Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (45 commits)
  [PATCH] Restore channel setting after scan.
  [PATCH] hostap: Fix memory leak on PCI probe error path
  [PATCH] hostap: Remove dead code (duplicated idx != 0)
  [PATCH] hostap: Fix unlikely read overrun in CIS parsing
  [PATCH] hostap: Fix double free in prism2_config() error path
  [PATCH] hostap: Fix ap_add_sta() return value verification
  [PATCH] hostap: Fix hw reset after CMDCODE_ACCESS_WRITE timeout
  [PATCH] wireless/airo: cache wireless scans
  [PATCH] wireless/airo: define default MTU
  [PATCH] wireless/airo: clean up printk usage to print device name
  [PATCH] WE-20 for kernel 2.6.16
  [PATCH] softmac: remove function_enter()
  [PATCH] skge: version 1.5
  [PATCH] skge: compute available ring buffers
  [PATCH] skge: dont free skb until multi-part transmit complete
  [PATCH] skge: multicast statistics fix
  [PATCH] skge: rx_reuse called twice
  [PATCH] skge: dont use dev_alloc_skb for rx buffs
  [PATCH] skge: align receive buffers
  [PATCH] sky2: dont need to use dev_kfree_skb_any
  ...

drivers/net/skge.c

@@ -44,7 +44,7 @@
 #include "skge.h"
 
 #define DRV_NAME		"skge"
-#define DRV_VERSION		"1.4"
+#define DRV_VERSION		"1.5"
 #define PFX			DRV_NAME " "
 
 #define DEFAULT_TX_RING_SIZE	128
@@ -357,7 +357,7 @@ static struct net_device_stats *skge_get_stats(struct net_device *dev)
 	skge->net_stats.rx_bytes = data[1];
 	skge->net_stats.tx_packets = data[2] + data[4] + data[6];
 	skge->net_stats.rx_packets = data[3] + data[5] + data[7];
-	skge->net_stats.multicast = data[5] + data[7];
+	skge->net_stats.multicast = data[3] + data[5];
 	skge->net_stats.collisions = data[10];
 	skge->net_stats.tx_aborted_errors = data[12];
 
@@ -781,7 +781,7 @@ static void skge_rx_setup(struct skge_port *skge, struct skge_element *e,
  * Note: DMA address is not changed by chip.
  * 	 MTU not changed while receiver active.
  */
-static void skge_rx_reuse(struct skge_element *e, unsigned int size)
+static inline void skge_rx_reuse(struct skge_element *e, unsigned int size)
 {
 	struct skge_rx_desc *rd = e->desc;
 
@@ -829,7 +829,7 @@ static int skge_rx_fill(struct skge_port *skge)
 	do {
 		struct sk_buff *skb;
 
-		skb = dev_alloc_skb(skge->rx_buf_size + NET_IP_ALIGN);
+		skb = alloc_skb(skge->rx_buf_size + NET_IP_ALIGN, GFP_KERNEL);
 		if (!skb)
 			return -ENOMEM;
 
@@ -847,8 +847,7 @@ static void skge_link_up(struct skge_port *skge)
 		    LED_BLK_OFF|LED_SYNC_OFF|LED_ON);
 
 	netif_carrier_on(skge->netdev);
-	if (skge->tx_avail > MAX_SKB_FRAGS + 1)
-		netif_wake_queue(skge->netdev);
+	netif_wake_queue(skge->netdev);
 
 	if (netif_msg_link(skge))
 		printk(KERN_INFO PFX
@@ -2155,7 +2154,7 @@ static int skge_up(struct net_device *dev)
 		printk(KERN_INFO PFX "%s: enabling interface\n", dev->name);
 
 	if (dev->mtu > RX_BUF_SIZE)
-		skge->rx_buf_size = dev->mtu + ETH_HLEN + NET_IP_ALIGN;
+		skge->rx_buf_size = dev->mtu + ETH_HLEN;
 	else
 		skge->rx_buf_size = RX_BUF_SIZE;
 
@@ -2190,8 +2189,6 @@ static int skge_up(struct net_device *dev)
 	if (err)
 		goto free_rx_ring;
 
-	skge->tx_avail = skge->tx_ring.count - 1;
-
 	/* Initialize MAC */
 	spin_lock_bh(&hw->phy_lock);
 	if (hw->chip_id == CHIP_ID_GENESIS)
@@ -2294,6 +2291,12 @@ static int skge_down(struct net_device *dev)
 	return 0;
 }
 
+static inline int skge_avail(const struct skge_ring *ring)
+{
+	return ((ring->to_clean > ring->to_use) ? 0 : ring->count)
+		+ (ring->to_clean - ring->to_use) - 1;
+}
+
 static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 {
 	struct skge_port *skge = netdev_priv(dev);
@@ -2314,7 +2317,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 		return NETDEV_TX_LOCKED;
 	}
 
-	if (unlikely(skge->tx_avail < skb_shinfo(skb)->nr_frags +1)) {
+	if (unlikely(skge_avail(&skge->tx_ring) < skb_shinfo(skb)->nr_frags + 1)) {
 		if (!netif_queue_stopped(dev)) {
 			netif_stop_queue(dev);
 
@@ -2390,8 +2393,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 		       dev->name, e - ring->start, skb->len);
 
 	ring->to_use = e->next;
-	skge->tx_avail -= skb_shinfo(skb)->nr_frags + 1;
-	if (skge->tx_avail <= MAX_SKB_FRAGS + 1) {
+	if (skge_avail(&skge->tx_ring) <= MAX_SKB_FRAGS + 1) {
 		pr_debug("%s: transmit queue full\n", dev->name);
 		netif_stop_queue(dev);
 	}
@@ -2404,35 +2406,37 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 	return NETDEV_TX_OK;
 }
 
