[NET] ieee80211 subsystem

Contributors:
Host AP contributors
James Ketrenos <jketreno@linux.intel.com>
Francois Romieu <romieu@fr.zoreil.com>
Adrian Bunk <bunk@stusta.de>
Matthew Galgoci <mgalgoci@parcelfarce.linux.th
eplanet.co.uk>

1 files changed, 1206 insertions, 0 deletions

diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
new file mode 100644
index 00000000000..2bda8a17481
--- /dev/null
+++ b/net/ieee80211/ieee80211_rx.c
@@ -0,0 +1,1206 @@
+/*
+ * Original code based Host AP (software wireless LAN access point) driver
+ * for Intersil Prism2/2.5/3 - hostap.o module, common routines
+ *
+ * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
+ * <jkmaline@cc.hut.fi>
+ * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright (c) 2004, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. See README and COPYING for
+ * more details.
+ */
+
+#include <linux/compiler.h>
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/in6.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+#include <asm/uaccess.h>
+#include <linux/ctype.h>
+
+#include <net/ieee80211.h>
+
+static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
+					struct sk_buff *skb,
+					struct ieee80211_rx_stats *rx_stats)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	u16 fc = le16_to_cpu(hdr->frame_ctl);
+
+	skb->dev = ieee->dev;
+	skb->mac.raw = skb->data;
+	skb_pull(skb, ieee80211_get_hdrlen(fc));
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = __constant_htons(ETH_P_80211_RAW);
+	memset(skb->cb, 0, sizeof(skb->cb));
+	netif_rx(skb);
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+static struct ieee80211_frag_entry *
+ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
+			  unsigned int frag, u8 *src, u8 *dst)
+{
+	struct ieee80211_frag_entry *entry;
+	int i;
+
+	for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
+		entry = &ieee->frag_cache[i];
+		if (entry->skb != NULL &&
+		    time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
+			IEEE80211_DEBUG_FRAG(
+				"expiring fragment cache entry "
+				"seq=%u last_frag=%u\n",
+				entry->seq, entry->last_frag);
+			dev_kfree_skb_any(entry->skb);
+			entry->skb = NULL;
+		}
+
+		if (entry->skb != NULL && entry->seq == seq &&
+		    (entry->last_frag + 1 == frag || frag == -1) &&
+		    memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
+		    memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
+			return entry;
+	}
+
+	return NULL;
+}
+
+/* Called only as a tasklet (software IRQ) */
+static struct sk_buff *
+ieee80211_frag_cache_get(struct ieee80211_device *ieee,
+			 struct ieee80211_hdr *hdr)
+{
+	struct sk_buff *skb = NULL;
+	u16 sc;
+	unsigned int frag, seq;
+	struct ieee80211_frag_entry *entry;
+
+	sc = le16_to_cpu(hdr->seq_ctl);
+	frag = WLAN_GET_SEQ_FRAG(sc);
+	seq = WLAN_GET_SEQ_SEQ(sc);
+
+	if (frag == 0) {
+		/* Reserve enough space to fit maximum frame length */
+		skb = dev_alloc_skb(ieee->dev->mtu +
+				    sizeof(struct ieee80211_hdr) +
+				    8 /* LLC */ +
+				    2 /* alignment */ +
+				    8 /* WEP */ + ETH_ALEN /* WDS */);
+		if (skb == NULL)
+			return NULL;
+
+		entry = &ieee->frag_cache[ieee->frag_next_idx];
+		ieee->frag_next_idx++;
+		if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
+			ieee->frag_next_idx = 0;
+
+		if (entry->skb != NULL)
+			dev_kfree_skb_any(entry->skb);
+
+		entry->first_frag_time = jiffies;
+		entry->seq = seq;
+		entry->last_frag = frag;
+		entry->skb = skb;
+		memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
+		memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
+	} else {
+		/* received a fragment of a frame for which the head fragment
+		 * should have already been received */
+		entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
+						  hdr->addr1);
+		if (entry != NULL) {
+			entry->last_frag = frag;
+			skb = entry->skb;
+		}
+	}
+
+	return skb;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
+					   struct ieee80211_hdr *hdr)
+{
+	u16 sc;
+	unsigned int seq;
+	struct ieee80211_frag_entry *entry;
+
+	sc = le16_to_cpu(hdr->seq_ctl);
+	seq = WLAN_GET_SEQ_SEQ(sc);
+
+	entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
+					  hdr->addr1);
+
+	if (entry == NULL) {
+		IEEE80211_DEBUG_FRAG(
+			"could not invalidate fragment cache "
+			"entry (seq=%u)\n", seq);
+		return -1;
+	}
+
+	entry->skb = NULL;
+	return 0;
+}
+
+
+#ifdef NOT_YET
+/* ieee80211_rx_frame_mgtmt
+ *
+ * Responsible for handling management control frames
+ *
+ * Called by ieee80211_rx */
+static inline int
+ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
+			struct ieee80211_rx_stats *rx_stats, u16 type,
+			u16 stype)
+{
+	if (ieee->iw_mode == IW_MODE_MASTER) {
+		printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
