net/ieee80211 -> drivers/net/ipw2x00/libipw_* rename

The old ieee80211 code only remains as a support library for the ipw2100
and ipw2200 drivers.  So, move the code and rename it appropriately to
reflects it's true purpose and status.

Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1799 insertions, 0 deletions

diff --git a/drivers/net/wireless/ipw2x00/libipw_rx.c b/drivers/net/wireless/ipw2x00/libipw_rx.c
new file mode 100644
index 000000000000..9c67dfae4320
--- /dev/null
+++ b/drivers/net/wireless/ipw2x00/libipw_rx.c
@@ -0,0 +1,1799 @@
+/*
+ * 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
+ * <j@w1.fi>
+ * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2004-2005, 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/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/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+#include <asm/uaccess.h>
+#include <linux/ctype.h>
+
+#include <net/lib80211.h>
+#include <net/ieee80211.h>
+
+static 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_control);
+
+	skb->dev = ieee->dev;
+	skb_reset_mac_header(skb);
+	skb_pull(skb, ieee80211_get_hdrlen(fc));
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = 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) &&
+		    !compare_ether_addr(entry->src_addr, src) &&
+		    !compare_ether_addr(entry->dst_addr, dst))
+			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_4addr *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_4addr) +
+				    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_4addr *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 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_4addr *)
+  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_3addr *hdr;
+	u8 *pos;
+
+	if (skb->len < 24)
+		return 0;
+
+	hdr = (struct ieee80211_hdr_3addr *)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 &&
+	    !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
+	    !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
+		/* ToDS frame with own addr BSSID and DA */
+	} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
+		   IEEE80211_FCTL_FROMDS &&
+		   !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
+		/* 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 int
+ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
+			   struct lib80211_crypt_data *crypt)
+{
+	struct ieee80211_hdr_3addr *hdr;
+	int res, hdrlen;
+
+	if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
+		return 0;
+
+	hdr = (struct ieee80211_hdr_3addr *)skb->data;
+	hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
+
+	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=%pM) res=%d\n",
+				     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 int
+ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
+				struct sk_buff *skb, int keyidx,
+				struct lib80211_crypt_data *crypt)
+{
+	struct ieee80211_hdr_3addr *hdr;
+	int res, hdrlen;
+
+	if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
+		return 0;
+
+	hdr = (struct ieee80211_hdr_3addr *)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=%pM keyidx=%d)\n", ieee->dev->name, 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_4addr *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 lib80211_crypt_data *crypt = NULL;
+	int keyidx = 0;
+	int can_be_decrypted = 0;
+
+	hdr = (struct ieee80211_hdr_4addr *)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);
+
+	if (skb->len < hdrlen) {
+		printk(KERN_INFO "%s: invalid SKB length %d\n",
+			dev->name, skb->len);
+		goto rx_dropped;
+	}
+
+	/* Put this code here so that we avoid duplicating it in all
+	 * Rx paths. - Jean II */
+#ifdef CONFIG_WIRELESS_EXT
+#ifdef IW_WIRELESS_SPY		/* defined in iw_handler.h */
+	/* If spy monitoring on */
+	if (ieee->spy_data.spy_number > 0) {
+		struct iw_quality wstats;
+
+		wstats.updated = 0;
+		if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
+			wstats.level = rx_stats->signal;
+			wstats.updated |= IW_QUAL_LEVEL_UPDATED;
+		} else
+			wstats.updated |= IW_QUAL_LEVEL_INVALID;
+
+		if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
+			wstats.noise = rx_stats->noise;
+			wstats.updated |= IW_QUAL_NOISE_UPDATED;
+		} else
+			wstats.updated |= IW_QUAL_NOISE_INVALID;
+
+		if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
+			wstats.qual = rx_stats->signal;
+			wstats.updated |= IW_QUAL_QUAL_UPDATED;
+		} else
+			wstats.updated |= IW_QUAL_QUAL_INVALID;
+
+		/* Update spy records */
+		wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
+	}
+#endif				/* IW_WIRELESS_SPY */
+#endif				/* CONFIG_WIRELESS_EXT */
+
+#ifdef NOT_YET
+	hostap_update_rx_stats(local->ap, hdr, rx_stats);
+#endif
+
+	if (ieee->iw_mode == IW_MODE_MONITOR) {
+		stats->rx_packets++;
+		stats->rx_bytes += skb->len;
+		ieee80211_monitor_rx(ieee, skb, rx_stats);
+		return 1;
+	}
+
+	can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
+			    is_broadcast_ether_addr(hdr->addr2)) ?
