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/*
* Copyright 2018 Konsulko Group
* Author: Matt Ranostay <matt.ranostay@konsulko.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/rfkill.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <gio/gio.h>
#define AFB_BINDING_VERSION 3
#include <afb/afb-binding.h>
#define HCIDEVUP _IOW('H', 201, int)
#define BTPROTO_HCI 1
static int hci_interface_enable(int hdev)
{
int ctl = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
int ret;
if (ctl < 0)
return ctl;
ret = ioctl(ctl, HCIDEVUP, hdev);
close(ctl);
return ret;
}
static gboolean bluetooth_rfkill_event(GIOChannel *chan, GIOCondition cond, gpointer ptr)
{
struct rfkill_event event;
gchar *name, buf[8];
ssize_t len;
int fd;
fd = g_io_channel_unix_get_fd(chan);
len = read(fd, &event, sizeof(struct rfkill_event));
if (len != sizeof(struct rfkill_event))
return TRUE;
if (event.type != RFKILL_TYPE_BLUETOOTH)
return TRUE;
if (event.op == RFKILL_OP_DEL)
return TRUE;
name = g_strdup_printf("/sys/class/rfkill/rfkill%u/soft", event.idx);
fd = g_open(name, O_WRONLY);
len = write(fd, "0", 1);
g_close(fd, NULL);
g_free(name);
memset(&buf, 0, sizeof(buf));
name = g_strdup_printf("/sys/class/rfkill/rfkill%u/name", event.idx);
fd = g_open(name, O_RDONLY);
len = read(fd, &buf, sizeof(buf) - 1);
if (len > 0)
{
int idx = 0;
sscanf(buf, "hci%d", &idx);
/*
* 50 millisecond delay to allow time for rfkill to unblock before
* attempting to bring up HCI interface
*/
g_usleep(50000);
hci_interface_enable(idx);
}
g_free(name);
return TRUE;
}
int bluetooth_monitor_init(void)
{
int fd = g_open("/dev/rfkill", O_RDWR);
GIOChannel *chan = NULL;
int ret = -EINVAL;
if (fd < 0)
{
AFB_ERROR("Cannot open /dev/rfkill");
return ret;
}
chan = g_io_channel_unix_new(fd);
g_io_channel_set_close_on_unref(chan, TRUE);
ret = g_io_add_watch(chan, G_IO_IN, bluetooth_rfkill_event, NULL);
g_io_channel_unref(chan);
return 0;
}
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