--- embedaddon/iftop/ether.h	2012/02/21 16:57:34	1.1
+++ embedaddon/iftop/ether.h	2016/10/18 14:04:50	1.1.1.2
@@ -12,11 +12,22 @@ struct	ether_header {
 	u_int8_t	ether_dhost[ETHER_ADDR_LEN];
 	u_int8_t	ether_shost[ETHER_ADDR_LEN];
 	u_int16_t	ether_type;
-};
+} __attribute__((packed));
 
+
 struct vlan_8021q_header {
 	u_int16_t	priority_cfi_vid;
 	u_int16_t	ether_type;
 };
+
+/*
+ * http://www.gsp.com/cgi-bin/man.cgi?section=9&topic=ieee80211_radiotap
+ */
+struct radiotap_header {
+        u_int8_t        it_version;     /* set to 0 */
+        u_int8_t        it_pad;
+        u_int16_t       it_len;         /* entire length */
+        u_int32_t       it_present;     /* fields present */
+} __attribute__((packed));
 
 #endif