-static inline void skge_tx_free(struct skge_hw *hw, struct skge_element *e)
+static void skge_tx_complete(struct skge_port *skge, struct skge_element *last)
 {
-	/* This ring element can be skb or fragment */
-	if (e->skb) {
-		pci_unmap_single(hw->pdev,
-			       pci_unmap_addr(e, mapaddr),
-			       pci_unmap_len(e, maplen),
-			       PCI_DMA_TODEVICE);
-		dev_kfree_skb(e->skb);
+	struct pci_dev *pdev = skge->hw->pdev;
+	struct skge_element *e;
+
+	for (e = skge->tx_ring.to_clean; e != last; e = e->next) {
+		struct sk_buff *skb = e->skb;
+		int i;
+
 		e->skb = NULL;
-	} else {
-		pci_unmap_page(hw->pdev,
-			       pci_unmap_addr(e, mapaddr),
-			       pci_unmap_len(e, maplen),
-			       PCI_DMA_TODEVICE);
+		pci_unmap_single(pdev, pci_unmap_addr(e, mapaddr),
+				 skb_headlen(skb), PCI_DMA_TODEVICE);
+
+		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+			e = e->next;
+			pci_unmap_page(pdev, pci_unmap_addr(e, mapaddr),
+				       skb_shinfo(skb)->frags[i].size,
+				       PCI_DMA_TODEVICE);
+		}
+
+		dev_kfree_skb(skb);
 	}
+	skge->tx_ring.to_clean = e;
 }
 
 static void skge_tx_clean(struct skge_port *skge)
 {
-	struct skge_ring *ring = &skge->tx_ring;
-	struct skge_element *e;
 
 	spin_lock_bh(&skge->tx_lock);
-	for (e = ring->to_clean; e != ring->to_use; e = e->next) {
-		++skge->tx_avail;
-		skge_tx_free(skge->hw, e);
-	}
-	ring->to_clean = e;
+	skge_tx_complete(skge, skge->tx_ring.to_use);
+	netif_wake_queue(skge->netdev);
 	spin_unlock_bh(&skge->tx_lock);
 }
 
@@ -2592,7 +2596,7 @@ static inline struct sk_buff *skge_rx_get(struct skge_port *skge,
 		goto error;
 
 	if (len < RX_COPY_THRESHOLD) {
-		skb = dev_alloc_skb(len + 2);
+		skb = alloc_skb(len + 2, GFP_ATOMIC);
 		if (!skb)
 			goto resubmit;
 
@@ -2607,10 +2611,11 @@ static inline struct sk_buff *skge_rx_get(struct skge_port *skge,
 		skge_rx_reuse(e, skge->rx_buf_size);
 	} else {
 		struct sk_buff *nskb;
-		nskb = dev_alloc_skb(skge->rx_buf_size + NET_IP_ALIGN);
+		nskb = alloc_skb(skge->rx_buf_size + NET_IP_ALIGN, GFP_ATOMIC);
 		if (!nskb)
 			goto resubmit;
 
+		skb_reserve(nskb, NET_IP_ALIGN);
 		pci_unmap_single(skge->hw->pdev,
 				 pci_unmap_addr(e, mapaddr),
 				 pci_unmap_len(e, maplen),
@@ -2661,30 +2666,29 @@ static inline struct sk_buff *skge_rx_get(struct skge_port *skge,
 static void skge_tx_done(struct skge_port *skge)
 {
 	struct skge_ring *ring = &skge->tx_ring;
-	struct skge_element *e;
+	struct skge_element *e, *last;
 
 	spin_lock(&skge->tx_lock);
-	for (e = ring->to_clean; prefetch(e->next), e != ring->to_use; e = e->next) {
+	last = ring->to_clean;
+	for (e = ring->to_clean; e != ring->to_use; e = e->next) {
 		struct skge_tx_desc *td = e->desc;
-		u32 control;
 
-		rmb();
-		control = td->control;
-		if (control & BMU_OWN)
+		if (td->control & BMU_OWN)
 			break;
 
-		if (unlikely(netif_msg_tx_done(skge)))
-			printk(KERN_DEBUG PFX "%s: tx done slot %td status 0x%x\n",
-			       skge->netdev->name, e - ring->start, td->status);
-
-		skge_tx_free(skge->hw, e);
-		e->skb = NULL;
-		++skge->tx_avail;
+		if (td->control & BMU_EOF) {
+			last = e->next;
+			if (unlikely(netif_msg_tx_done(skge)))
+				printk(KERN_DEBUG PFX "%s: tx done slot %td\n",
+				       skge->netdev->name, e - ring->start);
+		}
 	}
-	ring->to_clean = e;
+
+	skge_tx_complete(skge, last);
+
 	skge_write8(skge->hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_IRQ_CL_F);
 
-	if (skge->tx_avail > MAX_SKB_FRAGS + 1)
+	if (skge_avail(&skge->tx_ring) > MAX_SKB_FRAGS + 1)
 		netif_wake_queue(skge->netdev);
 
 	spin_unlock(&skge->tx_lock);
@@ -2718,8 +2722,7 @@ static int skge_poll(struct net_device *dev, int *budget)
 			netif_receive_skb(skb);
 
 			++work_done;
-		} else
-			skge_rx_reuse(e, skge->rx_buf_size);
+		}
 	}
 	ring->to_clean = e;
 

drivers/net/skge.h

@@ -2418,7 +2418,6 @@ struct skge_port {
 	int		     port;
 
 	spinlock_t	     tx_lock;
-	u32		     tx_avail;
 	struct skge_ring     tx_ring;
 	struct skge_ring     rx_ring;
 

drivers/net/sky2.c

@@ -1175,7 +1175,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
 		/* just drop the packet if non-linear expansion fails */
 		if (skb_header_cloned(skb) &&
 		    pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
-			dev_kfree_skb_any(skb);
+			dev_kfree_skb(skb);
 			goto out_unlock;
 		}
 
