[PATCH v2 02/20] nl80211: Explicitly differentiate between 5GHz mode and 6GHz mode

[benjamin at sipsolutions.net]

From: Ilan Peer <ilan.peer at intel.com>

When a device supports both the 5GHz band and the 6GHz band,
these are reported as two separate modes, both with mode set to
HOSTAPD_MODE_IEEE80211A. However, as these are different modes,
each with its own characteristics, e.g., rates, capabilities etc.,
specifically differentiate between them by adding a flag to indicate
whether the mode describes a 6GHz band capabilities or not.

Signed-off-by: Ilan Peer <ilan.peer at intel.com>
Signed-off-by: Benjamin Berg <benjamin.berg at intel.com>
---
 src/ap/hw_features.c              |  8 ++------
 src/drivers/driver.h              |  5 +++++
 src/drivers/driver_nl80211_capa.c | 11 +++++++++--
 wpa_supplicant/wpa_supplicant.c   |  3 +--
 4 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/src/ap/hw_features.c b/src/ap/hw_features.c
index 596f2f020..fd401d78a 100644
--- a/src/ap/hw_features.c
+++ b/src/ap/hw_features.c
@@ -107,9 +107,7 @@ int hostapd_get_hw_features(struct hostapd_iface *iface)
 		 */
 		orig_mode_valid = true;
 		mode = iface->current_mode->mode;
-		is_6ghz = mode == HOSTAPD_MODE_IEEE80211A &&
-			iface->current_mode->num_channels > 0 &&
-			is_6ghz_freq(iface->current_mode->channels[0].freq);
+		is_6ghz = iface->current_mode->is_6ghz;
 		iface->current_mode = NULL;
 	}
 	hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
@@ -1070,9 +1068,7 @@ static bool skip_mode(struct hostapd_iface *iface,
 		return true;
 
 	if (is_6ghz_op_class(iface->conf->op_class) && iface->freq == 0 &&
-	    (mode->mode != HOSTAPD_MODE_IEEE80211A ||
-	     mode->num_channels == 0 ||
-	     !is_6ghz_freq(mode->channels[0].freq)))
+	    !mode->is_6ghz)
 		return true;
 
 	return false;
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index bff7502f1..3dcab8f31 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -246,6 +246,11 @@ struct hostapd_hw_modes {
 	 */
 	enum hostapd_hw_mode mode;
 
+	/**
+	 * is_6ghz - true iff the mode information is for the 6GHz band
+	 */
+	bool is_6ghz;
+
 	/**
 	 * num_channels - Number of entries in the channels array
 	 */
diff --git a/src/drivers/driver_nl80211_capa.c b/src/drivers/driver_nl80211_capa.c
index 59f1414ac..cef23b183 100644
--- a/src/drivers/driver_nl80211_capa.c
+++ b/src/drivers/driver_nl80211_capa.c
@@ -2156,6 +2156,9 @@ wpa_driver_nl80211_postprocess_modes(struct hostapd_hw_modes *modes,
 	for (m = 0; m < *num_modes; m++) {
 		if (!modes[m].num_channels)
 			continue;
+
+		modes[m].is_6ghz = false;
+
 		if (modes[m].channels[0].freq < 2000) {
 			modes[m].num_channels = 0;
 			continue;
@@ -2167,10 +2170,14 @@ wpa_driver_nl80211_postprocess_modes(struct hostapd_hw_modes *modes,
 					break;
 				}
 			}
-		} else if (modes[m].channels[0].freq > 50000)
+		} else if (modes[m].channels[0].freq > 50000) {
 			modes[m].mode = HOSTAPD_MODE_IEEE80211AD;
-		else
+		} else if (is_6ghz_freq(modes[m].channels[0].freq)) {
 			modes[m].mode = HOSTAPD_MODE_IEEE80211A;
+			modes[m].is_6ghz = true;
+		} else {
+			modes[m].mode = HOSTAPD_MODE_IEEE80211A;
+		}
 	}
 
 	/* Remove unsupported bands */
diff --git a/wpa_supplicant/wpa_supplicant.c b/wpa_supplicant/wpa_supplicant.c
index 91a213dac..cd37a20eb 100644
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -9055,8 +9055,7 @@ struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
 		if (modes[i].mode != mode ||
 		    !modes[i].num_channels || !modes[i].channels)
 			continue;
-		if ((!is_6ghz && !is_6ghz_freq(modes[i].channels[0].freq)) ||
-		    (is_6ghz && is_6ghz_freq(modes[i].channels[0].freq)))
+		if (is_6ghz == modes[i].is_6ghz)
 			return &modes[i];
 	}
 
-- 
2.43.2