diff --git a/include/net/ieee80211.h b/include/net/ieee80211.h
index dfc5d65..ebe7e41 100644
--- a/include/net/ieee80211.h
+++ b/include/net/ieee80211.h
@@ -33,33 +33,13 @@
    represents the 2304 bytes of real data, plus a possible 8 bytes of
    WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */
 
-#define IEEE80211_HLEN			30
-#define IEEE80211_FRAME_LEN		(IEEE80211_DATA_LEN + IEEE80211_HLEN)
-
-struct ieee80211_hdr {
-	__le16 frame_ctl;
-	__le16 duration_id;
-	u8 addr1[ETH_ALEN];
-	u8 addr2[ETH_ALEN];
-	u8 addr3[ETH_ALEN];
-	__le16 seq_ctl;
-	u8 addr4[ETH_ALEN];
-} __attribute__ ((packed));
-
-struct ieee80211_hdr_3addr {
-	__le16 frame_ctl;
-	__le16 duration_id;
-	u8 addr1[ETH_ALEN];
-	u8 addr2[ETH_ALEN];
-	u8 addr3[ETH_ALEN];
-	__le16 seq_ctl;
-} __attribute__ ((packed));
-
 #define IEEE80211_1ADDR_LEN 10
 #define IEEE80211_2ADDR_LEN 16
 #define IEEE80211_3ADDR_LEN 24
 #define IEEE80211_4ADDR_LEN 30
 #define IEEE80211_FCS_LEN    4
+#define IEEE80211_HLEN			(IEEE80211_4ADDR_LEN)
+#define IEEE80211_FRAME_LEN		(IEEE80211_DATA_LEN + IEEE80211_HLEN)
 
 #define MIN_FRAG_THRESHOLD     256U
 #define	MAX_FRAG_THRESHOLD     2346U
@@ -515,6 +495,51 @@
 	MFIE_TYPE_GENERIC = 221,
 };
 
+/* Minimal header; can be used for passing 802.11 frames with sufficient
+ * information to determine what type of underlying data type is actually
+ * stored in the data. */
+struct ieee80211_hdr {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 payload[0];
+} __attribute__ ((packed));
+
+struct ieee80211_hdr_1addr {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 addr1[ETH_ALEN];
+	u8 payload[0];
+} __attribute__ ((packed));
+
+struct ieee80211_hdr_2addr {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 addr1[ETH_ALEN];
+	u8 addr2[ETH_ALEN];
+	u8 payload[0];
+} __attribute__ ((packed));
+
+struct ieee80211_hdr_3addr {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 addr1[ETH_ALEN];
+	u8 addr2[ETH_ALEN];
+	u8 addr3[ETH_ALEN];
+	u16 seq_ctl;
+	u8 payload[0];
+} __attribute__ ((packed));
+
+struct ieee80211_hdr_4addr {
+	u16 frame_ctl;
+	u16 duration_id;
+	u8 addr1[ETH_ALEN];
+	u8 addr2[ETH_ALEN];
+	u8 addr3[ETH_ALEN];
+	u16 seq_ctl;
+	u8 addr4[ETH_ALEN];
+	u8 payload[0];
+} __attribute__ ((packed));
+
 struct ieee80211_info_element {
 	u8 id;
 	u8 len;
@@ -538,7 +563,7 @@
 	u16 status;
 */
 
-struct ieee80211_authentication {
+struct ieee80211_auth {
 	struct ieee80211_hdr_3addr header;
 	__le16 algorithm;
 	__le16 transaction;
@@ -546,6 +571,17 @@
 	struct ieee80211_info_element info_element[0];
 } __attribute__ ((packed));
 
+struct ieee80211_disassoc {
+	struct ieee80211_hdr_3addr header;
+	u16 reason_code;
+	struct ieee80211_info_element info_element[0];
+} __attribute__ ((packed));
+
+struct ieee80211_probe_request {
+	struct ieee80211_hdr_3addr header;
+	struct ieee80211_info_element info_element[0];
+} __attribute__ ((packed));
+
 struct ieee80211_probe_response {
 	struct ieee80211_hdr_3addr header;
 	u32 time_stamp[2];
@@ -554,14 +590,25 @@
 	struct ieee80211_info_element info_element[0];
 } __attribute__ ((packed));
 
