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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2011 Nokia Corporation
* Copyright (C) 2011 Marcel Holtmann <marcel@holtmann.org>
*
*
* 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 <glib.h>
#include <time.h>
#include <errno.h>
#include <stdbool.h>
#include <adapter.h>
#include <device.h>
#include <profile.h>
#include <plugin.h>
#include "lib/uuid.h"
#include "attrib/gattrib.h"
#include "attrib/att.h"
#include "attrib/gatt.h"
#include "attrib/att-database.h"
#include "attrib-server.h"
#include "attrib/gatt-service.h"
#include "log.h"
#define CURRENT_TIME_SVC_UUID 0x1805
#define REF_TIME_UPDATE_SVC_UUID 0x1806
#define LOCAL_TIME_INFO_CHR_UUID 0x2A0F
#define TIME_UPDATE_CTRL_CHR_UUID 0x2A16
#define TIME_UPDATE_STAT_CHR_UUID 0x2A17
#define CT_TIME_CHR_UUID 0x2A2B
enum {
UPDATE_RESULT_SUCCESSFUL = 0,
UPDATE_RESULT_CANCELED = 1,
UPDATE_RESULT_NO_CONN = 2,
UPDATE_RESULT_ERROR = 3,
UPDATE_RESULT_TIMEOUT = 4,
UPDATE_RESULT_NOT_ATTEMPTED = 5,
};
enum {
UPDATE_STATE_IDLE = 0,
UPDATE_STATE_PENDING = 1,
};
enum {
GET_REFERENCE_UPDATE = 1,
CANCEL_REFERENCE_UPDATE = 2,
};
static int encode_current_time(uint8_t value[10])
{
struct timespec tp;
struct tm tm;
if (clock_gettime(CLOCK_REALTIME, &tp) == -1) {
int err = -errno;
error("clock_gettime: %s", strerror(-err));
return err;
}
if (localtime_r(&tp.tv_sec, &tm) == NULL) {
error("localtime_r() failed");
/* localtime_r() does not set errno */
return -EINVAL;
}
att_put_u16(1900 + tm.tm_year, &value[0]); /* Year */
value[2] = tm.tm_mon + 1; /* Month */
value[3] = tm.tm_mday; /* Day */
value[4] = tm.tm_hour; /* Hours */
value[5] = tm.tm_min; /* Minutes */
value[6] = tm.tm_sec; /* Seconds */
value[7] = tm.tm_wday == 0 ? 7 : tm.tm_wday; /* Day of Week */
/* From Time Profile spec: "The number of 1/256 fractions of a second."
* In 1s there are 256 fractions, in 1ns there are 256/10^9 fractions.
* To avoid integer overflow, we use the equivalent 1/3906250 ratio. */
value[8] = tp.tv_nsec / 3906250; /* Fractions256 */
value[9] = 0x00; /* Adjust Reason */
return 0;
}
static uint8_t current_time_read(struct attribute *a,
struct btd_device *device, gpointer user_data)
{
struct btd_adapter *adapter = user_data;
uint8_t value[10];
if (encode_current_time(value) < 0)
return ATT_ECODE_IO;
attrib_db_update(adapter, a->handle, NULL, value, sizeof(value), NULL);
return 0;
}
static uint8_t local_time_info_read(struct attribute *a,
struct btd_device *device, gpointer user_data)
{
struct btd_adapter *adapter = user_data;
uint8_t value[2];
DBG("a=%p", a);
tzset();
/* Convert POSIX "timezone" (seconds West of GMT) to Time Profile
* format (offset from UTC in number of 15 minutes increments). */
value[0] = (uint8_t) (-1 * timezone / (60 * 15));
/* FIXME: POSIX "daylight" variable only indicates whether there
* is DST for the local time or not. The offset is unknown. */
value[1] = daylight ? 0xff : 0x00;
attrib_db_update(adapter, a->handle, NULL, value, sizeof(value), NULL);
return 0;
}
