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Use frequency in HT/VHT validation steps done before starting AP

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Using the channel parameter for validating allowed channel combinations
is not scalable to add 6 GHz support in the future since channel numbers
are duplicated between 2.4 GHz / 5 GHz bands and 6 GHz band. Hence use
frequency field for all channel combination validation steps done before
starting AP.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Ankita Bajaj 2019-11-19 15:54:44 +05:30 committed by Jouni Malinen
parent 59e33b4a98
commit 5f9b4afdfa
5 changed files with 106 additions and 70 deletions
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2
src/ap/hostapd.c
View file

@ -1915,7 +1915,7 @@ static int hostapd_setup_interface_complete_sync(struct hostapd_iface *iface,
goto fail;
wpa_printf(MSG_DEBUG, "Completing interface initialization");
if (iface->conf->channel) {
if (iface->freq) {
#ifdef NEED_AP_MLME
int res;
#endif /* NEED_AP_MLME */

108
src/ap/hw_features.c
View file

@ -227,13 +227,25 @@ int hostapd_prepare_rates(struct hostapd_iface *iface,
#ifdef CONFIG_IEEE80211N
static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface)
{
int pri_chan, sec_chan;
int pri_freq, sec_freq;
struct hostapd_channel_data *p_chan, *s_chan;
pri_chan = iface->conf->channel;
sec_chan = pri_chan + iface->conf->secondary_channel * 4;
pri_freq = iface->freq;
sec_freq = pri_freq + iface->conf->secondary_channel * 20;
return allowed_ht40_channel_pair(iface->current_mode, pri_chan,
sec_chan);
if (!iface->current_mode)
return 0;
p_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq, NULL,
iface->hw_features,
iface->num_hw_features);
s_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq, NULL,
iface->hw_features,
iface->num_hw_features);
return allowed_ht40_channel_pair(iface->current_mode->mode,
p_chan, s_chan);
}
@ -241,9 +253,11 @@ static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
{
if (iface->conf->secondary_channel > 0) {
iface->conf->channel += 4;
iface->freq += 20;
iface->conf->secondary_channel = -1;
} else {
iface->conf->channel -= 4;
iface->freq -= 20;
iface->conf->secondary_channel = 1;
}
}
@ -252,13 +266,23 @@ static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
struct wpa_scan_results *scan_res)
{
int pri_chan, sec_chan;
unsigned int pri_freq, sec_freq;
int res;
struct hostapd_channel_data *pri_chan, *sec_chan;
pri_chan = iface->conf->channel;
sec_chan = pri_chan + iface->conf->secondary_channel * 4;
pri_freq = iface->freq;
sec_freq = pri_freq + iface->conf->secondary_channel * 20;
res = check_40mhz_5g(iface->current_mode, scan_res, pri_chan, sec_chan);
if (!iface->current_mode)
return 0;
pri_chan = hw_get_channel_freq(iface->current_mode->mode, pri_freq,
NULL, iface->hw_features,
iface->num_hw_features);
sec_chan = hw_get_channel_freq(iface->current_mode->mode, sec_freq,
NULL, iface->hw_features,
iface->num_hw_features);
res = check_40mhz_5g(scan_res, pri_chan, sec_chan);
if (res == 2) {
if (iface->conf->no_pri_sec_switch) {
@ -352,7 +376,7 @@ static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface,
if (iface->current_mode == NULL)
return;
pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
pri_freq = iface->freq;
if (iface->conf->secondary_channel > 0)
sec_freq = pri_freq + 20;
else
@ -397,7 +421,7 @@ static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface,
if (iface->current_mode == NULL)
return;
pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
pri_freq = iface->freq;
if (iface->conf->secondary_channel > 0) {
affected_start = pri_freq - 10;
affected_end = pri_freq + 30;
@ -734,14 +758,15 @@ int hostapd_check_edmg_capab(struct hostapd_iface *iface)
static int hostapd_is_usable_chan(struct hostapd_iface *iface,
int channel, int primary)
int frequency, int primary)
{
struct hostapd_channel_data *chan;
if (!iface->current_mode)
return 0;
chan = hw_get_channel_chan(iface->current_mode, channel, NULL);
chan = hw_get_channel_freq(iface->current_mode->mode, frequency, NULL,
iface->hw_features, iface->num_hw_features);
