summaryrefslogtreecommitdiff
path: root/vpn/main.c
blob: dcf3a78c2dbec3e8ca2c3b421918acfe95a36cf9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
/*
 *
 *  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 option_routes = 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" },
	{ "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 },
};

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(option_routes);
	__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;
}