+	    ieee->host_mc_decrypt : ieee->host_decrypt;
+
+	if (can_be_decrypted) {
+		if (skb->len >= hdrlen + 3) {
+			/* Top two-bits of byte 3 are the key index */
+			keyidx = skb->data[hdrlen + 3] >> 6;
+		}
+
+		/* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
+		 * is only allowed 2-bits of storage, no value of keyidx can
+		 * be provided via above code that would result in keyidx
+		 * being out of range */
+		crypt = ieee->crypt_info.crypt[keyidx];
+
+#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_PROTECTED)) {
+			/* 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=%pM)\n", 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_PROTECTED && ieee->host_decrypt &&
+		    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
+			printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
+			       "from %pM\n", dev->name, 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
+	/* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
+	if (sc == ieee->prev_seq_ctl)
+		goto rx_dropped;
+	else
+		ieee->prev_seq_ctl = sc;
+
+	/* Data frame - extract src/dst addresses */
+	if (skb->len < IEEE80211_3ADDR_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_4ADDR_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
+	    && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
+		/* 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
+
+#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. */
+
+	stype &= ~IEEE80211_STYPE_QOS_DATA;
+
+	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 ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
+	    (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
+		goto rx_dropped;
+
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
+
+	/* skb: hdr + (possibly fragmented) plaintext payload */
+	// PR: FIXME: hostap has additional conditions in the "if" below:
+	// ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
+	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 */
+			skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
+		} else {
+			/* append frame payload to the end of the fragment
+			 * cache skb */
+			skb_copy_from_linear_data_offset(skb, hdrlen,
+				      skb_put(frag_skb, flen), 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_4addr *)skb->data;
+		ieee80211_frag_cache_invalidate(ieee, hdr);
+	}
+
+	/* skb: hdr + (possible reassembled) full MSDU payload; possibly still
+	 * encrypted/authenticated */
+	if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
+	    ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
+		goto rx_dropped;
+
+	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)) {
+			/* pass unencrypted EAPOL frames even if encryption is
+			 * configured */
+		} else {
+			IEEE80211_DEBUG_DROP("encryption configured, but RX "
+					     "frame not encrypted (SA=%pM)\n",
+					     hdr->addr2);
+			goto rx_dropped;
+		}
+	}
+
+	if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
+	    !ieee80211_is_eapol_frame(ieee, skb)) {
+		IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
+				     "frame from %pM (drop_unencrypted=1)\n",
+				     hdr->addr2);
+		goto rx_dropped;
+	}
+
+	/* If the frame was decrypted in hardware, we may need to strip off
+	 * any security data (IV, ICV, etc) that was left behind */
+	if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
+	    ieee->host_strip_iv_icv) {
+		int trimlen = 0;
+
+		/* Top two-bits of byte 3 are the key index */
+		if (skb->len >= hdrlen + 3)
+			keyidx = skb->data[hdrlen + 3] >> 6;
+
+		/* To strip off any security data which appears before the
+		 * payload, we simply increase hdrlen (as the header gets
+		 * chopped off immediately below). For the security data which
+		 * appears after the payload, we use skb_trim. */
+
+		switch (ieee->sec.encode_alg[keyidx]) {
+		case SEC_ALG_WEP:
+			/* 4 byte IV */
+			hdrlen += 4;
+			/* 4 byte ICV */
+			trimlen = 4;
+			break;
+		case SEC_ALG_TKIP:
+			/* 4 byte IV, 4 byte ExtIV */
+			hdrlen += 8;
+			/* 8 byte MIC, 4 byte ICV */
+			trimlen = 12;
