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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include "lib/bluetooth.h"
#include "lib/sdp.h"
#include "log.h"
#include "adapter.h"
#include "btd.h"
enum rfkill_type {
RFKILL_TYPE_ALL = 0,
RFKILL_TYPE_WLAN,
RFKILL_TYPE_BLUETOOTH,
RFKILL_TYPE_UWB,
RFKILL_TYPE_WIMAX,
RFKILL_TYPE_WWAN,
};
enum rfkill_operation {
RFKILL_OP_ADD = 0,
RFKILL_OP_DEL,
RFKILL_OP_CHANGE,
RFKILL_OP_CHANGE_ALL,
};
struct rfkill_event {
uint32_t idx;
uint8_t type;
uint8_t op;
uint8_t soft;
uint8_t hard;
};
#define RFKILL_EVENT_SIZE_V1 8
static int get_adapter_id_for_rfkill(int rfkill_id)
{
char sysname[PATH_MAX];
int namefd;
snprintf(sysname, sizeof(sysname) - 1,
"/sys/class/rfkill/rfkill%u/name", rfkill_id);
namefd = open(sysname, O_RDONLY);
if (namefd < 0)
return -1;
memset(sysname, 0, sizeof(sysname));
if (read(namefd, sysname, sizeof(sysname) - 1) < 4) {
close(namefd);
return -1;
}
close(namefd);
if (g_str_has_prefix(sysname, "hci") == FALSE)
return -1;
return atoi(sysname + 3);
}
int rfkill_get_blocked(uint16_t index)
{
int fd;
int blocked = -1;
fd = open("/dev/rfkill", O_RDWR);
if (fd < 0) {
DBG("Failed to open RFKILL control device");
return -1;
}
while (1) {
struct rfkill_event event = { 0 };
int id;
ssize_t len;
len = read(fd, &event, sizeof(event));
if (len < RFKILL_EVENT_SIZE_V1)
break;
id = get_adapter_id_for_rfkill(event.idx);
if (index == id) {
blocked = event.soft || event.hard;
break;
}
}
close(fd);
return blocked;
}
static gboolean rfkill_event(GIOChannel *chan,
GIOCondition cond, gpointer data)
{
struct rfkill_event event = { 0 };
struct btd_adapter *adapter;
bool blocked = false;
ssize_t len;
int fd, id;
if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
return FALSE;
fd = g_io_channel_unix_get_fd(chan);
len = read(fd, &event, sizeof(event));
if (len < 0) {
if (errno == EAGAIN)
return TRUE;
return FALSE;
}
if (len < RFKILL_EVENT_SIZE_V1)
return TRUE;
DBG("RFKILL event idx %u type %u op %u soft %u hard %u",
event.idx, event.type, event.op,
event.soft, event.hard);
if (event.soft || event.hard)
blocked = true;
if (event.op != RFKILL_OP_CHANGE)
return TRUE;
if (event.type != RFKILL_TYPE_BLUETOOTH &&
event.type != RFKILL_TYPE_ALL)
return TRUE;
id = get_adapter_id_for_rfkill(event.idx);
if (id < 0)
return TRUE;
adapter = adapter_find_by_id(id);
if (!adapter)
return TRUE;
DBG("RFKILL unblock for hci%d", id);
if (blocked)
btd_adapter_set_blocked(adapter);
else
btd_adapter_restore_powered(adapter);
return TRUE;
}
static guint watch = 0;
void rfkill_init(void)
{
int fd;
GIOChannel *channel;
fd = open("/dev/rfkill", O_RDWR);
if (fd < 0) {
error("Failed to open RFKILL control device");
return;
}
channel = g_io_channel_unix_new(fd);
g_io_channel_set_close_on_unref(channel, TRUE);
watch = g_io_add_watch(channel,
G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
rfkill_event, NULL);
g_io_channel_unref(channel);
}
void rfkill_exit(void)
{
if (watch == 0)
return;
g_source_remove(watch);
watch = 0;
}
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