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/*
* wprobe-core.c: Wireless probe interface dummy driver
* Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.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.
*/
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/random.h>
#include <linux/wprobe.h>
static const char local_addr[] = "\x00\x13\x37\xba\xbe\x00";
enum dummy_global_values {
DUMMY_GLOBAL_MEDIUM_BUSY
};
enum dummy_link_values {
DUMMY_LINK_SNR
};
struct wprobe_item dummy_perlink[] = {
[DUMMY_LINK_SNR] = {
.name = "snr",
.type = WPROBE_VAL_U8,
.flags = WPROBE_F_KEEPSTAT,
},
};
struct wprobe_item dummy_globals[] = {
[DUMMY_GLOBAL_MEDIUM_BUSY] = {
.name = "medium_busy",
.type = WPROBE_VAL_U8,
.flags = WPROBE_F_KEEPSTAT,
}
};
int dummy_sync(struct wprobe_iface *dev, struct wprobe_link *l, struct wprobe_value *val, bool measure)
{
u8 intval = 0;
get_random_bytes(&intval, 1);
if (l) {
WPROBE_FILL_BEGIN(val, dummy_perlink);
WPROBE_SET(DUMMY_LINK_SNR, U8, (intval % 40));
WPROBE_FILL_END();
} else {
WPROBE_FILL_BEGIN(val, dummy_globals);
WPROBE_SET(DUMMY_GLOBAL_MEDIUM_BUSY, U8, (intval % 100));
WPROBE_FILL_END();
}
return 0;
}
static struct wprobe_iface dummy_dev = {
.name = "dummy",
.addr = local_addr,
.link_items = dummy_perlink,
.n_link_items = ARRAY_SIZE(dummy_perlink),
.global_items = dummy_globals,
.n_global_items = ARRAY_SIZE(dummy_globals),
.sync_data = dummy_sync,
};
static struct wprobe_link dummy_link;
static int __init
wprobe_dummy_init(void)
{
wprobe_add_iface(&dummy_dev);
wprobe_add_link(&dummy_dev, &dummy_link, "\x00\x13\x37\xda\xda\x00");
return 0;
}
static void __exit
wprobe_dummy_exit(void)
{
wprobe_remove_link(&dummy_dev, &dummy_link);
wprobe_remove_iface(&dummy_dev);
}
module_init(wprobe_dummy_init);
module_exit(wprobe_dummy_exit);
MODULE_LICENSE("GPL");
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