@@ -1324,7 +1324,7 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
 				       PCI_DMA_TODEVICE);
 		}
 
-		dev_kfree_skb_any(skb);
+		dev_kfree_skb(skb);
 	}
 
 	sky2->tx_cons = put;
@@ -2484,7 +2484,7 @@ static const struct sky2_stat {
 	{ "single_collisions", GM_TXF_SNG_COL },
 	{ "multi_collisions", GM_TXF_MUL_COL },
 
-	{ "rx_short",      GM_RXE_SHT },
+	{ "rx_short",      GM_RXF_SHT },
 	{ "rx_runt", 	   GM_RXE_FRAG },
 	{ "rx_64_byte_packets", GM_RXF_64B },
 	{ "rx_65_to_127_byte_packets", GM_RXF_127B },
@@ -2607,7 +2607,7 @@ static struct net_device_stats *sky2_get_stats(struct net_device *dev)
 	sky2->net_stats.rx_bytes = data[1];
 	sky2->net_stats.tx_packets = data[2] + data[4] + data[6];
 	sky2->net_stats.rx_packets = data[3] + data[5] + data[7];
-	sky2->net_stats.multicast = data[5] + data[7];
+	sky2->net_stats.multicast = data[3] + data[5];
 	sky2->net_stats.collisions = data[10];
 	sky2->net_stats.tx_aborted_errors = data[12];
 

drivers/net/wireless/Kconfig

@@ -25,6 +25,15 @@ config NET_RADIO
 	  the tools from
 	  <http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html>.
 
+config NET_WIRELESS_RTNETLINK
+	bool "Wireless Extension API over RtNetlink"
+	---help---
+	  Support the Wireless Extension API over the RtNetlink socket
+	  in addition to the traditional ioctl interface (selected above).
+
+	  For now, few tools use this facility, but it might grow in the
+	  future. The only downside is that it adds 4.5 kB to your kernel.
+
 # Note : the cards are obsolete (can't buy them anymore), but the drivers
 # are not, as people are still using them...
 comment "Obsolete Wireless cards support (pre-802.11)"

drivers/net/wireless/hostap/hostap_ap.c

@@ -3141,7 +3141,7 @@ int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
 	if (ret == 1) {
 		sta = ap_add_sta(ap, sta_addr);
 		if (!sta)
-			ret = -1;
+			return -1;
 		sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 		sta->ap = 1;
 		memset(sta->supported_rates, 0, sizeof(sta->supported_rates));

drivers/net/wireless/hostap/hostap_cs.c

@@ -585,8 +585,6 @@ static int prism2_config(dev_link_t *link)
 	parse = kmalloc(sizeof(cisparse_t), GFP_KERNEL);
 	hw_priv = kmalloc(sizeof(*hw_priv), GFP_KERNEL);
 	if (parse == NULL || hw_priv == NULL) {
-		kfree(parse);
-		kfree(hw_priv);
 		ret = -ENOMEM;
 		goto failed;
 	}

drivers/net/wireless/hostap/hostap_hw.c

@@ -928,15 +928,15 @@ static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len)
 
 	res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL);
 	up(&local->rid_bap_sem);
+
 	if (res) {
 		printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE "
 		       "failed (res=%d, rid=%04x, len=%d)\n",
 		       dev->name, res, rid, len);
-		return res;
-	}
 
-	if (res == -ETIMEDOUT)
-		prism2_hw_reset(dev);
+		if (res == -ETIMEDOUT)
+			prism2_hw_reset(dev);
+	}
 
 	return res;
 }

drivers/net/wireless/hostap/hostap_ioctl.c

@@ -3358,10 +3358,6 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
 	if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
 		if (!sta_ptr)
 			local->tx_keyidx = i;
-		else if (i) {
-			ret = -EINVAL;
-			goto done;
-		}
 	}
 
 

drivers/net/wireless/hostap/hostap_pci.c

@@ -307,7 +307,7 @@ static int prism2_pci_probe(struct pci_dev *pdev,
 	memset(hw_priv, 0, sizeof(*hw_priv));
 
 	if (pci_enable_device(pdev))
-		return -EIO;
+		goto err_out_free;
 
 	phymem = pci_resource_start(pdev, 0);
 
@@ -368,6 +368,8 @@ static int prism2_pci_probe(struct pci_dev *pdev,
  err_out_disable:
 	pci_disable_device(pdev);
 	prism2_free_local_data(dev);
+
+ err_out_free:
 	kfree(hw_priv);
 
 	return -ENODEV;

drivers/net/wireless/hostap/hostap_plx.c

@@ -368,7 +368,7 @@ static int prism2_plx_check_cis(void __iomem *attr_mem, int attr_len,
 
 		switch (cis[pos]) {
 		case CISTPL_CONFIG:
-			if (cis[pos + 1] < 1)
+			if (cis[pos + 1] < 2)
 				goto cis_error;
 			rmsz = (cis[pos + 2] & 0x3c) >> 2;
 			rasz = cis[pos + 2] & 0x03;
@@ -390,7 +390,7 @@ static int prism2_plx_check_cis(void __iomem *attr_mem, int attr_len,
 			break;
 
 		case CISTPL_MANFID:
-			if (cis[pos + 1] < 4)
+			if (cis[pos + 1] < 5)
 				goto cis_error;
 			manfid1 = cis[pos + 2] + (cis[pos + 3] << 8);
 			manfid2 = cis[pos + 4] + (cis[pos + 5] << 8);
@@ -452,7 +452,7 @@ static int prism2_plx_probe(struct pci_dev *pdev,
 	memset(hw_priv, 0, sizeof(*hw_priv));
 
 	if (pci_enable_device(pdev))
-		return -EIO;
+		goto err_out_free;
 