+		       ieee->dev->name);
+		return 0;
+/*
+  hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *)
+  skb->data);*/
+	}
+
+	if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
+		if (stype == WLAN_FC_STYPE_BEACON &&
+		    ieee->iw_mode == IW_MODE_MASTER) {
+			struct sk_buff *skb2;
+			/* Process beacon frames also in kernel driver to
+			 * update STA(AP) table statistics */
+			skb2 = skb_clone(skb, GFP_ATOMIC);
+			if (skb2)
+				hostap_rx(skb2->dev, skb2, rx_stats);
+		}
+
+		/* send management frames to the user space daemon for
+		 * processing */
+		ieee->apdevstats.rx_packets++;
+		ieee->apdevstats.rx_bytes += skb->len;
+		prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
+		return 0;
+	}
+
+	    if (ieee->iw_mode == IW_MODE_MASTER) {
+		if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
+			printk(KERN_DEBUG "%s: unknown management frame "
+			       "(type=0x%02x, stype=0x%02x) dropped\n",
+			       skb->dev->name, type, stype);
+			return -1;
+		}
+
+		hostap_rx(skb->dev, skb, rx_stats);
+		return 0;
+	}
+
+	printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
+	       "received in non-Host AP mode\n", skb->dev->name);
+	return -1;
+}
+#endif
+
+
+/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
+/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
+static unsigned char rfc1042_header[] =
+{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
+/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
+static unsigned char bridge_tunnel_header[] =
+{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
+/* No encapsulation header if EtherType < 0x600 (=length) */
+
+/* Called by ieee80211_rx_frame_decrypt */
+static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
+				    struct sk_buff *skb)
+{
+	struct net_device *dev = ieee->dev;
+	u16 fc, ethertype;
+	struct ieee80211_hdr *hdr;
+	u8 *pos;
+
+	if (skb->len < 24)
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	fc = le16_to_cpu(hdr->frame_ctl);
+
+	/* check that the frame is unicast frame to us */
+	if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
+	    IEEE80211_FCTL_TODS &&
+	    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
+	    memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
+		/* ToDS frame with own addr BSSID and DA */
+	} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
+		   IEEE80211_FCTL_FROMDS &&
+		   memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+		/* FromDS frame with own addr as DA */
+	} else
+		return 0;
+
+	if (skb->len < 24 + 8)
+		return 0;
+
+	/* check for port access entity Ethernet type */
+	pos = skb->data + 24;
+	ethertype = (pos[6] << 8) | pos[7];
+	if (ethertype == ETH_P_PAE)
+		return 1;
+
+	return 0;
+}
+
+/* Called only as a tasklet (software IRQ), by ieee80211_rx */
+static inline int
+ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
+			   struct ieee80211_crypt_data *crypt)
+{
+	struct ieee80211_hdr *hdr;
+	int res, hdrlen;
+
+	if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
+
+#ifdef CONFIG_IEEE80211_CRYPT_TKIP
+	if (ieee->tkip_countermeasures &&
+	    strcmp(crypt->ops->name, "TKIP") == 0) {
+		if (net_ratelimit()) {
+			printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
+			       "received packet from " MAC_FMT "\n",
+			       ieee->dev->name, MAC_ARG(hdr->addr2));
+		}
+		return -1;
+	}
+#endif
+
+	atomic_inc(&crypt->refcnt);
+	res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
+	atomic_dec(&crypt->refcnt);
+	if (res < 0) {
+		IEEE80211_DEBUG_DROP(
+			"decryption failed (SA=" MAC_FMT
+			") res=%d\n", MAC_ARG(hdr->addr2), res);
+		if (res == -2)
+			IEEE80211_DEBUG_DROP("Decryption failed ICV "
+					     "mismatch (key %d)\n",
+					     skb->data[hdrlen + 3] >> 6);
+		ieee->ieee_stats.rx_discards_undecryptable++;
+		return -1;
+	}
+
+	return res;
+}
+
+
+/* Called only as a tasklet (software IRQ), by ieee80211_rx */
+static inline int
+ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
+			     int keyidx, struct ieee80211_crypt_data *crypt)
+{
+	struct ieee80211_hdr *hdr;
+	int res, hdrlen;
+
+	if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
+		return 0;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
+
+	atomic_inc(&crypt->refcnt);
+	res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
+	atomic_dec(&crypt->refcnt);
+	if (res < 0) {
+		printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
+		       " (SA=" MAC_FMT " keyidx=%d)\n",
+		       ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
+		return -1;
+	}
+
+	return 0;
+}
+
+
+/* All received frames are sent to this function. @skb contains the frame in
+ * IEEE 802.11 format, i.e., in the format it was sent over air.
