+/* trigger type within common_info of trigger frame */
+#define IEEE80211_TRIGGER_TYPE_MASK 0xf
+#define IEEE80211_TRIGGER_TYPE_BASIC 0x0
+#define IEEE80211_TRIGGER_TYPE_BFRP 0x1
+#define IEEE80211_TRIGGER_TYPE_MU_BAR 0x2
+#define IEEE80211_TRIGGER_TYPE_MU_RTS 0x3
+#define IEEE80211_TRIGGER_TYPE_BSRP 0x4
+#define IEEE80211_TRIGGER_TYPE_GCR_MU_BAR 0x5
+#define IEEE80211_TRIGGER_TYPE_BQRP 0x6
+#define IEEE80211_TRIGGER_TYPE_NFRP 0x7
+