-struct ieee80211_assoc_request_frame {
+/* Alias beacon for probe_response */
+#define ieee80211_beacon ieee80211_probe_response
+
+struct ieee80211_assoc_request {
+	struct ieee80211_hdr_3addr header;
+	u16 capability;
+	u16 listen_interval;
+	struct ieee80211_info_element info_element[0];
+} __attribute__ ((packed));
+
+struct ieee80211_reassoc_request {
+	struct ieee80211_hdr_3addr header;
 	__le16 capability;
 	__le16 listen_interval;
 	u8 current_ap[ETH_ALEN];
 	struct ieee80211_info_element info_element[0];
 } __attribute__ ((packed));
 
-struct ieee80211_assoc_response_frame {
+struct ieee80211_assoc_response {
 	struct ieee80211_hdr_3addr header;
 	__le16 capability;
 	__le16 status;
@@ -572,7 +619,8 @@
 struct ieee80211_txb {
 	u8 nr_frags;
 	u8 encrypted;
-	u16 reserved;
+	u8 rts_included;
+	u8 reserved;
 	u16 frag_size;
 	u16 payload_size;
 	struct sk_buff *fragments[0];
@@ -803,6 +851,21 @@
 	return hdrlen;
 }
 
+extern inline u8 *ieee80211_get_payload(struct ieee80211_hdr *hdr)
+{
+	switch (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl))) {
+	case IEEE80211_1ADDR_LEN:
+		return ((struct ieee80211_hdr_1addr *)hdr)->payload;
+	case IEEE80211_2ADDR_LEN:
+		return ((struct ieee80211_hdr_2addr *)hdr)->payload;
+	case IEEE80211_3ADDR_LEN:
+		return ((struct ieee80211_hdr_3addr *)hdr)->payload;
+	case IEEE80211_4ADDR_LEN:
+		return ((struct ieee80211_hdr_4addr *)hdr)->payload;
+	}
+
+}
+
 /* ieee80211.c */
 extern void free_ieee80211(struct net_device *dev);
 extern struct net_device *alloc_ieee80211(int sizeof_priv);
@@ -817,7 +880,7 @@
 extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 			struct ieee80211_rx_stats *rx_stats);
 extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
-			     struct ieee80211_hdr *header,
+			     struct ieee80211_hdr_4addr *header,
 			     struct ieee80211_rx_stats *stats);
 
 /* ieee80211_wx.c */
diff --git a/net/ieee80211/ieee80211_crypt_ccmp.c b/net/ieee80211/ieee80211_crypt_ccmp.c
index 1e6644b..d3b5cde 100644
--- a/net/ieee80211/ieee80211_crypt_ccmp.c
+++ b/net/ieee80211/ieee80211_crypt_ccmp.c
@@ -119,7 +119,7 @@
 }
 
 static void ccmp_init_blocks(struct crypto_tfm *tfm,
-			     struct ieee80211_hdr *hdr,
+			     struct ieee80211_hdr_4addr *hdr,
 			     u8 * pn, size_t dlen, u8 * b0, u8 * auth, u8 * s0)
 {
 	u8 *pos, qc = 0;
@@ -196,7 +196,7 @@
 	struct ieee80211_ccmp_data *key = priv;
 	int data_len, i, blocks, last, len;
 	u8 *pos, *mic;
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_4addr *hdr;
 	u8 *b0 = key->tx_b0;
 	u8 *b = key->tx_b;
 	u8 *e = key->tx_e;
@@ -229,7 +229,7 @@
 	*pos++ = key->tx_pn[1];
 	*pos++ = key->tx_pn[0];
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 	ccmp_init_blocks(key->tfm, hdr, key->tx_pn, data_len, b0, b, s0);
 