+ * This function is called only as a tasklet (software IRQ). */
+int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
+		 struct ieee80211_rx_stats *rx_stats)
+{
+	struct net_device *dev = ieee->dev;
+	struct ieee80211_hdr *hdr;
+	size_t hdrlen;
+	u16 fc, type, stype, sc;
+	struct net_device_stats *stats;
+	unsigned int frag;
+	u8 *payload;
+	u16 ethertype;
+#ifdef NOT_YET
+	struct net_device *wds = NULL;
+	struct sk_buff *skb2 = NULL;
+	struct net_device *wds = NULL;
+	int frame_authorized = 0;
+	int from_assoc_ap = 0;
+	void *sta = NULL;
+#endif
+	u8 dst[ETH_ALEN];
+	u8 src[ETH_ALEN];
+	struct ieee80211_crypt_data *crypt = NULL;
+	int keyidx = 0;
+
+	hdr = (struct ieee80211_hdr *)skb->data;
+	stats = &ieee->stats;
+
+	if (skb->len < 10) {
+		printk(KERN_INFO "%s: SKB length < 10\n",
+		       dev->name);
+		goto rx_dropped;
+	}
+
+	fc = le16_to_cpu(hdr->frame_ctl);
+	type = WLAN_FC_GET_TYPE(fc);
+	stype = WLAN_FC_GET_STYPE(fc);
+	sc = le16_to_cpu(hdr->seq_ctl);
+	frag = WLAN_GET_SEQ_FRAG(sc);
+	hdrlen = ieee80211_get_hdrlen(fc);
+
+#ifdef NOT_YET
+#if WIRELESS_EXT > 15
+	/* Put this code here so that we avoid duplicating it in all
+	 * Rx paths. - Jean II */
+#ifdef IW_WIRELESS_SPY		/* defined in iw_handler.h */
+	/* If spy monitoring on */
+	if (iface->spy_data.spy_number > 0) {
+		struct iw_quality wstats;
+		wstats.level = rx_stats->signal;
+		wstats.noise = rx_stats->noise;
+		wstats.updated = 6;	/* No qual value */
+		/* Update spy records */
+		wireless_spy_update(dev, hdr->addr2, &wstats);
+	}
+#endif /* IW_WIRELESS_SPY */
+#endif /* WIRELESS_EXT > 15 */
+	hostap_update_rx_stats(local->ap, hdr, rx_stats);
+#endif
+
+#if WIRELESS_EXT > 15
+	if (ieee->iw_mode == IW_MODE_MONITOR) {
+		ieee80211_monitor_rx(ieee, skb, rx_stats);
+		stats->rx_packets++;
+		stats->rx_bytes += skb->len;
+		return 1;
+	}
+#endif
+
+	if (ieee->host_decrypt) {
+		int idx = 0;
+		if (skb->len >= hdrlen + 3)
+			idx = skb->data[hdrlen + 3] >> 6;
+		crypt = ieee->crypt[idx];
+#ifdef NOT_YET
+		sta = NULL;
+
+		/* Use station specific key to override default keys if the
+		 * receiver address is a unicast address ("individual RA"). If
+		 * bcrx_sta_key parameter is set, station specific key is used
+		 * even with broad/multicast targets (this is against IEEE
+		 * 802.11, but makes it easier to use different keys with
+		 * stations that do not support WEP key mapping). */
+
+		if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
+			(void) hostap_handle_sta_crypto(local, hdr, &crypt,
+							&sta);
+#endif
+
+		/* allow NULL decrypt to indicate an station specific override
+		 * for default encryption */
+		if (crypt && (crypt->ops == NULL ||
+			      crypt->ops->decrypt_mpdu == NULL))
+			crypt = NULL;
+
+		if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
+			/* This seems to be triggered by some (multicast?)