+			break;
+		case SEC_ALG_CCMP:
+			/* 8 byte CCMP header */
+			hdrlen += 8;
+			/* 8 byte MIC */
+			trimlen = 8;
+			break;
+		}
+
+		if (skb->len < trimlen)
+			goto rx_dropped;
+
+		__skb_trim(skb, skb->len - trimlen);
+
+		if (skb->len < hdrlen)
+			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 {
+		__be16 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 */
+		skb_copy_to_linear_data_offset(skb, 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->dev = dev;
+		skb2->protocol = htons(ETH_P_802_3);
+		skb_reset_mac_header(skb2);
+		skb_reset_network_header(skb2);
+		/* skb2->network_header += ETH_HLEN; */
+		dev_queue_xmit(skb2);
+	}
+#endif
+
+	if (skb) {
+		skb->protocol = eth_type_trans(skb, dev);
+		memset(skb->cb, 0, sizeof(skb->cb));
+		skb->ip_summed = CHECKSUM_NONE;	/* 802.11 crc not sufficient */
+		if (netif_rx(skb) == NET_RX_DROP) {
+			/* netif_rx always succeeds, but it might drop
+			 * the packet.  If it drops the packet, we log that
+			 * in our stats. */
+			IEEE80211_DEBUG_DROP
+			    ("RX: netif_rx dropped the packet\n");
+			stats->rx_dropped++;
+		}
+	}
+
+      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;
+}
+
+/* Filter out unrelated packets, call ieee80211_rx[_mgt]
+ * This function takes over the skb, it should not be used again after calling
+ * this function. */
+void ieee80211_rx_any(struct ieee80211_device *ieee,
+		     struct sk_buff *skb, struct ieee80211_rx_stats *stats)
+{
+	struct ieee80211_hdr_4addr *hdr;
+	int is_packet_for_us;
+	u16 fc;
+
+	if (ieee->iw_mode == IW_MODE_MONITOR) {
+		if (!ieee80211_rx(ieee, skb, stats))
+			dev_kfree_skb_irq(skb);
+		return;
+	}
+
+	if (skb->len < sizeof(struct ieee80211_hdr))
+		goto drop_free;
+
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
+	fc = le16_to_cpu(hdr->frame_ctl);
+
+	if ((fc & IEEE80211_FCTL_VERS) != 0)
+		goto drop_free;
+
+	switch (fc & IEEE80211_FCTL_FTYPE) {
+	case IEEE80211_FTYPE_MGMT:
+		if (skb->len < sizeof(struct ieee80211_hdr_3addr))
+			goto drop_free;
+		ieee80211_rx_mgt(ieee, hdr, stats);
+		dev_kfree_skb_irq(skb);
+		return;
+	case IEEE80211_FTYPE_DATA:
+		break;
+	case IEEE80211_FTYPE_CTL:
+		return;
+	default:
+		return;
+	}
+
+	is_packet_for_us = 0;
+	switch (ieee->iw_mode) {
+	case IW_MODE_ADHOC:
+		/* our BSS and not from/to DS */
+		if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
+		if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
+			/* promisc: get all */
+			if (ieee->dev->flags & IFF_PROMISC)
+				is_packet_for_us = 1;
+			/* to us */
+			else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
+				is_packet_for_us = 1;
+			/* mcast */
+			else if (is_multicast_ether_addr(hdr->addr1))
+				is_packet_for_us = 1;
+		}
+		break;
+	case IW_MODE_INFRA:
+		/* our BSS (== from our AP) and from DS */
+		if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
+		if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
+			/* promisc: get all */
+			if (ieee->dev->flags & IFF_PROMISC)
+				is_packet_for_us = 1;
+			/* to us */
+			else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
+				is_packet_for_us = 1;
+			/* mcast */
+			else if (is_multicast_ether_addr(hdr->addr1)) {
+				/* not our own packet bcasted from AP */
+				if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
+					is_packet_for_us = 1;
+			}
+		}
+		break;
+	default:
+		/* ? */
+		break;
+	}
+
+	if (is_packet_for_us)
+		if (!ieee80211_rx(ieee, skb, stats))
+			dev_kfree_skb_irq(skb);
+	return;
+
+drop_free:
+	dev_kfree_skb_irq(skb);
+	ieee->stats.rx_dropped++;
+	return;
+}
+
+#define MGMT_FRAME_FIXED_PART_LENGTH		0x24
+
+static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
+
+/*
+* Make ther structure we read from the beacon packet has
+* the right values
+*/
+static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
+				     *info_element, int sub_type)
+{
+
+	if (info_element->qui_subtype != sub_type)
+		return -1;
+	if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
+		return -1;
+	if (info_element->qui_type != QOS_OUI_TYPE)
