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ap: generate chandef for starting AP

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To include HT support a chandef needs to be created for whatever
frequency is being used. This allows IWD to provide a secondary
channel to the kernel in the case of 40MHz operation. Now the AP
will generate a chandef when starting based on the channel set
in the user profile (or default).

If HT is not supported the chandef width is set to 20MHz no-HT,
otherwise band_freq_to_ht_chandef is used.
This commit is contained in:
James Prestwood 2022-12-28 14:32:30 -08:00 committed by Denis Kenzior
parent e9ea7b45c9
commit 65236f7231
1 changed files with 34 additions and 4 deletions
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38
src/ap.c
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@ -72,6 +72,7 @@ struct ap_state {
uint8_t psk[32];
enum band_freq band;
uint8_t channel;
struct band_chandef chandef;
uint8_t *authorized_macs;
unsigned int authorized_macs_num;
char wsc_name[33];
@ -2469,8 +2470,6 @@ 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, ap->band);
uint32_t ch_width = NL80211_CHAN_WIDTH_20;
unsigned int i;
static const uint8_t bcast_addr[6] = {
@ -2518,8 +2517,13 @@ static struct l_genl_msg *ap_build_cmd_start_ap(struct ap_state *ap)
l_genl_msg_append_attr(cmd, NL80211_ATTR_WPA_VERSIONS, 4, &wpa_version);
l_genl_msg_append_attr(cmd, NL80211_ATTR_AKM_SUITES, 4, &nl_akm);
l_genl_msg_append_attr(cmd, NL80211_ATTR_AUTH_TYPE, 4, &auth_type);
l_genl_msg_append_attr(cmd, NL80211_ATTR_WIPHY_FREQ, 4, &ch_freq);
l_genl_msg_append_attr(cmd, NL80211_ATTR_CHANNEL_WIDTH, 4, &ch_width);
l_genl_msg_append_attr(cmd, NL80211_ATTR_WIPHY_FREQ, 4,
&ap->chandef.frequency);
l_genl_msg_append_attr(cmd, NL80211_ATTR_CHANNEL_WIDTH, 4,
&ap->chandef.channel_width);
if (ap->chandef.center1_frequency)
l_genl_msg_append_attr(cmd, NL80211_ATTR_CENTER_FREQ1, 4,
&ap->chandef.center1_frequency);
if (wiphy_supports_probe_resp_offload(wiphy)) {
uint8_t probe_resp[head_len + tail_len];
@ -3255,6 +3259,32 @@ static bool ap_validate_band_channel(struct ap_state *ap)
l_error("AP frequency %u disabled or unsupported", freq);
return false;
}
if (ap->supports_ht) {
if (band_freq_to_ht_chandef(freq, attr, &ap->chandef) < 0) {
/*
* This is unlikely ever to fail since there are no
* 20Mhz restrictions, but just in case fall back to
* non-HT.
*/
ap->supports_ht = false;
l_warn("AP could not find HT chandef for frequency %u"
" using 20Mhz no-HT", freq);
goto no_ht;
}
} else {
no_ht:
ap->chandef.frequency = freq;
ap->chandef.channel_width = BAND_CHANDEF_WIDTH_20NOHT;
}
l_debug("AP using frequency %u and channel width %s",
ap->chandef.frequency,
band_chandef_width_to_string(
ap->chandef.channel_width));
return true;
}