+			 * frames from other than current BSS, so just drop the
+			 * frames silently instead of filling system log with
+			 * these reports. */
+			IEEE80211_DEBUG_DROP("Decryption failed (not set)"
+					     " (SA=" MAC_FMT ")\n",
+					     MAC_ARG(hdr->addr2));
+			ieee->ieee_stats.rx_discards_undecryptable++;
+			goto rx_dropped;
+		}
+	}
+
+#ifdef NOT_YET
+	if (type != WLAN_FC_TYPE_DATA) {
+		if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
+		    fc & IEEE80211_FCTL_WEP && ieee->host_decrypt &&
+		    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0)
+		{
+			printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
+			       "from " MAC_FMT "\n", dev->name,
+			       MAC_ARG(hdr->addr2));
+			/* TODO: could inform hostapd about this so that it
+			 * could send auth failure report */
+			goto rx_dropped;
+		}
+
+		if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
+			goto rx_dropped;
+		else
+			goto rx_exit;
+	}
+#endif
+
+	/* Data frame - extract src/dst addresses */
+	if (skb->len < IEEE80211_DATA_HDR3_LEN)
+		goto rx_dropped;
+
+	switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
+	case IEEE80211_FCTL_FROMDS:
+		memcpy(dst, hdr->addr1, ETH_ALEN);
+		memcpy(src, hdr->addr3, ETH_ALEN);
+		break;
+	case IEEE80211_FCTL_TODS:
+		memcpy(dst, hdr->addr3, ETH_ALEN);
+		memcpy(src, hdr->addr2, ETH_ALEN);
+		break;
+	case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
+		if (skb->len < IEEE80211_DATA_HDR4_LEN)
+			goto rx_dropped;
+		memcpy(dst, hdr->addr3, ETH_ALEN);
+		memcpy(src, hdr->addr4, ETH_ALEN);
+		break;
+	case 0:
+		memcpy(dst, hdr->addr1, ETH_ALEN);
+		memcpy(src, hdr->addr2, ETH_ALEN);
+		break;
+	}
+
+#ifdef NOT_YET
+	if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
+		goto rx_dropped;
+	if (wds) {
+		skb->dev = dev = wds;
+		stats = hostap_get_stats(dev);
+	}
+
+	if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
+	    (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
+	    ieee->stadev &&
+	    memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
+		/* Frame from BSSID of the AP for which we are a client */
+		skb->dev = dev = ieee->stadev;
+		stats = hostap_get_stats(dev);
+		from_assoc_ap = 1;
+	}
+#endif
+
+	dev->last_rx = jiffies;
+
+#ifdef NOT_YET
+	if ((ieee->iw_mode == IW_MODE_MASTER ||
+	     ieee->iw_mode == IW_MODE_REPEAT) &&
+	    !from_assoc_ap) {
+		switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
+					     wds != NULL)) {
+		case AP_RX_CONTINUE_NOT_AUTHORIZED:
+			frame_authorized = 0;
+			break;
+		case AP_RX_CONTINUE:
+			frame_authorized = 1;
+			break;
+		case AP_RX_DROP:
+			goto rx_dropped;
+		case AP_RX_EXIT:
+			goto rx_exit;
+		}
+	}
+#endif
+
+	/* Nullfunc frames may have PS-bit set, so they must be passed to
+	 * hostap_handle_sta_rx() before being dropped here. */
+	if (stype != IEEE80211_STYPE_DATA &&
+	    stype != IEEE80211_STYPE_DATA_CFACK &&
+	    stype != IEEE80211_STYPE_DATA_CFPOLL &&
+	    stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
+		if (stype != IEEE80211_STYPE_NULLFUNC)
+			IEEE80211_DEBUG_DROP(
+				"RX: dropped data frame "
+				"with no data (type=0x%02x, "
+				"subtype=0x%02x, len=%d)\n",
+				type, stype, skb->len);
+		goto rx_dropped;
+	}
+
+	/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
+
+	if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
+	    (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
+		goto rx_dropped;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+
+	/* skb: hdr + (possibly fragmented) plaintext payload */
+	// PR: FIXME: hostap has additional conditions in the "if" below:
+	// ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
+	if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
+		int flen;
+		struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
+		IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
+
+		if (!frag_skb) {
+			IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
+					"Rx cannot get skb from fragment "
+					"cache (morefrag=%d seq=%u frag=%u)\n",
+					(fc & IEEE80211_FCTL_MOREFRAGS) != 0,
+					WLAN_GET_SEQ_SEQ(sc), frag);
+			goto rx_dropped;
+		}
+
+		flen = skb->len;
+		if (frag != 0)
+			flen -= hdrlen;
+
+		if (frag_skb->tail + flen > frag_skb->end) {
+			printk(KERN_WARNING "%s: host decrypted and "
+			       "reassembled frame did not fit skb\n",
+			       dev->name);
+			ieee80211_frag_cache_invalidate(ieee, hdr);
+			goto rx_dropped;
+		}
+
+		if (frag == 0) {
+			/* copy first fragment (including full headers) into
+			 * beginning of the fragment cache skb */
+			memcpy(skb_put(frag_skb, flen), skb->data, flen);
+		} else {
+			/* append frame payload to the end of the fragment
+			 * cache skb */
+			memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
+			       flen);
+		}
+		dev_kfree_skb_any(skb);
+		skb = NULL;
+
+		if (fc & IEEE80211_FCTL_MOREFRAGS) {
+			/* more fragments expected - leave the skb in fragment