+		return -1;
+	if (info_element->version != QOS_VERSION_1)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Parse a QoS parameter element
+ */
+static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
+					    *element_param, struct ieee80211_info_element
+					    *info_element)
+{
+	int ret = 0;
+	u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
+
+	if ((info_element == NULL) || (element_param == NULL))
+		return -1;
+
+	if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
+		memcpy(element_param->info_element.qui, info_element->data,
+		       info_element->len);
+		element_param->info_element.elementID = info_element->id;
+		element_param->info_element.length = info_element->len;
+	} else
+		ret = -1;
+	if (ret == 0)
+		ret = ieee80211_verify_qos_info(&element_param->info_element,
+						QOS_OUI_PARAM_SUB_TYPE);
+	return ret;
+}
+
+/*
+ * Parse a QoS information element
+ */
+static int ieee80211_read_qos_info_element(struct
+					   ieee80211_qos_information_element
+					   *element_info, struct ieee80211_info_element
+					   *info_element)
+{
+	int ret = 0;
+	u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
+
+	if (element_info == NULL)
+		return -1;
+	if (info_element == NULL)
+		return -1;
+
+	if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
+		memcpy(element_info->qui, info_element->data,
+		       info_element->len);
+		element_info->elementID = info_element->id;
+		element_info->length = info_element->len;
+	} else
+		ret = -1;
+
+	if (ret == 0)
+		ret = ieee80211_verify_qos_info(element_info,
+						QOS_OUI_INFO_SUB_TYPE);
+	return ret;
+}
+
+/*
+ * Write QoS parameters from the ac parameters.
+ */
+static int ieee80211_qos_convert_ac_to_parameters(struct
+						  ieee80211_qos_parameter_info
+						  *param_elm, struct
+						  ieee80211_qos_parameters
+						  *qos_param)
+{
+	int rc = 0;
+	int i;
+	struct ieee80211_qos_ac_parameter *ac_params;
+	u32 txop;
+	u8 cw_min;
+	u8 cw_max;
+
+	for (i = 0; i < QOS_QUEUE_NUM; i++) {
+		ac_params = &(param_elm->ac_params_record[i]);
+
+		qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
+		qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
+
+		cw_min = ac_params->ecw_min_max & 0x0F;
+		qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
+
+		cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
+		qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
+
+		qos_param->flag[i] =
+		    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
+
+		txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
+		qos_param->tx_op_limit[i] = cpu_to_le16(txop);
+	}
+	return rc;
+}
+
+/*
+ * we have a generic data element which it may contain QoS information or
+ * parameters element. check the information element length to decide
+ * which type to read
+ */
+static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
+					     *info_element,
+					     struct ieee80211_network *network)
+{
+	int rc = 0;
+	struct ieee80211_qos_parameters *qos_param = NULL;
+	struct ieee80211_qos_information_element qos_info_element;
+
+	rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
+
+	if (rc == 0) {
+		network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
+		network->flags |= NETWORK_HAS_QOS_INFORMATION;
+	} else {
+		struct ieee80211_qos_parameter_info param_element;
+
+		rc = ieee80211_read_qos_param_element(&param_element,
+						      info_element);
+		if (rc == 0) {
+			qos_param = &(network->qos_data.parameters);
+			ieee80211_qos_convert_ac_to_parameters(&param_element,
+							       qos_param);
+			network->flags |= NETWORK_HAS_QOS_PARAMETERS;
+			network->qos_data.param_count =
+			    param_element.info_element.ac_info & 0x0F;
+		}
+	}
+
+	if (rc == 0) {
+		IEEE80211_DEBUG_QOS("QoS is supported\n");
+		network->qos_data.supported = 1;
+	}
+	return rc;
+}
+
+#ifdef CONFIG_IEEE80211_DEBUG
+#define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
+
+static const char *get_info_element_string(u16 id)
+{
+	switch (id) {
+		MFIE_STRING(SSID);
+		MFIE_STRING(RATES);