 	blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN;
@@ -258,7 +258,7 @@
 {
 	struct ieee80211_ccmp_data *key = priv;
 	u8 keyidx, *pos;
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_4addr *hdr;
 	u8 *b0 = key->rx_b0;
 	u8 *b = key->rx_b;
 	u8 *a = key->rx_a;
@@ -272,7 +272,7 @@
 		return -1;
 	}
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 	pos = skb->data + hdr_len;
 	keyidx = pos[3];
 	if (!(keyidx & (1 << 5))) {
diff --git a/net/ieee80211/ieee80211_crypt_tkip.c b/net/ieee80211/ieee80211_crypt_tkip.c
index 0c495f0..f091aac 100644
--- a/net/ieee80211/ieee80211_crypt_tkip.c
+++ b/net/ieee80211/ieee80211_crypt_tkip.c
@@ -265,11 +265,11 @@
 	struct ieee80211_tkip_data *tkey = priv;
 	int len;
 	u8 rc4key[16], *pos, *icv;
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_4addr *hdr;
 	u32 crc;
 	struct scatterlist sg;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 
 	if (tkey->ieee->tkip_countermeasures) {
 		if (net_ratelimit()) {
@@ -334,13 +334,13 @@
 	u8 keyidx, *pos;
 	u32 iv32;
 	u16 iv16;
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_4addr *hdr;
 	u8 icv[4];
 	u32 crc;
 	struct scatterlist sg;
 	int plen;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 
 	if (tkey->ieee->tkip_countermeasures) {
 		if (net_ratelimit()) {
@@ -466,9 +466,9 @@
 
 static void michael_mic_hdr(struct sk_buff *skb, u8 * hdr)
 {
-	struct ieee80211_hdr *hdr11;
+	struct ieee80211_hdr_4addr *hdr11;
 
-	hdr11 = (struct ieee80211_hdr *)skb->data;
+	hdr11 = (struct ieee80211_hdr_4addr *)skb->data;
 	switch (le16_to_cpu(hdr11->frame_ctl) &
 		(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 	case IEEE80211_FCTL_TODS:
@@ -517,7 +517,8 @@
 
 #if WIRELESS_EXT >= 18
 static void ieee80211_michael_mic_failure(struct net_device *dev,
-					  struct ieee80211_hdr *hdr, int keyidx)
+					  struct ieee80211_hdr_4addr *hdr,
+					  int keyidx)
 {
 	union iwreq_data wrqu;
 	struct iw_michaelmicfailure ev;
@@ -537,7 +538,8 @@
 }
 #elif WIRELESS_EXT >= 15
 static void ieee80211_michael_mic_failure(struct net_device *dev,
-					  struct ieee80211_hdr *hdr, int keyidx)
+					  struct ieee80211_hdr_4addr *hdr,
+					  int keyidx)
 {
 	union iwreq_data wrqu;
 	char buf[128];
@@ -551,9 +553,8 @@
 	wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 }
 #else				/* WIRELESS_EXT >= 15 */
-static inline void ieee80211_michael_mic_failure(struct net_device *dev,
-						 struct ieee80211_hdr *hdr,
-						 int keyidx)
+static inline void ieee80211_michael_mic_failure(struct net_device *dev, struct ieee80211_hdr_4addr
+						 *hdr, int keyidx)
 {
 }
 #endif				/* WIRELESS_EXT >= 15 */
@@ -572,8 +573,8 @@
 			skb->data + hdr_len, skb->len - 8 - hdr_len, mic))
 		return -1;
 	if (memcmp(mic, skb->data + skb->len - 8, 8) != 0) {
-		struct ieee80211_hdr *hdr;
-		hdr = (struct ieee80211_hdr *)skb->data;
+		struct ieee80211_hdr_4addr *hdr;
+		hdr = (struct ieee80211_hdr_4addr *)skb->data;
 		printk(KERN_DEBUG "%s: Michael MIC verification failed for "
 		       "MSDU from " MAC_FMT " keyidx=%d\n",
 		       skb->dev ? skb->dev->name : "N/A", MAC_ARG(hdr->addr2),
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index 9a125d4..71d14c7 100644
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -87,7 +87,7 @@
 
 /* Called only as a tasklet (software IRQ) */
 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
-						struct ieee80211_hdr *hdr)
+						struct ieee80211_hdr_4addr *hdr)
 {
 	struct sk_buff *skb = NULL;
 	u16 sc;
@@ -101,7 +101,7 @@
 	if (frag == 0) {
 		/* Reserve enough space to fit maximum frame length */
 		skb = dev_alloc_skb(ieee->dev->mtu +
-				    sizeof(struct ieee80211_hdr) +
+				    sizeof(struct ieee80211_hdr_4addr) +
 				    8 /* LLC */  +
 				    2 /* alignment */  +
 				    8 /* WEP */  + ETH_ALEN /* WDS */ );
@@ -138,7 +138,7 @@
 
