/*
* Wireless utility functions
*
* Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
*/
#include <linux/export.h>
#include <linux/bitops.h>
#include <linux/etherdevice.h>
#include <linux/slab.h>
#include <net/cfg80211.h>
#include <net/ip.h>
#include <net/dsfield.h>
#include "core.h"
#include "rdev-ops.h"
struct ieee80211_rate *
ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
u32 basic_rates, int bitrate)
{
struct ieee80211_rate *result = &sband->bitrates[0];
int i;
for (i = 0; i < sband->n_bitrates; i++) {
if (!(basic_rates & BIT(i)))
continue;
if (sband->bitrates[i].bitrate > bitrate)
continue;
result = &sband->bitrates[i];
}
return result;
}
EXPORT_SYMBOL(ieee80211_get_response_rate);
int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
{
/* see 802.11 17.3.8.3.2 and Annex J
* there are overlapping channel numbers in 5GHz and 2GHz bands */
if (chan <= 0)
return 0; /* not supported */
switch (band) {
case IEEE80211_BAND_2GHZ:
if (chan == 14)
return 2484;
else if (chan < 14)
return 2407 + chan * 5;
break;
case IEEE80211_BAND_5GHZ:
if (chan >= 182 && chan <= 196)
return 