+		MFIE_STRING(FH_SET);
+		MFIE_STRING(DS_SET);
+		MFIE_STRING(CF_SET);
+		MFIE_STRING(TIM);
+		MFIE_STRING(IBSS_SET);
+		MFIE_STRING(COUNTRY);
+		MFIE_STRING(HOP_PARAMS);
+		MFIE_STRING(HOP_TABLE);
+		MFIE_STRING(REQUEST);
+		MFIE_STRING(CHALLENGE);
+		MFIE_STRING(POWER_CONSTRAINT);
+		MFIE_STRING(POWER_CAPABILITY);
+		MFIE_STRING(TPC_REQUEST);
+		MFIE_STRING(TPC_REPORT);
+		MFIE_STRING(SUPP_CHANNELS);
+		MFIE_STRING(CSA);
+		MFIE_STRING(MEASURE_REQUEST);
+		MFIE_STRING(MEASURE_REPORT);
+		MFIE_STRING(QUIET);
+		MFIE_STRING(IBSS_DFS);
+		MFIE_STRING(ERP_INFO);
+		MFIE_STRING(RSN);
+		MFIE_STRING(RATES_EX);
+		MFIE_STRING(GENERIC);
+		MFIE_STRING(QOS_PARAMETER);
+	default:
+		return "UNKNOWN";
+	}
+}
+#endif
+
+static int ieee80211_parse_info_param(struct ieee80211_info_element
+				      *info_element, u16 length,
+				      struct ieee80211_network *network)
+{
+	DECLARE_SSID_BUF(ssid);
+	u8 i;
+#ifdef CONFIG_IEEE80211_DEBUG
+	char rates_str[64];
+	char *p;
+#endif
+
+	while (length >= sizeof(*info_element)) {
+		if (sizeof(*info_element) + info_element->len > length) {
+			IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
+					     "info_element->len + 2 > left : "
+					     "info_element->len+2=%zd left=%d, id=%d.\n",
+					     info_element->len +
+					     sizeof(*info_element),
+					     length, info_element->id);
+			/* We stop processing but don't return an error here
+			 * because some misbehaviour APs break this rule. ie.
+			 * Orinoco AP1000. */
+			break;
+		}
+
+		switch (info_element->id) {
+		case MFIE_TYPE_SSID:
+			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_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
+					     print_ssid(ssid, network->ssid,
+							network->ssid_len),
+					     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_MGMT("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_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
+					     rates_str, network->rates_ex_len);
+			break;
+
+		case MFIE_TYPE_DS_SET:
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
+					     info_element->data[0]);
+			network->channel = info_element->data[0];
+			break;
+
+		case MFIE_TYPE_FH_SET:
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_CF_SET:
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
+			break;
+
+		case MFIE_TYPE_TIM:
+			network->tim.tim_count = info_element->data[0];
+			network->tim.tim_period = info_element->data[1];
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
+			break;
+
+		case MFIE_TYPE_ERP_INFO:
+			network->erp_value = info_element->data[0];
+			network->flags |= NETWORK_HAS_ERP_VALUE;
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
+					     network->erp_value);
+			break;
+
+		case MFIE_TYPE_IBSS_SET:
+			network->atim_window = info_element->data[0];
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
+					     network->atim_window);
+			break;
+
+		case MFIE_TYPE_CHALLENGE:
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
+			break;
+
+		case MFIE_TYPE_GENERIC:
+			IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
+					     info_element->len);
+			if (!ieee80211_parse_qos_info_param_IE(info_element,
+							       network))
+				break;
+
+			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_MGMT("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;
+
+		case MFIE_TYPE_QOS_PARAMETER:
+			printk(KERN_ERR
+			       "QoS Error need to parse QOS_PARAMETER IE\n");
+			break;
+			/* 802.11h */
+		case MFIE_TYPE_POWER_CONSTRAINT:
+			network->power_constraint = info_element->data[0];
+			network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
+			break;
+
+		case MFIE_TYPE_CSA:
+			network->power_constraint = info_element->data[0];
+			network->flags |= NETWORK_HAS_CSA;
+			break;
+
+		case MFIE_TYPE_QUIET:
+			network->quiet.count = info_element->data[0];
+			network->quiet.period = info_element->data[1];
+			network->quiet.duration = info_element->data[2];
+			network->quiet.offset = info_element->data[3];
+			network->flags |= NETWORK_HAS_QUIET;
