AP: Publish only HE capabilities and operation IEs on 6 GHz band

When operating on the 6 GHz band, add 6 GHz Operation Information inside
the HE Operation element and don't publish HT/VHT IEs.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>

- Replace HOSTAPD_MODE_IEEE80211AX mode checks with is_6ghz_op_class()

Signed-off-by: Vamsi Krishna <vamsin@codeaurora.org>

src/ap/beacon.c

@@ -499,7 +499,8 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 #endif /* CONFIG_FST */
 
 #ifdef CONFIG_IEEE80211AC
-	if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
+	if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac &&
+	    !is_6ghz_op_class(hapd->iconf->op_class)) {
 		pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
 		pos = hostapd_eid_vht_operation(hapd, pos);
 		pos = hostapd_eid_txpower_envelope(hapd, pos);

src/ap/ieee802_11.c

@@ -3657,7 +3657,8 @@ static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
 #endif /* CONFIG_IEEE80211N */
 
 #ifdef CONFIG_IEEE80211AC
-	if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
+	if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac &&
+	    !is_6ghz_op_class(hapd->iconf->op_class)) {
 		u32 nsts = 0, sta_nsts;
 
 		if (sta && hapd->conf->use_sta_nsts && sta->vht_capabilities) {

src/ap/ieee802_11_he.c

@@ -11,6 +11,7 @@
 
 #include "utils/common.h"
 #include "common/ieee802_11_defs.h"
+#include "common/ieee802_11_common.h"
 #include "hostapd.h"
 #include "ap_config.h"
 #include "beacon.h"
@@ -170,6 +171,9 @@ u8 * hostapd_eid_he_operation(struct hostapd_data *hapd, u8 *eid)
 	if (!hapd->iface->current_mode)
 		return eid;
 
+	if (is_6ghz_op_class(hapd->iconf->op_class))
+		oper_size += 5;
+
 	*pos++ = WLAN_EID_EXTENSION;
 	*pos++ = 1 + oper_size;
 	*pos++ = WLAN_EID_EXT_HE_OPERATION;
@@ -198,9 +202,26 @@ u8 * hostapd_eid_he_operation(struct hostapd_data *hapd, u8 *eid)
 
 	/* TODO: conditional MaxBSSID Indicator subfield */
 
-	oper->he_oper_params = host_to_le32(params);
+	pos += 6; /* skip the fixed part */
+
+	if (is_6ghz_op_class(hapd->iconf->op_class)) {
+		u8 seg0 = hostapd_get_oper_centr_freq_seg0_idx(hapd->iconf);
+
+		if (!seg0)
+			seg0 = hapd->iconf->channel;
 
-	pos += oper_size;
+		params |= HE_OPERATION_6GHZ_OPER_INFO;
+		*pos++ = hapd->iconf->channel; /* Primary Channel */
+		*pos++ = center_idx_to_bw_6ghz(seg0); /* Control: Channel Width
+						       */
+		/* Channel Center Freq Seg0/Seg0 */
+		*pos++ = seg0;
+		*pos++ = hostapd_get_oper_centr_freq_seg1_idx(hapd->iconf);
+		/* Minimum Rate */
+		*pos++ = 6; /* TODO: what should be set here? */
+	}
+
+	oper->he_oper_params = host_to_le32(params);
 
 	return pos;
 }

src/ap/ieee802_11_ht.c

@@ -27,7 +27,7 @@ u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
 	u8 *pos = eid;
 
 	if (!hapd->iconf->ieee80211n || !hapd->iface->current_mode ||
-	    hapd->conf->disable_11n)
+	    hapd->conf->disable_11n || is_6ghz_op_class(hapd->iconf->op_class))
 		return eid;
 
 	*pos++ = WLAN_EID_HT_CAP;
@@ -84,7 +84,8 @@ u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
 	struct ieee80211_ht_operation *oper;
 	u8 *pos = eid;
 
-	if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
+	if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n ||
+	    is_6ghz_op_class(hapd->iconf->op_class))
 		return eid;
 
 	*pos++ = WLAN_EID_HT_OPERATION;
@@ -113,7 +114,8 @@ u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
 	u8 sec_ch;
 
 	if (!hapd->cs_freq_params.channel ||
-	    !hapd->cs_freq_params.sec_channel_offset)
+	    !hapd->cs_freq_params.sec_channel_offset ||
+	    is_6ghz_op_class(hapd->iconf->op_class))
 		return eid;
 
 	if (hapd->cs_freq_params.sec_channel_offset == -1)

src/ap/ieee802_11_vht.c

@@ -26,7 +26,7 @@ u8 * hostapd_eid_vht_capabilities(struct hostapd_data *hapd, u8 *eid, u32 nsts)
 	struct hostapd_hw_modes *mode = hapd->iface->current_mode;
 	u8 *pos = eid;
 
-	if (!mode)
+	if (!mode || is_6ghz_op_class(hapd->iconf->op_class))
 		return eid;
 
 	if (mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->conf->vendor_vht &&
@@ -76,6 +76,9 @@ u8 * hostapd_eid_vht_operation(struct hostapd_data *hapd, u8 *eid)
 	struct ieee80211_vht_operation *oper;
 	u8 *pos = eid;
 
+	if (is_6ghz_op_class(hapd->iconf->op_class))
+		return eid;
+
 	*pos++ = WLAN_EID_VHT_OPERATION;
 	*pos++ = sizeof(*oper);
 

src/common/ieee802_11_common.c

@@ -1958,6 +1958,12 @@ int is_6ghz_freq(int freq)
 }
 
 
+int is_6ghz_op_class(u8 op_class)
+{
+	return op_class >= 131 && op_class <= 135;
+}
+
+
 int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep,
 				    size_t nei_rep_len)
 {

src/common/ieee802_11_common.h

@@ -222,6 +222,7 @@ const struct oper_class_map * get_oper_class(const char *country, u8 op_class);
 int oper_class_bw_to_int(const struct oper_class_map *map);
 int center_idx_to_bw_6ghz(u8 idx);
 int is_6ghz_freq(int freq);
+int is_6ghz_op_class(u8 op_class);
 
 int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep,
 				    size_t nei_rep_len);

src/common/ieee802_11_defs.h

@@ -2185,6 +2185,10 @@ struct ieee80211_spatial_reuse {
 						BIT(10) | BIT(11) | \
 						BIT(12) | BIT(13)))
 #define HE_OPERATION_RTS_THRESHOLD_OFFSET	4
+#define HE_OPERATION_VHT_OPER_INFO		((u32) BIT(14))
+#define HE_OPERATION_COHOSTED_BSS		((u32) BIT(15))
+#define HE_OPERATION_ER_SU_DISABLE		((u32) BIT(16))
+#define HE_OPERATION_6GHZ_OPER_INFO		((u32) BIT(17))
 #define HE_OPERATION_BSS_COLOR_MASK		((u32) (BIT(24) | BIT(25) | \
 							BIT(26) | BIT(27) | \
 							BIT(28) | BIT(29)))