 	/* National Datacomm NCP130 based on TMD7160, not PLX9052. */
 	tmd7160 = (pdev->vendor == 0x15e8) && (pdev->device == 0x0131);
@@ -567,9 +567,6 @@ static int prism2_plx_probe(struct pci_dev *pdev,
 	return hostap_hw_ready(dev);
 
  fail:
-	prism2_free_local_data(dev);
-	kfree(hw_priv);
-
 	if (irq_registered && dev)
 		free_irq(dev->irq, dev);
 
@@ -577,6 +574,10 @@ static int prism2_plx_probe(struct pci_dev *pdev,
 		iounmap(attr_mem);
 
 	pci_disable_device(pdev);
+	prism2_free_local_data(dev);
+
+ err_out_free:
+	kfree(hw_priv);
 
 	return -ENODEV;
 }

include/linux/wireless.h

 /*
  * This file define a set of standard wireless extensions
  *
- * Version :	19	18.3.05
+ * Version :	20	17.2.06
  *
  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 1997-2005 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 1997-2006 Jean Tourrilhes, All Rights Reserved.
  */
 
 #ifndef _LINUX_WIRELESS_H
@@ -80,7 +80,7 @@
  * (there is some stuff that will be added in the future...)
  * I just plan to increment with each new version.
  */
-#define WIRELESS_EXT	19
+#define WIRELESS_EXT	20
 
 /*
  * Changes :
@@ -204,6 +204,10 @@
  *	- Add IW_QUAL_ALL_UPDATED and IW_QUAL_ALL_INVALID macros
  *	- Add explicit flag to tell stats are in dBm : IW_QUAL_DBM
  *	- Add IW_IOCTL_IDX() and IW_EVENT_IDX() macros
+ *
+ * V19 to V20
+ * ----------
+ *	- RtNetlink requests support (SET/GET)
  */
 