+			break;
+
+		case MFIE_TYPE_IBSS_DFS:
+			if (network->ibss_dfs)
+				break;
+			network->ibss_dfs = kmemdup(info_element->data,
+						    info_element->len,
+						    GFP_ATOMIC);
+			if (!network->ibss_dfs)
+				return 1;
+			network->flags |= NETWORK_HAS_IBSS_DFS;
+			break;
+
+		case MFIE_TYPE_TPC_REPORT:
+			network->tpc_report.transmit_power =
+			    info_element->data[0];
+			network->tpc_report.link_margin = info_element->data[1];
+			network->flags |= NETWORK_HAS_TPC_REPORT;
+			break;
+
+		default:
+			IEEE80211_DEBUG_MGMT
+			    ("Unsupported info element: %s (%d)\n",
+			     get_info_element_string(info_element->id),
+			     info_element->id);
+			break;
+		}
+
+		length -= sizeof(*info_element) + info_element->len;
+		info_element =
+		    (struct ieee80211_info_element *)&info_element->
+		    data[info_element->len];
+	}
+
+	return 0;
+}
+
+static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
+				       *frame, struct ieee80211_rx_stats *stats)
+{
+	struct ieee80211_network network_resp = {
+		.ibss_dfs = NULL,
+	};
+	struct ieee80211_network *network = &network_resp;
+	struct net_device *dev = ieee->dev;
+
+	network->flags = 0;
+	network->qos_data.active = 0;
+	network->qos_data.supported = 0;
+	network->qos_data.param_count = 0;
+	network->qos_data.old_param_count = 0;
+
+	//network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
+	network->atim_window = le16_to_cpu(frame->aid);
+	network->listen_interval = le16_to_cpu(frame->status);
+	memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
+	network->capability = le16_to_cpu(frame->capability);
+	network->last_scanned = jiffies;
+	network->rates_len = network->rates_ex_len = 0;
+	network->last_associate = 0;
+	network->ssid_len = 0;
+	network->erp_value =
+	    (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
+
+	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;
+
+	if (ieee80211_parse_info_param
+	    (frame->info_element, stats->len - sizeof(*frame), network))
+		return 1;
+
+	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;
+	}
+
+	memcpy(&network->stats, stats, sizeof(network->stats));
+
+	if (ieee->handle_assoc_response != NULL)
+		ieee->handle_assoc_response(dev, frame, network);
+
+	return 0;
+}
+
+/***************************************************/
+
+static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
+					 *beacon,
+					 struct ieee80211_network *network,
+					 struct ieee80211_rx_stats *stats)
+{
+	DECLARE_SSID_BUF(ssid);
+
+	network->qos_data.active = 0;
+	network->qos_data.supported = 0;
+	network->qos_data.param_count = 0;
+	network->qos_data.old_param_count = 0;
+
+	/* Pull out fixed field data */
+	memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
+	network->capability = le16_to_cpu(beacon->capability);
+	network->last_scanned = jiffies;
+	network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
+	network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
+	network->beacon_interval = le16_to_cpu(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;
+	network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
+	    0x3 : 0x0;
+
+	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;
+
+	if (ieee80211_parse_info_param
+	    (beacon->info_element, stats->len - sizeof(*beacon), network))
+		return 1;
+
+	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 (%pM)' "
+				     "network.\n",
+				     print_ssid(ssid, network->ssid,
+						 network->ssid_len),
+				     network->bssid);
+		return 1;
+	}
+
+	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) &&
+		!compare_ether_addr(src->bssid, dst->bssid) &&
+		!memcmp(src->ssid, dst->ssid, src->ssid_len));
+}
+
+static void update_network(struct ieee80211_network *dst,
+				  struct ieee80211_network *src)
+{
+	int qos_active;
+	u8 old_param;
+
+	ieee80211_network_reset(dst);
+	dst->ibss_dfs = src->ibss_dfs;
+
+	/* We only update the statistics if they were created by receiving
+	 * the network information on the actual channel the network is on.
