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ap: add support for 5GHz frequencies in AP mode

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This enables IWD to use 5GHz frequencies in AP mode. Currently
6GHz is not supported so we can assume a [General].Channel value
36 or above indicates the 5GHz band.

It should be noted that the system will probably need a regulatory
domain set in order for 5GHz to be allowed in AP mode. This is due
to world roaming (00) restricting any/all 5GHz frequencies. This
can be accomplished by setting main.conf [General].Country=CC to
the country this AP will operate in.
This commit is contained in:
James Prestwood 2022-12-09 11:39:28 -08:00 committed by Denis Kenzior
parent 3cd93505d6
commit c6792a4bcc
1 changed files with 65 additions and 8 deletions
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73
src/ap.c
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@ -70,6 +70,7 @@ struct ap_state {
char ssid[33];
char passphrase[64];
uint8_t psk[32];
enum band_freq band;
uint8_t channel;
uint8_t *authorized_macs;
unsigned int authorized_macs_num;
@ -985,7 +986,7 @@ static uint32_t ap_send_mgmt_frame(struct ap_state *ap,
frame_xchg_cb_t callback,
void *user_data)
{
uint32_t ch_freq = band_channel_to_freq(ap->channel, BAND_FREQ_2_4_GHZ);
uint32_t ch_freq = band_channel_to_freq(ap->channel, ap->band);
uint64_t wdev_id = netdev_get_wdev_id(ap->netdev);
struct iovec iov[2];
@ -2408,7 +2409,7 @@ static struct l_genl_msg *ap_build_cmd_start_ap(struct ap_state *ap)
uint32_t nl_akm = CRYPTO_AKM_PSK;
uint32_t wpa_version = NL80211_WPA_VERSION_2;
uint32_t auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
uint32_t ch_freq = band_channel_to_freq(ap->channel, BAND_FREQ_2_4_GHZ);
uint32_t ch_freq = band_channel_to_freq(ap->channel, ap->band);
uint32_t ch_width = NL80211_CHAN_WIDTH_20;
unsigned int i;
@ -3170,6 +3171,42 @@ static char **ap_ciphers_to_strv(uint16_t ciphers)
return list;
}
static bool ap_validate_band_channel(struct ap_state *ap)
{
struct wiphy *wiphy = netdev_get_wiphy(ap->netdev);
const struct scan_freq_set *supported;
const struct scan_freq_set *disabled;
uint32_t freq;
if (!(wiphy_get_supported_bands(wiphy) & ap->band)) {
l_error("AP hardware does not support band");
return -EINVAL;
}
freq = band_channel_to_freq(ap->channel, ap->band);
if (!freq) {
l_error("AP invalid band (%s) and channel (%u) combination",
(ap->band & BAND_FREQ_5_GHZ) ? "5Ghz" : "2.4GHz",
ap->channel);
return false;
}
supported = wiphy_get_supported_freqs(wiphy);
disabled = wiphy_get_disabled_freqs(wiphy);
if (!scan_freq_set_contains(supported, freq)) {
l_error("AP hardware does not support frequency %u", freq);
return false;
}
if (scan_freq_set_contains(disabled, freq)) {
l_error("AP hardware has frequency %u disabled", freq);
return false;
}
return true;
}
static int ap_load_config(struct ap_state *ap, const struct l_settings *config,
bool *out_cck_rates)
{
@ -3214,17 +3251,31 @@ static int ap_load_config(struct ap_state *ap, const struct l_settings *config,
unsigned int uintval;
if (!l_settings_get_uint(config, "General", "Channel",
&uintval) ||
!band_channel_to_freq(uintval,
BAND_FREQ_2_4_GHZ)) {
&uintval)) {
l_error("AP Channel value unsupported");
return -EINVAL;
}
ap->channel = uintval;
} else
/*
* 6GHz is not supported so we can use only a channel number to
* distinguish between 2.4 and 5GHz.
*/
if (ap->channel >= 36)
ap->band = BAND_FREQ_5_GHZ;
else
ap->band = BAND_FREQ_2_4_GHZ;
} else {
/* TODO: Start a Get Survey to decide the channel */
ap->channel = 6;
ap->band = BAND_FREQ_2_4_GHZ;
}
if (!ap_validate_band_channel(ap)) {
l_error("AP Band and Channel combination invalid");
return -EINVAL;
}
strval = l_settings_get_string(config, "WSC", "DeviceName");
if (strval) {
@ -3290,7 +3341,13 @@ static int ap_load_config(struct ap_state *ap, const struct l_settings *config,
l_strfreev(strvval);
}
if (l_settings_get_value(config, "General", "NoCCKRates")) {
/*
* Since 5GHz won't ever support only CCK rates we can ignore this
* setting on that band.
*/
if (ap->band & BAND_FREQ_5_GHZ)
*out_cck_rates = false;
else if (l_settings_get_value(config, "General", "NoCCKRates")) {
bool boolval;
if (!l_settings_get_bool(config, "General", "NoCCKRates",
@ -4080,7 +4137,7 @@ static bool ap_dbus_property_get_freq(struct l_dbus *dbus,
if (!ap_if->ap || !ap_if->ap->started)
return false;
freq = band_channel_to_freq(ap_if->ap->channel, BAND_FREQ_2_4_GHZ);
freq = band_channel_to_freq(ap_if->ap->channel, ap_if->ap->band);
l_dbus_message_builder_append_basic(builder, 'u', &freq);