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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2014 Instituto Nokia de Tecnologia - INdT
*
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <sys/signalfd.h>
#include <glib.h>
#include <dbus/dbus.h>
#include <gdbus/gdbus.h>
#include "src/error.h"
#define GATT_MGR_IFACE "org.bluez.GattManager1"
#define GATT_SERVICE_IFACE "org.bluez.GattService1"
#define GATT_CHR_IFACE "org.bluez.GattCharacteristic1"
/* Immediate Alert Service UUID */
#define IAS_UUID "00001802-0000-1000-8000-00805f9b34fb"
#define ALERT_LEVEL_CHR_UUID "00002a06-0000-1000-8000-00805f9b34fb"
static GMainLoop *main_loop;
static GSList *services;
static DBusConnection *connection;
struct characteristic {
char *uuid;
char *path;
uint8_t *value;
int vlen;
};
static gboolean chr_get_uuid(const GDBusPropertyTable *property,
DBusMessageIter *iter, void *user_data)
{
struct characteristic *chr = user_data;
dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING, &chr->uuid);
return TRUE;
}
static gboolean chr_get_value(const GDBusPropertyTable *property,
DBusMessageIter *iter, void *user_data)
{
struct characteristic *chr = user_data;
DBusMessageIter array;
printf("Get(\"Value\")\n");
dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
DBUS_TYPE_BYTE_AS_STRING, &array);
dbus_message_iter_append_fixed_array(&array, DBUS_TYPE_BYTE,
&chr->value, chr->vlen);
dbus_message_iter_close_container(iter, &array);
return TRUE;
}
static void chr_set_value(const GDBusPropertyTable *property,
DBusMessageIter *iter,
GDBusPendingPropertySet id, void *user_data)
{
struct characteristic *chr = user_data;
DBusMessageIter array;
uint8_t *value;
int len;
printf("Set('Value', ...)\n");
if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY) {
printf("Invalid value for Set('Value'...)\n");
g_dbus_pending_property_error(id,
ERROR_INTERFACE ".InvalidArguments",
"Invalid arguments in method call");
return;
}
dbus_message_iter_recurse(iter, &array);
dbus_message_iter_get_fixed_array(&array, &value, &len);
g_free(chr->value);
chr->value = g_memdup(value, len);
chr->vlen = len;
g_dbus_pending_property_success(id);
g_dbus_emit_property_changed(connection, chr->path,
GATT_CHR_IFACE, "Value");
}
static const GDBusPropertyTable chr_properties[] = {
{ "UUID", "s", chr_get_uuid },
{ "Value", "ay", chr_get_value, chr_set_value, NULL },
{ }
};
static gboolean service_get_uuid(const GDBusPropertyTable *property,
DBusMessageIter *iter, void *user_data)
{
const char *uuid = user_data;
printf("Get UUID: %s\n", uuid);
dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING, &uuid);
return TRUE;
}
static gboolean service_get_includes(const GDBusPropertyTable *property,
DBusMessageIter *iter, void *user_data)
{
const char *uuid = user_data;
printf("Get Includes: %s\n", uuid);
return TRUE;
}
static gboolean service_exist_includes(const GDBusPropertyTable *property,
void *user_data)
{
const char *uuid = user_data;
printf("Exist Includes: %s\n", uuid);
return FALSE;
}
static const GDBusPropertyTable service_properties[] = {
{ "UUID", "s", service_get_uuid },
{ "Includes", "ao", service_get_includes, NULL,
service_exist_includes },
{ }
};
static void chr_iface_destroy(gpointer user_data)
{
struct characteristic *chr = user_data;
g_free(chr->uuid);
g_free(chr->value);
g_free(chr->path);
g_free(chr);
}
static gboolean register_characteristic(DBusConnection *conn, const char *uuid,
const uint8_t *value, int vlen,
const char *service_path)
{
struct characteristic *chr;
static int id = 1;
char *path;
gboolean ret = TRUE;
path = g_strdup_printf("%s/characteristic%d", service_path, id++);
chr = g_new0(struct characteristic, 1);
chr->uuid = g_strdup(uuid);
chr->value = g_memdup(value, vlen);
chr->vlen = vlen;
chr->path = path;
if (!g_dbus_register_interface(conn, path, GATT_CHR_IFACE,
NULL, NULL, chr_properties,
chr, chr_iface_destroy)) {
printf("Couldn't register characteristic interface\n");
ret = FALSE;
}
return ret;
}
static char *register_service(const char *uuid)
{
static int id = 1;
char *path;
path = g_strdup_printf("/service%d", id++);
if (!g_dbus_register_interface(connection, path, GATT_SERVICE_IFACE,
NULL, NULL, service_properties,
g_strdup(uuid), g_free)) {
printf("Couldn't register service interface\n");
g_free(path);
return NULL;
}
return path;
}
static void create_services()
{
char *service_path;
uint8_t level = 0;
service_path = register_service(IAS_UUID);
if (!service_path)
return;
/* Add Alert Level Characteristic to Immediate Alert Service
* According to the IAS SPEC, reading <<Alert level>> is not allowed.