+	 *
+	 * This keeps beacons received on neighbor channels from bringing
+	 * down the signal level of an AP. */
+	if (dst->channel == src->stats.received_channel)
+		memcpy(&dst->stats, &src->stats,
+		       sizeof(struct ieee80211_rx_stats));
+	else
+		IEEE80211_DEBUG_SCAN("Network %pM info received "
+			"off channel (%d vs. %d)\n", src->bssid,
+			dst->channel, src->stats.received_channel);
+
+	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;
+	dst->erp_value = src->erp_value;
+	dst->tim = src->tim;
+
+	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;
+	qos_active = src->qos_data.active;
+	old_param = dst->qos_data.old_param_count;
+	if (dst->flags & NETWORK_HAS_QOS_MASK)
+		memcpy(&dst->qos_data, &src->qos_data,
+		       sizeof(struct ieee80211_qos_data));
+	else {
+		dst->qos_data.supported = src->qos_data.supported;
+		dst->qos_data.param_count = src->qos_data.param_count;
+	}
+
+	if (dst->qos_data.supported == 1) {
+		if (dst->ssid_len)
+			IEEE80211_DEBUG_QOS
+			    ("QoS the network %s is QoS supported\n",
+			     dst->ssid);
+		else
+			IEEE80211_DEBUG_QOS
+			    ("QoS the network is QoS supported\n");
+	}
+	dst->qos_data.active = qos_active;
+	dst->qos_data.old_param_count = old_param;
+
+	/* dst->last_associate is not overwritten */
+}
+
+static inline int is_beacon(__le16 fc)
+{
+	return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
+}
+
+static void ieee80211_process_probe_response(struct ieee80211_device
+						    *ieee, struct
+						    ieee80211_probe_response
+						    *beacon, struct ieee80211_rx_stats
+						    *stats)
+{
+	struct net_device *dev = ieee->dev;
+	struct ieee80211_network network = {
+		.ibss_dfs = NULL,
+	};
+	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;
+	DECLARE_SSID_BUF(ssid);
+
+	IEEE80211_DEBUG_SCAN("'%s' (%pM"
+		     "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
+		     print_ssid(ssid, info_element->data, info_element->len),
+		     beacon->header.addr3,
+		     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
+		     (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
+
+	if (ieee80211_network_init(ieee, beacon, &network, stats)) {
+		IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
+				     print_ssid(ssid, info_element->data,
+						 info_element->len),
+				     beacon->header.addr3,
+				     is_beacon(beacon->header.frame_ctl) ?
+				     "BEACON" : "PROBE RESPONSE");
+		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' (%pM) from "
+					     "network list.\n",
+					     print_ssid(ssid, target->ssid,
+							 target->ssid_len),
+					     target->bssid);
+			ieee80211_network_reset(target);
+		} 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' (%pM) via %s.\n",
+				     print_ssid(ssid, network.ssid,
+						 network.ssid_len),
+				     network.bssid,
+				     is_beacon(beacon->header.frame_ctl) ?
+				     "BEACON" : "PROBE RESPONSE");
+#endif
+		memcpy(target, &network, sizeof(*target));
+		network.ibss_dfs = NULL;
+		list_add_tail(&target->list, &ieee->network_list);
+	} else {
+		IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
+				     print_ssid(ssid, target->ssid,
+						 target->ssid_len),
+				     target->bssid,
+				     is_beacon(beacon->header.frame_ctl) ?