 /**************************** CONSTANTS ****************************/

include/net/ieee80211softmac.h

+/*
+ * ieee80211softmac.h - public interface to the softmac
+ *
+ * Copyright (c) 2005 Johannes Berg <johannes@sipsolutions.net>
+ *                    Joseph Jezak <josejx@gentoo.org>
+ *                    Larry Finger <Larry.Finger@lwfinger.net>
+ *                    Danny van Dyk <kugelfang@gentoo.org>
+ *                    Michael Buesch <mbuesch@freenet.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called COPYING.
+ */
+
+#ifndef IEEE80211SOFTMAC_H_
+#define IEEE80211SOFTMAC_H_
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/list.h>
+#include <net/ieee80211.h>
+
+/* Once the API is considered more or less stable,
+ * this should be incremented on API incompatible changes.
+ */
+#define IEEE80211SOFTMAC_API	0
+
+#define IEEE80211SOFTMAC_MAX_RATES_LEN		8
+#define IEEE80211SOFTMAC_MAX_EX_RATES_LEN	255
+
+struct ieee80211softmac_ratesinfo {
+	u8 count;
+	u8 rates[IEEE80211SOFTMAC_MAX_RATES_LEN + IEEE80211SOFTMAC_MAX_EX_RATES_LEN];
+};
+
+/* internal structures */
+struct ieee80211softmac_network;
+struct ieee80211softmac_scaninfo;
+
+struct ieee80211softmac_essid {
+	u8 len;
+	char data[IW_ESSID_MAX_SIZE+1];
+};
+
+struct ieee80211softmac_wpa {
+	char *IE;
+	int IElen;
+	int IEbuflen;
+};
+
+/*
+ * Information about association
+ *
+ * Do we need a lock for this?
+ * We only ever use this structure inlined
+ * into our global struct. I've used its lock,
+ * but maybe we need a local one here?
+ */
+struct ieee80211softmac_assoc_info {
+	/*
+	 * This is the requested ESSID. It is written
+	 * only by the WX handlers.
+	 *
+	 */
+	struct ieee80211softmac_essid req_essid;
+	/*
+	 * the ESSID of the network we're currently
+	 * associated (or trying) to. This is
+	 * updated to the network's actual ESSID
+	 * even if the requested ESSID was 'ANY'
+	 */
+	struct ieee80211softmac_essid associate_essid;
+	
+	/* BSSID we're trying to associate to */
+	char bssid[ETH_ALEN];
+	
+	/* some flags.
+	 * static_essid is valid if the essid is constant,
+	 * this is for use by the wx handlers only.
+	 *
+	 * associating is true, if the network has been
+	 * auth'ed on and we are in the process of associating.
+	 *
+	 * bssvalid is true if we found a matching network
+	 * and saved it's BSSID into the bssid above.
+	 */
+	u8 static_essid:1,
+	   associating:1,
+	   bssvalid:1;
+
+	/* Scan retries remaining */
+	int scan_retry;
+
+	struct work_struct work;
+	struct work_struct timeout;
+};
+
+enum {
+	IEEE80211SOFTMAC_AUTH_OPEN_REQUEST	= 1,
+	IEEE80211SOFTMAC_AUTH_OPEN_RESPONSE	= 2,
+};
+
+enum {
+	IEEE80211SOFTMAC_AUTH_SHARED_REQUEST	= 1,
+	IEEE80211SOFTMAC_AUTH_SHARED_CHALLENGE = 2,
+	IEEE80211SOFTMAC_AUTH_SHARED_RESPONSE	= 3,
+	IEEE80211SOFTMAC_AUTH_SHARED_PASS	= 4,
+};
+
+/* We should make these tunable
+ * AUTH_TIMEOUT seems really long, but that's what it is in BSD */
+#define IEEE80211SOFTMAC_AUTH_TIMEOUT		(12 * HZ)
+#define IEEE80211SOFTMAC_AUTH_RETRY_LIMIT	5
+#define IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT	3
+
+struct ieee80211softmac_txrates {
+	/* The Bit-Rate to be used for multicast frames. */
+	u8 mcast_rate;
+	/* The Bit-Rate to be used for multicast fallback
+	 * (If the device supports fallback and hardware-retry)
+	 */
+	u8 mcast_fallback;
+	/* The Bit-Rate to be used for any other (normal) data packet. */
+	u8 default_rate;
+	/* The Bit-Rate to be used for default fallback
+	 * (If the device supports fallback and hardware-retry)
+	 */
+	u8 default_fallback;
+};
+
+/* Bits for txrates_change callback. */
+#define IEEE80211SOFTMAC_TXRATECHG_DEFAULT		(1 << 0) /* default_rate */
+#define IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK	(1 << 1) /* default_fallback */
+#define IEEE80211SOFTMAC_TXRATECHG_MCAST		(1 << 2) /* mcast_rate */
+#define IEEE80211SOFTMAC_TXRATECHG_MCAST_FBACK		(1 << 3) /* mcast_fallback */
+
+struct ieee80211softmac_device {
+	/* 802.11 structure for data stuff */
+	struct ieee80211_device *ieee;
+	struct net_device *dev;
+
+	/* only valid if associated, then holds the Association ID */
+	u16 association_id;
+	
+	/* the following methods are callbacks that the driver
+	 * using this framework has to assign
+	 */
+
+	/* always assign these */
+	void (*set_bssid_filter)(struct net_device *dev, const u8 *bssid);
+	void (*set_channel)(struct net_device *dev, u8 channel);
+
+	/* assign if you need it, informational only */
+	void (*link_change)(struct net_device *dev);
+
+	/* If the hardware can do scanning, assign _all_ three of these callbacks.
+	 * When the scan finishes, call ieee80211softmac_scan_finished().
+	 */
+	
+	/* when called, start_scan is guaranteed to not be called again
+	 * until you call ieee80211softmac_scan_finished.
+	 * Return 0 if scanning could start, error otherwise.
+	 * SOFTMAC AUTHORS: don't call this, use ieee80211softmac_start_scan */
+	int (*start_scan)(struct net_device *dev);
+	/* this should block until after ieee80211softmac_scan_finished was called
+	 * SOFTMAC AUTHORS: don't call this, use ieee80211softmac_wait_for_scan */
+	void (*wait_for_scan)(struct net_device *dev);
+	/* stop_scan aborts a scan, but is asynchronous.
+	 * if you want to wait for it too, use wait_for_scan
+	 * SOFTMAC AUTHORS: don't call this, use ieee80211softmac_stop_scan */
+	void (*stop_scan)(struct net_device *dev);
+
+	/* we'll need something about beacons here too, for AP or ad-hoc modes */
+
+	/* Transmission rates to be used by the driver.
+	 * The SoftMAC figures out the best possible rates.
+	 * The driver just needs to read them.
+	 */
+	struct ieee80211softmac_txrates txrates;
+	/* If the driver needs to do stuff on TX rate changes, assign this callback. */
+	void (*txrates_change)(struct net_device *dev,
+			       u32 changes, /* see IEEE80211SOFTMAC_TXRATECHG flags */
+			       const struct ieee80211softmac_txrates *rates_before_change);
+
+	/* private stuff follows */
+	/* this lock protects this structure */
+	spinlock_t lock;
+	
+	/* couple of flags */
+	u8 scanning:1, /* protects scanning from being done multiple times at once */
+	   associated:1;
+	
+	struct ieee80211softmac_scaninfo *scaninfo;
+	struct ieee80211softmac_assoc_info associnfo;
+
+	struct list_head auth_queue;
+	struct list_head events;
+
+ 	struct ieee80211softmac_ratesinfo ratesinfo;
+	int txrate_badness;
+	
+	/* WPA stuff */
+	struct ieee80211softmac_wpa wpa;
+
+	/* we need to keep a list of network structs we copied */
+	struct list_head network_list;
+	
+	/* This must be the last item so that it points to the data
+	 * allocated beyond this structure by alloc_ieee80211 */
+	u8 priv[0];
+};
+
+extern void ieee80211softmac_scan_finished(struct ieee80211softmac_device *sm);
+
+static inline void * ieee80211softmac_priv(struct net_device *dev)
+{
+	return ((struct ieee80211softmac_device *)ieee80211_priv(dev))->priv;
+}
+
+extern struct net_device * alloc_ieee80211softmac(int sizeof_priv);
+extern void free_ieee80211softmac(struct net_device *dev);
+
+/* Call this function if you detect a lost TX fragment.
+ * (If the device indicates failure of ACK RX, for example.)
+ * It is wise to call this function if you are able to detect lost packets,
+ * because it contributes to the TX Rates auto adjustment.
+ */
+extern void ieee80211softmac_fragment_lost(struct net_device *dev,
+					   u16 wireless_sequence_number);
+/* Call this function before _start to tell the softmac what rates
+ * the hw supports. The rates parameter is copied, so you can
+ * free it right after calling this function. 
+ * Note that the rates need to be sorted. */
+extern void ieee80211softmac_set_rates(struct net_device *dev, u8 count, u8 *rates);
+
+/* Start the SoftMAC. Call this after you initialized the device
+ * and it is ready to run.
+ */
+extern void ieee80211softmac_start(struct net_device *dev);
+/* Stop the SoftMAC. Call this before you shutdown the device. */
+extern void ieee80211softmac_stop(struct net_device *dev);
+
+/*
+ * Event system
+ */
+
+/* valid event types */
+#define IEEE80211SOFTMAC_EVENT_ANY			-1 /*private use only*/
+#define IEEE80211SOFTMAC_EVENT_SCAN_FINISHED		0
+#define IEEE80211SOFTMAC_EVENT_ASSOCIATED		1
+#define IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED		2
+#define IEEE80211SOFTMAC_EVENT_ASSOCIATE_TIMEOUT	3
+#define IEEE80211SOFTMAC_EVENT_AUTHENTICATED		4
+#define IEEE80211SOFTMAC_EVENT_AUTH_FAILED		5
+#define IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT		6
+#define IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND	7
+/* keep this updated! */
+#define IEEE80211SOFTMAC_EVENT_LAST			7
+/*
+ * If you want to be notified of certain events, you can call
+ * ieee80211softmac_notify[_atomic] with
+ * 	- event set to one of the constants below
+ * 	- fun set to a function pointer of the appropriate type
+ *	- context set to the context data you want passed
+ * The return value is 0, or an error.
+ */
+typedef void (*notify_function_ptr)(struct net_device *dev, void *context);
+
+#define ieee80211softmac_notify(dev, event, fun, context) ieee80211softmac_notify_gfp(dev, event, fun, context, GFP_KERNEL);
+#define ieee80211softmac_notify_atomic(dev, event, fun, context) ieee80211softmac_notify_gfp(dev, event, fun, context, GFP_ATOMIC);
+
+extern int ieee80211softmac_notify_gfp(struct net_device *dev,
+	int event, notify_function_ptr fun, void *context, gfp_t gfp_mask);
+
+/* To clear pending work (for ifconfig down, etc.) */
+extern void
+ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm);
+
+#endif /* IEEE80211SOFTMAC_H_ */