+			 * cache for now; it will be delivered to upper layers
+			 * after all fragments have been received */
+			goto rx_exit;
+		}
+
+		/* 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;
+		ieee80211_frag_cache_invalidate(ieee, hdr);
+	}
+
+	/* skb: hdr + (possible reassembled) full MSDU payload; possibly still
+	 * encrypted/authenticated */
+	if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
+	    ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
+		goto rx_dropped;
+
+	hdr = (struct ieee80211_hdr *) skb->data;
+	if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
+		if (/*ieee->ieee802_1x &&*/
+		    ieee80211_is_eapol_frame(ieee, skb)) {
+#ifdef CONFIG_IEEE80211_DEBUG
+			/* pass unencrypted EAPOL frames even if encryption is
+			 * configured */
+			struct eapol *eap = (struct eapol *)(skb->data +
+				24);
+			IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
+						eap_get_type(eap->type));
+#endif
+		} else {
+			IEEE80211_DEBUG_DROP(
+				"encryption configured, but RX "
+				"frame not encrypted (SA=" MAC_FMT ")\n",
+				MAC_ARG(hdr->addr2));
+			goto rx_dropped;
+		}
+	}
+
+#ifdef CONFIG_IEEE80211_DEBUG
+	if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
+	    ieee80211_is_eapol_frame(ieee, skb)) {
+			struct eapol *eap = (struct eapol *)(skb->data +
+				24);
+			IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
+						eap_get_type(eap->type));
+	}
+#endif
+
+	if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
+	    !ieee80211_is_eapol_frame(ieee, skb)) {
+		IEEE80211_DEBUG_DROP(
+			"dropped unencrypted RX data "
+			"frame from " MAC_FMT
+			" (drop_unencrypted=1)\n",
+			MAC_ARG(hdr->addr2));
+		goto rx_dropped;
+	}
+
+	/* skb: hdr + (possible reassembled) full plaintext payload */
+
+	payload = skb->data + hdrlen;
+	ethertype = (payload[6] << 8) | payload[7];
+
+#ifdef NOT_YET
+	/* If IEEE 802.1X is used, check whether the port is authorized to send
+	 * the received frame. */
+	if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
+		if (ethertype == ETH_P_PAE) {
+			printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
+			       dev->name);
+			if (ieee->hostapd && ieee->apdev) {
+				/* Send IEEE 802.1X frames to the user
+				 * space daemon for processing */
+				prism2_rx_80211(ieee->apdev, skb, rx_stats,
+						PRISM2_RX_MGMT);
+				ieee->apdevstats.rx_packets++;
+				ieee->apdevstats.rx_bytes += skb->len;
+				goto rx_exit;
+			}
+		} else if (!frame_authorized) {
+			printk(KERN_DEBUG "%s: dropped frame from "
+			       "unauthorized port (IEEE 802.1X): "
+			       "ethertype=0x%04x\n",
+			       dev->name, ethertype);
+			goto rx_dropped;
+		}
+	}
+#endif
+
+	/* convert hdr + possible LLC headers into Ethernet header */
+	if (skb->len - hdrlen >= 8 &&
+	    ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
+	      ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
+	     memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
+		/* remove RFC1042 or Bridge-Tunnel encapsulation and
+		 * replace EtherType */
+		skb_pull(skb, hdrlen + SNAP_SIZE);
+		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+	} else {
+		u16 len;
+		/* Leave Ethernet header part of hdr and full payload */
+		skb_pull(skb, hdrlen);
+		len = htons(skb->len);
+		memcpy(skb_push(skb, 2), &len, 2);
+		memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
+		memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
+	}
+
+#ifdef NOT_YET
+	if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
+		    IEEE80211_FCTL_TODS) &&
+	    skb->len >= ETH_HLEN + ETH_ALEN) {
+		/* Non-standard frame: get addr4 from its bogus location after
+		 * the payload */
+		memcpy(skb->data + ETH_ALEN,
+		       skb->data + skb->len - ETH_ALEN, ETH_ALEN);
+		skb_trim(skb, skb->len - ETH_ALEN);
+	}
+#endif
+
+	stats->rx_packets++;
+	stats->rx_bytes += skb->len;
+
+#ifdef NOT_YET
+	if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
+	    ieee->ap->bridge_packets) {
+		if (dst[0] & 0x01) {
+			/* copy multicast frame both to the higher layers and
+			 * to the wireless media */
+			ieee->ap->bridged_multicast++;
+			skb2 = skb_clone(skb, GFP_ATOMIC);
+			if (skb2 == NULL)
+				printk(KERN_DEBUG "%s: skb_clone failed for "
+				       "multicast frame\n", dev->name);
+		} else if (hostap_is_sta_assoc(ieee->ap, dst)) {
+			/* send frame directly to the associated STA using
+			 * wireless media and not passing to higher layers */
+			ieee->ap->bridged_unicast++;
+			skb2 = skb;
+			skb = NULL;
+		}
+	}
+
+	if (skb2 != NULL) {
+		/* send to wireless media */
+		skb2->protocol = __constant_htons(ETH_P_802_3);
+		skb2->mac.raw = skb2->nh.raw = skb2->data;
+		/* skb2->nh.raw = skb2->data + ETH_HLEN; */
+		skb2->dev = dev;
+		dev_queue_xmit(skb2);
+	}
+
+#endif
+
+	if (skb) {
+		skb->protocol = eth_type_trans(skb, dev);
+		memset(skb->cb, 0, sizeof(skb->cb));
+		skb->dev = dev;
+		skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
