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/*
*
* ConnMan VPN daemon
*
* Copyright (C) 2012-2013 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <sys/signalfd.h>
#include <getopt.h>
#include <sys/stat.h>
#include <net/if.h>
#include <netdb.h>
#include <gdbus.h>
#include "../src/connman.h"
#include "vpn.h"
#include "connman/vpn-dbus.h"
#define CONFIGMAINFILE CONFIGDIR "/connman-vpn.conf"
#define DEFAULT_INPUT_REQUEST_TIMEOUT 300 * 1000
static GMainLoop *main_loop = NULL;
static unsigned int __terminated = 0;
static struct {
unsigned int timeout_inputreq;
} connman_vpn_settings = {
.timeout_inputreq = DEFAULT_INPUT_REQUEST_TIMEOUT,
};
static GKeyFile *load_config(const char *file)
{
GError *err = NULL;
GKeyFile *keyfile;
keyfile = g_key_file_new();
g_key_file_set_list_separator(keyfile, ',');
if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
if (err->code != G_FILE_ERROR_NOENT) {
connman_error("Parsing %s failed: %s", file,
err->message);
}
g_error_free(err);
g_key_file_free(keyfile);
return NULL;
}
return keyfile;
}
static void parse_config(GKeyFile *config, const char *file)
{
GError *error = NULL;
int timeout;
if (!config)
return;
DBG("parsing %s", file);
timeout = g_key_file_get_integer(config, "General",
"InputRequestTimeout", &error);
if (!error && timeout >= 0)
connman_vpn_settings.timeout_inputreq = timeout * 1000;
g_clear_error(&error);
}
static int config_init(const char *file)
{
GKeyFile *config;
config = load_config(file);
parse_config(config, file);
if (config)
g_key_file_free(config);
return 0;
}
static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
gpointer user_data)
{
struct signalfd_siginfo si;
ssize_t result;
int fd;
if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP))
return FALSE;
fd = g_io_channel_unix_get_fd(channel);
result = read(fd, &si, sizeof(si));
if (result != sizeof(si))
return FALSE;
switch (si.ssi_signo) {
case SIGINT:
case SIGTERM:
if (__terminated == 0) {
connman_info("Terminating");
g_main_loop_quit(main_loop);
}
__terminated = 1;
break;
}
return TRUE;
}
static guint setup_signalfd(void)
{
GIOChannel *channel;
guint source;
sigset_t mask;
int fd;
sigemptyset(&mask);
sigaddset(&mask, SIGINT);
sigaddset(&mask, SIGTERM);
if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
perror("Failed to set signal mask");
return 0;
}
fd = signalfd(-1, &mask, 0);
if (fd < 0) {
perror("Failed to create signal descriptor");
return 0;
}
channel = g_io_channel_unix_new(fd);
g_io_channel_set_close_on_unref(channel, TRUE);
g_io_channel_set_encoding(channel, NULL, NULL);
g_io_channel_set_buffered(channel, FALSE);
source = g_io_add_watch(channel,
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
signal_handler, NULL);
g_io_channel_unref(channel);
return source;
}
static void disconnect_callback(DBusConnection *conn, void *user_data)
{
connman_error("D-Bus disconnect");
g_main_loop_quit(main_loop);
}
static gchar *option_config = NULL;
static gchar *option_debug = NULL;
static gchar *option_plugin = NULL;
static gchar *option_noplugin = NULL;
static bool option_detach = true;
static bool option_version = false;
static bool option_routes = false;
static bool parse_debug(const char *key, const char *value,
gpointer user_data, GError **error)
{
if (value)
option_debug = g_strdup(value);
else
option_debug = g_strdup("*");
return true;
}
static GOptionEntry options[] = {
{ "config", 'c', 0, G_OPTION_ARG_STRING, &option_config,
"Load the specified configuration file "
"instead of " CONFIGMAINFILE, "FILE" },
{ "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
G_OPTION_ARG_CALLBACK, parse_debug,
"Specify debug options to enable", "DEBUG" },
{ "plugin", 'p', 0, G_OPTION_ARG_STRING, &option_plugin,
"Specify plugins to load", "NAME,..." },
{ "noplugin", 'P', 0, G_OPTION_ARG_STRING, &option_noplugin,
"Specify plugins not to load", "NAME,..." },
{ "nodaemon", 'n', G_OPTION_FLAG_REVERSE,
G_OPTION_ARG_NONE, &option_detach,
"Don't fork daemon to background" },
{ "routes", 'r', 0, G_OPTION_ARG_NONE, &option_routes,
"Create/delete VPN routes" },
{ "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
"Show version information and exit" },
{ NULL },
};
/*
* This function will be called from generic src/agent.c code so we have
* to use connman_ prefix instead of vpn_ one.
*/
unsigned int connman_timeout_input_request(void)
{
return connman_vpn_settings.timeout_inputreq;
}
int main(int argc, char *argv[])
{
GOptionContext *context;
GError *error = NULL;
DBusConnection *conn;
DBusError err;
guint signal;
context = g_option_context_new(NULL);
g_option_context_add_main_entries(context, options, NULL);
if (!g_option_context_parse(context, &argc, &argv, &error)) {
if (error) {
g_printerr("%s\n", error->message);
g_error_free(error);
} else
g_printerr("An unknown error occurred\n");
exit(1);
}
g_option_context_free(context);
if (option_version) {
printf("%s\n", VERSION);
exit(0);
}
if (option_detach) {
if (daemon(0, 0)) {
perror("Can't start daemon");
exit(1);
}
}
if (mkdir(VPN_STATEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
if (errno != EEXIST)
perror("Failed to create state directory");
}
/*
* At some point the VPN stuff is migrated into VPN_STORAGEDIR
* and this mkdir() call can be removed.
*/
if (mkdir(STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
if (errno != EEXIST)
perror("Failed to create storage directory");
}
if (mkdir(VPN_STORAGEDIR, S_IRUSR | S_IWUSR | S_IXUSR |
S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) < 0) {
if (errno != EEXIST)
perror("Failed to create VPN storage directory");
}
umask(0077);
main_loop = g_main_loop_new(NULL, FALSE);
signal = setup_signalfd();
dbus_error_init(&err);
conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, VPN_SERVICE, &err);
if (!conn) {
if (dbus_error_is_set(&err)) {
fprintf(stderr, "%s\n", err.message);
dbus_error_free(&err);
} else
fprintf(stderr, "Can't register with system bus\n");
exit(1);
}
g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL);
__connman_log_init(argv[0], option_debug, option_detach, false,
"Connection Manager VPN daemon", VERSION);
__connman_dbus_init(conn);
if (!option_config)
config_init(CONFIGMAINFILE);
else
config_init(option_config);
__connman_inotify_init();
__connman_agent_init();
__vpn_provider_init(option_routes);
__vpn_manager_init();
__vpn_ipconfig_init();
__vpn_rtnl_init();
__connman_task_init();
__connman_plugin_init(option_plugin, option_noplugin);
__vpn_config_init();
__vpn_rtnl_start();
g_free(option_plugin);
g_free(option_noplugin);
g_main_loop_run(main_loop);
g_source_remove(signal);
__vpn_config_cleanup();
__connman_plugin_cleanup();
__connman_task_cleanup();
__vpn_rtnl_cleanup();
__vpn_ipconfig_cleanup();
__vpn_manager_cleanup();
__vpn_provider_cleanup();
__connman_agent_cleanup();
__connman_inotify_cleanup();
__connman_dbus_cleanup();
__connman_log_cleanup(false);
dbus_connection_unref(conn);
g_main_loop_unref(main_loop);
g_free(option_debug);
return 0;
}