+				     "BEACON" : "PROBE RESPONSE");
+		update_network(target, &network);
+		network.ibss_dfs = NULL;
+	}
+
+	spin_unlock_irqrestore(&ieee->lock, flags);
+
+	if (is_beacon(beacon->header.frame_ctl)) {
+		if (ieee->handle_beacon != NULL)
+			ieee->handle_beacon(dev, beacon, target);
+	} else {
+		if (ieee->handle_probe_response != NULL)
+			ieee->handle_probe_response(dev, beacon, target);
+	}
+}
+
+void ieee80211_rx_mgt(struct ieee80211_device *ieee,
+		      struct ieee80211_hdr_4addr *header,
+		      struct ieee80211_rx_stats *stats)
+{
+	switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
+	case IEEE80211_STYPE_ASSOC_RESP:
+		IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+		ieee80211_handle_assoc_resp(ieee,
+					    (struct ieee80211_assoc_response *)
+					    header, stats);
+		break;
+
+	case IEEE80211_STYPE_REASSOC_RESP:
+		IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+		break;
+
+	case IEEE80211_STYPE_PROBE_REQ:
+		IEEE80211_DEBUG_MGMT("received auth (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+
+		if (ieee->handle_probe_request != NULL)
+			ieee->handle_probe_request(ieee->dev,
+						   (struct
+						    ieee80211_probe_request *)
+						   header, stats);
+		break;
+
+	case IEEE80211_STYPE_PROBE_RESP:
+		IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (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(le16_to_cpu
+						       (header->frame_ctl)));
+		IEEE80211_DEBUG_SCAN("Beacon\n");
+		ieee80211_process_probe_response(ieee,
+						 (struct
+						  ieee80211_probe_response *)
+						 header, stats);
+		break;
+	case IEEE80211_STYPE_AUTH:
+
+		IEEE80211_DEBUG_MGMT("received auth (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+
+		if (ieee->handle_auth != NULL)
+			ieee->handle_auth(ieee->dev,
+					  (struct ieee80211_auth *)header);
+		break;
+
+	case IEEE80211_STYPE_DISASSOC:
+		if (ieee->handle_disassoc != NULL)
+			ieee->handle_disassoc(ieee->dev,
+					      (struct ieee80211_disassoc *)
+					      header);
+		break;
+
+	case IEEE80211_STYPE_ACTION:
+		IEEE80211_DEBUG_MGMT("ACTION\n");
+		if (ieee->handle_action)
+			ieee->handle_action(ieee->dev,
+					    (struct ieee80211_action *)
+					    header, stats);
+		break;
+
+	case IEEE80211_STYPE_REASSOC_REQ:
+		IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+
+		IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
+				     ieee->dev->name);
+		if (ieee->handle_reassoc_request != NULL)
+			ieee->handle_reassoc_request(ieee->dev,
+						    (struct ieee80211_reassoc_request *)
+						     header);
+		break;
+
+	case IEEE80211_STYPE_ASSOC_REQ:
+		IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+
+		IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
+				     ieee->dev->name);
+		if (ieee->handle_assoc_request != NULL)
+			ieee->handle_assoc_request(ieee->dev);
+		break;
+
+	case IEEE80211_STYPE_DEAUTH:
+		IEEE80211_DEBUG_MGMT("DEAUTH\n");
+		if (ieee->handle_deauth != NULL)
+			ieee->handle_deauth(ieee->dev,
+					    (struct ieee80211_deauth *)
+					    header);
+		break;
+	default:
+		IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+		IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
+				     ieee->dev->name,
+				     WLAN_FC_GET_STYPE(le16_to_cpu
+						       (header->frame_ctl)));
+		break;
+	}
+}
+
+EXPORT_SYMBOL_GPL(ieee80211_rx_any);
+EXPORT_SYMBOL(ieee80211_rx_mgt);
+EXPORT_SYMBOL(ieee80211_rx);