+		netif_rx(skb);
+	}
+
+ rx_exit:
+#ifdef NOT_YET
+	if (sta)
+		hostap_handle_sta_release(sta);
+#endif
+	return 1;
+
+ rx_dropped:
+	stats->rx_dropped++;
+
+	/* Returning 0 indicates to caller that we have not handled the SKB--
+	 * so it is still allocated and can be used again by underlying
+	 * hardware as a DMA target */
+	return 0;
+}
+
+#define MGMT_FRAME_FIXED_PART_LENGTH		0x24
+
+static inline int ieee80211_is_ofdm_rate(u8 rate)
+{
+	switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
+	case IEEE80211_OFDM_RATE_6MB:
+	case IEEE80211_OFDM_RATE_9MB:
+	case IEEE80211_OFDM_RATE_12MB:
+	case IEEE80211_OFDM_RATE_18MB:
+	case IEEE80211_OFDM_RATE_24MB:
+	case IEEE80211_OFDM_RATE_36MB:
+	case IEEE80211_OFDM_RATE_48MB:
+	case IEEE80211_OFDM_RATE_54MB:
+		return 1;
+	}
+        return 0;
+}
+
+
+static inline int ieee80211_network_init(
+	struct ieee80211_device *ieee,
+	struct ieee80211_probe_response *beacon,
+	struct ieee80211_network *network,
+	struct ieee80211_rx_stats *stats)
+{
+#ifdef CONFIG_IEEE80211_DEBUG
+	char rates_str[64];
+	char *p;
+#endif
+	struct ieee80211_info_element *info_element;
+ 	u16 left;
+	u8 i;
+
+	/* Pull out fixed field data */
+	memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
+	network->capability = beacon->capability;
+	network->last_scanned = jiffies;
+	network->time_stamp[0] = beacon->time_stamp[0];
+	network->time_stamp[1] = beacon->time_stamp[1];
+	network->beacon_interval = beacon->beacon_interval;
+	/* Where to pull this? beacon->listen_interval;*/
+	network->listen_interval = 0x0A;
+	network->rates_len = network->rates_ex_len = 0;
+	network->last_associate = 0;
+	network->ssid_len = 0;
+	network->flags = 0;
+	network->atim_window = 0;
+
+	if (stats->freq == IEEE80211_52GHZ_BAND) {
+		/* for A band (No DS info) */
+		network->channel = stats->received_channel;
+	} else
+		network->flags |= NETWORK_HAS_CCK;
+
+ 	network->wpa_ie_len = 0;
+ 	network->rsn_ie_len = 0;
+
+ 	info_element = &beacon->info_element;
+	left = stats->len - ((void *)info_element - (void *)beacon);
+	while (left >= sizeof(struct ieee80211_info_element_hdr)) {
+		if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
+			IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
+					     info_element->len + sizeof(struct ieee80211_info_element),
+					     left);
+			return 1;
+               	}
+
+		switch (info_element->id) {
+		case MFIE_TYPE_SSID:
+			if (ieee80211_is_empty_essid(info_element->data,
+						     info_element->len)) {
+				network->flags |= NETWORK_EMPTY_ESSID;
+				break;
+			}
+
+			network->ssid_len = min(info_element->len,
+						(u8)IW_ESSID_MAX_SIZE);
+			memcpy(network->ssid, info_element->data, network->ssid_len);
+        		if (network->ssid_len < IW_ESSID_MAX_SIZE)
+                		memset(network->ssid + network->ssid_len, 0,
+				       IW_ESSID_MAX_SIZE - network->ssid_len);
+
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
+					     network->ssid, network->ssid_len);
+			break;
+
+		case MFIE_TYPE_RATES:
+#ifdef CONFIG_IEEE80211_DEBUG
+			p = rates_str;
+#endif
+			network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
+			for (i = 0; i < network->rates_len; i++) {
+				network->rates[i] = info_element->data[i];
+#ifdef CONFIG_IEEE80211_DEBUG
+				p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
+#endif
+				if (ieee80211_is_ofdm_rate(info_element->data[i])) {
+					network->flags |= NETWORK_HAS_OFDM;
+					if (info_element->data[i] &
+					    IEEE80211_BASIC_RATE_MASK)
+						network->flags &=
+							~NETWORK_HAS_CCK;
+				}
+			}
+
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
+					     rates_str, network->rates_len);
+			break;
+
+		case MFIE_TYPE_RATES_EX:
+#ifdef CONFIG_IEEE80211_DEBUG
+			p = rates_str;
+#endif
+			network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
+			for (i = 0; i < network->rates_ex_len; i++) {
+				network->rates_ex[i] = info_element->data[i];
+#ifdef CONFIG_IEEE80211_DEBUG
+				p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
+#endif
+				if (ieee80211_is_ofdm_rate(info_element->data[i])) {
+					network->flags |= NETWORK_HAS_OFDM;
+					if (info_element->data[i] &
+					    IEEE80211_BASIC_RATE_MASK)
+						network->flags &=
+							~NETWORK_HAS_CCK;
+				}
+			}
+
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
+					     rates_str, network->rates_ex_len);
+			break;
+
+		case MFIE_TYPE_DS_SET:
+  			IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
+					     info_element->data[0]);
+			if (stats->freq == IEEE80211_24GHZ_BAND)
+				network->channel = info_element->data[0];
+			break;
+
+	 	case MFIE_TYPE_FH_SET:
+  			IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_CF_SET:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_TIM:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_TIM: ignored\n");
+			break;
+
+		case MFIE_TYPE_IBSS_SET:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_CHALLENGE:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