static gboolean register_current_time_service(struct btd_adapter *adapter)
{
bt_uuid_t uuid;
bt_uuid16_create(&uuid, CURRENT_TIME_SVC_UUID);
/* Current Time service */
return gatt_service_add(adapter, GATT_PRIM_SVC_UUID, &uuid,
/* CT Time characteristic */
GATT_OPT_CHR_UUID16, CT_TIME_CHR_UUID,
GATT_OPT_CHR_PROPS, ATT_CHAR_PROPER_READ |
ATT_CHAR_PROPER_NOTIFY,
GATT_OPT_CHR_VALUE_CB, ATTRIB_READ,
current_time_read, adapter,
/* Local Time Information characteristic */
GATT_OPT_CHR_UUID16, LOCAL_TIME_INFO_CHR_UUID,
GATT_OPT_CHR_PROPS, ATT_CHAR_PROPER_READ,
GATT_OPT_CHR_VALUE_CB, ATTRIB_READ,
local_time_info_read, adapter,
GATT_OPT_INVALID);
}
static uint8_t time_update_control(struct attribute *a,
struct btd_device *device,
gpointer user_data)
{
DBG("handle 0x%04x", a->handle);
if (a->len != 1)
DBG("Invalid control point value size: %zu", a->len);
switch (a->data[0]) {
case GET_REFERENCE_UPDATE:
DBG("Get Reference Update");
break;
case CANCEL_REFERENCE_UPDATE:
DBG("Cancel Reference Update");
break;
default:
DBG("Unknown command: 0x%02x", a->data[0]);
}
return 0;
}
static uint8_t time_update_status(struct attribute *a,
struct btd_device *device,
gpointer user_data)
{
struct btd_adapter *adapter = user_data;
uint8_t value[2];
DBG("handle 0x%04x", a->handle);
value[0] = UPDATE_STATE_IDLE;
value[1] = UPDATE_RESULT_SUCCESSFUL;
attrib_db_update(adapter, a->handle, NULL, value, sizeof(value), NULL);
return 0;
}
static gboolean register_ref_time_update_service(struct btd_adapter *adapter)
{
bt_uuid_t uuid;
bt_uuid16_create(&uuid, REF_TIME_UPDATE_SVC_UUID);
/* Reference Time Update service */
return gatt_service_add(adapter, GATT_PRIM_SVC_UUID, &uuid,
/* Time Update control point */
GATT_OPT_CHR_UUID16, TIME_UPDATE_CTRL_CHR_UUID,
GATT_OPT_CHR_PROPS,
ATT_CHAR_PROPER_WRITE_WITHOUT_RESP,
GATT_OPT_CHR_VALUE_CB, ATTRIB_WRITE,
time_update_control, adapter,
/* Time Update status */
GATT_OPT_CHR_UUID16, TIME_UPDATE_STAT_CHR_UUID,
GATT_OPT_CHR_PROPS, ATT_CHAR_PROPER_READ,
GATT_OPT_CHR_VALUE_CB, ATTRIB_READ,
time_update_status, adapter,
GATT_OPT_INVALID);
}
static int time_server_init(struct btd_profile *p, struct btd_adapter *adapter)
{
const char *path = adapter_get_path(adapter);
DBG("path %s", path);
if (!register_current_time_service(adapter)) {
error("Current Time Service could not be registered");
return -EIO;
}
if (!register_ref_time_update_service(adapter)) {
error("Reference Time Update Service could not be registered");
return -EIO;
}
return 0;
}
static void time_server_exit(struct btd_profile *p,
struct btd_adapter *adapter)
{
const char *path = adapter_get_path(adapter);
DBG("path %s", path);
}
struct btd_profile time_profile = {
.name = "gatt-time-server",
.adapter_probe = time_server_init,
.adapter_remove = time_server_exit,
};
static int time_init(void)
{
return btd_profile_register(&time_profile);
}
static void time_exit(void)
{
btd_profile_unregister(&time_profile);
}
BLUETOOTH_PLUGIN_DEFINE(time, VERSION,
BLUETOOTH_PLUGIN_PRIORITY_DEFAULT,
time_init, time_exit)
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