* "Value" is readable for testing purpose only.
*/
if (!register_characteristic(connection, ALERT_LEVEL_CHR_UUID, &level,
sizeof(level), service_path)) {
printf("Couldn't register Alert Level characteristic (IAS)\n");
g_dbus_unregister_interface(connection, service_path,
GATT_SERVICE_IFACE);
g_free(service_path);
return;
}
services = g_slist_prepend(services, service_path);
printf("Registered service: %s\n", service_path);
}
static void register_external_service_reply(DBusPendingCall *call,
void *user_data)
{
DBusMessage *reply = dbus_pending_call_steal_reply(call);
DBusError derr;
dbus_error_init(&derr);
dbus_set_error_from_message(&derr, reply);
if (dbus_error_is_set(&derr))
printf("RegisterService: %s\n", derr.message);
else
printf("RegisterService: OK\n");
dbus_message_unref(reply);
dbus_error_free(&derr);
}
static void register_external_service(gpointer a, gpointer b)
{
DBusConnection *conn = b;
const char *path = a;
DBusMessage *msg;
DBusPendingCall *call;
DBusMessageIter iter, dict;
msg = dbus_message_new_method_call("org.bluez", "/org/bluez",
GATT_MGR_IFACE, "RegisterService");
if (!msg) {
printf("Couldn't allocate D-Bus message\n");
return;
}
dbus_message_iter_init_append(msg, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_OBJECT_PATH, &path);
dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &dict);
/* TODO: Add options dictionary */
dbus_message_iter_close_container(&iter, &dict);
if (!g_dbus_send_message_with_reply(conn, msg, &call, -1)) {
dbus_message_unref(msg);
return;
}
dbus_pending_call_set_notify(call, register_external_service_reply,
NULL, NULL);
dbus_pending_call_unref(call);
}
static void connect_handler(DBusConnection *conn, void *user_data)
{
g_slist_foreach(services, register_external_service, conn);
}
static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
gpointer user_data)
{
static bool __terminated = false;
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) {
printf("Terminating\n");
g_main_loop_quit(main_loop);
}
__terminated = true;
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;
}
int main(int argc, char *argv[])
{
GDBusClient *client;
guint signal;
signal = setup_signalfd();
if (signal == 0)
return -errno;
connection = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL, NULL);
main_loop = g_main_loop_new(NULL, FALSE);
g_dbus_attach_object_manager(connection);
printf("gatt-service unique name: %s\n",
dbus_bus_get_unique_name(connection));
create_services();
client = g_dbus_client_new(connection, "org.bluez", "/org/bluez");
g_dbus_client_set_connect_watch(client, connect_handler, NULL);
g_main_loop_run(main_loop);
g_dbus_client_unref(client);
g_source_remove(signal);
g_slist_free_full(services, g_free);
dbus_connection_unref(connection);
return 0;
}