+			break;
+
+		case MFIE_TYPE_GENERIC:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
+					     info_element->len);
+			if (info_element->len >= 4  &&
+			    info_element->data[0] == 0x00 &&
+			    info_element->data[1] == 0x50 &&
+			    info_element->data[2] == 0xf2 &&
+			    info_element->data[3] == 0x01) {
+				network->wpa_ie_len = min(info_element->len + 2,
+							 MAX_WPA_IE_LEN);
+				memcpy(network->wpa_ie, info_element,
+				       network->wpa_ie_len);
+			}
+			break;
+
+		case MFIE_TYPE_RSN:
+			IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
+					     info_element->len);
+			network->rsn_ie_len = min(info_element->len + 2,
+						 MAX_WPA_IE_LEN);
+			memcpy(network->rsn_ie, info_element,
+			       network->rsn_ie_len);
+			break;
+
+		default:
+			IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
+					     info_element->id);
+                        break;
+  		}
+
+		left -= sizeof(struct ieee80211_info_element_hdr) +
+			info_element->len;
+		info_element = (struct ieee80211_info_element *)
+                	&info_element->data[info_element->len];
+  	}
+
+	network->mode = 0;
+	if (stats->freq == IEEE80211_52GHZ_BAND)
+		network->mode = IEEE_A;
+	else {
+		if (network->flags & NETWORK_HAS_OFDM)
+			network->mode |= IEEE_G;
+		if (network->flags & NETWORK_HAS_CCK)
+			network->mode |= IEEE_B;
+	}
+
+	if (network->mode == 0) {
+		IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
+				     "network.\n",
+				     escape_essid(network->ssid,
+						  network->ssid_len),
+				     MAC_ARG(network->bssid));
+		return 1;
+	}
+
+	if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
+		network->flags |= NETWORK_EMPTY_ESSID;
+
+	memcpy(&network->stats, stats, sizeof(network->stats));
+
+	return 0;
+}
+
+static inline int is_same_network(struct ieee80211_network *src,
+				  struct ieee80211_network *dst)
+{
+	/* A network is only a duplicate if the channel, BSSID, and ESSID
+	 * all match.  We treat all <hidden> with the same BSSID and channel
+	 * as one network */
+	return ((src->ssid_len == dst->ssid_len) &&
+		(src->channel == dst->channel) &&
+		!memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
+		!memcmp(src->ssid, dst->ssid, src->ssid_len));
+}
+
+static inline void update_network(struct ieee80211_network *dst,
+				  struct ieee80211_network *src)
+{
+	memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
+	dst->capability = src->capability;
+	memcpy(dst->rates, src->rates, src->rates_len);
+	dst->rates_len = src->rates_len;
+	memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
+	dst->rates_ex_len = src->rates_ex_len;
+
+	dst->mode = src->mode;
+	dst->flags = src->flags;
+	dst->time_stamp[0] = src->time_stamp[0];
+	dst->time_stamp[1] = src->time_stamp[1];
+
+	dst->beacon_interval = src->beacon_interval;
+	dst->listen_interval = src->listen_interval;
+	dst->atim_window = src->atim_window;
+
+	memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
+	dst->wpa_ie_len = src->wpa_ie_len;
+	memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
+	dst->rsn_ie_len = src->rsn_ie_len;
+
+	dst->last_scanned = jiffies;
+	/* dst->last_associate is not overwritten */
+}
+
+static inline void ieee80211_process_probe_response(
+	struct ieee80211_device *ieee,
+	struct ieee80211_probe_response *beacon,
+	struct ieee80211_rx_stats *stats)
+{
+	struct ieee80211_network network;
+	struct ieee80211_network *target;
+	struct ieee80211_network *oldest = NULL;
+#ifdef CONFIG_IEEE80211_DEBUG
+	struct ieee80211_info_element *info_element = &beacon->info_element;
+#endif
+	unsigned long flags;
+
+	IEEE80211_DEBUG_SCAN(
+		"'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
+		escape_essid(info_element->data, info_element->len),
+		MAC_ARG(beacon->header.addr3),
+		(beacon->capability & (1<<0xf)) ? '1' : '0',
+		(beacon->capability & (1<<0xe)) ? '1' : '0',
+		(beacon->capability & (1<<0xd)) ? '1' : '0',
+		(beacon->capability & (1<<0xc)) ? '1' : '0',
+		(beacon->capability & (1<<0xb)) ? '1' : '0',
+		(beacon->capability & (1<<0xa)) ? '1' : '0',
+		(beacon->capability & (1<<0x9)) ? '1' : '0',
+		(beacon->capability & (1<<0x8)) ? '1' : '0',
+		(beacon->capability & (1<<0x7)) ? '1' : '0',
+		(beacon->capability & (1<<0x6)) ? '1' : '0',
+		(beacon->capability & (1<<0x5)) ? '1' : '0',
+		(beacon->capability & (1<<0x4)) ? '1' : '0',
+		(beacon->capability & (1<<0x3)) ? '1' : '0',
+		(beacon->capability & (1<<0x2)) ? '1' : '0',
+		(beacon->capability & (1<<0x1)) ? '1' : '0',
+		(beacon->capability & (1<<0x0)) ? '1' : '0');
+
+	if (ieee80211_network_init(ieee, beacon, &network, stats)) {
+		IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
+				     escape_essid(info_element->data,
+						  info_element->len),
+				     MAC_ARG(beacon->header.addr3),
+				     WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
+				     IEEE80211_STYPE_PROBE_RESP ?