 /* Called only as a tasklet (software IRQ) */
 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
-					   struct ieee80211_hdr *hdr)
+					   struct ieee80211_hdr_4addr *hdr)
 {
 	u16 sc;
 	unsigned int seq;
@@ -176,7 +176,7 @@
 		       ieee->dev->name);
 		return 0;
 /*
-  hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *)
+  hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
   skb->data);*/
 	}
 
@@ -232,13 +232,13 @@
 {
 	struct net_device *dev = ieee->dev;
 	u16 fc, ethertype;
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_3addr *hdr;
 	u8 *pos;
 
 	if (skb->len < 24)
 		return 0;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_3addr *)skb->data;
 	fc = le16_to_cpu(hdr->frame_ctl);
 
 	/* check that the frame is unicast frame to us */
@@ -271,13 +271,13 @@
 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 			   struct ieee80211_crypt_data *crypt)
 {
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_3addr *hdr;
 	int res, hdrlen;
 
 	if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 		return 0;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_3addr *)skb->data;
 	hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 
 	atomic_inc(&crypt->refcnt);
@@ -303,13 +303,13 @@
 				struct sk_buff *skb, int keyidx,
 				struct ieee80211_crypt_data *crypt)
 {
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_3addr *hdr;
 	int res, hdrlen;
 
 	if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 		return 0;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_3addr *)skb->data;
 	hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 
 	atomic_inc(&crypt->refcnt);
@@ -332,7 +332,7 @@
 		 struct ieee80211_rx_stats *rx_stats)
 {
 	struct net_device *dev = ieee->dev;
-	struct ieee80211_hdr *hdr;
+	struct ieee80211_hdr_4addr *hdr;
 	size_t hdrlen;
 	u16 fc, type, stype, sc;
 	struct net_device_stats *stats;
@@ -352,7 +352,7 @@
 	struct ieee80211_crypt_data *crypt = NULL;
 	int keyidx = 0;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 	stats = &ieee->stats;
 
 	if (skb->len < 10) {
@@ -552,7 +552,7 @@
 	    (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 		goto rx_dropped;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 
 	/* skb: hdr + (possibly fragmented) plaintext payload */
 	// PR: FIXME: hostap has additional conditions in the "if" below:
@@ -606,7 +606,7 @@
 		/* this was the last fragment and the frame will be
 		 * delivered, so remove skb from fragment cache */
 		skb = frag_skb;
-		hdr = (struct ieee80211_hdr *)skb->data;
+		hdr = (struct ieee80211_hdr_4addr *)skb->data;
 		ieee80211_frag_cache_invalidate(ieee, hdr);
 	}
 
@@ -616,7 +616,7 @@
 	    ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 		goto rx_dropped;
 
-	hdr = (struct ieee80211_hdr *)skb->data;
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
 	if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 		if (		/*ieee->ieee802_1x && */
 			   ieee80211_is_eapol_frame(ieee, skb)) {
@@ -1148,7 +1148,7 @@
 }
 
 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
-		      struct ieee80211_hdr *header,
+		      struct ieee80211_hdr_4addr *header,
 		      struct ieee80211_rx_stats *stats)
 {
 	switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c
index 785e76f..29770cf 100644
--- a/net/ieee80211/ieee80211_tx.c
+++ b/net/ieee80211/ieee80211_tx.c
@@ -227,14 +227,14 @@
 {
 	struct ieee80211_device *ieee = netdev_priv(dev);
 	struct ieee80211_txb *txb = NULL;
-	struct ieee80211_hdr *frag_hdr;
+	struct ieee80211_hdr_3addr *frag_hdr;
 	int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
 	unsigned long flags;
 	struct net_device_stats *stats = &ieee->stats;
 	int ether_type, encrypt, host_encrypt;
 	int bytes, fc, hdr_len;
 	struct sk_buff *skb_frag;
-	struct ieee80211_hdr header = {	/* Ensure zero initialized */
+	struct ieee80211_hdr_3addr header = {	/* Ensure zero initialized */
 		.duration_id = 0,
 		.seq_ctl = 0
 	};
@@ -352,7 +352,8 @@
 		if (host_encrypt)
 			skb_reserve(skb_frag, crypt->ops->extra_prefix_len);
 
-		frag_hdr = (struct ieee80211_hdr *)skb_put(skb_frag, hdr_len);
+		frag_hdr =
+		    (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len);
 		memcpy(frag_hdr, &header, hdr_len);
 
 		/* If this is not the last fragment, then add the MOREFRAGS