include/net/ieee80211softmac_wx.h

+/*
+ * This file contains the prototypes for the wireless extension
+ * handlers that the softmac API provides. Include this file to
+ * use the wx handlers, you can assign these directly.
+ *
+ * Copyright (c) 2005 Johannes Berg <johannes@sipsolutions.net>
+ *                    Joseph Jezak <josejx@gentoo.org>
+ *                    Larry Finger <Larry.Finger@lwfinger.net>
+ *                    Danny van Dyk <kugelfang@gentoo.org>
+ *                    Michael Buesch <mbuesch@freenet.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called COPYING.
+ */
+
+#ifndef _IEEE80211SOFTMAC_WX_H
+#define _IEEE80211SOFTMAC_WX_H
+
+#include <net/ieee80211softmac.h>
+#include <net/iw_handler.h>
+
+extern int
+ieee80211softmac_wx_trigger_scan(struct net_device *net_dev,
+				 struct iw_request_info *info,
+				 union iwreq_data *data,
+				 char *extra);
+
+extern int
+ieee80211softmac_wx_get_scan_results(struct net_device *net_dev,
+				     struct iw_request_info *info,
+				     union iwreq_data *data,
+				     char *extra);
+
+extern int
+ieee80211softmac_wx_set_essid(struct net_device *net_dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *data,
+			      char *extra);
+
+extern int
+ieee80211softmac_wx_get_essid(struct net_device *net_dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *data,
+			      char *extra);
+
+extern int
+ieee80211softmac_wx_set_rate(struct net_device *net_dev,
+			     struct iw_request_info *info,
+			     union iwreq_data *data,
+			     char *extra);
+
+extern int
+ieee80211softmac_wx_get_rate(struct net_device *net_dev,
+			     struct iw_request_info *info,
+			     union iwreq_data *data,
+			     char *extra);
+
+extern int
+ieee80211softmac_wx_get_wap(struct net_device *net_dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *data,
+			      char *extra);
+
+extern int
+ieee80211softmac_wx_set_wap(struct net_device *net_dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *data,
+			      char *extra);
+
+extern int
+ieee80211softmac_wx_set_genie(struct net_device *dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *wrqu,
+			      char *extra);
+
+extern int
+ieee80211softmac_wx_get_genie(struct net_device *dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *wrqu,
+			      char *extra);
+#endif /* _IEEE80211SOFTMAC_WX */

include/net/iw_handler.h

@@ -4,7 +4,7 @@
  * Version :	7	18.3.05
  *
  * Authors :	Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 2001-2005 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 2001-2006 Jean Tourrilhes, All Rights Reserved.
  */
 
 #ifndef _IW_HANDLER_H
@@ -436,6 +436,16 @@ extern int dev_get_wireless_info(char * buffer, char **start, off_t offset,
 /* Handle IOCTLs, called in net/core/dev.c */
 extern int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd);
 
+/* Handle RtNetlink requests, called in net/core/rtnetlink.c */
+extern int wireless_rtnetlink_set(struct net_device *	dev,
+				  char *		data,
+				  int			len);
+extern int wireless_rtnetlink_get(struct net_device *	dev,
+				  char *		data,
+				  int			len,
+				  char **		p_buf,
+				  int *			p_len);
+
 /* Second : functions that may be called by driver modules */
 
 /* Send a single event to user space */

net/core/rtnetlink.c

@@ -51,6 +51,10 @@
 #include <net/sock.h>
 #include <net/pkt_sched.h>
 #include <net/netlink.h>
+#ifdef CONFIG_NET_WIRELESS_RTNETLINK
+#include <linux/wireless.h>
+#include <net/iw_handler.h>
+#endif	/* CONFIG_NET_WIRELESS_RTNETLINK */
 
 static DEFINE_MUTEX(rtnl_mutex);
 
@@ -467,6 +471,17 @@ static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 			goto out;
 	}
 