if (!chan)
return 0;
@ -750,8 +775,8 @@ static int hostapd_is_usable_chan(struct hostapd_iface *iface,
return 1;
wpa_printf(MSG_INFO,
"Channel %d (%s) not allowed for AP mode, flags: 0x%x%s%s",
channel, primary ? "primary" : "secondary",
"Frequency %d (%s) not allowed for AP mode, flags: 0x%x%s%s",
frequency, primary ? "primary" : "secondary",
chan->flag,
chan->flag & HOSTAPD_CHAN_NO_IR ? " NO-IR" : "",
chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : "");
@ -765,19 +790,28 @@ static int hostapd_is_usable_edmg(struct hostapd_iface *iface)
int num_of_enabled = 0;
int max_contiguous = 0;
struct ieee80211_edmg_config edmg;
struct hostapd_channel_data *pri_chan;
if (!iface->conf->enable_edmg)
return 1;
if (!iface->current_mode)
return 0;
pri_chan = hw_get_channel_freq(iface->current_mode->mode,
iface->freq, NULL,
iface->hw_features,
iface->num_hw_features);
hostapd_encode_edmg_chan(iface->conf->enable_edmg,
iface->conf->edmg_channel,
iface->conf->channel,
pri_chan->chan,
&edmg);
if (!(edmg.channels & BIT(iface->conf->channel - 1)))
if (!(edmg.channels & BIT(pri_chan->chan - 1)))
return 0;
/* 60 GHz channels 1..6 */
for (i = 0; i < 6; i++) {
int freq = 56160 + 2160 * i;
if (edmg.channels & BIT(i)) {
contiguous++;
num_of_enabled++;
@ -792,7 +826,7 @@ static int hostapd_is_usable_edmg(struct hostapd_iface *iface)
if (num_of_enabled > 4)
return 0;
if (!hostapd_is_usable_chan(iface, i + 1, 1))
if (!hostapd_is_usable_chan(iface, freq, 1))
return 0;
if (contiguous > max_contiguous)
@ -822,17 +856,23 @@ static int hostapd_is_usable_edmg(struct hostapd_iface *iface)
static int hostapd_is_usable_chans(struct hostapd_iface *iface)
{
int secondary_chan;
int secondary_freq;
struct hostapd_channel_data *pri_chan;
pri_chan = hw_get_channel_chan(iface->current_mode,
iface->conf->channel, NULL);
if (!pri_chan)
if (!iface->current_mode)
return 0;
if (!hostapd_is_usable_chan(iface, iface->conf->channel, 1))
pri_chan = hw_get_channel_freq(iface->current_mode->mode,
iface->freq, NULL,
iface->hw_features,
iface->num_hw_features);
if (!pri_chan) {
wpa_printf(MSG_ERROR, "Primary frequency not present");
return 0;
}
if (!hostapd_is_usable_chan(iface, pri_chan->freq, 1)) {
wpa_printf(MSG_ERROR, "Primary frequency not allowed");
return 0;
}
if (!hostapd_is_usable_edmg(iface))
return 0;
@ -841,19 +881,19 @@ static int hostapd_is_usable_chans(struct hostapd_iface *iface)
if (!iface->conf->ht40_plus_minus_allowed)
return hostapd_is_usable_chan(
iface, iface->conf->channel +
iface->conf->secondary_channel * 4, 0);
iface,
iface->freq + iface->conf->secondary_channel * 20, 0);
/* Both HT40+ and HT40- are set, pick a valid secondary channel */
secondary_chan = iface->conf->channel + 4;
if (hostapd_is_usable_chan(iface, secondary_chan, 0) &&
secondary_freq = iface->freq + 20;
if (hostapd_is_usable_chan(iface, secondary_freq, 0) &&
(pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) {
iface->conf->secondary_channel = 1;
return 1;
}
secondary_chan = iface->conf->channel - 4;
if (hostapd_is_usable_chan(iface, secondary_chan, 0) &&
secondary_freq = iface->freq - 20;
if (hostapd_is_usable_chan(iface, secondary_freq, 0) &&
(pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M)) {
iface->conf->secondary_channel = -1;
return 1;
@ -866,7 +906,7 @@ static int hostapd_is_usable_chans(struct hostapd_iface *iface)
static enum hostapd_chan_status
hostapd_check_chans(struct hostapd_iface *iface)
{
if (iface->conf->channel) {
if (iface->freq) {
if (hostapd_is_usable_chans(iface))
return HOSTAPD_CHAN_VALID;
else
@ -900,9 +940,9 @@ static void hostapd_notify_bad_chans(struct hostapd_iface *iface)
hostapd_logger(iface->bss[0], NULL,
HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_WARNING,
"Configured channel (%d) not found from the "
"channel list of current mode (%d) %s",
"Configured channel (%d) or frequency (%d) not found from the channel list of the current mode (%d) %s",
iface->conf->channel,
iface->freq,
iface->current_mode->mode,
hostapd_hw_mode_txt(iface->current_mode->mode));
hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,

