm_vpn_service_daemon_exec (service, error))
vpn = NULL;
}
return vpn;
}
GSList *
nm_vpn_service_get_active_connections (NMVPNService *service)
{
g_return_val_if_fail (NM_IS_VPN_SERVICE (service), NULL);
return g_slist_copy (NM_VPN_SERVICE_GET_PRIVATE (service)->connections);
}
static void
nm_vpn_service_name_owner_changed (NMDBusManager *mgr,
const char *name,
const char *old,
const char *new,
gpointer user_data)
{
NMVPNService *service = NM_VPN_SERVICE (user_data);
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (service);
gboolean old_owner_good;
gboolean new_owner_good;
GSList *iter;
if (strcmp (name, priv->dbus_service))
return;
/* Service changed, no need to wait for the timeout any longer */
if (priv->start_timeout) {
g_source_remove (priv->start_timeout);
priv->start_timeout = 0;
}
old_owner_good = (old && (strlen (old) > 0));
new_owner_good = (new && (strlen (new) > 0));
if (!old_owner_good && new_owner_good) {
/* service just appeared */
nm_log_info (LOGD_VPN, "VPN service '%s' appeared; activating connections", priv->name);
clear_quit_timeout (service);
for (iter = priv->connections; iter; iter = iter->next)
nm_vpn_connection_activate (NM_VPN_CONNECTION (iter->data));
} else if (old_owner_good && !new_owner_good) {
/* service went away */
nm_log_info (LOGD_VPN, "VPN service '%s' disappeared", priv->name);
nm_vpn_service_connections_stop (service, TRUE, NM_VPN_CONNECTION_STATE_REASON_SERVICE_STOPPED);
}
}
/******************************************************************************/
static void
nm_vpn_service_init (NMVPNService *self)
{
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (self);
priv->dbus_mgr = nm_dbus_manager_get ();
priv->name_owner_id = g_signal_connect (priv->dbus_mgr, "name-owner-changed",
G_CALLBACK (nm_vpn_service_name_owner_changed),
self);
}
static void
dispose (GObject *object)
{
NMVPNService *self = NM_VPN_SERVICE (object);
NMVPNServicePrivate *priv = NM_VPN_SERVICE_GET_PRIVATE (self);
if (priv->disposed)
goto out;
priv->disposed = TRUE;
if (priv->start_timeout)
g_source_remove (priv->start_timeout);
nm_vpn_service_connections_stop (NM_VPN_SERVICE (object),
FALSE,
NM_VPN_CONNECTION_STATE_REASON_SERVICE_STOPPED);
g_signal_handler_disconnect (priv->dbus_mgr, priv->name_owner_id);
if (priv->child_watch)
g_source_remove (priv->child_watch);
clear_quit_timeout (self);
service_quit (self);
g_object_unref (priv->dbus_mgr);
g_free (priv->name);
g_free (priv->dbus_service);
g_free (priv->program);
g_free (priv->namefile);
out:
G_OBJECT_CLASS (nm_vpn_service_parent_class)->dispose (object);
}
static void
nm_vpn_service_class_init (NMVPNServiceClass *service_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (service_class);
g_type_class_add_private (service_class, sizeof (NMVPNServicePrivate));
/* virtual methods */
object_class->dispose = dispose;
}
|