+/* For IEEE80211_RADIOTAP_TIMESTAMP */
+#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MASK 0x000F
+#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_MS 0x0000
+#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US 0x0001
+#define IEEE80211_RADIOTAP_TIMESTAMP_UNIT_NS 0x0003
+#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_MASK 0x00F0
+#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_BEGIN_MDPU 0x0000
+#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_MPDU 0x0010
+#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_EO_PPDU 0x0020
+#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ 0x0030
+#define IEEE80211_RADIOTAP_TIMESTAMP_SPOS_UNKNOWN 0x00F0
+
+#define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_64BIT 0x00
+#define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_32BIT 0x01
+#define IEEE80211_RADIOTAP_TIMESTAMP_FLAG_ACCURACY 0x02
+