+				     "PROBE RESPONSE" : "BEACON");
+		return;
+	}
+
+	/* The network parsed correctly -- so now we scan our known networks
+	 * to see if we can find it in our list.
+	 *
+	 * NOTE:  This search is definitely not optimized.  Once its doing
+	 *        the "right thing" we'll optimize it for efficiency if
+	 *        necessary */
+
+	/* Search for this entry in the list and update it if it is
+	 * already there. */
+
+	spin_lock_irqsave(&ieee->lock, flags);
+
+	list_for_each_entry(target, &ieee->network_list, list) {
+		if (is_same_network(target, &network))
+			break;
+
+		if ((oldest == NULL) ||
+		    (target->last_scanned < oldest->last_scanned))
+			oldest = target;
+	}
+
+	/* If we didn't find a match, then get a new network slot to initialize
+	 * with this beacon's information */
+	if (&target->list == &ieee->network_list) {
+		if (list_empty(&ieee->network_free_list)) {
+			/* If there are no more slots, expire the oldest */
+			list_del(&oldest->list);
+			target = oldest;
+			IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
+					     "network list.\n",
+					     escape_essid(target->ssid,
+							  target->ssid_len),
+					     MAC_ARG(target->bssid));
+		} else {
+			/* Otherwise just pull from the free list */
+			target = list_entry(ieee->network_free_list.next,
+					    struct ieee80211_network, list);
+			list_del(ieee->network_free_list.next);
+		}
+
+
+#ifdef CONFIG_IEEE80211_DEBUG
+		IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
+				     escape_essid(network.ssid,
+						  network.ssid_len),
+				     MAC_ARG(network.bssid),
+				     WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
+				     IEEE80211_STYPE_PROBE_RESP ?
+				     "PROBE RESPONSE" : "BEACON");
+#endif
+		memcpy(target, &network, sizeof(*target));
+		list_add_tail(&target->list, &ieee->network_list);
+	} else {
+		IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
+				     escape_essid(target->ssid,
+						  target->ssid_len),
+				     MAC_ARG(target->bssid),
+				     WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
+				     IEEE80211_STYPE_PROBE_RESP ?
+				     "PROBE RESPONSE" : "BEACON");
+		update_network(target, &network);
+	}
+
+	spin_unlock_irqrestore(&ieee->lock, flags);
+}
+
+void ieee80211_rx_mgt(struct ieee80211_device *ieee,
+		      struct ieee80211_hdr *header,
+		      struct ieee80211_rx_stats *stats)
+{
+	switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
+	case IEEE80211_STYPE_ASSOC_RESP:
+		IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
+				     WLAN_FC_GET_STYPE(header->frame_ctl));
+		break;
+
+	case IEEE80211_STYPE_REASSOC_RESP:
+		IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
+				     WLAN_FC_GET_STYPE(header->frame_ctl));
+		break;
+
+	case IEEE80211_STYPE_PROBE_RESP:
+		IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
+				     WLAN_FC_GET_STYPE(header->frame_ctl));
+		IEEE80211_DEBUG_SCAN("Probe response\n");
+		ieee80211_process_probe_response(
+			ieee, (struct ieee80211_probe_response *)header, stats);
+		break;
+
+	case IEEE80211_STYPE_BEACON:
+		IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
+				     WLAN_FC_GET_STYPE(header->frame_ctl));
+		IEEE80211_DEBUG_SCAN("Beacon\n");
+		ieee80211_process_probe_response(
+			ieee, (struct ieee80211_probe_response *)header, stats);
+		break;
+
+	default:
+		IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
+				     WLAN_FC_GET_STYPE(header->frame_ctl));
+		IEEE80211_WARNING("%s: Unknown management packet: %d\n",
+				  ieee->dev->name,
+				  WLAN_FC_GET_STYPE(header->frame_ctl));
+		break;
+	}
+}
+
+
+EXPORT_SYMBOL(ieee80211_rx_mgt);
+EXPORT_SYMBOL(ieee80211_rx);