52
src/common/hw_features_common.c
View file

@ -94,19 +94,22 @@ int hw_get_chan(enum hostapd_hw_mode mode, int freq,
}
int allowed_ht40_channel_pair(struct hostapd_hw_modes *mode, int pri_chan,
int sec_chan)
int allowed_ht40_channel_pair(enum hostapd_hw_mode mode,
struct hostapd_channel_data *p_chan,
struct hostapd_channel_data *s_chan)
{
int ok, first;
int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 140,
149, 157, 165, 184, 192 };
size_t k;
struct hostapd_channel_data *p_chan, *s_chan;
const int ht40_plus = pri_chan < sec_chan;
int ht40_plus, pri_chan, sec_chan;
p_chan = hw_get_channel_chan(mode, pri_chan, NULL);
if (!p_chan)
if (!p_chan || !s_chan)
return 0;
pri_chan = p_chan->chan;
sec_chan = s_chan->chan;
ht40_plus = pri_chan < sec_chan;
if (pri_chan == sec_chan || !sec_chan) {
if (chan_pri_allowed(p_chan))
@ -117,13 +120,9 @@ int allowed_ht40_channel_pair(struct hostapd_hw_modes *mode, int pri_chan,
return 0;
}
s_chan = hw_get_channel_chan(mode, sec_chan, NULL);
if (!s_chan)
return 0;
wpa_printf(MSG_DEBUG,
"HT40: control channel: %d secondary channel: %d",
pri_chan, sec_chan);
"HT40: control channel: %d (%d MHz), secondary channel: %d (%d MHz)",
pri_chan, p_chan->freq, sec_chan, s_chan->freq);
/* Verify that HT40 secondary channel is an allowed 20 MHz
* channel */
@ -141,7 +140,7 @@ int allowed_ht40_channel_pair(struct hostapd_hw_modes *mode, int pri_chan,
* 2.4 GHz rules allow all cases where the secondary channel fits into
* the list of allowed channels (already checked above).
*/
if (mode->mode != HOSTAPD_MODE_IEEE80211A)
if (mode != HOSTAPD_MODE_IEEE80211A)
return 1;
first = pri_chan < sec_chan ? pri_chan : sec_chan;
@ -186,22 +185,19 @@ void get_pri_sec_chan(struct wpa_scan_res *bss, int *pri_chan, int *sec_chan)
}
int check_40mhz_5g(struct hostapd_hw_modes *mode,
struct wpa_scan_results *scan_res, int pri_chan,
int sec_chan)
int check_40mhz_5g(struct wpa_scan_results *scan_res,
struct hostapd_channel_data *pri_chan,
struct hostapd_channel_data *sec_chan)
{
int pri_freq, sec_freq, pri_bss, sec_bss;
int pri_bss, sec_bss;
int bss_pri_chan, bss_sec_chan;
size_t i;
int match;
if (!mode || !scan_res || !pri_chan || !sec_chan ||
pri_chan == sec_chan)
if (!scan_res || !pri_chan || !sec_chan ||
pri_chan->freq == sec_chan->freq)
return 0;
pri_freq = hw_get_freq(mode, pri_chan);
sec_freq = hw_get_freq(mode, sec_chan);
/*
* Switch PRI/SEC channels if Beacons were detected on selected SEC
* channel, but not on selected PRI channel.
@ -209,9 +205,9 @@ int check_40mhz_5g(struct hostapd_hw_modes *mode,
pri_bss = sec_bss = 0;
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *bss = scan_res->res[i];
if (bss->freq == pri_freq)
if (bss->freq == pri_chan->freq)
pri_bss++;
else if (bss->freq == sec_freq)
else if (bss->freq == sec_chan->freq)
sec_bss++;
}
if (sec_bss && !pri_bss) {
@ -229,8 +225,8 @@ int check_40mhz_5g(struct hostapd_hw_modes *mode,
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *bss = scan_res->res[i];
get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
if (pri_chan == bss_pri_chan &&
sec_chan == bss_sec_chan) {
if (pri_chan->chan == bss_pri_chan &&
sec_chan->chan == bss_sec_chan) {
match = 1;
break;
}
@ -239,8 +235,8 @@ int check_40mhz_5g(struct hostapd_hw_modes *mode,
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *bss = scan_res->res[i];
get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
if (pri_chan == bss_sec_chan &&
sec_chan == bss_pri_chan) {
if (pri_chan->chan == bss_sec_chan &&
sec_chan->chan == bss_pri_chan) {
wpa_printf(MSG_INFO, "Switch own primary and "
"secondary channel due to BSS "
"overlap with " MACSTR,

11
src/common/hw_features_common.h
View file

@ -22,12 +22,13 @@ int hw_get_freq(struct hostapd_hw_modes *mode, int chan);
int hw_get_chan(enum hostapd_hw_mode mode, int freq,
struct hostapd_hw_modes *hw_features, int num_hw_features);
int allowed_ht40_channel_pair(struct hostapd_hw_modes *mode, int pri_chan,
int sec_chan);
int allowed_ht40_channel_pair(enum hostapd_hw_mode mode,
struct hostapd_channel_data *p_chan,
struct hostapd_channel_data *s_chan);
void get_pri_sec_chan(struct wpa_scan_res *bss, int *pri_chan, int *sec_chan);
int check_40mhz_5g(struct hostapd_hw_modes *mode,
struct wpa_scan_results *scan_res, int pri_chan,
int sec_chan);
int check_40mhz_5g(struct wpa_scan_results *scan_res,
struct hostapd_channel_data *pri_chan,
struct hostapd_channel_data *sec_chan);
int check_40mhz_2g4(struct hostapd_hw_modes *mode,
struct wpa_scan_results *scan_res, int pri_chan,
int sec_chan);

3
wpa_supplicant/wpa_supplicant.c
View file

@ -2382,8 +2382,7 @@ void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s,
return;
}
res = check_40mhz_5g(mode, scan_res, pri_chan->chan,
sec_chan->chan);
res = check_40mhz_5g(scan_res, pri_chan, sec_chan);
switch (res) {
case 0:
/* Back to HT20 */