+#ifdef CONFIG_NET_WIRELESS_RTNETLINK
+	if (ida[IFLA_WIRELESS - 1]) {
+
+		/* Call Wireless Extensions.
+		 * Various stuff checked in there... */
+		err = wireless_rtnetlink_set(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len);
+		if (err)
+			goto out;
+	}
+#endif	/* CONFIG_NET_WIRELESS_RTNETLINK */
+
 	err = 0;
 
 out:
@@ -477,6 +492,83 @@ static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 	return err;
 }
 
+#ifdef CONFIG_NET_WIRELESS_RTNETLINK
+static int do_getlink(struct sk_buff *in_skb, struct nlmsghdr* in_nlh, void *arg)
+{
+	struct ifinfomsg  *ifm = NLMSG_DATA(in_nlh);
+	struct rtattr    **ida = arg;
+	struct net_device *dev;
+	struct ifinfomsg *r;
+	struct nlmsghdr  *nlh;
+	int err = -ENOBUFS;
+	struct sk_buff *skb;
+	unsigned char	 *b;
+	char *iw_buf = NULL;
+	int iw_buf_len = 0;
+
+	if (ifm->ifi_index >= 0)
+		dev = dev_get_by_index(ifm->ifi_index);
+	else
+		return -EINVAL;
+	if (!dev)
+		return -ENODEV;
+
+#ifdef CONFIG_NET_WIRELESS_RTNETLINK
+	if (ida[IFLA_WIRELESS - 1]) {
+
+		/* Call Wireless Extensions. We need to know the size before
+		 * we can alloc. Various stuff checked in there... */
+		err = wireless_rtnetlink_get(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len, &iw_buf, &iw_buf_len);
+		if (err)
+			goto out;
+	}
+#endif	/* CONFIG_NET_WIRELESS_RTNETLINK */
+
+	/* Create a skb big enough to include all the data.
+	 * Some requests are way bigger than 4k... Jean II */
+	skb = alloc_skb((NLMSG_LENGTH(sizeof(*r))) + (RTA_SPACE(iw_buf_len)),
+			GFP_KERNEL);
+	if (!skb)
+		goto out;
+	b = skb->tail;
+
+	/* Put in the message the usual good stuff */
+	nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, in_nlh->nlmsg_seq,
+			RTM_NEWLINK, sizeof(*r));
+	r = NLMSG_DATA(nlh);
+	r->ifi_family = AF_UNSPEC;
+	r->__ifi_pad = 0;
+	r->ifi_type = dev->type;
+	r->ifi_index = dev->ifindex;
+	r->ifi_flags = dev->flags;
+	r->ifi_change = 0;
+
+	/* Put the wireless payload if it exist */
+	if(iw_buf != NULL)
+		RTA_PUT(skb, IFLA_WIRELESS, iw_buf_len,
+			iw_buf + IW_EV_POINT_OFF);
+
+	nlh->nlmsg_len = skb->tail - b;
+
+	/* Needed ? */
+	NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
+
+	err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
+	if (err > 0)
+		err = 0;
+out:
+	if(iw_buf != NULL)
+		kfree(iw_buf);
+	dev_put(dev);
+	return err;
+
+rtattr_failure:
+nlmsg_failure:
+	kfree_skb(skb);
+	goto out;
+}
+#endif	/* CONFIG_NET_WIRELESS_RTNETLINK */
+
 static int rtnetlink_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	int idx;
@@ -642,7 +734,11 @@ static void rtnetlink_rcv(struct sock *sk, int len)
 
 static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
 {
-	[RTM_GETLINK     - RTM_BASE] = { .dumpit = rtnetlink_dump_ifinfo },
+	[RTM_GETLINK     - RTM_BASE] = {
+#ifdef CONFIG_NET_WIRELESS_RTNETLINK
+					 .doit   = do_getlink,
+#endif	/* CONFIG_NET_WIRELESS_RTNETLINK */
+					 .dumpit = rtnetlink_dump_ifinfo },
 	[RTM_SETLINK     - RTM_BASE] = { .doit   = do_setlink		 },
 	[RTM_GETADDR     - RTM_BASE] = { .dumpit = rtnetlink_dump_all	 },
 	[RTM_GETROUTE    - RTM_BASE] = { .dumpit = rtnetlink_dump_all	 },

net/ieee80211/Kconfig

@@ -66,3 +66,4 @@ config IEEE80211_CRYPT_TKIP
 	This can be compiled as a modules and it will be called
 	"ieee80211_crypt_tkip".
 
+source "net/ieee80211/softmac/Kconfig"

net/ieee80211/Makefile

@@ -10,3 +10,4 @@ ieee80211-objs := \
 	ieee80211_wx.o \
 	ieee80211_geo.o
 
+obj-$(CONFIG_IEEE80211_SOFTMAC) += softmac/

net/ieee80211/ieee80211_rx.c

@@ -780,6 +780,80 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 	return 0;
 }
 
+/* Filter out unrelated packets, call ieee80211_rx[_mgt] */
+int 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)
+		return ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL;
+
+	hdr = (struct ieee80211_hdr_4addr *)skb->data;
+	fc = le16_to_cpu(hdr->frame_ctl);
+
+	if ((fc & IEEE80211_FCTL_VERS) != 0)
+		return -EINVAL;
+		
+	switch (fc & IEEE80211_FCTL_FTYPE) {
+	case IEEE80211_FTYPE_MGMT:
+		ieee80211_rx_mgt(ieee, hdr, stats);
+		return 0;
+	case IEEE80211_FTYPE_DATA:
+		break;
+	case IEEE80211_FTYPE_CTL:
+		return 0;
+	default:
+		return -EINVAL;
+	}
+
+	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)
+		return (ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL);
+	return 0;
+}
+
 #define MGMT_FRAME_FIXED_PART_LENGTH		0x24
 
