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Use a common frequency to channel conversion function

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-04-27 21:27:15 +03:00
parent 02db75b6c2
commit e864c0aefe
5 changed files with 42 additions and 76 deletions
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28
src/common/ieee802_11_common.c
View File

@ -1,6 +1,6 @@
/*
* IEEE 802.11 Common routines
* Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
* Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -9,6 +9,7 @@
#include "includes.h"
#include "common.h"
#include "defs.h"
#include "ieee802_11_defs.h"
#include "ieee802_11_common.h"
@ -486,3 +487,28 @@ int hostapd_config_wmm_ac(struct hostapd_wmm_ac_params wmm_ac_params[],
return 0;
}
enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel)
{
enum hostapd_hw_mode mode = NUM_HOSTAPD_MODES;
if (freq >= 2412 && freq <= 2472) {
mode = HOSTAPD_MODE_IEEE80211G;
*channel = (freq - 2407) / 5;
} else if (freq == 2484) {
mode = HOSTAPD_MODE_IEEE80211B;
*channel = 14;
} else if (freq >= 4900 && freq < 5000) {
mode = HOSTAPD_MODE_IEEE80211A;
*channel = (freq - 4000) / 5;
} else if (freq >= 5000 && freq < 5900) {
mode = HOSTAPD_MODE_IEEE80211A;
*channel = (freq - 5000) / 5;
} else if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
mode = HOSTAPD_MODE_IEEE80211AD;
*channel = (freq - 56160) / 2160;
}
return mode;
}

1
src/common/ieee802_11_common.h
View File

@ -99,5 +99,6 @@ struct hostapd_wmm_ac_params {
int hostapd_config_wmm_ac(struct hostapd_wmm_ac_params wmm_ac_params[],
const char *name, const char *val);
enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel);
#endif /* IEEE802_11_COMMON_H */

30
src/drivers/driver_nl80211.c
View File

@ -5103,35 +5103,11 @@ static void phy_info_freq(struct hostapd_hw_modes *mode,
struct hostapd_channel_data *chan,
struct nlattr *tb_freq[])
{
enum hostapd_hw_mode m;
u8 channel;
chan->freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
chan->flag = 0;
if (chan->freq < 4000)
m = HOSTAPD_MODE_IEEE80211B;
else if (chan->freq > 50000)
m = HOSTAPD_MODE_IEEE80211AD;
else
m = HOSTAPD_MODE_IEEE80211A;
switch (m) {
case HOSTAPD_MODE_IEEE80211AD:
chan->chan = (chan->freq - 56160) / 2160;
break;
case HOSTAPD_MODE_IEEE80211A:
chan->chan = chan->freq / 5 - 1000;
break;
case HOSTAPD_MODE_IEEE80211B:
case HOSTAPD_MODE_IEEE80211G:
if (chan->freq == 2484)
chan->chan = 14;
else
chan->chan = (chan->freq - 2407) / 5;
break;
default:
break;
}
if (ieee80211_freq_to_chan(chan->freq, &channel) != NUM_HOSTAPD_MODES)
chan->chan = channel;
if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
chan->flag |= HOSTAPD_CHAN_DISABLED;

21
wpa_supplicant/ap.c
View File

@ -55,21 +55,14 @@ static int wpa_supplicant_conf_ap(struct wpa_supplicant *wpa_s,
/* default channel 11 */
conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
conf->channel = 11;
} else if (ssid->frequency >= 2412 && ssid->frequency <= 2472) {
conf->hw_mode = HOSTAPD_MODE_IEEE80211G;
conf->channel = (ssid->frequency - 2407) / 5;
} else if ((ssid->frequency >= 5180 && ssid->frequency <= 5240) ||
(ssid->frequency >= 5745 && ssid->frequency <= 5825)) {
conf->hw_mode = HOSTAPD_MODE_IEEE80211A;
conf->channel = (ssid->frequency - 5000) / 5;
} else if (ssid->frequency >= 56160 + 2160 * 1 &&
ssid->frequency <= 56160 + 2160 * 4) {
conf->hw_mode = HOSTAPD_MODE_IEEE80211AD;
conf->channel = (ssid->frequency - 56160) / 2160;
} else {
wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: %d MHz",
ssid->frequency);
return -1;
conf->hw_mode = ieee80211_freq_to_chan(ssid->frequency,
&conf->channel);
if (conf->hw_mode == NUM_HOSTAPD_MODES) {
wpa_printf(MSG_ERROR, "Unsupported AP mode frequency: "
"%d MHz", ssid->frequency);
return -1;
}
}
/* TODO: enable HT40 if driver supports it;

38
wpa_supplicant/sme.c
View File

@ -942,39 +942,6 @@ static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
}
/**
* enum wpas_band - Frequency band
* @WPAS_BAND_2GHZ: 2.4 GHz ISM band
* @WPAS_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
*/
enum wpas_band {
WPAS_BAND_2GHZ,
WPAS_BAND_5GHZ,
WPAS_BAND_INVALID
};
/**
* freq_to_channel - Convert frequency into channel info
* @channel: Buffer for returning channel number
* Returns: Band (2 or 5 GHz)
*/
static enum wpas_band freq_to_channel(int freq, u8 *channel)
{
enum wpas_band band = (freq <= 2484) ? WPAS_BAND_2GHZ : WPAS_BAND_5GHZ;
u8 chan = 0;
if (freq >= 2412 && freq <= 2472)
chan = (freq - 2407) / 5;
else if (freq == 2484)
chan = 14;
else if (freq >= 5180 && freq <= 5805)
chan = (freq - 5000) / 5;
*channel = chan;
return band;
}
int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
@ -1011,7 +978,10 @@ int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
/* Skip other band bss */
if (freq_to_channel(bss->freq, &channel) != WPAS_BAND_2GHZ)
enum hostapd_hw_mode mode;
mode = ieee80211_freq_to_chan(bss->freq, &channel);
if (mode != HOSTAPD_MODE_IEEE80211G &&
mode != HOSTAPD_MODE_IEEE80211B)
continue;
ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);