vpn: New vpn daemon that handles vpn connections and clients

1 files changed, 257 insertions, 0 deletions

diff --git a/vpn/main.c b/vpn/main.c
new file mode 100644
index 00000000..35daca77
--- /dev/null
+++ b/vpn/main.c
@@ -0,0 +1,257 @@
+/*
+ *
+ *  ConnMan VPN daemon
+ *
+ *  Copyright (C) 2012  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"
+
+static GMainLoop *main_loop = NULL;
+
+static unsigned int __terminated = 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_debug = NULL;
+static gchar *option_plugin = NULL;
+static gchar *option_noplugin = NULL;
+static gboolean option_detach = TRUE;
+static gboolean option_version = FALSE;
+
+static gboolean 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[] = {
+	{ "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" },
+	{ "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
+				"Show version information and exit" },
+	{ NULL },
+};
+
+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) == FALSE) {
+		if (error != NULL) {
+			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 == TRUE) {
+		printf("%s\n", VERSION);
+		exit(0);
+	}
+
+	if (option_detach == TRUE) {
+		if (daemon(0, 0)) {
+			perror("Can't start daemon");
+			exit(1);
+		}
+	}
+
+	if (mkdir(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");
+	}
+
+	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");
+	}
+
+	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 == NULL) {
+		if (dbus_error_is_set(&err) == TRUE) {
+			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);
+	__vpn_provider_init();
+	__vpn_manager_init();
+	__vpn_ipconfig_init();
+	__vpn_rtnl_init();
+	__connman_task_init();
+	__connman_plugin_init(option_plugin, option_noplugin);
+
+	__vpn_rtnl_start();
+
+	g_free(option_plugin);
+	g_free(option_noplugin);
+
+	g_main_loop_run(main_loop);
+
+	g_source_remove(signal);
+
+	__connman_task_cleanup();
+	__vpn_rtnl_cleanup();
+	__vpn_ipconfig_cleanup();
+	__vpn_manager_cleanup();
+	__vpn_provider_cleanup();
+	__connman_dbus_cleanup();
+	__connman_log_cleanup(FALSE);
+
+	dbus_connection_unref(conn);
+
+	g_main_loop_unref(main_loop);
+
+	g_free(option_debug);
+
+	return 0;
+}