 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };

net/ieee80211/softmac/Kconfig

+config IEEE80211_SOFTMAC
+	tristate "Software MAC add-on to the IEEE 802.11 networking stack"
+	depends on IEEE80211 && EXPERIMENTAL
+	---help---
+	This option enables the hardware independent software MAC addon
+	for the IEEE 802.11 networking stack.
+
+config IEEE80211_SOFTMAC_DEBUG
+	bool "Enable full debugging output"
+	depends on IEEE80211_SOFTMAC

net/ieee80211/softmac/Makefile

+obj-$(CONFIG_IEEE80211_SOFTMAC) += ieee80211softmac.o
+ieee80211softmac-objs := \
+			ieee80211softmac_io.o \
+			ieee80211softmac_auth.o \
+			ieee80211softmac_module.o \
+			ieee80211softmac_scan.o \
+			ieee80211softmac_wx.o \
+			ieee80211softmac_assoc.o \
+			ieee80211softmac_event.o

net/ieee80211/softmac/ieee80211softmac_event.c

+/*
+ * Event system
+ * Also see comments in public header file and longer explanation below.
+ *
+ * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
+ *                          Joseph Jezak <josejx@gentoo.org>
+ *                          Larry Finger <Larry.Finger@lwfinger.net>
+ *                          Danny van Dyk <kugelfang@gentoo.org>
+ *                          Michael Buesch <mbuesch@freenet.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called COPYING.
+ */
+
+#include "ieee80211softmac_priv.h"
+
+/*
+ * Each event has associated to it
+ *  - an event type (see constants in public header)
+ *  - an event context (see below)
+ *  - the function to be called
+ *  - a context (extra parameter to call the function with)
+ *  - and the softmac struct
+ *
+ * The event context is private and can only be used from
+ * within this module. Its meaning varies with the event
+ * type:
+ *  SCAN_FINISHED:	no special meaning
+ *  ASSOCIATED,
+ *  ASSOCIATE_FAILED,
+ *  ASSOCIATE_TIMEOUT,
+ *  AUTHENTICATED,
+ *  AUTH_FAILED,
+ *  AUTH_TIMEOUT:	a pointer to the network struct
+ * ...
+ * Code within this module can use the event context to be only
+ * called when the event is true for that specific context
+ * as per above table.
+ * If the event context is NULL, then the notification is always called,
+ * regardless of the event context. The event context is not passed to
+ * the callback, it is assumed that the context suffices.
+ *
+ * You can also use the event context only by setting the event type
+ * to -1 (private use only), in which case you'll be notified
+ * whenever the event context matches.
+ */
+
+static char *event_descriptions[IEEE80211SOFTMAC_EVENT_LAST+1] = {
+	"scan finished",
+	"associated",
+	"associating failed",
+	"associating timed out",
+	"authenticated",
+	"authenticating failed",
+	"authenticating timed out",
+	"associating failed because no suitable network was found",
+};
+
+
+static void
+ieee80211softmac_notify_callback(void *d)
+{
+	struct ieee80211softmac_event event = *(struct ieee80211softmac_event*) d;
+	kfree(d);
+	
+	event.fun(event.mac->dev, event.context);
+}
+
+int
+ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac,
+	int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask)
+{
+	struct ieee80211softmac_event *eventptr;
+	unsigned long flags;
+
+	if (event < -1 || event > IEEE80211SOFTMAC_EVENT_LAST)
+		return -ENOSYS;
+	
+	if (!fun)
+		return -EINVAL;
+	
+	eventptr = kmalloc(sizeof(struct ieee80211softmac_event), gfp_mask);
+	if (!eventptr)
+		return -ENOMEM;
+	
+	eventptr->event_type = event;
+	INIT_WORK(&eventptr->work, ieee80211softmac_notify_callback, eventptr);
+	eventptr->fun = fun;
+	eventptr->context = context;
+	eventptr->mac = mac;
+	eventptr->event_context = event_context;
+
+	spin_lock_irqsave(&mac->lock, flags);
+	list_add(&eventptr->list, &mac->events);
+	spin_unlock_irqrestore(&mac->lock, flags);
+
+	return 0;
+}
+
+int
+ieee80211softmac_notify_gfp(struct net_device *dev,
+	int event, notify_function_ptr fun, void *context, gfp_t gfp_mask)
+{
+	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+
+	if (event < 0 || event > IEEE80211SOFTMAC_EVENT_LAST)
+		return -ENOSYS;
+	
+	return ieee80211softmac_notify_internal(mac, event, NULL, fun, context, gfp_mask);
+}
+EXPORT_SYMBOL_GPL(ieee80211softmac_notify_gfp);
+
+/* private -- calling all callbacks that were specified */
+void
+ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_ctx)
+{
+	struct ieee80211softmac_event *eventptr, *tmp;
+	union iwreq_data wrqu;
+	char *msg;
+	
+	if (event >= 0) {
+		msg = event_descriptions[event];
+		wrqu.data.length = strlen(msg);
+		wireless_send_event(mac->dev, IWEVCUSTOM, &wrqu, msg);
+	}
+
+	if (!list_empty(&mac->events))
+		list_for_each_entry_safe(eventptr, tmp, &mac->events, list) {
+			if ((eventptr->event_type == event || eventptr->event_type == -1)
+				&& (eventptr->event_context == NULL || eventptr->event_context == event_ctx)) {
+				list_del(&eventptr->list);
+				schedule_work(&eventptr->work);
+			}
+		}
+}
+
+void
+ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_ctx)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mac->lock, flags);
+	ieee80211softmac_call_events_locked(mac, event, event_ctx);
+
+	spin_unlock_irqrestore(&mac->lock, flags);
+}