[PATCH 1/2] hostapd: add VHT PHY selector if VHT is required

[Johannes Berg]

From: Johannes Berg <johannes.berg at intel.com>

If VHT is required, add the VHT PHY selector to
the (extended) supported rates IE.

Signed-hostap: Johannes Berg <johannes.berg at intel.com>
---
 src/ap/ieee802_11.c          | 28 +++++++++++++++++++++++-----
 src/common/ieee802_11_defs.h |  1 +
 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c
index 8d5268e..e6a9ec5 100644
--- a/src/ap/ieee802_11.c
+++ b/src/ap/ieee802_11.c
@@ -49,6 +49,8 @@ u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
 	num = hapd->iface->num_rates;
 	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
 		num++;
+	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
+		num++;
 	if (num > 8) {
 		/* rest of the rates are encoded in Extended supported
 		 * rates element */
@@ -66,9 +68,15 @@ u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
 		pos++;
 	}
 
-	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
-	    hapd->iface->num_rates < 8)
+	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
+		count++;
 		*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
+	}
+
+	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
+		count++;
+		*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
+	}
 
 	return pos;
 }
@@ -85,6 +93,8 @@ u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
 	num = hapd->iface->num_rates;
 	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
 		num++;
+	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
+		num++;
 	if (num <= 8)
 		return eid;
 	num -= 8;
@@ -103,9 +113,17 @@ u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
 		pos++;
 	}
 
-	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
-	    hapd->iface->num_rates >= 8)
-		*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
+	if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
+		count++;
+		if (count > 8)
+			*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
+	}
+
+	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
+		count++;
+		if (count > 8)
+			*pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
+	}
 
 	return pos;
 }
diff --git a/src/common/ieee802_11_defs.h b/src/common/ieee802_11_defs.h
index ee8578f..07c8580 100644
--- a/src/common/ieee802_11_defs.h
+++ b/src/common/ieee802_11_defs.h
@@ -671,6 +671,7 @@ struct ieee80211_vht_operation {
 #define HT_INFO_STBC_PARAM_PCO_ACTIVE			((u16) BIT(10))
 #define HT_INFO_STBC_PARAM_PCO_PHASE			((u16) BIT(11))
 
+#define BSS_MEMBERSHIP_SELECTOR_VHT_PHY 126
 #define BSS_MEMBERSHIP_SELECTOR_HT_PHY 127
 
 /* VHT Defines */
-- 
1.8.0